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authorDaniel Borkmann <daniel@iogearbox.net>2016-03-09 03:00:02 +0100
committerDavid S. Miller <davem@davemloft.net>2016-03-11 15:14:26 -0500
commit134611446dc657e1bbc73ca0e4e6b599df687db0 (patch)
tree4a737866a24d8f515b09acda069ab422fe28344b
parente327f4e193b6a176f4dc3b19faf6371a8917588d (diff)
downloadlinux-134611446dc657e1bbc73ca0e4e6b599df687db0.tar.bz2
ip_tunnel: add support for setting flow label via collect metadata
This patch extends udp_tunnel6_xmit_skb() to pass in the IPv6 flow label from call sites. Currently, there's no such option and it's always set to zero when writing ip6_flow_hdr(). Add a label member to ip_tunnel_key, so that flow-based tunnels via collect metadata frontends can make use of it. vxlan and geneve will be converted to add flow label support separately. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/geneve.c2
-rw-r--r--drivers/net/vxlan.c2
-rw-r--r--include/net/dst_metadata.h5
-rw-r--r--include/net/ip_tunnels.h4
-rw-r--r--include/net/udp_tunnel.h4
-rw-r--r--net/ipv6/ip6_udp_tunnel.c6
-rw-r--r--net/tipc/udp_media.c2
7 files changed, 15 insertions, 10 deletions
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index 6a0cbbe03e5d..89ccff79d76c 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -1054,7 +1054,7 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
ttl = ttl ? : ip6_dst_hoplimit(dst);
}
udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
- &fl6.saddr, &fl6.daddr, prio, ttl,
+ &fl6.saddr, &fl6.daddr, prio, ttl, 0,
sport, geneve->dst_port,
!!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX));
return NETDEV_TX_OK;
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 2399099e68cf..8bdcd5ea8424 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2066,7 +2066,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
return;
}
udp_tunnel6_xmit_skb(ndst, sk, skb, dev,
- &saddr, &dst->sin6.sin6_addr, tos, ttl,
+ &saddr, &dst->sin6.sin6_addr, tos, ttl, 0,
src_port, dst_port, !udp_sum);
#endif
}
diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h
index 84b833af6882..5db9f5910428 100644
--- a/include/net/dst_metadata.h
+++ b/include/net/dst_metadata.h
@@ -126,7 +126,7 @@ static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb,
ip_tunnel_key_init(&tun_dst->u.tun_info.key,
iph->saddr, iph->daddr, iph->tos, iph->ttl,
- 0, 0, tunnel_id, flags);
+ 0, 0, 0, tunnel_id, flags);
return tun_dst;
}
@@ -152,8 +152,11 @@ static inline struct metadata_dst *ipv6_tun_rx_dst(struct sk_buff *skb,
info->key.u.ipv6.src = ip6h->saddr;
info->key.u.ipv6.dst = ip6h->daddr;
+
info->key.tos = ipv6_get_dsfield(ip6h);
info->key.ttl = ip6h->hop_limit;
+ info->key.label = ip6_flowlabel(ip6h);
+
return tun_dst;
}
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index 0acd80fadb32..5dc2e454f866 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -48,6 +48,7 @@ struct ip_tunnel_key {
__be16 tun_flags;
u8 tos; /* TOS for IPv4, TC for IPv6 */
u8 ttl; /* TTL for IPv4, HL for IPv6 */
+ __be32 label; /* Flow Label for IPv6 */
__be16 tp_src;
__be16 tp_dst;
};
@@ -181,7 +182,7 @@ int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op,
static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
__be32 saddr, __be32 daddr,
- u8 tos, u8 ttl,
+ u8 tos, u8 ttl, __be32 label,
__be16 tp_src, __be16 tp_dst,
__be64 tun_id, __be16 tun_flags)
{
@@ -192,6 +193,7 @@ static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
key->tos = tos;
key->ttl = ttl;
+ key->label = label;
key->tun_flags = tun_flags;
/* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
index 97f5adb121a6..b83114077cee 100644
--- a/include/net/udp_tunnel.h
+++ b/include/net/udp_tunnel.h
@@ -88,8 +88,8 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr,
- __u8 prio, __u8 ttl, __be16 src_port,
- __be16 dst_port, bool nocheck);
+ __u8 prio, __u8 ttl, __be32 label,
+ __be16 src_port, __be16 dst_port, bool nocheck);
#endif
void udp_tunnel_sock_release(struct socket *sock);
diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c
index 14dacf1df529..a7520528ecd2 100644
--- a/net/ipv6/ip6_udp_tunnel.c
+++ b/net/ipv6/ip6_udp_tunnel.c
@@ -73,8 +73,8 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr,
- __u8 prio, __u8 ttl, __be16 src_port,
- __be16 dst_port, bool nocheck)
+ __u8 prio, __u8 ttl, __be32 label,
+ __be16 src_port, __be16 dst_port, bool nocheck)
{
struct udphdr *uh;
struct ipv6hdr *ip6h;
@@ -98,7 +98,7 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
__skb_push(skb, sizeof(*ip6h));
skb_reset_network_header(skb);
ip6h = ipv6_hdr(skb);
- ip6_flow_hdr(ip6h, prio, htonl(0));
+ ip6_flow_hdr(ip6h, prio, label);
ip6h->payload_len = htons(skb->len);
ip6h->nexthdr = IPPROTO_UDP;
ip6h->hop_limit = ttl;
diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 49b3c2ede7ab..c94f9a15e2cd 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -196,7 +196,7 @@ static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb,
ttl = ip6_dst_hoplimit(ndst);
err = udp_tunnel6_xmit_skb(ndst, ub->ubsock->sk, skb,
ndst->dev, &src->ipv6,
- &dst->ipv6, 0, ttl, src->udp_port,
+ &dst->ipv6, 0, ttl, 0, src->udp_port,
dst->udp_port, false);
#endif
}