[TCP]: Congestion control API update.
Do some simple changes to make congestion control API faster/cleaner.
* use ktime_t rather than timeval
* merge rtt sampling into existing ack callback
this means one indirect call versus two per ack.
* use flags bits to store options/settings
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 50f6f6a..2694cb3 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1569,6 +1569,11 @@
skb->tstamp = ktime_get_real();
}
+static inline ktime_t net_timedelta(ktime_t t)
+{
+ return ktime_sub(ktime_get_real(), t);
+}
+
extern __sum16 __skb_checksum_complete_head(struct sk_buff *skb, int len);
extern __sum16 __skb_checksum_complete(struct sk_buff *skb);
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 43910fe..a385797 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -629,9 +629,12 @@
#define TCP_CA_MAX 128
#define TCP_CA_BUF_MAX (TCP_CA_NAME_MAX*TCP_CA_MAX)
+#define TCP_CONG_NON_RESTRICTED 0x1
+#define TCP_CONG_RTT_STAMP 0x2
+
struct tcp_congestion_ops {
struct list_head list;
- int non_restricted;
+ unsigned long flags;
/* initialize private data (optional) */
void (*init)(struct sock *sk);
@@ -645,8 +648,6 @@
/* do new cwnd calculation (required) */
void (*cong_avoid)(struct sock *sk, u32 ack,
u32 rtt, u32 in_flight, int good_ack);
- /* round trip time sample per acked packet (optional) */
- void (*rtt_sample)(struct sock *sk, u32 usrtt);
/* call before changing ca_state (optional) */
void (*set_state)(struct sock *sk, u8 new_state);
/* call when cwnd event occurs (optional) */
@@ -654,7 +655,7 @@
/* new value of cwnd after loss (optional) */
u32 (*undo_cwnd)(struct sock *sk);
/* hook for packet ack accounting (optional) */
- void (*pkts_acked)(struct sock *sk, u32 num_acked);
+ void (*pkts_acked)(struct sock *sk, u32 num_acked, ktime_t last);
/* get info for inet_diag (optional) */
void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb);