2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2015 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 );
424 slap_client_keepalive(msc->msc_ld, &mt->mt_tls.sb_keepalive);
428 slap_bindconf *sb = NULL;
431 sb = &mt->mt_idassert.si_bc;
436 if ( sb->sb_tls_do_init ) {
437 bindconf_tls_set( sb, msc->msc_ld );
438 } else if ( sb->sb_tls_ctx ) {
439 ldap_set_option( msc->msc_ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
443 if ( sb == &mt->mt_idassert.si_bc && sb->sb_tls_ctx ) {
446 } else if ( META_BACK_TGT_USE_TLS( mt )
447 || ( op->o_conn->c_is_tls && META_BACK_TGT_PROPAGATE_TLS( mt ) ) )
454 /* start TLS ("tls [try-]{start|propagate}" statement) */
455 if ( do_start_tls ) {
456 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
458 * use asynchronous StartTLS; in case, chase referral
459 * FIXME: OpenLDAP does not return referral on StartTLS yet
463 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
464 if ( rs->sr_err == LDAP_SUCCESS ) {
465 LDAPMessage *res = NULL;
466 int rc, nretries = mt->mt_nretries;
469 LDAP_BACK_TV_SET( &tv );
472 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
475 rs->sr_err = LDAP_UNAVAILABLE;
476 rs->sr_text = "Remote server down";
480 if ( nretries != 0 ) {
481 if ( nretries > 0 ) {
484 LDAP_BACK_TV_SET( &tv );
487 rs->sr_err = LDAP_OTHER;
488 rs->sr_text = "Timeout, no more retries";
492 /* only touch when activity actually took place... */
493 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
494 msc->msc_time = op->o_time;
499 if ( rc == LDAP_RES_EXTENDED ) {
500 struct berval *data = NULL;
502 /* NOTE: right now, data is unused, so don't get it */
503 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
504 res, NULL, NULL /* &data */ , 0 );
505 if ( rs->sr_err == LDAP_SUCCESS ) {
508 /* FIXME: matched? referrals? response controls? */
509 rs->sr_err = ldap_parse_result( msc->msc_ld,
510 res, &err, NULL, NULL, NULL, NULL, 1 );
513 if ( rs->sr_err == LDAP_SUCCESS ) {
516 rs->sr_err = slap_map_api2result( rs );
518 /* FIXME: in case a referral
519 * is returned, should we try
520 * using it instead of the
522 if ( rs->sr_err == LDAP_SUCCESS ) {
523 ldap_install_tls( msc->msc_ld );
525 } else if ( rs->sr_err == LDAP_REFERRAL ) {
526 /* FIXME: LDAP_OPERATIONS_ERROR? */
527 rs->sr_err = LDAP_OTHER;
528 rs->sr_text = "Unwilling to chase referral "
529 "returned by Start TLS exop";
538 rs->sr_err = LDAP_OTHER;
539 rs->sr_text = "Unknown response to StartTLS request :"
540 " an ExtendedResposne is expected";
547 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
549 * use synchronous StartTLS
551 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
552 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
554 /* if StartTLS is requested, only attempt it if the URL
555 * is not "ldaps://"; this may occur not only in case
556 * of misconfiguration, but also when used in the chain
557 * overlay, where the "uri" can be parsed out of a referral */
558 if ( rs->sr_err == LDAP_SERVER_DOWN
559 || ( rs->sr_err != LDAP_SUCCESS
560 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
564 Debug( LDAP_DEBUG_ANY,
565 "### %s meta_back_init_one_conn(TLS) "
566 "ldap_unbind_ext[%d] ld=%p\n",
567 op->o_log_prefix, candidate,
568 (void *)msc->msc_ld );
569 #endif /* DEBUG_205 */
571 /* need to trash a failed Start TLS */
572 meta_clear_one_candidate( op, mc, candidate );
576 #endif /* HAVE_TLS */
579 * Set the network timeout if set
581 if ( mt->mt_network_timeout != 0 ) {
582 struct timeval network_timeout;
584 network_timeout.tv_usec = 0;
585 network_timeout.tv_sec = mt->mt_network_timeout;
587 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
588 (void *)&network_timeout );
592 * If the connection DN is not null, an attempt to rewrite it is made
596 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
597 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
598 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
599 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
600 memset( msc->msc_cred.bv_val, 0,
601 msc->msc_cred.bv_len );
603 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
605 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
608 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
612 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
613 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
614 ber_memfree_x( msc->msc_cred.bv_val, NULL );
615 BER_BVZERO( &msc->msc_cred );
617 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
618 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
619 BER_BVZERO( &msc->msc_bound_ndn );
621 if ( !BER_BVISEMPTY( &op->o_ndn )
622 && SLAP_IS_AUTHZ_BACKEND( op )
626 dc.conn = op->o_conn;
631 * Rewrite the bind dn if needed
633 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
634 &msc->msc_bound_ndn ) )
638 Debug( LDAP_DEBUG_ANY,
639 "### %s meta_back_init_one_conn(rewrite) "
640 "ldap_unbind_ext[%d] ld=%p\n",
641 op->o_log_prefix, candidate,
642 (void *)msc->msc_ld );
643 #endif /* DEBUG_205 */
645 /* need to trash a connection not fully established */
646 meta_clear_one_candidate( op, mc, candidate );
650 /* copy the DN if needed */
651 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
652 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
655 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
658 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
662 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
666 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
668 META_BACK_CONN_CREATING_CLEAR( msc );
669 if ( rs->sr_err == LDAP_SUCCESS ) {
671 * Sets a cookie for the rewrite session
673 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
674 META_BACK_CONN_INITED_SET( msc );
677 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
680 if ( rs->sr_err != LDAP_SUCCESS ) {
681 /* Get the error message and print it in TRACE mode */
682 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
683 Log4( LDAP_DEBUG_TRACE, ldap_syslog_level, "%s: meta_back_init_one_conn[%d] failed err=%d text=%s\n",
684 op->o_log_prefix, candidate, rs->sr_err, rs->sr_text );
687 rs->sr_err = slap_map_api2result( rs );
688 if ( sendok & LDAP_BACK_SENDERR ) {
689 send_ldap_result( op, rs );
699 * Retries one connection
707 ldap_back_send_t sendok )
709 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
710 metatarget_t *mt = mi->mi_targets[ candidate ];
711 metaconn_t *mc = *mcp;
712 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
713 int rc = LDAP_UNAVAILABLE,
717 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
719 assert( !META_BACK_CONN_CREATING( msc ) );
720 binding = LDAP_BACK_CONN_BINDING( msc );
721 LDAP_BACK_CONN_BINDING_CLEAR( msc );
723 assert( mc->mc_refcnt > 0 );
724 if ( mc->mc_refcnt == 1 ) {
725 struct berval save_cred;
727 if ( LogTest( LDAP_DEBUG_ANY ) ) {
728 char buf[ SLAP_TEXT_BUFLEN ];
730 /* this lock is required; however,
731 * it's invoked only when logging is on */
732 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
733 snprintf( buf, sizeof( buf ),
734 "retrying URI=\"%s\" DN=\"%s\"",
736 BER_BVISNULL( &msc->msc_bound_ndn ) ?
737 "" : msc->msc_bound_ndn.bv_val );
738 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
740 Debug( LDAP_DEBUG_ANY,
741 "%s meta_back_retry[%d]: %s.\n",
742 op->o_log_prefix, candidate, buf );
745 /* save credentials, if any, for later use;
746 * meta_clear_one_candidate() would free them */
747 save_cred = msc->msc_cred;
748 BER_BVZERO( &msc->msc_cred );
750 meta_clear_one_candidate( op, mc, candidate );
751 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
753 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
755 /* mc here must be the regular mc, reset and ready for init */
756 rc = meta_back_init_one_conn( op, rs, mc, candidate,
757 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
759 /* restore credentials, if any and if needed;
760 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
761 * if no msc_bound_ndn is restored, destroy credentials */
762 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
763 && BER_BVISNULL( &msc->msc_cred ) )
765 msc->msc_cred = save_cred;
767 } else if ( !BER_BVISNULL( &save_cred ) ) {
768 memset( save_cred.bv_val, 0, save_cred.bv_len );
769 ber_memfree_x( save_cred.bv_val, NULL );
772 /* restore the "binding" flag, in case */
774 LDAP_BACK_CONN_BINDING_SET( msc );
777 if ( rc == LDAP_SUCCESS ) {
779 LDAP_BACK_CONN_BINDING_SET( msc ); binding = 1;
780 rc = meta_back_single_dobind( op, rs, mcp, candidate,
781 sendok, mt->mt_nretries, 0 );
783 Debug( LDAP_DEBUG_ANY,
784 "%s meta_back_retry[%d]: "
785 "meta_back_single_dobind=%d\n",
786 op->o_log_prefix, candidate, rc );
787 if ( rc == LDAP_SUCCESS ) {
788 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
789 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
791 LDAP_BACK_CONN_ISBOUND_SET( msc );
794 LDAP_BACK_CONN_ISANON_SET( msc );
797 /* when bound, dispose of the "binding" flag */
799 LDAP_BACK_CONN_BINDING_CLEAR( msc );
804 #if 0 /* ITS#7591, following stmt drops needed result msgs */
805 /* don't send twice */
806 sendok &= ~LDAP_BACK_SENDERR;
810 if ( rc != LDAP_SUCCESS ) {
811 SlapReply *candidates = meta_back_candidates_get( op );
813 candidates[ candidate ].sr_err = rc;
815 if ( *mcp != NULL ) {
816 if ( mc->mc_refcnt == 1 ) {
818 LDAP_BACK_CONN_BINDING_CLEAR( msc );
820 (void)meta_clear_one_candidate( op, mc, candidate );
823 LDAP_BACK_CONN_TAINTED_SET( mc );
824 /* only release if mandatory; otherwise
825 * let the caller do what's best before
827 if ( META_BACK_ONERR_STOP( mi ) ) {
828 meta_back_release_conn_lock( mi, mc, 0 );
832 #if META_BACK_PRINT_CONNTREE > 0
833 meta_back_print_conntree( mi, ">>> meta_back_retry" );
834 #endif /* META_BACK_PRINT_CONNTREE */
836 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
837 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
838 if ( mc->mc_q.tqe_prev != NULL ) {
839 assert( LDAP_BACK_CONN_CACHED( mc ) );
840 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
841 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
843 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
844 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
847 assert( !LDAP_BACK_CONN_CACHED( mc ) );
851 /* FIXME: check if in tree, for consistency? */
852 (void)avl_delete( &mi->mi_conninfo.lai_tree,
853 ( caddr_t )mc, meta_back_conndnmc_cmp );
855 LDAP_BACK_CONN_CACHED_CLEAR( mc );
857 #if META_BACK_PRINT_CONNTREE > 0
858 meta_back_print_conntree( mi, "<<< meta_back_retry" );
859 #endif /* META_BACK_PRINT_CONNTREE */
863 if ( sendok & LDAP_BACK_SENDERR ) {
865 rs->sr_text = "Unable to retry";
866 send_ldap_result( op, rs );
870 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
871 meta_back_quarantine( op, rs, candidate );
874 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
876 return rc == LDAP_SUCCESS ? 1 : 0;
880 * callback for unique candidate selection
883 meta_back_conn_cb( Operation *op, SlapReply *rs )
885 assert( op->o_tag == LDAP_REQ_SEARCH );
887 switch ( rs->sr_type ) {
889 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
905 meta_back_get_candidate(
910 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
914 * tries to get a unique candidate
915 * (takes care of default target)
917 candidate = meta_back_select_unique_candidate( mi, ndn );
920 * if any is found, inits the connection
922 if ( candidate == META_TARGET_NONE ) {
923 rs->sr_err = LDAP_NO_SUCH_OBJECT;
924 rs->sr_text = "No suitable candidate target found";
926 } else if ( candidate == META_TARGET_MULTIPLE ) {
928 SlapReply rs2 = { REP_RESULT };
929 slap_callback cb2 = { 0 };
932 /* try to get a unique match for the request ndn
933 * among the multiple candidates available */
934 op2.o_tag = LDAP_REQ_SEARCH;
936 op2.o_req_ndn = *ndn;
937 op2.ors_scope = LDAP_SCOPE_BASE;
938 op2.ors_deref = LDAP_DEREF_NEVER;
939 op2.ors_attrs = slap_anlist_no_attrs;
940 op2.ors_attrsonly = 0;
941 op2.ors_limit = NULL;
943 op2.ors_tlimit = SLAP_NO_LIMIT;
945 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
946 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
948 op2.o_callback = &cb2;
949 cb2.sc_response = meta_back_conn_cb;
950 cb2.sc_private = (void *)&candidate;
952 rc = op->o_bd->be_search( &op2, &rs2 );
954 switch ( rs2.sr_err ) {
957 rs->sr_err = rs2.sr_err;
960 case LDAP_SIZELIMIT_EXCEEDED:
961 /* if multiple candidates can serve the operation,
962 * and a default target is defined, and it is
963 * a candidate, try using it (FIXME: YMMV) */
964 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
965 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
966 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
968 candidate = mi->mi_defaulttarget;
969 rs->sr_err = LDAP_SUCCESS;
973 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
974 rs->sr_text = "Unable to select unique candidate target";
980 rs->sr_err = LDAP_SUCCESS;
986 static void *meta_back_candidates_dummy;
989 meta_back_candidates_keyfree(
993 metacandidates_t *mc = (metacandidates_t *)data;
995 ber_memfree_x( mc->mc_candidates, NULL );
996 ber_memfree_x( data, NULL );
1000 meta_back_candidates_get( Operation *op )
1002 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1003 metacandidates_t *mc;
1005 if ( op->o_threadctx ) {
1008 ldap_pvt_thread_pool_getkey( op->o_threadctx,
1009 &meta_back_candidates_dummy, &data, NULL );
1010 mc = (metacandidates_t *)data;
1013 mc = mi->mi_candidates;
1017 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1018 mc->mc_ntargets = mi->mi_ntargets;
1019 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1020 if ( op->o_threadctx ) {
1024 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1025 &meta_back_candidates_dummy, data,
1026 meta_back_candidates_keyfree,
1030 mi->mi_candidates = mc;
1033 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1034 /* NOTE: in the future, may want to allow back-config
1035 * to add/remove targets from back-meta... */
1036 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1037 sizeof( SlapReply ) * mi->mi_ntargets );
1038 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1039 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1040 mc->mc_ntargets = mi->mi_ntargets;
1043 return mc->mc_candidates;
1049 * Prepares the connection structure
1053 * - determine what DN is being requested:
1055 * op requires candidate checks
1057 * add unique parent of o_req_ndn
1058 * bind unique^*[/all] o_req_ndn [no check]
1059 * compare unique^+ o_req_ndn
1060 * delete unique o_req_ndn
1061 * modify unique o_req_ndn
1062 * search any o_req_ndn
1063 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1065 * - for ops that require the candidate to be unique, in case of multiple
1066 * occurrences an internal search with sizeLimit=1 is performed
1067 * if a unique candidate can actually be determined. If none is found,
1068 * the operation aborts; if multiple are found, the default target
1069 * is used if defined and candidate; otherwise the operation aborts.
1071 * *^note: actually, the bind operation is handled much like a search;
1072 * i.e. the bind is broadcast to all candidate targets.
1074 * +^note: actually, the compare operation is handled much like a search;
1075 * i.e. the compare is broadcast to all candidate targets, while checking
1076 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1084 ldap_back_send_t sendok )
1086 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1087 metaconn_t *mc = NULL,
1089 int cached = META_TARGET_NONE,
1090 i = META_TARGET_NONE,
1096 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1100 META_DNTYPE_NEWPARENT
1101 } dn_type = META_DNTYPE_ENTRY;
1102 struct berval ndn = op->o_req_ndn,
1105 SlapReply *candidates = meta_back_candidates_get( op );
1107 /* Internal searches are privileged and shared. So is root. */
1108 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1109 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1110 || op->o_do_not_cache || be_isroot( op ) )
1112 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1113 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1114 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1116 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1118 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1119 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1120 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1123 mc_curr.mc_local_ndn = op->o_ndn;
1125 /* Explicit binds must not be shared */
1126 if ( !BER_BVISEMPTY( &op->o_ndn )
1127 || op->o_tag == LDAP_REQ_BIND
1128 || SLAP_IS_AUTHZ_BACKEND( op ) )
1130 mc_curr.mc_conn = op->o_conn;
1133 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1134 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1138 /* Explicit Bind requests always get their own conn */
1139 if ( sendok & LDAP_BACK_BINDING ) {
1140 mc_curr.mc_conn = op->o_conn;
1143 /* Searches for a metaconn in the avl tree */
1145 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1146 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1147 /* lookup a conn that's not binding */
1148 LDAP_TAILQ_FOREACH( mc,
1149 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1152 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1158 /* move to tail of queue */
1159 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1160 metaconn_t, mc_q ) )
1162 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1164 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1165 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1169 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1170 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1172 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1177 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1178 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1182 /* catch taint errors */
1183 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1185 /* Don't reuse connections while they're still binding
1186 * NOTE: only makes sense for binds */
1187 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1188 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1189 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1191 ldap_pvt_thread_yield();
1195 /* release conn, and create a temporary */
1199 if ( mc->mc_refcnt == 0 && (( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1200 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout )) )
1202 #if META_BACK_PRINT_CONNTREE > 0
1203 meta_back_print_conntree( mi,
1204 ">>> meta_back_getconn(expired)" );
1205 #endif /* META_BACK_PRINT_CONNTREE */
1207 /* don't let anyone else use this expired connection */
1208 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1209 if ( mc->mc_q.tqe_prev != NULL ) {
1210 assert( LDAP_BACK_CONN_CACHED( mc ) );
1211 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1212 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1214 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1215 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1218 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1222 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1223 (caddr_t)mc, meta_back_conndnmc_cmp );
1226 #if META_BACK_PRINT_CONNTREE > 0
1227 meta_back_print_conntree( mi,
1228 "<<< meta_back_getconn(expired)" );
1229 #endif /* META_BACK_PRINT_CONNTREE */
1230 LDAP_BACK_CONN_TAINTED_SET( mc );
1231 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1233 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1234 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1235 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1237 Debug( LDAP_DEBUG_TRACE,
1238 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1239 op->o_log_prefix, (void *)mc, buf );
1246 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1249 switch ( op->o_tag ) {
1251 /* if we go to selection, the entry must not exist,
1252 * and we must be able to resolve the parent */
1253 dn_type = META_DNTYPE_PARENT;
1254 dnParent( &ndn, &pndn );
1257 case LDAP_REQ_MODRDN:
1258 /* if nnewSuperior is not NULL, it must resolve
1259 * to the same candidate as the req_ndn */
1260 if ( op->orr_nnewSup ) {
1261 dn_type = META_DNTYPE_NEWPARENT;
1266 /* if bound as rootdn, the backend must bind to all targets
1267 * with the administrative identity
1268 * (unless pseoudoroot-bind-defer is TRUE) */
1269 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1270 op_type = META_OP_REQUIRE_ALL;
1274 case LDAP_REQ_COMPARE:
1275 case LDAP_REQ_DELETE:
1276 case LDAP_REQ_MODIFY:
1277 /* just a unique candidate */
1280 case LDAP_REQ_SEARCH:
1281 /* allow multiple candidates for the searchBase */
1282 op_type = META_OP_ALLOW_MULTIPLE;
1286 /* right now, just break (exop?) */
1291 * require all connections ...
1293 if ( op_type == META_OP_REQUIRE_ALL ) {
1295 /* Looks like we didn't get a bind. Open a new session... */
1297 assert( new_conn == 0 );
1298 mc = metaconn_alloc( op );
1299 mc->mc_conn = mc_curr.mc_conn;
1300 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1302 if ( sendok & LDAP_BACK_BINDING ) {
1303 LDAP_BACK_CONN_BINDING_SET( mc );
1305 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1306 LDAP_BACK_CONN_ISPRIV_SET( mc );
1308 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1309 LDAP_BACK_CONN_ISANON_SET( mc );
1313 /* TODO: if any of the connections is binding,
1314 * release mc and create a new one */
1317 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1319 * The target is activated; if needed, it is
1322 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1323 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1324 LDAP_BACK_DONTSEND, !new_conn );
1325 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1326 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1327 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1329 META_CANDIDATE_SET( &candidates[ i ] );
1335 * FIXME: in case one target cannot
1336 * be init'd, should the other ones
1339 META_CANDIDATE_RESET( &candidates[ i ] );
1340 err = candidates[ i ].sr_err;
1345 if ( ncandidates == 0 ) {
1348 meta_back_conn_free( mc );
1351 meta_back_release_conn( mi, mc );
1354 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1355 rs->sr_text = "Unable to select valid candidates";
1357 if ( sendok & LDAP_BACK_SENDERR ) {
1358 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1359 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1361 send_ldap_result( op, rs );
1362 rs->sr_matched = NULL;
1372 * looks in cache, if any
1374 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1375 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1378 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1379 metatarget_t *mt = NULL;
1380 metasingleconn_t *msc = NULL;
1384 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1385 META_CANDIDATE_RESET( &candidates[ j ] );
1389 * tries to get a unique candidate
1390 * (takes care of default target)
1392 if ( i == META_TARGET_NONE ) {
1393 i = meta_back_get_candidate( op, rs, &ndn );
1395 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1396 i = meta_back_get_candidate( op, rs, &pndn );
1399 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1401 meta_back_release_conn( mi, mc );
1404 if ( sendok & LDAP_BACK_SENDERR ) {
1405 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1406 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1408 send_ldap_result( op, rs );
1409 rs->sr_matched = NULL;
1416 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1419 meta_back_release_conn( mi, mc );
1422 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1423 rs->sr_text = "Cross-target rename not supported";
1424 if ( sendok & LDAP_BACK_SENDERR ) {
1425 send_ldap_result( op, rs );
1431 Debug( LDAP_DEBUG_TRACE,
1432 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1433 i, op->o_req_ndn.bv_val, 0 );
1436 /* Retries searching for a metaconn in the avl tree
1437 * the reason is that the connection might have been
1438 * created by meta_back_get_candidate() */
1439 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1441 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1442 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1443 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1445 /* catch taint errors */
1446 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1448 /* Don't reuse connections while they're still binding */
1449 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1450 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1452 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1453 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1454 ldap_pvt_thread_yield();
1464 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1467 /* Looks like we didn't get a bind. Open a new session... */
1469 assert( new_conn == 0 );
1470 mc = metaconn_alloc( op );
1471 mc->mc_conn = mc_curr.mc_conn;
1472 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1474 if ( sendok & LDAP_BACK_BINDING ) {
1475 LDAP_BACK_CONN_BINDING_SET( mc );
1477 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1478 LDAP_BACK_CONN_ISPRIV_SET( mc );
1480 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1481 LDAP_BACK_CONN_ISANON_SET( mc );
1487 * Clear all other candidates
1489 ( void )meta_clear_unused_candidates( op, i );
1491 mt = mi->mi_targets[ i ];
1492 msc = &mc->mc_conns[ i ];
1495 * The target is activated; if needed, it is
1496 * also init'd. In case of error, meta_back_init_one_conn
1497 * sends the appropriate result.
1499 err = meta_back_init_one_conn( op, rs, mc, i,
1500 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1501 if ( err != LDAP_SUCCESS ) {
1503 * FIXME: in case one target cannot
1504 * be init'd, should the other ones
1507 META_CANDIDATE_RESET( &candidates[ i ] );
1510 meta_back_conn_free( mc );
1513 meta_back_release_conn( mi, mc );
1518 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1519 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1522 candidates[ i ].sr_err = LDAP_SUCCESS;
1523 META_CANDIDATE_SET( &candidates[ i ] );
1531 * if no unique candidate ...
1535 /* Looks like we didn't get a bind. Open a new session... */
1537 assert( new_conn == 0 );
1538 mc = metaconn_alloc( op );
1539 mc->mc_conn = mc_curr.mc_conn;
1540 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1542 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1543 LDAP_BACK_CONN_ISPRIV_SET( mc );
1545 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1546 LDAP_BACK_CONN_ISANON_SET( mc );
1550 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1551 metatarget_t *mt = mi->mi_targets[ i ];
1553 META_CANDIDATE_RESET( &candidates[ i ] );
1556 || meta_back_is_candidate( mt, &op->o_req_ndn,
1557 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1561 * The target is activated; if needed, it is
1564 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1565 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1566 LDAP_BACK_DONTSEND, !new_conn );
1567 candidates[ i ].sr_err = lerr;
1568 if ( lerr == LDAP_SUCCESS ) {
1569 META_CANDIDATE_SET( &candidates[ i ] );
1572 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1573 op->o_log_prefix, i, 0 );
1575 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1576 META_CANDIDATE_SET( &candidates[ i ] );
1578 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1579 op->o_log_prefix, i,
1580 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1585 * FIXME: in case one target cannot
1586 * be init'd, should the other ones
1590 ( void )meta_clear_one_candidate( op, mc, i );
1592 /* leave the target candidate, but record the error for later use */
1595 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1596 Log4( LDAP_DEBUG_TRACE, ldap_syslog_level, "%s: meta_back_getconn[%d] quarantined err=%d text=%s\n",
1597 op->o_log_prefix, i, lerr, rs->sr_text );
1600 Log4( LDAP_DEBUG_ANY, ldap_syslog, "%s: meta_back_getconn[%d] failed err=%d text=%s\n",
1601 op->o_log_prefix, i, lerr, rs->sr_text );
1604 if ( META_BACK_ONERR_STOP( mi ) ) {
1605 if ( sendok & LDAP_BACK_SENDERR ) {
1606 send_ldap_result( op, rs );
1610 meta_back_conn_free( mc );
1613 meta_back_release_conn( mi, mc );
1624 ( void )meta_clear_one_candidate( op, mc, i );
1629 if ( ncandidates == 0 ) {
1632 meta_back_conn_free( mc );
1635 meta_back_release_conn( mi, mc );
1638 if ( rs->sr_err == LDAP_SUCCESS ) {
1639 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1640 rs->sr_text = "Unable to select valid candidates";
1643 if ( sendok & LDAP_BACK_SENDERR ) {
1644 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1645 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1647 send_ldap_result( op, rs );
1648 rs->sr_matched = NULL;
1656 /* clear out meta_back_init_one_conn non-fatal errors */
1657 rs->sr_err = LDAP_SUCCESS;
1660 /* touch the timestamp */
1661 if ( mi->mi_idle_timeout != 0 ) {
1662 mc->mc_time = op->o_time;
1666 if ( mi->mi_conn_ttl ) {
1667 mc->mc_create_time = op->o_time;
1671 * Inserts the newly created metaconn in the avl tree
1673 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1674 #if META_BACK_PRINT_CONNTREE > 0
1675 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1676 #endif /* META_BACK_PRINT_CONNTREE */
1679 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1680 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1681 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1682 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1683 LDAP_BACK_CONN_CACHED_SET( mc );
1686 LDAP_BACK_CONN_TAINTED_SET( mc );
1690 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1691 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1692 meta_back_conndn_cmp, meta_back_conndn_dup );
1693 LDAP_BACK_CONN_CACHED_SET( mc );
1696 #if META_BACK_PRINT_CONNTREE > 0
1697 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1698 #endif /* META_BACK_PRINT_CONNTREE */
1699 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1701 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1703 * Err could be -1 in case a duplicate metaconn is inserted
1710 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1711 /* duplicate: free and try to get the newly created one */
1712 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1714 meta_back_conn_free( mc );
1720 LDAP_BACK_CONN_TAINTED_SET( mc );
1724 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1725 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1726 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1727 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1729 Debug( LDAP_DEBUG_ANY,
1730 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1731 op->o_log_prefix, ncandidates, buf );
1735 meta_back_conn_free( mc );
1737 rs->sr_err = LDAP_OTHER;
1738 rs->sr_text = "Proxy bind collision";
1739 if ( sendok & LDAP_BACK_SENDERR ) {
1740 send_ldap_result( op, rs );
1746 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1747 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1748 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1750 Debug( LDAP_DEBUG_TRACE,
1751 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1752 op->o_log_prefix, ncandidates, buf );
1756 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1757 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1758 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1760 Debug( LDAP_DEBUG_TRACE,
1761 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1762 op->o_log_prefix, ncandidates, buf );
1770 meta_back_release_conn_lock(
1775 assert( mc != NULL );
1778 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1780 assert( mc->mc_refcnt > 0 );
1782 /* NOTE: the connection is removed if either it is tainted
1783 * or if it is shared and no one else is using it. This needs
1784 * to occur because for intrinsic reasons cached connections
1785 * that are not privileged would live forever and pollute
1786 * the connection space (and eat up resources). Maybe this
1787 * should be configurable... */
1788 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1789 #if META_BACK_PRINT_CONNTREE > 0
1790 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1791 #endif /* META_BACK_PRINT_CONNTREE */
1793 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1794 if ( mc->mc_q.tqe_prev != NULL ) {
1795 assert( LDAP_BACK_CONN_CACHED( mc ) );
1796 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1797 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1798 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1799 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1802 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1805 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1808 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1809 ( caddr_t )mc, meta_back_conndnmc_cmp );
1811 /* Overparanoid, but useful... */
1812 assert( tmpmc == NULL || tmpmc == mc );
1815 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1817 #if META_BACK_PRINT_CONNTREE > 0
1818 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1819 #endif /* META_BACK_PRINT_CONNTREE */
1821 if ( mc->mc_refcnt == 0 ) {
1822 meta_back_conn_free( mc );
1827 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1828 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1832 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1837 meta_back_quarantine(
1842 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1843 metatarget_t *mt = mi->mi_targets[ candidate ];
1845 slap_retry_info_t *ri = &mt->mt_quarantine;
1847 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1849 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1850 time_t new_last = slap_get_time();
1852 switch ( mt->mt_isquarantined ) {
1853 case LDAP_BACK_FQ_NO:
1854 if ( ri->ri_last == new_last ) {
1858 Debug( LDAP_DEBUG_ANY,
1859 "%s meta_back_quarantine[%d]: enter.\n",
1860 op->o_log_prefix, candidate, 0 );
1866 case LDAP_BACK_FQ_RETRYING:
1867 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1868 char buf[ SLAP_TEXT_BUFLEN ];
1870 snprintf( buf, sizeof( buf ),
1871 "meta_back_quarantine[%d]: block #%d try #%d failed",
1872 candidate, ri->ri_idx, ri->ri_count );
1873 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1874 op->o_log_prefix, buf, 0 );
1878 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1879 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1890 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1891 ri->ri_last = new_last;
1893 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1894 Debug( LDAP_DEBUG_ANY,
1895 "%s meta_back_quarantine[%d]: exit.\n",
1896 op->o_log_prefix, candidate, 0 );
1898 if ( mi->mi_quarantine_f ) {
1899 (void)mi->mi_quarantine_f( mi, candidate,
1900 mi->mi_quarantine_p );
1905 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1909 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );