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bpf: allow disabling tunnel csum for ipv6 

Before the patch, BPF_F_ZERO_CSUM_TX can be used only for ipv4 tunnel.
With introduction of ip6gretap collect_md mode, the flag should be also
supported for ipv6.

Signed-off-by: William Tu <u9012063@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2017-12-01 15:26:09 -08:00 committed by David S. Miller
parent 6712abc168
commit b8da518c6e
1 changed files with 3 additions and 2 deletions
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5
net/core/filter.c
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@ -3026,10 +3026,11 @@ BPF_CALL_4(bpf_skb_set_tunnel_key, struct sk_buff *, skb,
IPV6_FLOWLABEL_MASK;
} else {
info->key.u.ipv4.dst = cpu_to_be32(from->remote_ipv4);
if (flags & BPF_F_ZERO_CSUM_TX)
info->key.tun_flags &= ~TUNNEL_CSUM;
}
if (flags & BPF_F_ZERO_CSUM_TX)
info->key.tun_flags &= ~TUNNEL_CSUM;
return 0;
}