X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fdatabase.c;h=94d283714e126154b500c9c5965463788ffc8bc3;hb=HEAD;hp=bb6505aec0d539c4cd74fdc88497531ee79f9641;hpb=022127a24d30b0dce9b640f93f49b3cc93cf12c4;p=citadel.git diff --git a/citadel/database.c b/citadel/database.c deleted file mode 100644 index bb6505aec..000000000 --- a/citadel/database.c +++ /dev/null @@ -1,967 +0,0 @@ -/* - * This is a data store backend for the Citadel server which uses Berkeley DB. - * - * Copyright (c) 1987-2012 by the citadel.org team - * - * This program is open source software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version 3. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -/***************************************************************************** - Tunable configuration parameters for the Berkeley DB back end - *****************************************************************************/ - -/* Citadel will checkpoint the db at the end of every session, but only if - * the specified number of kilobytes has been written, or if the specified - * number of minutes has passed, since the last checkpoint. - */ -#define MAX_CHECKPOINT_KBYTES 256 -#define MAX_CHECKPOINT_MINUTES 15 - -/*****************************************************************************/ - -#include "sysdep.h" -#include -#include -#include - -#ifdef HAVE_DB_H -#include -#elif defined(HAVE_DB4_DB_H) -#include -#else -#error Neither nor was found by configure. Install db4-devel. -#endif - - -#if DB_VERSION_MAJOR < 4 || DB_VERSION_MINOR < 1 -#error Citadel requires Berkeley DB v4.1 or newer. Please upgrade. -#endif - - -#include - -#include "ctdl_module.h" -#include "control.h" -#include "citserver.h" - - -static DB *dbp[MAXCDB]; /* One DB handle for each Citadel database */ -static DB_ENV *dbenv; /* The DB environment (global) */ - - -void cdb_abort(void) { - syslog(LOG_DEBUG, - "citserver is stopping in order to prevent data loss. uid=%d gid=%d euid=%d egid=%d", - getuid(), - getgid(), - geteuid(), - getegid() - ); - cit_backtrace(); - exit(CTDLEXIT_DB); -} - - -/* Verbose logging callback */ -void cdb_verbose_log(const DB_ENV *dbenv, const char *msg) -{ - if (!IsEmptyStr(msg)) { - syslog(LOG_DEBUG, "DB: %s", msg); - cit_backtrace(); - } -} - - -/* Verbose logging callback */ -void cdb_verbose_err(const DB_ENV *dbenv, const char *errpfx, const char *msg) -{ - int *FOO = NULL; - syslog(LOG_ALERT, "DB: %s", msg); - cit_backtrace(); - *FOO = 1; -} - - -/* just a little helper function */ -static void txabort(DB_TXN * tid) -{ - int ret; - - ret = tid->abort(tid); - - if (ret) { - syslog(LOG_EMERG, "bdb(): txn_abort: %s", db_strerror(ret)); - cdb_abort(); - } -} - -/* this one is even more helpful than the last. */ -static void txcommit(DB_TXN * tid) -{ - int ret; - - ret = tid->commit(tid, 0); - - if (ret) { - syslog(LOG_EMERG, "bdb(): txn_commit: %s", db_strerror(ret)); - cdb_abort(); - } -} - -/* are you sensing a pattern yet? */ -static void txbegin(DB_TXN ** tid) -{ - int ret; - - ret = dbenv->txn_begin(dbenv, NULL, tid, 0); - - if (ret) { - syslog(LOG_EMERG, "bdb(): txn_begin: %s", db_strerror(ret)); - cdb_abort(); - } -} - -static void dbpanic(DB_ENV * env, int errval) -{ - syslog(LOG_EMERG, "bdb(): PANIC: %s", db_strerror(errval)); - cit_backtrace(); -} - -static void cclose(DBC * cursor) -{ - int ret; - - if ((ret = cursor->c_close(cursor))) { - syslog(LOG_EMERG, "bdb(): c_close: %s", db_strerror(ret)); - cdb_abort(); - } -} - -static void bailIfCursor(DBC ** cursors, const char *msg) -{ - int i; - - for (i = 0; i < MAXCDB; i++) - if (cursors[i] != NULL) { - syslog(LOG_EMERG, "bdb(): cursor still in progress on cdb %02x: %s", i, msg); - cdb_abort(); - } -} - - -void cdb_check_handles(void) -{ - bailIfCursor(TSD->cursors, "in check_handles"); - - if (TSD->tid != NULL) { - syslog(LOG_EMERG, "bdb(): transaction still in progress!"); - cdb_abort(); - } -} - - -/* - * Cull the database logs - */ -void cdb_cull_logs(void) -{ - u_int32_t flags; - int ret; - char **file, **list; - char errmsg[SIZ]; - - flags = DB_ARCH_ABS; - - /* Get the list of names. */ - if ((ret = dbenv->log_archive(dbenv, &list, flags)) != 0) { - syslog(LOG_ERR, "cdb_cull_logs: %s", db_strerror(ret)); - return; - } - - /* Print the list of names. */ - if (list != NULL) { - for (file = list; *file != NULL; ++file) { - syslog(LOG_DEBUG, "Deleting log: %s", *file); - ret = unlink(*file); - if (ret != 0) { - snprintf(errmsg, sizeof(errmsg), - " ** ERROR **\n \n \n " - "Citadel was unable to delete the " - "database log file '%s' because of the " - "following error:\n \n %s\n \n" - " This log file is no longer in use " - "and may be safely deleted.\n", - *file, strerror(errno)); - CtdlAideMessage(errmsg, "Database Warning Message"); - } - } - free(list); - } -} - - -/* - * Request a checkpoint of the database. Called once per minute by the thread manager. - */ -void cdb_checkpoint(void) -{ - int ret; - - syslog(LOG_DEBUG, "-- db checkpoint --"); - ret = dbenv->txn_checkpoint(dbenv, MAX_CHECKPOINT_KBYTES, MAX_CHECKPOINT_MINUTES, 0); - - if (ret != 0) { - syslog(LOG_EMERG, "cdb_checkpoint: txn_checkpoint: %s", db_strerror(ret)); - cdb_abort(); - } - - /* After a successful checkpoint, we can cull the unused logs */ - if (config.c_auto_cull) { - cdb_cull_logs(); - } -} - - - -/* - * Open the various databases we'll be using. Any database which - * does not exist should be created. Note that we don't need a - * critical section here, because there aren't any active threads - * manipulating the database yet. - */ -void open_databases(void) -{ - int ret; - int i; - char dbfilename[32]; - u_int32_t flags = 0; - int dbversion_major, dbversion_minor, dbversion_patch; - int current_dbversion = 0; - - syslog(LOG_DEBUG, "bdb(): open_databases() starting"); - syslog(LOG_DEBUG, "Compiled db: %s", DB_VERSION_STRING); - syslog(LOG_INFO, " Linked db: %s", - db_version(&dbversion_major, &dbversion_minor, &dbversion_patch)); - - current_dbversion = (dbversion_major * 1000000) + (dbversion_minor * 1000) + dbversion_patch; - - syslog(LOG_DEBUG, "Calculated dbversion: %d", current_dbversion); - syslog(LOG_DEBUG, " Previous dbversion: %d", CitControl.MMdbversion); - - if ( (getenv("SUPPRESS_DBVERSION_CHECK") == NULL) - && (CitControl.MMdbversion > current_dbversion) ) { - syslog(LOG_EMERG, "You are attempting to run the Citadel server using a version"); - syslog(LOG_EMERG, "of Berkeley DB that is older than that which last created or"); - syslog(LOG_EMERG, "updated the database. Because this would probably cause data"); - syslog(LOG_EMERG, "corruption or loss, the server is aborting execution now."); - exit(CTDLEXIT_DB); - } - - CitControl.MMdbversion = current_dbversion; - put_control(); - - syslog(LOG_INFO, "Linked zlib: %s\n", zlibVersion()); - - /* - * Silently try to create the database subdirectory. If it's - * already there, no problem. - */ - if ((mkdir(ctdl_data_dir, 0700) != 0) && (errno != EEXIST)){ - syslog(LOG_EMERG, - "unable to create database directory [%s]: %s", - ctdl_data_dir, strerror(errno)); - } - if (chmod(ctdl_data_dir, 0700) != 0){ - syslog(LOG_EMERG, - "unable to set database directory accessrights [%s]: %s", - ctdl_data_dir, strerror(errno)); - } - if (chown(ctdl_data_dir, CTDLUID, (-1)) != 0){ - syslog(LOG_EMERG, - "unable to set the owner for [%s]: %s", - ctdl_data_dir, strerror(errno)); - } - syslog(LOG_DEBUG, "bdb(): Setting up DB environment\n"); - /* db_env_set_func_yield((int (*)(u_long, u_long))sched_yield); */ - ret = db_env_create(&dbenv, 0); - if (ret) { - syslog(LOG_EMERG, "bdb(): db_env_create: %s\n", db_strerror(ret)); - syslog(LOG_EMERG, "exit code %d\n", ret); - exit(CTDLEXIT_DB); - } - dbenv->set_errpfx(dbenv, "citserver"); - dbenv->set_paniccall(dbenv, dbpanic); - dbenv->set_errcall(dbenv, cdb_verbose_err); - dbenv->set_errpfx(dbenv, "ctdl"); -#if (DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR >= 3) - dbenv->set_msgcall(dbenv, cdb_verbose_log); -#endif - dbenv->set_verbose(dbenv, DB_VERB_DEADLOCK, 1); - dbenv->set_verbose(dbenv, DB_VERB_RECOVERY, 1); - - /* - * We want to specify the shared memory buffer pool cachesize, - * but everything else is the default. - */ - ret = dbenv->set_cachesize(dbenv, 0, 64 * 1024, 0); - if (ret) { - syslog(LOG_EMERG, "bdb(): set_cachesize: %s\n", db_strerror(ret)); - dbenv->close(dbenv, 0); - syslog(LOG_EMERG, "exit code %d\n", ret); - exit(CTDLEXIT_DB); - } - - if ((ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT))) { - syslog(LOG_EMERG, "bdb(): set_lk_detect: %s\n", db_strerror(ret)); - dbenv->close(dbenv, 0); - syslog(LOG_EMERG, "exit code %d\n", ret); - exit(CTDLEXIT_DB); - } - - flags = DB_CREATE | DB_INIT_MPOOL | DB_PRIVATE | DB_INIT_TXN | DB_INIT_LOCK | DB_THREAD | DB_RECOVER; - syslog(LOG_DEBUG, "dbenv->open(dbenv, %s, %d, 0)\n", ctdl_data_dir, flags); - ret = dbenv->open(dbenv, ctdl_data_dir, flags, 0); - if (ret == DB_RUNRECOVERY) { - syslog(LOG_ALERT, "dbenv->open: %s\n", db_strerror(ret)); - syslog(LOG_ALERT, "Attempting recovery...\n"); - flags |= DB_RECOVER; - ret = dbenv->open(dbenv, ctdl_data_dir, flags, 0); - } - if (ret == DB_RUNRECOVERY) { - syslog(LOG_ALERT, "dbenv->open: %s\n", db_strerror(ret)); - syslog(LOG_ALERT, "Attempting catastrophic recovery...\n"); - flags &= ~DB_RECOVER; - flags |= DB_RECOVER_FATAL; - ret = dbenv->open(dbenv, ctdl_data_dir, flags, 0); - } - if (ret) { - syslog(LOG_EMERG, "dbenv->open: %s\n", db_strerror(ret)); - dbenv->close(dbenv, 0); - syslog(LOG_EMERG, "exit code %d\n", ret); - exit(CTDLEXIT_DB); - } - - syslog(LOG_INFO, "Starting up DB\n"); - - for (i = 0; i < MAXCDB; ++i) { - - /* Create a database handle */ - ret = db_create(&dbp[i], dbenv, 0); - if (ret) { - syslog(LOG_EMERG, "db_create: %s\n", db_strerror(ret)); - syslog(LOG_EMERG, "exit code %d\n", ret); - exit(CTDLEXIT_DB); - } - - - /* Arbitrary names for our tables -- we reference them by - * number, so we don't have string names for them. - */ - snprintf(dbfilename, sizeof dbfilename, "cdb.%02x", i); - - ret = dbp[i]->open(dbp[i], - NULL, - dbfilename, - NULL, - DB_BTREE, - DB_CREATE | DB_AUTO_COMMIT | DB_THREAD, - 0600 - ); - if (ret) { - syslog(LOG_EMERG, "db_open[%02x]: %s\n", i, db_strerror(ret)); - if (ret == ENOMEM) { - syslog(LOG_EMERG, "You may need to tune your database; please read http://www.citadel.org/doku.php?id=faq:troubleshooting:out_of_lock_entries for more information."); - } - syslog(LOG_EMERG, "exit code %d\n", ret); - exit(CTDLEXIT_DB); - } - } - -} - - -/* Make sure we own all the files, because in a few milliseconds - * we're going to drop root privs. - */ -void cdb_chmod_data(void) { - DIR *dp; - struct dirent *d; - char filename[PATH_MAX]; - - dp = opendir(ctdl_data_dir); - if (dp != NULL) { - while (d = readdir(dp), d != NULL) { - if (d->d_name[0] != '.') { - snprintf(filename, sizeof filename, - "%s/%s", ctdl_data_dir, d->d_name); - syslog(LOG_DEBUG, "chmod(%s, 0600) returned %d\n", - filename, chmod(filename, 0600) - ); - syslog(LOG_DEBUG, "chown(%s, CTDLUID, -1) returned %d\n", - filename, chown(filename, CTDLUID, (-1)) - ); - } - } - closedir(dp); - } - - syslog(LOG_DEBUG, "open_databases() finished\n"); -} - - -/* - * Close all of the db database files we've opened. This can be done - * in a loop, since it's just a bunch of closes. - */ -void close_databases(void) -{ - int a; - int ret; - - if ((ret = dbenv->txn_checkpoint(dbenv, 0, 0, 0))) { - syslog(LOG_EMERG, - "txn_checkpoint: %s\n", db_strerror(ret)); - } - - /* print some statistics... */ -#ifdef DB_STAT_ALL - dbenv->lock_stat_print(dbenv, DB_STAT_ALL); -#endif - - /* close the tables */ - for (a = 0; a < MAXCDB; ++a) { - syslog(LOG_INFO, "Closing database %02x\n", a); - ret = dbp[a]->close(dbp[a], 0); - if (ret) { - syslog(LOG_EMERG, "db_close: %s\n", db_strerror(ret)); - } - - } - - /* Close the handle. */ - ret = dbenv->close(dbenv, 0); - if (ret) { - syslog(LOG_EMERG, "DBENV->close: %s\n", db_strerror(ret)); - } -} - - -/* - * Decompress a database item if it was compressed on disk - */ -void cdb_decompress_if_necessary(struct cdbdata *cdb) -{ - static int magic = COMPRESS_MAGIC; - - if ((cdb == NULL) || - (cdb->ptr == NULL) || - (cdb->len < sizeof(magic)) || - (memcmp(cdb->ptr, &magic, sizeof(magic)))) - return; - - /* At this point we know we're looking at a compressed item. */ - - struct CtdlCompressHeader zheader; - char *uncompressed_data; - char *compressed_data; - uLongf destLen, sourceLen; - size_t cplen; - - memset(&zheader, 0, sizeof(struct CtdlCompressHeader)); - cplen = sizeof(struct CtdlCompressHeader); - if (sizeof(struct CtdlCompressHeader) > cdb->len) - cplen = cdb->len; - memcpy(&zheader, cdb->ptr, cplen); - - compressed_data = cdb->ptr; - compressed_data += sizeof(struct CtdlCompressHeader); - - sourceLen = (uLongf) zheader.compressed_len; - destLen = (uLongf) zheader.uncompressed_len; - uncompressed_data = malloc(zheader.uncompressed_len); - - if (uncompress((Bytef *) uncompressed_data, - (uLongf *) & destLen, - (const Bytef *) compressed_data, - (uLong) sourceLen) != Z_OK) { - syslog(LOG_EMERG, "uncompress() error\n"); - cdb_abort(); - } - - free(cdb->ptr); - cdb->len = (size_t) destLen; - cdb->ptr = uncompressed_data; -} - - - -/* - * Store a piece of data. Returns 0 if the operation was successful. If a - * key already exists it should be overwritten. - */ -int cdb_store(int cdb, const void *ckey, int ckeylen, void *cdata, int cdatalen) -{ - - DBT dkey, ddata; - DB_TXN *tid; - int ret = 0; - - struct CtdlCompressHeader zheader; - char *compressed_data = NULL; - int compressing = 0; - size_t buffer_len = 0; - uLongf destLen = 0; - - memset(&dkey, 0, sizeof(DBT)); - memset(&ddata, 0, sizeof(DBT)); - dkey.size = ckeylen; - /* no, we don't care for this error. */ - dkey.data = ckey; - - ddata.size = cdatalen; - ddata.data = cdata; - - /* Only compress Visit records. Everything else is uncompressed. */ - if (cdb == CDB_VISIT) { - compressing = 1; - zheader.magic = COMPRESS_MAGIC; - zheader.uncompressed_len = cdatalen; - buffer_len = ((cdatalen * 101) / 100) + 100 - + sizeof(struct CtdlCompressHeader); - destLen = (uLongf) buffer_len; - compressed_data = malloc(buffer_len); - if (compress2((Bytef *) (compressed_data + sizeof(struct CtdlCompressHeader)), - &destLen, (Bytef *) cdata, (uLongf) cdatalen, 1) != Z_OK) - { - syslog(LOG_EMERG, "compress2() error\n"); - cdb_abort(); - } - zheader.compressed_len = (size_t) destLen; - memcpy(compressed_data, &zheader, sizeof(struct CtdlCompressHeader)); - ddata.size = (size_t) (sizeof(struct CtdlCompressHeader) + zheader.compressed_len); - ddata.data = compressed_data; - } - - if (TSD->tid != NULL) { - ret = dbp[cdb]->put(dbp[cdb], /* db */ - TSD->tid, /* transaction ID */ - &dkey, /* key */ - &ddata, /* data */ - 0); /* flags */ - if (ret) { - syslog(LOG_EMERG, "cdb_store(%d): %s", cdb, db_strerror(ret)); - cdb_abort(); - } - if (compressing) - free(compressed_data); - return ret; - - } else { - bailIfCursor(TSD->cursors, "attempt to write during r/o cursor"); - - retry: - txbegin(&tid); - - if ((ret = dbp[cdb]->put(dbp[cdb], /* db */ - tid, /* transaction ID */ - &dkey, /* key */ - &ddata, /* data */ - 0))) { /* flags */ - if (ret == DB_LOCK_DEADLOCK) { - txabort(tid); - goto retry; - } else { - syslog(LOG_EMERG, "cdb_store(%d): %s", cdb, db_strerror(ret)); - cdb_abort(); - } - } else { - txcommit(tid); - if (compressing) { - free(compressed_data); - } - return ret; - } - } - return ret; -} - - -/* - * Delete a piece of data. Returns 0 if the operation was successful. - */ -int cdb_delete(int cdb, void *key, int keylen) -{ - - DBT dkey; - DB_TXN *tid; - int ret; - - memset(&dkey, 0, sizeof dkey); - dkey.size = keylen; - dkey.data = key; - - if (TSD->tid != NULL) { - ret = dbp[cdb]->del(dbp[cdb], TSD->tid, &dkey, 0); - if (ret) { - syslog(LOG_EMERG, "cdb_delete(%d): %s\n", cdb, db_strerror(ret)); - if (ret != DB_NOTFOUND) { - cdb_abort(); - } - } - } else { - bailIfCursor(TSD->cursors, "attempt to delete during r/o cursor"); - - retry: - txbegin(&tid); - - if ((ret = dbp[cdb]->del(dbp[cdb], tid, &dkey, 0)) - && ret != DB_NOTFOUND) { - if (ret == DB_LOCK_DEADLOCK) { - txabort(tid); - goto retry; - } else { - syslog(LOG_EMERG, "cdb_delete(%d): %s\n", - cdb, db_strerror(ret)); - cdb_abort(); - } - } else { - txcommit(tid); - } - } - return ret; -} - -static DBC *localcursor(int cdb) -{ - int ret; - DBC *curs; - - if (TSD->cursors[cdb] == NULL) - ret = dbp[cdb]->cursor(dbp[cdb], TSD->tid, &curs, 0); - else - ret = TSD->cursors[cdb]->c_dup(TSD->cursors[cdb], &curs, DB_POSITION); - - if (ret) { - syslog(LOG_EMERG, "localcursor: %s\n", db_strerror(ret)); - cdb_abort(); - } - - return curs; -} - - -/* - * Fetch a piece of data. If not found, returns NULL. Otherwise, it returns - * a struct cdbdata which it is the caller's responsibility to free later on - * using the cdb_free() routine. - */ -struct cdbdata *cdb_fetch(int cdb, const void *key, int keylen) -{ - struct cdbdata *tempcdb; - DBT dkey, dret; - int ret; - - memset(&dkey, 0, sizeof(DBT)); - dkey.size = keylen; - /* no we don't care about this error. */ - dkey.data = key; - - if (TSD->tid != NULL) { - memset(&dret, 0, sizeof(DBT)); - dret.flags = DB_DBT_MALLOC; - ret = dbp[cdb]->get(dbp[cdb], TSD->tid, &dkey, &dret, 0); - } else { - DBC *curs; - - do { - memset(&dret, 0, sizeof(DBT)); - dret.flags = DB_DBT_MALLOC; - - curs = localcursor(cdb); - - ret = curs->c_get(curs, &dkey, &dret, DB_SET); - cclose(curs); - } - while (ret == DB_LOCK_DEADLOCK); - - } - - if ((ret != 0) && (ret != DB_NOTFOUND)) { - syslog(LOG_EMERG, "cdb_fetch(%d): %s\n", cdb, db_strerror(ret)); - cdb_abort(); - } - - if (ret != 0) - return NULL; - tempcdb = (struct cdbdata *) malloc(sizeof(struct cdbdata)); - - if (tempcdb == NULL) { - syslog(LOG_EMERG, "cdb_fetch: Cannot allocate memory for tempcdb\n"); - cdb_abort(); - return NULL; /* make it easier for static analysis... */ - } - else - { - tempcdb->len = dret.size; - tempcdb->ptr = dret.data; - cdb_decompress_if_necessary(tempcdb); - return (tempcdb); - } -} - - -/* - * Free a cdbdata item. - * - * Note that we only free the 'ptr' portion if it is not NULL. This allows - * other code to assume ownership of that memory simply by storing the - * pointer elsewhere and then setting 'ptr' to NULL. cdb_free() will then - * avoid freeing it. - */ -void cdb_free(struct cdbdata *cdb) -{ - if (cdb->ptr) { - free(cdb->ptr); - } - free(cdb); -} - -void cdb_close_cursor(int cdb) -{ - if (TSD->cursors[cdb] != NULL) { - cclose(TSD->cursors[cdb]); - } - - TSD->cursors[cdb] = NULL; -} - -/* - * Prepare for a sequential search of an entire database. - * (There is guaranteed to be no more than one traversal in - * progress per thread at any given time.) - */ -void cdb_rewind(int cdb) -{ - int ret = 0; - - if (TSD->cursors[cdb] != NULL) { - syslog(LOG_EMERG, - "cdb_rewind: must close cursor on database %d before reopening.\n", cdb); - cdb_abort(); - /* cclose(TSD->cursors[cdb]); */ - } - - /* - * Now initialize the cursor - */ - ret = dbp[cdb]->cursor(dbp[cdb], TSD->tid, &TSD->cursors[cdb], 0); - if (ret) { - syslog(LOG_EMERG, "cdb_rewind: db_cursor: %s\n", db_strerror(ret)); - cdb_abort(); - } -} - - -/* - * Fetch the next item in a sequential search. Returns a pointer to a - * cdbdata structure, or NULL if we've hit the end. - */ -struct cdbdata *cdb_next_item(int cdb) -{ - DBT key, data; - struct cdbdata *cdbret; - int ret = 0; - - /* Initialize the key/data pair so the flags aren't set. */ - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - data.flags = DB_DBT_MALLOC; - - ret = TSD->cursors[cdb]->c_get(TSD->cursors[cdb], &key, &data, DB_NEXT); - - if (ret) { - if (ret != DB_NOTFOUND) { - syslog(LOG_EMERG, "cdb_next_item(%d): %s\n", cdb, db_strerror(ret)); - cdb_abort(); - } - cdb_close_cursor(cdb); - return NULL; /* presumably, end of file */ - } - - cdbret = (struct cdbdata *) malloc(sizeof(struct cdbdata)); - cdbret->len = data.size; - cdbret->ptr = data.data; - cdb_decompress_if_necessary(cdbret); - - return (cdbret); -} - - - -/* - * Transaction-based stuff. I'm writing this as I bake cookies... - */ - -void cdb_begin_transaction(void) -{ - - bailIfCursor(TSD->cursors, "can't begin transaction during r/o cursor"); - - if (TSD->tid != NULL) { - syslog(LOG_EMERG, "cdb_begin_transaction: ERROR: nested transaction\n"); - cdb_abort(); - } - - txbegin(&TSD->tid); -} - -void cdb_end_transaction(void) -{ - int i; - - for (i = 0; i < MAXCDB; i++) - if (TSD->cursors[i] != NULL) { - syslog(LOG_WARNING, - "cdb_end_transaction: WARNING: cursor %d still open at transaction end\n", - i); - cclose(TSD->cursors[i]); - TSD->cursors[i] = NULL; - } - - if (TSD->tid == NULL) { - syslog(LOG_EMERG, - "cdb_end_transaction: ERROR: txcommit(NULL) !!\n"); - cdb_abort(); - } else { - txcommit(TSD->tid); - } - - TSD->tid = NULL; -} - -/* - * Truncate (delete every record) - */ -void cdb_trunc(int cdb) -{ - /* DB_TXN *tid; */ - int ret; - u_int32_t count; - - if (TSD->tid != NULL) { - syslog(LOG_EMERG, "cdb_trunc must not be called in a transaction."); - cdb_abort(); - } else { - bailIfCursor(TSD->cursors, "attempt to write during r/o cursor"); - - retry: - /* txbegin(&tid); */ - - if ((ret = dbp[cdb]->truncate(dbp[cdb], /* db */ - NULL, /* transaction ID */ - &count, /* #rows deleted */ - 0))) { /* flags */ - if (ret == DB_LOCK_DEADLOCK) { - /* txabort(tid); */ - goto retry; - } else { - syslog(LOG_EMERG, "cdb_truncate(%d): %s\n", cdb, db_strerror(ret)); - if (ret == ENOMEM) { - syslog(LOG_EMERG, "You may need to tune your database; please read http://www.citadel.org/doku.php?id=faq:troubleshooting:out_of_lock_entries for more information."); - } - exit(CTDLEXIT_DB); - } - } else { - /* txcommit(tid); */ - } - } -} - -int SeentDebugEnabled = 0; - -#define DBGLOG(LEVEL) if ((LEVEL != LOG_DEBUG) || (SeentDebugEnabled != 0)) -#define SEENM_syslog(LEVEL, FORMAT) \ - DBGLOG(LEVEL) syslog(LEVEL, \ - "IO[%ld]CC[%ld] SEEN[%s][%d] " FORMAT, \ - ioid, ccid, Facility, cType) - -time_t CheckIfAlreadySeen(const char *Facility, - StrBuf *guid, - time_t now, - time_t antiexpire, - eCheckType cType, - long ccid, - long ioid) -{ - time_t InDBTimeStamp = 0; - struct UseTable ut; - struct cdbdata *cdbut; - - if (cType != eWrite) - { - SEENM_syslog(LOG_DEBUG, "Loading"); - cdbut = cdb_fetch(CDB_USETABLE, SKEY(guid)); - if ((cdbut != NULL) && (cdbut->ptr != NULL)) { - memcpy(&ut, cdbut->ptr, - ((cdbut->len > sizeof(struct UseTable)) ? - sizeof(struct UseTable) : cdbut->len)); - InDBTimeStamp = ut.ut_timestamp; - - if (InDBTimeStamp < antiexpire) - { - SEENM_syslog(LOG_DEBUG, "Found - Not expired."); - cdb_free(cdbut); - return InDBTimeStamp; - } - else - { - SEENM_syslog(LOG_DEBUG, "Found - Expired."); - InDBTimeStamp = ut.ut_timestamp; - cdb_free(cdbut); - } - } - else - { - SEENM_syslog(LOG_DEBUG, "not Found"); - } - - if (cType == eCheckExist) - return InDBTimeStamp; - } - - memcpy(ut.ut_msgid, SKEY(guid)); - ut.ut_timestamp = now; - - SEENM_syslog(LOG_DEBUG, "Saving"); - /* rewrite the record anyway, to update the timestamp */ - cdb_store(CDB_USETABLE, - SKEY(guid), - &ut, sizeof(struct UseTable) ); - - SEENM_syslog(LOG_DEBUG, "Done Saving"); - return InDBTimeStamp; -} - - -void LogDebugEnableSeenEnable(const int n) -{ - SeentDebugEnabled = n; -} - -CTDL_MODULE_INIT(database) -{ - if (!threading) - { - CtdlRegisterDebugFlagHook(HKEY("SeenDebug"), LogDebugEnableSeenEnable, &SeentDebugEnabled); - } - - /* return our module id for the log */ - return "database"; -}