2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2006 The OpenLDAP Foundation.
5 * Portions Copyright 2001-2003 Pierangelo Masarati.
6 * Portions Copyright 1999-2003 Howard Chu.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
13 * A copy of this license is available in the file LICENSE in the
14 * top-level directory of the distribution or, alternatively, at
15 * <http://www.OpenLDAP.org/license.html>.
18 * This work was initially developed by the Howard Chu for inclusion
19 * in OpenLDAP Software and subsequently enhanced by Pierangelo
28 #include <ac/socket.h>
29 #include <ac/string.h>
34 #include "../back-ldap/back-ldap.h"
35 #include "back-meta.h"
38 * Set PRINT_CONNTREE larger than 0 to dump the connection tree (debug only)
40 #ifndef PRINT_CONNTREE
41 #define PRINT_CONNTREE 0
42 #endif /* !PRINT_CONNTREE */
45 * meta_back_conndn_cmp
47 * compares two struct metaconn based on the value of the conn pointer
48 * and of the local DN; used by avl stuff
55 metaconn_t *mc1 = ( metaconn_t * )c1;
56 metaconn_t *mc2 = ( metaconn_t * )c2;
59 /* If local DNs don't match, it is definitely not a match */
60 /* For shared sessions, conn is NULL. Only explicitly
61 * bound sessions will have non-NULL conn.
63 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
65 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
72 * meta_back_conndnmc_cmp
74 * compares two struct metaconn based on the value of the conn pointer,
75 * the local DN and the struct pointer; used by avl stuff
78 meta_back_conndnmc_cmp(
82 metaconn_t *mc1 = ( metaconn_t * )c1;
83 metaconn_t *mc2 = ( metaconn_t * )c2;
86 /* If local DNs don't match, it is definitely not a match */
87 /* For shared sessions, conn is NULL. Only explicitly
88 * bound sessions will have non-NULL conn.
90 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
92 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
94 rc = SLAP_PTRCMP( mc1, mc2 );
104 * compares two struct metaconn based on the value of the conn pointer;
112 metaconn_t *mc1 = ( metaconn_t * )c1;
113 metaconn_t *mc2 = ( metaconn_t * )c2;
115 /* For shared sessions, conn is NULL. Only explicitly
116 * bound sessions will have non-NULL conn.
118 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
122 * meta_back_conndn_dup
124 * returns -1 in case a duplicate struct metaconn has been inserted;
128 meta_back_conndn_dup(
132 metaconn_t *mc1 = ( metaconn_t * )c1;
133 metaconn_t *mc2 = ( metaconn_t * )c2;
135 /* Cannot have more than one shared session with same DN */
136 if ( mc1->mc_conn == mc2->mc_conn &&
137 dn_match( &mc1->mc_local_ndn, &mc2->mc_local_ndn ) )
146 * Debug stuff (got it from libavl)
148 #if PRINT_CONNTREE > 0
150 ravl_print( Avlnode *root, int depth )
159 ravl_print( root->avl_right, depth + 1 );
161 for ( i = 0; i < depth; i++ ) {
162 fprintf( stderr, "-" );
165 mc = (metaconn_t *)root->avl_data;
166 fprintf( stderr, "mc=%p local=\"%s\" conn=%p %s refcnt=%d\n",
168 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
170 avl_bf2str( root->avl_bf ), mc->mc_refcnt );
172 ravl_print( root->avl_left, depth + 1 );
176 myprint( Avlnode *root, char *msg )
178 fprintf( stderr, "========> %s\n", msg );
181 fprintf( stderr, "\tNULL\n" );
184 ravl_print( root, 0 );
187 fprintf( stderr, "<======== %s\n", msg );
189 #endif /* PRINT_CONNTREE */
197 * Allocates a connection structure, making room for all the referenced targets
203 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
205 int i, ntargets = mi->mi_ntargets;
207 assert( ntargets > 0 );
209 /* malloc all in one */
210 mc = ( metaconn_t * )ch_malloc( sizeof( metaconn_t )
211 + sizeof( metasingleconn_t ) * ntargets );
216 for ( i = 0; i < ntargets; i++ ) {
217 mc->mc_conns[ i ].msc_ld = NULL;
218 BER_BVZERO( &mc->mc_conns[ i ].msc_bound_ndn );
219 BER_BVZERO( &mc->mc_conns[ i ].msc_cred );
220 mc->mc_conns[ i ].msc_mscflags = 0;
221 mc->mc_conns[ i ].msc_info = mi;
224 BER_BVZERO( &mc->mc_local_ndn );
225 mc->msc_mscflags = 0;
226 mc->mc_authz_target = META_BOUND_NONE;
237 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
239 assert( mc != NULL );
241 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
243 if ( --mc->mc_refcnt == 0 ) {
244 meta_back_conn_free( mc );
247 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
251 * meta_back_init_one_conn
253 * Initializes one connection
256 meta_back_init_one_conn(
263 ldap_back_send_t sendok )
265 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
266 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
269 int isauthz = ( candidate == mc->mc_authz_target );
272 #endif /* HAVE_TLS */
277 if ( msc->msc_ld != NULL ) {
278 return rs->sr_err = LDAP_SUCCESS;
281 msc->msc_mscflags = 0;
284 * Attempts to initialize the connection to the target ds
286 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
287 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
289 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
290 #endif /* HAVE_TLS */
291 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
292 if ( rs->sr_err != LDAP_SUCCESS ) {
297 * Set LDAP version. This will always succeed: If the client
298 * bound with a particular version, then so can we.
300 if ( mt->mt_version != 0 ) {
301 version = mt->mt_version;
303 } else if ( op->o_conn->c_protocol != 0 ) {
304 version = op->o_conn->c_protocol;
307 version = LDAP_VERSION3;
309 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
310 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
312 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
313 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
314 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
317 /* start TLS ("tls [try-]{start|propagate}" statement) */
318 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
321 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
323 * use asynchronous StartTLS; in case, chase referral
324 * FIXME: OpenLDAP does not return referral on StartTLS yet
328 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
329 if ( rs->sr_err == LDAP_SUCCESS ) {
330 LDAPMessage *res = NULL;
331 int rc, nretries = mt->mt_nretries;
334 LDAP_BACK_TV_SET( &tv );
337 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
339 rs->sr_err = LDAP_OTHER;
341 } else if ( rc == 0 ) {
342 if ( nretries != 0 ) {
343 if ( nretries > 0 ) {
346 LDAP_BACK_TV_SET( &tv );
349 rs->sr_err = LDAP_OTHER;
351 } else if ( rc == LDAP_RES_EXTENDED ) {
352 struct berval *data = NULL;
354 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
356 if ( rs->sr_err == LDAP_SUCCESS ) {
359 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
360 &err, NULL, NULL, NULL, NULL, 1 );
363 if ( rs->sr_err == LDAP_SUCCESS ) {
367 /* FIXME: in case a referral
368 * is returned, should we try
369 * using it instead of the
371 if ( rs->sr_err == LDAP_SUCCESS ) {
372 ldap_install_tls( msc->msc_ld );
374 } else if ( rs->sr_err == LDAP_REFERRAL ) {
375 rs->sr_err = LDAP_OTHER;
376 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
380 if ( data->bv_val ) {
381 ber_memfree( data->bv_val );
388 rs->sr_err = LDAP_OTHER;
395 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
397 * use synchronous StartTLS
399 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
400 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
402 /* if StartTLS is requested, only attempt it if the URL
403 * is not "ldaps://"; this may occur not only in case
404 * of misconfiguration, but also when used in the chain
405 * overlay, where the "uri" can be parsed out of a referral */
406 if ( rs->sr_err == LDAP_SERVER_DOWN
407 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
409 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
414 #endif /* HAVE_TLS */
417 * Set the network timeout if set
419 if ( mt->mt_network_timeout != 0 ) {
420 struct timeval network_timeout;
422 network_timeout.tv_usec = 0;
423 network_timeout.tv_sec = mt->mt_network_timeout;
425 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
426 (void *)&network_timeout );
430 * If the connection DN is not null, an attempt to rewrite it is made
434 if ( !BER_BVISNULL( &mt->mt_pseudorootdn ) ) {
435 ber_dupbv( &msc->msc_bound_ndn, &mt->mt_pseudorootdn );
436 if ( !BER_BVISNULL( &mt->mt_pseudorootpw ) ) {
437 ber_dupbv( &msc->msc_cred, &mt->mt_pseudorootpw );
441 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
444 LDAP_BACK_CONN_ISPRIV_SET( msc );
447 BER_BVZERO( &msc->msc_cred );
448 BER_BVZERO( &msc->msc_bound_ndn );
449 if ( !BER_BVISEMPTY( &op->o_ndn )
450 && SLAP_IS_AUTHZ_BACKEND( op )
454 dc.conn = op->o_conn;
459 * Rewrite the bind dn if needed
461 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
462 &msc->msc_bound_ndn ) )
464 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
469 /* copy the DN idf needed */
470 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
471 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
475 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
479 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
482 if ( rs->sr_err == LDAP_SUCCESS ) {
484 * Sets a cookie for the rewrite session
486 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
489 rs->sr_err = slap_map_api2result( rs );
490 if ( sendok & LDAP_BACK_SENDERR ) {
491 send_ldap_result( op, rs );
502 * Retries one connection
510 ldap_back_send_t sendok )
512 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
513 metatarget_t *mt = mi->mi_targets[ candidate ];
514 metaconn_t *mc = *mcp;
515 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
516 int rc = LDAP_UNAVAILABLE,
517 binding = LDAP_BACK_CONN_BINDING( msc );
519 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
521 assert( mc->mc_refcnt > 0 );
522 if ( mc->mc_refcnt == 1 ) {
523 if ( LogTest( LDAP_DEBUG_ANY ) ) {
524 char buf[ SLAP_TEXT_BUFLEN ];
526 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
527 snprintf( buf, sizeof( buf ),
528 "retrying URI=\"%s\" DN=\"%s\"",
530 BER_BVISNULL( &msc->msc_bound_ndn ) ?
531 "" : msc->msc_bound_ndn.bv_val );
532 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
534 Debug( LDAP_DEBUG_ANY,
535 "%s meta_back_retry[%d]: %s.\n",
536 op->o_log_prefix, candidate, buf );
539 meta_clear_one_candidate( msc );
540 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
542 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
544 /* mc here must be the regular mc, reset and ready for init */
545 rc = meta_back_init_one_conn( op, rs, mt, mc, candidate,
546 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
548 LDAP_BACK_CONN_BINDING_SET( msc );
551 if ( rc == LDAP_SUCCESS ) {
552 rc = meta_back_single_dobind( op, rs, mcp, candidate,
553 sendok, mt->mt_nretries, 0 );
555 Debug( LDAP_DEBUG_ANY,
556 "%s meta_back_retry[%d]: "
557 "meta_back_single_dobind=%d\n",
558 op->o_log_prefix, candidate, rc );
559 if ( rc == LDAP_SUCCESS ) {
560 if ( be_isroot( op ) ) {
561 LDAP_BACK_CONN_ISBOUND_SET( msc );
563 LDAP_BACK_CONN_ISANON_SET( msc );
569 if ( rc != LDAP_SUCCESS ) {
570 SlapReply *candidates = meta_back_candidates_get( op );
572 candidates[ candidate ].sr_err = rc;
574 if ( *mcp != NULL ) {
576 LDAP_BACK_CONN_BINDING_CLEAR( msc );
578 LDAP_BACK_CONN_TAINTED_SET( mc );
579 /* only release if mandatory; otherwise
580 * let the caller do what's best before
582 if ( META_BACK_ONERR_STOP( mi ) ) {
583 meta_back_release_conn_lock( op, mc, 0 );
591 send_ldap_result( op, rs );
595 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
597 return rc == LDAP_SUCCESS ? 1 : 0;
601 * callback for unique candidate selection
604 meta_back_conn_cb( Operation *op, SlapReply *rs )
606 assert( op->o_tag == LDAP_REQ_SEARCH );
608 switch ( rs->sr_type ) {
610 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
626 meta_back_get_candidate(
631 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
635 * tries to get a unique candidate
636 * (takes care of default target)
638 candidate = meta_back_select_unique_candidate( mi, ndn );
641 * if any is found, inits the connection
643 if ( candidate == META_TARGET_NONE ) {
644 rs->sr_err = LDAP_NO_SUCH_OBJECT;
645 rs->sr_text = "no suitable candidate target found";
647 } else if ( candidate == META_TARGET_MULTIPLE ) {
650 SlapReply rs2 = { 0 };
651 slap_callback cb2 = { 0 };
654 /* try to get a unique match for the request ndn
655 * among the multiple candidates available */
656 op2.o_tag = LDAP_REQ_SEARCH;
658 op2.o_req_ndn = *ndn;
659 op2.ors_scope = LDAP_SCOPE_BASE;
660 op2.ors_deref = LDAP_DEREF_NEVER;
661 op2.ors_attrs = slap_anlist_no_attrs;
662 op2.ors_attrsonly = 0;
663 op2.ors_limit = NULL;
665 op2.ors_tlimit = SLAP_NO_LIMIT;
667 f.f_choice = LDAP_FILTER_PRESENT;
668 f.f_desc = slap_schema.si_ad_objectClass;
670 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
672 op2.o_callback = &cb2;
673 cb2.sc_response = meta_back_conn_cb;
674 cb2.sc_private = (void *)&candidate;
676 rc = op->o_bd->be_search( &op2, &rs2 );
678 switch ( rs2.sr_err ) {
681 rs->sr_err = rs2.sr_err;
684 case LDAP_SIZELIMIT_EXCEEDED:
685 /* if multiple candidates can serve the operation,
686 * and a default target is defined, and it is
687 * a candidate, try using it (FIXME: YMMV) */
688 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
689 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ]->mt_nsuffix,
690 mi->mi_targets[ mi->mi_defaulttarget ]->mt_scope,
691 mi->mi_targets[ mi->mi_defaulttarget ]->mt_subtree_exclude,
692 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
694 candidate = mi->mi_defaulttarget;
695 rs->sr_err = LDAP_SUCCESS;
699 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
700 rs->sr_text = "cannot select unique candidate target";
706 rs->sr_err = LDAP_SUCCESS;
712 static void *meta_back_candidates_dummy;
715 meta_back_candidates_keyfree(
719 metacandidates_t *mc = (metacandidates_t *)data;
721 ber_memfree_x( mc->mc_candidates, NULL );
722 ber_memfree_x( data, NULL );
726 meta_back_candidates_get( Operation *op )
728 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
729 metacandidates_t *mc;
731 if ( op->o_threadctx ) {
734 ldap_pvt_thread_pool_getkey( op->o_threadctx,
735 &meta_back_candidates_dummy, &data, NULL );
736 mc = (metacandidates_t *)data;
739 mc = mi->mi_candidates;
743 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
744 mc->mc_ntargets = mi->mi_ntargets;
745 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
746 if ( op->o_threadctx ) {
750 ldap_pvt_thread_pool_setkey( op->o_threadctx,
751 &meta_back_candidates_dummy, data,
752 meta_back_candidates_keyfree );
755 mi->mi_candidates = mc;
758 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
759 /* NOTE: in the future, may want to allow back-config
760 * to add/remove targets from back-meta... */
761 mc->mc_candidates = ch_realloc( mc->mc_candidates,
762 sizeof( SlapReply ) * mi->mi_ntargets );
763 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
764 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
765 mc->mc_ntargets = mi->mi_ntargets;
768 return mc->mc_candidates;
774 * Prepares the connection structure
778 * - determine what DN is being requested:
780 * op requires candidate checks
782 * add unique parent of o_req_ndn
783 * bind unique^*[/all] o_req_ndn [no check]
784 * compare unique^+ o_req_ndn
785 * delete unique o_req_ndn
786 * modify unique o_req_ndn
787 * search any o_req_ndn
788 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
790 * - for ops that require the candidate to be unique, in case of multiple
791 * occurrences an internal search with sizeLimit=1 is performed
792 * if a unique candidate can actually be determined. If none is found,
793 * the operation aborts; if multiple are found, the default target
794 * is used if defined and candidate; otherwise the operation aborts.
796 * *^note: actually, the bind operation is handled much like a search;
797 * i.e. the bind is broadcast to all candidate targets.
799 * +^note: actually, the compare operation is handled much like a search;
800 * i.e. the compare is broadcast to all candidate targets, while checking
801 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
809 ldap_back_send_t sendok )
811 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
812 metaconn_t *mc = NULL,
814 int cached = META_TARGET_NONE,
815 i = META_TARGET_NONE,
821 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
825 META_DNTYPE_NEWPARENT
826 } dn_type = META_DNTYPE_ENTRY;
827 struct berval ndn = op->o_req_ndn,
830 SlapReply *candidates = meta_back_candidates_get( op );
832 /* Internal searches are privileged and shared. So is root. */
833 /* FIXME: there seem to be concurrency issues */
834 if ( op->o_do_not_cache || be_isroot( op ) ) {
835 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
836 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
837 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
840 mc_curr.mc_local_ndn = op->o_ndn;
842 /* Explicit binds must not be shared */
843 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
844 mc_curr.mc_conn = op->o_conn;
847 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
851 /* Explicit Bind requests always get their own conn */
852 if ( !( sendok & LDAP_BACK_BINDING ) ) {
853 /* Searches for a metaconn in the avl tree */
855 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
856 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
857 (caddr_t)&mc_curr, meta_back_conndn_cmp );
859 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
860 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
862 /* don't let anyone else use this expired connection */
863 (void)avl_delete( &mi->mi_conninfo.lai_tree,
864 (caddr_t)mc, meta_back_conndnmc_cmp );
865 LDAP_BACK_CONN_TAINTED_SET( mc );
867 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
868 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
871 /* Don't reuse connections while they're still binding */
872 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
873 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
874 ldap_pvt_thread_yield();
880 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
883 switch ( op->o_tag ) {
885 /* if we go to selection, the entry must not exist,
886 * and we must be able to resolve the parent */
887 dn_type = META_DNTYPE_PARENT;
888 dnParent( &ndn, &pndn );
891 case LDAP_REQ_MODRDN:
892 /* if nnewSuperior is not NULL, it must resolve
893 * to the same candidate as the req_ndn */
894 if ( op->orr_nnewSup ) {
895 dn_type = META_DNTYPE_NEWPARENT;
900 /* if bound as rootdn, the backend must bind to all targets
901 * with the administrative identity */
902 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
903 op_type = META_OP_REQUIRE_ALL;
907 case LDAP_REQ_DELETE:
908 case LDAP_REQ_MODIFY:
909 /* just a unique candidate */
912 case LDAP_REQ_COMPARE:
913 case LDAP_REQ_SEARCH:
914 /* allow multiple candidates for the searchBase */
915 op_type = META_OP_ALLOW_MULTIPLE;
919 /* right now, just break (exop?) */
924 * require all connections ...
926 if ( op_type == META_OP_REQUIRE_ALL ) {
928 /* Looks like we didn't get a bind. Open a new session... */
930 mc = metaconn_alloc( op );
931 mc->mc_conn = mc_curr.mc_conn;
932 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
934 if ( sendok & LDAP_BACK_BINDING ) {
935 LDAP_BACK_CONN_BINDING_SET( mc );
939 for ( i = 0; i < mi->mi_ntargets; i++ ) {
940 metatarget_t *mt = mi->mi_targets[ i ];
943 * The target is activated; if needed, it is
946 candidates[ i ].sr_err = meta_back_init_one_conn( op,
948 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
949 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
950 candidates[ i ].sr_tag = META_CANDIDATE;
956 * FIXME: in case one target cannot
957 * be init'd, should the other ones
960 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
961 err = candidates[ i ].sr_err;
966 if ( ncandidates == 0 ) {
968 meta_back_freeconn( op, mc );
971 meta_back_release_conn( op, mc );
974 rs->sr_err = LDAP_NO_SUCH_OBJECT;
975 rs->sr_text = "Unable to select valid candidates";
977 if ( sendok & LDAP_BACK_SENDERR ) {
978 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
979 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
981 send_ldap_result( op, rs );
983 rs->sr_matched = NULL;
993 * looks in cache, if any
995 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
996 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
999 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1000 metatarget_t *mt = NULL;
1001 metasingleconn_t *msc = NULL;
1005 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1006 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
1010 * tries to get a unique candidate
1011 * (takes care of default target)
1013 if ( i == META_TARGET_NONE ) {
1014 i = meta_back_get_candidate( op, rs, &ndn );
1016 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1017 i = meta_back_get_candidate( op, rs, &pndn );
1020 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1022 meta_back_release_conn( op, mc );
1025 if ( sendok & LDAP_BACK_SENDERR ) {
1026 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1027 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1029 send_ldap_result( op, rs );
1031 rs->sr_matched = NULL;
1038 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1041 meta_back_release_conn( op, mc );
1044 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1045 rs->sr_text = "cross-target rename not supported";
1046 if ( sendok & LDAP_BACK_SENDERR ) {
1047 send_ldap_result( op, rs );
1054 Debug( LDAP_DEBUG_TRACE,
1055 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1056 i, op->o_req_ndn.bv_val, 0 );
1059 /* Retries searching for a metaconn in the avl tree
1060 * the reason is that the connection might have been
1061 * created by meta_back_get_candidate() */
1062 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1064 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1065 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1066 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1068 /* Don't reuse connections while they're still binding */
1069 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1070 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1071 ldap_pvt_thread_yield();
1077 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1080 /* Looks like we didn't get a bind. Open a new session... */
1082 mc = metaconn_alloc( op );
1083 mc->mc_conn = mc_curr.mc_conn;
1084 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1086 if ( sendok & LDAP_BACK_BINDING ) {
1087 LDAP_BACK_CONN_BINDING_SET( mc );
1093 * Clear all other candidates
1095 ( void )meta_clear_unused_candidates( op, i );
1097 mt = mi->mi_targets[ i ];
1098 msc = &mc->mc_conns[ i ];
1101 * The target is activated; if needed, it is
1102 * also init'd. In case of error, meta_back_init_one_conn
1103 * sends the appropriate result.
1105 err = meta_back_init_one_conn( op, rs, mt, mc, i,
1106 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1107 if ( err != LDAP_SUCCESS ) {
1109 * FIXME: in case one target cannot
1110 * be init'd, should the other ones
1113 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1115 (void)meta_clear_one_candidate( msc );
1116 meta_back_freeconn( op, mc );
1119 meta_back_release_conn( op, mc );
1124 candidates[ i ].sr_err = LDAP_SUCCESS;
1125 candidates[ i ].sr_tag = META_CANDIDATE;
1133 * if no unique candidate ...
1137 /* Looks like we didn't get a bind. Open a new session... */
1139 mc = metaconn_alloc( op );
1140 mc->mc_conn = mc_curr.mc_conn;
1141 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1143 if ( sendok & LDAP_BACK_BINDING ) {
1144 LDAP_BACK_CONN_BINDING_SET( mc );
1148 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1149 metatarget_t *mt = mi->mi_targets[ i ];
1150 metasingleconn_t *msc = &mc->mc_conns[ i ];
1153 || meta_back_is_candidate( &mt->mt_nsuffix,
1155 mt->mt_subtree_exclude,
1157 LDAP_SCOPE_SUBTREE ) )
1161 * The target is activated; if needed, it is
1164 int lerr = meta_back_init_one_conn( op, rs,
1166 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1168 if ( lerr == LDAP_SUCCESS ) {
1169 candidates[ i ].sr_tag = META_CANDIDATE;
1170 candidates[ i ].sr_err = LDAP_SUCCESS;
1173 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1174 op->o_log_prefix, i, 0 );
1179 * FIXME: in case one target cannot
1180 * be init'd, should the other ones
1184 ( void )meta_clear_one_candidate( msc );
1186 /* leave the target candidate, but record the error for later use */
1187 candidates[ i ].sr_err = lerr;
1190 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1191 op->o_log_prefix, i, lerr );
1198 ( void )meta_clear_one_candidate( msc );
1200 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1204 if ( ncandidates == 0 ) {
1206 meta_back_freeconn( op, mc );
1209 meta_back_release_conn( op, mc );
1212 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1213 rs->sr_text = "Unable to select valid candidates";
1215 if ( sendok & LDAP_BACK_SENDERR ) {
1216 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1217 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1219 send_ldap_result( op, rs );
1221 rs->sr_matched = NULL;
1229 /* clear out meta_back_init_one_conn non-fatal errors */
1230 rs->sr_err = LDAP_SUCCESS;
1233 /* touch the timestamp */
1234 if ( mi->mi_idle_timeout != 0 ) {
1235 mc->mc_time = op->o_time;
1239 if ( mi->mi_conn_ttl ) {
1240 mc->mc_create_time = op->o_time;
1244 * Inserts the newly created metaconn in the avl tree
1246 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1247 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1248 meta_back_conndn_cmp, meta_back_conndn_dup );
1250 #if PRINT_CONNTREE > 0
1251 myprint( mi->mi_conninfo.lai_tree, "meta_back_getconn" );
1252 #endif /* PRINT_CONNTREE */
1254 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1257 * Err could be -1 in case a duplicate metaconn is inserted
1264 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1265 /* duplicate: free and try to get the newly created one */
1268 LDAP_BACK_CONN_TAINTED_SET( mc );
1272 Debug( LDAP_DEBUG_ANY,
1273 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1274 op->o_log_prefix, ncandidates,
1275 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1277 meta_back_freeconn( op, mc );
1279 rs->sr_err = LDAP_OTHER;
1280 rs->sr_text = "proxy bind collision";
1281 if ( sendok & LDAP_BACK_SENDERR ) {
1282 send_ldap_result( op, rs );
1288 Debug( LDAP_DEBUG_TRACE,
1289 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1290 op->o_log_prefix, ncandidates,
1291 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1294 Debug( LDAP_DEBUG_TRACE,
1295 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1296 op->o_log_prefix, ncandidates,
1297 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1304 meta_back_release_conn_lock(
1309 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1311 assert( mc != NULL );
1314 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1316 assert( mc->mc_refcnt > 0 );
1318 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1319 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1320 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld expired.\n",
1321 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1322 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1323 ( caddr_t )mc, meta_back_conndnmc_cmp );
1324 if ( mc->mc_refcnt == 0 ) {
1325 meta_clear_candidates( op, mc );
1326 meta_back_conn_free( mc );
1330 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );