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[TCP]: Tighten tcp_sock's belt, drop left_out

Browse source 
It is easily calculable when needed and user are not that many
after all.

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 2007-08-09 14:33:18 +03:00 • committed by David S. Miller
commit b5860bbac7
5 changed files with 7 additions and 22 deletions
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1
include/linux/tcp.h
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@ -304,7 +304,6 @@ struct tcp_sock {
u32 rtt_seq; /* sequence number to update rttvar */
u32 packets_out; /* Packets which are "in flight" */
u32 left_out; /* Packets which leaved network */
u32 retrans_out; /* Retransmitted packets out */
/*
* Options received (usually on last packet, some only on SYN packets).

4
include/net/tcp.h
View file

@ -735,7 +735,8 @@ static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
*/
static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
{
return (tp->packets_out - tp->left_out + tp->retrans_out);
return tp->packets_out - (tp->sacked_out + tp->lost_out) +
tp->retrans_out;
}
/* If cwnd > ssthresh, we may raise ssthresh to be half-way to cwnd.
@ -757,7 +758,6 @@ static inline void tcp_sync_left_out(struct tcp_sock *tp)
{
BUG_ON(tp->rx_opt.sack_ok &&
(tp->sacked_out + tp->lost_out > tp->packets_out));
tp->left_out = tp->sacked_out + tp->lost_out;
}
extern void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);