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Commit 4e54ab8d authored by Trond Myklebust's avatar Trond Myklebust
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NFS: Ensure that we update the sequence id under the slot table lock



Fix a callback slot table regression.

Fixes: e937ee71 ("nfs: Only update callback sequnce id when CB_SEQUENCE success")
Cc: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 0579c8d2
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+5 −5
Original line number Diff line number Diff line
@@ -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 */