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 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
372 &err, NULL, NULL, NULL, NULL, 1 );
375 if ( rs->sr_err == LDAP_SUCCESS ) {
379 /* FIXME: in case a referral
380 * is returned, should we try
381 * using it instead of the
383 if ( rs->sr_err == LDAP_SUCCESS ) {
384 ldap_install_tls( msc->msc_ld );
386 } else if ( rs->sr_err == LDAP_REFERRAL ) {
387 rs->sr_err = LDAP_OTHER;
388 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
392 if ( data->bv_val ) {
393 ber_memfree( data->bv_val );
400 rs->sr_err = LDAP_OTHER;
407 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
409 * use synchronous StartTLS
411 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
412 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
414 /* if StartTLS is requested, only attempt it if the URL
415 * is not "ldaps://"; this may occur not only in case
416 * of misconfiguration, but also when used in the chain
417 * overlay, where the "uri" can be parsed out of a referral */
418 if ( rs->sr_err == LDAP_SERVER_DOWN
419 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
421 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
426 #endif /* HAVE_TLS */
429 * Set the network timeout if set
431 if ( mt->mt_network_timeout != 0 ) {
432 struct timeval network_timeout;
434 network_timeout.tv_usec = 0;
435 network_timeout.tv_sec = mt->mt_network_timeout;
437 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
438 (void *)&network_timeout );
442 * If the connection DN is not null, an attempt to rewrite it is made
446 if ( !BER_BVISNULL( &mt->mt_pseudorootdn ) ) {
447 ber_dupbv( &msc->msc_bound_ndn, &mt->mt_pseudorootdn );
448 if ( !BER_BVISNULL( &mt->mt_pseudorootpw ) ) {
449 ber_dupbv( &msc->msc_cred, &mt->mt_pseudorootpw );
453 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
456 LDAP_BACK_CONN_ISPRIV_SET( msc );
459 BER_BVZERO( &msc->msc_cred );
460 BER_BVZERO( &msc->msc_bound_ndn );
461 if ( !BER_BVISEMPTY( &op->o_ndn )
462 && SLAP_IS_AUTHZ_BACKEND( op )
466 dc.conn = op->o_conn;
471 * Rewrite the bind dn if needed
473 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
474 &msc->msc_bound_ndn ) )
476 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
481 /* copy the DN if needed */
482 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
483 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
487 ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
491 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
494 if ( rs->sr_err == LDAP_SUCCESS ) {
496 * Sets a cookie for the rewrite session
498 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
501 rs->sr_err = slap_map_api2result( rs );
502 if ( sendok & LDAP_BACK_SENDERR ) {
503 send_ldap_result( op, rs );
514 * Retries one connection
522 ldap_back_send_t sendok )
524 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
525 metatarget_t *mt = mi->mi_targets[ candidate ];
526 metaconn_t *mc = *mcp;
527 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
528 int rc = LDAP_UNAVAILABLE,
529 binding = LDAP_BACK_CONN_BINDING( msc );
531 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
533 assert( mc->mc_refcnt > 0 );
534 if ( mc->mc_refcnt == 1 ) {
535 if ( LogTest( LDAP_DEBUG_ANY ) ) {
536 char buf[ SLAP_TEXT_BUFLEN ];
538 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
539 snprintf( buf, sizeof( buf ),
540 "retrying URI=\"%s\" DN=\"%s\"",
542 BER_BVISNULL( &msc->msc_bound_ndn ) ?
543 "" : msc->msc_bound_ndn.bv_val );
544 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
546 Debug( LDAP_DEBUG_ANY,
547 "%s meta_back_retry[%d]: %s.\n",
548 op->o_log_prefix, candidate, buf );
551 meta_clear_one_candidate( msc );
552 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
554 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
556 /* mc here must be the regular mc, reset and ready for init */
557 rc = meta_back_init_one_conn( op, rs, mc, candidate,
558 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
560 LDAP_BACK_CONN_BINDING_SET( msc );
563 if ( rc == LDAP_SUCCESS ) {
564 rc = meta_back_single_dobind( op, rs, mcp, candidate,
565 sendok, mt->mt_nretries, 0 );
567 Debug( LDAP_DEBUG_ANY,
568 "%s meta_back_retry[%d]: "
569 "meta_back_single_dobind=%d\n",
570 op->o_log_prefix, candidate, rc );
571 if ( rc == LDAP_SUCCESS ) {
572 if ( be_isroot( op ) ) {
573 LDAP_BACK_CONN_ISBOUND_SET( msc );
575 LDAP_BACK_CONN_ISANON_SET( msc );
581 if ( rc != LDAP_SUCCESS ) {
582 SlapReply *candidates = meta_back_candidates_get( op );
584 candidates[ candidate ].sr_err = rc;
586 if ( *mcp != NULL ) {
588 LDAP_BACK_CONN_BINDING_CLEAR( msc );
590 LDAP_BACK_CONN_TAINTED_SET( mc );
591 /* only release if mandatory; otherwise
592 * let the caller do what's best before
594 if ( META_BACK_ONERR_STOP( mi ) ) {
595 meta_back_release_conn_lock( op, mc, 0 );
603 send_ldap_result( op, rs );
607 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
608 meta_back_quarantine( op, rs, candidate );
611 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
613 return rc == LDAP_SUCCESS ? 1 : 0;
617 * callback for unique candidate selection
620 meta_back_conn_cb( Operation *op, SlapReply *rs )
622 assert( op->o_tag == LDAP_REQ_SEARCH );
624 switch ( rs->sr_type ) {
626 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
642 meta_back_get_candidate(
647 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
651 * tries to get a unique candidate
652 * (takes care of default target)
654 candidate = meta_back_select_unique_candidate( mi, ndn );
657 * if any is found, inits the connection
659 if ( candidate == META_TARGET_NONE ) {
660 rs->sr_err = LDAP_NO_SUCH_OBJECT;
661 rs->sr_text = "no suitable candidate target found";
663 } else if ( candidate == META_TARGET_MULTIPLE ) {
666 SlapReply rs2 = { 0 };
667 slap_callback cb2 = { 0 };
670 /* try to get a unique match for the request ndn
671 * among the multiple candidates available */
672 op2.o_tag = LDAP_REQ_SEARCH;
674 op2.o_req_ndn = *ndn;
675 op2.ors_scope = LDAP_SCOPE_BASE;
676 op2.ors_deref = LDAP_DEREF_NEVER;
677 op2.ors_attrs = slap_anlist_no_attrs;
678 op2.ors_attrsonly = 0;
679 op2.ors_limit = NULL;
681 op2.ors_tlimit = SLAP_NO_LIMIT;
683 f.f_choice = LDAP_FILTER_PRESENT;
684 f.f_desc = slap_schema.si_ad_objectClass;
686 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
688 op2.o_callback = &cb2;
689 cb2.sc_response = meta_back_conn_cb;
690 cb2.sc_private = (void *)&candidate;
692 rc = op->o_bd->be_search( &op2, &rs2 );
694 switch ( rs2.sr_err ) {
697 rs->sr_err = rs2.sr_err;
700 case LDAP_SIZELIMIT_EXCEEDED:
701 /* if multiple candidates can serve the operation,
702 * and a default target is defined, and it is
703 * a candidate, try using it (FIXME: YMMV) */
704 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
705 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
706 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
708 candidate = mi->mi_defaulttarget;
709 rs->sr_err = LDAP_SUCCESS;
713 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
714 rs->sr_text = "cannot select unique candidate target";
720 rs->sr_err = LDAP_SUCCESS;
726 static void *meta_back_candidates_dummy;
729 meta_back_candidates_keyfree(
733 metacandidates_t *mc = (metacandidates_t *)data;
735 ber_memfree_x( mc->mc_candidates, NULL );
736 ber_memfree_x( data, NULL );
740 meta_back_candidates_get( Operation *op )
742 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
743 metacandidates_t *mc;
745 if ( op->o_threadctx ) {
748 ldap_pvt_thread_pool_getkey( op->o_threadctx,
749 &meta_back_candidates_dummy, &data, NULL );
750 mc = (metacandidates_t *)data;
753 mc = mi->mi_candidates;
757 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
758 mc->mc_ntargets = mi->mi_ntargets;
759 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
760 if ( op->o_threadctx ) {
764 ldap_pvt_thread_pool_setkey( op->o_threadctx,
765 &meta_back_candidates_dummy, data,
766 meta_back_candidates_keyfree );
769 mi->mi_candidates = mc;
772 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
773 /* NOTE: in the future, may want to allow back-config
774 * to add/remove targets from back-meta... */
775 mc->mc_candidates = ch_realloc( mc->mc_candidates,
776 sizeof( SlapReply ) * mi->mi_ntargets );
777 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
778 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
779 mc->mc_ntargets = mi->mi_ntargets;
782 return mc->mc_candidates;
788 * Prepares the connection structure
792 * - determine what DN is being requested:
794 * op requires candidate checks
796 * add unique parent of o_req_ndn
797 * bind unique^*[/all] o_req_ndn [no check]
798 * compare unique^+ o_req_ndn
799 * delete unique o_req_ndn
800 * modify unique o_req_ndn
801 * search any o_req_ndn
802 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
804 * - for ops that require the candidate to be unique, in case of multiple
805 * occurrences an internal search with sizeLimit=1 is performed
806 * if a unique candidate can actually be determined. If none is found,
807 * the operation aborts; if multiple are found, the default target
808 * is used if defined and candidate; otherwise the operation aborts.
810 * *^note: actually, the bind operation is handled much like a search;
811 * i.e. the bind is broadcast to all candidate targets.
813 * +^note: actually, the compare operation is handled much like a search;
814 * i.e. the compare is broadcast to all candidate targets, while checking
815 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
823 ldap_back_send_t sendok )
825 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
826 metaconn_t *mc = NULL,
828 int cached = META_TARGET_NONE,
829 i = META_TARGET_NONE,
835 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
839 META_DNTYPE_NEWPARENT
840 } dn_type = META_DNTYPE_ENTRY;
841 struct berval ndn = op->o_req_ndn,
844 SlapReply *candidates = meta_back_candidates_get( op );
846 /* Internal searches are privileged and shared. So is root. */
847 /* FIXME: there seem to be concurrency issues */
848 if ( op->o_do_not_cache || be_isroot( op ) ) {
849 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
850 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
851 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
854 mc_curr.mc_local_ndn = op->o_ndn;
856 /* Explicit binds must not be shared */
857 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
858 mc_curr.mc_conn = op->o_conn;
861 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
865 /* Explicit Bind requests always get their own conn */
866 if ( !( sendok & LDAP_BACK_BINDING ) ) {
867 /* Searches for a metaconn in the avl tree */
869 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
870 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
871 (caddr_t)&mc_curr, meta_back_conndn_cmp );
873 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
874 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
876 /* don't let anyone else use this expired connection */
877 (void)avl_delete( &mi->mi_conninfo.lai_tree,
878 (caddr_t)mc, meta_back_conndnmc_cmp );
879 LDAP_BACK_CONN_TAINTED_SET( mc );
881 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
882 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
885 /* Don't reuse connections while they're still binding */
886 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
887 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
888 ldap_pvt_thread_yield();
894 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
897 switch ( op->o_tag ) {
899 /* if we go to selection, the entry must not exist,
900 * and we must be able to resolve the parent */
901 dn_type = META_DNTYPE_PARENT;
902 dnParent( &ndn, &pndn );
905 case LDAP_REQ_MODRDN:
906 /* if nnewSuperior is not NULL, it must resolve
907 * to the same candidate as the req_ndn */
908 if ( op->orr_nnewSup ) {
909 dn_type = META_DNTYPE_NEWPARENT;
914 /* if bound as rootdn, the backend must bind to all targets
915 * with the administrative identity */
916 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
917 op_type = META_OP_REQUIRE_ALL;
921 case LDAP_REQ_DELETE:
922 case LDAP_REQ_MODIFY:
923 /* just a unique candidate */
926 case LDAP_REQ_COMPARE:
927 case LDAP_REQ_SEARCH:
928 /* allow multiple candidates for the searchBase */
929 op_type = META_OP_ALLOW_MULTIPLE;
933 /* right now, just break (exop?) */
938 * require all connections ...
940 if ( op_type == META_OP_REQUIRE_ALL ) {
942 /* Looks like we didn't get a bind. Open a new session... */
944 assert( new_conn == 0 );
945 mc = metaconn_alloc( op );
946 mc->mc_conn = mc_curr.mc_conn;
947 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
949 if ( sendok & LDAP_BACK_BINDING ) {
950 LDAP_BACK_CONN_BINDING_SET( mc );
954 for ( i = 0; i < mi->mi_ntargets; i++ ) {
956 * The target is activated; if needed, it is
959 candidates[ i ].sr_err = meta_back_init_one_conn( op,
960 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
962 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
963 META_CANDIDATE_SET( &candidates[ i ] );
969 * FIXME: in case one target cannot
970 * be init'd, should the other ones
973 META_CANDIDATE_RESET( &candidates[ i ] );
974 err = candidates[ i ].sr_err;
979 if ( ncandidates == 0 ) {
982 meta_back_conn_free( mc );
985 meta_back_release_conn( op, mc );
988 rs->sr_err = LDAP_NO_SUCH_OBJECT;
989 rs->sr_text = "Unable to select valid candidates";
991 if ( sendok & LDAP_BACK_SENDERR ) {
992 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
993 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
995 send_ldap_result( op, rs );
997 rs->sr_matched = NULL;
1007 * looks in cache, if any
1009 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1010 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1013 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1014 metatarget_t *mt = NULL;
1015 metasingleconn_t *msc = NULL;
1019 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1020 META_CANDIDATE_RESET( &candidates[ j ] );
1024 * tries to get a unique candidate
1025 * (takes care of default target)
1027 if ( i == META_TARGET_NONE ) {
1028 i = meta_back_get_candidate( op, rs, &ndn );
1030 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1031 i = meta_back_get_candidate( op, rs, &pndn );
1034 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1036 meta_back_release_conn( op, mc );
1039 if ( sendok & LDAP_BACK_SENDERR ) {
1040 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1041 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1043 send_ldap_result( op, rs );
1045 rs->sr_matched = NULL;
1052 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1055 meta_back_release_conn( op, mc );
1058 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1059 rs->sr_text = "cross-target rename not supported";
1060 if ( sendok & LDAP_BACK_SENDERR ) {
1061 send_ldap_result( op, rs );
1068 Debug( LDAP_DEBUG_TRACE,
1069 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1070 i, op->o_req_ndn.bv_val, 0 );
1073 /* Retries searching for a metaconn in the avl tree
1074 * the reason is that the connection might have been
1075 * created by meta_back_get_candidate() */
1076 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1078 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1079 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1080 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1082 /* Don't reuse connections while they're still binding */
1083 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1084 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1085 ldap_pvt_thread_yield();
1091 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1094 /* Looks like we didn't get a bind. Open a new session... */
1096 assert( new_conn == 0 );
1097 mc = metaconn_alloc( op );
1098 mc->mc_conn = mc_curr.mc_conn;
1099 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1101 if ( sendok & LDAP_BACK_BINDING ) {
1102 LDAP_BACK_CONN_BINDING_SET( mc );
1108 * Clear all other candidates
1110 ( void )meta_clear_unused_candidates( op, i );
1112 mt = mi->mi_targets[ i ];
1113 msc = &mc->mc_conns[ i ];
1116 * The target is activated; if needed, it is
1117 * also init'd. In case of error, meta_back_init_one_conn
1118 * sends the appropriate result.
1120 err = meta_back_init_one_conn( op, rs, mc, i,
1121 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1122 if ( err != LDAP_SUCCESS ) {
1124 * FIXME: in case one target cannot
1125 * be init'd, should the other ones
1128 META_CANDIDATE_RESET( &candidates[ i ] );
1131 meta_back_conn_free( mc );
1134 meta_back_release_conn( op, mc );
1139 candidates[ i ].sr_err = LDAP_SUCCESS;
1140 META_CANDIDATE_SET( &candidates[ i ] );
1148 * if no unique candidate ...
1152 /* Looks like we didn't get a bind. Open a new session... */
1154 assert( new_conn == 0 );
1155 mc = metaconn_alloc( op );
1156 mc->mc_conn = mc_curr.mc_conn;
1157 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1159 if ( sendok & LDAP_BACK_BINDING ) {
1160 LDAP_BACK_CONN_BINDING_SET( mc );
1164 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1165 metatarget_t *mt = mi->mi_targets[ i ];
1166 metasingleconn_t *msc = &mc->mc_conns[ i ];
1169 || meta_back_is_candidate( mt, &op->o_req_ndn,
1170 LDAP_SCOPE_SUBTREE ) )
1174 * The target is activated; if needed, it is
1177 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1178 LDAP_BACK_CONN_ISPRIV( &mc_curr ), LDAP_BACK_DONTSEND );
1179 if ( lerr == LDAP_SUCCESS ) {
1180 META_CANDIDATE_SET( &candidates[ i ] );
1181 candidates[ i ].sr_err = LDAP_SUCCESS;
1184 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1185 op->o_log_prefix, i, 0 );
1190 * FIXME: in case one target cannot
1191 * be init'd, should the other ones
1195 ( void )meta_clear_one_candidate( msc );
1197 /* leave the target candidate, but record the error for later use */
1198 candidates[ i ].sr_err = lerr;
1201 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1202 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined: %d\n",
1203 op->o_log_prefix, i, lerr );
1206 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1207 op->o_log_prefix, i, lerr );
1210 if ( META_BACK_ONERR_STOP( mi ) ) {
1211 if ( sendok & LDAP_BACK_SENDERR ) {
1212 send_ldap_result( op, rs );
1217 meta_back_conn_free( mc );
1220 meta_back_release_conn( op, mc );
1232 ( void )meta_clear_one_candidate( msc );
1234 META_CANDIDATE_RESET( &candidates[ i ] );
1238 if ( ncandidates == 0 ) {
1241 meta_back_conn_free( mc );
1244 meta_back_release_conn( op, mc );
1247 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1248 rs->sr_text = "Unable to select valid candidates";
1250 if ( sendok & LDAP_BACK_SENDERR ) {
1251 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1252 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1254 send_ldap_result( op, rs );
1256 rs->sr_matched = NULL;
1264 /* clear out meta_back_init_one_conn non-fatal errors */
1265 rs->sr_err = LDAP_SUCCESS;
1268 /* touch the timestamp */
1269 if ( mi->mi_idle_timeout != 0 ) {
1270 mc->mc_time = op->o_time;
1274 if ( mi->mi_conn_ttl ) {
1275 mc->mc_create_time = op->o_time;
1279 * Inserts the newly created metaconn in the avl tree
1281 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1282 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1283 meta_back_conndn_cmp, meta_back_conndn_dup );
1285 #if PRINT_CONNTREE > 0
1286 myprint( mi->mi_conninfo.lai_tree, "meta_back_getconn" );
1287 #endif /* PRINT_CONNTREE */
1289 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1292 * Err could be -1 in case a duplicate metaconn is inserted
1299 /* duplicate: free and try to get the newly created one */
1300 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1304 LDAP_BACK_CONN_TAINTED_SET( mc );
1308 Debug( LDAP_DEBUG_ANY,
1309 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1310 op->o_log_prefix, ncandidates,
1311 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1314 meta_back_conn_free( mc );
1316 rs->sr_err = LDAP_OTHER;
1317 rs->sr_text = "proxy bind collision";
1318 if ( sendok & LDAP_BACK_SENDERR ) {
1319 send_ldap_result( op, rs );
1325 Debug( LDAP_DEBUG_TRACE,
1326 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1327 op->o_log_prefix, ncandidates,
1328 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1331 Debug( LDAP_DEBUG_TRACE,
1332 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1333 op->o_log_prefix, ncandidates,
1334 LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1341 meta_back_release_conn_lock(
1346 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1348 assert( mc != NULL );
1351 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1353 assert( mc->mc_refcnt > 0 );
1355 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1356 if ( LDAP_BACK_CONN_TAINTED( mc ) ) {
1357 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld tainted.\n",
1358 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc->mc_conn ) );
1359 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1360 ( caddr_t )mc, meta_back_conndnmc_cmp );
1361 if ( mc->mc_refcnt == 0 ) {
1362 meta_back_conn_free( mc );
1366 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1371 meta_back_quarantine(
1376 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1377 metatarget_t *mt = mi->mi_targets[ candidate ];
1379 slap_retry_info_t *ri = &mt->mt_quarantine;
1381 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1383 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1384 time_t new_last = slap_get_time();
1386 switch ( mt->mt_isquarantined ) {
1387 case LDAP_BACK_FQ_NO:
1388 if ( ri->ri_last == new_last ) {
1392 Debug( LDAP_DEBUG_ANY,
1393 "%s meta_back_quarantine[%d]: enter.\n",
1394 op->o_log_prefix, candidate, 0 );
1400 case LDAP_BACK_FQ_RETRYING:
1401 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1402 char buf[ SLAP_TEXT_BUFLEN ];
1404 snprintf( buf, sizeof( buf ),
1405 "meta_back_quarantine[%d]: block #%d try #%d failed",
1406 candidate, ri->ri_idx, ri->ri_count );
1407 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1408 op->o_log_prefix, buf, 0 );
1412 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1413 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1424 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1425 ri->ri_last = new_last;
1427 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1428 Debug( LDAP_DEBUG_ANY,
1429 "%s meta_back_quarantine[%d]: exit.\n",
1430 op->o_log_prefix, candidate, 0 );
1432 if ( mi->mi_quarantine_f ) {
1433 (void)mi->mi_quarantine_f( mi, candidate,
1434 mi->mi_quarantine_p );
1439 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1443 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );