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Export tcp_always_keepalive for use by the Chelsio TOM module.

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This used to work by accident with ld.bfd even though always_keepalive
was marked as static. LLD honors static more correctly, so export this
variable properly (including moving it into the tcp_* namespace).

Reviewed by:	bz, emaste
MFC after:	2 weeks
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D14129
This commit is contained in:
John Baldwin 2018-01-30 23:01:37 +00:00
parent af63bbd0f0
commit f17985319d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=328608
3 changed files with 7 additions and 6 deletions
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5
sys/dev/cxgbe/tom/t4_tom.c
View File

@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$");
#include <netinet6/scope6_var.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/toecore.h>
@ -545,8 +546,6 @@ select_rcv_wscale(void)
return (wscale);
}
extern int always_keepalive;
/*
* socket so could be a listening socket too.
*/
@ -565,7 +564,7 @@ calc_opt0(struct socket *so, struct vi_info *vi, struct l2t_entry *e,
if (so != NULL) {
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
int keepalive = always_keepalive ||
int keepalive = tcp_always_keepalive ||
so_options_get(so) & SO_KEEPALIVE;
opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0);

7
sys/netinet/tcp_timer.c
View File

@ -118,9 +118,9 @@ SYSCTL_PROC(_net_inet_tcp, OID_AUTO, rexmit_slop, CTLTYPE_INT|CTLFLAG_RW,
&tcp_rexmit_slop, 0, sysctl_msec_to_ticks, "I",
"Retransmission Timer Slop");
static int always_keepalive = 1;
int tcp_always_keepalive = 1;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, always_keepalive, CTLFLAG_RW,
&always_keepalive , 0, "Assume SO_KEEPALIVE on all TCP connections");
&tcp_always_keepalive , 0, "Assume SO_KEEPALIVE on all TCP connections");
int tcp_fast_finwait2_recycle = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, fast_finwait2_recycle, CTLFLAG_RW,
@ -471,7 +471,8 @@ tcp_timer_keep(void *xtp)
TCPSTAT_INC(tcps_keeptimeo);
if (tp->t_state < TCPS_ESTABLISHED)
goto dropit;
if ((always_keepalive || inp->inp_socket->so_options & SO_KEEPALIVE) &&
if ((tcp_always_keepalive ||
inp->inp_socket->so_options & SO_KEEPALIVE) &&
tp->t_state <= TCPS_CLOSING) {
if (ticks - tp->t_rcvtime >= TP_KEEPIDLE(tp) + TP_MAXIDLE(tp))
goto dropit;

1
sys/netinet/tcp_timer.h
View File

@ -197,6 +197,7 @@ extern int tcp_ttl; /* time to live for TCP segs */
extern int tcp_backoff[];
extern int tcp_syn_backoff[];
extern int tcp_always_keepalive;
extern int tcp_finwait2_timeout;
extern int tcp_fast_finwait2_recycle;