diff options
| -rw-r--r-- | block/qcow2-refcount.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index f714ca2..917fc88 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -1065,9 +1065,21 @@ int qcow2_check_refcounts(BlockDriverState *bs) for(i = 0; i < s->refcount_table_size; i++) { int64_t offset; offset = s->refcount_table[i]; + + /* Refcount blocks are cluster aligned */ + if (offset & (s->cluster_size - 1)) { + fprintf(stderr, "ERROR refcount block %d is not " + "cluster aligned; refcount table entry corrupted\n", i); + errors++; + } + if (offset != 0) { errors += inc_refcounts(bs, refcount_table, nb_clusters, offset, s->cluster_size); + if (refcount_table[offset / s->cluster_size] != 1) { + fprintf(stderr, "ERROR refcount block %d refcount=%d\n", + i, refcount_table[offset / s->cluster_size]); + } } } |