tree 550a45aa879cc0e4783a9dba909411b79f4025fb
parent 4b96edea5cd1b77bef855a51ecabfb3579f8b7bc
author Trond Myklebust <trond.myklebust@hammerspace.com> 1627045040 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1631965213 +0200

NFSv4/pNFS: Always allow update of a zero valued layout barrier

[ Upstream commit 45baadaad7bf9183651fb74f4ed1200da48505a5 ]

A zero value for the layout barrier indicates that it has been cleared
(since seqid '0' is an illegal value), so we should always allow it to
be updated.

Fixes: d29b468da4f9 ("pNFS/NFSv4: Improve rejection of out-of-order layouts")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>