xfs: make pNFS LAYOUTCOMMIT stable the way fdatasync does

Every LAYOUTCOMMIT commits a synchronous transaction and forces the
log. fdatasync after the same overwrite does not, because timestamps
alone do not set ili_datasync_seq.

Do what fdatasync does. Commit without XFS_TRANS_SYNC, force the log up
to ili_datasync_seq, and flush the data device cache if that wrote no
iclog. Conversions and size changes still force the log. As with
fdatasync, a crash before the next log write can lose the new
timestamps and the change attribute that nfsd derives from the ctime.

Signed-off-by: Daejun Park <daejun7.park@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

0 files changed, 0 insertions, 0 deletions