summaryrefslogtreecommitdiffstats
path: root/libglusterfs/src/protocol.h
blob: 8faf5f3ab8ac47c496eb9a08c5c2d8bc2af449bf (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
/*
  Copyright (c) 2006-2009 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/>.
*/

#ifndef _PROTOCOL_H
#define _PROTOCOL_H

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

#include <inttypes.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <unistd.h>
#include <fcntl.h>

#include "byte-order.h"

/* Any changes in the protocol structure or adding new '[f,m]ops' needs to 
 * bump the protocol version by "0.1" 
 */

#define GF_PROTOCOL_VERSION "2.1"

struct gf_stat {
	uint64_t ino;
	uint64_t size;
	uint64_t blocks;
	uint64_t dev;
	uint32_t rdev;
	uint32_t mode;
	uint32_t nlink;
	uint32_t uid;
	uint32_t gid;
	uint32_t blksize;
	uint32_t atime;
	uint32_t atime_nsec;
	uint32_t mtime ;
	uint32_t mtime_nsec;
	uint32_t ctime;
	uint32_t ctime_nsec;
} __attribute__((packed));


static inline void
gf_stat_to_stat (struct gf_stat *gf_stat, struct stat *stat)
{
	stat->st_dev          = ntoh64 (gf_stat->dev);
	stat->st_ino          = ntoh64 (gf_stat->ino);
	stat->st_mode         = ntoh32 (gf_stat->mode);
	stat->st_nlink        = ntoh32 (gf_stat->nlink);
	stat->st_uid          = ntoh32 (gf_stat->uid);
	stat->st_gid          = ntoh32 (gf_stat->gid);
	stat->st_rdev         = ntoh32 (gf_stat->rdev);
	stat->st_size         = ntoh64 (gf_stat->size);
	stat->st_blksize      = ntoh32 (gf_stat->blksize);
	stat->st_blocks       = ntoh64 (gf_stat->blocks);
	stat->st_atime        = ntoh32 (gf_stat->atime);
	stat->st_mtime        = ntoh32 (gf_stat->mtime);
	stat->st_ctime        = ntoh32 (gf_stat->ctime);
	/* TODO: handle nsec */
}


static inline void
gf_stat_from_stat (struct gf_stat *gf_stat, struct stat *stat)
{
	gf_stat->dev         = hton64 (stat->st_dev);
	gf_stat->ino         = hton64 (stat->st_ino);
	gf_stat->mode        = hton32 (stat->st_mode);
	gf_stat->nlink       = hton32 (stat->st_nlink);
	gf_stat->uid         = hton32 (stat->st_uid);
	gf_stat->gid         = hton32 (stat->st_gid);
	gf_stat->rdev        = hton32 (stat->st_rdev);
	gf_stat->size        = hton64 (stat->st_size);
	gf_stat->blksize     = hton32 (stat->st_blksize);
	gf_stat->blocks      = hton64 (stat->st_blocks);
	gf_stat->atime       = hton32 (stat->st_atime);
	gf_stat->mtime       = hton32 (stat->st_mtime);
	gf_stat->ctime       = hton32 (stat->st_ctime);
	/* TODO: handle nsec */
}


struct gf_statfs {
	uint64_t bsize;
	uint64_t frsize;
	uint64_t blocks;
	uint64_t bfree;
	uint64_t bavail;
	uint64_t files;
	uint64_t ffree;
	uint64_t favail;
	uint64_t fsid;
	uint64_t flag;
	uint64_t namemax;
} __attribute__((packed));


static inline void
gf_statfs_to_statfs (struct gf_statfs *gf_stat, struct statvfs *stat)
{
	stat->f_bsize   = ntoh64 (gf_stat->bsize);
	stat->f_frsize  = ntoh64 (gf_stat->frsize);
	stat->f_blocks  = ntoh64 (gf_stat->blocks);
	stat->f_bfree   = ntoh64 (gf_stat->bfree);
	stat->f_bavail  = ntoh64 (gf_stat->bavail);
	stat->f_files   = ntoh64 (gf_stat->files);
	stat->f_ffree   = ntoh64 (gf_stat->ffree);
	stat->f_favail  = ntoh64 (gf_stat->favail);
	stat->f_fsid    = ntoh64 (gf_stat->fsid);
	stat->f_flag    = ntoh64 (gf_stat->flag);
	stat->f_namemax = ntoh64 (gf_stat->namemax);
}


static inline void
gf_statfs_from_statfs (struct gf_statfs *gf_stat, struct statvfs *stat)
{
	gf_stat->bsize   = hton64 (stat->f_bsize);
	gf_stat->frsize  = hton64 (stat->f_frsize);
	gf_stat->blocks  = hton64 (stat->f_blocks);
	gf_stat->bfree   = hton64 (stat->f_bfree);
	gf_stat->bavail  = hton64 (stat->f_bavail);
	gf_stat->files   = hton64 (stat->f_files);
	gf_stat->ffree   = hton64 (stat->f_ffree);
	gf_stat->favail  = hton64 (stat->f_favail);
	gf_stat->fsid    = hton64 (stat->f_fsid);
	gf_stat->flag    = hton64 (stat->f_flag);
	gf_stat->namemax = hton64 (stat->f_namemax);
}


struct gf_flock {
	uint16_t type;
	uint16_t whence;
	uint64_t start;
	uint64_t len;
	uint32_t pid;
} __attribute__((packed));


static inline void
gf_flock_to_flock (struct gf_flock *gf_flock, struct flock *flock)
{
	flock->l_type   = ntoh16 (gf_flock->type);
	flock->l_whence = ntoh16 (gf_flock->whence);
	flock->l_start  = ntoh64 (gf_flock->start);
	flock->l_len    = ntoh64 (gf_flock->len);
	flock->l_pid    = ntoh32 (gf_flock->pid);
}


static inline void
gf_flock_from_flock (struct gf_flock *gf_flock, struct flock *flock)
{
	gf_flock->type   = hton16 (flock->l_type);
	gf_flock->whence = hton16 (flock->l_whence);
	gf_flock->start  = hton64 (flock->l_start);
	gf_flock->len    = hton64 (flock->l_len);
	gf_flock->pid    = hton32 (flock->l_pid);
}


struct gf_timespec {
	uint32_t tv_sec;
	uint32_t tv_nsec;
} __attribute__((packed));


static inline void
gf_timespec_to_timespec (struct gf_timespec *gf_ts, struct timespec *ts)
{

	ts[0].tv_sec  = ntoh32 (gf_ts[0].tv_sec);
	ts[0].tv_nsec = ntoh32 (gf_ts[0].tv_nsec);
	ts[1].tv_sec  = ntoh32 (gf_ts[1].tv_sec);
	ts[1].tv_nsec = ntoh32 (gf_ts[1].tv_nsec);
}


static inline void
gf_timespec_from_timespec (struct gf_timespec *gf_ts, struct timespec *ts)
{
	gf_ts[0].tv_sec  = hton32 (ts[0].tv_sec);
	gf_ts[0].tv_nsec = hton32 (ts[0].tv_nsec);
	gf_ts[1].tv_sec  = hton32 (ts[1].tv_sec);
	gf_ts[1].tv_nsec = hton32 (ts[1].tv_nsec);
}


#define GF_O_ACCMODE           003
#define GF_O_RDONLY             00
#define GF_O_WRONLY             01
#define GF_O_RDWR               02
#define GF_O_CREAT            0100
#define GF_O_EXCL             0200
#define GF_O_NOCTTY           0400
#define GF_O_TRUNC           01000
#define GF_O_APPEND          02000
#define GF_O_NONBLOCK        04000
#define GF_O_SYNC           010000
#define GF_O_ASYNC          020000

#define GF_O_DIRECT         040000
#define GF_O_DIRECTORY     0200000
#define GF_O_NOFOLLOW      0400000
#define GF_O_NOATIME      01000000
#define GF_O_CLOEXEC      02000000

#define GF_O_LARGEFILE     0100000

#define XLATE_BIT(from, to, bit)    do {                \
                if (from & bit)                         \
                        to = to | GF_##bit;             \
        } while (0)

#define UNXLATE_BIT(from, to, bit)  do {                \
                if (from & GF_##bit)                    \
                        to = to | bit;                  \
        } while (0)

#define XLATE_ACCESSMODE(from, to) do {                 \
                switch (from & O_ACCMODE) {             \
                case O_RDONLY: to |= GF_O_RDONLY;       \
                        break;                          \
                case O_WRONLY: to |= GF_O_WRONLY;       \
                        break;                          \
                case O_RDWR: to |= GF_O_RDWR;           \
                        break;                          \
                }                                       \
        } while (0)

#define UNXLATE_ACCESSMODE(from, to) do {               \
                switch (from & GF_O_ACCMODE) {          \
                case GF_O_RDONLY: to |= O_RDONLY;       \
                        break;                          \
                case GF_O_WRONLY: to |= O_WRONLY;       \
                        break;                          \
                case GF_O_RDWR: to |= O_RDWR;           \
                        break;                          \
                }                                       \
        } while (0)

static inline uint32_t
gf_flags_from_flags (uint32_t flags)
{
        uint32_t gf_flags = 0;

        XLATE_ACCESSMODE (flags, gf_flags);

        XLATE_BIT (flags, gf_flags, O_CREAT);
        XLATE_BIT (flags, gf_flags, O_EXCL);
        XLATE_BIT (flags, gf_flags, O_NOCTTY);
        XLATE_BIT (flags, gf_flags, O_TRUNC);
        XLATE_BIT (flags, gf_flags, O_APPEND);
        XLATE_BIT (flags, gf_flags, O_NONBLOCK);
        XLATE_BIT (flags, gf_flags, O_SYNC);
        XLATE_BIT (flags, gf_flags, O_ASYNC);

        XLATE_BIT (flags, gf_flags, O_DIRECT);
        XLATE_BIT (flags, gf_flags, O_DIRECTORY);
        XLATE_BIT (flags, gf_flags, O_NOFOLLOW);
#ifdef O_NOATIME
        XLATE_BIT (flags, gf_flags, O_NOATIME);
#endif
#ifdef O_CLOEXEC
        XLATE_BIT (flags, gf_flags, O_CLOEXEC);
#endif
        XLATE_BIT (flags, gf_flags, O_LARGEFILE);

        return gf_flags;
}

static inline uint32_t
gf_flags_to_flags (uint32_t gf_flags)
{
        uint32_t flags = 0;

        UNXLATE_ACCESSMODE (gf_flags, flags);

        UNXLATE_BIT (gf_flags, flags, O_CREAT);
        UNXLATE_BIT (gf_flags, flags, O_EXCL);
        UNXLATE_BIT (gf_flags, flags, O_NOCTTY);
        UNXLATE_BIT (gf_flags, flags, O_TRUNC);
        UNXLATE_BIT (gf_flags, flags, O_APPEND);
        UNXLATE_BIT (gf_flags, flags, O_NONBLOCK);
        UNXLATE_BIT (gf_flags, flags, O_SYNC);
        UNXLATE_BIT (gf_flags, flags, O_ASYNC);

        UNXLATE_BIT (gf_flags, flags, O_DIRECT);
        UNXLATE_BIT (gf_flags, flags, O_DIRECTORY);
        UNXLATE_BIT (gf_flags, flags, O_NOFOLLOW);
#ifdef O_NOATIME
        UNXLATE_BIT (gf_flags, flags, O_NOATIME);
#endif
#ifdef O_CLOEXEC
        UNXLATE_BIT (gf_flags, flags, O_CLOEXEC);
#endif
        UNXLATE_BIT (gf_flags, flags, O_LARGEFILE);

        return flags;
}


typedef struct {
	uint64_t ino;
        uint64_t gen;
	char     path[0];     /* NULL terminated */
} __attribute__((packed)) gf_fop_stat_req_t;;
typedef struct {
	struct gf_stat stat;
} __attribute__((packed)) gf_fop_stat_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint32_t size;
	char     path[0];     /* NULL terminated */
} __attribute__((packed)) gf_fop_readlink_req_t;
typedef struct {
        struct gf_stat buf;
	char     path[0]; /* NULL terminated */
} __attribute__((packed)) gf_fop_readlink_rsp_t;


typedef struct {
	uint64_t par;
        uint64_t gen;
	uint64_t dev;
	uint32_t mode;
	char     path[0];     /* NULL terminated */
	char     bname[0]; /* NULL terminated */
} __attribute__((packed)) gf_fop_mknod_req_t;
typedef struct {
	struct gf_stat stat;
        struct gf_stat preparent;
        struct gf_stat postparent;
} __attribute__((packed)) gf_fop_mknod_rsp_t;


typedef struct {
	uint64_t par;
        uint64_t gen;
	uint32_t mode;
	char     path[0];     /* NULL terminated */
	char     bname[0]; /* NULL terminated */
} __attribute__((packed)) gf_fop_mkdir_req_t;
typedef struct {
	struct gf_stat stat;
        struct gf_stat preparent;
        struct gf_stat postparent;
} __attribute__((packed)) gf_fop_mkdir_rsp_t;


typedef struct {
	uint64_t par;
        uint64_t gen;
	char     path[0];     /* NULL terminated */
	char     bname[0]; /* NULL terminated */
} __attribute__((packed)) gf_fop_unlink_req_t;
typedef struct {
        struct gf_stat preparent;
        struct gf_stat postparent;
} __attribute__((packed)) gf_fop_unlink_rsp_t;


typedef struct {
	uint64_t par;
        uint64_t gen;
	char     path[0];
	char     bname[0]; /* NULL terminated */
} __attribute__((packed)) gf_fop_rmdir_req_t;
typedef struct {
        struct gf_stat preparent;
        struct gf_stat postparent;
} __attribute__((packed)) gf_fop_rmdir_rsp_t;


typedef struct {
	uint64_t par;
        uint64_t gen;
	char     path[0];
	char     bname[0];
	char     linkname[0];
} __attribute__((packed)) gf_fop_symlink_req_t;
typedef struct {
	struct gf_stat stat;
        struct gf_stat preparent;
        struct gf_stat postparent;
}__attribute__((packed)) gf_fop_symlink_rsp_t;


typedef struct {
	uint64_t   oldpar;
        uint64_t   oldgen;
	uint64_t   newpar;
        uint64_t   newgen;
	char       oldpath[0];
	char       oldbname[0]; /* NULL terminated */
	char       newpath[0];
	char       newbname[0]; /* NULL terminated */
} __attribute__((packed)) gf_fop_rename_req_t;
typedef struct {
	struct gf_stat stat;
        struct gf_stat preoldparent;
        struct gf_stat postoldparent;
        struct gf_stat prenewparent;
        struct gf_stat postnewparent;
} __attribute__((packed)) gf_fop_rename_rsp_t;


typedef struct {
	uint64_t   oldino;
        uint64_t   oldgen;
	uint64_t   newpar;
        uint64_t   newgen;
	char       oldpath[0];
	char       newpath[0];
	char       newbname[0];
}__attribute__((packed)) gf_fop_link_req_t;
typedef struct {
	struct gf_stat stat;
        struct gf_stat preparent;
        struct gf_stat postparent;
} __attribute__((packed)) gf_fop_link_rsp_t;

typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint64_t offset;
	char     path[0];
} __attribute__((packed)) gf_fop_truncate_req_t;
typedef struct {
	struct gf_stat prestat;
        struct gf_stat poststat;
} __attribute__((packed)) gf_fop_truncate_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint32_t flags;
        uint32_t wbflags;
	char     path[0];
} __attribute__((packed)) gf_fop_open_req_t;
typedef struct {
	int64_t fd;
} __attribute__((packed)) gf_fop_open_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint64_t offset;
	uint32_t size;
} __attribute__((packed)) gf_fop_read_req_t;
typedef struct {
	struct gf_stat stat;
	char buf[0];
} __attribute__((packed)) gf_fop_read_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint64_t offset;
	uint32_t size;
} __attribute__((packed)) gf_fop_write_req_t;
typedef struct {
	struct gf_stat prestat;
        struct gf_stat poststat;
} __attribute__((packed)) gf_fop_write_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	char     path[0];
} __attribute__((packed)) gf_fop_statfs_req_t;
typedef struct {
	struct gf_statfs statfs;
} __attribute__((packed)) gf_fop_statfs_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
} __attribute__((packed)) gf_fop_flush_req_t;
typedef struct { } __attribute__((packed)) gf_fop_flush_rsp_t;


typedef struct fsync_req {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint32_t data;
} __attribute__((packed)) gf_fop_fsync_req_t;
typedef struct {
        struct gf_stat prestat;
        struct gf_stat poststat;
} __attribute__((packed)) gf_fop_fsync_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint32_t flags;
	uint32_t dict_len;
	char     dict[0];
	char     path[0];
} __attribute__((packed)) gf_fop_setxattr_req_t;
typedef struct { } __attribute__((packed)) gf_fop_setxattr_rsp_t;


typedef struct {
        uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint32_t flags;
	uint32_t dict_len;
	char     dict[0];
} __attribute__((packed)) gf_fop_fsetxattr_req_t;
typedef struct { } __attribute__((packed)) gf_fop_fsetxattr_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint32_t flags;
	uint32_t dict_len;
	char     dict[0];
	char     path[0];
} __attribute__((packed)) gf_fop_xattrop_req_t;

typedef struct {
	uint32_t dict_len;
	char  dict[0];
} __attribute__((packed)) gf_fop_xattrop_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint32_t flags;
	uint32_t dict_len;
	char     dict[0];
} __attribute__((packed)) gf_fop_fxattrop_req_t;

typedef struct {
	uint32_t dict_len;
	char  dict[0];
} __attribute__((packed)) gf_fop_fxattrop_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint32_t namelen;
	char     path[0];
	char     name[0];
} __attribute__((packed)) gf_fop_getxattr_req_t;
typedef struct {
	uint32_t dict_len;
	char     dict[0];
} __attribute__((packed)) gf_fop_getxattr_rsp_t;


typedef struct {
        uint64_t ino;
        uint64_t gen;
	int64_t  fd;
        uint32_t namelen;
	char     name[0];
} __attribute__((packed)) gf_fop_fgetxattr_req_t;
typedef struct {
	uint32_t dict_len;
	char     dict[0];
} __attribute__((packed)) gf_fop_fgetxattr_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	char     path[0];
	char     name[0];
} __attribute__((packed)) gf_fop_removexattr_req_t;
typedef struct { } __attribute__((packed)) gf_fop_removexattr_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	char     path[0];
} __attribute__((packed)) gf_fop_opendir_req_t;
typedef struct {
	int64_t fd;
} __attribute__((packed)) gf_fop_opendir_rsp_t;


typedef struct fsyncdir_req {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	int32_t  data;
} __attribute__((packed)) gf_fop_fsyncdir_req_t;
typedef struct {
} __attribute__((packed)) gf_fop_fsyncdir_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint64_t offset;
	uint32_t size;
} __attribute__((packed)) gf_fop_readdir_req_t;
typedef struct {
	uint32_t size;
	char     buf[0];
} __attribute__((packed)) gf_fop_readdir_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint64_t offset;
	uint32_t size;
} __attribute__((packed)) gf_fop_readdirp_req_t;
typedef struct {
	uint32_t size;
	char     buf[0];
} __attribute__((packed)) gf_fop_readdirp_rsp_t;


typedef struct  {
	uint64_t ino;
        uint64_t gen;
	uint32_t mask;
	char     path[0];
} __attribute__((packed)) gf_fop_access_req_t;
typedef struct {
} __attribute__((packed)) gf_fop_access_rsp_t;


typedef struct {
	uint64_t par;
        uint64_t gen;
	uint32_t flags;
	uint32_t mode;
	char     path[0];
	char     bname[0];
} __attribute__((packed)) gf_fop_create_req_t;
typedef struct {
	struct gf_stat stat;
	uint64_t       fd;
        struct gf_stat preparent;
        struct gf_stat postparent;
} __attribute__((packed)) gf_fop_create_rsp_t;



typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint64_t offset;
} __attribute__((packed)) gf_fop_ftruncate_req_t;
typedef struct {
	struct gf_stat prestat;
        struct gf_stat poststat;
} __attribute__((packed)) gf_fop_ftruncate_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
} __attribute__((packed)) gf_fop_fstat_req_t;
typedef struct {
	struct gf_stat stat;
} __attribute__((packed)) gf_fop_fstat_rsp_t;


typedef struct {
	uint64_t        ino;
        uint64_t        gen;
	int64_t         fd;
	uint32_t        cmd;
	uint32_t        type;
	struct gf_flock flock;
} __attribute__((packed)) gf_fop_lk_req_t;
typedef struct {
	struct gf_flock flock;
} __attribute__((packed)) gf_fop_lk_rsp_t;

typedef struct {
	uint64_t ino;
        uint64_t gen;
	uint32_t cmd;
	uint32_t type;
	struct gf_flock flock;
	char     path[0];
        char     volume[0];
} __attribute__((packed)) gf_fop_inodelk_req_t;
typedef struct {
} __attribute__((packed)) gf_fop_inodelk_rsp_t;

typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint32_t cmd;
	uint32_t type;
	struct gf_flock flock;
        char volume[0];
} __attribute__((packed)) gf_fop_finodelk_req_t;
typedef struct {
} __attribute__((packed)) gf_fop_finodelk_rsp_t;

typedef struct {
	uint64_t  ino;
        uint64_t  gen;
	uint32_t  cmd;
	uint32_t  type;
	uint64_t  namelen;
	char      path[0];
	char      name[0];
        char      volume[0];
} __attribute__((packed)) gf_fop_entrylk_req_t;
typedef struct {
} __attribute__((packed)) gf_fop_entrylk_rsp_t;

typedef struct {
	uint64_t  ino;
        uint64_t  gen;
	int64_t   fd;
	uint32_t  cmd;
	uint32_t  type;
	uint64_t  namelen;
	char      name[0];
        char      volume[0];
} __attribute__((packed)) gf_fop_fentrylk_req_t;
typedef struct {
} __attribute__((packed)) gf_fop_fentrylk_rsp_t;

typedef struct {
	uint64_t ino; /* NOTE: used only in case of 'root' lookup */
	uint64_t par;
        uint64_t gen;
	uint32_t flags;
	uint32_t dictlen;
	char     path[0];
	char     bname[0];
	char     dict[0];
} __attribute__((packed)) gf_fop_lookup_req_t;
typedef struct {
	struct gf_stat stat;
        struct gf_stat postparent;
	uint32_t       dict_len;
	char           dict[0];
} __attribute__((packed)) gf_fop_lookup_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint32_t flags;
	uint32_t count;
	char     buf[0];
} __attribute__((packed)) gf_fop_setdents_req_t;
typedef struct { } __attribute__((packed)) gf_fop_setdents_rsp_t;

typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
	uint64_t offset;
	uint32_t size;
	uint32_t flags;
} __attribute__((packed)) gf_fop_getdents_req_t;
typedef struct {
	uint32_t count;
	char buf[0];
} __attribute__((packed)) gf_fop_getdents_rsp_t;


typedef struct {
	uint64_t  ino;
        uint64_t  gen;
	uint32_t  flag;
	char      path[0];
} __attribute__((packed)) gf_fop_checksum_req_t;
typedef struct {
	unsigned char fchecksum[0];
	unsigned char dchecksum[0];
} __attribute__((packed)) gf_fop_checksum_rsp_t;

typedef struct {
        uint64_t       ino;
        uint64_t       gen;
        struct gf_stat stbuf;
        int32_t        valid;
        char           path[0];
} __attribute__((packed)) gf_fop_setattr_req_t;
typedef struct {
        struct gf_stat statpre;
        struct gf_stat statpost;
} __attribute__((packed)) gf_fop_setattr_rsp_t;

typedef struct {
        int64_t        fd;
        struct gf_stat stbuf;
        int32_t        valid;
} __attribute__((packed)) gf_fop_fsetattr_req_t;
typedef struct {
        struct gf_stat statpre;
        struct gf_stat statpost;
} __attribute__((packed)) gf_fop_fsetattr_rsp_t;

typedef struct {
        int64_t   fd;
        uint64_t  offset;
        uint32_t  len;
} __attribute__((packed)) gf_fop_rchecksum_req_t;
typedef struct {
        uint32_t weak_checksum;
        unsigned char strong_checksum[0];
} __attribute__((packed)) gf_fop_rchecksum_rsp_t;


typedef struct {
	uint64_t  ino;
        uint64_t  gen;
	int32_t   timeout;
} __attribute__((packed)) gf_fop_lock_notify_req_t;
typedef struct { } __attribute__((packed)) gf_fop_lock_notify_rsp_t;


typedef struct {
	int64_t   fd;
	int32_t   timeout;
} __attribute__((packed)) gf_fop_lock_fnotify_req_t;
typedef struct { } __attribute__((packed)) gf_fop_lock_fnotify_rsp_t;


typedef struct {
	char name[0];
} __attribute__((packed)) gf_mop_lock_req_t;
typedef struct {} __attribute__((packed)) gf_mop_lock_rsp_t;

typedef struct {
	char name[0];
} __attribute__((packed)) gf_mop_unlock_req_t;
typedef struct {} __attribute__((packed)) gf_mop_unlock_rsp_t;

typedef struct {
	char pattern[0];
} __attribute__((packed)) gf_mop_listlocks_req_t;
typedef struct {} __attribute__((packed)) gf_mop_listlocks_rsp_t;

typedef struct {
	uint32_t  flags;
} __attribute__((packed)) gf_mop_stats_req_t;
typedef struct {
	char buf[0];
} __attribute__((packed)) gf_mop_stats_rsp_t;

typedef struct {
	uint32_t flags;
	uint32_t keylen;
	char     key[0];
} __attribute__((packed)) gf_mop_getspec_req_t;
typedef struct {
	char spec[0];
} __attribute__((packed)) gf_mop_getspec_rsp_t;


typedef struct {
        uint32_t msglen;
	char     msg[0];
} __attribute__((packed)) gf_mop_log_req_t;
typedef struct {
} __attribute__((packed)) gf_mop_log_rsp_t;


typedef struct {
	uint32_t dict_len;
	char buf[0];
} __attribute__((packed)) gf_mop_setvolume_req_t;
typedef struct {
	uint32_t dict_len;
	char buf[0];
} __attribute__((packed)) gf_mop_setvolume_rsp_t;


typedef struct {
} __attribute__((packed)) gf_mop_ping_req_t;
typedef struct {
} __attribute__((packed)) gf_mop_ping_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
} __attribute__((packed)) gf_cbk_releasedir_req_t;
typedef struct {
} __attribute__((packed)) gf_cbk_releasedir_rsp_t;


typedef struct {
	uint64_t ino;
        uint64_t gen;
	int64_t  fd;
} __attribute__((packed)) gf_cbk_release_req_t;
typedef struct {
} __attribute__((packed)) gf_cbk_release_rsp_t;


typedef struct {
	uint32_t count;
	uint64_t ino_array[0];
} __attribute__((packed)) gf_cbk_forget_req_t;
typedef struct { } __attribute__((packed)) gf_cbk_forget_rsp_t;


typedef struct {
	uint32_t pid;
	uint32_t uid;
	uint32_t gid;
} __attribute__ ((packed)) gf_hdr_req_t;


typedef struct {
	uint32_t op_ret;
	uint32_t op_errno;
} __attribute__ ((packed)) gf_hdr_rsp_t;


typedef struct {
	uint64_t callid;
	uint32_t type;
	uint32_t op;
	uint32_t size;
	union {
		gf_hdr_req_t req;
		gf_hdr_rsp_t rsp;
	} __attribute__ ((packed));
} __attribute__ ((packed)) gf_hdr_common_t;


static inline gf_hdr_common_t *
__gf_hdr_new (int size)
{
	gf_hdr_common_t *hdr = NULL;

	/* TODO: use mem-pool */
	hdr = CALLOC (sizeof (gf_hdr_common_t) + size, 1);

	if (!hdr) {
		return NULL;
	}

	hdr->size = hton32 (size);

	return hdr;
}


#define gf_hdr_len(type, x) (sizeof (gf_hdr_common_t) + sizeof (*type) + x)
#define gf_hdr_new(type, x) __gf_hdr_new (sizeof (*type) + x)


static inline void *
gf_param (gf_hdr_common_t *hdr)
{
	return ((void *)hdr) + sizeof (*hdr);
}

#endif