/*
* keydb_db4.c - Routines to store and fetch keys in a DB4 database.
*
- * Jonathan McDowell <noodles@earth.li>
- *
- * Copyright 2002-2004 Project Purple
+ * Copyright 2002-2008 Jonathan McDowell <noodles@earth.li>
*/
#include <sys/types.h>
+#include <sys/stat.h>
#include <sys/uio.h>
#include <ctype.h>
#include <errno.h>
#include "parsekey.h"
#include "wordlist.h"
+#define DB4_UPGRADE_FILE "db_upgrade.lck"
+
/**
* dbenv - our database environment.
*/
return(dbconns[keytrun % numdbs]);
}
+/**
+ * db4_errfunc - Direct DB errors to logfile
+ *
+ * Basic function to take errors from the DB library and output them to
+ * the logfile rather than stderr.
+ */
+#if (DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR < 3)
+static void db4_errfunc(const char *errpfx, const char *errmsg)
+#else
+static void db4_errfunc(const DB_ENV *edbenv, const char *errpfx,
+ const char *errmsg)
+#endif
+{
+ if (errpfx) {
+ logthing(LOGTHING_DEBUG, "db4 error: %s:%s", errpfx, errmsg);
+ } else {
+ logthing(LOGTHING_DEBUG, "db4 error: %s", errmsg);
+ }
+
+ return;
+}
+
/**
* starttrans - Start a transaction.
*
}
}
+/**
+ * db4_upgradedb - Upgrade a DB4 database
+ *
+ * Called if we discover we need to upgrade our DB4 database; ie if
+ * we're running with a newer version of db4 than the database was
+ * created with.
+ */
+static int db4_upgradedb(int numdb)
+{
+ DB *curdb = NULL;
+ int ret;
+ int i;
+ char buf[1024];
+ int lockfile_fd;
+ struct stat statbuf;
+
+ snprintf(buf, sizeof(buf) - 1, "%s/%s", config.db_dir,
+ DB4_UPGRADE_FILE);
+ lockfile_fd = open(buf, O_RDWR | O_CREAT | O_EXCL, 0600);
+ if (lockfile_fd < 0) {
+ if (errno == EEXIST) {
+ while (stat(buf, &statbuf) == 0) ;
+ return 0;
+ } else {
+ logthing(LOGTHING_CRITICAL, "Couldn't open database "
+ "update lock file: %s", strerror(errno));
+ return -1;
+ }
+ }
+ snprintf(buf, sizeof(buf) - 1, "%d", getpid());
+ write(lockfile_fd, buf, strlen(buf));
+ close(lockfile_fd);
+
+ logthing(LOGTHING_NOTICE, "Upgrading DB4 database");
+ ret = db_env_create(&dbenv, 0);
+ dbenv->set_errcall(dbenv, &db4_errfunc);
+ dbenv->remove(dbenv, config.db_dir, 0);
+ dbenv = NULL;
+ for (i = 0; i < numdb; i++) {
+ ret = db_create(&curdb, NULL, 0);
+ if (ret == 0) {
+ snprintf(buf, sizeof(buf) - 1, "%s/keydb.%d.db",
+ config.db_dir, i);
+ logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
+ ret = curdb->upgrade(curdb, buf, 0);
+ curdb->close(curdb, 0);
+ } else {
+ logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
+ buf,
+ db_strerror(ret));
+ }
+ }
+
+ ret = db_create(&curdb, NULL, 0);
+ if (ret == 0) {
+ snprintf(buf, sizeof(buf) - 1, "%s/worddb", config.db_dir);
+ logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
+ ret = curdb->upgrade(curdb, buf, 0);
+ curdb->close(curdb, 0);
+ } else {
+ logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
+ buf,
+ db_strerror(ret));
+ }
+
+ ret = db_create(&curdb, NULL, 0);
+ if (ret == 0) {
+ snprintf(buf, sizeof(buf) - 1, "%s/id32db", config.db_dir);
+ logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
+ ret = curdb->upgrade(curdb, buf, 0);
+ curdb->close(curdb, 0);
+ } else {
+ logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
+ buf,
+ db_strerror(ret));
+ }
+
+ snprintf(buf, sizeof(buf) - 1, "%s/%s", config.db_dir,
+ DB4_UPGRADE_FILE);
+ unlink(buf);
+
+ return ret;
+}
+
/**
* initdb - Initialize the key database.
*
int ret = 0;
int i = 0;
u_int32_t flags = 0;
+ struct stat statbuf;
+
+ snprintf(buf, sizeof(buf) - 1, "%s/%s", config.db_dir,
+ DB4_UPGRADE_FILE);
+ ret = stat(buf, &statbuf);
+ while ((ret == 0) || (errno != ENOENT)) {
+ if (ret != 0) {
+ logthing(LOGTHING_CRITICAL, "Couldn't stat upgrade "
+ "lock file: %s (%d)", strerror(errno), ret);
+ exit(1);
+ }
+ logthing(LOGTHING_DEBUG, "DB4 upgrade in progress; waiting.");
+ sleep(5);
+ ret = stat(buf, &statbuf);
+ }
+ ret = 0;
snprintf(buf, sizeof(buf) - 1, "%s/num_keydb", config.db_dir);
numdb = fopen(buf, "r");
* sure how to make the standard DB functions do that yet.
*/
if (ret == 0) {
+ dbenv->set_errcall(dbenv, &db4_errfunc);
ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
if (ret != 0) {
logthing(LOGTHING_CRITICAL,
DB_INIT_TXN |
DB_CREATE,
0);
+#ifdef DB_VERSION_MISMATCH
+ if (ret == DB_VERSION_MISMATCH) {
+ dbenv->close(dbenv, 0);
+ dbenv = NULL;
+ ret = db4_upgradedb(numdbs);
+ if (ret == 0) {
+ ret = db_env_create(&dbenv, 0);
+ }
+ if (ret == 0) {
+ dbenv->set_errcall(dbenv, &db4_errfunc);
+ dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
+ ret = dbenv->open(dbenv, config.db_dir,
+ DB_INIT_LOG | DB_INIT_MPOOL |
+ DB_INIT_LOCK | DB_INIT_TXN |
+ DB_CREATE | DB_RECOVER,
+ 0);
+
+ if (ret == 0) {
+ dbenv->txn_checkpoint(dbenv,
+ 0,
+ 0,
+ DB_FORCE);
+ }
+ }
+ }
+#endif
if (ret != 0) {
logthing(LOGTHING_CRITICAL,
"Error opening db environment: %s (%s)",
return;
}
+/**
+ * getfullkeyid - Maps a 32bit key id to a 64bit one.
+ * @keyid: The 32bit keyid.
+ *
+ * This function maps a 32bit key id to the full 64bit one. It returns the
+ * full keyid. If the key isn't found a keyid of 0 is returned.
+ */
+static uint64_t db4_getfullkeyid(uint64_t keyid)
+{
+ DBT key, data;
+ DBC *cursor = NULL;
+ uint32_t shortkeyid = 0;
+ int ret = 0;
+
+ if (keyid < 0x100000000LL) {
+ ret = id32db->cursor(id32db,
+ txn,
+ &cursor,
+ 0); /* flags */
+
+ shortkeyid = keyid & 0xFFFFFFFF;
+
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+ key.data = &shortkeyid;
+ key.size = sizeof(shortkeyid);
+ data.flags = DB_DBT_MALLOC;
+
+ ret = cursor->c_get(cursor,
+ &key,
+ &data,
+ DB_SET);
+
+ if (ret == 0) {
+ keyid = *(uint64_t *) data.data;
+
+ if (data.data != NULL) {
+ free(data.data);
+ data.data = NULL;
+ }
+ }
+
+ ret = cursor->c_close(cursor);
+ cursor = NULL;
+ }
+
+ return keyid;
+}
+
/**
* fetch_key - Given a keyid fetch the key from storage.
* @keyid: The keyid to fetch.
struct buffer_ctx fetchbuf;
if (keyid < 0x100000000LL) {
- keyid = getfullkeyid(keyid);
+ keyid = db4_getfullkeyid(keyid);
}
memset(&key, 0, sizeof(key));
struct ll *curword = NULL;
struct keyarray keylist = { NULL, 0, 0 };
struct keyarray newkeylist = { NULL, 0, 0 };
+ int firstpass = 1;
numkeys = 0;
searchtext = strdup(search);
data.data)[i];
}
- if (keylist.count == 0 ||
- array_find(&keylist, keyid)) {
+ /*
+ * Only add the keys containing this word if this is
+ * our first pass (ie we have no existing key list),
+ * or the key contained a previous word.
+ */
+ if (firstpass || array_find(&keylist, keyid)) {
array_add(&newkeylist, keyid);
}
}
ret = cursor->c_close(cursor);
cursor = NULL;
+ firstpass = 0;
db4_endtrans();
}
llfree(wordlist, NULL);
return numkeys;
}
-/**
- * getfullkeyid - Maps a 32bit key id to a 64bit one.
- * @keyid: The 32bit keyid.
- *
- * This function maps a 32bit key id to the full 64bit one. It returns the
- * full keyid. If the key isn't found a keyid of 0 is returned.
- */
-static uint64_t db4_getfullkeyid(uint64_t keyid)
-{
- DBT key, data;
- DBC *cursor = NULL;
- uint32_t shortkeyid = 0;
- int ret = 0;
-
- if (keyid < 0x100000000LL) {
- ret = id32db->cursor(id32db,
- txn,
- &cursor,
- 0); /* flags */
-
- shortkeyid = keyid & 0xFFFFFFFF;
-
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- key.data = &shortkeyid;
- key.size = sizeof(shortkeyid);
- data.flags = DB_DBT_MALLOC;
-
- ret = cursor->c_get(cursor,
- &key,
- &data,
- DB_SET);
-
- if (ret == 0) {
- keyid = *(uint64_t *) data.data;
-
- if (data.data != NULL) {
- free(data.data);
- data.data = NULL;
- }
- }
-
- ret = cursor->c_close(cursor);
- cursor = NULL;
- }
-
- return keyid;
-}
-
/*
* Include the basic keydb routines.
*/
projects / onak.git / blobdiff