2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2006 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 * Set PRINT_CONNTREE larger than 0 to dump the connection tree (debug only)
40 #ifndef PRINT_CONNTREE
41 #define PRINT_CONNTREE 0
42 #endif /* !PRINT_CONNTREE */
45 * meta_back_conndn_cmp
47 * compares two struct metaconn based on the value of the conn pointer
48 * and of the local DN; used by avl stuff
55 metaconn_t *mc1 = ( metaconn_t * )c1;
56 metaconn_t *mc2 = ( metaconn_t * )c2;
59 /* If local DNs don't match, it is definitely not a match */
60 /* For shared sessions, conn is NULL. Only explicitly
61 * bound sessions will have non-NULL conn.
63 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
65 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
72 * meta_back_conndnmc_cmp
74 * compares two struct metaconn based on the value of the conn pointer,
75 * the local DN and the struct pointer; used by avl stuff
78 meta_back_conndnmc_cmp(
82 metaconn_t *mc1 = ( metaconn_t * )c1;
83 metaconn_t *mc2 = ( metaconn_t * )c2;
86 /* If local DNs don't match, it is definitely not a match */
87 /* For shared sessions, conn is NULL. Only explicitly
88 * bound sessions will have non-NULL conn.
90 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
92 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
94 rc = SLAP_PTRCMP( mc1, mc2 );
104 * compares two struct metaconn based on the value of the conn pointer;
112 metaconn_t *mc1 = ( metaconn_t * )c1;
113 metaconn_t *mc2 = ( metaconn_t * )c2;
115 /* For shared sessions, conn is NULL. Only explicitly
116 * bound sessions will have non-NULL conn.
118 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
122 * meta_back_conndn_dup
124 * returns -1 in case a duplicate struct metaconn has been inserted;
128 meta_back_conndn_dup(
132 metaconn_t *mc1 = ( metaconn_t * )c1;
133 metaconn_t *mc2 = ( metaconn_t * )c2;
135 /* Cannot have more than one shared session with same DN */
136 if ( mc1->mc_conn == mc2->mc_conn &&
137 dn_match( &mc1->mc_local_ndn, &mc2->mc_local_ndn ) )
146 * Debug stuff (got it from libavl)
148 #if PRINT_CONNTREE > 0
150 ravl_print( Avlnode *root, int depth )
159 ravl_print( root->avl_right, depth + 1 );
161 for ( i = 0; i < depth; i++ ) {
162 fprintf( stderr, "-" );
165 mc = (metaconn_t *)root->avl_data;
166 fprintf( stderr, "mc=%p local=\"%s\" conn=%p %s refcnt=%d\n",
168 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
170 avl_bf2str( root->avl_bf ), mc->mc_refcnt );
172 ravl_print( root->avl_left, depth + 1 );
176 myprint( Avlnode *root, char *msg )
178 fprintf( stderr, "========> %s\n", msg );
181 fprintf( stderr, "\tNULL\n" );
184 ravl_print( root, 0 );
187 fprintf( stderr, "<======== %s\n", msg );
189 #endif /* PRINT_CONNTREE */
197 * Allocates a connection structure, making room for all the referenced targets
203 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
205 int i, ntargets = mi->mi_ntargets;
207 assert( ntargets > 0 );
209 /* malloc all in one */
210 mc = ( metaconn_t * )ch_calloc( 1, sizeof( metaconn_t )
211 + sizeof( metasingleconn_t ) * ntargets );
216 for ( i = 0; i < ntargets; i++ ) {
217 mc->mc_conns[ i ].msc_info = mi;
220 mc->mc_authz_target = META_BOUND_NONE;
227 * meta_back_init_one_conn
229 * Initializes one connection
232 meta_back_init_one_conn(
238 ldap_back_send_t sendok )
240 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
241 metatarget_t *mt = mi->mi_targets[ candidate ];
242 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
245 int isauthz = ( candidate == mc->mc_authz_target );
248 #endif /* HAVE_TLS */
250 /* if the server is quarantined, and
251 * - the current interval did not expire yet, or
252 * - no more retries should occur,
253 * don't return the connection */
254 if ( mt->mt_isquarantined ) {
255 slap_retry_info_t *ri = &mt->mt_quarantine;
258 if ( mt->mt_isquarantined == LDAP_BACK_FQ_YES ) {
259 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
260 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
262 if ( LogTest( LDAP_DEBUG_ANY ) ) {
263 char buf[ SLAP_TEXT_BUFLEN ];
265 snprintf( buf, sizeof( buf ),
266 "meta_back_init_one_conn[%d]: quarantine "
267 "retry block #%d try #%d",
268 candidate, ri->ri_idx, ri->ri_count );
269 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
270 op->o_log_prefix, buf, 0 );
273 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
278 rs->sr_err = LDAP_UNAVAILABLE;
279 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
280 send_ldap_result( op, rs );
289 if ( msc->msc_ld != NULL ) {
290 return rs->sr_err = LDAP_SUCCESS;
293 msc->msc_mscflags = 0;
296 * Attempts to initialize the connection to the target ds
298 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
299 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
301 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
302 #endif /* HAVE_TLS */
303 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
304 if ( rs->sr_err != LDAP_SUCCESS ) {
309 * Set LDAP version. This will always succeed: If the client
310 * bound with a particular version, then so can we.
312 if ( mt->mt_version != 0 ) {
313 version = mt->mt_version;
315 } else if ( op->o_conn->c_protocol != 0 ) {
316 version = op->o_conn->c_protocol;
319 version = LDAP_VERSION3;
321 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
322 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
324 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
325 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
326 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
329 /* start TLS ("tls [try-]{start|propagate}" statement) */
330 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
333 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
335 * use asynchronous StartTLS; in case, chase referral
336 * FIXME: OpenLDAP does not return referral on StartTLS yet
340 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
341 if ( rs->sr_err == LDAP_SUCCESS ) {
342 LDAPMessage *res = NULL;
343 int rc, nretries = mt->mt_nretries;
346 LDAP_BACK_TV_SET( &tv );
349 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
351 rs->sr_err = LDAP_OTHER;
353 } else if ( rc == 0 ) {
354 if ( nretries != 0 ) {
355 if ( nretries > 0 ) {
358 LDAP_BACK_TV_SET( &tv );
361 rs->sr_err = LDAP_OTHER;
363 } else if ( rc == LDAP_RES_EXTENDED ) {
364 struct berval *data = NULL;
366 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
368 if ( rs->sr_err == LDAP_SUCCESS ) {
371 /* FIXME: matched? referrals? response controls? */
372 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
373 &err, NULL, NULL, NULL, NULL, 1 );
376 if ( rs->sr_err == LDAP_SUCCESS ) {
380 /* FIXME: in case a referral
381 * is returned, should we try
382 * using it instead of the
384 if ( rs->sr_err == LDAP_SUCCESS ) {
385 ldap_install_tls( msc->msc_ld );
387 } else if ( rs->sr_err == LDAP_REFERRAL ) {
388 rs->sr_err = LDAP_OTHER;
389 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
393 if ( data->bv_val ) {
394 ber_memfree( data->bv_val );
401 rs->sr_err = LDAP_OTHER;
408 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
410 * use synchronous StartTLS
412 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
413 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
415 /* if StartTLS is requested, only attempt it if the URL
416 * is not "ldaps://"; this may occur not only in case
417 * of misconfiguration, but also when used in the chain
418 * overlay, where the "uri" can be parsed out of a referral */
419 if ( rs->sr_err == LDAP_SERVER_DOWN
420 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
422 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
427 #endif /* HAVE_TLS */
430 * Set the network timeout if set
432 if ( mt->mt_network_timeout != 0 ) {
433 struct timeval network_timeout;
435 network_timeout.tv_usec = 0;
436 network_timeout.tv_sec = mt->mt_network_timeout;
438 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
439 (void *)&network_timeout );
443 * If the connection DN is not null, an attempt to rewrite it is made
447 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
448 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
449 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
450 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
454 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
457 LDAP_BACK_CONN_ISPRIV_SET( msc );
460 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
461 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
462 ber_memfree_x( msc->msc_cred.bv_val, NULL );
463 BER_BVZERO( &msc->msc_cred );
465 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
466 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
467 BER_BVZERO( &msc->msc_bound_ndn );
469 if ( !BER_BVISEMPTY( &op->o_ndn )
470 && SLAP_IS_AUTHZ_BACKEND( op )
474 dc.conn = op->o_conn;
479 * Rewrite the bind dn if needed
481 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
482 &msc->msc_bound_ndn ) )
484 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
489 /* copy the DN if needed */
490 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
491 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
495 ber_dupbv( &msc->msc_bound_ndn, &slap_empty_bv );
499 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
502 if ( rs->sr_err == LDAP_SUCCESS ) {
504 * Sets a cookie for the rewrite session
506 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
509 rs->sr_err = slap_map_api2result( rs );
510 if ( sendok & LDAP_BACK_SENDERR ) {
511 send_ldap_result( op, rs );
522 * Retries one connection
530 ldap_back_send_t sendok )
532 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
533 metatarget_t *mt = mi->mi_targets[ candidate ];
534 metaconn_t *mc = *mcp;
535 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
536 int rc = LDAP_UNAVAILABLE,
537 binding = LDAP_BACK_CONN_BINDING( msc );
539 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
541 assert( mc->mc_refcnt > 0 );
542 if ( mc->mc_refcnt == 1 ) {
543 if ( LogTest( LDAP_DEBUG_ANY ) ) {
544 char buf[ SLAP_TEXT_BUFLEN ];
546 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
547 snprintf( buf, sizeof( buf ),
548 "retrying URI=\"%s\" DN=\"%s\"",
550 BER_BVISNULL( &msc->msc_bound_ndn ) ?
551 "" : msc->msc_bound_ndn.bv_val );
552 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
554 Debug( LDAP_DEBUG_ANY,
555 "%s meta_back_retry[%d]: %s.\n",
556 op->o_log_prefix, candidate, buf );
559 meta_clear_one_candidate( msc );
560 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
562 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
564 /* mc here must be the regular mc, reset and ready for init */
565 rc = meta_back_init_one_conn( op, rs, mc, candidate,
566 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
568 LDAP_BACK_CONN_BINDING_SET( msc );
571 if ( rc == LDAP_SUCCESS ) {
572 rc = meta_back_single_dobind( op, rs, mcp, candidate,
573 sendok, mt->mt_nretries, 0 );
575 Debug( LDAP_DEBUG_ANY,
576 "%s meta_back_retry[%d]: "
577 "meta_back_single_dobind=%d\n",
578 op->o_log_prefix, candidate, rc );
579 if ( rc == LDAP_SUCCESS ) {
580 if ( be_isroot( op ) ) {
581 LDAP_BACK_CONN_ISBOUND_SET( msc );
583 LDAP_BACK_CONN_ISANON_SET( msc );
589 if ( rc != LDAP_SUCCESS ) {
590 SlapReply *candidates = meta_back_candidates_get( op );
592 candidates[ candidate ].sr_err = rc;
594 if ( *mcp != NULL ) {
596 LDAP_BACK_CONN_BINDING_CLEAR( msc );
598 LDAP_BACK_CONN_TAINTED_SET( mc );
599 /* only release if mandatory; otherwise
600 * let the caller do what's best before
602 if ( META_BACK_ONERR_STOP( mi ) ) {
603 meta_back_release_conn_lock( op, mc, 0 );
611 send_ldap_result( op, rs );
615 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
616 meta_back_quarantine( op, rs, candidate );
619 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
621 return rc == LDAP_SUCCESS ? 1 : 0;
625 * callback for unique candidate selection
628 meta_back_conn_cb( Operation *op, SlapReply *rs )
630 assert( op->o_tag == LDAP_REQ_SEARCH );
632 switch ( rs->sr_type ) {
634 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
650 meta_back_get_candidate(
655 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
659 * tries to get a unique candidate
660 * (takes care of default target)
662 candidate = meta_back_select_unique_candidate( mi, ndn );
665 * if any is found, inits the connection
667 if ( candidate == META_TARGET_NONE ) {
668 rs->sr_err = LDAP_NO_SUCH_OBJECT;
669 rs->sr_text = "no suitable candidate target found";
671 } else if ( candidate == META_TARGET_MULTIPLE ) {
674 SlapReply rs2 = { 0 };
675 slap_callback cb2 = { 0 };
678 /* try to get a unique match for the request ndn
679 * among the multiple candidates available */
680 op2.o_tag = LDAP_REQ_SEARCH;
682 op2.o_req_ndn = *ndn;
683 op2.ors_scope = LDAP_SCOPE_BASE;
684 op2.ors_deref = LDAP_DEREF_NEVER;
685 op2.ors_attrs = slap_anlist_no_attrs;
686 op2.ors_attrsonly = 0;
687 op2.ors_limit = NULL;
689 op2.ors_tlimit = SLAP_NO_LIMIT;
691 f.f_choice = LDAP_FILTER_PRESENT;
692 f.f_desc = slap_schema.si_ad_objectClass;
694 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
696 op2.o_callback = &cb2;
697 cb2.sc_response = meta_back_conn_cb;
698 cb2.sc_private = (void *)&candidate;
700 rc = op->o_bd->be_search( &op2, &rs2 );
702 switch ( rs2.sr_err ) {
705 rs->sr_err = rs2.sr_err;
708 case LDAP_SIZELIMIT_EXCEEDED:
709 /* if multiple candidates can serve the operation,
710 * and a default target is defined, and it is
711 * a candidate, try using it (FIXME: YMMV) */
712 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
713 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
714 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
716 candidate = mi->mi_defaulttarget;
717 rs->sr_err = LDAP_SUCCESS;
721 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
722 rs->sr_text = "cannot select unique candidate target";
728 rs->sr_err = LDAP_SUCCESS;
734 static void *meta_back_candidates_dummy;
737 meta_back_candidates_keyfree(
741 metacandidates_t *mc = (metacandidates_t *)data;
743 ber_memfree_x( mc->mc_candidates, NULL );
744 ber_memfree_x( data, NULL );
748 meta_back_candidates_get( Operation *op )
750 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
751 metacandidates_t *mc;
753 if ( op->o_threadctx ) {
756 ldap_pvt_thread_pool_getkey( op->o_threadctx,
757 &meta_back_candidates_dummy, &data, NULL );
758 mc = (metacandidates_t *)data;
761 mc = mi->mi_candidates;
765 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
766 mc->mc_ntargets = mi->mi_ntargets;
767 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
768 if ( op->o_threadctx ) {
772 ldap_pvt_thread_pool_setkey( op->o_threadctx,
773 &meta_back_candidates_dummy, data,
774 meta_back_candidates_keyfree );
777 mi->mi_candidates = mc;
780 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
781 /* NOTE: in the future, may want to allow back-config
782 * to add/remove targets from back-meta... */
783 mc->mc_candidates = ch_realloc( mc->mc_candidates,
784 sizeof( SlapReply ) * mi->mi_ntargets );
785 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
786 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
787 mc->mc_ntargets = mi->mi_ntargets;
790 return mc->mc_candidates;
796 * Prepares the connection structure
800 * - determine what DN is being requested:
802 * op requires candidate checks
804 * add unique parent of o_req_ndn
805 * bind unique^*[/all] o_req_ndn [no check]
806 * compare unique^+ o_req_ndn
807 * delete unique o_req_ndn
808 * modify unique o_req_ndn
809 * search any o_req_ndn
810 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
812 * - for ops that require the candidate to be unique, in case of multiple
813 * occurrences an internal search with sizeLimit=1 is performed
814 * if a unique candidate can actually be determined. If none is found,
815 * the operation aborts; if multiple are found, the default target
816 * is used if defined and candidate; otherwise the operation aborts.
818 * *^note: actually, the bind operation is handled much like a search;
819 * i.e. the bind is broadcast to all candidate targets.
821 * +^note: actually, the compare operation is handled much like a search;
822 * i.e. the compare is broadcast to all candidate targets, while checking
823 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
831 ldap_back_send_t sendok )
833 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
834 metaconn_t *mc = NULL,
836 int cached = META_TARGET_NONE,
837 i = META_TARGET_NONE,
843 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
847 META_DNTYPE_NEWPARENT
848 } dn_type = META_DNTYPE_ENTRY;
849 struct berval ndn = op->o_req_ndn,
852 SlapReply *candidates = meta_back_candidates_get( op );
854 /* Internal searches are privileged and shared. So is root. */
855 /* FIXME: there seem to be concurrency issues */
856 if ( op->o_do_not_cache || be_isroot( op ) ) {
857 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
858 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
859 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
862 mc_curr.mc_local_ndn = op->o_ndn;
864 /* Explicit binds must not be shared */
865 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
866 mc_curr.mc_conn = op->o_conn;
869 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
873 /* Explicit Bind requests always get their own conn */
874 if ( !( sendok & LDAP_BACK_BINDING ) ) {
875 /* Searches for a metaconn in the avl tree */
877 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
878 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
879 (caddr_t)&mc_curr, meta_back_conndn_cmp );
881 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
882 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
884 /* don't let anyone else use this expired connection */
885 (void)avl_delete( &mi->mi_conninfo.lai_tree,
886 (caddr_t)mc, meta_back_conndnmc_cmp );
887 LDAP_BACK_CONN_TAINTED_SET( mc );
889 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
890 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
893 /* Don't reuse connections while they're still binding */
894 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
895 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
896 ldap_pvt_thread_yield();
902 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
905 switch ( op->o_tag ) {
907 /* if we go to selection, the entry must not exist,
908 * and we must be able to resolve the parent */
909 dn_type = META_DNTYPE_PARENT;
910 dnParent( &ndn, &pndn );
913 case LDAP_REQ_MODRDN:
914 /* if nnewSuperior is not NULL, it must resolve
915 * to the same candidate as the req_ndn */
916 if ( op->orr_nnewSup ) {
917 dn_type = META_DNTYPE_NEWPARENT;
922 /* if bound as rootdn, the backend must bind to all targets
923 * with the administrative identity */
924 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
925 op_type = META_OP_REQUIRE_ALL;
929 case LDAP_REQ_DELETE:
930 case LDAP_REQ_MODIFY:
931 /* just a unique candidate */
934 case LDAP_REQ_COMPARE:
935 case LDAP_REQ_SEARCH:
936 /* allow multiple candidates for the searchBase */
937 op_type = META_OP_ALLOW_MULTIPLE;
941 /* right now, just break (exop?) */
946 * require all connections ...
948 if ( op_type == META_OP_REQUIRE_ALL ) {
950 /* Looks like we didn't get a bind. Open a new session... */
952 assert( new_conn == 0 );
953 mc = metaconn_alloc( op );
954 mc->mc_conn = mc_curr.mc_conn;
955 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
957 if ( sendok & LDAP_BACK_BINDING ) {
958 LDAP_BACK_CONN_BINDING_SET( mc );
962 for ( i = 0; i < mi->mi_ntargets; i++ ) {
964 * The target is activated; if needed, it is
967 candidates[ i ].sr_err = meta_back_init_one_conn( op,
968 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
970 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
971 META_CANDIDATE_SET( &candidates[ i ] );
977 * FIXME: in case one target cannot
978 * be init'd, should the other ones
981 META_CANDIDATE_RESET( &candidates[ i ] );
982 err = candidates[ i ].sr_err;
987 if ( ncandidates == 0 ) {
990 meta_back_conn_free( mc );
993 meta_back_release_conn( op, mc );
996 rs->sr_err = LDAP_NO_SUCH_OBJECT;
997 rs->sr_text = "Unable to select valid candidates";
999 if ( sendok & LDAP_BACK_SENDERR ) {
1000 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1001 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1003 send_ldap_result( op, rs );
1005 rs->sr_matched = NULL;
1015 * looks in cache, if any
1017 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1018 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1021 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1022 metatarget_t *mt = NULL;
1023 metasingleconn_t *msc = NULL;
1027 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1028 META_CANDIDATE_RESET( &candidates[ j ] );
1032 * tries to get a unique candidate
1033 * (takes care of default target)
1035 if ( i == META_TARGET_NONE ) {
1036 i = meta_back_get_candidate( op, rs, &ndn );
1038 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1039 i = meta_back_get_candidate( op, rs, &pndn );
1042 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1044 meta_back_release_conn( op, mc );
1047 if ( sendok & LDAP_BACK_SENDERR ) {
1048 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1049 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1051 send_ldap_result( op, rs );
1053 rs->sr_matched = NULL;
1060 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1063 meta_back_release_conn( op, mc );
1066 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1067 rs->sr_text = "cross-target rename not supported";
1068 if ( sendok & LDAP_BACK_SENDERR ) {
1069 send_ldap_result( op, rs );
1076 Debug( LDAP_DEBUG_TRACE,
1077 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1078 i, op->o_req_ndn.bv_val, 0 );
1081 /* Retries searching for a metaconn in the avl tree
1082 * the reason is that the connection might have been
1083 * created by meta_back_get_candidate() */
1084 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1086 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1087 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1088 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1090 /* Don't reuse connections while they're still binding */
1091 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1092 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1093 ldap_pvt_thread_yield();
1099 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1102 /* Looks like we didn't get a bind. Open a new session... */
1104 assert( new_conn == 0 );
1105 mc = metaconn_alloc( op );
1106 mc->mc_conn = mc_curr.mc_conn;
1107 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1109 if ( sendok & LDAP_BACK_BINDING ) {
1110 LDAP_BACK_CONN_BINDING_SET( mc );
1116 * Clear all other candidates
1118 ( void )meta_clear_unused_candidates( op, i );
1120 mt = mi->mi_targets[ i ];
1121 msc = &mc->mc_conns[ i ];
1124 * The target is activated; if needed, it is
1125 * also init'd. In case of error, meta_back_init_one_conn
1126 * sends the appropriate result.
1128 err = meta_back_init_one_conn( op, rs, mc, i,
1129 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1130 if ( err != LDAP_SUCCESS ) {
1132 * FIXME: in case one target cannot
1133 * be init'd, should the other ones
1136 META_CANDIDATE_RESET( &candidates[ i ] );
1139 meta_back_conn_free( mc );
1142 meta_back_release_conn( op, mc );
1147 candidates[ i ].sr_err = LDAP_SUCCESS;
1148 META_CANDIDATE_SET( &candidates[ i ] );
1156 * if no unique candidate ...
1160 /* Looks like we didn't get a bind. Open a new session... */
1162 assert( new_conn == 0 );
1163 mc = metaconn_alloc( op );
1164 mc->mc_conn = mc_curr.mc_conn;
1165 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1167 if ( sendok & LDAP_BACK_BINDING ) {
1168 LDAP_BACK_CONN_BINDING_SET( mc );
1172 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1173 metatarget_t *mt = mi->mi_targets[ i ];
1174 metasingleconn_t *msc = &mc->mc_conns[ i ];
1177 || meta_back_is_candidate( mt, &op->o_req_ndn,
1178 LDAP_SCOPE_SUBTREE ) )
1182 * The target is activated; if needed, it is
1185 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1186 LDAP_BACK_CONN_ISPRIV( &mc_curr ), LDAP_BACK_DONTSEND );
1187 if ( lerr == LDAP_SUCCESS ) {
1188 META_CANDIDATE_SET( &candidates[ i ] );
1189 candidates[ i ].sr_err = LDAP_SUCCESS;
1192 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1193 op->o_log_prefix, i, 0 );
1198 * FIXME: in case one target cannot
1199 * be init'd, should the other ones
1203 ( void )meta_clear_one_candidate( msc );
1205 /* leave the target candidate, but record the error for later use */
1206 candidates[ i ].sr_err = lerr;
1209 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1210 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined: %d\n",
1211 op->o_log_prefix, i, lerr );
1214 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1215 op->o_log_prefix, i, lerr );
1218 if ( META_BACK_ONERR_STOP( mi ) ) {
1219 if ( sendok & LDAP_BACK_SENDERR ) {
1220 send_ldap_result( op, rs );
1225 meta_back_conn_free( mc );
1228 meta_back_release_conn( op, mc );
1240 ( void )meta_clear_one_candidate( msc );
1242 META_CANDIDATE_RESET( &candidates[ i ] );
1246 if ( ncandidates == 0 ) {
1249 meta_back_conn_free( mc );
1252 meta_back_release_conn( op, 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;
1272 /* clear out meta_back_init_one_conn non-fatal errors */
1273 rs->sr_err = LDAP_SUCCESS;
1276 /* touch the timestamp */
1277 if ( mi->mi_idle_timeout != 0 ) {
1278 mc->mc_time = op->o_time;
1282 if ( mi->mi_conn_ttl ) {
1283 mc->mc_create_time = op->o_time;
1287 * Inserts the newly created metaconn in the avl tree
1289 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1290 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1291 meta_back_conndn_cmp, meta_back_conndn_dup );
1293 #if PRINT_CONNTREE > 0
1294 myprint( mi->mi_conninfo.lai_tree, "meta_back_getconn" );
1295 #endif /* PRINT_CONNTREE */
1297 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1300 * Err could be -1 in case a duplicate metaconn is inserted
1307 /* duplicate: free and try to get the newly created one */
1308 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1312 LDAP_BACK_CONN_TAINTED_SET( mc );
1316 Debug( LDAP_DEBUG_ANY,
1317 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1318 op->o_log_prefix, ncandidates,
1319 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1322 meta_back_conn_free( mc );
1324 rs->sr_err = LDAP_OTHER;
1325 rs->sr_text = "proxy bind collision";
1326 if ( sendok & LDAP_BACK_SENDERR ) {
1327 send_ldap_result( op, rs );
1333 Debug( LDAP_DEBUG_TRACE,
1334 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1335 op->o_log_prefix, ncandidates,
1336 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1339 Debug( LDAP_DEBUG_TRACE,
1340 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1341 op->o_log_prefix, ncandidates,
1342 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1349 meta_back_release_conn_lock(
1354 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1356 assert( mc != NULL );
1359 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1361 assert( mc->mc_refcnt > 0 );
1363 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1364 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1365 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld tainted.\n",
1366 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1367 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1368 ( caddr_t )mc, meta_back_conndnmc_cmp );
1369 if ( mc->mc_refcnt == 0 ) {
1370 meta_back_conn_free( mc );
1374 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1379 meta_back_quarantine(
1384 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1385 metatarget_t *mt = mi->mi_targets[ candidate ];
1387 slap_retry_info_t *ri = &mt->mt_quarantine;
1389 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1391 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1392 time_t new_last = slap_get_time();
1394 switch ( mt->mt_isquarantined ) {
1395 case LDAP_BACK_FQ_NO:
1396 if ( ri->ri_last == new_last ) {
1400 Debug( LDAP_DEBUG_ANY,
1401 "%s meta_back_quarantine[%d]: enter.\n",
1402 op->o_log_prefix, candidate, 0 );
1408 case LDAP_BACK_FQ_RETRYING:
1409 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1410 char buf[ SLAP_TEXT_BUFLEN ];
1412 snprintf( buf, sizeof( buf ),
1413 "meta_back_quarantine[%d]: block #%d try #%d failed",
1414 candidate, ri->ri_idx, ri->ri_count );
1415 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1416 op->o_log_prefix, buf, 0 );
1420 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1421 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1432 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1433 ri->ri_last = new_last;
1435 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1436 Debug( LDAP_DEBUG_ANY,
1437 "%s meta_back_quarantine[%d]: exit.\n",
1438 op->o_log_prefix, candidate, 0 );
1440 if ( mi->mi_quarantine_f ) {
1441 (void)mi->mi_quarantine_f( mi, candidate,
1442 mi->mi_quarantine_p );
1447 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1451 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );