diff options
Diffstat (limited to 'target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch')
| -rw-r--r-- | target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch b/target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch new file mode 100644 index 0000000..1ea6fc6 --- /dev/null +++ b/target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch @@ -0,0 +1,397 @@ +From: Felix Fietkau <nbd@openwrt.org> +Subject: [PATCH] bridge: multicast to unicast + +Implement optinal multicast->unicast conversion for igmp snooping +--- +--- a/include/linux/if_bridge.h ++++ b/include/linux/if_bridge.h +@@ -46,6 +46,7 @@ struct br_ip_list { + #define BR_LEARNING_SYNC BIT(9) + #define BR_PROXYARP_WIFI BIT(10) + #define BR_ISOLATE_MODE BIT(11) ++#define BR_MULTICAST_TO_UCAST BIT(12) + + extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *)); + +--- a/net/bridge/br_multicast.c ++++ b/net/bridge/br_multicast.c +@@ -635,7 +635,8 @@ struct net_bridge_port_group *br_multica + struct net_bridge_port *port, + struct br_ip *group, + struct net_bridge_port_group __rcu *next, +- unsigned char state) ++ unsigned char state, ++ const unsigned char *src) + { + struct net_bridge_port_group *p; + +@@ -650,12 +651,33 @@ struct net_bridge_port_group *br_multica + hlist_add_head(&p->mglist, &port->mglist); + setup_timer(&p->timer, br_multicast_port_group_expired, + (unsigned long)p); ++ if ((port->flags & BR_MULTICAST_TO_UCAST) && src) { ++ memcpy(p->eth_addr, src, ETH_ALEN); ++ p->unicast = true; ++ } + return p; + } + ++static bool br_port_group_equal(struct net_bridge_port_group *p, ++ struct net_bridge_port *port, ++ const unsigned char *src) ++{ ++ if (p->port != port) ++ return false; ++ ++ if (!p->unicast) ++ return true; ++ ++ if (!src) ++ return false; ++ ++ return ether_addr_equal(src, p->eth_addr); ++} ++ + static int br_multicast_add_group(struct net_bridge *br, + struct net_bridge_port *port, +- struct br_ip *group) ++ struct br_ip *group, ++ const unsigned char *src) + { + struct net_bridge_mdb_entry *mp; + struct net_bridge_port_group *p; +@@ -682,13 +704,13 @@ static int br_multicast_add_group(struct + for (pp = &mp->ports; + (p = mlock_dereference(*pp, br)) != NULL; + pp = &p->next) { +- if (p->port == port) ++ if (br_port_group_equal(p, port, src)) + goto found; + if ((unsigned long)p->port < (unsigned long)port) + break; + } + +- p = br_multicast_new_port_group(port, group, *pp, MDB_TEMPORARY); ++ p = br_multicast_new_port_group(port, group, *pp, MDB_TEMPORARY, src); + if (unlikely(!p)) + goto err; + rcu_assign_pointer(*pp, p); +@@ -707,7 +729,7 @@ err: + static int br_ip4_multicast_add_group(struct net_bridge *br, + struct net_bridge_port *port, + __be32 group, +- __u16 vid) ++ __u16 vid, const unsigned char *src) + { + struct br_ip br_group; + +@@ -718,14 +740,14 @@ static int br_ip4_multicast_add_group(st + br_group.proto = htons(ETH_P_IP); + br_group.vid = vid; + +- return br_multicast_add_group(br, port, &br_group); ++ return br_multicast_add_group(br, port, &br_group, src); + } + + #if IS_ENABLED(CONFIG_IPV6) + static int br_ip6_multicast_add_group(struct net_bridge *br, + struct net_bridge_port *port, + const struct in6_addr *group, +- __u16 vid) ++ __u16 vid, const unsigned char *src) + { + struct br_ip br_group; + +@@ -736,7 +758,7 @@ static int br_ip6_multicast_add_group(st + br_group.proto = htons(ETH_P_IPV6); + br_group.vid = vid; + +- return br_multicast_add_group(br, port, &br_group); ++ return br_multicast_add_group(br, port, &br_group, src); + } + #endif + +@@ -966,6 +988,7 @@ static int br_ip4_multicast_igmp3_report + struct sk_buff *skb, + u16 vid) + { ++ const unsigned char *src; + struct igmpv3_report *ih; + struct igmpv3_grec *grec; + int i; +@@ -1009,7 +1032,8 @@ static int br_ip4_multicast_igmp3_report + continue; + } + +- err = br_ip4_multicast_add_group(br, port, group, vid); ++ src = eth_hdr(skb)->h_source; ++ err = br_ip4_multicast_add_group(br, port, group, vid, src); + if (err) + break; + } +@@ -1023,6 +1047,7 @@ static int br_ip6_multicast_mld2_report( + struct sk_buff *skb, + u16 vid) + { ++ const unsigned char *src = eth_hdr(skb)->h_source; + struct icmp6hdr *icmp6h; + struct mld2_grec *grec; + int i; +@@ -1071,7 +1096,7 @@ static int br_ip6_multicast_mld2_report( + } + + err = br_ip6_multicast_add_group(br, port, &grec->grec_mca, +- vid); ++ vid, src); + if (err) + break; + } +@@ -1407,7 +1432,8 @@ br_multicast_leave_group(struct net_brid + struct net_bridge_port *port, + struct br_ip *group, + struct bridge_mcast_other_query *other_query, +- struct bridge_mcast_own_query *own_query) ++ struct bridge_mcast_own_query *own_query, ++ const unsigned char *src) + { + struct net_bridge_mdb_htable *mdb; + struct net_bridge_mdb_entry *mp; +@@ -1457,7 +1483,7 @@ br_multicast_leave_group(struct net_brid + for (pp = &mp->ports; + (p = mlock_dereference(*pp, br)) != NULL; + pp = &p->next) { +- if (p->port != port) ++ if (!br_port_group_equal(p, port, src)) + continue; + + rcu_assign_pointer(*pp, p->next); +@@ -1491,7 +1517,7 @@ br_multicast_leave_group(struct net_brid + for (p = mlock_dereference(mp->ports, br); + p != NULL; + p = mlock_dereference(p->next, br)) { +- if (p->port != port) ++ if (!br_port_group_equal(p, port, src)) + continue; + + if (!hlist_unhashed(&p->mglist) && +@@ -1509,8 +1535,8 @@ out: + + static void br_ip4_multicast_leave_group(struct net_bridge *br, + struct net_bridge_port *port, +- __be32 group, +- __u16 vid) ++ __be32 group, __u16 vid, ++ const unsigned char *src) + { + struct br_ip br_group; + struct bridge_mcast_own_query *own_query; +@@ -1525,14 +1551,14 @@ static void br_ip4_multicast_leave_group + br_group.vid = vid; + + br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, +- own_query); ++ own_query, src); + } + + #if IS_ENABLED(CONFIG_IPV6) + static void br_ip6_multicast_leave_group(struct net_bridge *br, + struct net_bridge_port *port, + const struct in6_addr *group, +- __u16 vid) ++ __u16 vid, const unsigned char *src) + { + struct br_ip br_group; + struct bridge_mcast_own_query *own_query; +@@ -1547,7 +1573,7 @@ static void br_ip6_multicast_leave_group + br_group.vid = vid; + + br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, +- own_query); ++ own_query, src); + } + #endif + +@@ -1556,6 +1582,7 @@ static int br_multicast_ipv4_rcv(struct + struct sk_buff *skb, + u16 vid) + { ++ const unsigned char *src; + struct sk_buff *skb2 = skb; + const struct iphdr *iph; + struct igmphdr *ih; +@@ -1624,12 +1651,13 @@ static int br_multicast_ipv4_rcv(struct + + BR_INPUT_SKB_CB(skb)->igmp = 1; + ih = igmp_hdr(skb2); ++ src = eth_hdr(skb)->h_source; + + switch (ih->type) { + case IGMP_HOST_MEMBERSHIP_REPORT: + case IGMPV2_HOST_MEMBERSHIP_REPORT: + BR_INPUT_SKB_CB(skb)->mrouters_only = 1; +- err = br_ip4_multicast_add_group(br, port, ih->group, vid); ++ err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); + break; + case IGMPV3_HOST_MEMBERSHIP_REPORT: + err = br_ip4_multicast_igmp3_report(br, port, skb2, vid); +@@ -1638,7 +1666,7 @@ static int br_multicast_ipv4_rcv(struct + err = br_ip4_multicast_query(br, port, skb2, vid); + break; + case IGMP_HOST_LEAVE_MESSAGE: +- br_ip4_multicast_leave_group(br, port, ih->group, vid); ++ br_ip4_multicast_leave_group(br, port, ih->group, vid, src); + break; + } + +@@ -1656,6 +1684,7 @@ static int br_multicast_ipv6_rcv(struct + struct sk_buff *skb, + u16 vid) + { ++ const unsigned char *src; + struct sk_buff *skb2; + const struct ipv6hdr *ip6h; + u8 icmp6_type; +@@ -1763,9 +1792,11 @@ static int br_multicast_ipv6_rcv(struct + err = -EINVAL; + goto out; + } ++ src = eth_hdr(skb)->h_source; + mld = (struct mld_msg *)skb_transport_header(skb2); + BR_INPUT_SKB_CB(skb)->mrouters_only = 1; +- err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid); ++ err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, ++ src); + break; + } + case ICMPV6_MLD2_REPORT: +@@ -1781,8 +1812,9 @@ static int br_multicast_ipv6_rcv(struct + err = -EINVAL; + goto out; + } ++ src = eth_hdr(skb)->h_source; + mld = (struct mld_msg *)skb_transport_header(skb2); +- br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid); ++ br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); + } + } + +--- a/net/bridge/br_private.h ++++ b/net/bridge/br_private.h +@@ -113,6 +113,9 @@ struct net_bridge_port_group { + struct timer_list timer; + struct br_ip addr; + unsigned char state; ++ ++ unsigned char eth_addr[ETH_ALEN]; ++ bool unicast; + }; + + struct net_bridge_mdb_entry +@@ -481,7 +484,8 @@ void br_multicast_free_pg(struct rcu_hea + 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 state); ++ unsigned char state, ++ const unsigned char *src); + void br_mdb_init(void); + void br_mdb_uninit(void); + void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, +--- a/net/bridge/br_mdb.c ++++ b/net/bridge/br_mdb.c +@@ -343,7 +343,7 @@ static int br_mdb_add_group(struct net_b + break; + } + +- p = br_multicast_new_port_group(port, group, *pp, state); ++ p = br_multicast_new_port_group(port, group, *pp, state, NULL); + if (unlikely(!p)) + return -ENOMEM; + rcu_assign_pointer(*pp, p); +--- a/net/bridge/br_forward.c ++++ b/net/bridge/br_forward.c +@@ -170,6 +170,34 @@ out: + return p; + } + ++static struct net_bridge_port *maybe_deliver_addr( ++ struct net_bridge_port *prev, struct net_bridge_port *p, ++ struct sk_buff *skb, const unsigned char *addr, ++ void (*__packet_hook)(const struct net_bridge_port *p, ++ struct sk_buff *skb)) ++{ ++ struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev; ++ const unsigned char *src = eth_hdr(skb)->h_source; ++ ++ if (!should_deliver(p, skb)) ++ return prev; ++ ++ /* Even with hairpin, no soliloquies - prevent breaking IPv6 DAD */ ++ if (skb->dev == p->dev && ether_addr_equal(src, addr)) ++ return prev; ++ ++ skb = skb_copy(skb, GFP_ATOMIC); ++ if (!skb) { ++ dev->stats.tx_dropped++; ++ return prev; ++ } ++ ++ memcpy(eth_hdr(skb)->h_dest, addr, ETH_ALEN); ++ __packet_hook(p, skb); ++ ++ return prev; ++} ++ + /* called under bridge lock */ + static void br_flood(struct net_bridge *br, struct sk_buff *skb, + struct sk_buff *skb0, +@@ -242,6 +270,7 @@ static void br_multicast_flood(struct ne + struct net_bridge_port *prev = NULL; + struct net_bridge_port_group *p; + struct hlist_node *rp; ++ const unsigned char *addr; + + rp = rcu_dereference(hlist_first_rcu(&br->router_list)); + p = mdst ? rcu_dereference(mdst->ports) : NULL; +@@ -252,10 +281,19 @@ static void br_multicast_flood(struct ne + rport = rp ? hlist_entry(rp, struct net_bridge_port, rlist) : + NULL; + +- port = (unsigned long)lport > (unsigned long)rport ? +- lport : rport; +- +- prev = maybe_deliver(prev, port, skb, __packet_hook); ++ if ((unsigned long)lport > (unsigned long)rport) { ++ port = lport; ++ addr = p->unicast ? p->eth_addr : NULL; ++ } else { ++ port = rport; ++ addr = NULL; ++ } ++ ++ if (addr) ++ prev = maybe_deliver_addr(prev, port, skb, addr, ++ __packet_hook); ++ else ++ prev = maybe_deliver(prev, port, skb, __packet_hook); + if (IS_ERR(prev)) + goto out; + +--- a/net/bridge/br_sysfs_if.c ++++ b/net/bridge/br_sysfs_if.c +@@ -204,6 +204,7 @@ static BRPORT_ATTR(multicast_router, S_I + store_multicast_router); + + BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE); ++BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UCAST); + #endif + + static const struct brport_attribute *brport_attrs[] = { +@@ -230,6 +231,7 @@ static const struct brport_attribute *br + #ifdef CONFIG_BRIDGE_IGMP_SNOOPING + &brport_attr_multicast_router, + &brport_attr_multicast_fast_leave, ++ &brport_attr_multicast_to_unicast, + #endif + &brport_attr_proxyarp, + &brport_attr_proxyarp_wifi, |