If we get an ECONNREFUSED error, we currently go to sleep on the
'xprt->sending' wait queue. The problem is that no timeout is set there,
and there is nothing else that will wake the task up later.
We should deal with ECONNREFUSED in call_status, given that is where we
also deal with -EHOSTDOWN, and friends.
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
---
net/sunrpc/clnt.c | 7 ++++++-
net/sunrpc/xprt.c | 38 ++++++++++++++++----------------------
net/sunrpc/xprtsock.c | 26 ++++++++++++--------------
3 files changed, 34 insertions(+), 37 deletions(-)
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 07e9b05..145715b 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1117,10 +1117,12 @@ call_transmit_status(struct rpc_task *task)
* then hold onto the transport lock.
*/
case -ECONNREFUSED:
+ case -ECONNRESET:
case -ENOTCONN:
case -EHOSTDOWN:
case -EHOSTUNREACH:
case -ENETUNREACH:
+ case -EPIPE:
rpc_task_force_reencode(task);
}
}
@@ -1162,9 +1164,12 @@ call_status(struct rpc_task *task)
xprt_conditional_disconnect(task->tk_xprt,
req->rq_connect_cookie);
break;
+ case -ECONNRESET:
case -ECONNREFUSED:
- case -ENOTCONN:
rpc_force_rebind(clnt);
+ rpc_delay(task, 3*HZ);
+ case -EPIPE:
+ case -ENOTCONN:
task->tk_action = call_bind;
break;
case -EAGAIN:
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index d1afec6..d588e75 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -901,32 +901,26 @@ void xprt_transmit(struct rpc_task *task)
req->rq_connect_cookie = xprt->connect_cookie;
req->rq_xtime = jiffies;
status = xprt->ops->send_request(task);
- if (status == 0) {
- dprintk("RPC: %5u xmit complete\n", task->tk_pid);
- spin_lock_bh(&xprt->transport_lock);
+ if (status != 0) {
+ task->tk_status = status;
+ return;
+ }
- xprt->ops->set_retrans_timeout(task);
+ dprintk("RPC: %5u xmit complete\n", task->tk_pid);
+ spin_lock_bh(&xprt->transport_lock);
- xprt->stat.sends++;
- xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs;
- xprt->stat.bklog_u += xprt->backlog.qlen;
+ xprt->ops->set_retrans_timeout(task);
- /* Don't race with disconnect */
- if (!xprt_connected(xprt))
- task->tk_status = -ENOTCONN;
- else if (!req->rq_received)
- rpc_sleep_on(&xprt->pending, task, xprt_timer);
- spin_unlock_bh(&xprt->transport_lock);
- return;
- }
+ xprt->stat.sends++;
+ xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs;
+ xprt->stat.bklog_u += xprt->backlog.qlen;
- /* Note: at this point, task->tk_sleeping has not yet been set,
- * hence there is no danger of the waking up task being put on
- * schedq, and being picked up by a parallel run of rpciod().
- */
- task->tk_status = status;
- if (status == -ECONNREFUSED)
- rpc_sleep_on(&xprt->sending, task, NULL);
+ /* Don't race with disconnect */
+ if (!xprt_connected(xprt))
+ task->tk_status = -ENOTCONN;
+ else if (!req->rq_received)
+ rpc_sleep_on(&xprt->pending, task, xprt_timer);
+ spin_unlock_bh(&xprt->transport_lock);
}
static inline void do_xprt_reserve(struct rpc_task *task)
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 9d1898f..5e8198b 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -594,6 +594,8 @@ static int xs_udp_send_request(struct rpc_task *task)
/* Still some bytes left; set up for a retry later. */
status = -EAGAIN;
}
+ if (!transport->sock)
+ goto out;
switch (status) {
case -ENOTSOCK:
@@ -603,19 +605,17 @@ static int xs_udp_send_request(struct rpc_task *task)
case -EAGAIN:
xs_nospace(task);
break;
+ default:
+ dprintk("RPC: sendmsg returned unrecognized error %d\n",
+ -status);
case -ENETUNREACH:
case -EPIPE:
case -ECONNREFUSED:
/* When the server has died, an ICMP port unreachable message
* prompts ECONNREFUSED. */
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
- break;
- default:
- clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
- dprintk("RPC: sendmsg returned unrecognized error %d\n",
- -status);
}
-
+out:
return status;
}
@@ -697,6 +697,8 @@ static int xs_tcp_send_request(struct rpc_task *task)
status = -EAGAIN;
break;
}
+ if (!transport->sock)
+ goto out;
switch (status) {
case -ENOTSOCK:
@@ -706,21 +708,17 @@ static int xs_tcp_send_request(struct rpc_task *task)
case -EAGAIN:
xs_nospace(task);
break;
+ default:
+ dprintk("RPC: sendmsg returned unrecognized error %d\n",
+ -status);
case -ECONNRESET:
xs_tcp_shutdown(xprt);
case -ECONNREFUSED:
case -ENOTCONN:
case -EPIPE:
- status = -ENOTCONN;
- clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
- break;
- default:
- dprintk("RPC: sendmsg returned unrecognized error %d\n",
- -status);
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
- xs_tcp_shutdown(xprt);
}
-
+out:
return status;
}
--
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