1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_NFS_XDR_H
3 #define _LINUX_NFS_XDR_H
4 
5 #include <linux/nfsacl.h>
6 #include <linux/sunrpc/gss_api.h>
7 
8 /*
9  * To change the maximum rsize and wsize supported by the NFS client, adjust
10  * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
11  * support a megabyte or more.  The default is left at 4096 bytes, which is
12  * reasonable for NFS over UDP.
13  */
14 #define NFS_MAX_FILE_IO_SIZE	(1048576U)
15 #define NFS_DEF_FILE_IO_SIZE	(4096U)
16 #define NFS_MIN_FILE_IO_SIZE	(1024U)
17 
18 #define NFS_BITMASK_SZ		3
19 
20 struct nfs4_string {
21 	unsigned int len;
22 	char *data;
23 };
24 
25 struct nfs_fsid {
26 	uint64_t		major;
27 	uint64_t		minor;
28 };
29 
30 /*
31  * Helper for checking equality between 2 fsids.
32  */
nfs_fsid_equal(const struct nfs_fsid * a,const struct nfs_fsid * b)33 static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
34 {
35 	return a->major == b->major && a->minor == b->minor;
36 }
37 
38 struct nfs4_threshold {
39 	__u32	bm;
40 	__u32	l_type;
41 	__u64	rd_sz;
42 	__u64	wr_sz;
43 	__u64	rd_io_sz;
44 	__u64	wr_io_sz;
45 };
46 
47 struct nfs_fattr {
48 	unsigned int		valid;		/* which fields are valid */
49 	umode_t			mode;
50 	__u32			nlink;
51 	kuid_t			uid;
52 	kgid_t			gid;
53 	dev_t			rdev;
54 	__u64			size;
55 	union {
56 		struct {
57 			__u32	blocksize;
58 			__u32	blocks;
59 		} nfs2;
60 		struct {
61 			__u64	used;
62 		} nfs3;
63 	} du;
64 	struct nfs_fsid		fsid;
65 	__u64			fileid;
66 	__u64			mounted_on_fileid;
67 	struct timespec64	atime;
68 	struct timespec64	mtime;
69 	struct timespec64	ctime;
70 	__u64			change_attr;	/* NFSv4 change attribute */
71 	__u64			pre_change_attr;/* pre-op NFSv4 change attribute */
72 	__u64			pre_size;	/* pre_op_attr.size	  */
73 	struct timespec64	pre_mtime;	/* pre_op_attr.mtime	  */
74 	struct timespec64	pre_ctime;	/* pre_op_attr.ctime	  */
75 	unsigned long		time_start;
76 	unsigned long		gencount;
77 	struct nfs4_string	*owner_name;
78 	struct nfs4_string	*group_name;
79 	struct nfs4_threshold	*mdsthreshold;	/* pNFS threshold hints */
80 	struct nfs4_label	*label;
81 };
82 
83 #define NFS_ATTR_FATTR_TYPE		(1U << 0)
84 #define NFS_ATTR_FATTR_MODE		(1U << 1)
85 #define NFS_ATTR_FATTR_NLINK		(1U << 2)
86 #define NFS_ATTR_FATTR_OWNER		(1U << 3)
87 #define NFS_ATTR_FATTR_GROUP		(1U << 4)
88 #define NFS_ATTR_FATTR_RDEV		(1U << 5)
89 #define NFS_ATTR_FATTR_SIZE		(1U << 6)
90 #define NFS_ATTR_FATTR_PRESIZE		(1U << 7)
91 #define NFS_ATTR_FATTR_BLOCKS_USED	(1U << 8)
92 #define NFS_ATTR_FATTR_SPACE_USED	(1U << 9)
93 #define NFS_ATTR_FATTR_FSID		(1U << 10)
94 #define NFS_ATTR_FATTR_FILEID		(1U << 11)
95 #define NFS_ATTR_FATTR_ATIME		(1U << 12)
96 #define NFS_ATTR_FATTR_MTIME		(1U << 13)
97 #define NFS_ATTR_FATTR_CTIME		(1U << 14)
98 #define NFS_ATTR_FATTR_PREMTIME		(1U << 15)
99 #define NFS_ATTR_FATTR_PRECTIME		(1U << 16)
100 #define NFS_ATTR_FATTR_CHANGE		(1U << 17)
101 #define NFS_ATTR_FATTR_PRECHANGE	(1U << 18)
102 #define NFS_ATTR_FATTR_V4_LOCATIONS	(1U << 19)
103 #define NFS_ATTR_FATTR_V4_REFERRAL	(1U << 20)
104 #define NFS_ATTR_FATTR_MOUNTPOINT	(1U << 21)
105 #define NFS_ATTR_FATTR_MOUNTED_ON_FILEID (1U << 22)
106 #define NFS_ATTR_FATTR_OWNER_NAME	(1U << 23)
107 #define NFS_ATTR_FATTR_GROUP_NAME	(1U << 24)
108 #define NFS_ATTR_FATTR_V4_SECURITY_LABEL (1U << 25)
109 
110 #define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
111 		| NFS_ATTR_FATTR_MODE \
112 		| NFS_ATTR_FATTR_NLINK \
113 		| NFS_ATTR_FATTR_OWNER \
114 		| NFS_ATTR_FATTR_GROUP \
115 		| NFS_ATTR_FATTR_RDEV \
116 		| NFS_ATTR_FATTR_SIZE \
117 		| NFS_ATTR_FATTR_FSID \
118 		| NFS_ATTR_FATTR_FILEID \
119 		| NFS_ATTR_FATTR_ATIME \
120 		| NFS_ATTR_FATTR_MTIME \
121 		| NFS_ATTR_FATTR_CTIME \
122 		| NFS_ATTR_FATTR_CHANGE)
123 #define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \
124 		| NFS_ATTR_FATTR_BLOCKS_USED)
125 #define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
126 		| NFS_ATTR_FATTR_SPACE_USED)
127 #define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
128 		| NFS_ATTR_FATTR_SPACE_USED \
129 		| NFS_ATTR_FATTR_V4_SECURITY_LABEL)
130 
131 /*
132  * Maximal number of supported layout drivers.
133  */
134 #define NFS_MAX_LAYOUT_TYPES 8
135 
136 /*
137  * Info on the file system
138  */
139 struct nfs_fsinfo {
140 	struct nfs_fattr	*fattr; /* Post-op attributes */
141 	__u32			rtmax;	/* max.  read transfer size */
142 	__u32			rtpref;	/* pref. read transfer size */
143 	__u32			rtmult;	/* reads should be multiple of this */
144 	__u32			wtmax;	/* max.  write transfer size */
145 	__u32			wtpref;	/* pref. write transfer size */
146 	__u32			wtmult;	/* writes should be multiple of this */
147 	__u32			dtpref;	/* pref. readdir transfer size */
148 	__u64			maxfilesize;
149 	struct timespec64	time_delta; /* server time granularity */
150 	__u32			lease_time; /* in seconds */
151 	__u32			nlayouttypes; /* number of layouttypes */
152 	__u32			layouttype[NFS_MAX_LAYOUT_TYPES]; /* supported pnfs layout driver */
153 	__u32			blksize; /* preferred pnfs io block size */
154 	__u32			clone_blksize; /* granularity of a CLONE operation */
155 	enum nfs4_change_attr_type
156 				change_attr_type; /* Info about change attr */
157 	__u32			xattr_support; /* User xattrs supported */
158 };
159 
160 struct nfs_fsstat {
161 	struct nfs_fattr	*fattr; /* Post-op attributes */
162 	__u64			tbytes;	/* total size in bytes */
163 	__u64			fbytes;	/* # of free bytes */
164 	__u64			abytes;	/* # of bytes available to user */
165 	__u64			tfiles;	/* # of files */
166 	__u64			ffiles;	/* # of free files */
167 	__u64			afiles;	/* # of files available to user */
168 };
169 
170 struct nfs2_fsstat {
171 	__u32			tsize;  /* Server transfer size */
172 	__u32			bsize;  /* Filesystem block size */
173 	__u32			blocks; /* No. of "bsize" blocks on filesystem */
174 	__u32			bfree;  /* No. of free "bsize" blocks */
175 	__u32			bavail; /* No. of available "bsize" blocks */
176 };
177 
178 struct nfs_pathconf {
179 	struct nfs_fattr	*fattr; /* Post-op attributes */
180 	__u32			max_link; /* max # of hard links */
181 	__u32			max_namelen; /* max name length */
182 };
183 
184 struct nfs4_change_info {
185 	u32			atomic;
186 	u64			before;
187 	u64			after;
188 };
189 
190 struct nfs_seqid;
191 
192 /* nfs41 sessions channel attributes */
193 struct nfs4_channel_attrs {
194 	u32			max_rqst_sz;
195 	u32			max_resp_sz;
196 	u32			max_resp_sz_cached;
197 	u32			max_ops;
198 	u32			max_reqs;
199 };
200 
201 struct nfs4_slot;
202 struct nfs4_sequence_args {
203 	struct nfs4_slot	*sa_slot;
204 	u8			sa_cache_this : 1,
205 				sa_privileged : 1;
206 };
207 
208 struct nfs4_sequence_res {
209 	struct nfs4_slot	*sr_slot;	/* slot used to send request */
210 	unsigned long		sr_timestamp;
211 	int			sr_status;	/* sequence operation status */
212 	u32			sr_status_flags;
213 	u32			sr_highest_slotid;
214 	u32			sr_target_highest_slotid;
215 };
216 
217 struct nfs4_get_lease_time_args {
218 	struct nfs4_sequence_args	la_seq_args;
219 };
220 
221 struct nfs4_get_lease_time_res {
222 	struct nfs4_sequence_res	lr_seq_res;
223 	struct nfs_fsinfo	       *lr_fsinfo;
224 };
225 
226 struct xdr_stream;
227 struct nfs4_xdr_opaque_data;
228 
229 struct nfs4_xdr_opaque_ops {
230 	void (*encode)(struct xdr_stream *, const void *args,
231 			const struct nfs4_xdr_opaque_data *);
232 	void (*free)(struct nfs4_xdr_opaque_data *);
233 };
234 
235 struct nfs4_xdr_opaque_data {
236 	const struct nfs4_xdr_opaque_ops *ops;
237 	void *data;
238 };
239 
240 #define PNFS_LAYOUT_MAXSIZE 4096
241 
242 struct nfs4_layoutdriver_data {
243 	struct page **pages;
244 	__u32 pglen;
245 	__u32 len;
246 };
247 
248 struct pnfs_layout_range {
249 	u32 iomode;
250 	u64 offset;
251 	u64 length;
252 };
253 
254 struct nfs4_layoutget_args {
255 	struct nfs4_sequence_args seq_args;
256 	__u32 type;
257 	struct pnfs_layout_range range;
258 	__u64 minlength;
259 	__u32 maxcount;
260 	struct inode *inode;
261 	struct nfs_open_context *ctx;
262 	nfs4_stateid stateid;
263 	struct nfs4_layoutdriver_data layout;
264 };
265 
266 struct nfs4_layoutget_res {
267 	struct nfs4_sequence_res seq_res;
268 	int status;
269 	__u32 return_on_close;
270 	struct pnfs_layout_range range;
271 	__u32 type;
272 	nfs4_stateid stateid;
273 	struct nfs4_layoutdriver_data *layoutp;
274 };
275 
276 struct nfs4_layoutget {
277 	struct nfs4_layoutget_args args;
278 	struct nfs4_layoutget_res res;
279 	const struct cred *cred;
280 	struct pnfs_layout_hdr *lo;
281 	gfp_t gfp_flags;
282 };
283 
284 struct nfs4_getdeviceinfo_args {
285 	struct nfs4_sequence_args seq_args;
286 	struct pnfs_device *pdev;
287 	__u32 notify_types;
288 };
289 
290 struct nfs4_getdeviceinfo_res {
291 	struct nfs4_sequence_res seq_res;
292 	struct pnfs_device *pdev;
293 	__u32 notification;
294 };
295 
296 struct nfs4_layoutcommit_args {
297 	struct nfs4_sequence_args seq_args;
298 	nfs4_stateid stateid;
299 	__u64 lastbytewritten;
300 	struct inode *inode;
301 	const u32 *bitmask;
302 	size_t layoutupdate_len;
303 	struct page *layoutupdate_page;
304 	struct page **layoutupdate_pages;
305 	__be32 *start_p;
306 };
307 
308 struct nfs4_layoutcommit_res {
309 	struct nfs4_sequence_res seq_res;
310 	struct nfs_fattr *fattr;
311 	const struct nfs_server *server;
312 	int status;
313 };
314 
315 struct nfs4_layoutcommit_data {
316 	struct rpc_task task;
317 	struct nfs_fattr fattr;
318 	struct list_head lseg_list;
319 	const struct cred *cred;
320 	struct inode *inode;
321 	struct nfs4_layoutcommit_args args;
322 	struct nfs4_layoutcommit_res res;
323 };
324 
325 struct nfs4_layoutreturn_args {
326 	struct nfs4_sequence_args seq_args;
327 	struct pnfs_layout_hdr *layout;
328 	struct inode *inode;
329 	struct pnfs_layout_range range;
330 	nfs4_stateid stateid;
331 	__u32   layout_type;
332 	struct nfs4_xdr_opaque_data *ld_private;
333 };
334 
335 struct nfs4_layoutreturn_res {
336 	struct nfs4_sequence_res seq_res;
337 	u32 lrs_present;
338 	nfs4_stateid stateid;
339 };
340 
341 struct nfs4_layoutreturn {
342 	struct nfs4_layoutreturn_args args;
343 	struct nfs4_layoutreturn_res res;
344 	const struct cred *cred;
345 	struct nfs_client *clp;
346 	struct inode *inode;
347 	int rpc_status;
348 	struct nfs4_xdr_opaque_data ld_private;
349 };
350 
351 #define PNFS_LAYOUTSTATS_MAXSIZE 256
352 
353 struct nfs42_layoutstat_args;
354 struct nfs42_layoutstat_devinfo;
355 typedef	void (*layoutstats_encode_t)(struct xdr_stream *,
356 		struct nfs42_layoutstat_args *,
357 		struct nfs42_layoutstat_devinfo *);
358 
359 /* Per file per deviceid layoutstats */
360 struct nfs42_layoutstat_devinfo {
361 	struct nfs4_deviceid dev_id;
362 	__u64 offset;
363 	__u64 length;
364 	__u64 read_count;
365 	__u64 read_bytes;
366 	__u64 write_count;
367 	__u64 write_bytes;
368 	__u32 layout_type;
369 	struct nfs4_xdr_opaque_data ld_private;
370 };
371 
372 struct nfs42_layoutstat_args {
373 	struct nfs4_sequence_args seq_args;
374 	struct nfs_fh *fh;
375 	struct inode *inode;
376 	nfs4_stateid stateid;
377 	int num_dev;
378 	struct nfs42_layoutstat_devinfo *devinfo;
379 };
380 
381 struct nfs42_layoutstat_res {
382 	struct nfs4_sequence_res seq_res;
383 	int num_dev;
384 	int rpc_status;
385 };
386 
387 struct nfs42_layoutstat_data {
388 	struct inode *inode;
389 	struct nfs42_layoutstat_args args;
390 	struct nfs42_layoutstat_res res;
391 };
392 
393 struct nfs42_device_error {
394 	struct nfs4_deviceid dev_id;
395 	int status;
396 	enum nfs_opnum4 opnum;
397 };
398 
399 struct nfs42_layout_error {
400 	__u64 offset;
401 	__u64 length;
402 	nfs4_stateid stateid;
403 	struct nfs42_device_error errors[1];
404 };
405 
406 #define NFS42_LAYOUTERROR_MAX 5
407 
408 struct nfs42_layouterror_args {
409 	struct nfs4_sequence_args seq_args;
410 	struct inode *inode;
411 	unsigned int num_errors;
412 	struct nfs42_layout_error errors[NFS42_LAYOUTERROR_MAX];
413 };
414 
415 struct nfs42_layouterror_res {
416 	struct nfs4_sequence_res seq_res;
417 	unsigned int num_errors;
418 	int rpc_status;
419 };
420 
421 struct nfs42_layouterror_data {
422 	struct nfs42_layouterror_args args;
423 	struct nfs42_layouterror_res res;
424 	struct inode *inode;
425 	struct pnfs_layout_segment *lseg;
426 };
427 
428 struct nfs42_clone_args {
429 	struct nfs4_sequence_args	seq_args;
430 	struct nfs_fh			*src_fh;
431 	struct nfs_fh			*dst_fh;
432 	nfs4_stateid			src_stateid;
433 	nfs4_stateid			dst_stateid;
434 	__u64				src_offset;
435 	__u64				dst_offset;
436 	__u64				count;
437 	const u32			*dst_bitmask;
438 };
439 
440 struct nfs42_clone_res {
441 	struct nfs4_sequence_res	seq_res;
442 	unsigned int			rpc_status;
443 	struct nfs_fattr		*dst_fattr;
444 	const struct nfs_server		*server;
445 };
446 
447 struct stateowner_id {
448 	__u64	create_time;
449 	__u32	uniquifier;
450 };
451 
452 /*
453  * Arguments to the open call.
454  */
455 struct nfs_openargs {
456 	struct nfs4_sequence_args	seq_args;
457 	const struct nfs_fh *	fh;
458 	struct nfs_seqid *	seqid;
459 	int			open_flags;
460 	fmode_t			fmode;
461 	u32			share_access;
462 	u32			access;
463 	__u64                   clientid;
464 	struct stateowner_id	id;
465 	union {
466 		struct {
467 			struct iattr *  attrs;    /* UNCHECKED, GUARDED, EXCLUSIVE4_1 */
468 			nfs4_verifier   verifier; /* EXCLUSIVE */
469 		};
470 		nfs4_stateid	delegation;		/* CLAIM_DELEGATE_CUR */
471 		fmode_t		delegation_type;	/* CLAIM_PREVIOUS */
472 	} u;
473 	const struct qstr *	name;
474 	const struct nfs_server *server;	 /* Needed for ID mapping */
475 	const u32 *		bitmask;
476 	const u32 *		open_bitmap;
477 	enum open_claim_type4	claim;
478 	enum createmode4	createmode;
479 	const struct nfs4_label *label;
480 	umode_t			umask;
481 	struct nfs4_layoutget_args *lg_args;
482 };
483 
484 struct nfs_openres {
485 	struct nfs4_sequence_res	seq_res;
486 	nfs4_stateid            stateid;
487 	struct nfs_fh           fh;
488 	struct nfs4_change_info	cinfo;
489 	__u32                   rflags;
490 	struct nfs_fattr *      f_attr;
491 	struct nfs_seqid *	seqid;
492 	const struct nfs_server *server;
493 	fmode_t			delegation_type;
494 	nfs4_stateid		delegation;
495 	unsigned long		pagemod_limit;
496 	__u32			do_recall;
497 	__u32			attrset[NFS4_BITMAP_SIZE];
498 	struct nfs4_string	*owner;
499 	struct nfs4_string	*group_owner;
500 	__u32			access_request;
501 	__u32			access_supported;
502 	__u32			access_result;
503 	struct nfs4_layoutget_res *lg_res;
504 };
505 
506 /*
507  * Arguments to the open_confirm call.
508  */
509 struct nfs_open_confirmargs {
510 	struct nfs4_sequence_args	seq_args;
511 	const struct nfs_fh *	fh;
512 	nfs4_stateid *		stateid;
513 	struct nfs_seqid *	seqid;
514 };
515 
516 struct nfs_open_confirmres {
517 	struct nfs4_sequence_res	seq_res;
518 	nfs4_stateid            stateid;
519 	struct nfs_seqid *	seqid;
520 };
521 
522 /*
523  * Arguments to the close call.
524  */
525 struct nfs_closeargs {
526 	struct nfs4_sequence_args	seq_args;
527 	struct nfs_fh *         fh;
528 	nfs4_stateid 		stateid;
529 	struct nfs_seqid *	seqid;
530 	fmode_t			fmode;
531 	u32			share_access;
532 	const u32 *		bitmask;
533 	u32			bitmask_store[NFS_BITMASK_SZ];
534 	struct nfs4_layoutreturn_args *lr_args;
535 };
536 
537 struct nfs_closeres {
538 	struct nfs4_sequence_res	seq_res;
539 	nfs4_stateid            stateid;
540 	struct nfs_fattr *	fattr;
541 	struct nfs_seqid *	seqid;
542 	const struct nfs_server *server;
543 	struct nfs4_layoutreturn_res *lr_res;
544 	int lr_ret;
545 };
546 /*
547  *  * Arguments to the lock,lockt, and locku call.
548  *   */
549 struct nfs_lowner {
550 	__u64			clientid;
551 	__u64			id;
552 	dev_t			s_dev;
553 };
554 
555 struct nfs_lock_args {
556 	struct nfs4_sequence_args	seq_args;
557 	struct nfs_fh *		fh;
558 	struct file_lock *	fl;
559 	struct nfs_seqid *	lock_seqid;
560 	nfs4_stateid		lock_stateid;
561 	struct nfs_seqid *	open_seqid;
562 	nfs4_stateid		open_stateid;
563 	struct nfs_lowner	lock_owner;
564 	unsigned char		block : 1;
565 	unsigned char		reclaim : 1;
566 	unsigned char		new_lock : 1;
567 	unsigned char		new_lock_owner : 1;
568 };
569 
570 struct nfs_lock_res {
571 	struct nfs4_sequence_res	seq_res;
572 	nfs4_stateid		stateid;
573 	struct nfs_seqid *	lock_seqid;
574 	struct nfs_seqid *	open_seqid;
575 };
576 
577 struct nfs_locku_args {
578 	struct nfs4_sequence_args	seq_args;
579 	struct nfs_fh *		fh;
580 	struct file_lock *	fl;
581 	struct nfs_seqid *	seqid;
582 	nfs4_stateid 		stateid;
583 };
584 
585 struct nfs_locku_res {
586 	struct nfs4_sequence_res	seq_res;
587 	nfs4_stateid		stateid;
588 	struct nfs_seqid *	seqid;
589 };
590 
591 struct nfs_lockt_args {
592 	struct nfs4_sequence_args	seq_args;
593 	struct nfs_fh *		fh;
594 	struct file_lock *	fl;
595 	struct nfs_lowner	lock_owner;
596 };
597 
598 struct nfs_lockt_res {
599 	struct nfs4_sequence_res	seq_res;
600 	struct file_lock *	denied; /* LOCK, LOCKT failed */
601 };
602 
603 struct nfs_release_lockowner_args {
604 	struct nfs4_sequence_args	seq_args;
605 	struct nfs_lowner	lock_owner;
606 };
607 
608 struct nfs_release_lockowner_res {
609 	struct nfs4_sequence_res	seq_res;
610 };
611 
612 struct nfs4_delegreturnargs {
613 	struct nfs4_sequence_args	seq_args;
614 	const struct nfs_fh *fhandle;
615 	const nfs4_stateid *stateid;
616 	const u32 *bitmask;
617 	u32 bitmask_store[NFS_BITMASK_SZ];
618 	struct nfs4_layoutreturn_args *lr_args;
619 };
620 
621 struct nfs4_delegreturnres {
622 	struct nfs4_sequence_res	seq_res;
623 	struct nfs_fattr * fattr;
624 	struct nfs_server *server;
625 	struct nfs4_layoutreturn_res *lr_res;
626 	int lr_ret;
627 };
628 
629 /*
630  * Arguments to the write call.
631  */
632 struct nfs_write_verifier {
633 	char			data[8];
634 };
635 
636 struct nfs_writeverf {
637 	struct nfs_write_verifier verifier;
638 	enum nfs3_stable_how	committed;
639 };
640 
641 /*
642  * Arguments shared by the read and write call.
643  */
644 struct nfs_pgio_args {
645 	struct nfs4_sequence_args	seq_args;
646 	struct nfs_fh *		fh;
647 	struct nfs_open_context *context;
648 	struct nfs_lock_context *lock_context;
649 	nfs4_stateid		stateid;
650 	__u64			offset;
651 	__u32			count;
652 	unsigned int		pgbase;
653 	struct page **		pages;
654 	union {
655 		unsigned int		replen;			/* used by read */
656 		struct {
657 			const u32 *		bitmask;	/* used by write */
658 			u32 bitmask_store[NFS_BITMASK_SZ];	/* used by write */
659 			enum nfs3_stable_how	stable;		/* used by write */
660 		};
661 	};
662 };
663 
664 struct nfs_pgio_res {
665 	struct nfs4_sequence_res	seq_res;
666 	struct nfs_fattr *	fattr;
667 	__u64			count;
668 	__u32			op_status;
669 	union {
670 		struct {
671 			unsigned int		replen;		/* used by read */
672 			int			eof;		/* used by read */
673 			void *			scratch;	/* used by read */
674 		};
675 		struct {
676 			struct nfs_writeverf *	verf;		/* used by write */
677 			const struct nfs_server *server;	/* used by write */
678 		};
679 	};
680 };
681 
682 /*
683  * Arguments to the commit call.
684  */
685 struct nfs_commitargs {
686 	struct nfs4_sequence_args	seq_args;
687 	struct nfs_fh		*fh;
688 	__u64			offset;
689 	__u32			count;
690 	const u32		*bitmask;
691 };
692 
693 struct nfs_commitres {
694 	struct nfs4_sequence_res	seq_res;
695 	__u32			op_status;
696 	struct nfs_fattr	*fattr;
697 	struct nfs_writeverf	*verf;
698 	const struct nfs_server *server;
699 };
700 
701 /*
702  * Common arguments to the unlink call
703  */
704 struct nfs_removeargs {
705 	struct nfs4_sequence_args	seq_args;
706 	const struct nfs_fh	*fh;
707 	struct qstr		name;
708 };
709 
710 struct nfs_removeres {
711 	struct nfs4_sequence_res 	seq_res;
712 	struct nfs_server *server;
713 	struct nfs_fattr	*dir_attr;
714 	struct nfs4_change_info	cinfo;
715 };
716 
717 /*
718  * Common arguments to the rename call
719  */
720 struct nfs_renameargs {
721 	struct nfs4_sequence_args	seq_args;
722 	const struct nfs_fh		*old_dir;
723 	const struct nfs_fh		*new_dir;
724 	const struct qstr		*old_name;
725 	const struct qstr		*new_name;
726 };
727 
728 struct nfs_renameres {
729 	struct nfs4_sequence_res	seq_res;
730 	struct nfs_server		*server;
731 	struct nfs4_change_info		old_cinfo;
732 	struct nfs_fattr		*old_fattr;
733 	struct nfs4_change_info		new_cinfo;
734 	struct nfs_fattr		*new_fattr;
735 };
736 
737 /* parsed sec= options */
738 #define NFS_AUTH_INFO_MAX_FLAVORS 12 /* see fs/nfs/super.c */
739 struct nfs_auth_info {
740 	unsigned int            flavor_len;
741 	rpc_authflavor_t        flavors[NFS_AUTH_INFO_MAX_FLAVORS];
742 };
743 
744 /*
745  * Argument struct for decode_entry function
746  */
747 struct nfs_entry {
748 	__u64			ino;
749 	__u64			cookie;
750 	const char *		name;
751 	unsigned int		len;
752 	int			eof;
753 	struct nfs_fh *		fh;
754 	struct nfs_fattr *	fattr;
755 	unsigned char		d_type;
756 	struct nfs_server *	server;
757 };
758 
759 struct nfs_readdir_arg {
760 	struct dentry		*dentry;
761 	const struct cred	*cred;
762 	__be32			*verf;
763 	u64			cookie;
764 	struct page		**pages;
765 	unsigned int		page_len;
766 	bool			plus;
767 };
768 
769 struct nfs_readdir_res {
770 	__be32			*verf;
771 };
772 
773 /*
774  * The following types are for NFSv2 only.
775  */
776 struct nfs_sattrargs {
777 	struct nfs_fh *		fh;
778 	struct iattr *		sattr;
779 };
780 
781 struct nfs_diropargs {
782 	struct nfs_fh *		fh;
783 	const char *		name;
784 	unsigned int		len;
785 };
786 
787 struct nfs_createargs {
788 	struct nfs_fh *		fh;
789 	const char *		name;
790 	unsigned int		len;
791 	struct iattr *		sattr;
792 };
793 
794 struct nfs_setattrargs {
795 	struct nfs4_sequence_args 	seq_args;
796 	struct nfs_fh *                 fh;
797 	nfs4_stateid                    stateid;
798 	struct iattr *                  iap;
799 	const struct nfs_server *	server; /* Needed for name mapping */
800 	const u32 *			bitmask;
801 	const struct nfs4_label		*label;
802 };
803 
804 enum nfs4_acl_type {
805 	NFS4ACL_NONE = 0,
806 	NFS4ACL_ACL,
807 	NFS4ACL_DACL,
808 	NFS4ACL_SACL,
809 };
810 
811 struct nfs_setaclargs {
812 	struct nfs4_sequence_args	seq_args;
813 	struct nfs_fh *			fh;
814 	enum nfs4_acl_type		acl_type;
815 	size_t				acl_len;
816 	struct page **			acl_pages;
817 };
818 
819 struct nfs_setaclres {
820 	struct nfs4_sequence_res	seq_res;
821 };
822 
823 struct nfs_getaclargs {
824 	struct nfs4_sequence_args 	seq_args;
825 	struct nfs_fh *			fh;
826 	enum nfs4_acl_type		acl_type;
827 	size_t				acl_len;
828 	struct page **			acl_pages;
829 };
830 
831 /* getxattr ACL interface flags */
832 #define NFS4_ACL_TRUNC		0x0001	/* ACL was truncated */
833 struct nfs_getaclres {
834 	struct nfs4_sequence_res	seq_res;
835 	enum nfs4_acl_type		acl_type;
836 	size_t				acl_len;
837 	size_t				acl_data_offset;
838 	int				acl_flags;
839 	struct page *			acl_scratch;
840 };
841 
842 struct nfs_setattrres {
843 	struct nfs4_sequence_res	seq_res;
844 	struct nfs_fattr *              fattr;
845 	const struct nfs_server *	server;
846 };
847 
848 struct nfs_linkargs {
849 	struct nfs_fh *		fromfh;
850 	struct nfs_fh *		tofh;
851 	const char *		toname;
852 	unsigned int		tolen;
853 };
854 
855 struct nfs_symlinkargs {
856 	struct nfs_fh *		fromfh;
857 	const char *		fromname;
858 	unsigned int		fromlen;
859 	struct page **		pages;
860 	unsigned int		pathlen;
861 	struct iattr *		sattr;
862 };
863 
864 struct nfs_readdirargs {
865 	struct nfs_fh *		fh;
866 	__u32			cookie;
867 	unsigned int		count;
868 	struct page **		pages;
869 };
870 
871 struct nfs3_getaclargs {
872 	struct nfs_fh *		fh;
873 	int			mask;
874 	struct page **		pages;
875 };
876 
877 struct nfs3_setaclargs {
878 	struct inode *		inode;
879 	int			mask;
880 	struct posix_acl *	acl_access;
881 	struct posix_acl *	acl_default;
882 	size_t			len;
883 	unsigned int		npages;
884 	struct page **		pages;
885 };
886 
887 struct nfs_diropok {
888 	struct nfs_fh *		fh;
889 	struct nfs_fattr *	fattr;
890 };
891 
892 struct nfs_readlinkargs {
893 	struct nfs_fh *		fh;
894 	unsigned int		pgbase;
895 	unsigned int		pglen;
896 	struct page **		pages;
897 };
898 
899 struct nfs3_sattrargs {
900 	struct nfs_fh *		fh;
901 	struct iattr *		sattr;
902 	unsigned int		guard;
903 	struct timespec64	guardtime;
904 };
905 
906 struct nfs3_diropargs {
907 	struct nfs_fh *		fh;
908 	const char *		name;
909 	unsigned int		len;
910 };
911 
912 struct nfs3_accessargs {
913 	struct nfs_fh *		fh;
914 	__u32			access;
915 };
916 
917 struct nfs3_createargs {
918 	struct nfs_fh *		fh;
919 	const char *		name;
920 	unsigned int		len;
921 	struct iattr *		sattr;
922 	enum nfs3_createmode	createmode;
923 	__be32			verifier[2];
924 };
925 
926 struct nfs3_mkdirargs {
927 	struct nfs_fh *		fh;
928 	const char *		name;
929 	unsigned int		len;
930 	struct iattr *		sattr;
931 };
932 
933 struct nfs3_symlinkargs {
934 	struct nfs_fh *		fromfh;
935 	const char *		fromname;
936 	unsigned int		fromlen;
937 	struct page **		pages;
938 	unsigned int		pathlen;
939 	struct iattr *		sattr;
940 };
941 
942 struct nfs3_mknodargs {
943 	struct nfs_fh *		fh;
944 	const char *		name;
945 	unsigned int		len;
946 	enum nfs3_ftype		type;
947 	struct iattr *		sattr;
948 	dev_t			rdev;
949 };
950 
951 struct nfs3_linkargs {
952 	struct nfs_fh *		fromfh;
953 	struct nfs_fh *		tofh;
954 	const char *		toname;
955 	unsigned int		tolen;
956 };
957 
958 struct nfs3_readdirargs {
959 	struct nfs_fh *		fh;
960 	__u64			cookie;
961 	__be32			verf[2];
962 	bool			plus;
963 	unsigned int            count;
964 	struct page **		pages;
965 };
966 
967 struct nfs3_diropres {
968 	struct nfs_fattr *	dir_attr;
969 	struct nfs_fh *		fh;
970 	struct nfs_fattr *	fattr;
971 };
972 
973 struct nfs3_accessres {
974 	struct nfs_fattr *	fattr;
975 	__u32			access;
976 };
977 
978 struct nfs3_readlinkargs {
979 	struct nfs_fh *		fh;
980 	unsigned int		pgbase;
981 	unsigned int		pglen;
982 	struct page **		pages;
983 };
984 
985 struct nfs3_linkres {
986 	struct nfs_fattr *	dir_attr;
987 	struct nfs_fattr *	fattr;
988 };
989 
990 struct nfs3_readdirres {
991 	struct nfs_fattr *	dir_attr;
992 	__be32 *		verf;
993 	bool			plus;
994 };
995 
996 struct nfs3_getaclres {
997 	struct nfs_fattr *	fattr;
998 	int			mask;
999 	unsigned int		acl_access_count;
1000 	unsigned int		acl_default_count;
1001 	struct posix_acl *	acl_access;
1002 	struct posix_acl *	acl_default;
1003 };
1004 
1005 #if IS_ENABLED(CONFIG_NFS_V4)
1006 
1007 typedef u64 clientid4;
1008 
1009 struct nfs4_accessargs {
1010 	struct nfs4_sequence_args	seq_args;
1011 	const struct nfs_fh *		fh;
1012 	const u32 *			bitmask;
1013 	u32				access;
1014 };
1015 
1016 struct nfs4_accessres {
1017 	struct nfs4_sequence_res	seq_res;
1018 	const struct nfs_server *	server;
1019 	struct nfs_fattr *		fattr;
1020 	u32				supported;
1021 	u32				access;
1022 };
1023 
1024 struct nfs4_create_arg {
1025 	struct nfs4_sequence_args 	seq_args;
1026 	u32				ftype;
1027 	union {
1028 		struct {
1029 			struct page **	pages;
1030 			unsigned int	len;
1031 		} symlink;   /* NF4LNK */
1032 		struct {
1033 			u32		specdata1;
1034 			u32		specdata2;
1035 		} device;    /* NF4BLK, NF4CHR */
1036 	} u;
1037 	const struct qstr *		name;
1038 	const struct nfs_server *	server;
1039 	const struct iattr *		attrs;
1040 	const struct nfs_fh *		dir_fh;
1041 	const u32 *			bitmask;
1042 	const struct nfs4_label		*label;
1043 	umode_t				umask;
1044 };
1045 
1046 struct nfs4_create_res {
1047 	struct nfs4_sequence_res	seq_res;
1048 	const struct nfs_server *	server;
1049 	struct nfs_fh *			fh;
1050 	struct nfs_fattr *		fattr;
1051 	struct nfs4_change_info		dir_cinfo;
1052 };
1053 
1054 struct nfs4_fsinfo_arg {
1055 	struct nfs4_sequence_args	seq_args;
1056 	const struct nfs_fh *		fh;
1057 	const u32 *			bitmask;
1058 };
1059 
1060 struct nfs4_fsinfo_res {
1061 	struct nfs4_sequence_res	seq_res;
1062 	struct nfs_fsinfo	       *fsinfo;
1063 };
1064 
1065 struct nfs4_getattr_arg {
1066 	struct nfs4_sequence_args	seq_args;
1067 	const struct nfs_fh *		fh;
1068 	const u32 *			bitmask;
1069 };
1070 
1071 struct nfs4_getattr_res {
1072 	struct nfs4_sequence_res	seq_res;
1073 	const struct nfs_server *	server;
1074 	struct nfs_fattr *		fattr;
1075 };
1076 
1077 struct nfs4_link_arg {
1078 	struct nfs4_sequence_args 	seq_args;
1079 	const struct nfs_fh *		fh;
1080 	const struct nfs_fh *		dir_fh;
1081 	const struct qstr *		name;
1082 	const u32 *			bitmask;
1083 };
1084 
1085 struct nfs4_link_res {
1086 	struct nfs4_sequence_res	seq_res;
1087 	const struct nfs_server *	server;
1088 	struct nfs_fattr *		fattr;
1089 	struct nfs4_change_info		cinfo;
1090 	struct nfs_fattr *		dir_attr;
1091 };
1092 
1093 struct nfs4_lookup_arg {
1094 	struct nfs4_sequence_args	seq_args;
1095 	const struct nfs_fh *		dir_fh;
1096 	const struct qstr *		name;
1097 	const u32 *			bitmask;
1098 };
1099 
1100 struct nfs4_lookup_res {
1101 	struct nfs4_sequence_res	seq_res;
1102 	const struct nfs_server *	server;
1103 	struct nfs_fattr *		fattr;
1104 	struct nfs_fh *			fh;
1105 };
1106 
1107 struct nfs4_lookupp_arg {
1108 	struct nfs4_sequence_args	seq_args;
1109 	const struct nfs_fh		*fh;
1110 	const u32			*bitmask;
1111 };
1112 
1113 struct nfs4_lookupp_res {
1114 	struct nfs4_sequence_res	seq_res;
1115 	const struct nfs_server		*server;
1116 	struct nfs_fattr		*fattr;
1117 	struct nfs_fh			*fh;
1118 };
1119 
1120 struct nfs4_lookup_root_arg {
1121 	struct nfs4_sequence_args	seq_args;
1122 	const u32 *			bitmask;
1123 };
1124 
1125 struct nfs4_pathconf_arg {
1126 	struct nfs4_sequence_args	seq_args;
1127 	const struct nfs_fh *		fh;
1128 	const u32 *			bitmask;
1129 };
1130 
1131 struct nfs4_pathconf_res {
1132 	struct nfs4_sequence_res	seq_res;
1133 	struct nfs_pathconf	       *pathconf;
1134 };
1135 
1136 struct nfs4_readdir_arg {
1137 	struct nfs4_sequence_args	seq_args;
1138 	const struct nfs_fh *		fh;
1139 	u64				cookie;
1140 	nfs4_verifier			verifier;
1141 	u32				count;
1142 	struct page **			pages;	/* zero-copy data */
1143 	unsigned int			pgbase;	/* zero-copy data */
1144 	const u32 *			bitmask;
1145 	bool				plus;
1146 };
1147 
1148 struct nfs4_readdir_res {
1149 	struct nfs4_sequence_res	seq_res;
1150 	nfs4_verifier			verifier;
1151 	unsigned int			pgbase;
1152 };
1153 
1154 struct nfs4_readlink {
1155 	struct nfs4_sequence_args	seq_args;
1156 	const struct nfs_fh *		fh;
1157 	unsigned int			pgbase;
1158 	unsigned int			pglen;   /* zero-copy data */
1159 	struct page **			pages;   /* zero-copy data */
1160 };
1161 
1162 struct nfs4_readlink_res {
1163 	struct nfs4_sequence_res	seq_res;
1164 };
1165 
1166 struct nfs4_setclientid {
1167 	const nfs4_verifier *		sc_verifier;
1168 	u32				sc_prog;
1169 	unsigned int			sc_netid_len;
1170 	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
1171 	unsigned int			sc_uaddr_len;
1172 	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
1173 	struct nfs_client		*sc_clnt;
1174 	struct rpc_cred			*sc_cred;
1175 };
1176 
1177 struct nfs4_setclientid_res {
1178 	u64				clientid;
1179 	nfs4_verifier			confirm;
1180 };
1181 
1182 struct nfs4_statfs_arg {
1183 	struct nfs4_sequence_args	seq_args;
1184 	const struct nfs_fh *		fh;
1185 	const u32 *			bitmask;
1186 };
1187 
1188 struct nfs4_statfs_res {
1189 	struct nfs4_sequence_res	seq_res;
1190 	struct nfs_fsstat	       *fsstat;
1191 };
1192 
1193 struct nfs4_server_caps_arg {
1194 	struct nfs4_sequence_args	seq_args;
1195 	struct nfs_fh		       *fhandle;
1196 	const u32 *			bitmask;
1197 };
1198 
1199 struct nfs4_server_caps_res {
1200 	struct nfs4_sequence_res	seq_res;
1201 	u32				attr_bitmask[3];
1202 	u32				exclcreat_bitmask[3];
1203 	u32				acl_bitmask;
1204 	u32				has_links;
1205 	u32				has_symlinks;
1206 	u32				fh_expire_type;
1207 	u32				case_insensitive;
1208 	u32				case_preserving;
1209 };
1210 
1211 #define NFS4_PATHNAME_MAXCOMPONENTS 512
1212 struct nfs4_pathname {
1213 	unsigned int ncomponents;
1214 	struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
1215 };
1216 
1217 #define NFS4_FS_LOCATION_MAXSERVERS 10
1218 struct nfs4_fs_location {
1219 	unsigned int nservers;
1220 	struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
1221 	struct nfs4_pathname rootpath;
1222 };
1223 
1224 #define NFS4_FS_LOCATIONS_MAXENTRIES 10
1225 struct nfs4_fs_locations {
1226 	struct nfs_fattr *fattr;
1227 	const struct nfs_server *server;
1228 	struct nfs4_pathname fs_path;
1229 	int nlocations;
1230 	struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
1231 };
1232 
1233 struct nfs4_fs_locations_arg {
1234 	struct nfs4_sequence_args	seq_args;
1235 	const struct nfs_fh *dir_fh;
1236 	const struct nfs_fh *fh;
1237 	const struct qstr *name;
1238 	struct page *page;
1239 	const u32 *bitmask;
1240 	clientid4 clientid;
1241 	unsigned char migration:1, renew:1;
1242 };
1243 
1244 struct nfs4_fs_locations_res {
1245 	struct nfs4_sequence_res	seq_res;
1246 	struct nfs4_fs_locations       *fs_locations;
1247 	unsigned char			migration:1, renew:1;
1248 };
1249 
1250 struct nfs4_secinfo4 {
1251 	u32			flavor;
1252 	struct rpcsec_gss_info	flavor_info;
1253 };
1254 
1255 struct nfs4_secinfo_flavors {
1256 	unsigned int		num_flavors;
1257 	struct nfs4_secinfo4	flavors[];
1258 };
1259 
1260 struct nfs4_secinfo_arg {
1261 	struct nfs4_sequence_args	seq_args;
1262 	const struct nfs_fh		*dir_fh;
1263 	const struct qstr		*name;
1264 };
1265 
1266 struct nfs4_secinfo_res {
1267 	struct nfs4_sequence_res	seq_res;
1268 	struct nfs4_secinfo_flavors	*flavors;
1269 };
1270 
1271 struct nfs4_fsid_present_arg {
1272 	struct nfs4_sequence_args	seq_args;
1273 	const struct nfs_fh		*fh;
1274 	clientid4			clientid;
1275 	unsigned char			renew:1;
1276 };
1277 
1278 struct nfs4_fsid_present_res {
1279 	struct nfs4_sequence_res	seq_res;
1280 	struct nfs_fh			*fh;
1281 	unsigned char			renew:1;
1282 };
1283 
1284 #endif /* CONFIG_NFS_V4 */
1285 
1286 struct nfstime4 {
1287 	u64	seconds;
1288 	u32	nseconds;
1289 };
1290 
1291 #ifdef CONFIG_NFS_V4_1
1292 
1293 struct pnfs_commit_bucket {
1294 	struct list_head written;
1295 	struct list_head committing;
1296 	struct pnfs_layout_segment *lseg;
1297 	struct nfs_writeverf direct_verf;
1298 };
1299 
1300 struct pnfs_commit_array {
1301 	struct list_head cinfo_list;
1302 	struct list_head lseg_list;
1303 	struct pnfs_layout_segment *lseg;
1304 	struct rcu_head rcu;
1305 	refcount_t refcount;
1306 	unsigned int nbuckets;
1307 	struct pnfs_commit_bucket buckets[];
1308 };
1309 
1310 struct pnfs_ds_commit_info {
1311 	struct list_head commits;
1312 	unsigned int nwritten;
1313 	unsigned int ncommitting;
1314 	const struct pnfs_commit_ops *ops;
1315 };
1316 
1317 struct nfs41_state_protection {
1318 	u32 how;
1319 	struct nfs4_op_map enforce;
1320 	struct nfs4_op_map allow;
1321 };
1322 
1323 struct nfs41_exchange_id_args {
1324 	struct nfs_client		*client;
1325 	nfs4_verifier			verifier;
1326 	u32				flags;
1327 	struct nfs41_state_protection	state_protect;
1328 };
1329 
1330 struct nfs41_server_owner {
1331 	uint64_t			minor_id;
1332 	uint32_t			major_id_sz;
1333 	char				major_id[NFS4_OPAQUE_LIMIT];
1334 };
1335 
1336 struct nfs41_server_scope {
1337 	uint32_t			server_scope_sz;
1338 	char 				server_scope[NFS4_OPAQUE_LIMIT];
1339 };
1340 
1341 struct nfs41_impl_id {
1342 	char				domain[NFS4_OPAQUE_LIMIT + 1];
1343 	char				name[NFS4_OPAQUE_LIMIT + 1];
1344 	struct nfstime4			date;
1345 };
1346 
1347 #define MAX_BIND_CONN_TO_SESSION_RETRIES 3
1348 struct nfs41_bind_conn_to_session_args {
1349 	struct nfs_client		*client;
1350 	struct nfs4_sessionid		sessionid;
1351 	u32				dir;
1352 	bool				use_conn_in_rdma_mode;
1353 	int				retries;
1354 };
1355 
1356 struct nfs41_bind_conn_to_session_res {
1357 	struct nfs4_sessionid		sessionid;
1358 	u32				dir;
1359 	bool				use_conn_in_rdma_mode;
1360 };
1361 
1362 struct nfs41_exchange_id_res {
1363 	u64				clientid;
1364 	u32				seqid;
1365 	u32				flags;
1366 	struct nfs41_server_owner	*server_owner;
1367 	struct nfs41_server_scope	*server_scope;
1368 	struct nfs41_impl_id		*impl_id;
1369 	struct nfs41_state_protection	state_protect;
1370 };
1371 
1372 struct nfs41_create_session_args {
1373 	struct nfs_client	       *client;
1374 	u64				clientid;
1375 	uint32_t			seqid;
1376 	uint32_t			flags;
1377 	uint32_t			cb_program;
1378 	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
1379 	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
1380 };
1381 
1382 struct nfs41_create_session_res {
1383 	struct nfs4_sessionid		sessionid;
1384 	uint32_t			seqid;
1385 	uint32_t			flags;
1386 	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
1387 	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
1388 };
1389 
1390 struct nfs41_reclaim_complete_args {
1391 	struct nfs4_sequence_args	seq_args;
1392 	/* In the future extend to include curr_fh for use with migration */
1393 	unsigned char			one_fs:1;
1394 };
1395 
1396 struct nfs41_reclaim_complete_res {
1397 	struct nfs4_sequence_res	seq_res;
1398 };
1399 
1400 #define SECINFO_STYLE_CURRENT_FH 0
1401 #define SECINFO_STYLE_PARENT 1
1402 struct nfs41_secinfo_no_name_args {
1403 	struct nfs4_sequence_args	seq_args;
1404 	int				style;
1405 };
1406 
1407 struct nfs41_test_stateid_args {
1408 	struct nfs4_sequence_args	seq_args;
1409 	nfs4_stateid			*stateid;
1410 };
1411 
1412 struct nfs41_test_stateid_res {
1413 	struct nfs4_sequence_res	seq_res;
1414 	unsigned int			status;
1415 };
1416 
1417 struct nfs41_free_stateid_args {
1418 	struct nfs4_sequence_args	seq_args;
1419 	nfs4_stateid			stateid;
1420 };
1421 
1422 struct nfs41_free_stateid_res {
1423 	struct nfs4_sequence_res	seq_res;
1424 	unsigned int			status;
1425 };
1426 
1427 #else
1428 
1429 struct pnfs_ds_commit_info {
1430 };
1431 
1432 #endif /* CONFIG_NFS_V4_1 */
1433 
1434 #ifdef CONFIG_NFS_V4_2
1435 struct nfs42_falloc_args {
1436 	struct nfs4_sequence_args	seq_args;
1437 
1438 	struct nfs_fh			*falloc_fh;
1439 	nfs4_stateid			 falloc_stateid;
1440 	u64				 falloc_offset;
1441 	u64				 falloc_length;
1442 	const u32			*falloc_bitmask;
1443 };
1444 
1445 struct nfs42_falloc_res {
1446 	struct nfs4_sequence_res	seq_res;
1447 	unsigned int			status;
1448 
1449 	struct nfs_fattr		*falloc_fattr;
1450 	const struct nfs_server		*falloc_server;
1451 };
1452 
1453 struct nfs42_copy_args {
1454 	struct nfs4_sequence_args	seq_args;
1455 
1456 	struct nfs_fh			*src_fh;
1457 	nfs4_stateid			src_stateid;
1458 	u64				src_pos;
1459 
1460 	struct nfs_fh			*dst_fh;
1461 	nfs4_stateid			dst_stateid;
1462 	u64				dst_pos;
1463 
1464 	u64				count;
1465 	bool				sync;
1466 	struct nl4_server		*cp_src;
1467 };
1468 
1469 struct nfs42_write_res {
1470 	nfs4_stateid		stateid;
1471 	u64			count;
1472 	struct nfs_writeverf	verifier;
1473 };
1474 
1475 struct nfs42_copy_res {
1476 	struct nfs4_sequence_res	seq_res;
1477 	struct nfs42_write_res		write_res;
1478 	bool				consecutive;
1479 	bool				synchronous;
1480 	struct nfs_commitres		commit_res;
1481 };
1482 
1483 struct nfs42_offload_status_args {
1484 	struct nfs4_sequence_args	osa_seq_args;
1485 	struct nfs_fh			*osa_src_fh;
1486 	nfs4_stateid			osa_stateid;
1487 };
1488 
1489 struct nfs42_offload_status_res {
1490 	struct nfs4_sequence_res	osr_seq_res;
1491 	uint64_t			osr_count;
1492 	int				osr_status;
1493 };
1494 
1495 struct nfs42_copy_notify_args {
1496 	struct nfs4_sequence_args	cna_seq_args;
1497 
1498 	struct nfs_fh		*cna_src_fh;
1499 	nfs4_stateid		cna_src_stateid;
1500 	struct nl4_server	cna_dst;
1501 };
1502 
1503 struct nfs42_copy_notify_res {
1504 	struct nfs4_sequence_res	cnr_seq_res;
1505 
1506 	struct nfstime4		cnr_lease_time;
1507 	nfs4_stateid		cnr_stateid;
1508 	struct nl4_server	cnr_src;
1509 };
1510 
1511 struct nfs42_seek_args {
1512 	struct nfs4_sequence_args	seq_args;
1513 
1514 	struct nfs_fh			*sa_fh;
1515 	nfs4_stateid			sa_stateid;
1516 	u64				sa_offset;
1517 	u32				sa_what;
1518 };
1519 
1520 struct nfs42_seek_res {
1521 	struct nfs4_sequence_res	seq_res;
1522 	unsigned int			status;
1523 
1524 	u32	sr_eof;
1525 	u64	sr_offset;
1526 };
1527 
1528 struct nfs42_setxattrargs {
1529 	struct nfs4_sequence_args	seq_args;
1530 	struct nfs_fh			*fh;
1531 	const u32			*bitmask;
1532 	const char			*xattr_name;
1533 	u32				xattr_flags;
1534 	size_t				xattr_len;
1535 	struct page			**xattr_pages;
1536 };
1537 
1538 struct nfs42_setxattrres {
1539 	struct nfs4_sequence_res	seq_res;
1540 	struct nfs4_change_info		cinfo;
1541 	struct nfs_fattr		*fattr;
1542 	const struct nfs_server		*server;
1543 };
1544 
1545 struct nfs42_getxattrargs {
1546 	struct nfs4_sequence_args	seq_args;
1547 	struct nfs_fh			*fh;
1548 	const char			*xattr_name;
1549 	size_t				xattr_len;
1550 	struct page			**xattr_pages;
1551 };
1552 
1553 struct nfs42_getxattrres {
1554 	struct nfs4_sequence_res	seq_res;
1555 	size_t				xattr_len;
1556 };
1557 
1558 struct nfs42_listxattrsargs {
1559 	struct nfs4_sequence_args	seq_args;
1560 	struct nfs_fh			*fh;
1561 	u32				count;
1562 	u64				cookie;
1563 	struct page			**xattr_pages;
1564 };
1565 
1566 struct nfs42_listxattrsres {
1567 	struct nfs4_sequence_res	seq_res;
1568 	struct page			*scratch;
1569 	void				*xattr_buf;
1570 	size_t				xattr_len;
1571 	u64				cookie;
1572 	bool				eof;
1573 	size_t				copied;
1574 };
1575 
1576 struct nfs42_removexattrargs {
1577 	struct nfs4_sequence_args	seq_args;
1578 	struct nfs_fh			*fh;
1579 	const char			*xattr_name;
1580 };
1581 
1582 struct nfs42_removexattrres {
1583 	struct nfs4_sequence_res	seq_res;
1584 	struct nfs4_change_info		cinfo;
1585 };
1586 
1587 #endif /* CONFIG_NFS_V4_2 */
1588 
1589 struct nfs_page;
1590 
1591 #define NFS_PAGEVEC_SIZE	(8U)
1592 
1593 struct nfs_page_array {
1594 	struct page		**pagevec;
1595 	unsigned int		npages;		/* Max length of pagevec */
1596 	struct page		*page_array[NFS_PAGEVEC_SIZE];
1597 };
1598 
1599 /* used as flag bits in nfs_pgio_header */
1600 enum {
1601 	NFS_IOHDR_ERROR = 0,
1602 	NFS_IOHDR_EOF,
1603 	NFS_IOHDR_REDO,
1604 	NFS_IOHDR_STAT,
1605 	NFS_IOHDR_RESEND_PNFS,
1606 	NFS_IOHDR_RESEND_MDS,
1607 	NFS_IOHDR_UNSTABLE_WRITES,
1608 };
1609 
1610 struct nfs_io_completion;
1611 struct nfs_pgio_header {
1612 	struct inode		*inode;
1613 	const struct cred		*cred;
1614 	struct list_head	pages;
1615 	struct nfs_page		*req;
1616 	struct nfs_writeverf	verf;		/* Used for writes */
1617 	fmode_t			rw_mode;
1618 	struct pnfs_layout_segment *lseg;
1619 	loff_t			io_start;
1620 	const struct rpc_call_ops *mds_ops;
1621 	void (*release) (struct nfs_pgio_header *hdr);
1622 	const struct nfs_pgio_completion_ops *completion_ops;
1623 	const struct nfs_rw_ops	*rw_ops;
1624 	struct nfs_io_completion *io_completion;
1625 	struct nfs_direct_req	*dreq;
1626 #ifdef CONFIG_NFS_FSCACHE
1627 	void			*netfs;
1628 #endif
1629 
1630 	int			pnfs_error;
1631 	int			error;		/* merge with pnfs_error */
1632 	unsigned int		good_bytes;	/* boundary of good data */
1633 	unsigned long		flags;
1634 
1635 	/*
1636 	 * rpc data
1637 	 */
1638 	struct rpc_task		task;
1639 	struct nfs_fattr	fattr;
1640 	struct nfs_pgio_args	args;		/* argument struct */
1641 	struct nfs_pgio_res	res;		/* result struct */
1642 	unsigned long		timestamp;	/* For lease renewal */
1643 	int (*pgio_done_cb)(struct rpc_task *, struct nfs_pgio_header *);
1644 	__u64			mds_offset;	/* Filelayout dense stripe */
1645 	struct nfs_page_array	page_array;
1646 	struct nfs_client	*ds_clp;	/* pNFS data server */
1647 	u32			ds_commit_idx;	/* ds index if ds_clp is set */
1648 	u32			pgio_mirror_idx;/* mirror index in pgio layer */
1649 };
1650 
1651 struct nfs_mds_commit_info {
1652 	atomic_t rpcs_out;
1653 	atomic_long_t		ncommit;
1654 	struct list_head	list;
1655 };
1656 
1657 struct nfs_commit_info;
1658 struct nfs_commit_data;
1659 struct nfs_inode;
1660 struct nfs_commit_completion_ops {
1661 	void (*completion) (struct nfs_commit_data *data);
1662 	void (*resched_write) (struct nfs_commit_info *, struct nfs_page *);
1663 };
1664 
1665 struct nfs_commit_info {
1666 	struct inode 			*inode;	/* Needed for inode->i_lock */
1667 	struct nfs_mds_commit_info	*mds;
1668 	struct pnfs_ds_commit_info	*ds;
1669 	struct nfs_direct_req		*dreq;	/* O_DIRECT request */
1670 	const struct nfs_commit_completion_ops *completion_ops;
1671 };
1672 
1673 struct nfs_commit_data {
1674 	struct rpc_task		task;
1675 	struct inode		*inode;
1676 	const struct cred		*cred;
1677 	struct nfs_fattr	fattr;
1678 	struct nfs_writeverf	verf;
1679 	struct list_head	pages;		/* Coalesced requests we wish to flush */
1680 	struct list_head	list;		/* lists of struct nfs_write_data */
1681 	struct nfs_direct_req	*dreq;		/* O_DIRECT request */
1682 	struct nfs_commitargs	args;		/* argument struct */
1683 	struct nfs_commitres	res;		/* result struct */
1684 	struct nfs_open_context *context;
1685 	struct pnfs_layout_segment *lseg;
1686 	struct nfs_client	*ds_clp;	/* pNFS data server */
1687 	int			ds_commit_index;
1688 	loff_t			lwb;
1689 	const struct rpc_call_ops *mds_ops;
1690 	const struct nfs_commit_completion_ops *completion_ops;
1691 	int (*commit_done_cb) (struct rpc_task *task, struct nfs_commit_data *data);
1692 	unsigned long		flags;
1693 };
1694 
1695 struct nfs_pgio_completion_ops {
1696 	void	(*error_cleanup)(struct list_head *head, int);
1697 	void	(*init_hdr)(struct nfs_pgio_header *hdr);
1698 	void	(*completion)(struct nfs_pgio_header *hdr);
1699 	void	(*reschedule_io)(struct nfs_pgio_header *hdr);
1700 };
1701 
1702 struct nfs_unlinkdata {
1703 	struct nfs_removeargs args;
1704 	struct nfs_removeres res;
1705 	struct dentry *dentry;
1706 	wait_queue_head_t wq;
1707 	const struct cred *cred;
1708 	struct nfs_fattr dir_attr;
1709 	long timeout;
1710 };
1711 
1712 struct nfs_renamedata {
1713 	struct nfs_renameargs	args;
1714 	struct nfs_renameres	res;
1715 	struct rpc_task		task;
1716 	const struct cred	*cred;
1717 	struct inode		*old_dir;
1718 	struct dentry		*old_dentry;
1719 	struct nfs_fattr	old_fattr;
1720 	struct inode		*new_dir;
1721 	struct dentry		*new_dentry;
1722 	struct nfs_fattr	new_fattr;
1723 	void (*complete)(struct rpc_task *, struct nfs_renamedata *);
1724 	long timeout;
1725 	bool cancelled;
1726 };
1727 
1728 struct nfs_access_entry;
1729 struct nfs_client;
1730 struct rpc_timeout;
1731 struct nfs_subversion;
1732 struct nfs_mount_info;
1733 struct nfs_client_initdata;
1734 struct nfs_pageio_descriptor;
1735 struct fs_context;
1736 
1737 /*
1738  * RPC procedure vector for NFSv2/NFSv3 demuxing
1739  */
1740 struct nfs_rpc_ops {
1741 	u32	version;		/* Protocol version */
1742 	const struct dentry_operations *dentry_ops;
1743 	const struct inode_operations *dir_inode_ops;
1744 	const struct inode_operations *file_inode_ops;
1745 	const struct file_operations *file_ops;
1746 	const struct nlmclnt_operations *nlmclnt_ops;
1747 
1748 	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
1749 			    struct nfs_fsinfo *);
1750 	int	(*submount) (struct fs_context *, struct nfs_server *);
1751 	int	(*try_get_tree) (struct fs_context *);
1752 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
1753 			    struct nfs_fattr *, struct inode *);
1754 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
1755 			    struct iattr *);
1756 	int	(*lookup)  (struct inode *, struct dentry *,
1757 			    struct nfs_fh *, struct nfs_fattr *);
1758 	int	(*lookupp) (struct inode *, struct nfs_fh *,
1759 			    struct nfs_fattr *);
1760 	int	(*access)  (struct inode *, struct nfs_access_entry *, const struct cred *);
1761 	int	(*readlink)(struct inode *, struct page *, unsigned int,
1762 			    unsigned int);
1763 	int	(*create)  (struct inode *, struct dentry *,
1764 			    struct iattr *, int);
1765 	int	(*remove)  (struct inode *, struct dentry *);
1766 	void	(*unlink_setup)  (struct rpc_message *, struct dentry *, struct inode *);
1767 	void	(*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
1768 	int	(*unlink_done) (struct rpc_task *, struct inode *);
1769 	void	(*rename_setup)  (struct rpc_message *msg,
1770 			struct dentry *old_dentry,
1771 			struct dentry *new_dentry);
1772 	void	(*rename_rpc_prepare)(struct rpc_task *task, struct nfs_renamedata *);
1773 	int	(*rename_done) (struct rpc_task *task, struct inode *old_dir, struct inode *new_dir);
1774 	int	(*link)    (struct inode *, struct inode *, const struct qstr *);
1775 	int	(*symlink) (struct inode *, struct dentry *, struct page *,
1776 			    unsigned int, struct iattr *);
1777 	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
1778 	int	(*rmdir)   (struct inode *, const struct qstr *);
1779 	int	(*readdir) (struct nfs_readdir_arg *, struct nfs_readdir_res *);
1780 	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
1781 			    dev_t);
1782 	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
1783 			    struct nfs_fsstat *);
1784 	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,
1785 			    struct nfs_fsinfo *);
1786 	int	(*pathconf) (struct nfs_server *, struct nfs_fh *,
1787 			     struct nfs_pathconf *);
1788 	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
1789 	int	(*decode_dirent)(struct xdr_stream *, struct nfs_entry *, bool);
1790 	int	(*pgio_rpc_prepare)(struct rpc_task *,
1791 				    struct nfs_pgio_header *);
1792 	void	(*read_setup)(struct nfs_pgio_header *, struct rpc_message *);
1793 	int	(*read_done)(struct rpc_task *, struct nfs_pgio_header *);
1794 	void	(*write_setup)(struct nfs_pgio_header *, struct rpc_message *,
1795 				struct rpc_clnt **);
1796 	int	(*write_done)(struct rpc_task *, struct nfs_pgio_header *);
1797 	void	(*commit_setup) (struct nfs_commit_data *, struct rpc_message *,
1798 				struct rpc_clnt **);
1799 	void	(*commit_rpc_prepare)(struct rpc_task *, struct nfs_commit_data *);
1800 	int	(*commit_done) (struct rpc_task *, struct nfs_commit_data *);
1801 	int	(*lock)(struct file *, int, struct file_lock *);
1802 	int	(*lock_check_bounds)(const struct file_lock *);
1803 	void	(*clear_acl_cache)(struct inode *);
1804 	void	(*close_context)(struct nfs_open_context *ctx, int);
1805 	struct inode * (*open_context) (struct inode *dir,
1806 				struct nfs_open_context *ctx,
1807 				int open_flags,
1808 				struct iattr *iattr,
1809 				int *);
1810 	int (*have_delegation)(struct inode *, fmode_t);
1811 	struct nfs_client *(*alloc_client) (const struct nfs_client_initdata *);
1812 	struct nfs_client *(*init_client) (struct nfs_client *,
1813 				const struct nfs_client_initdata *);
1814 	void	(*free_client) (struct nfs_client *);
1815 	struct nfs_server *(*create_server)(struct fs_context *);
1816 	struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *,
1817 					   struct nfs_fattr *, rpc_authflavor_t);
1818 	int	(*discover_trunking)(struct nfs_server *, struct nfs_fh *);
1819 	void	(*enable_swap)(struct inode *inode);
1820 	void	(*disable_swap)(struct inode *inode);
1821 };
1822 
1823 /*
1824  * 	NFS_CALL(getattr, inode, (fattr));
1825  * into
1826  *	NFS_PROTO(inode)->getattr(fattr);
1827  */
1828 #define NFS_CALL(op, inode, args)	NFS_PROTO(inode)->op args
1829 
1830 /*
1831  * Function vectors etc. for the NFS client
1832  */
1833 extern const struct nfs_rpc_ops	nfs_v2_clientops;
1834 extern const struct nfs_rpc_ops	nfs_v3_clientops;
1835 extern const struct nfs_rpc_ops	nfs_v4_clientops;
1836 extern const struct rpc_version nfs_version2;
1837 extern const struct rpc_version nfs_version3;
1838 extern const struct rpc_version nfs_version4;
1839 
1840 extern const struct rpc_version nfsacl_version3;
1841 extern const struct rpc_program nfsacl_program;
1842 
1843 #endif
1844