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| author | Xin Long <lucien.xin@gmail.com> | 2017-10-01 16:00:55 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-02 07:30:32 +0200 |
| commit | c122fda271717f4fc618e0a31e833941fd5f1efd (patch) | |
| tree | 3cb94ac33a0d66a34ddeaf8ba7aba32a43788518 /kernel | |
| parent | ip_gre: check packet length and mtu correctly in erspan_xmit (diff) | |
| download | linux-c122fda271717f4fc618e0a31e833941fd5f1efd.tar.xz linux-c122fda271717f4fc618e0a31e833941fd5f1efd.zip | |
ip_gre: set tunnel hlen properly in erspan_tunnel_init
According to __gre_tunnel_init, tunnel->hlen should be set as the
headers' length between inner packet and outer iphdr.
It would be used especially to calculate a proper mtu when updating
mtu in tnl_update_pmtu. Now without setting it, a bigger mtu value
than expected would be updated, which hurts performance a lot.
This patch is to fix it by setting tunnel->hlen with:
tunnel->tun_hlen + tunnel->encap_hlen + sizeof(struct erspanhdr)
Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions