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Commit 5dd784d0 authored by Jan Blunck's avatar Jan Blunck Committed by Linus Torvalds
Browse files

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: default avatarJan Blunck <jblunck@suse.de>
Signed-off-by: default avatarAndreas Gruenbacher <agruen@suse.de>
Acked-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 09da5916

fs/namei.c

+15 −2
Original line number Diff line number Diff line
@@ -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);

	}

include/linux/path.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */