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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 0976FC433F5 for ; Thu, 12 May 2022 19:38:59 +0000 (UTC) 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: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:In-Reply-To:References: List-Owner; bh=NQ649morClnt+CCq0Bz9JeT6WhhtfIHSgLof3CQqPQQ=; b=X5pXMC9iXpYSoz eaBIU0yWOnaUkyelnj7BTCNT3J4JxuLTJA0zHmaH/PIwookHjxBoKmq62Yt+VR9Fhi4Ln+DkW21K0 307ZsHu8ClPOFBHXA1QwOM5ZR3EkBp4jIlm25wFx46XTw/nQuCn6WVRPdH2th3Ln5kvtqBqnTUvOI TumVui2Cs9WgVJ3DNntIKcHVIOKtRgd5Bpu5H1VVkhD1nLIlSfA8CqwcpTn1nU9iPkiPotChio51X JJLEMjgi+eJjRhdLF9zsCudctolusIF2E2PIwBmQfYvKL++EmPszfgZSeUr6J7zpNUtATuejXCKWz 1WYad4DUjYsSIJRvEGNA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1npEds-00DIGV-Py; Thu, 12 May 2022 19:38:32 +0000 Received: from fudo.makrotopia.org ([2a07:2ec0:3002::71]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1npEdp-00DIFy-MA for linux-mtd@lists.infradead.org; Thu, 12 May 2022 19:38:31 +0000 Received: from local by fudo.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.94.2) (envelope-from ) id 1npEdo-0004tZ-51; Thu, 12 May 2022 21:38:28 +0200 Date: Thu, 12 May 2022 20:38:22 +0100 From: Daniel Golle To: linux-block@vger.kernel.org, linux-efi@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Tom Rini , Jens Axboe , Davidlohr Bueso , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Masahiro Yamada Subject: [PATCH v3 1/5] block: add new flag to add partitions read-only Message-ID: MIME-Version: 1.0 Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220512_123829_758520_52B1E521 X-CRM114-Status: GOOD ( 12.52 ) 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 Add flag ADDPART_FLAG_READONLY to allow partition parsers marking a partition to be set read-only. This is needed for the uImage.FIT partition parser added by a follow-up commit: we need to be sure the contents of uImage.FIT sub-images remain unaltered they are validated using a hash within the uImage.FIT structure which also serves as partition table. Signed-off-by: Daniel Golle --- block/blk.h | 1 + block/partitions/core.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/block/blk.h b/block/blk.h index 434017701403fb..c20592fe9bed4b 100644 --- a/block/blk.h +++ b/block/blk.h @@ -404,6 +404,7 @@ void blk_free_ext_minor(unsigned int minor); #define ADDPART_FLAG_NONE 0 #define ADDPART_FLAG_RAID 1 #define ADDPART_FLAG_WHOLEDISK 2 +#define ADDPART_FLAG_READONLY 4 int bdev_add_partition(struct gendisk *disk, int partno, sector_t start, sector_t length); int bdev_del_partition(struct gendisk *disk, int partno); diff --git a/block/partitions/core.c b/block/partitions/core.c index 8a0ec929023bcd..3e70860beb655e 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -399,6 +399,9 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, goto out_del; } + if (flags & ADDPART_FLAG_READONLY) + bdev->bd_read_only = true; + /* everything is up and running, commence */ err = xa_insert(&disk->part_tbl, partno, bdev, GFP_KERNEL); if (err) -- 2.36.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/