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tcp: new helper for RACK to detect loss

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Create a new helper tcp_rack_detect_loss to prepare the upcoming
RACK reordering timer patch.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuchung Cheng
2017-01-12 22:11:31 -08:00
committed by David S. Miller
parent db8da6bb57
commit e636f8b010
3 changed files with 22 additions and 15 deletions
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3
include/net/tcp.h
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@@ -1863,8 +1863,7 @@ extern int sysctl_tcp_recovery;
/* Use TCP RACK to detect (some) tail and retransmit losses */
#define TCP_RACK_LOST_RETRANS 0x1
extern int tcp_rack_mark_lost(struct sock *sk);
extern void tcp_rack_mark_lost(struct sock *sk);
extern void tcp_rack_advance(struct tcp_sock *tp,
const struct skb_mstamp *xmit_time, u8 sacked);