-/* back-bdb.h - ldap ldbm back-end header file */
+/* back-bdb.h - bdb back-end header file */
/* $OpenLDAP$ */
/*
- * Copyright 2000 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 2000-2003 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#define _BACK_BDB_H_
#include <portable.h>
-#include <db.h>
-
#include "slap.h"
+#include <db.h>
LDAP_BEGIN_DECL
-#define BDB_IDL_SIZE (1<<16)
-#define BDB_IDL_MAX (BDB_IDL_SIZE-16)
-#define BDB_IDL_ALLOC (BDB_IDL_MAX * sizeof(ID))
-
-#define BDB_IS_ALLIDS(ids) ((ids)[0] == NOID)
+#define BDB_SUBENTRIES 1
#define DN_BASE_PREFIX SLAP_INDEX_EQUALITY_PREFIX
#define DN_ONE_PREFIX '%'
#define bv2DBT(bv,t) ((t)->data = (bv)->bv_val, \
(t)->size = (bv)->bv_len )
-#define DEFAULT_MODE 0600
+#define BDB_TXN_RETRIES 16
+
+#define BDB_MAX_ADD_LOOP 30
-#define BDB_DBENV_HOME LDAP_RUNDIR LDAP_DIRSEP "openldap-bdb"
+#define BDB_ALIASES 1
-#define BDB_TMP_SUBDIR LDAP_DIRSEP "tmp"
-#define BDB_LG_SUBDIR LDAP_DIRSEP "log"
-#define BDB_DATA_SUBDIR LDAP_DIRSEP "data"
+#ifdef BDB_SUBDIRS
+#define BDB_TMP_SUBDIR "tmp"
+#define BDB_LG_SUBDIR "log"
+#define BDB_DATA_SUBDIR "data"
+#endif
-#define BDB_NEXTID 0
+#define BDB_SUFFIX ".bdb"
+#define BDB_ID2ENTRY 0
#define BDB_DN2ID 1
-#define BDB_ID2ENTRY 2
-#define BDB_INDICES 3
+#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. Smaller pages are better for concurrency.
+ */
+#ifndef BDB_ID2ENTRY_PAGESIZE
+#define BDB_ID2ENTRY_PAGESIZE 16384
+#endif
+
+#ifndef BDB_PAGESIZE
+#define BDB_PAGESIZE 4096 /* BDB's original default */
+#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
+
+/* for the IDL cache */
+#define SLAP_IDL_CACHE 1
+
+#ifdef SLAP_IDL_CACHE
+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;
+#endif
+
+/* BDB backend specific entry info */
+typedef struct bdb_entry_info {
+ struct bdb_entry_info *bei_parent;
+ ID bei_id;
+
+ int bei_state;
+#define CACHE_ENTRY_DELETED 1
+#define CACHE_ENTRY_NO_KIDS 2
+#define CACHE_ENTRY_NOT_LINKED 4
+
+ /*
+ * 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;
+ EntryInfo c_dntree;
+ 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;
+} Cache;
+
+#define CACHE_READ_LOCK 0
+#define CACHE_WRITE_LOCK 1
+
+#define BDB_INDICES 128
struct bdb_db_info {
+ char *bdi_name;
DB *bdi_db;
};
int bi_ndatabases;
struct bdb_db_info **bi_databases;
+ int bi_db_opflags; /* db-specific flags */
+
+ slap_mask_t bi_defaultmask;
+ Cache bi_cache;
+ Avlnode *bi_attrs;
+ 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;
+
+ int bi_lock_detect;
+ long bi_shm_key;
+
+ ID bi_lastid;
+ ldap_pvt_thread_mutex_t bi_lastid_mutex;
+ LDAP_LIST_HEAD(pl, slap_op) bi_psearch_list;
+#ifdef SLAP_IDL_CACHE
+ 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;
+#endif
};
-#define bi_nextid bi_databases[BDB_NEXTID]
+
#define bi_id2entry bi_databases[BDB_ID2ENTRY]
#define bi_dn2id bi_databases[BDB_DN2ID]
+struct bdb_op_info {
+ BackendDB* boi_bdb;
+ DB_TXN* boi_txn;
+ 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, txn, file, name, type, flags, mode) \
+ (db)->open(db, file, name, type, flags, mode)
+
+#if DB_VERSION_MAJOR < 4
+#define LOCK_DETECT(env,f,t,a) lock_detect(env, f, t, a)
+#define LOCK_GET(env,i,f,o,m,l) lock_get(env, i, f, o, m, l)
+#define LOCK_PUT(env,l) lock_put(env, l)
+#define TXN_CHECKPOINT(env,k,m,f) txn_checkpoint(env, k, m, f)
+#define TXN_BEGIN(env,p,t,f) txn_begin((env), p, t, f)
+#define TXN_PREPARE(txn,gid) txn_prepare((txn), (gid))
+#define TXN_COMMIT(txn,f) txn_commit((txn), (f))
+#define TXN_ABORT(txn) txn_abort((txn))
+#define TXN_ID(txn) txn_id(txn)
+#define XLOCK_ID(env, locker) lock_id(env, locker)
+#define XLOCK_ID_FREE(env, locker) lock_id_free(env, locker)
+#else
+#define LOCK_DETECT(env,f,t,a) (env)->lock_detect(env, f, t, a)
+#define LOCK_GET(env,i,f,o,m,l) (env)->lock_get(env, i, f, o, m, l)
+#define LOCK_PUT(env,l) (env)->lock_put(env, l)
+#define TXN_CHECKPOINT(env,k,m,f) (env)->txn_checkpoint(env, k, m, f)
+#define TXN_BEGIN(env,p,t,f) (env)->txn_begin((env), p, t, f)
+#define TXN_PREPARE(txn,g) (txn)->prepare((txn), (g))
+#define TXN_COMMIT(txn,f) (txn)->commit((txn), (f))
+#define TXN_ABORT(txn) (txn)->abort((txn))
+#define TXN_ID(txn) (txn)->id(txn)
+#define XLOCK_ID(env, locker) (env)->lock_id(env, locker)
+#define XLOCK_ID_FREE(env, locker) (env)->lock_id_free(env, locker)
+
+/* BDB 4.1.17 adds txn arg to db->open */
+#if DB_VERSION_MINOR > 1 || DB_VERSION_PATCH >= 17
+#undef DB_OPEN
+#define DB_OPEN(db, txn, file, name, type, flags, mode) \
+ (db)->open(db, txn, file, name, type, flags, mode)
+#endif
+
+#endif
+
+#define BDB_REUSE_LOCKERS
+
+#define BDB_CSN_COMMIT 0
+#define BDB_CSN_ABORT 1
+#define BDB_CSN_RETRY 2
+
LDAP_END_DECL
#include "proto-bdb.h"
projects / openldap / blobdiff