Commit f40afeeb authored by Trond Myklebust's avatar Trond Myklebust Committed by Sasha Levin

NFSv4.1: Fix the CREATE_SESSION slot number accounting

[ Upstream commit b519d408 ]

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: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 41beb77f
......@@ -7281,12 +7281,20 @@ 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);
......
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