From patchwork Tue Nov 3 10:00:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 314202 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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 DA5B7C388F2 for ; Tue, 3 Nov 2020 10:09:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7866122264 for ; Tue, 3 Nov 2020 10:09:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="YtwceN9K" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727385AbgKCKJM (ORCPT ); Tue, 3 Nov 2020 05:09:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34588 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725988AbgKCKJM (ORCPT ); Tue, 3 Nov 2020 05:09:12 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5718DC0613D1; Tue, 3 Nov 2020 02:09:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=yzIIgNLRQ5hr/U49/fJ5RhQ164CeG1Fa9VOyUyyQ2Qs=; b=YtwceN9KWOpRvAJeKjna0uxhT2 zfi8ePgFdz+0CvmDDLFAtUfqeXGnuuptfybwd77cZbevtGtbawiPzfsYjp0VmcEleoTbgnB8XlJPK ejcLMADyNbVObDAMaQgR+M+c09vTxx6MglQITc5+0GJLUlmc1Qv8dgZjOwaO7L4jRpIq77c38UYu0 L5FLNa5OnXCzhiqIn94rFEwacKSUfDRAqc/pGEBq48eZ8/DQKTpCPwqiBj/Z301fXucoQ5ej24FFw oJel3TuxyafBDpL03ZNO2F7MUoHj9Tk122Rud8EUxzrzRfIM5+b4/lPO8onCuI+UDom4KNpyx+iSH v4eW4rvg==; Received: from 089144208145.atnat0017.highway.a1.net ([89.144.208.145] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kZtFQ-0000Sw-01; Tue, 03 Nov 2020 10:09:04 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Ilya Dryomov , Song Liu , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Stefan Haberland , Jan Hoeppner , linux-block@vger.kernel.org, ceph-devel@vger.kernel.org, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mtd@lists.infradead.org, linux-s390@vger.kernel.org Subject: [PATCH 03/10] block: add a new set_read_only method Date: Tue, 3 Nov 2020 11:00:11 +0100 Message-Id: <20201103100018.683694-4-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201103100018.683694-1-hch@lst.de> References: <20201103100018.683694-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Add a new method to allow for driver-specific processing when setting or clearing the block device read-only state. This allows to replace the cumbersome and error-prone override of the whole ioctl implementation. Signed-off-by: Christoph Hellwig --- block/ioctl.c | 5 +++++ include/linux/blkdev.h | 1 + 2 files changed, 6 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index c6d8863f040945..a6fa16b9770593 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -389,6 +389,11 @@ static int blkdev_roset(struct block_device *bdev, fmode_t mode, return ret; if (get_user(n, (int __user *)arg)) return -EFAULT; + if (bdev->bd_disk->fops->set_read_only) { + ret = bdev->bd_disk->fops->set_read_only(bdev, n); + if (ret) + return ret; + } set_device_ro(bdev, n); return 0; } diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 639cae2c158b59..5c1ba8a8d2bc7e 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1850,6 +1850,7 @@ struct block_device_operations { void (*unlock_native_capacity) (struct gendisk *); int (*revalidate_disk) (struct gendisk *); int (*getgeo)(struct block_device *, struct hd_geometry *); + int (*set_read_only)(struct block_device *bdev, bool ro); /* this callback is with swap_lock and sometimes page table lock held */ void (*swap_slot_free_notify) (struct block_device *, unsigned long); int (*report_zones)(struct gendisk *, sector_t sector,