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qcow2: Tighten cluster_offset alignment assertions 

qcow2_alloc_cluster_offset() and qcow2_get_cluster_offset() always
return offsets that are cluster-aligned so don't just check that they
are sector-aligned.

The check in qcow2_co_preadv_task() is also replaced by an assertion
for the same reason.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 558ba339965f858bede4c73ce3f50f0c0493597d.1579374329.git.berto@igalia.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Alberto Garcia 2020-01-18 20:09:27 +01:00 committed by Max Reitz
parent ef97d608c7
commit 344ffea951
1 changed files with 3 additions and 6 deletions
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9
block/qcow2.c
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@ -2167,10 +2167,7 @@ static coroutine_fn int qcow2_co_preadv_task(BlockDriverState *bs,
offset, bytes, qiov, qiov_offset);
case QCOW2_CLUSTER_NORMAL:
if ((file_cluster_offset & 511) != 0) {
return -EIO;
}
assert(offset_into_cluster(s, file_cluster_offset) == 0);
if (bs->encrypted) {
return qcow2_co_preadv_encrypted(bs, file_cluster_offset,
offset, bytes, qiov, qiov_offset);
@ -2506,7 +2503,7 @@ static coroutine_fn int qcow2_co_pwritev_part(
goto out_locked;
}
assert((cluster_offset & 511) == 0);
assert(offset_into_cluster(s, cluster_offset) == 0);
ret = qcow2_pre_write_overlap_check(bs, 0,
cluster_offset + offset_in_cluster,
@ -3896,7 +3893,7 @@ qcow2_co_copy_range_to(BlockDriverState *bs,
goto fail;
}
assert((cluster_offset & 511) == 0);
assert(offset_into_cluster(s, cluster_offset) == 0);
ret = qcow2_pre_write_overlap_check(bs, 0,
cluster_offset + offset_in_cluster, cur_bytes, true);