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initialize header in dns_rdataslab_fromrdataset()

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when dns_rdataslab_fromrdataset() is run, in addition to
allocating space for a slab header, it also partially
initializes it, setting the type match rdataset->type and
rdataset->covers, the trust to rdataset->trust, and the TTL to
rdataset->ttl.
This commit is contained in:
Evan Hunt
2025-02-07 21:06:34 -08:00
parent b4bde9bef4
commit 82edec67a5
4 changed files with 37 additions and 34 deletions
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16
lib/dns/qpcache.c
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@@ -3201,18 +3201,20 @@ qpcache_addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
dns_rdataset_getownercase(rdataset, name);
newheader = (dns_slabheader_t *)region.base;
*newheader = (dns_slabheader_t){
.type = DNS_TYPEPAIR_VALUE(rdataset->type, rdataset->covers),
.trust = rdataset->trust,
.last_used = now,
.node = (dns_dbnode_t *)qpnode,
};
dns_slabheader_reset(newheader, db, node);
newheader->last_used = now;
/*
* By default, dns_rdataslab_fromrdataset() sets newheader->ttl
* to the rdataset TTL. In the case of the cache, that's wrong;
* we need it to be set to the expire time instead.
*/
setttl(newheader, rdataset->ttl + now);
if (rdataset->ttl == 0U) {
DNS_SLABHEADER_SETATTR(newheader, DNS_SLABHEADERATTR_ZEROTTL);
}
atomic_init(&newheader->count,
atomic_fetch_add_relaxed(&init_count, 1));
if ((rdataset->attributes & DNS_RDATASETATTR_PREFETCH) != 0) {