xref: /linux-6.15/include/linux/nfs_xdr.h (revision 4e8cec26) 
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 	__u32			lease_time; /* in seconds */
116 };
117 
118 struct nfs_fsstat {
119 	struct nfs_fattr	*fattr; /* Post-op attributes */
120 	__u64			tbytes;	/* total size in bytes */
121 	__u64			fbytes;	/* # of free bytes */
122 	__u64			abytes;	/* # of bytes available to user */
123 	__u64			tfiles;	/* # of files */
124 	__u64			ffiles;	/* # of free files */
125 	__u64			afiles;	/* # of files available to user */
126 };
127 
128 struct nfs2_fsstat {
129 	__u32			tsize;  /* Server transfer size */
130 	__u32			bsize;  /* Filesystem block size */
131 	__u32			blocks; /* No. of "bsize" blocks on filesystem */
132 	__u32			bfree;  /* No. of free "bsize" blocks */
133 	__u32			bavail; /* No. of available "bsize" blocks */
134 };
135 
136 struct nfs_pathconf {
137 	struct nfs_fattr	*fattr; /* Post-op attributes */
138 	__u32			max_link; /* max # of hard links */
139 	__u32			max_namelen; /* max name length */
140 };
141 
142 struct nfs4_change_info {
143 	u32			atomic;
144 	u64			before;
145 	u64			after;
146 };
147 
148 struct nfs_seqid;
149 
150 /* nfs41 sessions channel attributes */
151 struct nfs4_channel_attrs {
152 	u32			headerpadsz;
153 	u32			max_rqst_sz;
154 	u32			max_resp_sz;
155 	u32			max_resp_sz_cached;
156 	u32			max_ops;
157 	u32			max_reqs;
158 };
159 
160 /* nfs41 sessions slot seqid */
161 struct nfs4_slot {
162 	u32		 	seq_nr;
163 };
164 
165 struct nfs4_sequence_args {
166 	struct nfs4_session	*sa_session;
167 	u8			sa_slotid;
168 	u8			sa_cache_this;
169 };
170 
171 struct nfs4_sequence_res {
172 	struct nfs4_session	*sr_session;
173 	u8			sr_slotid;	/* slot used to send request */
174 	int			sr_status;	/* sequence operation status */
175 	unsigned long		sr_renewal_time;
176 	u32			sr_status_flags;
177 };
178 
179 struct nfs4_get_lease_time_args {
180 	struct nfs4_sequence_args	la_seq_args;
181 };
182 
183 struct nfs4_get_lease_time_res {
184 	struct nfs_fsinfo	       *lr_fsinfo;
185 	struct nfs4_sequence_res	lr_seq_res;
186 };
187 
188 /*
189  * Arguments to the open call.
190  */
191 struct nfs_openargs {
192 	const struct nfs_fh *	fh;
193 	struct nfs_seqid *	seqid;
194 	int			open_flags;
195 	fmode_t			fmode;
196 	__u64                   clientid;
197 	__u64                   id;
198 	union {
199 		struct {
200 			struct iattr *  attrs;    /* UNCHECKED, GUARDED */
201 			nfs4_verifier   verifier; /* EXCLUSIVE */
202 		};
203 		nfs4_stateid	delegation;		/* CLAIM_DELEGATE_CUR */
204 		fmode_t		delegation_type;	/* CLAIM_PREVIOUS */
205 	} u;
206 	const struct qstr *	name;
207 	const struct nfs_server *server;	 /* Needed for ID mapping */
208 	const u32 *		bitmask;
209 	__u32			claim;
210 	struct nfs4_sequence_args	seq_args;
211 };
212 
213 struct nfs_openres {
214 	nfs4_stateid            stateid;
215 	struct nfs_fh           fh;
216 	struct nfs4_change_info	cinfo;
217 	__u32                   rflags;
218 	struct nfs_fattr *      f_attr;
219 	struct nfs_fattr *      dir_attr;
220 	struct nfs_seqid *	seqid;
221 	const struct nfs_server *server;
222 	fmode_t			delegation_type;
223 	nfs4_stateid		delegation;
224 	__u32			do_recall;
225 	__u64			maxsize;
226 	__u32			attrset[NFS4_BITMAP_SIZE];
227 	struct nfs4_sequence_res	seq_res;
228 };
229 
230 /*
231  * Arguments to the open_confirm call.
232  */
233 struct nfs_open_confirmargs {
234 	const struct nfs_fh *	fh;
235 	nfs4_stateid *		stateid;
236 	struct nfs_seqid *	seqid;
237 };
238 
239 struct nfs_open_confirmres {
240 	nfs4_stateid            stateid;
241 	struct nfs_seqid *	seqid;
242 };
243 
244 /*
245  * Arguments to the close call.
246  */
247 struct nfs_closeargs {
248 	struct nfs_fh *         fh;
249 	nfs4_stateid *		stateid;
250 	struct nfs_seqid *	seqid;
251 	fmode_t			fmode;
252 	const u32 *		bitmask;
253 	struct nfs4_sequence_args	seq_args;
254 };
255 
256 struct nfs_closeres {
257 	nfs4_stateid            stateid;
258 	struct nfs_fattr *	fattr;
259 	struct nfs_seqid *	seqid;
260 	const struct nfs_server *server;
261 	struct nfs4_sequence_res	seq_res;
262 };
263 /*
264  *  * Arguments to the lock,lockt, and locku call.
265  *   */
266 struct nfs_lowner {
267 	__u64			clientid;
268 	__u64			id;
269 };
270 
271 struct nfs_lock_args {
272 	struct nfs_fh *		fh;
273 	struct file_lock *	fl;
274 	struct nfs_seqid *	lock_seqid;
275 	nfs4_stateid *		lock_stateid;
276 	struct nfs_seqid *	open_seqid;
277 	nfs4_stateid *		open_stateid;
278 	struct nfs_lowner	lock_owner;
279 	unsigned char		block : 1;
280 	unsigned char		reclaim : 1;
281 	unsigned char		new_lock_owner : 1;
282 	struct nfs4_sequence_args	seq_args;
283 };
284 
285 struct nfs_lock_res {
286 	nfs4_stateid		stateid;
287 	struct nfs_seqid *	lock_seqid;
288 	struct nfs_seqid *	open_seqid;
289 	struct nfs4_sequence_res	seq_res;
290 };
291 
292 struct nfs_locku_args {
293 	struct nfs_fh *		fh;
294 	struct file_lock *	fl;
295 	struct nfs_seqid *	seqid;
296 	nfs4_stateid *		stateid;
297 	struct nfs4_sequence_args	seq_args;
298 };
299 
300 struct nfs_locku_res {
301 	nfs4_stateid		stateid;
302 	struct nfs_seqid *	seqid;
303 	struct nfs4_sequence_res	seq_res;
304 };
305 
306 struct nfs_lockt_args {
307 	struct nfs_fh *		fh;
308 	struct file_lock *	fl;
309 	struct nfs_lowner	lock_owner;
310 	struct nfs4_sequence_args	seq_args;
311 };
312 
313 struct nfs_lockt_res {
314 	struct file_lock *	denied; /* LOCK, LOCKT failed */
315 	struct nfs4_sequence_res	seq_res;
316 };
317 
318 struct nfs_release_lockowner_args {
319 	struct nfs_lowner	lock_owner;
320 };
321 
322 struct nfs4_delegreturnargs {
323 	const struct nfs_fh *fhandle;
324 	const nfs4_stateid *stateid;
325 	const u32 * bitmask;
326 	struct nfs4_sequence_args	seq_args;
327 };
328 
329 struct nfs4_delegreturnres {
330 	struct nfs_fattr * fattr;
331 	const struct nfs_server *server;
332 	struct nfs4_sequence_res	seq_res;
333 };
334 
335 /*
336  * Arguments to the read call.
337  */
338 struct nfs_readargs {
339 	struct nfs_fh *		fh;
340 	struct nfs_open_context *context;
341 	struct nfs_lock_context *lock_context;
342 	__u64			offset;
343 	__u32			count;
344 	unsigned int		pgbase;
345 	struct page **		pages;
346 	struct nfs4_sequence_args	seq_args;
347 };
348 
349 struct nfs_readres {
350 	struct nfs_fattr *	fattr;
351 	__u32			count;
352 	int                     eof;
353 	struct nfs4_sequence_res	seq_res;
354 };
355 
356 /*
357  * Arguments to the write call.
358  */
359 struct nfs_writeargs {
360 	struct nfs_fh *		fh;
361 	struct nfs_open_context *context;
362 	struct nfs_lock_context *lock_context;
363 	__u64			offset;
364 	__u32			count;
365 	enum nfs3_stable_how	stable;
366 	unsigned int		pgbase;
367 	struct page **		pages;
368 	const u32 *		bitmask;
369 	struct nfs4_sequence_args	seq_args;
370 };
371 
372 struct nfs_writeverf {
373 	enum nfs3_stable_how	committed;
374 	__be32			verifier[2];
375 };
376 
377 struct nfs_writeres {
378 	struct nfs_fattr *	fattr;
379 	struct nfs_writeverf *	verf;
380 	__u32			count;
381 	const struct nfs_server *server;
382 	struct nfs4_sequence_res	seq_res;
383 };
384 
385 /*
386  * Common arguments to the unlink call
387  */
388 struct nfs_removeargs {
389 	const struct nfs_fh	*fh;
390 	struct qstr		name;
391 	const u32 *		bitmask;
392 	struct nfs4_sequence_args	seq_args;
393 };
394 
395 struct nfs_removeres {
396 	const struct nfs_server *server;
397 	struct nfs_fattr	*dir_attr;
398 	struct nfs4_change_info	cinfo;
399 	struct nfs4_sequence_res 	seq_res;
400 };
401 
402 /*
403  * Argument struct for decode_entry function
404  */
405 struct nfs_entry {
406 	__u64			ino;
407 	__u64			cookie,
408 				prev_cookie;
409 	const char *		name;
410 	unsigned int		len;
411 	int			eof;
412 	struct nfs_fh *		fh;
413 	struct nfs_fattr *	fattr;
414 };
415 
416 /*
417  * The following types are for NFSv2 only.
418  */
419 struct nfs_sattrargs {
420 	struct nfs_fh *		fh;
421 	struct iattr *		sattr;
422 };
423 
424 struct nfs_diropargs {
425 	struct nfs_fh *		fh;
426 	const char *		name;
427 	unsigned int		len;
428 };
429 
430 struct nfs_createargs {
431 	struct nfs_fh *		fh;
432 	const char *		name;
433 	unsigned int		len;
434 	struct iattr *		sattr;
435 };
436 
437 struct nfs_renameargs {
438 	struct nfs_fh *		fromfh;
439 	const char *		fromname;
440 	unsigned int		fromlen;
441 	struct nfs_fh *		tofh;
442 	const char *		toname;
443 	unsigned int		tolen;
444 };
445 
446 struct nfs_setattrargs {
447 	struct nfs_fh *                 fh;
448 	nfs4_stateid                    stateid;
449 	struct iattr *                  iap;
450 	const struct nfs_server *	server; /* Needed for name mapping */
451 	const u32 *			bitmask;
452 	struct nfs4_sequence_args 	seq_args;
453 };
454 
455 struct nfs_setaclargs {
456 	struct nfs_fh *			fh;
457 	size_t				acl_len;
458 	unsigned int			acl_pgbase;
459 	struct page **			acl_pages;
460 	struct nfs4_sequence_args	seq_args;
461 };
462 
463 struct nfs_setaclres {
464 	struct nfs4_sequence_res	seq_res;
465 };
466 
467 struct nfs_getaclargs {
468 	struct nfs_fh *			fh;
469 	size_t				acl_len;
470 	unsigned int			acl_pgbase;
471 	struct page **			acl_pages;
472 	struct nfs4_sequence_args 	seq_args;
473 };
474 
475 struct nfs_getaclres {
476 	size_t				acl_len;
477 	struct nfs4_sequence_res	seq_res;
478 };
479 
480 struct nfs_setattrres {
481 	struct nfs_fattr *              fattr;
482 	const struct nfs_server *	server;
483 	struct nfs4_sequence_res	seq_res;
484 };
485 
486 struct nfs_linkargs {
487 	struct nfs_fh *		fromfh;
488 	struct nfs_fh *		tofh;
489 	const char *		toname;
490 	unsigned int		tolen;
491 };
492 
493 struct nfs_symlinkargs {
494 	struct nfs_fh *		fromfh;
495 	const char *		fromname;
496 	unsigned int		fromlen;
497 	struct page **		pages;
498 	unsigned int		pathlen;
499 	struct iattr *		sattr;
500 };
501 
502 struct nfs_readdirargs {
503 	struct nfs_fh *		fh;
504 	__u32			cookie;
505 	unsigned int		count;
506 	struct page **		pages;
507 };
508 
509 struct nfs3_getaclargs {
510 	struct nfs_fh *		fh;
511 	int			mask;
512 	struct page **		pages;
513 };
514 
515 struct nfs3_setaclargs {
516 	struct inode *		inode;
517 	int			mask;
518 	struct posix_acl *	acl_access;
519 	struct posix_acl *	acl_default;
520 	size_t			len;
521 	unsigned int		npages;
522 	struct page **		pages;
523 };
524 
525 struct nfs_diropok {
526 	struct nfs_fh *		fh;
527 	struct nfs_fattr *	fattr;
528 };
529 
530 struct nfs_readlinkargs {
531 	struct nfs_fh *		fh;
532 	unsigned int		pgbase;
533 	unsigned int		pglen;
534 	struct page **		pages;
535 };
536 
537 struct nfs3_sattrargs {
538 	struct nfs_fh *		fh;
539 	struct iattr *		sattr;
540 	unsigned int		guard;
541 	struct timespec		guardtime;
542 };
543 
544 struct nfs3_diropargs {
545 	struct nfs_fh *		fh;
546 	const char *		name;
547 	unsigned int		len;
548 };
549 
550 struct nfs3_accessargs {
551 	struct nfs_fh *		fh;
552 	__u32			access;
553 };
554 
555 struct nfs3_createargs {
556 	struct nfs_fh *		fh;
557 	const char *		name;
558 	unsigned int		len;
559 	struct iattr *		sattr;
560 	enum nfs3_createmode	createmode;
561 	__be32			verifier[2];
562 };
563 
564 struct nfs3_mkdirargs {
565 	struct nfs_fh *		fh;
566 	const char *		name;
567 	unsigned int		len;
568 	struct iattr *		sattr;
569 };
570 
571 struct nfs3_symlinkargs {
572 	struct nfs_fh *		fromfh;
573 	const char *		fromname;
574 	unsigned int		fromlen;
575 	struct page **		pages;
576 	unsigned int		pathlen;
577 	struct iattr *		sattr;
578 };
579 
580 struct nfs3_mknodargs {
581 	struct nfs_fh *		fh;
582 	const char *		name;
583 	unsigned int		len;
584 	enum nfs3_ftype		type;
585 	struct iattr *		sattr;
586 	dev_t			rdev;
587 };
588 
589 struct nfs3_renameargs {
590 	struct nfs_fh *		fromfh;
591 	const char *		fromname;
592 	unsigned int		fromlen;
593 	struct nfs_fh *		tofh;
594 	const char *		toname;
595 	unsigned int		tolen;
596 };
597 
598 struct nfs3_linkargs {
599 	struct nfs_fh *		fromfh;
600 	struct nfs_fh *		tofh;
601 	const char *		toname;
602 	unsigned int		tolen;
603 };
604 
605 struct nfs3_readdirargs {
606 	struct nfs_fh *		fh;
607 	__u64			cookie;
608 	__be32			verf[2];
609 	int			plus;
610 	unsigned int            count;
611 	struct page **		pages;
612 };
613 
614 struct nfs3_diropres {
615 	struct nfs_fattr *	dir_attr;
616 	struct nfs_fh *		fh;
617 	struct nfs_fattr *	fattr;
618 };
619 
620 struct nfs3_accessres {
621 	struct nfs_fattr *	fattr;
622 	__u32			access;
623 };
624 
625 struct nfs3_readlinkargs {
626 	struct nfs_fh *		fh;
627 	unsigned int		pgbase;
628 	unsigned int		pglen;
629 	struct page **		pages;
630 };
631 
632 struct nfs3_renameres {
633 	struct nfs_fattr *	fromattr;
634 	struct nfs_fattr *	toattr;
635 };
636 
637 struct nfs3_linkres {
638 	struct nfs_fattr *	dir_attr;
639 	struct nfs_fattr *	fattr;
640 };
641 
642 struct nfs3_readdirres {
643 	struct nfs_fattr *	dir_attr;
644 	__be32 *		verf;
645 	int			plus;
646 };
647 
648 struct nfs3_getaclres {
649 	struct nfs_fattr *	fattr;
650 	int			mask;
651 	unsigned int		acl_access_count;
652 	unsigned int		acl_default_count;
653 	struct posix_acl *	acl_access;
654 	struct posix_acl *	acl_default;
655 };
656 
657 #ifdef CONFIG_NFS_V4
658 
659 typedef u64 clientid4;
660 
661 struct nfs4_accessargs {
662 	const struct nfs_fh *		fh;
663 	const u32 *			bitmask;
664 	u32				access;
665 	struct nfs4_sequence_args	seq_args;
666 };
667 
668 struct nfs4_accessres {
669 	const struct nfs_server *	server;
670 	struct nfs_fattr *		fattr;
671 	u32				supported;
672 	u32				access;
673 	struct nfs4_sequence_res	seq_res;
674 };
675 
676 struct nfs4_create_arg {
677 	u32				ftype;
678 	union {
679 		struct {
680 			struct page **	pages;
681 			unsigned int	len;
682 		} symlink;   /* NF4LNK */
683 		struct {
684 			u32		specdata1;
685 			u32		specdata2;
686 		} device;    /* NF4BLK, NF4CHR */
687 	} u;
688 	const struct qstr *		name;
689 	const struct nfs_server *	server;
690 	const struct iattr *		attrs;
691 	const struct nfs_fh *		dir_fh;
692 	const u32 *			bitmask;
693 	struct nfs4_sequence_args 	seq_args;
694 };
695 
696 struct nfs4_create_res {
697 	const struct nfs_server *	server;
698 	struct nfs_fh *			fh;
699 	struct nfs_fattr *		fattr;
700 	struct nfs4_change_info		dir_cinfo;
701 	struct nfs_fattr *		dir_fattr;
702 	struct nfs4_sequence_res	seq_res;
703 };
704 
705 struct nfs4_fsinfo_arg {
706 	const struct nfs_fh *		fh;
707 	const u32 *			bitmask;
708 	struct nfs4_sequence_args	seq_args;
709 };
710 
711 struct nfs4_fsinfo_res {
712 	struct nfs_fsinfo	       *fsinfo;
713 	struct nfs4_sequence_res	seq_res;
714 };
715 
716 struct nfs4_getattr_arg {
717 	const struct nfs_fh *		fh;
718 	const u32 *			bitmask;
719 	struct nfs4_sequence_args	seq_args;
720 };
721 
722 struct nfs4_getattr_res {
723 	const struct nfs_server *	server;
724 	struct nfs_fattr *		fattr;
725 	struct nfs4_sequence_res	seq_res;
726 };
727 
728 struct nfs4_link_arg {
729 	const struct nfs_fh *		fh;
730 	const struct nfs_fh *		dir_fh;
731 	const struct qstr *		name;
732 	const u32 *			bitmask;
733 	struct nfs4_sequence_args 	seq_args;
734 };
735 
736 struct nfs4_link_res {
737 	const struct nfs_server *	server;
738 	struct nfs_fattr *		fattr;
739 	struct nfs4_change_info		cinfo;
740 	struct nfs_fattr *		dir_attr;
741 	struct nfs4_sequence_res	seq_res;
742 };
743 
744 
745 struct nfs4_lookup_arg {
746 	const struct nfs_fh *		dir_fh;
747 	const struct qstr *		name;
748 	const u32 *			bitmask;
749 	struct nfs4_sequence_args	seq_args;
750 };
751 
752 struct nfs4_lookup_res {
753 	const struct nfs_server *	server;
754 	struct nfs_fattr *		fattr;
755 	struct nfs_fh *			fh;
756 	struct nfs4_sequence_res	seq_res;
757 };
758 
759 struct nfs4_lookup_root_arg {
760 	const u32 *			bitmask;
761 	struct nfs4_sequence_args	seq_args;
762 };
763 
764 struct nfs4_pathconf_arg {
765 	const struct nfs_fh *		fh;
766 	const u32 *			bitmask;
767 	struct nfs4_sequence_args	seq_args;
768 };
769 
770 struct nfs4_pathconf_res {
771 	struct nfs_pathconf	       *pathconf;
772 	struct nfs4_sequence_res	seq_res;
773 };
774 
775 struct nfs4_readdir_arg {
776 	const struct nfs_fh *		fh;
777 	u64				cookie;
778 	nfs4_verifier			verifier;
779 	u32				count;
780 	struct page **			pages;	/* zero-copy data */
781 	unsigned int			pgbase;	/* zero-copy data */
782 	const u32 *			bitmask;
783 	struct nfs4_sequence_args	seq_args;
784 };
785 
786 struct nfs4_readdir_res {
787 	nfs4_verifier			verifier;
788 	unsigned int			pgbase;
789 	struct nfs4_sequence_res	seq_res;
790 };
791 
792 struct nfs4_readlink {
793 	const struct nfs_fh *		fh;
794 	unsigned int			pgbase;
795 	unsigned int			pglen;   /* zero-copy data */
796 	struct page **			pages;   /* zero-copy data */
797 	struct nfs4_sequence_args	seq_args;
798 };
799 
800 struct nfs4_readlink_res {
801 	struct nfs4_sequence_res	seq_res;
802 };
803 
804 struct nfs4_rename_arg {
805 	const struct nfs_fh *		old_dir;
806 	const struct nfs_fh *		new_dir;
807 	const struct qstr *		old_name;
808 	const struct qstr *		new_name;
809 	const u32 *			bitmask;
810 	struct nfs4_sequence_args	seq_args;
811 };
812 
813 struct nfs4_rename_res {
814 	const struct nfs_server *	server;
815 	struct nfs4_change_info		old_cinfo;
816 	struct nfs_fattr *		old_fattr;
817 	struct nfs4_change_info		new_cinfo;
818 	struct nfs_fattr *		new_fattr;
819 	struct nfs4_sequence_res	seq_res;
820 };
821 
822 #define NFS4_SETCLIENTID_NAMELEN	(127)
823 struct nfs4_setclientid {
824 	const nfs4_verifier *		sc_verifier;
825 	unsigned int			sc_name_len;
826 	char				sc_name[NFS4_SETCLIENTID_NAMELEN + 1];
827 	u32				sc_prog;
828 	unsigned int			sc_netid_len;
829 	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
830 	unsigned int			sc_uaddr_len;
831 	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
832 	u32				sc_cb_ident;
833 };
834 
835 struct nfs4_setclientid_res {
836 	u64				clientid;
837 	nfs4_verifier			confirm;
838 };
839 
840 struct nfs4_statfs_arg {
841 	const struct nfs_fh *		fh;
842 	const u32 *			bitmask;
843 	struct nfs4_sequence_args	seq_args;
844 };
845 
846 struct nfs4_statfs_res {
847 	struct nfs_fsstat	       *fsstat;
848 	struct nfs4_sequence_res	seq_res;
849 };
850 
851 struct nfs4_server_caps_arg {
852 	struct nfs_fh		       *fhandle;
853 	struct nfs4_sequence_args	seq_args;
854 };
855 
856 struct nfs4_server_caps_res {
857 	u32				attr_bitmask[2];
858 	u32				acl_bitmask;
859 	u32				has_links;
860 	u32				has_symlinks;
861 	struct nfs4_sequence_res	seq_res;
862 };
863 
864 struct nfs4_string {
865 	unsigned int len;
866 	char *data;
867 };
868 
869 #define NFS4_PATHNAME_MAXCOMPONENTS 512
870 struct nfs4_pathname {
871 	unsigned int ncomponents;
872 	struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
873 };
874 
875 #define NFS4_FS_LOCATION_MAXSERVERS 10
876 struct nfs4_fs_location {
877 	unsigned int nservers;
878 	struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
879 	struct nfs4_pathname rootpath;
880 };
881 
882 #define NFS4_FS_LOCATIONS_MAXENTRIES 10
883 struct nfs4_fs_locations {
884 	struct nfs_fattr fattr;
885 	const struct nfs_server *server;
886 	struct nfs4_pathname fs_path;
887 	int nlocations;
888 	struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
889 };
890 
891 struct nfs4_fs_locations_arg {
892 	const struct nfs_fh *dir_fh;
893 	const struct qstr *name;
894 	struct page *page;
895 	const u32 *bitmask;
896 	struct nfs4_sequence_args	seq_args;
897 };
898 
899 struct nfs4_fs_locations_res {
900 	struct nfs4_fs_locations       *fs_locations;
901 	struct nfs4_sequence_res	seq_res;
902 };
903 
904 #endif /* CONFIG_NFS_V4 */
905 
906 struct nfstime4 {
907 	u64	seconds;
908 	u32	nseconds;
909 };
910 
911 #ifdef CONFIG_NFS_V4_1
912 struct nfs_impl_id4 {
913 	u32		domain_len;
914 	char		*domain;
915 	u32		name_len;
916 	char		*name;
917 	struct nfstime4	date;
918 };
919 
920 #define NFS4_EXCHANGE_ID_LEN	(48)
921 struct nfs41_exchange_id_args {
922 	struct nfs_client		*client;
923 	nfs4_verifier			*verifier;
924 	unsigned int 			id_len;
925 	char 				id[NFS4_EXCHANGE_ID_LEN];
926 	u32				flags;
927 };
928 
929 struct server_owner {
930 	uint64_t			minor_id;
931 	uint32_t			major_id_sz;
932 	char				major_id[NFS4_OPAQUE_LIMIT];
933 };
934 
935 struct server_scope {
936 	uint32_t			server_scope_sz;
937 	char 				server_scope[NFS4_OPAQUE_LIMIT];
938 };
939 
940 struct nfs41_exchange_id_res {
941 	struct nfs_client		*client;
942 	u32				flags;
943 };
944 
945 struct nfs41_create_session_args {
946 	struct nfs_client	       *client;
947 	uint32_t			flags;
948 	uint32_t			cb_program;
949 	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
950 	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
951 };
952 
953 struct nfs41_create_session_res {
954 	struct nfs_client	       *client;
955 };
956 
957 struct nfs41_reclaim_complete_args {
958 	/* In the future extend to include curr_fh for use with migration */
959 	unsigned char			one_fs:1;
960 	struct nfs4_sequence_args	seq_args;
961 };
962 
963 struct nfs41_reclaim_complete_res {
964 	struct nfs4_sequence_res	seq_res;
965 };
966 #endif /* CONFIG_NFS_V4_1 */
967 
968 struct nfs_page;
969 
970 #define NFS_PAGEVEC_SIZE	(8U)
971 
972 struct nfs_read_data {
973 	int			flags;
974 	struct rpc_task		task;
975 	struct inode		*inode;
976 	struct rpc_cred		*cred;
977 	struct nfs_fattr	fattr;	/* fattr storage */
978 	struct list_head	pages;	/* Coalesced read requests */
979 	struct nfs_page		*req;	/* multi ops per nfs_page */
980 	struct page		**pagevec;
981 	unsigned int		npages;	/* Max length of pagevec */
982 	struct nfs_readargs args;
983 	struct nfs_readres  res;
984 #ifdef CONFIG_NFS_V4
985 	unsigned long		timestamp;	/* For lease renewal */
986 #endif
987 	struct page		*page_array[NFS_PAGEVEC_SIZE];
988 };
989 
990 struct nfs_write_data {
991 	int			flags;
992 	struct rpc_task		task;
993 	struct inode		*inode;
994 	struct rpc_cred		*cred;
995 	struct nfs_fattr	fattr;
996 	struct nfs_writeverf	verf;
997 	struct list_head	pages;		/* Coalesced requests we wish to flush */
998 	struct nfs_page		*req;		/* multi ops per nfs_page */
999 	struct page		**pagevec;
1000 	unsigned int		npages;		/* Max length of pagevec */
1001 	struct nfs_writeargs	args;		/* argument struct */
1002 	struct nfs_writeres	res;		/* result struct */
1003 #ifdef CONFIG_NFS_V4
1004 	unsigned long		timestamp;	/* For lease renewal */
1005 #endif
1006 	struct page		*page_array[NFS_PAGEVEC_SIZE];
1007 };
1008 
1009 struct nfs_access_entry;
1010 
1011 /*
1012  * RPC procedure vector for NFSv2/NFSv3 demuxing
1013  */
1014 struct nfs_rpc_ops {
1015 	u32	version;		/* Protocol version */
1016 	const struct dentry_operations *dentry_ops;
1017 	const struct inode_operations *dir_inode_ops;
1018 	const struct inode_operations *file_inode_ops;
1019 
1020 	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
1021 			    struct nfs_fsinfo *);
1022 	int	(*lookupfh)(struct nfs_server *, struct nfs_fh *,
1023 			    struct qstr *, struct nfs_fh *,
1024 			    struct nfs_fattr *);
1025 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
1026 			    struct nfs_fattr *);
1027 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
1028 			    struct iattr *);
1029 	int	(*lookup)  (struct inode *, struct qstr *,
1030 			    struct nfs_fh *, struct nfs_fattr *);
1031 	int	(*access)  (struct inode *, struct nfs_access_entry *);
1032 	int	(*readlink)(struct inode *, struct page *, unsigned int,
1033 			    unsigned int);
1034 	int	(*create)  (struct inode *, struct dentry *,
1035 			    struct iattr *, int, struct nameidata *);
1036 	int	(*remove)  (struct inode *, struct qstr *);
1037 	void	(*unlink_setup)  (struct rpc_message *, struct inode *dir);
1038 	int	(*unlink_done) (struct rpc_task *, struct inode *);
1039 	int	(*rename)  (struct inode *, struct qstr *,
1040 			    struct inode *, struct qstr *);
1041 	int	(*link)    (struct inode *, struct inode *, struct qstr *);
1042 	int	(*symlink) (struct inode *, struct dentry *, struct page *,
1043 			    unsigned int, struct iattr *);
1044 	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
1045 	int	(*rmdir)   (struct inode *, struct qstr *);
1046 	int	(*readdir) (struct dentry *, struct rpc_cred *,
1047 			    u64, struct page *, unsigned int, int);
1048 	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
1049 			    dev_t);
1050 	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
1051 			    struct nfs_fsstat *);
1052 	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,
1053 			    struct nfs_fsinfo *);
1054 	int	(*pathconf) (struct nfs_server *, struct nfs_fh *,
1055 			     struct nfs_pathconf *);
1056 	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
1057 	__be32 *(*decode_dirent)(__be32 *, struct nfs_entry *, int plus);
1058 	void	(*read_setup)   (struct nfs_read_data *, struct rpc_message *);
1059 	int	(*read_done)  (struct rpc_task *, struct nfs_read_data *);
1060 	void	(*write_setup)  (struct nfs_write_data *, struct rpc_message *);
1061 	int	(*write_done)  (struct rpc_task *, struct nfs_write_data *);
1062 	void	(*commit_setup) (struct nfs_write_data *, struct rpc_message *);
1063 	int	(*commit_done) (struct rpc_task *, struct nfs_write_data *);
1064 	int	(*lock)(struct file *, int, struct file_lock *);
1065 	int	(*lock_check_bounds)(const struct file_lock *);
1066 	void	(*clear_acl_cache)(struct inode *);
1067 	void	(*close_context)(struct nfs_open_context *ctx, int);
1068 };
1069 
1070 /*
1071  * 	NFS_CALL(getattr, inode, (fattr));
1072  * into
1073  *	NFS_PROTO(inode)->getattr(fattr);
1074  */
1075 #define NFS_CALL(op, inode, args)	NFS_PROTO(inode)->op args
1076 
1077 /*
1078  * Function vectors etc. for the NFS client
1079  */
1080 extern const struct nfs_rpc_ops	nfs_v2_clientops;
1081 extern const struct nfs_rpc_ops	nfs_v3_clientops;
1082 extern const struct nfs_rpc_ops	nfs_v4_clientops;
1083 extern struct rpc_version	nfs_version2;
1084 extern struct rpc_version	nfs_version3;
1085 extern struct rpc_version	nfs_version4;
1086 
1087 extern struct rpc_version	nfsacl_version3;
1088 extern struct rpc_program	nfsacl_program;
1089 
1090 #endif
1091