From patchwork Wed Sep 25 21:45:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 13812439 Received: from mail-wm1-f49.google.com (mail-wm1-f49.google.com [209.85.128.49]) (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 2FA62155733; Wed, 25 Sep 2024 21:46:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727300804; cv=none; b=JopIF5jdQ2CGrCQR17O3706Yz26fuSfe3tS00qfljSrRQoJAK8JL9LZKeO9n3jaQgFvJYg77uANw+TxS5NJw8AyeVVsd/71dqTX3Uf3tZ1ltI8JJ15tqEqGdxID1/8hmCX2YSdA55F7kY+u8liEiE3HXWUtfxNrodu+ZuR9XIKw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727300804; c=relaxed/simple; bh=vIZUmOhkctrpxNjE/bq31Se+xRGgI8VKyz9uNEv0GsQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FeJITD+oFK/npaSCwqtudPtO+OeaCGPWdBIH3mAWH+mZsIELftO5N5LHPF6liD3ZL3MOtQRa9WPfMoh4bdXCWi11dEMSFgzh946hlS6PIHXUL5QIg5Y0MhZRgmSjJDJS9bHZVsqnVecGvO306PqF3tLiK2jNATHW/UCgrRrbUOM= 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=jen2M9UI; arc=none smtp.client-ip=209.85.128.49 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="jen2M9UI" Received: by mail-wm1-f49.google.com with SMTP id 5b1f17b1804b1-42cba6cdf32so2336675e9.1; Wed, 25 Sep 2024 14:46:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727300801; x=1727905601; 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=jen2M9UIvNnpuNnpADilgCuXxN91dsPXb0y1OBOAXBcdXNrbOEaNoxH9dHZTPqnW2P /UcBhRYSVD2W8CrrTOyoEy7Hu42y/Y2aJ3kdsWt9jy9quMU+4PzPLl7i/h1M7MweznAm 7rOmpMFpgF22QStPELnXxE9jm7l892MzswpgvEgLULE57TM8h9YRsNO8bpPZ8XxsxGkQ mOtYKjNDQJMjg1qG4FZqJj0FE16pz08ct082r0tx2vTUs+FE+6ojGNAmKpUryWj798u5 B2+8rcK6eq71FvqaRp26KRFJspPNAW/1ncsK+b9EFDPK3RHzQYRnglMOotNlsrc/fSK8 TwcQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727300801; x=1727905601; 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=Whf8o5bATHnzWh+jYkYjOTrs90Guj3AKJZnByJMbU1Zu7QNWWg9DJ4k889UR8TE99g qsAdqtfCuQtzLRbeiqfCHIBAE8ZylnqiE2j4FA/xqEs3S2WQzwnefBQvKlmsv1mCJnvn kkBiH+3j9KHoNfTRv/rAntGxg+BX7UFGIQKGIh1EVBSYo50RlIJV7bztkRrIgfSgcQip Ihh5WbX97DhFeQeUzX6eCdHFoeYZiQKRUzvFuXPHXJb4rUCY6eB3sHIamc06lOC6NDJw kkvRD1ZLzRpgqT107pwEts0is6EKR9eSgAFjSiWhxiike3ArOA5cOQFBlVROxUDempJt IDhg== X-Forwarded-Encrypted: i=1; AJvYcCUFq+kxRifTaihgr/LCEcWFO4+7FWnvw1pAGLqzk5q9uJJpbZtRJPsIfPlJ4uzIpMr6P1YqTv2HrvA1@vger.kernel.org, AJvYcCUrHEhUPNseaq9pEtUAG/4fNaEbTtE2oBc+ByqH8S0NIGF1EDOw8LlIs+VWB7DQL7wXJYbjQymyN/jf@vger.kernel.org, AJvYcCVKjlsLvuJQ1NwDa6tDE/NN6l4fLytxZzf4xadN02e5hOm65lpMcDuGNNRYeIdH6BDoo0nESRCIlPF8Wtv9@vger.kernel.org, AJvYcCVnxj/WuMWZq1Mfoi2QuPK+koww0YiUPipVdC228wbP3+zlqlK4sAy0mvRaXjP9YueRtfBlOWW31S+FXpo=@vger.kernel.org, AJvYcCXUaar8G2rfDg5itex5JYZFbr5XHoUL9tU3T+DDBNz/oR5sWlBb9XVyt/wsB1uaQulDfklH6YuVwkfE@vger.kernel.org X-Gm-Message-State: AOJu0YyC4+SLnsL8JKYWTvSSezp5tr1/RAKXRSuAsB9EM96ekyDLdbHT LQzhDZ48QJuT7H61d6fJAeK93cGnmvvDuWQkmwayWxpCCOYDKVcN X-Google-Smtp-Source: AGHT+IFoBL1R6dV7SQmlZLkBLTdCPdCS80FZbnIfOFtYbfTr6iXHb66aYiNtJGIPYb/itJ2vx6/jEQ== X-Received: by 2002:a05:600c:8a7:b0:42c:c003:edd8 with SMTP id 5b1f17b1804b1-42e96953e43mr23751955e9.6.1727300801042; Wed, 25 Sep 2024 14:46:41 -0700 (PDT) Received: from localhost.localdomain (93-34-90-105.ip49.fastwebnet.it. [93.34.90.105]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-42e96a1f2aasm28802565e9.45.2024.09.25.14.46.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Sep 2024 14:46:40 -0700 (PDT) From: Christian Marangi To: Jens Axboe , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Ulf Hansson , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Christian Marangi , Simon Glass , INAGAKI Hiroshi , Daniel Golle , Al Viro , Christian Brauner , Li Lingfeng , Christian Heusel , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, Lorenzo Bianconi Cc: Christoph Hellwig Subject: [RFC PATCH v2 1/5] block: add support for defining read-only partitions Date: Wed, 25 Sep 2024 23:45:21 +0200 Message-ID: <20240925214544.6114-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240925214544.6114-1-ansuelsmth@gmail.com> References: <20240925214544.6114-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-mmc@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)