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ipv4: RCU conversion of ip_route_input_slow/ip_route_input_mc
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4proc.c
blob59ec449b0c7fd8b61040703ee98fa51e7c40e280
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 #include <linux/slab.h>
37
38 #include "cache.h"
39 #include "xdr4.h"
40 #include "vfs.h"
41
42 #define NFSDDBG_FACILITY NFSDDBG_PROC
43
44 static u32 nfsd_attrmask[] = {
45 NFSD_WRITEABLE_ATTRS_WORD0,
46 NFSD_WRITEABLE_ATTRS_WORD1,
47 NFSD_WRITEABLE_ATTRS_WORD2
48 };
49
50 static u32 nfsd41_ex_attrmask[] = {
51 NFSD_SUPPATTR_EXCLCREAT_WORD0,
52 NFSD_SUPPATTR_EXCLCREAT_WORD1,
53 NFSD_SUPPATTR_EXCLCREAT_WORD2
54 };
55
56 static __be32
57 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
58 u32 *bmval, u32 *writable)
59 {
60 struct dentry *dentry = cstate->current_fh.fh_dentry;
61
62 /*
63 * Check about attributes are supported by the NFSv4 server or not.
64 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
65 */
66 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
67 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
68 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
69 return nfserr_attrnotsupp;
70
71 /*
72 * Check FATTR4_WORD0_ACL can be supported
73 * in current environment or not.
74 */
75 if (bmval[0] & FATTR4_WORD0_ACL) {
76 if (!IS_POSIXACL(dentry->d_inode))
77 return nfserr_attrnotsupp;
78 }
79
80 /*
81 * According to spec, read-only attributes return ERR_INVAL.
82 */
83 if (writable) {
84 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
85 (bmval[2] & ~writable[2]))
86 return nfserr_inval;
87 }
88
89 return nfs_ok;
90 }
91
92 static __be32
93 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
94 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
95 {
96 __be32 status = nfs_ok;
97
98 if (open->op_create == NFS4_OPEN_CREATE) {
99 if (open->op_createmode == NFS4_CREATE_UNCHECKED
100 || open->op_createmode == NFS4_CREATE_GUARDED)
101 status = check_attr_support(rqstp, cstate,
102 open->op_bmval, nfsd_attrmask);
103 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd41_ex_attrmask);
106 }
107
108 return status;
109 }
110
111 static int
112 is_create_with_attrs(struct nfsd4_open *open)
113 {
114 return open->op_create == NFS4_OPEN_CREATE
115 && (open->op_createmode == NFS4_CREATE_UNCHECKED
116 || open->op_createmode == NFS4_CREATE_GUARDED
117 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
118 }
119
120 /*
121 * if error occurs when setting the acl, just clear the acl bit
122 * in the returned attr bitmap.
123 */
124 static void
125 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
126 struct nfs4_acl *acl, u32 *bmval)
127 {
128 __be32 status;
129
130 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
131 if (status)
132 /*
133 * We should probably fail the whole open at this point,
134 * but we've already created the file, so it's too late;
135 * So this seems the least of evils:
136 */
137 bmval[0] &= ~FATTR4_WORD0_ACL;
138 }
139
140 static inline void
141 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
142 {
143 fh_put(dst);
144 dget(src->fh_dentry);
145 if (src->fh_export)
146 cache_get(&src->fh_export->h);
147 *dst = *src;
148 }
149
150 static __be32
151 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
152 {
153 __be32 status;
154
155 if (open->op_truncate &&
156 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
157 return nfserr_inval;
158
159 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
160 accmode |= NFSD_MAY_READ;
161 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
162 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
163 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
164 accmode |= NFSD_MAY_WRITE;
165
166 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
167
168 return status;
169 }
170
171 static __be32
172 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
173 {
174 struct svc_fh resfh;
175 __be32 status;
176 int created = 0;
177
178 fh_init(&resfh, NFS4_FHSIZE);
179 open->op_truncate = 0;
180
181 if (open->op_create) {
182 /* FIXME: check session persistence and pnfs flags.
183 * The nfsv4.1 spec requires the following semantics:
184 *
185 * Persistent | pNFS | Server REQUIRED | Client Allowed
186 * Reply Cache | server | |
187 * -------------+--------+-----------------+--------------------
188 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
189 * | | | (SHOULD)
190 * | | and EXCLUSIVE4 | or EXCLUSIVE4
191 * | | | (SHOULD NOT)
192 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
193 * yes | no | GUARDED4 | GUARDED4
194 * yes | yes | GUARDED4 | GUARDED4
195 */
196
197 /*
198 * Note: create modes (UNCHECKED,GUARDED...) are the same
199 * in NFSv4 as in v3.
200 */
201 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
202 open->op_fname.len, &open->op_iattr,
203 &resfh, open->op_createmode,
204 (u32 *)open->op_verf.data,
205 &open->op_truncate, &created);
206
207 /*
208 * Following rfc 3530 14.2.16, use the returned bitmask
209 * to indicate which attributes we used to store the
210 * verifier:
211 */
212 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
213 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
214 FATTR4_WORD1_TIME_MODIFY);
215 } else {
216 status = nfsd_lookup(rqstp, current_fh,
217 open->op_fname.data, open->op_fname.len, &resfh);
218 fh_unlock(current_fh);
219 }
220 if (status)
221 goto out;
222
223 if (is_create_with_attrs(open) && open->op_acl != NULL)
224 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
225
226 set_change_info(&open->op_cinfo, current_fh);
227 fh_dup2(current_fh, &resfh);
228
229 /* set reply cache */
230 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
231 &resfh.fh_handle);
232 if (!created)
233 status = do_open_permission(rqstp, current_fh, open,
234 NFSD_MAY_NOP);
235
236 out:
237 fh_put(&resfh);
238 return status;
239 }
240
241 static __be32
242 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
243 {
244 __be32 status;
245
246 /* Only reclaims from previously confirmed clients are valid */
247 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
248 return status;
249
250 /* We don't know the target directory, and therefore can not
251 * set the change info
252 */
253
254 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
255
256 /* set replay cache */
257 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
258 &current_fh->fh_handle);
259
260 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
261 (open->op_iattr.ia_size == 0);
262
263 status = do_open_permission(rqstp, current_fh, open,
264 NFSD_MAY_OWNER_OVERRIDE);
265
266 return status;
267 }
268
269 static void
270 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
271 {
272 struct nfsd4_sessionid *sid =
273 (struct nfsd4_sessionid *)session->se_sessionid.data;
274
275 clid->cl_boot = sid->clientid.cl_boot;
276 clid->cl_id = sid->clientid.cl_id;
277 }
278
279 static __be32
280 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
281 struct nfsd4_open *open)
282 {
283 __be32 status;
284 struct nfsd4_compoundres *resp;
285
286 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
287 (int)open->op_fname.len, open->op_fname.data,
288 open->op_stateowner);
289
290 /* This check required by spec. */
291 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
292 return nfserr_inval;
293
294 if (nfsd4_has_session(cstate))
295 copy_clientid(&open->op_clientid, cstate->session);
296
297 nfs4_lock_state();
298
299 /* check seqid for replay. set nfs4_owner */
300 resp = rqstp->rq_resp;
301 status = nfsd4_process_open1(&resp->cstate, open);
302 if (status == nfserr_replay_me) {
303 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
304 fh_put(&cstate->current_fh);
305 fh_copy_shallow(&cstate->current_fh.fh_handle,
306 &rp->rp_openfh);
307 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
308 if (status)
309 dprintk("nfsd4_open: replay failed"
310 " restoring previous filehandle\n");
311 else
312 status = nfserr_replay_me;
313 }
314 if (status)
315 goto out;
316
317 status = nfsd4_check_open_attributes(rqstp, cstate, open);
318 if (status)
319 goto out;
320
321 /* Openowner is now set, so sequence id will get bumped. Now we need
322 * these checks before we do any creates: */
323 status = nfserr_grace;
324 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
325 goto out;
326 status = nfserr_no_grace;
327 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
328 goto out;
329
330 switch (open->op_claim_type) {
331 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
332 case NFS4_OPEN_CLAIM_NULL:
333 /*
334 * (1) set CURRENT_FH to the file being opened,
335 * creating it if necessary, (2) set open->op_cinfo,
336 * (3) set open->op_truncate if the file is to be
337 * truncated after opening, (4) do permission checking.
338 */
339 status = do_open_lookup(rqstp, &cstate->current_fh,
340 open);
341 if (status)
342 goto out;
343 break;
344 case NFS4_OPEN_CLAIM_PREVIOUS:
345 open->op_stateowner->so_confirmed = 1;
346 /*
347 * The CURRENT_FH is already set to the file being
348 * opened. (1) set open->op_cinfo, (2) set
349 * open->op_truncate if the file is to be truncated
350 * after opening, (3) do permission checking.
351 */
352 status = do_open_fhandle(rqstp, &cstate->current_fh,
353 open);
354 if (status)
355 goto out;
356 break;
357 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
358 open->op_stateowner->so_confirmed = 1;
359 dprintk("NFSD: unsupported OPEN claim type %d\n",
360 open->op_claim_type);
361 status = nfserr_notsupp;
362 goto out;
363 default:
364 dprintk("NFSD: Invalid OPEN claim type %d\n",
365 open->op_claim_type);
366 status = nfserr_inval;
367 goto out;
368 }
369 /*
370 * nfsd4_process_open2() does the actual opening of the file. If
371 * successful, it (1) truncates the file if open->op_truncate was
372 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
373 */
374 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
375 out:
376 if (open->op_stateowner) {
377 nfs4_get_stateowner(open->op_stateowner);
378 cstate->replay_owner = open->op_stateowner;
379 }
380 nfs4_unlock_state();
381 return status;
382 }
383
384 /*
385 * filehandle-manipulating ops.
386 */
387 static __be32
388 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
389 struct svc_fh **getfh)
390 {
391 if (!cstate->current_fh.fh_dentry)
392 return nfserr_nofilehandle;
393
394 *getfh = &cstate->current_fh;
395 return nfs_ok;
396 }
397
398 static __be32
399 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
400 struct nfsd4_putfh *putfh)
401 {
402 fh_put(&cstate->current_fh);
403 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
404 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
405 putfh->pf_fhlen);
406 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
407 }
408
409 static __be32
410 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
411 void *arg)
412 {
413 __be32 status;
414
415 fh_put(&cstate->current_fh);
416 status = exp_pseudoroot(rqstp, &cstate->current_fh);
417 return status;
418 }
419
420 static __be32
421 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
422 void *arg)
423 {
424 if (!cstate->save_fh.fh_dentry)
425 return nfserr_restorefh;
426
427 fh_dup2(&cstate->current_fh, &cstate->save_fh);
428 return nfs_ok;
429 }
430
431 static __be32
432 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
433 void *arg)
434 {
435 if (!cstate->current_fh.fh_dentry)
436 return nfserr_nofilehandle;
437
438 fh_dup2(&cstate->save_fh, &cstate->current_fh);
439 return nfs_ok;
440 }
441
442 /*
443 * misc nfsv4 ops
444 */
445 static __be32
446 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
447 struct nfsd4_access *access)
448 {
449 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
450 return nfserr_inval;
451
452 access->ac_resp_access = access->ac_req_access;
453 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
454 &access->ac_supported);
455 }
456
457 static __be32
458 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
459 struct nfsd4_commit *commit)
460 {
461 __be32 status;
462
463 u32 *p = (u32 *)commit->co_verf.data;
464 *p++ = nfssvc_boot.tv_sec;
465 *p++ = nfssvc_boot.tv_usec;
466
467 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
468 commit->co_count);
469 if (status == nfserr_symlink)
470 status = nfserr_inval;
471 return status;
472 }
473
474 static __be32
475 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
476 struct nfsd4_create *create)
477 {
478 struct svc_fh resfh;
479 __be32 status;
480 dev_t rdev;
481
482 fh_init(&resfh, NFS4_FHSIZE);
483
484 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
485 NFSD_MAY_CREATE);
486 if (status == nfserr_symlink)
487 status = nfserr_notdir;
488 if (status)
489 return status;
490
491 status = check_attr_support(rqstp, cstate, create->cr_bmval,
492 nfsd_attrmask);
493 if (status)
494 return status;
495
496 switch (create->cr_type) {
497 case NF4LNK:
498 /* ugh! we have to null-terminate the linktext, or
499 * vfs_symlink() will choke. it is always safe to
500 * null-terminate by brute force, since at worst we
501 * will overwrite the first byte of the create namelen
502 * in the XDR buffer, which has already been extracted
503 * during XDR decode.
504 */
505 create->cr_linkname[create->cr_linklen] = 0;
506
507 status = nfsd_symlink(rqstp, &cstate->current_fh,
508 create->cr_name, create->cr_namelen,
509 create->cr_linkname, create->cr_linklen,
510 &resfh, &create->cr_iattr);
511 break;
512
513 case NF4BLK:
514 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
515 if (MAJOR(rdev) != create->cr_specdata1 ||
516 MINOR(rdev) != create->cr_specdata2)
517 return nfserr_inval;
518 status = nfsd_create(rqstp, &cstate->current_fh,
519 create->cr_name, create->cr_namelen,
520 &create->cr_iattr, S_IFBLK, rdev, &resfh);
521 break;
522
523 case NF4CHR:
524 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
525 if (MAJOR(rdev) != create->cr_specdata1 ||
526 MINOR(rdev) != create->cr_specdata2)
527 return nfserr_inval;
528 status = nfsd_create(rqstp, &cstate->current_fh,
529 create->cr_name, create->cr_namelen,
530 &create->cr_iattr,S_IFCHR, rdev, &resfh);
531 break;
532
533 case NF4SOCK:
534 status = nfsd_create(rqstp, &cstate->current_fh,
535 create->cr_name, create->cr_namelen,
536 &create->cr_iattr, S_IFSOCK, 0, &resfh);
537 break;
538
539 case NF4FIFO:
540 status = nfsd_create(rqstp, &cstate->current_fh,
541 create->cr_name, create->cr_namelen,
542 &create->cr_iattr, S_IFIFO, 0, &resfh);
543 break;
544
545 case NF4DIR:
546 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
547 status = nfsd_create(rqstp, &cstate->current_fh,
548 create->cr_name, create->cr_namelen,
549 &create->cr_iattr, S_IFDIR, 0, &resfh);
550 break;
551
552 default:
553 status = nfserr_badtype;
554 }
555
556 if (status)
557 goto out;
558
559 if (create->cr_acl != NULL)
560 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
561 create->cr_bmval);
562
563 fh_unlock(&cstate->current_fh);
564 set_change_info(&create->cr_cinfo, &cstate->current_fh);
565 fh_dup2(&cstate->current_fh, &resfh);
566 out:
567 fh_put(&resfh);
568 return status;
569 }
570
571 static __be32
572 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
573 struct nfsd4_getattr *getattr)
574 {
575 __be32 status;
576
577 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
578 if (status)
579 return status;
580
581 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
582 return nfserr_inval;
583
584 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
585 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
586 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
587
588 getattr->ga_fhp = &cstate->current_fh;
589 return nfs_ok;
590 }
591
592 static __be32
593 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
594 struct nfsd4_link *link)
595 {
596 __be32 status = nfserr_nofilehandle;
597
598 if (!cstate->save_fh.fh_dentry)
599 return status;
600 status = nfsd_link(rqstp, &cstate->current_fh,
601 link->li_name, link->li_namelen, &cstate->save_fh);
602 if (!status)
603 set_change_info(&link->li_cinfo, &cstate->current_fh);
604 return status;
605 }
606
607 static __be32
608 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
609 void *arg)
610 {
611 struct svc_fh tmp_fh;
612 __be32 ret;
613
614 fh_init(&tmp_fh, NFS4_FHSIZE);
615 ret = exp_pseudoroot(rqstp, &tmp_fh);
616 if (ret)
617 return ret;
618 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
619 fh_put(&tmp_fh);
620 return nfserr_noent;
621 }
622 fh_put(&tmp_fh);
623 return nfsd_lookup(rqstp, &cstate->current_fh,
624 "..", 2, &cstate->current_fh);
625 }
626
627 static __be32
628 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
629 struct nfsd4_lookup *lookup)
630 {
631 return nfsd_lookup(rqstp, &cstate->current_fh,
632 lookup->lo_name, lookup->lo_len,
633 &cstate->current_fh);
634 }
635
636 static __be32
637 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
638 struct nfsd4_read *read)
639 {
640 __be32 status;
641
642 /* no need to check permission - this will be done in nfsd_read() */
643
644 read->rd_filp = NULL;
645 if (read->rd_offset >= OFFSET_MAX)
646 return nfserr_inval;
647
648 nfs4_lock_state();
649 /* check stateid */
650 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
651 RD_STATE, &read->rd_filp))) {
652 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
653 goto out;
654 }
655 if (read->rd_filp)
656 get_file(read->rd_filp);
657 status = nfs_ok;
658 out:
659 nfs4_unlock_state();
660 read->rd_rqstp = rqstp;
661 read->rd_fhp = &cstate->current_fh;
662 return status;
663 }
664
665 static __be32
666 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
667 struct nfsd4_readdir *readdir)
668 {
669 u64 cookie = readdir->rd_cookie;
670 static const nfs4_verifier zeroverf;
671
672 /* no need to check permission - this will be done in nfsd_readdir() */
673
674 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
675 return nfserr_inval;
676
677 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
678 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
679 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
680
681 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
682 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
683 return nfserr_bad_cookie;
684
685 readdir->rd_rqstp = rqstp;
686 readdir->rd_fhp = &cstate->current_fh;
687 return nfs_ok;
688 }
689
690 static __be32
691 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
692 struct nfsd4_readlink *readlink)
693 {
694 readlink->rl_rqstp = rqstp;
695 readlink->rl_fhp = &cstate->current_fh;
696 return nfs_ok;
697 }
698
699 static __be32
700 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
701 struct nfsd4_remove *remove)
702 {
703 __be32 status;
704
705 if (locks_in_grace())
706 return nfserr_grace;
707 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
708 remove->rm_name, remove->rm_namelen);
709 if (status == nfserr_symlink)
710 return nfserr_notdir;
711 if (!status) {
712 fh_unlock(&cstate->current_fh);
713 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
714 }
715 return status;
716 }
717
718 static __be32
719 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
720 struct nfsd4_rename *rename)
721 {
722 __be32 status = nfserr_nofilehandle;
723
724 if (!cstate->save_fh.fh_dentry)
725 return status;
726 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
727 & NFSEXP_NOSUBTREECHECK))
728 return nfserr_grace;
729 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
730 rename->rn_snamelen, &cstate->current_fh,
731 rename->rn_tname, rename->rn_tnamelen);
732
733 /* the underlying filesystem returns different error's than required
734 * by NFSv4. both save_fh and current_fh have been verified.. */
735 if (status == nfserr_isdir)
736 status = nfserr_exist;
737 else if ((status == nfserr_notdir) &&
738 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
739 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
740 status = nfserr_exist;
741 else if (status == nfserr_symlink)
742 status = nfserr_notdir;
743
744 if (!status) {
745 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
746 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
747 }
748 return status;
749 }
750
751 static __be32
752 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
753 struct nfsd4_secinfo *secinfo)
754 {
755 struct svc_fh resfh;
756 struct svc_export *exp;
757 struct dentry *dentry;
758 __be32 err;
759
760 fh_init(&resfh, NFS4_FHSIZE);
761 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
762 secinfo->si_name, secinfo->si_namelen,
763 &exp, &dentry);
764 if (err)
765 return err;
766 if (dentry->d_inode == NULL) {
767 exp_put(exp);
768 err = nfserr_noent;
769 } else
770 secinfo->si_exp = exp;
771 dput(dentry);
772 return err;
773 }
774
775 static __be32
776 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
777 struct nfsd4_setattr *setattr)
778 {
779 __be32 status = nfs_ok;
780
781 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
782 nfs4_lock_state();
783 status = nfs4_preprocess_stateid_op(cstate,
784 &setattr->sa_stateid, WR_STATE, NULL);
785 nfs4_unlock_state();
786 if (status) {
787 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
788 return status;
789 }
790 }
791 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
792 if (status)
793 return status;
794 status = nfs_ok;
795
796 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
797 nfsd_attrmask);
798 if (status)
799 goto out;
800
801 if (setattr->sa_acl != NULL)
802 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
803 setattr->sa_acl);
804 if (status)
805 goto out;
806 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
807 0, (time_t)0);
808 out:
809 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
810 return status;
811 }
812
813 static __be32
814 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
815 struct nfsd4_write *write)
816 {
817 stateid_t *stateid = &write->wr_stateid;
818 struct file *filp = NULL;
819 u32 *p;
820 __be32 status = nfs_ok;
821 unsigned long cnt;
822
823 /* no need to check permission - this will be done in nfsd_write() */
824
825 if (write->wr_offset >= OFFSET_MAX)
826 return nfserr_inval;
827
828 nfs4_lock_state();
829 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
830 if (filp)
831 get_file(filp);
832 nfs4_unlock_state();
833
834 if (status) {
835 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
836 return status;
837 }
838
839 cnt = write->wr_buflen;
840 write->wr_how_written = write->wr_stable_how;
841 p = (u32 *)write->wr_verifier.data;
842 *p++ = nfssvc_boot.tv_sec;
843 *p++ = nfssvc_boot.tv_usec;
844
845 status = nfsd_write(rqstp, &cstate->current_fh, filp,
846 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
847 &cnt, &write->wr_how_written);
848 if (filp)
849 fput(filp);
850
851 write->wr_bytes_written = cnt;
852
853 if (status == nfserr_symlink)
854 status = nfserr_inval;
855 return status;
856 }
857
858 /* This routine never returns NFS_OK! If there are no other errors, it
859 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
860 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
861 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
862 */
863 static __be32
864 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
865 struct nfsd4_verify *verify)
866 {
867 __be32 *buf, *p;
868 int count;
869 __be32 status;
870
871 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
872 if (status)
873 return status;
874
875 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
876 if (status)
877 return status;
878
879 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
880 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
881 return nfserr_inval;
882 if (verify->ve_attrlen & 3)
883 return nfserr_inval;
884
885 /* count in words:
886 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
887 */
888 count = 4 + (verify->ve_attrlen >> 2);
889 buf = kmalloc(count << 2, GFP_KERNEL);
890 if (!buf)
891 return nfserr_resource;
892
893 status = nfsd4_encode_fattr(&cstate->current_fh,
894 cstate->current_fh.fh_export,
895 cstate->current_fh.fh_dentry, buf,
896 &count, verify->ve_bmval,
897 rqstp, 0);
898
899 /* this means that nfsd4_encode_fattr() ran out of space */
900 if (status == nfserr_resource && count == 0)
901 status = nfserr_not_same;
902 if (status)
903 goto out_kfree;
904
905 /* skip bitmap */
906 p = buf + 1 + ntohl(buf[0]);
907 status = nfserr_not_same;
908 if (ntohl(*p++) != verify->ve_attrlen)
909 goto out_kfree;
910 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
911 status = nfserr_same;
912
913 out_kfree:
914 kfree(buf);
915 return status;
916 }
917
918 static __be32
919 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
920 struct nfsd4_verify *verify)
921 {
922 __be32 status;
923
924 status = _nfsd4_verify(rqstp, cstate, verify);
925 return status == nfserr_not_same ? nfs_ok : status;
926 }
927
928 static __be32
929 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
930 struct nfsd4_verify *verify)
931 {
932 __be32 status;
933
934 status = _nfsd4_verify(rqstp, cstate, verify);
935 return status == nfserr_same ? nfs_ok : status;
936 }
937
938 /*
939 * NULL call.
940 */
941 static __be32
942 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
943 {
944 return nfs_ok;
945 }
946
947 static inline void nfsd4_increment_op_stats(u32 opnum)
948 {
949 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
950 nfsdstats.nfs4_opcount[opnum]++;
951 }
952
953 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
954 void *);
955 enum nfsd4_op_flags {
956 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
957 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */
958 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */
959 };
960
961 struct nfsd4_operation {
962 nfsd4op_func op_func;
963 u32 op_flags;
964 char *op_name;
965 };
966
967 static struct nfsd4_operation nfsd4_ops[];
968
969 static const char *nfsd4_op_name(unsigned opnum);
970
971 /*
972 * Enforce NFSv4.1 COMPOUND ordering rules:
973 *
974 * Also note, enforced elsewhere:
975 * - SEQUENCE other than as first op results in
976 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
977 * - BIND_CONN_TO_SESSION must be the only op in its compound
978 * (Will be enforced in nfsd4_bind_conn_to_session().)
979 * - DESTROY_SESSION must be the final operation in a compound, if
980 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
981 * (Enforced in nfsd4_destroy_session().)
982 */
983 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
984 {
985 struct nfsd4_op *op = &args->ops[0];
986
987 /* These ordering requirements don't apply to NFSv4.0: */
988 if (args->minorversion == 0)
989 return nfs_ok;
990 /* This is weird, but OK, not our problem: */
991 if (args->opcnt == 0)
992 return nfs_ok;
993 if (op->status == nfserr_op_illegal)
994 return nfs_ok;
995 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
996 return nfserr_op_not_in_session;
997 if (op->opnum == OP_SEQUENCE)
998 return nfs_ok;
999 if (args->opcnt != 1)
1000 return nfserr_not_only_op;
1001 return nfs_ok;
1002 }
1003
1004 /*
1005 * COMPOUND call.
1006 */
1007 static __be32
1008 nfsd4_proc_compound(struct svc_rqst *rqstp,
1009 struct nfsd4_compoundargs *args,
1010 struct nfsd4_compoundres *resp)
1011 {
1012 struct nfsd4_op *op;
1013 struct nfsd4_operation *opdesc;
1014 struct nfsd4_compound_state *cstate = &resp->cstate;
1015 int slack_bytes;
1016 __be32 status;
1017
1018 resp->xbuf = &rqstp->rq_res;
1019 resp->p = rqstp->rq_res.head[0].iov_base +
1020 rqstp->rq_res.head[0].iov_len;
1021 resp->tagp = resp->p;
1022 /* reserve space for: taglen, tag, and opcnt */
1023 resp->p += 2 + XDR_QUADLEN(args->taglen);
1024 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1025 resp->taglen = args->taglen;
1026 resp->tag = args->tag;
1027 resp->opcnt = 0;
1028 resp->rqstp = rqstp;
1029 resp->cstate.minorversion = args->minorversion;
1030 resp->cstate.replay_owner = NULL;
1031 resp->cstate.session = NULL;
1032 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1033 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1034 /* Use the deferral mechanism only for NFSv4.0 compounds */
1035 rqstp->rq_usedeferral = (args->minorversion == 0);
1036
1037 /*
1038 * According to RFC3010, this takes precedence over all other errors.
1039 */
1040 status = nfserr_minor_vers_mismatch;
1041 if (args->minorversion > nfsd_supported_minorversion)
1042 goto out;
1043
1044 status = nfs41_check_op_ordering(args);
1045 if (status) {
1046 op = &args->ops[0];
1047 op->status = status;
1048 goto encode_op;
1049 }
1050
1051 while (!status && resp->opcnt < args->opcnt) {
1052 op = &args->ops[resp->opcnt++];
1053
1054 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1055 resp->opcnt, args->opcnt, op->opnum,
1056 nfsd4_op_name(op->opnum));
1057 /*
1058 * The XDR decode routines may have pre-set op->status;
1059 * for example, if there is a miscellaneous XDR error
1060 * it will be set to nfserr_bad_xdr.
1061 */
1062 if (op->status)
1063 goto encode_op;
1064
1065 /* We must be able to encode a successful response to
1066 * this operation, with enough room left over to encode a
1067 * failed response to the next operation. If we don't
1068 * have enough room, fail with ERR_RESOURCE.
1069 */
1070 slack_bytes = (char *)resp->end - (char *)resp->p;
1071 if (slack_bytes < COMPOUND_SLACK_SPACE
1072 + COMPOUND_ERR_SLACK_SPACE) {
1073 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1074 op->status = nfserr_resource;
1075 goto encode_op;
1076 }
1077
1078 opdesc = &nfsd4_ops[op->opnum];
1079
1080 if (!cstate->current_fh.fh_dentry) {
1081 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1082 op->status = nfserr_nofilehandle;
1083 goto encode_op;
1084 }
1085 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1086 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1087 op->status = nfserr_moved;
1088 goto encode_op;
1089 }
1090
1091 if (opdesc->op_func)
1092 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1093 else
1094 BUG_ON(op->status == nfs_ok);
1095
1096 encode_op:
1097 /* Only from SEQUENCE */
1098 if (resp->cstate.status == nfserr_replay_cache) {
1099 dprintk("%s NFS4.1 replay from cache\n", __func__);
1100 status = op->status;
1101 goto out;
1102 }
1103 if (op->status == nfserr_replay_me) {
1104 op->replay = &cstate->replay_owner->so_replay;
1105 nfsd4_encode_replay(resp, op);
1106 status = op->status = op->replay->rp_status;
1107 } else {
1108 nfsd4_encode_operation(resp, op);
1109 status = op->status;
1110 }
1111
1112 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1113 args->ops, args->opcnt, resp->opcnt, op->opnum,
1114 be32_to_cpu(status));
1115
1116 if (cstate->replay_owner) {
1117 nfs4_put_stateowner(cstate->replay_owner);
1118 cstate->replay_owner = NULL;
1119 }
1120 /* XXX Ugh, we need to get rid of this kind of special case: */
1121 if (op->opnum == OP_READ && op->u.read.rd_filp)
1122 fput(op->u.read.rd_filp);
1123
1124 nfsd4_increment_op_stats(op->opnum);
1125 }
1126 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1127 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1128 status = nfserr_jukebox;
1129 }
1130
1131 resp->cstate.status = status;
1132 fh_put(&resp->cstate.current_fh);
1133 fh_put(&resp->cstate.save_fh);
1134 BUG_ON(resp->cstate.replay_owner);
1135 out:
1136 nfsd4_release_compoundargs(args);
1137 /* Reset deferral mechanism for RPC deferrals */
1138 rqstp->rq_usedeferral = 1;
1139 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1140 return status;
1141 }
1142
1143 static struct nfsd4_operation nfsd4_ops[] = {
1144 [OP_ACCESS] = {
1145 .op_func = (nfsd4op_func)nfsd4_access,
1146 .op_name = "OP_ACCESS",
1147 },
1148 [OP_CLOSE] = {
1149 .op_func = (nfsd4op_func)nfsd4_close,
1150 .op_name = "OP_CLOSE",
1151 },
1152 [OP_COMMIT] = {
1153 .op_func = (nfsd4op_func)nfsd4_commit,
1154 .op_name = "OP_COMMIT",
1155 },
1156 [OP_CREATE] = {
1157 .op_func = (nfsd4op_func)nfsd4_create,
1158 .op_name = "OP_CREATE",
1159 },
1160 [OP_DELEGRETURN] = {
1161 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1162 .op_name = "OP_DELEGRETURN",
1163 },
1164 [OP_GETATTR] = {
1165 .op_func = (nfsd4op_func)nfsd4_getattr,
1166 .op_flags = ALLOWED_ON_ABSENT_FS,
1167 .op_name = "OP_GETATTR",
1168 },
1169 [OP_GETFH] = {
1170 .op_func = (nfsd4op_func)nfsd4_getfh,
1171 .op_name = "OP_GETFH",
1172 },
1173 [OP_LINK] = {
1174 .op_func = (nfsd4op_func)nfsd4_link,
1175 .op_name = "OP_LINK",
1176 },
1177 [OP_LOCK] = {
1178 .op_func = (nfsd4op_func)nfsd4_lock,
1179 .op_name = "OP_LOCK",
1180 },
1181 [OP_LOCKT] = {
1182 .op_func = (nfsd4op_func)nfsd4_lockt,
1183 .op_name = "OP_LOCKT",
1184 },
1185 [OP_LOCKU] = {
1186 .op_func = (nfsd4op_func)nfsd4_locku,
1187 .op_name = "OP_LOCKU",
1188 },
1189 [OP_LOOKUP] = {
1190 .op_func = (nfsd4op_func)nfsd4_lookup,
1191 .op_name = "OP_LOOKUP",
1192 },
1193 [OP_LOOKUPP] = {
1194 .op_func = (nfsd4op_func)nfsd4_lookupp,
1195 .op_name = "OP_LOOKUPP",
1196 },
1197 [OP_NVERIFY] = {
1198 .op_func = (nfsd4op_func)nfsd4_nverify,
1199 .op_name = "OP_NVERIFY",
1200 },
1201 [OP_OPEN] = {
1202 .op_func = (nfsd4op_func)nfsd4_open,
1203 .op_name = "OP_OPEN",
1204 },
1205 [OP_OPEN_CONFIRM] = {
1206 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1207 .op_name = "OP_OPEN_CONFIRM",
1208 },
1209 [OP_OPEN_DOWNGRADE] = {
1210 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1211 .op_name = "OP_OPEN_DOWNGRADE",
1212 },
1213 [OP_PUTFH] = {
1214 .op_func = (nfsd4op_func)nfsd4_putfh,
1215 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1216 .op_name = "OP_PUTFH",
1217 },
1218 [OP_PUTPUBFH] = {
1219 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1220 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1221 .op_name = "OP_PUTPUBFH",
1222 },
1223 [OP_PUTROOTFH] = {
1224 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1225 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1226 .op_name = "OP_PUTROOTFH",
1227 },
1228 [OP_READ] = {
1229 .op_func = (nfsd4op_func)nfsd4_read,
1230 .op_name = "OP_READ",
1231 },
1232 [OP_READDIR] = {
1233 .op_func = (nfsd4op_func)nfsd4_readdir,
1234 .op_name = "OP_READDIR",
1235 },
1236 [OP_READLINK] = {
1237 .op_func = (nfsd4op_func)nfsd4_readlink,
1238 .op_name = "OP_READLINK",
1239 },
1240 [OP_REMOVE] = {
1241 .op_func = (nfsd4op_func)nfsd4_remove,
1242 .op_name = "OP_REMOVE",
1243 },
1244 [OP_RENAME] = {
1245 .op_name = "OP_RENAME",
1246 .op_func = (nfsd4op_func)nfsd4_rename,
1247 },
1248 [OP_RENEW] = {
1249 .op_func = (nfsd4op_func)nfsd4_renew,
1250 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1251 .op_name = "OP_RENEW",
1252 },
1253 [OP_RESTOREFH] = {
1254 .op_func = (nfsd4op_func)nfsd4_restorefh,
1255 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1256 .op_name = "OP_RESTOREFH",
1257 },
1258 [OP_SAVEFH] = {
1259 .op_func = (nfsd4op_func)nfsd4_savefh,
1260 .op_name = "OP_SAVEFH",
1261 },
1262 [OP_SECINFO] = {
1263 .op_func = (nfsd4op_func)nfsd4_secinfo,
1264 .op_name = "OP_SECINFO",
1265 },
1266 [OP_SETATTR] = {
1267 .op_func = (nfsd4op_func)nfsd4_setattr,
1268 .op_name = "OP_SETATTR",
1269 },
1270 [OP_SETCLIENTID] = {
1271 .op_func = (nfsd4op_func)nfsd4_setclientid,
1272 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1273 .op_name = "OP_SETCLIENTID",
1274 },
1275 [OP_SETCLIENTID_CONFIRM] = {
1276 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1277 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1278 .op_name = "OP_SETCLIENTID_CONFIRM",
1279 },
1280 [OP_VERIFY] = {
1281 .op_func = (nfsd4op_func)nfsd4_verify,
1282 .op_name = "OP_VERIFY",
1283 },
1284 [OP_WRITE] = {
1285 .op_func = (nfsd4op_func)nfsd4_write,
1286 .op_name = "OP_WRITE",
1287 },
1288 [OP_RELEASE_LOCKOWNER] = {
1289 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1290 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1291 .op_name = "OP_RELEASE_LOCKOWNER",
1292 },
1293
1294 /* NFSv4.1 operations */
1295 [OP_EXCHANGE_ID] = {
1296 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1298 .op_name = "OP_EXCHANGE_ID",
1299 },
1300 [OP_CREATE_SESSION] = {
1301 .op_func = (nfsd4op_func)nfsd4_create_session,
1302 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1303 .op_name = "OP_CREATE_SESSION",
1304 },
1305 [OP_DESTROY_SESSION] = {
1306 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1307 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1308 .op_name = "OP_DESTROY_SESSION",
1309 },
1310 [OP_SEQUENCE] = {
1311 .op_func = (nfsd4op_func)nfsd4_sequence,
1312 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1313 .op_name = "OP_SEQUENCE",
1314 },
1315 [OP_RECLAIM_COMPLETE] = {
1316 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1317 .op_flags = ALLOWED_WITHOUT_FH,
1318 .op_name = "OP_RECLAIM_COMPLETE",
1319 },
1320 };
1321
1322 static const char *nfsd4_op_name(unsigned opnum)
1323 {
1324 if (opnum < ARRAY_SIZE(nfsd4_ops))
1325 return nfsd4_ops[opnum].op_name;
1326 return "unknown_operation";
1327 }
1328
1329 #define nfsd4_voidres nfsd4_voidargs
1330 struct nfsd4_voidargs { int dummy; };
1331
1332 /*
1333 * TODO: At the present time, the NFSv4 server does not do XID caching
1334 * of requests. Implementing XID caching would not be a serious problem,
1335 * although it would require a mild change in interfaces since one
1336 * doesn't know whether an NFSv4 request is idempotent until after the
1337 * XDR decode. However, XID caching totally confuses pynfs (Peter
1338 * Astrand's regression testsuite for NFSv4 servers), which reuses
1339 * XID's liberally, so I've left it unimplemented until pynfs generates
1340 * better XID's.
1341 */
1342 static struct svc_procedure nfsd_procedures4[2] = {
1343 [NFSPROC4_NULL] = {
1344 .pc_func = (svc_procfunc) nfsd4_proc_null,
1345 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1346 .pc_argsize = sizeof(struct nfsd4_voidargs),
1347 .pc_ressize = sizeof(struct nfsd4_voidres),
1348 .pc_cachetype = RC_NOCACHE,
1349 .pc_xdrressize = 1,
1350 },
1351 [NFSPROC4_COMPOUND] = {
1352 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1353 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1354 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1355 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1356 .pc_ressize = sizeof(struct nfsd4_compoundres),
1357 .pc_cachetype = RC_NOCACHE,
1358 .pc_xdrressize = NFSD_BUFSIZE/4,
1359 },
1360 };
1361
1362 struct svc_version nfsd_version4 = {
1363 .vs_vers = 4,
1364 .vs_nproc = 2,
1365 .vs_proc = nfsd_procedures4,
1366 .vs_dispatch = nfsd_dispatch,
1367 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1368 };
1369
1370 /*
1371 * Local variables:
1372 * c-basic-offset: 8
1373 * End:
1374 */
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