From patchwork Fri Aug 11 10:08:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13350504 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 DCC7CC04A6A for ; Fri, 11 Aug 2023 10:09:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235624AbjHKKJr (ORCPT ); Fri, 11 Aug 2023 06:09:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235537AbjHKKJe (ORCPT ); Fri, 11 Aug 2023 06:09:34 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 266993A92; Fri, 11 Aug 2023 03:08:55 -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=/3mbalPz9mWKW7oe8+rjeqpDnnAIwNVoPvEAXzlOmEA=; b=Kf0RESes2SiwxcuhMUwkC1tu/v j57mzaPUQPBQ7b7q/sMXcM1MGS5/6YmCDQb61sx4euJkFn2+q0Xoo3oMoMsHwS5hvZmscyu8MmZrR /xHy/ii6KMuk/xo0tgVYh4xLy5Q95qX65RiajMsGHI3FnoIx92eqnLXLR11rYFf54jSV/J4hnjUZC /PoNo3rx7uOSrIBL+rG8hOmVbE5w6SOVONf4lGLv45WAGDA0dSOvWZBVU0NsM09bD1Jo1myLaf47k 1HGTBLAhzumDV20VF//EZRTKnEY3dLY9gBVYtm5b04D0B2bRjyIMZL6GdE41RQKWbD9/jMwMCKq0g WWJcEvwA==; Received: from [88.128.92.63] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qUP4a-00A5fP-0Y; Fri, 11 Aug 2023 10:08:48 +0000 From: Christoph Hellwig To: Al Viro , Christian Brauner Cc: Jens Axboe , Denis Efremov , Josef Bacik , Stefan Haberland , Jan Hoeppner , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , "Darrick J . Wong" , Chris Mason , David Sterba , linux-block@vger.kernel.org, nbd@other.debian.org, linux-s390@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 06/17] btrfs: use the super_block as holder when mounting file systems Date: Fri, 11 Aug 2023 12:08:17 +0200 Message-Id: <20230811100828.1897174-7-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230811100828.1897174-1-hch@lst.de> References: <20230811100828.1897174-1-hch@lst.de> MIME-Version: 1.0 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-btrfs@vger.kernel.org The file system type is not a very useful holder as it doesn't allow us to go back to the actual file system instance. Pass the super_block instead which is useful when passed back to the file system driver. This matches what is done for all other block device based file systems. Signed-off-by: Christoph Hellwig Acked-by: Christian Brauner --- fs/btrfs/super.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 1079a0f541790d..0f7c402fb40349 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -69,8 +69,6 @@ static const struct super_operations btrfs_super_ops; * requested by subvol=/path. That way the callchain is straightforward and we * don't have to play tricks with the mount options and recursive calls to * btrfs_mount. - * - * The new btrfs_root_fs_type also servers as a tag for the bdev_holder. */ static struct file_system_type btrfs_fs_type; static struct file_system_type btrfs_root_fs_type; @@ -1503,8 +1501,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; mutex_lock(&uuid_mutex); - error = btrfs_open_devices(fs_devices, sb_open_mode(flags), - fs_type); + error = btrfs_open_devices(fs_devices, sb_open_mode(flags), s); mutex_unlock(&uuid_mutex); if (error) goto error_deactivate; @@ -1518,7 +1515,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, fs_devices->latest_dev->bdev); shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s", fs_type->name, s->s_id); - btrfs_sb(s)->bdev_holder = fs_type; + btrfs_sb(s)->bdev_holder = s; error = btrfs_fill_super(s, fs_devices, data); } if (!error)