int bdrv_write(BlockDriverState *bs, int64_t sector_num,

               const uint8_t *buf, int nb_sectors)

{

    BlockDriver *drv = bs->drv;

    if (!bs->drv)

        return -ENOMEDIUM;

    if (bs->read_only)

        return -EACCES;

    if (bdrv_check_request(bs, sector_num, nb_sectors))

        return -EIO;



    return drv->bdrv_write(bs, sector_num, buf, nb_sectors);

}

int bdrv_write(BlockDriverState *bs, int64_t sector_num,

               const uint8_t *buf, int nb_sectors)

{

    BlockDriver *drv = bs->drv;

    if (!bs->drv)

        return -ENOMEDIUM;

    if (bs->read_only)

        return -EACCES;

    if (bdrv_check_request(bs, sector_num, nb_sectors))

        return -EIO;



    return drv->bdrv_write(bs, sector_num, buf, nb_sectors);

}

int FUNC_0(BlockDriverState *VAR_0, int64_t VAR_1,

               const uint8_t *VAR_2, int VAR_3)

{

    BlockDriver *drv = VAR_0->drv;

    if (!VAR_0->drv)

        return -ENOMEDIUM;

    if (VAR_0->read_only)

        return -EACCES;

    if (bdrv_check_request(VAR_0, VAR_1, VAR_3))

        return -EIO;



    return drv->FUNC_0(VAR_0, VAR_1, VAR_2, VAR_3);

}

int FUNC_0(BlockDriverState *VAR_0, int64_t VAR_1,
const uint8_t *VAR_2, int VAR_3)
{ BlockDriver *drv = VAR_0->drv; if (!VAR_0->drv)
return -ENOMEDIUM; if (VAR_0->read_only)
return -EACCES; if (bdrv_check_request(VAR_0, VAR_1, VAR_3))
return -EIO; return drv->FUNC_0(VAR_0, VAR_1, VAR_2, VAR_3); }