From nobody Tue Feb 10 18:55:50 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=yandex-team.ru ARC-Seal: i=1; a=rsa-sha256; t=1769722411; cv=none; d=zohomail.com; s=zohoarc; b=UIBixyQ56g06HWC0+waTmvizj1tLbf2EPQI2foUnR+qIZBJ85lHurnIHEGiWG74eZp/xn4tndCnUKLKVP7T4cN5Xll0jWgYsOXFbkVFwxPPnm2r5US7Dz/qEDloJkD0i431Nj/vIDtYpWhesFTCZDbfeMGzQrc43JvXU2IIMbD8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1769722411; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=zkwUUASolEhVxvg1YgpDo8GiYqPwUnrSrAAlmje9B6M=; b=BkFRcsmO2Ht4V0Hf3Ie5neyRZ3KxqJHlp1TYl5tCs1g3AfmVcyGjvqMVD6Sj7M1Z7ob7hwZgMQvauf4W0vPd5Qu8e3geDJ/2YPjSvtXYWNxbU8G09SSePkUv2yGhC4kR79gTtbeej4n9oO49aLrcfXJq84xSrw5JHxazNOAE+Nc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1769722411571614.9545475218343; Thu, 29 Jan 2026 13:33:31 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vlZcr-0001W3-FB; Thu, 29 Jan 2026 16:32:29 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vlZco-0001U9-Tp for qemu-devel@nongnu.org; Thu, 29 Jan 2026 16:32:26 -0500 Received: from forwardcorp1b.mail.yandex.net ([2a02:6b8:c02:900:1:45:d181:df01]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vlZcm-00018o-Ir for qemu-devel@nongnu.org; Thu, 29 Jan 2026 16:32:26 -0500 Received: from mail-nwsmtp-smtp-corp-canary-81.sas.yp-c.yandex.net (mail-nwsmtp-smtp-corp-canary-81.sas.yp-c.yandex.net [IPv6:2a02:6b8:c10:49f:0:640:b99a:0]) by forwardcorp1b.mail.yandex.net (Yandex) with ESMTPS id 2AC8680825; Fri, 30 Jan 2026 00:32:23 +0300 (MSK) Received: from vsementsov-lin (unknown [2a02:6bf:8080:b74::1:d]) by mail-nwsmtp-smtp-corp-canary-81.sas.yp-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id IWrbZO5AAOs0-3ZXUz4Kh; Fri, 30 Jan 2026 00:32:22 +0300 Precedence: bulk X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1769722342; bh=zkwUUASolEhVxvg1YgpDo8GiYqPwUnrSrAAlmje9B6M=; h=Message-ID:Date:In-Reply-To:Cc:Subject:References:To:From; b=Ao6f1w+c7YKzH8QUUARhwPy6eO1f7LJ6hpejuAkixwebJcsY1giR5aaEevTrBNUVE 7MyD0ANH+CPbdNKTbqHgl/pMoiocwyOI/+UR7cguEp4CiBE1yaKZ3EAcMpUgEp9dTX 9XcqPi7OIkBp79wg5mywWgwRB7hOvByF2hfnK8Bk= Authentication-Results: mail-nwsmtp-smtp-corp-canary-81.sas.yp-c.yandex.net; dkim=pass header.i=@yandex-team.ru From: Vladimir Sementsov-Ogievskiy To: jasowang@redhat.com Cc: qemu-devel@nongnu.org, bchaney@akamai.com, yc-core@yandex-team.ru, d-tatianin@yandex-team.ru, davydov-max@yandex-team.ru, vsementsov@yandex-team.ru Subject: [PATCH v2 05/12] net/tap: net_init_tap(): common fail label Date: Fri, 30 Jan 2026 00:32:07 +0300 Message-ID: <20260129213215.1405459-6-vsementsov@yandex-team.ru> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260129213215.1405459-1-vsementsov@yandex-team.ru> References: <20260129213215.1405459-1-vsementsov@yandex-team.ru> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a02:6b8:c02:900:1:45:d181:df01; envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1b.mail.yandex.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yandex-team.ru) X-ZM-MESSAGEID: 1769722412588158500 Content-Type: text/plain; charset="utf-8" Add common failure label. This: - simplifies failure paths in the function - get rid of unusual free_fail: in the middle of the function - simplify further refactoring Signed-off-by: Vladimir Sementsov-Ogievskiy --- net/tap.c | 84 ++++++++++++++++++++++++------------------------------- 1 file changed, 37 insertions(+), 47 deletions(-) diff --git a/net/tap.c b/net/tap.c index 331a779585..2eb8a2caeb 100644 --- a/net/tap.c +++ b/net/tap.c @@ -820,10 +820,12 @@ int net_init_tap(const Netdev *netdev, const char *na= me, NetClientState *peer, Error **errp) { const NetdevTapOptions *tap; - int fd, vnet_hdr =3D 0, i =3D 0, queues; + int fd =3D -1, vnet_hdr =3D 0, i =3D 0, queues; /* for the no-fd, no-helper case */ char ifname[128]; - int ret =3D 0; + char **fds =3D NULL, **vhost_fds =3D NULL; + int nfds =3D 0, nvhosts =3D 0; + =20 assert(netdev->type =3D=3D NET_CLIENT_DRIVER_TAP); tap =3D &netdev->u.tap; @@ -867,31 +869,24 @@ int net_init_tap(const Netdev *netdev, const char *na= me, if (tap->fd) { fd =3D monitor_fd_param(monitor_cur(), tap->fd, errp); if (fd =3D=3D -1) { - return -1; + goto fail; } =20 if (!qemu_set_blocking(fd, false, errp)) { - close(fd); - return -1; + goto fail; } =20 vnet_hdr =3D tap_probe_vnet_hdr(fd, errp); if (vnet_hdr < 0) { - close(fd); - return -1; + goto fail; } =20 if (!net_init_tap_one(tap, peer, "tap", name, NULL, NULL, NULL, tap->vhostfd, vnet_hdr, fd, errp)) { - close(fd); - return -1; + goto fail; } } else if (tap->fds) { - char **fds; - char **vhost_fds; - int nfds =3D 0, nvhosts =3D 0; - fds =3D g_new0(char *, MAX_TAP_QUEUES); vhost_fds =3D g_new0(char *, MAX_TAP_QUEUES); =20 @@ -901,77 +896,58 @@ int net_init_tap(const Netdev *netdev, const char *na= me, if (nfds !=3D nvhosts) { error_setg(errp, "The number of fds passed does not match " "the number of vhostfds passed"); - ret =3D -1; - goto free_fail; + goto fail; } } =20 for (i =3D 0; i < nfds; i++) { fd =3D monitor_fd_param(monitor_cur(), fds[i], errp); if (fd =3D=3D -1) { - ret =3D -1; - goto free_fail; + goto fail; } =20 if (!qemu_set_blocking(fd, false, errp)) { - ret =3D -1; - goto free_fail; + goto fail; } =20 if (i =3D=3D 0) { vnet_hdr =3D tap_probe_vnet_hdr(fd, errp); if (vnet_hdr < 0) { - ret =3D -1; - goto free_fail; + goto fail; } } else if (vnet_hdr !=3D tap_probe_vnet_hdr(fd, NULL)) { error_setg(errp, "vnet_hdr not consistent across given tap fds"); - ret =3D -1; - goto free_fail; + goto fail; } =20 if (!net_init_tap_one(tap, peer, "tap", name, ifname, NULL, NULL, tap->vhostfds ? vhost_fds[i] : NULL, vnet_hdr, fd, errp)) { - ret =3D -1; - goto free_fail; + goto fail; } } - -free_fail: - for (i =3D 0; i < nvhosts; i++) { - g_free(vhost_fds[i]); - } - for (i =3D 0; i < nfds; i++) { - g_free(fds[i]); - } - g_free(fds); - g_free(vhost_fds); - return ret; } else if (tap->helper) { fd =3D net_bridge_run_helper(tap->helper, tap->br ?: DEFAULT_BRIDGE_INTERFACE, errp); if (fd =3D=3D -1) { - return -1; + goto fail; } =20 if (!qemu_set_blocking(fd, false, errp)) { - return -1; + goto fail; } vnet_hdr =3D tap_probe_vnet_hdr(fd, errp); if (vnet_hdr < 0) { - close(fd); - return -1; + goto fail; } =20 if (!net_init_tap_one(tap, peer, "bridge", name, ifname, NULL, NULL, tap->vhostfd, vnet_hdr, fd, errp)) { - close(fd); - return -1; + goto fail; } } else { g_autofree char *script =3D @@ -989,14 +965,13 @@ free_fail: fd =3D net_tap_init(tap, &vnet_hdr, i >=3D 1 ? NULL : script, ifname, sizeof ifname, queues > 1, errp); if (fd =3D=3D -1) { - return -1; + goto fail; } =20 if (queues > 1 && i =3D=3D 0 && !tap->ifname) { if (tap_fd_get_ifname(fd, ifname)) { error_setg(errp, "Fail to get ifname"); - close(fd); - return -1; + goto fail; } } =20 @@ -1004,13 +979,28 @@ free_fail: i >=3D 1 ? NULL : script, i >=3D 1 ? NULL : downscript, tap->vhostfd, vnet_hdr, fd, errp)) { - close(fd); - return -1; + goto fail; } } } =20 return 0; + +fail: + close(fd); + if (vhost_fds) { + for (i =3D 0; i < nvhosts; i++) { + g_free(vhost_fds[i]); + } + g_free(vhost_fds); + } + if (fds) { + for (i =3D 0; i < nfds; i++) { + g_free(fds[i]); + } + g_free(fds); + } + return -1; } =20 int tap_enable(NetClientState *nc) --=20 2.52.0