static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, BdrvTrackedRequest *req, int64_t offset, unsigned int bytes, QEMUIOVector *qiov, int flags) { BlockDriver *drv = bs->drv; int ret; int64_t sector_num = offset >> BDRV_SECTOR_BITS; unsigned int nb_sectors = bytes >> BDRV_SECTOR_BITS; assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); if (bs->copy_on_read_in_flight) { wait_for_overlapping_requests(bs, req, offset, bytes); } ret = notifier_with_return_list_notify(&bs->before_write_notifiers, req); if (ret < 0) { /* Do nothing, write notifier decided to fail this request */ } else if (flags & BDRV_REQ_ZERO_WRITE) { ret = bdrv_co_do_write_zeroes(bs, sector_num, nb_sectors, flags); } else { ret = drv->bdrv_co_writev(bs, sector_num, nb_sectors, qiov); } if (ret == 0 && !bs->enable_write_cache) { ret = bdrv_co_flush(bs); } bdrv_set_dirty(bs, sector_num, nb_sectors); if (bs->wr_highest_sector < sector_num + nb_sectors - 1) { bs->wr_highest_sector = sector_num + nb_sectors - 1; } if (bs->growable && ret >= 0) { bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors); } return ret; }