Namespacify various ip sysctl knobs

Hello,

This series continues namespacifying more net related knobs. The focus here is on ip options. Patches 1,3,4,5 namespacify the respective sysctl knobs. Patch 2 moves some igmp code to the correct file (and function) and also adds some #ifdef guards to silence compilation warnings.

Finally, patch 5 exposes the ip fragmentation related sysctls since all of the knobs are namespaced.

Nikolay Borisov (6):
ipv4: Namespaceify ip_default_ttl sysctl knob
igmp: net: Move igmp namespace init to correct file
ipv4: Namespacify ip_dynaddr sysctl knob
ipv4: namespacify ip_early_demux sysctl knob
ipv4: namespacify ip fragment max dist sysctl knob
net: Export ip fragment sysctl to unprivileged users

 include/net/inet_frag.h                  |  1 +
 include/net/ip.h                         |  6 ----
 include/net/netns/ipv4.h                 |  4 +++
 include/net/route.h                      |  5 ++--
 net/bridge/netfilter/nft_reject_bridge.c |  8 +++--
 net/ipv4/af_inet.c                       | 10 ++-----
 net/ipv4/igmp.c                          | 14 +++++++++
 net/ipv4/ip_fragment.c                   | 29 +++++++++---------
 net/ipv4/ip_input.c                      |  5 +---
 net/ipv4/ip_output.c                     |  3 --
 net/ipv4/ip_sockglue.c                   |  5 +++-
 net/ipv4/netfilter/ipt_SYNPROXY.c        |  3 +-
 net/ipv4/proc.c                          |  2 +-
 net/ipv4/sysctl_net_ipv4.c               | 50 +++++++++++++++++---------------
 net/ipv4/tcp_ipv4.c                      |  6 ----
 net/ipv6/ip6_input.c                     |  2 +-
 16 files changed, 77 insertions(+), 76 deletions(-)

2.5.0