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 if ( mt->mt_version != 0 ) {
289 version = mt->mt_version;
291 } else if ( op->o_conn->c_protocol != 0 ) {
292 version = op->o_conn->c_protocol;
295 version = LDAP_VERSION3;
297 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
299 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
300 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
301 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
304 /* start TLS ("tls [try-]{start|propagate}" statement) */
305 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
306 && !ldap_is_ldaps_url( mt->mt_uri ) )
308 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
310 * use asynchronous StartTLS; in case, chase referral
311 * FIXME: OpenLDAP does not return referral on StartTLS yet
315 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
316 if ( rs->sr_err == LDAP_SUCCESS ) {
317 LDAPMessage *res = NULL;
318 int rc, nretries = mt->mt_nretries;
321 LDAP_BACK_TV_SET( &tv );
324 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
326 rs->sr_err = LDAP_OTHER;
328 } else if ( rc == 0 ) {
329 if ( nretries != 0 ) {
330 if ( nretries > 0 ) {
333 LDAP_BACK_TV_SET( &tv );
336 rs->sr_err = LDAP_OTHER;
338 } else if ( rc == LDAP_RES_EXTENDED ) {
339 struct berval *data = NULL;
341 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
343 if ( rs->sr_err == LDAP_SUCCESS ) {
346 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
347 &err, NULL, NULL, NULL, NULL, 1 );
350 if ( rs->sr_err == LDAP_SUCCESS ) {
354 /* FIXME: in case a referral
355 * is returned, should we try
356 * using it instead of the
358 if ( rs->sr_err == LDAP_SUCCESS ) {
359 ldap_install_tls( msc->msc_ld );
361 } else if ( rs->sr_err == LDAP_REFERRAL ) {
362 rs->sr_err = LDAP_OTHER;
363 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
367 if ( data->bv_val ) {
368 ber_memfree( data->bv_val );
375 rs->sr_err = LDAP_OTHER;
382 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
384 * use synchronous StartTLS
386 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
387 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
389 /* if StartTLS is requested, only attempt it if the URL
390 * is not "ldaps://"; this may occur not only in case
391 * of misconfiguration, but also when used in the chain
392 * overlay, where the "uri" can be parsed out of a referral */
393 if ( rs->sr_err == LDAP_SERVER_DOWN
394 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
396 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
400 #endif /* HAVE_TLS */
403 * Set the network timeout if set
405 if ( mt->mt_network_timeout != 0 ) {
406 struct timeval network_timeout;
408 network_timeout.tv_usec = 0;
409 network_timeout.tv_sec = mt->mt_network_timeout;
411 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
412 (void *)&network_timeout );
416 * If the connection DN is not null, an attempt to rewrite it is made
420 if ( !BER_BVISNULL( &mt->mt_pseudorootdn ) ) {
421 ber_dupbv( &msc->msc_bound_ndn, &mt->mt_pseudorootdn );
422 if ( !BER_BVISNULL( &mt->mt_pseudorootpw ) ) {
423 ber_dupbv( &msc->msc_cred, &mt->mt_pseudorootpw );
427 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
430 LDAP_BACK_CONN_ISPRIV_SET( msc );
433 BER_BVZERO( &msc->msc_cred );
434 BER_BVZERO( &msc->msc_bound_ndn );
435 if ( !BER_BVISEMPTY( &op->o_ndn )
436 && SLAP_IS_AUTHZ_BACKEND( op )
440 dc.conn = op->o_conn;
445 * Rewrite the bind dn if needed
447 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
448 &msc->msc_bound_ndn ) )
450 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
454 /* copy the DN idf needed */
455 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
456 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
460 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
464 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
467 if ( rs->sr_err == LDAP_SUCCESS ) {
469 * Sets a cookie for the rewrite session
471 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
474 rs->sr_err = slap_map_api2result( rs );
475 if ( sendok & LDAP_BACK_SENDERR ) {
476 send_ldap_result( op, rs );
487 * Retries one connection
495 ldap_back_send_t sendok )
497 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
498 metatarget_t *mt = &mi->mi_targets[ candidate ];
499 metaconn_t *mc = *mcp;
500 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
501 int rc = LDAP_UNAVAILABLE,
502 binding = LDAP_BACK_CONN_BINDING( msc );
504 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
506 assert( mc->mc_refcnt > 0 );
507 if ( mc->mc_refcnt == 1 ) {
508 char buf[ SLAP_TEXT_BUFLEN ];
510 snprintf( buf, sizeof( buf ),
511 "retrying URI=\"%s\" DN=\"%s\"",
513 BER_BVISNULL( &msc->msc_bound_ndn ) ?
514 "" : msc->msc_bound_ndn.bv_val );
515 Debug( LDAP_DEBUG_ANY,
516 "%s meta_back_retry[%d]: %s.\n",
517 op->o_log_prefix, candidate, buf );
519 meta_clear_one_candidate( msc );
520 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
522 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
524 /* mc here must be the regular mc, reset and ready for init */
525 rc = meta_back_init_one_conn( op, rs, mt, mc, candidate,
526 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
528 LDAP_BACK_CONN_BINDING_SET( msc );
531 if ( rc == LDAP_SUCCESS ) {
532 rc = meta_back_single_dobind( op, rs, mcp, candidate,
533 sendok, mt->mt_nretries, 0 );
535 Debug( LDAP_DEBUG_ANY,
536 "%s meta_back_retry[%d]: "
537 "meta_back_single_dobind=%d\n",
538 op->o_log_prefix, candidate, rc );
539 if ( rc == LDAP_SUCCESS ) {
540 if ( be_isroot( op ) ) {
541 LDAP_BACK_CONN_ISBOUND_SET( msc );
543 LDAP_BACK_CONN_ISANON_SET( msc );
549 if ( rc != LDAP_SUCCESS ) {
550 SlapReply *candidates = meta_back_candidates_get( op );
552 candidates[ candidate ].sr_err = rc;
554 if ( *mcp != NULL ) {
556 LDAP_BACK_CONN_BINDING_CLEAR( msc );
558 LDAP_BACK_CONN_TAINTED_SET( mc );
559 /* only release if mandatory; otherwise
560 * let the caller do what's best before
562 if ( META_BACK_ONERR_STOP( mi ) ) {
563 meta_back_release_conn_lock( op, mc, 0 );
571 send_ldap_result( op, rs );
575 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
577 return rc == LDAP_SUCCESS ? 1 : 0;
581 * callback for unique candidate selection
584 meta_back_conn_cb( Operation *op, SlapReply *rs )
586 assert( op->o_tag == LDAP_REQ_SEARCH );
588 switch ( rs->sr_type ) {
590 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
606 meta_back_get_candidate(
611 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
615 * tries to get a unique candidate
616 * (takes care of default target)
618 candidate = meta_back_select_unique_candidate( mi, ndn );
621 * if any is found, inits the connection
623 if ( candidate == META_TARGET_NONE ) {
624 rs->sr_err = LDAP_NO_SUCH_OBJECT;
625 rs->sr_text = "no suitable candidate target found";
627 } else if ( candidate == META_TARGET_MULTIPLE ) {
630 SlapReply rs2 = { 0 };
631 slap_callback cb2 = { 0 };
634 /* try to get a unique match for the request ndn
635 * among the multiple candidates available */
636 op2.o_tag = LDAP_REQ_SEARCH;
638 op2.o_req_ndn = *ndn;
639 op2.ors_scope = LDAP_SCOPE_BASE;
640 op2.ors_deref = LDAP_DEREF_NEVER;
641 op2.ors_attrs = slap_anlist_no_attrs;
642 op2.ors_attrsonly = 0;
643 op2.ors_limit = NULL;
645 op2.ors_tlimit = SLAP_NO_LIMIT;
647 f.f_choice = LDAP_FILTER_PRESENT;
648 f.f_desc = slap_schema.si_ad_objectClass;
650 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
652 op2.o_callback = &cb2;
653 cb2.sc_response = meta_back_conn_cb;
654 cb2.sc_private = (void *)&candidate;
656 rc = op->o_bd->be_search( &op2, &rs2 );
658 switch ( rs2.sr_err ) {
661 rs->sr_err = rs2.sr_err;
664 case LDAP_SIZELIMIT_EXCEEDED:
665 /* if multiple candidates can serve the operation,
666 * and a default target is defined, and it is
667 * a candidate, try using it (FIXME: YMMV) */
668 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
669 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ].mt_nsuffix,
670 mi->mi_targets[ mi->mi_defaulttarget ].mt_scope,
671 mi->mi_targets[ mi->mi_defaulttarget ].mt_subtree_exclude,
672 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
674 candidate = mi->mi_defaulttarget;
675 rs->sr_err = LDAP_SUCCESS;
679 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
680 rs->sr_text = "cannot select unique candidate target";
686 rs->sr_err = LDAP_SUCCESS;
692 static void *meta_back_candidates_dummy;
695 meta_back_candidates_keyfree(
699 metacandidates_t *mc = (metacandidates_t *)data;
701 ber_memfree_x( mc->mc_candidates, NULL );
702 ber_memfree_x( data, NULL );
706 meta_back_candidates_get( Operation *op )
708 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
709 metacandidates_t *mc;
711 if ( op->o_threadctx ) {
714 ldap_pvt_thread_pool_getkey( op->o_threadctx,
715 &meta_back_candidates_dummy, &data, NULL );
716 mc = (metacandidates_t *)data;
719 mc = mi->mi_candidates;
723 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
724 mc->mc_ntargets = mi->mi_ntargets;
725 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
726 if ( op->o_threadctx ) {
730 ldap_pvt_thread_pool_setkey( op->o_threadctx,
731 &meta_back_candidates_dummy, data,
732 meta_back_candidates_keyfree );
735 mi->mi_candidates = mc;
738 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
739 /* NOTE: in the future, may want to allow back-config
740 * to add/remove targets from back-meta... */
741 mc->mc_ntargets = mi->mi_ntargets;
742 mc->mc_candidates = ch_realloc( mc->mc_candidates,
743 sizeof( SlapReply ) * mc->mc_ntargets );
746 return mc->mc_candidates;
752 * Prepares the connection structure
756 * - determine what DN is being requested:
758 * op requires candidate checks
760 * add unique parent of o_req_ndn
761 * bind unique^*[/all] o_req_ndn [no check]
762 * compare unique^+ o_req_ndn
763 * delete unique o_req_ndn
764 * modify unique o_req_ndn
765 * search any o_req_ndn
766 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
768 * - for ops that require the candidate to be unique, in case of multiple
769 * occurrences an internal search with sizeLimit=1 is performed
770 * if a unique candidate can actually be determined. If none is found,
771 * the operation aborts; if multiple are found, the default target
772 * is used if defined and candidate; otherwise the operation aborts.
774 * *^note: actually, the bind operation is handled much like a search;
775 * i.e. the bind is broadcast to all candidate targets.
777 * +^note: actually, the compare operation is handled much like a search;
778 * i.e. the compare is broadcast to all candidate targets, while checking
779 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
787 ldap_back_send_t sendok )
789 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
790 metaconn_t *mc = NULL,
792 int cached = META_TARGET_NONE,
793 i = META_TARGET_NONE,
799 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
803 META_DNTYPE_NEWPARENT
804 } dn_type = META_DNTYPE_ENTRY;
805 struct berval ndn = op->o_req_ndn,
808 SlapReply *candidates = meta_back_candidates_get( op );
810 /* Internal searches are privileged and shared. So is root. */
811 /* FIXME: there seem to be concurrency issues */
812 if ( op->o_do_not_cache || be_isroot( op ) ) {
813 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
814 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
815 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
818 mc_curr.mc_local_ndn = op->o_ndn;
820 /* Explicit binds must not be shared */
821 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
822 mc_curr.mc_conn = op->o_conn;
825 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
829 /* Explicit Bind requests always get their own conn */
830 if ( !( sendok & LDAP_BACK_BINDING ) ) {
831 /* Searches for a metaconn in the avl tree */
833 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
834 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
835 (caddr_t)&mc_curr, meta_back_conndn_cmp );
837 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
838 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
840 /* don't let anyone else use this expired connection */
841 (void)avl_delete( &mi->mi_conninfo.lai_tree,
842 (caddr_t)mc, meta_back_conndnmc_cmp );
843 LDAP_BACK_CONN_TAINTED_SET( mc );
845 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
846 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
849 /* Don't reuse connections while they're still binding */
850 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
851 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
852 ldap_pvt_thread_yield();
858 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
861 switch ( op->o_tag ) {
863 /* if we go to selection, the entry must not exist,
864 * and we must be able to resolve the parent */
865 dn_type = META_DNTYPE_PARENT;
866 dnParent( &ndn, &pndn );
869 case LDAP_REQ_MODRDN:
870 /* if nnewSuperior is not NULL, it must resolve
871 * to the same candidate as the req_ndn */
872 if ( op->orr_nnewSup ) {
873 dn_type = META_DNTYPE_NEWPARENT;
878 /* if bound as rootdn, the backend must bind to all targets
879 * with the administrative identity */
880 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
881 op_type = META_OP_REQUIRE_ALL;
885 case LDAP_REQ_DELETE:
886 case LDAP_REQ_MODIFY:
887 /* just a unique candidate */
890 case LDAP_REQ_COMPARE:
891 case LDAP_REQ_SEARCH:
892 /* allow multiple candidates for the searchBase */
893 op_type = META_OP_ALLOW_MULTIPLE;
897 /* right now, just break (exop?) */
902 * require all connections ...
904 if ( op_type == META_OP_REQUIRE_ALL ) {
906 /* Looks like we didn't get a bind. Open a new session... */
908 mc = metaconn_alloc( op );
909 mc->mc_conn = mc_curr.mc_conn;
910 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
912 if ( sendok & LDAP_BACK_BINDING ) {
913 LDAP_BACK_CONN_BINDING_SET( mc );
917 for ( i = 0; i < mi->mi_ntargets; i++ ) {
918 metatarget_t *mt = &mi->mi_targets[ i ];
921 * The target is activated; if needed, it is
924 candidates[ i ].sr_err = meta_back_init_one_conn( op,
926 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
927 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
928 candidates[ i ].sr_tag = META_CANDIDATE;
934 * FIXME: in case one target cannot
935 * be init'd, should the other ones
938 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
939 err = candidates[ i ].sr_err;
944 if ( ncandidates == 0 ) {
946 meta_back_freeconn( op, mc );
949 meta_back_release_conn( op, mc );
952 rs->sr_err = LDAP_NO_SUCH_OBJECT;
953 rs->sr_text = "Unable to select valid candidates";
955 if ( sendok & LDAP_BACK_SENDERR ) {
956 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
957 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
959 send_ldap_result( op, rs );
961 rs->sr_matched = NULL;
971 * looks in cache, if any
973 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
974 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
977 if ( op_type == META_OP_REQUIRE_SINGLE ) {
978 metatarget_t *mt = NULL;
979 metasingleconn_t *msc = NULL;
983 for ( j = 0; j < mi->mi_ntargets; j++ ) {
984 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
988 * tries to get a unique candidate
989 * (takes care of default target)
991 if ( i == META_TARGET_NONE ) {
992 i = meta_back_get_candidate( op, rs, &ndn );
994 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
995 i = meta_back_get_candidate( op, rs, &pndn );
998 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1000 meta_back_release_conn( op, mc );
1003 if ( sendok & LDAP_BACK_SENDERR ) {
1004 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1005 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1007 send_ldap_result( op, rs );
1009 rs->sr_matched = NULL;
1016 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1019 meta_back_release_conn( op, mc );
1022 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1023 rs->sr_text = "cross-target rename not supported";
1024 if ( sendok & LDAP_BACK_SENDERR ) {
1025 send_ldap_result( op, rs );
1032 Debug( LDAP_DEBUG_TRACE,
1033 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1034 i, op->o_req_ndn.bv_val, 0 );
1037 /* Retries searching for a metaconn in the avl tree
1038 * the reason is that the connection might have been
1039 * created by meta_back_get_candidate() */
1040 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1042 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1043 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1044 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1046 /* Don't reuse connections while they're still binding */
1047 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1048 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1049 ldap_pvt_thread_yield();
1055 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1058 /* Looks like we didn't get a bind. Open a new session... */
1060 mc = metaconn_alloc( op );
1061 mc->mc_conn = mc_curr.mc_conn;
1062 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1064 if ( sendok & LDAP_BACK_BINDING ) {
1065 LDAP_BACK_CONN_BINDING_SET( mc );
1071 * Clear all other candidates
1073 ( void )meta_clear_unused_candidates( op, i );
1075 mt = &mi->mi_targets[ i ];
1076 msc = &mc->mc_conns[ i ];
1079 * The target is activated; if needed, it is
1080 * also init'd. In case of error, meta_back_init_one_conn
1081 * sends the appropriate result.
1083 err = meta_back_init_one_conn( op, rs, mt, mc, i,
1084 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1085 if ( err != LDAP_SUCCESS ) {
1087 * FIXME: in case one target cannot
1088 * be init'd, should the other ones
1091 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1093 (void)meta_clear_one_candidate( msc );
1094 meta_back_freeconn( op, mc );
1097 meta_back_release_conn( op, mc );
1102 candidates[ i ].sr_err = LDAP_SUCCESS;
1103 candidates[ i ].sr_tag = META_CANDIDATE;
1111 * if no unique candidate ...
1115 /* Looks like we didn't get a bind. Open a new session... */
1117 mc = metaconn_alloc( op );
1118 mc->mc_conn = mc_curr.mc_conn;
1119 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1121 if ( sendok & LDAP_BACK_BINDING ) {
1122 LDAP_BACK_CONN_BINDING_SET( mc );
1126 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1127 metatarget_t *mt = &mi->mi_targets[ i ];
1128 metasingleconn_t *msc = &mc->mc_conns[ i ];
1131 || meta_back_is_candidate( &mt->mt_nsuffix,
1133 mt->mt_subtree_exclude,
1135 LDAP_SCOPE_SUBTREE ) )
1139 * The target is activated; if needed, it is
1142 int lerr = meta_back_init_one_conn( op, rs,
1144 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1146 if ( lerr == LDAP_SUCCESS ) {
1147 candidates[ i ].sr_tag = META_CANDIDATE;
1148 candidates[ i ].sr_err = LDAP_SUCCESS;
1151 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1152 op->o_log_prefix, i, 0 );
1157 * FIXME: in case one target cannot
1158 * be init'd, should the other ones
1162 ( void )meta_clear_one_candidate( msc );
1164 /* leave the target candidate, but record the error for later use */
1165 candidates[ i ].sr_err = lerr;
1168 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1169 op->o_log_prefix, i, lerr );
1176 ( void )meta_clear_one_candidate( msc );
1178 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1182 if ( ncandidates == 0 ) {
1184 meta_back_freeconn( op, mc );
1187 meta_back_release_conn( op, mc );
1190 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1191 rs->sr_text = "Unable to select valid candidates";
1193 if ( sendok & LDAP_BACK_SENDERR ) {
1194 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1195 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1197 send_ldap_result( op, rs );
1199 rs->sr_matched = NULL;
1207 /* clear out meta_back_init_one_conn non-fatal errors */
1208 rs->sr_err = LDAP_SUCCESS;
1211 /* touch the timestamp */
1212 if ( mi->mi_idle_timeout != 0 ) {
1213 mc->mc_time = op->o_time;
1217 if ( mi->mi_conn_ttl ) {
1218 mc->mc_create_time = op->o_time;
1222 * Inserts the newly created metaconn in the avl tree
1224 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1225 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1226 meta_back_conndn_cmp, meta_back_conndn_dup );
1228 #if PRINT_CONNTREE > 0
1229 myprint( mi->mi_conninfo.lai_tree );
1230 #endif /* PRINT_CONNTREE */
1232 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1235 * Err could be -1 in case a duplicate metaconn is inserted
1242 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1243 /* duplicate: free and try to get the newly created one */
1246 LDAP_BACK_CONN_TAINTED_SET( mc );
1250 Debug( LDAP_DEBUG_ANY,
1251 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1252 op->o_log_prefix, ncandidates,
1253 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1255 meta_back_freeconn( op, mc );
1257 rs->sr_err = LDAP_OTHER;
1258 rs->sr_text = "proxy bind collision";
1259 if ( sendok & LDAP_BACK_SENDERR ) {
1260 send_ldap_result( op, rs );
1266 Debug( LDAP_DEBUG_TRACE,
1267 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1268 op->o_log_prefix, ncandidates,
1269 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1272 Debug( LDAP_DEBUG_TRACE,
1273 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1274 op->o_log_prefix, ncandidates,
1275 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1282 meta_back_release_conn_lock(
1287 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1289 assert( mc != NULL );
1292 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1294 assert( mc->mc_refcnt > 0 );
1296 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1297 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1298 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld expired.\n",
1299 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1300 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1301 ( caddr_t )mc, meta_back_conndnmc_cmp );
1302 if ( mc->mc_refcnt == 0 ) {
1303 meta_clear_candidates( op, mc );
1304 meta_back_conn_free( mc );
1308 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );