ARM: 7747/1: pcpu: ensure __my_cpu_offset cannot be re-ordered across barrier()
[linux/fpc-iii.git] / fs / nfsd / xdr4.h
blob3b271d2092b6c7397bc6fa2cb61674290ecc831a
1 /*
2 * Server-side types for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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.
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.
37 #ifndef _LINUX_NFSD_XDR4_H
38 #define _LINUX_NFSD_XDR4_H
40 #include "state.h"
41 #include "nfsd.h"
43 #define NFSD4_MAX_TAGLEN 128
44 #define XDR_LEN(n) (((n) + 3) & ~3)
46 #define CURRENT_STATE_ID_FLAG (1<<0)
47 #define SAVED_STATE_ID_FLAG (1<<1)
49 #define SET_STATE_ID(c, f) ((c)->sid_flags |= (f))
50 #define HAS_STATE_ID(c, f) ((c)->sid_flags & (f))
51 #define CLEAR_STATE_ID(c, f) ((c)->sid_flags &= ~(f))
53 struct nfsd4_compound_state {
54 struct svc_fh current_fh;
55 struct svc_fh save_fh;
56 struct nfs4_stateowner *replay_owner;
57 /* For sessions DRC */
58 struct nfsd4_session *session;
59 struct nfsd4_slot *slot;
60 __be32 *datap;
61 size_t iovlen;
62 u32 minorversion;
63 __be32 status;
64 stateid_t current_stateid;
65 stateid_t save_stateid;
66 /* to indicate current and saved state id presents */
67 u32 sid_flags;
70 static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
72 return cs->slot != NULL;
75 struct nfsd4_change_info {
76 u32 atomic;
77 bool change_supported;
78 u32 before_ctime_sec;
79 u32 before_ctime_nsec;
80 u64 before_change;
81 u32 after_ctime_sec;
82 u32 after_ctime_nsec;
83 u64 after_change;
86 struct nfsd4_access {
87 u32 ac_req_access; /* request */
88 u32 ac_supported; /* response */
89 u32 ac_resp_access; /* response */
92 struct nfsd4_close {
93 u32 cl_seqid; /* request */
94 stateid_t cl_stateid; /* request+response */
97 struct nfsd4_commit {
98 u64 co_offset; /* request */
99 u32 co_count; /* request */
100 nfs4_verifier co_verf; /* response */
103 struct nfsd4_create {
104 u32 cr_namelen; /* request */
105 char * cr_name; /* request */
106 u32 cr_type; /* request */
107 union { /* request */
108 struct {
109 u32 namelen;
110 char *name;
111 } link; /* NF4LNK */
112 struct {
113 u32 specdata1;
114 u32 specdata2;
115 } dev; /* NF4BLK, NF4CHR */
116 } u;
117 u32 cr_bmval[3]; /* request */
118 struct iattr cr_iattr; /* request */
119 struct nfsd4_change_info cr_cinfo; /* response */
120 struct nfs4_acl *cr_acl;
122 #define cr_linklen u.link.namelen
123 #define cr_linkname u.link.name
124 #define cr_specdata1 u.dev.specdata1
125 #define cr_specdata2 u.dev.specdata2
127 struct nfsd4_delegreturn {
128 stateid_t dr_stateid;
131 struct nfsd4_getattr {
132 u32 ga_bmval[3]; /* request */
133 struct svc_fh *ga_fhp; /* response */
136 struct nfsd4_link {
137 u32 li_namelen; /* request */
138 char * li_name; /* request */
139 struct nfsd4_change_info li_cinfo; /* response */
142 struct nfsd4_lock_denied {
143 clientid_t ld_clientid;
144 struct xdr_netobj ld_owner;
145 u64 ld_start;
146 u64 ld_length;
147 u32 ld_type;
150 struct nfsd4_lock {
151 /* request */
152 u32 lk_type;
153 u32 lk_reclaim; /* boolean */
154 u64 lk_offset;
155 u64 lk_length;
156 u32 lk_is_new;
157 union {
158 struct {
159 u32 open_seqid;
160 stateid_t open_stateid;
161 u32 lock_seqid;
162 clientid_t clientid;
163 struct xdr_netobj owner;
164 } new;
165 struct {
166 stateid_t lock_stateid;
167 u32 lock_seqid;
168 } old;
169 } v;
171 /* response */
172 union {
173 struct {
174 stateid_t stateid;
175 } ok;
176 struct nfsd4_lock_denied denied;
177 } u;
179 #define lk_new_open_seqid v.new.open_seqid
180 #define lk_new_open_stateid v.new.open_stateid
181 #define lk_new_lock_seqid v.new.lock_seqid
182 #define lk_new_clientid v.new.clientid
183 #define lk_new_owner v.new.owner
184 #define lk_old_lock_stateid v.old.lock_stateid
185 #define lk_old_lock_seqid v.old.lock_seqid
187 #define lk_resp_stateid u.ok.stateid
188 #define lk_denied u.denied
191 struct nfsd4_lockt {
192 u32 lt_type;
193 clientid_t lt_clientid;
194 struct xdr_netobj lt_owner;
195 u64 lt_offset;
196 u64 lt_length;
197 struct nfsd4_lock_denied lt_denied;
201 struct nfsd4_locku {
202 u32 lu_type;
203 u32 lu_seqid;
204 stateid_t lu_stateid;
205 u64 lu_offset;
206 u64 lu_length;
210 struct nfsd4_lookup {
211 u32 lo_len; /* request */
212 char * lo_name; /* request */
215 struct nfsd4_putfh {
216 u32 pf_fhlen; /* request */
217 char *pf_fhval; /* request */
220 struct nfsd4_open {
221 u32 op_claim_type; /* request */
222 struct xdr_netobj op_fname; /* request - everything but CLAIM_PREV */
223 u32 op_delegate_type; /* request - CLAIM_PREV only */
224 stateid_t op_delegate_stateid; /* request - response */
225 u32 op_why_no_deleg; /* response - DELEG_NONE_EXT only */
226 u32 op_create; /* request */
227 u32 op_createmode; /* request */
228 u32 op_bmval[3]; /* request */
229 struct iattr iattr; /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
230 nfs4_verifier op_verf __attribute__((aligned(32)));
231 /* EXCLUSIVE4 */
232 clientid_t op_clientid; /* request */
233 struct xdr_netobj op_owner; /* request */
234 u32 op_seqid; /* request */
235 u32 op_share_access; /* request */
236 u32 op_share_deny; /* request */
237 u32 op_deleg_want; /* request */
238 stateid_t op_stateid; /* response */
239 __be32 op_xdr_error; /* see nfsd4_open_omfg() */
240 u32 op_recall; /* recall */
241 struct nfsd4_change_info op_cinfo; /* response */
242 u32 op_rflags; /* response */
243 bool op_truncate; /* used during processing */
244 bool op_created; /* used during processing */
245 struct nfs4_openowner *op_openowner; /* used during processing */
246 struct nfs4_file *op_file; /* used during processing */
247 struct nfs4_ol_stateid *op_stp; /* used during processing */
248 struct nfs4_acl *op_acl;
250 #define op_iattr iattr
252 struct nfsd4_open_confirm {
253 stateid_t oc_req_stateid /* request */;
254 u32 oc_seqid /* request */;
255 stateid_t oc_resp_stateid /* response */;
258 struct nfsd4_open_downgrade {
259 stateid_t od_stateid;
260 u32 od_seqid;
261 u32 od_share_access; /* request */
262 u32 od_deleg_want; /* request */
263 u32 od_share_deny; /* request */
267 struct nfsd4_read {
268 stateid_t rd_stateid; /* request */
269 u64 rd_offset; /* request */
270 u32 rd_length; /* request */
271 int rd_vlen;
272 struct file *rd_filp;
274 struct svc_rqst *rd_rqstp; /* response */
275 struct svc_fh * rd_fhp; /* response */
278 struct nfsd4_readdir {
279 u64 rd_cookie; /* request */
280 nfs4_verifier rd_verf; /* request */
281 u32 rd_dircount; /* request */
282 u32 rd_maxcount; /* request */
283 u32 rd_bmval[3]; /* request */
284 struct svc_rqst *rd_rqstp; /* response */
285 struct svc_fh * rd_fhp; /* response */
287 struct readdir_cd common;
288 __be32 * buffer;
289 int buflen;
290 __be32 * offset;
293 struct nfsd4_release_lockowner {
294 clientid_t rl_clientid;
295 struct xdr_netobj rl_owner;
297 struct nfsd4_readlink {
298 struct svc_rqst *rl_rqstp; /* request */
299 struct svc_fh * rl_fhp; /* request */
302 struct nfsd4_remove {
303 u32 rm_namelen; /* request */
304 char * rm_name; /* request */
305 struct nfsd4_change_info rm_cinfo; /* response */
308 struct nfsd4_rename {
309 u32 rn_snamelen; /* request */
310 char * rn_sname; /* request */
311 u32 rn_tnamelen; /* request */
312 char * rn_tname; /* request */
313 struct nfsd4_change_info rn_sinfo; /* response */
314 struct nfsd4_change_info rn_tinfo; /* response */
317 struct nfsd4_secinfo {
318 u32 si_namelen; /* request */
319 char *si_name; /* request */
320 struct svc_export *si_exp; /* response */
323 struct nfsd4_secinfo_no_name {
324 u32 sin_style; /* request */
325 struct svc_export *sin_exp; /* response */
328 struct nfsd4_setattr {
329 stateid_t sa_stateid; /* request */
330 u32 sa_bmval[3]; /* request */
331 struct iattr sa_iattr; /* request */
332 struct nfs4_acl *sa_acl;
335 struct nfsd4_setclientid {
336 nfs4_verifier se_verf; /* request */
337 struct xdr_netobj se_name;
338 u32 se_callback_prog; /* request */
339 u32 se_callback_netid_len; /* request */
340 char * se_callback_netid_val; /* request */
341 u32 se_callback_addr_len; /* request */
342 char * se_callback_addr_val; /* request */
343 u32 se_callback_ident; /* request */
344 clientid_t se_clientid; /* response */
345 nfs4_verifier se_confirm; /* response */
348 struct nfsd4_setclientid_confirm {
349 clientid_t sc_clientid;
350 nfs4_verifier sc_confirm;
353 struct nfsd4_saved_compoundargs {
354 __be32 *p;
355 __be32 *end;
356 int pagelen;
357 struct page **pagelist;
360 struct nfsd4_test_stateid_id {
361 __be32 ts_id_status;
362 stateid_t ts_id_stateid;
363 struct list_head ts_id_list;
366 struct nfsd4_test_stateid {
367 u32 ts_num_ids;
368 struct list_head ts_stateid_list;
371 struct nfsd4_free_stateid {
372 stateid_t fr_stateid; /* request */
373 __be32 fr_status; /* response */
376 /* also used for NVERIFY */
377 struct nfsd4_verify {
378 u32 ve_bmval[3]; /* request */
379 u32 ve_attrlen; /* request */
380 char * ve_attrval; /* request */
383 struct nfsd4_write {
384 stateid_t wr_stateid; /* request */
385 u64 wr_offset; /* request */
386 u32 wr_stable_how; /* request */
387 u32 wr_buflen; /* request */
388 struct kvec wr_head;
389 struct page ** wr_pagelist; /* request */
391 u32 wr_bytes_written; /* response */
392 u32 wr_how_written; /* response */
393 nfs4_verifier wr_verifier; /* response */
396 struct nfsd4_exchange_id {
397 nfs4_verifier verifier;
398 struct xdr_netobj clname;
399 u32 flags;
400 clientid_t clientid;
401 u32 seqid;
402 int spa_how;
405 struct nfsd4_sequence {
406 struct nfs4_sessionid sessionid; /* request/response */
407 u32 seqid; /* request/response */
408 u32 slotid; /* request/response */
409 u32 maxslots; /* request/response */
410 u32 cachethis; /* request */
411 #if 0
412 u32 target_maxslots; /* response */
413 #endif /* not yet */
414 u32 status_flags; /* response */
417 struct nfsd4_destroy_session {
418 struct nfs4_sessionid sessionid;
421 struct nfsd4_destroy_clientid {
422 clientid_t clientid;
425 struct nfsd4_reclaim_complete {
426 u32 rca_one_fs;
429 struct nfsd4_op {
430 int opnum;
431 __be32 status;
432 union {
433 struct nfsd4_access access;
434 struct nfsd4_close close;
435 struct nfsd4_commit commit;
436 struct nfsd4_create create;
437 struct nfsd4_delegreturn delegreturn;
438 struct nfsd4_getattr getattr;
439 struct svc_fh * getfh;
440 struct nfsd4_link link;
441 struct nfsd4_lock lock;
442 struct nfsd4_lockt lockt;
443 struct nfsd4_locku locku;
444 struct nfsd4_lookup lookup;
445 struct nfsd4_verify nverify;
446 struct nfsd4_open open;
447 struct nfsd4_open_confirm open_confirm;
448 struct nfsd4_open_downgrade open_downgrade;
449 struct nfsd4_putfh putfh;
450 struct nfsd4_read read;
451 struct nfsd4_readdir readdir;
452 struct nfsd4_readlink readlink;
453 struct nfsd4_remove remove;
454 struct nfsd4_rename rename;
455 clientid_t renew;
456 struct nfsd4_secinfo secinfo;
457 struct nfsd4_setattr setattr;
458 struct nfsd4_setclientid setclientid;
459 struct nfsd4_setclientid_confirm setclientid_confirm;
460 struct nfsd4_verify verify;
461 struct nfsd4_write write;
462 struct nfsd4_release_lockowner release_lockowner;
464 /* NFSv4.1 */
465 struct nfsd4_exchange_id exchange_id;
466 struct nfsd4_backchannel_ctl backchannel_ctl;
467 struct nfsd4_bind_conn_to_session bind_conn_to_session;
468 struct nfsd4_create_session create_session;
469 struct nfsd4_destroy_session destroy_session;
470 struct nfsd4_sequence sequence;
471 struct nfsd4_reclaim_complete reclaim_complete;
472 struct nfsd4_test_stateid test_stateid;
473 struct nfsd4_free_stateid free_stateid;
474 } u;
475 struct nfs4_replay * replay;
478 bool nfsd4_cache_this_op(struct nfsd4_op *);
480 struct nfsd4_compoundargs {
481 /* scratch variables for XDR decode */
482 __be32 * p;
483 __be32 * end;
484 struct page ** pagelist;
485 int pagelen;
486 __be32 tmp[8];
487 __be32 * tmpp;
488 struct tmpbuf {
489 struct tmpbuf *next;
490 void (*release)(const void *);
491 void *buf;
492 } *to_free;
494 struct svc_rqst *rqstp;
496 u32 taglen;
497 char * tag;
498 u32 minorversion;
499 u32 opcnt;
500 struct nfsd4_op *ops;
501 struct nfsd4_op iops[8];
502 int cachetype;
505 struct nfsd4_compoundres {
506 /* scratch variables for XDR encode */
507 __be32 * p;
508 __be32 * end;
509 struct xdr_buf * xbuf;
510 struct svc_rqst * rqstp;
512 u32 taglen;
513 char * tag;
514 u32 opcnt;
515 __be32 * tagp; /* tag, opcount encode location */
516 struct nfsd4_compound_state cstate;
519 static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
521 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
522 return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
525 static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
527 return !(resp->cstate.slot->sl_flags & NFSD4_SLOT_CACHETHIS)
528 || nfsd4_is_solo_sequence(resp);
531 static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
533 struct nfsd4_compoundres *resp = rqstp->rq_resp;
534 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
536 return argp->opcnt == resp->opcnt;
539 #define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs)
541 static inline void
542 set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
544 BUG_ON(!fhp->fh_pre_saved);
545 cinfo->atomic = fhp->fh_post_saved;
546 cinfo->change_supported = IS_I_VERSION(fhp->fh_dentry->d_inode);
548 cinfo->before_change = fhp->fh_pre_change;
549 cinfo->after_change = fhp->fh_post_change;
550 cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
551 cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
552 cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
553 cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;
557 int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *, void *);
558 int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *,
559 struct nfsd4_compoundargs *);
560 int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *,
561 struct nfsd4_compoundres *);
562 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
563 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
564 void nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op);
565 __be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
566 struct dentry *dentry, __be32 **buffer, int countp,
567 u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
568 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
569 struct nfsd4_compound_state *,
570 struct nfsd4_setclientid *setclid);
571 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
572 struct nfsd4_compound_state *,
573 struct nfsd4_setclientid_confirm *setclientid_confirm);
574 extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp);
575 extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
576 struct nfsd4_sequence *seq);
577 extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
578 struct nfsd4_compound_state *, struct nfsd4_exchange_id *);
579 extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_backchannel_ctl *);
580 extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_bind_conn_to_session *);
581 extern __be32 nfsd4_create_session(struct svc_rqst *,
582 struct nfsd4_compound_state *,
583 struct nfsd4_create_session *);
584 extern __be32 nfsd4_sequence(struct svc_rqst *,
585 struct nfsd4_compound_state *,
586 struct nfsd4_sequence *);
587 extern __be32 nfsd4_destroy_session(struct svc_rqst *,
588 struct nfsd4_compound_state *,
589 struct nfsd4_destroy_session *);
590 extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_destroy_clientid *);
591 __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_reclaim_complete *);
592 extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
593 struct nfsd4_open *open, struct nfsd_net *nn);
594 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
595 struct svc_fh *current_fh, struct nfsd4_open *open);
596 extern void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status);
597 extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
598 struct nfsd4_compound_state *, struct nfsd4_open_confirm *oc);
599 extern __be32 nfsd4_close(struct svc_rqst *rqstp,
600 struct nfsd4_compound_state *,
601 struct nfsd4_close *close);
602 extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
603 struct nfsd4_compound_state *,
604 struct nfsd4_open_downgrade *od);
605 extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
606 struct nfsd4_lock *lock);
607 extern __be32 nfsd4_lockt(struct svc_rqst *rqstp,
608 struct nfsd4_compound_state *,
609 struct nfsd4_lockt *lockt);
610 extern __be32 nfsd4_locku(struct svc_rqst *rqstp,
611 struct nfsd4_compound_state *,
612 struct nfsd4_locku *locku);
613 extern __be32
614 nfsd4_release_lockowner(struct svc_rqst *rqstp,
615 struct nfsd4_compound_state *,
616 struct nfsd4_release_lockowner *rlockowner);
617 extern int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp);
618 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
619 struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
620 extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
621 struct nfsd4_compound_state *, clientid_t *clid);
622 extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp,
623 struct nfsd4_compound_state *, struct nfsd4_test_stateid *test_stateid);
624 extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,
625 struct nfsd4_compound_state *, struct nfsd4_free_stateid *free_stateid);
626 extern void nfsd4_bump_seqid(struct nfsd4_compound_state *, __be32 nfserr);
627 #endif
630 * Local variables:
631 * c-basic-offset: 8
632 * End: