From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23FDEC433F5 for ; Mon, 28 Mar 2022 11:19:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240636AbiC1LVO (ORCPT ); Mon, 28 Mar 2022 07:21:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240607AbiC1LU2 (ORCPT ); Mon, 28 Mar 2022 07:20:28 -0400 Received: from mail-lf1-x132.google.com (mail-lf1-x132.google.com [IPv6:2a00:1450:4864:20::132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB02D55763 for ; Mon, 28 Mar 2022 04:18:44 -0700 (PDT) Received: by mail-lf1-x132.google.com with SMTP id p15so24085543lfk.8 for ; Mon, 28 Mar 2022 04:18:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=openvz-org.20210112.gappssmtp.com; s=20210112; h=subject:from:to:date:message-id:in-reply-to:references:user-agent :mime-version:content-transfer-encoding; bh=N926ipqlEwj4JO1xTcsrXgCa3AA/3fWt5Bm+xv75a5E=; b=nz38DioMMu/o2OpQIzvPDjyYpPLI0nFTsULpn2HmsTcsJvQZ7J3CkBnphloPw/Ek/T 2CV+PcbPozG279+rNdUW64wR5Lus3yn2+g8JB1OkBnfK5htgoQWDS96xU71x8XM0aTQU sAcs5TpXaQsXWw/zxSInITGD+LUo1YTEVbGIXjV2kacYbDBhB4V77jA5kws+Pwmu0oB+ t4E9Z1LlRbV/W9IwBJE+V31v5+z4BE10KhA4+5wQxU0iqiSMFAVy+tuumRZ04PkQLUXF EsdqqJilrhiXX60X0ERWCPIGdY7mjYiH0a7Z+COTeBRi4Kyr5YoSxc9fHyqtCW19qww3 PTSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:from:to:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=N926ipqlEwj4JO1xTcsrXgCa3AA/3fWt5Bm+xv75a5E=; b=UiRv5OZx+ijkJGZXOovm2UIA1n3niGI4TwQ6mOgf7S4RxXLu0+xigkKo54gF89J7Pu 7yeSdcG1UVCHdZDy/sZiIRAzhZeU3P+6wfGKnAEqIvsekCqZcXwBDHeS30b3HIjoiMp6 xN6Wr/GctYPZ61ma4ygoq+v/k0mqLcpvtNlEHpvCZxYmcYA6m5V24hrtw/wXZ534+7rY wwIN6KV5ZkJlh3n4E/yuOLx0kQdVLelsL64O2aqBkZE5s2kodRd0r1ZAkUpRo1iI/iV/ fRFMCrg11a5eSVHFeSjjeryYqB86CZFkFLYm/bSAVvWrT3Sz3qLvp1k5Zz1TnFGbinzZ n4ow== X-Gm-Message-State: AOAM532vXBYErWKNCJL56gdXe+VbjOWj0ynZAgarJaKOjH+qVgnKqQj2 YnkwxpcrBE25NaerlJ9oEwpTUQVU4Bqp8+iX X-Google-Smtp-Source: ABdhPJwe/gX2NWrPoEuwfjHT3h0n/GqZ0JM31cCteh0vGnsgz/4AYMDMtb0HtiAGvAasyUXkJKGZ5w== X-Received: by 2002:ac2:43bb:0:b0:44a:1ee6:8c12 with SMTP id t27-20020ac243bb000000b0044a1ee68c12mr19628435lfl.683.1648466323220; Mon, 28 Mar 2022 04:18:43 -0700 (PDT) Received: from [127.0.1.1] ([2.92.192.17]) by smtp.gmail.com with ESMTPSA id t19-20020a199113000000b0044a2d7a1f4asm1601632lfd.206.2022.03.28.04.18.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Mar 2022 04:18:42 -0700 (PDT) Subject: [PATCH 4/4] dm-qcow2: Add helper for working with dm-qcow2 devices From: Kirill Tkhai To: agk@redhat.com, snitzer@redhat.com, dm-devel@redhat.com, song@kernel.org, linux-kernel@vger.kernel.org, khorenko@virtuozzo.com, kirill.tkhai@openvz.org Date: Mon, 28 Mar 2022 14:18:41 +0300 Message-ID: <164846632180.251310.3616379476259718920.stgit@pro> In-Reply-To: <164846619932.251310.3668540533992131988.stgit@pro> References: <164846619932.251310.3668540533992131988.stgit@pro> User-Agent: StGit/1.5 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This scripts allows to create and remove dm-qcow2 device, create internal snapshot, resize virtual device size, or check image consistency on live device. Signed-off-by: Kirill Tkhai --- scripts/qcow2-dm.sh | 249 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 249 insertions(+) create mode 100755 scripts/qcow2-dm.sh diff --git a/scripts/qcow2-dm.sh b/scripts/qcow2-dm.sh new file mode 100755 index 000000000000..7d9bda44c1d6 --- /dev/null +++ b/scripts/qcow2-dm.sh @@ -0,0 +1,249 @@ +#!/bin/bash +# +# This requires parameter dm_qcow2.kernel_sets_dirty_bit=y + +usage () { + cat < + $prog_name remove + $prog_name check [qemu-img check optional args] + $prog_name snapshot [qemu-img snapshot optional args] + $prog_name resize [qemu-img resize optional args] [+ | -]size +EOF +} + +get_img_size () { + sz=`qemu-img info -f qcow2 $1 | grep "virtual size" | sed 's/.*(\(.*\) bytes)/\1/'` + echo $sz +} + +get_nr_imgs () { + nr=`echo $1 | sed "s/.*qcow2 \(\w\) .*$/\1/"` + echo $nr +} + +get_dev_of_image () { + abs_path=$1 + + while read line; do + dev=`echo $line | sed "s/:.*//"` + nr_imgs=$(get_nr_imgs "$line") + top_img_id=$((nr_imgs - 1)) + + top_img_path=`dmsetup message $dev 0 get_img_name $top_img_id` + if [ -z "$top_img_path" ]; then + echo >&2 "Error during search of device"; exit 1; + return 1 + fi + + if [ "$abs_path" != "$top_img_path" ]; then + continue + fi + + echo $dev + return 0 + + done < <(LANG=C dmsetup table --target=qcow2 | grep -v "No devices found") + + return 0 +} + +create () { + if [ "$#" -ne 2 ]; then + echo >&2 "Wrong number of arguments."; usage; exit 1; + fi + + file=$1 + dev=$2 + files=() + fds="" + + qemu-img check $file || exit 1 + + disk_sz=$(get_img_size "$file") + echo disk_sz=$disk_sz + if [ -z "$disk_sz" ]; then + echo "Can't get disk size."; exit 1; + fi + + while :; do + if [ ! -f "$file" ]; then + echo "$file does not exist."; exit 1; + fi + + files+=("$file") + + exec {fd}<>$file || exit 1 + flock -x $fd || exit 1 + fds="$fd $fds" + + file=`qemu-img info $file | grep "backing file:" | sed "s/backing file: //"` + if [ -z "$file" ]; then + break + fi + done + + echo "Create device [$dev] of size $disk_sz from [${files[*]}]." + dmsetup create $dev --table "0 $((disk_sz / 512)) qcow2 ${fds}" +} + +reload_device () { + disk_sz=$(get_img_size "$abs_path") + if [ -z "$disk_sz" ]; then + echo "Can't get disk size."; return; + fi + + line=`dmsetup table $dev` + nr_imgs=$(get_nr_imgs "$line") + top_img_id=$((nr_imgs - 1)) + fds="" + + for id in `seq 0 $top_img_id`; + do + file=`dmsetup message $dev 0 get_img_name $id` + if [ -z "$file" ]; then + echo "Can't get image file."; return; + fi + exec {fd}<>$file || exit 1 + + fds="$fds $fd" + done + + echo "Reloading $dev." + dmsetup reload $dev --table "0 $((disk_sz / 512)) qcow2 ${fds}" +} + +remove () { + if [ "$#" -ne 1 ]; then + echo >&2 "Wrong number of arguments."; usage; exit 1; + fi + user_path=$1 + abs_path=`realpath $user_path` + + dev=$(get_dev_of_image "$abs_path") + if [ -z "$dev" ]; then + echo >&2 "Can't find device with [$user_path] top image."; exit 1 + fi + + echo "Removing device [$dev]." + dmsetup remove $dev + ret=$? + + if [ $ret -eq 0 ]; then + #Sanity check + echo "Checking [$abs_path]." + qemu-img check $abs_path + fi + exit $ret +} + +qemu_img () { + wants_reload=0 + if [ $1 == "--wants_reload" ]; then + wants_reload=1 + shift + fi + + if [ "$#" -lt 3 ]; then + echo >&2 "Wrong number of arguments."; usage; exit 1; + fi + + user_path=$1 + cmd=$2 + abs_path=`realpath $user_path` + qemu_img_args=${@: 2} + + dev=$(get_dev_of_image "$abs_path") + if [ -z "$dev" ]; then + echo >&2 "Can't find device by [$user_path]."; return 1 + fi + + echo "Suspending $dev." + dmsetup suspend $dev || exit 1 + + if [ "$cmd" != "check" ]; then + echo "Checking $abs_path" + qemu-img check $abs_path + ret=$? + if [ $ret -ne 0 ]; then + echo "Resuming $dev." + dmsetup resume $dev + exit 1 + fi + fi + + echo "===== Call: qemu-img $qemu_img_args. =====" + qemu-img $qemu_img_args + ret=$? + if [ $ret -ne 0 ]; then + echo >&2 "Failed during qemu-img call." + fi + echo "===== End of qemu-img $qemu_img_args. =====" + + if [ $wants_reload -ne 0 ]; then + reload_device $dev $abs_path + fi + + echo "Resuming $dev." + dmsetup resume $dev || exit 1 + if [ $? -ne 0 ]; then + ret=$? + fi + + return $ret +} + +check () { + user_path=${@: -1} + qemu_img_args=$@ + + qemu_img $user_path check $qemu_img_args + return $? +} + +snapshot () { + user_path=${@: -1} + qemu_img_args=$@ + + qemu_img $user_path snapshot $qemu_img_args + return $? +} + +resize () { + user_path=${@:(-2):1} + qemu_img_args=$@ + + qemu_img --wants_reload $user_path resize $qemu_img_args + return $? +} + +prog_name=$(basename $0) + +case $1 in + "create") + shift + create "$@" + exit 0 + ;; + "remove") + shift + remove "$@" + ;; + "check") + shift + check "$@" + ;; + "snapshot") + shift + snapshot "$@" + ;; + "resize") + shift + resize "$@" + ;; + *) + usage + exit 1 + ;; +esac From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EEBBDC4332F for ; Tue, 29 Mar 2022 05:32:13 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-591-FDrxBL3oP0GrlIy4zHNeeA-1; Tue, 29 Mar 2022 01:32:07 -0400 X-MC-Unique: FDrxBL3oP0GrlIy4zHNeeA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5E0361C06929; Tue, 29 Mar 2022 05:32:05 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com [10.30.29.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2400E401E58; Tue, 29 Mar 2022 05:32:04 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (localhost [IPv6:::1]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id 7F34F1940355; Tue, 29 Mar 2022 05:32:02 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id A9D521947BBE for ; Mon, 28 Mar 2022 11:18:46 +0000 (UTC) Received: by smtp.corp.redhat.com (Postfix) id 9E8F5C15D57; Mon, 28 Mar 2022 11:18:46 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast05.extmail.prod.ext.rdu2.redhat.com [10.11.55.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9ADAFC15D4F for ; Mon, 28 Mar 2022 11:18:46 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-2.mimecast.com [207.211.31.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7DD049219A6 for ; Mon, 28 Mar 2022 11:18:46 +0000 (UTC) Received: from mail-lf1-f41.google.com (mail-lf1-f41.google.com [209.85.167.41]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-349-YmFeVCezMUGy6j2KwPiI0w-1; Mon, 28 Mar 2022 07:18:44 -0400 X-MC-Unique: YmFeVCezMUGy6j2KwPiI0w-1 Received: by mail-lf1-f41.google.com with SMTP id k21so24116752lfe.4 for ; Mon, 28 Mar 2022 04:18:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:from:to:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=N926ipqlEwj4JO1xTcsrXgCa3AA/3fWt5Bm+xv75a5E=; b=JT84F5wMcVcboXPLR+lIAItmyjVOGu0WrKsdZ0k2Sitogc6mU5XmbnYPvCtlChlF8U clPSf+9/e/vrAauH6Ym6FPr+q5LO6l21J/ZbWi3X7I2BFtkIUy4HoXsgd05/TX3YrT4m rlmtvZsHeufsrqLBONXIvGnQyGqmM9hJlMR+LXTukOfu7BczM9TvQ6o+2HuITEZpoTeA cmRMLhu7fm0anmuSGDhxifT2zU2uoCWM68dsX1ZobWQjBGTmVMXhodufgiEADVywP6d0 nnOT+VsscWJpgNp0yAERbUmolcq3HdHk+EMleHHL+2oNM+BYTefOUvnjGyFqplqGLDZa H6+g== X-Gm-Message-State: AOAM531mCxoc97kYo7Rbl8IPuQLC3DjZF8Hb5/jRss0X+JksWg79cCL7 6vepzO2VkNI60RWs46dJVSNoMgJAbrVqKj7O X-Google-Smtp-Source: ABdhPJwe/gX2NWrPoEuwfjHT3h0n/GqZ0JM31cCteh0vGnsgz/4AYMDMtb0HtiAGvAasyUXkJKGZ5w== X-Received: by 2002:ac2:43bb:0:b0:44a:1ee6:8c12 with SMTP id t27-20020ac243bb000000b0044a1ee68c12mr19628435lfl.683.1648466323220; Mon, 28 Mar 2022 04:18:43 -0700 (PDT) Received: from [127.0.1.1] ([2.92.192.17]) by smtp.gmail.com with ESMTPSA id t19-20020a199113000000b0044a2d7a1f4asm1601632lfd.206.2022.03.28.04.18.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Mar 2022 04:18:42 -0700 (PDT) From: Kirill Tkhai To: agk@redhat.com, snitzer@redhat.com, dm-devel@redhat.com, song@kernel.org, linux-kernel@vger.kernel.org, khorenko@virtuozzo.com, kirill.tkhai@openvz.org Date: Mon, 28 Mar 2022 14:18:41 +0300 Message-ID: <164846632180.251310.3616379476259718920.stgit@pro> In-Reply-To: <164846619932.251310.3668540533992131988.stgit@pro> References: <164846619932.251310.3668540533992131988.stgit@pro> User-Agent: StGit/1.5 MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 X-Mailman-Approved-At: Tue, 29 Mar 2022 05:32:01 +0000 Subject: [dm-devel] [PATCH 4/4] dm-qcow2: Add helper for working with dm-qcow2 devices X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit This scripts allows to create and remove dm-qcow2 device, create internal snapshot, resize virtual device size, or check image consistency on live device. Signed-off-by: Kirill Tkhai --- scripts/qcow2-dm.sh | 249 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 249 insertions(+) create mode 100755 scripts/qcow2-dm.sh diff --git a/scripts/qcow2-dm.sh b/scripts/qcow2-dm.sh new file mode 100755 index 000000000000..7d9bda44c1d6 --- /dev/null +++ b/scripts/qcow2-dm.sh @@ -0,0 +1,249 @@ +#!/bin/bash +# +# This requires parameter dm_qcow2.kernel_sets_dirty_bit=y + +usage () { + cat < + $prog_name remove + $prog_name check [qemu-img check optional args] + $prog_name snapshot [qemu-img snapshot optional args] + $prog_name resize [qemu-img resize optional args] [+ | -]size +EOF +} + +get_img_size () { + sz=`qemu-img info -f qcow2 $1 | grep "virtual size" | sed 's/.*(\(.*\) bytes)/\1/'` + echo $sz +} + +get_nr_imgs () { + nr=`echo $1 | sed "s/.*qcow2 \(\w\) .*$/\1/"` + echo $nr +} + +get_dev_of_image () { + abs_path=$1 + + while read line; do + dev=`echo $line | sed "s/:.*//"` + nr_imgs=$(get_nr_imgs "$line") + top_img_id=$((nr_imgs - 1)) + + top_img_path=`dmsetup message $dev 0 get_img_name $top_img_id` + if [ -z "$top_img_path" ]; then + echo >&2 "Error during search of device"; exit 1; + return 1 + fi + + if [ "$abs_path" != "$top_img_path" ]; then + continue + fi + + echo $dev + return 0 + + done < <(LANG=C dmsetup table --target=qcow2 | grep -v "No devices found") + + return 0 +} + +create () { + if [ "$#" -ne 2 ]; then + echo >&2 "Wrong number of arguments."; usage; exit 1; + fi + + file=$1 + dev=$2 + files=() + fds="" + + qemu-img check $file || exit 1 + + disk_sz=$(get_img_size "$file") + echo disk_sz=$disk_sz + if [ -z "$disk_sz" ]; then + echo "Can't get disk size."; exit 1; + fi + + while :; do + if [ ! -f "$file" ]; then + echo "$file does not exist."; exit 1; + fi + + files+=("$file") + + exec {fd}<>$file || exit 1 + flock -x $fd || exit 1 + fds="$fd $fds" + + file=`qemu-img info $file | grep "backing file:" | sed "s/backing file: //"` + if [ -z "$file" ]; then + break + fi + done + + echo "Create device [$dev] of size $disk_sz from [${files[*]}]." + dmsetup create $dev --table "0 $((disk_sz / 512)) qcow2 ${fds}" +} + +reload_device () { + disk_sz=$(get_img_size "$abs_path") + if [ -z "$disk_sz" ]; then + echo "Can't get disk size."; return; + fi + + line=`dmsetup table $dev` + nr_imgs=$(get_nr_imgs "$line") + top_img_id=$((nr_imgs - 1)) + fds="" + + for id in `seq 0 $top_img_id`; + do + file=`dmsetup message $dev 0 get_img_name $id` + if [ -z "$file" ]; then + echo "Can't get image file."; return; + fi + exec {fd}<>$file || exit 1 + + fds="$fds $fd" + done + + echo "Reloading $dev." + dmsetup reload $dev --table "0 $((disk_sz / 512)) qcow2 ${fds}" +} + +remove () { + if [ "$#" -ne 1 ]; then + echo >&2 "Wrong number of arguments."; usage; exit 1; + fi + user_path=$1 + abs_path=`realpath $user_path` + + dev=$(get_dev_of_image "$abs_path") + if [ -z "$dev" ]; then + echo >&2 "Can't find device with [$user_path] top image."; exit 1 + fi + + echo "Removing device [$dev]." + dmsetup remove $dev + ret=$? + + if [ $ret -eq 0 ]; then + #Sanity check + echo "Checking [$abs_path]." + qemu-img check $abs_path + fi + exit $ret +} + +qemu_img () { + wants_reload=0 + if [ $1 == "--wants_reload" ]; then + wants_reload=1 + shift + fi + + if [ "$#" -lt 3 ]; then + echo >&2 "Wrong number of arguments."; usage; exit 1; + fi + + user_path=$1 + cmd=$2 + abs_path=`realpath $user_path` + qemu_img_args=${@: 2} + + dev=$(get_dev_of_image "$abs_path") + if [ -z "$dev" ]; then + echo >&2 "Can't find device by [$user_path]."; return 1 + fi + + echo "Suspending $dev." + dmsetup suspend $dev || exit 1 + + if [ "$cmd" != "check" ]; then + echo "Checking $abs_path" + qemu-img check $abs_path + ret=$? + if [ $ret -ne 0 ]; then + echo "Resuming $dev." + dmsetup resume $dev + exit 1 + fi + fi + + echo "===== Call: qemu-img $qemu_img_args. =====" + qemu-img $qemu_img_args + ret=$? + if [ $ret -ne 0 ]; then + echo >&2 "Failed during qemu-img call." + fi + echo "===== End of qemu-img $qemu_img_args. =====" + + if [ $wants_reload -ne 0 ]; then + reload_device $dev $abs_path + fi + + echo "Resuming $dev." + dmsetup resume $dev || exit 1 + if [ $? -ne 0 ]; then + ret=$? + fi + + return $ret +} + +check () { + user_path=${@: -1} + qemu_img_args=$@ + + qemu_img $user_path check $qemu_img_args + return $? +} + +snapshot () { + user_path=${@: -1} + qemu_img_args=$@ + + qemu_img $user_path snapshot $qemu_img_args + return $? +} + +resize () { + user_path=${@:(-2):1} + qemu_img_args=$@ + + qemu_img --wants_reload $user_path resize $qemu_img_args + return $? +} + +prog_name=$(basename $0) + +case $1 in + "create") + shift + create "$@" + exit 0 + ;; + "remove") + shift + remove "$@" + ;; + "check") + shift + check "$@" + ;; + "snapshot") + shift + snapshot "$@" + ;; + "resize") + shift + resize "$@" + ;; + *) + usage + exit 1 + ;; +esac -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel