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nfp: flower: support ipv6 tunnel keep-alive messages from fw

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FW sends an update of IPv6 tunnels that are active in a given period. Use
this information to update the kernel table so that neighbour entries do
not time out when active on the NIC.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hurley 2019-12-17 21:57:23 +00:00 committed by David S. Miller
parent 6c463a059f
commit 9ea9bfa122
4 changed files with 67 additions and 0 deletions
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3
drivers/net/ethernet/netronome/nfp/flower/cmsg.c
View File

@ -278,6 +278,9 @@ nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb)
case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS:
nfp_tunnel_keep_alive(app, skb);
break;
case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS_V6:
nfp_tunnel_keep_alive_v6(app, skb);
break;
case NFP_FLOWER_CMSG_TYPE_QOS_STATS:
nfp_flower_stats_rlim_reply(app, skb);
break;

1
drivers/net/ethernet/netronome/nfp/flower/cmsg.h
View File

@ -574,6 +574,7 @@ enum nfp_flower_cmsg_type_port {
NFP_FLOWER_CMSG_TYPE_TUN_IPS_V6 = 22,
NFP_FLOWER_CMSG_TYPE_NO_NEIGH_V6 = 23,
NFP_FLOWER_CMSG_TYPE_TUN_NEIGH_V6 = 24,
NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS_V6 = 25,
NFP_FLOWER_CMSG_TYPE_MAX = 32,
};

1
drivers/net/ethernet/netronome/nfp/flower/main.h
View File

@ -425,6 +425,7 @@ nfp_tunnel_add_ipv6_off(struct nfp_app *app, struct in6_addr *ipv6);
void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb);
void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb);
void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb);
void nfp_tunnel_keep_alive_v6(struct nfp_app *app, struct sk_buff *skb);
void nfp_flower_lag_init(struct nfp_fl_lag *lag);
void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag);
int nfp_flower_lag_reset(struct nfp_fl_lag *lag);

62
drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
View File

@ -54,6 +54,25 @@ struct nfp_tun_active_tuns {
} tun_info[];
};
/**
* struct nfp_tun_active_tuns_v6 - periodic message of active IPv6 tunnels
* @seq: sequence number of the message
* @count: number of tunnels report in message
* @flags: options part of the request
* @tun_info.ipv6: dest IPv6 address of active route
* @tun_info.egress_port: port the encapsulated packet egressed
* @tun_info: tunnels that have sent traffic in reported period
*/
struct nfp_tun_active_tuns_v6 {
__be32 seq;
__be32 count;
__be32 flags;
struct route_ip_info_v6 {
struct in6_addr ipv6;
__be32 egress_port;
} tun_info[];
};
/**
* struct nfp_tun_neigh - neighbour/route entry on the NFP
* @dst_ipv4: destination IPv4 address
@ -244,6 +263,49 @@ void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb)
rcu_read_unlock();
}
void nfp_tunnel_keep_alive_v6(struct nfp_app *app, struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_IPV6)
struct nfp_tun_active_tuns_v6 *payload;
struct net_device *netdev;
int count, i, pay_len;
struct neighbour *n;
void *ipv6_add;
u32 port;
payload = nfp_flower_cmsg_get_data(skb);
count = be32_to_cpu(payload->count);
if (count > NFP_FL_IPV6_ADDRS_MAX) {
nfp_flower_cmsg_warn(app, "IPv6 tunnel keep-alive request exceeds max routes.\n");
return;
}
pay_len = nfp_flower_cmsg_get_data_len(skb);
if (pay_len != struct_size(payload, tun_info, count)) {
nfp_flower_cmsg_warn(app, "Corruption in tunnel keep-alive message.\n");
return;
}
rcu_read_lock();
for (i = 0; i < count; i++) {
ipv6_add = &payload->tun_info[i].ipv6;
port = be32_to_cpu(payload->tun_info[i].egress_port);
netdev = nfp_app_dev_get(app, port, NULL);
if (!netdev)
continue;
n = neigh_lookup(&nd_tbl, ipv6_add, netdev);
if (!n)
continue;
/* Update the used timestamp of neighbour */
neigh_event_send(n, NULL);
neigh_release(n);
}
rcu_read_unlock();
#endif
}
static int
nfp_flower_xmit_tun_conf(struct nfp_app *app, u8 mtype, u16 plen, void *pdata,
gfp_t flag)