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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-04-20 16:12:55 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-04-20 22:56:30 -0700
commit241c39b9ac4bf847013aa06cce6d4d61426a2006 (patch)
tree6455884e65288e64576555a27c06a8ee2f1f6371
parent2b82f190c81bf1524447c021df4e9ce8ef379bd5 (diff)
downloadop-kernel-dev-241c39b9ac4bf847013aa06cce6d4d61426a2006.zip
op-kernel-dev-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.c4
-rw-r--r--net/sunrpc/xprt.c10
2 files changed, 4 insertions, 10 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 6d7221f..396cdbe 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 ee6ffa0..456a145 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;
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