iotests/283: Check that finalize drops backup-top
[qemu.git] / hw / virtio / vhost-user-vsock.c
bloba6f08c26b9a78febd5b025438f67fd7aad99a197
1 /*
2 * Vhost-user vsock virtio device
4 * Copyright 2020 Red Hat, Inc.
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * (at your option) any later version. See the COPYING file in the
8 * top-level directory.
9 */
11 #include "qemu/osdep.h"
13 #include "qapi/error.h"
14 #include "qemu/error-report.h"
15 #include "hw/qdev-properties.h"
16 #include "hw/qdev-properties-system.h"
17 #include "hw/virtio/vhost-user-vsock.h"
19 static const int user_feature_bits[] = {
20 VIRTIO_F_VERSION_1,
21 VIRTIO_RING_F_INDIRECT_DESC,
22 VIRTIO_RING_F_EVENT_IDX,
23 VIRTIO_F_NOTIFY_ON_EMPTY,
24 VHOST_INVALID_FEATURE_BIT
27 static void vuv_get_config(VirtIODevice *vdev, uint8_t *config)
29 VHostUserVSock *vsock = VHOST_USER_VSOCK(vdev);
31 memcpy(config, &vsock->vsockcfg, sizeof(struct virtio_vsock_config));
34 static int vuv_handle_config_change(struct vhost_dev *dev)
36 VHostUserVSock *vsock = VHOST_USER_VSOCK(dev->vdev);
37 int ret = vhost_dev_get_config(dev, (uint8_t *)&vsock->vsockcfg,
38 sizeof(struct virtio_vsock_config));
39 if (ret < 0) {
40 error_report("get config space failed");
41 return -1;
44 virtio_notify_config(dev->vdev);
46 return 0;
49 const VhostDevConfigOps vsock_ops = {
50 .vhost_dev_config_notifier = vuv_handle_config_change,
53 static void vuv_set_status(VirtIODevice *vdev, uint8_t status)
55 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
56 bool should_start = status & VIRTIO_CONFIG_S_DRIVER_OK;
58 if (!vdev->vm_running) {
59 should_start = false;
62 if (vvc->vhost_dev.started == should_start) {
63 return;
66 if (should_start) {
67 int ret = vhost_vsock_common_start(vdev);
68 if (ret < 0) {
69 return;
71 } else {
72 vhost_vsock_common_stop(vdev);
76 static uint64_t vuv_get_features(VirtIODevice *vdev,
77 uint64_t features,
78 Error **errp)
80 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
82 return vhost_get_features(&vvc->vhost_dev, user_feature_bits, features);
85 static const VMStateDescription vuv_vmstate = {
86 .name = "vhost-user-vsock",
87 .unmigratable = 1,
90 static void vuv_device_realize(DeviceState *dev, Error **errp)
92 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(dev);
93 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
94 VHostUserVSock *vsock = VHOST_USER_VSOCK(dev);
95 int ret;
97 if (!vsock->conf.chardev.chr) {
98 error_setg(errp, "missing chardev");
99 return;
102 if (!vhost_user_init(&vsock->vhost_user, &vsock->conf.chardev, errp)) {
103 return;
106 vhost_vsock_common_realize(vdev, "vhost-user-vsock");
108 vhost_dev_set_config_notifier(&vvc->vhost_dev, &vsock_ops);
110 ret = vhost_dev_init(&vvc->vhost_dev, &vsock->vhost_user,
111 VHOST_BACKEND_TYPE_USER, 0);
112 if (ret < 0) {
113 error_setg_errno(errp, -ret, "vhost_dev_init failed");
114 goto err_virtio;
117 ret = vhost_dev_get_config(&vvc->vhost_dev, (uint8_t *)&vsock->vsockcfg,
118 sizeof(struct virtio_vsock_config));
119 if (ret < 0) {
120 error_setg_errno(errp, -ret, "get config space failed");
121 goto err_vhost_dev;
124 return;
126 err_vhost_dev:
127 vhost_dev_cleanup(&vvc->vhost_dev);
128 err_virtio:
129 vhost_vsock_common_unrealize(vdev);
130 vhost_user_cleanup(&vsock->vhost_user);
131 return;
134 static void vuv_device_unrealize(DeviceState *dev)
136 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(dev);
137 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
138 VHostUserVSock *vsock = VHOST_USER_VSOCK(dev);
140 /* This will stop vhost backend if appropriate. */
141 vuv_set_status(vdev, 0);
143 vhost_dev_cleanup(&vvc->vhost_dev);
145 vhost_vsock_common_unrealize(vdev);
147 vhost_user_cleanup(&vsock->vhost_user);
151 static Property vuv_properties[] = {
152 DEFINE_PROP_CHR("chardev", VHostUserVSock, conf.chardev),
153 DEFINE_PROP_END_OF_LIST(),
156 static void vuv_class_init(ObjectClass *klass, void *data)
158 DeviceClass *dc = DEVICE_CLASS(klass);
159 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
161 device_class_set_props(dc, vuv_properties);
162 dc->vmsd = &vuv_vmstate;
163 vdc->realize = vuv_device_realize;
164 vdc->unrealize = vuv_device_unrealize;
165 vdc->get_features = vuv_get_features;
166 vdc->get_config = vuv_get_config;
167 vdc->set_status = vuv_set_status;
170 static const TypeInfo vuv_info = {
171 .name = TYPE_VHOST_USER_VSOCK,
172 .parent = TYPE_VHOST_VSOCK_COMMON,
173 .instance_size = sizeof(VHostUserVSock),
174 .class_init = vuv_class_init,
177 static void vuv_register_types(void)
179 type_register_static(&vuv_info);
182 type_init(vuv_register_types)