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From: Gleb Smirnoff <glebius@FreeBSD.org>
Date: Wed, 2 Nov 2005 15:23:47 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Cc: 
Subject: cvs commit: src/sys/netgraph ng_base.c
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glebius     2005-11-02 15:23:47 UTC

  FreeBSD src repository

  Modified files:
    sys/netgraph         ng_base.c 
  Log:
  Fix two races which happen when netgraph is restructuring:
    - Introduce ng_topo_mtx, a mutex to protect topology changes.
    - In ng_destroy_node() protect with ng_topo_mtx the process
      of checking and pointing at ng_deadnode. [1]
    - In ng_con_part2() check that our peer is not a ng_deadnode,
      and protect the check with ng_topo_mtx.
    - Add KASSERTs to ng_acquire_read/write, to make more
      understandible synopsis in case if called on ng_deadnode.
  
  Reported by:    Roselyn Lee [1]
  
  Revision  Changes    Path
  1.117     +47 -8     src/sys/netgraph/ng_base.c