/* cache.c - routines to maintain an in-core cache of entries */
/* $OpenLDAP$ */
-/*
- * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2004 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"
#endif
static EntryInfo *
-bdb_cache_entryinfo_new( )
+bdb_cache_entryinfo_new( Cache *cache )
{
- EntryInfo *ei;
+ EntryInfo *ei = NULL;
- ei = ch_calloc(1, sizeof(struct bdb_entry_info));
- ldap_pvt_thread_mutex_init( &ei->bei_kids_mutex );
+ if ( cache->c_eifree ) {
+ ldap_pvt_thread_rdwr_wlock( &cache->c_rwlock );
+ if ( cache->c_eifree ) {
+ ei = cache->c_eifree;
+ cache->c_eifree = ei->bei_lrunext;
+ }
+ ldap_pvt_thread_rdwr_wunlock( &cache->c_rwlock );
+ }
+ if ( ei ) {
+ ei->bei_lrunext = NULL;
+ ei->bei_state = 0;
+ } else {
+ ei = ch_calloc(1, sizeof(struct bdb_entry_info));
+ ldap_pvt_thread_mutex_init( &ei->bei_kids_mutex );
+ }
return ei;
}
return rc;
#endif
}
+
static int
-bdb_cache_entry_db_lock
-( DB_ENV *env, u_int32_t locker, EntryInfo *ei, int rw, int tryOnly, DB_LOCK *lock )
+bdb_cache_entry_db_lock( DB_ENV *env, u_int32_t locker, EntryInfo *ei,
+ int rw, int tryOnly, DB_LOCK *lock )
{
#ifdef NO_THREADS
return 0;
}
int
-bdb_cache_entry_db_unlock
-( DB_ENV *env, DB_LOCK *lock )
+bdb_cache_entry_db_unlock ( DB_ENV *env, DB_LOCK *lock )
{
#ifdef NO_THREADS
return 0;
#else
int rc;
+ if ( !lock ) return 0;
+
rc = LOCK_PUT ( env, lock );
return rc;
#endif
{
const EntryInfo *e1 = v_e1, *e2 = v_e2;
int rc = e1->bei_nrdn.bv_len - e2->bei_nrdn.bv_len;
- if (rc == 0) rc = strncmp( e1->bei_nrdn.bv_val, e2->bei_nrdn.bv_val,
- e1->bei_nrdn.bv_len );
+ if (rc == 0) {
+ rc = strncmp( e1->bei_nrdn.bv_val, e2->bei_nrdn.bv_val,
+ e1->bei_nrdn.bv_len );
+ }
return rc;
}
bdb_entryinfo_add_internal(
struct bdb_info *bdb,
EntryInfo *ei,
- EntryInfo **res,
- u_int32_t locker
-)
+ EntryInfo **res )
{
EntryInfo *ei2 = NULL;
*res = NULL;
- ei2 = bdb_cache_entryinfo_new();
+ ei2 = bdb_cache_entryinfo_new( &bdb->bi_cache );
ldap_pvt_thread_rdwr_wlock( &bdb->bi_cache.c_rwlock );
bdb_cache_entryinfo_lock( ei->bei_parent );
ber_dupbv( &ei2->bei_nrdn, &ei->bei_nrdn );
avl_insert( &ei->bei_parent->bei_kids, ei2, bdb_rdn_cmp,
avl_dup_error );
+#ifdef BDB_HIER
+ ei->bei_parent->bei_ckids++;
+#endif
}
*res = ei2;
Operation *op,
DB_TXN *txn,
struct berval *ndn,
- EntryInfo **res,
- u_int32_t locker
-)
+ EntryInfo **res )
{
struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
EntryInfo ei, *eip, *ei2;
if ( !ei2 ) {
int len = ei.bei_nrdn.bv_len;
- ei.bei_nrdn.bv_len = ndn->bv_len - (ei.bei_nrdn.bv_val - ndn->bv_val);
+ ei.bei_nrdn.bv_len = ndn->bv_len -
+ (ei.bei_nrdn.bv_val - ndn->bv_val);
bdb_cache_entryinfo_unlock( eip );
rc = bdb_dn2id( op, txn, &ei.bei_nrdn, &ei );
/* DN exists but needs to be added to cache */
ei.bei_nrdn.bv_len = len;
- rc = bdb_entryinfo_add_internal( bdb, &ei, &ei2,
- locker );
+ rc = bdb_entryinfo_add_internal( bdb, &ei, &ei2 );
/* add_internal left eip and c_rwlock locked */
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
if ( rc ) {
/* Advance to next lower RDN */
for (ptr = ei.bei_nrdn.bv_val - 2; ptr > ndn->bv_val
- && !DN_SEPARATOR(*ptr); ptr--);
+ && !DN_SEPARATOR(*ptr); ptr--) /* empty */;
if ( ptr >= ndn->bv_val ) {
if (DN_SEPARATOR(*ptr)) ptr++;
ei.bei_nrdn.bv_len = ei.bei_nrdn.bv_val - ptr - 1;
Operation *op,
DB_TXN *txn,
ID id,
- EntryInfo **res
-)
+ EntryInfo **res )
{
struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
EntryInfo ei, eip, *ei2 = NULL, *ein = NULL, *eir = NULL;
ei2 = ein;
/* Create a new node for the current ID */
- ein = bdb_cache_entryinfo_new();
+ ein = bdb_cache_entryinfo_new( &bdb->bi_cache );
ein->bei_id = ei.bei_id;
ein->bei_kids = ei.bei_kids;
ein->bei_nrdn = ei.bei_nrdn;
}
return rc;
}
+
+/* Used by hdb_dn2idl when loading the EntryInfo for all the children
+ * of a given node
+ */
+int hdb_cache_load(
+ struct bdb_info *bdb,
+ EntryInfo *ei,
+ EntryInfo **res )
+{
+ EntryInfo *ei2;
+ int rc;
+
+ /* See if we already have this one */
+ bdb_cache_entryinfo_lock( ei->bei_parent );
+ ei2 = (EntryInfo *)avl_find( ei->bei_parent->bei_kids, ei, bdb_rdn_cmp );
+ bdb_cache_entryinfo_unlock( ei->bei_parent );
+
+ if ( !ei2 ) {
+ /* Not found, add it */
+ struct berval bv;
+
+ /* bei_rdn was not malloc'd before, do it now */
+ ber_dupbv( &bv, &ei->bei_rdn );
+ ei->bei_rdn = bv;
+
+ rc = bdb_entryinfo_add_internal( bdb, ei, res );
+ bdb_cache_entryinfo_unlock( ei->bei_parent );
+ ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
+ } else {
+ /* Found, return it */
+ *res = ei2;
+ return 0;
+ }
+ return rc;
+}
#endif
/* caller must have lru_mutex locked. mutex
bdb_cache_lru_add(
struct bdb_info *bdb,
u_int32_t locker,
- EntryInfo *ei
-)
+ EntryInfo *ei )
{
- DB_LOCK lock;
+ DB_LOCK lock, *lockp;
+
+ if ( locker ) {
+ lockp = &lock;
+ } else {
+ lockp = NULL;
+ }
/* See if we're above the cache size limit */
if ( bdb->bi_cache.c_cursize > bdb->bi_cache.c_maxsize ) {
* the object is idle.
*/
if ( bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, elru, 1, 1,
- &lock ) == 0 ) {
+ lockp ) == 0 ) {
/* If there's no entry, or this node is in
* the process of linking into the cache,
* skip it.
*/
if ( !elru->bei_e || (elru->bei_state & CACHE_ENTRY_NOT_LINKED) ) {
- bdb_cache_entry_db_unlock( bdb->bi_dbenv, &lock );
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lockp );
continue;
}
LRU_DELETE( &bdb->bi_cache, elru );
elru->bei_e->e_private = NULL;
bdb_entry_return( elru->bei_e );
elru->bei_e = NULL;
- bdb_cache_entry_db_unlock( bdb->bi_dbenv, &lock );
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lockp );
--bdb->bi_cache.c_cursize;
if (bdb->bi_cache.c_cursize < bdb->bi_cache.c_maxsize)
break;
ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.lru_mutex );
}
+EntryInfo *
+bdb_cache_find_info(
+ struct bdb_info *bdb,
+ ID id )
+{
+ EntryInfo ei, *ei2;
+
+ ei.bei_id = id;
+
+ ldap_pvt_thread_rdwr_rlock( &bdb->bi_cache.c_rwlock );
+ ei2 = (EntryInfo *) avl_find( bdb->bi_cache.c_idtree,
+ (caddr_t) &ei, bdb_id_cmp );
+ ldap_pvt_thread_rdwr_runlock( &bdb->bi_cache.c_rwlock );
+ return ei2;
+}
+
/*
* cache_find_id - find an entry in the cache, given id.
* The entry is locked for Read upon return. Call with islocked TRUE if
EntryInfo **eip,
int islocked,
u_int32_t locker,
- DB_LOCK *lock
-)
+ DB_LOCK *lock )
{
struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
Entry *ep = NULL;
/* If we weren't given any info, see if we have it already cached */
if ( !*eip ) {
-again: ldap_pvt_thread_rdwr_rlock( &bdb->bi_cache.c_rwlock );
+again: ldap_pvt_thread_rdwr_rlock( &bdb->bi_cache.c_rwlock );
*eip = (EntryInfo *) avl_find( bdb->bi_cache.c_idtree,
- (caddr_t) &ei, bdb_id_cmp );
+ (caddr_t) &ei, bdb_id_cmp );
if ( *eip ) {
/* If the lock attempt fails, the info is in use */
if ( ldap_pvt_thread_mutex_trylock(
rc = bdb_id2entry( op->o_bd, tid, id, &ep );
if ( rc == 0 ) {
rc = bdb_cache_find_ndn( op, tid,
- &ep->e_nname, eip, locker );
- if ( *eip )
- islocked = 1;
+ &ep->e_nname, eip );
+ if ( *eip ) islocked = 1;
if ( rc ) {
bdb_entry_return( ep );
ep = NULL;
}
#else
rc = hdb_cache_find_parent(op, tid, id, eip );
- if ( rc == 0 && *eip )
- islocked = 1;
+ if ( rc == 0 && *eip ) islocked = 1;
#endif
}
if ( (*eip)->bei_state & CACHE_ENTRY_DELETED ) {
rc = DB_NOTFOUND;
} else {
- bdb_cache_entry_db_lock( bdb->bi_dbenv, locker,
- *eip, 0, 0, lock );
+ bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, *eip, 0, 0, lock );
if ( !(*eip)->bei_e ) {
if (!ep) {
rc = bdb_id2entry( op->o_bd, tid, id, &ep );
bdb_cache_children(
Operation *op,
DB_TXN *txn,
- Entry *e
-)
+ Entry *e )
{
int rc;
}
rc = bdb_dn2id_children( op, txn, e );
if ( rc == DB_NOTFOUND ) {
- BEI(e)->bei_state |= CACHE_ENTRY_NO_KIDS;
+ BEI(e)->bei_state |= CACHE_ENTRY_NO_KIDS | CACHE_ENTRY_NO_GRANDKIDS;
}
return rc;
}
EntryInfo *eip,
Entry *e,
struct berval *nrdn,
- u_int32_t locker
-)
+ u_int32_t locker )
{
EntryInfo *new, ei;
struct berval rdn = e->e_name;
rdn.bv_len = ptr - rdn.bv_val;
}
ber_dupbv( &ei.bei_rdn, &rdn );
+ if ( eip->bei_dkids ) eip->bei_dkids++;
#endif
- rc = bdb_entryinfo_add_internal( bdb, &ei, &new, locker );
+
+ rc = bdb_entryinfo_add_internal( bdb, &ei, &new );
+ /* bdb_csn_commit can cause this when adding the database root entry */
+ if ( new->bei_e ) bdb_entry_return( new->bei_e );
new->bei_e = e;
e->e_private = new;
- new->bei_state = CACHE_ENTRY_NO_KIDS;
+ new->bei_state = CACHE_ENTRY_NO_KIDS | CACHE_ENTRY_NO_GRANDKIDS;
eip->bei_state &= ~CACHE_ENTRY_NO_KIDS;
+ if (eip->bei_parent) {
+ eip->bei_parent->bei_state &= ~CACHE_ENTRY_NO_GRANDKIDS;
+ }
/* set lru mutex */
ldap_pvt_thread_mutex_lock( &bdb->bi_cache.lru_mutex );
Attribute *newAttrs,
DB_ENV *env,
u_int32_t locker,
- DB_LOCK *lock
-)
+ DB_LOCK *lock )
{
EntryInfo *ei = BEI(e);
EntryInfo *ein,
DB_ENV *env,
u_int32_t locker,
- DB_LOCK *lock
-)
+ DB_LOCK *lock )
{
EntryInfo *ei = BEI(e), *pei;
struct berval rdn;
attrs_free( e->e_attrs );
}
e->e_attrs = new->e_attrs;
- if( e->e_nname.bv_val < e->e_bv.bv_val || e->e_nname.bv_val >
- e->e_bv.bv_val + e->e_bv.bv_len ) {
+ if( e->e_nname.bv_val < e->e_bv.bv_val ||
+ e->e_nname.bv_val > e->e_bv.bv_val + e->e_bv.bv_len )
+ {
ch_free(e->e_name.bv_val);
ch_free(e->e_nname.bv_val);
}
bdb_cache_entryinfo_lock( ein );
}
#ifdef BDB_HIER
- { int max = ei->bei_modrdns;
- /* Record the generation number of this change */
+ {
+ int max = ei->bei_modrdns;
+ /* Record the generation number of this change */
for ( pei = ein; pei->bei_parent; pei = pei->bei_parent ) {
- if ( pei->bei_modrdns > max )
- max = pei->bei_modrdns;
+ if ( pei->bei_modrdns > max ) max = pei->bei_modrdns;
}
ei->bei_modrdns = max + 1;
}
Entry *e,
DB_ENV *env,
u_int32_t locker,
- DB_LOCK *lock
-)
+ DB_LOCK *lock )
{
EntryInfo *ei = BEI(e);
int rc;
void
bdb_cache_delete_cleanup(
- Entry *e
-)
+ Cache *cache,
+ Entry *e )
{
- bdb_cache_entryinfo_unlock( BEI(e) );
- bdb_cache_entryinfo_destroy( e->e_private );
+ EntryInfo *ei = BEI(e);
+
+ ei->bei_e = NULL;
e->e_private = NULL;
bdb_entry_return( e );
+
+ free( ei->bei_nrdn.bv_val );
+ ei->bei_nrdn.bv_val = NULL;
+#ifdef BDB_HIER
+ free( ei->bei_rdn.bv_val );
+ ei->bei_rdn.bv_val = NULL;
+ ei->bei_modrdns = 0;
+ ei->bei_ckids = 0;
+ ei->bei_dkids = 0;
+#endif
+ ei->bei_parent = NULL;
+ ei->bei_kids = NULL;
+ ei->bei_lruprev = NULL;
+
+ ldap_pvt_thread_rdwr_wlock( &cache->c_rwlock );
+ ei->bei_lrunext = cache->c_eifree;
+ cache->c_eifree = ei;
+ ldap_pvt_thread_rdwr_wunlock( &cache->c_rwlock );
+ bdb_cache_entryinfo_unlock( ei );
}
-
+
static int
bdb_cache_delete_internal(
Cache *cache,
- EntryInfo *e
-)
+ EntryInfo *e )
{
int rc = 0; /* return code */
+#ifdef BDB_HIER
+ e->bei_parent->bei_ckids--;
+ if ( e->bei_parent->bei_dkids ) e->bei_parent->bei_dkids--;
+#endif
/* dn tree */
- if ( avl_delete( &e->bei_parent->bei_kids, (caddr_t) e, bdb_rdn_cmp ) == NULL )
+ if ( avl_delete( &e->bei_parent->bei_kids, (caddr_t) e, bdb_rdn_cmp )
+ == NULL )
{
rc = -1;
}
/* id tree */
- if ( avl_delete( &cache->c_idtree, (caddr_t) e, bdb_id_cmp ) == NULL )
- {
+ if ( avl_delete( &cache->c_idtree, (caddr_t) e, bdb_id_cmp ) == NULL ) {
rc = -1;
}
int lockid = (int) data;
int rc;
-
rc = XLOCK_ID_FREE( env, lockid );
if ( rc == EINVAL ) {
DB_LOCKREQ lr;
return 0;
}
#endif
+
+void
+bdb_cache_delete_entry(
+ struct bdb_info *bdb,
+ EntryInfo *ei,
+ u_int32_t locker,
+ DB_LOCK *lock )
+{
+ ldap_pvt_thread_rdwr_wlock( &bdb->bi_cache.c_rwlock );
+ if ( bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, ei, 1, 1, lock ) == 0 )
+ {
+ if ( ei->bei_e && !(ei->bei_state & CACHE_ENTRY_NOT_LINKED )) {
+ LRU_DELETE( &bdb->bi_cache, ei );
+ ei->bei_e->e_private = NULL;
+ bdb_entry_return( ei->bei_e );
+ ei->bei_e = NULL;
+ --bdb->bi_cache.c_cursize;
+ }
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lock );
+ }
+ ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
+}
projects / openldap / blobdiff