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authorTrond Myklebust <trond.myklebust@primarydata.com>2016-09-11 14:50:01 -0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-09-11 14:56:44 -0400
commitb519d408ea32040b1c7e10b155a3ee9a36660947 (patch)
tree9049e716fbaa9e06cf0cee5704cf2e3d5f5e68a2
parent05c974669ecec510a85d8534099bb75404e82c41 (diff)
downloadlinux-stericsson-b519d408ea32040b1c7e10b155a3ee9a36660947.tar.gz
NFSv4.1: Fix the CREATE_SESSION slot number accounting
Ensure that we conform to the algorithm described in RFC5661, section 18.36.4 for when to bump the sequence id. In essence we do it for all cases except when the RPC call timed out, or in case of the server returning NFS4ERR_DELAY or NFS4ERR_STALE_CLIENTID. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Cc: stable@vger.kernel.org
-rw-r--r--fs/nfs/nfs4proc.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c380d2ee4137..a9dec32ba9ba 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7570,12 +7570,20 @@ static int _nfs4_proc_create_session(struct nfs_client *clp,
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
trace_nfs4_create_session(clp, status);
+ switch (status) {
+ case -NFS4ERR_STALE_CLIENTID:
+ case -NFS4ERR_DELAY:
+ case -ETIMEDOUT:
+ case -EACCES:
+ case -EAGAIN:
+ goto out;
+ };
+
+ clp->cl_seqid++;
if (!status) {
/* Verify the session's negotiated channel_attrs values */
status = nfs4_verify_channel_attrs(&args, &res);
/* Increment the clientid slot sequence id */
- if (clp->cl_seqid == res.seqid)
- clp->cl_seqid++;
if (status)
goto out;
nfs4_update_session(session, &res);