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 X-Spam-Level: X-Spam-Status: No, score=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE988C4320A for ; Mon, 30 Aug 2021 19:13:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A20E360E77 for ; Mon, 30 Aug 2021 19:13:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A20E360E77 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Di5w6MNxJoocZn+gTrrQkn2J/Mq89x0yQyCl4MrGtAc=; b=Au4TK5wsrOHwsV 7AWTWthtV87LIlHe67OmUo5PDIsqtA6Vzecbkgvd0+Mw1aRCD437VDEMVQuRzSxsnbiq9DQKzIbEw YAlDDJ2XFur7fQnWZaTsQQ4MT8/xCG8zZPZUUDMD3sQdDLNGq+ZBbAHYWYClkQ/8OaNYQkBiNnsq2 Vo8mkHyZeJQ1kij8peldoVbalGL9VMnaEBvpmLGxPkbylVik4yWYx+ZtrX2En4uqIqPKcZY5cfHFO sm4t+thbwoYZFa6oMynhNKXGJfshykEr0nwagHS6ec0AxAI/HB8DzoL9WcbIZpEMm09B/e2EiMA1w eQC6Q0hK+0SWToIB6NVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mKmhx-000PvB-Ci; Mon, 30 Aug 2021 19:12:37 +0000 Received: from relay1-d.mail.gandi.net ([217.70.183.193]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mKmhr-000PuY-5M for linux-mtd@lists.infradead.org; Mon, 30 Aug 2021 19:12:35 +0000 Received: (Authenticated sender: thomas.petazzoni@bootlin.com) by relay1-d.mail.gandi.net (Postfix) with ESMTPSA id DA682240003; Mon, 30 Aug 2021 19:12:25 +0000 (UTC) Date: Mon, 30 Aug 2021 21:12:24 +0200 From: Thomas Petazzoni To: Pintu Agarwal Cc: Mikulas Patocka , open list , Phillip Lougher , linux-fsdevel , linux-mtd , dm-devel@redhat.com, Kernelnewbies , agk@redhat.com, snitzer@redhat.com, Sami Tolvanen Subject: Re: Kernel 4.14: Using dm-verity with squashfs rootfs - mounting issue Message-ID: <20210830211224.76391708@windsurf> In-Reply-To: References: <20210830185541.715f6a39@windsurf> Organization: Bootlin X-Mailer: Claws Mail 3.18.0 (GTK+ 2.24.33; x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210830_121231_397959_816C1102 X-CRM114-Status: GOOD ( 11.39 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hello, On Mon, 30 Aug 2021 23:48:40 +0530 Pintu Agarwal wrote: > ohh that means we already have a working reference. > If possible can you share the details, even 4.19 or higher will be > also a good reference. > > > > Or, another option is to use the new concept from 5.1 kernel that is: > > > dm-mod.create = ? > > How are you doing it today without dm-mod.create ? > I think in 4.14 we don't have dm-mod.create right ? No, but you can backport it easily. Back at http://lists.infradead.org/pipermail/openwrt-devel/2019-November/025967.html I provided backports of this feature to OpenWrt, for the 4.14 and 4.19 kernels. > Here is our kernel command line: > > [ 0.000000] Kernel command line: ro rootwait > console=ttyMSM0,115200,n8 .... verity="95384 11923 > 16da5e4bbc706e5d90511d2a3dae373b5d878f9aebd522cd614a4faaace6baa3 12026 > " rootfstype=squashfs ubi.mtd=40,0,30 ubi.block=0,0 root=/dev/dm-0 > .... init=/sbin/init root=/dev/dm-0 dm="rootfs none ro,0 95384 verity > 1 /dev/ubiblock0_0 /dev/mtdblock53 4096 4096 11923 8 sha256 > 16da5e4bbc706e5d90511d2a3dae373b5d878f9aebd522cd614a4faaace6baa3 > aee087a5be3b982978c923f566a94613496b417f2af592639bc80d141e34dfe7 10 > restart_on_corruption ignore_zero_blocks use_fec_from_device > /dev/mtdblock53 fec_roots 2 fec_blocks 12026 fec_start 12026" ... I don't see how this can work without the dm-mod.create feature. Are you sure the verity= and dm= kernel arguments exist? Best regards, Thomas -- Thomas Petazzoni, co-owner and CEO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/