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-rw-r--r--net/bridge/br_multicast.c4946
1 files changed, 4946 insertions, 0 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
new file mode 100644
index 000000000..db4f2641d
--- /dev/null
+++ b/net/bridge/br_multicast.c
@@ -0,0 +1,4946 @@
+// 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 "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;
+}
+
+/* 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))
+ break;
+
+ if (fastleave)
+ p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
+ br_multicast_del_pg(mp, p, pp);
+ break;
+ }
+ src->flags &= ~BR_SGRP_F_INSTALLED;
+}
+
+/* install S,G and based on src's timer enable or disable forwarding */
+static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
+{
+ struct net_bridge_port_group_sg_key sg_key;
+ struct net_bridge_port_group *sg;
+ u8 old_flags;
+
+ br_multicast_fwd_src_add(src);
+
+ memset(&sg_key, 0, sizeof(sg_key));
+ sg_key.addr = src->pg->key.addr;
+ sg_key.addr.src = src->addr.src;
+ sg_key.port = src->pg->key.port;
+
+ sg = br_sg_port_find(src->br, &sg_key);
+ if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
+ return;
+
+ old_flags = sg->flags;
+ if (timer_pending(&src->timer))
+ sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
+ else
+ sg->flags |= MDB_PG_FLAGS_BLOCKED;
+
+ if (old_flags != sg->flags) {
+ struct net_bridge_mdb_entry *sg_mp;
+
+ sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
+ if (!sg_mp)
+ return;
+ br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
+ }
+}
+
+static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
+{
+ struct net_bridge_mdb_entry *mp;
+
+ mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
+ WARN_ON(!hlist_unhashed(&mp->mdb_node));
+ WARN_ON(mp->ports);
+
+ del_timer_sync(&mp->timer);
+ kfree_rcu(mp, rcu);
+}
+
+static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
+{
+ struct net_bridge *br = mp->br;
+
+ rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
+ br_mdb_rht_params);
+ hlist_del_init_rcu(&mp->mdb_node);
+ hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
+ queue_work(system_long_wq, &br->mcast_gc_work);
+}
+
+static void br_multicast_group_expired(struct timer_list *t)
+{
+ struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
+ struct net_bridge *br = mp->br;
+
+ spin_lock(&br->multicast_lock);
+ if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
+ timer_pending(&mp->timer))
+ goto out;
+
+ br_multicast_host_leave(mp, true);
+
+ if (mp->ports)
+ goto out;
+ br_multicast_del_mdb_entry(mp);
+out:
+ spin_unlock(&br->multicast_lock);
+}
+
+static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
+{
+ struct net_bridge_group_src *src;
+
+ src = container_of(gc, struct net_bridge_group_src, mcast_gc);
+ WARN_ON(!hlist_unhashed(&src->node));
+
+ del_timer_sync(&src->timer);
+ kfree_rcu(src, rcu);
+}
+
+void br_multicast_del_group_src(struct net_bridge_group_src *src,
+ bool fastleave)
+{
+ struct net_bridge *br = src->pg->key.port->br;
+
+ br_multicast_fwd_src_remove(src, fastleave);
+ hlist_del_init_rcu(&src->node);
+ src->pg->src_ents--;
+ hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
+ queue_work(system_long_wq, &br->mcast_gc_work);
+}
+
+static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
+{
+ struct net_bridge_port_group *pg;
+
+ pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
+ WARN_ON(!hlist_unhashed(&pg->mglist));
+ WARN_ON(!hlist_empty(&pg->src_list));
+
+ del_timer_sync(&pg->rexmit_timer);
+ del_timer_sync(&pg->timer);
+ kfree_rcu(pg, rcu);
+}
+
+void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
+ struct net_bridge_port_group *pg,
+ struct net_bridge_port_group __rcu **pp)
+{
+ struct net_bridge *br = pg->key.port->br;
+ struct net_bridge_group_src *ent;
+ struct hlist_node *tmp;
+
+ rcu_assign_pointer(*pp, pg->next);
+ hlist_del_init(&pg->mglist);
+ br_multicast_eht_clean_sets(pg);
+ hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
+ br_multicast_del_group_src(ent, false);
+ br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
+ if (!br_multicast_is_star_g(&mp->addr)) {
+ rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
+ br_sg_port_rht_params);
+ br_multicast_sg_del_exclude_ports(mp);
+ } else {
+ br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
+ }
+ hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
+ queue_work(system_long_wq, &br->mcast_gc_work);
+
+ if (!mp->ports && !mp->host_joined && netif_running(br->dev))
+ mod_timer(&mp->timer, jiffies);
+}
+
+static void br_multicast_find_del_pg(struct net_bridge *br,
+ struct net_bridge_port_group *pg)
+{
+ struct net_bridge_port_group __rcu **pp;
+ struct net_bridge_mdb_entry *mp;
+ struct net_bridge_port_group *p;
+
+ mp = br_mdb_ip_get(br, &pg->key.addr);
+ if (WARN_ON(!mp))
+ return;
+
+ for (pp = &mp->ports;
+ (p = mlock_dereference(*pp, br)) != NULL;
+ pp = &p->next) {
+ if (p != pg)
+ continue;
+
+ br_multicast_del_pg(mp, pg, pp);
+ return;
+ }
+
+ WARN_ON(1);
+}
+
+static void br_multicast_port_group_expired(struct timer_list *t)
+{
+ struct net_bridge_port_group *pg = from_timer(pg, t, timer);
+ struct net_bridge_group_src *src_ent;
+ struct net_bridge *br = pg->key.port->br;
+ struct hlist_node *tmp;
+ bool changed;
+
+ spin_lock(&br->multicast_lock);
+ if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
+ hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
+ goto out;
+
+ changed = !!(pg->filter_mode == MCAST_EXCLUDE);
+ pg->filter_mode = MCAST_INCLUDE;
+ hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
+ if (!timer_pending(&src_ent->timer)) {
+ br_multicast_del_group_src(src_ent, false);
+ changed = true;
+ }
+ }
+
+ if (hlist_empty(&pg->src_list)) {
+ br_multicast_find_del_pg(br, pg);
+ } else if (changed) {
+ struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
+
+ if (changed && br_multicast_is_star_g(&pg->key.addr))
+ br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
+
+ if (WARN_ON(!mp))
+ goto out;
+ br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
+ }
+out:
+ spin_unlock(&br->multicast_lock);
+}
+
+static void br_multicast_gc(struct hlist_head *head)
+{
+ struct net_bridge_mcast_gc *gcent;
+ struct hlist_node *tmp;
+
+ hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
+ hlist_del_init(&gcent->gc_node);
+ gcent->destroy(gcent);
+ }
+}
+
+static 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) {
+ 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;
+}
+
+static struct net_bridge_group_src *
+br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
+{
+ struct net_bridge_group_src *grp_src;
+
+ if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
+ return NULL;
+
+ switch (src_ip->proto) {
+ case htons(ETH_P_IP):
+ if (ipv4_is_zeronet(src_ip->src.ip4) ||
+ ipv4_is_multicast(src_ip->src.ip4))
+ return NULL;
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case htons(ETH_P_IPV6):
+ if (ipv6_addr_any(&src_ip->src.ip6) ||
+ ipv6_addr_is_multicast(&src_ip->src.ip6))
+ return NULL;
+ break;
+#endif
+ }
+
+ grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
+ if (unlikely(!grp_src))
+ return NULL;
+
+ grp_src->pg = pg;
+ grp_src->br = pg->key.port->br;
+ grp_src->addr = *src_ip;
+ grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
+ timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
+
+ hlist_add_head_rcu(&grp_src->node, &pg->src_list);
+ pg->src_ents++;
+
+ return grp_src;
+}
+
+struct net_bridge_port_group *br_multicast_new_port_group(
+ struct net_bridge_port *port,
+ struct br_ip *group,
+ struct net_bridge_port_group __rcu *next,
+ unsigned char flags,
+ const unsigned char *src,
+ u8 filter_mode,
+ u8 rt_protocol)
+{
+ struct net_bridge_port_group *p;
+
+ p = kzalloc(sizeof(*p), GFP_ATOMIC);
+ if (unlikely(!p))
+ return NULL;
+
+ p->key.addr = *group;
+ p->key.port = port;
+ p->flags = flags;
+ p->filter_mode = filter_mode;
+ p->rt_protocol = rt_protocol;
+ p->eht_host_tree = RB_ROOT;
+ p->eht_set_tree = RB_ROOT;
+ p->mcast_gc.destroy = br_multicast_destroy_port_group;
+ INIT_HLIST_HEAD(&p->src_list);
+
+ if (!br_multicast_is_star_g(group) &&
+ rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
+ br_sg_port_rht_params)) {
+ kfree(p);
+ return NULL;
+ }
+
+ rcu_assign_pointer(p->next, next);
+ timer_setup(&p->timer, br_multicast_port_group_expired, 0);
+ timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
+ hlist_add_head(&p->mglist, &port->mglist);
+
+ if (src)
+ memcpy(p->eth_addr, src, ETH_ALEN);
+ else
+ eth_broadcast_addr(p->eth_addr);
+
+ return p;
+}
+
+void br_multicast_host_join(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);
+ 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);
+ }
+}
+
+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_bh(&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_bh(&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_bh(&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_bh(&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(&eth, 0, sizeof(eth));
+ eth.h_proto = htons(proto);
+
+ ret = br_multicast_querier_exists(&br->multicast_ctx, &eth, 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_irq(&cpu_stats->syncp);
+ memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
+ } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
+
+ mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
+ mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
+ mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
+ mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
+ mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
+ mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
+ mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
+ tdst.igmp_parse_errors += temp.igmp_parse_errors;
+
+ mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
+ mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
+ mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
+ mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
+ mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
+ tdst.mld_parse_errors += temp.mld_parse_errors;
+ }
+ memcpy(dest, &tdst, sizeof(*dest));
+}
+
+int br_mdb_hash_init(struct net_bridge *br)
+{
+ int err;
+
+ err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
+ if (err)
+ return err;
+
+ err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
+ if (err) {
+ rhashtable_destroy(&br->sg_port_tbl);
+ return err;
+ }
+
+ return 0;
+}
+
+void br_mdb_hash_fini(struct net_bridge *br)
+{
+ rhashtable_destroy(&br->sg_port_tbl);
+ rhashtable_destroy(&br->mdb_hash_tbl);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 23:47:33 +0000