From patchwork Wed Jul 25 08:11:39 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Benoit Canet X-Patchwork-Id: 173122 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 766EB2C008D for ; Wed, 25 Jul 2012 18:12:43 +1000 (EST) Received: from localhost ([::1]:35933 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Stwi1-0002jV-BY for incoming@patchwork.ozlabs.org; Wed, 25 Jul 2012 04:12:41 -0400 Received: from eggs.gnu.org ([208.118.235.92]:39138) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1StwhM-0001EL-3m for qemu-devel@nongnu.org; Wed, 25 Jul 2012 04:12:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1StwhF-0006Sv-0w for qemu-devel@nongnu.org; Wed, 25 Jul 2012 04:12:00 -0400 Received: from mail-wi0-f181.google.com ([209.85.212.181]:44276) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1StwhE-0006Sk-R9 for qemu-devel@nongnu.org; Wed, 25 Jul 2012 04:11:52 -0400 Received: by wibhm2 with SMTP id hm2so338384wib.10 for ; Wed, 25 Jul 2012 01:11:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=jdSe6NeQCMwNDmrFipBbJH2mBGQk0Nm9bsrLQaAFMoY=; b=Hu0xHj5aEQ5fUWi2AUgOe7gazxh1as7Nfp0TSyu8B62bhACGUIgs9CiuelY2Bj/960 iYfySkL1ehAqSFuoDfjDizwekchKSS0yzuyFz4uakDzTPv8VPubW1cOrKHUbAdFp33uL rIvbrx/nXWf5zPc7lyd5RulkyY5qN1jRFkbW2zYxg99JmcV+JQVq8ATGHScY+YLrkayg Hxn35wngQwEif/4wu4cKoy9ZFyCdZAE2EEbFxSAOOv3+zcJkvMYe7ZHDBukxqEY5bZoO SIKuzhYQdURJKsK7vX64dIR4ZI7qXhM5JtTM8BC2U9PWTTJyzdi8K0nE1PJXdR7gq1At qtdw== Received: by 10.180.79.69 with SMTP id h5mr2392083wix.6.1343203912109; Wed, 25 Jul 2012 01:11:52 -0700 (PDT) Received: from Laure.box.in.irqsave.net (paradis.irqsave.net. [109.190.18.76]) by mx.google.com with ESMTPS id h9sm1420017wiz.1.2012.07.25.01.11.50 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 25 Jul 2012 01:11:51 -0700 (PDT) From: benoit.canet@gmail.com To: qemu-devel@nongnu.org Date: Wed, 25 Jul 2012 10:11:39 +0200 Message-Id: <1343203902-10524-2-git-send-email-benoit@irqsave.net> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1343203902-10524-1-git-send-email-benoit@irqsave.net> References: <1343203902-10524-1-git-send-email-benoit@irqsave.net> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.212.181 Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@gmail.com, lcapitulino@redhat.com, pbonzini@redhat.com, stefanha@linux.vnet.ibm.com Subject: [Qemu-devel] [PATCH V2 1/3] block: create bdrv_get_backing_file_ancestors_count() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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);