2 * $Id: dbif.c,v 1.1.4.11 2004-01-10 06:18:43 didg Exp $
4 * Copyright (C) Joerg Lenneis 2003
5 * All Rights Reserved. See COPYING.
10 #endif /* HAVE_CONFIG_H */
14 #ifdef HAVE_SYS_TYPES_H
15 #include <sys/types.h>
16 #endif /* HAVE_SYS_TYPES_H */
18 #include <sys/types.h>
20 #include <sys/cdefs.h>
22 #include <atalk/logger.h>
27 #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;
34 #ifdef CNID_BACKEND_DBD_TXN
35 #define DBOPTIONS (DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN)
37 #define DBOPTIONS (DB_CREATE | DB_INIT_CDB | DB_INIT_MPOOL)
40 static struct db_table {
43 u_int32_t general_flags;
47 { "cnid2.db", NULL, 0, DB_HASH},
48 { "devino.db", NULL, 0, DB_HASH},
49 { "didname.db", NULL, 0, DB_HASH},
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 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
63 return p->associate(p, db_txn, s, callback, flags);
65 #if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 0)
66 return p->associate(p, s, callback, flags);
74 static int db_compat_open(DB *db, char *file, char *name, DBTYPE type, int mode)
78 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
79 ret = db->open(db, db_txn, file, name, type, DB_CREATE, mode);
81 ret = db->open(db, file, name, type, DB_CREATE, mode);
85 LOG(log_error, logtype_cnid, "error opening database %s: %s", name, db_strerror(ret));
93 static int upgrade_required()
99 for (i = 0; old_dbfiles[i] != NULL; i++) {
100 if ( !(stat(old_dbfiles[i], &st) < 0) ) {
104 if (errno != ENOENT) {
105 LOG(log_error, logtype_cnid, "cnid_open: Checking %s gave %s", old_dbfiles[i], strerror(errno));
112 /* --------------- */
113 int dbif_stamp(void *buffer, int size)
121 if ((rc = stat(db_table[0].name, &st)) < 0) {
122 LOG(log_error, logtype_cnid, "error stating database %s: %s", db_table[0].name, db_strerror(rc));
125 memset(buffer, 0, size);
126 memcpy(buffer, &st.st_ctime, sizeof(st.st_ctime));
131 /* --------------- */
133 * We assume our current directory is already the BDB homedir. Otherwise
134 * opening the databases will not work as expected. If we use transactions,
135 * dbif_env_init(), dbif_close() and dbif_stamp() are the only interface
136 * functions that can be called without a valid transaction handle in db_txn.
138 int dbif_env_init(struct db_param *dbp)
142 /* Refuse to do anything if this is an old version of the CNID database */
143 if (upgrade_required()) {
144 LOG(log_error, logtype_cnid, "Found version 1 of the CNID database. Please upgrade to version 2");
148 if ((db_errlog = fopen(DB_ERRLOGFILE, "a")) == NULL)
149 LOG(log_warning, logtype_cnid, "error creating/opening DB errlogfile: %s", strerror(errno));
151 #ifdef CNID_BACKEND_DBD_TXN
152 if ((ret = db_env_create(&db_env, 0))) {
153 LOG(log_error, logtype_cnid, "error creating DB environment: %s",
158 if (db_errlog != NULL)
159 db_env->set_errfile(db_env, db_errlog);
160 db_env->set_verbose(db_env, DB_VERB_RECOVERY, 1);
161 db_env->set_verbose(db_env, DB_VERB_CHKPOINT, 1);
162 if (ret = db_env->open(db_env, ".", DBOPTIONS | DB_PRIVATE | DB_RECOVER, 0)) {
163 LOG(log_error, logtype_cnid, "error opening DB environment: %s",
165 db_env->close(db_env, 0);
170 if (db_errlog != NULL)
173 if (ret = db_env->close(db_env, 0)) {
174 LOG(log_error, logtype_cnid, "error closing DB environment after recovery: %s",
180 if ((ret = db_env_create(&db_env, 0))) {
181 LOG(log_error, logtype_cnid, "error creating DB environment after recovery: %s",
186 if ((ret = db_env->set_cachesize(db_env, 0, 1024 * dbp->cachesize, 0))) {
187 LOG(log_error, logtype_cnid, "error setting DB environment cachesize to %i: %s",
188 dbp->cachesize, db_strerror(ret));
189 db_env->close(db_env, 0);
194 if (db_errlog != NULL)
195 db_env->set_errfile(db_env, db_errlog);
196 if ((ret = db_env->open(db_env, ".", DBOPTIONS , 0))) {
197 LOG(log_error, logtype_cnid, "error opening DB environment after recovery: %s",
199 db_env->close(db_env, 0);
204 #ifdef CNID_BACKEND_DBD_TXN
205 if (dbp->nosync && (ret = db_env->set_flags(db_env, DB_TXN_NOSYNC, 1))) {
206 LOG(log_error, logtype_cnid, "error setting TXN_NOSYNC flag: %s",
208 db_env->close(db_env, 0);
216 /* --------------- */
217 int dbif_open(struct db_param *dbp)
222 for (i = 0; i != DBIF_DB_CNT; i++) {
223 if ((ret = db_create(&(db_table[i].db), db_env, 0))) {
224 LOG(log_error, logtype_cnid, "error creating handle for database %s: %s",
225 db_table[i].name, db_strerror(ret));
228 if (db_table[i].general_flags) {
229 if ((ret = db_table[i].db->set_flags(db_table[i].db, db_table[i].general_flags))) {
230 LOG(log_error, logtype_cnid, "error setting flags for database %s: %s",
231 db_table[i].name, db_strerror(ret));
236 #ifndef CNID_BACKEND_DBD_TXN
237 if ((ret = db_table[i].db->set_cachesize(db_table[i].db, 0, 1024 * dbp->cachesize, 0))) {
238 LOG(log_error, logtype_cnid, "error setting DB cachesize to %i for database %s: %s",
239 dbp->cachesize, db_table[i].name, db_strerror(ret));
242 #endif /* CNID_BACKEND_DBD_TXN */
244 if (db_compat_open(db_table[i].db, db_table[0].name, db_table[i].name, db_table[i].type, 0664) < 0)
246 if (db_errlog != NULL)
247 db_table[i].db->set_errfile(db_table[i].db, db_errlog);
250 /* TODO: Implement CNID DB versioning info on new databases. */
251 /* TODO: Make transaction support a runtime option. */
252 /* Associate the secondary with the primary. */
253 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DIDNAME].db, didname, 0)) != 0) {
254 LOG(log_error, logtype_cnid, "Failed to associate didname database: %s",db_strerror(ret));
258 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DEVINO].db, devino, 0)) != 0) {
259 LOG(log_error, logtype_cnid, "Failed to associate devino database: %s",db_strerror(ret));
266 /* ------------------------ */
273 for (i = DBIF_DB_CNT -1; i >= 0; i--) {
274 if (db_table[i].db != NULL && (ret = db_table[i].db->close(db_table[i].db, 0))) {
275 LOG(log_error, logtype_cnid, "error closing database %s: %s", db_table[i].name, db_strerror(ret));
279 if (db_env != NULL && (ret = db_env->close(db_env, 0))) {
280 LOG(log_error, logtype_cnid, "error closing DB environment: %s", db_strerror(ret));
283 if (db_errlog != NULL && fclose(db_errlog) == EOF) {
284 LOG(log_error, logtype_cnid, "error closing DB logfile: %s", strerror(errno));
294 * The following three functions are wrappers for DB->get(), DB->put() and
295 * DB->del(). We define them here because we want access to the db_txn
296 * transaction handle and the database handles limited to the functions in this
297 * file. A consequence is that there is always only one transaction in
298 * progress. For nontransactional access db_txn is NULL. All three return -1 on
299 * error. dbif_get()/dbif_del return 1 if the key was found and 0
300 * otherwise. dbif_put() returns 0 if key/val was successfully updated and 1 if
301 * the DB_NOOVERWRITE flag was specified and the key already exists.
303 * All return codes other than DB_NOTFOUND and DB_KEYEXIST from the DB->()
304 * functions are not expected and therefore error conditions.
307 int dbif_get(const int dbi, DBT *key, DBT *val, u_int32_t flags)
310 DB *db = db_table[dbi].db;
312 ret = db->get(db, db_txn, key, val, flags);
314 if (ret == DB_NOTFOUND)
317 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
323 /* search by secondary return primary */
324 int dbif_pget(const int dbi, DBT *key, DBT *pkey, DBT *val, u_int32_t flags)
327 DB *db = db_table[dbi].db;
329 ret = db->pget(db, db_txn, key, pkey, val, flags);
331 #if DB_VERSION_MAJOR >= 4
332 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD) {
334 if (ret == DB_NOTFOUND) {
339 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
345 /* -------------------------- */
346 int dbif_put(const int dbi, DBT *key, DBT *val, u_int32_t flags)
349 DB *db = db_table[dbi].db;
351 ret = db->put(db, db_txn, key, val, flags);
354 if ((flags & DB_NOOVERWRITE) && ret == DB_KEYEXIST) {
357 LOG(log_error, logtype_cnid, "error setting key/value in %s: %s", db_table[dbi].name, db_strerror(errno));
364 int dbif_del(const int dbi, DBT *key, u_int32_t flags)
367 DB *db = db_table[dbi].db;
369 ret = db->del(db, db_txn, key, flags);
371 #if DB_VERSION_MAJOR > 3
372 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD)
374 if (ret == DB_NOTFOUND)
378 LOG(log_error, logtype_cnid, "error deleting key/value from %s: %s", db_table[dbi].name, db_strerror(errno));
384 #ifdef CNID_BACKEND_DBD_TXN
389 #if DB_VERSION_MAJOR >= 4
390 ret = db_env->txn_begin(db_env, NULL, &db_txn, 0);
392 ret = txn_begin(db_env, NULL, &db_txn, 0);
395 LOG(log_error, logtype_cnid, "error starting transaction: %s", db_strerror(errno));
401 int dbif_txn_commit()
404 #if DB_VERSION_MAJOR >= 4
405 ret = db_txn->commit(db_txn, 0);
407 ret = txn_commit(db_txn, 0);
410 LOG(log_error, logtype_cnid, "error committing transaction: %s", db_strerror(errno));
419 #if DB_VERSION_MAJOR >= 4
420 ret = db_txn->abort(db_txn);
422 ret = txn_abort(db_txn);
425 LOG(log_error, logtype_cnid, "error aborting transaction: %s", db_strerror(errno));
431 int dbif_txn_checkpoint(u_int32_t kbyte, u_int32_t min, u_int32_t flags)
434 #if DB_VERSION_MAJOR >= 4
435 ret = db_env->txn_checkpoint(db_env, kbyte, min, flags);
437 ret = txn_checkpoint(db_env, kbyte, min, flags);
440 LOG(log_error, logtype_cnid, "error checkpointing transaction susystem: %s", db_strerror(errno));
454 for (i = 0; i != /* DBIF_DB_CNT*/ 1; i++) {
455 if ((ret = db_table[i].db->sync(db_table[i].db, 0))) {
456 LOG(log_error, logtype_cnid, "error syncing database %s: %s", db_table[i].name, db_strerror(ret));
467 #endif /* CNID_BACKEND_DBD_TXN */