summaryrefslogtreecommitdiffstats
path: root/xlators/nfs/server/src/nfs.c
blob: c3a76c63e30c5e2379362b32aee5f223bda82325 (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
754
755
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
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
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
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
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
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
/*
  Copyright (c) 2010-2011 Gluster, Inc. <http://www.gluster.com>
  This file is part of GlusterFS.

  GlusterFS is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published
  by the Free Software Foundation; either version 3 of the License,
  or (at your option) any later version.

  GlusterFS is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see
  <http://www.gnu.org/licenses/>.
*/

/* This is the primary translator source for NFS.
 * Every other protocol version gets initialized from here.
 */


#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include "defaults.h"
#include "rpcsvc.h"
#include "dict.h"
#include "xlator.h"
#include "nfs.h"
#include "mem-pool.h"
#include "logging.h"
#include "nfs-fops.h"
#include "inode.h"
#include "mount3.h"
#include "nfs3.h"
#include "nfs-mem-types.h"
#include "nfs3-helpers.h"
#include "nlm4.h"
#include "options.h"
#include "acl3.h"
#include "rpc-drc.h"

#define STRINGIFY(val) #val
#define TOSTRING(val) STRINGIFY(val)

#define OPT_SERVER_AUX_GIDS             "nfs.server-aux-gids"
#define OPT_SERVER_GID_CACHE_TIMEOUT    "nfs.server.aux-gid-timeout"

/* Every NFS version must call this function with the init function
 * for its particular version.
 */
int
nfs_add_initer (struct list_head *list, nfs_version_initer_t init)
{
        struct nfs_initer_list  *new = NULL;
        if ((!list) || (!init))
                return -1;

        new = GF_CALLOC (1, sizeof (*new), gf_nfs_mt_nfs_initer_list);
        if (!new) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Memory allocation failed");
                return -1;
        }

        new->init = init;
        list_add_tail (&new->list, list);
        return 0;
}


int
nfs_deinit_versions (struct list_head *versions, xlator_t *this)
{
        struct nfs_initer_list          *version = NULL;
        struct nfs_initer_list          *tmp = NULL;
        struct nfs_state                *nfs = NULL;

        if ((!versions) || (!this))
                return -1;

        nfs = (struct nfs_state *)this->private;
        list_for_each_entry_safe (version, tmp, versions, list) {
                /* TODO: Add version specific destructor.
                 * if (!version->deinit)
                        goto err;

                   version->deinit (this);
                */
                if (version->program)
                        rpcsvc_program_unregister (nfs->rpcsvc,
                                                   (version->program));

                list_del (&version->list);
                GF_FREE (version);
        }

        return 0;
}

int
nfs_init_versions (struct nfs_state *nfs, xlator_t *this)
{
        struct nfs_initer_list          *version = NULL;
        struct nfs_initer_list          *tmp = NULL;
        rpcsvc_program_t                *prog = NULL;
        int                             ret = -1;
        struct list_head                *versions = NULL;

        if ((!nfs) || (!this))
                return -1;

        gf_log (GF_NFS, GF_LOG_DEBUG, "Initing protocol versions");
        versions = &nfs->versions;
        list_for_each_entry_safe (version, tmp, versions, list) {
                if (!version->init) {
                        ret = -1;
                        goto err;
                }

                prog = version->init (this);
                if (!prog) {
                        ret = -1;
                        goto err;
                }
//                prog->actorxl = this;
                version->program = prog;
                if (nfs->override_portnum)
                        prog->progport = nfs->override_portnum;
                gf_log (GF_NFS, GF_LOG_DEBUG, "Starting program: %s",
                        prog->progname);

                ret = rpcsvc_program_register (nfs->rpcsvc, prog);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Program init failed");
                        goto err;
                }
                if (rpcsvc_register_portmap_enabled(nfs->rpcsvc)) {
                        ret = rpcsvc_program_register_portmap (prog,
                                                               prog->progport);
                        if (ret == -1) {
                                gf_log (GF_NFS, GF_LOG_ERROR, "Program registration failed");
                                goto err;
                        }
                }
        }

        ret = 0;
err:
        return ret;
}


int
nfs_add_all_initiators (struct nfs_state *nfs)
{
        int     ret = 0;

        /* Add the initializers for all versions. */
        ret = nfs_add_initer (&nfs->versions, mnt3svc_init);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add protocol"
                        " initializer");
                goto ret;
        }

        ret = nfs_add_initer (&nfs->versions, mnt1svc_init);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add protocol"
                        " initializer");
                goto ret;
        }

        ret = nfs_add_initer (&nfs->versions, nfs3svc_init);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add protocol"
                        " initializer");
                goto ret;
        }

        if (nfs->enable_nlm == _gf_true) {
                ret = nfs_add_initer (&nfs->versions, nlm4svc_init);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add protocol"
                                " initializer");
                        goto ret;
                }
        }

        if (nfs->enable_acl == _gf_true) {
                ret = nfs_add_initer (&nfs->versions, acl3svc_init);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add "
                                "ACL protocol initializer");
                        goto ret;
                }
        }

        ret = 0;
ret:
        return ret;
}


int
nfs_subvolume_started (struct nfs_state *nfs, xlator_t *xl)
{
        int     x = 0;
        int     started = 0;

        if ((!nfs) || (!xl))
                return 1;

        LOCK (&nfs->svinitlock);
        {
                for (;x < nfs->allsubvols; ++x) {
                        if (nfs->initedxl[x] == xl) {
                                started = 1;
                                goto unlock;
                       }
               }
        }
unlock:
        UNLOCK (&nfs->svinitlock);

        return started;
}


int
nfs_subvolume_set_started (struct nfs_state *nfs, xlator_t *xl)
{
        int     x = 0;

        if ((!nfs) || (!xl))
                return 1;

        LOCK (&nfs->svinitlock);
        {
                for (;x < nfs->allsubvols; ++x) {
                        if (nfs->initedxl[x] == xl) {
                                gf_log (GF_NFS, GF_LOG_DEBUG,
                                        "Volume already started %s",
                                        xl->name);
                                break;
                        }

                        if (nfs->initedxl[x] == NULL) {
                                nfs->initedxl[x] = xl;
                                ++nfs->upsubvols;
                                gf_log (GF_NFS, GF_LOG_DEBUG, "Starting up: %s "
                                        ", vols started till now: %d", xl->name,
                                        nfs->upsubvols);
                                goto unlock;
                        }
               }
        }
unlock:
        UNLOCK (&nfs->svinitlock);

        return 0;
}


int32_t
nfs_start_subvol_lookup_cbk (call_frame_t *frame, void *cookie,
                             xlator_t *this, int32_t op_ret, int32_t op_errno,
                             inode_t *inode, struct iatt *buf, dict_t *xattr,
                             struct iatt *postparent)
{
        if (op_ret == -1) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to lookup root: %s",
                        strerror (op_errno));
                goto err;
        }

        nfs_subvolume_set_started (this->private, ((xlator_t *)cookie));
        gf_log (GF_NFS, GF_LOG_TRACE, "Started %s", ((xlator_t *)cookie)->name);
err:
        return 0;
}


int
nfs_startup_subvolume (xlator_t *nfsx, xlator_t *xl)
{
        int             ret = -1;
        loc_t           rootloc = {0, };
        nfs_user_t      nfu = {0, };

        if ((!nfsx) || (!xl))
                return -1;

        if (nfs_subvolume_started (nfsx->private, xl)) {
                gf_log (GF_NFS,GF_LOG_TRACE, "Subvolume already started: %s",
                        xl->name);
                ret = 0;
                goto err;
        }

        ret = nfs_root_loc_fill (xl->itable, &rootloc);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init root loc");
                goto err;
        }

        nfs_user_root_create (&nfu);
        ret = nfs_fop_lookup (nfsx, xl, &nfu, &rootloc,
                              nfs_start_subvol_lookup_cbk,
                              (void *)nfsx->private);
        if (ret < 0) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to lookup root: %s",
                        strerror (-ret));
                goto err;
        }

        nfs_loc_wipe (&rootloc);

err:
        return ret;
}

int
nfs_startup_subvolumes (xlator_t *nfsx)
{
        int                     ret = -1;
        xlator_list_t           *cl = NULL;
        struct nfs_state        *nfs = NULL;

        if (!nfsx)
                return -1;

        nfs = nfsx->private;
        cl = nfs->subvols;
        while (cl) {
                gf_log (GF_NFS, GF_LOG_DEBUG, "Starting subvolume: %s",
                        cl->xlator->name);
                ret = nfs_startup_subvolume (nfsx, cl->xlator);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to start-up "
                                "xlator: %s", cl->xlator->name);
                        goto err;
                }
                cl = cl->next;
        }

        ret = 0;
err:
        return ret;
}


int
nfs_init_subvolume (struct nfs_state *nfs, xlator_t *xl)
{
        unsigned int    lrusize = 0;
        int             ret = -1;

        if ((!nfs) || (!xl))
                return -1;

        lrusize = nfs->memfactor * GF_NFS_INODE_LRU_MULT;
        xl->itable = inode_table_new (lrusize, xl);
        if (!xl->itable) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to allocate "
                        "inode table");
                goto err;
        }
        ret = 0;
err:
        return ret;
}

int
nfs_init_subvolumes (struct nfs_state *nfs, xlator_list_t *cl)
{
        int             ret = -1;
        unsigned int    lrusize = 0;
        int             svcount = 0;

        if ((!nfs) || (!cl))
                return -1;

        lrusize = nfs->memfactor * GF_NFS_INODE_LRU_MULT;
        nfs->subvols = cl;
        gf_log (GF_NFS, GF_LOG_TRACE, "inode table lru: %d", lrusize);

        while (cl) {
                gf_log (GF_NFS, GF_LOG_DEBUG, "Initing subvolume: %s",
                        cl->xlator->name);
                ret = nfs_init_subvolume (nfs, cl->xlator);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init "
                                "xlator: %s", cl->xlator->name);
                        goto err;
                }
                ++svcount;
                cl = cl->next;
        }

        LOCK_INIT (&nfs->svinitlock);
        nfs->initedxl = GF_CALLOC (svcount, sizeof (xlator_t *),
                                   gf_nfs_mt_xlator_t );
        if (!nfs->initedxl) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to allocated inited xls");
                ret = -1;
                goto err;
        }

        gf_log (GF_NFS, GF_LOG_TRACE, "Inited volumes: %d", svcount);
        nfs->allsubvols = svcount;
        ret = 0;
err:
        return ret;
}


int
nfs_user_root_create (nfs_user_t *newnfu)
{
        if (!newnfu)
                return -1;

        newnfu->uid = 0;
        newnfu->gids[0] = 0;
        newnfu->ngrps = 1;

        return 0;
}


int
nfs_user_create (nfs_user_t *newnfu, uid_t uid, gid_t gid, gid_t *auxgids,
                 int auxcount)
{
        int     x = 1;
        int     y = 0;

        /* We test for GF_REQUEST_MAXGROUPS instead of  NFS_FOP_NGROUPS because
         * the latter accounts for the @gid being in @auxgids, which is not the
         * case here.
         */
        if ((!newnfu) || (auxcount > GF_REQUEST_MAXGROUPS))
                return -1;

        newnfu->uid = uid;
        newnfu->gids[0] = gid;
        newnfu->ngrps = 1;

        gf_log (GF_NFS, GF_LOG_TRACE, "uid: %d, gid %d, gids: %d", uid, gid,
                auxcount);

        if (!auxgids)
                return 0;

        for (; y < auxcount; ++x,++y) {
                newnfu->gids[x] = auxgids[y];
                ++newnfu->ngrps;
                gf_log (GF_NFS, GF_LOG_TRACE, "gid: %d", auxgids[y]);
        }

        return 0;
}


void
nfs_request_user_init (nfs_user_t *nfu, rpcsvc_request_t *req)
{
        gid_t           *gidarr = NULL;
        int             gids = 0;

        if ((!req) || (!nfu))
                return;

        gidarr = rpcsvc_auth_unix_auxgids (req, &gids);
        nfs_user_create (nfu, rpcsvc_request_uid (req),
                         rpcsvc_request_gid (req), gidarr, gids);

        return;
}

void
nfs_request_primary_user_init (nfs_user_t *nfu, rpcsvc_request_t *req,
                               uid_t uid, gid_t gid)
{
        gid_t           *gidarr = NULL;
        int             gids = 0;

        if ((!req) || (!nfu))
                return;

        gidarr = rpcsvc_auth_unix_auxgids (req, &gids);
        nfs_user_create (nfu, uid, gid, gidarr, gids);

        return;
}


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

        if (!this)
                return ret;

        ret = xlator_mem_acct_init (this, gf_nfs_mt_end + 1);

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

        return ret;
}


struct nfs_state *
nfs_init_state (xlator_t *this)
{
        struct nfs_state        *nfs = NULL;
        int                     ret = -1;
        unsigned int            fopspoolsize = 0;
        char                    *optstr = NULL;
        gf_boolean_t            boolt = _gf_false;
        struct stat             stbuf = {0,};

        if (!this)
                return NULL;

        if (!this->children) {
                gf_log (GF_NFS, GF_LOG_INFO,
                        "NFS is manually disabled: Exiting");
                /* Nothing for nfs process to do, exit cleanly */
                kill (getpid (), SIGTERM);
        }

        nfs = GF_CALLOC (1, sizeof (*nfs), gf_nfs_mt_nfs_state);
        if (!nfs) {
                gf_log (GF_NFS, GF_LOG_ERROR, "memory allocation failed");
                return NULL;
        }

        nfs->memfactor = GF_NFS_DEFAULT_MEMFACTOR;
        if (dict_get (this->options, "nfs.mem-factor")) {
                ret = dict_get_str (this->options, "nfs.mem-factor",
                                    &optstr);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_rpcsvc;
                }

                ret = gf_string2uint (optstr, &nfs->memfactor);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse uint "
                                "string");
                        goto free_rpcsvc;
                }
        }

        fopspoolsize = nfs->memfactor * GF_NFS_CONCURRENT_OPS_MULT;
        /* FIXME: Really saddens me to see this as xlator wide. */
        nfs->foppool = mem_pool_new (struct nfs_fop_local, fopspoolsize);
        if (!nfs->foppool) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to allocate fops "
                        "local pool");
                goto free_rpcsvc;
        }

        nfs->dynamicvolumes = GF_NFS_DVM_OFF;
        if (dict_get (this->options, "nfs.dynamic-volumes")) {
                ret = dict_get_str (this->options, "nfs.dynamic-volumes",
                                    &optstr);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_foppool;
                }

                ret = gf_string2boolean (optstr, &boolt);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse bool "
                                "string");
                        goto free_foppool;
                }

                if (boolt == _gf_true)
                        nfs->dynamicvolumes = GF_NFS_DVM_ON;
        }

        nfs->enable_nlm = _gf_true;
        if (!dict_get_str (this->options, "nfs.nlm", &optstr)) {

                ret = gf_string2boolean (optstr, &boolt);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse"
                                " bool string");
                        goto free_foppool;
                }

                if (boolt == _gf_false) {
                        gf_log (GF_NFS, GF_LOG_INFO, "NLM is manually disabled");
                        nfs->enable_nlm = _gf_false;
                }
        }

        nfs->enable_acl = _gf_true;
        ret = dict_get_str_boolean (this->options, "nfs.acl", _gf_true);
        if (ret == _gf_false) {
                gf_log (GF_NFS, GF_LOG_INFO, "ACL is manually disabled");
                nfs->enable_acl = _gf_false;
        }

        nfs->enable_ino32 = 0;
        if (dict_get (this->options, "nfs.enable-ino32")) {
                ret = dict_get_str (this->options, "nfs.enable-ino32",
                                    &optstr);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_foppool;
                }

                ret = gf_string2boolean (optstr, &boolt);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse bool "
                                "string");
                        goto free_foppool;
                }

                if (boolt == _gf_true)
                        nfs->enable_ino32 = 1;
        }

        if (dict_get (this->options, "nfs.port")) {
                ret = dict_get_str (this->options, "nfs.port",
                                    &optstr);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_foppool;
                }

                ret = gf_string2uint (optstr, &nfs->override_portnum);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse uint "
                                "string");
                        goto free_foppool;
                }
        }

        if (dict_get(this->options, "transport.socket.listen-port") == NULL) {
                if (nfs->override_portnum)
                        ret = gf_asprintf (&optstr, "%d",
                                           nfs->override_portnum);
                else
                        ret = gf_asprintf (&optstr, "%d", GF_NFS3_PORT);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "failed mem-allocation");
                        goto free_foppool;
                }
                ret = dict_set_dynstr (this->options,
                                       "transport.socket.listen-port", optstr);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "dict_set_dynstr error");
                        goto free_foppool;
                }
        }

        if (dict_get(this->options, "transport-type") == NULL) {
                ret = dict_set_str (this->options, "transport-type", "socket");
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "dict_set_str error");
                        goto free_foppool;
                }
        }

        nfs->mount_udp = 0;
        if (dict_get(this->options, "nfs.mount-udp")) {
                ret = dict_get_str (this->options, "nfs.mount-udp", &optstr);
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_foppool;
                }

                ret = gf_string2boolean (optstr, &boolt);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse bool "
                                "string");
                        goto free_foppool;
                }

                if (boolt == _gf_true)
                        nfs->mount_udp = 1;
        }

        /* support both options rpc-auth.ports.insecure and
         * rpc-auth-allow-insecure for backward compatibility
         */
        nfs->allow_insecure = 1;
        if (dict_get(this->options, "rpc-auth.ports.insecure")) {
                ret = dict_get_str (this->options, "rpc-auth.ports.insecure",
                                    &optstr);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_foppool;
                }

                ret = gf_string2boolean (optstr, &boolt);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse bool "
                                "string");
                        goto free_foppool;
                }

                if (boolt == _gf_false)
                        nfs->allow_insecure = 0;
        }

        if (dict_get(this->options, "rpc-auth-allow-insecure")) {
                ret = dict_get_str (this->options, "rpc-auth-allow-insecure",
                                    &optstr);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
                        goto free_foppool;
                }

                ret = gf_string2boolean (optstr, &boolt);
                if (ret < 0) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse bool "
                                "string");
                        goto free_foppool;
                }

                if (boolt == _gf_false)
                        nfs->allow_insecure = 0;
        }

        if (nfs->allow_insecure) {
                /* blindly set both the options */
                dict_del (this->options, "rpc-auth-allow-insecure");
                ret = dict_set_str (this->options,
                                    "rpc-auth-allow-insecure", "on");
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "dict_set_str error");
                        goto free_foppool;
                }
                dict_del (this->options, "rpc-auth.ports.insecure");
                ret = dict_set_str (this->options,
                                    "rpc-auth.ports.insecure", "on");
                if (ret == -1) {
                        gf_log (GF_NFS, GF_LOG_ERROR, "dict_set_str error");
                        goto free_foppool;
                }
        }

        GF_OPTION_INIT (OPT_SERVER_AUX_GIDS, nfs->server_aux_gids,
                        bool, free_foppool);
        GF_OPTION_INIT (OPT_SERVER_GID_CACHE_TIMEOUT, nfs->server_aux_gids_max_age,
                        uint32, free_foppool);

        if (gid_cache_init(&nfs->gid_cache, nfs->server_aux_gids_max_age) < 0) {
                gf_log(GF_NFS, GF_LOG_ERROR, "Failed to initialize group cache.");
                goto free_foppool;
        }

        if (stat("/sbin/rpc.statd", &stbuf) == -1) {
                gf_log (GF_NFS, GF_LOG_WARNING, "/sbin/rpc.statd not found. "
                        "Disabling NLM");
                nfs->enable_nlm = _gf_false;
        }

        nfs->rpcsvc =  rpcsvc_init (this, this->ctx, this->options, 0);
        if (!nfs->rpcsvc) {
                ret = -1;
                gf_log (GF_NFS, GF_LOG_ERROR, "RPC service init failed");
                goto free_foppool;
        }

        this->private = (void *)nfs;
        INIT_LIST_HEAD (&nfs->versions);
        nfs->generation = 1965;

        ret = 0;

free_foppool:
        if (ret < 0)
                mem_pool_destroy (nfs->foppool);

free_rpcsvc:
        /*
         * rpcsvc_deinit */
        if (ret < 0) {
                GF_FREE (nfs);
                nfs = NULL;
        }

        return nfs;
}

int
nfs_drc_init (xlator_t *this)
{
        int       ret     = -1;
        rpcsvc_t *svc     = NULL;

        svc = ((struct nfs_state *)(this->private))->rpcsvc;
        if (!svc)
                goto out;

        ret = rpcsvc_drc_init (svc, this->options);

 out:
        return ret;
}

int
init (xlator_t *this) {

        struct nfs_state        *nfs = NULL;
        int                     ret = -1;

        if (!this)
                return -1;

        nfs = nfs_init_state (this);
        if (!nfs) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to init nfs option");
                return -1;
        }

        ret = nfs_add_all_initiators (nfs);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add initiators");
                goto err;
        }

        ret = nfs_init_subvolumes (nfs, this->children);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init NFS "
                        "exports");
                goto err;
        }

        ret = mount_init_state (this);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init Mount"
                        "state");
                goto err;
        }

        ret = nlm4_init_state (this);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init NLM"
                        "state");
                goto err;
        }

        ret = nfs_init_versions (nfs, this);
        if (ret == -1) {
                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to initialize "
                        "protocols");
                /* Do not return an error on this. If we dont return
                 * an error, the process keeps running and it helps
                 * to point out where the log is by doing ps ax|grep gluster.
                 */
                ret = 0;
                goto err;
        }

        ret = nfs_drc_init (this);
        if (ret == 0)
                gf_log (GF_NFS, GF_LOG_INFO, "NFS service started");
err:

        return ret;
}


int
notify (xlator_t *this, int32_t event, void *data, ...)
{
        xlator_t                *subvol = NULL;
        struct nfs_state        *priv   = NULL;

        subvol = (xlator_t *)data;

        gf_log (GF_NFS, GF_LOG_TRACE, "Notification received: %d",
                event);

        switch (event) {
        case GF_EVENT_CHILD_UP:
                nfs_startup_subvolume (this, subvol);
                break;

        case GF_EVENT_CHILD_MODIFIED:
                priv = this->private;
                ++(priv->generation);
                break;

        case GF_EVENT_PARENT_UP:
                default_notify (this, GF_EVENT_PARENT_UP, data);
                break;
        }

        return 0;
}


int
fini (xlator_t *this)
{

        struct nfs_state        *nfs = NULL;

        nfs = (struct nfs_state *)this->private;
        gf_log (GF_NFS, GF_LOG_DEBUG, "NFS service going down");
        nfs_deinit_versions (&nfs->versions, this);
        return 0;
}

int32_t
nfs_forget (xlator_t *this, inode_t *inode)
{
        uint64_t                 ctx    = 0;
        struct nfs_inode_ctx    *ictx   = NULL;

        if (inode_ctx_del (inode, this, &ctx))
                return -1;

        ictx = (struct nfs_inode_ctx *)ctx;
        GF_FREE (ictx);

        return 0;
}

gf_boolean_t
_nfs_export_is_for_vol (char *exname, char *volname)
{
        gf_boolean_t    ret = _gf_false;
        char            *tmp = NULL;

        tmp = exname;
        if (tmp[0] == '/')
                tmp++;

        if (!strcmp (tmp, volname))
                ret = _gf_true;

        return ret;
}

int
nfs_priv_to_dict (xlator_t *this, dict_t *dict)
{
        int                     ret = -1;
        struct nfs_state        *priv = NULL;
        struct mountentry       *mentry = NULL;
        char                    *volname = NULL;
        char                    key[1024] = {0,};
        int                     count = 0;

        GF_VALIDATE_OR_GOTO (THIS->name, this, out);
        GF_VALIDATE_OR_GOTO (THIS->name, dict, out);

        priv = this->private;
        GF_ASSERT (priv);

        ret = dict_get_str (dict, "volname", &volname);
        if (ret) {
                gf_log (this->name, GF_LOG_ERROR, "Could not get volname");
                goto out;
        }

        list_for_each_entry (mentry, &priv->mstate->mountlist, mlist) {
                if (!_nfs_export_is_for_vol (mentry->exname, volname))
                        continue;

                memset (key, 0, sizeof (key));
                snprintf (key, sizeof (key), "client%d.hostname", count);
                ret = dict_set_str (dict, key, mentry->hostname);
                if (ret) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "Error writing hostname to dict");
                        goto out;
                }

                /* No connection data available yet in nfs server.
                 * Hence, setting to 0 to prevent cli failing
                 */
                memset (key, 0, sizeof (key));
                snprintf (key, sizeof (key), "client%d.bytesread", count);
                ret = dict_set_uint64 (dict, key, 0);
                if (ret) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "Error writing bytes read to dict");
                        goto out;
                }

                memset (key, 0, sizeof (key));
                snprintf (key, sizeof (key), "client%d.byteswrite", count);
                ret = dict_set_uint64 (dict, key, 0);
                if (ret) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "Error writing bytes write to dict");
                        goto out;
                }

                count++;
        }

        ret = dict_set_int32 (dict, "clientcount", count);
        if (ret)
                gf_log (this->name, GF_LOG_ERROR,
                        "Error writing client count to dict");

out:
        gf_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
        return ret;
}

extern int32_t
nlm_priv (xlator_t *this);

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

        /* DRC needs the global drc structure, xl is of no use to it. */
        ret = rpcsvc_drc_priv (((struct nfs_state *)(this->private))->rpcsvc->drc);
        if (ret) {
                gf_log (this->name, GF_LOG_DEBUG, "Statedump of DRC failed");
                goto out;
        }

        ret = nlm_priv (this);
        if (ret) {
                gf_log (this->name, GF_LOG_DEBUG, "Statedump of NLM failed");
                goto out;
        }
 out:
        return ret;
}


struct xlator_cbks cbks = {
        .forget      = nfs_forget,
};

struct xlator_fops fops;

struct xlator_dumpops dumpops = {
        .priv           = nfs_priv,
        .priv_to_dict   = nfs_priv_to_dict,
};

/* TODO: If needed, per-volume options below can be extended to be export
+ * specific also because after export-dir is introduced, a volume is not
+ * neccessarily an export whereas different subdirectories within that volume
+ * can be and may need these options to be specified separately.
+ */
struct volume_options options[] = {
        { .key  = {"nfs3.read-size"},
          .type = GF_OPTION_TYPE_SIZET,
          .default_value = TOSTRING(GF_NFS3_RTPREF),
          .description = "Size in which the client should issue read requests"
                         " to the Gluster NFSv3 server. Must be a multiple of"
                         " 4KB."
        },
        { .key  = {"nfs3.write-size"},
          .type = GF_OPTION_TYPE_SIZET,
          .default_value = TOSTRING(GF_NFS3_WTPREF),
          .description = "Size in which the client should issue write requests"
                         " to the Gluster NFSv3 server. Must be a multiple of"
                         " 4KB."
        },
        { .key  = {"nfs3.readdir-size"},
          .type = GF_OPTION_TYPE_SIZET,
          .default_value = TOSTRING(GF_NFS3_DTPREF),
          .description = "Size in which the client should issue directory "
                         " reading requests."
        },
        { .key  = {"nfs3.*.volume-access"},
          .type = GF_OPTION_TYPE_STR,
          .value = {"read-only", "read-write"},
          .default_value = "read-write",
          .description = "Type of access desired for this subvolume: "
                         " read-only, read-write(default)"
        },
        { .key  = {"nfs3.*.trusted-write"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "On an UNSTABLE write from client, return STABLE flag"
                         " to force client to not send a COMMIT request. In "
                         "some environments, combined with a replicated "
                         "GlusterFS setup, this option can improve write "
                         "performance. This flag allows user to trust Gluster"
                         " replication logic to sync data to the disks and "
                         "recover when required. COMMIT requests if received "
                         "will be handled in a default manner by fsyncing."
                         " STABLE writes are still handled in a sync manner. "
                         "Off by default."

        },
        { .key  = {"nfs3.*.trusted-sync"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "All writes and COMMIT requests are treated as async."
                         " This implies that no write requests are guaranteed"
                         " to be on server disks when the write reply is "
                         "received at the NFS client. Trusted sync includes "
                         " trusted-write behaviour. Off by default."

        },
        { .key  = {"nfs3.*.export-dir"},
          .type = GF_OPTION_TYPE_PATH,
          .default_value = "",
          .description = "By default, all subvolumes of nfs are exported as "
                         "individual exports. There are cases where a "
                         "subdirectory or subdirectories in the volume need to "
                         "be exported separately. This option can also be used "
                         "in conjunction with nfs3.export-volumes option to "
                         "restrict exports only to the subdirectories specified"
                         " through this option. Must be an absolute path."
        },
        { .key  = {"nfs3.export-dirs"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "By default, all subvolumes of nfs are exported as "
                         "individual exports. There are cases where a "
                         "subdirectory or subdirectories in the volume need to "
                         "be exported separately. Enabling this option allows "
                         "any directory on a volumes to be exported separately."
                         "Directory exports are enabled by default."
        },
        { .key  = {"nfs3.export-volumes"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Enable or disable exporting whole volumes, instead "
                         "if used in conjunction with nfs3.export-dir, can "
                         "allow setting up only subdirectories as exports. On "
                         "by default."
        },
        { .key  = {"rpc-auth.auth-unix"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Disable or enable the AUTH_UNIX authentication type."
                         "Must always be enabled for better interoperability."
                         "However, can be disabled if needed. Enabled by"
                         "default"
        },
        { .key  = {"rpc-auth.auth-null"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Disable or enable the AUTH_NULL authentication type."
                         "Must always be enabled. This option is here only to"
                         " avoid unrecognized option warnings"
        },
        { .key  = {"rpc-auth.auth-unix.*"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Disable or enable the AUTH_UNIX authentication type "
                         "for a particular exported volume overriding defaults"
                         " and general setting for AUTH_UNIX scheme. Must "
                         "always be enabled for better interoperability."
                         "However, can be disabled if needed. Enabled by"
                         "default."
        },
        { .key  = {"rpc-auth.auth-unix.*.allow"},
          .type = GF_OPTION_TYPE_STR,
          .default_value = "on",
          .description = "Disable or enable the AUTH_UNIX authentication type "
                         "for a particular exported volume overriding defaults"
                         " and general setting for AUTH_UNIX scheme. Must "
                         "always be enabled for better interoperability."
                         "However, can be disabled if needed. Enabled by"
                         "default."
        },
        { .key  = {"rpc-auth.auth-null.*"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "Disable or enable the AUTH_NULL authentication type "
                         "for a particular exported volume overriding defaults"
                         " and general setting for AUTH_NULL. Must always be "
                         "enabled. This option is here only to avoid "
                         "unrecognized option warnings."
        },
        { .key  = {"rpc-auth.addr.allow"},
          .type = GF_OPTION_TYPE_INTERNET_ADDRESS_LIST,
          .default_value = "all",
          .description = "Allow a comma separated list of addresses and/or"
                         " hostnames to connect to the server. By default, all"
                         " connections are allowed. This allows users to "
                         "define a general rule for all exported volumes."
        },
        { .key  = {"rpc-auth.addr.reject"},
          .type = GF_OPTION_TYPE_INTERNET_ADDRESS_LIST,
          .default_value = "none",
          .description = "Reject a comma separated list of addresses and/or"
                         " hostnames from connecting to the server. By default,"
                         " all connections are allowed. This allows users to"
                         "define a general rule for all exported volumes."
        },
        { .key  = {"rpc-auth.addr.*.allow"},
          .type = GF_OPTION_TYPE_INTERNET_ADDRESS_LIST,
          .default_value = "all",
          .description = "Allow a comma separated list of addresses and/or"
                         " hostnames to connect to the server. By default, all"
                         " connections are allowed. This allows users to "
                         "define a rule for a specific exported volume."
        },
        { .key  = {"rpc-auth.addr.*.reject"},
          .type = GF_OPTION_TYPE_INTERNET_ADDRESS_LIST,
          .default_value = "none",
          .description = "Reject a comma separated list of addresses and/or"
                         " hostnames from connecting to the server. By default,"
                         " all connections are allowed. This allows users to"
                         "define a rule for a specific exported volume."
        },
        { .key  = {"rpc-auth.ports.insecure"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Allow client connections from unprivileged ports. By "
                         "default only privileged ports are allowed. This is a"
                         "global setting in case insecure ports are to be "
                         "enabled for all exports using a single option."
        },
        { .key  = {"rpc-auth.ports.*.insecure"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Allow client connections from unprivileged ports. By "
                         "default only privileged ports are allowed. Use this"
                         " option to enable or disable insecure ports for "
                         "a specific subvolume and to override the global "
                         "setting set by the previous option."
        },
        { .key  = {"rpc-auth.addr.namelookup"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Users have the option of turning on name lookup for"
                  " incoming client connections using this option. Use this "
                  "option to turn on name lookups during address-based "
                  "authentication. Turning this on will enable you to"
                  " use hostnames in nfs.rpc-auth-* filters. In some "
                  "setups, the name server can take too long to reply to DNS "
                  "queries resulting in timeouts of mount requests. By "
                  "default, name lookup is off"
        },
        { .key  = {"nfs.dynamic-volumes"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Internal option set to tell gnfs to use a different"
                         " scheme for encoding file handles when DVM is being"
                         " used."
        },
        { .key  = {"nfs3.*.volume-id"},
          .type = GF_OPTION_TYPE_STR,
          .default_value = "",
          .description = "When nfs.dynamic-volumes is set, gnfs expects every "
                         "subvolume to have this option set for it, so that "
                         "gnfs can use this option to identify the volume. "
                         "If all subvolumes do not have this option set, an "
                         "error is reported."
        },
        { .key  = {"nfs.enable-ino32"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "no",
          .description = "For nfs clients or apps that do not support 64-bit "
                         "inode numbers, use this option to make NFS return "
                         "32-bit inode numbers instead. Disabled by default, so"
                         " NFS returns 64-bit inode numbers."
        },
        { .key  = {"rpc.register-with-portmap"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "For systems that need to run multiple nfs servers, "
                         "only one registration is possible with "
                         "portmap service. Use this option to turn off portmap "
                         "registration for Gluster NFS. On by default"
        },
        { .key  = {"nfs.port"},
          .type = GF_OPTION_TYPE_INT,
          .min  = 1,
          .max  = 0xffff,
          .default_value = TOSTRING(GF_NFS3_PORT),
          .description = "Use this option on systems that need Gluster NFS to "
                         "be associated with a non-default port number."
        },
        { .key  = {"nfs.mem-factor"},
          .type = GF_OPTION_TYPE_INT,
          .min  = 1,
          .max  = 1024,
          .default_value = TOSTRING(GF_NFS_DEFAULT_MEMFACTOR),
          .description = "Use this option to make NFS be faster on systems by "
                         "using more memory. This option specifies a multiple "
                         "that determines the total amount of memory used. "
                         "Default value is 15. Increase to use more memory in "
                         "order to improve performance for certain use cases."
                         "Please consult gluster-users list before using this "
                         "option."
        },
        { .key  = {"nfs.*.disable"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "false",
          .description = "This option is used to start or stop NFS server"
                         "for individual volume."
        },

        { .key  = {"nfs.nlm"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "This option, if set to 'off', disables NLM server "
                         "by not registering the service with the portmapper."
                         " Set it to 'on' to re-enable it. Default value: 'on'"
        },

        { .key = {"nfs.mount-udp"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "set the option to 'on' to enable mountd on UDP. "
                         "Required for some Solaris and AIX NFS clients. "
                         "The need for enabling this option often depends "
                         "on the usage of NLM."
        },
        { .key = {OPT_SERVER_AUX_GIDS},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "off",
          .description = "Let the server look up which groups a user belongs "
                         "to, overwriting the list passed from the client. "
                         "This enables support for group lists longer than "
                         "can be passed through the NFS protocol, but is not "
                         "secure unless users and groups are well synchronized "
                         "between clients and servers."
        },
        { .key = {OPT_SERVER_GID_CACHE_TIMEOUT},
          .type = GF_OPTION_TYPE_INT,
          .min = 0,
          .max = 3600,
          .default_value = "5",
          .description = "Number of seconds to cache auxiliary-GID data, when "
                         OPT_SERVER_AUX_GIDS " is set."
        },
        { .key = {"nfs.acl"},
          .type = GF_OPTION_TYPE_BOOL,
          .default_value = "on",
          .description = "This option is used to control ACL support for NFS."
        },
        { .key  = {"nfs.drc"},
          .type = GF_OPTION_TYPE_STR,
          .default_value = "off",
          .description = "Enable Duplicate Request Cache in gNfs server to "
                         "improve correctness of non-idempotent operations like "
                         "write, delete, link, et al"
        },
        { .key  = {"nfs.drc-size"},
          .type = GF_OPTION_TYPE_INT,
          .default_value = "0x20000",
          .description = "Sets the number of non-idempotent "
                         "requests to cache in drc"
        },
        { .key  = {NULL} },
};