make nameidata completely opaque outside of fs/namei.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 24 insertions, 0 deletions

diff --git a/fs/namei.c b/fs/namei.c
index db5fe86319e6..398a73b522cb 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -487,6 +487,18 @@ void path_put(const struct path *path)
 }
 EXPORT_SYMBOL(path_put);
 
+struct nameidata {
+        struct path     path;
+        struct qstr     last;
+        struct path     root;
+        struct inode    *inode; /* path.dentry.d_inode */
+        unsigned int    flags;
+        unsigned        seq, m_seq;
+        int             last_type;
+        unsigned        depth;
+        char *saved_names[MAX_NESTED_LINKS + 1];
+};
+
 /*
  * Path walking has 2 modes, rcu-walk and ref-walk (see
  * Documentation/filesystems/path-lookup.txt).  In situations when we can't
@@ -695,6 +707,18 @@ void nd_jump_link(struct nameidata *nd, struct path *path)
         nd->flags |= LOOKUP_JUMPED;
 }
 
+void nd_set_link(struct nameidata *nd, char *path)
+{
+        nd->saved_names[nd->depth] = path;
+}
+EXPORT_SYMBOL(nd_set_link);
+
+char *nd_get_link(struct nameidata *nd)
+{
+        return nd->saved_names[nd->depth];
+}
+EXPORT_SYMBOL(nd_get_link);
+
 static inline void put_link(struct nameidata *nd, struct path *link, void *cookie)
 {
         struct inode *inode = link->dentry->d_inode;