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From: Hiroki Sato <hrs@FreeBSD.org>
Date: Sun, 31 Jan 2010 08:16:37 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/net if_bridge.c
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hrs         2010-01-31 08:16:37 UTC

  FreeBSD src repository

  Modified files:
    sys/net              if_bridge.c 
  Log:
  SVN rev 203272 on 2010-01-31 08:16:37Z by hrs
  
  - Check if_type of "addm <interface>" before setting the
    interface's MTU to the if_bridge(4) interface.  This fixes a
    bug that MTU value of "addm <interface>" is used even when it
    is invalid for the if_bridge(4) member:
  
    # ifconfig bridge0 create
    # ifconfig bridge0
    bridge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
    ...
    # ifconfig bridge0 addm lo0
    ifconfig: BRDGADD lo0: Invalid argument
    # ifconfig bridge0
    bridge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 16384
    ...
  
  - Do not ignore MTU value of an interface even when if_type == IFT_GIF.
    This fixes MTU mismatch when an if_bridge(4) interface has a
    gif(4) interface and no other interface as the member, and it
    is directly used for L2 communication with EtherIP tunneling
    enabled.
  
  - Implement SIOCSIFMTU ioctl.  Changing the MTU is allowed only
    when all members have the same MTU value.
  
  Revision  Changes    Path
  1.139     +34 -14    src/sys/net/if_bridge.c