2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2005 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 #define PRINT_CONNTREE 0
45 * compares two struct metaconn based on the value of the conn pointer;
53 metaconn_t *mc1 = ( metaconn_t * )c1;
54 metaconn_t *mc2 = ( metaconn_t * )c2;
57 /* If local DNs don't match, it is definitely not a match */
58 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
63 /* For shared sessions, conn is NULL. Only explicitly
64 * bound sessions will have non-NULL conn.
66 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
72 * returns -1 in case a duplicate struct metaconn has been inserted;
80 metaconn_t *mc1 = ( metaconn_t * )c1;
81 metaconn_t *mc2 = ( metaconn_t * )c2;
83 /* Cannot have more than one shared session with same DN */
84 if ( dn_match( &mc1->mc_local_ndn, &mc2->mc_local_ndn ) &&
85 mc1->mc_conn == mc2->mc_conn )
94 * Debug stuff (got it from libavl)
96 #if PRINT_CONNTREE > 0
98 ravl_print( Avlnode *root, int depth )
101 metaconn_t *mc = (metaconn_t *)root->avl_data;
107 ravl_print( root->avl_right, depth + 1 );
109 for ( i = 0; i < depth; i++ ) {
113 printf( "c(%d%s%s) %d\n",
114 LDAP_BACK_PCONN_ID( mc->mc_conn ),
115 BER_BVISNULL( &mc->mc_local_ndn ) ? "" : ": ",
116 BER_BVISNULL( &mc->mc_local_ndn ) ? "" : mc->mc_local_ndn.bv_val,
119 ravl_print( root->avl_left, depth + 1 );
123 myprint( Avlnode *root )
125 printf( "********\n" );
128 printf( "\tNULL\n" );
130 ravl_print( root, 0 );
133 printf( "********\n" );
135 #endif /* PRINT_CONNTREE */
143 * Allocates a connection structure, making room for all the referenced targets
149 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
151 int i, ntargets = mi->mi_ntargets;
153 assert( ntargets > 0 );
155 /* malloc all in one */
156 mc = ( metaconn_t * )ch_malloc( sizeof( metaconn_t )
157 + sizeof( metasingleconn_t ) * ntargets );
162 for ( i = 0; i < ntargets; i++ ) {
163 mc->mc_conns[ i ].msc_ld = NULL;
164 BER_BVZERO( &mc->mc_conns[ i ].msc_bound_ndn );
165 BER_BVZERO( &mc->mc_conns[ i ].msc_cred );
166 LDAP_BACK_CONN_ISBOUND_CLEAR( &mc->mc_conns[ i ] );
167 mc->mc_conns[ i ].msc_info = mi;
170 BER_BVZERO( &mc->mc_local_ndn );
171 mc->msc_mscflags = 0;
172 mc->mc_authz_target = META_BOUND_NONE;
173 ldap_pvt_thread_mutex_init( &mc->mc_mutex );
185 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
187 assert( mc != NULL );
189 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
191 if ( --mc->mc_refcnt == 0 ) {
192 meta_back_conn_free( mc );
195 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
199 * meta_back_init_one_conn
201 * Initializes one connection
204 meta_back_init_one_conn(
209 metasingleconn_t *msc,
212 ldap_back_send_t sendok )
214 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
221 if ( msc->msc_ld != NULL ) {
222 return rs->sr_err = LDAP_SUCCESS;
226 * Attempts to initialize the connection to the target ds
228 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
229 if ( rs->sr_err != LDAP_SUCCESS ) {
234 * Set LDAP version. This will always succeed: If the client
235 * bound with a particular version, then so can we.
237 vers = op->o_conn->c_protocol;
238 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &vers );
240 /* automatically chase referrals ("chase-referrals"/"dont-chase-referrals" statement) */
241 if ( LDAP_BACK_CHASE_REFERRALS( mi ) ) {
242 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
246 /* start TLS ("tls [try-]{start|propagate}" statement) */
247 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
248 && !ldap_is_ldaps_url( mt->mt_uri ) )
250 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
252 * use asynchronous StartTLS; in case, chase referral
253 * FIXME: OpenLDAP does not return referral on StartTLS yet
257 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
258 if ( rs->sr_err == LDAP_SUCCESS ) {
259 LDAPMessage *res = NULL;
260 int rc, nretries = mt->mt_nretries;
263 LDAP_BACK_TV_SET( &tv );
266 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
268 rs->sr_err = LDAP_OTHER;
270 } else if ( rc == 0 ) {
271 if ( nretries != 0 ) {
272 if ( nretries > 0 ) {
275 LDAP_BACK_TV_SET( &tv );
278 rs->sr_err = LDAP_OTHER;
280 } else if ( rc == LDAP_RES_EXTENDED ) {
281 struct berval *data = NULL;
283 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
285 if ( rs->sr_err == LDAP_SUCCESS ) {
286 rs->sr_err = ldap_result2error( msc->msc_ld, res, 1 );
289 /* FIXME: in case a referral
290 * is returned, should we try
291 * using it instead of the
293 if ( rs->sr_err == LDAP_SUCCESS ) {
294 ldap_install_tls( msc->msc_ld );
296 } else if ( rs->sr_err == LDAP_REFERRAL ) {
297 rs->sr_err = LDAP_OTHER;
298 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
302 if ( data->bv_val ) {
303 ber_memfree( data->bv_val );
310 rs->sr_err = LDAP_OTHER;
317 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
319 * use synchronous StartTLS
321 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
322 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
324 /* if StartTLS is requested, only attempt it if the URL
325 * is not "ldaps://"; this may occur not only in case
326 * of misconfiguration, but also when used in the chain
327 * overlay, where the "uri" can be parsed out of a referral */
328 if ( rs->sr_err == LDAP_SERVER_DOWN
329 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
331 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
335 #endif /* HAVE_TLS */
338 * Set the network timeout if set
340 if ( mi->mi_network_timeout != 0 ) {
341 struct timeval network_timeout;
343 network_timeout.tv_usec = 0;
344 network_timeout.tv_sec = mi->mi_network_timeout;
346 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
347 (void *)&network_timeout );
351 * If the connection DN is not null, an attempt to rewrite it is made
355 if ( !BER_BVISNULL( &mt->mt_pseudorootdn ) ) {
356 ber_dupbv( &msc->msc_bound_ndn, &mt->mt_pseudorootdn );
357 if ( !BER_BVISNULL( &mt->mt_pseudorootpw ) ) {
358 ber_dupbv( &msc->msc_cred, &mt->mt_pseudorootpw );
362 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
365 LDAP_BACK_CONN_ISPRIV_SET( msc );
368 BER_BVZERO( &msc->msc_cred );
369 BER_BVZERO( &msc->msc_bound_ndn );
370 if ( !BER_BVISEMPTY( &op->o_ndn )
371 && SLAP_IS_AUTHZ_BACKEND( op )
375 dc.conn = op->o_conn;
380 * Rewrite the bind dn if needed
382 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
383 &msc->msc_bound_ndn ) )
385 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
389 /* copy the DN idf needed */
390 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
391 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
395 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
399 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
401 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
404 if ( rs->sr_err == LDAP_SUCCESS ) {
406 * Sets a cookie for the rewrite session
408 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
411 rs->sr_err = slap_map_api2result( rs );
412 if ( sendok & LDAP_BACK_SENDERR ) {
413 send_ldap_result( op, rs );
424 * Retries one connection
432 ldap_back_send_t sendok )
434 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
435 metatarget_t *mt = &mi->mi_targets[ candidate ];
436 int rc = LDAP_UNAVAILABLE;
437 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
440 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
442 assert( mc->mc_refcnt > 0 );
444 if ( mc->mc_refcnt == 1 ) {
445 while ( ldap_pvt_thread_mutex_trylock( &mc->mc_mutex ) ) {
446 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
447 ldap_pvt_thread_yield();
451 Debug( LDAP_DEBUG_ANY,
452 "%s meta_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
453 op->o_log_prefix, mt->mt_uri,
454 BER_BVISNULL( &msc->msc_bound_ndn ) ?
455 "" : msc->msc_bound_ndn.bv_val );
457 meta_clear_one_candidate( msc );
458 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
460 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
462 /* mc here must be the regular mc, reset and ready for init */
463 rc = meta_back_init_one_conn( op, rs, mt, mc, msc,
464 LDAP_BACK_CONN_ISPRIV( mc ),
465 candidate == mc->mc_authz_target, sendok );
467 if ( rc == LDAP_SUCCESS ) {
468 rc = meta_back_single_dobind( op, rs, mc, candidate,
469 sendok, mt->mt_nretries, 0 );
472 ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
475 if ( rc != LDAP_SUCCESS ) {
479 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
481 return rc == LDAP_SUCCESS ? 1 : 0;
485 * callback for unique candidate selection
488 meta_back_conn_cb( Operation *op, SlapReply *rs )
490 assert( op->o_tag == LDAP_REQ_SEARCH );
492 switch ( rs->sr_type ) {
494 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
510 meta_back_get_candidate(
515 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
519 * tries to get a unique candidate
520 * (takes care of default target)
522 candidate = meta_back_select_unique_candidate( mi, ndn );
525 * if any is found, inits the connection
527 if ( candidate == META_TARGET_NONE ) {
528 rs->sr_err = LDAP_NO_SUCH_OBJECT;
529 rs->sr_text = "no suitable candidate target found";
531 } else if ( candidate == META_TARGET_MULTIPLE ) {
534 SlapReply rs2 = { 0 };
535 slap_callback cb2 = { 0 };
538 /* try to get a unique match for the request ndn
539 * among the multiple candidates available */
540 op2.o_tag = LDAP_REQ_SEARCH;
542 op2.o_req_ndn = *ndn;
543 op2.ors_scope = LDAP_SCOPE_BASE;
544 op2.ors_deref = LDAP_DEREF_NEVER;
545 op2.ors_attrs = slap_anlist_no_attrs;
546 op2.ors_attrsonly = 0;
547 op2.ors_limit = NULL;
549 op2.ors_tlimit = SLAP_NO_LIMIT;
551 f.f_choice = LDAP_FILTER_PRESENT;
552 f.f_desc = slap_schema.si_ad_objectClass;
554 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
556 op2.o_callback = &cb2;
557 cb2.sc_response = meta_back_conn_cb;
558 cb2.sc_private = (void *)&candidate;
560 rc = op->o_bd->be_search( &op2, &rs2 );
562 switch ( rs2.sr_err ) {
565 rs->sr_err = rs2.sr_err;
568 case LDAP_SIZELIMIT_EXCEEDED:
569 /* if multiple candidates can serve the operation,
570 * and a default target is defined, and it is
571 * a candidate, try using it (FIXME: YMMV) */
572 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
573 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ].mt_nsuffix,
574 mi->mi_targets[ mi->mi_defaulttarget ].mt_scope,
575 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
577 candidate = mi->mi_defaulttarget;
578 rs->sr_err = LDAP_SUCCESS;
582 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
583 rs->sr_text = "cannot select unique candidate target";
589 rs->sr_err = LDAP_SUCCESS;
595 static void *meta_back_candidates_dummy;
598 meta_back_candidates_keyfree(
602 metacandidates_t *mc = (metacandidates_t *)data;
604 ber_memfree_x( mc->mc_candidates, NULL );
605 ber_memfree_x( data, NULL );
609 meta_back_candidates_get( Operation *op )
611 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
612 metacandidates_t *mc;
614 if ( op->o_threadctx ) {
617 ldap_pvt_thread_pool_getkey( op->o_threadctx,
618 &meta_back_candidates_dummy, &data, NULL );
619 mc = (metacandidates_t *)data;
622 mc = mi->mi_candidates;
626 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
627 mc->mc_ntargets = mi->mi_ntargets;
628 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
629 if ( op->o_threadctx ) {
633 ldap_pvt_thread_pool_setkey( op->o_threadctx,
634 &meta_back_candidates_dummy, data,
635 meta_back_candidates_keyfree );
638 mi->mi_candidates = mc;
641 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
642 /* NOTE: in the future, may want to allow back-config
643 * to add/remove targets from back-meta... */
644 mc->mc_ntargets = mi->mi_ntargets;
645 mc->mc_candidates = ch_realloc( mc->mc_candidates,
646 sizeof( SlapReply ) * mc->mc_ntargets );
649 return mc->mc_candidates;
655 * Prepares the connection structure
659 * - determine what DN is being requested:
661 * op requires candidate checks
663 * add unique parent of o_req_ndn
664 * bind unique^*[/all] o_req_ndn [no check]
665 * compare unique^+ o_req_ndn
666 * delete unique o_req_ndn
667 * modify unique o_req_ndn
668 * search any o_req_ndn
669 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
671 * - for ops that require the candidate to be unique, in case of multiple
672 * occurrences an internal search with sizeLimit=1 is performed
673 * if a unique candidate can actually be determined. If none is found,
674 * the operation aborts; if multiple are found, the default target
675 * is used if defined and candidate; otherwise the operation aborts.
677 * *^note: actually, the bind operation is handled much like a search;
678 * i.e. the bind is broadcast to all candidate targets.
680 * +^note: actually, the compare operation is handled much like a search;
681 * i.e. the compare is broadcast to all candidate targets, while checking
682 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
690 ldap_back_send_t sendok )
692 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
693 metaconn_t *mc = NULL,
695 int cached = META_TARGET_NONE,
696 i = META_TARGET_NONE,
702 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
705 struct berval ndn = op->o_req_ndn,
708 SlapReply *candidates = meta_back_candidates_get( op );
710 /* Internal searches are privileged and shared. So is root. */
711 /* FIXME: there seem to be concurrency issues */
712 if ( op->o_do_not_cache || be_isroot( op ) ) {
713 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
714 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
715 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
718 mc_curr.mc_local_ndn = op->o_ndn;
720 /* Explicit binds must not be shared */
721 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
722 mc_curr.mc_conn = op->o_conn;
725 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
729 /* Searches for a metaconn in the avl tree */
730 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
731 mc = (metaconn_t *)avl_find( mi->mi_conntree,
732 (caddr_t)&mc_curr, meta_back_conn_cmp );
734 if ( mc->mc_tainted ) {
735 rs->sr_err = LDAP_UNAVAILABLE;
736 rs->sr_text = "remote server unavailable";
737 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
743 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
745 switch ( op->o_tag ) {
747 /* if we go to selection, the entry must not exist,
748 * and we must be able to resolve the parent */
750 dnParent( &ndn, &pndn );
753 case LDAP_REQ_MODRDN:
754 /* if nnewSuperior is not NULL, it must resolve
755 * to the same candidate as the req_ndn */
756 if ( op->orr_nnewSup ) {
762 /* if bound as rootdn, the backend must bind to all targets
763 * with the administrative identity */
764 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
765 op_type = META_OP_REQUIRE_ALL;
769 case LDAP_REQ_DELETE:
770 case LDAP_REQ_MODIFY:
771 /* just a unique candidate */
774 case LDAP_REQ_COMPARE:
775 case LDAP_REQ_SEARCH:
776 /* allow multiple candidates for the searchBase */
777 op_type = META_OP_ALLOW_MULTIPLE;
781 /* right now, just break (exop?) */
786 * require all connections ...
788 if ( op_type == META_OP_REQUIRE_ALL ) {
790 /* Looks like we didn't get a bind. Open a new session... */
792 mc = metaconn_alloc( op );
793 mc->mc_conn = mc_curr.mc_conn;
794 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
798 for ( i = 0; i < mi->mi_ntargets; i++ ) {
799 metatarget_t *mt = &mi->mi_targets[ i ];
800 metasingleconn_t *msc = &mc->mc_conns[ i ];
803 * The target is activated; if needed, it is
806 candidates[ i ].sr_err = meta_back_init_one_conn( op,
808 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
809 i == mc->mc_authz_target, sendok );
810 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
811 candidates[ i ].sr_tag = META_CANDIDATE;
817 * FIXME: in case one target cannot
818 * be init'd, should the other ones
821 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
822 err = candidates[ i ].sr_err;
827 if ( ncandidates == 0 ) {
829 meta_back_freeconn( op, mc );
832 meta_back_release_conn( op, mc );
835 rs->sr_err = LDAP_NO_SUCH_OBJECT;
836 rs->sr_text = "Unable to select valid candidates";
838 if ( sendok & LDAP_BACK_SENDERR ) {
839 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
840 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
842 send_ldap_result( op, rs );
844 rs->sr_matched = NULL;
854 * looks in cache, if any
856 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
857 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
860 if ( op_type == META_OP_REQUIRE_SINGLE ) {
861 metatarget_t *mt = NULL;
862 metasingleconn_t *msc = NULL;
866 for ( j = 0; j < mi->mi_ntargets; j++ ) {
867 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
871 * tries to get a unique candidate
872 * (takes care of default target)
874 if ( i == META_TARGET_NONE ) {
875 i = meta_back_get_candidate( op, rs, &ndn );
877 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && parent ) {
878 i = meta_back_get_candidate( op, rs, &pndn );
881 if ( rs->sr_err != LDAP_SUCCESS ) {
883 meta_back_release_conn( op, mc );
886 if ( sendok & LDAP_BACK_SENDERR ) {
887 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
888 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
890 send_ldap_result( op, rs );
892 rs->sr_matched = NULL;
899 if ( newparent && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
902 meta_back_release_conn( op, mc );
905 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
906 rs->sr_text = "cross-target rename not supported";
907 if ( sendok & LDAP_BACK_SENDERR ) {
908 send_ldap_result( op, rs );
915 Debug( LDAP_DEBUG_TRACE,
916 "==>meta_back_getconn: got target %d for ndn=\"%s\" from cache\n",
917 i, op->o_req_ndn.bv_val, 0 );
920 /* Retries searching for a metaconn in the avl tree
921 * the reason is that the connection might have been
922 * created by meta_back_get_candidate() */
923 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
924 mc = (metaconn_t *)avl_find( mi->mi_conntree,
925 (caddr_t)&mc_curr, meta_back_conn_cmp );
929 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
931 /* Looks like we didn't get a bind. Open a new session... */
933 mc = metaconn_alloc( op );
934 mc->mc_conn = mc_curr.mc_conn;
935 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
941 * Clear all other candidates
943 ( void )meta_clear_unused_candidates( op, i );
945 mt = &mi->mi_targets[ i ];
946 msc = &mc->mc_conns[ i ];
949 * The target is activated; if needed, it is
950 * also init'd. In case of error, meta_back_init_one_conn
951 * sends the appropriate result.
953 err = meta_back_init_one_conn( op, rs, mt, mc, msc,
954 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
955 i == mc->mc_authz_target, sendok );
956 if ( err != LDAP_SUCCESS ) {
958 * FIXME: in case one target cannot
959 * be init'd, should the other ones
962 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
964 (void)meta_clear_one_candidate( msc );
965 meta_back_freeconn( op, mc );
968 meta_back_release_conn( op, mc );
973 candidates[ i ].sr_err = LDAP_SUCCESS;
974 candidates[ i ].sr_tag = META_CANDIDATE;
982 * if no unique candidate ...
986 /* Looks like we didn't get a bind. Open a new session... */
988 mc = metaconn_alloc( op );
989 mc->mc_conn = mc_curr.mc_conn;
990 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
994 for ( i = 0; i < mi->mi_ntargets; i++ ) {
995 metatarget_t *mt = &mi->mi_targets[ i ];
996 metasingleconn_t *msc = &mc->mc_conns[ i ];
999 || meta_back_is_candidate( &mt->mt_nsuffix,
1002 LDAP_SCOPE_SUBTREE ) )
1006 * The target is activated; if needed, it is
1009 int lerr = meta_back_init_one_conn( op, rs,
1011 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1012 i == mc->mc_authz_target,
1014 if ( lerr == LDAP_SUCCESS ) {
1015 candidates[ i ].sr_tag = META_CANDIDATE;
1016 candidates[ i ].sr_err = LDAP_SUCCESS;
1019 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_init_one_conn(%d)\n",
1020 op->o_log_prefix, i, 0 );
1025 * FIXME: in case one target cannot
1026 * be init'd, should the other ones
1030 ( void )meta_clear_one_candidate( msc );
1032 /* leave the target candidate, but record the error for later use */
1033 candidates[ i ].sr_err = lerr;
1036 Debug( LDAP_DEBUG_ANY, "%s: meta_back_init_one_conn(%d) failed: %d\n",
1037 op->o_log_prefix, i, lerr );
1044 ( void )meta_clear_one_candidate( msc );
1046 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1050 if ( ncandidates == 0 ) {
1052 meta_back_freeconn( op, mc );
1055 meta_back_release_conn( op, mc );
1058 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1059 rs->sr_text = "Unable to select valid candidates";
1061 if ( sendok & LDAP_BACK_SENDERR ) {
1062 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1063 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1065 send_ldap_result( op, rs );
1067 rs->sr_matched = NULL;
1075 /* clear out meta_back_init_one_conn non-fatal errors */
1076 rs->sr_err = LDAP_SUCCESS;
1082 * Inserts the newly created metaconn in the avl tree
1084 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
1085 err = avl_insert( &mi->mi_conntree, ( caddr_t )mc,
1086 meta_back_conn_cmp, meta_back_conn_dup );
1088 #if PRINT_CONNTREE > 0
1089 myprint( mi->mi_conntree );
1090 #endif /* PRINT_CONNTREE */
1092 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
1095 * Err could be -1 in case a duplicate metaconn is inserted
1097 * FIXME: what if the same client issues more than one
1098 * asynchronous operations?
1101 Debug( LDAP_DEBUG_ANY,
1102 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1103 op->o_log_prefix, ncandidates,
1104 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1106 rs->sr_err = LDAP_OTHER;
1107 rs->sr_text = "Internal server error";
1108 meta_back_freeconn( op, mc );
1109 if ( sendok & LDAP_BACK_SENDERR ) {
1110 send_ldap_result( op, rs );
1116 Debug( LDAP_DEBUG_TRACE,
1117 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1118 op->o_log_prefix, ncandidates,
1119 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1122 Debug( LDAP_DEBUG_TRACE,
1123 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1124 op->o_log_prefix, ncandidates,
1125 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1132 meta_back_release_conn(
1136 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1138 assert( mc != NULL );
1140 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
1141 assert( mc->mc_refcnt > 0 );
1143 if ( mc->mc_refcnt == 0 && mc->mc_tainted ) {
1144 (void)avl_delete( &mi->mi_conntree, ( caddr_t )mc,
1145 meta_back_conn_cmp );
1146 meta_back_conn_free( mc );
1148 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );