xref: /linux-6.15/include/linux/nfs_xdr.h (revision 7a2d19bc) 
1 #ifndef _LINUX_NFS_XDR_H
2 #define _LINUX_NFS_XDR_H
3 
4 #include <linux/nfsacl.h>
5 #include <linux/nfs3.h>
6 
7 /*
8  * To change the maximum rsize and wsize supported by the NFS client, adjust
9  * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
10  * support a megabyte or more.  The default is left at 4096 bytes, which is
11  * reasonable for NFS over UDP.
12  */
13 #define NFS_MAX_FILE_IO_SIZE	(1048576U)
14 #define NFS_DEF_FILE_IO_SIZE	(4096U)
15 #define NFS_MIN_FILE_IO_SIZE	(1024U)
16 
17 struct nfs_fsid {
18 	uint64_t		major;
19 	uint64_t		minor;
20 };
21 
22 /*
23  * Helper for checking equality between 2 fsids.
24  */
25 static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
26 {
27 	return a->major == b->major && a->minor == b->minor;
28 }
29 
30 struct nfs_fattr {
31 	unsigned int		valid;		/* which fields are valid */
32 	umode_t			mode;
33 	__u32			nlink;
34 	__u32			uid;
35 	__u32			gid;
36 	dev_t			rdev;
37 	__u64			size;
38 	union {
39 		struct {
40 			__u32	blocksize;
41 			__u32	blocks;
42 		} nfs2;
43 		struct {
44 			__u64	used;
45 		} nfs3;
46 	} du;
47 	struct nfs_fsid		fsid;
48 	__u64			fileid;
49 	struct timespec		atime;
50 	struct timespec		mtime;
51 	struct timespec		ctime;
52 	__u64			change_attr;	/* NFSv4 change attribute */
53 	__u64			pre_change_attr;/* pre-op NFSv4 change attribute */
54 	__u64			pre_size;	/* pre_op_attr.size	  */
55 	struct timespec		pre_mtime;	/* pre_op_attr.mtime	  */
56 	struct timespec		pre_ctime;	/* pre_op_attr.ctime	  */
57 	unsigned long		time_start;
58 	unsigned long		gencount;
59 };
60 
61 #define NFS_ATTR_FATTR_TYPE		(1U << 0)
62 #define NFS_ATTR_FATTR_MODE		(1U << 1)
63 #define NFS_ATTR_FATTR_NLINK		(1U << 2)
64 #define NFS_ATTR_FATTR_OWNER		(1U << 3)
65 #define NFS_ATTR_FATTR_GROUP		(1U << 4)
66 #define NFS_ATTR_FATTR_RDEV		(1U << 5)
67 #define NFS_ATTR_FATTR_SIZE		(1U << 6)
68 #define NFS_ATTR_FATTR_PRESIZE		(1U << 7)
69 #define NFS_ATTR_FATTR_BLOCKS_USED	(1U << 8)
70 #define NFS_ATTR_FATTR_SPACE_USED	(1U << 9)
71 #define NFS_ATTR_FATTR_FSID		(1U << 10)
72 #define NFS_ATTR_FATTR_FILEID		(1U << 11)
73 #define NFS_ATTR_FATTR_ATIME		(1U << 12)
74 #define NFS_ATTR_FATTR_MTIME		(1U << 13)
75 #define NFS_ATTR_FATTR_CTIME		(1U << 14)
76 #define NFS_ATTR_FATTR_PREMTIME		(1U << 15)
77 #define NFS_ATTR_FATTR_PRECTIME		(1U << 16)
78 #define NFS_ATTR_FATTR_CHANGE		(1U << 17)
79 #define NFS_ATTR_FATTR_PRECHANGE	(1U << 18)
80 #define NFS_ATTR_FATTR_V4_REFERRAL	(1U << 19)	/* NFSv4 referral */
81 
82 #define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
83 		| NFS_ATTR_FATTR_MODE \
84 		| NFS_ATTR_FATTR_NLINK \
85 		| NFS_ATTR_FATTR_OWNER \
86 		| NFS_ATTR_FATTR_GROUP \
87 		| NFS_ATTR_FATTR_RDEV \
88 		| NFS_ATTR_FATTR_SIZE \
89 		| NFS_ATTR_FATTR_FSID \
90 		| NFS_ATTR_FATTR_FILEID \
91 		| NFS_ATTR_FATTR_ATIME \
92 		| NFS_ATTR_FATTR_MTIME \
93 		| NFS_ATTR_FATTR_CTIME)
94 #define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \
95 		| NFS_ATTR_FATTR_BLOCKS_USED)
96 #define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
97 		| NFS_ATTR_FATTR_SPACE_USED)
98 #define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
99 		| NFS_ATTR_FATTR_SPACE_USED \
100 		| NFS_ATTR_FATTR_CHANGE)
101 
102 /*
103  * Info on the file system
104  */
105 struct nfs_fsinfo {
106 	struct nfs_fattr	*fattr; /* Post-op attributes */
107 	__u32			rtmax;	/* max.  read transfer size */
108 	__u32			rtpref;	/* pref. read transfer size */
109 	__u32			rtmult;	/* reads should be multiple of this */
110 	__u32			wtmax;	/* max.  write transfer size */
111 	__u32			wtpref;	/* pref. write transfer size */
112 	__u32			wtmult;	/* writes should be multiple of this */
113 	__u32			dtpref;	/* pref. readdir transfer size */
114 	__u64			maxfilesize;
115 	struct timespec		time_delta; /* server time granularity */
116 	__u32			lease_time; /* in seconds */
117 	__u32			layouttype; /* supported pnfs layout driver */
118 };
119 
120 struct nfs_fsstat {
121 	struct nfs_fattr	*fattr; /* Post-op attributes */
122 	__u64			tbytes;	/* total size in bytes */
123 	__u64			fbytes;	/* # of free bytes */
124 	__u64			abytes;	/* # of bytes available to user */
125 	__u64			tfiles;	/* # of files */
126 	__u64			ffiles;	/* # of free files */
127 	__u64			afiles;	/* # of files available to user */
128 };
129 
130 struct nfs2_fsstat {
131 	__u32			tsize;  /* Server transfer size */
132 	__u32			bsize;  /* Filesystem block size */
133 	__u32			blocks; /* No. of "bsize" blocks on filesystem */
134 	__u32			bfree;  /* No. of free "bsize" blocks */
135 	__u32			bavail; /* No. of available "bsize" blocks */
136 };
137 
138 struct nfs_pathconf {
139 	struct nfs_fattr	*fattr; /* Post-op attributes */
140 	__u32			max_link; /* max # of hard links */
141 	__u32			max_namelen; /* max name length */
142 };
143 
144 struct nfs4_change_info {
145 	u32			atomic;
146 	u64			before;
147 	u64			after;
148 };
149 
150 struct nfs_seqid;
151 
152 /* nfs41 sessions channel attributes */
153 struct nfs4_channel_attrs {
154 	u32			headerpadsz;
155 	u32			max_rqst_sz;
156 	u32			max_resp_sz;
157 	u32			max_resp_sz_cached;
158 	u32			max_ops;
159 	u32			max_reqs;
160 };
161 
162 /* nfs41 sessions slot seqid */
163 struct nfs4_slot {
164 	u32		 	seq_nr;
165 };
166 
167 struct nfs4_sequence_args {
168 	struct nfs4_session	*sa_session;
169 	u8			sa_slotid;
170 	u8			sa_cache_this;
171 };
172 
173 struct nfs4_sequence_res {
174 	struct nfs4_session	*sr_session;
175 	struct nfs4_slot	*sr_slot;	/* slot used to send request */
176 	int			sr_status;	/* sequence operation status */
177 	unsigned long		sr_renewal_time;
178 	u32			sr_status_flags;
179 };
180 
181 struct nfs4_get_lease_time_args {
182 	struct nfs4_sequence_args	la_seq_args;
183 };
184 
185 struct nfs4_get_lease_time_res {
186 	struct nfs_fsinfo	       *lr_fsinfo;
187 	struct nfs4_sequence_res	lr_seq_res;
188 };
189 
190 #define PNFS_LAYOUT_MAXSIZE 4096
191 
192 struct nfs4_layoutdriver_data {
193 	__u32 len;
194 	void *buf;
195 };
196 
197 struct pnfs_layout_range {
198 	u32 iomode;
199 	u64 offset;
200 	u64 length;
201 };
202 
203 struct nfs4_layoutget_args {
204 	__u32 type;
205 	struct pnfs_layout_range range;
206 	__u64 minlength;
207 	__u32 maxcount;
208 	struct inode *inode;
209 	struct nfs_open_context *ctx;
210 	struct nfs4_sequence_args seq_args;
211 };
212 
213 struct nfs4_layoutget_res {
214 	__u32 return_on_close;
215 	struct pnfs_layout_range range;
216 	__u32 type;
217 	nfs4_stateid stateid;
218 	struct nfs4_layoutdriver_data layout;
219 	struct nfs4_sequence_res seq_res;
220 };
221 
222 struct nfs4_layoutget {
223 	struct nfs4_layoutget_args args;
224 	struct nfs4_layoutget_res res;
225 	struct pnfs_layout_segment **lsegpp;
226 	int status;
227 };
228 
229 struct nfs4_getdeviceinfo_args {
230 	struct pnfs_device *pdev;
231 	struct nfs4_sequence_args seq_args;
232 };
233 
234 struct nfs4_getdeviceinfo_res {
235 	struct pnfs_device *pdev;
236 	struct nfs4_sequence_res seq_res;
237 };
238 
239 /*
240  * Arguments to the open call.
241  */
242 struct nfs_openargs {
243 	const struct nfs_fh *	fh;
244 	struct nfs_seqid *	seqid;
245 	int			open_flags;
246 	fmode_t			fmode;
247 	__u64                   clientid;
248 	__u64                   id;
249 	union {
250 		struct {
251 			struct iattr *  attrs;    /* UNCHECKED, GUARDED */
252 			nfs4_verifier   verifier; /* EXCLUSIVE */
253 		};
254 		nfs4_stateid	delegation;		/* CLAIM_DELEGATE_CUR */
255 		fmode_t		delegation_type;	/* CLAIM_PREVIOUS */
256 	} u;
257 	const struct qstr *	name;
258 	const struct nfs_server *server;	 /* Needed for ID mapping */
259 	const u32 *		bitmask;
260 	__u32			claim;
261 	struct nfs4_sequence_args	seq_args;
262 };
263 
264 struct nfs_openres {
265 	nfs4_stateid            stateid;
266 	struct nfs_fh           fh;
267 	struct nfs4_change_info	cinfo;
268 	__u32                   rflags;
269 	struct nfs_fattr *      f_attr;
270 	struct nfs_fattr *      dir_attr;
271 	struct nfs_seqid *	seqid;
272 	const struct nfs_server *server;
273 	fmode_t			delegation_type;
274 	nfs4_stateid		delegation;
275 	__u32			do_recall;
276 	__u64			maxsize;
277 	__u32			attrset[NFS4_BITMAP_SIZE];
278 	struct nfs4_sequence_res	seq_res;
279 };
280 
281 /*
282  * Arguments to the open_confirm call.
283  */
284 struct nfs_open_confirmargs {
285 	const struct nfs_fh *	fh;
286 	nfs4_stateid *		stateid;
287 	struct nfs_seqid *	seqid;
288 };
289 
290 struct nfs_open_confirmres {
291 	nfs4_stateid            stateid;
292 	struct nfs_seqid *	seqid;
293 };
294 
295 /*
296  * Arguments to the close call.
297  */
298 struct nfs_closeargs {
299 	struct nfs_fh *         fh;
300 	nfs4_stateid *		stateid;
301 	struct nfs_seqid *	seqid;
302 	fmode_t			fmode;
303 	const u32 *		bitmask;
304 	struct nfs4_sequence_args	seq_args;
305 };
306 
307 struct nfs_closeres {
308 	nfs4_stateid            stateid;
309 	struct nfs_fattr *	fattr;
310 	struct nfs_seqid *	seqid;
311 	const struct nfs_server *server;
312 	struct nfs4_sequence_res	seq_res;
313 };
314 /*
315  *  * Arguments to the lock,lockt, and locku call.
316  *   */
317 struct nfs_lowner {
318 	__u64			clientid;
319 	__u64			id;
320 };
321 
322 struct nfs_lock_args {
323 	struct nfs_fh *		fh;
324 	struct file_lock *	fl;
325 	struct nfs_seqid *	lock_seqid;
326 	nfs4_stateid *		lock_stateid;
327 	struct nfs_seqid *	open_seqid;
328 	nfs4_stateid *		open_stateid;
329 	struct nfs_lowner	lock_owner;
330 	unsigned char		block : 1;
331 	unsigned char		reclaim : 1;
332 	unsigned char		new_lock_owner : 1;
333 	struct nfs4_sequence_args	seq_args;
334 };
335 
336 struct nfs_lock_res {
337 	nfs4_stateid		stateid;
338 	struct nfs_seqid *	lock_seqid;
339 	struct nfs_seqid *	open_seqid;
340 	struct nfs4_sequence_res	seq_res;
341 };
342 
343 struct nfs_locku_args {
344 	struct nfs_fh *		fh;
345 	struct file_lock *	fl;
346 	struct nfs_seqid *	seqid;
347 	nfs4_stateid *		stateid;
348 	struct nfs4_sequence_args	seq_args;
349 };
350 
351 struct nfs_locku_res {
352 	nfs4_stateid		stateid;
353 	struct nfs_seqid *	seqid;
354 	struct nfs4_sequence_res	seq_res;
355 };
356 
357 struct nfs_lockt_args {
358 	struct nfs_fh *		fh;
359 	struct file_lock *	fl;
360 	struct nfs_lowner	lock_owner;
361 	struct nfs4_sequence_args	seq_args;
362 };
363 
364 struct nfs_lockt_res {
365 	struct file_lock *	denied; /* LOCK, LOCKT failed */
366 	struct nfs4_sequence_res	seq_res;
367 };
368 
369 struct nfs_release_lockowner_args {
370 	struct nfs_lowner	lock_owner;
371 };
372 
373 struct nfs4_delegreturnargs {
374 	const struct nfs_fh *fhandle;
375 	const nfs4_stateid *stateid;
376 	const u32 * bitmask;
377 	struct nfs4_sequence_args	seq_args;
378 };
379 
380 struct nfs4_delegreturnres {
381 	struct nfs_fattr * fattr;
382 	const struct nfs_server *server;
383 	struct nfs4_sequence_res	seq_res;
384 };
385 
386 /*
387  * Arguments to the read call.
388  */
389 struct nfs_readargs {
390 	struct nfs_fh *		fh;
391 	struct nfs_open_context *context;
392 	struct nfs_lock_context *lock_context;
393 	__u64			offset;
394 	__u32			count;
395 	unsigned int		pgbase;
396 	struct page **		pages;
397 	struct nfs4_sequence_args	seq_args;
398 };
399 
400 struct nfs_readres {
401 	struct nfs_fattr *	fattr;
402 	__u32			count;
403 	int                     eof;
404 	struct nfs4_sequence_res	seq_res;
405 };
406 
407 /*
408  * Arguments to the write call.
409  */
410 struct nfs_writeargs {
411 	struct nfs_fh *		fh;
412 	struct nfs_open_context *context;
413 	struct nfs_lock_context *lock_context;
414 	__u64			offset;
415 	__u32			count;
416 	enum nfs3_stable_how	stable;
417 	unsigned int		pgbase;
418 	struct page **		pages;
419 	const u32 *		bitmask;
420 	struct nfs4_sequence_args	seq_args;
421 };
422 
423 struct nfs_writeverf {
424 	enum nfs3_stable_how	committed;
425 	__be32			verifier[2];
426 };
427 
428 struct nfs_writeres {
429 	struct nfs_fattr *	fattr;
430 	struct nfs_writeverf *	verf;
431 	__u32			count;
432 	const struct nfs_server *server;
433 	struct nfs4_sequence_res	seq_res;
434 };
435 
436 /*
437  * Common arguments to the unlink call
438  */
439 struct nfs_removeargs {
440 	const struct nfs_fh	*fh;
441 	struct qstr		name;
442 	const u32 *		bitmask;
443 	struct nfs4_sequence_args	seq_args;
444 };
445 
446 struct nfs_removeres {
447 	const struct nfs_server *server;
448 	struct nfs_fattr	*dir_attr;
449 	struct nfs4_change_info	cinfo;
450 	struct nfs4_sequence_res 	seq_res;
451 };
452 
453 /*
454  * Common arguments to the rename call
455  */
456 struct nfs_renameargs {
457 	const struct nfs_fh		*old_dir;
458 	const struct nfs_fh		*new_dir;
459 	const struct qstr		*old_name;
460 	const struct qstr		*new_name;
461 	const u32			*bitmask;
462 	struct nfs4_sequence_args	seq_args;
463 };
464 
465 struct nfs_renameres {
466 	const struct nfs_server		*server;
467 	struct nfs4_change_info		old_cinfo;
468 	struct nfs_fattr		*old_fattr;
469 	struct nfs4_change_info		new_cinfo;
470 	struct nfs_fattr		*new_fattr;
471 	struct nfs4_sequence_res	seq_res;
472 };
473 
474 /*
475  * Argument struct for decode_entry function
476  */
477 struct nfs_entry {
478 	__u64			ino;
479 	__u64			cookie,
480 				prev_cookie;
481 	const char *		name;
482 	unsigned int		len;
483 	int			eof;
484 	struct nfs_fh *		fh;
485 	struct nfs_fattr *	fattr;
486 	unsigned char		d_type;
487 };
488 
489 /*
490  * The following types are for NFSv2 only.
491  */
492 struct nfs_sattrargs {
493 	struct nfs_fh *		fh;
494 	struct iattr *		sattr;
495 };
496 
497 struct nfs_diropargs {
498 	struct nfs_fh *		fh;
499 	const char *		name;
500 	unsigned int		len;
501 };
502 
503 struct nfs_createargs {
504 	struct nfs_fh *		fh;
505 	const char *		name;
506 	unsigned int		len;
507 	struct iattr *		sattr;
508 };
509 
510 struct nfs_setattrargs {
511 	struct nfs_fh *                 fh;
512 	nfs4_stateid                    stateid;
513 	struct iattr *                  iap;
514 	const struct nfs_server *	server; /* Needed for name mapping */
515 	const u32 *			bitmask;
516 	struct nfs4_sequence_args 	seq_args;
517 };
518 
519 struct nfs_setaclargs {
520 	struct nfs_fh *			fh;
521 	size_t				acl_len;
522 	unsigned int			acl_pgbase;
523 	struct page **			acl_pages;
524 	struct nfs4_sequence_args	seq_args;
525 };
526 
527 struct nfs_setaclres {
528 	struct nfs4_sequence_res	seq_res;
529 };
530 
531 struct nfs_getaclargs {
532 	struct nfs_fh *			fh;
533 	size_t				acl_len;
534 	unsigned int			acl_pgbase;
535 	struct page **			acl_pages;
536 	struct nfs4_sequence_args 	seq_args;
537 };
538 
539 struct nfs_getaclres {
540 	size_t				acl_len;
541 	struct nfs4_sequence_res	seq_res;
542 };
543 
544 struct nfs_setattrres {
545 	struct nfs_fattr *              fattr;
546 	const struct nfs_server *	server;
547 	struct nfs4_sequence_res	seq_res;
548 };
549 
550 struct nfs_linkargs {
551 	struct nfs_fh *		fromfh;
552 	struct nfs_fh *		tofh;
553 	const char *		toname;
554 	unsigned int		tolen;
555 };
556 
557 struct nfs_symlinkargs {
558 	struct nfs_fh *		fromfh;
559 	const char *		fromname;
560 	unsigned int		fromlen;
561 	struct page **		pages;
562 	unsigned int		pathlen;
563 	struct iattr *		sattr;
564 };
565 
566 struct nfs_readdirargs {
567 	struct nfs_fh *		fh;
568 	__u32			cookie;
569 	unsigned int		count;
570 	struct page **		pages;
571 };
572 
573 struct nfs3_getaclargs {
574 	struct nfs_fh *		fh;
575 	int			mask;
576 	struct page **		pages;
577 };
578 
579 struct nfs3_setaclargs {
580 	struct inode *		inode;
581 	int			mask;
582 	struct posix_acl *	acl_access;
583 	struct posix_acl *	acl_default;
584 	size_t			len;
585 	unsigned int		npages;
586 	struct page **		pages;
587 };
588 
589 struct nfs_diropok {
590 	struct nfs_fh *		fh;
591 	struct nfs_fattr *	fattr;
592 };
593 
594 struct nfs_readlinkargs {
595 	struct nfs_fh *		fh;
596 	unsigned int		pgbase;
597 	unsigned int		pglen;
598 	struct page **		pages;
599 };
600 
601 struct nfs3_sattrargs {
602 	struct nfs_fh *		fh;
603 	struct iattr *		sattr;
604 	unsigned int		guard;
605 	struct timespec		guardtime;
606 };
607 
608 struct nfs3_diropargs {
609 	struct nfs_fh *		fh;
610 	const char *		name;
611 	unsigned int		len;
612 };
613 
614 struct nfs3_accessargs {
615 	struct nfs_fh *		fh;
616 	__u32			access;
617 };
618 
619 struct nfs3_createargs {
620 	struct nfs_fh *		fh;
621 	const char *		name;
622 	unsigned int		len;
623 	struct iattr *		sattr;
624 	enum nfs3_createmode	createmode;
625 	__be32			verifier[2];
626 };
627 
628 struct nfs3_mkdirargs {
629 	struct nfs_fh *		fh;
630 	const char *		name;
631 	unsigned int		len;
632 	struct iattr *		sattr;
633 };
634 
635 struct nfs3_symlinkargs {
636 	struct nfs_fh *		fromfh;
637 	const char *		fromname;
638 	unsigned int		fromlen;
639 	struct page **		pages;
640 	unsigned int		pathlen;
641 	struct iattr *		sattr;
642 };
643 
644 struct nfs3_mknodargs {
645 	struct nfs_fh *		fh;
646 	const char *		name;
647 	unsigned int		len;
648 	enum nfs3_ftype		type;
649 	struct iattr *		sattr;
650 	dev_t			rdev;
651 };
652 
653 struct nfs3_linkargs {
654 	struct nfs_fh *		fromfh;
655 	struct nfs_fh *		tofh;
656 	const char *		toname;
657 	unsigned int		tolen;
658 };
659 
660 struct nfs3_readdirargs {
661 	struct nfs_fh *		fh;
662 	__u64			cookie;
663 	__be32			verf[2];
664 	int			plus;
665 	unsigned int            count;
666 	struct page **		pages;
667 };
668 
669 struct nfs3_diropres {
670 	struct nfs_fattr *	dir_attr;
671 	struct nfs_fh *		fh;
672 	struct nfs_fattr *	fattr;
673 };
674 
675 struct nfs3_accessres {
676 	struct nfs_fattr *	fattr;
677 	__u32			access;
678 };
679 
680 struct nfs3_readlinkargs {
681 	struct nfs_fh *		fh;
682 	unsigned int		pgbase;
683 	unsigned int		pglen;
684 	struct page **		pages;
685 };
686 
687 struct nfs3_linkres {
688 	struct nfs_fattr *	dir_attr;
689 	struct nfs_fattr *	fattr;
690 };
691 
692 struct nfs3_readdirres {
693 	struct nfs_fattr *	dir_attr;
694 	__be32 *		verf;
695 	int			plus;
696 };
697 
698 struct nfs3_getaclres {
699 	struct nfs_fattr *	fattr;
700 	int			mask;
701 	unsigned int		acl_access_count;
702 	unsigned int		acl_default_count;
703 	struct posix_acl *	acl_access;
704 	struct posix_acl *	acl_default;
705 };
706 
707 #ifdef CONFIG_NFS_V4
708 
709 typedef u64 clientid4;
710 
711 struct nfs4_accessargs {
712 	const struct nfs_fh *		fh;
713 	const u32 *			bitmask;
714 	u32				access;
715 	struct nfs4_sequence_args	seq_args;
716 };
717 
718 struct nfs4_accessres {
719 	const struct nfs_server *	server;
720 	struct nfs_fattr *		fattr;
721 	u32				supported;
722 	u32				access;
723 	struct nfs4_sequence_res	seq_res;
724 };
725 
726 struct nfs4_create_arg {
727 	u32				ftype;
728 	union {
729 		struct {
730 			struct page **	pages;
731 			unsigned int	len;
732 		} symlink;   /* NF4LNK */
733 		struct {
734 			u32		specdata1;
735 			u32		specdata2;
736 		} device;    /* NF4BLK, NF4CHR */
737 	} u;
738 	const struct qstr *		name;
739 	const struct nfs_server *	server;
740 	const struct iattr *		attrs;
741 	const struct nfs_fh *		dir_fh;
742 	const u32 *			bitmask;
743 	struct nfs4_sequence_args 	seq_args;
744 };
745 
746 struct nfs4_create_res {
747 	const struct nfs_server *	server;
748 	struct nfs_fh *			fh;
749 	struct nfs_fattr *		fattr;
750 	struct nfs4_change_info		dir_cinfo;
751 	struct nfs_fattr *		dir_fattr;
752 	struct nfs4_sequence_res	seq_res;
753 };
754 
755 struct nfs4_fsinfo_arg {
756 	const struct nfs_fh *		fh;
757 	const u32 *			bitmask;
758 	struct nfs4_sequence_args	seq_args;
759 };
760 
761 struct nfs4_fsinfo_res {
762 	struct nfs_fsinfo	       *fsinfo;
763 	struct nfs4_sequence_res	seq_res;
764 };
765 
766 struct nfs4_getattr_arg {
767 	const struct nfs_fh *		fh;
768 	const u32 *			bitmask;
769 	struct nfs4_sequence_args	seq_args;
770 };
771 
772 struct nfs4_getattr_res {
773 	const struct nfs_server *	server;
774 	struct nfs_fattr *		fattr;
775 	struct nfs4_sequence_res	seq_res;
776 };
777 
778 struct nfs4_link_arg {
779 	const struct nfs_fh *		fh;
780 	const struct nfs_fh *		dir_fh;
781 	const struct qstr *		name;
782 	const u32 *			bitmask;
783 	struct nfs4_sequence_args 	seq_args;
784 };
785 
786 struct nfs4_link_res {
787 	const struct nfs_server *	server;
788 	struct nfs_fattr *		fattr;
789 	struct nfs4_change_info		cinfo;
790 	struct nfs_fattr *		dir_attr;
791 	struct nfs4_sequence_res	seq_res;
792 };
793 
794 
795 struct nfs4_lookup_arg {
796 	const struct nfs_fh *		dir_fh;
797 	const struct qstr *		name;
798 	const u32 *			bitmask;
799 	struct nfs4_sequence_args	seq_args;
800 };
801 
802 struct nfs4_lookup_res {
803 	const struct nfs_server *	server;
804 	struct nfs_fattr *		fattr;
805 	struct nfs_fh *			fh;
806 	struct nfs4_sequence_res	seq_res;
807 };
808 
809 struct nfs4_lookup_root_arg {
810 	const u32 *			bitmask;
811 	struct nfs4_sequence_args	seq_args;
812 };
813 
814 struct nfs4_pathconf_arg {
815 	const struct nfs_fh *		fh;
816 	const u32 *			bitmask;
817 	struct nfs4_sequence_args	seq_args;
818 };
819 
820 struct nfs4_pathconf_res {
821 	struct nfs_pathconf	       *pathconf;
822 	struct nfs4_sequence_res	seq_res;
823 };
824 
825 struct nfs4_readdir_arg {
826 	const struct nfs_fh *		fh;
827 	u64				cookie;
828 	nfs4_verifier			verifier;
829 	u32				count;
830 	struct page **			pages;	/* zero-copy data */
831 	unsigned int			pgbase;	/* zero-copy data */
832 	const u32 *			bitmask;
833 	int				plus;
834 	struct nfs4_sequence_args	seq_args;
835 };
836 
837 struct nfs4_readdir_res {
838 	nfs4_verifier			verifier;
839 	unsigned int			pgbase;
840 	struct nfs4_sequence_res	seq_res;
841 };
842 
843 struct nfs4_readlink {
844 	const struct nfs_fh *		fh;
845 	unsigned int			pgbase;
846 	unsigned int			pglen;   /* zero-copy data */
847 	struct page **			pages;   /* zero-copy data */
848 	struct nfs4_sequence_args	seq_args;
849 };
850 
851 struct nfs4_readlink_res {
852 	struct nfs4_sequence_res	seq_res;
853 };
854 
855 #define NFS4_SETCLIENTID_NAMELEN	(127)
856 struct nfs4_setclientid {
857 	const nfs4_verifier *		sc_verifier;
858 	unsigned int			sc_name_len;
859 	char				sc_name[NFS4_SETCLIENTID_NAMELEN + 1];
860 	u32				sc_prog;
861 	unsigned int			sc_netid_len;
862 	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
863 	unsigned int			sc_uaddr_len;
864 	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
865 	u32				sc_cb_ident;
866 };
867 
868 struct nfs4_setclientid_res {
869 	u64				clientid;
870 	nfs4_verifier			confirm;
871 };
872 
873 struct nfs4_statfs_arg {
874 	const struct nfs_fh *		fh;
875 	const u32 *			bitmask;
876 	struct nfs4_sequence_args	seq_args;
877 };
878 
879 struct nfs4_statfs_res {
880 	struct nfs_fsstat	       *fsstat;
881 	struct nfs4_sequence_res	seq_res;
882 };
883 
884 struct nfs4_server_caps_arg {
885 	struct nfs_fh		       *fhandle;
886 	struct nfs4_sequence_args	seq_args;
887 };
888 
889 struct nfs4_server_caps_res {
890 	u32				attr_bitmask[2];
891 	u32				acl_bitmask;
892 	u32				has_links;
893 	u32				has_symlinks;
894 	struct nfs4_sequence_res	seq_res;
895 };
896 
897 struct nfs4_string {
898 	unsigned int len;
899 	char *data;
900 };
901 
902 #define NFS4_PATHNAME_MAXCOMPONENTS 512
903 struct nfs4_pathname {
904 	unsigned int ncomponents;
905 	struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
906 };
907 
908 #define NFS4_FS_LOCATION_MAXSERVERS 10
909 struct nfs4_fs_location {
910 	unsigned int nservers;
911 	struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
912 	struct nfs4_pathname rootpath;
913 };
914 
915 #define NFS4_FS_LOCATIONS_MAXENTRIES 10
916 struct nfs4_fs_locations {
917 	struct nfs_fattr fattr;
918 	const struct nfs_server *server;
919 	struct nfs4_pathname fs_path;
920 	int nlocations;
921 	struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
922 };
923 
924 struct nfs4_fs_locations_arg {
925 	const struct nfs_fh *dir_fh;
926 	const struct qstr *name;
927 	struct page *page;
928 	const u32 *bitmask;
929 	struct nfs4_sequence_args	seq_args;
930 };
931 
932 struct nfs4_fs_locations_res {
933 	struct nfs4_fs_locations       *fs_locations;
934 	struct nfs4_sequence_res	seq_res;
935 };
936 
937 #endif /* CONFIG_NFS_V4 */
938 
939 struct nfstime4 {
940 	u64	seconds;
941 	u32	nseconds;
942 };
943 
944 #ifdef CONFIG_NFS_V4_1
945 struct nfs_impl_id4 {
946 	u32		domain_len;
947 	char		*domain;
948 	u32		name_len;
949 	char		*name;
950 	struct nfstime4	date;
951 };
952 
953 #define NFS4_EXCHANGE_ID_LEN	(48)
954 struct nfs41_exchange_id_args {
955 	struct nfs_client		*client;
956 	nfs4_verifier			*verifier;
957 	unsigned int 			id_len;
958 	char 				id[NFS4_EXCHANGE_ID_LEN];
959 	u32				flags;
960 };
961 
962 struct server_owner {
963 	uint64_t			minor_id;
964 	uint32_t			major_id_sz;
965 	char				major_id[NFS4_OPAQUE_LIMIT];
966 };
967 
968 struct server_scope {
969 	uint32_t			server_scope_sz;
970 	char 				server_scope[NFS4_OPAQUE_LIMIT];
971 };
972 
973 struct nfs41_exchange_id_res {
974 	struct nfs_client		*client;
975 	u32				flags;
976 };
977 
978 struct nfs41_create_session_args {
979 	struct nfs_client	       *client;
980 	uint32_t			flags;
981 	uint32_t			cb_program;
982 	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
983 	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
984 };
985 
986 struct nfs41_create_session_res {
987 	struct nfs_client	       *client;
988 };
989 
990 struct nfs41_reclaim_complete_args {
991 	/* In the future extend to include curr_fh for use with migration */
992 	unsigned char			one_fs:1;
993 	struct nfs4_sequence_args	seq_args;
994 };
995 
996 struct nfs41_reclaim_complete_res {
997 	struct nfs4_sequence_res	seq_res;
998 };
999 #endif /* CONFIG_NFS_V4_1 */
1000 
1001 struct nfs_page;
1002 
1003 #define NFS_PAGEVEC_SIZE	(8U)
1004 
1005 struct nfs_read_data {
1006 	int			flags;
1007 	struct rpc_task		task;
1008 	struct inode		*inode;
1009 	struct rpc_cred		*cred;
1010 	struct nfs_fattr	fattr;	/* fattr storage */
1011 	struct list_head	pages;	/* Coalesced read requests */
1012 	struct nfs_page		*req;	/* multi ops per nfs_page */
1013 	struct page		**pagevec;
1014 	unsigned int		npages;	/* Max length of pagevec */
1015 	struct nfs_readargs args;
1016 	struct nfs_readres  res;
1017 #ifdef CONFIG_NFS_V4
1018 	unsigned long		timestamp;	/* For lease renewal */
1019 #endif
1020 	struct page		*page_array[NFS_PAGEVEC_SIZE];
1021 };
1022 
1023 struct nfs_write_data {
1024 	int			flags;
1025 	struct rpc_task		task;
1026 	struct inode		*inode;
1027 	struct rpc_cred		*cred;
1028 	struct nfs_fattr	fattr;
1029 	struct nfs_writeverf	verf;
1030 	struct list_head	pages;		/* Coalesced requests we wish to flush */
1031 	struct nfs_page		*req;		/* multi ops per nfs_page */
1032 	struct page		**pagevec;
1033 	unsigned int		npages;		/* Max length of pagevec */
1034 	struct nfs_writeargs	args;		/* argument struct */
1035 	struct nfs_writeres	res;		/* result struct */
1036 #ifdef CONFIG_NFS_V4
1037 	unsigned long		timestamp;	/* For lease renewal */
1038 #endif
1039 	struct page		*page_array[NFS_PAGEVEC_SIZE];
1040 };
1041 
1042 struct nfs_access_entry;
1043 
1044 /*
1045  * RPC procedure vector for NFSv2/NFSv3 demuxing
1046  */
1047 struct nfs_rpc_ops {
1048 	u32	version;		/* Protocol version */
1049 	const struct dentry_operations *dentry_ops;
1050 	const struct inode_operations *dir_inode_ops;
1051 	const struct inode_operations *file_inode_ops;
1052 
1053 	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
1054 			    struct nfs_fsinfo *);
1055 	int	(*lookupfh)(struct nfs_server *, struct nfs_fh *,
1056 			    struct qstr *, struct nfs_fh *,
1057 			    struct nfs_fattr *);
1058 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
1059 			    struct nfs_fattr *);
1060 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
1061 			    struct iattr *);
1062 	int	(*lookup)  (struct inode *, struct qstr *,
1063 			    struct nfs_fh *, struct nfs_fattr *);
1064 	int	(*access)  (struct inode *, struct nfs_access_entry *);
1065 	int	(*readlink)(struct inode *, struct page *, unsigned int,
1066 			    unsigned int);
1067 	int	(*create)  (struct inode *, struct dentry *,
1068 			    struct iattr *, int, struct nfs_open_context *);
1069 	int	(*remove)  (struct inode *, struct qstr *);
1070 	void	(*unlink_setup)  (struct rpc_message *, struct inode *dir);
1071 	int	(*unlink_done) (struct rpc_task *, struct inode *);
1072 	int	(*rename)  (struct inode *, struct qstr *,
1073 			    struct inode *, struct qstr *);
1074 	void	(*rename_setup)  (struct rpc_message *msg, struct inode *dir);
1075 	int	(*rename_done) (struct rpc_task *task, struct inode *old_dir, struct inode *new_dir);
1076 	int	(*link)    (struct inode *, struct inode *, struct qstr *);
1077 	int	(*symlink) (struct inode *, struct dentry *, struct page *,
1078 			    unsigned int, struct iattr *);
1079 	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
1080 	int	(*rmdir)   (struct inode *, struct qstr *);
1081 	int	(*readdir) (struct dentry *, struct rpc_cred *,
1082 			    u64, struct page **, unsigned int, int);
1083 	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
1084 			    dev_t);
1085 	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
1086 			    struct nfs_fsstat *);
1087 	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,
1088 			    struct nfs_fsinfo *);
1089 	int	(*pathconf) (struct nfs_server *, struct nfs_fh *,
1090 			     struct nfs_pathconf *);
1091 	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
1092 	__be32 *(*decode_dirent)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int plus);
1093 	void	(*read_setup)   (struct nfs_read_data *, struct rpc_message *);
1094 	int	(*read_done)  (struct rpc_task *, struct nfs_read_data *);
1095 	void	(*write_setup)  (struct nfs_write_data *, struct rpc_message *);
1096 	int	(*write_done)  (struct rpc_task *, struct nfs_write_data *);
1097 	void	(*commit_setup) (struct nfs_write_data *, struct rpc_message *);
1098 	int	(*commit_done) (struct rpc_task *, struct nfs_write_data *);
1099 	int	(*lock)(struct file *, int, struct file_lock *);
1100 	int	(*lock_check_bounds)(const struct file_lock *);
1101 	void	(*clear_acl_cache)(struct inode *);
1102 	void	(*close_context)(struct nfs_open_context *ctx, int);
1103 	struct inode * (*open_context) (struct inode *dir,
1104 				struct nfs_open_context *ctx,
1105 				int open_flags,
1106 				struct iattr *iattr);
1107 };
1108 
1109 /*
1110  * 	NFS_CALL(getattr, inode, (fattr));
1111  * into
1112  *	NFS_PROTO(inode)->getattr(fattr);
1113  */
1114 #define NFS_CALL(op, inode, args)	NFS_PROTO(inode)->op args
1115 
1116 /*
1117  * Function vectors etc. for the NFS client
1118  */
1119 extern const struct nfs_rpc_ops	nfs_v2_clientops;
1120 extern const struct nfs_rpc_ops	nfs_v3_clientops;
1121 extern const struct nfs_rpc_ops	nfs_v4_clientops;
1122 extern struct rpc_version	nfs_version2;
1123 extern struct rpc_version	nfs_version3;
1124 extern struct rpc_version	nfs_version4;
1125 
1126 extern struct rpc_version	nfsacl_version3;
1127 extern struct rpc_program	nfsacl_program;
1128 
1129 #endif
1130