From patchwork Sun Sep 29 14:06:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 13815131 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (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 13CB717BEB7; Sun, 29 Sep 2024 14:08:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727618899; cv=none; b=ohKq+DVlAGEBJ0mM282awoFodVGeLmAKF73yQvZANEl9cdadoNjyUyLsRFO8k3u2VRuxBYiMnpx5zR9XfhVnLH6L9fB2W6gfqq37koEtTBjPGqaCGo2/jsGxLI58PDNtAhqgM7vqh8ViBOyltlYUWp+33JLa4hbvuMu3eIqkkJE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727618899; c=relaxed/simple; bh=vIZUmOhkctrpxNjE/bq31Se+xRGgI8VKyz9uNEv0GsQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uzcpDZUbKO0gmjJzzlhNMorT/hfZGmNy2u1LRJg928jI7J/WnOJj3YnbRY5pYz4kgcDw4OeMO54zHOszMJoDBGzOgoeZJgOytSYeDv7hVTD3BTM/IRU9ugyCk+4+GAgEYcxPYKNQ5TSiga1857ZUbGQHpoVsgcRLhuQaQUO3BM4= 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=lrgLegqu; arc=none smtp.client-ip=209.85.128.43 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="lrgLegqu" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-42cb58d810eso27299535e9.0; Sun, 29 Sep 2024 07:08:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727618896; x=1728223696; 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=lrgLegquYAuTu6uY7eJJ1TIxn5FwaJ6WPpM44y1Y52NWLthB7LBG1w/tqSohVx9Huf E9GlIRSXa7MQhx1giItDrfl5qfLZh2DoRnudExgJJCLBNvsT1dwkiyJTocKf85SJUJJn ca9RSM0K3doyqGKjCGZNTQtEP0hsNliSYb0I0NZ/mqNemtYi+LMzHdtHgo/7bQz5bwv5 fxDVV6UMTcWAstZ09Cre3we36QQudm3h38iZt5WkWUk1USOV0UdjdqvO3E0mKWmZ70Mk 3jXdcZO5Y2KcRf1teIdtzJ2Xzoyic8zs/rUfvr5WXPfDHeKfStlWoGdrJjlKVnAN/odw A+iQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727618896; x=1728223696; 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=Stl27JDh4IRoUHn23nkKHDUfqhRh3KyS3fwW5bGNaT8k4hclHsUHKZmFa0YLL9gGIK hYBz1qvYt5sYVc8kKzZHcW/bwQoFXh8Kzjz8EdHSC5JMiwOdFPVxhyMr6EeDXGZaK2yy 8mDUh3CBIIvb5DUjN93d/SQYumFAOOh1NCpac2oAPYGQHUXTPYdudZ4SitDLEukBGrtf 2EOND3n3m5RETpRDOehmV4CRKZw4YcbiBtjkp6xXBEd0oCcdW1UsWl2ZcmoMPgIFLeNo /h6oHPHnAW0fPIIasdFOpkwGHk7lmaIHJ9Nd69pUrU+mAyFMczTZVTMeVAg0VwkJlsh5 3B6g== X-Forwarded-Encrypted: i=1; AJvYcCUHqepvQax5WQiLw+3FJUJ7AmdfMaLAO5QZMosWkSSJ1VtGIcbLe4RWJuv3GoAYirPw0530vzZyNunl@vger.kernel.org, AJvYcCUV1a4NwWx7/DYwluBVelaJlncHKqYvCA4+SB5ckeZgiOQ2TIaJpXS7sG22aW4MojsgM4WSI616hRcOyDGd@vger.kernel.org, AJvYcCVDBNOfcrnCjKpghtnoKArQehSKIgELP7c1lGwDRkid887EZvEzVxRrwL+hmVblFHFH9MwnffDI2U1p@vger.kernel.org, AJvYcCWVLAIPk7UdDf429USLaYqLwlrd4OP8fJTlZUnUwZN8bf9ucLqx6LgbwBFOgtCvWLFGN7ySNBFFQE2ZbtM=@vger.kernel.org, AJvYcCWv/MsqK3XR5vi8oNdDHIyt/f7OSqpg/g/hPAhGit53rfYA8sWK+Jp/EJFRRofpvrHyp7fSk3jyv4ie@vger.kernel.org X-Gm-Message-State: AOJu0YzS57zFc1XjdtogilU8fTpFj06efzfh9TLg+MeMtKbfN7MV7pY2 OqkF4UL4yr8pab/u0ZFI0oAI5V90RoLBxnNIAQIhtXBVynLBX8E/ X-Google-Smtp-Source: AGHT+IHXC9+7csQPIjoe/7saRtUaNLdxTZ+PIvoa34staMYR9XMAPk/Nqpjyg4a5WE1aJ21G12OGlA== X-Received: by 2002:a05:600c:5252:b0:424:8743:86b4 with SMTP id 5b1f17b1804b1-42f521ce279mr75719125e9.6.1727618896050; Sun, 29 Sep 2024 07:08:16 -0700 (PDT) Received: from localhost.localdomain (93-34-90-105.ip49.fastwebnet.it. [93.34.90.105]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-42f57dd3106sm77856005e9.7.2024.09.29.07.08.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Sep 2024 07:08:15 -0700 (PDT) From: Christian Marangi To: Jens Axboe , Jonathan Corbet , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Christian Marangi , INAGAKI Hiroshi , Daniel Golle , Christian Brauner , Al Viro , Jan Kara , Li Lingfeng , Christian Heusel , linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Miquel Raynal , Lorenzo Bianconi , upstream@airoha.com Cc: Christoph Hellwig Subject: [PATCH v3 1/4] block: add support for defining read-only partitions Date: Sun, 29 Sep 2024 16:06:17 +0200 Message-ID: <20240929140713.6883-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240929140713.6883-1-ansuelsmth@gmail.com> References: <20240929140713.6883-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 *subpart, put_partition(state, slot, subpart->from >> 9, subpart->size >> 9); + if (subpart->flags & PF_RDONLY) + state->parts[slot].flags |= ADDPART_FLAG_READONLY; + info = &state->parts[slot].info; 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 gendisk *disk, int partno, goto out_del; } + if (flags & ADDPART_FLAG_READONLY) + bdev_set_flag(bdev, BD_READ_ONLY); + /* everything is up and running, commence */ err = xa_insert(&disk->part_tbl, partno, bdev, GFP_KERNEL); if (err)