/* 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"
#include "back-bdb.h"
-static int bdb_cache_delete_entry_internal(Cache *cache, EntryInfo *e);
+static int bdb_cache_delete_internal(Cache *cache, EntryInfo *e);
#ifdef LDAP_DEBUG
static void bdb_lru_print(Cache *cache);
#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;
}
DBT lockobj;
DB_LOCKREQ list[2];
+ if ( !lock ) return 0;
+
lockobj.data = ei;
lockobj.size = sizeof(ei->bei_parent) + sizeof(ei->bei_id);
if (rc) {
#ifdef NEW_LOGGING
LDAP_LOG( CACHE, DETAIL1,
- "bdb_cache_entry_db_relock: entry %d, rw %d, rc %d\n",
+ "bdb_cache_entry_db_relock: entry %ld, rw %d, rc %d\n",
ei->bei_id, rw, rc );
#else
Debug( LDAP_DEBUG_TRACE,
- "bdb_cache_entry_db_relock: entry %d, rw %d, rc %d\n",
+ "bdb_cache_entry_db_relock: entry %ld, rw %d, rc %d\n",
ei->bei_id, rw, rc );
#endif
} else {
return rc;
#endif
}
-int
-bdb_cache_entry_db_lock
-( DB_ENV *env, u_int32_t locker, EntryInfo *ei, int rw, int tryOnly, DB_LOCK *lock )
+
+static int
+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;
DBT lockobj;
int db_rw;
+ if ( !lock ) return 0;
+
if (rw)
db_rw = DB_LOCK_WRITE;
else
if (rc) {
#ifdef NEW_LOGGING
LDAP_LOG( CACHE, DETAIL1,
- "bdb_cache_entry_db_lock: entry %d, rw %d, rc %d\n",
+ "bdb_cache_entry_db_lock: entry %ld, rw %d, rc %d\n",
ei->bei_id, rw, rc );
#else
Debug( LDAP_DEBUG_TRACE,
- "bdb_cache_entry_db_lock: entry %d, rw %d, rc %d\n",
+ "bdb_cache_entry_db_lock: entry %ld, rw %d, rc %d\n",
ei->bei_id, rw, rc );
#endif
}
}
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
{
ldap_pvt_thread_mutex_destroy( &e->bei_kids_mutex );
free( e->bei_nrdn.bv_val );
+#ifdef BDB_HIER
+ free( e->bei_rdn.bv_val );
+#endif
free( e );
return 0;
}
} \
} while(0)
-/* Do a lexical sort on normalized RDNs */
+/* Do a length-ordered sort on normalized RDNs */
static int
bdb_rdn_cmp( const void *v_e1, const void *v_e2 )
{
const EntryInfo *e1 = v_e1, *e2 = v_e2;
- int rc = strncmp( e1->bei_nrdn.bv_val, e2->bei_nrdn.bv_val, e1->bei_nrdn.bv_len );
- if (rc == 0) rc = e1->bei_nrdn.bv_len - e2->bei_nrdn.bv_len;
+ 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 );
+ }
return rc;
}
/* Create an entryinfo in the cache. Caller must release the locks later.
*/
-int
+static int
bdb_entryinfo_add_internal(
struct bdb_info *bdb,
- EntryInfo *eip,
- ID id,
- struct berval *nrdn,
- EntryInfo **res,
- u_int32_t locker
-)
+ EntryInfo *ei,
+ EntryInfo **res )
{
- Cache *cache = &bdb->bi_cache;
- DB_ENV *env = bdb->bi_dbenv;
EntryInfo *ei2 = NULL;
- int incr = 1;
- int addkid = 1;
- int rc;
- DB_LOCK lock;
*res = NULL;
- ldap_pvt_thread_rdwr_wlock( &bdb->bi_cache.c_rwlock );
- bdb_cache_entryinfo_lock( eip );
-
- /* if parent was previously considered a leaf node,
- * it was on the LRU list. Now it's going to have
- * kids, take it off the LRU list.
- */
- ldap_pvt_thread_mutex_lock( &cache->lru_mutex );
- if ( eip->bei_id && !eip->bei_kids ) {
- LRU_DELETE( cache, eip );
- incr = 0;
- }
-
- cache->c_cursize += incr;
+ ei2 = bdb_cache_entryinfo_new( &bdb->bi_cache );
- /* See if we're above the cache size limit */
- if ( cache->c_cursize > cache->c_maxsize ) {
- EntryInfo *elru, *elprev;
- int i = 0;
-
- /* Look for an unused entry to remove */
- for (elru = cache->c_lrutail; elru; elru = elprev, i++ ) {
- elprev = elru->bei_lruprev;
-
- /* Too many probes, not enough idle, give up */
- if (i > 10) break;
+ ldap_pvt_thread_rdwr_wlock( &bdb->bi_cache.c_rwlock );
+ bdb_cache_entryinfo_lock( ei->bei_parent );
- /* If we can successfully writelock it, then
- * the object is idle.
- */
- if ( bdb_cache_entry_db_lock( env, locker, elru, 1, 1,
- &lock ) == 0 ) {
- /* Need to lock parent to delete child */
- if ( ldap_pvt_thread_mutex_trylock(
- &elru->bei_parent->bei_kids_mutex )) {
- bdb_cache_entry_db_unlock( env, &lock );
- continue;
- }
- bdb_cache_delete_entry_internal( cache, elru );
- bdb_cache_entryinfo_unlock( elru->bei_parent );
- elru->bei_e->e_private = NULL;
- bdb_entry_return( elru->bei_e );
- bdb_cache_entry_db_unlock( env, &lock );
- if (ei2) {
- bdb_cache_entryinfo_destroy( elru );
- } else {
- /* re-use this one */
- ch_free(elru->bei_nrdn.bv_val);
- elru->bei_nrdn.bv_val = NULL;
- elru->bei_e = NULL;
- elru->bei_kids = NULL;
- elru->bei_lrunext = NULL;
- elru->bei_lruprev = NULL;
- elru->bei_state = 0;
- ei2 = elru;
- }
- if (cache->c_cursize < cache->c_maxsize)
- break;
- }
- }
- }
- if (!ei2) {
- ei2 = bdb_cache_entryinfo_new();
- }
- ei2->bei_id = id;
- ei2->bei_parent = eip;
+ ei2->bei_id = ei->bei_id;
+ ei2->bei_parent = ei->bei_parent;
+#ifdef BDB_HIER
+ ei2->bei_rdn = ei->bei_rdn;
+#endif
/* Add to cache ID tree */
- if (avl_insert( &cache->c_idtree, ei2, bdb_id_cmp, avl_dup_error )) {
- EntryInfo *ei;
- ei = avl_find( cache->c_idtree, ei2, bdb_id_cmp );
+ if (avl_insert( &bdb->bi_cache.c_idtree, ei2, bdb_id_cmp, avl_dup_error )) {
+ EntryInfo *eix;
+ eix = avl_find( bdb->bi_cache.c_idtree, ei2, bdb_id_cmp );
bdb_cache_entryinfo_destroy( ei2 );
- ei2 = ei;
- addkid = 0;
- cache->c_cursize -= incr;
+ ei2 = eix;
+#ifdef BDB_HIER
+ /* It got freed above because its value was
+ * assigned to ei2.
+ */
+ ei->bei_rdn.bv_val = NULL;
+#endif
} else {
- LRU_ADD( cache, ei2 );
- ber_dupbv( &ei2->bei_nrdn, nrdn );
- }
-
- if ( addkid ) {
- avl_insert( &eip->bei_kids, ei2, bdb_rdn_cmp, avl_dup_error );
- }
-
- ldap_pvt_thread_mutex_unlock( &cache->lru_mutex );
-
-#if 0 /* caller must do these frees */
- ldap_pvt_thread_rdwr_wunlock( &cache->c_rwlock );
- bdb_cache_entryinfo_unlock( eip );
+ 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;
return 0;
* The EntryInfo is locked upon return and must be unlocked by the caller.
*/
int
-bdb_cache_find_entry_ndn2id(
- Backend *be,
+bdb_cache_find_ndn(
+ Operation *op,
DB_TXN *txn,
struct berval *ndn,
- EntryInfo **res,
- u_int32_t locker,
- void *ctx
-)
+ EntryInfo **res )
{
- struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+ struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
EntryInfo ei, *eip, *ei2;
int rc = 0;
char *ptr;
if ( *res ) {
/* we're doing a onelevel search for an RDN */
ei.bei_nrdn.bv_val = ndn->bv_val;
- ei.bei_nrdn.bv_len = dn_rdnlen( be, ndn );
+ ei.bei_nrdn.bv_len = dn_rdnlen( op->o_bd, ndn );
eip = *res;
} else {
/* we're searching a full DN from the root */
- ptr = ndn->bv_val + ndn->bv_len - be->be_nsuffix[0].bv_len;
+ ptr = ndn->bv_val + ndn->bv_len - op->o_bd->be_nsuffix[0].bv_len;
ei.bei_nrdn.bv_val = ptr;
- ei.bei_nrdn.bv_len = be->be_nsuffix[0].bv_len;
+ ei.bei_nrdn.bv_len = op->o_bd->be_nsuffix[0].bv_len;
eip = &bdb->bi_cache.c_dntree;
}
for ( bdb_cache_entryinfo_lock( eip ); eip; ) {
+ ei.bei_parent = eip;
ei2 = (EntryInfo *)avl_find( eip->bei_kids, &ei, bdb_rdn_cmp );
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( be, txn, &ei.bei_nrdn, &ei, ctx );
+ rc = bdb_dn2id( op, txn, &ei.bei_nrdn, &ei );
if (rc) {
bdb_cache_entryinfo_lock( eip );
*res = eip;
/* DN exists but needs to be added to cache */
ei.bei_nrdn.bv_len = len;
- rc = bdb_entryinfo_add_internal( bdb,
- eip, ei.bei_id, &ei.bei_nrdn, &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;
return rc;
}
+#ifdef BDB_HIER
+/* Walk up the tree from a child node, looking for an ID that's already
+ * been linked into the cache.
+ */
+static int
+hdb_cache_find_parent(
+ Operation *op,
+ DB_TXN *txn,
+ ID id,
+ EntryInfo **res )
+{
+ struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
+ EntryInfo ei, eip, *ei2 = NULL, *ein = NULL, *eir = NULL;
+ char ndn[SLAP_LDAPDN_MAXLEN];
+ ID parent;
+ int rc;
+ int addlru = 1;
+
+ ei.bei_id = id;
+ ei.bei_kids = NULL;
+
+ for (;;) {
+ rc = hdb_dn2id_parent( op, txn, &ei, &eip.bei_id );
+ if ( rc ) break;
+
+ /* Save the previous node, if any */
+ ei2 = ein;
+
+ /* Create a new node for the current ID */
+ 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;
+ ein->bei_rdn = ei.bei_rdn;
+
+ /* This node is not fully connected yet */
+ ein->bei_state = CACHE_ENTRY_NOT_LINKED;
+
+ /* Insert this node into the ID tree */
+ ldap_pvt_thread_rdwr_wlock( &bdb->bi_cache.c_rwlock );
+ if ( avl_insert( &bdb->bi_cache.c_idtree, (caddr_t)ein,
+ bdb_id_cmp, avl_dup_error ) ) {
+
+ /* Someone else created this node just before us.
+ * Free our new copy and use the existing one.
+ */
+ bdb_cache_entryinfo_destroy( ein );
+ ein = (EntryInfo *)avl_find( bdb->bi_cache.c_idtree,
+ (caddr_t) &ei, bdb_id_cmp );
+
+ /* Link in any kids we've already processed */
+ if ( ei2 ) {
+ bdb_cache_entryinfo_lock( ein );
+ avl_insert( &ein->bei_kids, (caddr_t)ei2,
+ bdb_rdn_cmp, avl_dup_error );
+ bdb_cache_entryinfo_unlock( ein );
+ }
+
+ if ( !eir ) {
+ addlru = 0;
+ }
+ }
+
+ /* If this is the first time, save this node
+ * to be returned later.
+ */
+ if ( eir == NULL ) eir = ein;
+
+ /* If there was a previous node, link it to this one */
+ if ( ei2 ) ei2->bei_parent = ein;
+
+ /* Look for this node's parent */
+ if ( eip.bei_id ) {
+ ei2 = (EntryInfo *) avl_find( bdb->bi_cache.c_idtree,
+ (caddr_t) &eip, bdb_id_cmp );
+ } else {
+ ei2 = &bdb->bi_cache.c_dntree;
+ }
+ ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
+
+ /* Got the parent, link in and we're done. */
+ if ( ei2 ) {
+ bdb_cache_entryinfo_lock( ei2 );
+ ein->bei_parent = ei2;
+ avl_insert( &ei2->bei_kids, (caddr_t)ein, bdb_rdn_cmp,
+ avl_dup_error);
+ bdb_cache_entryinfo_unlock( ei2 );
+ bdb_cache_entryinfo_lock( eir );
+
+ /* Reset all the state info */
+ for (ein = eir; ein != ei2; ein=ein->bei_parent)
+ ein->bei_state &= ~CACHE_ENTRY_NOT_LINKED;
+ *res = eir;
+ break;
+ }
+ ei.bei_kids = NULL;
+ ei.bei_id = eip.bei_id;
+ avl_insert( &ei.bei_kids, (caddr_t)ein, bdb_rdn_cmp,
+ avl_dup_error );
+ }
+ 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
+ * will be unlocked on return.
+ */
+static void
+bdb_cache_lru_add(
+ struct bdb_info *bdb,
+ u_int32_t locker,
+ EntryInfo *ei )
+{
+ 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 ) {
+ EntryInfo *elru, *elprev;
+ int i = 0;
+
+ /* Look for an unused entry to remove */
+ for (elru = bdb->bi_cache.c_lrutail; elru; elru = elprev, i++ ) {
+ elprev = elru->bei_lruprev;
+
+ /* Too many probes, not enough idle, give up */
+ if (i > 10) break;
+
+ /* If we can successfully writelock it, then
+ * the object is idle.
+ */
+ if ( bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, elru, 1, 1,
+ 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, 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, lockp );
+ --bdb->bi_cache.c_cursize;
+ if (bdb->bi_cache.c_cursize < bdb->bi_cache.c_maxsize)
+ break;
+ }
+ }
+ }
+ LRU_ADD( &bdb->bi_cache, ei );
+ 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_entry_id - find an entry in the cache, given id.
+ * cache_find_id - find an entry in the cache, given id.
* The entry is locked for Read upon return. Call with islocked TRUE if
* the supplied *eip was already locked.
*/
int
-bdb_cache_find_entry_id(
- Backend *be,
+bdb_cache_find_id(
+ Operation *op,
DB_TXN *tid,
ID id,
EntryInfo **eip,
int islocked,
u_int32_t locker,
- DB_LOCK *lock,
- void *ctx
-)
+ DB_LOCK *lock )
{
- struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+ struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
Entry *ep = NULL;
int rc = 0;
EntryInfo ei;
+ int lru_del = 0;
ei.bei_id = id;
/* If we weren't given any info, see if we have it already cached */
if ( !*eip ) {
- 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 ) {
- bdb_cache_entryinfo_lock( *eip );
+ /* If the lock attempt fails, the info is in use */
+ if ( ldap_pvt_thread_mutex_trylock(
+ &(*eip)->bei_kids_mutex )) {
+ ldap_pvt_thread_rdwr_runlock( &bdb->bi_cache.c_rwlock );
+ /* If this node is being deleted, treat
+ * as if the delete has already finished
+ */
+ if ( (*eip)->bei_state & CACHE_ENTRY_DELETED ) {
+ return DB_NOTFOUND;
+ }
+ /* otherwise, wait for the info to free up */
+ ldap_pvt_thread_yield();
+ goto again;
+ }
+ /* If this info isn't hooked up to its parent yet,
+ * unlock and wait for it to be fully initialized
+ */
+ if ( (*eip)->bei_state & CACHE_ENTRY_NOT_LINKED ) {
+ bdb_cache_entryinfo_unlock( *eip );
+ ldap_pvt_thread_rdwr_runlock( &bdb->bi_cache.c_rwlock );
+ ldap_pvt_thread_yield();
+ goto again;
+ }
islocked = 1;
}
ldap_pvt_thread_rdwr_runlock( &bdb->bi_cache.c_rwlock );
/* See if the ID exists in the database; add it to the cache if so */
if ( !*eip ) {
- rc = bdb_id2entry( be, tid, id, &ep );
+#ifndef BDB_HIER
+ rc = bdb_id2entry( op->o_bd, tid, id, &ep );
if ( rc == 0 ) {
- rc = bdb_cache_find_entry_ndn2id( be, tid,
- &ep->e_nname, eip, locker, ctx );
- if ( *eip )
- islocked = 1;
+ rc = bdb_cache_find_ndn( op, tid,
+ &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;
+#endif
}
/* Ok, we found the info, do we have the entry? */
if ( *eip && rc == 0 ) {
if ( (*eip)->bei_state & CACHE_ENTRY_DELETED ) {
rc = DB_NOTFOUND;
- } else if (!(*eip)->bei_e ) {
- if (!ep) {
- rc = bdb_id2entry( be, tid, id, &ep );
- }
- if ( rc == 0 ) {
- bdb_cache_entry_db_lock( bdb->bi_dbenv, locker,
- *eip, 1, 0, lock );
- (*eip)->bei_e = ep;
- ep->e_private = *eip;
- bdb_cache_entry_db_relock( bdb->bi_dbenv, locker,
- *eip, 0, 0, lock );
- }
} 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 );
+ }
+ if ( rc == 0 ) {
+ bdb_cache_entry_db_relock( bdb->bi_dbenv, locker,
+ *eip, 1, 0, lock );
+ /* Make sure no other modifier beat us to it */
+ if ( (*eip)->bei_e ) {
+ bdb_entry_return( ep );
+ ep = NULL;
+ } else {
+ ep->e_private = *eip;
+#ifdef BDB_HIER
+ bdb_fix_dn( ep, 0 );
+#endif
+ (*eip)->bei_e = ep;
+ }
+ bdb_cache_entry_db_relock( bdb->bi_dbenv, locker,
+ *eip, 0, 0, lock );
+ }
+ } else {
+ /* If we had the entry already, this item
+ * is on the LRU list.
+ */
+ lru_del = 1;
+#ifdef BDB_HIER
+ rc = bdb_fix_dn( (*eip)->bei_e, 1 );
+ if ( rc ) {
+ bdb_cache_entry_db_relock( bdb->bi_dbenv,
+ locker, *eip, 1, 0, lock );
+ /* check again in case other modifier did it already */
+ if ( bdb_fix_dn( (*eip)->bei_e, 1 ) )
+ rc = bdb_fix_dn( (*eip)->bei_e, 2 );
+ bdb_cache_entry_db_relock( bdb->bi_dbenv,
+ locker, *eip, 0, 0, lock );
+ }
+#endif
+ }
}
}
- if ( rc == 0 && (*eip)->bei_kids == NULL ) {
+ if ( rc == 0 ) {
/* set lru mutex */
ldap_pvt_thread_mutex_lock( &bdb->bi_cache.lru_mutex );
- LRU_DELETE( &bdb->bi_cache, *eip );
- LRU_ADD( &bdb->bi_cache, *eip );
- ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.lru_mutex );
+ /* if entry is old, remove from old spot on LRU list */
+ if ( lru_del ) {
+ LRU_DELETE( &bdb->bi_cache, *eip );
+ } else {
+ /* if entry is new, bump cache size */
+ bdb->bi_cache.c_cursize++;
+ }
+ /* lru_mutex is unlocked for us */
+ bdb_cache_lru_add( bdb, locker, *eip );
}
if ( islocked ) {
return rc;
}
+int
+bdb_cache_children(
+ Operation *op,
+ DB_TXN *txn,
+ Entry *e )
+{
+ int rc;
+
+ if ( BEI(e)->bei_kids ) {
+ return 0;
+ }
+ if ( BEI(e)->bei_state & CACHE_ENTRY_NO_KIDS ) {
+ return DB_NOTFOUND;
+ }
+ rc = bdb_dn2id_children( op, txn, e );
+ if ( rc == DB_NOTFOUND ) {
+ BEI(e)->bei_state |= CACHE_ENTRY_NO_KIDS | CACHE_ENTRY_NO_GRANDKIDS;
+ }
+ return rc;
+}
+
/* Update the cache after a successful database Add. */
int
bdb_cache_add(
struct bdb_info *bdb,
- EntryInfo *ei,
+ EntryInfo *eip,
Entry *e,
struct berval *nrdn,
- u_int32_t locker
-)
+ u_int32_t locker )
{
- EntryInfo *new;
+ EntryInfo *new, ei;
+ struct berval rdn = e->e_name;
int rc;
- rc = bdb_entryinfo_add_internal( bdb, ei, e->e_id, nrdn, &new, locker );
+ ei.bei_id = e->e_id;
+ ei.bei_parent = eip;
+ ei.bei_nrdn = *nrdn;
+#ifdef BDB_HIER
+ if ( nrdn->bv_len != e->e_nname.bv_len ) {
+ char *ptr = strchr( rdn.bv_val, ',' );
+ 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 );
+ /* 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;
- ei->bei_state &= ~CACHE_ENTRY_NO_KIDS;
- bdb_cache_entryinfo_unlock( ei );
+ 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 );
+ ++bdb->bi_cache.c_cursize;
+ /* lru_mutex is unlocked for us */
+ bdb_cache_lru_add( bdb, locker, new );
+
+ bdb_cache_entryinfo_unlock( eip );
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
return rc;
}
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;
int rc = 0;
/* Get write lock on data */
attrs_free( e->e_attrs );
}
e->e_attrs = new->e_attrs;
-#ifdef BDB_HIER
- ch_free(e->e_name.bv_val);
-#else
- 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);
}
-#endif
e->e_name = new->e_name;
e->e_nname = new->e_nname;
avl_delete( &pei->bei_kids, (caddr_t) ei, bdb_rdn_cmp );
free( ei->bei_nrdn.bv_val );
ber_dupbv( &ei->bei_nrdn, nrdn );
+#ifdef BDB_HIER
+ free( ei->bei_rdn.bv_val );
+
+ rdn = e->e_name;
+ if ( nrdn->bv_len != e->e_nname.bv_len ) {
+ char *ptr = strchr(rdn.bv_val, ',');
+ rdn.bv_len = ptr - rdn.bv_val;
+ }
+ ber_dupbv( &ei->bei_rdn, &rdn );
+#endif
+
if (!ein) {
ein = ei->bei_parent;
} else {
bdb_cache_entryinfo_unlock( pei );
bdb_cache_entryinfo_lock( ein );
}
+#ifdef BDB_HIER
+ {
+ 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;
+ }
+ ei->bei_modrdns = max + 1;
+ }
+#endif
avl_insert( &ein->bei_kids, ei, bdb_rdn_cmp, avl_dup_error );
bdb_cache_entryinfo_unlock( ein );
return rc;
}
/*
- * cache_delete_entry - delete the entry e from the cache.
+ * cache_delete - delete the entry e from the cache.
*
* returns: 0 e was deleted ok
* 1 e was not in the cache
* -1 something bad happened
*/
int
-bdb_cache_delete_entry(
+bdb_cache_delete(
Cache *cache,
Entry *e,
DB_ENV *env,
u_int32_t locker,
- DB_LOCK *lock
-)
+ DB_LOCK *lock )
{
EntryInfo *ei = BEI(e);
int rc;
/* Set this early, warn off any queriers */
ei->bei_state |= CACHE_ENTRY_DELETED;
+ /* Lock the entry's info */
+ bdb_cache_entryinfo_lock( ei );
+
/* Get write lock on the data */
bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
#ifdef NEW_LOGGING
LDAP_LOG( CACHE, ENTRY,
- "bdb_cache_delete_entry: delete %ld.\n", e->e_id, 0, 0 );
+ "bdb_cache_delete: delete %ld.\n", e->e_id, 0, 0 );
#else
- Debug( LDAP_DEBUG_TRACE, "====> bdb_cache_delete_entry( %ld )\n",
+ Debug( LDAP_DEBUG_TRACE, "====> bdb_cache_delete( %ld )\n",
e->e_id, 0, 0 );
#endif
/* set lru mutex */
ldap_pvt_thread_mutex_lock( &cache->lru_mutex );
- rc = bdb_cache_delete_entry_internal( cache, e->e_private );
+ rc = bdb_cache_delete_internal( cache, e->e_private );
/* free lru mutex */
ldap_pvt_thread_mutex_unlock( &cache->lru_mutex );
/* free cache write lock */
ldap_pvt_thread_rdwr_wunlock( &cache->c_rwlock );
bdb_cache_entryinfo_unlock( ei->bei_parent );
- bdb_cache_entryinfo_destroy( ei );
- e->e_private = NULL;
+
+ /* Leave entry info locked */
+
return( rc );
}
+void
+bdb_cache_delete_cleanup(
+ Cache *cache,
+ Entry *e )
+{
+ 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_entry_internal(
+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;
}
- /* If parent has no more kids, put in on LRU list */
- if ( e->bei_parent->bei_kids == NULL ) {
- LRU_ADD( cache, e->bei_parent );
- cache->c_cursize++;
- }
-
/* 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;
}
bdb_entryinfo_release( void *data )
{
EntryInfo *ei = (EntryInfo *)data;
- avl_free( ei->bei_kids, NULL );
+ if ( ei->bei_kids ) {
+ avl_free( ei->bei_kids, NULL );
+ }
if ( ei->bei_e ) {
ei->bei_e->e_private = NULL;
bdb_entry_return( ei->bei_e );
#endif
#ifdef BDB_REUSE_LOCKERS
-void
+static void
bdb_locker_id_free( void *key, void *data )
{
DB_ENV *env = key;
int lockid = (int) data;
+ int rc;
+
+ rc = XLOCK_ID_FREE( env, lockid );
+ if ( rc == EINVAL ) {
+ DB_LOCKREQ lr;
+#ifdef NEW_LOGGING
+ LDAP_LOG( BACK_BDB, ERR,
+ "bdb_locker_id_free: %d err %s(%d)\n",
+ lockid, db_strerror(rc), rc );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_locker_id_free: %d err %s(%d)\n",
+ lockid, db_strerror(rc), rc );
+#endif
+ memset( &lr, 0, sizeof(lr) );
- XLOCK_ID_FREE( env, lockid );
+ /* release all locks held by this locker. */
+ lr.op = DB_LOCK_PUT_ALL;
+ env->lock_vec( env, lockid, 0, &lr, 1, NULL );
+ XLOCK_ID_FREE( env, lockid );
+ }
}
int
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