netdev - [PATCH net 2/5] vsock: Allow retrying on connect() failure

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Message-Id: <20250117-vsock-transport-vs-autobind-v1-2-c802c803762d@rbox.co>
Date: Fri, 17 Jan 2025 22:59:42 +0100
From: Michal Luczaj <mhal@...x.co>
To: Stefano Garzarella <sgarzare@...hat.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, George Zhang <georgezhang@...are.com>, 
 Dmitry Torokhov <dtor@...are.com>, Andy King <acking@...are.com>
Cc: netdev@...r.kernel.org, Michal Luczaj <mhal@...x.co>
Subject: [PATCH net 2/5] vsock: Allow retrying on connect() failure

sk_err is set when a (connectible) connect() fails. Effectively, this makes
an otherwise still healthy SS_UNCONNECTED socket impossible to use for any
subsequent connection attempts.

Clear sk_err upon trying to establish a connection.

Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")
Signed-off-by: Michal Luczaj <mhal@...x.co>
---
 net/vmw_vsock/af_vsock.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index cfe18bc8fdbe7ced073c6b3644d635fdbfa02610..075695173648d3a4ecbd04e908130efdbb393b41 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1523,6 +1523,11 @@ static int vsock_connect(struct socket *sock, struct sockaddr *addr,
 		if (err < 0)
 			goto out;

+		/* sk_err might have been set as a result of an earlier
+		 * (failed) connect attempt.
+		 */
+		sk->sk_err = 0;
+
 		/* Mark sock as connecting and set the error code to in
 		 * progress in case this is a non-blocking connect.
 		 */

-- 
2.47.1