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Commit e5003b2f authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4.x: Fix NFS4ERR_RETRY_UNCACHED_REP in nfs4_callback_sequence 



We need to initialize cb_sequenceres information when reporting a
NFS4ERR_RETRY_UNCACHED_REP error, since that will apply to the
next operation, not to the CB_SEQUENCE itself.

Reported-by: default avatarKinglong Mee <kinglongmee@gmail.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 810d82e6

fs/nfs/callback_proc.c

+10 −7
Original line number Diff line number Diff line
@@ -464,6 +464,12 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 
	tbl = &clp->cl_session->bc_slot_table;

	slot = tbl->slots + args->csa_slotid;



	/* Set up res before grabbing the spinlock */

	memcpy(&res->csr_sessionid, &args->csa_sessionid,

	       sizeof(res->csr_sessionid));

	res->csr_sequenceid = args->csa_sequenceid;

	res->csr_slotid = args->csa_slotid;



	spin_lock(&tbl->slot_tbl_lock);

	/* state manager is resetting the session */

	if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
@@ -480,6 +486,10 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 
	slot = nfs4_lookup_slot(tbl, args->csa_slotid);

	if (IS_ERR(slot))

		goto out_unlock;



	res->csr_highestslotid = tbl->server_highest_slotid;

	res->csr_target_highestslotid = tbl->target_highest_slotid;



	status = validate_seqid(tbl, slot, args);

	if (status)

		goto out_unlock;
@@ -489,13 +499,6 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 
	}

	cps->slot = slot;



	memcpy(&res->csr_sessionid, &args->csa_sessionid,

	       sizeof(res->csr_sessionid));

	res->csr_sequenceid = args->csa_sequenceid;

	res->csr_slotid = args->csa_slotid;

	res->csr_highestslotid = tbl->server_highest_slotid;

	res->csr_target_highestslotid = tbl->target_highest_slotid;



	/* The ca_maxresponsesize_cached is 0 with no DRC */

	if (args->csa_cachethis != 0)

		return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE);