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Tom Herbert db2ec95d1b ip6_gre: Fix MTU setting 
In ip6gre_tnl_link_config set t->tun_len and t->hlen correctly for the
configuration. For hard_header_len and mtu calculation include
IPv6 header and encapsulation overhead.

In ip6gre_tunnel_init_common set t->tun_len and t->hlen correctly for
the configuration. Revert to setting hard_header_len instead of
needed_headroom.

Tested:

./ip link add name tun8 type ip6gretap remote \
2401:db00:20:911a:face:0:27:0 local \
2401:db00:20:911a:face:0:25:0 ttl 225

Gives MTU of 1434. That is equal to 1500 - 40 - 14 - 4 - 8.

./ip link add name tun8 type ip6gretap remote \
2401:db00:20:911a:face:0:27:0 local \
2401:db00:20:911a:face:0:25:0 ttl 225 okey 123

Gives MTU of 1430. That is equal to 1500 - 40 - 14 - 4 - 8 - 4.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2016-05-10 00:39:27 -04:00
..
6lowpan 6lowpan: move mac802154 header 2016-04-13 10:41:10 +02:00
9p net/9p: convert to new CQ API 2016-03-10 20:54:09 -05:00
802
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8021q vlan: propagate gso_max_segs 2016-03-17 21:05:01 -04:00
appletalk appletalk: fix erroneous return value 2016-02-18 14:59:34 -05:00
atm treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
ax25 ax25: add link layer header validation function 2016-03-09 22:13:01 -05:00
batman-adv In this pull request you have: 2016-05-04 16:21:08 -04:00
bluetooth treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
caif net: caif: fix misleading indentation 2016-03-14 13:09:50 -04:00
can sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
ceph libceph: make authorizer destruction independent of ceph_auth_client 2016-04-25 20:54:13 +02:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
dcb
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dccp dccp: do not assume DCCP code is non preemptible 2016-05-02 17:02:25 -04:00
decnet decnet: Do not build routes to devices without decnet private data. 2016-04-10 23:01:30 -04:00
dns_resolver
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dsa net: dsa: Provide CPU port statistics to master netdev 2016-04-28 17:16:17 -04:00
ethernet eth: Pull header from first fragment via eth_get_headlen 2016-02-24 13:58:05 -05:00
hsr NLA_BINARY misuse bug in HSR 2016-04-21 13:59:08 -04:00
ieee802154 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2016-04-26 13:15:56 -04:00
ipv4 net: l3mdev: Allow send on enslaved interface 2016-05-09 22:33:52 -04:00
ipv6 ip6_gre: Fix MTU setting 2016-05-10 00:39:27 -04:00
ipx
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irda treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
iucv af_iucv: Validate socket address length in iucv_sock_bind() 2016-01-19 14:21:08 -05:00
kcm kcm: Add receive message timeout 2016-03-09 16:36:15 -05:00
key
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l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
l3mdev net: l3mdev: Allow send on enslaved interface 2016-05-09 22:33:52 -04:00
lapb
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llc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
mpls GSO: Add GSO type for fixed IPv4 ID 2016-04-14 16:23:40 -04:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-05-09 15:02:58 -04:00
netlabel netlabel: do not initialise statics to NULL 2016-03-07 11:08:26 -05:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-23 18:51:33 -04:00
netrom
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nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-05-09 15:02:58 -04:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-23 18:51:33 -04:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
qrtr net: Add Qualcomm IPC router 2016-05-08 23:46:14 -04:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
rfkill rfkill: Use switch to demux userspace operations 2016-04-05 10:48:53 +02:00
rose
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rxrpc net: udp: rename UDP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
sched fq_codel: add memory limitation per queue 2016-05-08 23:49:38 -04:00
sctp sctp: prepare for socket backlog behavior change 2016-05-02 17:02:26 -04:00
sunrpc net: udp: rename UDP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
switchdev switchdev: Adding complete operation to deferred switchdev ops 2016-04-24 14:23:32 -04:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
vmw_vsock Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
wimax
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wireless wireless: use nla_put_u64_64bit() 2016-04-25 15:09:11 -04:00
x25
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xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
Kconfig net: Add Qualcomm IPC router 2016-05-08 23:46:14 -04:00
Makefile net: Add Qualcomm IPC router 2016-05-08 23:46:14 -04:00
compat.c
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socket.c tcp: remove SKBTX_ACK_TSTAMP since it is redundant 2016-04-28 16:06:10 -04:00
sysctl_net.c
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