2 * $Id: dbif.c,v 1.5 2009-04-21 08:55:44 franklahm 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"
30 static DB_ENV *db_env = NULL;
31 static DB_TXN *db_txn = NULL;
32 static FILE *db_errlog = NULL;
35 Note: DB_INIT_LOCK is here so we can run the db_* utilities while netatalk is running.
36 It's a likey performance hit, but it might we worth it.
38 #define DBOPTIONS (DB_CREATE | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN)
40 static struct db_table {
43 u_int32_t general_flags;
47 { "cnid2.db", NULL, 0, DB_BTREE},
48 { "devino.db", NULL, 0, DB_BTREE},
49 { "didname.db", NULL, 0, DB_BTREE},
52 static char *old_dbfiles[] = {"cnid.db", NULL};
54 extern int didname(DB *dbp, const DBT *pkey, const DBT *pdata, DBT *skey);
55 extern int devino(DB *dbp, const DBT *pkey, const DBT *pdata, DBT *skey);
58 static int db_compat_associate (DB *p, DB *s,
59 int (*callback)(DB *, const DBT *,const DBT *, DBT *),
62 return p->associate(p, NULL, s, callback, flags);
66 static int db_compat_open(DB *db, char *file, char *name, DBTYPE type, int mode)
70 ret = db->open(db, NULL, file, name, type, DB_CREATE, mode);
73 LOG(log_error, logtype_cnid, "error opening database %s: %s", name, db_strerror(ret));
81 static int upgrade_required()
87 for (i = 0; old_dbfiles[i] != NULL; i++) {
88 if ( !(stat(old_dbfiles[i], &st) < 0) ) {
92 if (errno != ENOENT) {
93 LOG(log_error, logtype_cnid, "cnid_open: Checking %s gave %s", old_dbfiles[i], strerror(errno));
100 /* --------------- */
101 int dbif_stamp(void *buffer, int size)
109 if ((rc = stat(db_table[0].name, &st)) < 0) {
110 LOG(log_error, logtype_cnid, "error stating database %s: %s", db_table[0].name, db_strerror(rc));
113 memset(buffer, 0, size);
114 memcpy(buffer, &st.st_ctime, sizeof(st.st_ctime));
119 /* --------------- */
121 * We assume our current directory is already the BDB homedir. Otherwise
122 * opening the databases will not work as expected.
124 int dbif_env_init(struct db_param *dbp)
127 char **logfiles = NULL;
130 /* Refuse to do anything if this is an old version of the CNID database */
131 if (upgrade_required()) {
132 LOG(log_error, logtype_cnid, "Found version 1 of the CNID database. Please upgrade to version 2");
136 if ((db_errlog = fopen(DB_ERRLOGFILE, "a")) == NULL)
137 LOG(log_warning, logtype_cnid, "error creating/opening DB errlogfile: %s", strerror(errno));
139 if ((ret = db_env_create(&db_env, 0))) {
140 LOG(log_error, logtype_cnid, "error creating DB environment: %s",
146 if (db_errlog != NULL) {
147 db_env->set_errfile(db_env, db_errlog);
148 db_env->set_msgfile(db_env, db_errlog);
151 db_env->set_verbose(db_env, DB_VERB_RECOVERY, 1);
153 /* Open the database for recovery using DB_PRIVATE option which is faster */
154 if ((ret = db_env->open(db_env, ".", DBOPTIONS | DB_PRIVATE | DB_RECOVER, 0))) {
155 LOG(log_error, logtype_cnid, "error opening DB environment: %s",
157 db_env->close(db_env, 0);
162 if (db_errlog != NULL)
165 if ((ret = db_env->close(db_env, 0))) {
166 LOG(log_error, logtype_cnid, "error closing DB environment after recovery: %s",
172 if ((ret = db_env_create(&db_env, 0))) {
173 LOG(log_error, logtype_cnid, "error creating DB environment after recovery: %s",
179 if ((ret = db_env->set_cachesize(db_env, 0, 1024 * dbp->cachesize, 0))) {
180 LOG(log_error, logtype_cnid, "error setting DB environment cachesize to %i: %s",
181 dbp->cachesize, db_strerror(ret));
182 db_env->close(db_env, 0);
187 if (db_errlog != NULL) {
188 db_env->set_errfile(db_env, db_errlog);
189 db_env->set_msgfile(db_env, db_errlog);
191 if ((ret = db_env->open(db_env, ".", DBOPTIONS , 0))) {
192 LOG(log_error, logtype_cnid, "error opening DB environment after recovery: %s",
194 db_env->close(db_env, 0);
199 if ((ret = db_env->set_flags(db_env, DB_AUTO_COMMIT, 1))) {
200 LOG(log_error, logtype_cnid, "error setting DB_AUTO_COMMIT flag: %s",
202 db_env->close(db_env, 0);
207 if (dbp->logfile_autoremove && db_env->log_archive(db_env, &logfiles, 0)) {
208 LOG(log_error, logtype_cnid, "error getting list of stale logfiles: %s",
210 db_env->close(db_env, 0);
214 if (logfiles != NULL) {
215 for (file = logfiles; *file != NULL; file++) {
216 if (unlink(*file) < 0)
217 LOG(log_warning, logtype_cnid, "Error removing stale logfile %s: %s", *file, strerror(errno));
225 /* --------------- */
226 int dbif_open(struct db_param *dbp _U_, int do_truncate)
232 for (i = 0; i != DBIF_DB_CNT; i++) {
233 if ((ret = db_create(&(db_table[i].db), db_env, 0))) {
234 LOG(log_error, logtype_cnid, "error creating handle for database %s: %s",
235 db_table[i].name, db_strerror(ret));
239 if (db_table[i].general_flags) {
240 if ((ret = db_table[i].db->set_flags(db_table[i].db, db_table[i].general_flags))) {
241 LOG(log_error, logtype_cnid, "error setting flags for database %s: %s",
242 db_table[i].name, db_strerror(ret));
247 if (db_compat_open(db_table[i].db, db_table[0].name, db_table[i].name, db_table[i].type, 0664) < 0)
249 if (db_errlog != NULL)
250 db_table[i].db->set_errfile(db_table[i].db, db_errlog);
252 if (do_truncate && i > 0) {
253 if ((ret = db_table[i].db->truncate(db_table[i].db, NULL, &count, 0))) {
254 LOG(log_error, logtype_cnid, "error truncating database %s: %s",
255 db_table[i].name, db_strerror(ret));
261 /* TODO: Implement CNID DB versioning info on new databases. */
263 /* Associate the secondary with the primary. */
264 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DIDNAME].db, didname, (do_truncate)?DB_CREATE:0)) != 0) {
265 LOG(log_error, logtype_cnid, "Failed to associate didname database: %s",db_strerror(ret));
269 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DEVINO].db, devino, (do_truncate)?DB_CREATE:0)) != 0) {
270 LOG(log_error, logtype_cnid, "Failed to associate devino database: %s",db_strerror(ret));
277 /* ------------------------ */
284 for (i = DBIF_DB_CNT -1; i >= 0; i--) {
285 if (db_table[i].db != NULL && (ret = db_table[i].db->close(db_table[i].db, 0))) {
286 LOG(log_error, logtype_cnid, "error closing database %s: %s", db_table[i].name, db_strerror(ret));
295 /* ------------------------ */
304 if (db_env != NULL && (ret = db_env->close(db_env, 0))) {
305 LOG(log_error, logtype_cnid, "error closing DB environment: %s", db_strerror(ret));
308 if (db_errlog != NULL && fclose(db_errlog) == EOF) {
309 LOG(log_error, logtype_cnid, "error closing DB logfile: %s", strerror(errno));
318 * The following three functions are wrappers for DB->get(), DB->put() and DB->del().
319 * All three return -1 on error. dbif_get()/dbif_del return 1 if the key was found and 0
320 * otherwise. dbif_put() returns 0 if key/val was successfully updated and 1 if
321 * the DB_NOOVERWRITE flag was specified and the key already exists.
323 * All return codes other than DB_NOTFOUND and DB_KEYEXIST from the DB->()
324 * functions are not expected and therefore error conditions.
327 int dbif_get(const int dbi, DBT *key, DBT *val, u_int32_t flags)
330 DB *db = db_table[dbi].db;
332 ret = db->get(db, db_txn, key, val, flags);
334 if (ret == DB_NOTFOUND)
337 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
343 /* search by secondary return primary */
344 int dbif_pget(const int dbi, DBT *key, DBT *pkey, DBT *val, u_int32_t flags)
347 DB *db = db_table[dbi].db;
349 ret = db->pget(db, db_txn, key, pkey, val, flags);
351 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD) {
355 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
361 /* -------------------------- */
362 int dbif_put(const int dbi, DBT *key, DBT *val, u_int32_t flags)
365 DB *db = db_table[dbi].db;
367 if (dbif_txn_begin() < 0) {
368 LOG(log_error, logtype_cnid, "error setting key/value in %s: %s", db_table[dbi].name, db_strerror(errno));
372 ret = db->put(db, db_txn, key, val, flags);
375 if ((flags & DB_NOOVERWRITE) && ret == DB_KEYEXIST) {
378 LOG(log_error, logtype_cnid, "error setting key/value in %s: %s", db_table[dbi].name, db_strerror(errno));
385 int dbif_del(const int dbi, DBT *key, u_int32_t flags)
388 DB *db = db_table[dbi].db;
390 if (dbif_txn_begin() < 0) {
391 LOG(log_error, logtype_cnid, "error deleting key/value from %s: %s", db_table[dbi].name, db_strerror(errno));
395 ret = db->del(db, db_txn, key, flags);
397 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD)
400 LOG(log_error, logtype_cnid, "error deleting key/value from %s: %s", db_table[dbi].name, db_strerror(errno));
410 /* If we already have a acitve txn, just return */
414 ret = db_env->txn_begin(db_env, NULL, &db_txn, 0);
417 LOG(log_error, logtype_cnid, "error starting transaction: %s", db_strerror(errno));
423 int dbif_txn_commit()
430 ret = db_txn->commit(db_txn, 0);
434 LOG(log_error, logtype_cnid, "error committing transaction: %s", db_strerror(errno));
447 ret = db_txn->abort(db_txn);
451 LOG(log_error, logtype_cnid, "error aborting transaction: %s", db_strerror(errno));
457 int dbif_txn_checkpoint(u_int32_t kbyte, u_int32_t min, u_int32_t flags)
460 ret = db_env->txn_checkpoint(db_env, kbyte, min, flags);
462 LOG(log_error, logtype_cnid, "error checkpointing transaction susystem: %s", db_strerror(errno));
468 int dbif_count(const int dbi, u_int32_t *count)
472 DB *db = db_table[dbi].db;
474 ret = db->stat(db, NULL, &sp, 0);
477 LOG(log_error, logtype_cnid, "error getting stat infotmation on database: %s", db_strerror(errno));
481 *count = sp->bt_ndata;