diff options
| -rw-r--r-- | block/qcow2.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 67e55c9667..b0faa6917b 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1020,11 +1020,20 @@ static coroutine_fn int qcow2_co_readv(BlockDriverState *bs, int64_t sector_num, n1 = qcow2_backing_read1(bs->backing_hd, &hd_qiov, sector_num, cur_nr_sectors); if (n1 > 0) { + QEMUIOVector local_qiov; + + qemu_iovec_init(&local_qiov, hd_qiov.niov); + qemu_iovec_concat(&local_qiov, &hd_qiov, 0, + n1 * BDRV_SECTOR_SIZE); + BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); qemu_co_mutex_unlock(&s->lock); ret = bdrv_co_readv(bs->backing_hd, sector_num, - n1, &hd_qiov); + n1, &local_qiov); qemu_co_mutex_lock(&s->lock); + + qemu_iovec_destroy(&local_qiov); + if (ret < 0) { goto fail; } |