Xuan Qi reports that the Linux NFSv4 client failed to lock a file
that was migrated. The steps he observed on the wire:
1. The client sent a LOCK request
2. The server replied NFS4ERR_MOVED
3. The client switched to the destination server
4. The client sent the LOCK request again with a bumped
lock sequence ID
5. The server rejected the LOCK request with NFS4ERR_BAD_SEQID
RFC 3530 section 8.1.5 provides a list of NFS errors which do not
bump a lock sequence ID.
However, RFC 3530 is now obsoleted by RFC 7530. In RFC 7530 section
9.1.7, this list has been updated by the addition of NFS4ERR_MOVED.
Reported-by: Xuan Qi <xuan.qi@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v3.7+
---
include/linux/nfs4.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index bca5363..1b1ca04 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -282,7 +282,7 @@ enum nfsstat4 {
static inline bool seqid_mutating_err(u32 err)
{
- /* rfc 3530 section 8.1.5: */
+ /* See RFC 7530, section 9.1.7 */
switch (err) {
case NFS4ERR_STALE_CLIENTID:
case NFS4ERR_STALE_STATEID:
@@ -291,6 +291,7 @@ static inline bool seqid_mutating_err(u32 err)
case NFS4ERR_BADXDR:
case NFS4ERR_RESOURCE:
case NFS4ERR_NOFILEHANDLE:
+ case NFS4ERR_MOVED:
return false;
};
return true;
--
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