monitor.c 38.6 KB
Newer Older
1
2
3
4
/* init.c - initialize various things */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
Quanah Gibson-Mount's avatar
Quanah Gibson-Mount committed
5
 * Copyright 1998-2021 The OpenLDAP Foundation.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of Michigan at Ann Arbor. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#include "portable.h"

#include <stdio.h>

#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>

#include "lload.h"
#include "lber_pvt.h"
37
#include "lutil.h"
38
39

#include "ldap_rq.h"
40
#include "lload-config.h"
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
#include "../slapd/back-monitor/back-monitor.h"

#define LLOAD_MONITOR_BALANCER_NAME "Load Balancer"
#define LLOAD_MONITOR_BALANCER_RDN \
    SLAPD_MONITOR_AT "=" LLOAD_MONITOR_BALANCER_NAME
#define LLOAD_MONITOR_BALANCER_DN \
    LLOAD_MONITOR_BALANCER_RDN "," SLAPD_MONITOR_BACKEND_DN

#define LLOAD_MONITOR_INCOMING_NAME "Incoming Connections"
#define LLOAD_MONITOR_INCOMING_RDN \
    SLAPD_MONITOR_AT "=" LLOAD_MONITOR_INCOMING_NAME
#define LLOAD_MONITOR_INCOMING_DN \
    LLOAD_MONITOR_INCOMING_RDN "," LLOAD_MONITOR_BALANCER_DN

#define LLOAD_MONITOR_OPERATIONS_NAME "Operations"
#define LLOAD_MONITOR_OPERATIONS_RDN \
    SLAPD_MONITOR_AT "=" LLOAD_MONITOR_OPERATIONS_NAME
#define LLOAD_MONITOR_OPERATIONS_DN \
    LLOAD_MONITOR_OPERATIONS_RDN "," LLOAD_MONITOR_BALANCER_DN

61
62
63
64
#define LLOAD_MONITOR_TIERS_NAME "Backend Tiers"
#define LLOAD_MONITOR_TIERS_RDN SLAPD_MONITOR_AT "=" LLOAD_MONITOR_TIERS_NAME
#define LLOAD_MONITOR_TIERS_DN \
    LLOAD_MONITOR_TIERS_RDN "," LLOAD_MONITOR_BALANCER_DN
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

struct lload_monitor_ops_t {
    struct berval rdn;
} lload_monitor_op[] = {
    { BER_BVC("cn=Bind") },
    { BER_BVC("cn=Other") },

    { BER_BVNULL }
};

static ObjectClass *oc_olmBalancer;
static ObjectClass *oc_olmBalancerServer;
static ObjectClass *oc_olmBalancerConnection;
static ObjectClass *oc_olmBalancerOperation;

static ObjectClass *oc_monitorContainer;
static ObjectClass *oc_monitorCounterObject;

static AttributeDescription *ad_olmServerURI;
static AttributeDescription *ad_olmReceivedOps;
static AttributeDescription *ad_olmForwardedOps;
static AttributeDescription *ad_olmRejectedOps;
static AttributeDescription *ad_olmCompletedOps;
static AttributeDescription *ad_olmFailedOps;
static AttributeDescription *ad_olmConnectionType;
90
static AttributeDescription *ad_olmConnectionState;
91
92
93
94
95
96
static AttributeDescription *ad_olmPendingOps;
static AttributeDescription *ad_olmPendingConnections;
static AttributeDescription *ad_olmActiveConnections;
static AttributeDescription *ad_olmIncomingConnections;
static AttributeDescription *ad_olmOutgoingConnections;

97
98
monitor_subsys_t *lload_monitor_client_subsys;

99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
static struct {
    char *name;
    char *oid;
} s_oid[] = {
    { "olmBalancerAttributes", "olmModuleAttributes:1" },
    { "olmBalancerObjectClasses", "olmModuleObjectClasses:1" },

    { NULL }
};

static struct {
    char *desc;
    AttributeDescription **ad;
} s_at[] = {
    { "( olmBalancerAttributes:1 "
      "NAME ( 'olmServerURI' ) "
      "DESC 'URI of a backend server' "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 "
      "EQUALITY caseIgnoreMatch "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmServerURI },
    { "( olmBalancerAttributes:2 "
      "NAME ( 'olmReceivedOps' ) "
      "DESC 'monitor received operations' "
      "SUP monitorCounter "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmReceivedOps },
    { "( olmBalancerAttributes:3 "
      "NAME ( 'olmForwardedOps' ) "
      "DESC 'monitor forwarded operations' "
      "SUP monitorCounter "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmForwardedOps },
    { "( olmBalancerAttributes:4 "
      "NAME ( 'olmRejectedOps' ) "
      "DESC 'monitor rejected operations' "
      "SUP monitorCounter "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmRejectedOps },
    { "( olmBalancerAttributes:5 "
      "NAME ( 'olmCompletedOps' ) "
      "DESC 'monitor completed operations' "
      "SUP monitorCounter "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmCompletedOps },
    { "( olmBalancerAttributes:6 "
      "NAME ( 'olmFailedOps' ) "
      "DESC 'monitor failed operations' "
      "SUP monitorCounter "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmFailedOps },
    { "( olmBalancerAttributes:7 "
      "NAME ( 'olmPendingOps' ) "
      "DESC 'monitor number of pending operations' "
      "EQUALITY integerMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmPendingOps },
    { "( olmBalancerAttributes:8 "
      "NAME ( 'olmPendingConnections' ) "
      "DESC 'monitor number of pending connections' "
      "EQUALITY integerMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmPendingConnections },
    { "( olmBalancerAttributes:9 "
      "NAME ( 'olmActiveConnections' ) "
      "DESC 'monitor number of active connections' "
      "EQUALITY integerMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmActiveConnections },
    { "( olmBalancerAttributes:10 "
      "NAME ( 'olmConnectionType' ) "
      "DESC 'Connection type' "
183
184
      "EQUALITY caseIgnoreMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 "
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmConnectionType },
    { "( olmBalancerAttributes:11 "
      "NAME ( 'olmIncomingConnections' ) "
      "DESC 'monitor number of incoming connections' "
      "EQUALITY integerMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmIncomingConnections },
    { "( olmBalancerAttributes:12 "
      "NAME ( 'olmOutgoingConnections' ) "
      "DESC 'monitor number of active connections' "
      "EQUALITY integerMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
      "NO-USER-MODIFICATION "
      "USAGE dSAOperation )",
        &ad_olmOutgoingConnections },
204
205
206
207
208
209
210
    { "( olmBalancerAttributes:13 "
      "NAME ( 'olmConnectionState' ) "
      "DESC 'Connection state' "
      "EQUALITY caseIgnoreMatch "
      "SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 "
      "USAGE dSAOperation )",
        &ad_olmConnectionState },
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266

    { NULL }
};

static struct {
    char *name;
    ObjectClass **oc;
} s_moc[] = {
    { "monitorContainer", &oc_monitorContainer },
    { "monitorCounterObject", &oc_monitorCounterObject },

    { NULL }
};

static struct {
    char *desc;
    ObjectClass **oc;
} s_oc[] = {
    { "( olmBalancerObjectClasses:1 "
      "NAME ( 'olmBalancer' ) "
      "SUP top STRUCTURAL "
      "MAY ( "
      "olmIncomingConnections "
      "$ olmOutgoingConnections "
      ") )",
        &oc_olmBalancer },
    { "( olmBalancerObjectClasses:2 "
      "NAME ( 'olmBalancerServer' ) "
      "SUP top STRUCTURAL "
      "MAY ( "
      "olmServerURI "
      "$ olmActiveConnections "
      "$ olmPendingConnections "
      "$ olmPendingOps"
      "$ olmReceivedOps "
      "$ olmCompletedOps "
      "$ olmFailedOps "
      ") )",
        &oc_olmBalancerServer },

    { "( olmBalancerObjectClasses:3 "
      "NAME ( 'olmBalancerOperation' ) "
      "SUP top STRUCTURAL "
      "MAY ( "
      "olmReceivedOps "
      "$ olmForwardedOps "
      "$ olmRejectedOps "
      "$ olmCompletedOps "
      "$ olmFailedOps "
      ") )",
        &oc_olmBalancerOperation },
    { "( olmBalancerObjectClasses:4 "
      "NAME ( 'olmBalancerConnection' ) "
      "SUP top STRUCTURAL "
      "MAY ( "
      "olmConnectionType "
267
      "$ olmConnectionState "
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
      "$ olmPendingOps "
      "$ olmReceivedOps "
      "$ olmCompletedOps "
      "$ olmFailedOps "
      ") )",
        &oc_olmBalancerConnection },
    { NULL }
};

static int
lload_monitor_subsystem_destroy( BackendDB *be, monitor_subsys_t *ms )
{
    return LDAP_SUCCESS;
}

283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
static int
lload_monitor_backend_destroy( BackendDB *be, monitor_subsys_t *ms )
{
    LloadBackend *b = ms->mss_private;
    monitor_extra_t *mbe;
    int rc = LDAP_SUCCESS;

    mbe = (monitor_extra_t *)be->bd_info->bi_extra;
    if ( b->b_monitor ) {
        ms->mss_destroy = lload_monitor_subsystem_destroy;

        assert( b->b_monitor == ms );
        b->b_monitor = NULL;

        rc = mbe->unregister_entry( &ms->mss_ndn );
        ber_memfree( ms->mss_dn.bv_val );
        ber_memfree( ms->mss_ndn.bv_val );
    }

    return rc;
}

305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
static int
lload_monitor_tier_destroy( BackendDB *be, monitor_subsys_t *ms )
{
    LloadTier *tier = ms->mss_private;
    monitor_extra_t *mbe;

    mbe = (monitor_extra_t *)be->bd_info->bi_extra;
    if ( tier->t_monitor ) {
        ms->mss_destroy = lload_monitor_subsystem_destroy;

        assert( tier->t_monitor == ms );
        tier->t_monitor = NULL;

        return mbe->unregister_entry( &ms->mss_ndn );
    }

    return LDAP_SUCCESS;
}

324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
static void
lload_monitor_balancer_dispose( void **priv )
{
    return;
}

static int
lload_monitor_balancer_free( Entry *e, void **priv )
{
    return LDAP_SUCCESS;
}

static int
lload_monitor_balancer_update(
        Operation *op,
        SlapReply *rs,
        Entry *e,
        void *priv )
{
    Attribute *a;

    a = attr_find( e->e_attrs, ad_olmIncomingConnections );
    assert( a != NULL );

    UI2BV( &a->a_vals[0], lload_stats.global_incoming );

    a = attr_find( e->e_attrs, ad_olmOutgoingConnections );
    assert( a != NULL );

    UI2BV( &a->a_vals[0], lload_stats.global_outgoing );
    return SLAP_CB_CONTINUE;
}

static int
lload_monitor_ops_update( Operation *op, SlapReply *rs, Entry *e, void *priv )
{
    Attribute *a;
    lload_counters_t *counters = (lload_counters_t *)priv;

    a = attr_find( e->e_attrs, ad_olmReceivedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], counters->lc_ops_received );

    a = attr_find( e->e_attrs, ad_olmForwardedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], counters->lc_ops_forwarded );

    a = attr_find( e->e_attrs, ad_olmRejectedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], counters->lc_ops_rejected );

    a = attr_find( e->e_attrs, ad_olmCompletedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], counters->lc_ops_completed );

    a = attr_find( e->e_attrs, ad_olmFailedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], counters->lc_ops_failed );

    return SLAP_CB_CONTINUE;
}

static void
lload_monitor_ops_dispose( void **priv )
{
    return;
}

static int
lload_monitor_ops_free( Entry *e, void **priv )
{
    return LDAP_SUCCESS;
}

static int
lload_monitor_balancer_init( BackendDB *be, monitor_subsys_t *ms )
{
    monitor_extra_t *mbe;
    Entry *e;
    int rc;
    monitor_callback_t *cb;
    struct berval value = BER_BVC("0");

    assert( be != NULL );

    mbe = (monitor_extra_t *)be->bd_info->bi_extra;

    dnNormalize( 0, NULL, NULL, &ms->mss_dn, &ms->mss_ndn, NULL );

    e = mbe->entry_stub( &ms->mss_dn, &ms->mss_ndn, &ms->mss_rdn,
            oc_olmBalancer, NULL, NULL );
    if ( e == NULL ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_balancer_init: "
                "unable to create entry \"%s,%s\"\n",
                ms->mss_rdn.bv_val, ms->mss_ndn.bv_val );
        return -1;
    }

    ch_free( ms->mss_ndn.bv_val );
    ber_dupbv( &ms->mss_dn, &e->e_name );
    ber_dupbv( &ms->mss_ndn, &e->e_nname );

    cb = ch_calloc( sizeof(monitor_callback_t), 1 );
    cb->mc_update = lload_monitor_balancer_update;
    cb->mc_free = lload_monitor_balancer_free;
    cb->mc_dispose = lload_monitor_balancer_dispose;
    cb->mc_private = NULL;

    attr_merge_normalize_one( e, ad_olmIncomingConnections, &value, NULL );
    attr_merge_normalize_one( e, ad_olmOutgoingConnections, &value, NULL );

    rc = mbe->register_entry( e, cb, ms, 0 );
    if ( rc != LDAP_SUCCESS ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_balancer_init: "
                "unable to register entry \"%s\" for monitoring\n",
                e->e_name.bv_val );
        goto done;
    }

done:
    entry_free( e );

    return rc;
}

static int
lload_monitor_ops_init( BackendDB *be, monitor_subsys_t *ms )
{
    monitor_extra_t *mbe;
    Entry *e, *parent;
    int rc;
    int i;
    struct berval value = BER_BVC("0");

    assert( be != NULL );

    mbe = (monitor_extra_t *)be->bd_info->bi_extra;

    dnNormalize( 0, NULL, NULL, &ms->mss_dn, &ms->mss_ndn, NULL );
    ms->mss_destroy = lload_monitor_subsystem_destroy;

    parent = mbe->entry_stub( &ms->mss_dn, &ms->mss_ndn, &ms->mss_rdn,
            oc_monitorContainer, NULL, NULL );
    if ( parent == NULL ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_ops_init: "
                "unable to create entry \"%s,%s\"\n",
                ms->mss_rdn.bv_val, ms->mss_ndn.bv_val );
        return -1;
    }
    ch_free( ms->mss_ndn.bv_val );
    ber_dupbv( &ms->mss_dn, &parent->e_name );
    ber_dupbv( &ms->mss_ndn, &parent->e_nname );

    rc = mbe->register_entry( parent, NULL, ms, MONITOR_F_PERSISTENT_CH );
    if ( rc != LDAP_SUCCESS ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_ops_init: "
                "unable to register entry \"%s\" for monitoring\n",
                parent->e_name.bv_val );
        goto done;
    }

    for ( i = 0; lload_monitor_op[i].rdn.bv_val != NULL; i++ ) {
        monitor_callback_t *cb;
        e = mbe->entry_stub( &parent->e_name, &parent->e_nname,
                &lload_monitor_op[i].rdn, oc_olmBalancerOperation, NULL, NULL );
        if ( e == NULL ) {
            Debug( LDAP_DEBUG_ANY, "lload_monitor_ops_init: "
                    "unable to create entry \"%s,%s\"\n",
                    lload_monitor_op[i].rdn.bv_val, parent->e_nname.bv_val );
            return -1;
        }

        /* attr_merge_normalize_one( e, ad_olmDbOperations, &value, NULL ); */

        /*
         * We cannot share a single callback between entries.
         *
         * monitor_cache_destroy() tries to free all callbacks and it's called
         * before mss_destroy() so we have no chance of handling it ourselves
         */
        cb = ch_calloc( sizeof(monitor_callback_t), 1 );
        cb->mc_update = lload_monitor_ops_update;
        cb->mc_free = lload_monitor_ops_free;
        cb->mc_dispose = lload_monitor_ops_dispose;
        cb->mc_private = &lload_stats.counters[i];

        attr_merge_normalize_one( e, ad_olmReceivedOps, &value, NULL );
        attr_merge_normalize_one( e, ad_olmForwardedOps, &value, NULL );
        attr_merge_normalize_one( e, ad_olmRejectedOps, &value, NULL );
        attr_merge_normalize_one( e, ad_olmCompletedOps, &value, NULL );
        attr_merge_normalize_one( e, ad_olmFailedOps, &value, NULL );

        rc = mbe->register_entry( e, cb, ms, 0 );

        entry_free( e );

        if ( rc != LDAP_SUCCESS ) {
            Debug( LDAP_DEBUG_ANY, "lload_monitor_ops_init: "
                    "unable to register entry \"%s\" for monitoring\n",
                    e->e_name.bv_val );
            ch_free( cb );
            break;
        }
    }

done:
    entry_free( parent );
    return rc;
}

534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
static int
lload_monitor_conn_modify( Operation *op, SlapReply *rs, Entry *e, void *priv )
{
    Modifications *m;
    LloadConnection *c = priv;

    for ( m = op->orm_modlist; m; m = m->sml_next ) {
        struct berval closing = BER_BVC("closing");
        int gentle = 1;

        if ( m->sml_flags & SLAP_MOD_INTERNAL ) continue;

        if ( m->sml_desc != ad_olmConnectionState ||
                m->sml_op != LDAP_MOD_REPLACE || m->sml_numvals != 1 ||
                ber_bvcmp( &m->sml_nvalues[0], &closing ) ) {
            return LDAP_OTHER;
        }

        if ( lload_connection_close( c, &gentle ) ) {
            return LDAP_OTHER;
        }
    }
    return SLAP_CB_CONTINUE;
}

559
560
561
562
/*
 * Monitor cache is locked, the connection cannot be unlinked and freed under us.
 * That also means we need to unlock and finish as soon as possible.
 */
563
static int
564
lload_monitor_conn_update( Operation *op, SlapReply *rs, Entry *e, void *priv )
565
{
566
567
568
569
    Attribute *a;
    LloadConnection *c = priv;
    struct berval bv_type, bv_state;
    ldap_pvt_mp_t active, pending, received, completed, failed;
570

571
    CONNECTION_LOCK(c);
572

573
574
575
576
    pending = (ldap_pvt_mp_t)c->c_n_ops_executing;
    received = c->c_counters.lc_ops_received;
    completed = c->c_counters.lc_ops_completed;
    failed = c->c_counters.lc_ops_failed;
577

578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
    switch ( c->c_type ) {
        case LLOAD_C_OPEN: {
            struct berval bv = BER_BVC("regular");
            bv_type = bv;
        } break;
        case LLOAD_C_PREPARING: {
            struct berval bv = BER_BVC("preparing");
            bv_type = bv;
        } break;
        case LLOAD_C_BIND: {
            struct berval bv = BER_BVC("bind");
            bv_type = bv;
        } break;
        case LLOAD_C_PRIVILEGED: {
            struct berval bv = BER_BVC("privileged");
            bv_type = bv;
        } break;
        default: {
            struct berval bv = BER_BVC("unknown");
            bv_type = bv;
        } break;
    }

601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
    switch ( c->c_state ) {
        case LLOAD_C_INVALID: {
            /* *_destroy removes the entry from list before setting c_state to
             * INVALID */
            assert(0);
        } break;
        case LLOAD_C_READY: {
            struct berval bv = BER_BVC("ready");
            bv_state = bv;
        } break;
        case LLOAD_C_CLOSING: {
            struct berval bv = BER_BVC("closing");
            bv_state = bv;
        } break;
        case LLOAD_C_ACTIVE: {
            struct berval bv = BER_BVC("active");
            bv_state = bv;
        } break;
        case LLOAD_C_BINDING: {
            struct berval bv = BER_BVC("binding");
            bv_state = bv;
        } break;
        case LLOAD_C_DYING: {
            /* I guess we got it before it was unlinked? */
            struct berval bv = BER_BVC("dying");
            bv_state = bv;
        } break;
        default: {
            struct berval bv = BER_BVC("unknown");
            bv_state = bv;
        } break;
    }

    CONNECTION_UNLOCK(c);

    a = attr_find( e->e_attrs, ad_olmConnectionType );
    assert( a != NULL );
    if ( !(a->a_flags & SLAP_ATTR_DONT_FREE_DATA) ) {
        ber_memfree( a->a_vals[0].bv_val );
        a->a_flags |= SLAP_ATTR_DONT_FREE_DATA;
    }
    a->a_vals[0] = bv_type;

    a = attr_find( e->e_attrs, ad_olmConnectionState );
    assert( a != NULL );
    if ( !(a->a_flags & SLAP_ATTR_DONT_FREE_DATA) ) {
        ber_memfree( a->a_vals[0].bv_val );
        a->a_flags |= SLAP_ATTR_DONT_FREE_DATA;
    }
    a->a_vals[0] = bv_state;

    a = attr_find( e->e_attrs, ad_olmPendingOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], pending );

    a = attr_find( e->e_attrs, ad_olmReceivedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], received );

    a = attr_find( e->e_attrs, ad_olmCompletedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], completed );

    a = attr_find( e->e_attrs, ad_olmFailedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], failed );

    return SLAP_CB_CONTINUE;
}

int
lload_monitor_conn_unlink( LloadConnection *c )
{
    BackendInfo *mi = backend_info( "monitor" );
    monitor_extra_t *mbe = mi->bi_extra;

    assert( mbe && mbe->is_configured() );

    CONNECTION_ASSERT_LOCKED(c);
    assert( !BER_BVISNULL( &c->c_monitor_dn ) );

    /*
     * Avoid a lock inversion with threads holding monitor cache locks in turn
     * waiting on CONNECTION_LOCK(c)
     */
    CONNECTION_UNLOCK(c);
    mbe->unregister_entry( &c->c_monitor_dn );
    CONNECTION_LOCK(c);

    ber_memfree( c->c_monitor_dn.bv_val );
    BER_BVZERO( &c->c_monitor_dn );
692
693
694
695

    return 0;
}

696
697
int
lload_monitor_conn_entry_create( LloadConnection *c, monitor_subsys_t *ms )
698
{
699
700
701
702
703
704
705
706
707
708
709
    char buf[SLAP_TEXT_BUFLEN];
    char timebuf[LDAP_LUTIL_GENTIME_BUFSIZE];
    struct tm tm;
    struct berval bv_rdn, bv_timestamp, zero = BER_BVC("0"),
                                        value = BER_BVC("unknown");
    monitor_entry_t *mp;
    monitor_callback_t *cb;
    Entry *e;
    Attribute *a;
    BackendInfo *mi = backend_info( "monitor" );
    monitor_extra_t *mbe = mi->bi_extra;
710

711
    assert( mbe && mbe->is_configured() );
712

713
714
    CONNECTION_ASSERT_LOCKED(c);
    assert( BER_BVISNULL( &c->c_monitor_dn ) );
715

716
717
718
    bv_rdn.bv_val = buf;
    bv_rdn.bv_len = snprintf(
            bv_rdn.bv_val, SLAP_TEXT_BUFLEN, "cn=Connection %lu", c->c_connid );
719

720
721
722
    ldap_pvt_gmtime( &c->c_activitytime, &tm );
    bv_timestamp.bv_len = lutil_gentime( timebuf, sizeof(timebuf), &tm );
    bv_timestamp.bv_val = timebuf;
723

724
725
    e = mbe->entry_stub( &ms->mss_dn, &ms->mss_ndn, &bv_rdn,
            oc_olmBalancerConnection, &bv_timestamp, &bv_timestamp );
726

727
728
    cb = ch_calloc( sizeof(monitor_callback_t), 1 );
    cb->mc_update = lload_monitor_conn_update;
729
    cb->mc_modify = lload_monitor_conn_modify;
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
    cb->mc_private = c;

    attr_merge_one( e, ad_olmConnectionType, &value, NULL );
    attr_merge_one( e, ad_olmConnectionState, &value, NULL );
    attr_merge_one( e, ad_olmPendingOps, &zero, NULL );
    attr_merge_one( e, ad_olmReceivedOps, &zero, NULL );
    attr_merge_one( e, ad_olmCompletedOps, &zero, NULL );
    attr_merge_one( e, ad_olmFailedOps, &zero, NULL );

    if ( mbe->register_entry( e, cb, NULL, 0 ) ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_conn_entry_create: "
                "failed to register monitor entry for connid=%lu\n",
                c->c_connid );

        ch_free( cb );
        entry_free( e );
        return -1;
    }

    ber_dupbv( &c->c_monitor_dn, &e->e_nname );
    entry_free( e );
751
752
753
754

    return 0;
}

755
static int
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
lload_monitor_incoming_conn_init( BackendDB *be, monitor_subsys_t *ms )
{
    monitor_extra_t *mbe;
    Entry *e;
    int rc;

    assert( be != NULL );
    mbe = (monitor_extra_t *)be->bd_info->bi_extra;

    ms->mss_destroy = lload_monitor_subsystem_destroy;

    dnNormalize( 0, NULL, NULL, &ms->mss_dn, &ms->mss_ndn, NULL );

    e = mbe->entry_stub( &ms->mss_dn, &ms->mss_ndn, &ms->mss_rdn,
            oc_monitorContainer, NULL, NULL );
    if ( e == NULL ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_incoming_conn_init: "
                "unable to create entry \"%s,%s\"\n",
                ms->mss_rdn.bv_val, ms->mss_ndn.bv_val );
        return -1;
    }
    ch_free( ms->mss_ndn.bv_val );
    ber_dupbv( &ms->mss_dn, &e->e_name );
    ber_dupbv( &ms->mss_ndn, &e->e_nname );

781
    rc = mbe->register_entry( e, NULL, ms, 0 );
782
783
784
785
786
787
788

    if ( rc != LDAP_SUCCESS ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_incoming_conn_init: "
                "unable to register entry \"%s\" for monitoring\n",
                e->e_name.bv_val );
        goto done;
    }
789
790
791

    lload_monitor_client_subsys = ms;

792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
done:
    entry_free( e );

    return rc;
}

static int
lload_monitor_server_update(
        Operation *op,
        SlapReply *rs,
        Entry *e,
        void *priv )
{
    Attribute *a;
    LloadBackend *b = priv;
    LloadConnection *c;
    LloadPendingConnection *pc;
    ldap_pvt_mp_t active = 0, pending = 0, received = 0, completed = 0,
                  failed = 0;
    int i;

Ondřej Kuzník's avatar
Ondřej Kuzník committed
813
    checked_lock( &b->b_mutex );
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
    active = b->b_active + b->b_bindavail;

    LDAP_CIRCLEQ_FOREACH ( c, &b->b_preparing, c_next ) {
        pending++;
    }

    LDAP_LIST_FOREACH( pc, &b->b_connecting, next ) {
        pending++;
    }

    for ( i = 0; i < LLOAD_STATS_OPS_LAST; i++ ) {
        received += b->b_counters[i].lc_ops_received;
        completed += b->b_counters[i].lc_ops_completed;
        failed += b->b_counters[i].lc_ops_failed;
    }

    a = attr_find( e->e_attrs, ad_olmPendingOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], (long long unsigned int)b->b_n_ops_executing );

Ondřej Kuzník's avatar
Ondřej Kuzník committed
834
    checked_unlock( &b->b_mutex );
835

836
837
838
839
840
841
    /* Right now, there is no way to retrieve the entry from monitor's
     * cache to replace URI at the moment it is modified */
    a = attr_find( e->e_attrs, ad_olmServerURI );
    assert( a != NULL );
    ber_bvreplace( &a->a_vals[0], &b->b_uri );

842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
    a = attr_find( e->e_attrs, ad_olmActiveConnections );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], active );

    a = attr_find( e->e_attrs, ad_olmPendingConnections );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], pending );

    a = attr_find( e->e_attrs, ad_olmReceivedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], received );

    a = attr_find( e->e_attrs, ad_olmCompletedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], completed );

    a = attr_find( e->e_attrs, ad_olmFailedOps );
    assert( a != NULL );
    UI2BV( &a->a_vals[0], failed );

    return SLAP_CB_CONTINUE;
}

static int
lload_monitor_backend_open( BackendDB *be, monitor_subsys_t *ms )
{
    Entry *e;
    struct berval value = BER_BVC("0");
    monitor_extra_t *mbe;
    monitor_callback_t *cb;
    LloadBackend *b = ms->mss_private;
873
    LloadTier *tier = b->b_tier;
874
875
876
877
878
    int rc;

    assert( be != NULL );
    mbe = (monitor_extra_t *)be->bd_info->bi_extra;

879
880
    e = mbe->entry_stub( &tier->t_monitor->mss_dn, &tier->t_monitor->mss_ndn,
            &ms->mss_rdn, oc_olmBalancerServer, NULL, NULL );
881
882
883
    if ( e == NULL ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_backend_open: "
                "unable to create entry \"%s,%s\"\n",
884
                ms->mss_rdn.bv_val, tier->t_monitor->mss_dn.bv_val );
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
        return -1;
    }

    ber_dupbv( &ms->mss_dn, &e->e_name );
    ber_dupbv( &ms->mss_ndn, &e->e_nname );

    cb = ch_calloc( sizeof(monitor_callback_t), 1 );
    cb->mc_update = lload_monitor_server_update;
    cb->mc_free = NULL;
    cb->mc_dispose = NULL;
    cb->mc_private = b;

    attr_merge_normalize_one( e, ad_olmServerURI, &b->b_uri, NULL );
    attr_merge_normalize_one( e, ad_olmActiveConnections, &value, NULL );
    attr_merge_normalize_one( e, ad_olmPendingConnections, &value, NULL );
    attr_merge_normalize_one( e, ad_olmPendingOps, &value, NULL );
    attr_merge_normalize_one( e, ad_olmReceivedOps, &value, NULL );
    attr_merge_normalize_one( e, ad_olmCompletedOps, &value, NULL );
    attr_merge_normalize_one( e, ad_olmFailedOps, &value, NULL );

905
    rc = mbe->register_entry( e, cb, ms, 0 );
906
907
908
909
910
911
912

    if ( rc != LDAP_SUCCESS ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_backend_open: "
                "unable to register entry \"%s\" for monitoring\n",
                e->e_name.bv_val );
        goto done;
    }
913
914
915

    ms->mss_destroy = lload_monitor_backend_destroy;

916
917
done:
    entry_free( e );
918
919
920
921
    return rc;
}

int
922
923
924
925
lload_monitor_backend_init(
        BackendInfo *bi,
        monitor_subsys_t *ms,
        LloadBackend *b )
926
{
927
    monitor_extra_t *mbe = bi->bi_extra;
928
929
930
931
932
933
934
935
936
937
938
    monitor_subsys_t *bk_mss;

    /* FIXME: With back-monitor as it works now, there is no way to know when
     * this can be safely freed so we leak it on shutdown */
    bk_mss = ch_calloc( 1, sizeof(monitor_subsys_t) );
    bk_mss->mss_rdn.bv_len = sizeof("cn=") + b->b_name.bv_len;
    bk_mss->mss_rdn.bv_val = ch_malloc( bk_mss->mss_rdn.bv_len );
    bk_mss->mss_rdn.bv_len = snprintf( bk_mss->mss_rdn.bv_val,
            bk_mss->mss_rdn.bv_len, "cn=%s", b->b_name.bv_val );

    bk_mss->mss_name = b->b_name.bv_val;
939
    bk_mss->mss_flags = MONITOR_F_NONE;
940
941
942
943
944
945
946
947
948
    bk_mss->mss_open = lload_monitor_backend_open;
    bk_mss->mss_destroy = lload_monitor_subsystem_destroy;
    bk_mss->mss_update = NULL;
    bk_mss->mss_private = b;

    if ( mbe->register_subsys_late( bk_mss ) ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_backend_init: "
                "failed to register backend %s\n",
                bk_mss->mss_name );
949
        ch_free( bk_mss );
950
951
        return -1;
    }
952
953

    b->b_monitor = bk_mss;
954
955
956
    return LDAP_SUCCESS;
}

957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
static int
lload_monitor_tier_open( BackendDB *be, monitor_subsys_t *ms )
{
    Entry *e;
    monitor_extra_t *mbe;
    LloadTier *tier = ms->mss_private;
    int rc;

    assert( be != NULL );
    mbe = (monitor_extra_t *)be->bd_info->bi_extra;

    dnNormalize( 0, NULL, NULL, &ms->mss_dn, &ms->mss_ndn, NULL );
    e = mbe->entry_stub( &ms->mss_dn, &ms->mss_ndn, &ms->mss_rdn,
            oc_monitorContainer, NULL, NULL );
    if ( e == NULL ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_tier_open: "
                "unable to create entry \"%s,%s\"\n",
                ms->mss_rdn.bv_val, ms->mss_ndn.bv_val );
        return -1;
    }

    ch_free( ms->mss_ndn.bv_val );
    ber_dupbv( &ms->mss_dn, &e->e_name );
    ber_dupbv( &ms->mss_ndn, &e->e_nname );

    rc = mbe->register_entry( e, NULL, ms, MONITOR_F_PERSISTENT_CH );

    if ( rc != LDAP_SUCCESS ) {
        Debug( LDAP_DEBUG_ANY, "lload_monitor_tier_open: "
                "unable to register entry \"%s\" for monitoring\n",
                e->e_name.bv_val );
        goto done;
    }

    tier->t_monitor = ms;
    ms->mss_destroy = lload_monitor_tier_destroy;

done:
    entry_free( e );
    return rc;
}

999
int
1000
lload_monitor_tier_init( BackendInfo *bi, LloadTier *tier )