From patchwork Thu Aug 2 08:22:47 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benoit Canet X-Patchwork-Id: 174699 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 3A4752C0088 for ; Thu, 2 Aug 2012 18:23:20 +1000 (EST) Received: from localhost ([::1]:55946 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Swqgg-0006or-9X for incoming@patchwork.ozlabs.org; Thu, 02 Aug 2012 04:23:18 -0400 Received: from eggs.gnu.org ([208.118.235.92]:33684) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SwqgQ-0006Vg-Mi for qemu-devel@nongnu.org; Thu, 02 Aug 2012 04:23:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SwqgK-0002TM-Qs for qemu-devel@nongnu.org; Thu, 02 Aug 2012 04:23:02 -0400 Received: from mail-wg0-f41.google.com ([74.125.82.41]:39958) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SwqgK-0002T3-KS for qemu-devel@nongnu.org; Thu, 02 Aug 2012 04:22:56 -0400 Received: by wgbds1 with SMTP id ds1so4946141wgb.4 for ; Thu, 02 Aug 2012 01:22:55 -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; bh=ow6F4Le8YvHvPN9j7NeA68bhgg1jl8JmEslpJg17H90=; b=xULZbd+k76QriKvtlISxk4q5ayYpFcQyDlJmjfmFioAzqKYRZeTg63bBpABg1o8l1g NVwDS/UCOagrvASvrPI3e8ocYPaRtUq5FlkghllyAVYdF5g/53xMhndruPw2Qmr4fwVo WND4Tqkjp3pIwOe24Iedb/bgQwWIJc3C0cv5YQclJdoQpmYORqapa2zY5lG/xJhG8HAM Z2lBvwx3bcFSLsSUBkKeymPfhZflHPPpAqUVVK7PrBAiNIXCnI2b3M/UkMQN2nwl3CGj cJBQdV4+QVJNMmtvI7eP0Xk7KCWaQBkUwQS8Q1tynxXqttYqxby+VSN6OpWMgbz7ckSK waTA== Received: by 10.216.138.92 with SMTP id z70mr9886958wei.68.1343895775762; Thu, 02 Aug 2012 01:22:55 -0700 (PDT) Received: from Laure.box.in.irqsave.net (paradis.irqsave.net. [109.190.18.76]) by mx.google.com with ESMTPS id ck9sm15545082wib.2.2012.08.02.01.22.54 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 02 Aug 2012 01:22:55 -0700 (PDT) From: "=?UTF-8?q?Beno=C3=AEt=20Canet?=" To: qemu-devel@nongnu.org Date: Thu, 2 Aug 2012 10:22:47 +0200 Message-Id: <1343895769-21255-2-git-send-email-benoit@irqsave.net> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1343895769-21255-1-git-send-email-benoit@irqsave.net> References: <1343895769-21255-1-git-send-email-benoit@irqsave.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 74.125.82.41 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 Subject: [Qemu-devel] [PATCH V6 1/3] block: create bdrv_get_backing_file_depth() 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 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);