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block/stream: use buffer-based io

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Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2019-04-22 17:58:37 +03:00 committed by Kevin Wolf
parent 08b6261f34
commit f4326aefcf
1 changed files with 1 additions and 3 deletions
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4
block/stream.c
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@ -42,12 +42,10 @@ static int coroutine_fn stream_populate(BlockBackend *blk,
int64_t offset, uint64_t bytes,
void *buf)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
assert(bytes < SIZE_MAX);
/* Copy-on-read the unallocated clusters */
return blk_co_preadv(blk, offset, qiov.size, &qiov, BDRV_REQ_COPY_ON_READ);
return blk_co_pread(blk, offset, bytes, buf, BDRV_REQ_COPY_ON_READ);
}
static void stream_abort(Job *job)