int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, const char *tag) { while (bs && bs->drv && !bs->drv->bdrv_debug_breakpoint) { bs = bs->file; } if (bs && bs->drv && bs->drv->bdrv_debug_breakpoint) { return bs->drv->bdrv_debug_breakpoint(bs, event, tag); } return -ENOTSUP; }