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authorTrond Myklebust <trond.myklebust@hammerspace.com>2021-07-23 08:57:20 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2021-08-09 16:57:04 -0400
commit45baadaad7bf9183651fb74f4ed1200da48505a5 (patch)
tree71c2ff01ba8acafe92f979e672faae5d29832895 /fs/nfs
parent7c0bbf2d3dcd13c906244e0c2e4a0ba3a33dab6a (diff)
NFSv4/pNFS: Always allow update of a zero valued layout barrier
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>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/pnfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 856706180d33..7775f6b5a53a 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -335,7 +335,7 @@ static bool pnfs_seqid_is_newer(u32 s1, u32 s2)
static void pnfs_barrier_update(struct pnfs_layout_hdr *lo, u32 newseq)
{
- if (pnfs_seqid_is_newer(newseq, lo->plh_barrier))
+ if (pnfs_seqid_is_newer(newseq, lo->plh_barrier) || !lo->plh_barrier)
lo->plh_barrier = newseq;
}