bridge br_multicast: Make functions less ipv4 dependent.
Introduce struct br_ip{} to store ip address and protocol
and make functions more generic so that we can support
both IPv4 and IPv6 with less pain.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki
parent
6e7cb83707
commit
8ef2a9a598
@ -27,48 +27,86 @@
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#include "br_private.h"
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static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
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static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
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{
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if (a->proto != b->proto)
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return 0;
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switch (a->proto) {
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case htons(ETH_P_IP):
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return a->u.ip4 == b->u.ip4;
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}
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return 0;
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}
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static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
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{
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return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1);
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}
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static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb,
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struct br_ip *ip)
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{
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switch (ip->proto) {
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case htons(ETH_P_IP):
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return __br_ip4_hash(mdb, ip->u.ip4);
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}
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return 0;
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}
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static struct net_bridge_mdb_entry *__br_mdb_ip_get(
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struct net_bridge_mdb_htable *mdb, __be32 dst, int hash)
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struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash)
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{
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struct net_bridge_mdb_entry *mp;
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struct hlist_node *p;
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hlist_for_each_entry_rcu(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
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if (dst == mp->addr)
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if (br_ip_equal(&mp->addr, dst))
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return mp;
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}
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return NULL;
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}
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static struct net_bridge_mdb_entry *br_mdb_ip_get(
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static struct net_bridge_mdb_entry *br_mdb_ip4_get(
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struct net_bridge_mdb_htable *mdb, __be32 dst)
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{
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if (!mdb)
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return NULL;
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struct br_ip br_dst;
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br_dst.u.ip4 = dst;
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br_dst.proto = htons(ETH_P_IP);
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return __br_mdb_ip_get(mdb, &br_dst, __br_ip4_hash(mdb, dst));
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}
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static struct net_bridge_mdb_entry *br_mdb_ip_get(
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struct net_bridge_mdb_htable *mdb, struct br_ip *dst)
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{
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return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
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}
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struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
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struct sk_buff *skb)
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{
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if (br->multicast_disabled)
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struct net_bridge_mdb_htable *mdb = br->mdb;
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struct br_ip ip;
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if (!mdb || br->multicast_disabled)
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return NULL;
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if (BR_INPUT_SKB_CB(skb)->igmp)
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return NULL;
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ip.proto = skb->protocol;
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switch (skb->protocol) {
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case htons(ETH_P_IP):
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if (BR_INPUT_SKB_CB(skb)->igmp)
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ip.u.ip4 = ip_hdr(skb)->daddr;
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break;
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return br_mdb_ip_get(br->mdb, ip_hdr(skb)->daddr);
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default:
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return NULL;
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}
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return NULL;
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return br_mdb_ip_get(mdb, &ip);
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}
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static void br_mdb_free(struct rcu_head *head)
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@ -95,7 +133,7 @@ static int br_mdb_copy(struct net_bridge_mdb_htable *new,
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for (i = 0; i < old->max; i++)
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hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver])
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hlist_add_head(&mp->hlist[new->ver],
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&new->mhash[br_ip_hash(new, mp->addr)]);
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&new->mhash[br_ip_hash(new, &mp->addr)]);
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if (!elasticity)
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return 0;
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@ -163,7 +201,7 @@ static void br_multicast_del_pg(struct net_bridge *br,
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struct net_bridge_port_group *p;
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struct net_bridge_port_group **pp;
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mp = br_mdb_ip_get(mdb, pg->addr);
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mp = br_mdb_ip_get(mdb, &pg->addr);
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if (WARN_ON(!mp))
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return;
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@ -249,7 +287,7 @@ out:
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return 0;
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}
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static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
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static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
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__be32 group)
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{
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struct sk_buff *skb;
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@ -314,12 +352,22 @@ out:
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return skb;
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}
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static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
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struct br_ip *addr)
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{
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switch (addr->proto) {
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case htons(ETH_P_IP):
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return br_ip4_multicast_alloc_query(br, addr->u.ip4);
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}
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return NULL;
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}
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static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp)
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{
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struct net_bridge *br = mp->br;
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struct sk_buff *skb;
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skb = br_multicast_alloc_query(br, mp->addr);
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skb = br_multicast_alloc_query(br, &mp->addr);
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if (!skb)
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goto timer;
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@ -353,7 +401,7 @@ static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg)
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struct net_bridge *br = port->br;
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struct sk_buff *skb;
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skb = br_multicast_alloc_query(br, pg->addr);
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skb = br_multicast_alloc_query(br, &pg->addr);
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if (!skb)
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goto timer;
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@ -383,8 +431,8 @@ out:
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}
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static struct net_bridge_mdb_entry *br_multicast_get_group(
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struct net_bridge *br, struct net_bridge_port *port, __be32 group,
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int hash)
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struct net_bridge *br, struct net_bridge_port *port,
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struct br_ip *group, int hash)
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{
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struct net_bridge_mdb_htable *mdb = br->mdb;
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struct net_bridge_mdb_entry *mp;
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@ -396,10 +444,9 @@ static struct net_bridge_mdb_entry *br_multicast_get_group(
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hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
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count++;
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if (unlikely(group == mp->addr)) {
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if (unlikely(br_ip_equal(group, &mp->addr)))
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return mp;
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}
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}
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elasticity = 0;
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max = mdb->max;
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@ -463,7 +510,8 @@ err:
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}
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static struct net_bridge_mdb_entry *br_multicast_new_group(
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struct net_bridge *br, struct net_bridge_port *port, __be32 group)
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struct net_bridge *br, struct net_bridge_port *port,
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struct br_ip *group)
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{
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struct net_bridge_mdb_htable *mdb = br->mdb;
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struct net_bridge_mdb_entry *mp;
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@ -496,7 +544,7 @@ rehash:
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goto out;
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mp->br = br;
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mp->addr = group;
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mp->addr = *group;
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setup_timer(&mp->timer, br_multicast_group_expired,
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(unsigned long)mp);
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setup_timer(&mp->query_timer, br_multicast_group_query_expired,
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@ -510,7 +558,8 @@ out:
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}
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static int br_multicast_add_group(struct net_bridge *br,
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struct net_bridge_port *port, __be32 group)
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struct net_bridge_port *port,
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struct br_ip *group)
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{
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struct net_bridge_mdb_entry *mp;
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struct net_bridge_port_group *p;
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@ -518,9 +567,6 @@ static int br_multicast_add_group(struct net_bridge *br,
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unsigned long now = jiffies;
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int err;
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if (ipv4_is_local_multicast(group))
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return 0;
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spin_lock(&br->multicast_lock);
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if (!netif_running(br->dev) ||
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(port && port->state == BR_STATE_DISABLED))
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@ -549,7 +595,7 @@ static int br_multicast_add_group(struct net_bridge *br,
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if (unlikely(!p))
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goto err;
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p->addr = group;
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p->addr = *group;
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p->port = port;
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p->next = *pp;
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hlist_add_head(&p->mglist, &port->mglist);
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@ -570,6 +616,21 @@ err:
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return err;
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}
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static int br_ip4_multicast_add_group(struct net_bridge *br,
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struct net_bridge_port *port,
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__be32 group)
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{
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struct br_ip br_group;
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if (ipv4_is_local_multicast(group))
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return 0;
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br_group.u.ip4 = group;
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br_group.proto = htons(ETH_P_IP);
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return br_multicast_add_group(br, port, &br_group);
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}
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static void br_multicast_router_expired(unsigned long data)
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{
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struct net_bridge_port *port = (void *)data;
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@ -591,19 +652,15 @@ static void br_multicast_local_router_expired(unsigned long data)
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{
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}
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static void br_multicast_send_query(struct net_bridge *br,
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struct net_bridge_port *port, u32 sent)
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static void __br_multicast_send_query(struct net_bridge *br,
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struct net_bridge_port *port,
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struct br_ip *ip)
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{
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unsigned long time;
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struct sk_buff *skb;
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if (!netif_running(br->dev) || br->multicast_disabled ||
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timer_pending(&br->multicast_querier_timer))
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return;
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skb = br_multicast_alloc_query(br, 0);
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skb = br_multicast_alloc_query(br, ip);
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if (!skb)
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goto timer;
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return;
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if (port) {
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__skb_push(skb, sizeof(struct ethhdr));
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@ -612,8 +669,23 @@ static void br_multicast_send_query(struct net_bridge *br,
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dev_queue_xmit);
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} else
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netif_rx(skb);
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}
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static void br_multicast_send_query(struct net_bridge *br,
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struct net_bridge_port *port, u32 sent)
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{
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unsigned long time;
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struct br_ip br_group;
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if (!netif_running(br->dev) || br->multicast_disabled ||
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timer_pending(&br->multicast_querier_timer))
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return;
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br_group.u.ip4 = 0;
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br_group.proto = htons(ETH_P_IP);
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__br_multicast_send_query(br, port, &br_group);
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timer:
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time = jiffies;
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time += sent < br->multicast_startup_query_count ?
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br->multicast_startup_query_interval :
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@ -698,7 +770,7 @@ void br_multicast_disable_port(struct net_bridge_port *port)
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spin_unlock(&br->multicast_lock);
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}
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static int br_multicast_igmp3_report(struct net_bridge *br,
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static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
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struct net_bridge_port *port,
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struct sk_buff *skb)
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{
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@ -745,7 +817,7 @@ static int br_multicast_igmp3_report(struct net_bridge *br,
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continue;
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}
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err = br_multicast_add_group(br, port, group);
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err = br_ip4_multicast_add_group(br, port, group);
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if (err)
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break;
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}
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@ -800,7 +872,7 @@ timer:
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static void br_multicast_query_received(struct net_bridge *br,
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struct net_bridge_port *port,
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__be32 saddr)
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int saddr)
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{
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if (saddr)
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mod_timer(&br->multicast_querier_timer,
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@ -811,7 +883,7 @@ static void br_multicast_query_received(struct net_bridge *br,
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br_multicast_mark_router(br, port);
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}
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static int br_multicast_query(struct net_bridge *br,
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static int br_ip4_multicast_query(struct net_bridge *br,
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struct net_bridge_port *port,
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struct sk_buff *skb)
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{
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@ -831,7 +903,7 @@ static int br_multicast_query(struct net_bridge *br,
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(port && port->state == BR_STATE_DISABLED))
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goto out;
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br_multicast_query_received(br, port, iph->saddr);
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br_multicast_query_received(br, port, !!iph->saddr);
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group = ih->group;
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@ -859,7 +931,7 @@ static int br_multicast_query(struct net_bridge *br,
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if (!group)
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goto out;
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mp = br_mdb_ip_get(br->mdb, group);
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mp = br_mdb_ip4_get(br->mdb, group);
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if (!mp)
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goto out;
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@ -885,7 +957,7 @@ out:
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static void br_multicast_leave_group(struct net_bridge *br,
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struct net_bridge_port *port,
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__be32 group)
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struct br_ip *group)
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{
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struct net_bridge_mdb_htable *mdb;
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struct net_bridge_mdb_entry *mp;
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@ -893,9 +965,6 @@ static void br_multicast_leave_group(struct net_bridge *br,
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unsigned long now;
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unsigned long time;
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if (ipv4_is_local_multicast(group))
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return;
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spin_lock(&br->multicast_lock);
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if (!netif_running(br->dev) ||
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(port && port->state == BR_STATE_DISABLED) ||
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@ -946,6 +1015,22 @@ out:
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spin_unlock(&br->multicast_lock);
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}
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static void br_ip4_multicast_leave_group(struct net_bridge *br,
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struct net_bridge_port *port,
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__be32 group)
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{
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struct br_ip br_group;
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if (ipv4_is_local_multicast(group))
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return;
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br_group.u.ip4 = group;
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br_group.proto = htons(ETH_P_IP);
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br_multicast_leave_group(br, port, &br_group);
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}
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static int br_multicast_ipv4_rcv(struct net_bridge *br,
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struct net_bridge_port *port,
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struct sk_buff *skb)
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@ -1023,16 +1108,16 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
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case IGMP_HOST_MEMBERSHIP_REPORT:
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case IGMPV2_HOST_MEMBERSHIP_REPORT:
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BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
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err = br_multicast_add_group(br, port, ih->group);
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err = br_ip4_multicast_add_group(br, port, ih->group);
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break;
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case IGMPV3_HOST_MEMBERSHIP_REPORT:
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err = br_multicast_igmp3_report(br, port, skb2);
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err = br_ip4_multicast_igmp3_report(br, port, skb2);
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break;
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case IGMP_HOST_MEMBERSHIP_QUERY:
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err = br_multicast_query(br, port, skb2);
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err = br_ip4_multicast_query(br, port, skb2);
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break;
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case IGMP_HOST_LEAVE_MESSAGE:
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br_multicast_leave_group(br, port, ih->group);
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br_ip4_multicast_leave_group(br, port, ih->group);
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break;
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}
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@ -45,6 +45,14 @@ struct mac_addr
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unsigned char addr[6];
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};
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struct br_ip
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{
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union {
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__be32 ip4;
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} u;
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__be16 proto;
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};
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struct net_bridge_fdb_entry
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{
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struct hlist_node hlist;
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@ -64,7 +72,7 @@ struct net_bridge_port_group {
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struct rcu_head rcu;
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struct timer_list timer;
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struct timer_list query_timer;
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__be32 addr;
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struct br_ip addr;
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u32 queries_sent;
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};
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@ -77,7 +85,7 @@ struct net_bridge_mdb_entry
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struct rcu_head rcu;
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struct timer_list timer;
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struct timer_list query_timer;
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__be32 addr;
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struct br_ip addr;
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u32 queries_sent;
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};
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