/* 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"
static void bdb_lru_print(Cache *cache);
#endif
+static int bdb_txn_get( Operation *op, DB_ENV *env, DB_TXN **txn );
+
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;
}
if ( !lock ) return 0;
- lockobj.data = ei;
- lockobj.size = sizeof(ei->bei_parent) + sizeof(ei->bei_id);
+ lockobj.data = &ei->bei_id;
+ lockobj.size = sizeof(ei->bei_id) + 1;
list[0].op = DB_LOCK_PUT;
list[0].lock = *lock;
rc = env->lock_vec(env, locker, tryOnly ? DB_LOCK_NOWAIT : 0,
list, 2, NULL );
- if (rc) {
+ if (rc && !tryOnly) {
#ifdef NEW_LOGGING
LDAP_LOG( CACHE, DETAIL1,
"bdb_cache_entry_db_relock: entry %ld, rw %d, rc %d\n",
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;
else
db_rw = DB_LOCK_READ;
- lockobj.data = ei;
- lockobj.size = sizeof(ei->bei_parent) + sizeof(ei->bei_id);
+ lockobj.data = &ei->bei_id;
+ lockobj.size = sizeof(ei->bei_id) + 1;
rc = LOCK_GET(env, locker, tryOnly ? DB_LOCK_NOWAIT : 0,
&lockobj, db_rw, lock);
- if (rc) {
+ if (rc && !tryOnly) {
#ifdef NEW_LOGGING
LDAP_LOG( CACHE, DETAIL1,
"bdb_cache_entry_db_lock: entry %ld, rw %d, rc %d\n",
}
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
} else { \
(cache)->c_lrutail = (ei)->bei_lruprev; \
} \
+ (ei)->bei_lrunext = (ei)->bei_lruprev = NULL; \
} while(0)
#define LRU_ADD( cache, ei ) do { \
{
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
-)
+ 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 );
Operation *op,
DB_TXN *txn,
struct berval *ndn,
- EntryInfo **res
-)
+ EntryInfo **res )
{
struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
EntryInfo ei, *eip, *ei2;
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 = op->o_bd->be_nsuffix[0].bv_len;
+ /* Skip to next rdn if suffix is empty */
+ if ( ei.bei_nrdn.bv_len == 0 ) {
+ for (ptr = ei.bei_nrdn.bv_val - 2; ptr > ndn->bv_val
+ && !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;
+ ei.bei_nrdn.bv_val = ptr;
+ }
+ }
eip = &bdb->bi_cache.c_dntree;
}
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 );
/* 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;
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 ) {
/* If we can successfully writelock it, then
* the object is idle.
*/
- if ( bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, elru, 1, 1,
- &lock ) == 0 ) {
+ if ( bdb_cache_entry_db_lock( bdb->bi_dbenv, bdb->bi_cache.c_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, &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;
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 ) {
-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(
if ( rc == 0 ) {
rc = bdb_cache_find_ndn( op, tid,
&ep->e_nname, eip );
- if ( *eip )
- islocked = 1;
+ 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 );
- 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;
+ int load = 0;
+ /* Make sure only one thread tries to load the entry */
+load1: if ( !(*eip)->bei_e && !((*eip)->bei_state & CACHE_ENTRY_LOADING)) {
+ load = 1;
+ (*eip)->bei_state |= CACHE_ENTRY_LOADING;
+ }
+ if ( islocked ) {
+ bdb_cache_entryinfo_unlock( *eip );
+ islocked = 0;
+ }
+ rc = bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, *eip, 0, 0, lock );
+ if ( (*eip)->bei_state & CACHE_ENTRY_DELETED ) {
+ rc = DB_NOTFOUND;
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lock );
+ } else if ( rc == 0 ) {
+ if ( load ) {
+ DB_TXN *ltid;
+ u_int32_t locker2 = locker;
+
+ /* We don't wrap entire read operations in txn's, but
+ * we need our cache entry lock and any DB page locks
+ * to be associated, in order for deadlock detection
+ * to work properly. So if we need to read from the DB,
+ * we use a long-lived per-thread txn for this step.
+ */
+ if ( !ep && !tid ) {
+ rc = bdb_txn_get( op, bdb->bi_dbenv, <id );
+ if ( ltid )
+ locker2 = TXN_ID( ltid );
} else {
+ ltid = tid;
+ }
+ /* Give up original read lock, obtain write lock with
+ * (possibly) new locker ID.
+ */
+ if ( rc == 0 ) {
+ rc = bdb_cache_entry_db_relock( bdb->bi_dbenv, locker2,
+ *eip, 1, 0, lock );
+ }
+ if ( rc == 0 && !ep) {
+ rc = bdb_id2entry( op->o_bd, ltid, id, &ep );
+ }
+ if ( rc == 0 ) {
ep->e_private = *eip;
#ifdef BDB_HIER
bdb_fix_dn( ep, 0 );
#endif
(*eip)->bei_e = ep;
+ ep = NULL;
}
- 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;
+ (*eip)->bei_state ^= CACHE_ENTRY_LOADING;
+ if ( rc == 0 ) {
+ /* If we succeeded, downgrade back to a readlock. */
+ rc = bdb_cache_entry_db_relock( bdb->bi_dbenv, locker,
+ *eip, 0, 0, lock );
+ } else {
+ /* Otherwise, release the lock. */
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lock );
+ }
+ if ( locker2 != locker ) {
+ /* If we're using the per-thread txn, release all
+ * of its page locks now.
+ */
+ DB_LOCKREQ list;
+ list.op = DB_LOCK_PUT_ALL;
+ list.obj = NULL;
+ bdb->bi_dbenv->lock_vec( bdb->bi_dbenv, locker2,
+ 0, &list, 1, NULL );
+ }
+ } else if ( !(*eip)->bei_e ) {
+ /* Some other thread is trying to load the entry,
+ * give it a chance to finish.
+ */
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lock );
+ ldap_pvt_thread_yield();
+ bdb_cache_entryinfo_lock( *eip );
+ islocked = 1;
+ goto load1;
#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 );
- }
+ } else {
+ /* Check for subtree renames
+ */
+ 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 ( islocked ) {
+ bdb_cache_entryinfo_unlock( *eip );
+ }
+ if ( ep ) {
+ bdb_entry_return( ep );
+ }
if ( rc == 0 ) {
/* set lru mutex */
ldap_pvt_thread_mutex_lock( &bdb->bi_cache.lru_mutex );
- /* if entry is old, remove from old spot on LRU list */
- if ( lru_del ) {
+ /* if entry is on LRU list, remove from old spot */
+ if ( (*eip)->bei_lrunext || (*eip)->bei_lruprev ) {
LRU_DELETE( &bdb->bi_cache, *eip );
} else {
/* if entry is new, bump cache size */
bdb_cache_lru_add( bdb, locker, *eip );
}
- if ( islocked ) {
- bdb_cache_entryinfo_unlock( *eip );
- }
return rc;
}
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;
+ DB_LOCK lock;
int rc;
ei.bei_id = e->e_id;
ei.bei_parent = eip;
ei.bei_nrdn = *nrdn;
+ ei.bei_lockpad = 0;
+
+ /* Lock this entry so that bdb_add can run to completion.
+ * It can only fail if BDB has run out of lock resources.
+ */
+ rc = bdb_cache_entry_db_lock( bdb->bi_dbenv, locker, &ei, 1, 0, &lock );
+ if ( rc ) {
+ bdb_cache_entryinfo_unlock( eip );
+ return rc;
+ }
+
#ifdef BDB_HIER
if ( nrdn->bv_len != e->e_nname.bv_len ) {
char *ptr = strchr( 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 ) {
+ new->bei_e->e_private = NULL;
+ 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);
-
+ int rc;
/* Get write lock on data */
- bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
+ rc = bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
/* If we've done repeated mods on a cached entry, then e_attrs
* is no longer contiguous with the entry, and must be freed.
*/
- if ( (void *)e->e_attrs != (void *)(e+1) ) {
- attrs_free( e->e_attrs );
+ if ( ! rc ) {
+ if ( (void *)e->e_attrs != (void *)(e+1) ) {
+ attrs_free( e->e_attrs );
+ }
+ e->e_attrs = newAttrs;
}
- e->e_attrs = newAttrs;
-
- return 0;
+ return rc;
}
/*
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;
+ int rc;
/* Get write lock on data */
- bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
+ rc = bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
+ if ( rc ) return rc;
/* If we've done repeated mods on a cached entry, then e_attrs
* is no longer contiguous with the entry, and must be freed.
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;
bdb_cache_entryinfo_lock( ei );
/* Get write lock on the data */
- bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
+ rc = bdb_cache_entry_db_relock( env, locker, ei, 1, 0, lock );
+ if ( rc ) {
+ /* couldn't lock, undo and give up */
+ ei->bei_state ^= CACHE_ENTRY_DELETED;
+ bdb_cache_entryinfo_unlock( ei );
+ return rc;
+ }
/* set cache write lock */
ldap_pvt_thread_rdwr_wlock( &cache->c_rwlock );
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 */
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;
}
avl_free( cache->c_dntree.bei_kids, NULL );
avl_free( cache->c_idtree, bdb_entryinfo_release );
+ for (;cache->c_eifree;cache->c_eifree = cache->c_lruhead) {
+ cache->c_lruhead = cache->c_eifree->bei_lrunext;
+ bdb_cache_entryinfo_destroy(cache->c_eifree);
+ }
cache->c_lruhead = NULL;
cache->c_lrutail = NULL;
}
#endif
+static void
+bdb_txn_free( void *key, void *data )
+{
+ DB_TXN *txn = data;
+ TXN_ABORT( txn );
+}
+
+/* Obtain a long-lived transaction for the current thread */
+static int
+bdb_txn_get( Operation *op, DB_ENV *env, DB_TXN **txn )
+{
+ int i, rc, lockid;
+ void *ctx, *data;
+
+ /* If no op was provided, try to find the ctx anyway... */
+ if ( op ) {
+ ctx = op->o_threadctx;
+ } else {
+ ctx = ldap_pvt_thread_pool_context();
+ }
+
+ /* Shouldn't happen unless we're single-threaded */
+ if ( !ctx ) {
+ *txn = NULL;
+ return 0;
+ }
+
+ if ( ldap_pvt_thread_pool_getkey( ctx, ((char *)env)+1, &data, NULL ) ) {
+ for ( i=0, rc=1; rc != 0 && i<4; i++ ) {
+ rc = TXN_BEGIN( env, NULL, txn, 0 );
+ if (rc) ldap_pvt_thread_yield();
+ }
+ if ( rc != 0) {
+ return rc;
+ }
+ if ( ( rc = ldap_pvt_thread_pool_setkey( ctx, ((char *)env)+1,
+ *txn, bdb_txn_free ) ) ) {
+ TXN_ABORT( *txn );
+#ifdef NEW_LOGGING
+ LDAP_LOG( BACK_BDB, ERR, "bdb_txn_get: err %s(%d)\n",
+ db_strerror(rc), rc, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY, "bdb_txn_get: err %s(%d)\n",
+ db_strerror(rc), rc, 0 );
+#endif
+
+ return rc;
+ }
+ } else {
+ *txn = data;
+ }
+ return 0;
+}
+
#ifdef BDB_REUSE_LOCKERS
static void
bdb_locker_id_free( void *key, void *data )
int lockid = (int) data;
int rc;
-
rc = XLOCK_ID_FREE( env, lockid );
if ( rc == EINVAL ) {
DB_LOCKREQ lr;
"bdb_locker_id_free: %d err %s(%d)\n",
lockid, db_strerror(rc), rc );
#endif
- memset( &lr, 0, sizeof(lr) );
-
/* release all locks held by this locker. */
lr.op = DB_LOCK_PUT_ALL;
+ lr.obj = NULL;
env->lock_vec( env, lockid, 0, &lr, 1, NULL );
XLOCK_ID_FREE( env, lockid );
}
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 ( bdb_cache_entry_db_lock( bdb->bi_dbenv, bdb->bi_cache.c_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;
ei->bei_e = NULL;
--bdb->bi_cache.c_cursize;
}
- bdb_cache_entry_db_unlock( bdb->bi_dbenv, &lock );
+ bdb_cache_entry_db_unlock( bdb->bi_dbenv, lock );
}
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_cache.c_rwlock );
}
projects / openldap / blobdiff