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linux-stable/net/ipv6
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Sascha Hlusiak 8945a808f7 sit: allow ip fragmentation when using nopmtudisc to fix package loss 
if tunnel parameters have frag_off set to IP_DF, pmtudisc on the ipv4 link
will be performed by deriving the mtu from the ipv4 link and setting the
DF-Flag of the encapsulating IPv4 Header. If fragmentation is needed on the
way, the IPv4 pmtu gets adjusted, the ipv6 package will be resent eventually,
using the new and lower mtu and everyone is happy.

If the frag_off parameter is unset, the mtu for the tunnel will be derived
from the tunnel device or the ipv6 pmtu, which might be higher than the ipv4
pmtu. In that case we must allow the fragmentation of the IPv4 packet because
the IPv6 mtu wouldn't 'learn' from the adjusted IPv4 pmtu, resulting in
frequent icmp_frag_needed and package loss on the IPv6 layer.

This patch allows fragmentation when tunnel was created with parameter
nopmtudisc, like in ipip/gre tunnels.

Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-28 23:53:53 -07:00
..
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-06-11 16:00:49 +02:00
addrconf.c IPv6: preferred lifetime of address not getting updated 2009-07-03 19:10:13 -07:00
addrconf_core.c
addrlabel.c net: replace %p6 with %pI6 2008-10-29 12:52:50 -07:00
af_inet6.c udpv6: Handle large incoming UDP/IPv6 packets and support software UFO 2009-07-12 14:29:29 -07:00
ah6.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
anycast.c net: replace %#p6 format specifier with %pi6 2008-10-29 12:50:24 -07:00
datagram.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
esp6.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
exthdrs.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
exthdrs_core.c
fib6_rules.c net: Remove unused parameter from fill method in fib_rules_ops. 2009-05-20 17:26:23 -07:00
icmp.c inet6: Conversion from u8 to int 2009-08-13 16:43:31 -07:00
inet6_connection_sock.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet6_hashtables.c ipv6: don't use tw net when accounting for recycled tw 2009-02-26 03:35:13 -08:00
ip6_fib.c xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00
ip6_flowlabel.c ipv6: Disallow rediculious flowlabel option sizes. 2009-02-06 00:49:55 -08:00
ip6_input.c ipv6: correct return on ipv6_rcv() packet drop 2009-07-06 18:07:55 -07:00
ip6_output.c inet6: Conversion from u8 to int 2009-08-13 16:43:31 -07:00
ip6_tunnel.c net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions 2009-07-05 19:16:04 -07:00
ip6mr.c net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions 2009-07-05 19:16:04 -07:00
ipcomp6.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
ipv6_sockglue.c inet6: Set default traffic class 2009-08-13 16:43:32 -07:00
Kconfig trivial: Kconfig: .ko is normally not included in module names 2009-06-12 18:01:50 +02:00
Makefile [IPV6] MROUTE: Support multicast forwarding. 2008-04-05 22:33:38 +09:00
mcast.c mcastv6: Local variable shadows function argument 2009-07-21 11:13:25 -07:00
mip6.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
ndisc.c ipv6: Log the explicit address that triggered DAD failure 2009-08-13 16:26:10 -07:00
netfilter.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
proc.c net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
protocol.c net: remove CVS keywords 2008-06-11 21:00:38 -07:00
raw.c inet6: Conversion from u8 to int 2009-08-13 16:43:31 -07:00
reassembly.c ipv6: Use frag list abstraction interfaces. 2009-06-09 00:20:05 -07:00
route.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
sit.c sit: allow ip fragmentation when using nopmtudisc to fix package loss 2009-08-28 23:53:53 -07:00
syncookies.c syncookies: remove last_synq_overflow from struct tcp_sock 2009-04-20 02:25:26 -07:00
sysctl_net_ipv6.c inet6: functions shadow global variable 2009-08-02 12:54:30 -07:00
tcp_ipv6.c tcp: Use correct peer adr when copying MD5 keys 2009-07-20 07:49:08 -07:00
tunnel6.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
udp.c inet6: Conversion from u8 to int 2009-08-13 16:43:31 -07:00
udp_impl.h ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
udplite.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
xfrm6_input.c netns xfrm: per-netns MIBs 2008-11-25 17:59:52 -08:00
xfrm6_mode_beet.c ipsec: Interfamily IPSec BEET, ipv4-inner ipv6-outer 2008-08-06 02:40:25 -07:00
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
xfrm6_output.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
xfrm6_policy.c xfrm6: Fix xfrm6_policy.c build when SYSCTL disabled. 2009-08-04 20:32:16 -07:00
xfrm6_state.c ipv6: fix sparse warning: Using plain integer as NULL pointer 2009-02-21 23:37:10 -08:00
xfrm6_tunnel.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00