2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2007 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_ravl_print( Avlnode *root, int depth )
152 meta_back_ravl_print( root->avl_right, depth + 1 );
154 for ( i = 0; i < depth; i++ ) {
155 fprintf( stderr, "-" );
158 mc = (metaconn_t *)root->avl_data;
159 fprintf( stderr, "mc=%p local=\"%s\" conn=%p %s refcnt=%d%s\n",
161 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
163 avl_bf2str( root->avl_bf ), mc->mc_refcnt,
164 LDAP_BACK_CONN_TAINTED( mc ) ? " tainted" : "" );
166 meta_back_ravl_print( root->avl_left, depth + 1 );
169 /* NOTE: duplicate from back-ldap/bind.c */
170 static char* priv2str[] = {
181 meta_back_print_conntree( metainfo_t *mi, char *msg )
185 fprintf( stderr, "========> %s\n", msg );
187 for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
191 fprintf( stderr, " %s[%d]\n", priv2str[ c ], mi->mi_conn_priv[ c ].mic_num );
193 LDAP_TAILQ_FOREACH( mc, &mi->mi_conn_priv[ c ].mic_priv, mc_q )
195 fprintf( stderr, " [%d] mc=%p local=\"%s\" conn=%p refcnt=%d flags=0x%08x\n",
198 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
199 (void *)mc->mc_conn, mc->mc_refcnt, mc->msc_mscflags );
204 if ( mi->mi_conninfo.lai_tree == NULL ) {
205 fprintf( stderr, "\t(empty)\n" );
208 meta_back_ravl_print( mi->mi_conninfo.lai_tree, 0 );
211 fprintf( stderr, "<======== %s\n", msg );
213 #endif /* META_BACK_PRINT_CONNTREE */
221 * Allocates a connection structure, making room for all the referenced targets
227 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
229 int ntargets = mi->mi_ntargets;
231 assert( ntargets > 0 );
233 /* malloc all in one */
234 mc = ( metaconn_t * )ch_calloc( 1, sizeof( metaconn_t )
235 + sizeof( metasingleconn_t ) * ( ntargets - 1 ) );
242 mc->mc_authz_target = META_BOUND_NONE;
249 * meta_back_init_one_conn
251 * Initializes one connection
254 meta_back_init_one_conn(
260 ldap_back_send_t sendok,
263 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
264 metatarget_t *mt = mi->mi_targets[ candidate ];
265 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
268 int isauthz = ( candidate == mc->mc_authz_target );
272 #endif /* HAVE_TLS */
274 /* if the server is quarantined, and
275 * - the current interval did not expire yet, or
276 * - no more retries should occur,
277 * don't return the connection */
278 if ( mt->mt_isquarantined ) {
279 slap_retry_info_t *ri = &mt->mt_quarantine;
282 if ( mt->mt_isquarantined == LDAP_BACK_FQ_YES ) {
283 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
284 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
286 if ( LogTest( LDAP_DEBUG_ANY ) ) {
287 char buf[ SLAP_TEXT_BUFLEN ];
289 snprintf( buf, sizeof( buf ),
290 "meta_back_init_one_conn[%d]: quarantine "
291 "retry block #%d try #%d",
292 candidate, ri->ri_idx, ri->ri_count );
293 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
294 op->o_log_prefix, buf, 0 );
297 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
302 rs->sr_err = LDAP_UNAVAILABLE;
303 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
304 send_ldap_result( op, rs );
312 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
318 if ( LDAP_BACK_CONN_ISBOUND( msc )
319 || LDAP_BACK_CONN_ISANON( msc ) )
321 assert( msc->msc_ld != NULL );
322 rs->sr_err = LDAP_SUCCESS;
325 } else if ( META_BACK_CONN_CREATING( msc )
326 || LDAP_BACK_CONN_BINDING( msc ) )
328 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
330 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
333 ldap_pvt_thread_yield();
337 /* sounds more appropriate */
338 rs->sr_err = LDAP_BUSY;
341 } else if ( META_BACK_CONN_INITED( msc ) ) {
342 assert( msc->msc_ld != NULL );
343 rs->sr_err = LDAP_SUCCESS;
350 META_BACK_CONN_CREATING_SET( msc );
354 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
358 if ( rs->sr_err != LDAP_SUCCESS && op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
359 send_ldap_result( op, rs );
365 assert( msc->msc_ld == NULL );
368 * Attempts to initialize the connection to the target ds
370 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
371 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
373 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
374 #endif /* HAVE_TLS */
375 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
376 if ( rs->sr_err != LDAP_SUCCESS ) {
381 * Set LDAP version. This will always succeed: If the client
382 * bound with a particular version, then so can we.
384 if ( mt->mt_version != 0 ) {
385 version = mt->mt_version;
387 } else if ( op->o_conn->c_protocol != 0 ) {
388 version = op->o_conn->c_protocol;
391 version = LDAP_VERSION3;
393 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
394 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
396 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
397 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
398 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
401 /* start TLS ("tls [try-]{start|propagate}" statement) */
402 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
405 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
407 * use asynchronous StartTLS; in case, chase referral
408 * FIXME: OpenLDAP does not return referral on StartTLS yet
412 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
413 if ( rs->sr_err == LDAP_SUCCESS ) {
414 LDAPMessage *res = NULL;
415 int rc, nretries = mt->mt_nretries;
418 LDAP_BACK_TV_SET( &tv );
421 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
424 rs->sr_err = LDAP_OTHER;
428 if ( nretries != 0 ) {
429 if ( nretries > 0 ) {
432 LDAP_BACK_TV_SET( &tv );
435 rs->sr_err = LDAP_OTHER;
439 /* only touch when activity actually took place... */
440 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
441 msc->msc_time = op->o_time;
446 if ( rc == LDAP_RES_EXTENDED ) {
447 struct berval *data = NULL;
449 /* NOTE: right now, data is unused, so don't get it */
450 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
451 NULL, NULL /* &data */ , 0 );
452 if ( rs->sr_err == LDAP_SUCCESS ) {
455 /* FIXME: matched? referrals? response controls? */
456 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
457 &err, NULL, NULL, NULL, NULL, 1 );
460 if ( rs->sr_err == LDAP_SUCCESS ) {
464 /* FIXME: in case a referral
465 * is returned, should we try
466 * using it instead of the
468 if ( rs->sr_err == LDAP_SUCCESS ) {
469 ldap_install_tls( msc->msc_ld );
471 } else if ( rs->sr_err == LDAP_REFERRAL ) {
472 /* FIXME: LDAP_OPERATIONS_ERROR? */
473 rs->sr_err = LDAP_OTHER;
474 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
478 if ( data->bv_val ) {
479 ber_memfree( data->bv_val );
486 rs->sr_err = LDAP_OTHER;
493 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
495 * use synchronous StartTLS
497 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
498 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
500 /* if StartTLS is requested, only attempt it if the URL
501 * is not "ldaps://"; this may occur not only in case
502 * of misconfiguration, but also when used in the chain
503 * overlay, where the "uri" can be parsed out of a referral */
504 if ( rs->sr_err == LDAP_SERVER_DOWN
505 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
509 Debug( LDAP_DEBUG_ANY, "### %s meta_back_init_one_conn(TLS) ldap_unbind_ext[%d] ld=%p\n",
510 op->o_log_prefix, candidate, (void *)msc->msc_ld );
511 #endif /* DEBUG_205 */
513 /* need to trash a failed Start TLS */
514 meta_clear_one_candidate( op, mc, candidate );
518 #endif /* HAVE_TLS */
521 * Set the network timeout if set
523 if ( mt->mt_network_timeout != 0 ) {
524 struct timeval network_timeout;
526 network_timeout.tv_usec = 0;
527 network_timeout.tv_sec = mt->mt_network_timeout;
529 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
530 (void *)&network_timeout );
534 * If the connection DN is not null, an attempt to rewrite it is made
538 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
539 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
540 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
541 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
542 memset( msc->msc_cred.bv_val, 0,
543 msc->msc_cred.bv_len );
545 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
549 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
553 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
554 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
555 ber_memfree_x( msc->msc_cred.bv_val, NULL );
556 BER_BVZERO( &msc->msc_cred );
558 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
559 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
560 BER_BVZERO( &msc->msc_bound_ndn );
562 if ( !BER_BVISEMPTY( &op->o_ndn )
563 && SLAP_IS_AUTHZ_BACKEND( op )
567 dc.conn = op->o_conn;
572 * Rewrite the bind dn if needed
574 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
575 &msc->msc_bound_ndn ) )
579 Debug( LDAP_DEBUG_ANY, "### %s meta_back_init_one_conn(rewrite) ldap_unbind_ext[%d] ld=%p\n",
580 op->o_log_prefix, candidate, (void *)msc->msc_ld );
581 #endif /* DEBUG_205 */
583 /* need to trash a connection not fully established */
584 meta_clear_one_candidate( op, mc, candidate );
588 /* copy the DN if needed */
589 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
590 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
593 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
596 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
600 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
604 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
606 META_BACK_CONN_CREATING_CLEAR( msc );
607 if ( rs->sr_err == LDAP_SUCCESS ) {
609 * Sets a cookie for the rewrite session
611 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
612 META_BACK_CONN_INITED_SET( msc );
615 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
618 if ( rs->sr_err != LDAP_SUCCESS ) {
619 rs->sr_err = slap_map_api2result( rs );
620 if ( sendok & LDAP_BACK_SENDERR ) {
621 send_ldap_result( op, rs );
632 * Retries one connection
640 ldap_back_send_t sendok )
642 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
643 metatarget_t *mt = mi->mi_targets[ candidate ];
644 metaconn_t *mc = *mcp;
645 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
646 int rc = LDAP_UNAVAILABLE,
650 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
652 assert( !META_BACK_CONN_CREATING( msc ) );
653 binding = LDAP_BACK_CONN_BINDING( msc );
654 LDAP_BACK_CONN_BINDING_CLEAR( msc );
656 assert( mc->mc_refcnt > 0 );
657 if ( mc->mc_refcnt == 1 ) {
658 if ( LogTest( LDAP_DEBUG_ANY ) ) {
659 char buf[ SLAP_TEXT_BUFLEN ];
661 /* this lock is required; however,
662 * it's invoked only when logging is on */
663 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
664 snprintf( buf, sizeof( buf ),
665 "retrying URI=\"%s\" DN=\"%s\"",
667 BER_BVISNULL( &msc->msc_bound_ndn ) ?
668 "" : msc->msc_bound_ndn.bv_val );
669 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
671 Debug( LDAP_DEBUG_ANY,
672 "%s meta_back_retry[%d]: %s.\n",
673 op->o_log_prefix, candidate, buf );
676 meta_clear_one_candidate( op, mc, candidate );
677 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
679 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
681 /* mc here must be the regular mc, reset and ready for init */
682 rc = meta_back_init_one_conn( op, rs, mc, candidate,
683 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
685 /* restore the "binding" flag, in case */
687 LDAP_BACK_CONN_BINDING_SET( msc );
690 if ( rc == LDAP_SUCCESS ) {
692 rc = meta_back_single_dobind( op, rs, mcp, candidate,
693 sendok, mt->mt_nretries, 0 );
695 Debug( LDAP_DEBUG_ANY,
696 "%s meta_back_retry[%d]: "
697 "meta_back_single_dobind=%d\n",
698 op->o_log_prefix, candidate, rc );
699 if ( rc == LDAP_SUCCESS ) {
700 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
701 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
703 LDAP_BACK_CONN_ISBOUND_SET( msc );
706 LDAP_BACK_CONN_ISANON_SET( msc );
709 /* when bound, dispose of the "binding" flag */
711 LDAP_BACK_CONN_BINDING_CLEAR( msc );
716 /* don't send twice */
717 sendok &= ~LDAP_BACK_SENDERR;
720 if ( rc != LDAP_SUCCESS ) {
721 SlapReply *candidates = meta_back_candidates_get( op );
723 candidates[ candidate ].sr_err = rc;
725 if ( *mcp != NULL ) {
726 if ( mc->mc_refcnt == 1 ) {
728 LDAP_BACK_CONN_BINDING_CLEAR( msc );
730 (void)meta_clear_one_candidate( op, mc, candidate );
733 LDAP_BACK_CONN_TAINTED_SET( mc );
734 /* only release if mandatory; otherwise
735 * let the caller do what's best before
737 if ( META_BACK_ONERR_STOP( mi ) ) {
738 meta_back_release_conn_lock( mi, mc, 0 );
742 #if META_BACK_PRINT_CONNTREE > 0
743 meta_back_print_conntree( mi, ">>> meta_back_retry" );
744 #endif /* META_BACK_PRINT_CONNTREE */
746 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
747 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
748 if ( mc->mc_q.tqe_prev != NULL ) {
749 assert( LDAP_BACK_CONN_CACHED( mc ) );
750 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
751 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
753 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
754 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
757 assert( !LDAP_BACK_CONN_CACHED( mc ) );
761 /* FIXME: check if in tree, for consistency? */
762 (void)avl_delete( &mi->mi_conninfo.lai_tree,
763 ( caddr_t )mc, meta_back_conndnmc_cmp );
765 LDAP_BACK_CONN_CACHED_CLEAR( mc );
767 #if META_BACK_PRINT_CONNTREE > 0
768 meta_back_print_conntree( mi, "<<< meta_back_retry" );
769 #endif /* META_BACK_PRINT_CONNTREE */
773 if ( sendok & LDAP_BACK_SENDERR ) {
776 send_ldap_result( op, rs );
780 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
781 meta_back_quarantine( op, rs, candidate );
784 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
786 return rc == LDAP_SUCCESS ? 1 : 0;
790 * callback for unique candidate selection
793 meta_back_conn_cb( Operation *op, SlapReply *rs )
795 assert( op->o_tag == LDAP_REQ_SEARCH );
797 switch ( rs->sr_type ) {
799 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
815 meta_back_get_candidate(
820 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
824 * tries to get a unique candidate
825 * (takes care of default target)
827 candidate = meta_back_select_unique_candidate( mi, ndn );
830 * if any is found, inits the connection
832 if ( candidate == META_TARGET_NONE ) {
833 rs->sr_err = LDAP_NO_SUCH_OBJECT;
834 rs->sr_text = "no suitable candidate target found";
836 } else if ( candidate == META_TARGET_MULTIPLE ) {
839 SlapReply rs2 = { 0 };
840 slap_callback cb2 = { 0 };
843 /* try to get a unique match for the request ndn
844 * among the multiple candidates available */
845 op2.o_tag = LDAP_REQ_SEARCH;
847 op2.o_req_ndn = *ndn;
848 op2.ors_scope = LDAP_SCOPE_BASE;
849 op2.ors_deref = LDAP_DEREF_NEVER;
850 op2.ors_attrs = slap_anlist_no_attrs;
851 op2.ors_attrsonly = 0;
852 op2.ors_limit = NULL;
854 op2.ors_tlimit = SLAP_NO_LIMIT;
856 f.f_choice = LDAP_FILTER_PRESENT;
857 f.f_desc = slap_schema.si_ad_objectClass;
859 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
861 op2.o_callback = &cb2;
862 cb2.sc_response = meta_back_conn_cb;
863 cb2.sc_private = (void *)&candidate;
865 rc = op->o_bd->be_search( &op2, &rs2 );
867 switch ( rs2.sr_err ) {
870 rs->sr_err = rs2.sr_err;
873 case LDAP_SIZELIMIT_EXCEEDED:
874 /* if multiple candidates can serve the operation,
875 * and a default target is defined, and it is
876 * a candidate, try using it (FIXME: YMMV) */
877 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
878 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
879 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
881 candidate = mi->mi_defaulttarget;
882 rs->sr_err = LDAP_SUCCESS;
886 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
887 rs->sr_text = "cannot select unique candidate target";
893 rs->sr_err = LDAP_SUCCESS;
899 static void *meta_back_candidates_dummy;
902 meta_back_candidates_keyfree(
906 metacandidates_t *mc = (metacandidates_t *)data;
908 ber_memfree_x( mc->mc_candidates, NULL );
909 ber_memfree_x( data, NULL );
913 meta_back_candidates_get( Operation *op )
915 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
916 metacandidates_t *mc;
918 if ( op->o_threadctx ) {
921 ldap_pvt_thread_pool_getkey( op->o_threadctx,
922 &meta_back_candidates_dummy, &data, NULL );
923 mc = (metacandidates_t *)data;
926 mc = mi->mi_candidates;
930 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
931 mc->mc_ntargets = mi->mi_ntargets;
932 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
933 if ( op->o_threadctx ) {
937 ldap_pvt_thread_pool_setkey( op->o_threadctx,
938 &meta_back_candidates_dummy, data,
939 meta_back_candidates_keyfree );
942 mi->mi_candidates = mc;
945 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
946 /* NOTE: in the future, may want to allow back-config
947 * to add/remove targets from back-meta... */
948 mc->mc_candidates = ch_realloc( mc->mc_candidates,
949 sizeof( SlapReply ) * mi->mi_ntargets );
950 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
951 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
952 mc->mc_ntargets = mi->mi_ntargets;
955 return mc->mc_candidates;
961 * Prepares the connection structure
965 * - determine what DN is being requested:
967 * op requires candidate checks
969 * add unique parent of o_req_ndn
970 * bind unique^*[/all] o_req_ndn [no check]
971 * compare unique^+ o_req_ndn
972 * delete unique o_req_ndn
973 * modify unique o_req_ndn
974 * search any o_req_ndn
975 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
977 * - for ops that require the candidate to be unique, in case of multiple
978 * occurrences an internal search with sizeLimit=1 is performed
979 * if a unique candidate can actually be determined. If none is found,
980 * the operation aborts; if multiple are found, the default target
981 * is used if defined and candidate; otherwise the operation aborts.
983 * *^note: actually, the bind operation is handled much like a search;
984 * i.e. the bind is broadcast to all candidate targets.
986 * +^note: actually, the compare operation is handled much like a search;
987 * i.e. the compare is broadcast to all candidate targets, while checking
988 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
996 ldap_back_send_t sendok )
998 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
999 metaconn_t *mc = NULL,
1001 int cached = META_TARGET_NONE,
1002 i = META_TARGET_NONE,
1008 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1012 META_DNTYPE_NEWPARENT
1013 } dn_type = META_DNTYPE_ENTRY;
1014 struct berval ndn = op->o_req_ndn,
1017 SlapReply *candidates = meta_back_candidates_get( op );
1019 /* Internal searches are privileged and shared. So is root. */
1020 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1021 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1022 || op->o_do_not_cache || be_isroot( op ) )
1024 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1025 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1026 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1028 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1030 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1031 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1032 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1035 mc_curr.mc_local_ndn = op->o_ndn;
1037 /* Explicit binds must not be shared */
1038 if ( !BER_BVISEMPTY( &op->o_ndn )
1039 || op->o_tag == LDAP_REQ_BIND
1040 || SLAP_IS_AUTHZ_BACKEND( op ) )
1042 mc_curr.mc_conn = op->o_conn;
1045 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1046 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1050 /* Explicit Bind requests always get their own conn */
1051 if ( sendok & LDAP_BACK_BINDING ) {
1052 mc_curr.mc_conn = op->o_conn;
1055 /* Searches for a metaconn in the avl tree */
1057 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1058 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1059 /* lookup a conn that's not binding */
1060 LDAP_TAILQ_FOREACH( mc,
1061 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1064 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1070 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1071 metaconn_t, mc_q ) )
1073 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1075 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1076 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1080 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1081 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1083 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1088 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1089 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1093 /* catch taint errors */
1094 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1096 /* Don't reuse connections while they're still binding
1097 * NOTE: only makes sense for binds */
1098 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1099 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1100 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1102 ldap_pvt_thread_yield();
1106 /* release conn, and create a temporary */
1110 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1111 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
1113 #if META_BACK_PRINT_CONNTREE > 0
1114 meta_back_print_conntree( mi,
1115 ">>> meta_back_getconn(expired)" );
1116 #endif /* META_BACK_PRINT_CONNTREE */
1118 /* don't let anyone else use this expired connection */
1119 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1120 if ( mc->mc_q.tqe_prev != NULL ) {
1121 assert( LDAP_BACK_CONN_CACHED( mc ) );
1122 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1123 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1125 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1126 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1129 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1133 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1134 (caddr_t)mc, meta_back_conndnmc_cmp );
1137 #if META_BACK_PRINT_CONNTREE > 0
1138 meta_back_print_conntree( mi,
1139 "<<< meta_back_getconn(expired)" );
1140 #endif /* META_BACK_PRINT_CONNTREE */
1141 LDAP_BACK_CONN_TAINTED_SET( mc );
1142 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1144 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired (tainted).\n",
1145 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc ) );
1151 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1154 switch ( op->o_tag ) {
1156 /* if we go to selection, the entry must not exist,
1157 * and we must be able to resolve the parent */
1158 dn_type = META_DNTYPE_PARENT;
1159 dnParent( &ndn, &pndn );
1162 case LDAP_REQ_MODRDN:
1163 /* if nnewSuperior is not NULL, it must resolve
1164 * to the same candidate as the req_ndn */
1165 if ( op->orr_nnewSup ) {
1166 dn_type = META_DNTYPE_NEWPARENT;
1171 /* if bound as rootdn, the backend must bind to all targets
1172 * with the administrative identity */
1173 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1174 op_type = META_OP_REQUIRE_ALL;
1178 case LDAP_REQ_COMPARE:
1179 case LDAP_REQ_DELETE:
1180 case LDAP_REQ_MODIFY:
1181 /* just a unique candidate */
1184 case LDAP_REQ_SEARCH:
1185 /* allow multiple candidates for the searchBase */
1186 op_type = META_OP_ALLOW_MULTIPLE;
1190 /* right now, just break (exop?) */
1195 * require all connections ...
1197 if ( op_type == META_OP_REQUIRE_ALL ) {
1199 /* Looks like we didn't get a bind. Open a new session... */
1201 assert( new_conn == 0 );
1202 mc = metaconn_alloc( op );
1203 mc->mc_conn = mc_curr.mc_conn;
1204 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1206 if ( sendok & LDAP_BACK_BINDING ) {
1207 LDAP_BACK_CONN_BINDING_SET( mc );
1209 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1210 LDAP_BACK_CONN_ISPRIV_SET( mc );
1212 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1213 LDAP_BACK_CONN_ISANON_SET( mc );
1217 /* TODO: if any of the connections is binding,
1218 * release mc and create a new one */
1221 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1223 * The target is activated; if needed, it is
1226 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1227 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1228 LDAP_BACK_DONTSEND, !new_conn );
1229 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1230 META_CANDIDATE_SET( &candidates[ i ] );
1236 * FIXME: in case one target cannot
1237 * be init'd, should the other ones
1240 META_CANDIDATE_RESET( &candidates[ i ] );
1241 err = candidates[ i ].sr_err;
1246 if ( ncandidates == 0 ) {
1249 meta_back_conn_free( mc );
1252 meta_back_release_conn( mi, mc );
1255 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1256 rs->sr_text = "Unable to select valid candidates";
1258 if ( sendok & LDAP_BACK_SENDERR ) {
1259 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1260 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1262 send_ldap_result( op, rs );
1264 rs->sr_matched = NULL;
1274 * looks in cache, if any
1276 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1277 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1280 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1281 metatarget_t *mt = NULL;
1282 metasingleconn_t *msc = NULL;
1286 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1287 META_CANDIDATE_RESET( &candidates[ j ] );
1291 * tries to get a unique candidate
1292 * (takes care of default target)
1294 if ( i == META_TARGET_NONE ) {
1295 i = meta_back_get_candidate( op, rs, &ndn );
1297 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1298 i = meta_back_get_candidate( op, rs, &pndn );
1301 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1303 meta_back_release_conn( mi, mc );
1306 if ( sendok & LDAP_BACK_SENDERR ) {
1307 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1308 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1310 send_ldap_result( op, rs );
1312 rs->sr_matched = NULL;
1319 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1322 meta_back_release_conn( mi, mc );
1325 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1326 rs->sr_text = "cross-target rename not supported";
1327 if ( sendok & LDAP_BACK_SENDERR ) {
1328 send_ldap_result( op, rs );
1335 Debug( LDAP_DEBUG_TRACE,
1336 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1337 i, op->o_req_ndn.bv_val, 0 );
1340 /* Retries searching for a metaconn in the avl tree
1341 * the reason is that the connection might have been
1342 * created by meta_back_get_candidate() */
1343 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1345 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1346 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1347 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1349 /* catch taint errors */
1350 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1352 /* Don't reuse connections while they're still binding */
1353 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1354 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1356 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1357 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1358 ldap_pvt_thread_yield();
1368 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1371 /* Looks like we didn't get a bind. Open a new session... */
1373 assert( new_conn == 0 );
1374 mc = metaconn_alloc( op );
1375 mc->mc_conn = mc_curr.mc_conn;
1376 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1378 if ( sendok & LDAP_BACK_BINDING ) {
1379 LDAP_BACK_CONN_BINDING_SET( mc );
1381 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1382 LDAP_BACK_CONN_ISPRIV_SET( mc );
1384 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1385 LDAP_BACK_CONN_ISANON_SET( mc );
1391 * Clear all other candidates
1393 ( void )meta_clear_unused_candidates( op, i );
1395 mt = mi->mi_targets[ i ];
1396 msc = &mc->mc_conns[ i ];
1399 * The target is activated; if needed, it is
1400 * also init'd. In case of error, meta_back_init_one_conn
1401 * sends the appropriate result.
1403 err = meta_back_init_one_conn( op, rs, mc, i,
1404 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1405 if ( err != LDAP_SUCCESS ) {
1407 * FIXME: in case one target cannot
1408 * be init'd, should the other ones
1411 META_CANDIDATE_RESET( &candidates[ i ] );
1414 meta_back_conn_free( mc );
1417 meta_back_release_conn( mi, mc );
1422 candidates[ i ].sr_err = LDAP_SUCCESS;
1423 META_CANDIDATE_SET( &candidates[ i ] );
1431 * if no unique candidate ...
1435 /* Looks like we didn't get a bind. Open a new session... */
1437 assert( new_conn == 0 );
1438 mc = metaconn_alloc( op );
1439 mc->mc_conn = mc_curr.mc_conn;
1440 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1442 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1443 LDAP_BACK_CONN_ISPRIV_SET( mc );
1445 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1446 LDAP_BACK_CONN_ISANON_SET( mc );
1450 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1451 metatarget_t *mt = mi->mi_targets[ i ];
1453 META_CANDIDATE_RESET( &candidates[ i ] );
1456 || meta_back_is_candidate( mt, &op->o_req_ndn,
1457 LDAP_SCOPE_SUBTREE ) )
1461 * The target is activated; if needed, it is
1464 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1465 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1466 LDAP_BACK_DONTSEND, !new_conn );
1467 candidates[ i ].sr_err = lerr;
1468 if ( lerr == LDAP_SUCCESS ) {
1469 META_CANDIDATE_SET( &candidates[ i ] );
1472 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1473 op->o_log_prefix, i, 0 );
1475 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1476 META_CANDIDATE_SET( &candidates[ i ] );
1478 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1479 op->o_log_prefix, i,
1480 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1485 * FIXME: in case one target cannot
1486 * be init'd, should the other ones
1490 ( void )meta_clear_one_candidate( op, mc, i );
1492 /* leave the target candidate, but record the error for later use */
1495 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1496 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1497 op->o_log_prefix, i, lerr );
1500 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1501 op->o_log_prefix, i, lerr );
1504 if ( META_BACK_ONERR_STOP( mi ) ) {
1505 if ( sendok & LDAP_BACK_SENDERR ) {
1506 send_ldap_result( op, rs );
1511 meta_back_conn_free( mc );
1514 meta_back_release_conn( mi, mc );
1526 ( void )meta_clear_one_candidate( op, mc, i );
1531 if ( ncandidates == 0 ) {
1534 meta_back_conn_free( mc );
1537 meta_back_release_conn( mi, mc );
1540 if ( rs->sr_err == LDAP_SUCCESS ) {
1541 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1542 rs->sr_text = "Unable to select valid candidates";
1545 if ( sendok & LDAP_BACK_SENDERR ) {
1546 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1547 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1549 send_ldap_result( op, rs );
1551 rs->sr_matched = NULL;
1559 /* clear out meta_back_init_one_conn non-fatal errors */
1560 rs->sr_err = LDAP_SUCCESS;
1563 /* touch the timestamp */
1564 if ( mi->mi_idle_timeout != 0 ) {
1565 mc->mc_time = op->o_time;
1569 if ( mi->mi_conn_ttl ) {
1570 mc->mc_create_time = op->o_time;
1574 * Inserts the newly created metaconn in the avl tree
1576 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1577 #if META_BACK_PRINT_CONNTREE > 0
1578 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1579 #endif /* META_BACK_PRINT_CONNTREE */
1581 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1582 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1583 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1584 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1585 LDAP_BACK_CONN_CACHED_SET( mc );
1588 LDAP_BACK_CONN_TAINTED_SET( mc );
1593 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1594 meta_back_conndn_cmp, meta_back_conndn_dup );
1595 LDAP_BACK_CONN_CACHED_SET( mc );
1598 #if META_BACK_PRINT_CONNTREE > 0
1599 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1600 #endif /* META_BACK_PRINT_CONNTREE */
1601 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1603 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1605 * Err could be -1 in case a duplicate metaconn is inserted
1612 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1613 /* duplicate: free and try to get the newly created one */
1614 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1616 meta_back_conn_free( mc );
1622 LDAP_BACK_CONN_TAINTED_SET( mc );
1626 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1627 Debug( LDAP_DEBUG_ANY,
1628 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1629 op->o_log_prefix, ncandidates,
1630 LDAP_BACK_PCONN_ID( mc ) );
1633 meta_back_conn_free( mc );
1635 rs->sr_err = LDAP_OTHER;
1636 rs->sr_text = "proxy bind collision";
1637 if ( sendok & LDAP_BACK_SENDERR ) {
1638 send_ldap_result( op, rs );
1645 Debug( LDAP_DEBUG_TRACE,
1646 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1647 op->o_log_prefix, ncandidates,
1648 LDAP_BACK_PCONN_ID( mc ) );
1651 Debug( LDAP_DEBUG_TRACE,
1652 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1653 op->o_log_prefix, ncandidates,
1654 LDAP_BACK_PCONN_ID( mc ) );
1661 meta_back_release_conn_lock(
1666 assert( mc != NULL );
1669 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1671 assert( mc->mc_refcnt > 0 );
1673 /* NOTE: the connection is removed if either it is tainted
1674 * or if it is shared and no one else is using it. This needs
1675 * to occur because for intrinsic reasons cached connections
1676 * that are not privileged would live forever and pollute
1677 * the connection space (and eat up resources). Maybe this
1678 * should be configurable... */
1679 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1680 #if META_BACK_PRINT_CONNTREE > 0
1681 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1682 #endif /* META_BACK_PRINT_CONNTREE */
1684 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1685 if ( mc->mc_q.tqe_prev != NULL ) {
1686 assert( LDAP_BACK_CONN_CACHED( mc ) );
1687 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1688 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1689 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1690 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1693 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1699 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1700 ( caddr_t )mc, meta_back_conndnmc_cmp );
1702 assert( tmpmc == NULL && tmpmc == mc );
1705 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1707 #if META_BACK_PRINT_CONNTREE > 0
1708 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1709 #endif /* META_BACK_PRINT_CONNTREE */
1711 if ( mc->mc_refcnt == 0 ) {
1712 meta_back_conn_free( mc );
1717 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1718 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1722 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1727 meta_back_quarantine(
1732 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1733 metatarget_t *mt = mi->mi_targets[ candidate ];
1735 slap_retry_info_t *ri = &mt->mt_quarantine;
1737 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1739 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1740 time_t new_last = slap_get_time();
1742 switch ( mt->mt_isquarantined ) {
1743 case LDAP_BACK_FQ_NO:
1744 if ( ri->ri_last == new_last ) {
1748 Debug( LDAP_DEBUG_ANY,
1749 "%s meta_back_quarantine[%d]: enter.\n",
1750 op->o_log_prefix, candidate, 0 );
1756 case LDAP_BACK_FQ_RETRYING:
1757 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1758 char buf[ SLAP_TEXT_BUFLEN ];
1760 snprintf( buf, sizeof( buf ),
1761 "meta_back_quarantine[%d]: block #%d try #%d failed",
1762 candidate, ri->ri_idx, ri->ri_count );
1763 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1764 op->o_log_prefix, buf, 0 );
1768 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1769 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1780 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1781 ri->ri_last = new_last;
1783 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1784 Debug( LDAP_DEBUG_ANY,
1785 "%s meta_back_quarantine[%d]: exit.\n",
1786 op->o_log_prefix, candidate, 0 );
1788 if ( mi->mi_quarantine_f ) {
1789 (void)mi->mi_quarantine_f( mi, candidate,
1790 mi->mi_quarantine_p );
1795 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1799 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );