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mmc: sdhci: Check mrq->cmd in sdhci_tasklet_finish
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4proc.c
blob3db35a46f01f71c19e05f96c3cd0066dc0f02142
1 /*
2 * Server-side procedures 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 #include <linux/file.h>
36
37 #include "cache.h"
38 #include "xdr4.h"
39 #include "vfs.h"
40
41 #define NFSDDBG_FACILITY NFSDDBG_PROC
42
43 static u32 nfsd_attrmask[] = {
44 NFSD_WRITEABLE_ATTRS_WORD0,
45 NFSD_WRITEABLE_ATTRS_WORD1,
46 NFSD_WRITEABLE_ATTRS_WORD2
47 };
48
49 static u32 nfsd41_ex_attrmask[] = {
50 NFSD_SUPPATTR_EXCLCREAT_WORD0,
51 NFSD_SUPPATTR_EXCLCREAT_WORD1,
52 NFSD_SUPPATTR_EXCLCREAT_WORD2
53 };
54
55 static __be32
56 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
57 u32 *bmval, u32 *writable)
58 {
59 struct dentry *dentry = cstate->current_fh.fh_dentry;
60
61 /*
62 * Check about attributes are supported by the NFSv4 server or not.
63 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
64 */
65 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
66 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
67 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
68 return nfserr_attrnotsupp;
69
70 /*
71 * Check FATTR4_WORD0_ACL can be supported
72 * in current environment or not.
73 */
74 if (bmval[0] & FATTR4_WORD0_ACL) {
75 if (!IS_POSIXACL(dentry->d_inode))
76 return nfserr_attrnotsupp;
77 }
78
79 /*
80 * According to spec, read-only attributes return ERR_INVAL.
81 */
82 if (writable) {
83 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
84 (bmval[2] & ~writable[2]))
85 return nfserr_inval;
86 }
87
88 return nfs_ok;
89 }
90
91 static __be32
92 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
93 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
94 {
95 __be32 status = nfs_ok;
96
97 if (open->op_create == NFS4_OPEN_CREATE) {
98 if (open->op_createmode == NFS4_CREATE_UNCHECKED
99 || open->op_createmode == NFS4_CREATE_GUARDED)
100 status = check_attr_support(rqstp, cstate,
101 open->op_bmval, nfsd_attrmask);
102 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
103 status = check_attr_support(rqstp, cstate,
104 open->op_bmval, nfsd41_ex_attrmask);
105 }
106
107 return status;
108 }
109
110 static int
111 is_create_with_attrs(struct nfsd4_open *open)
112 {
113 return open->op_create == NFS4_OPEN_CREATE
114 && (open->op_createmode == NFS4_CREATE_UNCHECKED
115 || open->op_createmode == NFS4_CREATE_GUARDED
116 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
117 }
118
119 /*
120 * if error occurs when setting the acl, just clear the acl bit
121 * in the returned attr bitmap.
122 */
123 static void
124 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
125 struct nfs4_acl *acl, u32 *bmval)
126 {
127 __be32 status;
128
129 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
130 if (status)
131 /*
132 * We should probably fail the whole open at this point,
133 * but we've already created the file, so it's too late;
134 * So this seems the least of evils:
135 */
136 bmval[0] &= ~FATTR4_WORD0_ACL;
137 }
138
139 static inline void
140 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
141 {
142 fh_put(dst);
143 dget(src->fh_dentry);
144 if (src->fh_export)
145 cache_get(&src->fh_export->h);
146 *dst = *src;
147 }
148
149 static __be32
150 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
151 {
152 __be32 status;
153
154 if (open->op_truncate &&
155 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
156 return nfserr_inval;
157
158 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
159 accmode |= NFSD_MAY_READ;
160 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
161 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
162 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
163 accmode |= NFSD_MAY_WRITE;
164
165 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
166
167 return status;
168 }
169
170 static __be32
171 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
172 {
173 struct svc_fh resfh;
174 __be32 status;
175 int created = 0;
176
177 fh_init(&resfh, NFS4_FHSIZE);
178 open->op_truncate = 0;
179
180 if (open->op_create) {
181 /* FIXME: check session persistence and pnfs flags.
182 * The nfsv4.1 spec requires the following semantics:
183 *
184 * Persistent | pNFS | Server REQUIRED | Client Allowed
185 * Reply Cache | server | |
186 * -------------+--------+-----------------+--------------------
187 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
188 * | | | (SHOULD)
189 * | | and EXCLUSIVE4 | or EXCLUSIVE4
190 * | | | (SHOULD NOT)
191 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
192 * yes | no | GUARDED4 | GUARDED4
193 * yes | yes | GUARDED4 | GUARDED4
194 */
195
196 /*
197 * Note: create modes (UNCHECKED,GUARDED...) are the same
198 * in NFSv4 as in v3.
199 */
200 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
201 open->op_fname.len, &open->op_iattr,
202 &resfh, open->op_createmode,
203 (u32 *)open->op_verf.data,
204 &open->op_truncate, &created);
205
206 /*
207 * Following rfc 3530 14.2.16, use the returned bitmask
208 * to indicate which attributes we used to store the
209 * verifier:
210 */
211 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
212 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
213 FATTR4_WORD1_TIME_MODIFY);
214 } else {
215 status = nfsd_lookup(rqstp, current_fh,
216 open->op_fname.data, open->op_fname.len, &resfh);
217 fh_unlock(current_fh);
218 }
219 if (status)
220 goto out;
221
222 if (is_create_with_attrs(open) && open->op_acl != NULL)
223 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
224
225 set_change_info(&open->op_cinfo, current_fh);
226 fh_dup2(current_fh, &resfh);
227
228 /* set reply cache */
229 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
230 &resfh.fh_handle);
231 if (!created)
232 status = do_open_permission(rqstp, current_fh, open,
233 NFSD_MAY_NOP);
234
235 out:
236 fh_put(&resfh);
237 return status;
238 }
239
240 static __be32
241 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
242 {
243 __be32 status;
244
245 /* Only reclaims from previously confirmed clients are valid */
246 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
247 return status;
248
249 /* We don't know the target directory, and therefore can not
250 * set the change info
251 */
252
253 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
254
255 /* set replay cache */
256 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
257 &current_fh->fh_handle);
258
259 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
260 (open->op_iattr.ia_size == 0);
261
262 status = do_open_permission(rqstp, current_fh, open,
263 NFSD_MAY_OWNER_OVERRIDE);
264
265 return status;
266 }
267
268 static void
269 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
270 {
271 struct nfsd4_sessionid *sid =
272 (struct nfsd4_sessionid *)session->se_sessionid.data;
273
274 clid->cl_boot = sid->clientid.cl_boot;
275 clid->cl_id = sid->clientid.cl_id;
276 }
277
278 static __be32
279 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
280 struct nfsd4_open *open)
281 {
282 __be32 status;
283 struct nfsd4_compoundres *resp;
284
285 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
286 (int)open->op_fname.len, open->op_fname.data,
287 open->op_stateowner);
288
289 /* This check required by spec. */
290 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
291 return nfserr_inval;
292
293 if (nfsd4_has_session(cstate))
294 copy_clientid(&open->op_clientid, cstate->session);
295
296 nfs4_lock_state();
297
298 /* check seqid for replay. set nfs4_owner */
299 resp = rqstp->rq_resp;
300 status = nfsd4_process_open1(&resp->cstate, open);
301 if (status == nfserr_replay_me) {
302 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
303 fh_put(&cstate->current_fh);
304 fh_copy_shallow(&cstate->current_fh.fh_handle,
305 &rp->rp_openfh);
306 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
307 if (status)
308 dprintk("nfsd4_open: replay failed"
309 " restoring previous filehandle\n");
310 else
311 status = nfserr_replay_me;
312 }
313 if (status)
314 goto out;
315
316 status = nfsd4_check_open_attributes(rqstp, cstate, open);
317 if (status)
318 goto out;
319
320 /* Openowner is now set, so sequence id will get bumped. Now we need
321 * these checks before we do any creates: */
322 status = nfserr_grace;
323 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
324 goto out;
325 status = nfserr_no_grace;
326 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
327 goto out;
328
329 switch (open->op_claim_type) {
330 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
331 case NFS4_OPEN_CLAIM_NULL:
332 /*
333 * (1) set CURRENT_FH to the file being opened,
334 * creating it if necessary, (2) set open->op_cinfo,
335 * (3) set open->op_truncate if the file is to be
336 * truncated after opening, (4) do permission checking.
337 */
338 status = do_open_lookup(rqstp, &cstate->current_fh,
339 open);
340 if (status)
341 goto out;
342 break;
343 case NFS4_OPEN_CLAIM_PREVIOUS:
344 open->op_stateowner->so_confirmed = 1;
345 /*
346 * The CURRENT_FH is already set to the file being
347 * opened. (1) set open->op_cinfo, (2) set
348 * open->op_truncate if the file is to be truncated
349 * after opening, (3) do permission checking.
350 */
351 status = do_open_fhandle(rqstp, &cstate->current_fh,
352 open);
353 if (status)
354 goto out;
355 break;
356 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
357 open->op_stateowner->so_confirmed = 1;
358 dprintk("NFSD: unsupported OPEN claim type %d\n",
359 open->op_claim_type);
360 status = nfserr_notsupp;
361 goto out;
362 default:
363 dprintk("NFSD: Invalid OPEN claim type %d\n",
364 open->op_claim_type);
365 status = nfserr_inval;
366 goto out;
367 }
368 /*
369 * nfsd4_process_open2() does the actual opening of the file. If
370 * successful, it (1) truncates the file if open->op_truncate was
371 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
372 */
373 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
374 out:
375 if (open->op_stateowner) {
376 nfs4_get_stateowner(open->op_stateowner);
377 cstate->replay_owner = open->op_stateowner;
378 }
379 nfs4_unlock_state();
380 return status;
381 }
382
383 /*
384 * filehandle-manipulating ops.
385 */
386 static __be32
387 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
388 struct svc_fh **getfh)
389 {
390 if (!cstate->current_fh.fh_dentry)
391 return nfserr_nofilehandle;
392
393 *getfh = &cstate->current_fh;
394 return nfs_ok;
395 }
396
397 static __be32
398 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
399 struct nfsd4_putfh *putfh)
400 {
401 fh_put(&cstate->current_fh);
402 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
403 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
404 putfh->pf_fhlen);
405 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
406 }
407
408 static __be32
409 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
410 void *arg)
411 {
412 __be32 status;
413
414 fh_put(&cstate->current_fh);
415 status = exp_pseudoroot(rqstp, &cstate->current_fh);
416 return status;
417 }
418
419 static __be32
420 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
421 void *arg)
422 {
423 if (!cstate->save_fh.fh_dentry)
424 return nfserr_restorefh;
425
426 fh_dup2(&cstate->current_fh, &cstate->save_fh);
427 return nfs_ok;
428 }
429
430 static __be32
431 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
432 void *arg)
433 {
434 if (!cstate->current_fh.fh_dentry)
435 return nfserr_nofilehandle;
436
437 fh_dup2(&cstate->save_fh, &cstate->current_fh);
438 return nfs_ok;
439 }
440
441 /*
442 * misc nfsv4 ops
443 */
444 static __be32
445 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
446 struct nfsd4_access *access)
447 {
448 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
449 return nfserr_inval;
450
451 access->ac_resp_access = access->ac_req_access;
452 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
453 &access->ac_supported);
454 }
455
456 static __be32
457 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
458 struct nfsd4_commit *commit)
459 {
460 __be32 status;
461
462 u32 *p = (u32 *)commit->co_verf.data;
463 *p++ = nfssvc_boot.tv_sec;
464 *p++ = nfssvc_boot.tv_usec;
465
466 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
467 commit->co_count);
468 if (status == nfserr_symlink)
469 status = nfserr_inval;
470 return status;
471 }
472
473 static __be32
474 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
475 struct nfsd4_create *create)
476 {
477 struct svc_fh resfh;
478 __be32 status;
479 dev_t rdev;
480
481 fh_init(&resfh, NFS4_FHSIZE);
482
483 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
484 NFSD_MAY_CREATE);
485 if (status == nfserr_symlink)
486 status = nfserr_notdir;
487 if (status)
488 return status;
489
490 status = check_attr_support(rqstp, cstate, create->cr_bmval,
491 nfsd_attrmask);
492 if (status)
493 return status;
494
495 switch (create->cr_type) {
496 case NF4LNK:
497 /* ugh! we have to null-terminate the linktext, or
498 * vfs_symlink() will choke. it is always safe to
499 * null-terminate by brute force, since at worst we
500 * will overwrite the first byte of the create namelen
501 * in the XDR buffer, which has already been extracted
502 * during XDR decode.
503 */
504 create->cr_linkname[create->cr_linklen] = 0;
505
506 status = nfsd_symlink(rqstp, &cstate->current_fh,
507 create->cr_name, create->cr_namelen,
508 create->cr_linkname, create->cr_linklen,
509 &resfh, &create->cr_iattr);
510 break;
511
512 case NF4BLK:
513 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
514 if (MAJOR(rdev) != create->cr_specdata1 ||
515 MINOR(rdev) != create->cr_specdata2)
516 return nfserr_inval;
517 status = nfsd_create(rqstp, &cstate->current_fh,
518 create->cr_name, create->cr_namelen,
519 &create->cr_iattr, S_IFBLK, rdev, &resfh);
520 break;
521
522 case NF4CHR:
523 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
524 if (MAJOR(rdev) != create->cr_specdata1 ||
525 MINOR(rdev) != create->cr_specdata2)
526 return nfserr_inval;
527 status = nfsd_create(rqstp, &cstate->current_fh,
528 create->cr_name, create->cr_namelen,
529 &create->cr_iattr,S_IFCHR, rdev, &resfh);
530 break;
531
532 case NF4SOCK:
533 status = nfsd_create(rqstp, &cstate->current_fh,
534 create->cr_name, create->cr_namelen,
535 &create->cr_iattr, S_IFSOCK, 0, &resfh);
536 break;
537
538 case NF4FIFO:
539 status = nfsd_create(rqstp, &cstate->current_fh,
540 create->cr_name, create->cr_namelen,
541 &create->cr_iattr, S_IFIFO, 0, &resfh);
542 break;
543
544 case NF4DIR:
545 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
546 status = nfsd_create(rqstp, &cstate->current_fh,
547 create->cr_name, create->cr_namelen,
548 &create->cr_iattr, S_IFDIR, 0, &resfh);
549 break;
550
551 default:
552 status = nfserr_badtype;
553 }
554
555 if (status)
556 goto out;
557
558 if (create->cr_acl != NULL)
559 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
560 create->cr_bmval);
561
562 fh_unlock(&cstate->current_fh);
563 set_change_info(&create->cr_cinfo, &cstate->current_fh);
564 fh_dup2(&cstate->current_fh, &resfh);
565 out:
566 fh_put(&resfh);
567 return status;
568 }
569
570 static __be32
571 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
572 struct nfsd4_getattr *getattr)
573 {
574 __be32 status;
575
576 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
577 if (status)
578 return status;
579
580 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
581 return nfserr_inval;
582
583 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
584 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
585 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
586
587 getattr->ga_fhp = &cstate->current_fh;
588 return nfs_ok;
589 }
590
591 static __be32
592 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
593 struct nfsd4_link *link)
594 {
595 __be32 status = nfserr_nofilehandle;
596
597 if (!cstate->save_fh.fh_dentry)
598 return status;
599 status = nfsd_link(rqstp, &cstate->current_fh,
600 link->li_name, link->li_namelen, &cstate->save_fh);
601 if (!status)
602 set_change_info(&link->li_cinfo, &cstate->current_fh);
603 return status;
604 }
605
606 static __be32
607 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
608 void *arg)
609 {
610 struct svc_fh tmp_fh;
611 __be32 ret;
612
613 fh_init(&tmp_fh, NFS4_FHSIZE);
614 ret = exp_pseudoroot(rqstp, &tmp_fh);
615 if (ret)
616 return ret;
617 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
618 fh_put(&tmp_fh);
619 return nfserr_noent;
620 }
621 fh_put(&tmp_fh);
622 return nfsd_lookup(rqstp, &cstate->current_fh,
623 "..", 2, &cstate->current_fh);
624 }
625
626 static __be32
627 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
628 struct nfsd4_lookup *lookup)
629 {
630 return nfsd_lookup(rqstp, &cstate->current_fh,
631 lookup->lo_name, lookup->lo_len,
632 &cstate->current_fh);
633 }
634
635 static __be32
636 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
637 struct nfsd4_read *read)
638 {
639 __be32 status;
640
641 /* no need to check permission - this will be done in nfsd_read() */
642
643 read->rd_filp = NULL;
644 if (read->rd_offset >= OFFSET_MAX)
645 return nfserr_inval;
646
647 nfs4_lock_state();
648 /* check stateid */
649 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
650 RD_STATE, &read->rd_filp))) {
651 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
652 goto out;
653 }
654 if (read->rd_filp)
655 get_file(read->rd_filp);
656 status = nfs_ok;
657 out:
658 nfs4_unlock_state();
659 read->rd_rqstp = rqstp;
660 read->rd_fhp = &cstate->current_fh;
661 return status;
662 }
663
664 static __be32
665 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
666 struct nfsd4_readdir *readdir)
667 {
668 u64 cookie = readdir->rd_cookie;
669 static const nfs4_verifier zeroverf;
670
671 /* no need to check permission - this will be done in nfsd_readdir() */
672
673 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
674 return nfserr_inval;
675
676 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
677 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
678 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
679
680 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
681 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
682 return nfserr_bad_cookie;
683
684 readdir->rd_rqstp = rqstp;
685 readdir->rd_fhp = &cstate->current_fh;
686 return nfs_ok;
687 }
688
689 static __be32
690 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
691 struct nfsd4_readlink *readlink)
692 {
693 readlink->rl_rqstp = rqstp;
694 readlink->rl_fhp = &cstate->current_fh;
695 return nfs_ok;
696 }
697
698 static __be32
699 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
700 struct nfsd4_remove *remove)
701 {
702 __be32 status;
703
704 if (locks_in_grace())
705 return nfserr_grace;
706 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
707 remove->rm_name, remove->rm_namelen);
708 if (status == nfserr_symlink)
709 return nfserr_notdir;
710 if (!status) {
711 fh_unlock(&cstate->current_fh);
712 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
713 }
714 return status;
715 }
716
717 static __be32
718 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
719 struct nfsd4_rename *rename)
720 {
721 __be32 status = nfserr_nofilehandle;
722
723 if (!cstate->save_fh.fh_dentry)
724 return status;
725 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
726 & NFSEXP_NOSUBTREECHECK))
727 return nfserr_grace;
728 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
729 rename->rn_snamelen, &cstate->current_fh,
730 rename->rn_tname, rename->rn_tnamelen);
731
732 /* the underlying filesystem returns different error's than required
733 * by NFSv4. both save_fh and current_fh have been verified.. */
734 if (status == nfserr_isdir)
735 status = nfserr_exist;
736 else if ((status == nfserr_notdir) &&
737 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
738 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
739 status = nfserr_exist;
740 else if (status == nfserr_symlink)
741 status = nfserr_notdir;
742
743 if (!status) {
744 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
745 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
746 }
747 return status;
748 }
749
750 static __be32
751 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 struct nfsd4_secinfo *secinfo)
753 {
754 struct svc_fh resfh;
755 struct svc_export *exp;
756 struct dentry *dentry;
757 __be32 err;
758
759 fh_init(&resfh, NFS4_FHSIZE);
760 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
761 secinfo->si_name, secinfo->si_namelen,
762 &exp, &dentry);
763 if (err)
764 return err;
765 if (dentry->d_inode == NULL) {
766 exp_put(exp);
767 err = nfserr_noent;
768 } else
769 secinfo->si_exp = exp;
770 dput(dentry);
771 return err;
772 }
773
774 static __be32
775 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
776 struct nfsd4_setattr *setattr)
777 {
778 __be32 status = nfs_ok;
779
780 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
781 nfs4_lock_state();
782 status = nfs4_preprocess_stateid_op(cstate,
783 &setattr->sa_stateid, WR_STATE, NULL);
784 nfs4_unlock_state();
785 if (status) {
786 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
787 return status;
788 }
789 }
790 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
791 if (status)
792 return status;
793 status = nfs_ok;
794
795 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
796 nfsd_attrmask);
797 if (status)
798 goto out;
799
800 if (setattr->sa_acl != NULL)
801 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
802 setattr->sa_acl);
803 if (status)
804 goto out;
805 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
806 0, (time_t)0);
807 out:
808 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
809 return status;
810 }
811
812 static __be32
813 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
814 struct nfsd4_write *write)
815 {
816 stateid_t *stateid = &write->wr_stateid;
817 struct file *filp = NULL;
818 u32 *p;
819 __be32 status = nfs_ok;
820 unsigned long cnt;
821
822 /* no need to check permission - this will be done in nfsd_write() */
823
824 if (write->wr_offset >= OFFSET_MAX)
825 return nfserr_inval;
826
827 nfs4_lock_state();
828 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
829 if (filp)
830 get_file(filp);
831 nfs4_unlock_state();
832
833 if (status) {
834 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
835 return status;
836 }
837
838 cnt = write->wr_buflen;
839 write->wr_how_written = write->wr_stable_how;
840 p = (u32 *)write->wr_verifier.data;
841 *p++ = nfssvc_boot.tv_sec;
842 *p++ = nfssvc_boot.tv_usec;
843
844 status = nfsd_write(rqstp, &cstate->current_fh, filp,
845 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
846 &cnt, &write->wr_how_written);
847 if (filp)
848 fput(filp);
849
850 write->wr_bytes_written = cnt;
851
852 if (status == nfserr_symlink)
853 status = nfserr_inval;
854 return status;
855 }
856
857 /* This routine never returns NFS_OK! If there are no other errors, it
858 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
859 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
860 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
861 */
862 static __be32
863 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 struct nfsd4_verify *verify)
865 {
866 __be32 *buf, *p;
867 int count;
868 __be32 status;
869
870 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
871 if (status)
872 return status;
873
874 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
875 if (status)
876 return status;
877
878 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
879 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
880 return nfserr_inval;
881 if (verify->ve_attrlen & 3)
882 return nfserr_inval;
883
884 /* count in words:
885 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
886 */
887 count = 4 + (verify->ve_attrlen >> 2);
888 buf = kmalloc(count << 2, GFP_KERNEL);
889 if (!buf)
890 return nfserr_resource;
891
892 status = nfsd4_encode_fattr(&cstate->current_fh,
893 cstate->current_fh.fh_export,
894 cstate->current_fh.fh_dentry, buf,
895 &count, verify->ve_bmval,
896 rqstp, 0);
897
898 /* this means that nfsd4_encode_fattr() ran out of space */
899 if (status == nfserr_resource && count == 0)
900 status = nfserr_not_same;
901 if (status)
902 goto out_kfree;
903
904 /* skip bitmap */
905 p = buf + 1 + ntohl(buf[0]);
906 status = nfserr_not_same;
907 if (ntohl(*p++) != verify->ve_attrlen)
908 goto out_kfree;
909 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
910 status = nfserr_same;
911
912 out_kfree:
913 kfree(buf);
914 return status;
915 }
916
917 static __be32
918 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
919 struct nfsd4_verify *verify)
920 {
921 __be32 status;
922
923 status = _nfsd4_verify(rqstp, cstate, verify);
924 return status == nfserr_not_same ? nfs_ok : status;
925 }
926
927 static __be32
928 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
929 struct nfsd4_verify *verify)
930 {
931 __be32 status;
932
933 status = _nfsd4_verify(rqstp, cstate, verify);
934 return status == nfserr_same ? nfs_ok : status;
935 }
936
937 /*
938 * NULL call.
939 */
940 static __be32
941 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
942 {
943 return nfs_ok;
944 }
945
946 static inline void nfsd4_increment_op_stats(u32 opnum)
947 {
948 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
949 nfsdstats.nfs4_opcount[opnum]++;
950 }
951
952 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
953 void *);
954 enum nfsd4_op_flags {
955 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
956 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
957 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
958 };
959
960 struct nfsd4_operation {
961 nfsd4op_func op_func;
962 u32 op_flags;
963 char *op_name;
964 };
965
966 static struct nfsd4_operation nfsd4_ops[];
967
968 static const char *nfsd4_op_name(unsigned opnum);
969
970 /*
971 * Enforce NFSv4.1 COMPOUND ordering rules.
972 *
973 * TODO:
974 * - enforce NFS4ERR_NOT_ONLY_OP,
975 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
976 */
977 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
978 {
979 if (args->minorversion && args->opcnt > 0) {
980 struct nfsd4_op *op = &args->ops[0];
981 return (op->status == nfserr_op_illegal) ||
982 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
983 }
984 return true;
985 }
986
987 /*
988 * COMPOUND call.
989 */
990 static __be32
991 nfsd4_proc_compound(struct svc_rqst *rqstp,
992 struct nfsd4_compoundargs *args,
993 struct nfsd4_compoundres *resp)
994 {
995 struct nfsd4_op *op;
996 struct nfsd4_operation *opdesc;
997 struct nfsd4_compound_state *cstate = &resp->cstate;
998 int slack_bytes;
999 __be32 status;
1000
1001 resp->xbuf = &rqstp->rq_res;
1002 resp->p = rqstp->rq_res.head[0].iov_base +
1003 rqstp->rq_res.head[0].iov_len;
1004 resp->tagp = resp->p;
1005 /* reserve space for: taglen, tag, and opcnt */
1006 resp->p += 2 + XDR_QUADLEN(args->taglen);
1007 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1008 resp->taglen = args->taglen;
1009 resp->tag = args->tag;
1010 resp->opcnt = 0;
1011 resp->rqstp = rqstp;
1012 resp->cstate.minorversion = args->minorversion;
1013 resp->cstate.replay_owner = NULL;
1014 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1015 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1016 /* Use the deferral mechanism only for NFSv4.0 compounds */
1017 rqstp->rq_usedeferral = (args->minorversion == 0);
1018
1019 /*
1020 * According to RFC3010, this takes precedence over all other errors.
1021 */
1022 status = nfserr_minor_vers_mismatch;
1023 if (args->minorversion > nfsd_supported_minorversion)
1024 goto out;
1025
1026 if (!nfs41_op_ordering_ok(args)) {
1027 op = &args->ops[0];
1028 op->status = nfserr_sequence_pos;
1029 goto encode_op;
1030 }
1031
1032 status = nfs_ok;
1033 while (!status && resp->opcnt < args->opcnt) {
1034 op = &args->ops[resp->opcnt++];
1035
1036 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1037 resp->opcnt, args->opcnt, op->opnum,
1038 nfsd4_op_name(op->opnum));
1039 /*
1040 * The XDR decode routines may have pre-set op->status;
1041 * for example, if there is a miscellaneous XDR error
1042 * it will be set to nfserr_bad_xdr.
1043 */
1044 if (op->status)
1045 goto encode_op;
1046
1047 /* We must be able to encode a successful response to
1048 * this operation, with enough room left over to encode a
1049 * failed response to the next operation. If we don't
1050 * have enough room, fail with ERR_RESOURCE.
1051 */
1052 slack_bytes = (char *)resp->end - (char *)resp->p;
1053 if (slack_bytes < COMPOUND_SLACK_SPACE
1054 + COMPOUND_ERR_SLACK_SPACE) {
1055 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1056 op->status = nfserr_resource;
1057 goto encode_op;
1058 }
1059
1060 opdesc = &nfsd4_ops[op->opnum];
1061
1062 if (!cstate->current_fh.fh_dentry) {
1063 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1064 op->status = nfserr_nofilehandle;
1065 goto encode_op;
1066 }
1067 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1068 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1069 op->status = nfserr_moved;
1070 goto encode_op;
1071 }
1072
1073 if (opdesc->op_func)
1074 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1075 else
1076 BUG_ON(op->status == nfs_ok);
1077
1078 encode_op:
1079 /* Only from SEQUENCE */
1080 if (resp->cstate.status == nfserr_replay_cache) {
1081 dprintk("%s NFS4.1 replay from cache\n", __func__);
1082 status = op->status;
1083 goto out;
1084 }
1085 if (op->status == nfserr_replay_me) {
1086 op->replay = &cstate->replay_owner->so_replay;
1087 nfsd4_encode_replay(resp, op);
1088 status = op->status = op->replay->rp_status;
1089 } else {
1090 nfsd4_encode_operation(resp, op);
1091 status = op->status;
1092 }
1093
1094 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1095 args->ops, args->opcnt, resp->opcnt, op->opnum,
1096 be32_to_cpu(status));
1097
1098 if (cstate->replay_owner) {
1099 nfs4_put_stateowner(cstate->replay_owner);
1100 cstate->replay_owner = NULL;
1101 }
1102 /* XXX Ugh, we need to get rid of this kind of special case: */
1103 if (op->opnum == OP_READ && op->u.read.rd_filp)
1104 fput(op->u.read.rd_filp);
1105
1106 nfsd4_increment_op_stats(op->opnum);
1107 }
1108 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1109 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1110 status = nfserr_jukebox;
1111 }
1112
1113 resp->cstate.status = status;
1114 fh_put(&resp->cstate.current_fh);
1115 fh_put(&resp->cstate.save_fh);
1116 BUG_ON(resp->cstate.replay_owner);
1117 out:
1118 nfsd4_release_compoundargs(args);
1119 /* Reset deferral mechanism for RPC deferrals */
1120 rqstp->rq_usedeferral = 1;
1121 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1122 return status;
1123 }
1124
1125 static struct nfsd4_operation nfsd4_ops[] = {
1126 [OP_ACCESS] = {
1127 .op_func = (nfsd4op_func)nfsd4_access,
1128 .op_name = "OP_ACCESS",
1129 },
1130 [OP_CLOSE] = {
1131 .op_func = (nfsd4op_func)nfsd4_close,
1132 .op_name = "OP_CLOSE",
1133 },
1134 [OP_COMMIT] = {
1135 .op_func = (nfsd4op_func)nfsd4_commit,
1136 .op_name = "OP_COMMIT",
1137 },
1138 [OP_CREATE] = {
1139 .op_func = (nfsd4op_func)nfsd4_create,
1140 .op_name = "OP_CREATE",
1141 },
1142 [OP_DELEGRETURN] = {
1143 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1144 .op_name = "OP_DELEGRETURN",
1145 },
1146 [OP_GETATTR] = {
1147 .op_func = (nfsd4op_func)nfsd4_getattr,
1148 .op_flags = ALLOWED_ON_ABSENT_FS,
1149 .op_name = "OP_GETATTR",
1150 },
1151 [OP_GETFH] = {
1152 .op_func = (nfsd4op_func)nfsd4_getfh,
1153 .op_name = "OP_GETFH",
1154 },
1155 [OP_LINK] = {
1156 .op_func = (nfsd4op_func)nfsd4_link,
1157 .op_name = "OP_LINK",
1158 },
1159 [OP_LOCK] = {
1160 .op_func = (nfsd4op_func)nfsd4_lock,
1161 .op_name = "OP_LOCK",
1162 },
1163 [OP_LOCKT] = {
1164 .op_func = (nfsd4op_func)nfsd4_lockt,
1165 .op_name = "OP_LOCKT",
1166 },
1167 [OP_LOCKU] = {
1168 .op_func = (nfsd4op_func)nfsd4_locku,
1169 .op_name = "OP_LOCKU",
1170 },
1171 [OP_LOOKUP] = {
1172 .op_func = (nfsd4op_func)nfsd4_lookup,
1173 .op_name = "OP_LOOKUP",
1174 },
1175 [OP_LOOKUPP] = {
1176 .op_func = (nfsd4op_func)nfsd4_lookupp,
1177 .op_name = "OP_LOOKUPP",
1178 },
1179 [OP_NVERIFY] = {
1180 .op_func = (nfsd4op_func)nfsd4_nverify,
1181 .op_name = "OP_NVERIFY",
1182 },
1183 [OP_OPEN] = {
1184 .op_func = (nfsd4op_func)nfsd4_open,
1185 .op_name = "OP_OPEN",
1186 },
1187 [OP_OPEN_CONFIRM] = {
1188 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1189 .op_name = "OP_OPEN_CONFIRM",
1190 },
1191 [OP_OPEN_DOWNGRADE] = {
1192 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1193 .op_name = "OP_OPEN_DOWNGRADE",
1194 },
1195 [OP_PUTFH] = {
1196 .op_func = (nfsd4op_func)nfsd4_putfh,
1197 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1198 .op_name = "OP_PUTFH",
1199 },
1200 [OP_PUTPUBFH] = {
1201 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1202 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1203 .op_name = "OP_PUTPUBFH",
1204 },
1205 [OP_PUTROOTFH] = {
1206 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1207 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1208 .op_name = "OP_PUTROOTFH",
1209 },
1210 [OP_READ] = {
1211 .op_func = (nfsd4op_func)nfsd4_read,
1212 .op_name = "OP_READ",
1213 },
1214 [OP_READDIR] = {
1215 .op_func = (nfsd4op_func)nfsd4_readdir,
1216 .op_name = "OP_READDIR",
1217 },
1218 [OP_READLINK] = {
1219 .op_func = (nfsd4op_func)nfsd4_readlink,
1220 .op_name = "OP_READLINK",
1221 },
1222 [OP_REMOVE] = {
1223 .op_func = (nfsd4op_func)nfsd4_remove,
1224 .op_name = "OP_REMOVE",
1225 },
1226 [OP_RENAME] = {
1227 .op_name = "OP_RENAME",
1228 .op_func = (nfsd4op_func)nfsd4_rename,
1229 },
1230 [OP_RENEW] = {
1231 .op_func = (nfsd4op_func)nfsd4_renew,
1232 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1233 .op_name = "OP_RENEW",
1234 },
1235 [OP_RESTOREFH] = {
1236 .op_func = (nfsd4op_func)nfsd4_restorefh,
1237 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1238 .op_name = "OP_RESTOREFH",
1239 },
1240 [OP_SAVEFH] = {
1241 .op_func = (nfsd4op_func)nfsd4_savefh,
1242 .op_name = "OP_SAVEFH",
1243 },
1244 [OP_SECINFO] = {
1245 .op_func = (nfsd4op_func)nfsd4_secinfo,
1246 .op_name = "OP_SECINFO",
1247 },
1248 [OP_SETATTR] = {
1249 .op_func = (nfsd4op_func)nfsd4_setattr,
1250 .op_name = "OP_SETATTR",
1251 },
1252 [OP_SETCLIENTID] = {
1253 .op_func = (nfsd4op_func)nfsd4_setclientid,
1254 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1255 .op_name = "OP_SETCLIENTID",
1256 },
1257 [OP_SETCLIENTID_CONFIRM] = {
1258 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1259 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1260 .op_name = "OP_SETCLIENTID_CONFIRM",
1261 },
1262 [OP_VERIFY] = {
1263 .op_func = (nfsd4op_func)nfsd4_verify,
1264 .op_name = "OP_VERIFY",
1265 },
1266 [OP_WRITE] = {
1267 .op_func = (nfsd4op_func)nfsd4_write,
1268 .op_name = "OP_WRITE",
1269 },
1270 [OP_RELEASE_LOCKOWNER] = {
1271 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1272 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1273 .op_name = "OP_RELEASE_LOCKOWNER",
1274 },
1275
1276 /* NFSv4.1 operations */
1277 [OP_EXCHANGE_ID] = {
1278 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1279 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1280 .op_name = "OP_EXCHANGE_ID",
1281 },
1282 [OP_CREATE_SESSION] = {
1283 .op_func = (nfsd4op_func)nfsd4_create_session,
1284 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1285 .op_name = "OP_CREATE_SESSION",
1286 },
1287 [OP_DESTROY_SESSION] = {
1288 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1290 .op_name = "OP_DESTROY_SESSION",
1291 },
1292 [OP_SEQUENCE] = {
1293 .op_func = (nfsd4op_func)nfsd4_sequence,
1294 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1295 .op_name = "OP_SEQUENCE",
1296 },
1297 };
1298
1299 static const char *nfsd4_op_name(unsigned opnum)
1300 {
1301 if (opnum < ARRAY_SIZE(nfsd4_ops))
1302 return nfsd4_ops[opnum].op_name;
1303 return "unknown_operation";
1304 }
1305
1306 #define nfsd4_voidres nfsd4_voidargs
1307 struct nfsd4_voidargs { int dummy; };
1308
1309 /*
1310 * TODO: At the present time, the NFSv4 server does not do XID caching
1311 * of requests. Implementing XID caching would not be a serious problem,
1312 * although it would require a mild change in interfaces since one
1313 * doesn't know whether an NFSv4 request is idempotent until after the
1314 * XDR decode. However, XID caching totally confuses pynfs (Peter
1315 * Astrand's regression testsuite for NFSv4 servers), which reuses
1316 * XID's liberally, so I've left it unimplemented until pynfs generates
1317 * better XID's.
1318 */
1319 static struct svc_procedure nfsd_procedures4[2] = {
1320 [NFSPROC4_NULL] = {
1321 .pc_func = (svc_procfunc) nfsd4_proc_null,
1322 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1323 .pc_argsize = sizeof(struct nfsd4_voidargs),
1324 .pc_ressize = sizeof(struct nfsd4_voidres),
1325 .pc_cachetype = RC_NOCACHE,
1326 .pc_xdrressize = 1,
1327 },
1328 [NFSPROC4_COMPOUND] = {
1329 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1330 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1331 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1332 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1333 .pc_ressize = sizeof(struct nfsd4_compoundres),
1334 .pc_cachetype = RC_NOCACHE,
1335 .pc_xdrressize = NFSD_BUFSIZE/4,
1336 },
1337 };
1338
1339 struct svc_version nfsd_version4 = {
1340 .vs_vers = 4,
1341 .vs_nproc = 2,
1342 .vs_proc = nfsd_procedures4,
1343 .vs_dispatch = nfsd_dispatch,
1344 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1345 };
1346
1347 /*
1348 * Local variables:
1349 * c-basic-offset: 8
1350 * End:
1351 */
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