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-rw-r--r--servers/slapd/backover.c1440
1 files changed, 1440 insertions, 0 deletions
diff --git a/servers/slapd/backover.c b/servers/slapd/backover.c
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+++ b/servers/slapd/backover.c
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+/* backover.c - backend overlay routines */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2021 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>.
+ */
+
+/* Functions to overlay other modules over a backend. */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#define SLAPD_TOOLS
+#include "slap.h"
+#include "config.h"
+
+static slap_overinst *overlays;
+
+static int
+over_db_config(
+ BackendDB *be,
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv
+)
+{
+ slap_overinfo *oi = be->bd_info->bi_private;
+ slap_overinst *on = oi->oi_list;
+ BackendInfo *bi_orig = be->bd_info;
+ struct ConfigOCs *be_cf_ocs = be->be_cf_ocs;
+ ConfigArgs ca = {0};
+ int rc = 0;
+
+ if ( oi->oi_orig->bi_db_config ) {
+ be->bd_info = oi->oi_orig;
+ be->be_cf_ocs = oi->oi_orig->bi_cf_ocs;
+ 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;
+ }
+
+ ca.argv = argv;
+ ca.argc = argc;
+ ca.fname = fname;
+ ca.lineno = lineno;
+ ca.be = be;
+ snprintf( ca.log, sizeof( ca.log ), "%s: line %d",
+ ca.fname, ca.lineno );
+ ca.op = SLAP_CONFIG_ADD;
+ ca.valx = -1;
+
+ for (; on; on=on->on_next) {
+ rc = SLAP_CONF_UNKNOWN;
+ if (on->on_bi.bi_cf_ocs) {
+ ConfigTable *ct;
+ ca.bi = &on->on_bi;
+ ct = config_find_keyword( on->on_bi.bi_cf_ocs->co_table, &ca );
+ if ( ct ) {
+ ca.table = on->on_bi.bi_cf_ocs->co_type;
+ rc = config_add_vals( ct, &ca );
+ if ( rc != SLAP_CONF_UNKNOWN )
+ break;
+ }
+ }
+ if (on->on_bi.bi_db_config && rc == SLAP_CONF_UNKNOWN) {
+ be->bd_info = &on->on_bi;
+ rc = on->on_bi.bi_db_config( be, fname, lineno,
+ argc, argv );
+ if ( rc != SLAP_CONF_UNKNOWN ) break;
+ }
+ }
+ be->bd_info = bi_orig;
+ be->be_cf_ocs = be_cf_ocs;
+
+ return rc;
+}
+
+static int
+over_db_open(
+ BackendDB *be,
+ ConfigReply *cr
+)
+{
+ slap_overinfo *oi = be->bd_info->bi_private;
+ slap_overinst *on = oi->oi_list;
+ BackendDB db = *be;
+ int rc = 0;
+
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ db.bd_info = oi->oi_orig;
+ if ( db.bd_info->bi_db_open ) {
+ rc = db.bd_info->bi_db_open( &db, cr );
+ }
+
+ for (; on && rc == 0; on=on->on_next) {
+ db.bd_info = &on->on_bi;
+ if ( db.bd_info->bi_db_open ) {
+ rc = db.bd_info->bi_db_open( &db, cr );
+ }
+ }
+
+ return rc;
+}
+
+static int
+over_db_close(
+ BackendDB *be,
+ ConfigReply *cr
+)
+{
+ 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, cr );
+ }
+ }
+
+ if ( oi->oi_orig->bi_db_close ) {
+ be->bd_info = oi->oi_orig;
+ rc = be->bd_info->bi_db_close( be, cr );
+ }
+
+ be->bd_info = bi_orig;
+ return rc;
+}
+
+static int
+over_db_destroy(
+ BackendDB *be,
+ ConfigReply *cr
+)
+{
+ slap_overinfo *oi = be->bd_info->bi_private;
+ slap_overinst *on = oi->oi_list, *next;
+ BackendInfo *bi_orig = be->bd_info;
+ int rc = 0;
+
+ be->bd_info = oi->oi_orig;
+ if ( be->bd_info->bi_db_destroy ) {
+ rc = be->bd_info->bi_db_destroy( be, cr );
+ }
+
+ for (; on && rc == 0; on=on->on_next) {
+ be->bd_info = &on->on_bi;
+ if ( be->bd_info->bi_db_destroy ) {
+ rc = be->bd_info->bi_db_destroy( be, cr );
+ }
+ }
+
+ on = oi->oi_list;
+ if ( on ) {
+ for (next = on->on_next; on; on=next) {
+ next = on->on_next;
+ free( on );
+ }
+ }
+ be->bd_info = bi_orig;
+ free( oi );
+ return rc;
+}
+
+static int
+over_back_response ( Operation *op, SlapReply *rs )
+{
+ slap_overinfo *oi = op->o_callback->sc_private;
+ slap_overinst *on = oi->oi_list;
+ 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 ) {
+ db.bd_info = (BackendInfo *)on;
+ rc = on->on_response( op, rs );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+ /* Bypass the remaining on_response layers, but allow
+ * normal execution to continue.
+ */
+ if ( rc == SLAP_CB_BYPASS )
+ rc = SLAP_CB_CONTINUE;
+ op->o_bd = be;
+ return rc;
+}
+
+static int
+over_access_allowed(
+ Operation *op,
+ Entry *e,
+ AttributeDescription *desc,
+ struct berval *val,
+ slap_access_t access,
+ AccessControlState *state,
+ slap_mask_t *maskp )
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendInfo *bi;
+ BackendDB *be = op->o_bd, db;
+ int rc = SLAP_CB_CONTINUE;
+
+ /* FIXME: used to happen for instance during abandon
+ * when global overlays are used... */
+ assert( op->o_bd != NULL );
+
+ bi = op->o_bd->bd_info;
+ /* Were we invoked on the frontend? */
+ if ( !bi->bi_access_allowed ) {
+ oi = frontendDB->bd_info->bi_private;
+ } else {
+ oi = op->o_bd->bd_info->bi_private;
+ }
+ on = oi->oi_list;
+
+ for ( ; on; on = on->on_next ) {
+ if ( on->on_bi.bi_access_allowed ) {
+ /* NOTE: do not copy the structure until required */
+ if ( !SLAP_ISOVERLAY( op->o_bd ) ) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_access_allowed( op, e,
+ desc, val, access, state, maskp );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( rc == SLAP_CB_CONTINUE ) {
+ BI_access_allowed *bi_access_allowed;
+
+ /* if the database structure was changed, o_bd points to a
+ * copy of the structure; put the original bd_info in place */
+ if ( SLAP_ISOVERLAY( op->o_bd ) ) {
+ op->o_bd->bd_info = oi->oi_orig;
+ }
+
+ if ( oi->oi_orig->bi_access_allowed ) {
+ bi_access_allowed = oi->oi_orig->bi_access_allowed;
+ } else {
+ bi_access_allowed = slap_access_allowed;
+ }
+
+ rc = bi_access_allowed( op, e,
+ desc, val, access, state, maskp );
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ /* access not allowed */
+ rc = 0;
+ }
+
+ op->o_bd = be;
+ op->o_bd->bd_info = bi;
+
+ return rc;
+}
+
+int
+overlay_entry_get_ov(
+ Operation *op,
+ struct berval *dn,
+ ObjectClass *oc,
+ AttributeDescription *ad,
+ int rw,
+ Entry **e,
+ slap_overinst *on )
+{
+ slap_overinfo *oi = on->on_info;
+ BackendDB *be = op->o_bd, db;
+ BackendInfo *bi = op->o_bd->bd_info;
+ int rc = SLAP_CB_CONTINUE;
+
+ for ( ; on; on = on->on_next ) {
+ if ( on->on_bi.bi_entry_get_rw ) {
+ /* NOTE: do not copy the structure until required */
+ if ( !SLAP_ISOVERLAY( op->o_bd ) ) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_entry_get_rw( op, dn,
+ oc, ad, rw, e );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( rc == SLAP_CB_CONTINUE ) {
+ /* if the database structure was changed, o_bd points to a
+ * copy of the structure; put the original bd_info in place */
+ if ( SLAP_ISOVERLAY( op->o_bd ) ) {
+ op->o_bd->bd_info = oi->oi_orig;
+ }
+
+ if ( oi->oi_orig->bi_entry_get_rw ) {
+ rc = oi->oi_orig->bi_entry_get_rw( op, dn,
+ oc, ad, rw, e );
+ }
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ }
+
+ op->o_bd = be;
+ op->o_bd->bd_info = bi;
+
+ return rc;
+}
+
+static int
+over_entry_get_rw(
+ Operation *op,
+ struct berval *dn,
+ ObjectClass *oc,
+ AttributeDescription *ad,
+ int rw,
+ Entry **e )
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+
+ assert( op->o_bd != NULL );
+
+ oi = op->o_bd->bd_info->bi_private;
+ on = oi->oi_list;
+
+ return overlay_entry_get_ov( op, dn, oc, ad, rw, e, on );
+}
+
+int
+overlay_entry_release_ov(
+ Operation *op,
+ Entry *e,
+ int rw,
+ slap_overinst *on )
+{
+ slap_overinfo *oi = on->on_info;
+ BackendDB *be = op->o_bd, db;
+ BackendInfo *bi = op->o_bd->bd_info;
+ int rc = SLAP_CB_CONTINUE;
+
+ for ( ; on; on = on->on_next ) {
+ if ( on->on_bi.bi_entry_release_rw ) {
+ /* NOTE: do not copy the structure until required */
+ if ( !SLAP_ISOVERLAY( op->o_bd ) ) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_entry_release_rw( op, e, rw );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( rc == SLAP_CB_CONTINUE ) {
+ /* if the database structure was changed, o_bd points to a
+ * copy of the structure; put the original bd_info in place */
+ if ( SLAP_ISOVERLAY( op->o_bd ) ) {
+ op->o_bd->bd_info = oi->oi_orig;
+ }
+
+ if ( oi->oi_orig->bi_entry_release_rw ) {
+ rc = oi->oi_orig->bi_entry_release_rw( op, e, rw );
+ }
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ entry_free( e );
+ rc = 0;
+ }
+
+ op->o_bd = be;
+ op->o_bd->bd_info = bi;
+
+ return rc;
+}
+
+static int
+over_entry_release_rw(
+ Operation *op,
+ Entry *e,
+ int rw )
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+
+ assert( op->o_bd != NULL );
+
+ oi = op->o_bd->bd_info->bi_private;
+ on = oi->oi_list;
+
+ return overlay_entry_release_ov( op, e, rw, on );
+}
+
+static int
+over_acl_group(
+ Operation *op,
+ Entry *e,
+ struct berval *gr_ndn,
+ struct berval *op_ndn,
+ ObjectClass *group_oc,
+ AttributeDescription *group_at )
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendInfo *bi;
+ BackendDB *be = op->o_bd, db;
+ int rc = SLAP_CB_CONTINUE;
+
+ /* FIXME: used to happen for instance during abandon
+ * when global overlays are used... */
+ assert( be != NULL );
+
+ bi = be->bd_info;
+ oi = bi->bi_private;
+ on = oi->oi_list;
+
+ for ( ; on; on = on->on_next ) {
+ if ( on->on_bi.bi_acl_group ) {
+ /* NOTE: do not copy the structure until required */
+ if ( !SLAP_ISOVERLAY( op->o_bd ) ) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_acl_group( op, e,
+ gr_ndn, op_ndn, group_oc, group_at );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( rc == SLAP_CB_CONTINUE ) {
+ BI_acl_group *bi_acl_group;
+
+ /* if the database structure was changed, o_bd points to a
+ * copy of the structure; put the original bd_info in place */
+ if ( SLAP_ISOVERLAY( op->o_bd ) ) {
+ op->o_bd->bd_info = oi->oi_orig;
+ }
+
+ if ( oi->oi_orig->bi_acl_group ) {
+ bi_acl_group = oi->oi_orig->bi_acl_group;
+ } else {
+ bi_acl_group = backend_group;
+ }
+
+ rc = bi_acl_group( op, e,
+ gr_ndn, op_ndn, group_oc, group_at );
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ /* access not allowed */
+ rc = 0;
+ }
+
+ op->o_bd = be;
+ op->o_bd->bd_info = bi;
+
+ return rc;
+}
+
+static int
+over_acl_attribute(
+ Operation *op,
+ Entry *target,
+ struct berval *entry_ndn,
+ AttributeDescription *entry_at,
+ BerVarray *vals,
+ slap_access_t access )
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendInfo *bi;
+ BackendDB *be = op->o_bd, db;
+ int rc = SLAP_CB_CONTINUE;
+
+ /* FIXME: used to happen for instance during abandon
+ * when global overlays are used... */
+ assert( be != NULL );
+
+ bi = be->bd_info;
+ oi = bi->bi_private;
+ on = oi->oi_list;
+
+ for ( ; on; on = on->on_next ) {
+ if ( on->on_bi.bi_acl_attribute ) {
+ /* NOTE: do not copy the structure until required */
+ if ( !SLAP_ISOVERLAY( op->o_bd ) ) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_acl_attribute( op, target,
+ entry_ndn, entry_at, vals, access );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( rc == SLAP_CB_CONTINUE ) {
+ BI_acl_attribute *bi_acl_attribute;
+
+ /* if the database structure was changed, o_bd points to a
+ * copy of the structure; put the original bd_info in place */
+ if ( SLAP_ISOVERLAY( op->o_bd ) ) {
+ op->o_bd->bd_info = oi->oi_orig;
+ }
+
+ if ( oi->oi_orig->bi_acl_attribute ) {
+ bi_acl_attribute = oi->oi_orig->bi_acl_attribute;
+ } else {
+ bi_acl_attribute = backend_attribute;
+ }
+
+ rc = bi_acl_attribute( op, target,
+ entry_ndn, entry_at, vals, access );
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ /* access not allowed */
+ rc = 0;
+ }
+
+ op->o_bd = be;
+ op->o_bd->bd_info = bi;
+
+ return rc;
+}
+
+int
+overlay_callback_after_backover( Operation *op, slap_callback *sc, int append )
+{
+ slap_callback **scp;
+
+ for ( scp = &op->o_callback; *scp != NULL; scp = &(*scp)->sc_next ) {
+ if ( (*scp)->sc_response == over_back_response ) {
+ sc->sc_next = (*scp)->sc_next;
+ (*scp)->sc_next = sc;
+ return 0;
+ }
+ }
+
+ if ( append ) {
+ *scp = sc;
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * default return code in case of missing backend function
+ * and overlay stack returning SLAP_CB_CONTINUE
+ */
+static int op_rc[ op_last ] = {
+ 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 */
+};
+
+int overlay_op_walk(
+ Operation *op,
+ SlapReply *rs,
+ slap_operation_t which,
+ slap_overinfo *oi,
+ slap_overinst *on
+)
+{
+ BI_op_bind **func;
+ int rc = SLAP_CB_CONTINUE;
+
+ for (; on; on=on->on_next ) {
+ func = &on->on_bi.bi_op_bind;
+ if ( func[which] ) {
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = func[which]( op, rs );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+ if ( rc == SLAP_CB_BYPASS )
+ rc = SLAP_CB_CONTINUE;
+
+ /* if an overlay halted processing, make sure
+ * any previously set cleanup handlers are run
+ */
+ if ( rc != SLAP_CB_CONTINUE )
+ goto cleanup;
+
+ func = &oi->oi_orig->bi_op_bind;
+ if ( func[which] ) {
+ 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 = op_rc[ which ];
+ }
+
+ /* The underlying backend didn't handle the request, make sure
+ * overlay cleanup is processed.
+ */
+ if ( rc == LDAP_UNWILLING_TO_PERFORM ) {
+ slap_callback *sc_next;
+cleanup:
+ for ( ; op->o_callback && op->o_callback->sc_response !=
+ over_back_response; op->o_callback = sc_next ) {
+ sc_next = op->o_callback->sc_next;
+ if ( op->o_callback->sc_cleanup ) {
+ op->o_callback->sc_cleanup( op, rs );
+ }
+ }
+ }
+ return rc;
+}
+
+static int
+over_op_func(
+ Operation *op,
+ SlapReply *rs,
+ slap_operation_t which
+)
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendDB *be = op->o_bd, db;
+ slap_callback cb = {NULL, over_back_response, NULL, NULL}, **sc;
+ int rc = SLAP_CB_CONTINUE;
+
+ /* 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;
+
+ rc = overlay_op_walk( op, rs, which, oi, on );
+ for ( sc = &op->o_callback; *sc; sc = &(*sc)->sc_next ) {
+ if ( *sc == &cb ) {
+ *sc = cb.sc_next;
+ break;
+ }
+ }
+
+ op->o_bd = be;
+ return rc;
+}
+
+static int
+over_op_bind( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_bind );
+}
+
+static int
+over_op_unbind( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_unbind );
+}
+
+static int
+over_op_search( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_search );
+}
+
+static int
+over_op_compare( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_compare );
+}
+
+static int
+over_op_modify( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_modify );
+}
+
+static int
+over_op_modrdn( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_modrdn );
+}
+
+static int
+over_op_add( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_add );
+}
+
+static int
+over_op_delete( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_delete );
+}
+
+static int
+over_op_abandon( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_abandon );
+}
+
+static int
+over_op_cancel( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_cancel );
+}
+
+static int
+over_op_extended( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_extended );
+}
+
+static int
+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 );
+}
+
+enum conn_which {
+ conn_init = 0,
+ conn_destroy,
+ conn_last
+};
+
+static int
+over_connection_func(
+ BackendDB *bd,
+ Connection *conn,
+ enum conn_which which
+)
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendDB db;
+ int rc = SLAP_CB_CONTINUE;
+ BI_connection_init **func;
+
+ /* 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 ) {
+ func = &on->on_bi.bi_connection_init;
+ if ( func[ which ] ) {
+ bd->bd_info = (BackendInfo *)on;
+ rc = func[ which ]( bd, conn );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ func = &oi->oi_orig->bi_connection_init;
+ if ( func[ which ] && rc == SLAP_CB_CONTINUE ) {
+ bd->bd_info = oi->oi_orig;
+ rc = func[ which ]( bd, conn );
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ }
+
+ return rc;
+}
+
+static int
+over_connection_init(
+ BackendDB *bd,
+ Connection *conn
+)
+{
+ return over_connection_func( bd, conn, conn_init );
+}
+
+static int
+over_connection_destroy(
+ BackendDB *bd,
+ Connection *conn
+)
+{
+ return over_connection_func( bd, conn, conn_destroy );
+}
+
+int
+overlay_register(
+ slap_overinst *on
+)
+{
+ slap_overinst *tmp;
+
+ /* FIXME: check for duplicates? */
+ for ( tmp = overlays; tmp != NULL; tmp = tmp->on_next ) {
+ if ( strcmp( on->on_bi.bi_type, tmp->on_bi.bi_type ) == 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "overlay_register(\"%s\"): "
+ "name already in use.\n",
+ on->on_bi.bi_type, 0, 0 );
+ return -1;
+ }
+
+ if ( on->on_bi.bi_obsolete_names != NULL ) {
+ int i;
+
+ for ( i = 0; on->on_bi.bi_obsolete_names[ i ] != NULL; i++ ) {
+ if ( strcmp( on->on_bi.bi_obsolete_names[ i ], tmp->on_bi.bi_type ) == 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "overlay_register(\"%s\"): "
+ "obsolete name \"%s\" already in use "
+ "by overlay \"%s\".\n",
+ on->on_bi.bi_type,
+ on->on_bi.bi_obsolete_names[ i ],
+ tmp->on_bi.bi_type );
+ return -1;
+ }
+ }
+ }
+
+ if ( tmp->on_bi.bi_obsolete_names != NULL ) {
+ int i;
+
+ for ( i = 0; tmp->on_bi.bi_obsolete_names[ i ] != NULL; i++ ) {
+ int j;
+
+ if ( strcmp( on->on_bi.bi_type, tmp->on_bi.bi_obsolete_names[ i ] ) == 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "overlay_register(\"%s\"): "
+ "name already in use "
+ "as obsolete by overlay \"%s\".\n",
+ on->on_bi.bi_type,
+ tmp->on_bi.bi_obsolete_names[ i ], 0 );
+ return -1;
+ }
+
+ if ( on->on_bi.bi_obsolete_names != NULL ) {
+ for ( j = 0; on->on_bi.bi_obsolete_names[ j ] != NULL; j++ ) {
+ if ( strcmp( on->on_bi.bi_obsolete_names[ j ], tmp->on_bi.bi_obsolete_names[ i ] ) == 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "overlay_register(\"%s\"): "
+ "obsolete name \"%s\" already in use "
+ "as obsolete by overlay \"%s\".\n",
+ on->on_bi.bi_type,
+ on->on_bi.bi_obsolete_names[ j ],
+ tmp->on_bi.bi_type );
+ return -1;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ on->on_next = overlays;
+ overlays = 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
+)
+{
+ if ( on == NULL ) {
+ return overlays;
+ }
+
+ 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 != NULL );
+
+ for ( ; on; on = on->on_next ) {
+ if ( strcmp( on->on_bi.bi_type, over_type ) == 0 ) {
+ goto foundit;
+ }
+
+ if ( on->on_bi.bi_obsolete_names != NULL ) {
+ int i;
+
+ for ( i = 0; on->on_bi.bi_obsolete_names[ i ] != NULL; i++ ) {
+ if ( strcmp( on->on_bi.bi_obsolete_names[ i ], over_type ) == 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "overlay_find(\"%s\"): "
+ "obsolete name for \"%s\".\n",
+ on->on_bi.bi_obsolete_names[ i ],
+ on->on_bi.bi_type, 0 );
+ goto foundit;
+ }
+ }
+ }
+ }
+
+foundit:;
+ 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 != NULL );
+
+ 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 gotit = 0;
+ int cid;
+
+ if ( slap_find_control_id( oid, &cid ) == LDAP_CONTROL_NOT_FOUND ) {
+ return -1;
+ }
+
+ if ( SLAP_ISGLOBALOVERLAY( be ) ) {
+ BackendDB *bd;
+
+ /* add to all backends... */
+ LDAP_STAILQ_FOREACH( bd, &backendDB, be_next ) {
+ if ( bd == be->bd_self ) {
+ gotit = 1;
+ }
+
+ /* overlays can be instanciated multiple times, use
+ * be_ctrls[ cid ] as an instance counter, so that the
+ * overlay's controls are only really disabled after the
+ * last instance called overlay_register_control() */
+ bd->be_ctrls[ cid ]++;
+ bd->be_ctrls[ SLAP_MAX_CIDS ] = 1;
+ }
+
+ }
+
+ if ( !gotit ) {
+ /* overlays can be instanciated multiple times, use
+ * be_ctrls[ cid ] as an instance counter, so that the
+ * overlay's controls are only really unregistered after the
+ * last instance called overlay_register_control() */
+ be->bd_self->be_ctrls[ cid ]++;
+ be->bd_self->be_ctrls[ SLAP_MAX_CIDS ] = 1;
+ }
+
+ return 0;
+}
+
+#ifdef SLAP_CONFIG_DELETE
+void
+overlay_unregister_control( BackendDB *be, const char *oid )
+{
+ int gotit = 0;
+ int cid;
+
+ if ( slap_find_control_id( oid, &cid ) == LDAP_CONTROL_NOT_FOUND ) {
+ return;
+ }
+
+ if ( SLAP_ISGLOBALOVERLAY( be ) ) {
+ BackendDB *bd;
+
+ /* remove from all backends... */
+ LDAP_STAILQ_FOREACH( bd, &backendDB, be_next ) {
+ if ( bd == be->bd_self ) {
+ gotit = 1;
+ }
+
+ bd->be_ctrls[ cid ]--;
+ }
+ }
+
+ if ( !gotit ) {
+ be->bd_self->be_ctrls[ cid ]--;
+ }
+}
+#endif /* SLAP_CONFIG_DELETE */
+
+void
+overlay_destroy_one( BackendDB *be, slap_overinst *on )
+{
+ slap_overinfo *oi = on->on_info;
+ slap_overinst **oidx;
+
+ for ( oidx = &oi->oi_list; *oidx; oidx = &(*oidx)->on_next ) {
+ if ( *oidx == on ) {
+ *oidx = on->on_next;
+ if ( on->on_bi.bi_db_destroy ) {
+ BackendInfo *bi_orig = be->bd_info;
+ be->bd_info = (BackendInfo *)on;
+ on->on_bi.bi_db_destroy( be, NULL );
+ be->bd_info = bi_orig;
+ }
+ free( on );
+ break;
+ }
+ }
+}
+
+#ifdef SLAP_CONFIG_DELETE
+typedef struct ov_remove_ctx {
+ BackendDB *be;
+ slap_overinst *on;
+} ov_remove_ctx;
+
+int
+overlay_remove_cb( Operation *op, SlapReply *rs )
+{
+ ov_remove_ctx *rm_ctx = (ov_remove_ctx*) op->o_callback->sc_private;
+ BackendInfo *bi_orig = rm_ctx->be->bd_info;
+
+ rm_ctx->be->bd_info = (BackendInfo*) rm_ctx->on;
+
+ if ( rm_ctx->on->on_bi.bi_db_close ) {
+ rm_ctx->on->on_bi.bi_db_close( rm_ctx->be, NULL );
+ }
+ if ( rm_ctx->on->on_bi.bi_db_destroy ) {
+ rm_ctx->on->on_bi.bi_db_destroy( rm_ctx->be, NULL );
+ }
+
+ /* clean up after removing last overlay */
+ if ( ! rm_ctx->on->on_info->oi_list ) {
+ /* reset db flags and bd_info to orig */
+ SLAP_DBFLAGS( rm_ctx->be ) &= ~SLAP_DBFLAG_GLOBAL_OVERLAY;
+ rm_ctx->be->bd_info = rm_ctx->on->on_info->oi_orig;
+ ch_free(rm_ctx->on->on_info);
+ } else {
+ rm_ctx->be->bd_info = bi_orig;
+ }
+ free( rm_ctx->on );
+ op->o_tmpfree(rm_ctx, op->o_tmpmemctx);
+ return SLAP_CB_CONTINUE;
+}
+
+void
+overlay_remove( BackendDB *be, slap_overinst *on, Operation *op )
+{
+ slap_overinfo *oi = on->on_info;
+ slap_overinst **oidx;
+ ov_remove_ctx *rm_ctx;
+ slap_callback *rm_cb, *cb;
+
+ /* remove overlay from oi_list */
+ for ( oidx = &oi->oi_list; *oidx; oidx = &(*oidx)->on_next ) {
+ if ( *oidx == on ) {
+ *oidx = on->on_next;
+ break;
+ }
+ }
+
+ /* The db_close and db_destroy handlers to cleanup a release
+ * the overlay's resources are called from the cleanup callback
+ */
+ rm_ctx = op->o_tmpalloc( sizeof( ov_remove_ctx ), op->o_tmpmemctx );
+ rm_ctx->be = be;
+ rm_ctx->on = on;
+
+ rm_cb = op->o_tmpalloc( sizeof( slap_callback ), op->o_tmpmemctx );
+ rm_cb->sc_next = NULL;
+ rm_cb->sc_cleanup = overlay_remove_cb;
+ rm_cb->sc_response = NULL;
+ rm_cb->sc_private = (void*) rm_ctx;
+ rm_cb->sc_writewait = NULL;
+
+ /* Append callback to the end of the list */
+ if ( !op->o_callback ) {
+ op->o_callback = rm_cb;
+ } else {
+ for ( cb = op->o_callback; cb->sc_next; cb = cb->sc_next );
+ cb->sc_next = rm_cb;
+ }
+}
+#endif /* SLAP_CONFIG_DELETE */
+
+void
+overlay_insert( BackendDB *be, slap_overinst *on2, slap_overinst ***prev,
+ int idx )
+{
+ slap_overinfo *oi = (slap_overinfo *)be->bd_info;
+
+ if ( idx == -1 ) {
+ on2->on_next = oi->oi_list;
+ oi->oi_list = on2;
+ } else {
+ int i, novs;
+ slap_overinst *on, **prev;
+
+ /* Since the list is in reverse order and is singly linked,
+ * we have to count the overlays and then insert backwards.
+ * Adding on overlay at a specific point should be a pretty
+ * infrequent occurrence.
+ */
+ novs = 0;
+ for ( on = oi->oi_list; on; on=on->on_next )
+ novs++;
+
+ if (idx > novs)
+ idx = 0;
+ else
+ idx = novs - idx;
+
+ /* advance to insertion point */
+ prev = &oi->oi_list;
+ for ( i=0; i<idx; i++ ) {
+ on = *prev;
+ prev = &on->on_next;
+ }
+ /* insert */
+ on2->on_next = *prev;
+ *prev = on2;
+ }
+}
+
+void
+overlay_move( BackendDB *be, slap_overinst *on, int idx )
+{
+ slap_overinfo *oi = (slap_overinfo *)be->bd_info;
+ slap_overinst **onp;
+
+ for (onp = &oi->oi_list; *onp; onp= &(*onp)->on_next) {
+ if ( *onp == on ) {
+ *onp = on->on_next;
+ break;
+ }
+ }
+ overlay_insert( be, on, &onp, idx );
+}
+
+/* add an overlay to a particular backend. */
+int
+overlay_config( BackendDB *be, const char *ov, int idx, BackendInfo **res, ConfigReply *cr )
+{
+ slap_overinst *on = NULL, *on2 = NULL, **prev;
+ slap_overinfo *oi = NULL;
+ BackendInfo *bi = NULL;
+
+ if ( res )
+ *res = NULL;
+
+ 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 ( !overlay_is_over( be ) ) {
+ int isglobal = 0;
+
+ /* 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 ( be->bd_info == frontendDB->bd_info || SLAP_ISGLOBALOVERLAY( be ) ) {
+ isglobal = 1;
+ if ( on->on_bi.bi_flags & SLAPO_BFLAG_DBONLY ) {
+ snprintf( cr->msg, sizeof( cr->msg ), "overlay_config(): "
+ "overlay \"%s\" cannot be global.", ov );
+ Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
+ return 1;
+ }
+
+ } else if ( on->on_bi.bi_flags & SLAPO_BFLAG_GLOBONLY ) {
+ snprintf( cr->msg, sizeof( cr->msg ), "overlay_config(): "
+ "overlay \"%s\" can only be global.", ov );
+ Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
+ return 1;
+ }
+
+ oi = ch_malloc( sizeof( slap_overinfo ) );
+ oi->oi_orig = be->bd_info;
+ oi->oi_bi = *be->bd_info;
+ oi->oi_origdb = be;
+
+ if ( isglobal ) {
+ 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;
+
+ bi->bi_type = (char *)overtype;
+
+ bi->bi_db_config = over_db_config;
+ bi->bi_db_open = over_db_open;
+ bi->bi_db_close = over_db_close;
+ bi->bi_db_destroy = over_db_destroy;
+
+ bi->bi_op_bind = over_op_bind;
+ bi->bi_op_unbind = over_op_unbind;
+ bi->bi_op_search = over_op_search;
+ bi->bi_op_compare = over_op_compare;
+ bi->bi_op_modify = over_op_modify;
+ bi->bi_op_modrdn = over_op_modrdn;
+ bi->bi_op_add = over_op_add;
+ bi->bi_op_delete = over_op_delete;
+ bi->bi_op_abandon = over_op_abandon;
+ bi->bi_op_cancel = over_op_cancel;
+
+ bi->bi_extended = over_op_extended;
+
+ /*
+ * this is fine because it has the same
+ * args of the operations; we need to rework
+ * all the hooks to share the same args
+ * of the operations...
+ */
+ bi->bi_operational = over_aux_operational;
+ bi->bi_chk_referrals = over_aux_chk_referrals;
+ bi->bi_chk_controls = over_aux_chk_controls;
+
+ /* these have specific arglists */
+ bi->bi_entry_get_rw = over_entry_get_rw;
+ bi->bi_entry_release_rw = over_entry_release_rw;
+ bi->bi_access_allowed = over_access_allowed;
+ bi->bi_acl_group = over_acl_group;
+ bi->bi_acl_attribute = over_acl_attribute;
+
+ bi->bi_connection_init = over_connection_init;
+ bi->bi_connection_destroy = over_connection_destroy;
+
+ be->bd_info = bi;
+
+ } else {
+ if ( overlay_is_inst( be, ov ) ) {
+ if ( on->on_bi.bi_flags & SLAPO_BFLAG_SINGLE ) {
+ snprintf( cr->msg, sizeof( cr->msg ), "overlay_config(): "
+ "overlay \"%s\" already in list", ov );
+ Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
+ return 1;
+ }
+ }
+
+ oi = be->bd_info->bi_private;
+ }
+
+ /* Insert new overlay into list. By default overlays are
+ * added to head of list and executed in LIFO order.
+ */
+ on2 = ch_calloc( 1, sizeof(slap_overinst) );
+ *on2 = *on;
+ on2->on_info = oi;
+
+ prev = &oi->oi_list;
+ /* Do we need to find the insertion point? */
+ if ( idx >= 0 ) {
+ int i;
+
+ /* count current overlays */
+ for ( i=0, on=oi->oi_list; on; on=on->on_next, i++ );
+
+ /* are we just appending a new one? */
+ if ( idx >= i )
+ idx = -1;
+ }
+ overlay_insert( be, on2, &prev, idx );
+
+ /* Any initialization needed? */
+ if ( on2->on_bi.bi_db_init ) {
+ int rc;
+ be->bd_info = (BackendInfo *)on2;
+ rc = on2->on_bi.bi_db_init( be, cr);
+ be->bd_info = (BackendInfo *)oi;
+ if ( rc ) {
+ *prev = on2->on_next;
+ ch_free( on2 );
+ on2 = NULL;
+ return rc;
+ }
+ }
+
+ if ( res )
+ *res = &on2->on_bi;
+
+ return 0;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 12:56:57 +0000