1 /*
2 * Server-side types for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 */
36
37 #ifndef _LINUX_NFSD_XDR4_H
38 #define _LINUX_NFSD_XDR4_H
39
40 #include "state.h"
41 #include "nfsd.h"
42
43 #define NFSD4_MAX_TAGLEN 128
44 #define XDR_LEN(n) (((n) + 3) & ~3)
45
46 #define CURRENT_STATE_ID_FLAG (1<<0)
47 #define SAVED_STATE_ID_FLAG (1<<1)
48
49 #define SET_CSTATE_FLAG(c, f) ((c)->sid_flags |= (f))
50 #define HAS_CSTATE_FLAG(c, f) ((c)->sid_flags & (f))
51 #define CLEAR_CSTATE_FLAG(c, f) ((c)->sid_flags &= ~(f))
52
53 /**
54 * nfsd4_encode_bool - Encode an XDR bool type result
55 * @xdr: target XDR stream
56 * @val: boolean value to encode
57 *
58 * Return values:
59 * %nfs_ok: @val encoded; @xdr advanced to next position
60 * %nfserr_resource: stream buffer space exhausted
61 */
62 static __always_inline __be32
nfsd4_encode_bool(struct xdr_stream * xdr,bool val)63 nfsd4_encode_bool(struct xdr_stream *xdr, bool val)
64 {
65 __be32 *p = xdr_reserve_space(xdr, XDR_UNIT);
66
67 if (unlikely(p == NULL))
68 return nfserr_resource;
69 *p = val ? xdr_one : xdr_zero;
70 return nfs_ok;
71 }
72
73 /**
74 * nfsd4_encode_uint32_t - Encode an XDR uint32_t type result
75 * @xdr: target XDR stream
76 * @val: integer value to encode
77 *
78 * Return values:
79 * %nfs_ok: @val encoded; @xdr advanced to next position
80 * %nfserr_resource: stream buffer space exhausted
81 */
82 static __always_inline __be32
nfsd4_encode_uint32_t(struct xdr_stream * xdr,u32 val)83 nfsd4_encode_uint32_t(struct xdr_stream *xdr, u32 val)
84 {
85 __be32 *p = xdr_reserve_space(xdr, XDR_UNIT);
86
87 if (unlikely(p == NULL))
88 return nfserr_resource;
89 *p = cpu_to_be32(val);
90 return nfs_ok;
91 }
92
93 #define nfsd4_encode_aceflag4(x, v) nfsd4_encode_uint32_t(x, v)
94 #define nfsd4_encode_acemask4(x, v) nfsd4_encode_uint32_t(x, v)
95 #define nfsd4_encode_acetype4(x, v) nfsd4_encode_uint32_t(x, v)
96 #define nfsd4_encode_count4(x, v) nfsd4_encode_uint32_t(x, v)
97 #define nfsd4_encode_mode4(x, v) nfsd4_encode_uint32_t(x, v)
98 #define nfsd4_encode_nfs_lease4(x, v) nfsd4_encode_uint32_t(x, v)
99 #define nfsd4_encode_qop4(x, v) nfsd4_encode_uint32_t(x, v)
100 #define nfsd4_encode_sequenceid4(x, v) nfsd4_encode_uint32_t(x, v)
101 #define nfsd4_encode_slotid4(x, v) nfsd4_encode_uint32_t(x, v)
102
103 /**
104 * nfsd4_encode_uint64_t - Encode an XDR uint64_t type result
105 * @xdr: target XDR stream
106 * @val: integer value to encode
107 *
108 * Return values:
109 * %nfs_ok: @val encoded; @xdr advanced to next position
110 * %nfserr_resource: stream buffer space exhausted
111 */
112 static __always_inline __be32
nfsd4_encode_uint64_t(struct xdr_stream * xdr,u64 val)113 nfsd4_encode_uint64_t(struct xdr_stream *xdr, u64 val)
114 {
115 __be32 *p = xdr_reserve_space(xdr, XDR_UNIT * 2);
116
117 if (unlikely(p == NULL))
118 return nfserr_resource;
119 put_unaligned_be64(val, p);
120 return nfs_ok;
121 }
122
123 #define nfsd4_encode_changeid4(x, v) nfsd4_encode_uint64_t(x, v)
124 #define nfsd4_encode_nfs_cookie4(x, v) nfsd4_encode_uint64_t(x, v)
125 #define nfsd4_encode_length4(x, v) nfsd4_encode_uint64_t(x, v)
126 #define nfsd4_encode_offset4(x, v) nfsd4_encode_uint64_t(x, v)
127
128 /**
129 * nfsd4_encode_opaque_fixed - Encode a fixed-length XDR opaque type result
130 * @xdr: target XDR stream
131 * @data: pointer to data
132 * @size: length of data in bytes
133 *
134 * Return values:
135 * %nfs_ok: @data encoded; @xdr advanced to next position
136 * %nfserr_resource: stream buffer space exhausted
137 */
138 static __always_inline __be32
nfsd4_encode_opaque_fixed(struct xdr_stream * xdr,const void * data,size_t size)139 nfsd4_encode_opaque_fixed(struct xdr_stream *xdr, const void *data,
140 size_t size)
141 {
142 __be32 *p = xdr_reserve_space(xdr, xdr_align_size(size));
143 size_t pad = xdr_pad_size(size);
144
145 if (unlikely(p == NULL))
146 return nfserr_resource;
147 memcpy(p, data, size);
148 if (pad)
149 memset((char *)p + size, 0, pad);
150 return nfs_ok;
151 }
152
153 /**
154 * nfsd4_encode_opaque - Encode a variable-length XDR opaque type result
155 * @xdr: target XDR stream
156 * @data: pointer to data
157 * @size: length of data in bytes
158 *
159 * Return values:
160 * %nfs_ok: @data encoded; @xdr advanced to next position
161 * %nfserr_resource: stream buffer space exhausted
162 */
163 static __always_inline __be32
nfsd4_encode_opaque(struct xdr_stream * xdr,const void * data,size_t size)164 nfsd4_encode_opaque(struct xdr_stream *xdr, const void *data, size_t size)
165 {
166 size_t pad = xdr_pad_size(size);
167 __be32 *p;
168
169 p = xdr_reserve_space(xdr, XDR_UNIT + xdr_align_size(size));
170 if (unlikely(p == NULL))
171 return nfserr_resource;
172 *p++ = cpu_to_be32(size);
173 memcpy(p, data, size);
174 if (pad)
175 memset((char *)p + size, 0, pad);
176 return nfs_ok;
177 }
178
179 #define nfsd4_encode_component4(x, d, s) nfsd4_encode_opaque(x, d, s)
180
181 struct nfsd4_compound_state {
182 struct svc_fh current_fh;
183 struct svc_fh save_fh;
184 struct nfs4_stateowner *replay_owner;
185 struct nfs4_client *clp;
186 /* For sessions DRC */
187 struct nfsd4_session *session;
188 struct nfsd4_slot *slot;
189 int data_offset;
190 bool spo_must_allowed;
191 size_t iovlen;
192 u32 minorversion;
193 __be32 status;
194 stateid_t current_stateid;
195 stateid_t save_stateid;
196 /* to indicate current and saved state id presents */
197 u32 sid_flags;
198 };
199
nfsd4_has_session(struct nfsd4_compound_state * cs)200 static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
201 {
202 return cs->slot != NULL;
203 }
204
205 struct nfsd4_change_info {
206 u32 atomic;
207 u64 before_change;
208 u64 after_change;
209 };
210
211 struct nfsd4_access {
212 u32 ac_req_access; /* request */
213 u32 ac_supported; /* response */
214 u32 ac_resp_access; /* response */
215 };
216
217 struct nfsd4_close {
218 u32 cl_seqid; /* request */
219 stateid_t cl_stateid; /* request+response */
220 };
221
222 struct nfsd4_commit {
223 u64 co_offset; /* request */
224 u32 co_count; /* request */
225 nfs4_verifier co_verf; /* response */
226 };
227
228 struct nfsd4_create {
229 u32 cr_namelen; /* request */
230 char * cr_name; /* request */
231 u32 cr_type; /* request */
232 union { /* request */
233 struct {
234 u32 datalen;
235 char *data;
236 struct kvec first;
237 } link; /* NF4LNK */
238 struct {
239 u32 specdata1;
240 u32 specdata2;
241 } dev; /* NF4BLK, NF4CHR */
242 } u;
243 u32 cr_bmval[3]; /* request */
244 struct iattr cr_iattr; /* request */
245 int cr_umask; /* request */
246 struct nfsd4_change_info cr_cinfo; /* response */
247 struct nfs4_acl *cr_acl;
248 struct xdr_netobj cr_label;
249 };
250 #define cr_datalen u.link.datalen
251 #define cr_data u.link.data
252 #define cr_first u.link.first
253 #define cr_specdata1 u.dev.specdata1
254 #define cr_specdata2 u.dev.specdata2
255
256 struct nfsd4_delegreturn {
257 stateid_t dr_stateid;
258 };
259
260 struct nfsd4_getattr {
261 u32 ga_bmval[3]; /* request */
262 struct svc_fh *ga_fhp; /* response */
263 };
264
265 struct nfsd4_link {
266 u32 li_namelen; /* request */
267 char * li_name; /* request */
268 struct nfsd4_change_info li_cinfo; /* response */
269 };
270
271 struct nfsd4_lock_denied {
272 clientid_t ld_clientid;
273 struct xdr_netobj ld_owner;
274 u64 ld_start;
275 u64 ld_length;
276 u32 ld_type;
277 };
278
279 struct nfsd4_lock {
280 /* request */
281 u32 lk_type;
282 u32 lk_reclaim; /* boolean */
283 u64 lk_offset;
284 u64 lk_length;
285 u32 lk_is_new;
286 union {
287 struct {
288 u32 open_seqid;
289 stateid_t open_stateid;
290 u32 lock_seqid;
291 clientid_t clientid;
292 struct xdr_netobj owner;
293 } new;
294 struct {
295 stateid_t lock_stateid;
296 u32 lock_seqid;
297 } old;
298 } v;
299
300 /* response */
301 stateid_t lk_resp_stateid;
302 struct nfsd4_lock_denied lk_denied;
303 };
304 #define lk_new_open_seqid v.new.open_seqid
305 #define lk_new_open_stateid v.new.open_stateid
306 #define lk_new_lock_seqid v.new.lock_seqid
307 #define lk_new_clientid v.new.clientid
308 #define lk_new_owner v.new.owner
309 #define lk_old_lock_stateid v.old.lock_stateid
310 #define lk_old_lock_seqid v.old.lock_seqid
311
312 struct nfsd4_lockt {
313 u32 lt_type;
314 clientid_t lt_clientid;
315 struct xdr_netobj lt_owner;
316 u64 lt_offset;
317 u64 lt_length;
318 struct nfsd4_lock_denied lt_denied;
319 };
320
321 struct nfsd4_locku {
322 u32 lu_type;
323 u32 lu_seqid;
324 stateid_t lu_stateid;
325 u64 lu_offset;
326 u64 lu_length;
327 };
328
329
330 struct nfsd4_lookup {
331 u32 lo_len; /* request */
332 char * lo_name; /* request */
333 };
334
335 struct nfsd4_putfh {
336 u32 pf_fhlen; /* request */
337 char *pf_fhval; /* request */
338 bool no_verify; /* represents foreigh fh */
339 };
340
341 struct nfsd4_getxattr {
342 char *getxa_name; /* request */
343 u32 getxa_len; /* request */
344 void *getxa_buf;
345 };
346
347 struct nfsd4_setxattr {
348 u32 setxa_flags; /* request */
349 char *setxa_name; /* request */
350 char *setxa_buf; /* request */
351 u32 setxa_len; /* request */
352 struct nfsd4_change_info setxa_cinfo; /* response */
353 };
354
355 struct nfsd4_removexattr {
356 char *rmxa_name; /* request */
357 struct nfsd4_change_info rmxa_cinfo; /* response */
358 };
359
360 struct nfsd4_listxattrs {
361 u64 lsxa_cookie; /* request */
362 u32 lsxa_maxcount; /* request */
363 char *lsxa_buf; /* unfiltered buffer (reply) */
364 u32 lsxa_len; /* unfiltered len (reply) */
365 };
366
367 struct nfsd4_open {
368 u32 op_claim_type; /* request */
369 u32 op_fnamelen;
370 char * op_fname; /* request - everything but CLAIM_PREV */
371 u32 op_delegate_type; /* request - CLAIM_PREV only */
372 stateid_t op_delegate_stateid; /* request - response */
373 u32 op_why_no_deleg; /* response - DELEG_NONE_EXT only */
374 u32 op_create; /* request */
375 u32 op_createmode; /* request */
376 int op_umask; /* request */
377 u32 op_bmval[3]; /* request */
378 struct iattr op_iattr; /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
379 nfs4_verifier op_verf __attribute__((aligned(32)));
380 /* EXCLUSIVE4 */
381 clientid_t op_clientid; /* request */
382 struct xdr_netobj op_owner; /* request */
383 u32 op_seqid; /* request */
384 u32 op_share_access; /* request */
385 u32 op_share_deny; /* request */
386 u32 op_deleg_want; /* request */
387 stateid_t op_stateid; /* response */
388 __be32 op_xdr_error; /* see nfsd4_open_omfg() */
389 struct nfsd4_change_info op_cinfo; /* response */
390 u32 op_rflags; /* response */
391 bool op_recall; /* response */
392 bool op_truncate; /* used during processing */
393 bool op_created; /* used during processing */
394 struct nfs4_openowner *op_openowner; /* used during processing */
395 struct file *op_filp; /* used during processing */
396 struct nfs4_file *op_file; /* used during processing */
397 struct nfs4_ol_stateid *op_stp; /* used during processing */
398 struct nfs4_clnt_odstate *op_odstate; /* used during processing */
399 struct nfs4_acl *op_acl;
400 struct xdr_netobj op_label;
401 struct svc_rqst *op_rqstp;
402 };
403
404 struct nfsd4_open_confirm {
405 stateid_t oc_req_stateid /* request */;
406 u32 oc_seqid /* request */;
407 stateid_t oc_resp_stateid /* response */;
408 };
409
410 struct nfsd4_open_downgrade {
411 stateid_t od_stateid;
412 u32 od_seqid;
413 u32 od_share_access; /* request */
414 u32 od_deleg_want; /* request */
415 u32 od_share_deny; /* request */
416 };
417
418
419 struct nfsd4_read {
420 stateid_t rd_stateid; /* request */
421 u64 rd_offset; /* request */
422 u32 rd_length; /* request */
423 int rd_vlen;
424 struct nfsd_file *rd_nf;
425
426 struct svc_rqst *rd_rqstp; /* response */
427 struct svc_fh *rd_fhp; /* response */
428 u32 rd_eof; /* response */
429 };
430
431 struct nfsd4_readdir {
432 u64 rd_cookie; /* request */
433 nfs4_verifier rd_verf; /* request */
434 u32 rd_dircount; /* request */
435 u32 rd_maxcount; /* request */
436 u32 rd_bmval[3]; /* request */
437 struct svc_rqst *rd_rqstp; /* response */
438 struct svc_fh * rd_fhp; /* response */
439
440 struct readdir_cd common;
441 struct xdr_stream *xdr;
442 int cookie_offset;
443 };
444
445 struct nfsd4_release_lockowner {
446 clientid_t rl_clientid;
447 struct xdr_netobj rl_owner;
448 };
449 struct nfsd4_readlink {
450 struct svc_rqst *rl_rqstp; /* request */
451 struct svc_fh * rl_fhp; /* request */
452 };
453
454 struct nfsd4_remove {
455 u32 rm_namelen; /* request */
456 char * rm_name; /* request */
457 struct nfsd4_change_info rm_cinfo; /* response */
458 };
459
460 struct nfsd4_rename {
461 u32 rn_snamelen; /* request */
462 char * rn_sname; /* request */
463 u32 rn_tnamelen; /* request */
464 char * rn_tname; /* request */
465 struct nfsd4_change_info rn_sinfo; /* response */
466 struct nfsd4_change_info rn_tinfo; /* response */
467 };
468
469 struct nfsd4_secinfo {
470 u32 si_namelen; /* request */
471 char *si_name; /* request */
472 struct svc_export *si_exp; /* response */
473 };
474
475 struct nfsd4_secinfo_no_name {
476 u32 sin_style; /* request */
477 struct svc_export *sin_exp; /* response */
478 };
479
480 struct nfsd4_setattr {
481 stateid_t sa_stateid; /* request */
482 u32 sa_bmval[3]; /* request */
483 struct iattr sa_iattr; /* request */
484 struct nfs4_acl *sa_acl;
485 struct xdr_netobj sa_label;
486 };
487
488 struct nfsd4_setclientid {
489 nfs4_verifier se_verf; /* request */
490 struct xdr_netobj se_name;
491 u32 se_callback_prog; /* request */
492 u32 se_callback_netid_len; /* request */
493 char * se_callback_netid_val; /* request */
494 u32 se_callback_addr_len; /* request */
495 char * se_callback_addr_val; /* request */
496 u32 se_callback_ident; /* request */
497 clientid_t se_clientid; /* response */
498 nfs4_verifier se_confirm; /* response */
499 };
500
501 struct nfsd4_setclientid_confirm {
502 clientid_t sc_clientid;
503 nfs4_verifier sc_confirm;
504 };
505
506 struct nfsd4_test_stateid_id {
507 __be32 ts_id_status;
508 stateid_t ts_id_stateid;
509 struct list_head ts_id_list;
510 };
511
512 struct nfsd4_test_stateid {
513 u32 ts_num_ids;
514 struct list_head ts_stateid_list;
515 };
516
517 struct nfsd4_free_stateid {
518 stateid_t fr_stateid; /* request */
519 };
520
521 struct nfsd4_get_dir_delegation {
522 /* request */
523 u32 gdda_signal_deleg_avail;
524 u32 gdda_notification_types[1];
525 struct timespec64 gdda_child_attr_delay;
526 struct timespec64 gdda_dir_attr_delay;
527 u32 gdda_child_attributes[3];
528 u32 gdda_dir_attributes[3];
529 /* response */
530 u32 gddrnf_status;
531 nfs4_verifier gddr_cookieverf;
532 stateid_t gddr_stateid;
533 u32 gddr_notification[1];
534 u32 gddr_child_attributes[3];
535 u32 gddr_dir_attributes[3];
536 bool gddrnf_will_signal_deleg_avail;
537 };
538
539 /* also used for NVERIFY */
540 struct nfsd4_verify {
541 u32 ve_bmval[3]; /* request */
542 u32 ve_attrlen; /* request */
543 char * ve_attrval; /* request */
544 };
545
546 struct nfsd4_write {
547 stateid_t wr_stateid; /* request */
548 u64 wr_offset; /* request */
549 u32 wr_stable_how; /* request */
550 u32 wr_buflen; /* request */
551 struct xdr_buf wr_payload; /* request */
552
553 u32 wr_bytes_written; /* response */
554 u32 wr_how_written; /* response */
555 nfs4_verifier wr_verifier; /* response */
556 };
557
558 struct nfsd4_exchange_id {
559 nfs4_verifier verifier;
560 struct xdr_netobj clname;
561 u32 flags;
562 clientid_t clientid;
563 u32 seqid;
564 u32 spa_how;
565 u32 spo_must_enforce[3];
566 u32 spo_must_allow[3];
567 struct xdr_netobj nii_domain;
568 struct xdr_netobj nii_name;
569 struct timespec64 nii_time;
570 char *server_impl_name;
571 };
572
573 struct nfsd4_sequence {
574 struct nfs4_sessionid sessionid; /* request/response */
575 u32 seqid; /* request/response */
576 u32 slotid; /* request/response */
577 u32 maxslots; /* request/response */
578 u32 cachethis; /* request */
579 u32 target_maxslots; /* response */
580 u32 status_flags; /* response */
581 };
582
583 struct nfsd4_destroy_session {
584 struct nfs4_sessionid sessionid;
585 };
586
587 struct nfsd4_destroy_clientid {
588 clientid_t clientid;
589 };
590
591 struct nfsd4_reclaim_complete {
592 u32 rca_one_fs;
593 };
594
595 struct nfsd4_deviceid {
596 u64 fsid_idx;
597 u32 generation;
598 };
599
600 static inline __be32 *
svcxdr_encode_deviceid4(__be32 * p,const struct nfsd4_deviceid * devid)601 svcxdr_encode_deviceid4(__be32 *p, const struct nfsd4_deviceid *devid)
602 {
603 __be64 *q = (__be64 *)p;
604
605 *q = (__force __be64)devid->fsid_idx;
606 p += 2;
607 *p++ = (__force __be32)devid->generation;
608 *p++ = xdr_zero;
609 return p;
610 }
611
612 static inline __be32 *
svcxdr_decode_deviceid4(__be32 * p,struct nfsd4_deviceid * devid)613 svcxdr_decode_deviceid4(__be32 *p, struct nfsd4_deviceid *devid)
614 {
615 __be64 *q = (__be64 *)p;
616
617 devid->fsid_idx = (__force u64)(*q);
618 p += 2;
619 devid->generation = (__force u32)(*p++);
620 p++; /* NFSD does not use the remaining octets */
621 return p;
622 }
623
624 static inline __be32
nfsd4_decode_deviceid4(struct xdr_stream * xdr,struct nfsd4_deviceid * devid)625 nfsd4_decode_deviceid4(struct xdr_stream *xdr, struct nfsd4_deviceid *devid)
626 {
627 __be32 *p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
628
629 if (unlikely(!p))
630 return nfserr_bad_xdr;
631 svcxdr_decode_deviceid4(p, devid);
632 return nfs_ok;
633 }
634
635 struct nfsd4_layout_seg {
636 u32 iomode;
637 u64 offset;
638 u64 length;
639 };
640
641 struct nfsd4_getdeviceinfo {
642 struct nfsd4_deviceid gd_devid; /* request */
643 u32 gd_layout_type; /* request */
644 u32 gd_maxcount; /* request */
645 u32 gd_notify_types;/* request - response */
646 void *gd_device; /* response */
647 };
648
649 struct nfsd4_layoutget {
650 u64 lg_minlength; /* request */
651 u32 lg_signal; /* request */
652 u32 lg_layout_type; /* request */
653 u32 lg_maxcount; /* request */
654 stateid_t lg_sid; /* request/response */
655 struct nfsd4_layout_seg lg_seg; /* request/response */
656 void *lg_content; /* response */
657 };
658
659 struct nfsd4_layoutcommit {
660 stateid_t lc_sid; /* request */
661 struct nfsd4_layout_seg lc_seg; /* request */
662 u32 lc_reclaim; /* request */
663 u32 lc_newoffset; /* request */
664 u64 lc_last_wr; /* request */
665 struct timespec64 lc_mtime; /* request */
666 u32 lc_layout_type; /* request */
667 struct xdr_buf lc_up_layout; /* decoded by callback */
668 bool lc_size_chg; /* response */
669 u64 lc_newsize; /* response */
670 };
671
672 struct nfsd4_layoutreturn {
673 u32 lr_return_type; /* request */
674 u32 lr_layout_type; /* request */
675 struct nfsd4_layout_seg lr_seg; /* request */
676 u32 lr_reclaim; /* request */
677 u32 lrf_body_len; /* request */
678 void *lrf_body; /* request */
679 stateid_t lr_sid; /* request/response */
680 bool lrs_present; /* response */
681 };
682
683 struct nfsd4_fallocate {
684 /* request */
685 stateid_t falloc_stateid;
686 loff_t falloc_offset;
687 u64 falloc_length;
688 };
689
690 struct nfsd4_clone {
691 /* request */
692 stateid_t cl_src_stateid;
693 stateid_t cl_dst_stateid;
694 u64 cl_src_pos;
695 u64 cl_dst_pos;
696 u64 cl_count;
697 };
698
699 struct nfsd42_write_res {
700 u64 wr_bytes_written;
701 u32 wr_stable_how;
702 nfs4_verifier wr_verifier;
703 stateid_t cb_stateid;
704 };
705
706 struct nfsd4_cb_offload {
707 struct nfsd4_callback co_cb;
708 struct nfsd42_write_res co_res;
709 __be32 co_nfserr;
710 unsigned int co_retries;
711 struct knfsd_fh co_fh;
712
713 struct nfs4_sessionid co_referring_sessionid;
714 u32 co_referring_slotid;
715 u32 co_referring_seqno;
716 };
717
718 struct nfsd4_copy {
719 /* request */
720 stateid_t cp_src_stateid;
721 stateid_t cp_dst_stateid;
722 u64 cp_src_pos;
723 u64 cp_dst_pos;
724 u64 cp_count;
725 struct nl4_server *cp_src;
726
727 unsigned long cp_flags;
728 #define NFSD4_COPY_F_STOPPED (0)
729 #define NFSD4_COPY_F_INTRA (1)
730 #define NFSD4_COPY_F_SYNCHRONOUS (2)
731 #define NFSD4_COPY_F_COMMITTED (3)
732 #define NFSD4_COPY_F_COMPLETED (4)
733 #define NFSD4_COPY_F_OFFLOAD_DONE (5)
734
735 /* response */
736 __be32 nfserr;
737 struct nfsd42_write_res cp_res;
738 struct knfsd_fh fh;
739
740 /* offload callback */
741 struct nfsd4_cb_offload cp_cb_offload;
742
743 struct nfs4_client *cp_clp;
744
745 struct nfsd_file *nf_src;
746 struct nfsd_file *nf_dst;
747
748 copy_stateid_t cp_stateid;
749
750 struct list_head copies;
751 struct task_struct *copy_task;
752 refcount_t refcount;
753 unsigned int cp_ttl;
754
755 struct nfsd4_ssc_umount_item *ss_nsui;
756 struct nfs_fh c_fh;
757 nfs4_stateid stateid;
758 struct nfsd_net *cp_nn;
759 };
760
nfsd4_copy_set_sync(struct nfsd4_copy * copy,bool sync)761 static inline void nfsd4_copy_set_sync(struct nfsd4_copy *copy, bool sync)
762 {
763 if (sync)
764 set_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
765 else
766 clear_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
767 }
768
nfsd4_copy_is_sync(const struct nfsd4_copy * copy)769 static inline bool nfsd4_copy_is_sync(const struct nfsd4_copy *copy)
770 {
771 return test_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
772 }
773
nfsd4_copy_is_async(const struct nfsd4_copy * copy)774 static inline bool nfsd4_copy_is_async(const struct nfsd4_copy *copy)
775 {
776 return !test_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
777 }
778
nfsd4_ssc_is_inter(const struct nfsd4_copy * copy)779 static inline bool nfsd4_ssc_is_inter(const struct nfsd4_copy *copy)
780 {
781 return !test_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
782 }
783
784 struct nfsd4_seek {
785 /* request */
786 stateid_t seek_stateid;
787 loff_t seek_offset;
788 u32 seek_whence;
789
790 /* response */
791 u32 seek_eof;
792 loff_t seek_pos;
793 };
794
795 struct nfsd4_offload_status {
796 /* request */
797 stateid_t stateid;
798
799 /* response */
800 u64 count;
801 __be32 status;
802 bool completed;
803 };
804
805 struct nfsd4_copy_notify {
806 /* request */
807 stateid_t cpn_src_stateid;
808 struct nl4_server *cpn_dst;
809
810 /* response */
811 stateid_t cpn_cnr_stateid;
812 struct timespec64 cpn_lease_time;
813 struct nl4_server *cpn_src;
814 };
815
816 struct nfsd4_op {
817 u32 opnum;
818 __be32 status;
819 const struct nfsd4_operation *opdesc;
820 struct nfs4_replay *replay;
821 union nfsd4_op_u {
822 struct nfsd4_access access;
823 struct nfsd4_close close;
824 struct nfsd4_commit commit;
825 struct nfsd4_create create;
826 struct nfsd4_delegreturn delegreturn;
827 struct nfsd4_getattr getattr;
828 struct svc_fh * getfh;
829 struct nfsd4_link link;
830 struct nfsd4_lock lock;
831 struct nfsd4_lockt lockt;
832 struct nfsd4_locku locku;
833 struct nfsd4_lookup lookup;
834 struct nfsd4_verify nverify;
835 struct nfsd4_open open;
836 struct nfsd4_open_confirm open_confirm;
837 struct nfsd4_open_downgrade open_downgrade;
838 struct nfsd4_putfh putfh;
839 struct nfsd4_read read;
840 struct nfsd4_readdir readdir;
841 struct nfsd4_readlink readlink;
842 struct nfsd4_remove remove;
843 struct nfsd4_rename rename;
844 clientid_t renew;
845 struct nfsd4_secinfo secinfo;
846 struct nfsd4_setattr setattr;
847 struct nfsd4_setclientid setclientid;
848 struct nfsd4_setclientid_confirm setclientid_confirm;
849 struct nfsd4_verify verify;
850 struct nfsd4_write write;
851 struct nfsd4_release_lockowner release_lockowner;
852
853 /* NFSv4.1 */
854 struct nfsd4_exchange_id exchange_id;
855 struct nfsd4_backchannel_ctl backchannel_ctl;
856 struct nfsd4_bind_conn_to_session bind_conn_to_session;
857 struct nfsd4_create_session create_session;
858 struct nfsd4_destroy_session destroy_session;
859 struct nfsd4_destroy_clientid destroy_clientid;
860 struct nfsd4_sequence sequence;
861 struct nfsd4_reclaim_complete reclaim_complete;
862 struct nfsd4_test_stateid test_stateid;
863 struct nfsd4_free_stateid free_stateid;
864 struct nfsd4_get_dir_delegation get_dir_delegation;
865 struct nfsd4_getdeviceinfo getdeviceinfo;
866 struct nfsd4_layoutget layoutget;
867 struct nfsd4_layoutcommit layoutcommit;
868 struct nfsd4_layoutreturn layoutreturn;
869 struct nfsd4_secinfo_no_name secinfo_no_name;
870
871 /* NFSv4.2 */
872 struct nfsd4_fallocate allocate;
873 struct nfsd4_fallocate deallocate;
874 struct nfsd4_clone clone;
875 struct nfsd4_copy copy;
876 struct nfsd4_offload_status offload_status;
877 struct nfsd4_copy_notify copy_notify;
878 struct nfsd4_seek seek;
879
880 struct nfsd4_getxattr getxattr;
881 struct nfsd4_setxattr setxattr;
882 struct nfsd4_listxattrs listxattrs;
883 struct nfsd4_removexattr removexattr;
884 } u;
885 };
886
887 bool nfsd4_cache_this_op(struct nfsd4_op *);
888
889 /*
890 * Memory needed just for the duration of processing one compound:
891 */
892 struct svcxdr_tmpbuf {
893 struct svcxdr_tmpbuf *next;
894 char buf[];
895 };
896
897 struct nfsd4_compoundargs {
898 /* scratch variables for XDR decode */
899 struct xdr_stream *xdr;
900 struct svcxdr_tmpbuf *to_free;
901 struct svc_rqst *rqstp;
902
903 char * tag;
904 u32 taglen;
905 u32 minorversion;
906 u32 opcnt;
907 bool splice_ok;
908 struct nfsd4_op *ops;
909 struct nfsd4_op iops[8];
910 };
911
912 struct nfsd4_compoundres {
913 /* scratch variables for XDR encode */
914 struct xdr_stream *xdr;
915 struct svc_rqst * rqstp;
916
917 __be32 *statusp;
918 char * tag;
919 u32 taglen;
920 u32 opcnt;
921
922 struct nfsd4_compound_state cstate;
923 };
924
nfsd4_is_solo_sequence(struct nfsd4_compoundres * resp)925 static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
926 {
927 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
928 return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
929 }
930
931 /*
932 * The session reply cache only needs to cache replies that the client
933 * actually asked us to. But it's almost free for us to cache compounds
934 * consisting of only a SEQUENCE op, so we may as well cache those too.
935 * Also, the protocol doesn't give us a convenient response in the case
936 * of a replay of a solo SEQUENCE op that wasn't cached
937 * (RETRY_UNCACHED_REP can only be returned in the second op of a
938 * compound).
939 */
nfsd4_cache_this(struct nfsd4_compoundres * resp)940 static inline bool nfsd4_cache_this(struct nfsd4_compoundres *resp)
941 {
942 return (resp->cstate.slot->sl_flags & NFSD4_SLOT_CACHETHIS)
943 || nfsd4_is_solo_sequence(resp);
944 }
945
nfsd4_last_compound_op(struct svc_rqst * rqstp)946 static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
947 {
948 struct nfsd4_compoundres *resp = rqstp->rq_resp;
949 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
950
951 return argp->opcnt == resp->opcnt;
952 }
953
954 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op);
955 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op);
956 void warn_on_nonidempotent_op(struct nfsd4_op *op);
957
958 #define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs)
959
960 bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp);
961 bool nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
962 bool nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
963 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
964 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
965 void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op);
966 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
967 struct svc_fh *fhp, struct svc_export *exp,
968 struct dentry *dentry,
969 u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
970 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
971 struct nfsd4_compound_state *, union nfsd4_op_u *u);
972 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
973 struct nfsd4_compound_state *, union nfsd4_op_u *u);
974 void nfsd4_exchange_id_release(union nfsd4_op_u *u);
975 extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
976 struct nfsd4_compound_state *, union nfsd4_op_u *u);
977 extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *,
978 struct nfsd4_compound_state *, union nfsd4_op_u *u);
979 extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *,
980 struct nfsd4_compound_state *, union nfsd4_op_u *u);
981 extern __be32 nfsd4_create_session(struct svc_rqst *,
982 struct nfsd4_compound_state *, union nfsd4_op_u *u);
983 extern __be32 nfsd4_sequence(struct svc_rqst *,
984 struct nfsd4_compound_state *, union nfsd4_op_u *u);
985 extern void nfsd4_sequence_done(struct nfsd4_compoundres *resp);
986 extern __be32 nfsd4_destroy_session(struct svc_rqst *,
987 struct nfsd4_compound_state *, union nfsd4_op_u *u);
988 extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *,
989 union nfsd4_op_u *u);
990 __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *,
991 union nfsd4_op_u *u);
992 extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
993 struct nfsd4_open *open, struct nfsd_net *nn);
994 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
995 struct svc_fh *current_fh, struct nfsd4_open *open);
996 extern void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate);
997 extern void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
998 struct nfsd4_open *open);
999 extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
1000 struct nfsd4_compound_state *, union nfsd4_op_u *u);
1001 extern __be32 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
1002 union nfsd4_op_u *u);
1003 extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
1004 struct nfsd4_compound_state *, union nfsd4_op_u *u);
1005 extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
1006 union nfsd4_op_u *u);
1007 extern void nfsd4_lock_release(union nfsd4_op_u *u);
1008 extern __be32 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
1009 union nfsd4_op_u *u);
1010 extern void nfsd4_lockt_release(union nfsd4_op_u *u);
1011 extern __be32 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
1012 union nfsd4_op_u *u);
1013 extern __be32
1014 nfsd4_release_lockowner(struct svc_rqst *rqstp,
1015 struct nfsd4_compound_state *, union nfsd4_op_u *u);
1016 extern void nfsd4_release_compoundargs(struct svc_rqst *rqstp);
1017 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
1018 struct nfsd4_compound_state *, union nfsd4_op_u *u);
1019 extern __be32 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
1020 union nfsd4_op_u *u);
1021 extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp,
1022 struct nfsd4_compound_state *, union nfsd4_op_u *);
1023 extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,
1024 struct nfsd4_compound_state *, union nfsd4_op_u *);
1025 extern void nfsd4_bump_seqid(struct nfsd4_compound_state *, __be32 nfserr);
1026
1027 enum nfsd4_op_flags {
1028 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1029 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1030 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1031 /* For rfc 5661 section 2.6.3.1.1: */
1032 OP_HANDLES_WRONGSEC = 1 << 3,
1033 OP_IS_PUTFH_LIKE = 1 << 4,
1034 /*
1035 * These are the ops whose result size we estimate before
1036 * encoding, to avoid performing an op then not being able to
1037 * respond or cache a response. This includes writes and setattrs
1038 * as well as the operations usually called "nonidempotent":
1039 */
1040 OP_MODIFIES_SOMETHING = 1 << 5,
1041 /*
1042 * Cache compounds containing these ops in the xid-based drc:
1043 * We use the DRC for compounds containing non-idempotent
1044 * operations, *except* those that are 4.1-specific (since
1045 * sessions provide their own EOS), and except for stateful
1046 * operations other than setclientid and setclientid_confirm
1047 * (since sequence numbers provide EOS for open, lock, etc in
1048 * the v4.0 case).
1049 */
1050 OP_CACHEME = 1 << 6,
1051 /*
1052 * These are ops which clear current state id.
1053 */
1054 OP_CLEAR_STATEID = 1 << 7,
1055 /* Most ops return only an error on failure; some may do more: */
1056 OP_NONTRIVIAL_ERROR_ENCODE = 1 << 8,
1057 };
1058
1059 struct nfsd4_operation {
1060 __be32 (*op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1061 union nfsd4_op_u *);
1062 void (*op_release)(union nfsd4_op_u *);
1063 u32 op_flags;
1064 char *op_name;
1065 /* Try to get response size before operation */
1066 u32 (*op_rsize_bop)(const struct svc_rqst *rqstp,
1067 const struct nfsd4_op *op);
1068 void (*op_get_currentstateid)(struct nfsd4_compound_state *,
1069 union nfsd4_op_u *);
1070 void (*op_set_currentstateid)(struct nfsd4_compound_state *,
1071 union nfsd4_op_u *);
1072 };
1073
1074 struct nfsd4_cb_recall_any {
1075 struct nfsd4_callback ra_cb;
1076 u32 ra_keep;
1077 u32 ra_bmval[1];
1078 };
1079
1080 #endif
1081