/* cache.c - routines to maintain an in-core cache of entries */
/* $OpenLDAP$ */
-/*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2005 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
/* LDBM backend specific entry info -- visible only to the cache */
typedef struct ldbm_entry_info {
- ldap_pvt_thread_rdwr_t lei_rdwr; /* reader/writer lock */
-
/*
- * remaining fields require backend cache lock to access
* These items are specific to the LDBM backend and should
- * be hidden.
+ * be hidden. Backend cache lock required to access.
*/
int lei_state; /* for the cache */
#define CACHE_ENTRY_UNDEFINED 0
static void lru_print(Cache *cache);
#endif
-static int
-cache_entry_rdwr_lock(Entry *e, int rw)
-{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY,
- "cache_entry_rdwr_lock: %s lock on ID %ld\n",
- rw ? "w" : "r", e->e_id ));
-#else
- Debug( LDAP_DEBUG_ARGS, "entry_rdwr_%slock: ID: %ld\n",
- rw ? "w" : "r", e->e_id, 0);
-#endif
-
-
- if (rw)
- return ldap_pvt_thread_rdwr_wlock(&LEI(e)->lei_rdwr);
- else
- return ldap_pvt_thread_rdwr_rlock(&LEI(e)->lei_rdwr);
-}
-
-static int
-cache_entry_rdwr_trylock(Entry *e, int rw)
-{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY,
- "cache_entry_rdwr_trylock: try %s lock on ID: %ld.\n",
- rw ? "w" : "r", e->e_id ));
-#else
- Debug( LDAP_DEBUG_ARGS, "entry_rdwr_%strylock: ID: %ld\n",
- rw ? "w" : "r", e->e_id, 0);
-#endif
-
-
- if (rw)
- return ldap_pvt_thread_rdwr_wtrylock(&LEI(e)->lei_rdwr);
- else
- return ldap_pvt_thread_rdwr_rtrylock(&LEI(e)->lei_rdwr);
-}
-
-static int
-cache_entry_rdwr_unlock(Entry *e, int rw)
-{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY,
- "cache_entry_rdwr_unlock: remove %s lock on ID %ld.\n",
- rw ? "w" : "r", e->e_id ));
-#else
- Debug( LDAP_DEBUG_ARGS, "entry_rdwr_%sunlock: ID: %ld\n",
- rw ? "w" : "r", e->e_id, 0);
-#endif
-
-
- if (rw)
- return ldap_pvt_thread_rdwr_wunlock(&LEI(e)->lei_rdwr);
- else
- return ldap_pvt_thread_rdwr_runlock(&LEI(e)->lei_rdwr);
-}
-
-static int
-cache_entry_rdwr_init(Entry *e)
-{
- return ldap_pvt_thread_rdwr_init( &LEI(e)->lei_rdwr );
-}
-
-static int
-cache_entry_rdwr_destroy(Entry *e)
-{
- return ldap_pvt_thread_rdwr_destroy( &LEI(e)->lei_rdwr );
-}
-
static int
cache_entry_private_init( Entry*e )
{
e->e_private = ch_calloc(1, sizeof(struct ldbm_entry_info));
- if( cache_entry_rdwr_init( e ) != 0 ) {
- free( LEI(e) );
- e->e_private = NULL;
- return 1;
- }
-
return 0;
}
{
assert( e->e_private );
- cache_entry_rdwr_destroy( e );
-
free( e->e_private );
e->e_private = NULL;
return 0;
ID id;
int refcnt, freeit = 1;
+ if ( slapMode != SLAP_SERVER_MODE ) {
+ return;
+ }
+
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
assert( e->e_private );
- cache_entry_rdwr_unlock(e, rw);
-
id = e->e_id;
refcnt = --LEI(e)->lei_refcnt;
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_return_entry_rw: return (%ld):%s, refcnt=%d\n",
- id, rw ? "w" : "r", refcnt ));
-#else
Debug( LDAP_DEBUG_TRACE,
"====> cache_return_entry_%s( %ld ): created (%d)\n",
rw ? "w" : "r", id, refcnt );
-#endif
-
} else if ( LEI(e)->lei_state == CACHE_ENTRY_DELETED ) {
if( refcnt > 0 ) {
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_return_entry_rw: %ld, delete pending (%d).\n",
- id, refcnt ));
-#else
Debug( LDAP_DEBUG_TRACE,
"====> cache_return_entry_%s( %ld ): delete pending (%d)\n",
rw ? "w" : "r", id, refcnt );
-#endif
-
} else {
cache_entry_private_destroy( e );
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_return_entry_rw: (%ld): deleted (%d)\n",
- id, refcnt ));
-#else
Debug( LDAP_DEBUG_TRACE,
"====> cache_return_entry_%s( %ld ): deleted (%d)\n",
rw ? "w" : "r", id, refcnt );
-#endif
-
}
} else {
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_return_entry_rw: ID %ld:%s returned (%d)\n",
- id, rw ? "w": "r", refcnt ));
-#else
Debug( LDAP_DEBUG_TRACE,
"====> cache_return_entry_%s( %ld ): returned (%d)\n",
rw ? "w" : "r", id, refcnt);
-#endif
-
}
}
int i, rc;
Entry *ee;
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY,
- "cache_add_entry_rw: add (%s):%s to cache\n",
- e->e_dn, rw ? "w" : "r" ));
-#endif
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ERR,
- "cache_add_entry_rw: add (%s):%ld private init failed!\n",
- e->e_dn, e->e_id ));
-#else
Debug( LDAP_DEBUG_ANY,
"====> cache_add_entry( %ld ): \"%s\": private init failed!\n",
e->e_id, e->e_dn, 0 );
-#endif
-
return( -1 );
}
if ( avl_insert( &cache->c_dntree, (caddr_t) e,
- (AVL_CMP) entry_dn_cmp, avl_dup_error ) != 0 )
+ entry_dn_cmp, avl_dup_error ) != 0 )
{
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_add_entry: (%s):%ld already in cache.\n",
- e->e_dn, e->e_id ));
-#else
Debug( LDAP_DEBUG_TRACE,
"====> cache_add_entry( %ld ): \"%s\": already in dn cache\n",
e->e_id, e->e_dn, 0 );
-#endif
-
cache_entry_private_destroy(e);
/* id tree */
if ( avl_insert( &cache->c_idtree, (caddr_t) e,
- (AVL_CMP) entry_id_cmp, avl_dup_error ) != 0 )
+ entry_id_cmp, avl_dup_error ) != 0 )
{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_add_entry: (%s):%ls already in cache.\n",
- e->e_dn, e->e_id ));
-#else
Debug( LDAP_DEBUG_ANY,
"====> cache_add_entry( %ld ): \"%s\": already in id cache\n",
e->e_id, e->e_dn, 0 );
-#endif
-
-
/* delete from dn tree inserted above */
if ( avl_delete( &cache->c_dntree, (caddr_t) e,
- (AVL_CMP) entry_dn_cmp ) == NULL )
+ entry_dn_cmp ) == NULL )
{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_INFO,
- "cache_add_entry: can't delete (%s) from cache.\n",
- e->e_dn ));
-#else
Debug( LDAP_DEBUG_ANY, "====> can't delete from dn cache\n",
0, 0, 0 );
-#endif
-
}
cache_entry_private_destroy(e);
return( -1 );
}
- cache_entry_rdwr_lock( e, rw );
-
/* put the entry into 'CREATING' state */
/* will be marked after when entry is returned */
LEI(e)->lei_state = CACHE_ENTRY_CREATING;
assert( e->e_private );
if ( avl_insert( &cache->c_dntree, (caddr_t) e,
- (AVL_CMP) entry_dn_cmp, avl_dup_error ) != 0 )
+ entry_dn_cmp, avl_dup_error ) != 0 )
{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_update_entry: (%s):%ld already in dn cache\n",
- e->e_dn, e->e_id ));
-#else
Debug( LDAP_DEBUG_TRACE,
"====> cache_update_entry( %ld ): \"%s\": already in dn cache\n",
e->e_id, e->e_dn, 0 );
-#endif
-
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
/* id tree */
if ( avl_insert( &cache->c_idtree, (caddr_t) e,
- (AVL_CMP) entry_id_cmp, avl_dup_error ) != 0 )
+ entry_id_cmp, avl_dup_error ) != 0 )
{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_update_entry: (%s)%ld already in id cache\n",
- e->e_dn, e->e_id ));
-#else
Debug( LDAP_DEBUG_ANY,
"====> cache_update_entry( %ld ): \"%s\": already in id cache\n",
e->e_id, e->e_dn, 0 );
-#endif
-
/* delete from dn tree inserted above */
if ( avl_delete( &cache->c_dntree, (caddr_t) e,
- (AVL_CMP) entry_dn_cmp ) == NULL )
+ entry_dn_cmp ) == NULL )
{
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_INFO,
- "cache_update_entry: can't delete (%s)%ld from dn cache.\n",
- e->e_dn, e->e_id ));
-#else
Debug( LDAP_DEBUG_ANY, "====> can't delete from dn cache\n",
0, 0, 0 );
-#endif
-
}
/* free cache mutex */
return( -1 );
}
-
/* put the entry into 'CREATING' state */
/* will be marked after when entry is returned */
LEI(e)->lei_state = CACHE_ENTRY_CREATING;
return( 0 );
}
-/*
- * cache_find_entry_dn2id - find an entry in the cache, given dn
- */
-
-ID
-cache_find_entry_dn2id(
- Backend *be,
- Cache *cache,
- const char *dn
-)
-{
- int rc;
- struct berval bv;
- struct berval ndn;
- ID id;
-
- bv.bv_val = (char *)dn;
- bv.bv_len = strlen( dn );
-
- rc = dnNormalize2( NULL, &bv, &ndn );
- if( rc != LDAP_SUCCESS ) {
- return NOID;
- }
-
- id = cache_find_entry_ndn2id( be, cache, ndn.bv_val );
-
- free( ndn.bv_val );
- return ( id );
-}
-
ID
cache_find_entry_ndn2id(
Backend *be,
Cache *cache,
- const char *ndn
+ struct berval *ndn
)
{
Entry e, *ep;
int count = 0;
/* this function is always called with normalized DN */
- e.e_ndn = (char *)ndn;
+ e.e_nname = *ndn;
try_again:
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
if ( (ep = (Entry *) avl_find( cache->c_dntree, (caddr_t) &e,
- (AVL_CMP) entry_dn_cmp )) != NULL )
+ entry_dn_cmp )) != NULL )
{
int state;
count++;
* we do not need to lock the entry if we only
* check the state, refcnt, LRU, and id.
*/
-
assert( ep->e_private );
/* save id */
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_INFO,
- "cache_find_entry_dn2id: (%s) %ld not ready: %d\n",
- ndn, id, state ));
-#else
Debug(LDAP_DEBUG_TRACE,
- "====> cache_find_entry_dn2id(\"%s\"): %ld (not ready) %d\n",
- ndn, id, state);
-#endif
-
+ "====> cache_find_entry_ndn2id(\"%s\"): %ld (not ready) %d\n",
+ ndn->bv_val, id, state);
ldap_pvt_thread_yield();
goto try_again;
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_find_entry_dn2id: (%s): %ld %d tries\n",
- ndn, id, count ));
-#else
Debug(LDAP_DEBUG_TRACE,
- "====> cache_find_entry_dn2id(\"%s\"): %ld (%d tries)\n",
- ndn, id, count);
-#endif
-
+ "====> cache_find_entry_ndn2id(\"%s\"): %ld (%d tries)\n",
+ ndn->bv_val, id, count);
} else {
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-
id = NOID;
}
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
if ( (ep = (Entry *) avl_find( cache->c_idtree, (caddr_t) &e,
- (AVL_CMP) entry_id_cmp )) != NULL )
+ entry_id_cmp )) != NULL )
{
int state;
ID ep_id;
* entry is deleted or not fully created yet
*/
if ( state != CACHE_ENTRY_READY ) {
-
assert(state != CACHE_ENTRY_UNDEFINED);
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_INFO,
- "cache_find_entry_id: (%ld)->%ld not ready (%d).\n",
- id, ep_id, state ));
-
-#else
Debug(LDAP_DEBUG_TRACE,
"====> cache_find_entry_id( %ld ): %ld (not ready) %d\n",
id, ep_id, state);
-#endif
-
-
- ldap_pvt_thread_yield();
- goto try_again;
- }
-
- /* acquire reader lock */
- if ( cache_entry_rdwr_trylock(ep, rw) == LDAP_PVT_THREAD_EBUSY ) {
- /* could not acquire entry lock...
- * owner cannot free as we have the cache locked.
- * so, unlock the cache, yield, and try again.
- */
-
- /* free cache mutex */
- ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_INFO,
- "cache_find_entry_id: %ld -> %ld (busy) %d.\n",
- id, ep_id, state ));
-#else
- Debug(LDAP_DEBUG_TRACE,
- "====> cache_find_entry_id( %ld ): %ld (busy) %d\n",
- id, ep_id, state);
-#endif
-
ldap_pvt_thread_yield();
goto try_again;
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_DETAIL1,
- "cache_find_entry_id: %ld -> %s found %d tries.\n",
- ep_id, ep->e_dn, count ));
-#else
Debug(LDAP_DEBUG_TRACE,
"====> cache_find_entry_id( %ld ) \"%s\" (found) (%d tries)\n",
ep_id, ep->e_dn, count);
-#endif
-
return( ep );
}
assert( e->e_private );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY,
- "cache_delete_entry: delete %ld.\n", e->e_id ));
-#else
Debug( LDAP_DEBUG_TRACE, "====> cache_delete_entry( %ld )\n",
e->e_id, 0, 0 );
-#endif
-
rc = cache_delete_entry_internal( cache, e );
int rc = 0; /* return code */
/* dn tree */
- if ( avl_delete( &cache->c_dntree, (caddr_t) e, (AVL_CMP) entry_dn_cmp )
- == NULL )
+ if ( avl_delete( &cache->c_dntree, (caddr_t) e, entry_dn_cmp ) == NULL )
{
rc = -1;
}
/* id tree */
- if ( avl_delete( &cache->c_idtree, (caddr_t) e, (AVL_CMP) entry_id_cmp )
- == NULL )
+ if ( avl_delete( &cache->c_idtree, (caddr_t) e, entry_id_cmp ) == NULL )
{
rc = -1;
}
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY,
- "cache_release_all: enter\n" ));
-#else
Debug( LDAP_DEBUG_TRACE, "====> cache_release_all\n", 0, 0, 0 );
-#endif
while ( (e = cache->c_lrutail) != NULL && LEI(e)->lei_refcnt == 0 ) {
-#ifdef LDAP_RDWR_DEBUG
- assert(!ldap_pvt_thread_rdwr_active(&LEI(e)->lei_rdwr));
-#endif
-
/* delete from cache and lru q */
/* XXX do we need rc ? */
rc = cache_delete_entry_internal( cache, e );
}
if ( cache->c_cursize ) {
-#ifdef NEW_LOGGING
- LDAP_LOG(( "cache", LDAP_LEVEL_INFO,
- "cache_release_all: Entry cache could not be emptied.\n" ));
-#else
Debug( LDAP_DEBUG_TRACE, "Entry-cache could not be emptied\n", 0, 0, 0 );
-#endif
-
}
/* free cache mutex */
}
#ifdef LDAP_DEBUG
-
static void
lru_print( Cache *cache )
{
e->e_dn, e->e_id, LEI(e)->lei_refcnt );
}
}
-
#endif
-
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