summaryrefslogtreecommitdiffstats
path: root/include/linux/nfs_xdr.h
blob: 72d5695c1b474d0e1e4abed1fd6ad2637d4dfa33 (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
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NFS_XDR_H
#define _LINUX_NFS_XDR_H

#include <linux/nfsacl.h>
#include <linux/sunrpc/gss_api.h>

/*
 * To change the maximum rsize and wsize supported by the NFS client, adjust
 * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
 * support a megabyte or more.  The default is left at 4096 bytes, which is
 * reasonable for NFS over UDP.
 */
#define NFS_MAX_FILE_IO_SIZE	(1048576U)
#define NFS_DEF_FILE_IO_SIZE	(4096U)
#define NFS_MIN_FILE_IO_SIZE	(1024U)

struct nfs4_string {
	unsigned int len;
	char *data;
};

struct nfs_fsid {
	uint64_t		major;
	uint64_t		minor;
};

/*
 * Helper for checking equality between 2 fsids.
 */
static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
{
	return a->major == b->major && a->minor == b->minor;
}

struct nfs4_threshold {
	__u32	bm;
	__u32	l_type;
	__u64	rd_sz;
	__u64	wr_sz;
	__u64	rd_io_sz;
	__u64	wr_io_sz;
};

struct nfs_fattr {
	unsigned int		valid;		/* which fields are valid */
	umode_t			mode;
	__u32			nlink;
	kuid_t			uid;
	kgid_t			gid;
	dev_t			rdev;
	__u64			size;
	union {
		struct {
			__u32	blocksize;
			__u32	blocks;
		} nfs2;
		struct {
			__u64	used;
		} nfs3;
	} du;
	struct nfs_fsid		fsid;
	__u64			fileid;
	__u64			mounted_on_fileid;
	struct timespec64	atime;
	struct timespec64	mtime;
	struct timespec64	ctime;
	__u64			change_attr;	/* NFSv4 change attribute */
	__u64			pre_change_attr;/* pre-op NFSv4 change attribute */
	__u64			pre_size;	/* pre_op_attr.size	  */
	struct timespec64	pre_mtime;	/* pre_op_attr.mtime	  */
	struct timespec64	pre_ctime;	/* pre_op_attr.ctime	  */
	unsigned long		time_start;
	unsigned long		gencount;
	struct nfs4_string	*owner_name;
	struct nfs4_string	*group_name;
	struct nfs4_threshold	*mdsthreshold;	/* pNFS threshold hints */
};

#define NFS_ATTR_FATTR_TYPE		(1U << 0)
#define NFS_ATTR_FATTR_MODE		(1U << 1)
#define NFS_ATTR_FATTR_NLINK		(1U << 2)
#define NFS_ATTR_FATTR_OWNER		(1U << 3)
#define NFS_ATTR_FATTR_GROUP		(1U << 4)
#define NFS_ATTR_FATTR_RDEV		(1U << 5)
#define NFS_ATTR_FATTR_SIZE		(1U << 6)
#define NFS_ATTR_FATTR_PRESIZE		(1U << 7)
#define NFS_ATTR_FATTR_BLOCKS_USED	(1U << 8)
#define NFS_ATTR_FATTR_SPACE_USED	(1U << 9)
#define NFS_ATTR_FATTR_FSID		(1U << 10)
#define NFS_ATTR_FATTR_FILEID		(1U << 11)
#define NFS_ATTR_FATTR_ATIME		(1U << 12)
#define NFS_ATTR_FATTR_MTIME		(1U << 13)
#define NFS_ATTR_FATTR_CTIME		(1U << 14)
#define NFS_ATTR_FATTR_PREMTIME		(1U << 15)
#define NFS_ATTR_FATTR_PRECTIME		(1U << 16)
#define NFS_ATTR_FATTR_CHANGE		(1U << 17)
#define NFS_ATTR_FATTR_PRECHANGE	(1U << 18)
#define NFS_ATTR_FATTR_V4_LOCATIONS	(1U << 19)
#define NFS_ATTR_FATTR_V4_REFERRAL	(1U << 20)
#define NFS_ATTR_FATTR_MOUNTPOINT	(1U << 21)
#define NFS_ATTR_FATTR_MOUNTED_ON_FILEID (1U << 22)
#define NFS_ATTR_FATTR_OWNER_NAME	(1U << 23)
#define NFS_ATTR_FATTR_GROUP_NAME	(1U << 24)
#define NFS_ATTR_FATTR_V4_SECURITY_LABEL (1U << 25)

#define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
		| NFS_ATTR_FATTR_MODE \
		| NFS_ATTR_FATTR_NLINK \
		| NFS_ATTR_FATTR_OWNER \
		| NFS_ATTR_FATTR_GROUP \
		| NFS_ATTR_FATTR_RDEV \
		| NFS_ATTR_FATTR_SIZE \
		| NFS_ATTR_FATTR_FSID \
		| NFS_ATTR_FATTR_FILEID \
		| NFS_ATTR_FATTR_ATIME \
		| NFS_ATTR_FATTR_MTIME \
		| NFS_ATTR_FATTR_CTIME \
		| NFS_ATTR_FATTR_CHANGE)
#define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \
		| NFS_ATTR_FATTR_BLOCKS_USED)
#define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
		| NFS_ATTR_FATTR_SPACE_USED)
#define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
		| NFS_ATTR_FATTR_SPACE_USED \
		| NFS_ATTR_FATTR_V4_SECURITY_LABEL)

/*
 * Maximal number of supported layout drivers.
 */
#define NFS_MAX_LAYOUT_TYPES 8

/*
 * Info on the file system
 */
struct nfs_fsinfo {
	struct nfs_fattr	*fattr; /* Post-op attributes */
	__u32			rtmax;	/* max.  read transfer size */
	__u32			rtpref;	/* pref. read transfer size */
	__u32			rtmult;	/* reads should be multiple of this */
	__u32			wtmax;	/* max.  write transfer size */
	__u32			wtpref;	/* pref. write transfer size */
	__u32			wtmult;	/* writes should be multiple of this */
	__u32			dtpref;	/* pref. readdir transfer size */
	__u64			maxfilesize;
	struct timespec64	time_delta; /* server time granularity */
	__u32			lease_time; /* in seconds */
	__u32			nlayouttypes; /* number of layouttypes */
	__u32			layouttype[NFS_MAX_LAYOUT_TYPES]; /* supported pnfs layout driver */
	__u32			blksize; /* preferred pnfs io block size */
	__u32			clone_blksize; /* granularity of a CLONE operation */
};

struct nfs_fsstat {
	struct nfs_fattr	*fattr; /* Post-op attributes */
	__u64			tbytes;	/* total size in bytes */
	__u64			fbytes;	/* # of free bytes */
	__u64			abytes;	/* # of bytes available to user */
	__u64			tfiles;	/* # of files */
	__u64			ffiles;	/* # of free files */
	__u64			afiles;	/* # of files available to user */
};

struct nfs2_fsstat {
	__u32			tsize;  /* Server transfer size */
	__u32			bsize;  /* Filesystem block size */
	__u32			blocks; /* No. of "bsize" blocks on filesystem */
	__u32			bfree;  /* No. of free "bsize" blocks */
	__u32			bavail; /* No. of available "bsize" blocks */
};

struct nfs_pathconf {
	struct nfs_fattr	*fattr; /* Post-op attributes */
	__u32			max_link; /* max # of hard links */
	__u32			max_namelen; /* max name length */
};

struct nfs4_change_info {
	u32			atomic;
	u64			before;
	u64			after;
};

struct nfs_seqid;

/* nfs41 sessions channel attributes */
struct nfs4_channel_attrs {
	u32			max_rqst_sz;
	u32			max_resp_sz;
	u32			max_resp_sz_cached;
	u32			max_ops;
	u32			max_reqs;
};

struct nfs4_slot;
struct nfs4_sequence_args {
	struct nfs4_slot	*sa_slot;
	u8			sa_cache_this : 1,
				sa_privileged : 1;
};

struct nfs4_sequence_res {
	struct nfs4_slot	*sr_slot;	/* slot used to send request */
	unsigned long		sr_timestamp;
	int			sr_status;	/* sequence operation status */
	u32			sr_status_flags;
	u32			sr_highest_slotid;
	u32			sr_target_highest_slotid;
};

struct nfs4_get_lease_time_args {
	struct nfs4_sequence_args	la_seq_args;
};

struct nfs4_get_lease_time_res {
	struct nfs4_sequence_res	lr_seq_res;
	struct nfs_fsinfo	       *lr_fsinfo;
};

struct xdr_stream;
struct nfs4_xdr_opaque_data;

struct nfs4_xdr_opaque_ops {
	void (*encode)(struct xdr_stream *, const void *args,
			const struct nfs4_xdr_opaque_data *);
	void (*free)(struct nfs4_xdr_opaque_data *);
};

struct nfs4_xdr_opaque_data {
	const struct nfs4_xdr_opaque_ops *ops;
	void *data;
};

#define PNFS_LAYOUT_MAXSIZE 4096

struct nfs4_layoutdriver_data {
	struct page **pages;
	__u32 pglen;
	__u32 len;
};

struct pnfs_layout_range {
	u32 iomode;
	u64 offset;
	u64 length;
};

struct nfs4_layoutget_args {
	struct nfs4_sequence_args seq_args;
	__u32 type;
	struct pnfs_layout_range range;
	__u64 minlength;
	__u32 maxcount;
	struct inode *inode;
	struct nfs_open_context *ctx;
	nfs4_stateid stateid;
	struct nfs4_layoutdriver_data layout;
};

struct nfs4_layoutget_res {
	struct nfs4_sequence_res seq_res;
	int status;
	__u32 return_on_close;
	struct pnfs_layout_range range;
	__u32 type;
	nfs4_stateid stateid;
	struct nfs4_layoutdriver_data *layoutp;
};

struct nfs4_layoutget {
	struct nfs4_layoutget_args args;
	struct nfs4_layoutget_res res;
	const struct cred *cred;
	gfp_t gfp_flags;
};

struct nfs4_getdeviceinfo_args {
	struct nfs4_sequence_args seq_args;
	struct pnfs_device *pdev;
	__u32 notify_types;
};

struct nfs4_getdeviceinfo_res {
	struct nfs4_sequence_res seq_res;
	struct pnfs_device *pdev;
	__u32 notification;
};

struct nfs4_layoutcommit_args {
	struct nfs4_sequence_args seq_args;
	nfs4_stateid stateid;
	__u64 lastbytewritten;
	struct inode *inode;
	const u32 *bitmask;
	size_t layoutupdate_len;
	struct page *layoutupdate_page;
	struct page **layoutupdate_pages;
	__be32 *start_p;
};

struct nfs4_layoutcommit_res {
	struct nfs4_sequence_res seq_res;
	struct nfs_fattr *fattr;
	const struct nfs_server *server;
	int status;
};

struct nfs4_layoutcommit_data {
	struct rpc_task task;
	struct nfs_fattr fattr;
	struct list_head lseg_list;
	const struct cred *cred;
	struct inode *inode;
	struct nfs4_layoutcommit_args args;
	struct nfs4_layoutcommit_res res;
};

struct nfs4_layoutreturn_args {
	struct nfs4_sequence_args seq_args;
	struct pnfs_layout_hdr *layout;
	struct inode *inode;
	struct pnfs_layout_range range;
	nfs4_stateid stateid;
	__u32   layout_type;
	struct nfs4_xdr_opaque_data *ld_private;
};

struct nfs4_layoutreturn_res {
	struct nfs4_sequence_res seq_res;
	u32 lrs_present;
	nfs4_stateid stateid;
};

struct nfs4_layoutreturn {
	struct nfs4_layoutreturn_args args;
	struct nfs4_layoutreturn_res res;
	const struct cred *cred;
	struct nfs_client *clp;
	struct inode *inode;
	int rpc_status;
	struct nfs4_xdr_opaque_data ld_private;
};

#define PNFS_LAYOUTSTATS_MAXSIZE 256

struct nfs42_layoutstat_args;
struct nfs42_layoutstat_devinfo;
typedef	void (*layoutstats_encode_t)(struct xdr_stream *,
		struct nfs42_layoutstat_args *,
		struct nfs42_layoutstat_devinfo *);

/* Per file per deviceid layoutstats */
struct nfs42_layoutstat_devinfo {
	struct nfs4_deviceid dev_id;
	__u64 offset;
	__u64 length;
	__u64 read_count;
	__u64 read_bytes;
	__u64 write_count;
	__u64 write_bytes;
	__u32 layout_type;
	struct nfs4_xdr_opaque_data ld_private;
};

struct nfs42_layoutstat_args {
	struct nfs4_sequence_args seq_args;
	struct nfs_fh *fh;
	struct inode *inode;
	nfs4_stateid stateid;
	int num_dev;
	struct nfs42_layoutstat_devinfo *devinfo;
};

struct nfs42_layoutstat_res {
	struct nfs4_sequence_res seq_res;
	int num_dev;
	int rpc_status;
};

struct nfs42_layoutstat_data {
	struct inode *inode;
	struct nfs42_layoutstat_args args;
	struct nfs42_layoutstat_res res;
};

struct nfs42_device_error {
	struct nfs4_deviceid dev_id;
	int status;
	enum nfs_opnum4 opnum;
};

struct nfs42_layout_error {
	__u64 offset;
	__u64 length;
	nfs4_stateid stateid;
	struct nfs42_device_error errors[1];
};

#define NFS42_LAYOUTERROR_MAX 5

struct nfs42_layouterror_args {
	struct nfs4_sequence_args seq_args;
	struct inode *inode;
	unsigned int num_errors;
	struct nfs42_layout_error errors[NFS42_LAYOUTERROR_MAX];
};

struct nfs42_layouterror_res {
	struct nfs4_sequence_res seq_res;
	unsigned int num_errors;
	int rpc_status;
};

struct nfs42_layouterror_data {
	struct nfs42_layouterror_args args;
	struct nfs42_layouterror_res res;
	struct inode *inode;
	struct pnfs_layout_segment *lseg;
};

struct nfs42_clone_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh			*src_fh;
	struct nfs_fh			*dst_fh;
	nfs4_stateid			src_stateid;
	nfs4_stateid			dst_stateid;
	__u64				src_offset;
	__u64				dst_offset;
	__u64				count;
	const u32			*dst_bitmask;
};

struct nfs42_clone_res {
	struct nfs4_sequence_res	seq_res;
	unsigned int			rpc_status;
	struct nfs_fattr		*dst_fattr;
	const struct nfs_server		*server;
};

struct stateowner_id {
	__u64	create_time;
	__u32	uniquifier;
};

/*
 * Arguments to the open call.
 */
struct nfs_openargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *	fh;
	struct nfs_seqid *	seqid;
	int			open_flags;
	fmode_t			fmode;
	u32			share_access;
	u32			access;
	__u64                   clientid;
	struct stateowner_id	id;
	union {
		struct {
			struct iattr *  attrs;    /* UNCHECKED, GUARDED, EXCLUSIVE4_1 */
			nfs4_verifier   verifier; /* EXCLUSIVE */
		};
		nfs4_stateid	delegation;		/* CLAIM_DELEGATE_CUR */
		fmode_t		delegation_type;	/* CLAIM_PREVIOUS */
	} u;
	const struct qstr *	name;
	const struct nfs_server *server;	 /* Needed for ID mapping */
	const u32 *		bitmask;
	const u32 *		open_bitmap;
	enum open_claim_type4	claim;
	enum createmode4	createmode;
	const struct nfs4_label *label;
	umode_t			umask;
	struct nfs4_layoutget_args *lg_args;
};

struct nfs_openres {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid            stateid;
	struct nfs_fh           fh;
	struct nfs4_change_info	cinfo;
	__u32                   rflags;
	struct nfs_fattr *      f_attr;
	struct nfs4_label	*f_label;
	struct nfs_seqid *	seqid;
	const struct nfs_server *server;
	fmode_t			delegation_type;
	nfs4_stateid		delegation;
	unsigned long		pagemod_limit;
	__u32			do_recall;
	__u32			attrset[NFS4_BITMAP_SIZE];
	struct nfs4_string	*owner;
	struct nfs4_string	*group_owner;
	__u32			access_request;
	__u32			access_supported;
	__u32			access_result;
	struct nfs4_layoutget_res *lg_res;
};

/*
 * Arguments to the open_confirm call.
 */
struct nfs_open_confirmargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *	fh;
	nfs4_stateid *		stateid;
	struct nfs_seqid *	seqid;
};

struct nfs_open_confirmres {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid            stateid;
	struct nfs_seqid *	seqid;
};

/*
 * Arguments to the close call.
 */
struct nfs_closeargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *         fh;
	nfs4_stateid 		stateid;
	struct nfs_seqid *	seqid;
	fmode_t			fmode;
	u32			share_access;
	const u32 *		bitmask;
	struct nfs4_layoutreturn_args *lr_args;
};

struct nfs_closeres {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid            stateid;
	struct nfs_fattr *	fattr;
	struct nfs_seqid *	seqid;
	const struct nfs_server *server;
	struct nfs4_layoutreturn_res *lr_res;
	int lr_ret;
};
/*
 *  * Arguments to the lock,lockt, and locku call.
 *   */
struct nfs_lowner {
	__u64			clientid;
	__u64			id;
	dev_t			s_dev;
};

struct nfs_lock_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct file_lock *	fl;
	struct nfs_seqid *	lock_seqid;
	nfs4_stateid		lock_stateid;
	struct nfs_seqid *	open_seqid;
	nfs4_stateid		open_stateid;
	struct nfs_lowner	lock_owner;
	unsigned char		block : 1;
	unsigned char		reclaim : 1;
	unsigned char		new_lock : 1;
	unsigned char		new_lock_owner : 1;
};

struct nfs_lock_res {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid		stateid;
	struct nfs_seqid *	lock_seqid;
	struct nfs_seqid *	open_seqid;
};

struct nfs_locku_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct file_lock *	fl;
	struct nfs_seqid *	seqid;
	nfs4_stateid 		stateid;
};

struct nfs_locku_res {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid		stateid;
	struct nfs_seqid *	seqid;
};

struct nfs_lockt_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct file_lock *	fl;
	struct nfs_lowner	lock_owner;
};

struct nfs_lockt_res {
	struct nfs4_sequence_res	seq_res;
	struct file_lock *	denied; /* LOCK, LOCKT failed */
};

struct nfs_release_lockowner_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_lowner	lock_owner;
};

struct nfs_release_lockowner_res {
	struct nfs4_sequence_res	seq_res;
};

struct nfs4_delegreturnargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *fhandle;
	const nfs4_stateid *stateid;
	const u32 * bitmask;
	struct nfs4_layoutreturn_args *lr_args;
};

struct nfs4_delegreturnres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr * fattr;
	struct nfs_server *server;
	struct nfs4_layoutreturn_res *lr_res;
	int lr_ret;
};

/*
 * Arguments to the write call.
 */
struct nfs_write_verifier {
	char			data[8];
};

struct nfs_writeverf {
	struct nfs_write_verifier verifier;
	enum nfs3_stable_how	committed;
};

/*
 * Arguments shared by the read and write call.
 */
struct nfs_pgio_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct nfs_open_context *context;
	struct nfs_lock_context *lock_context;
	nfs4_stateid		stateid;
	__u64			offset;
	__u32			count;
	unsigned int		pgbase;
	struct page **		pages;
	union {
		unsigned int		replen;			/* used by read */
		struct {
			const u32 *		bitmask;	/* used by write */
			enum nfs3_stable_how	stable;		/* used by write */
		};
	};
};

struct nfs_pgio_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr *	fattr;
	__u32			count;
	__u32			op_status;
	union {
		struct {
			unsigned int		replen;		/* used by read */
			int			eof;		/* used by read */
		};
		struct {
			struct nfs_writeverf *	verf;		/* used by write */
			const struct nfs_server *server;	/* used by write */
		};
	};
};

/*
 * Arguments to the commit call.
 */
struct nfs_commitargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh		*fh;
	__u64			offset;
	__u32			count;
	const u32		*bitmask;
};

struct nfs_commitres {
	struct nfs4_sequence_res	seq_res;
	__u32			op_status;
	struct nfs_fattr	*fattr;
	struct nfs_writeverf	*verf;
	const struct nfs_server *server;
};

/*
 * Common arguments to the unlink call
 */
struct nfs_removeargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh	*fh;
	struct qstr		name;
};

struct nfs_removeres {
	struct nfs4_sequence_res 	seq_res;
	struct nfs_server *server;
	struct nfs_fattr	*dir_attr;
	struct nfs4_change_info	cinfo;
};

/*
 * Common arguments to the rename call
 */
struct nfs_renameargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh		*old_dir;
	const struct nfs_fh		*new_dir;
	const struct qstr		*old_name;
	const struct qstr		*new_name;
};

struct nfs_renameres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_server		*server;
	struct nfs4_change_info		old_cinfo;
	struct nfs_fattr		*old_fattr;
	struct nfs4_change_info		new_cinfo;
	struct nfs_fattr		*new_fattr;
};

/* parsed sec= options */
#define NFS_AUTH_INFO_MAX_FLAVORS 12 /* see fs/nfs/super.c */
struct nfs_auth_info {
	unsigned int            flavor_len;
	rpc_authflavor_t        flavors[NFS_AUTH_INFO_MAX_FLAVORS];
};

/*
 * Argument struct for decode_entry function
 */
struct nfs_entry {
	__u64			ino;
	__u64			cookie,
				prev_cookie;
	const char *		name;
	unsigned int		len;
	int			eof;
	struct nfs_fh *		fh;
	struct nfs_fattr *	fattr;
	struct nfs4_label  *label;
	unsigned char		d_type;
	struct nfs_server *	server;
};

/*
 * The following types are for NFSv2 only.
 */
struct nfs_sattrargs {
	struct nfs_fh *		fh;
	struct iattr *		sattr;
};

struct nfs_diropargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
};

struct nfs_createargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	struct iattr *		sattr;
};

struct nfs_setattrargs {
	struct nfs4_sequence_args 	seq_args;
	struct nfs_fh *                 fh;
	nfs4_stateid                    stateid;
	struct iattr *                  iap;
	const struct nfs_server *	server; /* Needed for name mapping */
	const u32 *			bitmask;
	const struct nfs4_label		*label;
};

struct nfs_setaclargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *			fh;
	size_t				acl_len;
	struct page **			acl_pages;
};

struct nfs_setaclres {
	struct nfs4_sequence_res	seq_res;
};

struct nfs_getaclargs {
	struct nfs4_sequence_args 	seq_args;
	struct nfs_fh *			fh;
	size_t				acl_len;
	struct page **			acl_pages;
};

/* getxattr ACL interface flags */
#define NFS4_ACL_TRUNC		0x0001	/* ACL was truncated */
struct nfs_getaclres {
	struct nfs4_sequence_res	seq_res;
	size_t				acl_len;
	size_t				acl_data_offset;
	int				acl_flags;
	struct page *			acl_scratch;
};

struct nfs_setattrres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr *              fattr;
	struct nfs4_label		*label;
	const struct nfs_server *	server;
};

struct nfs_linkargs {
	struct nfs_fh *		fromfh;
	struct nfs_fh *		tofh;
	const char *		toname;
	unsigned int		tolen;
};

struct nfs_symlinkargs {
	struct nfs_fh *		fromfh;
	const char *		fromname;
	unsigned int		fromlen;
	struct page **		pages;
	unsigned int		pathlen;
	struct iattr *		sattr;
};

struct nfs_readdirargs {
	struct nfs_fh *		fh;
	__u32			cookie;
	unsigned int		count;
	struct page **		pages;
};

struct nfs3_getaclargs {
	struct nfs_fh *		fh;
	int			mask;
	struct page **		pages;
};

struct nfs3_setaclargs {
	struct inode *		inode;
	int			mask;
	struct posix_acl *	acl_access;
	struct posix_acl *	acl_default;
	size_t			len;
	unsigned int		npages;
	struct page **		pages;
};

struct nfs_diropok {
	struct nfs_fh *		fh;
	struct nfs_fattr *	fattr;
};

struct nfs_readlinkargs {
	struct nfs_fh *		fh;
	unsigned int		pgbase;
	unsigned int		pglen;
	struct page **		pages;
};

struct nfs3_sattrargs {
	struct nfs_fh *		fh;
	struct iattr *		sattr;
	unsigned int		guard;
	struct timespec64	guardtime;
};

struct nfs3_diropargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
};

struct nfs3_accessargs {
	struct nfs_fh *		fh;
	__u32			access;
};

struct nfs3_createargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	struct iattr *		sattr;
	enum nfs3_createmode	createmode;
	__be32			verifier[2];
};

struct nfs3_mkdirargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	struct iattr *		sattr;
};

struct nfs3_symlinkargs {
	struct nfs_fh *		fromfh;
	const char *		fromname;
	unsigned int		fromlen;
	struct page **		pages;
	unsigned int		pathlen;
	struct iattr *		sattr;
};

struct nfs3_mknodargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	enum nfs3_ftype		type;
	struct iattr *		sattr;
	dev_t			rdev;
};

struct nfs3_linkargs {
	struct nfs_fh *		fromfh;
	struct nfs_fh *		tofh;
	const char *		toname;
	unsigned int		tolen;
};

struct nfs3_readdirargs {
	struct nfs_fh *		fh;
	__u64			cookie;
	__be32			verf[2];
	bool			plus;
	unsigned int            count;
	struct page **		pages;
};

struct nfs3_diropres {
	struct nfs_fattr *	dir_attr;
	struct nfs_fh *		fh;
	struct nfs_fattr *	fattr;
};

struct nfs3_accessres {
	struct nfs_fattr *	fattr;
	__u32			access;
};

struct nfs3_readlinkargs {
	struct nfs_fh *		fh;
	unsigned int		pgbase;
	unsigned int		pglen;
	struct page **		pages;
};

struct nfs3_linkres {
	struct nfs_fattr *	dir_attr;
	struct nfs_fattr *	fattr;
};

struct nfs3_readdirres {
	struct nfs_fattr *	dir_attr;
	__be32 *		verf;
	bool			plus;
};

struct nfs3_getaclres {
	struct nfs_fattr *	fattr;
	int			mask;
	unsigned int		acl_access_count;
	unsigned int		acl_default_count;
	struct posix_acl *	acl_access;
	struct posix_acl *	acl_default;
};

#if IS_ENABLED(CONFIG_NFS_V4)

typedef u64 clientid4;

struct nfs4_accessargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
	u32				access;
};

struct nfs4_accessres {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	u32				supported;
	u32				access;
};

struct nfs4_create_arg {
	struct nfs4_sequence_args 	seq_args;
	u32				ftype;
	union {
		struct {
			struct page **	pages;
			unsigned int	len;
		} symlink;   /* NF4LNK */
		struct {
			u32		specdata1;
			u32		specdata2;
		} device;    /* NF4BLK, NF4CHR */
	} u;
	const struct qstr *		name;
	const struct nfs_server *	server;
	const struct iattr *		attrs;
	const struct nfs_fh *		dir_fh;
	const u32 *			bitmask;
	const struct nfs4_label		*label;
	umode_t				umask;
};

struct nfs4_create_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fh *			fh;
	struct nfs_fattr *		fattr;
	struct nfs4_label		*label;
	struct nfs4_change_info		dir_cinfo;
};

struct nfs4_fsinfo_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_fsinfo_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fsinfo	       *fsinfo;
};

struct nfs4_getattr_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_getattr_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	struct nfs4_label		*label;
};

struct nfs4_link_arg {
	struct nfs4_sequence_args 	seq_args;
	const struct nfs_fh *		fh;
	const struct nfs_fh *		dir_fh;
	const struct qstr *		name;
	const u32 *			bitmask;
};

struct nfs4_link_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	struct nfs4_label		*label;
	struct nfs4_change_info		cinfo;
	struct nfs_fattr *		dir_attr;
};

struct nfs4_lookup_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		dir_fh;
	const struct qstr *		name;
	const u32 *			bitmask;
};

struct nfs4_lookup_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	struct nfs_fh *			fh;
	struct nfs4_label		*label;
};

struct nfs4_lookupp_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh		*fh;
	const u32			*bitmask;
};

struct nfs4_lookupp_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server		*server;
	struct nfs_fattr		*fattr;
	struct nfs_fh			*fh;
	struct nfs4_label		*label;
};

struct nfs4_lookup_root_arg {
	struct nfs4_sequence_args	seq_args;
	const u32 *			bitmask;
};

struct nfs4_pathconf_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_pathconf_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_pathconf	       *pathconf;
};

struct nfs4_readdir_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	u64				cookie;
	nfs4_verifier			verifier;
	u32				count;
	struct page **			pages;	/* zero-copy data */
	unsigned int			pgbase;	/* zero-copy data */
	const u32 *			bitmask;
	bool				plus;
};

struct nfs4_readdir_res {
	struct nfs4_sequence_res	seq_res;
	nfs4_verifier			verifier;
	unsigned int			pgbase;
};

struct nfs4_readlink {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	unsigned int			pgbase;
	unsigned int			pglen;   /* zero-copy data */
	struct page **			pages;   /* zero-copy data */
};

struct nfs4_readlink_res {
	struct nfs4_sequence_res	seq_res;
};

struct nfs4_setclientid {
	const nfs4_verifier *		sc_verifier;
	u32				sc_prog;
	unsigned int			sc_netid_len;
	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
	unsigned int			sc_uaddr_len;
	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
	struct nfs_client		*sc_clnt;
	struct rpc_cred			*sc_cred;
};

struct nfs4_setclientid_res {
	u64				clientid;
	nfs4_verifier			confirm;
};

struct nfs4_statfs_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_statfs_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fsstat	       *fsstat;
};

struct nfs4_server_caps_arg {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh		       *fhandle;
	const u32 *			bitmask;
};

struct nfs4_server_caps_res {
	struct nfs4_sequence_res	seq_res;
	u32				attr_bitmask[3];
	u32				exclcreat_bitmask[3];
	u32				acl_bitmask;
	u32				has_links;
	u32				has_symlinks;
	u32				fh_expire_type;
};

#define NFS4_PATHNAME_MAXCOMPONENTS 512
struct nfs4_pathname {
	unsigned int ncomponents;
	struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
};

#define NFS4_FS_LOCATION_MAXSERVERS 10
struct nfs4_fs_location {
	unsigned int nservers;
	struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
	struct nfs4_pathname rootpath;
};

#define NFS4_FS_LOCATIONS_MAXENTRIES 10
struct nfs4_fs_locations {
	struct nfs_fattr fattr;
	const struct nfs_server *server;
	struct nfs4_pathname fs_path;
	int nlocations;
	struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
};

struct nfs4_fs_locations_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *dir_fh;
	const struct nfs_fh *fh;
	const struct qstr *name;
	struct page *page;
	const u32 *bitmask;
	clientid4 clientid;
	unsigned char migration:1, renew:1;
};

struct nfs4_fs_locations_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs4_fs_locations       *fs_locations;
	unsigned char			migration:1, renew:1;
};

struct nfs4_secinfo4 {
	u32			flavor;
	struct rpcsec_gss_info	flavor_info;
};

struct nfs4_secinfo_flavors {
	unsigned int		num_flavors;
	struct nfs4_secinfo4	flavors[0];
};

struct nfs4_secinfo_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh		*dir_fh;
	const struct qstr		*name;
};

struct nfs4_secinfo_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs4_secinfo_flavors	*flavors;
};

struct nfs4_fsid_present_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh		*fh;
	clientid4			clientid;
	unsigned char			renew:1;
};

struct nfs4_fsid_present_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fh			*fh;
	unsigned char			renew:1;
};

#endif /* CONFIG_NFS_V4 */

struct nfstime4 {
	u64	seconds;
	u32	nseconds;
};

#ifdef CONFIG_NFS_V4_1

struct pnfs_commit_bucket {
	struct list_head written;
	struct list_head committing;
	struct pnfs_layout_segment *wlseg;
	struct pnfs_layout_segment *clseg;
	struct nfs_writeverf direct_verf;
};

struct pnfs_ds_commit_info {
	int nwritten;
	int ncommitting;
	int nbuckets;
	struct pnfs_commit_bucket *buckets;
};

struct nfs41_state_protection {
	u32 how;
	struct nfs4_op_map enforce;
	struct nfs4_op_map allow;
};

struct nfs41_exchange_id_args {
	struct nfs_client		*client;
	nfs4_verifier			verifier;
	u32				flags;
	struct nfs41_state_protection	state_protect;
};

struct nfs41_server_owner {
	uint64_t			minor_id;
	uint32_t			major_id_sz;
	char				major_id[NFS4_OPAQUE_LIMIT];
};

struct nfs41_server_scope {
	uint32_t			server_scope_sz;
	char 				server_scope[NFS4_OPAQUE_LIMIT];
};

struct nfs41_impl_id {
	char				domain[NFS4_OPAQUE_LIMIT + 1];
	char				name[NFS4_OPAQUE_LIMIT + 1];
	struct nfstime4			date;
};

struct nfs41_bind_conn_to_session_args {
	struct nfs_client		*client;
	struct nfs4_sessionid		sessionid;
	u32				dir;
	bool				use_conn_in_rdma_mode;
};

struct nfs41_bind_conn_to_session_res {
	struct nfs4_sessionid		sessionid;
	u32				dir;
	bool				use_conn_in_rdma_mode;
};

struct nfs41_exchange_id_res {
	u64				clientid;
	u32				seqid;
	u32				flags;
	struct nfs41_server_owner	*server_owner;
	struct nfs41_server_scope	*server_scope;
	struct nfs41_impl_id		*impl_id;
	struct nfs41_state_protection	state_protect;
};

struct nfs41_create_session_args {
	struct nfs_client	       *client;
	u64				clientid;
	uint32_t			seqid;
	uint32_t			flags;
	uint32_t			cb_program;
	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
};

struct nfs41_create_session_res {
	struct nfs4_sessionid		sessionid;
	uint32_t			seqid;
	uint32_t			flags;
	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
};

struct nfs41_reclaim_complete_args {
	struct nfs4_sequence_args	seq_args;
	/* In the future extend to include curr_fh for use with migration */
	unsigned char			one_fs:1;
};

struct nfs41_reclaim_complete_res {
	struct nfs4_sequence_res	seq_res;
};

#define SECINFO_STYLE_CURRENT_FH 0
#define SECINFO_STYLE_PARENT 1
struct nfs41_secinfo_no_name_args {
	struct nfs4_sequence_args	seq_args;
	int				style;
};

struct nfs41_test_stateid_args {
	struct nfs4_sequence_args	seq_args;
	nfs4_stateid			*stateid;
};

struct nfs41_test_stateid_res {
	struct nfs4_sequence_res	seq_res;
	unsigned int			status;
};

struct nfs41_free_stateid_args {
	struct nfs4_sequence_args	seq_args;
	nfs4_stateid			stateid;
};

struct nfs41_free_stateid_res {
	struct nfs4_sequence_res	seq_res;
	unsigned int			status;
};

static inline void
nfs_free_pnfs_ds_cinfo(struct pnfs_ds_commit_info *cinfo)
{
	kfree(cinfo->buckets);
}

#else

struct pnfs_ds_commit_info {
};

static inline void
nfs_free_pnfs_ds_cinfo(struct pnfs_ds_commit_info *cinfo)
{
}

#endif /* CONFIG_NFS_V4_1 */

#ifdef CONFIG_NFS_V4_2
struct nfs42_falloc_args {
	struct nfs4_sequence_args	seq_args;

	struct nfs_fh			*falloc_fh;
	nfs4_stateid			 falloc_stateid;
	u64				 falloc_offset;
	u64				 falloc_length;
	const u32			*falloc_bitmask;
};

struct nfs42_falloc_res {
	struct nfs4_sequence_res	seq_res;
	unsigned int			status;

	struct nfs_fattr		*falloc_fattr;
	const struct nfs_server		*falloc_server;
};

struct nfs42_copy_args {
	struct nfs4_sequence_args	seq_args;

	struct nfs_fh			*src_fh;
	nfs4_stateid			src_stateid;
	u64				src_pos;

	struct nfs_fh			*dst_fh;
	nfs4_stateid			dst_stateid;
	u64				dst_pos;

	u64				count;
	bool				sync;
	struct nl4_server		*cp_src;
};

struct nfs42_write_res {
	nfs4_stateid		stateid;
	u64			count;
	struct nfs_writeverf	verifier;
};

struct nfs42_copy_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs42_write_res		write_res;
	bool				consecutive;
	bool				synchronous;
	struct nfs_commitres		commit_res;
};

struct nfs42_offload_status_args {
	struct nfs4_sequence_args	osa_seq_args;
	struct nfs_fh			*osa_src_fh;
	nfs4_stateid			osa_stateid;
};

struct nfs42_offload_status_res {
	struct nfs4_sequence_res	osr_seq_res;
	uint64_t			osr_count;
	int				osr_status;
};

struct nfs42_copy_notify_args {
	struct nfs4_sequence_args	cna_seq_args;

	struct nfs_fh		*cna_src_fh;
	nfs4_stateid		cna_src_stateid;
	struct nl4_server	cna_dst;
};

struct nfs42_copy_notify_res {
	struct nfs4_sequence_res	cnr_seq_res;

	struct nfstime4		cnr_lease_time;
	nfs4_stateid		cnr_stateid;
	struct nl4_server	cnr_src;
};

struct nfs42_seek_args {
	struct nfs4_sequence_args	seq_args;

	struct nfs_fh			*sa_fh;
	nfs4_stateid			sa_stateid;
	u64				sa_offset;
	u32				sa_what;
};

struct nfs42_seek_res {
	struct nfs4_sequence_res	seq_res;
	unsigned int			status;

	u32	sr_eof;
	u64	sr_offset;
};
#endif

struct nfs_page;

#define NFS_PAGEVEC_SIZE	(8U)

struct nfs_page_array {
	struct page		**pagevec;
	unsigned int		npages;		/* Max length of pagevec */
	struct page		*page_array[NFS_PAGEVEC_SIZE];
};

/* used as flag bits in nfs_pgio_header */
enum {
	NFS_IOHDR_ERROR = 0,
	NFS_IOHDR_EOF,
	NFS_IOHDR_REDO,
	NFS_IOHDR_STAT,
	NFS_IOHDR_RESEND_PNFS,
	NFS_IOHDR_RESEND_MDS,
};

struct nfs_io_completion;
struct nfs_pgio_header {
	struct inode		*inode;
	const struct cred		*cred;
	struct list_head	pages;
	struct nfs_page		*req;
	struct nfs_writeverf	verf;		/* Used for writes */
	fmode_t			rw_mode;
	struct pnfs_layout_segment *lseg;
	loff_t			io_start;
	const struct rpc_call_ops *mds_ops;
	void (*release) (struct nfs_pgio_header *hdr);
	const struct nfs_pgio_completion_ops *completion_ops;
	const struct nfs_rw_ops	*rw_ops;
	struct nfs_io_completion *io_completion;
	struct nfs_direct_req	*dreq;

	int			pnfs_error;
	int			error;		/* merge with pnfs_error */
	unsigned int		good_bytes;	/* boundary of good data */
	unsigned long		flags;

	/*
	 * rpc data
	 */
	struct rpc_task		task;
	struct nfs_fattr	fattr;
	struct nfs_pgio_args	args;		/* argument struct */
	struct nfs_pgio_res	res;		/* result struct */
	unsigned long		timestamp;	/* For lease renewal */
	int (*pgio_done_cb)(struct rpc_task *, struct nfs_pgio_header *);
	__u64			mds_offset;	/* Filelayout dense stripe */
	struct nfs_page_array	page_array;
	struct nfs_client	*ds_clp;	/* pNFS data server */
	int			ds_commit_idx;	/* ds index if ds_clp is set */
	int			pgio_mirror_idx;/* mirror index in pgio layer */
};

struct nfs_mds_commit_info {
	atomic_t rpcs_out;
	atomic_long_t		ncommit;
	struct list_head	list;
};

struct nfs_commit_info;
struct nfs_commit_data;
struct nfs_inode;
struct nfs_commit_completion_ops {
	void (*completion) (struct nfs_commit_data *data);
	void (*resched_write) (struct nfs_commit_info *, struct nfs_page *);
};

struct nfs_commit_info {
	struct inode 			*inode;	/* Needed for inode->i_lock */
	struct nfs_mds_commit_info	*mds;
	struct pnfs_ds_commit_info	*ds;
	struct nfs_direct_req		*dreq;	/* O_DIRECT request */
	const struct nfs_commit_completion_ops *completion_ops;
};

struct nfs_commit_data {
	struct rpc_task		task;
	struct inode		*inode;
	const struct cred		*cred;
	struct nfs_fattr	fattr;
	struct nfs_writeverf	verf;
	struct list_head	pages;		/* Coalesced requests we wish to flush */
	struct list_head	list;		/* lists of struct nfs_write_data */
	struct nfs_direct_req	*dreq;		/* O_DIRECT request */
	struct nfs_commitargs	args;		/* argument struct */
	struct nfs_commitres	res;		/* result struct */
	struct nfs_open_context *context;
	struct pnfs_layout_segment *lseg;
	struct nfs_client	*ds_clp;	/* pNFS data server */
	int			ds_commit_index;
	loff_t			lwb;
	const struct rpc_call_ops *mds_ops;
	const struct nfs_commit_completion_ops *completion_ops;
	int (*commit_done_cb) (struct rpc_task *task, struct nfs_commit_data *data);
	unsigned long		flags;
};

struct nfs_pgio_completion_ops {
	void	(*error_cleanup)(struct list_head *head, int);
	void	(*init_hdr)(struct nfs_pgio_header *hdr);
	void	(*completion)(struct nfs_pgio_header *hdr);
	void	(*reschedule_io)(struct nfs_pgio_header *hdr);
};

struct nfs_unlinkdata {
	struct nfs_removeargs args;
	struct nfs_removeres res;
	struct dentry *dentry;
	wait_queue_head_t wq;
	const struct cred *cred;
	struct nfs_fattr dir_attr;
	long timeout;
};

struct nfs_renamedata {
	struct nfs_renameargs	args;
	struct nfs_renameres	res;
	const struct cred	*cred;
	struct inode		*old_dir;
	struct dentry		*old_dentry;
	struct nfs_fattr	old_fattr;
	struct inode		*new_dir;
	struct dentry		*new_dentry;
	struct nfs_fattr	new_fattr;
	void (*complete)(struct rpc_task *, struct nfs_renamedata *);
	long timeout;
	bool cancelled;
};

struct nfs_access_entry;
struct nfs_client;
struct rpc_timeout;
struct nfs_subversion;
struct nfs_mount_info;
struct nfs_client_initdata;
struct nfs_pageio_descriptor;

/*
 * RPC procedure vector for NFSv2/NFSv3 demuxing
 */
struct nfs_rpc_ops {
	u32	version;		/* Protocol version */
	const struct dentry_operations *dentry_ops;
	const struct inode_operations *dir_inode_ops;
	const struct inode_operations *file_inode_ops;
	const struct file_operations *file_ops;
	const struct nlmclnt_operations *nlmclnt_ops;

	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
			    struct nfs_fsinfo *);
	struct vfsmount *(*submount) (struct nfs_server *, struct dentry *,
				      struct nfs_fh *, struct nfs_fattr *);
	struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *,
				     struct nfs_subversion *);
	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
			    struct nfs_fattr *, struct nfs4_label *,
			    struct inode *);
	int	(*setattr) (struct dentry *, struct nfs_fattr *,
			    struct iattr *);
	int	(*lookup)  (struct inode *, const struct qstr *,
			    struct nfs_fh *, struct nfs_fattr *,
			    struct nfs4_label *);
	int	(*lookupp) (struct inode *, struct nfs_fh *,
			    struct nfs_fattr *, struct nfs4_label *);
	int	(*access)  (struct inode *, struct nfs_access_entry *);
	int	(*readlink)(struct inode *, struct page *, unsigned int,
			    unsigned int);
	int	(*create)  (struct inode *, struct dentry *,
			    struct iattr *, int);
	int	(*remove)  (struct inode *, struct dentry *);
	void	(*unlink_setup)  (struct rpc_message *, struct dentry *, struct inode *);
	void	(*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
	int	(*unlink_done) (struct rpc_task *, struct inode *);
	void	(*rename_setup)  (struct rpc_message *msg,
			struct dentry *old_dentry,
			struct dentry *new_dentry);
	void	(*rename_rpc_prepare)(struct rpc_task *task, struct nfs_renamedata *);
	int	(*rename_done) (struct rpc_task *task, struct inode *old_dir, struct inode *new_dir);
	int	(*link)    (struct inode *, struct inode *, const struct qstr *);
	int	(*symlink) (struct inode *, struct dentry *, struct page *,
			    unsigned int, struct iattr *);
	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
	int	(*rmdir)   (struct inode *, const struct qstr *);
	int	(*readdir) (struct dentry *, const struct cred *,
			    u64, struct page **, unsigned int, bool);
	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
			    dev_t);
	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
			    struct nfs_fsstat *);
	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,
			    struct nfs_fsinfo *);
	int	(*pathconf) (struct nfs_server *, struct nfs_fh *,
			     struct nfs_pathconf *);
	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
	int	(*decode_dirent)(struct xdr_stream *, struct nfs_entry *, bool);
	int	(*pgio_rpc_prepare)(struct rpc_task *,
				    struct nfs_pgio_header *);
	void	(*read_setup)(struct nfs_pgio_header *, struct rpc_message *);
	int	(*read_done)(struct rpc_task *, struct nfs_pgio_header *);
	void	(*write_setup)(struct nfs_pgio_header *, struct rpc_message *,
				struct rpc_clnt **);
	int	(*write_done)(struct rpc_task *, struct nfs_pgio_header *);
	void	(*commit_setup) (struct nfs_commit_data *, struct rpc_message *,
				struct rpc_clnt **);
	void	(*commit_rpc_prepare)(struct rpc_task *, struct nfs_commit_data *);
	int	(*commit_done) (struct rpc_task *, struct nfs_commit_data *);
	int	(*lock)(struct file *, int, struct file_lock *);
	int	(*lock_check_bounds)(const struct file_lock *);
	void	(*clear_acl_cache)(struct inode *);
	void	(*close_context)(struct nfs_open_context *ctx, int);
	struct inode * (*open_context) (struct inode *dir,
				struct nfs_open_context *ctx,
				int open_flags,
				struct iattr *iattr,
				int *);
	int (*have_delegation)(struct inode *, fmode_t);
	struct nfs_client *(*alloc_client) (const struct nfs_client_initdata *);
	struct nfs_client *(*init_client) (struct nfs_client *,
				const struct nfs_client_initdata *);
	void	(*free_client) (struct nfs_client *);
	struct nfs_server *(*create_server)(struct nfs_mount_info *, struct nfs_subversion *);
	struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *,
					   struct nfs_fattr *, rpc_authflavor_t);
};

/*
 * 	NFS_CALL(getattr, inode, (fattr));
 * into
 *	NFS_PROTO(inode)->getattr(fattr);
 */
#define NFS_CALL(op, inode, args)	NFS_PROTO(inode)->op args

/*
 * Function vectors etc. for the NFS client
 */
extern const struct nfs_rpc_ops	nfs_v2_clientops;
extern const struct nfs_rpc_ops	nfs_v3_clientops;
extern const struct nfs_rpc_ops	nfs_v4_clientops;
extern const struct rpc_version nfs_version2;
extern const struct rpc_version nfs_version3;
extern const struct rpc_version nfs_version4;

extern const struct rpc_version nfsacl_version3;
extern const struct rpc_program nfsacl_program;

#endif