2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2010 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 #endif /* HAVE_TLS */
286 /* if the server is quarantined, and
287 * - the current interval did not expire yet, or
288 * - no more retries should occur,
289 * don't return the connection */
290 if ( mt->mt_isquarantined ) {
291 slap_retry_info_t *ri = &mt->mt_quarantine;
294 if ( mt->mt_quarantine.ri_interval ) {
295 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
296 dont_retry = ( mt->mt_isquarantined > LDAP_BACK_FQ_NO );
298 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
299 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
301 if ( LogTest( LDAP_DEBUG_ANY ) ) {
302 char buf[ SLAP_TEXT_BUFLEN ];
304 snprintf( buf, sizeof( buf ),
305 "meta_back_init_one_conn[%d]: quarantine "
306 "retry block #%d try #%d",
307 candidate, ri->ri_idx, ri->ri_count );
308 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
309 op->o_log_prefix, buf, 0 );
312 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
316 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );
320 rs->sr_err = LDAP_UNAVAILABLE;
321 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
322 rs->sr_text = "Target is quarantined";
323 send_ldap_result( op, rs );
331 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
337 if ( LDAP_BACK_CONN_ISBOUND( msc )
338 || LDAP_BACK_CONN_ISANON( msc ) )
340 assert( msc->msc_ld != NULL );
341 rs->sr_err = LDAP_SUCCESS;
344 } else if ( META_BACK_CONN_CREATING( msc )
345 || LDAP_BACK_CONN_BINDING( msc ) )
347 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
349 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
352 ldap_pvt_thread_yield();
356 /* sounds more appropriate */
357 rs->sr_err = LDAP_BUSY;
358 rs->sr_text = "No connections to target are available";
361 } else if ( META_BACK_CONN_INITED( msc ) ) {
362 assert( msc->msc_ld != NULL );
363 rs->sr_err = LDAP_SUCCESS;
370 META_BACK_CONN_CREATING_SET( msc );
374 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
378 if ( rs->sr_err != LDAP_SUCCESS
380 && ( sendok & LDAP_BACK_SENDERR ) )
382 send_ldap_result( op, rs );
388 assert( msc->msc_ld == NULL );
391 * Attempts to initialize the connection to the target ds
393 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
394 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
396 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
397 #endif /* HAVE_TLS */
398 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
399 if ( rs->sr_err != LDAP_SUCCESS ) {
404 * Set LDAP version. This will always succeed: If the client
405 * bound with a particular version, then so can we.
407 if ( mt->mt_version != 0 ) {
408 version = mt->mt_version;
410 } else if ( op->o_conn->c_protocol != 0 ) {
411 version = op->o_conn->c_protocol;
414 version = LDAP_VERSION3;
416 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
417 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
419 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
420 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
421 META_BACK_TGT_CHASE_REFERRALS( mt ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
424 /* start TLS ("tls [try-]{start|propagate}" statement) */
425 if ( ( META_BACK_TGT_USE_TLS( mt )
426 || ( op->o_conn->c_is_tls
427 && META_BACK_TGT_PROPAGATE_TLS( mt ) ) )
430 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
432 * use asynchronous StartTLS; in case, chase referral
433 * FIXME: OpenLDAP does not return referral on StartTLS yet
437 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
438 if ( rs->sr_err == LDAP_SUCCESS ) {
439 LDAPMessage *res = NULL;
440 int rc, nretries = mt->mt_nretries;
443 LDAP_BACK_TV_SET( &tv );
446 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
449 rs->sr_err = LDAP_OTHER;
453 if ( nretries != 0 ) {
454 if ( nretries > 0 ) {
457 LDAP_BACK_TV_SET( &tv );
460 rs->sr_err = LDAP_OTHER;
464 /* only touch when activity actually took place... */
465 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
466 msc->msc_time = op->o_time;
471 if ( rc == LDAP_RES_EXTENDED ) {
472 struct berval *data = NULL;
474 /* NOTE: right now, data is unused, so don't get it */
475 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
476 res, NULL, NULL /* &data */ , 0 );
477 if ( rs->sr_err == LDAP_SUCCESS ) {
480 /* FIXME: matched? referrals? response controls? */
481 rs->sr_err = ldap_parse_result( msc->msc_ld,
482 res, &err, NULL, NULL, NULL, NULL, 1 );
485 if ( rs->sr_err == LDAP_SUCCESS ) {
488 rs->sr_err = slap_map_api2result( rs );
490 /* FIXME: in case a referral
491 * is returned, should we try
492 * using it instead of the
494 if ( rs->sr_err == LDAP_SUCCESS ) {
495 ldap_install_tls( msc->msc_ld );
497 } else if ( rs->sr_err == LDAP_REFERRAL ) {
498 /* FIXME: LDAP_OPERATIONS_ERROR? */
499 rs->sr_err = LDAP_OTHER;
500 rs->sr_text = "Unwilling to chase referral "
501 "returned by Start TLS exop";
510 rs->sr_err = LDAP_OTHER;
517 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
519 * use synchronous StartTLS
521 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
522 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
524 /* if StartTLS is requested, only attempt it if the URL
525 * is not "ldaps://"; this may occur not only in case
526 * of misconfiguration, but also when used in the chain
527 * overlay, where the "uri" can be parsed out of a referral */
528 if ( rs->sr_err == LDAP_SERVER_DOWN
529 || ( rs->sr_err != LDAP_SUCCESS
530 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
534 Debug( LDAP_DEBUG_ANY,
535 "### %s meta_back_init_one_conn(TLS) "
536 "ldap_unbind_ext[%d] ld=%p\n",
537 op->o_log_prefix, candidate,
538 (void *)msc->msc_ld );
539 #endif /* DEBUG_205 */
541 /* need to trash a failed Start TLS */
542 meta_clear_one_candidate( op, mc, candidate );
546 #endif /* HAVE_TLS */
549 * Set the network timeout if set
551 if ( mt->mt_network_timeout != 0 ) {
552 struct timeval network_timeout;
554 network_timeout.tv_usec = 0;
555 network_timeout.tv_sec = mt->mt_network_timeout;
557 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
558 (void *)&network_timeout );
562 * If the connection DN is not null, an attempt to rewrite it is made
566 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
567 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
568 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
569 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
570 memset( msc->msc_cred.bv_val, 0,
571 msc->msc_cred.bv_len );
573 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
575 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
578 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
582 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
583 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
584 ber_memfree_x( msc->msc_cred.bv_val, NULL );
585 BER_BVZERO( &msc->msc_cred );
587 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
588 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
589 BER_BVZERO( &msc->msc_bound_ndn );
591 if ( !BER_BVISEMPTY( &op->o_ndn )
592 && SLAP_IS_AUTHZ_BACKEND( op )
596 dc.conn = op->o_conn;
601 * Rewrite the bind dn if needed
603 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
604 &msc->msc_bound_ndn ) )
608 Debug( LDAP_DEBUG_ANY,
609 "### %s meta_back_init_one_conn(rewrite) "
610 "ldap_unbind_ext[%d] ld=%p\n",
611 op->o_log_prefix, candidate,
612 (void *)msc->msc_ld );
613 #endif /* DEBUG_205 */
615 /* need to trash a connection not fully established */
616 meta_clear_one_candidate( op, mc, candidate );
620 /* copy the DN if needed */
621 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
622 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
625 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
628 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
632 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
636 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
638 META_BACK_CONN_CREATING_CLEAR( msc );
639 if ( rs->sr_err == LDAP_SUCCESS ) {
641 * Sets a cookie for the rewrite session
643 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
644 META_BACK_CONN_INITED_SET( msc );
647 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
650 if ( rs->sr_err != LDAP_SUCCESS ) {
651 rs->sr_err = slap_map_api2result( rs );
652 if ( sendok & LDAP_BACK_SENDERR ) {
653 send_ldap_result( op, rs );
663 * Retries one connection
671 ldap_back_send_t sendok )
673 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
674 metatarget_t *mt = mi->mi_targets[ candidate ];
675 metaconn_t *mc = *mcp;
676 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
677 int rc = LDAP_UNAVAILABLE,
681 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
683 assert( !META_BACK_CONN_CREATING( msc ) );
684 binding = LDAP_BACK_CONN_BINDING( msc );
685 LDAP_BACK_CONN_BINDING_CLEAR( msc );
687 assert( mc->mc_refcnt > 0 );
688 if ( mc->mc_refcnt == 1 ) {
689 struct berval save_cred;
691 if ( LogTest( LDAP_DEBUG_ANY ) ) {
692 char buf[ SLAP_TEXT_BUFLEN ];
694 /* this lock is required; however,
695 * it's invoked only when logging is on */
696 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
697 snprintf( buf, sizeof( buf ),
698 "retrying URI=\"%s\" DN=\"%s\"",
700 BER_BVISNULL( &msc->msc_bound_ndn ) ?
701 "" : msc->msc_bound_ndn.bv_val );
702 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
704 Debug( LDAP_DEBUG_ANY,
705 "%s meta_back_retry[%d]: %s.\n",
706 op->o_log_prefix, candidate, buf );
709 /* save credentials, if any, for later use;
710 * meta_clear_one_candidate() would free them */
711 save_cred = msc->msc_cred;
712 BER_BVZERO( &msc->msc_cred );
714 meta_clear_one_candidate( op, mc, candidate );
715 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
717 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
719 /* mc here must be the regular mc, reset and ready for init */
720 rc = meta_back_init_one_conn( op, rs, mc, candidate,
721 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
723 /* restore credentials, if any and if needed;
724 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
725 * if no msc_bound_ndn is restored, destroy credentials */
726 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
727 && BER_BVISNULL( &msc->msc_cred ) )
729 msc->msc_cred = save_cred;
731 } else if ( !BER_BVISNULL( &save_cred ) ) {
732 memset( save_cred.bv_val, 0, save_cred.bv_len );
733 ber_memfree_x( save_cred.bv_val, NULL );
736 /* restore the "binding" flag, in case */
738 LDAP_BACK_CONN_BINDING_SET( msc );
741 if ( rc == LDAP_SUCCESS ) {
743 rc = meta_back_single_dobind( op, rs, mcp, candidate,
744 sendok, mt->mt_nretries, 0 );
746 Debug( LDAP_DEBUG_ANY,
747 "%s meta_back_retry[%d]: "
748 "meta_back_single_dobind=%d\n",
749 op->o_log_prefix, candidate, rc );
750 if ( rc == LDAP_SUCCESS ) {
751 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
752 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
754 LDAP_BACK_CONN_ISBOUND_SET( msc );
757 LDAP_BACK_CONN_ISANON_SET( msc );
760 /* when bound, dispose of the "binding" flag */
762 LDAP_BACK_CONN_BINDING_CLEAR( msc );
767 /* don't send twice */
768 sendok &= ~LDAP_BACK_SENDERR;
771 if ( rc != LDAP_SUCCESS ) {
772 SlapReply *candidates = meta_back_candidates_get( op );
774 candidates[ candidate ].sr_err = rc;
776 if ( *mcp != NULL ) {
777 if ( mc->mc_refcnt == 1 ) {
779 LDAP_BACK_CONN_BINDING_CLEAR( msc );
781 (void)meta_clear_one_candidate( op, mc, candidate );
784 LDAP_BACK_CONN_TAINTED_SET( mc );
785 /* only release if mandatory; otherwise
786 * let the caller do what's best before
788 if ( META_BACK_ONERR_STOP( mi ) ) {
789 meta_back_release_conn_lock( mi, mc, 0 );
793 #if META_BACK_PRINT_CONNTREE > 0
794 meta_back_print_conntree( mi, ">>> meta_back_retry" );
795 #endif /* META_BACK_PRINT_CONNTREE */
797 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
798 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
799 if ( mc->mc_q.tqe_prev != NULL ) {
800 assert( LDAP_BACK_CONN_CACHED( mc ) );
801 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
802 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
804 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
805 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
808 assert( !LDAP_BACK_CONN_CACHED( mc ) );
812 /* FIXME: check if in tree, for consistency? */
813 (void)avl_delete( &mi->mi_conninfo.lai_tree,
814 ( caddr_t )mc, meta_back_conndnmc_cmp );
816 LDAP_BACK_CONN_CACHED_CLEAR( mc );
818 #if META_BACK_PRINT_CONNTREE > 0
819 meta_back_print_conntree( mi, "<<< meta_back_retry" );
820 #endif /* META_BACK_PRINT_CONNTREE */
824 if ( sendok & LDAP_BACK_SENDERR ) {
826 rs->sr_text = "Unable to retry";
827 send_ldap_result( op, rs );
831 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
832 meta_back_quarantine( op, rs, candidate );
835 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
837 return rc == LDAP_SUCCESS ? 1 : 0;
841 * callback for unique candidate selection
844 meta_back_conn_cb( Operation *op, SlapReply *rs )
846 assert( op->o_tag == LDAP_REQ_SEARCH );
848 switch ( rs->sr_type ) {
850 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
866 meta_back_get_candidate(
871 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
875 * tries to get a unique candidate
876 * (takes care of default target)
878 candidate = meta_back_select_unique_candidate( mi, ndn );
881 * if any is found, inits the connection
883 if ( candidate == META_TARGET_NONE ) {
884 rs->sr_err = LDAP_NO_SUCH_OBJECT;
885 rs->sr_text = "No suitable candidate target found";
887 } else if ( candidate == META_TARGET_MULTIPLE ) {
889 SlapReply rs2 = { 0 };
890 slap_callback cb2 = { 0 };
893 /* try to get a unique match for the request ndn
894 * among the multiple candidates available */
895 op2.o_tag = LDAP_REQ_SEARCH;
897 op2.o_req_ndn = *ndn;
898 op2.ors_scope = LDAP_SCOPE_BASE;
899 op2.ors_deref = LDAP_DEREF_NEVER;
900 op2.ors_attrs = slap_anlist_no_attrs;
901 op2.ors_attrsonly = 0;
902 op2.ors_limit = NULL;
904 op2.ors_tlimit = SLAP_NO_LIMIT;
906 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
907 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
909 op2.o_callback = &cb2;
910 cb2.sc_response = meta_back_conn_cb;
911 cb2.sc_private = (void *)&candidate;
913 rc = op->o_bd->be_search( &op2, &rs2 );
915 switch ( rs2.sr_err ) {
918 rs->sr_err = rs2.sr_err;
921 case LDAP_SIZELIMIT_EXCEEDED:
922 /* if multiple candidates can serve the operation,
923 * and a default target is defined, and it is
924 * a candidate, try using it (FIXME: YMMV) */
925 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
926 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
927 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
929 candidate = mi->mi_defaulttarget;
930 rs->sr_err = LDAP_SUCCESS;
934 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
935 rs->sr_text = "Unable to select unique candidate target";
941 rs->sr_err = LDAP_SUCCESS;
947 static void *meta_back_candidates_dummy;
950 meta_back_candidates_keyfree(
954 metacandidates_t *mc = (metacandidates_t *)data;
956 ber_memfree_x( mc->mc_candidates, NULL );
957 ber_memfree_x( data, NULL );
961 meta_back_candidates_get( Operation *op )
963 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
964 metacandidates_t *mc;
966 if ( op->o_threadctx ) {
969 ldap_pvt_thread_pool_getkey( op->o_threadctx,
970 &meta_back_candidates_dummy, &data, NULL );
971 mc = (metacandidates_t *)data;
974 mc = mi->mi_candidates;
978 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
979 mc->mc_ntargets = mi->mi_ntargets;
980 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
981 if ( op->o_threadctx ) {
985 ldap_pvt_thread_pool_setkey( op->o_threadctx,
986 &meta_back_candidates_dummy, data,
987 meta_back_candidates_keyfree,
991 mi->mi_candidates = mc;
994 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
995 /* NOTE: in the future, may want to allow back-config
996 * to add/remove targets from back-meta... */
997 mc->mc_candidates = ch_realloc( mc->mc_candidates,
998 sizeof( SlapReply ) * mi->mi_ntargets );
999 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1000 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1001 mc->mc_ntargets = mi->mi_ntargets;
1004 return mc->mc_candidates;
1010 * Prepares the connection structure
1014 * - determine what DN is being requested:
1016 * op requires candidate checks
1018 * add unique parent of o_req_ndn
1019 * bind unique^*[/all] o_req_ndn [no check]
1020 * compare unique^+ o_req_ndn
1021 * delete unique o_req_ndn
1022 * modify unique o_req_ndn
1023 * search any o_req_ndn
1024 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1026 * - for ops that require the candidate to be unique, in case of multiple
1027 * occurrences an internal search with sizeLimit=1 is performed
1028 * if a unique candidate can actually be determined. If none is found,
1029 * the operation aborts; if multiple are found, the default target
1030 * is used if defined and candidate; otherwise the operation aborts.
1032 * *^note: actually, the bind operation is handled much like a search;
1033 * i.e. the bind is broadcast to all candidate targets.
1035 * +^note: actually, the compare operation is handled much like a search;
1036 * i.e. the compare is broadcast to all candidate targets, while checking
1037 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1045 ldap_back_send_t sendok )
1047 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1048 metaconn_t *mc = NULL,
1050 int cached = META_TARGET_NONE,
1051 i = META_TARGET_NONE,
1057 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1061 META_DNTYPE_NEWPARENT
1062 } dn_type = META_DNTYPE_ENTRY;
1063 struct berval ndn = op->o_req_ndn,
1066 SlapReply *candidates = meta_back_candidates_get( op );
1068 /* Internal searches are privileged and shared. So is root. */
1069 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1070 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1071 || op->o_do_not_cache || be_isroot( op ) )
1073 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1074 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1075 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1077 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1079 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1080 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1081 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1084 mc_curr.mc_local_ndn = op->o_ndn;
1086 /* Explicit binds must not be shared */
1087 if ( !BER_BVISEMPTY( &op->o_ndn )
1088 || op->o_tag == LDAP_REQ_BIND
1089 || SLAP_IS_AUTHZ_BACKEND( op ) )
1091 mc_curr.mc_conn = op->o_conn;
1094 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1095 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1099 /* Explicit Bind requests always get their own conn */
1100 if ( sendok & LDAP_BACK_BINDING ) {
1101 mc_curr.mc_conn = op->o_conn;
1104 /* Searches for a metaconn in the avl tree */
1106 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1107 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1108 /* lookup a conn that's not binding */
1109 LDAP_TAILQ_FOREACH( mc,
1110 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1113 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1119 /* move to tail of queue */
1120 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1121 metaconn_t, mc_q ) )
1123 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1125 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1126 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1130 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1131 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1133 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1138 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1139 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1143 /* catch taint errors */
1144 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1146 /* Don't reuse connections while they're still binding
1147 * NOTE: only makes sense for binds */
1148 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1149 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1150 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1152 ldap_pvt_thread_yield();
1156 /* release conn, and create a temporary */
1160 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1161 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
1163 #if META_BACK_PRINT_CONNTREE > 0
1164 meta_back_print_conntree( mi,
1165 ">>> meta_back_getconn(expired)" );
1166 #endif /* META_BACK_PRINT_CONNTREE */
1168 /* don't let anyone else use this expired connection */
1169 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1170 if ( mc->mc_q.tqe_prev != NULL ) {
1171 assert( LDAP_BACK_CONN_CACHED( mc ) );
1172 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1173 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1175 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1176 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1179 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1183 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1184 (caddr_t)mc, meta_back_conndnmc_cmp );
1187 #if META_BACK_PRINT_CONNTREE > 0
1188 meta_back_print_conntree( mi,
1189 "<<< meta_back_getconn(expired)" );
1190 #endif /* META_BACK_PRINT_CONNTREE */
1191 LDAP_BACK_CONN_TAINTED_SET( mc );
1192 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1194 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1195 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1196 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1198 Debug( LDAP_DEBUG_TRACE,
1199 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1200 op->o_log_prefix, (void *)mc, buf );
1207 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1210 switch ( op->o_tag ) {
1212 /* if we go to selection, the entry must not exist,
1213 * and we must be able to resolve the parent */
1214 dn_type = META_DNTYPE_PARENT;
1215 dnParent( &ndn, &pndn );
1218 case LDAP_REQ_MODRDN:
1219 /* if nnewSuperior is not NULL, it must resolve
1220 * to the same candidate as the req_ndn */
1221 if ( op->orr_nnewSup ) {
1222 dn_type = META_DNTYPE_NEWPARENT;
1227 /* if bound as rootdn, the backend must bind to all targets
1228 * with the administrative identity
1229 * (unless pseoudoroot-bind-defer is TRUE) */
1230 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1231 op_type = META_OP_REQUIRE_ALL;
1235 case LDAP_REQ_COMPARE:
1236 case LDAP_REQ_DELETE:
1237 case LDAP_REQ_MODIFY:
1238 /* just a unique candidate */
1241 case LDAP_REQ_SEARCH:
1242 /* allow multiple candidates for the searchBase */
1243 op_type = META_OP_ALLOW_MULTIPLE;
1247 /* right now, just break (exop?) */
1252 * require all connections ...
1254 if ( op_type == META_OP_REQUIRE_ALL ) {
1256 /* Looks like we didn't get a bind. Open a new session... */
1258 assert( new_conn == 0 );
1259 mc = metaconn_alloc( op );
1260 mc->mc_conn = mc_curr.mc_conn;
1261 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1263 if ( sendok & LDAP_BACK_BINDING ) {
1264 LDAP_BACK_CONN_BINDING_SET( mc );
1266 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1267 LDAP_BACK_CONN_ISPRIV_SET( mc );
1269 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1270 LDAP_BACK_CONN_ISANON_SET( mc );
1274 /* TODO: if any of the connections is binding,
1275 * release mc and create a new one */
1278 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1280 * The target is activated; if needed, it is
1283 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1284 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1285 LDAP_BACK_DONTSEND, !new_conn );
1286 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1287 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1288 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1290 META_CANDIDATE_SET( &candidates[ i ] );
1296 * FIXME: in case one target cannot
1297 * be init'd, should the other ones
1300 META_CANDIDATE_RESET( &candidates[ i ] );
1301 err = candidates[ i ].sr_err;
1306 if ( ncandidates == 0 ) {
1309 meta_back_conn_free( mc );
1312 meta_back_release_conn( mi, mc );
1315 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1316 rs->sr_text = "Unable to select valid candidates";
1318 if ( sendok & LDAP_BACK_SENDERR ) {
1319 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1320 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1322 send_ldap_result( op, rs );
1323 rs->sr_matched = NULL;
1333 * looks in cache, if any
1335 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1336 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1339 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1340 metatarget_t *mt = NULL;
1341 metasingleconn_t *msc = NULL;
1345 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1346 META_CANDIDATE_RESET( &candidates[ j ] );
1350 * tries to get a unique candidate
1351 * (takes care of default target)
1353 if ( i == META_TARGET_NONE ) {
1354 i = meta_back_get_candidate( op, rs, &ndn );
1356 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1357 i = meta_back_get_candidate( op, rs, &pndn );
1360 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1362 meta_back_release_conn( mi, mc );
1365 if ( sendok & LDAP_BACK_SENDERR ) {
1366 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1367 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1369 send_ldap_result( op, rs );
1370 rs->sr_matched = NULL;
1377 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1380 meta_back_release_conn( mi, mc );
1383 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1384 rs->sr_text = "Cross-target rename not supported";
1385 if ( sendok & LDAP_BACK_SENDERR ) {
1386 send_ldap_result( op, rs );
1392 Debug( LDAP_DEBUG_TRACE,
1393 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1394 i, op->o_req_ndn.bv_val, 0 );
1397 /* Retries searching for a metaconn in the avl tree
1398 * the reason is that the connection might have been
1399 * created by meta_back_get_candidate() */
1400 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1402 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1403 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1404 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1406 /* catch taint errors */
1407 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1409 /* Don't reuse connections while they're still binding */
1410 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1411 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1413 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1414 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1415 ldap_pvt_thread_yield();
1425 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1428 /* Looks like we didn't get a bind. Open a new session... */
1430 assert( new_conn == 0 );
1431 mc = metaconn_alloc( op );
1432 mc->mc_conn = mc_curr.mc_conn;
1433 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1435 if ( sendok & LDAP_BACK_BINDING ) {
1436 LDAP_BACK_CONN_BINDING_SET( mc );
1438 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1439 LDAP_BACK_CONN_ISPRIV_SET( mc );
1441 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1442 LDAP_BACK_CONN_ISANON_SET( mc );
1448 * Clear all other candidates
1450 ( void )meta_clear_unused_candidates( op, i );
1452 mt = mi->mi_targets[ i ];
1453 msc = &mc->mc_conns[ i ];
1456 * The target is activated; if needed, it is
1457 * also init'd. In case of error, meta_back_init_one_conn
1458 * sends the appropriate result.
1460 err = meta_back_init_one_conn( op, rs, mc, i,
1461 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1462 if ( err != LDAP_SUCCESS ) {
1464 * FIXME: in case one target cannot
1465 * be init'd, should the other ones
1468 META_CANDIDATE_RESET( &candidates[ i ] );
1471 meta_back_conn_free( mc );
1474 meta_back_release_conn( mi, mc );
1479 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1480 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1483 candidates[ i ].sr_err = LDAP_SUCCESS;
1484 META_CANDIDATE_SET( &candidates[ i ] );
1492 * if no unique candidate ...
1496 /* Looks like we didn't get a bind. Open a new session... */
1498 assert( new_conn == 0 );
1499 mc = metaconn_alloc( op );
1500 mc->mc_conn = mc_curr.mc_conn;
1501 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1503 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1504 LDAP_BACK_CONN_ISPRIV_SET( mc );
1506 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1507 LDAP_BACK_CONN_ISANON_SET( mc );
1511 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1512 metatarget_t *mt = mi->mi_targets[ i ];
1514 META_CANDIDATE_RESET( &candidates[ i ] );
1517 || meta_back_is_candidate( mt, &op->o_req_ndn,
1518 LDAP_SCOPE_SUBTREE ) )
1522 * The target is activated; if needed, it is
1525 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1526 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1527 LDAP_BACK_DONTSEND, !new_conn );
1528 candidates[ i ].sr_err = lerr;
1529 if ( lerr == LDAP_SUCCESS ) {
1530 META_CANDIDATE_SET( &candidates[ i ] );
1533 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1534 op->o_log_prefix, i, 0 );
1536 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1537 META_CANDIDATE_SET( &candidates[ i ] );
1539 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1540 op->o_log_prefix, i,
1541 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1546 * FIXME: in case one target cannot
1547 * be init'd, should the other ones
1551 ( void )meta_clear_one_candidate( op, mc, i );
1553 /* leave the target candidate, but record the error for later use */
1556 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1557 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1558 op->o_log_prefix, i, lerr );
1561 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1562 op->o_log_prefix, i, lerr );
1565 if ( META_BACK_ONERR_STOP( mi ) ) {
1566 if ( sendok & LDAP_BACK_SENDERR ) {
1567 send_ldap_result( op, rs );
1571 meta_back_conn_free( mc );
1574 meta_back_release_conn( mi, mc );
1585 ( void )meta_clear_one_candidate( op, mc, i );
1590 if ( ncandidates == 0 ) {
1593 meta_back_conn_free( mc );
1596 meta_back_release_conn( mi, mc );
1599 if ( rs->sr_err == LDAP_SUCCESS ) {
1600 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1601 rs->sr_text = "Unable to select valid candidates";
1604 if ( sendok & LDAP_BACK_SENDERR ) {
1605 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1606 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1608 send_ldap_result( op, rs );
1609 rs->sr_matched = NULL;
1617 /* clear out meta_back_init_one_conn non-fatal errors */
1618 rs->sr_err = LDAP_SUCCESS;
1621 /* touch the timestamp */
1622 if ( mi->mi_idle_timeout != 0 ) {
1623 mc->mc_time = op->o_time;
1627 if ( mi->mi_conn_ttl ) {
1628 mc->mc_create_time = op->o_time;
1632 * Inserts the newly created metaconn in the avl tree
1634 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1635 #if META_BACK_PRINT_CONNTREE > 0
1636 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1637 #endif /* META_BACK_PRINT_CONNTREE */
1640 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1641 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1642 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1643 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1644 LDAP_BACK_CONN_CACHED_SET( mc );
1647 LDAP_BACK_CONN_TAINTED_SET( mc );
1651 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1652 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1653 meta_back_conndn_cmp, meta_back_conndn_dup );
1654 LDAP_BACK_CONN_CACHED_SET( mc );
1657 #if META_BACK_PRINT_CONNTREE > 0
1658 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1659 #endif /* META_BACK_PRINT_CONNTREE */
1660 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1662 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1664 * Err could be -1 in case a duplicate metaconn is inserted
1671 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1672 /* duplicate: free and try to get the newly created one */
1673 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1675 meta_back_conn_free( mc );
1681 LDAP_BACK_CONN_TAINTED_SET( mc );
1685 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1686 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1687 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1688 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1690 Debug( LDAP_DEBUG_ANY,
1691 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1692 op->o_log_prefix, ncandidates, buf );
1696 meta_back_conn_free( mc );
1698 rs->sr_err = LDAP_OTHER;
1699 rs->sr_text = "Proxy bind collision";
1700 if ( sendok & LDAP_BACK_SENDERR ) {
1701 send_ldap_result( op, rs );
1707 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1708 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1709 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1711 Debug( LDAP_DEBUG_TRACE,
1712 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1713 op->o_log_prefix, ncandidates, buf );
1717 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1718 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1719 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1721 Debug( LDAP_DEBUG_TRACE,
1722 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1723 op->o_log_prefix, ncandidates, buf );
1731 meta_back_release_conn_lock(
1736 assert( mc != NULL );
1739 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1741 assert( mc->mc_refcnt > 0 );
1743 /* NOTE: the connection is removed if either it is tainted
1744 * or if it is shared and no one else is using it. This needs
1745 * to occur because for intrinsic reasons cached connections
1746 * that are not privileged would live forever and pollute
1747 * the connection space (and eat up resources). Maybe this
1748 * should be configurable... */
1749 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1750 #if META_BACK_PRINT_CONNTREE > 0
1751 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1752 #endif /* META_BACK_PRINT_CONNTREE */
1754 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1755 if ( mc->mc_q.tqe_prev != NULL ) {
1756 assert( LDAP_BACK_CONN_CACHED( mc ) );
1757 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1758 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1759 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1760 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1763 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1766 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1769 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1770 ( caddr_t )mc, meta_back_conndnmc_cmp );
1772 /* Overparanoid, but useful... */
1773 assert( tmpmc == NULL || tmpmc == mc );
1776 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1778 #if META_BACK_PRINT_CONNTREE > 0
1779 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1780 #endif /* META_BACK_PRINT_CONNTREE */
1782 if ( mc->mc_refcnt == 0 ) {
1783 meta_back_conn_free( mc );
1788 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1789 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1793 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1798 meta_back_quarantine(
1803 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1804 metatarget_t *mt = mi->mi_targets[ candidate ];
1806 slap_retry_info_t *ri = &mt->mt_quarantine;
1808 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1810 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1811 time_t new_last = slap_get_time();
1813 switch ( mt->mt_isquarantined ) {
1814 case LDAP_BACK_FQ_NO:
1815 if ( ri->ri_last == new_last ) {
1819 Debug( LDAP_DEBUG_ANY,
1820 "%s meta_back_quarantine[%d]: enter.\n",
1821 op->o_log_prefix, candidate, 0 );
1827 case LDAP_BACK_FQ_RETRYING:
1828 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1829 char buf[ SLAP_TEXT_BUFLEN ];
1831 snprintf( buf, sizeof( buf ),
1832 "meta_back_quarantine[%d]: block #%d try #%d failed",
1833 candidate, ri->ri_idx, ri->ri_count );
1834 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1835 op->o_log_prefix, buf, 0 );
1839 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1840 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1851 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1852 ri->ri_last = new_last;
1854 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1855 Debug( LDAP_DEBUG_ANY,
1856 "%s meta_back_quarantine[%d]: exit.\n",
1857 op->o_log_prefix, candidate, 0 );
1859 if ( mi->mi_quarantine_f ) {
1860 (void)mi->mi_quarantine_f( mi, candidate,
1861 mi->mi_quarantine_p );
1866 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1870 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );