2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2013 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 LDAP_BACK_CONN_BINDING_SET( msc ); binding = 1;
766 rc = meta_back_single_dobind( op, rs, mcp, candidate,
767 sendok, mt->mt_nretries, 0 );
769 Debug( LDAP_DEBUG_ANY,
770 "%s meta_back_retry[%d]: "
771 "meta_back_single_dobind=%d\n",
772 op->o_log_prefix, candidate, rc );
773 if ( rc == LDAP_SUCCESS ) {
774 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
775 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
777 LDAP_BACK_CONN_ISBOUND_SET( msc );
780 LDAP_BACK_CONN_ISANON_SET( msc );
783 /* when bound, dispose of the "binding" flag */
785 LDAP_BACK_CONN_BINDING_CLEAR( msc );
790 /* don't send twice */
791 sendok &= ~LDAP_BACK_SENDERR;
794 if ( rc != LDAP_SUCCESS ) {
795 SlapReply *candidates = meta_back_candidates_get( op );
797 candidates[ candidate ].sr_err = rc;
799 if ( *mcp != NULL ) {
800 if ( mc->mc_refcnt == 1 ) {
802 LDAP_BACK_CONN_BINDING_CLEAR( msc );
804 (void)meta_clear_one_candidate( op, mc, candidate );
807 LDAP_BACK_CONN_TAINTED_SET( mc );
808 /* only release if mandatory; otherwise
809 * let the caller do what's best before
811 if ( META_BACK_ONERR_STOP( mi ) ) {
812 meta_back_release_conn_lock( mi, mc, 0 );
816 #if META_BACK_PRINT_CONNTREE > 0
817 meta_back_print_conntree( mi, ">>> meta_back_retry" );
818 #endif /* META_BACK_PRINT_CONNTREE */
820 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
821 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
822 if ( mc->mc_q.tqe_prev != NULL ) {
823 assert( LDAP_BACK_CONN_CACHED( mc ) );
824 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
825 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
827 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
828 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
831 assert( !LDAP_BACK_CONN_CACHED( mc ) );
835 /* FIXME: check if in tree, for consistency? */
836 (void)avl_delete( &mi->mi_conninfo.lai_tree,
837 ( caddr_t )mc, meta_back_conndnmc_cmp );
839 LDAP_BACK_CONN_CACHED_CLEAR( mc );
841 #if META_BACK_PRINT_CONNTREE > 0
842 meta_back_print_conntree( mi, "<<< meta_back_retry" );
843 #endif /* META_BACK_PRINT_CONNTREE */
847 if ( sendok & LDAP_BACK_SENDERR ) {
849 rs->sr_text = "Unable to retry";
850 send_ldap_result( op, rs );
854 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
855 meta_back_quarantine( op, rs, candidate );
858 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
860 return rc == LDAP_SUCCESS ? 1 : 0;
864 * callback for unique candidate selection
867 meta_back_conn_cb( Operation *op, SlapReply *rs )
869 assert( op->o_tag == LDAP_REQ_SEARCH );
871 switch ( rs->sr_type ) {
873 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
889 meta_back_get_candidate(
894 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
898 * tries to get a unique candidate
899 * (takes care of default target)
901 candidate = meta_back_select_unique_candidate( mi, ndn );
904 * if any is found, inits the connection
906 if ( candidate == META_TARGET_NONE ) {
907 rs->sr_err = LDAP_NO_SUCH_OBJECT;
908 rs->sr_text = "No suitable candidate target found";
910 } else if ( candidate == META_TARGET_MULTIPLE ) {
912 SlapReply rs2 = { REP_RESULT };
913 slap_callback cb2 = { 0 };
916 /* try to get a unique match for the request ndn
917 * among the multiple candidates available */
918 op2.o_tag = LDAP_REQ_SEARCH;
920 op2.o_req_ndn = *ndn;
921 op2.ors_scope = LDAP_SCOPE_BASE;
922 op2.ors_deref = LDAP_DEREF_NEVER;
923 op2.ors_attrs = slap_anlist_no_attrs;
924 op2.ors_attrsonly = 0;
925 op2.ors_limit = NULL;
927 op2.ors_tlimit = SLAP_NO_LIMIT;
929 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
930 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
932 op2.o_callback = &cb2;
933 cb2.sc_response = meta_back_conn_cb;
934 cb2.sc_private = (void *)&candidate;
936 rc = op->o_bd->be_search( &op2, &rs2 );
938 switch ( rs2.sr_err ) {
941 rs->sr_err = rs2.sr_err;
944 case LDAP_SIZELIMIT_EXCEEDED:
945 /* if multiple candidates can serve the operation,
946 * and a default target is defined, and it is
947 * a candidate, try using it (FIXME: YMMV) */
948 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
949 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
950 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
952 candidate = mi->mi_defaulttarget;
953 rs->sr_err = LDAP_SUCCESS;
957 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
958 rs->sr_text = "Unable to select unique candidate target";
964 rs->sr_err = LDAP_SUCCESS;
970 static void *meta_back_candidates_dummy;
973 meta_back_candidates_keyfree(
977 metacandidates_t *mc = (metacandidates_t *)data;
979 ber_memfree_x( mc->mc_candidates, NULL );
980 ber_memfree_x( data, NULL );
984 meta_back_candidates_get( Operation *op )
986 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
987 metacandidates_t *mc;
989 if ( op->o_threadctx ) {
992 ldap_pvt_thread_pool_getkey( op->o_threadctx,
993 &meta_back_candidates_dummy, &data, NULL );
994 mc = (metacandidates_t *)data;
997 mc = mi->mi_candidates;
1001 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1002 mc->mc_ntargets = mi->mi_ntargets;
1003 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1004 if ( op->o_threadctx ) {
1008 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1009 &meta_back_candidates_dummy, data,
1010 meta_back_candidates_keyfree,
1014 mi->mi_candidates = mc;
1017 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1018 /* NOTE: in the future, may want to allow back-config
1019 * to add/remove targets from back-meta... */
1020 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1021 sizeof( SlapReply ) * mi->mi_ntargets );
1022 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1023 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1024 mc->mc_ntargets = mi->mi_ntargets;
1027 return mc->mc_candidates;
1033 * Prepares the connection structure
1037 * - determine what DN is being requested:
1039 * op requires candidate checks
1041 * add unique parent of o_req_ndn
1042 * bind unique^*[/all] o_req_ndn [no check]
1043 * compare unique^+ o_req_ndn
1044 * delete unique o_req_ndn
1045 * modify unique o_req_ndn
1046 * search any o_req_ndn
1047 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1049 * - for ops that require the candidate to be unique, in case of multiple
1050 * occurrences an internal search with sizeLimit=1 is performed
1051 * if a unique candidate can actually be determined. If none is found,
1052 * the operation aborts; if multiple are found, the default target
1053 * is used if defined and candidate; otherwise the operation aborts.
1055 * *^note: actually, the bind operation is handled much like a search;
1056 * i.e. the bind is broadcast to all candidate targets.
1058 * +^note: actually, the compare operation is handled much like a search;
1059 * i.e. the compare is broadcast to all candidate targets, while checking
1060 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1068 ldap_back_send_t sendok )
1070 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1071 metaconn_t *mc = NULL,
1073 int cached = META_TARGET_NONE,
1074 i = META_TARGET_NONE,
1080 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1084 META_DNTYPE_NEWPARENT
1085 } dn_type = META_DNTYPE_ENTRY;
1086 struct berval ndn = op->o_req_ndn,
1089 SlapReply *candidates = meta_back_candidates_get( op );
1091 /* Internal searches are privileged and shared. So is root. */
1092 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1093 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1094 || op->o_do_not_cache || be_isroot( op ) )
1096 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1097 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1098 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1100 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1102 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1103 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1104 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1107 mc_curr.mc_local_ndn = op->o_ndn;
1109 /* Explicit binds must not be shared */
1110 if ( !BER_BVISEMPTY( &op->o_ndn )
1111 || op->o_tag == LDAP_REQ_BIND
1112 || SLAP_IS_AUTHZ_BACKEND( op ) )
1114 mc_curr.mc_conn = op->o_conn;
1117 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1118 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1122 /* Explicit Bind requests always get their own conn */
1123 if ( sendok & LDAP_BACK_BINDING ) {
1124 mc_curr.mc_conn = op->o_conn;
1127 /* Searches for a metaconn in the avl tree */
1129 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1130 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1131 /* lookup a conn that's not binding */
1132 LDAP_TAILQ_FOREACH( mc,
1133 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1136 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1142 /* move to tail of queue */
1143 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1144 metaconn_t, mc_q ) )
1146 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1148 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1149 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1153 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1154 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1156 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1161 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1162 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1166 /* catch taint errors */
1167 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1169 /* Don't reuse connections while they're still binding
1170 * NOTE: only makes sense for binds */
1171 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1172 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1173 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1175 ldap_pvt_thread_yield();
1179 /* release conn, and create a temporary */
1183 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1184 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
1186 #if META_BACK_PRINT_CONNTREE > 0
1187 meta_back_print_conntree( mi,
1188 ">>> meta_back_getconn(expired)" );
1189 #endif /* META_BACK_PRINT_CONNTREE */
1191 /* don't let anyone else use this expired connection */
1192 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1193 if ( mc->mc_q.tqe_prev != NULL ) {
1194 assert( LDAP_BACK_CONN_CACHED( mc ) );
1195 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1196 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1198 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1199 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1202 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1206 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1207 (caddr_t)mc, meta_back_conndnmc_cmp );
1210 #if META_BACK_PRINT_CONNTREE > 0
1211 meta_back_print_conntree( mi,
1212 "<<< meta_back_getconn(expired)" );
1213 #endif /* META_BACK_PRINT_CONNTREE */
1214 LDAP_BACK_CONN_TAINTED_SET( mc );
1215 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1217 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1218 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1219 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1221 Debug( LDAP_DEBUG_TRACE,
1222 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1223 op->o_log_prefix, (void *)mc, buf );
1230 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1233 switch ( op->o_tag ) {
1235 /* if we go to selection, the entry must not exist,
1236 * and we must be able to resolve the parent */
1237 dn_type = META_DNTYPE_PARENT;
1238 dnParent( &ndn, &pndn );
1241 case LDAP_REQ_MODRDN:
1242 /* if nnewSuperior is not NULL, it must resolve
1243 * to the same candidate as the req_ndn */
1244 if ( op->orr_nnewSup ) {
1245 dn_type = META_DNTYPE_NEWPARENT;
1250 /* if bound as rootdn, the backend must bind to all targets
1251 * with the administrative identity
1252 * (unless pseoudoroot-bind-defer is TRUE) */
1253 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1254 op_type = META_OP_REQUIRE_ALL;
1258 case LDAP_REQ_COMPARE:
1259 case LDAP_REQ_DELETE:
1260 case LDAP_REQ_MODIFY:
1261 /* just a unique candidate */
1264 case LDAP_REQ_SEARCH:
1265 /* allow multiple candidates for the searchBase */
1266 op_type = META_OP_ALLOW_MULTIPLE;
1270 /* right now, just break (exop?) */
1275 * require all connections ...
1277 if ( op_type == META_OP_REQUIRE_ALL ) {
1279 /* Looks like we didn't get a bind. Open a new session... */
1281 assert( new_conn == 0 );
1282 mc = metaconn_alloc( op );
1283 mc->mc_conn = mc_curr.mc_conn;
1284 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1286 if ( sendok & LDAP_BACK_BINDING ) {
1287 LDAP_BACK_CONN_BINDING_SET( mc );
1289 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1290 LDAP_BACK_CONN_ISPRIV_SET( mc );
1292 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1293 LDAP_BACK_CONN_ISANON_SET( mc );
1297 /* TODO: if any of the connections is binding,
1298 * release mc and create a new one */
1301 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1303 * The target is activated; if needed, it is
1306 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1307 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1308 LDAP_BACK_DONTSEND, !new_conn );
1309 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1310 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1311 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1313 META_CANDIDATE_SET( &candidates[ i ] );
1319 * FIXME: in case one target cannot
1320 * be init'd, should the other ones
1323 META_CANDIDATE_RESET( &candidates[ i ] );
1324 err = candidates[ i ].sr_err;
1329 if ( ncandidates == 0 ) {
1332 meta_back_conn_free( mc );
1335 meta_back_release_conn( mi, mc );
1338 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1339 rs->sr_text = "Unable to select valid candidates";
1341 if ( sendok & LDAP_BACK_SENDERR ) {
1342 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1343 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1345 send_ldap_result( op, rs );
1346 rs->sr_matched = NULL;
1356 * looks in cache, if any
1358 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1359 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1362 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1363 metatarget_t *mt = NULL;
1364 metasingleconn_t *msc = NULL;
1368 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1369 META_CANDIDATE_RESET( &candidates[ j ] );
1373 * tries to get a unique candidate
1374 * (takes care of default target)
1376 if ( i == META_TARGET_NONE ) {
1377 i = meta_back_get_candidate( op, rs, &ndn );
1379 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1380 i = meta_back_get_candidate( op, rs, &pndn );
1383 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1385 meta_back_release_conn( mi, mc );
1388 if ( sendok & LDAP_BACK_SENDERR ) {
1389 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1390 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1392 send_ldap_result( op, rs );
1393 rs->sr_matched = NULL;
1400 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1403 meta_back_release_conn( mi, mc );
1406 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1407 rs->sr_text = "Cross-target rename not supported";
1408 if ( sendok & LDAP_BACK_SENDERR ) {
1409 send_ldap_result( op, rs );
1415 Debug( LDAP_DEBUG_TRACE,
1416 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1417 i, op->o_req_ndn.bv_val, 0 );
1420 /* Retries searching for a metaconn in the avl tree
1421 * the reason is that the connection might have been
1422 * created by meta_back_get_candidate() */
1423 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1425 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1426 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1427 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1429 /* catch taint errors */
1430 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1432 /* Don't reuse connections while they're still binding */
1433 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1434 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1436 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1437 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1438 ldap_pvt_thread_yield();
1448 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1451 /* Looks like we didn't get a bind. Open a new session... */
1453 assert( new_conn == 0 );
1454 mc = metaconn_alloc( op );
1455 mc->mc_conn = mc_curr.mc_conn;
1456 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1458 if ( sendok & LDAP_BACK_BINDING ) {
1459 LDAP_BACK_CONN_BINDING_SET( mc );
1461 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1462 LDAP_BACK_CONN_ISPRIV_SET( mc );
1464 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1465 LDAP_BACK_CONN_ISANON_SET( mc );
1471 * Clear all other candidates
1473 ( void )meta_clear_unused_candidates( op, i );
1475 mt = mi->mi_targets[ i ];
1476 msc = &mc->mc_conns[ i ];
1479 * The target is activated; if needed, it is
1480 * also init'd. In case of error, meta_back_init_one_conn
1481 * sends the appropriate result.
1483 err = meta_back_init_one_conn( op, rs, mc, i,
1484 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1485 if ( err != LDAP_SUCCESS ) {
1487 * FIXME: in case one target cannot
1488 * be init'd, should the other ones
1491 META_CANDIDATE_RESET( &candidates[ i ] );
1494 meta_back_conn_free( mc );
1497 meta_back_release_conn( mi, mc );
1502 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1503 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1506 candidates[ i ].sr_err = LDAP_SUCCESS;
1507 META_CANDIDATE_SET( &candidates[ i ] );
1515 * if no unique candidate ...
1519 /* Looks like we didn't get a bind. Open a new session... */
1521 assert( new_conn == 0 );
1522 mc = metaconn_alloc( op );
1523 mc->mc_conn = mc_curr.mc_conn;
1524 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1526 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1527 LDAP_BACK_CONN_ISPRIV_SET( mc );
1529 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1530 LDAP_BACK_CONN_ISANON_SET( mc );
1534 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1535 metatarget_t *mt = mi->mi_targets[ i ];
1537 META_CANDIDATE_RESET( &candidates[ i ] );
1540 || meta_back_is_candidate( mt, &op->o_req_ndn,
1541 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1545 * The target is activated; if needed, it is
1548 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1549 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1550 LDAP_BACK_DONTSEND, !new_conn );
1551 candidates[ i ].sr_err = lerr;
1552 if ( lerr == LDAP_SUCCESS ) {
1553 META_CANDIDATE_SET( &candidates[ i ] );
1556 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1557 op->o_log_prefix, i, 0 );
1559 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1560 META_CANDIDATE_SET( &candidates[ i ] );
1562 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1563 op->o_log_prefix, i,
1564 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1569 * FIXME: in case one target cannot
1570 * be init'd, should the other ones
1574 ( void )meta_clear_one_candidate( op, mc, i );
1576 /* leave the target candidate, but record the error for later use */
1579 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1580 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1581 op->o_log_prefix, i, lerr );
1584 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1585 op->o_log_prefix, i, lerr );
1588 if ( META_BACK_ONERR_STOP( mi ) ) {
1589 if ( sendok & LDAP_BACK_SENDERR ) {
1590 send_ldap_result( op, rs );
1594 meta_back_conn_free( mc );
1597 meta_back_release_conn( mi, mc );
1608 ( void )meta_clear_one_candidate( op, mc, i );
1613 if ( ncandidates == 0 ) {
1616 meta_back_conn_free( mc );
1619 meta_back_release_conn( mi, mc );
1622 if ( rs->sr_err == LDAP_SUCCESS ) {
1623 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1624 rs->sr_text = "Unable to select valid candidates";
1627 if ( sendok & LDAP_BACK_SENDERR ) {
1628 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1629 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1631 send_ldap_result( op, rs );
1632 rs->sr_matched = NULL;
1640 /* clear out meta_back_init_one_conn non-fatal errors */
1641 rs->sr_err = LDAP_SUCCESS;
1644 /* touch the timestamp */
1645 if ( mi->mi_idle_timeout != 0 ) {
1646 mc->mc_time = op->o_time;
1650 if ( mi->mi_conn_ttl ) {
1651 mc->mc_create_time = op->o_time;
1655 * Inserts the newly created metaconn in the avl tree
1657 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1658 #if META_BACK_PRINT_CONNTREE > 0
1659 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1660 #endif /* META_BACK_PRINT_CONNTREE */
1663 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1664 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1665 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1666 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1667 LDAP_BACK_CONN_CACHED_SET( mc );
1670 LDAP_BACK_CONN_TAINTED_SET( mc );
1674 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1675 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1676 meta_back_conndn_cmp, meta_back_conndn_dup );
1677 LDAP_BACK_CONN_CACHED_SET( mc );
1680 #if META_BACK_PRINT_CONNTREE > 0
1681 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1682 #endif /* META_BACK_PRINT_CONNTREE */
1683 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1685 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1687 * Err could be -1 in case a duplicate metaconn is inserted
1694 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1695 /* duplicate: free and try to get the newly created one */
1696 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1698 meta_back_conn_free( mc );
1704 LDAP_BACK_CONN_TAINTED_SET( mc );
1708 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1709 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1710 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1711 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1713 Debug( LDAP_DEBUG_ANY,
1714 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1715 op->o_log_prefix, ncandidates, buf );
1719 meta_back_conn_free( mc );
1721 rs->sr_err = LDAP_OTHER;
1722 rs->sr_text = "Proxy bind collision";
1723 if ( sendok & LDAP_BACK_SENDERR ) {
1724 send_ldap_result( op, rs );
1730 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1731 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1732 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1734 Debug( LDAP_DEBUG_TRACE,
1735 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1736 op->o_log_prefix, ncandidates, buf );
1740 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1741 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1742 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1744 Debug( LDAP_DEBUG_TRACE,
1745 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1746 op->o_log_prefix, ncandidates, buf );
1754 meta_back_release_conn_lock(
1759 assert( mc != NULL );
1762 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1764 assert( mc->mc_refcnt > 0 );
1766 /* NOTE: the connection is removed if either it is tainted
1767 * or if it is shared and no one else is using it. This needs
1768 * to occur because for intrinsic reasons cached connections
1769 * that are not privileged would live forever and pollute
1770 * the connection space (and eat up resources). Maybe this
1771 * should be configurable... */
1772 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1773 #if META_BACK_PRINT_CONNTREE > 0
1774 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1775 #endif /* META_BACK_PRINT_CONNTREE */
1777 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1778 if ( mc->mc_q.tqe_prev != NULL ) {
1779 assert( LDAP_BACK_CONN_CACHED( mc ) );
1780 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1781 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1782 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1783 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1786 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1789 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1792 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1793 ( caddr_t )mc, meta_back_conndnmc_cmp );
1795 /* Overparanoid, but useful... */
1796 assert( tmpmc == NULL || tmpmc == mc );
1799 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1801 #if META_BACK_PRINT_CONNTREE > 0
1802 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1803 #endif /* META_BACK_PRINT_CONNTREE */
1805 if ( mc->mc_refcnt == 0 ) {
1806 meta_back_conn_free( mc );
1811 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1812 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1816 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1821 meta_back_quarantine(
1826 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1827 metatarget_t *mt = mi->mi_targets[ candidate ];
1829 slap_retry_info_t *ri = &mt->mt_quarantine;
1831 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1833 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1834 time_t new_last = slap_get_time();
1836 switch ( mt->mt_isquarantined ) {
1837 case LDAP_BACK_FQ_NO:
1838 if ( ri->ri_last == new_last ) {
1842 Debug( LDAP_DEBUG_ANY,
1843 "%s meta_back_quarantine[%d]: enter.\n",
1844 op->o_log_prefix, candidate, 0 );
1850 case LDAP_BACK_FQ_RETRYING:
1851 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1852 char buf[ SLAP_TEXT_BUFLEN ];
1854 snprintf( buf, sizeof( buf ),
1855 "meta_back_quarantine[%d]: block #%d try #%d failed",
1856 candidate, ri->ri_idx, ri->ri_count );
1857 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1858 op->o_log_prefix, buf, 0 );
1862 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1863 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1874 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1875 ri->ri_last = new_last;
1877 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1878 Debug( LDAP_DEBUG_ANY,
1879 "%s meta_back_quarantine[%d]: exit.\n",
1880 op->o_log_prefix, candidate, 0 );
1882 if ( mi->mi_quarantine_f ) {
1883 (void)mi->mi_quarantine_f( mi, candidate,
1884 mi->mi_quarantine_p );
1889 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1893 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );