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 );
537 if ( rc != LDAP_SUCCESS ) {
538 if ( *mcp != NULL ) {
540 LDAP_BACK_CONN_BINDING_CLEAR( msc );
542 LDAP_BACK_CONN_TAINTED_SET( mc );
543 meta_back_release_conn_lock( op, mc, 0 );
548 rs->sr_err = LDAP_UNAVAILABLE;
550 send_ldap_result( op, rs );
554 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
556 return rc == LDAP_SUCCESS ? 1 : 0;
560 * callback for unique candidate selection
563 meta_back_conn_cb( Operation *op, SlapReply *rs )
565 assert( op->o_tag == LDAP_REQ_SEARCH );
567 switch ( rs->sr_type ) {
569 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
585 meta_back_get_candidate(
590 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
594 * tries to get a unique candidate
595 * (takes care of default target)
597 candidate = meta_back_select_unique_candidate( mi, ndn );
600 * if any is found, inits the connection
602 if ( candidate == META_TARGET_NONE ) {
603 rs->sr_err = LDAP_NO_SUCH_OBJECT;
604 rs->sr_text = "no suitable candidate target found";
606 } else if ( candidate == META_TARGET_MULTIPLE ) {
609 SlapReply rs2 = { 0 };
610 slap_callback cb2 = { 0 };
613 /* try to get a unique match for the request ndn
614 * among the multiple candidates available */
615 op2.o_tag = LDAP_REQ_SEARCH;
617 op2.o_req_ndn = *ndn;
618 op2.ors_scope = LDAP_SCOPE_BASE;
619 op2.ors_deref = LDAP_DEREF_NEVER;
620 op2.ors_attrs = slap_anlist_no_attrs;
621 op2.ors_attrsonly = 0;
622 op2.ors_limit = NULL;
624 op2.ors_tlimit = SLAP_NO_LIMIT;
626 f.f_choice = LDAP_FILTER_PRESENT;
627 f.f_desc = slap_schema.si_ad_objectClass;
629 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
631 op2.o_callback = &cb2;
632 cb2.sc_response = meta_back_conn_cb;
633 cb2.sc_private = (void *)&candidate;
635 rc = op->o_bd->be_search( &op2, &rs2 );
637 switch ( rs2.sr_err ) {
640 rs->sr_err = rs2.sr_err;
643 case LDAP_SIZELIMIT_EXCEEDED:
644 /* if multiple candidates can serve the operation,
645 * and a default target is defined, and it is
646 * a candidate, try using it (FIXME: YMMV) */
647 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
648 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ].mt_nsuffix,
649 mi->mi_targets[ mi->mi_defaulttarget ].mt_scope,
650 mi->mi_targets[ mi->mi_defaulttarget ].mt_subtree_exclude,
651 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
653 candidate = mi->mi_defaulttarget;
654 rs->sr_err = LDAP_SUCCESS;
658 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
659 rs->sr_text = "cannot select unique candidate target";
665 rs->sr_err = LDAP_SUCCESS;
671 static void *meta_back_candidates_dummy;
674 meta_back_candidates_keyfree(
678 metacandidates_t *mc = (metacandidates_t *)data;
680 ber_memfree_x( mc->mc_candidates, NULL );
681 ber_memfree_x( data, NULL );
685 meta_back_candidates_get( Operation *op )
687 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
688 metacandidates_t *mc;
690 if ( op->o_threadctx ) {
693 ldap_pvt_thread_pool_getkey( op->o_threadctx,
694 &meta_back_candidates_dummy, &data, NULL );
695 mc = (metacandidates_t *)data;
698 mc = mi->mi_candidates;
702 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
703 mc->mc_ntargets = mi->mi_ntargets;
704 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
705 if ( op->o_threadctx ) {
709 ldap_pvt_thread_pool_setkey( op->o_threadctx,
710 &meta_back_candidates_dummy, data,
711 meta_back_candidates_keyfree );
714 mi->mi_candidates = mc;
717 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
718 /* NOTE: in the future, may want to allow back-config
719 * to add/remove targets from back-meta... */
720 mc->mc_ntargets = mi->mi_ntargets;
721 mc->mc_candidates = ch_realloc( mc->mc_candidates,
722 sizeof( SlapReply ) * mc->mc_ntargets );
725 return mc->mc_candidates;
731 * Prepares the connection structure
735 * - determine what DN is being requested:
737 * op requires candidate checks
739 * add unique parent of o_req_ndn
740 * bind unique^*[/all] o_req_ndn [no check]
741 * compare unique^+ o_req_ndn
742 * delete unique o_req_ndn
743 * modify unique o_req_ndn
744 * search any o_req_ndn
745 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
747 * - for ops that require the candidate to be unique, in case of multiple
748 * occurrences an internal search with sizeLimit=1 is performed
749 * if a unique candidate can actually be determined. If none is found,
750 * the operation aborts; if multiple are found, the default target
751 * is used if defined and candidate; otherwise the operation aborts.
753 * *^note: actually, the bind operation is handled much like a search;
754 * i.e. the bind is broadcast to all candidate targets.
756 * +^note: actually, the compare operation is handled much like a search;
757 * i.e. the compare is broadcast to all candidate targets, while checking
758 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
766 ldap_back_send_t sendok )
768 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
769 metaconn_t *mc = NULL,
771 int cached = META_TARGET_NONE,
772 i = META_TARGET_NONE,
778 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
782 META_DNTYPE_NEWPARENT
783 } dn_type = META_DNTYPE_ENTRY;
784 struct berval ndn = op->o_req_ndn,
787 SlapReply *candidates = meta_back_candidates_get( op );
789 /* Internal searches are privileged and shared. So is root. */
790 /* FIXME: there seem to be concurrency issues */
791 if ( op->o_do_not_cache || be_isroot( op ) ) {
792 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
793 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
794 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
797 mc_curr.mc_local_ndn = op->o_ndn;
799 /* Explicit binds must not be shared */
800 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
801 mc_curr.mc_conn = op->o_conn;
804 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
808 /* Explicit Bind requests always get their own conn */
809 if ( !( sendok & LDAP_BACK_BINDING ) ) {
810 /* Searches for a metaconn in the avl tree */
812 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
813 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
814 (caddr_t)&mc_curr, meta_back_conndn_cmp );
816 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
817 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
819 /* don't let anyone else use this expired connection */
820 (void)avl_delete( &mi->mi_conninfo.lai_tree,
821 (caddr_t)mc, meta_back_conndnmc_cmp );
822 LDAP_BACK_CONN_TAINTED_SET( mc );
824 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
825 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
828 /* Don't reuse connections while they're still binding */
829 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
830 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
831 ldap_pvt_thread_yield();
837 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
840 switch ( op->o_tag ) {
842 /* if we go to selection, the entry must not exist,
843 * and we must be able to resolve the parent */
844 dn_type = META_DNTYPE_PARENT;
845 dnParent( &ndn, &pndn );
848 case LDAP_REQ_MODRDN:
849 /* if nnewSuperior is not NULL, it must resolve
850 * to the same candidate as the req_ndn */
851 if ( op->orr_nnewSup ) {
852 dn_type = META_DNTYPE_NEWPARENT;
857 /* if bound as rootdn, the backend must bind to all targets
858 * with the administrative identity */
859 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
860 op_type = META_OP_REQUIRE_ALL;
864 case LDAP_REQ_DELETE:
865 case LDAP_REQ_MODIFY:
866 /* just a unique candidate */
869 case LDAP_REQ_COMPARE:
870 case LDAP_REQ_SEARCH:
871 /* allow multiple candidates for the searchBase */
872 op_type = META_OP_ALLOW_MULTIPLE;
876 /* right now, just break (exop?) */
881 * require all connections ...
883 if ( op_type == META_OP_REQUIRE_ALL ) {
885 /* Looks like we didn't get a bind. Open a new session... */
887 mc = metaconn_alloc( op );
888 mc->mc_conn = mc_curr.mc_conn;
889 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
891 if ( sendok & LDAP_BACK_BINDING ) {
892 LDAP_BACK_CONN_BINDING_SET( mc );
896 for ( i = 0; i < mi->mi_ntargets; i++ ) {
897 metatarget_t *mt = &mi->mi_targets[ i ];
900 * The target is activated; if needed, it is
903 candidates[ i ].sr_err = meta_back_init_one_conn( op,
905 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
906 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
907 candidates[ i ].sr_tag = META_CANDIDATE;
913 * FIXME: in case one target cannot
914 * be init'd, should the other ones
917 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
918 err = candidates[ i ].sr_err;
923 if ( ncandidates == 0 ) {
925 meta_back_freeconn( op, mc );
928 meta_back_release_conn( op, mc );
931 rs->sr_err = LDAP_NO_SUCH_OBJECT;
932 rs->sr_text = "Unable to select valid candidates";
934 if ( sendok & LDAP_BACK_SENDERR ) {
935 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
936 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
938 send_ldap_result( op, rs );
940 rs->sr_matched = NULL;
950 * looks in cache, if any
952 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
953 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
956 if ( op_type == META_OP_REQUIRE_SINGLE ) {
957 metatarget_t *mt = NULL;
958 metasingleconn_t *msc = NULL;
962 for ( j = 0; j < mi->mi_ntargets; j++ ) {
963 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
967 * tries to get a unique candidate
968 * (takes care of default target)
970 if ( i == META_TARGET_NONE ) {
971 i = meta_back_get_candidate( op, rs, &ndn );
973 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
974 i = meta_back_get_candidate( op, rs, &pndn );
977 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
979 meta_back_release_conn( op, mc );
982 if ( sendok & LDAP_BACK_SENDERR ) {
983 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
984 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
986 send_ldap_result( op, rs );
988 rs->sr_matched = NULL;
995 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
998 meta_back_release_conn( op, mc );
1001 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1002 rs->sr_text = "cross-target rename not supported";
1003 if ( sendok & LDAP_BACK_SENDERR ) {
1004 send_ldap_result( op, rs );
1011 Debug( LDAP_DEBUG_TRACE,
1012 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1013 i, op->o_req_ndn.bv_val, 0 );
1016 /* Retries searching for a metaconn in the avl tree
1017 * the reason is that the connection might have been
1018 * created by meta_back_get_candidate() */
1019 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1021 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1022 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1023 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1025 /* Don't reuse connections while they're still binding */
1026 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1027 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1028 ldap_pvt_thread_yield();
1034 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1037 /* Looks like we didn't get a bind. Open a new session... */
1039 mc = metaconn_alloc( op );
1040 mc->mc_conn = mc_curr.mc_conn;
1041 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1043 if ( sendok & LDAP_BACK_BINDING ) {
1044 LDAP_BACK_CONN_BINDING_SET( mc );
1050 * Clear all other candidates
1052 ( void )meta_clear_unused_candidates( op, i );
1054 mt = &mi->mi_targets[ i ];
1055 msc = &mc->mc_conns[ i ];
1058 * The target is activated; if needed, it is
1059 * also init'd. In case of error, meta_back_init_one_conn
1060 * sends the appropriate result.
1062 err = meta_back_init_one_conn( op, rs, mt, mc, i,
1063 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1064 if ( err != LDAP_SUCCESS ) {
1066 * FIXME: in case one target cannot
1067 * be init'd, should the other ones
1070 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1072 (void)meta_clear_one_candidate( msc );
1073 meta_back_freeconn( op, mc );
1076 meta_back_release_conn( op, mc );
1081 candidates[ i ].sr_err = LDAP_SUCCESS;
1082 candidates[ i ].sr_tag = META_CANDIDATE;
1090 * if no unique candidate ...
1094 /* Looks like we didn't get a bind. Open a new session... */
1096 mc = metaconn_alloc( op );
1097 mc->mc_conn = mc_curr.mc_conn;
1098 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1100 if ( sendok & LDAP_BACK_BINDING ) {
1101 LDAP_BACK_CONN_BINDING_SET( mc );
1105 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1106 metatarget_t *mt = &mi->mi_targets[ i ];
1107 metasingleconn_t *msc = &mc->mc_conns[ i ];
1110 || meta_back_is_candidate( &mt->mt_nsuffix,
1112 mt->mt_subtree_exclude,
1114 LDAP_SCOPE_SUBTREE ) )
1118 * The target is activated; if needed, it is
1121 int lerr = meta_back_init_one_conn( op, rs,
1123 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1125 if ( lerr == LDAP_SUCCESS ) {
1126 candidates[ i ].sr_tag = META_CANDIDATE;
1127 candidates[ i ].sr_err = LDAP_SUCCESS;
1130 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1131 op->o_log_prefix, i, 0 );
1136 * FIXME: in case one target cannot
1137 * be init'd, should the other ones
1141 ( void )meta_clear_one_candidate( msc );
1143 /* leave the target candidate, but record the error for later use */
1144 candidates[ i ].sr_err = lerr;
1147 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1148 op->o_log_prefix, i, lerr );
1155 ( void )meta_clear_one_candidate( msc );
1157 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1161 if ( ncandidates == 0 ) {
1163 meta_back_freeconn( op, mc );
1166 meta_back_release_conn( op, mc );
1169 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1170 rs->sr_text = "Unable to select valid candidates";
1172 if ( sendok & LDAP_BACK_SENDERR ) {
1173 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1174 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1176 send_ldap_result( op, rs );
1178 rs->sr_matched = NULL;
1186 /* clear out meta_back_init_one_conn non-fatal errors */
1187 rs->sr_err = LDAP_SUCCESS;
1190 /* touch the timestamp */
1191 if ( mi->mi_idle_timeout != 0 ) {
1192 mc->mc_time = op->o_time;
1196 if ( mi->mi_conn_ttl ) {
1197 mc->mc_create_time = op->o_time;
1201 * Inserts the newly created metaconn in the avl tree
1203 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1204 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1205 meta_back_conndn_cmp, meta_back_conndn_dup );
1207 #if PRINT_CONNTREE > 0
1208 myprint( mi->mi_conninfo.lai_tree );
1209 #endif /* PRINT_CONNTREE */
1211 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1214 * Err could be -1 in case a duplicate metaconn is inserted
1221 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1222 /* duplicate: free and try to get the newly created one */
1225 LDAP_BACK_CONN_TAINTED_SET( mc );
1229 Debug( LDAP_DEBUG_ANY,
1230 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1231 op->o_log_prefix, ncandidates,
1232 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1234 meta_back_freeconn( op, mc );
1236 rs->sr_err = LDAP_OTHER;
1237 rs->sr_text = "proxy bind collision";
1238 if ( sendok & LDAP_BACK_SENDERR ) {
1239 send_ldap_result( op, rs );
1245 Debug( LDAP_DEBUG_TRACE,
1246 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1247 op->o_log_prefix, ncandidates,
1248 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1251 Debug( LDAP_DEBUG_TRACE,
1252 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1253 op->o_log_prefix, ncandidates,
1254 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1261 meta_back_release_conn_lock(
1266 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1268 assert( mc != NULL );
1271 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1273 assert( mc->mc_refcnt > 0 );
1275 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1276 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1277 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld expired.\n",
1278 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1279 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1280 ( caddr_t )mc, meta_back_conndnmc_cmp );
1281 if ( mc->mc_refcnt == 0 ) {
1282 meta_clear_candidates( op, mc );
1283 meta_back_conn_free( mc );
1287 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );