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, "%s meta_back_retry: retrying uri=\"%s\" DN=\"%s\"\n",
452 op->o_log_prefix, mt->mt_uri,
453 BER_BVISNULL( &msc->msc_bound_ndn ) ? "" : msc->msc_bound_ndn.bv_val );
455 meta_clear_one_candidate( msc );
456 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
458 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
460 /* mc here must be the regular mc, reset and ready for init */
461 rc = meta_back_init_one_conn( op, rs, mt, mc, msc,
462 LDAP_BACK_CONN_ISPRIV( mc ),
463 candidate == mc->mc_authz_target, sendok );
465 if ( rc == LDAP_SUCCESS ) {
466 rc = meta_back_single_dobind( op, rs, mc, candidate,
467 sendok, mt->mt_nretries, 0 );
470 ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
473 if ( rc != LDAP_SUCCESS ) {
477 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
479 return rc == LDAP_SUCCESS ? 1 : 0;
483 * callback for unique candidate selection
486 meta_back_conn_cb( Operation *op, SlapReply *rs )
488 assert( op->o_tag == LDAP_REQ_SEARCH );
490 switch ( rs->sr_type ) {
492 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
508 meta_back_get_candidate(
513 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
517 * tries to get a unique candidate
518 * (takes care of default target)
520 candidate = meta_back_select_unique_candidate( mi, ndn );
523 * if any is found, inits the connection
525 if ( candidate == META_TARGET_NONE ) {
526 rs->sr_err = LDAP_NO_SUCH_OBJECT;
527 rs->sr_text = "no suitable candidate target found";
529 } else if ( candidate == META_TARGET_MULTIPLE ) {
532 SlapReply rs2 = { 0 };
533 slap_callback cb2 = { 0 };
536 /* try to get a unique match for the request ndn
537 * among the multiple candidates available */
538 op2.o_tag = LDAP_REQ_SEARCH;
540 op2.o_req_ndn = *ndn;
541 op2.ors_scope = LDAP_SCOPE_BASE;
542 op2.ors_deref = LDAP_DEREF_NEVER;
543 op2.ors_attrs = slap_anlist_no_attrs;
544 op2.ors_attrsonly = 0;
545 op2.ors_limit = NULL;
547 op2.ors_tlimit = SLAP_NO_LIMIT;
549 f.f_choice = LDAP_FILTER_PRESENT;
550 f.f_desc = slap_schema.si_ad_objectClass;
552 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
554 op2.o_callback = &cb2;
555 cb2.sc_response = meta_back_conn_cb;
556 cb2.sc_private = (void *)&candidate;
558 rc = op->o_bd->be_search( &op2, &rs2 );
560 switch ( rs2.sr_err ) {
563 rs->sr_err = rs2.sr_err;
566 case LDAP_SIZELIMIT_EXCEEDED:
567 /* if multiple candidates can serve the operation,
568 * and a default target is defined, and it is
569 * a candidate, try using it (FIXME: YMMV) */
570 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
571 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ].mt_nsuffix,
572 mi->mi_targets[ mi->mi_defaulttarget ].mt_scope,
573 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
575 candidate = mi->mi_defaulttarget;
576 rs->sr_err = LDAP_SUCCESS;
580 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
581 rs->sr_text = "cannot select unique candidate target";
587 rs->sr_err = LDAP_SUCCESS;
593 static void *meta_back_candidates_dummy;
596 meta_back_candidates_keyfree(
600 metacandidates_t *mc = (metacandidates_t *)data;
602 ber_memfree_x( mc->mc_candidates, NULL );
603 ber_memfree_x( data, NULL );
607 meta_back_candidates_get( Operation *op )
609 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
610 metacandidates_t *mc;
612 if ( op->o_threadctx ) {
615 ldap_pvt_thread_pool_getkey( op->o_threadctx,
616 &meta_back_candidates_dummy, &data, NULL );
617 mc = (metacandidates_t *)data;
620 mc = mi->mi_candidates;
624 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
625 mc->mc_ntargets = mi->mi_ntargets;
626 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
627 if ( op->o_threadctx ) {
631 ldap_pvt_thread_pool_setkey( op->o_threadctx,
632 &meta_back_candidates_dummy, data,
633 meta_back_candidates_keyfree );
636 mi->mi_candidates = mc;
639 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
640 /* NOTE: in the future, may want to allow back-config
641 * to add/remove targets from back-meta... */
642 mc->mc_ntargets = mi->mi_ntargets;
643 mc->mc_candidates = ch_realloc( mc->mc_candidates,
644 sizeof( SlapReply ) * mc->mc_ntargets );
647 return mc->mc_candidates;
653 * Prepares the connection structure
657 * - determine what DN is being requested:
659 * op requires candidate checks
661 * add unique parent of o_req_ndn
662 * bind unique^*[/all] o_req_ndn [no check]
663 * compare unique^+ o_req_ndn
664 * delete unique o_req_ndn
665 * modify unique o_req_ndn
666 * search any o_req_ndn
667 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
669 * - for ops that require the candidate to be unique, in case of multiple
670 * occurrences an internal search with sizeLimit=1 is performed
671 * if a unique candidate can actually be determined. If none is found,
672 * the operation aborts; if multiple are found, the default target
673 * is used if defined and candidate; otherwise the operation aborts.
675 * *^note: actually, the bind operation is handled much like a search;
676 * i.e. the bind is broadcast to all candidate targets.
678 * +^note: actually, the compare operation is handled much like a search;
679 * i.e. the compare is broadcast to all candidate targets, while checking
680 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
688 ldap_back_send_t sendok )
690 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
691 metaconn_t *mc = NULL,
693 int cached = META_TARGET_NONE,
694 i = META_TARGET_NONE,
700 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
703 struct berval ndn = op->o_req_ndn,
706 SlapReply *candidates = meta_back_candidates_get( op );
708 /* Internal searches are privileged and shared. So is root. */
709 /* FIXME: there seem to be concurrency issues */
710 if ( op->o_do_not_cache || be_isroot( op ) ) {
711 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
712 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
713 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
716 mc_curr.mc_local_ndn = op->o_ndn;
718 /* Explicit binds must not be shared */
719 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
720 mc_curr.mc_conn = op->o_conn;
723 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
727 /* Searches for a metaconn in the avl tree */
728 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
729 mc = (metaconn_t *)avl_find( mi->mi_conntree,
730 (caddr_t)&mc_curr, meta_back_conn_cmp );
732 if ( mc->mc_tainted ) {
733 rs->sr_err = LDAP_UNAVAILABLE;
734 rs->sr_text = "remote server unavailable";
735 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
741 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
743 switch ( op->o_tag ) {
745 /* if we go to selection, the entry must not exist,
746 * and we must be able to resolve the parent */
748 dnParent( &ndn, &pndn );
751 case LDAP_REQ_MODRDN:
752 /* if nnewSuperior is not NULL, it must resolve
753 * to the same candidate as the req_ndn */
754 if ( op->orr_nnewSup ) {
760 /* if bound as rootdn, the backend must bind to all targets
761 * with the administrative identity */
762 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
763 op_type = META_OP_REQUIRE_ALL;
767 case LDAP_REQ_DELETE:
768 case LDAP_REQ_MODIFY:
769 /* just a unique candidate */
772 case LDAP_REQ_COMPARE:
773 case LDAP_REQ_SEARCH:
774 /* allow multiple candidates for the searchBase */
775 op_type = META_OP_ALLOW_MULTIPLE;
779 /* right now, just break (exop?) */
784 * require all connections ...
786 if ( op_type == META_OP_REQUIRE_ALL ) {
788 /* Looks like we didn't get a bind. Open a new session... */
790 mc = metaconn_alloc( op );
791 mc->mc_conn = mc_curr.mc_conn;
792 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
796 for ( i = 0; i < mi->mi_ntargets; i++ ) {
797 metatarget_t *mt = &mi->mi_targets[ i ];
798 metasingleconn_t *msc = &mc->mc_conns[ i ];
801 * The target is activated; if needed, it is
804 candidates[ i ].sr_err = meta_back_init_one_conn( op,
806 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
807 i == mc->mc_authz_target, sendok );
808 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
809 candidates[ i ].sr_tag = META_CANDIDATE;
815 * FIXME: in case one target cannot
816 * be init'd, should the other ones
819 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
820 err = candidates[ i ].sr_err;
825 if ( ncandidates == 0 ) {
827 meta_back_freeconn( op, mc );
830 meta_back_release_conn( op, mc );
833 rs->sr_err = LDAP_NO_SUCH_OBJECT;
834 rs->sr_text = "Unable to select valid candidates";
836 if ( sendok & LDAP_BACK_SENDERR ) {
837 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
838 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
840 send_ldap_result( op, rs );
842 rs->sr_matched = NULL;
852 * looks in cache, if any
854 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
855 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
858 if ( op_type == META_OP_REQUIRE_SINGLE ) {
859 metatarget_t *mt = NULL;
860 metasingleconn_t *msc = NULL;
864 for ( j = 0; j < mi->mi_ntargets; j++ ) {
865 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
869 * tries to get a unique candidate
870 * (takes care of default target)
872 if ( i == META_TARGET_NONE ) {
873 i = meta_back_get_candidate( op, rs, &ndn );
875 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && parent ) {
876 i = meta_back_get_candidate( op, rs, &pndn );
879 if ( rs->sr_err != LDAP_SUCCESS ) {
881 meta_back_release_conn( op, mc );
884 if ( sendok & LDAP_BACK_SENDERR ) {
885 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
886 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
888 send_ldap_result( op, rs );
890 rs->sr_matched = NULL;
897 if ( newparent && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
900 meta_back_release_conn( op, mc );
903 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
904 rs->sr_text = "cross-target rename not supported";
905 if ( sendok & LDAP_BACK_SENDERR ) {
906 send_ldap_result( op, rs );
913 Debug( LDAP_DEBUG_TRACE,
914 "==>meta_back_getconn: got target %d for ndn=\"%s\" from cache\n",
915 i, op->o_req_ndn.bv_val, 0 );
918 /* Retries searching for a metaconn in the avl tree
919 * the reason is that the connection might have been
920 * created by meta_back_get_candidate() */
921 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
922 mc = (metaconn_t *)avl_find( mi->mi_conntree,
923 (caddr_t)&mc_curr, meta_back_conn_cmp );
927 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
929 /* Looks like we didn't get a bind. Open a new session... */
931 mc = metaconn_alloc( op );
932 mc->mc_conn = mc_curr.mc_conn;
933 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
939 * Clear all other candidates
941 ( void )meta_clear_unused_candidates( op, i );
943 mt = &mi->mi_targets[ i ];
944 msc = &mc->mc_conns[ i ];
947 * The target is activated; if needed, it is
948 * also init'd. In case of error, meta_back_init_one_conn
949 * sends the appropriate result.
951 err = meta_back_init_one_conn( op, rs, mt, mc, msc,
952 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
953 i == mc->mc_authz_target, sendok );
954 if ( err != LDAP_SUCCESS ) {
956 * FIXME: in case one target cannot
957 * be init'd, should the other ones
960 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
962 (void)meta_clear_one_candidate( msc );
963 meta_back_freeconn( op, mc );
966 meta_back_release_conn( op, mc );
971 candidates[ i ].sr_err = LDAP_SUCCESS;
972 candidates[ i ].sr_tag = META_CANDIDATE;
980 * if no unique candidate ...
984 /* Looks like we didn't get a bind. Open a new session... */
986 mc = metaconn_alloc( op );
987 mc->mc_conn = mc_curr.mc_conn;
988 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
992 for ( i = 0; i < mi->mi_ntargets; i++ ) {
993 metatarget_t *mt = &mi->mi_targets[ i ];
994 metasingleconn_t *msc = &mc->mc_conns[ i ];
997 || meta_back_is_candidate( &mt->mt_nsuffix,
1000 LDAP_SCOPE_SUBTREE ) )
1004 * The target is activated; if needed, it is
1007 int lerr = meta_back_init_one_conn( op, rs,
1009 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1010 i == mc->mc_authz_target,
1012 if ( lerr == LDAP_SUCCESS ) {
1013 candidates[ i ].sr_tag = META_CANDIDATE;
1014 candidates[ i ].sr_err = LDAP_SUCCESS;
1017 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_init_one_conn(%d)\n",
1018 op->o_log_prefix, i, 0 );
1023 * FIXME: in case one target cannot
1024 * be init'd, should the other ones
1028 ( void )meta_clear_one_candidate( msc );
1030 /* leave the target candidate, but record the error for later use */
1031 candidates[ i ].sr_err = lerr;
1034 Debug( LDAP_DEBUG_ANY, "%s: meta_back_init_one_conn(%d) failed: %d\n",
1035 op->o_log_prefix, i, lerr );
1042 ( void )meta_clear_one_candidate( msc );
1044 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1048 if ( ncandidates == 0 ) {
1050 meta_back_freeconn( op, mc );
1053 meta_back_release_conn( op, mc );
1056 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1057 rs->sr_text = "Unable to select valid candidates";
1059 if ( sendok & LDAP_BACK_SENDERR ) {
1060 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1061 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1063 send_ldap_result( op, rs );
1065 rs->sr_matched = NULL;
1073 /* clear out meta_back_init_one_conn non-fatal errors */
1074 rs->sr_err = LDAP_SUCCESS;
1080 * Inserts the newly created metaconn in the avl tree
1082 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
1083 err = avl_insert( &mi->mi_conntree, ( caddr_t )mc,
1084 meta_back_conn_cmp, meta_back_conn_dup );
1086 #if PRINT_CONNTREE > 0
1087 myprint( mi->mi_conntree );
1088 #endif /* PRINT_CONNTREE */
1090 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
1093 * Err could be -1 in case a duplicate metaconn is inserted
1095 * FIXME: what if the same client issues more than one
1096 * asynchronous operations?
1099 Debug( LDAP_DEBUG_ANY,
1100 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1101 op->o_log_prefix, ncandidates,
1102 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1104 rs->sr_err = LDAP_OTHER;
1105 rs->sr_text = "Internal server error";
1106 meta_back_freeconn( op, mc );
1107 if ( sendok & LDAP_BACK_SENDERR ) {
1108 send_ldap_result( op, rs );
1114 Debug( LDAP_DEBUG_TRACE,
1115 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1116 op->o_log_prefix, ncandidates,
1117 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1120 Debug( LDAP_DEBUG_TRACE,
1121 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1122 op->o_log_prefix, ncandidates,
1123 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1130 meta_back_release_conn(
1134 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1136 assert( mc != NULL );
1138 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
1139 assert( mc->mc_refcnt > 0 );
1141 if ( mc->mc_refcnt == 0 && mc->mc_tainted ) {
1142 meta_back_conn_free( mc );
1144 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );