test: new qTest case to test the vhost-user-blk-server

This test case has the same tests as tests/virtio-blk-test.c except for
tests have block_resize. Since the vhost-user-blk export only serves one
client one time, two exports are started by qemu-storage-daemon for the
hotplug test.

Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Coiby Xu <coiby.xu@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20210309094106.196911-3-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210322092327.150720-2-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

MAINTAINERS

@@ -3244,6 +3244,8 @@ F: block/export/vhost-user-blk-server.c
 F: block/export/vhost-user-blk-server.h
 F: include/qemu/vhost-user-server.h
 F: tests/qtest/libqos/vhost-user-blk.c
+F: tests/qtest/libqos/vhost-user-blk.h
+F: tests/qtest/vhost-user-blk-test.c
 F: util/vhost-user-server.c
 
 FUSE block device exports

tests/qtest/libqos/meson.build

@@ -32,6 +32,7 @@ libqos_srcs = files('../libqtest.c',
         'virtio-9p.c',
         'virtio-balloon.c',
         'virtio-blk.c',
+        'vhost-user-blk.c',
         'virtio-mmio.c',
         'virtio-net.c',
         'virtio-pci.c',

tests/qtest/libqos/vhost-user-blk.c

@@ -0,0 +1,130 @@
+/*
+ * libqos driver framework
+ *
+ * Based on tests/qtest/libqos/virtio-blk.c
+ *
+ * Copyright (c) 2020 Coiby Xu <coiby.xu@gmail.com>
+ *
+ * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "qemu/module.h"
+#include "standard-headers/linux/virtio_blk.h"
+#include "vhost-user-blk.h"
+
+#define PCI_SLOT                0x04
+#define PCI_FN                  0x00
+
+/* virtio-blk-device */
+static void *qvhost_user_blk_get_driver(QVhostUserBlk *v_blk,
+                                    const char *interface)
+{
+    if (!g_strcmp0(interface, "vhost-user-blk")) {
+        return v_blk;
+    }
+    if (!g_strcmp0(interface, "virtio")) {
+        return v_blk->vdev;
+    }
+
+    fprintf(stderr, "%s not present in vhost-user-blk-device\n", interface);
+    g_assert_not_reached();
+}
+
+static void *qvhost_user_blk_device_get_driver(void *object,
+                                           const char *interface)
+{
+    QVhostUserBlkDevice *v_blk = object;
+    return qvhost_user_blk_get_driver(&v_blk->blk, interface);
+}
+
+static void *vhost_user_blk_device_create(void *virtio_dev,
+                                      QGuestAllocator *t_alloc,
+                                      void *addr)
+{
+    QVhostUserBlkDevice *vhost_user_blk = g_new0(QVhostUserBlkDevice, 1);
+    QVhostUserBlk *interface = &vhost_user_blk->blk;
+
+    interface->vdev = virtio_dev;
+
+    vhost_user_blk->obj.get_driver = qvhost_user_blk_device_get_driver;
+
+    return &vhost_user_blk->obj;
+}
+
+/* virtio-blk-pci */
+static void *qvhost_user_blk_pci_get_driver(void *object, const char *interface)
+{
+    QVhostUserBlkPCI *v_blk = object;
+    if (!g_strcmp0(interface, "pci-device")) {
+        return v_blk->pci_vdev.pdev;
+    }
+    return qvhost_user_blk_get_driver(&v_blk->blk, interface);
+}
+
+static void *vhost_user_blk_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
+                                      void *addr)
+{
+    QVhostUserBlkPCI *vhost_user_blk = g_new0(QVhostUserBlkPCI, 1);
+    QVhostUserBlk *interface = &vhost_user_blk->blk;
+    QOSGraphObject *obj = &vhost_user_blk->pci_vdev.obj;
+
+    virtio_pci_init(&vhost_user_blk->pci_vdev, pci_bus, addr);
+    interface->vdev = &vhost_user_blk->pci_vdev.vdev;
+
+    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_BLOCK);
+
+    obj->get_driver = qvhost_user_blk_pci_get_driver;
+
+    return obj;
+}
+
+static void vhost_user_blk_register_nodes(void)
+{
+    /*
+     * FIXME: every test using these two nodes needs to setup a
+     * -drive,id=drive0 otherwise QEMU is not going to start.
+     * Therefore, we do not include "produces" edge for virtio
+     * and pci-device yet.
+     */
+
+    char *arg = g_strdup_printf("id=drv0,chardev=char1,addr=%x.%x",
+                                PCI_SLOT, PCI_FN);
+
+    QPCIAddress addr = {
+        .devfn = QPCI_DEVFN(PCI_SLOT, PCI_FN),
+    };
+
+    QOSGraphEdgeOptions opts = { };
+
+    /* virtio-blk-device */
+    /** opts.extra_device_opts = "drive=drive0"; */
+    qos_node_create_driver("vhost-user-blk-device",
+                           vhost_user_blk_device_create);
+    qos_node_consumes("vhost-user-blk-device", "virtio-bus", &opts);
+    qos_node_produces("vhost-user-blk-device", "vhost-user-blk");
+
+    /* virtio-blk-pci */
+    opts.extra_device_opts = arg;
+    add_qpci_address(&opts, &addr);
+    qos_node_create_driver("vhost-user-blk-pci", vhost_user_blk_pci_create);
+    qos_node_consumes("vhost-user-blk-pci", "pci-bus", &opts);
+    qos_node_produces("vhost-user-blk-pci", "vhost-user-blk");
+
+    g_free(arg);
+}
+
+libqos_init(vhost_user_blk_register_nodes);

tests/qtest/libqos/vhost-user-blk.h

@@ -0,0 +1,48 @@
+/*
+ * libqos driver framework
+ *
+ * Based on tests/qtest/libqos/virtio-blk.c
+ *
+ * Copyright (c) 2020 Coiby Xu <coiby.xu@gmail.com>
+ *
+ * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#ifndef TESTS_LIBQOS_VHOST_USER_BLK_H
+#define TESTS_LIBQOS_VHOST_USER_BLK_H
+
+#include "qgraph.h"
+#include "virtio.h"
+#include "virtio-pci.h"
+
+typedef struct QVhostUserBlk QVhostUserBlk;
+typedef struct QVhostUserBlkPCI QVhostUserBlkPCI;
+typedef struct QVhostUserBlkDevice QVhostUserBlkDevice;
+
+struct QVhostUserBlk {
+    QVirtioDevice *vdev;
+};
+
+struct QVhostUserBlkPCI {
+    QVirtioPCIDevice pci_vdev;
+    QVhostUserBlk blk;
+};
+
+struct QVhostUserBlkDevice {
+    QOSGraphObject obj;
+    QVhostUserBlk blk;
+};
+
+#endif

tests/qtest/meson.build

@@ -231,6 +231,9 @@ if have_virtfs
   qos_test_ss.add(files('virtio-9p-test.c'))
 endif
 qos_test_ss.add(when: 'CONFIG_VHOST_USER', if_true: files('vhost-user-test.c'))
+if have_tools and have_vhost_user_blk_server
+  qos_test_ss.add(files('vhost-user-blk-test.c'))
+endif
 
 tpmemu_files = ['tpm-emu.c', 'tpm-util.c', 'tpm-tests.c']
 
@@ -269,6 +272,7 @@ foreach dir : target_dirs
   endif
   qtest_env.set('G_TEST_DBUS_DAEMON', meson.source_root() / 'tests/dbus-vmstate-daemon.sh')
   qtest_env.set('QTEST_QEMU_BINARY', './qemu-system-' + target_base)
+  qtest_env.set('QTEST_QEMU_STORAGE_DAEMON_BINARY', './storage-daemon/qemu-storage-daemon')
   
   foreach test : target_qtests
     # Executables are shared across targets, declare them only the first time we