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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC875C7EE2E for ; Fri, 5 May 2023 17:53:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230055AbjEERxR (ORCPT ); Fri, 5 May 2023 13:53:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233240AbjEERxF (ORCPT ); Fri, 5 May 2023 13:53:05 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E39AB1CFC3; Fri, 5 May 2023 10:52:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=tRPpby2rMu2NLvHtx5ki6m3gwlYWmaps8hx8ma/FO2U=; b=VBwbQgwe2nF6iZeSoL8vN8xpol q/UY52aJzbLL3/VFfTI1Gw1jjSqxRQjmjQu4lAePa8ezVwrzQ2TdnXZtxAd/tP8DS7GZvxQ+G0tLg okkAHJyv9OaO6Zpfl0z107RnG8VvV5oGU+1V/Is0eLgLwv6TM1y/rxPfv+G/V3kXvGJ+0ErKQ0ipt BZRJ80H71CSDhnH8ZKf/9O6/eNGGHZ44LFxpWrmn25SGydZ7rYC7rZth2w3oblDhKTO8IUAGKAmHE f1gp8WdlDICtK5C0qi0a8mjiSEjO8DuZqzFLXAKzM9RZTvSHrkpUXg/WGD3pTkb50gfwQy4Ns3pjb qTNvZGtQ==; Received: from 66-46-223-221.dedicated.allstream.net ([66.46.223.221] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1puzb0-00BSyB-34; Fri, 05 May 2023 17:51:55 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Al Viro , Christian Brauner , "Darrick J. Wong" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Subject: [PATCH 7/9] fs: add a method to shut down the file system Date: Fri, 5 May 2023 13:51:30 -0400 Message-Id: <20230505175132.2236632-8-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230505175132.2236632-1-hch@lst.de> References: <20230505175132.2236632-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Add a new ->shutdown super operation that can be used to tell the file system to shut down, and call it from newly created holder ops when the block device under a file system shuts down. This only covers the main block device for "simple" file systems using get_tree_bdev / mount_bdev. File systems their own get_tree method or opening additional devices will need to set up their own blk_holder_ops. Signed-off-by: Christoph Hellwig --- fs/super.c | 21 +++++++++++++++++++-- include/linux/fs.h | 1 + 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/fs/super.c b/fs/super.c index 012ce140080375..f127589700ab25 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1206,6 +1206,22 @@ int get_tree_keyed(struct fs_context *fc, EXPORT_SYMBOL(get_tree_keyed); #ifdef CONFIG_BLOCK +static void fs_mark_dead(struct block_device *bdev) +{ + struct super_block *sb; + + sb = get_super(bdev); + if (!sb) + return; + + if (sb->s_op->shutdown) + sb->s_op->shutdown(sb); + drop_super(sb); +} + +static const struct blk_holder_ops fs_holder_ops = { + .mark_dead = fs_mark_dead, +}; static int set_bdev_super(struct super_block *s, void *data) { @@ -1248,7 +1264,8 @@ int get_tree_bdev(struct fs_context *fc, if (!fc->source) return invalf(fc, "No source specified"); - bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type, NULL); + bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type, + &fs_holder_ops); if (IS_ERR(bdev)) { errorf(fc, "%s: Can't open blockdev", fc->source); return PTR_ERR(bdev); @@ -1333,7 +1350,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type, if (!(flags & SB_RDONLY)) mode |= FMODE_WRITE; - bdev = blkdev_get_by_path(dev_name, mode, fs_type, NULL); + bdev = blkdev_get_by_path(dev_name, mode, fs_type, &fs_holder_ops); if (IS_ERR(bdev)) return ERR_CAST(bdev); diff --git a/include/linux/fs.h b/include/linux/fs.h index 21a98168085641..cf3042641b9b30 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1932,6 +1932,7 @@ struct super_operations { struct shrink_control *); long (*free_cached_objects)(struct super_block *, struct shrink_control *); + void (*shutdown)(struct super_block *sb); }; /* -- 2.39.2