From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:35873) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Su0p2-00080b-Rw for qemu-devel@nongnu.org; Wed, 25 Jul 2012 08:36:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Su0p1-0002vA-RK for qemu-devel@nongnu.org; Wed, 25 Jul 2012 08:36:12 -0400 Received: from mail-bk0-f45.google.com ([209.85.214.45]:44679) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Su0p1-0002us-KM for qemu-devel@nongnu.org; Wed, 25 Jul 2012 08:36:11 -0400 Received: by mail-bk0-f45.google.com with SMTP id ji1so395370bkc.4 for ; Wed, 25 Jul 2012 05:36:11 -0700 (PDT) From: benoit.canet@gmail.com Date: Wed, 25 Jul 2012 14:36:03 +0200 Message-Id: <1343219765-12297-2-git-send-email-benoit@irqsave.net> In-Reply-To: <1343219765-12297-1-git-send-email-benoit@irqsave.net> References: <1343219765-12297-1-git-send-email-benoit@irqsave.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH V3 1/3] block: create bdrv_get_backing_file_ancestors_count() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, stefanha@gmail.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@linux.vnet.ibm.com, pbonzini@redhat.com From: Benoît Canet Create bdrv_get_backing_file_ancestors_count() in order to be able to show in QMP and HMP how many ancestors backing an image a block device have. Signed-off-by: Benoit Canet --- block.c | 13 +++++++++++++ block.h | 1 + 2 files changed, 14 insertions(+) diff --git a/block.c b/block.c index ce7eb8f..03e0860 100644 --- a/block.c +++ b/block.c @@ -2754,6 +2754,19 @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, return NULL; } +int bdrv_get_backing_file_ancestors_count(BlockDriverState *bs) +{ + if (!bs->drv) { + return 0; + } + + if (!bs->backing_hd) { + return 0; + } + + return 1 + bdrv_get_backing_file_ancestors_count(bs->backing_hd); +} + #define NB_SUFFIXES 4 char *get_human_readable_size(char *buf, int buf_size, int64_t size) diff --git a/block.h b/block.h index c89590d..5b1ba2b 100644 --- a/block.h +++ b/block.h @@ -174,6 +174,7 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top, int nb_sectors, int *pnum); BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, const char *backing_file); +int bdrv_get_backing_file_ancestors_count(BlockDriverState *bs); int bdrv_truncate(BlockDriverState *bs, int64_t offset); int64_t bdrv_getlength(BlockDriverState *bs); int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); -- 1.7.9.5