git: sys/vfs/hammer: Change ondisk vol_nblocks/blocksize to reserved

[Tomohiro Kusumi]

commit aa933af86b5d1a8aa5d117dab1281f10fbe5039d
Author: Tomohiro Kusumi <kusumi.tomohiro at gmail.com>
Date:   Sat Mar 26 14:03:55 2016 +0900

    sys/vfs/hammer: Change ondisk vol_nblocks/blocksize to reserved
    
    These were added in fbc6e32a in 2007 in the early stage of HAMMER,
    but vol_nblocks wasn't used after 9480ff55 in 2008. vol_blocksize
    was never used.
    
    HAMMER volumes have these set by newfs_hammer and hammer volume-add,
    but today they are just there for nothing (with obvious values).
    
    The existing HAMMER volumes will keep having vol_nblocks/blocksize
    fields initially set by newfs_hammer or added by hammer volume-add,
    but new volumes created or added from now on will have 0 for these.
    It doesn't erase what's in the existing volume headers.
    
    (There shouldn't be external userspace code that refers to these)

Summary of changes:
 sbin/newfs_hammer/newfs_hammer.c | 3 ---
 sys/vfs/hammer/hammer_disk.h     | 5 ++---
 sys/vfs/hammer/hammer_volume.c   | 3 ---
 3 files changed, 2 insertions(+), 9 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/aa933af86b5d1a8aa5d117dab1281f10fbe5039d


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