aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/lustre/lustre/include/lustre/lustre_user.h
blob: 7d8628ce0d3b3a66a2fb1474de01018cc4765097 (plain) (blame)
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
/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program 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 version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2010, 2015, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/include/lustre/lustre_user.h
 *
 * Lustre public user-space interface definitions.
 */

#ifndef _LUSTRE_USER_H
#define _LUSTRE_USER_H

/** \defgroup lustreuser lustreuser
 *
 * @{
 */

#ifdef __KERNEL__
# include <linux/quota.h>
# include <linux/sched/signal.h>
# include <linux/string.h> /* snprintf() */
# include <linux/version.h>
#else /* !__KERNEL__ */
# define NEED_QUOTA_DEFS
# include <stdio.h> /* snprintf() */
# include <string.h>
# include <sys/quota.h>
# include <sys/stat.h>
#endif /* __KERNEL__ */
#include "ll_fiemap.h"

/*
 * We need to always use 64bit version because the structure
 * is shared across entire cluster where 32bit and 64bit machines
 * are co-existing.
 */
#if __BITS_PER_LONG != 64 || defined(__ARCH_WANT_STAT64)
typedef struct stat64   lstat_t;
#define lstat_f  lstat64
#define fstat_f		fstat64
#define fstatat_f	fstatat64
#else
typedef struct stat     lstat_t;
#define lstat_f  lstat
#define fstat_f		fstat
#define fstatat_f	fstatat
#endif

#define HAVE_LOV_USER_MDS_DATA

#define LUSTRE_EOF 0xffffffffffffffffULL

/* for statfs() */
#define LL_SUPER_MAGIC 0x0BD00BD0

#ifndef FSFILT_IOC_GETFLAGS
#define FSFILT_IOC_GETFLAGS	       _IOR('f', 1, long)
#define FSFILT_IOC_SETFLAGS	       _IOW('f', 2, long)
#define FSFILT_IOC_GETVERSION	     _IOR('f', 3, long)
#define FSFILT_IOC_SETVERSION	     _IOW('f', 4, long)
#define FSFILT_IOC_GETVERSION_OLD	 _IOR('v', 1, long)
#define FSFILT_IOC_SETVERSION_OLD	 _IOW('v', 2, long)
#endif

/* FIEMAP flags supported by Lustre */
#define LUSTRE_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_DEVICE_ORDER)

enum obd_statfs_state {
	OS_STATE_DEGRADED       = 0x00000001, /**< RAID degraded/rebuilding */
	OS_STATE_READONLY       = 0x00000002, /**< filesystem is read-only */
	OS_STATE_RDONLY_1       = 0x00000004, /**< obsolete 1.6, was EROFS=30 */
	OS_STATE_RDONLY_2       = 0x00000008, /**< obsolete 1.6, was EROFS=30 */
	OS_STATE_RDONLY_3       = 0x00000010, /**< obsolete 1.6, was EROFS=30 */
};

struct obd_statfs {
	__u64	   os_type;
	__u64	   os_blocks;
	__u64	   os_bfree;
	__u64	   os_bavail;
	__u64	   os_files;
	__u64	   os_ffree;
	__u8	    os_fsid[40];
	__u32	   os_bsize;
	__u32	   os_namelen;
	__u64	   os_maxbytes;
	__u32	   os_state;       /**< obd_statfs_state OS_STATE_* flag */
	__u32	   os_fprecreated; /* objs available now to the caller */
				   /* used in QoS code to find preferred OSTs */
	__u32	   os_spare2;
	__u32	   os_spare3;
	__u32	   os_spare4;
	__u32	   os_spare5;
	__u32	   os_spare6;
	__u32	   os_spare7;
	__u32	   os_spare8;
	__u32	   os_spare9;
};

/**
 * File IDentifier.
 *
 * FID is a cluster-wide unique identifier of a file or an object (stripe).
 * FIDs are never reused.
 **/
struct lu_fid {
       /**
	* FID sequence. Sequence is a unit of migration: all files (objects)
	* with FIDs from a given sequence are stored on the same server.
	* Lustre should support 2^64 objects, so even if each sequence
	* has only a single object we can still enumerate 2^64 objects.
	**/
	__u64 f_seq;
	/* FID number within sequence. */
	__u32 f_oid;
	/**
	 * FID version, used to distinguish different versions (in the sense
	 * of snapshots, etc.) of the same file system object. Not currently
	 * used.
	 **/
	__u32 f_ver;
};

static inline bool fid_is_zero(const struct lu_fid *fid)
{
	return !fid->f_seq && !fid->f_oid;
}

struct filter_fid {
	struct lu_fid	ff_parent;  /* ff_parent.f_ver == file stripe number */
};

/* keep this one for compatibility */
struct filter_fid_old {
	struct lu_fid	ff_parent;
	__u64		ff_objid;
	__u64		ff_seq;
};

/* Userspace should treat lu_fid as opaque, and only use the following methods
 * to print or parse them.  Other functions (e.g. compare, swab) could be moved
 * here from lustre_idl.h if needed.
 */
struct lu_fid;

/**
 * Following struct for object attributes, that will be kept inode's EA.
 * Introduced in 2.0 release (please see b15993, for details)
 * Added to all objects since Lustre 2.4 as contains self FID
 */
struct lustre_mdt_attrs {
	/**
	 * Bitfield for supported data in this structure. From enum lma_compat.
	 * lma_self_fid and lma_flags are always available.
	 */
	__u32   lma_compat;
	/**
	 * Per-file incompat feature list. Lustre version should support all
	 * flags set in this field. The supported feature mask is available in
	 * LMA_INCOMPAT_SUPP.
	 */
	__u32   lma_incompat;
	/** FID of this inode */
	struct lu_fid  lma_self_fid;
};

/**
 * Prior to 2.4, the LMA structure also included SOM attributes which has since
 * been moved to a dedicated xattr
 * lma_flags was also removed because of lma_compat/incompat fields.
 */
#define LMA_OLD_SIZE (sizeof(struct lustre_mdt_attrs) + 5 * sizeof(__u64))

/**
 * OST object IDentifier.
 */
struct ost_id {
	union {
		struct {
			__u64	oi_id;
			__u64	oi_seq;
		} oi;
		struct lu_fid oi_fid;
	};
};

#define DOSTID "%#llx:%llu"
#define POSTID(oi) ostid_seq(oi), ostid_id(oi)

/*
 * The ioctl naming rules:
 * LL_*     - works on the currently opened filehandle instead of parent dir
 * *_OBD_*  - gets data for both OSC or MDC (LOV, LMV indirectly)
 * *_MDC_*  - gets/sets data related to MDC
 * *_LOV_*  - gets/sets data related to OSC/LOV
 * *FILE*   - called on parent dir and passes in a filename
 * *STRIPE* - set/get lov_user_md
 * *INFO    - set/get lov_user_mds_data
 */
/*	lustre_ioctl.h			101-150 */
#define LL_IOC_GETFLAGS		 _IOR('f', 151, long)
#define LL_IOC_SETFLAGS		 _IOW('f', 152, long)
#define LL_IOC_CLRFLAGS		 _IOW('f', 153, long)
#define LL_IOC_LOV_SETSTRIPE	    _IOW('f', 154, long)
#define LL_IOC_LOV_GETSTRIPE	    _IOW('f', 155, long)
#define LL_IOC_LOV_SETEA		_IOW('f', 156, long)
/*	LL_IOC_RECREATE_OBJ		157 obsolete */
/*	LL_IOC_RECREATE_FID		158 obsolete */
#define LL_IOC_GROUP_LOCK	       _IOW('f', 158, long)
#define LL_IOC_GROUP_UNLOCK	     _IOW('f', 159, long)
/* #define LL_IOC_QUOTACHECK		160 OBD_IOC_QUOTACHECK */
/* #define LL_IOC_POLL_QUOTACHECK	161 OBD_IOC_POLL_QUOTACHECK */
/* #define LL_IOC_QUOTACTL		162 OBD_IOC_QUOTACTL */
#define IOC_OBD_STATFS		  _IOWR('f', 164, struct obd_statfs *)
/*	IOC_LOV_GETINFO			165 obsolete */
#define LL_IOC_FLUSHCTX		 _IOW('f', 166, long)
/* LL_IOC_RMTACL			167 obsolete */
#define LL_IOC_GETOBDCOUNT	      _IOR('f', 168, long)
#define LL_IOC_LLOOP_ATTACH	     _IOWR('f', 169, long)
#define LL_IOC_LLOOP_DETACH	     _IOWR('f', 170, long)
#define LL_IOC_LLOOP_INFO	       _IOWR('f', 171, struct lu_fid)
#define LL_IOC_LLOOP_DETACH_BYDEV       _IOWR('f', 172, long)
#define LL_IOC_PATH2FID		 _IOR('f', 173, long)
#define LL_IOC_GET_CONNECT_FLAGS	_IOWR('f', 174, __u64 *)
#define LL_IOC_GET_MDTIDX	       _IOR('f', 175, int)

/*	lustre_ioctl.h			177-210 */
#define LL_IOC_HSM_STATE_GET		_IOR('f', 211, struct hsm_user_state)
#define LL_IOC_HSM_STATE_SET		_IOW('f', 212, struct hsm_state_set)
#define LL_IOC_HSM_CT_START		_IOW('f', 213, struct lustre_kernelcomm)
#define LL_IOC_HSM_COPY_START		_IOW('f', 214, struct hsm_copy *)
#define LL_IOC_HSM_COPY_END		_IOW('f', 215, struct hsm_copy *)
#define LL_IOC_HSM_PROGRESS		_IOW('f', 216, struct hsm_user_request)
#define LL_IOC_HSM_REQUEST		_IOW('f', 217, struct hsm_user_request)
#define LL_IOC_DATA_VERSION		_IOR('f', 218, struct ioc_data_version)
#define LL_IOC_LOV_SWAP_LAYOUTS		_IOW('f', 219, \
						struct lustre_swap_layouts)
#define LL_IOC_HSM_ACTION		_IOR('f', 220, \
						struct hsm_current_action)
/* see <lustre_lib.h> for ioctl numbers 221-232 */

#define LL_IOC_LMV_SETSTRIPE	    _IOWR('f', 240, struct lmv_user_md)
#define LL_IOC_LMV_GETSTRIPE	    _IOWR('f', 241, struct lmv_user_md)
#define LL_IOC_SET_LEASE		_IOWR('f', 243, long)
#define LL_IOC_GET_LEASE		_IO('f', 244)
#define LL_IOC_HSM_IMPORT		_IOWR('f', 245, struct hsm_user_import)
#define LL_IOC_LMV_SET_DEFAULT_STRIPE	_IOWR('f', 246, struct lmv_user_md)
#define LL_IOC_MIGRATE			_IOR('f', 247, int)
#define LL_IOC_FID2MDTIDX		_IOWR('f', 248, struct lu_fid)
#define LL_IOC_GETPARENT		_IOWR('f', 249, struct getparent)

/* Lease types for use as arg and return of LL_IOC_{GET,SET}_LEASE ioctl. */
enum ll_lease_type {
	LL_LEASE_RDLCK	= 0x1,
	LL_LEASE_WRLCK	= 0x2,
	LL_LEASE_UNLCK	= 0x4,
};

#define LL_STATFS_LMV	   1
#define LL_STATFS_LOV	   2
#define LL_STATFS_NODELAY	4

#define IOC_MDC_TYPE	    'i'
#define IOC_MDC_LOOKUP	  _IOWR(IOC_MDC_TYPE, 20, struct obd_device *)
#define IOC_MDC_GETFILESTRIPE   _IOWR(IOC_MDC_TYPE, 21, struct lov_user_md *)
#define IOC_MDC_GETFILEINFO     _IOWR(IOC_MDC_TYPE, 22, struct lov_user_mds_data *)
#define LL_IOC_MDC_GETINFO      _IOWR(IOC_MDC_TYPE, 23, struct lov_user_mds_data *)

#define MAX_OBD_NAME 128 /* If this changes, a NEW ioctl must be added */

/* Define O_LOV_DELAY_CREATE to be a mask that is not useful for regular
 * files, but are unlikely to be used in practice and are not harmful if
 * used incorrectly.  O_NOCTTY and FASYNC are only meaningful for character
 * devices and are safe for use on new files (See LU-812, LU-4209).
 */
#define O_LOV_DELAY_CREATE	(O_NOCTTY | FASYNC)

#define LL_FILE_IGNORE_LOCK     0x00000001
#define LL_FILE_GROUP_LOCKED    0x00000002
#define LL_FILE_READAHEA	0x00000004
#define LL_FILE_LOCKED_DIRECTIO 0x00000008 /* client-side locks with dio */
#define LL_FILE_LOCKLESS_IO     0x00000010 /* server-side locks with cio */
#define LL_FILE_RMTACL	  0x00000020

#define LOV_USER_MAGIC_V1	0x0BD10BD0
#define LOV_USER_MAGIC		LOV_USER_MAGIC_V1
#define LOV_USER_MAGIC_JOIN_V1	0x0BD20BD0
#define LOV_USER_MAGIC_V3	0x0BD30BD0
/* 0x0BD40BD0 is occupied by LOV_MAGIC_MIGRATE */
#define LOV_USER_MAGIC_SPECIFIC	0x0BD50BD0	/* for specific OSTs */

#define LMV_USER_MAGIC    0x0CD30CD0    /*default lmv magic*/

#define LOV_PATTERN_RAID0	0x001
#define LOV_PATTERN_RAID1	0x002
#define LOV_PATTERN_FIRST	0x100
#define LOV_PATTERN_CMOBD	0x200

#define LOV_PATTERN_F_MASK	0xffff0000
#define LOV_PATTERN_F_HOLE	0x40000000 /* there is hole in LOV EA */
#define LOV_PATTERN_F_RELEASED	0x80000000 /* HSM released file */

#define LOV_MAXPOOLNAME 15
#define LOV_POOLNAMEF "%.15s"

#define LOV_MIN_STRIPE_BITS 16   /* maximum PAGE_SIZE (ia64), power of 2 */
#define LOV_MIN_STRIPE_SIZE (1 << LOV_MIN_STRIPE_BITS)
#define LOV_MAX_STRIPE_COUNT_OLD 160
/* This calculation is crafted so that input of 4096 will result in 160
 * which in turn is equal to old maximal stripe count.
 * XXX: In fact this is too simplified for now, what it also need is to get
 * ea_type argument to clearly know how much space each stripe consumes.
 *
 * The limit of 12 pages is somewhat arbitrary, but is a reasonably large
 * allocation that is sufficient for the current generation of systems.
 *
 * (max buffer size - lov+rpc header) / sizeof(struct lov_ost_data_v1)
 */
#define LOV_MAX_STRIPE_COUNT 2000  /* ((12 * 4096 - 256) / 24) */
#define LOV_ALL_STRIPES       0xffff /* only valid for directories */
#define LOV_V1_INSANE_STRIPE_COUNT 65532 /* maximum stripe count bz13933 */

#define XATTR_LUSTRE_PREFIX	"lustre."
#define XATTR_LUSTRE_LOV	"lustre.lov"

#define lov_user_ost_data lov_user_ost_data_v1
struct lov_user_ost_data_v1 {     /* per-stripe data structure */
	struct ost_id l_ost_oi;	  /* OST object ID */
	__u32 l_ost_gen;	  /* generation of this OST index */
	__u32 l_ost_idx;	  /* OST index in LOV */
} __packed;

#define lov_user_md lov_user_md_v1
struct lov_user_md_v1 {	   /* LOV EA user data (host-endian) */
	__u32 lmm_magic;	  /* magic number = LOV_USER_MAGIC_V1 */
	__u32 lmm_pattern;	/* LOV_PATTERN_RAID0, LOV_PATTERN_RAID1 */
	struct ost_id lmm_oi;	  /* LOV object ID */
	__u32 lmm_stripe_size;    /* size of stripe in bytes */
	__u16 lmm_stripe_count;   /* num stripes in use for this object */
	union {
		__u16 lmm_stripe_offset;  /* starting stripe offset in
					   * lmm_objects, use when writing
					   */
		__u16 lmm_layout_gen;     /* layout generation number
					   * used when reading
					   */
	};
	struct lov_user_ost_data_v1 lmm_objects[0]; /* per-stripe data */
} __attribute__((packed,  __may_alias__));

struct lov_user_md_v3 {	   /* LOV EA user data (host-endian) */
	__u32 lmm_magic;	  /* magic number = LOV_USER_MAGIC_V3 */
	__u32 lmm_pattern;	/* LOV_PATTERN_RAID0, LOV_PATTERN_RAID1 */
	struct ost_id lmm_oi;	  /* LOV object ID */
	__u32 lmm_stripe_size;    /* size of stripe in bytes */
	__u16 lmm_stripe_count;   /* num stripes in use for this object */
	union {
		__u16 lmm_stripe_offset;  /* starting stripe offset in
					   * lmm_objects, use when writing
					   */
		__u16 lmm_layout_gen;     /* layout generation number
					   * used when reading
					   */
	};
	char  lmm_pool_name[LOV_MAXPOOLNAME + 1];   /* pool name */
	struct lov_user_ost_data_v1 lmm_objects[0]; /* per-stripe data */
} __packed;

static inline __u32 lov_user_md_size(__u16 stripes, __u32 lmm_magic)
{
	if (lmm_magic == LOV_USER_MAGIC_V1)
		return sizeof(struct lov_user_md_v1) +
				stripes * sizeof(struct lov_user_ost_data_v1);
	return sizeof(struct lov_user_md_v3) +
	       stripes * sizeof(struct lov_user_ost_data_v1);
}

/* Compile with -D_LARGEFILE64_SOURCE or -D_GNU_SOURCE (or #define) to
 * use this.  It is unsafe to #define those values in this header as it
 * is possible the application has already #included <sys/stat.h>. */
#ifdef HAVE_LOV_USER_MDS_DATA
#define lov_user_mds_data lov_user_mds_data_v1
struct lov_user_mds_data_v1 {
	lstat_t lmd_st;		 /* MDS stat struct */
	struct lov_user_md_v1 lmd_lmm;  /* LOV EA V1 user data */
} __packed;

struct lov_user_mds_data_v3 {
	lstat_t lmd_st;		 /* MDS stat struct */
	struct lov_user_md_v3 lmd_lmm;  /* LOV EA V3 user data */
} __packed;
#endif

struct lmv_user_mds_data {
	struct lu_fid	lum_fid;
	__u32		lum_padding;
	__u32		lum_mds;
};

enum lmv_hash_type {
	LMV_HASH_TYPE_UNKNOWN	= 0,	/* 0 is reserved for testing purpose */
	LMV_HASH_TYPE_ALL_CHARS = 1,
	LMV_HASH_TYPE_FNV_1A_64 = 2,
};

#define LMV_HASH_NAME_ALL_CHARS		"all_char"
#define LMV_HASH_NAME_FNV_1A_64		"fnv_1a_64"

/*
 * Got this according to how get LOV_MAX_STRIPE_COUNT, see above,
 * (max buffer size - lmv+rpc header) / sizeof(struct lmv_user_mds_data)
 */
#define LMV_MAX_STRIPE_COUNT 2000  /* ((12 * 4096 - 256) / 24) */
#define lmv_user_md lmv_user_md_v1
struct lmv_user_md_v1 {
	__u32	lum_magic;	 /* must be the first field */
	__u32	lum_stripe_count;  /* dirstripe count */
	__u32	lum_stripe_offset; /* MDT idx for default dirstripe */
	__u32	lum_hash_type;     /* Dir stripe policy */
	__u32	lum_type;	  /* LMV type: default or normal */
	__u32	lum_padding1;
	__u32	lum_padding2;
	__u32	lum_padding3;
	char	lum_pool_name[LOV_MAXPOOLNAME + 1];
	struct	lmv_user_mds_data  lum_objects[0];
} __packed;

static inline int lmv_user_md_size(int stripes, int lmm_magic)
{
	return sizeof(struct lmv_user_md) +
		      stripes * sizeof(struct lmv_user_mds_data);
}

struct ll_recreate_obj {
	__u64 lrc_id;
	__u32 lrc_ost_idx;
};

struct ll_fid {
	__u64 id;	 /* holds object id */
	__u32 generation; /* holds object generation */
	__u32 f_type;     /* holds object type or stripe idx when passing it to
			   * OST for saving into EA. */
};

#define UUID_MAX	40
struct obd_uuid {
	char uuid[UUID_MAX];
};

static inline bool obd_uuid_equals(const struct obd_uuid *u1,
				   const struct obd_uuid *u2)
{
	return strcmp((char *)u1->uuid, (char *)u2->uuid) == 0;
}

static inline int obd_uuid_empty(struct obd_uuid *uuid)
{
	return uuid->uuid[0] == '\0';
}

static inline void obd_str2uuid(struct obd_uuid *uuid, const char *tmp)
{
	strncpy((char *)uuid->uuid, tmp, sizeof(*uuid));
	uuid->uuid[sizeof(*uuid) - 1] = '\0';
}

/* For printf's only, make sure uuid is terminated */
static inline char *obd_uuid2str(const struct obd_uuid *uuid)
{
	if (!uuid)
		return NULL;

	if (uuid->uuid[sizeof(*uuid) - 1] != '\0') {
		/* Obviously not safe, but for printfs, no real harm done...
		 * we're always null-terminated, even in a race.
		 */
		static char temp[sizeof(*uuid)];

		memcpy(temp, uuid->uuid, sizeof(*uuid) - 1);
		temp[sizeof(*uuid) - 1] = '\0';
		return temp;
	}
	return (char *)(uuid->uuid);
}

/* Extract fsname from uuid (or target name) of a target
 * e.g. (myfs-OST0007_UUID -> myfs)
 * see also deuuidify.
 */
static inline void obd_uuid2fsname(char *buf, char *uuid, int buflen)
{
	char *p;

	strncpy(buf, uuid, buflen - 1);
	buf[buflen - 1] = '\0';
	p = strrchr(buf, '-');
	if (p)
		*p = '\0';
}

/* printf display format
 * * usage: printf("file FID is "DFID"\n", PFID(fid));
 */
#define FID_NOBRACE_LEN 40
#define FID_LEN (FID_NOBRACE_LEN + 2)
#define DFID_NOBRACE "%#llx:0x%x:0x%x"
#define DFID "["DFID_NOBRACE"]"
#define PFID(fid) (unsigned long long)(fid)->f_seq, (fid)->f_oid, (fid)->f_ver

/* scanf input parse format for fids in DFID_NOBRACE format
 * Need to strip '[' from DFID format first or use "["SFID"]" at caller.
 * usage: sscanf(fidstr, SFID, RFID(&fid));
 */
#define SFID "0x%llx:0x%x:0x%x"
#define RFID(fid) &((fid)->f_seq), &((fid)->f_oid), &((fid)->f_ver)

/********* Quotas **********/

#define Q_QUOTACHECK   0x800100 /* deprecated as of 2.4 */
#define Q_INITQUOTA    0x800101 /* deprecated as of 2.4  */
#define Q_GETOINFO     0x800102 /* get obd quota info */
#define Q_GETOQUOTA    0x800103 /* get obd quotas */
#define Q_FINVALIDATE  0x800104 /* deprecated as of 2.4 */

/* these must be explicitly translated into linux Q_* in ll_dir_ioctl */
#define LUSTRE_Q_QUOTAON    0x800002	/* deprecated as of 2.4 */
#define LUSTRE_Q_QUOTAOFF   0x800003	/* deprecated as of 2.4 */
#define LUSTRE_Q_GETINFO    0x800005     /* get information about quota files */
#define LUSTRE_Q_SETINFO    0x800006     /* set information about quota files */
#define LUSTRE_Q_GETQUOTA   0x800007     /* get user quota structure */
#define LUSTRE_Q_SETQUOTA   0x800008     /* set user quota structure */
/* lustre-specific control commands */
#define LUSTRE_Q_INVALIDATE  0x80000b	/* deprecated as of 2.4 */
#define LUSTRE_Q_FINVALIDATE 0x80000c	/* deprecated as of 2.4 */

#define UGQUOTA 2       /* set both USRQUOTA and GRPQUOTA */

#define IDENTITY_DOWNCALL_MAGIC 0x6d6dd629

/* permission */
#define N_PERMS_MAX      64

struct perm_downcall_data {
	__u64 pdd_nid;
	__u32 pdd_perm;
	__u32 pdd_padding;
};

struct identity_downcall_data {
	__u32			    idd_magic;
	__u32			    idd_err;
	__u32			    idd_uid;
	__u32			    idd_gid;
	__u32			    idd_nperms;
	__u32			    idd_ngroups;
	struct perm_downcall_data idd_perms[N_PERMS_MAX];
	__u32			    idd_groups[0];
};

/* lustre volatile file support
 * file name header: .^L^S^T^R:volatile"
 */
#define LUSTRE_VOLATILE_HDR	".\x0c\x13\x14\x12:VOLATILE"
#define LUSTRE_VOLATILE_HDR_LEN	14
/* hdr + MDT index */
#define LUSTRE_VOLATILE_IDX	LUSTRE_VOLATILE_HDR":%.4X:"

enum lustre_quota_version {
	LUSTRE_QUOTA_V2 = 1
};

/* XXX: same as if_dqinfo struct in kernel */
struct obd_dqinfo {
	__u64 dqi_bgrace;
	__u64 dqi_igrace;
	__u32 dqi_flags;
	__u32 dqi_valid;
};

/* XXX: same as if_dqblk struct in kernel, plus one padding */
struct obd_dqblk {
	__u64 dqb_bhardlimit;
	__u64 dqb_bsoftlimit;
	__u64 dqb_curspace;
	__u64 dqb_ihardlimit;
	__u64 dqb_isoftlimit;
	__u64 dqb_curinodes;
	__u64 dqb_btime;
	__u64 dqb_itime;
	__u32 dqb_valid;
	__u32 dqb_padding;
};

enum {
	QC_GENERAL      = 0,
	QC_MDTIDX       = 1,
	QC_OSTIDX       = 2,
	QC_UUID	 = 3
};

struct if_quotactl {
	__u32		   qc_cmd;
	__u32		   qc_type;
	__u32		   qc_id;
	__u32		   qc_stat;
	__u32		   qc_valid;
	__u32		   qc_idx;
	struct obd_dqinfo       qc_dqinfo;
	struct obd_dqblk	qc_dqblk;
	char		    obd_type[16];
	struct obd_uuid	 obd_uuid;
};

/* swap layout flags */
#define SWAP_LAYOUTS_CHECK_DV1		(1 << 0)
#define SWAP_LAYOUTS_CHECK_DV2		(1 << 1)
#define SWAP_LAYOUTS_KEEP_MTIME		(1 << 2)
#define SWAP_LAYOUTS_KEEP_ATIME		(1 << 3)
#define SWAP_LAYOUTS_CLOSE		BIT(4)

/* Swap XATTR_NAME_HSM as well, only on the MDT so far */
#define SWAP_LAYOUTS_MDS_HSM		(1 << 31)
struct lustre_swap_layouts {
	__u64	sl_flags;
	__u32	sl_fd;
	__u32	sl_gid;
	__u64	sl_dv1;
	__u64	sl_dv2;
};

/********* Changelogs **********/
/** Changelog record types */
enum changelog_rec_type {
	CL_MARK     = 0,
	CL_CREATE   = 1,  /* namespace */
	CL_MKDIR    = 2,  /* namespace */
	CL_HARDLINK = 3,  /* namespace */
	CL_SOFTLINK = 4,  /* namespace */
	CL_MKNOD    = 5,  /* namespace */
	CL_UNLINK   = 6,  /* namespace */
	CL_RMDIR    = 7,  /* namespace */
	CL_RENAME   = 8,  /* namespace */
	CL_EXT      = 9,  /* namespace extended record (2nd half of rename) */
	CL_OPEN     = 10, /* not currently used */
	CL_CLOSE    = 11, /* may be written to log only with mtime change */
	CL_LAYOUT   = 12, /* file layout/striping modified */
	CL_TRUNC    = 13,
	CL_SETATTR  = 14,
	CL_XATTR    = 15,
	CL_HSM      = 16, /* HSM specific events, see flags */
	CL_MTIME    = 17, /* Precedence: setattr > mtime > ctime > atime */
	CL_CTIME    = 18,
	CL_ATIME    = 19,
	CL_LAST
};

static inline const char *changelog_type2str(int type)
{
	static const char *changelog_str[] = {
		"MARK",  "CREAT", "MKDIR", "HLINK", "SLINK", "MKNOD", "UNLNK",
		"RMDIR", "RENME", "RNMTO", "OPEN",  "CLOSE", "LYOUT", "TRUNC",
		"SATTR", "XATTR", "HSM",   "MTIME", "CTIME", "ATIME",
	};

	if (type >= 0 && type < CL_LAST)
		return changelog_str[type];
	return NULL;
}

/* per-record flags */
#define CLF_FLAGSHIFT   12
#define CLF_FLAGMASK    ((1U << CLF_FLAGSHIFT) - 1)
#define CLF_VERMASK     (~CLF_FLAGMASK)
enum changelog_rec_flags {
	CLF_VERSION	= 0x1000,
	CLF_RENAME	= 0x2000,
	CLF_JOBID	= 0x4000,
	CLF_SUPPORTED	= CLF_VERSION | CLF_RENAME | CLF_JOBID
};

/* Anything under the flagmask may be per-type (if desired) */
/* Flags for unlink */
#define CLF_UNLINK_LAST       0x0001 /* Unlink of last hardlink */
#define CLF_UNLINK_HSM_EXISTS 0x0002 /* File has something in HSM */
				     /* HSM cleaning needed */
/* Flags for rename */
#define CLF_RENAME_LAST		0x0001	/* rename unlink last hardlink of
					 * target
					 */
#define CLF_RENAME_LAST_EXISTS	0x0002	/* rename unlink last hardlink of target
					 * has an archive in backend
					 */

/* Flags for HSM */
/* 12b used (from high weight to low weight):
 * 2b for flags
 * 3b for event
 * 7b for error code
 */
#define CLF_HSM_ERR_L	0 /* HSM return code, 7 bits */
#define CLF_HSM_ERR_H	6
#define CLF_HSM_EVENT_L      7 /* HSM event, 3 bits, see enum hsm_event */
#define CLF_HSM_EVENT_H      9
#define CLF_HSM_FLAG_L      10 /* HSM flags, 2 bits, 1 used, 1 spare */
#define CLF_HSM_FLAG_H      11
#define CLF_HSM_SPARE_L     12 /* 4 spare bits */
#define CLF_HSM_SPARE_H     15
#define CLF_HSM_LAST	15

/* Remove bits higher than _h, then extract the value
 * between _h and _l by shifting lower weigth to bit 0.
 */
#define CLF_GET_BITS(_b, _h, _l) (((_b << (CLF_HSM_LAST - _h)) & 0xFFFF) \
				   >> (CLF_HSM_LAST - _h + _l))

#define CLF_HSM_SUCCESS      0x00
#define CLF_HSM_MAXERROR     0x7E
#define CLF_HSM_ERROVERFLOW  0x7F

#define CLF_HSM_DIRTY	1 /* file is dirty after HSM request end */

/* 3 bits field => 8 values allowed */
enum hsm_event {
	HE_ARCHIVE      = 0,
	HE_RESTORE      = 1,
	HE_CANCEL       = 2,
	HE_RELEASE      = 3,
	HE_REMOVE       = 4,
	HE_STATE	= 5,
	HE_SPARE1       = 6,
	HE_SPARE2       = 7,
};

static inline enum hsm_event hsm_get_cl_event(__u16 flags)
{
	return CLF_GET_BITS(flags, CLF_HSM_EVENT_H, CLF_HSM_EVENT_L);
}

static inline void hsm_set_cl_event(int *flags, enum hsm_event he)
{
	*flags |= (he << CLF_HSM_EVENT_L);
}

static inline __u16 hsm_get_cl_flags(int flags)
{
	return CLF_GET_BITS(flags, CLF_HSM_FLAG_H, CLF_HSM_FLAG_L);
}

static inline void hsm_set_cl_flags(int *flags, int bits)
{
	*flags |= (bits << CLF_HSM_FLAG_L);
}

static inline int hsm_get_cl_error(int flags)
{
	return CLF_GET_BITS(flags, CLF_HSM_ERR_H, CLF_HSM_ERR_L);
}

static inline void hsm_set_cl_error(int *flags, int error)
{
	*flags |= (error << CLF_HSM_ERR_L);
}

enum changelog_send_flag {
	/* Not yet implemented */
	CHANGELOG_FLAG_FOLLOW	= BIT(0),
	/*
	 * Blocking IO makes sense in case of slow user parsing of the records,
	 * but it also prevents us from cleaning up if the records are not
	 * consumed.
	 */
	CHANGELOG_FLAG_BLOCK	= BIT(1),
	/* Pack jobid into the changelog records if available. */
	CHANGELOG_FLAG_JOBID	= BIT(2),
};

#define CR_MAXSIZE cfs_size_round(2 * NAME_MAX + 2 + \
				  changelog_rec_offset(CLF_SUPPORTED))

/* 31 usable bytes string + null terminator. */
#define LUSTRE_JOBID_SIZE	32

/*
 * This is the minimal changelog record. It can contain extensions
 * such as rename fields or process jobid. Its exact content is described
 * by the cr_flags.
 *
 * Extensions are packed in the same order as their corresponding flags.
 */
struct changelog_rec {
	__u16		 cr_namelen;
	__u16		 cr_flags; /**< \a changelog_rec_flags */
	__u32		 cr_type;  /**< \a changelog_rec_type */
	__u64		 cr_index; /**< changelog record number */
	__u64		 cr_prev;  /**< last index for this target fid */
	__u64		 cr_time;
	union {
		struct lu_fid    cr_tfid;	/**< target fid */
		__u32	 cr_markerflags; /**< CL_MARK flags */
	};
	struct lu_fid	    cr_pfid;	/**< parent fid */
} __packed;

/* Changelog extension for RENAME. */
struct changelog_ext_rename {
	struct lu_fid	cr_sfid;	/**< source fid, or zero */
	struct lu_fid	cr_spfid;	/**< source parent fid, or zero */
};

/* Changelog extension to include JOBID. */
struct changelog_ext_jobid {
	char	cr_jobid[LUSTRE_JOBID_SIZE];	/**< zero-terminated string. */
};

static inline size_t changelog_rec_offset(enum changelog_rec_flags crf)
{
	size_t size = sizeof(struct changelog_rec);

	if (crf & CLF_RENAME)
		size += sizeof(struct changelog_ext_rename);

	if (crf & CLF_JOBID)
		size += sizeof(struct changelog_ext_jobid);

	return size;
}

static inline size_t changelog_rec_size(struct changelog_rec *rec)
{
	return changelog_rec_offset(rec->cr_flags);
}

static inline size_t changelog_rec_varsize(struct changelog_rec *rec)
{
	return changelog_rec_size(rec) - sizeof(*rec) + rec->cr_namelen;
}

static inline
struct changelog_ext_rename *changelog_rec_rename(struct changelog_rec *rec)
{
	enum changelog_rec_flags crf = rec->cr_flags & CLF_VERSION;

	return (struct changelog_ext_rename *)((char *)rec +
					       changelog_rec_offset(crf));
}

/* The jobid follows the rename extension, if present */
static inline
struct changelog_ext_jobid *changelog_rec_jobid(struct changelog_rec *rec)
{
	enum changelog_rec_flags crf = rec->cr_flags &
				       (CLF_VERSION | CLF_RENAME);

	return (struct changelog_ext_jobid *)((char *)rec +
					      changelog_rec_offset(crf));
}

/* The name follows the rename and jobid extensions, if present */
static inline char *changelog_rec_name(struct changelog_rec *rec)
{
	return (char *)rec + changelog_rec_offset(rec->cr_flags &
						  CLF_SUPPORTED);
}

static inline size_t changelog_rec_snamelen(struct changelog_rec *rec)
{
	return rec->cr_namelen - strlen(changelog_rec_name(rec)) - 1;
}

static inline char *changelog_rec_sname(struct changelog_rec *rec)
{
	char *cr_name = changelog_rec_name(rec);

	return cr_name + strlen(cr_name) + 1;
}

/**
 * Remap a record to the desired format as specified by the crf flags.
 * The record must be big enough to contain the final remapped version.
 * Superfluous extension fields are removed and missing ones are added
 * and zeroed. The flags of the record are updated accordingly.
 *
 * The jobid and rename extensions can be added to a record, to match the
 * format an application expects, typically. In this case, the newly added
 * fields will be zeroed.
 * The Jobid field can be removed, to guarantee compatibility with older
 * clients that don't expect this field in the records they process.
 *
 * The following assumptions are being made:
 *	- CLF_RENAME will not be removed
 *	- CLF_JOBID will not be added without CLF_RENAME being added too
 *
 * @param[in,out]  rec		The record to remap.
 * @param[in]	   crf_wanted	Flags describing the desired extensions.
 */
static inline void changelog_remap_rec(struct changelog_rec *rec,
				       enum changelog_rec_flags crf_wanted)
{
	char *jid_mov, *rnm_mov;

	crf_wanted &= CLF_SUPPORTED;

	if ((rec->cr_flags & CLF_SUPPORTED) == crf_wanted)
		return;

	/* First move the variable-length name field */
	memmove((char *)rec + changelog_rec_offset(crf_wanted),
		changelog_rec_name(rec), rec->cr_namelen);

	/* Locations of jobid and rename extensions in the remapped record */
	jid_mov = (char *)rec +
		  changelog_rec_offset(crf_wanted & ~CLF_JOBID);
	rnm_mov = (char *)rec +
		  changelog_rec_offset(crf_wanted & ~(CLF_JOBID | CLF_RENAME));

	/* Move the extension fields to the desired positions */
	if ((crf_wanted & CLF_JOBID) && (rec->cr_flags & CLF_JOBID))
		memmove(jid_mov, changelog_rec_jobid(rec),
			sizeof(struct changelog_ext_jobid));

	if ((crf_wanted & CLF_RENAME) && (rec->cr_flags & CLF_RENAME))
		memmove(rnm_mov, changelog_rec_rename(rec),
			sizeof(struct changelog_ext_rename));

	/* Clear newly added fields */
	if ((crf_wanted & CLF_JOBID) && !(rec->cr_flags & CLF_JOBID))
		memset(jid_mov, 0, sizeof(struct changelog_ext_jobid));

	if ((crf_wanted & CLF_RENAME) && !(rec->cr_flags & CLF_RENAME))
		memset(rnm_mov, 0, sizeof(struct changelog_ext_rename));

	/* Update the record's flags accordingly */
	rec->cr_flags = (rec->cr_flags & CLF_FLAGMASK) | crf_wanted;
}

struct ioc_changelog {
	__u64 icc_recno;
	__u32 icc_mdtindex;
	__u32 icc_id;
	__u32 icc_flags;
};

enum changelog_message_type {
	CL_RECORD = 10, /* message is a changelog_rec */
	CL_EOF    = 11, /* at end of current changelog */
};

/********* Misc **********/

struct ioc_data_version {
	__u64 idv_version;
	__u64 idv_flags;     /* See LL_DV_xxx */
};

#define LL_DV_RD_FLUSH	BIT(0)	/* Flush dirty pages from clients */
#define LL_DV_WR_FLUSH	BIT(1)	/* Flush all caching pages from clients */

#ifndef offsetof
# define offsetof(typ, memb)     ((unsigned long)((char *)&(((typ *)0)->memb)))
#endif

#define dot_lustre_name ".lustre"

/********* HSM **********/

/** HSM per-file state
 * See HSM_FLAGS below.
 */
enum hsm_states {
	HS_NONE		= 0x00000000,
	HS_EXISTS	= 0x00000001,
	HS_DIRTY	= 0x00000002,
	HS_RELEASED	= 0x00000004,
	HS_ARCHIVED	= 0x00000008,
	HS_NORELEASE	= 0x00000010,
	HS_NOARCHIVE	= 0x00000020,
	HS_LOST		= 0x00000040,
};

/* HSM user-setable flags. */
#define HSM_USER_MASK   (HS_NORELEASE | HS_NOARCHIVE | HS_DIRTY)

/* Other HSM flags. */
#define HSM_STATUS_MASK (HS_EXISTS | HS_LOST | HS_RELEASED | HS_ARCHIVED)

/*
 * All HSM-related possible flags that could be applied to a file.
 * This should be kept in sync with hsm_states.
 */
#define HSM_FLAGS_MASK  (HSM_USER_MASK | HSM_STATUS_MASK)

/**
 * HSM request progress state
 */
enum hsm_progress_states {
	HPS_WAITING	= 1,
	HPS_RUNNING	= 2,
	HPS_DONE	= 3,
};

#define HPS_NONE	0

static inline char *hsm_progress_state2name(enum hsm_progress_states s)
{
	switch  (s) {
	case HPS_WAITING:	return "waiting";
	case HPS_RUNNING:	return "running";
	case HPS_DONE:		return "done";
	default:		return "unknown";
	}
}

struct hsm_extent {
	__u64 offset;
	__u64 length;
} __packed;

/**
 * Current HSM states of a Lustre file.
 *
 * This structure purpose is to be sent to user-space mainly. It describes the
 * current HSM flags and in-progress action.
 */
struct hsm_user_state {
	/** Current HSM states, from enum hsm_states. */
	__u32			hus_states;
	__u32			hus_archive_id;
	/**  The current undergoing action, if there is one */
	__u32			hus_in_progress_state;
	__u32			hus_in_progress_action;
	struct hsm_extent	hus_in_progress_location;
	char			hus_extended_info[];
};

struct hsm_state_set_ioc {
	struct lu_fid	hssi_fid;
	__u64		hssi_setmask;
	__u64		hssi_clearmask;
};

/*
 * This structure describes the current in-progress action for a file.
 * it is returned to user space and send over the wire
 */
struct hsm_current_action {
	/**  The current undergoing action, if there is one */
	/* state is one of hsm_progress_states */
	__u32			hca_state;
	/* action is one of hsm_user_action */
	__u32			hca_action;
	struct hsm_extent	hca_location;
};

/***** HSM user requests ******/
/* User-generated (lfs/ioctl) request types */
enum hsm_user_action {
	HUA_NONE    =  1, /* no action (noop) */
	HUA_ARCHIVE = 10, /* copy to hsm */
	HUA_RESTORE = 11, /* prestage */
	HUA_RELEASE = 12, /* drop ost objects */
	HUA_REMOVE  = 13, /* remove from archive */
	HUA_CANCEL  = 14  /* cancel a request */
};

static inline char *hsm_user_action2name(enum hsm_user_action  a)
{
	switch  (a) {
	case HUA_NONE:    return "NOOP";
	case HUA_ARCHIVE: return "ARCHIVE";
	case HUA_RESTORE: return "RESTORE";
	case HUA_RELEASE: return "RELEASE";
	case HUA_REMOVE:  return "REMOVE";
	case HUA_CANCEL:  return "CANCEL";
	default:	  return "UNKNOWN";
	}
}

/*
 * List of hr_flags (bit field)
 */
#define HSM_FORCE_ACTION 0x0001
/* used by CT, connot be set by user */
#define HSM_GHOST_COPY   0x0002

/**
 * Contains all the fixed part of struct hsm_user_request.
 *
 */
struct hsm_request {
	__u32 hr_action;	/* enum hsm_user_action */
	__u32 hr_archive_id;	/* archive id, used only with HUA_ARCHIVE */
	__u64 hr_flags;		/* request flags */
	__u32 hr_itemcount;	/* item count in hur_user_item vector */
	__u32 hr_data_len;
};

struct hsm_user_item {
	struct lu_fid	hui_fid;
	struct hsm_extent hui_extent;
} __packed;

struct hsm_user_request {
	struct hsm_request	hur_request;
	struct hsm_user_item	hur_user_item[0];
	/* extra data blob at end of struct (after all
	 * hur_user_items), only use helpers to access it
	 */
} __packed;

/** Return pointer to data field in a hsm user request */
static inline void *hur_data(struct hsm_user_request *hur)
{
	return &hur->hur_user_item[hur->hur_request.hr_itemcount];
}

/**
 * Compute the current length of the provided hsm_user_request.  This returns -1
 * instead of an errno because ssize_t is defined to be only [ -1, SSIZE_MAX ]
 *
 * return -1 on bounds check error.
 */
static inline ssize_t hur_len(struct hsm_user_request *hur)
{
	__u64	size;

	/* can't overflow a __u64 since hr_itemcount is only __u32 */
	size = offsetof(struct hsm_user_request, hur_user_item[0]) +
		(__u64)hur->hur_request.hr_itemcount *
		sizeof(hur->hur_user_item[0]) + hur->hur_request.hr_data_len;

	if (size != (ssize_t)size)
		return -1;

	return size;
}

/****** HSM RPCs to copytool *****/
/* Message types the copytool may receive */
enum hsm_message_type {
	HMT_ACTION_LIST = 100, /* message is a hsm_action_list */
};

/* Actions the copytool may be instructed to take for a given action_item */
enum hsm_copytool_action {
	HSMA_NONE    = 10, /* no action */
	HSMA_ARCHIVE = 20, /* arbitrary offset */
	HSMA_RESTORE = 21,
	HSMA_REMOVE  = 22,
	HSMA_CANCEL  = 23
};

static inline char *hsm_copytool_action2name(enum hsm_copytool_action  a)
{
	switch  (a) {
	case HSMA_NONE:    return "NOOP";
	case HSMA_ARCHIVE: return "ARCHIVE";
	case HSMA_RESTORE: return "RESTORE";
	case HSMA_REMOVE:  return "REMOVE";
	case HSMA_CANCEL:  return "CANCEL";
	default:	   return "UNKNOWN";
	}
}

/* Copytool item action description */
struct hsm_action_item {
	__u32      hai_len;     /* valid size of this struct */
	__u32      hai_action;  /* hsm_copytool_action, but use known size */
	struct lu_fid hai_fid;     /* Lustre FID to operated on */
	struct lu_fid hai_dfid;    /* fid used for data access */
	struct hsm_extent hai_extent;  /* byte range to operate on */
	__u64      hai_cookie;  /* action cookie from coordinator */
	__u64      hai_gid;     /* grouplock id */
	char       hai_data[0]; /* variable length */
} __packed;

/*
 * helper function which print in hexa the first bytes of
 * hai opaque field
 * \param hai [IN] record to print
 * \param buffer [OUT] output buffer
 * \param len [IN] max buffer len
 * \retval buffer
 */
static inline char *hai_dump_data_field(struct hsm_action_item *hai,
					char *buffer, size_t len)
{
	int i, data_len;
	char *ptr;

	ptr = buffer;
	data_len = hai->hai_len - sizeof(*hai);
	for (i = 0; (i < data_len) && (len > 2); i++) {
		snprintf(ptr, 3, "%02X", (unsigned char)hai->hai_data[i]);
		ptr += 2;
		len -= 2;
	}

	*ptr = '\0';

	return buffer;
}

/* Copytool action list */
#define HAL_VERSION 1
#define HAL_MAXSIZE LNET_MTU /* bytes, used in userspace only */
struct hsm_action_list {
	__u32 hal_version;
	__u32 hal_count;       /* number of hai's to follow */
	__u64 hal_compound_id; /* returned by coordinator */
	__u64 hal_flags;
	__u32 hal_archive_id; /* which archive backend */
	__u32 padding1;
	char  hal_fsname[0];   /* null-terminated */
	/* struct hsm_action_item[hal_count] follows, aligned on 8-byte
	 * boundaries. See hai_first
	 */
} __packed;

#ifndef HAVE_CFS_SIZE_ROUND
static inline int cfs_size_round(int val)
{
	return (val + 7) & (~0x7);
}

#define HAVE_CFS_SIZE_ROUND
#endif

/* Return pointer to first hai in action list */
static inline struct hsm_action_item *hai_first(struct hsm_action_list *hal)
{
	return (struct hsm_action_item *)(hal->hal_fsname +
					  cfs_size_round(strlen(hal-> \
								hal_fsname)
							 + 1));
}

/* Return pointer to next hai */
static inline struct hsm_action_item *hai_next(struct hsm_action_item *hai)
{
	return (struct hsm_action_item *)((char *)hai +
					  cfs_size_round(hai->hai_len));
}

/* Return size of an hsm_action_list */
static inline int hal_size(struct hsm_action_list *hal)
{
	int i, sz;
	struct hsm_action_item *hai;

	sz = sizeof(*hal) + cfs_size_round(strlen(hal->hal_fsname) + 1);
	hai = hai_first(hal);
	for (i = 0; i < hal->hal_count; i++, hai = hai_next(hai))
		sz += cfs_size_round(hai->hai_len);

	return sz;
}

/* HSM file import
 * describe the attributes to be set on imported file
 */
struct hsm_user_import {
	__u64		hui_size;
	__u64		hui_atime;
	__u64		hui_mtime;
	__u32		hui_atime_ns;
	__u32		hui_mtime_ns;
	__u32		hui_uid;
	__u32		hui_gid;
	__u32		hui_mode;
	__u32		hui_archive_id;
};

/* Copytool progress reporting */
#define HP_FLAG_COMPLETED 0x01
#define HP_FLAG_RETRY     0x02

struct hsm_progress {
	struct lu_fid		hp_fid;
	__u64			hp_cookie;
	struct hsm_extent	hp_extent;
	__u16			hp_flags;
	__u16			hp_errval; /* positive val */
	__u32			padding;
};

struct hsm_copy {
	__u64			hc_data_version;
	__u16			hc_flags;
	__u16			hc_errval; /* positive val */
	__u32			padding;
	struct hsm_action_item	hc_hai;
};

/** @} lustreuser */

#endif /* _LUSTRE_USER_H */