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

   1 /*
   2  * libqos driver framework
   3  *
   4  * Based on tests/qtest/libqos/virtio-blk.c
   5  *
   6  * Copyright (c) 2020 Coiby Xu <coiby.xu@gmail.com>
   7  *
   8  * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License version 2.1 as published by the Free Software Foundation.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "libqtest.h"
  25 #include "qemu/module.h"
  26 #include "standard-headers/linux/virtio_blk.h"
  27 #include "vhost-user-blk.h"
  28
  29 #define PCI_SLOT                0x04
  30 #define PCI_FN                  0x00
  31
  32 /* virtio-blk-device */
  33 static void *qvhost_user_blk_get_driver(QVhostUserBlk *v_blk,
  34                                     const char *interface)
  35 {
  36     if (!g_strcmp0(interface, "vhost-user-blk")) {
  37         return v_blk;
  38     }
  39     if (!g_strcmp0(interface, "virtio")) {
  40         return v_blk->vdev;
  41     }
  42
  43     fprintf(stderr, "%s not present in vhost-user-blk-device\n", interface);
  44     g_assert_not_reached();
  45 }
  46
  47 static void *qvhost_user_blk_device_get_driver(void *object,
  48                                            const char *interface)
  49 {
  50     QVhostUserBlkDevice *v_blk = object;
  51     return qvhost_user_blk_get_driver(&v_blk->blk, interface);
  52 }
  53
  54 static void *vhost_user_blk_device_create(void *virtio_dev,
  55                                       QGuestAllocator *t_alloc,
  56                                       void *addr)
  57 {
  58     QVhostUserBlkDevice *vhost_user_blk = g_new0(QVhostUserBlkDevice, 1);
  59     QVhostUserBlk *interface = &vhost_user_blk->blk;
  60
  61     interface->vdev = virtio_dev;
  62
  63     vhost_user_blk->obj.get_driver = qvhost_user_blk_device_get_driver;
  64
  65     return &vhost_user_blk->obj;
  66 }
  67
  68 /* virtio-blk-pci */
  69 static void *qvhost_user_blk_pci_get_driver(void *object, const char *interface)
  70 {
  71     QVhostUserBlkPCI *v_blk = object;
  72     if (!g_strcmp0(interface, "pci-device")) {
  73         return v_blk->pci_vdev.pdev;
  74     }
  75     return qvhost_user_blk_get_driver(&v_blk->blk, interface);
  76 }
  77
  78 static void *vhost_user_blk_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
  79                                       void *addr)
  80 {
  81     QVhostUserBlkPCI *vhost_user_blk = g_new0(QVhostUserBlkPCI, 1);
  82     QVhostUserBlk *interface = &vhost_user_blk->blk;
  83     QOSGraphObject *obj = &vhost_user_blk->pci_vdev.obj;
  84
  85     virtio_pci_init(&vhost_user_blk->pci_vdev, pci_bus, addr);
  86     interface->vdev = &vhost_user_blk->pci_vdev.vdev;
  87
  88     g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_BLOCK);
  89
  90     obj->get_driver = qvhost_user_blk_pci_get_driver;
  91
  92     return obj;
  93 }
  94
  95 static void vhost_user_blk_register_nodes(void)
  96 {
  97     /*
  98      * FIXME: every test using these two nodes needs to setup a
  99      * -drive,id=drive0 otherwise QEMU is not going to start.
 100      * Therefore, we do not include "produces" edge for virtio
 101      * and pci-device yet.
 102      */
 103
 104     char *arg = g_strdup_printf("id=drv0,chardev=char1,addr=%x.%x",
 105                                 PCI_SLOT, PCI_FN);
 106
 107     QPCIAddress addr = {
 108         .devfn = QPCI_DEVFN(PCI_SLOT, PCI_FN),
 109     };
 110
 111     QOSGraphEdgeOptions opts = { };
 112
 113     /* virtio-blk-device */
 114     /** opts.extra_device_opts = "drive=drive0"; */
 115     qos_node_create_driver("vhost-user-blk-device",
 116                            vhost_user_blk_device_create);
 117     qos_node_consumes("vhost-user-blk-device", "virtio-bus", &opts);
 118     qos_node_produces("vhost-user-blk-device", "vhost-user-blk");
 119
 120     /* virtio-blk-pci */
 121     opts.extra_device_opts = arg;
 122     add_qpci_address(&opts, &addr);
 123     qos_node_create_driver("vhost-user-blk-pci", vhost_user_blk_pci_create);
 124     qos_node_consumes("vhost-user-blk-pci", "pci-bus", &opts);
 125     qos_node_produces("vhost-user-blk-pci", "vhost-user-blk");
 126
 127     g_free(arg);
 128 }
 129
 130 libqos_init(vhost_user_blk_register_nodes);