tcp: convert retransmit_cnt_hint to seqno

[linux-2.6-omap-h63xx.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index cf54034019d9eafee928bf10b4180cea2c091ed0..d0e90c50722beb661814e9ead4153865c4862a39 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -50,6 +50,7 @@ extern atomic_t tcp_orphan_count;
 extern void tcp_time_wait(struct sock *sk, int state, int timeo);
 
 #define MAX_TCP_HEADER (128 + MAX_HEADER)
+#define MAX_TCP_OPTION_SPACE 40
 
 /* 
  * Never offer a window over 32767 without using window scaling. Some
@@ -184,6 +185,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
 #define TCPOLEN_SACK_BASE_ALIGNED      4
 #define TCPOLEN_SACK_PERBLOCK          8
 #define TCPOLEN_MD5SIG_ALIGNED         20
+#define TCPOLEN_MSS_ALIGNED            4
 
 /* Flags in tp->nonagle */
 #define TCP_NAGLE_OFF          1       /* Nagle's algo is disabled */
@@ -265,13 +267,10 @@ static inline int tcp_too_many_orphans(struct sock *sk, int num)
 
 extern struct proto tcp_prot;
 
-DECLARE_SNMP_STAT(struct tcp_mib, tcp_statistics);
-#define TCP_INC_STATS(field)           SNMP_INC_STATS(tcp_statistics, field)
-#define TCP_INC_STATS_BH(field)                SNMP_INC_STATS_BH(tcp_statistics, field)
-#define TCP_INC_STATS_USER(field)      SNMP_INC_STATS_USER(tcp_statistics, field)
-#define TCP_DEC_STATS(field)           SNMP_DEC_STATS(tcp_statistics, field)
-#define TCP_ADD_STATS_BH(field, val)   SNMP_ADD_STATS_BH(tcp_statistics, field, val)
-#define TCP_ADD_STATS_USER(field, val) SNMP_ADD_STATS_USER(tcp_statistics, field, val)
+#define TCP_INC_STATS(net, field)      SNMP_INC_STATS((net)->mib.tcp_statistics, field)
+#define TCP_INC_STATS_BH(net, field)   SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field)
+#define TCP_DEC_STATS(net, field)      SNMP_DEC_STATS((net)->mib.tcp_statistics, field)
+#define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val)
 
 extern void                    tcp_v4_err(struct sk_buff *skb, u32);
 
@@ -398,6 +397,8 @@ extern void                 tcp_parse_options(struct sk_buff *skb,
                                                  struct tcp_options_received *opt_rx,
                                                  int estab);
 
+extern u8                      *tcp_parse_md5sig_option(struct tcphdr *th);
+
 /*
  *     TCP v4 functions exported for the inet6 API
  */
@@ -471,6 +472,8 @@ extern void tcp_send_delayed_ack(struct sock *sk);
 
 /* tcp_input.c */
 extern void tcp_cwnd_application_limited(struct sock *sk);
+extern void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp,
+                                           struct sk_buff *skb);
 
 /* tcp_timer.c */
 extern void tcp_init_xmit_timers(struct sock *);
@@ -894,7 +897,7 @@ static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
 
                        while ((skb1 = __skb_dequeue(&tp->ucopy.prequeue)) != NULL) {
                                sk->sk_backlog_rcv(sk, skb1);
-                               NET_INC_STATS_BH(LINUX_MIB_TCPPREQUEUEDROPPED);
+                               NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPPREQUEUEDROPPED);
                        }
 
                        tp->ucopy.memory = 0;
@@ -975,7 +978,7 @@ static inline void tcp_openreq_init(struct request_sock *req,
        ireq->rmt_port = tcp_hdr(skb)->source;
 }
 
-extern void tcp_enter_memory_pressure(void);
+extern void tcp_enter_memory_pressure(struct sock *sk);
 
 static inline int keepalive_intvl_when(const struct tcp_sock *tp)
 {
@@ -1024,17 +1027,17 @@ static inline int tcp_paws_check(const struct tcp_options_received *rx_opt, int
 
 #define TCP_CHECK_TIMER(sk) do { } while (0)
 
-static inline void tcp_mib_init(void)
+static inline void tcp_mib_init(struct net *net)
 {
        /* See RFC 2012 */
-       TCP_ADD_STATS_USER(TCP_MIB_RTOALGORITHM, 1);
-       TCP_ADD_STATS_USER(TCP_MIB_RTOMIN, TCP_RTO_MIN*1000/HZ);
-       TCP_ADD_STATS_USER(TCP_MIB_RTOMAX, TCP_RTO_MAX*1000/HZ);
-       TCP_ADD_STATS_USER(TCP_MIB_MAXCONN, -1);
+       TCP_ADD_STATS_USER(net, TCP_MIB_RTOALGORITHM, 1);
+       TCP_ADD_STATS_USER(net, TCP_MIB_RTOMIN, TCP_RTO_MIN*1000/HZ);
+       TCP_ADD_STATS_USER(net, TCP_MIB_RTOMAX, TCP_RTO_MAX*1000/HZ);
+       TCP_ADD_STATS_USER(net, TCP_MIB_MAXCONN, -1);
 }
 
 /* from STCP */
-static inline void tcp_clear_retrans_hints_partial(struct tcp_sock *tp)
+static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp)
 {
        tp->lost_skb_hint = NULL;
        tp->scoreboard_skb_hint = NULL;
@@ -1042,11 +1045,6 @@ static inline void tcp_clear_retrans_hints_partial(struct tcp_sock *tp)
        tp->forward_skb_hint = NULL;
 }
 
-static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp)
-{
-       tcp_clear_retrans_hints_partial(tp);
-}
-
 /* MD5 Signature */
 struct crypto_hash;
 
@@ -1113,14 +1111,12 @@ struct tcp_md5sig_pool {
 #define TCP_MD5SIG_MAXKEYS     (~(u32)0)       /* really?! */
 
 /* - functions */
-extern int                     tcp_v4_calc_md5_hash(char *md5_hash,
-                                                    struct tcp_md5sig_key *key,
-                                                    struct sock *sk,
-                                                    struct dst_entry *dst,
-                                                    struct request_sock *req,
-                                                    struct tcphdr *th,
-                                                    int protocol,
-                                                    unsigned int tcplen);
+extern int                     tcp_v4_md5_hash_skb(char *md5_hash,
+                                                   struct tcp_md5sig_key *key,
+                                                   struct sock *sk,
+                                                   struct request_sock *req,
+                                                   struct sk_buff *skb);
+
 extern struct tcp_md5sig_key   *tcp_v4_md5_lookup(struct sock *sk,
                                                   struct sock *addr_sk);
 
@@ -1132,11 +1128,26 @@ extern int                      tcp_v4_md5_do_add(struct sock *sk,
 extern int                     tcp_v4_md5_do_del(struct sock *sk,
                                                  __be32 addr);
 
+#ifdef CONFIG_TCP_MD5SIG
+#define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_keylen ?                 \
+                                &(struct tcp_md5sig_key) {              \
+                                       .key = (twsk)->tw_md5_key,       \
+                                       .keylen = (twsk)->tw_md5_keylen, \
+                               } : NULL)
+#else
+#define tcp_twsk_md5_key(twsk) NULL
+#endif
+
 extern struct tcp_md5sig_pool  **tcp_alloc_md5sig_pool(void);
 extern void                    tcp_free_md5sig_pool(void);
 
 extern struct tcp_md5sig_pool  *__tcp_get_md5sig_pool(int cpu);
 extern void                    __tcp_put_md5sig_pool(void);
+extern int tcp_md5_hash_header(struct tcp_md5sig_pool *, struct tcphdr *);
+extern int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *, struct sk_buff *,
+                                unsigned header_len);
+extern int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
+                           struct tcp_md5sig_key *key);
 
 static inline
 struct tcp_md5sig_pool         *tcp_get_md5sig_pool(void)
@@ -1348,7 +1359,7 @@ extern void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo);
 extern struct request_sock_ops tcp_request_sock_ops;
 extern struct request_sock_ops tcp6_request_sock_ops;
 
-extern int tcp_v4_destroy_sock(struct sock *sk);
+extern void tcp_v4_destroy_sock(struct sock *sk);
 
 extern int tcp_v4_gso_send_check(struct sk_buff *skb);
 extern struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features);
@@ -1366,11 +1377,8 @@ struct tcp_sock_af_ops {
        int                     (*calc_md5_hash) (char *location,
                                                  struct tcp_md5sig_key *md5,
                                                  struct sock *sk,
-                                                 struct dst_entry *dst,
                                                  struct request_sock *req,
-                                                 struct tcphdr *th,
-                                                 int protocol,
-                                                 unsigned int len);
+                                                 struct sk_buff *skb);
        int                     (*md5_add) (struct sock *sk,
                                            struct sock *addr_sk,
                                            u8 *newkey,