linux/net/ipv6
Tom Herbert de551f2eb2 net: Build IPv6 into kernel by default
This patch makes the default to build IPv6 into the kernel. IPv6
now has significant traction and any remaining vestiges of IPv6
not being provided parity with IPv4 should be swept away. IPv6 is now
core to the Internet and kernel.

Points on IPv6 adoption:

- Per Google statistics, IPv6 usage has reached 7% on the Internet
  and continues to exhibit an exponential growth rate
  https://www.google.com/intl/en/ipv6/statistics.html
- Just a few days ago ARIN officially depleted its IPv4 pool
- IPv6 only data centers are being successfully built
  (e.g. at Facebook)

This patch changes the IPv6 Kconfig for IPV6. Default for CONFIG_IPV6
is set to "y" and the text has been updated to reflect the maturity of
IPv6.

Impact:

Under some circumstances building modules in to kernel might have a
performance advantage. In my testing, I did notice a very slight
improvement.

This will obviously increase the size of the kernel image. In my
configuration I see:

IPv6 as module:

   text    data     bss     dec     hex filename
9703666 1899288  933888 12536842         bf4c0a vmlinux

IPv6 built into kernel

  text     data     bss     dec     hex filename
9436490 1879600  913408 12229498         ba9b7a vmlinux

Which increases text size by ~270K (2.8% increase in size for me). If
image size is an issue, presumably for a device which does not do IP
networking (IMO we should be discouraging IPv4-only devices), IPV6 can
be disabled or still built as a module.

Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-13 13:10:21 -07:00
..
netfilter netfilter: x_tables: remove XT_TABLE_INFO_SZ and a dereference. 2015-06-15 20:19:20 +02:00
addrconf.c ipv6: Do not iterate over all interfaces when finding source address on specific interface. 2015-07-10 23:19:25 -07:00
addrconf_core.c ipv6: fix possible use after free of dev stats 2015-06-08 12:12:45 -07:00
addrlabel.c
af_inet6.c ipv6: Nonlocal bind 2015-07-09 21:09:10 -07:00
ah6.c
anycast.c
datagram.c ipv6: use flag instead of u16 for hop in inet6_skb_parm 2015-07-09 15:06:59 -07:00
esp6.c esp6: Switch to new AEAD interface 2015-05-28 11:23:20 +08:00
exthdrs.c ipv6: use flag instead of u16 for hop in inet6_skb_parm 2015-07-09 15:06:59 -07:00
exthdrs_core.c
exthdrs_offload.c
fib6_rules.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-04-06 22:34:15 -04:00
icmp.c ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST 2015-05-25 13:25:33 -04:00
inet6_connection_sock.c
inet6_hashtables.c inet: inet_twsk_deschedule factorization 2015-07-09 15:12:20 -07:00
ip6_checksum.c
ip6_fib.c ipv6: Create percpu rt6_info 2015-05-25 13:25:35 -04:00
ip6_flowlabel.c ipv6: Flow label state ranges 2015-05-03 21:58:01 -04:00
ip6_gre.c ip6_gre: use netdev_alloc_pcpu_stats() 2015-04-22 15:39:05 -04:00
ip6_icmp.c
ip6_input.c ipv6: Make MLD packets to only be processed locally 2015-07-03 09:52:38 -07:00
ip6_offload.c
ip6_offload.h
ip6_output.c ipv6: don't increase size when refragmenting forwarded ipv6 skbs 2015-05-25 17:22:23 -04:00
ip6_tunnel.c ipv6: Add rt6_get_cookie() function 2015-05-25 13:25:34 -04:00
ip6_udp_tunnel.c net: Modify sk_alloc to not reference count the netns of kernel sockets. 2015-05-11 10:50:18 -04:00
ip6_vti.c vti6: Add pmtu handling to vti6_xmit. 2015-06-01 16:03:43 -07:00
ip6mr.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
ipcomp6.c
ipv6_sockglue.c
Kconfig net: Build IPv6 into kernel by default 2015-07-13 13:10:21 -07:00
Makefile net: Export IGMP/MLD message validation code 2015-05-04 14:49:23 -04:00
mcast.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
mcast_snoop.c net: fix two sparse warnings introduced by IGMP/MLD parsing exports 2015-05-04 19:19:54 -04:00
mip6.c
ndisc.c ipv6: Remove external dependency on rt6i_dst and rt6i_src 2015-05-25 13:25:32 -04:00
netfilter.c netfilter: bridge: forward IPv6 fragmented packets 2015-06-12 14:10:12 +02:00
output_core.c netfilter: don't pull include/linux/netfilter.h from netns headers 2015-06-18 21:14:31 +02:00
ping.c
proc.c
protocol.c
raw.c ipv6: Nonlocal bind 2015-07-09 21:09:10 -07:00
reassembly.c
route.c net-ipv6: Delete an unnecessary check before the function call "free_percpu" 2015-07-03 09:27:42 -07:00
sit.c ipv6: call iptunnel_xmit with NULL sock pointer if no tunnel sock is available 2015-04-08 12:09:43 -04:00
syncookies.c tcp: get_cookie_sock() consolidation 2015-06-07 15:19:52 -07:00
sysctl_net_ipv6.c ipv6: Nonlocal bind 2015-07-09 21:09:10 -07:00
tcp_ipv6.c inet: inet_twsk_deschedule factorization 2015-07-09 15:12:20 -07:00
tcpv6_offload.c
tunnel6.c
udp.c udp: fix behavior of wrong checksums 2015-05-31 21:42:18 -07:00
udp_impl.h
udp_offload.c
udplite.c
xfrm6_input.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
xfrm6_policy.c ipv6: Add rt6_get_cookie() function 2015-05-25 13:25:34 -04:00
xfrm6_protocol.c
xfrm6_state.c
xfrm6_tunnel.c