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authorTejun Heo <tj@kernel.org>2014-04-09 19:07:30 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-04-25 22:43:31 +0400
commit7d568a8383bbb9c1f5167781075906acb2bb1550 (patch)
treef25a2d70ce8851e991a53ed6391c899320f097a6 /fs/kernfs/kernfs-internal.h
parenta798c10faf62a505d24e5f6213fbaf904a39623f (diff)
downloadlinux-7d568a8383bbb9c1f5167781075906acb2bb1550.tar.xz
kernfs: implement kernfs_root->supers list
Currently, there's no way to find out which super_blocks are associated with a given kernfs_root. Let's implement it - the planned inotify extension to kernfs_notify() needs it. Make kernfs_super_info point back to the super_block and chain it at kernfs_root->supers. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/kernfs-internal.h')
-rw-r--r--fs/kernfs/kernfs-internal.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index 8be13b2a079b..dc84a3ef9ca2 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -49,6 +49,8 @@ static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
* mount.c
*/
struct kernfs_super_info {
+ struct super_block *sb;
+
/*
* The root associated with this super_block. Each super_block is
* identified by the root and ns it's associated with.
@@ -62,6 +64,9 @@ struct kernfs_super_info {
* an array and compare kernfs_node tag against every entry.
*/
const void *ns;
+
+ /* anchored at kernfs_root->supers, protected by kernfs_mutex */
+ struct list_head node;
};
#define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))