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Create the fetch context timer on the matching thread

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In the dns_resolver API, delay creating the fetch context timer, so it
is created on the thread/loop associated to the fetch context.
This commit is contained in:
Ondřej Surý 2022-09-12 13:22:38 +02:00 committed by Evan Hunt
parent 76be9a329a
commit f16c46173c
1 changed files with 12 additions and 9 deletions
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21
lib/dns/resolver.c
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@ -1269,6 +1269,9 @@ update_edns_stats(resquery_t *query) {
}
}
static void
fctx_expired(void *arg);
/*
* Start the maximum lifetime timer for the fetch. This will
* trigger if, for example, some ADB or validator dependency
@ -1290,6 +1293,9 @@ fctx_starttimer(fetchctx_t *fctx) {
isc_time_subtract(&expires, &now, &interval);
}
if (fctx->timer == NULL) {
isc_timer_create(fctx->loop, fctx_expired, fctx, &fctx->timer);
}
isc_timer_start(fctx->timer, isc_timertype_once, &interval);
}
@ -1301,6 +1307,10 @@ fctx_stoptimer(fetchctx_t *fctx) {
* should never fail anyway, since the code as currently written
* cannot fail in that case.
*/
if (fctx->timer == NULL) {
return;
}
isc_timer_stop(fctx->timer);
}
@ -4436,8 +4446,6 @@ fctx_destroy(fetchctx_t *fctx) {
dns_db_detach(&fctx->cache);
dns_adb_detach(&fctx->adb);
isc_timer_destroy(&fctx->timer);
dns_resolver_detach(&fctx->res);
isc_mem_free(fctx->mctx, fctx->info);
@ -4518,6 +4526,8 @@ fctx_doshutdown(isc_task_t *task, isc_event_t *event) {
fctx_cancelqueries(fctx, false, false);
fctx_cleanup(fctx);
isc_timer_destroy(&fctx->timer);
LOCK(&fctx->bucket->lock);
FCTX_ATTR_SET(fctx, FCTX_ATTR_SHUTTINGDOWN);
@ -4564,13 +4574,6 @@ fctx_start(isc_task_t *task, isc_event_t *event) {
LOCK(&fctx->bucket->lock);
/*
* Create an inactive timer to enforce maximum query
* lifetime. It will be made active when the fetch is
* started.
*/
isc_timer_create(fctx->loop, fctx_expired, fctx, &fctx->timer);
INSIST(fctx->state == fetchstate_init);
if (atomic_load_acquire(&fctx->want_shutdown)) {
/*