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https://github.com/isc-projects/bind9.git
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086b63f56d
Replace the ISC_LIST based deadnodes implementation with isc_queue which is wait-free and we don't have to acquire neither the tree nor node lock to append nodes to the queue and the cleaning process can also copy (splice) the list into a local copy without acquiring the list. Currently, there's little benefit to this as we need to hold those locks anyway, but in the future as we move to RCU based implementation, this will be ready. To align the cleaning with our event loop based model, remove the hardcoded count for the node locks and use the number of the event loops instead. This way, each event loop can have its own cleaning as part of the process. Use uniform random numbers to spread the nodes evenly between the buckets (instead of hashing the domain name).
368 lines
10 KiB
C
368 lines
10 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <inttypes.h>
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#include <sched.h> /* IWYU pragma: keep */
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#include <setjmp.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define UNIT_TESTING
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#include <cmocka.h>
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#include <dns/db.h>
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#include <dns/dbiterator.h>
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#include <dns/journal.h>
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#include <dns/name.h>
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#include <dns/rdatalist.h>
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#include <tests/dns.h>
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#define BUFLEN 255
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#define BIGBUFLEN (64 * 1024)
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#define TEST_ORIGIN "test"
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/*
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* Individual unit tests
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*/
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/* test multiple calls to dns_db_getoriginnode */
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ISC_LOOP_TEST_IMPL(getoriginnode) {
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dns_db_t *db = NULL;
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dns_dbnode_t *node = NULL;
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isc_result_t result;
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result = dns_db_create(mctx, ZONEDB_DEFAULT, dns_rootname,
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dns_dbtype_zone, dns_rdataclass_in, 0, NULL,
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&db);
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_getoriginnode(db, &node);
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assert_int_equal(result, ISC_R_SUCCESS);
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dns_db_detachnode(db, &node);
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result = dns_db_getoriginnode(db, &node);
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assert_int_equal(result, ISC_R_SUCCESS);
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dns_db_detachnode(db, &node);
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dns_db_detach(&db);
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isc_loopmgr_shutdown(loopmgr);
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}
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/* test getservestalettl and setservestalettl */
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ISC_LOOP_TEST_IMPL(getsetservestalettl) {
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dns_db_t *db = NULL;
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isc_result_t result;
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dns_ttl_t ttl;
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result = dns_db_create(mctx, CACHEDB_DEFAULT, dns_rootname,
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dns_dbtype_cache, dns_rdataclass_in, 0, NULL,
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&db);
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assert_int_equal(result, ISC_R_SUCCESS);
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ttl = 5000;
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result = dns_db_getservestalettl(db, &ttl);
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assert_int_equal(result, ISC_R_SUCCESS);
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assert_int_equal(ttl, 0);
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ttl = 6 * 3600;
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result = dns_db_setservestalettl(db, ttl);
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assert_int_equal(result, ISC_R_SUCCESS);
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ttl = 5000;
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result = dns_db_getservestalettl(db, &ttl);
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assert_int_equal(result, ISC_R_SUCCESS);
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assert_int_equal(ttl, 6 * 3600);
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dns_db_detach(&db);
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isc_loopmgr_shutdown(loopmgr);
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}
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/* check DNS_DBFIND_STALEOK works */
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ISC_LOOP_TEST_IMPL(dns_dbfind_staleok) {
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dns_db_t *db = NULL;
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dns_dbnode_t *node = NULL;
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dns_fixedname_t example_fixed;
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dns_fixedname_t found_fixed;
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dns_name_t *example;
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dns_name_t *found;
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dns_rdatalist_t rdatalist;
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dns_rdataset_t rdataset;
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int count;
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int pass;
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isc_result_t result;
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unsigned char data[] = { 0x0a, 0x00, 0x00, 0x01 };
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result = dns_db_create(mctx, CACHEDB_DEFAULT, dns_rootname,
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dns_dbtype_cache, dns_rdataclass_in, 0, NULL,
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&db);
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assert_int_equal(result, ISC_R_SUCCESS);
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example = dns_fixedname_initname(&example_fixed);
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found = dns_fixedname_initname(&found_fixed);
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result = dns_name_fromstring(example, "example", dns_rootname, 0, NULL);
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assert_int_equal(result, ISC_R_SUCCESS);
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/*
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* Pass 0: default; no stale processing permitted.
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* Pass 1: stale processing for 1 second.
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* Pass 2: stale turned off after being on.
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*/
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for (pass = 0; pass < 3; pass++) {
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dns_rdata_t rdata = DNS_RDATA_INIT;
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/* 10.0.0.1 */
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rdata.data = data;
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rdata.length = 4;
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rdata.rdclass = dns_rdataclass_in;
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rdata.type = dns_rdatatype_a;
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dns_rdatalist_init(&rdatalist);
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rdatalist.ttl = 2;
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rdatalist.type = dns_rdatatype_a;
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rdatalist.rdclass = dns_rdataclass_in;
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ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
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switch (pass) {
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case 0:
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/* default: stale processing off */
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break;
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case 1:
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/* turn on stale processing */
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result = dns_db_setservestalettl(db, 1);
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assert_int_equal(result, ISC_R_SUCCESS);
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break;
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case 2:
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/* turn off stale processing */
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result = dns_db_setservestalettl(db, 0);
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assert_int_equal(result, ISC_R_SUCCESS);
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break;
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}
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dns_rdataset_init(&rdataset);
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dns_rdatalist_tordataset(&rdatalist, &rdataset);
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result = dns_db_findnode(db, example, true, &node);
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_addrdataset(db, node, NULL, 0, &rdataset, 0,
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NULL);
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assert_int_equal(result, ISC_R_SUCCESS);
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dns_db_detachnode(db, &node);
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dns_rdataset_disassociate(&rdataset);
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result = dns_db_find(db, example, NULL, dns_rdatatype_a, 0, 0,
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&node, found, &rdataset, NULL);
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assert_int_equal(result, ISC_R_SUCCESS);
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/*
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* May loop for up to 2 seconds performing non stale lookups.
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*/
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count = 0;
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do {
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count++;
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assert_in_range(count, 1, 21); /* loop sanity */
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assert_int_equal(rdataset.attributes &
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DNS_RDATASETATTR_STALE,
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0);
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assert_true(rdataset.ttl > 0);
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dns_db_detachnode(db, &node);
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dns_rdataset_disassociate(&rdataset);
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usleep(100000); /* 100 ms */
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result = dns_db_find(db, example, NULL, dns_rdatatype_a,
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0, 0, &node, found, &rdataset,
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NULL);
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} while (result == ISC_R_SUCCESS);
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assert_int_equal(result, ISC_R_NOTFOUND);
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/*
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* Check whether we can get stale data.
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*/
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result = dns_db_find(db, example, NULL, dns_rdatatype_a,
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DNS_DBFIND_STALEOK, 0, &node, found,
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&rdataset, NULL);
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switch (pass) {
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case 0:
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assert_int_equal(result, ISC_R_NOTFOUND);
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break;
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case 1:
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/*
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* Should loop for 1 second with stale lookups then
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* stop.
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*/
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count = 0;
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do {
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count++;
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assert_in_range(count, 0, 49); /* loop sanity */
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assert_int_equal(result, ISC_R_SUCCESS);
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assert_int_equal(rdataset.attributes &
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DNS_RDATASETATTR_STALE,
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DNS_RDATASETATTR_STALE);
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dns_db_detachnode(db, &node);
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dns_rdataset_disassociate(&rdataset);
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usleep(100000); /* 100 ms */
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result = dns_db_find(
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db, example, NULL, dns_rdatatype_a,
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DNS_DBFIND_STALEOK, 0, &node, found,
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&rdataset, NULL);
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} while (result == ISC_R_SUCCESS);
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/*
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* usleep(100000) can be slightly less than 10ms so
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* allow the count to reach 11.
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*/
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assert_in_range(count, 1, 11);
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assert_int_equal(result, ISC_R_NOTFOUND);
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break;
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case 2:
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assert_int_equal(result, ISC_R_NOTFOUND);
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break;
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}
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}
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dns_db_detach(&db);
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isc_loopmgr_shutdown(loopmgr);
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}
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/* database class */
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ISC_LOOP_TEST_IMPL(class) {
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isc_result_t result;
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dns_db_t *db = NULL;
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result = dns_db_create(mctx, ZONEDB_DEFAULT, dns_rootname,
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dns_dbtype_zone, dns_rdataclass_in, 0, NULL,
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&db);
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_load(db, TESTS_DIR "/testdata/db/data.db",
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dns_masterformat_text, 0);
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assert_int_equal(result, ISC_R_SUCCESS);
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assert_int_equal(dns_db_class(db), dns_rdataclass_in);
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dns_db_detach(&db);
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isc_loopmgr_shutdown(loopmgr);
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}
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/* database type */
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ISC_LOOP_TEST_IMPL(dbtype) {
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isc_result_t result;
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dns_db_t *db = NULL;
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/* DB has zone semantics */
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result = dns_db_create(mctx, ZONEDB_DEFAULT, dns_rootname,
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dns_dbtype_zone, dns_rdataclass_in, 0, NULL,
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&db);
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_load(db, TESTS_DIR "/testdata/db/data.db",
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dns_masterformat_text, 0);
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assert_int_equal(result, ISC_R_SUCCESS);
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assert_true(dns_db_iszone(db));
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assert_false(dns_db_iscache(db));
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dns_db_detach(&db);
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/* DB has cache semantics */
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result = dns_db_create(mctx, CACHEDB_DEFAULT, dns_rootname,
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dns_dbtype_cache, dns_rdataclass_in, 0, NULL,
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&db);
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assert_int_equal(result, ISC_R_SUCCESS);
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assert_true(dns_db_iscache(db));
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assert_false(dns_db_iszone(db));
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dns_db_detach(&db);
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isc_loopmgr_shutdown(loopmgr);
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}
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/* database versions */
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ISC_LOOP_TEST_IMPL(version) {
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isc_result_t result;
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dns_fixedname_t fname, ffound;
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dns_name_t *name, *foundname;
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dns_db_t *db = NULL;
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dns_dbversion_t *ver = NULL, *new = NULL;
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dns_dbnode_t *node = NULL;
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dns_rdataset_t rdataset;
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result = dns_test_loaddb(&db, dns_dbtype_zone, "test.test",
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TESTS_DIR "/testdata/db/data.db");
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assert_int_equal(result, ISC_R_SUCCESS);
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/* Open current version for reading */
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dns_db_currentversion(db, &ver);
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dns_test_namefromstring("b.test.test.", &fname);
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name = dns_fixedname_name(&fname);
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foundname = dns_fixedname_initname(&ffound);
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dns_rdataset_init(&rdataset);
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result = dns_db_find(db, name, ver, dns_rdatatype_a, 0, 0, &node,
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foundname, &rdataset, NULL);
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assert_int_equal(result, ISC_R_SUCCESS);
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dns_rdataset_disassociate(&rdataset);
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dns_db_detachnode(db, &node);
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dns_db_closeversion(db, &ver, false);
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/* Open new version for writing */
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dns_db_currentversion(db, &ver);
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dns_test_namefromstring("b.test.test.", &fname);
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name = dns_fixedname_name(&fname);
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foundname = dns_fixedname_initname(&ffound);
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dns_rdataset_init(&rdataset);
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result = dns_db_find(db, name, ver, dns_rdatatype_a, 0, 0, &node,
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foundname, &rdataset, NULL);
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_newversion(db, &new);
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assert_int_equal(result, ISC_R_SUCCESS);
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/* Delete the rdataset from the new version */
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result = dns_db_deleterdataset(db, node, new, dns_rdatatype_a, 0);
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assert_int_equal(result, ISC_R_SUCCESS);
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dns_rdataset_disassociate(&rdataset);
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dns_db_detachnode(db, &node);
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/* This should fail now */
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result = dns_db_find(db, name, new, dns_rdatatype_a, 0, 0, &node,
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foundname, &rdataset, NULL);
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assert_int_equal(result, DNS_R_NXDOMAIN);
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dns_db_closeversion(db, &new, true);
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/* But this should still succeed */
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result = dns_db_find(db, name, ver, dns_rdatatype_a, 0, 0, &node,
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foundname, &rdataset, NULL);
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assert_int_equal(result, ISC_R_SUCCESS);
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dns_rdataset_disassociate(&rdataset);
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dns_db_detachnode(db, &node);
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dns_db_closeversion(db, &ver, false);
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dns_db_detach(&db);
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isc_loopmgr_shutdown(loopmgr);
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}
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ISC_TEST_LIST_START
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ISC_TEST_ENTRY_CUSTOM(getoriginnode, setup_managers, teardown_managers)
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ISC_TEST_ENTRY_CUSTOM(getsetservestalettl, setup_managers, teardown_managers)
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ISC_TEST_ENTRY_CUSTOM(dns_dbfind_staleok, setup_managers, teardown_managers)
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ISC_TEST_ENTRY_CUSTOM(class, setup_managers, teardown_managers)
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ISC_TEST_ENTRY_CUSTOM(dbtype, setup_managers, teardown_managers)
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ISC_TEST_ENTRY_CUSTOM(version, setup_managers, teardown_managers)
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ISC_TEST_LIST_END
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ISC_TEST_MAIN
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