2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2011 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 * meta_back_conndn_cmp
40 * compares two struct metaconn based on the value of the conn pointer
41 * and of the local DN; used by avl stuff
48 metaconn_t *mc1 = ( metaconn_t * )c1;
49 metaconn_t *mc2 = ( metaconn_t * )c2;
52 /* If local DNs don't match, it is definitely not a match */
53 /* For shared sessions, conn is NULL. Only explicitly
54 * bound sessions will have non-NULL conn.
56 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
58 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
65 * meta_back_conndnmc_cmp
67 * compares two struct metaconn based on the value of the conn pointer,
68 * the local DN and the struct pointer; used by avl stuff
71 meta_back_conndnmc_cmp(
75 metaconn_t *mc1 = ( metaconn_t * )c1;
76 metaconn_t *mc2 = ( metaconn_t * )c2;
79 /* If local DNs don't match, it is definitely not a match */
80 /* For shared sessions, conn is NULL. Only explicitly
81 * bound sessions will have non-NULL conn.
83 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
85 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
87 rc = SLAP_PTRCMP( mc1, mc2 );
97 * compares two struct metaconn based on the value of the conn pointer;
105 metaconn_t *mc1 = ( metaconn_t * )c1;
106 metaconn_t *mc2 = ( metaconn_t * )c2;
108 /* For shared sessions, conn is NULL. Only explicitly
109 * bound sessions will have non-NULL conn.
111 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
115 * meta_back_conndn_dup
117 * returns -1 in case a duplicate struct metaconn has been inserted;
121 meta_back_conndn_dup(
125 metaconn_t *mc1 = ( metaconn_t * )c1;
126 metaconn_t *mc2 = ( metaconn_t * )c2;
128 /* Cannot have more than one shared session with same DN */
129 if ( mc1->mc_conn == mc2->mc_conn &&
130 dn_match( &mc1->mc_local_ndn, &mc2->mc_local_ndn ) )
139 * Debug stuff (got it from libavl)
141 #if META_BACK_PRINT_CONNTREE > 0
143 meta_back_print( metaconn_t *mc, char *avlstr )
147 fputs( "targets=[", stderr );
148 for ( i = 0; i < mc->mc_info->mi_ntargets; i++ ) {
149 fputc( mc->mc_conns[ i ].msc_ld ? '*' : 'o', stderr);
151 fputc( ']', stderr );
153 fprintf( stderr, " mc=%p local=\"%s\" conn=%p refcnt=%d%s %s\n",
155 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
158 LDAP_BACK_CONN_TAINTED( mc ) ? " tainted" : "",
163 meta_back_ravl_print( Avlnode *root, int depth )
171 meta_back_ravl_print( root->avl_right, depth + 1 );
173 for ( i = 0; i < depth; i++ ) {
174 fprintf( stderr, "-" );
176 fputc( ' ', stderr );
178 meta_back_print( (metaconn_t *)root->avl_data,
179 avl_bf2str( root->avl_bf ) );
181 meta_back_ravl_print( root->avl_left, depth + 1 );
184 /* NOTE: duplicate from back-ldap/bind.c */
185 static char* priv2str[] = {
196 meta_back_print_conntree( metainfo_t *mi, char *msg )
200 fprintf( stderr, "========> %s\n", msg );
202 for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
206 fprintf( stderr, " %s[%d]\n", priv2str[ c ], mi->mi_conn_priv[ c ].mic_num );
208 LDAP_TAILQ_FOREACH( mc, &mi->mi_conn_priv[ c ].mic_priv, mc_q )
210 fprintf( stderr, " [%d] ", i );
211 meta_back_print( mc, "" );
216 if ( mi->mi_conninfo.lai_tree == NULL ) {
217 fprintf( stderr, "\t(empty)\n" );
220 meta_back_ravl_print( mi->mi_conninfo.lai_tree, 0 );
223 fprintf( stderr, "<======== %s\n", msg );
225 #endif /* META_BACK_PRINT_CONNTREE */
233 * Allocates a connection structure, making room for all the referenced targets
239 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
241 int ntargets = mi->mi_ntargets;
243 assert( ntargets > 0 );
245 /* malloc all in one */
246 mc = ( metaconn_t * )ch_calloc( 1, sizeof( metaconn_t )
247 + sizeof( metasingleconn_t ) * ( ntargets - 1 ) );
254 mc->mc_authz_target = META_BOUND_NONE;
261 * meta_back_init_one_conn
263 * Initializes one connection
266 meta_back_init_one_conn(
272 ldap_back_send_t sendok,
275 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
276 metatarget_t *mt = mi->mi_targets[ candidate ];
277 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
280 int isauthz = ( candidate == mc->mc_authz_target );
284 int do_start_tls = 0;
285 #endif /* HAVE_TLS */
287 /* if the server is quarantined, and
288 * - the current interval did not expire yet, or
289 * - no more retries should occur,
290 * don't return the connection */
291 if ( mt->mt_isquarantined ) {
292 slap_retry_info_t *ri = &mt->mt_quarantine;
295 if ( mt->mt_quarantine.ri_interval ) {
296 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
297 dont_retry = ( mt->mt_isquarantined > LDAP_BACK_FQ_NO );
299 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
300 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
302 if ( LogTest( LDAP_DEBUG_ANY ) ) {
303 char buf[ SLAP_TEXT_BUFLEN ];
305 snprintf( buf, sizeof( buf ),
306 "meta_back_init_one_conn[%d]: quarantine "
307 "retry block #%d try #%d",
308 candidate, ri->ri_idx, ri->ri_count );
309 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
310 op->o_log_prefix, buf, 0 );
313 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
317 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );
321 rs->sr_err = LDAP_UNAVAILABLE;
322 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
323 rs->sr_text = "Target is quarantined";
324 send_ldap_result( op, rs );
332 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
338 if ( LDAP_BACK_CONN_ISBOUND( msc )
339 || LDAP_BACK_CONN_ISANON( msc ) )
341 assert( msc->msc_ld != NULL );
342 rs->sr_err = LDAP_SUCCESS;
345 } else if ( META_BACK_CONN_CREATING( msc )
346 || LDAP_BACK_CONN_BINDING( msc ) )
348 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
350 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
353 ldap_pvt_thread_yield();
357 /* sounds more appropriate */
358 rs->sr_err = LDAP_BUSY;
359 rs->sr_text = "No connections to target are available";
362 } else if ( META_BACK_CONN_INITED( msc ) ) {
363 assert( msc->msc_ld != NULL );
364 rs->sr_err = LDAP_SUCCESS;
371 META_BACK_CONN_CREATING_SET( msc );
375 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
379 if ( rs->sr_err != LDAP_SUCCESS
381 && ( sendok & LDAP_BACK_SENDERR ) )
383 send_ldap_result( op, rs );
389 assert( msc->msc_ld == NULL );
392 * Attempts to initialize the connection to the target ds
394 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
395 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
397 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
398 #endif /* HAVE_TLS */
399 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
400 if ( rs->sr_err != LDAP_SUCCESS ) {
405 * Set LDAP version. This will always succeed: If the client
406 * bound with a particular version, then so can we.
408 if ( mt->mt_version != 0 ) {
409 version = mt->mt_version;
411 } else if ( op->o_conn->c_protocol != 0 ) {
412 version = op->o_conn->c_protocol;
415 version = LDAP_VERSION3;
417 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
418 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
420 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
421 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
422 META_BACK_TGT_CHASE_REFERRALS( mt ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
426 slap_bindconf *sb = NULL;
429 sb = &mt->mt_idassert.si_bc;
434 if ( sb->sb_tls_do_init ) {
435 bindconf_tls_set( sb, msc->msc_ld );
436 } else if ( sb->sb_tls_ctx ) {
437 ldap_set_option( msc->msc_ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
440 if ( sb == &mt->mt_idassert.si_bc && sb->sb_tls_ctx ) {
443 } else if ( META_BACK_TGT_USE_TLS( mt )
444 || ( op->o_conn->c_is_tls && META_BACK_TGT_PROPAGATE_TLS( mt ) ) )
450 /* start TLS ("tls [try-]{start|propagate}" statement) */
451 if ( do_start_tls ) {
452 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
454 * use asynchronous StartTLS; in case, chase referral
455 * FIXME: OpenLDAP does not return referral on StartTLS yet
459 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
460 if ( rs->sr_err == LDAP_SUCCESS ) {
461 LDAPMessage *res = NULL;
462 int rc, nretries = mt->mt_nretries;
465 LDAP_BACK_TV_SET( &tv );
468 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
471 rs->sr_err = LDAP_OTHER;
475 if ( nretries != 0 ) {
476 if ( nretries > 0 ) {
479 LDAP_BACK_TV_SET( &tv );
482 rs->sr_err = LDAP_OTHER;
486 /* only touch when activity actually took place... */
487 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
488 msc->msc_time = op->o_time;
493 if ( rc == LDAP_RES_EXTENDED ) {
494 struct berval *data = NULL;
496 /* NOTE: right now, data is unused, so don't get it */
497 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
498 res, NULL, NULL /* &data */ , 0 );
499 if ( rs->sr_err == LDAP_SUCCESS ) {
502 /* FIXME: matched? referrals? response controls? */
503 rs->sr_err = ldap_parse_result( msc->msc_ld,
504 res, &err, NULL, NULL, NULL, NULL, 1 );
507 if ( rs->sr_err == LDAP_SUCCESS ) {
510 rs->sr_err = slap_map_api2result( rs );
512 /* FIXME: in case a referral
513 * is returned, should we try
514 * using it instead of the
516 if ( rs->sr_err == LDAP_SUCCESS ) {
517 ldap_install_tls( msc->msc_ld );
519 } else if ( rs->sr_err == LDAP_REFERRAL ) {
520 /* FIXME: LDAP_OPERATIONS_ERROR? */
521 rs->sr_err = LDAP_OTHER;
522 rs->sr_text = "Unwilling to chase referral "
523 "returned by Start TLS exop";
532 rs->sr_err = LDAP_OTHER;
539 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
541 * use synchronous StartTLS
543 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
544 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
546 /* if StartTLS is requested, only attempt it if the URL
547 * is not "ldaps://"; this may occur not only in case
548 * of misconfiguration, but also when used in the chain
549 * overlay, where the "uri" can be parsed out of a referral */
550 if ( rs->sr_err == LDAP_SERVER_DOWN
551 || ( rs->sr_err != LDAP_SUCCESS
552 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
556 Debug( LDAP_DEBUG_ANY,
557 "### %s meta_back_init_one_conn(TLS) "
558 "ldap_unbind_ext[%d] ld=%p\n",
559 op->o_log_prefix, candidate,
560 (void *)msc->msc_ld );
561 #endif /* DEBUG_205 */
563 /* need to trash a failed Start TLS */
564 meta_clear_one_candidate( op, mc, candidate );
568 #endif /* HAVE_TLS */
571 * Set the network timeout if set
573 if ( mt->mt_network_timeout != 0 ) {
574 struct timeval network_timeout;
576 network_timeout.tv_usec = 0;
577 network_timeout.tv_sec = mt->mt_network_timeout;
579 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
580 (void *)&network_timeout );
584 * If the connection DN is not null, an attempt to rewrite it is made
588 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
589 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
590 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
591 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
592 memset( msc->msc_cred.bv_val, 0,
593 msc->msc_cred.bv_len );
595 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
597 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
600 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
604 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
605 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
606 ber_memfree_x( msc->msc_cred.bv_val, NULL );
607 BER_BVZERO( &msc->msc_cred );
609 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
610 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
611 BER_BVZERO( &msc->msc_bound_ndn );
613 if ( !BER_BVISEMPTY( &op->o_ndn )
614 && SLAP_IS_AUTHZ_BACKEND( op )
618 dc.conn = op->o_conn;
623 * Rewrite the bind dn if needed
625 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
626 &msc->msc_bound_ndn ) )
630 Debug( LDAP_DEBUG_ANY,
631 "### %s meta_back_init_one_conn(rewrite) "
632 "ldap_unbind_ext[%d] ld=%p\n",
633 op->o_log_prefix, candidate,
634 (void *)msc->msc_ld );
635 #endif /* DEBUG_205 */
637 /* need to trash a connection not fully established */
638 meta_clear_one_candidate( op, mc, candidate );
642 /* copy the DN if needed */
643 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
644 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
647 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
650 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
654 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
658 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
660 META_BACK_CONN_CREATING_CLEAR( msc );
661 if ( rs->sr_err == LDAP_SUCCESS ) {
663 * Sets a cookie for the rewrite session
665 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
666 META_BACK_CONN_INITED_SET( msc );
669 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
672 if ( rs->sr_err != LDAP_SUCCESS ) {
673 rs->sr_err = slap_map_api2result( rs );
674 if ( sendok & LDAP_BACK_SENDERR ) {
675 send_ldap_result( op, rs );
685 * Retries one connection
693 ldap_back_send_t sendok )
695 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
696 metatarget_t *mt = mi->mi_targets[ candidate ];
697 metaconn_t *mc = *mcp;
698 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
699 int rc = LDAP_UNAVAILABLE,
703 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
705 assert( !META_BACK_CONN_CREATING( msc ) );
706 binding = LDAP_BACK_CONN_BINDING( msc );
707 LDAP_BACK_CONN_BINDING_CLEAR( msc );
709 assert( mc->mc_refcnt > 0 );
710 if ( mc->mc_refcnt == 1 ) {
711 struct berval save_cred;
713 if ( LogTest( LDAP_DEBUG_ANY ) ) {
714 char buf[ SLAP_TEXT_BUFLEN ];
716 /* this lock is required; however,
717 * it's invoked only when logging is on */
718 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
719 snprintf( buf, sizeof( buf ),
720 "retrying URI=\"%s\" DN=\"%s\"",
722 BER_BVISNULL( &msc->msc_bound_ndn ) ?
723 "" : msc->msc_bound_ndn.bv_val );
724 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
726 Debug( LDAP_DEBUG_ANY,
727 "%s meta_back_retry[%d]: %s.\n",
728 op->o_log_prefix, candidate, buf );
731 /* save credentials, if any, for later use;
732 * meta_clear_one_candidate() would free them */
733 save_cred = msc->msc_cred;
734 BER_BVZERO( &msc->msc_cred );
736 meta_clear_one_candidate( op, mc, candidate );
737 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
739 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
741 /* mc here must be the regular mc, reset and ready for init */
742 rc = meta_back_init_one_conn( op, rs, mc, candidate,
743 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
745 /* restore credentials, if any and if needed;
746 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
747 * if no msc_bound_ndn is restored, destroy credentials */
748 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
749 && BER_BVISNULL( &msc->msc_cred ) )
751 msc->msc_cred = save_cred;
753 } else if ( !BER_BVISNULL( &save_cred ) ) {
754 memset( save_cred.bv_val, 0, save_cred.bv_len );
755 ber_memfree_x( save_cred.bv_val, NULL );
758 /* restore the "binding" flag, in case */
760 LDAP_BACK_CONN_BINDING_SET( msc );
763 if ( rc == LDAP_SUCCESS ) {
765 rc = meta_back_single_dobind( op, rs, mcp, candidate,
766 sendok, mt->mt_nretries, 0 );
768 Debug( LDAP_DEBUG_ANY,
769 "%s meta_back_retry[%d]: "
770 "meta_back_single_dobind=%d\n",
771 op->o_log_prefix, candidate, rc );
772 if ( rc == LDAP_SUCCESS ) {
773 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
774 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
776 LDAP_BACK_CONN_ISBOUND_SET( msc );
779 LDAP_BACK_CONN_ISANON_SET( msc );
782 /* when bound, dispose of the "binding" flag */
784 LDAP_BACK_CONN_BINDING_CLEAR( msc );
789 /* don't send twice */
790 sendok &= ~LDAP_BACK_SENDERR;
793 if ( rc != LDAP_SUCCESS ) {
794 SlapReply *candidates = meta_back_candidates_get( op );
796 candidates[ candidate ].sr_err = rc;
798 if ( *mcp != NULL ) {
799 if ( mc->mc_refcnt == 1 ) {
801 LDAP_BACK_CONN_BINDING_CLEAR( msc );
803 (void)meta_clear_one_candidate( op, mc, candidate );
806 LDAP_BACK_CONN_TAINTED_SET( mc );
807 /* only release if mandatory; otherwise
808 * let the caller do what's best before
810 if ( META_BACK_ONERR_STOP( mi ) ) {
811 meta_back_release_conn_lock( mi, mc, 0 );
815 #if META_BACK_PRINT_CONNTREE > 0
816 meta_back_print_conntree( mi, ">>> meta_back_retry" );
817 #endif /* META_BACK_PRINT_CONNTREE */
819 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
820 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
821 if ( mc->mc_q.tqe_prev != NULL ) {
822 assert( LDAP_BACK_CONN_CACHED( mc ) );
823 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
824 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
826 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
827 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
830 assert( !LDAP_BACK_CONN_CACHED( mc ) );
834 /* FIXME: check if in tree, for consistency? */
835 (void)avl_delete( &mi->mi_conninfo.lai_tree,
836 ( caddr_t )mc, meta_back_conndnmc_cmp );
838 LDAP_BACK_CONN_CACHED_CLEAR( mc );
840 #if META_BACK_PRINT_CONNTREE > 0
841 meta_back_print_conntree( mi, "<<< meta_back_retry" );
842 #endif /* META_BACK_PRINT_CONNTREE */
846 if ( sendok & LDAP_BACK_SENDERR ) {
848 rs->sr_text = "Unable to retry";
849 send_ldap_result( op, rs );
853 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
854 meta_back_quarantine( op, rs, candidate );
857 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
859 return rc == LDAP_SUCCESS ? 1 : 0;
863 * callback for unique candidate selection
866 meta_back_conn_cb( Operation *op, SlapReply *rs )
868 assert( op->o_tag == LDAP_REQ_SEARCH );
870 switch ( rs->sr_type ) {
872 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
888 meta_back_get_candidate(
893 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
897 * tries to get a unique candidate
898 * (takes care of default target)
900 candidate = meta_back_select_unique_candidate( mi, ndn );
903 * if any is found, inits the connection
905 if ( candidate == META_TARGET_NONE ) {
906 rs->sr_err = LDAP_NO_SUCH_OBJECT;
907 rs->sr_text = "No suitable candidate target found";
909 } else if ( candidate == META_TARGET_MULTIPLE ) {
911 SlapReply rs2 = { REP_RESULT };
912 slap_callback cb2 = { 0 };
915 /* try to get a unique match for the request ndn
916 * among the multiple candidates available */
917 op2.o_tag = LDAP_REQ_SEARCH;
919 op2.o_req_ndn = *ndn;
920 op2.ors_scope = LDAP_SCOPE_BASE;
921 op2.ors_deref = LDAP_DEREF_NEVER;
922 op2.ors_attrs = slap_anlist_no_attrs;
923 op2.ors_attrsonly = 0;
924 op2.ors_limit = NULL;
926 op2.ors_tlimit = SLAP_NO_LIMIT;
928 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
929 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
931 op2.o_callback = &cb2;
932 cb2.sc_response = meta_back_conn_cb;
933 cb2.sc_private = (void *)&candidate;
935 rc = op->o_bd->be_search( &op2, &rs2 );
937 switch ( rs2.sr_err ) {
940 rs->sr_err = rs2.sr_err;
943 case LDAP_SIZELIMIT_EXCEEDED:
944 /* if multiple candidates can serve the operation,
945 * and a default target is defined, and it is
946 * a candidate, try using it (FIXME: YMMV) */
947 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
948 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
949 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
951 candidate = mi->mi_defaulttarget;
952 rs->sr_err = LDAP_SUCCESS;
956 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
957 rs->sr_text = "Unable to select unique candidate target";
963 rs->sr_err = LDAP_SUCCESS;
969 static void *meta_back_candidates_dummy;
972 meta_back_candidates_keyfree(
976 metacandidates_t *mc = (metacandidates_t *)data;
978 ber_memfree_x( mc->mc_candidates, NULL );
979 ber_memfree_x( data, NULL );
983 meta_back_candidates_get( Operation *op )
985 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
986 metacandidates_t *mc;
988 if ( op->o_threadctx ) {
991 ldap_pvt_thread_pool_getkey( op->o_threadctx,
992 &meta_back_candidates_dummy, &data, NULL );
993 mc = (metacandidates_t *)data;
996 mc = mi->mi_candidates;
1000 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1001 mc->mc_ntargets = mi->mi_ntargets;
1002 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1003 if ( op->o_threadctx ) {
1007 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1008 &meta_back_candidates_dummy, data,
1009 meta_back_candidates_keyfree,
1013 mi->mi_candidates = mc;
1016 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1017 /* NOTE: in the future, may want to allow back-config
1018 * to add/remove targets from back-meta... */
1019 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1020 sizeof( SlapReply ) * mi->mi_ntargets );
1021 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1022 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1023 mc->mc_ntargets = mi->mi_ntargets;
1026 return mc->mc_candidates;
1032 * Prepares the connection structure
1036 * - determine what DN is being requested:
1038 * op requires candidate checks
1040 * add unique parent of o_req_ndn
1041 * bind unique^*[/all] o_req_ndn [no check]
1042 * compare unique^+ o_req_ndn
1043 * delete unique o_req_ndn
1044 * modify unique o_req_ndn
1045 * search any o_req_ndn
1046 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1048 * - for ops that require the candidate to be unique, in case of multiple
1049 * occurrences an internal search with sizeLimit=1 is performed
1050 * if a unique candidate can actually be determined. If none is found,
1051 * the operation aborts; if multiple are found, the default target
1052 * is used if defined and candidate; otherwise the operation aborts.
1054 * *^note: actually, the bind operation is handled much like a search;
1055 * i.e. the bind is broadcast to all candidate targets.
1057 * +^note: actually, the compare operation is handled much like a search;
1058 * i.e. the compare is broadcast to all candidate targets, while checking
1059 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1067 ldap_back_send_t sendok )
1069 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1070 metaconn_t *mc = NULL,
1072 int cached = META_TARGET_NONE,
1073 i = META_TARGET_NONE,
1079 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1083 META_DNTYPE_NEWPARENT
1084 } dn_type = META_DNTYPE_ENTRY;
1085 struct berval ndn = op->o_req_ndn,
1088 SlapReply *candidates = meta_back_candidates_get( op );
1090 /* Internal searches are privileged and shared. So is root. */
1091 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1092 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1093 || op->o_do_not_cache || be_isroot( op ) )
1095 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1096 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1097 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1099 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1101 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1102 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1103 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1106 mc_curr.mc_local_ndn = op->o_ndn;
1108 /* Explicit binds must not be shared */
1109 if ( !BER_BVISEMPTY( &op->o_ndn )
1110 || op->o_tag == LDAP_REQ_BIND
1111 || SLAP_IS_AUTHZ_BACKEND( op ) )
1113 mc_curr.mc_conn = op->o_conn;
1116 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1117 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1121 /* Explicit Bind requests always get their own conn */
1122 if ( sendok & LDAP_BACK_BINDING ) {
1123 mc_curr.mc_conn = op->o_conn;
1126 /* Searches for a metaconn in the avl tree */
1128 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1129 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1130 /* lookup a conn that's not binding */
1131 LDAP_TAILQ_FOREACH( mc,
1132 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1135 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1141 /* move to tail of queue */
1142 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1143 metaconn_t, mc_q ) )
1145 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1147 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1148 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1152 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1153 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1155 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1160 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1161 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1165 /* catch taint errors */
1166 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1168 /* Don't reuse connections while they're still binding
1169 * NOTE: only makes sense for binds */
1170 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1171 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1172 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1174 ldap_pvt_thread_yield();
1178 /* release conn, and create a temporary */
1182 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1183 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
1185 #if META_BACK_PRINT_CONNTREE > 0
1186 meta_back_print_conntree( mi,
1187 ">>> meta_back_getconn(expired)" );
1188 #endif /* META_BACK_PRINT_CONNTREE */
1190 /* don't let anyone else use this expired connection */
1191 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1192 if ( mc->mc_q.tqe_prev != NULL ) {
1193 assert( LDAP_BACK_CONN_CACHED( mc ) );
1194 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1195 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1197 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1198 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1201 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1205 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1206 (caddr_t)mc, meta_back_conndnmc_cmp );
1209 #if META_BACK_PRINT_CONNTREE > 0
1210 meta_back_print_conntree( mi,
1211 "<<< meta_back_getconn(expired)" );
1212 #endif /* META_BACK_PRINT_CONNTREE */
1213 LDAP_BACK_CONN_TAINTED_SET( mc );
1214 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1216 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1217 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1218 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1220 Debug( LDAP_DEBUG_TRACE,
1221 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1222 op->o_log_prefix, (void *)mc, buf );
1229 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1232 switch ( op->o_tag ) {
1234 /* if we go to selection, the entry must not exist,
1235 * and we must be able to resolve the parent */
1236 dn_type = META_DNTYPE_PARENT;
1237 dnParent( &ndn, &pndn );
1240 case LDAP_REQ_MODRDN:
1241 /* if nnewSuperior is not NULL, it must resolve
1242 * to the same candidate as the req_ndn */
1243 if ( op->orr_nnewSup ) {
1244 dn_type = META_DNTYPE_NEWPARENT;
1249 /* if bound as rootdn, the backend must bind to all targets
1250 * with the administrative identity
1251 * (unless pseoudoroot-bind-defer is TRUE) */
1252 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1253 op_type = META_OP_REQUIRE_ALL;
1257 case LDAP_REQ_COMPARE:
1258 case LDAP_REQ_DELETE:
1259 case LDAP_REQ_MODIFY:
1260 /* just a unique candidate */
1263 case LDAP_REQ_SEARCH:
1264 /* allow multiple candidates for the searchBase */
1265 op_type = META_OP_ALLOW_MULTIPLE;
1269 /* right now, just break (exop?) */
1274 * require all connections ...
1276 if ( op_type == META_OP_REQUIRE_ALL ) {
1278 /* Looks like we didn't get a bind. Open a new session... */
1280 assert( new_conn == 0 );
1281 mc = metaconn_alloc( op );
1282 mc->mc_conn = mc_curr.mc_conn;
1283 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1285 if ( sendok & LDAP_BACK_BINDING ) {
1286 LDAP_BACK_CONN_BINDING_SET( mc );
1288 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1289 LDAP_BACK_CONN_ISPRIV_SET( mc );
1291 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1292 LDAP_BACK_CONN_ISANON_SET( mc );
1296 /* TODO: if any of the connections is binding,
1297 * release mc and create a new one */
1300 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1302 * The target is activated; if needed, it is
1305 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1306 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1307 LDAP_BACK_DONTSEND, !new_conn );
1308 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1309 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1310 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1312 META_CANDIDATE_SET( &candidates[ i ] );
1318 * FIXME: in case one target cannot
1319 * be init'd, should the other ones
1322 META_CANDIDATE_RESET( &candidates[ i ] );
1323 err = candidates[ i ].sr_err;
1328 if ( ncandidates == 0 ) {
1331 meta_back_conn_free( mc );
1334 meta_back_release_conn( mi, mc );
1337 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1338 rs->sr_text = "Unable to select valid candidates";
1340 if ( sendok & LDAP_BACK_SENDERR ) {
1341 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1342 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1344 send_ldap_result( op, rs );
1345 rs->sr_matched = NULL;
1355 * looks in cache, if any
1357 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1358 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1361 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1362 metatarget_t *mt = NULL;
1363 metasingleconn_t *msc = NULL;
1367 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1368 META_CANDIDATE_RESET( &candidates[ j ] );
1372 * tries to get a unique candidate
1373 * (takes care of default target)
1375 if ( i == META_TARGET_NONE ) {
1376 i = meta_back_get_candidate( op, rs, &ndn );
1378 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1379 i = meta_back_get_candidate( op, rs, &pndn );
1382 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1384 meta_back_release_conn( mi, mc );
1387 if ( sendok & LDAP_BACK_SENDERR ) {
1388 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1389 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1391 send_ldap_result( op, rs );
1392 rs->sr_matched = NULL;
1399 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1402 meta_back_release_conn( mi, mc );
1405 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1406 rs->sr_text = "Cross-target rename not supported";
1407 if ( sendok & LDAP_BACK_SENDERR ) {
1408 send_ldap_result( op, rs );
1414 Debug( LDAP_DEBUG_TRACE,
1415 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1416 i, op->o_req_ndn.bv_val, 0 );
1419 /* Retries searching for a metaconn in the avl tree
1420 * the reason is that the connection might have been
1421 * created by meta_back_get_candidate() */
1422 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1424 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1425 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1426 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1428 /* catch taint errors */
1429 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1431 /* Don't reuse connections while they're still binding */
1432 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1433 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1435 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1436 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1437 ldap_pvt_thread_yield();
1447 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1450 /* Looks like we didn't get a bind. Open a new session... */
1452 assert( new_conn == 0 );
1453 mc = metaconn_alloc( op );
1454 mc->mc_conn = mc_curr.mc_conn;
1455 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1457 if ( sendok & LDAP_BACK_BINDING ) {
1458 LDAP_BACK_CONN_BINDING_SET( mc );
1460 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1461 LDAP_BACK_CONN_ISPRIV_SET( mc );
1463 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1464 LDAP_BACK_CONN_ISANON_SET( mc );
1470 * Clear all other candidates
1472 ( void )meta_clear_unused_candidates( op, i );
1474 mt = mi->mi_targets[ i ];
1475 msc = &mc->mc_conns[ i ];
1478 * The target is activated; if needed, it is
1479 * also init'd. In case of error, meta_back_init_one_conn
1480 * sends the appropriate result.
1482 err = meta_back_init_one_conn( op, rs, mc, i,
1483 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1484 if ( err != LDAP_SUCCESS ) {
1486 * FIXME: in case one target cannot
1487 * be init'd, should the other ones
1490 META_CANDIDATE_RESET( &candidates[ i ] );
1493 meta_back_conn_free( mc );
1496 meta_back_release_conn( mi, mc );
1501 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1502 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1505 candidates[ i ].sr_err = LDAP_SUCCESS;
1506 META_CANDIDATE_SET( &candidates[ i ] );
1514 * if no unique candidate ...
1518 /* Looks like we didn't get a bind. Open a new session... */
1520 assert( new_conn == 0 );
1521 mc = metaconn_alloc( op );
1522 mc->mc_conn = mc_curr.mc_conn;
1523 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1525 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1526 LDAP_BACK_CONN_ISPRIV_SET( mc );
1528 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1529 LDAP_BACK_CONN_ISANON_SET( mc );
1533 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1534 metatarget_t *mt = mi->mi_targets[ i ];
1536 META_CANDIDATE_RESET( &candidates[ i ] );
1539 || meta_back_is_candidate( mt, &op->o_req_ndn,
1540 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1544 * The target is activated; if needed, it is
1547 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1548 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1549 LDAP_BACK_DONTSEND, !new_conn );
1550 candidates[ i ].sr_err = lerr;
1551 if ( lerr == LDAP_SUCCESS ) {
1552 META_CANDIDATE_SET( &candidates[ i ] );
1555 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1556 op->o_log_prefix, i, 0 );
1558 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1559 META_CANDIDATE_SET( &candidates[ i ] );
1561 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1562 op->o_log_prefix, i,
1563 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1568 * FIXME: in case one target cannot
1569 * be init'd, should the other ones
1573 ( void )meta_clear_one_candidate( op, mc, i );
1575 /* leave the target candidate, but record the error for later use */
1578 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1579 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1580 op->o_log_prefix, i, lerr );
1583 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1584 op->o_log_prefix, i, lerr );
1587 if ( META_BACK_ONERR_STOP( mi ) ) {
1588 if ( sendok & LDAP_BACK_SENDERR ) {
1589 send_ldap_result( op, rs );
1593 meta_back_conn_free( mc );
1596 meta_back_release_conn( mi, mc );
1607 ( void )meta_clear_one_candidate( op, mc, i );
1612 if ( ncandidates == 0 ) {
1615 meta_back_conn_free( mc );
1618 meta_back_release_conn( mi, mc );
1621 if ( rs->sr_err == LDAP_SUCCESS ) {
1622 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1623 rs->sr_text = "Unable to select valid candidates";
1626 if ( sendok & LDAP_BACK_SENDERR ) {
1627 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1628 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1630 send_ldap_result( op, rs );
1631 rs->sr_matched = NULL;
1639 /* clear out meta_back_init_one_conn non-fatal errors */
1640 rs->sr_err = LDAP_SUCCESS;
1643 /* touch the timestamp */
1644 if ( mi->mi_idle_timeout != 0 ) {
1645 mc->mc_time = op->o_time;
1649 if ( mi->mi_conn_ttl ) {
1650 mc->mc_create_time = op->o_time;
1654 * Inserts the newly created metaconn in the avl tree
1656 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1657 #if META_BACK_PRINT_CONNTREE > 0
1658 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1659 #endif /* META_BACK_PRINT_CONNTREE */
1662 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1663 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1664 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1665 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1666 LDAP_BACK_CONN_CACHED_SET( mc );
1669 LDAP_BACK_CONN_TAINTED_SET( mc );
1673 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1674 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1675 meta_back_conndn_cmp, meta_back_conndn_dup );
1676 LDAP_BACK_CONN_CACHED_SET( mc );
1679 #if META_BACK_PRINT_CONNTREE > 0
1680 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1681 #endif /* META_BACK_PRINT_CONNTREE */
1682 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1684 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1686 * Err could be -1 in case a duplicate metaconn is inserted
1693 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1694 /* duplicate: free and try to get the newly created one */
1695 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1697 meta_back_conn_free( mc );
1703 LDAP_BACK_CONN_TAINTED_SET( mc );
1707 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1708 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1709 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1710 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1712 Debug( LDAP_DEBUG_ANY,
1713 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1714 op->o_log_prefix, ncandidates, buf );
1718 meta_back_conn_free( mc );
1720 rs->sr_err = LDAP_OTHER;
1721 rs->sr_text = "Proxy bind collision";
1722 if ( sendok & LDAP_BACK_SENDERR ) {
1723 send_ldap_result( op, rs );
1729 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1730 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1731 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1733 Debug( LDAP_DEBUG_TRACE,
1734 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1735 op->o_log_prefix, ncandidates, buf );
1739 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1740 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1741 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1743 Debug( LDAP_DEBUG_TRACE,
1744 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1745 op->o_log_prefix, ncandidates, buf );
1753 meta_back_release_conn_lock(
1758 assert( mc != NULL );
1761 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1763 assert( mc->mc_refcnt > 0 );
1765 /* NOTE: the connection is removed if either it is tainted
1766 * or if it is shared and no one else is using it. This needs
1767 * to occur because for intrinsic reasons cached connections
1768 * that are not privileged would live forever and pollute
1769 * the connection space (and eat up resources). Maybe this
1770 * should be configurable... */
1771 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1772 #if META_BACK_PRINT_CONNTREE > 0
1773 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1774 #endif /* META_BACK_PRINT_CONNTREE */
1776 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1777 if ( mc->mc_q.tqe_prev != NULL ) {
1778 assert( LDAP_BACK_CONN_CACHED( mc ) );
1779 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1780 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1781 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1782 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1785 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1788 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1791 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1792 ( caddr_t )mc, meta_back_conndnmc_cmp );
1794 /* Overparanoid, but useful... */
1795 assert( tmpmc == NULL || tmpmc == mc );
1798 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1800 #if META_BACK_PRINT_CONNTREE > 0
1801 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1802 #endif /* META_BACK_PRINT_CONNTREE */
1804 if ( mc->mc_refcnt == 0 ) {
1805 meta_back_conn_free( mc );
1810 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1811 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1815 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1820 meta_back_quarantine(
1825 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1826 metatarget_t *mt = mi->mi_targets[ candidate ];
1828 slap_retry_info_t *ri = &mt->mt_quarantine;
1830 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1832 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1833 time_t new_last = slap_get_time();
1835 switch ( mt->mt_isquarantined ) {
1836 case LDAP_BACK_FQ_NO:
1837 if ( ri->ri_last == new_last ) {
1841 Debug( LDAP_DEBUG_ANY,
1842 "%s meta_back_quarantine[%d]: enter.\n",
1843 op->o_log_prefix, candidate, 0 );
1849 case LDAP_BACK_FQ_RETRYING:
1850 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1851 char buf[ SLAP_TEXT_BUFLEN ];
1853 snprintf( buf, sizeof( buf ),
1854 "meta_back_quarantine[%d]: block #%d try #%d failed",
1855 candidate, ri->ri_idx, ri->ri_count );
1856 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1857 op->o_log_prefix, buf, 0 );
1861 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1862 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1873 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1874 ri->ri_last = new_last;
1876 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1877 Debug( LDAP_DEBUG_ANY,
1878 "%s meta_back_quarantine[%d]: exit.\n",
1879 op->o_log_prefix, candidate, 0 );
1881 if ( mi->mi_quarantine_f ) {
1882 (void)mi->mi_quarantine_f( mi, candidate,
1883 mi->mi_quarantine_p );
1888 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1892 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );