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Hans Schillstrom 714f095f74 ipvs: IPv6 tunnel mode 
IPv6 encapsulation uses a bad source address for the tunnel.
i.e. VIP will be used as local-addr and encap. dst addr.
Decapsulation will not accept this.

Example
LVS (eth1 2003::2:0:1/96, VIP 2003::2:0:100)
   (eth0 2003::1:0:1/96)
RS  (ethX 2003::1:0:5/96)

tcpdump
2003::2:0:100 > 2003::1:0:5: IP6 (hlim 63, next-header TCP (6) payload length: 40)  2003::3:0:10.50991 > 2003::2:0:100.http: Flags [S], cksum 0x7312 (correct), seq 3006460279, win 5760, options [mss 1440,sackOK,TS val 1904932 ecr 0,nop,wscale 3], length 0

In Linux IPv6 impl. you can't have a tunnel with an any cast address
receiving packets (I have not tried to interpret RFC 2473)
To have receive capabilities the tunnel must have:
 - Local address set as multicast addr or an unicast addr
 - Remote address set as an unicast addr.
 - Loop back addres or Link local address are not allowed.

This causes us to setup a tunnel in the Real Server with the
LVS as the remote address, here you can't use the VIP address since it's
used inside the tunnel.

Solution
Use outgoing interface IPv6 address (match against the destination).
i.e. use ip6_route_output() to look up the route cache and
then use ipv6_dev_get_saddr(...) to set the source address of the
encapsulated packet.

Additionally, cache the results in new destination
fields: dst_cookie and dst_saddr and properly check the
returned dst from ip6_route_output. We now add xfrm_lookup
call only for the tunneling method where the source address
is a local one.

Signed-off-by:Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
 		2010-10-19 10:38:48 +02:00
..
9p net/9p: Implement TXATTRCREATE 9p call 2010-08-02 14:28:34 -05:00
bluetooth Bluetooth: Use 3-DH5 payload size for default ERTM max PDU size 2010-08-10 07:59:11 -04:00
caif caif-driver: Add CAIF-SPI Protocol driver. 2010-06-29 00:08:21 -07:00
irda irda: use net_device_stats from struct net_device 2010-08-21 23:32:31 -07:00
iucv include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
netfilter netfilter: ctnetlink: add expectation deletion events 2010-10-19 10:19:06 +02:00
netns ipv6: ip6mr: support multiple tables 2010-05-11 14:40:55 +02:00
phonet phonet: use call_rcu for phonet device free 2010-06-09 16:14:25 -07:00
sctp net/sctp: Use pr_fmt and pr_<level> 2010-08-26 14:11:48 -07:00
tc_act net/sched: add ACT_CSUM action to update packets checksums 2010-08-20 01:42:59 -07:00
tipc tipc: Update commenting in TIPC API 2010-05-12 23:02:23 -07:00
act_api.h pkt_sched: gen_kill_estimator() rcu fixes 2010-06-11 18:37:08 -07:00
addrconf.h net: Add checking to rcu_dereference() primitives 2010-02-25 09:41:03 +01:00
af_ieee802154.h af_ieee802154: add support for WANT_ACK socket option 2009-08-12 21:54:50 -07:00
af_rxrpc.h
…
af_unix.h af_unix: Allow credentials to work across user and pid namespaces. 2010-06-16 14:58:16 -07:00
ah.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
arp.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
atmclip.h
…
ax25.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ax88796.h ax88796: Add method to take MAC from platform data 2009-03-24 23:32:03 -07:00
cfg80211.h cfg80211: allow changing port control protocol 2010-08-27 13:27:07 -04:00
checksum.h
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cipso_ipv4.h netlabel: Label incoming TCP connections correctly in SELinux 2009-03-28 15:01:36 +11:00
cls_cgroup.h cls_cgroup: Fix rcu lockdep warning 2010-09-03 09:55:24 -07:00
compat.h net: fix compat_sys_recvmmsg parameter type 2009-12-11 15:07:56 -08:00
datalink.h
…
dcbnl.h dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops 2009-09-01 01:24:30 -07:00
dn.h
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dn_dev.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
dn_fib.h decnet: Remove unused FIB metric macros. 2010-03-27 19:23:46 -07:00
dn_neigh.h
…
dn_nsp.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
dn_route.h net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
dsa.h dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
dsfield.h
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dst.h net: check for refcount if pop a stacked dst_entry 2010-06-04 15:56:00 -07:00
dst_ops.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
esp.h
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ethoc.h net: Add support for the OpenCores 10/100 Mbps Ethernet MAC. 2009-03-27 00:16:21 -07:00
fib_rules.h net: fib_rules: mark arguments to fib_rules_register const and __net_initdata 2010-04-26 16:02:04 +02:00
flow.h flow: virtualize flow cache entry methods 2010-04-07 03:43:18 -07:00
garp.h
…
gen_stats.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
genetlink.h net: CONFIG_NET_NS reduction 2010-06-02 05:16:23 -07:00
gre.h PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol) 2010-08-21 23:05:39 -07:00
icmp.h ipv4: raw: move struct raw_sock and raw_sk() to include/net/raw.h 2010-04-13 14:49:31 -07:00
ieee80211_radiotap.h wireless: update radiotap parser 2010-02-08 16:50:53 -05:00
ieee802154.h ieee802154: move headers out of extra directory 2009-07-23 17:08:51 +04:00
ieee802154_netdev.h ieee802154: add an mlme_ops call to retrieve PHY object 2009-11-06 14:32:18 +03:00
if_inet6.h ipv6: Replace inet6_ifaddr->dead with state 2010-05-18 15:36:06 -07:00
inet6_connection_sock.h net: replace ipfragok with skb->local_df 2010-04-15 23:36:37 -07:00
inet6_hashtables.h tcp: Fix a connect() race with timewait sockets 2009-12-08 20:17:51 -08:00
inet_common.h inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage() 2010-07-12 20:21:46 -07:00
inet_connection_sock.h tcp: Add TCP_USER_TIMEOUT socket option. 2010-08-30 13:23:33 -07:00
inet_ecn.h net: replace __constant_{endian} uses in net headers 2009-02-14 22:58:35 -08:00
inet_frag.h fragment: add fast path for in-order fragments 2010-06-30 13:44:29 -07:00
inet_hashtables.h tcp: Fix a connect() race with timewait sockets 2009-12-08 20:17:51 -08:00
inet_sock.h net - IP_NODEFRAG option for IPv4 socket 2010-06-23 13:16:38 -07:00
inet_timewait_sock.h net: suppress RCU lockdep false positive in twsk_net() 2010-04-27 12:39:01 -07:00
inetpeer.h inetpeer: restore small inet_peer structures 2010-06-16 11:55:39 -07:00
ip.h net: simplify flags for tx timestamping 2010-08-19 00:08:30 -07:00
ip6_checksum.h
…
ip6_fib.h net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
ip6_route.h net: sk_dst_cache RCUification 2010-04-13 01:41:33 -07:00
ip6_tunnel.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
ip_fib.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-11-06 00:55:55 -08:00
ip_vs.h ipvs: IPv6 tunnel mode 2010-10-19 10:38:48 +02:00
ipcomp.h percpu: add __percpu sparse annotations to net 2010-02-16 23:05:38 -08:00
ipconfig.h
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ipip.h net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
ipv6.h snmp: 64bit ipstats_mib for all arches 2010-06-30 13:31:19 -07:00
ipx.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
iw_handler.h include/net/iw_handler.h: Use SIOCIWFIRST not SIOCSIWCOMMIT in comment 2010-03-31 14:49:12 -04:00
lapb.h
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lib80211.h lib80211: remove unused host_build_iv option 2010-07-26 15:09:04 -04:00
llc.h llc: convert llc_sap_list to RCU 2009-12-26 20:46:28 -08:00
llc_c_ac.h
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llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h llc: use a device based hash table to speed up multicast delivery 2009-12-26 20:43:57 -08:00
llc_if.h
…
llc_pdu.h
…
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
mac80211.h mac80211: support runtime interface type changes 2010-08-27 13:53:31 -04:00
mip6.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
mld.h ipv6 mcast: Introduce include/net/mld.h for MLD definitions. 2010-04-23 13:35:55 +09:00
ndisc.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
neighbour.h net/neighbour.h: fix typo 2010-06-30 12:06:52 -07:00
net_namespace.h nsproxy: remove INIT_NSPROXY() 2010-03-12 15:52:40 -08:00
netdma.h
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netevent.h
…
netlabel.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
netlink.h net: Fix a typo in netlink.h 2010-06-23 12:58:40 -07:00
netrom.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
nexthop.h
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nl802154.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
p8022.h
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pkt_cls.h net: rename skb->iif to skb->skb_iif 2009-11-20 15:35:04 -08:00
pkt_sched.h net: Define accessors to manipulate QDISC_STATE_RUNNING 2010-06-02 03:23:51 -07:00
protocol.h net: drop capability from protocol definitions 2009-11-05 21:40:17 -08:00
psnap.h snap: use const for descriptor 2009-03-21 19:06:50 -07:00
raw.h include/net/raw.h: Convert raw_seq_private macro to inline 2010-09-08 13:42:22 -07:00
rawv6.h ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
red.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
regulatory.h wireless: only use alpha2 regulatory information from country IE 2010-07-20 16:44:35 -04:00
request_sock.h tcp: account SYN-ACK timeouts & retransmissions 2010-01-17 19:09:39 -08:00
rose.h NET: ROSE: Don't use static buffer. 2009-07-26 19:11:14 -07:00
route.h net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
rtnetlink.h rtnetlink: support specifying device flags on device creation 2010-02-27 02:43:40 -08:00
sch_generic.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-07-07 15:59:38 -07:00
scm.h scm: Capture the full credentials of the scm sender. 2010-06-16 14:55:56 -07:00
slhc_vj.h
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snmp.h snmp: 64bit ipstats_mib for all arches 2010-06-30 13:31:19 -07:00
sock.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-09-09 22:27:33 -07:00
stp.h
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tcp.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-09-09 22:27:33 -07:00
tcp_states.h
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timewait_sock.h
…
transp_v6.h IPv6: Add dontfrag argument to relevant functions 2010-04-23 23:35:28 -07:00
udp.h udp: add rehash on connect() 2010-09-08 21:45:01 -07:00
udplite.h
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wext.h wext: refactor 2009-10-07 16:39:43 -04:00
wimax.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
wpan-phy.h ieee802154: add support for creation/removal of logic interfaces 2009-11-06 14:32:24 +03:00
x25.h X25: Move accept approve flag to bitfield 2010-05-17 17:39:27 -07:00
x25device.h X25: Add if_x25.h and x25 to device identifiers 2010-04-22 16:12:36 -07:00
xfrm.h xfrm: fix XFRMA_MARK extraction in xfrm_mark_get 2010-06-30 10:43:31 -07:00