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tcp: add in_flight to tcp_skb_cb

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Add in_flight (bytes in flight when packet was sent) field
to tx component of tcp_skb_cb and make it available to
congestion modules' pkts_acked() function through the
ack_sample function argument.

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lawrence Brakmo
2016-06-08 21:16:44 -07:00
committed by David S. Miller
parent 3e7fb80b60
commit 6f094b9ec6
3 changed files with 9 additions and 2 deletions
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2
include/net/tcp.h
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@@ -767,6 +767,7 @@ struct tcp_skb_cb {
union {
struct {
/* There is space for up to 20 bytes */
__u32 in_flight;/* Bytes in flight when packet sent */
} tx; /* only used for outgoing skbs */
union {
struct inet_skb_parm h4;
@@ -859,6 +860,7 @@ union tcp_cc_info;
struct ack_sample {
u32 pkts_acked;
s32 rtt_us;
u32 in_flight;
};
struct tcp_congestion_ops {