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 );
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 );
442 if ( sb == &mt->mt_idassert.si_bc && sb->sb_tls_ctx ) {
445 } else if ( META_BACK_TGT_USE_TLS( mt )
446 || ( op->o_conn->c_is_tls && META_BACK_TGT_PROPAGATE_TLS( mt ) ) )
452 /* start TLS ("tls [try-]{start|propagate}" statement) */
453 if ( do_start_tls ) {
454 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
456 * use asynchronous StartTLS; in case, chase referral
457 * FIXME: OpenLDAP does not return referral on StartTLS yet
461 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
462 if ( rs->sr_err == LDAP_SUCCESS ) {
463 LDAPMessage *res = NULL;
464 int rc, nretries = mt->mt_nretries;
467 LDAP_BACK_TV_SET( &tv );
470 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
473 rs->sr_err = LDAP_OTHER;
477 if ( nretries != 0 ) {
478 if ( nretries > 0 ) {
481 LDAP_BACK_TV_SET( &tv );
484 rs->sr_err = LDAP_OTHER;
488 /* only touch when activity actually took place... */
489 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
490 msc->msc_time = op->o_time;
495 if ( rc == LDAP_RES_EXTENDED ) {
496 struct berval *data = NULL;
498 /* NOTE: right now, data is unused, so don't get it */
499 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
500 res, NULL, NULL /* &data */ , 0 );
501 if ( rs->sr_err == LDAP_SUCCESS ) {
504 /* FIXME: matched? referrals? response controls? */
505 rs->sr_err = ldap_parse_result( msc->msc_ld,
506 res, &err, NULL, NULL, NULL, NULL, 1 );
509 if ( rs->sr_err == LDAP_SUCCESS ) {
512 rs->sr_err = slap_map_api2result( rs );
514 /* FIXME: in case a referral
515 * is returned, should we try
516 * using it instead of the
518 if ( rs->sr_err == LDAP_SUCCESS ) {
519 ldap_install_tls( msc->msc_ld );
521 } else if ( rs->sr_err == LDAP_REFERRAL ) {
522 /* FIXME: LDAP_OPERATIONS_ERROR? */
523 rs->sr_err = LDAP_OTHER;
524 rs->sr_text = "Unwilling to chase referral "
525 "returned by Start TLS exop";
534 rs->sr_err = LDAP_OTHER;
541 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
543 * use synchronous StartTLS
545 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
546 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
548 /* if StartTLS is requested, only attempt it if the URL
549 * is not "ldaps://"; this may occur not only in case
550 * of misconfiguration, but also when used in the chain
551 * overlay, where the "uri" can be parsed out of a referral */
552 if ( rs->sr_err == LDAP_SERVER_DOWN
553 || ( rs->sr_err != LDAP_SUCCESS
554 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
558 Debug( LDAP_DEBUG_ANY,
559 "### %s meta_back_init_one_conn(TLS) "
560 "ldap_unbind_ext[%d] ld=%p\n",
561 op->o_log_prefix, candidate,
562 (void *)msc->msc_ld );
563 #endif /* DEBUG_205 */
565 /* need to trash a failed Start TLS */
566 meta_clear_one_candidate( op, mc, candidate );
570 #endif /* HAVE_TLS */
573 * Set the network timeout if set
575 if ( mt->mt_network_timeout != 0 ) {
576 struct timeval network_timeout;
578 network_timeout.tv_usec = 0;
579 network_timeout.tv_sec = mt->mt_network_timeout;
581 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
582 (void *)&network_timeout );
586 * If the connection DN is not null, an attempt to rewrite it is made
590 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
591 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
592 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
593 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
594 memset( msc->msc_cred.bv_val, 0,
595 msc->msc_cred.bv_len );
597 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
599 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
602 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
606 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
607 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
608 ber_memfree_x( msc->msc_cred.bv_val, NULL );
609 BER_BVZERO( &msc->msc_cred );
611 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
612 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
613 BER_BVZERO( &msc->msc_bound_ndn );
615 if ( !BER_BVISEMPTY( &op->o_ndn )
616 && SLAP_IS_AUTHZ_BACKEND( op )
620 dc.conn = op->o_conn;
625 * Rewrite the bind dn if needed
627 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
628 &msc->msc_bound_ndn ) )
632 Debug( LDAP_DEBUG_ANY,
633 "### %s meta_back_init_one_conn(rewrite) "
634 "ldap_unbind_ext[%d] ld=%p\n",
635 op->o_log_prefix, candidate,
636 (void *)msc->msc_ld );
637 #endif /* DEBUG_205 */
639 /* need to trash a connection not fully established */
640 meta_clear_one_candidate( op, mc, candidate );
644 /* copy the DN if needed */
645 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
646 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
649 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
652 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
656 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
660 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
662 META_BACK_CONN_CREATING_CLEAR( msc );
663 if ( rs->sr_err == LDAP_SUCCESS ) {
665 * Sets a cookie for the rewrite session
667 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
668 META_BACK_CONN_INITED_SET( msc );
671 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
674 if ( rs->sr_err != LDAP_SUCCESS ) {
675 rs->sr_err = slap_map_api2result( rs );
676 if ( sendok & LDAP_BACK_SENDERR ) {
677 send_ldap_result( op, rs );
687 * Retries one connection
695 ldap_back_send_t sendok )
697 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
698 metatarget_t *mt = mi->mi_targets[ candidate ];
699 metaconn_t *mc = *mcp;
700 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
701 int rc = LDAP_UNAVAILABLE,
705 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
707 assert( !META_BACK_CONN_CREATING( msc ) );
708 binding = LDAP_BACK_CONN_BINDING( msc );
709 LDAP_BACK_CONN_BINDING_CLEAR( msc );
711 assert( mc->mc_refcnt > 0 );
712 if ( mc->mc_refcnt == 1 ) {
713 struct berval save_cred;
715 if ( LogTest( LDAP_DEBUG_ANY ) ) {
716 char buf[ SLAP_TEXT_BUFLEN ];
718 /* this lock is required; however,
719 * it's invoked only when logging is on */
720 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
721 snprintf( buf, sizeof( buf ),
722 "retrying URI=\"%s\" DN=\"%s\"",
724 BER_BVISNULL( &msc->msc_bound_ndn ) ?
725 "" : msc->msc_bound_ndn.bv_val );
726 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
728 Debug( LDAP_DEBUG_ANY,
729 "%s meta_back_retry[%d]: %s.\n",
730 op->o_log_prefix, candidate, buf );
733 /* save credentials, if any, for later use;
734 * meta_clear_one_candidate() would free them */
735 save_cred = msc->msc_cred;
736 BER_BVZERO( &msc->msc_cred );
738 meta_clear_one_candidate( op, mc, candidate );
739 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
741 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
743 /* mc here must be the regular mc, reset and ready for init */
744 rc = meta_back_init_one_conn( op, rs, mc, candidate,
745 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
747 /* restore credentials, if any and if needed;
748 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
749 * if no msc_bound_ndn is restored, destroy credentials */
750 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
751 && BER_BVISNULL( &msc->msc_cred ) )
753 msc->msc_cred = save_cred;
755 } else if ( !BER_BVISNULL( &save_cred ) ) {
756 memset( save_cred.bv_val, 0, save_cred.bv_len );
757 ber_memfree_x( save_cred.bv_val, NULL );
760 /* restore the "binding" flag, in case */
762 LDAP_BACK_CONN_BINDING_SET( msc );
765 if ( rc == LDAP_SUCCESS ) {
767 LDAP_BACK_CONN_BINDING_SET( msc ); binding = 1;
768 rc = meta_back_single_dobind( op, rs, mcp, candidate,
769 sendok, mt->mt_nretries, 0 );
771 Debug( LDAP_DEBUG_ANY,
772 "%s meta_back_retry[%d]: "
773 "meta_back_single_dobind=%d\n",
774 op->o_log_prefix, candidate, rc );
775 if ( rc == LDAP_SUCCESS ) {
776 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
777 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
779 LDAP_BACK_CONN_ISBOUND_SET( msc );
782 LDAP_BACK_CONN_ISANON_SET( msc );
785 /* when bound, dispose of the "binding" flag */
787 LDAP_BACK_CONN_BINDING_CLEAR( msc );
792 /* don't send twice */
793 sendok &= ~LDAP_BACK_SENDERR;
796 if ( rc != LDAP_SUCCESS ) {
797 SlapReply *candidates = meta_back_candidates_get( op );
799 candidates[ candidate ].sr_err = rc;
801 if ( *mcp != NULL ) {
802 if ( mc->mc_refcnt == 1 ) {
804 LDAP_BACK_CONN_BINDING_CLEAR( msc );
806 (void)meta_clear_one_candidate( op, mc, candidate );
809 LDAP_BACK_CONN_TAINTED_SET( mc );
810 /* only release if mandatory; otherwise
811 * let the caller do what's best before
813 if ( META_BACK_ONERR_STOP( mi ) ) {
814 meta_back_release_conn_lock( mi, mc, 0 );
818 #if META_BACK_PRINT_CONNTREE > 0
819 meta_back_print_conntree( mi, ">>> meta_back_retry" );
820 #endif /* META_BACK_PRINT_CONNTREE */
822 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
823 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
824 if ( mc->mc_q.tqe_prev != NULL ) {
825 assert( LDAP_BACK_CONN_CACHED( mc ) );
826 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
827 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
829 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
830 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
833 assert( !LDAP_BACK_CONN_CACHED( mc ) );
837 /* FIXME: check if in tree, for consistency? */
838 (void)avl_delete( &mi->mi_conninfo.lai_tree,
839 ( caddr_t )mc, meta_back_conndnmc_cmp );
841 LDAP_BACK_CONN_CACHED_CLEAR( mc );
843 #if META_BACK_PRINT_CONNTREE > 0
844 meta_back_print_conntree( mi, "<<< meta_back_retry" );
845 #endif /* META_BACK_PRINT_CONNTREE */
849 if ( sendok & LDAP_BACK_SENDERR ) {
851 rs->sr_text = "Unable to retry";
852 send_ldap_result( op, rs );
856 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
857 meta_back_quarantine( op, rs, candidate );
860 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
862 return rc == LDAP_SUCCESS ? 1 : 0;
866 * callback for unique candidate selection
869 meta_back_conn_cb( Operation *op, SlapReply *rs )
871 assert( op->o_tag == LDAP_REQ_SEARCH );
873 switch ( rs->sr_type ) {
875 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
891 meta_back_get_candidate(
896 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
900 * tries to get a unique candidate
901 * (takes care of default target)
903 candidate = meta_back_select_unique_candidate( mi, ndn );
906 * if any is found, inits the connection
908 if ( candidate == META_TARGET_NONE ) {
909 rs->sr_err = LDAP_NO_SUCH_OBJECT;
910 rs->sr_text = "No suitable candidate target found";
912 } else if ( candidate == META_TARGET_MULTIPLE ) {
914 SlapReply rs2 = { REP_RESULT };
915 slap_callback cb2 = { 0 };
918 /* try to get a unique match for the request ndn
919 * among the multiple candidates available */
920 op2.o_tag = LDAP_REQ_SEARCH;
922 op2.o_req_ndn = *ndn;
923 op2.ors_scope = LDAP_SCOPE_BASE;
924 op2.ors_deref = LDAP_DEREF_NEVER;
925 op2.ors_attrs = slap_anlist_no_attrs;
926 op2.ors_attrsonly = 0;
927 op2.ors_limit = NULL;
929 op2.ors_tlimit = SLAP_NO_LIMIT;
931 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
932 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
934 op2.o_callback = &cb2;
935 cb2.sc_response = meta_back_conn_cb;
936 cb2.sc_private = (void *)&candidate;
938 rc = op->o_bd->be_search( &op2, &rs2 );
940 switch ( rs2.sr_err ) {
943 rs->sr_err = rs2.sr_err;
946 case LDAP_SIZELIMIT_EXCEEDED:
947 /* if multiple candidates can serve the operation,
948 * and a default target is defined, and it is
949 * a candidate, try using it (FIXME: YMMV) */
950 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
951 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
952 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
954 candidate = mi->mi_defaulttarget;
955 rs->sr_err = LDAP_SUCCESS;
959 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
960 rs->sr_text = "Unable to select unique candidate target";
966 rs->sr_err = LDAP_SUCCESS;
972 static void *meta_back_candidates_dummy;
975 meta_back_candidates_keyfree(
979 metacandidates_t *mc = (metacandidates_t *)data;
981 ber_memfree_x( mc->mc_candidates, NULL );
982 ber_memfree_x( data, NULL );
986 meta_back_candidates_get( Operation *op )
988 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
989 metacandidates_t *mc;
991 if ( op->o_threadctx ) {
994 ldap_pvt_thread_pool_getkey( op->o_threadctx,
995 &meta_back_candidates_dummy, &data, NULL );
996 mc = (metacandidates_t *)data;
999 mc = mi->mi_candidates;
1003 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1004 mc->mc_ntargets = mi->mi_ntargets;
1005 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1006 if ( op->o_threadctx ) {
1010 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1011 &meta_back_candidates_dummy, data,
1012 meta_back_candidates_keyfree,
1016 mi->mi_candidates = mc;
1019 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1020 /* NOTE: in the future, may want to allow back-config
1021 * to add/remove targets from back-meta... */
1022 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1023 sizeof( SlapReply ) * mi->mi_ntargets );
1024 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1025 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1026 mc->mc_ntargets = mi->mi_ntargets;
1029 return mc->mc_candidates;
1035 * Prepares the connection structure
1039 * - determine what DN is being requested:
1041 * op requires candidate checks
1043 * add unique parent of o_req_ndn
1044 * bind unique^*[/all] o_req_ndn [no check]
1045 * compare unique^+ o_req_ndn
1046 * delete unique o_req_ndn
1047 * modify unique o_req_ndn
1048 * search any o_req_ndn
1049 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1051 * - for ops that require the candidate to be unique, in case of multiple
1052 * occurrences an internal search with sizeLimit=1 is performed
1053 * if a unique candidate can actually be determined. If none is found,
1054 * the operation aborts; if multiple are found, the default target
1055 * is used if defined and candidate; otherwise the operation aborts.
1057 * *^note: actually, the bind operation is handled much like a search;
1058 * i.e. the bind is broadcast to all candidate targets.
1060 * +^note: actually, the compare operation is handled much like a search;
1061 * i.e. the compare is broadcast to all candidate targets, while checking
1062 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1070 ldap_back_send_t sendok )
1072 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1073 metaconn_t *mc = NULL,
1075 int cached = META_TARGET_NONE,
1076 i = META_TARGET_NONE,
1082 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1086 META_DNTYPE_NEWPARENT
1087 } dn_type = META_DNTYPE_ENTRY;
1088 struct berval ndn = op->o_req_ndn,
1091 SlapReply *candidates = meta_back_candidates_get( op );
1093 /* Internal searches are privileged and shared. So is root. */
1094 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1095 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1096 || op->o_do_not_cache || be_isroot( op ) )
1098 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1099 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1100 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1102 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1104 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1105 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1106 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1109 mc_curr.mc_local_ndn = op->o_ndn;
1111 /* Explicit binds must not be shared */
1112 if ( !BER_BVISEMPTY( &op->o_ndn )
1113 || op->o_tag == LDAP_REQ_BIND
1114 || SLAP_IS_AUTHZ_BACKEND( op ) )
1116 mc_curr.mc_conn = op->o_conn;
1119 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1120 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1124 /* Explicit Bind requests always get their own conn */
1125 if ( sendok & LDAP_BACK_BINDING ) {
1126 mc_curr.mc_conn = op->o_conn;
1129 /* Searches for a metaconn in the avl tree */
1131 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1132 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1133 /* lookup a conn that's not binding */
1134 LDAP_TAILQ_FOREACH( mc,
1135 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1138 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1144 /* move to tail of queue */
1145 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1146 metaconn_t, mc_q ) )
1148 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1150 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1151 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1155 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1156 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1158 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1163 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1164 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1168 /* catch taint errors */
1169 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1171 /* Don't reuse connections while they're still binding
1172 * NOTE: only makes sense for binds */
1173 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1174 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1175 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1177 ldap_pvt_thread_yield();
1181 /* release conn, and create a temporary */
1185 if ( mc->mc_refcnt == 0 && (( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1186 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout )) )
1188 #if META_BACK_PRINT_CONNTREE > 0
1189 meta_back_print_conntree( mi,
1190 ">>> meta_back_getconn(expired)" );
1191 #endif /* META_BACK_PRINT_CONNTREE */
1193 /* don't let anyone else use this expired connection */
1194 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1195 if ( mc->mc_q.tqe_prev != NULL ) {
1196 assert( LDAP_BACK_CONN_CACHED( mc ) );
1197 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1198 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1200 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1201 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1204 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1208 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1209 (caddr_t)mc, meta_back_conndnmc_cmp );
1212 #if META_BACK_PRINT_CONNTREE > 0
1213 meta_back_print_conntree( mi,
1214 "<<< meta_back_getconn(expired)" );
1215 #endif /* META_BACK_PRINT_CONNTREE */
1216 LDAP_BACK_CONN_TAINTED_SET( mc );
1217 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1219 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1220 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1221 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1223 Debug( LDAP_DEBUG_TRACE,
1224 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1225 op->o_log_prefix, (void *)mc, buf );
1232 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1235 switch ( op->o_tag ) {
1237 /* if we go to selection, the entry must not exist,
1238 * and we must be able to resolve the parent */
1239 dn_type = META_DNTYPE_PARENT;
1240 dnParent( &ndn, &pndn );
1243 case LDAP_REQ_MODRDN:
1244 /* if nnewSuperior is not NULL, it must resolve
1245 * to the same candidate as the req_ndn */
1246 if ( op->orr_nnewSup ) {
1247 dn_type = META_DNTYPE_NEWPARENT;
1252 /* if bound as rootdn, the backend must bind to all targets
1253 * with the administrative identity
1254 * (unless pseoudoroot-bind-defer is TRUE) */
1255 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1256 op_type = META_OP_REQUIRE_ALL;
1260 case LDAP_REQ_COMPARE:
1261 case LDAP_REQ_DELETE:
1262 case LDAP_REQ_MODIFY:
1263 /* just a unique candidate */
1266 case LDAP_REQ_SEARCH:
1267 /* allow multiple candidates for the searchBase */
1268 op_type = META_OP_ALLOW_MULTIPLE;
1272 /* right now, just break (exop?) */
1277 * require all connections ...
1279 if ( op_type == META_OP_REQUIRE_ALL ) {
1281 /* Looks like we didn't get a bind. Open a new session... */
1283 assert( new_conn == 0 );
1284 mc = metaconn_alloc( op );
1285 mc->mc_conn = mc_curr.mc_conn;
1286 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1288 if ( sendok & LDAP_BACK_BINDING ) {
1289 LDAP_BACK_CONN_BINDING_SET( mc );
1291 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1292 LDAP_BACK_CONN_ISPRIV_SET( mc );
1294 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1295 LDAP_BACK_CONN_ISANON_SET( mc );
1299 /* TODO: if any of the connections is binding,
1300 * release mc and create a new one */
1303 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1305 * The target is activated; if needed, it is
1308 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1309 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1310 LDAP_BACK_DONTSEND, !new_conn );
1311 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1312 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1313 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1315 META_CANDIDATE_SET( &candidates[ i ] );
1321 * FIXME: in case one target cannot
1322 * be init'd, should the other ones
1325 META_CANDIDATE_RESET( &candidates[ i ] );
1326 err = candidates[ i ].sr_err;
1331 if ( ncandidates == 0 ) {
1334 meta_back_conn_free( mc );
1337 meta_back_release_conn( mi, mc );
1340 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1341 rs->sr_text = "Unable to select valid candidates";
1343 if ( sendok & LDAP_BACK_SENDERR ) {
1344 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1345 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1347 send_ldap_result( op, rs );
1348 rs->sr_matched = NULL;
1358 * looks in cache, if any
1360 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1361 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1364 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1365 metatarget_t *mt = NULL;
1366 metasingleconn_t *msc = NULL;
1370 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1371 META_CANDIDATE_RESET( &candidates[ j ] );
1375 * tries to get a unique candidate
1376 * (takes care of default target)
1378 if ( i == META_TARGET_NONE ) {
1379 i = meta_back_get_candidate( op, rs, &ndn );
1381 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1382 i = meta_back_get_candidate( op, rs, &pndn );
1385 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1387 meta_back_release_conn( mi, mc );
1390 if ( sendok & LDAP_BACK_SENDERR ) {
1391 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1392 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1394 send_ldap_result( op, rs );
1395 rs->sr_matched = NULL;
1402 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1405 meta_back_release_conn( mi, mc );
1408 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1409 rs->sr_text = "Cross-target rename not supported";
1410 if ( sendok & LDAP_BACK_SENDERR ) {
1411 send_ldap_result( op, rs );
1417 Debug( LDAP_DEBUG_TRACE,
1418 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1419 i, op->o_req_ndn.bv_val, 0 );
1422 /* Retries searching for a metaconn in the avl tree
1423 * the reason is that the connection might have been
1424 * created by meta_back_get_candidate() */
1425 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1427 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1428 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1429 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1431 /* catch taint errors */
1432 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1434 /* Don't reuse connections while they're still binding */
1435 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1436 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1438 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1439 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1440 ldap_pvt_thread_yield();
1450 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1453 /* Looks like we didn't get a bind. Open a new session... */
1455 assert( new_conn == 0 );
1456 mc = metaconn_alloc( op );
1457 mc->mc_conn = mc_curr.mc_conn;
1458 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1460 if ( sendok & LDAP_BACK_BINDING ) {
1461 LDAP_BACK_CONN_BINDING_SET( mc );
1463 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1464 LDAP_BACK_CONN_ISPRIV_SET( mc );
1466 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1467 LDAP_BACK_CONN_ISANON_SET( mc );
1473 * Clear all other candidates
1475 ( void )meta_clear_unused_candidates( op, i );
1477 mt = mi->mi_targets[ i ];
1478 msc = &mc->mc_conns[ i ];
1481 * The target is activated; if needed, it is
1482 * also init'd. In case of error, meta_back_init_one_conn
1483 * sends the appropriate result.
1485 err = meta_back_init_one_conn( op, rs, mc, i,
1486 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1487 if ( err != LDAP_SUCCESS ) {
1489 * FIXME: in case one target cannot
1490 * be init'd, should the other ones
1493 META_CANDIDATE_RESET( &candidates[ i ] );
1496 meta_back_conn_free( mc );
1499 meta_back_release_conn( mi, mc );
1504 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1505 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1508 candidates[ i ].sr_err = LDAP_SUCCESS;
1509 META_CANDIDATE_SET( &candidates[ i ] );
1517 * if no unique candidate ...
1521 /* Looks like we didn't get a bind. Open a new session... */
1523 assert( new_conn == 0 );
1524 mc = metaconn_alloc( op );
1525 mc->mc_conn = mc_curr.mc_conn;
1526 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1528 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1529 LDAP_BACK_CONN_ISPRIV_SET( mc );
1531 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1532 LDAP_BACK_CONN_ISANON_SET( mc );
1536 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1537 metatarget_t *mt = mi->mi_targets[ i ];
1539 META_CANDIDATE_RESET( &candidates[ i ] );
1542 || meta_back_is_candidate( mt, &op->o_req_ndn,
1543 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1547 * The target is activated; if needed, it is
1550 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1551 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1552 LDAP_BACK_DONTSEND, !new_conn );
1553 candidates[ i ].sr_err = lerr;
1554 if ( lerr == LDAP_SUCCESS ) {
1555 META_CANDIDATE_SET( &candidates[ i ] );
1558 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1559 op->o_log_prefix, i, 0 );
1561 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1562 META_CANDIDATE_SET( &candidates[ i ] );
1564 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1565 op->o_log_prefix, i,
1566 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1571 * FIXME: in case one target cannot
1572 * be init'd, should the other ones
1576 ( void )meta_clear_one_candidate( op, mc, i );
1578 /* leave the target candidate, but record the error for later use */
1581 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1582 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1583 op->o_log_prefix, i, lerr );
1586 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1587 op->o_log_prefix, i, lerr );
1590 if ( META_BACK_ONERR_STOP( mi ) ) {
1591 if ( sendok & LDAP_BACK_SENDERR ) {
1592 send_ldap_result( op, rs );
1596 meta_back_conn_free( mc );
1599 meta_back_release_conn( mi, mc );
1610 ( void )meta_clear_one_candidate( op, mc, i );
1615 if ( ncandidates == 0 ) {
1618 meta_back_conn_free( mc );
1621 meta_back_release_conn( mi, mc );
1624 if ( rs->sr_err == LDAP_SUCCESS ) {
1625 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1626 rs->sr_text = "Unable to select valid candidates";
1629 if ( sendok & LDAP_BACK_SENDERR ) {
1630 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1631 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1633 send_ldap_result( op, rs );
1634 rs->sr_matched = NULL;
1642 /* clear out meta_back_init_one_conn non-fatal errors */
1643 rs->sr_err = LDAP_SUCCESS;
1646 /* touch the timestamp */
1647 if ( mi->mi_idle_timeout != 0 ) {
1648 mc->mc_time = op->o_time;
1652 if ( mi->mi_conn_ttl ) {
1653 mc->mc_create_time = op->o_time;
1657 * Inserts the newly created metaconn in the avl tree
1659 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1660 #if META_BACK_PRINT_CONNTREE > 0
1661 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1662 #endif /* META_BACK_PRINT_CONNTREE */
1665 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1666 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1667 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1668 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1669 LDAP_BACK_CONN_CACHED_SET( mc );
1672 LDAP_BACK_CONN_TAINTED_SET( mc );
1676 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1677 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1678 meta_back_conndn_cmp, meta_back_conndn_dup );
1679 LDAP_BACK_CONN_CACHED_SET( mc );
1682 #if META_BACK_PRINT_CONNTREE > 0
1683 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1684 #endif /* META_BACK_PRINT_CONNTREE */
1685 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1687 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1689 * Err could be -1 in case a duplicate metaconn is inserted
1696 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1697 /* duplicate: free and try to get the newly created one */
1698 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1700 meta_back_conn_free( mc );
1706 LDAP_BACK_CONN_TAINTED_SET( mc );
1710 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1711 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1712 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1713 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1715 Debug( LDAP_DEBUG_ANY,
1716 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1717 op->o_log_prefix, ncandidates, buf );
1721 meta_back_conn_free( mc );
1723 rs->sr_err = LDAP_OTHER;
1724 rs->sr_text = "Proxy bind collision";
1725 if ( sendok & LDAP_BACK_SENDERR ) {
1726 send_ldap_result( op, rs );
1732 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1733 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1734 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1736 Debug( LDAP_DEBUG_TRACE,
1737 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1738 op->o_log_prefix, ncandidates, buf );
1742 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1743 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1744 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1746 Debug( LDAP_DEBUG_TRACE,
1747 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1748 op->o_log_prefix, ncandidates, buf );
1756 meta_back_release_conn_lock(
1761 assert( mc != NULL );
1764 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1766 assert( mc->mc_refcnt > 0 );
1768 /* NOTE: the connection is removed if either it is tainted
1769 * or if it is shared and no one else is using it. This needs
1770 * to occur because for intrinsic reasons cached connections
1771 * that are not privileged would live forever and pollute
1772 * the connection space (and eat up resources). Maybe this
1773 * should be configurable... */
1774 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1775 #if META_BACK_PRINT_CONNTREE > 0
1776 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1777 #endif /* META_BACK_PRINT_CONNTREE */
1779 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1780 if ( mc->mc_q.tqe_prev != NULL ) {
1781 assert( LDAP_BACK_CONN_CACHED( mc ) );
1782 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1783 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1784 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1785 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1788 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1791 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1794 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1795 ( caddr_t )mc, meta_back_conndnmc_cmp );
1797 /* Overparanoid, but useful... */
1798 assert( tmpmc == NULL || tmpmc == mc );
1801 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1803 #if META_BACK_PRINT_CONNTREE > 0
1804 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1805 #endif /* META_BACK_PRINT_CONNTREE */
1807 if ( mc->mc_refcnt == 0 ) {
1808 meta_back_conn_free( mc );
1813 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1814 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1818 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1823 meta_back_quarantine(
1828 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1829 metatarget_t *mt = mi->mi_targets[ candidate ];
1831 slap_retry_info_t *ri = &mt->mt_quarantine;
1833 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1835 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1836 time_t new_last = slap_get_time();
1838 switch ( mt->mt_isquarantined ) {
1839 case LDAP_BACK_FQ_NO:
1840 if ( ri->ri_last == new_last ) {
1844 Debug( LDAP_DEBUG_ANY,
1845 "%s meta_back_quarantine[%d]: enter.\n",
1846 op->o_log_prefix, candidate, 0 );
1852 case LDAP_BACK_FQ_RETRYING:
1853 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1854 char buf[ SLAP_TEXT_BUFLEN ];
1856 snprintf( buf, sizeof( buf ),
1857 "meta_back_quarantine[%d]: block #%d try #%d failed",
1858 candidate, ri->ri_idx, ri->ri_count );
1859 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1860 op->o_log_prefix, buf, 0 );
1864 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1865 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1876 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1877 ri->ri_last = new_last;
1879 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1880 Debug( LDAP_DEBUG_ANY,
1881 "%s meta_back_quarantine[%d]: exit.\n",
1882 op->o_log_prefix, candidate, 0 );
1884 if ( mi->mi_quarantine_f ) {
1885 (void)mi->mi_quarantine_f( mi, candidate,
1886 mi->mi_quarantine_p );
1891 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1895 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );