#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>
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.lru_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_table = be->bd_info->bi_cf_table;
+ be->be_cf_ocs = be->bd_info->bi_cf_ocs;
return 0;
}
-static void *
-bdb_checkpoint( void *ctx, void *arg )
+/*
+ * Unconditionally perform a database recovery. Only works on
+ * databases that were previously opened with transactions and
+ * logs enabled.
+ */
+static int
+bdb_do_recovery( BackendDB *be )
{
- 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 );
- return NULL;
+ struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+ DB_ENV *re_dbenv;
+ u_int32_t flags;
+ int rc;
+ char path[MAXPATHLEN], *ptr;
+
+ /* Create and init the recovery environment */
+ rc = db_env_create( &re_dbenv, 0 );
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_do_recovery: db_env_create failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+ re_dbenv->set_errpfx( re_dbenv, be->be_suffix[0].bv_val );
+ re_dbenv->set_errcall( re_dbenv, bdb_errcall );
+ (void)re_dbenv->set_verbose(re_dbenv, DB_VERB_RECOVERY, 1);
+#if DB_VERSION_FULL < 0x04030000
+ (void)re_dbenv->set_verbose(re_dbenv, DB_VERB_CHKPOINT, 1);
+#else
+ re_dbenv->set_msgcall( re_dbenv, bdb_msgcall );
+#endif
+
+ flags = DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL |
+ DB_INIT_TXN | DB_USE_ENVIRON | DB_RECOVER;
+
+ /* If a key was set, use shared memory for the BDB environment */
+ if ( bdb->bi_shm_key ) {
+ re_dbenv->set_shm_key( re_dbenv, bdb->bi_shm_key );
+ flags |= DB_SYSTEM_MEM;
+ }
+
+ /* Open the environment, which will also perform the recovery */
+#ifdef HAVE_EBCDIC
+ strcpy( path, bdb->bi_dbenv_home );
+ __atoe( path );
+ rc = re_dbenv->open( re_dbenv,
+ path,
+ flags,
+ bdb->bi_dbenv_mode );
+#else
+ rc = re_dbenv->open( re_dbenv,
+ bdb->bi_dbenv_home,
+ flags,
+ bdb->bi_dbenv_mode );
+#endif
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_do_recovery: dbenv_open failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+ (void) re_dbenv->close( re_dbenv, 0 );
+
+ /* By convention we reset the mtime for id2entry.bdb to the current time */
+ ptr = lutil_strcopy( path, bdb->bi_dbenv_home);
+ *ptr++ = LDAP_DIRSEP[0];
+ strcpy( ptr, bdbi_databases[0].file);
+ (void) utime( path, NULL);
+
+ return 0;
+}
+
+/*
+ * Database recovery logic:
+ * This function is called whenever the database appears to have been
+ * shut down uncleanly, as determined by the alock functions.
+ * Because of the -q function in slapadd, there is also the possibility
+ * that the shutdown happened when transactions weren't being used and
+ * the database is likely to be corrupt. The function checks for this
+ * condition by examining the environment to make sure it had previously
+ * been opened with transactions enabled. If this is the case, the
+ * database is recovered as usual. If transactions were not enabled,
+ * then this function will return a fail.
+ */
+static int
+bdb_db_recover( BackendDB *be )
+{
+ struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+ DB_ENV *re_dbenv;
+ u_int32_t flags;
+ int rc;
+#ifdef HAVE_EBCDIC
+ char path[MAXPATHLEN];
+#endif
+
+ /* Create the recovery environment, then open it.
+ * We use the DB_JOIN in combination with a flags value of
+ * zero so we join an existing environment and can read the
+ * value of the flags that were used the last time the
+ * environment was opened. DB_CREATE is added because the
+ * open would fail if the only thing that had been done
+ * was an open with transactions and logs disabled.
+ */
+ rc = db_env_create( &re_dbenv, 0 );
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_recover: db_env_create failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+ re_dbenv->set_errpfx( re_dbenv, be->be_suffix[0].bv_val );
+ re_dbenv->set_errcall( re_dbenv, bdb_errcall );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "bdb_db_recover: dbenv_open(%s)\n",
+ bdb->bi_dbenv_home, 0, 0);
+
+#ifdef HAVE_EBCDIC
+ strcpy( path, bdb->bi_dbenv_home );
+ __atoe( path );
+ rc = re_dbenv->open( re_dbenv,
+ path,
+ DB_JOINENV,
+ bdb->bi_dbenv_mode );
+#else
+ rc = re_dbenv->open( re_dbenv,
+ bdb->bi_dbenv_home,
+ DB_JOINENV,
+ bdb->bi_dbenv_mode );
+#endif
+
+ if( rc == ENOENT ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "bdb_db_recover: DB environment files are missing, assuming it was "
+ "manually recovered\n", 0, 0, 0 );
+ return 0;
+ }
+ else if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_recover: dbenv_open failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+
+ /*
+ * Check the flags that had been used in the previous open.
+ * The environment needed to have had both
+ * DB_INIT_LOG and DB_INIT_TXN set for us to be willing to
+ * recover the database. Otherwise the an app failed while running
+ * without transactions and logs enabled and the dn2id and id2entry
+ * mapping is likely to be corrupt.
+ */
+ rc = re_dbenv->get_open_flags( re_dbenv, &flags );
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_recover: get_open_flags failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+
+ (void) re_dbenv->close( re_dbenv, 0 );
+
+ if( (flags & DB_INIT_LOG) && (flags & DB_INIT_TXN) ) {
+ return bdb_do_recovery( be );
+ }
+
+re_exit:
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_recover: Database cannot be recovered. "\
+ "Restore from backup!\n", 0, 0, 0);
+ return -1;
+
}
+
static int
bdb_db_open( BackendDB *be )
{
int rc, i;
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+ struct stat stat1, stat2;
u_int32_t flags;
-#ifdef HAVE_EBCDIC
char path[MAXPATHLEN];
-#endif
+ char *ptr;
Debug( LDAP_DEBUG_ARGS,
"bdb_db_open: %s\n",
return -1;
}
#endif
- /* we should check existance of dbenv_home and db_directory */
- rc = db_env_create( &bdb->bi_dbenv, 0 );
- if( rc != 0 ) {
+ /* Check existence of dbenv_home. Any error means trouble */
+ rc = stat( bdb->bi_dbenv_home, &stat1 );
+ if( rc !=0 ) {
Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: db_env_create failed: %s (%d)\n",
- db_strerror(rc), rc, 0 );
- return rc;
+ "bdb_db_open: Cannot access database directory %s (%d)\n",
+ bdb->bi_dbenv_home, errno, 0 );
+ return -1;
}
-
- flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
-
- if ( !( slapMode & SLAP_TOOL_QUICK ))
- flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN;
- rc = alock_open( &bdb->bi_alock_info, "slapd", bdb->bi_dbenv_home,
- slapMode & SLAP_TOOL_READONLY ? ALOCK_LOCKED : ALOCK_UNIQUE );
+ /* Perform database use arbitration/recovery logic */
+ rc = alock_open( &bdb->bi_alock_info,
+ "slapd",
+ bdb->bi_dbenv_home,
+ slapMode & SLAP_TOOL_READONLY ?
+ ALOCK_LOCKED : ALOCK_UNIQUE );
+
if( rc == ALOCK_RECOVER ) {
Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: alock_open: recovery required\n", 0, 0, 0 );
- flags |= DB_RECOVER;
+ "bdb_db_open: unclean shutdown detected;"
+ " attempting recovery.\n",
+ 0, 0, 0 );
+ if( bdb_db_recover( be ) != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_open: DB recovery failed.\n",
+ 0, 0, 0 );
+ return -1;
+ }
+ if( alock_recover (&bdb->bi_alock_info) != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_open: alock_recover failed\n",
+ 0, 0, 0 );
+ return -1;
+ }
+
} else if( rc == ALOCK_BUSY ) {
Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: alock_open: database in use\n", 0, 0, 0 );
+ "bdb_db_open: database already in use\n",
+ 0, 0, 0 );
return -1;
} else if( rc != ALOCK_CLEAN ) {
Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: alock_open: database unstable\n", 0, 0, 0 );
+ "bdb_db_open: alock package is unstable\n",
+ 0, 0, 0 );
return -1;
}
+
+ /*
+ * 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 ) {
+ ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
+ *ptr++ = LDAP_DIRSEP[0];
+ strcpy( ptr, bdbi_databases[0].file);
+ if( stat( path, &stat2 ) == 0 ) {
+ if( stat2.st_mtime <= stat1.st_mtime ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
+ "Performing database recovery to activate new settings.\n",
+ be->be_suffix[0].bv_val, 0, 0 );
+ if( bdb_do_recovery( be ) != 0) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_open: db recovery failed.\n",
+ 0, 0, 0 );
+ return -1;
+ }
+ }
+
+ }
+ }
+ else {
+ Debug( LDAP_DEBUG_ANY,
+ "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 );
+ }
+
+ flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
+ if ( !( slapMode & SLAP_TOOL_QUICK ))
+ flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN;
+
+ rc = db_env_create( &bdb->bi_dbenv, 0 );
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_open: db_env_create failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
/* If a key was set, use shared memory for the BDB environment */
if ( bdb->bi_shm_key ) {
if ( bdb->bi_idl_cache_max_size ) {
bdb->bi_idl_tree = NULL;
- ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
- ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
bdb->bi_idl_cache_size = 0;
}
-#ifdef BDB_SUBDIRS
- {
- char dir[MAXPATHLEN], *ptr;
-
- if (bdb->bi_dbenv_home[0] == '.') {
- /* If home is a relative path, relative subdirs
- * are just concat'd by BDB. We don't want the
- * path to be concat'd twice, e.g.
- * ./test-db/./test-db/tmp
- */
- ptr = dir;
- } else {
- ptr = lutil_strcopy( dir, bdb->bi_dbenv_home );
- *ptr++ = LDAP_DIRSEP[0];
-#ifdef HAVE_EBCDIC
- __atoe( dir );
-#endif
- }
-
- strcpy( ptr, BDB_TMP_SUBDIR );
-#ifdef HAVE_EBCDIC
- __atoe( ptr );
-#endif
- rc = bdb->bi_dbenv->set_tmp_dir( bdb->bi_dbenv, dir );
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: set_tmp_dir(%s) failed: %s (%d)\n",
- dir, db_strerror(rc), rc );
- return rc;
- }
-
- strcpy( ptr, BDB_LG_SUBDIR );
-#ifdef HAVE_EBCDIC
- __atoe( ptr );
-#endif
- rc = bdb->bi_dbenv->set_lg_dir( bdb->bi_dbenv, dir );
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: set_lg_dir(%s) failed: %s (%d)\n",
- dir, db_strerror(rc), rc );
- return rc;
- }
-
- strcpy( ptr, BDB_DATA_SUBDIR );
-#ifdef HAVE_EBCDIC
- __atoe( ptr );
-#endif
- rc = bdb->bi_dbenv->set_data_dir( bdb->bi_dbenv, dir );
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: set_data_dir(%s) failed: %s (%d)\n",
- dir, db_strerror(rc), rc );
- return rc;
- }
- }
-#endif
-
if( bdb->bi_dbenv_xflags != 0 ) {
rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
bdb->bi_dbenv_xflags, 1);
db_strerror(rc), rc, 0 );
return rc;
}
- if( flags & DB_RECOVER ) {
- rc = alock_recover (&bdb->bi_alock_info);
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "bdb_db_open: unable to alock_recover\n", 0, 0, 0 );
- return -1;
- }
- }
flags = DB_THREAD | bdb->bi_db_opflags;
XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
}
- /* 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 &&
- bdb->bi_txn_cp_min ) {
- ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
- ldap_pvt_runqueue_insert( &slapd_rq, bdb->bi_txn_cp_min*60,
- bdb_checkpoint, bdb );
- ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
- }
-
- if ( slapMode & SLAP_SERVER_MODE && bdb->bi_db_has_config ) {
- char buf[SLAP_TEXT_BUFLEN];
- FILE *f = fopen( bdb->bi_db_config_path, "r" );
- struct berval bv;
-
- if ( f ) {
- while ( fgets( buf, sizeof(buf), f )) {
- ber_str2bv( buf, 0, 1, &bv );
- if ( bv.bv_val[bv.bv_len-1] == '\n' ) {
- bv.bv_len--;
- bv.bv_val[bv.bv_len] = '\0';
- }
- /* shouldn't need this, but ... */
- if ( bv.bv_val[bv.bv_len-1] == '\r' ) {
- bv.bv_len--;
- bv.bv_val[bv.bv_len] = '\0';
- }
- ber_bvarray_add( &bdb->bi_db_config, &bv );
- }
- fclose( f );
- } else {
- /* Eh? It disappeared between config and open?? */
- bdb->bi_db_has_config = 0;
- }
-
- }
- bdb->bi_db_is_open = 1;
+ bdb->bi_flags |= BDB_IS_OPEN;
return 0;
}
struct bdb_db_info *db;
bdb_idl_cache_entry_t *entry, *next_entry;
- bdb->bi_db_is_open = 0;
+ /* backend_shutdown closes everything, even if not all were opened */
+ if ( !bdb->bi_flags & BDB_IS_OPEN )
+ return 0;
+
+ bdb->bi_flags &= ~BDB_IS_OPEN;
ber_bvarray_free( bdb->bi_db_config );
+ bdb->bi_db_config = NULL;
- while( bdb->bi_ndatabases-- ) {
+ 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 */
free( db );
}
free( bdb->bi_databases );
- bdb_attr_index_destroy( bdb->bi_attrs );
+ bdb->bi_databases = NULL;
bdb_cache_release_all (&bdb->bi_cache);
if ( bdb->bi_idl_cache_max_size ) {
ldap_pvt_thread_rdwr_wlock ( &bdb->bi_idl_tree_rwlock );
avl_free( bdb->bi_idl_tree, NULL );
+ bdb->bi_idl_tree = NULL;
entry = bdb->bi_idl_lru_head;
while ( entry != NULL ) {
next_entry = entry->idl_lru_next;
free( entry );
entry = next_entry;
}
+ bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
ldap_pvt_thread_rdwr_wunlock ( &bdb->bi_idl_tree_rwlock );
}
- if ( !( slapMode & SLAP_TOOL_QUICK )) {
+ if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_dbenv ) {
XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
+ bdb->bi_cache.c_locker = 0;
}
- return 0;
-}
-
-static int
-bdb_db_destroy( BackendDB *be )
-{
- int rc;
- struct bdb_info *bdb = (struct bdb_info *) be->be_private;
-
/* close db environment */
if( bdb->bi_dbenv ) {
- /* force a checkpoint */
- if ( !( slapMode & SLAP_TOOL_QUICK )) {
+ /* 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_destroy: txn_checkpoint failed: %s (%d)\n",
+ "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
}
}
bdb->bi_dbenv = NULL;
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
- "bdb_db_destroy: close failed: %s (%d)\n",
+ "bdb_db_close: close failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
return rc;
}
+
+#if DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 2
+ /* Delete the environment if we were in quick mode. This
+ * works around a bug in bdb4.2 that interferes with the
+ * operation of db_stat and other tools after a slapadd -q
+ * or slapindex -q has taken place.
+ */
+ if( slapMode & SLAP_TOOL_QUICK ) {
+ rc = db_env_create( &bdb->bi_dbenv, 0 );
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_close: db_env_create failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+ rc = bdb->bi_dbenv->remove(bdb->bi_dbenv, bdb->bi_dbenv_home,
+ DB_FORCE);
+ bdb->bi_dbenv = NULL;
+ if( rc != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "bdb_db_close: dbenv_remove failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
+ return rc;
+ }
+ }
+#endif
}
rc = alock_close( &bdb->bi_alock_info );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
- "bdb_db_destroy: alock_close failed\n", 0, 0, 0 );
+ "bdb_db_close: alock_close failed\n", 0, 0, 0 );
return -1;
}
+ return 0;
+}
+
+static int
+bdb_db_destroy( BackendDB *be )
+{
+ struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+
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->bi_attrs );
+
ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_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 );
- if ( bdb->bi_idl_cache_max_size ) {
- ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
- ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
- }
+ 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;
projects / openldap / blobdiff