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 );
268 #endif /* HAVE_TLS */
273 if ( msc->msc_ld != NULL ) {
274 return rs->sr_err = LDAP_SUCCESS;
277 msc->msc_mscflags = 0;
280 * Attempts to initialize the connection to the target ds
282 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
283 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
285 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
286 #endif /* HAVE_TLS */
287 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
288 if ( rs->sr_err != LDAP_SUCCESS ) {
293 * Set LDAP version. This will always succeed: If the client
294 * bound with a particular version, then so can we.
296 if ( mt->mt_version != 0 ) {
297 version = mt->mt_version;
299 } else if ( op->o_conn->c_protocol != 0 ) {
300 version = op->o_conn->c_protocol;
303 version = LDAP_VERSION3;
305 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
306 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
308 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
309 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
310 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
313 /* start TLS ("tls [try-]{start|propagate}" statement) */
314 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
317 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
319 * use asynchronous StartTLS; in case, chase referral
320 * FIXME: OpenLDAP does not return referral on StartTLS yet
324 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
325 if ( rs->sr_err == LDAP_SUCCESS ) {
326 LDAPMessage *res = NULL;
327 int rc, nretries = mt->mt_nretries;
330 LDAP_BACK_TV_SET( &tv );
333 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
335 rs->sr_err = LDAP_OTHER;
337 } else if ( rc == 0 ) {
338 if ( nretries != 0 ) {
339 if ( nretries > 0 ) {
342 LDAP_BACK_TV_SET( &tv );
345 rs->sr_err = LDAP_OTHER;
347 } else if ( rc == LDAP_RES_EXTENDED ) {
348 struct berval *data = NULL;
350 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
352 if ( rs->sr_err == LDAP_SUCCESS ) {
355 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
356 &err, NULL, NULL, NULL, NULL, 1 );
359 if ( rs->sr_err == LDAP_SUCCESS ) {
363 /* FIXME: in case a referral
364 * is returned, should we try
365 * using it instead of the
367 if ( rs->sr_err == LDAP_SUCCESS ) {
368 ldap_install_tls( msc->msc_ld );
370 } else if ( rs->sr_err == LDAP_REFERRAL ) {
371 rs->sr_err = LDAP_OTHER;
372 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
376 if ( data->bv_val ) {
377 ber_memfree( data->bv_val );
384 rs->sr_err = LDAP_OTHER;
391 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
393 * use synchronous StartTLS
395 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
396 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
398 /* if StartTLS is requested, only attempt it if the URL
399 * is not "ldaps://"; this may occur not only in case
400 * of misconfiguration, but also when used in the chain
401 * overlay, where the "uri" can be parsed out of a referral */
402 if ( rs->sr_err == LDAP_SERVER_DOWN
403 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
405 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
409 #endif /* HAVE_TLS */
412 * Set the network timeout if set
414 if ( mt->mt_network_timeout != 0 ) {
415 struct timeval network_timeout;
417 network_timeout.tv_usec = 0;
418 network_timeout.tv_sec = mt->mt_network_timeout;
420 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
421 (void *)&network_timeout );
425 * If the connection DN is not null, an attempt to rewrite it is made
429 if ( !BER_BVISNULL( &mt->mt_pseudorootdn ) ) {
430 ber_dupbv( &msc->msc_bound_ndn, &mt->mt_pseudorootdn );
431 if ( !BER_BVISNULL( &mt->mt_pseudorootpw ) ) {
432 ber_dupbv( &msc->msc_cred, &mt->mt_pseudorootpw );
436 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
439 LDAP_BACK_CONN_ISPRIV_SET( msc );
442 BER_BVZERO( &msc->msc_cred );
443 BER_BVZERO( &msc->msc_bound_ndn );
444 if ( !BER_BVISEMPTY( &op->o_ndn )
445 && SLAP_IS_AUTHZ_BACKEND( op )
449 dc.conn = op->o_conn;
454 * Rewrite the bind dn if needed
456 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
457 &msc->msc_bound_ndn ) )
459 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
463 /* copy the DN idf needed */
464 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
465 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
469 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
473 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
476 if ( rs->sr_err == LDAP_SUCCESS ) {
478 * Sets a cookie for the rewrite session
480 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
483 rs->sr_err = slap_map_api2result( rs );
484 if ( sendok & LDAP_BACK_SENDERR ) {
485 send_ldap_result( op, rs );
496 * Retries one connection
504 ldap_back_send_t sendok )
506 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
507 metatarget_t *mt = mi->mi_targets[ candidate ];
508 metaconn_t *mc = *mcp;
509 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
510 int rc = LDAP_UNAVAILABLE,
511 binding = LDAP_BACK_CONN_BINDING( msc );
513 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
515 assert( mc->mc_refcnt > 0 );
516 if ( mc->mc_refcnt == 1 ) {
517 if ( LogTest( LDAP_DEBUG_ANY ) ) {
518 char buf[ SLAP_TEXT_BUFLEN ];
520 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
521 snprintf( buf, sizeof( buf ),
522 "retrying URI=\"%s\" DN=\"%s\"",
524 BER_BVISNULL( &msc->msc_bound_ndn ) ?
525 "" : msc->msc_bound_ndn.bv_val );
526 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
528 Debug( LDAP_DEBUG_ANY,
529 "%s meta_back_retry[%d]: %s.\n",
530 op->o_log_prefix, candidate, buf );
533 meta_clear_one_candidate( msc );
534 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
536 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
538 /* mc here must be the regular mc, reset and ready for init */
539 rc = meta_back_init_one_conn( op, rs, mt, mc, candidate,
540 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
542 LDAP_BACK_CONN_BINDING_SET( msc );
545 if ( rc == LDAP_SUCCESS ) {
546 rc = meta_back_single_dobind( op, rs, mcp, candidate,
547 sendok, mt->mt_nretries, 0 );
549 Debug( LDAP_DEBUG_ANY,
550 "%s meta_back_retry[%d]: "
551 "meta_back_single_dobind=%d\n",
552 op->o_log_prefix, candidate, rc );
553 if ( rc == LDAP_SUCCESS ) {
554 if ( be_isroot( op ) ) {
555 LDAP_BACK_CONN_ISBOUND_SET( msc );
557 LDAP_BACK_CONN_ISANON_SET( msc );
563 if ( rc != LDAP_SUCCESS ) {
564 SlapReply *candidates = meta_back_candidates_get( op );
566 candidates[ candidate ].sr_err = rc;
568 if ( *mcp != NULL ) {
570 LDAP_BACK_CONN_BINDING_CLEAR( msc );
572 LDAP_BACK_CONN_TAINTED_SET( mc );
573 /* only release if mandatory; otherwise
574 * let the caller do what's best before
576 if ( META_BACK_ONERR_STOP( mi ) ) {
577 meta_back_release_conn_lock( op, mc, 0 );
585 send_ldap_result( op, rs );
589 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
591 return rc == LDAP_SUCCESS ? 1 : 0;
595 * callback for unique candidate selection
598 meta_back_conn_cb( Operation *op, SlapReply *rs )
600 assert( op->o_tag == LDAP_REQ_SEARCH );
602 switch ( rs->sr_type ) {
604 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
620 meta_back_get_candidate(
625 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
629 * tries to get a unique candidate
630 * (takes care of default target)
632 candidate = meta_back_select_unique_candidate( mi, ndn );
635 * if any is found, inits the connection
637 if ( candidate == META_TARGET_NONE ) {
638 rs->sr_err = LDAP_NO_SUCH_OBJECT;
639 rs->sr_text = "no suitable candidate target found";
641 } else if ( candidate == META_TARGET_MULTIPLE ) {
644 SlapReply rs2 = { 0 };
645 slap_callback cb2 = { 0 };
648 /* try to get a unique match for the request ndn
649 * among the multiple candidates available */
650 op2.o_tag = LDAP_REQ_SEARCH;
652 op2.o_req_ndn = *ndn;
653 op2.ors_scope = LDAP_SCOPE_BASE;
654 op2.ors_deref = LDAP_DEREF_NEVER;
655 op2.ors_attrs = slap_anlist_no_attrs;
656 op2.ors_attrsonly = 0;
657 op2.ors_limit = NULL;
659 op2.ors_tlimit = SLAP_NO_LIMIT;
661 f.f_choice = LDAP_FILTER_PRESENT;
662 f.f_desc = slap_schema.si_ad_objectClass;
664 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
666 op2.o_callback = &cb2;
667 cb2.sc_response = meta_back_conn_cb;
668 cb2.sc_private = (void *)&candidate;
670 rc = op->o_bd->be_search( &op2, &rs2 );
672 switch ( rs2.sr_err ) {
675 rs->sr_err = rs2.sr_err;
678 case LDAP_SIZELIMIT_EXCEEDED:
679 /* if multiple candidates can serve the operation,
680 * and a default target is defined, and it is
681 * a candidate, try using it (FIXME: YMMV) */
682 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
683 && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ]->mt_nsuffix,
684 mi->mi_targets[ mi->mi_defaulttarget ]->mt_scope,
685 mi->mi_targets[ mi->mi_defaulttarget ]->mt_subtree_exclude,
686 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
688 candidate = mi->mi_defaulttarget;
689 rs->sr_err = LDAP_SUCCESS;
693 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
694 rs->sr_text = "cannot select unique candidate target";
700 rs->sr_err = LDAP_SUCCESS;
706 static void *meta_back_candidates_dummy;
709 meta_back_candidates_keyfree(
713 metacandidates_t *mc = (metacandidates_t *)data;
715 ber_memfree_x( mc->mc_candidates, NULL );
716 ber_memfree_x( data, NULL );
720 meta_back_candidates_get( Operation *op )
722 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
723 metacandidates_t *mc;
725 if ( op->o_threadctx ) {
728 ldap_pvt_thread_pool_getkey( op->o_threadctx,
729 &meta_back_candidates_dummy, &data, NULL );
730 mc = (metacandidates_t *)data;
733 mc = mi->mi_candidates;
737 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
738 mc->mc_ntargets = mi->mi_ntargets;
739 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
740 if ( op->o_threadctx ) {
744 ldap_pvt_thread_pool_setkey( op->o_threadctx,
745 &meta_back_candidates_dummy, data,
746 meta_back_candidates_keyfree );
749 mi->mi_candidates = mc;
752 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
753 /* NOTE: in the future, may want to allow back-config
754 * to add/remove targets from back-meta... */
755 mc->mc_ntargets = mi->mi_ntargets;
756 mc->mc_candidates = ch_realloc( mc->mc_candidates,
757 sizeof( SlapReply ) * mc->mc_ntargets );
760 return mc->mc_candidates;
766 * Prepares the connection structure
770 * - determine what DN is being requested:
772 * op requires candidate checks
774 * add unique parent of o_req_ndn
775 * bind unique^*[/all] o_req_ndn [no check]
776 * compare unique^+ o_req_ndn
777 * delete unique o_req_ndn
778 * modify unique o_req_ndn
779 * search any o_req_ndn
780 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
782 * - for ops that require the candidate to be unique, in case of multiple
783 * occurrences an internal search with sizeLimit=1 is performed
784 * if a unique candidate can actually be determined. If none is found,
785 * the operation aborts; if multiple are found, the default target
786 * is used if defined and candidate; otherwise the operation aborts.
788 * *^note: actually, the bind operation is handled much like a search;
789 * i.e. the bind is broadcast to all candidate targets.
791 * +^note: actually, the compare operation is handled much like a search;
792 * i.e. the compare is broadcast to all candidate targets, while checking
793 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
801 ldap_back_send_t sendok )
803 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
804 metaconn_t *mc = NULL,
806 int cached = META_TARGET_NONE,
807 i = META_TARGET_NONE,
813 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
817 META_DNTYPE_NEWPARENT
818 } dn_type = META_DNTYPE_ENTRY;
819 struct berval ndn = op->o_req_ndn,
822 SlapReply *candidates = meta_back_candidates_get( op );
824 /* Internal searches are privileged and shared. So is root. */
825 /* FIXME: there seem to be concurrency issues */
826 if ( op->o_do_not_cache || be_isroot( op ) ) {
827 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
828 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
829 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
832 mc_curr.mc_local_ndn = op->o_ndn;
834 /* Explicit binds must not be shared */
835 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
836 mc_curr.mc_conn = op->o_conn;
839 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
843 /* Explicit Bind requests always get their own conn */
844 if ( !( sendok & LDAP_BACK_BINDING ) ) {
845 /* Searches for a metaconn in the avl tree */
847 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
848 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
849 (caddr_t)&mc_curr, meta_back_conndn_cmp );
851 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
852 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
854 /* don't let anyone else use this expired connection */
855 (void)avl_delete( &mi->mi_conninfo.lai_tree,
856 (caddr_t)mc, meta_back_conndnmc_cmp );
857 LDAP_BACK_CONN_TAINTED_SET( mc );
859 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
860 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
863 /* Don't reuse connections while they're still binding */
864 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
865 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
866 ldap_pvt_thread_yield();
872 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
875 switch ( op->o_tag ) {
877 /* if we go to selection, the entry must not exist,
878 * and we must be able to resolve the parent */
879 dn_type = META_DNTYPE_PARENT;
880 dnParent( &ndn, &pndn );
883 case LDAP_REQ_MODRDN:
884 /* if nnewSuperior is not NULL, it must resolve
885 * to the same candidate as the req_ndn */
886 if ( op->orr_nnewSup ) {
887 dn_type = META_DNTYPE_NEWPARENT;
892 /* if bound as rootdn, the backend must bind to all targets
893 * with the administrative identity */
894 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
895 op_type = META_OP_REQUIRE_ALL;
899 case LDAP_REQ_DELETE:
900 case LDAP_REQ_MODIFY:
901 /* just a unique candidate */
904 case LDAP_REQ_COMPARE:
905 case LDAP_REQ_SEARCH:
906 /* allow multiple candidates for the searchBase */
907 op_type = META_OP_ALLOW_MULTIPLE;
911 /* right now, just break (exop?) */
916 * require all connections ...
918 if ( op_type == META_OP_REQUIRE_ALL ) {
920 /* Looks like we didn't get a bind. Open a new session... */
922 mc = metaconn_alloc( op );
923 mc->mc_conn = mc_curr.mc_conn;
924 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
926 if ( sendok & LDAP_BACK_BINDING ) {
927 LDAP_BACK_CONN_BINDING_SET( mc );
931 for ( i = 0; i < mi->mi_ntargets; i++ ) {
932 metatarget_t *mt = mi->mi_targets[ i ];
935 * The target is activated; if needed, it is
938 candidates[ i ].sr_err = meta_back_init_one_conn( op,
940 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
941 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
942 candidates[ i ].sr_tag = META_CANDIDATE;
948 * FIXME: in case one target cannot
949 * be init'd, should the other ones
952 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
953 err = candidates[ i ].sr_err;
958 if ( ncandidates == 0 ) {
960 meta_back_freeconn( op, mc );
963 meta_back_release_conn( op, mc );
966 rs->sr_err = LDAP_NO_SUCH_OBJECT;
967 rs->sr_text = "Unable to select valid candidates";
969 if ( sendok & LDAP_BACK_SENDERR ) {
970 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
971 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
973 send_ldap_result( op, rs );
975 rs->sr_matched = NULL;
985 * looks in cache, if any
987 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
988 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
991 if ( op_type == META_OP_REQUIRE_SINGLE ) {
992 metatarget_t *mt = NULL;
993 metasingleconn_t *msc = NULL;
997 for ( j = 0; j < mi->mi_ntargets; j++ ) {
998 candidates[ j ].sr_tag = META_NOT_CANDIDATE;
1002 * tries to get a unique candidate
1003 * (takes care of default target)
1005 if ( i == META_TARGET_NONE ) {
1006 i = meta_back_get_candidate( op, rs, &ndn );
1008 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1009 i = meta_back_get_candidate( op, rs, &pndn );
1012 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1014 meta_back_release_conn( op, mc );
1017 if ( sendok & LDAP_BACK_SENDERR ) {
1018 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1019 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1021 send_ldap_result( op, rs );
1023 rs->sr_matched = NULL;
1030 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1033 meta_back_release_conn( op, mc );
1036 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1037 rs->sr_text = "cross-target rename not supported";
1038 if ( sendok & LDAP_BACK_SENDERR ) {
1039 send_ldap_result( op, rs );
1046 Debug( LDAP_DEBUG_TRACE,
1047 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1048 i, op->o_req_ndn.bv_val, 0 );
1051 /* Retries searching for a metaconn in the avl tree
1052 * the reason is that the connection might have been
1053 * created by meta_back_get_candidate() */
1054 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1056 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1057 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1058 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1060 /* Don't reuse connections while they're still binding */
1061 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1062 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1063 ldap_pvt_thread_yield();
1069 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1072 /* Looks like we didn't get a bind. Open a new session... */
1074 mc = metaconn_alloc( op );
1075 mc->mc_conn = mc_curr.mc_conn;
1076 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1078 if ( sendok & LDAP_BACK_BINDING ) {
1079 LDAP_BACK_CONN_BINDING_SET( mc );
1085 * Clear all other candidates
1087 ( void )meta_clear_unused_candidates( op, i );
1089 mt = mi->mi_targets[ i ];
1090 msc = &mc->mc_conns[ i ];
1093 * The target is activated; if needed, it is
1094 * also init'd. In case of error, meta_back_init_one_conn
1095 * sends the appropriate result.
1097 err = meta_back_init_one_conn( op, rs, mt, mc, i,
1098 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1099 if ( err != LDAP_SUCCESS ) {
1101 * FIXME: in case one target cannot
1102 * be init'd, should the other ones
1105 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1107 (void)meta_clear_one_candidate( msc );
1108 meta_back_freeconn( op, mc );
1111 meta_back_release_conn( op, mc );
1116 candidates[ i ].sr_err = LDAP_SUCCESS;
1117 candidates[ i ].sr_tag = META_CANDIDATE;
1125 * if no unique candidate ...
1129 /* Looks like we didn't get a bind. Open a new session... */
1131 mc = metaconn_alloc( op );
1132 mc->mc_conn = mc_curr.mc_conn;
1133 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1135 if ( sendok & LDAP_BACK_BINDING ) {
1136 LDAP_BACK_CONN_BINDING_SET( mc );
1140 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1141 metatarget_t *mt = mi->mi_targets[ i ];
1142 metasingleconn_t *msc = &mc->mc_conns[ i ];
1145 || meta_back_is_candidate( &mt->mt_nsuffix,
1147 mt->mt_subtree_exclude,
1149 LDAP_SCOPE_SUBTREE ) )
1153 * The target is activated; if needed, it is
1156 int lerr = meta_back_init_one_conn( op, rs,
1158 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1160 if ( lerr == LDAP_SUCCESS ) {
1161 candidates[ i ].sr_tag = META_CANDIDATE;
1162 candidates[ i ].sr_err = LDAP_SUCCESS;
1165 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1166 op->o_log_prefix, i, 0 );
1171 * FIXME: in case one target cannot
1172 * be init'd, should the other ones
1176 ( void )meta_clear_one_candidate( msc );
1178 /* leave the target candidate, but record the error for later use */
1179 candidates[ i ].sr_err = lerr;
1182 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1183 op->o_log_prefix, i, lerr );
1190 ( void )meta_clear_one_candidate( msc );
1192 candidates[ i ].sr_tag = META_NOT_CANDIDATE;
1196 if ( ncandidates == 0 ) {
1198 meta_back_freeconn( op, mc );
1201 meta_back_release_conn( op, mc );
1204 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1205 rs->sr_text = "Unable to select valid candidates";
1207 if ( sendok & LDAP_BACK_SENDERR ) {
1208 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1209 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1211 send_ldap_result( op, rs );
1213 rs->sr_matched = NULL;
1221 /* clear out meta_back_init_one_conn non-fatal errors */
1222 rs->sr_err = LDAP_SUCCESS;
1225 /* touch the timestamp */
1226 if ( mi->mi_idle_timeout != 0 ) {
1227 mc->mc_time = op->o_time;
1231 if ( mi->mi_conn_ttl ) {
1232 mc->mc_create_time = op->o_time;
1236 * Inserts the newly created metaconn in the avl tree
1238 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1239 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1240 meta_back_conndn_cmp, meta_back_conndn_dup );
1242 #if PRINT_CONNTREE > 0
1243 myprint( mi->mi_conninfo.lai_tree );
1244 #endif /* PRINT_CONNTREE */
1246 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1249 * Err could be -1 in case a duplicate metaconn is inserted
1256 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1257 /* duplicate: free and try to get the newly created one */
1260 LDAP_BACK_CONN_TAINTED_SET( mc );
1264 Debug( LDAP_DEBUG_ANY,
1265 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1266 op->o_log_prefix, ncandidates,
1267 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1269 meta_back_freeconn( op, mc );
1271 rs->sr_err = LDAP_OTHER;
1272 rs->sr_text = "proxy bind collision";
1273 if ( sendok & LDAP_BACK_SENDERR ) {
1274 send_ldap_result( op, rs );
1280 Debug( LDAP_DEBUG_TRACE,
1281 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1282 op->o_log_prefix, ncandidates,
1283 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1286 Debug( LDAP_DEBUG_TRACE,
1287 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1288 op->o_log_prefix, ncandidates,
1289 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1296 meta_back_release_conn_lock(
1301 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1303 assert( mc != NULL );
1306 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1308 assert( mc->mc_refcnt > 0 );
1310 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1311 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1312 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld expired.\n",
1313 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1314 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1315 ( caddr_t )mc, meta_back_conndnmc_cmp );
1316 if ( mc->mc_refcnt == 0 ) {
1317 meta_clear_candidates( op, mc );
1318 meta_back_conn_free( mc );
1322 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );