static void inc_refcounts(BlockDriverState *bs, BdrvCheckResult *res, uint16_t *refcount_table, int refcount_table_size, int64_t offset, int64_t size) { BDRVQcowState *s = bs->opaque; uint64_t start, last, cluster_offset, k; if (size <= 0) return; start = start_of_cluster(s, offset); last = start_of_cluster(s, offset + size - 1); for(cluster_offset = start; cluster_offset <= last; cluster_offset += s->cluster_size) { k = cluster_offset >> s->cluster_bits; if (k >= refcount_table_size) { fprintf(stderr, "Warning: cluster offset=0x%" PRIx64 " is after " "the end of the image file, can't properly check refcounts.\n", cluster_offset); res->check_errors++; } else { if (++refcount_table[k] == 0) { fprintf(stderr, "ERROR: overflow cluster offset=0x%" PRIx64 "\n", cluster_offset); res->corruptions++; } } } }