From patchwork Tue Aug 23 07:50:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guoyi Tu X-Patchwork-Id: 12951837 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 B31E2C32774 for ; Tue, 23 Aug 2022 07:54:54 +0000 (UTC) Received: from localhost ([::1]:34690 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oQOkP-0004IE-RK for qemu-devel@archiver.kernel.org; Tue, 23 Aug 2022 03:54:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52282) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oQOh6-0001WG-8l for qemu-devel@nongnu.org; Tue, 23 Aug 2022 03:51:31 -0400 Received: from prt-mail.chinatelecom.cn ([42.123.76.223]:46440 helo=chinatelecom.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oQOh4-0007uD-4g for qemu-devel@nongnu.org; Tue, 23 Aug 2022 03:51:27 -0400 HMM_SOURCE_IP: 172.18.0.218:36912.1263259734 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-36.111.64.85 (unknown [172.18.0.218]) by chinatelecom.cn (HERMES) with SMTP id 31EE32800D6; Tue, 23 Aug 2022 15:51:07 +0800 (CST) X-189-SAVE-TO-SEND: +tugy@chinatelecom.cn Received: from ([172.18.0.218]) by app0025 with ESMTP id 12b6c66f5b274eb593bfc1590bad75b6 for peter.maydell@linaro.org; Tue, 23 Aug 2022 15:51:24 CST X-Transaction-ID: 12b6c66f5b274eb593bfc1590bad75b6 X-Real-From: tugy@chinatelecom.cn X-Receive-IP: 172.18.0.218 X-MEDUSA-Status: 0 From: tugy@chinatelecom.cn To: peter.maydell@linaro.org, f4bug@amsat.org, marcandre.lureau@redhat.com, qemu_oss@crudebyte.com, richard.henderson@linaro.org, berrange@redhat.com, mst@redhat.com, kraxel@redhat.com, qemu-devel@nongnu.org Cc: tugy@chinatelecom.cn Subject: [PATCH v1 1/2] oslib-posix: Introduce qemu_socketpair() Date: Tue, 23 Aug 2022 15:50:39 +0800 Message-Id: <17fa1eff729eeabd9a001f4639abccb127ceec81.1661240709.git.tugy@chinatelecom.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=42.123.76.223; envelope-from=tugy@chinatelecom.cn; helo=chinatelecom.cn 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, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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" From: Guoyi Tu qemu_socketpair() will create a pair of connected sockets with FD_CLOEXEC set Signed-off-by: Guoyi Tu --- include/qemu/sockets.h | 18 ++++++++++++++++++ util/oslib-posix.c | 19 +++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h index 038faa157f..036745e586 100644 --- a/include/qemu/sockets.h +++ b/include/qemu/sockets.h @@ -14,6 +14,24 @@ int inet_aton(const char *cp, struct in_addr *ia); /* misc helpers */ bool fd_is_socket(int fd); int qemu_socket(int domain, int type, int protocol); + +#ifndef WIN32 +/** + * qemu_socketpair: + * @domain: specifies a communication domain, such as PF_UNIX + * @type: specifies the socket type. + * @protocol: specifies a particular protocol to be used with the socket + * @sv: an array to store the pair of socket created + * + * Creates an unnamed pair of connected sockets in the specified domain, + * of the specified type, and using the optionally specified protocol. + * And automatically set the close-on-exec flags on the returned sockets + * + * Return 0 on success. + */ +int qemu_socketpair(int domain, int type, int protocol, int sv[2]); +#endif + int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen); int socket_set_cork(int fd, int v); int socket_set_nodelay(int fd); diff --git a/util/oslib-posix.c b/util/oslib-posix.c index 7a34c1657c..e5f5ebe469 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -261,6 +261,25 @@ void qemu_set_cloexec(int fd) assert(f != -1); } +int qemu_socketpair(int domain, int type, int protocol, int sv[2]) +{ + int ret; + +#ifdef SOCK_CLOEXEC + ret = socketpair(domain, type | SOCK_CLOEXEC, protocol, sv); + if (ret != -1 || errno != EINVAL) { + return ret; + } +#endif + ret = socketpair(domain, type, protocol, sv);; + if (ret == 0) { + qemu_set_cloexec(sv[0]); + qemu_set_cloexec(sv[1]); + } + + return ret; +} + char * qemu_get_local_state_dir(void) {