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Commit a65056ec authored by Nikolay Aleksandrov's avatar Nikolay Aleksandrov Committed by David S. Miller
Browse files

net: bridge: extend MLD/IGMP query stats 

As was suggested this patch adds support for the different versions of MLD
and IGMP query types. Since the user visible structure is still in net-next
we can augment it instead of adding netlink attributes.
The distinction between the different IGMP/MLD query types is done as
suggested in Section 7.1, RFC 3376 [1] and Section 8.1, RFC 3810 [2] based
on query payload size and code for IGMP. Since all IGMP packets go through
multicast_rcv() and it uses ip_mc_check_igmp/ipv6_mc_check_mld we can be
sure that at least the ip/ipv6 header can be directly used.

[1] https://tools.ietf.org/html/rfc3376#section-7
[2] https://tools.ietf.org/html/rfc3810#section-8.1



Suggested-by: default avatarLinus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: default avatarStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f1533cce

include/uapi/linux/if_bridge.h

+5 −2
Original line number Diff line number Diff line
@@ -261,14 +261,17 @@ enum { 


/* IGMP/MLD statistics */

struct br_mcast_stats {

	__u64 igmp_queries[BR_MCAST_DIR_SIZE];

	__u64 igmp_v1queries[BR_MCAST_DIR_SIZE];

	__u64 igmp_v2queries[BR_MCAST_DIR_SIZE];

	__u64 igmp_v3queries[BR_MCAST_DIR_SIZE];

	__u64 igmp_leaves[BR_MCAST_DIR_SIZE];

	__u64 igmp_v1reports[BR_MCAST_DIR_SIZE];

	__u64 igmp_v2reports[BR_MCAST_DIR_SIZE];

	__u64 igmp_v3reports[BR_MCAST_DIR_SIZE];

	__u64 igmp_parse_errors;



	__u64 mld_queries[BR_MCAST_DIR_SIZE];

	__u64 mld_v1queries[BR_MCAST_DIR_SIZE];

	__u64 mld_v2queries[BR_MCAST_DIR_SIZE];

	__u64 mld_leaves[BR_MCAST_DIR_SIZE];

	__u64 mld_v1reports[BR_MCAST_DIR_SIZE];

	__u64 mld_v2reports[BR_MCAST_DIR_SIZE];

net/bridge/br_forward.c

+2 −5
Original line number Diff line number Diff line
@@ -199,7 +199,6 @@ static void br_flood(struct net_bridge *br, struct sk_buff *skb, 
		     bool unicast)

{

	u8 igmp_type = br_multicast_igmp_type(skb);

	__be16 proto = skb->protocol;

	struct net_bridge_port *prev;

	struct net_bridge_port *p;
@@ -221,7 +220,7 @@ static void br_flood(struct net_bridge *br, struct sk_buff *skb, 
		if (IS_ERR(prev))

			goto out;

		if (prev == p)

			br_multicast_count(p->br, p, proto, igmp_type,

			br_multicast_count(p->br, p, skb, igmp_type,

					   BR_MCAST_DIR_TX);

	}
@@ -266,8 +265,6 @@ static void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 
	struct net_bridge *br = netdev_priv(dev);

	struct net_bridge_port *prev = NULL;

	struct net_bridge_port_group *p;

	__be16 proto = skb->protocol;



	struct hlist_node *rp;



	rp = rcu_dereference(hlist_first_rcu(&br->router_list));
@@ -286,7 +283,7 @@ static void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 
		if (IS_ERR(prev))

			goto out;

		if (prev == port)

			br_multicast_count(port->br, port, proto, igmp_type,

			br_multicast_count(port->br, port, skb, igmp_type,

					   BR_MCAST_DIR_TX);



		if ((unsigned long)lport >= (unsigned long)port)

net/bridge/br_input.c

+1 −1
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ static int br_pass_frame_up(struct sk_buff *skb) 
	if (!skb)

		return NET_RX_DROP;

	/* update the multicast stats if the packet is IGMP/MLD */

	br_multicast_count(br, NULL, skb->protocol, br_multicast_igmp_type(skb),

	br_multicast_count(br, NULL, skb, br_multicast_igmp_type(skb),

			   BR_MCAST_DIR_TX);



	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN,

net/bridge/br_multicast.c

+37 −11
Original line number Diff line number Diff line
@@ -843,14 +843,14 @@ static void __br_multicast_send_query(struct net_bridge *br, 


	if (port) {

		skb->dev = port->dev;

		br_multicast_count(br, port, skb->protocol, igmp_type,

		br_multicast_count(br, port, skb, igmp_type,

				   BR_MCAST_DIR_TX);

		NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,

			dev_net(port->dev), NULL, skb, NULL, skb->dev,

			br_dev_queue_push_xmit);

	} else {

		br_multicast_select_own_querier(br, ip, skb);

		br_multicast_count(br, port, skb->protocol, igmp_type,

		br_multicast_count(br, port, skb, igmp_type,

				   BR_MCAST_DIR_RX);

		netif_rx(skb);

	}
@@ -1676,7 +1676,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br, 
	if (skb_trimmed && skb_trimmed != skb)

		kfree_skb(skb_trimmed);



	br_multicast_count(br, port, skb->protocol, BR_INPUT_SKB_CB(skb)->igmp,

	br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,

			   BR_MCAST_DIR_RX);



	return err;
@@ -1725,7 +1725,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, 
	if (skb_trimmed && skb_trimmed != skb)

		kfree_skb(skb_trimmed);



	br_multicast_count(br, port, skb->protocol, BR_INPUT_SKB_CB(skb)->igmp,

	br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,

			   BR_MCAST_DIR_RX);



	return err;
@@ -2251,13 +2251,16 @@ bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) 
EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);



static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,

			       __be16 proto, u8 type, u8 dir)

			       const struct sk_buff *skb, u8 type, u8 dir)

{

	struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);

	__be16 proto = skb->protocol;

	unsigned int t_len;



	u64_stats_update_begin(&pstats->syncp);

	switch (proto) {

	case htons(ETH_P_IP):

		t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);

		switch (type) {

		case IGMP_HOST_MEMBERSHIP_REPORT:

			pstats->mstats.igmp_v1reports[dir]++;
@@ -2269,7 +2272,21 @@ static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, 
			pstats->mstats.igmp_v3reports[dir]++;

			break;

		case IGMP_HOST_MEMBERSHIP_QUERY:

			pstats->mstats.igmp_queries[dir]++;

			if (t_len != sizeof(struct igmphdr)) {

				pstats->mstats.igmp_v3queries[dir]++;

			} else {

				unsigned int offset = skb_transport_offset(skb);

				struct igmphdr *ih, _ihdr;



				ih = skb_header_pointer(skb, offset,

							sizeof(_ihdr), &_ihdr);

				if (!ih)

					break;

				if (!ih->code)

					pstats->mstats.igmp_v1queries[dir]++;

				else

					pstats->mstats.igmp_v2queries[dir]++;

			}

			break;

		case IGMP_HOST_LEAVE_MESSAGE:

			pstats->mstats.igmp_leaves[dir]++;
@@ -2278,6 +2295,9 @@ static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, 
		break;

#if IS_ENABLED(CONFIG_IPV6)

	case htons(ETH_P_IPV6):

		t_len = ntohs(ipv6_hdr(skb)->payload_len) +

			sizeof(struct ipv6hdr);

		t_len -= skb_network_header_len(skb);

		switch (type) {

		case ICMPV6_MGM_REPORT:

			pstats->mstats.mld_v1reports[dir]++;
@@ -2286,7 +2306,10 @@ static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, 
			pstats->mstats.mld_v2reports[dir]++;

			break;

		case ICMPV6_MGM_QUERY:

			pstats->mstats.mld_queries[dir]++;

			if (t_len != sizeof(struct mld_msg))

				pstats->mstats.mld_v2queries[dir]++;

			else

				pstats->mstats.mld_v1queries[dir]++;

			break;

		case ICMPV6_MGM_REDUCTION:

			pstats->mstats.mld_leaves[dir]++;
@@ -2299,7 +2322,7 @@ static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, 
}



void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,

			__be16 proto, u8 type, u8 dir)

			const struct sk_buff *skb, u8 type, u8 dir)

{

	struct bridge_mcast_stats __percpu *stats;
@@ -2314,7 +2337,7 @@ void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 
	if (WARN_ON(!stats))

		return;



	br_mcast_stats_add(stats, proto, type, dir);

	br_mcast_stats_add(stats, skb, type, dir);

}



int br_multicast_init_stats(struct net_bridge *br)
@@ -2359,14 +2382,17 @@ void br_multicast_get_stats(const struct net_bridge *br, 
			memcpy(&temp, &cpu_stats->mstats, sizeof(temp));

		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));



		mcast_stats_add_dir(tdst.igmp_queries, temp.igmp_queries);

		mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);

		mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);

		mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);

		mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);

		mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);

		mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);

		mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);

		tdst.igmp_parse_errors += temp.igmp_parse_errors;



		mcast_stats_add_dir(tdst.mld_queries, temp.mld_queries);

		mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);

		mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);

		mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);

		mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);

		mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);

net/bridge/br_private.h

+3 −2
Original line number Diff line number Diff line
@@ -586,7 +586,7 @@ void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 
void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,

		   int type);

void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,

			__be16 proto, u8 type, u8 dir);

			const struct sk_buff *skb, u8 type, u8 dir);

int br_multicast_init_stats(struct net_bridge *br);

void br_multicast_get_stats(const struct net_bridge *br,

			    const struct net_bridge_port *p,
@@ -719,7 +719,8 @@ static inline void br_mdb_uninit(void) 


static inline void br_multicast_count(struct net_bridge *br,

				      const struct net_bridge_port *p,

				      __be16 proto, u8 type, u8 dir)

				      const struct sk_buff *skb,

				      u8 type, u8 dir)

{

}