GEOM_MBR patch for review.

[Poul-Henning Kamp]

Go for it!

In message <20050120213418.GT795 at darkness.comp.waw.pl>, Pawel Jakub Dawidek wri
tes:
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>Hello.
>
>Patch below allows to protect against recursive slices creation in simlar
>way as BSD class does this, ie. by calculating md5 sum of the first sector
>and checking if provider below us is using metadata from the same sector.
>
>	http://people.freebsd.org/~pjd/patches/geom_mbr.c.2.patch
>
>It allows to remove hack for geoms with rank !=3D 1.
>Comments?
>
>--=20
>Pawel Jakub Dawidek                       http://www.wheel.pl
>pjd at FreeBSD.org                           http://www.FreeBSD.org
>FreeBSD committer                         Am I Evil? Yes, I Am!
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-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.