git: icmp: Asynchonize ctlinput/mtudisc/redirect processing

[Sepherosa Ziehau]

commit 130b7902de98ca52e39d03d35a30d759df0cc2fc
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Mon Nov 24 09:59:41 2014 +0800

    icmp: Asynchonize ctlinput/mtudisc/redirect processing
    
    Supportive facilities added:
    - Embed netmsg_ctlinput into mbuf (used by input ICMP datagram) so that
      we don't need to do additional memory allocation to forward the
      pr_ctlinput to all netisrs for certain types of ICMP datagrams.
    - Add/Expose so_pr_ctlport().
    - Return target netisr's cpuid from pr_ctlport.  If the returned cpuid
      equals to ncpus, it means that pr_ctlinput needs to be run in all
      netisrs.
    - Support 'direct' mode for TCP/UDP's pr_ctlinput.  The caller of the
      'direct' mode pr_ctlinput will do the message forwarding.
    
    ICMP pr_ctlinput/mtudisc/redirect processing changes:
    - For mtudisc and redirect we unconditionally forward the message
      embedded in input ICMP datagram to all netisrs, and call pr_ctlinput
      in 'direct' mode.
    - For pr_ctlinput, we first call so_pr_ctlport() to see whether we need
      to forward the message embedded in input ICMP datagram to all netisrs,
      and act accordingly.
    - Once pr_ctlinput/mtudisc/redirect processing is done, the message
      embedded in the input ICMP datagram is forwarded back to the netisr0
      to run rip_input().
    
    After this commit, netisr0 will not be blocked for ICMP pr_ctlinput/
    mtudisc/redirect processing.  This also fixes the mtudisc (originally
    only cpu0's routes get mtu updates).

Summary of changes:
 sys/kern/uipc_domain.c   |  12 ++
 sys/kern/uipc_msg.c      |  45 ++++-
 sys/net/netisr.c         |   5 +-
 sys/net/netmsg.h         |  10 +
 sys/net/route.c          |   2 +-
 sys/net/route.h          |   2 +
 sys/netinet/ip_demux.c   |  23 ++-
 sys/netinet/ip_icmp.c    | 465 ++++++++++++++++++++++++++++++++++++++++-------
 sys/netinet/tcp_subr.c   |  14 +-
 sys/netinet/tcp_var.h    |   2 +-
 sys/netinet/udp_usrreq.c |  15 +-
 sys/netinet/udp_var.h    |   2 +-
 sys/sys/mbuf.h           |   4 +-
 sys/sys/protosw.h        |   5 +-
 sys/sys/socketops.h      |   6 +
 15 files changed, 520 insertions(+), 92 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/130b7902de98ca52e39d03d35a30d759df0cc2fc


-- 
DragonFly BSD source repository