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Schaffner" To: CC: , Tobias Schaffner Subject: [PATCH 1/2] Check if last partition ends at GPT backup header Date: Tue, 8 Nov 2022 12:28:36 +0100 Message-ID: <20221108112837.435213-2-tobias.schaffner@siemens.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221108112837.435213-1-tobias.schaffner@siemens.com> References: <20221108112837.435213-1-tobias.schaffner@siemens.com> MIME-Version: 1.0 X-Originating-IP: [139.25.69.126] X-ClientProxiedBy: DEMCHDC8WAA.ad011.siemens.net (139.25.226.104) To DEMCHDC8WAA.ad011.siemens.net (139.25.226.104) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: HE1EUR01FT065:EE_|AS4PR10MB5546:EE_ X-MS-Office365-Filtering-Correlation-Id: ab5cbd56-ee6a-43c0-e223-08dac17c756c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:194.138.21.76;CTRY:DE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:hybrid.siemens.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230022)(4636009)(396003)(39860400002)(346002)(376002)(136003)(451199015)(46966006)(40470700004)(36840700001)(47076005)(16526019)(1076003)(186003)(336012)(956004)(83380400001)(26005)(82960400001)(82740400003)(2616005)(36860700001)(5660300002)(2906002)(40460700003)(40480700001)(82310400005)(6666004)(107886003)(478600001)(316002)(6916009)(41300700001)(54906003)(70586007)(8936002)(4326008)(8676002)(70206006)(36756003)(356005)(86362001)(81166007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Nov 2022 11:29:11.5428 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ab5cbd56-ee6a-43c0-e223-08dac17c756c X-MS-Exchange-CrossTenant-Id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=38ae3bcd-9579-4fd4-adda-b42e1495d55a;Ip=[194.138.21.76];Helo=[hybrid.siemens.com] X-MS-Exchange-CrossTenant-AuthSource: HE1EUR01FT065.eop-EUR01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS4PR10MB5546 X-Original-Sender: tobias.schaffner@siemens.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@siemens.com header.s=selector2 header.b=UStqMbn8; arc=pass (i=1); spf=pass (google.com: domain of tobias.schaffner@siemens.com designates 40.107.6.86 as permitted sender) smtp.mailfrom=tobias.schaffner@siemens.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=siemens.com Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_MSPIKE_H2,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= From: Tobias Schaffner The GPT backup header has a fixed size of 33 512 byte blocks. Check if the last partition ends at the block before the start of the GUID partition table backup header. If so the partition is fully expanded. Signed-off-by: Tobias Schaffner --- .../files/expand-last-partition.sh | 21 +++++++++---------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh b/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh index 57055cc..0d662cc 100755 --- a/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh +++ b/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh @@ -22,24 +22,23 @@ if [ "${ROOT_DEV}" = "${BOOT_DEV}" ]; then exit 1 fi -# this value is in blocks. Normally a block has 512 bytes. -BUFFER_SIZE=32768 BOOT_DEV_NAME=${BOOT_DEV##*/} +LAST_PART_NAME="$(lsblk -l -o NAME "${BOOT_DEV}" | tail -1)" +LAST_PART="/dev/${LAST_PART_NAME}" + DISK_SIZE="$(cat /sys/class/block/"${BOOT_DEV_NAME}"/size)" -ALL_PARTS_SIZE=0 -for PARTITION in /sys/class/block/"${BOOT_DEV_NAME}"/"${BOOT_DEV_NAME}"*; do - PART_SIZE=$(cat "${PARTITION}"/size) - ALL_PARTS_SIZE=$((ALL_PARTS_SIZE + PART_SIZE)) -done +LAST_PART_SIZE="$(cat /sys/class/block/"${LAST_PART_NAME}"/size)" +LAST_PART_START="$(cat /sys/class/block/"${LAST_PART_NAME}"/start)" + +# The GUID partition table stores its backup in the last 33 blocks of the table. +# Therefore the last partition ends 33 before the end of the disk if expanded. +GPT_BACKUP_SIZE=33 -MINIMAL_SIZE=$((ALL_PARTS_SIZE + BUFFER_SIZE)) -if [ "$DISK_SIZE" -lt "$MINIMAL_SIZE" ]; then +if [ $((LAST_PART_START + LAST_PART_SIZE + GPT_BACKUP_SIZE)) -lt "${DISK_SIZE}" ]; then echo "Disk is practically already full, doing nothing." >&2 exit 0 fi -LAST_PART="$(sfdisk -d "${BOOT_DEV}" 2>/dev/null | tail -1 | cut -d ' ' -f 1)" - # Transform the partition table as follows: # # - Remove any 'last-lba' header so sfdisk uses the entire available space.