2 * $Id: dbif.c,v 1.4 2008-08-07 07:39:14 didg Exp $
4 * Copyright (C) Joerg Lenneis 2003
5 * All Rights Reserved. See COPYING.
10 #endif /* HAVE_CONFIG_H */
15 #ifdef HAVE_SYS_TYPES_H
16 #include <sys/types.h>
17 #endif /* HAVE_SYS_TYPES_H */
19 #include <sys/types.h>
21 #include <sys/cdefs.h>
23 #include <atalk/logger.h>
28 #define DB_ERRLOGFILE "db_errlog"
31 static DB_ENV *db_env = NULL;
32 static DB_TXN *db_txn = NULL;
33 static FILE *db_errlog = NULL;
35 #ifdef CNID_BACKEND_DBD_TXN
36 #define DBOPTIONS (DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN)
38 #define DBOPTIONS (DB_CREATE | DB_INIT_CDB | DB_INIT_MPOOL | DB_PRIVATE)
41 static struct db_table {
44 u_int32_t general_flags;
48 { "cnid2.db", NULL, 0, DB_BTREE},
49 { "devino.db", NULL, 0, DB_BTREE},
50 { "didname.db", NULL, 0, DB_BTREE},
53 static char *old_dbfiles[] = {"cnid.db", NULL};
55 extern int didname(DB *dbp, const DBT *pkey, const DBT *pdata, DBT *skey);
56 extern int devino(DB *dbp, const DBT *pkey, const DBT *pdata, DBT *skey);
59 static int db_compat_associate (DB *p, DB *s,
60 int (*callback)(DB *, const DBT *,const DBT *, DBT *),
63 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
64 return p->associate(p, db_txn, s, callback, flags);
66 #if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 0)
67 return p->associate(p, s, callback, flags);
75 static int db_compat_open(DB *db, char *file, char *name, DBTYPE type, int mode)
79 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
80 ret = db->open(db, db_txn, file, name, type, DB_CREATE, mode);
82 ret = db->open(db, file, name, type, DB_CREATE, mode);
86 LOG(log_error, logtype_cnid, "error opening database %s: %s", name, db_strerror(ret));
94 static int upgrade_required()
100 for (i = 0; old_dbfiles[i] != NULL; i++) {
101 if ( !(stat(old_dbfiles[i], &st) < 0) ) {
105 if (errno != ENOENT) {
106 LOG(log_error, logtype_cnid, "cnid_open: Checking %s gave %s", old_dbfiles[i], strerror(errno));
113 /* --------------- */
114 int dbif_stamp(void *buffer, int size)
122 if ((rc = stat(db_table[0].name, &st)) < 0) {
123 LOG(log_error, logtype_cnid, "error stating database %s: %s", db_table[0].name, db_strerror(rc));
126 memset(buffer, 0, size);
127 memcpy(buffer, &st.st_ctime, sizeof(st.st_ctime));
132 /* --------------- */
134 * We assume our current directory is already the BDB homedir. Otherwise
135 * opening the databases will not work as expected. If we use transactions,
136 * dbif_env_init(), dbif_close() and dbif_stamp() are the only interface
137 * functions that can be called without a valid transaction handle in db_txn.
139 int dbif_env_init(struct db_param *dbp)
142 #ifdef CNID_BACKEND_DBD_TXN
143 char **logfiles = NULL;
147 /* Refuse to do anything if this is an old version of the CNID database */
148 if (upgrade_required()) {
149 LOG(log_error, logtype_cnid, "Found version 1 of the CNID database. Please upgrade to version 2");
153 if ((db_errlog = fopen(DB_ERRLOGFILE, "a")) == NULL)
154 LOG(log_warning, logtype_cnid, "error creating/opening DB errlogfile: %s", strerror(errno));
156 #ifdef CNID_BACKEND_DBD_TXN
157 if ((ret = db_env_create(&db_env, 0))) {
158 LOG(log_error, logtype_cnid, "error creating DB environment: %s",
163 if (db_errlog != NULL)
164 db_env->set_errfile(db_env, db_errlog);
165 db_env->set_verbose(db_env, DB_VERB_RECOVERY, 1);
166 if ((ret = db_env->open(db_env, ".", DBOPTIONS | DB_PRIVATE | DB_RECOVER, 0))) {
167 LOG(log_error, logtype_cnid, "error opening DB environment: %s",
169 db_env->close(db_env, 0);
174 if (db_errlog != NULL)
177 if ((ret = db_env->close(db_env, 0))) {
178 LOG(log_error, logtype_cnid, "error closing DB environment after recovery: %s",
184 if ((ret = db_env_create(&db_env, 0))) {
185 LOG(log_error, logtype_cnid, "error creating DB environment after recovery: %s",
190 if ((ret = db_env->set_cachesize(db_env, 0, 1024 * dbp->cachesize, 0))) {
191 LOG(log_error, logtype_cnid, "error setting DB environment cachesize to %i: %s",
192 dbp->cachesize, db_strerror(ret));
193 db_env->close(db_env, 0);
198 if (db_errlog != NULL)
199 db_env->set_errfile(db_env, db_errlog);
200 if ((ret = db_env->open(db_env, ".", DBOPTIONS , 0))) {
201 LOG(log_error, logtype_cnid, "error opening DB environment after recovery: %s",
203 db_env->close(db_env, 0);
208 #ifdef CNID_BACKEND_DBD_TXN
209 if (dbp->nosync && (ret = db_env->set_flags(db_env, DB_TXN_NOSYNC, 1))) {
210 LOG(log_error, logtype_cnid, "error setting TXN_NOSYNC flag: %s",
212 db_env->close(db_env, 0);
216 if (dbp->logfile_autoremove && db_env->log_archive(db_env, &logfiles, 0)) {
217 LOG(log_error, logtype_cnid, "error getting list of stale logfiles: %s",
219 db_env->close(db_env, 0);
223 if (logfiles != NULL) {
224 for (file = logfiles; *file != NULL; file++) {
225 if (unlink(*file) < 0)
226 LOG(log_warning, logtype_cnid, "Error removing stale logfile %s: %s", *file, strerror(errno));
234 /* --------------- */
235 int dbif_open(struct db_param *dbp _U_, int do_truncate)
241 for (i = 0; i != DBIF_DB_CNT; i++) {
242 if ((ret = db_create(&(db_table[i].db), db_env, 0))) {
243 LOG(log_error, logtype_cnid, "error creating handle for database %s: %s",
244 db_table[i].name, db_strerror(ret));
248 if (db_table[i].general_flags) {
249 if ((ret = db_table[i].db->set_flags(db_table[i].db, db_table[i].general_flags))) {
250 LOG(log_error, logtype_cnid, "error setting flags for database %s: %s",
251 db_table[i].name, db_strerror(ret));
257 #ifndef CNID_BACKEND_DBD_TXN
258 if ((ret = db_table[i].db->set_cachesize(db_table[i].db, 0, 1024 * dbp->cachesize, 0))) {
259 LOG(log_error, logtype_cnid, "error setting DB cachesize to %i for database %s: %s",
260 dbp->cachesize, db_table[i].name, db_strerror(ret));
263 #endif /* CNID_BACKEND_DBD_TXN */
265 if (db_compat_open(db_table[i].db, db_table[0].name, db_table[i].name, db_table[i].type, 0664) < 0)
267 if (db_errlog != NULL)
268 db_table[i].db->set_errfile(db_table[i].db, db_errlog);
270 if (do_truncate && i > 0) {
271 if ((ret = db_table[i].db->truncate(db_table[i].db, db_txn, &count, 0))) {
272 LOG(log_error, logtype_cnid, "error truncating database %s: %s",
273 db_table[i].name, db_strerror(ret));
279 /* TODO: Implement CNID DB versioning info on new databases. */
280 /* TODO: Make transaction support a runtime option. */
281 /* Associate the secondary with the primary. */
282 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DIDNAME].db, didname, (do_truncate)?DB_CREATE:0)) != 0) {
283 LOG(log_error, logtype_cnid, "Failed to associate didname database: %s",db_strerror(ret));
287 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DEVINO].db, devino, (do_truncate)?DB_CREATE:0)) != 0) {
288 LOG(log_error, logtype_cnid, "Failed to associate devino database: %s",db_strerror(ret));
295 /* ------------------------ */
302 for (i = DBIF_DB_CNT -1; i >= 0; i--) {
303 if (db_table[i].db != NULL && (ret = db_table[i].db->close(db_table[i].db, 0))) {
304 LOG(log_error, logtype_cnid, "error closing database %s: %s", db_table[i].name, db_strerror(ret));
313 /* ------------------------ */
322 if (db_env != NULL && (ret = db_env->close(db_env, 0))) {
323 LOG(log_error, logtype_cnid, "error closing DB environment: %s", db_strerror(ret));
326 if (db_errlog != NULL && fclose(db_errlog) == EOF) {
327 LOG(log_error, logtype_cnid, "error closing DB logfile: %s", strerror(errno));
336 * The following three functions are wrappers for DB->get(), DB->put() and
337 * DB->del(). We define them here because we want access to the db_txn
338 * transaction handle and the database handles limited to the functions in this
339 * file. A consequence is that there is always only one transaction in
340 * progress. For nontransactional access db_txn is NULL. All three return -1 on
341 * error. dbif_get()/dbif_del return 1 if the key was found and 0
342 * otherwise. dbif_put() returns 0 if key/val was successfully updated and 1 if
343 * the DB_NOOVERWRITE flag was specified and the key already exists.
345 * All return codes other than DB_NOTFOUND and DB_KEYEXIST from the DB->()
346 * functions are not expected and therefore error conditions.
349 int dbif_get(const int dbi, DBT *key, DBT *val, u_int32_t flags)
352 DB *db = db_table[dbi].db;
354 ret = db->get(db, db_txn, key, val, flags);
356 if (ret == DB_NOTFOUND)
359 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
365 /* search by secondary return primary */
366 int dbif_pget(const int dbi, DBT *key, DBT *pkey, DBT *val, u_int32_t flags)
369 DB *db = db_table[dbi].db;
371 ret = db->pget(db, db_txn, key, pkey, val, flags);
373 #if DB_VERSION_MAJOR >= 4
374 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD) {
376 if (ret == DB_NOTFOUND) {
381 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
387 /* -------------------------- */
388 int dbif_put(const int dbi, DBT *key, DBT *val, u_int32_t flags)
391 DB *db = db_table[dbi].db;
393 ret = db->put(db, db_txn, key, val, flags);
396 if ((flags & DB_NOOVERWRITE) && ret == DB_KEYEXIST) {
399 LOG(log_error, logtype_cnid, "error setting key/value in %s: %s", db_table[dbi].name, db_strerror(errno));
406 int dbif_del(const int dbi, DBT *key, u_int32_t flags)
409 DB *db = db_table[dbi].db;
411 ret = db->del(db, db_txn, key, flags);
413 #if DB_VERSION_MAJOR > 3
414 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD)
416 if (ret == DB_NOTFOUND)
420 LOG(log_error, logtype_cnid, "error deleting key/value from %s: %s", db_table[dbi].name, db_strerror(errno));
426 #ifdef CNID_BACKEND_DBD_TXN
431 #if DB_VERSION_MAJOR >= 4
432 ret = db_env->txn_begin(db_env, NULL, &db_txn, 0);
434 ret = txn_begin(db_env, NULL, &db_txn, 0);
437 LOG(log_error, logtype_cnid, "error starting transaction: %s", db_strerror(errno));
443 int dbif_txn_commit()
446 #if DB_VERSION_MAJOR >= 4
447 ret = db_txn->commit(db_txn, 0);
449 ret = txn_commit(db_txn, 0);
452 LOG(log_error, logtype_cnid, "error committing transaction: %s", db_strerror(errno));
461 #if DB_VERSION_MAJOR >= 4
462 ret = db_txn->abort(db_txn);
464 ret = txn_abort(db_txn);
467 LOG(log_error, logtype_cnid, "error aborting transaction: %s", db_strerror(errno));
473 int dbif_txn_checkpoint(u_int32_t kbyte, u_int32_t min, u_int32_t flags)
476 #if DB_VERSION_MAJOR >= 4
477 ret = db_env->txn_checkpoint(db_env, kbyte, min, flags);
479 ret = txn_checkpoint(db_env, kbyte, min, flags);
482 LOG(log_error, logtype_cnid, "error checkpointing transaction susystem: %s", db_strerror(errno));
496 for (i = 0; i != /* DBIF_DB_CNT*/ 1; i++) {
497 if ((ret = db_table[i].db->sync(db_table[i].db, 0))) {
498 LOG(log_error, logtype_cnid, "error syncing database %s: %s", db_table[i].name, db_strerror(ret));
510 int dbif_count(const int dbi, u_int32_t *count)
514 DB *db = db_table[dbi].db;
516 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
517 ret = db->stat(db, db_txn, &sp, 0);
519 ret = db->stat(db, &sp, 0);
523 LOG(log_error, logtype_cnid, "error getting stat infotmation on database: %s", db_strerror(errno));
527 *count = sp->bt_ndata;
532 #endif /* CNID_BACKEND_DBD_TXN */