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

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
......@@ -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);
}
......
......@@ -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 */
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