From nobody Thu Nov 28 09:49:11 2024 Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1CFA519885B; Wed, 2 Oct 2024 22:13:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727907226; cv=none; b=DVa0wwuBeoWDGEP8gZvTY6Jr5P902fUPSPk87ThuRNVILrht/XhDKc1VXdR8fXA4XSPEVZqt0Pd6JJQxW4mWeledG+jVlK9H3loqts6/zgiVvyYChPvMrhGxHoe/gqMzuSyIP0cmeVF2WHHHlDH4sDzHdxxvqbSkD0EOAxA40xA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727907226; c=relaxed/simple; bh=vIZUmOhkctrpxNjE/bq31Se+xRGgI8VKyz9uNEv0GsQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D4Qldwg1fG6DLgZbU30UGAtnhMoBDwa1aMWGNW0+v+2YQuGI/wmo5PBWeV2jTPjVmOKx0yfaWLRG1aEnh9SzRp2ifCitmpU1aGZ0iCOq82LTDKBwhMWTWN1RIHCVW8H2h+FZcqTJE7PnmWUAfFNve4goPlhzfpd4UQlEqGnNp8U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hJdHh1pD; arc=none smtp.client-ip=209.85.128.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hJdHh1pD" Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-42cbb08a1a5so2074785e9.3; Wed, 02 Oct 2024 15:13:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727907223; x=1728512023; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4T9c6jNuxQUPP/Rbzo55YkzEPcrdsPIICvkg9bn4/tM=; b=hJdHh1pDDc/wwQTw1aH+f3MPnAAzQk3DMfCYsLppvZPPYaGo78s+XDY2QXpl3ivF4r Eyz/AUgGwiC8x8WZRCy/FpG2MCcERU+gdpV7RG1U6rpDXr096E3wwTFr3hQ7LfqvTnPP 36qyfooIgE6X3oSHR0sge39+pEkwBfo6D3MTj1AhEBbsLJLu5lWkbrvnTaZ8LXvtoYJ9 M/wuQmundepYbRPFahGic1sD7nFKeeIo5z9YqJq1eFJP29TZRWmHTigs5j4J2bPT7rQJ f7080xDkLKLc7rm0wJthIK5p2UwIn/il7pZ5ylhwDJOewxDkvzjp71O54Jb/8PFV34Dx 52fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727907223; x=1728512023; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4T9c6jNuxQUPP/Rbzo55YkzEPcrdsPIICvkg9bn4/tM=; b=MVscUUG2gEGv9d6tUtSnasGfj9rBzAloA870R6IwFR1D9dy43OgL4+SjCiNZmDARTV NuoST+LQmcXqUd5KBNBqa3udHPnLSgITFcfaAUlPv2eYRkLw8OPsLRDtx8MrnkWn/EX9 8MzwzGGSeBJ9/t8d/x95CTcOMvCLpvsm4BRbFR80k5rUyjnoOsY8nxwQoT54aCb1b4Rs ukXJYJh/HIEXLkLzu3R8wzm3YX4ZeSmQ5DLc3Tb2vQ/PzrQZ09QxcKcpCXslh9EMPXd1 L/zHIH9Qc4C8s4tmE8/tRBvdXw1Zd8NOe3E6PTuLTUIUOu6nqnMIfz36i5cWIB+kRg8G oAXw== X-Forwarded-Encrypted: i=1; AJvYcCU+2Dzzyz9xOSLWhnz9phH2zF2pQ36xtob8mKqTRRF/+kwM4/Yzu7inF+NwumN71iB1WKXYvR9B4mpl8FDp@vger.kernel.org, AJvYcCUpC9Kyml93hrrTza8hKvcNrGkTiAlyqZZCQG9wlEZh7fBlgIzifXckEtF3LuwqnkjLgLVku/4TZenw@vger.kernel.org, AJvYcCUzPqRGZNUYuXLjCt5TxUWIM/6DBBsb4/J/4T+b/cTtWxMrpmLW6B10ITJzgedDP1HYNw7myZIpkbyP8PU=@vger.kernel.org, AJvYcCWOTmP0JSUVj+R8PkkRCqi+mBH7iKJodNG8lnSipQ9SirY0h/QgEKhIaZPiDRJeKyddA1OJqA5ILi7X@vger.kernel.org, AJvYcCXANXhrP0uWNe+jQ+I5X22zZcFzAZGv0Zik9Sfw9hw0umMh0HdigEINv90M7oftYE5GSCG2CBl+bwCr@vger.kernel.org X-Gm-Message-State: AOJu0YycjLqnYW3QWTPIecME6w3GIduK6RhOuN2kCK20XlxZaMauahmd vmSz0cyDS05IfD62P6QMonl2KmAtMbWdtZp4jDc/w83GPlnQXRqR X-Google-Smtp-Source: AGHT+IHVMWSt0Q6Br7yza0Y32FBkOq5Dsl21VP0EwCtbgpPqez3dioXXC+VpAgoAGlxYRcWXNuPDcA== X-Received: by 2002:a05:600c:500d:b0:426:5416:67e0 with SMTP id 5b1f17b1804b1-42f778f435fmr36503995e9.31.1727907223052; Wed, 02 Oct 2024 15:13:43 -0700 (PDT) Received: from localhost.localdomain (93-34-90-105.ip49.fastwebnet.it. [93.34.90.105]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-42f79ead1absm29218245e9.17.2024.10.02.15.13.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Oct 2024 15:13:42 -0700 (PDT) From: Christian Marangi To: Jens Axboe , Jonathan Corbet , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Christian Marangi , Daniel Golle , INAGAKI Hiroshi , Christian Brauner , Al Viro , Ming Lei , Li Lingfeng , Christian Heusel , Avri Altman , Linus Walleij , Adrian Hunter , Riyan Dhiman , Mikko Rapeli , Jorge Ramirez-Ortiz , Li Zhijian , Dominique Martinet , Jens Wiklander , Christophe JAILLET , linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Lorenzo Bianconi , Miquel Raynal , upstream@airoha.com, Christoph Hellwig Cc: Christoph Hellwig Subject: [PATCH v6 1/6] block: add support for defining read-only partitions Date: Thu, 3 Oct 2024 00:11:41 +0200 Message-ID: <20241002221306.4403-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241002221306.4403-1-ansuelsmth@gmail.com> References: <20241002221306.4403-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for defining read-only partitions and complete support for it in the cmdline partition parser as the additional "ro" after a partition is scanned but never actually applied. Signed-off-by: Christian Marangi Reviewed-by: Christoph Hellwig --- block/blk.h | 1 + block/partitions/cmdline.c | 3 +++ block/partitions/core.c | 3 +++ 3 files changed, 7 insertions(+) diff --git a/block/blk.h b/block/blk.h index c718e4291db0..f300212d3e98 100644 --- a/block/blk.h +++ b/block/blk.h @@ -558,6 +558,7 @@ 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/cmdline.c b/block/partitions/cmdline.c index 152c85df92b2..da3e719d8e51 100644 --- a/block/partitions/cmdline.c +++ b/block/partitions/cmdline.c @@ -237,6 +237,9 @@ static int add_part(int slot, struct cmdline_subpart *s= ubpart, put_partition(state, slot, subpart->from >> 9, subpart->size >> 9); =20 + if (subpart->flags & PF_RDONLY) + state->parts[slot].flags |=3D ADDPART_FLAG_READONLY; + info =3D &state->parts[slot].info; =20 strscpy(info->volname, subpart->name, sizeof(info->volname)); diff --git a/block/partitions/core.c b/block/partitions/core.c index ab76e64f0f6c..abad6c83db8f 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -373,6 +373,9 @@ static struct block_device *add_partition(struct gendis= k *disk, int partno, goto out_del; } =20 + if (flags & ADDPART_FLAG_READONLY) + bdev_set_flag(bdev, BD_READ_ONLY); + /* everything is up and running, commence */ err =3D xa_insert(&disk->part_tbl, partno, bdev, GFP_KERNEL); if (err) --=20 2.45.2