1 /* back-bdb.h - bdb back-end header file */
4 * Copyright 2000-2002 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
18 /* #define BDB_HIER 1 */
20 #define DN_BASE_PREFIX SLAP_INDEX_EQUALITY_PREFIX
21 #define DN_ONE_PREFIX '%'
22 #define DN_SUBTREE_PREFIX '@'
24 #define DBTzero(t) (memset((t), 0, sizeof(DBT)))
25 #define DBT2bv(t,bv) ((bv)->bv_val = (t)->data, \
26 (bv)->bv_len = (t)->size)
27 #define bv2DBT(bv,t) ((t)->data = (bv)->bv_val, \
28 (t)->size = (bv)->bv_len )
30 #define BDB_TXN_RETRIES 16
32 #define BDB_MAX_ADD_LOOP 30
35 #define BDB_TMP_SUBDIR LDAP_DIRSEP "tmp"
36 #define BDB_LG_SUBDIR LDAP_DIRSEP "log"
37 #define BDB_DATA_SUBDIR LDAP_DIRSEP "data"
40 #define BDB_SUFFIX ".bdb"
41 #define BDB_ID2ENTRY 0
43 #define BDB_ID2PARENT 1
49 /* The bdb on-disk entry format is pretty space-inefficient. Average
50 * sized user entries are 3-4K each. You need at least two entries to
51 * fit into a single database page, more is better. 64K is BDB's
52 * upper bound. Smaller pages are better for concurrency.
54 #ifndef BDB_ID2ENTRY_PAGESIZE
55 #define BDB_ID2ENTRY_PAGESIZE 16384
59 #define BDB_PAGESIZE 4096 /* BDB's original default */
62 #define DEFAULT_CACHE_SIZE 1000
64 /* for the in-core cache of entries */
65 typedef struct bdb_cache {
70 Entry *c_lruhead; /* lru - add accessed entries here */
71 Entry *c_lrutail; /* lru - rem lru entries from here */
72 ldap_pvt_thread_rdwr_t c_rwlock;
73 ldap_pvt_thread_mutex_t lru_mutex;
76 #define CACHE_READ_LOCK 0
77 #define CACHE_WRITE_LOCK 1
79 #define BDB_INDICES 128
89 /* DB_ENV parameters */
90 /* The DB_ENV can be tuned via DB_CONFIG */
92 u_int32_t bi_dbenv_xflags; /* extra flags */
96 struct bdb_db_info **bi_databases;
97 ldap_pvt_thread_mutex_t bi_database_mutex;
98 int bi_db_opflags; /* db-specific flags */
100 slap_mask_t bi_defaultmask;
105 ldap_pvt_thread_rdwr_t bi_tree_rdwr;
111 u_int32_t bi_txn_cp_min;
112 u_int32_t bi_txn_cp_kbyte;
116 int bi_lock_detect_seconds;
117 ldap_pvt_thread_t bi_lock_detect_tid;
121 ldap_pvt_thread_mutex_t bi_lastid_mutex;
124 #define bi_id2entry bi_databases[BDB_ID2ENTRY]
126 #define bi_id2parent bi_databases[BDB_ID2PARENT]
128 #define bi_dn2id bi_databases[BDB_DN2ID]
137 #define DB_OPEN(db, file, name, type, flags, mode) \
138 (db)->open(db, file, name, type, flags, mode)
140 #if DB_VERSION_MAJOR < 4
141 #define LOCK_DETECT(env,f,t,a) lock_detect(env, f, t, a)
142 #define LOCK_GET(env,i,f,o,m,l) lock_get(env, i, f, o, m, l)
143 #define LOCK_PUT(env,l) lock_put(env, l)
144 #define TXN_CHECKPOINT(env,k,m,f) txn_checkpoint(env, k, m, f)
145 #define TXN_BEGIN(env,p,t,f) txn_begin((env), p, t, f)
146 #define TXN_PREPARE(txn,gid) txn_prepare((txn), (gid))
147 #define TXN_COMMIT(txn,f) txn_commit((txn), (f))
148 #define TXN_ABORT(txn) txn_abort((txn))
149 #define TXN_ID(txn) txn_id(txn)
150 #define XLOCK_ID(env, locker) lock_id(env, locker)
151 #define XLOCK_ID_FREE(env, locker) lock_id_free(env, locker)
153 #define LOCK_DETECT(env,f,t,a) (env)->lock_detect(env, f, t, a)
154 #define LOCK_GET(env,i,f,o,m,l) (env)->lock_get(env, i, f, o, m, l)
155 #define LOCK_PUT(env,l) (env)->lock_put(env, l)
156 #define TXN_CHECKPOINT(env,k,m,f) (env)->txn_checkpoint(env, k, m, f)
157 #define TXN_BEGIN(env,p,t,f) (env)->txn_begin((env), p, t, f)
158 #define TXN_PREPARE(txn,g) (txn)->prepare((txn), (g))
159 #define TXN_COMMIT(txn,f) (txn)->commit((txn), (f))
160 #define TXN_ABORT(txn) (txn)->abort((txn))
161 #define TXN_ID(txn) (txn)->id(txn)
162 #define XLOCK_ID(env, locker) (env)->lock_id(env, locker)
163 #define XLOCK_ID_FREE(env, locker) (env)->lock_id_free(env, locker)
165 /* BDB 4.1.17 adds txn arg to db->open */
166 #if DB_VERSION_MINOR > 1 || DB_VERSION_PATCH >= 17
168 #define DB_OPEN(db, file, name, type, flags, mode) \
169 (db)->open(db, NULL, file, name, type, (flags)|DB_AUTO_COMMIT, mode)
172 #define BDB_REUSE_LOCKERS
174 #ifdef BDB_REUSE_LOCKERS
175 #define LOCK_ID_FREE(env, locker)
176 #define LOCK_ID(env, locker) bdb_locker_id(op, env, locker)
178 #define LOCK_ID_FREE(env, locker) XLOCK_ID_FREE(env, locker)
179 #define LOCK_ID(env, locker) XLOCK_ID(env, locker)
186 #include "proto-bdb.h"
188 #endif /* _BACK_BDB_H_ */