/*
- * $Id: cnid_open.c,v 1.13 2001-09-27 15:51:27 jmarcus Exp $
+ * $Id: cnid_open.c,v 1.17 2001-11-04 17:34:15 jmarcus Exp $
*
* Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
* All Rights Reserved. See COPYRIGHT.
#define DBOPTIONS (DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | \
DB_INIT_LOG | DB_INIT_TXN)
#else /* DB_VERSION_MINOR < 1 */
+/*#define DBOPTIONS (DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | \
+DB_INIT_LOG | DB_INIT_TXN | DB_TXN_NOSYNC)*/
#define DBOPTIONS (DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | \
-DB_INIT_LOG | DB_INIT_TXN | DB_TXN_NOSYNC)
+DB_INIT_LOG | DB_INIT_TXN)
#endif /* DB_VERSION_MINOR */
#define MAXITER 0xFFFF /* maximum number of simultaneously open CNID
- * databases. */
+ * databases. */
/* the first compare that's always done. */
static __inline__ int compare_did(const DBT *a, const DBT *b)
sb = (u_int8_t *) b->data + 4;
for (len = MIN(a->size, b->size); len-- > 4; sa++, sb++)
if ((ret = (_diacasemap[*sa] - _diacasemap[*sb])))
- return ret; /* sort by lexical ordering */
+ return ret; /* sort by lexical ordering */
return a->size - b->size; /* sort by length */
}
#endif /* DB_VERSION_MINOR */
{
#if DB_VERSION_MINOR > 1
- return compare_mac(db,a,b);
+ return compare_mac(db,a,b);
#else /* DB_VERSION_MINOR < 1 */
- return compare_mac(a,b);
+ return compare_mac(a,b);
#endif /* DB_VERSION_MINOR */
}
-void *cnid_open(const char *dir)
-{
- struct stat st;
- struct flock lock;
- char path[MAXPATHLEN + 1];
- CNID_private *db;
- DBT key, data;
- int open_flag, len;
- int rc = 0;
-
- if (!dir)
- return NULL;
-
- /* this checks .AppleDB */
- if ((len = strlen(dir)) > (MAXPATHLEN - DBLEN - 1)) {
- syslog(LOG_ERR, "cnid_open: path too large");
- return NULL;
- }
-
- if ((db = (CNID_private *) calloc(1, sizeof(CNID_private))) == NULL) {
- syslog(LOG_ERR, "cnid_open: unable to allocate memory");
- return NULL;
- }
- db->magic = CNID_DB_MAGIC;
-
- strcpy(path, dir);
- if (path[len - 1] != '/') {
- strcat(path, "/");
- len++;
- }
-
- lock.l_type = F_WRLCK;
- lock.l_whence = SEEK_SET;
-
-mkdir_appledb:
- strcpy(path + len, DBHOME);
- if ((stat(path, &st) < 0) && (ad_mkdir(path, 0777) < 0)) {
- syslog(LOG_ERR, "cnid_open: mkdir failed");
- goto fail_adouble;
- }
-
- /* search for a byte lock. this allows us to cleanup the log files
- * at cnid_close() in a clean fashion.
- *
- * NOTE: this won't work if multiple volumes for the same user refer
- * to the same directory. */
- strcat(path, DBLOCKFILE);
- if ((db->lockfd = open(path, O_RDWR | O_CREAT, 0666)) > -1) {
- lock.l_start = 0;
- lock.l_len = 1;
- while (fcntl(db->lockfd, F_SETLK, &lock) < 0) {
- if (++lock.l_start > MAXITER) {
- syslog(LOG_INFO, "cnid_open: can't establish logfile cleanup lock.");
- close(db->lockfd);
- db->lockfd = -1;
- break;
- }
- }
- }
-
- path[len + DBHOMELEN] = '\0';
- open_flag = DB_CREATE;
- /* try a full-blown transactional environment */
- if (db_env_create(&db->dbenv, 0)) {
- syslog(LOG_ERR, "cnid_open: db_env_create failed");
- goto fail_lock;
- }
-
- /* Setup internal deadlock detection. */
- if ((rc = db->dbenv->set_lk_detect(db->dbenv, DB_LOCK_DEFAULT)) != 0) {
- syslog(LOG_ERR, "cnid_open: set_lk_detect failed (%d)", rc);
- goto fail_lock;
- }
+void *cnid_open(const char *dir) {
+ struct stat st;
+ struct flock lock;
+ char path[MAXPATHLEN + 1];
+ CNID_private *db;
+ DBT key, data;
+ DB_TXN *tid;
+ u_int32_t DBEXTRAS = 0;
+ int open_flag, len;
+ int rc;
+
+ if (!dir) {
+ return NULL;
+ }
+
+ /* this checks .AppleDB */
+ if ((len = strlen(dir)) > (MAXPATHLEN - DBLEN - 1)) {
+ syslog(LOG_ERR, "cnid_open: Pathname too large: %s", dir);
+ return NULL;
+ }
+
+ if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
+ syslog(LOG_ERR, "cnid_open: Unable to allocate memory for database");
+ return NULL;
+ }
+
+ db->magic = CNID_DB_MAGIC;
+
+ strcpy(path, dir);
+ if (path[len - 1] != '/') {
+ strcat(path, "/");
+ len++;
+ }
+
+ lock.l_type = F_WRLCK;
+ lock.l_whence = SEEK_SET;
+
+ strcpy(path + len, DBHOME);
+ if ((stat(path, &st) < 0) && (ad_mkdir(path, 0777) < 0)) {
+ syslog(LOG_ERR, "cnid_open: DBHOME mkdir failed");
+ goto fail_adouble;
+ }
+
+ /* Search for a byte lock. This allows us to cleanup the log files
+ * at cnid_close() in a clean fashion.
+ *
+ * NOTE: This won't work if multiple volumes for the same user refer
+ * to the sahe directory. */
+ strcat(path, DBLOCKFILE);
+ if ((db->lockfd = open(path, O_RDWR | O_CREAT, 0666)) > -1) {
+ lock.l_start = 0;
+ lock.l_len = 1;
+ while (fcntl(db->lockfd, F_SETLK, &lock) < 0) {
+ if (++lock.l_start > MAXITER) {
+ syslog(LOG_INFO, "cnid_open: Cannot establish logfile cleanup lock (lock failed)");
+ close(db->lockfd);
+ db->lockfd = -1;
+ break;
+ }
+ }
+ }
+ else {
+ syslog(LOG_INFO, "cnid_open: Cannot establish logfile cleanup lock (open() failed)");
+ }
+
+ if (db->lockfd > -1 && lock.l_start == 0) {
+ /* We test to see if we have exclusive database access. If we do, we
+ * will open the database with the DB_RECOVER flag.
+ */
+#ifdef DEBUG
+ syslog(LOG_INFO, "cnid_open: Opening database with DB_RECOVER flag");
+#endif
+ DBEXTRAS |= DB_RECOVER;
+ }
+
+
+ path[len + DBHOMELEN] = '\0';
+ open_flag = DB_CREATE;
+
+ /* We need to be able to open the database environment with full
+ * transaction, logging, and locking support if we ever hope to
+ * be a true multi-acess file server. */
+ if ((rc = db_env_create(&db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: db_env_create: %s", db_strerror(rc));
+ goto fail_lock;
+ }
+
+ /* Setup internal deadlock detection. */
+ if ((rc = db->dbenv->set_lk_detect(db->dbenv, DB_LOCK_DEFAULT)) != 0) {
+ syslog(LOG_ERR, "cnid_open: set_lk_detect: %s", db_strerror(rc));
+ goto fail_lock;
+ }
#if DB_VERSION_MINOR > 1
- /* Take care of setting the NOSYNC flag in db3 > 3.1.x. */
- if ((rc = db->dbenv->set_flags(db->dbenv, DB_TXN_NOSYNC, 1)) != 0 ) {
- syslog(LOG_ERR, "cnid_open: set_flags failed (%d)", rc);
- goto fail_lock;
- }
+ /* Take care of setting the DB_TXN_NOSYNC flag in db3 > 3.1.x. */
+/* if ((rc = db->dbenv->set_flags(db->dbenv, DB_TXN_NOSYNC, 1)) != 0) {
+ syslog(LOG_ERR, "cnid_open: set_flags: %s", db_strerror(rc));
+ goto fail_lock;
+ }*/
#endif /* DB_VERSION_MINOR > 1 */
- /* Check to see if a DBENV already exists. If it does, join it. */
-/* if (db->dbenv->open(db->dbenv, path, DB_JOINENV, 0666)) {*/
- if (db->dbenv->open(db->dbenv, path, DBOPTIONS, 0666)) {
+ /* Open the database environment. */
+ if ((rc = db->dbenv->open(db->dbenv, path, DBOPTIONS | DBEXTRAS, 0666)) != 0) {
+ if (rc == DB_RUNRECOVERY) {
+ /* This is the mother of all errors. We _must_ fail here. */
+ syslog(LOG_ERR, "cnid_open: CATASTROPHIC ERROR opening database environment. Run db_recovery -c immediately");
+ goto fail_lock;
+ }
+
+ /* We can't get a full transactional environment, so multi-access
+ * is out of the question. Let's assume a read-only environment,
+ * and trry to at least get a shared memory pool. */
+ if ((rc = db->dbenv->open(db->dbenv, path, DB_INIT_MPOOL, 0666)) != 0) {
+ /* Nope, not a MPOOL, either. Last-ditch effort: we'll try to
+ * open the environment with no flags. */
+ if ((rc = db->dbenv->open(db->dbenv, path, 0, 0666)) != 0) {
+ syslog(LOG_ERR, "cnid_open: dbenv->open of %s failed: %s",
+ path, db_strerror(rc));
+ goto fail_lock;
+ }
+ }
+ db->flags |= CNIDFLAG_DB_RO;
+ open_flag = DB_RDONLY;
+ syslog(LOG_INFO, "cnid_open: Obtained read-only database environment");
+ }
- /* try with a shared memory pool */
- if (db->dbenv->open(db->dbenv, path, DB_INIT_MPOOL, 0666)) {
+ /* did/name reverse mapping. We use a BTree for this one. */
+ if ((rc = db_create(&db->db_didname, db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to create did/name database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
- /* try without any options. */
- if (db->dbenv->open(db->dbenv, path, 0, 0666)) {
- syslog(LOG_ERR, "cnid_open: db_env_open failed");
- goto fail_lock;
- }
- }
- db->flags |= CNIDFLAG_DB_RO;
- open_flag = DB_RDONLY;
- syslog(LOG_INFO, "cnid_open: read-only CNID database");
- }
- /*}*/
-
-
- /* did/name reverse mapping. we use a btree for this one. */
- if (db_create(&db->db_didname, db->dbenv, 0))
- goto fail_appinit;
-
- db->db_didname->set_bt_compare(db->db_didname, &compare_unix);
- if (db->db_didname->open(db->db_didname, DBDIDNAME, NULL, DB_BTREE, open_flag, 0666)) {
- goto fail_appinit;
- }
-
- /* check for version. this way we can update the database if we need
- to change the format in any way. */
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- key.data = DBVERSION_KEY;
- key.size = DBVERSION_KEYLEN;
- while ((rc = db->db_didname->get(db->db_didname, NULL, &key, &data, 0))) {
- switch (rc) {
- case DB_LOCK_DEADLOCK:
- continue;
-
- case DB_NOTFOUND:
- {
- u_int32_t version = htonl(DBVERSION);
-
- data.data = &version;
- data.size = sizeof(version);
+ db->db_didname->set_bt_compare(db->db_didname, &compare_unix);
+ if ((rc = db->db_didname->open(db->db_didname, DBDIDNAME, NULL,
+ DB_BTREE, open_flag, 0666))) {
+ syslog(LOG_ERR, "cnid_open: Failed to open did/name database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
}
+
+ /* Check for version. This way we can update the database if we need
+ * to change the format in any way. */
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+ key.data = DBVERSION_KEY;
+ key.size = DBVERSION_KEYLEN;
+
dbversion_retry:
- if ((rc = db->db_didname->put(db->db_didname, NULL, &key, &data,
- DB_NOOVERWRITE)))
- if (rc == DB_LOCK_DEADLOCK)
- goto dbversion_retry;
- break;
- default:
- /* uh oh. something bad happened. bail. */
- db->db_didname->close(db->db_didname, 0);
- goto fail_appinit;
- }
- }
-
- /* XXX: in the future, we might check for version number here. */
+ if ((rc = txn_begin(db->dbenv, NULL, &tid, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: txn_begin: failed to check db version: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+
+ while ((rc = db->db_didname->get(db->db_didname, tid, &key, &data, DB_RMW))) {
+ int ret;
+ switch (rc) {
+ case DB_LOCK_DEADLOCK:
+ if ((ret = txn_abort(tid)) != 0) {
+ syslog(LOG_ERR, "cnid_open: txn_abort: %s", db_strerror(ret));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+ goto dbversion_retry;
+ case DB_NOTFOUND:
+ {
+ u_int32_t version = htonl(DBVERSION);
+
+ data.data = &version;
+ data.size = sizeof(version);
+ }
+
+ if ((ret = db->db_didname->put(db->db_didname, tid, &key, &data,
+ DB_NOOVERWRITE))) {
+ if (ret == DB_LOCK_DEADLOCK) {
+ if ((ret = txn_abort(tid)) != 0) {
+ syslog(LOG_ERR, "cnid_open: txn_abort: %s",
+ db_strerror(ret));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+ goto dbversion_retry;
+ }
+ else if (ret == DB_RUNRECOVERY) {
+ /* At this point, we don't care if the transaction aborts
+ * successfully or not. */
+ txn_abort(tid);
+ syslog(LOG_ERR, "cnid_open: Error putting new version: %s",
+ db_strerror(ret));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+ }
+ break; /* while loop */
+ default:
+ txn_abort(tid);
+ syslog(LOG_ERR, "cnid_open: Failed to check db version: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+ }
+
+ if ((rc = txn_commit(tid, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to commit db version: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+
+ /* TODO In the future we might check for version number here. */
#if 0
- memcpy(&version, data.data, sizeof(version));
- if (version != htonl(DBVERSION)) {
- /* fix up stuff */
- }
+ memcpy(&version, data.data, sizeof(version));
+ if (version != ntohl(DBVERSION)) {
+ /* Do stuff here. */
+ }
#endif /* 0 */
#ifdef EXTENDED_DB
- /* did/macname mapping. btree this one. */
- if (db_create(&db->db_macname, db->dbenv, 0))
- goto fail_appinit;
-
- db->db_macname->set_bt_compare(db->db_macname, &compare_mac);
- if (db->db_macname->open(db->db_macname, DBMACNAME, NULL, DB_BTREE, open_flag, 0666)) {
- db->db_didname->close(db->db_didname, 0);
- goto fail_appinit;
- }
-
- /* did/shortname mapping */
- if (db_create(&db->db_shortname, db->dbenv, 0))
- goto fail_appinit;
-
- db->db_shortname->set_bt_compare(db->db_shortname, &compare_mac);
- if (db->db_shortname->open(db->db_shortname, DBSHORTNAME, NULL, DB_BTREE, open_flag, 0666)) {
- db->db_didname->close(db->db_didname, 0);
- db->db_macname->close(db->db_macname, 0);
- goto fail_appinit;
- }
-
- /* did/longname mapping */
- if (db_create(&db->db_longname, db->dbenv, 0))
- goto fail_appinit;
-
- db->db_longname->set_bt_compare(db->db_longname, &compare_unicode);
- if (db->db_longname->open(db->db_longname, DBLONGNAME, NULL, DB_BTREE, open_flag, 0666)) {
- db->db_didname->close(db->db_didname, 0);
- db->db_macname->close(db->db_macname, 0);
- db->db_shortname->close(db->db_shortname, 0);
- goto fail_appinit;
- }
+ /* did/macname (31 character) mapping. Use a BTree for this one. */
+ if ((rc = db_create(&db->db_macname, db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to create did/macname database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+
+ db->db_macname->set_bt_compare(db->db_macname, &compare_mac);
+ if ((rc = db->db_macname->open(db->db_macname, DBMACNAME, NULL, DB_BTREE, open_flag, 0666)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to open did/macname database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+
+ /* did/shortname (DOS 8.3) mapping. Use a BTree for this one. */
+ if ((rc = db_create(&db->db_shortname, db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to create did/shortname database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ db->db_macname->close(db->db_macname, 0);
+ goto fail_appinit;
+ }
+
+ db->db_shortname->set_bt_compare(db->db_shortname, &compare_mac);
+ if ((rc = db->db_shortname->open(db->db_shortname, DBSHORTNAME, NULL, DB_BTREE, open_flag, 0666)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to open did/shortname database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ db->db_macname->close(db->db_macname, 0);
+ goto fail_appinit;
+ }
+
+ /* did/longname (Unicode) mapping. Use a BTree for this one. */
+ if ((rc = db_create(&db->db_longname, db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to create did/longname database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ db->db_macname->close(db->db_macname, 0);
+ db->db_shortname->close(db->db_shortname, 0);
+ goto fail_appinit;
+ }
+
+ db->db_longname->set_bt_compare(db->db_longname, &compare_unicode);
+ if ((rc = db->db_longname->open(db->db_longname, DBLONGNAME, NULL, DB_BTREE, open_flag, 0666)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to open did/longname database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+ db->db_macname->close(db->db_macname, 0);
+ db->db_shortname->close(db->db_shortname, 0);
+ goto fail_appinit;
+ }
#endif /* EXTENDED_DB */
- /* dev/ino reverse mapping. we hash this one. */
- if (db_create(&db->db_devino, db->dbenv, 0))
- goto fail_appinit;
+ /* dev/ino reverse mapping. Use a hash for this one. */
+ if ((rc = db_create(&db->db_devino, db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to create dev/ino database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+#ifdef EXTENDED_DB
+ db->db_macname->close(db->db_macname, 0);
+ db->db_shortname->close(db->db_shortname, 0);
+ db->db_longname->close(db->db_longname, 0);
+#endif /* EXTENDED_DB */
+ goto fail_appinit;
+ }
- if (db->db_devino->open(db->db_devino, DBDEVINO, NULL, DB_HASH, open_flag, 0666)) {
- db->db_didname->close(db->db_didname, 0);
+ if ((rc = db->db_devino->open(db->db_devino, DBDEVINO, NULL, DB_HASH, open_flag, 0666)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to open devino database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
#ifdef EXTENDED_DB
- db->db_macname->close(db->db_macname, 0);
- db->db_shortname->close(db->db_shortname, 0);
- db->db_longname->close(db->db_longname, 0);
+ db->db_macname->close(db->db_macname, 0);
+ db->db_shortname->close(db->db_shortname, 0);
+ db->db_longname->close(db->db_longname, 0);
#endif /* EXTENDED_DB */
- goto fail_appinit;
- }
+ goto fail_appinit;
+ }
- /* main cnid database. we hash this one as well. */
- if (db_create(&db->db_cnid, db->dbenv, 0))
- goto fail_appinit;
+ /* Main CNID database. Use a hash for this one. */
+ if ((rc = db_create(&db->db_cnid, db->dbenv, 0)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to create cnid database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
+#ifdef EXTENDED_DB
+ db->db_macname->close(db->db_macname, 0);
+ db->db_shortname->close(db->db_shortname, 0);
+ db->db_longname->close(db->db_longname, 0);
+#endif /* EXTENDED_DB */
+ db->db_devino->close(db->db_devino, 0);
+ goto fail_appinit;
+ }
- if (db->db_cnid->open(db->db_cnid, DBCNID, NULL, DB_HASH, open_flag, 0666)) {
- db->db_didname->close(db->db_didname, 0);
+
+ if ((rc = db->db_cnid->open(db->db_cnid, DBCNID, NULL, DB_HASH, open_flag, 0666)) != 0) {
+ syslog(LOG_ERR, "cnid_open: Failed to open dev/ino database: %s",
+ db_strerror(rc));
+ db->db_didname->close(db->db_didname, 0);
#ifdef EXTENDED_DB
- db->db_macname->close(db->db_macname, 0);
- db->db_shortname->close(db->db_shortname, 0);
- db->db_longname->close(db->db_longname, 0);
+ db->db_macname->close(db->db_macname, 0);
+ db->db_shortname->close(db->db_shortname, 0);
+ db->db_longname->close(db->db_longname, 0);
#endif /* EXTENDED_DB */
- db->db_devino->close(db->db_devino, 0);
- goto fail_appinit;
- }
+ goto fail_appinit;
+ }
- return db;
+ return db;
fail_appinit:
- syslog(LOG_ERR, "cnid_open: db_open failed");
- db->dbenv->close(db->dbenv, 0);
+ syslog(LOG_ERR, "cnid_open: Failed to setup CNID DB environment");
+ db->dbenv->close(db->dbenv, 0);
fail_lock:
- if (db->lockfd > -1)
- close(db->lockfd);
+ if (db->lockfd > -1) {
+ close(db->lockfd);
+ }
fail_adouble:
fail_db:
- free(db);
- return NULL;
+ free(db);
+ return NULL;
}
#endif /* CNID_DB */
+
+
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