/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
- * Copyright 2000-2007 The OpenLDAP Foundation.
+ * Copyright 2000-2008 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#ifdef BDB_HIER
#define bdb_cache_lru_purge hdb_cache_lru_purge
#endif
-static void bdb_cache_lru_purge( struct bdb_info *bdb, uint32_t locker );
+static void bdb_cache_lru_purge( struct bdb_info *bdb );
static int bdb_cache_delete_internal(Cache *cache, EntryInfo *e, int decr);
#ifdef LDAP_DEBUG
+#define SLAPD_UNUSED
#ifdef SLAPD_UNUSED
static void bdb_lru_print(Cache *cache);
#endif
if ( cache->c_eifree ) {
ei = cache->c_eifree;
cache->c_eifree = ei->bei_lrunext;
+ ei->bei_finders = 0;
}
ldap_pvt_thread_mutex_unlock( &cache->c_eifree_mutex );
}
return ei;
}
+static void
+bdb_cache_entryinfo_free( Cache *cache, EntryInfo *ei )
+{
+ 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_mutex_lock( &cache->c_eifree_mutex );
+ ei->bei_lrunext = cache->c_eifree;
+ cache->c_eifree = ei;
+ ldap_pvt_thread_mutex_unlock( &cache->c_eifree_mutex );
+}
+
+#define LRU_DEL( c, e ) do { \
+ if ( e == (c)->c_lruhead ) (c)->c_lruhead = e->bei_lruprev; \
+ if ( e == (c)->c_lrutail ) (c)->c_lrutail = e->bei_lruprev; \
+ e->bei_lrunext->bei_lruprev = e->bei_lruprev; \
+ e->bei_lruprev->bei_lrunext = e->bei_lrunext; \
+ e->bei_lruprev = NULL; \
+} while ( 0 )
+
/* Note - we now use a Second-Chance / Clock algorithm instead of
* Least-Recently-Used. This tremendously improves concurrency
* because we no longer need to manipulate the lists every time an
* during a purge operation.
*/
static void
-bdb_cache_lru_link( Cache *cache, EntryInfo *ei )
+bdb_cache_lru_link( struct bdb_info *bdb, EntryInfo *ei )
{
+
+ /* Already linked, ignore */
+ if ( ei->bei_lruprev )
+ return;
+
/* Insert into circular LRU list */
- ldap_pvt_thread_mutex_lock( &cache->lru_tail_mutex );
- ei->bei_lruprev = cache->c_lrutail;
- if ( cache->c_lrutail ) {
- ei->bei_lrunext = cache->c_lrutail->bei_lrunext;
- cache->c_lrutail->bei_lrunext = ei;
+ ldap_pvt_thread_mutex_lock( &bdb->bi_cache.c_lru_mutex );
+
+ ei->bei_lruprev = bdb->bi_cache.c_lrutail;
+ if ( bdb->bi_cache.c_lrutail ) {
+ ei->bei_lrunext = bdb->bi_cache.c_lrutail->bei_lrunext;
+ bdb->bi_cache.c_lrutail->bei_lrunext = ei;
if ( ei->bei_lrunext )
ei->bei_lrunext->bei_lruprev = ei;
} else {
ei->bei_lrunext = ei->bei_lruprev = ei;
- cache->c_lruhead = ei;
+ bdb->bi_cache.c_lruhead = ei;
}
- cache->c_lrutail = ei;
- ldap_pvt_thread_mutex_unlock( &cache->lru_tail_mutex );
+ bdb->bi_cache.c_lrutail = ei;
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_lru_mutex );
}
#ifdef NO_THREADS
int
bdb_cache_entry_db_relock(
struct bdb_info *bdb,
- u_int32_t locker,
+ BDB_LOCKER locker,
EntryInfo *ei,
int rw,
int tryOnly,
list[1].lock = *lock;
list[1].mode = rw ? DB_LOCK_WRITE : DB_LOCK_READ;
list[1].obj = &lockobj;
- rc = bdb->bi_dbenv->lock_vec(bdb->bi_dbenv, locker, tryOnly ? DB_LOCK_NOWAIT : 0,
+ rc = bdb->bi_dbenv->lock_vec(bdb->bi_dbenv, BDB_LOCKID(locker), tryOnly ? DB_LOCK_NOWAIT : 0,
list, 2, NULL );
if (rc && !tryOnly) {
}
static int
-bdb_cache_entry_db_lock( struct bdb_info *bdb, u_int32_t locker, EntryInfo *ei,
+bdb_cache_entry_db_lock( struct bdb_info *bdb, BDB_LOCKER locker, EntryInfo *ei,
int rw, int tryOnly, DB_LOCK *lock )
{
#ifdef NO_DB_LOCK
lockobj.data = &ei->bei_id;
lockobj.size = sizeof(ei->bei_id) + 1;
- rc = LOCK_GET(bdb->bi_dbenv, locker, tryOnly ? DB_LOCK_NOWAIT : 0,
+ rc = LOCK_GET(bdb->bi_dbenv, BDB_LOCKID(locker), tryOnly ? DB_LOCK_NOWAIT : 0,
&lockobj, db_rw, lock);
if (rc && !tryOnly) {
Debug( LDAP_DEBUG_TRACE,
#endif
}
+void
+bdb_cache_return_entry_rw( struct bdb_info *bdb, Entry *e,
+ int rw, DB_LOCK *lock )
+{
+ EntryInfo *ei;
+ int free = 0;
+
+ ei = e->e_private;
+ if ( ei &&
+ ( ei->bei_state & CACHE_ENTRY_NOT_CACHED ) &&
+ ( bdb_cache_entryinfo_trylock( ei ) == 0 )) {
+ if ( ei->bei_state & CACHE_ENTRY_NOT_CACHED ) {
+ /* Releasing the entry can only be done when
+ * we know that nobody else is using it, i.e we
+ * should have an entry_db writelock. But the
+ * flag is only set by the thread that loads the
+ * entry, and only if no other threads has found
+ * it while it was working. All other threads
+ * clear the flag, which mean that we should be
+ * the only thread using the entry if the flag
+ * is set here.
+ */
+ ei->bei_e = NULL;
+ ei->bei_state ^= CACHE_ENTRY_NOT_CACHED;
+ free = 1;
+ }
+ bdb_cache_entryinfo_unlock( ei );
+ }
+ bdb_cache_entry_db_unlock( bdb, lock );
+ if ( free ) {
+ e->e_private = NULL;
+ bdb_entry_return( e );
+ }
+}
+
static int
bdb_cache_entryinfo_destroy( EntryInfo *e )
{
return e1->bei_id - e2->bei_id;
}
+static int
+bdb_id_dup_err( void *v1, void *v2 )
+{
+ EntryInfo *e2 = v2;
+ e2->bei_lrunext = v1;
+ return -1;
+}
+
/* Create an entryinfo in the cache. Caller must release the locks later.
*/
static int
#endif
/* Add to cache ID tree */
- 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 );
+ if (avl_insert( &bdb->bi_cache.c_idtree, ei2, bdb_id_cmp,
+ bdb_id_dup_err )) {
+ EntryInfo *eix = ei2->bei_lrunext;
+ bdb_cache_entryinfo_free( &bdb->bi_cache, ei2 );
ei2 = eix;
#ifdef BDB_HIER
/* It got freed above because its value was
ei->bei_rdn.bv_val = NULL;
#endif
} else {
+ int rc;
+
bdb->bi_cache.c_eiused++;
ber_dupbv( &ei2->bei_nrdn, &ei->bei_nrdn );
*/
if ( ei->bei_parent->bei_kids || !ei->bei_parent->bei_id )
bdb->bi_cache.c_leaves++;
- avl_insert( &ei->bei_parent->bei_kids, ei2, bdb_rdn_cmp,
+ rc = avl_insert( &ei->bei_parent->bei_kids, ei2, bdb_rdn_cmp,
avl_dup_error );
+ if ( rc ) {
+ /* This should never happen; entry cache is corrupt */
+ bdb->bi_dbenv->log_flush( bdb->bi_dbenv, NULL );
+ assert( !rc );
+ }
#ifdef BDB_HIER
ei->bei_parent->bei_ckids++;
#endif
}
- bdb_cache_lru_link( &bdb->bi_cache, ei2 );
*res = ei2;
return 0;
int
bdb_cache_find_ndn(
Operation *op,
- DB_TXN *txn,
+ BDB_LOCKER locker,
struct berval *ndn,
EntryInfo **res )
{
ei.bei_parent = eip;
ei2 = (EntryInfo *)avl_find( eip->bei_kids, &ei, bdb_rdn_cmp );
if ( !ei2 ) {
+ DB_LOCK lock;
int len = ei.bei_nrdn.bv_len;
if ( BER_BVISEMPTY( ndn )) {
(ei.bei_nrdn.bv_val - ndn->bv_val);
bdb_cache_entryinfo_unlock( eip );
- rc = bdb_dn2id( op, txn, &ei.bei_nrdn, &ei );
+ BDB_LOG_PRINTF( bdb->bi_dbenv, NULL, "slapd Reading %s",
+ ei.bei_nrdn.bv_val );
+
+ lock.mode = DB_LOCK_NG;
+ rc = bdb_dn2id( op, &ei.bei_nrdn, &ei, locker, &lock );
if (rc) {
bdb_cache_entryinfo_lock( eip );
+ bdb_cache_entry_db_unlock( bdb, &lock );
*res = eip;
return rc;
}
+ BDB_LOG_PRINTF( bdb->bi_dbenv, NULL, "slapd Read got %s(%d)",
+ ei.bei_nrdn.bv_val, ei.bei_id );
+
/* DN exists but needs to be added to cache */
ei.bei_nrdn.bv_len = len;
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 );
+ bdb_cache_entry_db_unlock( bdb, &lock );
if ( rc ) {
*res = eip;
return rc;
int
hdb_cache_find_parent(
Operation *op,
- DB_TXN *txn,
- u_int32_t locker,
+ BDB_LOCKER locker,
ID id,
EntryInfo **res )
{
ei.bei_ckids = 0;
for (;;) {
- rc = hdb_dn2id_parent( op, txn, locker, &ei, &eip.bei_id );
+ rc = hdb_dn2id_parent( op, locker, &ei, &eip.bei_id );
if ( rc ) break;
/* Save the previous node, if any */
/* 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 ) ) {
+ bdb_id_cmp, bdb_id_dup_err ) ) {
+ EntryInfo *eix = ein->bei_lrunext;
/* 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 );
+ bdb_cache_entryinfo_free( &bdb->bi_cache, ein );
+ ein = eix;
/* Link in any kids we've already processed */
if ( ei2 ) {
ein->bei_ckids++;
bdb_cache_entryinfo_unlock( ein );
}
- } else {
- bdb_cache_lru_link( &bdb->bi_cache, ein );
}
/* If this is the first time, save this node
/* Got the parent, link in and we're done. */
if ( ei2 ) {
+ bdb_cache_entryinfo_lock( eir );
bdb_cache_entryinfo_lock( ei2 );
ein->bei_parent = ei2;
ein->bei_state &= ~CACHE_ENTRY_NOT_LINKED;
bdb_cache_entryinfo_unlock( ei2 );
- bdb_cache_entryinfo_lock( eir );
*res = eir;
break;
}
#endif
+/* This is best-effort only. If all entries in the cache are
+ * busy, they will all be kept. This is unlikely to happen
+ * unless the cache is very much smaller than the working set.
+ */
static void
-bdb_cache_lru_purge( struct bdb_info *bdb, uint32_t locker )
+bdb_cache_lru_purge( struct bdb_info *bdb )
{
- DB_LOCK lock;
- EntryInfo *elru, *elnext;
- int count, islocked;
+ DB_LOCK lock, *lockp;
+ EntryInfo *elru, *elnext = NULL;
+ int count, islocked, eimax;
- /* Don't bother if we can't get the lock */
- if ( ldap_pvt_thread_mutex_trylock( &bdb->bi_cache.lru_head_mutex ) )
- return;
+ /* Wait for the mutex; we're the only one trying to purge. */
+ ldap_pvt_thread_mutex_lock( &bdb->bi_cache.c_lru_mutex );
if ( bdb->bi_cache.c_cursize <= bdb->bi_cache.c_maxsize ) {
- ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.lru_head_mutex );
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_lru_mutex );
+ bdb->bi_cache.c_purging = 0;
return;
}
+ if ( bdb->bi_cache.c_locker ) {
+ lockp = &lock;
+ } else {
+ lockp = NULL;
+ }
+
count = 0;
+
+ /* maximum number of EntryInfo leaves to cache. In slapcat
+ * we always free all leaf nodes.
+ */
+ if ( slapMode & SLAP_TOOL_READONLY )
+ eimax = 0;
+ else
+ eimax = bdb->bi_cache.c_eimax;
+
/* Look for an unused entry to remove */
- for (elru = bdb->bi_cache.c_lruhead; elru; elru = elnext ) {
+ for ( elru = bdb->bi_cache.c_lruhead; elru; elru = elnext ) {
elnext = elru->bei_lrunext;
- if ( ldap_pvt_thread_mutex_trylock( &elru->bei_kids_mutex ))
- continue;
+ if ( bdb_cache_entryinfo_trylock( elru ))
+ goto bottom;
/* This flag implements the clock replacement behavior */
if ( elru->bei_state & ( CACHE_ENTRY_REFERENCED )) {
elru->bei_state &= ~CACHE_ENTRY_REFERENCED;
bdb_cache_entryinfo_unlock( elru );
- continue;
+ goto bottom;
}
/* If this node is in the process of linking into the cache,
* or this node is being deleted, skip it.
- *
- * Also, if this node has no entry attached, skip it, there's
- * nothing to purge anyway.
*/
if (( elru->bei_state & ( CACHE_ENTRY_NOT_LINKED |
CACHE_ENTRY_DELETED | CACHE_ENTRY_LOADING )) ||
- !elru->bei_e ) {
+ elru->bei_finders > 0 ) {
bdb_cache_entryinfo_unlock( elru );
- continue;
+ goto bottom;
}
/* entryinfo is locked */
/* If we can successfully writelock it, then
* the object is idle.
*/
- if ( bdb_cache_entry_db_lock( bdb, locker, elru, 1, 1, &lock ) == 0 ) {
+ if ( bdb_cache_entry_db_lock( bdb,
+ bdb->bi_cache.c_locker, elru, 1, 1, lockp ) == 0 ) {
/* Free entry for this node if it's present */
if ( elru->bei_e ) {
elru->bei_e = NULL;
count++;
}
- bdb_cache_entry_db_unlock( bdb, &lock );
+ bdb_cache_entry_db_unlock( bdb, lockp );
- /* ITS#4010 if we're in slapcat, and this node is a leaf
- * node, free it.
- *
- * FIXME: we need to do this for slapd as well, (which is
- * why we compute bi_cache.c_leaves now) but at the moment
- * we can't because it causes unresolvable deadlocks.
+ /*
+ * If it is a leaf node, and we're over the limit, free it.
*/
- if ( slapMode & SLAP_TOOL_READONLY ) {
- if ( !elru->bei_kids ) {
- bdb_cache_delete_internal( &bdb->bi_cache, elru, 0 );
- bdb_cache_delete_cleanup( &bdb->bi_cache, elru );
- islocked = 0;
- }
- /* Leave node on LRU list for a future pass */
- }
+ if ( elru->bei_kids ) {
+ /* Drop from list, we ignore it... */
+ LRU_DEL( &bdb->bi_cache, elru );
+ } else if ( bdb->bi_cache.c_leaves > eimax ) {
+ /* Too many leaf nodes, free this one */
+ bdb_cache_delete_internal( &bdb->bi_cache, elru, 0 );
+ bdb_cache_delete_cleanup( &bdb->bi_cache, elru );
+ islocked = 0;
+ } /* Leave on list until we need to free it */
}
if ( islocked )
ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_count_mutex );
break;
}
+bottom:
+ if ( elnext == bdb->bi_cache.c_lruhead )
+ break;
}
bdb->bi_cache.c_lruhead = elnext;
- ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.lru_head_mutex );
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_lru_mutex );
+ bdb->bi_cache.c_purging = 0;
}
EntryInfo *
/*
* 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 entry is locked for Read upon return. Call with flag ID_LOCKED if
* the supplied *eip was already locked.
*/
DB_TXN *tid,
ID id,
EntryInfo **eip,
- int islocked,
- u_int32_t locker,
+ int flag,
+ BDB_LOCKER locker,
DB_LOCK *lock )
{
struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
(caddr_t) &ei, bdb_id_cmp );
if ( *eip ) {
/* If the lock attempt fails, the info is in use */
- if ( ldap_pvt_thread_mutex_trylock(
- &(*eip)->bei_kids_mutex )) {
+ if ( bdb_cache_entryinfo_trylock( *eip )) {
ldap_pvt_thread_rdwr_runlock( &bdb->bi_cache.c_rwlock );
/* If this node is being deleted, treat
* as if the delete has already finished
ldap_pvt_thread_yield();
goto again;
}
- islocked = 1;
+ flag |= ID_LOCKED;
}
ldap_pvt_thread_rdwr_runlock( &bdb->bi_cache.c_rwlock );
}
#ifndef BDB_HIER
rc = bdb_id2entry( op->o_bd, tid, locker, id, &ep );
if ( rc == 0 ) {
- rc = bdb_cache_find_ndn( op, tid,
+ rc = bdb_cache_find_ndn( op, locker,
&ep->e_nname, eip );
- if ( *eip ) islocked = 1;
+ if ( *eip ) flag |= ID_LOCKED;
if ( rc ) {
ep->e_private = NULL;
#ifdef SLAP_ZONE_ALLOC
}
}
#else
- rc = hdb_cache_find_parent(op, tid, locker, id, eip );
- if ( rc == 0 ) islocked = 1;
+ rc = hdb_cache_find_parent(op, locker, id, eip );
+ if ( rc == 0 ) flag |= ID_LOCKED;
#endif
}
/* Ok, we found the info, do we have the entry? */
if ( rc == 0 ) {
+ if ( !( flag & ID_LOCKED )) {
+ bdb_cache_entryinfo_lock( *eip );
+ flag |= ID_LOCKED;
+ }
+
if ( (*eip)->bei_state & CACHE_ENTRY_DELETED ) {
rc = DB_NOTFOUND;
} else {
+ (*eip)->bei_finders++;
+ (*eip)->bei_state |= CACHE_ENTRY_REFERENCED;
/* Make sure only one thread tries to load the entry */
load1:
#ifdef SLAP_ZONE_ALLOC
load = 1;
(*eip)->bei_state |= CACHE_ENTRY_LOADING;
}
- if ( islocked ) {
+
+ if ( !load ) {
+ /* Clear the uncached state if we are not
+ * loading it, i.e it is already cached or
+ * another thread is currently loading it.
+ */
+ (*eip)->bei_state &= ~CACHE_ENTRY_NOT_CACHED;
+ flag &= ~ID_NOCACHE;
+ }
+
+ if ( flag & ID_LOCKED ) {
bdb_cache_entryinfo_unlock( *eip );
- islocked = 0;
+ flag ^= ID_LOCKED;
}
rc = bdb_cache_entry_db_lock( bdb, locker, *eip, load, 0, lock );
if ( (*eip)->bei_state & CACHE_ENTRY_DELETED ) {
(*eip)->bei_zseq = *((ber_len_t *)ep - 2);
#endif
ep = NULL;
+ bdb_cache_lru_link( bdb, *eip );
+ if (( flag & ID_NOCACHE ) &&
+ ( bdb_cache_entryinfo_trylock( *eip ) == 0 )) {
+ /* Set the cached state only if no other thread
+ * found the info while we was loading the entry.
+ */
+ if ( (*eip)->bei_finders == 1 )
+ (*eip)->bei_state |= CACHE_ENTRY_NOT_CACHED;
+ bdb_cache_entryinfo_unlock( *eip );
+ }
}
if ( rc == 0 ) {
/* If we succeeded, downgrade back to a readlock. */
/* Otherwise, release the lock. */
bdb_cache_entry_db_unlock( bdb, lock );
}
- bdb_cache_entryinfo_lock( *eip );
- (*eip)->bei_state ^= CACHE_ENTRY_LOADING;
- bdb_cache_entryinfo_unlock( *eip );
} else if ( !(*eip)->bei_e ) {
/* Some other thread is trying to load the entry,
* wait for it to finish.
*/
bdb_cache_entry_db_unlock( bdb, lock );
bdb_cache_entryinfo_lock( *eip );
- islocked = 1;
+ flag |= ID_LOCKED;
goto load1;
#ifdef BDB_HIER
} else {
}
#endif
}
-
+ bdb_cache_entryinfo_lock( *eip );
+ (*eip)->bei_finders--;
+ if ( load )
+ (*eip)->bei_state ^= CACHE_ENTRY_LOADING;
+ bdb_cache_entryinfo_unlock( *eip );
}
}
}
- if ( islocked ) {
+ if ( flag & ID_LOCKED ) {
bdb_cache_entryinfo_unlock( *eip );
}
if ( ep ) {
int purge = 0;
if ( load ) {
- ldap_pvt_thread_mutex_lock( &bdb->bi_cache.c_count_mutex );
- bdb->bi_cache.c_cursize++;
- if ( bdb->bi_cache.c_cursize > bdb->bi_cache.c_maxsize )
- purge = 1;
- ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_count_mutex );
+ if ( !( flag & ID_NOCACHE )) {
+ ldap_pvt_thread_mutex_lock( &bdb->bi_cache.c_count_mutex );
+ bdb->bi_cache.c_cursize++;
+ if ( bdb->bi_cache.c_cursize > bdb->bi_cache.c_maxsize &&
+ !bdb->bi_cache.c_purging ) {
+ purge = 1;
+ bdb->bi_cache.c_purging = 1;
+ }
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_count_mutex );
+ }
}
if ( purge )
- bdb_cache_lru_purge( bdb, locker );
+ bdb_cache_lru_purge( bdb );
}
#ifdef SLAP_ZONE_ALLOC
EntryInfo *eip,
Entry *e,
struct berval *nrdn,
- u_int32_t locker,
+ BDB_LOCKER locker,
DB_LOCK *lock )
{
EntryInfo *new, ei;
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
ldap_pvt_thread_mutex_lock( &bdb->bi_cache.c_count_mutex );
++bdb->bi_cache.c_cursize;
- if ( bdb->bi_cache.c_cursize > bdb->bi_cache.c_maxsize )
+ if ( bdb->bi_cache.c_cursize > bdb->bi_cache.c_maxsize &&
+ !bdb->bi_cache.c_purging ) {
purge = 1;
+ bdb->bi_cache.c_purging = 1;
+ }
ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_count_mutex );
+ bdb_cache_lru_link( bdb, new );
+
if ( purge )
- bdb_cache_lru_purge( bdb, locker );
+ bdb_cache_lru_purge( bdb );
return rc;
}
struct bdb_info *bdb,
Entry *e,
Attribute *newAttrs,
- u_int32_t locker,
+ BDB_LOCKER locker,
DB_LOCK *lock )
{
EntryInfo *ei = BEI(e);
struct berval *nrdn,
Entry *new,
EntryInfo *ein,
- u_int32_t locker,
+ BDB_LOCKER locker,
DB_LOCK *lock )
{
EntryInfo *ei = BEI(e), *pei;
free( ei->bei_nrdn.bv_val );
ber_dupbv( &ei->bei_nrdn, nrdn );
- if ( !pei->bei_kids )
- pei->bei_state |= CACHE_ENTRY_NO_KIDS | CACHE_ENTRY_NO_GRANDKIDS;
-
#ifdef BDB_HIER
free( ei->bei_rdn.bv_val );
rdn.bv_len = ptr - rdn.bv_val;
}
ber_dupbv( &ei->bei_rdn, &rdn );
- pei->bei_ckids--;
- if ( pei->bei_dkids ) pei->bei_dkids--;
+
+ /* If new parent, decrement kid counts */
+ if ( ein ) {
+ pei->bei_ckids--;
+ if ( pei->bei_dkids ) {
+ pei->bei_dkids--;
+ if ( pei->bei_dkids < 2 )
+ pei->bei_state |= CACHE_ENTRY_NO_KIDS | CACHE_ENTRY_NO_GRANDKIDS;
+ }
+ }
#endif
if (!ein) {
ei->bei_parent = ein;
bdb_cache_entryinfo_unlock( pei );
bdb_cache_entryinfo_lock( ein );
- }
- /* parent now has kids */
- if ( ein->bei_state & CACHE_ENTRY_NO_KIDS )
- ein->bei_state ^= CACHE_ENTRY_NO_KIDS;
+ /* new parent now has kids */
+ if ( ein->bei_state & CACHE_ENTRY_NO_KIDS )
+ ein->bei_state ^= CACHE_ENTRY_NO_KIDS;
+ /* grandparent has grandkids */
+ if ( ein->bei_parent )
+ ein->bei_parent->bei_state &= ~CACHE_ENTRY_NO_GRANDKIDS;
#ifdef BDB_HIER
- /* parent might now have grandkids */
- if ( ein->bei_state & CACHE_ENTRY_NO_GRANDKIDS &&
- !(ei->bei_state & (CACHE_ENTRY_NO_KIDS)))
- ein->bei_state ^= CACHE_ENTRY_NO_GRANDKIDS;
+ /* parent might now have grandkids */
+ if ( ein->bei_state & CACHE_ENTRY_NO_GRANDKIDS &&
+ !(ei->bei_state & CACHE_ENTRY_NO_KIDS))
+ ein->bei_state ^= CACHE_ENTRY_NO_GRANDKIDS;
- {
- /* Record the generation number of this change */
- ldap_pvt_thread_mutex_lock( &bdb->bi_modrdns_mutex );
- bdb->bi_modrdns++;
- ei->bei_modrdns = bdb->bi_modrdns;
- ldap_pvt_thread_mutex_unlock( &bdb->bi_modrdns_mutex );
+ ein->bei_ckids++;
+ if ( ein->bei_dkids ) ein->bei_dkids++;
+#endif
}
- ein->bei_ckids++;
- if ( ein->bei_dkids ) ein->bei_dkids++;
+
+#ifdef BDB_HIER
+ /* Record the generation number of this change */
+ ldap_pvt_thread_mutex_lock( &bdb->bi_modrdns_mutex );
+ bdb->bi_modrdns++;
+ ei->bei_modrdns = bdb->bi_modrdns;
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_modrdns_mutex );
#endif
+
avl_insert( &ein->bei_kids, ei, bdb_rdn_cmp, avl_dup_error );
bdb_cache_entryinfo_unlock( ein );
return rc;
bdb_cache_delete(
struct bdb_info *bdb,
Entry *e,
- u_int32_t locker,
+ BDB_LOCKER locker,
DB_LOCK *lock )
{
EntryInfo *ei = BEI(e);
e->e_id, 0, 0 );
/* set lru mutex */
- ldap_pvt_thread_mutex_lock( &bdb->bi_cache.lru_head_mutex );
+ ldap_pvt_thread_mutex_lock( &bdb->bi_cache.c_lru_mutex );
rc = bdb_cache_delete_internal( &bdb->bi_cache, e->e_private, 1 );
/* free lru mutex */
- ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.lru_head_mutex );
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_cache.c_lru_mutex );
/* Leave entry info locked */
ei->bei_e = NULL;
}
- 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_mutex_lock( &cache->c_eifree_mutex );
- ei->bei_lrunext = cache->c_eifree;
- cache->c_eifree = ei;
- ldap_pvt_thread_mutex_unlock( &cache->c_eifree_mutex );
+ bdb_cache_entryinfo_free( cache, ei );
bdb_cache_entryinfo_unlock( ei );
}
if ( rc == 0 ){
/* lru */
- if ( e == cache->c_lruhead ) cache->c_lruhead = e->bei_lrunext;
- if ( e == cache->c_lrutail ) {
- ldap_pvt_thread_mutex_lock( &cache->lru_tail_mutex );
- if ( e == cache->c_lrutail ) cache->c_lrutail = e->bei_lruprev;
- ldap_pvt_thread_mutex_unlock( &cache->lru_tail_mutex );
- }
-
- if ( e->bei_lrunext ) e->bei_lrunext->bei_lruprev = e->bei_lruprev;
- if ( e->bei_lruprev ) e->bei_lruprev->bei_lrunext = e->bei_lrunext;
+ LRU_DEL( cache, e );
if ( e->bei_e ) {
ldap_pvt_thread_mutex_lock( &cache->c_count_mutex );
/* set cache write lock */
ldap_pvt_thread_rdwr_wlock( &cache->c_rwlock );
/* set lru mutex */
- ldap_pvt_thread_mutex_lock( &cache->lru_tail_mutex );
+ ldap_pvt_thread_mutex_lock( &cache->c_lru_mutex );
Debug( LDAP_DEBUG_TRACE, "====> bdb_cache_release_all\n", 0, 0, 0 );
cache->c_dntree.bei_kids = NULL;
/* free lru mutex */
- ldap_pvt_thread_mutex_unlock( &cache->lru_tail_mutex );
+ ldap_pvt_thread_mutex_unlock( &cache->c_lru_mutex );
/* free cache write lock */
ldap_pvt_thread_rdwr_wunlock( &cache->c_rwlock );
}
{
EntryInfo *e;
- fprintf( stderr, "LRU circle head: %p\n", cache->c_lruhead );
+ fprintf( stderr, "LRU circle head: %p\n", (void *) cache->c_lruhead );
fprintf( stderr, "LRU circle (tail forward):\n" );
for ( e = cache->c_lrutail; ; ) {
fprintf( stderr, "\t%p, %p id %ld rdn \"%s\"\n",
- e, e->bei_e, e->bei_id, e->bei_nrdn.bv_val );
+ (void *) e, (void *) e->bei_e, e->bei_id, e->bei_nrdn.bv_val );
e = e->bei_lrunext;
if ( e == cache->c_lrutail )
break;
fprintf( stderr, "LRU circle (tail backward):\n" );
for ( e = cache->c_lrutail; ; ) {
fprintf( stderr, "\t%p, %p id %ld rdn \"%s\"\n",
- e, e->bei_e, e->bei_id, e->bei_nrdn.bv_val );
+ (void *) e, (void *) e->bei_e, e->bei_id, e->bei_nrdn.bv_val );
e = e->bei_lruprev;
if ( e == cache->c_lrutail )
break;
bdb_locker_id_free( void *key, void *data )
{
DB_ENV *env = key;
- u_int32_t lockid = (long)data;
+ u_int32_t lockid;
int rc;
+#if DB_VERSION_FULL >= 0x04060012
+ BDB_LOCKER lptr = data;
+ lockid = lptr->id;
+#else
+ lockid = (long)data;
+#endif
rc = XLOCK_ID_FREE( env, lockid );
if ( rc == EINVAL ) {
DB_LOCKREQ lr;
}
}
+/* free up any keys used by the main thread */
+void
+bdb_locker_flush( DB_ENV *env )
+{
+ void *data;
+ void *ctx = ldap_pvt_thread_pool_context();
+
+ if ( !ldap_pvt_thread_pool_getkey( ctx, env, &data, NULL ) ) {
+ ldap_pvt_thread_pool_setkey( ctx, env, NULL, 0, NULL, NULL );
+ bdb_locker_id_free( env, data );
+ }
+}
+
int
-bdb_locker_id( Operation *op, DB_ENV *env, u_int32_t *locker )
+bdb_locker_id( Operation *op, DB_ENV *env, BDB_LOCKER *locker )
{
int i, rc;
u_int32_t lockid;
if ( rc != 0) {
return rc;
}
+#if DB_VERSION_FULL >= 0x04060012
+ { BDB_LOCKER lptr;
+ __lock_getlocker( env->lk_handle, lockid, 0, &lptr );
+ data = lptr;
+ }
+#else
data = (void *)((long)lockid);
+#endif
if ( ( rc = ldap_pvt_thread_pool_setkey( ctx, env,
- data, bdb_locker_id_free ) ) ) {
+ data, bdb_locker_id_free, NULL, NULL ) ) ) {
XLOCK_ID_FREE( env, lockid );
Debug( LDAP_DEBUG_ANY, "bdb_locker_id: err %s(%d)\n",
db_strerror(rc), rc, 0 );
} else {
lockid = (long)data;
}
+#if DB_VERSION_FULL >= 0x04060012
+ *locker = data;
+#else
*locker = lockid;
+#endif
return 0;
}
#endif /* BDB_REUSE_LOCKERS */
projects / openldap / blobdiff