1 /* $NetBSD: conn.c,v 1.3 2021/08/14 16:15:00 christos Exp $ */
2
3 /* $OpenLDAP$ */
4 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 *
6 * Copyright 1999-2021 The OpenLDAP Foundation.
7 * Portions Copyright 2001-2003 Pierangelo Masarati.
8 * Portions Copyright 1999-2003 Howard Chu.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted only as authorized by the OpenLDAP
13 * Public License.
14 *
15 * A copy of this license is available in the file LICENSE in the
16 * top-level directory of the distribution or, alternatively, at
17 * <http://www.OpenLDAP.org/license.html>.
18 */
19 /* ACKNOWLEDGEMENTS:
20 * This work was initially developed by the Howard Chu for inclusion
21 * in OpenLDAP Software and subsequently enhanced by Pierangelo
22 * Masarati.
23 */
24
25 #include <sys/cdefs.h>
26 __RCSID("$NetBSD: conn.c,v 1.3 2021/08/14 16:15:00 christos Exp $");
27
28 #include "portable.h"
29
30 #include <stdio.h>
31
32 #include <ac/errno.h>
33 #include <ac/socket.h>
34 #include <ac/string.h>
35
36
37 #define AVL_INTERNAL
38 #include "slap.h"
39 #include "../back-ldap/back-ldap.h"
40 #include "back-meta.h"
41
42 /*
43 * meta_back_conndn_cmp
44 *
45 * compares two struct metaconn based on the value of the conn pointer
46 * and of the local DN; used by avl stuff
47 */
48 int
meta_back_conndn_cmp(const void * c1,const void * c2)49 meta_back_conndn_cmp(
50 const void *c1,
51 const void *c2 )
52 {
53 metaconn_t *mc1 = ( metaconn_t * )c1;
54 metaconn_t *mc2 = ( metaconn_t * )c2;
55 int rc;
56
57 /* If local DNs don't match, it is definitely not a match */
58 /* For shared sessions, conn is NULL. Only explicitly
59 * bound sessions will have non-NULL conn.
60 */
61 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
62 if ( rc == 0 ) {
63 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
64 }
65
66 return rc;
67 }
68
69 /*
70 * meta_back_conndnmc_cmp
71 *
72 * compares two struct metaconn based on the value of the conn pointer,
73 * the local DN and the struct pointer; used by avl stuff
74 */
75 static int
meta_back_conndnmc_cmp(const void * c1,const void * c2)76 meta_back_conndnmc_cmp(
77 const void *c1,
78 const void *c2 )
79 {
80 metaconn_t *mc1 = ( metaconn_t * )c1;
81 metaconn_t *mc2 = ( metaconn_t * )c2;
82 int rc;
83
84 /* If local DNs don't match, it is definitely not a match */
85 /* For shared sessions, conn is NULL. Only explicitly
86 * bound sessions will have non-NULL conn.
87 */
88 rc = SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
89 if ( rc == 0 ) {
90 rc = ber_bvcmp( &mc1->mc_local_ndn, &mc2->mc_local_ndn );
91 if ( rc == 0 ) {
92 rc = SLAP_PTRCMP( mc1, mc2 );
93 }
94 }
95
96 return rc;
97 }
98
99 /*
100 * meta_back_conn_cmp
101 *
102 * compares two struct metaconn based on the value of the conn pointer;
103 * used by avl stuff
104 */
105 int
meta_back_conn_cmp(const void * c1,const void * c2)106 meta_back_conn_cmp(
107 const void *c1,
108 const void *c2 )
109 {
110 metaconn_t *mc1 = ( metaconn_t * )c1;
111 metaconn_t *mc2 = ( metaconn_t * )c2;
112
113 /* For shared sessions, conn is NULL. Only explicitly
114 * bound sessions will have non-NULL conn.
115 */
116 return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
117 }
118
119 /*
120 * meta_back_conndn_dup
121 *
122 * returns -1 in case a duplicate struct metaconn has been inserted;
123 * used by avl stuff
124 */
125 int
meta_back_conndn_dup(void * c1,void * c2)126 meta_back_conndn_dup(
127 void *c1,
128 void *c2 )
129 {
130 metaconn_t *mc1 = ( metaconn_t * )c1;
131 metaconn_t *mc2 = ( metaconn_t * )c2;
132
133 /* Cannot have more than one shared session with same DN */
134 if ( mc1->mc_conn == mc2->mc_conn &&
135 dn_match( &mc1->mc_local_ndn, &mc2->mc_local_ndn ) )
136 {
137 return -1;
138 }
139
140 return 0;
141 }
142
143 /*
144 * Debug stuff (got it from libavl)
145 */
146 #if META_BACK_PRINT_CONNTREE > 0
147 static void
meta_back_print(metaconn_t * mc,char * avlstr)148 meta_back_print( metaconn_t *mc, char *avlstr )
149 {
150 int i;
151
152 fputs( "targets=[", stderr );
153 for ( i = 0; i < mc->mc_info->mi_ntargets; i++ ) {
154 fputc( mc->mc_conns[ i ].msc_ld ? '*' : 'o', stderr);
155 }
156 fputc( ']', stderr );
157
158 fprintf( stderr, " mc=%p local=\"%s\" conn=%p refcnt=%d%s %s\n",
159 (void *)mc,
160 mc->mc_local_ndn.bv_val ? mc->mc_local_ndn.bv_val : "",
161 (void *)mc->mc_conn,
162 mc->mc_refcnt,
163 LDAP_BACK_CONN_TAINTED( mc ) ? " tainted" : "",
164 avlstr );
165 }
166
167 static void
meta_back_ravl_print(TAvlnode * root,int depth)168 meta_back_ravl_print( TAvlnode *root, int depth )
169 {
170 int i;
171
172 if ( root == 0 ) {
173 return;
174 }
175
176 meta_back_ravl_print( root->avl_right, depth + 1 );
177
178 for ( i = 0; i < depth; i++ ) {
179 fprintf( stderr, "-" );
180 }
181 fputc( ' ', stderr );
182
183 meta_back_print( (metaconn_t *)root->avl_data,
184 avl_bf2str( root->avl_bf ) );
185
186 meta_back_ravl_print( root->avl_left, depth + 1 );
187 }
188
189 /* NOTE: duplicate from back-ldap/bind.c */
190 static char* priv2str[] = {
191 "privileged",
192 "privileged/TLS",
193 "anonymous",
194 "anonymous/TLS",
195 "bind",
196 "bind/TLS",
197 NULL
198 };
199
200 void
meta_back_print_conntree(metainfo_t * mi,char * msg)201 meta_back_print_conntree( metainfo_t *mi, char *msg )
202 {
203 int c;
204
205 fprintf( stderr, "========> %s\n", msg );
206
207 for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
208 int i = 0;
209 metaconn_t *mc;
210
211 fprintf( stderr, " %s[%d]\n", priv2str[ c ], mi->mi_conn_priv[ c ].mic_num );
212
213 LDAP_TAILQ_FOREACH( mc, &mi->mi_conn_priv[ c ].mic_priv, mc_q )
214 {
215 fprintf( stderr, " [%d] ", i );
216 meta_back_print( mc, "" );
217 i++;
218 }
219 }
220
221 if ( mi->mi_conninfo.lai_tree == NULL ) {
222 fprintf( stderr, "\t(empty)\n" );
223
224 } else {
225 meta_back_ravl_print( mi->mi_conninfo.lai_tree, 0 );
226 }
227
228 fprintf( stderr, "<======== %s\n", msg );
229 }
230 #endif /* META_BACK_PRINT_CONNTREE */
231 /*
232 * End of debug stuff
233 */
234
235 /*
236 * metaconn_alloc
237 *
238 * Allocates a connection structure, making room for all the referenced targets
239 */
240 static metaconn_t *
metaconn_alloc(Operation * op)241 metaconn_alloc(
242 Operation *op )
243 {
244 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
245 metaconn_t *mc;
246 int ntargets = mi->mi_ntargets;
247
248 assert( ntargets > 0 );
249
250 /* malloc all in one */
251 mc = ( metaconn_t * )ch_calloc( 1, sizeof( metaconn_t )
252 + sizeof( metasingleconn_t ) * ( ntargets - 1 ) );
253 if ( mc == NULL ) {
254 return NULL;
255 }
256
257 mc->mc_info = mi;
258
259 mc->mc_authz_target = META_BOUND_NONE;
260 mc->mc_refcnt = 1;
261
262 return mc;
263 }
264
265 /*
266 * meta_back_init_one_conn
267 *
268 * Initializes one connection
269 */
270 int
meta_back_init_one_conn(Operation * op,SlapReply * rs,metaconn_t * mc,int candidate,int ispriv,ldap_back_send_t sendok,int dolock)271 meta_back_init_one_conn(
272 Operation *op,
273 SlapReply *rs,
274 metaconn_t *mc,
275 int candidate,
276 int ispriv,
277 ldap_back_send_t sendok,
278 int dolock )
279 {
280 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
281 metatarget_t *mt = mi->mi_targets[ candidate ];
282 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
283 int version;
284 dncookie dc;
285 int isauthz = ( candidate == mc->mc_authz_target );
286 int do_return = 0;
287 #ifdef HAVE_TLS
288 int is_ldaps = 0;
289 int do_start_tls = 0;
290 #endif /* HAVE_TLS */
291
292 /* if the server is quarantined, and
293 * - the current interval did not expire yet, or
294 * - no more retries should occur,
295 * don't return the connection */
296 if ( mt->mt_isquarantined ) {
297 slap_retry_info_t *ri = &mt->mt_quarantine;
298 int dont_retry = 0;
299
300 if ( mt->mt_quarantine.ri_interval ) {
301 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
302 dont_retry = ( mt->mt_isquarantined > LDAP_BACK_FQ_NO );
303 if ( dont_retry ) {
304 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
305 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
306 if ( !dont_retry ) {
307 Debug(LDAP_DEBUG_ANY,
308 "%s meta_back_init_one_conn[%d]: quarantine " "retry block #%d try #%d.\n",
309 op->o_log_prefix,
310 candidate, ri->ri_idx,
311 ri->ri_count );
312
313 mt->mt_isquarantined = LDAP_BACK_FQ_RETRYING;
314 }
315
316 }
317 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );
318 }
319
320 if ( dont_retry ) {
321 rs->sr_err = LDAP_UNAVAILABLE;
322 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
323 rs->sr_text = "Target is quarantined";
324 send_ldap_result( op, rs );
325 }
326 return rs->sr_err;
327 }
328 }
329
330 retry_lock:;
331 if ( dolock ) {
332 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
333 }
334
335 /*
336 * Already init'ed
337 */
338 if ( LDAP_BACK_CONN_ISBOUND( msc )
339 || LDAP_BACK_CONN_ISANON( msc ) )
340 {
341 assert( msc->msc_ld != NULL );
342 rs->sr_err = LDAP_SUCCESS;
343 do_return = 1;
344
345 } else if ( META_BACK_CONN_CREATING( msc )
346 || LDAP_BACK_CONN_BINDING( msc ) )
347 {
348 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
349 if ( dolock ) {
350 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
351 }
352
353 ldap_pvt_thread_yield();
354 goto retry_lock;
355 }
356
357 /* sounds more appropriate */
358 rs->sr_err = LDAP_BUSY;
359 rs->sr_text = "No connections to target are available";
360 do_return = 1;
361
362 } else if ( META_BACK_CONN_INITED( msc ) ) {
363 assert( msc->msc_ld != NULL );
364 rs->sr_err = LDAP_SUCCESS;
365 do_return = 1;
366
367 } else {
368 /*
369 * creating...
370 */
371 META_BACK_CONN_CREATING_SET( msc );
372 }
373
374 if ( dolock ) {
375 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
376 }
377
378 if ( do_return ) {
379 if ( rs->sr_err != LDAP_SUCCESS
380 && op->o_conn
381 && ( sendok & LDAP_BACK_SENDERR ) )
382 {
383 send_ldap_result( op, rs );
384 }
385
386 return rs->sr_err;
387 }
388
389 assert( msc->msc_ld == NULL );
390
391 /*
392 * Attempts to initialize the connection to the target ds
393 */
394 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
395 rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
396 #ifdef HAVE_TLS
397 is_ldaps = ldap_is_ldaps_url( mt->mt_uri );
398 #endif /* HAVE_TLS */
399 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
400 if ( rs->sr_err != LDAP_SUCCESS ) {
401 goto error_return;
402 }
403
404 /*
405 * Set LDAP version. This will always succeed: If the client
406 * bound with a particular version, then so can we.
407 */
408 if ( mt->mt_version != 0 ) {
409 version = mt->mt_version;
410
411 } else if ( op->o_conn->c_protocol != 0 ) {
412 version = op->o_conn->c_protocol;
413
414 } else {
415 version = LDAP_VERSION3;
416 }
417 ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &version );
418 ldap_set_urllist_proc( msc->msc_ld, mt->mt_urllist_f, mt->mt_urllist_p );
419
420 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
421 ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS,
422 META_BACK_TGT_CHASE_REFERRALS( mt ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
423
424 slap_client_keepalive(msc->msc_ld, &mt->mt_tls.sb_keepalive);
425
426 if ( mt->mt_tls.sb_tcp_user_timeout > 0 ) {
427 ldap_set_option( msc->msc_ld, LDAP_OPT_TCP_USER_TIMEOUT,
428 &mt->mt_tls.sb_tcp_user_timeout );
429 }
430
431
432
433 #ifdef HAVE_TLS
434 {
435 slap_bindconf *sb = NULL;
436
437 if ( ispriv ) {
438 sb = &mt->mt_idassert.si_bc;
439 } else {
440 sb = &mt->mt_tls;
441 }
442
443 bindconf_tls_set( sb, msc->msc_ld );
444
445 if ( !is_ldaps ) {
446 if ( META_BACK_TGT_USE_TLS( mt )
447 || ( op->o_conn->c_is_tls && META_BACK_TGT_PROPAGATE_TLS( mt ) ) )
448 {
449 do_start_tls = 1;
450 }
451 }
452 }
453
454 /* start TLS ("tls [try-]{start|propagate}" statement) */
455 if ( do_start_tls ) {
456 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
457 /*
458 * use asynchronous StartTLS; in case, chase referral
459 * FIXME: OpenLDAP does not return referral on StartTLS yet
460 */
461 int msgid;
462
463 rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
464 if ( rs->sr_err == LDAP_SUCCESS ) {
465 LDAPMessage *res = NULL;
466 int rc, nretries = mt->mt_nretries;
467 struct timeval tv;
468
469 LDAP_BACK_TV_SET( &tv );
470
471 retry:;
472 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
473 switch ( rc ) {
474 case -1:
475 rs->sr_err = LDAP_UNAVAILABLE;
476 rs->sr_text = "Remote server down";
477 break;
478
479 case 0:
480 if ( nretries != 0 ) {
481 if ( nretries > 0 ) {
482 nretries--;
483 }
484 LDAP_BACK_TV_SET( &tv );
485 goto retry;
486 }
487 rs->sr_err = LDAP_OTHER;
488 rs->sr_text = "Timeout, no more retries";
489 break;
490
491 default:
492 /* only touch when activity actually took place... */
493 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
494 msc->msc_time = op->o_time;
495 }
496 break;
497 }
498
499 if ( rc == LDAP_RES_EXTENDED ) {
500 struct berval *data = NULL;
501
502 /* NOTE: right now, data is unused, so don't get it */
503 rs->sr_err = ldap_parse_extended_result( msc->msc_ld,
504 res, NULL, NULL /* &data */ , 0 );
505 if ( rs->sr_err == LDAP_SUCCESS ) {
506 int err;
507
508 /* FIXME: matched? referrals? response controls? */
509 rs->sr_err = ldap_parse_result( msc->msc_ld,
510 res, &err, NULL, NULL, NULL, NULL, 1 );
511 res = NULL;
512
513 if ( rs->sr_err == LDAP_SUCCESS ) {
514 rs->sr_err = err;
515 }
516 rs->sr_err = slap_map_api2result( rs );
517
518 /* FIXME: in case a referral
519 * is returned, should we try
520 * using it instead of the
521 * configured URI? */
522 if ( rs->sr_err == LDAP_SUCCESS ) {
523 rs->sr_err = ldap_install_tls( msc->msc_ld );
524
525 } else if ( rs->sr_err == LDAP_REFERRAL ) {
526 /* FIXME: LDAP_OPERATIONS_ERROR? */
527 rs->sr_err = LDAP_OTHER;
528 rs->sr_text = "Unwilling to chase referral "
529 "returned by Start TLS exop";
530 }
531
532 if ( data ) {
533 ber_bvfree( data );
534 }
535 }
536
537 } else {
538 rs->sr_err = LDAP_OTHER;
539 rs->sr_text = "Unknown response to StartTLS request :"
540 " an ExtendedResponse is expected";
541 }
542
543 if ( res != NULL ) {
544 ldap_msgfree( res );
545 }
546 }
547 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
548 /*
549 * use synchronous StartTLS
550 */
551 rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
552 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
553
554 /* if StartTLS is requested, only attempt it if the URL
555 * is not "ldaps://"; this may occur not only in case
556 * of misconfiguration, but also when used in the chain
557 * overlay, where the "uri" can be parsed out of a referral */
558 if ( rs->sr_err == LDAP_SERVER_DOWN
559 || ( rs->sr_err != LDAP_SUCCESS
560 && META_BACK_TGT_TLS_CRITICAL( mt ) ) )
561 {
562
563 #ifdef DEBUG_205
564 Debug( LDAP_DEBUG_ANY,
565 "### %s meta_back_init_one_conn(TLS) "
566 "ldap_unbind_ext[%d] ld=%p\n",
567 op->o_log_prefix, candidate,
568 (void *)msc->msc_ld );
569 #endif /* DEBUG_205 */
570
571 /* need to trash a failed Start TLS */
572 meta_clear_one_candidate( op, mc, candidate );
573 goto error_return;
574 }
575 }
576 #endif /* HAVE_TLS */
577
578 /*
579 * Set the network timeout if set
580 */
581 if ( mt->mt_network_timeout != 0 ) {
582 struct timeval network_timeout;
583
584 network_timeout.tv_usec = 0;
585 network_timeout.tv_sec = mt->mt_network_timeout;
586
587 ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
588 (void *)&network_timeout );
589 }
590
591 /*
592 * If the connection DN is not null, an attempt to rewrite it is made
593 */
594
595 if ( ispriv ) {
596 if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) ) {
597 ber_bvreplace( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN );
598 if ( !BER_BVISNULL( &mt->mt_idassert_passwd ) ) {
599 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
600 memset( msc->msc_cred.bv_val, 0,
601 msc->msc_cred.bv_len );
602 }
603 ber_bvreplace( &msc->msc_cred, &mt->mt_idassert_passwd );
604 }
605 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
606
607 } else {
608 ber_bvreplace( &msc->msc_bound_ndn, &slap_empty_bv );
609 }
610
611 } else {
612 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
613 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
614 ber_memfree_x( msc->msc_cred.bv_val, NULL );
615 BER_BVZERO( &msc->msc_cred );
616 }
617 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
618 ber_memfree_x( msc->msc_bound_ndn.bv_val, NULL );
619 BER_BVZERO( &msc->msc_bound_ndn );
620 }
621 if ( !BER_BVISEMPTY( &op->o_ndn )
622 && SLAP_IS_AUTHZ_BACKEND( op )
623 && isauthz )
624 {
625 dc.target = mt;
626 dc.conn = op->o_conn;
627 dc.rs = rs;
628 dc.ctx = "bindDN";
629
630 /*
631 * Rewrite the bind dn if needed
632 */
633 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
634 &msc->msc_bound_ndn ) )
635 {
636
637 #ifdef DEBUG_205
638 Debug( LDAP_DEBUG_ANY,
639 "### %s meta_back_init_one_conn(rewrite) "
640 "ldap_unbind_ext[%d] ld=%p\n",
641 op->o_log_prefix, candidate,
642 (void *)msc->msc_ld );
643 #endif /* DEBUG_205 */
644
645 /* need to trash a connection not fully established */
646 meta_clear_one_candidate( op, mc, candidate );
647 goto error_return;
648 }
649
650 /* copy the DN if needed */
651 if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
652 ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
653 }
654
655 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
656
657 } else {
658 ber_dupbv( &msc->msc_bound_ndn, (struct berval *)&slap_empty_bv );
659 }
660 }
661
662 assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
663
664 error_return:;
665 if ( dolock ) {
666 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
667 }
668 META_BACK_CONN_CREATING_CLEAR( msc );
669 if ( rs->sr_err == LDAP_SUCCESS ) {
670 /*
671 * Sets a cookie for the rewrite session
672 */
673 ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
674 META_BACK_CONN_INITED_SET( msc );
675 }
676 if ( dolock ) {
677 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
678 }
679
680 if ( rs->sr_err != LDAP_SUCCESS ) {
681 /* Get the error message and print it in TRACE mode */
682 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
683 Log( LDAP_DEBUG_TRACE, ldap_syslog_level, "%s: meta_back_init_one_conn[%d] failed err=%d text=%s\n",
684 op->o_log_prefix, candidate, rs->sr_err, rs->sr_text );
685 }
686
687 rs->sr_err = slap_map_api2result( rs );
688 if ( sendok & LDAP_BACK_SENDERR ) {
689 send_ldap_result( op, rs );
690 }
691 }
692
693 return rs->sr_err;
694 }
695
696 /*
697 * meta_back_retry
698 *
699 * Retries one connection
700 */
701 int
meta_back_retry(Operation * op,SlapReply * rs,metaconn_t ** mcp,int candidate,ldap_back_send_t sendok)702 meta_back_retry(
703 Operation *op,
704 SlapReply *rs,
705 metaconn_t **mcp,
706 int candidate,
707 ldap_back_send_t sendok )
708 {
709 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
710 metatarget_t *mt = mi->mi_targets[ candidate ];
711 metaconn_t *mc = *mcp;
712 metasingleconn_t *msc = &mc->mc_conns[ candidate ];
713 int rc = LDAP_UNAVAILABLE,
714 binding,
715 quarantine = 1;
716
717 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
718
719 assert( !META_BACK_CONN_CREATING( msc ) );
720 binding = LDAP_BACK_CONN_BINDING( msc );
721 LDAP_BACK_CONN_BINDING_CLEAR( msc );
722
723 assert( mc->mc_refcnt > 0 );
724 if ( mc->mc_refcnt == 1 ) {
725 struct berval save_cred;
726
727 if ( LogTest( LDAP_DEBUG_ANY ) ) {
728 /* this lock is required; however,
729 * it's invoked only when logging is on */
730 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
731 Debug(LDAP_DEBUG_ANY,
732 "%s meta_back_retry[%d]: retrying URI=\"%s\" DN=\"%s\".\n",
733 op->o_log_prefix, candidate, mt->mt_uri,
734 BER_BVISNULL(&msc->msc_bound_ndn) ? "" : msc->msc_bound_ndn.bv_val );
735 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
736 }
737
738 /* save credentials, if any, for later use;
739 * meta_clear_one_candidate() would free them */
740 save_cred = msc->msc_cred;
741 BER_BVZERO( &msc->msc_cred );
742
743 meta_clear_one_candidate( op, mc, candidate );
744 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
745
746 ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
747
748 /* mc here must be the regular mc, reset and ready for init */
749 rc = meta_back_init_one_conn( op, rs, mc, candidate,
750 LDAP_BACK_CONN_ISPRIV( mc ), sendok, 0 );
751
752 /* restore credentials, if any and if needed;
753 * meta_back_init_one_conn() restores msc_bound_ndn, if any;
754 * if no msc_bound_ndn is restored, destroy credentials */
755 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
756 && BER_BVISNULL( &msc->msc_cred ) )
757 {
758 msc->msc_cred = save_cred;
759
760 } else if ( !BER_BVISNULL( &save_cred ) ) {
761 memset( save_cred.bv_val, 0, save_cred.bv_len );
762 ber_memfree_x( save_cred.bv_val, NULL );
763 }
764
765 /* restore the "binding" flag, in case */
766 if ( binding ) {
767 LDAP_BACK_CONN_BINDING_SET( msc );
768 }
769
770 if ( rc == LDAP_SUCCESS ) {
771 quarantine = 0;
772 LDAP_BACK_CONN_BINDING_SET( msc ); binding = 1;
773 rc = meta_back_single_dobind( op, rs, mcp, candidate,
774 sendok, mt->mt_nretries, 0 );
775
776 Debug( LDAP_DEBUG_ANY,
777 "%s meta_back_retry[%d]: "
778 "meta_back_single_dobind=%d\n",
779 op->o_log_prefix, candidate, rc );
780 if ( rc == LDAP_SUCCESS ) {
781 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) &&
782 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
783 {
784 LDAP_BACK_CONN_ISBOUND_SET( msc );
785
786 } else {
787 LDAP_BACK_CONN_ISANON_SET( msc );
788 }
789
790 /* when bound, dispose of the "binding" flag */
791 if ( binding ) {
792 LDAP_BACK_CONN_BINDING_CLEAR( msc );
793 }
794 }
795 }
796
797 #if 0 /* ITS#7591, following stmt drops needed result msgs */
798 /* don't send twice */
799 sendok &= ~LDAP_BACK_SENDERR;
800 #endif
801 }
802
803 if ( rc != LDAP_SUCCESS ) {
804 SlapReply *candidates = meta_back_candidates_get( op );
805
806 candidates[ candidate ].sr_err = rc;
807
808 if ( *mcp != NULL ) {
809 if ( mc->mc_refcnt == 1 ) {
810 if ( binding ) {
811 LDAP_BACK_CONN_BINDING_CLEAR( msc );
812 }
813 (void)meta_clear_one_candidate( op, mc, candidate );
814 }
815
816 LDAP_BACK_CONN_TAINTED_SET( mc );
817 /* only release if mandatory; otherwise
818 * let the caller do what's best before
819 * releasing */
820 if ( META_BACK_ONERR_STOP( mi ) ) {
821 meta_back_release_conn_lock( mi, mc, 0 );
822 *mcp = NULL;
823
824 } else {
825 #if META_BACK_PRINT_CONNTREE > 0
826 meta_back_print_conntree( mi, ">>> meta_back_retry" );
827 #endif /* META_BACK_PRINT_CONNTREE */
828
829 /* FIXME: could be done better, reworking meta_back_release_conn_lock() */
830 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
831 if ( mc->mc_q.tqe_prev != NULL ) {
832 assert( LDAP_BACK_CONN_CACHED( mc ) );
833 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
834 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
835 mc, mc_q );
836 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
837 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
838
839 } else {
840 assert( !LDAP_BACK_CONN_CACHED( mc ) );
841 }
842
843 } else {
844 /* FIXME: check if in tree, for consistency? */
845 (void)ldap_tavl_delete( &mi->mi_conninfo.lai_tree,
846 ( caddr_t )mc, meta_back_conndnmc_cmp );
847 }
848 LDAP_BACK_CONN_CACHED_CLEAR( mc );
849
850 #if META_BACK_PRINT_CONNTREE > 0
851 meta_back_print_conntree( mi, "<<< meta_back_retry" );
852 #endif /* META_BACK_PRINT_CONNTREE */
853 }
854 }
855
856 if ( sendok & LDAP_BACK_SENDERR ) {
857 rs->sr_err = rc;
858 rs->sr_text = "Unable to retry";
859 send_ldap_result( op, rs );
860 }
861 }
862
863 if ( quarantine && META_BACK_TGT_QUARANTINE( mt ) ) {
864 meta_back_quarantine( op, rs, candidate );
865 }
866
867 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
868
869 return rc == LDAP_SUCCESS ? 1 : 0;
870 }
871
872 /*
873 * callback for unique candidate selection
874 */
875 static int
meta_back_conn_cb(Operation * op,SlapReply * rs)876 meta_back_conn_cb( Operation *op, SlapReply *rs )
877 {
878 assert( op->o_tag == LDAP_REQ_SEARCH );
879
880 switch ( rs->sr_type ) {
881 case REP_SEARCH:
882 ((long *)op->o_callback->sc_private)[0] = (long)op->o_private;
883 break;
884
885 case REP_SEARCHREF:
886 case REP_RESULT:
887 break;
888
889 default:
890 return rs->sr_err;
891 }
892
893 return 0;
894 }
895
896
897 static int
meta_back_get_candidate(Operation * op,SlapReply * rs,struct berval * ndn)898 meta_back_get_candidate(
899 Operation *op,
900 SlapReply *rs,
901 struct berval *ndn )
902 {
903 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
904 long candidate;
905
906 /*
907 * tries to get a unique candidate
908 * (takes care of default target)
909 */
910 candidate = meta_back_select_unique_candidate( mi, ndn );
911
912 /*
913 * if any is found, inits the connection
914 */
915 if ( candidate == META_TARGET_NONE ) {
916 rs->sr_err = LDAP_NO_SUCH_OBJECT;
917 rs->sr_text = "No suitable candidate target found";
918
919 } else if ( candidate == META_TARGET_MULTIPLE ) {
920 Operation op2 = *op;
921 SlapReply rs2 = { REP_RESULT };
922 slap_callback cb2 = { 0 };
923 int rc;
924
925 /* try to get a unique match for the request ndn
926 * among the multiple candidates available */
927 op2.o_tag = LDAP_REQ_SEARCH;
928 op2.o_req_dn = *ndn;
929 op2.o_req_ndn = *ndn;
930 op2.ors_scope = LDAP_SCOPE_BASE;
931 op2.ors_deref = LDAP_DEREF_NEVER;
932 op2.ors_attrs = slap_anlist_no_attrs;
933 op2.ors_attrsonly = 0;
934 op2.ors_limit = NULL;
935 op2.ors_slimit = 1;
936 op2.ors_tlimit = SLAP_NO_LIMIT;
937
938 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
939 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
940
941 op2.o_callback = &cb2;
942 cb2.sc_response = meta_back_conn_cb;
943 cb2.sc_private = (void *)&candidate;
944
945 rc = op->o_bd->be_search( &op2, &rs2 );
946
947 switch ( rs2.sr_err ) {
948 case LDAP_SUCCESS:
949 default:
950 rs->sr_err = rs2.sr_err;
951 break;
952
953 case LDAP_SIZELIMIT_EXCEEDED:
954 /* if multiple candidates can serve the operation,
955 * and a default target is defined, and it is
956 * a candidate, try using it (FIXME: YMMV) */
957 if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
958 && meta_back_is_candidate( mi->mi_targets[ mi->mi_defaulttarget ],
959 ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
960 {
961 candidate = mi->mi_defaulttarget;
962 rs->sr_err = LDAP_SUCCESS;
963 rs->sr_text = NULL;
964
965 } else {
966 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
967 rs->sr_text = "Unable to select unique candidate target";
968 }
969 break;
970 }
971
972 } else {
973 rs->sr_err = LDAP_SUCCESS;
974 }
975
976 return candidate;
977 }
978
979 static void *meta_back_candidates_dummy;
980
981 static void
meta_back_candidates_keyfree(void * key,void * data)982 meta_back_candidates_keyfree(
983 void *key,
984 void *data )
985 {
986 metacandidates_t *mc = (metacandidates_t *)data;
987
988 ber_memfree_x( mc->mc_candidates, NULL );
989 ber_memfree_x( data, NULL );
990 }
991
992 SlapReply *
meta_back_candidates_get(Operation * op)993 meta_back_candidates_get( Operation *op )
994 {
995 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
996 metacandidates_t *mc;
997
998 if ( op->o_threadctx ) {
999 void *data = NULL;
1000
1001 ldap_pvt_thread_pool_getkey( op->o_threadctx,
1002 &meta_back_candidates_dummy, &data, NULL );
1003 mc = (metacandidates_t *)data;
1004
1005 } else {
1006 mc = mi->mi_candidates;
1007 }
1008
1009 if ( mc == NULL ) {
1010 mc = ch_calloc( sizeof( metacandidates_t ), 1 );
1011 mc->mc_ntargets = mi->mi_ntargets;
1012 mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
1013 if ( op->o_threadctx ) {
1014 void *data = NULL;
1015
1016 data = (void *)mc;
1017 ldap_pvt_thread_pool_setkey( op->o_threadctx,
1018 &meta_back_candidates_dummy, data,
1019 meta_back_candidates_keyfree,
1020 NULL, NULL );
1021
1022 } else {
1023 mi->mi_candidates = mc;
1024 }
1025
1026 } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
1027 /* NOTE: in the future, may want to allow back-config
1028 * to add/remove targets from back-meta... */
1029 mc->mc_candidates = ch_realloc( mc->mc_candidates,
1030 sizeof( SlapReply ) * mi->mi_ntargets );
1031 memset( &mc->mc_candidates[ mc->mc_ntargets ], 0,
1032 sizeof( SlapReply ) * ( mi->mi_ntargets - mc->mc_ntargets ) );
1033 mc->mc_ntargets = mi->mi_ntargets;
1034 }
1035
1036 return mc->mc_candidates;
1037 }
1038
1039 /*
1040 * meta_back_getconn
1041 *
1042 * Prepares the connection structure
1043 *
1044 * RATIONALE:
1045 *
1046 * - determine what DN is being requested:
1047 *
1048 * op requires candidate checks
1049 *
1050 * add unique parent of o_req_ndn
1051 * bind unique^*[/all] o_req_ndn [no check]
1052 * compare unique^+ o_req_ndn
1053 * delete unique o_req_ndn
1054 * modify unique o_req_ndn
1055 * search any o_req_ndn
1056 * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
1057 *
1058 * - for ops that require the candidate to be unique, in case of multiple
1059 * occurrences an internal search with sizeLimit=1 is performed
1060 * if a unique candidate can actually be determined. If none is found,
1061 * the operation aborts; if multiple are found, the default target
1062 * is used if defined and candidate; otherwise the operation aborts.
1063 *
1064 * *^note: actually, the bind operation is handled much like a search;
1065 * i.e. the bind is broadcast to all candidate targets.
1066 *
1067 * +^note: actually, the compare operation is handled much like a search;
1068 * i.e. the compare is broadcast to all candidate targets, while checking
1069 * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
1070 * returned.
1071 */
1072 metaconn_t *
meta_back_getconn(Operation * op,SlapReply * rs,int * candidate,ldap_back_send_t sendok)1073 meta_back_getconn(
1074 Operation *op,
1075 SlapReply *rs,
1076 int *candidate,
1077 ldap_back_send_t sendok )
1078 {
1079 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
1080 metaconn_t *mc = NULL,
1081 mc_curr = {{ 0 }};
1082 int cached = META_TARGET_NONE,
1083 i = META_TARGET_NONE,
1084 err = LDAP_SUCCESS,
1085 new_conn = 0,
1086 ncandidates = 0;
1087
1088
1089 meta_op_type op_type = META_OP_REQUIRE_SINGLE;
1090 enum {
1091 META_DNTYPE_ENTRY,
1092 META_DNTYPE_PARENT,
1093 META_DNTYPE_NEWPARENT
1094 } dn_type = META_DNTYPE_ENTRY;
1095 struct berval ndn = op->o_req_ndn,
1096 pndn;
1097
1098 SlapReply *candidates = meta_back_candidates_get( op );
1099
1100 /* Internal searches are privileged and shared. So is root. */
1101 if ( ( !BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ALWAYS( mi ) )
1102 || ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_ANON( mi ) )
1103 || op->o_do_not_cache || be_isroot( op ) )
1104 {
1105 LDAP_BACK_CONN_ISPRIV_SET( &mc_curr );
1106 mc_curr.mc_local_ndn = op->o_bd->be_rootndn;
1107 LDAP_BACK_PCONN_ROOTDN_SET( &mc_curr, op );
1108
1109 } else if ( BER_BVISEMPTY( &op->o_ndn ) && META_BACK_PROXYAUTHZ_NOANON( mi ) )
1110 {
1111 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1112 BER_BVSTR( &mc_curr.mc_local_ndn, "" );
1113 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1114
1115 } else {
1116 mc_curr.mc_local_ndn = op->o_ndn;
1117
1118 /* Explicit binds must not be shared */
1119 if ( !BER_BVISEMPTY( &op->o_ndn )
1120 || op->o_tag == LDAP_REQ_BIND
1121 || SLAP_IS_AUTHZ_BACKEND( op ) )
1122 {
1123 mc_curr.mc_conn = op->o_conn;
1124
1125 } else {
1126 LDAP_BACK_CONN_ISANON_SET( &mc_curr );
1127 LDAP_BACK_PCONN_ANON_SET( &mc_curr, op );
1128 }
1129 }
1130
1131 /* Explicit Bind requests always get their own conn */
1132 if ( sendok & LDAP_BACK_BINDING ) {
1133 mc_curr.mc_conn = op->o_conn;
1134
1135 } else {
1136 /* Searches for a metaconn in the avl tree */
1137 retry_lock:;
1138 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1139 if ( LDAP_BACK_PCONN_ISPRIV( &mc_curr ) ) {
1140 /* lookup a conn that's not binding */
1141 LDAP_TAILQ_FOREACH( mc,
1142 &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv,
1143 mc_q )
1144 {
1145 if ( !LDAP_BACK_CONN_BINDING( mc ) && mc->mc_refcnt == 0 ) {
1146 break;
1147 }
1148 }
1149
1150 if ( mc != NULL ) {
1151 /* move to tail of queue */
1152 if ( mc != LDAP_TAILQ_LAST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1153 mc_conn_priv_q ) )
1154 {
1155 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1156 mc, mc_q );
1157 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1158 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1159 mc, mc_q );
1160 }
1161
1162 } else if ( !LDAP_BACK_USE_TEMPORARIES( mi )
1163 && mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_num == mi->mi_conn_priv_max )
1164 {
1165 mc = LDAP_TAILQ_FIRST( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( &mc_curr ) ].mic_priv );
1166 }
1167
1168
1169 } else {
1170 mc = (metaconn_t *)ldap_tavl_find( mi->mi_conninfo.lai_tree,
1171 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1172 }
1173
1174 if ( mc ) {
1175 /* catch taint errors */
1176 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1177
1178 /* Don't reuse connections while they're still binding
1179 * NOTE: only makes sense for binds */
1180 if ( LDAP_BACK_CONN_BINDING( mc ) ) {
1181 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1182 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1183
1184 ldap_pvt_thread_yield();
1185 goto retry_lock;
1186 }
1187
1188 /* release conn, and create a temporary */
1189 mc = NULL;
1190
1191 } else {
1192 if ( mc->mc_refcnt == 0 && (( mi->mi_conn_ttl != 0 && op->o_time > mc->mc_create_time + mi->mi_conn_ttl )
1193 || ( mi->mi_idle_timeout != 0 && op->o_time > mc->mc_time + mi->mi_idle_timeout )) )
1194 {
1195 #if META_BACK_PRINT_CONNTREE > 0
1196 meta_back_print_conntree( mi,
1197 ">>> meta_back_getconn(expired)" );
1198 #endif /* META_BACK_PRINT_CONNTREE */
1199
1200 /* don't let anyone else use this expired connection */
1201 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1202 if ( mc->mc_q.tqe_prev != NULL ) {
1203 assert( LDAP_BACK_CONN_CACHED( mc ) );
1204 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1205 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv,
1206 mc, mc_q );
1207 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1208 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1209
1210 } else {
1211 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1212 }
1213
1214 } else {
1215 (void)ldap_tavl_delete( &mi->mi_conninfo.lai_tree,
1216 (caddr_t)mc, meta_back_conndnmc_cmp );
1217 }
1218
1219 #if META_BACK_PRINT_CONNTREE > 0
1220 meta_back_print_conntree( mi,
1221 "<<< meta_back_getconn(expired)" );
1222 #endif /* META_BACK_PRINT_CONNTREE */
1223 LDAP_BACK_CONN_TAINTED_SET( mc );
1224 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1225
1226 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1227 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1228 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1229
1230 Debug( LDAP_DEBUG_TRACE,
1231 "%s meta_back_getconn: mc=%p conn=%s expired (tainted).\n",
1232 op->o_log_prefix, (void *)mc, buf );
1233 }
1234 }
1235
1236 mc->mc_refcnt++;
1237 }
1238 }
1239 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1240 }
1241
1242 switch ( op->o_tag ) {
1243 case LDAP_REQ_ADD:
1244 /* if we go to selection, the entry must not exist,
1245 * and we must be able to resolve the parent */
1246 dn_type = META_DNTYPE_PARENT;
1247 dnParent( &ndn, &pndn );
1248 break;
1249
1250 case LDAP_REQ_MODRDN:
1251 /* if nnewSuperior is not NULL, it must resolve
1252 * to the same candidate as the req_ndn */
1253 if ( op->orr_nnewSup ) {
1254 dn_type = META_DNTYPE_NEWPARENT;
1255 }
1256 break;
1257
1258 case LDAP_REQ_BIND:
1259 /* if bound as rootdn, the backend must bind to all targets
1260 * with the administrative identity
1261 * (unless pseoudoroot-bind-defer is TRUE) */
1262 if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
1263 op_type = META_OP_REQUIRE_ALL;
1264 }
1265 break;
1266
1267 case LDAP_REQ_COMPARE:
1268 case LDAP_REQ_DELETE:
1269 case LDAP_REQ_MODIFY:
1270 /* just a unique candidate */
1271 break;
1272
1273 case LDAP_REQ_SEARCH:
1274 /* allow multiple candidates for the searchBase */
1275 op_type = META_OP_ALLOW_MULTIPLE;
1276 break;
1277
1278 default:
1279 /* right now, just break (exop?) */
1280 break;
1281 }
1282
1283 /*
1284 * require all connections ...
1285 */
1286 if ( op_type == META_OP_REQUIRE_ALL ) {
1287
1288 /* Looks like we didn't get a bind. Open a new session... */
1289 if ( mc == NULL ) {
1290 assert( new_conn == 0 );
1291 mc = metaconn_alloc( op );
1292 mc->mc_conn = mc_curr.mc_conn;
1293 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1294 new_conn = 1;
1295 if ( sendok & LDAP_BACK_BINDING ) {
1296 LDAP_BACK_CONN_BINDING_SET( mc );
1297 }
1298 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1299 LDAP_BACK_CONN_ISPRIV_SET( mc );
1300
1301 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1302 LDAP_BACK_CONN_ISANON_SET( mc );
1303 }
1304
1305 } else if ( 0 ) {
1306 /* TODO: if any of the connections is binding,
1307 * release mc and create a new one */
1308 }
1309
1310 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1311 /*
1312 * The target is activated; if needed, it is
1313 * also init'd
1314 */
1315 candidates[ i ].sr_err = meta_back_init_one_conn( op,
1316 rs, mc, i, LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1317 LDAP_BACK_DONTSEND, !new_conn );
1318 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1319 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1320 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1321 }
1322 META_CANDIDATE_SET( &candidates[ i ] );
1323 ncandidates++;
1324
1325 } else {
1326
1327 /*
1328 * FIXME: in case one target cannot
1329 * be init'd, should the other ones
1330 * be tried?
1331 */
1332 META_CANDIDATE_RESET( &candidates[ i ] );
1333 err = candidates[ i ].sr_err;
1334 continue;
1335 }
1336 }
1337
1338 if ( ncandidates == 0 ) {
1339 if ( new_conn ) {
1340 mc->mc_refcnt = 0;
1341 meta_back_conn_free( mc );
1342
1343 } else {
1344 meta_back_release_conn( mi, mc );
1345 }
1346
1347 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1348 rs->sr_text = "Unable to select valid candidates";
1349
1350 if ( sendok & LDAP_BACK_SENDERR ) {
1351 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1352 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1353 }
1354 send_ldap_result( op, rs );
1355 rs->sr_matched = NULL;
1356 }
1357
1358 return NULL;
1359 }
1360
1361 goto done;
1362 }
1363
1364 /*
1365 * looks in cache, if any
1366 */
1367 if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1368 cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
1369 }
1370
1371 if ( op_type == META_OP_REQUIRE_SINGLE ) {
1372 metatarget_t *mt = NULL;
1373 metasingleconn_t *msc = NULL;
1374
1375 int j;
1376
1377 for ( j = 0; j < mi->mi_ntargets; j++ ) {
1378 META_CANDIDATE_RESET( &candidates[ j ] );
1379 }
1380
1381 /*
1382 * tries to get a unique candidate
1383 * (takes care of default target)
1384 */
1385 if ( i == META_TARGET_NONE ) {
1386 i = meta_back_get_candidate( op, rs, &ndn );
1387
1388 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && dn_type == META_DNTYPE_PARENT ) {
1389 i = meta_back_get_candidate( op, rs, &pndn );
1390 }
1391
1392 if ( i < 0 || rs->sr_err != LDAP_SUCCESS ) {
1393 if ( mc != NULL ) {
1394 meta_back_release_conn( mi, mc );
1395 }
1396
1397 if ( sendok & LDAP_BACK_SENDERR ) {
1398 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1399 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1400 }
1401 send_ldap_result( op, rs );
1402 rs->sr_matched = NULL;
1403 }
1404
1405 return NULL;
1406 }
1407 }
1408
1409 if ( dn_type == META_DNTYPE_NEWPARENT && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
1410 {
1411 if ( mc != NULL ) {
1412 meta_back_release_conn( mi, mc );
1413 }
1414
1415 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1416 rs->sr_text = "Cross-target rename not supported";
1417 if ( sendok & LDAP_BACK_SENDERR ) {
1418 send_ldap_result( op, rs );
1419 }
1420
1421 return NULL;
1422 }
1423
1424 Debug( LDAP_DEBUG_TRACE,
1425 "==>meta_back_getconn: got target=%d for ndn=\"%s\" from cache\n",
1426 i, op->o_req_ndn.bv_val );
1427
1428 if ( mc == NULL ) {
1429 /* Retries searching for a metaconn in the avl tree
1430 * the reason is that the connection might have been
1431 * created by meta_back_get_candidate() */
1432 if ( !( sendok & LDAP_BACK_BINDING ) ) {
1433 retry_lock2:;
1434 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1435 mc = (metaconn_t *)ldap_tavl_find( mi->mi_conninfo.lai_tree,
1436 (caddr_t)&mc_curr, meta_back_conndn_cmp );
1437 if ( mc != NULL ) {
1438 /* catch taint errors */
1439 assert( !LDAP_BACK_CONN_TAINTED( mc ) );
1440
1441 /* Don't reuse connections while they're still binding */
1442 if ( META_BACK_CONN_CREATING( &mc->mc_conns[ i ] )
1443 || LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) )
1444 {
1445 if ( !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1446 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1447 ldap_pvt_thread_yield();
1448 goto retry_lock2;
1449 }
1450
1451 mc = NULL;
1452
1453 } else {
1454 mc->mc_refcnt++;
1455 }
1456 }
1457 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1458 }
1459
1460 /* Looks like we didn't get a bind. Open a new session... */
1461 if ( mc == NULL ) {
1462 assert( new_conn == 0 );
1463 mc = metaconn_alloc( op );
1464 mc->mc_conn = mc_curr.mc_conn;
1465 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1466 new_conn = 1;
1467 if ( sendok & LDAP_BACK_BINDING ) {
1468 LDAP_BACK_CONN_BINDING_SET( mc );
1469 }
1470 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1471 LDAP_BACK_CONN_ISPRIV_SET( mc );
1472
1473 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1474 LDAP_BACK_CONN_ISANON_SET( mc );
1475 }
1476 }
1477 }
1478
1479 /*
1480 * Clear all other candidates
1481 */
1482 ( void )meta_clear_unused_candidates( op, i );
1483
1484 mt = mi->mi_targets[ i ];
1485 msc = &mc->mc_conns[ i ];
1486
1487 /*
1488 * The target is activated; if needed, it is
1489 * also init'd. In case of error, meta_back_init_one_conn
1490 * sends the appropriate result.
1491 */
1492 err = meta_back_init_one_conn( op, rs, mc, i,
1493 LDAP_BACK_CONN_ISPRIV( &mc_curr ), sendok, !new_conn );
1494 if ( err != LDAP_SUCCESS ) {
1495 /*
1496 * FIXME: in case one target cannot
1497 * be init'd, should the other ones
1498 * be tried?
1499 */
1500 META_CANDIDATE_RESET( &candidates[ i ] );
1501 if ( new_conn ) {
1502 mc->mc_refcnt = 0;
1503 meta_back_conn_free( mc );
1504
1505 } else {
1506 meta_back_release_conn( mi, mc );
1507 }
1508 return NULL;
1509 }
1510
1511 if ( new_conn && ( sendok & LDAP_BACK_BINDING ) ) {
1512 LDAP_BACK_CONN_BINDING_SET( &mc->mc_conns[ i ] );
1513 }
1514
1515 candidates[ i ].sr_err = LDAP_SUCCESS;
1516 META_CANDIDATE_SET( &candidates[ i ] );
1517 ncandidates++;
1518
1519 if ( candidate ) {
1520 *candidate = i;
1521 }
1522
1523 /*
1524 * if no unique candidate ...
1525 */
1526 } else {
1527
1528 /* Looks like we didn't get a bind. Open a new session... */
1529 if ( mc == NULL ) {
1530 assert( new_conn == 0 );
1531 mc = metaconn_alloc( op );
1532 mc->mc_conn = mc_curr.mc_conn;
1533 ber_dupbv( &mc->mc_local_ndn, &mc_curr.mc_local_ndn );
1534 new_conn = 1;
1535 if ( LDAP_BACK_CONN_ISPRIV( &mc_curr ) ) {
1536 LDAP_BACK_CONN_ISPRIV_SET( mc );
1537
1538 } else if ( LDAP_BACK_CONN_ISANON( &mc_curr ) ) {
1539 LDAP_BACK_CONN_ISANON_SET( mc );
1540 }
1541 }
1542
1543 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1544 metatarget_t *mt = mi->mi_targets[ i ];
1545
1546 META_CANDIDATE_RESET( &candidates[ i ] );
1547
1548 if ( i == cached
1549 || meta_back_is_candidate( mt, &op->o_req_ndn,
1550 op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_SUBTREE ) )
1551 {
1552
1553 /*
1554 * The target is activated; if needed, it is
1555 * also init'd
1556 */
1557 int lerr = meta_back_init_one_conn( op, rs, mc, i,
1558 LDAP_BACK_CONN_ISPRIV( &mc_curr ),
1559 LDAP_BACK_DONTSEND, !new_conn );
1560 candidates[ i ].sr_err = lerr;
1561 if ( lerr == LDAP_SUCCESS ) {
1562 META_CANDIDATE_SET( &candidates[ i ] );
1563 ncandidates++;
1564
1565 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d]\n",
1566 op->o_log_prefix, i );
1567
1568 } else if ( lerr == LDAP_UNAVAILABLE && !META_BACK_ONERR_STOP( mi ) ) {
1569 META_CANDIDATE_SET( &candidates[ i ] );
1570
1571 Debug( LDAP_DEBUG_TRACE, "%s: meta_back_getconn[%d] %s\n",
1572 op->o_log_prefix, i,
1573 mt->mt_isquarantined != LDAP_BACK_FQ_NO ? "quarantined" : "unavailable" );
1574
1575 } else {
1576
1577 /*
1578 * FIXME: in case one target cannot
1579 * be init'd, should the other ones
1580 * be tried?
1581 */
1582 if ( new_conn ) {
1583 ( void )meta_clear_one_candidate( op, mc, i );
1584 }
1585 /* leave the target candidate, but record the error for later use */
1586 err = lerr;
1587
1588 if ( lerr == LDAP_UNAVAILABLE && mt->mt_isquarantined != LDAP_BACK_FQ_NO ) {
1589 Log( LDAP_DEBUG_TRACE, ldap_syslog_level, "%s: meta_back_getconn[%d] quarantined err=%d text=%s\n",
1590 op->o_log_prefix, i, lerr, rs->sr_text );
1591
1592 } else {
1593 Log( LDAP_DEBUG_ANY, ldap_syslog, "%s: meta_back_getconn[%d] failed err=%d text=%s\n",
1594 op->o_log_prefix, i, lerr, rs->sr_text );
1595 }
1596
1597 if ( META_BACK_ONERR_STOP( mi ) ) {
1598 if ( sendok & LDAP_BACK_SENDERR ) {
1599 send_ldap_result( op, rs );
1600 }
1601 if ( new_conn ) {
1602 mc->mc_refcnt = 0;
1603 meta_back_conn_free( mc );
1604
1605 } else {
1606 meta_back_release_conn( mi, mc );
1607 }
1608
1609 return NULL;
1610 }
1611
1612 continue;
1613 }
1614
1615 } else {
1616 if ( new_conn ) {
1617 ( void )meta_clear_one_candidate( op, mc, i );
1618 }
1619 }
1620 }
1621
1622 if ( ncandidates == 0 ) {
1623 if ( new_conn ) {
1624 mc->mc_refcnt = 0;
1625 meta_back_conn_free( mc );
1626
1627 } else {
1628 meta_back_release_conn( mi, mc );
1629 }
1630
1631 if ( rs->sr_err == LDAP_SUCCESS ) {
1632 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1633 rs->sr_text = "Unable to select valid candidates";
1634 }
1635
1636 if ( sendok & LDAP_BACK_SENDERR ) {
1637 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
1638 rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
1639 }
1640 send_ldap_result( op, rs );
1641 rs->sr_matched = NULL;
1642 }
1643
1644 return NULL;
1645 }
1646 }
1647
1648 done:;
1649 /* clear out meta_back_init_one_conn non-fatal errors */
1650 rs->sr_err = LDAP_SUCCESS;
1651 rs->sr_text = NULL;
1652
1653 /* touch the timestamp */
1654 if ( mi->mi_idle_timeout != 0 ) {
1655 mc->mc_time = op->o_time;
1656 }
1657
1658 if ( new_conn ) {
1659 if ( mi->mi_conn_ttl ) {
1660 mc->mc_create_time = op->o_time;
1661 }
1662
1663 /*
1664 * Inserts the newly created metaconn in the avl tree
1665 */
1666 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1667 #if META_BACK_PRINT_CONNTREE > 0
1668 meta_back_print_conntree( mi, ">>> meta_back_getconn" );
1669 #endif /* META_BACK_PRINT_CONNTREE */
1670
1671 err = 0;
1672 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1673 if ( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num < mi->mi_conn_priv_max ) {
1674 LDAP_TAILQ_INSERT_TAIL( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1675 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num++;
1676 LDAP_BACK_CONN_CACHED_SET( mc );
1677
1678 } else {
1679 LDAP_BACK_CONN_TAINTED_SET( mc );
1680 }
1681 rs->sr_err = 0;
1682
1683 } else if ( !( sendok & LDAP_BACK_BINDING ) ) {
1684 err = ldap_tavl_insert( &mi->mi_conninfo.lai_tree, ( caddr_t )mc,
1685 meta_back_conndn_cmp, meta_back_conndn_dup );
1686 LDAP_BACK_CONN_CACHED_SET( mc );
1687 }
1688
1689 #if META_BACK_PRINT_CONNTREE > 0
1690 meta_back_print_conntree( mi, "<<< meta_back_getconn" );
1691 #endif /* META_BACK_PRINT_CONNTREE */
1692 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1693
1694 if ( !LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1695 /*
1696 * Err could be -1 in case a duplicate metaconn is inserted
1697 */
1698 switch ( err ) {
1699 case 0:
1700 break;
1701
1702 case -1:
1703 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1704 /* duplicate: free and try to get the newly created one */
1705 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( mi ) ) {
1706 mc->mc_refcnt = 0;
1707 meta_back_conn_free( mc );
1708
1709 new_conn = 0;
1710 goto retry_lock;
1711 }
1712
1713 LDAP_BACK_CONN_TAINTED_SET( mc );
1714 break;
1715
1716 default:
1717 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1718 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1719 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1720 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1721
1722 Debug( LDAP_DEBUG_ANY,
1723 "%s meta_back_getconn: candidates=%d conn=%s insert failed\n",
1724 op->o_log_prefix, ncandidates, buf );
1725 }
1726
1727 mc->mc_refcnt = 0;
1728 meta_back_conn_free( mc );
1729
1730 rs->sr_err = LDAP_OTHER;
1731 rs->sr_text = "Proxy bind collision";
1732 if ( sendok & LDAP_BACK_SENDERR ) {
1733 send_ldap_result( op, rs );
1734 }
1735 return NULL;
1736 }
1737 }
1738
1739 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1740 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1741 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1742
1743 Debug( LDAP_DEBUG_TRACE,
1744 "%s meta_back_getconn: candidates=%d conn=%s inserted\n",
1745 op->o_log_prefix, ncandidates, buf );
1746 }
1747
1748 } else {
1749 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1750 char buf[STRLENOF("4294967295U") + 1] = { 0 };
1751 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
1752
1753 Debug( LDAP_DEBUG_TRACE,
1754 "%s meta_back_getconn: candidates=%d conn=%s fetched\n",
1755 op->o_log_prefix, ncandidates, buf );
1756 }
1757 }
1758
1759 return mc;
1760 }
1761
1762 void
meta_back_release_conn_lock(metainfo_t * mi,metaconn_t * mc,int dolock)1763 meta_back_release_conn_lock(
1764 metainfo_t *mi,
1765 metaconn_t *mc,
1766 int dolock )
1767 {
1768 assert( mc != NULL );
1769
1770 if ( dolock ) {
1771 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1772 }
1773 assert( mc->mc_refcnt > 0 );
1774 mc->mc_refcnt--;
1775 /* NOTE: the connection is removed if either it is tainted
1776 * or if it is shared and no one else is using it. This needs
1777 * to occur because for intrinsic reasons cached connections
1778 * that are not privileged would live forever and pollute
1779 * the connection space (and eat up resources). Maybe this
1780 * should be configurable... */
1781 if ( LDAP_BACK_CONN_TAINTED( mc ) || !LDAP_BACK_CONN_CACHED( mc ) ) {
1782 #if META_BACK_PRINT_CONNTREE > 0
1783 meta_back_print_conntree( mi, ">>> meta_back_release_conn" );
1784 #endif /* META_BACK_PRINT_CONNTREE */
1785
1786 if ( LDAP_BACK_PCONN_ISPRIV( mc ) ) {
1787 if ( mc->mc_q.tqe_prev != NULL ) {
1788 assert( LDAP_BACK_CONN_CACHED( mc ) );
1789 assert( mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num > 0 );
1790 LDAP_TAILQ_REMOVE( &mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_priv, mc, mc_q );
1791 mi->mi_conn_priv[ LDAP_BACK_CONN2PRIV( mc ) ].mic_num--;
1792 LDAP_TAILQ_ENTRY_INIT( mc, mc_q );
1793
1794 } else {
1795 assert( !LDAP_BACK_CONN_CACHED( mc ) );
1796 }
1797
1798 } else if ( LDAP_BACK_CONN_CACHED( mc ) ) {
1799 metaconn_t *tmpmc;
1800
1801 tmpmc = ldap_tavl_delete( &mi->mi_conninfo.lai_tree,
1802 ( caddr_t )mc, meta_back_conndnmc_cmp );
1803
1804 /* Overparanoid, but useful... */
1805 assert( tmpmc == NULL || tmpmc == mc );
1806 }
1807
1808 LDAP_BACK_CONN_CACHED_CLEAR( mc );
1809
1810 #if META_BACK_PRINT_CONNTREE > 0
1811 meta_back_print_conntree( mi, "<<< meta_back_release_conn" );
1812 #endif /* META_BACK_PRINT_CONNTREE */
1813
1814 if ( mc->mc_refcnt == 0 ) {
1815 meta_back_conn_free( mc );
1816 mc = NULL;
1817 }
1818 }
1819
1820 if ( mc != NULL && LDAP_BACK_CONN_BINDING( mc ) ) {
1821 LDAP_BACK_CONN_BINDING_CLEAR( mc );
1822 }
1823
1824 if ( dolock ) {
1825 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1826 }
1827 }
1828
1829 void
meta_back_quarantine(Operation * op,SlapReply * rs,int candidate)1830 meta_back_quarantine(
1831 Operation *op,
1832 SlapReply *rs,
1833 int candidate )
1834 {
1835 metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
1836 metatarget_t *mt = mi->mi_targets[ candidate ];
1837
1838 slap_retry_info_t *ri = &mt->mt_quarantine;
1839
1840 ldap_pvt_thread_mutex_lock( &mt->mt_quarantine_mutex );
1841
1842 if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1843 time_t new_last = slap_get_time();
1844
1845 switch ( mt->mt_isquarantined ) {
1846 case LDAP_BACK_FQ_NO:
1847 if ( ri->ri_last == new_last ) {
1848 goto done;
1849 }
1850
1851 Debug( LDAP_DEBUG_ANY,
1852 "%s meta_back_quarantine[%d]: enter.\n",
1853 op->o_log_prefix, candidate );
1854
1855 ri->ri_idx = 0;
1856 ri->ri_count = 0;
1857 break;
1858
1859 case LDAP_BACK_FQ_RETRYING:
1860 Debug(LDAP_DEBUG_ANY,
1861 "%s meta_back_quarantine[%d]: block #%d try #%d failed.\n",
1862 op->o_log_prefix, candidate, ri->ri_idx,
1863 ri->ri_count );
1864
1865 ++ri->ri_count;
1866 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1867 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1868 {
1869 ri->ri_count = 0;
1870 ++ri->ri_idx;
1871 }
1872 break;
1873
1874 default:
1875 goto done;
1876 }
1877
1878 mt->mt_isquarantined = LDAP_BACK_FQ_YES;
1879 ri->ri_last = new_last;
1880
1881 } else if ( mt->mt_isquarantined == LDAP_BACK_FQ_RETRYING ) {
1882 Debug( LDAP_DEBUG_ANY,
1883 "%s meta_back_quarantine[%d]: exit.\n",
1884 op->o_log_prefix, candidate );
1885
1886 if ( mi->mi_quarantine_f ) {
1887 (void)mi->mi_quarantine_f( mi, candidate,
1888 mi->mi_quarantine_p );
1889 }
1890
1891 ri->ri_count = 0;
1892 ri->ri_idx = 0;
1893 mt->mt_isquarantined = LDAP_BACK_FQ_NO;
1894 }
1895
1896 done:;
1897 ldap_pvt_thread_mutex_unlock( &mt->mt_quarantine_mutex );
1898 }
1899