[TCP]: Convert highest_sack to sk_buff to allow direct access

[pandora-kernel.git] / include / linux / tcp.h

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 18a468d..34acee6 100644 (file)
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -178,6 +178,21 @@ struct tcp_md5sig {
 #include <net/inet_connection_sock.h>
 #include <net/inet_timewait_sock.h>
 
+static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb)
+{
+       return (struct tcphdr *)skb_transport_header(skb);
+}
+
+static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
+{
+       return tcp_hdr(skb)->doff * 4;
+}
+
+static inline unsigned int tcp_optlen(const struct sk_buff *skb)
+{
+       return (tcp_hdr(skb)->doff - 5) * 4;
+}
+
 /* This defines a selective acknowledgement block. */
 struct tcp_sack_block_wire {
        __be32  start_seq;
@@ -289,7 +304,6 @@ struct tcp_sock {
        u32     rtt_seq;        /* sequence number to update rttvar     */
 
        u32     packets_out;    /* Packets which are "in flight"        */
-       u32     left_out;       /* Packets which leaved network */
        u32     retrans_out;    /* Retransmitted packets out            */
 /*
  *      Options received (usually on last packet, some only on SYN packets).
@@ -301,7 +315,7 @@ struct tcp_sock {
  */
        u32     snd_ssthresh;   /* Slow start size threshold            */
        u32     snd_cwnd;       /* Sending congestion window            */
-       u16     snd_cwnd_cnt;   /* Linear increase counter              */
+       u32     snd_cwnd_cnt;   /* Linear increase counter              */
        u32     snd_cwnd_clamp; /* Do not allow snd_cwnd to grow above this */
        u32     snd_cwnd_used;
        u32     snd_cwnd_stamp;
@@ -318,6 +332,11 @@ struct tcp_sock {
 
        struct tcp_sack_block_wire recv_sack_cache[4];
 
+       struct sk_buff *highest_sack;   /* highest skb with SACK received
+                                        * (validity guaranteed only if
+                                        * sacked_out > 0)
+                                        */
+
        /* from STCP, retrans queue hinting */
        struct sk_buff* lost_skb_hint;
 
@@ -326,10 +345,12 @@ struct tcp_sock {
        struct sk_buff *forward_skb_hint;
        struct sk_buff *fastpath_skb_hint;
 
-       int     fastpath_cnt_hint;
+       int     fastpath_cnt_hint;      /* Lags behind by current skb's pcount
+                                        * compared to respective fackets_out */
        int     lost_cnt_hint;
        int     retransmit_cnt_hint;
-       int     forward_cnt_hint;
+
+       u32     lost_retrans_low;       /* Sent seq after any rxmit (lowest) */
 
        u16     advmss;         /* Advertised MSS                       */
        u16     prior_ssthresh; /* ssthresh saved at recovery start     */