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NFSv4.x: CB_SEQUENCE should return NFS4ERR_DELAY if still executing 

See RFC5661 Section 2.10.6.2: if retrying a request, and the old one is
still in progress, we must return NFS4ERR_DELAY as the reply to sequence.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-01-23 17:15:37 -05:00
parent f4f58ed19b
commit f74a834a0e
1 changed files with 2 additions and 0 deletions
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2
fs/nfs/callback_proc.c
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@ -375,6 +375,8 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
if (args->csa_sequenceid == slot->seq_nr) {
dprintk("%s seqid %u is a replay\n",
__func__, args->csa_sequenceid);
if (tbl->highest_used_slotid != NFS4_NO_SLOT)
return htonl(NFS4ERR_DELAY);
/* Signal process_op to set this error on next op */
if (args->csa_cachethis == 0)
return htonl(NFS4ERR_RETRY_UNCACHED_REP);