Revert "lib/layer: answer both m12n/full names from cache"

This reverts commit 3d1ee641.

lib/layer/iterate.c

@@ -50,7 +50,7 @@ static const knot_dname_t *minimized_qname(struct kr_query *query, uint16_t *qty
 {
 	/* Minimization disabled. */
 	const knot_dname_t *qname = query->sname;
-	if (query->flags & (QUERY_NO_MINIMIZE|QUERY_CACHED)) {
+	if (query->flags & QUERY_NO_MINIMIZE) {
 		return qname;
 	}
 

lib/layer/pktcache.c

@@ -54,9 +54,10 @@ static void adjust_ttl(knot_rrset_t *rr, uint32_t drift)
 	}
 }
 
-static int loot_cache_set(namedb_txn_t *txn, knot_pkt_t *pkt, uint8_t tag, const knot_dname_t *qname,
-                          uint16_t rrtype, uint32_t timestamp)
+static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, uint8_t tag, uint32_t timestamp)
 {
+	const knot_dname_t *qname = knot_pkt_qname(pkt);
+	uint16_t rrtype = knot_pkt_qtype(pkt);
 	struct kr_cache_entry *entry;
 	entry = kr_cache_peek(txn, tag, qname, rrtype, &timestamp);
 	if (!entry) { /* Not in the cache */
@@ -90,24 +91,6 @@ static int loot_cache_set(namedb_txn_t *txn, knot_pkt_t *pkt, uint8_t tag, const
 	return ret;
 }
 
-static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, struct kr_query *qry, uint8_t tag)
-{
-	uint32_t timestamp = qry->timestamp.tv_sec;
-	/* Try direct match first */
-	const knot_dname_t *qname = qry->sname;
-	uint16_t rrtype = qry->stype;
-	int ret = loot_cache_set(txn, pkt, tag, qname, rrtype, timestamp);
-	if (ret == kr_error(ENOENT)) {
-		/* Try minimized name second */
-		qname = knot_pkt_qname(pkt);
-		rrtype = knot_pkt_qtype(pkt);
-		if (!knot_dname_is_equal(qname, qry->sname)) {
-			ret = loot_cache_set(txn, pkt, tag, qname, rrtype, timestamp);
-		}
-	}
-	return ret;
-}
-
 static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
 {
 	struct kr_request *req = ctx->data;
@@ -126,7 +109,8 @@ static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
 	if (kr_cache_txn_begin(cache, &txn, NAMEDB_RDONLY) != 0) {
 		return ctx->state;
 	}
-	if (loot_cache(&txn, pkt, qry, get_tag(req->answer)) != 0) {
+	uint32_t timestamp = qry->timestamp.tv_sec;
+	if (loot_cache(&txn, pkt, get_tag(req->answer), timestamp) != 0) {
 		kr_cache_txn_abort(&txn);
 		return ctx->state;
 	}

lib/layer/rrcache.c

@@ -53,9 +53,11 @@ static int loot_rr(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t *name,
 	return kr_ok();
 }
 
-static int loot_cache_set(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t *qname,
-                          uint16_t rrclass, uint16_t rrtype, uint32_t timestamp)
+static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, uint32_t timestamp)
 {
+	const knot_dname_t *qname = knot_pkt_qname(pkt);
+	uint16_t rrclass = knot_pkt_qclass(pkt);
+	uint16_t rrtype = knot_pkt_qtype(pkt);
 	int ret = loot_rr(txn, pkt, qname, rrtype, rrclass, timestamp);
 	if (ret == kr_error(ENOENT) && rrtype != KNOT_RRTYPE_CNAME) { /* Chase CNAME if no direct hit */
 		ret = loot_rr(txn, pkt, qname, KNOT_RRTYPE_CNAME, rrclass, timestamp);
@@ -63,25 +65,6 @@ static int loot_cache_set(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t
 	return ret;
 }
 
-static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, struct kr_query *qry)
-{
-	uint32_t timestamp = qry->timestamp.tv_sec;
-	/* Try direct match first */
-	const knot_dname_t *qname = qry->sname;
-	uint16_t rrclass = qry->sclass;
-	uint16_t rrtype = qry->stype;
-	int ret = loot_cache_set(txn, pkt, qname, rrclass, rrtype, timestamp);
-	if (ret == kr_error(ENOENT)) {
-		/* Try minimized name second */
-		qname = knot_pkt_qname(pkt);
-		rrtype = knot_pkt_qtype(pkt);
-		if (!knot_dname_is_equal(qname, qry->sname)) {
-			ret = loot_cache_set(txn, pkt, qname, rrclass, rrtype, timestamp);
-		}
-	}
-	return ret;
-}
-
 static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
 {
 	struct kr_request *req = ctx->data;
@@ -101,7 +84,8 @@ static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
 	 * it may either be a CNAME chain or direct answer.
 	 * Only one step of the chain is resolved at a time.
 	 */
-	int ret = loot_cache(&txn, pkt, qry);
+	uint32_t timestamp = qry->timestamp.tv_sec;
+	int ret = loot_cache(&txn, pkt, timestamp);
 	kr_cache_txn_abort(&txn);
 	if (ret == 0) {
 		DEBUG_MSG("=> satisfied from cache\n");