* 2 of the License, or (at your option) any later version.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/random.h>
#include <net/inet6_hashtables.h>
#include <net/ip.h>
+void __inet6_hash(struct inet_hashinfo *hashinfo,
+ struct sock *sk)
+{
+ struct hlist_head *list;
+ rwlock_t *lock;
+
+ BUG_TRAP(sk_unhashed(sk));
+
+ if (sk->sk_state == TCP_LISTEN) {
+ list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
+ lock = &hashinfo->lhash_lock;
+ inet_listen_wlock(hashinfo);
+ } else {
+ unsigned int hash;
+ sk->sk_hash = hash = inet6_sk_ehashfn(sk);
+ hash &= (hashinfo->ehash_size - 1);
+ list = &hashinfo->ehash[hash].chain;
+ lock = &hashinfo->ehash[hash].lock;
+ write_lock(lock);
+ }
+
+ __sk_add_node(sk, list);
+ sock_prot_inc_use(sk->sk_prot);
+ write_unlock(lock);
+}
+EXPORT_SYMBOL(__inet6_hash);
+
+/*
+ * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
+ * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
+ *
+ * The sockhash lock must be held as a reader here.
+ */
+struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *saddr,
+ const __be16 sport,
+ const struct in6_addr *daddr,
+ const u16 hnum,
+ const int dif)
+{
+ struct sock *sk;
+ const struct hlist_node *node;
+ const __portpair ports = INET_COMBINED_PORTS(sport, hnum);
+ /* Optimize here for direct hit, only listening connections can
+ * have wildcards anyways.
+ */
+ unsigned int hash = inet6_ehashfn(daddr, hnum, saddr, sport);
+ struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash);
+
+ prefetch(head->chain.first);
+ read_lock(&head->lock);
+ sk_for_each(sk, node, &head->chain) {
+ /* For IPV6 do the cheaper port and family tests first. */
+ if (INET6_MATCH(sk, hash, saddr, daddr, ports, dif))
+ goto hit; /* You sunk my battleship! */
+ }
+ /* Must check for a TIME_WAIT'er before going to listener hash. */
+ sk_for_each(sk, node, &head->twchain) {
+ const struct inet_timewait_sock *tw = inet_twsk(sk);
+
+ if(*((__portpair *)&(tw->tw_dport)) == ports &&
+ sk->sk_family == PF_INET6) {
+ const struct inet6_timewait_sock *tw6 = inet6_twsk(sk);
+
+ if (ipv6_addr_equal(&tw6->tw_v6_daddr, saddr) &&
+ ipv6_addr_equal(&tw6->tw_v6_rcv_saddr, daddr) &&
+ (!sk->sk_bound_dev_if || sk->sk_bound_dev_if == dif))
+ goto hit;
+ }
+ }
+ read_unlock(&head->lock);
+ return NULL;
+
+hit:
+ sock_hold(sk);
+ read_unlock(&head->lock);
+ return sk;
+}
+EXPORT_SYMBOL(__inet6_lookup_established);
+
struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
const struct in6_addr *daddr,
const unsigned short hnum, const int dif)
sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
const struct ipv6_pinfo *np = inet6_sk(sk);
-
+
score = 1;
if (!ipv6_addr_any(&np->rcv_saddr)) {
if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
EXPORT_SYMBOL_GPL(inet6_lookup_listener);
struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
- const struct in6_addr *saddr, const u16 sport,
- const struct in6_addr *daddr, const u16 dport,
+ const struct in6_addr *saddr, const __be16 sport,
+ const struct in6_addr *daddr, const __be16 dport,
const int dif)
{
struct sock *sk;
const struct in6_addr *daddr = &np->rcv_saddr;
const struct in6_addr *saddr = &np->daddr;
const int dif = sk->sk_bound_dev_if;
- const u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
- const unsigned int hash = inet6_ehashfn(daddr, inet->num, saddr,
+ const __portpair ports = INET_COMBINED_PORTS(inet->dport, lport);
+ const unsigned int hash = inet6_ehashfn(daddr, lport, saddr,
inet->dport);
struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash);
struct sock *sk2;
write_lock(&head->lock);
/* Check TIME-WAIT sockets first. */
- sk_for_each(sk2, node, &(head + hinfo->ehash_size)->chain) {
+ sk_for_each(sk2, node, &head->twchain) {
const struct inet6_timewait_sock *tw6 = inet6_twsk(sk2);
tw = inet_twsk(sk2);
- if(*((__u32 *)&(tw->tw_dport)) == ports &&
+ if(*((__portpair *)&(tw->tw_dport)) == ports &&
sk2->sk_family == PF_INET6 &&
ipv6_addr_equal(&tw6->tw_v6_daddr, saddr) &&
ipv6_addr_equal(&tw6->tw_v6_rcv_saddr, daddr) &&
{
struct inet_hashinfo *hinfo = death_row->hashinfo;
const unsigned short snum = inet_sk(sk)->num;
- struct inet_bind_hashbucket *head;
- struct inet_bind_bucket *tb;
+ struct inet_bind_hashbucket *head;
+ struct inet_bind_bucket *tb;
int ret;
- if (snum == 0) {
- const int low = sysctl_local_port_range[0];
- const int high = sysctl_local_port_range[1];
+ if (snum == 0) {
+ const int low = sysctl_local_port_range[0];
+ const int high = sysctl_local_port_range[1];
const int range = high - low;
- int i, port;
+ int i, port;
static u32 hint;
const u32 offset = hint + inet6_sk_port_offset(sk);
struct hlist_node *node;
- struct inet_timewait_sock *tw = NULL;
+ struct inet_timewait_sock *tw = NULL;
- local_bh_disable();
+ local_bh_disable();
for (i = 1; i <= range; i++) {
port = low + (i + offset) % range;
- head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
- spin_lock(&head->lock);
+ head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
+ spin_lock(&head->lock);
- /* Does not bother with rcv_saddr checks,
- * because the established check is already
- * unique enough.
- */
+ /* Does not bother with rcv_saddr checks,
+ * because the established check is already
+ * unique enough.
+ */
inet_bind_bucket_for_each(tb, node, &head->chain) {
- if (tb->port == port) {
- BUG_TRAP(!hlist_empty(&tb->owners));
- if (tb->fastreuse >= 0)
- goto next_port;
- if (!__inet6_check_established(death_row,
+ if (tb->port == port) {
+ BUG_TRAP(!hlist_empty(&tb->owners));
+ if (tb->fastreuse >= 0)
+ goto next_port;
+ if (!__inet6_check_established(death_row,
sk, port,
&tw))
- goto ok;
- goto next_port;
- }
- }
+ goto ok;
+ goto next_port;
+ }
+ }
- tb = inet_bind_bucket_create(hinfo->bind_bucket_cachep,
+ tb = inet_bind_bucket_create(hinfo->bind_bucket_cachep,
head, port);
- if (!tb) {
- spin_unlock(&head->lock);
- break;
- }
- tb->fastreuse = -1;
- goto ok;
+ if (!tb) {
+ spin_unlock(&head->lock);
+ break;
+ }
+ tb->fastreuse = -1;
+ goto ok;
- next_port:
- spin_unlock(&head->lock);
- }
- local_bh_enable();
+ next_port:
+ spin_unlock(&head->lock);
+ }
+ local_bh_enable();
- return -EADDRNOTAVAIL;
+ return -EADDRNOTAVAIL;
ok:
hint += i;
- /* Head lock still held and bh's disabled */
- inet_bind_hash(sk, tb, port);
+ /* Head lock still held and bh's disabled */
+ inet_bind_hash(sk, tb, port);
if (sk_unhashed(sk)) {
- inet_sk(sk)->sport = htons(port);
- __inet6_hash(hinfo, sk);
- }
- spin_unlock(&head->lock);
+ inet_sk(sk)->sport = htons(port);
+ __inet6_hash(hinfo, sk);
+ }
+ spin_unlock(&head->lock);
- if (tw) {
- inet_twsk_deschedule(tw, death_row);
- inet_twsk_put(tw);
- }
+ if (tw) {
+ inet_twsk_deschedule(tw, death_row);
+ inet_twsk_put(tw);
+ }
ret = 0;
goto out;
- }
+ }
- head = &hinfo->bhash[inet_bhashfn(snum, hinfo->bhash_size)];
- tb = inet_csk(sk)->icsk_bind_hash;
+ head = &hinfo->bhash[inet_bhashfn(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 == NULL) {