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[TCP]: Convert highest_sack to sk_buff to allow direct access

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It is going to replace the sack fastpath hint quite soon... :-)

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 19:41:46 -08:00 • committed by David S. Miller
parent 85cc391c0e
commit a47e5a988a
4 changed files with 30 additions and 17 deletions
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12
net/ipv4/tcp_input.c
View file

@ -1245,7 +1245,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
int num_sacks = (ptr[1] - TCPOLEN_SACK_BASE)>>3;
int reord = tp->packets_out;
int prior_fackets;
u32 highest_sack_end_seq = tp->lost_retrans_low;
u32 highest_sack_end_seq;
int flag = 0;
int found_dup_sack = 0;
int cached_fack_count;
@ -1256,7 +1256,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
if (!tp->sacked_out) {
if (WARN_ON(tp->fackets_out))
tp->fackets_out = 0;
tp->highest_sack = tp->snd_una;
tp->highest_sack = tcp_write_queue_head(sk);
}
prior_fackets = tp->fackets_out;
@ -1483,10 +1483,9 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
if (fack_count > tp->fackets_out)
tp->fackets_out = fack_count;
if (after(TCP_SKB_CB(skb)->seq, tp->highest_sack)) {
tp->highest_sack = TCP_SKB_CB(skb)->seq;
highest_sack_end_seq = TCP_SKB_CB(skb)->end_seq;
}
if (after(TCP_SKB_CB(skb)->seq, tcp_highest_sack_seq(tp)))
tp->highest_sack = skb;
} else {
if (dup_sack && (sacked&TCPCB_RETRANS))
reord = min(fack_count, reord);
@ -1514,6 +1513,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
flag &= ~FLAG_ONLY_ORIG_SACKED;
}
highest_sack_end_seq = TCP_SKB_CB(tp->highest_sack)->end_seq;
if (tcp_is_fack(tp) && tp->retrans_out &&
after(highest_sack_end_seq, tp->lost_retrans_low) &&
icsk->icsk_ca_state == TCP_CA_Recovery)