From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:55471) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SuM3L-0000OM-U5 for qemu-devel@nongnu.org; Thu, 26 Jul 2012 07:16:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SuM3C-0003cV-BY for qemu-devel@nongnu.org; Thu, 26 Jul 2012 07:16:23 -0400 Received: from mail-wi0-f169.google.com ([209.85.212.169]:61996) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SuM3C-0003cJ-5J for qemu-devel@nongnu.org; Thu, 26 Jul 2012 07:16:14 -0400 Received: by wibhm2 with SMTP id hm2so5247912wib.4 for ; Thu, 26 Jul 2012 04:16:13 -0700 (PDT) From: benoit.canet@gmail.com Date: Thu, 26 Jul 2012 13:16:04 +0200 Message-Id: <1343301366-18028-2-git-send-email-benoit@irqsave.net> In-Reply-To: <1343301366-18028-1-git-send-email-benoit@irqsave.net> References: <1343301366-18028-1-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 V4 1/3] block: create bdrv_get_backing_file_depth() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , lcapitulino@redhat.com, pbonzini@redhat.com, eblake@redhat.com, stefanha@linux.vnet.ibm.com From: Benoît Canet Create bdrv_get_backing_file_depth() 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..22ebe49 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_depth(BlockDriverState *bs) +{ + if (!bs->drv) { + return 0; + } + + if (!bs->backing_hd) { + return 0; + } + + return 1 + bdrv_get_backing_file_depth(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..650d872 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_depth(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