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Replace rbt_addnode with qp_insert

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Replace dns_rbt_addnode calls with dns_qp_insert. With QP, it sometimes
makes more sense to first lookup the name and see if there is an
existing node (rather than create new data, insert, find out a node
already exists, and destroy the data again). This is done with
dns_qp_getname(), which is more lightweight than dns_qp_lookup(),
and we are only interested in if there is already a leaf node for this
name or not.
This commit is contained in:
Matthijs Mekking 2024-01-10 16:29:57 +01:00
parent bb4464181a
commit c53b95e134
2 changed files with 79 additions and 86 deletions
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93
lib/dns/qp-zonedb.c
View File

@ -1608,14 +1608,17 @@ delegating_type(dns_qpdb_t *qpdb, dns_rbtnode_t *node, dns_typepair_t type) {
static isc_result_t
loadnode(dns_qpdb_t *qpdb, const dns_name_t *name, dns_rbtnode_t **nodep,
bool hasnsec) {
isc_result_t noderesult, nsecresult, tmpresult;
isc_result_t noderesult, nsecresult;
dns_rbtnode_t *nsecnode = NULL, *node = NULL;
noderesult = dns_rbt_addnode(qpdb->tree, name, &node);
if (!hasnsec) {
goto done;
}
if (noderesult == ISC_R_EXISTS) {
noderesult = dns_qp_getname(qpdb->tree, name, (void **)&node, NULL);
if (noderesult != ISC_R_SUCCESS) {
INSIST(node == NULL);
node = dns_qpdata_create(qpdb, name);
noderesult = dns_qp_insert(qpdb->tree, node, 0);
INSIST(noderesult == ISC_R_SUCCESS);
dns_qpdata_unref(node);
} else if (noderesult == ISC_R_SUCCESS) {
/*
* Add a node to the auxiliary NSEC tree for an old node
* just now getting an NSEC record.
@ -1623,7 +1626,11 @@ loadnode(dns_qpdb_t *qpdb, const dns_name_t *name, dns_rbtnode_t **nodep,
if (node->nsec == DNS_DB_NSEC_HAS_NSEC) {
goto done;
}
} else if (noderesult != ISC_R_SUCCESS) {
} else {
goto done;
}
if (!hasnsec) {
goto done;
}
@ -1635,14 +1642,8 @@ loadnode(dns_qpdb_t *qpdb, const dns_name_t *name, dns_rbtnode_t **nodep,
* Add nodes to the auxiliary tree after corresponding nodes have
* been added to the main tree.
*/
nsecresult = dns_rbt_addnode(qpdb->nsec, name, &nsecnode);
nsecresult = dns_qp_getname(qpdb->nsec, name, (void **)&nsecnode, NULL);
if (nsecresult == ISC_R_SUCCESS) {
nsecnode->nsec = DNS_DB_NSEC_NSEC;
node->nsec = DNS_DB_NSEC_HAS_NSEC;
goto done;
}
if (nsecresult == ISC_R_EXISTS) {
#if 1 /* 0 */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_CACHE, ISC_LOG_WARNING,
@ -1650,28 +1651,14 @@ loadnode(dns_qpdb_t *qpdb, const dns_name_t *name, dns_rbtnode_t **nodep,
#endif /* if 1 */
node->nsec = DNS_DB_NSEC_HAS_NSEC;
goto done;
} else {
INSIST(nsecnode == NULL);
nsecnode = dns_qpdata_create(qpdb, name);
nsecresult = dns_qp_insert(qpdb->nsec, nsecnode, 0);
INSIST(nsecresult == ISC_R_SUCCESS);
}
if (noderesult == ISC_R_SUCCESS) {
/*
* Remove the node we just added above.
*/
tmpresult = dns_rbt_deletenode(qpdb->tree, node, false);
if (tmpresult != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_CACHE, ISC_LOG_WARNING,
"loading_addrdataset: "
"dns_rbt_deletenode: %s after "
"dns_rbt_addnode(NSEC): %s",
isc_result_totext(tmpresult),
isc_result_totext(noderesult));
}
}
/*
* Set the error condition to be returned.
*/
noderesult = nsecresult;
nsecnode->nsec = DNS_DB_NSEC_NSEC;
node->nsec = DNS_DB_NSEC_HAS_NSEC;
done:
if (noderesult == ISC_R_SUCCESS || noderesult == ISC_R_EXISTS) {
@ -1731,10 +1718,15 @@ loading_addrdataset(void *arg, const dns_name_t *name,
if (rdataset->type == dns_rdatatype_nsec3 ||
rdataset->covers == dns_rdatatype_nsec3)
{
result = dns_rbt_addnode(qpdb->nsec3, name, &node);
if (result == ISC_R_SUCCESS) {
node->nsec = DNS_DB_NSEC_NSEC3;
result = dns_qp_getname(qpdb->nsec3, name, (void **)&node,
NULL);
if (result != ISC_R_SUCCESS) {
INSIST(node == NULL);
node = dns_qpdata_create(qpdb, name);
result = dns_qp_insert(qpdb->nsec3, node, 0);
INSIST(result == ISC_R_SUCCESS);
}
node->nsec = DNS_DB_NSEC_NSEC3;
} else if (rdataset->type == dns_rdatatype_nsec) {
result = loadnode(qpdb, name, &node, true);
} else {
@ -2462,13 +2454,17 @@ dns__qpzone_wildcardmagic(dns_qpdb_t *qpdb, const dns_name_t *name, bool lock) {
INSIST(n >= 2);
n--;
dns_name_getlabelsequence(name, 1, n, &foundname);
result = dns_rbt_addnode(qpdb->tree, &foundname, &node);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
return (result);
result = dns_qp_getname(qpdb->tree, &foundname, (void **)&node, NULL);
if (result != ISC_R_SUCCESS) {
INSIST(node == NULL);
node = dns_qpdata_create(qpdb, &foundname);
result = dns_qp_insert(qpdb->tree, node, 0);
INSIST(result == ISC_R_SUCCESS);
}
if (result == ISC_R_SUCCESS) {
INSIST(result == ISC_R_SUCCESS);
node->nsec = DNS_DB_NSEC_NORMAL;
}
node->find_callback = 1;
if (lock) {
NODE_WRLOCK(&qpdb->node_locks[node->locknum].lock, &nlocktype);
@ -2500,9 +2496,14 @@ dns__qpzone_addwildcards(dns_qpdb_t *qpdb, const dns_name_t *name, bool lock) {
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_rbt_addnode(qpdb->tree, &foundname, &node);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
return (result);
result = dns_qp_getname(qpdb->tree, name,
(void **)&node, NULL);
if (result != ISC_R_SUCCESS) {
INSIST(node == NULL);
node = dns_qpdata_create(qpdb, name);
result = dns_qp_insert(qpdb->tree, node, 0);
INSIST(result == ISC_R_SUCCESS);
}
if (result == ISC_R_SUCCESS) {
node->nsec = DNS_DB_NSEC_NORMAL;

54
lib/dns/qpdb.c
View File

@ -2013,17 +2013,16 @@ dns__qpdb_findnodeintree(dns_qpdb_t *qpdb, dns_qp_t *tree,
* Try to upgrade the lock and if that fails unlock then relock.
*/
TREE_FORCEUPGRADE(&qpdb->tree_lock, &tlocktype);
node = NULL;
result = dns_rbt_addnode(tree, name, &node);
if (result == ISC_R_SUCCESS) {
dns_rbt_namefromnode(node, &nodename);
node->locknum = node->hashval % qpdb->node_lock_count;
node = dns_qpdata_create(qpdb, name);
result = dns_qp_insert(tree, node, 0);
INSIST(result == ISC_R_SUCCESS);
if (tree == qpdb->tree) {
dns__qpzone_addwildcards(qpdb, name, true);
if (dns_name_iswildcard(name)) {
result = dns__qpzone_wildcardmagic(
qpdb, name, true);
result = dns__qpzone_wildcardmagic(qpdb, name,
true);
if (result != ISC_R_SUCCESS) {
goto unlock;
}
@ -2032,11 +2031,6 @@ dns__qpdb_findnodeintree(dns_qpdb_t *qpdb, dns_qp_t *tree,
if (tree == qpdb->nsec3) {
node->nsec = DNS_DB_NSEC_NSEC3;
}
} else if (result == ISC_R_EXISTS) {
result = ISC_R_SUCCESS;
} else {
goto unlock;
}
}
if (tree == qpdb->nsec3) {
@ -3337,14 +3331,18 @@ dns__qpdb_addrdataset(dns_db_t *db, dns_dbnode_t *node,
if (newnsec) {
dns_rbtnode_t *nsecnode = NULL;
result = dns_rbt_addnode(qpdb->nsec, name, &nsecnode);
result = dns_qp_getname(qpdb->nsec, name, (void **)&nsecnode,
NULL);
if (result == ISC_R_SUCCESS) {
nsecnode->nsec = DNS_DB_NSEC_NSEC;
rbtnode->nsec = DNS_DB_NSEC_HAS_NSEC;
} else if (result == ISC_R_EXISTS) {
rbtnode->nsec = DNS_DB_NSEC_HAS_NSEC;
result = ISC_R_SUCCESS;
} else {
INSIST(nsecnode == NULL);
nsecnode = dns_qpdata_create(qpdb, name);
nsecnode->nsec = DNS_DB_NSEC_NSEC;
result = dns_qp_insert(qpdb->nsec, nsecnode, 0);
INSIST(result == ISC_R_SUCCESS);
}
rbtnode->nsec = DNS_DB_NSEC_HAS_NSEC;
}
if (result == ISC_R_SUCCESS) {
@ -3889,27 +3887,21 @@ dns__qpdb_create(isc_mem_t *mctx, const dns_name_t *origin, dns_dbtype_t type,
* change.
*/
if (!IS_CACHE(qpdb)) {
result = dns_rbt_addnode(qpdb->tree, &qpdb->common.origin,
&qpdb->origin_node);
if (result != ISC_R_SUCCESS) {
INSIST(result != ISC_R_EXISTS);
free_qpdb(qpdb, false);
return (result);
}
qpdb->origin_node = dns_qpdata_create(qpdb,
&qpdb->common.origin);
result = dns_qp_insert(qpdb->tree, qpdb->origin_node, 0);
INSIST(result == ISC_R_SUCCESS);
INSIST(qpdb->origin_node != NULL);
qpdb->origin_node->nsec = DNS_DB_NSEC_NORMAL;
/*
* Add an apex node to the NSEC3 tree so that NSEC3 searches
* return partial matches when there is only a single NSEC3
* record in the tree.
*/
result = dns_rbt_addnode(qpdb->nsec3, &qpdb->common.origin,
&qpdb->nsec3_origin_node);
if (result != ISC_R_SUCCESS) {
INSIST(result != ISC_R_EXISTS);
free_qpdb(qpdb, false);
return (result);
}
qpdb->nsec3_origin_node =
dns_qpdata_create(qpdb, &qpdb->common.origin);
result = dns_qp_insert(qpdb->nsec3, qpdb->nsec3_origin_node, 0);
INSIST(result == ISC_R_SUCCESS);
INSIST(qpdb->nsec3_origin_node != NULL);
qpdb->nsec3_origin_node->nsec = DNS_DB_NSEC_NSEC3;