From patchwork Fri Sep 13 12:17:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144665 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DC94B16C1 for ; Fri, 13 Sep 2019 12:20:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6A2420CC7 for ; Fri, 13 Sep 2019 12:20:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729652AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32978 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726822AbfIMMRt (ORCPT ); Fri, 13 Sep 2019 08:17:49 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6C0D0308FBA9; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1B9E6450A; Fri, 13 Sep 2019 12:17:48 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 996D0206DE; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 01/26] saner calling conventions for nfs_fs_mount_common() Date: Fri, 13 Sep 2019 08:17:23 -0400 Message-Id: <20190913121748.25391-2-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Allow it to take ERR_PTR() for server and return ERR_CAST() of it in such case. All callers used to open-code that... Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/nfs4super.c | 16 +--------------- fs/nfs/super.c | 11 ++++------- 2 files changed, 5 insertions(+), 22 deletions(-) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 04c57066a11a..baece9857bcf 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -110,21 +110,12 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, { struct nfs_mount_info *mount_info = info; struct nfs_server *server; - struct dentry *mntroot = ERR_PTR(-ENOMEM); mount_info->set_security = nfs_set_sb_security; /* Get a volume representation */ server = nfs4_create_server(mount_info, &nfs_v4); - if (IS_ERR(server)) { - mntroot = ERR_CAST(server); - goto out; - } - - mntroot = nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); - -out: - return mntroot; + return nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, @@ -280,11 +271,6 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, /* create a new volume representation */ server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - if (IS_ERR(server)) { - mntroot = ERR_CAST(server); - goto out; - } - mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, &nfs_v4); out: nfs_free_fhandle(mount_info.mntfh); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 703f595dce90..467d7a636f0b 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1903,9 +1903,6 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, else server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); - if (IS_ERR(server)) - return ERR_CAST(server); - return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); } EXPORT_SYMBOL_GPL(nfs_try_mount); @@ -2641,6 +2638,9 @@ struct dentry *nfs_fs_mount_common(struct nfs_server *server, }; int error; + if (IS_ERR(server)) + return ERR_CAST(server); + if (server->flags & NFS_MOUNT_UNSHARED) compare_super = NULL; @@ -2789,10 +2789,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, /* create a new volume representation */ server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - if (IS_ERR(server)) - mntroot = ERR_CAST(server); - else - mntroot = nfs_fs_mount_common(server, flags, + mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, nfs_mod); dprintk("<-- nfs_xdev_mount() = %ld\n", From patchwork Fri Sep 13 12:17:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144639 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0F91516C1 for ; Fri, 13 Sep 2019 12:19:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ED23A208C2 for ; Fri, 13 Sep 2019 12:19:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729686AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56018 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728577AbfIMMRt (ORCPT ); Fri, 13 Sep 2019 08:17:49 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7CC183C916; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1B98C5D717; Fri, 13 Sep 2019 12:17:48 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 9D73620AB4; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 02/26] nfs: stash server into struct nfs_mount_info Date: Fri, 13 Sep 2019 08:17:24 -0400 Message-Id: <20190913121748.25391-3-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 3 ++- fs/nfs/nfs4super.c | 10 ++++------ fs/nfs/super.c | 19 ++++++++----------- 3 files changed, 14 insertions(+), 18 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index a2346a2f8361..c132e683e1c9 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -150,6 +150,7 @@ struct nfs_mount_info { int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; struct nfs_clone_mount *cloned; + struct nfs_server *server; struct nfs_fh *mntfh; }; @@ -405,7 +406,7 @@ struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, +struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index baece9857bcf..4591d6618efa 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -109,13 +109,12 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { struct nfs_mount_info *mount_info = info; - struct nfs_server *server; mount_info->set_security = nfs_set_sb_security; /* Get a volume representation */ - server = nfs4_create_server(mount_info, &nfs_v4); - return nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); + mount_info->server = nfs4_create_server(mount_info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, mount_info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, @@ -260,7 +259,6 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, .set_security = nfs_clone_sb_security, .cloned = raw_data, }; - struct nfs_server *server; struct dentry *mntroot = ERR_PTR(-ENOMEM); dprintk("--> nfs4_referral_get_sb()\n"); @@ -270,8 +268,8 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, goto out; /* create a new volume representation */ - server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, &nfs_v4); + mount_info.server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); + mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, &nfs_v4); out: nfs_free_fhandle(mount_info.mntfh); return mntroot; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 467d7a636f0b..10544ef8de57 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1896,14 +1896,12 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info, struct nfs_subversion *nfs_mod) { - struct nfs_server *server; - if (mount_info->parsed->need_mount) - server = nfs_try_mount_request(mount_info, nfs_mod); + mount_info->server = nfs_try_mount_request(mount_info, nfs_mod); else - server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); - return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); + return nfs_fs_mount_common(flags, dev_name, mount_info, nfs_mod); } EXPORT_SYMBOL_GPL(nfs_try_mount); @@ -2624,20 +2622,21 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, } EXPORT_SYMBOL_GPL(nfs_clone_sb_security); -struct dentry *nfs_fs_mount_common(struct nfs_server *server, - int flags, const char *dev_name, +struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct nfs_mount_info *mount_info, struct nfs_subversion *nfs_mod) { struct super_block *s; struct dentry *mntroot = ERR_PTR(-ENOMEM); int (*compare_super)(struct super_block *, void *) = nfs_compare_super; + struct nfs_server *server = mount_info->server; struct nfs_sb_mountdata sb_mntdata = { .mntflags = flags, .server = server, }; int error; + mount_info->server = NULL; if (IS_ERR(server)) return ERR_CAST(server); @@ -2778,7 +2777,6 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, .set_security = nfs_clone_sb_security, .cloned = data, }; - struct nfs_server *server; struct dentry *mntroot = ERR_PTR(-ENOMEM); struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; @@ -2787,10 +2785,9 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, mount_info.mntfh = mount_info.cloned->fh; /* create a new volume representation */ - server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); + mount_info.server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - mntroot = nfs_fs_mount_common(server, flags, - dev_name, &mount_info, nfs_mod); + mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, nfs_mod); dprintk("<-- nfs_xdev_mount() = %ld\n", IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); From patchwork Fri Sep 13 12:17:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144641 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B955114E5 for ; Fri, 13 Sep 2019 12:19:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A3336208C2 for ; Fri, 13 Sep 2019 12:19:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388290AbfIMMT2 (ORCPT ); Fri, 13 Sep 2019 08:19:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56024 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728618AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 80E7D63704; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2A7D91001959; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id A340720AC8; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 03/26] nfs: lift setting mount_info from nfs4_remote{,_referral}_mount Date: Fri, 13 Sep 2019 08:17:25 -0400 Message-Id: <20190913121748.25391-4-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Do that (fhandle allocation, setting struct server up) in nfs4_referral_mount() and nfs4_try_mount() resp. and pass the server and pointer to mount_info into nfs_do_root_mount() so that nfs4_remote_referral_mount()/nfs_remote_mount() could be merged. Since we are moving stuff from ->mount() instances to the points prior to vfs_kern_mount() that would trigger those, we need to make sure that do_nfs_root_mount() will do the corresponding cleanup itself if it doesn't trigger those ->mount() instances. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/nfs4super.c | 67 ++++++++++++++++++++++++---------------------- 1 file changed, 35 insertions(+), 32 deletions(-) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 4591d6618efa..773c347df3ab 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -108,32 +108,37 @@ static struct dentry * nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { - struct nfs_mount_info *mount_info = info; - - mount_info->set_security = nfs_set_sb_security; - - /* Get a volume representation */ - mount_info->server = nfs4_create_server(mount_info, &nfs_v4); - return nfs_fs_mount_common(flags, dev_name, mount_info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, - int flags, void *data, const char *hostname) + struct nfs_server *server, int flags, + struct nfs_mount_info *info, + const char *hostname) { struct vfsmount *root_mnt; char *root_devname; size_t len; + if (IS_ERR(server)) + return ERR_CAST(server); + len = strlen(hostname) + 5; root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) + if (root_devname == NULL) { + nfs_free_server(server); return ERR_PTR(-ENOMEM); + } /* Does hostname needs to be enclosed in brackets? */ if (strchr(hostname, ':')) snprintf(root_devname, len, "[%s]:/", hostname); else snprintf(root_devname, len, "%s:/", hostname); - root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); + info->server = server; + root_mnt = vfs_kern_mount(fs_type, flags, root_devname, info); + if (info->server) + nfs_free_server(info->server); + info->server = NULL; kfree(root_devname); return root_mnt; } @@ -234,11 +239,15 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct dentry *res; struct nfs_parsed_mount_data *data = mount_info->parsed; + mount_info->set_security = nfs_set_sb_security; + dfprintk(MOUNT, "--> nfs4_try_mount()\n"); export_path = data->nfs_server.export_path; data->nfs_server.export_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, mount_info, + root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, + nfs4_create_server(mount_info, &nfs_v4), + flags, mount_info, data->nfs_server.hostname); data->nfs_server.export_path = export_path; @@ -254,25 +263,7 @@ static struct dentry * nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, - .set_security = nfs_clone_sb_security, - .cloned = raw_data, - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - - dprintk("--> nfs4_referral_get_sb()\n"); - - mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.cloned == NULL || mount_info.mntfh == NULL) - goto out; - - /* create a new volume representation */ - mount_info.server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, &nfs_v4); -out: - nfs_free_fhandle(mount_info.mntfh); - return mntroot; + return nfs_fs_mount_common(flags, dev_name, raw_data, &nfs_v4); } /* @@ -282,23 +273,35 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; + struct nfs_mount_info mount_info = { + .fill_super = nfs_fill_super, + .set_security = nfs_clone_sb_security, + .cloned = data, + }; char *export_path; struct vfsmount *root_mnt; struct dentry *res; dprintk("--> nfs4_referral_mount()\n"); + mount_info.mntfh = nfs_alloc_fhandle(); + if (!mount_info.mntfh) + return ERR_PTR(-ENOMEM); + export_path = data->mnt_path; data->mnt_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, - flags, data, data->hostname); + nfs4_create_referral_server(mount_info.cloned, + mount_info.mntfh), + flags, &mount_info, data->hostname); data->mnt_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), IS_ERR(res) ? " [error]" : ""); + + nfs_free_fhandle(mount_info.mntfh); return res; } From patchwork Fri Sep 13 12:17:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144577 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 07A511395 for ; Fri, 13 Sep 2019 12:18:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2FE2208C0 for ; Fri, 13 Sep 2019 12:18:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387523AbfIMMSE (ORCPT ); Fri, 13 Sep 2019 08:18:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37640 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387450AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4F16B8980E1; Fri, 13 Sep 2019 12:17:51 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2A3B45D9E2; Fri, 13 Sep 2019 12:17:48 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id A8C0520ACC; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 04/26] nfs: fold nfs4_remote_fs_type and nfs4_remote_referral_fs_type Date: Fri, 13 Sep 2019 08:17:26 -0400 Message-Id: <20190913121748.25391-5-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.67]); Fri, 13 Sep 2019 12:17:51 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro They are identical now. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/nfs4super.c | 26 ++++---------------------- 1 file changed, 4 insertions(+), 22 deletions(-) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 773c347df3ab..d0237d8ffa2b 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -22,8 +22,6 @@ static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); -static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); static struct file_system_type nfs4_remote_fs_type = { .owner = THIS_MODULE, @@ -33,14 +31,6 @@ static struct file_system_type nfs4_remote_fs_type = { .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; -static struct file_system_type nfs4_remote_referral_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_remote_referral_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; - struct file_system_type nfs4_referral_fs_type = { .owner = THIS_MODULE, .name = "nfs4", @@ -111,8 +101,7 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } -static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, - struct nfs_server *server, int flags, +static struct vfsmount *nfs_do_root_mount(struct nfs_server *server, int flags, struct nfs_mount_info *info, const char *hostname) { @@ -135,7 +124,7 @@ static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, else snprintf(root_devname, len, "%s:/", hostname); info->server = server; - root_mnt = vfs_kern_mount(fs_type, flags, root_devname, info); + root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); if (info->server) nfs_free_server(info->server); info->server = NULL; @@ -245,7 +234,7 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, export_path = data->nfs_server.export_path; data->nfs_server.export_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, + root_mnt = nfs_do_root_mount( nfs4_create_server(mount_info, &nfs_v4), flags, mount_info, data->nfs_server.hostname); @@ -259,13 +248,6 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, return res; } -static struct dentry * -nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - return nfs_fs_mount_common(flags, dev_name, raw_data, &nfs_v4); -} - /* * Create an NFS4 server record on referral traversal */ @@ -290,7 +272,7 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, export_path = data->mnt_path; data->mnt_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, + root_mnt = nfs_do_root_mount( nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh), flags, &mount_info, data->hostname); From patchwork Fri Sep 13 12:17:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144663 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 511BE76 for ; 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Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 05/26] nfs: don't bother setting/restoring export_path around do_nfs_root_mount() Date: Fri, 13 Sep 2019 08:17:27 -0400 Message-Id: <20190913121748.25391-6-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro nothing in it will be looking at that thing anyway Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/nfs4super.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index d0237d8ffa2b..a0b66f98f6ba 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -233,12 +233,10 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, dfprintk(MOUNT, "--> nfs4_try_mount()\n"); export_path = data->nfs_server.export_path; - data->nfs_server.export_path = "/"; root_mnt = nfs_do_root_mount( nfs4_create_server(mount_info, &nfs_v4), flags, mount_info, data->nfs_server.hostname); - data->nfs_server.export_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); @@ -271,12 +269,10 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, return ERR_PTR(-ENOMEM); export_path = data->mnt_path; - data->mnt_path = "/"; root_mnt = nfs_do_root_mount( nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh), flags, &mount_info, data->hostname); - data->mnt_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", From patchwork Fri Sep 13 12:17:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144635 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 57F5776 for ; 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Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 06/26] nfs4: fold nfs_do_root_mount/nfs_follow_remote_path Date: Fri, 13 Sep 2019 08:17:28 -0400 Message-Id: <20190913121748.25391-7-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.62]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/nfs4super.c | 88 +++++++++++++++++++--------------------------- 1 file changed, 37 insertions(+), 51 deletions(-) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index a0b66f98f6ba..91ba1b6741dc 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -101,37 +101,6 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } -static struct vfsmount *nfs_do_root_mount(struct nfs_server *server, int flags, - struct nfs_mount_info *info, - const char *hostname) -{ - struct vfsmount *root_mnt; - char *root_devname; - size_t len; - - if (IS_ERR(server)) - return ERR_CAST(server); - - len = strlen(hostname) + 5; - root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) { - nfs_free_server(server); - return ERR_PTR(-ENOMEM); - } - /* Does hostname needs to be enclosed in brackets? */ - if (strchr(hostname, ':')) - snprintf(root_devname, len, "[%s]:/", hostname); - else - snprintf(root_devname, len, "%s:/", hostname); - info->server = server; - root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); - if (info->server) - nfs_free_server(info->server); - info->server = NULL; - kfree(root_devname); - return root_mnt; -} - struct nfs_referral_count { struct list_head list; const struct task_struct *task; @@ -198,11 +167,38 @@ static void nfs_referral_loop_unprotect(void) kfree(p); } -static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt, - const char *export_path) +static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, + struct nfs_mount_info *info, + const char *hostname, + const char *export_path) { + struct vfsmount *root_mnt; struct dentry *dentry; + char *root_devname; int err; + size_t len; + + if (IS_ERR(server)) + return ERR_CAST(server); + + len = strlen(hostname) + 5; + root_devname = kmalloc(len, GFP_KERNEL); + if (root_devname == NULL) { + nfs_free_server(server); + return ERR_PTR(-ENOMEM); + } + + /* Does hostname needs to be enclosed in brackets? */ + if (strchr(hostname, ':')) + snprintf(root_devname, len, "[%s]:/", hostname); + else + snprintf(root_devname, len, "%s:/", hostname); + info->server = server; + root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); + if (info->server) + nfs_free_server(info->server); + info->server = NULL; + kfree(root_devname); if (IS_ERR(root_mnt)) return ERR_CAST(root_mnt); @@ -223,22 +219,17 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info, struct nfs_subversion *nfs_mod) { - char *export_path; - struct vfsmount *root_mnt; - struct dentry *res; struct nfs_parsed_mount_data *data = mount_info->parsed; + struct dentry *res; mount_info->set_security = nfs_set_sb_security; dfprintk(MOUNT, "--> nfs4_try_mount()\n"); - export_path = data->nfs_server.export_path; - root_mnt = nfs_do_root_mount( - nfs4_create_server(mount_info, &nfs_v4), - flags, mount_info, - data->nfs_server.hostname); - - res = nfs_follow_remote_path(root_mnt, export_path); + res = do_nfs4_mount(nfs4_create_server(mount_info, &nfs_v4), + flags, mount_info, + data->nfs_server.hostname, + data->nfs_server.export_path); dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), @@ -258,8 +249,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, .set_security = nfs_clone_sb_security, .cloned = data, }; - char *export_path; - struct vfsmount *root_mnt; struct dentry *res; dprintk("--> nfs4_referral_mount()\n"); @@ -268,13 +257,10 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, if (!mount_info.mntfh) return ERR_PTR(-ENOMEM); - export_path = data->mnt_path; - root_mnt = nfs_do_root_mount( - nfs4_create_referral_server(mount_info.cloned, - mount_info.mntfh), - flags, &mount_info, data->hostname); + res = do_nfs4_mount(nfs4_create_referral_server(mount_info.cloned, + mount_info.mntfh), + flags, &mount_info, data->hostname, data->mnt_path); - res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), IS_ERR(res) ? " [error]" : ""); From patchwork Fri Sep 13 12:17:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144649 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A661976 for ; Fri, 13 Sep 2019 12:19:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8E34E20830 for ; Fri, 13 Sep 2019 12:19:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388354AbfIMMTt (ORCPT ); Fri, 13 Sep 2019 08:19:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33620 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729472AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EF4DE307CDE7; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id BE7C260920; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id BBF6C20BE2; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 07/26] nfs: lift setting mount_info from nfs_xdev_mount() Date: Fri, 13 Sep 2019 08:17:29 -0400 Message-Id: <20190913121748.25391-8-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Do it in nfs_do_submount() instead. As a side benefit, nfs_clone_data doesn't need ->fh and ->fattr anymore. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 3 +-- fs/nfs/namespace.c | 35 +++++++++++++++++++++-------------- fs/nfs/super.c | 25 ++++--------------------- 3 files changed, 26 insertions(+), 37 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index c132e683e1c9..eeb54b45875c 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -42,8 +42,6 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) struct nfs_clone_mount { const struct super_block *sb; const struct dentry *dentry; - struct nfs_fh *fh; - struct nfs_fattr *fattr; char *hostname; char *mnt_path; struct sockaddr *addr; @@ -413,6 +411,7 @@ struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, const char *, struct nfs_mount_info *); void nfs_kill_super(struct super_block *); void nfs_fill_super(struct super_block *, struct nfs_mount_info *); +void nfs_clone_super(struct super_block *, struct nfs_mount_info *); extern struct rpc_stat nfs_rpcstat; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 9287eb666322..7c78e6956639 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -19,6 +19,7 @@ #include #include #include "internal.h" +#include "nfs.h" #define NFSDBG_FACILITY NFSDBG_VFS @@ -210,16 +211,6 @@ void nfs_release_automount_timer(void) cancel_delayed_work(&nfs_automount_task); } -/* - * Clone a mountpoint of the appropriate type - */ -static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, - const char *devname, - struct nfs_clone_mount *mountdata) -{ - return vfs_submount(mountdata->dentry, &nfs_xdev_fs_type, devname, mountdata); -} - /** * nfs_do_submount - set up mountpoint when crossing a filesystem boundary * @dentry: parent directory @@ -231,13 +222,20 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr, rpc_authflavor_t authflavor) { + struct super_block *sb = dentry->d_sb; struct nfs_clone_mount mountdata = { - .sb = dentry->d_sb, + .sb = sb, .dentry = dentry, - .fh = fh, - .fattr = fattr, .authflavor = authflavor, }; + struct nfs_mount_info mount_info = { + .fill_super = nfs_clone_super, + .set_security = nfs_clone_sb_security, + .cloned = &mountdata, + .mntfh = fh, + }; + struct nfs_subversion *nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod; + struct nfs_server *server; struct vfsmount *mnt; char *page = (char *) __get_free_page(GFP_USER); char *devname; @@ -245,12 +243,21 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, if (page == NULL) return ERR_PTR(-ENOMEM); + server = nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, + fattr, authflavor); + if (IS_ERR(server)) + return ERR_CAST(server); + + mount_info.server = server; + devname = nfs_devname(dentry, page, PAGE_SIZE); if (IS_ERR(devname)) mnt = ERR_CAST(devname); else - mnt = nfs_do_clone_mount(NFS_SB(dentry->d_sb), devname, &mountdata); + mnt = vfs_submount(dentry, &nfs_xdev_fs_type, devname, &mount_info); + if (mount_info.server) + nfs_free_server(mount_info.server); free_page((unsigned long)page); return mnt; } diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 10544ef8de57..7fc354207347 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2386,7 +2386,7 @@ EXPORT_SYMBOL_GPL(nfs_fill_super); /* * Finish setting up a cloned NFS2/3/4 superblock */ -static void nfs_clone_super(struct super_block *sb, +void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info) { const struct super_block *old_sb = mount_info->cloned->sb; @@ -2771,27 +2771,10 @@ static struct dentry * nfs_xdev_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_clone_mount *data = raw_data; - struct nfs_mount_info mount_info = { - .fill_super = nfs_clone_super, - .set_security = nfs_clone_sb_security, - .cloned = data, - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; - - dprintk("--> nfs_xdev_mount()\n"); + struct nfs_mount_info *info = raw_data; + struct nfs_subversion *nfs_mod = NFS_SB(info->cloned->sb)->nfs_client->cl_nfs_mod; - mount_info.mntfh = mount_info.cloned->fh; - - /* create a new volume representation */ - mount_info.server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - - mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, nfs_mod); - - dprintk("<-- nfs_xdev_mount() = %ld\n", - IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); - return mntroot; + return nfs_fs_mount_common(flags, dev_name, info, nfs_mod); } #if IS_ENABLED(CONFIG_NFS_V4) From patchwork Fri Sep 13 12:17:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144671 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 836EE76 for ; Fri, 13 Sep 2019 12:20:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BC072089F for ; Fri, 13 Sep 2019 12:20:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388413AbfIMMUK (ORCPT ); Fri, 13 Sep 2019 08:20:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43464 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728666AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D47E8C053FDF; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id B6719608AB; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id C190F20BF9; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 08/26] nfs: stash nfs_subversion reference into nfs_mount_info Date: Fri, 13 Sep 2019 08:17:30 -0400 Message-Id: <20190913121748.25391-9-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro That will allow to get rid of passing those references around in quite a few places. Moreover, that will allow to merge xdev and remote file_system_type. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 1 + fs/nfs/namespace.c | 6 +++--- fs/nfs/nfs4super.c | 1 + fs/nfs/super.c | 1 + 4 files changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index eeb54b45875c..0c42cf685d4b 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -150,6 +150,7 @@ struct nfs_mount_info { struct nfs_clone_mount *cloned; struct nfs_server *server; struct nfs_fh *mntfh; + struct nfs_subversion *nfs_mod; }; extern int nfs_mount(struct nfs_mount_request *info); diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 7c78e6956639..0d0587ed7d94 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -233,8 +233,8 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, .set_security = nfs_clone_sb_security, .cloned = &mountdata, .mntfh = fh, + .nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod, }; - struct nfs_subversion *nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod; struct nfs_server *server; struct vfsmount *mnt; char *page = (char *) __get_free_page(GFP_USER); @@ -243,8 +243,8 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, if (page == NULL) return ERR_PTR(-ENOMEM); - server = nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, - fattr, authflavor); + server = mount_info.nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, + fattr, authflavor); if (IS_ERR(server)) return ERR_CAST(server); diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 91ba1b6741dc..88d83cab8e9b 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -248,6 +248,7 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, .fill_super = nfs_fill_super, .set_security = nfs_clone_sb_security, .cloned = data, + .nfs_mod = &nfs_v4, }; struct dentry *res; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 7fc354207347..2a6b4e4b0a2d 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2736,6 +2736,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, mntroot = ERR_CAST(nfs_mod); goto out; } + mount_info.nfs_mod = nfs_mod; mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); From patchwork Fri Sep 13 12:17:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144611 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E7BEB14E5 for ; Fri, 13 Sep 2019 12:18:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6F6C2089F for ; Fri, 13 Sep 2019 12:18:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388253AbfIMMS4 (ORCPT ); Fri, 13 Sep 2019 08:18:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33624 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729564AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0EB88307CDEA; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id D1EA36061E; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id C70C520C2E; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 09/26] nfs: don't bother passing nfs_subversion to ->try_mount() and nfs_fs_mount_common() Date: Fri, 13 Sep 2019 08:17:31 -0400 Message-Id: <20190913121748.25391-10-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 6 ++---- fs/nfs/nfs4_fs.h | 2 +- fs/nfs/nfs4super.c | 5 ++--- fs/nfs/super.c | 19 ++++++++----------- include/linux/nfs_xdr.h | 3 +-- 5 files changed, 14 insertions(+), 21 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 0c42cf685d4b..3334d0f3ecf9 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -401,12 +401,10 @@ extern struct file_system_type nfs_xdev_fs_type; extern struct file_system_type nfs4_referral_fs_type; #endif bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); -struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, - struct nfs_subversion *); +struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(int, const char *, - struct nfs_mount_info *, struct nfs_subversion *); +struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, const char *, struct nfs_mount_info *); diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 3564da1ba8a1..67ecd7bb512f 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -517,7 +517,7 @@ extern const nfs4_stateid invalid_stateid; /* nfs4super.c */ struct nfs_mount_info; extern struct nfs_subversion nfs_v4; -struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); +struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *); extern bool nfs4_disable_idmapping; extern unsigned short max_session_slots; extern unsigned short max_session_cb_slots; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 88d83cab8e9b..83bca2ea566c 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -98,7 +98,7 @@ static struct dentry * nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { - return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, info); } struct nfs_referral_count { @@ -216,8 +216,7 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, } struct dentry *nfs4_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) + struct nfs_mount_info *mount_info) { struct nfs_parsed_mount_data *data = mount_info->parsed; struct dentry *res; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 2a6b4e4b0a2d..ca6295945880 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1893,15 +1893,15 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf } struct dentry *nfs_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) + struct nfs_mount_info *mount_info) { + struct nfs_subversion *nfs_mod = mount_info->nfs_mod; if (mount_info->parsed->need_mount) mount_info->server = nfs_try_mount_request(mount_info, nfs_mod); else mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); - return nfs_fs_mount_common(flags, dev_name, mount_info, nfs_mod); + return nfs_fs_mount_common(flags, dev_name, mount_info); } EXPORT_SYMBOL_GPL(nfs_try_mount); @@ -2623,8 +2623,7 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, EXPORT_SYMBOL_GPL(nfs_clone_sb_security); struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, - struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) + struct nfs_mount_info *mount_info) { struct super_block *s; struct dentry *mntroot = ERR_PTR(-ENOMEM); @@ -2652,7 +2651,8 @@ struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, sb_mntdata.mntflags |= SB_SYNCHRONOUS; /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); + s = sget(mount_info->nfs_mod->nfs_fs, compare_super, nfs_set_super, + flags, &sb_mntdata); if (IS_ERR(s)) { mntroot = ERR_CAST(s); goto out_err_nosb; @@ -2738,7 +2738,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, } mount_info.nfs_mod = nfs_mod; - mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); + mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info); put_nfs_version(nfs_mod); out: @@ -2772,10 +2772,7 @@ static struct dentry * nfs_xdev_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_mount_info *info = raw_data; - struct nfs_subversion *nfs_mod = NFS_SB(info->cloned->sb)->nfs_client->cl_nfs_mod; - - return nfs_fs_mount_common(flags, dev_name, info, nfs_mod); + return nfs_fs_mount_common(flags, dev_name, raw_data); } #if IS_ENABLED(CONFIG_NFS_V4) diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 9b8324ec08f3..4fdf4a523185 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1638,8 +1638,7 @@ struct nfs_rpc_ops { struct nfs_fsinfo *); struct vfsmount *(*submount) (struct nfs_server *, struct dentry *, struct nfs_fh *, struct nfs_fattr *); - struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *, - struct nfs_subversion *); + struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *); int (*getattr) (struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *, struct inode *); From patchwork Fri Sep 13 12:17:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144619 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4682A16C1 for ; Fri, 13 Sep 2019 12:19:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2674E208C2 for ; Fri, 13 Sep 2019 12:19:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388266AbfIMMS5 (ORCPT ); Fri, 13 Sep 2019 08:18:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51952 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729558AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 06267C06511C; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id CF89460C63; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id CCA5020C2F; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 10/26] nfs: merge xdev and remote file_system_type Date: Fri, 13 Sep 2019 08:17:32 -0400 Message-Id: <20190913121748.25391-11-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro they are identical now... Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 2 +- fs/nfs/namespace.c | 2 +- fs/nfs/nfs4super.c | 22 +--------------------- fs/nfs/super.c | 14 ++++++++------ 4 files changed, 11 insertions(+), 29 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 3334d0f3ecf9..ac3478827a83 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -396,7 +396,7 @@ extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); /* super.c */ extern const struct super_operations nfs_sops; extern struct file_system_type nfs_fs_type; -extern struct file_system_type nfs_xdev_fs_type; +extern struct file_system_type nfs_prepared_fs_type; #if IS_ENABLED(CONFIG_NFS_V4) extern struct file_system_type nfs4_referral_fs_type; #endif diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 0d0587ed7d94..970f92a860ed 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -254,7 +254,7 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, if (IS_ERR(devname)) mnt = ERR_CAST(devname); else - mnt = vfs_submount(dentry, &nfs_xdev_fs_type, devname, &mount_info); + mnt = vfs_submount(dentry, &nfs_prepared_fs_type, devname, &mount_info); if (mount_info.server) nfs_free_server(mount_info.server); diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 83bca2ea566c..5bca30f704e4 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -18,19 +18,9 @@ static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc); static void nfs4_evict_inode(struct inode *inode); -static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); -static struct file_system_type nfs4_remote_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_remote_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; - struct file_system_type nfs4_referral_fs_type = { .owner = THIS_MODULE, .name = "nfs4", @@ -91,16 +81,6 @@ static void nfs4_evict_inode(struct inode *inode) nfs_clear_inode(inode); } -/* - * Get the superblock for the NFS4 root partition - */ -static struct dentry * -nfs4_remote_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *info) -{ - return nfs_fs_mount_common(flags, dev_name, info); -} - struct nfs_referral_count { struct list_head list; const struct task_struct *task; @@ -194,7 +174,7 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, else snprintf(root_devname, len, "%s:/", hostname); info->server = server; - root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); + root_mnt = vfs_kern_mount(&nfs_prepared_fs_type, flags, root_devname, info); if (info->server) nfs_free_server(info->server); info->server = NULL; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index ca6295945880..d80992d2b6fe 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -293,7 +293,7 @@ static match_table_t nfs_vers_tokens = { { Opt_vers_err, NULL } }; -static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, +static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); struct file_system_type nfs_fs_type = { @@ -306,13 +306,14 @@ struct file_system_type nfs_fs_type = { MODULE_ALIAS_FS("nfs"); EXPORT_SYMBOL_GPL(nfs_fs_type); -struct file_system_type nfs_xdev_fs_type = { +struct file_system_type nfs_prepared_fs_type = { .owner = THIS_MODULE, .name = "nfs", - .mount = nfs_xdev_mount, + .mount = nfs_prepared_mount, .kill_sb = nfs_kill_super, .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; +EXPORT_SYMBOL_GPL(nfs_prepared_fs_type); const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, @@ -2766,11 +2767,12 @@ void nfs_kill_super(struct super_block *s) EXPORT_SYMBOL_GPL(nfs_kill_super); /* - * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) + * Internal use only: mount_info is already set up by caller. + * Used for mountpoint crossings and for nfs4 root. */ static struct dentry * -nfs_xdev_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) +nfs_prepared_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { return nfs_fs_mount_common(flags, dev_name, raw_data); } From patchwork Fri Sep 13 12:17:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144659 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 486FA76 for ; Fri, 13 Sep 2019 12:20:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 324E220CC7 for ; Fri, 13 Sep 2019 12:20:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388388AbfIMMT7 (ORCPT ); Fri, 13 Sep 2019 08:19:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43064 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729449AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EE0A283F45; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id D00761001959; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id D2EA420C3B; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 11/26] nfs: unexport nfs_fs_mount_common() Date: Fri, 13 Sep 2019 08:17:33 -0400 Message-Id: <20190913121748.25391-12-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro Make it static, even. And remove a stale extern of (long-gone) nfs_xdev_mount_common() from internal.h, while we are at it. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 3 --- fs/nfs/super.c | 5 +++-- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index ac3478827a83..207d1574e246 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -404,10 +404,7 @@ bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); -struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, - const char *, struct nfs_mount_info *); void nfs_kill_super(struct super_block *); void nfs_fill_super(struct super_block *, struct nfs_mount_info *); void nfs_clone_super(struct super_block *, struct nfs_mount_info *); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index d80992d2b6fe..c3ee83c17f07 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1893,6 +1893,8 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); } +static struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); + struct dentry *nfs_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { @@ -2623,7 +2625,7 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, } EXPORT_SYMBOL_GPL(nfs_clone_sb_security); -struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, +static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { struct super_block *s; @@ -2705,7 +2707,6 @@ struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, deactivate_locked_super(s); goto out; } -EXPORT_SYMBOL_GPL(nfs_fs_mount_common); struct dentry *nfs_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) From patchwork Fri Sep 13 12:17:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144621 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6690F18A6 for ; Fri, 13 Sep 2019 12:19:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 506E0208C2 for ; Fri, 13 Sep 2019 12:19:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388262AbfIMMS5 (ORCPT ); Fri, 13 Sep 2019 08:18:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1682 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729591AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 21C32C050DFF; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id DEF6A6013A; Fri, 13 Sep 2019 12:17:49 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id D91D420CEB; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 12/26] nfs: don't pass nfs_subversion to ->create_server() Date: Fri, 13 Sep 2019 08:17:34 -0400 Message-Id: <20190913121748.25391-13-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro pick it from mount_info Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/client.c | 4 ++-- fs/nfs/internal.h | 7 ++----- fs/nfs/nfs3_fs.h | 2 +- fs/nfs/nfs3client.c | 5 ++--- fs/nfs/nfs4client.c | 3 +-- fs/nfs/nfs4super.c | 2 +- fs/nfs/super.c | 14 +++++++------- include/linux/nfs_xdr.h | 2 +- 8 files changed, 17 insertions(+), 22 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 30838304a0bf..130c065141b3 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -940,10 +940,10 @@ EXPORT_SYMBOL_GPL(nfs_free_server); * Create a version 2 or 3 volume record * - keyed on server and FSID */ -struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) { struct nfs_server *server; + struct nfs_subversion *nfs_mod = mount_info->nfs_mod; struct nfs_fattr *fattr; int error; diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 207d1574e246..444d0fc2bcca 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -178,11 +178,8 @@ extern struct nfs_client *nfs4_find_client_ident(struct net *, int); extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); -extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, - struct nfs_subversion *); -extern struct nfs_server *nfs4_create_server( - struct nfs_mount_info *, - struct nfs_subversion *); +extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); +extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, struct nfs_fh *); extern int nfs4_update_server(struct nfs_server *server, const char *hostname, diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h index f82e11c4cb56..09602dc1889f 100644 --- a/fs/nfs/nfs3_fs.h +++ b/fs/nfs/nfs3_fs.h @@ -27,7 +27,7 @@ static inline int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, #endif /* CONFIG_NFS_V3_ACL */ /* nfs3client.c */ -struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); +struct nfs_server *nfs3_create_server(struct nfs_mount_info *); struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c index 148ceb74d27c..a340b5d0e1a3 100644 --- a/fs/nfs/nfs3client.c +++ b/fs/nfs/nfs3client.c @@ -46,10 +46,9 @@ static inline void nfs_init_server_aclclient(struct nfs_server *server) } #endif -struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info) { - struct nfs_server *server = nfs_create_server(mount_info, nfs_mod); + struct nfs_server *server = nfs_create_server(mount_info); /* Create a client RPC handle for the NFS v3 ACL management interface */ if (!IS_ERR(server)) nfs_init_server_aclclient(server); diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index da6204025a2d..16fba83b5c4b 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1109,8 +1109,7 @@ static int nfs4_init_server(struct nfs_server *server, */ /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, struct nfs_fh *mntfh)*/ -struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) { struct nfs_server *server; bool auth_probe; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 5bca30f704e4..b6cf62125380 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -205,7 +205,7 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, dfprintk(MOUNT, "--> nfs4_try_mount()\n"); - res = do_nfs4_mount(nfs4_create_server(mount_info, &nfs_v4), + res = do_nfs4_mount(nfs4_create_server(mount_info), flags, mount_info, data->nfs_server.hostname, data->nfs_server.export_path); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index c3ee83c17f07..157d340333c8 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1820,8 +1820,7 @@ static int nfs_request_mount(struct nfs_parsed_mount_data *args, return 0; } -static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info) { int status; unsigned int i; @@ -1831,6 +1830,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf struct nfs_parsed_mount_data *args = mount_info->parsed; rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; unsigned int authlist_len = ARRAY_SIZE(authlist); + struct nfs_subversion *nfs_mod = mount_info->nfs_mod; status = nfs_request_mount(args, mount_info->mntfh, authlist, &authlist_len); @@ -1847,7 +1847,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf args->selected_flavor); if (status) return ERR_PTR(status); - return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + return nfs_mod->rpc_ops->create_server(mount_info); } /* @@ -1874,7 +1874,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); args->selected_flavor = flavor; - server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + server = nfs_mod->rpc_ops->create_server(mount_info); if (!IS_ERR(server)) return server; } @@ -1890,7 +1890,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); args->selected_flavor = RPC_AUTH_UNIX; - return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + return nfs_mod->rpc_ops->create_server(mount_info); } static struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); @@ -1900,9 +1900,9 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, { struct nfs_subversion *nfs_mod = mount_info->nfs_mod; if (mount_info->parsed->need_mount) - mount_info->server = nfs_try_mount_request(mount_info, nfs_mod); + mount_info->server = nfs_try_mount_request(mount_info); else - mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + mount_info->server = nfs_mod->rpc_ops->create_server(mount_info); return nfs_fs_mount_common(flags, dev_name, mount_info); } diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 4fdf4a523185..82bdb91da2ae 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1705,7 +1705,7 @@ struct nfs_rpc_ops { struct nfs_client *(*init_client) (struct nfs_client *, const struct nfs_client_initdata *); void (*free_client) (struct nfs_client *); - struct nfs_server *(*create_server)(struct nfs_mount_info *, struct nfs_subversion *); + struct nfs_server *(*create_server)(struct nfs_mount_info *); struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); }; From patchwork Fri Sep 13 12:17:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144603 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3466714E5 for ; Fri, 13 Sep 2019 12:18:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11D6A2089F for ; Fri, 13 Sep 2019 12:18:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388208AbfIMMSl (ORCPT ); Fri, 13 Sep 2019 08:18:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52228 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729637AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 33FDF309B68B; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 091FE608AB; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id DE83820D2C; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 13/26] nfs: get rid of mount_info ->fill_super() Date: Fri, 13 Sep 2019 08:17:35 -0400 Message-Id: <20190913121748.25391-14-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro The only possible values are nfs_fill_super and nfs_clone_super. The latter is used only when crossing into a submount and it is almost identical to the former; the only differences are * ->s_time_gran unconditionally set to 1 (even for v2 mounts). Regression dating back to 2012, actually. * ->s_blocksize/->s_blocksize_bits set to that of parent. Rather than messing with the method, stash ->s_blocksize_bits in mount_info in submount case and after the (now unconditional) call of nfs_fill_super() override ->s_blocksize/->s_blocksize_bits if that has been set. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 4 +-- fs/nfs/namespace.c | 2 +- fs/nfs/nfs4super.c | 1 - fs/nfs/super.c | 66 +++++++++++----------------------------------- 4 files changed, 18 insertions(+), 55 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 444d0fc2bcca..fa737e37f7c9 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -144,7 +144,7 @@ struct nfs_mount_request { }; struct nfs_mount_info { - void (*fill_super)(struct super_block *, struct nfs_mount_info *); + unsigned int inherited_bsize; int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; struct nfs_clone_mount *cloned; @@ -403,8 +403,6 @@ int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_ int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); void nfs_kill_super(struct super_block *); -void nfs_fill_super(struct super_block *, struct nfs_mount_info *); -void nfs_clone_super(struct super_block *, struct nfs_mount_info *); extern struct rpc_stat nfs_rpcstat; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 970f92a860ed..7bc5b9b8f5ea 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -229,7 +229,7 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, .authflavor = authflavor, }; struct nfs_mount_info mount_info = { - .fill_super = nfs_clone_super, + .inherited_bsize = sb->s_blocksize_bits, .set_security = nfs_clone_sb_security, .cloned = &mountdata, .mntfh = fh, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index b6cf62125380..d387c3c3b600 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -224,7 +224,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, { struct nfs_clone_mount *data = raw_data; struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, .set_security = nfs_clone_sb_security, .cloned = data, .nfs_mod = &nfs_v4, diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 157d340333c8..89751ce21110 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2339,29 +2339,9 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) EXPORT_SYMBOL_GPL(nfs_remount); /* - * Initialise the common bits of the superblock + * Finish setting up an NFS superblock */ -static void nfs_initialise_sb(struct super_block *sb) -{ - struct nfs_server *server = NFS_SB(sb); - - sb->s_magic = NFS_SUPER_MAGIC; - - /* We probably want something more informative here */ - snprintf(sb->s_id, sizeof(sb->s_id), - "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); - - if (sb->s_blocksize == 0) - sb->s_blocksize = nfs_block_bits(server->wsize, - &sb->s_blocksize_bits); - - nfs_super_set_maxbytes(sb, server->maxfilesize); -} - -/* - * Finish setting up an NFS2/3 superblock - */ -void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) +static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) { struct nfs_parsed_mount_data *data = mount_info->parsed; struct nfs_server *server = NFS_SB(sb); @@ -2382,35 +2362,17 @@ void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) sb->s_export_op = &nfs_export_ops; } - nfs_initialise_sb(sb); -} -EXPORT_SYMBOL_GPL(nfs_fill_super); - -/* - * Finish setting up a cloned NFS2/3/4 superblock - */ -void nfs_clone_super(struct super_block *sb, - struct nfs_mount_info *mount_info) -{ - const struct super_block *old_sb = mount_info->cloned->sb; - struct nfs_server *server = NFS_SB(sb); + sb->s_magic = NFS_SUPER_MAGIC; - sb->s_blocksize_bits = old_sb->s_blocksize_bits; - sb->s_blocksize = old_sb->s_blocksize; - sb->s_maxbytes = old_sb->s_maxbytes; - sb->s_xattr = old_sb->s_xattr; - sb->s_op = old_sb->s_op; - sb->s_time_gran = 1; - sb->s_export_op = old_sb->s_export_op; + /* We probably want something more informative here */ + snprintf(sb->s_id, sizeof(sb->s_id), + "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); - if (server->nfs_client->rpc_ops->version != 2) { - /* The VFS shouldn't apply the umask to mode bits. We will do - * so ourselves when necessary. - */ - sb->s_flags |= SB_POSIXACL; - } + if (sb->s_blocksize == 0) + sb->s_blocksize = nfs_block_bits(server->wsize, + &sb->s_blocksize_bits); - nfs_initialise_sb(sb); + nfs_super_set_maxbytes(sb, server->maxfilesize); } static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) @@ -2676,8 +2638,13 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, } if (!s->s_root) { + unsigned bsize = mount_info->inherited_bsize; /* initial superblock/root creation */ - mount_info->fill_super(s, mount_info); + nfs_fill_super(s, mount_info); + if (bsize) { + s->s_blocksize_bits = bsize; + s->s_blocksize = 1U << bsize; + } nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); if (!(server->flags & NFS_MOUNT_UNSHARED)) s->s_iflags |= SB_I_MULTIROOT; @@ -2712,7 +2679,6 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, .set_security = nfs_set_sb_security, }; struct dentry *mntroot = ERR_PTR(-ENOMEM); From patchwork Fri Sep 13 12:17:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144647 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A523016C1 for ; Fri, 13 Sep 2019 12:19:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8471B2089F for ; Fri, 13 Sep 2019 12:19:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388293AbfIMMT2 (ORCPT ); Fri, 13 Sep 2019 08:19:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33032 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729632AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2CED211A24; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0D90B60C44; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id E445F20D2E; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 14/26] nfs_clone_sb_security(): simplify the check for server bogosity Date: Fri, 13 Sep 2019 08:17:36 -0400 Message-Id: <20190913121748.25391-15-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro We used to check ->i_op for being nfs_dir_inode_operations. With separate inode_operations for v3 and v4 that became bogus, but rather than going for protocol-dependent comparison we could've just checked ->i_fop instead; _that_ is the same for all protocol versions. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 89751ce21110..6f4983fc3937 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2569,7 +2569,7 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, unsigned long kflags = 0, kflags_out = 0; /* clone any lsm security options from the parent to the new sb */ - if (d_inode(mntroot)->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) + if (d_inode(mntroot)->i_fop != &nfs_dir_operations) return -ESTALE; if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) From patchwork Fri Sep 13 12:17:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144585 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A55D714E5 for ; Fri, 13 Sep 2019 12:18:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8437920CC7 for ; Fri, 13 Sep 2019 12:18:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387985AbfIMMSP (ORCPT ); Fri, 13 Sep 2019 08:18:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52398 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729746AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7508E307D853; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4017060920; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id EABC120D31; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 15/26] nfs: get rid of ->set_security() Date: Fri, 13 Sep 2019 08:17:37 -0400 Message-Id: <20190913121748.25391-16-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Al Viro it's always either nfs_set_sb_security() or nfs_clone_sb_security(), the choice being controlled by mount_info->cloned != NULL. No need to add methods, especially when both instances live right next to the caller and are never accessed anywhere else. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/internal.h | 3 -- fs/nfs/namespace.c | 1 - fs/nfs/nfs4super.c | 3 -- fs/nfs/super.c | 69 ++++++++++++++-------------------------------- 4 files changed, 21 insertions(+), 55 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index fa737e37f7c9..d512ec394559 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -145,7 +145,6 @@ struct nfs_mount_request { struct nfs_mount_info { unsigned int inherited_bsize; - int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; struct nfs_clone_mount *cloned; struct nfs_server *server; @@ -399,8 +398,6 @@ extern struct file_system_type nfs4_referral_fs_type; #endif bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); -int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); void nfs_kill_super(struct super_block *); diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 7bc5b9b8f5ea..72a99f9c7390 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -230,7 +230,6 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, }; struct nfs_mount_info mount_info = { .inherited_bsize = sb->s_blocksize_bits, - .set_security = nfs_clone_sb_security, .cloned = &mountdata, .mntfh = fh, .nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index d387c3c3b600..38f2eec7e1ad 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -201,8 +201,6 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_parsed_mount_data *data = mount_info->parsed; struct dentry *res; - mount_info->set_security = nfs_set_sb_security; - dfprintk(MOUNT, "--> nfs4_try_mount()\n"); res = do_nfs4_mount(nfs4_create_server(mount_info), @@ -224,7 +222,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, { struct nfs_clone_mount *data = raw_data; struct nfs_mount_info mount_info = { - .set_security = nfs_clone_sb_security, .cloned = data, .nfs_mod = &nfs_v4, }; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 6f4983fc3937..d8702e57f7fc 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2541,52 +2541,6 @@ static void nfs_get_cache_cookie(struct super_block *sb, } #endif -int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, - struct nfs_mount_info *mount_info) -{ - int error; - unsigned long kflags = 0, kflags_out = 0; - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) - kflags |= SECURITY_LSM_NATIVE_LABELS; - - error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, - kflags, &kflags_out); - if (error) - goto err; - - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && - !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) - NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; -err: - return error; -} -EXPORT_SYMBOL_GPL(nfs_set_sb_security); - -int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, - struct nfs_mount_info *mount_info) -{ - int error; - unsigned long kflags = 0, kflags_out = 0; - - /* clone any lsm security options from the parent to the new sb */ - if (d_inode(mntroot)->i_fop != &nfs_dir_operations) - return -ESTALE; - - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) - kflags |= SECURITY_LSM_NATIVE_LABELS; - - error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, - &kflags_out); - if (error) - return error; - - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && - !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) - NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; - return 0; -} -EXPORT_SYMBOL_GPL(nfs_clone_sb_security); - static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { @@ -2594,6 +2548,7 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct dentry *mntroot = ERR_PTR(-ENOMEM); int (*compare_super)(struct super_block *, void *) = nfs_compare_super; struct nfs_server *server = mount_info->server; + unsigned long kflags = 0, kflags_out = 0; struct nfs_sb_mountdata sb_mntdata = { .mntflags = flags, .server = server, @@ -2654,7 +2609,26 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, if (IS_ERR(mntroot)) goto error_splat_super; - error = mount_info->set_security(s, mntroot, mount_info); + + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) + kflags |= SECURITY_LSM_NATIVE_LABELS; + if (mount_info->cloned) { + if (d_inode(mntroot)->i_fop != &nfs_dir_operations) { + error = -ESTALE; + goto error_splat_root; + } + /* clone any lsm security options from the parent to the new sb */ + error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, + &kflags_out); + } else { + error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, + kflags, &kflags_out); + } + if (error) + goto error_splat_root; + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && + !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) + NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; if (error) goto error_splat_root; @@ -2679,7 +2653,6 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_mount_info mount_info = { - .set_security = nfs_set_sb_security, }; struct dentry *mntroot = ERR_PTR(-ENOMEM); struct nfs_subversion *nfs_mod; From patchwork Fri Sep 13 12:17:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144589 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6057716C1 for ; Fri, 13 Sep 2019 12:18:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2A403214DA for ; Fri, 13 Sep 2019 12:18:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388117AbfIMMSV (ORCPT ); Fri, 13 Sep 2019 08:18:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52396 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729704AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5FD3F307D847; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 14CB21001959; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id F1C6320D3F; Fri, 13 Sep 2019 08:17:48 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 16/26] NFS: Move mount parameterisation bits into their own file Date: Fri, 13 Sep 2019 08:17:38 -0400 Message-Id: <20190913121748.25391-17-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Split various bits relating to mount parameterisation out from fs/nfs/super.c into their own file to form the basis of filesystem context handling for NFS. No other changes are made to the code beyond removing 'static' qualifiers. Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/Makefile | 2 +- fs/nfs/fs_context.c | 1414 +++++++++++++++++++++++++++++++++++++++++++ fs/nfs/internal.h | 29 + fs/nfs/super.c | 1411 ------------------------------------------ 4 files changed, 1444 insertions(+), 1412 deletions(-) create mode 100644 fs/nfs/fs_context.c diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile index 34cdeaecccf6..2433c3e03cfa 100644 --- a/fs/nfs/Makefile +++ b/fs/nfs/Makefile @@ -9,7 +9,7 @@ CFLAGS_nfstrace.o += -I$(src) nfs-y := client.o dir.o file.o getroot.o inode.o super.o \ io.o direct.o pagelist.o read.o symlink.o unlink.o \ write.o namespace.o mount_clnt.o nfstrace.o \ - export.o sysfs.o + export.o sysfs.o fs_context.o nfs-$(CONFIG_ROOT_NFS) += nfsroot.o nfs-$(CONFIG_SYSCTL) += sysctl.o nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c new file mode 100644 index 000000000000..3a34c8437917 --- /dev/null +++ b/fs/nfs/fs_context.c @@ -0,0 +1,1414 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/fs/nfs/fs_context.c + * + * Copyright (C) 1992 Rick Sladkey + * + * NFS mount handling. + * + * Split from fs/nfs/super.c by David Howells + */ + +#include +#include +#include +#include +#include +#include +#include "nfs.h" +#include "internal.h" + +#define NFSDBG_FACILITY NFSDBG_MOUNT + +#if IS_ENABLED(CONFIG_NFS_V3) +#define NFS_DEFAULT_VERSION 3 +#else +#define NFS_DEFAULT_VERSION 2 +#endif + +#define NFS_MAX_CONNECTIONS 16 + +enum { + /* Mount options that take no arguments */ + Opt_soft, Opt_softerr, Opt_hard, + Opt_posix, Opt_noposix, + Opt_cto, Opt_nocto, + Opt_ac, Opt_noac, + Opt_lock, Opt_nolock, + Opt_udp, Opt_tcp, Opt_rdma, + Opt_acl, Opt_noacl, + Opt_rdirplus, Opt_nordirplus, + Opt_sharecache, Opt_nosharecache, + Opt_resvport, Opt_noresvport, + Opt_fscache, Opt_nofscache, + Opt_migration, Opt_nomigration, + + /* Mount options that take integer arguments */ + Opt_port, + Opt_rsize, Opt_wsize, Opt_bsize, + Opt_timeo, Opt_retrans, + Opt_acregmin, Opt_acregmax, + Opt_acdirmin, Opt_acdirmax, + Opt_actimeo, + Opt_namelen, + Opt_mountport, + Opt_mountvers, + Opt_minorversion, + + /* Mount options that take string arguments */ + Opt_nfsvers, + Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, + Opt_addr, Opt_mountaddr, Opt_clientaddr, + Opt_nconnect, + Opt_lookupcache, + Opt_fscache_uniq, + Opt_local_lock, + + /* Special mount options */ + Opt_userspace, Opt_deprecated, Opt_sloppy, + + Opt_err +}; + +static const match_table_t nfs_mount_option_tokens = { + { Opt_userspace, "bg" }, + { Opt_userspace, "fg" }, + { Opt_userspace, "retry=%s" }, + + { Opt_sloppy, "sloppy" }, + + { Opt_soft, "soft" }, + { Opt_softerr, "softerr" }, + { Opt_hard, "hard" }, + { Opt_deprecated, "intr" }, + { Opt_deprecated, "nointr" }, + { Opt_posix, "posix" }, + { Opt_noposix, "noposix" }, + { Opt_cto, "cto" }, + { Opt_nocto, "nocto" }, + { Opt_ac, "ac" }, + { Opt_noac, "noac" }, + { Opt_lock, "lock" }, + { Opt_nolock, "nolock" }, + { Opt_udp, "udp" }, + { Opt_tcp, "tcp" }, + { Opt_rdma, "rdma" }, + { Opt_acl, "acl" }, + { Opt_noacl, "noacl" }, + { Opt_rdirplus, "rdirplus" }, + { Opt_nordirplus, "nordirplus" }, + { Opt_sharecache, "sharecache" }, + { Opt_nosharecache, "nosharecache" }, + { Opt_resvport, "resvport" }, + { Opt_noresvport, "noresvport" }, + { Opt_fscache, "fsc" }, + { Opt_nofscache, "nofsc" }, + { Opt_migration, "migration" }, + { Opt_nomigration, "nomigration" }, + + { Opt_port, "port=%s" }, + { Opt_rsize, "rsize=%s" }, + { Opt_wsize, "wsize=%s" }, + { Opt_bsize, "bsize=%s" }, + { Opt_timeo, "timeo=%s" }, + { Opt_retrans, "retrans=%s" }, + { Opt_acregmin, "acregmin=%s" }, + { Opt_acregmax, "acregmax=%s" }, + { Opt_acdirmin, "acdirmin=%s" }, + { Opt_acdirmax, "acdirmax=%s" }, + { Opt_actimeo, "actimeo=%s" }, + { Opt_namelen, "namlen=%s" }, + { Opt_mountport, "mountport=%s" }, + { Opt_mountvers, "mountvers=%s" }, + { Opt_minorversion, "minorversion=%s" }, + + { Opt_nfsvers, "nfsvers=%s" }, + { Opt_nfsvers, "vers=%s" }, + + { Opt_sec, "sec=%s" }, + { Opt_proto, "proto=%s" }, + { Opt_mountproto, "mountproto=%s" }, + { Opt_addr, "addr=%s" }, + { Opt_clientaddr, "clientaddr=%s" }, + { Opt_mounthost, "mounthost=%s" }, + { Opt_mountaddr, "mountaddr=%s" }, + + { Opt_nconnect, "nconnect=%s" }, + + { Opt_lookupcache, "lookupcache=%s" }, + { Opt_fscache_uniq, "fsc=%s" }, + { Opt_local_lock, "local_lock=%s" }, + + /* The following needs to be listed after all other options */ + { Opt_nfsvers, "v%s" }, + + { Opt_err, NULL } +}; + +enum { + Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, + Opt_xprt_rdma6, + + Opt_xprt_err +}; + +static const match_table_t nfs_xprt_protocol_tokens = { + { Opt_xprt_udp, "udp" }, + { Opt_xprt_udp6, "udp6" }, + { Opt_xprt_tcp, "tcp" }, + { Opt_xprt_tcp6, "tcp6" }, + { Opt_xprt_rdma, "rdma" }, + { Opt_xprt_rdma6, "rdma6" }, + + { Opt_xprt_err, NULL } +}; + +enum { + Opt_sec_none, Opt_sec_sys, + Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, + Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, + Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, + + Opt_sec_err +}; + +static const match_table_t nfs_secflavor_tokens = { + { Opt_sec_none, "none" }, + { Opt_sec_none, "null" }, + { Opt_sec_sys, "sys" }, + + { Opt_sec_krb5, "krb5" }, + { Opt_sec_krb5i, "krb5i" }, + { Opt_sec_krb5p, "krb5p" }, + + { Opt_sec_lkey, "lkey" }, + { Opt_sec_lkeyi, "lkeyi" }, + { Opt_sec_lkeyp, "lkeyp" }, + + { Opt_sec_spkm, "spkm3" }, + { Opt_sec_spkmi, "spkm3i" }, + { Opt_sec_spkmp, "spkm3p" }, + + { Opt_sec_err, NULL } +}; + +enum { + Opt_lookupcache_all, Opt_lookupcache_positive, + Opt_lookupcache_none, + + Opt_lookupcache_err +}; + +static match_table_t nfs_lookupcache_tokens = { + { Opt_lookupcache_all, "all" }, + { Opt_lookupcache_positive, "pos" }, + { Opt_lookupcache_positive, "positive" }, + { Opt_lookupcache_none, "none" }, + + { Opt_lookupcache_err, NULL } +}; + +enum { + Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, + Opt_local_lock_none, + + Opt_local_lock_err +}; + +static match_table_t nfs_local_lock_tokens = { + { Opt_local_lock_all, "all" }, + { Opt_local_lock_flock, "flock" }, + { Opt_local_lock_posix, "posix" }, + { Opt_local_lock_none, "none" }, + + { Opt_local_lock_err, NULL } +}; + +enum { + Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, + Opt_vers_4_1, Opt_vers_4_2, + + Opt_vers_err +}; + +static match_table_t nfs_vers_tokens = { + { Opt_vers_2, "2" }, + { Opt_vers_3, "3" }, + { Opt_vers_4, "4" }, + { Opt_vers_4_0, "4.0" }, + { Opt_vers_4_1, "4.1" }, + { Opt_vers_4_2, "4.2" }, + + { Opt_vers_err, NULL } +}; + +struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) +{ + struct nfs_parsed_mount_data *data; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data) { + data->timeo = NFS_UNSPEC_TIMEO; + data->retrans = NFS_UNSPEC_RETRANS; + data->acregmin = NFS_DEF_ACREGMIN; + data->acregmax = NFS_DEF_ACREGMAX; + data->acdirmin = NFS_DEF_ACDIRMIN; + data->acdirmax = NFS_DEF_ACDIRMAX; + data->mount_server.port = NFS_UNSPEC_PORT; + data->nfs_server.port = NFS_UNSPEC_PORT; + data->nfs_server.protocol = XPRT_TRANSPORT_TCP; + data->selected_flavor = RPC_AUTH_MAXFLAVOR; + data->minorversion = 0; + data->need_mount = true; + data->net = current->nsproxy->net_ns; + data->lsm_opts = NULL; + } + return data; +} + +void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) +{ + if (data) { + kfree(data->client_address); + kfree(data->mount_server.hostname); + kfree(data->nfs_server.export_path); + kfree(data->nfs_server.hostname); + kfree(data->fscache_uniq); + security_free_mnt_opts(&data->lsm_opts); + kfree(data); + } +} + +/* + * Sanity-check a server address provided by the mount command. + * + * Address family must be initialized, and address must not be + * the ANY address for that family. + */ +static int nfs_verify_server_address(struct sockaddr *addr) +{ + switch (addr->sa_family) { + case AF_INET: { + struct sockaddr_in *sa = (struct sockaddr_in *)addr; + return sa->sin_addr.s_addr != htonl(INADDR_ANY); + } + case AF_INET6: { + struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; + return !ipv6_addr_any(sa); + } + } + + dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); + return 0; +} + +/* + * Sanity check the NFS transport protocol. + * + */ +static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) +{ + switch (mnt->nfs_server.protocol) { + case XPRT_TRANSPORT_UDP: + case XPRT_TRANSPORT_TCP: + case XPRT_TRANSPORT_RDMA: + break; + default: + mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + } +} + +/* + * For text based NFSv2/v3 mounts, the mount protocol transport default + * settings should depend upon the specified NFS transport. + */ +static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) +{ + nfs_validate_transport_protocol(mnt); + + if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || + mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) + return; + switch (mnt->nfs_server.protocol) { + case XPRT_TRANSPORT_UDP: + mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + break; + case XPRT_TRANSPORT_TCP: + case XPRT_TRANSPORT_RDMA: + mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + } +} + +/* + * Add 'flavor' to 'auth_info' if not already present. + * Returns true if 'flavor' ends up in the list, false otherwise + */ +static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, + rpc_authflavor_t flavor) +{ + unsigned int i; + unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); + + /* make sure this flavor isn't already in the list */ + for (i = 0; i < auth_info->flavor_len; i++) { + if (flavor == auth_info->flavors[i]) + return true; + } + + if (auth_info->flavor_len + 1 >= max_flavor_len) { + dfprintk(MOUNT, "NFS: too many sec= flavors\n"); + return false; + } + + auth_info->flavors[auth_info->flavor_len++] = flavor; + return true; +} + +/* + * Parse the value of the 'sec=' option. + */ +static int nfs_parse_security_flavors(char *value, + struct nfs_parsed_mount_data *mnt) +{ + substring_t args[MAX_OPT_ARGS]; + rpc_authflavor_t pseudoflavor; + char *p; + + dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); + + while ((p = strsep(&value, ":")) != NULL) { + switch (match_token(p, nfs_secflavor_tokens, args)) { + case Opt_sec_none: + pseudoflavor = RPC_AUTH_NULL; + break; + case Opt_sec_sys: + pseudoflavor = RPC_AUTH_UNIX; + break; + case Opt_sec_krb5: + pseudoflavor = RPC_AUTH_GSS_KRB5; + break; + case Opt_sec_krb5i: + pseudoflavor = RPC_AUTH_GSS_KRB5I; + break; + case Opt_sec_krb5p: + pseudoflavor = RPC_AUTH_GSS_KRB5P; + break; + case Opt_sec_lkey: + pseudoflavor = RPC_AUTH_GSS_LKEY; + break; + case Opt_sec_lkeyi: + pseudoflavor = RPC_AUTH_GSS_LKEYI; + break; + case Opt_sec_lkeyp: + pseudoflavor = RPC_AUTH_GSS_LKEYP; + break; + case Opt_sec_spkm: + pseudoflavor = RPC_AUTH_GSS_SPKM; + break; + case Opt_sec_spkmi: + pseudoflavor = RPC_AUTH_GSS_SPKMI; + break; + case Opt_sec_spkmp: + pseudoflavor = RPC_AUTH_GSS_SPKMP; + break; + default: + dfprintk(MOUNT, + "NFS: sec= option '%s' not recognized\n", p); + return 0; + } + + if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) + return 0; + } + + return 1; +} + +static int nfs_parse_version_string(char *string, + struct nfs_parsed_mount_data *mnt, + substring_t *args) +{ + mnt->flags &= ~NFS_MOUNT_VER3; + switch (match_token(string, nfs_vers_tokens, args)) { + case Opt_vers_2: + mnt->version = 2; + break; + case Opt_vers_3: + mnt->flags |= NFS_MOUNT_VER3; + mnt->version = 3; + break; + case Opt_vers_4: + /* Backward compatibility option. In future, + * the mount program should always supply + * a NFSv4 minor version number. + */ + mnt->version = 4; + break; + case Opt_vers_4_0: + mnt->version = 4; + mnt->minorversion = 0; + break; + case Opt_vers_4_1: + mnt->version = 4; + mnt->minorversion = 1; + break; + case Opt_vers_4_2: + mnt->version = 4; + mnt->minorversion = 2; + break; + default: + return 0; + } + return 1; +} + +static int nfs_get_option_str(substring_t args[], char **option) +{ + kfree(*option); + *option = match_strdup(args); + return !*option; +} + +static int nfs_get_option_ul(substring_t args[], unsigned long *option) +{ + int rc; + char *string; + + string = match_strdup(args); + if (string == NULL) + return -ENOMEM; + rc = kstrtoul(string, 10, option); + kfree(string); + + return rc; +} + +static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, + unsigned long l_bound, unsigned long u_bound) +{ + int ret; + + ret = nfs_get_option_ul(args, option); + if (ret != 0) + return ret; + if (*option < l_bound || *option > u_bound) + return -ERANGE; + return 0; +} + +/* + * Error-check and convert a string of mount options from user space into + * a data structure. The whole mount string is processed; bad options are + * skipped as they are encountered. If there were no errors, return 1; + * otherwise return 0 (zero). + */ +int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) +{ + char *p, *string; + int rc, sloppy = 0, invalid_option = 0; + unsigned short protofamily = AF_UNSPEC; + unsigned short mountfamily = AF_UNSPEC; + + if (!raw) { + dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); + return 1; + } + dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); + + rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); + if (rc) + goto out_security_failure; + + while ((p = strsep(&raw, ",")) != NULL) { + substring_t args[MAX_OPT_ARGS]; + unsigned long option; + int token; + + if (!*p) + continue; + + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + + token = match_token(p, nfs_mount_option_tokens, args); + switch (token) { + + /* + * boolean options: foo/nofoo + */ + case Opt_soft: + mnt->flags |= NFS_MOUNT_SOFT; + mnt->flags &= ~NFS_MOUNT_SOFTERR; + break; + case Opt_softerr: + mnt->flags |= NFS_MOUNT_SOFTERR; + mnt->flags &= ~NFS_MOUNT_SOFT; + break; + case Opt_hard: + mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + break; + case Opt_posix: + mnt->flags |= NFS_MOUNT_POSIX; + break; + case Opt_noposix: + mnt->flags &= ~NFS_MOUNT_POSIX; + break; + case Opt_cto: + mnt->flags &= ~NFS_MOUNT_NOCTO; + break; + case Opt_nocto: + mnt->flags |= NFS_MOUNT_NOCTO; + break; + case Opt_ac: + mnt->flags &= ~NFS_MOUNT_NOAC; + break; + case Opt_noac: + mnt->flags |= NFS_MOUNT_NOAC; + break; + case Opt_lock: + mnt->flags &= ~NFS_MOUNT_NONLM; + mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_nolock: + mnt->flags |= NFS_MOUNT_NONLM; + mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_udp: + mnt->flags &= ~NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_tcp: + mnt->flags |= NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_rdma: + mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ + mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(p); + break; + case Opt_acl: + mnt->flags &= ~NFS_MOUNT_NOACL; + break; + case Opt_noacl: + mnt->flags |= NFS_MOUNT_NOACL; + break; + case Opt_rdirplus: + mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; + break; + case Opt_nordirplus: + mnt->flags |= NFS_MOUNT_NORDIRPLUS; + break; + case Opt_sharecache: + mnt->flags &= ~NFS_MOUNT_UNSHARED; + break; + case Opt_nosharecache: + mnt->flags |= NFS_MOUNT_UNSHARED; + break; + case Opt_resvport: + mnt->flags &= ~NFS_MOUNT_NORESVPORT; + break; + case Opt_noresvport: + mnt->flags |= NFS_MOUNT_NORESVPORT; + break; + case Opt_fscache: + mnt->options |= NFS_OPTION_FSCACHE; + kfree(mnt->fscache_uniq); + mnt->fscache_uniq = NULL; + break; + case Opt_nofscache: + mnt->options &= ~NFS_OPTION_FSCACHE; + kfree(mnt->fscache_uniq); + mnt->fscache_uniq = NULL; + break; + case Opt_migration: + mnt->options |= NFS_OPTION_MIGRATION; + break; + case Opt_nomigration: + mnt->options &= ~NFS_OPTION_MIGRATION; + break; + + /* + * options that take numeric values + */ + case Opt_port: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + mnt->nfs_server.port = option; + break; + case Opt_rsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->rsize = option; + break; + case Opt_wsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->wsize = option; + break; + case Opt_bsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->bsize = option; + break; + case Opt_timeo: + if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) + goto out_invalid_value; + mnt->timeo = option; + break; + case Opt_retrans: + if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) + goto out_invalid_value; + mnt->retrans = option; + break; + case Opt_acregmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acregmin = option; + break; + case Opt_acregmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acregmax = option; + break; + case Opt_acdirmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acdirmin = option; + break; + case Opt_acdirmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acdirmax = option; + break; + case Opt_actimeo: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acregmin = mnt->acregmax = + mnt->acdirmin = mnt->acdirmax = option; + break; + case Opt_namelen: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->namlen = option; + break; + case Opt_mountport: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + mnt->mount_server.port = option; + break; + case Opt_mountvers: + if (nfs_get_option_ul(args, &option) || + option < NFS_MNT_VERSION || + option > NFS_MNT3_VERSION) + goto out_invalid_value; + mnt->mount_server.version = option; + break; + case Opt_minorversion: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + if (option > NFS4_MAX_MINOR_VERSION) + goto out_invalid_value; + mnt->minorversion = option; + break; + + /* + * options that take text values + */ + case Opt_nfsvers: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_version_string(string, mnt, args); + kfree(string); + if (!rc) + goto out_invalid_value; + break; + case Opt_sec: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_security_flavors(string, mnt); + kfree(string); + if (!rc) { + dfprintk(MOUNT, "NFS: unrecognized " + "security flavor\n"); + return 0; + } + break; + case Opt_proto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + + protofamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + mnt->flags &= ~NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_xprt_tcp6: + protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + mnt->flags |= NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_xprt_rdma6: + protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_rdma: + /* vector side protocols to TCP */ + mnt->flags |= NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(string); + break; + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); + kfree(string); + return 0; + } + kfree(string); + break; + case Opt_mountproto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + kfree(string); + + mountfamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_xprt_tcp6: + mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_xprt_rdma: /* not used for side protocols */ + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); + return 0; + } + break; + case Opt_addr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + mnt->nfs_server.addrlen = + rpc_pton(mnt->net, string, strlen(string), + (struct sockaddr *) + &mnt->nfs_server.address, + sizeof(mnt->nfs_server.address)); + kfree(string); + if (mnt->nfs_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_clientaddr: + if (nfs_get_option_str(args, &mnt->client_address)) + goto out_nomem; + break; + case Opt_mounthost: + if (nfs_get_option_str(args, + &mnt->mount_server.hostname)) + goto out_nomem; + break; + case Opt_mountaddr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + mnt->mount_server.addrlen = + rpc_pton(mnt->net, string, strlen(string), + (struct sockaddr *) + &mnt->mount_server.address, + sizeof(mnt->mount_server.address)); + kfree(string); + if (mnt->mount_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_nconnect: + if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) + goto out_invalid_value; + mnt->nfs_server.nconnect = option; + break; + case Opt_lookupcache: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_lookupcache_tokens, args); + kfree(string); + switch (token) { + case Opt_lookupcache_all: + mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); + break; + case Opt_lookupcache_positive: + mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; + break; + case Opt_lookupcache_none: + mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; + break; + default: + dfprintk(MOUNT, "NFS: invalid " + "lookupcache argument\n"); + return 0; + }; + break; + case Opt_fscache_uniq: + if (nfs_get_option_str(args, &mnt->fscache_uniq)) + goto out_nomem; + mnt->options |= NFS_OPTION_FSCACHE; + break; + case Opt_local_lock: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, nfs_local_lock_tokens, + args); + kfree(string); + switch (token) { + case Opt_local_lock_all: + mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_local_lock_flock: + mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; + break; + case Opt_local_lock_posix: + mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; + break; + case Opt_local_lock_none: + mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + default: + dfprintk(MOUNT, "NFS: invalid " + "local_lock argument\n"); + return 0; + }; + break; + + /* + * Special options + */ + case Opt_sloppy: + sloppy = 1; + dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); + break; + case Opt_userspace: + case Opt_deprecated: + dfprintk(MOUNT, "NFS: ignoring mount option " + "'%s'\n", p); + break; + + default: + invalid_option = 1; + dfprintk(MOUNT, "NFS: unrecognized mount option " + "'%s'\n", p); + } + } + + if (!sloppy && invalid_option) + return 0; + + if (mnt->minorversion && mnt->version != 4) + goto out_minorversion_mismatch; + + if (mnt->options & NFS_OPTION_MIGRATION && + (mnt->version != 4 || mnt->minorversion != 0)) + goto out_migration_misuse; + + /* + * verify that any proto=/mountproto= options match the address + * families in the addr=/mountaddr= options. + */ + if (protofamily != AF_UNSPEC && + protofamily != mnt->nfs_server.address.ss_family) + goto out_proto_mismatch; + + if (mountfamily != AF_UNSPEC) { + if (mnt->mount_server.addrlen) { + if (mountfamily != mnt->mount_server.address.ss_family) + goto out_mountproto_mismatch; + } else { + if (mountfamily != mnt->nfs_server.address.ss_family) + goto out_mountproto_mismatch; + } + } + + return 1; + +out_mountproto_mismatch: + printk(KERN_INFO "NFS: mount server address does not match mountproto= " + "option\n"); + return 0; +out_proto_mismatch: + printk(KERN_INFO "NFS: server address does not match proto= option\n"); + return 0; +out_invalid_address: + printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); + return 0; +out_invalid_value: + printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + return 0; +out_minorversion_mismatch: + printk(KERN_INFO "NFS: mount option vers=%u does not support " + "minorversion=%u\n", mnt->version, mnt->minorversion); + return 0; +out_migration_misuse: + printk(KERN_INFO + "NFS: 'migration' not supported for this NFS version\n"); + return 0; +out_nomem: + printk(KERN_INFO "NFS: not enough memory to parse option\n"); + return 0; +out_security_failure: + printk(KERN_INFO "NFS: security options invalid: %d\n", rc); + return 0; +} + +/* + * Split "dev_name" into "hostname:export_path". + * + * The leftmost colon demarks the split between the server's hostname + * and the export path. If the hostname starts with a left square + * bracket, then it may contain colons. + * + * Note: caller frees hostname and export path, even on error. + */ +static int nfs_parse_devname(const char *dev_name, + char **hostname, size_t maxnamlen, + char **export_path, size_t maxpathlen) +{ + size_t len; + char *end; + + if (unlikely(!dev_name || !*dev_name)) { + dfprintk(MOUNT, "NFS: device name not specified\n"); + return -EINVAL; + } + + /* Is the host name protected with square brakcets? */ + if (*dev_name == '[') { + end = strchr(++dev_name, ']'); + if (end == NULL || end[1] != ':') + goto out_bad_devname; + + len = end - dev_name; + end++; + } else { + char *comma; + + end = strchr(dev_name, ':'); + if (end == NULL) + goto out_bad_devname; + len = end - dev_name; + + /* kill possible hostname list: not supported */ + comma = strchr(dev_name, ','); + if (comma != NULL && comma < end) + len = comma - dev_name; + } + + if (len > maxnamlen) + goto out_hostname; + + /* N.B. caller will free nfs_server.hostname in all cases */ + *hostname = kstrndup(dev_name, len, GFP_KERNEL); + if (*hostname == NULL) + goto out_nomem; + len = strlen(++end); + if (len > maxpathlen) + goto out_path; + *export_path = kstrndup(end, len, GFP_KERNEL); + if (!*export_path) + goto out_nomem; + + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); + return 0; + +out_bad_devname: + dfprintk(MOUNT, "NFS: device name not in host:path format\n"); + return -EINVAL; + +out_nomem: + dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); + return -ENOMEM; + +out_hostname: + dfprintk(MOUNT, "NFS: server hostname too long\n"); + return -ENAMETOOLONG; + +out_path: + dfprintk(MOUNT, "NFS: export pathname too long\n"); + return -ENAMETOOLONG; +} + +/* + * Validate the NFS2/NFS3 mount data + * - fills in the mount root filehandle + * + * For option strings, user space handles the following behaviors: + * + * + DNS: mapping server host name to IP address ("addr=" option) + * + * + failure mode: how to behave if a mount request can't be handled + * immediately ("fg/bg" option) + * + * + retry: how often to retry a mount request ("retry=" option) + * + * + breaking back: trying proto=udp after proto=tcp, v2 after v3, + * mountproto=tcp after mountproto=udp, and so on + */ +static int nfs23_validate_mount_data(void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + struct nfs_mount_data *data = (struct nfs_mount_data *)options; + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; + + if (data == NULL) + goto out_no_data; + + args->version = NFS_DEFAULT_VERSION; + switch (data->version) { + case 1: + data->namlen = 0; /* fall through */ + case 2: + data->bsize = 0; /* fall through */ + case 3: + if (data->flags & NFS_MOUNT_VER3) + goto out_no_v3; + data->root.size = NFS2_FHSIZE; + memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); + /* Turn off security negotiation */ + extra_flags |= NFS_MOUNT_SECFLAVOUR; + /* fall through */ + case 4: + if (data->flags & NFS_MOUNT_SECFLAVOUR) + goto out_no_sec; + /* fall through */ + case 5: + memset(data->context, 0, sizeof(data->context)); + /* fall through */ + case 6: + if (data->flags & NFS_MOUNT_VER3) { + if (data->root.size > NFS3_FHSIZE || data->root.size == 0) + goto out_invalid_fh; + mntfh->size = data->root.size; + args->version = 3; + } else { + mntfh->size = NFS2_FHSIZE; + args->version = 2; + } + + + memcpy(mntfh->data, data->root.data, mntfh->size); + if (mntfh->size < sizeof(mntfh->data)) + memset(mntfh->data + mntfh->size, 0, + sizeof(mntfh->data) - mntfh->size); + + /* + * Translate to nfs_parsed_mount_data, which nfs_fill_super + * can deal with. + */ + args->flags = data->flags & NFS_MOUNT_FLAGMASK; + args->flags |= extra_flags; + args->rsize = data->rsize; + args->wsize = data->wsize; + args->timeo = data->timeo; + args->retrans = data->retrans; + args->acregmin = data->acregmin; + args->acregmax = data->acregmax; + args->acdirmin = data->acdirmin; + args->acdirmax = data->acdirmax; + args->need_mount = false; + + memcpy(sap, &data->addr, sizeof(data->addr)); + args->nfs_server.addrlen = sizeof(data->addr); + args->nfs_server.port = ntohs(data->addr.sin_port); + if (sap->sa_family != AF_INET || + !nfs_verify_server_address(sap)) + goto out_no_address; + + if (!(data->flags & NFS_MOUNT_TCP)) + args->nfs_server.protocol = XPRT_TRANSPORT_UDP; + /* N.B. caller will free nfs_server.hostname in all cases */ + args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); + args->namlen = data->namlen; + args->bsize = data->bsize; + + if (data->flags & NFS_MOUNT_SECFLAVOUR) + args->selected_flavor = data->pseudoflavor; + else + args->selected_flavor = RPC_AUTH_UNIX; + if (!args->nfs_server.hostname) + goto out_nomem; + + if (!(data->flags & NFS_MOUNT_NONLM)) + args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| + NFS_MOUNT_LOCAL_FCNTL); + else + args->flags |= (NFS_MOUNT_LOCAL_FLOCK| + NFS_MOUNT_LOCAL_FCNTL); + /* + * The legacy version 6 binary mount data from userspace has a + * field used only to transport selinux information into the + * the kernel. To continue to support that functionality we + * have a touch of selinux knowledge here in the NFS code. The + * userspace code converted context=blah to just blah so we are + * converting back to the full string selinux understands. + */ + if (data->context[0]){ +#ifdef CONFIG_SECURITY_SELINUX + int rc; + data->context[NFS_MAX_CONTEXT_LEN] = '\0'; + rc = security_add_mnt_opt("context", data->context, + strlen(data->context), &args->lsm_opts); + if (rc) + return rc; +#else + return -EINVAL; +#endif + } + + break; + default: + return NFS_TEXT_DATA; + } + + return 0; + +out_no_data: + dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); + return -EINVAL; + +out_no_v3: + dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", + data->version); + return -EINVAL; + +out_no_sec: + dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); + return -EINVAL; + +out_nomem: + dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); + return -ENOMEM; + +out_no_address: + dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); + return -EINVAL; + +out_invalid_fh: + dfprintk(MOUNT, "NFS: invalid root filehandle\n"); + return -EINVAL; +} + +#if IS_ENABLED(CONFIG_NFS_V4) + +static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) +{ + args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| + NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); +} + +/* + * Validate NFSv4 mount options + */ +static int nfs4_validate_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name) +{ + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; + char *c; + + if (data == NULL) + goto out_no_data; + + args->version = 4; + + switch (data->version) { + case 1: + if (data->host_addrlen > sizeof(args->nfs_server.address)) + goto out_no_address; + if (data->host_addrlen == 0) + goto out_no_address; + args->nfs_server.addrlen = data->host_addrlen; + if (copy_from_user(sap, data->host_addr, data->host_addrlen)) + return -EFAULT; + if (!nfs_verify_server_address(sap)) + goto out_no_address; + args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); + + if (data->auth_flavourlen) { + rpc_authflavor_t pseudoflavor; + if (data->auth_flavourlen > 1) + goto out_inval_auth; + if (copy_from_user(&pseudoflavor, + data->auth_flavours, + sizeof(pseudoflavor))) + return -EFAULT; + args->selected_flavor = pseudoflavor; + } else + args->selected_flavor = RPC_AUTH_UNIX; + + c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); + if (IS_ERR(c)) + return PTR_ERR(c); + args->nfs_server.hostname = c; + + c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); + if (IS_ERR(c)) + return PTR_ERR(c); + args->nfs_server.export_path = c; + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); + + c = strndup_user(data->client_addr.data, 16); + if (IS_ERR(c)) + return PTR_ERR(c); + args->client_address = c; + + /* + * Translate to nfs_parsed_mount_data, which nfs4_fill_super + * can deal with. + */ + + args->flags = data->flags & NFS4_MOUNT_FLAGMASK; + args->rsize = data->rsize; + args->wsize = data->wsize; + args->timeo = data->timeo; + args->retrans = data->retrans; + args->acregmin = data->acregmin; + args->acregmax = data->acregmax; + args->acdirmin = data->acdirmin; + args->acdirmax = data->acdirmax; + args->nfs_server.protocol = data->proto; + nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + + break; + default: + return NFS_TEXT_DATA; + } + + return 0; + +out_no_data: + dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); + return -EINVAL; + +out_inval_auth: + dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", + data->auth_flavourlen); + return -EINVAL; + +out_no_address: + dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); + return -EINVAL; + +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; +} + +int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + if (fs_type == &nfs_fs_type) + return nfs23_validate_mount_data(options, args, mntfh, dev_name); + return nfs4_validate_mount_data(options, args, dev_name); +} +#else +int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + return nfs23_validate_mount_data(options, args, mntfh, dev_name); +} +#endif + +int nfs_validate_text_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name) +{ + int port = 0; + int max_namelen = PAGE_SIZE; + int max_pathlen = NFS_MAXPATHLEN; + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + + if (nfs_parse_mount_options((char *)options, args) == 0) + return -EINVAL; + + if (!nfs_verify_server_address(sap)) + goto out_no_address; + + if (args->version == 4) { +#if IS_ENABLED(CONFIG_NFS_V4) + if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + else + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + nfs4_validate_mount_flags(args); +#else + goto out_v4_not_compiled; +#endif /* CONFIG_NFS_V4 */ + } else { + nfs_set_mount_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + } + + nfs_set_port(sap, &args->nfs_server.port, port); + + return nfs_parse_devname(dev_name, + &args->nfs_server.hostname, + max_namelen, + &args->nfs_server.export_path, + max_pathlen); + +#if !IS_ENABLED(CONFIG_NFS_V4) +out_v4_not_compiled: + dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); + return -EPROTONOSUPPORT; +#else +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; +#endif /* !CONFIG_NFS_V4 */ + +out_no_address: + dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); + return -EINVAL; +} diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index d512ec394559..b66fd35993b3 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -7,6 +7,7 @@ #include #include #include +#include #include #include @@ -232,6 +233,22 @@ extern const struct svc_version nfs4_callback_version1; extern const struct svc_version nfs4_callback_version4; struct nfs_pageio_descriptor; + +/* mount.c */ +#define NFS_TEXT_DATA 1 + +extern struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void); +extern void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data); +extern int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt); +extern int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name); +extern int nfs_validate_text_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name); + /* pagelist.c */ extern int __init nfs_init_nfspagecache(void); extern void nfs_destroy_nfspagecache(void); @@ -763,3 +780,15 @@ static inline bool nfs_error_is_fatal(int err) } } +/* + * Select between a default port value and a user-specified port value. + * If a zero value is set, then autobind will be used. + */ +static inline void nfs_set_port(struct sockaddr *sap, int *port, + const unsigned short default_port) +{ + if (*port == NFS_UNSPEC_PORT) + *port = default_port; + + rpc_set_port(sap, *port); +} diff --git a/fs/nfs/super.c b/fs/nfs/super.c index d8702e57f7fc..886220d2da4e 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -69,229 +69,6 @@ #include "nfs.h" #define NFSDBG_FACILITY NFSDBG_VFS -#define NFS_TEXT_DATA 1 - -#if IS_ENABLED(CONFIG_NFS_V3) -#define NFS_DEFAULT_VERSION 3 -#else -#define NFS_DEFAULT_VERSION 2 -#endif - -#define NFS_MAX_CONNECTIONS 16 - -enum { - /* Mount options that take no arguments */ - Opt_soft, Opt_softerr, Opt_hard, - Opt_posix, Opt_noposix, - Opt_cto, Opt_nocto, - Opt_ac, Opt_noac, - Opt_lock, Opt_nolock, - Opt_udp, Opt_tcp, Opt_rdma, - Opt_acl, Opt_noacl, - Opt_rdirplus, Opt_nordirplus, - Opt_sharecache, Opt_nosharecache, - Opt_resvport, Opt_noresvport, - Opt_fscache, Opt_nofscache, - Opt_migration, Opt_nomigration, - - /* Mount options that take integer arguments */ - Opt_port, - Opt_rsize, Opt_wsize, Opt_bsize, - Opt_timeo, Opt_retrans, - Opt_acregmin, Opt_acregmax, - Opt_acdirmin, Opt_acdirmax, - Opt_actimeo, - Opt_namelen, - Opt_mountport, - Opt_mountvers, - Opt_minorversion, - - /* Mount options that take string arguments */ - Opt_nfsvers, - Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, - Opt_addr, Opt_mountaddr, Opt_clientaddr, - Opt_nconnect, - Opt_lookupcache, - Opt_fscache_uniq, - Opt_local_lock, - - /* Special mount options */ - Opt_userspace, Opt_deprecated, Opt_sloppy, - - Opt_err -}; - -static const match_table_t nfs_mount_option_tokens = { - { Opt_userspace, "bg" }, - { Opt_userspace, "fg" }, - { Opt_userspace, "retry=%s" }, - - { Opt_sloppy, "sloppy" }, - - { Opt_soft, "soft" }, - { Opt_softerr, "softerr" }, - { Opt_hard, "hard" }, - { Opt_deprecated, "intr" }, - { Opt_deprecated, "nointr" }, - { Opt_posix, "posix" }, - { Opt_noposix, "noposix" }, - { Opt_cto, "cto" }, - { Opt_nocto, "nocto" }, - { Opt_ac, "ac" }, - { Opt_noac, "noac" }, - { Opt_lock, "lock" }, - { Opt_nolock, "nolock" }, - { Opt_udp, "udp" }, - { Opt_tcp, "tcp" }, - { Opt_rdma, "rdma" }, - { Opt_acl, "acl" }, - { Opt_noacl, "noacl" }, - { Opt_rdirplus, "rdirplus" }, - { Opt_nordirplus, "nordirplus" }, - { Opt_sharecache, "sharecache" }, - { Opt_nosharecache, "nosharecache" }, - { Opt_resvport, "resvport" }, - { Opt_noresvport, "noresvport" }, - { Opt_fscache, "fsc" }, - { Opt_nofscache, "nofsc" }, - { Opt_migration, "migration" }, - { Opt_nomigration, "nomigration" }, - - { Opt_port, "port=%s" }, - { Opt_rsize, "rsize=%s" }, - { Opt_wsize, "wsize=%s" }, - { Opt_bsize, "bsize=%s" }, - { Opt_timeo, "timeo=%s" }, - { Opt_retrans, "retrans=%s" }, - { Opt_acregmin, "acregmin=%s" }, - { Opt_acregmax, "acregmax=%s" }, - { Opt_acdirmin, "acdirmin=%s" }, - { Opt_acdirmax, "acdirmax=%s" }, - { Opt_actimeo, "actimeo=%s" }, - { Opt_namelen, "namlen=%s" }, - { Opt_mountport, "mountport=%s" }, - { Opt_mountvers, "mountvers=%s" }, - { Opt_minorversion, "minorversion=%s" }, - - { Opt_nfsvers, "nfsvers=%s" }, - { Opt_nfsvers, "vers=%s" }, - - { Opt_sec, "sec=%s" }, - { Opt_proto, "proto=%s" }, - { Opt_mountproto, "mountproto=%s" }, - { Opt_addr, "addr=%s" }, - { Opt_clientaddr, "clientaddr=%s" }, - { Opt_mounthost, "mounthost=%s" }, - { Opt_mountaddr, "mountaddr=%s" }, - - { Opt_nconnect, "nconnect=%s" }, - - { Opt_lookupcache, "lookupcache=%s" }, - { Opt_fscache_uniq, "fsc=%s" }, - { Opt_local_lock, "local_lock=%s" }, - - /* The following needs to be listed after all other options */ - { Opt_nfsvers, "v%s" }, - - { Opt_err, NULL } -}; - -enum { - Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, - Opt_xprt_rdma6, - - Opt_xprt_err -}; - -static const match_table_t nfs_xprt_protocol_tokens = { - { Opt_xprt_udp, "udp" }, - { Opt_xprt_udp6, "udp6" }, - { Opt_xprt_tcp, "tcp" }, - { Opt_xprt_tcp6, "tcp6" }, - { Opt_xprt_rdma, "rdma" }, - { Opt_xprt_rdma6, "rdma6" }, - - { Opt_xprt_err, NULL } -}; - -enum { - Opt_sec_none, Opt_sec_sys, - Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, - Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, - Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, - - Opt_sec_err -}; - -static const match_table_t nfs_secflavor_tokens = { - { Opt_sec_none, "none" }, - { Opt_sec_none, "null" }, - { Opt_sec_sys, "sys" }, - - { Opt_sec_krb5, "krb5" }, - { Opt_sec_krb5i, "krb5i" }, - { Opt_sec_krb5p, "krb5p" }, - - { Opt_sec_lkey, "lkey" }, - { Opt_sec_lkeyi, "lkeyi" }, - { Opt_sec_lkeyp, "lkeyp" }, - - { Opt_sec_spkm, "spkm3" }, - { Opt_sec_spkmi, "spkm3i" }, - { Opt_sec_spkmp, "spkm3p" }, - - { Opt_sec_err, NULL } -}; - -enum { - Opt_lookupcache_all, Opt_lookupcache_positive, - Opt_lookupcache_none, - - Opt_lookupcache_err -}; - -static match_table_t nfs_lookupcache_tokens = { - { Opt_lookupcache_all, "all" }, - { Opt_lookupcache_positive, "pos" }, - { Opt_lookupcache_positive, "positive" }, - { Opt_lookupcache_none, "none" }, - - { Opt_lookupcache_err, NULL } -}; - -enum { - Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, - Opt_local_lock_none, - - Opt_local_lock_err -}; - -static match_table_t nfs_local_lock_tokens = { - { Opt_local_lock_all, "all" }, - { Opt_local_lock_flock, "flock" }, - { Opt_local_lock_posix, "posix" }, - { Opt_local_lock_none, "none" }, - - { Opt_local_lock_err, NULL } -}; - -enum { - Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, - Opt_vers_4_1, Opt_vers_4_2, - - Opt_vers_err -}; - -static match_table_t nfs_vers_tokens = { - { Opt_vers_2, "2" }, - { Opt_vers_3, "3" }, - { Opt_vers_4, "4" }, - { Opt_vers_4_0, "4.0" }, - { Opt_vers_4_1, "4.1" }, - { Opt_vers_4_2, "4.2" }, - - { Opt_vers_err, NULL } -}; static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); @@ -332,10 +109,6 @@ const struct super_operations nfs_sops = { EXPORT_SYMBOL_GPL(nfs_sops); #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); -static int nfs4_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, const char *dev_name); - struct file_system_type nfs4_fs_type = { .owner = THIS_MODULE, .name = "nfs4", @@ -932,141 +705,6 @@ void nfs_umount_begin(struct super_block *sb) } EXPORT_SYMBOL_GPL(nfs_umount_begin); -static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) -{ - struct nfs_parsed_mount_data *data; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (data) { - data->timeo = NFS_UNSPEC_TIMEO; - data->retrans = NFS_UNSPEC_RETRANS; - data->acregmin = NFS_DEF_ACREGMIN; - data->acregmax = NFS_DEF_ACREGMAX; - data->acdirmin = NFS_DEF_ACDIRMIN; - data->acdirmax = NFS_DEF_ACDIRMAX; - data->mount_server.port = NFS_UNSPEC_PORT; - data->nfs_server.port = NFS_UNSPEC_PORT; - data->nfs_server.protocol = XPRT_TRANSPORT_TCP; - data->selected_flavor = RPC_AUTH_MAXFLAVOR; - data->minorversion = 0; - data->need_mount = true; - data->net = current->nsproxy->net_ns; - data->lsm_opts = NULL; - } - return data; -} - -static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) -{ - if (data) { - kfree(data->client_address); - kfree(data->mount_server.hostname); - kfree(data->nfs_server.export_path); - kfree(data->nfs_server.hostname); - kfree(data->fscache_uniq); - security_free_mnt_opts(&data->lsm_opts); - kfree(data); - } -} - -/* - * Sanity-check a server address provided by the mount command. - * - * Address family must be initialized, and address must not be - * the ANY address for that family. - */ -static int nfs_verify_server_address(struct sockaddr *addr) -{ - switch (addr->sa_family) { - case AF_INET: { - struct sockaddr_in *sa = (struct sockaddr_in *)addr; - return sa->sin_addr.s_addr != htonl(INADDR_ANY); - } - case AF_INET6: { - struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; - return !ipv6_addr_any(sa); - } - } - - dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); - return 0; -} - -/* - * Select between a default port value and a user-specified port value. - * If a zero value is set, then autobind will be used. - */ -static void nfs_set_port(struct sockaddr *sap, int *port, - const unsigned short default_port) -{ - if (*port == NFS_UNSPEC_PORT) - *port = default_port; - - rpc_set_port(sap, *port); -} - -/* - * Sanity check the NFS transport protocol. - * - */ -static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) -{ - switch (mnt->nfs_server.protocol) { - case XPRT_TRANSPORT_UDP: - case XPRT_TRANSPORT_TCP: - case XPRT_TRANSPORT_RDMA: - break; - default: - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - } -} - -/* - * For text based NFSv2/v3 mounts, the mount protocol transport default - * settings should depend upon the specified NFS transport. - */ -static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) -{ - nfs_validate_transport_protocol(mnt); - - if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || - mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) - return; - switch (mnt->nfs_server.protocol) { - case XPRT_TRANSPORT_UDP: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; - break; - case XPRT_TRANSPORT_TCP: - case XPRT_TRANSPORT_RDMA: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; - } -} - -/* - * Add 'flavor' to 'auth_info' if not already present. - * Returns true if 'flavor' ends up in the list, false otherwise - */ -static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, - rpc_authflavor_t flavor) -{ - unsigned int i; - unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); - - /* make sure this flavor isn't already in the list */ - for (i = 0; i < auth_info->flavor_len; i++) { - if (flavor == auth_info->flavors[i]) - return true; - } - - if (auth_info->flavor_len + 1 >= max_flavor_len) { - dfprintk(MOUNT, "NFS: too many sec= flavors\n"); - return false; - } - - auth_info->flavors[auth_info->flavor_len++] = flavor; - return true; -} - /* * Return true if 'match' is in auth_info or auth_info is empty. * Return false otherwise. @@ -1087,627 +725,6 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, } EXPORT_SYMBOL_GPL(nfs_auth_info_match); -/* - * Parse the value of the 'sec=' option. - */ -static int nfs_parse_security_flavors(char *value, - struct nfs_parsed_mount_data *mnt) -{ - substring_t args[MAX_OPT_ARGS]; - rpc_authflavor_t pseudoflavor; - char *p; - - dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); - - while ((p = strsep(&value, ":")) != NULL) { - switch (match_token(p, nfs_secflavor_tokens, args)) { - case Opt_sec_none: - pseudoflavor = RPC_AUTH_NULL; - break; - case Opt_sec_sys: - pseudoflavor = RPC_AUTH_UNIX; - break; - case Opt_sec_krb5: - pseudoflavor = RPC_AUTH_GSS_KRB5; - break; - case Opt_sec_krb5i: - pseudoflavor = RPC_AUTH_GSS_KRB5I; - break; - case Opt_sec_krb5p: - pseudoflavor = RPC_AUTH_GSS_KRB5P; - break; - case Opt_sec_lkey: - pseudoflavor = RPC_AUTH_GSS_LKEY; - break; - case Opt_sec_lkeyi: - pseudoflavor = RPC_AUTH_GSS_LKEYI; - break; - case Opt_sec_lkeyp: - pseudoflavor = RPC_AUTH_GSS_LKEYP; - break; - case Opt_sec_spkm: - pseudoflavor = RPC_AUTH_GSS_SPKM; - break; - case Opt_sec_spkmi: - pseudoflavor = RPC_AUTH_GSS_SPKMI; - break; - case Opt_sec_spkmp: - pseudoflavor = RPC_AUTH_GSS_SPKMP; - break; - default: - dfprintk(MOUNT, - "NFS: sec= option '%s' not recognized\n", p); - return 0; - } - - if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) - return 0; - } - - return 1; -} - -static int nfs_parse_version_string(char *string, - struct nfs_parsed_mount_data *mnt, - substring_t *args) -{ - mnt->flags &= ~NFS_MOUNT_VER3; - switch (match_token(string, nfs_vers_tokens, args)) { - case Opt_vers_2: - mnt->version = 2; - break; - case Opt_vers_3: - mnt->flags |= NFS_MOUNT_VER3; - mnt->version = 3; - break; - case Opt_vers_4: - /* Backward compatibility option. In future, - * the mount program should always supply - * a NFSv4 minor version number. - */ - mnt->version = 4; - break; - case Opt_vers_4_0: - mnt->version = 4; - mnt->minorversion = 0; - break; - case Opt_vers_4_1: - mnt->version = 4; - mnt->minorversion = 1; - break; - case Opt_vers_4_2: - mnt->version = 4; - mnt->minorversion = 2; - break; - default: - return 0; - } - return 1; -} - -static int nfs_get_option_str(substring_t args[], char **option) -{ - kfree(*option); - *option = match_strdup(args); - return !*option; -} - -static int nfs_get_option_ul(substring_t args[], unsigned long *option) -{ - int rc; - char *string; - - string = match_strdup(args); - if (string == NULL) - return -ENOMEM; - rc = kstrtoul(string, 10, option); - kfree(string); - - return rc; -} - -static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, - unsigned long l_bound, unsigned long u_bound) -{ - int ret; - - ret = nfs_get_option_ul(args, option); - if (ret != 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - -/* - * Error-check and convert a string of mount options from user space into - * a data structure. The whole mount string is processed; bad options are - * skipped as they are encountered. If there were no errors, return 1; - * otherwise return 0 (zero). - */ -static int nfs_parse_mount_options(char *raw, - struct nfs_parsed_mount_data *mnt) -{ - char *p, *string; - int rc, sloppy = 0, invalid_option = 0; - unsigned short protofamily = AF_UNSPEC; - unsigned short mountfamily = AF_UNSPEC; - - if (!raw) { - dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); - return 1; - } - dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - - rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); - if (rc) - goto out_security_failure; - - while ((p = strsep(&raw, ",")) != NULL) { - substring_t args[MAX_OPT_ARGS]; - unsigned long option; - int token; - - if (!*p) - continue; - - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); - - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { - - /* - * boolean options: foo/nofoo - */ - case Opt_soft: - mnt->flags |= NFS_MOUNT_SOFT; - mnt->flags &= ~NFS_MOUNT_SOFTERR; - break; - case Opt_softerr: - mnt->flags |= NFS_MOUNT_SOFTERR; - mnt->flags &= ~NFS_MOUNT_SOFT; - break; - case Opt_hard: - mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); - break; - case Opt_posix: - mnt->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - mnt->flags &= ~NFS_MOUNT_POSIX; - break; - case Opt_cto: - mnt->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - mnt->flags |= NFS_MOUNT_NOCTO; - break; - case Opt_ac: - mnt->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - mnt->flags |= NFS_MOUNT_NOAC; - break; - case Opt_lock: - mnt->flags &= ~NFS_MOUNT_NONLM; - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - mnt->flags |= NFS_MOUNT_NONLM; - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_rdma: - mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); - break; - case Opt_acl: - mnt->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - mnt->flags |= NFS_MOUNT_NOACL; - break; - case Opt_rdirplus: - mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - mnt->flags |= NFS_MOUNT_NORDIRPLUS; - break; - case Opt_sharecache: - mnt->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - mnt->flags |= NFS_MOUNT_UNSHARED; - break; - case Opt_resvport: - mnt->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - mnt->flags |= NFS_MOUNT_NORESVPORT; - break; - case Opt_fscache: - mnt->options |= NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; - break; - case Opt_nofscache: - mnt->options &= ~NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; - break; - case Opt_migration: - mnt->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - mnt->options &= ~NFS_OPTION_MIGRATION; - break; - - /* - * options that take numeric values - */ - case Opt_port: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - mnt->nfs_server.port = option; - break; - case Opt_rsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->rsize = option; - break; - case Opt_wsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->wsize = option; - break; - case Opt_bsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->bsize = option; - break; - case Opt_timeo: - if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) - goto out_invalid_value; - mnt->timeo = option; - break; - case Opt_retrans: - if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) - goto out_invalid_value; - mnt->retrans = option; - break; - case Opt_acregmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acregmin = option; - break; - case Opt_acregmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acregmax = option; - break; - case Opt_acdirmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acdirmin = option; - break; - case Opt_acdirmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acdirmax = option; - break; - case Opt_actimeo: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acregmin = mnt->acregmax = - mnt->acdirmin = mnt->acdirmax = option; - break; - case Opt_namelen: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->namlen = option; - break; - case Opt_mountport: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - mnt->mount_server.port = option; - break; - case Opt_mountvers: - if (nfs_get_option_ul(args, &option) || - option < NFS_MNT_VERSION || - option > NFS_MNT3_VERSION) - goto out_invalid_value; - mnt->mount_server.version = option; - break; - case Opt_minorversion: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - if (option > NFS4_MAX_MINOR_VERSION) - goto out_invalid_value; - mnt->minorversion = option; - break; - - /* - * options that take text values - */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_version_string(string, mnt, args); - kfree(string); - if (!rc) - goto out_invalid_value; - break; - case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_security_flavors(string, mnt); - kfree(string); - if (!rc) { - dfprintk(MOUNT, "NFS: unrecognized " - "security flavor\n"); - return 0; - } - break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); - - protofamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma6: - protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_rdma: - /* vector side protocols to TCP */ - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); - break; - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - kfree(string); - return 0; - } - kfree(string); - break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); - kfree(string); - - mountfamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma: /* not used for side protocols */ - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - return 0; - } - break; - case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - mnt->nfs_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), - (struct sockaddr *) - &mnt->nfs_server.address, - sizeof(mnt->nfs_server.address)); - kfree(string); - if (mnt->nfs_server.addrlen == 0) - goto out_invalid_address; - break; - case Opt_clientaddr: - if (nfs_get_option_str(args, &mnt->client_address)) - goto out_nomem; - break; - case Opt_mounthost: - if (nfs_get_option_str(args, - &mnt->mount_server.hostname)) - goto out_nomem; - break; - case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - mnt->mount_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), - (struct sockaddr *) - &mnt->mount_server.address, - sizeof(mnt->mount_server.address)); - kfree(string); - if (mnt->mount_server.addrlen == 0) - goto out_invalid_address; - break; - case Opt_nconnect: - if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; - mnt->nfs_server.nconnect = option; - break; - case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { - case Opt_lookupcache_all: - mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); - break; - case Opt_lookupcache_positive: - mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; - break; - case Opt_lookupcache_none: - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "lookupcache argument\n"); - return 0; - }; - break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &mnt->fscache_uniq)) - goto out_nomem; - mnt->options |= NFS_OPTION_FSCACHE; - break; - case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, - args); - kfree(string); - switch (token) { - case Opt_local_lock_all: - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_local_lock_flock: - mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; - break; - case Opt_local_lock_posix: - mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; - break; - case Opt_local_lock_none: - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "local_lock argument\n"); - return 0; - }; - break; - - /* - * Special options - */ - case Opt_sloppy: - sloppy = 1; - dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); - break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option " - "'%s'\n", p); - break; - - default: - invalid_option = 1; - dfprintk(MOUNT, "NFS: unrecognized mount option " - "'%s'\n", p); - } - } - - if (!sloppy && invalid_option) - return 0; - - if (mnt->minorversion && mnt->version != 4) - goto out_minorversion_mismatch; - - if (mnt->options & NFS_OPTION_MIGRATION && - (mnt->version != 4 || mnt->minorversion != 0)) - goto out_migration_misuse; - - /* - * verify that any proto=/mountproto= options match the address - * families in the addr=/mountaddr= options. - */ - if (protofamily != AF_UNSPEC && - protofamily != mnt->nfs_server.address.ss_family) - goto out_proto_mismatch; - - if (mountfamily != AF_UNSPEC) { - if (mnt->mount_server.addrlen) { - if (mountfamily != mnt->mount_server.address.ss_family) - goto out_mountproto_mismatch; - } else { - if (mountfamily != mnt->nfs_server.address.ss_family) - goto out_mountproto_mismatch; - } - } - - return 1; - -out_mountproto_mismatch: - printk(KERN_INFO "NFS: mount server address does not match mountproto= " - "option\n"); - return 0; -out_proto_mismatch: - printk(KERN_INFO "NFS: server address does not match proto= option\n"); - return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return 0; -out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); - return 0; -out_minorversion_mismatch: - printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", mnt->version, mnt->minorversion); - return 0; -out_migration_misuse: - printk(KERN_INFO - "NFS: 'migration' not supported for this NFS version\n"); - return 0; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return 0; -out_security_failure: - printk(KERN_INFO "NFS: security options invalid: %d\n", rc); - return 0; -} - /* * Ensure that a specified authtype in args->auth_info is supported by * the server. Returns 0 and sets args->selected_flavor if it's ok, and @@ -1908,327 +925,6 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, } EXPORT_SYMBOL_GPL(nfs_try_mount); -/* - * Split "dev_name" into "hostname:export_path". - * - * The leftmost colon demarks the split between the server's hostname - * and the export path. If the hostname starts with a left square - * bracket, then it may contain colons. - * - * Note: caller frees hostname and export path, even on error. - */ -static int nfs_parse_devname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) -{ - size_t len; - char *end; - - if (unlikely(!dev_name || !*dev_name)) { - dfprintk(MOUNT, "NFS: device name not specified\n"); - return -EINVAL; - } - - /* Is the host name protected with square brakcets? */ - if (*dev_name == '[') { - end = strchr(++dev_name, ']'); - if (end == NULL || end[1] != ':') - goto out_bad_devname; - - len = end - dev_name; - end++; - } else { - char *comma; - - end = strchr(dev_name, ':'); - if (end == NULL) - goto out_bad_devname; - len = end - dev_name; - - /* kill possible hostname list: not supported */ - comma = strchr(dev_name, ','); - if (comma != NULL && comma < end) - len = comma - dev_name; - } - - if (len > maxnamlen) - goto out_hostname; - - /* N.B. caller will free nfs_server.hostname in all cases */ - *hostname = kstrndup(dev_name, len, GFP_KERNEL); - if (*hostname == NULL) - goto out_nomem; - len = strlen(++end); - if (len > maxpathlen) - goto out_path; - *export_path = kstrndup(end, len, GFP_KERNEL); - if (!*export_path) - goto out_nomem; - - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); - return 0; - -out_bad_devname: - dfprintk(MOUNT, "NFS: device name not in host:path format\n"); - return -EINVAL; - -out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); - return -ENOMEM; - -out_hostname: - dfprintk(MOUNT, "NFS: server hostname too long\n"); - return -ENAMETOOLONG; - -out_path: - dfprintk(MOUNT, "NFS: export pathname too long\n"); - return -ENAMETOOLONG; -} - -/* - * Validate the NFS2/NFS3 mount data - * - fills in the mount root filehandle - * - * For option strings, user space handles the following behaviors: - * - * + DNS: mapping server host name to IP address ("addr=" option) - * - * + failure mode: how to behave if a mount request can't be handled - * immediately ("fg/bg" option) - * - * + retry: how often to retry a mount request ("retry=" option) - * - * + breaking back: trying proto=udp after proto=tcp, v2 after v3, - * mountproto=tcp after mountproto=udp, and so on - */ -static int nfs23_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) -{ - struct nfs_mount_data *data = (struct nfs_mount_data *)options; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; - - if (data == NULL) - goto out_no_data; - - args->version = NFS_DEFAULT_VERSION; - switch (data->version) { - case 1: - data->namlen = 0; /* fall through */ - case 2: - data->bsize = 0; /* fall through */ - case 3: - if (data->flags & NFS_MOUNT_VER3) - goto out_no_v3; - data->root.size = NFS2_FHSIZE; - memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); - /* Turn off security negotiation */ - extra_flags |= NFS_MOUNT_SECFLAVOUR; - /* fall through */ - case 4: - if (data->flags & NFS_MOUNT_SECFLAVOUR) - goto out_no_sec; - /* fall through */ - case 5: - memset(data->context, 0, sizeof(data->context)); - /* fall through */ - case 6: - if (data->flags & NFS_MOUNT_VER3) { - if (data->root.size > NFS3_FHSIZE || data->root.size == 0) - goto out_invalid_fh; - mntfh->size = data->root.size; - args->version = 3; - } else { - mntfh->size = NFS2_FHSIZE; - args->version = 2; - } - - - memcpy(mntfh->data, data->root.data, mntfh->size); - if (mntfh->size < sizeof(mntfh->data)) - memset(mntfh->data + mntfh->size, 0, - sizeof(mntfh->data) - mntfh->size); - - /* - * Translate to nfs_parsed_mount_data, which nfs_fill_super - * can deal with. - */ - args->flags = data->flags & NFS_MOUNT_FLAGMASK; - args->flags |= extra_flags; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->need_mount = false; - - memcpy(sap, &data->addr, sizeof(data->addr)); - args->nfs_server.addrlen = sizeof(data->addr); - args->nfs_server.port = ntohs(data->addr.sin_port); - if (sap->sa_family != AF_INET || - !nfs_verify_server_address(sap)) - goto out_no_address; - - if (!(data->flags & NFS_MOUNT_TCP)) - args->nfs_server.protocol = XPRT_TRANSPORT_UDP; - /* N.B. caller will free nfs_server.hostname in all cases */ - args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); - args->namlen = data->namlen; - args->bsize = data->bsize; - - if (data->flags & NFS_MOUNT_SECFLAVOUR) - args->selected_flavor = data->pseudoflavor; - else - args->selected_flavor = RPC_AUTH_UNIX; - if (!args->nfs_server.hostname) - goto out_nomem; - - if (!(data->flags & NFS_MOUNT_NONLM)) - args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| - NFS_MOUNT_LOCAL_FCNTL); - else - args->flags |= (NFS_MOUNT_LOCAL_FLOCK| - NFS_MOUNT_LOCAL_FCNTL); - /* - * The legacy version 6 binary mount data from userspace has a - * field used only to transport selinux information into the - * the kernel. To continue to support that functionality we - * have a touch of selinux knowledge here in the NFS code. The - * userspace code converted context=blah to just blah so we are - * converting back to the full string selinux understands. - */ - if (data->context[0]){ -#ifdef CONFIG_SECURITY_SELINUX - int rc; - data->context[NFS_MAX_CONTEXT_LEN] = '\0'; - rc = security_add_mnt_opt("context", data->context, - strlen(data->context), &args->lsm_opts); - if (rc) - return rc; -#else - return -EINVAL; -#endif - } - - break; - default: - return NFS_TEXT_DATA; - } - - return 0; - -out_no_data: - dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); - return -EINVAL; - -out_no_v3: - dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", - data->version); - return -EINVAL; - -out_no_sec: - dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); - return -EINVAL; - -out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); - return -ENOMEM; - -out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; - -out_invalid_fh: - dfprintk(MOUNT, "NFS: invalid root filehandle\n"); - return -EINVAL; -} - -#if IS_ENABLED(CONFIG_NFS_V4) -static int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) -{ - if (fs_type == &nfs_fs_type) - return nfs23_validate_mount_data(options, args, mntfh, dev_name); - return nfs4_validate_mount_data(options, args, dev_name); -} -#else -static int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) -{ - return nfs23_validate_mount_data(options, args, mntfh, dev_name); -} -#endif - -static int nfs_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, - const char *dev_name) -{ - int port = 0; - int max_namelen = PAGE_SIZE; - int max_pathlen = NFS_MAXPATHLEN; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - - if (nfs_parse_mount_options((char *)options, args) == 0) - return -EINVAL; - - if (!nfs_verify_server_address(sap)) - goto out_no_address; - - if (args->version == 4) { -#if IS_ENABLED(CONFIG_NFS_V4) - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - else - port = NFS_PORT; - max_namelen = NFS4_MAXNAMLEN; - max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - nfs4_validate_mount_flags(args); -#else - goto out_v4_not_compiled; -#endif /* CONFIG_NFS_V4 */ - } else { - nfs_set_mount_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - } - - nfs_set_port(sap, &args->nfs_server.port, port); - - return nfs_parse_devname(dev_name, - &args->nfs_server.hostname, - max_namelen, - &args->nfs_server.export_path, - max_pathlen); - -#if !IS_ENABLED(CONFIG_NFS_V4) -out_v4_not_compiled: - dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); - return -EPROTONOSUPPORT; -#else -out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; -#endif /* !CONFIG_NFS_V4 */ - -out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; -} - #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ | NFS_MOUNT_SECURE \ | NFS_MOUNT_TCP \ @@ -2719,113 +1415,6 @@ nfs_prepared_mount(struct file_system_type *fs_type, int flags, #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) -{ - args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| - NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); -} - -/* - * Validate NFSv4 mount options - */ -static int nfs4_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, - const char *dev_name) -{ - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; - char *c; - - if (data == NULL) - goto out_no_data; - - args->version = 4; - - switch (data->version) { - case 1: - if (data->host_addrlen > sizeof(args->nfs_server.address)) - goto out_no_address; - if (data->host_addrlen == 0) - goto out_no_address; - args->nfs_server.addrlen = data->host_addrlen; - if (copy_from_user(sap, data->host_addr, data->host_addrlen)) - return -EFAULT; - if (!nfs_verify_server_address(sap)) - goto out_no_address; - args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); - - if (data->auth_flavourlen) { - rpc_authflavor_t pseudoflavor; - if (data->auth_flavourlen > 1) - goto out_inval_auth; - if (copy_from_user(&pseudoflavor, - data->auth_flavours, - sizeof(pseudoflavor))) - return -EFAULT; - args->selected_flavor = pseudoflavor; - } else - args->selected_flavor = RPC_AUTH_UNIX; - - c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); - if (IS_ERR(c)) - return PTR_ERR(c); - args->nfs_server.hostname = c; - - c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); - if (IS_ERR(c)) - return PTR_ERR(c); - args->nfs_server.export_path = c; - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); - - c = strndup_user(data->client_addr.data, 16); - if (IS_ERR(c)) - return PTR_ERR(c); - args->client_address = c; - - /* - * Translate to nfs_parsed_mount_data, which nfs4_fill_super - * can deal with. - */ - - args->flags = data->flags & NFS4_MOUNT_FLAGMASK; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->nfs_server.protocol = data->proto; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - - break; - default: - return NFS_TEXT_DATA; - } - - return 0; - -out_no_data: - dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); - return -EINVAL; - -out_inval_auth: - dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", - data->auth_flavourlen); - return -EINVAL; - -out_no_address: - dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); - return -EINVAL; - -out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; -} - /* * NFS v4 module parameters need to stay in the * NFS client for backwards compatibility From patchwork Fri Sep 13 12:17:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144653 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6208F18B6 for ; Fri, 13 Sep 2019 12:19:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41D532089F for ; Fri, 13 Sep 2019 12:19:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388359AbfIMMTt (ORCPT ); Fri, 13 Sep 2019 08:19:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41454 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729673AbfIMMRu (ORCPT ); Fri, 13 Sep 2019 08:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 45E6B87521A; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 268296061E; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 03C3420D46; Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 17/26] NFS: Constify mount argument match tables Date: Fri, 13 Sep 2019 08:17:39 -0400 Message-Id: <20190913121748.25391-18-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.68]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells The mount argument match tables should never be altered so constify them. Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/fs_context.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 3a34c8437917..de852177eca4 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -199,7 +199,7 @@ enum { Opt_lookupcache_err }; -static match_table_t nfs_lookupcache_tokens = { +static const match_table_t nfs_lookupcache_tokens = { { Opt_lookupcache_all, "all" }, { Opt_lookupcache_positive, "pos" }, { Opt_lookupcache_positive, "positive" }, @@ -215,7 +215,7 @@ enum { Opt_local_lock_err }; -static match_table_t nfs_local_lock_tokens = { +static const match_table_t nfs_local_lock_tokens = { { Opt_local_lock_all, "all" }, { Opt_local_lock_flock, "flock" }, { Opt_local_lock_posix, "posix" }, @@ -231,7 +231,7 @@ enum { Opt_vers_err }; -static match_table_t nfs_vers_tokens = { +static const match_table_t nfs_vers_tokens = { { Opt_vers_2, "2" }, { Opt_vers_3, "3" }, { Opt_vers_4, "4" }, From patchwork Fri Sep 13 12:17:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144581 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9FAFF16C1 for ; Fri, 13 Sep 2019 12:18:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 60F7520CC7 for ; Fri, 13 Sep 2019 12:18:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387890AbfIMMSJ (ORCPT ); Fri, 13 Sep 2019 08:18:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57770 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729820AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C26C03086218; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2692F6012E; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 0A1CE20D5C; Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 18/26] NFS: Rename struct nfs_parsed_mount_data to struct nfs_fs_context Date: Fri, 13 Sep 2019 08:17:40 -0400 Message-Id: <20190913121748.25391-19-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Rename struct nfs_parsed_mount_data to struct nfs_fs_context and rename pointers to it to "ctx". At some point this will be pointed to by an fs_context struct's fs_private pointer. Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/client.c | 66 +++---- fs/nfs/fs_context.c | 446 ++++++++++++++++++++++---------------------- fs/nfs/internal.h | 14 +- fs/nfs/nfs4client.c | 60 +++--- fs/nfs/nfs4super.c | 6 +- fs/nfs/super.c | 194 +++++++++---------- 6 files changed, 393 insertions(+), 393 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 130c065141b3..1afd796a3706 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -648,27 +648,27 @@ EXPORT_SYMBOL_GPL(nfs_init_client); * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_parsed_mount_data *data, + const struct nfs_fs_context *cfg, struct nfs_subversion *nfs_mod) { struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { - .hostname = data->nfs_server.hostname, - .addr = (const struct sockaddr *)&data->nfs_server.address, - .addrlen = data->nfs_server.addrlen, + .hostname = cfg->nfs_server.hostname, + .addr = (const struct sockaddr *)&cfg->nfs_server.address, + .addrlen = cfg->nfs_server.addrlen, .nfs_mod = nfs_mod, - .proto = data->nfs_server.protocol, - .net = data->net, + .proto = cfg->nfs_server.protocol, + .net = cfg->net, .timeparms = &timeparms, .cred = server->cred, - .nconnect = data->nfs_server.nconnect, + .nconnect = cfg->nfs_server.nconnect, }; struct nfs_client *clp; int error; - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); - if (data->flags & NFS_MOUNT_NORESVPORT) + nfs_init_timeout_values(&timeparms, cfg->nfs_server.protocol, + cfg->timeo, cfg->retrans); + if (cfg->flags & NFS_MOUNT_NORESVPORT) set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ @@ -679,46 +679,46 @@ static int nfs_init_server(struct nfs_server *server, server->nfs_client = clp; /* Initialise the client representation from the mount data */ - server->flags = data->flags; - server->options = data->options; + server->flags = cfg->flags; + server->options = cfg->options; server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; - if (data->rsize) - server->rsize = nfs_block_size(data->rsize, NULL); - if (data->wsize) - server->wsize = nfs_block_size(data->wsize, NULL); + if (cfg->rsize) + server->rsize = nfs_block_size(cfg->rsize, NULL); + if (cfg->wsize) + server->wsize = nfs_block_size(cfg->wsize, NULL); - server->acregmin = data->acregmin * HZ; - server->acregmax = data->acregmax * HZ; - server->acdirmin = data->acdirmin * HZ; - server->acdirmax = data->acdirmax * HZ; + server->acregmin = cfg->acregmin * HZ; + server->acregmax = cfg->acregmax * HZ; + server->acdirmin = cfg->acdirmin * HZ; + server->acdirmax = cfg->acdirmax * HZ; /* Start lockd here, before we might error out */ error = nfs_start_lockd(server); if (error < 0) goto error; - server->port = data->nfs_server.port; - server->auth_info = data->auth_info; + server->port = cfg->nfs_server.port; + server->auth_info = cfg->auth_info; error = nfs_init_server_rpcclient(server, &timeparms, - data->selected_flavor); + cfg->selected_flavor); if (error < 0) goto error; /* Preserve the values of mount_server-related mount options */ - if (data->mount_server.addrlen) { - memcpy(&server->mountd_address, &data->mount_server.address, - data->mount_server.addrlen); - server->mountd_addrlen = data->mount_server.addrlen; + if (cfg->mount_server.addrlen) { + memcpy(&server->mountd_address, &cfg->mount_server.address, + cfg->mount_server.addrlen); + server->mountd_addrlen = cfg->mount_server.addrlen; } - server->mountd_version = data->mount_server.version; - server->mountd_port = data->mount_server.port; - server->mountd_protocol = data->mount_server.protocol; + server->mountd_version = cfg->mount_server.version; + server->mountd_port = cfg->mount_server.port; + server->mountd_protocol = cfg->mount_server.protocol; - server->namelen = data->namlen; + server->namelen = cfg->namlen; return 0; error: @@ -959,7 +959,7 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) goto error; /* Get a client representation */ - error = nfs_init_server(server, mount_info->parsed, nfs_mod); + error = nfs_init_server(server, mount_info->ctx, nfs_mod); if (error < 0) goto error; @@ -970,7 +970,7 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) if (server->nfs_client->rpc_ops->version == 3) { if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) server->namelen = NFS3_MAXNAMLEN; - if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) + if (!(mount_info->ctx->flags & NFS_MOUNT_NORDIRPLUS)) server->caps |= NFS_CAP_READDIRPLUS; } else { if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index de852177eca4..63aa5faed9da 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -242,40 +242,40 @@ static const match_table_t nfs_vers_tokens = { { Opt_vers_err, NULL } }; -struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) +struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) { - struct nfs_parsed_mount_data *data; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (data) { - data->timeo = NFS_UNSPEC_TIMEO; - data->retrans = NFS_UNSPEC_RETRANS; - data->acregmin = NFS_DEF_ACREGMIN; - data->acregmax = NFS_DEF_ACREGMAX; - data->acdirmin = NFS_DEF_ACDIRMIN; - data->acdirmax = NFS_DEF_ACDIRMAX; - data->mount_server.port = NFS_UNSPEC_PORT; - data->nfs_server.port = NFS_UNSPEC_PORT; - data->nfs_server.protocol = XPRT_TRANSPORT_TCP; - data->selected_flavor = RPC_AUTH_MAXFLAVOR; - data->minorversion = 0; - data->need_mount = true; - data->net = current->nsproxy->net_ns; - data->lsm_opts = NULL; + struct nfs_fs_context *ctx; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (ctx) { + ctx->timeo = NFS_UNSPEC_TIMEO; + ctx->retrans = NFS_UNSPEC_RETRANS; + ctx->acregmin = NFS_DEF_ACREGMIN; + ctx->acregmax = NFS_DEF_ACREGMAX; + ctx->acdirmin = NFS_DEF_ACDIRMIN; + ctx->acdirmax = NFS_DEF_ACDIRMAX; + ctx->mount_server.port = NFS_UNSPEC_PORT; + ctx->nfs_server.port = NFS_UNSPEC_PORT; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; + ctx->minorversion = 0; + ctx->need_mount = true; + ctx->net = current->nsproxy->net_ns; + ctx->lsm_opts = NULL; } - return data; + return ctx; } -void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) +void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx) { - if (data) { - kfree(data->client_address); - kfree(data->mount_server.hostname); - kfree(data->nfs_server.export_path); - kfree(data->nfs_server.hostname); - kfree(data->fscache_uniq); - security_free_mnt_opts(&data->lsm_opts); - kfree(data); + if (ctx) { + kfree(ctx->client_address); + kfree(ctx->mount_server.hostname); + kfree(ctx->nfs_server.export_path); + kfree(ctx->nfs_server.hostname); + kfree(ctx->fscache_uniq); + security_free_mnt_opts(&ctx->lsm_opts); + kfree(ctx); } } @@ -306,15 +306,15 @@ static int nfs_verify_server_address(struct sockaddr *addr) * Sanity check the NFS transport protocol. * */ -static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) +static void nfs_validate_transport_protocol(struct nfs_fs_context *ctx) { - switch (mnt->nfs_server.protocol) { + switch (ctx->nfs_server.protocol) { case XPRT_TRANSPORT_UDP: case XPRT_TRANSPORT_TCP: case XPRT_TRANSPORT_RDMA: break; default: - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; } } @@ -322,20 +322,20 @@ static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) * For text based NFSv2/v3 mounts, the mount protocol transport default * settings should depend upon the specified NFS transport. */ -static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) +static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) { - nfs_validate_transport_protocol(mnt); + nfs_validate_transport_protocol(ctx); - if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || - mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) + if (ctx->mount_server.protocol == XPRT_TRANSPORT_UDP || + ctx->mount_server.protocol == XPRT_TRANSPORT_TCP) return; - switch (mnt->nfs_server.protocol) { + switch (ctx->nfs_server.protocol) { case XPRT_TRANSPORT_UDP: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case XPRT_TRANSPORT_TCP: case XPRT_TRANSPORT_RDMA: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; } } @@ -367,8 +367,7 @@ static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(char *value, - struct nfs_parsed_mount_data *mnt) +static int nfs_parse_security_flavors(char *value, struct nfs_fs_context *ctx) { substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; @@ -417,7 +416,7 @@ static int nfs_parse_security_flavors(char *value, return 0; } - if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) + if (!nfs_auth_info_add(&ctx->auth_info, pseudoflavor)) return 0; } @@ -425,36 +424,36 @@ static int nfs_parse_security_flavors(char *value, } static int nfs_parse_version_string(char *string, - struct nfs_parsed_mount_data *mnt, + struct nfs_fs_context *ctx, substring_t *args) { - mnt->flags &= ~NFS_MOUNT_VER3; + ctx->flags &= ~NFS_MOUNT_VER3; switch (match_token(string, nfs_vers_tokens, args)) { case Opt_vers_2: - mnt->version = 2; + ctx->version = 2; break; case Opt_vers_3: - mnt->flags |= NFS_MOUNT_VER3; - mnt->version = 3; + ctx->flags |= NFS_MOUNT_VER3; + ctx->version = 3; break; case Opt_vers_4: /* Backward compatibility option. In future, * the mount program should always supply * a NFSv4 minor version number. */ - mnt->version = 4; + ctx->version = 4; break; case Opt_vers_4_0: - mnt->version = 4; - mnt->minorversion = 0; + ctx->version = 4; + ctx->minorversion = 0; break; case Opt_vers_4_1: - mnt->version = 4; - mnt->minorversion = 1; + ctx->version = 4; + ctx->minorversion = 1; break; case Opt_vers_4_2: - mnt->version = 4; - mnt->minorversion = 2; + ctx->version = 4; + ctx->minorversion = 2; break; default: return 0; @@ -502,7 +501,7 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, * skipped as they are encountered. If there were no errors, return 1; * otherwise return 0 (zero). */ -int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) +int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) { char *p, *string; int rc, sloppy = 0, invalid_option = 0; @@ -515,7 +514,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) } dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); + rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); if (rc) goto out_security_failure; @@ -536,96 +535,96 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) * boolean options: foo/nofoo */ case Opt_soft: - mnt->flags |= NFS_MOUNT_SOFT; - mnt->flags &= ~NFS_MOUNT_SOFTERR; + ctx->flags |= NFS_MOUNT_SOFT; + ctx->flags &= ~NFS_MOUNT_SOFTERR; break; case Opt_softerr: - mnt->flags |= NFS_MOUNT_SOFTERR; - mnt->flags &= ~NFS_MOUNT_SOFT; + ctx->flags |= NFS_MOUNT_SOFTERR; + ctx->flags &= ~NFS_MOUNT_SOFT; break; case Opt_hard: - mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); break; case Opt_posix: - mnt->flags |= NFS_MOUNT_POSIX; + ctx->flags |= NFS_MOUNT_POSIX; break; case Opt_noposix: - mnt->flags &= ~NFS_MOUNT_POSIX; + ctx->flags &= ~NFS_MOUNT_POSIX; break; case Opt_cto: - mnt->flags &= ~NFS_MOUNT_NOCTO; + ctx->flags &= ~NFS_MOUNT_NOCTO; break; case Opt_nocto: - mnt->flags |= NFS_MOUNT_NOCTO; + ctx->flags |= NFS_MOUNT_NOCTO; break; case Opt_ac: - mnt->flags &= ~NFS_MOUNT_NOAC; + ctx->flags &= ~NFS_MOUNT_NOAC; break; case Opt_noac: - mnt->flags |= NFS_MOUNT_NOAC; + ctx->flags |= NFS_MOUNT_NOAC; break; case Opt_lock: - mnt->flags &= ~NFS_MOUNT_NONLM; - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_nolock: - mnt->flags |= NFS_MOUNT_NONLM; - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_rdma: - mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; xprt_load_transport(p); break; case Opt_acl: - mnt->flags &= ~NFS_MOUNT_NOACL; + ctx->flags &= ~NFS_MOUNT_NOACL; break; case Opt_noacl: - mnt->flags |= NFS_MOUNT_NOACL; + ctx->flags |= NFS_MOUNT_NOACL; break; case Opt_rdirplus: - mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; break; case Opt_nordirplus: - mnt->flags |= NFS_MOUNT_NORDIRPLUS; + ctx->flags |= NFS_MOUNT_NORDIRPLUS; break; case Opt_sharecache: - mnt->flags &= ~NFS_MOUNT_UNSHARED; + ctx->flags &= ~NFS_MOUNT_UNSHARED; break; case Opt_nosharecache: - mnt->flags |= NFS_MOUNT_UNSHARED; + ctx->flags |= NFS_MOUNT_UNSHARED; break; case Opt_resvport: - mnt->flags &= ~NFS_MOUNT_NORESVPORT; + ctx->flags &= ~NFS_MOUNT_NORESVPORT; break; case Opt_noresvport: - mnt->flags |= NFS_MOUNT_NORESVPORT; + ctx->flags |= NFS_MOUNT_NORESVPORT; break; case Opt_fscache: - mnt->options |= NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; + ctx->options |= NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; break; case Opt_nofscache: - mnt->options &= ~NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; + ctx->options &= ~NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; break; case Opt_migration: - mnt->options |= NFS_OPTION_MIGRATION; + ctx->options |= NFS_OPTION_MIGRATION; break; case Opt_nomigration: - mnt->options &= ~NFS_OPTION_MIGRATION; + ctx->options &= ~NFS_OPTION_MIGRATION; break; /* @@ -635,83 +634,83 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) if (nfs_get_option_ul(args, &option) || option > USHRT_MAX) goto out_invalid_value; - mnt->nfs_server.port = option; + ctx->nfs_server.port = option; break; case Opt_rsize: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->rsize = option; + ctx->rsize = option; break; case Opt_wsize: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->wsize = option; + ctx->wsize = option; break; case Opt_bsize: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->bsize = option; + ctx->bsize = option; break; case Opt_timeo: if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) goto out_invalid_value; - mnt->timeo = option; + ctx->timeo = option; break; case Opt_retrans: if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) goto out_invalid_value; - mnt->retrans = option; + ctx->retrans = option; break; case Opt_acregmin: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acregmin = option; + ctx->acregmin = option; break; case Opt_acregmax: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acregmax = option; + ctx->acregmax = option; break; case Opt_acdirmin: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acdirmin = option; + ctx->acdirmin = option; break; case Opt_acdirmax: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acdirmax = option; + ctx->acdirmax = option; break; case Opt_actimeo: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acregmin = mnt->acregmax = - mnt->acdirmin = mnt->acdirmax = option; + ctx->acregmin = ctx->acregmax = + ctx->acdirmin = ctx->acdirmax = option; break; case Opt_namelen: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->namlen = option; + ctx->namlen = option; break; case Opt_mountport: if (nfs_get_option_ul(args, &option) || option > USHRT_MAX) goto out_invalid_value; - mnt->mount_server.port = option; + ctx->mount_server.port = option; break; case Opt_mountvers: if (nfs_get_option_ul(args, &option) || option < NFS_MNT_VERSION || option > NFS_MNT3_VERSION) goto out_invalid_value; - mnt->mount_server.version = option; + ctx->mount_server.version = option; break; case Opt_minorversion: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; if (option > NFS4_MAX_MINOR_VERSION) goto out_invalid_value; - mnt->minorversion = option; + ctx->minorversion = option; break; /* @@ -721,7 +720,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_version_string(string, mnt, args); + rc = nfs_parse_version_string(string, ctx, args); kfree(string); if (!rc) goto out_invalid_value; @@ -730,7 +729,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_security_flavors(string, mnt); + rc = nfs_parse_security_flavors(string, ctx); kfree(string); if (!rc) { dfprintk(MOUNT, "NFS: unrecognized " @@ -751,23 +750,23 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; xprt_load_transport(string); break; default: @@ -792,13 +791,13 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma: /* not used for side protocols */ default: @@ -811,41 +810,41 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) string = match_strdup(args); if (string == NULL) goto out_nomem; - mnt->nfs_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), + ctx->nfs_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), (struct sockaddr *) - &mnt->nfs_server.address, - sizeof(mnt->nfs_server.address)); + &ctx->nfs_server.address, + sizeof(ctx->nfs_server.address)); kfree(string); - if (mnt->nfs_server.addrlen == 0) + if (ctx->nfs_server.addrlen == 0) goto out_invalid_address; break; case Opt_clientaddr: - if (nfs_get_option_str(args, &mnt->client_address)) + if (nfs_get_option_str(args, &ctx->client_address)) goto out_nomem; break; case Opt_mounthost: if (nfs_get_option_str(args, - &mnt->mount_server.hostname)) + &ctx->mount_server.hostname)) goto out_nomem; break; case Opt_mountaddr: string = match_strdup(args); if (string == NULL) goto out_nomem; - mnt->mount_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), + ctx->mount_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), (struct sockaddr *) - &mnt->mount_server.address, - sizeof(mnt->mount_server.address)); + &ctx->mount_server.address, + sizeof(ctx->mount_server.address)); kfree(string); - if (mnt->mount_server.addrlen == 0) + if (ctx->mount_server.addrlen == 0) goto out_invalid_address; break; case Opt_nconnect: if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) goto out_invalid_value; - mnt->nfs_server.nconnect = option; + ctx->nfs_server.nconnect = option; break; case Opt_lookupcache: string = match_strdup(args); @@ -856,14 +855,14 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) kfree(string); switch (token) { case Opt_lookupcache_all: - mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); + ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; case Opt_lookupcache_positive: - mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; + ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; break; case Opt_lookupcache_none: - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: dfprintk(MOUNT, "NFS: invalid " @@ -872,9 +871,9 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) }; break; case Opt_fscache_uniq: - if (nfs_get_option_str(args, &mnt->fscache_uniq)) + if (nfs_get_option_str(args, &ctx->fscache_uniq)) goto out_nomem; - mnt->options |= NFS_OPTION_FSCACHE; + ctx->options |= NFS_OPTION_FSCACHE; break; case Opt_local_lock: string = match_strdup(args); @@ -885,17 +884,17 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) kfree(string); switch (token) { case Opt_local_lock_all: - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_local_lock_flock: - mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; + ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; break; case Opt_local_lock_posix: - mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; + ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; break; case Opt_local_lock_none: - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; default: @@ -928,11 +927,11 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) if (!sloppy && invalid_option) return 0; - if (mnt->minorversion && mnt->version != 4) + if (ctx->minorversion && ctx->version != 4) goto out_minorversion_mismatch; - if (mnt->options & NFS_OPTION_MIGRATION && - (mnt->version != 4 || mnt->minorversion != 0)) + if (ctx->options & NFS_OPTION_MIGRATION && + (ctx->version != 4 || ctx->minorversion != 0)) goto out_migration_misuse; /* @@ -940,15 +939,15 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) * families in the addr=/mountaddr= options. */ if (protofamily != AF_UNSPEC && - protofamily != mnt->nfs_server.address.ss_family) + protofamily != ctx->nfs_server.address.ss_family) goto out_proto_mismatch; if (mountfamily != AF_UNSPEC) { - if (mnt->mount_server.addrlen) { - if (mountfamily != mnt->mount_server.address.ss_family) + if (ctx->mount_server.addrlen) { + if (mountfamily != ctx->mount_server.address.ss_family) goto out_mountproto_mismatch; } else { - if (mountfamily != mnt->nfs_server.address.ss_family) + if (mountfamily != ctx->nfs_server.address.ss_family) goto out_mountproto_mismatch; } } @@ -970,7 +969,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) return 0; out_minorversion_mismatch: printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", mnt->version, mnt->minorversion); + "minorversion=%u\n", ctx->version, ctx->minorversion); return 0; out_migration_misuse: printk(KERN_INFO @@ -1078,18 +1077,18 @@ static int nfs_parse_devname(const char *dev_name, * mountproto=tcp after mountproto=udp, and so on */ static int nfs23_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name) { struct nfs_mount_data *data = (struct nfs_mount_data *)options; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; if (data == NULL) goto out_no_data; - args->version = NFS_DEFAULT_VERSION; + ctx->version = NFS_DEFAULT_VERSION; switch (data->version) { case 1: data->namlen = 0; /* fall through */ @@ -1115,10 +1114,10 @@ static int nfs23_validate_mount_data(void *options, if (data->root.size > NFS3_FHSIZE || data->root.size == 0) goto out_invalid_fh; mntfh->size = data->root.size; - args->version = 3; + ctx->version = 3; } else { mntfh->size = NFS2_FHSIZE; - args->version = 2; + ctx->version = 2; } @@ -1128,47 +1127,47 @@ static int nfs23_validate_mount_data(void *options, sizeof(mntfh->data) - mntfh->size); /* - * Translate to nfs_parsed_mount_data, which nfs_fill_super + * Translate to nfs_fs_context, which nfs_fill_super * can deal with. */ - args->flags = data->flags & NFS_MOUNT_FLAGMASK; - args->flags |= extra_flags; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->need_mount = false; + ctx->flags = data->flags & NFS_MOUNT_FLAGMASK; + ctx->flags |= extra_flags; + ctx->rsize = data->rsize; + ctx->wsize = data->wsize; + ctx->timeo = data->timeo; + ctx->retrans = data->retrans; + ctx->acregmin = data->acregmin; + ctx->acregmax = data->acregmax; + ctx->acdirmin = data->acdirmin; + ctx->acdirmax = data->acdirmax; + ctx->need_mount = false; memcpy(sap, &data->addr, sizeof(data->addr)); - args->nfs_server.addrlen = sizeof(data->addr); - args->nfs_server.port = ntohs(data->addr.sin_port); + ctx->nfs_server.addrlen = sizeof(data->addr); + ctx->nfs_server.port = ntohs(data->addr.sin_port); if (sap->sa_family != AF_INET || !nfs_verify_server_address(sap)) goto out_no_address; if (!(data->flags & NFS_MOUNT_TCP)) - args->nfs_server.protocol = XPRT_TRANSPORT_UDP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; /* N.B. caller will free nfs_server.hostname in all cases */ - args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); - args->namlen = data->namlen; - args->bsize = data->bsize; + ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); + ctx->namlen = data->namlen; + ctx->bsize = data->bsize; if (data->flags & NFS_MOUNT_SECFLAVOUR) - args->selected_flavor = data->pseudoflavor; + ctx->selected_flavor = data->pseudoflavor; else - args->selected_flavor = RPC_AUTH_UNIX; - if (!args->nfs_server.hostname) + ctx->selected_flavor = RPC_AUTH_UNIX; + if (!ctx->nfs_server.hostname) goto out_nomem; if (!(data->flags & NFS_MOUNT_NONLM)) - args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); else - args->flags |= (NFS_MOUNT_LOCAL_FLOCK| + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); /* * The legacy version 6 binary mount data from userspace has a @@ -1183,7 +1182,7 @@ static int nfs23_validate_mount_data(void *options, int rc; data->context[NFS_MAX_CONTEXT_LEN] = '\0'; rc = security_add_mnt_opt("context", data->context, - strlen(data->context), &args->lsm_opts); + strlen(data->context), ctx->lsm_opts); if (rc) return rc; #else @@ -1225,10 +1224,9 @@ static int nfs23_validate_mount_data(void *options, } #if IS_ENABLED(CONFIG_NFS_V4) - -static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) +static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx) { - args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| + ctx->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); } @@ -1236,30 +1234,30 @@ static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) * Validate NFSv4 mount options */ static int nfs4_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, const char *dev_name) { - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; char *c; if (data == NULL) goto out_no_data; - args->version = 4; + ctx->version = 4; switch (data->version) { case 1: - if (data->host_addrlen > sizeof(args->nfs_server.address)) + if (data->host_addrlen > sizeof(ctx->nfs_server.address)) goto out_no_address; if (data->host_addrlen == 0) goto out_no_address; - args->nfs_server.addrlen = data->host_addrlen; + ctx->nfs_server.addrlen = data->host_addrlen; if (copy_from_user(sap, data->host_addr, data->host_addrlen)) return -EFAULT; if (!nfs_verify_server_address(sap)) goto out_no_address; - args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); + ctx->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); if (data->auth_flavourlen) { rpc_authflavor_t pseudoflavor; @@ -1269,43 +1267,43 @@ static int nfs4_validate_mount_data(void *options, data->auth_flavours, sizeof(pseudoflavor))) return -EFAULT; - args->selected_flavor = pseudoflavor; + ctx->selected_flavor = pseudoflavor; } else - args->selected_flavor = RPC_AUTH_UNIX; + ctx->selected_flavor = RPC_AUTH_UNIX; c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); if (IS_ERR(c)) return PTR_ERR(c); - args->nfs_server.hostname = c; + ctx->nfs_server.hostname = c; c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); if (IS_ERR(c)) return PTR_ERR(c); - args->nfs_server.export_path = c; + ctx->nfs_server.export_path = c; dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); c = strndup_user(data->client_addr.data, 16); if (IS_ERR(c)) return PTR_ERR(c); - args->client_address = c; + ctx->client_address = c; /* - * Translate to nfs_parsed_mount_data, which nfs4_fill_super + * Translate to nfs_fs_context, which nfs4_fill_super * can deal with. */ - args->flags = data->flags & NFS4_MOUNT_FLAGMASK; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->nfs_server.protocol = data->proto; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + ctx->flags = data->flags & NFS4_MOUNT_FLAGMASK; + ctx->rsize = data->rsize; + ctx->wsize = data->wsize; + ctx->timeo = data->timeo; + ctx->retrans = data->retrans; + ctx->acregmin = data->acregmin; + ctx->acregmax = data->acregmax; + ctx->acdirmin = data->acdirmin; + ctx->acdirmax = data->acdirmax; + ctx->nfs_server.protocol = data->proto; + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) goto out_invalid_transport_udp; break; @@ -1335,67 +1333,67 @@ static int nfs4_validate_mount_data(void *options, int nfs_validate_mount_data(struct file_system_type *fs_type, void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name) { if (fs_type == &nfs_fs_type) - return nfs23_validate_mount_data(options, args, mntfh, dev_name); - return nfs4_validate_mount_data(options, args, dev_name); + return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); + return nfs4_validate_mount_data(options, ctx, dev_name); } #else int nfs_validate_mount_data(struct file_system_type *fs_type, void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name) { - return nfs23_validate_mount_data(options, args, mntfh, dev_name); + return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); } #endif int nfs_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, const char *dev_name) { int port = 0; int max_namelen = PAGE_SIZE; int max_pathlen = NFS_MAXPATHLEN; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; - if (nfs_parse_mount_options((char *)options, args) == 0) + if (nfs_parse_mount_options((char *)options, ctx) == 0) return -EINVAL; if (!nfs_verify_server_address(sap)) goto out_no_address; - if (args->version == 4) { + if (ctx->version == 4) { #if IS_ENABLED(CONFIG_NFS_V4) - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) port = NFS_RDMA_PORT; else port = NFS_PORT; max_namelen = NFS4_MAXNAMLEN; max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) goto out_invalid_transport_udp; - nfs4_validate_mount_flags(args); + nfs4_validate_mount_flags(ctx); #else goto out_v4_not_compiled; #endif /* CONFIG_NFS_V4 */ } else { - nfs_set_mount_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + nfs_set_mount_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) port = NFS_RDMA_PORT; } - nfs_set_port(sap, &args->nfs_server.port, port); + nfs_set_port(sap, &ctx->nfs_server.port, port); return nfs_parse_devname(dev_name, - &args->nfs_server.hostname, + &ctx->nfs_server.hostname, max_namelen, - &args->nfs_server.export_path, + &ctx->nfs_server.export_path, max_pathlen); #if !IS_ENABLED(CONFIG_NFS_V4) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index b66fd35993b3..632174d666a8 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -89,7 +89,7 @@ struct nfs_client_initdata { /* * In-kernel mount arguments */ -struct nfs_parsed_mount_data { +struct nfs_fs_context { int flags; unsigned int rsize, wsize; unsigned int timeo, retrans; @@ -146,7 +146,7 @@ struct nfs_mount_request { struct nfs_mount_info { unsigned int inherited_bsize; - struct nfs_parsed_mount_data *parsed; + struct nfs_fs_context *ctx; struct nfs_clone_mount *cloned; struct nfs_server *server; struct nfs_fh *mntfh; @@ -237,16 +237,16 @@ struct nfs_pageio_descriptor; /* mount.c */ #define NFS_TEXT_DATA 1 -extern struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void); -extern void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data); -extern int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt); +extern struct nfs_fs_context *nfs_alloc_parsed_mount_data(void); +extern void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx); +extern int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx); extern int nfs_validate_mount_data(struct file_system_type *fs_type, void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name); extern int nfs_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, const char *dev_name); /* pagelist.c */ diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 16fba83b5c4b..2ee2281ce404 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1053,61 +1053,61 @@ static int nfs4_server_common_setup(struct nfs_server *server, * Create a version 4 volume record */ static int nfs4_init_server(struct nfs_server *server, - struct nfs_parsed_mount_data *data) + struct nfs_fs_context *ctx) { struct rpc_timeout timeparms; int error; - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); + nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, + ctx->timeo, ctx->retrans); /* Initialise the client representation from the mount data */ - server->flags = data->flags; - server->options = data->options; - server->auth_info = data->auth_info; + server->flags = ctx->flags; + server->options = ctx->options; + server->auth_info = ctx->auth_info; /* Use the first specified auth flavor. If this flavor isn't * allowed by the server, use the SECINFO path to try the * other specified flavors */ - if (data->auth_info.flavor_len >= 1) - data->selected_flavor = data->auth_info.flavors[0]; + if (ctx->auth_info.flavor_len >= 1) + ctx->selected_flavor = ctx->auth_info.flavors[0]; else - data->selected_flavor = RPC_AUTH_UNIX; + ctx->selected_flavor = RPC_AUTH_UNIX; /* Get a client record */ error = nfs4_set_client(server, - data->nfs_server.hostname, - (const struct sockaddr *)&data->nfs_server.address, - data->nfs_server.addrlen, - data->client_address, - data->nfs_server.protocol, + ctx->nfs_server.hostname, + (const struct sockaddr *)&ctx->nfs_server.address, + ctx->nfs_server.addrlen, + ctx->client_address, + ctx->nfs_server.protocol, &timeparms, - data->minorversion, - data->nfs_server.nconnect, - data->net); + ctx->minorversion, + ctx->nfs_server.nconnect, + ctx->net); if (error < 0) return error; - if (data->rsize) - server->rsize = nfs_block_size(data->rsize, NULL); - if (data->wsize) - server->wsize = nfs_block_size(data->wsize, NULL); + if (ctx->rsize) + server->rsize = nfs_block_size(ctx->rsize, NULL); + if (ctx->wsize) + server->wsize = nfs_block_size(ctx->wsize, NULL); - server->acregmin = data->acregmin * HZ; - server->acregmax = data->acregmax * HZ; - server->acdirmin = data->acdirmin * HZ; - server->acdirmax = data->acdirmax * HZ; - server->port = data->nfs_server.port; + server->acregmin = ctx->acregmin * HZ; + server->acregmax = ctx->acregmax * HZ; + server->acdirmin = ctx->acdirmin * HZ; + server->acdirmax = ctx->acdirmax * HZ; + server->port = ctx->nfs_server.port; return nfs_init_server_rpcclient(server, &timeparms, - data->selected_flavor); + ctx->selected_flavor); } /* * Create a version 4 volume record * - keyed on server and FSID */ -/*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, +/*struct nfs_server *nfs4_create_server(const struct nfs_fs_context *data, struct nfs_fh *mntfh)*/ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) { @@ -1121,10 +1121,10 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) server->cred = get_cred(current_cred()); - auth_probe = mount_info->parsed->auth_info.flavor_len < 1; + auth_probe = mount_info->ctx->auth_info.flavor_len < 1; /* set up the general RPC client */ - error = nfs4_init_server(server, mount_info->parsed); + error = nfs4_init_server(server, mount_info->ctx); if (error < 0) goto error; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 38f2eec7e1ad..ca9740137cfe 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -198,15 +198,15 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { - struct nfs_parsed_mount_data *data = mount_info->parsed; + struct nfs_fs_context *ctx = mount_info->ctx; struct dentry *res; dfprintk(MOUNT, "--> nfs4_try_mount()\n"); res = do_nfs4_mount(nfs4_create_server(mount_info), flags, mount_info, - data->nfs_server.hostname, - data->nfs_server.export_path); + ctx->nfs_server.hostname, + ctx->nfs_server.export_path); dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 886220d2da4e..abd99ed00e39 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -726,12 +726,13 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, EXPORT_SYMBOL_GPL(nfs_auth_info_match); /* - * Ensure that a specified authtype in args->auth_info is supported by - * the server. Returns 0 and sets args->selected_flavor if it's ok, and + * Ensure that a specified authtype in cfg->auth_info is supported by + * the server. Returns 0 and sets cfg->selected_flavor if it's ok, and * -EACCES if not. */ -static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, - rpc_authflavor_t *server_authlist, unsigned int count) +static int nfs_verify_authflavors(struct nfs_fs_context *cfg, + rpc_authflavor_t *server_authlist, + unsigned int count) { rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; bool found_auth_null = false; @@ -752,7 +753,7 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, for (i = 0; i < count; i++) { flavor = server_authlist[i]; - if (nfs_auth_info_match(&args->auth_info, flavor)) + if (nfs_auth_info_match(&cfg->auth_info, flavor)) goto out; if (flavor == RPC_AUTH_NULL) @@ -760,7 +761,7 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, } if (found_auth_null) { - flavor = args->auth_info.flavors[0]; + flavor = cfg->auth_info.flavors[0]; goto out; } @@ -769,8 +770,8 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, return -EACCES; out: - args->selected_flavor = flavor; - dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); + cfg->selected_flavor = flavor; + dfprintk(MOUNT, "NFS: using auth flavor %u\n", cfg->selected_flavor); return 0; } @@ -778,50 +779,50 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_request_mount(struct nfs_parsed_mount_data *args, +static int nfs_request_mount(struct nfs_fs_context *cfg, struct nfs_fh *root_fh, rpc_authflavor_t *server_authlist, unsigned int *server_authlist_len) { struct nfs_mount_request request = { .sap = (struct sockaddr *) - &args->mount_server.address, - .dirpath = args->nfs_server.export_path, - .protocol = args->mount_server.protocol, + &cfg->mount_server.address, + .dirpath = cfg->nfs_server.export_path, + .protocol = cfg->mount_server.protocol, .fh = root_fh, - .noresvport = args->flags & NFS_MOUNT_NORESVPORT, + .noresvport = cfg->flags & NFS_MOUNT_NORESVPORT, .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, - .net = args->net, + .net = cfg->net, }; int status; - if (args->mount_server.version == 0) { - switch (args->version) { + if (cfg->mount_server.version == 0) { + switch (cfg->version) { default: - args->mount_server.version = NFS_MNT3_VERSION; + cfg->mount_server.version = NFS_MNT3_VERSION; break; case 2: - args->mount_server.version = NFS_MNT_VERSION; + cfg->mount_server.version = NFS_MNT_VERSION; } } - request.version = args->mount_server.version; + request.version = cfg->mount_server.version; - if (args->mount_server.hostname) - request.hostname = args->mount_server.hostname; + if (cfg->mount_server.hostname) + request.hostname = cfg->mount_server.hostname; else - request.hostname = args->nfs_server.hostname; + request.hostname = cfg->nfs_server.hostname; /* * Construct the mount server's address. */ - if (args->mount_server.address.ss_family == AF_UNSPEC) { - memcpy(request.sap, &args->nfs_server.address, - args->nfs_server.addrlen); - args->mount_server.addrlen = args->nfs_server.addrlen; + if (cfg->mount_server.address.ss_family == AF_UNSPEC) { + memcpy(request.sap, &cfg->nfs_server.address, + cfg->nfs_server.addrlen); + cfg->mount_server.addrlen = cfg->nfs_server.addrlen; } - request.salen = args->mount_server.addrlen; - nfs_set_port(request.sap, &args->mount_server.port, 0); + request.salen = cfg->mount_server.addrlen; + nfs_set_port(request.sap, &cfg->mount_server.port, 0); /* * Now ask the mount server to map our export path @@ -844,12 +845,12 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf bool tried_auth_unix = false; bool auth_null_in_list = false; struct nfs_server *server = ERR_PTR(-EACCES); - struct nfs_parsed_mount_data *args = mount_info->parsed; + struct nfs_fs_context *ctx = mount_info->ctx; rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; unsigned int authlist_len = ARRAY_SIZE(authlist); struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - status = nfs_request_mount(args, mount_info->mntfh, authlist, + status = nfs_request_mount(ctx, mount_info->mntfh, authlist, &authlist_len); if (status) return ERR_PTR(status); @@ -858,10 +859,10 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf * Was a sec= authflavor specified in the options? First, verify * whether the server supports it, and then just try to use it if so. */ - if (args->auth_info.flavor_len > 0) { - status = nfs_verify_authflavors(args, authlist, authlist_len); + if (ctx->auth_info.flavor_len > 0) { + status = nfs_verify_authflavors(ctx, authlist, authlist_len); dfprintk(MOUNT, "NFS: using auth flavor %u\n", - args->selected_flavor); + ctx->selected_flavor); if (status) return ERR_PTR(status); return nfs_mod->rpc_ops->create_server(mount_info); @@ -890,7 +891,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Fallthrough */ } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); - args->selected_flavor = flavor; + ctx->selected_flavor = flavor; server = nfs_mod->rpc_ops->create_server(mount_info); if (!IS_ERR(server)) return server; @@ -906,7 +907,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); - args->selected_flavor = RPC_AUTH_UNIX; + ctx->selected_flavor = RPC_AUTH_UNIX; return nfs_mod->rpc_ops->create_server(mount_info); } @@ -916,7 +917,7 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - if (mount_info->parsed->need_mount) + if (mount_info->ctx->need_mount) mount_info->server = nfs_try_mount_request(mount_info); else mount_info->server = nfs_mod->rpc_ops->create_server(mount_info); @@ -940,24 +941,24 @@ EXPORT_SYMBOL_GPL(nfs_try_mount); static int nfs_compare_remount_data(struct nfs_server *nfss, - struct nfs_parsed_mount_data *data) + struct nfs_fs_context *ctx) { - if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || - data->rsize != nfss->rsize || - data->wsize != nfss->wsize || - data->version != nfss->nfs_client->rpc_ops->version || - data->minorversion != nfss->nfs_client->cl_minorversion || - data->retrans != nfss->client->cl_timeout->to_retries || - !nfs_auth_info_match(&data->auth_info, nfss->client->cl_auth->au_flavor) || - data->acregmin != nfss->acregmin / HZ || - data->acregmax != nfss->acregmax / HZ || - data->acdirmin != nfss->acdirmin / HZ || - data->acdirmax != nfss->acdirmax / HZ || - data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || - (data->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || - data->nfs_server.port != nfss->port || - data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || - !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, + if ((ctx->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || + ctx->rsize != nfss->rsize || + ctx->wsize != nfss->wsize || + ctx->version != nfss->nfs_client->rpc_ops->version || + ctx->minorversion != nfss->nfs_client->cl_minorversion || + ctx->retrans != nfss->client->cl_timeout->to_retries || + !nfs_auth_info_match(&ctx->auth_info, nfss->client->cl_auth->au_flavor) || + ctx->acregmin != nfss->acregmin / HZ || + ctx->acregmax != nfss->acregmax / HZ || + ctx->acdirmin != nfss->acdirmin / HZ || + ctx->acdirmax != nfss->acdirmax / HZ || + ctx->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || + (ctx->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || + ctx->nfs_server.port != nfss->port || + ctx->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || + !rpc_cmp_addr((struct sockaddr *)&ctx->nfs_server.address, (struct sockaddr *)&nfss->nfs_client->cl_addr)) return -EINVAL; @@ -969,7 +970,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) { int error; struct nfs_server *nfss = sb->s_fs_info; - struct nfs_parsed_mount_data *data; + struct nfs_fs_context *ctx; struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; u32 nfsvers = nfss->nfs_client->rpc_ops->version; @@ -987,32 +988,32 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) options->version <= 6)))) return 0; - data = nfs_alloc_parsed_mount_data(); - if (data == NULL) + ctx = nfs_alloc_parsed_mount_data(); + if (ctx == NULL) return -ENOMEM; /* fill out struct with values from existing mount */ - data->flags = nfss->flags; - data->rsize = nfss->rsize; - data->wsize = nfss->wsize; - data->retrans = nfss->client->cl_timeout->to_retries; - data->selected_flavor = nfss->client->cl_auth->au_flavor; - data->acregmin = nfss->acregmin / HZ; - data->acregmax = nfss->acregmax / HZ; - data->acdirmin = nfss->acdirmin / HZ; - data->acdirmax = nfss->acdirmax / HZ; - data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; - data->nfs_server.port = nfss->port; - data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; - data->version = nfsvers; - data->minorversion = nfss->nfs_client->cl_minorversion; - data->net = current->nsproxy->net_ns; - memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, - data->nfs_server.addrlen); + ctx->flags = nfss->flags; + ctx->rsize = nfss->rsize; + ctx->wsize = nfss->wsize; + ctx->retrans = nfss->client->cl_timeout->to_retries; + ctx->selected_flavor = nfss->client->cl_auth->au_flavor; + ctx->acregmin = nfss->acregmin / HZ; + ctx->acregmax = nfss->acregmax / HZ; + ctx->acdirmin = nfss->acdirmin / HZ; + ctx->acdirmax = nfss->acdirmax / HZ; + ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; + ctx->nfs_server.port = nfss->port; + ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; + ctx->version = nfsvers; + ctx->minorversion = nfss->nfs_client->cl_minorversion; + ctx->net = current->nsproxy->net_ns; + memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, + ctx->nfs_server.addrlen); /* overwrite those values with any that were specified */ error = -EINVAL; - if (!nfs_parse_mount_options((char *)options, data)) + if (!nfs_parse_mount_options((char *)options, ctx)) goto out; /* @@ -1021,15 +1022,15 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the * remount options, so we have to explicitly reset it. */ - if (data->flags & NFS_MOUNT_NOAC) + if (ctx->flags & NFS_MOUNT_NOAC) *flags |= SB_SYNCHRONOUS; /* compare new mount options with old ones */ - error = nfs_compare_remount_data(nfss, data); + error = nfs_compare_remount_data(nfss, ctx); if (!error) - error = security_sb_remount(sb, data->lsm_opts); + error = security_sb_remount(sb, ctx->lsm_opts); out: - nfs_free_parsed_mount_data(data); + nfs_free_parsed_mount_data(ctx); return error; } EXPORT_SYMBOL_GPL(nfs_remount); @@ -1039,15 +1040,15 @@ EXPORT_SYMBOL_GPL(nfs_remount); */ static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) { - struct nfs_parsed_mount_data *data = mount_info->parsed; + struct nfs_fs_context *ctx = mount_info->ctx; struct nfs_server *server = NFS_SB(sb); sb->s_blocksize_bits = 0; sb->s_blocksize = 0; sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; sb->s_op = server->nfs_client->cl_nfs_mod->sops; - if (data && data->bsize) - sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); + if (ctx && ctx->bsize) + sb->s_blocksize = nfs_block_size(ctx->bsize, &sb->s_blocksize_bits); if (server->nfs_client->rpc_ops->version != 2) { /* The VFS shouldn't apply the umask to mode bits. We will do @@ -1199,7 +1200,7 @@ static int nfs_compare_super(struct super_block *sb, void *data) #ifdef CONFIG_NFS_FSCACHE static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_parsed_mount_data *parsed, + struct nfs_fs_context *ctx, struct nfs_clone_mount *cloned) { struct nfs_server *nfss = NFS_SB(sb); @@ -1209,12 +1210,12 @@ static void nfs_get_cache_cookie(struct super_block *sb, nfss->fscache_key = NULL; nfss->fscache = NULL; - if (parsed) { - if (!(parsed->options & NFS_OPTION_FSCACHE)) + if (ctx) { + if (!(ctx->options & NFS_OPTION_FSCACHE)) return; - if (parsed->fscache_uniq) { - uniq = parsed->fscache_uniq; - ulen = strlen(parsed->fscache_uniq); + if (ctx->fscache_uniq) { + uniq = ctx->fscache_uniq; + ulen = strlen(ctx->fscache_uniq); } } else if (cloned) { struct nfs_server *mnt_s = NFS_SB(cloned->sb); @@ -1231,7 +1232,7 @@ static void nfs_get_cache_cookie(struct super_block *sb, } #else static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_parsed_mount_data *parsed, + struct nfs_fs_context *parsed, struct nfs_clone_mount *cloned) { } @@ -1296,7 +1297,7 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, s->s_blocksize_bits = bsize; s->s_blocksize = 1U << bsize; } - nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); + nfs_get_cache_cookie(s, mount_info->ctx, mount_info->cloned); if (!(server->flags & NFS_MOUNT_UNSHARED)) s->s_iflags |= SB_I_MULTIROOT; } @@ -1317,7 +1318,7 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, &kflags_out); } else { - error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, + error = security_sb_set_mnt_opts(s, mount_info->ctx->lsm_opts, kflags, &kflags_out); } if (error) @@ -1354,21 +1355,22 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, struct nfs_subversion *nfs_mod; int error; - mount_info.parsed = nfs_alloc_parsed_mount_data(); + mount_info.ctx = nfs_alloc_parsed_mount_data(); mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.parsed == NULL || mount_info.mntfh == NULL) + if (mount_info.ctx == NULL || mount_info.mntfh == NULL) goto out; /* Validate the mount data */ - error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); + error = nfs_validate_mount_data(fs_type, raw_data, mount_info.ctx, mount_info.mntfh, dev_name); if (error == NFS_TEXT_DATA) - error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); + error = nfs_validate_text_mount_data(raw_data, + mount_info.ctx, dev_name); if (error < 0) { mntroot = ERR_PTR(error); goto out; } - nfs_mod = get_nfs_version(mount_info.parsed->version); + nfs_mod = get_nfs_version(mount_info.ctx->version); if (IS_ERR(nfs_mod)) { mntroot = ERR_CAST(nfs_mod); goto out; @@ -1379,7 +1381,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, put_nfs_version(nfs_mod); out: - nfs_free_parsed_mount_data(mount_info.parsed); + nfs_free_parsed_mount_data(mount_info.ctx); nfs_free_fhandle(mount_info.mntfh); return mntroot; } From patchwork Fri Sep 13 12:17:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144623 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C8DF376 for ; 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Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 19/26] NFS: Split nfs_parse_mount_options() Date: Fri, 13 Sep 2019 08:17:41 -0400 Message-Id: <20190913121748.25391-20-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.71]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Split nfs_parse_mount_options() to move the prologue, list-splitting and epilogue into one function and the per-option processing into another. Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/fs_context.c | 126 ++++++++++++++++++++++++-------------------- fs/nfs/internal.h | 3 ++ 2 files changed, 73 insertions(+), 56 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 63aa5faed9da..3ad8fc68e623 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -496,36 +496,18 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, } /* - * Error-check and convert a string of mount options from user space into - * a data structure. The whole mount string is processed; bad options are - * skipped as they are encountered. If there were no errors, return 1; - * otherwise return 0 (zero). + * Parse a single mount option in "key[=val]" form. */ -int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) +static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { - char *p, *string; - int rc, sloppy = 0, invalid_option = 0; - unsigned short protofamily = AF_UNSPEC; - unsigned short mountfamily = AF_UNSPEC; - - if (!raw) { - dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); - return 1; - } - dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - - rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); - if (rc) - goto out_security_failure; + char *string; + int rc; - while ((p = strsep(&raw, ",")) != NULL) { + { substring_t args[MAX_OPT_ARGS]; unsigned long option; int token; - if (!*p) - continue; - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); token = match_token(p, nfs_mount_option_tokens, args); @@ -734,7 +716,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) if (!rc) { dfprintk(MOUNT, "NFS: unrecognized " "security flavor\n"); - return 0; + return -EINVAL; } break; case Opt_proto: @@ -744,24 +726,24 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) token = match_token(string, nfs_xprt_protocol_tokens, args); - protofamily = AF_INET; + ctx->protofamily = AF_INET; switch (token) { case Opt_xprt_udp6: - protofamily = AF_INET6; + ctx->protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->flags &= ~NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - protofamily = AF_INET6; + ctx->protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: - protofamily = AF_INET6; + ctx->protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ @@ -773,7 +755,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) dfprintk(MOUNT, "NFS: unrecognized " "transport protocol\n"); kfree(string); - return 0; + return -EINVAL; } kfree(string); break; @@ -785,16 +767,16 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) nfs_xprt_protocol_tokens, args); kfree(string); - mountfamily = AF_INET; + ctx->mountfamily = AF_INET; switch (token) { case Opt_xprt_udp6: - mountfamily = AF_INET6; + ctx->mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - mountfamily = AF_INET6; + ctx->mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; @@ -803,7 +785,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: unrecognized " "transport protocol\n"); - return 0; + return -EINVAL; } break; case Opt_addr: @@ -867,7 +849,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: invalid " "lookupcache argument\n"); - return 0; + return -EINVAL; }; break; case Opt_fscache_uniq: @@ -900,7 +882,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: invalid " "local_lock argument\n"); - return 0; + return -EINVAL; }; break; @@ -908,7 +890,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * Special options */ case Opt_sloppy: - sloppy = 1; + ctx->sloppy = 1; dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); break; case Opt_userspace: @@ -918,12 +900,53 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) break; default: - invalid_option = 1; dfprintk(MOUNT, "NFS: unrecognized mount option " "'%s'\n", p); + return -EINVAL; } } + return 0; + +out_invalid_address: + printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); + return -EINVAL; +out_invalid_value: + printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + return -EINVAL; +out_nomem: + printk(KERN_INFO "NFS: not enough memory to parse option\n"); + return -ENOMEM; +} + +/* + * Error-check and convert a string of mount options from user space into + * a data structure. The whole mount string is processed; bad options are + * skipped as they are encountered. If there were no errors, return 1; + * otherwise return 0 (zero). + */ +int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) +{ + char *p; + int rc, sloppy = 0, invalid_option = 0; + + if (!raw) { + dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); + return 1; + } + dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); + + rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); + if (rc) + goto out_security_failure; + + while ((p = strsep(&raw, ",")) != NULL) { + if (!*p) + continue; + if (nfs_fs_context_parse_option(ctx, p) < 0) + invalid_option = true; + } + if (!sloppy && invalid_option) return 0; @@ -938,22 +961,26 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * verify that any proto=/mountproto= options match the address * families in the addr=/mountaddr= options. */ - if (protofamily != AF_UNSPEC && - protofamily != ctx->nfs_server.address.ss_family) + if (ctx->protofamily != AF_UNSPEC && + ctx->protofamily != ctx->nfs_server.address.ss_family) goto out_proto_mismatch; - if (mountfamily != AF_UNSPEC) { + if (ctx->mountfamily != AF_UNSPEC) { if (ctx->mount_server.addrlen) { - if (mountfamily != ctx->mount_server.address.ss_family) + if (ctx->mountfamily != ctx->mount_server.address.ss_family) goto out_mountproto_mismatch; } else { - if (mountfamily != ctx->nfs_server.address.ss_family) + if (ctx->mountfamily != ctx->nfs_server.address.ss_family) goto out_mountproto_mismatch; } } return 1; +out_minorversion_mismatch: + printk(KERN_INFO "NFS: mount option vers=%u does not support " + "minorversion=%u\n", ctx->version, ctx->minorversion); + return 0; out_mountproto_mismatch: printk(KERN_INFO "NFS: mount server address does not match mountproto= " "option\n"); @@ -961,23 +988,10 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) out_proto_mismatch: printk(KERN_INFO "NFS: server address does not match proto= option\n"); return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return 0; -out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); - return 0; -out_minorversion_mismatch: - printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", ctx->version, ctx->minorversion); - return 0; out_migration_misuse: printk(KERN_INFO "NFS: 'migration' not supported for this NFS version\n"); - return 0; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return 0; + return -EINVAL; out_security_failure: printk(KERN_INFO "NFS: security options invalid: %d\n", rc); return 0; diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 632174d666a8..d084182f8e43 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -104,7 +104,10 @@ struct nfs_fs_context { unsigned int version; unsigned int minorversion; char *fscache_uniq; + unsigned short protofamily; + unsigned short mountfamily; bool need_mount; + bool sloppy; struct { struct sockaddr_storage address; From patchwork Fri Sep 13 12:17:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144627 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1A70614E5 for ; 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Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 20/26] NFS: Deindent nfs_fs_context_parse_option() Date: Fri, 13 Sep 2019 08:17:42 -0400 Message-Id: <20190913121748.25391-21-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Deindent nfs_fs_context_parse_option(). Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/fs_context.c | 739 ++++++++++++++++++++++---------------------- 1 file changed, 367 insertions(+), 372 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 3ad8fc68e623..e2b584354731 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -500,410 +500,405 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, */ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { + substring_t args[MAX_OPT_ARGS]; + unsigned long option; char *string; - int rc; - - { - substring_t args[MAX_OPT_ARGS]; - unsigned long option; - int token; + int token, rc; - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); - - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + token = match_token(p, nfs_mount_option_tokens, args); + switch (token) { /* * boolean options: foo/nofoo */ - case Opt_soft: - ctx->flags |= NFS_MOUNT_SOFT; - ctx->flags &= ~NFS_MOUNT_SOFTERR; - break; - case Opt_softerr: - ctx->flags |= NFS_MOUNT_SOFTERR; - ctx->flags &= ~NFS_MOUNT_SOFT; - break; - case Opt_hard: - ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); - break; - case Opt_posix: - ctx->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - ctx->flags &= ~NFS_MOUNT_POSIX; - break; - case Opt_cto: - ctx->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - ctx->flags |= NFS_MOUNT_NOCTO; - break; - case Opt_ac: - ctx->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - ctx->flags |= NFS_MOUNT_NOAC; - break; - case Opt_lock: - ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_udp: - ctx->flags &= ~NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_tcp: - ctx->flags |= NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_rdma: - ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ - ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); - break; - case Opt_acl: - ctx->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - ctx->flags |= NFS_MOUNT_NOACL; - break; - case Opt_rdirplus: - ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - ctx->flags |= NFS_MOUNT_NORDIRPLUS; - break; - case Opt_sharecache: - ctx->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - ctx->flags |= NFS_MOUNT_UNSHARED; - break; - case Opt_resvport: - ctx->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - ctx->flags |= NFS_MOUNT_NORESVPORT; - break; - case Opt_fscache: - ctx->options |= NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_nofscache: - ctx->options &= ~NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_migration: - ctx->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - ctx->options &= ~NFS_OPTION_MIGRATION; - break; + case Opt_soft: + ctx->flags |= NFS_MOUNT_SOFT; + ctx->flags &= ~NFS_MOUNT_SOFTERR; + break; + case Opt_softerr: + ctx->flags |= NFS_MOUNT_SOFTERR; + ctx->flags &= ~NFS_MOUNT_SOFT; + break; + case Opt_hard: + ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + break; + case Opt_posix: + ctx->flags |= NFS_MOUNT_POSIX; + break; + case Opt_noposix: + ctx->flags &= ~NFS_MOUNT_POSIX; + break; + case Opt_cto: + ctx->flags &= ~NFS_MOUNT_NOCTO; + break; + case Opt_nocto: + ctx->flags |= NFS_MOUNT_NOCTO; + break; + case Opt_ac: + ctx->flags &= ~NFS_MOUNT_NOAC; + break; + case Opt_noac: + ctx->flags |= NFS_MOUNT_NOAC; + break; + case Opt_lock: + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_nolock: + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_udp: + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_tcp: + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_rdma: + ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(p); + break; + case Opt_acl: + ctx->flags &= ~NFS_MOUNT_NOACL; + break; + case Opt_noacl: + ctx->flags |= NFS_MOUNT_NOACL; + break; + case Opt_rdirplus: + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; + break; + case Opt_nordirplus: + ctx->flags |= NFS_MOUNT_NORDIRPLUS; + break; + case Opt_sharecache: + ctx->flags &= ~NFS_MOUNT_UNSHARED; + break; + case Opt_nosharecache: + ctx->flags |= NFS_MOUNT_UNSHARED; + break; + case Opt_resvport: + ctx->flags &= ~NFS_MOUNT_NORESVPORT; + break; + case Opt_noresvport: + ctx->flags |= NFS_MOUNT_NORESVPORT; + break; + case Opt_fscache: + ctx->options |= NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; + break; + case Opt_nofscache: + ctx->options &= ~NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; + break; + case Opt_migration: + ctx->options |= NFS_OPTION_MIGRATION; + break; + case Opt_nomigration: + ctx->options &= ~NFS_OPTION_MIGRATION; + break; /* * options that take numeric values */ - case Opt_port: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - ctx->nfs_server.port = option; - break; - case Opt_rsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->rsize = option; - break; - case Opt_wsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->wsize = option; - break; - case Opt_bsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->bsize = option; - break; - case Opt_timeo: - if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) - goto out_invalid_value; - ctx->timeo = option; - break; - case Opt_retrans: - if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) - goto out_invalid_value; - ctx->retrans = option; - break; - case Opt_acregmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acregmin = option; - break; - case Opt_acregmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acregmax = option; - break; - case Opt_acdirmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acdirmin = option; - break; - case Opt_acdirmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acdirmax = option; - break; - case Opt_actimeo: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acregmin = ctx->acregmax = + case Opt_port: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + ctx->nfs_server.port = option; + break; + case Opt_rsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->rsize = option; + break; + case Opt_wsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->wsize = option; + break; + case Opt_bsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->bsize = option; + break; + case Opt_timeo: + if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) + goto out_invalid_value; + ctx->timeo = option; + break; + case Opt_retrans: + if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) + goto out_invalid_value; + ctx->retrans = option; + break; + case Opt_acregmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acregmin = option; + break; + case Opt_acregmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acregmax = option; + break; + case Opt_acdirmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acdirmin = option; + break; + case Opt_acdirmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acdirmax = option; + break; + case Opt_actimeo: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acregmin = ctx->acregmax = ctx->acdirmin = ctx->acdirmax = option; - break; - case Opt_namelen: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->namlen = option; - break; - case Opt_mountport: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - ctx->mount_server.port = option; - break; - case Opt_mountvers: - if (nfs_get_option_ul(args, &option) || - option < NFS_MNT_VERSION || - option > NFS_MNT3_VERSION) - goto out_invalid_value; - ctx->mount_server.version = option; - break; - case Opt_minorversion: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - if (option > NFS4_MAX_MINOR_VERSION) - goto out_invalid_value; - ctx->minorversion = option; - break; + break; + case Opt_namelen: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->namlen = option; + break; + case Opt_mountport: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + ctx->mount_server.port = option; + break; + case Opt_mountvers: + if (nfs_get_option_ul(args, &option) || + option < NFS_MNT_VERSION || + option > NFS_MNT3_VERSION) + goto out_invalid_value; + ctx->mount_server.version = option; + break; + case Opt_minorversion: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + if (option > NFS4_MAX_MINOR_VERSION) + goto out_invalid_value; + ctx->minorversion = option; + break; /* * options that take text values */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_version_string(string, ctx, args); - kfree(string); - if (!rc) - goto out_invalid_value; + case Opt_nfsvers: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_version_string(string, ctx, args); + kfree(string); + if (!rc) + goto out_invalid_value; + break; + case Opt_sec: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_security_flavors(string, ctx); + kfree(string); + if (!rc) { + dfprintk(MOUNT, "NFS: unrecognized " + "security flavor\n"); + return -EINVAL; + } + break; + case Opt_proto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + + ctx->protofamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + ctx->protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; - case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_security_flavors(string, ctx); - kfree(string); - if (!rc) { - dfprintk(MOUNT, "NFS: unrecognized " - "security flavor\n"); - return -EINVAL; - } + case Opt_xprt_tcp6: + ctx->protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); - - ctx->protofamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - ctx->protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - ctx->flags &= ~NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - ctx->protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - ctx->flags |= NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma6: - ctx->protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_rdma: - /* vector side protocols to TCP */ - ctx->flags |= NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); - break; - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - kfree(string); - return -EINVAL; - } - kfree(string); + case Opt_xprt_rdma6: + ctx->protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_rdma: + /* vector side protocols to TCP */ + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(string); break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); kfree(string); + return -EINVAL; + } + kfree(string); + break; + case Opt_mountproto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + kfree(string); - ctx->mountfamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - ctx->mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - ctx->mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma: /* not used for side protocols */ - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - return -EINVAL; - } - break; - case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->nfs_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) - &ctx->nfs_server.address, - sizeof(ctx->nfs_server.address)); - kfree(string); - if (ctx->nfs_server.addrlen == 0) - goto out_invalid_address; - break; - case Opt_clientaddr: - if (nfs_get_option_str(args, &ctx->client_address)) - goto out_nomem; + ctx->mountfamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + ctx->mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_xprt_tcp6: + ctx->mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_xprt_rdma: /* not used for side protocols */ + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); + return -EINVAL; + } + break; + case Opt_addr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + ctx->nfs_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), + (struct sockaddr *) + &ctx->nfs_server.address, + sizeof(ctx->nfs_server.address)); + kfree(string); + if (ctx->nfs_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_clientaddr: + if (nfs_get_option_str(args, &ctx->client_address)) + goto out_nomem; + break; + case Opt_mounthost: + if (nfs_get_option_str(args, + &ctx->mount_server.hostname)) + goto out_nomem; + break; + case Opt_mountaddr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + ctx->mount_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), + (struct sockaddr *) + &ctx->mount_server.address, + sizeof(ctx->mount_server.address)); + kfree(string); + if (ctx->mount_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_nconnect: + if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) + goto out_invalid_value; + ctx->nfs_server.nconnect = option; + break; + case Opt_lookupcache: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_lookupcache_tokens, args); + kfree(string); + switch (token) { + case Opt_lookupcache_all: + ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; - case Opt_mounthost: - if (nfs_get_option_str(args, - &ctx->mount_server.hostname)) - goto out_nomem; + case Opt_lookupcache_positive: + ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; break; - case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->mount_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) - &ctx->mount_server.address, - sizeof(ctx->mount_server.address)); - kfree(string); - if (ctx->mount_server.addrlen == 0) - goto out_invalid_address; + case Opt_lookupcache_none: + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; - case Opt_nconnect: - if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; - ctx->nfs_server.nconnect = option; + default: + dfprintk(MOUNT, "NFS: invalid " + "lookupcache argument\n"); + return -EINVAL; + }; + break; + case Opt_fscache_uniq: + if (nfs_get_option_str(args, &ctx->fscache_uniq)) + goto out_nomem; + ctx->options |= NFS_OPTION_FSCACHE; + break; + case Opt_local_lock: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, nfs_local_lock_tokens, + args); + kfree(string); + switch (token) { + case Opt_local_lock_all: + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); break; - case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { - case Opt_lookupcache_all: - ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); - break; - case Opt_lookupcache_positive: - ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; - ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; - break; - case Opt_lookupcache_none: - ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "lookupcache argument\n"); - return -EINVAL; - }; + case Opt_local_lock_flock: + ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &ctx->fscache_uniq)) - goto out_nomem; - ctx->options |= NFS_OPTION_FSCACHE; + case Opt_local_lock_posix: + ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; break; - case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, - args); - kfree(string); - switch (token) { - case Opt_local_lock_all: - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_local_lock_flock: - ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; - break; - case Opt_local_lock_posix: - ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; - break; - case Opt_local_lock_none: - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "local_lock argument\n"); - return -EINVAL; - }; + case Opt_local_lock_none: + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); break; + default: + dfprintk(MOUNT, "NFS: invalid " + "local_lock argument\n"); + return -EINVAL; + }; + break; /* * Special options */ - case Opt_sloppy: - ctx->sloppy = 1; - dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); - break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option " - "'%s'\n", p); - break; + case Opt_sloppy: + ctx->sloppy = 1; + dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); + break; + case Opt_userspace: + case Opt_deprecated: + dfprintk(MOUNT, "NFS: ignoring mount option " + "'%s'\n", p); + break; - default: - dfprintk(MOUNT, "NFS: unrecognized mount option " - "'%s'\n", p); - return -EINVAL; - } + default: + dfprintk(MOUNT, "NFS: unrecognized mount option " + "'%s'\n", p); + return -EINVAL; } return 0; From patchwork Fri Sep 13 12:17:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144609 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 75DB014E5 for ; Fri, 13 Sep 2019 12:18:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 566242089F for ; Fri, 13 Sep 2019 12:18:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388188AbfIMMSk (ORCPT ); Fri, 13 Sep 2019 08:18:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41464 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729752AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 91C8C875221; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5BCAF5C207; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 1AC7B20ED4; Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 21/26] NFS: Add a small buffer in nfs_fs_context to avoid string dup Date: Fri, 13 Sep 2019 08:17:43 -0400 Message-Id: <20190913121748.25391-22-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.68]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Add a small buffer in nfs_fs_context to avoid string duplication when parsing numbers. Also make the parsing function wrapper place the parsed integer directly in the appropriate nfs_fs_context struct member. Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/fs_context.c | 98 +++++++++++++++++++++------------------------ fs/nfs/internal.h | 2 + 2 files changed, 48 insertions(+), 52 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index e2b584354731..ad502b37a3f3 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -468,27 +468,38 @@ static int nfs_get_option_str(substring_t args[], char **option) return !*option; } -static int nfs_get_option_ul(substring_t args[], unsigned long *option) +static int nfs_get_option_ui(struct nfs_fs_context *ctx, + substring_t args[], unsigned int *option) { - int rc; - char *string; + match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); + return kstrtouint(ctx->buf, 10, option); +} - string = match_strdup(args); - if (string == NULL) - return -ENOMEM; - rc = kstrtoul(string, 10, option); - kfree(string); +static int nfs_get_option_ui_bound(struct nfs_fs_context *ctx, + substring_t args[], unsigned int *option, + unsigned int l_bound, unsigned u_bound) +{ + int ret; - return rc; + match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); + ret = kstrtouint(ctx->buf, 10, option); + if (ret < 0) + return ret; + if (*option < l_bound || *option > u_bound) + return -ERANGE; + return 0; } -static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, - unsigned long l_bound, unsigned long u_bound) +static int nfs_get_option_us_bound(struct nfs_fs_context *ctx, + substring_t args[], unsigned short *option, + unsigned short l_bound, + unsigned short u_bound) { int ret; - ret = nfs_get_option_ul(args, option); - if (ret != 0) + match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); + ret = kstrtou16(ctx->buf, 10, option); + if (ret < 0) return ret; if (*option < l_bound || *option > u_bound) return -ERANGE; @@ -501,7 +512,6 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { substring_t args[MAX_OPT_ARGS]; - unsigned long option; char *string; int token, rc; @@ -609,86 +619,70 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) * options that take numeric values */ case Opt_port: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) + if (nfs_get_option_ui_bound(ctx, args, &ctx->nfs_server.port, + 0, USHRT_MAX)) goto out_invalid_value; - ctx->nfs_server.port = option; break; case Opt_rsize: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->rsize)) goto out_invalid_value; - ctx->rsize = option; break; case Opt_wsize: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->wsize)) goto out_invalid_value; - ctx->wsize = option; break; case Opt_bsize: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->bsize)) goto out_invalid_value; - ctx->bsize = option; break; case Opt_timeo: - if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) + if (nfs_get_option_ui_bound(ctx, args, &ctx->timeo, 1, INT_MAX)) goto out_invalid_value; - ctx->timeo = option; break; case Opt_retrans: - if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) + if (nfs_get_option_ui_bound(ctx, args, &ctx->retrans, 0, INT_MAX)) goto out_invalid_value; - ctx->retrans = option; break; case Opt_acregmin: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acregmin)) goto out_invalid_value; - ctx->acregmin = option; break; case Opt_acregmax: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acregmax)) goto out_invalid_value; - ctx->acregmax = option; break; case Opt_acdirmin: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acdirmin)) goto out_invalid_value; - ctx->acdirmin = option; break; case Opt_acdirmax: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) goto out_invalid_value; - ctx->acdirmax = option; break; case Opt_actimeo: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) goto out_invalid_value; ctx->acregmin = ctx->acregmax = - ctx->acdirmin = ctx->acdirmax = option; + ctx->acdirmin = ctx->acdirmax; break; case Opt_namelen: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->namlen)) goto out_invalid_value; - ctx->namlen = option; break; case Opt_mountport: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) + if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.port, + 0, USHRT_MAX)) goto out_invalid_value; - ctx->mount_server.port = option; break; case Opt_mountvers: - if (nfs_get_option_ul(args, &option) || - option < NFS_MNT_VERSION || - option > NFS_MNT3_VERSION) + if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.version, + NFS_MNT_VERSION, NFS_MNT3_VERSION)) goto out_invalid_value; - ctx->mount_server.version = option; break; case Opt_minorversion: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - if (option > NFS4_MAX_MINOR_VERSION) + if (nfs_get_option_ui_bound(ctx, args, &ctx->minorversion, + 0, NFS4_MAX_MINOR_VERSION)) goto out_invalid_value; - ctx->minorversion = option; break; /* @@ -820,9 +814,9 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_invalid_address; break; case Opt_nconnect: - if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) + if (nfs_get_option_us_bound(ctx, args, &ctx->nfs_server.nconnect, + 1, NFS_MAX_CONNECTIONS)) goto out_invalid_value; - ctx->nfs_server.nconnect = option; break; case Opt_lookupcache: string = match_strdup(args); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index d084182f8e43..11df0d1f9fd4 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -130,6 +130,8 @@ struct nfs_fs_context { void *lsm_opts; struct net *net; + + char buf[32]; /* Parse buffer */ }; /* mount_clnt.c */ From patchwork Fri Sep 13 12:17:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144607 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9CFD276 for ; 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Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 22/26] NFS: Do some tidying of the parsing code Date: Fri, 13 Sep 2019 08:17:44 -0400 Message-Id: <20190913121748.25391-23-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.69]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Do some tidying of the parsing code, including: (*) Returning 0/error rather than true/false. (*) Putting the nfs_fs_context pointer first in some arg lists. (*) Unwrap some lines that will now fit on one line. (*) Provide unioned sockaddr/sockaddr_storage fields to avoid casts. (*) nfs_parse_devname() can paste its return values directly into the nfs_fs_context struct as that's where the caller puts them. Signed-off-by: David Howells Signed-off-by: Al Viro --- fs/nfs/fs_context.c | 128 +++++++++++++++++++------------------------- fs/nfs/internal.h | 16 ++++-- fs/nfs/super.c | 2 +- 3 files changed, 67 insertions(+), 79 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index ad502b37a3f3..96720cfd1065 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -343,8 +343,9 @@ static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) * Add 'flavor' to 'auth_info' if not already present. * Returns true if 'flavor' ends up in the list, false otherwise */ -static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, - rpc_authflavor_t flavor) +static int nfs_auth_info_add(struct nfs_fs_context *ctx, + struct nfs_auth_info *auth_info, + rpc_authflavor_t flavor) { unsigned int i; unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); @@ -352,26 +353,27 @@ static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, /* make sure this flavor isn't already in the list */ for (i = 0; i < auth_info->flavor_len; i++) { if (flavor == auth_info->flavors[i]) - return true; + return 0; } if (auth_info->flavor_len + 1 >= max_flavor_len) { dfprintk(MOUNT, "NFS: too many sec= flavors\n"); - return false; + return -EINVAL; } auth_info->flavors[auth_info->flavor_len++] = flavor; - return true; + return 0; } /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(char *value, struct nfs_fs_context *ctx) +static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) { substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; char *p; + int ret; dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); @@ -413,19 +415,20 @@ static int nfs_parse_security_flavors(char *value, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: sec= option '%s' not recognized\n", p); - return 0; + return -EINVAL; } - if (!nfs_auth_info_add(&ctx->auth_info, pseudoflavor)) - return 0; + ret = nfs_auth_info_add(ctx, &ctx->auth_info, pseudoflavor); + if (ret < 0) + return ret; } - return 1; + return 0; } -static int nfs_parse_version_string(char *string, - struct nfs_fs_context *ctx, - substring_t *args) +static int nfs_parse_version_string(struct nfs_fs_context *ctx, + char *string, + substring_t *args) { ctx->flags &= ~NFS_MOUNT_VER3; switch (match_token(string, nfs_vers_tokens, args)) { @@ -456,9 +459,10 @@ static int nfs_parse_version_string(char *string, ctx->minorversion = 2; break; default: - return 0; + dfprintk(MOUNT, "NFS: Unsupported NFS version\n"); + return -EINVAL; } - return 1; + return 0; } static int nfs_get_option_str(substring_t args[], char **option) @@ -513,7 +517,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { substring_t args[MAX_OPT_ARGS]; char *string; - int token, rc; + int token, ret; dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); @@ -553,13 +557,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) break; case Opt_lock: ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_nolock: ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_udp: ctx->flags &= ~NFS_MOUNT_TCP; @@ -692,29 +694,25 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_version_string(string, ctx, args); + ret = nfs_parse_version_string(ctx, string, args); kfree(string); - if (!rc) - goto out_invalid_value; + if (ret < 0) + return ret; break; case Opt_sec: string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_security_flavors(string, ctx); + ret = nfs_parse_security_flavors(ctx, string); kfree(string); - if (!rc) { - dfprintk(MOUNT, "NFS: unrecognized " - "security flavor\n"); - return -EINVAL; - } + if (ret < 0) + return ret; break; case Opt_proto: string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); + token = match_token(string, nfs_xprt_protocol_tokens, args); ctx->protofamily = AF_INET; switch (token) { @@ -742,9 +740,8 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) xprt_load_transport(string); break; default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); kfree(string); + dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } kfree(string); @@ -753,8 +750,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); + token = match_token(string, nfs_xprt_protocol_tokens, args); kfree(string); ctx->mountfamily = AF_INET; @@ -773,8 +769,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) break; case Opt_xprt_rdma: /* not used for side protocols */ default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); + dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } break; @@ -784,9 +779,8 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_nomem; ctx->nfs_server.addrlen = rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) &ctx->nfs_server.address, - sizeof(ctx->nfs_server.address)); + sizeof(ctx->nfs_server._address)); kfree(string); if (ctx->nfs_server.addrlen == 0) goto out_invalid_address; @@ -796,8 +790,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_nomem; break; case Opt_mounthost: - if (nfs_get_option_str(args, - &ctx->mount_server.hostname)) + if (nfs_get_option_str(args, &ctx->mount_server.hostname)) goto out_nomem; break; case Opt_mountaddr: @@ -806,9 +799,8 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_nomem; ctx->mount_server.addrlen = rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) &ctx->mount_server.address, - sizeof(ctx->mount_server.address)); + sizeof(ctx->mount_server._address)); kfree(string); if (ctx->mount_server.addrlen == 0) goto out_invalid_address; @@ -822,8 +814,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, - nfs_lookupcache_tokens, args); + token = match_token(string, nfs_lookupcache_tokens, args); kfree(string); switch (token) { case Opt_lookupcache_all: @@ -837,10 +828,9 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: - dfprintk(MOUNT, "NFS: invalid " - "lookupcache argument\n"); + dfprintk(MOUNT, "NFS: invalid lookupcache argument\n"); return -EINVAL; - }; + } break; case Opt_fscache_uniq: if (nfs_get_option_str(args, &ctx->fscache_uniq)) @@ -851,8 +841,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, - args); + token = match_token(string, nfs_local_lock_tokens, args); kfree(string); switch (token) { case Opt_local_lock_all: @@ -870,8 +859,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) NFS_MOUNT_LOCAL_FCNTL); break; default: - dfprintk(MOUNT, "NFS: invalid " - "local_lock argument\n"); + dfprintk(MOUNT, "NFS: invalid local_lock argument\n"); return -EINVAL; }; break; @@ -885,13 +873,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) break; case Opt_userspace: case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option " - "'%s'\n", p); + dfprintk(MOUNT, "NFS: ignoring mount option '%s'\n", p); break; default: - dfprintk(MOUNT, "NFS: unrecognized mount option " - "'%s'\n", p); + dfprintk(MOUNT, "NFS: unrecognized mount option '%s'\n", p); return -EINVAL; } @@ -951,15 +937,15 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * families in the addr=/mountaddr= options. */ if (ctx->protofamily != AF_UNSPEC && - ctx->protofamily != ctx->nfs_server.address.ss_family) + ctx->protofamily != ctx->nfs_server.address.sa_family) goto out_proto_mismatch; if (ctx->mountfamily != AF_UNSPEC) { if (ctx->mount_server.addrlen) { - if (ctx->mountfamily != ctx->mount_server.address.ss_family) + if (ctx->mountfamily != ctx->mount_server.address.sa_family) goto out_mountproto_mismatch; } else { - if (ctx->mountfamily != ctx->nfs_server.address.ss_family) + if (ctx->mountfamily != ctx->nfs_server.address.sa_family) goto out_mountproto_mismatch; } } @@ -995,9 +981,9 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * * Note: caller frees hostname and export path, even on error. */ -static int nfs_parse_devname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) +static int nfs_parse_devname(struct nfs_fs_context *ctx, + const char *dev_name, + size_t maxnamlen, size_t maxpathlen) { size_t len; char *end; @@ -1033,17 +1019,17 @@ static int nfs_parse_devname(const char *dev_name, goto out_hostname; /* N.B. caller will free nfs_server.hostname in all cases */ - *hostname = kstrndup(dev_name, len, GFP_KERNEL); - if (*hostname == NULL) + ctx->nfs_server.hostname = kmemdup_nul(dev_name, len, GFP_KERNEL); + if (!ctx->nfs_server.hostname) goto out_nomem; len = strlen(++end); if (len > maxpathlen) goto out_path; - *export_path = kstrndup(end, len, GFP_KERNEL); - if (!*export_path) + ctx->nfs_server.export_path = kmemdup_nul(end, len, GFP_KERNEL); + if (!ctx->nfs_server.export_path) goto out_nomem; - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", ctx->nfs_server.export_path); return 0; out_bad_devname: @@ -1064,7 +1050,7 @@ static int nfs_parse_devname(const char *dev_name, } /* - * Validate the NFS2/NFS3 mount data + * Parse monolithic NFS2/NFS3 mount data * - fills in the mount root filehandle * * For option strings, user space handles the following behaviors: @@ -1393,11 +1379,7 @@ int nfs_validate_text_mount_data(void *options, nfs_set_port(sap, &ctx->nfs_server.port, port); - return nfs_parse_devname(dev_name, - &ctx->nfs_server.hostname, - max_namelen, - &ctx->nfs_server.export_path, - max_pathlen); + return nfs_parse_devname(ctx, dev_name, max_namelen, max_pathlen); #if !IS_ENABLED(CONFIG_NFS_V4) out_v4_not_compiled: diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 11df0d1f9fd4..caaf0af1bc7f 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -90,11 +90,11 @@ struct nfs_client_initdata { * In-kernel mount arguments */ struct nfs_fs_context { - int flags; + unsigned int flags; /* NFS{,4}_MOUNT_* flags */ unsigned int rsize, wsize; unsigned int timeo, retrans; - unsigned int acregmin, acregmax, - acdirmin, acdirmax; + unsigned int acregmin, acregmax; + unsigned int acdirmin, acdirmax; unsigned int namlen; unsigned int options; unsigned int bsize; @@ -110,7 +110,10 @@ struct nfs_fs_context { bool sloppy; struct { - struct sockaddr_storage address; + union { + struct sockaddr address; + struct sockaddr_storage _address; + }; size_t addrlen; char *hostname; u32 version; @@ -119,7 +122,10 @@ struct nfs_fs_context { } mount_server; struct { - struct sockaddr_storage address; + union { + struct sockaddr address; + struct sockaddr_storage _address; + }; size_t addrlen; char *hostname; char *export_path; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index abd99ed00e39..d44de53c17a6 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -816,7 +816,7 @@ static int nfs_request_mount(struct nfs_fs_context *cfg, /* * Construct the mount server's address. */ - if (cfg->mount_server.address.ss_family == AF_UNSPEC) { + if (cfg->mount_server.address.sa_family == AF_UNSPEC) { memcpy(request.sap, &cfg->nfs_server.address, cfg->nfs_server.addrlen); cfg->mount_server.addrlen = cfg->nfs_server.addrlen; From patchwork Fri Sep 13 12:17:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144587 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E6D2C1395 for ; Fri, 13 Sep 2019 12:18:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C5C9320CC7 for ; Fri, 13 Sep 2019 12:18:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388096AbfIMMSV (ORCPT ); Fri, 13 Sep 2019 08:18:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41262 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729796AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9B2E6309174E; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 62CC35D71C; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 266C920EF2; Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 23/26] NFS: rename nfs_fs_context pointer arg in a few functions Date: Fri, 13 Sep 2019 08:17:45 -0400 Message-Id: <20190913121748.25391-24-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Split out from commit "NFS: Add fs_context support." Rename cfg to ctx in nfs_init_server(), nfs_verify_authflavors(), and nfs_request_mount(). No functional changes. Signed-off-by: Scott Mayhew --- fs/nfs/client.c | 62 ++++++++++++++++++++++++------------------------- fs/nfs/super.c | 54 +++++++++++++++++++++--------------------- 2 files changed, 58 insertions(+), 58 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 1afd796a3706..511d1d629786 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -648,27 +648,27 @@ EXPORT_SYMBOL_GPL(nfs_init_client); * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_fs_context *cfg, + const struct nfs_fs_context *ctx, struct nfs_subversion *nfs_mod) { struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { - .hostname = cfg->nfs_server.hostname, - .addr = (const struct sockaddr *)&cfg->nfs_server.address, - .addrlen = cfg->nfs_server.addrlen, + .hostname = ctx->nfs_server.hostname, + .addr = (const struct sockaddr *)&ctx->nfs_server.address, + .addrlen = ctx->nfs_server.addrlen, .nfs_mod = nfs_mod, - .proto = cfg->nfs_server.protocol, - .net = cfg->net, + .proto = ctx->nfs_server.protocol, + .net = ctx->net, .timeparms = &timeparms, .cred = server->cred, - .nconnect = cfg->nfs_server.nconnect, + .nconnect = ctx->nfs_server.nconnect, }; struct nfs_client *clp; int error; - nfs_init_timeout_values(&timeparms, cfg->nfs_server.protocol, - cfg->timeo, cfg->retrans); - if (cfg->flags & NFS_MOUNT_NORESVPORT) + nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, + ctx->timeo, ctx->retrans); + if (ctx->flags & NFS_MOUNT_NORESVPORT) set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ @@ -679,46 +679,46 @@ static int nfs_init_server(struct nfs_server *server, server->nfs_client = clp; /* Initialise the client representation from the mount data */ - server->flags = cfg->flags; - server->options = cfg->options; + server->flags = ctx->flags; + server->options = ctx->options; server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; - if (cfg->rsize) - server->rsize = nfs_block_size(cfg->rsize, NULL); - if (cfg->wsize) - server->wsize = nfs_block_size(cfg->wsize, NULL); + if (ctx->rsize) + server->rsize = nfs_block_size(ctx->rsize, NULL); + if (ctx->wsize) + server->wsize = nfs_block_size(ctx->wsize, NULL); - server->acregmin = cfg->acregmin * HZ; - server->acregmax = cfg->acregmax * HZ; - server->acdirmin = cfg->acdirmin * HZ; - server->acdirmax = cfg->acdirmax * HZ; + server->acregmin = ctx->acregmin * HZ; + server->acregmax = ctx->acregmax * HZ; + server->acdirmin = ctx->acdirmin * HZ; + server->acdirmax = ctx->acdirmax * HZ; /* Start lockd here, before we might error out */ error = nfs_start_lockd(server); if (error < 0) goto error; - server->port = cfg->nfs_server.port; - server->auth_info = cfg->auth_info; + server->port = ctx->nfs_server.port; + server->auth_info = ctx->auth_info; error = nfs_init_server_rpcclient(server, &timeparms, - cfg->selected_flavor); + ctx->selected_flavor); if (error < 0) goto error; /* Preserve the values of mount_server-related mount options */ - if (cfg->mount_server.addrlen) { - memcpy(&server->mountd_address, &cfg->mount_server.address, - cfg->mount_server.addrlen); - server->mountd_addrlen = cfg->mount_server.addrlen; + if (ctx->mount_server.addrlen) { + memcpy(&server->mountd_address, &ctx->mount_server.address, + ctx->mount_server.addrlen); + server->mountd_addrlen = ctx->mount_server.addrlen; } - server->mountd_version = cfg->mount_server.version; - server->mountd_port = cfg->mount_server.port; - server->mountd_protocol = cfg->mount_server.protocol; + server->mountd_version = ctx->mount_server.version; + server->mountd_port = ctx->mount_server.port; + server->mountd_protocol = ctx->mount_server.protocol; - server->namelen = cfg->namlen; + server->namelen = ctx->namlen; return 0; error: diff --git a/fs/nfs/super.c b/fs/nfs/super.c index d44de53c17a6..9aa27093d8b6 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -726,11 +726,11 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, EXPORT_SYMBOL_GPL(nfs_auth_info_match); /* - * Ensure that a specified authtype in cfg->auth_info is supported by - * the server. Returns 0 and sets cfg->selected_flavor if it's ok, and + * Ensure that a specified authtype in ctx->auth_info is supported by + * the server. Returns 0 and sets ctx->selected_flavor if it's ok, and * -EACCES if not. */ -static int nfs_verify_authflavors(struct nfs_fs_context *cfg, +static int nfs_verify_authflavors(struct nfs_fs_context *ctx, rpc_authflavor_t *server_authlist, unsigned int count) { @@ -753,7 +753,7 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, for (i = 0; i < count; i++) { flavor = server_authlist[i]; - if (nfs_auth_info_match(&cfg->auth_info, flavor)) + if (nfs_auth_info_match(&ctx->auth_info, flavor)) goto out; if (flavor == RPC_AUTH_NULL) @@ -761,7 +761,7 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, } if (found_auth_null) { - flavor = cfg->auth_info.flavors[0]; + flavor = ctx->auth_info.flavors[0]; goto out; } @@ -770,8 +770,8 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, return -EACCES; out: - cfg->selected_flavor = flavor; - dfprintk(MOUNT, "NFS: using auth flavor %u\n", cfg->selected_flavor); + ctx->selected_flavor = flavor; + dfprintk(MOUNT, "NFS: using auth flavor %u\n", ctx->selected_flavor); return 0; } @@ -779,50 +779,50 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_request_mount(struct nfs_fs_context *cfg, +static int nfs_request_mount(struct nfs_fs_context *ctx, struct nfs_fh *root_fh, rpc_authflavor_t *server_authlist, unsigned int *server_authlist_len) { struct nfs_mount_request request = { .sap = (struct sockaddr *) - &cfg->mount_server.address, - .dirpath = cfg->nfs_server.export_path, - .protocol = cfg->mount_server.protocol, + &ctx->mount_server.address, + .dirpath = ctx->nfs_server.export_path, + .protocol = ctx->mount_server.protocol, .fh = root_fh, - .noresvport = cfg->flags & NFS_MOUNT_NORESVPORT, + .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, - .net = cfg->net, + .net = ctx->net, }; int status; - if (cfg->mount_server.version == 0) { - switch (cfg->version) { + if (ctx->mount_server.version == 0) { + switch (ctx->version) { default: - cfg->mount_server.version = NFS_MNT3_VERSION; + ctx->mount_server.version = NFS_MNT3_VERSION; break; case 2: - cfg->mount_server.version = NFS_MNT_VERSION; + ctx->mount_server.version = NFS_MNT_VERSION; } } - request.version = cfg->mount_server.version; + request.version = ctx->mount_server.version; - if (cfg->mount_server.hostname) - request.hostname = cfg->mount_server.hostname; + if (ctx->mount_server.hostname) + request.hostname = ctx->mount_server.hostname; else - request.hostname = cfg->nfs_server.hostname; + request.hostname = ctx->nfs_server.hostname; /* * Construct the mount server's address. */ - if (cfg->mount_server.address.sa_family == AF_UNSPEC) { - memcpy(request.sap, &cfg->nfs_server.address, - cfg->nfs_server.addrlen); - cfg->mount_server.addrlen = cfg->nfs_server.addrlen; + if (ctx->mount_server.address.sa_family == AF_UNSPEC) { + memcpy(request.sap, &ctx->nfs_server.address, + ctx->nfs_server.addrlen); + ctx->mount_server.addrlen = ctx->nfs_server.addrlen; } - request.salen = cfg->mount_server.addrlen; - nfs_set_port(request.sap, &cfg->mount_server.port, 0); + request.salen = ctx->mount_server.addrlen; + nfs_set_port(request.sap, &ctx->mount_server.port, 0); /* * Now ask the mount server to map our export path From patchwork Fri Sep 13 12:17:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144597 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8F59916C1 for ; Fri, 13 Sep 2019 12:18:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 651CC2089F for ; Fri, 13 Sep 2019 12:18:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388084AbfIMMSU (ORCPT ); Fri, 13 Sep 2019 08:18:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41270 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729805AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B1EA23091785; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 552455D717; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 2C08B20F24; Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 24/26] NFS: Convert mount option parsing to use functionality from fs_parser.h Date: Fri, 13 Sep 2019 08:17:46 -0400 Message-Id: <20190913121748.25391-25-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Split out from commit "NFS: Add fs_context support." Convert existing mount option definitions to fs_parameter_enum's and fs_parameter_spec's. Parse mount options using fs_parse() and lookup_constant(). Notes: 1) Fixed a typo in the udp6 definition in nfs_xprt_protocol_tokens from the original commit. 2) fs_parse() expects an fs_context as the first arg so that any errors can be logged to the fs_context. We're passing NULL for the fs_context (this will change in commit "NFS: Add fs_context support.") which is okay as it will cause logfc() to do a printk() instead. 3) fs_parse() expects an fs_paramter as the third arg. We're building an fs_parameter manually in nfs_fs_context_parse_option(), which will go away in commit "NFS: Add fs_context support.". Signed-off-by: Scott Mayhew --- fs/nfs/fs_context.c | 789 ++++++++++++++++++++------------------------ 1 file changed, 365 insertions(+), 424 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 96720cfd1065..9a3162055d5d 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -11,7 +11,8 @@ #include #include -#include +#include +#include #include #include #include @@ -28,218 +29,215 @@ #define NFS_MAX_CONNECTIONS 16 -enum { - /* Mount options that take no arguments */ - Opt_soft, Opt_softerr, Opt_hard, - Opt_posix, Opt_noposix, - Opt_cto, Opt_nocto, - Opt_ac, Opt_noac, - Opt_lock, Opt_nolock, - Opt_udp, Opt_tcp, Opt_rdma, - Opt_acl, Opt_noacl, - Opt_rdirplus, Opt_nordirplus, - Opt_sharecache, Opt_nosharecache, - Opt_resvport, Opt_noresvport, - Opt_fscache, Opt_nofscache, - Opt_migration, Opt_nomigration, - - /* Mount options that take integer arguments */ - Opt_port, - Opt_rsize, Opt_wsize, Opt_bsize, - Opt_timeo, Opt_retrans, - Opt_acregmin, Opt_acregmax, - Opt_acdirmin, Opt_acdirmax, +enum nfs_param { + Opt_ac, + Opt_acdirmax, + Opt_acdirmin, + Opt_acl, + Opt_acregmax, + Opt_acregmin, Opt_actimeo, - Opt_namelen, + Opt_addr, + Opt_bg, + Opt_bsize, + Opt_clientaddr, + Opt_cto, + Opt_fg, + Opt_fscache, + Opt_hard, + Opt_intr, + Opt_local_lock, + Opt_lock, + Opt_lookupcache, + Opt_migration, + Opt_minorversion, + Opt_mountaddr, + Opt_mounthost, Opt_mountport, + Opt_mountproto, Opt_mountvers, - Opt_minorversion, - - /* Mount options that take string arguments */ - Opt_nfsvers, - Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, - Opt_addr, Opt_mountaddr, Opt_clientaddr, + Opt_namelen, Opt_nconnect, - Opt_lookupcache, - Opt_fscache_uniq, - Opt_local_lock, - - /* Special mount options */ - Opt_userspace, Opt_deprecated, Opt_sloppy, - - Opt_err + Opt_port, + Opt_posix, + Opt_proto, + Opt_rdirplus, + Opt_rdma, + Opt_resvport, + Opt_retrans, + Opt_retry, + Opt_rsize, + Opt_sec, + Opt_sharecache, + Opt_sloppy, + Opt_soft, + Opt_softerr, + Opt_source, + Opt_tcp, + Opt_timeo, + Opt_udp, + Opt_v, + Opt_vers, + Opt_wsize, }; -static const match_table_t nfs_mount_option_tokens = { - { Opt_userspace, "bg" }, - { Opt_userspace, "fg" }, - { Opt_userspace, "retry=%s" }, - - { Opt_sloppy, "sloppy" }, - - { Opt_soft, "soft" }, - { Opt_softerr, "softerr" }, - { Opt_hard, "hard" }, - { Opt_deprecated, "intr" }, - { Opt_deprecated, "nointr" }, - { Opt_posix, "posix" }, - { Opt_noposix, "noposix" }, - { Opt_cto, "cto" }, - { Opt_nocto, "nocto" }, - { Opt_ac, "ac" }, - { Opt_noac, "noac" }, - { Opt_lock, "lock" }, - { Opt_nolock, "nolock" }, - { Opt_udp, "udp" }, - { Opt_tcp, "tcp" }, - { Opt_rdma, "rdma" }, - { Opt_acl, "acl" }, - { Opt_noacl, "noacl" }, - { Opt_rdirplus, "rdirplus" }, - { Opt_nordirplus, "nordirplus" }, - { Opt_sharecache, "sharecache" }, - { Opt_nosharecache, "nosharecache" }, - { Opt_resvport, "resvport" }, - { Opt_noresvport, "noresvport" }, - { Opt_fscache, "fsc" }, - { Opt_nofscache, "nofsc" }, - { Opt_migration, "migration" }, - { Opt_nomigration, "nomigration" }, - - { Opt_port, "port=%s" }, - { Opt_rsize, "rsize=%s" }, - { Opt_wsize, "wsize=%s" }, - { Opt_bsize, "bsize=%s" }, - { Opt_timeo, "timeo=%s" }, - { Opt_retrans, "retrans=%s" }, - { Opt_acregmin, "acregmin=%s" }, - { Opt_acregmax, "acregmax=%s" }, - { Opt_acdirmin, "acdirmin=%s" }, - { Opt_acdirmax, "acdirmax=%s" }, - { Opt_actimeo, "actimeo=%s" }, - { Opt_namelen, "namlen=%s" }, - { Opt_mountport, "mountport=%s" }, - { Opt_mountvers, "mountvers=%s" }, - { Opt_minorversion, "minorversion=%s" }, - - { Opt_nfsvers, "nfsvers=%s" }, - { Opt_nfsvers, "vers=%s" }, - - { Opt_sec, "sec=%s" }, - { Opt_proto, "proto=%s" }, - { Opt_mountproto, "mountproto=%s" }, - { Opt_addr, "addr=%s" }, - { Opt_clientaddr, "clientaddr=%s" }, - { Opt_mounthost, "mounthost=%s" }, - { Opt_mountaddr, "mountaddr=%s" }, - - { Opt_nconnect, "nconnect=%s" }, - - { Opt_lookupcache, "lookupcache=%s" }, - { Opt_fscache_uniq, "fsc=%s" }, - { Opt_local_lock, "local_lock=%s" }, - - /* The following needs to be listed after all other options */ - { Opt_nfsvers, "v%s" }, - - { Opt_err, NULL } +static const struct fs_parameter_spec nfs_param_specs[] = { + fsparam_flag_no("ac", Opt_ac), + fsparam_u32 ("acdirmax", Opt_acdirmax), + fsparam_u32 ("acdirmin", Opt_acdirmin), + fsparam_flag_no("acl", Opt_acl), + fsparam_u32 ("acregmax", Opt_acregmax), + fsparam_u32 ("acregmin", Opt_acregmin), + fsparam_u32 ("actimeo", Opt_actimeo), + fsparam_string("addr", Opt_addr), + fsparam_flag ("bg", Opt_bg), + fsparam_u32 ("bsize", Opt_bsize), + fsparam_string("clientaddr", Opt_clientaddr), + fsparam_flag_no("cto", Opt_cto), + fsparam_flag ("fg", Opt_fg), + __fsparam(fs_param_is_string, "fsc", Opt_fscache, + fs_param_neg_with_no|fs_param_v_optional), + fsparam_flag ("hard", Opt_hard), + __fsparam(fs_param_is_flag, "intr", Opt_intr, + fs_param_neg_with_no|fs_param_deprecated), + fsparam_enum ("local_lock", Opt_local_lock), + fsparam_flag_no("lock", Opt_lock), + fsparam_enum ("lookupcache", Opt_lookupcache), + fsparam_flag_no("migration", Opt_migration), + fsparam_u32 ("minorversion", Opt_minorversion), + fsparam_string("mountaddr", Opt_mountaddr), + fsparam_string("mounthost", Opt_mounthost), + fsparam_u32 ("mountport", Opt_mountport), + fsparam_string("mountproto", Opt_mountproto), + fsparam_u32 ("mountvers", Opt_mountvers), + fsparam_u32 ("namlen", Opt_namelen), + fsparam_u32 ("nconnect", Opt_nconnect), + fsparam_string("nfsvers", Opt_vers), + fsparam_u32 ("port", Opt_port), + fsparam_flag_no("posix", Opt_posix), + fsparam_string("proto", Opt_proto), + fsparam_flag_no("rdirplus", Opt_rdirplus), + fsparam_flag ("rdma", Opt_rdma), + fsparam_flag_no("resvport", Opt_resvport), + fsparam_u32 ("retrans", Opt_retrans), + fsparam_string("retry", Opt_retry), + fsparam_u32 ("rsize", Opt_rsize), + fsparam_string("sec", Opt_sec), + fsparam_flag_no("sharecache", Opt_sharecache), + fsparam_flag ("sloppy", Opt_sloppy), + fsparam_flag ("soft", Opt_soft), + fsparam_flag ("softerr", Opt_softerr), + fsparam_string("source", Opt_source), + fsparam_flag ("tcp", Opt_tcp), + fsparam_u32 ("timeo", Opt_timeo), + fsparam_flag ("udp", Opt_udp), + fsparam_flag ("v2", Opt_v), + fsparam_flag ("v3", Opt_v), + fsparam_flag ("v4", Opt_v), + fsparam_flag ("v4.0", Opt_v), + fsparam_flag ("v4.1", Opt_v), + fsparam_flag ("v4.2", Opt_v), + fsparam_string("vers", Opt_vers), + fsparam_u32 ("wsize", Opt_wsize), + {} }; enum { - Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, - Opt_xprt_rdma6, - - Opt_xprt_err -}; - -static const match_table_t nfs_xprt_protocol_tokens = { - { Opt_xprt_udp, "udp" }, - { Opt_xprt_udp6, "udp6" }, - { Opt_xprt_tcp, "tcp" }, - { Opt_xprt_tcp6, "tcp6" }, - { Opt_xprt_rdma, "rdma" }, - { Opt_xprt_rdma6, "rdma6" }, - - { Opt_xprt_err, NULL } + Opt_local_lock_all, + Opt_local_lock_flock, + Opt_local_lock_none, + Opt_local_lock_posix, }; enum { - Opt_sec_none, Opt_sec_sys, - Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, - Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, - Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, - - Opt_sec_err + Opt_lookupcache_all, + Opt_lookupcache_none, + Opt_lookupcache_positive, }; -static const match_table_t nfs_secflavor_tokens = { - { Opt_sec_none, "none" }, - { Opt_sec_none, "null" }, - { Opt_sec_sys, "sys" }, - - { Opt_sec_krb5, "krb5" }, - { Opt_sec_krb5i, "krb5i" }, - { Opt_sec_krb5p, "krb5p" }, - - { Opt_sec_lkey, "lkey" }, - { Opt_sec_lkeyi, "lkeyi" }, - { Opt_sec_lkeyp, "lkeyp" }, - - { Opt_sec_spkm, "spkm3" }, - { Opt_sec_spkmi, "spkm3i" }, - { Opt_sec_spkmp, "spkm3p" }, +static const struct fs_parameter_enum nfs_param_enums[] = { + { Opt_local_lock, "all", Opt_local_lock_all }, + { Opt_local_lock, "flock", Opt_local_lock_flock }, + { Opt_local_lock, "none", Opt_local_lock_none }, + { Opt_local_lock, "posix", Opt_local_lock_posix }, + { Opt_lookupcache, "all", Opt_lookupcache_all }, + { Opt_lookupcache, "none", Opt_lookupcache_none }, + { Opt_lookupcache, "pos", Opt_lookupcache_positive }, + { Opt_lookupcache, "positive", Opt_lookupcache_positive }, + {} +}; - { Opt_sec_err, NULL } +static const struct fs_parameter_description nfs_fs_parameters = { + .name = "nfs", + .specs = nfs_param_specs, + .enums = nfs_param_enums, }; enum { - Opt_lookupcache_all, Opt_lookupcache_positive, - Opt_lookupcache_none, - - Opt_lookupcache_err + Opt_vers_2, + Opt_vers_3, + Opt_vers_4, + Opt_vers_4_0, + Opt_vers_4_1, + Opt_vers_4_2, }; -static const match_table_t nfs_lookupcache_tokens = { - { Opt_lookupcache_all, "all" }, - { Opt_lookupcache_positive, "pos" }, - { Opt_lookupcache_positive, "positive" }, - { Opt_lookupcache_none, "none" }, - - { Opt_lookupcache_err, NULL } +static const struct constant_table nfs_vers_tokens[] = { + { "2", Opt_vers_2 }, + { "3", Opt_vers_3 }, + { "4", Opt_vers_4 }, + { "4.0", Opt_vers_4_0 }, + { "4.1", Opt_vers_4_1 }, + { "4.2", Opt_vers_4_2 }, }; enum { - Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, - Opt_local_lock_none, - - Opt_local_lock_err + Opt_xprt_rdma, + Opt_xprt_rdma6, + Opt_xprt_tcp, + Opt_xprt_tcp6, + Opt_xprt_udp, + Opt_xprt_udp6, + nr__Opt_xprt }; -static const match_table_t nfs_local_lock_tokens = { - { Opt_local_lock_all, "all" }, - { Opt_local_lock_flock, "flock" }, - { Opt_local_lock_posix, "posix" }, - { Opt_local_lock_none, "none" }, - - { Opt_local_lock_err, NULL } +static const struct constant_table nfs_xprt_protocol_tokens[nr__Opt_xprt] = { + { "rdma", Opt_xprt_rdma }, + { "rdma6", Opt_xprt_rdma6 }, + { "tcp", Opt_xprt_tcp }, + { "tcp6", Opt_xprt_tcp6 }, + { "udp", Opt_xprt_udp }, + { "udp6", Opt_xprt_udp6 }, }; enum { - Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, - Opt_vers_4_1, Opt_vers_4_2, - - Opt_vers_err + Opt_sec_krb5, + Opt_sec_krb5i, + Opt_sec_krb5p, + Opt_sec_lkey, + Opt_sec_lkeyi, + Opt_sec_lkeyp, + Opt_sec_none, + Opt_sec_spkm, + Opt_sec_spkmi, + Opt_sec_spkmp, + Opt_sec_sys, + nr__Opt_sec }; -static const match_table_t nfs_vers_tokens = { - { Opt_vers_2, "2" }, - { Opt_vers_3, "3" }, - { Opt_vers_4, "4" }, - { Opt_vers_4_0, "4.0" }, - { Opt_vers_4_1, "4.1" }, - { Opt_vers_4_2, "4.2" }, - - { Opt_vers_err, NULL } +static const struct constant_table nfs_secflavor_tokens[] = { + { "krb5", Opt_sec_krb5 }, + { "krb5i", Opt_sec_krb5i }, + { "krb5p", Opt_sec_krb5p }, + { "lkey", Opt_sec_lkey }, + { "lkeyi", Opt_sec_lkeyi }, + { "lkeyp", Opt_sec_lkeyp }, + { "none", Opt_sec_none }, + { "null", Opt_sec_none }, + { "spkm3", Opt_sec_spkm }, + { "spkm3i", Opt_sec_spkmi }, + { "spkm3p", Opt_sec_spkmp }, + { "sys", Opt_sec_sys }, }; struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) @@ -368,17 +366,19 @@ static int nfs_auth_info_add(struct nfs_fs_context *ctx, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) +static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, + struct fs_parameter *param) { - substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; - char *p; + char *string = param->string, *p; int ret; - dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); + dfprintk(MOUNT, "NFS: parsing %s=%s option\n", param->key, param->string); - while ((p = strsep(&value, ":")) != NULL) { - switch (match_token(p, nfs_secflavor_tokens, args)) { + while ((p = strsep(&string, ":")) != NULL) { + if (!*p) + continue; + switch (lookup_constant(nfs_secflavor_tokens, p, -1)) { case Opt_sec_none: pseudoflavor = RPC_AUTH_NULL; break; @@ -427,11 +427,10 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) } static int nfs_parse_version_string(struct nfs_fs_context *ctx, - char *string, - substring_t *args) + const char *string) { ctx->flags &= ~NFS_MOUNT_VER3; - switch (match_token(string, nfs_vers_tokens, args)) { + switch (lookup_constant(nfs_vers_tokens, string, -1)) { case Opt_vers_2: ctx->version = 2; break; @@ -465,64 +464,24 @@ static int nfs_parse_version_string(struct nfs_fs_context *ctx, return 0; } -static int nfs_get_option_str(substring_t args[], char **option) -{ - kfree(*option); - *option = match_strdup(args); - return !*option; -} - -static int nfs_get_option_ui(struct nfs_fs_context *ctx, - substring_t args[], unsigned int *option) -{ - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - return kstrtouint(ctx->buf, 10, option); -} - -static int nfs_get_option_ui_bound(struct nfs_fs_context *ctx, - substring_t args[], unsigned int *option, - unsigned int l_bound, unsigned u_bound) -{ - int ret; - - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - ret = kstrtouint(ctx->buf, 10, option); - if (ret < 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - -static int nfs_get_option_us_bound(struct nfs_fs_context *ctx, - substring_t args[], unsigned short *option, - unsigned short l_bound, - unsigned short u_bound) -{ - int ret; - - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - ret = kstrtou16(ctx->buf, 10, option); - if (ret < 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - /* - * Parse a single mount option in "key[=val]" form. + * Parse a single mount parameter. */ -static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) +static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, + struct fs_parameter *param) { - substring_t args[MAX_OPT_ARGS]; - char *string; - int token, ret; + struct fs_parse_result result; + unsigned short protofamily, mountfamily; + unsigned int len; + int ret, opt; - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { + opt = fs_parse(NULL, &nfs_fs_parameters, param, &result); + if (opt < 0) + return ctx->sloppy ? 1 : opt; + + switch (opt) { /* * boolean options: foo/nofoo */ @@ -538,30 +497,31 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); break; case Opt_posix: - ctx->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - ctx->flags &= ~NFS_MOUNT_POSIX; + if (result.negated) + ctx->flags &= ~NFS_MOUNT_POSIX; + else + ctx->flags |= NFS_MOUNT_POSIX; break; case Opt_cto: - ctx->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - ctx->flags |= NFS_MOUNT_NOCTO; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOCTO; + else + ctx->flags &= ~NFS_MOUNT_NOCTO; break; case Opt_ac: - ctx->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - ctx->flags |= NFS_MOUNT_NOAC; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOAC; + else + ctx->flags &= ~NFS_MOUNT_NOAC; break; case Opt_lock: - ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + if (result.negated) { + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + } else { + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + } break; case Opt_udp: ctx->flags &= ~NFS_MOUNT_TCP; @@ -574,195 +534,177 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) case Opt_rdma: ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); + xprt_load_transport(param->key); break; case Opt_acl: - ctx->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - ctx->flags |= NFS_MOUNT_NOACL; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOACL; + else + ctx->flags &= ~NFS_MOUNT_NOACL; break; case Opt_rdirplus: - ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - ctx->flags |= NFS_MOUNT_NORDIRPLUS; + if (result.negated) + ctx->flags |= NFS_MOUNT_NORDIRPLUS; + else + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; break; case Opt_sharecache: - ctx->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - ctx->flags |= NFS_MOUNT_UNSHARED; + if (result.negated) + ctx->flags |= NFS_MOUNT_UNSHARED; + else + ctx->flags &= ~NFS_MOUNT_UNSHARED; break; case Opt_resvport: - ctx->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - ctx->flags |= NFS_MOUNT_NORESVPORT; + if (result.negated) + ctx->flags |= NFS_MOUNT_NORESVPORT; + else + ctx->flags &= ~NFS_MOUNT_NORESVPORT; break; case Opt_fscache: - ctx->options |= NFS_OPTION_FSCACHE; kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_nofscache: - ctx->options &= ~NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; + ctx->fscache_uniq = param->string; + param->string = NULL; + if (result.negated) + ctx->options &= ~NFS_OPTION_FSCACHE; + else + ctx->options |= NFS_OPTION_FSCACHE; break; case Opt_migration: - ctx->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - ctx->options &= ~NFS_OPTION_MIGRATION; + if (result.negated) + ctx->options &= ~NFS_OPTION_MIGRATION; + else + ctx->options |= NFS_OPTION_MIGRATION; break; /* * options that take numeric values */ case Opt_port: - if (nfs_get_option_ui_bound(ctx, args, &ctx->nfs_server.port, - 0, USHRT_MAX)) - goto out_invalid_value; + if (result.uint_32 > USHRT_MAX) + goto out_of_bounds; + ctx->nfs_server.port = result.uint_32; break; case Opt_rsize: - if (nfs_get_option_ui(ctx, args, &ctx->rsize)) - goto out_invalid_value; + ctx->rsize = result.uint_32; break; case Opt_wsize: - if (nfs_get_option_ui(ctx, args, &ctx->wsize)) - goto out_invalid_value; + ctx->wsize = result.uint_32; break; case Opt_bsize: - if (nfs_get_option_ui(ctx, args, &ctx->bsize)) - goto out_invalid_value; + ctx->bsize = result.uint_32; break; case Opt_timeo: - if (nfs_get_option_ui_bound(ctx, args, &ctx->timeo, 1, INT_MAX)) - goto out_invalid_value; + if (result.uint_32 < 1 || result.uint_32 > INT_MAX) + goto out_of_bounds; + ctx->timeo = result.uint_32; break; case Opt_retrans: - if (nfs_get_option_ui_bound(ctx, args, &ctx->retrans, 0, INT_MAX)) - goto out_invalid_value; + if (result.uint_32 > INT_MAX) + goto out_of_bounds; + ctx->retrans = result.uint_32; break; case Opt_acregmin: - if (nfs_get_option_ui(ctx, args, &ctx->acregmin)) - goto out_invalid_value; + ctx->acregmin = result.uint_32; break; case Opt_acregmax: - if (nfs_get_option_ui(ctx, args, &ctx->acregmax)) - goto out_invalid_value; + ctx->acregmax = result.uint_32; break; case Opt_acdirmin: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmin)) - goto out_invalid_value; + ctx->acdirmin = result.uint_32; break; case Opt_acdirmax: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) - goto out_invalid_value; + ctx->acdirmax = result.uint_32; break; case Opt_actimeo: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) - goto out_invalid_value; - ctx->acregmin = ctx->acregmax = - ctx->acdirmin = ctx->acdirmax; + ctx->acregmin = result.uint_32; + ctx->acregmax = result.uint_32; + ctx->acdirmin = result.uint_32; + ctx->acdirmax = result.uint_32; break; case Opt_namelen: - if (nfs_get_option_ui(ctx, args, &ctx->namlen)) - goto out_invalid_value; + ctx->namlen = result.uint_32; break; case Opt_mountport: - if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.port, - 0, USHRT_MAX)) - goto out_invalid_value; + if (result.uint_32 > USHRT_MAX) + goto out_of_bounds; + ctx->mount_server.port = result.uint_32; break; case Opt_mountvers: - if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.version, - NFS_MNT_VERSION, NFS_MNT3_VERSION)) - goto out_invalid_value; + if (result.uint_32 < NFS_MNT_VERSION || + result.uint_32 > NFS_MNT3_VERSION) + goto out_of_bounds; + ctx->mount_server.version = result.uint_32; break; case Opt_minorversion: - if (nfs_get_option_ui_bound(ctx, args, &ctx->minorversion, - 0, NFS4_MAX_MINOR_VERSION)) - goto out_invalid_value; + if (result.uint_32 > NFS4_MAX_MINOR_VERSION) + goto out_of_bounds; + ctx->minorversion = result.uint_32; break; /* * options that take text values */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ret = nfs_parse_version_string(ctx, string, args); - kfree(string); + case Opt_v: + ret = nfs_parse_version_string(ctx, param->key + 1); + if (ret < 0) + return ret; + break; + case Opt_vers: + ret = nfs_parse_version_string(ctx, param->string); if (ret < 0) return ret; break; case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ret = nfs_parse_security_flavors(ctx, string); - kfree(string); + ret = nfs_parse_security_flavors(ctx, param); if (ret < 0) return ret; break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_xprt_protocol_tokens, args); - ctx->protofamily = AF_INET; - switch (token) { + case Opt_proto: + protofamily = AF_INET; + switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { case Opt_xprt_udp6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->flags &= ~NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); + xprt_load_transport(param->string); break; default: - kfree(string); dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } - kfree(string); + + ctx->protofamily = protofamily; break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_xprt_protocol_tokens, args); - kfree(string); - ctx->mountfamily = AF_INET; - switch (token) { + case Opt_mountproto: + mountfamily = AF_INET; + switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { case Opt_xprt_udp6: - ctx->mountfamily = AF_INET6; + mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - ctx->mountfamily = AF_INET6; + mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; @@ -772,51 +714,42 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } + ctx->mountfamily = mountfamily; break; + case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->nfs_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - &ctx->nfs_server.address, - sizeof(ctx->nfs_server._address)); - kfree(string); - if (ctx->nfs_server.addrlen == 0) + len = rpc_pton(ctx->net, param->string, param->size, + &ctx->nfs_server.address, + sizeof(ctx->nfs_server._address)); + if (len == 0) goto out_invalid_address; + ctx->nfs_server.addrlen = len; break; case Opt_clientaddr: - if (nfs_get_option_str(args, &ctx->client_address)) - goto out_nomem; + kfree(ctx->client_address); + ctx->client_address = param->string; + param->string = NULL; break; case Opt_mounthost: - if (nfs_get_option_str(args, &ctx->mount_server.hostname)) - goto out_nomem; + kfree(ctx->mount_server.hostname); + ctx->mount_server.hostname = param->string; + param->string = NULL; break; case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->mount_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - &ctx->mount_server.address, - sizeof(ctx->mount_server._address)); - kfree(string); - if (ctx->mount_server.addrlen == 0) + len = rpc_pton(ctx->net, param->string, param->size, + &ctx->mount_server.address, + sizeof(ctx->mount_server._address)); + if (len == 0) goto out_invalid_address; + ctx->mount_server.addrlen = len; break; case Opt_nconnect: - if (nfs_get_option_us_bound(ctx, args, &ctx->nfs_server.nconnect, - 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; + if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_CONNECTIONS) + goto out_of_bounds; + ctx->nfs_server.nconnect = result.uint_32; break; case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { + switch (result.uint_32) { case Opt_lookupcache_all: ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; @@ -828,22 +761,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: - dfprintk(MOUNT, "NFS: invalid lookupcache argument\n"); - return -EINVAL; + goto out_invalid_value; } break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &ctx->fscache_uniq)) - goto out_nomem; - ctx->options |= NFS_OPTION_FSCACHE; - break; case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, args); - kfree(string); - switch (token) { + switch (result.uint_32) { case Opt_local_lock_all: ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); @@ -859,39 +781,58 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) NFS_MOUNT_LOCAL_FCNTL); break; default: - dfprintk(MOUNT, "NFS: invalid local_lock argument\n"); - return -EINVAL; - }; + goto out_invalid_value; + } break; /* * Special options */ case Opt_sloppy: - ctx->sloppy = 1; + ctx->sloppy = true; dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option '%s'\n", p); - break; - - default: - dfprintk(MOUNT, "NFS: unrecognized mount option '%s'\n", p); - return -EINVAL; } return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return -EINVAL; out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + printk(KERN_INFO "NFS: Bad mount option value specified\n"); return -EINVAL; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return -ENOMEM; +out_invalid_address: + printk(KERN_INFO "NFS: Bad IP address specified\n"); + return -EINVAL; +out_of_bounds: + printk(KERN_INFO "NFS: Value for '%s' out of range\n", param->key); + return -ERANGE; +} + +/* cribbed from generic_parse_monolithic and vfs_parse_fs_string */ +static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) +{ + int ret; + char *key = p, *value; + size_t v_size = 0; + struct fs_parameter param; + + memset(¶m, 0, sizeof(param)); + value = strchr(key, '='); + if (value && value != key) { + *value++ = 0; + v_size = strlen(value); + } + param.key = key; + param.type = fs_value_is_flag; + param.size = v_size; + if (v_size > 0) { + param.type = fs_value_is_string; + param.string = kmemdup_nul(value, v_size, GFP_KERNEL); + if (!param.string) + return -ENOMEM; + } + ret = nfs_fs_context_parse_param(ctx, ¶m); + kfree(param.string); + return ret; } /* From patchwork Fri Sep 13 12:17:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144567 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4A6E61395 for ; 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Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 25/26] NFS: Add fs_context support. Date: Fri, 13 Sep 2019 08:17:47 -0400 Message-Id: <20190913121748.25391-26-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Fri, 13 Sep 2019 12:17:51 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: David Howells Add filesystem context support to NFS, parsing the options in advance and attaching the information to struct nfs_fs_context. The highlights are: (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context. This structure represents NFS's superblock config. (*) Make use of the VFS's parsing support to split comma-separated lists (*) Pin the NFS protocol module in the nfs_fs_context. (*) Attach supplementary error information to fs_context. This has the downside that these strings must be static and can't be formatted. (*) Remove the auxiliary file_system_type structs since the information necessary can be conveyed in the nfs_fs_context struct instead. (*) Root mounts are made by duplicating the config for the requested mount so as to have the same parameters. Submounts pick up their parameters from the parent superblock. [AV -- retrans is u32, not string] [SM -- Renamed cfg to ctx in a few functions in an earlier patch] [SM -- Moved fs_context mount option parsing to an earlier patch] [SM -- Moved fs_context error logging to a later patch] [SM -- Fixed printks in nfs4_try_get_tree() and nfs4_get_referral_tree()] [SM -- Added is_remount_fc() helper] Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Scott Mayhew --- fs/nfs/client.c | 22 +- fs/nfs/fs_context.c | 579 ++++++++++++++++++++++++---------------- fs/nfs/fscache.c | 2 +- fs/nfs/getroot.c | 70 ++--- fs/nfs/internal.h | 100 +++---- fs/nfs/namespace.c | 134 ++++++---- fs/nfs/nfs3_fs.h | 2 +- fs/nfs/nfs3client.c | 5 +- fs/nfs/nfs3proc.c | 2 +- fs/nfs/nfs4_fs.h | 9 +- fs/nfs/nfs4client.c | 62 ++--- fs/nfs/nfs4namespace.c | 285 +++++++++++--------- fs/nfs/nfs4proc.c | 2 +- fs/nfs/nfs4super.c | 164 ++++++------ fs/nfs/proc.c | 2 +- fs/nfs/super.c | 312 ++++++---------------- include/linux/nfs_xdr.h | 8 +- 17 files changed, 898 insertions(+), 862 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 511d1d629786..a26e7d1d74bc 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -648,17 +648,17 @@ EXPORT_SYMBOL_GPL(nfs_init_client); * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_fs_context *ctx, - struct nfs_subversion *nfs_mod) + const struct fs_context *fc) { + const struct nfs_fs_context *ctx = nfs_fc2context(fc); struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { .hostname = ctx->nfs_server.hostname, .addr = (const struct sockaddr *)&ctx->nfs_server.address, .addrlen = ctx->nfs_server.addrlen, - .nfs_mod = nfs_mod, + .nfs_mod = ctx->nfs_mod, .proto = ctx->nfs_server.protocol, - .net = ctx->net, + .net = fc->net_ns, .timeparms = &timeparms, .cred = server->cred, .nconnect = ctx->nfs_server.nconnect, @@ -940,10 +940,10 @@ EXPORT_SYMBOL_GPL(nfs_free_server); * Create a version 2 or 3 volume record * - keyed on server and FSID */ -struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) +struct nfs_server *nfs_create_server(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_server *server; - struct nfs_subversion *nfs_mod = mount_info->nfs_mod; struct nfs_fattr *fattr; int error; @@ -959,18 +959,18 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) goto error; /* Get a client representation */ - error = nfs_init_server(server, mount_info->ctx, nfs_mod); + error = nfs_init_server(server, fc); if (error < 0) goto error; /* Probe the root fh to retrieve its FSID */ - error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); + error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); if (error < 0) goto error; if (server->nfs_client->rpc_ops->version == 3) { if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) server->namelen = NFS3_MAXNAMLEN; - if (!(mount_info->ctx->flags & NFS_MOUNT_NORDIRPLUS)) + if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) server->caps |= NFS_CAP_READDIRPLUS; } else { if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) @@ -978,8 +978,8 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) } if (!(fattr->valid & NFS_ATTR_FATTR)) { - error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, - fattr, NULL, NULL); + error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, + fattr, NULL, NULL); if (error < 0) { dprintk("nfs_create_server: getattr error = %d\n", -error); goto error; diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 9a3162055d5d..0bf346cdea18 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -3,6 +3,7 @@ * linux/fs/nfs/fs_context.c * * Copyright (C) 1992 Rick Sladkey + * Conversion to new mount api Copyright (C) David Howells * * NFS mount handling. * @@ -240,43 +241,6 @@ static const struct constant_table nfs_secflavor_tokens[] = { { "sys", Opt_sec_sys }, }; -struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) -{ - struct nfs_fs_context *ctx; - - ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); - if (ctx) { - ctx->timeo = NFS_UNSPEC_TIMEO; - ctx->retrans = NFS_UNSPEC_RETRANS; - ctx->acregmin = NFS_DEF_ACREGMIN; - ctx->acregmax = NFS_DEF_ACREGMAX; - ctx->acdirmin = NFS_DEF_ACDIRMIN; - ctx->acdirmax = NFS_DEF_ACDIRMAX; - ctx->mount_server.port = NFS_UNSPEC_PORT; - ctx->nfs_server.port = NFS_UNSPEC_PORT; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; - ctx->minorversion = 0; - ctx->need_mount = true; - ctx->net = current->nsproxy->net_ns; - ctx->lsm_opts = NULL; - } - return ctx; -} - -void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx) -{ - if (ctx) { - kfree(ctx->client_address); - kfree(ctx->mount_server.hostname); - kfree(ctx->nfs_server.export_path); - kfree(ctx->nfs_server.hostname); - kfree(ctx->fscache_uniq); - security_free_mnt_opts(&ctx->lsm_opts); - kfree(ctx); - } -} - /* * Sanity-check a server address provided by the mount command. * @@ -341,7 +305,7 @@ static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) * Add 'flavor' to 'auth_info' if not already present. * Returns true if 'flavor' ends up in the list, false otherwise */ -static int nfs_auth_info_add(struct nfs_fs_context *ctx, +static int nfs_auth_info_add(struct fs_context *fc, struct nfs_auth_info *auth_info, rpc_authflavor_t flavor) { @@ -366,9 +330,10 @@ static int nfs_auth_info_add(struct nfs_fs_context *ctx, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, +static int nfs_parse_security_flavors(struct fs_context *fc, struct fs_parameter *param) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); rpc_authflavor_t pseudoflavor; char *string = param->string, *p; int ret; @@ -418,7 +383,7 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, return -EINVAL; } - ret = nfs_auth_info_add(ctx, &ctx->auth_info, pseudoflavor); + ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); if (ret < 0) return ret; } @@ -426,9 +391,11 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, return 0; } -static int nfs_parse_version_string(struct nfs_fs_context *ctx, +static int nfs_parse_version_string(struct fs_context *fc, const char *string) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); + ctx->flags &= ~NFS_MOUNT_VER3; switch (lookup_constant(nfs_vers_tokens, string, -1)) { case Opt_vers_2: @@ -467,21 +434,31 @@ static int nfs_parse_version_string(struct nfs_fs_context *ctx, /* * Parse a single mount parameter. */ -static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, +static int nfs_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param) { struct fs_parse_result result; + struct nfs_fs_context *ctx = nfs_fc2context(fc); unsigned short protofamily, mountfamily; unsigned int len; int ret, opt; dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); - opt = fs_parse(NULL, &nfs_fs_parameters, param, &result); + opt = fs_parse(fc, &nfs_fs_parameters, param, &result); if (opt < 0) return ctx->sloppy ? 1 : opt; switch (opt) { + case Opt_source: + if (fc->source) { + dfprintk(MOUNT, "NFS: Multiple sources not supported\n"); + return -EINVAL; + } + fc->source = param->string; + param->string = NULL; + break; + /* * boolean options: foo/nofoo */ @@ -645,17 +622,17 @@ static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, * options that take text values */ case Opt_v: - ret = nfs_parse_version_string(ctx, param->key + 1); + ret = nfs_parse_version_string(fc, param->key + 1); if (ret < 0) return ret; break; case Opt_vers: - ret = nfs_parse_version_string(ctx, param->string); + ret = nfs_parse_version_string(fc, param->string); if (ret < 0) return ret; break; case Opt_sec: - ret = nfs_parse_security_flavors(ctx, param); + ret = nfs_parse_security_flavors(fc, param); if (ret < 0) return ret; break; @@ -718,7 +695,7 @@ static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, break; case Opt_addr: - len = rpc_pton(ctx->net, param->string, param->size, + len = rpc_pton(fc->net_ns, param->string, param->size, &ctx->nfs_server.address, sizeof(ctx->nfs_server._address)); if (len == 0) @@ -736,7 +713,7 @@ static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, param->string = NULL; break; case Opt_mountaddr: - len = rpc_pton(ctx->net, param->string, param->size, + len = rpc_pton(fc->net_ns, param->string, param->size, &ctx->mount_server.address, sizeof(ctx->mount_server._address)); if (len == 0) @@ -807,114 +784,8 @@ static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, return -ERANGE; } -/* cribbed from generic_parse_monolithic and vfs_parse_fs_string */ -static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) -{ - int ret; - char *key = p, *value; - size_t v_size = 0; - struct fs_parameter param; - - memset(¶m, 0, sizeof(param)); - value = strchr(key, '='); - if (value && value != key) { - *value++ = 0; - v_size = strlen(value); - } - param.key = key; - param.type = fs_value_is_flag; - param.size = v_size; - if (v_size > 0) { - param.type = fs_value_is_string; - param.string = kmemdup_nul(value, v_size, GFP_KERNEL); - if (!param.string) - return -ENOMEM; - } - ret = nfs_fs_context_parse_param(ctx, ¶m); - kfree(param.string); - return ret; -} - /* - * Error-check and convert a string of mount options from user space into - * a data structure. The whole mount string is processed; bad options are - * skipped as they are encountered. If there were no errors, return 1; - * otherwise return 0 (zero). - */ -int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) -{ - char *p; - int rc, sloppy = 0, invalid_option = 0; - - if (!raw) { - dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); - return 1; - } - dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - - rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); - if (rc) - goto out_security_failure; - - while ((p = strsep(&raw, ",")) != NULL) { - if (!*p) - continue; - if (nfs_fs_context_parse_option(ctx, p) < 0) - invalid_option = true; - } - - if (!sloppy && invalid_option) - return 0; - - if (ctx->minorversion && ctx->version != 4) - goto out_minorversion_mismatch; - - if (ctx->options & NFS_OPTION_MIGRATION && - (ctx->version != 4 || ctx->minorversion != 0)) - goto out_migration_misuse; - - /* - * verify that any proto=/mountproto= options match the address - * families in the addr=/mountaddr= options. - */ - if (ctx->protofamily != AF_UNSPEC && - ctx->protofamily != ctx->nfs_server.address.sa_family) - goto out_proto_mismatch; - - if (ctx->mountfamily != AF_UNSPEC) { - if (ctx->mount_server.addrlen) { - if (ctx->mountfamily != ctx->mount_server.address.sa_family) - goto out_mountproto_mismatch; - } else { - if (ctx->mountfamily != ctx->nfs_server.address.sa_family) - goto out_mountproto_mismatch; - } - } - - return 1; - -out_minorversion_mismatch: - printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", ctx->version, ctx->minorversion); - return 0; -out_mountproto_mismatch: - printk(KERN_INFO "NFS: mount server address does not match mountproto= " - "option\n"); - return 0; -out_proto_mismatch: - printk(KERN_INFO "NFS: server address does not match proto= option\n"); - return 0; -out_migration_misuse: - printk(KERN_INFO - "NFS: 'migration' not supported for this NFS version\n"); - return -EINVAL; -out_security_failure: - printk(KERN_INFO "NFS: security options invalid: %d\n", rc); - return 0; -} - -/* - * Split "dev_name" into "hostname:export_path". + * Split fc->source into "hostname:export_path". * * The leftmost colon demarks the split between the server's hostname * and the export path. If the hostname starts with a left square @@ -922,12 +793,13 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * * Note: caller frees hostname and export path, even on error. */ -static int nfs_parse_devname(struct nfs_fs_context *ctx, - const char *dev_name, - size_t maxnamlen, size_t maxpathlen) +static int nfs_parse_source(struct fs_context *fc, + size_t maxnamlen, size_t maxpathlen) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); + const char *dev_name = fc->source; size_t len; - char *end; + const char *end; if (unlikely(!dev_name || !*dev_name)) { dfprintk(MOUNT, "NFS: device name not specified\n"); @@ -943,7 +815,7 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, len = end - dev_name; end++; } else { - char *comma; + const char *comma; end = strchr(dev_name, ':'); if (end == NULL) @@ -951,8 +823,8 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, len = end - dev_name; /* kill possible hostname list: not supported */ - comma = strchr(dev_name, ','); - if (comma != NULL && comma < end) + comma = memchr(dev_name, ',', len); + if (comma) len = comma - dev_name; } @@ -990,6 +862,11 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, return -ENAMETOOLONG; } +static inline bool is_remount_fc(struct fs_context *fc) +{ + return fc->root != NULL; +} + /* * Parse monolithic NFS2/NFS3 mount data * - fills in the mount root filehandle @@ -1006,12 +883,11 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, * + breaking back: trying proto=udp after proto=tcp, v2 after v3, * mountproto=tcp after mountproto=udp, and so on */ -static int nfs23_validate_mount_data(void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name) +static int nfs23_parse_monolithic(struct fs_context *fc, + struct nfs_mount_data *data) { - struct nfs_mount_data *data = (struct nfs_mount_data *)options; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct nfs_fh *mntfh = ctx->mntfh; struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; @@ -1083,6 +959,9 @@ static int nfs23_validate_mount_data(void *options, ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; /* N.B. caller will free nfs_server.hostname in all cases */ ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); + if (!ctx->nfs_server.hostname) + goto out_nomem; + ctx->namlen = data->namlen; ctx->bsize = data->bsize; @@ -1090,8 +969,6 @@ static int nfs23_validate_mount_data(void *options, ctx->selected_flavor = data->pseudoflavor; else ctx->selected_flavor = RPC_AUTH_UNIX; - if (!ctx->nfs_server.hostname) - goto out_nomem; if (!(data->flags & NFS_MOUNT_NONLM)) ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| @@ -1099,6 +976,7 @@ static int nfs23_validate_mount_data(void *options, else ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); + /* * The legacy version 6 binary mount data from userspace has a * field used only to transport selinux information into the @@ -1109,12 +987,13 @@ static int nfs23_validate_mount_data(void *options, */ if (data->context[0]){ #ifdef CONFIG_SECURITY_SELINUX - int rc; + int ret; + data->context[NFS_MAX_CONTEXT_LEN] = '\0'; - rc = security_add_mnt_opt("context", data->context, - strlen(data->context), ctx->lsm_opts); - if (rc) - return rc; + ret = vfs_parse_fs_string(fc, "context", + data->context, strlen(data->context)); + if (ret < 0) + return ret; #else return -EINVAL; #endif @@ -1122,12 +1001,20 @@ static int nfs23_validate_mount_data(void *options, break; default: - return NFS_TEXT_DATA; + goto generic; } + ctx->skip_reconfig_option_check = true; return 0; +generic: + return generic_parse_monolithic(fc, data); + out_no_data: + if (is_remount_fc(fc)) { + ctx->skip_reconfig_option_check = true; + return 0; + } dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); return -EINVAL; @@ -1154,21 +1041,14 @@ static int nfs23_validate_mount_data(void *options, } #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx) -{ - ctx->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| - NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); -} - /* * Validate NFSv4 mount options */ -static int nfs4_validate_mount_data(void *options, - struct nfs_fs_context *ctx, - const char *dev_name) +static int nfs4_parse_monolithic(struct fs_context *fc, + struct nfs4_mount_data *data) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; - struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; char *c; if (data == NULL) @@ -1218,7 +1098,7 @@ static int nfs4_validate_mount_data(void *options, ctx->client_address = c; /* - * Translate to nfs_fs_context, which nfs4_fill_super + * Translate to nfs_fs_context, which nfs_fill_super * can deal with. */ @@ -1238,12 +1118,20 @@ static int nfs4_validate_mount_data(void *options, break; default: - return NFS_TEXT_DATA; + goto generic; } + ctx->skip_reconfig_option_check = true; return 0; +generic: + return generic_parse_monolithic(fc, data); + out_no_data: + if (is_remount_fc(fc)) { + ctx->skip_reconfig_option_check = true; + return 0; + } dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); return -EINVAL; @@ -1260,58 +1148,87 @@ static int nfs4_validate_mount_data(void *options, dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); return -EINVAL; } +#endif -int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name) -{ - if (fs_type == &nfs_fs_type) - return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); - return nfs4_validate_mount_data(options, ctx, dev_name); -} -#else -int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name) +/* + * Parse a monolithic block of data from sys_mount(). + */ +static int nfs_fs_context_parse_monolithic(struct fs_context *fc, + void *data) { - return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); -} + if (fc->fs_type == &nfs_fs_type) + return nfs23_parse_monolithic(fc, data); + +#if IS_ENABLED(CONFIG_NFS_V4) + if (fc->fs_type == &nfs4_fs_type) + return nfs4_parse_monolithic(fc, data); #endif -int nfs_validate_text_mount_data(void *options, - struct nfs_fs_context *ctx, - const char *dev_name) + dfprintk(MOUNT, "NFS: Unsupported monolithic data version\n"); + return -EINVAL; +} + +/* + * Validate the preparsed information in the config. + */ +static int nfs_fs_context_validate(struct fs_context *fc) { - int port = 0; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct nfs_subversion *nfs_mod; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int max_namelen = PAGE_SIZE; int max_pathlen = NFS_MAXPATHLEN; - struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; + int port = 0; + int ret; - if (nfs_parse_mount_options((char *)options, ctx) == 0) - return -EINVAL; + if (!fc->source) + goto out_no_device_name; + + /* Check for sanity first. */ + if (ctx->minorversion && ctx->version != 4) + goto out_minorversion_mismatch; + + if (ctx->options & NFS_OPTION_MIGRATION && + (ctx->version != 4 || ctx->minorversion != 0)) + goto out_migration_misuse; + + /* Verify that any proto=/mountproto= options match the address + * families in the addr=/mountaddr= options. + */ + if (ctx->protofamily != AF_UNSPEC && + ctx->protofamily != ctx->nfs_server.address.sa_family) + goto out_proto_mismatch; + + if (ctx->mountfamily != AF_UNSPEC) { + if (ctx->mount_server.addrlen) { + if (ctx->mountfamily != ctx->mount_server.address.sa_family) + goto out_mountproto_mismatch; + } else { + if (ctx->mountfamily != ctx->nfs_server.address.sa_family) + goto out_mountproto_mismatch; + } + } if (!nfs_verify_server_address(sap)) goto out_no_address; if (ctx->version == 4) { -#if IS_ENABLED(CONFIG_NFS_V4) - if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - else - port = NFS_PORT; - max_namelen = NFS4_MAXNAMLEN; - max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(ctx); - if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - nfs4_validate_mount_flags(ctx); -#else - goto out_v4_not_compiled; -#endif /* CONFIG_NFS_V4 */ + if (IS_ENABLED(CONFIG_NFS_V4)) { + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + else + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL | + NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + } else { + goto out_v4_not_compiled; + } } else { nfs_set_mount_transport_protocol(ctx); if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) @@ -1320,19 +1237,219 @@ int nfs_validate_text_mount_data(void *options, nfs_set_port(sap, &ctx->nfs_server.port, port); - return nfs_parse_devname(ctx, dev_name, max_namelen, max_pathlen); + ret = nfs_parse_source(fc, max_namelen, max_pathlen); + if (ret < 0) + return ret; + + /* Load the NFS protocol module if we haven't done so yet */ + if (!ctx->nfs_mod) { + nfs_mod = get_nfs_version(ctx->version); + if (IS_ERR(nfs_mod)) { + ret = PTR_ERR(nfs_mod); + goto out_version_unavailable; + } + ctx->nfs_mod = nfs_mod; + } + return 0; -#if !IS_ENABLED(CONFIG_NFS_V4) +out_no_device_name: + dfprintk(MOUNT, "NFS: Device name not specified\n"); + return -EINVAL; out_v4_not_compiled: dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); return -EPROTONOSUPPORT; -#else out_invalid_transport_udp: dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); return -EINVAL; -#endif /* !CONFIG_NFS_V4 */ - out_no_address: dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); return -EINVAL; +out_mountproto_mismatch: + dfprintk(MOUNT, "NFS: Mount server address does not match mountproto= option\n"); + return -EINVAL; +out_proto_mismatch: + dfprintk(MOUNT, "NFS: Server address does not match proto= option\n"); + return -EINVAL; +out_minorversion_mismatch: + dfprintk(MOUNT, "NFS: Mount option vers=%u does not support minorversion=%u\n", + ctx->version, ctx->minorversion); + return -EINVAL; +out_migration_misuse: + dfprintk(MOUNT, "NFS: 'Migration' not supported for this NFS version\n"); + return -EINVAL; +out_version_unavailable: + dfprintk(MOUNT, "NFS: Version unavailable\n"); + return ret; +} + +/* + * Create an NFS superblock by the appropriate method. + */ +static int nfs_get_tree(struct fs_context *fc) +{ + struct nfs_fs_context *ctx = nfs_fc2context(fc); + int err = nfs_fs_context_validate(fc); + + if (err) + return err; + if (!ctx->internal) + return ctx->nfs_mod->rpc_ops->try_get_tree(fc); + else + return nfs_get_tree_common(fc); +} + +/* + * Handle duplication of a configuration. The caller copied *src into *sc, but + * it can't deal with resource pointers in the filesystem context, so we have + * to do that. We need to clear pointers, copy data or get extra refs as + * appropriate. + */ +static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) +{ + struct nfs_fs_context *src = nfs_fc2context(src_fc), *ctx; + + ctx = kmemdup(src, sizeof(struct nfs_fs_context), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->mntfh = nfs_alloc_fhandle(); + if (!ctx->mntfh) { + kfree(ctx); + return -ENOMEM; + } + nfs_copy_fh(ctx->mntfh, src->mntfh); + + __module_get(ctx->nfs_mod->owner); + ctx->client_address = NULL; + ctx->mount_server.hostname = NULL; + ctx->nfs_server.export_path = NULL; + ctx->nfs_server.hostname = NULL; + ctx->fscache_uniq = NULL; + fc->fs_private = ctx; + return 0; +} + +static void nfs_fs_context_free(struct fs_context *fc) +{ + struct nfs_fs_context *ctx = nfs_fc2context(fc); + + if (ctx) { + if (ctx->server) + nfs_free_server(ctx->server); + if (ctx->nfs_mod) + put_nfs_version(ctx->nfs_mod); + kfree(ctx->client_address); + kfree(ctx->mount_server.hostname); + kfree(ctx->nfs_server.export_path); + kfree(ctx->nfs_server.hostname); + kfree(ctx->fscache_uniq); + nfs_free_fhandle(ctx->mntfh); + kfree(ctx); + } +} + +static const struct fs_context_operations nfs_fs_context_ops = { + .free = nfs_fs_context_free, + .dup = nfs_fs_context_dup, + .parse_param = nfs_fs_context_parse_param, + .parse_monolithic = nfs_fs_context_parse_monolithic, + .get_tree = nfs_get_tree, + .reconfigure = nfs_reconfigure, +}; + +/* + * Prepare superblock configuration. We use the namespaces attached to the + * context. This may be the current process's namespaces, or it may be a + * container's namespaces. + */ +static int nfs_init_fs_context(struct fs_context *fc) +{ + struct nfs_fs_context *ctx; + + ctx = kzalloc(sizeof(struct nfs_fs_context), GFP_KERNEL); + if (unlikely(!ctx)) + return -ENOMEM; + + ctx->mntfh = nfs_alloc_fhandle(); + if (unlikely(!ctx->mntfh)) { + kfree(ctx); + return -ENOMEM; + } + + ctx->protofamily = AF_UNSPEC; + ctx->mountfamily = AF_UNSPEC; + ctx->mount_server.port = NFS_UNSPEC_PORT; + + if (fc->root) { + /* reconfigure, start with the current config */ + struct nfs_server *nfss = fc->root->d_sb->s_fs_info; + struct net *net = nfss->nfs_client->cl_net; + + ctx->flags = nfss->flags; + ctx->rsize = nfss->rsize; + ctx->wsize = nfss->wsize; + ctx->retrans = nfss->client->cl_timeout->to_retries; + ctx->selected_flavor = nfss->client->cl_auth->au_flavor; + ctx->acregmin = nfss->acregmin / HZ; + ctx->acregmax = nfss->acregmax / HZ; + ctx->acdirmin = nfss->acdirmin / HZ; + ctx->acdirmax = nfss->acdirmax / HZ; + ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; + ctx->nfs_server.port = nfss->port; + ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; + ctx->version = nfss->nfs_client->rpc_ops->version; + ctx->minorversion = nfss->nfs_client->cl_minorversion; + + memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, + ctx->nfs_server.addrlen); + + if (fc->net_ns != net) { + put_net(fc->net_ns); + fc->net_ns = get_net(net); + } + + ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod; + __module_get(ctx->nfs_mod->owner); + } else { + /* defaults */ + ctx->timeo = NFS_UNSPEC_TIMEO; + ctx->retrans = NFS_UNSPEC_RETRANS; + ctx->acregmin = NFS_DEF_ACREGMIN; + ctx->acregmax = NFS_DEF_ACREGMAX; + ctx->acdirmin = NFS_DEF_ACDIRMIN; + ctx->acdirmax = NFS_DEF_ACDIRMAX; + ctx->nfs_server.port = NFS_UNSPEC_PORT; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; + ctx->minorversion = 0; + ctx->need_mount = true; + } + fc->fs_private = ctx; + fc->ops = &nfs_fs_context_ops; + return 0; } + +struct file_system_type nfs_fs_type = { + .owner = THIS_MODULE, + .name = "nfs", + .init_fs_context = nfs_init_fs_context, + .parameters = &nfs_fs_parameters, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; +MODULE_ALIAS_FS("nfs"); +EXPORT_SYMBOL_GPL(nfs_fs_type); + +#if IS_ENABLED(CONFIG_NFS_V4) +struct file_system_type nfs4_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .init_fs_context = nfs_init_fs_context, + .parameters = &nfs_fs_parameters, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; +MODULE_ALIAS_FS("nfs4"); +MODULE_ALIAS("nfs4"); +EXPORT_SYMBOL_GPL(nfs4_fs_type); +#endif /* CONFIG_NFS_V4 */ diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index 3800ab6f08fa..4a8df8c30a03 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -128,7 +128,7 @@ void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, int return; key->nfs_client = nfss->nfs_client; - key->key.super.s_flags = sb->s_flags & NFS_MS_MASK; + key->key.super.s_flags = sb->s_flags & NFS_SB_MASK; key->key.nfs_server.flags = nfss->flags; key->key.nfs_server.rsize = nfss->rsize; key->key.nfs_server.wsize = nfss->wsize; diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index 878c4c5982d9..ab45496d23a6 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -64,66 +64,68 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i /* * get an NFS2/NFS3 root dentry from the root filehandle */ -struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh, - const char *devname) +int nfs_get_root(struct super_block *s, struct fs_context *fc) { - struct nfs_server *server = NFS_SB(sb); + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct nfs_server *server = NFS_SB(s); struct nfs_fsinfo fsinfo; - struct dentry *ret; + struct dentry *root; struct inode *inode; - void *name = kstrdup(devname, GFP_KERNEL); - int error; + char *name; + int error = -ENOMEM; + name = kstrdup(fc->source, GFP_KERNEL); if (!name) - return ERR_PTR(-ENOMEM); + goto out; /* get the actual root for this mount */ fsinfo.fattr = nfs_alloc_fattr(); - if (fsinfo.fattr == NULL) { - kfree(name); - return ERR_PTR(-ENOMEM); - } + if (fsinfo.fattr == NULL) + goto out_name; - error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo); + error = server->nfs_client->rpc_ops->getroot(server, ctx->mntfh, &fsinfo); if (error < 0) { dprintk("nfs_get_root: getattr error = %d\n", -error); - ret = ERR_PTR(error); - goto out; + goto out_fattr; } - inode = nfs_fhget(sb, mntfh, fsinfo.fattr, NULL); + inode = nfs_fhget(s, ctx->mntfh, fsinfo.fattr, NULL); if (IS_ERR(inode)) { dprintk("nfs_get_root: get root inode failed\n"); - ret = ERR_CAST(inode); - goto out; + error = PTR_ERR(inode); + goto out_fattr; } - error = nfs_superblock_set_dummy_root(sb, inode); - if (error != 0) { - ret = ERR_PTR(error); - goto out; - } + error = nfs_superblock_set_dummy_root(s, inode); + if (error != 0) + goto out_fattr; /* root dentries normally start off anonymous and get spliced in later * if the dentry tree reaches them; however if the dentry already * exists, we'll pick it up at this point and use it as the root */ - ret = d_obtain_root(inode); - if (IS_ERR(ret)) { + root = d_obtain_root(inode); + if (IS_ERR(root)) { dprintk("nfs_get_root: get root dentry failed\n"); - goto out; + error = PTR_ERR(root); + goto out_fattr; } - security_d_instantiate(ret, inode); - spin_lock(&ret->d_lock); - if (IS_ROOT(ret) && !ret->d_fsdata && - !(ret->d_flags & DCACHE_NFSFS_RENAMED)) { - ret->d_fsdata = name; + security_d_instantiate(root, inode); + spin_lock(&root->d_lock); + if (IS_ROOT(root) && !root->d_fsdata && + !(root->d_flags & DCACHE_NFSFS_RENAMED)) { + root->d_fsdata = name; name = NULL; } - spin_unlock(&ret->d_lock); -out: - kfree(name); + spin_unlock(&root->d_lock); + fc->root = root; + error = 0; + +out_fattr: nfs_free_fattr(fsinfo.fattr); - return ret; +out_name: + kfree(name); +out: + return error; } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index caaf0af1bc7f..e0911815e153 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -4,18 +4,19 @@ */ #include "nfs4_fs.h" -#include +#include #include #include #include #include #include -#define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) +#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) extern const struct export_operations nfs_export_ops; struct nfs_string; +struct nfs_pageio_descriptor; /* Maximum number of readahead requests * FIXME: this should really be a sysctl so that users may tune it to suit @@ -40,16 +41,6 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) return 1; } -struct nfs_clone_mount { - const struct super_block *sb; - const struct dentry *dentry; - char *hostname; - char *mnt_path; - struct sockaddr *addr; - size_t addrlen; - rpc_authflavor_t authflavor; -}; - /* * Note: RFC 1813 doesn't limit the number of auth flavors that * a server can return, so make something up. @@ -90,6 +81,10 @@ struct nfs_client_initdata { * In-kernel mount arguments */ struct nfs_fs_context { + bool internal; + bool skip_reconfig_option_check; + bool need_mount; + bool sloppy; unsigned int flags; /* NFS{,4}_MOUNT_* flags */ unsigned int rsize, wsize; unsigned int timeo, retrans; @@ -106,8 +101,6 @@ struct nfs_fs_context { char *fscache_uniq; unsigned short protofamily; unsigned short mountfamily; - bool need_mount; - bool sloppy; struct { union { @@ -132,14 +125,27 @@ struct nfs_fs_context { int port; unsigned short protocol; unsigned short nconnect; + unsigned short export_path_len; } nfs_server; - void *lsm_opts; - struct net *net; - - char buf[32]; /* Parse buffer */ + struct nfs_fh *mntfh; + struct nfs_server *server; + struct nfs_subversion *nfs_mod; + + /* Information for a cloned mount. */ + struct nfs_clone_mount { + struct super_block *sb; + struct dentry *dentry; + struct nfs_fattr *fattr; + unsigned int inherited_bsize; + } clone_data; }; +static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) +{ + return fc->fs_private; +} + /* mount_clnt.c */ struct nfs_mount_request { struct sockaddr *sap; @@ -155,15 +161,6 @@ struct nfs_mount_request { struct net *net; }; -struct nfs_mount_info { - unsigned int inherited_bsize; - struct nfs_fs_context *ctx; - struct nfs_clone_mount *cloned; - struct nfs_server *server; - struct nfs_fh *mntfh; - struct nfs_subversion *nfs_mod; -}; - extern int nfs_mount(struct nfs_mount_request *info); extern void nfs_umount(const struct nfs_mount_request *info); @@ -189,10 +186,9 @@ extern struct nfs_client *nfs4_find_client_ident(struct net *, int); extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); -extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); -extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); -extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, - struct nfs_fh *); +extern struct nfs_server *nfs_create_server(struct fs_context *); +extern struct nfs_server *nfs4_create_server(struct fs_context *); +extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); extern int nfs4_update_server(struct nfs_server *server, const char *hostname, struct sockaddr *sap, size_t salen, struct net *net); @@ -243,22 +239,8 @@ static inline void nfs_fs_proc_exit(void) extern const struct svc_version nfs4_callback_version1; extern const struct svc_version nfs4_callback_version4; -struct nfs_pageio_descriptor; - -/* mount.c */ -#define NFS_TEXT_DATA 1 - -extern struct nfs_fs_context *nfs_alloc_parsed_mount_data(void); -extern void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx); -extern int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx); -extern int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name); -extern int nfs_validate_text_mount_data(void *options, - struct nfs_fs_context *ctx, - const char *dev_name); +/* fs_context.c */ +extern struct file_system_type nfs_fs_type; /* pagelist.c */ extern int __init nfs_init_nfspagecache(void); @@ -419,14 +401,9 @@ extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); /* super.c */ extern const struct super_operations nfs_sops; -extern struct file_system_type nfs_fs_type; -extern struct file_system_type nfs_prepared_fs_type; -#if IS_ENABLED(CONFIG_NFS_V4) -extern struct file_system_type nfs4_referral_fs_type; -#endif bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); -struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); +int nfs_try_get_tree(struct fs_context *); +int nfs_get_tree_common(struct fs_context *); void nfs_kill_super(struct super_block *); extern struct rpc_stat nfs_rpcstat; @@ -454,18 +431,13 @@ static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) extern char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen, unsigned flags); extern struct vfsmount *nfs_d_automount(struct path *path); -struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); -struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, - struct nfs_fattr *, rpc_authflavor_t); +int nfs_submount(struct fs_context *, struct nfs_server *); +int nfs_do_submount(struct fs_context *); /* getroot.c */ -extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, - const char *); +extern int nfs_get_root(struct super_block *s, struct fs_context *fc); #if IS_ENABLED(CONFIG_NFS_V4) -extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, - const char *); - +extern int nfs4_get_root(struct super_block *s, struct fs_context *cfg); extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); #endif @@ -484,7 +456,7 @@ int nfs_show_options(struct seq_file *, struct dentry *); int nfs_show_devname(struct seq_file *, struct dentry *); int nfs_show_path(struct seq_file *, struct dentry *); int nfs_show_stats(struct seq_file *, struct dentry *); -int nfs_remount(struct super_block *sb, int *flags, char *raw_data); +int nfs_reconfigure(struct fs_context *); /* write.c */ extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 72a99f9c7390..3e566a632215 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -140,31 +140,62 @@ EXPORT_SYMBOL_GPL(nfs_path); */ struct vfsmount *nfs_d_automount(struct path *path) { - struct vfsmount *mnt; + struct nfs_fs_context *ctx; + struct fs_context *fc; + struct vfsmount *mnt = ERR_PTR(-ENOMEM); struct nfs_server *server = NFS_SERVER(d_inode(path->dentry)); - struct nfs_fh *fh = NULL; - struct nfs_fattr *fattr = NULL; + struct nfs_client *client = server->nfs_client; + int ret; if (IS_ROOT(path->dentry)) return ERR_PTR(-ESTALE); - mnt = ERR_PTR(-ENOMEM); - fh = nfs_alloc_fhandle(); - fattr = nfs_alloc_fattr(); - if (fh == NULL || fattr == NULL) - goto out; + /* Open a new filesystem context, transferring parameters from the + * parent superblock, including the network namespace. + */ + fc = fs_context_for_submount(&nfs_fs_type, path->dentry); + if (IS_ERR(fc)) + return ERR_CAST(fc); - mnt = server->nfs_client->rpc_ops->submount(server, path->dentry, fh, fattr); + ctx = nfs_fc2context(fc); + ctx->clone_data.dentry = path->dentry; + ctx->clone_data.sb = path->dentry->d_sb; + ctx->clone_data.fattr = nfs_alloc_fattr(); + if (!ctx->clone_data.fattr) + goto out_fc; + + if (fc->net_ns != client->cl_net) { + put_net(fc->net_ns); + fc->net_ns = get_net(client->cl_net); + } + + /* for submounts we want the same server; referrals will reassign */ + memcpy(&ctx->nfs_server.address, &client->cl_addr, client->cl_addrlen); + ctx->nfs_server.addrlen = client->cl_addrlen; + ctx->nfs_server.port = server->port; + + ctx->version = client->rpc_ops->version; + ctx->minorversion = client->cl_minorversion; + ctx->nfs_mod = client->cl_nfs_mod; + __module_get(ctx->nfs_mod->owner); + + ret = client->rpc_ops->submount(fc, server); + if (ret < 0) { + mnt = ERR_PTR(ret); + goto out_fc; + } + + up_write(&fc->root->d_sb->s_umount); + mnt = vfs_create_mount(fc); if (IS_ERR(mnt)) - goto out; + goto out_fc; mntget(mnt); /* prevent immediate expiration */ mnt_set_expiry(mnt, &nfs_automount_list); schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout); -out: - nfs_free_fattr(fattr); - nfs_free_fhandle(fh); +out_fc: + put_fs_context(fc); return mnt; } @@ -219,61 +250,62 @@ void nfs_release_automount_timer(void) * @authflavor: security flavor to use when performing the mount * */ -struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, - struct nfs_fattr *fattr, rpc_authflavor_t authflavor) +int nfs_do_submount(struct fs_context *fc) { - struct super_block *sb = dentry->d_sb; - struct nfs_clone_mount mountdata = { - .sb = sb, - .dentry = dentry, - .authflavor = authflavor, - }; - struct nfs_mount_info mount_info = { - .inherited_bsize = sb->s_blocksize_bits, - .cloned = &mountdata, - .mntfh = fh, - .nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod, - }; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry = ctx->clone_data.dentry; struct nfs_server *server; - struct vfsmount *mnt; - char *page = (char *) __get_free_page(GFP_USER); - char *devname; + char *buffer, *p; + int ret; - if (page == NULL) - return ERR_PTR(-ENOMEM); + /* create a new volume representation */ + server = ctx->nfs_mod->rpc_ops->clone_server(NFS_SB(ctx->clone_data.sb), + ctx->mntfh, + ctx->clone_data.fattr, + ctx->selected_flavor); - server = mount_info.nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, - fattr, authflavor); if (IS_ERR(server)) - return ERR_CAST(server); + return PTR_ERR(server); - mount_info.server = server; + ctx->server = server; - devname = nfs_devname(dentry, page, PAGE_SIZE); - if (IS_ERR(devname)) - mnt = ERR_CAST(devname); - else - mnt = vfs_submount(dentry, &nfs_prepared_fs_type, devname, &mount_info); + buffer = kmalloc(4096, GFP_USER); + if (!buffer) + return -ENOMEM; - if (mount_info.server) - nfs_free_server(mount_info.server); - free_page((unsigned long)page); - return mnt; + ctx->internal = true; + ctx->clone_data.inherited_bsize = ctx->clone_data.sb->s_blocksize_bits; + + p = nfs_devname(dentry, buffer, 4096); + if (IS_ERR(p)) { + dprintk("NFS: Couldn't determine submount pathname\n"); + ret = PTR_ERR(p); + } else { + ret = vfs_parse_fs_string(fc, "source", p, buffer + 4096 - p); + if (!ret) + ret = vfs_get_tree(fc); + } + kfree(buffer); + return ret; } EXPORT_SYMBOL_GPL(nfs_do_submount); -struct vfsmount *nfs_submount(struct nfs_server *server, struct dentry *dentry, - struct nfs_fh *fh, struct nfs_fattr *fattr) +int nfs_submount(struct fs_context *fc, struct nfs_server *server) { - int err; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry = ctx->clone_data.dentry; struct dentry *parent = dget_parent(dentry); + int err; /* Look it up again to get its attributes */ - err = server->nfs_client->rpc_ops->lookup(d_inode(parent), &dentry->d_name, fh, fattr, NULL); + err = server->nfs_client->rpc_ops->lookup(d_inode(parent), &dentry->d_name, + ctx->mntfh, ctx->clone_data.fattr, + NULL); dput(parent); if (err != 0) - return ERR_PTR(err); + return err; - return nfs_do_submount(dentry, fh, fattr, server->client->cl_auth->au_flavor); + ctx->selected_flavor = server->client->cl_auth->au_flavor; + return nfs_do_submount(fc); } EXPORT_SYMBOL_GPL(nfs_submount); diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h index 09602dc1889f..1b950b66b3bb 100644 --- a/fs/nfs/nfs3_fs.h +++ b/fs/nfs/nfs3_fs.h @@ -27,7 +27,7 @@ static inline int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, #endif /* CONFIG_NFS_V3_ACL */ /* nfs3client.c */ -struct nfs_server *nfs3_create_server(struct nfs_mount_info *); +struct nfs_server *nfs3_create_server(struct fs_context *); struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c index a340b5d0e1a3..bfd9b5f03455 100644 --- a/fs/nfs/nfs3client.c +++ b/fs/nfs/nfs3client.c @@ -46,9 +46,10 @@ static inline void nfs_init_server_aclclient(struct nfs_server *server) } #endif -struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info) +struct nfs_server *nfs3_create_server(struct fs_context *fc) { - struct nfs_server *server = nfs_create_server(mount_info); + struct nfs_server *server = nfs_create_server(fc); + /* Create a client RPC handle for the NFS v3 ACL management interface */ if (!IS_ERR(server)) nfs_init_server_aclclient(server); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index a3ad2d46fd42..912a0b0c9bb9 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -963,7 +963,7 @@ const struct nfs_rpc_ops nfs_v3_clientops = { .nlmclnt_ops = &nlmclnt_fl_close_lock_ops, .getroot = nfs3_proc_get_root, .submount = nfs_submount, - .try_mount = nfs_try_mount, + .try_get_tree = nfs_try_get_tree, .getattr = nfs3_proc_getattr, .setattr = nfs3_proc_setattr, .lookup = nfs3_proc_lookup, diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 67ecd7bb512f..a6ee4de47774 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -268,14 +268,13 @@ extern const struct dentry_operations nfs4_dentry_operations; int nfs_atomic_open(struct inode *, struct dentry *, struct file *, unsigned, umode_t); -/* super.c */ +/* fs_context.c */ extern struct file_system_type nfs4_fs_type; /* nfs4namespace.c */ struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, const struct qstr *); -struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); +int nfs4_submount(struct fs_context *, struct nfs_server *); int nfs4_replace_transport(struct nfs_server *server, const struct nfs4_fs_locations *locations); @@ -517,7 +516,6 @@ extern const nfs4_stateid invalid_stateid; /* nfs4super.c */ struct nfs_mount_info; extern struct nfs_subversion nfs_v4; -struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *); extern bool nfs4_disable_idmapping; extern unsigned short max_session_slots; extern unsigned short max_session_cb_slots; @@ -527,6 +525,9 @@ extern bool recover_lost_locks; #define NFS4_CLIENT_ID_UNIQ_LEN (64) extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN]; +extern int nfs4_try_get_tree(struct fs_context *); +extern int nfs4_get_referral_tree(struct fs_context *); + /* nfs4sysctl.c */ #ifdef CONFIG_SYSCTL int nfs4_register_sysctl(void); diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 2ee2281ce404..be26fbe06863 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1052,9 +1052,9 @@ static int nfs4_server_common_setup(struct nfs_server *server, /* * Create a version 4 volume record */ -static int nfs4_init_server(struct nfs_server *server, - struct nfs_fs_context *ctx) +static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct rpc_timeout timeparms; int error; @@ -1076,15 +1076,15 @@ static int nfs4_init_server(struct nfs_server *server, /* Get a client record */ error = nfs4_set_client(server, - ctx->nfs_server.hostname, - (const struct sockaddr *)&ctx->nfs_server.address, - ctx->nfs_server.addrlen, - ctx->client_address, - ctx->nfs_server.protocol, - &timeparms, - ctx->minorversion, - ctx->nfs_server.nconnect, - ctx->net); + ctx->nfs_server.hostname, + &ctx->nfs_server.address, + ctx->nfs_server.addrlen, + ctx->client_address, + ctx->nfs_server.protocol, + &timeparms, + ctx->minorversion, + ctx->nfs_server.nconnect, + fc->net_ns); if (error < 0) return error; @@ -1107,10 +1107,9 @@ static int nfs4_init_server(struct nfs_server *server, * Create a version 4 volume record * - keyed on server and FSID */ -/*struct nfs_server *nfs4_create_server(const struct nfs_fs_context *data, - struct nfs_fh *mntfh)*/ -struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) +struct nfs_server *nfs4_create_server(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_server *server; bool auth_probe; int error; @@ -1121,14 +1120,14 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) server->cred = get_cred(current_cred()); - auth_probe = mount_info->ctx->auth_info.flavor_len < 1; + auth_probe = ctx->auth_info.flavor_len < 1; /* set up the general RPC client */ - error = nfs4_init_server(server, mount_info->ctx); + error = nfs4_init_server(server, fc); if (error < 0) goto error; - error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); + error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); if (error < 0) goto error; @@ -1142,9 +1141,9 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) /* * Create an NFS4 referral server record */ -struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, - struct nfs_fh *mntfh) +struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_client *parent_client; struct nfs_server *server, *parent_server; bool auth_probe; @@ -1154,7 +1153,7 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, if (!server) return ERR_PTR(-ENOMEM); - parent_server = NFS_SB(data->sb); + parent_server = NFS_SB(ctx->clone_data.sb); parent_client = parent_server->nfs_client; server->cred = get_cred(parent_server->cred); @@ -1164,10 +1163,11 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, /* Get a client representation */ #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) - rpc_set_port(data->addr, NFS_RDMA_PORT); - error = nfs4_set_client(server, data->hostname, - data->addr, - data->addrlen, + rpc_set_port(&ctx->nfs_server.address, NFS_RDMA_PORT); + error = nfs4_set_client(server, + ctx->nfs_server.hostname, + &ctx->nfs_server.address, + ctx->nfs_server.addrlen, parent_client->cl_ipaddr, XPRT_TRANSPORT_RDMA, parent_server->client->cl_timeout, @@ -1178,10 +1178,11 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, goto init_server; #endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ - rpc_set_port(data->addr, NFS_PORT); - error = nfs4_set_client(server, data->hostname, - data->addr, - data->addrlen, + rpc_set_port(&ctx->nfs_server.address, NFS_PORT); + error = nfs4_set_client(server, + ctx->nfs_server.hostname, + &ctx->nfs_server.address, + ctx->nfs_server.addrlen, parent_client->cl_ipaddr, XPRT_TRANSPORT_TCP, parent_server->client->cl_timeout, @@ -1194,13 +1195,14 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) init_server: #endif - error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); + error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, + ctx->selected_flavor); if (error < 0) goto error; auth_probe = parent_server->auth_info.flavor_len < 1; - error = nfs4_server_common_setup(server, mntfh, auth_probe); + error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); if (error < 0) goto error; diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 2e460c33ae48..37999925040a 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -8,6 +8,7 @@ * NFSv4 namespace */ +#include #include #include #include @@ -21,37 +22,64 @@ #include #include "internal.h" #include "nfs4_fs.h" +#include "nfs.h" #include "dns_resolve.h" #define NFSDBG_FACILITY NFSDBG_VFS +/* + * Work out the length that an NFSv4 path would render to as a standard posix + * path, with a leading slash but no terminating slash. + */ +static ssize_t nfs4_pathname_len(const struct nfs4_pathname *pathname) +{ + ssize_t len = 0; + int i; + + for (i = 0; i < pathname->ncomponents; i++) { + const struct nfs4_string *component = &pathname->components[i]; + + if (component->len > NAME_MAX) + goto too_long; + len += 1 + component->len; /* Adding "/foo" */ + if (len > PATH_MAX) + goto too_long; + } + return len; + +too_long: + return -ENAMETOOLONG; +} + /* * Convert the NFSv4 pathname components into a standard posix path. - * - * Note that the resulting string will be placed at the end of the buffer */ -static inline char *nfs4_pathname_string(const struct nfs4_pathname *pathname, - char *buffer, ssize_t buflen) +static char *nfs4_pathname_string(const struct nfs4_pathname *pathname, + unsigned short *_len) { - char *end = buffer + buflen; - int n; + ssize_t len; + char *buf, *p; + int i; + + len = nfs4_pathname_len(pathname); + if (len < 0) + return ERR_PTR(len); + *_len = len; - *--end = '\0'; - buflen--; - - n = pathname->ncomponents; - while (--n >= 0) { - const struct nfs4_string *component = &pathname->components[n]; - buflen -= component->len + 1; - if (buflen < 0) - goto Elong; - end -= component->len; - memcpy(end, component->data, component->len); - *--end = '/'; + p = buf = kmalloc(len + 1, GFP_KERNEL); + if (!buf) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < pathname->ncomponents; i++) { + const struct nfs4_string *component = &pathname->components[i]; + + *p++ = '/'; + memcpy(p, component->data, component->len); + p += component->len; } - return end; -Elong: - return ERR_PTR(-ENAMETOOLONG); + + *p = 0; + return buf; } /* @@ -100,21 +128,25 @@ static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen) */ static int nfs4_validate_fspath(struct dentry *dentry, const struct nfs4_fs_locations *locations, - char *page, char *page2) + struct nfs_fs_context *ctx) { - const char *path, *fs_path; + const char *path; + char *buf; + int n; - path = nfs4_path(dentry, page, PAGE_SIZE); - if (IS_ERR(path)) + buf = kmalloc(4096, GFP_KERNEL); + path = nfs4_path(dentry, buf, 4096); + if (IS_ERR(path)) { + kfree(buf); return PTR_ERR(path); + } - fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE); - if (IS_ERR(fs_path)) - return PTR_ERR(fs_path); - - if (strncmp(path, fs_path, strlen(fs_path)) != 0) { + n = strncmp(path, ctx->nfs_server.export_path, + ctx->nfs_server.export_path_len); + kfree(buf); + if (n != 0) { dprintk("%s: path %s does not begin with fsroot %s\n", - __func__, path, fs_path); + __func__, path, ctx->nfs_server.export_path); return -ENOENT; } @@ -236,55 +268,70 @@ nfs4_negotiate_security(struct rpc_clnt *clnt, struct inode *inode, return new; } -static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, - char *page, char *page2, - const struct nfs4_fs_location *location) +static int try_location(struct fs_context *fc, + const struct nfs4_fs_location *location) { - const size_t addr_bufsize = sizeof(struct sockaddr_storage); - struct net *net = rpc_net_ns(NFS_SB(mountdata->sb)->client); - struct vfsmount *mnt = ERR_PTR(-ENOENT); - char *mnt_path; - unsigned int maxbuflen; - unsigned int s; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + unsigned int len, s; + char *source, *p; + int ret = -ENOENT; + + /* Allocate a buffer big enough to hold any of the hostnames plus a + * terminating char and also a buffer big enough to hold the hostname + * plus a colon plus the path. + */ + len = 0; + for (s = 0; s < location->nservers; s++) { + const struct nfs4_string *buf = &location->servers[s]; + if (buf->len > len) + len = buf->len; + } - mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE); - if (IS_ERR(mnt_path)) - return ERR_CAST(mnt_path); - mountdata->mnt_path = mnt_path; - maxbuflen = mnt_path - 1 - page2; + kfree(ctx->nfs_server.hostname); + ctx->nfs_server.hostname = kmalloc(len + 1, GFP_KERNEL); + if (!ctx->nfs_server.hostname) + return -ENOMEM; - mountdata->addr = kmalloc(addr_bufsize, GFP_KERNEL); - if (mountdata->addr == NULL) - return ERR_PTR(-ENOMEM); + source = kmalloc(len + 1 + ctx->nfs_server.export_path_len + 1, + GFP_KERNEL); + if (!source) + return -ENOMEM; + kfree(fc->source); + fc->source = source; for (s = 0; s < location->nservers; s++) { const struct nfs4_string *buf = &location->servers[s]; - if (buf->len <= 0 || buf->len >= maxbuflen) - continue; - if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len)) continue; - mountdata->addrlen = nfs_parse_server_name(buf->data, buf->len, - mountdata->addr, addr_bufsize, net); - if (mountdata->addrlen == 0) + ctx->nfs_server.addrlen = + nfs_parse_server_name(buf->data, buf->len, + &ctx->nfs_server.address, + sizeof(ctx->nfs_server._address), + fc->net_ns); + if (ctx->nfs_server.addrlen == 0) continue; - memcpy(page2, buf->data, buf->len); - page2[buf->len] = '\0'; - mountdata->hostname = page2; + rpc_set_port(&ctx->nfs_server.address, NFS_PORT); - snprintf(page, PAGE_SIZE, "%s:%s", - mountdata->hostname, - mountdata->mnt_path); + memcpy(ctx->nfs_server.hostname, buf->data, buf->len); + ctx->nfs_server.hostname[buf->len] = '\0'; - mnt = vfs_submount(mountdata->dentry, &nfs4_referral_fs_type, page, mountdata); - if (!IS_ERR(mnt)) - break; + p = source; + memcpy(p, buf->data, buf->len); + p += buf->len; + *p++ = ':'; + memcpy(p, ctx->nfs_server.export_path, ctx->nfs_server.export_path_len); + p += ctx->nfs_server.export_path_len; + *p = 0; + + ret = nfs4_get_referral_tree(fc); + if (ret == 0) + return 0; } - kfree(mountdata->addr); - return mnt; + + return ret; } /** @@ -293,38 +340,31 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, * @locations: array of NFSv4 server location information * */ -static struct vfsmount *nfs_follow_referral(struct dentry *dentry, - const struct nfs4_fs_locations *locations) +static int nfs_follow_referral(struct fs_context *fc, + const struct nfs4_fs_locations *locations) { - struct vfsmount *mnt = ERR_PTR(-ENOENT); - struct nfs_clone_mount mountdata = { - .sb = dentry->d_sb, - .dentry = dentry, - .authflavor = NFS_SB(dentry->d_sb)->client->cl_auth->au_flavor, - }; - char *page = NULL, *page2 = NULL; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + char *export_path; int loc, error; if (locations == NULL || locations->nlocations <= 0) - goto out; + return -ENOENT; - dprintk("%s: referral at %pd2\n", __func__, dentry); + dprintk("%s: referral at %pd2\n", __func__, ctx->clone_data.dentry); - page = (char *) __get_free_page(GFP_USER); - if (!page) - goto out; + export_path = nfs4_pathname_string(&locations->fs_path, + &ctx->nfs_server.export_path_len); + if (IS_ERR(export_path)) + return PTR_ERR(export_path); - page2 = (char *) __get_free_page(GFP_USER); - if (!page2) - goto out; + ctx->nfs_server.export_path = export_path; /* Ensure fs path is a prefix of current dentry path */ - error = nfs4_validate_fspath(dentry, locations, page, page2); - if (error < 0) { - mnt = ERR_PTR(error); - goto out; - } + error = nfs4_validate_fspath(ctx->clone_data.dentry, locations, ctx); + if (error < 0) + return error; + error = -ENOENT; for (loc = 0; loc < locations->nlocations; loc++) { const struct nfs4_fs_location *location = &locations->locations[loc]; @@ -332,15 +372,12 @@ static struct vfsmount *nfs_follow_referral(struct dentry *dentry, location->rootpath.ncomponents == 0) continue; - mnt = try_location(&mountdata, page, page2, location); - if (!IS_ERR(mnt)) - break; + error = try_location(fc, location); + if (error == 0) + return 0; } -out: - free_page((unsigned long) page); - free_page((unsigned long) page2); - return mnt; + return error; } /* @@ -348,71 +385,73 @@ static struct vfsmount *nfs_follow_referral(struct dentry *dentry, * @dentry - dentry of referral * */ -static struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry) +static int nfs_do_refmount(struct fs_context *fc, struct rpc_clnt *client) { - struct vfsmount *mnt = ERR_PTR(-ENOMEM); - struct dentry *parent; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry, *parent; struct nfs4_fs_locations *fs_locations = NULL; struct page *page; - int err; + int err = -ENOMEM; /* BUG_ON(IS_ROOT(dentry)); */ page = alloc_page(GFP_KERNEL); - if (page == NULL) - return mnt; + if (!page) + return -ENOMEM; fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); - if (fs_locations == NULL) + if (!fs_locations) goto out_free; /* Get locations */ - mnt = ERR_PTR(-ENOENT); - + dentry = ctx->clone_data.dentry; parent = dget_parent(dentry); dprintk("%s: getting locations for %pd2\n", __func__, dentry); err = nfs4_proc_fs_locations(client, d_inode(parent), &dentry->d_name, fs_locations, page); dput(parent); - if (err != 0 || - fs_locations->nlocations <= 0 || + if (err != 0) + goto out_free_2; + + err = -ENOENT; + if (fs_locations->nlocations <= 0 || fs_locations->fs_path.ncomponents <= 0) - goto out_free; + goto out_free_2; - mnt = nfs_follow_referral(dentry, fs_locations); + err = nfs_follow_referral(fc, fs_locations); +out_free_2: + kfree(fs_locations); out_free: __free_page(page); - kfree(fs_locations); - return mnt; + return err; } -struct vfsmount *nfs4_submount(struct nfs_server *server, struct dentry *dentry, - struct nfs_fh *fh, struct nfs_fattr *fattr) +int nfs4_submount(struct fs_context *fc, struct nfs_server *server) { - rpc_authflavor_t flavor = server->client->cl_auth->au_flavor; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry = ctx->clone_data.dentry; struct dentry *parent = dget_parent(dentry); struct inode *dir = d_inode(parent); const struct qstr *name = &dentry->d_name; struct rpc_clnt *client; - struct vfsmount *mnt; + int ret; /* Look it up again to get its attributes and sec flavor */ - client = nfs4_proc_lookup_mountpoint(dir, name, fh, fattr); + client = nfs4_proc_lookup_mountpoint(dir, name, ctx->mntfh, + ctx->clone_data.fattr); dput(parent); if (IS_ERR(client)) - return ERR_CAST(client); + return PTR_ERR(client); - if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { - mnt = nfs_do_refmount(client, dentry); - goto out; + if (ctx->clone_data.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { + ret = nfs_do_refmount(fc, client); + } else { + ctx->selected_flavor = client->cl_auth->au_flavor; + ret = nfs_do_submount(fc); } - if (client->cl_auth->au_flavor != flavor) - flavor = client->cl_auth->au_flavor; - mnt = nfs_do_submount(dentry, fh, fattr, flavor); -out: rpc_shutdown_client(client); - return mnt; + return ret; } /* diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 1406858bae6c..2f31ece2f4a4 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -9895,7 +9895,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = { .file_ops = &nfs4_file_operations, .getroot = nfs4_proc_get_root, .submount = nfs4_submount, - .try_mount = nfs4_try_mount, + .try_get_tree = nfs4_try_get_tree, .getattr = nfs4_proc_getattr, .setattr = nfs4_proc_setattr, .lookup = nfs4_proc_lookup, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index ca9740137cfe..3b27c5e3d781 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -4,6 +4,7 @@ */ #include #include +#include #include #include #include "delegation.h" @@ -18,16 +19,6 @@ static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc); static void nfs4_evict_inode(struct inode *inode); -static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); - -struct file_system_type nfs4_referral_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_referral_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; static const struct super_operations nfs4_sops = { .alloc_inode = nfs_alloc_inode, @@ -41,16 +32,15 @@ static const struct super_operations nfs4_sops = { .show_devname = nfs_show_devname, .show_path = nfs_show_path, .show_stats = nfs_show_stats, - .remount_fs = nfs_remount, }; struct nfs_subversion nfs_v4 = { - .owner = THIS_MODULE, - .nfs_fs = &nfs4_fs_type, - .rpc_vers = &nfs_version4, - .rpc_ops = &nfs_v4_clientops, - .sops = &nfs4_sops, - .xattr = nfs4_xattr_handlers, + .owner = THIS_MODULE, + .nfs_fs = &nfs4_fs_type, + .rpc_vers = &nfs_version4, + .rpc_ops = &nfs_v4_clientops, + .sops = &nfs4_sops, + .xattr = nfs4_xattr_handlers, }; static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc) @@ -147,105 +137,123 @@ static void nfs_referral_loop_unprotect(void) kfree(p); } -static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, - struct nfs_mount_info *info, - const char *hostname, - const char *export_path) +static int do_nfs4_mount(struct nfs_server *server, + struct fs_context *fc, + const char *hostname, + const char *export_path) { + struct nfs_fs_context *root_ctx; + struct fs_context *root_fc; struct vfsmount *root_mnt; struct dentry *dentry; - char *root_devname; - int err; size_t len; + int ret; + + struct fs_parameter param = { + .key = "source", + .type = fs_value_is_string, + .dirfd = -1, + }; if (IS_ERR(server)) - return ERR_CAST(server); + return PTR_ERR(server); - len = strlen(hostname) + 5; - root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) { + root_fc = vfs_dup_fs_context(fc); + if (IS_ERR(root_fc)) { nfs_free_server(server); - return ERR_PTR(-ENOMEM); + return PTR_ERR(root_fc); + } + kfree(root_fc->source); + root_fc->source = NULL; + + root_ctx = nfs_fc2context(root_fc); + root_ctx->internal = true; + root_ctx->server = server; + /* We leave export_path unset as it's not used to find the root. */ + + len = strlen(hostname) + 5; + param.string = kmalloc(len, GFP_KERNEL); + if (param.string == NULL) { + put_fs_context(root_fc); + return -ENOMEM; } /* Does hostname needs to be enclosed in brackets? */ if (strchr(hostname, ':')) - snprintf(root_devname, len, "[%s]:/", hostname); + param.size = snprintf(param.string, len, "[%s]:/", hostname); else - snprintf(root_devname, len, "%s:/", hostname); - info->server = server; - root_mnt = vfs_kern_mount(&nfs_prepared_fs_type, flags, root_devname, info); - if (info->server) - nfs_free_server(info->server); - info->server = NULL; - kfree(root_devname); + param.size = snprintf(param.string, len, "%s:/", hostname); + ret = vfs_parse_fs_param(root_fc, ¶m); + kfree(param.string); + if (ret < 0) { + put_fs_context(root_fc); + return ret; + } + root_mnt = fc_mount(root_fc); + put_fs_context(root_fc); if (IS_ERR(root_mnt)) - return ERR_CAST(root_mnt); + return PTR_ERR(root_mnt); - err = nfs_referral_loop_protect(); - if (err) { + ret = nfs_referral_loop_protect(); + if (ret) { mntput(root_mnt); - return ERR_PTR(err); + return ret; } dentry = mount_subtree(root_mnt, export_path); nfs_referral_loop_unprotect(); - return dentry; + if (IS_ERR(dentry)) + return PTR_ERR(dentry); + + fc->root = dentry; + return 0; } -struct dentry *nfs4_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info) +int nfs4_try_get_tree(struct fs_context *fc) { - struct nfs_fs_context *ctx = mount_info->ctx; - struct dentry *res; - - dfprintk(MOUNT, "--> nfs4_try_mount()\n"); + struct nfs_fs_context *ctx = nfs_fc2context(fc); + int err; - res = do_nfs4_mount(nfs4_create_server(mount_info), - flags, mount_info, - ctx->nfs_server.hostname, - ctx->nfs_server.export_path); + dfprintk(MOUNT, "--> nfs4_try_get_tree()\n"); - dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", - PTR_ERR_OR_ZERO(res), - IS_ERR(res) ? " [error]" : ""); - return res; + /* We create a mount for the server's root, walk to the requested + * location and then create another mount for that. + */ + err= do_nfs4_mount(nfs4_create_server(fc), + fc, ctx->nfs_server.hostname, + ctx->nfs_server.export_path); + if (err) { + dfprintk(MOUNT, "<-- nfs4_try_get_tree() = %d [error]\n", err); + } else { + dfprintk(MOUNT, "<-- nfs4_try_get_tree() = 0\n"); + } + return err; } /* * Create an NFS4 server record on referral traversal */ -static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) +int nfs4_get_referral_tree(struct fs_context *fc) { - struct nfs_clone_mount *data = raw_data; - struct nfs_mount_info mount_info = { - .cloned = data, - .nfs_mod = &nfs_v4, - }; - struct dentry *res; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + int err; dprintk("--> nfs4_referral_mount()\n"); - mount_info.mntfh = nfs_alloc_fhandle(); - if (!mount_info.mntfh) - return ERR_PTR(-ENOMEM); - - res = do_nfs4_mount(nfs4_create_referral_server(mount_info.cloned, - mount_info.mntfh), - flags, &mount_info, data->hostname, data->mnt_path); - - dprintk("<-- nfs4_referral_mount() = %d%s\n", - PTR_ERR_OR_ZERO(res), - IS_ERR(res) ? " [error]" : ""); - - nfs_free_fhandle(mount_info.mntfh); - return res; + /* create a new volume representation */ + err = do_nfs4_mount(nfs4_create_referral_server(fc), + fc, ctx->nfs_server.hostname, + ctx->nfs_server.export_path); + if (err) { + dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = %d [error]\n", err); + } else { + dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = 0\n"); + } + return err; } - static int __init init_nfs_v4(void) { int err; diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 5552fa8b6e12..03b175fd94b9 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -707,7 +707,7 @@ const struct nfs_rpc_ops nfs_v2_clientops = { .file_ops = &nfs_file_operations, .getroot = nfs_proc_get_root, .submount = nfs_submount, - .try_mount = nfs_try_mount, + .try_get_tree = nfs_try_get_tree, .getattr = nfs_proc_getattr, .setattr = nfs_proc_setattr, .lookup = nfs_proc_lookup, diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 9aa27093d8b6..60174a30a91a 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -70,28 +70,6 @@ #define NFSDBG_FACILITY NFSDBG_VFS -static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); - -struct file_system_type nfs_fs_type = { - .owner = THIS_MODULE, - .name = "nfs", - .mount = nfs_fs_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; -MODULE_ALIAS_FS("nfs"); -EXPORT_SYMBOL_GPL(nfs_fs_type); - -struct file_system_type nfs_prepared_fs_type = { - .owner = THIS_MODULE, - .name = "nfs", - .mount = nfs_prepared_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; -EXPORT_SYMBOL_GPL(nfs_prepared_fs_type); - const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, .free_inode = nfs_free_inode, @@ -104,22 +82,10 @@ const struct super_operations nfs_sops = { .show_devname = nfs_show_devname, .show_path = nfs_show_path, .show_stats = nfs_show_stats, - .remount_fs = nfs_remount, }; EXPORT_SYMBOL_GPL(nfs_sops); #if IS_ENABLED(CONFIG_NFS_V4) -struct file_system_type nfs4_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs_fs_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; -MODULE_ALIAS_FS("nfs4"); -MODULE_ALIAS("nfs4"); -EXPORT_SYMBOL_GPL(nfs4_fs_type); - static int __init register_nfs4_fs(void) { return register_filesystem(&nfs4_fs_type); @@ -779,11 +745,12 @@ static int nfs_verify_authflavors(struct nfs_fs_context *ctx, * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_request_mount(struct nfs_fs_context *ctx, +static int nfs_request_mount(struct fs_context *fc, struct nfs_fh *root_fh, rpc_authflavor_t *server_authlist, unsigned int *server_authlist_len) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_mount_request request = { .sap = (struct sockaddr *) &ctx->mount_server.address, @@ -793,7 +760,7 @@ static int nfs_request_mount(struct nfs_fs_context *ctx, .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, - .net = ctx->net, + .net = fc->net_ns, }; int status; @@ -838,20 +805,18 @@ static int nfs_request_mount(struct nfs_fs_context *ctx, return 0; } -static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info) +static struct nfs_server *nfs_try_mount_request(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); int status; unsigned int i; bool tried_auth_unix = false; bool auth_null_in_list = false; struct nfs_server *server = ERR_PTR(-EACCES); - struct nfs_fs_context *ctx = mount_info->ctx; rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; unsigned int authlist_len = ARRAY_SIZE(authlist); - struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - status = nfs_request_mount(ctx, mount_info->mntfh, authlist, - &authlist_len); + status = nfs_request_mount(fc, ctx->mntfh, authlist, &authlist_len); if (status) return ERR_PTR(status); @@ -865,7 +830,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf ctx->selected_flavor); if (status) return ERR_PTR(status); - return nfs_mod->rpc_ops->create_server(mount_info); + return ctx->nfs_mod->rpc_ops->create_server(fc); } /* @@ -892,7 +857,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); ctx->selected_flavor = flavor; - server = nfs_mod->rpc_ops->create_server(mount_info); + server = ctx->nfs_mod->rpc_ops->create_server(fc); if (!IS_ERR(server)) return server; } @@ -908,23 +873,22 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); ctx->selected_flavor = RPC_AUTH_UNIX; - return nfs_mod->rpc_ops->create_server(mount_info); + return ctx->nfs_mod->rpc_ops->create_server(fc); } -static struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); - -struct dentry *nfs_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info) +int nfs_try_get_tree(struct fs_context *fc) { - struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - if (mount_info->ctx->need_mount) - mount_info->server = nfs_try_mount_request(mount_info); + struct nfs_fs_context *ctx = nfs_fc2context(fc); + + if (ctx->need_mount) + ctx->server = nfs_try_mount_request(fc); else - mount_info->server = nfs_mod->rpc_ops->create_server(mount_info); + ctx->server = ctx->nfs_mod->rpc_ops->create_server(fc); - return nfs_fs_mount_common(flags, dev_name, mount_info); + return nfs_get_tree_common(fc); } -EXPORT_SYMBOL_GPL(nfs_try_mount); +EXPORT_SYMBOL_GPL(nfs_try_get_tree); + #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ | NFS_MOUNT_SECURE \ @@ -965,15 +929,11 @@ nfs_compare_remount_data(struct nfs_server *nfss, return 0; } -int -nfs_remount(struct super_block *sb, int *flags, char *raw_data) +int nfs_reconfigure(struct fs_context *fc) { - int error; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct super_block *sb = fc->root->d_sb; struct nfs_server *nfss = sb->s_fs_info; - struct nfs_fs_context *ctx; - struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; - struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; - u32 nfsvers = nfss->nfs_client->rpc_ops->version; sync_filesystem(sb); @@ -983,64 +943,30 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) * ones were explicitly specified. Fall back to legacy behavior and * just return success. */ - if ((nfsvers == 4 && (!options4 || options4->version == 1)) || - (nfsvers <= 3 && (!options || (options->version >= 1 && - options->version <= 6)))) + if (ctx->skip_reconfig_option_check) return 0; - ctx = nfs_alloc_parsed_mount_data(); - if (ctx == NULL) - return -ENOMEM; - - /* fill out struct with values from existing mount */ - ctx->flags = nfss->flags; - ctx->rsize = nfss->rsize; - ctx->wsize = nfss->wsize; - ctx->retrans = nfss->client->cl_timeout->to_retries; - ctx->selected_flavor = nfss->client->cl_auth->au_flavor; - ctx->acregmin = nfss->acregmin / HZ; - ctx->acregmax = nfss->acregmax / HZ; - ctx->acdirmin = nfss->acdirmin / HZ; - ctx->acdirmax = nfss->acdirmax / HZ; - ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; - ctx->nfs_server.port = nfss->port; - ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; - ctx->version = nfsvers; - ctx->minorversion = nfss->nfs_client->cl_minorversion; - ctx->net = current->nsproxy->net_ns; - memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, - ctx->nfs_server.addrlen); - - /* overwrite those values with any that were specified */ - error = -EINVAL; - if (!nfs_parse_mount_options((char *)options, ctx)) - goto out; - /* * noac is a special case. It implies -o sync, but that's not - * necessarily reflected in the mtab options. do_remount_sb + * necessarily reflected in the mtab options. reconfigure_super * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the * remount options, so we have to explicitly reset it. */ - if (ctx->flags & NFS_MOUNT_NOAC) - *flags |= SB_SYNCHRONOUS; + if (ctx->flags & NFS_MOUNT_NOAC) { + fc->sb_flags |= SB_SYNCHRONOUS; + fc->sb_flags_mask |= SB_SYNCHRONOUS; + } /* compare new mount options with old ones */ - error = nfs_compare_remount_data(nfss, ctx); - if (!error) - error = security_sb_remount(sb, ctx->lsm_opts); -out: - nfs_free_parsed_mount_data(ctx); - return error; + return nfs_compare_remount_data(nfss, ctx); } -EXPORT_SYMBOL_GPL(nfs_remount); +EXPORT_SYMBOL_GPL(nfs_reconfigure); /* * Finish setting up an NFS superblock */ -static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) +static void nfs_fill_super(struct super_block *sb, struct nfs_fs_context *ctx) { - struct nfs_fs_context *ctx = mount_info->ctx; struct nfs_server *server = NFS_SB(sb); sb->s_blocksize_bits = 0; @@ -1072,13 +998,14 @@ static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_ nfs_super_set_maxbytes(sb, server->maxfilesize); } -static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) +static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, + const struct fs_context *fc) { const struct nfs_server *a = s->s_fs_info; const struct rpc_clnt *clnt_a = a->client; const struct rpc_clnt *clnt_b = b->client; - if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) + if ((s->s_flags & NFS_SB_MASK) != (fc->sb_flags & NFS_SB_MASK)) goto Ebusy; if (a->nfs_client != b->nfs_client) goto Ebusy; @@ -1103,19 +1030,11 @@ static int nfs_compare_mount_options(const struct super_block *s, const struct n return 0; } -struct nfs_sb_mountdata { - struct nfs_server *server; - int mntflags; -}; - -static int nfs_set_super(struct super_block *s, void *data) +static int nfs_set_super(struct super_block *s, struct fs_context *fc) { - struct nfs_sb_mountdata *sb_mntdata = data; - struct nfs_server *server = sb_mntdata->server; + struct nfs_server *server = fc->s_fs_info; int ret; - s->s_flags = sb_mntdata->mntflags; - s->s_fs_info = server; s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; ret = set_anon_super(s, server); if (ret == 0) @@ -1180,11 +1099,9 @@ static int nfs_compare_userns(const struct nfs_server *old, return 1; } -static int nfs_compare_super(struct super_block *sb, void *data) +static int nfs_compare_super(struct super_block *sb, struct fs_context *fc) { - struct nfs_sb_mountdata *sb_mntdata = data; - struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); - int mntflags = sb_mntdata->mntflags; + struct nfs_server *server = fc->s_fs_info, *old = NFS_SB(sb); if (!nfs_compare_super_address(old, server)) return 0; @@ -1195,13 +1112,12 @@ static int nfs_compare_super(struct super_block *sb, void *data) return 0; if (!nfs_compare_userns(old, server)) return 0; - return nfs_compare_mount_options(sb, server, mntflags); + return nfs_compare_mount_options(sb, server, fc); } #ifdef CONFIG_NFS_FSCACHE static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_fs_context *ctx, - struct nfs_clone_mount *cloned) + struct nfs_fs_context *ctx) { struct nfs_server *nfss = NFS_SB(sb); char *uniq = NULL; @@ -1210,68 +1126,70 @@ static void nfs_get_cache_cookie(struct super_block *sb, nfss->fscache_key = NULL; nfss->fscache = NULL; - if (ctx) { + if (!ctx) + return; + + if (ctx->clone_data.sb) { + struct nfs_server *mnt_s = NFS_SB(ctx->clone_data.sb); + if (!(mnt_s->options & NFS_OPTION_FSCACHE)) + return; + if (mnt_s->fscache_key) { + uniq = mnt_s->fscache_key->key.uniquifier; + ulen = mnt_s->fscache_key->key.uniq_len; + } + } else { if (!(ctx->options & NFS_OPTION_FSCACHE)) return; if (ctx->fscache_uniq) { uniq = ctx->fscache_uniq; ulen = strlen(ctx->fscache_uniq); } - } else if (cloned) { - struct nfs_server *mnt_s = NFS_SB(cloned->sb); - if (!(mnt_s->options & NFS_OPTION_FSCACHE)) - return; - if (mnt_s->fscache_key) { - uniq = mnt_s->fscache_key->key.uniquifier; - ulen = mnt_s->fscache_key->key.uniq_len; - }; - } else return; + } nfs_fscache_get_super_cookie(sb, uniq, ulen); } #else static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_fs_context *parsed, - struct nfs_clone_mount *cloned) + struct nfs_fs_context *ctx) { } #endif -static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, - struct nfs_mount_info *mount_info) +int nfs_get_tree_common(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct super_block *s; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - int (*compare_super)(struct super_block *, void *) = nfs_compare_super; - struct nfs_server *server = mount_info->server; + int (*compare_super)(struct super_block *, struct fs_context *) = nfs_compare_super; + struct nfs_server *server = ctx->server; unsigned long kflags = 0, kflags_out = 0; - struct nfs_sb_mountdata sb_mntdata = { - .mntflags = flags, - .server = server, - }; int error; - mount_info->server = NULL; + ctx->server = NULL; if (IS_ERR(server)) - return ERR_CAST(server); + return PTR_ERR(server); if (server->flags & NFS_MOUNT_UNSHARED) compare_super = NULL; /* -o noac implies -o sync */ if (server->flags & NFS_MOUNT_NOAC) - sb_mntdata.mntflags |= SB_SYNCHRONOUS; + fc->sb_flags |= SB_SYNCHRONOUS; - if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL) - if (mount_info->cloned->sb->s_flags & SB_SYNCHRONOUS) - sb_mntdata.mntflags |= SB_SYNCHRONOUS; + if (ctx->clone_data.sb) + if (ctx->clone_data.sb->s_flags & SB_SYNCHRONOUS) + fc->sb_flags |= SB_SYNCHRONOUS; + + if (server->caps & NFS_CAP_SECURITY_LABEL) + fc->lsm_flags |= SECURITY_LSM_NATIVE_LABELS; /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(mount_info->nfs_mod->nfs_fs, compare_super, nfs_set_super, - flags, &sb_mntdata); + fc->s_fs_info = server; + s = sget_fc(fc, compare_super, nfs_set_super); + fc->s_fs_info = NULL; if (IS_ERR(s)) { - mntroot = ERR_CAST(s); + error = PTR_ERR(s); + dfprintk(MOUNT, "NFS: Couldn't get superblock\n"); goto out_err_nosb; } @@ -1281,44 +1199,41 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, } else { error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), MINOR(server->s_dev)); - if (error) { - mntroot = ERR_PTR(error); + if (error) goto error_splat_super; - } s->s_bdi->ra_pages = server->rpages * NFS_MAX_READAHEAD; server->super = s; } if (!s->s_root) { - unsigned bsize = mount_info->inherited_bsize; + unsigned bsize = ctx->clone_data.inherited_bsize; /* initial superblock/root creation */ - nfs_fill_super(s, mount_info); + nfs_fill_super(s, ctx); if (bsize) { s->s_blocksize_bits = bsize; s->s_blocksize = 1U << bsize; } - nfs_get_cache_cookie(s, mount_info->ctx, mount_info->cloned); - if (!(server->flags & NFS_MOUNT_UNSHARED)) - s->s_iflags |= SB_I_MULTIROOT; + nfs_get_cache_cookie(s, ctx); } - mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); - if (IS_ERR(mntroot)) + error = nfs_get_root(s, fc); + if (error < 0) { + dfprintk(MOUNT, "NFS: Couldn't get root dentry\n"); goto error_splat_super; - + } if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) kflags |= SECURITY_LSM_NATIVE_LABELS; - if (mount_info->cloned) { - if (d_inode(mntroot)->i_fop != &nfs_dir_operations) { + if (ctx->clone_data.sb) { + if (d_inode(fc->root)->i_fop != &nfs_dir_operations) { error = -ESTALE; goto error_splat_root; } /* clone any lsm security options from the parent to the new sb */ - error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, + error = security_sb_clone_mnt_opts(ctx->clone_data.sb, s, kflags, &kflags_out); } else { - error = security_sb_set_mnt_opts(s, mount_info->ctx->lsm_opts, + error = security_sb_set_mnt_opts(s, fc->security, kflags, &kflags_out); } if (error) @@ -1326,67 +1241,25 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; - if (error) - goto error_splat_root; s->s_flags |= SB_ACTIVE; + error = 0; out: - return mntroot; + return error; out_err_nosb: nfs_free_server(server); goto out; error_splat_root: - dput(mntroot); - mntroot = ERR_PTR(error); + dput(fc->root); + fc->root = NULL; error_splat_super: deactivate_locked_super(s); goto out; } -struct dentry *nfs_fs_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - struct nfs_mount_info mount_info = { - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - struct nfs_subversion *nfs_mod; - int error; - - mount_info.ctx = nfs_alloc_parsed_mount_data(); - mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.ctx == NULL || mount_info.mntfh == NULL) - goto out; - - /* Validate the mount data */ - error = nfs_validate_mount_data(fs_type, raw_data, mount_info.ctx, mount_info.mntfh, dev_name); - if (error == NFS_TEXT_DATA) - error = nfs_validate_text_mount_data(raw_data, - mount_info.ctx, dev_name); - if (error < 0) { - mntroot = ERR_PTR(error); - goto out; - } - - nfs_mod = get_nfs_version(mount_info.ctx->version); - if (IS_ERR(nfs_mod)) { - mntroot = ERR_CAST(nfs_mod); - goto out; - } - mount_info.nfs_mod = nfs_mod; - - mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info); - - put_nfs_version(nfs_mod); -out: - nfs_free_parsed_mount_data(mount_info.ctx); - nfs_free_fhandle(mount_info.mntfh); - return mntroot; -} -EXPORT_SYMBOL_GPL(nfs_fs_mount); - /* * Destroy an NFS2/3 superblock */ @@ -1404,17 +1277,6 @@ void nfs_kill_super(struct super_block *s) } EXPORT_SYMBOL_GPL(nfs_kill_super); -/* - * Internal use only: mount_info is already set up by caller. - * Used for mountpoint crossings and for nfs4 root. - */ -static struct dentry * -nfs_prepared_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - return nfs_fs_mount_common(flags, dev_name, raw_data); -} - #if IS_ENABLED(CONFIG_NFS_V4) /* diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 82bdb91da2ae..ed9f215d03ea 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1622,6 +1622,7 @@ struct nfs_subversion; struct nfs_mount_info; struct nfs_client_initdata; struct nfs_pageio_descriptor; +struct fs_context; /* * RPC procedure vector for NFSv2/NFSv3 demuxing @@ -1636,9 +1637,8 @@ struct nfs_rpc_ops { int (*getroot) (struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); - struct vfsmount *(*submount) (struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); - struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *); + int (*submount) (struct fs_context *, struct nfs_server *); + int (*try_get_tree) (struct fs_context *); int (*getattr) (struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *, struct inode *); @@ -1705,7 +1705,7 @@ struct nfs_rpc_ops { struct nfs_client *(*init_client) (struct nfs_client *, const struct nfs_client_initdata *); void (*free_client) (struct nfs_client *); - struct nfs_server *(*create_server)(struct nfs_mount_info *); + struct nfs_server *(*create_server)(struct fs_context *); struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); }; From patchwork Fri Sep 13 12:17:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11144573 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 293561395 for ; Fri, 13 Sep 2019 12:18:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F39F3208C2 for ; Fri, 13 Sep 2019 12:18:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387739AbfIMMR6 (ORCPT ); Fri, 13 Sep 2019 08:17:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33768 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387523AbfIMMRv (ORCPT ); Fri, 13 Sep 2019 08:17:51 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6D0AE8AC6FD; Fri, 13 Sep 2019 12:17:51 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-122-52.rdu2.redhat.com [10.10.122.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6B11A5D9E1; Fri, 13 Sep 2019 12:17:50 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 3752120F44; Fri, 13 Sep 2019 08:17:49 -0400 (EDT) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 26/26] NFS: Attach supplementary error information to fs_context. Date: Fri, 13 Sep 2019 08:17:48 -0400 Message-Id: <20190913121748.25391-27-smayhew@redhat.com> In-Reply-To: <20190913121748.25391-1-smayhew@redhat.com> References: <20190913121748.25391-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.69]); Fri, 13 Sep 2019 12:17:51 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Split out from commit "NFS: Add fs_context support." Add wrappers nfs_errorf(), nfs_invalf(), and nfs_warnf() which log error information to the fs_context. Convert some printk's to use these new wrappers instead. Signed-off-by: Scott Mayhew --- fs/nfs/fs_context.c | 105 +++++++++++++++----------------------------- fs/nfs/getroot.c | 3 ++ fs/nfs/internal.h | 4 ++ fs/nfs/namespace.c | 2 +- fs/nfs/nfs4super.c | 2 + fs/nfs/super.c | 4 +- 6 files changed, 48 insertions(+), 72 deletions(-) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 0bf346cdea18..c0c661aea27d 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -318,10 +318,8 @@ static int nfs_auth_info_add(struct fs_context *fc, return 0; } - if (auth_info->flavor_len + 1 >= max_flavor_len) { - dfprintk(MOUNT, "NFS: too many sec= flavors\n"); - return -EINVAL; - } + if (auth_info->flavor_len + 1 >= max_flavor_len) + return nfs_invalf(fc, "NFS: too many sec= flavors"); auth_info->flavors[auth_info->flavor_len++] = flavor; return 0; @@ -378,9 +376,7 @@ static int nfs_parse_security_flavors(struct fs_context *fc, pseudoflavor = RPC_AUTH_GSS_SPKMP; break; default: - dfprintk(MOUNT, - "NFS: sec= option '%s' not recognized\n", p); - return -EINVAL; + return nfs_invalf(fc, "NFS: sec=%s option not recognized", p); } ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); @@ -425,8 +421,7 @@ static int nfs_parse_version_string(struct fs_context *fc, ctx->minorversion = 2; break; default: - dfprintk(MOUNT, "NFS: Unsupported NFS version\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unsupported NFS version"); } return 0; } @@ -451,10 +446,8 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, switch (opt) { case Opt_source: - if (fc->source) { - dfprintk(MOUNT, "NFS: Multiple sources not supported\n"); - return -EINVAL; - } + if (fc->source) + return nfs_invalf(fc, "NFS: Multiple sources not supported"); fc->source = param->string; param->string = NULL; break; @@ -664,8 +657,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, xprt_load_transport(param->string); break; default: - dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unrecognized transport protocol"); } ctx->protofamily = protofamily; @@ -688,8 +680,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, break; case Opt_xprt_rdma: /* not used for side protocols */ default: - dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unrecognized transport protocol"); } ctx->mountfamily = mountfamily; break; @@ -774,13 +765,11 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, return 0; out_invalid_value: - printk(KERN_INFO "NFS: Bad mount option value specified\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Bad mount option value specified"); out_invalid_address: - printk(KERN_INFO "NFS: Bad IP address specified\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Bad IP address specified"); out_of_bounds: - printk(KERN_INFO "NFS: Value for '%s' out of range\n", param->key); + nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key); return -ERANGE; } @@ -846,19 +835,15 @@ static int nfs_parse_source(struct fs_context *fc, return 0; out_bad_devname: - dfprintk(MOUNT, "NFS: device name not in host:path format\n"); - return -EINVAL; - + return nfs_invalf(fc, "NFS: device name not in host:path format"); out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); + nfs_errorf(fc, "NFS: not enough memory to parse device name"); return -ENOMEM; - out_hostname: - dfprintk(MOUNT, "NFS: server hostname too long\n"); + nfs_errorf(fc, "NFS: server hostname too long"); return -ENAMETOOLONG; - out_path: - dfprintk(MOUNT, "NFS: export pathname too long\n"); + nfs_errorf(fc, "NFS: export pathname too long"); return -ENAMETOOLONG; } @@ -1015,29 +1000,23 @@ static int nfs23_parse_monolithic(struct fs_context *fc, ctx->skip_reconfig_option_check = true; return 0; } - dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: mount program didn't pass any mount data"); out_no_v3: - dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", - data->version); - return -EINVAL; + return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3"); out_no_sec: - dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS"); out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); + dfprintk(MOUNT, "NFS: not enough memory to handle mount options"); return -ENOMEM; out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); out_invalid_fh: - dfprintk(MOUNT, "NFS: invalid root filehandle\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: invalid root filehandle"); } #if IS_ENABLED(CONFIG_NFS_V4) @@ -1132,21 +1111,17 @@ static int nfs4_parse_monolithic(struct fs_context *fc, ctx->skip_reconfig_option_check = true; return 0; } - dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS4: mount program didn't pass any mount data"); out_inval_auth: - dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", - data->auth_flavourlen); - return -EINVAL; + return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d", + data->auth_flavourlen); out_no_address: - dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS4: mount program didn't pass remote address"); out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; + return nfs_invalf(fc, "NFSv4: Unsupported transport protocol udp"); } #endif @@ -1164,8 +1139,7 @@ static int nfs_fs_context_parse_monolithic(struct fs_context *fc, return nfs4_parse_monolithic(fc, data); #endif - dfprintk(MOUNT, "NFS: Unsupported monolithic data version\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unsupported monolithic data version"); } /* @@ -1253,32 +1227,25 @@ static int nfs_fs_context_validate(struct fs_context *fc) return 0; out_no_device_name: - dfprintk(MOUNT, "NFS: Device name not specified\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Device name not specified"); out_v4_not_compiled: - dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); + nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel"); return -EPROTONOSUPPORT; out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; + return nfs_invalf(fc, "NFSv4: Unsupported transport protocol udp"); out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); out_mountproto_mismatch: - dfprintk(MOUNT, "NFS: Mount server address does not match mountproto= option\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option"); out_proto_mismatch: - dfprintk(MOUNT, "NFS: Server address does not match proto= option\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Server address does not match proto= option"); out_minorversion_mismatch: - dfprintk(MOUNT, "NFS: Mount option vers=%u does not support minorversion=%u\n", + return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u", ctx->version, ctx->minorversion); - return -EINVAL; out_migration_misuse: - dfprintk(MOUNT, "NFS: 'Migration' not supported for this NFS version\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version"); out_version_unavailable: - dfprintk(MOUNT, "NFS: Version unavailable\n"); + nfs_errorf(fc, "NFS: Version unavailable"); return ret; } diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index ab45496d23a6..b012c2668a1f 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -86,6 +86,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc) error = server->nfs_client->rpc_ops->getroot(server, ctx->mntfh, &fsinfo); if (error < 0) { dprintk("nfs_get_root: getattr error = %d\n", -error); + nfs_errorf(fc, "NFS: Couldn't getattr on root"); goto out_fattr; } @@ -93,6 +94,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc) if (IS_ERR(inode)) { dprintk("nfs_get_root: get root inode failed\n"); error = PTR_ERR(inode); + nfs_errorf(fc, "NFS: Couldn't get root inode"); goto out_fattr; } @@ -108,6 +110,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc) if (IS_ERR(root)) { dprintk("nfs_get_root: get root dentry failed\n"); error = PTR_ERR(root); + nfs_errorf(fc, "NFS: Couldn't get root dentry"); goto out_fattr; } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index e0911815e153..e1f46034814f 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -141,6 +141,10 @@ struct nfs_fs_context { } clone_data; }; +#define nfs_errorf(fc, fmt, ...) errorf(fc, fmt, ## __VA_ARGS__) +#define nfs_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__) +#define nfs_warnf(fc, fmt, ...) warnf(fc, fmt, ## __VA_ARGS__) + static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) { return fc->fs_private; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 3e566a632215..c1824bc6336b 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -278,7 +278,7 @@ int nfs_do_submount(struct fs_context *fc) p = nfs_devname(dentry, buffer, 4096); if (IS_ERR(p)) { - dprintk("NFS: Couldn't determine submount pathname\n"); + nfs_errorf(fc, "NFS: Couldn't determine submount pathname"); ret = PTR_ERR(p); } else { ret = vfs_parse_fs_string(fc, "source", p, buffer + 4096 - p); diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 3b27c5e3d781..54e9c54bd08d 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -225,6 +225,7 @@ int nfs4_try_get_tree(struct fs_context *fc) fc, ctx->nfs_server.hostname, ctx->nfs_server.export_path); if (err) { + nfs_errorf(fc, "NFS4: Couldn't follow remote path"); dfprintk(MOUNT, "<-- nfs4_try_get_tree() = %d [error]\n", err); } else { dfprintk(MOUNT, "<-- nfs4_try_get_tree() = 0\n"); @@ -247,6 +248,7 @@ int nfs4_get_referral_tree(struct fs_context *fc) fc, ctx->nfs_server.hostname, ctx->nfs_server.export_path); if (err) { + nfs_errorf(fc, "NFS4: Couldn't follow remote path"); dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = %d [error]\n", err); } else { dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = 0\n"); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 60174a30a91a..2e363cc65688 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1189,7 +1189,7 @@ int nfs_get_tree_common(struct fs_context *fc) fc->s_fs_info = NULL; if (IS_ERR(s)) { error = PTR_ERR(s); - dfprintk(MOUNT, "NFS: Couldn't get superblock\n"); + nfs_errorf(fc, "NFS: Couldn't get superblock"); goto out_err_nosb; } @@ -1218,7 +1218,7 @@ int nfs_get_tree_common(struct fs_context *fc) error = nfs_get_root(s, fc); if (error < 0) { - dfprintk(MOUNT, "NFS: Couldn't get root dentry\n"); + nfs_errorf(fc, "NFS: Couldn't get root dentry"); goto error_splat_super; }