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From: Suleiman Souhlal <ssouhlal@FreeBSD.org>
Date: Mon, 15 Aug 2005 06:01:37 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: RELENG_6
Cc: 
Subject: cvs commit: src/sys/kern vfs_subr.c src/sys/sys mount.h vnode.h
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ssouhlal    2005-08-15 06:01:37 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/kern             vfs_subr.c 
    sys/sys              mount.h vnode.h 
  Log:
  MFC:
    Holding a vnode doesn't prevent v_mount from disappearing (when the
    vnode is inactivated), possibly leading to a NULL dereference when
    checking if the mount wants knotes to be activated in the VOP hooks.
    So, we add a new vnode flag VV_NOKNOTE that is only set in  getnewvnode(),
    if necessary, and check it when activating knotes.
    Since the flags are not erased when a vnode is being held, we can safely
    read them.
  
  Approved by:    re (kensmith)
  
  Revision   Changes    Path
  1.635.2.1  +2 -0      src/sys/kern/vfs_subr.c
  1.197.2.1  +2 -4      src/sys/sys/mount.h
  1.304.2.1  +1 -0      src/sys/sys/vnode.h