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[openldap] / servers / slapd / back-ldbm / init.c
1 /* init.c - initialize ldbm backend */
2 /* $OpenLDAP$ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4  *
5  * Copyright 1998-2004 The OpenLDAP Foundation.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted only as authorized by the OpenLDAP
10  * Public License.
11  *
12  * A copy of this license is available in the file LICENSE in the
13  * top-level directory of the distribution or, alternatively, at
14  * <http://www.OpenLDAP.org/license.html>.
15  */
16
17 #include "portable.h"
18
19 #include <stdio.h>
20
21 #include <ac/string.h>
22 #include <ac/socket.h>
23
24 #include "slap.h"
25 #include "back-ldbm.h"
26 #include "external.h"
27
28 #if SLAPD_LDBM == SLAPD_MOD_DYNAMIC
29
30 int init_module(int argc, char *argv[]) {
31     BackendInfo bi;
32
33     memset( &bi, '\0', sizeof(bi) );
34     bi.bi_type = "ldbm";
35     bi.bi_init = ldbm_back_initialize;
36
37     backend_add(&bi);
38     return 0;
39 }
40
41 #endif /* SLAPD_LDBM */
42
43 int
44 ldbm_back_initialize(
45     BackendInfo *bi
46 )
47 {
48         static char *controls[] = {
49                 LDAP_CONTROL_MANAGEDSAIT,
50                 LDAP_CONTROL_VALUESRETURNFILTER,
51                 NULL
52         };
53
54         bi->bi_controls = controls;
55
56         bi->bi_flags |= 
57                 SLAP_BFLAG_INCREMENT |
58 #ifdef LDBM_SUBENTRIES
59                 SLAP_BFLAG_SUBENTRIES |
60 #endif
61                 SLAP_BFLAG_ALIASES |
62                 SLAP_BFLAG_REFERRALS;
63
64         bi->bi_open = ldbm_back_open;
65         bi->bi_config = NULL;
66         bi->bi_close = ldbm_back_close;
67         bi->bi_destroy = ldbm_back_destroy;
68
69         bi->bi_db_init = ldbm_back_db_init;
70         bi->bi_db_config = ldbm_back_db_config;
71         bi->bi_db_open = ldbm_back_db_open;
72         bi->bi_db_close = ldbm_back_db_close;
73         bi->bi_db_destroy = ldbm_back_db_destroy;
74
75         bi->bi_op_bind = ldbm_back_bind;
76         bi->bi_op_unbind = 0;
77         bi->bi_op_search = ldbm_back_search;
78         bi->bi_op_compare = ldbm_back_compare;
79         bi->bi_op_modify = ldbm_back_modify;
80         bi->bi_op_modrdn = ldbm_back_modrdn;
81         bi->bi_op_add = ldbm_back_add;
82         bi->bi_op_delete = ldbm_back_delete;
83         bi->bi_op_abandon = 0;
84
85         bi->bi_extended = ldbm_back_extended;
86
87         bi->bi_entry_release_rw = ldbm_back_entry_release_rw;
88         bi->bi_entry_get_rw = ldbm_back_entry_get;
89         bi->bi_chk_referrals = ldbm_back_referrals;
90         bi->bi_operational = ldbm_back_operational;
91         bi->bi_has_subordinates = ldbm_back_hasSubordinates;
92
93         /*
94          * hooks for slap tools
95          */
96         bi->bi_tool_entry_open = ldbm_tool_entry_open;
97         bi->bi_tool_entry_close = ldbm_tool_entry_close;
98         bi->bi_tool_entry_first = ldbm_tool_entry_first;
99         bi->bi_tool_entry_next = ldbm_tool_entry_next;
100         bi->bi_tool_entry_get = ldbm_tool_entry_get;
101         bi->bi_tool_entry_put = ldbm_tool_entry_put;
102         bi->bi_tool_entry_reindex = ldbm_tool_entry_reindex;
103         bi->bi_tool_sync = ldbm_tool_sync;
104
105         bi->bi_tool_dn2id_get = 0;
106         bi->bi_tool_id2entry_get = 0;
107         bi->bi_tool_entry_modify = 0;
108
109         bi->bi_connection_init = 0;
110         bi->bi_connection_destroy = 0;
111
112         return 0;
113 }
114
115 int
116 ldbm_back_destroy(
117     BackendInfo *bi
118 )
119 {
120         return 0;
121 }
122
123 int
124 ldbm_back_open(
125     BackendInfo *bi
126 )
127 {
128         int rc;
129
130         /* initialize the underlying database system */
131         rc = ldbm_initialize( NULL );
132         return rc;
133 }
134
135 int
136 ldbm_back_close(
137     BackendInfo *bi
138 )
139 {
140         /* terminate the underlying database system */
141         ldbm_shutdown();
142         return 0;
143 }
144
145 int
146 ldbm_back_db_init(
147     Backend     *be
148 )
149 {
150         struct ldbminfo *li;
151
152         /* allocate backend-database-specific stuff */
153         li = (struct ldbminfo *) ch_calloc( 1, sizeof(struct ldbminfo) );
154
155         /* arrange to read nextid later (on first request for it) */
156         li->li_nextid = NOID;
157
158         /* default cache size */
159         li->li_cache.c_maxsize = DEFAULT_CACHE_SIZE;
160
161         /* default database cache size */
162         li->li_dbcachesize = DEFAULT_DBCACHE_SIZE;
163
164         /* default db mode is with locking */ 
165         li->li_dblocking = 1;
166
167         /* default db mode is with write synchronization */ 
168         li->li_dbwritesync = 1;
169
170         /* default file creation mode */
171         li->li_mode = SLAPD_DEFAULT_DB_MODE;
172
173         /* default database directory */
174         li->li_directory = ch_strdup( SLAPD_DEFAULT_DB_DIR );
175
176         /* DB_ENV environment pointer for DB3 */
177         li->li_dbenv = 0;
178
179         /* envdirok is turned on by ldbm_initialize_env if DB3 */
180         li->li_envdirok = 0;
181
182         /* syncfreq is 0 if disabled, or # seconds */
183         li->li_dbsyncfreq = 0;
184
185         /* wait up to dbsyncwaitn times if server is busy */
186         li->li_dbsyncwaitn = 12;
187
188         /* delay interval */
189         li->li_dbsyncwaitinterval = 5;
190
191         /* flag to notify ldbm_cache_sync_daemon to shut down */
192         li->li_dbshutdown = 0;
193
194         /* initialize various mutex locks & condition variables */
195         ldap_pvt_thread_rdwr_init( &li->li_giant_rwlock );
196         ldap_pvt_thread_mutex_init( &li->li_cache.c_mutex );
197         ldap_pvt_thread_mutex_init( &li->li_dbcache_mutex );
198         ldap_pvt_thread_cond_init( &li->li_dbcache_cv );
199
200         be->be_private = li;
201
202         return 0;
203 }
204
205 int
206 ldbm_back_db_open(
207     BackendDB   *be
208 )
209 {
210         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
211         li->li_dbenv = ldbm_initialize_env( li->li_directory,
212                 li->li_dbcachesize, &li->li_envdirok );
213
214         /* sync thread */
215         if ( li->li_dbsyncfreq > 0 )
216         {
217                 int rc;
218                 rc = ldap_pvt_thread_create( &li->li_dbsynctid,
219                         0, ldbm_cache_sync_daemon, (void*)be );
220
221                 if ( rc != 0 )
222                 {
223                         Debug(  LDAP_DEBUG_ANY,
224                                 "sync ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
225                         return 1;
226                 }
227         }
228
229         return 0;
230 }
231
232 int
233 ldbm_back_db_destroy(
234     BackendDB   *be
235 )
236 {
237         /* should free/destroy every in be_private */
238         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
239
240         if (li->li_dbenv)
241             ldbm_shutdown_env(li->li_dbenv);
242
243         free( li->li_directory );
244         attr_index_destroy( li->li_attrs );
245
246         ldap_pvt_thread_rdwr_destroy( &li->li_giant_rwlock );
247         ldap_pvt_thread_mutex_destroy( &li->li_cache.c_mutex );
248         ldap_pvt_thread_mutex_destroy( &li->li_dbcache_mutex );
249         ldap_pvt_thread_cond_destroy( &li->li_dbcache_cv );
250
251         free( be->be_private );
252         be->be_private = NULL;
253
254         return 0;
255 }