Introduce path_get()

This introduces the symmetric function to path_put() for getting a reference to the dentry and vfsmount of a struct path in the right order. Signed-off-by: Jan Blunck <[email protected]> Signed-off-by: Andreas Gruenbacher <[email protected]> Acked-by: Christoph Hellwig <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
redpig · Feb 15, 2008 · 5dd784d · 5dd784d
1 parent 09da591
commit 5dd784d
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Showing 2 changed files with 16 additions and 2 deletions.
diff --git a/fs/namei.c b/fs/namei.c
@@ -362,6 +362,19 @@ int deny_write_access(struct file * file)
 	return 0;
 }
 
+/**
+ * path_get - get a reference to a path
+ * @path: path to get the reference to
+ *
+ * Given a path increment the reference count to the dentry and the vfsmount.
+ */
+void path_get(struct path *path)
+{
+	mntget(path->mnt);
+	dget(path->dentry);
+}
+EXPORT_SYMBOL(path_get);
+
 /**
  * path_put - put a reference to a path
  * @path: path to put the reference to
@@ -1160,8 +1173,8 @@ static int do_path_lookup(int dfd, const char *name,
 		if (retval)
 			goto fput_fail;
 
-		nd->path.mnt = mntget(file->f_path.mnt);
-		nd->path.dentry = dget(dentry);
+		nd->path = file->f_path;
+		path_get(&file->f_path);
 
 		fput_light(file, fput_needed);
 	}

diff --git a/include/linux/path.h b/include/linux/path.h
@@ -9,6 +9,7 @@ struct path {
 	struct dentry *dentry;
 };
 
+extern void path_get(struct path *);
 extern void path_put(struct path *);
 
 #endif  /* _LINUX_PATH_H */