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_OTHER;
479 if ( nretries != 0 ) {
480 if ( nretries > 0 ) {
483 LDAP_BACK_TV_SET( &tv );
486 rs->sr_err = LDAP_OTHER;
490 /* only touch when activity actually took place... */
491 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
492 msc->msc_time = op->o_time;
497 if ( rc == LDAP_RES_EXTENDED ) {
498 struct berval *data = NULL;
500 /* NOTE: right now, data is unused, so don't get it */
501 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
502 res, NULL, NULL /* &data */ , 0 );
503 if ( rs->sr_err == LDAP_SUCCESS ) {
506 /* FIXME: matched? referrals? response controls? */
507 rs->sr_err = ldap_parse_result( msc->msc_ld,
508 res, &err, NULL, NULL, NULL, NULL, 1 );
511 if ( rs->sr_err == LDAP_SUCCESS ) {
514 rs->sr_err = slap_map_api2result( rs );
516 /* FIXME: in case a referral
517 * is returned, should we try
518 * using it instead of the
520 if ( rs->sr_err == LDAP_SUCCESS ) {
521 ldap_install_tls( msc->msc_ld );
523 } else if ( rs->sr_err == LDAP_REFERRAL ) {
524 /* FIXME: LDAP_OPERATIONS_ERROR? */
525 rs->sr_err = LDAP_OTHER;
526 rs->sr_text = "Unwilling to chase referral "
527 "returned by Start TLS exop";
536 rs->sr_err = LDAP_OTHER;
543 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
545 * use synchronous StartTLS
547 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
548 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
550 /* if StartTLS is requested, only attempt it if the URL
551 * is not "ldaps://"; this may occur not only in case
552 * of misconfiguration, but also when used in the chain
553 * overlay, where the "uri" can be parsed out of a referral */
554 if ( rs->sr_err == LDAP_SERVER_DOWN
555 || ( rs->sr_err != LDAP_SUCCESS
556 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
560 Debug( LDAP_DEBUG_ANY,
561 "### %s meta_back_init_one_conn(TLS) "
562 "ldap_unbind_ext[%d] ld=%p\n",
563 op->o_log_prefix, candidate,
564 (void *)msc->msc_ld );
565 #endif /* DEBUG_205 */
567 /* need to trash a failed Start TLS */
568 meta_clear_one_candidate( op, mc, candidate );
572 #endif /* HAVE_TLS */
575 * Set the network timeout if set
577 if ( mt->mt_network_timeout != 0 ) {
578 struct timeval network_timeout;
580 network_timeout.tv_usec = 0;
581 network_timeout.tv_sec = mt->mt_network_timeout;
583 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
584 (void *)&network_timeout );
588 * If the connection DN is not null, an attempt to rewrite it is made
592 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
593 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
594 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
595 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
596 memset( msc->msc_cred.bv_val, 0,
597 msc->msc_cred.bv_len );
599 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
601 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
604 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
608 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
609 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
610 ber_memfree_x( msc->msc_cred.bv_val, NULL );
611 BER_BVZERO( &msc->msc_cred );
613 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
614 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
615 BER_BVZERO( &msc->msc_bound_ndn );
617 if ( !BER_BVISEMPTY( &op->o_ndn )
618 && SLAP_IS_AUTHZ_BACKEND( op )
622 dc.conn = op->o_conn;
627 * Rewrite the bind dn if needed
629 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
630 &msc->msc_bound_ndn ) )
634 Debug( LDAP_DEBUG_ANY,
635 "### %s meta_back_init_one_conn(rewrite) "
636 "ldap_unbind_ext[%d] ld=%p\n",
637 op->o_log_prefix, candidate,
638 (void *)msc->msc_ld );
639 #endif /* DEBUG_205 */
641 /* need to trash a connection not fully established */
642 meta_clear_one_candidate( op, mc, candidate );
646 /* copy the DN if needed */
647 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
648 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
651 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
654 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
658 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
662 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
664 META_BACK_CONN_CREATING_CLEAR( msc );
665 if ( rs->sr_err == LDAP_SUCCESS ) {
667 * Sets a cookie for the rewrite session
669 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
670 META_BACK_CONN_INITED_SET( msc );
673 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
676 if ( rs->sr_err != LDAP_SUCCESS ) {
677 rs->sr_err = slap_map_api2result( rs );
678 if ( sendok & LDAP_BACK_SENDERR ) {
679 send_ldap_result( op, rs );
689 * Retries one connection
697 ldap_back_send_t sendok )
699 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
700 metatarget_t *mt = mi->mi_targets[ candidate ];
701 metaconn_t *mc = *mcp;
702 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
703 int rc = LDAP_UNAVAILABLE,
707 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
709 assert( !META_BACK_CONN_CREATING( msc ) );
710 binding = LDAP_BACK_CONN_BINDING( msc );
711 LDAP_BACK_CONN_BINDING_CLEAR( msc );
713 assert( mc->mc_refcnt > 0 );
714 if ( mc->mc_refcnt == 1 ) {
715 struct berval save_cred;
717 if ( LogTest( LDAP_DEBUG_ANY ) ) {
718 char buf[ SLAP_TEXT_BUFLEN ];
720 /* this lock is required; however,
721 * it's invoked only when logging is on */
722 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
723 snprintf( buf, sizeof( buf ),
724 "retrying URI=\"%s\" DN=\"%s\"",
726 BER_BVISNULL( &msc->msc_bound_ndn ) ?
727 "" : msc->msc_bound_ndn.bv_val );
728 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
730 Debug( LDAP_DEBUG_ANY,
731 "%s meta_back_retry[%d]: %s.\n",
732 op->o_log_prefix, candidate, buf );
735 /* save credentials, if any, for later use;
736 * meta_clear_one_candidate() would free them */
737 save_cred = msc->msc_cred;
738 BER_BVZERO( &msc->msc_cred );
740 meta_clear_one_candidate( op, mc, candidate );
741 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
743 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
745 /* mc here must be the regular mc, reset and ready for init */
746 rc = meta_back_init_one_conn( op, rs, mc, candidate,
747 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
749 /* restore credentials, if any and if needed;
750 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
751 * if no msc_bound_ndn is restored, destroy credentials */
752 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
753 && BER_BVISNULL( &msc->msc_cred ) )
755 msc->msc_cred = save_cred;
757 } else if ( !BER_BVISNULL( &save_cred ) ) {
758 memset( save_cred.bv_val, 0, save_cred.bv_len );
759 ber_memfree_x( save_cred.bv_val, NULL );
762 /* restore the "binding" flag, in case */
764 LDAP_BACK_CONN_BINDING_SET( msc );
767 if ( rc == LDAP_SUCCESS ) {
769 LDAP_BACK_CONN_BINDING_SET( msc ); binding = 1;
770 rc = meta_back_single_dobind( op, rs, mcp, candidate,
771 sendok, mt->mt_nretries, 0 );
773 Debug( LDAP_DEBUG_ANY,
774 "%s meta_back_retry[%d]: "
775 "meta_back_single_dobind=%d\n",
776 op->o_log_prefix, candidate, rc );
777 if ( rc == LDAP_SUCCESS ) {
778 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
779 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
781 LDAP_BACK_CONN_ISBOUND_SET( msc );
784 LDAP_BACK_CONN_ISANON_SET( msc );
787 /* when bound, dispose of the "binding" flag */
789 LDAP_BACK_CONN_BINDING_CLEAR( msc );
794 #if 0 /* ITS#7591, following stmt drops needed result msgs */
795 /* don't send twice */
796 sendok &= ~LDAP_BACK_SENDERR;
800 if ( rc != LDAP_SUCCESS ) {
801 SlapReply *candidates = meta_back_candidates_get( op );
803 candidates[ candidate ].sr_err = rc;
805 if ( *mcp != NULL ) {
806 if ( mc->mc_refcnt == 1 ) {
808 LDAP_BACK_CONN_BINDING_CLEAR( msc );
810 (void)meta_clear_one_candidate( op, mc, candidate );
813 LDAP_BACK_CONN_TAINTED_SET( mc );
814 /* only release if mandatory; otherwise
815 * let the caller do what's best before
817 if ( META_BACK_ONERR_STOP( mi ) ) {
818 meta_back_release_conn_lock( mi, mc, 0 );
822 #if META_BACK_PRINT_CONNTREE > 0
823 meta_back_print_conntree( mi, ">>> meta_back_retry" );
824 #endif /* META_BACK_PRINT_CONNTREE */
826 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
827 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
828 if ( mc->mc_q.tqe_prev != NULL ) {
829 assert( LDAP_BACK_CONN_CACHED( mc ) );
830 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
831 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
833 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
834 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
837 assert( !LDAP_BACK_CONN_CACHED( mc ) );
841 /* FIXME: check if in tree, for consistency? */
842 (void)avl_delete( &mi->mi_conninfo.lai_tree,
843 ( caddr_t )mc, meta_back_conndnmc_cmp );
845 LDAP_BACK_CONN_CACHED_CLEAR( mc );
847 #if META_BACK_PRINT_CONNTREE > 0
848 meta_back_print_conntree( mi, "<<< meta_back_retry" );
849 #endif /* META_BACK_PRINT_CONNTREE */
853 if ( sendok & LDAP_BACK_SENDERR ) {
855 rs->sr_text = "Unable to retry";
856 send_ldap_result( op, rs );
860 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
861 meta_back_quarantine( op, rs, candidate );
864 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
866 return rc == LDAP_SUCCESS ? 1 : 0;
870 * callback for unique candidate selection
873 meta_back_conn_cb( Operation *op, SlapReply *rs )
875 assert( op->o_tag == LDAP_REQ_SEARCH );
877 switch ( rs->sr_type ) {
879 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
895 meta_back_get_candidate(
900 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
904 * tries to get a unique candidate
905 * (takes care of default target)
907 candidate = meta_back_select_unique_candidate( mi, ndn );
910 * if any is found, inits the connection
912 if ( candidate == META_TARGET_NONE ) {
913 rs->sr_err = LDAP_NO_SUCH_OBJECT;
914 rs->sr_text = "No suitable candidate target found";
916 } else if ( candidate == META_TARGET_MULTIPLE ) {
918 SlapReply rs2 = { REP_RESULT };
919 slap_callback cb2 = { 0 };
922 /* try to get a unique match for the request ndn
923 * among the multiple candidates available */
924 op2.o_tag = LDAP_REQ_SEARCH;
926 op2.o_req_ndn = *ndn;
927 op2.ors_scope = LDAP_SCOPE_BASE;
928 op2.ors_deref = LDAP_DEREF_NEVER;
929 op2.ors_attrs = slap_anlist_no_attrs;
930 op2.ors_attrsonly = 0;
931 op2.ors_limit = NULL;
933 op2.ors_tlimit = SLAP_NO_LIMIT;
935 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
936 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
938 op2.o_callback = &cb2;
939 cb2.sc_response = meta_back_conn_cb;
940 cb2.sc_private = (void *)&candidate;
942 rc = op->o_bd->be_search( &op2, &rs2 );
944 switch ( rs2.sr_err ) {
947 rs->sr_err = rs2.sr_err;
950 case LDAP_SIZELIMIT_EXCEEDED:
951 /* if multiple candidates can serve the operation,
952 * and a default target is defined, and it is
953 * a candidate, try using it (FIXME: YMMV) */
954 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
955 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
956 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
958 candidate = mi->mi_defaulttarget;
959 rs->sr_err = LDAP_SUCCESS;
963 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
964 rs->sr_text = "Unable to select unique candidate target";
970 rs->sr_err = LDAP_SUCCESS;
976 static void *meta_back_candidates_dummy;
979 meta_back_candidates_keyfree(
983 metacandidates_t *mc = (metacandidates_t *)data;
985 ber_memfree_x( mc->mc_candidates, NULL );
986 ber_memfree_x( data, NULL );
990 meta_back_candidates_get( Operation *op )
992 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
993 metacandidates_t *mc;
995 if ( op->o_threadctx ) {
998 ldap_pvt_thread_pool_getkey( op->o_threadctx,
999 &meta_back_candidates_dummy, &data, NULL );
1000 mc = (metacandidates_t *)data;
1003 mc = mi->mi_candidates;
1007 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1008 mc->mc_ntargets = mi->mi_ntargets;
1009 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1010 if ( op->o_threadctx ) {
1014 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1015 &meta_back_candidates_dummy, data,
1016 meta_back_candidates_keyfree,
1020 mi->mi_candidates = mc;
1023 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1024 /* NOTE: in the future, may want to allow back-config
1025 * to add/remove targets from back-meta... */
1026 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1027 sizeof( SlapReply ) * mi->mi_ntargets );
1028 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1029 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1030 mc->mc_ntargets = mi->mi_ntargets;
1033 return mc->mc_candidates;
1039 * Prepares the connection structure
1043 * - determine what DN is being requested:
1045 * op requires candidate checks
1047 * add unique parent of o_req_ndn
1048 * bind unique^*[/all] o_req_ndn [no check]
1049 * compare unique^+ o_req_ndn
1050 * delete unique o_req_ndn
1051 * modify unique o_req_ndn
1052 * search any o_req_ndn
1053 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1055 * - for ops that require the candidate to be unique, in case of multiple
1056 * occurrences an internal search with sizeLimit=1 is performed
1057 * if a unique candidate can actually be determined. If none is found,
1058 * the operation aborts; if multiple are found, the default target
1059 * is used if defined and candidate; otherwise the operation aborts.
1061 * *^note: actually, the bind operation is handled much like a search;
1062 * i.e. the bind is broadcast to all candidate targets.
1064 * +^note: actually, the compare operation is handled much like a search;
1065 * i.e. the compare is broadcast to all candidate targets, while checking
1066 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1074 ldap_back_send_t sendok )
1076 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1077 metaconn_t *mc = NULL,
1079 int cached = META_TARGET_NONE,
1080 i = META_TARGET_NONE,
1086 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1090 META_DNTYPE_NEWPARENT
1091 } dn_type = META_DNTYPE_ENTRY;
1092 struct berval ndn = op->o_req_ndn,
1095 SlapReply *candidates = meta_back_candidates_get( op );
1097 /* Internal searches are privileged and shared. So is root. */
1098 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1099 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1100 || op->o_do_not_cache || be_isroot( op ) )
1102 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1103 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1104 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1106 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1108 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1109 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1110 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1113 mc_curr.mc_local_ndn = op->o_ndn;
1115 /* Explicit binds must not be shared */
1116 if ( !BER_BVISEMPTY( &op->o_ndn )
1117 || op->o_tag == LDAP_REQ_BIND
1118 || SLAP_IS_AUTHZ_BACKEND( op ) )
1120 mc_curr.mc_conn = op->o_conn;
1123 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1124 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1128 /* Explicit Bind requests always get their own conn */
1129 if ( sendok & LDAP_BACK_BINDING ) {
1130 mc_curr.mc_conn = op->o_conn;
1133 /* Searches for a metaconn in the avl tree */
1135 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1136 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1137 /* lookup a conn that's not binding */
1138 LDAP_TAILQ_FOREACH( mc,
1139 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1142 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1148 /* move to tail of queue */
1149 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1150 metaconn_t, mc_q ) )
1152 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1154 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1155 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1159 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1160 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1162 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1167 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1168 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1172 /* catch taint errors */
1173 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1175 /* Don't reuse connections while they're still binding
1176 * NOTE: only makes sense for binds */
1177 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1178 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1179 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1181 ldap_pvt_thread_yield();
1185 /* release conn, and create a temporary */
1189 if ( mc->mc_refcnt == 0 && (( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1190 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout )) )
1192 #if META_BACK_PRINT_CONNTREE > 0
1193 meta_back_print_conntree( mi,
1194 ">>> meta_back_getconn(expired)" );
1195 #endif /* META_BACK_PRINT_CONNTREE */
1197 /* don't let anyone else use this expired connection */
1198 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1199 if ( mc->mc_q.tqe_prev != NULL ) {
1200 assert( LDAP_BACK_CONN_CACHED( mc ) );
1201 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1202 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1204 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1205 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1208 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1212 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1213 (caddr_t)mc, meta_back_conndnmc_cmp );
1216 #if META_BACK_PRINT_CONNTREE > 0
1217 meta_back_print_conntree( mi,
1218 "<<< meta_back_getconn(expired)" );
1219 #endif /* META_BACK_PRINT_CONNTREE */
1220 LDAP_BACK_CONN_TAINTED_SET( mc );
1221 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1223 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1224 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1225 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1227 Debug( LDAP_DEBUG_TRACE,
1228 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1229 op->o_log_prefix, (void *)mc, buf );
1236 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1239 switch ( op->o_tag ) {
1241 /* if we go to selection, the entry must not exist,
1242 * and we must be able to resolve the parent */
1243 dn_type = META_DNTYPE_PARENT;
1244 dnParent( &ndn, &pndn );
1247 case LDAP_REQ_MODRDN:
1248 /* if nnewSuperior is not NULL, it must resolve
1249 * to the same candidate as the req_ndn */
1250 if ( op->orr_nnewSup ) {
1251 dn_type = META_DNTYPE_NEWPARENT;
1256 /* if bound as rootdn, the backend must bind to all targets
1257 * with the administrative identity
1258 * (unless pseoudoroot-bind-defer is TRUE) */
1259 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1260 op_type = META_OP_REQUIRE_ALL;
1264 case LDAP_REQ_COMPARE:
1265 case LDAP_REQ_DELETE:
1266 case LDAP_REQ_MODIFY:
1267 /* just a unique candidate */
1270 case LDAP_REQ_SEARCH:
1271 /* allow multiple candidates for the searchBase */
1272 op_type = META_OP_ALLOW_MULTIPLE;
1276 /* right now, just break (exop?) */
1281 * require all connections ...
1283 if ( op_type == META_OP_REQUIRE_ALL ) {
1285 /* Looks like we didn't get a bind. Open a new session... */
1287 assert( new_conn == 0 );
1288 mc = metaconn_alloc( op );
1289 mc->mc_conn = mc_curr.mc_conn;
1290 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1292 if ( sendok & LDAP_BACK_BINDING ) {
1293 LDAP_BACK_CONN_BINDING_SET( mc );
1295 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1296 LDAP_BACK_CONN_ISPRIV_SET( mc );
1298 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1299 LDAP_BACK_CONN_ISANON_SET( mc );
1303 /* TODO: if any of the connections is binding,
1304 * release mc and create a new one */
1307 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1309 * The target is activated; if needed, it is
1312 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1313 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1314 LDAP_BACK_DONTSEND, !new_conn );
1315 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1316 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1317 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1319 META_CANDIDATE_SET( &candidates[ i ] );
1325 * FIXME: in case one target cannot
1326 * be init'd, should the other ones
1329 META_CANDIDATE_RESET( &candidates[ i ] );
1330 err = candidates[ i ].sr_err;
1335 if ( ncandidates == 0 ) {
1338 meta_back_conn_free( mc );
1341 meta_back_release_conn( mi, mc );
1344 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1345 rs->sr_text = "Unable to select valid candidates";
1347 if ( sendok & LDAP_BACK_SENDERR ) {
1348 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1349 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1351 send_ldap_result( op, rs );
1352 rs->sr_matched = NULL;
1362 * looks in cache, if any
1364 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1365 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1368 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1369 metatarget_t *mt = NULL;
1370 metasingleconn_t *msc = NULL;
1374 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1375 META_CANDIDATE_RESET( &candidates[ j ] );
1379 * tries to get a unique candidate
1380 * (takes care of default target)
1382 if ( i == META_TARGET_NONE ) {
1383 i = meta_back_get_candidate( op, rs, &ndn );
1385 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1386 i = meta_back_get_candidate( op, rs, &pndn );
1389 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1391 meta_back_release_conn( mi, mc );
1394 if ( sendok & LDAP_BACK_SENDERR ) {
1395 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1396 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1398 send_ldap_result( op, rs );
1399 rs->sr_matched = NULL;
1406 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1409 meta_back_release_conn( mi, mc );
1412 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1413 rs->sr_text = "Cross-target rename not supported";
1414 if ( sendok & LDAP_BACK_SENDERR ) {
1415 send_ldap_result( op, rs );
1421 Debug( LDAP_DEBUG_TRACE,
1422 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1423 i, op->o_req_ndn.bv_val, 0 );
1426 /* Retries searching for a metaconn in the avl tree
1427 * the reason is that the connection might have been
1428 * created by meta_back_get_candidate() */
1429 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1431 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1432 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1433 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1435 /* catch taint errors */
1436 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1438 /* Don't reuse connections while they're still binding */
1439 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1440 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1442 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1443 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1444 ldap_pvt_thread_yield();
1454 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1457 /* Looks like we didn't get a bind. Open a new session... */
1459 assert( new_conn == 0 );
1460 mc = metaconn_alloc( op );
1461 mc->mc_conn = mc_curr.mc_conn;
1462 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1464 if ( sendok & LDAP_BACK_BINDING ) {
1465 LDAP_BACK_CONN_BINDING_SET( mc );
1467 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1468 LDAP_BACK_CONN_ISPRIV_SET( mc );
1470 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1471 LDAP_BACK_CONN_ISANON_SET( mc );
1477 * Clear all other candidates
1479 ( void )meta_clear_unused_candidates( op, i );
1481 mt = mi->mi_targets[ i ];
1482 msc = &mc->mc_conns[ i ];
1485 * The target is activated; if needed, it is
1486 * also init'd. In case of error, meta_back_init_one_conn
1487 * sends the appropriate result.
1489 err = meta_back_init_one_conn( op, rs, mc, i,
1490 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1491 if ( err != LDAP_SUCCESS ) {
1493 * FIXME: in case one target cannot
1494 * be init'd, should the other ones
1497 META_CANDIDATE_RESET( &candidates[ i ] );
1500 meta_back_conn_free( mc );
1503 meta_back_release_conn( mi, mc );
1508 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1509 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1512 candidates[ i ].sr_err = LDAP_SUCCESS;
1513 META_CANDIDATE_SET( &candidates[ i ] );
1521 * if no unique candidate ...
1525 /* Looks like we didn't get a bind. Open a new session... */
1527 assert( new_conn == 0 );
1528 mc = metaconn_alloc( op );
1529 mc->mc_conn = mc_curr.mc_conn;
1530 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1532 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1533 LDAP_BACK_CONN_ISPRIV_SET( mc );
1535 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1536 LDAP_BACK_CONN_ISANON_SET( mc );
1540 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1541 metatarget_t *mt = mi->mi_targets[ i ];
1543 META_CANDIDATE_RESET( &candidates[ i ] );
1546 || meta_back_is_candidate( mt, &op->o_req_ndn,
1547 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1551 * The target is activated; if needed, it is
1554 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1555 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1556 LDAP_BACK_DONTSEND, !new_conn );
1557 candidates[ i ].sr_err = lerr;
1558 if ( lerr == LDAP_SUCCESS ) {
1559 META_CANDIDATE_SET( &candidates[ i ] );
1562 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1563 op->o_log_prefix, i, 0 );
1565 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1566 META_CANDIDATE_SET( &candidates[ i ] );
1568 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1569 op->o_log_prefix, i,
1570 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1575 * FIXME: in case one target cannot
1576 * be init'd, should the other ones
1580 ( void )meta_clear_one_candidate( op, mc, i );
1582 /* leave the target candidate, but record the error for later use */
1585 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1586 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1587 op->o_log_prefix, i, lerr );
1590 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1591 op->o_log_prefix, i, lerr );
1594 if ( META_BACK_ONERR_STOP( mi ) ) {
1595 if ( sendok & LDAP_BACK_SENDERR ) {
1596 send_ldap_result( op, rs );
1600 meta_back_conn_free( mc );
1603 meta_back_release_conn( mi, mc );
1614 ( void )meta_clear_one_candidate( op, mc, i );
1619 if ( ncandidates == 0 ) {
1622 meta_back_conn_free( mc );
1625 meta_back_release_conn( mi, mc );
1628 if ( rs->sr_err == LDAP_SUCCESS ) {
1629 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1630 rs->sr_text = "Unable to select valid candidates";
1633 if ( sendok & LDAP_BACK_SENDERR ) {
1634 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1635 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1637 send_ldap_result( op, rs );
1638 rs->sr_matched = NULL;
1646 /* clear out meta_back_init_one_conn non-fatal errors */
1647 rs->sr_err = LDAP_SUCCESS;
1650 /* touch the timestamp */
1651 if ( mi->mi_idle_timeout != 0 ) {
1652 mc->mc_time = op->o_time;
1656 if ( mi->mi_conn_ttl ) {
1657 mc->mc_create_time = op->o_time;
1661 * Inserts the newly created metaconn in the avl tree
1663 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1664 #if META_BACK_PRINT_CONNTREE > 0
1665 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1666 #endif /* META_BACK_PRINT_CONNTREE */
1669 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1670 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1671 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1672 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1673 LDAP_BACK_CONN_CACHED_SET( mc );
1676 LDAP_BACK_CONN_TAINTED_SET( mc );
1680 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1681 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1682 meta_back_conndn_cmp, meta_back_conndn_dup );
1683 LDAP_BACK_CONN_CACHED_SET( mc );
1686 #if META_BACK_PRINT_CONNTREE > 0
1687 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1688 #endif /* META_BACK_PRINT_CONNTREE */
1689 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1691 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1693 * Err could be -1 in case a duplicate metaconn is inserted
1700 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1701 /* duplicate: free and try to get the newly created one */
1702 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1704 meta_back_conn_free( mc );
1710 LDAP_BACK_CONN_TAINTED_SET( mc );
1714 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1715 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1716 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1717 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1719 Debug( LDAP_DEBUG_ANY,
1720 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1721 op->o_log_prefix, ncandidates, buf );
1725 meta_back_conn_free( mc );
1727 rs->sr_err = LDAP_OTHER;
1728 rs->sr_text = "Proxy bind collision";
1729 if ( sendok & LDAP_BACK_SENDERR ) {
1730 send_ldap_result( op, rs );
1736 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1737 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1738 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1740 Debug( LDAP_DEBUG_TRACE,
1741 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1742 op->o_log_prefix, ncandidates, buf );
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 fetched\n",
1752 op->o_log_prefix, ncandidates, buf );
1760 meta_back_release_conn_lock(
1765 assert( mc != NULL );
1768 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1770 assert( mc->mc_refcnt > 0 );
1772 /* NOTE: the connection is removed if either it is tainted
1773 * or if it is shared and no one else is using it. This needs
1774 * to occur because for intrinsic reasons cached connections
1775 * that are not privileged would live forever and pollute
1776 * the connection space (and eat up resources). Maybe this
1777 * should be configurable... */
1778 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1779 #if META_BACK_PRINT_CONNTREE > 0
1780 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1781 #endif /* META_BACK_PRINT_CONNTREE */
1783 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1784 if ( mc->mc_q.tqe_prev != NULL ) {
1785 assert( LDAP_BACK_CONN_CACHED( mc ) );
1786 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1787 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1788 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1789 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1792 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1795 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1798 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1799 ( caddr_t )mc, meta_back_conndnmc_cmp );
1801 /* Overparanoid, but useful... */
1802 assert( tmpmc == NULL || tmpmc == mc );
1805 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1807 #if META_BACK_PRINT_CONNTREE > 0
1808 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1809 #endif /* META_BACK_PRINT_CONNTREE */
1811 if ( mc->mc_refcnt == 0 ) {
1812 meta_back_conn_free( mc );
1817 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1818 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1822 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1827 meta_back_quarantine(
1832 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1833 metatarget_t *mt = mi->mi_targets[ candidate ];
1835 slap_retry_info_t *ri = &mt->mt_quarantine;
1837 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1839 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1840 time_t new_last = slap_get_time();
1842 switch ( mt->mt_isquarantined ) {
1843 case LDAP_BACK_FQ_NO:
1844 if ( ri->ri_last == new_last ) {
1848 Debug( LDAP_DEBUG_ANY,
1849 "%s meta_back_quarantine[%d]: enter.\n",
1850 op->o_log_prefix, candidate, 0 );
1856 case LDAP_BACK_FQ_RETRYING:
1857 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1858 char buf[ SLAP_TEXT_BUFLEN ];
1860 snprintf( buf, sizeof( buf ),
1861 "meta_back_quarantine[%d]: block #%d try #%d failed",
1862 candidate, ri->ri_idx, ri->ri_count );
1863 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1864 op->o_log_prefix, buf, 0 );
1868 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1869 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1880 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1881 ri->ri_last = new_last;
1883 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1884 Debug( LDAP_DEBUG_ANY,
1885 "%s meta_back_quarantine[%d]: exit.\n",
1886 op->o_log_prefix, candidate, 0 );
1888 if ( mi->mi_quarantine_f ) {
1889 (void)mi->mi_quarantine_f( mi, candidate,
1890 mi->mi_quarantine_p );
1895 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1899 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );