Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 14/17] VSOCK: do not disconnect socket when peer has shutdown SEND only | Date | Mon, 16 May 2016 18:14:15 -0700 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Ian Campbell <ian.campbell@docker.com>
[ 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@docker.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stefan Hajnoczi <stefanha@redhat.com> Cc: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Cc: Andy King <acking@vmware.com> Cc: Dmitry Torokhov <dtor@vmware.com> Cc: Jorgen Hansen <jhansen@vmware.com> Cc: Adit Ranadive <aditr@vmware.com> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- 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);
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