/* back-bdb.h - bdb back-end header file */
/* $OpenLDAP$ */
-/*
- * Copyright 2000-2002 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>.
*/
#ifndef _BACK_BDB_H_
#define _BACK_BDB_H_
#include <portable.h>
-#include <db.h>
-
#include "slap.h"
+#include <db.h>
LDAP_BEGIN_DECL
-#define BDB_IDL_MULTI 1
-/* #define BDB_HIER 1 */
+#define BDB_SUBENTRIES 1
#define DN_BASE_PREFIX SLAP_INDEX_EQUALITY_PREFIX
#define DN_ONE_PREFIX '%'
#define BDB_MAX_ADD_LOOP 30
+#define BDB_ALIASES 1
+
#ifdef BDB_SUBDIRS
-#define BDB_TMP_SUBDIR LDAP_DIRSEP "tmp"
-#define BDB_LG_SUBDIR LDAP_DIRSEP "log"
-#define BDB_DATA_SUBDIR LDAP_DIRSEP "data"
+#define BDB_TMP_SUBDIR "tmp"
+#define BDB_LG_SUBDIR "log"
+#define BDB_DATA_SUBDIR "data"
#endif
#define BDB_SUFFIX ".bdb"
#define BDB_ID2ENTRY 0
-#ifdef BDB_HIER
-#define BDB_ID2PARENT 1
-#else
#define BDB_DN2ID 1
-#endif
#define BDB_NDB 2
/* The bdb on-disk entry format is pretty space-inefficient. Average
* sized user entries are 3-4K each. You need at least two entries to
* fit into a single database page, more is better. 64K is BDB's
- * upper bound. The same issues arise with IDLs in the index databases,
- * but it's nearly impossible to avoid overflows there.
- *
- * When using BDB_IDL_MULTI, the IDL size is no longer an issue. Smaller
- * pages are better for concurrency.
+ * upper bound. Smaller pages are better for concurrency.
*/
#ifndef BDB_ID2ENTRY_PAGESIZE
#define BDB_ID2ENTRY_PAGESIZE 16384
#endif
#ifndef BDB_PAGESIZE
-#ifdef BDB_IDL_MULTI
#define BDB_PAGESIZE 4096 /* BDB's original default */
-#else
-#define BDB_PAGESIZE 16384
-#endif
#endif
#define DEFAULT_CACHE_SIZE 1000
+/* The default search IDL stack cache depth */
+#define DEFAULT_SEARCH_STACK_DEPTH 16
+
+/* The minimum we can function with */
+#define MINIMUM_SEARCH_STACK_DEPTH 8
+
+typedef struct bdb_idl_cache_entry_s {
+ struct berval kstr;
+ ldap_pvt_thread_rdwr_t idl_entry_rwlock;
+ ID *idl;
+ DB *db;
+ struct bdb_idl_cache_entry_s* idl_lru_prev;
+ struct bdb_idl_cache_entry_s* idl_lru_next;
+} bdb_idl_cache_entry_t;
+
+/* BDB backend specific entry info */
+typedef struct bdb_entry_info {
+ struct bdb_entry_info *bei_parent;
+ ID bei_id;
+
+ /* we use the bei_id as a lockobj, but we need to make the size != 4
+ * to avoid conflicting with BDB's internal locks. So add a byte here
+ * that is always zero.
+ */
+ char bei_lockpad;
+
+ short bei_state;
+#define CACHE_ENTRY_DELETED 1
+#define CACHE_ENTRY_NO_KIDS 2
+#define CACHE_ENTRY_NOT_LINKED 4
+#define CACHE_ENTRY_NO_GRANDKIDS 8
+#define CACHE_ENTRY_LOADING 0x10
+
+ /*
+ * remaining fields require backend cache lock to access
+ */
+ struct berval bei_nrdn;
+#ifdef BDB_HIER
+ struct berval bei_rdn;
+ int bei_modrdns; /* track renames */
+ int bei_ckids; /* number of kids cached */
+ int bei_dkids; /* number of kids on-disk, plus 1 */
+#endif
+ Entry *bei_e;
+ Avlnode *bei_kids;
+ ldap_pvt_thread_mutex_t bei_kids_mutex;
+
+ struct bdb_entry_info *bei_lrunext; /* for cache lru list */
+ struct bdb_entry_info *bei_lruprev;
+} EntryInfo;
+#undef BEI
+#define BEI(e) ((EntryInfo *) ((e)->e_private))
+
/* for the in-core cache of entries */
typedef struct bdb_cache {
- int c_maxsize;
- int c_cursize;
- Avlnode *c_dntree;
- Avlnode *c_idtree;
- Entry *c_lruhead; /* lru - add accessed entries here */
- Entry *c_lrutail; /* lru - rem lru entries from here */
- ldap_pvt_thread_rdwr_t c_rwlock;
- ldap_pvt_thread_mutex_t lru_mutex;
+ int c_maxsize;
+ int c_cursize;
+ EntryInfo c_dntree;
+ EntryInfo *c_eifree; /* free list */
+ Avlnode *c_idtree;
+ EntryInfo *c_lruhead; /* lru - add accessed entries here */
+ EntryInfo *c_lrutail; /* lru - rem lru entries from here */
+ ldap_pvt_thread_rdwr_t c_rwlock;
+ ldap_pvt_thread_mutex_t lru_mutex;
+ u_int32_t c_locker; /* used by lru cleaner */
} Cache;
#define CACHE_READ_LOCK 0
slap_mask_t bi_defaultmask;
Cache bi_cache;
Avlnode *bi_attrs;
-#ifdef BDB_HIER
- Avlnode *bi_tree;
- ldap_pvt_thread_rdwr_t bi_tree_rdwr;
- void *bi_troot;
- int bi_nrdns;
-#endif
+ void *bi_search_stack;
+ int bi_search_stack_depth;
int bi_txn_cp;
u_int32_t bi_txn_cp_min;
u_int32_t bi_txn_cp_kbyte;
-#ifndef NO_THREADS
int bi_lock_detect;
- int bi_lock_detect_seconds;
- ldap_pvt_thread_t bi_lock_detect_tid;
-#endif
+ long bi_shm_key;
ID bi_lastid;
ldap_pvt_thread_mutex_t bi_lastid_mutex;
+ LDAP_LIST_HEAD(pl, slap_op) bi_psearch_list;
+ ldap_pvt_thread_rdwr_t bi_pslist_rwlock;
+ LDAP_LIST_HEAD(se, slap_session_entry) bi_session_list;
+ int bi_idl_cache_max_size;
+ int bi_idl_cache_size;
+ Avlnode *bi_idl_tree;
+ bdb_idl_cache_entry_t *bi_idl_lru_head;
+ bdb_idl_cache_entry_t *bi_idl_lru_tail;
+ ldap_pvt_thread_rdwr_t bi_idl_tree_rwlock;
+ ldap_pvt_thread_mutex_t bi_idl_tree_lrulock;
};
#define bi_id2entry bi_databases[BDB_ID2ENTRY]
-#ifdef BDB_HIER
-#define bi_id2parent bi_databases[BDB_ID2PARENT]
-#else
#define bi_dn2id bi_databases[BDB_DN2ID]
-#endif
struct bdb_op_info {
BackendDB* boi_bdb;
DB_TXN* boi_txn;
- int boi_err;
+ DB_LOCK boi_lock; /* used when no txn */
+ u_int32_t boi_err;
+ u_int32_t boi_locker;
+ int boi_acl_cache;
};
#define DB_OPEN(db, file, name, type, flags, mode) \
(db)->open(db, NULL, file, name, type, (flags)|DB_AUTO_COMMIT, mode)
#endif
-#define BDB_REUSE_LOCKERS
-
-#ifdef BDB_REUSE_LOCKERS
-#define LOCK_ID_FREE(env, locker)
-#define LOCK_ID(env, locker) bdb_locker_id(op, env, locker)
-#else
-#define LOCK_ID_FREE(env, locker) XLOCK_ID_FREE(env, locker)
-#define LOCK_ID(env, locker) XLOCK_ID(env, locker)
#endif
-#endif
+#define BDB_REUSE_LOCKERS
+
+#define BDB_CSN_COMMIT 0
+#define BDB_CSN_ABORT 1
+#define BDB_CSN_RETRY 2
LDAP_END_DECL
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