From: William Tu <u9012063@gmail.com>
Date: Fri, 1 Dec 2017 15:26:09 -0800
Subject: bpf: allow disabling tunnel csum for ipv6
Patch-mainline: v4.16-rc1
Git-commit: b8da518c6e87504a6790bfb1539134c41b61a45a
References: bsc#1109837
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
net/core/filter.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -3028,10 +3028,11 @@ BPF_CALL_4(bpf_skb_set_tunnel_key, struc
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;
}