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of_serial: remove driver_data direct access of struct device
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4proc.c
blobb2883e9c6381f22b51bc788174d149a20a5e2e54
1 /*
2 * fs/nfsd/nfs4proc.c
3 *
4 * Server-side procedures for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/major.h>
40 #include <linux/slab.h>
41 #include <linux/file.h>
42
43 #include <linux/sunrpc/svc.h>
44 #include <linux/nfsd/nfsd.h>
45 #include <linux/nfsd/cache.h>
46 #include <linux/nfs4.h>
47 #include <linux/nfsd/state.h>
48 #include <linux/nfsd/xdr4.h>
49 #include <linux/nfs4_acl.h>
50 #include <linux/sunrpc/gss_api.h>
51
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
53
54 static inline void
55 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
56 {
57 fh_put(dst);
58 dget(src->fh_dentry);
59 if (src->fh_export)
60 cache_get(&src->fh_export->h);
61 *dst = *src;
62 }
63
64 static __be32
65 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
66 {
67 __be32 status;
68
69 if (open->op_truncate &&
70 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
71 return nfserr_inval;
72
73 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
74 accmode |= NFSD_MAY_READ;
75 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
76 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
77 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
78 accmode |= NFSD_MAY_WRITE;
79
80 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
81
82 return status;
83 }
84
85 static __be32
86 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
87 {
88 struct svc_fh resfh;
89 __be32 status;
90 int created = 0;
91
92 fh_init(&resfh, NFS4_FHSIZE);
93 open->op_truncate = 0;
94
95 if (open->op_create) {
96 /* FIXME: check session persistence and pnfs flags.
97 * The nfsv4.1 spec requires the following semantics:
98 *
99 * Persistent | pNFS | Server REQUIRED | Client Allowed
100 * Reply Cache | server | |
101 * -------------+--------+-----------------+--------------------
102 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
103 * | | | (SHOULD)
104 * | | and EXCLUSIVE4 | or EXCLUSIVE4
105 * | | | (SHOULD NOT)
106 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
107 * yes | no | GUARDED4 | GUARDED4
108 * yes | yes | GUARDED4 | GUARDED4
109 */
110
111 /*
112 * Note: create modes (UNCHECKED,GUARDED...) are the same
113 * in NFSv4 as in v3.
114 */
115 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
116 open->op_fname.len, &open->op_iattr,
117 &resfh, open->op_createmode,
118 (u32 *)open->op_verf.data,
119 &open->op_truncate, &created);
120
121 /*
122 * Following rfc 3530 14.2.16, use the returned bitmask
123 * to indicate which attributes we used to store the
124 * verifier:
125 */
126 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
127 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
128 FATTR4_WORD1_TIME_MODIFY);
129 } else {
130 status = nfsd_lookup(rqstp, current_fh,
131 open->op_fname.data, open->op_fname.len, &resfh);
132 fh_unlock(current_fh);
133 }
134 if (status)
135 goto out;
136
137 set_change_info(&open->op_cinfo, current_fh);
138 fh_dup2(current_fh, &resfh);
139
140 /* set reply cache */
141 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
142 &resfh.fh_handle);
143 if (!created)
144 status = do_open_permission(rqstp, current_fh, open,
145 NFSD_MAY_NOP);
146
147 out:
148 fh_put(&resfh);
149 return status;
150 }
151
152 static __be32
153 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
154 {
155 __be32 status;
156
157 /* Only reclaims from previously confirmed clients are valid */
158 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
159 return status;
160
161 /* We don't know the target directory, and therefore can not
162 * set the change info
163 */
164
165 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
166
167 /* set replay cache */
168 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
169 &current_fh->fh_handle);
170
171 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
172 (open->op_iattr.ia_size == 0);
173
174 status = do_open_permission(rqstp, current_fh, open,
175 NFSD_MAY_OWNER_OVERRIDE);
176
177 return status;
178 }
179
180 static void
181 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
182 {
183 struct nfsd4_sessionid *sid =
184 (struct nfsd4_sessionid *)session->se_sessionid.data;
185
186 clid->cl_boot = sid->clientid.cl_boot;
187 clid->cl_id = sid->clientid.cl_id;
188 }
189
190 static __be32
191 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
192 struct nfsd4_open *open)
193 {
194 __be32 status;
195 struct nfsd4_compoundres *resp;
196
197 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
198 (int)open->op_fname.len, open->op_fname.data,
199 open->op_stateowner);
200
201 /* This check required by spec. */
202 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
203 return nfserr_inval;
204
205 if (nfsd4_has_session(cstate))
206 copy_clientid(&open->op_clientid, cstate->session);
207
208 nfs4_lock_state();
209
210 /* check seqid for replay. set nfs4_owner */
211 resp = rqstp->rq_resp;
212 status = nfsd4_process_open1(&resp->cstate, open);
213 if (status == nfserr_replay_me) {
214 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
215 fh_put(&cstate->current_fh);
216 fh_copy_shallow(&cstate->current_fh.fh_handle,
217 &rp->rp_openfh);
218 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
219 if (status)
220 dprintk("nfsd4_open: replay failed"
221 " restoring previous filehandle\n");
222 else
223 status = nfserr_replay_me;
224 }
225 if (status)
226 goto out;
227
228 /* Openowner is now set, so sequence id will get bumped. Now we need
229 * these checks before we do any creates: */
230 status = nfserr_grace;
231 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
232 goto out;
233 status = nfserr_no_grace;
234 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
235 goto out;
236
237 switch (open->op_claim_type) {
238 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
239 case NFS4_OPEN_CLAIM_NULL:
240 /*
241 * (1) set CURRENT_FH to the file being opened,
242 * creating it if necessary, (2) set open->op_cinfo,
243 * (3) set open->op_truncate if the file is to be
244 * truncated after opening, (4) do permission checking.
245 */
246 status = do_open_lookup(rqstp, &cstate->current_fh,
247 open);
248 if (status)
249 goto out;
250 break;
251 case NFS4_OPEN_CLAIM_PREVIOUS:
252 open->op_stateowner->so_confirmed = 1;
253 /*
254 * The CURRENT_FH is already set to the file being
255 * opened. (1) set open->op_cinfo, (2) set
256 * open->op_truncate if the file is to be truncated
257 * after opening, (3) do permission checking.
258 */
259 status = do_open_fhandle(rqstp, &cstate->current_fh,
260 open);
261 if (status)
262 goto out;
263 break;
264 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
265 open->op_stateowner->so_confirmed = 1;
266 dprintk("NFSD: unsupported OPEN claim type %d\n",
267 open->op_claim_type);
268 status = nfserr_notsupp;
269 goto out;
270 default:
271 dprintk("NFSD: Invalid OPEN claim type %d\n",
272 open->op_claim_type);
273 status = nfserr_inval;
274 goto out;
275 }
276 /*
277 * nfsd4_process_open2() does the actual opening of the file. If
278 * successful, it (1) truncates the file if open->op_truncate was
279 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
280 */
281 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
282 out:
283 if (open->op_stateowner) {
284 nfs4_get_stateowner(open->op_stateowner);
285 cstate->replay_owner = open->op_stateowner;
286 }
287 nfs4_unlock_state();
288 return status;
289 }
290
291 /*
292 * filehandle-manipulating ops.
293 */
294 static __be32
295 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
296 struct svc_fh **getfh)
297 {
298 if (!cstate->current_fh.fh_dentry)
299 return nfserr_nofilehandle;
300
301 *getfh = &cstate->current_fh;
302 return nfs_ok;
303 }
304
305 static __be32
306 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
307 struct nfsd4_putfh *putfh)
308 {
309 fh_put(&cstate->current_fh);
310 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
311 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
312 putfh->pf_fhlen);
313 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
314 }
315
316 static __be32
317 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
318 void *arg)
319 {
320 __be32 status;
321
322 fh_put(&cstate->current_fh);
323 status = exp_pseudoroot(rqstp, &cstate->current_fh);
324 return status;
325 }
326
327 static __be32
328 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
329 void *arg)
330 {
331 if (!cstate->save_fh.fh_dentry)
332 return nfserr_restorefh;
333
334 fh_dup2(&cstate->current_fh, &cstate->save_fh);
335 return nfs_ok;
336 }
337
338 static __be32
339 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
340 void *arg)
341 {
342 if (!cstate->current_fh.fh_dentry)
343 return nfserr_nofilehandle;
344
345 fh_dup2(&cstate->save_fh, &cstate->current_fh);
346 return nfs_ok;
347 }
348
349 /*
350 * misc nfsv4 ops
351 */
352 static __be32
353 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
354 struct nfsd4_access *access)
355 {
356 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
357 return nfserr_inval;
358
359 access->ac_resp_access = access->ac_req_access;
360 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
361 &access->ac_supported);
362 }
363
364 static __be32
365 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
366 struct nfsd4_commit *commit)
367 {
368 __be32 status;
369
370 u32 *p = (u32 *)commit->co_verf.data;
371 *p++ = nfssvc_boot.tv_sec;
372 *p++ = nfssvc_boot.tv_usec;
373
374 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
375 commit->co_count);
376 if (status == nfserr_symlink)
377 status = nfserr_inval;
378 return status;
379 }
380
381 static __be32
382 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
383 struct nfsd4_create *create)
384 {
385 struct svc_fh resfh;
386 __be32 status;
387 dev_t rdev;
388
389 fh_init(&resfh, NFS4_FHSIZE);
390
391 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
392 NFSD_MAY_CREATE);
393 if (status == nfserr_symlink)
394 status = nfserr_notdir;
395 if (status)
396 return status;
397
398 switch (create->cr_type) {
399 case NF4LNK:
400 /* ugh! we have to null-terminate the linktext, or
401 * vfs_symlink() will choke. it is always safe to
402 * null-terminate by brute force, since at worst we
403 * will overwrite the first byte of the create namelen
404 * in the XDR buffer, which has already been extracted
405 * during XDR decode.
406 */
407 create->cr_linkname[create->cr_linklen] = 0;
408
409 status = nfsd_symlink(rqstp, &cstate->current_fh,
410 create->cr_name, create->cr_namelen,
411 create->cr_linkname, create->cr_linklen,
412 &resfh, &create->cr_iattr);
413 break;
414
415 case NF4BLK:
416 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
417 if (MAJOR(rdev) != create->cr_specdata1 ||
418 MINOR(rdev) != create->cr_specdata2)
419 return nfserr_inval;
420 status = nfsd_create(rqstp, &cstate->current_fh,
421 create->cr_name, create->cr_namelen,
422 &create->cr_iattr, S_IFBLK, rdev, &resfh);
423 break;
424
425 case NF4CHR:
426 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
427 if (MAJOR(rdev) != create->cr_specdata1 ||
428 MINOR(rdev) != create->cr_specdata2)
429 return nfserr_inval;
430 status = nfsd_create(rqstp, &cstate->current_fh,
431 create->cr_name, create->cr_namelen,
432 &create->cr_iattr,S_IFCHR, rdev, &resfh);
433 break;
434
435 case NF4SOCK:
436 status = nfsd_create(rqstp, &cstate->current_fh,
437 create->cr_name, create->cr_namelen,
438 &create->cr_iattr, S_IFSOCK, 0, &resfh);
439 break;
440
441 case NF4FIFO:
442 status = nfsd_create(rqstp, &cstate->current_fh,
443 create->cr_name, create->cr_namelen,
444 &create->cr_iattr, S_IFIFO, 0, &resfh);
445 break;
446
447 case NF4DIR:
448 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
449 status = nfsd_create(rqstp, &cstate->current_fh,
450 create->cr_name, create->cr_namelen,
451 &create->cr_iattr, S_IFDIR, 0, &resfh);
452 break;
453
454 default:
455 status = nfserr_badtype;
456 }
457
458 if (!status) {
459 fh_unlock(&cstate->current_fh);
460 set_change_info(&create->cr_cinfo, &cstate->current_fh);
461 fh_dup2(&cstate->current_fh, &resfh);
462 }
463
464 fh_put(&resfh);
465 return status;
466 }
467
468 static __be32
469 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
470 struct nfsd4_getattr *getattr)
471 {
472 __be32 status;
473
474 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
475 if (status)
476 return status;
477
478 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
479 return nfserr_inval;
480
481 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
482 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
483 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
484
485 getattr->ga_fhp = &cstate->current_fh;
486 return nfs_ok;
487 }
488
489 static __be32
490 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
491 struct nfsd4_link *link)
492 {
493 __be32 status = nfserr_nofilehandle;
494
495 if (!cstate->save_fh.fh_dentry)
496 return status;
497 status = nfsd_link(rqstp, &cstate->current_fh,
498 link->li_name, link->li_namelen, &cstate->save_fh);
499 if (!status)
500 set_change_info(&link->li_cinfo, &cstate->current_fh);
501 return status;
502 }
503
504 static __be32
505 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
506 void *arg)
507 {
508 struct svc_fh tmp_fh;
509 __be32 ret;
510
511 fh_init(&tmp_fh, NFS4_FHSIZE);
512 ret = exp_pseudoroot(rqstp, &tmp_fh);
513 if (ret)
514 return ret;
515 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
516 fh_put(&tmp_fh);
517 return nfserr_noent;
518 }
519 fh_put(&tmp_fh);
520 return nfsd_lookup(rqstp, &cstate->current_fh,
521 "..", 2, &cstate->current_fh);
522 }
523
524 static __be32
525 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
526 struct nfsd4_lookup *lookup)
527 {
528 return nfsd_lookup(rqstp, &cstate->current_fh,
529 lookup->lo_name, lookup->lo_len,
530 &cstate->current_fh);
531 }
532
533 static __be32
534 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
535 struct nfsd4_read *read)
536 {
537 __be32 status;
538
539 /* no need to check permission - this will be done in nfsd_read() */
540
541 read->rd_filp = NULL;
542 if (read->rd_offset >= OFFSET_MAX)
543 return nfserr_inval;
544
545 nfs4_lock_state();
546 /* check stateid */
547 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
548 RD_STATE, &read->rd_filp))) {
549 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
550 goto out;
551 }
552 if (read->rd_filp)
553 get_file(read->rd_filp);
554 status = nfs_ok;
555 out:
556 nfs4_unlock_state();
557 read->rd_rqstp = rqstp;
558 read->rd_fhp = &cstate->current_fh;
559 return status;
560 }
561
562 static __be32
563 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
564 struct nfsd4_readdir *readdir)
565 {
566 u64 cookie = readdir->rd_cookie;
567 static const nfs4_verifier zeroverf;
568
569 /* no need to check permission - this will be done in nfsd_readdir() */
570
571 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
572 return nfserr_inval;
573
574 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
575 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
576 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
577
578 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
579 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
580 return nfserr_bad_cookie;
581
582 readdir->rd_rqstp = rqstp;
583 readdir->rd_fhp = &cstate->current_fh;
584 return nfs_ok;
585 }
586
587 static __be32
588 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
589 struct nfsd4_readlink *readlink)
590 {
591 readlink->rl_rqstp = rqstp;
592 readlink->rl_fhp = &cstate->current_fh;
593 return nfs_ok;
594 }
595
596 static __be32
597 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
598 struct nfsd4_remove *remove)
599 {
600 __be32 status;
601
602 if (locks_in_grace())
603 return nfserr_grace;
604 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
605 remove->rm_name, remove->rm_namelen);
606 if (status == nfserr_symlink)
607 return nfserr_notdir;
608 if (!status) {
609 fh_unlock(&cstate->current_fh);
610 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
611 }
612 return status;
613 }
614
615 static __be32
616 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
617 struct nfsd4_rename *rename)
618 {
619 __be32 status = nfserr_nofilehandle;
620
621 if (!cstate->save_fh.fh_dentry)
622 return status;
623 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
624 & NFSEXP_NOSUBTREECHECK))
625 return nfserr_grace;
626 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
627 rename->rn_snamelen, &cstate->current_fh,
628 rename->rn_tname, rename->rn_tnamelen);
629
630 /* the underlying filesystem returns different error's than required
631 * by NFSv4. both save_fh and current_fh have been verified.. */
632 if (status == nfserr_isdir)
633 status = nfserr_exist;
634 else if ((status == nfserr_notdir) &&
635 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
636 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
637 status = nfserr_exist;
638 else if (status == nfserr_symlink)
639 status = nfserr_notdir;
640
641 if (!status) {
642 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
643 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
644 }
645 return status;
646 }
647
648 static __be32
649 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
650 struct nfsd4_secinfo *secinfo)
651 {
652 struct svc_fh resfh;
653 struct svc_export *exp;
654 struct dentry *dentry;
655 __be32 err;
656
657 fh_init(&resfh, NFS4_FHSIZE);
658 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
659 secinfo->si_name, secinfo->si_namelen,
660 &exp, &dentry);
661 if (err)
662 return err;
663 if (dentry->d_inode == NULL) {
664 exp_put(exp);
665 err = nfserr_noent;
666 } else
667 secinfo->si_exp = exp;
668 dput(dentry);
669 return err;
670 }
671
672 static __be32
673 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
674 struct nfsd4_setattr *setattr)
675 {
676 __be32 status = nfs_ok;
677
678 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
679 nfs4_lock_state();
680 status = nfs4_preprocess_stateid_op(cstate,
681 &setattr->sa_stateid, WR_STATE, NULL);
682 nfs4_unlock_state();
683 if (status) {
684 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
685 return status;
686 }
687 }
688 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
689 if (status)
690 return status;
691 status = nfs_ok;
692 if (setattr->sa_acl != NULL)
693 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
694 setattr->sa_acl);
695 if (status)
696 goto out;
697 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
698 0, (time_t)0);
699 out:
700 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
701 return status;
702 }
703
704 static __be32
705 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
706 struct nfsd4_write *write)
707 {
708 stateid_t *stateid = &write->wr_stateid;
709 struct file *filp = NULL;
710 u32 *p;
711 __be32 status = nfs_ok;
712 unsigned long cnt;
713
714 /* no need to check permission - this will be done in nfsd_write() */
715
716 if (write->wr_offset >= OFFSET_MAX)
717 return nfserr_inval;
718
719 nfs4_lock_state();
720 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
721 if (filp)
722 get_file(filp);
723 nfs4_unlock_state();
724
725 if (status) {
726 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
727 return status;
728 }
729
730 cnt = write->wr_buflen;
731 write->wr_how_written = write->wr_stable_how;
732 p = (u32 *)write->wr_verifier.data;
733 *p++ = nfssvc_boot.tv_sec;
734 *p++ = nfssvc_boot.tv_usec;
735
736 status = nfsd_write(rqstp, &cstate->current_fh, filp,
737 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
738 &cnt, &write->wr_how_written);
739 if (filp)
740 fput(filp);
741
742 write->wr_bytes_written = cnt;
743
744 if (status == nfserr_symlink)
745 status = nfserr_inval;
746 return status;
747 }
748
749 /* This routine never returns NFS_OK! If there are no other errors, it
750 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
751 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
752 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
753 */
754 static __be32
755 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
756 struct nfsd4_verify *verify)
757 {
758 __be32 *buf, *p;
759 int count;
760 __be32 status;
761
762 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
763 if (status)
764 return status;
765
766 if ((verify->ve_bmval[0] & ~nfsd_suppattrs0(cstate->minorversion))
767 || (verify->ve_bmval[1] & ~nfsd_suppattrs1(cstate->minorversion))
768 || (verify->ve_bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
769 return nfserr_attrnotsupp;
770 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
771 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
772 return nfserr_inval;
773 if (verify->ve_attrlen & 3)
774 return nfserr_inval;
775
776 /* count in words:
777 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
778 */
779 count = 4 + (verify->ve_attrlen >> 2);
780 buf = kmalloc(count << 2, GFP_KERNEL);
781 if (!buf)
782 return nfserr_resource;
783
784 status = nfsd4_encode_fattr(&cstate->current_fh,
785 cstate->current_fh.fh_export,
786 cstate->current_fh.fh_dentry, buf,
787 &count, verify->ve_bmval,
788 rqstp, 0);
789
790 /* this means that nfsd4_encode_fattr() ran out of space */
791 if (status == nfserr_resource && count == 0)
792 status = nfserr_not_same;
793 if (status)
794 goto out_kfree;
795
796 /* skip bitmap */
797 p = buf + 1 + ntohl(buf[0]);
798 status = nfserr_not_same;
799 if (ntohl(*p++) != verify->ve_attrlen)
800 goto out_kfree;
801 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
802 status = nfserr_same;
803
804 out_kfree:
805 kfree(buf);
806 return status;
807 }
808
809 static __be32
810 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
811 struct nfsd4_verify *verify)
812 {
813 __be32 status;
814
815 status = _nfsd4_verify(rqstp, cstate, verify);
816 return status == nfserr_not_same ? nfs_ok : status;
817 }
818
819 static __be32
820 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
821 struct nfsd4_verify *verify)
822 {
823 __be32 status;
824
825 status = _nfsd4_verify(rqstp, cstate, verify);
826 return status == nfserr_same ? nfs_ok : status;
827 }
828
829 /*
830 * NULL call.
831 */
832 static __be32
833 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
834 {
835 return nfs_ok;
836 }
837
838 static inline void nfsd4_increment_op_stats(u32 opnum)
839 {
840 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
841 nfsdstats.nfs4_opcount[opnum]++;
842 }
843
844 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
845 void *);
846 enum nfsd4_op_flags {
847 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
848 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */
849 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */
850 };
851
852 struct nfsd4_operation {
853 nfsd4op_func op_func;
854 u32 op_flags;
855 char *op_name;
856 };
857
858 static struct nfsd4_operation nfsd4_ops[];
859
860 static const char *nfsd4_op_name(unsigned opnum);
861
862 /*
863 * This is a replay of a compound for which no cache entry pages
864 * were used. Encode the sequence operation, and if cachethis is FALSE
865 * encode the uncache rep error on the next operation.
866 */
867 static __be32
868 nfsd4_enc_uncached_replay(struct nfsd4_compoundargs *args,
869 struct nfsd4_compoundres *resp)
870 {
871 struct nfsd4_op *op;
872
873 dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__,
874 resp->opcnt, resp->cstate.slot->sl_cache_entry.ce_cachethis);
875
876 /* Encode the replayed sequence operation */
877 BUG_ON(resp->opcnt != 1);
878 op = &args->ops[resp->opcnt - 1];
879 nfsd4_encode_operation(resp, op);
880
881 /*return nfserr_retry_uncached_rep in next operation. */
882 if (resp->cstate.slot->sl_cache_entry.ce_cachethis == 0) {
883 op = &args->ops[resp->opcnt++];
884 op->status = nfserr_retry_uncached_rep;
885 nfsd4_encode_operation(resp, op);
886 }
887 return op->status;
888 }
889
890 /*
891 * Enforce NFSv4.1 COMPOUND ordering rules.
892 *
893 * TODO:
894 * - enforce NFS4ERR_NOT_ONLY_OP,
895 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
896 */
897 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
898 {
899 if (args->minorversion && args->opcnt > 0) {
900 struct nfsd4_op *op = &args->ops[0];
901 return (op->status == nfserr_op_illegal) ||
902 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
903 }
904 return true;
905 }
906
907 /*
908 * COMPOUND call.
909 */
910 static __be32
911 nfsd4_proc_compound(struct svc_rqst *rqstp,
912 struct nfsd4_compoundargs *args,
913 struct nfsd4_compoundres *resp)
914 {
915 struct nfsd4_op *op;
916 struct nfsd4_operation *opdesc;
917 struct nfsd4_compound_state *cstate = &resp->cstate;
918 int slack_bytes;
919 __be32 status;
920
921 resp->xbuf = &rqstp->rq_res;
922 resp->p = rqstp->rq_res.head[0].iov_base +
923 rqstp->rq_res.head[0].iov_len;
924 resp->tagp = resp->p;
925 /* reserve space for: taglen, tag, and opcnt */
926 resp->p += 2 + XDR_QUADLEN(args->taglen);
927 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
928 resp->taglen = args->taglen;
929 resp->tag = args->tag;
930 resp->opcnt = 0;
931 resp->rqstp = rqstp;
932 resp->cstate.minorversion = args->minorversion;
933 resp->cstate.replay_owner = NULL;
934 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
935 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
936 /* Use the deferral mechanism only for NFSv4.0 compounds */
937 rqstp->rq_usedeferral = (args->minorversion == 0);
938
939 /*
940 * According to RFC3010, this takes precedence over all other errors.
941 */
942 status = nfserr_minor_vers_mismatch;
943 if (args->minorversion > nfsd_supported_minorversion)
944 goto out;
945
946 if (!nfs41_op_ordering_ok(args)) {
947 op = &args->ops[0];
948 op->status = nfserr_sequence_pos;
949 goto encode_op;
950 }
951
952 status = nfs_ok;
953 while (!status && resp->opcnt < args->opcnt) {
954 op = &args->ops[resp->opcnt++];
955
956 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
957 resp->opcnt, args->opcnt, op->opnum,
958 nfsd4_op_name(op->opnum));
959 /*
960 * The XDR decode routines may have pre-set op->status;
961 * for example, if there is a miscellaneous XDR error
962 * it will be set to nfserr_bad_xdr.
963 */
964 if (op->status)
965 goto encode_op;
966
967 /* We must be able to encode a successful response to
968 * this operation, with enough room left over to encode a
969 * failed response to the next operation. If we don't
970 * have enough room, fail with ERR_RESOURCE.
971 */
972 slack_bytes = (char *)resp->end - (char *)resp->p;
973 if (slack_bytes < COMPOUND_SLACK_SPACE
974 + COMPOUND_ERR_SLACK_SPACE) {
975 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
976 op->status = nfserr_resource;
977 goto encode_op;
978 }
979
980 opdesc = &nfsd4_ops[op->opnum];
981
982 if (!cstate->current_fh.fh_dentry) {
983 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
984 op->status = nfserr_nofilehandle;
985 goto encode_op;
986 }
987 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
988 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
989 op->status = nfserr_moved;
990 goto encode_op;
991 }
992
993 if (opdesc->op_func)
994 op->status = opdesc->op_func(rqstp, cstate, &op->u);
995 else
996 BUG_ON(op->status == nfs_ok);
997
998 encode_op:
999 /* Only from SEQUENCE or CREATE_SESSION */
1000 if (resp->cstate.status == nfserr_replay_cache) {
1001 dprintk("%s NFS4.1 replay from cache\n", __func__);
1002 if (nfsd4_not_cached(resp))
1003 status = nfsd4_enc_uncached_replay(args, resp);
1004 else
1005 status = op->status;
1006 goto out;
1007 }
1008 if (op->status == nfserr_replay_me) {
1009 op->replay = &cstate->replay_owner->so_replay;
1010 nfsd4_encode_replay(resp, op);
1011 status = op->status = op->replay->rp_status;
1012 } else {
1013 nfsd4_encode_operation(resp, op);
1014 status = op->status;
1015 }
1016
1017 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1018 args->ops, args->opcnt, resp->opcnt, op->opnum,
1019 be32_to_cpu(status));
1020
1021 if (cstate->replay_owner) {
1022 nfs4_put_stateowner(cstate->replay_owner);
1023 cstate->replay_owner = NULL;
1024 }
1025 /* XXX Ugh, we need to get rid of this kind of special case: */
1026 if (op->opnum == OP_READ && op->u.read.rd_filp)
1027 fput(op->u.read.rd_filp);
1028
1029 nfsd4_increment_op_stats(op->opnum);
1030 }
1031 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1032 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1033 status = nfserr_jukebox;
1034 }
1035
1036 resp->cstate.status = status;
1037 fh_put(&resp->cstate.current_fh);
1038 fh_put(&resp->cstate.save_fh);
1039 BUG_ON(resp->cstate.replay_owner);
1040 out:
1041 nfsd4_release_compoundargs(args);
1042 /* Reset deferral mechanism for RPC deferrals */
1043 rqstp->rq_usedeferral = 1;
1044 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1045 return status;
1046 }
1047
1048 static struct nfsd4_operation nfsd4_ops[] = {
1049 [OP_ACCESS] = {
1050 .op_func = (nfsd4op_func)nfsd4_access,
1051 .op_name = "OP_ACCESS",
1052 },
1053 [OP_CLOSE] = {
1054 .op_func = (nfsd4op_func)nfsd4_close,
1055 .op_name = "OP_CLOSE",
1056 },
1057 [OP_COMMIT] = {
1058 .op_func = (nfsd4op_func)nfsd4_commit,
1059 .op_name = "OP_COMMIT",
1060 },
1061 [OP_CREATE] = {
1062 .op_func = (nfsd4op_func)nfsd4_create,
1063 .op_name = "OP_CREATE",
1064 },
1065 [OP_DELEGRETURN] = {
1066 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1067 .op_name = "OP_DELEGRETURN",
1068 },
1069 [OP_GETATTR] = {
1070 .op_func = (nfsd4op_func)nfsd4_getattr,
1071 .op_flags = ALLOWED_ON_ABSENT_FS,
1072 .op_name = "OP_GETATTR",
1073 },
1074 [OP_GETFH] = {
1075 .op_func = (nfsd4op_func)nfsd4_getfh,
1076 .op_name = "OP_GETFH",
1077 },
1078 [OP_LINK] = {
1079 .op_func = (nfsd4op_func)nfsd4_link,
1080 .op_name = "OP_LINK",
1081 },
1082 [OP_LOCK] = {
1083 .op_func = (nfsd4op_func)nfsd4_lock,
1084 .op_name = "OP_LOCK",
1085 },
1086 [OP_LOCKT] = {
1087 .op_func = (nfsd4op_func)nfsd4_lockt,
1088 .op_name = "OP_LOCKT",
1089 },
1090 [OP_LOCKU] = {
1091 .op_func = (nfsd4op_func)nfsd4_locku,
1092 .op_name = "OP_LOCKU",
1093 },
1094 [OP_LOOKUP] = {
1095 .op_func = (nfsd4op_func)nfsd4_lookup,
1096 .op_name = "OP_LOOKUP",
1097 },
1098 [OP_LOOKUPP] = {
1099 .op_func = (nfsd4op_func)nfsd4_lookupp,
1100 .op_name = "OP_LOOKUPP",
1101 },
1102 [OP_NVERIFY] = {
1103 .op_func = (nfsd4op_func)nfsd4_nverify,
1104 .op_name = "OP_NVERIFY",
1105 },
1106 [OP_OPEN] = {
1107 .op_func = (nfsd4op_func)nfsd4_open,
1108 .op_name = "OP_OPEN",
1109 },
1110 [OP_OPEN_CONFIRM] = {
1111 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1112 .op_name = "OP_OPEN_CONFIRM",
1113 },
1114 [OP_OPEN_DOWNGRADE] = {
1115 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1116 .op_name = "OP_OPEN_DOWNGRADE",
1117 },
1118 [OP_PUTFH] = {
1119 .op_func = (nfsd4op_func)nfsd4_putfh,
1120 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1121 .op_name = "OP_PUTFH",
1122 },
1123 [OP_PUTPUBFH] = {
1124 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1125 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1126 .op_name = "OP_PUTPUBFH",
1127 },
1128 [OP_PUTROOTFH] = {
1129 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1130 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1131 .op_name = "OP_PUTROOTFH",
1132 },
1133 [OP_READ] = {
1134 .op_func = (nfsd4op_func)nfsd4_read,
1135 .op_name = "OP_READ",
1136 },
1137 [OP_READDIR] = {
1138 .op_func = (nfsd4op_func)nfsd4_readdir,
1139 .op_name = "OP_READDIR",
1140 },
1141 [OP_READLINK] = {
1142 .op_func = (nfsd4op_func)nfsd4_readlink,
1143 .op_name = "OP_READLINK",
1144 },
1145 [OP_REMOVE] = {
1146 .op_func = (nfsd4op_func)nfsd4_remove,
1147 .op_name = "OP_REMOVE",
1148 },
1149 [OP_RENAME] = {
1150 .op_name = "OP_RENAME",
1151 .op_func = (nfsd4op_func)nfsd4_rename,
1152 },
1153 [OP_RENEW] = {
1154 .op_func = (nfsd4op_func)nfsd4_renew,
1155 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1156 .op_name = "OP_RENEW",
1157 },
1158 [OP_RESTOREFH] = {
1159 .op_func = (nfsd4op_func)nfsd4_restorefh,
1160 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1161 .op_name = "OP_RESTOREFH",
1162 },
1163 [OP_SAVEFH] = {
1164 .op_func = (nfsd4op_func)nfsd4_savefh,
1165 .op_name = "OP_SAVEFH",
1166 },
1167 [OP_SECINFO] = {
1168 .op_func = (nfsd4op_func)nfsd4_secinfo,
1169 .op_name = "OP_SECINFO",
1170 },
1171 [OP_SETATTR] = {
1172 .op_func = (nfsd4op_func)nfsd4_setattr,
1173 .op_name = "OP_SETATTR",
1174 },
1175 [OP_SETCLIENTID] = {
1176 .op_func = (nfsd4op_func)nfsd4_setclientid,
1177 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1178 .op_name = "OP_SETCLIENTID",
1179 },
1180 [OP_SETCLIENTID_CONFIRM] = {
1181 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1182 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1183 .op_name = "OP_SETCLIENTID_CONFIRM",
1184 },
1185 [OP_VERIFY] = {
1186 .op_func = (nfsd4op_func)nfsd4_verify,
1187 .op_name = "OP_VERIFY",
1188 },
1189 [OP_WRITE] = {
1190 .op_func = (nfsd4op_func)nfsd4_write,
1191 .op_name = "OP_WRITE",
1192 },
1193 [OP_RELEASE_LOCKOWNER] = {
1194 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1195 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1196 .op_name = "OP_RELEASE_LOCKOWNER",
1197 },
1198
1199 /* NFSv4.1 operations */
1200 [OP_EXCHANGE_ID] = {
1201 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1202 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1203 .op_name = "OP_EXCHANGE_ID",
1204 },
1205 [OP_CREATE_SESSION] = {
1206 .op_func = (nfsd4op_func)nfsd4_create_session,
1207 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1208 .op_name = "OP_CREATE_SESSION",
1209 },
1210 [OP_DESTROY_SESSION] = {
1211 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1212 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1213 .op_name = "OP_DESTROY_SESSION",
1214 },
1215 [OP_SEQUENCE] = {
1216 .op_func = (nfsd4op_func)nfsd4_sequence,
1217 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1218 .op_name = "OP_SEQUENCE",
1219 },
1220 };
1221
1222 static const char *nfsd4_op_name(unsigned opnum)
1223 {
1224 if (opnum < ARRAY_SIZE(nfsd4_ops))
1225 return nfsd4_ops[opnum].op_name;
1226 return "unknown_operation";
1227 }
1228
1229 #define nfs4svc_decode_voidargs NULL
1230 #define nfs4svc_release_void NULL
1231 #define nfsd4_voidres nfsd4_voidargs
1232 #define nfs4svc_release_compound NULL
1233 struct nfsd4_voidargs { int dummy; };
1234
1235 #define PROC(name, argt, rest, relt, cache, respsize) \
1236 { (svc_procfunc) nfsd4_proc_##name, \
1237 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1238 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1239 (kxdrproc_t) nfs4svc_release_##relt, \
1240 sizeof(struct nfsd4_##argt##args), \
1241 sizeof(struct nfsd4_##rest##res), \
1242 0, \
1243 cache, \
1244 respsize, \
1245 }
1246
1247 /*
1248 * TODO: At the present time, the NFSv4 server does not do XID caching
1249 * of requests. Implementing XID caching would not be a serious problem,
1250 * although it would require a mild change in interfaces since one
1251 * doesn't know whether an NFSv4 request is idempotent until after the
1252 * XDR decode. However, XID caching totally confuses pynfs (Peter
1253 * Astrand's regression testsuite for NFSv4 servers), which reuses
1254 * XID's liberally, so I've left it unimplemented until pynfs generates
1255 * better XID's.
1256 */
1257 static struct svc_procedure nfsd_procedures4[2] = {
1258 PROC(null, void, void, void, RC_NOCACHE, 1),
1259 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
1260 };
1261
1262 struct svc_version nfsd_version4 = {
1263 .vs_vers = 4,
1264 .vs_nproc = 2,
1265 .vs_proc = nfsd_procedures4,
1266 .vs_dispatch = nfsd_dispatch,
1267 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1268 };
1269
1270 /*
1271 * Local variables:
1272 * c-basic-offset: 8
1273 * End:
1274 */
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