From patchwork Tue Oct 11 20:05:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 13004317 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E98DAC433FE for ; Tue, 11 Oct 2022 20:24:51 +0000 (UTC) Received: from localhost ([::1]:51708 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oiLo2-00048B-Sc for qemu-devel@archiver.kernel.org; Tue, 11 Oct 2022 16:24:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55058) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oiLW0-0006Pa-IA for qemu-devel@nongnu.org; Tue, 11 Oct 2022 16:06:19 -0400 Received: from mout.kundenserver.de ([212.227.126.131]:52275) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oiLVy-0003lI-Bz for qemu-devel@nongnu.org; Tue, 11 Oct 2022 16:06:12 -0400 Received: from lenovo-t14s.redhat.com ([82.142.8.70]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MIdNt-1ouDbf14LN-00EeHJ; Tue, 11 Oct 2022 22:05:58 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Cc: Stefano Stabellini , =?utf-8?q?Daniel_P=2E_Berra?= =?utf-8?q?ng=C3=A9?= , "Dr. David Alan Gilbert" , Jason Wang , "Michael S. Tsirkin" , Paolo Bonzini , Anthony Perard , Greg Kurz , Eric Blake , Laurent Vivier , Stefan Weil , Thomas Huth , Samuel Thibault , Markus Armbruster , Paul Durrant , David Gibson , xen-devel@lists.xenproject.org, Stefano Brivio Subject: [PATCH v11 09/17] net: stream: add unix socket Date: Tue, 11 Oct 2022 22:05:31 +0200 Message-Id: <20221011200539.1486809-10-lvivier@redhat.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221011200539.1486809-1-lvivier@redhat.com> References: <20221011200539.1486809-1-lvivier@redhat.com> MIME-Version: 1.0 X-Provags-ID: V03:K1:TTHfVWOgPgee4bZdwhYPecNKVWtAvUXEFq4LgYltpAsxHaGFLZi Bbowmq/q7DgrZKJcL+oo3DMFMYNV3KX94C8xyf4MnsLqa3HoHCU2Wr7gK4fQrBT6FEW0gh4 8MnHiRvJq4mlhw7r3YCAufenYjX5SmDTzCmOdeDHq1itgsak3KXVhBi02CM6sr/xQpcxOlj 0WdOA+4tT7jaczBDOC8uA== X-UI-Out-Filterresults: notjunk:1;V03:K0:i5UNhCj3wgA=:EcVvztxxjJbSBfe65Ew/L7 CapUFLFRHeHKowk51tPqzPHSo1XNxsCtSeNFfq5A/d6tYh+XckRTK29jE6QNM24YlLBEnyDFl fQAfyUS/BpctF7vPF6TdxMC7jDc5sTCuqF41uxCkQMqd6ybbdJQhcnD2KOFDDOyJqdeqwf951 NS7ARG814ST/57/q1D/Od6/ueBIHYjcCPcFuuYdxlFi+GzKL9648bbIZnyGZJcsihGJbLedSF fR2YiS5FYEjZn8Fx04wSwbyKScXNSxRpqxTHiXBeQusSWwGbdvWX+sbTZLVk4Cc3qSAMGEoap O0F3xdv1bFbreqLzZv5gqsXC0vPD0rONVytJkREkI6G0DLqw0Yn3Fx8WXONZgQIHkU8jbEcua DPcdFkMzcFJm4Utjl70aa7oc5sbPbO2vBcrKJ8XRHeSXmn6AyN+fIR1G87QviemBs34ub8Qsi E1cOsMmiFVZqtp7awg6fnSWe0GMFr76ioi5HuDZgVc7WWoVyqBsCuH34t0Wf0pe3DstIk3aPm ACh/uqUACrqEtpyufCiiBVjvoM7BuITZm9aps1IaSS+l+Z6QxXCaZESqqaRkDxUTpB6znJA48 hLiPPF4lNycouxEsvCGvffBay0K68ZH8YMFZJGX2vt9sRX9XN/uNo6MFuIu/VLeiaFThhqom8 1OpX8Hbx8Krz1QOChguMtbMLQr/wcyaZzBYjMvG621SHKxtXlgNMsA/3GV8jyl47h5UJZDBj1 5/qIQ1vDJpO2Nb5cKb5hv7m1YxdIu2ww4JACYOk4CceXbTNFXC8rcUwKOVnKeOMGzw+Otit1N GNRiyGD Received-SPF: permerror client-ip=212.227.126.131; envelope-from=lvivier@redhat.com; helo=mout.kundenserver.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_FAIL=0.001, SPF_HELO_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Laurent Vivier Reviewed-by: Stefano Brivio Acked-by: Michael S. Tsirkin Acked-by: Markus Armbruster --- net/stream.c | 107 +++++++++++++++++++++++++++++++++++++++++++++--- qapi/net.json | 2 +- qemu-options.hx | 1 + 3 files changed, 104 insertions(+), 6 deletions(-) diff --git a/net/stream.c b/net/stream.c index 26e485438718..d26c79d035fc 100644 --- a/net/stream.c +++ b/net/stream.c @@ -235,7 +235,7 @@ static NetStreamState *net_stream_fd_init(NetClientState *peer, static void net_stream_accept(void *opaque) { NetStreamState *s = opaque; - struct sockaddr_in saddr; + struct sockaddr_storage saddr; socklen_t len; int fd; @@ -253,8 +253,26 @@ static void net_stream_accept(void *opaque) s->fd = fd; s->nc.link_down = false; net_stream_connect(s); - qemu_set_info_str(&s->nc, "connection from %s:%d", - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); + switch (saddr.ss_family) { + case AF_INET: { + struct sockaddr_in *saddr_in = (struct sockaddr_in *)&saddr; + + qemu_set_info_str(&s->nc, "connection from %s:%d", + inet_ntoa(saddr_in->sin_addr), + ntohs(saddr_in->sin_port)); + break; + } + case AF_UNIX: { + struct sockaddr_un saddr_un; + + len = sizeof(saddr_un); + getsockname(s->listen_fd, (struct sockaddr *)&saddr_un, &len); + qemu_set_info_str(&s->nc, "connect from %s", saddr_un.sun_path); + break; + } + default: + g_assert_not_reached(); + } } static int net_stream_server_init(NetClientState *peer, @@ -294,6 +312,43 @@ static int net_stream_server_init(NetClientState *peer, } break; } + case SOCKET_ADDRESS_TYPE_UNIX: { + struct sockaddr_un saddr_un; + + ret = unlink(addr->u.q_unix.path); + if (ret < 0 && errno != ENOENT) { + error_setg_errno(errp, errno, "failed to unlink socket %s", + addr->u.q_unix.path); + return -1; + } + + saddr_un.sun_family = PF_UNIX; + ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s", + addr->u.q_unix.path); + if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + addr->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(saddr_un.sun_path)); + return -1; + } + + fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0); + if (fd < 0) { + error_setg_errno(errp, errno, "can't create stream socket"); + return -1; + } + qemu_socket_set_nonblock(fd); + + ret = bind(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un)); + if (ret < 0) { + error_setg_errno(errp, errno, "can't create socket with path: %s", + saddr_un.sun_path); + closesocket(fd); + return -1; + } + break; + } case SOCKET_ADDRESS_TYPE_FD: fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp); if (fd == -1) { @@ -337,6 +392,7 @@ static int net_stream_client_init(NetClientState *peer, { NetStreamState *s; struct sockaddr_in saddr_in; + struct sockaddr_un saddr_un; int fd, connected, ret; switch (addr->type) { @@ -373,6 +429,45 @@ static int net_stream_client_init(NetClientState *peer, } } break; + case SOCKET_ADDRESS_TYPE_UNIX: + saddr_un.sun_family = PF_UNIX; + ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s", + addr->u.q_unix.path); + if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + addr->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(saddr_un.sun_path)); + return -1; + } + + fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0); + if (fd < 0) { + error_setg_errno(errp, errno, "can't create stream socket"); + return -1; + } + qemu_socket_set_nonblock(fd); + + connected = 0; + for (;;) { + ret = connect(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un)); + if (ret < 0) { + if (errno == EINTR || errno == EWOULDBLOCK) { + /* continue */ + } else if (errno == EAGAIN || + errno == EALREADY) { + break; + } else { + error_setg_errno(errp, errno, "can't connect socket"); + closesocket(fd); + return -1; + } + } else { + connected = 1; + break; + } + } + break; case SOCKET_ADDRESS_TYPE_FD: fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp); if (fd == -1) { @@ -387,7 +482,7 @@ static int net_stream_client_init(NetClientState *peer, connected = 1; break; default: - error_setg(errp, "only support inet or fd type"); + error_setg(errp, "only support inet, unix or fd type"); return -1; } @@ -399,13 +494,15 @@ static int net_stream_client_init(NetClientState *peer, inet_ntoa(saddr_in.sin_addr), ntohs(saddr_in.sin_port)); break; + case SOCKET_ADDRESS_TYPE_UNIX: + qemu_set_info_str(&s->nc, " connect to %s", saddr_un.sun_path); + break; case SOCKET_ADDRESS_TYPE_FD: qemu_set_info_str(&s->nc, "connect to fd %d", fd); break; default: g_assert_not_reached(); } - return 0; } diff --git a/qapi/net.json b/qapi/net.json index 57bc7100cf02..a85eddcaed92 100644 --- a/qapi/net.json +++ b/qapi/net.json @@ -583,7 +583,7 @@ # or connect to (server=false) # @server: create server socket (default: true) # -# Only SocketAddress types 'inet' and 'fd' are supported. +# Only SocketAddress types 'unix', 'inet' and 'fd' are supported. # # Since: 7.2 ## diff --git a/qemu-options.hx b/qemu-options.hx index 83c0f9fd0630..242c45e44af3 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2757,6 +2757,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, " configure a network backend to connect to another network\n" " using an UDP tunnel\n" "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n" + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n" "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=file-descriptor\n" " configure a network backend to connect to another network\n" " using a socket connection in stream mode.\n"