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From: Rick Macklem <rmacklem@FreeBSD.org>
Date: Mon, 18 Jul 2011 21:04:35 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/sys/fs/nfsclient nfs_clstate.c
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rmacklem    2011-07-18 21:04:35 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    sys/fs/nfsclient     nfs_clstate.c 
  Log:
  SVN rev 224203 on 2011-07-18 21:04:35Z by rmacklem
  
  MFC: r223774
  The algorithm used by nfscl_getopen() could have resulted in
  multiple instances of the same lock_owner when a process both
  inherited an open file descriptor plus opened the same file itself.
  Since some NFSv4 servers cannot handle multiple instances of
  the same lock_owner string, this patch changes the algorithm
  used by nfscl_getopen() in the new NFSv4 client to keep that
  from happening. The new algorithm is simpler, since there is
  no longer any need to ascend the process's parentage tree because
  all NFSv4 Closes for a file are done at VOP_INACTIVE()/VOP_RECLAIM(),
  making the Opens indistinct w.r.t. use with Lock Ops.
  This problem was discovered at the recent NFSv4 interoperability
  Bakeathon.
  
  Revision  Changes    Path
  1.7.2.18  +94 -81    src/sys/fs/nfsclient/nfs_clstate.c