diff options
Diffstat (limited to 'net/bridge/br_multicast.c')
| -rw-r--r-- | net/bridge/br_multicast.c | 5119 |
1 files changed, 5119 insertions, 0 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c new file mode 100644 index 0000000000..96d1fc78dd --- /dev/null +++ b/net/bridge/br_multicast.c @@ -0,0 +1,5119 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Bridge multicast support. + * + * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> + */ + +#include <linux/err.h> +#include <linux/export.h> +#include <linux/if_ether.h> +#include <linux/igmp.h> +#include <linux/in.h> +#include <linux/jhash.h> +#include <linux/kernel.h> +#include <linux/log2.h> +#include <linux/netdevice.h> +#include <linux/netfilter_bridge.h> +#include <linux/random.h> +#include <linux/rculist.h> +#include <linux/skbuff.h> +#include <linux/slab.h> +#include <linux/timer.h> +#include <linux/inetdevice.h> +#include <linux/mroute.h> +#include <net/ip.h> +#include <net/switchdev.h> +#if IS_ENABLED(CONFIG_IPV6) +#include <linux/icmpv6.h> +#include <net/ipv6.h> +#include <net/mld.h> +#include <net/ip6_checksum.h> +#include <net/addrconf.h> +#endif +#include <trace/events/bridge.h> + +#include "br_private.h" +#include "br_private_mcast_eht.h" + +static const struct rhashtable_params br_mdb_rht_params = { + .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode), + .key_offset = offsetof(struct net_bridge_mdb_entry, addr), + .key_len = sizeof(struct br_ip), + .automatic_shrinking = true, +}; + +static const struct rhashtable_params br_sg_port_rht_params = { + .head_offset = offsetof(struct net_bridge_port_group, rhnode), + .key_offset = offsetof(struct net_bridge_port_group, key), + .key_len = sizeof(struct net_bridge_port_group_sg_key), + .automatic_shrinking = true, +}; + +static void br_multicast_start_querier(struct net_bridge_mcast *brmctx, + struct bridge_mcast_own_query *query); +static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx); +static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + __be32 group, + __u16 vid, + const unsigned char *src); +static void br_multicast_port_group_rexmit(struct timer_list *t); + +static void +br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted); +static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx); +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + const struct in6_addr *group, + __u16 vid, const unsigned char *src); +#endif +static struct net_bridge_port_group * +__br_multicast_add_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct br_ip *group, + const unsigned char *src, + u8 filter_mode, + bool igmpv2_mldv1, + bool blocked); +static void br_multicast_find_del_pg(struct net_bridge *br, + struct net_bridge_port_group *pg); +static void __br_multicast_stop(struct net_bridge_mcast *brmctx); + +static int br_mc_disabled_update(struct net_device *dev, bool value, + struct netlink_ext_ack *extack); + +static struct net_bridge_port_group * +br_sg_port_find(struct net_bridge *br, + struct net_bridge_port_group_sg_key *sg_p) +{ + lockdep_assert_held_once(&br->multicast_lock); + + return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p, + br_sg_port_rht_params); +} + +static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br, + struct br_ip *dst) +{ + return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); +} + +struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br, + struct br_ip *dst) +{ + struct net_bridge_mdb_entry *ent; + + lockdep_assert_held_once(&br->multicast_lock); + + rcu_read_lock(); + ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); + rcu_read_unlock(); + + return ent; +} + +static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br, + __be32 dst, __u16 vid) +{ + struct br_ip br_dst; + + memset(&br_dst, 0, sizeof(br_dst)); + br_dst.dst.ip4 = dst; + br_dst.proto = htons(ETH_P_IP); + br_dst.vid = vid; + + return br_mdb_ip_get(br, &br_dst); +} + +#if IS_ENABLED(CONFIG_IPV6) +static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br, + const struct in6_addr *dst, + __u16 vid) +{ + struct br_ip br_dst; + + memset(&br_dst, 0, sizeof(br_dst)); + br_dst.dst.ip6 = *dst; + br_dst.proto = htons(ETH_P_IPV6); + br_dst.vid = vid; + + return br_mdb_ip_get(br, &br_dst); +} +#endif + +struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, + struct sk_buff *skb, u16 vid) +{ + struct net_bridge *br = brmctx->br; + struct br_ip ip; + + if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || + br_multicast_ctx_vlan_global_disabled(brmctx)) + return NULL; + + if (BR_INPUT_SKB_CB(skb)->igmp) + return NULL; + + memset(&ip, 0, sizeof(ip)); + ip.proto = skb->protocol; + ip.vid = vid; + + switch (skb->protocol) { + case htons(ETH_P_IP): + ip.dst.ip4 = ip_hdr(skb)->daddr; + if (brmctx->multicast_igmp_version == 3) { + struct net_bridge_mdb_entry *mdb; + + ip.src.ip4 = ip_hdr(skb)->saddr; + mdb = br_mdb_ip_get_rcu(br, &ip); + if (mdb) + return mdb; + ip.src.ip4 = 0; + } + break; +#if IS_ENABLED(CONFIG_IPV6) + case htons(ETH_P_IPV6): + ip.dst.ip6 = ipv6_hdr(skb)->daddr; + if (brmctx->multicast_mld_version == 2) { + struct net_bridge_mdb_entry *mdb; + + ip.src.ip6 = ipv6_hdr(skb)->saddr; + mdb = br_mdb_ip_get_rcu(br, &ip); + if (mdb) + return mdb; + memset(&ip.src.ip6, 0, sizeof(ip.src.ip6)); + } + break; +#endif + default: + ip.proto = 0; + ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest); + } + + return br_mdb_ip_get_rcu(br, &ip); +} + +/* IMPORTANT: this function must be used only when the contexts cannot be + * passed down (e.g. timer) and must be used for read-only purposes because + * the vlan snooping option can change, so it can return any context + * (non-vlan or vlan). Its initial intended purpose is to read timer values + * from the *current* context based on the option. At worst that could lead + * to inconsistent timers when the contexts are changed, i.e. src timer + * which needs to re-arm with a specific delay taken from the old context + */ +static struct net_bridge_mcast_port * +br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg) +{ + struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx; + struct net_bridge_vlan *vlan; + + lockdep_assert_held_once(&pg->key.port->br->multicast_lock); + + /* if vlan snooping is disabled use the port's multicast context */ + if (!pg->key.addr.vid || + !br_opt_get(pg->key.port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) + goto out; + + /* locking is tricky here, due to different rules for multicast and + * vlans we need to take rcu to find the vlan and make sure it has + * the BR_VLFLAG_MCAST_ENABLED flag set, it can only change under + * multicast_lock which must be already held here, so the vlan's pmctx + * can safely be used on return + */ + rcu_read_lock(); + vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid); + if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx)) + pmctx = &vlan->port_mcast_ctx; + else + pmctx = NULL; + rcu_read_unlock(); +out: + return pmctx; +} + +static struct net_bridge_mcast_port * +br_multicast_port_vid_to_port_ctx(struct net_bridge_port *port, u16 vid) +{ + struct net_bridge_mcast_port *pmctx = NULL; + struct net_bridge_vlan *vlan; + + lockdep_assert_held_once(&port->br->multicast_lock); + + if (!br_opt_get(port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) + return NULL; + + /* Take RCU to access the vlan. */ + rcu_read_lock(); + + vlan = br_vlan_find(nbp_vlan_group_rcu(port), vid); + if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx)) + pmctx = &vlan->port_mcast_ctx; + + rcu_read_unlock(); + + return pmctx; +} + +/* when snooping we need to check if the contexts should be used + * in the following order: + * - if pmctx is non-NULL (port), check if it should be used + * - if pmctx is NULL (bridge), check if brmctx should be used + */ +static bool +br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx, + const struct net_bridge_mcast_port *pmctx) +{ + if (!netif_running(brmctx->br->dev)) + return false; + + if (pmctx) + return !br_multicast_port_ctx_state_disabled(pmctx); + else + return !br_multicast_ctx_vlan_disabled(brmctx); +} + +static bool br_port_group_equal(struct net_bridge_port_group *p, + struct net_bridge_port *port, + const unsigned char *src) +{ + if (p->key.port != port) + return false; + + if (!(port->flags & BR_MULTICAST_TO_UNICAST)) + return true; + + return ether_addr_equal(src, p->eth_addr); +} + +static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx, + struct net_bridge_port_group *pg, + struct br_ip *sg_ip) +{ + struct net_bridge_port_group_sg_key sg_key; + struct net_bridge_port_group *src_pg; + struct net_bridge_mcast *brmctx; + + memset(&sg_key, 0, sizeof(sg_key)); + brmctx = br_multicast_port_ctx_get_global(pmctx); + sg_key.port = pg->key.port; + sg_key.addr = *sg_ip; + if (br_sg_port_find(brmctx->br, &sg_key)) + return; + + src_pg = __br_multicast_add_group(brmctx, pmctx, + sg_ip, pg->eth_addr, + MCAST_INCLUDE, false, false); + if (IS_ERR_OR_NULL(src_pg) || + src_pg->rt_protocol != RTPROT_KERNEL) + return; + + src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL; +} + +static void __fwd_del_star_excl(struct net_bridge_port_group *pg, + struct br_ip *sg_ip) +{ + struct net_bridge_port_group_sg_key sg_key; + struct net_bridge *br = pg->key.port->br; + struct net_bridge_port_group *src_pg; + + memset(&sg_key, 0, sizeof(sg_key)); + sg_key.port = pg->key.port; + sg_key.addr = *sg_ip; + src_pg = br_sg_port_find(br, &sg_key); + if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) || + src_pg->rt_protocol != RTPROT_KERNEL) + return; + + br_multicast_find_del_pg(br, src_pg); +} + +/* When a port group transitions to (or is added as) EXCLUDE we need to add it + * to all other ports' S,G entries which are not blocked by the current group + * for proper replication, the assumption is that any S,G blocked entries + * are already added so the S,G,port lookup should skip them. + * When a port group transitions from EXCLUDE -> INCLUDE mode or is being + * deleted we need to remove it from all ports' S,G entries where it was + * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL). + */ +void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, + u8 filter_mode) +{ + struct net_bridge *br = pg->key.port->br; + struct net_bridge_port_group *pg_lst; + struct net_bridge_mcast_port *pmctx; + struct net_bridge_mdb_entry *mp; + struct br_ip sg_ip; + + if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr))) + return; + + mp = br_mdb_ip_get(br, &pg->key.addr); + if (!mp) + return; + pmctx = br_multicast_pg_to_port_ctx(pg); + if (!pmctx) + return; + + memset(&sg_ip, 0, sizeof(sg_ip)); + sg_ip = pg->key.addr; + + for (pg_lst = mlock_dereference(mp->ports, br); + pg_lst; + pg_lst = mlock_dereference(pg_lst->next, br)) { + struct net_bridge_group_src *src_ent; + + if (pg_lst == pg) + continue; + hlist_for_each_entry(src_ent, &pg_lst->src_list, node) { + if (!(src_ent->flags & BR_SGRP_F_INSTALLED)) + continue; + sg_ip.src = src_ent->addr.src; + switch (filter_mode) { + case MCAST_INCLUDE: + __fwd_del_star_excl(pg, &sg_ip); + break; + case MCAST_EXCLUDE: + __fwd_add_star_excl(pmctx, pg, &sg_ip); + break; + } + } + } +} + +/* called when adding a new S,G with host_joined == false by default */ +static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp, + struct net_bridge_port_group *sg) +{ + struct net_bridge_mdb_entry *sg_mp; + + if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) + return; + if (!star_mp->host_joined) + return; + + sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr); + if (!sg_mp) + return; + sg_mp->host_joined = true; +} + +/* set the host_joined state of all of *,G's S,G entries */ +static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp) +{ + struct net_bridge *br = star_mp->br; + struct net_bridge_mdb_entry *sg_mp; + struct net_bridge_port_group *pg; + struct br_ip sg_ip; + + if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) + return; + + memset(&sg_ip, 0, sizeof(sg_ip)); + sg_ip = star_mp->addr; + for (pg = mlock_dereference(star_mp->ports, br); + pg; + pg = mlock_dereference(pg->next, br)) { + struct net_bridge_group_src *src_ent; + + hlist_for_each_entry(src_ent, &pg->src_list, node) { + if (!(src_ent->flags & BR_SGRP_F_INSTALLED)) + continue; + sg_ip.src = src_ent->addr.src; + sg_mp = br_mdb_ip_get(br, &sg_ip); + if (!sg_mp) + continue; + sg_mp->host_joined = star_mp->host_joined; + } + } +} + +static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp) +{ + struct net_bridge_port_group __rcu **pp; + struct net_bridge_port_group *p; + + /* *,G exclude ports are only added to S,G entries */ + if (WARN_ON(br_multicast_is_star_g(&sgmp->addr))) + return; + + /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports + * we should ignore perm entries since they're managed by user-space + */ + for (pp = &sgmp->ports; + (p = mlock_dereference(*pp, sgmp->br)) != NULL; + pp = &p->next) + if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL | + MDB_PG_FLAGS_PERMANENT))) + return; + + /* currently the host can only have joined the *,G which means + * we treat it as EXCLUDE {}, so for an S,G it's considered a + * STAR_EXCLUDE entry and we can safely leave it + */ + sgmp->host_joined = false; + + for (pp = &sgmp->ports; + (p = mlock_dereference(*pp, sgmp->br)) != NULL;) { + if (!(p->flags & MDB_PG_FLAGS_PERMANENT)) + br_multicast_del_pg(sgmp, p, pp); + else + pp = &p->next; + } +} + +void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, + struct net_bridge_port_group *sg) +{ + struct net_bridge_port_group_sg_key sg_key; + struct net_bridge *br = star_mp->br; + struct net_bridge_mcast_port *pmctx; + struct net_bridge_port_group *pg; + struct net_bridge_mcast *brmctx; + + if (WARN_ON(br_multicast_is_star_g(&sg->key.addr))) + return; + if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) + return; + + br_multicast_sg_host_state(star_mp, sg); + memset(&sg_key, 0, sizeof(sg_key)); + sg_key.addr = sg->key.addr; + /* we need to add all exclude ports to the S,G */ + for (pg = mlock_dereference(star_mp->ports, br); + pg; + pg = mlock_dereference(pg->next, br)) { + struct net_bridge_port_group *src_pg; + + if (pg == sg || pg->filter_mode == MCAST_INCLUDE) + continue; + + sg_key.port = pg->key.port; + if (br_sg_port_find(br, &sg_key)) + continue; + + pmctx = br_multicast_pg_to_port_ctx(pg); + if (!pmctx) + continue; + brmctx = br_multicast_port_ctx_get_global(pmctx); + + src_pg = __br_multicast_add_group(brmctx, pmctx, + &sg->key.addr, + sg->eth_addr, + MCAST_INCLUDE, false, false); + if (IS_ERR_OR_NULL(src_pg) || + src_pg->rt_protocol != RTPROT_KERNEL) + continue; + src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL; + } +} + +static void br_multicast_fwd_src_add(struct net_bridge_group_src *src) +{ + struct net_bridge_mdb_entry *star_mp; + struct net_bridge_mcast_port *pmctx; + struct net_bridge_port_group *sg; + struct net_bridge_mcast *brmctx; + struct br_ip sg_ip; + + if (src->flags & BR_SGRP_F_INSTALLED) + return; + + memset(&sg_ip, 0, sizeof(sg_ip)); + pmctx = br_multicast_pg_to_port_ctx(src->pg); + if (!pmctx) + return; + brmctx = br_multicast_port_ctx_get_global(pmctx); + sg_ip = src->pg->key.addr; + sg_ip.src = src->addr.src; + + sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip, + src->pg->eth_addr, MCAST_INCLUDE, false, + !timer_pending(&src->timer)); + if (IS_ERR_OR_NULL(sg)) + return; + src->flags |= BR_SGRP_F_INSTALLED; + sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL; + + /* if it was added by user-space as perm we can skip next steps */ + if (sg->rt_protocol != RTPROT_KERNEL && + (sg->flags & MDB_PG_FLAGS_PERMANENT)) + return; + + /* the kernel is now responsible for removing this S,G */ + del_timer(&sg->timer); + star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr); + if (!star_mp) + return; + + br_multicast_sg_add_exclude_ports(star_mp, sg); +} + +static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src, + bool fastleave) +{ + struct net_bridge_port_group *p, *pg = src->pg; + struct net_bridge_port_group __rcu **pp; + struct net_bridge_mdb_entry *mp; + struct br_ip sg_ip; + + memset(&sg_ip, 0, sizeof(sg_ip)); + sg_ip = pg->key.addr; + sg_ip.src = src->addr.src; + + mp = br_mdb_ip_get(src->br, &sg_ip); + if (!mp) + return; + + 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) && + !(src->flags & BR_SGRP_F_USER_ADDED)) + 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); + + timer_shutdown_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)); + + timer_shutdown_sync(&src->timer); + kfree_rcu(src, rcu); +} + +void __br_multicast_del_group_src(struct net_bridge_group_src *src) +{ + struct net_bridge *br = src->pg->key.port->br; + + 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); +} + +void br_multicast_del_group_src(struct net_bridge_group_src *src, + bool fastleave) +{ + br_multicast_fwd_src_remove(src, fastleave); + __br_multicast_del_group_src(src); +} + +static int +br_multicast_port_ngroups_inc_one(struct net_bridge_mcast_port *pmctx, + struct netlink_ext_ack *extack, + const char *what) +{ + u32 max = READ_ONCE(pmctx->mdb_max_entries); + u32 n = READ_ONCE(pmctx->mdb_n_entries); + + if (max && n >= max) { + NL_SET_ERR_MSG_FMT_MOD(extack, "%s is already in %u groups, and mcast_max_groups=%u", + what, n, max); + return -E2BIG; + } + + WRITE_ONCE(pmctx->mdb_n_entries, n + 1); + return 0; +} + +static void br_multicast_port_ngroups_dec_one(struct net_bridge_mcast_port *pmctx) +{ + u32 n = READ_ONCE(pmctx->mdb_n_entries); + + WARN_ON_ONCE(n == 0); + WRITE_ONCE(pmctx->mdb_n_entries, n - 1); +} + +static int br_multicast_port_ngroups_inc(struct net_bridge_port *port, + const struct br_ip *group, + struct netlink_ext_ack *extack) +{ + struct net_bridge_mcast_port *pmctx; + int err; + + lockdep_assert_held_once(&port->br->multicast_lock); + + /* Always count on the port context. */ + err = br_multicast_port_ngroups_inc_one(&port->multicast_ctx, extack, + "Port"); + if (err) { + trace_br_mdb_full(port->dev, group); + return err; + } + + /* Only count on the VLAN context if VID is given, and if snooping on + * that VLAN is enabled. + */ + if (!group->vid) + return 0; + + pmctx = br_multicast_port_vid_to_port_ctx(port, group->vid); + if (!pmctx) + return 0; + + err = br_multicast_port_ngroups_inc_one(pmctx, extack, "Port-VLAN"); + if (err) { + trace_br_mdb_full(port->dev, group); + goto dec_one_out; + } + + return 0; + +dec_one_out: + br_multicast_port_ngroups_dec_one(&port->multicast_ctx); + return err; +} + +static void br_multicast_port_ngroups_dec(struct net_bridge_port *port, u16 vid) +{ + struct net_bridge_mcast_port *pmctx; + + lockdep_assert_held_once(&port->br->multicast_lock); + + if (vid) { + pmctx = br_multicast_port_vid_to_port_ctx(port, vid); + if (pmctx) + br_multicast_port_ngroups_dec_one(pmctx); + } + br_multicast_port_ngroups_dec_one(&port->multicast_ctx); +} + +u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx) +{ + return READ_ONCE(pmctx->mdb_n_entries); +} + +void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max) +{ + WRITE_ONCE(pmctx->mdb_max_entries, max); +} + +u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx) +{ + return READ_ONCE(pmctx->mdb_max_entries); +} + +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)); + + timer_shutdown_sync(&pg->rexmit_timer); + timer_shutdown_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); + } + br_multicast_port_ngroups_dec(pg->key.port, pg->key.addr.vid); + 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 void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb) +{ + struct net_bridge_vlan *vlan = NULL; + + if (pmctx && br_multicast_port_ctx_is_vlan(pmctx)) + vlan = pmctx->vlan; + else if (br_multicast_ctx_is_vlan(brmctx)) + vlan = brmctx->vlan; + + if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) { + u16 vlan_proto; + + if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0) + return; + __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid); + } +} + +static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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 (brmctx->multicast_igmp_version == 3) { + igmp_hdr_size = sizeof(*ihv3); + if (pg && with_srcs) { + lmqt = now + (brmctx->multicast_last_member_interval * + brmctx->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 > brmctx->br->dev->mtu) + return NULL; + + skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size); + if (!skb) + goto out; + + __br_multicast_query_handle_vlan(brmctx, pmctx, skb); + skb->protocol = htons(ETH_P_IP); + + skb_reset_mac_header(skb); + eth = eth_hdr(skb); + + ether_addr_copy(eth->h_source, brmctx->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(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? + inet_select_addr(brmctx->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 (brmctx->multicast_igmp_version) { + case 2: + ih = igmp_hdr(skb); + ih->type = IGMP_HOST_MEMBERSHIP_QUERY; + ih->code = (group ? brmctx->multicast_last_member_interval : + brmctx->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 ? brmctx->multicast_last_member_interval : + brmctx->multicast_query_response_interval) / + (HZ / IGMP_TIMER_SCALE); + ihv3->group = group; + ihv3->qqic = brmctx->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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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 (brmctx->multicast_mld_version == 2) { + mld_hdr_size = sizeof(*mld2q); + if (pg && with_srcs) { + llqt = now + (brmctx->multicast_last_member_interval * + brmctx->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 > brmctx->br->dev->mtu) + return NULL; + + skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size); + if (!skb) + goto out; + + __br_multicast_query_handle_vlan(brmctx, pmctx, skb); + skb->protocol = htons(ETH_P_IPV6); + + /* Ethernet header */ + skb_reset_mac_header(skb); + eth = eth_hdr(skb); + + ether_addr_copy(eth->h_source, brmctx->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(brmctx->br->dev), brmctx->br->dev, + &ip6h->daddr, 0, &ip6h->saddr)) { + kfree_skb(skb); + br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false); + return NULL; + } + + br_opt_toggle(brmctx->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) ? + brmctx->multicast_query_response_interval : + brmctx->multicast_last_member_interval; + *igmp_type = ICMPV6_MGM_QUERY; + switch (brmctx->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 = brmctx->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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pmctx, 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(brmctx, pmctx, 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) { + trace_br_mdb_full(br->dev, group); + br_mc_disabled_update(br->dev, false, NULL); + 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; +} + +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, + const 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 netlink_ext_ack *extack) +{ + struct net_bridge_port_group *p; + int err; + + err = br_multicast_port_ngroups_inc(port, group, extack); + if (err) + return NULL; + + p = kzalloc(sizeof(*p), GFP_ATOMIC); + if (unlikely(!p)) { + NL_SET_ERR_MSG_MOD(extack, "Couldn't allocate new port group"); + goto dec_out; + } + + 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)) { + NL_SET_ERR_MSG_MOD(extack, "Couldn't insert new port group"); + goto free_out; + } + + 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; + +free_out: + kfree(p); +dec_out: + br_multicast_port_ngroups_dec(port, group->vid); + return NULL; +} + +void br_multicast_del_port_group(struct net_bridge_port_group *p) +{ + struct net_bridge_port *port = p->key.port; + __u16 vid = p->key.addr.vid; + + hlist_del_init(&p->mglist); + if (!br_multicast_is_star_g(&p->key.addr)) + rhashtable_remove_fast(&port->br->sg_port_tbl, &p->rhnode, + br_sg_port_rht_params); + kfree(p); + br_multicast_port_ngroups_dec(port, vid); +} + +void br_multicast_host_join(const struct net_bridge_mcast *brmctx, + 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 + brmctx->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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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 (!br_multicast_ctx_should_use(brmctx, pmctx)) + goto out; + + mp = br_multicast_new_group(brmctx->br, group); + if (IS_ERR(mp)) + return ERR_CAST(mp); + + if (!pmctx) { + br_multicast_host_join(brmctx, mp, true); + goto out; + } + + for (pp = &mp->ports; + (p = mlock_dereference(*pp, brmctx->br)) != NULL; + pp = &p->next) { + if (br_port_group_equal(p, pmctx->port, src)) + goto found; + if ((unsigned long)p->key.port < (unsigned long)pmctx->port) + break; + } + + p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src, + filter_mode, RTPROT_KERNEL, NULL); + 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(brmctx->br->dev, mp, p, RTM_NEWMDB); + +found: + if (igmpv2_mldv1) + mod_timer(&p->timer, + now + brmctx->multicast_membership_interval); + +out: + return p; +} + +static int br_multicast_add_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct br_ip *group, + const unsigned char *src, + u8 filter_mode, + bool igmpv2_mldv1) +{ + struct net_bridge_port_group *pg; + int err; + + spin_lock(&brmctx->br->multicast_lock); + pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode, + igmpv2_mldv1, false); + /* NULL is considered valid for host joined groups */ + err = PTR_ERR_OR_ZERO(pg); + spin_unlock(&brmctx->br->multicast_lock); + + return err; +} + +static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + __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(brmctx, pmctx, &br_group, src, + filter_mode, igmpv2); +} + +#if IS_ENABLED(CONFIG_IPV6) +static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pmctx, &br_group, src, + filter_mode, mldv1); +} +#endif + +static bool br_multicast_rport_del(struct hlist_node *rlist) +{ + if (hlist_unhashed(rlist)) + return false; + + hlist_del_init_rcu(rlist); + return true; +} + +static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx) +{ + return br_multicast_rport_del(&pmctx->ip4_rlist); +} + +static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx) +{ +#if IS_ENABLED(CONFIG_IPV6) + return br_multicast_rport_del(&pmctx->ip6_rlist); +#else + return false; +#endif +} + +static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx, + struct timer_list *t, + struct hlist_node *rlist) +{ + struct net_bridge *br = pmctx->port->br; + bool del; + + spin_lock(&br->multicast_lock); + if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED || + pmctx->multicast_router == MDB_RTR_TYPE_PERM || + timer_pending(t)) + goto out; + + del = br_multicast_rport_del(rlist); + br_multicast_rport_del_notify(pmctx, del); +out: + spin_unlock(&br->multicast_lock); +} + +static void br_ip4_multicast_router_expired(struct timer_list *t) +{ + struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, + ip4_mc_router_timer); + + br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_router_expired(struct timer_list *t) +{ + struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, + ip6_mc_router_timer); + + br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist); +} +#endif + +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 net_bridge_mcast *brmctx, + struct timer_list *timer) +{ + spin_lock(&brmctx->br->multicast_lock); + if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED || + brmctx->multicast_router == MDB_RTR_TYPE_PERM || + br_ip4_multicast_is_router(brmctx) || + br_ip6_multicast_is_router(brmctx)) + goto out; + + br_mc_router_state_change(brmctx->br, false); +out: + spin_unlock(&brmctx->br->multicast_lock); +} + +static void br_ip4_multicast_local_router_expired(struct timer_list *t) +{ + struct net_bridge_mcast *brmctx = from_timer(brmctx, t, + ip4_mc_router_timer); + + br_multicast_local_router_expired(brmctx, t); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_local_router_expired(struct timer_list *t) +{ + struct net_bridge_mcast *brmctx = from_timer(brmctx, t, + ip6_mc_router_timer); + + br_multicast_local_router_expired(brmctx, t); +} +#endif + +static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx, + struct bridge_mcast_own_query *query) +{ + spin_lock(&brmctx->br->multicast_lock); + if (!netif_running(brmctx->br->dev) || + br_multicast_ctx_vlan_global_disabled(brmctx) || + !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) + goto out; + + br_multicast_start_querier(brmctx, query); + +out: + spin_unlock(&brmctx->br->multicast_lock); +} + +static void br_ip4_multicast_querier_expired(struct timer_list *t) +{ + struct net_bridge_mcast *brmctx = from_timer(brmctx, t, + ip4_other_query.timer); + + br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_querier_expired(struct timer_list *t) +{ + struct net_bridge_mcast *brmctx = from_timer(brmctx, t, + ip6_other_query.timer); + + br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query); +} +#endif + +static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx, + struct br_ip *ip, + struct sk_buff *skb) +{ + if (ip->proto == htons(ETH_P_IP)) + brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr; +#if IS_ENABLED(CONFIG_IPV6) + else + brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr; +#endif +} + +static void __br_multicast_send_query(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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; + + if (!br_multicast_ctx_should_use(brmctx, pmctx) || + !br_multicast_ctx_matches_vlan_snooping(brmctx)) + return; + +again_under_lmqt: + skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group, + with_srcs, over_lmqt, sflag, &igmp_type, + need_rexmit); + if (!skb) + return; + + if (pmctx) { + skb->dev = pmctx->port->dev; + br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type, + BR_MCAST_DIR_TX); + NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, + dev_net(pmctx->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(brmctx, group, skb); + br_multicast_count(brmctx->br, NULL, skb, igmp_type, + BR_MCAST_DIR_RX); + netif_rx(skb); + } +} + +static void br_multicast_read_querier(const struct bridge_mcast_querier *querier, + struct bridge_mcast_querier *dest) +{ + unsigned int seq; + + memset(dest, 0, sizeof(*dest)); + do { + seq = read_seqcount_begin(&querier->seq); + dest->port_ifidx = querier->port_ifidx; + memcpy(&dest->addr, &querier->addr, sizeof(struct br_ip)); + } while (read_seqcount_retry(&querier->seq, seq)); +} + +static void br_multicast_update_querier(struct net_bridge_mcast *brmctx, + struct bridge_mcast_querier *querier, + int ifindex, + struct br_ip *saddr) +{ + write_seqcount_begin(&querier->seq); + querier->port_ifidx = ifindex; + memcpy(&querier->addr, saddr, sizeof(*saddr)); + write_seqcount_end(&querier->seq); +} + +static void br_multicast_send_query(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct bridge_mcast_own_query *own_query) +{ + struct bridge_mcast_other_query *other_query = NULL; + struct bridge_mcast_querier *querier; + struct br_ip br_group; + unsigned long time; + + if (!br_multicast_ctx_should_use(brmctx, pmctx) || + !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) || + !brmctx->multicast_querier) + return; + + memset(&br_group.dst, 0, sizeof(br_group.dst)); + + if (pmctx ? (own_query == &pmctx->ip4_own_query) : + (own_query == &brmctx->ip4_own_query)) { + querier = &brmctx->ip4_querier; + other_query = &brmctx->ip4_other_query; + br_group.proto = htons(ETH_P_IP); +#if IS_ENABLED(CONFIG_IPV6) + } else { + querier = &brmctx->ip6_querier; + other_query = &brmctx->ip6_other_query; + br_group.proto = htons(ETH_P_IPV6); +#endif + } + + if (!other_query || timer_pending(&other_query->timer)) + return; + + /* we're about to select ourselves as querier */ + if (!pmctx && querier->port_ifidx) { + struct br_ip zeroip = {}; + + br_multicast_update_querier(brmctx, querier, 0, &zeroip); + } + + __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false, + 0, NULL); + + time = jiffies; + time += own_query->startup_sent < brmctx->multicast_startup_query_count ? + brmctx->multicast_startup_query_interval : + brmctx->multicast_query_interval; + mod_timer(&own_query->timer, time); +} + +static void +br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx, + struct bridge_mcast_own_query *query) +{ + struct net_bridge *br = pmctx->port->br; + struct net_bridge_mcast *brmctx; + + spin_lock(&br->multicast_lock); + if (br_multicast_port_ctx_state_stopped(pmctx)) + goto out; + + brmctx = br_multicast_port_ctx_get_global(pmctx); + if (query->startup_sent < brmctx->multicast_startup_query_count) + query->startup_sent++; + + br_multicast_send_query(brmctx, pmctx, query); + +out: + spin_unlock(&br->multicast_lock); +} + +static void br_ip4_multicast_port_query_expired(struct timer_list *t) +{ + struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, + ip4_own_query.timer); + + br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_port_query_expired(struct timer_list *t) +{ + struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, + ip6_own_query.timer); + + br_multicast_port_query_expired(pmctx, &pmctx->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; + struct net_bridge_mcast_port *pmctx; + struct net_bridge_mcast *brmctx; + 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)) + goto out; + + pmctx = br_multicast_pg_to_port_ctx(pg); + if (!pmctx) + goto out; + brmctx = br_multicast_port_ctx_get_global(pmctx); + if (!brmctx->multicast_querier) + goto out; + + if (pg->key.addr.proto == htons(ETH_P_IP)) + other_query = &brmctx->ip4_other_query; +#if IS_ENABLED(CONFIG_IPV6) + else + other_query = &brmctx->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(brmctx, pmctx, pg, &pg->key.addr, + &pg->key.addr, false, 1, NULL); + } + __br_multicast_send_query(brmctx, pmctx, 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 + + brmctx->multicast_last_member_interval); +out: + spin_unlock(&br->multicast_lock); +} + +static int br_mc_disabled_update(struct net_device *dev, bool value, + struct netlink_ext_ack *extack) +{ + struct switchdev_attr attr = { + .orig_dev = dev, + .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, + .flags = SWITCHDEV_F_DEFER, + .u.mc_disabled = !value, + }; + + return switchdev_port_attr_set(dev, &attr, extack); +} + +void br_multicast_port_ctx_init(struct net_bridge_port *port, + struct net_bridge_vlan *vlan, + struct net_bridge_mcast_port *pmctx) +{ + pmctx->port = port; + pmctx->vlan = vlan; + pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; + timer_setup(&pmctx->ip4_mc_router_timer, + br_ip4_multicast_router_expired, 0); + timer_setup(&pmctx->ip4_own_query.timer, + br_ip4_multicast_port_query_expired, 0); +#if IS_ENABLED(CONFIG_IPV6) + timer_setup(&pmctx->ip6_mc_router_timer, + br_ip6_multicast_router_expired, 0); + timer_setup(&pmctx->ip6_own_query.timer, + br_ip6_multicast_port_query_expired, 0); +#endif +} + +void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) +{ +#if IS_ENABLED(CONFIG_IPV6) + del_timer_sync(&pmctx->ip6_mc_router_timer); +#endif + del_timer_sync(&pmctx->ip4_mc_router_timer); +} + +int br_multicast_add_port(struct net_bridge_port *port) +{ + int err; + + port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT; + br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx); + + err = br_mc_disabled_update(port->dev, + br_opt_get(port->br, + BROPT_MULTICAST_ENABLED), + NULL); + if (err && err != -EOPNOTSUPP) + return err; + + 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); + br_multicast_port_ctx_deinit(&port->multicast_ctx); + 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_ctx(struct net_bridge_mcast_port *pmctx) +{ + struct net_bridge *br = pmctx->port->br; + struct net_bridge_mcast *brmctx; + + brmctx = br_multicast_port_ctx_get_global(pmctx); + if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || + !netif_running(br->dev)) + return; + + br_multicast_enable(&pmctx->ip4_own_query); +#if IS_ENABLED(CONFIG_IPV6) + br_multicast_enable(&pmctx->ip6_own_query); +#endif + if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) { + br_ip4_multicast_add_router(brmctx, pmctx); + br_ip6_multicast_add_router(brmctx, pmctx); + } + + if (br_multicast_port_ctx_is_vlan(pmctx)) { + struct net_bridge_port_group *pg; + u32 n = 0; + + /* The mcast_n_groups counter might be wrong. First, + * BR_VLFLAG_MCAST_ENABLED is toggled before temporary entries + * are flushed, thus mcast_n_groups after the toggle does not + * reflect the true values. And second, permanent entries added + * while BR_VLFLAG_MCAST_ENABLED was disabled, are not reflected + * either. Thus we have to refresh the counter. + */ + + hlist_for_each_entry(pg, &pmctx->port->mglist, mglist) { + if (pg->key.addr.vid == pmctx->vlan->vid) + n++; + } + WRITE_ONCE(pmctx->mdb_n_entries, n); + } +} + +void br_multicast_enable_port(struct net_bridge_port *port) +{ + struct net_bridge *br = port->br; + + spin_lock_bh(&br->multicast_lock); + __br_multicast_enable_port_ctx(&port->multicast_ctx); + spin_unlock_bh(&br->multicast_lock); +} + +static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx) +{ + struct net_bridge_port_group *pg; + struct hlist_node *n; + bool del = false; + + hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist) + if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) && + (!br_multicast_port_ctx_is_vlan(pmctx) || + pg->key.addr.vid == pmctx->vlan->vid)) + br_multicast_find_del_pg(pmctx->port->br, pg); + + del |= br_ip4_multicast_rport_del(pmctx); + del_timer(&pmctx->ip4_mc_router_timer); + del_timer(&pmctx->ip4_own_query.timer); + del |= br_ip6_multicast_rport_del(pmctx); +#if IS_ENABLED(CONFIG_IPV6) + del_timer(&pmctx->ip6_mc_router_timer); + del_timer(&pmctx->ip6_own_query.timer); +#endif + br_multicast_rport_del_notify(pmctx, del); +} + +void br_multicast_disable_port(struct net_bridge_port *port) +{ + spin_lock_bh(&port->br->multicast_lock); + __br_multicast_disable_port_ctx(&port->multicast_ctx); + spin_unlock_bh(&port->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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct net_bridge_port_group *pg) +{ + struct bridge_mcast_other_query *other_query = NULL; + u32 lmqc = brmctx->multicast_last_member_count; + unsigned long lmqt, lmi, now = jiffies; + struct net_bridge_group_src *ent; + + if (!netif_running(brmctx->br->dev) || + !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) + return; + + if (pg->key.addr.proto == htons(ETH_P_IP)) + other_query = &brmctx->ip4_other_query; +#if IS_ENABLED(CONFIG_IPV6) + else + other_query = &brmctx->ip6_other_query; +#endif + + lmqt = now + br_multicast_lmqt(brmctx); + 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 (brmctx->multicast_querier && + other_query && + !timer_pending(&other_query->timer)) + ent->src_query_rexmit_cnt = lmqc; + __grp_src_mod_timer(ent, lmqt); + } + } + } + + if (!brmctx->multicast_querier || + !other_query || timer_pending(&other_query->timer)) + return; + + __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr, + &pg->key.addr, true, 1, NULL); + + lmi = now + brmctx->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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct net_bridge_port_group *pg) +{ + struct bridge_mcast_other_query *other_query = NULL; + unsigned long now = jiffies, lmi; + + if (!netif_running(brmctx->br->dev) || + !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) + return; + + if (pg->key.addr.proto == htons(ETH_P_IP)) + other_query = &brmctx->ip4_other_query; +#if IS_ENABLED(CONFIG_IPV6) + else + other_query = &brmctx->ip6_other_query; +#endif + + if (brmctx->multicast_querier && + other_query && !timer_pending(&other_query->timer)) { + lmi = now + brmctx->multicast_last_member_interval; + pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1; + __br_multicast_send_query(brmctx, pmctx, 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(brmctx)))) + mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx)); +} + +/* 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(const struct net_bridge_mcast *brmctx, + 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; + 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(brmctx)); + } + + if (br_multicast_eht_handle(brmctx, 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(const struct net_bridge_mcast *brmctx, + 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(brmctx, 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(const struct net_bridge_mcast *brmctx, + 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; + 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(brmctx)); + changed = true; + } + } + } + + if (br_multicast_eht_handle(brmctx, 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(const struct net_bridge_mcast *brmctx, + 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: + __grp_src_isexc_incl(brmctx, 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(brmctx, pg, h_addr, srcs, nsrcs, + addr_size, grec_type); + break; + } + + pg->filter_mode = MCAST_EXCLUDE; + mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx)); + + 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct net_bridge_port_group *pg, void *h_addr, + void *srcs, u32 nsrcs, size_t addr_size, + int grec_type) +{ + 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(brmctx)); + } + + if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, + grec_type)) + changed = true; + + if (to_send) + __grp_src_query_marked_and_rexmit(brmctx, pmctx, 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct net_bridge_port_group *pg, void *h_addr, + void *srcs, u32 nsrcs, size_t addr_size, + int grec_type) +{ + 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(brmctx)); + } + + if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, + grec_type)) + changed = true; + + if (to_send) + __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); + + __grp_send_query_and_rexmit(brmctx, pmctx, pg); + + return changed; +} + +static bool br_multicast_toin(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pmctx, pg, h_addr, srcs, + nsrcs, addr_size, grec_type); + break; + case MCAST_EXCLUDE: + changed = __grp_src_toin_excl(brmctx, pmctx, 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pg, h_addr, srcs, nsrcs, addr_size, + grec_type); + + __grp_src_delete_marked(pg); + if (to_send) + __grp_src_query_marked_and_rexmit(brmctx, pmctx, 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, 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(brmctx, pmctx, pg); + + return changed; +} + +static bool br_multicast_toex(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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: + __grp_src_toex_incl(brmctx, pmctx, 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(brmctx, pmctx, pg, h_addr, srcs, + nsrcs, addr_size, grec_type); + break; + } + + pg->filter_mode = MCAST_EXCLUDE; + mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx)); + + 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pg, h_addr, srcs, nsrcs, addr_size, + grec_type)) + changed = true; + + if (to_send) + __grp_src_query_marked_and_rexmit(brmctx, pmctx, 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pg, h_addr, srcs, nsrcs, addr_size, + grec_type)) + changed = true; + + if (to_send) + __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); + + return changed; +} + +static bool br_multicast_block(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(brmctx, pmctx, pg, h_addr, srcs, + nsrcs, addr_size, grec_type); + break; + case MCAST_EXCLUDE: + changed = __grp_src_block_excl(brmctx, pmctx, 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb, + u16 vid) +{ + bool igmpv2 = brmctx->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 (!pmctx || igmpv2) { + br_ip4_multicast_leave_group(brmctx, pmctx, + group, vid, src); + continue; + } + } else { + err = br_ip4_multicast_add_group(brmctx, pmctx, group, + vid, src, igmpv2); + if (err) + break; + } + + if (!pmctx || igmpv2) + continue; + + spin_lock(&brmctx->br->multicast_lock); + if (!br_multicast_ctx_should_use(brmctx, pmctx)) + goto unlock_continue; + + mdst = br_mdb_ip4_get(brmctx->br, group, vid); + if (!mdst) + goto unlock_continue; + pg = br_multicast_find_port(mdst, pmctx->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(brmctx, pg, h_addr, + grec->grec_src, + nsrcs, sizeof(__be32), type); + break; + case IGMPV3_MODE_IS_INCLUDE: + changed = br_multicast_isinc_allow(brmctx, pg, h_addr, + grec->grec_src, + nsrcs, sizeof(__be32), type); + break; + case IGMPV3_MODE_IS_EXCLUDE: + changed = br_multicast_isexc(brmctx, pg, h_addr, + grec->grec_src, + nsrcs, sizeof(__be32), type); + break; + case IGMPV3_CHANGE_TO_INCLUDE: + changed = br_multicast_toin(brmctx, pmctx, pg, h_addr, + grec->grec_src, + nsrcs, sizeof(__be32), type); + break; + case IGMPV3_CHANGE_TO_EXCLUDE: + changed = br_multicast_toex(brmctx, pmctx, pg, h_addr, + grec->grec_src, + nsrcs, sizeof(__be32), type); + break; + case IGMPV3_BLOCK_OLD_SOURCES: + changed = br_multicast_block(brmctx, pmctx, pg, h_addr, + grec->grec_src, + nsrcs, sizeof(__be32), type); + break; + } + if (changed) + br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB); +unlock_continue: + spin_unlock(&brmctx->br->multicast_lock); + } + + return err; +} + +#if IS_ENABLED(CONFIG_IPV6) +static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb, + u16 vid) +{ + bool mldv1 = brmctx->multicast_mld_version == 1; + struct net_bridge_mdb_entry *mdst; + struct net_bridge_port_group *pg; + unsigned int nsrcs_offset; + struct mld2_report *mld2r; + const unsigned char *src; + 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(*mld2r))) + return -EINVAL; + + mld2r = (struct mld2_report *)icmp6_hdr(skb); + num = ntohs(mld2r->mld2r_ngrec); + len = skb_transport_offset(skb) + sizeof(*mld2r); + + 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 (!pmctx || mldv1) { + br_ip6_multicast_leave_group(brmctx, pmctx, + &grec->grec_mca, + vid, src); + continue; + } + } else { + err = br_ip6_multicast_add_group(brmctx, pmctx, + &grec->grec_mca, vid, + src, mldv1); + if (err) + break; + } + + if (!pmctx || mldv1) + continue; + + spin_lock(&brmctx->br->multicast_lock); + if (!br_multicast_ctx_should_use(brmctx, pmctx)) + goto unlock_continue; + + mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid); + if (!mdst) + goto unlock_continue; + pg = br_multicast_find_port(mdst, pmctx->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(brmctx, 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(brmctx, pg, h_addr, + grec->grec_src, nsrcs, + sizeof(struct in6_addr), + grec->grec_type); + break; + case MLD2_MODE_IS_EXCLUDE: + changed = br_multicast_isexc(brmctx, pg, h_addr, + grec->grec_src, nsrcs, + sizeof(struct in6_addr), + grec->grec_type); + break; + case MLD2_CHANGE_TO_INCLUDE: + changed = br_multicast_toin(brmctx, pmctx, pg, h_addr, + grec->grec_src, nsrcs, + sizeof(struct in6_addr), + grec->grec_type); + break; + case MLD2_CHANGE_TO_EXCLUDE: + changed = br_multicast_toex(brmctx, pmctx, pg, h_addr, + grec->grec_src, nsrcs, + sizeof(struct in6_addr), + grec->grec_type); + break; + case MLD2_BLOCK_OLD_SOURCES: + changed = br_multicast_block(brmctx, pmctx, pg, h_addr, + grec->grec_src, nsrcs, + sizeof(struct in6_addr), + grec->grec_type); + break; + } + if (changed) + br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB); +unlock_continue: + spin_unlock(&brmctx->br->multicast_lock); + } + + return err; +} +#endif + +static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct br_ip *saddr) +{ + int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0; + struct timer_list *own_timer, *other_timer; + struct bridge_mcast_querier *querier; + + switch (saddr->proto) { + case htons(ETH_P_IP): + querier = &brmctx->ip4_querier; + own_timer = &brmctx->ip4_own_query.timer; + other_timer = &brmctx->ip4_other_query.timer; + if (!querier->addr.src.ip4 || + ntohl(saddr->src.ip4) <= ntohl(querier->addr.src.ip4)) + goto update; + break; +#if IS_ENABLED(CONFIG_IPV6) + case htons(ETH_P_IPV6): + querier = &brmctx->ip6_querier; + own_timer = &brmctx->ip6_own_query.timer; + other_timer = &brmctx->ip6_other_query.timer; + if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0) + goto update; + break; +#endif + default: + return false; + } + + if (!timer_pending(own_timer) && !timer_pending(other_timer)) + goto update; + + return false; + +update: + br_multicast_update_querier(brmctx, querier, port_ifidx, saddr); + + return true; +} + +static struct net_bridge_port * +__br_multicast_get_querier_port(struct net_bridge *br, + const struct bridge_mcast_querier *querier) +{ + int port_ifidx = READ_ONCE(querier->port_ifidx); + struct net_bridge_port *p; + struct net_device *dev; + + if (port_ifidx == 0) + return NULL; + + dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx); + if (!dev) + return NULL; + p = br_port_get_rtnl_rcu(dev); + if (!p || p->br != br) + return NULL; + + return p; +} + +size_t br_multicast_querier_state_size(void) +{ + return nla_total_size(0) + /* nest attribute */ + nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */ + nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */ + nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */ +#if IS_ENABLED(CONFIG_IPV6) + nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */ + nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IPV6_PORT */ + nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */ +#endif + 0; +} + +/* protected by rtnl or rcu */ +int br_multicast_dump_querier_state(struct sk_buff *skb, + const struct net_bridge_mcast *brmctx, + int nest_attr) +{ + struct bridge_mcast_querier querier = {}; + struct net_bridge_port *p; + struct nlattr *nest; + + if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) || + br_multicast_ctx_vlan_global_disabled(brmctx)) + return 0; + + nest = nla_nest_start(skb, nest_attr); + if (!nest) + return -EMSGSIZE; + + rcu_read_lock(); + if (!brmctx->multicast_querier && + !timer_pending(&brmctx->ip4_other_query.timer)) + goto out_v6; + + br_multicast_read_querier(&brmctx->ip4_querier, &querier); + if (nla_put_in_addr(skb, BRIDGE_QUERIER_IP_ADDRESS, + querier.addr.src.ip4)) { + rcu_read_unlock(); + goto out_err; + } + + p = __br_multicast_get_querier_port(brmctx->br, &querier); + if (timer_pending(&brmctx->ip4_other_query.timer) && + (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IP_OTHER_TIMER, + br_timer_value(&brmctx->ip4_other_query.timer), + BRIDGE_QUERIER_PAD) || + (p && nla_put_u32(skb, BRIDGE_QUERIER_IP_PORT, p->dev->ifindex)))) { + rcu_read_unlock(); + goto out_err; + } + +out_v6: +#if IS_ENABLED(CONFIG_IPV6) + if (!brmctx->multicast_querier && + !timer_pending(&brmctx->ip6_other_query.timer)) + goto out; + + br_multicast_read_querier(&brmctx->ip6_querier, &querier); + if (nla_put_in6_addr(skb, BRIDGE_QUERIER_IPV6_ADDRESS, + &querier.addr.src.ip6)) { + rcu_read_unlock(); + goto out_err; + } + + p = __br_multicast_get_querier_port(brmctx->br, &querier); + if (timer_pending(&brmctx->ip6_other_query.timer) && + (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IPV6_OTHER_TIMER, + br_timer_value(&brmctx->ip6_other_query.timer), + BRIDGE_QUERIER_PAD) || + (p && nla_put_u32(skb, BRIDGE_QUERIER_IPV6_PORT, + p->dev->ifindex)))) { + rcu_read_unlock(); + goto out_err; + } +out: +#endif + rcu_read_unlock(); + nla_nest_end(skb, nest); + if (!nla_len(nest)) + nla_nest_cancel(skb, nest); + + return 0; + +out_err: + nla_nest_cancel(skb, nest); + return -EMSGSIZE; +} + +static void +br_multicast_update_query_timer(struct net_bridge_mcast *brmctx, + 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 + brmctx->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); +} + +static struct net_bridge_port * +br_multicast_rport_from_node(struct net_bridge_mcast *brmctx, + struct hlist_head *mc_router_list, + struct hlist_node *rlist) +{ + struct net_bridge_mcast_port *pmctx; + +#if IS_ENABLED(CONFIG_IPV6) + if (mc_router_list == &brmctx->ip6_mc_router_list) + pmctx = hlist_entry(rlist, struct net_bridge_mcast_port, + ip6_rlist); + else +#endif + pmctx = hlist_entry(rlist, struct net_bridge_mcast_port, + ip4_rlist); + + return pmctx->port; +} + +static struct hlist_node * +br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx, + struct net_bridge_port *port, + struct hlist_head *mc_router_list) + +{ + struct hlist_node *slot = NULL; + struct net_bridge_port *p; + struct hlist_node *rlist; + + hlist_for_each(rlist, mc_router_list) { + p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist); + + if ((unsigned long)port >= (unsigned long)p) + break; + + slot = rlist; + } + + return slot; +} + +static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx, + struct hlist_node *rnode) +{ +#if IS_ENABLED(CONFIG_IPV6) + if (rnode != &pmctx->ip6_rlist) + return hlist_unhashed(&pmctx->ip6_rlist); + else + return hlist_unhashed(&pmctx->ip4_rlist); +#else + return true; +#endif +} + +/* 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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct hlist_node *rlist, + struct hlist_head *mc_router_list) +{ + struct hlist_node *slot; + + if (!hlist_unhashed(rlist)) + return; + + slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list); + + if (slot) + hlist_add_behind_rcu(rlist, slot); + else + hlist_add_head_rcu(rlist, mc_router_list); + + /* For backwards compatibility for now, only notify if we + * switched from no IPv4/IPv6 multicast router to a new + * IPv4 or IPv6 multicast router. + */ + if (br_multicast_no_router_otherpf(pmctx, rlist)) { + br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB); + br_port_mc_router_state_change(pmctx->port, true); + } +} + +/* Add port to router_list + * list is maintained ordered by pointer value + * and locked by br->multicast_lock and RCU + */ +static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx) +{ + br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist, + &brmctx->ip4_mc_router_list); +} + +/* Add port to router_list + * list is maintained ordered by pointer value + * and locked by br->multicast_lock and RCU + */ +static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx) +{ +#if IS_ENABLED(CONFIG_IPV6) + br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist, + &brmctx->ip6_mc_router_list); +#endif +} + +static void br_multicast_mark_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct timer_list *timer, + struct hlist_node *rlist, + struct hlist_head *mc_router_list) +{ + unsigned long now = jiffies; + + if (!br_multicast_ctx_should_use(brmctx, pmctx)) + return; + + if (!pmctx) { + if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { + if (!br_ip4_multicast_is_router(brmctx) && + !br_ip6_multicast_is_router(brmctx)) + br_mc_router_state_change(brmctx->br, true); + mod_timer(timer, now + brmctx->multicast_querier_interval); + } + return; + } + + if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED || + pmctx->multicast_router == MDB_RTR_TYPE_PERM) + return; + + br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list); + mod_timer(timer, now + brmctx->multicast_querier_interval); +} + +static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx) +{ + struct timer_list *timer = &brmctx->ip4_mc_router_timer; + struct hlist_node *rlist = NULL; + + if (pmctx) { + timer = &pmctx->ip4_mc_router_timer; + rlist = &pmctx->ip4_rlist; + } + + br_multicast_mark_router(brmctx, pmctx, timer, rlist, + &brmctx->ip4_mc_router_list); +} + +static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx) +{ +#if IS_ENABLED(CONFIG_IPV6) + struct timer_list *timer = &brmctx->ip6_mc_router_timer; + struct hlist_node *rlist = NULL; + + if (pmctx) { + timer = &pmctx->ip6_mc_router_timer; + rlist = &pmctx->ip6_rlist; + } + + br_multicast_mark_router(brmctx, pmctx, timer, rlist, + &brmctx->ip6_mc_router_list); +#endif +} + +static void +br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct bridge_mcast_other_query *query, + struct br_ip *saddr, + unsigned long max_delay) +{ + if (!br_multicast_select_querier(brmctx, pmctx, saddr)) + return; + + br_multicast_update_query_timer(brmctx, query, max_delay); + br_ip4_multicast_mark_router(brmctx, pmctx); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void +br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct bridge_mcast_other_query *query, + struct br_ip *saddr, + unsigned long max_delay) +{ + if (!br_multicast_select_querier(brmctx, pmctx, saddr)) + return; + + br_multicast_update_query_timer(brmctx, query, max_delay); + br_ip6_multicast_mark_router(brmctx, pmctx); +} +#endif + +static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(&brmctx->br->multicast_lock); + if (!br_multicast_ctx_should_use(brmctx, pmctx)) + 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 || + (brmctx->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_ip4_multicast_query_received(brmctx, pmctx, + &brmctx->ip4_other_query, + &saddr, max_delay); + goto out; + } + + mp = br_mdb_ip4_get(brmctx->br, group, vid); + if (!mp) + goto out; + + max_delay *= brmctx->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, brmctx->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 && + (brmctx->multicast_igmp_version == 2 || + p->filter_mode == MCAST_EXCLUDE)) + mod_timer(&p->timer, now + max_delay); + } + +out: + spin_unlock(&brmctx->br->multicast_lock); +} + +#if IS_ENABLED(CONFIG_IPV6) +static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(&brmctx->br->multicast_lock); + if (!br_multicast_ctx_should_use(brmctx, pmctx)) + 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 (brmctx->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_ip6_multicast_query_received(brmctx, pmctx, + &brmctx->ip6_other_query, + &saddr, max_delay); + goto out; + } else if (!group) { + goto out; + } + + mp = br_mdb_ip6_get(brmctx->br, group, vid); + if (!mp) + goto out; + + max_delay *= brmctx->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, brmctx->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 && + (brmctx->multicast_mld_version == 1 || + p->filter_mode == MCAST_EXCLUDE)) + mod_timer(&p->timer, now + max_delay); + } + +out: + spin_unlock(&brmctx->br->multicast_lock); + return err; +} +#endif + +static void +br_multicast_leave_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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(&brmctx->br->multicast_lock); + if (!br_multicast_ctx_should_use(brmctx, pmctx)) + goto out; + + mp = br_mdb_ip_get(brmctx->br, group); + if (!mp) + goto out; + + if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) { + struct net_bridge_port_group __rcu **pp; + + for (pp = &mp->ports; + (p = mlock_dereference(*pp, brmctx->br)) != NULL; + pp = &p->next) { + if (!br_port_group_equal(p, pmctx->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 (brmctx->multicast_querier) { + __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr, + false, 0, NULL); + + time = jiffies + brmctx->multicast_last_member_count * + brmctx->multicast_last_member_interval; + + mod_timer(&own_query->timer, time); + + for (p = mlock_dereference(mp->ports, brmctx->br); + p != NULL && pmctx != NULL; + p = mlock_dereference(p->next, brmctx->br)) { + if (!br_port_group_equal(p, pmctx->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 + brmctx->multicast_last_member_count * + brmctx->multicast_last_member_interval; + + if (!pmctx) { + 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, brmctx->br); + p != NULL; + p = mlock_dereference(p->next, brmctx->br)) { + if (p->key.port != pmctx->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(&brmctx->br->multicast_lock); +} + +static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + __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 = pmctx ? &pmctx->ip4_own_query : &brmctx->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(brmctx, pmctx, &br_group, + &brmctx->ip4_other_query, + own_query, src); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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 = pmctx ? &pmctx->ip6_own_query : &brmctx->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(brmctx, pmctx, &br_group, + &brmctx->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_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + 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; + + spin_lock(&brmctx->br->multicast_lock); + br_ip4_multicast_mark_router(brmctx, pmctx); + spin_unlock(&brmctx->br->multicast_lock); +} + +static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb) +{ + if (ip_hdr(skb)->protocol != IPPROTO_IGMP || + igmp_hdr(skb)->type != IGMP_MRDISC_ADV) + return -ENOMSG; + + spin_lock(&brmctx->br->multicast_lock); + br_ip4_multicast_mark_router(brmctx, pmctx); + spin_unlock(&brmctx->br->multicast_lock); + + return 0; +} + +static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb, + u16 vid) +{ + struct net_bridge_port *p = pmctx ? pmctx->port : NULL; + 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(brmctx, pmctx, skb); + } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) { + br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb); + } + + return 0; + } else if (err < 0) { + br_multicast_err_count(brmctx->br, p, 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(brmctx, pmctx, ih->group, vid, + src, true); + break; + case IGMPV3_HOST_MEMBERSHIP_REPORT: + err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid); + break; + case IGMP_HOST_MEMBERSHIP_QUERY: + br_ip4_multicast_query(brmctx, pmctx, skb, vid); + break; + case IGMP_HOST_LEAVE_MESSAGE: + br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src); + break; + } + + br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp, + BR_MCAST_DIR_RX); + + return err; +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb) +{ + if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV) + return; + + spin_lock(&brmctx->br->multicast_lock); + br_ip6_multicast_mark_router(brmctx, pmctx); + spin_unlock(&brmctx->br->multicast_lock); +} + +static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx, + struct net_bridge_mcast_port *pmctx, + struct sk_buff *skb, + u16 vid) +{ + struct net_bridge_port *p = pmctx ? pmctx->port : NULL; + const unsigned char *src; + struct mld_msg *mld; + int err; + + err = ipv6_mc_check_mld(skb); + + if (err == -ENOMSG || err == -ENODATA) { + if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) + BR_INPUT_SKB_CB(skb)->mrouters_only = 1; + if (err == -ENODATA && + ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) + br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb); + + return 0; + } else if (err < 0) { + br_multicast_err_count(brmctx->br, p, 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(brmctx, pmctx, &mld->mld_mca, + vid, src, true); + break; + case ICMPV6_MLD2_REPORT: + err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid); + break; + case ICMPV6_MGM_QUERY: + err = br_ip6_multicast_query(brmctx, pmctx, skb, vid); + break; + case ICMPV6_MGM_REDUCTION: + src = eth_hdr(skb)->h_source; + br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid, + src); + break; + } + + br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp, + BR_MCAST_DIR_RX); + + return err; +} +#endif + +int br_multicast_rcv(struct net_bridge_mcast **brmctx, + struct net_bridge_mcast_port **pmctx, + struct net_bridge_vlan *vlan, + 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((*brmctx)->br, BROPT_MULTICAST_ENABLED)) + return 0; + + if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) { + const struct net_bridge_vlan *masterv; + + /* the vlan has the master flag set only when transmitting + * through the bridge device + */ + if (br_vlan_is_master(vlan)) { + masterv = vlan; + *brmctx = &vlan->br_mcast_ctx; + *pmctx = NULL; + } else { + masterv = vlan->brvlan; + *brmctx = &vlan->brvlan->br_mcast_ctx; + *pmctx = &vlan->port_mcast_ctx; + } + + if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)) + return 0; + } + + switch (skb->protocol) { + case htons(ETH_P_IP): + ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid); + break; +#if IS_ENABLED(CONFIG_IPV6) + case htons(ETH_P_IPV6): + ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid); + break; +#endif + } + + return ret; +} + +static void br_multicast_query_expired(struct net_bridge_mcast *brmctx, + struct bridge_mcast_own_query *query, + struct bridge_mcast_querier *querier) +{ + spin_lock(&brmctx->br->multicast_lock); + if (br_multicast_ctx_vlan_disabled(brmctx)) + goto out; + + if (query->startup_sent < brmctx->multicast_startup_query_count) + query->startup_sent++; + + br_multicast_send_query(brmctx, NULL, query); +out: + spin_unlock(&brmctx->br->multicast_lock); +} + +static void br_ip4_multicast_query_expired(struct timer_list *t) +{ + struct net_bridge_mcast *brmctx = from_timer(brmctx, t, + ip4_own_query.timer); + + br_multicast_query_expired(brmctx, &brmctx->ip4_own_query, + &brmctx->ip4_querier); +} + +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_query_expired(struct timer_list *t) +{ + struct net_bridge_mcast *brmctx = from_timer(brmctx, t, + ip6_own_query.timer); + + br_multicast_query_expired(brmctx, &brmctx->ip6_own_query, + &brmctx->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_ctx_init(struct net_bridge *br, + struct net_bridge_vlan *vlan, + struct net_bridge_mcast *brmctx) +{ + brmctx->br = br; + brmctx->vlan = vlan; + brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; + brmctx->multicast_last_member_count = 2; + brmctx->multicast_startup_query_count = 2; + + brmctx->multicast_last_member_interval = HZ; + brmctx->multicast_query_response_interval = 10 * HZ; + brmctx->multicast_startup_query_interval = 125 * HZ / 4; + brmctx->multicast_query_interval = 125 * HZ; + brmctx->multicast_querier_interval = 255 * HZ; + brmctx->multicast_membership_interval = 260 * HZ; + + brmctx->ip4_other_query.delay_time = 0; + brmctx->ip4_querier.port_ifidx = 0; + seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock); + brmctx->multicast_igmp_version = 2; +#if IS_ENABLED(CONFIG_IPV6) + brmctx->multicast_mld_version = 1; + brmctx->ip6_other_query.delay_time = 0; + brmctx->ip6_querier.port_ifidx = 0; + seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock); +#endif + + timer_setup(&brmctx->ip4_mc_router_timer, + br_ip4_multicast_local_router_expired, 0); + timer_setup(&brmctx->ip4_other_query.timer, + br_ip4_multicast_querier_expired, 0); + timer_setup(&brmctx->ip4_own_query.timer, + br_ip4_multicast_query_expired, 0); +#if IS_ENABLED(CONFIG_IPV6) + timer_setup(&brmctx->ip6_mc_router_timer, + br_ip6_multicast_local_router_expired, 0); + timer_setup(&brmctx->ip6_other_query.timer, + br_ip6_multicast_querier_expired, 0); + timer_setup(&brmctx->ip6_own_query.timer, + br_ip6_multicast_query_expired, 0); +#endif +} + +void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) +{ + __br_multicast_stop(brmctx); +} + +void br_multicast_init(struct net_bridge *br) +{ + br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; + + br_multicast_ctx_init(br, NULL, &br->multicast_ctx); + + br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); + br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); + + spin_lock_init(&br->multicast_lock); + 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_query(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); +} + +static void __br_multicast_open(struct net_bridge_mcast *brmctx) +{ + __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query); +#if IS_ENABLED(CONFIG_IPV6) + __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query); +#endif +} + +void br_multicast_open(struct net_bridge *br) +{ + ASSERT_RTNL(); + + if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { + struct net_bridge_vlan_group *vg; + struct net_bridge_vlan *vlan; + + vg = br_vlan_group(br); + if (vg) { + list_for_each_entry(vlan, &vg->vlan_list, vlist) { + struct net_bridge_mcast *brmctx; + + brmctx = &vlan->br_mcast_ctx; + if (br_vlan_is_brentry(vlan) && + !br_multicast_ctx_vlan_disabled(brmctx)) + __br_multicast_open(&vlan->br_mcast_ctx); + } + } + } else { + __br_multicast_open(&br->multicast_ctx); + } +} + +static void __br_multicast_stop(struct net_bridge_mcast *brmctx) +{ + del_timer_sync(&brmctx->ip4_mc_router_timer); + del_timer_sync(&brmctx->ip4_other_query.timer); + del_timer_sync(&brmctx->ip4_own_query.timer); +#if IS_ENABLED(CONFIG_IPV6) + del_timer_sync(&brmctx->ip6_mc_router_timer); + del_timer_sync(&brmctx->ip6_other_query.timer); + del_timer_sync(&brmctx->ip6_own_query.timer); +#endif +} + +void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on) +{ + struct net_bridge *br; + + /* it's okay to check for the flag without the multicast lock because it + * can only change under RTNL -> multicast_lock, we need the latter to + * sync with timers and packets + */ + if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED)) + return; + + if (br_vlan_is_master(vlan)) { + br = vlan->br; + + if (!br_vlan_is_brentry(vlan) || + (on && + br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx))) + return; + + spin_lock_bh(&br->multicast_lock); + vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED; + spin_unlock_bh(&br->multicast_lock); + + if (on) + __br_multicast_open(&vlan->br_mcast_ctx); + else + __br_multicast_stop(&vlan->br_mcast_ctx); + } else { + struct net_bridge_mcast *brmctx; + + brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx); + if (on && br_multicast_ctx_vlan_global_disabled(brmctx)) + return; + + br = vlan->port->br; + spin_lock_bh(&br->multicast_lock); + vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED; + if (on) + __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx); + else + __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx); + spin_unlock_bh(&br->multicast_lock); + } +} + +static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on) +{ + struct net_bridge_port *p; + + if (WARN_ON_ONCE(!br_vlan_is_master(vlan))) + return; + + list_for_each_entry(p, &vlan->br->port_list, list) { + struct net_bridge_vlan *vport; + + vport = br_vlan_find(nbp_vlan_group(p), vlan->vid); + if (!vport) + continue; + br_multicast_toggle_one_vlan(vport, on); + } + + if (br_vlan_is_brentry(vlan)) + br_multicast_toggle_one_vlan(vlan, on); +} + +int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, + struct netlink_ext_ack *extack) +{ + struct net_bridge_vlan_group *vg; + struct net_bridge_vlan *vlan; + struct net_bridge_port *p; + + if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on) + return 0; + + if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) { + NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled"); + return -EINVAL; + } + + vg = br_vlan_group(br); + if (!vg) + return 0; + + br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on); + + /* disable/enable non-vlan mcast contexts based on vlan snooping */ + if (on) + __br_multicast_stop(&br->multicast_ctx); + else + __br_multicast_open(&br->multicast_ctx); + list_for_each_entry(p, &br->port_list, list) { + if (on) + br_multicast_disable_port(p); + else + br_multicast_enable_port(p); + } + + list_for_each_entry(vlan, &vg->vlan_list, vlist) + br_multicast_toggle_vlan(vlan, on); + + return 0; +} + +bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on) +{ + ASSERT_RTNL(); + + /* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and + * requires only RTNL to change + */ + if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)) + return false; + + vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED; + br_multicast_toggle_vlan(vlan, on); + + return true; +} + +void br_multicast_stop(struct net_bridge *br) +{ + ASSERT_RTNL(); + + if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { + struct net_bridge_vlan_group *vg; + struct net_bridge_vlan *vlan; + + vg = br_vlan_group(br); + if (vg) { + list_for_each_entry(vlan, &vg->vlan_list, vlist) { + struct net_bridge_mcast *brmctx; + + brmctx = &vlan->br_mcast_ctx; + if (br_vlan_is_brentry(vlan) && + !br_multicast_ctx_vlan_disabled(brmctx)) + __br_multicast_stop(&vlan->br_mcast_ctx); + } + } + } else { + __br_multicast_stop(&br->multicast_ctx); + } +} + +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_ctx_deinit(&br->multicast_ctx); + br_multicast_gc(&deleted_head); + cancel_work_sync(&br->mcast_gc_work); + + rcu_barrier(); +} + +int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val) +{ + int err = -EINVAL; + + spin_lock_bh(&brmctx->br->multicast_lock); + + switch (val) { + case MDB_RTR_TYPE_DISABLED: + case MDB_RTR_TYPE_PERM: + br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM); + del_timer(&brmctx->ip4_mc_router_timer); +#if IS_ENABLED(CONFIG_IPV6) + del_timer(&brmctx->ip6_mc_router_timer); +#endif + brmctx->multicast_router = val; + err = 0; + break; + case MDB_RTR_TYPE_TEMP_QUERY: + if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) + br_mc_router_state_change(brmctx->br, false); + brmctx->multicast_router = val; + err = 0; + break; + } + + spin_unlock_bh(&brmctx->br->multicast_lock); + + return err; +} + +static void +br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted) +{ + if (!deleted) + return; + + /* For backwards compatibility for now, only notify if there is + * no multicast router anymore for both IPv4 and IPv6. + */ + if (!hlist_unhashed(&pmctx->ip4_rlist)) + return; +#if IS_ENABLED(CONFIG_IPV6) + if (!hlist_unhashed(&pmctx->ip6_rlist)) + return; +#endif + + br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB); + br_port_mc_router_state_change(pmctx->port, false); + + /* don't allow timer refresh */ + if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) + pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; +} + +int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, + unsigned long val) +{ + struct net_bridge_mcast *brmctx; + unsigned long now = jiffies; + int err = -EINVAL; + bool del = false; + + brmctx = br_multicast_port_ctx_get_global(pmctx); + spin_lock_bh(&brmctx->br->multicast_lock); + if (pmctx->multicast_router == val) { + /* Refresh the temp router port timer */ + if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) { + mod_timer(&pmctx->ip4_mc_router_timer, + now + brmctx->multicast_querier_interval); +#if IS_ENABLED(CONFIG_IPV6) + mod_timer(&pmctx->ip6_mc_router_timer, + now + brmctx->multicast_querier_interval); +#endif + } + err = 0; + goto unlock; + } + switch (val) { + case MDB_RTR_TYPE_DISABLED: + pmctx->multicast_router = MDB_RTR_TYPE_DISABLED; + del |= br_ip4_multicast_rport_del(pmctx); + del_timer(&pmctx->ip4_mc_router_timer); + del |= br_ip6_multicast_rport_del(pmctx); +#if IS_ENABLED(CONFIG_IPV6) + del_timer(&pmctx->ip6_mc_router_timer); +#endif + br_multicast_rport_del_notify(pmctx, del); + break; + case MDB_RTR_TYPE_TEMP_QUERY: + pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; + del |= br_ip4_multicast_rport_del(pmctx); + del |= br_ip6_multicast_rport_del(pmctx); + br_multicast_rport_del_notify(pmctx, del); + break; + case MDB_RTR_TYPE_PERM: + pmctx->multicast_router = MDB_RTR_TYPE_PERM; + del_timer(&pmctx->ip4_mc_router_timer); + br_ip4_multicast_add_router(brmctx, pmctx); +#if IS_ENABLED(CONFIG_IPV6) + del_timer(&pmctx->ip6_mc_router_timer); +#endif + br_ip6_multicast_add_router(brmctx, pmctx); + break; + case MDB_RTR_TYPE_TEMP: + pmctx->multicast_router = MDB_RTR_TYPE_TEMP; + br_ip4_multicast_mark_router(brmctx, pmctx); + br_ip6_multicast_mark_router(brmctx, pmctx); + break; + default: + goto unlock; + } + err = 0; +unlock: + spin_unlock_bh(&brmctx->br->multicast_lock); + + return err; +} + +int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router) +{ + int err; + + if (br_vlan_is_master(v)) + err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router); + else + err = br_multicast_set_port_router(&v->port_mcast_ctx, + mcast_router); + + return err; +} + +static void br_multicast_start_querier(struct net_bridge_mcast *brmctx, + struct bridge_mcast_own_query *query) +{ + struct net_bridge_port *port; + + if (!br_multicast_ctx_matches_vlan_snooping(brmctx)) + return; + + __br_multicast_open_query(brmctx->br, query); + + rcu_read_lock(); + list_for_each_entry_rcu(port, &brmctx->br->port_list, list) { + struct bridge_mcast_own_query *ip4_own_query; +#if IS_ENABLED(CONFIG_IPV6) + struct bridge_mcast_own_query *ip6_own_query; +#endif + + if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx)) + continue; + + if (br_multicast_ctx_is_vlan(brmctx)) { + struct net_bridge_vlan *vlan; + + vlan = br_vlan_find(nbp_vlan_group_rcu(port), + brmctx->vlan->vid); + if (!vlan || + br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx)) + continue; + + ip4_own_query = &vlan->port_mcast_ctx.ip4_own_query; +#if IS_ENABLED(CONFIG_IPV6) + ip6_own_query = &vlan->port_mcast_ctx.ip6_own_query; +#endif + } else { + ip4_own_query = &port->multicast_ctx.ip4_own_query; +#if IS_ENABLED(CONFIG_IPV6) + ip6_own_query = &port->multicast_ctx.ip6_own_query; +#endif + } + + if (query == &brmctx->ip4_own_query) + br_multicast_enable(ip4_own_query); +#if IS_ENABLED(CONFIG_IPV6) + else + br_multicast_enable(ip6_own_query); +#endif + } + rcu_read_unlock(); +} + +int br_multicast_toggle(struct net_bridge *br, unsigned long val, + struct netlink_ext_ack *extack) +{ + struct net_bridge_port *port; + bool change_snoopers = false; + int err = 0; + + spin_lock_bh(&br->multicast_lock); + if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) + goto unlock; + + err = br_mc_disabled_update(br->dev, val, extack); + if (err == -EOPNOTSUPP) + err = 0; + if (err) + goto unlock; + + 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_ctx(&port->multicast_ctx); + + 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 err; +} + +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->multicast_ctx, NULL); + spin_unlock_bh(&br->multicast_lock); + return is_router; +} +EXPORT_SYMBOL_GPL(br_multicast_router); + +int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val) +{ + unsigned long max_delay; + + val = !!val; + + spin_lock_bh(&brmctx->br->multicast_lock); + if (brmctx->multicast_querier == val) + goto unlock; + + WRITE_ONCE(brmctx->multicast_querier, val); + if (!val) + goto unlock; + + max_delay = brmctx->multicast_query_response_interval; + + if (!timer_pending(&brmctx->ip4_other_query.timer)) + brmctx->ip4_other_query.delay_time = jiffies + max_delay; + + br_multicast_start_querier(brmctx, &brmctx->ip4_own_query); + +#if IS_ENABLED(CONFIG_IPV6) + if (!timer_pending(&brmctx->ip6_other_query.timer)) + brmctx->ip6_other_query.delay_time = jiffies + max_delay; + + br_multicast_start_querier(brmctx, &brmctx->ip6_own_query); +#endif + +unlock: + spin_unlock_bh(&brmctx->br->multicast_lock); + + return 0; +} + +int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, + unsigned long val) +{ + /* Currently we support only version 2 and 3 */ + switch (val) { + case 2: + case 3: + break; + default: + return -EINVAL; + } + + spin_lock_bh(&brmctx->br->multicast_lock); + brmctx->multicast_igmp_version = val; + spin_unlock_bh(&brmctx->br->multicast_lock); + + return 0; +} + +#if IS_ENABLED(CONFIG_IPV6) +int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, + unsigned long val) +{ + /* Currently we support version 1 and 2 */ + switch (val) { + case 1: + case 2: + break; + default: + return -EINVAL; + } + + spin_lock_bh(&brmctx->br->multicast_lock); + brmctx->multicast_mld_version = val; + spin_unlock_bh(&brmctx->br->multicast_lock); + + return 0; +} +#endif + +void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, + unsigned long val) +{ + unsigned long intvl_jiffies = clock_t_to_jiffies(val); + + if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) { + br_info(brmctx->br, + "trying to set multicast query interval below minimum, setting to %lu (%ums)\n", + jiffies_to_clock_t(BR_MULTICAST_QUERY_INTVL_MIN), + jiffies_to_msecs(BR_MULTICAST_QUERY_INTVL_MIN)); + intvl_jiffies = BR_MULTICAST_QUERY_INTVL_MIN; + } + + brmctx->multicast_query_interval = intvl_jiffies; +} + +void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, + unsigned long val) +{ + unsigned long intvl_jiffies = clock_t_to_jiffies(val); + + if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) { + br_info(brmctx->br, + "trying to set multicast startup query interval below minimum, setting to %lu (%ums)\n", + jiffies_to_clock_t(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN), + jiffies_to_msecs(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN)); + intvl_jiffies = BR_MULTICAST_STARTUP_QUERY_INTVL_MIN; + } + + brmctx->multicast_startup_query_interval = intvl_jiffies; +} + +/** + * 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->multicast_ctx, 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_mcast *brmctx; + struct net_bridge *br; + struct net_bridge_port *port; + bool ret = false; + int port_ifidx; + + 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; + brmctx = &br->multicast_ctx; + + switch (proto) { + case ETH_P_IP: + port_ifidx = brmctx->ip4_querier.port_ifidx; + if (!timer_pending(&brmctx->ip4_other_query.timer) || + port_ifidx == port->dev->ifindex) + goto unlock; + break; +#if IS_ENABLED(CONFIG_IPV6) + case ETH_P_IPV6: + port_ifidx = brmctx->ip6_querier.port_ifidx; + if (!timer_pending(&brmctx->ip6_other_query.timer) || + port_ifidx == port->dev->ifindex) + goto unlock; + break; +#endif + default: + goto unlock; + } + + ret = true; +unlock: + rcu_read_unlock(); + return ret; +} +EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); + +/** + * br_multicast_has_router_adjacent - Checks for a router behind a bridge port + * @dev: The bridge port adjacent to which to check for a multicast router + * @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 multicast router is behind one of the other ports of this + * bridge. Otherwise returns false. + */ +bool br_multicast_has_router_adjacent(struct net_device *dev, int proto) +{ + struct net_bridge_mcast_port *pmctx; + struct net_bridge_mcast *brmctx; + struct net_bridge_port *port; + bool ret = false; + + rcu_read_lock(); + port = br_port_get_check_rcu(dev); + if (!port) + goto unlock; + + brmctx = &port->br->multicast_ctx; + switch (proto) { + case ETH_P_IP: + hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list, + ip4_rlist) { + if (pmctx->port == port) + continue; + + ret = true; + goto unlock; + } + break; +#if IS_ENABLED(CONFIG_IPV6) + case ETH_P_IPV6: + hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list, + ip6_rlist) { + if (pmctx->port == port) + continue; + + ret = true; + goto unlock; + } + break; +#endif + default: + /* when compiled without IPv6 support, be conservative and + * always assume presence of an IPv6 multicast router + */ + ret = true; + } + +unlock: + rcu_read_unlock(); + return ret; +} +EXPORT_SYMBOL_GPL(br_multicast_has_router_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(&cpu_stats->syncp); + memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); + } while (u64_stats_fetch_retry(&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); +} |