cregit-Linux how code gets into the kernel

Release 4.11 net/bridge/br_multicast.c

Directory: net/bridge
/*
 * Bridge multicast support.
 *
 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 */

#include <linux/err.h>
#include <linux/export.h>
#include <linux/if_ether.h>
#include <linux/igmp.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 <net/ipv6.h>
#include <net/mld.h>
#include <net/ip6_checksum.h>
#include <net/addrconf.h>
#endif

#include "br_private.h"

static void br_multicast_start_querier(struct net_bridge *br,
				       struct bridge_mcast_own_query *query);
static void br_multicast_add_router(struct net_bridge *br,
				    struct net_bridge_port *port);
static void br_ip4_multicast_leave_group(struct net_bridge *br,
					 struct net_bridge_port *port,
					 __be32 group,
					 __u16 vid,
					 const unsigned char *src);

static void __del_port_router(struct net_bridge_port *p);
#if IS_ENABLED(CONFIG_IPV6)
static void br_ip6_multicast_leave_group(struct net_bridge *br,
					 struct net_bridge_port *port,
					 const struct in6_addr *group,
					 __u16 vid, const unsigned char *src);
#endif

unsigned int br_mdb_rehash_seq;


static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) { if (a->proto != b->proto) return 0; if (a->vid != b->vid) return 0; switch (a->proto) { case htons(ETH_P_IP): return a->u.ip4 == b->u.ip4; #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); #endif } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明9084.11%240.00%
Vlad Yasevich1312.15%120.00%
Herbert Xu32.80%120.00%
Eric Dumazet10.93%120.00%
Total107100.00%5100.00%


static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip, __u16 vid) { return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2764.29%125.00%
Vlad Yasevich1023.81%125.00%
Hideaki Yoshifuji / 吉藤英明49.52%125.00%
Eric Dumazet12.38%125.00%
Total42100.00%4100.00%

#if IS_ENABLED(CONFIG_IPV6)
static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, const struct in6_addr *ip, __u16 vid) { return jhash_2words(ipv6_addr_hash(ip), vid, mdb->secret) & (mdb->max - 1); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明2454.55%133.33%
Herbert Xu1227.27%133.33%
Vlad Yasevich818.18%133.33%
Total44100.00%3100.00%

#endif
static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, struct br_ip *ip) { switch (ip->proto) { case htons(ETH_P_IP): return __br_ip4_hash(mdb, ip->u.ip4, ip->vid); #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid); #endif } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7288.89%250.00%
Vlad Yasevich89.88%125.00%
Eric Dumazet11.23%125.00%
Total81100.00%4100.00%


static struct net_bridge_mdb_entry *__br_mdb_ip_get( struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash) { struct net_bridge_mdb_entry *mp; hlist_for_each_entry_rcu(mp, &mdb->mhash[hash], hlist[mdb->ver]) { if (br_ip_equal(&mp->addr, dst)) return mp; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4583.33%266.67%
Hideaki Yoshifuji / 吉藤英明916.67%133.33%
Total54100.00%3100.00%


struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst) { if (!mdb) return NULL; return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst)); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu40100.00%1100.00%
Total40100.00%1100.00%


static struct net_bridge_mdb_entry *br_mdb_ip4_get( struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid) { struct br_ip br_dst; br_dst.u.ip4 = dst; br_dst.proto = htons(ETH_P_IP); br_dst.vid = vid; return br_mdb_ip_get(mdb, &br_dst); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明2952.73%120.00%
Herbert Xu1730.91%360.00%
Vlad Yasevich916.36%120.00%
Total55100.00%5100.00%

#if IS_ENABLED(CONFIG_IPV6)
static struct net_bridge_mdb_entry *br_mdb_ip6_get( struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst, __u16 vid) { struct br_ip br_dst; br_dst.u.ip6 = *dst; br_dst.proto = htons(ETH_P_IPV6); br_dst.vid = vid; return br_mdb_ip_get(mdb, &br_dst); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4779.66%125.00%
Vlad Yasevich915.25%125.00%
Alexey Dobriyan23.39%125.00%
Herbert Xu11.69%125.00%
Total59100.00%4100.00%

#endif
struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, struct sk_buff *skb, u16 vid) { struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb); struct br_ip ip; if (br->multicast_disabled) return NULL; if (BR_INPUT_SKB_CB(skb)->igmp) return NULL; ip.proto = skb->protocol; ip.vid = vid; switch (skb->protocol) { case htons(ETH_P_IP): ip.u.ip4 = ip_hdr(skb)->daddr; break; #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): ip.u.ip6 = ipv6_hdr(skb)->daddr; break; #endif default: return NULL; } return br_mdb_ip_get(mdb, &ip); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明6747.86%228.57%
Herbert Xu5942.14%114.29%
Américo Wang96.43%114.29%
Eric Dumazet42.86%228.57%
Alexey Dobriyan10.71%114.29%
Total140100.00%7100.00%


static void br_mdb_free(struct rcu_head *head) { struct net_bridge_mdb_htable *mdb = container_of(head, struct net_bridge_mdb_htable, rcu); struct net_bridge_mdb_htable *old = mdb->old; mdb->old = NULL; kfree(old->mhash); kfree(old); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu53100.00%1100.00%
Total53100.00%1100.00%


static int br_mdb_copy(struct net_bridge_mdb_htable *new, struct net_bridge_mdb_htable *old, int elasticity) { struct net_bridge_mdb_entry *mp; int maxlen; int len; int i; for (i = 0; i < old->max; i++) hlist_for_each_entry(mp, &old->mhash[i], hlist[old->ver]) hlist_add_head(&mp->hlist[new->ver], &new->mhash[br_ip_hash(new, &mp->addr)]); if (!elasticity) return 0; maxlen = 0; for (i = 0; i < new->max; i++) { len = 0; hlist_for_each_entry(mp, &new->mhash[i], hlist[new->ver]) len++; if (len > maxlen) maxlen = len; } return maxlen > elasticity ? -EINVAL : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu14899.33%150.00%
Hideaki Yoshifuji / 吉藤英明10.67%150.00%
Total149100.00%2100.00%


void br_multicast_free_pg(struct rcu_head *head) { struct net_bridge_port_group *p = container_of(head, struct net_bridge_port_group, rcu); kfree(p); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu30100.00%1100.00%
Total30100.00%1100.00%


static void br_multicast_free_group(struct rcu_head *head) { struct net_bridge_mdb_entry *mp = container_of(head, struct net_bridge_mdb_entry, rcu); kfree(mp); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu31100.00%1100.00%
Total31100.00%1100.00%


static void br_multicast_group_expired(unsigned long data) { struct net_bridge_mdb_entry *mp = (void *)data; struct net_bridge *br = mp->br; struct net_bridge_mdb_htable *mdb; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || timer_pending(&mp->timer)) goto out; mp->mglist = false; if (mp->ports) goto out; mdb = mlock_dereference(br->mdb, br); hlist_del_rcu(&mp->hlist[mdb->ver]); mdb->size--; call_rcu_bh(&mp->rcu, br_multicast_free_group); out: spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu12396.09%266.67%
Eric Dumazet53.91%133.33%
Total128100.00%3100.00%


static void br_multicast_del_pg(struct net_bridge *br, struct net_bridge_port_group *pg) { struct net_bridge_mdb_htable *mdb; struct net_bridge_mdb_entry *mp; struct net_bridge_port_group *p; struct net_bridge_port_group __rcu **pp; mdb = mlock_dereference(br->mdb, br); mp = br_mdb_ip_get(mdb, &pg->addr); if (WARN_ON(!mp)) return; for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; pp = &p->next) { if (p != pg) continue; rcu_assign_pointer(*pp, p->next); hlist_del_init(&p->mglist); del_timer(&p->timer); br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, p->flags); call_rcu_bh(&p->rcu, br_multicast_free_pg); if (!mp->ports && !mp->mglist && netif_running(br->dev)) mod_timer(&mp->timer, jiffies); return; } WARN_ON(1); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu15677.23%228.57%
Eric Dumazet199.41%114.29%
Elad Raz115.45%114.29%
Nikolay Aleksandrov115.45%114.29%
Stephen Hemminger41.98%114.29%
Hideaki Yoshifuji / 吉藤英明10.50%114.29%
Total202100.00%7100.00%


static void br_multicast_port_group_expired(unsigned long data) { struct net_bridge_port_group *pg = (void *)data; struct net_bridge *br = pg->port->br; 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; br_multicast_del_pg(br, pg); out: spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu8693.48%133.33%
Américo Wang44.35%133.33%
Elad Raz22.17%133.33%
Total92100.00%3100.00%


static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, int elasticity) { struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1); struct net_bridge_mdb_htable *mdb; int err; mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); if (!mdb) return -ENOMEM; mdb->max = max; mdb->old = old; mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC); if (!mdb->mhash) { kfree(mdb); return -ENOMEM; } mdb->size = old ? old->size : 0; mdb->ver = old ? old->ver ^ 1 : 0; if (!old || elasticity) get_random_bytes(&mdb->secret, sizeof(mdb->secret)); else mdb->secret = old->secret; if (!old) goto out; err = br_mdb_copy(mdb, old, elasticity); if (err) { kfree(mdb->mhash); kfree(mdb); return err; } br_mdb_rehash_seq++; call_rcu_bh(&mdb->rcu, br_mdb_free); out: rcu_assign_pointer(*mdbp, mdb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu22596.15%133.33%
Eric Dumazet62.56%133.33%
Américo Wang31.28%133.33%
Total234100.00%3100.00%


static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, __be32 group, u8 *igmp_type) { struct igmpv3_query *ihv3; size_t igmp_hdr_size; struct sk_buff *skb; struct igmphdr *ih; struct ethhdr *eth; struct iphdr *iph; igmp_hdr_size = sizeof(*ih); if (br->multicast_igmp_version == 3) igmp_hdr_size = sizeof(*ihv3); skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + igmp_hdr_size + 4); if (!skb) goto out; skb->protocol = htons(ETH_P_IP); skb_reset_mac_header(skb); eth = eth_hdr(skb); ether_addr_copy(eth->h_source, br->dev->dev_addr); eth->h_dest[0] = 1; eth->h_dest[1] = 0; eth->h_dest[2] = 0x5e; eth->h_dest[3] = 0; eth->h_dest[4] = 0; eth->h_dest[5] = 1; eth->h_proto = htons(ETH_P_IP); skb_put(skb, sizeof(*eth)); skb_set_network_header(skb, skb->len); iph = ip_hdr(skb); iph->version = 4; iph->ihl = 6; iph->tos = 0xc0; iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); iph->id = 0; iph->frag_off = htons(IP_DF); iph->ttl = 1; iph->protocol = IPPROTO_IGMP; iph->saddr = br->multicast_query_use_ifaddr ? inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); ((u8 *)&iph[1])[0] = IPOPT_RA; ((u8 *)&iph[1])[1] = 4; ((u8 *)&iph[1])[2] = 0; ((u8 *)&iph[1])[3] = 0; ip_send_check(iph); skb_put(skb, 24); skb_set_transport_header(skb, skb->len); *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; switch (br->multicast_igmp_version) { case 2: ih = igmp_hdr(skb); ih->type = IGMP_HOST_MEMBERSHIP_QUERY; ih->code = (group ? br->multicast_last_member_interval : br->multicast_query_response_interval) / (HZ / IGMP_TIMER_SCALE); ih->group = group; ih->csum = 0; ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); break; case 3: ihv3 = igmpv3_query_hdr(skb); ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; ihv3->code = (group ? br->multicast_last_member_interval : br->multicast_query_response_interval) / (HZ / IGMP_TIMER_SCALE); ihv3->group = group; ihv3->qqic = br->multicast_query_interval / HZ; ihv3->nsrcs = 0; ihv3->resv = 0; ihv3->suppress = 0; ihv3->qrv = 2; ihv3->csum = 0; ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); break; } skb_put(skb, igmp_hdr_size); __skb_pull(skb, sizeof(*eth)); out: return skb; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu44471.61%116.67%
Nikolay Aleksandrov15925.65%233.33%
Américo Wang152.42%116.67%
Joe Perches10.16%116.67%
Hideaki Yoshifuji / 吉藤英明10.16%116.67%
Total620100.00%6100.00%

#if IS_ENABLED(CONFIG_IPV6)
static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, const struct in6_addr *grp, u8 *igmp_type) { struct mld2_query *mld2q; unsigned long interval; struct ipv6hdr *ip6h; struct mld_msg *mldq; size_t mld_hdr_size; struct sk_buff *skb; struct ethhdr *eth; u8 *hopopt; mld_hdr_size = sizeof(*mldq); if (br->multicast_mld_version == 2) mld_hdr_size = sizeof(*mld2q); skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size); if (!skb) goto out; skb->protocol = htons(ETH_P_IPV6); /* Ethernet header */ skb_reset_mac_header(skb); eth = eth_hdr(skb); ether_addr_copy(eth->h_source, br->dev->dev_addr); eth->h_proto = htons(ETH_P_IPV6); skb_put(skb, sizeof(*eth)); /* IPv6 header + HbH option */ skb_set_network_header(skb, skb->len); ip6h = ipv6_hdr(skb); *(__force __be32 *)ip6h = htonl(0x60000000); ip6h->payload_len = htons(8 + mld_hdr_size); ip6h->nexthdr = IPPROTO_HOPOPTS; ip6h->hop_limit = 1; ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, &ip6h->saddr)) { kfree_skb(skb); br->has_ipv6_addr = 0; return NULL; } br->has_ipv6_addr = 1; 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(grp) ? br->multicast_query_response_interval : br->multicast_last_member_interval; *igmp_type = ICMPV6_MGM_QUERY; switch (br->multicast_mld_version) { case 1: mldq = (struct mld_msg *)icmp6_hdr(skb); mldq->mld_type = ICMPV6_MGM_QUERY; mldq->mld_code = 0; mldq->mld_cksum = 0; mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); mldq->mld_reserved = 0; mldq->mld_mca = *grp; mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, sizeof(*mldq), IPPROTO_ICMPV6, csum_partial(mldq, sizeof(*mldq), 0)); 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 = 0; mld2q->mld2q_qrv = 2; mld2q->mld2q_nsrcs = 0; mld2q->mld2q_qqic = br->multicast_query_interval / HZ; mld2q->mld2q_mca = *grp; mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, sizeof(*mld2q), IPPROTO_ICMPV6, csum_partial(mld2q, sizeof(*mld2q), 0)); break; } skb_put(skb, mld_hdr_size); __skb_pull(skb, sizeof(*eth)); out: return skb; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明32747.32%211.76%
Nikolay Aleksandrov20729.96%211.76%
Herbert Xu689.84%15.88%
Linus Lüssing537.67%423.53%
Ulrich Weber121.74%15.88%
daniel121.74%15.88%
Eldad Zack40.58%15.88%
David L Stevens30.43%15.88%
Alexey Dobriyan20.29%15.88%
Joe Perches10.14%15.88%
Eric Dumazet10.14%15.88%
Lance Richardson10.14%15.88%
Total691100.00%17100.00%

#endif
static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, struct br_ip *addr, u8 *igmp_type) { switch (addr->proto) { case htons(ETH_P_IP): return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): return br_ip6_multicast_alloc_query(br, &addr->u.ip6, igmp_type); #endif } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7389.02%133.33%
Nikolay Aleksandrov89.76%133.33%
Eric Dumazet11.22%133.33%
Total82100.00%3100.00%


static struct net_bridge_mdb_entry *br_multicast_get_group( struct net_bridge *br, struct net_bridge_port *port, struct br_ip *group, int hash) { struct net_bridge_mdb_htable *mdb; struct net_bridge_mdb_entry *mp; unsigned int count = 0; unsigned int max; int elasticity; int err; mdb = rcu_dereference_protected(br->mdb, 1); hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) { count++; if (unlikely(br_ip_equal(group, &mp->addr))) return mp; } elasticity = 0; max = mdb->max; if (unlikely(count > br->hash_elasticity && count)) { if (net_ratelimit()) br_info(br, "Multicast hash table " "chain limit reached: %s\n", port ? port->dev->name : br->dev->name); elasticity = br->hash_elasticity; } if (mdb->size >= max) { max *= 2; if (unlikely(max > br->hash_max)) { br_warn(br, "Multicast hash table maximum of %d " "reached, disabling snooping: %s\n", br->hash_max, port ? port->dev->name : br->dev->name); err = -E2BIG; disable: br->multicast_disabled = 1; goto err; } } if (max > mdb->max || elasticity) { if (mdb->old) { if (net_ratelimit()) br_info(br, "Multicast hash table " "on fire: %s\n", port ? port->dev->name : br->dev->name); err = -EEXIST; goto err; } err = br_mdb_rehash(&br->mdb, max, elasticity); if (err) { br_warn(br, "Cannot rehash multicast " "hash table, disabling snooping: %s, %d, %d\n", port ? port->dev->name : br->dev->name, mdb->size, err); goto disable; } err = -EAGAIN; goto err; } return NULL; err: mp = ERR_PTR(err); return mp; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明31690.29%120.00%
Stephen Hemminger144.00%120.00%
Eric Dumazet133.71%240.00%
Thomas Graf72.00%120.00%
Total350100.00%5100.00%


struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *p, struct br_ip *group) { struct net_bridge_mdb_htable *mdb; struct net_bridge_mdb_entry *mp; int hash; int err; mdb = rcu_dereference_protected(br->mdb, 1); if (!mdb) { err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0); if (err) return ERR_PTR(err); goto rehash; } hash = br_ip_hash(mdb, group); mp = br_multicast_get_group(br, p, group, hash); switch (PTR_ERR(mp)) { case 0: break; case -EAGAIN: rehash: mdb = rcu_dereference_protected(br->mdb, 1); hash = br_ip_hash(mdb, group); break; default: goto out; } mp = kzalloc(sizeof(*mp), GFP_ATOMIC); if (unlikely(!mp)) return ERR_PTR(-ENOMEM); mp->br = br; mp->addr = *group; setup_timer(&mp->timer, br_multicast_group_expired, (unsigned long)mp); hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]); mdb->size++; out: return mp; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明17172.15%116.67%
Eric Dumazet3213.50%233.33%
Tobias Klauser208.44%116.67%
Herbert Xu125.06%116.67%
Nikolay Aleksandrov20.84%116.67%
Total237100.00%6100.00%


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) { struct net_bridge_port_group *p; p = kzalloc(sizeof(*p), GFP_ATOMIC); if (unlikely(!p)) return NULL; p->addr = *group; p->port = port; p->flags = flags; rcu_assign_pointer(p->next, next); hlist_add_head(&p->mglist, &port->mglist); setup_timer(&p->timer, br_multicast_port_group_expired, (unsigned long)p); if (src) memcpy(p->eth_addr, src, ETH_ALEN); else memset(p->eth_addr, 0xff, ETH_ALEN); return p; }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang10872.48%240.00%
Felix Fietkau3322.15%120.00%
Stephen Hemminger53.36%120.00%
Elad Raz32.01%120.00%
Total149100.00%5100.00%


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 (!(port->flags & BR_MULTICAST_TO_UNICAST)) return true; return ether_addr_equal(src, p->eth_addr); }

Contributors

PersonTokensPropCommitsCommitProp
Felix Fietkau57100.00%1100.00%
Total57100.00%1100.00%


static int br_multicast_add_group(struct net_bridge *br, struct net_bridge_port *port, struct br_ip *group, const unsigned char *src) { struct net_bridge_port_group __rcu **pp; struct net_bridge_port_group *p; struct net_bridge_mdb_entry *mp; unsigned long now = jiffies; int err; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || (port && port->state == BR_STATE_DISABLED)) goto out; mp = br_multicast_new_group(br, port, group); err = PTR_ERR(mp); if (IS_ERR(mp)) goto err; if (!port) { mp->mglist = true; mod_timer(&mp->timer, now + br->multicast_membership_interval); goto out; } for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; pp = &p->next) { if (br_port_group_equal(p, port, src)) goto found; if ((unsigned long)p->port < (unsigned long)port) break; } p = br_multicast_new_port_group(port, group, *pp, 0, src); if (unlikely(!p)) goto err; rcu_assign_pointer(*pp, p); br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); found: mod_timer(&p->timer, now + br->multicast_membership_interval); out: err = 0; err: spin_unlock(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明15754.14%214.29%
Herbert Xu4615.86%321.43%
Linus Lüssing3712.76%17.14%
Américo Wang175.86%321.43%
Felix Fietkau144.83%17.14%
Eric Dumazet72.41%17.14%
Nikolay Aleksandrov62.07%17.14%
Elad Raz62.07%214.29%
Total290100.00%14100.00%


static int br_ip4_multicast_add_group(struct net_bridge *br, struct net_bridge_port *port, __be32 group, __u16 vid, const unsigned char *src) { struct br_ip br_group; if (ipv4_is_local_multicast(group)) return 0; br_group.u.ip4 = group; br_group.proto = htons(ETH_P_IP); br_group.vid = vid; return br_multicast_add_group(br, port, &br_group, src); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3139.74%240.00%
Herbert Xu3038.46%120.00%
Vlad Yasevich911.54%120.00%
Felix Fietkau810.26%120.00%
Total78100.00%5100.00%

#if IS_ENABLED(CONFIG_IPV6)
static int br_ip6_multicast_add_group(struct net_bridge *br, struct net_bridge_port *port, const struct in6_addr *group, __u16 vid, const unsigned char *src) { struct br_ip br_group; if (ipv6_addr_is_ll_all_nodes(group)) return 0; br_group.u.ip6 = *group; br_group.proto = htons(ETH_P_IPV6); br_group.vid = vid; return br_multicast_add_group(br, port, &br_group, src); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5465.85%114.29%
Vlad Yasevich910.98%114.29%
Felix Fietkau89.76%114.29%
Herbert Xu78.54%114.29%
Alexey Dobriyan22.44%114.29%
Linus Lüssing22.44%228.57%
Total82100.00%7100.00%

#endif
static void br_multicast_router_expired(unsigned long data) { struct net_bridge_port *port = (void *)data; struct net_bridge *br = port->br; spin_lock(&br->multicast_lock); if (port->multicast_router == MDB_RTR_TYPE_DISABLED || port->multicast_router == MDB_RTR_TYPE_PERM || timer_pending(&port->multicast_router_timer)) goto out; __del_port_router(port); out: spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4658.97%120.00%
Herbert Xu1924.36%120.00%
Nikolay Aleksandrov810.26%120.00%
Satish Ashok45.13%120.00%
Nogah Frankel11.28%120.00%
Total78100.00%5100.00%


static void br_multicast_local_router_expired(unsigned long data) { }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明9100.00%1100.00%
Total9100.00%1100.00%


static void br_multicast_querier_expired(struct net_bridge *br, struct bridge_mcast_own_query *query) { spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || br->multicast_disabled) goto out; br_multicast_start_querier(br, query); out: spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4984.48%250.00%
Linus Lüssing915.52%250.00%
Total58100.00%4100.00%


static void br_ip4_multicast_querier_expired(unsigned long data) { struct net_bridge *br = (void *)data; br_multicast_querier_expired(br, &br->ip4_own_query); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing31100.00%2100.00%
Total31100.00%2100.00%

#if IS_ENABLED(CONFIG_IPV6)
static void br_ip6_multicast_querier_expired(unsigned long data) { struct net_bridge *br = (void *)data; br_multicast_querier_expired(br, &br->ip6_own_query); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing31100.00%2100.00%
Total31100.00%2100.00%

#endif
static void br_multicast_select_own_querier(struct net_bridge *br, struct br_ip *ip, struct sk_buff *skb) { if (ip->proto == htons(ETH_P_IP)) br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; #if IS_ENABLED(CONFIG_IPV6) else br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing75100.00%1100.00%
Total75100.00%1100.00%


static void __br_multicast_send_query(struct net_bridge *br, struct net_bridge_port *port, struct br_ip *ip) { struct sk_buff *skb; u8 igmp_type; skb = br_multicast_alloc_query(br, ip, &igmp_type); if (!skb) return; if (port) { skb->dev = port->dev; br_multicast_count(br, port, skb, igmp_type, BR_MCAST_DIR_TX); NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, dev_net(port->dev), NULL, skb, NULL, skb->dev, br_dev_queue_push_xmit); } else { br_multicast_select_own_querier(br, ip, skb); br_multicast_count(br, port, skb, igmp_type, BR_MCAST_DIR_RX); netif_rx(skb); } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4232.31%112.50%
Herbert Xu3426.15%112.50%
Nikolay Aleksandrov3224.62%112.50%
Linus Lüssing129.23%225.00%
Eric W. Biedermann75.38%112.50%
David S. Miller21.54%112.50%
Patrick McHardy10.77%112.50%
Total130100.00%8100.00%


static void br_multicast_send_query(struct net_bridge *br, struct net_bridge_port *port, struct bridge_mcast_own_query *own_query) { struct bridge_mcast_other_query *other_query = NULL; struct br_ip br_group; unsigned long time; if (!netif_running(br->dev) || br->multicast_disabled || !br->multicast_querier) return; memset(&br_group.u, 0, sizeof(br_group.u)); if (port ? (own_query == &port->ip4_own_query) : (own_query == &br->ip4_own_query)) { other_query = &br->ip4_other_query; br_group.proto = htons(ETH_P_IP); #if IS_ENABLED(CONFIG_IPV6) } else { other_query = &br->ip6_other_query; br_group.proto = htons(ETH_P_IPV6); #endif } if (!other_query || timer_pending(&other_query->timer)) return; __br_multicast_send_query(br, port, &br_group); time = jiffies; time += own_query->startup_sent < br->multicast_startup_query_count ? br->multicast_startup_query_interval : br->multicast_query_interval; mod_timer(&own_query->timer, time); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing7337.24%228.57%
Hideaki Yoshifuji / 吉藤英明6935.20%114.29%
Herbert Xu4522.96%228.57%
Nikolay Aleksandrov84.08%114.29%
Eric Dumazet10.51%114.29%
Total196100.00%7100.00%


static void br_multicast_port_query_expired(struct net_bridge_port *port, struct bridge_mcast_own_query *query) { struct net_bridge *br = port->br; spin_lock(&br->multicast_lock); if (port->state == BR_STATE_DISABLED || port->state == BR_STATE_BLOCKING) goto out; if (query->startup_sent < br->multicast_startup_query_count) query->startup_sent++; br_multicast_send_query(port->br, port, query); out: spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4552.33%125.00%
Herbert Xu2933.72%125.00%
Linus Lüssing1213.95%250.00%
Total86100.00%4100.00%


static void br_ip4_multicast_port_query_expired(unsigned long data) { struct net_bridge_port *port = (void *)data; br_multicast_port_query_expired(port, &port->ip4_own_query); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing1651.61%250.00%
Herbert Xu1341.94%125.00%
Hideaki Yoshifuji / 吉藤英明26.45%125.00%
Total31100.00%4100.00%

#if IS_ENABLED(CONFIG_IPV6)
static void br_ip6_multicast_port_query_expired(unsigned long data) { struct net_bridge_port *port = (void *)data; br_multicast_port_query_expired(port, &port->ip6_own_query); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing3096.77%266.67%
Hideaki Yoshifuji / 吉藤英明13.23%133.33%
Total31100.00%3100.00%

#endif
static void br_mc_disabled_update(struct net_device *dev, bool value) { struct switchdev_attr attr = { .orig_dev = dev, .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, .flags = SWITCHDEV_F_DEFER, .u.mc_disabled = value, }; switchdev_port_attr_set(dev, &attr); }

Contributors

PersonTokensPropCommitsCommitProp
Nogah Frankel50100.00%1100.00%
Total50100.00%1100.00%


int br_multicast_add_port(struct net_bridge_port *port) { port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; setup_timer(&port->multicast_router_timer, br_multicast_router_expired, (unsigned long)port); setup_timer(&port->ip4_own_query.timer, br_ip4_multicast_port_query_expired, (unsigned long)port); #if IS_ENABLED(CONFIG_IPV6) setup_timer(&port->ip6_own_query.timer, br_ip6_multicast_port_query_expired, (unsigned long)port); #endif br_mc_disabled_update(port->dev, port->br->multicast_disabled); port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); if (!port->mcast_stats) return -ENOMEM; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing5952.21%228.57%
Nikolay Aleksandrov2623.01%228.57%
Nogah Frankel1311.50%114.29%
Herbert Xu1311.50%114.29%
Hideaki Yoshifuji / 吉藤英明21.77%114.29%
Total113100.00%7100.00%


void br_multicast_del_port(struct net_bridge_port *port) { struct net_bridge *br = port->br; struct net_bridge_port_group *pg; 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_del_pg(br, pg); spin_unlock_bh(&br->multicast_lock); del_timer_sync(&port->multicast_router_timer); free_percpu(port->mcast_stats); }

Contributors

PersonTokensPropCommitsCommitProp
Satish Ashok5367.95%120.00%
Linus Lüssing810.26%120.00%
Nikolay Aleksandrov78.97%120.00%
Hideaki Yoshifuji / 吉藤英明78.97%120.00%
Herbert Xu33.85%120.00%
Total78100.00%5100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2042.55%125.00%
Linus Lüssing1940.43%250.00%
Hideaki Yoshifuji / 吉藤英明817.02%125.00%
Total47100.00%4100.00%


static void __br_multicast_enable_port(struct net_bridge_port *port) { struct net_bridge *br = port->br; if (br->multicast_disabled || !netif_running(br->dev)) return; br_multicast_enable(&port->ip4_own_query); #if IS_ENABLED(CONFIG_IPV6) br_multicast_enable(&port->ip6_own_query); #endif if (port->multicast_router == MDB_RTR_TYPE_PERM && hlist_unhashed(&port->rlist)) br_multicast_add_router(br, port); }

Contributors

PersonTokensPropCommitsCommitProp
Satish Ashok2226.83%114.29%
Hideaki Yoshifuji / 吉藤英明2024.39%114.29%
Linus Lüssing2024.39%228.57%
Herbert Xu1518.29%114.29%
Nikolay Aleksandrov56.10%228.57%
Total82100.00%7100.00%


void br_multicast_enable_port(struct net_bridge_port *port) { struct net_bridge *br = port->br; spin_lock(&br->multicast_lock); __br_multicast_enable_port(port); spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov3177.50%133.33%
Herbert Xu512.50%133.33%
Hideaki Yoshifuji / 吉藤英明410.00%133.33%
Total40100.00%3100.00%


void br_multicast_disable_port(struct net_bridge_port *port) { struct net_bridge *br = port->br; struct net_bridge_port_group *pg; struct hlist_node *n; spin_lock(&br->multicast_lock); hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) br_multicast_del_pg(br, pg); __del_port_router(port); del_timer(&port->multicast_router_timer); del_timer(&port->ip4_own_query.timer); #if IS_ENABLED(CONFIG_IPV6) del_timer(&port->ip6_own_query.timer); #endif spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu5043.86%112.50%
Hideaki Yoshifuji / 吉藤英明2723.68%112.50%
Linus Lüssing2118.42%225.00%
Satish Ashok97.89%225.00%
Elad Raz65.26%112.50%
Nogah Frankel10.88%112.50%
Total114100.00%8100.00%


static int br_ip4_multicast_igmp3_report(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { const unsigned char *src; struct igmpv3_report *ih; struct igmpv3_grec *grec; int i; int len; int num; int type; int err = 0; __be32 group; 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 (!pskb_may_pull(skb, len)) return -EINVAL; grec = (void *)(skb->data + len - sizeof(*grec)); group = grec->grec_mca; type = grec->grec_type; len += ntohs(grec->grec_nsrcs) * 4; if (!pskb_may_pull(skb, len)) return -EINVAL; /* We treat this as an IGMPv2 report for now. */ 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 ((type == IGMPV3_CHANGE_TO_INCLUDE || type == IGMPV3_MODE_IS_INCLUDE) && ntohs(grec->grec_nsrcs) == 0) { br_ip4_multicast_leave_group(br, port, group, vid, src); } else { err = br_ip4_multicast_add_group(br, port, group, vid, src); if (err) break; } } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明13648.23%225.00%
Herbert Xu8028.37%112.50%
Satish Ashok3713.12%112.50%
Felix Fietkau196.74%112.50%
Linus Lüssing51.77%112.50%
Vlad Yasevich51.77%225.00%
Total282100.00%8100.00%

#if IS_ENABLED(CONFIG_IPV6)
static int br_ip6_multicast_mld2_report(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { const unsigned char *src; struct icmp6hdr *icmp6h; struct mld2_grec *grec; int i; int len; int num; int err = 0; if (!pskb_may_pull(skb, sizeof(*icmp6h))) return -EINVAL; icmp6h = icmp6_hdr(skb); num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); len = skb_transport_offset(skb) + sizeof(*icmp6h); for (i = 0; i < num; i++) { __be16 *nsrcs, _nsrcs; nsrcs = skb_header_pointer(skb, len + offsetof(struct mld2_grec, grec_nsrcs), sizeof(_nsrcs), &_nsrcs); if (!nsrcs) return -EINVAL; if (!pskb_may_pull(skb, len + sizeof(*grec) + sizeof(struct in6_addr) * ntohs(*nsrcs))) return -EINVAL; grec = (struct mld2_grec *)(skb->data + len); len += sizeof(*grec) + sizeof(struct in6_addr) * ntohs(*nsrcs); /* We treat these as MLDv1 reports for now. */ 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) && ntohs(*nsrcs) == 0) { br_ip6_multicast_leave_group(br, port, &grec->grec_mca, vid, src); } else { err = br_ip6_multicast_add_group(br, port, &grec->grec_mca, vid, src); if (err) break; } } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明17351.18%220.00%
Herbert Xu8625.44%110.00%
Satish Ashok4312.72%110.00%
Felix Fietkau195.62%110.00%
Linus Lüssing123.55%330.00%
Vlad Yasevich51.48%220.00%
Total338100.00%10100.00%

#endif
static bool br_ip4_multicast_select_querier(struct net_bridge *br, struct net_bridge_port *port, __be32 saddr) { if (!timer_pending(&br->ip4_own_query.timer) && !timer_pending(&br->ip4_other_query.timer)) goto update; if (!br->ip4_querier.addr.u.ip4) goto update; if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) goto update; return false; update: br->ip4_querier.addr.u.ip4 = saddr; /* update protected by general multicast_lock by caller */ rcu_assign_pointer(br->ip4_querier.port, port); return true; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing117100.00%2100.00%
Total117100.00%2100.00%

#if IS_ENABLED(CONFIG_IPV6)
static bool br_ip6_multicast_select_querier(struct net_bridge *br, struct net_bridge_port *port, struct in6_addr *saddr) { if (!timer_pending(&br->ip6_own_query.timer) && !timer_pending(&br->ip6_other_query.timer)) goto update; if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) goto update; return false; update: br->ip6_querier.addr.u.ip6 = *saddr; /* update protected by general multicast_lock by caller */ rcu_assign_pointer(br->ip6_querier.port, port); return true; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing104100.00%2100.00%
Total104100.00%2100.00%

#endif
static bool br_multicast_select_querier(struct net_bridge *br, struct net_bridge_port *port, struct br_ip *saddr) { switch (saddr->proto) { case htons(ETH_P_IP): return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); #endif } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing81100.00%2100.00%
Total81100.00%2100.00%


static void br_multicast_update_query_timer(struct net_bridge *br, struct bridge_mcast_other_query *query, unsigned long max_delay) { if (!timer_pending(&query->timer)) query->delay_time = jiffies + max_delay; mod_timer(&query->timer, jiffies + br->multicast_querier_interval); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing53100.00%3100.00%
Total53100.00%3100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Nogah Frankel54100.00%1100.00%
Total54100.00%1100.00%

/* * Add port to router_list * list is maintained ordered by pointer value * and locked by br->multicast_lock and RCU */
static void br_multicast_add_router(struct net_bridge *br, struct net_bridge_port *port) { struct net_bridge_port *p; struct hlist_node *slot = NULL; if (!hlist_unhashed(&port->rlist)) return; hlist_for_each_entry(p, &br->router_list, rlist) { if ((unsigned long) port >= (unsigned long) p) break; slot = &p->rlist; } if (slot) hlist_add_behind_rcu(&port->rlist, slot); else hlist_add_head_rcu(&port->rlist, &br->router_list); br_rtr_notify(br->dev, port, RTM_NEWMDB); br_port_mc_router_state_change(port, true); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4033.90%216.67%
Stephen Hemminger2218.64%216.67%
Hideaki Yoshifuji / 吉藤英明1815.25%216.67%
Nikolay Aleksandrov1210.17%18.33%
Satish Ashok119.32%18.33%
Nogah Frankel75.93%18.33%
Sasha Levin43.39%18.33%
Ken Helias32.54%18.33%
David S. Miller10.85%18.33%
Total118100.00%12100.00%


static void br_multicast_mark_router(struct net_bridge *br, struct net_bridge_port *port) { unsigned long now = jiffies; if (!port) { if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) mod_timer(&br->multicast_router_timer, now + br->multicast_querier_interval); return; } if (port->multicast_router == MDB_RTR_TYPE_DISABLED || port->multicast_router == MDB_RTR_TYPE_PERM) return; br_multicast_add_router(br, port); mod_timer(&port->multicast_router_timer, now + br->multicast_querier_interval); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4146.59%125.00%
Herbert Xu3843.18%125.00%
Nikolay Aleksandrov910.23%250.00%
Total88100.00%4100.00%


static void br_multicast_query_received(struct net_bridge *br, struct net_bridge_port *port, struct bridge_mcast_other_query *query, struct br_ip *saddr, unsigned long max_delay) { if (!br_multicast_select_querier(br, port, saddr)) return; br_multicast_update_query_timer(br, query, max_delay); br_multicast_mark_router(br, port); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing2542.37%562.50%
Herbert Xu1932.20%225.00%
Hideaki Yoshifuji / 吉藤英明1525.42%112.50%
Total59100.00%8100.00%


static int br_ip4_multicast_query(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { 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; unsigned int offset = skb_transport_offset(skb); __be32 group; int err = 0; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || (port && port->state == BR_STATE_DISABLED)) goto out; group = ih->group; if (skb->len == offset + sizeof(*ih)) { max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); if (!max_delay) { max_delay = 10 * HZ; group = 0; } } else if (skb->len >= offset + sizeof(*ih3)) { ih3 = igmpv3_query_hdr(skb); if (ih3->nsrcs) 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.u.ip4 = iph->saddr; br_multicast_query_received(br, port, &br->ip4_other_query, &saddr, max_delay); goto out; } mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid); if (!mp) goto out; max_delay *= br->multicast_last_member_count; if (mp->mglist && (timer_pending(&mp->timer) ? time_after(mp->timer.expires, now + max_delay) : try_to_del_timer_sync(&mp->timer) >= 0)) mod_timer(&mp->timer, now + max_delay); for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; pp = &p->next) { if (timer_pending(&p->timer) ? time_after(p->timer.expires, now + max_delay) : try_to_del_timer_sync(&p->timer) >= 0) mod_timer(&p->timer, now + max_delay); } out: spin_unlock(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明22949.89%16.67%
Herbert Xu13930.28%320.00%
Linus Lüssing7215.69%746.67%
Eric Dumazet143.05%213.33%
Vlad Yasevich51.09%213.33%
Total459100.00%15100.00%

#if IS_ENABLED(CONFIG_IPV6)
static int br_ip6_multicast_query(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { const struct ipv6hdr *ip6h = ipv6_hdr(skb); struct mld_msg *mld; struct net_bridge_mdb_entry *mp; struct mld2_query *mld2q; struct net_bridge_port_group *p; struct net_bridge_port_group __rcu **pp; struct br_ip saddr; unsigned long max_delay; unsigned long now = jiffies; unsigned int offset = skb_transport_offset(skb); const struct in6_addr *group = NULL; bool is_general_query; int err = 0; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || (port && port->state == BR_STATE_DISABLED)) goto out; if (skb->len == offset + 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; 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.u.ip6 = ip6h->saddr; br_multicast_query_received(br, port, &br->ip6_other_query, &saddr, max_delay); goto out; } else if (!group) { goto out; } mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid); if (!mp) goto out; max_delay *= br->multicast_last_member_count; if (mp->mglist && (timer_pending(&mp->timer) ? time_after(mp->timer.expires, now + max_delay) : try_to_del_timer_sync(&mp->timer) >= 0)) mod_timer(&mp->timer, now + max_delay); for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; pp = &p->next) { if (timer_pending(&p->timer) ? time_after(p->timer.expires, now + max_delay) : try_to_del_timer_sync(&p->timer) >= 0) mod_timer(&p->timer, now + max_delay); } out: spin_unlock(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明24246.81%14.76%
Herbert Xu15429.79%314.29%
Linus Lüssing8516.44%942.86%
Eric Dumazet193.68%314.29%
Daniel Borkmann71.35%14.76%
Vlad Yasevich50.97%29.52%
Ang Way Chuang40.77%14.76%
Li RongQing10.19%14.76%
Total517100.00%21100.00%

#endif
static void br_multicast_leave_group(struct net_bridge *br, struct net_bridge_port *port, struct br_ip *group, struct bridge_mcast_other_query *other_query, struct bridge_mcast_own_query *own_query, const unsigned char *src) { struct net_bridge_mdb_htable *mdb; struct net_bridge_mdb_entry *mp; struct net_bridge_port_group *p; unsigned long now; unsigned long time; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || (port && port->state == BR_STATE_DISABLED)) goto out; mdb = mlock_dereference(br->mdb, br); mp = br_mdb_ip_get(mdb, group); if (!mp) goto out; if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { struct net_bridge_port_group __rcu **pp; for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; pp = &p->next) { if (!br_port_group_equal(p, port, src)) continue; rcu_assign_pointer(*pp, p->next); hlist_del_init(&p->mglist); del_timer(&p->timer); call_rcu_bh(&p->rcu, br_multicast_free_pg); br_mdb_notify(br->dev, port, group, RTM_DELMDB, p->flags); if (!mp->ports && !mp->mglist && netif_running(br->dev)) mod_timer(&mp->timer, jiffies); } goto out; } if (timer_pending(&other_query->timer)) goto out; if (br->multicast_querier) { __br_multicast_send_query(br, port, &mp->addr); time = jiffies + br->multicast_last_member_count * br->multicast_last_member_interval; mod_timer(&own_query->timer, time); for (p = mlock_dereference(mp->ports, br); p != NULL; p = mlock_dereference(p->next, br)) { if (!br_port_group_equal(p, port, src)) continue; if (!hlist_unhashed(&p->mglist) && (timer_pending(&p->timer) ? time_after(p->timer.expires, time) : try_to_del_timer_sync(&p->timer) >= 0)) { mod_timer(&p->timer, time); } break; } } now = jiffies; time = now + br->multicast_last_member_count * br->multicast_last_member_interval; if (!port) { if (mp->mglist && (timer_pending(&mp->timer) ? time_after(mp->timer.expires, time) : try_to_del_timer_sync(&mp->timer) >= 0)) { mod_timer(&mp->timer, time); } goto out; } for (p = mlock_dereference(mp->ports, br); p != NULL; p = mlock_dereference(p->next, br)) { if (p->port != port) continue; if (!hlist_unhashed(&p->mglist) && (timer_pending(&p->timer) ? time_after(p->timer.expires, time) : try_to_del_timer_sync(&p->timer) >= 0)) { mod_timer(&p->timer, time); } break; } out: spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Satish Ashok14624.25%17.14%
Herbert Xu14123.42%17.14%
Américo Wang13021.59%214.29%
Linus Lüssing10717.77%321.43%
Hideaki Yoshifuji / 吉藤英明396.48%214.29%
Felix Fietkau203.32%17.14%
Elad Raz71.16%17.14%
David S. Miller50.83%17.14%
Eric Dumazet50.83%17.14%
Nikolay Aleksandrov20.33%17.14%
Total602100.00%14100.00%


static void br_ip4_multicast_leave_group(struct net_bridge *br, struct net_bridge_port *port, __be32 group, __u16 vid, const unsigned char *src) { struct br_ip br_group; struct bridge_mcast_own_query *own_query; if (ipv4_is_local_multicast(group)) return; own_query = port ? &port->ip4_own_query : &br->ip4_own_query; br_group.u.ip4 = group; br_group.proto = htons(ETH_P_IP); br_group.vid = vid; br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, own_query, src); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4039.60%228.57%
Linus Lüssing2625.74%228.57%
Herbert Xu1817.82%114.29%
Vlad Yasevich98.91%114.29%
Felix Fietkau87.92%114.29%
Total101100.00%7100.00%

#if IS_ENABLED(CONFIG_IPV6)
static void br_ip6_multicast_leave_group(struct net_bridge *br, struct net_bridge_port *port, const struct in6_addr *group, __u16 vid, const unsigned char *src) { struct br_ip br_group; struct bridge_mcast_own_query *own_query; if (ipv6_addr_is_ll_all_nodes(group)) return; own_query = port ? &port->ip6_own_query : &br->ip6_own_query; br_group.u.ip6 = *group; br_group.proto = htons(ETH_P_IPV6); br_group.vid = vid; br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, own_query, src); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5451.43%222.22%
Linus Lüssing2725.71%333.33%
Vlad Yasevich98.57%111.11%
Felix Fietkau87.62%111.11%
Herbert Xu54.76%111.11%
Alexey Dobriyan21.90%111.11%
Total105100.00%9100.00%

#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->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); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov131100.00%1100.00%
Total131100.00%1100.00%


static void br_multicast_pim(struct net_bridge *br, struct net_bridge_port *port, const struct sk_buff *skb) { unsigned int offset = skb_transport_offset(skb); struct pimhdr *pimhdr, _pimhdr; pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) return; br_multicast_mark_router(br, port); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov82100.00%1100.00%
Total82100.00%1100.00%


static int br_multicast_ipv4_rcv(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { struct sk_buff *skb_trimmed = NULL; const unsigned char *src; struct igmphdr *ih; int err; err = ip_mc_check_igmp(skb, &skb_trimmed); if (err == -ENOMSG) { if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { BR_INPUT_SKB_CB(skb)->mrouters_only = 1; } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { if (ip_hdr(skb)->protocol == IPPROTO_PIM) br_multicast_pim(br, port, skb); } return 0; } else if (err < 0) { br_multicast_err_count(br, port, skb->protocol); return err; } ih = igmp_hdr(skb); src = eth_hdr(skb)->h_source; BR_INPUT_SKB_CB(skb)->igmp = ih->type; switch (ih->type) { case IGMP_HOST_MEMBERSHIP_REPORT: case IGMPV2_HOST_MEMBERSHIP_REPORT: BR_INPUT_SKB_CB(skb)->mrouters_only = 1; err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); break; case IGMPV3_HOST_MEMBERSHIP_REPORT: err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid); break; case IGMP_HOST_MEMBERSHIP_QUERY: err = br_ip4_multicast_query(br, port, skb_trimmed, vid); break; case IGMP_HOST_LEAVE_MESSAGE: br_ip4_multicast_leave_group(br, port, ih->group, vid, src); break; } if (skb_trimmed && skb_trimmed != skb) kfree_skb(skb_trimmed); br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, BR_MCAST_DIR_RX); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明10434.21%215.38%
Nikolay Aleksandrov7524.67%215.38%
Herbert Xu5919.41%215.38%
Linus Lüssing3110.20%215.38%
Felix Fietkau196.25%17.69%
Vlad Yasevich113.62%215.38%
Américo Wang41.32%17.69%
Fernando Luis Vázquez Cao10.33%17.69%
Total304100.00%13100.00%

#if IS_ENABLED(CONFIG_IPV6)
static int br_multicast_ipv6_rcv(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { struct sk_buff *skb_trimmed = NULL; const unsigned char *src; struct mld_msg *mld; int err; err = ipv6_mc_check_mld(skb, &skb_trimmed); if (err == -ENOMSG) { if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) BR_INPUT_SKB_CB(skb)->mrouters_only = 1; return 0; } else if (err < 0) { br_multicast_err_count(br, port, skb->protocol); return err; } mld = (struct mld_msg *)skb_transport_header(skb); BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; switch (mld->mld_type) { case ICMPV6_MGM_REPORT: src = eth_hdr(skb)->h_source; BR_INPUT_SKB_CB(skb)->mrouters_only = 1; err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, src); break; case ICMPV6_MLD2_REPORT: err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid); break; case ICMPV6_MGM_QUERY: err = br_ip6_multicast_query(br, port, skb_trimmed, vid); break; case ICMPV6_MGM_REDUCTION: src = eth_hdr(skb)->h_source; br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); break; } if (skb_trimmed && skb_trimmed != skb) kfree_skb(skb_trimmed); br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, BR_MCAST_DIR_RX); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu10135.94%18.33%
Linus Lüssing5519.57%433.33%
Nikolay Aleksandrov5017.79%18.33%
Felix Fietkau289.96%18.33%
Hideaki Yoshifuji / 吉藤英明279.61%18.33%
Vlad Yasevich113.91%216.67%
Tomas Winkler82.85%18.33%
Fernando Luis Vázquez Cao10.36%18.33%
Total281100.00%12100.00%

#endif
int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb, u16 vid) { int ret = 0; BR_INPUT_SKB_CB(skb)->igmp = 0; BR_INPUT_SKB_CB(skb)->mrouters_only = 0; if (br->multicast_disabled) return 0; switch (skb->protocol) { case htons(ETH_P_IP): ret = br_multicast_ipv4_rcv(br, port, skb, vid); break; #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): ret = br_multicast_ipv6_rcv(br, port, skb, vid); break; #endif } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu5346.49%116.67%
Hideaki Yoshifuji / 吉藤英明3934.21%233.33%
Nikolay Aleksandrov1412.28%116.67%
Vlad Yasevich76.14%116.67%
Eric Dumazet10.88%116.67%
Total114100.00%6100.00%


static void br_multicast_query_expired(struct net_bridge *br, struct bridge_mcast_own_query *query, struct bridge_mcast_querier *querier) { spin_lock(&br->multicast_lock); if (query->startup_sent < br->multicast_startup_query_count) query->startup_sent++; RCU_INIT_POINTER(querier->port, NULL); br_multicast_send_query(br, NULL, query); spin_unlock(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4462.86%116.67%
Linus Lüssing2332.86%350.00%
Eric Dumazet22.86%116.67%
Andreea-Cristina Bernat11.43%116.67%
Total70100.00%6100.00%


static void br_ip4_multicast_query_expired(unsigned long data) { struct net_bridge *br = (void *)data; br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing36100.00%3100.00%
Total36100.00%3100.00%

#if IS_ENABLED(CONFIG_IPV6)
static void br_ip6_multicast_query_expired(unsigned long data) { struct net_bridge *br = (void *)data; br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing36100.00%3100.00%
Total36100.00%3100.00%

#endif
void br_multicast_init(struct net_bridge *br) { br->hash_elasticity = 4; br->hash_max = 512; br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; br->multicast_querier = 0; br->multicast_query_use_ifaddr = 0; br->multicast_last_member_count = 2; br->multicast_startup_query_count = 2; br->multicast_last_member_interval = HZ; br->multicast_query_response_interval = 10 * HZ; br->multicast_startup_query_interval = 125 * HZ / 4; br->multicast_query_interval = 125 * HZ; br->multicast_querier_interval = 255 * HZ; br->multicast_membership_interval = 260 * HZ; br->ip4_other_query.delay_time = 0; br->ip4_querier.port = NULL; br->multicast_igmp_version = 2; #if IS_ENABLED(CONFIG_IPV6) br->multicast_mld_version = 1; br->ip6_other_query.delay_time = 0; br->ip6_querier.port = NULL; #endif br->has_ipv6_addr = 1; spin_lock_init(&br->multicast_lock); setup_timer(&br->multicast_router_timer, br_multicast_local_router_expired, 0); setup_timer(&br->ip4_other_query.timer, br_ip4_multicast_querier_expired, (unsigned long)br); setup_timer(&br->ip4_own_query.timer, br_ip4_multicast_query_expired, (unsigned long)br); #if IS_ENABLED(CONFIG_IPV6) setup_timer(&br->ip6_other_query.timer, br_ip6_multicast_querier_expired, (unsigned long)br); setup_timer(&br->ip6_own_query.timer, br_ip6_multicast_query_expired, (unsigned long)br); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu14154.65%327.27%
Linus Lüssing9235.66%436.36%
Nikolay Aleksandrov135.04%218.18%
Américo Wang62.33%19.09%
daniel62.33%19.09%
Total258100.00%11100.00%


static void __br_multicast_open(struct net_bridge *br, struct bridge_mcast_own_query *query) { query->startup_sent = 0; if (br->multicast_disabled) return; mod_timer(&query->timer, jiffies); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2871.79%133.33%
Linus Lüssing1128.21%266.67%
Total39100.00%3100.00%


void br_multicast_open(struct net_bridge *br) { __br_multicast_open(br, &br->ip4_own_query); #if IS_ENABLED(CONFIG_IPV6) __br_multicast_open(br, &br->ip6_own_query); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing38100.00%2100.00%
Total38100.00%2100.00%


void br_multicast_stop(struct net_bridge *br) { del_timer_sync(&br->multicast_router_timer); del_timer_sync(&br->ip4_other_query.timer); del_timer_sync(&br->ip4_own_query.timer); #if IS_ENABLED(CONFIG_IPV6) del_timer_sync(&br->ip6_other_query.timer); del_timer_sync(&br->ip6_own_query.timer); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing3451.52%250.00%
Herbert Xu3146.97%125.00%
Satish Ashok11.52%125.00%
Total66100.00%4100.00%


void br_multicast_dev_del(struct net_bridge *br) { struct net_bridge_mdb_htable *mdb; struct net_bridge_mdb_entry *mp; struct hlist_node *n; u32 ver; int i; spin_lock_bh(&br->multicast_lock); mdb = mlock_dereference(br->mdb, br); if (!mdb) goto out; br->mdb = NULL; ver = mdb->ver; for (i = 0; i < mdb->max; i++) { hlist_for_each_entry_safe(mp, n, &mdb->mhash[i], hlist[ver]) { del_timer(&mp->timer); call_rcu_bh(&mp->rcu, br_multicast_free_group); } } if (mdb->old) { spin_unlock_bh(&br->multicast_lock); rcu_barrier_bh(); spin_lock_bh(&br->multicast_lock); WARN_ON(mdb->old); } mdb->old = mdb; call_rcu_bh(&mdb->rcu, br_mdb_free); out: spin_unlock_bh(&br->multicast_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu14280.23%250.00%
Satish Ashok3016.95%125.00%
Eric Dumazet52.82%125.00%
Total177100.00%4100.00%


int br_multicast_set_router(struct net_bridge *br, unsigned long val) { int err = -EINVAL; spin_lock_bh(&br->multicast_lock); switch (val) { case MDB_RTR_TYPE_DISABLED: case MDB_RTR_TYPE_PERM: del_timer(&br->multicast_router_timer); /* fall through */ case MDB_RTR_TYPE_TEMP_QUERY: br->multicast_router = val; err = 0; break; } spin_unlock_bh(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu7094.59%133.33%
Nikolay Aleksandrov34.05%133.33%
Linus Lüssing11.35%133.33%
Total74100.00%3100.00%


static void __del_port_router(struct net_bridge_port *p) { if (hlist_unhashed(&p->rlist)) return; hlist_del_init_rcu(&p->rlist); br_rtr_notify(p->br->dev, p, RTM_DELMDB); br_port_mc_router_state_change(p, false); /* don't allow timer refresh */ if (p->multicast_router == MDB_RTR_TYPE_TEMP) p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov4366.15%133.33%
Nogah Frankel2233.85%266.67%
Total65100.00%3100.00%


int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) { struct net_bridge *br = p->br; unsigned long now = jiffies; int err = -EINVAL; spin_lock(&br->multicast_lock); if (p->multicast_router == val) { /* Refresh the temp router port timer */ if (p->multicast_router == MDB_RTR_TYPE_TEMP) mod_timer(&p->multicast_router_timer, now + br->multicast_querier_interval); err = 0; goto unlock; } switch (val) { case MDB_RTR_TYPE_DISABLED: p->multicast_router = MDB_RTR_TYPE_DISABLED; __del_port_router(p); del_timer(&p->multicast_router_timer); break; case MDB_RTR_TYPE_TEMP_QUERY: p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; __del_port_router(p); break; case MDB_RTR_TYPE_PERM: p->multicast_router = MDB_RTR_TYPE_PERM; del_timer(&p->multicast_router_timer); br_multicast_add_router(br, p); break; case MDB_RTR_TYPE_TEMP: p->multicast_router = MDB_RTR_TYPE_TEMP; br_multicast_mark_router(br, p); break; default: goto unlock; } err = 0; unlock: spin_unlock(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov9952.11%350.00%
Herbert Xu8645.26%116.67%
Satish Ashok42.11%116.67%
Linus Lüssing10.53%116.67%
Total190100.00%6100.00%


static void br_multicast_start_querier(struct net_bridge *br, struct bridge_mcast_own_query *query) { struct net_bridge_port *port; __br_multicast_open(br, query); list_for_each_entry(port, &br->port_list, list) { if (port->state == BR_STATE_DISABLED || port->state == BR_STATE_BLOCKING) continue; if (query == &br->ip4_own_query) br_multicast_enable(&port->ip4_own_query); #if IS_ENABLED(CONFIG_IPV6) else br_multicast_enable(&port->ip6_own_query); #endif } }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4956.32%133.33%
Linus Lüssing3843.68%266.67%
Total87100.00%3100.00%


int br_multicast_toggle(struct net_bridge *br, unsigned long val) { struct net_bridge_mdb_htable *mdb; struct net_bridge_port *port; int err = 0; spin_lock_bh(&br->multicast_lock); if (br->multicast_disabled == !val) goto unlock; br_mc_disabled_update(br->dev, !val); br->multicast_disabled = !val; if (br->multicast_disabled) goto unlock; if (!netif_running(br->dev)) goto unlock; mdb = mlock_dereference(br->mdb, br); if (mdb) { if (mdb->old) { err = -EEXIST; rollback: br->multicast_disabled = !!val; goto unlock; } err = br_mdb_rehash(&br->mdb, mdb->max, br->hash_elasticity); if (err) goto rollback; } br_multicast_open(br); list_for_each_entry(port, &br->port_list, list) __br_multicast_enable_port(port); unlock: spin_unlock_bh(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu13572.19%228.57%
Nikolay Aleksandrov1910.16%114.29%
Eric Dumazet168.56%114.29%
Nogah Frankel105.35%114.29%
Linus Lüssing52.67%114.29%
Andrey Vagin21.07%114.29%
Total187100.00%7100.00%


int br_multicast_set_querier(struct net_bridge *br, unsigned long val) { unsigned long max_delay; val = !!val; spin_lock_bh(&br->multicast_lock); if (br->multicast_querier == val) goto unlock; br->multicast_querier = val; if (!val) goto unlock; max_delay = br->multicast_query_response_interval; if (!timer_pending(&br->ip4_other_query.timer)) br->ip4_other_query.delay_time = jiffies + max_delay; br_multicast_start_querier(br, &br->ip4_own_query); #if IS_ENABLED(CONFIG_IPV6) if (!timer_pending(&br->ip6_other_query.timer)) br->ip6_other_query.delay_time = jiffies + max_delay; br_multicast_start_querier(br, &br->ip6_own_query); #endif unlock: spin_unlock_bh(&br->multicast_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing8355.33%375.00%
Herbert Xu6744.67%125.00%
Total150100.00%4100.00%


int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) { int err = -EINVAL; u32 old; struct net_bridge_mdb_htable *mdb; spin_lock_bh(&br->multicast_lock); if (!is_power_of_2(val)) goto unlock; mdb = mlock_dereference(br->mdb, br); if (mdb && val < mdb->size) goto unlock; err = 0; old = br->hash_max; br->hash_max = val; if (mdb) { if (mdb->old) { err = -EEXIST; rollback: br->hash_max = old; goto unlock; } err = br_mdb_rehash(&br->mdb, br->hash_max, br->hash_elasticity); if (err) goto rollback; } unlock: spin_unlock_bh(&br->multicast_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu13687.74%125.00%
Eric Dumazet1610.32%125.00%
Curt Brune21.29%125.00%
Linus Lüssing10.65%125.00%
Total155100.00%4100.00%


int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) { /* Currently we support only version 2 and 3 */ switch (val) { case 2: case 3: break; default: return -EINVAL; } spin_lock_bh(&br->multicast_lock); br->multicast_igmp_version = val; spin_unlock_bh(&br->multicast_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov58100.00%1100.00%
Total58100.00%1100.00%

#if IS_ENABLED(CONFIG_IPV6)
int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) { /* Currently we support version 1 and 2 */ switch (val) { case 1: case 2: break; default: return -EINVAL; } spin_lock_bh(&br->multicast_lock); br->multicast_mld_version = val; spin_unlock_bh(&br->multicast_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov58100.00%1100.00%
Total58100.00%1100.00%

#endif /** * br_multicast_list_adjacent - Returns snooped multicast addresses * @dev: The bridge port adjacent to which to retrieve addresses * @br_ip_list: The list to store found, snooped multicast IP addresses in * * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast * snooping feature on all bridge ports of dev's bridge device, excluding * the addresses from dev itself. * * Returns the number of items added to br_ip_list. * * Notes: * - br_ip_list needs to be initialized by caller * - br_ip_list might contain duplicates in the end * (needs to be taken care of by caller) * - br_ip_list needs to be freed by caller */
int br_multicast_list_adjacent(struct net_device *dev, struct list_head *br_ip_list) { struct net_bridge *br; struct net_bridge_port *port; struct net_bridge_port_group *group; struct br_ip_list *entry; int count = 0; rcu_read_lock(); if (!br_ip_list || !br_port_exists(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->addr; list_add(&entry->list, br_ip_list); count++; } } unlock: rcu_read_unlock(); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing167100.00%1100.00%
Total167100.00%1100.00%

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 (!br_port_exists(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, &eth); unlock: rcu_read_unlock(); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing112100.00%1100.00%
Total112100.00%1100.00%

EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); /** * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port * @dev: The bridge port adjacent to which to check for a querier * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 * * Checks whether the given interface has a bridge on top and if so returns * true if a selected querier is behind one of the other ports of this * bridge. Otherwise returns false. */
bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) { struct net_bridge *br; struct net_bridge_port *port; bool ret = false; rcu_read_lock(); if (!br_port_exists(dev)) goto unlock; port = br_port_get_rcu(dev); if (!port || !port->br) goto unlock; br = port->br; switch (proto) { case ETH_P_IP: if (!timer_pending(&br->ip4_other_query.timer) || rcu_dereference(br->ip4_querier.port) == port) goto unlock; break; #if IS_ENABLED(CONFIG_IPV6) case ETH_P_IPV6: if (!timer_pending(&br->ip6_other_query.timer) || rcu_dereference(br->ip6_querier.port) == port) goto unlock; break; #endif default: goto unlock; } ret = true; unlock: rcu_read_unlock(); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Lüssing160100.00%2100.00%
Total160100.00%2100.00%

EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, const struct sk_buff *skb, u8 type, u8 dir) { struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); __be16 proto = skb->protocol; unsigned int t_len; u64_stats_update_begin(&pstats->syncp); switch (proto) { case htons(ETH_P_IP): t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); switch (type) { case IGMP_HOST_MEMBERSHIP_REPORT: pstats->mstats.igmp_v1reports[dir]++; break; case IGMPV2_HOST_MEMBERSHIP_REPORT: pstats->mstats.igmp_v2reports[dir]++; break; case IGMPV3_HOST_MEMBERSHIP_REPORT: pstats->mstats.igmp_v3reports[dir]++; break; case IGMP_HOST_MEMBERSHIP_QUERY: if (t_len != sizeof(struct igmphdr)) { pstats->mstats.igmp_v3queries[dir]++; } else { unsigned int offset = skb_transport_offset(skb); struct igmphdr *ih, _ihdr; ih = skb_header_pointer(skb, offset, sizeof(_ihdr), &_ihdr); if (!ih) break; if (!ih->code) pstats->mstats.igmp_v1queries[dir]++; else pstats->mstats.igmp_v2queries[dir]++; } break; case IGMP_HOST_LEAVE_MESSAGE: pstats->mstats.igmp_leaves[dir]++; break; } break; #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): t_len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); t_len -= skb_network_header_len(skb); switch (type) { case ICMPV6_MGM_REPORT: pstats->mstats.mld_v1reports[dir]++; break; case ICMPV6_MLD2_REPORT: pstats->mstats.mld_v2reports[dir]++; break; case ICMPV6_MGM_QUERY: if (t_len != sizeof(struct mld_msg)) pstats->mstats.mld_v2queries[dir]++; else pstats->mstats.mld_v1queries[dir]++; break; case ICMPV6_MGM_REDUCTION: pstats->mstats.mld_leaves[dir]++; break; } break; #endif /* CONFIG_IPV6 */ } u64_stats_update_end(&pstats->syncp); }

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PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov373100.00%2100.00%
Total373100.00%2100.00%


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->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); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov83100.00%2100.00%
Total83100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov34100.00%1100.00%
Total34100.00%1100.00%


void br_multicast_uninit_stats(struct net_bridge *br) { free_percpu(br->mcast_stats); }

Contributors

PersonTokensPropCommitsCommitProp
Ido Schimmel17100.00%1100.00%
Total17100.00%1100.00%


static 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]; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov34100.00%1100.00%
Total34100.00%1100.00%


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)); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov317100.00%2100.00%
Total317100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu387830.30%1814.52%
Hideaki Yoshifuji / 吉藤英明298223.30%43.23%
Linus Lüssing220717.24%2822.58%
Nikolay Aleksandrov203015.86%129.68%
Satish Ashok4283.34%54.03%
Américo Wang3042.38%97.26%
Felix Fietkau2531.98%10.81%
Eric Dumazet1791.40%86.45%
Nogah Frankel1711.34%32.42%
Vlad Yasevich1421.11%21.61%
Stephen Hemminger450.35%54.03%
Elad Raz350.27%21.61%
Tobias Klauser200.16%10.81%
daniel180.14%10.81%
Ido Schimmel170.13%10.81%
Ulrich Weber120.09%10.81%
Alexey Dobriyan90.07%10.81%
David S. Miller90.07%43.23%
Tomas Winkler80.06%10.81%
Thomas Graf70.05%10.81%
Eric W. Biedermann70.05%10.81%
Daniel Borkmann70.05%10.81%
Sasha Levin40.03%10.81%
Ang Way Chuang40.03%10.81%
Eldad Zack40.03%10.81%
David L Stevens30.02%10.81%
Ken Helias30.02%10.81%
Fernando Luis Vázquez Cao20.02%21.61%
Andrey Vagin20.02%10.81%
Joe Perches20.02%10.81%
Curt Brune20.02%10.81%
Li RongQing10.01%10.81%
Lance Richardson10.01%10.81%
Patrick McHardy10.01%10.81%
Andreea-Cristina Bernat10.01%10.81%
Total12798100.00%124100.00%
Directory: net/bridge
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