This function iterates over all snapshots of a qcow2 file in order to
expand all zero clusters, but it does not validate the snapshots' L1
tables first.
We now have a function to take care of this, so let's use it.
We can also take the opportunity to replace the sector-based
bdrv_read() with bdrv_pread().
Signed-off-by: Alberto Garcia <address@hidden>
Cc: Eric Blake <address@hidden>
---
block/qcow2-cluster.c | 24 +++++++++++++++++-------
tests/qemu-iotests/080 | 2 ++
tests/qemu-iotests/080.out | 4 ++++
3 files changed, 23 insertions(+), 7 deletions(-)