Reviewed-by: John Snow <js...@redhat.com> Reviewed-by: Eric Blake <ebl...@redhat.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> --- block/dirty-bitmap.c | 1 + include/qemu/hbitmap.h | 8 ++++++++ qapi/block-core.json | 5 ++++- util/hbitmap.c | 8 ++++++++ 4 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 88d7967..e68c177 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -287,6 +287,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs) info->has_name = !!bm->name; info->name = g_strdup(bm->name); info->status = bdrv_dirty_bitmap_status(bm); + info->md5 = hbitmap_md5(bm->bitmap); entry->value = info; *plist = entry; plist = &entry->next; diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h index e29188c..6d1da4d 100644 --- a/include/qemu/hbitmap.h +++ b/include/qemu/hbitmap.h @@ -146,6 +146,14 @@ void hbitmap_reset_all(HBitmap *hb); bool hbitmap_get(const HBitmap *hb, uint64_t item); /** + * hbitmap_md5: + * @bitmap: HBitmap to operate on. + * + * Returns md5 checksum of the last level. + */ +char *hbitmap_md5(const HBitmap *bitmap); + +/** * hbitmap_free: * @hb: HBitmap to operate on. * diff --git a/qapi/block-core.json b/qapi/block-core.json index 9bf1b22..11b0aed 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -414,11 +414,14 @@ # # @status: current status of the dirty bitmap (since 2.4) # +# @md5: md5 checksum (as a hexadecimal string) of the last bitmap level +# (since 2.6) +# # Since: 1.3 ## { 'struct': 'BlockDirtyInfo', 'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32', - 'status': 'DirtyBitmapStatus'} } + 'status': 'DirtyBitmapStatus', 'md5': 'str'} } ## # @BlockInfo: diff --git a/util/hbitmap.c b/util/hbitmap.c index b22b87d..28595fb 100644 --- a/util/hbitmap.c +++ b/util/hbitmap.c @@ -491,3 +491,11 @@ bool hbitmap_merge(HBitmap *a, const HBitmap *b) return true; } + +char *hbitmap_md5(const HBitmap *bitmap) +{ + uint64_t size = + MAX((bitmap->size + BITS_PER_LONG - 1) >> BITS_PER_LEVEL, 1); + const guchar *data = (const guchar *)bitmap->levels[HBITMAP_LEVELS - 1]; + return g_compute_checksum_for_data(G_CHECKSUM_MD5, data, size); +} -- 1.8.3.1