[PATCH] new helper - kern_path()

Analog of lookup_path(), takes struct path *. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

[PATCH] new helper - kern_path()
Analog of lookup_path(), takes struct path *. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro
1 parent 2515ddc6db
Showing 2 changed files with 12 additions and 0 deletions Side-by-side Diff
fs/namei.c
include/linux/namei.h
@@ -1106,6 +1106,15 @@
 	return do_path_lookup(AT_FDCWD, name, flags, nd);
 }
  
+int kern_path(const char *name, unsigned int flags, struct path *path)
+{
+	struct nameidata nd;
+	int res = do_path_lookup(AT_FDCWD, name, flags, &nd);
+	if (!res)
+		*path = nd.path;
+	return res;
+}
+
 /**
  * vfs_path_lookup - lookup a file path relative to a dentry-vfsmount pair
  * @dentry:  pointer to dentry of the base directory
@@ -2855,6 +2864,7 @@
 EXPORT_SYMBOL(page_symlink);
 EXPORT_SYMBOL(page_symlink_inode_operations);
 EXPORT_SYMBOL(path_lookup);
+EXPORT_SYMBOL(kern_path);
 EXPORT_SYMBOL(vfs_path_lookup);
 EXPORT_SYMBOL(inode_permission);
 EXPORT_SYMBOL(vfs_permission);
@@ -61,6 +61,8 @@
 #define user_path_dir(name, path) \
 	user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path)
  
+extern int kern_path(const char *, unsigned, struct path *);
+
 extern int path_lookup(const char *, unsigned, struct nameidata *);
 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
 			   const char *, unsigned int, struct nameidata *);
...	...	@@ -1106,6 +1106,15 @@
1106	1106	return do_path_lookup(AT_FDCWD, name, flags, nd);
1107	1107	}
1108	1108
	1109	+int kern_path(const char name, unsigned int flags, struct path path)
	1110	+{
	1111	+ struct nameidata nd;
	1112	+ int res = do_path_lookup(AT_FDCWD, name, flags, &nd);
	1113	+ if (!res)
	1114	+ *path = nd.path;
	1115	+ return res;
	1116	+}
	1117	+
1109	1118	/**
1110	1119	* vfs_path_lookup - lookup a file path relative to a dentry-vfsmount pair
1111	1120	* @dentry: pointer to dentry of the base directory
...	...	@@ -2855,6 +2864,7 @@
2855	2864	EXPORT_SYMBOL(page_symlink);
2856	2865	EXPORT_SYMBOL(page_symlink_inode_operations);
2857	2866	EXPORT_SYMBOL(path_lookup);
	2867	+EXPORT_SYMBOL(kern_path);
2858	2868	EXPORT_SYMBOL(vfs_path_lookup);
2859	2869	EXPORT_SYMBOL(inode_permission);
2860	2870	EXPORT_SYMBOL(vfs_permission);
...	...	@@ -61,6 +61,8 @@
61	61	#define user_path_dir(name, path) \
62	62	user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW \| LOOKUP_DIRECTORY, path)
63	63
	64	+extern int kern_path(const char , unsigned, struct path );
	65	+
64	66	extern int path_lookup(const char , unsigned, struct nameidata );
65	67	extern int vfs_path_lookup(struct dentry , struct vfsmount ,
66	68	const char , unsigned int, struct nameidata );