bs->is_temporary = 0;
bs->encrypted = 0;
bs->valid_key = 0;
+ /* buffer_alignment defaulted to 512, drivers can change this value */
+ bs->buffer_alignment = 512;
if (flags & BDRV_O_SNAPSHOT) {
BlockDriverState *bs1;
len = bdrv_getlength(bs);
- if ((offset + size) > len)
+ if (offset < 0)
+ return -EIO;
+
+ if ((offset > len) || (len - offset < size))
return -EIO;
return 0;
return -ENOMEDIUM;
if (!drv->bdrv_write_compressed)
return -ENOTSUP;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return -EIO;
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
}
acb = qemu_aio_get(bs, cb, opaque);
acb->is_write = is_write;
acb->qiov = qiov;
- acb->bounce = qemu_memalign(512, qiov->size);
+ acb->bounce = qemu_blockalign(bs, qiov->size);
if (!acb->bh)
acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb);
return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque);
return NULL;
}
+
+void *qemu_blockalign(BlockDriverState *bs, size_t size)
+{
+ return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size);
+}