On Tue, Nov 18, 2014 at 12:02:10PM -0500, J. Bruce Fields wrote:
> On Thu, Nov 06, 2014 at 11:26:37PM -0800, Christoph Hellwig wrote:
> > Note that for filesystems natively implementing the change attribute
> > (btrfs, XFSv5 and ext4 with a mount option) there is no difference anyway,
>
> Is there something special I have to do to get this on xfs?
You need to create a version 5 filesystem. For this your need fairly
recent xfsprogs (e.g. RHEL7ish), and create the filesystem using
# mkfs.xf -m crc=1 /dev/device
You probably also want the untested patch below to proper initialize
the version on inodes read from disk:
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index ec6dcdc..c1e2700 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1277,6 +1277,9 @@ xfs_setup_inode(
inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
xfs_diflags_to_iflags(inode, ip);
+ if (xfs_sb_version_hascrc(&ip->i_mount->m_sb))
+ inode->i_version = ip->i_d.di_changecount;
+
ip->d_ops = ip->i_mount->m_nondir_inode_ops;
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
switch (inode->i_mode & S_IFMT) {
--
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