net: convert BUG_TRAP to generic WARN_ON

[linux-2.6-omap-h63xx.git] / net / ipv4 / inet_hashtables.c

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 1aba606f6bbb610249dcc06291d3435907b53a30..44981906fb913e7afbb4f7e03cd0192b9fdcda12 100644 (file)
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -35,7 +35,7 @@ struct inet_bind_bucket *inet_bind_bucket_create(struct kmem_cache *cachep,
        struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, GFP_ATOMIC);
 
        if (tb != NULL) {
-               tb->ib_net       = net;
+               tb->ib_net       = hold_net(net);
                tb->port      = snum;
                tb->fastreuse = 0;
                INIT_HLIST_HEAD(&tb->owners);
@@ -51,6 +51,7 @@ void inet_bind_bucket_destroy(struct kmem_cache *cachep, struct inet_bind_bucket
 {
        if (hlist_empty(&tb->owners)) {
                __hlist_del(&tb->node);
+               release_net(tb->ib_net);
                kmem_cache_free(cachep, tb);
        }
 }
@@ -68,8 +69,9 @@ void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
  */
 static void __inet_put_port(struct sock *sk)
 {
-       struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
-       const int bhash = inet_bhashfn(inet_sk(sk)->num, hashinfo->bhash_size);
+       struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
+       const int bhash = inet_bhashfn(sock_net(sk), inet_sk(sk)->num,
+                       hashinfo->bhash_size);
        struct inet_bind_hashbucket *head = &hashinfo->bhash[bhash];
        struct inet_bind_bucket *tb;
 
@@ -91,6 +93,23 @@ void inet_put_port(struct sock *sk)
 
 EXPORT_SYMBOL(inet_put_port);
 
+void __inet_inherit_port(struct sock *sk, struct sock *child)
+{
+       struct inet_hashinfo *table = sk->sk_prot->h.hashinfo;
+       const int bhash = inet_bhashfn(sock_net(sk), inet_sk(child)->num,
+                       table->bhash_size);
+       struct inet_bind_hashbucket *head = &table->bhash[bhash];
+       struct inet_bind_bucket *tb;
+
+       spin_lock(&head->lock);
+       tb = inet_csk(sk)->icsk_bind_hash;
+       sk_add_bind_node(child, &tb->owners);
+       inet_csk(child)->icsk_bind_hash = tb;
+       spin_unlock(&head->lock);
+}
+
+EXPORT_SYMBOL_GPL(__inet_inherit_port);
+
 /*
  * This lock without WQ_FLAG_EXCLUSIVE is good on UP and it can be very bad on SMP.
  * Look, when several writers sleep and reader wakes them up, all but one
@@ -139,7 +158,7 @@ static struct sock *inet_lookup_listener_slow(struct net *net,
        sk_for_each(sk, node, head) {
                const struct inet_sock *inet = inet_sk(sk);
 
-               if (sk->sk_net == net && inet->num == hnum &&
+               if (net_eq(sock_net(sk), net) && inet->num == hnum &&
                                !ipv6_only_sock(sk)) {
                        const __be32 rcv_saddr = inet->rcv_saddr;
                        int score = sk->sk_family == PF_INET ? 1 : 0;
@@ -175,14 +194,14 @@ struct sock *__inet_lookup_listener(struct net *net,
        const struct hlist_head *head;
 
        read_lock(&hashinfo->lhash_lock);
-       head = &hashinfo->listening_hash[inet_lhashfn(hnum)];
+       head = &hashinfo->listening_hash[inet_lhashfn(net, hnum)];
        if (!hlist_empty(head)) {
                const struct inet_sock *inet = inet_sk((sk = __sk_head(head)));
 
                if (inet->num == hnum && !sk->sk_node.next &&
                    (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
                    (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
-                   !sk->sk_bound_dev_if && sk->sk_net == net)
+                   !sk->sk_bound_dev_if && net_eq(sock_net(sk), net))
                        goto sherry_cache;
                sk = inet_lookup_listener_slow(net, head, daddr, hnum, dif);
        }
@@ -208,7 +227,7 @@ struct sock * __inet_lookup_established(struct net *net,
        /* Optimize here for direct hit, only listening connections can
         * have wildcards anyways.
         */
-       unsigned int hash = inet_ehashfn(daddr, hnum, saddr, sport);
+       unsigned int hash = inet_ehashfn(net, daddr, hnum, saddr, sport);
        struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash);
        rwlock_t *lock = inet_ehash_lockp(hashinfo, hash);
 
@@ -248,13 +267,13 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
        int dif = sk->sk_bound_dev_if;
        INET_ADDR_COOKIE(acookie, saddr, daddr)
        const __portpair ports = INET_COMBINED_PORTS(inet->dport, lport);
-       unsigned int hash = inet_ehashfn(daddr, lport, saddr, inet->dport);
+       struct net *net = sock_net(sk);
+       unsigned int hash = inet_ehashfn(net, daddr, lport, saddr, inet->dport);
        struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash);
        rwlock_t *lock = inet_ehash_lockp(hinfo, hash);
        struct sock *sk2;
        const struct hlist_node *node;
        struct inet_timewait_sock *tw;
-       struct net *net = sk->sk_net;
 
        prefetch(head->chain.first);
        write_lock(lock);
@@ -286,18 +305,18 @@ unique:
        inet->num = lport;
        inet->sport = htons(lport);
        sk->sk_hash = hash;
-       BUG_TRAP(sk_unhashed(sk));
+       WARN_ON(!sk_unhashed(sk));
        __sk_add_node(sk, &head->chain);
-       sock_prot_inuse_add(sk->sk_prot, 1);
+       sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
        write_unlock(lock);
 
        if (twp) {
                *twp = tw;
-               NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
+               NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED);
        } else if (tw) {
                /* Silly. Should hash-dance instead... */
                inet_twsk_deschedule(tw, death_row);
-               NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
+               NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED);
 
                inet_twsk_put(tw);
        }
@@ -318,12 +337,12 @@ static inline u32 inet_sk_port_offset(const struct sock *sk)
 
 void __inet_hash_nolisten(struct sock *sk)
 {
-       struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+       struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
        struct hlist_head *list;
        rwlock_t *lock;
        struct inet_ehash_bucket *head;
 
-       BUG_TRAP(sk_unhashed(sk));
+       WARN_ON(!sk_unhashed(sk));
 
        sk->sk_hash = inet_sk_ehashfn(sk);
        head = inet_ehash_bucket(hashinfo, sk->sk_hash);
@@ -332,14 +351,14 @@ void __inet_hash_nolisten(struct sock *sk)
 
        write_lock(lock);
        __sk_add_node(sk, list);
-       sock_prot_inuse_add(sk->sk_prot, 1);
+       sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
        write_unlock(lock);
 }
 EXPORT_SYMBOL_GPL(__inet_hash_nolisten);
 
 static void __inet_hash(struct sock *sk)
 {
-       struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+       struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
        struct hlist_head *list;
        rwlock_t *lock;
 
@@ -348,13 +367,13 @@ static void __inet_hash(struct sock *sk)
                return;
        }
 
-       BUG_TRAP(sk_unhashed(sk));
+       WARN_ON(!sk_unhashed(sk));
        list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
        lock = &hashinfo->lhash_lock;
 
        inet_listen_wlock(hashinfo);
        __sk_add_node(sk, list);
-       sock_prot_inuse_add(sk->sk_prot, 1);
+       sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
        write_unlock(lock);
        wake_up(&hashinfo->lhash_wait);
 }
@@ -372,7 +391,7 @@ EXPORT_SYMBOL_GPL(inet_hash);
 void inet_unhash(struct sock *sk)
 {
        rwlock_t *lock;
-       struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+       struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
 
        if (sk_unhashed(sk))
                goto out;
@@ -387,7 +406,7 @@ void inet_unhash(struct sock *sk)
        }
 
        if (__sk_del_node_init(sk))
-               sock_prot_inuse_add(sk->sk_prot, -1);
+               sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
        write_unlock_bh(lock);
 out:
        if (sk->sk_state == TCP_LISTEN)
@@ -406,7 +425,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
        struct inet_bind_hashbucket *head;
        struct inet_bind_bucket *tb;
        int ret;
-       struct net *net = sk->sk_net;
+       struct net *net = sock_net(sk);
 
        if (!snum) {
                int i, remaining, low, high, port;
@@ -421,7 +440,8 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
                local_bh_disable();
                for (i = 1; i <= remaining; i++) {
                        port = low + (i + offset) % remaining;
-                       head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
+                       head = &hinfo->bhash[inet_bhashfn(net, port,
+                                       hinfo->bhash_size)];
                        spin_lock(&head->lock);
 
                        /* Does not bother with rcv_saddr checks,
@@ -430,7 +450,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
                         */
                        inet_bind_bucket_for_each(tb, node, &head->chain) {
                                if (tb->ib_net == net && tb->port == port) {
-                                       BUG_TRAP(!hlist_empty(&tb->owners));
+                                       WARN_ON(hlist_empty(&tb->owners));
                                        if (tb->fastreuse >= 0)
                                                goto next_port;
                                        if (!check_established(death_row, sk,
@@ -476,7 +496,7 @@ ok:
                goto out;
        }
 
-       head = &hinfo->bhash[inet_bhashfn(snum, hinfo->bhash_size)];
+       head = &hinfo->bhash[inet_bhashfn(net, snum, hinfo->bhash_size)];
        tb  = inet_csk(sk)->icsk_bind_hash;
        spin_lock_bh(&head->lock);
        if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {