1 files changed, 23 insertions, 55 deletions

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 14a55e3e3a50..dfd93d03f5d2 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -127,6 +127,7 @@ enum {
 #define TCP_WINDOW_CLAMP        10      /* Bound advertised window */
 #define TCP_INFO                11      /* Information about this connection. */
 #define TCP_QUICKACK            12      /* Block/reenable quick acks */
+#define TCP_CONGESTION          13      /* Congestion control algorithm */
 
 #define TCPI_OPT_TIMESTAMPS     1
 #define TCPI_OPT_SACK           2
@@ -203,13 +204,6 @@ struct tcp_sack_block {
         __u32   end_seq;
 };
 
-enum tcp_congestion_algo {
-        TCP_RENO=0,
-        TCP_VEGAS,
-        TCP_WESTWOOD,
-        TCP_BIC,
-};
-
 struct tcp_options_received {
 /*      PAWS/RTTM data  */
         long    ts_recent_stamp;/* Time we stored ts_recent (for aging) */
@@ -230,6 +224,17 @@ struct tcp_options_received {
         __u16   mss_clamp;      /* Maximal mss, negotiated at connection setup */
 };
 
+struct tcp_request_sock {
+        struct inet_request_sock req;
+        __u32                    rcv_isn;
+        __u32                    snt_isn;
+};
+
+static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req)
+{
+        return (struct tcp_request_sock *)req;
+}
+
 struct tcp_sock {
         /* inet_sock has to be the first member of tcp_sock */
         struct inet_sock        inet;
@@ -294,7 +299,7 @@ struct tcp_sock {
         __u8    reordering;     /* Packet reordering metric.            */
         __u8    frto_counter;   /* Number of new acks after RTO */
 
-        __u8    adv_cong;       /* Using Vegas, Westwood, or BIC */
+        __u8    unused;
         __u8    defer_accept;   /* User waits for some data after accept() */
 
 /* RTT measurement */
@@ -368,22 +373,7 @@ struct tcp_sock {
 
         __u32   total_retrans;  /* Total retransmits for entire connection */
 
-        /* The syn_wait_lock is necessary only to avoid proc interface having
-         * to grab the main lock sock while browsing the listening hash
-         * (otherwise it's deadlock prone).
-         * This lock is acquired in read mode only from listening_get_next()
-         * and it's acquired in write mode _only_ from code that is actively
-         * changing the syn_wait_queue. All readers that are holding
-         * the master sock lock don't need to grab this lock in read mode
-         * too as the syn_wait_queue writes are always protected from
-         * the main sock lock.
-         */
-        rwlock_t                syn_wait_lock;
-        struct tcp_listen_opt   *listen_opt;
-
-        /* FIFO of established children */
-        struct open_request     *accept_queue;
-        struct open_request     *accept_queue_tail;
+        struct request_sock_queue accept_queue; /* FIFO of established children */
 
         unsigned int            keepalive_time;   /* time before keep alive takes place */
         unsigned int            keepalive_intvl;  /* time interval between keep alive probes */
@@ -405,37 +395,10 @@ struct tcp_sock {
                 __u32   time;
         } rcvq_space;
 
-/* TCP Westwood structure */
-        struct {
-                __u32    bw_ns_est;        /* first bandwidth estimation..not too smoothed 8) */
-                __u32    bw_est;           /* bandwidth estimate */
-                __u32    rtt_win_sx;       /* here starts a new evaluation... */
-                __u32    bk;
-                __u32    snd_una;          /* used for evaluating the number of acked bytes */
-                __u32    cumul_ack;
-                __u32    accounted;
-                __u32    rtt;
-                __u32    rtt_min;          /* minimum observed RTT */
-        } westwood;
-
-/* Vegas variables */
-        struct {
-                __u32   beg_snd_nxt;    /* right edge during last RTT */
-                __u32   beg_snd_una;    /* left edge  during last RTT */
-                __u32   beg_snd_cwnd;   /* saves the size of the cwnd */
-                __u8    doing_vegas_now;/* if true, do vegas for this RTT */
-                __u16   cntRTT;         /* # of RTTs measured within last RTT */
-                __u32   minRTT;         /* min of RTTs measured within last RTT (in usec) */
-                __u32   baseRTT;        /* the min of all Vegas RTT measurements seen (in usec) */
-        } vegas;
-
-        /* BI TCP Parameters */
-        struct {
-                __u32   cnt;            /* increase cwnd by 1 after this number of ACKs */
-                __u32   last_max_cwnd;  /* last maximium snd_cwnd */
-                __u32   last_cwnd;      /* the last snd_cwnd */
-                __u32   last_stamp;     /* time when updated last_cwnd */
-        } bictcp;
+        /* Pluggable TCP congestion control hook */
+        struct tcp_congestion_ops *ca_ops;
+        u32     ca_priv[16];
+#define TCP_CA_PRIV_SIZE        (16*sizeof(u32))
 };
 
 static inline struct tcp_sock *tcp_sk(const struct sock *sk)
@@ -443,6 +406,11 @@ static inline struct tcp_sock *tcp_sk(const struct sock *sk)
         return (struct tcp_sock *)sk;
 }
 
+static inline void *tcp_ca(const struct tcp_sock *tp)
+{
+        return (void *) tp->ca_priv;
+}
+
 #endif
 
 #endif  /* _LINUX_TCP_H */