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nfp: flower: set ip tunnel ttl from encap action 

The TTL for encapsulating headers in IPv4 UDP tunnels is taken from a
route lookup. Modify this to first check if a user has specified a TTL to
be used in the TC action.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hurley 2018-08-07 17:35:58 +02:00 committed by David S. Miller
parent 50ee42b9cc
commit 2a43747147
1 changed files with 21 additions and 18 deletions
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39
drivers/net/ethernet/netronome/nfp/flower/action.c
View File

@ -238,18 +238,12 @@ 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;
net = dev_net(netdev);
set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ;
@ -261,19 +255,28 @@ 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;
/* 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);
if (ip_tun->key.ttl) {
set_tun->ttl = ip_tun->key.ttl;
} else {
set_tun->ttl = net->ipv4.sysctl_ip_default_ttl;
struct net *net = dev_net(netdev);
struct flowi4 flow = {};
struct rtable *rt;
int err;
/* 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;
}
}
set_tun->tos = ip_tun->key.tos;