static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) { BlockRequest *blkreq; uint64_t sector; sector = virtio_ldq_p(VIRTIO_DEVICE(req->dev), &req->out.sector); trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512); if (!virtio_blk_sect_range_ok(req->dev, sector, req->qiov.size)) { virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); virtio_blk_free_request(req); return; } block_acct_start(bdrv_get_stats(req->dev->bs), &req->acct, req->qiov.size, BLOCK_ACCT_WRITE); if (mrb->num_writes == 32) { virtio_submit_multiwrite(req->dev->bs, mrb); } blkreq = &mrb->blkreq[mrb->num_writes]; blkreq->sector = sector; blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; blkreq->qiov = &req->qiov; blkreq->cb = virtio_blk_rw_complete; blkreq->opaque = req; blkreq->error = 0; mrb->num_writes++; }
static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) { BlockRequest *blkreq; uint64_t sector; sector = virtio_ldq_p(VIRTIO_DEVICE(req->dev), &req->out.sector); trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512); if (!virtio_blk_sect_range_ok(req->dev, sector, req->qiov.size)) { virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); virtio_blk_free_request(req); return; } block_acct_start(bdrv_get_stats(req->dev->bs), &req->acct, req->qiov.size, BLOCK_ACCT_WRITE); if (mrb->num_writes == 32) { virtio_submit_multiwrite(req->dev->bs, mrb); } blkreq = &mrb->blkreq[mrb->num_writes]; blkreq->sector = sector; blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; blkreq->qiov = &req->qiov; blkreq->cb = virtio_blk_rw_complete; blkreq->opaque = req; blkreq->error = 0; mrb->num_writes++; }