diff options
| author | Tejun Heo <tj@kernel.org> | 2014-02-03 23:09:15 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-08 04:00:41 +0400 |
| commit | 0c23b2259a4850494e2c53e864ea840597c6cdd3 (patch) | |
| tree | f4d061ea433e443edd43d1f0a186e06aeb2ed95e /include/linux/kernfs.h | |
| parent | 2536390da0d300b2734c721235c082498879841d (diff) | |
| download | linux-0c23b2259a4850494e2c53e864ea840597c6cdd3.tar.xz | |
kernfs: implement kernfs_node_from_dentry(), kernfs_root_from_sb() and kernfs_rename()
Implement helpers to determine node from dentry and root from
super_block. Also add a kernfs_rename_ns() wrapper which assumes NULL
namespace. These generally make sense and will be used by cgroup.
v2: Some dummy implementations for !CONFIG_SYSFS was missing. Fixed.
Reported by kbuild test robot.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kernfs.h')
| -rw-r--r-- | include/linux/kernfs.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 9ca0f09757a1..9c899040c05e 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -234,6 +234,9 @@ struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent, void kernfs_get(struct kernfs_node *kn); void kernfs_put(struct kernfs_node *kn); +struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry); +struct kernfs_root *kernfs_root_from_sb(struct super_block *sb); + struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags, void *priv); void kernfs_destroy_root(struct kernfs_root *root); @@ -288,6 +291,12 @@ kernfs_find_and_get_ns(struct kernfs_node *parent, const char *name, static inline void kernfs_get(struct kernfs_node *kn) { } static inline void kernfs_put(struct kernfs_node *kn) { } +static inline struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry) +{ return NULL; } + +static inline struct kernfs_root *kernfs_root_from_sb(struct super_block *sb) +{ return NULL; } + static inline struct kernfs_root * kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags, void *priv) @@ -388,6 +397,13 @@ static inline int kernfs_remove_by_name(struct kernfs_node *parent, return kernfs_remove_by_name_ns(parent, name, NULL); } +static inline int kernfs_rename(struct kernfs_node *kn, + struct kernfs_node *new_parent, + const char *new_name) +{ + return kernfs_rename_ns(kn, new_parent, new_name, NULL); +} + static inline struct dentry * kernfs_mount(struct file_system_type *fs_type, int flags, struct kernfs_root *root) |