From owner-cvs-all  Tue May 21 13:33:55 2002
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From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Tue, 21 May 2002 13:33:49 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/geom geom.h geom_bsd.c geom_dump.c geom_mbr.c
         geom_subr.c geom_sunlabel.c
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phk         2002/05/21 13:33:49 PDT

  Modified files:
    sys/geom             geom.h geom_bsd.c geom_dump.c geom_mbr.c 
                         geom_subr.c geom_sunlabel.c 
  Log:
  Introduce the concept of "magic spaces", and implement them in most of
  the relevant classes.
  
  Some methods may implement various "magic spaces", this is reserved
  or magic areas on the disk, set a side for various and sundry purposes.
  A good example is the BSD disklabel and boot code on i386 which occupies
  a total of four magic spaces: boot1, the disklabel, the padding behind
  the disklabel and boot2.  The reason we don't simply tell people to
  write the appropriate stuff on the underlying device is that (some of)
  the magic spaces might be real-time modifiable.  It is for instance
  possible to change a disklabel while partitions are open, provided
  the open partitions do not get trampled in the process.
  
  Sponsored by:   DARPA & NAI Labs.
  
  Revision  Changes    Path
  1.17      +30 -0     src/sys/geom/geom.h
  1.15      +15 -1     src/sys/geom/geom_bsd.c
  1.9       +19 -0     src/sys/geom/geom_dump.c
  1.9       +7 -1      src/sys/geom/geom_mbr.c
  1.10      +33 -0     src/sys/geom/geom_subr.c
  1.10      +4 -1      src/sys/geom/geom_sunlabel.c

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