diff options
| author | Alberto Garcia <berto@igalia.com> | 2020-09-11 16:09:41 +0200 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2020-09-15 11:30:36 +0200 |
| commit | 8e958260c5a562f3be08beef2055975c04836200 (patch) | |
| tree | 285ff3263c213a71f082f2907f6b36a815a104c5 /block/qcow2.c | |
| parent | c1dadda02ca62823d5ee21dc6435d593c3993d32 (diff) | |
qcow2: Make preallocate_co() resize the image to the correct size
This function preallocates metadata structures and then extends the
image to its new size, but that new size calculation is wrong because
it doesn't take into account that the host_offset variable is always
cluster-aligned.
This problem can be reproduced with preallocation=metadata when the
original size is not cluster-aligned but the new size is. In this case
the final image size will be shorter than expected.
qemu-img create -f qcow2 img.qcow2 31k
qemu-img resize --preallocation=metadata img.qcow2 128k
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-Id: <adeb8b059917b141d5f5b3bd2a016262d3052c79.1599833007.git.berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
[mreitz: Mark compat=0.10 unsupported for iotest 125]
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 77c43ce178..1cb5daf39a 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3135,6 +3135,7 @@ static int coroutine_fn preallocate_co(BlockDriverState *bs, uint64_t offset, error_setg_errno(errp, -ret, "Allocating clusters failed"); goto out; } + host_offset += offset_into_cluster(s, offset); for (m = meta; m != NULL; m = m->next) { m->prealloc = true; |