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linux/net/ipv6
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William Dauchy 5fdcce211b net, ip6_tunnel: enhance tunnel locate with link check 
With ipip, it is possible to create an extra interface explicitly
attached to a given physical interface:

  # ip link show tunl0
  4: tunl0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0
  # ip link add tunl1 type ipip dev eth0
  # ip link show tunl1
  6: tunl1@eth0: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0

But it is not possible with ip6tnl:

  # ip link show ip6tnl0
  5: ip6tnl0@NONE: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default qlen 1000
      link/tunnel6 :: brd ::
  # ip link add ip6tnl1 type ip6tnl dev eth0
  RTNETLINK answers: File exists

This patch aims to make it possible by adding link comparaison in both
tunnel locate and lookup functions; we also modify mtu calculation when
attached to an interface with a lower mtu.

This permits to make use of x-netns communication by moving the newly
created tunnel in a given netns.

Signed-off-by: William Dauchy <w.dauchy@criteo.com>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-14 07:31:48 -08:00
..
ila
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
netfilter
net: Fix Kconfig indentation, continued
2019-11-21 12:00:21 -08:00
addrconf_core.c
net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup
2019-12-04 12:27:13 -08:00
addrconf.c
ipv6/addrconf: fix potential NULL deref in inet6_set_link_af()
2020-02-07 18:43:23 +01:00
addrlabel.c
netlink: make validation more configurable for future strictness
2019-04-27 17:07:21 -04:00
af_inet6.c
net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup
2019-12-04 12:27:13 -08:00
ah6.c
ipv6: Use ipv6_authlen for len
2019-07-11 14:43:25 -07:00
anycast.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
calipso.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
datagram.c
net: ipv6: add net argument to ip6_dst_lookup_flow
2019-12-04 12:27:12 -08:00
esp6_offload.c
xfrm: support output_mark for offload ESP packets
2020-01-15 12:18:35 +01:00
esp6.c
xfrm: remove get_mtu indirection from xfrm_type
2019-07-01 06:16:40 +02:00
exthdrs_core.c
ipv6: remove printk
2019-07-27 14:23:48 -07:00
exthdrs_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
exthdrs.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
fib6_notifier.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib6_rules.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fou6.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
icmp.c
net: icmp6: provide input address for traceroute6
2019-11-03 17:26:53 -08:00
inet6_connection_sock.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2019-12-24 22:28:54 -08:00
inet6_hashtables.c
net: annotate accesses to sk->sk_incoming_cpu
2019-10-30 13:24:25 -07:00
ip6_checksum.c
net: udp: fix handling of CHECKSUM_COMPLETE packets
2018-10-24 14:18:16 -07:00
ip6_fib.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-01-26 10:40:21 +01:00
ip6_flowlabel.c
ipv6: fix static key imbalance in fl_create()
2019-07-11 14:43:25 -07:00
ip6_gre.c
net: ip6_gre: fix moving ip6gre between namespaces
2020-01-20 09:59:24 +01:00
ip6_icmp.c
icmp: introduce helper for nat'd source address in network device context
2020-02-13 14:19:00 -08:00
ip6_input.c
ipv6: introduce and uses route look hints for list input.
2019-11-21 14:45:55 -08:00
ip6_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ip6_offload.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ip6_output.c
net: ipv6: add net argument to ip6_dst_lookup_flow
2019-12-04 12:27:12 -08:00
ip6_tunnel.c
net, ip6_tunnel: enhance tunnel locate with link check
2020-02-14 07:31:48 -08:00
ip6_udp_tunnel.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
ip6_vti.c
vti[6]: fix packet tx through bpf_redirect()
2020-01-14 08:55:38 +01:00
ip6mr.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
ipcomp6.c
xfrm: remove type and offload_type map from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00
ipv6_sockglue.c
net-ipv6: IPV6_TRANSPARENT - check NET_RAW prior to NET_ADMIN
2019-11-21 19:15:20 -08:00
Kconfig
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
Makefile
xfrm: make xfrm modes builtin
2019-04-08 09:15:17 +02:00
mcast_snoop.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 343
2019-06-05 17:37:07 +02:00
mcast.c
mld: fix memory leak in mld_del_delrec()
2019-08-28 14:47:35 -07:00
mip6.c
xfrm: remove type and offload_type map from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00
ndisc.c
net-ipv6-ndisc: add support for RFC7710 RA Captive Portal Identifier
2019-07-22 12:10:54 -07:00
netfilter.c
net: ensure correct skb->tstamp in various fragmenters
2019-10-18 10:02:37 -07:00
output_core.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
ping.c
ipv6: Fix the link time qualifier of 'ping_v6_proc_exit_net()'
2019-09-12 11:20:33 +01:00
proc.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-06-07 11:00:14 -07:00
protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
raw.c
net: ipv6: add net argument to ip6_dst_lookup_flow
2019-12-04 12:27:12 -08:00
reassembly.c
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
route.c
ipv6: Add "offload" and "trap" indications to routes
2020-01-14 18:53:35 -08:00
seg6_hmac.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6_iptunnel.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6_local.c
ipv6: sr: remove SKB_GSO_IPXIP6 on End.D* actions
2020-01-21 10:17:07 +01:00
seg6.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
sit.c
sit: do not confirm neighbor when do pmtu update
2019-12-24 22:28:55 -08:00
syncookies.c
mptcp: handle tcp fallback when using syn cookies
2020-01-29 17:45:20 +01:00
sysctl_net_ipv6.c
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
tcp_ipv6.c
mptcp: Fix undefined mptcp_handle_ipv6_mapped for modular IPV6
2020-01-30 10:55:54 +01:00
tcpv6_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tunnel6.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
udp_impl.h
udp6: add missing rehash callback to udplite
2019-01-17 15:01:08 -08:00
udp_offload.c
udp: Support UDP fraglist GRO/GSO.
2020-01-27 11:00:21 +01:00
udp.c
net: udp: use skb_list_walk_safe helper for gso segments
2020-01-14 11:48:41 -08:00
udplite.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
xfrm6_input.c
net: use skb_sec_path helper in more places
2018-12-19 11:21:37 -08:00
xfrm6_output.c
netfilter: Support iif matches in POSTROUTING
2019-11-15 23:44:48 +01:00
xfrm6_policy.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2019-12-24 22:28:54 -08:00
xfrm6_protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
xfrm6_state.c
xfrm: remove eth_proto value from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00
xfrm6_tunnel.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00