From 4e54ab8d8c744f977ba13404342aeb260e353330 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 11 Jun 2015 21:13:58 -0400 Subject: [PATCH] NFS: Ensure that we update the sequence id under the slot table lock Fix a callback slot table regression. Fixes: e937ee714b2d ("nfs: Only update callback sequnce id when CB_SEQUENCE success") Cc: Kinglong Mee Signed-off-by: Trond Myklebust --- fs/nfs/callback_proc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 17a5c571a006..29e3c1b011b7 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -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 */ -- 2.20.1