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Commit a38402bc authored by Simon Horman's avatar Simon Horman Committed by David S. Miller
Browse files

flow_dissector: dissect tunnel info 



Move dissection of tunnel info from the flower classifier to the flow
dissector where all other dissection occurs.  This should not have any
behavioural affect on other users of the flow dissector.

Signed-off-by: default avatarSimon Horman <simon.horman@netronome.com>
Reviewed-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 32f16369

net/core/flow_dissector.c

+100 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
#include <linux/ipv6.h>

#include <linux/if_vlan.h>

#include <net/dsa.h>

#include <net/dst_metadata.h>

#include <net/ip.h>

#include <net/ipv6.h>

#include <net/gre.h>
@@ -115,6 +116,102 @@ __be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto, 
}

EXPORT_SYMBOL(__skb_flow_get_ports);



static void

skb_flow_dissect_set_enc_addr_type(enum flow_dissector_key_id type,

				   struct flow_dissector *flow_dissector,

				   void *target_container)

{

	struct flow_dissector_key_control *ctrl;



	if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL))

		return;



	ctrl = skb_flow_dissector_target(flow_dissector,

					 FLOW_DISSECTOR_KEY_ENC_CONTROL,

					 target_container);

	ctrl->addr_type = type;

}



static void

__skb_flow_dissect_tunnel_info(const struct sk_buff *skb,

			       struct flow_dissector *flow_dissector,

			       void *target_container)

{

	struct ip_tunnel_info *info;

	struct ip_tunnel_key *key;



	/* A quick check to see if there might be something to do. */

	if (!dissector_uses_key(flow_dissector,

				FLOW_DISSECTOR_KEY_ENC_KEYID) &&

	    !dissector_uses_key(flow_dissector,

				FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) &&

	    !dissector_uses_key(flow_dissector,

				FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) &&

	    !dissector_uses_key(flow_dissector,

				FLOW_DISSECTOR_KEY_ENC_CONTROL) &&

	    !dissector_uses_key(flow_dissector,

				FLOW_DISSECTOR_KEY_ENC_PORTS))

		return;



	info = skb_tunnel_info(skb);

	if (!info)

		return;



	key = &info->key;



	switch (ip_tunnel_info_af(info)) {

	case AF_INET:

		skb_flow_dissect_set_enc_addr_type(FLOW_DISSECTOR_KEY_IPV4_ADDRS,

						   flow_dissector,

						   target_container);

		if (dissector_uses_key(flow_dissector,

				       FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {

			struct flow_dissector_key_ipv4_addrs *ipv4;



			ipv4 = skb_flow_dissector_target(flow_dissector,

							 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,

							 target_container);

			ipv4->src = key->u.ipv4.src;

			ipv4->dst = key->u.ipv4.dst;

		}

		break;

	case AF_INET6:

		skb_flow_dissect_set_enc_addr_type(FLOW_DISSECTOR_KEY_IPV6_ADDRS,

						   flow_dissector,

						   target_container);

		if (dissector_uses_key(flow_dissector,

				       FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {

			struct flow_dissector_key_ipv6_addrs *ipv6;



			ipv6 = skb_flow_dissector_target(flow_dissector,

							 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,

							 target_container);

			ipv6->src = key->u.ipv6.src;

			ipv6->dst = key->u.ipv6.dst;

		}

		break;

	}



	if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {

		struct flow_dissector_key_keyid *keyid;



		keyid = skb_flow_dissector_target(flow_dissector,

						  FLOW_DISSECTOR_KEY_ENC_KEYID,

						  target_container);

		keyid->keyid = tunnel_id_to_key32(key->tun_id);

	}



	if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {

		struct flow_dissector_key_ports *tp;



		tp = skb_flow_dissector_target(flow_dissector,

					       FLOW_DISSECTOR_KEY_ENC_PORTS,

					       target_container);

		tp->src = key->tp_src;

		tp->dst = key->tp_dst;

	}

}



static enum flow_dissect_ret

__skb_flow_dissect_mpls(const struct sk_buff *skb,

			struct flow_dissector *flow_dissector,
@@ -478,6 +575,9 @@ bool __skb_flow_dissect(const struct sk_buff *skb, 
					      FLOW_DISSECTOR_KEY_BASIC,

					      target_container);



	__skb_flow_dissect_tunnel_info(skb, flow_dissector,

				       target_container);



	if (dissector_uses_key(flow_dissector,

			       FLOW_DISSECTOR_KEY_ETH_ADDRS)) {

		struct ethhdr *eth = eth_hdr(skb);

net/sched/cls_flower.c

+0 −25
Original line number Diff line number Diff line
@@ -152,37 +152,12 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 
	struct cls_fl_filter *f;

	struct fl_flow_key skb_key;

	struct fl_flow_key skb_mkey;

	struct ip_tunnel_info *info;



	if (!atomic_read(&head->ht.nelems))

		return -1;



	fl_clear_masked_range(&skb_key, &head->mask);



	info = skb_tunnel_info(skb);

	if (info) {

		struct ip_tunnel_key *key = &info->key;



		switch (ip_tunnel_info_af(info)) {

		case AF_INET:

			skb_key.enc_control.addr_type =

				FLOW_DISSECTOR_KEY_IPV4_ADDRS;

			skb_key.enc_ipv4.src = key->u.ipv4.src;

			skb_key.enc_ipv4.dst = key->u.ipv4.dst;

			break;

		case AF_INET6:

			skb_key.enc_control.addr_type =

				FLOW_DISSECTOR_KEY_IPV6_ADDRS;

			skb_key.enc_ipv6.src = key->u.ipv6.src;

			skb_key.enc_ipv6.dst = key->u.ipv6.dst;

			break;

		}



		skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);

		skb_key.enc_tp.src = key->tp_src;

		skb_key.enc_tp.dst = key->tp_dst;

	}



	skb_key.indev_ifindex = skb->skb_iif;

	/* skb_flow_dissect() does not set n_proto in case an unknown protocol,

	 * so do it rather here.