C++ (Cpp) trace_virtio_blk_handle_write示例

示例#1

文件： virtio-blk.c 项目： Samsara00/qemu

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);

    bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE);

    trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512);

    if (sector & req->dev->sector_mask) {
        virtio_blk_rw_complete(req, -EIO);
        return;
    }
    if (req->qiov.size % req->dev->conf->logical_block_size) {
        virtio_blk_rw_complete(req, -EIO);
        return;
    }

    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++;
}

示例#2

文件： virtio-blk.c 项目： dtatulea/qemu

static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb)
{
    BlockRequest *blkreq;
    uint64_t sector;

    sector = ldq_p(&req->out->sector);

    trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512);

    if (sector & req->dev->sector_mask) {
        virtio_blk_rw_complete(req, -EIO);
        return;
    }

    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++;
}

示例#3

文件： virtio-blk.c 项目： mithleshvrts/qemu-kvm-rhel6

static void virtio_blk_handle_write(BlockRequest *blkreq, int *num_writes,
    VirtIOBlockReq *req, BlockDriverState **old_bs)
{
    trace_virtio_blk_handle_write(req, req->out->sector, req->qiov.size / 512);

    bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE);

    if (req->out->sector & req->dev->sector_mask) {
        virtio_blk_rw_complete(req, -EIO);
        return;
    }

    if (req->dev->bs != *old_bs || *num_writes == 32) {
        if (*old_bs != NULL) {
            do_multiwrite(*old_bs, blkreq, *num_writes);
        }
        *num_writes = 0;
        *old_bs = req->dev->bs;
    }
    if (req->qiov.size % req->dev->conf->logical_block_size) {
        virtio_blk_rw_complete(req, -EIO);
        return;
    }

    blkreq[*num_writes].sector = req->out->sector;
    blkreq[*num_writes].nb_sectors = req->qiov.size / 512;
    blkreq[*num_writes].qiov = &req->qiov;
    blkreq[*num_writes].cb = virtio_blk_rw_complete;
    blkreq[*num_writes].opaque = req;
    blkreq[*num_writes].error = 0;

    (*num_writes)++;
}