[TCP] Westwood: comment fixes

Cleanup some comments and add more references

Signed-off-by: Luca De Cicco <ldecicco@gmail.com>
Signed-off-by: Stephen Hemminger <shemminger@dxpl.pdx.osdl.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/tcp_westwood.c b/net/ipv4/tcp_westwood.c
index 62a96b71b0dd733fb5587729456180d27986d7d6..12a2cd976e3a06b33edfe08e4d749ac309027506 100644 (file)
--- a/net/ipv4/tcp_westwood.c
+++ b/net/ipv4/tcp_westwood.c
@@ -1,7 +1,24 @@
 /*
- * TCP Westwood+
+ * TCP Westwood+: end-to-end bandwidth estimation for TCP
  *
- *     Angelo Dell'Aera:       TCP Westwood+ support
+ *      Angelo Dell'Aera: author of the first version of TCP Westwood+ in Linux 2.4
+ *
+ * Support at http://c3lab.poliba.it/index.php/Westwood
+ * Main references in literature:
+ *
+ * - Mascolo S, Casetti, M. Gerla et al.
+ *   "TCP Westwood: bandwidth estimation for TCP" Proc. ACM Mobicom 2001
+ *
+ * - A. Grieco, s. Mascolo
+ *   "Performance evaluation of New Reno, Vegas, Westwood+ TCP" ACM Computer
+ *     Comm. Review, 2004
+ *
+ * - A. Dell'Aera, L. Grieco, S. Mascolo.
+ *   "Linux 2.4 Implementation of Westwood+ TCP with Rate-Halving :
+ *    A Performance Evaluation Over the Internet" (ICC 2004), Paris, June 2004
+ *
+ * Westwood+ employs end-to-end bandwidth measurement to set cwnd and
+ * ssthresh after packet loss. The probing phase is as the original Reno.
  */
 
 #include <linux/config.h>
@@ -93,7 +110,7 @@ static void westwood_update_window(struct sock *sk)
        struct westwood *w = inet_csk_ca(sk);
        s32 delta = tcp_time_stamp - w->rtt_win_sx;
 
-       /* Initialise w->snd_una with the first acked sequence number in order
+       /* Initialize w->snd_una with the first acked sequence number in order
         * to fix mismatch between tp->snd_una and w->snd_una for the first
         * bandwidth sample
         */
@@ -191,7 +208,7 @@ static void tcp_westwood_event(struct sock *sk, enum tcp_ca_event event)
 {
        struct tcp_sock *tp = tcp_sk(sk);
        struct westwood *w = inet_csk_ca(sk);
-       
+
        switch(event) {
        case CA_EVENT_FAST_ACK:
                westwood_fast_bw(sk);