mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-29 13:38:26 +00:00
Fully implement the cachefile option, which allows persistent caching. This
removes some unused code in view.c and uncomments some code in cache.c. This still isn't really usable, since the trust level of cached data is not persistent, so all data in the persistent cache will be promoted to "ultimate" trust on reload.
This commit is contained in:
Brian Wellington
parent
619ee46ac6
commit
f0e246e271
@ -15,7 +15,7 @@
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: server.c,v 1.280 2001/01/12 00:37:11 bwelling Exp $ */
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/* $Id: server.c,v 1.281 2001/01/12 22:22:14 bwelling Exp $ */
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#include <config.h>
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@ -417,6 +417,8 @@ configure_view(dns_view_t *view, dns_c_ctx_t *cctx, dns_c_view_t *cview,
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dns_dispatch_t *dispatch4 = NULL;
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dns_dispatch_t *dispatch6 = NULL;
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in_port_t port;
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isc_boolean_t reused_cache = ISC_FALSE;
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char *cachefile = NULL;
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REQUIRE(DNS_VIEW_VALID(view));
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@ -460,6 +462,7 @@ configure_view(dns_view_t *view, dns_c_ctx_t *cctx, dns_c_view_t *cview,
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isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
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NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(3),
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"reusing existing cache");
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reused_cache = ISC_TRUE;
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dns_cache_attach(pview->cache, &cache);
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dns_view_detach(&pview);
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} else {
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@ -469,6 +472,18 @@ configure_view(dns_view_t *view, dns_c_ctx_t *cctx, dns_c_view_t *cview,
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}
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dns_view_setcache(view, cache);
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if (cview != NULL)
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result = dns_c_view_getcachefile(cview, &cachefile);
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else
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result = dns_c_ctx_getcachefile(cctx, &cachefile);
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if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
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goto cleanup;
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if (cachefile != NULL) {
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dns_cache_setfilename(cache, cachefile);
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if (!reused_cache)
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CHECK(dns_cache_load(cache));
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}
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result = ISC_R_NOTFOUND;
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if (cview != NULL)
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result = dns_c_view_getcleaninterval(cview,
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@ -706,32 +721,6 @@ configure_view(dns_view_t *view, dns_c_ctx_t *cctx, dns_c_view_t *cview,
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val = 7 * 24 * 3600;
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view->maxncachettl = val;
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}
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{
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char *cachefile = NULL, *p = NULL;
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if (cview != NULL)
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result = dns_c_view_getcachefile(cview, &cachefile);
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else
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result = dns_c_ctx_getcachefile(cctx, &cachefile);
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if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
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goto cleanup;
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if (cachefile != NULL) {
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p = isc_mem_strdup(view->mctx, cachefile);
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if (p == NULL) {
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result = ISC_R_NOMEMORY;
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goto cleanup;
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}
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}
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if (view->cachefile != NULL)
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isc_mem_free(view->mctx, view->cachefile);
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view->cachefile = p;
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if (view->cachefile != NULL) {
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isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
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NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
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"loading cache '%s'", view->cachefile);
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/* DNS_R_SEENINCLUDE should be impossible here. */
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CHECK(dns_db_load(view->cachedb, view->cachefile));
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}
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}
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result = ISC_R_SUCCESS;
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@ -15,7 +15,7 @@
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: cache.c,v 1.32 2001/01/09 21:50:40 bwelling Exp $ */
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/* $Id: cache.c,v 1.33 2001/01/12 22:22:15 bwelling Exp $ */
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#include <config.h>
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@ -30,6 +30,7 @@
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#include <dns/dbiterator.h>
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#include <dns/events.h>
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#include <dns/log.h>
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#include <dns/masterdump.h>
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#include <dns/result.h>
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#define CACHE_MAGIC 0x24242424U /* $$$$. */
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@ -151,6 +152,15 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
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goto cleanup_mem;
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}
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result = isc_mutex_init(&cache->filelock);
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if (result != ISC_R_SUCCESS) {
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UNEXPECTED_ERROR(__FILE__, __LINE__,
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"isc_mutex_init() failed: %s",
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dns_result_totext(result));
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result = ISC_R_UNEXPECTED;
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goto cleanup_lock;
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}
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cache->references = 1;
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cache->live_tasks = 0;
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cache->rdclass = rdclass;
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@ -160,7 +170,7 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
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dns_dbtype_cache, rdclass, db_argc, db_argv,
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&cache->db);
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if (result != ISC_R_SUCCESS)
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goto cleanup_mutex;
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goto cleanup_filelock;
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cache->filename = NULL;
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@ -176,7 +186,9 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
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cleanup_db:
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dns_db_detach(&cache->db);
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cleanup_mutex:
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cleanup_filelock:
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DESTROYLOCK(&cache->filelock);
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cleanup_lock:
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DESTROYLOCK(&cache->lock);
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cleanup_mem:
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isc_mem_put(mctx, cache, sizeof *cache);
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@ -214,6 +226,7 @@ cache_free(dns_cache_t *cache) {
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dns_db_detach(&cache->db);
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DESTROYLOCK(&cache->lock);
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DESTROYLOCK(&cache->filelock);
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cache->magic = 0;
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mctx = cache->mctx;
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isc_mem_put(cache->mctx, cache, sizeof *cache);
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@ -253,6 +266,12 @@ dns_cache_detach(dns_cache_t **cachep) {
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UNLOCK(&cache->lock);
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*cachep = NULL;
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if (free_cache) {
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/*
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* When the cache is shut down, dump it to a file if one is
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* specified.
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*/
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dns_cache_dump(cache);
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/* XXXRTH This is not locked! */
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if (cache->live_tasks > 0)
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isc_task_shutdown(cache->cleaner.task);
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@ -271,12 +290,14 @@ dns_cache_attachdb(dns_cache_t *cache, dns_db_t **dbp) {
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UNLOCK(&cache->lock);
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}
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#ifdef NOTYET
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/* ARGSUSED */
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isc_result_t
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dns_cache_setfilename(dns_cache_t *cahce, char *filename) {
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char *newname = isc_mem_strdup(filename);
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dns_cache_setfilename(dns_cache_t *cache, char *filename) {
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char *newname;
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REQUIRE(VALID_CACHE(cache));
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REQUIRE(filename != NULL);
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newname = isc_mem_strdup(cache->mctx, filename);
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if (newname == NULL)
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return (ISC_R_NOMEMORY);
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LOCK(&cache->filelock);
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@ -290,10 +311,12 @@ dns_cache_setfilename(dns_cache_t *cahce, char *filename) {
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isc_result_t
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dns_cache_load(dns_cache_t *cache) {
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isc_result_t result;
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REQUIRE(VALID_CACHE(cache));
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if (cache->filename == NULL)
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return (ISC_R_SUCCESS);
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LOCK(&cache->filelock);
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/* XXX handle TTLs in a way appropriate for the cache */
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result = dns_db_load(cache->db, cache->filename);
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UNLOCK(&cache->filelock);
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return (result);
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@ -301,11 +324,18 @@ dns_cache_load(dns_cache_t *cache) {
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isc_result_t
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dns_cache_dump(dns_cache_t *cache) {
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/* XXX to be written */
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return (ISC_R_NOTIMPLEMENTED);
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}
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isc_result_t result;
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#endif
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REQUIRE(VALID_CACHE(cache));
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LOCK(&cache->filelock);
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if (cache->filename == NULL)
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return (ISC_R_SUCCESS);
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result = dns_master_dump(cache->mctx, cache->db, NULL,
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&dns_master_style_cache, cache->filename);
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UNLOCK(&cache->filelock);
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return (result);
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}
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void
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dns_cache_setcleaninginterval(dns_cache_t *cache, unsigned int t) {
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@ -15,7 +15,7 @@
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: view.h,v 1.63 2001/01/09 21:53:40 bwelling Exp $ */
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/* $Id: view.h,v 1.64 2001/01/12 22:22:17 bwelling Exp $ */
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#ifndef DNS_VIEW_H
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#define DNS_VIEW_H 1
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@ -115,7 +115,6 @@ struct dns_view {
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dns_ttl_t maxcachettl;
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dns_ttl_t maxncachettl;
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in_port_t dstport;
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char * cachefile;
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/*
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* Configurable data for server use only,
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@ -644,21 +643,6 @@ dns_view_dialup(dns_view_t *view);
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* Perform dialup-time maintenance on the zones of 'view'.
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*/
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isc_result_t
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dns_view_dumpcache(dns_view_t *view);
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/*
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* Dump the view's cache to the the view's cache file.
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*
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* Requires:
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*
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* 'view' is valid.
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*
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* Returns:
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* ISC_R_SUCCESS The cache was successfully dumped.
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* ISC_R_IGNORE No cachefile was specified.
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* others An error occurred (see dns_master_dump)
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*/
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isc_result_t
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dns_view_dumpdbtostream(dns_view_t *view, FILE *fp);
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/*
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@ -678,7 +662,6 @@ dns_view_dumpdbtostream(dns_view_t *view, FILE *fp);
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*
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* Returns:
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* ISC_R_SUCCESS The cache was successfully dumped.
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* ISC_R_IGNORE No cachefile was specified.
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* others An error occurred (see dns_master_dump)
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*/
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@ -15,7 +15,7 @@
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: view.c,v 1.91 2001/01/09 21:51:44 bwelling Exp $ */
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/* $Id: view.c,v 1.92 2001/01/12 22:22:16 bwelling Exp $ */
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#include <config.h>
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@ -164,7 +164,6 @@ dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
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view->maxcachettl = 7 * 24 * 3600;
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view->maxncachettl = 3 * 3600;
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view->dstport = 53;
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view->cachefile = NULL;
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result = dns_peerlist_new(view->mctx, &view->peers);
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if (result != ISC_R_SUCCESS)
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@ -256,8 +255,6 @@ destroy(dns_view_t *view) {
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dns_acl_detach(&view->v6synthesisacl);
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if (view->sortlist != NULL)
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dns_acl_detach(&view->sortlist);
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if (view->cachefile != NULL)
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isc_mem_free(view->mctx, view->cachefile);
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dns_keytable_detach(&view->trustedkeys);
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dns_keytable_detach(&view->secroots);
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dns_fwdtable_destroy(&view->fwdtable);
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@ -1100,17 +1097,6 @@ dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg) {
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view->dynamickeys));
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}
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isc_result_t
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dns_view_dumpcache(dns_view_t *view) {
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REQUIRE(DNS_VIEW_VALID(view));
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if (view->cachefile == NULL)
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return (ISC_R_IGNORE);
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return (dns_master_dump(view->mctx, view->cachedb, NULL,
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&dns_master_style_default, view->cachefile));
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}
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isc_result_t
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dns_view_dumpdbtostream(dns_view_t *view, FILE *fp) {
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isc_result_t result;
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@ -1119,7 +1105,7 @@ dns_view_dumpdbtostream(dns_view_t *view, FILE *fp) {
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(void)fprintf(fp, ";\n; Cache dump of view '%s'\n;\n", view->name);
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result = dns_master_dumptostream(view->mctx, view->cachedb, NULL,
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&dns_master_style_explicitttl, fp);
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&dns_master_style_cache, fp);
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if (result != ISC_R_SUCCESS)
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return (result);
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#ifdef notyet /* clean up adb dump format first */
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