int vhost_dev_init(struct vhost_dev *hdev, void *opaque, VhostBackendType backend_type, bool force) { uint64_t features; int i, r; if (vhost_set_backend_type(hdev, backend_type) < 0) { close((uintptr_t)opaque); return -1; } if (hdev->vhost_ops->vhost_backend_init(hdev, opaque) < 0) { close((uintptr_t)opaque); return -errno; } r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_OWNER, NULL); if (r < 0) { goto fail; } r = hdev->vhost_ops->vhost_call(hdev, VHOST_GET_FEATURES, &features); if (r < 0) { goto fail; } for (i = 0; i < hdev->nvqs; ++i) { r = vhost_virtqueue_init(hdev, hdev->vqs + i, i); if (r < 0) { goto fail_vq; } } hdev->features = features; hdev->memory_listener = (MemoryListener) { .begin = vhost_begin, .commit = vhost_commit, .region_add = vhost_region_add, .region_del = vhost_region_del, .region_nop = vhost_region_nop, .log_start = vhost_log_start, .log_stop = vhost_log_stop, .log_sync = vhost_log_sync, .log_global_start = vhost_log_global_start, .log_global_stop = vhost_log_global_stop, .eventfd_add = vhost_eventfd_add, .eventfd_del = vhost_eventfd_del, .priority = 10 }; hdev->migration_blocker = NULL; if (!(hdev->features & (0x1ULL << VHOST_F_LOG_ALL))) { error_setg(&hdev->migration_blocker, "Migration disabled: vhost lacks VHOST_F_LOG_ALL feature."); migrate_add_blocker(hdev->migration_blocker); } hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions)); hdev->n_mem_sections = 0; hdev->mem_sections = NULL; hdev->log = NULL; hdev->log_size = 0; hdev->log_enabled = false; hdev->started = false; hdev->memory_changed = false; memory_listener_register(&hdev->memory_listener, &address_space_memory); hdev->force = force; return 0; fail_vq: while (--i >= 0) { vhost_virtqueue_cleanup(hdev->vqs + i); } fail: r = -errno; hdev->vhost_ops->vhost_backend_cleanup(hdev); return r; }