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;
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 msc->msc_cred = save_cred;
729 } else if ( !BER_BVISNULL( &save_cred ) ) {
730 memset( save_cred.bv_val, 0, save_cred.bv_len );
731 ber_memfree( save_cred.bv_val );
734 /* restore the "binding" flag, in case */
736 LDAP_BACK_CONN_BINDING_SET( msc );
739 if ( rc == LDAP_SUCCESS ) {
741 rc = meta_back_single_dobind( op, rs, mcp, candidate,
742 sendok, mt->mt_nretries, 0 );
744 Debug( LDAP_DEBUG_ANY,
745 "%s meta_back_retry[%d]: "
746 "meta_back_single_dobind=%d\n",
747 op->o_log_prefix, candidate, rc );
748 if ( rc == LDAP_SUCCESS ) {
749 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
750 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
752 LDAP_BACK_CONN_ISBOUND_SET( msc );
755 LDAP_BACK_CONN_ISANON_SET( msc );
758 /* when bound, dispose of the "binding" flag */
760 LDAP_BACK_CONN_BINDING_CLEAR( msc );
765 /* don't send twice */
766 sendok &= ~LDAP_BACK_SENDERR;
769 if ( rc != LDAP_SUCCESS ) {
770 SlapReply *candidates = meta_back_candidates_get( op );
772 candidates[ candidate ].sr_err = rc;
774 if ( *mcp != NULL ) {
775 if ( mc->mc_refcnt == 1 ) {
777 LDAP_BACK_CONN_BINDING_CLEAR( msc );
779 (void)meta_clear_one_candidate( op, mc, candidate );
782 LDAP_BACK_CONN_TAINTED_SET( mc );
783 /* only release if mandatory; otherwise
784 * let the caller do what's best before
786 if ( META_BACK_ONERR_STOP( mi ) ) {
787 meta_back_release_conn_lock( mi, mc, 0 );
791 #if META_BACK_PRINT_CONNTREE > 0
792 meta_back_print_conntree( mi, ">>> meta_back_retry" );
793 #endif /* META_BACK_PRINT_CONNTREE */
795 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
796 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
797 if ( mc->mc_q.tqe_prev != NULL ) {
798 assert( LDAP_BACK_CONN_CACHED( mc ) );
799 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
800 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
802 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
803 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
806 assert( !LDAP_BACK_CONN_CACHED( mc ) );
810 /* FIXME: check if in tree, for consistency? */
811 (void)avl_delete( &mi->mi_conninfo.lai_tree,
812 ( caddr_t )mc, meta_back_conndnmc_cmp );
814 LDAP_BACK_CONN_CACHED_CLEAR( mc );
816 #if META_BACK_PRINT_CONNTREE > 0
817 meta_back_print_conntree( mi, "<<< meta_back_retry" );
818 #endif /* META_BACK_PRINT_CONNTREE */
822 if ( sendok & LDAP_BACK_SENDERR ) {
824 rs->sr_text = "Unable to retry";
825 send_ldap_result( op, rs );
829 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
830 meta_back_quarantine( op, rs, candidate );
833 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
835 return rc == LDAP_SUCCESS ? 1 : 0;
839 * callback for unique candidate selection
842 meta_back_conn_cb( Operation *op, SlapReply *rs )
844 assert( op->o_tag == LDAP_REQ_SEARCH );
846 switch ( rs->sr_type ) {
848 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
864 meta_back_get_candidate(
869 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
873 * tries to get a unique candidate
874 * (takes care of default target)
876 candidate = meta_back_select_unique_candidate( mi, ndn );
879 * if any is found, inits the connection
881 if ( candidate == META_TARGET_NONE ) {
882 rs->sr_err = LDAP_NO_SUCH_OBJECT;
883 rs->sr_text = "No suitable candidate target found";
885 } else if ( candidate == META_TARGET_MULTIPLE ) {
887 SlapReply rs2 = { 0 };
888 slap_callback cb2 = { 0 };
891 /* try to get a unique match for the request ndn
892 * among the multiple candidates available */
893 op2.o_tag = LDAP_REQ_SEARCH;
895 op2.o_req_ndn = *ndn;
896 op2.ors_scope = LDAP_SCOPE_BASE;
897 op2.ors_deref = LDAP_DEREF_NEVER;
898 op2.ors_attrs = slap_anlist_no_attrs;
899 op2.ors_attrsonly = 0;
900 op2.ors_limit = NULL;
902 op2.ors_tlimit = SLAP_NO_LIMIT;
904 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
905 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
907 op2.o_callback = &cb2;
908 cb2.sc_response = meta_back_conn_cb;
909 cb2.sc_private = (void *)&candidate;
911 rc = op->o_bd->be_search( &op2, &rs2 );
913 switch ( rs2.sr_err ) {
916 rs->sr_err = rs2.sr_err;
919 case LDAP_SIZELIMIT_EXCEEDED:
920 /* if multiple candidates can serve the operation,
921 * and a default target is defined, and it is
922 * a candidate, try using it (FIXME: YMMV) */
923 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
924 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
925 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
927 candidate = mi->mi_defaulttarget;
928 rs->sr_err = LDAP_SUCCESS;
932 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
933 rs->sr_text = "Unable to select unique candidate target";
939 rs->sr_err = LDAP_SUCCESS;
945 static void *meta_back_candidates_dummy;
948 meta_back_candidates_keyfree(
952 metacandidates_t *mc = (metacandidates_t *)data;
954 ber_memfree_x( mc->mc_candidates, NULL );
955 ber_memfree_x( data, NULL );
959 meta_back_candidates_get( Operation *op )
961 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
962 metacandidates_t *mc;
964 if ( op->o_threadctx ) {
967 ldap_pvt_thread_pool_getkey( op->o_threadctx,
968 &meta_back_candidates_dummy, &data, NULL );
969 mc = (metacandidates_t *)data;
972 mc = mi->mi_candidates;
976 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
977 mc->mc_ntargets = mi->mi_ntargets;
978 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
979 if ( op->o_threadctx ) {
983 ldap_pvt_thread_pool_setkey( op->o_threadctx,
984 &meta_back_candidates_dummy, data,
985 meta_back_candidates_keyfree,
989 mi->mi_candidates = mc;
992 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
993 /* NOTE: in the future, may want to allow back-config
994 * to add/remove targets from back-meta... */
995 mc->mc_candidates = ch_realloc( mc->mc_candidates,
996 sizeof( SlapReply ) * mi->mi_ntargets );
997 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
998 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
999 mc->mc_ntargets = mi->mi_ntargets;
1002 return mc->mc_candidates;
1008 * Prepares the connection structure
1012 * - determine what DN is being requested:
1014 * op requires candidate checks
1016 * add unique parent of o_req_ndn
1017 * bind unique^*[/all] o_req_ndn [no check]
1018 * compare unique^+ o_req_ndn
1019 * delete unique o_req_ndn
1020 * modify unique o_req_ndn
1021 * search any o_req_ndn
1022 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1024 * - for ops that require the candidate to be unique, in case of multiple
1025 * occurrences an internal search with sizeLimit=1 is performed
1026 * if a unique candidate can actually be determined. If none is found,
1027 * the operation aborts; if multiple are found, the default target
1028 * is used if defined and candidate; otherwise the operation aborts.
1030 * *^note: actually, the bind operation is handled much like a search;
1031 * i.e. the bind is broadcast to all candidate targets.
1033 * +^note: actually, the compare operation is handled much like a search;
1034 * i.e. the compare is broadcast to all candidate targets, while checking
1035 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1043 ldap_back_send_t sendok )
1045 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1046 metaconn_t *mc = NULL,
1048 int cached = META_TARGET_NONE,
1049 i = META_TARGET_NONE,
1055 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1059 META_DNTYPE_NEWPARENT
1060 } dn_type = META_DNTYPE_ENTRY;
1061 struct berval ndn = op->o_req_ndn,
1064 SlapReply *candidates = meta_back_candidates_get( op );
1066 /* Internal searches are privileged and shared. So is root. */
1067 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1068 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1069 || op->o_do_not_cache || be_isroot( op ) )
1071 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1072 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1073 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1075 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1077 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1078 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1079 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1082 mc_curr.mc_local_ndn = op->o_ndn;
1084 /* Explicit binds must not be shared */
1085 if ( !BER_BVISEMPTY( &op->o_ndn )
1086 || op->o_tag == LDAP_REQ_BIND
1087 || SLAP_IS_AUTHZ_BACKEND( op ) )
1089 mc_curr.mc_conn = op->o_conn;
1092 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1093 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1097 /* Explicit Bind requests always get their own conn */
1098 if ( sendok & LDAP_BACK_BINDING ) {
1099 mc_curr.mc_conn = op->o_conn;
1102 /* Searches for a metaconn in the avl tree */
1104 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1105 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1106 /* lookup a conn that's not binding */
1107 LDAP_TAILQ_FOREACH( mc,
1108 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1111 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1117 /* move to tail of queue */
1118 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1119 metaconn_t, mc_q ) )
1121 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1123 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1124 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1128 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1129 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1131 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1136 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1137 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1141 /* catch taint errors */
1142 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1144 /* Don't reuse connections while they're still binding
1145 * NOTE: only makes sense for binds */
1146 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1147 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1148 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1150 ldap_pvt_thread_yield();
1154 /* release conn, and create a temporary */
1158 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1159 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
1161 #if META_BACK_PRINT_CONNTREE > 0
1162 meta_back_print_conntree( mi,
1163 ">>> meta_back_getconn(expired)" );
1164 #endif /* META_BACK_PRINT_CONNTREE */
1166 /* don't let anyone else use this expired connection */
1167 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1168 if ( mc->mc_q.tqe_prev != NULL ) {
1169 assert( LDAP_BACK_CONN_CACHED( mc ) );
1170 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1171 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1173 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1174 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1177 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1181 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1182 (caddr_t)mc, meta_back_conndnmc_cmp );
1185 #if META_BACK_PRINT_CONNTREE > 0
1186 meta_back_print_conntree( mi,
1187 "<<< meta_back_getconn(expired)" );
1188 #endif /* META_BACK_PRINT_CONNTREE */
1189 LDAP_BACK_CONN_TAINTED_SET( mc );
1190 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1192 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1193 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1194 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1196 Debug( LDAP_DEBUG_TRACE,
1197 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1198 op->o_log_prefix, (void *)mc, buf );
1205 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1208 switch ( op->o_tag ) {
1210 /* if we go to selection, the entry must not exist,
1211 * and we must be able to resolve the parent */
1212 dn_type = META_DNTYPE_PARENT;
1213 dnParent( &ndn, &pndn );
1216 case LDAP_REQ_MODRDN:
1217 /* if nnewSuperior is not NULL, it must resolve
1218 * to the same candidate as the req_ndn */
1219 if ( op->orr_nnewSup ) {
1220 dn_type = META_DNTYPE_NEWPARENT;
1225 /* if bound as rootdn, the backend must bind to all targets
1226 * with the administrative identity
1227 * (unless pseoudoroot-bind-defer is TRUE) */
1228 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1229 op_type = META_OP_REQUIRE_ALL;
1233 case LDAP_REQ_COMPARE:
1234 case LDAP_REQ_DELETE:
1235 case LDAP_REQ_MODIFY:
1236 /* just a unique candidate */
1239 case LDAP_REQ_SEARCH:
1240 /* allow multiple candidates for the searchBase */
1241 op_type = META_OP_ALLOW_MULTIPLE;
1245 /* right now, just break (exop?) */
1250 * require all connections ...
1252 if ( op_type == META_OP_REQUIRE_ALL ) {
1254 /* Looks like we didn't get a bind. Open a new session... */
1256 assert( new_conn == 0 );
1257 mc = metaconn_alloc( op );
1258 mc->mc_conn = mc_curr.mc_conn;
1259 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1261 if ( sendok & LDAP_BACK_BINDING ) {
1262 LDAP_BACK_CONN_BINDING_SET( mc );
1264 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1265 LDAP_BACK_CONN_ISPRIV_SET( mc );
1267 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1268 LDAP_BACK_CONN_ISANON_SET( mc );
1272 /* TODO: if any of the connections is binding,
1273 * release mc and create a new one */
1276 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1278 * The target is activated; if needed, it is
1281 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1282 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1283 LDAP_BACK_DONTSEND, !new_conn );
1284 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1285 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1286 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1288 META_CANDIDATE_SET( &candidates[ i ] );
1294 * FIXME: in case one target cannot
1295 * be init'd, should the other ones
1298 META_CANDIDATE_RESET( &candidates[ i ] );
1299 err = candidates[ i ].sr_err;
1304 if ( ncandidates == 0 ) {
1307 meta_back_conn_free( mc );
1310 meta_back_release_conn( mi, mc );
1313 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1314 rs->sr_text = "Unable to select valid candidates";
1316 if ( sendok & LDAP_BACK_SENDERR ) {
1317 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1318 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1320 send_ldap_result( op, rs );
1321 rs->sr_matched = NULL;
1331 * looks in cache, if any
1333 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1334 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1337 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1338 metatarget_t *mt = NULL;
1339 metasingleconn_t *msc = NULL;
1343 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1344 META_CANDIDATE_RESET( &candidates[ j ] );
1348 * tries to get a unique candidate
1349 * (takes care of default target)
1351 if ( i == META_TARGET_NONE ) {
1352 i = meta_back_get_candidate( op, rs, &ndn );
1354 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1355 i = meta_back_get_candidate( op, rs, &pndn );
1358 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1360 meta_back_release_conn( mi, mc );
1363 if ( sendok & LDAP_BACK_SENDERR ) {
1364 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1365 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1367 send_ldap_result( op, rs );
1368 rs->sr_matched = NULL;
1375 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1378 meta_back_release_conn( mi, mc );
1381 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1382 rs->sr_text = "Cross-target rename not supported";
1383 if ( sendok & LDAP_BACK_SENDERR ) {
1384 send_ldap_result( op, rs );
1390 Debug( LDAP_DEBUG_TRACE,
1391 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1392 i, op->o_req_ndn.bv_val, 0 );
1395 /* Retries searching for a metaconn in the avl tree
1396 * the reason is that the connection might have been
1397 * created by meta_back_get_candidate() */
1398 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1400 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1401 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1402 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1404 /* catch taint errors */
1405 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1407 /* Don't reuse connections while they're still binding */
1408 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1409 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1411 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1412 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1413 ldap_pvt_thread_yield();
1423 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1426 /* Looks like we didn't get a bind. Open a new session... */
1428 assert( new_conn == 0 );
1429 mc = metaconn_alloc( op );
1430 mc->mc_conn = mc_curr.mc_conn;
1431 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1433 if ( sendok & LDAP_BACK_BINDING ) {
1434 LDAP_BACK_CONN_BINDING_SET( mc );
1436 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1437 LDAP_BACK_CONN_ISPRIV_SET( mc );
1439 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1440 LDAP_BACK_CONN_ISANON_SET( mc );
1446 * Clear all other candidates
1448 ( void )meta_clear_unused_candidates( op, i );
1450 mt = mi->mi_targets[ i ];
1451 msc = &mc->mc_conns[ i ];
1454 * The target is activated; if needed, it is
1455 * also init'd. In case of error, meta_back_init_one_conn
1456 * sends the appropriate result.
1458 err = meta_back_init_one_conn( op, rs, mc, i,
1459 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1460 if ( err != LDAP_SUCCESS ) {
1462 * FIXME: in case one target cannot
1463 * be init'd, should the other ones
1466 META_CANDIDATE_RESET( &candidates[ i ] );
1469 meta_back_conn_free( mc );
1472 meta_back_release_conn( mi, mc );
1477 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1478 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1481 candidates[ i ].sr_err = LDAP_SUCCESS;
1482 META_CANDIDATE_SET( &candidates[ i ] );
1490 * if no unique candidate ...
1494 /* Looks like we didn't get a bind. Open a new session... */
1496 assert( new_conn == 0 );
1497 mc = metaconn_alloc( op );
1498 mc->mc_conn = mc_curr.mc_conn;
1499 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1501 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1502 LDAP_BACK_CONN_ISPRIV_SET( mc );
1504 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1505 LDAP_BACK_CONN_ISANON_SET( mc );
1509 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1510 metatarget_t *mt = mi->mi_targets[ i ];
1512 META_CANDIDATE_RESET( &candidates[ i ] );
1515 || meta_back_is_candidate( mt, &op->o_req_ndn,
1516 LDAP_SCOPE_SUBTREE ) )
1520 * The target is activated; if needed, it is
1523 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1524 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1525 LDAP_BACK_DONTSEND, !new_conn );
1526 candidates[ i ].sr_err = lerr;
1527 if ( lerr == LDAP_SUCCESS ) {
1528 META_CANDIDATE_SET( &candidates[ i ] );
1531 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1532 op->o_log_prefix, i, 0 );
1534 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1535 META_CANDIDATE_SET( &candidates[ i ] );
1537 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1538 op->o_log_prefix, i,
1539 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1544 * FIXME: in case one target cannot
1545 * be init'd, should the other ones
1549 ( void )meta_clear_one_candidate( op, mc, i );
1551 /* leave the target candidate, but record the error for later use */
1554 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1555 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined err=%d\n",
1556 op->o_log_prefix, i, lerr );
1559 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed err=%d\n",
1560 op->o_log_prefix, i, lerr );
1563 if ( META_BACK_ONERR_STOP( mi ) ) {
1564 if ( sendok & LDAP_BACK_SENDERR ) {
1565 send_ldap_result( op, rs );
1569 meta_back_conn_free( mc );
1572 meta_back_release_conn( mi, mc );
1583 ( void )meta_clear_one_candidate( op, mc, i );
1588 if ( ncandidates == 0 ) {
1591 meta_back_conn_free( mc );
1594 meta_back_release_conn( mi, mc );
1597 if ( rs->sr_err == LDAP_SUCCESS ) {
1598 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1599 rs->sr_text = "Unable to select valid candidates";
1602 if ( sendok & LDAP_BACK_SENDERR ) {
1603 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1604 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1606 send_ldap_result( op, rs );
1607 rs->sr_matched = NULL;
1615 /* clear out meta_back_init_one_conn non-fatal errors */
1616 rs->sr_err = LDAP_SUCCESS;
1619 /* touch the timestamp */
1620 if ( mi->mi_idle_timeout != 0 ) {
1621 mc->mc_time = op->o_time;
1625 if ( mi->mi_conn_ttl ) {
1626 mc->mc_create_time = op->o_time;
1630 * Inserts the newly created metaconn in the avl tree
1632 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1633 #if META_BACK_PRINT_CONNTREE > 0
1634 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1635 #endif /* META_BACK_PRINT_CONNTREE */
1638 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1639 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1640 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1641 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1642 LDAP_BACK_CONN_CACHED_SET( mc );
1645 LDAP_BACK_CONN_TAINTED_SET( mc );
1649 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1650 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1651 meta_back_conndn_cmp, meta_back_conndn_dup );
1652 LDAP_BACK_CONN_CACHED_SET( mc );
1655 #if META_BACK_PRINT_CONNTREE > 0
1656 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1657 #endif /* META_BACK_PRINT_CONNTREE */
1658 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1660 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1662 * Err could be -1 in case a duplicate metaconn is inserted
1669 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1670 /* duplicate: free and try to get the newly created one */
1671 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1673 meta_back_conn_free( mc );
1679 LDAP_BACK_CONN_TAINTED_SET( mc );
1683 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1684 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1685 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1686 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1688 Debug( LDAP_DEBUG_ANY,
1689 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1690 op->o_log_prefix, ncandidates, buf );
1694 meta_back_conn_free( mc );
1696 rs->sr_err = LDAP_OTHER;
1697 rs->sr_text = "Proxy bind collision";
1698 if ( sendok & LDAP_BACK_SENDERR ) {
1699 send_ldap_result( op, rs );
1705 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1706 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1707 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1709 Debug( LDAP_DEBUG_TRACE,
1710 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1711 op->o_log_prefix, ncandidates, buf );
1715 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1716 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1717 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1719 Debug( LDAP_DEBUG_TRACE,
1720 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1721 op->o_log_prefix, ncandidates, buf );
1729 meta_back_release_conn_lock(
1734 assert( mc != NULL );
1737 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1739 assert( mc->mc_refcnt > 0 );
1741 /* NOTE: the connection is removed if either it is tainted
1742 * or if it is shared and no one else is using it. This needs
1743 * to occur because for intrinsic reasons cached connections
1744 * that are not privileged would live forever and pollute
1745 * the connection space (and eat up resources). Maybe this
1746 * should be configurable... */
1747 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1748 #if META_BACK_PRINT_CONNTREE > 0
1749 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1750 #endif /* META_BACK_PRINT_CONNTREE */
1752 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1753 if ( mc->mc_q.tqe_prev != NULL ) {
1754 assert( LDAP_BACK_CONN_CACHED( mc ) );
1755 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1756 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1757 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1758 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1761 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1764 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1767 tmpmc = avl_delete( &mi->mi_conninfo.lai_tree,
1768 ( caddr_t )mc, meta_back_conndnmc_cmp );
1770 /* Overparanoid, but useful... */
1771 assert( tmpmc == NULL || tmpmc == mc );
1774 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1776 #if META_BACK_PRINT_CONNTREE > 0
1777 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1778 #endif /* META_BACK_PRINT_CONNTREE */
1780 if ( mc->mc_refcnt == 0 ) {
1781 meta_back_conn_free( mc );
1786 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1787 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1791 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1796 meta_back_quarantine(
1801 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1802 metatarget_t *mt = mi->mi_targets[ candidate ];
1804 slap_retry_info_t *ri = &mt->mt_quarantine;
1806 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1808 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1809 time_t new_last = slap_get_time();
1811 switch ( mt->mt_isquarantined ) {
1812 case LDAP_BACK_FQ_NO:
1813 if ( ri->ri_last == new_last ) {
1817 Debug( LDAP_DEBUG_ANY,
1818 "%s meta_back_quarantine[%d]: enter.\n",
1819 op->o_log_prefix, candidate, 0 );
1825 case LDAP_BACK_FQ_RETRYING:
1826 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1827 char buf[ SLAP_TEXT_BUFLEN ];
1829 snprintf( buf, sizeof( buf ),
1830 "meta_back_quarantine[%d]: block #%d try #%d failed",
1831 candidate, ri->ri_idx, ri->ri_count );
1832 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1833 op->o_log_prefix, buf, 0 );
1837 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1838 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1849 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1850 ri->ri_last = new_last;
1852 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1853 Debug( LDAP_DEBUG_ANY,
1854 "%s meta_back_quarantine[%d]: exit.\n",
1855 op->o_log_prefix, candidate, 0 );
1857 if ( mi->mi_quarantine_f ) {
1858 (void)mi->mi_quarantine_f( mi, candidate,
1859 mi->mi_quarantine_p );
1864 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1868 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );