netdev - Re: strange tcp behavior

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Message-ID: <20070802184840.GA8901@2ka.mipt.ru>
Date:	Thu, 2 Aug 2007 22:48:42 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Simon Arlott <simon@...e.lp0.eu>
Cc:	john@...een.lv, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: strange tcp behavior

On Thu, Aug 02, 2007 at 10:08:42PM +0400, Evgeniy Polyakov (johnpol@....mipt.ru) wrote:
> So, following patch fixes problem for me.

Or this one. Essentially the same though.

Signed-off-by: Evgeniy Polyakov <johnpol@....mipt.ru>

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 06c08e5..7c47ef5 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -168,8 +168,14 @@ void inet_sock_destruct(struct sock *sk)
 static int inet_autobind(struct sock *sk)
 {
 	struct inet_sock *inet;
+
 	/* We may need to bind the socket. */
 	lock_sock(sk);
+	if (sk->sk_err || (sk->sk_state == TCP_CLOSE)) {
+		release_sock(sk);
+		return sk->sk_err;
+	}
+
 	inet = inet_sk(sk);
 	if (!inet->num) {
 		if (sk->sk_prot->get_port(sk, 0)) {
@@ -686,8 +692,11 @@ int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
 	struct sock *sk = sock->sk;
 
 	/* We may need to bind the socket. */
-	if (!inet_sk(sk)->num && inet_autobind(sk))
-		return -EAGAIN;
+	if (!inet_sk(sk)->num) {
+		int err = inet_autobind(sk);
+		if (err)
+			return err;
+	}
 
 	return sk->sk_prot->sendmsg(iocb, sk, msg, size);
 }
@@ -698,8 +707,11 @@ static ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
 	struct sock *sk = sock->sk;
 
 	/* We may need to bind the socket. */
-	if (!inet_sk(sk)->num && inet_autobind(sk))
-		return -EAGAIN;
+	if (!inet_sk(sk)->num) {
+		int err = inet_autobind(sk);
+		if (err)
+			return err;
+	}
 
 	if (sk->sk_prot->sendpage)
 		return sk->sk_prot->sendpage(sk, page, offset, size, flags);

-- 
	Evgeniy Polyakov
-
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