1. 14 Nov, 2017 37 commits
  2. 13 Nov, 2017 3 commits
    • David S. Miller's avatar
      Merge branch 'net-improve-the-process-of-redirect-and-toobig-for-ipv6-tunnels' · ede372dc
      David S. Miller authored
      Xin Long says:
      
      ====================
      net: improve the process of redirect and toobig for ipv6 tunnels
      
      Now let's say there are 3 kinds of icmp packets to process for tunnels,
      toobig(needfrag), redirect, others, their process should be:
      
       - toobig(needfrag)
         update the lower dst's pmtu by route cache, also update sk dst's pmtu
         if possible, or it will be fine if sk dst pmtu will get updated on tx
         path.
      
       - redirect
         update the lower dst's gw by route cache and return, no need to send
         this redirect packet to user sk.
      
       - others
         send the packet to user's sk, or it will also be fine to use err_count
         to count it and report fail link on tx path.
      
      All ipv4 tunnels basically follow this while some of ipv6 tunnels are
      doing in different ways, like ip6gre and ip6_tunnels update tnl dev's
      mtu instead of updating lower dst pmtu, no redirect process on their
      err_handlers, which doesn't make any sense and even causes performance
      problems.
      
      This patchset is to improve the process of redirect and toobig for ip6gre
      ip4ip6, ip6ip6 tunnels, as in ipv4 tunnels.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ede372dc
    • Xin Long's avatar
      ip6_tunnel: clean up ip4ip6 and ip6ip6's err_handlers · 77552cfa
      Xin Long authored
      This patch is to remove some useless codes of redirect and fix some
      indents on ip4ip6 and ip6ip6's err_handlers.
      
      Note that redirect icmp packet is already processed in ip6_tnl_err,
      the old redirect codes in ip4ip6_err actually never worked even
      before this patch. Besides, there's no need to send redirect to
      user's sk, it's for lower dst, so just remove it in this patch.
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      77552cfa
    • Xin Long's avatar
      ip6_tunnel: process toobig in a better way · b00f5432
      Xin Long authored
      The same improvement in "ip6_gre: process toobig in a better way"
      is needed by ip4ip6 and ip6ip6 as well.
      
      Note that ip4ip6 and ip6ip6 will also update sk dst pmtu in their
      err_handlers. Like I said before, gre6 could not do this as it's
      inner proto is not certain. But for all of them, sk dst pmtu will
      be updated in tx path if in need.
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b00f5432