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[TCP]: Prior_fackets can be replaced by highest_sack seq

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Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilpo Järvinen 2007-11-15 19:43:56 -08:00 committed by David S. Miller
parent 9f58f3b721
commit b7d4815f35
1 changed files with 2 additions and 3 deletions
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5
net/ipv4/tcp_input.c
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@ -1251,7 +1251,6 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
struct sk_buff *cached_skb;
int num_sacks = (ptr[1] - TCPOLEN_SACK_BASE)>>3;
int reord = tp->packets_out;
int prior_fackets;
int flag = 0;
int found_dup_sack = 0;
int cached_fack_count;
@ -1264,7 +1263,6 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
tp->fackets_out = 0;
tp->highest_sack = tcp_write_queue_head(sk);
}
prior_fackets = tp->fackets_out;
found_dup_sack = tcp_check_dsack(tp, ack_skb, sp,
num_sacks, prior_snd_una);
@ -1457,7 +1455,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
/* New sack for not retransmitted frame,
* which was in hole. It is reordering.
*/
if (fack_count < prior_fackets)
if (before(TCP_SKB_CB(skb)->seq,
tcp_highest_sack_seq(tp)))
reord = min(fack_count, reord);
/* SACK enhanced F-RTO (RFC4138; Appendix B) */