From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Mon, 9 Feb 2015 02:44:04 +0000 (-0500)
Subject: SUNRPC: Handle EADDRINUSE on connect
X-Git-Tag: firefly_0821_release~176^2~2246^2~27
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3913c78c3ab61500ddf7c2c9617cc4f8e2c583e0;p=firefly-linux-kernel-4.4.55.git

SUNRPC: Handle EADDRINUSE on connect

Now that we're setting SO_REUSEPORT, we still need to handle the
case where a connect() is attempted, but the old socket is still
lingering.
Essentially, all we want to do here is handle the error by waiting
a few seconds and then retrying.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 3f5d4d48f0cb..612aa73bbc60 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1826,6 +1826,7 @@ call_connect_status(struct rpc_task *task)
 	case -ECONNABORTED:
 	case -ENETUNREACH:
 	case -EHOSTUNREACH:
+	case -EADDRINUSE:
 	case -ENOBUFS:
 	case -EPIPE:
 		if (RPC_IS_SOFTCONN(task))
@@ -1934,6 +1935,7 @@ call_transmit_status(struct rpc_task *task)
 		}
 	case -ECONNRESET:
 	case -ECONNABORTED:
+	case -EADDRINUSE:
 	case -ENOTCONN:
 	case -ENOBUFS:
 	case -EPIPE:
@@ -2053,6 +2055,7 @@ call_status(struct rpc_task *task)
 	case -ECONNRESET:
 	case -ECONNABORTED:
 		rpc_force_rebind(clnt);
+	case -EADDRINUSE:
 	case -ENOBUFS:
 		rpc_delay(task, 3*HZ);
 	case -EPIPE:
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 484c5040436a..20f25a837e06 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -721,6 +721,7 @@ static int xs_tcp_send_request(struct rpc_task *task)
 		xs_tcp_shutdown(xprt);
 	case -ECONNREFUSED:
 	case -ENOTCONN:
+	case -EADDRINUSE:
 	case -EPIPE:
 		clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
 	}
@@ -2299,6 +2300,7 @@ static void xs_tcp_setup_socket(struct work_struct *work)
 	case -ECONNREFUSED:
 	case -ECONNRESET:
 	case -ENETUNREACH:
+	case -EADDRINUSE:
 	case -ENOBUFS:
 		/* retry with existing socket, after a delay */
 		goto out;