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From: Rick Macklem <rmacklem@FreeBSD.org>
Date: Fri, 16 Jul 2010 23:17:05 +0000 (UTC)
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Subject: cvs commit: src/sys/fs/nfsserver nfs_nfsdstate.c
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rmacklem    2010-07-16 23:17:05 UTC

  FreeBSD src repository

  Modified files:
    sys/fs/nfsserver     nfs_nfsdstate.c 
  Log:
  SVN rev 210178 on 2010-07-16 23:17:05Z by rmacklem
  
  Patch the experimental NFSv4 server so that it acquires a reference
  count on nfsv4rootfs_lock when dumping state, since these functions
  are not called by nfsd threads. Without this reference count, it
  is possible for an nfsd thread to acquire an exclusive lock on
  nfsv4rootfs_lock while the dump is in progress and then change the
  lists, potentially causing a crash.
  
  Reported by:    zack.kirsch at isilon.com
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.18      +23 -0     src/sys/fs/nfsserver/nfs_nfsdstate.c