static int bdrv_open_driver(BlockDriverState *bs, BlockDriver *drv, const char *node_name, QDict *options, int open_flags, Error **errp) { Error *local_err = NULL; int ret; bdrv_assign_node_name(bs, node_name, &local_err); if (local_err) { error_propagate(errp, local_err); return -EINVAL; } bs->drv = drv; bs->read_only = !(bs->open_flags & BDRV_O_RDWR); bs->opaque = g_malloc0(drv->instance_size); if (drv->bdrv_file_open) { assert(!drv->bdrv_needs_filename || bs->filename[0]); ret = drv->bdrv_file_open(bs, options, open_flags, &local_err); } else if (drv->bdrv_open) { ret = drv->bdrv_open(bs, options, open_flags, &local_err); } else { ret = 0; } if (ret < 0) { if (local_err) { error_propagate(errp, local_err); } else if (bs->filename[0]) { error_setg_errno(errp, -ret, "Could not open '%s'", bs->filename); } else { error_setg_errno(errp, -ret, "Could not open image"); } goto free_and_fail; } ret = refresh_total_sectors(bs, bs->total_sectors); if (ret < 0) { error_setg_errno(errp, -ret, "Could not refresh total sector count"); goto free_and_fail; } bdrv_refresh_limits(bs, &local_err); if (local_err) { error_propagate(errp, local_err); ret = -EINVAL; goto free_and_fail; } assert(bdrv_opt_mem_align(bs) != 0); assert(bdrv_min_mem_align(bs) != 0); assert(is_power_of_2(bs->bl.request_alignment)); return 0; free_and_fail: /* FIXME Close bs first if already opened*/ g_free(bs->opaque); bs->opaque = NULL; bs->drv = NULL; return ret; }