From patchwork Wed Dec 11 10:42:59 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 3324491 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5A833C0D4A for ; Wed, 11 Dec 2013 10:46:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E39EA2020F for ; Wed, 11 Dec 2013 10:46:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 67F682018B for ; Wed, 11 Dec 2013 10:46:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751803Ab3LKKqJ (ORCPT ); Wed, 11 Dec 2013 05:46:09 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:43342 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751464Ab3LKKpa (ORCPT ); Wed, 11 Dec 2013 05:45:30 -0500 Received: from hch by bombadil.infradead.org with local (Exim 4.80.1 #2 (Red Hat Linux)) id 1VqhIH-0008QT-8J; Wed, 11 Dec 2013 10:45:29 +0000 Message-Id: <20131211104529.142731540@bombadil.infradead.org> User-Agent: quilt/0.60-1 Date: Wed, 11 Dec 2013 02:42:59 -0800 From: Christoph Hellwig To: viro@zeniv.linux.org.uk Cc: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, Mark Fasheh , Joel Becker , reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, jfs-discussion@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, Andreas Gruenbacher Subject: [PATCH 16/18] gfs2: use generic posix ACL infrastructure References: <20131211104243.148113893@bombadil.infradead.org> Content-Disposition: inline; filename=0016-gfs2-use-generic-posix-ACL-infrastructure.patch X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This contains some major refactoring for the create path so that inodes are created with the right mode to start with instead of fixing it up later. Signed-off-by: Christoph Hellwig Acked-by: Steven Whitehouse --- fs/gfs2/acl.c | 234 +++++++------------------------------------------------ fs/gfs2/acl.h | 4 +- fs/gfs2/inode.c | 33 ++++++-- fs/gfs2/xattr.c | 4 +- 4 files changed, 62 insertions(+), 213 deletions(-) diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c index e82e4ac..ba94566 100644 --- a/fs/gfs2/acl.c +++ b/fs/gfs2/acl.c @@ -49,10 +49,6 @@ struct posix_acl *gfs2_get_acl(struct inode *inode, int type) if (!ip->i_eattr) return NULL; - acl = get_cached_acl(&ip->i_inode, type); - if (acl != ACL_NOT_CACHED) - return acl; - name = gfs2_acl_name(type); if (name == NULL) return ERR_PTR(-EINVAL); @@ -80,7 +76,7 @@ static int gfs2_set_mode(struct inode *inode, umode_t mode) return error; } -static int gfs2_acl_set(struct inode *inode, int type, struct posix_acl *acl) +int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) { int error; int len; @@ -88,219 +84,49 @@ static int gfs2_acl_set(struct inode *inode, int type, struct posix_acl *acl) const char *name = gfs2_acl_name(type); BUG_ON(name == NULL); - len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0); - if (len == 0) - return 0; - data = kmalloc(len, GFP_NOFS); - if (data == NULL) - return -ENOMEM; - error = posix_acl_to_xattr(&init_user_ns, acl, data, len); - if (error < 0) - goto out; - error = __gfs2_xattr_set(inode, name, data, len, 0, GFS2_EATYPE_SYS); - if (!error) - set_cached_acl(inode, type, acl); -out: - kfree(data); - return error; -} - -int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode) -{ - struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); - struct posix_acl *acl; - umode_t mode = inode->i_mode; - int error = 0; - - if (!sdp->sd_args.ar_posix_acl) - return 0; - if (S_ISLNK(inode->i_mode)) - return 0; - - acl = gfs2_get_acl(&dip->i_inode, ACL_TYPE_DEFAULT); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (!acl) { - mode &= ~current_umask(); - return gfs2_set_mode(inode, mode); - } - - if (S_ISDIR(inode->i_mode)) { - error = gfs2_acl_set(inode, ACL_TYPE_DEFAULT, acl); - if (error) - goto out; - } - - error = __posix_acl_create(&acl, GFP_NOFS, &mode); - if (error < 0) - return error; - if (error == 0) - goto munge; - - error = gfs2_acl_set(inode, ACL_TYPE_ACCESS, acl); - if (error) - goto out; -munge: - error = gfs2_set_mode(inode, mode); -out: - posix_acl_release(acl); - return error; -} - -int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr) -{ - struct inode *inode = &ip->i_inode; - struct posix_acl *acl; - char *data; - unsigned int len; - int error; - - acl = gfs2_get_acl(&ip->i_inode, ACL_TYPE_ACCESS); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (!acl) - return gfs2_setattr_simple(inode, attr); - - error = __posix_acl_chmod(&acl, GFP_NOFS, attr->ia_mode); - if (error) - return error; - - len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0); - data = kmalloc(len, GFP_NOFS); - error = -ENOMEM; - if (data == NULL) - goto out; - posix_acl_to_xattr(&init_user_ns, acl, data, len); - error = gfs2_xattr_acl_chmod(ip, attr, data); - kfree(data); - set_cached_acl(&ip->i_inode, ACL_TYPE_ACCESS, acl); - -out: - posix_acl_release(acl); - return error; -} - -static int gfs2_acl_type(const char *name) -{ - if (strcmp(name, GFS2_POSIX_ACL_ACCESS) == 0) - return ACL_TYPE_ACCESS; - if (strcmp(name, GFS2_POSIX_ACL_DEFAULT) == 0) - return ACL_TYPE_DEFAULT; - return -EINVAL; -} - -static int gfs2_xattr_system_get(struct dentry *dentry, const char *name, - void *buffer, size_t size, int xtype) -{ - struct inode *inode = dentry->d_inode; - struct gfs2_sbd *sdp = GFS2_SB(inode); - struct posix_acl *acl; - int type; - int error; - - if (!sdp->sd_args.ar_posix_acl) - return -EOPNOTSUPP; - - type = gfs2_acl_type(name); - if (type < 0) - return type; - - acl = gfs2_get_acl(inode, type); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (acl == NULL) - return -ENODATA; - - error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size); - posix_acl_release(acl); - - return error; -} - -static int gfs2_xattr_system_set(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags, - int xtype) -{ - struct inode *inode = dentry->d_inode; - struct gfs2_sbd *sdp = GFS2_SB(inode); - struct posix_acl *acl = NULL; - int error = 0, type; - - if (!sdp->sd_args.ar_posix_acl) - return -EOPNOTSUPP; - - type = gfs2_acl_type(name); - if (type < 0) - return type; - if (flags & XATTR_CREATE) - return -EINVAL; - if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode)) - return value ? -EACCES : 0; - if (!uid_eq(current_fsuid(), inode->i_uid) && !capable(CAP_FOWNER)) - return -EPERM; - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - - if (!value) - goto set_acl; - - acl = posix_acl_from_xattr(&init_user_ns, value, size); - if (!acl) { - /* - * acl_set_file(3) may request that we set default ACLs with - * zero length -- defend (gracefully) against that here. - */ - goto out; - } - if (IS_ERR(acl)) { - error = PTR_ERR(acl); - goto out; - } - - error = posix_acl_valid(acl); - if (error) - goto out_release; - - error = -EINVAL; if (acl->a_count > GFS2_ACL_MAX_ENTRIES) - goto out_release; + return -EINVAL; if (type == ACL_TYPE_ACCESS) { umode_t mode = inode->i_mode; + error = posix_acl_equiv_mode(acl, &mode); + if (error < 0) + return error; - if (error <= 0) { - posix_acl_release(acl); + if (error == 0) acl = NULL; - if (error < 0) - return error; - } - error = gfs2_set_mode(inode, mode); if (error) - goto out_release; + return error; } -set_acl: - error = __gfs2_xattr_set(inode, name, value, size, 0, GFS2_EATYPE_SYS); - if (!error) { - if (acl) - set_cached_acl(inode, type, acl); - else - forget_cached_acl(inode, type); + if (acl) { + len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0); + if (len == 0) + return 0; + data = kmalloc(len, GFP_NOFS); + if (data == NULL) + return -ENOMEM; + error = posix_acl_to_xattr(&init_user_ns, acl, data, len); + if (error < 0) + goto out; + } else { + data = NULL; + len = 0; } -out_release: - posix_acl_release(acl); + + error = __gfs2_xattr_set(inode, name, data, len, 0, GFS2_EATYPE_SYS); + if (error) + goto out; + + if (acl) + set_cached_acl(inode, type, acl); + else + forget_cached_acl(inode, type); out: + kfree(data); return error; } - -const struct xattr_handler gfs2_xattr_system_handler = { - .prefix = XATTR_SYSTEM_PREFIX, - .flags = GFS2_EATYPE_SYS, - .get = gfs2_xattr_system_get, - .set = gfs2_xattr_system_set, -}; - diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h index 0da38dc..301260c 100644 --- a/fs/gfs2/acl.h +++ b/fs/gfs2/acl.h @@ -17,8 +17,6 @@ #define GFS2_ACL_MAX_ENTRIES 25 extern struct posix_acl *gfs2_get_acl(struct inode *inode, int type); -extern int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode); -extern int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr); -extern const struct xattr_handler gfs2_xattr_system_handler; +extern int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type); #endif /* __ACL_DOT_H__ */ diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 7119504..92b8959 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -552,6 +552,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, unsigned int size, int excl, int *opened) { const struct qstr *name = &dentry->d_name; + struct posix_acl *default_acl, *acl; struct gfs2_holder ghs[2]; struct inode *inode = NULL; struct gfs2_inode *dip = GFS2_I(dir), *ip; @@ -611,10 +612,14 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, if (!inode) goto fail_gunlock; + error = posix_acl_create(dir, &mode, &default_acl, &acl); + if (error) + goto fail_free_vfs_inode; + ip = GFS2_I(inode); error = gfs2_rs_alloc(ip); if (error) - goto fail_free_inode; + goto fail_free_acls; inode->i_mode = mode; set_nlink(inode, S_ISDIR(mode) ? 2 : 1); @@ -682,7 +687,16 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, gfs2_set_iop(inode); insert_inode_hash(inode); - error = gfs2_acl_create(dip, inode); + if (default_acl) { + error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); + posix_acl_release(default_acl); + } + if (acl) { + if (!error) + error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); + posix_acl_release(acl); + } + if (error) goto fail_gunlock3; @@ -716,6 +730,12 @@ fail_free_inode: if (ip->i_gl) gfs2_glock_put(ip->i_gl); gfs2_rs_delete(ip, NULL); +fail_free_acls: + if (default_acl) + posix_acl_release(default_acl); + if (acl) + posix_acl_release(acl); +fail_free_vfs_inode: free_inode_nonrcu(inode); inode = NULL; fail_gunlock: @@ -1678,10 +1698,11 @@ static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) error = gfs2_setattr_size(inode, attr->ia_size); else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) error = setattr_chown(inode, attr); - else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) - error = gfs2_acl_chmod(ip, attr); - else + else { error = gfs2_setattr_simple(inode, attr); + if (!error && attr->ia_valid & ATTR_MODE) + error = posix_acl_chmod(inode, inode->i_mode); + } out: if (!error) @@ -1841,6 +1862,7 @@ const struct inode_operations gfs2_file_iops = { .removexattr = gfs2_removexattr, .fiemap = gfs2_fiemap, .get_acl = gfs2_get_acl, + .set_acl = gfs2_set_acl, }; const struct inode_operations gfs2_dir_iops = { @@ -1862,6 +1884,7 @@ const struct inode_operations gfs2_dir_iops = { .removexattr = gfs2_removexattr, .fiemap = gfs2_fiemap, .get_acl = gfs2_get_acl, + .set_acl = gfs2_set_acl, .atomic_open = gfs2_atomic_open, }; diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c index 8c6a6f6..0b81f78 100644 --- a/fs/gfs2/xattr.c +++ b/fs/gfs2/xattr.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include "gfs2.h" @@ -1500,7 +1501,8 @@ static const struct xattr_handler gfs2_xattr_security_handler = { const struct xattr_handler *gfs2_xattr_handlers[] = { &gfs2_xattr_user_handler, &gfs2_xattr_security_handler, - &gfs2_xattr_system_handler, + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, NULL, };