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 #define PRINT_CONNTREE 0
43 * meta_back_conndn_cmp
45 * compares two struct metaconn based on the value of the conn pointer
46 * and of the local DN; used by avl stuff
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 /* For shared sessions, conn is NULL. Only explicitly
59 * bound sessions will have non-NULL conn.
61 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
63 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
70 * meta_back_conndnmc_cmp
72 * compares two struct metaconn based on the value of the conn pointer,
73 * the local DN and the struct pointer; used by avl stuff
76 meta_back_conndnmc_cmp(
80 metaconn_t *mc1 = ( metaconn_t * )c1;
81 metaconn_t *mc2 = ( metaconn_t * )c2;
84 /* If local DNs don't match, it is definitely not a match */
85 /* For shared sessions, conn is NULL. Only explicitly
86 * bound sessions will have non-NULL conn.
88 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
90 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
92 rc = SLAP_PTRCMP( mc1, mc2 );
102 * compares two struct metaconn based on the value of the conn pointer;
110 metaconn_t *mc1 = ( metaconn_t * )c1;
111 metaconn_t *mc2 = ( metaconn_t * )c2;
113 /* For shared sessions, conn is NULL. Only explicitly
114 * bound sessions will have non-NULL conn.
116 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
120 * meta_back_conndn_dup
122 * returns -1 in case a duplicate struct metaconn has been inserted;
126 meta_back_conndn_dup(
130 metaconn_t *mc1 = ( metaconn_t * )c1;
131 metaconn_t *mc2 = ( metaconn_t * )c2;
133 /* Cannot have more than one shared session with same DN */
134 if ( mc1->mc_conn == mc2->mc_conn &&
135 dn_match( &mc1->mc_local_ndn, &mc2->mc_local_ndn ) )
144 * Debug stuff (got it from libavl)
146 #if PRINT_CONNTREE > 0
148 ravl_print( Avlnode *root, int depth )
151 metaconn_t *mc = (metaconn_t *)root->avl_data;
157 ravl_print( root->avl_right, depth + 1 );
159 for ( i = 0; i < depth; i++ ) {
163 printf( "c(%d%s%s) %d\n",
164 LDAP_BACK_PCONN_ID( mc->mc_conn ),
165 BER_BVISNULL( &mc->mc_local_ndn ) ? "" : ": ",
166 BER_BVISNULL( &mc->mc_local_ndn ) ? "" : mc->mc_local_ndn.bv_val,
169 ravl_print( root->avl_left, depth + 1 );
173 myprint( Avlnode *root )
175 printf( "********\n" );
178 printf( "\tNULL\n" );
180 ravl_print( root, 0 );
183 printf( "********\n" );
185 #endif /* PRINT_CONNTREE */
193 * Allocates a connection structure, making room for all the referenced targets
199 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
201 int i, ntargets = mi->mi_ntargets;
203 assert( ntargets > 0 );
205 /* malloc all in one */
206 mc = ( metaconn_t * )ch_malloc( sizeof( metaconn_t )
207 + sizeof( metasingleconn_t ) * ntargets );
212 for ( i = 0; i < ntargets; i++ ) {
213 mc->mc_conns[ i ].msc_ld = NULL;
214 BER_BVZERO( &mc->mc_conns[ i ].msc_bound_ndn );
215 BER_BVZERO( &mc->mc_conns[ i ].msc_cred );
216 mc->mc_conns[ i ].msc_mscflags = 0;
217 mc->mc_conns[ i ].msc_info = mi;
220 BER_BVZERO( &mc->mc_local_ndn );
221 mc->msc_mscflags = 0;
222 mc->mc_authz_target = META_BOUND_NONE;
233 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
235 assert( mc != NULL );
237 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
239 if ( --mc->mc_refcnt == 0 ) {
240 meta_back_conn_free( mc );
243 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
247 * meta_back_init_one_conn
249 * Initializes one connection
252 meta_back_init_one_conn(
259 ldap_back_send_t sendok )
261 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
262 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
265 int isauthz = ( candidate == mc->mc_authz_target );
270 if ( msc->msc_ld != NULL ) {
271 return rs->sr_err = LDAP_SUCCESS;
274 msc->msc_mscflags = 0;
277 * Attempts to initialize the connection to the target ds
279 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
280 if ( rs->sr_err != LDAP_SUCCESS ) {
285 * Set LDAP version. This will always succeed: If the client
286 * bound with a particular version, then so can we.
288 vers = op->o_conn->c_protocol;
289 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &vers );
291 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
292 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
293 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
296 /* start TLS ("tls [try-]{start|propagate}" statement) */
297 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
298 && !ldap_is_ldaps_url( mt->mt_uri ) )
300 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
302 * use asynchronous StartTLS; in case, chase referral
303 * FIXME: OpenLDAP does not return referral on StartTLS yet
307 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
308 if ( rs->sr_err == LDAP_SUCCESS ) {
309 LDAPMessage *res = NULL;
310 int rc, nretries = mt->mt_nretries;
313 LDAP_BACK_TV_SET( &tv );
316 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
318 rs->sr_err = LDAP_OTHER;
320 } else if ( rc == 0 ) {
321 if ( nretries != 0 ) {
322 if ( nretries > 0 ) {
325 LDAP_BACK_TV_SET( &tv );
328 rs->sr_err = LDAP_OTHER;
330 } else if ( rc == LDAP_RES_EXTENDED ) {
331 struct berval *data = NULL;
333 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
335 if ( rs->sr_err == LDAP_SUCCESS ) {
338 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
339 &err, NULL, NULL, NULL, NULL, 1 );
342 if ( rs->sr_err == LDAP_SUCCESS ) {
346 /* FIXME: in case a referral
347 * is returned, should we try
348 * using it instead of the
350 if ( rs->sr_err == LDAP_SUCCESS ) {
351 ldap_install_tls( msc->msc_ld );
353 } else if ( rs->sr_err == LDAP_REFERRAL ) {
354 rs->sr_err = LDAP_OTHER;
355 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
359 if ( data->bv_val ) {
360 ber_memfree( data->bv_val );
367 rs->sr_err = LDAP_OTHER;
374 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
376 * use synchronous StartTLS
378 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
379 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
381 /* if StartTLS is requested, only attempt it if the URL
382 * is not "ldaps://"; this may occur not only in case
383 * of misconfiguration, but also when used in the chain
384 * overlay, where the "uri" can be parsed out of a referral */
385 if ( rs->sr_err == LDAP_SERVER_DOWN
386 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
388 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
392 #endif /* HAVE_TLS */
395 * Set the network timeout if set
397 if ( mt->mt_network_timeout != 0 ) {
398 struct timeval network_timeout;
400 network_timeout.tv_usec = 0;
401 network_timeout.tv_sec = mt->mt_network_timeout;
403 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
404 (void *)&network_timeout );
408 * If the connection DN is not null, an attempt to rewrite it is made
412 if ( !BER_BVISNULL( &mt->mt_pseudorootdn ) ) {
413 ber_dupbv( &msc->msc_bound_ndn, &mt->mt_pseudorootdn );
414 if ( !BER_BVISNULL( &mt->mt_pseudorootpw ) ) {
415 ber_dupbv( &msc->msc_cred, &mt->mt_pseudorootpw );
419 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
422 LDAP_BACK_CONN_ISPRIV_SET( msc );
425 BER_BVZERO( &msc->msc_cred );
426 BER_BVZERO( &msc->msc_bound_ndn );
427 if ( !BER_BVISEMPTY( &op->o_ndn )
428 && SLAP_IS_AUTHZ_BACKEND( op )
432 dc.conn = op->o_conn;
437 * Rewrite the bind dn if needed
439 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
440 &msc->msc_bound_ndn ) )
442 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
446 /* copy the DN idf needed */
447 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
448 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
452 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
456 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
459 if ( rs->sr_err == LDAP_SUCCESS ) {
461 * Sets a cookie for the rewrite session
463 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
466 rs->sr_err = slap_map_api2result( rs );
467 if ( sendok & LDAP_BACK_SENDERR ) {
468 send_ldap_result( op, rs );
479 * Retries one connection
487 ldap_back_send_t sendok )
489 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
490 metatarget_t *mt = &mi->mi_targets[ candidate ];
491 metaconn_t *mc = *mcp;
492 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
493 int rc = LDAP_UNAVAILABLE,
494 binding = LDAP_BACK_CONN_BINDING( msc );
496 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
498 assert( mc->mc_refcnt > 0 );
499 if ( mc->mc_refcnt == 1 ) {
500 char buf[ SLAP_TEXT_BUFLEN ];
502 snprintf( buf, sizeof( buf ),
503 "retrying URI=\"%s\" DN=\"%s\"",
505 BER_BVISNULL( &msc->msc_bound_ndn ) ?
506 "" : msc->msc_bound_ndn.bv_val );
507 Debug( LDAP_DEBUG_ANY,
508 "%s meta_back_retry[%d]: %s.\n",
509 op->o_log_prefix, candidate, buf );
511 meta_clear_one_candidate( msc );
512 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
514 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
516 /* mc here must be the regular mc, reset and ready for init */
517 rc = meta_back_init_one_conn( op, rs, mt, mc, candidate,
518 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
520 LDAP_BACK_CONN_BINDING_SET( msc );
523 if ( rc == LDAP_SUCCESS ) {
524 rc = meta_back_single_dobind( op, rs, mcp, candidate,
525 sendok, mt->mt_nretries, 0 );
529 if ( rc != LDAP_SUCCESS ) {
530 if ( *mcp != NULL ) {
532 LDAP_BACK_CONN_BINDING_CLEAR( msc );
534 LDAP_BACK_CONN_TAINTED_SET( mc );
535 meta_back_release_conn_lock( op, mc, 0 );
540 rs->sr_err = LDAP_UNAVAILABLE;
542 send_ldap_result( op, rs );
546 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
548 return rc == LDAP_SUCCESS ? 1 : 0;
552 * callback for unique candidate selection
555 meta_back_conn_cb( Operation *op, SlapReply *rs )
557 assert( op->o_tag == LDAP_REQ_SEARCH );
559 switch ( rs->sr_type ) {
561 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
577 meta_back_get_candidate(
582 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
586 * tries to get a unique candidate
587 * (takes care of default target)
589 candidate = meta_back_select_unique_candidate( mi, ndn );
592 * if any is found, inits the connection
594 if ( candidate == META_TARGET_NONE ) {
595 rs->sr_err = LDAP_NO_SUCH_OBJECT;
596 rs->sr_text = "no suitable candidate target found";
598 } else if ( candidate == META_TARGET_MULTIPLE ) {
601 SlapReply rs2 = { 0 };
602 slap_callback cb2 = { 0 };
605 /* try to get a unique match for the request ndn
606 * among the multiple candidates available */
607 op2.o_tag = LDAP_REQ_SEARCH;
609 op2.o_req_ndn = *ndn;
610 op2.ors_scope = LDAP_SCOPE_BASE;
611 op2.ors_deref = LDAP_DEREF_NEVER;
612 op2.ors_attrs = slap_anlist_no_attrs;
613 op2.ors_attrsonly = 0;
614 op2.ors_limit = NULL;
616 op2.ors_tlimit = SLAP_NO_LIMIT;
618 f.f_choice = LDAP_FILTER_PRESENT;
619 f.f_desc = slap_schema.si_ad_objectClass;
621 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
623 op2.o_callback = &cb2;
624 cb2.sc_response = meta_back_conn_cb;
625 cb2.sc_private = (void *)&candidate;
627 rc = op->o_bd->be_search( &op2, &rs2 );
629 switch ( rs2.sr_err ) {
632 rs->sr_err = rs2.sr_err;
635 case LDAP_SIZELIMIT_EXCEEDED:
636 /* if multiple candidates can serve the operation,
637 * and a default target is defined, and it is
638 * a candidate, try using it (FIXME: YMMV) */
639 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
640 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ].mt_nsuffix,
641 mi->mi_targets[ mi->mi_defaulttarget ].mt_scope,
642 mi->mi_targets[ mi->mi_defaulttarget ].mt_subtree_exclude,
643 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
645 candidate = mi->mi_defaulttarget;
646 rs->sr_err = LDAP_SUCCESS;
650 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
651 rs->sr_text = "cannot select unique candidate target";
657 rs->sr_err = LDAP_SUCCESS;
663 static void *meta_back_candidates_dummy;
666 meta_back_candidates_keyfree(
670 metacandidates_t *mc = (metacandidates_t *)data;
672 ber_memfree_x( mc->mc_candidates, NULL );
673 ber_memfree_x( data, NULL );
677 meta_back_candidates_get( Operation *op )
679 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
680 metacandidates_t *mc;
682 if ( op->o_threadctx ) {
685 ldap_pvt_thread_pool_getkey( op->o_threadctx,
686 &meta_back_candidates_dummy, &data, NULL );
687 mc = (metacandidates_t *)data;
690 mc = mi->mi_candidates;
694 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
695 mc->mc_ntargets = mi->mi_ntargets;
696 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
697 if ( op->o_threadctx ) {
701 ldap_pvt_thread_pool_setkey( op->o_threadctx,
702 &meta_back_candidates_dummy, data,
703 meta_back_candidates_keyfree );
706 mi->mi_candidates = mc;
709 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
710 /* NOTE: in the future, may want to allow back-config
711 * to add/remove targets from back-meta... */
712 mc->mc_ntargets = mi->mi_ntargets;
713 mc->mc_candidates = ch_realloc( mc->mc_candidates,
714 sizeof( SlapReply ) * mc->mc_ntargets );
717 return mc->mc_candidates;
723 * Prepares the connection structure
727 * - determine what DN is being requested:
729 * op requires candidate checks
731 * add unique parent of o_req_ndn
732 * bind unique^*[/all] o_req_ndn [no check]
733 * compare unique^+ o_req_ndn
734 * delete unique o_req_ndn
735 * modify unique o_req_ndn
736 * search any o_req_ndn
737 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
739 * - for ops that require the candidate to be unique, in case of multiple
740 * occurrences an internal search with sizeLimit=1 is performed
741 * if a unique candidate can actually be determined. If none is found,
742 * the operation aborts; if multiple are found, the default target
743 * is used if defined and candidate; otherwise the operation aborts.
745 * *^note: actually, the bind operation is handled much like a search;
746 * i.e. the bind is broadcast to all candidate targets.
748 * +^note: actually, the compare operation is handled much like a search;
749 * i.e. the compare is broadcast to all candidate targets, while checking
750 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
758 ldap_back_send_t sendok )
760 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
761 metaconn_t *mc = NULL,
763 int cached = META_TARGET_NONE,
764 i = META_TARGET_NONE,
770 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
774 META_DNTYPE_NEWPARENT
775 } dn_type = META_DNTYPE_ENTRY;
776 struct berval ndn = op->o_req_ndn,
779 SlapReply *candidates = meta_back_candidates_get( op );
781 /* Internal searches are privileged and shared. So is root. */
782 /* FIXME: there seem to be concurrency issues */
783 if ( op->o_do_not_cache || be_isroot( op ) ) {
784 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
785 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
786 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
789 mc_curr.mc_local_ndn = op->o_ndn;
791 /* Explicit binds must not be shared */
792 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
793 mc_curr.mc_conn = op->o_conn;
796 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
800 /* Explicit Bind requests always get their own conn */
801 if ( !( sendok & LDAP_BACK_BINDING ) ) {
802 /* Searches for a metaconn in the avl tree */
804 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
805 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
806 (caddr_t)&mc_curr, meta_back_conndn_cmp );
808 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
809 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
811 /* don't let anyone else use this expired connection */
812 (void)avl_delete( &mi->mi_conninfo.lai_tree,
813 (caddr_t)mc, meta_back_conndnmc_cmp );
814 LDAP_BACK_CONN_TAINTED_SET( mc );
816 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
817 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
820 /* Don't reuse connections while they're still binding */
821 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
822 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
823 ldap_pvt_thread_yield();
829 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
832 switch ( op->o_tag ) {
834 /* if we go to selection, the entry must not exist,
835 * and we must be able to resolve the parent */
836 dn_type = META_DNTYPE_PARENT;
837 dnParent( &ndn, &pndn );
840 case LDAP_REQ_MODRDN:
841 /* if nnewSuperior is not NULL, it must resolve
842 * to the same candidate as the req_ndn */
843 if ( op->orr_nnewSup ) {
844 dn_type = META_DNTYPE_NEWPARENT;
849 /* if bound as rootdn, the backend must bind to all targets
850 * with the administrative identity */
851 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
852 op_type = META_OP_REQUIRE_ALL;
856 case LDAP_REQ_DELETE:
857 case LDAP_REQ_MODIFY:
858 /* just a unique candidate */
861 case LDAP_REQ_COMPARE:
862 case LDAP_REQ_SEARCH:
863 /* allow multiple candidates for the searchBase */
864 op_type = META_OP_ALLOW_MULTIPLE;
868 /* right now, just break (exop?) */
873 * require all connections ...
875 if ( op_type == META_OP_REQUIRE_ALL ) {
877 /* Looks like we didn't get a bind. Open a new session... */
879 mc = metaconn_alloc( op );
880 mc->mc_conn = mc_curr.mc_conn;
881 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
883 if ( sendok & LDAP_BACK_BINDING ) {
884 LDAP_BACK_CONN_BINDING_SET( mc );
888 for ( i = 0; i < mi->mi_ntargets; i++ ) {
889 metatarget_t *mt = &mi->mi_targets[ i ];
892 * The target is activated; if needed, it is
895 candidates[ i ].sr_err = meta_back_init_one_conn( op,
897 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
898 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
899 candidates[ i ].sr_tag = META_CANDIDATE;
905 * FIXME: in case one target cannot
906 * be init'd, should the other ones
909 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
910 err = candidates[ i ].sr_err;
915 if ( ncandidates == 0 ) {
917 meta_back_freeconn( op, mc );
920 meta_back_release_conn( op, mc );
923 rs->sr_err = LDAP_NO_SUCH_OBJECT;
924 rs->sr_text = "Unable to select valid candidates";
926 if ( sendok & LDAP_BACK_SENDERR ) {
927 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
928 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
930 send_ldap_result( op, rs );
932 rs->sr_matched = NULL;
942 * looks in cache, if any
944 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
945 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
948 if ( op_type == META_OP_REQUIRE_SINGLE ) {
949 metatarget_t *mt = NULL;
950 metasingleconn_t *msc = NULL;
954 for ( j = 0; j < mi->mi_ntargets; j++ ) {
955 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
959 * tries to get a unique candidate
960 * (takes care of default target)
962 if ( i == META_TARGET_NONE ) {
963 i = meta_back_get_candidate( op, rs, &ndn );
965 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
966 i = meta_back_get_candidate( op, rs, &pndn );
969 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
971 meta_back_release_conn( op, mc );
974 if ( sendok & LDAP_BACK_SENDERR ) {
975 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
976 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
978 send_ldap_result( op, rs );
980 rs->sr_matched = NULL;
987 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
990 meta_back_release_conn( op, mc );
993 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
994 rs->sr_text = "cross-target rename not supported";
995 if ( sendok & LDAP_BACK_SENDERR ) {
996 send_ldap_result( op, rs );
1003 Debug( LDAP_DEBUG_TRACE,
1004 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1005 i, op->o_req_ndn.bv_val, 0 );
1008 /* Retries searching for a metaconn in the avl tree
1009 * the reason is that the connection might have been
1010 * created by meta_back_get_candidate() */
1011 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1013 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1014 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1015 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1017 /* Don't reuse connections while they're still binding */
1018 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1019 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1020 ldap_pvt_thread_yield();
1026 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1029 /* Looks like we didn't get a bind. Open a new session... */
1031 mc = metaconn_alloc( op );
1032 mc->mc_conn = mc_curr.mc_conn;
1033 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1035 if ( sendok & LDAP_BACK_BINDING ) {
1036 LDAP_BACK_CONN_BINDING_SET( mc );
1042 * Clear all other candidates
1044 ( void )meta_clear_unused_candidates( op, i );
1046 mt = &mi->mi_targets[ i ];
1047 msc = &mc->mc_conns[ i ];
1050 * The target is activated; if needed, it is
1051 * also init'd. In case of error, meta_back_init_one_conn
1052 * sends the appropriate result.
1054 err = meta_back_init_one_conn( op, rs, mt, mc, i,
1055 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1056 if ( err != LDAP_SUCCESS ) {
1058 * FIXME: in case one target cannot
1059 * be init'd, should the other ones
1062 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1064 (void)meta_clear_one_candidate( msc );
1065 meta_back_freeconn( op, mc );
1068 meta_back_release_conn( op, mc );
1073 candidates[ i ].sr_err = LDAP_SUCCESS;
1074 candidates[ i ].sr_tag = META_CANDIDATE;
1082 * if no unique candidate ...
1086 /* Looks like we didn't get a bind. Open a new session... */
1088 mc = metaconn_alloc( op );
1089 mc->mc_conn = mc_curr.mc_conn;
1090 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1092 if ( sendok & LDAP_BACK_BINDING ) {
1093 LDAP_BACK_CONN_BINDING_SET( mc );
1097 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1098 metatarget_t *mt = &mi->mi_targets[ i ];
1099 metasingleconn_t *msc = &mc->mc_conns[ i ];
1102 || meta_back_is_candidate( &mt->mt_nsuffix,
1104 mt->mt_subtree_exclude,
1106 LDAP_SCOPE_SUBTREE ) )
1110 * The target is activated; if needed, it is
1113 int lerr = meta_back_init_one_conn( op, rs,
1115 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1117 if ( lerr == LDAP_SUCCESS ) {
1118 candidates[ i ].sr_tag = META_CANDIDATE;
1119 candidates[ i ].sr_err = LDAP_SUCCESS;
1122 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1123 op->o_log_prefix, i, 0 );
1128 * FIXME: in case one target cannot
1129 * be init'd, should the other ones
1133 ( void )meta_clear_one_candidate( msc );
1135 /* leave the target candidate, but record the error for later use */
1136 candidates[ i ].sr_err = lerr;
1139 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1140 op->o_log_prefix, i, lerr );
1147 ( void )meta_clear_one_candidate( msc );
1149 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1153 if ( ncandidates == 0 ) {
1155 meta_back_freeconn( op, mc );
1158 meta_back_release_conn( op, mc );
1161 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1162 rs->sr_text = "Unable to select valid candidates";
1164 if ( sendok & LDAP_BACK_SENDERR ) {
1165 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1166 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1168 send_ldap_result( op, rs );
1170 rs->sr_matched = NULL;
1178 /* clear out meta_back_init_one_conn non-fatal errors */
1179 rs->sr_err = LDAP_SUCCESS;
1182 /* touch the timestamp */
1183 if ( mi->mi_idle_timeout != 0 ) {
1184 mc->mc_time = op->o_time;
1188 if ( mi->mi_conn_ttl ) {
1189 mc->mc_create_time = op->o_time;
1193 * Inserts the newly created metaconn in the avl tree
1195 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1196 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1197 meta_back_conndn_cmp, meta_back_conndn_dup );
1199 #if PRINT_CONNTREE > 0
1200 myprint( mi->mi_conninfo.lai_tree );
1201 #endif /* PRINT_CONNTREE */
1203 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1206 * Err could be -1 in case a duplicate metaconn is inserted
1213 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1214 /* duplicate: free and try to get the newly created one */
1217 LDAP_BACK_CONN_TAINTED_SET( mc );
1221 Debug( LDAP_DEBUG_ANY,
1222 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1223 op->o_log_prefix, ncandidates,
1224 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1226 meta_back_freeconn( op, mc );
1228 rs->sr_err = LDAP_OTHER;
1229 rs->sr_text = "proxy bind collision";
1230 if ( sendok & LDAP_BACK_SENDERR ) {
1231 send_ldap_result( op, rs );
1237 Debug( LDAP_DEBUG_TRACE,
1238 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1239 op->o_log_prefix, ncandidates,
1240 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1243 Debug( LDAP_DEBUG_TRACE,
1244 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1245 op->o_log_prefix, ncandidates,
1246 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1253 meta_back_release_conn_lock(
1258 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1260 assert( mc != NULL );
1263 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1265 assert( mc->mc_refcnt > 0 );
1267 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1268 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1269 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld expired.\n",
1270 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1271 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1272 ( caddr_t )mc, meta_back_conndnmc_cmp );
1273 if ( mc->mc_refcnt == 0 ) {
1274 meta_clear_candidates( op, mc );
1275 meta_back_conn_free( mc );
1279 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );