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authorCarlos Maiolino <cmaiolino@redhat.com>2013-06-21 14:45:53 -0300
committerBen Myers <bpm@sgi.com>2013-07-10 10:21:51 -0500
commit42c49d7f249c2487f36d3314753d5d8ebcee8249 (patch)
tree6c0863677aa03d43d5a5c3e8cb5a53c4b1653b08 /fs/xfs
parentb0a9dab78aee2a479d7c226e6939d553967e4024 (diff)
downloadlinux-42c49d7f249c2487f36d3314753d5d8ebcee8249.tar.bz2
xfs: fix sgid inheritance for subdirectories inheriting default acls [V3]
XFS removes sgid bits of subdirectories under a directory containing a default acl. When a default acl is set, it implies xfs to call xfs_setattr_nonsize() in its code path. Such function is shared among mkdir and chmod system calls, and does some checks unneeded by mkdir (calling inode_change_ok()). Such checks remove sgid bit from the inode after it has been granted. With this patch, we extend the meaning of XFS_ATTR_NOACL flag to avoid these checks when acls are being inherited (thanks hch). Also, xfs_setattr_mode, doesn't need to re-check for group id and capabilities permissions, this only implies in another try to remove sgid bit from the directories. Such check is already done either on inode_change_ok() or xfs_setattr_nonsize(). Changelog: V2: Extends the meaning of XFS_ATTR_NOACL instead of wrap the tests into another function V3: Remove S_ISDIR check in xfs_setattr_nonsize() from the patch Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Ben Myers <bpm@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_iops.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index c69bbc493cb0..8865261e5417 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -467,9 +467,6 @@ xfs_setattr_mode(
ASSERT(tp);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
- mode &= ~S_ISGID;
-
ip->i_d.di_mode &= S_IFMT;
ip->i_d.di_mode |= mode & ~S_IFMT;
@@ -495,15 +492,18 @@ xfs_setattr_nonsize(
trace_xfs_setattr(ip);
- if (mp->m_flags & XFS_MOUNT_RDONLY)
- return XFS_ERROR(EROFS);
+ /* If acls are being inherited, we already have this checked */
+ if (!(flags & XFS_ATTR_NOACL)) {
+ if (mp->m_flags & XFS_MOUNT_RDONLY)
+ return XFS_ERROR(EROFS);
- if (XFS_FORCED_SHUTDOWN(mp))
- return XFS_ERROR(EIO);
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
- error = -inode_change_ok(inode, iattr);
- if (error)
- return XFS_ERROR(error);
+ error = -inode_change_ok(inode, iattr);
+ if (error)
+ return XFS_ERROR(error);
+ }
ASSERT((mask & ATTR_SIZE) == 0);