diff options
| author |   NeilBrown <neilb@suse.com> | 2019-05-30 10:41:28 +1000 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-07-06 14:54:50 -0400 |
| commit | 5a0c257f8e0f4c4b3c33dff545317c21a921303e (patch) | |
| tree | a1b50f2ffd25d25819faaea8045e814edec64324 /net/sunrpc | |
| parent | NFS: Allow multiple connections to a NFSv2 or NFSv3 server (diff) | |
| download | linux-dev-5a0c257f8e0f4c4b3c33dff545317c21a921303e.tar.xz linux-dev-5a0c257f8e0f4c4b3c33dff545317c21a921303e.zip | |
NFS: send state management on a single connection.
With NFSv4.1, different network connections need to be explicitly
bound to a session. During session startup, this is not possible
so only a single connection must be used for session startup.
So add a task flag to disable the default round-robin choice of
connections (when nconnect > 1) and force the use of a single
connection.
Then use that flag on all requests for session management - for
consistence, include NFSv4.0 management (SETCLIENTID) and session
destruction
Reported-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/clnt.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index b6aca8cb5ae6..d599fab8adcb 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -995,6 +995,24 @@ rpc_task_get_xprt(struct rpc_clnt *clnt) return xprt; } +static struct rpc_xprt * +rpc_task_get_first_xprt(struct rpc_clnt *clnt) +{ + struct rpc_xprt_switch *xps; + struct rpc_xprt *xprt; + + rcu_read_lock(); + xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); + if (xprt) { + atomic_long_inc(&xprt->queuelen); + xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); + atomic_long_inc(&xps->xps_queuelen); + } + rcu_read_unlock(); + + return xprt; +} + static void rpc_task_release_xprt(struct rpc_clnt *clnt, struct rpc_xprt *xprt) { @@ -1042,7 +1060,11 @@ void rpc_task_release_client(struct rpc_task *task) static void rpc_task_set_transport(struct rpc_task *task, struct rpc_clnt *clnt) { - if (!task->tk_xprt) + if (task->tk_xprt) + return; + if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) + task->tk_xprt = rpc_task_get_first_xprt(clnt); + else task->tk_xprt = rpc_task_get_xprt(clnt); } |