From 4d6c671ace569d4b0d3f8d92ab3aef18a5d166bc Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 10 Mar 2019 12:22:39 -0400 Subject: [PATCH] SUNRPC: Take the transport send lock before binding+connecting Before trying to bind a port, ensure we grab the send lock to ensure that we don't change the port while another task is busy transmitting requests. The connect code already takes the send lock in xprt_connect(), but it is harmless to take it before that. Signed-off-by: Trond Myklebust --- net/sunrpc/clnt.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 498dd6ad5bc5..4216fe33204a 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1867,6 +1867,9 @@ call_bind(struct rpc_task *task) dprint_status(task); task->tk_action = call_bind_status; + if (!xprt_prepare_transmit(task)) + return; + task->tk_timeout = xprt->bind_timeout; xprt->ops->rpcbind(task); } @@ -1911,6 +1914,8 @@ call_bind_status(struct rpc_task *task) task->tk_rebind_retry--; rpc_delay(task, 3*HZ); goto retry_timeout; + case -EAGAIN: + goto retry_timeout; case -ETIMEDOUT: dprintk("RPC: %5u rpcbind request timed out\n", task->tk_pid); @@ -1952,7 +1957,7 @@ call_bind_status(struct rpc_task *task) retry_timeout: task->tk_status = 0; - task->tk_action = call_encode; + task->tk_action = call_bind; rpc_check_timeout(task); } @@ -1986,6 +1991,8 @@ call_connect(struct rpc_task *task) rpc_exit(task, -ENOTCONN); return; } + if (!xprt_prepare_transmit(task)) + return; xprt_connect(task); }