Extend OVS IPFIX exporter to export tunnel headers

Extend IPFIX exporter to export tunnel headers when both input and output
of the port.
Add three other_config options in IPFIX table: enable-input-sampling,
enable-output-sampling and enable-tunnel-sampling, to control whether
sampling tunnel info, on which direction (input or output).
Insert sampling action before output action and the output tunnel port
is sent to datapath in the sampling action.
Make datapath collect output tunnel info and send it back to userpace
in upcall message with a new additional optional attribute.
Add a tunnel ports map to make the tunnel port lookup faster in sampling
upcalls in IPFIX exporter. Make the IPFIX exporter generate IPFIX template
sets with enterprise elements for the tunnel info, save the tunnel info
in IPFIX cache entries, and send IPFIX DATA with tunnel info.
Add flowDirection element in IPFIX templates.

Signed-off-by: Wenyu Zhang <wenyuz@vmware.com>
Acked-by: Romain Lenglet <rlenglet@vmware.com>
Acked-by: Ben Pfaff <blp@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>

1 files changed, 45 insertions, 15 deletions

diff --git a/datapath/flow.h b/datapath/flow.h
index 127127f2f..44ed10df4 100644
--- a/datapath/flow.h
+++ b/datapath/flow.h
@@ -39,8 +39,8 @@ struct sk_buff;
 
 /* Used to memset ovs_key_ipv4_tunnel padding. */
 #define OVS_TUNNEL_KEY_SIZE					\
-        (offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + 	\
-         FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl))
+	(offsetof(struct ovs_key_ipv4_tunnel, tp_dst) +		\
+	 FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, tp_dst))
 
 struct ovs_key_ipv4_tunnel {
 	__be64 tun_id;
@@ -49,6 +49,8 @@ struct ovs_key_ipv4_tunnel {
 	__be16 tun_flags;
 	u8   ipv4_tos;
 	u8   ipv4_ttl;
+	__be16 tp_src;
+	__be16 tp_dst;
 } __packed __aligned(4); /* Minimize padding. */
 
 struct ovs_tunnel_info {
@@ -66,32 +68,60 @@ struct ovs_tunnel_info {
 					FIELD_SIZEOF(struct sw_flow_key, tun_opts) - \
 					   opt_len)
 
-static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
-					 const struct iphdr *iph, __be64 tun_id,
-					 __be16 tun_flags,
-					 struct geneve_opt *opts,
-					 u8 opts_len)
+static inline void __ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
+					    __be32 saddr, __be32 daddr,
+					    u8 tos, u8 ttl,
+					    __be16 tp_src,
+					    __be16 tp_dst,
+					    __be64 tun_id,
+					    __be16 tun_flags,
+					    struct geneve_opt *opts,
+					    u8 opts_len)
 {
 	tun_info->tunnel.tun_id = tun_id;
-	tun_info->tunnel.ipv4_src = iph->saddr;
-	tun_info->tunnel.ipv4_dst = iph->daddr;
-	tun_info->tunnel.ipv4_tos = iph->tos;
-	tun_info->tunnel.ipv4_ttl = iph->ttl;
+	tun_info->tunnel.ipv4_src = saddr;
+	tun_info->tunnel.ipv4_dst = daddr;
+	tun_info->tunnel.ipv4_tos = tos;
+	tun_info->tunnel.ipv4_ttl = ttl;
 	tun_info->tunnel.tun_flags = tun_flags;
 
-	/* clear struct padding. */
-	memset((unsigned char *) &tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, 0,
-	       sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE);
+	/* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
+	 * the upper tunnel are used.
+	 * E.g: GRE over IPSEC, the tp_src and tp_port are zero.
+	 */
+	tun_info->tunnel.tp_src = tp_src;
+	tun_info->tunnel.tp_dst = tp_dst;
+
+	/* Clear struct padding. */
+	if (sizeof(tun_info->tunnel) != OVS_TUNNEL_KEY_SIZE)
+		memset((unsigned char *) &tun_info->tunnel +
+					 OVS_TUNNEL_KEY_SIZE,
+			0, sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE);
 
 	tun_info->options = opts;
 	tun_info->options_len = opts_len;
 }
 
+static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
+					  const struct iphdr *iph,
+					  __be16 tp_src,
+					  __be16 tp_dst,
+					  __be64 tun_id,
+					  __be16 tun_flags,
+					  struct geneve_opt *opts,
+					  u8 opts_len)
+{
+	__ovs_flow_tun_info_init(tun_info, iph->saddr, iph->daddr,
+				 iph->tos, iph->ttl,
+				 tp_src, tp_dst,
+				 tun_id, tun_flags,
+				 opts, opts_len);
+}
+
 #define OVS_SW_FLOW_KEY_METADATA_SIZE			\
 	(offsetof(struct sw_flow_key, recirc_id) +	\
 	FIELD_SIZEOF(struct sw_flow_key, recirc_id))
 
-
 struct sw_flow_key {
 	u8 tun_opts[255];
 	u8 tun_opts_len;