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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-04-20 16:12:55 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-04-20 22:56:30 -0700 |
| commit | 241c39b9ac4bf847013aa06cce6d4d61426a2006 (patch) | |
| tree | 6455884e65288e64576555a27c06a8ee2f1f6371 | |
| parent | 2b82f190c81bf1524447c021df4e9ce8ef379bd5 (diff) | |
| download | linux-241c39b9ac4bf847013aa06cce6d4d61426a2006.tar.gz | |
RPC: Fix the TCP resend semantics for NFSv4
Fix a regression due to the patch "NFS: disconnect before retrying NFSv4 requests over TCP" The assumption made in xprt_transmit() that the condition "req->rq_bytes_sent == 0 and request is on the receive list" should imply that we're dealing with a retransmission is false. Firstly, it may simply happen that the socket send queue was full at the time the request was initially sent through xprt_transmit(). Secondly, doing this for each request that was retransmitted implies that we disconnect and reconnect for _every_ request that happened to be retransmitted irrespective of whether or not a disconnection has already occurred. Fix is to move this logic into the call_status request timeout handler. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | net/sunrpc/clnt.c | 4 | ||||
| -rw-r--r-- | net/sunrpc/xprt.c | 10 |
2 files changed, 4 insertions, 10 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 6d7221fe990a..396cdbe249d1 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1046,6 +1046,8 @@ call_status(struct rpc_task *task) rpc_delay(task, 3*HZ); case -ETIMEDOUT: task->tk_action = call_timeout; + if (task->tk_client->cl_discrtry) + xprt_disconnect(task->tk_xprt); break; case -ECONNREFUSED: case -ENOTCONN: @@ -1169,6 +1171,8 @@ call_decode(struct rpc_task *task) out_retry: req->rq_received = req->rq_private_buf.len = 0; task->tk_status = 0; + if (task->tk_client->cl_discrtry) + xprt_disconnect(task->tk_xprt); } /* diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index ee6ffa01dfb1..456a14510308 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -735,16 +735,6 @@ void xprt_transmit(struct rpc_task *task) xprt_reset_majortimeo(req); /* Turn off autodisconnect */ del_singleshot_timer_sync(&xprt->timer); - } else { - /* If all request bytes have been sent, - * then we must be retransmitting this one */ - if (!req->rq_bytes_sent) { - if (task->tk_client->cl_discrtry) { - xprt_disconnect(xprt); - task->tk_status = -ENOTCONN; - return; - } - } } } else if (!req->rq_bytes_sent) return; |