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 		};
674 		struct {
675 			struct nfs_writeverf *	verf;		/* used by write */
676 			const struct nfs_server *server;	/* used by write */
677 		};
678 	};
679 };
680 
681 /*
682  * Arguments to the commit call.
683  */
684 struct nfs_commitargs {
685 	struct nfs4_sequence_args	seq_args;
686 	struct nfs_fh		*fh;
687 	__u64			offset;
688 	__u32			count;
689 	const u32		*bitmask;
690 };
691 
692 struct nfs_commitres {
693 	struct nfs4_sequence_res	seq_res;
694 	__u32			op_status;
695 	struct nfs_fattr	*fattr;
696 	struct nfs_writeverf	*verf;
697 	const struct nfs_server *server;
698 };
699 
700 /*
701  * Common arguments to the unlink call
702  */
703 struct nfs_removeargs {
704 	struct nfs4_sequence_args	seq_args;
705 	const struct nfs_fh	*fh;
706 	struct qstr		name;
707 };
708 
709 struct nfs_removeres {
710 	struct nfs4_sequence_res 	seq_res;
711 	struct nfs_server *server;
712 	struct nfs_fattr	*dir_attr;
713 	struct nfs4_change_info	cinfo;
714 };
715 
716 /*
717  * Common arguments to the rename call
718  */
719 struct nfs_renameargs {
720 	struct nfs4_sequence_args	seq_args;
721 	const struct nfs_fh		*old_dir;
722 	const struct nfs_fh		*new_dir;
723 	const struct qstr		*old_name;
724 	const struct qstr		*new_name;
725 };
726 
727 struct nfs_renameres {
728 	struct nfs4_sequence_res	seq_res;
729 	struct nfs_server		*server;
730 	struct nfs4_change_info		old_cinfo;
731 	struct nfs_fattr		*old_fattr;
732 	struct nfs4_change_info		new_cinfo;
733 	struct nfs_fattr		*new_fattr;
734 };
735 
736 /* parsed sec= options */
737 #define NFS_AUTH_INFO_MAX_FLAVORS 12 /* see fs/nfs/super.c */
738 struct nfs_auth_info {
739 	unsigned int            flavor_len;
740 	rpc_authflavor_t        flavors[NFS_AUTH_INFO_MAX_FLAVORS];
741 };
742 
743 /*
744  * Argument struct for decode_entry function
745  */
746 struct nfs_entry {
747 	__u64			ino;
748 	__u64			cookie;
749 	const char *		name;
750 	unsigned int		len;
751 	int			eof;
752 	struct nfs_fh *		fh;
753 	struct nfs_fattr *	fattr;
754 	unsigned char		d_type;
755 	struct nfs_server *	server;
756 };
757 
758 struct nfs_readdir_arg {
759 	struct dentry		*dentry;
760 	const struct cred	*cred;
761 	__be32			*verf;
762 	u64			cookie;
763 	struct page		**pages;
764 	unsigned int		page_len;
765 	bool			plus;
766 };
767 
768 struct nfs_readdir_res {
769 	__be32			*verf;
770 };
771 
772 /*
773  * The following types are for NFSv2 only.
774  */
775 struct nfs_sattrargs {
776 	struct nfs_fh *		fh;
777 	struct iattr *		sattr;
778 };
779 
780 struct nfs_diropargs {
781 	struct nfs_fh *		fh;
782 	const char *		name;
783 	unsigned int		len;
784 };
785 
786 struct nfs_createargs {
787 	struct nfs_fh *		fh;
788 	const char *		name;
789 	unsigned int		len;
790 	struct iattr *		sattr;
791 };
792 
793 struct nfs_setattrargs {
794 	struct nfs4_sequence_args 	seq_args;
795 	struct nfs_fh *                 fh;
796 	nfs4_stateid                    stateid;
797 	struct iattr *                  iap;
798 	const struct nfs_server *	server; /* Needed for name mapping */
799 	const u32 *			bitmask;
800 	const struct nfs4_label		*label;
801 };
802 
803 enum nfs4_acl_type {
804 	NFS4ACL_NONE = 0,
805 	NFS4ACL_ACL,
806 	NFS4ACL_DACL,
807 	NFS4ACL_SACL,
808 };
809 
810 struct nfs_setaclargs {
811 	struct nfs4_sequence_args	seq_args;
812 	struct nfs_fh *			fh;
813 	enum nfs4_acl_type		acl_type;
814 	size_t				acl_len;
815 	struct page **			acl_pages;
816 };
817 
818 struct nfs_setaclres {
819 	struct nfs4_sequence_res	seq_res;
820 };
821 
822 struct nfs_getaclargs {
823 	struct nfs4_sequence_args 	seq_args;
824 	struct nfs_fh *			fh;
825 	enum nfs4_acl_type		acl_type;
826 	size_t				acl_len;
827 	struct page **			acl_pages;
828 };
829 
830 /* getxattr ACL interface flags */
831 #define NFS4_ACL_TRUNC		0x0001	/* ACL was truncated */
832 struct nfs_getaclres {
833 	struct nfs4_sequence_res	seq_res;
834 	enum nfs4_acl_type		acl_type;
835 	size_t				acl_len;
836 	size_t				acl_data_offset;
837 	int				acl_flags;
838 	struct page *			acl_scratch;
839 };
840 
841 struct nfs_setattrres {
842 	struct nfs4_sequence_res	seq_res;
843 	struct nfs_fattr *              fattr;
844 	const struct nfs_server *	server;
845 };
846 
847 struct nfs_linkargs {
848 	struct nfs_fh *		fromfh;
849 	struct nfs_fh *		tofh;
850 	const char *		toname;
851 	unsigned int		tolen;
852 };
853 
854 struct nfs_symlinkargs {
855 	struct nfs_fh *		fromfh;
856 	const char *		fromname;
857 	unsigned int		fromlen;
858 	struct page **		pages;
859 	unsigned int		pathlen;
860 	struct iattr *		sattr;
861 };
862 
863 struct nfs_readdirargs {
864 	struct nfs_fh *		fh;
865 	__u32			cookie;
866 	unsigned int		count;
867 	struct page **		pages;
868 };
869 
870 struct nfs3_getaclargs {
871 	struct nfs_fh *		fh;
872 	int			mask;
873 	struct page **		pages;
874 };
875 
876 struct nfs3_setaclargs {
877 	struct inode *		inode;
878 	int			mask;
879 	struct posix_acl *	acl_access;
880 	struct posix_acl *	acl_default;
881 	size_t			len;
882 	unsigned int		npages;
883 	struct page **		pages;
884 };
885 
886 struct nfs_diropok {
887 	struct nfs_fh *		fh;
888 	struct nfs_fattr *	fattr;
889 };
890 
891 struct nfs_readlinkargs {
892 	struct nfs_fh *		fh;
893 	unsigned int		pgbase;
894 	unsigned int		pglen;
895 	struct page **		pages;
896 };
897 
898 struct nfs3_sattrargs {
899 	struct nfs_fh *		fh;
900 	struct iattr *		sattr;
901 	unsigned int		guard;
902 	struct timespec64	guardtime;
903 };
904 
905 struct nfs3_diropargs {
906 	struct nfs_fh *		fh;
907 	const char *		name;
908 	unsigned int		len;
909 };
910 
911 struct nfs3_accessargs {
912 	struct nfs_fh *		fh;
913 	__u32			access;
914 };
915 
916 struct nfs3_createargs {
917 	struct nfs_fh *		fh;
918 	const char *		name;
919 	unsigned int		len;
920 	struct iattr *		sattr;
921 	enum nfs3_createmode	createmode;
922 	__be32			verifier[2];
923 };
924 
925 struct nfs3_mkdirargs {
926 	struct nfs_fh *		fh;
927 	const char *		name;
928 	unsigned int		len;
929 	struct iattr *		sattr;
930 };
931 
932 struct nfs3_symlinkargs {
933 	struct nfs_fh *		fromfh;
934 	const char *		fromname;
935 	unsigned int		fromlen;
936 	struct page **		pages;
937 	unsigned int		pathlen;
938 	struct iattr *		sattr;
939 };
940 
941 struct nfs3_mknodargs {
942 	struct nfs_fh *		fh;
943 	const char *		name;
944 	unsigned int		len;
945 	enum nfs3_ftype		type;
946 	struct iattr *		sattr;
947 	dev_t			rdev;
948 };
949 
950 struct nfs3_linkargs {
951 	struct nfs_fh *		fromfh;
952 	struct nfs_fh *		tofh;
953 	const char *		toname;
954 	unsigned int		tolen;
955 };
956 
957 struct nfs3_readdirargs {
958 	struct nfs_fh *		fh;
959 	__u64			cookie;
960 	__be32			verf[2];
961 	bool			plus;
962 	unsigned int            count;
963 	struct page **		pages;
964 };
965 
966 struct nfs3_diropres {
967 	struct nfs_fattr *	dir_attr;
968 	struct nfs_fh *		fh;
969 	struct nfs_fattr *	fattr;
970 };
971 
972 struct nfs3_accessres {
973 	struct nfs_fattr *	fattr;
974 	__u32			access;
975 };
976 
977 struct nfs3_readlinkargs {
978 	struct nfs_fh *		fh;
979 	unsigned int		pgbase;
980 	unsigned int		pglen;
981 	struct page **		pages;
982 };
983 
984 struct nfs3_linkres {
985 	struct nfs_fattr *	dir_attr;
986 	struct nfs_fattr *	fattr;
987 };
988 
989 struct nfs3_readdirres {
990 	struct nfs_fattr *	dir_attr;
991 	__be32 *		verf;
992 	bool			plus;
993 };
994 
995 struct nfs3_getaclres {
996 	struct nfs_fattr *	fattr;
997 	int			mask;
998 	unsigned int		acl_access_count;
999 	unsigned int		acl_default_count;
1000 	struct posix_acl *	acl_access;
1001 	struct posix_acl *	acl_default;
1002 };
1003 
1004 #if IS_ENABLED(CONFIG_NFS_V4)
1005 
1006 typedef u64 clientid4;
1007 
1008 struct nfs4_accessargs {
1009 	struct nfs4_sequence_args	seq_args;
1010 	const struct nfs_fh *		fh;
1011 	const u32 *			bitmask;
1012 	u32				access;
1013 };
1014 
1015 struct nfs4_accessres {
1016 	struct nfs4_sequence_res	seq_res;
1017 	const struct nfs_server *	server;
1018 	struct nfs_fattr *		fattr;
1019 	u32				supported;
1020 	u32				access;
1021 };
1022 
1023 struct nfs4_create_arg {
1024 	struct nfs4_sequence_args 	seq_args;
1025 	u32				ftype;
1026 	union {
1027 		struct {
1028 			struct page **	pages;
1029 			unsigned int	len;
1030 		} symlink;   /* NF4LNK */
1031 		struct {
1032 			u32		specdata1;
1033 			u32		specdata2;
1034 		} device;    /* NF4BLK, NF4CHR */
1035 	} u;
1036 	const struct qstr *		name;
1037 	const struct nfs_server *	server;
1038 	const struct iattr *		attrs;
1039 	const struct nfs_fh *		dir_fh;
1040 	const u32 *			bitmask;
1041 	const struct nfs4_label		*label;
1042 	umode_t				umask;
1043 };
1044 
1045 struct nfs4_create_res {
1046 	struct nfs4_sequence_res	seq_res;
1047 	const struct nfs_server *	server;
1048 	struct nfs_fh *			fh;
1049 	struct nfs_fattr *		fattr;
1050 	struct nfs4_change_info		dir_cinfo;
1051 };
1052 
1053 struct nfs4_fsinfo_arg {
1054 	struct nfs4_sequence_args	seq_args;
1055 	const struct nfs_fh *		fh;
1056 	const u32 *			bitmask;
1057 };
1058 
1059 struct nfs4_fsinfo_res {
1060 	struct nfs4_sequence_res	seq_res;
1061 	struct nfs_fsinfo	       *fsinfo;
1062 };
1063 
1064 struct nfs4_getattr_arg {
1065 	struct nfs4_sequence_args	seq_args;
1066 	const struct nfs_fh *		fh;
1067 	const u32 *			bitmask;
1068 };
1069 
1070 struct nfs4_getattr_res {
1071 	struct nfs4_sequence_res	seq_res;
1072 	const struct nfs_server *	server;
1073 	struct nfs_fattr *		fattr;
1074 };
1075 
1076 struct nfs4_link_arg {
1077 	struct nfs4_sequence_args 	seq_args;
1078 	const struct nfs_fh *		fh;
1079 	const struct nfs_fh *		dir_fh;
1080 	const struct qstr *		name;
1081 	const u32 *			bitmask;
1082 };
1083 
1084 struct nfs4_link_res {
1085 	struct nfs4_sequence_res	seq_res;
1086 	const struct nfs_server *	server;
1087 	struct nfs_fattr *		fattr;
1088 	struct nfs4_change_info		cinfo;
1089 	struct nfs_fattr *		dir_attr;
1090 };
1091 
1092 struct nfs4_lookup_arg {
1093 	struct nfs4_sequence_args	seq_args;
1094 	const struct nfs_fh *		dir_fh;
1095 	const struct qstr *		name;
1096 	const u32 *			bitmask;
1097 };
1098 
1099 struct nfs4_lookup_res {
1100 	struct nfs4_sequence_res	seq_res;
1101 	const struct nfs_server *	server;
1102 	struct nfs_fattr *		fattr;
1103 	struct nfs_fh *			fh;
1104 };
1105 
1106 struct nfs4_lookupp_arg {
1107 	struct nfs4_sequence_args	seq_args;
1108 	const struct nfs_fh		*fh;
1109 	const u32			*bitmask;
1110 };
1111 
1112 struct nfs4_lookupp_res {
1113 	struct nfs4_sequence_res	seq_res;
1114 	const struct nfs_server		*server;
1115 	struct nfs_fattr		*fattr;
1116 	struct nfs_fh			*fh;
1117 };
1118 
1119 struct nfs4_lookup_root_arg {
1120 	struct nfs4_sequence_args	seq_args;
1121 	const u32 *			bitmask;
1122 };
1123 
1124 struct nfs4_pathconf_arg {
1125 	struct nfs4_sequence_args	seq_args;
1126 	const struct nfs_fh *		fh;
1127 	const u32 *			bitmask;
1128 };
1129 
1130 struct nfs4_pathconf_res {
1131 	struct nfs4_sequence_res	seq_res;
1132 	struct nfs_pathconf	       *pathconf;
1133 };
1134 
1135 struct nfs4_readdir_arg {
1136 	struct nfs4_sequence_args	seq_args;
1137 	const struct nfs_fh *		fh;
1138 	u64				cookie;
1139 	nfs4_verifier			verifier;
1140 	u32				count;
1141 	struct page **			pages;	/* zero-copy data */
1142 	unsigned int			pgbase;	/* zero-copy data */
1143 	const u32 *			bitmask;
1144 	bool				plus;
1145 };
1146 
1147 struct nfs4_readdir_res {
1148 	struct nfs4_sequence_res	seq_res;
1149 	nfs4_verifier			verifier;
1150 	unsigned int			pgbase;
1151 };
1152 
1153 struct nfs4_readlink {
1154 	struct nfs4_sequence_args	seq_args;
1155 	const struct nfs_fh *		fh;
1156 	unsigned int			pgbase;
1157 	unsigned int			pglen;   /* zero-copy data */
1158 	struct page **			pages;   /* zero-copy data */
1159 };
1160 
1161 struct nfs4_readlink_res {
1162 	struct nfs4_sequence_res	seq_res;
1163 };
1164 
1165 struct nfs4_setclientid {
1166 	const nfs4_verifier *		sc_verifier;
1167 	u32				sc_prog;
1168 	unsigned int			sc_netid_len;
1169 	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
1170 	unsigned int			sc_uaddr_len;
1171 	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
1172 	struct nfs_client		*sc_clnt;
1173 	struct rpc_cred			*sc_cred;
1174 };
1175 
1176 struct nfs4_setclientid_res {
1177 	u64				clientid;
1178 	nfs4_verifier			confirm;
1179 };
1180 
1181 struct nfs4_statfs_arg {
1182 	struct nfs4_sequence_args	seq_args;
1183 	const struct nfs_fh *		fh;
1184 	const u32 *			bitmask;
1185 };
1186 
1187 struct nfs4_statfs_res {
1188 	struct nfs4_sequence_res	seq_res;
1189 	struct nfs_fsstat	       *fsstat;
1190 };
1191 
1192 struct nfs4_server_caps_arg {
1193 	struct nfs4_sequence_args	seq_args;
1194 	struct nfs_fh		       *fhandle;
1195 	const u32 *			bitmask;
1196 };
1197 
1198 struct nfs4_server_caps_res {
1199 	struct nfs4_sequence_res	seq_res;
1200 	u32				attr_bitmask[3];
1201 	u32				exclcreat_bitmask[3];
1202 	u32				acl_bitmask;
1203 	u32				has_links;
1204 	u32				has_symlinks;
1205 	u32				fh_expire_type;
1206 	u32				case_insensitive;
1207 	u32				case_preserving;
1208 };
1209 
1210 #define NFS4_PATHNAME_MAXCOMPONENTS 512
1211 struct nfs4_pathname {
1212 	unsigned int ncomponents;
1213 	struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
1214 };
1215 
1216 #define NFS4_FS_LOCATION_MAXSERVERS 10
1217 struct nfs4_fs_location {
1218 	unsigned int nservers;
1219 	struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
1220 	struct nfs4_pathname rootpath;
1221 };
1222 
1223 #define NFS4_FS_LOCATIONS_MAXENTRIES 10
1224 struct nfs4_fs_locations {
1225 	struct nfs_fattr *fattr;
1226 	const struct nfs_server *server;
1227 	struct nfs4_pathname fs_path;
1228 	int nlocations;
1229 	struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
1230 };
1231 
1232 struct nfs4_fs_locations_arg {
1233 	struct nfs4_sequence_args	seq_args;
1234 	const struct nfs_fh *dir_fh;
1235 	const struct nfs_fh *fh;
1236 	const struct qstr *name;
1237 	struct page *page;
1238 	const u32 *bitmask;
1239 	clientid4 clientid;
1240 	unsigned char migration:1, renew:1;
1241 };
1242 
1243 struct nfs4_fs_locations_res {
1244 	struct nfs4_sequence_res	seq_res;
1245 	struct nfs4_fs_locations       *fs_locations;
1246 	unsigned char			migration:1, renew:1;
1247 };
1248 
1249 struct nfs4_secinfo4 {
1250 	u32			flavor;
1251 	struct rpcsec_gss_info	flavor_info;
1252 };
1253 
1254 struct nfs4_secinfo_flavors {
1255 	unsigned int		num_flavors;
1256 	struct nfs4_secinfo4	flavors[];
1257 };
1258 
1259 struct nfs4_secinfo_arg {
1260 	struct nfs4_sequence_args	seq_args;
1261 	const struct nfs_fh		*dir_fh;
1262 	const struct qstr		*name;
1263 };
1264 
1265 struct nfs4_secinfo_res {
1266 	struct nfs4_sequence_res	seq_res;
1267 	struct nfs4_secinfo_flavors	*flavors;
1268 };
1269 
1270 struct nfs4_fsid_present_arg {
1271 	struct nfs4_sequence_args	seq_args;
1272 	const struct nfs_fh		*fh;
1273 	clientid4			clientid;
1274 	unsigned char			renew:1;
1275 };
1276 
1277 struct nfs4_fsid_present_res {
1278 	struct nfs4_sequence_res	seq_res;
1279 	struct nfs_fh			*fh;
1280 	unsigned char			renew:1;
1281 };
1282 
1283 #endif /* CONFIG_NFS_V4 */
1284 
1285 struct nfstime4 {
1286 	u64	seconds;
1287 	u32	nseconds;
1288 };
1289 
1290 #ifdef CONFIG_NFS_V4_1
1291 
1292 struct pnfs_commit_bucket {
1293 	struct list_head written;
1294 	struct list_head committing;
1295 	struct pnfs_layout_segment *lseg;
1296 	struct nfs_writeverf direct_verf;
1297 };
1298 
1299 struct pnfs_commit_array {
1300 	struct list_head cinfo_list;
1301 	struct list_head lseg_list;
1302 	struct pnfs_layout_segment *lseg;
1303 	struct rcu_head rcu;
1304 	refcount_t refcount;
1305 	unsigned int nbuckets;
1306 	struct pnfs_commit_bucket buckets[];
1307 };
1308 
1309 struct pnfs_ds_commit_info {
1310 	struct list_head commits;
1311 	unsigned int nwritten;
1312 	unsigned int ncommitting;
1313 	const struct pnfs_commit_ops *ops;
1314 };
1315 
1316 struct nfs41_state_protection {
1317 	u32 how;
1318 	struct nfs4_op_map enforce;
1319 	struct nfs4_op_map allow;
1320 };
1321 
1322 struct nfs41_exchange_id_args {
1323 	struct nfs_client		*client;
1324 	nfs4_verifier			verifier;
1325 	u32				flags;
1326 	struct nfs41_state_protection	state_protect;
1327 };
1328 
1329 struct nfs41_server_owner {
1330 	uint64_t			minor_id;
1331 	uint32_t			major_id_sz;
1332 	char				major_id[NFS4_OPAQUE_LIMIT];
1333 };
1334 
1335 struct nfs41_server_scope {
1336 	uint32_t			server_scope_sz;
1337 	char 				server_scope[NFS4_OPAQUE_LIMIT];
1338 };
1339 
1340 struct nfs41_impl_id {
1341 	char				domain[NFS4_OPAQUE_LIMIT + 1];
1342 	char				name[NFS4_OPAQUE_LIMIT + 1];
1343 	struct nfstime4			date;
1344 };
1345 
1346 #define MAX_BIND_CONN_TO_SESSION_RETRIES 3
1347 struct nfs41_bind_conn_to_session_args {
1348 	struct nfs_client		*client;
1349 	struct nfs4_sessionid		sessionid;
1350 	u32				dir;
1351 	bool				use_conn_in_rdma_mode;
1352 	int				retries;
1353 };
1354 
1355 struct nfs41_bind_conn_to_session_res {
1356 	struct nfs4_sessionid		sessionid;
1357 	u32				dir;
1358 	bool				use_conn_in_rdma_mode;
1359 };
1360 
1361 struct nfs41_exchange_id_res {
1362 	u64				clientid;
1363 	u32				seqid;
1364 	u32				flags;
1365 	struct nfs41_server_owner	*server_owner;
1366 	struct nfs41_server_scope	*server_scope;
1367 	struct nfs41_impl_id		*impl_id;
1368 	struct nfs41_state_protection	state_protect;
1369 };
1370 
1371 struct nfs41_create_session_args {
1372 	struct nfs_client	       *client;
1373 	u64				clientid;
1374 	uint32_t			seqid;
1375 	uint32_t			flags;
1376 	uint32_t			cb_program;
1377 	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
1378 	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
1379 };
1380 
1381 struct nfs41_create_session_res {
1382 	struct nfs4_sessionid		sessionid;
1383 	uint32_t			seqid;
1384 	uint32_t			flags;
1385 	struct nfs4_channel_attrs	fc_attrs;	/* Fore Channel */
1386 	struct nfs4_channel_attrs	bc_attrs;	/* Back Channel */
1387 };
1388 
1389 struct nfs41_reclaim_complete_args {
1390 	struct nfs4_sequence_args	seq_args;
1391 	/* In the future extend to include curr_fh for use with migration */
1392 	unsigned char			one_fs:1;
1393 };
1394 
1395 struct nfs41_reclaim_complete_res {
1396 	struct nfs4_sequence_res	seq_res;
1397 };
1398 
1399 #define SECINFO_STYLE_CURRENT_FH 0
1400 #define SECINFO_STYLE_PARENT 1
1401 struct nfs41_secinfo_no_name_args {
1402 	struct nfs4_sequence_args	seq_args;
1403 	int				style;
1404 };
1405 
1406 struct nfs41_test_stateid_args {
1407 	struct nfs4_sequence_args	seq_args;
1408 	nfs4_stateid			*stateid;
1409 };
1410 
1411 struct nfs41_test_stateid_res {
1412 	struct nfs4_sequence_res	seq_res;
1413 	unsigned int			status;
1414 };
1415 
1416 struct nfs41_free_stateid_args {
1417 	struct nfs4_sequence_args	seq_args;
1418 	nfs4_stateid			stateid;
1419 };
1420 
1421 struct nfs41_free_stateid_res {
1422 	struct nfs4_sequence_res	seq_res;
1423 	unsigned int			status;
1424 };
1425 
1426 #else
1427 
1428 struct pnfs_ds_commit_info {
1429 };
1430 
1431 #endif /* CONFIG_NFS_V4_1 */
1432 
1433 #ifdef CONFIG_NFS_V4_2
1434 struct nfs42_falloc_args {
1435 	struct nfs4_sequence_args	seq_args;
1436 
1437 	struct nfs_fh			*falloc_fh;
1438 	nfs4_stateid			 falloc_stateid;
1439 	u64				 falloc_offset;
1440 	u64				 falloc_length;
1441 	const u32			*falloc_bitmask;
1442 };
1443 
1444 struct nfs42_falloc_res {
1445 	struct nfs4_sequence_res	seq_res;
1446 	unsigned int			status;
1447 
1448 	struct nfs_fattr		*falloc_fattr;
1449 	const struct nfs_server		*falloc_server;
1450 };
1451 
1452 struct nfs42_copy_args {
1453 	struct nfs4_sequence_args	seq_args;
1454 
1455 	struct nfs_fh			*src_fh;
1456 	nfs4_stateid			src_stateid;
1457 	u64				src_pos;
1458 
1459 	struct nfs_fh			*dst_fh;
1460 	nfs4_stateid			dst_stateid;
1461 	u64				dst_pos;
1462 
1463 	u64				count;
1464 	bool				sync;
1465 	struct nl4_server		*cp_src;
1466 };
1467 
1468 struct nfs42_write_res {
1469 	nfs4_stateid		stateid;
1470 	u64			count;
1471 	struct nfs_writeverf	verifier;
1472 };
1473 
1474 struct nfs42_copy_res {
1475 	struct nfs4_sequence_res	seq_res;
1476 	struct nfs42_write_res		write_res;
1477 	bool				consecutive;
1478 	bool				synchronous;
1479 	struct nfs_commitres		commit_res;
1480 };
1481 
1482 struct nfs42_offload_status_args {
1483 	struct nfs4_sequence_args	osa_seq_args;
1484 	struct nfs_fh			*osa_src_fh;
1485 	nfs4_stateid			osa_stateid;
1486 };
1487 
1488 struct nfs42_offload_status_res {
1489 	struct nfs4_sequence_res	osr_seq_res;
1490 	uint64_t			osr_count;
1491 	int				osr_status;
1492 };
1493 
1494 struct nfs42_copy_notify_args {
1495 	struct nfs4_sequence_args	cna_seq_args;
1496 
1497 	struct nfs_fh		*cna_src_fh;
1498 	nfs4_stateid		cna_src_stateid;
1499 	struct nl4_server	cna_dst;
1500 };
1501 
1502 struct nfs42_copy_notify_res {
1503 	struct nfs4_sequence_res	cnr_seq_res;
1504 
1505 	struct nfstime4		cnr_lease_time;
1506 	nfs4_stateid		cnr_stateid;
1507 	struct nl4_server	cnr_src;
1508 };
1509 
1510 struct nfs42_seek_args {
1511 	struct nfs4_sequence_args	seq_args;
1512 
1513 	struct nfs_fh			*sa_fh;
1514 	nfs4_stateid			sa_stateid;
1515 	u64				sa_offset;
1516 	u32				sa_what;
1517 };
1518 
1519 struct nfs42_seek_res {
1520 	struct nfs4_sequence_res	seq_res;
1521 	unsigned int			status;
1522 
1523 	u32	sr_eof;
1524 	u64	sr_offset;
1525 };
1526 
1527 struct nfs42_setxattrargs {
1528 	struct nfs4_sequence_args	seq_args;
1529 	struct nfs_fh			*fh;
1530 	const char			*xattr_name;
1531 	u32				xattr_flags;
1532 	size_t				xattr_len;
1533 	struct page			**xattr_pages;
1534 };
1535 
1536 struct nfs42_setxattrres {
1537 	struct nfs4_sequence_res	seq_res;
1538 	struct nfs4_change_info		cinfo;
1539 };
1540 
1541 struct nfs42_getxattrargs {
1542 	struct nfs4_sequence_args	seq_args;
1543 	struct nfs_fh			*fh;
1544 	const char			*xattr_name;
1545 	size_t				xattr_len;
1546 	struct page			**xattr_pages;
1547 };
1548 
1549 struct nfs42_getxattrres {
1550 	struct nfs4_sequence_res	seq_res;
1551 	size_t				xattr_len;
1552 };
1553 
1554 struct nfs42_listxattrsargs {
1555 	struct nfs4_sequence_args	seq_args;
1556 	struct nfs_fh			*fh;
1557 	u32				count;
1558 	u64				cookie;
1559 	struct page			**xattr_pages;
1560 };
1561 
1562 struct nfs42_listxattrsres {
1563 	struct nfs4_sequence_res	seq_res;
1564 	struct page			*scratch;
1565 	void				*xattr_buf;
1566 	size_t				xattr_len;
1567 	u64				cookie;
1568 	bool				eof;
1569 	size_t				copied;
1570 };
1571 
1572 struct nfs42_removexattrargs {
1573 	struct nfs4_sequence_args	seq_args;
1574 	struct nfs_fh			*fh;
1575 	const char			*xattr_name;
1576 };
1577 
1578 struct nfs42_removexattrres {
1579 	struct nfs4_sequence_res	seq_res;
1580 	struct nfs4_change_info		cinfo;
1581 };
1582 
1583 #endif /* CONFIG_NFS_V4_2 */
1584 
1585 struct nfs_page;
1586 
1587 #define NFS_PAGEVEC_SIZE	(8U)
1588 
1589 struct nfs_page_array {
1590 	struct page		**pagevec;
1591 	unsigned int		npages;		/* Max length of pagevec */
1592 	struct page		*page_array[NFS_PAGEVEC_SIZE];
1593 };
1594 
1595 /* used as flag bits in nfs_pgio_header */
1596 enum {
1597 	NFS_IOHDR_ERROR = 0,
1598 	NFS_IOHDR_EOF,
1599 	NFS_IOHDR_REDO,
1600 	NFS_IOHDR_STAT,
1601 	NFS_IOHDR_RESEND_PNFS,
1602 	NFS_IOHDR_RESEND_MDS,
1603 };
1604 
1605 struct nfs_io_completion;
1606 struct nfs_pgio_header {
1607 	struct inode		*inode;
1608 	const struct cred		*cred;
1609 	struct list_head	pages;
1610 	struct nfs_page		*req;
1611 	struct nfs_writeverf	verf;		/* Used for writes */
1612 	fmode_t			rw_mode;
1613 	struct pnfs_layout_segment *lseg;
1614 	loff_t			io_start;
1615 	const struct rpc_call_ops *mds_ops;
1616 	void (*release) (struct nfs_pgio_header *hdr);
1617 	const struct nfs_pgio_completion_ops *completion_ops;
1618 	const struct nfs_rw_ops	*rw_ops;
1619 	struct nfs_io_completion *io_completion;
1620 	struct nfs_direct_req	*dreq;
1621 
1622 	int			pnfs_error;
1623 	int			error;		/* merge with pnfs_error */
1624 	unsigned int		good_bytes;	/* boundary of good data */
1625 	unsigned long		flags;
1626 
1627 	/*
1628 	 * rpc data
1629 	 */
1630 	struct rpc_task		task;
1631 	struct nfs_fattr	fattr;
1632 	struct nfs_pgio_args	args;		/* argument struct */
1633 	struct nfs_pgio_res	res;		/* result struct */
1634 	unsigned long		timestamp;	/* For lease renewal */
1635 	int (*pgio_done_cb)(struct rpc_task *, struct nfs_pgio_header *);
1636 	__u64			mds_offset;	/* Filelayout dense stripe */
1637 	struct nfs_page_array	page_array;
1638 	struct nfs_client	*ds_clp;	/* pNFS data server */
1639 	u32			ds_commit_idx;	/* ds index if ds_clp is set */
1640 	u32			pgio_mirror_idx;/* mirror index in pgio layer */
1641 };
1642 
1643 struct nfs_mds_commit_info {
1644 	atomic_t rpcs_out;
1645 	atomic_long_t		ncommit;
1646 	struct list_head	list;
1647 };
1648 
1649 struct nfs_commit_info;
1650 struct nfs_commit_data;
1651 struct nfs_inode;
1652 struct nfs_commit_completion_ops {
1653 	void (*completion) (struct nfs_commit_data *data);
1654 	void (*resched_write) (struct nfs_commit_info *, struct nfs_page *);
1655 };
1656 
1657 struct nfs_commit_info {
1658 	struct inode 			*inode;	/* Needed for inode->i_lock */
1659 	struct nfs_mds_commit_info	*mds;
1660 	struct pnfs_ds_commit_info	*ds;
1661 	struct nfs_direct_req		*dreq;	/* O_DIRECT request */
1662 	const struct nfs_commit_completion_ops *completion_ops;
1663 };
1664 
1665 struct nfs_commit_data {
1666 	struct rpc_task		task;
1667 	struct inode		*inode;
1668 	const struct cred		*cred;
1669 	struct nfs_fattr	fattr;
1670 	struct nfs_writeverf	verf;
1671 	struct list_head	pages;		/* Coalesced requests we wish to flush */
1672 	struct list_head	list;		/* lists of struct nfs_write_data */
1673 	struct nfs_direct_req	*dreq;		/* O_DIRECT request */
1674 	struct nfs_commitargs	args;		/* argument struct */
1675 	struct nfs_commitres	res;		/* result struct */
1676 	struct nfs_open_context *context;
1677 	struct pnfs_layout_segment *lseg;
1678 	struct nfs_client	*ds_clp;	/* pNFS data server */
1679 	int			ds_commit_index;
1680 	loff_t			lwb;
1681 	const struct rpc_call_ops *mds_ops;
1682 	const struct nfs_commit_completion_ops *completion_ops;
1683 	int (*commit_done_cb) (struct rpc_task *task, struct nfs_commit_data *data);
1684 	unsigned long		flags;
1685 };
1686 
1687 struct nfs_pgio_completion_ops {
1688 	void	(*error_cleanup)(struct list_head *head, int);
1689 	void	(*init_hdr)(struct nfs_pgio_header *hdr);
1690 	void	(*completion)(struct nfs_pgio_header *hdr);
1691 	void	(*reschedule_io)(struct nfs_pgio_header *hdr);
1692 };
1693 
1694 struct nfs_unlinkdata {
1695 	struct nfs_removeargs args;
1696 	struct nfs_removeres res;
1697 	struct dentry *dentry;
1698 	wait_queue_head_t wq;
1699 	const struct cred *cred;
1700 	struct nfs_fattr dir_attr;
1701 	long timeout;
1702 };
1703 
1704 struct nfs_renamedata {
1705 	struct nfs_renameargs	args;
1706 	struct nfs_renameres	res;
1707 	struct rpc_task		task;
1708 	const struct cred	*cred;
1709 	struct inode		*old_dir;
1710 	struct dentry		*old_dentry;
1711 	struct nfs_fattr	old_fattr;
1712 	struct inode		*new_dir;
1713 	struct dentry		*new_dentry;
1714 	struct nfs_fattr	new_fattr;
1715 	void (*complete)(struct rpc_task *, struct nfs_renamedata *);
1716 	long timeout;
1717 	bool cancelled;
1718 };
1719 
1720 struct nfs_access_entry;
1721 struct nfs_client;
1722 struct rpc_timeout;
1723 struct nfs_subversion;
1724 struct nfs_mount_info;
1725 struct nfs_client_initdata;
1726 struct nfs_pageio_descriptor;
1727 struct fs_context;
1728 
1729 /*
1730  * RPC procedure vector for NFSv2/NFSv3 demuxing
1731  */
1732 struct nfs_rpc_ops {
1733 	u32	version;		/* Protocol version */
1734 	const struct dentry_operations *dentry_ops;
1735 	const struct inode_operations *dir_inode_ops;
1736 	const struct inode_operations *file_inode_ops;
1737 	const struct file_operations *file_ops;
1738 	const struct nlmclnt_operations *nlmclnt_ops;
1739 
1740 	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
1741 			    struct nfs_fsinfo *);
1742 	int	(*submount) (struct fs_context *, struct nfs_server *);
1743 	int	(*try_get_tree) (struct fs_context *);
1744 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
1745 			    struct nfs_fattr *, struct inode *);
1746 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
1747 			    struct iattr *);
1748 	int	(*lookup)  (struct inode *, struct dentry *,
1749 			    struct nfs_fh *, struct nfs_fattr *);
1750 	int	(*lookupp) (struct inode *, struct nfs_fh *,
1751 			    struct nfs_fattr *);
1752 	int	(*access)  (struct inode *, struct nfs_access_entry *, const struct cred *);
1753 	int	(*readlink)(struct inode *, struct page *, unsigned int,
1754 			    unsigned int);
1755 	int	(*create)  (struct inode *, struct dentry *,
1756 			    struct iattr *, int);
1757 	int	(*remove)  (struct inode *, struct dentry *);
1758 	void	(*unlink_setup)  (struct rpc_message *, struct dentry *, struct inode *);
1759 	void	(*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
1760 	int	(*unlink_done) (struct rpc_task *, struct inode *);
1761 	void	(*rename_setup)  (struct rpc_message *msg,
1762 			struct dentry *old_dentry,
1763 			struct dentry *new_dentry);
1764 	void	(*rename_rpc_prepare)(struct rpc_task *task, struct nfs_renamedata *);
1765 	int	(*rename_done) (struct rpc_task *task, struct inode *old_dir, struct inode *new_dir);
1766 	int	(*link)    (struct inode *, struct inode *, const struct qstr *);
1767 	int	(*symlink) (struct inode *, struct dentry *, struct page *,
1768 			    unsigned int, struct iattr *);
1769 	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
1770 	int	(*rmdir)   (struct inode *, const struct qstr *);
1771 	int	(*readdir) (struct nfs_readdir_arg *, struct nfs_readdir_res *);
1772 	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
1773 			    dev_t);
1774 	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
1775 			    struct nfs_fsstat *);
1776 	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,
1777 			    struct nfs_fsinfo *);
1778 	int	(*pathconf) (struct nfs_server *, struct nfs_fh *,
1779 			     struct nfs_pathconf *);
1780 	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
1781 	int	(*decode_dirent)(struct xdr_stream *, struct nfs_entry *, bool);
1782 	int	(*pgio_rpc_prepare)(struct rpc_task *,
1783 				    struct nfs_pgio_header *);
1784 	void	(*read_setup)(struct nfs_pgio_header *, struct rpc_message *);
1785 	int	(*read_done)(struct rpc_task *, struct nfs_pgio_header *);
1786 	void	(*write_setup)(struct nfs_pgio_header *, struct rpc_message *,
1787 				struct rpc_clnt **);
1788 	int	(*write_done)(struct rpc_task *, struct nfs_pgio_header *);
1789 	void	(*commit_setup) (struct nfs_commit_data *, struct rpc_message *,
1790 				struct rpc_clnt **);
1791 	void	(*commit_rpc_prepare)(struct rpc_task *, struct nfs_commit_data *);
1792 	int	(*commit_done) (struct rpc_task *, struct nfs_commit_data *);
1793 	int	(*lock)(struct file *, int, struct file_lock *);
1794 	int	(*lock_check_bounds)(const struct file_lock *);
1795 	void	(*clear_acl_cache)(struct inode *);
1796 	void	(*close_context)(struct nfs_open_context *ctx, int);
1797 	struct inode * (*open_context) (struct inode *dir,
1798 				struct nfs_open_context *ctx,
1799 				int open_flags,
1800 				struct iattr *iattr,
1801 				int *);
1802 	int (*have_delegation)(struct inode *, fmode_t);
1803 	struct nfs_client *(*alloc_client) (const struct nfs_client_initdata *);
1804 	struct nfs_client *(*init_client) (struct nfs_client *,
1805 				const struct nfs_client_initdata *);
1806 	void	(*free_client) (struct nfs_client *);
1807 	struct nfs_server *(*create_server)(struct fs_context *);
1808 	struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *,
1809 					   struct nfs_fattr *, rpc_authflavor_t);
1810 	int	(*discover_trunking)(struct nfs_server *, struct nfs_fh *);
1811 	void	(*enable_swap)(struct inode *inode);
1812 	void	(*disable_swap)(struct inode *inode);
1813 };
1814 
1815 /*
1816  * 	NFS_CALL(getattr, inode, (fattr));
1817  * into
1818  *	NFS_PROTO(inode)->getattr(fattr);
1819  */
1820 #define NFS_CALL(op, inode, args)	NFS_PROTO(inode)->op args
1821 
1822 /*
1823  * Function vectors etc. for the NFS client
1824  */
1825 extern const struct nfs_rpc_ops	nfs_v2_clientops;
1826 extern const struct nfs_rpc_ops	nfs_v3_clientops;
1827 extern const struct nfs_rpc_ops	nfs_v4_clientops;
1828 extern const struct rpc_version nfs_version2;
1829 extern const struct rpc_version nfs_version3;
1830 extern const struct rpc_version nfs_version4;
1831 
1832 extern const struct rpc_version nfsacl_version3;
1833 extern const struct rpc_program nfsacl_program;
1834 
1835 #endif
1836