From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030303AbcEXR6J (ORCPT ); Tue, 24 May 2016 13:58:09 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:38105 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965104AbcEXR4a (ORCPT ); Tue, 24 May 2016 13:56:30 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Ian Campbell , "David S. Miller" , Stefan Hajnoczi , Claudio Imbrenda , Andy King , Dmitry Torokhov , Jorgen Hansen , Adit Ranadive , netdev@vger.kernel.org, Kamal Mostafa Subject: [PATCH 4.2.y-ckt 48/53] VSOCK: do not disconnect socket when peer has shutdown SEND only Date: Tue, 24 May 2016 10:55:18 -0700 Message-Id: <1464112523-3701-49-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1464112523-3701-1-git-send-email-kamal@canonical.com> References: <1464112523-3701-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.2.8-ckt11 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Ian Campbell [ 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 Cc: "David S. Miller" Cc: Stefan Hajnoczi Cc: Claudio Imbrenda Cc: Andy King Cc: Dmitry Torokhov Cc: Jorgen Hansen Cc: Adit Ranadive Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- net/vmw_vsock/af_vsock.c | 21 +-------------------- 1 file changed, 1 insertion(+), 20 deletions(-) diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index df5fc6b..d68716c 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1795,27 +1795,8 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 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); -- 2.7.4