[PATCH 06/17] btrfs: use the super_block as holder when mounting file systems
From: Christoph Hellwig <hch@lst.de>
Date: 2023-08-11 10:09:48
Also in:
linux-btrfs, linux-fsdevel, linux-s390
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
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 <hch@lst.de> --- 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)
--
2.39.2