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[79.176.118.93]) by smtp.gmail.com with ESMTPSA id f3sm269918wrw.81.2020.11.03.06.35.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Nov 2020 06:35:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1604414145; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=vTElEagYE/6ac5+wAhrYnP4rDr3IItx6R4ENpWim+c0=; b=jBHzaGJKwfq50wPvIHh57SB+fkM4hEq04DboAi9INWxctQ7N1mFJf7tsoLaZ6esZLtyIek JhQgS4Vx2mT2kfpCm+4wTH0/qvpIA1zdSLYQHV3rh7TQ8A0g3BRJt84NF15APt9z3Riz1P 0bZ0C1mJl/CRczrj/kKJRiQqWWQIBBM= X-MC-Unique: EW7PwaYcMGqKPIKrSsRVWg-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=vTElEagYE/6ac5+wAhrYnP4rDr3IItx6R4ENpWim+c0=; b=QWV1g7ZR3ezFrdg5DfL0yztDLPijHBb3YQXqHxYD2Cx9Leb4AXPRJedHH73BCDgXtN 0XaMkPH/AwQACTQmAvKKQzx9TZbyISrg9UOJwYwguVuwUoYaBf2XnhjtiyGomjUHVh8M vSarrxtkKMerdlAqyee01763GcPNekDgGKVVXQGoWTm91fE1Li/yrNhqUcjw9QFa2hBy 691TGI4nb98IMZ/JdzOGRZhW7+LozNBQFs0ppTIhiCU3mJCvJRtQwXdL+MSliXhYXcBF ghuJb1WtydkHdC2dRCUW5t2ZdoQTcyhF4cojNZ25TTLQRM/+tjeToN1HeMNcNftlEVW4 I2tg== X-Gm-Message-State: AOAM5321gC4gvjSktC01MFFFVYeShslYj0GwrVZRUW57VyQ3yM0Cqgc/ YVBJil1jAb4tAZ/5TunsrOuJEkibu+CI+2/HS4p6TR11BCFK7ruKCbVLd311OWIvPYKUTgPjz+F uz3X9I6RLTwZ4x0k= X-Received: by 2002:adf:e650:: with SMTP id b16mr27420421wrn.350.1604414141418; Tue, 03 Nov 2020 06:35:41 -0800 (PST) X-Google-Smtp-Source: ABdhPJwMMNMGHZbO4LF+o7ud2HSluu0JBpRtCv3NEdYmUxzmzTThKN8EesY71rMtVjtNyP0xHDl/aw== X-Received: by 2002:adf:e650:: with SMTP id b16mr27420400wrn.350.1604414141204; Tue, 03 Nov 2020 06:35:41 -0800 (PST) Date: Tue, 3 Nov 2020 09:35:39 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL 38/38] vhost-user-blk-test: fix races by using fd passing Message-ID: <20201103142306.71782-39-mst@redhat.com> References: <20201103142306.71782-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20201103142306.71782-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline 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=216.205.24.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/03 00:03:41 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Peter Maydell , Thomas Huth , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Stefan Hajnoczi Pass the QMP and vhost-user-blk server sockets as file descriptors. That way the sockets are already open and in a listen state when the QEMU process is launched. This solves the race with qemu-storage-daemon startup where the UNIX domain sockets may not be ready yet when QEMU attempts to connect. It also saves us sleeping for 1 second if the qemu-storage-daemon QMP socket is not ready yet. Signed-off-by: Stefan Hajnoczi Message-Id: <20201027173528.213464-13-stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- tests/qtest/vhost-user-blk-test.c | 42 +++++++++++++++++++------------ 1 file changed, 26 insertions(+), 16 deletions(-) diff --git a/tests/qtest/vhost-user-blk-test.c b/tests/qtest/vhost-user-blk= -test.c index 0d056cc189..9589f90b14 100644 --- a/tests/qtest/vhost-user-blk-test.c +++ b/tests/qtest/vhost-user-blk-test.c @@ -683,8 +683,22 @@ static char *drive_create(void) return t_path; } =20 -static char sock_path_tempate[] =3D "/tmp/qtest.vhost_user_blk.XXXXXX"; -static char qmp_sock_path_tempate[] =3D "/tmp/qtest.vhost_user_blk.qmp.XXX= XXX"; +static char *create_listen_socket(int *fd) +{ + int tmp_fd; + char *path; + + /* No race because our pid makes the path unique */ + path =3D g_strdup_printf("/tmp/qtest-%d-sock.XXXXXX", getpid()); + tmp_fd =3D mkstemp(path); + g_assert_cmpint(tmp_fd, >=3D, 0); + close(tmp_fd); + unlink(path); + + *fd =3D qtest_socket_server(path); + g_test_queue_destroy(destroy_file, path); + return path; +} =20 static void quit_storage_daemon(void *qmp_test_state) { @@ -709,37 +723,33 @@ static void start_vhost_user_blk(GString *cmd_line, i= nt vus_instances, int num_queues) { const char *vhost_user_blk_bin =3D qtest_qemu_storage_daemon_binary(); - int fd, qmp_fd, i; + int qmp_fd, i; QTestState *qmp_test_state; gchar *img_path; - char *sock_path =3D NULL; - char *qmp_sock_path =3D g_strdup(qmp_sock_path_tempate); + char *qmp_sock_path; GString *storage_daemon_command =3D g_string_new(NULL); =20 - qmp_fd =3D mkstemp(qmp_sock_path); - g_assert_cmpint(qmp_fd, >=3D, 0); - g_test_queue_destroy(destroy_file, qmp_sock_path); + qmp_sock_path =3D create_listen_socket(&qmp_fd); =20 g_string_append_printf(storage_daemon_command, "exec %s " - "--chardev socket,id=3Dqmp,path=3D%s,server,nowait --monitor c= hardev=3Dqmp ", - vhost_user_blk_bin, qmp_sock_path); + "--chardev socket,id=3Dqmp,fd=3D%d,server,nowait --monitor cha= rdev=3Dqmp ", + vhost_user_blk_bin, qmp_fd); =20 g_string_append_printf(cmd_line, " -object memory-backend-memfd,id=3Dmem,size=3D256M,share=3Don= -M memory-backend=3Dmem "); =20 for (i =3D 0; i < vus_instances; i++) { - sock_path =3D g_strdup(sock_path_tempate); - fd =3D mkstemp(sock_path); - g_assert_cmpint(fd, >=3D, 0); - g_test_queue_destroy(drive_file, sock_path); + int fd; + char *sock_path =3D create_listen_socket(&fd); + /* create image file */ img_path =3D drive_create(); g_string_append_printf(storage_daemon_command, "--blockdev driver=3Dfile,node-name=3Ddisk%d,filename=3D%s " - "--export type=3Dvhost-user-blk,id=3Ddisk%d,addr.type=3Dunix,a= ddr.path=3D%s," + "--export type=3Dvhost-user-blk,id=3Ddisk%d,addr.type=3Dfd,add= r.str=3D%d," "node-name=3Ddisk%i,writable=3Don,num-queues=3D%d ", - i, img_path, i, sock_path, i, num_queues); + i, img_path, i, fd, i, num_queues); =20 g_string_append_printf(cmd_line, "-chardev socket,id=3Dchar%d,path= =3D%s ", i + 1, sock_path); --=20 MST