1 /* $OpenLDAP$ */
2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3 *
4 * Copyright 1999-2021 The OpenLDAP Foundation.
5 * Portions Copyright 2001-2003 Pierangelo Masarati.
6 * Portions Copyright 1999-2003 Howard Chu.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
11 * Public License.
12 *
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>.
16 */
17 /* ACKNOWLEDGEMENTS:
18 * This work was initially developed by the Howard Chu for inclusion
19 * in OpenLDAP Software and subsequently enhanced by Pierangelo
20 * Masarati.
21 */
22
23 #include "portable.h"
24
25 #include <stdio.h>
26
27 #include <ac/errno.h>
28 #include <ac/socket.h>
29 #include <ac/string.h>
30
31
32 #define AVL_INTERNAL
33 #include "slap.h"
34 #include "../back-ldap/back-ldap.h"
35 #include "back-meta.h"
36
37 /*
38 * meta_back_conndn_cmp
39 *
40 * compares two struct metaconn based on the value of the conn pointer
41 * and of the local DN; used by avl stuff
42 */
43 int
meta_back_conndn_cmp(const void * c1,const void * c2)44 meta_back_conndn_cmp(
45 const void *c1,
46 const void *c2 )
47 {
48 metaconn_t *mc1 = ( metaconn_t * )c1;
49 metaconn_t *mc2 = ( metaconn_t * )c2;
50 int rc;
51
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.
55 */
56 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
57 if ( rc == 0 ) {
58 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
59 }
60
61 return rc;
62 }
63
64 /*
65 * meta_back_conndnmc_cmp
66 *
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
69 */
70 static int
meta_back_conndnmc_cmp(const void * c1,const void * c2)71 meta_back_conndnmc_cmp(
72 const void *c1,
73 const void *c2 )
74 {
75 metaconn_t *mc1 = ( metaconn_t * )c1;
76 metaconn_t *mc2 = ( metaconn_t * )c2;
77 int rc;
78
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.
82 */
83 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
84 if ( rc == 0 ) {
85 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
86 if ( rc == 0 ) {
87 rc = SLAP_PTRCMP( mc1, mc2 );
88 }
89 }
90
91 return rc;
92 }
93
94 /*
95 * meta_back_conn_cmp
96 *
97 * compares two struct metaconn based on the value of the conn pointer;
98 * used by avl stuff
99 */
100 int
meta_back_conn_cmp(const void * c1,const void * c2)101 meta_back_conn_cmp(
102 const void *c1,
103 const void *c2 )
104 {
105 metaconn_t *mc1 = ( metaconn_t * )c1;
106 metaconn_t *mc2 = ( metaconn_t * )c2;
107
108 /* For shared sessions, conn is NULL. Only explicitly
109 * bound sessions will have non-NULL conn.
110 */
111 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
112 }
113
114 /*
115 * meta_back_conndn_dup
116 *
117 * returns -1 in case a duplicate struct metaconn has been inserted;
118 * used by avl stuff
119 */
120 int
meta_back_conndn_dup(void * c1,void * c2)121 meta_back_conndn_dup(
122 void *c1,
123 void *c2 )
124 {
125 metaconn_t *mc1 = ( metaconn_t * )c1;
126 metaconn_t *mc2 = ( metaconn_t * )c2;
127
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 ) )
131 {
132 return -1;
133 }
134
135 return 0;
136 }
137
138 /*
139 * Debug stuff (got it from libavl)
140 */
141 #if META_BACK_PRINT_CONNTREE > 0
142 static void
meta_back_print(metaconn_t * mc,char * avlstr)143 meta_back_print( metaconn_t *mc, char *avlstr )
144 {
145 int i;
146
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);
150 }
151 fputc( ']', stderr );
152
153 fprintf( stderr, " mc=%p local=\"%s\" conn=%p refcnt=%d%s %s\n",
154 (void *)mc,
155 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
156 (void *)mc->mc_conn,
157 mc->mc_refcnt,
158 LDAP_BACK_CONN_TAINTED( mc ) ? " tainted" : "",
159 avlstr );
160 }
161
162 static void
meta_back_ravl_print(TAvlnode * root,int depth)163 meta_back_ravl_print( TAvlnode *root, int depth )
164 {
165 int i;
166
167 if ( root == 0 ) {
168 return;
169 }
170
171 meta_back_ravl_print( root->avl_right, depth + 1 );
172
173 for ( i = 0; i < depth; i++ ) {
174 fprintf( stderr, "-" );
175 }
176 fputc( ' ', stderr );
177
178 meta_back_print( (metaconn_t *)root->avl_data,
179 avl_bf2str( root->avl_bf ) );
180
181 meta_back_ravl_print( root->avl_left, depth + 1 );
182 }
183
184 /* NOTE: duplicate from back-ldap/bind.c */
185 static char* priv2str[] = {
186 "privileged",
187 "privileged/TLS",
188 "anonymous",
189 "anonymous/TLS",
190 "bind",
191 "bind/TLS",
192 NULL
193 };
194
195 void
meta_back_print_conntree(metainfo_t * mi,char * msg)196 meta_back_print_conntree( metainfo_t *mi, char *msg )
197 {
198 int c;
199
200 fprintf( stderr, "========> %s\n", msg );
201
202 for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
203 int i = 0;
204 metaconn_t *mc;
205
206 fprintf( stderr, " %s[%d]\n", priv2str[ c ], mi->mi_conn_priv[ c ].mic_num );
207
208 LDAP_TAILQ_FOREACH( mc, &mi->mi_conn_priv[ c ].mic_priv, mc_q )
209 {
210 fprintf( stderr, " [%d] ", i );
211 meta_back_print( mc, "" );
212 i++;
213 }
214 }
215
216 if ( mi->mi_conninfo.lai_tree == NULL ) {
217 fprintf( stderr, "\t(empty)\n" );
218
219 } else {
220 meta_back_ravl_print( mi->mi_conninfo.lai_tree, 0 );
221 }
222
223 fprintf( stderr, "<======== %s\n", msg );
224 }
225 #endif /* META_BACK_PRINT_CONNTREE */
226 /*
227 * End of debug stuff
228 */
229
230 /*
231 * metaconn_alloc
232 *
233 * Allocates a connection structure, making room for all the referenced targets
234 */
235 static metaconn_t *
metaconn_alloc(Operation * op)236 metaconn_alloc(
237 Operation *op )
238 {
239 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
240 metaconn_t *mc;
241 int ntargets = mi->mi_ntargets;
242
243 assert( ntargets > 0 );
244
245 /* malloc all in one */
246 mc = ( metaconn_t * )ch_calloc( 1, sizeof( metaconn_t )
247 + sizeof( metasingleconn_t ) * ( ntargets - 1 ) );
248 if ( mc == NULL ) {
249 return NULL;
250 }
251
252 mc->mc_info = mi;
253
254 mc->mc_authz_target = META_BOUND_NONE;
255 mc->mc_refcnt = 1;
256
257 return mc;
258 }
259
260 /*
261 * meta_back_init_one_conn
262 *
263 * Initializes one connection
264 */
265 int
meta_back_init_one_conn(Operation * op,SlapReply * rs,metaconn_t * mc,int candidate,int ispriv,ldap_back_send_t sendok,int dolock)266 meta_back_init_one_conn(
267 Operation *op,
268 SlapReply *rs,
269 metaconn_t *mc,
270 int candidate,
271 int ispriv,
272 ldap_back_send_t sendok,
273 int dolock )
274 {
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 ];
278 int version;
279 dncookie dc;
280 int isauthz = ( candidate == mc->mc_authz_target );
281 int do_return = 0;
282 #ifdef HAVE_TLS
283 int is_ldaps = 0;
284 int do_start_tls = 0;
285 #endif /* HAVE_TLS */
286
287 /* if the server is quarantined, and
288 * - the current interval did not expire yet, or
289 * - no more retries should occur,
290 * don't return the connection */
291 if ( mt->mt_isquarantined ) {
292 slap_retry_info_t *ri = &mt->mt_quarantine;
293 int dont_retry = 0;
294
295 if ( mt->mt_quarantine.ri_interval ) {
296 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
297 dont_retry = ( mt->mt_isquarantined > LDAP_BACK_FQ_NO );
298 if ( dont_retry ) {
299 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
300 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
301 if ( !dont_retry ) {
302 Debug(LDAP_DEBUG_ANY,
303 "%s meta_back_init_one_conn[%d]: quarantine " "retry block #%d try #%d.\n",
304 op->o_log_prefix,
305 candidate, ri->ri_idx,
306 ri->ri_count );
307
308 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
309 }
310
311 }
312 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );
313 }
314
315 if ( dont_retry ) {
316 rs->sr_err = LDAP_UNAVAILABLE;
317 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
318 rs->sr_text = "Target is quarantined";
319 send_ldap_result( op, rs );
320 }
321 return rs->sr_err;
322 }
323 }
324
325 retry_lock:;
326 if ( dolock ) {
327 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
328 }
329
330 /*
331 * Already init'ed
332 */
333 if ( LDAP_BACK_CONN_ISBOUND( msc )
334 || LDAP_BACK_CONN_ISANON( msc ) )
335 {
336 assert( msc->msc_ld != NULL );
337 rs->sr_err = LDAP_SUCCESS;
338 do_return = 1;
339
340 } else if ( META_BACK_CONN_CREATING( msc )
341 || LDAP_BACK_CONN_BINDING( msc ) )
342 {
343 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
344 if ( dolock ) {
345 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
346 }
347
348 ldap_pvt_thread_yield();
349 goto retry_lock;
350 }
351
352 /* sounds more appropriate */
353 rs->sr_err = LDAP_BUSY;
354 rs->sr_text = "No connections to target are available";
355 do_return = 1;
356
357 } else if ( META_BACK_CONN_INITED( msc ) ) {
358 assert( msc->msc_ld != NULL );
359 rs->sr_err = LDAP_SUCCESS;
360 do_return = 1;
361
362 } else {
363 /*
364 * creating...
365 */
366 META_BACK_CONN_CREATING_SET( msc );
367 }
368
369 if ( dolock ) {
370 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
371 }
372
373 if ( do_return ) {
374 if ( rs->sr_err != LDAP_SUCCESS
375 && op->o_conn
376 && ( sendok & LDAP_BACK_SENDERR ) )
377 {
378 send_ldap_result( op, rs );
379 }
380
381 return rs->sr_err;
382 }
383
384 assert( msc->msc_ld == NULL );
385
386 /*
387 * Attempts to initialize the connection to the target ds
388 */
389 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
390 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
391 #ifdef HAVE_TLS
392 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
393 #endif /* HAVE_TLS */
394 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
395 if ( rs->sr_err != LDAP_SUCCESS ) {
396 goto error_return;
397 }
398
399 /*
400 * Set LDAP version. This will always succeed: If the client
401 * bound with a particular version, then so can we.
402 */
403 if ( mt->mt_version != 0 ) {
404 version = mt->mt_version;
405
406 } else if ( op->o_conn->c_protocol != 0 ) {
407 version = op->o_conn->c_protocol;
408
409 } else {
410 version = LDAP_VERSION3;
411 }
412 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
413 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
414
415 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
416 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
417 META_BACK_TGT_CHASE_REFERRALS( mt ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
418
419 slap_client_keepalive(msc->msc_ld, &mt->mt_tls.sb_keepalive);
420
421 if ( mt->mt_tls.sb_tcp_user_timeout > 0 ) {
422 ldap_set_option( msc->msc_ld, LDAP_OPT_TCP_USER_TIMEOUT,
423 &mt->mt_tls.sb_tcp_user_timeout );
424 }
425
426
427
428 #ifdef HAVE_TLS
429 {
430 slap_bindconf *sb = NULL;
431
432 if ( ispriv ) {
433 sb = &mt->mt_idassert.si_bc;
434 } else {
435 sb = &mt->mt_tls;
436 }
437
438 bindconf_tls_set( sb, msc->msc_ld );
439
440 if ( !is_ldaps ) {
441 if ( META_BACK_TGT_USE_TLS( mt )
442 || ( op->o_conn->c_is_tls && META_BACK_TGT_PROPAGATE_TLS( mt ) ) )
443 {
444 do_start_tls = 1;
445 }
446 }
447 }
448
449 /* start TLS ("tls [try-]{start|propagate}" statement) */
450 if ( do_start_tls ) {
451 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
452 /*
453 * use asynchronous StartTLS; in case, chase referral
454 * FIXME: OpenLDAP does not return referral on StartTLS yet
455 */
456 int msgid;
457
458 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
459 if ( rs->sr_err == LDAP_SUCCESS ) {
460 LDAPMessage *res = NULL;
461 int rc, nretries = mt->mt_nretries;
462 struct timeval tv;
463
464 LDAP_BACK_TV_SET( &tv );
465
466 retry:;
467 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
468 switch ( rc ) {
469 case -1:
470 rs->sr_err = LDAP_UNAVAILABLE;
471 rs->sr_text = "Remote server down";
472 break;
473
474 case 0:
475 if ( nretries != 0 ) {
476 if ( nretries > 0 ) {
477 nretries--;
478 }
479 LDAP_BACK_TV_SET( &tv );
480 goto retry;
481 }
482 rs->sr_err = LDAP_OTHER;
483 rs->sr_text = "Timeout, no more retries";
484 break;
485
486 default:
487 /* only touch when activity actually took place... */
488 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
489 msc->msc_time = op->o_time;
490 }
491 break;
492 }
493
494 if ( rc == LDAP_RES_EXTENDED ) {
495 struct berval *data = NULL;
496
497 /* NOTE: right now, data is unused, so don't get it */
498 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
499 res, NULL, NULL /* &data */ , 0 );
500 if ( rs->sr_err == LDAP_SUCCESS ) {
501 int err;
502
503 /* FIXME: matched? referrals? response controls? */
504 rs->sr_err = ldap_parse_result( msc->msc_ld,
505 res, &err, NULL, NULL, NULL, NULL, 1 );
506 res = NULL;
507
508 if ( rs->sr_err == LDAP_SUCCESS ) {
509 rs->sr_err = err;
510 }
511 rs->sr_err = slap_map_api2result( rs );
512
513 /* FIXME: in case a referral
514 * is returned, should we try
515 * using it instead of the
516 * configured URI? */
517 if ( rs->sr_err == LDAP_SUCCESS ) {
518 rs->sr_err = ldap_install_tls( msc->msc_ld );
519
520 } else if ( rs->sr_err == LDAP_REFERRAL ) {
521 /* FIXME: LDAP_OPERATIONS_ERROR? */
522 rs->sr_err = LDAP_OTHER;
523 rs->sr_text = "Unwilling to chase referral "
524 "returned by Start TLS exop";
525 }
526
527 if ( data ) {
528 ber_bvfree( data );
529 }
530 }
531
532 } else {
533 rs->sr_err = LDAP_OTHER;
534 rs->sr_text = "Unknown response to StartTLS request :"
535 " an ExtendedResponse is expected";
536 }
537
538 if ( res != NULL ) {
539 ldap_msgfree( res );
540 }
541 }
542 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
543 /*
544 * use synchronous StartTLS
545 */
546 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
547 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
548
549 /* if StartTLS is requested, only attempt it if the URL
550 * is not "ldaps://"; this may occur not only in case
551 * of misconfiguration, but also when used in the chain
552 * overlay, where the "uri" can be parsed out of a referral */
553 if ( rs->sr_err == LDAP_SERVER_DOWN
554 || ( rs->sr_err != LDAP_SUCCESS
555 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
556 {
557
558 #ifdef DEBUG_205
559 Debug( LDAP_DEBUG_ANY,
560 "### %s meta_back_init_one_conn(TLS) "
561 "ldap_unbind_ext[%d] ld=%p\n",
562 op->o_log_prefix, candidate,
563 (void *)msc->msc_ld );
564 #endif /* DEBUG_205 */
565
566 /* need to trash a failed Start TLS */
567 meta_clear_one_candidate( op, mc, candidate );
568 goto error_return;
569 }
570 }
571 #endif /* HAVE_TLS */
572
573 /*
574 * Set the network timeout if set
575 */
576 if ( mt->mt_network_timeout != 0 ) {
577 struct timeval network_timeout;
578
579 network_timeout.tv_usec = 0;
580 network_timeout.tv_sec = mt->mt_network_timeout;
581
582 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
583 (void *)&network_timeout );
584 }
585
586 /*
587 * If the connection DN is not null, an attempt to rewrite it is made
588 */
589
590 if ( ispriv ) {
591 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
592 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
593 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
594 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
595 memset( msc->msc_cred.bv_val, 0,
596 msc->msc_cred.bv_len );
597 }
598 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
599 }
600 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
601
602 } else {
603 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
604 }
605
606 } else {
607 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
608 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
609 ber_memfree_x( msc->msc_cred.bv_val, NULL );
610 BER_BVZERO( &msc->msc_cred );
611 }
612 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
613 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
614 BER_BVZERO( &msc->msc_bound_ndn );
615 }
616 if ( !BER_BVISEMPTY( &op->o_ndn )
617 && SLAP_IS_AUTHZ_BACKEND( op )
618 && isauthz )
619 {
620 dc.target = mt;
621 dc.conn = op->o_conn;
622 dc.rs = rs;
623 dc.ctx = "bindDN";
624
625 /*
626 * Rewrite the bind dn if needed
627 */
628 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
629 &msc->msc_bound_ndn ) )
630 {
631
632 #ifdef DEBUG_205
633 Debug( LDAP_DEBUG_ANY,
634 "### %s meta_back_init_one_conn(rewrite) "
635 "ldap_unbind_ext[%d] ld=%p\n",
636 op->o_log_prefix, candidate,
637 (void *)msc->msc_ld );
638 #endif /* DEBUG_205 */
639
640 /* need to trash a connection not fully established */
641 meta_clear_one_candidate( op, mc, candidate );
642 goto error_return;
643 }
644
645 /* copy the DN if needed */
646 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
647 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
648 }
649
650 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
651
652 } else {
653 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
654 }
655 }
656
657 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
658
659 error_return:;
660 if ( dolock ) {
661 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
662 }
663 META_BACK_CONN_CREATING_CLEAR( msc );
664 if ( rs->sr_err == LDAP_SUCCESS ) {
665 /*
666 * Sets a cookie for the rewrite session
667 */
668 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
669 META_BACK_CONN_INITED_SET( msc );
670 }
671 if ( dolock ) {
672 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
673 }
674
675 if ( rs->sr_err != LDAP_SUCCESS ) {
676 /* Get the error message and print it in TRACE mode */
677 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
678 Log( LDAP_DEBUG_TRACE, ldap_syslog_level, "%s: meta_back_init_one_conn[%d] failed err=%d text=%s\n",
679 op->o_log_prefix, candidate, rs->sr_err, rs->sr_text );
680 }
681
682 rs->sr_err = slap_map_api2result( rs );
683 if ( sendok & LDAP_BACK_SENDERR ) {
684 send_ldap_result( op, rs );
685 }
686 }
687
688 return rs->sr_err;
689 }
690
691 /*
692 * meta_back_retry
693 *
694 * Retries one connection
695 */
696 int
meta_back_retry(Operation * op,SlapReply * rs,metaconn_t ** mcp,int candidate,ldap_back_send_t sendok)697 meta_back_retry(
698 Operation *op,
699 SlapReply *rs,
700 metaconn_t **mcp,
701 int candidate,
702 ldap_back_send_t sendok )
703 {
704 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
705 metatarget_t *mt = mi->mi_targets[ candidate ];
706 metaconn_t *mc = *mcp;
707 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
708 int rc = LDAP_UNAVAILABLE,
709 binding,
710 quarantine = 1;
711
712 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
713
714 assert( !META_BACK_CONN_CREATING( msc ) );
715 binding = LDAP_BACK_CONN_BINDING( msc );
716 LDAP_BACK_CONN_BINDING_CLEAR( msc );
717
718 assert( mc->mc_refcnt > 0 );
719 if ( mc->mc_refcnt == 1 ) {
720 struct berval save_cred;
721
722 if ( LogTest( LDAP_DEBUG_ANY ) ) {
723 /* this lock is required; however,
724 * it's invoked only when logging is on */
725 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
726 Debug(LDAP_DEBUG_ANY,
727 "%s meta_back_retry[%d]: retrying URI=\"%s\" DN=\"%s\".\n",
728 op->o_log_prefix, candidate, mt->mt_uri,
729 BER_BVISNULL(&msc->msc_bound_ndn) ? "" : msc->msc_bound_ndn.bv_val );
730 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
731 }
732
733 /* save credentials, if any, for later use;
734 * meta_clear_one_candidate() would free them */
735 save_cred = msc->msc_cred;
736 BER_BVZERO( &msc->msc_cred );
737
738 meta_clear_one_candidate( op, mc, candidate );
739 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
740
741 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
742
743 /* mc here must be the regular mc, reset and ready for init */
744 rc = meta_back_init_one_conn( op, rs, mc, candidate,
745 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
746
747 /* restore credentials, if any and if needed;
748 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
749 * if no msc_bound_ndn is restored, destroy credentials */
750 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
751 && BER_BVISNULL( &msc->msc_cred ) )
752 {
753 msc->msc_cred = save_cred;
754
755 } else if ( !BER_BVISNULL( &save_cred ) ) {
756 memset( save_cred.bv_val, 0, save_cred.bv_len );
757 ber_memfree_x( save_cred.bv_val, NULL );
758 }
759
760 /* restore the "binding" flag, in case */
761 if ( binding ) {
762 LDAP_BACK_CONN_BINDING_SET( msc );
763 }
764
765 if ( rc == LDAP_SUCCESS ) {
766 quarantine = 0;
767 LDAP_BACK_CONN_BINDING_SET( msc ); binding = 1;
768 rc = meta_back_single_dobind( op, rs, mcp, candidate,
769 sendok, mt->mt_nretries, 0 );
770
771 Debug( LDAP_DEBUG_ANY,
772 "%s meta_back_retry[%d]: "
773 "meta_back_single_dobind=%d\n",
774 op->o_log_prefix, candidate, rc );
775 if ( rc == LDAP_SUCCESS ) {
776 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
777 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
778 {
779 LDAP_BACK_CONN_ISBOUND_SET( msc );
780
781 } else {
782 LDAP_BACK_CONN_ISANON_SET( msc );
783 }
784
785 /* when bound, dispose of the "binding" flag */
786 if ( binding ) {
787 LDAP_BACK_CONN_BINDING_CLEAR( msc );
788 }
789 }
790 }
791
792 #if 0 /* ITS#7591, following stmt drops needed result msgs */
793 /* don't send twice */
794 sendok &= ~LDAP_BACK_SENDERR;
795 #endif
796 }
797
798 if ( rc != LDAP_SUCCESS ) {
799 SlapReply *candidates = meta_back_candidates_get( op );
800
801 candidates[ candidate ].sr_err = rc;
802
803 if ( *mcp != NULL ) {
804 if ( mc->mc_refcnt == 1 ) {
805 if ( binding ) {
806 LDAP_BACK_CONN_BINDING_CLEAR( msc );
807 }
808 (void)meta_clear_one_candidate( op, mc, candidate );
809 }
810
811 LDAP_BACK_CONN_TAINTED_SET( mc );
812 /* only release if mandatory; otherwise
813 * let the caller do what's best before
814 * releasing */
815 if ( META_BACK_ONERR_STOP( mi ) ) {
816 meta_back_release_conn_lock( mi, mc, 0 );
817 *mcp = NULL;
818
819 } else {
820 #if META_BACK_PRINT_CONNTREE > 0
821 meta_back_print_conntree( mi, ">>> meta_back_retry" );
822 #endif /* META_BACK_PRINT_CONNTREE */
823
824 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
825 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
826 if ( mc->mc_q.tqe_prev != NULL ) {
827 assert( LDAP_BACK_CONN_CACHED( mc ) );
828 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
829 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
830 mc, mc_q );
831 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
832 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
833
834 } else {
835 assert( !LDAP_BACK_CONN_CACHED( mc ) );
836 }
837
838 } else {
839 /* FIXME: check if in tree, for consistency? */
840 (void)ldap_tavl_delete( &mi->mi_conninfo.lai_tree,
841 ( caddr_t )mc, meta_back_conndnmc_cmp );
842 }
843 LDAP_BACK_CONN_CACHED_CLEAR( mc );
844
845 #if META_BACK_PRINT_CONNTREE > 0
846 meta_back_print_conntree( mi, "<<< meta_back_retry" );
847 #endif /* META_BACK_PRINT_CONNTREE */
848 }
849 }
850
851 if ( sendok & LDAP_BACK_SENDERR ) {
852 rs->sr_err = rc;
853 rs->sr_text = "Unable to retry";
854 send_ldap_result( op, rs );
855 }
856 }
857
858 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
859 meta_back_quarantine( op, rs, candidate );
860 }
861
862 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
863
864 return rc == LDAP_SUCCESS ? 1 : 0;
865 }
866
867 /*
868 * callback for unique candidate selection
869 */
870 static int
meta_back_conn_cb(Operation * op,SlapReply * rs)871 meta_back_conn_cb( Operation *op, SlapReply *rs )
872 {
873 assert( op->o_tag == LDAP_REQ_SEARCH );
874
875 switch ( rs->sr_type ) {
876 case REP_SEARCH:
877 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
878 break;
879
880 case REP_SEARCHREF:
881 case REP_RESULT:
882 break;
883
884 default:
885 return rs->sr_err;
886 }
887
888 return 0;
889 }
890
891
892 static int
meta_back_get_candidate(Operation * op,SlapReply * rs,struct berval * ndn)893 meta_back_get_candidate(
894 Operation *op,
895 SlapReply *rs,
896 struct berval *ndn )
897 {
898 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
899 long candidate;
900
901 /*
902 * tries to get a unique candidate
903 * (takes care of default target)
904 */
905 candidate = meta_back_select_unique_candidate( mi, ndn );
906
907 /*
908 * if any is found, inits the connection
909 */
910 if ( candidate == META_TARGET_NONE ) {
911 rs->sr_err = LDAP_NO_SUCH_OBJECT;
912 rs->sr_text = "No suitable candidate target found";
913
914 } else if ( candidate == META_TARGET_MULTIPLE ) {
915 Operation op2 = *op;
916 SlapReply rs2 = { REP_RESULT };
917 slap_callback cb2 = { 0 };
918 int rc;
919
920 /* try to get a unique match for the request ndn
921 * among the multiple candidates available */
922 op2.o_tag = LDAP_REQ_SEARCH;
923 op2.o_req_dn = *ndn;
924 op2.o_req_ndn = *ndn;
925 op2.ors_scope = LDAP_SCOPE_BASE;
926 op2.ors_deref = LDAP_DEREF_NEVER;
927 op2.ors_attrs = slap_anlist_no_attrs;
928 op2.ors_attrsonly = 0;
929 op2.ors_limit = NULL;
930 op2.ors_slimit = 1;
931 op2.ors_tlimit = SLAP_NO_LIMIT;
932
933 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
934 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
935
936 op2.o_callback = &cb2;
937 cb2.sc_response = meta_back_conn_cb;
938 cb2.sc_private = (void *)&candidate;
939
940 rc = op->o_bd->be_search( &op2, &rs2 );
941
942 switch ( rs2.sr_err ) {
943 case LDAP_SUCCESS:
944 default:
945 rs->sr_err = rs2.sr_err;
946 break;
947
948 case LDAP_SIZELIMIT_EXCEEDED:
949 /* if multiple candidates can serve the operation,
950 * and a default target is defined, and it is
951 * a candidate, try using it (FIXME: YMMV) */
952 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
953 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
954 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
955 {
956 candidate = mi->mi_defaulttarget;
957 rs->sr_err = LDAP_SUCCESS;
958 rs->sr_text = NULL;
959
960 } else {
961 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
962 rs->sr_text = "Unable to select unique candidate target";
963 }
964 break;
965 }
966
967 } else {
968 rs->sr_err = LDAP_SUCCESS;
969 }
970
971 return candidate;
972 }
973
974 static void *meta_back_candidates_dummy;
975
976 static void
meta_back_candidates_keyfree(void * key,void * data)977 meta_back_candidates_keyfree(
978 void *key,
979 void *data )
980 {
981 metacandidates_t *mc = (metacandidates_t *)data;
982
983 ber_memfree_x( mc->mc_candidates, NULL );
984 ber_memfree_x( data, NULL );
985 }
986
987 SlapReply *
meta_back_candidates_get(Operation * op)988 meta_back_candidates_get( Operation *op )
989 {
990 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
991 metacandidates_t *mc;
992
993 if ( op->o_threadctx ) {
994 void *data = NULL;
995
996 ldap_pvt_thread_pool_getkey( op->o_threadctx,
997 &meta_back_candidates_dummy, &data, NULL );
998 mc = (metacandidates_t *)data;
999
1000 } else {
1001 mc = mi->mi_candidates;
1002 }
1003
1004 if ( mc == NULL ) {
1005 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1006 mc->mc_ntargets = mi->mi_ntargets;
1007 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1008 if ( op->o_threadctx ) {
1009 void *data = NULL;
1010
1011 data = (void *)mc;
1012 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1013 &meta_back_candidates_dummy, data,
1014 meta_back_candidates_keyfree,
1015 NULL, NULL );
1016
1017 } else {
1018 mi->mi_candidates = mc;
1019 }
1020
1021 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1022 /* NOTE: in the future, may want to allow back-config
1023 * to add/remove targets from back-meta... */
1024 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1025 sizeof( SlapReply ) * mi->mi_ntargets );
1026 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1027 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1028 mc->mc_ntargets = mi->mi_ntargets;
1029 }
1030
1031 return mc->mc_candidates;
1032 }
1033
1034 /*
1035 * meta_back_getconn
1036 *
1037 * Prepares the connection structure
1038 *
1039 * RATIONALE:
1040 *
1041 * - determine what DN is being requested:
1042 *
1043 * op requires candidate checks
1044 *
1045 * add unique parent of o_req_ndn
1046 * bind unique^*[/all] o_req_ndn [no check]
1047 * compare unique^+ o_req_ndn
1048 * delete unique o_req_ndn
1049 * modify unique o_req_ndn
1050 * search any o_req_ndn
1051 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1052 *
1053 * - for ops that require the candidate to be unique, in case of multiple
1054 * occurrences an internal search with sizeLimit=1 is performed
1055 * if a unique candidate can actually be determined. If none is found,
1056 * the operation aborts; if multiple are found, the default target
1057 * is used if defined and candidate; otherwise the operation aborts.
1058 *
1059 * *^note: actually, the bind operation is handled much like a search;
1060 * i.e. the bind is broadcast to all candidate targets.
1061 *
1062 * +^note: actually, the compare operation is handled much like a search;
1063 * i.e. the compare is broadcast to all candidate targets, while checking
1064 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1065 * returned.
1066 */
1067 metaconn_t *
meta_back_getconn(Operation * op,SlapReply * rs,int * candidate,ldap_back_send_t sendok)1068 meta_back_getconn(
1069 Operation *op,
1070 SlapReply *rs,
1071 int *candidate,
1072 ldap_back_send_t sendok )
1073 {
1074 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1075 metaconn_t *mc = NULL,
1076 mc_curr = {{ 0 }};
1077 int cached = META_TARGET_NONE,
1078 i = META_TARGET_NONE,
1079 err = LDAP_SUCCESS,
1080 new_conn = 0,
1081 ncandidates = 0;
1082
1083
1084 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1085 enum {
1086 META_DNTYPE_ENTRY,
1087 META_DNTYPE_PARENT,
1088 META_DNTYPE_NEWPARENT
1089 } dn_type = META_DNTYPE_ENTRY;
1090 struct berval ndn = op->o_req_ndn,
1091 pndn;
1092
1093 SlapReply *candidates = meta_back_candidates_get( op );
1094
1095 /* Internal searches are privileged and shared. So is root. */
1096 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1097 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1098 || op->o_do_not_cache || be_isroot( op ) )
1099 {
1100 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1101 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1102 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1103
1104 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1105 {
1106 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1107 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1108 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1109
1110 } else {
1111 mc_curr.mc_local_ndn = op->o_ndn;
1112
1113 /* Explicit binds must not be shared */
1114 if ( !BER_BVISEMPTY( &op->o_ndn )
1115 || op->o_tag == LDAP_REQ_BIND
1116 || SLAP_IS_AUTHZ_BACKEND( op ) )
1117 {
1118 mc_curr.mc_conn = op->o_conn;
1119
1120 } else {
1121 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1122 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1123 }
1124 }
1125
1126 /* Explicit Bind requests always get their own conn */
1127 if ( sendok & LDAP_BACK_BINDING ) {
1128 mc_curr.mc_conn = op->o_conn;
1129
1130 } else {
1131 /* Searches for a metaconn in the avl tree */
1132 retry_lock:;
1133 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1134 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1135 /* lookup a conn that's not binding */
1136 LDAP_TAILQ_FOREACH( mc,
1137 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1138 mc_q )
1139 {
1140 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1141 break;
1142 }
1143 }
1144
1145 if ( mc != NULL ) {
1146 /* move to tail of queue */
1147 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1148 mc_conn_priv_q ) )
1149 {
1150 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1151 mc, mc_q );
1152 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1153 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1154 mc, mc_q );
1155 }
1156
1157 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1158 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1159 {
1160 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1161 }
1162
1163
1164 } else {
1165 mc = (metaconn_t *)ldap_tavl_find( mi->mi_conninfo.lai_tree,
1166 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1167 }
1168
1169 if ( mc ) {
1170 /* catch taint errors */
1171 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1172
1173 /* Don't reuse connections while they're still binding
1174 * NOTE: only makes sense for binds */
1175 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1176 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1177 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1178
1179 ldap_pvt_thread_yield();
1180 goto retry_lock;
1181 }
1182
1183 /* release conn, and create a temporary */
1184 mc = NULL;
1185
1186 } else {
1187 if ( mc->mc_refcnt == 0 && (( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1188 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout )) )
1189 {
1190 #if META_BACK_PRINT_CONNTREE > 0
1191 meta_back_print_conntree( mi,
1192 ">>> meta_back_getconn(expired)" );
1193 #endif /* META_BACK_PRINT_CONNTREE */
1194
1195 /* don't let anyone else use this expired connection */
1196 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1197 if ( mc->mc_q.tqe_prev != NULL ) {
1198 assert( LDAP_BACK_CONN_CACHED( mc ) );
1199 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1200 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1201 mc, mc_q );
1202 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1203 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1204
1205 } else {
1206 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1207 }
1208
1209 } else {
1210 (void)ldap_tavl_delete( &mi->mi_conninfo.lai_tree,
1211 (caddr_t)mc, meta_back_conndnmc_cmp );
1212 }
1213
1214 #if META_BACK_PRINT_CONNTREE > 0
1215 meta_back_print_conntree( mi,
1216 "<<< meta_back_getconn(expired)" );
1217 #endif /* META_BACK_PRINT_CONNTREE */
1218 LDAP_BACK_CONN_TAINTED_SET( mc );
1219 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1220
1221 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1222 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1223 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1224
1225 Debug( LDAP_DEBUG_TRACE,
1226 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1227 op->o_log_prefix, (void *)mc, buf );
1228 }
1229 }
1230
1231 mc->mc_refcnt++;
1232 }
1233 }
1234 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1235 }
1236
1237 switch ( op->o_tag ) {
1238 case LDAP_REQ_ADD:
1239 /* if we go to selection, the entry must not exist,
1240 * and we must be able to resolve the parent */
1241 dn_type = META_DNTYPE_PARENT;
1242 dnParent( &ndn, &pndn );
1243 break;
1244
1245 case LDAP_REQ_MODRDN:
1246 /* if nnewSuperior is not NULL, it must resolve
1247 * to the same candidate as the req_ndn */
1248 if ( op->orr_nnewSup ) {
1249 dn_type = META_DNTYPE_NEWPARENT;
1250 }
1251 break;
1252
1253 case LDAP_REQ_BIND:
1254 /* if bound as rootdn, the backend must bind to all targets
1255 * with the administrative identity
1256 * (unless pseoudoroot-bind-defer is TRUE) */
1257 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1258 op_type = META_OP_REQUIRE_ALL;
1259 }
1260 break;
1261
1262 case LDAP_REQ_COMPARE:
1263 case LDAP_REQ_DELETE:
1264 case LDAP_REQ_MODIFY:
1265 /* just a unique candidate */
1266 break;
1267
1268 case LDAP_REQ_SEARCH:
1269 /* allow multiple candidates for the searchBase */
1270 op_type = META_OP_ALLOW_MULTIPLE;
1271 break;
1272
1273 default:
1274 /* right now, just break (exop?) */
1275 break;
1276 }
1277
1278 /*
1279 * require all connections ...
1280 */
1281 if ( op_type == META_OP_REQUIRE_ALL ) {
1282
1283 /* Looks like we didn't get a bind. Open a new session... */
1284 if ( mc == NULL ) {
1285 assert( new_conn == 0 );
1286 mc = metaconn_alloc( op );
1287 mc->mc_conn = mc_curr.mc_conn;
1288 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1289 new_conn = 1;
1290 if ( sendok & LDAP_BACK_BINDING ) {
1291 LDAP_BACK_CONN_BINDING_SET( mc );
1292 }
1293 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1294 LDAP_BACK_CONN_ISPRIV_SET( mc );
1295
1296 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1297 LDAP_BACK_CONN_ISANON_SET( mc );
1298 }
1299
1300 } else if ( 0 ) {
1301 /* TODO: if any of the connections is binding,
1302 * release mc and create a new one */
1303 }
1304
1305 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1306 /*
1307 * The target is activated; if needed, it is
1308 * also init'd
1309 */
1310 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1311 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1312 LDAP_BACK_DONTSEND, !new_conn );
1313 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1314 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1315 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1316 }
1317 META_CANDIDATE_SET( &candidates[ i ] );
1318 ncandidates++;
1319
1320 } else {
1321
1322 /*
1323 * FIXME: in case one target cannot
1324 * be init'd, should the other ones
1325 * be tried?
1326 */
1327 META_CANDIDATE_RESET( &candidates[ i ] );
1328 err = candidates[ i ].sr_err;
1329 continue;
1330 }
1331 }
1332
1333 if ( ncandidates == 0 ) {
1334 if ( new_conn ) {
1335 mc->mc_refcnt = 0;
1336 meta_back_conn_free( mc );
1337
1338 } else {
1339 meta_back_release_conn( mi, mc );
1340 }
1341
1342 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1343 rs->sr_text = "Unable to select valid candidates";
1344
1345 if ( sendok & LDAP_BACK_SENDERR ) {
1346 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1347 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1348 }
1349 send_ldap_result( op, rs );
1350 rs->sr_matched = NULL;
1351 }
1352
1353 return NULL;
1354 }
1355
1356 goto done;
1357 }
1358
1359 /*
1360 * looks in cache, if any
1361 */
1362 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1363 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1364 }
1365
1366 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1367 metatarget_t *mt = NULL;
1368 metasingleconn_t *msc = NULL;
1369
1370 int j;
1371
1372 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1373 META_CANDIDATE_RESET( &candidates[ j ] );
1374 }
1375
1376 /*
1377 * tries to get a unique candidate
1378 * (takes care of default target)
1379 */
1380 if ( i == META_TARGET_NONE ) {
1381 i = meta_back_get_candidate( op, rs, &ndn );
1382
1383 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1384 i = meta_back_get_candidate( op, rs, &pndn );
1385 }
1386
1387 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1388 if ( mc != NULL ) {
1389 meta_back_release_conn( mi, mc );
1390 }
1391
1392 if ( sendok & LDAP_BACK_SENDERR ) {
1393 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1394 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1395 }
1396 send_ldap_result( op, rs );
1397 rs->sr_matched = NULL;
1398 }
1399
1400 return NULL;
1401 }
1402 }
1403
1404 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1405 {
1406 if ( mc != NULL ) {
1407 meta_back_release_conn( mi, mc );
1408 }
1409
1410 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1411 rs->sr_text = "Cross-target rename not supported";
1412 if ( sendok & LDAP_BACK_SENDERR ) {
1413 send_ldap_result( op, rs );
1414 }
1415
1416 return NULL;
1417 }
1418
1419 Debug( LDAP_DEBUG_TRACE,
1420 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1421 i, op->o_req_ndn.bv_val );
1422
1423 if ( mc == NULL ) {
1424 /* Retries searching for a metaconn in the avl tree
1425 * the reason is that the connection might have been
1426 * created by meta_back_get_candidate() */
1427 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1428 retry_lock2:;
1429 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1430 mc = (metaconn_t *)ldap_tavl_find( mi->mi_conninfo.lai_tree,
1431 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1432 if ( mc != NULL ) {
1433 /* catch taint errors */
1434 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1435
1436 /* Don't reuse connections while they're still binding */
1437 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1438 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1439 {
1440 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1441 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1442 ldap_pvt_thread_yield();
1443 goto retry_lock2;
1444 }
1445
1446 mc = NULL;
1447
1448 } else {
1449 mc->mc_refcnt++;
1450 }
1451 }
1452 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1453 }
1454
1455 /* Looks like we didn't get a bind. Open a new session... */
1456 if ( mc == NULL ) {
1457 assert( new_conn == 0 );
1458 mc = metaconn_alloc( op );
1459 mc->mc_conn = mc_curr.mc_conn;
1460 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1461 new_conn = 1;
1462 if ( sendok & LDAP_BACK_BINDING ) {
1463 LDAP_BACK_CONN_BINDING_SET( mc );
1464 }
1465 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1466 LDAP_BACK_CONN_ISPRIV_SET( mc );
1467
1468 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1469 LDAP_BACK_CONN_ISANON_SET( mc );
1470 }
1471 }
1472 }
1473
1474 /*
1475 * Clear all other candidates
1476 */
1477 ( void )meta_clear_unused_candidates( op, i );
1478
1479 mt = mi->mi_targets[ i ];
1480 msc = &mc->mc_conns[ i ];
1481
1482 /*
1483 * The target is activated; if needed, it is
1484 * also init'd. In case of error, meta_back_init_one_conn
1485 * sends the appropriate result.
1486 */
1487 err = meta_back_init_one_conn( op, rs, mc, i,
1488 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1489 if ( err != LDAP_SUCCESS ) {
1490 /*
1491 * FIXME: in case one target cannot
1492 * be init'd, should the other ones
1493 * be tried?
1494 */
1495 META_CANDIDATE_RESET( &candidates[ i ] );
1496 if ( new_conn ) {
1497 mc->mc_refcnt = 0;
1498 meta_back_conn_free( mc );
1499
1500 } else {
1501 meta_back_release_conn( mi, mc );
1502 }
1503 return NULL;
1504 }
1505
1506 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1507 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1508 }
1509
1510 candidates[ i ].sr_err = LDAP_SUCCESS;
1511 META_CANDIDATE_SET( &candidates[ i ] );
1512 ncandidates++;
1513
1514 if ( candidate ) {
1515 *candidate = i;
1516 }
1517
1518 /*
1519 * if no unique candidate ...
1520 */
1521 } else {
1522
1523 /* Looks like we didn't get a bind. Open a new session... */
1524 if ( mc == NULL ) {
1525 assert( new_conn == 0 );
1526 mc = metaconn_alloc( op );
1527 mc->mc_conn = mc_curr.mc_conn;
1528 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1529 new_conn = 1;
1530 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1531 LDAP_BACK_CONN_ISPRIV_SET( mc );
1532
1533 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1534 LDAP_BACK_CONN_ISANON_SET( mc );
1535 }
1536 }
1537
1538 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1539 metatarget_t *mt = mi->mi_targets[ i ];
1540
1541 META_CANDIDATE_RESET( &candidates[ i ] );
1542
1543 if ( i == cached
1544 || meta_back_is_candidate( mt, &op->o_req_ndn,
1545 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1546 {
1547
1548 /*
1549 * The target is activated; if needed, it is
1550 * also init'd
1551 */
1552 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1553 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1554 LDAP_BACK_DONTSEND, !new_conn );
1555 candidates[ i ].sr_err = lerr;
1556 if ( lerr == LDAP_SUCCESS ) {
1557 META_CANDIDATE_SET( &candidates[ i ] );
1558 ncandidates++;
1559
1560 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1561 op->o_log_prefix, i );
1562
1563 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1564 META_CANDIDATE_SET( &candidates[ i ] );
1565
1566 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1567 op->o_log_prefix, i,
1568 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1569
1570 } else {
1571
1572 /*
1573 * FIXME: in case one target cannot
1574 * be init'd, should the other ones
1575 * be tried?
1576 */
1577 if ( new_conn ) {
1578 ( void )meta_clear_one_candidate( op, mc, i );
1579 }
1580 /* leave the target candidate, but record the error for later use */
1581 err = lerr;
1582
1583 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1584 Log( LDAP_DEBUG_TRACE, ldap_syslog_level, "%s: meta_back_getconn[%d] quarantined err=%d text=%s\n",
1585 op->o_log_prefix, i, lerr, rs->sr_text );
1586
1587 } else {
1588 Log( LDAP_DEBUG_ANY, ldap_syslog, "%s: meta_back_getconn[%d] failed err=%d text=%s\n",
1589 op->o_log_prefix, i, lerr, rs->sr_text );
1590 }
1591
1592 if ( META_BACK_ONERR_STOP( mi ) ) {
1593 if ( sendok & LDAP_BACK_SENDERR ) {
1594 send_ldap_result( op, rs );
1595 }
1596 if ( new_conn ) {
1597 mc->mc_refcnt = 0;
1598 meta_back_conn_free( mc );
1599
1600 } else {
1601 meta_back_release_conn( mi, mc );
1602 }
1603
1604 return NULL;
1605 }
1606
1607 continue;
1608 }
1609
1610 } else {
1611 if ( new_conn ) {
1612 ( void )meta_clear_one_candidate( op, mc, i );
1613 }
1614 }
1615 }
1616
1617 if ( ncandidates == 0 ) {
1618 if ( new_conn ) {
1619 mc->mc_refcnt = 0;
1620 meta_back_conn_free( mc );
1621
1622 } else {
1623 meta_back_release_conn( mi, mc );
1624 }
1625
1626 if ( rs->sr_err == LDAP_SUCCESS ) {
1627 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1628 rs->sr_text = "Unable to select valid candidates";
1629 }
1630
1631 if ( sendok & LDAP_BACK_SENDERR ) {
1632 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1633 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1634 }
1635 send_ldap_result( op, rs );
1636 rs->sr_matched = NULL;
1637 }
1638
1639 return NULL;
1640 }
1641 }
1642
1643 done:;
1644 /* clear out meta_back_init_one_conn non-fatal errors */
1645 rs->sr_err = LDAP_SUCCESS;
1646 rs->sr_text = NULL;
1647
1648 /* touch the timestamp */
1649 if ( mi->mi_idle_timeout != 0 ) {
1650 mc->mc_time = op->o_time;
1651 }
1652
1653 if ( new_conn ) {
1654 if ( mi->mi_conn_ttl ) {
1655 mc->mc_create_time = op->o_time;
1656 }
1657
1658 /*
1659 * Inserts the newly created metaconn in the avl tree
1660 */
1661 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1662 #if META_BACK_PRINT_CONNTREE > 0
1663 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1664 #endif /* META_BACK_PRINT_CONNTREE */
1665
1666 err = 0;
1667 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1668 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1669 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1670 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1671 LDAP_BACK_CONN_CACHED_SET( mc );
1672
1673 } else {
1674 LDAP_BACK_CONN_TAINTED_SET( mc );
1675 }
1676 rs->sr_err = 0;
1677
1678 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1679 err = ldap_tavl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1680 meta_back_conndn_cmp, meta_back_conndn_dup );
1681 LDAP_BACK_CONN_CACHED_SET( mc );
1682 }
1683
1684 #if META_BACK_PRINT_CONNTREE > 0
1685 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1686 #endif /* META_BACK_PRINT_CONNTREE */
1687 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1688
1689 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1690 /*
1691 * Err could be -1 in case a duplicate metaconn is inserted
1692 */
1693 switch ( err ) {
1694 case 0:
1695 break;
1696
1697 case -1:
1698 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1699 /* duplicate: free and try to get the newly created one */
1700 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1701 mc->mc_refcnt = 0;
1702 meta_back_conn_free( mc );
1703
1704 new_conn = 0;
1705 goto retry_lock;
1706 }
1707
1708 LDAP_BACK_CONN_TAINTED_SET( mc );
1709 break;
1710
1711 default:
1712 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1713 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1714 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1715 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1716
1717 Debug( LDAP_DEBUG_ANY,
1718 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1719 op->o_log_prefix, ncandidates, buf );
1720 }
1721
1722 mc->mc_refcnt = 0;
1723 meta_back_conn_free( mc );
1724
1725 rs->sr_err = LDAP_OTHER;
1726 rs->sr_text = "Proxy bind collision";
1727 if ( sendok & LDAP_BACK_SENDERR ) {
1728 send_ldap_result( op, rs );
1729 }
1730 return NULL;
1731 }
1732 }
1733
1734 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1735 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1736 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1737
1738 Debug( LDAP_DEBUG_TRACE,
1739 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1740 op->o_log_prefix, ncandidates, buf );
1741 }
1742
1743 } else {
1744 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1745 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1746 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1747
1748 Debug( LDAP_DEBUG_TRACE,
1749 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1750 op->o_log_prefix, ncandidates, buf );
1751 }
1752 }
1753
1754 return mc;
1755 }
1756
1757 void
meta_back_release_conn_lock(metainfo_t * mi,metaconn_t * mc,int dolock)1758 meta_back_release_conn_lock(
1759 metainfo_t *mi,
1760 metaconn_t *mc,
1761 int dolock )
1762 {
1763 assert( mc != NULL );
1764
1765 if ( dolock ) {
1766 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1767 }
1768 assert( mc->mc_refcnt > 0 );
1769 mc->mc_refcnt--;
1770 /* NOTE: the connection is removed if either it is tainted
1771 * or if it is shared and no one else is using it. This needs
1772 * to occur because for intrinsic reasons cached connections
1773 * that are not privileged would live forever and pollute
1774 * the connection space (and eat up resources). Maybe this
1775 * should be configurable... */
1776 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1777 #if META_BACK_PRINT_CONNTREE > 0
1778 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1779 #endif /* META_BACK_PRINT_CONNTREE */
1780
1781 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1782 if ( mc->mc_q.tqe_prev != NULL ) {
1783 assert( LDAP_BACK_CONN_CACHED( mc ) );
1784 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1785 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1786 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1787 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1788
1789 } else {
1790 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1791 }
1792
1793 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1794 metaconn_t *tmpmc;
1795
1796 tmpmc = ldap_tavl_delete( &mi->mi_conninfo.lai_tree,
1797 ( caddr_t )mc, meta_back_conndnmc_cmp );
1798
1799 /* Overparanoid, but useful... */
1800 assert( tmpmc == NULL || tmpmc == mc );
1801 }
1802
1803 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1804
1805 #if META_BACK_PRINT_CONNTREE > 0
1806 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1807 #endif /* META_BACK_PRINT_CONNTREE */
1808
1809 if ( mc->mc_refcnt == 0 ) {
1810 meta_back_conn_free( mc );
1811 mc = NULL;
1812 }
1813 }
1814
1815 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1816 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1817 }
1818
1819 if ( dolock ) {
1820 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1821 }
1822 }
1823
1824 void
meta_back_quarantine(Operation * op,SlapReply * rs,int candidate)1825 meta_back_quarantine(
1826 Operation *op,
1827 SlapReply *rs,
1828 int candidate )
1829 {
1830 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1831 metatarget_t *mt = mi->mi_targets[ candidate ];
1832
1833 slap_retry_info_t *ri = &mt->mt_quarantine;
1834
1835 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1836
1837 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1838 time_t new_last = slap_get_time();
1839
1840 switch ( mt->mt_isquarantined ) {
1841 case LDAP_BACK_FQ_NO:
1842 if ( ri->ri_last == new_last ) {
1843 goto done;
1844 }
1845
1846 Debug( LDAP_DEBUG_ANY,
1847 "%s meta_back_quarantine[%d]: enter.\n",
1848 op->o_log_prefix, candidate );
1849
1850 ri->ri_idx = 0;
1851 ri->ri_count = 0;
1852 break;
1853
1854 case LDAP_BACK_FQ_RETRYING:
1855 Debug(LDAP_DEBUG_ANY,
1856 "%s meta_back_quarantine[%d]: block #%d try #%d failed.\n",
1857 op->o_log_prefix, candidate, ri->ri_idx,
1858 ri->ri_count );
1859
1860 ++ri->ri_count;
1861 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1862 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1863 {
1864 ri->ri_count = 0;
1865 ++ri->ri_idx;
1866 }
1867 break;
1868
1869 default:
1870 goto done;
1871 }
1872
1873 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1874 ri->ri_last = new_last;
1875
1876 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1877 Debug( LDAP_DEBUG_ANY,
1878 "%s meta_back_quarantine[%d]: exit.\n",
1879 op->o_log_prefix, candidate );
1880
1881 if ( mi->mi_quarantine_f ) {
1882 (void)mi->mi_quarantine_f( mi, candidate,
1883 mi->mi_quarantine_p );
1884 }
1885
1886 ri->ri_count = 0;
1887 ri->ri_idx = 0;
1888 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1889 }
1890
1891 done:;
1892 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );
1893 }
1894