This is a note to let you know that I've just added the patch titled
VSOCK: do not disconnect socket when peer has shutdown SEND only
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vsock-do-not-disconnect-socket-when-peer-has-shutdown-send-only.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon May 16 14:28:53 PDT 2016
From: Ian Campbell <ian.campbell@xxxxxxxxxx>
Date: Wed, 4 May 2016 14:21:53 +0100
Subject: VSOCK: do not disconnect socket when peer has shutdown SEND only
Status: RO
Content-Length: 2059
Lines: 63
From: Ian Campbell <ian.campbell@xxxxxxxxxx>
[ Upstream commit dedc58e067d8c379a15a8a183c5db318201295bb ]
The peer may be expecting a reply having sent a request and then done a
shutdown(SHUT_WR), so tearing down the whole socket at this point seems
wrong and breaks for me with a client which does a SHUT_WR.
Looking at other socket family's stream_recvmsg callbacks doing a shutdown
here does not seem to be the norm and removing it does not seem to have
had any adverse effects that I can see.
I'm using Stefan's RFC virtio transport patches, I'm unsure of the impact
on the vmci transport.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Cc: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxxxxxxx>
Cc: Andy King <acking@xxxxxxxxxx>
Cc: Dmitry Torokhov <dtor@xxxxxxxxxx>
Cc: Jorgen Hansen <jhansen@xxxxxxxxxx>
Cc: Adit Ranadive <aditr@xxxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/vmw_vsock/af_vsock.c | 21 +--------------------
1 file changed, 1 insertion(+), 20 deletions(-)
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1796,27 +1796,8 @@ vsock_stream_recvmsg(struct kiocb *kiocb
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
- if (copied > 0) {
- /* We only do these additional bookkeeping/notification steps
- * if we actually copied something out of the queue pair
- * instead of just peeking ahead.
- */
-
- if (!(flags & MSG_PEEK)) {
- /* If the other side has shutdown for sending and there
- * is nothing more to read, then modify the socket
- * state.
- */
- if (vsk->peer_shutdown & SEND_SHUTDOWN) {
- if (vsock_stream_has_data(vsk) <= 0) {
- sk->sk_state = SS_UNCONNECTED;
- sock_set_flag(sk, SOCK_DONE);
- sk->sk_state_change(sk);
- }
- }
- }
+ if (copied > 0)
err = copied;
- }
out_wait:
finish_wait(sk_sleep(sk), &wait);
Patches currently in stable-queue which might be from ian.campbell@xxxxxxxxxx are
queue-3.14/vsock-do-not-disconnect-socket-when-peer-has-shutdown-send-only.patch
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