mirror of https://gitee.com/openkylin/linux.git
[INET6]: Generalise tcp_v6_hash_connect
Renaming it to inet6_hash_connect, making it possible to ditch dccp_v6_hash_connect and share the same code with TCP instead. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
David S. Miller
parent
a7f5e7f164
commit
d8313f5ca2
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@ -1573,7 +1573,7 @@ u32 secure_ipv4_port_ephemeral(__u32 saddr, __u32 daddr, __u16 dport)
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}
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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u32 secure_tcpv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr, __u16 dport)
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u32 secure_ipv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr, __u16 dport)
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{
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struct keydata *keyptr = get_keyptr();
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u32 hash[12];
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@ -1584,7 +1584,7 @@ u32 secure_tcpv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr, __u16 dp
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return twothirdsMD4Transform(daddr, hash);
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}
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EXPORT_SYMBOL(secure_tcpv6_port_ephemeral);
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EXPORT_SYMBOL(secure_ipv6_port_ephemeral);
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#endif
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#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
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@ -53,8 +53,8 @@ void generate_random_uuid(unsigned char uuid_out[16]);
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extern __u32 secure_ip_id(__u32 daddr);
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extern u32 secure_ipv4_port_ephemeral(__u32 saddr, __u32 daddr, __u16 dport);
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extern u32 secure_tcpv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr,
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__u16 dport);
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extern u32 secure_ipv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr,
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__u16 dport);
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extern __u32 secure_tcp_sequence_number(__u32 saddr, __u32 daddr,
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__u16 sport, __u16 dport);
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extern __u32 secure_tcpv6_sequence_number(__u32 *saddr, __u32 *daddr,
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@ -527,6 +527,9 @@ extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
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extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
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unsigned long arg);
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extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
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struct sock *sk);
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/*
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* reassembly.c
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*/
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171
net/dccp/ipv6.c
171
net/dccp/ipv6.c
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@ -84,175 +84,6 @@ static __u32 dccp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
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dh->dccph_sport);
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}
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static int __dccp_v6_check_established(struct sock *sk, const __u16 lport,
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struct inet_timewait_sock **twp)
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{
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struct inet_sock *inet = inet_sk(sk);
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const struct ipv6_pinfo *np = inet6_sk(sk);
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const struct in6_addr *daddr = &np->rcv_saddr;
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const struct in6_addr *saddr = &np->daddr;
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const int dif = sk->sk_bound_dev_if;
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const u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
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const unsigned int hash = inet6_ehashfn(daddr, inet->num,
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saddr, inet->dport);
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struct inet_ehash_bucket *head = inet_ehash_bucket(&dccp_hashinfo, hash);
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struct sock *sk2;
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const struct hlist_node *node;
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struct inet_timewait_sock *tw;
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prefetch(head->chain.first);
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write_lock(&head->lock);
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/* Check TIME-WAIT sockets first. */
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sk_for_each(sk2, node, &(head + dccp_hashinfo.ehash_size)->chain) {
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const struct inet6_timewait_sock *tw6 = inet6_twsk(sk2);
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tw = inet_twsk(sk2);
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if(*((__u32 *)&(tw->tw_dport)) == ports &&
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sk2->sk_family == PF_INET6 &&
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ipv6_addr_equal(&tw6->tw_v6_daddr, saddr) &&
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ipv6_addr_equal(&tw6->tw_v6_rcv_saddr, daddr) &&
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sk2->sk_bound_dev_if == sk->sk_bound_dev_if)
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goto not_unique;
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}
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tw = NULL;
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/* And established part... */
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sk_for_each(sk2, node, &head->chain) {
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if (INET6_MATCH(sk2, hash, saddr, daddr, ports, dif))
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goto not_unique;
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}
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BUG_TRAP(sk_unhashed(sk));
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__sk_add_node(sk, &head->chain);
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sk->sk_hash = hash;
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sock_prot_inc_use(sk->sk_prot);
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write_unlock(&head->lock);
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if (twp) {
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*twp = tw;
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NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
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} else if (tw) {
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/* Silly. Should hash-dance instead... */
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inet_twsk_deschedule(tw, &dccp_death_row);
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NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
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inet_twsk_put(tw);
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}
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return 0;
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not_unique:
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write_unlock(&head->lock);
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return -EADDRNOTAVAIL;
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}
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static inline u32 dccp_v6_port_offset(const struct sock *sk)
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{
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const struct inet_sock *inet = inet_sk(sk);
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const struct ipv6_pinfo *np = inet6_sk(sk);
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return secure_tcpv6_port_ephemeral(np->rcv_saddr.s6_addr32,
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np->daddr.s6_addr32,
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inet->dport);
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}
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static int dccp_v6_hash_connect(struct sock *sk)
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{
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const unsigned short snum = inet_sk(sk)->num;
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struct inet_bind_hashbucket *head;
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struct inet_bind_bucket *tb;
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int ret;
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if (snum == 0) {
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int low = sysctl_local_port_range[0];
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int high = sysctl_local_port_range[1];
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int range = high - low;
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int i;
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int port;
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static u32 hint;
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u32 offset = hint + dccp_v6_port_offset(sk);
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struct hlist_node *node;
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struct inet_timewait_sock *tw = NULL;
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local_bh_disable();
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for (i = 1; i <= range; i++) {
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port = low + (i + offset) % range;
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head = &dccp_hashinfo.bhash[inet_bhashfn(port,
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dccp_hashinfo.bhash_size)];
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spin_lock(&head->lock);
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/* Does not bother with rcv_saddr checks,
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* because the established check is already
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* unique enough.
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*/
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inet_bind_bucket_for_each(tb, node, &head->chain) {
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if (tb->port == port) {
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BUG_TRAP(!hlist_empty(&tb->owners));
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if (tb->fastreuse >= 0)
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goto next_port;
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if (!__dccp_v6_check_established(sk,
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port,
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&tw))
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goto ok;
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goto next_port;
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}
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}
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tb = inet_bind_bucket_create(dccp_hashinfo.bind_bucket_cachep,
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head, port);
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if (!tb) {
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spin_unlock(&head->lock);
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break;
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}
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tb->fastreuse = -1;
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goto ok;
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next_port:
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spin_unlock(&head->lock);
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}
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local_bh_enable();
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return -EADDRNOTAVAIL;
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ok:
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hint += i;
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/* Head lock still held and bh's disabled */
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inet_bind_hash(sk, tb, port);
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if (sk_unhashed(sk)) {
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inet_sk(sk)->sport = htons(port);
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__inet6_hash(&dccp_hashinfo, sk);
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}
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spin_unlock(&head->lock);
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if (tw) {
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inet_twsk_deschedule(tw, &dccp_death_row);
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inet_twsk_put(tw);
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}
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ret = 0;
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goto out;
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}
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head = &dccp_hashinfo.bhash[inet_bhashfn(snum,
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dccp_hashinfo.bhash_size)];
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tb = inet_csk(sk)->icsk_bind_hash;
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spin_lock_bh(&head->lock);
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if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {
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__inet6_hash(&dccp_hashinfo, sk);
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spin_unlock_bh(&head->lock);
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return 0;
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} else {
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spin_unlock(&head->lock);
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/* No definite answer... Walk to established hash table */
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ret = __dccp_v6_check_established(sk, snum, NULL);
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out:
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local_bh_enable();
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return ret;
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}
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}
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static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
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int addr_len)
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{
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@ -403,7 +234,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
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inet->dport = usin->sin6_port;
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dccp_set_state(sk, DCCP_REQUESTING);
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err = dccp_v6_hash_connect(sk);
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err = inet6_hash_connect(&dccp_death_row, sk);
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if (err)
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goto late_failure;
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/* FIXME */
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@ -5,7 +5,8 @@
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*
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* Generic INET6 transport hashtables
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*
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* Authors: Lotsa people, from code originally in tcp
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* Authors: Lotsa people, from code originally in tcp, generalised here
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* by Arnaldo Carvalho de Melo <acme@mandriva.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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@ -14,12 +15,13 @@
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/random.h>
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#include <net/inet_connection_sock.h>
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#include <net/inet_hashtables.h>
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#include <net/inet6_hashtables.h>
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#include <net/ip.h>
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struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
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const struct in6_addr *daddr,
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@ -79,3 +81,180 @@ struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
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}
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EXPORT_SYMBOL_GPL(inet6_lookup);
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static int __inet6_check_established(struct inet_timewait_death_row *death_row,
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struct sock *sk, const __u16 lport,
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struct inet_timewait_sock **twp)
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{
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struct inet_hashinfo *hinfo = death_row->hashinfo;
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const struct inet_sock *inet = inet_sk(sk);
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const struct ipv6_pinfo *np = inet6_sk(sk);
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const struct in6_addr *daddr = &np->rcv_saddr;
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const struct in6_addr *saddr = &np->daddr;
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const int dif = sk->sk_bound_dev_if;
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const u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
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const unsigned int hash = inet6_ehashfn(daddr, inet->num, saddr,
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inet->dport);
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struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash);
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struct sock *sk2;
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const struct hlist_node *node;
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struct inet_timewait_sock *tw;
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prefetch(head->chain.first);
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write_lock(&head->lock);
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/* Check TIME-WAIT sockets first. */
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sk_for_each(sk2, node, &(head + hinfo->ehash_size)->chain) {
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const struct inet6_timewait_sock *tw6 = inet6_twsk(sk2);
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tw = inet_twsk(sk2);
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if(*((__u32 *)&(tw->tw_dport)) == ports &&
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sk2->sk_family == PF_INET6 &&
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ipv6_addr_equal(&tw6->tw_v6_daddr, saddr) &&
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ipv6_addr_equal(&tw6->tw_v6_rcv_saddr, daddr) &&
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sk2->sk_bound_dev_if == sk->sk_bound_dev_if) {
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if (twsk_unique(sk, sk2, twp))
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goto unique;
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else
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goto not_unique;
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}
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}
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tw = NULL;
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/* And established part... */
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sk_for_each(sk2, node, &head->chain) {
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if (INET6_MATCH(sk2, hash, saddr, daddr, ports, dif))
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goto not_unique;
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}
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unique:
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BUG_TRAP(sk_unhashed(sk));
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__sk_add_node(sk, &head->chain);
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sk->sk_hash = hash;
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sock_prot_inc_use(sk->sk_prot);
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write_unlock(&head->lock);
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if (twp != NULL) {
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*twp = tw;
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NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
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} else if (tw != NULL) {
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/* Silly. Should hash-dance instead... */
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inet_twsk_deschedule(tw, death_row);
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NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
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inet_twsk_put(tw);
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}
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return 0;
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not_unique:
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write_unlock(&head->lock);
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return -EADDRNOTAVAIL;
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}
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static inline u32 inet6_sk_port_offset(const struct sock *sk)
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{
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const struct inet_sock *inet = inet_sk(sk);
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const struct ipv6_pinfo *np = inet6_sk(sk);
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return secure_ipv6_port_ephemeral(np->rcv_saddr.s6_addr32,
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np->daddr.s6_addr32,
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inet->dport);
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}
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int inet6_hash_connect(struct inet_timewait_death_row *death_row,
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struct sock *sk)
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{
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struct inet_hashinfo *hinfo = death_row->hashinfo;
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const unsigned short snum = inet_sk(sk)->num;
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struct inet_bind_hashbucket *head;
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struct inet_bind_bucket *tb;
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int ret;
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if (snum == 0) {
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const int low = sysctl_local_port_range[0];
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const int high = sysctl_local_port_range[1];
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const int range = high - low;
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int i, port;
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static u32 hint;
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const u32 offset = hint + inet6_sk_port_offset(sk);
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struct hlist_node *node;
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struct inet_timewait_sock *tw = NULL;
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local_bh_disable();
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for (i = 1; i <= range; i++) {
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port = low + (i + offset) % range;
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head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
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spin_lock(&head->lock);
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/* Does not bother with rcv_saddr checks,
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* because the established check is already
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* unique enough.
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*/
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inet_bind_bucket_for_each(tb, node, &head->chain) {
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if (tb->port == port) {
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BUG_TRAP(!hlist_empty(&tb->owners));
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if (tb->fastreuse >= 0)
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goto next_port;
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if (!__inet6_check_established(death_row,
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sk, port,
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&tw))
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goto ok;
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goto next_port;
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}
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}
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tb = inet_bind_bucket_create(hinfo->bind_bucket_cachep,
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head, port);
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if (!tb) {
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spin_unlock(&head->lock);
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break;
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}
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tb->fastreuse = -1;
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goto ok;
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next_port:
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spin_unlock(&head->lock);
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}
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local_bh_enable();
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return -EADDRNOTAVAIL;
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ok:
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hint += i;
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/* Head lock still held and bh's disabled */
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inet_bind_hash(sk, tb, port);
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if (sk_unhashed(sk)) {
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inet_sk(sk)->sport = htons(port);
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__inet6_hash(hinfo, sk);
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}
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spin_unlock(&head->lock);
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if (tw) {
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inet_twsk_deschedule(tw, death_row);
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inet_twsk_put(tw);
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}
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ret = 0;
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goto out;
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}
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head = &hinfo->bhash[inet_bhashfn(snum, hinfo->bhash_size)];
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tb = inet_csk(sk)->icsk_bind_hash;
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spin_lock_bh(&head->lock);
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if (sk_head(&tb->owners) == sk && sk->sk_bind_node.next == NULL) {
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__inet6_hash(hinfo, sk);
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spin_unlock_bh(&head->lock);
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return 0;
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} else {
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spin_unlock(&head->lock);
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/* No definite answer... Walk to established hash table */
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ret = __inet6_check_established(death_row, sk, snum, NULL);
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out:
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local_bh_enable();
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return ret;
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}
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}
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|
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EXPORT_SYMBOL_GPL(inet6_hash_connect);
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|
|
|
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|
|
@ -119,177 +119,6 @@ static __u32 tcp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
|
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}
|
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}
|
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|
||||
static int __tcp_v6_check_established(struct sock *sk, const __u16 lport,
|
||||
struct inet_timewait_sock **twp)
|
||||
{
|
||||
struct inet_sock *inet = inet_sk(sk);
|
||||
const struct ipv6_pinfo *np = inet6_sk(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);
|
||||
unsigned int hash = inet6_ehashfn(daddr, inet->num, saddr, inet->dport);
|
||||
struct inet_ehash_bucket *head = inet_ehash_bucket(&tcp_hashinfo, hash);
|
||||
struct sock *sk2;
|
||||
const struct hlist_node *node;
|
||||
struct inet_timewait_sock *tw;
|
||||
|
||||
prefetch(head->chain.first);
|
||||
write_lock(&head->lock);
|
||||
|
||||
/* Check TIME-WAIT sockets first. */
|
||||
sk_for_each(sk2, node, &(head + tcp_hashinfo.ehash_size)->chain) {
|
||||
const struct inet6_timewait_sock *tw6 = inet6_twsk(sk2);
|
||||
|
||||
tw = inet_twsk(sk2);
|
||||
|
||||
if(*((__u32 *)&(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) &&
|
||||
sk2->sk_bound_dev_if == sk->sk_bound_dev_if) {
|
||||
if (twsk_unique(sk, sk2, twp))
|
||||
goto unique;
|
||||
else
|
||||
goto not_unique;
|
||||
}
|
||||
}
|
||||
tw = NULL;
|
||||
|
||||
/* And established part... */
|
||||
sk_for_each(sk2, node, &head->chain) {
|
||||
if (INET6_MATCH(sk2, hash, saddr, daddr, ports, dif))
|
||||
goto not_unique;
|
||||
}
|
||||
|
||||
unique:
|
||||
BUG_TRAP(sk_unhashed(sk));
|
||||
__sk_add_node(sk, &head->chain);
|
||||
sk->sk_hash = hash;
|
||||
sock_prot_inc_use(sk->sk_prot);
|
||||
write_unlock(&head->lock);
|
||||
|
||||
if (twp) {
|
||||
*twp = tw;
|
||||
NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
|
||||
} else if (tw) {
|
||||
/* Silly. Should hash-dance instead... */
|
||||
inet_twsk_deschedule(tw, &tcp_death_row);
|
||||
NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
|
||||
|
||||
inet_twsk_put(tw);
|
||||
}
|
||||
return 0;
|
||||
|
||||
not_unique:
|
||||
write_unlock(&head->lock);
|
||||
return -EADDRNOTAVAIL;
|
||||
}
|
||||
|
||||
static inline u32 tcpv6_port_offset(const struct sock *sk)
|
||||
{
|
||||
const struct inet_sock *inet = inet_sk(sk);
|
||||
const struct ipv6_pinfo *np = inet6_sk(sk);
|
||||
|
||||
return secure_tcpv6_port_ephemeral(np->rcv_saddr.s6_addr32,
|
||||
np->daddr.s6_addr32,
|
||||
inet->dport);
|
||||
}
|
||||
|
||||
static int tcp_v6_hash_connect(struct sock *sk)
|
||||
{
|
||||
unsigned short snum = inet_sk(sk)->num;
|
||||
struct inet_bind_hashbucket *head;
|
||||
struct inet_bind_bucket *tb;
|
||||
int ret;
|
||||
|
||||
if (!snum) {
|
||||
int low = sysctl_local_port_range[0];
|
||||
int high = sysctl_local_port_range[1];
|
||||
int range = high - low;
|
||||
int i;
|
||||
int port;
|
||||
static u32 hint;
|
||||
u32 offset = hint + tcpv6_port_offset(sk);
|
||||
struct hlist_node *node;
|
||||
struct inet_timewait_sock *tw = NULL;
|
||||
|
||||
local_bh_disable();
|
||||
for (i = 1; i <= range; i++) {
|
||||
port = low + (i + offset) % range;
|
||||
head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)];
|
||||
spin_lock(&head->lock);
|
||||
|
||||
/* 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 (!__tcp_v6_check_established(sk,
|
||||
port,
|
||||
&tw))
|
||||
goto ok;
|
||||
goto next_port;
|
||||
}
|
||||
}
|
||||
|
||||
tb = inet_bind_bucket_create(tcp_hashinfo.bind_bucket_cachep, head, port);
|
||||
if (!tb) {
|
||||
spin_unlock(&head->lock);
|
||||
break;
|
||||
}
|
||||
tb->fastreuse = -1;
|
||||
goto ok;
|
||||
|
||||
next_port:
|
||||
spin_unlock(&head->lock);
|
||||
}
|
||||
local_bh_enable();
|
||||
|
||||
return -EADDRNOTAVAIL;
|
||||
|
||||
ok:
|
||||
hint += i;
|
||||
|
||||
/* 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(&tcp_hashinfo, sk);
|
||||
}
|
||||
spin_unlock(&head->lock);
|
||||
|
||||
if (tw) {
|
||||
inet_twsk_deschedule(tw, &tcp_death_row);
|
||||
inet_twsk_put(tw);
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
goto out;
|
||||
}
|
||||
|
||||
head = &tcp_hashinfo.bhash[inet_bhashfn(snum, tcp_hashinfo.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) {
|
||||
__inet6_hash(&tcp_hashinfo, sk);
|
||||
spin_unlock_bh(&head->lock);
|
||||
return 0;
|
||||
} else {
|
||||
spin_unlock(&head->lock);
|
||||
/* No definite answer... Walk to established hash table */
|
||||
ret = __tcp_v6_check_established(sk, snum, NULL);
|
||||
out:
|
||||
local_bh_enable();
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
|
||||
int addr_len)
|
||||
{
|
||||
|
|
@ -450,7 +279,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
|
|||
inet->dport = usin->sin6_port;
|
||||
|
||||
tcp_set_state(sk, TCP_SYN_SENT);
|
||||
err = tcp_v6_hash_connect(sk);
|
||||
err = inet6_hash_connect(&tcp_death_row, sk);
|
||||
if (err)
|
||||
goto late_failure;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue