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openldap/servers/slapd/back-bdb/init.c
Quanah Gibson-Mount 1df85d3427 Happy New Year!
2017-01-03 12:36:47 -08:00

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/* init.c - initialize bdb backend */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2000-2017 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 <ac/unistd.h>
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <sys/stat.h>
#include "back-bdb.h"
#include <lutil.h>
#include <ldap_rq.h>
#include "alock.h"
#include "config.h"
static const struct bdbi_database {
char *file;
struct berval name;
int type;
int flags;
} bdbi_databases[] = {
{ "id2entry" BDB_SUFFIX, BER_BVC("id2entry"), DB_BTREE, 0 },
{ "dn2id" BDB_SUFFIX, BER_BVC("dn2id"), DB_BTREE, 0 },
{ NULL, BER_BVNULL, 0, 0 }
};
typedef void * db_malloc(size_t);
typedef void * db_realloc(void *, size_t);
#define bdb_db_init BDB_SYMBOL(db_init)
#define bdb_db_open BDB_SYMBOL(db_open)
#define bdb_db_close BDB_SYMBOL(db_close)
static int
bdb_db_init( BackendDB *be, ConfigReply *cr )
{
struct bdb_info *bdb;
int rc;
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(bdb_db_init) ": Initializing " BDB_UCTYPE " database\n",
0, 0, 0 );
/* allocate backend-database-specific stuff */
bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
/* DBEnv parameters */
bdb->bi_dbenv_home = ch_strdup( SLAPD_DEFAULT_DB_DIR );
bdb->bi_dbenv_xflags = DB_TIME_NOTGRANTED;
bdb->bi_dbenv_mode = SLAPD_DEFAULT_DB_MODE;
bdb->bi_cache.c_maxsize = DEFAULT_CACHE_SIZE;
bdb->bi_cache.c_minfree = 1;
bdb->bi_lock_detect = DB_LOCK_DEFAULT;
bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
bdb->bi_search_stack = NULL;
ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
#ifdef BDB_HIER
ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
#endif
ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_lru_mutex );
ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_count_mutex );
ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_eifree_mutex );
ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
be->be_private = bdb;
be->be_cf_ocs = be->bd_info->bi_cf_ocs;
#ifndef BDB_MULTIPLE_SUFFIXES
SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_ONE_SUFFIX;
#endif
rc = bdb_monitor_db_init( be );
return rc;
}
static int
bdb_db_close( BackendDB *be, ConfigReply *cr );
static int
bdb_db_open( BackendDB *be, ConfigReply *cr )
{
int rc, i;
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
struct stat stat1, stat2;
u_int32_t flags;
char path[MAXPATHLEN];
char *dbhome;
Entry *e = NULL;
int do_recover = 0, do_alock_recover = 0;
int alockt, quick = 0;
int do_retry = 1;
if ( be->be_suffix == NULL ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": need suffix.\n",
1, 0, 0 );
return -1;
}
Debug( LDAP_DEBUG_ARGS,
LDAP_XSTRING(bdb_db_open) ": \"%s\"\n",
be->be_suffix[0].bv_val, 0, 0 );
/* Check existence of dbenv_home. Any error means trouble */
rc = stat( bdb->bi_dbenv_home, &stat1 );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"cannot access database directory \"%s\" (%d).\n",
be->be_suffix[0].bv_val, bdb->bi_dbenv_home, errno );
return -1;
}
/* Perform database use arbitration/recovery logic */
alockt = (slapMode & SLAP_TOOL_READONLY) ? ALOCK_LOCKED : ALOCK_UNIQUE;
if ( slapMode & SLAP_TOOL_QUICK ) {
alockt |= ALOCK_NOSAVE;
quick = 1;
}
rc = alock_open( &bdb->bi_alock_info,
"slapd",
bdb->bi_dbenv_home, alockt );
/* alockt is TRUE if the existing environment was created in Quick mode */
alockt = (rc & ALOCK_NOSAVE) ? 1 : 0;
rc &= ~ALOCK_NOSAVE;
if( rc == ALOCK_RECOVER ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"unclean shutdown detected; attempting recovery.\n",
be->be_suffix[0].bv_val, 0, 0 );
do_alock_recover = 1;
do_recover = DB_RECOVER;
} else if( rc == ALOCK_BUSY ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"database already in use.\n",
be->be_suffix[0].bv_val, 0, 0 );
return -1;
} else if( rc != ALOCK_CLEAN ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"alock package is unstable.\n",
be->be_suffix[0].bv_val, 0, 0 );
return -1;
}
if ( rc == ALOCK_CLEAN )
be->be_flags |= SLAP_DBFLAG_CLEAN;
/*
* The DB_CONFIG file may have changed. If so, recover the
* database so that new settings are put into effect. Also
* note the possible absence of DB_CONFIG in the log.
*/
if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
if ( !do_recover ) {
char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
*ptr++ = LDAP_DIRSEP[0];
strcpy( ptr, "__db.001" );
if( stat( path, &stat2 ) == 0 ) {
if( stat2.st_mtime < stat1.st_mtime ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix \"%s\" has changed.\n",
be->be_suffix[0].bv_val, 0, 0 );
if ( quick ) {
Debug( LDAP_DEBUG_ANY,
"Cannot use Quick mode; perform manual recovery first.\n",
0, 0, 0 );
slapMode ^= SLAP_TOOL_QUICK;
rc = -1;
goto fail;
} else {
Debug( LDAP_DEBUG_ANY,
"Performing database recovery to activate new settings.\n",
0, 0, 0 );
}
do_recover = DB_RECOVER;
}
}
}
}
else {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": warning - no DB_CONFIG file found "
"in directory %s: (%d).\n"
"Expect poor performance for suffix \"%s\".\n",
bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
}
/* Always let slapcat run, regardless of environment state.
* This can be used to cause a cache flush after an unclean
* shutdown.
*/
if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"recovery skipped in read-only mode. "
"Run manual recovery if errors are encountered.\n",
be->be_suffix[0].bv_val, 0, 0 );
do_recover = 0;
do_alock_recover = 0;
quick = alockt;
}
/* An existing environment in Quick mode has nothing to recover. */
if ( alockt && do_recover ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"cannot recover, database must be reinitialized.\n",
be->be_suffix[0].bv_val, 0, 0 );
rc = -1;
goto fail;
}
rc = db_env_create( &bdb->bi_dbenv, 0 );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"db_env_create failed: %s (%d).\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
goto fail;
}
#ifdef HAVE_EBCDIC
strcpy( path, bdb->bi_dbenv_home );
__atoe( path );
dbhome = path;
#else
dbhome = bdb->bi_dbenv_home;
#endif
/* If existing environment is clean but doesn't support
* currently requested modes, remove it.
*/
if ( !do_recover && ( alockt ^ quick )) {
shm_retry:
rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
if ( rc ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"dbenv remove failed: %s (%d).\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
bdb->bi_dbenv = NULL;
goto fail;
}
rc = db_env_create( &bdb->bi_dbenv, 0 );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"db_env_create failed: %s (%d).\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
goto fail;
}
}
bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
if ( !BER_BVISNULL( &bdb->bi_db_crypt_key )) {
rc = bdb->bi_dbenv->set_encrypt( bdb->bi_dbenv, bdb->bi_db_crypt_key.bv_val,
DB_ENCRYPT_AES );
if ( rc ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"dbenv set_encrypt failed: %s (%d).\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
goto fail;
}
}
/* One long-lived TXN per thread, two TXNs per write op */
bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
if( bdb->bi_dbenv_xflags != 0 ) {
rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
bdb->bi_dbenv_xflags, 1);
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"dbenv_set_flags failed: %s (%d).\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
goto fail;
}
}
#define BDB_TXN_FLAGS (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
"dbenv_open(%s).\n",
be->be_suffix[0].bv_val, bdb->bi_dbenv_home, 0);
flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
if ( !quick )
flags |= BDB_TXN_FLAGS;
/* If a key was set, use shared memory for the BDB environment */
if ( bdb->bi_shm_key ) {
bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
flags |= DB_SYSTEM_MEM;
}
rc = (bdb->bi_dbenv->open)( bdb->bi_dbenv, dbhome,
flags | do_recover, bdb->bi_dbenv_mode );
if ( rc ) {
/* Regular open failed, probably a missing shm environment.
* Start over, do a recovery.
*/
if ( !do_recover && bdb->bi_shm_key && do_retry ) {
bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
rc = db_env_create( &bdb->bi_dbenv, 0 );
if( rc == 0 ) {
Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
": database \"%s\": "
"shared memory env open failed, assuming stale env.\n",
be->be_suffix[0].bv_val, 0, 0 );
do_retry = 0;
goto shm_retry;
}
}
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\" cannot be %s, err %d. "
"Restore from backup!\n",
be->be_suffix[0].bv_val, do_recover ? "recovered" : "opened", rc );
goto fail;
}
if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": database \"%s\": alock_recover failed\n",
be->be_suffix[0].bv_val, 0, 0 );
rc = -1;
goto fail;
}
#ifdef SLAP_ZONE_ALLOC
if ( bdb->bi_cache.c_maxsize ) {
bdb->bi_cache.c_zctx = slap_zn_mem_create(
SLAP_ZONE_INITSIZE, SLAP_ZONE_MAXSIZE,
SLAP_ZONE_DELTA, SLAP_ZONE_SIZE);
}
#endif
/* dncache defaults to 0 == unlimited
* must be >= entrycache
*/
if ( bdb->bi_cache.c_eimax && bdb->bi_cache.c_eimax < bdb->bi_cache.c_maxsize ) {
bdb->bi_cache.c_eimax = bdb->bi_cache.c_maxsize;
}
if ( bdb->bi_idl_cache_max_size ) {
bdb->bi_idl_tree = NULL;
bdb->bi_idl_cache_size = 0;
}
flags = DB_THREAD | bdb->bi_db_opflags;
#ifdef DB_AUTO_COMMIT
if ( !quick )
flags |= DB_AUTO_COMMIT;
#endif
bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
BDB_INDICES * sizeof(struct bdb_db_info *) );
/* open (and create) main database */
for( i = 0; bdbi_databases[i].name.bv_val; i++ ) {
struct bdb_db_info *db;
db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
if( rc != 0 ) {
snprintf(cr->msg, sizeof(cr->msg),
"database \"%s\": db_create(%s) failed: %s (%d).",
be->be_suffix[0].bv_val,
bdb->bi_dbenv_home, db_strerror(rc), rc );
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": %s\n",
cr->msg, 0, 0 );
ch_free( db );
goto fail;
}
if( !BER_BVISNULL( &bdb->bi_db_crypt_key )) {
rc = db->bdi_db->set_flags( db->bdi_db, DB_ENCRYPT );
if ( rc ) {
snprintf(cr->msg, sizeof(cr->msg),
"database \"%s\": db set_flags(DB_ENCRYPT)(%s) failed: %s (%d).",
be->be_suffix[0].bv_val,
bdb->bi_dbenv_home, db_strerror(rc), rc );
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": %s\n",
cr->msg, 0, 0 );
db->bdi_db->close( db->bdi_db, 0 );
ch_free( db );
goto fail;
}
}
if( bdb->bi_flags & BDB_CHKSUM ) {
rc = db->bdi_db->set_flags( db->bdi_db, DB_CHKSUM );
if ( rc ) {
snprintf(cr->msg, sizeof(cr->msg),
"database \"%s\": db set_flags(DB_CHKSUM)(%s) failed: %s (%d).",
be->be_suffix[0].bv_val,
bdb->bi_dbenv_home, db_strerror(rc), rc );
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": %s\n",
cr->msg, 0, 0 );
db->bdi_db->close( db->bdi_db, 0 );
ch_free( db );
goto fail;
}
}
rc = bdb_db_findsize( bdb, (struct berval *)&bdbi_databases[i].name );
if( i == BDB_ID2ENTRY ) {
if ( !rc ) rc = BDB_ID2ENTRY_PAGESIZE;
rc = db->bdi_db->set_pagesize( db->bdi_db, rc );
if ( slapMode & SLAP_TOOL_MODE )
db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
DB_PRIORITY_VERY_LOW );
if ( slapMode & SLAP_TOOL_READMAIN ) {
flags |= DB_RDONLY;
} else {
flags |= DB_CREATE;
}
} else {
/* Use FS default size if not configured */
if ( rc )
rc = db->bdi_db->set_pagesize( db->bdi_db, rc );
rc = db->bdi_db->set_flags( db->bdi_db,
DB_DUP | DB_DUPSORT );
#ifndef BDB_HIER
if ( slapMode & SLAP_TOOL_READONLY ) {
flags |= DB_RDONLY;
} else {
flags |= DB_CREATE;
}
#else
rc = db->bdi_db->set_dup_compare( db->bdi_db,
bdb_dup_compare );
if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
flags |= DB_RDONLY;
} else {
flags |= DB_CREATE;
}
#endif
}
#ifdef HAVE_EBCDIC
strcpy( path, bdbi_databases[i].file );
__atoe( path );
rc = DB_OPEN( db->bdi_db,
path,
/* bdbi_databases[i].name, */ NULL,
bdbi_databases[i].type,
bdbi_databases[i].flags | flags,
bdb->bi_dbenv_mode );
#else
rc = DB_OPEN( db->bdi_db,
bdbi_databases[i].file,
/* bdbi_databases[i].name, */ NULL,
bdbi_databases[i].type,
bdbi_databases[i].flags | flags,
bdb->bi_dbenv_mode );
#endif
if ( rc != 0 ) {
snprintf( cr->msg, sizeof(cr->msg), "database \"%s\": "
"db_open(%s/%s) failed: %s (%d).",
be->be_suffix[0].bv_val,
bdb->bi_dbenv_home, bdbi_databases[i].file,
db_strerror(rc), rc );
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": %s\n",
cr->msg, 0, 0 );
db->bdi_db->close( db->bdi_db, 0 );
ch_free( db );
goto fail;
}
flags &= ~(DB_CREATE | DB_RDONLY);
db->bdi_name = bdbi_databases[i].name;
bdb->bi_databases[i] = db;
}
bdb->bi_databases[i] = NULL;
bdb->bi_ndatabases = i;
/* get nextid */
rc = bdb_last_id( be, NULL );
if( rc != 0 ) {
snprintf( cr->msg, sizeof(cr->msg), "database \"%s\": "
"last_id(%s) failed: %s (%d).",
be->be_suffix[0].bv_val, bdb->bi_dbenv_home,
db_strerror(rc), rc );
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_db_open) ": %s\n",
cr->msg, 0, 0 );
goto fail;
}
if ( !quick ) {
int txflag = DB_READ_COMMITTED;
/* avoid deadlocks in server; tools should
* wait since they have no deadlock retry mechanism.
*/
if ( slapMode & SLAP_SERVER_MODE )
txflag |= DB_TXN_NOWAIT;
TXN_BEGIN(bdb->bi_dbenv, NULL, &bdb->bi_cache.c_txn, txflag);
}
entry_prealloc( bdb->bi_cache.c_maxsize );
attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
/* setup for empty-DN contexts */
if ( BER_BVISEMPTY( &be->be_nsuffix[0] )) {
rc = bdb_id2entry( be, NULL, 0, &e );
}
if ( !e ) {
struct berval gluebv = BER_BVC("glue");
Operation op = {0};
Opheader ohdr = {0};
e = entry_alloc();
e->e_id = 0;
ber_dupbv( &e->e_name, (struct berval *)&slap_empty_bv );
ber_dupbv( &e->e_nname, (struct berval *)&slap_empty_bv );
attr_merge_one( e, slap_schema.si_ad_objectClass,
&gluebv, NULL );
attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
&gluebv, NULL );
op.o_hdr = &ohdr;
op.o_bd = be;
op.ora_e = e;
op.o_dn = be->be_rootdn;
op.o_ndn = be->be_rootndn;
slap_add_opattrs( &op, NULL, NULL, 0, 0 );
}
e->e_ocflags = SLAP_OC_GLUE|SLAP_OC__END;
e->e_private = &bdb->bi_cache.c_dntree;
bdb->bi_cache.c_dntree.bei_e = e;
/* monitor setup */
rc = bdb_monitor_db_open( be );
if ( rc != 0 ) {
goto fail;
}
bdb->bi_flags |= BDB_IS_OPEN;
return 0;
fail:
bdb_db_close( be, NULL );
return rc;
}
static int
bdb_db_close( BackendDB *be, ConfigReply *cr )
{
int rc;
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
struct bdb_db_info *db;
bdb_idl_cache_entry_t *entry, *next_entry;
/* monitor handling */
(void)bdb_monitor_db_close( be );
{
Entry *e = bdb->bi_cache.c_dntree.bei_e;
if ( e ) {
bdb->bi_cache.c_dntree.bei_e = NULL;
e->e_private = NULL;
bdb_entry_return( e );
}
}
bdb->bi_flags &= ~BDB_IS_OPEN;
ber_bvarray_free( bdb->bi_db_config );
bdb->bi_db_config = NULL;
if( bdb->bi_dbenv ) {
/* Free cache locker if we enabled locking.
* TXNs must all be closed before DBs...
*/
if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_cache.c_txn ) {
TXN_ABORT( bdb->bi_cache.c_txn );
bdb->bi_cache.c_txn = NULL;
}
bdb_reader_flush( bdb->bi_dbenv );
}
while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
db = bdb->bi_databases[bdb->bi_ndatabases];
rc = db->bdi_db->close( db->bdi_db, 0 );
/* Lower numbered names are not strdup'd */
if( bdb->bi_ndatabases >= BDB_NDB )
free( db->bdi_name.bv_val );
free( db );
}
free( bdb->bi_databases );
bdb->bi_databases = NULL;
bdb_cache_release_all (&bdb->bi_cache);
if ( bdb->bi_idl_cache_size ) {
avl_free( bdb->bi_idl_tree, NULL );
bdb->bi_idl_tree = NULL;
entry = bdb->bi_idl_lru_head;
do {
next_entry = entry->idl_lru_next;
if ( entry->idl )
free( entry->idl );
free( entry->kstr.bv_val );
free( entry );
entry = next_entry;
} while ( entry != bdb->bi_idl_lru_head );
bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
}
/* close db environment */
if( bdb->bi_dbenv ) {
/* force a checkpoint, but not if we were ReadOnly,
* and not in Quick mode since there are no transactions there.
*/
if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_close: database \"%s\": "
"txn_checkpoint failed: %s (%d).\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
}
}
rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
bdb->bi_dbenv = NULL;
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_close: database \"%s\": "
"close failed: %s (%d)\n",
be->be_suffix[0].bv_val, db_strerror(rc), rc );
return rc;
}
}
rc = alock_close( &bdb->bi_alock_info, slapMode & SLAP_TOOL_QUICK );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_close: database \"%s\": alock_close failed\n",
be->be_suffix[0].bv_val, 0, 0 );
return -1;
}
return 0;
}
static int
bdb_db_destroy( BackendDB *be, ConfigReply *cr )
{
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
/* stop and remove checkpoint task */
if ( bdb->bi_txn_cp_task ) {
struct re_s *re = bdb->bi_txn_cp_task;
bdb->bi_txn_cp_task = NULL;
ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
if ( ldap_pvt_runqueue_isrunning( &slapd_rq, re ) )
ldap_pvt_runqueue_stoptask( &slapd_rq, re );
ldap_pvt_runqueue_remove( &slapd_rq, re );
ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
}
/* monitor handling */
(void)bdb_monitor_db_destroy( be );
if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
bdb_attr_index_destroy( bdb );
ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_lru_mutex );
ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_count_mutex );
ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_eifree_mutex );
ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
#ifdef BDB_HIER
ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
#endif
ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
ch_free( bdb );
be->be_private = NULL;
return 0;
}
int
bdb_back_initialize(
BackendInfo *bi )
{
int rc;
static char *controls[] = {
LDAP_CONTROL_ASSERT,
LDAP_CONTROL_MANAGEDSAIT,
LDAP_CONTROL_NOOP,
LDAP_CONTROL_PAGEDRESULTS,
LDAP_CONTROL_PRE_READ,
LDAP_CONTROL_POST_READ,
LDAP_CONTROL_SUBENTRIES,
LDAP_CONTROL_X_PERMISSIVE_MODIFY,
#ifdef LDAP_X_TXN
LDAP_CONTROL_X_TXN_SPEC,
#endif
NULL
};
/* initialize the underlying database system */
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(bdb_back_initialize) ": initialize "
BDB_UCTYPE " backend\n", 0, 0, 0 );
bi->bi_flags |=
SLAP_BFLAG_INCREMENT |
SLAP_BFLAG_SUBENTRIES |
SLAP_BFLAG_ALIASES |
SLAP_BFLAG_REFERRALS;
bi->bi_controls = controls;
{ /* version check */
int major, minor, patch, ver;
char *version = db_version( &major, &minor, &patch );
#ifdef HAVE_EBCDIC
char v2[1024];
/* All our stdio does an ASCII to EBCDIC conversion on
* the output. Strings from the BDB library are already
* in EBCDIC; we have to go back and forth...
*/
strcpy( v2, version );
__etoa( v2 );
version = v2;
#endif
ver = (major << 24) | (minor << 16) | patch;
if( ver != DB_VERSION_FULL ) {
/* fail if a versions don't match */
Debug( LDAP_DEBUG_ANY,
LDAP_XSTRING(bdb_back_initialize) ": "
"BDB library version mismatch:"
" expected " DB_VERSION_STRING ","
" got %s\n", version, 0, 0 );
return -1;
}
Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
": %s\n", version, 0, 0 );
}
db_env_set_func_free( ber_memfree );
db_env_set_func_malloc( (db_malloc *)ber_memalloc );
db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
#if !defined(NO_THREAD) && DB_VERSION_FULL <= 0x04070000
/* This is a no-op on a NO_THREAD build. Leave the default
* alone so that BDB will sleep on interprocess conflicts.
* Don't bother on BDB 4.7...
*/
db_env_set_func_yield( ldap_pvt_thread_yield );
#endif
bi->bi_open = 0;
bi->bi_close = 0;
bi->bi_config = 0;
bi->bi_destroy = 0;
bi->bi_db_init = bdb_db_init;
bi->bi_db_config = config_generic_wrapper;
bi->bi_db_open = bdb_db_open;
bi->bi_db_close = bdb_db_close;
bi->bi_db_destroy = bdb_db_destroy;
bi->bi_op_add = bdb_add;
bi->bi_op_bind = bdb_bind;
bi->bi_op_compare = bdb_compare;
bi->bi_op_delete = bdb_delete;
bi->bi_op_modify = bdb_modify;
bi->bi_op_modrdn = bdb_modrdn;
bi->bi_op_search = bdb_search;
bi->bi_op_unbind = 0;
bi->bi_extended = bdb_extended;
bi->bi_chk_referrals = bdb_referrals;
bi->bi_operational = bdb_operational;
bi->bi_has_subordinates = bdb_hasSubordinates;
bi->bi_entry_release_rw = bdb_entry_release;
bi->bi_entry_get_rw = bdb_entry_get;
/*
* hooks for slap tools
*/
bi->bi_tool_entry_open = bdb_tool_entry_open;
bi->bi_tool_entry_close = bdb_tool_entry_close;
bi->bi_tool_entry_first = backend_tool_entry_first;
bi->bi_tool_entry_first_x = bdb_tool_entry_first_x;
bi->bi_tool_entry_next = bdb_tool_entry_next;
bi->bi_tool_entry_get = bdb_tool_entry_get;
bi->bi_tool_entry_put = bdb_tool_entry_put;
bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
bi->bi_tool_sync = 0;
bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
bi->bi_tool_entry_modify = bdb_tool_entry_modify;
bi->bi_tool_entry_delete = bdb_tool_entry_delete;
bi->bi_connection_init = 0;
bi->bi_connection_destroy = 0;
rc = bdb_back_init_cf( bi );
return rc;
}
#if (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
(SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
/* conditionally define the init_module() function */
#ifdef BDB_HIER
SLAP_BACKEND_INIT_MODULE( hdb )
#else /* !BDB_HIER */
SLAP_BACKEND_INIT_MODULE( bdb )
#endif /* !BDB_HIER */
#endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
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