int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force) { uint64_t features; int r; if (devfd >= 0) { hdev->control = devfd; } else { hdev->control = open("/dev/vhost-net", O_RDWR); if (hdev->control < 0) { return -errno; } } r = ioctl(hdev->control, VHOST_SET_OWNER, NULL); if (r < 0) { goto fail; } r = ioctl(hdev->control, VHOST_GET_FEATURES, &features); if (r < 0) { goto fail; } hdev->features = features; hdev->client.set_memory = vhost_client_set_memory; hdev->client.sync_dirty_bitmap = vhost_client_sync_dirty_bitmap; hdev->client.migration_log = vhost_client_migration_log; hdev->client.log_start = NULL; hdev->client.log_stop = NULL; hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions)); hdev->log = NULL; hdev->log_size = 0; hdev->log_enabled = false; hdev->started = false; cpu_register_phys_memory_client(&hdev->client); hdev->force = force; return 0; fail: r = -errno; close(hdev->control); return r; }