git: radix: Fix the non-per-cpu radix tree usage.

[Sepherosa Ziehau <sephe@xxxxxxxxxxxxxxxxxxxxxxx>]

commit b4628cf91a5f54965e6a4221f243e315aa7a6860
Author: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date:   Tue Feb 1 16:09:26 2011 +0800

    radix: Fix the non-per-cpu radix tree usage.
    
    - Install a mask radix tree in each radix tree, while, mask radix tree does
      not have mask radix tree (of course).
    - rn_cpumaskhead() is added to provide the global per-cpu mask radix tree.
    - rn_inithead() requires a mask radix tree as paramter.  Mask radix tree is
      initialized by passing NULL.  INET/INET6/ATALK pass the mask radix tree
      obtained from rn_cpumaskhead(), i.e. the old sementics.
    - pf(4) now creates its own mask radix tree, and all of its internal radix
      trees will use that mask radix tree instead of the global per-cpu mask
      radix tree.  pf(4) radix tree operations are protected by its own token.
    - rn_addmask() requires a mask radix tree, instead of using the global
      per-cpu mask radix tree.  For most cases, the caller has access to the
      radix tree that has a mask radix tree installed.  For _rtmask_lookup(),
      which is always called from route_output(), we could safely assume that
      global per-cpu mask radix tree is used.
    
    This is mainly used to fix the following bug concerning global per-cpu
    mask radix tree:
    Before this commit, pf(4) could create mask on CPU0's mask radix tree,
    while the deletion of the mask happens on other CPUs, which results pf(4)'s
    radix tree operation to fail (can't locate the mask).
    
    Dragonfly-bug: http://bugs.dragonflybsd.org/issue1969
    Root-cause-found-by: Jan Lentfer <Jan.Lentfer@web.de>

Summary of changes:
 sys/net/pf/pf.c             |    3 +++
 sys/net/pf/pf_ioctl.c       |   21 +++++++++++++++++++++
 sys/net/pf/pf_table.c       |    5 +++--
 sys/net/pf/pfvar.h          |    1 +
 sys/net/radix.c             |   25 ++++++++++++++++++-------
 sys/net/radix.h             |    8 ++++++--
 sys/net/route.c             |    2 +-
 sys/netinet/in_rmx.c        |    2 +-
 sys/netinet6/in6_rmx.c      |    2 +-
 sys/netproto/atalk/at_rmx.c |    2 +-
 10 files changed, 56 insertions(+), 15 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b4628cf91a5f54965e6a4221f243e315aa7a6860


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