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tcp: fix ssthresh u16 leftover

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It was once upon time so that snd_sthresh was a 16-bit quantity.
...That has not been true for long period of time. I run across
some ancient compares which still seem to trust such legacy.
Put all that magic into a single place, I hopefully found all
of them.

Compile tested, though linking of allyesconfig is ridiculous
nowadays it seems.

Signed-off-by: Ilpo Järvinen <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Ilpo Järvinen 2009-09-15 01:30:10 -07:00 • committed by David S. Miller
commit 0b6a05c1db
6 changed files with 15 additions and 7 deletions
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2
net/ipv4/tcp.c
View file

@ -2012,7 +2012,7 @@ int tcp_disconnect(struct sock *sk, int flags)
tp->snd_cwnd = 2;
icsk->icsk_probes_out = 0;
tp->packets_out = 0;
tp->snd_ssthresh = 0x7fffffff;
tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
tp->snd_cwnd_cnt = 0;
tp->bytes_acked = 0;
tcp_set_ca_state(sk, TCP_CA_Open);

2
net/ipv4/tcp_input.c
View file

@ -761,7 +761,7 @@ void tcp_update_metrics(struct sock *sk)
set_dst_metric_rtt(dst, RTAX_RTTVAR, var);
}
if (tp->snd_ssthresh >= 0xFFFF) {
if (tcp_in_initial_slowstart(tp)) {
/* Slow start still did not finish. */
if (dst_metric(dst, RTAX_SSTHRESH) &&
!dst_metric_locked(dst, RTAX_SSTHRESH) &&

4
net/ipv4/tcp_ipv4.c
View file

@ -1808,7 +1808,7 @@ static int tcp_v4_init_sock(struct sock *sk)
/* See draft-stevens-tcpca-spec-01 for discussion of the
* initialization of these values.
*/
tp->snd_ssthresh = 0x7fffffff; /* Infinity */
tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
tp->snd_cwnd_clamp = ~0;
tp->mss_cache = 536;
@ -2284,7 +2284,7 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len)
jiffies_to_clock_t(icsk->icsk_ack.ato),
(icsk->icsk_ack.quick << 1) | icsk->icsk_ack.pingpong,
tp->snd_cwnd,
tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh,
tcp_in_initial_slowstart(tp) ? -1 : tp->snd_ssthresh,
len);
}

2
net/ipv4/tcp_minisocks.c
View file

@ -410,7 +410,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newtp->retrans_out = 0;
newtp->sacked_out = 0;
newtp->fackets_out = 0;
newtp->snd_ssthresh = 0x7fffffff;
newtp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
/* So many TCP implementations out there (incorrectly) count the
* initial SYN frame in their delayed-ACK and congestion control