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[9.20] chg: dev: Shutdown the fetch context after canceling the last fetch

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Shutdown the fetch context immediately after the last fetch has been canceled from
that particular fetch context.

Backport of MR !9958

Merge branch 'backport-ondrej/shutdown-the-fetch-context-early-9.20' into 'bind-9.20'

See merge request isc-projects/bind9!9977
This commit is contained in:
Ondřej Surý 2025-01-22 14:05:12 +00:00
commit 55b7cc9596
1 changed files with 9 additions and 4 deletions
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13
lib/dns/resolver.c
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@ -10604,6 +10604,7 @@ fail:
void
dns_resolver_cancelfetch(dns_fetch_t *fetch) {
fetchctx_t *fctx = NULL;
bool last_fetch = false;
REQUIRE(DNS_FETCH_VALID(fetch));
fctx = fetch->private;
@ -10634,11 +10635,15 @@ dns_resolver_cancelfetch(dns_fetch_t *fetch) {
}
}
/*
* The fctx continues running even if no fetches remain;
* the answer is still cached.
*/
if (ISC_LIST_EMPTY(fctx->resps)) {
last_fetch = true;
}
UNLOCK(&fctx->lock);
if (last_fetch) {
fetchctx_ref(fctx);
isc_async_run(fctx->loop, fctx_shutdown, fctx);
}
}
void