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![Vladimir Oltean](/assets/img/avatar_default.png)
The benefit is the ability to propagate errors from switchdev drivers for the SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING and SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL attributes. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
4026 lines
103 KiB
C
4026 lines
103 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Bridge multicast support.
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*
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* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
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*/
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/if_ether.h>
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#include <linux/igmp.h>
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#include <linux/in.h>
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#include <linux/jhash.h>
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#include <linux/kernel.h>
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#include <linux/log2.h>
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#include <linux/netdevice.h>
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#include <linux/netfilter_bridge.h>
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#include <linux/random.h>
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#include <linux/rculist.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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#include <linux/inetdevice.h>
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#include <linux/mroute.h>
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#include <net/ip.h>
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#include <net/switchdev.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <linux/icmpv6.h>
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#include <net/ipv6.h>
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#include <net/mld.h>
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#include <net/ip6_checksum.h>
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#include <net/addrconf.h>
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#endif
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#include "br_private.h"
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#include "br_private_mcast_eht.h"
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static const struct rhashtable_params br_mdb_rht_params = {
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.head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
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.key_offset = offsetof(struct net_bridge_mdb_entry, addr),
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.key_len = sizeof(struct br_ip),
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.automatic_shrinking = true,
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};
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static const struct rhashtable_params br_sg_port_rht_params = {
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.head_offset = offsetof(struct net_bridge_port_group, rhnode),
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.key_offset = offsetof(struct net_bridge_port_group, key),
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.key_len = sizeof(struct net_bridge_port_group_sg_key),
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.automatic_shrinking = true,
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};
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static void br_multicast_start_querier(struct net_bridge *br,
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struct bridge_mcast_own_query *query);
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static void br_multicast_add_router(struct net_bridge *br,
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struct net_bridge_port *port);
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static void br_ip4_multicast_leave_group(struct net_bridge *br,
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struct net_bridge_port *port,
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__be32 group,
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__u16 vid,
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const unsigned char *src);
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static void br_multicast_port_group_rexmit(struct timer_list *t);
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static void __del_port_router(struct net_bridge_port *p);
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#if IS_ENABLED(CONFIG_IPV6)
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static void br_ip6_multicast_leave_group(struct net_bridge *br,
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struct net_bridge_port *port,
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const struct in6_addr *group,
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__u16 vid, const unsigned char *src);
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#endif
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static struct net_bridge_port_group *
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__br_multicast_add_group(struct net_bridge *br,
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struct net_bridge_port *port,
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struct br_ip *group,
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const unsigned char *src,
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u8 filter_mode,
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bool igmpv2_mldv1,
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bool blocked);
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static void br_multicast_find_del_pg(struct net_bridge *br,
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struct net_bridge_port_group *pg);
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static struct net_bridge_port_group *
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br_sg_port_find(struct net_bridge *br,
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struct net_bridge_port_group_sg_key *sg_p)
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{
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lockdep_assert_held_once(&br->multicast_lock);
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return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
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br_sg_port_rht_params);
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}
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static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
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struct br_ip *dst)
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{
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return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
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}
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struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
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struct br_ip *dst)
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{
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struct net_bridge_mdb_entry *ent;
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lockdep_assert_held_once(&br->multicast_lock);
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rcu_read_lock();
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ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
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rcu_read_unlock();
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return ent;
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}
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static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
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__be32 dst, __u16 vid)
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{
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struct br_ip br_dst;
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memset(&br_dst, 0, sizeof(br_dst));
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br_dst.dst.ip4 = dst;
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br_dst.proto = htons(ETH_P_IP);
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br_dst.vid = vid;
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return br_mdb_ip_get(br, &br_dst);
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
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const struct in6_addr *dst,
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__u16 vid)
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{
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struct br_ip br_dst;
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memset(&br_dst, 0, sizeof(br_dst));
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br_dst.dst.ip6 = *dst;
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br_dst.proto = htons(ETH_P_IPV6);
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br_dst.vid = vid;
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return br_mdb_ip_get(br, &br_dst);
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}
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#endif
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struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
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struct sk_buff *skb, u16 vid)
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{
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struct br_ip ip;
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if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
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return NULL;
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if (BR_INPUT_SKB_CB(skb)->igmp)
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return NULL;
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memset(&ip, 0, sizeof(ip));
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ip.proto = skb->protocol;
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ip.vid = vid;
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switch (skb->protocol) {
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case htons(ETH_P_IP):
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ip.dst.ip4 = ip_hdr(skb)->daddr;
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if (br->multicast_igmp_version == 3) {
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struct net_bridge_mdb_entry *mdb;
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ip.src.ip4 = ip_hdr(skb)->saddr;
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mdb = br_mdb_ip_get_rcu(br, &ip);
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if (mdb)
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return mdb;
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ip.src.ip4 = 0;
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}
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case htons(ETH_P_IPV6):
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ip.dst.ip6 = ipv6_hdr(skb)->daddr;
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if (br->multicast_mld_version == 2) {
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struct net_bridge_mdb_entry *mdb;
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ip.src.ip6 = ipv6_hdr(skb)->saddr;
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mdb = br_mdb_ip_get_rcu(br, &ip);
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if (mdb)
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return mdb;
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memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
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}
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break;
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#endif
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default:
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ip.proto = 0;
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ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
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}
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return br_mdb_ip_get_rcu(br, &ip);
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}
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static bool br_port_group_equal(struct net_bridge_port_group *p,
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struct net_bridge_port *port,
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const unsigned char *src)
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{
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if (p->key.port != port)
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return false;
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if (!(port->flags & BR_MULTICAST_TO_UNICAST))
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return true;
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return ether_addr_equal(src, p->eth_addr);
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}
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static void __fwd_add_star_excl(struct net_bridge_port_group *pg,
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struct br_ip *sg_ip)
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{
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struct net_bridge_port_group_sg_key sg_key;
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struct net_bridge *br = pg->key.port->br;
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struct net_bridge_port_group *src_pg;
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memset(&sg_key, 0, sizeof(sg_key));
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sg_key.port = pg->key.port;
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sg_key.addr = *sg_ip;
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if (br_sg_port_find(br, &sg_key))
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return;
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src_pg = __br_multicast_add_group(br, pg->key.port, sg_ip, pg->eth_addr,
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MCAST_INCLUDE, false, false);
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if (IS_ERR_OR_NULL(src_pg) ||
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src_pg->rt_protocol != RTPROT_KERNEL)
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return;
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src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
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}
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static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
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struct br_ip *sg_ip)
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{
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struct net_bridge_port_group_sg_key sg_key;
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struct net_bridge *br = pg->key.port->br;
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struct net_bridge_port_group *src_pg;
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memset(&sg_key, 0, sizeof(sg_key));
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sg_key.port = pg->key.port;
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sg_key.addr = *sg_ip;
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src_pg = br_sg_port_find(br, &sg_key);
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if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
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src_pg->rt_protocol != RTPROT_KERNEL)
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return;
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br_multicast_find_del_pg(br, src_pg);
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}
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/* When a port group transitions to (or is added as) EXCLUDE we need to add it
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* to all other ports' S,G entries which are not blocked by the current group
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* for proper replication, the assumption is that any S,G blocked entries
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* are already added so the S,G,port lookup should skip them.
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* When a port group transitions from EXCLUDE -> INCLUDE mode or is being
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* deleted we need to remove it from all ports' S,G entries where it was
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* automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
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*/
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void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
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u8 filter_mode)
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{
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struct net_bridge *br = pg->key.port->br;
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struct net_bridge_port_group *pg_lst;
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struct net_bridge_mdb_entry *mp;
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struct br_ip sg_ip;
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if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
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return;
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mp = br_mdb_ip_get(br, &pg->key.addr);
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if (!mp)
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return;
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memset(&sg_ip, 0, sizeof(sg_ip));
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sg_ip = pg->key.addr;
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for (pg_lst = mlock_dereference(mp->ports, br);
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pg_lst;
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pg_lst = mlock_dereference(pg_lst->next, br)) {
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struct net_bridge_group_src *src_ent;
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if (pg_lst == pg)
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continue;
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hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
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if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
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continue;
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sg_ip.src = src_ent->addr.src;
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switch (filter_mode) {
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case MCAST_INCLUDE:
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__fwd_del_star_excl(pg, &sg_ip);
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break;
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case MCAST_EXCLUDE:
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__fwd_add_star_excl(pg, &sg_ip);
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break;
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}
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}
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}
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}
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/* called when adding a new S,G with host_joined == false by default */
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static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
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struct net_bridge_port_group *sg)
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{
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struct net_bridge_mdb_entry *sg_mp;
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if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
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return;
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if (!star_mp->host_joined)
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return;
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sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
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if (!sg_mp)
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return;
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sg_mp->host_joined = true;
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}
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/* set the host_joined state of all of *,G's S,G entries */
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static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
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{
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struct net_bridge *br = star_mp->br;
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struct net_bridge_mdb_entry *sg_mp;
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struct net_bridge_port_group *pg;
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struct br_ip sg_ip;
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if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
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return;
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memset(&sg_ip, 0, sizeof(sg_ip));
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sg_ip = star_mp->addr;
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for (pg = mlock_dereference(star_mp->ports, br);
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pg;
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pg = mlock_dereference(pg->next, br)) {
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struct net_bridge_group_src *src_ent;
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hlist_for_each_entry(src_ent, &pg->src_list, node) {
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if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
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continue;
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sg_ip.src = src_ent->addr.src;
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sg_mp = br_mdb_ip_get(br, &sg_ip);
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if (!sg_mp)
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continue;
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sg_mp->host_joined = star_mp->host_joined;
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}
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}
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}
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static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
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{
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struct net_bridge_port_group __rcu **pp;
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struct net_bridge_port_group *p;
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/* *,G exclude ports are only added to S,G entries */
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if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
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return;
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/* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
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* we should ignore perm entries since they're managed by user-space
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*/
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for (pp = &sgmp->ports;
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(p = mlock_dereference(*pp, sgmp->br)) != NULL;
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pp = &p->next)
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if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
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MDB_PG_FLAGS_PERMANENT)))
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return;
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/* currently the host can only have joined the *,G which means
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* we treat it as EXCLUDE {}, so for an S,G it's considered a
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* STAR_EXCLUDE entry and we can safely leave it
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*/
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sgmp->host_joined = false;
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for (pp = &sgmp->ports;
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(p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
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if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
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br_multicast_del_pg(sgmp, p, pp);
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else
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pp = &p->next;
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}
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}
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void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
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struct net_bridge_port_group *sg)
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{
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struct net_bridge_port_group_sg_key sg_key;
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struct net_bridge *br = star_mp->br;
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struct net_bridge_port_group *pg;
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if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
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return;
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if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
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return;
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br_multicast_sg_host_state(star_mp, sg);
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memset(&sg_key, 0, sizeof(sg_key));
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sg_key.addr = sg->key.addr;
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/* we need to add all exclude ports to the S,G */
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for (pg = mlock_dereference(star_mp->ports, br);
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pg;
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pg = mlock_dereference(pg->next, br)) {
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struct net_bridge_port_group *src_pg;
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if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
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continue;
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sg_key.port = pg->key.port;
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if (br_sg_port_find(br, &sg_key))
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continue;
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src_pg = __br_multicast_add_group(br, pg->key.port,
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&sg->key.addr,
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sg->eth_addr,
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MCAST_INCLUDE, false, false);
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if (IS_ERR_OR_NULL(src_pg) ||
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src_pg->rt_protocol != RTPROT_KERNEL)
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continue;
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src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
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}
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}
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static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
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{
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struct net_bridge_mdb_entry *star_mp;
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struct net_bridge_port_group *sg;
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struct br_ip sg_ip;
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if (src->flags & BR_SGRP_F_INSTALLED)
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return;
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memset(&sg_ip, 0, sizeof(sg_ip));
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sg_ip = src->pg->key.addr;
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sg_ip.src = src->addr.src;
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sg = __br_multicast_add_group(src->br, src->pg->key.port, &sg_ip,
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src->pg->eth_addr, MCAST_INCLUDE, false,
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!timer_pending(&src->timer));
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if (IS_ERR_OR_NULL(sg))
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return;
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src->flags |= BR_SGRP_F_INSTALLED;
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sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
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/* if it was added by user-space as perm we can skip next steps */
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if (sg->rt_protocol != RTPROT_KERNEL &&
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(sg->flags & MDB_PG_FLAGS_PERMANENT))
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return;
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/* the kernel is now responsible for removing this S,G */
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del_timer(&sg->timer);
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star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
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if (!star_mp)
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return;
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br_multicast_sg_add_exclude_ports(star_mp, sg);
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}
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static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
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bool fastleave)
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{
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struct net_bridge_port_group *p, *pg = src->pg;
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struct net_bridge_port_group __rcu **pp;
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struct net_bridge_mdb_entry *mp;
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struct br_ip sg_ip;
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memset(&sg_ip, 0, sizeof(sg_ip));
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sg_ip = pg->key.addr;
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sg_ip.src = src->addr.src;
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mp = br_mdb_ip_get(src->br, &sg_ip);
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if (!mp)
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return;
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for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, src->br)) != NULL;
|
|
pp = &p->next) {
|
|
if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
|
|
continue;
|
|
|
|
if (p->rt_protocol != RTPROT_KERNEL &&
|
|
(p->flags & MDB_PG_FLAGS_PERMANENT))
|
|
break;
|
|
|
|
if (fastleave)
|
|
p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
|
|
br_multicast_del_pg(mp, p, pp);
|
|
break;
|
|
}
|
|
src->flags &= ~BR_SGRP_F_INSTALLED;
|
|
}
|
|
|
|
/* install S,G and based on src's timer enable or disable forwarding */
|
|
static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
|
|
{
|
|
struct net_bridge_port_group_sg_key sg_key;
|
|
struct net_bridge_port_group *sg;
|
|
u8 old_flags;
|
|
|
|
br_multicast_fwd_src_add(src);
|
|
|
|
memset(&sg_key, 0, sizeof(sg_key));
|
|
sg_key.addr = src->pg->key.addr;
|
|
sg_key.addr.src = src->addr.src;
|
|
sg_key.port = src->pg->key.port;
|
|
|
|
sg = br_sg_port_find(src->br, &sg_key);
|
|
if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
|
|
return;
|
|
|
|
old_flags = sg->flags;
|
|
if (timer_pending(&src->timer))
|
|
sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
|
|
else
|
|
sg->flags |= MDB_PG_FLAGS_BLOCKED;
|
|
|
|
if (old_flags != sg->flags) {
|
|
struct net_bridge_mdb_entry *sg_mp;
|
|
|
|
sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
|
|
if (!sg_mp)
|
|
return;
|
|
br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
|
|
}
|
|
}
|
|
|
|
static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
|
|
{
|
|
struct net_bridge_mdb_entry *mp;
|
|
|
|
mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
|
|
WARN_ON(!hlist_unhashed(&mp->mdb_node));
|
|
WARN_ON(mp->ports);
|
|
|
|
del_timer_sync(&mp->timer);
|
|
kfree_rcu(mp, rcu);
|
|
}
|
|
|
|
static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
|
|
{
|
|
struct net_bridge *br = mp->br;
|
|
|
|
rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
|
|
br_mdb_rht_params);
|
|
hlist_del_init_rcu(&mp->mdb_node);
|
|
hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
|
|
queue_work(system_long_wq, &br->mcast_gc_work);
|
|
}
|
|
|
|
static void br_multicast_group_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
|
|
struct net_bridge *br = mp->br;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
|
|
timer_pending(&mp->timer))
|
|
goto out;
|
|
|
|
br_multicast_host_leave(mp, true);
|
|
|
|
if (mp->ports)
|
|
goto out;
|
|
br_multicast_del_mdb_entry(mp);
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
|
|
{
|
|
struct net_bridge_group_src *src;
|
|
|
|
src = container_of(gc, struct net_bridge_group_src, mcast_gc);
|
|
WARN_ON(!hlist_unhashed(&src->node));
|
|
|
|
del_timer_sync(&src->timer);
|
|
kfree_rcu(src, rcu);
|
|
}
|
|
|
|
void br_multicast_del_group_src(struct net_bridge_group_src *src,
|
|
bool fastleave)
|
|
{
|
|
struct net_bridge *br = src->pg->key.port->br;
|
|
|
|
br_multicast_fwd_src_remove(src, fastleave);
|
|
hlist_del_init_rcu(&src->node);
|
|
src->pg->src_ents--;
|
|
hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
|
|
queue_work(system_long_wq, &br->mcast_gc_work);
|
|
}
|
|
|
|
static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
|
|
{
|
|
struct net_bridge_port_group *pg;
|
|
|
|
pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
|
|
WARN_ON(!hlist_unhashed(&pg->mglist));
|
|
WARN_ON(!hlist_empty(&pg->src_list));
|
|
|
|
del_timer_sync(&pg->rexmit_timer);
|
|
del_timer_sync(&pg->timer);
|
|
kfree_rcu(pg, rcu);
|
|
}
|
|
|
|
void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_port_group *pg,
|
|
struct net_bridge_port_group __rcu **pp)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
struct net_bridge_group_src *ent;
|
|
struct hlist_node *tmp;
|
|
|
|
rcu_assign_pointer(*pp, pg->next);
|
|
hlist_del_init(&pg->mglist);
|
|
br_multicast_eht_clean_sets(pg);
|
|
hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
|
|
br_multicast_del_group_src(ent, false);
|
|
br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
|
|
if (!br_multicast_is_star_g(&mp->addr)) {
|
|
rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
|
|
br_sg_port_rht_params);
|
|
br_multicast_sg_del_exclude_ports(mp);
|
|
} else {
|
|
br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
|
|
}
|
|
hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
|
|
queue_work(system_long_wq, &br->mcast_gc_work);
|
|
|
|
if (!mp->ports && !mp->host_joined && netif_running(br->dev))
|
|
mod_timer(&mp->timer, jiffies);
|
|
}
|
|
|
|
static void br_multicast_find_del_pg(struct net_bridge *br,
|
|
struct net_bridge_port_group *pg)
|
|
{
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct net_bridge_port_group *p;
|
|
|
|
mp = br_mdb_ip_get(br, &pg->key.addr);
|
|
if (WARN_ON(!mp))
|
|
return;
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (p != pg)
|
|
continue;
|
|
|
|
br_multicast_del_pg(mp, pg, pp);
|
|
return;
|
|
}
|
|
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static void br_multicast_port_group_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge_port_group *pg = from_timer(pg, t, timer);
|
|
struct net_bridge_group_src *src_ent;
|
|
struct net_bridge *br = pg->key.port->br;
|
|
struct hlist_node *tmp;
|
|
bool changed;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
|
|
hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
|
|
goto out;
|
|
|
|
changed = !!(pg->filter_mode == MCAST_EXCLUDE);
|
|
pg->filter_mode = MCAST_INCLUDE;
|
|
hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
|
|
if (!timer_pending(&src_ent->timer)) {
|
|
br_multicast_del_group_src(src_ent, false);
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if (hlist_empty(&pg->src_list)) {
|
|
br_multicast_find_del_pg(br, pg);
|
|
} else if (changed) {
|
|
struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
|
|
|
|
if (changed && br_multicast_is_star_g(&pg->key.addr))
|
|
br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
|
|
|
|
if (WARN_ON(!mp))
|
|
goto out;
|
|
br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
|
|
}
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_multicast_gc(struct hlist_head *head)
|
|
{
|
|
struct net_bridge_mcast_gc *gcent;
|
|
struct hlist_node *tmp;
|
|
|
|
hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
|
|
hlist_del_init(&gcent->gc_node);
|
|
gcent->destroy(gcent);
|
|
}
|
|
}
|
|
|
|
static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
|
|
struct net_bridge_port_group *pg,
|
|
__be32 ip_dst, __be32 group,
|
|
bool with_srcs, bool over_lmqt,
|
|
u8 sflag, u8 *igmp_type,
|
|
bool *need_rexmit)
|
|
{
|
|
struct net_bridge_port *p = pg ? pg->key.port : NULL;
|
|
struct net_bridge_group_src *ent;
|
|
size_t pkt_size, igmp_hdr_size;
|
|
unsigned long now = jiffies;
|
|
struct igmpv3_query *ihv3;
|
|
void *csum_start = NULL;
|
|
__sum16 *csum = NULL;
|
|
struct sk_buff *skb;
|
|
struct igmphdr *ih;
|
|
struct ethhdr *eth;
|
|
unsigned long lmqt;
|
|
struct iphdr *iph;
|
|
u16 lmqt_srcs = 0;
|
|
|
|
igmp_hdr_size = sizeof(*ih);
|
|
if (br->multicast_igmp_version == 3) {
|
|
igmp_hdr_size = sizeof(*ihv3);
|
|
if (pg && with_srcs) {
|
|
lmqt = now + (br->multicast_last_member_interval *
|
|
br->multicast_last_member_count);
|
|
hlist_for_each_entry(ent, &pg->src_list, node) {
|
|
if (over_lmqt == time_after(ent->timer.expires,
|
|
lmqt) &&
|
|
ent->src_query_rexmit_cnt > 0)
|
|
lmqt_srcs++;
|
|
}
|
|
|
|
if (!lmqt_srcs)
|
|
return NULL;
|
|
igmp_hdr_size += lmqt_srcs * sizeof(__be32);
|
|
}
|
|
}
|
|
|
|
pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
|
|
if ((p && pkt_size > p->dev->mtu) ||
|
|
pkt_size > br->dev->mtu)
|
|
return NULL;
|
|
|
|
skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
|
|
if (!skb)
|
|
goto out;
|
|
|
|
skb->protocol = htons(ETH_P_IP);
|
|
|
|
skb_reset_mac_header(skb);
|
|
eth = eth_hdr(skb);
|
|
|
|
ether_addr_copy(eth->h_source, br->dev->dev_addr);
|
|
ip_eth_mc_map(ip_dst, eth->h_dest);
|
|
eth->h_proto = htons(ETH_P_IP);
|
|
skb_put(skb, sizeof(*eth));
|
|
|
|
skb_set_network_header(skb, skb->len);
|
|
iph = ip_hdr(skb);
|
|
iph->tot_len = htons(pkt_size - sizeof(*eth));
|
|
|
|
iph->version = 4;
|
|
iph->ihl = 6;
|
|
iph->tos = 0xc0;
|
|
iph->id = 0;
|
|
iph->frag_off = htons(IP_DF);
|
|
iph->ttl = 1;
|
|
iph->protocol = IPPROTO_IGMP;
|
|
iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
|
|
inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
|
|
iph->daddr = ip_dst;
|
|
((u8 *)&iph[1])[0] = IPOPT_RA;
|
|
((u8 *)&iph[1])[1] = 4;
|
|
((u8 *)&iph[1])[2] = 0;
|
|
((u8 *)&iph[1])[3] = 0;
|
|
ip_send_check(iph);
|
|
skb_put(skb, 24);
|
|
|
|
skb_set_transport_header(skb, skb->len);
|
|
*igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
|
|
|
|
switch (br->multicast_igmp_version) {
|
|
case 2:
|
|
ih = igmp_hdr(skb);
|
|
ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
|
|
ih->code = (group ? br->multicast_last_member_interval :
|
|
br->multicast_query_response_interval) /
|
|
(HZ / IGMP_TIMER_SCALE);
|
|
ih->group = group;
|
|
ih->csum = 0;
|
|
csum = &ih->csum;
|
|
csum_start = (void *)ih;
|
|
break;
|
|
case 3:
|
|
ihv3 = igmpv3_query_hdr(skb);
|
|
ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
|
|
ihv3->code = (group ? br->multicast_last_member_interval :
|
|
br->multicast_query_response_interval) /
|
|
(HZ / IGMP_TIMER_SCALE);
|
|
ihv3->group = group;
|
|
ihv3->qqic = br->multicast_query_interval / HZ;
|
|
ihv3->nsrcs = htons(lmqt_srcs);
|
|
ihv3->resv = 0;
|
|
ihv3->suppress = sflag;
|
|
ihv3->qrv = 2;
|
|
ihv3->csum = 0;
|
|
csum = &ihv3->csum;
|
|
csum_start = (void *)ihv3;
|
|
if (!pg || !with_srcs)
|
|
break;
|
|
|
|
lmqt_srcs = 0;
|
|
hlist_for_each_entry(ent, &pg->src_list, node) {
|
|
if (over_lmqt == time_after(ent->timer.expires,
|
|
lmqt) &&
|
|
ent->src_query_rexmit_cnt > 0) {
|
|
ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
|
|
ent->src_query_rexmit_cnt--;
|
|
if (need_rexmit && ent->src_query_rexmit_cnt)
|
|
*need_rexmit = true;
|
|
}
|
|
}
|
|
if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
|
|
kfree_skb(skb);
|
|
return NULL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (WARN_ON(!csum || !csum_start)) {
|
|
kfree_skb(skb);
|
|
return NULL;
|
|
}
|
|
|
|
*csum = ip_compute_csum(csum_start, igmp_hdr_size);
|
|
skb_put(skb, igmp_hdr_size);
|
|
__skb_pull(skb, sizeof(*eth));
|
|
|
|
out:
|
|
return skb;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
|
|
struct net_bridge_port_group *pg,
|
|
const struct in6_addr *ip6_dst,
|
|
const struct in6_addr *group,
|
|
bool with_srcs, bool over_llqt,
|
|
u8 sflag, u8 *igmp_type,
|
|
bool *need_rexmit)
|
|
{
|
|
struct net_bridge_port *p = pg ? pg->key.port : NULL;
|
|
struct net_bridge_group_src *ent;
|
|
size_t pkt_size, mld_hdr_size;
|
|
unsigned long now = jiffies;
|
|
struct mld2_query *mld2q;
|
|
void *csum_start = NULL;
|
|
unsigned long interval;
|
|
__sum16 *csum = NULL;
|
|
struct ipv6hdr *ip6h;
|
|
struct mld_msg *mldq;
|
|
struct sk_buff *skb;
|
|
unsigned long llqt;
|
|
struct ethhdr *eth;
|
|
u16 llqt_srcs = 0;
|
|
u8 *hopopt;
|
|
|
|
mld_hdr_size = sizeof(*mldq);
|
|
if (br->multicast_mld_version == 2) {
|
|
mld_hdr_size = sizeof(*mld2q);
|
|
if (pg && with_srcs) {
|
|
llqt = now + (br->multicast_last_member_interval *
|
|
br->multicast_last_member_count);
|
|
hlist_for_each_entry(ent, &pg->src_list, node) {
|
|
if (over_llqt == time_after(ent->timer.expires,
|
|
llqt) &&
|
|
ent->src_query_rexmit_cnt > 0)
|
|
llqt_srcs++;
|
|
}
|
|
|
|
if (!llqt_srcs)
|
|
return NULL;
|
|
mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
|
|
}
|
|
}
|
|
|
|
pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
|
|
if ((p && pkt_size > p->dev->mtu) ||
|
|
pkt_size > br->dev->mtu)
|
|
return NULL;
|
|
|
|
skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
|
|
if (!skb)
|
|
goto out;
|
|
|
|
skb->protocol = htons(ETH_P_IPV6);
|
|
|
|
/* Ethernet header */
|
|
skb_reset_mac_header(skb);
|
|
eth = eth_hdr(skb);
|
|
|
|
ether_addr_copy(eth->h_source, br->dev->dev_addr);
|
|
eth->h_proto = htons(ETH_P_IPV6);
|
|
skb_put(skb, sizeof(*eth));
|
|
|
|
/* IPv6 header + HbH option */
|
|
skb_set_network_header(skb, skb->len);
|
|
ip6h = ipv6_hdr(skb);
|
|
|
|
*(__force __be32 *)ip6h = htonl(0x60000000);
|
|
ip6h->payload_len = htons(8 + mld_hdr_size);
|
|
ip6h->nexthdr = IPPROTO_HOPOPTS;
|
|
ip6h->hop_limit = 1;
|
|
ip6h->daddr = *ip6_dst;
|
|
if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
|
|
&ip6h->saddr)) {
|
|
kfree_skb(skb);
|
|
br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
|
|
return NULL;
|
|
}
|
|
|
|
br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
|
|
ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
|
|
|
|
hopopt = (u8 *)(ip6h + 1);
|
|
hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
|
|
hopopt[1] = 0; /* length of HbH */
|
|
hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
|
|
hopopt[3] = 2; /* Length of RA Option */
|
|
hopopt[4] = 0; /* Type = 0x0000 (MLD) */
|
|
hopopt[5] = 0;
|
|
hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
|
|
hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
|
|
|
|
skb_put(skb, sizeof(*ip6h) + 8);
|
|
|
|
/* ICMPv6 */
|
|
skb_set_transport_header(skb, skb->len);
|
|
interval = ipv6_addr_any(group) ?
|
|
br->multicast_query_response_interval :
|
|
br->multicast_last_member_interval;
|
|
*igmp_type = ICMPV6_MGM_QUERY;
|
|
switch (br->multicast_mld_version) {
|
|
case 1:
|
|
mldq = (struct mld_msg *)icmp6_hdr(skb);
|
|
mldq->mld_type = ICMPV6_MGM_QUERY;
|
|
mldq->mld_code = 0;
|
|
mldq->mld_cksum = 0;
|
|
mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
|
|
mldq->mld_reserved = 0;
|
|
mldq->mld_mca = *group;
|
|
csum = &mldq->mld_cksum;
|
|
csum_start = (void *)mldq;
|
|
break;
|
|
case 2:
|
|
mld2q = (struct mld2_query *)icmp6_hdr(skb);
|
|
mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
|
|
mld2q->mld2q_type = ICMPV6_MGM_QUERY;
|
|
mld2q->mld2q_code = 0;
|
|
mld2q->mld2q_cksum = 0;
|
|
mld2q->mld2q_resv1 = 0;
|
|
mld2q->mld2q_resv2 = 0;
|
|
mld2q->mld2q_suppress = sflag;
|
|
mld2q->mld2q_qrv = 2;
|
|
mld2q->mld2q_nsrcs = htons(llqt_srcs);
|
|
mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
|
|
mld2q->mld2q_mca = *group;
|
|
csum = &mld2q->mld2q_cksum;
|
|
csum_start = (void *)mld2q;
|
|
if (!pg || !with_srcs)
|
|
break;
|
|
|
|
llqt_srcs = 0;
|
|
hlist_for_each_entry(ent, &pg->src_list, node) {
|
|
if (over_llqt == time_after(ent->timer.expires,
|
|
llqt) &&
|
|
ent->src_query_rexmit_cnt > 0) {
|
|
mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
|
|
ent->src_query_rexmit_cnt--;
|
|
if (need_rexmit && ent->src_query_rexmit_cnt)
|
|
*need_rexmit = true;
|
|
}
|
|
}
|
|
if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
|
|
kfree_skb(skb);
|
|
return NULL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (WARN_ON(!csum || !csum_start)) {
|
|
kfree_skb(skb);
|
|
return NULL;
|
|
}
|
|
|
|
*csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
|
|
IPPROTO_ICMPV6,
|
|
csum_partial(csum_start, mld_hdr_size, 0));
|
|
skb_put(skb, mld_hdr_size);
|
|
__skb_pull(skb, sizeof(*eth));
|
|
|
|
out:
|
|
return skb;
|
|
}
|
|
#endif
|
|
|
|
static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
|
|
struct net_bridge_port_group *pg,
|
|
struct br_ip *ip_dst,
|
|
struct br_ip *group,
|
|
bool with_srcs, bool over_lmqt,
|
|
u8 sflag, u8 *igmp_type,
|
|
bool *need_rexmit)
|
|
{
|
|
__be32 ip4_dst;
|
|
|
|
switch (group->proto) {
|
|
case htons(ETH_P_IP):
|
|
ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
|
|
return br_ip4_multicast_alloc_query(br, pg,
|
|
ip4_dst, group->dst.ip4,
|
|
with_srcs, over_lmqt,
|
|
sflag, igmp_type,
|
|
need_rexmit);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6): {
|
|
struct in6_addr ip6_dst;
|
|
|
|
if (ip_dst)
|
|
ip6_dst = ip_dst->dst.ip6;
|
|
else
|
|
ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
|
|
htonl(1));
|
|
|
|
return br_ip6_multicast_alloc_query(br, pg,
|
|
&ip6_dst, &group->dst.ip6,
|
|
with_srcs, over_lmqt,
|
|
sflag, igmp_type,
|
|
need_rexmit);
|
|
}
|
|
#endif
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
|
|
struct br_ip *group)
|
|
{
|
|
struct net_bridge_mdb_entry *mp;
|
|
int err;
|
|
|
|
mp = br_mdb_ip_get(br, group);
|
|
if (mp)
|
|
return mp;
|
|
|
|
if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
|
|
br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
|
|
return ERR_PTR(-E2BIG);
|
|
}
|
|
|
|
mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
|
|
if (unlikely(!mp))
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
mp->br = br;
|
|
mp->addr = *group;
|
|
mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
|
|
timer_setup(&mp->timer, br_multicast_group_expired, 0);
|
|
err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
|
|
br_mdb_rht_params);
|
|
if (err) {
|
|
kfree(mp);
|
|
mp = ERR_PTR(err);
|
|
} else {
|
|
hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
|
|
}
|
|
|
|
return mp;
|
|
}
|
|
|
|
static void br_multicast_group_src_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge_group_src *src = from_timer(src, t, timer);
|
|
struct net_bridge_port_group *pg;
|
|
struct net_bridge *br = src->br;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
|
|
timer_pending(&src->timer))
|
|
goto out;
|
|
|
|
pg = src->pg;
|
|
if (pg->filter_mode == MCAST_INCLUDE) {
|
|
br_multicast_del_group_src(src, false);
|
|
if (!hlist_empty(&pg->src_list))
|
|
goto out;
|
|
br_multicast_find_del_pg(br, pg);
|
|
} else {
|
|
br_multicast_fwd_src_handle(src);
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
struct net_bridge_group_src *
|
|
br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
|
|
switch (ip->proto) {
|
|
case htons(ETH_P_IP):
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
if (ip->src.ip4 == ent->addr.src.ip4)
|
|
return ent;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6):
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
|
|
return ent;
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct net_bridge_group_src *
|
|
br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
|
|
{
|
|
struct net_bridge_group_src *grp_src;
|
|
|
|
if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
|
|
return NULL;
|
|
|
|
switch (src_ip->proto) {
|
|
case htons(ETH_P_IP):
|
|
if (ipv4_is_zeronet(src_ip->src.ip4) ||
|
|
ipv4_is_multicast(src_ip->src.ip4))
|
|
return NULL;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6):
|
|
if (ipv6_addr_any(&src_ip->src.ip6) ||
|
|
ipv6_addr_is_multicast(&src_ip->src.ip6))
|
|
return NULL;
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
|
|
if (unlikely(!grp_src))
|
|
return NULL;
|
|
|
|
grp_src->pg = pg;
|
|
grp_src->br = pg->key.port->br;
|
|
grp_src->addr = *src_ip;
|
|
grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
|
|
timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
|
|
|
|
hlist_add_head_rcu(&grp_src->node, &pg->src_list);
|
|
pg->src_ents++;
|
|
|
|
return grp_src;
|
|
}
|
|
|
|
struct net_bridge_port_group *br_multicast_new_port_group(
|
|
struct net_bridge_port *port,
|
|
struct br_ip *group,
|
|
struct net_bridge_port_group __rcu *next,
|
|
unsigned char flags,
|
|
const unsigned char *src,
|
|
u8 filter_mode,
|
|
u8 rt_protocol)
|
|
{
|
|
struct net_bridge_port_group *p;
|
|
|
|
p = kzalloc(sizeof(*p), GFP_ATOMIC);
|
|
if (unlikely(!p))
|
|
return NULL;
|
|
|
|
p->key.addr = *group;
|
|
p->key.port = port;
|
|
p->flags = flags;
|
|
p->filter_mode = filter_mode;
|
|
p->rt_protocol = rt_protocol;
|
|
p->eht_host_tree = RB_ROOT;
|
|
p->eht_set_tree = RB_ROOT;
|
|
p->mcast_gc.destroy = br_multicast_destroy_port_group;
|
|
INIT_HLIST_HEAD(&p->src_list);
|
|
|
|
if (!br_multicast_is_star_g(group) &&
|
|
rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
|
|
br_sg_port_rht_params)) {
|
|
kfree(p);
|
|
return NULL;
|
|
}
|
|
|
|
rcu_assign_pointer(p->next, next);
|
|
timer_setup(&p->timer, br_multicast_port_group_expired, 0);
|
|
timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
|
|
hlist_add_head(&p->mglist, &port->mglist);
|
|
|
|
if (src)
|
|
memcpy(p->eth_addr, src, ETH_ALEN);
|
|
else
|
|
eth_broadcast_addr(p->eth_addr);
|
|
|
|
return p;
|
|
}
|
|
|
|
void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify)
|
|
{
|
|
if (!mp->host_joined) {
|
|
mp->host_joined = true;
|
|
if (br_multicast_is_star_g(&mp->addr))
|
|
br_multicast_star_g_host_state(mp);
|
|
if (notify)
|
|
br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
|
|
}
|
|
|
|
if (br_group_is_l2(&mp->addr))
|
|
return;
|
|
|
|
mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval);
|
|
}
|
|
|
|
void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
|
|
{
|
|
if (!mp->host_joined)
|
|
return;
|
|
|
|
mp->host_joined = false;
|
|
if (br_multicast_is_star_g(&mp->addr))
|
|
br_multicast_star_g_host_state(mp);
|
|
if (notify)
|
|
br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
|
|
}
|
|
|
|
static struct net_bridge_port_group *
|
|
__br_multicast_add_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct br_ip *group,
|
|
const unsigned char *src,
|
|
u8 filter_mode,
|
|
bool igmpv2_mldv1,
|
|
bool blocked)
|
|
{
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct net_bridge_port_group *p = NULL;
|
|
struct net_bridge_mdb_entry *mp;
|
|
unsigned long now = jiffies;
|
|
|
|
if (!netif_running(br->dev) ||
|
|
(port && port->state == BR_STATE_DISABLED))
|
|
goto out;
|
|
|
|
mp = br_multicast_new_group(br, group);
|
|
if (IS_ERR(mp))
|
|
return ERR_CAST(mp);
|
|
|
|
if (!port) {
|
|
br_multicast_host_join(mp, true);
|
|
goto out;
|
|
}
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (br_port_group_equal(p, port, src))
|
|
goto found;
|
|
if ((unsigned long)p->key.port < (unsigned long)port)
|
|
break;
|
|
}
|
|
|
|
p = br_multicast_new_port_group(port, group, *pp, 0, src,
|
|
filter_mode, RTPROT_KERNEL);
|
|
if (unlikely(!p)) {
|
|
p = ERR_PTR(-ENOMEM);
|
|
goto out;
|
|
}
|
|
rcu_assign_pointer(*pp, p);
|
|
if (blocked)
|
|
p->flags |= MDB_PG_FLAGS_BLOCKED;
|
|
br_mdb_notify(br->dev, mp, p, RTM_NEWMDB);
|
|
|
|
found:
|
|
if (igmpv2_mldv1)
|
|
mod_timer(&p->timer, now + br->multicast_membership_interval);
|
|
|
|
out:
|
|
return p;
|
|
}
|
|
|
|
static int br_multicast_add_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct br_ip *group,
|
|
const unsigned char *src,
|
|
u8 filter_mode,
|
|
bool igmpv2_mldv1)
|
|
{
|
|
struct net_bridge_port_group *pg;
|
|
int err;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
pg = __br_multicast_add_group(br, port, group, src, filter_mode,
|
|
igmpv2_mldv1, false);
|
|
/* NULL is considered valid for host joined groups */
|
|
err = PTR_ERR_OR_ZERO(pg);
|
|
spin_unlock(&br->multicast_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int br_ip4_multicast_add_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
__be32 group,
|
|
__u16 vid,
|
|
const unsigned char *src,
|
|
bool igmpv2)
|
|
{
|
|
struct br_ip br_group;
|
|
u8 filter_mode;
|
|
|
|
if (ipv4_is_local_multicast(group))
|
|
return 0;
|
|
|
|
memset(&br_group, 0, sizeof(br_group));
|
|
br_group.dst.ip4 = group;
|
|
br_group.proto = htons(ETH_P_IP);
|
|
br_group.vid = vid;
|
|
filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
|
|
|
|
return br_multicast_add_group(br, port, &br_group, src, filter_mode,
|
|
igmpv2);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static int br_ip6_multicast_add_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
const struct in6_addr *group,
|
|
__u16 vid,
|
|
const unsigned char *src,
|
|
bool mldv1)
|
|
{
|
|
struct br_ip br_group;
|
|
u8 filter_mode;
|
|
|
|
if (ipv6_addr_is_ll_all_nodes(group))
|
|
return 0;
|
|
|
|
memset(&br_group, 0, sizeof(br_group));
|
|
br_group.dst.ip6 = *group;
|
|
br_group.proto = htons(ETH_P_IPV6);
|
|
br_group.vid = vid;
|
|
filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
|
|
|
|
return br_multicast_add_group(br, port, &br_group, src, filter_mode,
|
|
mldv1);
|
|
}
|
|
#endif
|
|
|
|
static void br_multicast_router_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge_port *port =
|
|
from_timer(port, t, multicast_router_timer);
|
|
struct net_bridge *br = port->br;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
|
|
port->multicast_router == MDB_RTR_TYPE_PERM ||
|
|
timer_pending(&port->multicast_router_timer))
|
|
goto out;
|
|
|
|
__del_port_router(port);
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_mc_router_state_change(struct net_bridge *p,
|
|
bool is_mc_router)
|
|
{
|
|
struct switchdev_attr attr = {
|
|
.orig_dev = p->dev,
|
|
.id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
|
|
.flags = SWITCHDEV_F_DEFER,
|
|
.u.mrouter = is_mc_router,
|
|
};
|
|
|
|
switchdev_port_attr_set(p->dev, &attr, NULL);
|
|
}
|
|
|
|
static void br_multicast_local_router_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge *br = from_timer(br, t, multicast_router_timer);
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
|
|
br->multicast_router == MDB_RTR_TYPE_PERM ||
|
|
timer_pending(&br->multicast_router_timer))
|
|
goto out;
|
|
|
|
br_mc_router_state_change(br, false);
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_multicast_querier_expired(struct net_bridge *br,
|
|
struct bridge_mcast_own_query *query)
|
|
{
|
|
spin_lock(&br->multicast_lock);
|
|
if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
goto out;
|
|
|
|
br_multicast_start_querier(br, query);
|
|
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_ip4_multicast_querier_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
|
|
|
|
br_multicast_querier_expired(br, &br->ip4_own_query);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void br_ip6_multicast_querier_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
|
|
|
|
br_multicast_querier_expired(br, &br->ip6_own_query);
|
|
}
|
|
#endif
|
|
|
|
static void br_multicast_select_own_querier(struct net_bridge *br,
|
|
struct br_ip *ip,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ip->proto == htons(ETH_P_IP))
|
|
br->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else
|
|
br->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
|
|
#endif
|
|
}
|
|
|
|
static void __br_multicast_send_query(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct net_bridge_port_group *pg,
|
|
struct br_ip *ip_dst,
|
|
struct br_ip *group,
|
|
bool with_srcs,
|
|
u8 sflag,
|
|
bool *need_rexmit)
|
|
{
|
|
bool over_lmqt = !!sflag;
|
|
struct sk_buff *skb;
|
|
u8 igmp_type;
|
|
|
|
again_under_lmqt:
|
|
skb = br_multicast_alloc_query(br, pg, ip_dst, group, with_srcs,
|
|
over_lmqt, sflag, &igmp_type,
|
|
need_rexmit);
|
|
if (!skb)
|
|
return;
|
|
|
|
if (port) {
|
|
skb->dev = port->dev;
|
|
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);
|
|
|
|
if (over_lmqt && with_srcs && sflag) {
|
|
over_lmqt = false;
|
|
goto again_under_lmqt;
|
|
}
|
|
} else {
|
|
br_multicast_select_own_querier(br, group, skb);
|
|
br_multicast_count(br, port, skb, igmp_type,
|
|
BR_MCAST_DIR_RX);
|
|
netif_rx(skb);
|
|
}
|
|
}
|
|
|
|
static void br_multicast_send_query(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct bridge_mcast_own_query *own_query)
|
|
{
|
|
struct bridge_mcast_other_query *other_query = NULL;
|
|
struct br_ip br_group;
|
|
unsigned long time;
|
|
|
|
if (!netif_running(br->dev) ||
|
|
!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
|
|
!br_opt_get(br, BROPT_MULTICAST_QUERIER))
|
|
return;
|
|
|
|
memset(&br_group.dst, 0, sizeof(br_group.dst));
|
|
|
|
if (port ? (own_query == &port->ip4_own_query) :
|
|
(own_query == &br->ip4_own_query)) {
|
|
other_query = &br->ip4_other_query;
|
|
br_group.proto = htons(ETH_P_IP);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
} else {
|
|
other_query = &br->ip6_other_query;
|
|
br_group.proto = htons(ETH_P_IPV6);
|
|
#endif
|
|
}
|
|
|
|
if (!other_query || timer_pending(&other_query->timer))
|
|
return;
|
|
|
|
__br_multicast_send_query(br, port, NULL, NULL, &br_group, false, 0,
|
|
NULL);
|
|
|
|
time = jiffies;
|
|
time += own_query->startup_sent < br->multicast_startup_query_count ?
|
|
br->multicast_startup_query_interval :
|
|
br->multicast_query_interval;
|
|
mod_timer(&own_query->timer, time);
|
|
}
|
|
|
|
static void
|
|
br_multicast_port_query_expired(struct net_bridge_port *port,
|
|
struct bridge_mcast_own_query *query)
|
|
{
|
|
struct net_bridge *br = port->br;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (port->state == BR_STATE_DISABLED ||
|
|
port->state == BR_STATE_BLOCKING)
|
|
goto out;
|
|
|
|
if (query->startup_sent < br->multicast_startup_query_count)
|
|
query->startup_sent++;
|
|
|
|
br_multicast_send_query(port->br, port, query);
|
|
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_ip4_multicast_port_query_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
|
|
|
|
br_multicast_port_query_expired(port, &port->ip4_own_query);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void br_ip6_multicast_port_query_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
|
|
|
|
br_multicast_port_query_expired(port, &port->ip6_own_query);
|
|
}
|
|
#endif
|
|
|
|
static void br_multicast_port_group_rexmit(struct timer_list *t)
|
|
{
|
|
struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
|
|
struct bridge_mcast_other_query *other_query = NULL;
|
|
struct net_bridge *br = pg->key.port->br;
|
|
bool need_rexmit = false;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
|
|
!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
|
|
!br_opt_get(br, BROPT_MULTICAST_QUERIER))
|
|
goto out;
|
|
|
|
if (pg->key.addr.proto == htons(ETH_P_IP))
|
|
other_query = &br->ip4_other_query;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else
|
|
other_query = &br->ip6_other_query;
|
|
#endif
|
|
|
|
if (!other_query || timer_pending(&other_query->timer))
|
|
goto out;
|
|
|
|
if (pg->grp_query_rexmit_cnt) {
|
|
pg->grp_query_rexmit_cnt--;
|
|
__br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
|
|
&pg->key.addr, false, 1, NULL);
|
|
}
|
|
__br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
|
|
&pg->key.addr, true, 0, &need_rexmit);
|
|
|
|
if (pg->grp_query_rexmit_cnt || need_rexmit)
|
|
mod_timer(&pg->rexmit_timer, jiffies +
|
|
br->multicast_last_member_interval);
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_mc_disabled_update(struct net_device *dev, bool value)
|
|
{
|
|
struct switchdev_attr attr = {
|
|
.orig_dev = dev,
|
|
.id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
|
|
.flags = SWITCHDEV_F_DEFER,
|
|
.u.mc_disabled = !value,
|
|
};
|
|
|
|
switchdev_port_attr_set(dev, &attr, NULL);
|
|
}
|
|
|
|
int br_multicast_add_port(struct net_bridge_port *port)
|
|
{
|
|
port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
|
|
port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
|
|
|
|
timer_setup(&port->multicast_router_timer,
|
|
br_multicast_router_expired, 0);
|
|
timer_setup(&port->ip4_own_query.timer,
|
|
br_ip4_multicast_port_query_expired, 0);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
timer_setup(&port->ip6_own_query.timer,
|
|
br_ip6_multicast_port_query_expired, 0);
|
|
#endif
|
|
br_mc_disabled_update(port->dev,
|
|
br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
|
|
|
|
port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
|
|
if (!port->mcast_stats)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void br_multicast_del_port(struct net_bridge_port *port)
|
|
{
|
|
struct net_bridge *br = port->br;
|
|
struct net_bridge_port_group *pg;
|
|
HLIST_HEAD(deleted_head);
|
|
struct hlist_node *n;
|
|
|
|
/* Take care of the remaining groups, only perm ones should be left */
|
|
spin_lock_bh(&br->multicast_lock);
|
|
hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
|
|
br_multicast_find_del_pg(br, pg);
|
|
hlist_move_list(&br->mcast_gc_list, &deleted_head);
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
br_multicast_gc(&deleted_head);
|
|
del_timer_sync(&port->multicast_router_timer);
|
|
free_percpu(port->mcast_stats);
|
|
}
|
|
|
|
static void br_multicast_enable(struct bridge_mcast_own_query *query)
|
|
{
|
|
query->startup_sent = 0;
|
|
|
|
if (try_to_del_timer_sync(&query->timer) >= 0 ||
|
|
del_timer(&query->timer))
|
|
mod_timer(&query->timer, jiffies);
|
|
}
|
|
|
|
static void __br_multicast_enable_port(struct net_bridge_port *port)
|
|
{
|
|
struct net_bridge *br = port->br;
|
|
|
|
if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
|
|
return;
|
|
|
|
br_multicast_enable(&port->ip4_own_query);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
br_multicast_enable(&port->ip6_own_query);
|
|
#endif
|
|
if (port->multicast_router == MDB_RTR_TYPE_PERM &&
|
|
hlist_unhashed(&port->rlist))
|
|
br_multicast_add_router(br, port);
|
|
}
|
|
|
|
void br_multicast_enable_port(struct net_bridge_port *port)
|
|
{
|
|
struct net_bridge *br = port->br;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
__br_multicast_enable_port(port);
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
void br_multicast_disable_port(struct net_bridge_port *port)
|
|
{
|
|
struct net_bridge *br = port->br;
|
|
struct net_bridge_port_group *pg;
|
|
struct hlist_node *n;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
|
|
if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
|
|
br_multicast_find_del_pg(br, pg);
|
|
|
|
__del_port_router(port);
|
|
|
|
del_timer(&port->multicast_router_timer);
|
|
del_timer(&port->ip4_own_query.timer);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
del_timer(&port->ip6_own_query.timer);
|
|
#endif
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
struct hlist_node *tmp;
|
|
int deleted = 0;
|
|
|
|
hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
|
|
if (ent->flags & BR_SGRP_F_DELETE) {
|
|
br_multicast_del_group_src(ent, false);
|
|
deleted++;
|
|
}
|
|
|
|
return deleted;
|
|
}
|
|
|
|
static void __grp_src_mod_timer(struct net_bridge_group_src *src,
|
|
unsigned long expires)
|
|
{
|
|
mod_timer(&src->timer, expires);
|
|
br_multicast_fwd_src_handle(src);
|
|
}
|
|
|
|
static void __grp_src_query_marked_and_rexmit(struct net_bridge_port_group *pg)
|
|
{
|
|
struct bridge_mcast_other_query *other_query = NULL;
|
|
struct net_bridge *br = pg->key.port->br;
|
|
u32 lmqc = br->multicast_last_member_count;
|
|
unsigned long lmqt, lmi, now = jiffies;
|
|
struct net_bridge_group_src *ent;
|
|
|
|
if (!netif_running(br->dev) ||
|
|
!br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return;
|
|
|
|
if (pg->key.addr.proto == htons(ETH_P_IP))
|
|
other_query = &br->ip4_other_query;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else
|
|
other_query = &br->ip6_other_query;
|
|
#endif
|
|
|
|
lmqt = now + br_multicast_lmqt(br);
|
|
hlist_for_each_entry(ent, &pg->src_list, node) {
|
|
if (ent->flags & BR_SGRP_F_SEND) {
|
|
ent->flags &= ~BR_SGRP_F_SEND;
|
|
if (ent->timer.expires > lmqt) {
|
|
if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
|
|
other_query &&
|
|
!timer_pending(&other_query->timer))
|
|
ent->src_query_rexmit_cnt = lmqc;
|
|
__grp_src_mod_timer(ent, lmqt);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!br_opt_get(br, BROPT_MULTICAST_QUERIER) ||
|
|
!other_query || timer_pending(&other_query->timer))
|
|
return;
|
|
|
|
__br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
|
|
&pg->key.addr, true, 1, NULL);
|
|
|
|
lmi = now + br->multicast_last_member_interval;
|
|
if (!timer_pending(&pg->rexmit_timer) ||
|
|
time_after(pg->rexmit_timer.expires, lmi))
|
|
mod_timer(&pg->rexmit_timer, lmi);
|
|
}
|
|
|
|
static void __grp_send_query_and_rexmit(struct net_bridge_port_group *pg)
|
|
{
|
|
struct bridge_mcast_other_query *other_query = NULL;
|
|
struct net_bridge *br = pg->key.port->br;
|
|
unsigned long now = jiffies, lmi;
|
|
|
|
if (!netif_running(br->dev) ||
|
|
!br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return;
|
|
|
|
if (pg->key.addr.proto == htons(ETH_P_IP))
|
|
other_query = &br->ip4_other_query;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else
|
|
other_query = &br->ip6_other_query;
|
|
#endif
|
|
|
|
if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
|
|
other_query && !timer_pending(&other_query->timer)) {
|
|
lmi = now + br->multicast_last_member_interval;
|
|
pg->grp_query_rexmit_cnt = br->multicast_last_member_count - 1;
|
|
__br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
|
|
&pg->key.addr, false, 0, NULL);
|
|
if (!timer_pending(&pg->rexmit_timer) ||
|
|
time_after(pg->rexmit_timer.expires, lmi))
|
|
mod_timer(&pg->rexmit_timer, lmi);
|
|
}
|
|
|
|
if (pg->filter_mode == MCAST_EXCLUDE &&
|
|
(!timer_pending(&pg->timer) ||
|
|
time_after(pg->timer.expires, now + br_multicast_lmqt(br))))
|
|
mod_timer(&pg->timer, now + br_multicast_lmqt(br));
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
|
|
* INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
|
|
* EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
|
|
*/
|
|
static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
struct net_bridge_group_src *ent;
|
|
unsigned long now = jiffies;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
u32 src_idx;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (!ent) {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent)
|
|
changed = true;
|
|
}
|
|
|
|
if (ent)
|
|
__grp_src_mod_timer(ent, now + br_multicast_gmi(br));
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
|
|
* Delete (A-B)
|
|
* Group Timer=GMI
|
|
*/
|
|
static void __grp_src_isexc_incl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
struct br_ip src_ip;
|
|
u32 src_idx;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags |= BR_SGRP_F_DELETE;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent)
|
|
ent->flags &= ~BR_SGRP_F_DELETE;
|
|
else
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent)
|
|
br_multicast_fwd_src_handle(ent);
|
|
}
|
|
|
|
br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type);
|
|
|
|
__grp_src_delete_marked(pg);
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
|
|
* Delete (X-A)
|
|
* Delete (Y-A)
|
|
* Group Timer=GMI
|
|
*/
|
|
static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
struct net_bridge_group_src *ent;
|
|
unsigned long now = jiffies;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
u32 src_idx;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags |= BR_SGRP_F_DELETE;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
ent->flags &= ~BR_SGRP_F_DELETE;
|
|
} else {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
__grp_src_mod_timer(ent,
|
|
now + br_multicast_gmi(br));
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
if (__grp_src_delete_marked(pg))
|
|
changed = true;
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_isexc(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
bool changed = false;
|
|
|
|
switch (pg->filter_mode) {
|
|
case MCAST_INCLUDE:
|
|
__grp_src_isexc_incl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
|
|
changed = true;
|
|
break;
|
|
case MCAST_EXCLUDE:
|
|
changed = __grp_src_isexc_excl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
break;
|
|
}
|
|
|
|
pg->filter_mode = MCAST_EXCLUDE;
|
|
mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
|
|
* Send Q(G,A-B)
|
|
*/
|
|
static bool __grp_src_toin_incl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
u32 src_idx, to_send = pg->src_ents;
|
|
struct net_bridge_group_src *ent;
|
|
unsigned long now = jiffies;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags |= BR_SGRP_F_SEND;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
ent->flags &= ~BR_SGRP_F_SEND;
|
|
to_send--;
|
|
} else {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent)
|
|
changed = true;
|
|
}
|
|
if (ent)
|
|
__grp_src_mod_timer(ent, now + br_multicast_gmi(br));
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
if (to_send)
|
|
__grp_src_query_marked_and_rexmit(pg);
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
|
|
* Send Q(G,X-A)
|
|
* Send Q(G)
|
|
*/
|
|
static bool __grp_src_toin_excl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
u32 src_idx, to_send = pg->src_ents;
|
|
struct net_bridge_group_src *ent;
|
|
unsigned long now = jiffies;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
if (timer_pending(&ent->timer))
|
|
ent->flags |= BR_SGRP_F_SEND;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
if (timer_pending(&ent->timer)) {
|
|
ent->flags &= ~BR_SGRP_F_SEND;
|
|
to_send--;
|
|
}
|
|
} else {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent)
|
|
changed = true;
|
|
}
|
|
if (ent)
|
|
__grp_src_mod_timer(ent, now + br_multicast_gmi(br));
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
if (to_send)
|
|
__grp_src_query_marked_and_rexmit(pg);
|
|
|
|
__grp_send_query_and_rexmit(pg);
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_toin(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
bool changed = false;
|
|
|
|
switch (pg->filter_mode) {
|
|
case MCAST_INCLUDE:
|
|
changed = __grp_src_toin_incl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
break;
|
|
case MCAST_EXCLUDE:
|
|
changed = __grp_src_toin_excl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
break;
|
|
}
|
|
|
|
if (br_multicast_eht_should_del_pg(pg)) {
|
|
pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
|
|
br_multicast_find_del_pg(pg->key.port->br, pg);
|
|
/* a notification has already been sent and we shouldn't
|
|
* access pg after the delete so we have to return false
|
|
*/
|
|
changed = false;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
|
|
* Delete (A-B)
|
|
* Send Q(G,A*B)
|
|
* Group Timer=GMI
|
|
*/
|
|
static void __grp_src_toex_incl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
u32 src_idx, to_send = 0;
|
|
struct br_ip src_ip;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
|
|
BR_SGRP_F_SEND;
|
|
to_send++;
|
|
} else {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
}
|
|
if (ent)
|
|
br_multicast_fwd_src_handle(ent);
|
|
}
|
|
|
|
br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type);
|
|
|
|
__grp_src_delete_marked(pg);
|
|
if (to_send)
|
|
__grp_src_query_marked_and_rexmit(pg);
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
|
|
* Delete (X-A)
|
|
* Delete (Y-A)
|
|
* Send Q(G,A-Y)
|
|
* Group Timer=GMI
|
|
*/
|
|
static bool __grp_src_toex_excl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
u32 src_idx, to_send = 0;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
ent->flags &= ~BR_SGRP_F_DELETE;
|
|
} else {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
__grp_src_mod_timer(ent, pg->timer.expires);
|
|
changed = true;
|
|
}
|
|
}
|
|
if (ent && timer_pending(&ent->timer)) {
|
|
ent->flags |= BR_SGRP_F_SEND;
|
|
to_send++;
|
|
}
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
if (__grp_src_delete_marked(pg))
|
|
changed = true;
|
|
if (to_send)
|
|
__grp_src_query_marked_and_rexmit(pg);
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_toex(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
struct net_bridge *br = pg->key.port->br;
|
|
bool changed = false;
|
|
|
|
switch (pg->filter_mode) {
|
|
case MCAST_INCLUDE:
|
|
__grp_src_toex_incl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
|
|
changed = true;
|
|
break;
|
|
case MCAST_EXCLUDE:
|
|
changed = __grp_src_toex_excl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
break;
|
|
}
|
|
|
|
pg->filter_mode = MCAST_EXCLUDE;
|
|
mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
|
|
*/
|
|
static bool __grp_src_block_incl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
u32 src_idx, to_send = 0;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags &= ~BR_SGRP_F_SEND;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
ent->flags |= BR_SGRP_F_SEND;
|
|
to_send++;
|
|
}
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
if (to_send)
|
|
__grp_src_query_marked_and_rexmit(pg);
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* State Msg type New state Actions
|
|
* EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
|
|
* Send Q(G,A-Y)
|
|
*/
|
|
static bool __grp_src_block_excl(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
u32 src_idx, to_send = 0;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags &= ~BR_SGRP_F_SEND;
|
|
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
|
|
ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (!ent) {
|
|
ent = br_multicast_new_group_src(pg, &src_ip);
|
|
if (ent) {
|
|
__grp_src_mod_timer(ent, pg->timer.expires);
|
|
changed = true;
|
|
}
|
|
}
|
|
if (ent && timer_pending(&ent->timer)) {
|
|
ent->flags |= BR_SGRP_F_SEND;
|
|
to_send++;
|
|
}
|
|
}
|
|
|
|
if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
|
|
changed = true;
|
|
|
|
if (to_send)
|
|
__grp_src_query_marked_and_rexmit(pg);
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_block(struct net_bridge_port_group *pg, void *h_addr,
|
|
void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
|
|
{
|
|
bool changed = false;
|
|
|
|
switch (pg->filter_mode) {
|
|
case MCAST_INCLUDE:
|
|
changed = __grp_src_block_incl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
break;
|
|
case MCAST_EXCLUDE:
|
|
changed = __grp_src_block_excl(pg, h_addr, srcs, nsrcs, addr_size,
|
|
grec_type);
|
|
break;
|
|
}
|
|
|
|
if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
|
|
br_multicast_eht_should_del_pg(pg)) {
|
|
if (br_multicast_eht_should_del_pg(pg))
|
|
pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
|
|
br_multicast_find_del_pg(pg->key.port->br, pg);
|
|
/* a notification has already been sent and we shouldn't
|
|
* access pg after the delete so we have to return false
|
|
*/
|
|
changed = false;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static struct net_bridge_port_group *
|
|
br_multicast_find_port(struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_port *p,
|
|
const unsigned char *src)
|
|
{
|
|
struct net_bridge *br __maybe_unused = mp->br;
|
|
struct net_bridge_port_group *pg;
|
|
|
|
for (pg = mlock_dereference(mp->ports, br);
|
|
pg;
|
|
pg = mlock_dereference(pg->next, br))
|
|
if (br_port_group_equal(pg, p, src))
|
|
return pg;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb,
|
|
u16 vid)
|
|
{
|
|
bool igmpv2 = br->multicast_igmp_version == 2;
|
|
struct net_bridge_mdb_entry *mdst;
|
|
struct net_bridge_port_group *pg;
|
|
const unsigned char *src;
|
|
struct igmpv3_report *ih;
|
|
struct igmpv3_grec *grec;
|
|
int i, len, num, type;
|
|
__be32 group, *h_addr;
|
|
bool changed = false;
|
|
int err = 0;
|
|
u16 nsrcs;
|
|
|
|
ih = igmpv3_report_hdr(skb);
|
|
num = ntohs(ih->ngrec);
|
|
len = skb_transport_offset(skb) + sizeof(*ih);
|
|
|
|
for (i = 0; i < num; i++) {
|
|
len += sizeof(*grec);
|
|
if (!ip_mc_may_pull(skb, len))
|
|
return -EINVAL;
|
|
|
|
grec = (void *)(skb->data + len - sizeof(*grec));
|
|
group = grec->grec_mca;
|
|
type = grec->grec_type;
|
|
nsrcs = ntohs(grec->grec_nsrcs);
|
|
|
|
len += nsrcs * 4;
|
|
if (!ip_mc_may_pull(skb, len))
|
|
return -EINVAL;
|
|
|
|
switch (type) {
|
|
case IGMPV3_MODE_IS_INCLUDE:
|
|
case IGMPV3_MODE_IS_EXCLUDE:
|
|
case IGMPV3_CHANGE_TO_INCLUDE:
|
|
case IGMPV3_CHANGE_TO_EXCLUDE:
|
|
case IGMPV3_ALLOW_NEW_SOURCES:
|
|
case IGMPV3_BLOCK_OLD_SOURCES:
|
|
break;
|
|
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
src = eth_hdr(skb)->h_source;
|
|
if (nsrcs == 0 &&
|
|
(type == IGMPV3_CHANGE_TO_INCLUDE ||
|
|
type == IGMPV3_MODE_IS_INCLUDE)) {
|
|
if (!port || igmpv2) {
|
|
br_ip4_multicast_leave_group(br, port, group, vid, src);
|
|
continue;
|
|
}
|
|
} else {
|
|
err = br_ip4_multicast_add_group(br, port, group, vid,
|
|
src, igmpv2);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
if (!port || igmpv2)
|
|
continue;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
mdst = br_mdb_ip4_get(br, group, vid);
|
|
if (!mdst)
|
|
goto unlock_continue;
|
|
pg = br_multicast_find_port(mdst, port, src);
|
|
if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
|
|
goto unlock_continue;
|
|
/* reload grec and host addr */
|
|
grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
|
|
h_addr = &ip_hdr(skb)->saddr;
|
|
switch (type) {
|
|
case IGMPV3_ALLOW_NEW_SOURCES:
|
|
changed = br_multicast_isinc_allow(pg, h_addr, grec->grec_src,
|
|
nsrcs, sizeof(__be32), type);
|
|
break;
|
|
case IGMPV3_MODE_IS_INCLUDE:
|
|
changed = br_multicast_isinc_allow(pg, h_addr, grec->grec_src,
|
|
nsrcs, sizeof(__be32), type);
|
|
break;
|
|
case IGMPV3_MODE_IS_EXCLUDE:
|
|
changed = br_multicast_isexc(pg, h_addr, grec->grec_src,
|
|
nsrcs, sizeof(__be32), type);
|
|
break;
|
|
case IGMPV3_CHANGE_TO_INCLUDE:
|
|
changed = br_multicast_toin(pg, h_addr, grec->grec_src,
|
|
nsrcs, sizeof(__be32), type);
|
|
break;
|
|
case IGMPV3_CHANGE_TO_EXCLUDE:
|
|
changed = br_multicast_toex(pg, h_addr, grec->grec_src,
|
|
nsrcs, sizeof(__be32), type);
|
|
break;
|
|
case IGMPV3_BLOCK_OLD_SOURCES:
|
|
changed = br_multicast_block(pg, h_addr, grec->grec_src,
|
|
nsrcs, sizeof(__be32), type);
|
|
break;
|
|
}
|
|
if (changed)
|
|
br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
|
|
unlock_continue:
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static int br_ip6_multicast_mld2_report(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb,
|
|
u16 vid)
|
|
{
|
|
bool mldv1 = br->multicast_mld_version == 1;
|
|
struct net_bridge_mdb_entry *mdst;
|
|
struct net_bridge_port_group *pg;
|
|
unsigned int nsrcs_offset;
|
|
const unsigned char *src;
|
|
struct icmp6hdr *icmp6h;
|
|
struct in6_addr *h_addr;
|
|
struct mld2_grec *grec;
|
|
unsigned int grec_len;
|
|
bool changed = false;
|
|
int i, len, num;
|
|
int err = 0;
|
|
|
|
if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
|
|
return -EINVAL;
|
|
|
|
icmp6h = icmp6_hdr(skb);
|
|
num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
|
|
len = skb_transport_offset(skb) + sizeof(*icmp6h);
|
|
|
|
for (i = 0; i < num; i++) {
|
|
__be16 *_nsrcs, __nsrcs;
|
|
u16 nsrcs;
|
|
|
|
nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
|
|
|
|
if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
|
|
nsrcs_offset + sizeof(__nsrcs))
|
|
return -EINVAL;
|
|
|
|
_nsrcs = skb_header_pointer(skb, nsrcs_offset,
|
|
sizeof(__nsrcs), &__nsrcs);
|
|
if (!_nsrcs)
|
|
return -EINVAL;
|
|
|
|
nsrcs = ntohs(*_nsrcs);
|
|
grec_len = struct_size(grec, grec_src, nsrcs);
|
|
|
|
if (!ipv6_mc_may_pull(skb, len + grec_len))
|
|
return -EINVAL;
|
|
|
|
grec = (struct mld2_grec *)(skb->data + len);
|
|
len += grec_len;
|
|
|
|
switch (grec->grec_type) {
|
|
case MLD2_MODE_IS_INCLUDE:
|
|
case MLD2_MODE_IS_EXCLUDE:
|
|
case MLD2_CHANGE_TO_INCLUDE:
|
|
case MLD2_CHANGE_TO_EXCLUDE:
|
|
case MLD2_ALLOW_NEW_SOURCES:
|
|
case MLD2_BLOCK_OLD_SOURCES:
|
|
break;
|
|
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
src = eth_hdr(skb)->h_source;
|
|
if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
|
|
grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
|
|
nsrcs == 0) {
|
|
if (!port || mldv1) {
|
|
br_ip6_multicast_leave_group(br, port,
|
|
&grec->grec_mca,
|
|
vid, src);
|
|
continue;
|
|
}
|
|
} else {
|
|
err = br_ip6_multicast_add_group(br, port,
|
|
&grec->grec_mca, vid,
|
|
src, mldv1);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
if (!port || mldv1)
|
|
continue;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
mdst = br_mdb_ip6_get(br, &grec->grec_mca, vid);
|
|
if (!mdst)
|
|
goto unlock_continue;
|
|
pg = br_multicast_find_port(mdst, port, src);
|
|
if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
|
|
goto unlock_continue;
|
|
h_addr = &ipv6_hdr(skb)->saddr;
|
|
switch (grec->grec_type) {
|
|
case MLD2_ALLOW_NEW_SOURCES:
|
|
changed = br_multicast_isinc_allow(pg, h_addr,
|
|
grec->grec_src, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
grec->grec_type);
|
|
break;
|
|
case MLD2_MODE_IS_INCLUDE:
|
|
changed = br_multicast_isinc_allow(pg, h_addr,
|
|
grec->grec_src, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
grec->grec_type);
|
|
break;
|
|
case MLD2_MODE_IS_EXCLUDE:
|
|
changed = br_multicast_isexc(pg, h_addr,
|
|
grec->grec_src, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
grec->grec_type);
|
|
break;
|
|
case MLD2_CHANGE_TO_INCLUDE:
|
|
changed = br_multicast_toin(pg, h_addr,
|
|
grec->grec_src, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
grec->grec_type);
|
|
break;
|
|
case MLD2_CHANGE_TO_EXCLUDE:
|
|
changed = br_multicast_toex(pg, h_addr,
|
|
grec->grec_src, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
grec->grec_type);
|
|
break;
|
|
case MLD2_BLOCK_OLD_SOURCES:
|
|
changed = br_multicast_block(pg, h_addr,
|
|
grec->grec_src, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
grec->grec_type);
|
|
break;
|
|
}
|
|
if (changed)
|
|
br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
|
|
unlock_continue:
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
static bool br_ip4_multicast_select_querier(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
__be32 saddr)
|
|
{
|
|
if (!timer_pending(&br->ip4_own_query.timer) &&
|
|
!timer_pending(&br->ip4_other_query.timer))
|
|
goto update;
|
|
|
|
if (!br->ip4_querier.addr.src.ip4)
|
|
goto update;
|
|
|
|
if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.src.ip4))
|
|
goto update;
|
|
|
|
return false;
|
|
|
|
update:
|
|
br->ip4_querier.addr.src.ip4 = saddr;
|
|
|
|
/* update protected by general multicast_lock by caller */
|
|
rcu_assign_pointer(br->ip4_querier.port, port);
|
|
|
|
return true;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static bool br_ip6_multicast_select_querier(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct in6_addr *saddr)
|
|
{
|
|
if (!timer_pending(&br->ip6_own_query.timer) &&
|
|
!timer_pending(&br->ip6_other_query.timer))
|
|
goto update;
|
|
|
|
if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.src.ip6) <= 0)
|
|
goto update;
|
|
|
|
return false;
|
|
|
|
update:
|
|
br->ip6_querier.addr.src.ip6 = *saddr;
|
|
|
|
/* update protected by general multicast_lock by caller */
|
|
rcu_assign_pointer(br->ip6_querier.port, port);
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
static bool br_multicast_select_querier(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct br_ip *saddr)
|
|
{
|
|
switch (saddr->proto) {
|
|
case htons(ETH_P_IP):
|
|
return br_ip4_multicast_select_querier(br, port, saddr->src.ip4);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6):
|
|
return br_ip6_multicast_select_querier(br, port, &saddr->src.ip6);
|
|
#endif
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
br_multicast_update_query_timer(struct net_bridge *br,
|
|
struct bridge_mcast_other_query *query,
|
|
unsigned long max_delay)
|
|
{
|
|
if (!timer_pending(&query->timer))
|
|
query->delay_time = jiffies + max_delay;
|
|
|
|
mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
|
|
}
|
|
|
|
static void br_port_mc_router_state_change(struct net_bridge_port *p,
|
|
bool is_mc_router)
|
|
{
|
|
struct switchdev_attr attr = {
|
|
.orig_dev = p->dev,
|
|
.id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
|
|
.flags = SWITCHDEV_F_DEFER,
|
|
.u.mrouter = is_mc_router,
|
|
};
|
|
|
|
switchdev_port_attr_set(p->dev, &attr, NULL);
|
|
}
|
|
|
|
/*
|
|
* Add port to router_list
|
|
* list is maintained ordered by pointer value
|
|
* and locked by br->multicast_lock and RCU
|
|
*/
|
|
static void br_multicast_add_router(struct net_bridge *br,
|
|
struct net_bridge_port *port)
|
|
{
|
|
struct net_bridge_port *p;
|
|
struct hlist_node *slot = NULL;
|
|
|
|
if (!hlist_unhashed(&port->rlist))
|
|
return;
|
|
|
|
hlist_for_each_entry(p, &br->router_list, rlist) {
|
|
if ((unsigned long) port >= (unsigned long) p)
|
|
break;
|
|
slot = &p->rlist;
|
|
}
|
|
|
|
if (slot)
|
|
hlist_add_behind_rcu(&port->rlist, slot);
|
|
else
|
|
hlist_add_head_rcu(&port->rlist, &br->router_list);
|
|
br_rtr_notify(br->dev, port, RTM_NEWMDB);
|
|
br_port_mc_router_state_change(port, true);
|
|
}
|
|
|
|
static void br_multicast_mark_router(struct net_bridge *br,
|
|
struct net_bridge_port *port)
|
|
{
|
|
unsigned long now = jiffies;
|
|
|
|
if (!port) {
|
|
if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
|
|
if (!timer_pending(&br->multicast_router_timer))
|
|
br_mc_router_state_change(br, true);
|
|
mod_timer(&br->multicast_router_timer,
|
|
now + br->multicast_querier_interval);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
|
|
port->multicast_router == MDB_RTR_TYPE_PERM)
|
|
return;
|
|
|
|
br_multicast_add_router(br, port);
|
|
|
|
mod_timer(&port->multicast_router_timer,
|
|
now + br->multicast_querier_interval);
|
|
}
|
|
|
|
static void br_multicast_query_received(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct bridge_mcast_other_query *query,
|
|
struct br_ip *saddr,
|
|
unsigned long max_delay)
|
|
{
|
|
if (!br_multicast_select_querier(br, port, saddr))
|
|
return;
|
|
|
|
br_multicast_update_query_timer(br, query, max_delay);
|
|
br_multicast_mark_router(br, port);
|
|
}
|
|
|
|
static void br_ip4_multicast_query(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb,
|
|
u16 vid)
|
|
{
|
|
unsigned int transport_len = ip_transport_len(skb);
|
|
const struct iphdr *iph = ip_hdr(skb);
|
|
struct igmphdr *ih = igmp_hdr(skb);
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct igmpv3_query *ih3;
|
|
struct net_bridge_port_group *p;
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct br_ip saddr;
|
|
unsigned long max_delay;
|
|
unsigned long now = jiffies;
|
|
__be32 group;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (!netif_running(br->dev) ||
|
|
(port && port->state == BR_STATE_DISABLED))
|
|
goto out;
|
|
|
|
group = ih->group;
|
|
|
|
if (transport_len == sizeof(*ih)) {
|
|
max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
|
|
|
|
if (!max_delay) {
|
|
max_delay = 10 * HZ;
|
|
group = 0;
|
|
}
|
|
} else if (transport_len >= sizeof(*ih3)) {
|
|
ih3 = igmpv3_query_hdr(skb);
|
|
if (ih3->nsrcs ||
|
|
(br->multicast_igmp_version == 3 && group && ih3->suppress))
|
|
goto out;
|
|
|
|
max_delay = ih3->code ?
|
|
IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
|
|
} else {
|
|
goto out;
|
|
}
|
|
|
|
if (!group) {
|
|
saddr.proto = htons(ETH_P_IP);
|
|
saddr.src.ip4 = iph->saddr;
|
|
|
|
br_multicast_query_received(br, port, &br->ip4_other_query,
|
|
&saddr, max_delay);
|
|
goto out;
|
|
}
|
|
|
|
mp = br_mdb_ip4_get(br, group, vid);
|
|
if (!mp)
|
|
goto out;
|
|
|
|
max_delay *= br->multicast_last_member_count;
|
|
|
|
if (mp->host_joined &&
|
|
(timer_pending(&mp->timer) ?
|
|
time_after(mp->timer.expires, now + max_delay) :
|
|
try_to_del_timer_sync(&mp->timer) >= 0))
|
|
mod_timer(&mp->timer, now + max_delay);
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (timer_pending(&p->timer) ?
|
|
time_after(p->timer.expires, now + max_delay) :
|
|
try_to_del_timer_sync(&p->timer) >= 0 &&
|
|
(br->multicast_igmp_version == 2 ||
|
|
p->filter_mode == MCAST_EXCLUDE))
|
|
mod_timer(&p->timer, now + max_delay);
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static int br_ip6_multicast_query(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb,
|
|
u16 vid)
|
|
{
|
|
unsigned int transport_len = ipv6_transport_len(skb);
|
|
struct mld_msg *mld;
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct mld2_query *mld2q;
|
|
struct net_bridge_port_group *p;
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct br_ip saddr;
|
|
unsigned long max_delay;
|
|
unsigned long now = jiffies;
|
|
unsigned int offset = skb_transport_offset(skb);
|
|
const struct in6_addr *group = NULL;
|
|
bool is_general_query;
|
|
int err = 0;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (!netif_running(br->dev) ||
|
|
(port && port->state == BR_STATE_DISABLED))
|
|
goto out;
|
|
|
|
if (transport_len == sizeof(*mld)) {
|
|
if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
mld = (struct mld_msg *) icmp6_hdr(skb);
|
|
max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
|
|
if (max_delay)
|
|
group = &mld->mld_mca;
|
|
} else {
|
|
if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
mld2q = (struct mld2_query *)icmp6_hdr(skb);
|
|
if (!mld2q->mld2q_nsrcs)
|
|
group = &mld2q->mld2q_mca;
|
|
if (br->multicast_mld_version == 2 &&
|
|
!ipv6_addr_any(&mld2q->mld2q_mca) &&
|
|
mld2q->mld2q_suppress)
|
|
goto out;
|
|
|
|
max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
|
|
}
|
|
|
|
is_general_query = group && ipv6_addr_any(group);
|
|
|
|
if (is_general_query) {
|
|
saddr.proto = htons(ETH_P_IPV6);
|
|
saddr.src.ip6 = ipv6_hdr(skb)->saddr;
|
|
|
|
br_multicast_query_received(br, port, &br->ip6_other_query,
|
|
&saddr, max_delay);
|
|
goto out;
|
|
} else if (!group) {
|
|
goto out;
|
|
}
|
|
|
|
mp = br_mdb_ip6_get(br, group, vid);
|
|
if (!mp)
|
|
goto out;
|
|
|
|
max_delay *= br->multicast_last_member_count;
|
|
if (mp->host_joined &&
|
|
(timer_pending(&mp->timer) ?
|
|
time_after(mp->timer.expires, now + max_delay) :
|
|
try_to_del_timer_sync(&mp->timer) >= 0))
|
|
mod_timer(&mp->timer, now + max_delay);
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (timer_pending(&p->timer) ?
|
|
time_after(p->timer.expires, now + max_delay) :
|
|
try_to_del_timer_sync(&p->timer) >= 0 &&
|
|
(br->multicast_mld_version == 1 ||
|
|
p->filter_mode == MCAST_EXCLUDE))
|
|
mod_timer(&p->timer, now + max_delay);
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
br_multicast_leave_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct br_ip *group,
|
|
struct bridge_mcast_other_query *other_query,
|
|
struct bridge_mcast_own_query *own_query,
|
|
const unsigned char *src)
|
|
{
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct net_bridge_port_group *p;
|
|
unsigned long now;
|
|
unsigned long time;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (!netif_running(br->dev) ||
|
|
(port && port->state == BR_STATE_DISABLED))
|
|
goto out;
|
|
|
|
mp = br_mdb_ip_get(br, group);
|
|
if (!mp)
|
|
goto out;
|
|
|
|
if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
|
|
struct net_bridge_port_group __rcu **pp;
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (!br_port_group_equal(p, port, src))
|
|
continue;
|
|
|
|
if (p->flags & MDB_PG_FLAGS_PERMANENT)
|
|
break;
|
|
|
|
p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
|
|
br_multicast_del_pg(mp, p, pp);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (timer_pending(&other_query->timer))
|
|
goto out;
|
|
|
|
if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
|
|
__br_multicast_send_query(br, port, NULL, NULL, &mp->addr,
|
|
false, 0, NULL);
|
|
|
|
time = jiffies + br->multicast_last_member_count *
|
|
br->multicast_last_member_interval;
|
|
|
|
mod_timer(&own_query->timer, time);
|
|
|
|
for (p = mlock_dereference(mp->ports, br);
|
|
p != NULL;
|
|
p = mlock_dereference(p->next, br)) {
|
|
if (!br_port_group_equal(p, port, src))
|
|
continue;
|
|
|
|
if (!hlist_unhashed(&p->mglist) &&
|
|
(timer_pending(&p->timer) ?
|
|
time_after(p->timer.expires, time) :
|
|
try_to_del_timer_sync(&p->timer) >= 0)) {
|
|
mod_timer(&p->timer, time);
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
now = jiffies;
|
|
time = now + br->multicast_last_member_count *
|
|
br->multicast_last_member_interval;
|
|
|
|
if (!port) {
|
|
if (mp->host_joined &&
|
|
(timer_pending(&mp->timer) ?
|
|
time_after(mp->timer.expires, time) :
|
|
try_to_del_timer_sync(&mp->timer) >= 0)) {
|
|
mod_timer(&mp->timer, time);
|
|
}
|
|
|
|
goto out;
|
|
}
|
|
|
|
for (p = mlock_dereference(mp->ports, br);
|
|
p != NULL;
|
|
p = mlock_dereference(p->next, br)) {
|
|
if (p->key.port != port)
|
|
continue;
|
|
|
|
if (!hlist_unhashed(&p->mglist) &&
|
|
(timer_pending(&p->timer) ?
|
|
time_after(p->timer.expires, time) :
|
|
try_to_del_timer_sync(&p->timer) >= 0)) {
|
|
mod_timer(&p->timer, time);
|
|
}
|
|
|
|
break;
|
|
}
|
|
out:
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_ip4_multicast_leave_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
__be32 group,
|
|
__u16 vid,
|
|
const unsigned char *src)
|
|
{
|
|
struct br_ip br_group;
|
|
struct bridge_mcast_own_query *own_query;
|
|
|
|
if (ipv4_is_local_multicast(group))
|
|
return;
|
|
|
|
own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
|
|
|
|
memset(&br_group, 0, sizeof(br_group));
|
|
br_group.dst.ip4 = group;
|
|
br_group.proto = htons(ETH_P_IP);
|
|
br_group.vid = vid;
|
|
|
|
br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
|
|
own_query, src);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void br_ip6_multicast_leave_group(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
const struct in6_addr *group,
|
|
__u16 vid,
|
|
const unsigned char *src)
|
|
{
|
|
struct br_ip br_group;
|
|
struct bridge_mcast_own_query *own_query;
|
|
|
|
if (ipv6_addr_is_ll_all_nodes(group))
|
|
return;
|
|
|
|
own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
|
|
|
|
memset(&br_group, 0, sizeof(br_group));
|
|
br_group.dst.ip6 = *group;
|
|
br_group.proto = htons(ETH_P_IPV6);
|
|
br_group.vid = vid;
|
|
|
|
br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
|
|
own_query, src);
|
|
}
|
|
#endif
|
|
|
|
static void br_multicast_err_count(const struct net_bridge *br,
|
|
const struct net_bridge_port *p,
|
|
__be16 proto)
|
|
{
|
|
struct bridge_mcast_stats __percpu *stats;
|
|
struct bridge_mcast_stats *pstats;
|
|
|
|
if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
|
|
return;
|
|
|
|
if (p)
|
|
stats = p->mcast_stats;
|
|
else
|
|
stats = br->mcast_stats;
|
|
if (WARN_ON(!stats))
|
|
return;
|
|
|
|
pstats = this_cpu_ptr(stats);
|
|
|
|
u64_stats_update_begin(&pstats->syncp);
|
|
switch (proto) {
|
|
case htons(ETH_P_IP):
|
|
pstats->mstats.igmp_parse_errors++;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6):
|
|
pstats->mstats.mld_parse_errors++;
|
|
break;
|
|
#endif
|
|
}
|
|
u64_stats_update_end(&pstats->syncp);
|
|
}
|
|
|
|
static void br_multicast_pim(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
const struct sk_buff *skb)
|
|
{
|
|
unsigned int offset = skb_transport_offset(skb);
|
|
struct pimhdr *pimhdr, _pimhdr;
|
|
|
|
pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
|
|
if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
|
|
pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
|
|
return;
|
|
|
|
br_multicast_mark_router(br, port);
|
|
}
|
|
|
|
static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
|
|
igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
|
|
return -ENOMSG;
|
|
|
|
br_multicast_mark_router(br, port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_multicast_ipv4_rcv(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb,
|
|
u16 vid)
|
|
{
|
|
const unsigned char *src;
|
|
struct igmphdr *ih;
|
|
int err;
|
|
|
|
err = ip_mc_check_igmp(skb);
|
|
|
|
if (err == -ENOMSG) {
|
|
if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
|
|
BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
|
|
} else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
|
|
if (ip_hdr(skb)->protocol == IPPROTO_PIM)
|
|
br_multicast_pim(br, port, skb);
|
|
} else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
|
|
br_ip4_multicast_mrd_rcv(br, port, skb);
|
|
}
|
|
|
|
return 0;
|
|
} else if (err < 0) {
|
|
br_multicast_err_count(br, port, skb->protocol);
|
|
return err;
|
|
}
|
|
|
|
ih = igmp_hdr(skb);
|
|
src = eth_hdr(skb)->h_source;
|
|
BR_INPUT_SKB_CB(skb)->igmp = ih->type;
|
|
|
|
switch (ih->type) {
|
|
case IGMP_HOST_MEMBERSHIP_REPORT:
|
|
case IGMPV2_HOST_MEMBERSHIP_REPORT:
|
|
BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
|
|
err = br_ip4_multicast_add_group(br, port, ih->group, vid, src,
|
|
true);
|
|
break;
|
|
case IGMPV3_HOST_MEMBERSHIP_REPORT:
|
|
err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
|
|
break;
|
|
case IGMP_HOST_MEMBERSHIP_QUERY:
|
|
br_ip4_multicast_query(br, port, skb, vid);
|
|
break;
|
|
case IGMP_HOST_LEAVE_MESSAGE:
|
|
br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
|
|
break;
|
|
}
|
|
|
|
br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
|
|
BR_MCAST_DIR_RX);
|
|
|
|
return err;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static int br_ip6_multicast_mrd_rcv(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
|
|
if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
|
|
return -ENOMSG;
|
|
|
|
ret = ipv6_mc_check_icmpv6(skb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
|
|
return -ENOMSG;
|
|
|
|
br_multicast_mark_router(br, port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_multicast_ipv6_rcv(struct net_bridge *br,
|
|
struct net_bridge_port *port,
|
|
struct sk_buff *skb,
|
|
u16 vid)
|
|
{
|
|
const unsigned char *src;
|
|
struct mld_msg *mld;
|
|
int err;
|
|
|
|
err = ipv6_mc_check_mld(skb);
|
|
|
|
if (err == -ENOMSG) {
|
|
if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
|
|
BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
|
|
|
|
if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) {
|
|
err = br_ip6_multicast_mrd_rcv(br, port, skb);
|
|
|
|
if (err < 0 && err != -ENOMSG) {
|
|
br_multicast_err_count(br, port, skb->protocol);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
} else if (err < 0) {
|
|
br_multicast_err_count(br, port, skb->protocol);
|
|
return err;
|
|
}
|
|
|
|
mld = (struct mld_msg *)skb_transport_header(skb);
|
|
BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
|
|
|
|
switch (mld->mld_type) {
|
|
case ICMPV6_MGM_REPORT:
|
|
src = eth_hdr(skb)->h_source;
|
|
BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
|
|
err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
|
|
src, true);
|
|
break;
|
|
case ICMPV6_MLD2_REPORT:
|
|
err = br_ip6_multicast_mld2_report(br, port, skb, vid);
|
|
break;
|
|
case ICMPV6_MGM_QUERY:
|
|
err = br_ip6_multicast_query(br, port, skb, vid);
|
|
break;
|
|
case ICMPV6_MGM_REDUCTION:
|
|
src = eth_hdr(skb)->h_source;
|
|
br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
|
|
break;
|
|
}
|
|
|
|
br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
|
|
BR_MCAST_DIR_RX);
|
|
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
|
|
struct sk_buff *skb, u16 vid)
|
|
{
|
|
int ret = 0;
|
|
|
|
BR_INPUT_SKB_CB(skb)->igmp = 0;
|
|
BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
|
|
|
|
if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return 0;
|
|
|
|
switch (skb->protocol) {
|
|
case htons(ETH_P_IP):
|
|
ret = br_multicast_ipv4_rcv(br, port, skb, vid);
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6):
|
|
ret = br_multicast_ipv6_rcv(br, port, skb, vid);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void br_multicast_query_expired(struct net_bridge *br,
|
|
struct bridge_mcast_own_query *query,
|
|
struct bridge_mcast_querier *querier)
|
|
{
|
|
spin_lock(&br->multicast_lock);
|
|
if (query->startup_sent < br->multicast_startup_query_count)
|
|
query->startup_sent++;
|
|
|
|
RCU_INIT_POINTER(querier->port, NULL);
|
|
br_multicast_send_query(br, NULL, query);
|
|
spin_unlock(&br->multicast_lock);
|
|
}
|
|
|
|
static void br_ip4_multicast_query_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
|
|
|
|
br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void br_ip6_multicast_query_expired(struct timer_list *t)
|
|
{
|
|
struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
|
|
|
|
br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
|
|
}
|
|
#endif
|
|
|
|
static void br_multicast_gc_work(struct work_struct *work)
|
|
{
|
|
struct net_bridge *br = container_of(work, struct net_bridge,
|
|
mcast_gc_work);
|
|
HLIST_HEAD(deleted_head);
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
hlist_move_list(&br->mcast_gc_list, &deleted_head);
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
br_multicast_gc(&deleted_head);
|
|
}
|
|
|
|
void br_multicast_init(struct net_bridge *br)
|
|
{
|
|
br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
|
|
|
|
br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
|
|
br->multicast_last_member_count = 2;
|
|
br->multicast_startup_query_count = 2;
|
|
|
|
br->multicast_last_member_interval = HZ;
|
|
br->multicast_query_response_interval = 10 * HZ;
|
|
br->multicast_startup_query_interval = 125 * HZ / 4;
|
|
br->multicast_query_interval = 125 * HZ;
|
|
br->multicast_querier_interval = 255 * HZ;
|
|
br->multicast_membership_interval = 260 * HZ;
|
|
|
|
br->ip4_other_query.delay_time = 0;
|
|
br->ip4_querier.port = NULL;
|
|
br->multicast_igmp_version = 2;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
br->multicast_mld_version = 1;
|
|
br->ip6_other_query.delay_time = 0;
|
|
br->ip6_querier.port = NULL;
|
|
#endif
|
|
br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
|
|
br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
|
|
|
|
spin_lock_init(&br->multicast_lock);
|
|
timer_setup(&br->multicast_router_timer,
|
|
br_multicast_local_router_expired, 0);
|
|
timer_setup(&br->ip4_other_query.timer,
|
|
br_ip4_multicast_querier_expired, 0);
|
|
timer_setup(&br->ip4_own_query.timer,
|
|
br_ip4_multicast_query_expired, 0);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
timer_setup(&br->ip6_other_query.timer,
|
|
br_ip6_multicast_querier_expired, 0);
|
|
timer_setup(&br->ip6_own_query.timer,
|
|
br_ip6_multicast_query_expired, 0);
|
|
#endif
|
|
INIT_HLIST_HEAD(&br->mdb_list);
|
|
INIT_HLIST_HEAD(&br->mcast_gc_list);
|
|
INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
|
|
}
|
|
|
|
static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
|
|
{
|
|
struct in_device *in_dev = in_dev_get(br->dev);
|
|
|
|
if (!in_dev)
|
|
return;
|
|
|
|
__ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
|
|
in_dev_put(in_dev);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
|
|
{
|
|
struct in6_addr addr;
|
|
|
|
ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
|
|
ipv6_dev_mc_inc(br->dev, &addr);
|
|
}
|
|
#else
|
|
static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
void br_multicast_join_snoopers(struct net_bridge *br)
|
|
{
|
|
br_ip4_multicast_join_snoopers(br);
|
|
br_ip6_multicast_join_snoopers(br);
|
|
}
|
|
|
|
static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
|
|
{
|
|
struct in_device *in_dev = in_dev_get(br->dev);
|
|
|
|
if (WARN_ON(!in_dev))
|
|
return;
|
|
|
|
__ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
|
|
in_dev_put(in_dev);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
|
|
{
|
|
struct in6_addr addr;
|
|
|
|
ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
|
|
ipv6_dev_mc_dec(br->dev, &addr);
|
|
}
|
|
#else
|
|
static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
void br_multicast_leave_snoopers(struct net_bridge *br)
|
|
{
|
|
br_ip4_multicast_leave_snoopers(br);
|
|
br_ip6_multicast_leave_snoopers(br);
|
|
}
|
|
|
|
static void __br_multicast_open(struct net_bridge *br,
|
|
struct bridge_mcast_own_query *query)
|
|
{
|
|
query->startup_sent = 0;
|
|
|
|
if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return;
|
|
|
|
mod_timer(&query->timer, jiffies);
|
|
}
|
|
|
|
void br_multicast_open(struct net_bridge *br)
|
|
{
|
|
__br_multicast_open(br, &br->ip4_own_query);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
__br_multicast_open(br, &br->ip6_own_query);
|
|
#endif
|
|
}
|
|
|
|
void br_multicast_stop(struct net_bridge *br)
|
|
{
|
|
del_timer_sync(&br->multicast_router_timer);
|
|
del_timer_sync(&br->ip4_other_query.timer);
|
|
del_timer_sync(&br->ip4_own_query.timer);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
del_timer_sync(&br->ip6_other_query.timer);
|
|
del_timer_sync(&br->ip6_own_query.timer);
|
|
#endif
|
|
}
|
|
|
|
void br_multicast_dev_del(struct net_bridge *br)
|
|
{
|
|
struct net_bridge_mdb_entry *mp;
|
|
HLIST_HEAD(deleted_head);
|
|
struct hlist_node *tmp;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
|
|
br_multicast_del_mdb_entry(mp);
|
|
hlist_move_list(&br->mcast_gc_list, &deleted_head);
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
br_multicast_gc(&deleted_head);
|
|
cancel_work_sync(&br->mcast_gc_work);
|
|
|
|
rcu_barrier();
|
|
}
|
|
|
|
int br_multicast_set_router(struct net_bridge *br, unsigned long val)
|
|
{
|
|
int err = -EINVAL;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
|
|
switch (val) {
|
|
case MDB_RTR_TYPE_DISABLED:
|
|
case MDB_RTR_TYPE_PERM:
|
|
br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
|
|
del_timer(&br->multicast_router_timer);
|
|
br->multicast_router = val;
|
|
err = 0;
|
|
break;
|
|
case MDB_RTR_TYPE_TEMP_QUERY:
|
|
if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
|
|
br_mc_router_state_change(br, false);
|
|
br->multicast_router = val;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __del_port_router(struct net_bridge_port *p)
|
|
{
|
|
if (hlist_unhashed(&p->rlist))
|
|
return;
|
|
hlist_del_init_rcu(&p->rlist);
|
|
br_rtr_notify(p->br->dev, p, RTM_DELMDB);
|
|
br_port_mc_router_state_change(p, false);
|
|
|
|
/* don't allow timer refresh */
|
|
if (p->multicast_router == MDB_RTR_TYPE_TEMP)
|
|
p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
|
|
}
|
|
|
|
int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
|
|
{
|
|
struct net_bridge *br = p->br;
|
|
unsigned long now = jiffies;
|
|
int err = -EINVAL;
|
|
|
|
spin_lock(&br->multicast_lock);
|
|
if (p->multicast_router == val) {
|
|
/* Refresh the temp router port timer */
|
|
if (p->multicast_router == MDB_RTR_TYPE_TEMP)
|
|
mod_timer(&p->multicast_router_timer,
|
|
now + br->multicast_querier_interval);
|
|
err = 0;
|
|
goto unlock;
|
|
}
|
|
switch (val) {
|
|
case MDB_RTR_TYPE_DISABLED:
|
|
p->multicast_router = MDB_RTR_TYPE_DISABLED;
|
|
__del_port_router(p);
|
|
del_timer(&p->multicast_router_timer);
|
|
break;
|
|
case MDB_RTR_TYPE_TEMP_QUERY:
|
|
p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
|
|
__del_port_router(p);
|
|
break;
|
|
case MDB_RTR_TYPE_PERM:
|
|
p->multicast_router = MDB_RTR_TYPE_PERM;
|
|
del_timer(&p->multicast_router_timer);
|
|
br_multicast_add_router(br, p);
|
|
break;
|
|
case MDB_RTR_TYPE_TEMP:
|
|
p->multicast_router = MDB_RTR_TYPE_TEMP;
|
|
br_multicast_mark_router(br, p);
|
|
break;
|
|
default:
|
|
goto unlock;
|
|
}
|
|
err = 0;
|
|
unlock:
|
|
spin_unlock(&br->multicast_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void br_multicast_start_querier(struct net_bridge *br,
|
|
struct bridge_mcast_own_query *query)
|
|
{
|
|
struct net_bridge_port *port;
|
|
|
|
__br_multicast_open(br, query);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &br->port_list, list) {
|
|
if (port->state == BR_STATE_DISABLED ||
|
|
port->state == BR_STATE_BLOCKING)
|
|
continue;
|
|
|
|
if (query == &br->ip4_own_query)
|
|
br_multicast_enable(&port->ip4_own_query);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else
|
|
br_multicast_enable(&port->ip6_own_query);
|
|
#endif
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
int br_multicast_toggle(struct net_bridge *br, unsigned long val)
|
|
{
|
|
struct net_bridge_port *port;
|
|
bool change_snoopers = false;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
|
|
goto unlock;
|
|
|
|
br_mc_disabled_update(br->dev, val);
|
|
br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
|
|
if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
|
|
change_snoopers = true;
|
|
goto unlock;
|
|
}
|
|
|
|
if (!netif_running(br->dev))
|
|
goto unlock;
|
|
|
|
br_multicast_open(br);
|
|
list_for_each_entry(port, &br->port_list, list)
|
|
__br_multicast_enable_port(port);
|
|
|
|
change_snoopers = true;
|
|
|
|
unlock:
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
/* br_multicast_join_snoopers has the potential to cause
|
|
* an MLD Report/Leave to be delivered to br_multicast_rcv,
|
|
* which would in turn call br_multicast_add_group, which would
|
|
* attempt to acquire multicast_lock. This function should be
|
|
* called after the lock has been released to avoid deadlocks on
|
|
* multicast_lock.
|
|
*
|
|
* br_multicast_leave_snoopers does not have the problem since
|
|
* br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
|
|
* returns without calling br_multicast_ipv4/6_rcv if it's not
|
|
* enabled. Moved both functions out just for symmetry.
|
|
*/
|
|
if (change_snoopers) {
|
|
if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
br_multicast_join_snoopers(br);
|
|
else
|
|
br_multicast_leave_snoopers(br);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool br_multicast_enabled(const struct net_device *dev)
|
|
{
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
|
|
return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
|
|
}
|
|
EXPORT_SYMBOL_GPL(br_multicast_enabled);
|
|
|
|
bool br_multicast_router(const struct net_device *dev)
|
|
{
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
bool is_router;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
is_router = br_multicast_is_router(br);
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
return is_router;
|
|
}
|
|
EXPORT_SYMBOL_GPL(br_multicast_router);
|
|
|
|
int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
|
|
{
|
|
unsigned long max_delay;
|
|
|
|
val = !!val;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
|
|
goto unlock;
|
|
|
|
br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
|
|
if (!val)
|
|
goto unlock;
|
|
|
|
max_delay = br->multicast_query_response_interval;
|
|
|
|
if (!timer_pending(&br->ip4_other_query.timer))
|
|
br->ip4_other_query.delay_time = jiffies + max_delay;
|
|
|
|
br_multicast_start_querier(br, &br->ip4_own_query);
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
if (!timer_pending(&br->ip6_other_query.timer))
|
|
br->ip6_other_query.delay_time = jiffies + max_delay;
|
|
|
|
br_multicast_start_querier(br, &br->ip6_own_query);
|
|
#endif
|
|
|
|
unlock:
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
|
|
{
|
|
/* Currently we support only version 2 and 3 */
|
|
switch (val) {
|
|
case 2:
|
|
case 3:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
br->multicast_igmp_version = val;
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
|
|
{
|
|
/* Currently we support version 1 and 2 */
|
|
switch (val) {
|
|
case 1:
|
|
case 2:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
br->multicast_mld_version = val;
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* br_multicast_list_adjacent - Returns snooped multicast addresses
|
|
* @dev: The bridge port adjacent to which to retrieve addresses
|
|
* @br_ip_list: The list to store found, snooped multicast IP addresses in
|
|
*
|
|
* Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
|
|
* snooping feature on all bridge ports of dev's bridge device, excluding
|
|
* the addresses from dev itself.
|
|
*
|
|
* Returns the number of items added to br_ip_list.
|
|
*
|
|
* Notes:
|
|
* - br_ip_list needs to be initialized by caller
|
|
* - br_ip_list might contain duplicates in the end
|
|
* (needs to be taken care of by caller)
|
|
* - br_ip_list needs to be freed by caller
|
|
*/
|
|
int br_multicast_list_adjacent(struct net_device *dev,
|
|
struct list_head *br_ip_list)
|
|
{
|
|
struct net_bridge *br;
|
|
struct net_bridge_port *port;
|
|
struct net_bridge_port_group *group;
|
|
struct br_ip_list *entry;
|
|
int count = 0;
|
|
|
|
rcu_read_lock();
|
|
if (!br_ip_list || !netif_is_bridge_port(dev))
|
|
goto unlock;
|
|
|
|
port = br_port_get_rcu(dev);
|
|
if (!port || !port->br)
|
|
goto unlock;
|
|
|
|
br = port->br;
|
|
|
|
list_for_each_entry_rcu(port, &br->port_list, list) {
|
|
if (!port->dev || port->dev == dev)
|
|
continue;
|
|
|
|
hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
|
|
entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
|
|
if (!entry)
|
|
goto unlock;
|
|
|
|
entry->addr = group->key.addr;
|
|
list_add(&entry->list, br_ip_list);
|
|
count++;
|
|
}
|
|
}
|
|
|
|
unlock:
|
|
rcu_read_unlock();
|
|
return count;
|
|
}
|
|
EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
|
|
|
|
/**
|
|
* br_multicast_has_querier_anywhere - Checks for a querier on a bridge
|
|
* @dev: The bridge port providing the bridge on which to check for a querier
|
|
* @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
|
|
*
|
|
* Checks whether the given interface has a bridge on top and if so returns
|
|
* true if a valid querier exists anywhere on the bridged link layer.
|
|
* Otherwise returns false.
|
|
*/
|
|
bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
|
|
{
|
|
struct net_bridge *br;
|
|
struct net_bridge_port *port;
|
|
struct ethhdr eth;
|
|
bool ret = false;
|
|
|
|
rcu_read_lock();
|
|
if (!netif_is_bridge_port(dev))
|
|
goto unlock;
|
|
|
|
port = br_port_get_rcu(dev);
|
|
if (!port || !port->br)
|
|
goto unlock;
|
|
|
|
br = port->br;
|
|
|
|
memset(ð, 0, sizeof(eth));
|
|
eth.h_proto = htons(proto);
|
|
|
|
ret = br_multicast_querier_exists(br, ð, NULL);
|
|
|
|
unlock:
|
|
rcu_read_unlock();
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
|
|
|
|
/**
|
|
* br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
|
|
* @dev: The bridge port adjacent to which to check for a querier
|
|
* @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
|
|
*
|
|
* Checks whether the given interface has a bridge on top and if so returns
|
|
* true if a selected querier is behind one of the other ports of this
|
|
* bridge. Otherwise returns false.
|
|
*/
|
|
bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
|
|
{
|
|
struct net_bridge *br;
|
|
struct net_bridge_port *port;
|
|
bool ret = false;
|
|
|
|
rcu_read_lock();
|
|
if (!netif_is_bridge_port(dev))
|
|
goto unlock;
|
|
|
|
port = br_port_get_rcu(dev);
|
|
if (!port || !port->br)
|
|
goto unlock;
|
|
|
|
br = port->br;
|
|
|
|
switch (proto) {
|
|
case ETH_P_IP:
|
|
if (!timer_pending(&br->ip4_other_query.timer) ||
|
|
rcu_dereference(br->ip4_querier.port) == port)
|
|
goto unlock;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case ETH_P_IPV6:
|
|
if (!timer_pending(&br->ip6_other_query.timer) ||
|
|
rcu_dereference(br->ip6_querier.port) == port)
|
|
goto unlock;
|
|
break;
|
|
#endif
|
|
default:
|
|
goto unlock;
|
|
}
|
|
|
|
ret = true;
|
|
unlock:
|
|
rcu_read_unlock();
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
|
|
|
|
static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
|
|
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]++;
|
|
break;
|
|
case IGMPV2_HOST_MEMBERSHIP_REPORT:
|
|
pstats->mstats.igmp_v2reports[dir]++;
|
|
break;
|
|
case IGMPV3_HOST_MEMBERSHIP_REPORT:
|
|
pstats->mstats.igmp_v3reports[dir]++;
|
|
break;
|
|
case IGMP_HOST_MEMBERSHIP_QUERY:
|
|
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]++;
|
|
break;
|
|
}
|
|
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]++;
|
|
break;
|
|
case ICMPV6_MLD2_REPORT:
|
|
pstats->mstats.mld_v2reports[dir]++;
|
|
break;
|
|
case ICMPV6_MGM_QUERY:
|
|
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]++;
|
|
break;
|
|
}
|
|
break;
|
|
#endif /* CONFIG_IPV6 */
|
|
}
|
|
u64_stats_update_end(&pstats->syncp);
|
|
}
|
|
|
|
void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
|
|
const struct sk_buff *skb, u8 type, u8 dir)
|
|
{
|
|
struct bridge_mcast_stats __percpu *stats;
|
|
|
|
/* if multicast_disabled is true then igmp type can't be set */
|
|
if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
|
|
return;
|
|
|
|
if (p)
|
|
stats = p->mcast_stats;
|
|
else
|
|
stats = br->mcast_stats;
|
|
if (WARN_ON(!stats))
|
|
return;
|
|
|
|
br_mcast_stats_add(stats, skb, type, dir);
|
|
}
|
|
|
|
int br_multicast_init_stats(struct net_bridge *br)
|
|
{
|
|
br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
|
|
if (!br->mcast_stats)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void br_multicast_uninit_stats(struct net_bridge *br)
|
|
{
|
|
free_percpu(br->mcast_stats);
|
|
}
|
|
|
|
/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
|
|
static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
|
|
{
|
|
dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
|
|
dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
|
|
}
|
|
|
|
void br_multicast_get_stats(const struct net_bridge *br,
|
|
const struct net_bridge_port *p,
|
|
struct br_mcast_stats *dest)
|
|
{
|
|
struct bridge_mcast_stats __percpu *stats;
|
|
struct br_mcast_stats tdst;
|
|
int i;
|
|
|
|
memset(dest, 0, sizeof(*dest));
|
|
if (p)
|
|
stats = p->mcast_stats;
|
|
else
|
|
stats = br->mcast_stats;
|
|
if (WARN_ON(!stats))
|
|
return;
|
|
|
|
memset(&tdst, 0, sizeof(tdst));
|
|
for_each_possible_cpu(i) {
|
|
struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
|
|
struct br_mcast_stats temp;
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
|
|
memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
|
|
} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
|
|
|
|
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_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);
|
|
tdst.mld_parse_errors += temp.mld_parse_errors;
|
|
}
|
|
memcpy(dest, &tdst, sizeof(*dest));
|
|
}
|
|
|
|
int br_mdb_hash_init(struct net_bridge *br)
|
|
{
|
|
int err;
|
|
|
|
err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
|
|
if (err)
|
|
return err;
|
|
|
|
err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
|
|
if (err) {
|
|
rhashtable_destroy(&br->sg_port_tbl);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void br_mdb_hash_fini(struct net_bridge *br)
|
|
{
|
|
rhashtable_destroy(&br->sg_port_tbl);
|
|
rhashtable_destroy(&br->mdb_hash_tbl);
|
|
}
|