summaryrefslogtreecommitdiffstats
path: root/xlators/cluster/afr/src/afr.c
blob: 2c0ff05fd7866c3cddbe980d1f9e7913b502f14e (plain)
1
2
3
4
5
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
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
90
91
92
93
94
95
96
97
98
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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
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
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
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
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
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
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
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
/*
  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
  This file is part of GlusterFS.

  This file is licensed to you under your choice of the GNU Lesser
  General Public License, version 3 or any later version (LGPLv3 or
  later), or the GNU General Public License, version 2 (GPLv2), in all
  cases as published by the Free Software Foundation.
*/

#include <libgen.h>
#include <unistd.h>
#include <fnmatch.h>
#include <sys/time.h>
#include <stdlib.h>
#include <signal.h>

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "afr-common.c"

struct volume_options options[];

int32_t
notify (xlator_t *this, int32_t event,
        void *data, ...)
{
        int ret = -1;
        va_list         ap;
        void *data2 = NULL;

        va_start (ap, data);
        data2 = va_arg (ap, dict_t*);
        va_end (ap);
        ret = afr_notify (this, event, data, data2);

        return ret;
}

int32_t
mem_acct_init (xlator_t *this)
{
        int     ret = -1;

        if (!this)
                return ret;

        ret = xlator_mem_acct_init (this, gf_afr_mt_end + 1);

        if (ret != 0) {
                gf_log(this->name, GF_LOG_ERROR, "Memory accounting init"
                       "failed");
                return ret;
        }

        return ret;
}


int
xlator_subvolume_index (xlator_t *this, xlator_t *subvol)
{
        int index = -1;
        int i = 0;
        xlator_list_t *list = NULL;

        list = this->children;

        while (list) {
                if (subvol == list->xlator ||
                    strcmp (subvol->name, list->xlator->name) == 0) {
                        index = i;
                        break;
                }
                list = list->next;
                i++;
        }

        return index;
}

void
fix_quorum_options (xlator_t *this, afr_private_t *priv, char *qtype)
{
        if (priv->quorum_count && strcmp(qtype,"fixed")) {
                gf_msg (this->name,GF_LOG_WARNING, 0, AFR_MSG_QUORUM_OVERRIDE,
                       "quorum-type %s overriding quorum-count %u",
                       qtype, priv->quorum_count);
        }
        if (!strcmp(qtype,"none")) {
                priv->quorum_count = 0;
        }
        else if (!strcmp(qtype,"auto")) {
                priv->quorum_count = AFR_QUORUM_AUTO;
        }
}

int
reconfigure (xlator_t *this, dict_t *options)
{
        afr_private_t *priv        = NULL;
        xlator_t      *read_subvol = NULL;
        int            read_subvol_index = -1;
        int            ret         = -1;
        int            index       = -1;
        char          *qtype       = NULL;

        priv = this->private;

	GF_OPTION_RECONF ("afr-dirty-xattr",
			  priv->afr_dirty, options, str,
			  out);

	GF_OPTION_RECONF ("metadata-splitbrain-forced-heal",
			  priv->metadata_splitbrain_forced_heal, options, bool,
			  out);

        GF_OPTION_RECONF ("background-self-heal-count",
                          priv->background_self_heal_count, options, uint32,
                          out);

        GF_OPTION_RECONF ("metadata-self-heal",
                          priv->metadata_self_heal, options, bool, out);

        GF_OPTION_RECONF ("data-self-heal", priv->data_self_heal, options, str,
                          out);

        GF_OPTION_RECONF ("entry-self-heal", priv->entry_self_heal, options,
                          bool, out);

        GF_OPTION_RECONF ("data-self-heal-window-size",
                          priv->data_self_heal_window_size, options,
                          uint32, out);

        GF_OPTION_RECONF ("data-change-log", priv->data_change_log, options,
                          bool, out);

        GF_OPTION_RECONF ("metadata-change-log",
                          priv->metadata_change_log, options, bool, out);

        GF_OPTION_RECONF ("entry-change-log", priv->entry_change_log, options,
                          bool, out);

        GF_OPTION_RECONF ("data-self-heal-algorithm",
                          priv->data_self_heal_algorithm, options, str, out);

        GF_OPTION_RECONF ("read-subvolume", read_subvol, options, xlator, out);

        GF_OPTION_RECONF ("read-hash-mode", priv->hash_mode,
                          options, uint32, out);

        if (read_subvol) {
                index = xlator_subvolume_index (this, read_subvol);
                if (index == -1) {
                        gf_log (this->name, GF_LOG_ERROR, "%s not a subvolume",
                                read_subvol->name);
                        goto out;
                }
                priv->read_child = index;
        }

        GF_OPTION_RECONF ("read-subvolume-index",read_subvol_index, options,int32,out);

        if (read_subvol_index >-1) {
                index=read_subvol_index;
                if (index >= priv->child_count) {
                        gf_log (this->name, GF_LOG_ERROR, "%d not a subvolume-index",
                                index);
                        goto out;
                }
                priv->read_child = index;
        }

        GF_OPTION_RECONF ("pre-op-compat", priv->pre_op_compat, options, bool, out);

        GF_OPTION_RECONF ("eager-lock", priv->eager_lock, options, bool, out);
        GF_OPTION_RECONF ("quorum-type", qtype, options, str, out);
        GF_OPTION_RECONF ("quorum-count", priv->quorum_count, options,
                          uint32, out);
        fix_quorum_options(this,priv,qtype);
        if (priv->quorum_count && !afr_has_quorum (priv->child_up, this))
                gf_msg (this->name, GF_LOG_WARNING, 0, AFR_MSG_QUORUM_FAIL,
                        "Client-quorum is not met");


	GF_OPTION_RECONF ("post-op-delay-secs", priv->post_op_delay_secs, options,
			  uint32, out);

        GF_OPTION_RECONF (AFR_SH_READDIR_SIZE_KEY, priv->sh_readdir_size,
                          options, size_uint64, out);
        /* Reset this so we re-discover in case the topology changed.  */
        GF_OPTION_RECONF ("ensure-durability", priv->ensure_durability, options,
                          bool, out);

	GF_OPTION_RECONF ("self-heal-daemon", priv->shd.enabled, options,
			  bool, out);

	GF_OPTION_RECONF ("iam-self-heal-daemon", priv->shd.iamshd, options,
			  bool, out);

        priv->did_discovery = _gf_false;

        ret = 0;
out:
        return ret;

}


static const char *favorite_child_warning_str = "You have specified subvolume '%s' "
        "as the 'favorite child'. This means that if a discrepancy in the content "
        "or attributes (ownership, permission, etc.) of a file is detected among "
        "the subvolumes, the file on '%s' will be considered the definitive "
        "version and its contents will OVERWRITE the contents of the file on other "
        "subvolumes. All versions of the file except that on '%s' "
        "WILL BE LOST.";


int32_t
init (xlator_t *this)
{
        afr_private_t *priv        = NULL;
        int            child_count = 0;
        xlator_list_t *trav        = NULL;
        int            i           = 0;
        int            ret         = -1;
        GF_UNUSED int  op_errno    = 0;
        xlator_t      *read_subvol = NULL;
        int            read_subvol_index = -1;
        xlator_t      *fav_child   = NULL;
        char          *qtype       = NULL;

        if (!this->children) {
                gf_log (this->name, GF_LOG_ERROR,
                        "replicate translator needs more than one "
                        "subvolume defined.");
                return -1;
        }

        if (!this->parents) {
                gf_log (this->name, GF_LOG_WARNING,
                        "Volume is dangling.");
        }

	this->private = GF_CALLOC (1, sizeof (afr_private_t),
                                   gf_afr_mt_afr_private_t);
        if (!this->private)
                goto out;

        priv = this->private;
        LOCK_INIT (&priv->lock);

        child_count = xlator_subvolume_count (this);

        priv->child_count = child_count;

        priv->read_child = -1;

	GF_OPTION_INIT ("afr-dirty-xattr", priv->afr_dirty, str, out);

	GF_OPTION_INIT ("metadata-splitbrain-forced-heal",
			priv->metadata_splitbrain_forced_heal, bool, out);

        GF_OPTION_INIT ("read-subvolume", read_subvol, xlator, out);
        if (read_subvol) {
                priv->read_child = xlator_subvolume_index (this, read_subvol);
                if (priv->read_child == -1) {
                        gf_log (this->name, GF_LOG_ERROR, "%s not a subvolume",
                                read_subvol->name);
                        goto out;
                }
        }
        GF_OPTION_INIT ("read-subvolume-index",read_subvol_index,int32,out);
        if (read_subvol_index > -1) {
                if (read_subvol_index >= priv->child_count) {
                        gf_log (this->name, GF_LOG_ERROR, "%d not a subvolume-index",
                                read_subvol_index);
                        goto out;
                }
                priv->read_child = read_subvol_index;
        }
        GF_OPTION_INIT ("choose-local", priv->choose_local, bool, out);

        GF_OPTION_INIT ("read-hash-mode", priv->hash_mode, uint32, out);

        priv->favorite_child = -1;
        GF_OPTION_INIT ("favorite-child", fav_child, xlator, out);
        if (fav_child) {
                priv->favorite_child = xlator_subvolume_index (this, fav_child);
                if (priv->favorite_child == -1) {
                        gf_log (this->name, GF_LOG_ERROR, "%s not a subvolume",
                                fav_child->name);
                        goto out;
                }
                gf_log (this->name, GF_LOG_WARNING,
                        favorite_child_warning_str, fav_child->name,
                        fav_child->name, fav_child->name);
        }


        GF_OPTION_INIT ("background-self-heal-count",
                        priv->background_self_heal_count, uint32, out);

        GF_OPTION_INIT ("data-self-heal", priv->data_self_heal, str, out);

        GF_OPTION_INIT ("data-self-heal-algorithm",
                        priv->data_self_heal_algorithm, str, out);

        GF_OPTION_INIT ("data-self-heal-window-size",
                        priv->data_self_heal_window_size, uint32, out);

        GF_OPTION_INIT ("metadata-self-heal", priv->metadata_self_heal, bool,
                        out);

        GF_OPTION_INIT ("entry-self-heal", priv->entry_self_heal, bool, out);

        GF_OPTION_INIT ("data-change-log", priv->data_change_log, bool, out);

        GF_OPTION_INIT ("metadata-change-log", priv->metadata_change_log, bool,
                        out);

        GF_OPTION_INIT ("entry-change-log", priv->entry_change_log, bool, out);

        GF_OPTION_INIT ("optimistic-change-log", priv->optimistic_change_log,
                        bool, out);

        GF_OPTION_INIT ("inodelk-trace", priv->inodelk_trace, bool, out);

        GF_OPTION_INIT ("entrylk-trace", priv->entrylk_trace, bool, out);

        GF_OPTION_INIT ("pre-op-compat", priv->pre_op_compat, bool, out);

        GF_OPTION_INIT ("eager-lock", priv->eager_lock, bool, out);
        GF_OPTION_INIT ("quorum-type", qtype, str, out);
        GF_OPTION_INIT ("quorum-count", priv->quorum_count, uint32, out);
        GF_OPTION_INIT (AFR_SH_READDIR_SIZE_KEY, priv->sh_readdir_size, size_uint64,
                        out);
        fix_quorum_options(this,priv,qtype);

	GF_OPTION_INIT ("post-op-delay-secs", priv->post_op_delay_secs, uint32, out);
        GF_OPTION_INIT ("ensure-durability", priv->ensure_durability, bool,
                        out);

	GF_OPTION_INIT ("self-heal-daemon", priv->shd.enabled, bool, out);

	GF_OPTION_INIT ("iam-self-heal-daemon", priv->shd.iamshd, bool, out);

        priv->wait_count = 1;

        priv->child_up = GF_CALLOC (sizeof (unsigned char), child_count,
                                    gf_afr_mt_char);
        if (!priv->child_up) {
                ret = -ENOMEM;
                goto out;
        }

        for (i = 0; i < child_count; i++)
                priv->child_up[i] = -1; /* start with unknown state.
                                           this initialization needed
                                           for afr_notify() to work
                                           reliably
                                        */

        priv->children = GF_CALLOC (sizeof (xlator_t *), child_count,
                                    gf_afr_mt_xlator_t);
        if (!priv->children) {
                ret = -ENOMEM;
                goto out;
        }

        priv->pending_key = GF_CALLOC (sizeof (*priv->pending_key),
                                       child_count,
                                       gf_afr_mt_char);
        if (!priv->pending_key) {
                ret = -ENOMEM;
                goto out;
        }

        trav = this->children;
        i = 0;
        while (i < child_count) {
                priv->children[i] = trav->xlator;

                ret = gf_asprintf (&priv->pending_key[i], "%s.%s",
                                   AFR_XATTR_PREFIX,
                                   trav->xlator->name);
                if (-1 == ret) {
                        ret = -ENOMEM;
                        goto out;
                }

                trav = trav->next;
                i++;
        }

        ret = gf_asprintf (&priv->sh_domain, AFR_SH_DATA_DOMAIN_FMT,
                           this->name);
        if (-1 == ret) {
                ret = -ENOMEM;
                goto out;
        }

        priv->last_event = GF_CALLOC (child_count, sizeof (*priv->last_event),
                                      gf_afr_mt_int32_t);
        if (!priv->last_event) {
                ret = -ENOMEM;
                goto out;
        }

	ret = afr_selfheal_daemon_init (this);
	if (ret) {
		ret = -ENOMEM;
		goto out;
	}

        /* keep more local here as we may need them for self-heal etc */
        this->local_pool = mem_pool_new (afr_local_t, 512);
        if (!this->local_pool) {
                ret = -1;
                gf_log (this->name, GF_LOG_ERROR,
                        "failed to create local_t's memory pool");
                goto out;
        }

        priv->root_inode = NULL;

        ret = 0;
out:
        return ret;
}


int
fini (xlator_t *this)
{
        afr_private_t *priv = NULL;

        priv = this->private;
        this->private = NULL;
        afr_priv_destroy (priv);
        //if (this->itable);//I dont see any destroy func

        return 0;
}


struct xlator_fops fops = {
        .lookup      = afr_lookup,
        .open        = afr_open,
        .lk          = afr_lk,
        .flush       = afr_flush,
        .statfs      = afr_statfs,
        .fsync       = afr_fsync,
        .fsyncdir    = afr_fsyncdir,
        .xattrop     = afr_xattrop,
        .fxattrop    = afr_fxattrop,
        .inodelk     = afr_inodelk,
        .finodelk    = afr_finodelk,
        .entrylk     = afr_entrylk,
        .fentrylk    = afr_fentrylk,

        /* inode read */
        .access      = afr_access,
        .stat        = afr_stat,
        .fstat       = afr_fstat,
        .readlink    = afr_readlink,
        .getxattr    = afr_getxattr,
        .fgetxattr   = afr_fgetxattr,
        .readv       = afr_readv,

        /* inode write */
        .writev      = afr_writev,
        .truncate    = afr_truncate,
        .ftruncate   = afr_ftruncate,
        .setxattr    = afr_setxattr,
        .fsetxattr   = afr_fsetxattr,
        .setattr     = afr_setattr,
        .fsetattr    = afr_fsetattr,
        .removexattr = afr_removexattr,
        .fremovexattr = afr_fremovexattr,
        .fallocate   = afr_fallocate,
        .discard     = afr_discard,
        .zerofill    = afr_zerofill,

        /* dir read */
        .opendir     = afr_opendir,
        .readdir     = afr_readdir,
        .readdirp    = afr_readdirp,

        /* dir write */
        .create      = afr_create,
        .mknod       = afr_mknod,
        .mkdir       = afr_mkdir,
        .unlink      = afr_unlink,
        .rmdir       = afr_rmdir,
        .link        = afr_link,
        .symlink     = afr_symlink,
        .rename      = afr_rename,
};


struct xlator_dumpops dumpops = {
        .priv       = afr_priv_dump,
};


struct xlator_cbks cbks = {
        .release     = afr_release,
        .releasedir  = afr_releasedir,
        .forget      = afr_forget,
};


struct volume_options options[] = {
        { .key  = {"read-subvolume" },
          .type = GF_OPTION_TYPE_XLATOR,
          .description = "inode-read fops happen only on one of the bricks in "
                         "replicate. Afr will prefer the one specified using "
                         "this option if it is not stale. Option value must be "
                         "one of the xlator names of the children. "
                         "Ex: <volname>-client-0 till "
                         "<volname>-client-<number-of-bricks - 1>"
        },
        { .key  = {"read-subvolume-index" },
          .type = GF_OPTION_TYPE_INT,
          .default_value = "-1",
          .description = "inode-read fops happen only on one of the bricks in "
                         "replicate. AFR will prefer the one specified using "
                         "this option if it is not stale. allowed options"
                         " include -1 till replica-count - 1"
        },
        { .key = {"read-hash-mode" },
          .type = GF_OPTION_TYPE_INT,
          .min = 0,
          .max = 2,
          .default_value = "1",
          .description = "inode-read fops happen only on one of the bricks in "
                         "replicate. AFR will prefer the one computed using "
                         "the method specified using this option"
                         "0 = first up server, "
                         "1 = hash by GFID of file (all clients use "
                                                    "same subvolume), "
                         "2 = hash by GFID of file and client PID",
        },
        { .key  = {"choose-local" },
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "true",
          .description = "Choose a local subvolume (i.e. Brick) to read from"
	                 " if read-subvolume is not explicitly set.",
        },
        { .key  = {"favorite-child"},
          .type = GF_OPTION_TYPE_XLATOR,
          .description = "If a split-brain happens choose subvol/brick set by "
                         "this option as source."
        },
        { .key  = {"background-self-heal-count"},
          .type = GF_OPTION_TYPE_INT,
          .min  = 0,
          .default_value = "16",
          .validate = GF_OPT_VALIDATE_MIN,
          .description = "This specifies the number of self-heals that can be "
                         " performed in background without blocking the fop"
        },
        { .key  = {"data-self-heal"},
          .type = GF_OPTION_TYPE_STR,
          .value = {"1", "on", "yes", "true", "enable",
                    "0", "off", "no", "false", "disable",
                    "open"},
          .default_value = "on",
          .description   = "Using this option we can enable/disable data "
                           "self-heal on the file. \"open\" means data "
                           "self-heal action will only be triggered by file "
                           "open operations."
        },
        { .key  = {"data-self-heal-algorithm"},
          .type = GF_OPTION_TYPE_STR,
          .description   = "Select between \"full\", \"diff\". The "
                           "\"full\" algorithm copies the entire file from "
                           "source to sink. The \"diff\" algorithm copies to "
                           "sink only those blocks whose checksums don't match "
                           "with those of source. If no option is configured "
                           "the option is chosen dynamically as follows: "
                           "If the file does not exist on one of the sinks "
                           "or empty file exists or if the source file size is "
                           "about the same as page size the entire file will "
                           "be read and written i.e \"full\" algo, "
                           "otherwise \"diff\" algo is chosen.",
          .value = { "diff", "full"}
        },
        { .key  = {"data-self-heal-window-size"},
          .type = GF_OPTION_TYPE_INT,
          .min  = 1,
          .max  = 1024,
          .default_value = "1",
          .description = "Maximum number blocks per file for which self-heal "
                         "process would be applied simultaneously."
        },
        { .key  = {"metadata-self-heal"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Using this option we can enable/disable metadata "
                         "i.e. Permissions, ownerships, xattrs self-heal on "
                         "the file/directory."
        },
        { .key  = {"entry-self-heal"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Using this option we can enable/disable entry "
                         "self-heal on the directory."
        },
        { .key  = {"data-change-log"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Data fops like write/truncate will not perform "
                         "pre/post fop changelog operations in afr transaction "
                         "if this option is disabled"
        },
        { .key  = {"metadata-change-log"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Metadata fops like setattr/setxattr will not perform "
                         "pre/post fop changelog operations in afr transaction "
                         "if this option is disabled"
        },
        { .key  = {"entry-change-log"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Entry fops like create/unlink will not perform "
                         "pre/post fop changelog operations in afr transaction "
                         "if this option is disabled"
        },
        { .key  = {"optimistic-change-log"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Entry/Metadata fops will not perform "
                         "pre fop changelog operations in afr transaction "
                         "if this option is enabled."
        },
        { .key = {"inodelk-trace"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Enabling this option logs inode lock/unlocks"
        },
        { .key = {"entrylk-trace"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Enabling this option logs entry lock/unlocks"
        },
	{ .key = {"pre-op-compat"},
	  .type = GF_OPTION_TYPE_BOOL,
	  .default_value = "on",
	  .description = "Use separate pre-op xattrop() FOP rather than "
	                 "overloading xdata of the OP"
	},
        { .key = {"eager-lock"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Lock phase of a transaction has two sub-phases. "
                         "First is an attempt to acquire locks in parallel by "
                         "broadcasting non-blocking lock requests. If lock "
                         "acquisition fails on any server, then the held locks "
                         "are unlocked and revert to a blocking locked mode "
                         "sequentially on one server after another.  If this "
                         "option is enabled the initial broadcasting lock "
                         "request attempt to acquire lock on the entire file. "
                         "If this fails, we revert back to the sequential "
                         "\"regional\" blocking lock as before. In the case "
                         "where such an \"eager\" lock is granted in the "
                         "non-blocking phase, it gives rise to an opportunity "
                         "for optimization. i.e, if the next write transaction "
                         "on the same FD arrives before the unlock phase of "
                         "the first transaction, it \"takes over\" the full "
                         "file lock. Similarly if yet another data transaction "
                         "arrives before the unlock phase of the \"optimized\" "
                         "transaction, that in turn \"takes over\" the lock as "
                         "well. The actual unlock now happens at the end of "
                         "the last \"optimized\" transaction."

        },
        { .key = {"self-heal-daemon"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "This option applies to only self-heal-daemon. "
                         "Index directory crawl and automatic healing of files "
                         "will not be performed if this option is turned off."
        },
        { .key = {"iam-self-heal-daemon"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "This option differentiates if the replicate "
                         "translator is running as part of self-heal-daemon "
                         "or not."
        },
        { .key = {"quorum-type"},
          .type = GF_OPTION_TYPE_STR,
          .value = { "none", "auto", "fixed"},
          .default_value = "none",
          .description = "If value is \"fixed\" only allow writes if "
                         "quorum-count bricks are present.  If value is "
                         "\"auto\" only allow writes if more than half of "
                         "bricks, or exactly half including the first, are "
                         "present.",
        },
        { .key = {"quorum-count"},
          .type = GF_OPTION_TYPE_INT,
          .min = 1,
          .max = INT_MAX,
          .default_value = 0,
          .description = "If quorum-type is \"fixed\" only allow writes if "
                         "this many bricks or present.  Other quorum types "
                         "will OVERWRITE this value.",
        },
        { .key  = {"node-uuid"},
          .type = GF_OPTION_TYPE_STR,
          .description = "Local glusterd uuid string, used in starting "
                         "self-heal-daemon so that it can crawl only on "
                         "local index directories.",
        },
        { .key  = {"post-op-delay-secs"},
          .type = GF_OPTION_TYPE_INT,
          .min  = 0,
          .max  = INT_MAX,
          .default_value = "1",
          .description = "Time interval induced artificially before "
	                 "post-operation phase of the transaction to "
                         "enhance overlap of adjacent write operations.",
        },
        { .key = {AFR_SH_READDIR_SIZE_KEY},
          .type = GF_OPTION_TYPE_SIZET,
          .description = "readdirp size for performing entry self-heal",
          .min = 1024,
          .max = 131072,
          .default_value = "1KB",
        },
        { .key = {"ensure-durability"},
          .type = GF_OPTION_TYPE_BOOL,
          .description = "Afr performs fsyncs for transactions if this "
                         "option is on to make sure the changelogs/data is "
                         "written to the disk",
          .default_value = "on",
        },
	{ .key = {"afr-dirty-xattr"},
	  .type = GF_OPTION_TYPE_STR,
	  .default_value = AFR_DIRTY_DEFAULT,
	},
	{ .key = {"metadata-splitbrain-forced-heal"},
	  .type = GF_OPTION_TYPE_BOOL,
	  .default_value = "off",
	},
        { .key  = {NULL} },
};