kernfs: add @mode to kernfs_create_dir[_ns]()

sysfs assumed 0755 for all newly created directories and kernfs
inherited it.  This assumption is unnecessarily restrictive and
inconsistent with kernfs_create_file[_ns]().  This patch adds @mode
parameter to kernfs_create_dir[_ns]() and update uses in sysfs
accordingly.  Among others, this will be useful for implementations of
the planned ->mkdir() method.

This patch doesn't introduce any behavior differences.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index e9c4e3a03960..0ca2aedfd31b 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -210,8 +210,8 @@ struct kernfs_root *kernfs_create_root(void *priv);
 void kernfs_destroy_root(struct kernfs_root *root);
 
 struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
-                                         const char *name, void *priv,
-                                         const void *ns);
+                                         const char *name, umode_t mode,
+                                         void *priv, const void *ns);
 struct kernfs_node *kernfs_create_file_ns_key(struct kernfs_node *parent,
                                               const char *name,
                                               umode_t mode, loff_t size,
@@ -260,8 +260,8 @@ static inline struct kernfs_root *kernfs_create_root(void *priv)
 static inline void kernfs_destroy_root(struct kernfs_root *root) { }
 
 static inline struct kernfs_node *
-kernfs_create_dir_ns(struct kernfs_node *parent, const char *name, void *priv,
-                     const void *ns)
+kernfs_create_dir_ns(struct kernfs_node *parent, const char *name,
+                     umode_t mode, void *priv, const void *ns)
 { return ERR_PTR(-ENOSYS); }
 
 static inline struct kernfs_node *
@@ -314,9 +314,10 @@ kernfs_find_and_get(struct kernfs_node *kn, const char *name)
 }
 
 static inline struct kernfs_node *
-kernfs_create_dir(struct kernfs_node *parent, const char *name, void *priv)
+kernfs_create_dir(struct kernfs_node *parent, const char *name, umode_t mode,
+                  void *priv)
 {
-        return kernfs_create_dir_ns(parent, name, priv, NULL);
+        return kernfs_create_dir_ns(parent, name, mode, priv, NULL);
 }
 
 static inline struct kernfs_node *