From patchwork Wed Aug 2 15:41:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13338480 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 D968EC04FE1 for ; Wed, 2 Aug 2023 15:42:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234578AbjHBPmj (ORCPT ); Wed, 2 Aug 2023 11:42:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235272AbjHBPmQ (ORCPT ); Wed, 2 Aug 2023 11:42:16 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6AB9B2122; Wed, 2 Aug 2023 08:42:05 -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=M1CYJB5aZHpSvwyG1hOGEAK3efdcwABvgd5jbMJTCG8=; b=4M2U9E2zBIKq45Q55cHcXCmYTg gAnYWD0UBubVeGE8flbFzHcT2SAbc9FEd/qFH3xmSbWluAsI7ww7kYoPqlU3QRz8RzFRKLHIzCgsf cr+3pEEMdDlLG1z5QCdKhFRnxuZje6F/ETjowj21lvzt7iG5qDNkgAKTduXm8RM6mxtnghjEmUiaS 7mgukROVBAbdXXqRfUtEp/TlgAYZIPJaVLwJpzJz5iuX46JRBvvwzLD9hgz9rnWt+GHxif423Xbbh VxSnMzgn7bE0RP3Snb8vXJU9C2OAa1FWQ+NPZeXwjgltT9BQvqIRMcNdE46+kaNcA/LQM6OmRuIiT 4Jzx0irw==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qRDz3-005GGI-2j; Wed, 02 Aug 2023 15:41:58 +0000 From: Christoph Hellwig To: Al Viro , Christian Brauner Cc: Jan Kara , Chris Mason , Josef Bacik , David Sterba , "Theodore Ts'o" , Andreas Dilger , Jaegeuk Kim , Chao Yu , Ryusuke Konishi , "Darrick J. Wong" , Jens Axboe , linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH 06/12] fs: use the super_block as holder when mounting file systems Date: Wed, 2 Aug 2023 17:41:25 +0200 Message-Id: <20230802154131.2221419-7-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230802154131.2221419-1-hch@lst.de> References: <20230802154131.2221419-1-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. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Christian Brauner --- fs/btrfs/super.c | 7 ++----- fs/f2fs/super.c | 7 +++---- fs/super.c | 8 ++++---- 3 files changed, 9 insertions(+), 13 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 5980b5dcc6b163..8a47c7f2690880 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; @@ -1498,8 +1496,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, } else { struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; - error = btrfs_open_devices(fs_devices, sb_open_mode(flags), - fs_type); + error = btrfs_open_devices(fs_devices, sb_open_mode(flags), s); if (error) goto out_deactivate; @@ -1513,7 +1510,7 @@ 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; + fs_info->bdev_holder = s; error = btrfs_fill_super(s, fs_devices, data); } if (!error) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index ca31163da00a55..05c90fdb7a6cca 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1561,7 +1561,7 @@ static void destroy_device_list(struct f2fs_sb_info *sbi) int i; for (i = 0; i < sbi->s_ndevs; i++) { - blkdev_put(FDEV(i).bdev, sbi->sb->s_type); + blkdev_put(FDEV(i).bdev, sbi->sb); #ifdef CONFIG_BLK_DEV_ZONED kvfree(FDEV(i).blkz_seq); #endif @@ -4198,7 +4198,7 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi) /* Single zoned block device mount */ FDEV(0).bdev = blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev, mode, - sbi->sb->s_type, NULL); + sbi->sb, NULL); } else { /* Multi-device mount */ memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN); @@ -4217,8 +4217,7 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi) sbi->log_blocks_per_seg) - 1; } FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path, mode, - sbi->sb->s_type, - NULL); + sbi->sb, NULL); } if (IS_ERR(FDEV(i).bdev)) return PTR_ERR(FDEV(i).bdev); diff --git a/fs/super.c b/fs/super.c index 6aaa275fa8630d..09b65ee1a8b737 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1249,7 +1249,7 @@ int setup_bdev_super(struct super_block *sb, int sb_flags, blk_mode_t mode = sb_open_mode(sb_flags); struct block_device *bdev; - bdev = blkdev_get_by_dev(sb->s_dev, mode, sb->s_type, &fs_holder_ops); + bdev = blkdev_get_by_dev(sb->s_dev, mode, sb, &fs_holder_ops); if (IS_ERR(bdev)) { if (fc) errorf(fc, "%s: Can't open blockdev", fc->source); @@ -1262,7 +1262,7 @@ int setup_bdev_super(struct super_block *sb, int sb_flags, * writable from userspace even for a read-only block device. */ if ((mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) { - blkdev_put(bdev, sb->s_type); + blkdev_put(bdev, sb); return -EACCES; } @@ -1278,7 +1278,7 @@ int setup_bdev_super(struct super_block *sb, int sb_flags, mutex_unlock(&bdev->bd_fsfreeze_mutex); if (fc) warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev); - blkdev_put(bdev, sb->s_type); + blkdev_put(bdev, sb); return -EBUSY; } spin_lock(&sb_lock); @@ -1418,7 +1418,7 @@ void kill_block_super(struct super_block *sb) if (bdev) { bdev->bd_super = NULL; sync_blockdev(bdev); - blkdev_put(bdev, sb->s_type); + blkdev_put(bdev, sb); } }