openldap/servers/slapd/back-bdb/config.c
2005-04-22 21:35:45 +00:00

587 lines
15 KiB
C

/* config.c - bdb backend configuration file routine */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2000-2005 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include "back-bdb.h"
#include "config.h"
#include "lutil.h"
#include "ldap_rq.h"
#ifdef DB_DIRTY_READ
# define SLAP_BDB_ALLOW_DIRTY_READ
#endif
static ObjectClass *bdb_oc;
static ConfigDriver bdb_cf_oc, bdb_cf_gen;
enum {
BDB_CHKPT = 1,
BDB_CONFIG,
BDB_DIRECTORY,
BDB_NOSYNC,
BDB_DIRTYR,
BDB_INDEX,
BDB_LOCKD,
BDB_SSTACK
};
static ConfigTable bdbcfg[] = {
{ "", "", 0, 0, 0, ARG_MAGIC,
bdb_cf_oc, NULL, NULL, NULL },
{ "directory", "dir", 2, 2, 0, ARG_STRING|ARG_MAGIC|BDB_DIRECTORY,
bdb_cf_gen, "( OLcfgDbAt:0.1 NAME 'olcDbDirectory' "
"DESC 'Directory for database content' "
"EQUALITY caseIgnoreMatch "
"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
{ "cachesize", "size", 2, 2, 0, ARG_INT|ARG_OFFSET,
(void *)offsetof(struct bdb_info, bi_cache.c_maxsize),
"( OLcfgDbAt:1.1 NAME 'olcDbCacheSize' "
"DESC 'Entry cache size in entries' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ "checkpoint", "kbyte> <min", 3, 3, 0, ARG_MAGIC|BDB_CHKPT,
bdb_cf_gen, "( OLcfgDbAt:1.2 NAME 'olcDbCheckpoint' "
"DESC 'Database checkpoint interval in kbytes and minutes' "
"SYNTAX OMsDirectoryString SINGLE-VALUE )",NULL, NULL },
{ "dbconfig", "DB_CONFIG setting", 3, 0, 0, ARG_MAGIC|BDB_CONFIG,
bdb_cf_gen, "( OLcfgDbAt:1.3 NAME 'olcDbConfig' "
"DESC 'BerkeleyDB DB_CONFIG configuration directives' "
"SYNTAX OMsDirectoryString )",NULL, NULL },
{ "dbnosync", NULL, 1, 2, 0, ARG_ON_OFF|ARG_MAGIC|BDB_NOSYNC,
bdb_cf_gen, "( OLcfgDbAt:1.4 NAME 'olcDbNoSync' "
"DESC 'Disable synchronous database writes' "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "dirtyread", NULL, 1, 2, 0,
#ifdef SLAP_BDB_ALLOW_DIRTY_READ
ARG_ON_OFF|ARG_MAGIC|BDB_DIRTYR, bdb_cf_gen,
#else
ARG_IGNORED, NULL,
#endif
"( OLcfgDbAt:1.5 NAME 'olcDbDirtyRead' "
"DESC 'Allow reads of uncommitted data' "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "idlcachesize", "size", 2, 2, 0, ARG_INT|ARG_OFFSET,
(void *)offsetof(struct bdb_info,bi_idl_cache_max_size),
"( OLcfgDbAt:1.6 NAME 'olcDbIDLcacheSize' "
"DESC 'IDL cache size in IDLs' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ "index", "attr> <[pres,eq,approx,sub]", 2, 3, 0, ARG_MAGIC|BDB_INDEX,
bdb_cf_gen, "( OLcfgDbAt:0.2 NAME 'olcDbIndex' "
"DESC 'Attribute index parameters' "
"EQUALITY caseIgnoreMatch "
"SYNTAX OMsDirectoryString )", NULL, NULL },
{ "linearindex", NULL, 1, 2, 0, ARG_ON_OFF|ARG_OFFSET,
(void *)offsetof(struct bdb_info, bi_linear_index),
"( OLcfgDbAt:1.7 NAME 'olcDbLinearIndex' "
"DESC 'Index attributes one at a time' "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "lockdetect", "policy", 2, 2, 0, ARG_MAGIC|BDB_LOCKD,
bdb_cf_gen, "( OLcfgDbAt:1.8 NAME 'olcDbLockDetect' "
"DESC 'Deadlock detection algorithm' "
"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
{ "mode", "mode", 2, 2, 0, ARG_INT|ARG_OFFSET,
(void *)offsetof(struct bdb_info, bi_dbenv_mode),
"( OLcfgDbAt:0.3 NAME 'olcDbMode' "
"DESC 'Unix permissions of database files' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ "searchstack", "depth", 2, 2, 0, ARG_INT|ARG_MAGIC|BDB_SSTACK,
bdb_cf_gen, "( OLcfgDbAt:1.9 NAME 'olcDbSearchStack' "
"DESC 'Depth of search stack in IDLs' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ "shm_key", "key", 2, 2, 0, ARG_INT|ARG_OFFSET,
(void *)offsetof(struct bdb_info, bi_shm_key),
"( OLcfgDbAt:1.10 NAME 'olcDbShmKey' "
"DESC 'Key for shared memory region' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ NULL, NULL, 0, 0, 0, ARG_IGNORED,
NULL, NULL, NULL, NULL }
};
static ConfigOCs bdbocs[] = {
{ "( OLcfgDbOc:1.1 "
"NAME 'olcBdbConfig' "
"DESC 'BDB backend configuration' "
"SUP olcDatabaseConfig "
"MUST olcDbDirectory "
"MAY ( olcDbCacheSize $ olcDbCheckpoint $ olcDbConfig $ "
"olcDbNoSync $ olcDbDirtyRead $ olcDbIDLcacheSize $ "
"olcDbIndex $ olcDbLinearIndex $ olcDbLockDetect $ "
"olcDbMode $ olcDbSearchStack $ olcDbShmKey ) )",
Cft_Database, &bdb_oc },
{ NULL, 0, NULL }
};
static int
bdb_cf_oc(ConfigArgs *c)
{
if ( c->op == SLAP_CONFIG_EMIT ) {
value_add_one( &c->rvalue_vals, &bdb_oc->soc_cname );
return 0;
}
return 1;
}
static slap_verbmasks bdb_lockd[] = {
{ BER_BVC("default"), DB_LOCK_DEFAULT },
{ BER_BVC("oldest"), DB_LOCK_OLDEST },
{ BER_BVC("random"), DB_LOCK_RANDOM },
{ BER_BVC("youngest"), DB_LOCK_YOUNGEST },
{ BER_BVC("fewest"), DB_LOCK_MINLOCKS },
{ BER_BVNULL, 0 }
};
/* perform periodic checkpoints */
static void *
bdb_checkpoint( void *ctx, void *arg )
{
struct re_s *rtask = arg;
struct bdb_info *bdb = rtask->arg;
TXN_CHECKPOINT( bdb->bi_dbenv, bdb->bi_txn_cp_kbyte,
bdb->bi_txn_cp_min, 0 );
ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
return NULL;
}
/* reindex entries on the fly */
static void *
bdb_online_index( void *ctx, void *arg )
{
struct re_s *rtask = arg;
BackendDB *be = rtask->arg;
struct bdb_info *bdb = be->be_private;
Connection conn = {0};
char opbuf[OPERATION_BUFFER_SIZE];
Operation *op = (Operation *)opbuf;
DBC *curs;
DBT key, data;
DB_TXN *txn;
DB_LOCK lock;
u_int32_t locker;
ID id, nid;
EntryInfo *ei;
int rc, getnext = 1;
connection_fake_init( &conn, op, ctx );
op->o_bd = be;
DBTzero( &key );
DBTzero( &data );
id = 1;
key.data = &nid;
key.size = key.ulen = sizeof(ID);
key.flags = DB_DBT_USERMEM;
data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
data.dlen = data.ulen = 0;
while ( 1 ) {
if ( slapd_shutdown )
break;
rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &txn, bdb->bi_db_opflags );
if ( rc )
break;
locker = TXN_ID( txn );
if ( getnext ) {
getnext = 0;
BDB_ID2DISK( id, &nid );
rc = bdb->bi_id2entry->bdi_db->cursor(
bdb->bi_id2entry->bdi_db, txn, &curs, bdb->bi_db_opflags );
if ( rc ) {
TXN_ABORT( txn );
break;
}
rc = curs->c_get( curs, &key, &data, DB_SET_RANGE );
curs->c_close( curs );
if ( rc ) {
TXN_ABORT( txn );
if ( rc == DB_NOTFOUND )
rc = 0;
if ( rc == DB_LOCK_DEADLOCK ) {
ldap_pvt_thread_yield();
continue;
}
break;
}
BDB_DISK2ID( &nid, &id );
}
ei = NULL;
rc = bdb_cache_find_id( op, txn, id, &ei, 0, locker, &lock );
if ( rc ) {
TXN_ABORT( txn );
if ( rc == DB_LOCK_DEADLOCK ) {
ldap_pvt_thread_yield();
continue;
}
if ( rc == DB_NOTFOUND ) {
id++;
getnext = 1;
continue;
}
break;
}
if ( ei->bei_e ) {
rc = bdb_index_entry( op, txn, BDB_INDEX_UPDATE_OP, ei->bei_e );
if ( rc == DB_LOCK_DEADLOCK ) {
TXN_ABORT( txn );
ldap_pvt_thread_yield();
continue;
}
if ( rc == 0 ) {
rc = TXN_COMMIT( txn, 0 );
txn = NULL;
}
if ( rc )
break;
}
id++;
getnext = 1;
}
out:
ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
ldap_pvt_runqueue_remove( &slapd_rq, rtask );
ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
return NULL;
}
/* Cleanup loose ends after Modify completes */
static int
bdb_cf_cleanup( ConfigArgs *c )
{
struct bdb_info *bdb = c->be->be_private;
int rc = 0;
if ( bdb->bi_flags & BDB_UPD_CONFIG ) {
if ( bdb->bi_db_config ) {
int i;
FILE *f = fopen( bdb->bi_db_config_path, "w" );
if ( f ) {
for (i=0; bdb->bi_db_config[i].bv_val; i++)
fprintf( f, "%s\n", bdb->bi_db_config[i].bv_val );
fclose( f );
}
} else {
unlink( bdb->bi_db_config_path );
}
bdb->bi_flags ^= BDB_UPD_CONFIG;
}
if ( bdb->bi_flags & BDB_DEL_INDEX ) {
bdb_attr_flush( bdb );
bdb->bi_flags ^= BDB_DEL_INDEX;
}
if ( bdb->bi_flags & BDB_RE_OPEN ) {
bdb->bi_flags ^= BDB_RE_OPEN;
rc = c->be->bd_info->bi_db_close( c->be );
if ( rc == 0 )
rc = c->be->bd_info->bi_db_open( c->be );
/* If this fails, we need to restart */
if ( rc )
slapd_shutdown = 1;
}
return rc;
}
static int
bdb_cf_gen(ConfigArgs *c)
{
struct bdb_info *bdb = c->be->be_private;
int rc;
if ( c->op == SLAP_CONFIG_EMIT ) {
rc = 0;
switch( c->type ) {
case BDB_CHKPT:
if (bdb->bi_txn_cp ) {
char buf[64];
struct berval bv;
bv.bv_len = sprintf( buf, "%d %d", bdb->bi_txn_cp_kbyte,
bdb->bi_txn_cp_min );
bv.bv_val = buf;
value_add_one( &c->rvalue_vals, &bv );
} else{
rc = 1;
}
break;
case BDB_DIRECTORY:
if ( bdb->bi_dbenv_home ) {
c->value_string = ch_strdup( bdb->bi_dbenv_home );
} else {
rc = 1;
}
break;
case BDB_CONFIG:
if ( bdb->bi_db_config ) {
int i;
struct berval bv;
bv.bv_val = c->log;
for (i=0; !BER_BVISNULL(&bdb->bi_db_config[i]); i++) {
bv.bv_len = sprintf( bv.bv_val, "{%d}%s", i,
bdb->bi_db_config[i].bv_val );
value_add_one( &c->rvalue_vals, &bv );
}
}
if ( !c->rvalue_vals ) rc = 1;
break;
case BDB_NOSYNC:
if ( bdb->bi_dbenv_xflags & DB_TXN_NOSYNC )
c->value_int = 1;
break;
case BDB_INDEX:
bdb_attr_index_unparse( bdb, &c->rvalue_vals );
if ( !c->rvalue_vals ) rc = 1;
break;
case BDB_LOCKD:
rc = 1;
if ( bdb->bi_lock_detect != DB_LOCK_DEFAULT ) {
int i;
for (i=0; !BER_BVISNULL(&bdb_lockd[i].word); i++) {
if ( bdb->bi_lock_detect == bdb_lockd[i].mask ) {
value_add_one( &c->rvalue_vals, &bdb_lockd[i].word );
rc = 0;
break;
}
}
}
break;
case BDB_SSTACK:
c->value_int = bdb->bi_search_stack_depth;
break;
}
return rc;
} else if ( c->op == LDAP_MOD_DELETE ) {
rc = 0;
switch( c->type ) {
/* single-valued no-ops */
case BDB_LOCKD:
case BDB_SSTACK:
break;
case BDB_CHKPT:
if ( bdb->bi_txn_cp_task ) {
struct re_s *re = bdb->bi_txn_cp_task;
bdb->bi_txn_cp_task = NULL;
if ( ldap_pvt_runqueue_isrunning( &slapd_rq, re ))
ldap_pvt_runqueue_stoptask( &slapd_rq, re );
ldap_pvt_runqueue_remove( &slapd_rq, re );
}
bdb->bi_txn_cp = 0;
break;
case BDB_CONFIG:
if ( c->valx < 0 ) {
ber_bvarray_free( bdb->bi_db_config );
bdb->bi_db_config = NULL;
} else {
int i = c->valx;
ch_free( bdb->bi_db_config[i].bv_val );
for (; bdb->bi_db_config[i].bv_val; i++)
bdb->bi_db_config[i] = bdb->bi_db_config[i+1];
}
bdb->bi_flags |= BDB_UPD_CONFIG;
c->cleanup = bdb_cf_cleanup;
break;
case BDB_DIRECTORY:
bdb->bi_flags |= BDB_RE_OPEN;
bdb->bi_flags ^= BDB_HAS_CONFIG;
ch_free( bdb->bi_dbenv_home );
bdb->bi_dbenv_home = NULL;
ch_free( bdb->bi_db_config_path );
bdb->bi_db_config_path = NULL;
c->cleanup = bdb_cf_cleanup;
break;
case BDB_NOSYNC:
bdb->bi_dbenv->set_flags( bdb->bi_dbenv, DB_TXN_NOSYNC, 0 );
break;
case BDB_INDEX: {
AttributeDescription *ad = NULL;
struct berval bv, def = BER_BVC("default");
char *ptr;
const char *text;
for (ptr = c->line; !isspace( *ptr ); ptr++);
bv.bv_val = c->line;
bv.bv_len = ptr - bv.bv_val;
if ( bvmatch( &bv, &def )) {
bdb->bi_defaultmask = 0;
} else {
slap_bv2ad( &bv, &ad, &text );
if ( ad ) {
AttrInfo *ai = bdb_attr_mask( bdb, ad );
ai->ai_indexmask |= BDB_INDEX_DELETING;
bdb->bi_flags |= BDB_DEL_INDEX;
c->cleanup = bdb_cf_cleanup;
}
}
}
break;
}
return rc;
}
switch( c->type ) {
case BDB_CHKPT:
bdb->bi_txn_cp = 1;
bdb->bi_txn_cp_kbyte = strtol( c->argv[1], NULL, 0 );
bdb->bi_txn_cp_min = strtol( c->argv[2], NULL, 0 );
/* If we're in server mode and time-based checkpointing is enabled,
* submit a task to perform periodic checkpoints.
*/
if ((slapMode & SLAP_SERVER_MODE) && bdb->bi_txn_cp_min ) {
struct re_s *re = bdb->bi_txn_cp_task;
if ( re )
re->interval.tv_sec = bdb->bi_txn_cp_min * 60;
else
bdb->bi_txn_cp_task = ldap_pvt_runqueue_insert( &slapd_rq,
bdb->bi_txn_cp_min * 60, bdb_checkpoint, bdb );
}
break;
case BDB_CONFIG: {
char *ptr = c->line + STRLENOF("dbconfig");
struct berval bv;
while (!isspace(*ptr)) ptr++;
while (isspace(*ptr)) ptr++;
if ( bdb->bi_flags & BDB_IS_OPEN ) {
bdb->bi_flags |= BDB_UPD_CONFIG;
c->cleanup = bdb_cf_cleanup;
} else {
/* If we're just starting up...
*/
FILE *f;
/* If a DB_CONFIG file exists, or we don't know the path
* to the DB_CONFIG file, ignore these directives
*/
if (( bdb->bi_flags & BDB_HAS_CONFIG ) || !bdb->bi_db_config_path )
break;
f = fopen( bdb->bi_db_config_path, "a" );
if ( f ) {
/* FIXME: EBCDIC probably needs special handling */
fprintf( f, "%s\n", ptr );
fclose( f );
}
}
ber_str2bv( ptr, 0, 1, &bv );
ber_bvarray_add( &bdb->bi_db_config, &bv );
}
break;
case BDB_DIRECTORY: {
FILE *f;
char *ptr;
if ( bdb->bi_dbenv_home )
ch_free( bdb->bi_dbenv_home );
bdb->bi_dbenv_home = c->value_string;
/* See if a DB_CONFIG file already exists here */
if ( bdb->bi_db_config_path )
ch_free( bdb->bi_db_config_path );
bdb->bi_db_config_path = ch_malloc( strlen( bdb->bi_dbenv_home ) +
STRLENOF(LDAP_DIRSEP) + STRLENOF("DB_CONFIG") + 1 );
ptr = lutil_strcopy( bdb->bi_db_config_path, bdb->bi_dbenv_home );
*ptr++ = LDAP_DIRSEP[0];
strcpy( ptr, "DB_CONFIG" );
f = fopen( bdb->bi_db_config_path, "r" );
if ( f ) {
bdb->bi_flags |= BDB_HAS_CONFIG;
fclose(f);
}
}
break;
case BDB_NOSYNC:
if ( c->value_int )
bdb->bi_dbenv_xflags |= DB_TXN_NOSYNC;
else
bdb->bi_dbenv_xflags &= ~DB_TXN_NOSYNC;
if ( bdb->bi_flags & BDB_IS_OPEN ) {
bdb->bi_dbenv->set_flags( bdb->bi_dbenv, DB_TXN_NOSYNC,
c->value_int );
}
break;
case BDB_INDEX:
rc = bdb_attr_index_config( bdb, c->fname, c->lineno,
c->argc - 1, &c->argv[1] );
if( rc != LDAP_SUCCESS ) return 1;
if ( bdb->bi_flags & BDB_IS_OPEN ) {
/* Start the task as soon as we finish here */
ldap_pvt_runqueue_insert( &slapd_rq, 60,
bdb_online_index, c->be );
}
break;
case BDB_LOCKD:
rc = verb_to_mask( c->argv[1], bdb_lockd );
if ( BER_BVISNULL(&bdb_lockd[rc].word) ) {
fprintf( stderr, "%s: "
"bad policy (%s) in \"lockDetect <policy>\" line\n",
c->log, c->argv[1] );
return 1;
}
bdb->bi_lock_detect = rc;
break;
case BDB_SSTACK:
if ( c->value_int < MINIMUM_SEARCH_STACK_DEPTH ) {
fprintf( stderr,
"%s: depth %d too small, using %d\n",
c->log, c->value_int, MINIMUM_SEARCH_STACK_DEPTH );
c->value_int = MINIMUM_SEARCH_STACK_DEPTH;
}
bdb->bi_search_stack_depth = c->value_int;
break;
}
return 0;
}
int bdb_back_init_cf( BackendInfo *bi )
{
int rc;
bi->bi_cf_table = bdbcfg;
rc = config_register_schema( bdbcfg, bdbocs );
if ( rc ) return rc;
bdbcfg[0].ad = slap_schema.si_ad_objectClass;
return 0;
}