From patchwork Mon May 30 08:57:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 9140557 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 77AA760757 for ; Mon, 30 May 2016 08:58:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6929627F17 for ; Mon, 30 May 2016 08:58:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5D9D127BEF; Mon, 30 May 2016 08:58:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DDCFE27BEF for ; Mon, 30 May 2016 08:58:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933111AbcE3I6J (ORCPT ); Mon, 30 May 2016 04:58:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46061 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932360AbcE3I6G (ORCPT ); Mon, 30 May 2016 04:58:06 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 33FFF70AA1; Mon, 30 May 2016 08:58:06 +0000 (UTC) Received: from nux.redhat.com (vpn1-6-85.ams2.redhat.com [10.36.6.85]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u4U8vYAg026102; Mon, 30 May 2016 04:57:59 -0400 From: Andreas Gruenbacher To: Alexander Viro Cc: Andreas Gruenbacher , linux-fsdevel@vger.kernel.org, Tyler Hicks , ecryptfs@vger.kernel.org, Miklos Szeredi , linux-unionfs@vger.kernel.org, Mimi Zohar , linux-ima-devel@lists.sourceforge.net, linux-security-module@vger.kernel.org, David Howells , Serge Hallyn , Dmitry Kasatkin , Paul Moore , Stephen Smalley , Eric Paris , Casey Schaufler , Oleg Drokin , Andreas Dilger Subject: [PATCH v3 03/17] hfs: Switch to generic xattr handlers Date: Mon, 30 May 2016 10:57:19 +0200 Message-Id: <1464598653-3656-4-git-send-email-agruenba@redhat.com> In-Reply-To: <1464598653-3656-1-git-send-email-agruenba@redhat.com> References: <1464598653-3656-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Mon, 30 May 2016 08:58:06 +0000 (UTC) Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Andreas Gruenbacher --- fs/hfs/attr.c | 83 +++++++++++++++++++++++++++++++++++++++------------------ fs/hfs/hfs_fs.h | 6 +---- fs/hfs/inode.c | 7 ++--- fs/hfs/super.c | 1 + 4 files changed, 63 insertions(+), 34 deletions(-) diff --git a/fs/hfs/attr.c b/fs/hfs/attr.c index d9a8691..b13b982 100644 --- a/fs/hfs/attr.c +++ b/fs/hfs/attr.c @@ -13,9 +13,13 @@ #include "hfs_fs.h" #include "btree.h" -int hfs_setxattr(struct dentry *unused, struct inode *inode, - const char *name, const void *value, - size_t size, int flags) +enum hfs_xattr_type { + HFS_TYPE, + HFS_CREATOR, +}; + +static int __hfs_setxattr(struct inode *inode, enum hfs_xattr_type type, + const void *value, size_t size, int flags) { struct hfs_find_data fd; hfs_cat_rec rec; @@ -36,18 +40,22 @@ int hfs_setxattr(struct dentry *unused, struct inode *inode, sizeof(struct hfs_cat_file)); file = &rec.file; - if (!strcmp(name, "hfs.type")) { + switch(type) { + case HFS_TYPE: if (size == 4) memcpy(&file->UsrWds.fdType, value, 4); else res = -ERANGE; - } else if (!strcmp(name, "hfs.creator")) { + break; + + case HFS_CREATOR: if (size == 4) memcpy(&file->UsrWds.fdCreator, value, 4); else res = -ERANGE; - } else - res = -EOPNOTSUPP; + break; + } + if (!res) hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); @@ -56,8 +64,8 @@ out: return res; } -ssize_t hfs_getxattr(struct dentry *unused, struct inode *inode, - const char *name, void *value, size_t size) +static ssize_t __hfs_getxattr(struct inode *inode, enum hfs_xattr_type type, + void *value, size_t size) { struct hfs_find_data fd; hfs_cat_rec rec; @@ -80,41 +88,64 @@ ssize_t hfs_getxattr(struct dentry *unused, struct inode *inode, } file = &rec.file; - if (!strcmp(name, "hfs.type")) { + switch(type) { + case HFS_TYPE: if (size >= 4) { memcpy(value, &file->UsrWds.fdType, 4); res = 4; } else res = size ? -ERANGE : 4; - } else if (!strcmp(name, "hfs.creator")) { + break; + + case HFS_CREATOR: if (size >= 4) { memcpy(value, &file->UsrWds.fdCreator, 4); res = 4; } else res = size ? -ERANGE : 4; - } else - res = -ENODATA; + break; + } + out: if (size) hfs_find_exit(&fd); return res; } -#define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type")) - -ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size) +static int hfs_xattr_get(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *name, void *value, size_t size) { - struct inode *inode = d_inode(dentry); + return __hfs_getxattr(inode, handler->flags, value, size); +} - if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) +static int hfs_xattr_set(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *name, const void *value, size_t size, + int flags) +{ + if (!value) return -EOPNOTSUPP; - if (!buffer || !size) - return HFS_ATTRLIST_SIZE; - if (size < HFS_ATTRLIST_SIZE) - return -ERANGE; - strcpy(buffer, "hfs.type"); - strcpy(buffer + sizeof("hfs.type"), "hfs.creator"); - - return HFS_ATTRLIST_SIZE; + return __hfs_setxattr(inode, handler->flags, value, size, flags); } + +static const struct xattr_handler hfs_creator_handler = { + .name = "hfs.creator", + .flags = HFS_CREATOR, + .get = hfs_xattr_get, + .set = hfs_xattr_set, +}; + +static const struct xattr_handler hfs_type_handler = { + .name = "hfs.type", + .flags = HFS_TYPE, + .get = hfs_xattr_get, + .set = hfs_xattr_set, +}; + +const struct xattr_handler *hfs_xattr_handlers[] = { + &hfs_creator_handler, + &hfs_type_handler, + NULL +}; diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h index ee2f385..c4691e8 100644 --- a/fs/hfs/hfs_fs.h +++ b/fs/hfs/hfs_fs.h @@ -212,11 +212,7 @@ extern void hfs_evict_inode(struct inode *); extern void hfs_delete_inode(struct inode *); /* attr.c */ -extern int hfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name, - const void *value, size_t size, int flags); -extern ssize_t hfs_getxattr(struct dentry *dentry, struct inode *inode, - const char *name, void *value, size_t size); -extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size); +extern const struct xattr_handler *hfs_xattr_handlers[]; /* mdb.c */ extern int hfs_mdb_get(struct super_block *); diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c index 8eed66a..d7f833f 100644 --- a/fs/hfs/inode.c +++ b/fs/hfs/inode.c @@ -15,6 +15,7 @@ #include #include #include +#include #include "hfs_fs.h" #include "btree.h" @@ -687,7 +688,7 @@ static const struct file_operations hfs_file_operations = { static const struct inode_operations hfs_file_inode_operations = { .lookup = hfs_file_lookup, .setattr = hfs_inode_setattr, - .setxattr = hfs_setxattr, - .getxattr = hfs_getxattr, - .listxattr = hfs_listxattr, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = generic_listxattr, }; diff --git a/fs/hfs/super.c b/fs/hfs/super.c index 1ca95c2..bf6304a 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -406,6 +406,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent) } sb->s_op = &hfs_super_operations; + sb->s_xattr = hfs_xattr_handlers; sb->s_flags |= MS_NODIRATIME; mutex_init(&sbi->bitmap_lock);