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| author | Tom Herbert <tom@herbertland.com> | 2016-05-10 00:12:08 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-10 04:39:27 (GMT) |
| commit | db2ec95d1ba419b766aae7b1d7c0271f3c9cd9f4 (patch) | |
| tree | ef6c5a38b5a944b9588b967f98715cc77b090654 /Kbuild | |
| parent | bfca2eba2adaa9501656f503559a971de6927fa8 (diff) | |
| download | linux-db2ec95d1ba419b766aae7b1d7c0271f3c9cd9f4.tar.xz | |
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>
Diffstat (limited to 'Kbuild')
0 files changed, 0 insertions, 0 deletions