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xfs: S_DAX is only for regular files

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Only regular files can use DAX for data operations, so we should
restrict setting it on the VFS inode to regular files. Setting it on
metadata inodes may cause the VFS to do the wrong thing for such
inodes, so avoid potential problems by restricting the scope of the
flag to what we know is supported.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner 2016-03-01 09:41:33 +11:00 committed by Dave Chinner
parent e889752905
commit db10c697b4
1 changed files with 3 additions and 2 deletions
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5
fs/xfs/xfs_iops.c
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@ -1205,8 +1205,9 @@ xfs_diflags_to_iflags(
inode->i_flags |= S_SYNC;
if (flags & XFS_DIFLAG_NOATIME)
inode->i_flags |= S_NOATIME;
if (ip->i_mount->m_flags & XFS_MOUNT_DAX ||
ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
if (S_ISREG(inode->i_mode) &&
(ip->i_mount->m_flags & XFS_MOUNT_DAX ||
ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
inode->i_flags |= S_DAX;
}