diff options
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 4d6666d3ff..a97f7b431a 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -5925,6 +5925,42 @@ void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset, s->signaled_corruption = true; } +#ifdef CONFIG_BDRV_CLUSTER_INFO +int qcow2_get_cluster_info(BlockDriverState *bs, uint64_t offset) +{ + BDRVQcow2State *s = bs->opaque; + uint64_t host_offset; + uint64_t coffset; + unsigned int bytes; + QCow2SubclusterType type; + int ret = 0, csize, nb_csectors; + + /* only get information for one byte */ + bytes = 1; + + ret = qcow2_get_host_offset(bs, offset, &bytes, &host_offset, &type); + if (ret < 0) { + return ret; + } + + printf("cluster type: %s\n", qcow2_get_subcluster_name(type)); + printf("cluster offset host: %ld\n", host_offset); + printf("cluster offset guest: %ld\n", offset); + printf("cluster offset in-cluster: %ld\n", offset_into_cluster(s, offset)); + + if (type == QCOW2_SUBCLUSTER_COMPRESSED) { + qcow2_parse_compressed_l2_entry(bs, host_offset, &coffset, &csize); + nb_csectors = ((host_offset >> s->csize_shift) & s->csize_mask) + 1; + + printf("cluster compressed offset: %ld\n", coffset); + printf("cluster compressed sectors: %d\n", nb_csectors); + printf("cluster compressed size: %d\n", csize); + } + + return ret; +} +#endif + #define QCOW_COMMON_OPTIONS \ { \ .name = BLOCK_OPT_SIZE, \ @@ -6108,6 +6144,10 @@ BlockDriver bdrv_qcow2 = { .bdrv_co_can_store_new_dirty_bitmap = qcow2_co_can_store_new_dirty_bitmap, .bdrv_co_remove_persistent_dirty_bitmap = qcow2_co_remove_persistent_dirty_bitmap, + +#ifdef CONFIG_BDRV_CLUSTER_INFO + .bdrv_get_cluster_info = qcow2_get_cluster_info, +#endif }; static void bdrv_qcow2_init(void) |