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| author | Tejun Heo <tj@kernel.org> | 2013-11-28 14:54:42 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-29 18:10:48 -0800 |
| commit | df394fb56c64244b30b442e9e02de1a2d9c5a98b (patch) | |
| tree | fc6b65c4356680c92df02c12ea0e386eeff9c992 /fs/sysfs/sysfs.h | |
| parent | bc755553df9ab33f389c1a0a8bd0b4f4646e80ef (diff) | |
| download | lwn-df394fb56c64244b30b442e9e02de1a2d9c5a98b.tar.gz lwn-df394fb56c64244b30b442e9e02de1a2d9c5a98b.zip | |
sysfs, kernfs: make super_blocks bind to different kernfs_roots
kernfs is being updated to allow multiple sysfs_dirent hierarchies so
that it can also be used by other users. Currently, sysfs
super_blocks are always attached to one kernfs_root - sysfs_root - and
distinguished only by their namespace tags.
This patch adds sysfs_super_info->root and update
sysfs_fill/test_super() so that super_blocks are identified by the
combination of both the associated kernfs_root and namespace tag.
This allows mounting different kernfs hierarchies.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs/sysfs.h')
| -rw-r--r-- | fs/sysfs/sysfs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index 2b217cef90be..93b4b68458ad 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -20,6 +20,12 @@ struct sysfs_super_info { /* + * The root associated with this super_block. Each super_block is + * identified by the root and ns it's associated with. + */ + struct kernfs_root *root; + + /* * Each sb is associated with one namespace tag, currently the network * namespace of the task which mounted this sysfs instance. If multiple * tags become necessary, make the following an array and compare |