144     } else if (!bdrv->bdrv_read) {  in bdrv_register()
146         bdrv->bdrv_read = bdrv_read_em;  in bdrv_register()
801             if (bdrv_read(bs, sector, buf, n) != 0) {  in bdrv_commit()
906 int bdrv_read(BlockDriverState *bs, int64_t sector_num,  in bdrv_read()  function
916     return drv->bdrv_read(bs, sector_num, buf, nb_sectors);  in bdrv_read()
990         if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0)  in bdrv_pread()
1003         if ((ret = bdrv_read(bs, sector_num, buf, nb_sectors)) < 0)  in bdrv_pread()
1013         if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0)  in bdrv_pread()
1035         if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0)  in bdrv_pwrite()
1060         if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0)  in bdrv_pwrite()
1182     ret = bdrv_read(bs, 0, buf, 1);  in guess_disk_lchs()
2342         acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors);  in bdrv_aio_rw_vector()