- /* All sockets in TCP_LISTEN state will be in here. This is the only
- * table where wildcard'd TCP sockets can exist. Hash function here
- * is just local port number.
- */
- struct hlist_head __tcp_listening_hash[TCP_LHTABLE_SIZE];
-
- /* All the above members are written once at bootup and
- * never written again _or_ are predominantly read-access.
- *
- * Now align to a new cache line as all the following members
- * are often dirty.
- */
- rwlock_t __tcp_lhash_lock ____cacheline_aligned;
- atomic_t __tcp_lhash_users;
- wait_queue_head_t __tcp_lhash_wait;
- spinlock_t __tcp_portalloc_lock;
-} tcp_hashinfo;
-
-#define tcp_ehash (tcp_hashinfo.__tcp_ehash)
-#define tcp_bhash (tcp_hashinfo.__tcp_bhash)
-#define tcp_ehash_size (tcp_hashinfo.__tcp_ehash_size)
-#define tcp_bhash_size (tcp_hashinfo.__tcp_bhash_size)
-#define tcp_listening_hash (tcp_hashinfo.__tcp_listening_hash)
-#define tcp_lhash_lock (tcp_hashinfo.__tcp_lhash_lock)
-#define tcp_lhash_users (tcp_hashinfo.__tcp_lhash_users)
-#define tcp_lhash_wait (tcp_hashinfo.__tcp_lhash_wait)
-#define tcp_portalloc_lock (tcp_hashinfo.__tcp_portalloc_lock)
-
-/* SLAB cache for TCP socks */
-extern kmem_cache_t *tcp_sk_cachep;
-
-extern kmem_cache_t *tcp_bucket_cachep;
-extern struct tcp_bind_bucket *tcp_bucket_create(struct tcp_bind_hashbucket *head,
- unsigned short snum);
-extern void tcp_bucket_destroy(struct tcp_bind_bucket *tb);
-extern void tcp_bucket_unlock(struct sock *sk);
-extern int tcp_port_rover;
-extern struct sock *tcp_v4_lookup_listener(u32 addr, unsigned short hnum, int dif);
-
-/* These are AF independent. */
-static __inline__ int tcp_bhashfn(__u16 lport)
-{
- return (lport & (tcp_bhash_size - 1));
-}
-
-extern void tcp_bind_hash(struct sock *sk, struct tcp_bind_bucket *tb,
- unsigned short snum);
-
-#if (BITS_PER_LONG == 64)
-#define TCP_ADDRCMP_ALIGN_BYTES 8
-#else
-#define TCP_ADDRCMP_ALIGN_BYTES 4
-#endif
-
-/* This is a TIME_WAIT bucket. It works around the memory consumption
- * problems of sockets in such a state on heavily loaded servers, but
- * without violating the protocol specification.
- */
-struct tcp_tw_bucket {
- /*
- * Now struct sock also uses sock_common, so please just
- * don't add nothing before this first member (__tw_common) --acme
- */
- struct sock_common __tw_common;
-#define tw_family __tw_common.skc_family
-#define tw_state __tw_common.skc_state
-#define tw_reuse __tw_common.skc_reuse
-#define tw_bound_dev_if __tw_common.skc_bound_dev_if
-#define tw_node __tw_common.skc_node
-#define tw_bind_node __tw_common.skc_bind_node
-#define tw_refcnt __tw_common.skc_refcnt
-#define tw_xid __tw_common.skc_xid
-#define tw_vx_info __tw_common.skc_vx_info
-#define tw_nid __tw_common.skc_nid
-#define tw_nx_info __tw_common.skc_nx_info
- volatile unsigned char tw_substate;
- unsigned char tw_rcv_wscale;
- __u16 tw_sport;
- /* Socket demultiplex comparisons on incoming packets. */
- /* these five are in inet_opt */
- __u32 tw_daddr
- __attribute__((aligned(TCP_ADDRCMP_ALIGN_BYTES)));
- __u32 tw_rcv_saddr;
- __u16 tw_dport;
- __u16 tw_num;
- /* And these are ours. */
- int tw_hashent;
- int tw_timeout;
- __u32 tw_rcv_nxt;
- __u32 tw_snd_nxt;
- __u32 tw_rcv_wnd;
- __u32 tw_ts_recent;
- long tw_ts_recent_stamp;
- unsigned long tw_ttd;
- struct tcp_bind_bucket *tw_tb;
- struct hlist_node tw_death_node;
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- struct in6_addr tw_v6_daddr;
- struct in6_addr tw_v6_rcv_saddr;
- int tw_v6_ipv6only;
-#endif
-};
-
-static __inline__ void tw_add_node(struct tcp_tw_bucket *tw,
- struct hlist_head *list)
-{
- hlist_add_head(&tw->tw_node, list);
-}
-
-static __inline__ void tw_add_bind_node(struct tcp_tw_bucket *tw,
- struct hlist_head *list)
-{
- hlist_add_head(&tw->tw_bind_node, list);
-}
-
-static inline int tw_dead_hashed(struct tcp_tw_bucket *tw)
-{
- return tw->tw_death_node.pprev != NULL;
-}
-
-static __inline__ void tw_dead_node_init(struct tcp_tw_bucket *tw)
-{
- tw->tw_death_node.pprev = NULL;
-}
-
-static __inline__ void __tw_del_dead_node(struct tcp_tw_bucket *tw)
-{
- __hlist_del(&tw->tw_death_node);
- tw_dead_node_init(tw);
-}
-
-static __inline__ int tw_del_dead_node(struct tcp_tw_bucket *tw)
-{
- if (tw_dead_hashed(tw)) {
- __tw_del_dead_node(tw);
- return 1;
- }
- return 0;
-}
-
-#define tw_for_each(tw, node, head) \
- hlist_for_each_entry(tw, node, head, tw_node)
-
-#define tw_for_each_inmate(tw, node, jail) \
- hlist_for_each_entry(tw, node, jail, tw_death_node)
-
-#define tw_for_each_inmate_safe(tw, node, safe, jail) \
- hlist_for_each_entry_safe(tw, node, safe, jail, tw_death_node)
-
-#define tcptw_sk(__sk) ((struct tcp_tw_bucket *)(__sk))
-
-static inline const u32 tcp_v4_rcv_saddr(const struct sock *sk)
-{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- inet_sk(sk)->rcv_saddr : tcptw_sk(sk)->tw_rcv_saddr;
-}
-
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-static inline const struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
-{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- &inet6_sk(sk)->rcv_saddr : &tcptw_sk(sk)->tw_v6_rcv_saddr;
-}
-
-static inline const struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
-{
- return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
-}
-
-#define tcptw_sk_ipv6only(__sk) (tcptw_sk(__sk)->tw_v6_ipv6only)
-
-static inline int tcp_v6_ipv6only(const struct sock *sk)
-{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- ipv6_only_sock(sk) : tcptw_sk_ipv6only(sk);
-}
-#else
-# define __tcp_v6_rcv_saddr(__sk) NULL
-# define tcp_v6_rcv_saddr(__sk) NULL
-# define tcptw_sk_ipv6only(__sk) 0
-# define tcp_v6_ipv6only(__sk) 0
-#endif