xref: /linux-6.15/include/linux/nfs_xdr.h (revision b233b28e)
1 #ifndef _LINUX_NFS_XDR_H
2 #define _LINUX_NFS_XDR_H
3 
4 #include <linux/nfsacl.h>
5 
6 /*
7  * To change the maximum rsize and wsize supported by the NFS client, adjust
8  * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
9  * support a megabyte or more.  The default is left at 4096 bytes, which is
10  * reasonable for NFS over UDP.
11  */
12 #define NFS_MAX_FILE_IO_SIZE	(1048576U)
13 #define NFS_DEF_FILE_IO_SIZE	(4096U)
14 #define NFS_MIN_FILE_IO_SIZE	(1024U)
15 
16 struct nfs_fsid {
17 	uint64_t		major;
18 	uint64_t		minor;
19 };
20 
21 /*
22  * Helper for checking equality between 2 fsids.
23  */
24 static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
25 {
26 	return a->major == b->major && a->minor == b->minor;
27 }
28 
29 struct nfs_fattr {
30 	unsigned short		valid;		/* which fields are valid */
31 	__u64			pre_size;	/* pre_op_attr.size	  */
32 	struct timespec		pre_mtime;	/* pre_op_attr.mtime	  */
33 	struct timespec		pre_ctime;	/* pre_op_attr.ctime	  */
34 	enum nfs_ftype		type;		/* always use NFSv2 types */
35 	__u32			mode;
36 	__u32			nlink;
37 	__u32			uid;
38 	__u32			gid;
39 	dev_t			rdev;
40 	__u64			size;
41 	union {
42 		struct {
43 			__u32	blocksize;
44 			__u32	blocks;
45 		} nfs2;
46 		struct {
47 			__u64	used;
48 		} nfs3;
49 	} du;
50 	struct nfs_fsid		fsid;
51 	__u64			fileid;
52 	struct timespec		atime;
53 	struct timespec		mtime;
54 	struct timespec		ctime;
55 	__u32			bitmap[2];	/* NFSv4 returned attribute bitmap */
56 	__u64			change_attr;	/* NFSv4 change attribute */
57 	__u64			pre_change_attr;/* pre-op NFSv4 change attribute */
58 	unsigned long		time_start;
59 	unsigned long		gencount;
60 };
61 
62 #define NFS_ATTR_WCC		0x0001		/* pre-op WCC data    */
63 #define NFS_ATTR_FATTR		0x0002		/* post-op attributes */
64 #define NFS_ATTR_FATTR_V3	0x0004		/* NFSv3 attributes */
65 #define NFS_ATTR_FATTR_V4	0x0008		/* NFSv4 change attribute */
66 #define NFS_ATTR_WCC_V4		0x0010		/* pre-op change attribute */
67 #define NFS_ATTR_FATTR_V4_REFERRAL	0x0020		/* NFSv4 referral */
68 
69 /*
70  * Info on the file system
71  */
72 struct nfs_fsinfo {
73 	struct nfs_fattr	*fattr; /* Post-op attributes */
74 	__u32			rtmax;	/* max.  read transfer size */
75 	__u32			rtpref;	/* pref. read transfer size */
76 	__u32			rtmult;	/* reads should be multiple of this */
77 	__u32			wtmax;	/* max.  write transfer size */
78 	__u32			wtpref;	/* pref. write transfer size */
79 	__u32			wtmult;	/* writes should be multiple of this */
80 	__u32			dtpref;	/* pref. readdir transfer size */
81 	__u64			maxfilesize;
82 	__u32			lease_time; /* in seconds */
83 };
84 
85 struct nfs_fsstat {
86 	struct nfs_fattr	*fattr; /* Post-op attributes */
87 	__u64			tbytes;	/* total size in bytes */
88 	__u64			fbytes;	/* # of free bytes */
89 	__u64			abytes;	/* # of bytes available to user */
90 	__u64			tfiles;	/* # of files */
91 	__u64			ffiles;	/* # of free files */
92 	__u64			afiles;	/* # of files available to user */
93 };
94 
95 struct nfs2_fsstat {
96 	__u32			tsize;  /* Server transfer size */
97 	__u32			bsize;  /* Filesystem block size */
98 	__u32			blocks; /* No. of "bsize" blocks on filesystem */
99 	__u32			bfree;  /* No. of free "bsize" blocks */
100 	__u32			bavail; /* No. of available "bsize" blocks */
101 };
102 
103 struct nfs_pathconf {
104 	struct nfs_fattr	*fattr; /* Post-op attributes */
105 	__u32			max_link; /* max # of hard links */
106 	__u32			max_namelen; /* max name length */
107 };
108 
109 struct nfs4_change_info {
110 	u32			atomic;
111 	u64			before;
112 	u64			after;
113 };
114 
115 struct nfs_seqid;
116 /*
117  * Arguments to the open call.
118  */
119 struct nfs_openargs {
120 	const struct nfs_fh *	fh;
121 	struct nfs_seqid *	seqid;
122 	int			open_flags;
123 	fmode_t			fmode;
124 	__u64                   clientid;
125 	__u64                   id;
126 	union {
127 		struct iattr *  attrs;    /* UNCHECKED, GUARDED */
128 		nfs4_verifier   verifier; /* EXCLUSIVE */
129 		nfs4_stateid	delegation;		/* CLAIM_DELEGATE_CUR */
130 		fmode_t		delegation_type;	/* CLAIM_PREVIOUS */
131 	} u;
132 	const struct qstr *	name;
133 	const struct nfs_server *server;	 /* Needed for ID mapping */
134 	const u32 *		bitmask;
135 	__u32			claim;
136 };
137 
138 struct nfs_openres {
139 	nfs4_stateid            stateid;
140 	struct nfs_fh           fh;
141 	struct nfs4_change_info	cinfo;
142 	__u32                   rflags;
143 	struct nfs_fattr *      f_attr;
144 	struct nfs_fattr *      dir_attr;
145 	struct nfs_seqid *	seqid;
146 	const struct nfs_server *server;
147 	fmode_t			delegation_type;
148 	nfs4_stateid		delegation;
149 	__u32			do_recall;
150 	__u64			maxsize;
151 	__u32			attrset[NFS4_BITMAP_SIZE];
152 };
153 
154 /*
155  * Arguments to the open_confirm call.
156  */
157 struct nfs_open_confirmargs {
158 	const struct nfs_fh *	fh;
159 	nfs4_stateid *		stateid;
160 	struct nfs_seqid *	seqid;
161 };
162 
163 struct nfs_open_confirmres {
164 	nfs4_stateid            stateid;
165 	struct nfs_seqid *	seqid;
166 };
167 
168 /*
169  * Arguments to the close call.
170  */
171 struct nfs_closeargs {
172 	struct nfs_fh *         fh;
173 	nfs4_stateid *		stateid;
174 	struct nfs_seqid *	seqid;
175 	fmode_t			fmode;
176 	const u32 *		bitmask;
177 };
178 
179 struct nfs_closeres {
180 	nfs4_stateid            stateid;
181 	struct nfs_fattr *	fattr;
182 	struct nfs_seqid *	seqid;
183 	const struct nfs_server *server;
184 };
185 /*
186  *  * Arguments to the lock,lockt, and locku call.
187  *   */
188 struct nfs_lowner {
189 	__u64			clientid;
190 	__u64			id;
191 };
192 
193 struct nfs_lock_args {
194 	struct nfs_fh *		fh;
195 	struct file_lock *	fl;
196 	struct nfs_seqid *	lock_seqid;
197 	nfs4_stateid *		lock_stateid;
198 	struct nfs_seqid *	open_seqid;
199 	nfs4_stateid *		open_stateid;
200 	struct nfs_lowner	lock_owner;
201 	unsigned char		block : 1;
202 	unsigned char		reclaim : 1;
203 	unsigned char		new_lock_owner : 1;
204 };
205 
206 struct nfs_lock_res {
207 	nfs4_stateid		stateid;
208 	struct nfs_seqid *	lock_seqid;
209 	struct nfs_seqid *	open_seqid;
210 };
211 
212 struct nfs_locku_args {
213 	struct nfs_fh *		fh;
214 	struct file_lock *	fl;
215 	struct nfs_seqid *	seqid;
216 	nfs4_stateid *		stateid;
217 };
218 
219 struct nfs_locku_res {
220 	nfs4_stateid		stateid;
221 	struct nfs_seqid *	seqid;
222 };
223 
224 struct nfs_lockt_args {
225 	struct nfs_fh *		fh;
226 	struct file_lock *	fl;
227 	struct nfs_lowner	lock_owner;
228 };
229 
230 struct nfs_lockt_res {
231 	struct file_lock *	denied; /* LOCK, LOCKT failed */
232 };
233 
234 struct nfs4_delegreturnargs {
235 	const struct nfs_fh *fhandle;
236 	const nfs4_stateid *stateid;
237 	const u32 * bitmask;
238 };
239 
240 struct nfs4_delegreturnres {
241 	struct nfs_fattr * fattr;
242 	const struct nfs_server *server;
243 };
244 
245 /*
246  * Arguments to the read call.
247  */
248 struct nfs_readargs {
249 	struct nfs_fh *		fh;
250 	struct nfs_open_context *context;
251 	__u64			offset;
252 	__u32			count;
253 	unsigned int		pgbase;
254 	struct page **		pages;
255 };
256 
257 struct nfs_readres {
258 	struct nfs_fattr *	fattr;
259 	__u32			count;
260 	int                     eof;
261 };
262 
263 /*
264  * Arguments to the write call.
265  */
266 struct nfs_writeargs {
267 	struct nfs_fh *		fh;
268 	struct nfs_open_context *context;
269 	__u64			offset;
270 	__u32			count;
271 	enum nfs3_stable_how	stable;
272 	unsigned int		pgbase;
273 	struct page **		pages;
274 	const u32 *		bitmask;
275 };
276 
277 struct nfs_writeverf {
278 	enum nfs3_stable_how	committed;
279 	__be32			verifier[2];
280 };
281 
282 struct nfs_writeres {
283 	struct nfs_fattr *	fattr;
284 	struct nfs_writeverf *	verf;
285 	__u32			count;
286 	const struct nfs_server *server;
287 };
288 
289 /*
290  * Common arguments to the unlink call
291  */
292 struct nfs_removeargs {
293 	const struct nfs_fh	*fh;
294 	struct qstr		name;
295 	const u32 *		bitmask;
296 };
297 
298 struct nfs_removeres {
299 	const struct nfs_server *server;
300 	struct nfs4_change_info	cinfo;
301 	struct nfs_fattr	dir_attr;
302 };
303 
304 /*
305  * Argument struct for decode_entry function
306  */
307 struct nfs_entry {
308 	__u64			ino;
309 	__u64			cookie,
310 				prev_cookie;
311 	const char *		name;
312 	unsigned int		len;
313 	int			eof;
314 	struct nfs_fh *		fh;
315 	struct nfs_fattr *	fattr;
316 };
317 
318 /*
319  * The following types are for NFSv2 only.
320  */
321 struct nfs_sattrargs {
322 	struct nfs_fh *		fh;
323 	struct iattr *		sattr;
324 };
325 
326 struct nfs_diropargs {
327 	struct nfs_fh *		fh;
328 	const char *		name;
329 	unsigned int		len;
330 };
331 
332 struct nfs_createargs {
333 	struct nfs_fh *		fh;
334 	const char *		name;
335 	unsigned int		len;
336 	struct iattr *		sattr;
337 };
338 
339 struct nfs_renameargs {
340 	struct nfs_fh *		fromfh;
341 	const char *		fromname;
342 	unsigned int		fromlen;
343 	struct nfs_fh *		tofh;
344 	const char *		toname;
345 	unsigned int		tolen;
346 };
347 
348 struct nfs_setattrargs {
349 	struct nfs_fh *                 fh;
350 	nfs4_stateid                    stateid;
351 	struct iattr *                  iap;
352 	const struct nfs_server *	server; /* Needed for name mapping */
353 	const u32 *			bitmask;
354 };
355 
356 struct nfs_setaclargs {
357 	struct nfs_fh *			fh;
358 	size_t				acl_len;
359 	unsigned int			acl_pgbase;
360 	struct page **			acl_pages;
361 };
362 
363 struct nfs_getaclargs {
364 	struct nfs_fh *			fh;
365 	size_t				acl_len;
366 	unsigned int			acl_pgbase;
367 	struct page **			acl_pages;
368 };
369 
370 struct nfs_setattrres {
371 	struct nfs_fattr *              fattr;
372 	const struct nfs_server *	server;
373 };
374 
375 struct nfs_linkargs {
376 	struct nfs_fh *		fromfh;
377 	struct nfs_fh *		tofh;
378 	const char *		toname;
379 	unsigned int		tolen;
380 };
381 
382 struct nfs_symlinkargs {
383 	struct nfs_fh *		fromfh;
384 	const char *		fromname;
385 	unsigned int		fromlen;
386 	struct page **		pages;
387 	unsigned int		pathlen;
388 	struct iattr *		sattr;
389 };
390 
391 struct nfs_readdirargs {
392 	struct nfs_fh *		fh;
393 	__u32			cookie;
394 	unsigned int		count;
395 	struct page **		pages;
396 };
397 
398 struct nfs3_getaclargs {
399 	struct nfs_fh *		fh;
400 	int			mask;
401 	struct page **		pages;
402 };
403 
404 struct nfs3_setaclargs {
405 	struct inode *		inode;
406 	int			mask;
407 	struct posix_acl *	acl_access;
408 	struct posix_acl *	acl_default;
409 	struct page **		pages;
410 };
411 
412 struct nfs_diropok {
413 	struct nfs_fh *		fh;
414 	struct nfs_fattr *	fattr;
415 };
416 
417 struct nfs_readlinkargs {
418 	struct nfs_fh *		fh;
419 	unsigned int		pgbase;
420 	unsigned int		pglen;
421 	struct page **		pages;
422 };
423 
424 struct nfs3_sattrargs {
425 	struct nfs_fh *		fh;
426 	struct iattr *		sattr;
427 	unsigned int		guard;
428 	struct timespec		guardtime;
429 };
430 
431 struct nfs3_diropargs {
432 	struct nfs_fh *		fh;
433 	const char *		name;
434 	unsigned int		len;
435 };
436 
437 struct nfs3_accessargs {
438 	struct nfs_fh *		fh;
439 	__u32			access;
440 };
441 
442 struct nfs3_createargs {
443 	struct nfs_fh *		fh;
444 	const char *		name;
445 	unsigned int		len;
446 	struct iattr *		sattr;
447 	enum nfs3_createmode	createmode;
448 	__be32			verifier[2];
449 };
450 
451 struct nfs3_mkdirargs {
452 	struct nfs_fh *		fh;
453 	const char *		name;
454 	unsigned int		len;
455 	struct iattr *		sattr;
456 };
457 
458 struct nfs3_symlinkargs {
459 	struct nfs_fh *		fromfh;
460 	const char *		fromname;
461 	unsigned int		fromlen;
462 	struct page **		pages;
463 	unsigned int		pathlen;
464 	struct iattr *		sattr;
465 };
466 
467 struct nfs3_mknodargs {
468 	struct nfs_fh *		fh;
469 	const char *		name;
470 	unsigned int		len;
471 	enum nfs3_ftype		type;
472 	struct iattr *		sattr;
473 	dev_t			rdev;
474 };
475 
476 struct nfs3_renameargs {
477 	struct nfs_fh *		fromfh;
478 	const char *		fromname;
479 	unsigned int		fromlen;
480 	struct nfs_fh *		tofh;
481 	const char *		toname;
482 	unsigned int		tolen;
483 };
484 
485 struct nfs3_linkargs {
486 	struct nfs_fh *		fromfh;
487 	struct nfs_fh *		tofh;
488 	const char *		toname;
489 	unsigned int		tolen;
490 };
491 
492 struct nfs3_readdirargs {
493 	struct nfs_fh *		fh;
494 	__u64			cookie;
495 	__be32			verf[2];
496 	int			plus;
497 	unsigned int            count;
498 	struct page **		pages;
499 };
500 
501 struct nfs3_diropres {
502 	struct nfs_fattr *	dir_attr;
503 	struct nfs_fh *		fh;
504 	struct nfs_fattr *	fattr;
505 };
506 
507 struct nfs3_accessres {
508 	struct nfs_fattr *	fattr;
509 	__u32			access;
510 };
511 
512 struct nfs3_readlinkargs {
513 	struct nfs_fh *		fh;
514 	unsigned int		pgbase;
515 	unsigned int		pglen;
516 	struct page **		pages;
517 };
518 
519 struct nfs3_renameres {
520 	struct nfs_fattr *	fromattr;
521 	struct nfs_fattr *	toattr;
522 };
523 
524 struct nfs3_linkres {
525 	struct nfs_fattr *	dir_attr;
526 	struct nfs_fattr *	fattr;
527 };
528 
529 struct nfs3_readdirres {
530 	struct nfs_fattr *	dir_attr;
531 	__be32 *		verf;
532 	int			plus;
533 };
534 
535 struct nfs3_getaclres {
536 	struct nfs_fattr *	fattr;
537 	int			mask;
538 	unsigned int		acl_access_count;
539 	unsigned int		acl_default_count;
540 	struct posix_acl *	acl_access;
541 	struct posix_acl *	acl_default;
542 };
543 
544 #ifdef CONFIG_NFS_V4
545 
546 typedef u64 clientid4;
547 
548 struct nfs4_accessargs {
549 	const struct nfs_fh *		fh;
550 	const u32 *			bitmask;
551 	u32				access;
552 };
553 
554 struct nfs4_accessres {
555 	const struct nfs_server *	server;
556 	struct nfs_fattr *		fattr;
557 	u32				supported;
558 	u32				access;
559 };
560 
561 struct nfs4_create_arg {
562 	u32				ftype;
563 	union {
564 		struct {
565 			struct page **	pages;
566 			unsigned int	len;
567 		} symlink;   /* NF4LNK */
568 		struct {
569 			u32		specdata1;
570 			u32		specdata2;
571 		} device;    /* NF4BLK, NF4CHR */
572 	} u;
573 	const struct qstr *		name;
574 	const struct nfs_server *	server;
575 	const struct iattr *		attrs;
576 	const struct nfs_fh *		dir_fh;
577 	const u32 *			bitmask;
578 };
579 
580 struct nfs4_create_res {
581 	const struct nfs_server *	server;
582 	struct nfs_fh *			fh;
583 	struct nfs_fattr *		fattr;
584 	struct nfs4_change_info		dir_cinfo;
585 	struct nfs_fattr *		dir_fattr;
586 };
587 
588 struct nfs4_fsinfo_arg {
589 	const struct nfs_fh *		fh;
590 	const u32 *			bitmask;
591 };
592 
593 struct nfs4_getattr_arg {
594 	const struct nfs_fh *		fh;
595 	const u32 *			bitmask;
596 };
597 
598 struct nfs4_getattr_res {
599 	const struct nfs_server *	server;
600 	struct nfs_fattr *		fattr;
601 };
602 
603 struct nfs4_link_arg {
604 	const struct nfs_fh *		fh;
605 	const struct nfs_fh *		dir_fh;
606 	const struct qstr *		name;
607 	const u32 *			bitmask;
608 };
609 
610 struct nfs4_link_res {
611 	const struct nfs_server *	server;
612 	struct nfs_fattr *		fattr;
613 	struct nfs4_change_info		cinfo;
614 	struct nfs_fattr *		dir_attr;
615 };
616 
617 
618 struct nfs4_lookup_arg {
619 	const struct nfs_fh *		dir_fh;
620 	const struct qstr *		name;
621 	const u32 *			bitmask;
622 };
623 
624 struct nfs4_lookup_res {
625 	const struct nfs_server *	server;
626 	struct nfs_fattr *		fattr;
627 	struct nfs_fh *			fh;
628 };
629 
630 struct nfs4_lookup_root_arg {
631 	const u32 *			bitmask;
632 };
633 
634 struct nfs4_pathconf_arg {
635 	const struct nfs_fh *		fh;
636 	const u32 *			bitmask;
637 };
638 
639 struct nfs4_readdir_arg {
640 	const struct nfs_fh *		fh;
641 	u64				cookie;
642 	nfs4_verifier			verifier;
643 	u32				count;
644 	struct page **			pages;	/* zero-copy data */
645 	unsigned int			pgbase;	/* zero-copy data */
646 	const u32 *			bitmask;
647 };
648 
649 struct nfs4_readdir_res {
650 	nfs4_verifier			verifier;
651 	unsigned int			pgbase;
652 };
653 
654 struct nfs4_readlink {
655 	const struct nfs_fh *		fh;
656 	unsigned int			pgbase;
657 	unsigned int			pglen;   /* zero-copy data */
658 	struct page **			pages;   /* zero-copy data */
659 };
660 
661 struct nfs4_rename_arg {
662 	const struct nfs_fh *		old_dir;
663 	const struct nfs_fh *		new_dir;
664 	const struct qstr *		old_name;
665 	const struct qstr *		new_name;
666 	const u32 *			bitmask;
667 };
668 
669 struct nfs4_rename_res {
670 	const struct nfs_server *	server;
671 	struct nfs4_change_info		old_cinfo;
672 	struct nfs_fattr *		old_fattr;
673 	struct nfs4_change_info		new_cinfo;
674 	struct nfs_fattr *		new_fattr;
675 };
676 
677 #define NFS4_SETCLIENTID_NAMELEN	(127)
678 struct nfs4_setclientid {
679 	const nfs4_verifier *		sc_verifier;
680 	unsigned int			sc_name_len;
681 	char				sc_name[NFS4_SETCLIENTID_NAMELEN + 1];
682 	u32				sc_prog;
683 	unsigned int			sc_netid_len;
684 	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
685 	unsigned int			sc_uaddr_len;
686 	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
687 	u32				sc_cb_ident;
688 };
689 
690 struct nfs4_statfs_arg {
691 	const struct nfs_fh *		fh;
692 	const u32 *			bitmask;
693 };
694 
695 struct nfs4_server_caps_res {
696 	u32				attr_bitmask[2];
697 	u32				acl_bitmask;
698 	u32				has_links;
699 	u32				has_symlinks;
700 };
701 
702 struct nfs4_string {
703 	unsigned int len;
704 	char *data;
705 };
706 
707 #define NFS4_PATHNAME_MAXCOMPONENTS 512
708 struct nfs4_pathname {
709 	unsigned int ncomponents;
710 	struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
711 };
712 
713 #define NFS4_FS_LOCATION_MAXSERVERS 10
714 struct nfs4_fs_location {
715 	unsigned int nservers;
716 	struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
717 	struct nfs4_pathname rootpath;
718 };
719 
720 #define NFS4_FS_LOCATIONS_MAXENTRIES 10
721 struct nfs4_fs_locations {
722 	struct nfs_fattr fattr;
723 	const struct nfs_server *server;
724 	struct nfs4_pathname fs_path;
725 	int nlocations;
726 	struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
727 };
728 
729 struct nfs4_fs_locations_arg {
730 	const struct nfs_fh *dir_fh;
731 	const struct qstr *name;
732 	struct page *page;
733 	const u32 *bitmask;
734 };
735 
736 #endif /* CONFIG_NFS_V4 */
737 
738 struct nfs_page;
739 
740 #define NFS_PAGEVEC_SIZE	(8U)
741 
742 struct nfs_read_data {
743 	int			flags;
744 	struct rpc_task		task;
745 	struct inode		*inode;
746 	struct rpc_cred		*cred;
747 	struct nfs_fattr	fattr;	/* fattr storage */
748 	struct list_head	pages;	/* Coalesced read requests */
749 	struct nfs_page		*req;	/* multi ops per nfs_page */
750 	struct page		**pagevec;
751 	unsigned int		npages;	/* Max length of pagevec */
752 	struct nfs_readargs args;
753 	struct nfs_readres  res;
754 #ifdef CONFIG_NFS_V4
755 	unsigned long		timestamp;	/* For lease renewal */
756 #endif
757 	struct page		*page_array[NFS_PAGEVEC_SIZE];
758 };
759 
760 struct nfs_write_data {
761 	int			flags;
762 	struct rpc_task		task;
763 	struct inode		*inode;
764 	struct rpc_cred		*cred;
765 	struct nfs_fattr	fattr;
766 	struct nfs_writeverf	verf;
767 	struct list_head	pages;		/* Coalesced requests we wish to flush */
768 	struct nfs_page		*req;		/* multi ops per nfs_page */
769 	struct page		**pagevec;
770 	unsigned int		npages;		/* Max length of pagevec */
771 	struct nfs_writeargs	args;		/* argument struct */
772 	struct nfs_writeres	res;		/* result struct */
773 #ifdef CONFIG_NFS_V4
774 	unsigned long		timestamp;	/* For lease renewal */
775 #endif
776 	struct page		*page_array[NFS_PAGEVEC_SIZE];
777 };
778 
779 struct nfs_access_entry;
780 
781 /*
782  * RPC procedure vector for NFSv2/NFSv3 demuxing
783  */
784 struct nfs_rpc_ops {
785 	u32	version;		/* Protocol version */
786 	struct dentry_operations *dentry_ops;
787 	const struct inode_operations *dir_inode_ops;
788 	const struct inode_operations *file_inode_ops;
789 
790 	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
791 			    struct nfs_fsinfo *);
792 	int	(*lookupfh)(struct nfs_server *, struct nfs_fh *,
793 			    struct qstr *, struct nfs_fh *,
794 			    struct nfs_fattr *);
795 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
796 			    struct nfs_fattr *);
797 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
798 			    struct iattr *);
799 	int	(*lookup)  (struct inode *, struct qstr *,
800 			    struct nfs_fh *, struct nfs_fattr *);
801 	int	(*access)  (struct inode *, struct nfs_access_entry *);
802 	int	(*readlink)(struct inode *, struct page *, unsigned int,
803 			    unsigned int);
804 	int	(*create)  (struct inode *, struct dentry *,
805 			    struct iattr *, int, struct nameidata *);
806 	int	(*remove)  (struct inode *, struct qstr *);
807 	void	(*unlink_setup)  (struct rpc_message *, struct inode *dir);
808 	int	(*unlink_done) (struct rpc_task *, struct inode *);
809 	int	(*rename)  (struct inode *, struct qstr *,
810 			    struct inode *, struct qstr *);
811 	int	(*link)    (struct inode *, struct inode *, struct qstr *);
812 	int	(*symlink) (struct inode *, struct dentry *, struct page *,
813 			    unsigned int, struct iattr *);
814 	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
815 	int	(*rmdir)   (struct inode *, struct qstr *);
816 	int	(*readdir) (struct dentry *, struct rpc_cred *,
817 			    u64, struct page *, unsigned int, int);
818 	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
819 			    dev_t);
820 	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
821 			    struct nfs_fsstat *);
822 	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,
823 			    struct nfs_fsinfo *);
824 	int	(*pathconf) (struct nfs_server *, struct nfs_fh *,
825 			     struct nfs_pathconf *);
826 	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
827 	__be32 *(*decode_dirent)(__be32 *, struct nfs_entry *, int plus);
828 	void	(*read_setup)   (struct nfs_read_data *, struct rpc_message *);
829 	int	(*read_done)  (struct rpc_task *, struct nfs_read_data *);
830 	void	(*write_setup)  (struct nfs_write_data *, struct rpc_message *);
831 	int	(*write_done)  (struct rpc_task *, struct nfs_write_data *);
832 	void	(*commit_setup) (struct nfs_write_data *, struct rpc_message *);
833 	int	(*commit_done) (struct rpc_task *, struct nfs_write_data *);
834 	int	(*lock)(struct file *, int, struct file_lock *);
835 	int	(*lock_check_bounds)(const struct file_lock *);
836 	void	(*clear_acl_cache)(struct inode *);
837 };
838 
839 /*
840  * 	NFS_CALL(getattr, inode, (fattr));
841  * into
842  *	NFS_PROTO(inode)->getattr(fattr);
843  */
844 #define NFS_CALL(op, inode, args)	NFS_PROTO(inode)->op args
845 
846 /*
847  * Function vectors etc. for the NFS client
848  */
849 extern const struct nfs_rpc_ops	nfs_v2_clientops;
850 extern const struct nfs_rpc_ops	nfs_v3_clientops;
851 extern const struct nfs_rpc_ops	nfs_v4_clientops;
852 extern struct rpc_version	nfs_version2;
853 extern struct rpc_version	nfs_version3;
854 extern struct rpc_version	nfs_version4;
855 
856 extern struct rpc_version	nfsacl_version3;
857 extern struct rpc_program	nfsacl_program;
858 
859 #endif
860