/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
- * Copyright 2003-2004 The OpenLDAP Foundation.
+ * Copyright 2003-2005 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
enum db_which which
)
{
- slap_overinfo *oi = (slap_overinfo *) be->bd_info;
+ slap_overinfo *oi = be->bd_info->bi_private;
slap_overinst *on = oi->oi_list;
+ BackendInfo *bi_orig = be->bd_info;
BI_db_open **func;
int rc = 0;
rc = func[which]( be );
}
}
- be->bd_info = (BackendInfo *)oi;
+ be->bd_info = bi_orig;
return rc;
}
char **argv
)
{
- slap_overinfo *oi = (slap_overinfo *) be->bd_info;
+ slap_overinfo *oi = be->bd_info->bi_private;
slap_overinst *on = oi->oi_list;
+ BackendInfo *bi_orig = be->bd_info;
int rc = 0;
if ( oi->oi_orig->bi_db_config ) {
be->bd_info = oi->oi_orig;
rc = oi->oi_orig->bi_db_config( be, fname, lineno,
argc, argv );
+
+ if ( be->bd_info != oi->oi_orig ) {
+ slap_overinfo *oi2;
+ slap_overinst *on2, **onp;
+ BackendDB be2 = *be;
+ int i;
+
+ /* a database added an overlay;
+ * work it around... */
+ assert( overlay_is_over( be ) );
+
+ oi2 = ( slap_overinfo * )be->bd_info->bi_private;
+ on2 = oi2->oi_list;
+
+ /* need to put a uniqueness check here as well;
+ * note that in principle there could be more than
+ * one overlay as a result of multiple calls to
+ * overlay_config() */
+ be2.bd_info = (BackendInfo *)oi;
+
+ for ( i = 0, onp = &on2; *onp; i++, onp = &(*onp)->on_next ) {
+ if ( overlay_is_inst( &be2, (*onp)->on_bi.bi_type ) ) {
+ Debug( LDAP_DEBUG_ANY, "over_db_config(): "
+ "warning, freshly added "
+ "overlay #%d \"%s\" is already in list\n",
+ i, (*onp)->on_bi.bi_type, 0 );
+
+ /* NOTE: if the overlay already exists,
+ * there is no way to merge the results
+ * of the configuration that may have
+ * occurred during bi_db_config(); we
+ * just issue a warning, and the
+ * administrator should deal with this */
+ }
+ }
+ *onp = oi->oi_list;
+
+ oi->oi_list = on2;
+
+ ch_free( be->bd_info );
+ }
+
be->bd_info = (BackendInfo *)oi;
if ( rc != SLAP_CONF_UNKNOWN ) return rc;
}
if ( rc != SLAP_CONF_UNKNOWN ) break;
}
}
- be->bd_info = (BackendInfo *)oi;
+ be->bd_info = bi_orig;
return rc;
}
BackendDB *be
)
{
- return over_db_func( be, db_close );
+ slap_overinfo *oi = be->bd_info->bi_private;
+ slap_overinst *on = oi->oi_list;
+ BackendInfo *bi_orig = be->bd_info;
+ int rc = 0;
+
+ for (; on && rc == 0; on=on->on_next) {
+ be->bd_info = &on->on_bi;
+ if ( be->bd_info->bi_db_close ) {
+ rc = be->bd_info->bi_db_close( be );
+ }
+ }
+
+ if ( oi->oi_orig->bi_db_close ) {
+ be->bd_info = oi->oi_orig;
+ rc = be->bd_info->bi_db_close( be );
+ }
+
+ be->bd_info = bi_orig;
+ return rc;
}
static int
BackendDB *be
)
{
- slap_overinfo *oi = (slap_overinfo *) be->bd_info;
+ slap_overinfo *oi = be->bd_info->bi_private;
slap_overinst *on = oi->oi_list, *next;
int rc;
int rc = SLAP_CB_CONTINUE;
BackendDB *be = op->o_bd, db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
op->o_bd = &db;
for (; on; on=on->on_next ) {
if ( on->on_response ) {
op_abandon,
op_cancel,
op_extended,
+ op_aux_operational,
op_aux_chk_referrals,
+ op_aux_chk_controls,
op_last
};
+/*
+ * default return code in case of missing backend function
+ * and overlay stack returning SLAP_CB_CONTINUE
+ */
+static int op_rc[] = {
+ LDAP_UNWILLING_TO_PERFORM, /* bind */
+ LDAP_UNWILLING_TO_PERFORM, /* unbind */
+ LDAP_UNWILLING_TO_PERFORM, /* search */
+ SLAP_CB_CONTINUE, /* compare; pass to frontend */
+ LDAP_UNWILLING_TO_PERFORM, /* modify */
+ LDAP_UNWILLING_TO_PERFORM, /* modrdn */
+ LDAP_UNWILLING_TO_PERFORM, /* add */
+ LDAP_UNWILLING_TO_PERFORM, /* delete */
+ LDAP_UNWILLING_TO_PERFORM, /* abandon */
+ LDAP_UNWILLING_TO_PERFORM, /* cancel */
+ LDAP_UNWILLING_TO_PERFORM, /* extended */
+ LDAP_SUCCESS, /* aux_operational */
+ LDAP_SUCCESS, /* aux_chk_referrals */
+ SLAP_CB_CONTINUE /* aux_chk_controls; pass to frontend */
+};
+
static int
over_op_func(
Operation *op,
enum op_which which
)
{
- slap_overinfo *oi = (slap_overinfo *) op->o_bd->bd_info;
- slap_overinst *on = oi->oi_list;
+ slap_overinfo *oi;
+ slap_overinst *on;
BI_op_bind **func;
- BackendDB *be = op->o_bd, db = *op->o_bd;
+ BackendDB *be = op->o_bd, db;
slap_callback cb = {NULL, over_back_response, NULL, NULL};
int rc = SLAP_CB_CONTINUE;
- op->o_bd = &db;
+ /* FIXME: used to happen for instance during abandon
+ * when global overlays are used... */
+ assert( op->o_bd != NULL );
+
+ oi = op->o_bd->bd_info->bi_private;
+ on = oi->oi_list;
+
+ if ( !SLAP_ISOVERLAY( op->o_bd )) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
cb.sc_next = op->o_callback;
cb.sc_private = oi;
op->o_callback = &cb;
for (; on; on=on->on_next ) {
func = &on->on_bi.bi_op_bind;
if ( func[which] ) {
- db.bd_info = (BackendInfo *)on;
+ op->o_bd->bd_info = (BackendInfo *)on;
rc = func[which]( op, rs );
if ( rc != SLAP_CB_CONTINUE ) break;
}
}
- op->o_bd = be;
func = &oi->oi_orig->bi_op_bind;
if ( func[which] && rc == SLAP_CB_CONTINUE ) {
+ op->o_bd->bd_info = oi->oi_orig;
rc = func[which]( op, rs );
}
/* should not fall thru this far without anything happening... */
if ( rc == SLAP_CB_CONTINUE ) {
- rc = LDAP_UNWILLING_TO_PERFORM;
+ rc = op_rc[ which ];
}
+ op->o_bd = be;
op->o_callback = cb.sc_next;
return rc;
}
}
static int
-over_chk_referrals( Operation *op, SlapReply *rs )
+over_aux_operational( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_aux_operational );
+}
+
+static int
+over_aux_chk_referrals( Operation *op, SlapReply *rs )
{
return over_op_func( op, rs, op_aux_chk_referrals );
}
+static int
+over_aux_chk_controls( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_aux_chk_controls );
+}
+
+static int
+over_connection_destroy(
+ BackendDB *bd,
+ Connection *conn
+)
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendDB db;
+ int rc = SLAP_CB_CONTINUE;
+
+ /* FIXME: used to happen for instance during abandon
+ * when global overlays are used... */
+ assert( bd != NULL );
+
+ oi = bd->bd_info->bi_private;
+ on = oi->oi_list;
+
+ if ( !SLAP_ISOVERLAY( bd )) {
+ db = *bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ bd = &db;
+ }
+
+ for (; on; on=on->on_next ) {
+ if ( on->on_bi.bi_connection_destroy ) {
+ bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_connection_destroy( bd, conn );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( oi->oi_orig->bi_connection_destroy && rc == SLAP_CB_CONTINUE ) {
+ bd->bd_info = oi->oi_orig;
+ rc = oi->oi_orig->bi_connection_destroy( bd, conn );
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ }
+
+ return rc;
+}
+
int
overlay_register(
slap_overinst *on
return 0;
}
+/*
+ * iterator on registered overlays; overlay_next( NULL ) returns the first
+ * overlay; * subsequent calls with the previously returned value allow to
+ * iterate * over the entire list; returns NULL when no more overlays are
+ * registered.
+ */
+
slap_overinst *
overlay_next(
slap_overinst *on
return on->on_next;
}
+/*
+ * returns a specific registered overlay based on the type; NULL if not
+ * registered.
+ */
+
+slap_overinst *
+overlay_find( const char *over_type )
+{
+ slap_overinst *on = overlays;
+
+ assert( over_type );
+
+ for ( ; on; on = on->on_next ) {
+ if ( strcmp( on->on_bi.bi_type, over_type ) == 0 ) {
+ break;
+ }
+ }
+
+ return on;
+}
+
static const char overtype[] = "over";
+/*
+ * returns TRUE (1) if the database is actually an overlay instance;
+ * FALSE (0) otherwise.
+ */
+
+int
+overlay_is_over( BackendDB *be )
+{
+ return be->bd_info->bi_type == overtype;
+}
+
+/*
+ * returns TRUE (1) if the given database is actually an overlay
+ * instance and, somewhere in the list, contains the requested overlay;
+ * FALSE (0) otherwise.
+ */
+
+int
+overlay_is_inst( BackendDB *be, const char *over_type )
+{
+ slap_overinst *on;
+
+ assert( be );
+
+ if ( !overlay_is_over( be ) ) {
+ return 0;
+ }
+
+ on = ((slap_overinfo *)be->bd_info->bi_private)->oi_list;
+ for ( ; on; on = on->on_next ) {
+ if ( strcmp( on->on_bi.bi_type, over_type ) == 0 ) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int
+overlay_register_control( BackendDB *be, const char *oid )
+{
+ int rc = 0;
+ int gotit = 0;
+ int cid;
+
+ if ( slap_find_control_id( oid, &cid ) == LDAP_CONTROL_NOT_FOUND ) {
+ return -1;
+ }
+
+ if ( SLAP_DBFLAGS( be ) & SLAP_DBFLAG_GLOBAL_OVERLAY ) {
+ int i;
+
+ /* add to all backends... */
+ for ( i = 0; i < nBackendDB; i++ ) {
+ BackendDB *bd = &backendDB[i];
+
+ if ( be == bd ) {
+ gotit = 1;
+ }
+
+ bd->be_ctrls[ cid ] = 1;
+ bd->be_ctrls[ SLAP_MAX_CIDS ] = 1;
+ }
+
+ }
+
+ if ( rc == 0 && !gotit ) {
+ be->be_ctrls[ cid ] = 1;
+ be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
+ }
+
+ return rc;
+}
+
/* add an overlay to a particular backend. */
int
overlay_config( BackendDB *be, const char *ov )
{
- slap_overinst *on = NULL, *on2 = NULL, *prev = NULL;
+ slap_overinst *on = NULL, *on2 = NULL;
slap_overinfo *oi = NULL;
BackendInfo *bi = NULL;
- for ( on = overlays; on; on=on->on_next ) {
- if (!strcmp( ov, on->on_bi.bi_type ) )
- break;
- }
- if (!on) {
- Debug( LDAP_DEBUG_ANY, "overlay %s not found\n", ov, 0, 0 );
+ on = overlay_find( ov );
+ if ( !on ) {
+ Debug( LDAP_DEBUG_ANY, "overlay \"%s\" not found\n", ov, 0, 0 );
return 1;
}
/* If this is the first overlay on this backend, set up the
* overlay info structure
*/
- if ( be->bd_info->bi_type != overtype ) {
- oi = ch_malloc( sizeof(slap_overinfo) );
+ if ( !overlay_is_over( be ) ) {
+ oi = ch_malloc( sizeof( slap_overinfo ) );
oi->oi_orig = be->bd_info;
oi->oi_bi = *be->bd_info;
+
+ /* NOTE: the first time a global overlay is configured,
+ * frontendDB gets this flag; it is used later by overlays
+ * to determine if they're stacked on top of the frontendDB */
+ if ( oi->oi_orig == frontendDB->bd_info ) {
+ SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_GLOBAL_OVERLAY;
+ }
+
+ /* Save a pointer to ourself in bi_private.
+ */
+ oi->oi_bi.bi_private = oi;
oi->oi_list = NULL;
bi = (BackendInfo *)oi;
* all the hooks to share the same args
* of the operations...
*/
- bi->bi_chk_referrals = over_chk_referrals;
+ bi->bi_operational = over_aux_operational;
+ bi->bi_chk_referrals = over_aux_chk_referrals;
+ bi->bi_chk_controls = over_aux_chk_controls;
+
+ bi->bi_connection_destroy = over_connection_destroy;
be->bd_info = bi;
} else {
- oi = (slap_overinfo *) be->bd_info;
- }
+ if ( overlay_is_inst( be, ov ) ) {
+ Debug( LDAP_DEBUG_ANY, "overlay_config(): "
+ "warning, overlay \"%s\" "
+ "already in list\n", ov, 0, 0 );
+ }
-#if 0
- /* Walk to the end of the list of overlays, add the new
- * one onto the end
- */
- for ( prev=NULL, on2 = oi->oi_list; on2; prev=on2, on2=on2->on_next );
- on2 = ch_calloc( 1, sizeof(slap_overinst) );
- if ( !prev ) {
- oi->oi_list = on2;
- } else {
- prev->on_next = on2;
+ oi = be->bd_info->bi_private;
}
- *on2 = *on;
- on2->on_next = NULL;
- on2->on_info = oi;
-#else
+
/* Insert new overlay on head of list. Overlays are executed
* in reverse of config order...
*/
on2->on_info = oi;
on2->on_next = oi->oi_list;
oi->oi_list = on2;
-#endif
/* Any initialization needed? */
if ( on->on_bi.bi_db_init ) {
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