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NFS: Ensure that we update the sequence id under the slot table lock 

Fix a callback slot table regression.

Fixes: e937ee714b ("nfs: Only update callback sequnce id when CB_SEQUENCE success")
Cc: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-06-11 21:13:58 -04:00
parent 0579c8d208
commit 4e54ab8d8c
1 changed files with 5 additions and 5 deletions
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10
fs/nfs/callback_proc.c
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@ -435,14 +435,13 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
spin_lock(&tbl->slot_tbl_lock);
/* state manager is resetting the session */
if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
spin_unlock(&tbl->slot_tbl_lock);
status = htonl(NFS4ERR_DELAY);
/* Return NFS4ERR_BADSESSION if we're draining the session
* in order to reset it.
*/
if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
status = htonl(NFS4ERR_BADSESSION);
goto out;
goto out_unlock;
}
memcpy(&res->csr_sessionid, &args->csa_sessionid,
@ -453,9 +452,8 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
status = validate_seqid(tbl, args);
spin_unlock(&tbl->slot_tbl_lock);
if (status)
goto out;
goto out_unlock;
cps->slotid = args->csa_slotid;
@ -466,7 +464,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
*/
if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) {
status = htonl(NFS4ERR_DELAY);
goto out;
goto out_unlock;
}
/*
@ -475,6 +473,8 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
* (sequence ID, cached reply) MUST NOT change.
*/
slot->seq_nr++;
out_unlock:
spin_unlock(&tbl->slot_tbl_lock);
out:
cps->clp = clp; /* put in nfs4_callback_compound */