2 * $Id: dbif.c,v 1.1.4.1 2003-09-09 16:42:20 didg Exp $
4 * Copyright (C) Joerg Lenneis 2003
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
16 #include <atalk/logger.h>
17 #ifdef HAVE_SYS_TYPES_H
18 #include <sys/types.h>
19 #endif /* HAVE_SYS_TYPES_H */
24 #include <sys/types.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)
41 static struct db_table {
44 u_int32_t general_flags;
48 { "cnid2.db", NULL, 0, DB_HASH},
49 { "devino.db", NULL, 0, DB_HASH},
50 { "didname.db", NULL, 0, DB_HASH},
54 * We assume our current directory is already the BDB homedir. Otherwise
55 * opening the databases will not work as expected.
58 extern int didname(DB *dbp, const DBT *pkey, const DBT *pdata, DBT *skey);
59 extern int devino(DB *dbp, const DBT *pkey, const DBT *pdata, DBT *skey);
61 static int env_init(struct db_param *dbp)
65 if ((ret = db_env_create(&db_env, 0))) {
66 LOG(log_error, logtype_cnid, "error creating DB environment: %s",
70 #ifdef CNID_BACKEND_DBD_TXN
71 if (db_errlog != NULL)
72 db_env->set_errfile(db_env, db_errlog);
73 db_env->set_verbose(db_env, DB_VERB_RECOVERY, 1);
74 db_env->set_verbose(db_env, DB_VERB_CHKPOINT, 1);
75 if (ret = db_env->open(db_env, ".", DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG |
76 DB_INIT_MPOOL | DB_INIT_TXN | DB_PRIVATE | DB_RECOVER, 0)) {
77 LOG(log_error, logtype_cnid, "error opening DB environment: %s",
79 db_env->close(db_env, 0);
83 if (db_errlog != NULL)
86 if (ret = db_env->close(db_env, 0)) {
87 LOG(log_error, logtype_cnid, "error closining DB environment after recovery: %s",
92 if ((ret = db_env_create(&db_env, 0))) {
93 LOG(log_error, logtype_cnid, "error creating DB environment after recovery: %s",
97 if ((ret = db_env->set_cachesize(db_env, 0, 1024 * dbp->cachesize, 0))) {
98 LOG(log_error, logtype_cnid, "error settining DB environment cachesize to %i: %s",
99 dbp->cachesize, db_strerror(ret));
100 db_env->close(db_env, 0);
104 if (db_errlog != NULL)
105 db_env->set_errfile(db_env, db_errlog);
106 if ((ret = db_env->open(db_env, ".", DBOPTIONS , 0))) {
107 LOG(log_error, logtype_cnid, "error opening DB environment after recovery: %s",
109 db_env->close(db_env, 0);
113 #ifdef CNID_BACKEND_DBD_TXN
114 if (dbp->nosync && (ret = db_env->set_flags(db_env, DB_TXN_NOSYNC, 1))) {
115 LOG(log_error, logtype_cnid, "error setting TXN_NOSYNC flag: %s",
117 db_env->close(db_env, 0);
124 /* --------------- */
125 static int db_compat_associate (DB *p, DB *s,
126 int (*callback)(DB *, const DBT *,const DBT *, DBT *),
129 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
130 return p->associate(p, NULL, s, callback, flags);
132 return p->associate(p, s, callback, flags);
136 /* --------------- */
137 static int db_compat_open(DB *db, char *file, char *name, DBTYPE type, int mode)
141 #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
142 #ifdef CNID_BACKEND_DBD_TXN
143 ret = db->open(db, NULL, file, name, type, DB_CREATE | DB_AUTO_COMMIT, mode);
145 ret = db->open(db, NULL, file, name, type, DB_CREATE , mode);
148 ret = db->open(db, file, name, type, DB_CREATE , mode);
152 LOG(log_error, logtype_cnid, "error opening database %s: %s", name, db_strerror(ret));
159 /* --------------- */
160 int dbif_stamp(void *buffer, int size)
168 if ((rc = stat(db_table[0].name, &st)) < 0) {
169 LOG(log_error, logtype_cnid, "error stating database %s: %s", db_table[0].name, db_strerror(rc));
172 memset(buffer, 0, size);
173 memcpy(buffer, &st.st_ctime, sizeof(st.st_ctime));
178 /* --------------- */
179 int dbif_open(struct db_param *dbp)
184 if ((db_errlog = fopen(DB_ERRLOGFILE, "a")) == NULL)
185 LOG(log_warning, logtype_cnid, "error creating/opening DB errlogfile: %s", strerror(errno));
187 if (env_init(dbp) < 0)
190 /* db_env will point to a valid environment handle from here onwards if
191 transactions are used or to NULL otherwise */
193 for (i = 0; i != DBIF_DB_CNT; i++) {
194 if ((ret = db_create(&(db_table[i].db), db_env, 0))) {
195 LOG(log_error, logtype_cnid, "error creating handle for database %s: %s",
196 db_table[i].name, db_strerror(ret));
199 if (db_table[i].general_flags) {
200 if ((ret = db_table[i].db->set_flags(db_table[i].db, db_table[i].general_flags))) {
201 LOG(log_error, logtype_cnid, "error setting flags for database %s: %s",
202 db_table[i].name, db_strerror(ret));
207 #ifndef CNID_BACKEND_DBD_TXN
208 if ((ret = db_table[i].db->set_cachesize(db_table[i].db, 0, 1024 * dbp->cachesize, 0))) {
209 LOG(log_error, logtype_cnid, "error setting DB cachesize to %i for database %s: %s",
210 dbp->cachesize, db_table[i].name, db_strerror(ret));
213 #endif /* CNID_BACKEND_DBD_TXN */
215 if (db_compat_open(db_table[i].db, db_table[0].name, db_table[i].name, db_table[i].type, 0664) < 0)
217 if (db_errlog != NULL)
218 db_table[i].db->set_errfile(db_table[i].db, db_errlog);
221 /* TODO: Implement CNID DB versioning info on new databases. */
222 /* TODO: Make transaction support a runtime option. */
223 /* Associate the secondary with the primary. */
224 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DIDNAME].db, didname, 0)) != 0) {
225 LOG(log_error, logtype_cnid, "Failed to associate didname database: %s",db_strerror(ret));
229 if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DEVINO].db, devino, 0)) != 0) {
230 LOG(log_error, logtype_cnid, "Failed to associate devino database: %s",db_strerror(ret));
236 /* ------------------------ */
243 for (i = DBIF_DB_CNT -1; i >= 0; i--) {
244 if (db_table[i].db != NULL && (ret = db_table[i].db->close(db_table[i].db, 0))) {
245 LOG(log_error, logtype_cnid, "error closing database %s: %s", db_table[i].name, db_strerror(ret));
249 if (db_env != NULL && (ret = db_env->close(db_env, 0))) {
250 LOG(log_error, logtype_cnid, "error closing DB environment: %s", db_strerror(ret));
253 if (db_errlog != NULL && fclose(db_errlog) == EOF) {
254 LOG(log_error, logtype_cnid, "error closing DB logfile: %s", strerror(errno));
264 * The following three functions are wrappers for DB->get(), DB->put() and
265 * DB->del(). We define them here because we want access to the db_txn
266 * transaction handle and the database handles limited to the functions in this
267 * file. A consequence is that there is always only one transaction in
268 * progress. For nontransactional access db_txn is NULL. All three return -1 on
269 * error. dbif_get()/dbif_del return 1 if the key was found and 0
270 * otherwise. dbif_put() returns 0 if key/val was successfully updated and 1 if
271 * the DB_NOOVERWRITE flag was specified and the key already exists.
273 * All return codes other than DB_NOTFOUND and DB_KEYEXIST from the DB->()
274 * functions are not expected and therefore error conditions.
277 int dbif_get(const int dbi, DBT *key, DBT *val, u_int32_t flags)
280 DB *db = db_table[dbi].db;
282 ret = db->get(db, db_txn, key, val, flags);
284 if (ret == DB_NOTFOUND)
287 LOG(log_error, logtype_cnid, "error retrieving value from %s: %s", db_table[dbi].name, db_strerror(errno));
293 int dbif_put(const int dbi, DBT *key, DBT *val, u_int32_t flags)
296 DB *db = db_table[dbi].db;
298 ret = db->put(db, db_txn, key, val, flags);
301 if ((flags & DB_NOOVERWRITE) && ret == DB_KEYEXIST) {
304 LOG(log_error, logtype_cnid, "error setting key/value in %s: %s", db_table[dbi].name, db_strerror(errno));
311 int dbif_del(const int dbi, DBT *key, u_int32_t flags)
314 DB *db = db_table[dbi].db;
316 ret = db->del(db, db_txn, key, flags);
318 if (ret == DB_NOTFOUND || ret == DB_SECONDARY_BAD)
321 LOG(log_error, logtype_cnid, "error deleting key/value from %s: %s", db_table[dbi].name, db_strerror(errno));
327 #ifdef CNID_BACKEND_DBD_TXN
332 #if DB_VERSION_MAJOR >= 4
333 ret = db_env->txn_begin(db_env, NULL, &db_txn, 0);
335 ret = txn_begin(db_env, NULL, &db_txn, 0);
338 LOG(log_error, logtype_cnid, "error starting transaction: %s", db_strerror(errno));
344 int dbif_txn_commit()
347 #if DB_VERSION_MAJOR >= 4
348 ret = db_txn->commit(db_txn, 0);
350 ret = txn_commit(db_txn, 0);
353 LOG(log_error, logtype_cnid, "error committing transaction: %s", db_strerror(errno));
362 #if DB_VERSION_MAJOR >= 4
363 ret = db_txn->abort(db_txn);
365 ret = txn_abort(db_txn);
368 LOG(log_error, logtype_cnid, "error aborting transaction: %s", db_strerror(errno));
374 int dbif_txn_checkpoint(u_int32_t kbyte, u_int32_t min, u_int32_t flags)
377 #if DB_VERSION_MAJOR >= 4
378 ret = db_env->txn_checkpoint(db_env, kbyte, min, flags);
380 ret = txn_checkpoint(db_env, kbyte, min, flags);
383 LOG(log_error, logtype_cnid, "error checkpointing transaction susystem: %s", db_strerror(errno));
397 for (i = 0; i != /* DBIF_DB_CNT*/ 1; i++) {
398 if ((ret = db_table[i].db->sync(db_table[i].db, 0))) {
399 LOG(log_error, logtype_cnid, "error syncing database %s: %s", db_table[i].name, db_strerror(ret));
410 #endif /* CNID_BACKEND_DBD_TXN */