Subject: namei(".") behaviour
To: None <>
From: Juergen Hannken-Illjes <>
List: tech-kern
Date: 07/29/2003 18:26:44
While looking over the filesystem snapshot code from FreeBSD I discovered a
somewhat strange behaviour of namei():

If called for a DOT directory ("." or "...path/.") it returns with

    nd.ni_dvp == nd.ni_vp

Even if called with LOCKPARENT flag both (identical) vnodes are not locked.
This leads to a bunch of code like

    if (nd.ni_dvp == nd.ni_vp)

Is there a reason why the parent directory (nd.ni_dvp) is returned unlocked?

If the parent directory was locked this code would become as simple as


Juergen Hannken-Illjes - - TU Braunschweig (Germany)