BlockDriverState *bdrv_new(const char *device_name, Error **errp) { BlockDriverState *bs; int i; if (bdrv_find(device_name)) { error_setg(errp, "Device with id '%s' already exists", device_name); return NULL; } if (bdrv_find_node(device_name)) { error_setg(errp, "Device with node-name '%s' already exists", device_name); return NULL; } bs = g_malloc0(sizeof(BlockDriverState)); QLIST_INIT(&bs->dirty_bitmaps); pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); if (device_name[0] != '\0') { QTAILQ_INSERT_TAIL(&bdrv_states, bs, device_list); } for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) { QLIST_INIT(&bs->op_blockers[i]); } bdrv_iostatus_disable(bs); notifier_list_init(&bs->close_notifiers); notifier_with_return_list_init(&bs->before_write_notifiers); qemu_co_queue_init(&bs->throttled_reqs[0]); qemu_co_queue_init(&bs->throttled_reqs[1]); bs->refcnt = 1; bs->aio_context = qemu_get_aio_context(); return bs; }