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From: Kirk McKusick <mckusick@FreeBSD.org>
Date: Tue, 17 Dec 2002 14:36:33 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/sys conf.h src/sys/ufs/ufs inode.h
         src/sys/ufs/ffs ffs_snapshot.c
X-FreeBSD-CVS-Branch: RELENG_5_0
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mckusick    2002/12/17 14:36:33 PST

  Modified files:        (Branch: RELENG_5_0)
    sys/sys              conf.h 
    sys/ufs/ufs          inode.h 
    sys/ufs/ffs          ffs_snapshot.c 
  Log:
  Only the most recent snapshot contains the complete list of blocks
  that were copied in all of the earlier snapshots, thus its precomputed
  list must be used in the copyonwrite test. Using incomplete lists may
  lead to deadlock. Also do not include the blocks used for the indirect
  pointers in the indirect pointers as this may lead to inconsistent
  snapshots.
  
  Reviewed by:    Ian Dowse <iedowse@maths.tcd.ie>
  Sponsored by:   DARPA & NAI Labs.
  Approved by:    re
  MFC from:       src/sys/sys/conf.h 1.151
  MFC from:       src/sys/ufs/ufs/inode.h 1.42 & 1.43
  MFC from:       src/sys/ufs/ffs/ffs_snapshot.c 1.54 & 1.55
  
  Revision   Changes    Path
  1.150.2.1  +8 -2      src/sys/sys/conf.h
  1.53.2.1   +183 -135  src/sys/ufs/ffs/ffs_snapshot.c
  1.41.2.1   +6 -3      src/sys/ufs/ufs/inode.h

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