static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) { SheepdogAIOCB acb; int ret; int64_t offset = (sector_num + nb_sectors) * BDRV_SECTOR_SIZE; BDRVSheepdogState *s = bs->opaque; if (offset > s->inode.vdi_size) { ret = sd_truncate(bs, offset); if (ret < 0) { return ret; } } sd_aio_setup(&acb, s, qiov, sector_num, nb_sectors, AIOCB_WRITE_UDATA); retry: if (check_overlapping_aiocb(s, &acb)) { qemu_co_queue_wait(&s->overlapping_queue); goto retry; } sd_co_rw_vector(&acb); sd_write_done(&acb); QLIST_REMOVE(&acb, aiocb_siblings); qemu_co_queue_restart_all(&s->overlapping_queue); return acb.ret; }