[patch 08/10] Introduce path_get()

jblunck
2007-09-27T14:11:14Z

[-- Attachment #1: nameidata-path-5.diff --]
[-- Type: text/plain, Size: 1552 bytes --]

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 <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
---
fs/namei.c | 17 +++++++++++++++--
include/linux/path.h | 1 +
2 files changed, 16 insertions(+), 2 deletions(-)

Index: b/fs/namei.c
===================================================================
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -348,6 +348,20 @@ int deny_write_access(struct file * file
}

/**
+ * 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.
+ */
+struct path *path_get(struct path *path)
+{
+ mntget(path->mnt);
+ dget(path->dentry);
+ return path;
+}
+EXPORT_SYMBOL(path_get);
+
+/**
* path_put - put a reference to a path
* @path: path to put the reference to
*
@@ -1145,8 +1159,7 @@ static int fastcall do_path_lookup(int d
if (retval)
goto fput_fail;

- nd->path.mnt = mntget(file->f_path.mnt);
- nd->path.dentry = dget(dentry);
+ nd->path = *path_get(&file->f_path);

fput_light(file, fput_needed);
}
Index: b/include/linux/path.h
===================================================================
--- a/include/linux/path.h
+++ b/include/linux/path.h
@@ -9,6 +9,7 @@ struct path {
struct dentry *dentry;
};

+extern struct path *path_get(struct path *);
extern void path_put(struct path *);

#endif /* _LINUX_PATH_H */

--