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Exempt prefetches from the fetches-per-server quota

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Give prefetches a free pass through the quota so that the cache
entries for popular zones could be updated successfully even if the
quota for is already reached.
This commit is contained in:
Aram Sargsyan 2024-06-07 16:24:00 +00:00 committed by Arаm Sаrgsyаn
parent cada2de31f
commit c7e8b7cf63
3 changed files with 17 additions and 2 deletions
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8
lib/dns/adb.c
View file

@ -1478,7 +1478,9 @@ copy_namehook_lists(dns_adb_t *adb, dns_adbfind_t *find, dns_adbname_t *name) {
dns_adbaddrinfo_t *addrinfo = NULL;
entry = namehook->entry;
if (adbentry_overquota(entry)) {
if ((find->options & DNS_ADBFIND_QUOTAEXEMPT) == 0 &&
adbentry_overquota(entry))
{
find->options |= DNS_ADBFIND_OVERQUOTA;
goto nextv4;
}
@ -1500,7 +1502,9 @@ copy_namehook_lists(dns_adb_t *adb, dns_adbfind_t *find, dns_adbname_t *name) {
dns_adbaddrinfo_t *addrinfo = NULL;
entry = namehook->entry;
if (adbentry_overquota(entry)) {
if ((find->options & DNS_ADBFIND_QUOTAEXEMPT) == 0 &&
adbentry_overquota(entry))
{
find->options |= DNS_ADBFIND_OVERQUOTA;
goto nextv6;
}

4
lib/dns/include/dns/adb.h
View file

@ -179,6 +179,10 @@ struct dns_adbfind {
* This is useful for reestablishing glue that has expired.
*/
#define DNS_ADBFIND_STARTATZONE 0x00000020
/*%
* Fetches will be exempted from the quota.
*/
#define DNS_ADBFIND_QUOTAEXEMPT 0x00000040
/*%
* The server's fetch quota is exceeded; it will be treated as
* lame for this query.

7
lib/dns/resolver.c
View file

@ -3257,6 +3257,13 @@ findname(fetchctx_t *fctx, const dns_name_t *name, in_port_t port,
options |= DNS_ADBFIND_STARTATZONE;
}
/*
* Exempt prefetches from ADB quota.
*/
if ((fctx->options & DNS_FETCHOPT_PREFETCH) != 0) {
options |= DNS_ADBFIND_QUOTAEXEMPT;
}
/*
* See what we know about this address.
*/