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 * 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 ravl_print( Avlnode *root, int depth )
152 ravl_print( root->avl_right, depth + 1 );
154 for ( i = 0; i < depth; i++ ) {
155 fprintf( stderr, "-" );
158 mc = (metaconn_t *)root->avl_data;
159 fprintf( stderr, "mc=%p local=\"%s\" conn=%p %s refcnt=%d\n",
161 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
163 avl_bf2str( root->avl_bf ), mc->mc_refcnt );
165 ravl_print( root->avl_left, depth + 1 );
169 meta_back_print_conntree( Avlnode *root, char *msg )
171 fprintf( stderr, "========> %s\n", msg );
174 fprintf( stderr, "\t(empty)\n" );
177 ravl_print( root, 0 );
180 fprintf( stderr, "<======== %s\n", msg );
182 #endif /* META_BACK_PRINT_CONNTREE */
190 * Allocates a connection structure, making room for all the referenced targets
196 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
198 int i, ntargets = mi->mi_ntargets;
200 assert( ntargets > 0 );
202 /* malloc all in one */
203 mc = ( metaconn_t * )ch_calloc( 1, sizeof( metaconn_t )
204 + sizeof( metasingleconn_t ) * ntargets );
209 for ( i = 0; i < ntargets; i++ ) {
210 mc->mc_conns[ i ].msc_info = mi;
213 mc->mc_authz_target = META_BOUND_NONE;
220 * meta_back_init_one_conn
222 * Initializes one connection
225 meta_back_init_one_conn(
231 ldap_back_send_t sendok )
233 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
234 metatarget_t *mt = mi->mi_targets[ candidate ];
235 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
238 int isauthz = ( candidate == mc->mc_authz_target );
241 #endif /* HAVE_TLS */
243 /* if the server is quarantined, and
244 * - the current interval did not expire yet, or
245 * - no more retries should occur,
246 * don't return the connection */
247 if ( mt->mt_isquarantined ) {
248 slap_retry_info_t *ri = &mt->mt_quarantine;
251 if ( mt->mt_isquarantined == LDAP_BACK_FQ_YES ) {
252 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
253 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
255 if ( LogTest( LDAP_DEBUG_ANY ) ) {
256 char buf[ SLAP_TEXT_BUFLEN ];
258 snprintf( buf, sizeof( buf ),
259 "meta_back_init_one_conn[%d]: quarantine "
260 "retry block #%d try #%d",
261 candidate, ri->ri_idx, ri->ri_count );
262 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
263 op->o_log_prefix, buf, 0 );
266 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
271 rs->sr_err = LDAP_UNAVAILABLE;
272 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
273 send_ldap_result( op, rs );
282 if ( msc->msc_ld != NULL ) {
283 return rs->sr_err = LDAP_SUCCESS;
286 msc->msc_mscflags = 0;
289 * Attempts to initialize the connection to the target ds
291 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
292 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
294 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
295 #endif /* HAVE_TLS */
296 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
297 if ( rs->sr_err != LDAP_SUCCESS ) {
302 * Set LDAP version. This will always succeed: If the client
303 * bound with a particular version, then so can we.
305 if ( mt->mt_version != 0 ) {
306 version = mt->mt_version;
308 } else if ( op->o_conn->c_protocol != 0 ) {
309 version = op->o_conn->c_protocol;
312 version = LDAP_VERSION3;
314 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
315 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
317 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
318 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
319 LDAP_BACK_CHASE_REFERRALS( mi ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
322 /* start TLS ("tls [try-]{start|propagate}" statement) */
323 if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
326 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
328 * use asynchronous StartTLS; in case, chase referral
329 * FIXME: OpenLDAP does not return referral on StartTLS yet
333 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
334 if ( rs->sr_err == LDAP_SUCCESS ) {
335 LDAPMessage *res = NULL;
336 int rc, nretries = mt->mt_nretries;
339 LDAP_BACK_TV_SET( &tv );
342 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
345 rs->sr_err = LDAP_OTHER;
349 if ( nretries != 0 ) {
350 if ( nretries > 0 ) {
353 LDAP_BACK_TV_SET( &tv );
356 rs->sr_err = LDAP_OTHER;
360 /* only touch when activity actually took place... */
361 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
362 msc->msc_time = op->o_time;
367 if ( rc == LDAP_RES_EXTENDED ) {
368 struct berval *data = NULL;
370 /* NOTE: right now, data is unused, so don't get it */
371 rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
372 NULL, NULL /* &data */ , 0 );
373 if ( rs->sr_err == LDAP_SUCCESS ) {
376 /* FIXME: matched? referrals? response controls? */
377 rs->sr_err = ldap_parse_result( msc->msc_ld, res,
378 &err, NULL, NULL, NULL, NULL, 1 );
381 if ( rs->sr_err == LDAP_SUCCESS ) {
385 /* FIXME: in case a referral
386 * is returned, should we try
387 * using it instead of the
389 if ( rs->sr_err == LDAP_SUCCESS ) {
390 ldap_install_tls( msc->msc_ld );
392 } else if ( rs->sr_err == LDAP_REFERRAL ) {
393 /* FIXME: LDAP_OPERATIONS_ERROR? */
394 rs->sr_err = LDAP_OTHER;
395 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
399 if ( data->bv_val ) {
400 ber_memfree( data->bv_val );
407 rs->sr_err = LDAP_OTHER;
414 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
416 * use synchronous StartTLS
418 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
419 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
421 /* if StartTLS is requested, only attempt it if the URL
422 * is not "ldaps://"; this may occur not only in case
423 * of misconfiguration, but also when used in the chain
424 * overlay, where the "uri" can be parsed out of a referral */
425 if ( rs->sr_err == LDAP_SERVER_DOWN
426 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
428 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
433 #endif /* HAVE_TLS */
436 * Set the network timeout if set
438 if ( mt->mt_network_timeout != 0 ) {
439 struct timeval network_timeout;
441 network_timeout.tv_usec = 0;
442 network_timeout.tv_sec = mt->mt_network_timeout;
444 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
445 (void *)&network_timeout );
449 * If the connection DN is not null, an attempt to rewrite it is made
453 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
454 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
455 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
456 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
460 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
463 LDAP_BACK_CONN_ISPRIV_SET( msc );
466 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
467 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
468 ber_memfree_x( msc->msc_cred.bv_val, NULL );
469 BER_BVZERO( &msc->msc_cred );
471 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
472 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
473 BER_BVZERO( &msc->msc_bound_ndn );
475 if ( !BER_BVISEMPTY( &op->o_ndn )
476 && SLAP_IS_AUTHZ_BACKEND( op )
480 dc.conn = op->o_conn;
485 * Rewrite the bind dn if needed
487 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
488 &msc->msc_bound_ndn ) )
490 ldap_unbind_ext( msc->msc_ld, NULL, NULL );
495 /* copy the DN if needed */
496 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
497 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
501 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
505 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
508 if ( rs->sr_err == LDAP_SUCCESS ) {
510 * Sets a cookie for the rewrite session
512 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
515 rs->sr_err = slap_map_api2result( rs );
516 if ( sendok & LDAP_BACK_SENDERR ) {
517 send_ldap_result( op, rs );
528 * Retries one connection
536 ldap_back_send_t sendok )
538 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
539 metatarget_t *mt = mi->mi_targets[ candidate ];
540 metaconn_t *mc = *mcp;
541 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
542 int rc = LDAP_UNAVAILABLE,
545 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
546 binding = LDAP_BACK_CONN_BINDING( msc );
548 assert( mc->mc_refcnt > 0 );
549 if ( mc->mc_refcnt == 1 ) {
550 if ( LogTest( LDAP_DEBUG_ANY ) ) {
551 char buf[ SLAP_TEXT_BUFLEN ];
553 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
554 snprintf( buf, sizeof( buf ),
555 "retrying URI=\"%s\" DN=\"%s\"",
557 BER_BVISNULL( &msc->msc_bound_ndn ) ?
558 "" : msc->msc_bound_ndn.bv_val );
559 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
561 Debug( LDAP_DEBUG_ANY,
562 "%s meta_back_retry[%d]: %s.\n",
563 op->o_log_prefix, candidate, buf );
566 meta_clear_one_candidate( msc );
567 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
569 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
571 /* mc here must be the regular mc, reset and ready for init */
572 rc = meta_back_init_one_conn( op, rs, mc, candidate,
573 LDAP_BACK_CONN_ISPRIV( mc ), sendok );
575 LDAP_BACK_CONN_BINDING_SET( msc );
578 if ( rc == LDAP_SUCCESS ) {
579 rc = meta_back_single_dobind( op, rs, mcp, candidate,
580 sendok, mt->mt_nretries, 0 );
582 Debug( LDAP_DEBUG_ANY,
583 "%s meta_back_retry[%d]: "
584 "meta_back_single_dobind=%d\n",
585 op->o_log_prefix, candidate, rc );
586 if ( rc == LDAP_SUCCESS ) {
587 if ( be_isroot( op ) ) {
588 LDAP_BACK_CONN_ISBOUND_SET( msc );
590 LDAP_BACK_CONN_ISANON_SET( msc );
596 if ( rc != LDAP_SUCCESS ) {
597 SlapReply *candidates = meta_back_candidates_get( op );
599 candidates[ candidate ].sr_err = rc;
601 if ( *mcp != NULL ) {
603 LDAP_BACK_CONN_BINDING_CLEAR( msc );
605 LDAP_BACK_CONN_TAINTED_SET( mc );
606 /* only release if mandatory; otherwise
607 * let the caller do what's best before
609 if ( META_BACK_ONERR_STOP( mi ) ) {
610 meta_back_release_conn_lock( op, mc, 0 );
618 send_ldap_result( op, rs );
622 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
623 meta_back_quarantine( op, rs, candidate );
626 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
628 return rc == LDAP_SUCCESS ? 1 : 0;
632 * callback for unique candidate selection
635 meta_back_conn_cb( Operation *op, SlapReply *rs )
637 assert( op->o_tag == LDAP_REQ_SEARCH );
639 switch ( rs->sr_type ) {
641 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
657 meta_back_get_candidate(
662 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
666 * tries to get a unique candidate
667 * (takes care of default target)
669 candidate = meta_back_select_unique_candidate( mi, ndn );
672 * if any is found, inits the connection
674 if ( candidate == META_TARGET_NONE ) {
675 rs->sr_err = LDAP_NO_SUCH_OBJECT;
676 rs->sr_text = "no suitable candidate target found";
678 } else if ( candidate == META_TARGET_MULTIPLE ) {
681 SlapReply rs2 = { 0 };
682 slap_callback cb2 = { 0 };
685 /* try to get a unique match for the request ndn
686 * among the multiple candidates available */
687 op2.o_tag = LDAP_REQ_SEARCH;
689 op2.o_req_ndn = *ndn;
690 op2.ors_scope = LDAP_SCOPE_BASE;
691 op2.ors_deref = LDAP_DEREF_NEVER;
692 op2.ors_attrs = slap_anlist_no_attrs;
693 op2.ors_attrsonly = 0;
694 op2.ors_limit = NULL;
696 op2.ors_tlimit = SLAP_NO_LIMIT;
698 f.f_choice = LDAP_FILTER_PRESENT;
699 f.f_desc = slap_schema.si_ad_objectClass;
701 BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
703 op2.o_callback = &cb2;
704 cb2.sc_response = meta_back_conn_cb;
705 cb2.sc_private = (void *)&candidate;
707 rc = op->o_bd->be_search( &op2, &rs2 );
709 switch ( rs2.sr_err ) {
712 rs->sr_err = rs2.sr_err;
715 case LDAP_SIZELIMIT_EXCEEDED:
716 /* if multiple candidates can serve the operation,
717 * and a default target is defined, and it is
718 * a candidate, try using it (FIXME: YMMV) */
719 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
720 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
721 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
723 candidate = mi->mi_defaulttarget;
724 rs->sr_err = LDAP_SUCCESS;
728 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
729 rs->sr_text = "cannot select unique candidate target";
735 rs->sr_err = LDAP_SUCCESS;
741 static void *meta_back_candidates_dummy;
744 meta_back_candidates_keyfree(
748 metacandidates_t *mc = (metacandidates_t *)data;
750 ber_memfree_x( mc->mc_candidates, NULL );
751 ber_memfree_x( data, NULL );
755 meta_back_candidates_get( Operation *op )
757 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
758 metacandidates_t *mc;
760 if ( op->o_threadctx ) {
763 ldap_pvt_thread_pool_getkey( op->o_threadctx,
764 &meta_back_candidates_dummy, &data, NULL );
765 mc = (metacandidates_t *)data;
768 mc = mi->mi_candidates;
772 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
773 mc->mc_ntargets = mi->mi_ntargets;
774 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
775 if ( op->o_threadctx ) {
779 ldap_pvt_thread_pool_setkey( op->o_threadctx,
780 &meta_back_candidates_dummy, data,
781 meta_back_candidates_keyfree );
784 mi->mi_candidates = mc;
787 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
788 /* NOTE: in the future, may want to allow back-config
789 * to add/remove targets from back-meta... */
790 mc->mc_candidates = ch_realloc( mc->mc_candidates,
791 sizeof( SlapReply ) * mi->mi_ntargets );
792 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
793 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
794 mc->mc_ntargets = mi->mi_ntargets;
797 return mc->mc_candidates;
803 * Prepares the connection structure
807 * - determine what DN is being requested:
809 * op requires candidate checks
811 * add unique parent of o_req_ndn
812 * bind unique^*[/all] o_req_ndn [no check]
813 * compare unique^+ o_req_ndn
814 * delete unique o_req_ndn
815 * modify unique o_req_ndn
816 * search any o_req_ndn
817 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
819 * - for ops that require the candidate to be unique, in case of multiple
820 * occurrences an internal search with sizeLimit=1 is performed
821 * if a unique candidate can actually be determined. If none is found,
822 * the operation aborts; if multiple are found, the default target
823 * is used if defined and candidate; otherwise the operation aborts.
825 * *^note: actually, the bind operation is handled much like a search;
826 * i.e. the bind is broadcast to all candidate targets.
828 * +^note: actually, the compare operation is handled much like a search;
829 * i.e. the compare is broadcast to all candidate targets, while checking
830 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
838 ldap_back_send_t sendok )
840 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
841 metaconn_t *mc = NULL,
843 int cached = META_TARGET_NONE,
844 i = META_TARGET_NONE,
850 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
854 META_DNTYPE_NEWPARENT
855 } dn_type = META_DNTYPE_ENTRY;
856 struct berval ndn = op->o_req_ndn,
859 SlapReply *candidates = meta_back_candidates_get( op );
861 /* Internal searches are privileged and shared. So is root. */
862 /* FIXME: there seem to be concurrency issues */
863 if ( op->o_do_not_cache || be_isroot( op ) ) {
864 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
865 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
866 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
869 mc_curr.mc_local_ndn = op->o_ndn;
871 /* Explicit binds must not be shared */
872 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
873 mc_curr.mc_conn = op->o_conn;
876 mc_curr.mc_conn = LDAP_BACK_PCONN_SET( op );
880 /* Explicit Bind requests always get their own conn */
881 if ( !( sendok & LDAP_BACK_BINDING ) ) {
882 /* Searches for a metaconn in the avl tree */
884 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
885 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
886 (caddr_t)&mc_curr, meta_back_conndn_cmp );
888 if ( ( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
889 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout ) )
891 #if META_BACK_PRINT_CONNTREE > 0
892 meta_back_print_conntree( mi->mi_conninfo.lai_tree, ">>> meta_back_getconn" );
893 #endif /* META_BACK_PRINT_CONNTREE */
894 /* don't let anyone else use this expired connection */
895 (void)avl_delete( &mi->mi_conninfo.lai_tree,
896 (caddr_t)mc, meta_back_conndnmc_cmp );
897 #if META_BACK_PRINT_CONNTREE > 0
898 meta_back_print_conntree( mi->mi_conninfo.lai_tree, "<<< meta_back_getconn" );
899 #endif /* META_BACK_PRINT_CONNTREE */
900 LDAP_BACK_CONN_TAINTED_SET( mc );
902 Debug( LDAP_DEBUG_TRACE, "%s meta_back_getconn: mc=%p conn=%ld expired.\n",
903 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc ) );
906 /* Don't reuse connections while they're still binding */
907 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
908 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
909 ldap_pvt_thread_yield();
915 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
918 switch ( op->o_tag ) {
920 /* if we go to selection, the entry must not exist,
921 * and we must be able to resolve the parent */
922 dn_type = META_DNTYPE_PARENT;
923 dnParent( &ndn, &pndn );
926 case LDAP_REQ_MODRDN:
927 /* if nnewSuperior is not NULL, it must resolve
928 * to the same candidate as the req_ndn */
929 if ( op->orr_nnewSup ) {
930 dn_type = META_DNTYPE_NEWPARENT;
935 /* if bound as rootdn, the backend must bind to all targets
936 * with the administrative identity */
937 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
938 op_type = META_OP_REQUIRE_ALL;
942 case LDAP_REQ_DELETE:
943 case LDAP_REQ_MODIFY:
944 /* just a unique candidate */
947 case LDAP_REQ_COMPARE:
948 case LDAP_REQ_SEARCH:
949 /* allow multiple candidates for the searchBase */
950 op_type = META_OP_ALLOW_MULTIPLE;
954 /* right now, just break (exop?) */
959 * require all connections ...
961 if ( op_type == META_OP_REQUIRE_ALL ) {
963 /* Looks like we didn't get a bind. Open a new session... */
965 assert( new_conn == 0 );
966 mc = metaconn_alloc( op );
967 mc->mc_conn = mc_curr.mc_conn;
968 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
970 if ( sendok & LDAP_BACK_BINDING ) {
971 LDAP_BACK_CONN_BINDING_SET( mc );
975 for ( i = 0; i < mi->mi_ntargets; i++ ) {
977 * The target is activated; if needed, it is
980 candidates[ i ].sr_err = meta_back_init_one_conn( op,
981 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
983 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
984 META_CANDIDATE_SET( &candidates[ i ] );
990 * FIXME: in case one target cannot
991 * be init'd, should the other ones
994 META_CANDIDATE_RESET( &candidates[ i ] );
995 err = candidates[ i ].sr_err;
1000 if ( ncandidates == 0 ) {
1003 meta_back_conn_free( mc );
1006 meta_back_release_conn( op, mc );
1009 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1010 rs->sr_text = "Unable to select valid candidates";
1012 if ( sendok & LDAP_BACK_SENDERR ) {
1013 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1014 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1016 send_ldap_result( op, rs );
1018 rs->sr_matched = NULL;
1028 * looks in cache, if any
1030 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1031 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1034 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1035 metatarget_t *mt = NULL;
1036 metasingleconn_t *msc = NULL;
1040 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1041 META_CANDIDATE_RESET( &candidates[ j ] );
1045 * tries to get a unique candidate
1046 * (takes care of default target)
1048 if ( i == META_TARGET_NONE ) {
1049 i = meta_back_get_candidate( op, rs, &ndn );
1051 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1052 i = meta_back_get_candidate( op, rs, &pndn );
1055 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1057 meta_back_release_conn( op, mc );
1060 if ( sendok & LDAP_BACK_SENDERR ) {
1061 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1062 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1064 send_ldap_result( op, rs );
1066 rs->sr_matched = NULL;
1073 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1076 meta_back_release_conn( op, mc );
1079 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1080 rs->sr_text = "cross-target rename not supported";
1081 if ( sendok & LDAP_BACK_SENDERR ) {
1082 send_ldap_result( op, rs );
1089 Debug( LDAP_DEBUG_TRACE,
1090 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1091 i, op->o_req_ndn.bv_val, 0 );
1094 /* Retries searching for a metaconn in the avl tree
1095 * the reason is that the connection might have been
1096 * created by meta_back_get_candidate() */
1097 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1099 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1100 mc = (metaconn_t *)avl_find( mi->mi_conninfo.lai_tree,
1101 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1103 /* Don't reuse connections while they're still binding */
1104 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1105 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1106 ldap_pvt_thread_yield();
1112 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1115 /* Looks like we didn't get a bind. Open a new session... */
1117 assert( new_conn == 0 );
1118 mc = metaconn_alloc( op );
1119 mc->mc_conn = mc_curr.mc_conn;
1120 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1122 if ( sendok & LDAP_BACK_BINDING ) {
1123 LDAP_BACK_CONN_BINDING_SET( mc );
1129 * Clear all other candidates
1131 ( void )meta_clear_unused_candidates( op, i );
1133 mt = mi->mi_targets[ i ];
1134 msc = &mc->mc_conns[ i ];
1137 * The target is activated; if needed, it is
1138 * also init'd. In case of error, meta_back_init_one_conn
1139 * sends the appropriate result.
1141 err = meta_back_init_one_conn( op, rs, mc, i,
1142 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok );
1143 if ( err != LDAP_SUCCESS ) {
1145 * FIXME: in case one target cannot
1146 * be init'd, should the other ones
1149 META_CANDIDATE_RESET( &candidates[ i ] );
1152 meta_back_conn_free( mc );
1155 meta_back_release_conn( op, mc );
1160 candidates[ i ].sr_err = LDAP_SUCCESS;
1161 META_CANDIDATE_SET( &candidates[ i ] );
1169 * if no unique candidate ...
1173 /* Looks like we didn't get a bind. Open a new session... */
1175 assert( new_conn == 0 );
1176 mc = metaconn_alloc( op );
1177 mc->mc_conn = mc_curr.mc_conn;
1178 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1180 if ( sendok & LDAP_BACK_BINDING ) {
1181 LDAP_BACK_CONN_BINDING_SET( mc );
1185 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1186 metatarget_t *mt = mi->mi_targets[ i ];
1187 metasingleconn_t *msc = &mc->mc_conns[ i ];
1190 || meta_back_is_candidate( mt, &op->o_req_ndn,
1191 LDAP_SCOPE_SUBTREE ) )
1195 * The target is activated; if needed, it is
1198 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1199 LDAP_BACK_CONN_ISPRIV( &mc_curr ), LDAP_BACK_DONTSEND );
1200 if ( lerr == LDAP_SUCCESS ) {
1201 META_CANDIDATE_SET( &candidates[ i ] );
1202 candidates[ i ].sr_err = LDAP_SUCCESS;
1205 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1206 op->o_log_prefix, i, 0 );
1208 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1209 META_CANDIDATE_SET( &candidates[ i ] );
1210 candidates[ i ].sr_err = LDAP_UNAVAILABLE;
1212 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1213 op->o_log_prefix, i,
1214 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1219 * FIXME: in case one target cannot
1220 * be init'd, should the other ones
1224 ( void )meta_clear_one_candidate( msc );
1226 /* leave the target candidate, but record the error for later use */
1227 candidates[ i ].sr_err = lerr;
1230 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1231 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] quarantined: %d\n",
1232 op->o_log_prefix, i, lerr );
1235 Debug( LDAP_DEBUG_ANY, "%s: meta_back_getconn[%d] failed: %d\n",
1236 op->o_log_prefix, i, lerr );
1239 if ( META_BACK_ONERR_STOP( mi ) ) {
1240 if ( sendok & LDAP_BACK_SENDERR ) {
1241 send_ldap_result( op, rs );
1246 meta_back_conn_free( mc );
1249 meta_back_release_conn( op, mc );
1261 ( void )meta_clear_one_candidate( msc );
1263 META_CANDIDATE_RESET( &candidates[ i ] );
1267 if ( ncandidates == 0 ) {
1270 meta_back_conn_free( mc );
1273 meta_back_release_conn( op, mc );
1276 if ( rs->sr_err == LDAP_SUCCESS ) {
1277 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1278 rs->sr_text = "Unable to select valid candidates";
1281 if ( sendok & LDAP_BACK_SENDERR ) {
1282 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1283 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1285 send_ldap_result( op, rs );
1287 rs->sr_matched = NULL;
1295 /* clear out meta_back_init_one_conn non-fatal errors */
1296 rs->sr_err = LDAP_SUCCESS;
1299 /* touch the timestamp */
1300 if ( mi->mi_idle_timeout != 0 ) {
1301 mc->mc_time = op->o_time;
1305 if ( mi->mi_conn_ttl ) {
1306 mc->mc_create_time = op->o_time;
1310 * Inserts the newly created metaconn in the avl tree
1312 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1313 #if META_BACK_PRINT_CONNTREE > 0
1314 meta_back_print_conntree( mi->mi_conninfo.lai_tree, ">>> meta_back_getconn" );
1315 #endif /* META_BACK_PRINT_CONNTREE */
1316 err = avl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1317 meta_back_conndn_cmp, meta_back_conndn_dup );
1318 #if META_BACK_PRINT_CONNTREE > 0
1319 meta_back_print_conntree( mi->mi_conninfo.lai_tree, ">>> meta_back_getconn" );
1320 #endif /* META_BACK_PRINT_CONNTREE */
1321 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1324 * Err could be -1 in case a duplicate metaconn is inserted
1331 /* duplicate: free and try to get the newly created one */
1332 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1336 LDAP_BACK_CONN_TAINTED_SET( mc );
1340 Debug( LDAP_DEBUG_ANY,
1341 "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
1342 op->o_log_prefix, ncandidates,
1343 LDAP_BACK_PCONN_ID( mc ) );
1346 meta_back_conn_free( mc );
1348 rs->sr_err = LDAP_OTHER;
1349 rs->sr_text = "proxy bind collision";
1350 if ( sendok & LDAP_BACK_SENDERR ) {
1351 send_ldap_result( op, rs );
1357 Debug( LDAP_DEBUG_TRACE,
1358 "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
1359 op->o_log_prefix, ncandidates,
1360 LDAP_BACK_PCONN_ID( mc ) );
1363 Debug( LDAP_DEBUG_TRACE,
1364 "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
1365 op->o_log_prefix, ncandidates,
1366 LDAP_BACK_PCONN_ID( mc ) );
1373 meta_back_release_conn_lock(
1378 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1380 assert( mc != NULL );
1383 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1385 assert( mc->mc_refcnt > 0 );
1387 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1388 /* NOTE: the connection is removed if either it is tainted
1389 * or if it is shared and no one else is using it. This needs
1390 * to occur because for intrinsic reasons cached connections
1391 * that are not privileged would live forever and pollute
1392 * the connection space (and eat up resources). Maybe this
1393 * should be configurable... */
1394 if ( LDAP_BACK_CONN_TAINTED( mc ) ||
1395 ( !LDAP_BACK_CONN_ISPRIV( mc ) &&
1396 LDAP_BACK_PCONN_ISPRIV( mc ) &&
1397 mc->mc_refcnt == 0 ) )
1399 Debug( LDAP_DEBUG_TRACE, "%s meta_back_release_conn: mc=%p conn=%ld tainted.\n",
1400 op->o_log_prefix, (void *)mc, LDAP_BACK_PCONN_ID( mc ) );
1401 #if META_BACK_PRINT_CONNTREE > 0
1402 meta_back_print_conntree( mi->mi_conninfo.lai_tree, ">>> meta_back_release_conn" );
1403 #endif /* META_BACK_PRINT_CONNTREE */
1404 (void)avl_delete( &mi->mi_conninfo.lai_tree,
1405 ( caddr_t )mc, meta_back_conndnmc_cmp );
1406 #if META_BACK_PRINT_CONNTREE > 0
1407 meta_back_print_conntree( mi->mi_conninfo.lai_tree, "<<< meta_back_release_conn" );
1408 #endif /* META_BACK_PRINT_CONNTREE */
1409 if ( mc->mc_refcnt == 0 ) {
1410 meta_back_conn_free( mc );
1414 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1419 meta_back_quarantine(
1424 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1425 metatarget_t *mt = mi->mi_targets[ candidate ];
1427 slap_retry_info_t *ri = &mt->mt_quarantine;
1429 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1431 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1432 time_t new_last = slap_get_time();
1434 switch ( mt->mt_isquarantined ) {
1435 case LDAP_BACK_FQ_NO:
1436 if ( ri->ri_last == new_last ) {
1440 Debug( LDAP_DEBUG_ANY,
1441 "%s meta_back_quarantine[%d]: enter.\n",
1442 op->o_log_prefix, candidate, 0 );
1448 case LDAP_BACK_FQ_RETRYING:
1449 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1450 char buf[ SLAP_TEXT_BUFLEN ];
1452 snprintf( buf, sizeof( buf ),
1453 "meta_back_quarantine[%d]: block #%d try #%d failed",
1454 candidate, ri->ri_idx, ri->ri_count );
1455 Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1456 op->o_log_prefix, buf, 0 );
1460 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1461 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1472 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1473 ri->ri_last = new_last;
1475 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1476 Debug( LDAP_DEBUG_ANY,
1477 "%s meta_back_quarantine[%d]: exit.\n",
1478 op->o_log_prefix, candidate, 0 );
1480 if ( mi->mi_quarantine_f ) {
1481 (void)mi->mi_quarantine_f( mi, candidate,
1482 mi->mi_quarantine_p );
1487 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1491 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );