From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40645) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3L9l-00041E-NF for qemu-devel@nongnu.org; Wed, 26 Apr 2017 07:30:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3L9i-0002Gy-4i for qemu-devel@nongnu.org; Wed, 26 Apr 2017 07:30:49 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:37995 helo=relay.sw.ru) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3L9h-0002DQ-J2 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 07:30:46 -0400 From: Vladimir Sementsov-Ogievskiy Date: Wed, 26 Apr 2017 14:30:33 +0300 Message-Id: <20170426113038.60044-20-vsementsov@virtuozzo.com> In-Reply-To: <20170426113038.60044-1-vsementsov@virtuozzo.com> References: <20170426113038.60044-1-vsementsov@virtuozzo.com> Subject: [Qemu-devel] [PATCH 19/24] qmp: add x-debug-block-dirty-bitmap-sha256 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org, qemu-devel@nongnu.org Cc: kwolf@redhat.com, mreitz@redhat.com, armbru@redhat.com, eblake@redhat.com, jsnow@redhat.com, famz@redhat.com, den@openvz.org, stefanha@redhat.com, vsementsov@virtuozzo.com, pbonzini@redhat.com Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Reviewed-by: John Snow --- block/dirty-bitmap.c | 5 +++++ blockdev.c | 29 +++++++++++++++++++++++++++++ include/block/dirty-bitmap.h | 2 ++ include/qemu/hbitmap.h | 8 ++++++++ qapi/block-core.json | 27 +++++++++++++++++++++++++++ tests/Makefile.include | 2 +- util/hbitmap.c | 11 +++++++++++ 7 files changed, 83 insertions(+), 1 deletion(-) diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 9208844a7d..b684d8b00e 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -588,3 +588,8 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BlockDriverState *bs, return bitmap == NULL ? QLIST_FIRST(&bs->dirty_bitmaps) : QLIST_NEXT(bitmap, list); } + +char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp) +{ + return hbitmap_sha256(bitmap->bitmap, errp); +} diff --git a/blockdev.c b/blockdev.c index e32ac69e4b..c41b791289 100644 --- a/blockdev.c +++ b/blockdev.c @@ -2820,6 +2820,35 @@ void qmp_block_dirty_bitmap_clear(const char *node, const char *name, aio_context_release(aio_context); } +BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node, + const char *name, + Error **errp) +{ + AioContext *aio_context; + BdrvDirtyBitmap *bitmap; + BlockDriverState *bs; + BlockDirtyBitmapSha256 *ret = NULL; + char *sha256; + + bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp); + if (!bitmap || !bs) { + return NULL; + } + + sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp); + if (sha256 == NULL) { + goto out; + } + + ret = g_new(BlockDirtyBitmapSha256, 1); + ret->sha256 = sha256; + +out: + aio_context_release(aio_context); + + return ret; +} + void hmp_drive_del(Monitor *mon, const QDict *qdict) { const char *id = qdict_get_str(qdict, "id"); diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index d71edc4d13..b022b34964 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -86,4 +86,6 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BlockDriverState *bs, bool bdrv_has_persistent_bitmaps(BlockDriverState *bs); +char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp); + #endif diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h index b52304ac29..d3a74a21fc 100644 --- a/include/qemu/hbitmap.h +++ b/include/qemu/hbitmap.h @@ -253,6 +253,14 @@ void hbitmap_deserialize_ones(HBitmap *hb, uint64_t start, uint64_t count, void hbitmap_deserialize_finish(HBitmap *hb); /** + * hbitmap_sha256: + * @bitmap: HBitmap to operate on. + * + * Returns SHA256 hash of the last level. + */ +char *hbitmap_sha256(const HBitmap *bitmap, Error **errp); + +/** * hbitmap_free: * @hb: HBitmap to operate on. * diff --git a/qapi/block-core.json b/qapi/block-core.json index 09dcf4e6ae..d6f173448a 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1642,6 +1642,33 @@ 'data': 'BlockDirtyBitmap' } ## +# @BlockDirtyBitmapSha256: +# +# SHA256 hash of dirty bitmap data +# +# @sha256: ASCII representation of SHA256 bitmap hash +# +# Since: 2.9 +## + { 'struct': 'BlockDirtyBitmapSha256', + 'data': {'sha256': 'str'} } + +## +# @x-debug-block-dirty-bitmap-sha256: +# +# Get bitmap SHA256 +# +# Returns: BlockDirtyBitmapSha256 on success +# If @node is not a valid block device, DeviceNotFound +# If @name is not found or if hashing has failed, GenericError with an +# explanation +# +# Since: 2.9 +## + { 'command': 'x-debug-block-dirty-bitmap-sha256', + 'data': 'BlockDirtyBitmap', 'returns': 'BlockDirtyBitmapSha256' } + +## # @blockdev-mirror: # # Start mirroring a block device's writes to a new destination. diff --git a/tests/Makefile.include b/tests/Makefile.include index ad35a6494b..d0809fefb2 100644 --- a/tests/Makefile.include +++ b/tests/Makefile.include @@ -519,7 +519,7 @@ tests/test-blockjob$(EXESUF): tests/test-blockjob.o $(test-block-obj-y) $(test-u tests/test-blockjob-txn$(EXESUF): tests/test-blockjob-txn.o $(test-block-obj-y) $(test-util-obj-y) tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(test-block-obj-y) tests/test-iov$(EXESUF): tests/test-iov.o $(test-util-obj-y) -tests/test-hbitmap$(EXESUF): tests/test-hbitmap.o $(test-util-obj-y) +tests/test-hbitmap$(EXESUF): tests/test-hbitmap.o $(test-util-obj-y) $(test-crypto-obj-y) tests/test-x86-cpuid$(EXESUF): tests/test-x86-cpuid.o tests/test-xbzrle$(EXESUF): tests/test-xbzrle.o migration/xbzrle.o page_cache.o $(test-util-obj-y) tests/test-cutils$(EXESUF): tests/test-cutils.o util/cutils.o diff --git a/util/hbitmap.c b/util/hbitmap.c index 0c1591a594..21535cc90b 100644 --- a/util/hbitmap.c +++ b/util/hbitmap.c @@ -13,6 +13,7 @@ #include "qemu/hbitmap.h" #include "qemu/host-utils.h" #include "trace.h" +#include "crypto/hash.h" /* HBitmaps provides an array of bits. The bits are stored as usual in an * array of unsigned longs, but HBitmap is also optimized to provide fast @@ -727,3 +728,13 @@ void hbitmap_free_meta(HBitmap *hb) hbitmap_free(hb->meta); hb->meta = NULL; } + +char *hbitmap_sha256(const HBitmap *bitmap, Error **errp) +{ + size_t size = bitmap->sizes[HBITMAP_LEVELS - 1] * sizeof(unsigned long); + char *data = (char *)bitmap->levels[HBITMAP_LEVELS - 1]; + char *hash = NULL; + qcrypto_hash_digest(QCRYPTO_HASH_ALG_SHA256, data, size, &hash, errp); + + return hash; +} -- 2.11.1