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| author | John Hurley <john.hurley@netronome.com> | 2018-06-29 17:04:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-30 21:31:56 +0900 |
| commit | ed21b637e940e7680fc52eb10a5d9ee74715cd38 (patch) | |
| tree | ec3ca8157a7e180a73587c510336797e59360f87 | |
| parent | ed8f2b52b622bbc550dadb69d3f10d81528f9fbc (diff) | |
| download | linux-stable-ed21b637e940e7680fc52eb10a5d9ee74715cd38.tar.gz linux-stable-ed21b637e940e7680fc52eb10a5d9ee74715cd38.tar.bz2 linux-stable-ed21b637e940e7680fc52eb10a5d9ee74715cd38.zip | |
nfp: flower: extract ipv4 udp tunnel ttl from route
Previously the ttl for ipv4 udp tunnels was set to the namespace default.
Modify this to attempt to extract the ttl from a full route lookup on the
tunnel destination. If this is not possible then resort to the default.
Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/flower/action.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c b/drivers/net/ethernet/netronome/nfp/flower/action.c index 61ba8d4f99f1..d421b7fbce96 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/action.c +++ b/drivers/net/ethernet/netronome/nfp/flower/action.c @@ -236,9 +236,12 @@ nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun, size_t act_size = sizeof(struct nfp_fl_set_ipv4_udp_tun); struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action); u32 tmp_set_ip_tun_type_index = 0; + struct flowi4 flow = {}; /* Currently support one pre-tunnel so index is always 0. */ int pretun_idx = 0; + struct rtable *rt; struct net *net; + int err; if (ip_tun->options_len) return -EOPNOTSUPP; @@ -255,7 +258,21 @@ nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun, set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index); set_tun->tun_id = ip_tun->key.tun_id; - set_tun->ttl = net->ipv4.sysctl_ip_default_ttl; + + /* Do a route lookup to determine ttl - if fails then use default. + * Note that CONFIG_INET is a requirement of CONFIG_NET_SWITCHDEV so + * must be defined here. + */ + flow.daddr = ip_tun->key.u.ipv4.dst; + flow.flowi4_proto = IPPROTO_UDP; + rt = ip_route_output_key(net, &flow); + err = PTR_ERR_OR_ZERO(rt); + if (!err) { + set_tun->ttl = ip4_dst_hoplimit(&rt->dst); + ip_rt_put(rt); + } else { + set_tun->ttl = net->ipv4.sysctl_ip_default_ttl; + } /* Complete pre_tunnel action. */ pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst; |