Recently I posted a patch to turn on the i_version counter unconditionally

in

ext4, and Lukas rightly pointed out that we don't currently have an easy

way to

validate its functionality. You can fetch it via NFS (and see it in

network traces),

but there's no way to get to it from userland.

Besides testing, this may also be of use for userland NFS servers, or by

any

program that wants to accurately check for file changes, and not be

subject to

mtime granularity problems.

This would definitely be useful for NFS Ganesha.

Thanks

Frank

Comments and suggestions welcome. I'm not 100% convinced that this is a
great idea, but we've had people ask for it before and it seems like a

reasonable

thing to provide.

Jeff Layton (4):
  vfs: report change attribute in statx for IS_I_VERSION inodes
  nfs: report the change attribute if requested
  afs: fill out change attribute in statx replies
  ceph: fill in the change attribute in statx requests

 fs/afs/inode.c            |  2 ++
 fs/ceph/inode.c           | 14 +++++++++-----
 fs/nfs/inode.c            |  3 +++
 fs/stat.c                 |  7 +++++++
 include/linux/stat.h      |  1 +
 include/uapi/linux/stat.h |  3 ++-
 samples/vfs/test-statx.c  |  4 +++-
 7 files changed, 27 insertions(+), 7 deletions(-)

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2.37.1