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After dynamically reducing rtq_reallyold, have in_rtqkill() reduce the

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expiration timer of anything which would expire later than that.  (There
should be a way to call this from ip_sysctl() as well, but there currently
isn't.)
This commit is contained in:
Garrett Wollman 1995-02-14 23:11:26 +00:00
parent ea80aed1a9
commit 628e3e3401
1 changed files with 14 additions and 4 deletions
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18
sys/netinet/in_rmx.c
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@ -101,6 +101,7 @@ in_matroute(void *v_arg, struct radix_node_head *head)
return rn;
}
/* MIB variables: net.inet.ip.{rtexpire,rtmaxcache,rtminexpire}. */
int rtq_reallyold = 60*60; /* one hour is ``really old'' */
int rtq_toomany = 128; /* 128 cached routes is ``too many'' */
int rtq_minreallyold = 10; /* never automatically crank down to less */
@ -145,12 +146,14 @@ struct rtqk_arg {
int draining;
int killed;
int found;
int updating;
time_t nextstop;
};
/*
* Get rid of old routes. When draining, this deletes everything, even when
* the timeout is not expired yet.
* the timeout is not expired yet. When updating, this makes sure that
* nothing has a timeout longer than the current value of rtq_reallyold.
*/
static int
in_rtqkill(struct radix_node *rn, void *rock)
@ -163,8 +166,7 @@ in_rtqkill(struct radix_node *rn, void *rock)
if(rt->rt_flags & RTPRF_OURS) {
ap->found++;
if(ap->draining || rt->rt_rmx.rmx_expire <= time.tv_sec
|| (rt->rt_rmx.rmx_expire - time.tv_sec > rtq_reallyold)) {
if(ap->draining || rt->rt_rmx.rmx_expire <= time.tv_sec) {
if(rt->rt_refcnt > 0)
panic("rtqkill route really not free\n");
@ -178,6 +180,12 @@ in_rtqkill(struct radix_node *rn, void *rock)
ap->killed++;
}
} else {
if(ap->updating
&& (time.tv_sec - rt->rt_rmx.rmx_expire
> rtq_reallyold)) {
rt->rt_rmx.rmx_expire = time.tv_sec
+ rtq_reallyold;
}
ap->nextstop = lmin(ap->nextstop,
rt->rt_rmx.rmx_expire);
}
@ -201,7 +209,7 @@ in_rtqtimo(void *rock)
arg.found = arg.killed = 0;
arg.rnh = rnh;
arg.nextstop = time.tv_sec + rtq_timeout;
arg.draining = 0;
arg.draining = arg.updating = 0;
s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
splx(s);
@ -226,6 +234,7 @@ in_rtqtimo(void *rock)
log(LOG_DEBUG, "in_rtqtimo: adjusted rtq_reallyold to %d",
rtq_reallyold);
arg.found = arg.killed = 0;
arg.updating = 1;
s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
splx(s);
@ -246,6 +255,7 @@ in_rtqdrain(void)
arg.rnh = rnh;
arg.nextstop = 0;
arg.draining = 1;
arg.updating = 0;
s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
splx(s);