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Record how often DNS_R_COVERINGNSEC is returned from the cache

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reported as "covering nsec returned" when dumping cache stats
and as "CoveringNSEC" in json and xml cache statistics.
This commit is contained in:
Mark Andrews 2021-10-27 13:25:41 +11:00 committed by Petr Špaček
parent 90dbdb2cb5
commit 43316a40a0
No known key found for this signature in database
GPG key ID: ABD587CDF06581AE
3 changed files with 15 additions and 2 deletions
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9
lib/dns/cache.c
View file

@ -1260,6 +1260,9 @@ dns_cache_dumpstats(dns_cache_t *cache, FILE *fp) {
fprintf(fp, "%20" PRIu64 " %s\n",
values[dns_cachestatscounter_deletettl],
"cache records deleted due to TTL expiration");
fprintf(fp, "%20" PRIu64 " %s\n",
values[dns_cachestatscounter_coveringnsec],
"covering nsec returned");
fprintf(fp, "%20u %s\n", dns_db_nodecount(cache->db, dns_dbtree_main),
"cache database nodes");
fprintf(fp, "%20u %s\n", dns_db_nodecount(cache->db, dns_dbtree_nsec),
@ -1328,6 +1331,8 @@ dns_cache_renderxml(dns_cache_t *cache, void *writer0) {
writer));
TRY0(renderstat("DeleteTTL", values[dns_cachestatscounter_deletettl],
writer));
TRY0(renderstat("CoveringNSEC",
values[dns_cachestatscounter_coveringnsec], writer));
TRY0(renderstat("CacheNodes",
dns_db_nodecount(cache->db, dns_dbtree_main), writer));
@ -1393,6 +1398,10 @@ dns_cache_renderjson(dns_cache_t *cache, void *cstats0) {
CHECKMEM(obj);
json_object_object_add(cstats, "DeleteTTL", obj);
obj = json_object_new_int64(values[dns_cachestatscounter_coveringnsec]);
CHECKMEM(obj);
json_object_object_add(cstats, "CoveringNSEC", obj);
obj = json_object_new_int64(
dns_db_nodecount(cache->db, dns_dbtree_main));
CHECKMEM(obj);

3
lib/dns/include/dns/stats.h
View file

@ -119,8 +119,9 @@ enum {
dns_cachestatscounter_querymisses = 4,
dns_cachestatscounter_deletelru = 5,
dns_cachestatscounter_deletettl = 6,
dns_cachestatscounter_coveringnsec = 7,
dns_cachestatscounter_max = 7,
dns_cachestatscounter_max = 8,
/*%
* Query statistics counters (obsolete).

5
lib/dns/rbtdb.c
View file

@ -786,13 +786,16 @@ update_cachestats(dns_rbtdb_t *rbtdb, isc_result_t result) {
}
switch (result) {
case DNS_R_COVERINGNSEC:
isc_stats_increment(rbtdb->cachestats,
dns_cachestatscounter_coveringnsec);
/* FALLTHROUGH */
case ISC_R_SUCCESS:
case DNS_R_CNAME:
case DNS_R_DNAME:
case DNS_R_DELEGATION:
case DNS_R_NCACHENXDOMAIN:
case DNS_R_NCACHENXRRSET:
case DNS_R_COVERINGNSEC:
isc_stats_increment(rbtdb->cachestats,
dns_cachestatscounter_hits);
break;