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Code Issues Releases Wiki Activity

808. [func] Add 'rndc flush' to flush the server's cache.

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This commit is contained in:
Brian Wellington
2001-04-11 20:37:50 +00:00
parent 9ffcab1e9a
commit c20ffa38de
13 changed files with 244 additions and 66 deletions
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83
lib/dns/cache.c
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@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: cache.c,v 1.35 2001/03/08 01:22:48 tale Exp $ */
/* $Id: cache.c,v 1.36 2001/04/11 20:37:42 bwelling Exp $ */
#include <config.h>
@@ -97,6 +97,9 @@ struct dns_cache {
dns_rdataclass_t rdclass;
dns_db_t *db;
cache_cleaner_t cleaner;
char *db_type;
int db_argc;
char **db_argv;
/* Locked by 'filelock'. */
char * filename;
@@ -124,6 +127,13 @@ cleaner_shutdown_action(isc_task_t *task, isc_event_t *event);
static void
overmem_cleaning_action(isc_task_t *task, isc_event_t *event);
static inline isc_result_t
cache_create_db(dns_cache_t *cache, dns_db_t **db) {
return (dns_db_create(cache->mctx, cache->db_type, dns_rootname,
dns_dbtype_cache, cache->rdclass,
cache->db_argc, cache->db_argv, db));
}
isc_result_t
dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
isc_timermgr_t *timermgr, dns_rdataclass_t rdclass,
@@ -132,6 +142,7 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
{
isc_result_t result;
dns_cache_t *cache;
int i;
REQUIRE(cachep != NULL);
REQUIRE(*cachep == NULL);
@@ -166,12 +177,37 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
cache->live_tasks = 0;
cache->rdclass = rdclass;
cache->db = NULL;
result = dns_db_create(cache->mctx, db_type, dns_rootname,
dns_dbtype_cache, rdclass, db_argc, db_argv,
&cache->db);
if (result != ISC_R_SUCCESS)
cache->db_type = isc_mem_strdup(mctx, db_type);
if (cache->db_type == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_filelock;
}
cache->db_argc = db_argc;
if (cache->db_argc == 0)
cache->db_argv = NULL;
else {
cache->db_argv = isc_mem_get(mctx,
cache->db_argc * sizeof(char *));
if (cache->db_argv == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_dbtype;
}
for (i = 0; i < cache->db_argc; i++)
cache->db_argv[i] = NULL;
for (i = 0; i < cache->db_argc; i++) {
cache->db_argv[i] = isc_mem_strdup(mctx, db_argv[i]);
if (cache->db_argv[i] == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_dbargv;
}
}
}
cache->db = NULL;
result = cache_create_db(cache, &cache->db);
if (result != ISC_R_SUCCESS)
goto cleanup_dbargv;
cache->filename = NULL;
@@ -187,6 +223,13 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
cleanup_db:
dns_db_detach(&cache->db);
cleanup_dbargv:
for (i = 0; i < cache->db_argc; i++)
if (cache->db_argv[i] != NULL)
isc_mem_free(mctx, cache->db_argv[i]);
isc_mem_put(mctx, cache->db_argv, cache->db_argc * sizeof(char *));
cleanup_dbtype:
isc_mem_free(mctx, cache->db_type);
cleanup_filelock:
DESTROYLOCK(&cache->filelock);
cleanup_lock:
@@ -200,6 +243,7 @@ dns_cache_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
static void
cache_free(dns_cache_t *cache) {
isc_mem_t *mctx;
int i;
REQUIRE(VALID_CACHE(cache));
REQUIRE(cache->references == 0);
@@ -223,9 +267,20 @@ cache_free(dns_cache_t *cache) {
cache->filename = NULL;
}
if (cache->db)
if (cache->db != NULL)
dns_db_detach(&cache->db);
if (cache->db_argv != NULL) {
for (i = 0; i < cache->db_argc; i++)
if (cache->db_argv[i] != NULL)
isc_mem_free(cache->mctx, cache->db_argv[i]);
isc_mem_put(cache->mctx, cache->db_argv,
cache->db_argc * sizeof(char *));
}
if (cache->db_type != NULL)
isc_mem_free(cache->mctx, cache->db_type);
DESTROYLOCK(&cache->lock);
DESTROYLOCK(&cache->filelock);
cache->magic = 0;
@@ -802,3 +857,17 @@ cleaner_shutdown_action(isc_task_t *task, isc_event_t *event) {
if (should_free)
cache_free(cache);
}
isc_result_t
dns_cache_flush(dns_cache_t *cache) {
dns_db_t *db = NULL;
isc_result_t result;
result = cache_create_db(cache, &db);
if (result != ISC_R_SUCCESS)
return (result);
dns_db_detach(&cache->db);
cache->db = db;
return (ISC_R_SUCCESS);
}