+++ /dev/null
-// This is a data store backend for the Citadel server which uses Berkeley DB.
-//
-// Copyright (c) 1987-2021 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 <stdlib.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include <stdio.h>
-#include <dirent.h>
-#include <zlib.h>
-#include <db.h>
-
-#if DB_VERSION_MAJOR < 5
-#error Citadel requires Berkeley DB v5.0 or newer. Please upgrade.
-#endif
-
-#include <libcitadel.h>
-#include "ctdl_module.h"
-#include "control.h"
-#include "citserver.h"
-#include "config.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, "db: citserver is stopping in order to prevent data loss. uid=%d gid=%d euid=%d egid=%d",
- getuid(), getgid(), geteuid(), getegid()
- );
- 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);
- }
-}
-
-
-/* Verbose logging callback */
-void cdb_verbose_err(const DB_ENV * dbenv, const char *errpfx, const char *msg) {
- syslog(LOG_ERR, "db: %s", msg);
-}
-
-
-/* wrapper for txn_abort() that logs/aborts on error */
-static void txabort(DB_TXN *tid) {
- int ret;
-
- ret = tid->abort(tid);
-
- if (ret) {
- syslog(LOG_ERR, "db: txn_abort: %s", db_strerror(ret));
- cdb_abort();
- }
-}
-
-
-/* wrapper for txn_commit() that logs/aborts on error */
-static void txcommit(DB_TXN *tid) {
- int ret;
-
- ret = tid->commit(tid, 0);
-
- if (ret) {
- syslog(LOG_ERR, "db: txn_commit: %s", db_strerror(ret));
- cdb_abort();
- }
-}
-
-
-/* wrapper for txn_begin() that logs/aborts on error */
-static void txbegin(DB_TXN **tid) {
- int ret;
-
- ret = dbenv->txn_begin(dbenv, NULL, tid, 0);
-
- if (ret) {
- syslog(LOG_ERR, "db: txn_begin: %s", db_strerror(ret));
- cdb_abort();
- }
-}
-
-
-/* panic callback */
-static void dbpanic(DB_ENV * env, int errval) {
- syslog(LOG_ERR, "db: PANIC: %s", db_strerror(errval));
-}
-
-
-static void cclose(DBC * cursor) {
- int ret;
-
- if ((ret = cursor->c_close(cursor))) {
- syslog(LOG_ERR, "db: 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_ERR, "db: 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_ERR, "db: transaction still in progress!");
- cdb_abort();
- }
-}
-
-
-/*
- * 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_ERR, "db: cdb_checkpoint() txn_checkpoint: %s", db_strerror(ret));
- cdb_abort();
- }
-
- /* After a successful checkpoint, we can cull the unused logs */
- if (CtdlGetConfigInt("c_auto_cull")) {
- ret = dbenv->log_set_config(dbenv, DB_LOG_AUTO_REMOVE, 1);
- }
- else {
- ret = dbenv->log_set_config(dbenv, DB_LOG_AUTO_REMOVE, 0);
- }
-}
-
-
-/*
- * 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;
-
- syslog(LOG_DEBUG, "db: open_databases() starting");
- syslog(LOG_DEBUG, "db: Compiled libdb: %s", DB_VERSION_STRING);
- syslog(LOG_DEBUG, "db: Linked libdb: %s", db_version(&dbversion_major, &dbversion_minor, &dbversion_patch));
- syslog(LOG_DEBUG, "db: Linked zlib: %s", zlibVersion());
-
- /*
- * Silently try to create the database subdirectory. If it's already there, no problem.
- */
- if ((mkdir(ctdl_db_dir, 0700) != 0) && (errno != EEXIST)) {
- syslog(LOG_ERR, "db: unable to create database directory [%s]: %m", ctdl_db_dir);
- }
- if (chmod(ctdl_db_dir, 0700) != 0) {
- syslog(LOG_ERR, "db: unable to set database directory permissions [%s]: %m", ctdl_db_dir);
- }
- if (chown(ctdl_db_dir, CTDLUID, (-1)) != 0) {
- syslog(LOG_ERR, "db: unable to set the owner for [%s]: %m", ctdl_db_dir);
- }
- syslog(LOG_DEBUG, "db: Setting up DB environment");
- // db_env_set_func_yield((int (*)(u_long, u_long))sched_yield);
- ret = db_env_create(&dbenv, 0);
- if (ret) {
- syslog(LOG_ERR, "db: db_env_create: %s", db_strerror(ret));
- syslog(LOG_ERR, "db: exit code %d", 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");
- dbenv->set_msgcall(dbenv, cdb_verbose_log);
- 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_ERR, "db: set_cachesize: %s", db_strerror(ret));
- dbenv->close(dbenv, 0);
- syslog(LOG_ERR, "db: exit code %d", ret);
- exit(CTDLEXIT_DB);
- }
-
- if ((ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT))) {
- syslog(LOG_ERR, "db: set_lk_detect: %s", db_strerror(ret));
- dbenv->close(dbenv, 0);
- syslog(LOG_ERR, "db: exit code %d", ret);
- exit(CTDLEXIT_DB);
- }
-
- flags = DB_CREATE | DB_INIT_MPOOL | DB_PRIVATE | DB_INIT_TXN | DB_INIT_LOCK | DB_THREAD | DB_INIT_LOG;
- syslog(LOG_DEBUG, "db: dbenv->open(dbenv, %s, %d, 0)", ctdl_db_dir, flags);
- ret = dbenv->open(dbenv, ctdl_db_dir, flags, 0); // try opening the database cleanly
- if (ret == DB_RUNRECOVERY) {
- syslog(LOG_ERR, "db: dbenv->open: %s", db_strerror(ret));
- syslog(LOG_ERR, "db: attempting recovery...");
- flags |= DB_RECOVER;
- ret = dbenv->open(dbenv, ctdl_db_dir, flags, 0); // try recovery
- }
- if (ret == DB_RUNRECOVERY) {
- syslog(LOG_ERR, "db: dbenv->open: %s", db_strerror(ret));
- syslog(LOG_ERR, "db: attempting catastrophic recovery...");
- flags &= ~DB_RECOVER;
- flags |= DB_RECOVER_FATAL;
- ret = dbenv->open(dbenv, ctdl_db_dir, flags, 0); // try catastrophic recovery
- }
- if (ret) {
- syslog(LOG_ERR, "db: dbenv->open: %s", db_strerror(ret));
- dbenv->close(dbenv, 0);
- syslog(LOG_ERR, "db: exit code %d", ret);
- exit(CTDLEXIT_DB);
- }
-
- syslog(LOG_INFO, "db: mounting databases");
- for (i = 0; i < MAXCDB; ++i) {
- ret = db_create(&dbp[i], dbenv, 0); // Create a database handle
- if (ret) {
- syslog(LOG_ERR, "db: db_create: %s", db_strerror(ret));
- syslog(LOG_ERR, "db: exit code %d", ret);
- exit(CTDLEXIT_DB);
- }
-
- snprintf(dbfilename, sizeof dbfilename, "cdb.%02x", i); // table names by number
- ret = dbp[i]->open(dbp[i], NULL, dbfilename, NULL, DB_BTREE, DB_CREATE | DB_AUTO_COMMIT | DB_THREAD, 0600);
- if (ret) {
- syslog(LOG_ERR, "db: db_open[%02x]: %s", i, db_strerror(ret));
- if (ret == ENOMEM) {
- syslog(LOG_ERR, "db: 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_ERR, "db: exit code %d", 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_db_dir);
- if (dp != NULL) {
- while (d = readdir(dp), d != NULL) {
- if (d->d_name[0] != '.') {
- snprintf(filename, sizeof filename, "%s/%s", ctdl_db_dir, d->d_name);
- syslog(LOG_DEBUG, "db: chmod(%s, 0600) returned %d", filename, chmod(filename, 0600));
- syslog(LOG_DEBUG, "db: chown(%s, CTDLUID, -1) returned %d",
- filename, chown(filename, CTDLUID, (-1))
- );
- }
- }
- closedir(dp);
- }
-}
-
-
-/*
- * 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 i;
- int ret;
-
- syslog(LOG_INFO, "db: performing final checkpoint");
- if ((ret = dbenv->txn_checkpoint(dbenv, 0, 0, 0))) {
- syslog(LOG_ERR, "db: txn_checkpoint: %s", db_strerror(ret));
- }
-
- syslog(LOG_INFO, "db: flushing the database logs");
- if ((ret = dbenv->log_flush(dbenv, NULL))) {
- syslog(LOG_ERR, "db: log_flush: %s", db_strerror(ret));
- }
-
- /* close the tables */
- syslog(LOG_INFO, "db: closing databases");
- for (i = 0; i < MAXCDB; ++i) {
- syslog(LOG_INFO, "db: closing database %02x", i);
- ret = dbp[i]->close(dbp[i], 0);
- if (ret) {
- syslog(LOG_ERR, "db: db_close: %s", db_strerror(ret));
- }
-
- }
-
- // This seemed nifty at the time but did anyone really look at it?
- // #ifdef DB_STAT_ALL
- // /* print some statistics... */
- // dbenv->lock_stat_print(dbenv, DB_STAT_ALL);
- // #endif
-
- /* Close the handle. */
- ret = dbenv->close(dbenv, 0);
- if (ret) {
- syslog(LOG_ERR, "db: DBENV->close: %s", 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_ERR, "db: uncompress() error");
- 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 = NULL;
- 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;
- dkey.data = (void *) ckey;
- ddata.size = cdatalen;
- ddata.data = cdata;
-
- /* Only compress Visit and UseTable records. Everything else is uncompressed. */
- if ((cdb == CDB_VISIT) || (cdb == CDB_USETABLE)) {
- 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_ERR, "db: compress2() error");
- 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_ERR, "db: 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_ERR, "db: 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_ERR, "db: cdb_delete(%d): %s", 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_ERR, "db: cdb_delete(%d): %s", 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_ERR, "db: localcursor: %s", 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) {
-
- if (keylen == 0) { // key length zero is impossible
- return(NULL);
- }
-
- struct cdbdata *tempcdb;
- DBT dkey, dret;
- int ret;
-
- memset(&dkey, 0, sizeof(DBT));
- dkey.size = keylen;
- dkey.data = (void *) 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_ERR, "db: cdb_fetch(%d): %s", cdb, db_strerror(ret));
- cdb_abort();
- }
-
- if (ret != 0) {
- return NULL;
- }
-
- tempcdb = (struct cdbdata *) malloc(sizeof(struct cdbdata));
- if (tempcdb == NULL) {
- syslog(LOG_ERR, "db: cdb_fetch() cannot allocate memory for tempcdb: %m");
- 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_ERR, "db: cdb_rewind: must close cursor on database %d before reopening", 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_ERR, "db: cdb_rewind: db_cursor: %s", 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_ERR, "db: cdb_next_item(%d): %s", 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_ERR, "db: cdb_begin_transaction: ERROR: nested transaction");
- 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, "db: cdb_end_transaction: WARNING: cursor %d still open at transaction end", i);
- cclose(TSD->cursors[i]);
- TSD->cursors[i] = NULL;
- }
- }
-
- if (TSD->tid == NULL) {
- syslog(LOG_ERR, "db: cdb_end_transaction: ERROR: txcommit(NULL) !!");
- 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_ERR, "db: 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_ERR, "db: cdb_truncate(%d): %s", cdb, db_strerror(ret));
- if (ret == ENOMEM) {
- syslog(LOG_ERR, "db: 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); */
- }
- }
-}
-
-
-// compact (defragment) the database, possibly returning space back to the underlying filesystem
-void cdb_compact(void) {
- int ret;
- int i;
-
- syslog(LOG_DEBUG, "db: cdb_compact() started");
- for (i = 0; i < MAXCDB; i++) {
- syslog(LOG_DEBUG, "db: compacting database %d", i);
- ret = dbp[i]->compact(dbp[i], NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
- if (ret) {
- syslog(LOG_ERR, "db: compact: %s", db_strerror(ret));
- }
- }
- syslog(LOG_DEBUG, "db: cdb_compact() finished");
-}
-
-
-// Has an item already been seen (is it in the CDB_USETABLE) ?
-// Returns 0 if it hasn't, 1 if it has
-// In either case, writes the item to the database for next time.
-int CheckIfAlreadySeen(StrBuf *guid) {
- int found = 0;
- struct UseTable ut;
- struct cdbdata *cdbut;
-
- syslog(LOG_DEBUG, "db: CheckIfAlreadySeen(%s)", ChrPtr(guid));
- cdbut = cdb_fetch(CDB_USETABLE, SKEY(guid));
- if (cdbut != NULL) {
- found = 1;
- cdb_free(cdbut);
- }
-
- /* (Re)write the record, to update the timestamp. Zeroing it out makes it compress better. */
- memset(&ut, 0, sizeof(struct UseTable));
- memcpy(ut.ut_msgid, SKEY(guid));
- ut.ut_timestamp = time(NULL);
- cdb_store(CDB_USETABLE, SKEY(guid), &ut, sizeof(struct UseTable));
- return (found);
-}
-
-
-CTDL_MODULE_INIT(database)
-{
- if (!threading) {
- // nothing to do here
- }
-
- /* return our module id for the log */
- return "database";
-}
projects / citadel.git / blobdiff