/*
* $Id$
*
- * Sleepycat (Berkeley) DB driver for Citadel/UX
+ * Sleepycat (Berkeley) DB driver for Citadel
*
*/
* 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 0
+#define MAX_CHECKPOINT_KBYTES 256
#define MAX_CHECKPOINT_MINUTES 15
/*****************************************************************************/
+#ifdef DLL_EXPORT
+#define IN_LIBCIT
+#endif
+
#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
+
+#ifdef HAVE_DB_H
#include <db.h>
+#elif defined(HAVE_DB4_DB_H)
+#include <db4/db.h>
+#else
+#error Neither <db.h> nor <db4/db.h> 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 <pthread.h>
#include "citadel.h"
#include "server.h"
+#include "serv_extensions.h"
#include "citserver.h"
#include "database.h"
+#include "msgbase.h"
#include "sysdep_decls.h"
-#include "dynloader.h"
+#include "config.h"
-DB *dbp[MAXCDB]; /* One DB handle for each Citadel database */
-DB_ENV *dbenv; /* The DB environment (global) */
+static DB *dbp[MAXCDB]; /* One DB handle for each Citadel database */
+static DB_ENV *dbenv; /* The DB environment (global) */
struct cdbtsd { /* Thread-specific DB stuff */
DB_TXN *tid; /* Transaction handle */
DBC *cursors[MAXCDB]; /* Cursors, for traversals... */
};
-int num_ssd = 0;
+#ifdef HAVE_ZLIB
+#include <zlib.h>
+#endif
static pthread_key_t tsdkey;
/* just a little helper function */
static void txabort(DB_TXN *tid) {
- int ret = txn_abort(tid);
+ int ret;
+
+ ret = tid->abort(tid);
if (ret) {
- lprintf(1, "cdb_*: txn_abort: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: txn_abort: %s\n", db_strerror(ret));
abort();
}
}
/* this one is even more helpful than the last. */
static void txcommit(DB_TXN *tid) {
- int ret = txn_commit(tid, 0);
+ int ret;
+
+ ret = tid->commit(tid, 0);
if (ret) {
- lprintf(1, "cdb_*: txn_commit: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: txn_commit: %s\n", db_strerror(ret));
abort();
}
}
/* are you sensing a pattern yet? */
static void txbegin(DB_TXN **tid) {
- int ret = txn_begin(dbenv, NULL, tid, 0);
+ int ret;
+
+ ret = dbenv->txn_begin(dbenv, NULL, tid, 0);
if (ret) {
- lprintf(1, "cdb_*: txn_begin: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: txn_begin: %s\n", db_strerror(ret));
abort();
}
}
+static void dbpanic(DB_ENV* env, int errval)
+{
+ lprintf(CTDL_EMERG, "cdb_*: Berkeley DB panic: %d\n", errval);
+}
+
static void cclose(DBC *cursor) {
int ret;
if ((ret = cursor->c_close(cursor))) {
- lprintf(1, "cdb_*: c_close: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: c_close: %s\n", db_strerror(ret));
abort();
}
}
+static void bailIfCursor(DBC **cursors, const char *msg)
+{
+ int i;
+
+ for (i = 0; i < MAXCDB; i++)
+ if (cursors[i] != NULL)
+ {
+ lprintf(CTDL_EMERG, "cdb_*: cursor still in progress on cdb %d: %s\n", i, msg);
+ abort();
+ }
+}
+
static void check_handles(void *arg) {
if (arg != NULL) {
struct cdbtsd *tsd = (struct cdbtsd *)arg;
- int i;
- for (i = 0; i < MAXCDB; i++)
- if (tsd->cursors[i] != NULL)
- {
- lprintf(1, "cdb_*: cursor still in progress on cdb %d!", i);
- abort();
- }
+ bailIfCursor(tsd->cursors, "in check_handles");
if (tsd->tid != NULL) {
- lprintf(1, "cdb_*: transaction still in progress!");
+ lprintf(CTDL_EMERG, "cdb_*: transaction still in progress!");
abort();
}
}
static void dest_tsd(void *arg) {
if (arg != NULL) {
check_handles(arg);
- phree(arg);
+ free(arg);
}
}
if (pthread_getspecific(tsdkey) != NULL)
return;
- tsd = mallok(sizeof *tsd);
+ tsd = malloc(sizeof(struct cdbtsd));
tsd->tid = NULL;
/*
* Cull the database logs
*/
-void cdb_cull_logs(void) {
- DIR *dp;
- struct dirent *d;
- char filename[SIZ];
- struct stat statbuf;
+static void cdb_cull_logs(void) {
+ u_int32_t flags;
+ int ret;
+ char **file, **list;
+ char errmsg[SIZ];
- lprintf(5, "Database log file cull started.\n");
+ lprintf(CTDL_INFO, "Database log file cull started.\n");
- dp = opendir("data");
- if (dp == NULL) return;
+ flags = DB_ARCH_ABS;
- while (d = readdir(dp), d != NULL) {
- if (!strncasecmp(d->d_name, "log.", 4)) {
- sprintf(filename, "./data/%s", d->d_name);
- stat(filename, &statbuf);
- if ((time(NULL) - statbuf.st_mtime) > 432000L) {
- lprintf(5, "%s ... deleted\n", filename);
- unlink(filename);
- }
- else {
- lprintf(5, "%s ... kept\n", filename);
+ /* Get the list of names. */
+ if ((ret = dbenv->log_archive(dbenv, &list, flags)) != 0) {
+ lprintf(CTDL_ERR, "cdb_cull_logs: %s\n", db_strerror(ret));
+ return;
+ }
+
+ /* Print the list of names. */
+ if (list != NULL) {
+ for (file = list; *file != NULL; ++file) {
+ lprintf(CTDL_DEBUG, "Deleting log: %s\n", *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));
+ aide_message(errmsg);
}
}
+ free(list);
}
- closedir(dp);
-
- lprintf(5, "Database log file cull ended.\n");
+ lprintf(CTDL_INFO, "Database log file cull ended.\n");
}
int ret;
static time_t last_cull = 0L;
- ret = txn_checkpoint(dbenv,
+ ret = dbenv->txn_checkpoint(dbenv,
MAX_CHECKPOINT_KBYTES,
MAX_CHECKPOINT_MINUTES,
0);
- if (ret) {
- lprintf(1, "cdb_checkpoint: txn_checkpoint: %s\n", db_strerror(ret));
+
+ if (ret != 0) {
+ lprintf(CTDL_EMERG, "cdb_checkpoint: txn_checkpoint: %s\n",
+ db_strerror(ret));
abort();
}
-
/* Cull the logs if we haven't done so for 24 hours */
if ((time(NULL) - last_cull) > 86400L) {
last_cull = time(NULL);
/*
* Open the various databases we'll be using. Any database which
- * does not exist should be created. Note that we don't need an S_DATABASE
- * critical section here, because there aren't any active threads manipulating
- * the database yet -- and besides, it causes problems on BSDI.
+ * 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 i;
char dbfilename[SIZ];
u_int32_t flags = 0;
+ char dbdirname[PATH_MAX];
+ DIR *dp;
+ struct dirent *d;
+ char filename[PATH_MAX];
+
+
+ getcwd(dbdirname, sizeof dbdirname);
+ strcat(dbdirname, "/data");
+
+ lprintf(CTDL_DEBUG, "cdb_*: open_databases() starting\n");
+ lprintf(CTDL_DEBUG, "Compiled db: %s\n", DB_VERSION_STRING);
+ lprintf(CTDL_INFO, " Linked db: %s\n", db_version(NULL, NULL, NULL));
+#ifdef HAVE_ZLIB
+ lprintf(CTDL_INFO, "Linked zlib: %s\n", zlibVersion());
+#endif
- lprintf(9, "cdb_*: open_databases() starting\n");
/*
* Silently try to create the database subdirectory. If it's
* already there, no problem.
*/
- system("exec mkdir data 2>/dev/null");
+ mkdir(dbdirname, 0700);
+ chmod(dbdirname, 0700);
+ chown(dbdirname, CTDLUID, (-1) );
- lprintf(9, "cdb_*: Setting up DB environment\n");
+ lprintf(CTDL_DEBUG, "cdb_*: Setting up DB environment\n");
db_env_set_func_yield(sched_yield);
ret = db_env_create(&dbenv, 0);
if (ret) {
- lprintf(1, "cdb_*: db_env_create: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: db_env_create: %s\n", db_strerror(ret));
exit(ret);
}
dbenv->set_errpfx(dbenv, "citserver");
+ dbenv->set_paniccall(dbenv, dbpanic);
/*
* We want to specify the shared memory buffer pool cachesize,
*/
ret = dbenv->set_cachesize(dbenv, 0, 64 * 1024, 0);
if (ret) {
- lprintf(1, "cdb_*: set_cachesize: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: set_cachesize: %s\n", db_strerror(ret));
dbenv->close(dbenv, 0);
exit(ret);
}
if ((ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT))) {
- lprintf(1, "cdb_*: set_lk_detect: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: set_lk_detect: %s\n", db_strerror(ret));
dbenv->close(dbenv, 0);
exit(ret);
}
flags = DB_CREATE|DB_RECOVER|DB_INIT_MPOOL|DB_PRIVATE|DB_INIT_TXN|
DB_INIT_LOCK|DB_THREAD;
- ret = dbenv->open(dbenv, "./data", flags, 0);
+ lprintf(CTDL_DEBUG, "dbenv->open(dbenv, %s, %d, 0)\n", dbdirname, flags);
+ ret = dbenv->open(dbenv, dbdirname, flags, 0);
if (ret) {
- lprintf(1, "cdb_*: dbenv->open: %s\n", db_strerror(ret));
+ lprintf(CTDL_DEBUG, "cdb_*: dbenv->open: %s\n", db_strerror(ret));
dbenv->close(dbenv, 0);
exit(ret);
}
- lprintf(7, "cdb_*: Starting up DB\n");
+ lprintf(CTDL_INFO, "cdb_*: Starting up DB\n");
for (i = 0; i < MAXCDB; ++i) {
/* Create a database handle */
ret = db_create(&dbp[i], dbenv, 0);
if (ret) {
- lprintf(1, "cdb_*: db_create: %s\n", db_strerror(ret));
+ lprintf(CTDL_DEBUG, "cdb_*: db_create: %s\n", db_strerror(ret));
exit(ret);
}
/* Arbitrary names for our tables -- we reference them by
* number, so we don't have string names for them.
*/
- sprintf(dbfilename, "cdb.%02x", i);
+ snprintf(dbfilename, sizeof dbfilename, "cdb.%02x", i);
ret = dbp[i]->open(dbp[i],
+ NULL,
dbfilename,
NULL,
DB_BTREE,
- DB_CREATE|DB_THREAD,
+ DB_CREATE|DB_AUTO_COMMIT|DB_THREAD
+ ,
0600);
if (ret) {
- lprintf(1, "cdb_*: db_open[%d]: %s\n", i, db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: db_open[%d]: %s\n", i, db_strerror(ret));
exit(ret);
}
}
if ((ret = pthread_key_create(&tsdkey, dest_tsd))) {
- lprintf(1, "cdb_*: pthread_key_create: %s\n", strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_*: pthread_key_create: %s\n", strerror(ret));
exit(1);
}
cdb_allocate_tsd();
CtdlRegisterSessionHook(cdb_checkpoint, EVT_TIMER);
- lprintf(9, "cdb_*: open_databases() finished\n");
+
+ /* Now make sure we own all the files, because in a few milliseconds
+ * we're going to drop root privs.
+ */
+ dp = opendir(dbdirname);
+ if (dp != NULL) {
+ while (d = readdir(dp), d != NULL) {
+ if (d->d_name[0] != '.') {
+ snprintf(filename, sizeof filename, "%s/%s",
+ dbdirname, d->d_name);
+ chmod(filename, 0600);
+ chown(filename, CTDLUID, (-1) );
+ }
+ }
+ closedir(dp);
+ }
+
+ lprintf(CTDL_DEBUG, "cdb_*: open_databases() finished\n");
}
cdb_free_tsd();
- if ((ret = txn_checkpoint(dbenv, 0, 0, 0))) {
- lprintf(1, "cdb_*: txn_checkpoint: %s\n", db_strerror(ret));
- abort();
+ if ((ret = dbenv->txn_checkpoint(dbenv, 0, 0, 0))) {
+ lprintf(CTDL_EMERG,
+ "cdb_*: txn_checkpoint: %s\n",
+ db_strerror(ret));
}
for (a = 0; a < MAXCDB; ++a) {
- lprintf(7, "cdb_*: Closing database %d\n", a);
+ lprintf(CTDL_INFO, "cdb_*: Closing database %d\n", a);
ret = dbp[a]->close(dbp[a], 0);
if (ret) {
- lprintf(1, "cdb_*: db_close: %s\n", db_strerror(ret));
- abort();
+ lprintf(CTDL_EMERG,
+ "cdb_*: db_close: %s\n",
+ db_strerror(ret));
}
}
/* Close the handle. */
ret = dbenv->close(dbenv, 0);
if (ret) {
- lprintf(1, "cdb_*: DBENV->close: %s\n", db_strerror(ret));
- abort();
+ lprintf(CTDL_EMERG,
+ "cdb_*: DBENV->close: %s\n",
+ db_strerror(ret));
}
}
+
+/*
+ * Compression functions only used if we have zlib
+ */
+#ifdef HAVE_ZLIB
+
+void cdb_decompress_if_necessary(struct cdbdata *cdb) {
+ static int magic = COMPRESS_MAGIC;
+ struct CtdlCompressHeader zheader;
+ char *uncompressed_data;
+ char *compressed_data;
+ uLongf destLen, sourceLen;
+
+ if (cdb == NULL) return;
+ if (cdb->ptr == NULL) return;
+ if (memcmp(cdb->ptr, &magic, sizeof(magic))) return;
+
+ /* At this point we know we're looking at a compressed item. */
+ memcpy(&zheader, cdb->ptr, sizeof(struct CtdlCompressHeader));
+
+ 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) {
+ lprintf(CTDL_EMERG, "uncompress() error\n");
+ abort();
+ }
+
+ free(cdb->ptr);
+ cdb->len = (size_t) destLen;
+ cdb->ptr = uncompressed_data;
+}
+
+#endif /* HAVE_ZLIB */
+
+
/*
* Store a piece of data. Returns 0 if the operation was successful. If a
* key already exists it should be overwritten.
void *cdata, int cdatalen)
{
- DBT dkey, ddata;
- DB_TXN *tid;
- int ret;
-
- memset(&dkey, 0, sizeof(DBT));
- memset(&ddata, 0, sizeof(DBT));
- dkey.size = ckeylen;
- dkey.data = ckey;
- ddata.size = cdatalen;
- ddata.data = cdata;
-
- if (MYTID != NULL) {
- ret = dbp[cdb]->put(dbp[cdb], /* db */
- MYTID, /* transaction ID */
- &dkey, /* key */
- &ddata, /* data */
- 0); /* flags */
- if (ret) {
- lprintf(1, "cdb_store(%d): %s\n", cdb,
- db_strerror(ret));
+ DBT dkey, ddata;
+ DB_TXN *tid;
+ int ret;
+
+#ifdef HAVE_ZLIB
+ struct CtdlCompressHeader zheader;
+ char *compressed_data = NULL;
+ int compressing = 0;
+ size_t buffer_len;
+ uLongf destLen;
+#endif
+
+ memset(&dkey, 0, sizeof(DBT));
+ memset(&ddata, 0, sizeof(DBT));
+ dkey.size = ckeylen;
+ dkey.data = ckey;
+ ddata.size = cdatalen;
+ ddata.data = cdata;
+
+#ifdef HAVE_ZLIB
+ /* 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) {
+ lprintf(CTDL_EMERG, "compress2() error\n");
abort();
}
- return ret;
- } else {
- 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 {
- lprintf(1, "cdb_store(%d): %s\n", cdb,
- db_strerror(ret));
- abort();
- }
- } else {
- txcommit(tid);
- return ret;
- }
+ 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;
}
+#endif
+
+ if (MYTID != NULL)
+ {
+ ret = dbp[cdb]->put(dbp[cdb], /* db */
+ MYTID, /* transaction ID */
+ &dkey, /* key */
+ &ddata, /* data */
+ 0); /* flags */
+ if (ret)
+ {
+ lprintf(CTDL_EMERG, "cdb_store(%d): %s\n", cdb, db_strerror(ret));
+ abort();
+ }
+#ifdef HAVE_ZLIB
+ if (compressing) free(compressed_data);
+#endif
+ return ret;
+
+ }
+ else
+ {
+ bailIfCursor(MYCURSORS, "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
+ {
+ lprintf(CTDL_EMERG, "cdb_store(%d): %s\n", cdb, db_strerror(ret));
+ abort();
+ }
+ }
+ else
+ {
+ txcommit(tid);
+#ifdef HAVE_ZLIB
+ if (compressing) free(compressed_data);
+#endif
+ return ret;
+ }
+ }
}
int cdb_delete(int cdb, void *key, int keylen)
{
- DBT dkey;
- DB_TXN *tid;
- int ret;
+ DBT dkey;
+ DB_TXN *tid;
+ int ret;
- memset(&dkey, 0, sizeof dkey);
- dkey.size = keylen;
- dkey.data = key;
+ memset(&dkey, 0, sizeof dkey);
+ dkey.size = keylen;
+ dkey.data = key;
- if (MYTID != NULL) {
- ret = dbp[cdb]->del(dbp[cdb], MYTID, &dkey, 0);
- if (ret) {
- lprintf(1, "cdb_delete(%d): %s\n", cdb,
- db_strerror(ret));
- if (ret != DB_NOTFOUND)
- abort();
- }
- } else {
- 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 {
- lprintf(1, "cdb_delete(%d): %s\n", cdb,
- db_strerror(ret));
- abort();
- }
- } else {
- txcommit(tid);
- }
+ if (MYTID != NULL)
+ {
+ ret = dbp[cdb]->del(dbp[cdb], MYTID, &dkey, 0);
+ if (ret)
+ {
+ lprintf(CTDL_EMERG, "cdb_delete(%d): %s\n", cdb, db_strerror(ret));
+ if (ret != DB_NOTFOUND)
+ abort();
+ }
+ }
+ else
+ {
+ bailIfCursor(MYCURSORS, "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
+ {
+ lprintf(CTDL_EMERG, "cdb_delete(%d): %s\n", cdb, db_strerror(ret));
+ abort();
+ }
+ }
+ else
+ {
+ txcommit(tid);
}
- return ret;
+ }
+ return ret;
}
+static DBC *localcursor(int cdb)
+{
+ int ret;
+ DBC *curs;
+ if (MYCURSORS[cdb] == NULL)
+ ret = dbp[cdb]->cursor(dbp[cdb], MYTID, &curs, 0);
+ else
+ ret = MYCURSORS[cdb]->c_dup(MYCURSORS[cdb], &curs, DB_POSITION);
+
+ if (ret)
+ {
+ lprintf(CTDL_EMERG, "localcursor: %s\n", db_strerror(ret));
+ abort();
+ }
+
+ return curs;
+}
/*
struct cdbdata *cdb_fetch(int cdb, void *key, int keylen)
{
- struct cdbdata *tempcdb;
- DBT dkey, dret;
- int ret;
+ struct cdbdata *tempcdb;
+ DBT dkey, dret;
+ int ret;
- memset(&dkey, 0, sizeof(DBT));
- dkey.size = keylen;
- dkey.data = key;
+ memset(&dkey, 0, sizeof(DBT));
+ dkey.size = keylen;
+ dkey.data = key;
- if (MYTID != NULL) {
- memset(&dret, 0, sizeof(DBT));
- dret.flags = DB_DBT_MALLOC;
- ret = dbp[cdb]->get(dbp[cdb], MYTID, &dkey, &dret, 0);
- } else {
- retry:
- memset(&dret, 0, sizeof(DBT));
- dret.flags = DB_DBT_MALLOC;
+ if (MYTID != NULL)
+ {
+ memset(&dret, 0, sizeof(DBT));
+ dret.flags = DB_DBT_MALLOC;
+ ret = dbp[cdb]->get(dbp[cdb], MYTID, &dkey, &dret, 0);
+ }
+ else
+ {
+ DBC *curs;
- ret = dbp[cdb]->get(dbp[cdb], NULL, &dkey, &dret, 0);
+ do
+ {
+ memset(&dret, 0, sizeof(DBT));
+ dret.flags = DB_DBT_MALLOC;
- if (ret == DB_LOCK_DEADLOCK)
- goto retry;
+ curs = localcursor(cdb);
- if (ret && ret != DB_NOTFOUND)
- abort();
+ ret = curs->c_get(curs, &dkey, &dret, DB_SET);
+ cclose(curs);
}
+ while (ret == DB_LOCK_DEADLOCK);
- if ((ret != 0) && (ret != DB_NOTFOUND)) {
- lprintf(1, "cdb_fetch(%d): %s\n", cdb, db_strerror(ret));
- abort();
- }
- if (ret != 0) return NULL;
- tempcdb = (struct cdbdata *) mallok(sizeof(struct cdbdata));
- if (tempcdb == NULL) {
- lprintf(2, "cdb_fetch: Cannot allocate memory for tempcdb\n");
- abort();
- }
- tempcdb->len = dret.size;
- tempcdb->ptr = dret.data;
- return (tempcdb);
+ }
+
+ if ((ret != 0) && (ret != DB_NOTFOUND))
+ {
+ lprintf(CTDL_EMERG, "cdb_fetch(%d): %s\n", cdb, db_strerror(ret));
+ abort();
+ }
+
+ if (ret != 0) return NULL;
+ tempcdb = (struct cdbdata *) malloc(sizeof(struct cdbdata));
+
+ if (tempcdb == NULL)
+ {
+ lprintf(CTDL_EMERG, "cdb_fetch: Cannot allocate memory for tempcdb\n");
+ abort();
+ }
+
+ tempcdb->len = dret.size;
+ tempcdb->ptr = dret.data;
+#ifdef HAVE_ZLIB
+ cdb_decompress_if_necessary(tempcdb);
+#endif
+ return (tempcdb);
}
*/
void cdb_free(struct cdbdata *cdb)
{
- phree(cdb->ptr);
- phree(cdb);
+ free(cdb->ptr);
+ free(cdb);
}
+void cdb_close_cursor(int cdb)
+{
+ if (MYCURSORS[cdb] != NULL)
+ cclose(MYCURSORS[cdb]);
+
+ MYCURSORS[cdb] = NULL;
+}
/*
* Prepare for a sequential search of an entire database.
{
int ret = 0;
- if (MYCURSORS[cdb] != NULL)
- cclose(MYCURSORS[cdb]);
-
- if (MYTID == NULL) {
- lprintf(1, "cdb_rewind: ERROR: cursor use outside transaction\n");
+ if (MYCURSORS[cdb] != NULL) {
+ lprintf(CTDL_EMERG, "cdb_rewind: must close cursor on database %d before reopening.\n", cdb);
abort();
+ /* cclose(MYCURSORS[cdb]); */
}
/*
*/
ret = dbp[cdb]->cursor(dbp[cdb], MYTID, &MYCURSORS[cdb], 0);
if (ret) {
- lprintf(1, "cdb_rewind: db_cursor: %s\n", db_strerror(ret));
+ lprintf(CTDL_EMERG, "cdb_rewind: db_cursor: %s\n", db_strerror(ret));
abort();
}
}
if (ret) {
if (ret != DB_NOTFOUND) {
- lprintf(1, "cdb_next_item(%d): %s\n",
+ lprintf(CTDL_EMERG, "cdb_next_item(%d): %s\n",
cdb, db_strerror(ret));
abort();
}
return NULL; /* presumably, end of file */
}
- cdbret = (struct cdbdata *) mallok(sizeof(struct cdbdata));
+ cdbret = (struct cdbdata *) malloc(sizeof(struct cdbdata));
cdbret->len = data.size;
cdbret->ptr = data.data;
+#ifdef HAVE_ZLIB
+ cdb_decompress_if_necessary(cdbret);
+#endif
return (cdbret);
}
+
/*
* Transaction-based stuff. I'm writing this as I bake cookies...
*/
void cdb_begin_transaction(void) {
- /******** this check slows it down and is not needed except to debug
- if (MYTID != NULL) {
- lprintf(1, "cdb_begin_transaction: ERROR: opening a new transaction with one already open!\n");
- abort();
- }
- ***************************/
+ bailIfCursor(MYCURSORS, "can't begin transaction during r/o cursor");
+
+ if (MYTID != NULL)
+ {
+ lprintf(CTDL_EMERG, "cdb_begin_transaction: ERROR: nested transaction\n");
+ abort();
+ }
- txbegin(&MYTID);
+ txbegin(&MYTID);
}
void cdb_end_transaction(void) {
for (i = 0; i < MAXCDB; i++)
if (MYCURSORS[i] != NULL) {
- lprintf(1, "cdb_end_transaction: WARNING: cursor %d still open at transaction end\n", i);
+ lprintf(CTDL_WARNING, "cdb_end_transaction: WARNING: cursor %d still open at transaction end\n", i);
cclose(MYCURSORS[i]);
MYCURSORS[i] = NULL;
}
if (MYTID == NULL)
{
- lprintf(1, "cdb_end_transaction: ERROR: txcommit(NULL) !!\n");
+ lprintf(CTDL_EMERG, "cdb_end_transaction: ERROR: txcommit(NULL) !!\n");
abort();
}
else
MYTID = NULL;
}
+/*
+ * Truncate (delete every record)
+ */
+void cdb_trunc(int cdb)
+{
+ DB_TXN *tid;
+ int ret;
+ u_int32_t count;
+
+ if (MYTID != NULL)
+ {
+ lprintf(CTDL_EMERG, "cdb_trunc must not be called in a transaction.\n");
+ abort();
+ }
+ else
+ {
+ bailIfCursor(MYCURSORS, "attempt to write during r/o cursor");
+
+ retry:
+ txbegin(&tid);
+
+ if ((ret = dbp[cdb]->truncate(dbp[cdb], /* db */
+ tid, /* transaction ID */
+ &count, /* #rows deleted */
+ 0))) /* flags */
+ {
+ if (ret == DB_LOCK_DEADLOCK)
+ {
+ txabort(tid);
+ goto retry;
+ }
+ else
+ {
+ lprintf(CTDL_EMERG, "cdb_truncate(%d): %s\n", cdb, db_strerror(ret));
+ abort();
+ }
+ }
+ else
+ {
+ txcommit(tid);
+ }
+ }
+}
projects / citadel.git / blobdiff