From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57867) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1evshm-0005Ss-FF for qemu-devel@nongnu.org; Tue, 13 Mar 2018 18:47:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1evshl-0002vY-J8 for qemu-devel@nongnu.org; Tue, 13 Mar 2018 18:47:38 -0400 Received: from mail-wm0-x241.google.com ([2a00:1450:400c:c09::241]:54931) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1evshl-0002uV-CP for qemu-devel@nongnu.org; Tue, 13 Mar 2018 18:47:37 -0400 Received: by mail-wm0-x241.google.com with SMTP id h76so869688wme.4 for ; Tue, 13 Mar 2018 15:47:37 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini Date: Tue, 13 Mar 2018 23:46:22 +0100 Message-Id: <20180313224719.4954-13-pbonzini@redhat.com> In-Reply-To: <20180313224719.4954-1-pbonzini@redhat.com> References: <20180313224719.4954-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PULL 12/69] chardev: update net listener gcontext List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Xu From: Peter Xu TCP chardevs can be using QIO network listeners working in the background when in listening mode. However the network listeners are always running in main context. This can race with chardevs that are running in non-main contexts. To solve this, we need to re-setup the net listeners in tcp_chr_update_read_handler() with the newly cached gcontext. Reviewed-by: Marc-André Lureau Signed-off-by: Peter Xu Message-Id: <20180306053320.15401-4-peterx@redhat.com> Acked-by: Stefan Hajnoczi Reviewed-by: Daniel P. Berrangé Signed-off-by: Paolo Bonzini --- chardev/char-socket.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) diff --git a/chardev/char-socket.c b/chardev/char-socket.c index 541fcf487d..2475e1d52f 100644 --- a/chardev/char-socket.c +++ b/chardev/char-socket.c @@ -423,8 +423,8 @@ static void tcp_chr_disconnect(Chardev *chr) tcp_chr_free_connection(chr); if (s->listener) { - qio_net_listener_set_client_func(s->listener, tcp_chr_accept, - chr, NULL); + qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, + chr, NULL, chr->gcontext); } update_disconnected_filename(s); if (emit_close) { @@ -560,6 +560,16 @@ static void tcp_chr_update_read_handler(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); + if (s->listener) { + /* + * It's possible that chardev context is changed in + * qemu_chr_be_update_read_handlers(). Reset it for QIO net + * listener if there is. + */ + qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, + chr, NULL, chr->gcontext); + } + if (!s->connected) { return; } @@ -744,7 +754,8 @@ static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) qio_channel_set_delay(s->ioc, false); } if (s->listener) { - qio_net_listener_set_client_func(s->listener, NULL, NULL, NULL); + qio_net_listener_set_client_func_full(s->listener, NULL, NULL, + NULL, chr->gcontext); } if (s->tls_creds) { @@ -825,7 +836,8 @@ static void char_socket_finalize(Object *obj) tcp_chr_reconn_timer_cancel(s); qapi_free_SocketAddress(s->addr); if (s->listener) { - qio_net_listener_set_client_func(s->listener, NULL, NULL, NULL); + qio_net_listener_set_client_func_full(s->listener, NULL, NULL, + NULL, chr->gcontext); object_unref(OBJECT(s->listener)); } if (s->tls_creds) { @@ -981,8 +993,10 @@ static void qmp_chardev_open_socket(Chardev *chr, return; } if (!s->ioc) { - qio_net_listener_set_client_func(s->listener, tcp_chr_accept, - chr, NULL); + qio_net_listener_set_client_func_full(s->listener, + tcp_chr_accept, + chr, NULL, + chr->gcontext); } } else if (qemu_chr_wait_connected(chr, errp) < 0) { goto error; -- 2.14.3