From owner-cvs-src-old@FreeBSD.ORG  Sat Nov 22 13:11:18 2008
Return-Path: <owner-cvs-src-old@FreeBSD.ORG>
Delivered-To: cvs-src-old@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0A273106574B
	for <cvs-src-old@freebsd.org>; Sat, 22 Nov 2008 13:11:18 +0000 (UTC)
	(envelope-from kib@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id E1A368FC08
	for <cvs-src-old@freebsd.org>; Sat, 22 Nov 2008 13:11:17 +0000 (UTC)
	(envelope-from kib@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id mAMDBHEn028928
	for <cvs-src-old@freebsd.org>; Sat, 22 Nov 2008 13:11:17 GMT
	(envelope-from kib@repoman.freebsd.org)
Received: (from svn2cvs@localhost)
	by repoman.freebsd.org (8.14.3/8.14.3/Submit) id mAMDBHHF028927
	for cvs-src-old@freebsd.org; Sat, 22 Nov 2008 13:11:17 GMT
	(envelope-from kib@repoman.freebsd.org)
Message-Id: <200811221311.mAMDBHHF028927@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to
	kib@repoman.freebsd.org using -f
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sat, 22 Nov 2008 13:11:11 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/ufs/ufs ufs_lookup.c
X-BeenThere: cvs-src-old@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: **OBSOLETE** CVS commit messages for the src tree
	<cvs-src-old.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src-old>,
	<mailto:cvs-src-old-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src-old>
List-Post: <mailto:cvs-src-old@freebsd.org>
List-Help: <mailto:cvs-src-old-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src-old>,
	<mailto:cvs-src-old-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 22 Nov 2008 13:11:18 -0000

kib         2008-11-22 13:11:11 UTC

  FreeBSD src repository

  Modified files:
    sys/ufs/ufs          ufs_lookup.c 
  Log:
  SVN rev 185170 on 2008-11-22 13:11:11Z by kib
  
  Busy ufs filesystem around block of code that does ".." lookup. Since
  mnt_lock is before lock of any vnode on the mp, it uses LK_NOWAIT. Since
  MNTK_UNMOUNT may be transient, pdp lock is dropped when vfs_busy()
  failed, and operation is retried after some time. This way, ffs_vget()
  is not called on the mp that may be in the process of being destroyed by
  unmount.
  
  Check for the VI_DOOMED flag on pdp after its lock is reacquired, to
  better detect some situations where directory containing ".."
  entry is removed during the lookup.
  
  Reviewed by:    tegge, attilio (previous version)
  Tested by:      pho
  MFC after:      1 month
  
  Revision  Changes    Path
  1.93      +26 -1     src/sys/ufs/ufs/ufs_lookup.c