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Add linux-next specific files for 20110716
[linux-2.6/next.git] / fs / nfsd / nfs4proc.c
blob121fd84e7f9074644a55c55311b38e658117e6e0
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 except EXCLUSIVE4_1.
200 */
201 status = do_nfsd_create(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 /*
295 * RFC5661 18.51.3
296 * Before RECLAIM_COMPLETE done, server should deny new lock
297 */
298 if (nfsd4_has_session(cstate) &&
299 !cstate->session->se_client->cl_firststate &&
300 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
301 return nfserr_grace;
302
303 if (nfsd4_has_session(cstate))
304 copy_clientid(&open->op_clientid, cstate->session);
305
306 nfs4_lock_state();
307
308 /* check seqid for replay. set nfs4_owner */
309 resp = rqstp->rq_resp;
310 status = nfsd4_process_open1(&resp->cstate, open);
311 if (status == nfserr_replay_me) {
312 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
313 fh_put(&cstate->current_fh);
314 fh_copy_shallow(&cstate->current_fh.fh_handle,
315 &rp->rp_openfh);
316 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
317 if (status)
318 dprintk("nfsd4_open: replay failed"
319 " restoring previous filehandle\n");
320 else
321 status = nfserr_replay_me;
322 }
323 if (status)
324 goto out;
325
326 status = nfsd4_check_open_attributes(rqstp, cstate, open);
327 if (status)
328 goto out;
329
330 /* Openowner is now set, so sequence id will get bumped. Now we need
331 * these checks before we do any creates: */
332 status = nfserr_grace;
333 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
334 goto out;
335 status = nfserr_no_grace;
336 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
337 goto out;
338
339 switch (open->op_claim_type) {
340 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
341 case NFS4_OPEN_CLAIM_NULL:
342 /*
343 * (1) set CURRENT_FH to the file being opened,
344 * creating it if necessary, (2) set open->op_cinfo,
345 * (3) set open->op_truncate if the file is to be
346 * truncated after opening, (4) do permission checking.
347 */
348 status = do_open_lookup(rqstp, &cstate->current_fh,
349 open);
350 if (status)
351 goto out;
352 break;
353 case NFS4_OPEN_CLAIM_PREVIOUS:
354 open->op_stateowner->so_confirmed = 1;
355 /*
356 * The CURRENT_FH is already set to the file being
357 * opened. (1) set open->op_cinfo, (2) set
358 * open->op_truncate if the file is to be truncated
359 * after opening, (3) do permission checking.
360 */
361 status = do_open_fhandle(rqstp, &cstate->current_fh,
362 open);
363 if (status)
364 goto out;
365 break;
366 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
367 open->op_stateowner->so_confirmed = 1;
368 dprintk("NFSD: unsupported OPEN claim type %d\n",
369 open->op_claim_type);
370 status = nfserr_notsupp;
371 goto out;
372 default:
373 dprintk("NFSD: Invalid OPEN claim type %d\n",
374 open->op_claim_type);
375 status = nfserr_inval;
376 goto out;
377 }
378 /*
379 * nfsd4_process_open2() does the actual opening of the file. If
380 * successful, it (1) truncates the file if open->op_truncate was
381 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
382 */
383 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
384 out:
385 if (open->op_stateowner) {
386 nfs4_get_stateowner(open->op_stateowner);
387 cstate->replay_owner = open->op_stateowner;
388 }
389 nfs4_unlock_state();
390 return status;
391 }
392
393 /*
394 * filehandle-manipulating ops.
395 */
396 static __be32
397 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
398 struct svc_fh **getfh)
399 {
400 if (!cstate->current_fh.fh_dentry)
401 return nfserr_nofilehandle;
402
403 *getfh = &cstate->current_fh;
404 return nfs_ok;
405 }
406
407 static __be32
408 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
409 struct nfsd4_putfh *putfh)
410 {
411 fh_put(&cstate->current_fh);
412 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
413 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
414 putfh->pf_fhlen);
415 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
416 }
417
418 static __be32
419 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
420 void *arg)
421 {
422 __be32 status;
423
424 fh_put(&cstate->current_fh);
425 status = exp_pseudoroot(rqstp, &cstate->current_fh);
426 return status;
427 }
428
429 static __be32
430 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
431 void *arg)
432 {
433 if (!cstate->save_fh.fh_dentry)
434 return nfserr_restorefh;
435
436 fh_dup2(&cstate->current_fh, &cstate->save_fh);
437 return nfs_ok;
438 }
439
440 static __be32
441 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
442 void *arg)
443 {
444 if (!cstate->current_fh.fh_dentry)
445 return nfserr_nofilehandle;
446
447 fh_dup2(&cstate->save_fh, &cstate->current_fh);
448 return nfs_ok;
449 }
450
451 /*
452 * misc nfsv4 ops
453 */
454 static __be32
455 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
456 struct nfsd4_access *access)
457 {
458 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
459 return nfserr_inval;
460
461 access->ac_resp_access = access->ac_req_access;
462 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
463 &access->ac_supported);
464 }
465
466 static __be32
467 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
468 struct nfsd4_commit *commit)
469 {
470 __be32 status;
471
472 u32 *p = (u32 *)commit->co_verf.data;
473 *p++ = nfssvc_boot.tv_sec;
474 *p++ = nfssvc_boot.tv_usec;
475
476 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
477 commit->co_count);
478 if (status == nfserr_symlink)
479 status = nfserr_inval;
480 return status;
481 }
482
483 static __be32
484 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
485 struct nfsd4_create *create)
486 {
487 struct svc_fh resfh;
488 __be32 status;
489 dev_t rdev;
490
491 fh_init(&resfh, NFS4_FHSIZE);
492
493 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
494 NFSD_MAY_CREATE);
495 if (status == nfserr_symlink)
496 status = nfserr_notdir;
497 if (status)
498 return status;
499
500 status = check_attr_support(rqstp, cstate, create->cr_bmval,
501 nfsd_attrmask);
502 if (status)
503 return status;
504
505 switch (create->cr_type) {
506 case NF4LNK:
507 /* ugh! we have to null-terminate the linktext, or
508 * vfs_symlink() will choke. it is always safe to
509 * null-terminate by brute force, since at worst we
510 * will overwrite the first byte of the create namelen
511 * in the XDR buffer, which has already been extracted
512 * during XDR decode.
513 */
514 create->cr_linkname[create->cr_linklen] = 0;
515
516 status = nfsd_symlink(rqstp, &cstate->current_fh,
517 create->cr_name, create->cr_namelen,
518 create->cr_linkname, create->cr_linklen,
519 &resfh, &create->cr_iattr);
520 break;
521
522 case NF4BLK:
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_IFBLK, rdev, &resfh);
530 break;
531
532 case NF4CHR:
533 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
534 if (MAJOR(rdev) != create->cr_specdata1 ||
535 MINOR(rdev) != create->cr_specdata2)
536 return nfserr_inval;
537 status = nfsd_create(rqstp, &cstate->current_fh,
538 create->cr_name, create->cr_namelen,
539 &create->cr_iattr,S_IFCHR, rdev, &resfh);
540 break;
541
542 case NF4SOCK:
543 status = nfsd_create(rqstp, &cstate->current_fh,
544 create->cr_name, create->cr_namelen,
545 &create->cr_iattr, S_IFSOCK, 0, &resfh);
546 break;
547
548 case NF4FIFO:
549 status = nfsd_create(rqstp, &cstate->current_fh,
550 create->cr_name, create->cr_namelen,
551 &create->cr_iattr, S_IFIFO, 0, &resfh);
552 break;
553
554 case NF4DIR:
555 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
556 status = nfsd_create(rqstp, &cstate->current_fh,
557 create->cr_name, create->cr_namelen,
558 &create->cr_iattr, S_IFDIR, 0, &resfh);
559 break;
560
561 default:
562 status = nfserr_badtype;
563 }
564
565 if (status)
566 goto out;
567
568 if (create->cr_acl != NULL)
569 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
570 create->cr_bmval);
571
572 fh_unlock(&cstate->current_fh);
573 set_change_info(&create->cr_cinfo, &cstate->current_fh);
574 fh_dup2(&cstate->current_fh, &resfh);
575 out:
576 fh_put(&resfh);
577 return status;
578 }
579
580 static __be32
581 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 struct nfsd4_getattr *getattr)
583 {
584 __be32 status;
585
586 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
587 if (status)
588 return status;
589
590 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
591 return nfserr_inval;
592
593 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
594 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
595 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
596
597 getattr->ga_fhp = &cstate->current_fh;
598 return nfs_ok;
599 }
600
601 static __be32
602 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
603 struct nfsd4_link *link)
604 {
605 __be32 status = nfserr_nofilehandle;
606
607 if (!cstate->save_fh.fh_dentry)
608 return status;
609 status = nfsd_link(rqstp, &cstate->current_fh,
610 link->li_name, link->li_namelen, &cstate->save_fh);
611 if (!status)
612 set_change_info(&link->li_cinfo, &cstate->current_fh);
613 return status;
614 }
615
616 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
617 {
618 struct svc_fh tmp_fh;
619 __be32 ret;
620
621 fh_init(&tmp_fh, NFS4_FHSIZE);
622 ret = exp_pseudoroot(rqstp, &tmp_fh);
623 if (ret)
624 return ret;
625 if (tmp_fh.fh_dentry == fh->fh_dentry) {
626 fh_put(&tmp_fh);
627 return nfserr_noent;
628 }
629 fh_put(&tmp_fh);
630 return nfsd_lookup(rqstp, fh, "..", 2, fh);
631 }
632
633 static __be32
634 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
635 void *arg)
636 {
637 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
638 }
639
640 static __be32
641 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
642 struct nfsd4_lookup *lookup)
643 {
644 return nfsd_lookup(rqstp, &cstate->current_fh,
645 lookup->lo_name, lookup->lo_len,
646 &cstate->current_fh);
647 }
648
649 static __be32
650 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
651 struct nfsd4_read *read)
652 {
653 __be32 status;
654
655 /* no need to check permission - this will be done in nfsd_read() */
656
657 read->rd_filp = NULL;
658 if (read->rd_offset >= OFFSET_MAX)
659 return nfserr_inval;
660
661 nfs4_lock_state();
662 /* check stateid */
663 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
664 RD_STATE, &read->rd_filp))) {
665 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
666 goto out;
667 }
668 if (read->rd_filp)
669 get_file(read->rd_filp);
670 status = nfs_ok;
671 out:
672 nfs4_unlock_state();
673 read->rd_rqstp = rqstp;
674 read->rd_fhp = &cstate->current_fh;
675 return status;
676 }
677
678 static __be32
679 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
680 struct nfsd4_readdir *readdir)
681 {
682 u64 cookie = readdir->rd_cookie;
683 static const nfs4_verifier zeroverf;
684
685 /* no need to check permission - this will be done in nfsd_readdir() */
686
687 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
688 return nfserr_inval;
689
690 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
691 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
692 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
693
694 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
695 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
696 return nfserr_bad_cookie;
697
698 readdir->rd_rqstp = rqstp;
699 readdir->rd_fhp = &cstate->current_fh;
700 return nfs_ok;
701 }
702
703 static __be32
704 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
705 struct nfsd4_readlink *readlink)
706 {
707 readlink->rl_rqstp = rqstp;
708 readlink->rl_fhp = &cstate->current_fh;
709 return nfs_ok;
710 }
711
712 static __be32
713 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
714 struct nfsd4_remove *remove)
715 {
716 __be32 status;
717
718 if (locks_in_grace())
719 return nfserr_grace;
720 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
721 remove->rm_name, remove->rm_namelen);
722 if (status == nfserr_symlink)
723 return nfserr_notdir;
724 if (!status) {
725 fh_unlock(&cstate->current_fh);
726 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
727 }
728 return status;
729 }
730
731 static __be32
732 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
733 struct nfsd4_rename *rename)
734 {
735 __be32 status = nfserr_nofilehandle;
736
737 if (!cstate->save_fh.fh_dentry)
738 return status;
739 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
740 & NFSEXP_NOSUBTREECHECK))
741 return nfserr_grace;
742 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
743 rename->rn_snamelen, &cstate->current_fh,
744 rename->rn_tname, rename->rn_tnamelen);
745
746 /* the underlying filesystem returns different error's than required
747 * by NFSv4. both save_fh and current_fh have been verified.. */
748 if (status == nfserr_isdir)
749 status = nfserr_exist;
750 else if ((status == nfserr_notdir) &&
751 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
752 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
753 status = nfserr_exist;
754 else if (status == nfserr_symlink)
755 status = nfserr_notdir;
756
757 if (!status) {
758 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
759 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
760 }
761 return status;
762 }
763
764 static __be32
765 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
766 struct nfsd4_secinfo *secinfo)
767 {
768 struct svc_fh resfh;
769 struct svc_export *exp;
770 struct dentry *dentry;
771 __be32 err;
772
773 fh_init(&resfh, NFS4_FHSIZE);
774 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
775 if (err)
776 return err;
777 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
778 secinfo->si_name, secinfo->si_namelen,
779 &exp, &dentry);
780 if (err)
781 return err;
782 if (dentry->d_inode == NULL) {
783 exp_put(exp);
784 err = nfserr_noent;
785 } else
786 secinfo->si_exp = exp;
787 dput(dentry);
788 if (cstate->minorversion)
789 /* See rfc 5661 section 2.6.3.1.1.8 */
790 fh_put(&cstate->current_fh);
791 return err;
792 }
793
794 static __be32
795 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
796 struct nfsd4_secinfo_no_name *sin)
797 {
798 __be32 err;
799
800 switch (sin->sin_style) {
801 case NFS4_SECINFO_STYLE4_CURRENT_FH:
802 break;
803 case NFS4_SECINFO_STYLE4_PARENT:
804 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
805 if (err)
806 return err;
807 break;
808 default:
809 return nfserr_inval;
810 }
811 exp_get(cstate->current_fh.fh_export);
812 sin->sin_exp = cstate->current_fh.fh_export;
813 fh_put(&cstate->current_fh);
814 return nfs_ok;
815 }
816
817 static __be32
818 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
819 struct nfsd4_setattr *setattr)
820 {
821 __be32 status = nfs_ok;
822
823 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
824 nfs4_lock_state();
825 status = nfs4_preprocess_stateid_op(cstate,
826 &setattr->sa_stateid, WR_STATE, NULL);
827 nfs4_unlock_state();
828 if (status) {
829 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
830 return status;
831 }
832 }
833 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
834 if (status)
835 return status;
836 status = nfs_ok;
837
838 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
839 nfsd_attrmask);
840 if (status)
841 goto out;
842
843 if (setattr->sa_acl != NULL)
844 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
845 setattr->sa_acl);
846 if (status)
847 goto out;
848 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
849 0, (time_t)0);
850 out:
851 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
852 return status;
853 }
854
855 static __be32
856 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
857 struct nfsd4_write *write)
858 {
859 stateid_t *stateid = &write->wr_stateid;
860 struct file *filp = NULL;
861 u32 *p;
862 __be32 status = nfs_ok;
863 unsigned long cnt;
864
865 /* no need to check permission - this will be done in nfsd_write() */
866
867 if (write->wr_offset >= OFFSET_MAX)
868 return nfserr_inval;
869
870 nfs4_lock_state();
871 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
872 if (filp)
873 get_file(filp);
874 nfs4_unlock_state();
875
876 if (status) {
877 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
878 return status;
879 }
880
881 cnt = write->wr_buflen;
882 write->wr_how_written = write->wr_stable_how;
883 p = (u32 *)write->wr_verifier.data;
884 *p++ = nfssvc_boot.tv_sec;
885 *p++ = nfssvc_boot.tv_usec;
886
887 status = nfsd_write(rqstp, &cstate->current_fh, filp,
888 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
889 &cnt, &write->wr_how_written);
890 if (filp)
891 fput(filp);
892
893 write->wr_bytes_written = cnt;
894
895 if (status == nfserr_symlink)
896 status = nfserr_inval;
897 return status;
898 }
899
900 /* This routine never returns NFS_OK! If there are no other errors, it
901 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
902 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
903 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
904 */
905 static __be32
906 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
907 struct nfsd4_verify *verify)
908 {
909 __be32 *buf, *p;
910 int count;
911 __be32 status;
912
913 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
914 if (status)
915 return status;
916
917 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
918 if (status)
919 return status;
920
921 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
922 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
923 return nfserr_inval;
924 if (verify->ve_attrlen & 3)
925 return nfserr_inval;
926
927 /* count in words:
928 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
929 */
930 count = 4 + (verify->ve_attrlen >> 2);
931 buf = kmalloc(count << 2, GFP_KERNEL);
932 if (!buf)
933 return nfserr_resource;
934
935 status = nfsd4_encode_fattr(&cstate->current_fh,
936 cstate->current_fh.fh_export,
937 cstate->current_fh.fh_dentry, buf,
938 &count, verify->ve_bmval,
939 rqstp, 0);
940
941 /* this means that nfsd4_encode_fattr() ran out of space */
942 if (status == nfserr_resource && count == 0)
943 status = nfserr_not_same;
944 if (status)
945 goto out_kfree;
946
947 /* skip bitmap */
948 p = buf + 1 + ntohl(buf[0]);
949 status = nfserr_not_same;
950 if (ntohl(*p++) != verify->ve_attrlen)
951 goto out_kfree;
952 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
953 status = nfserr_same;
954
955 out_kfree:
956 kfree(buf);
957 return status;
958 }
959
960 static __be32
961 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
962 struct nfsd4_verify *verify)
963 {
964 __be32 status;
965
966 status = _nfsd4_verify(rqstp, cstate, verify);
967 return status == nfserr_not_same ? nfs_ok : status;
968 }
969
970 static __be32
971 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
972 struct nfsd4_verify *verify)
973 {
974 __be32 status;
975
976 status = _nfsd4_verify(rqstp, cstate, verify);
977 return status == nfserr_same ? nfs_ok : status;
978 }
979
980 /*
981 * NULL call.
982 */
983 static __be32
984 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
985 {
986 return nfs_ok;
987 }
988
989 static inline void nfsd4_increment_op_stats(u32 opnum)
990 {
991 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
992 nfsdstats.nfs4_opcount[opnum]++;
993 }
994
995 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
996 void *);
997 enum nfsd4_op_flags {
998 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
999 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1000 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1001 /* For rfc 5661 section 2.6.3.1.1: */
1002 OP_HANDLES_WRONGSEC = 1 << 3,
1003 OP_IS_PUTFH_LIKE = 1 << 4,
1004 };
1005
1006 struct nfsd4_operation {
1007 nfsd4op_func op_func;
1008 u32 op_flags;
1009 char *op_name;
1010 };
1011
1012 static struct nfsd4_operation nfsd4_ops[];
1013
1014 static const char *nfsd4_op_name(unsigned opnum);
1015
1016 /*
1017 * Enforce NFSv4.1 COMPOUND ordering rules:
1018 *
1019 * Also note, enforced elsewhere:
1020 * - SEQUENCE other than as first op results in
1021 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1022 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1023 * (Enforced in nfsd4_bind_conn_to_session().)
1024 * - DESTROY_SESSION must be the final operation in a compound, if
1025 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1026 * (Enforced in nfsd4_destroy_session().)
1027 */
1028 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1029 {
1030 struct nfsd4_op *op = &args->ops[0];
1031
1032 /* These ordering requirements don't apply to NFSv4.0: */
1033 if (args->minorversion == 0)
1034 return nfs_ok;
1035 /* This is weird, but OK, not our problem: */
1036 if (args->opcnt == 0)
1037 return nfs_ok;
1038 if (op->status == nfserr_op_illegal)
1039 return nfs_ok;
1040 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1041 return nfserr_op_not_in_session;
1042 if (op->opnum == OP_SEQUENCE)
1043 return nfs_ok;
1044 if (args->opcnt != 1)
1045 return nfserr_not_only_op;
1046 return nfs_ok;
1047 }
1048
1049 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1050 {
1051 return &nfsd4_ops[op->opnum];
1052 }
1053
1054 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1055 {
1056 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1057 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1058 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1059 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1060 struct nfsd4_operation *thisd;
1061 struct nfsd4_operation *nextd;
1062
1063 thisd = OPDESC(this);
1064 /*
1065 * Most ops check wronsec on our own; only the putfh-like ops
1066 * have special rules.
1067 */
1068 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1069 return false;
1070 /*
1071 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1072 * put-filehandle operation if we're not going to use the
1073 * result:
1074 */
1075 if (argp->opcnt == resp->opcnt)
1076 return false;
1077
1078 nextd = OPDESC(next);
1079 /*
1080 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1081 * errors themselves as necessary; others should check for them
1082 * now:
1083 */
1084 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1085 }
1086
1087 /*
1088 * COMPOUND call.
1089 */
1090 static __be32
1091 nfsd4_proc_compound(struct svc_rqst *rqstp,
1092 struct nfsd4_compoundargs *args,
1093 struct nfsd4_compoundres *resp)
1094 {
1095 struct nfsd4_op *op;
1096 struct nfsd4_operation *opdesc;
1097 struct nfsd4_compound_state *cstate = &resp->cstate;
1098 int slack_bytes;
1099 __be32 status;
1100
1101 resp->xbuf = &rqstp->rq_res;
1102 resp->p = rqstp->rq_res.head[0].iov_base +
1103 rqstp->rq_res.head[0].iov_len;
1104 resp->tagp = resp->p;
1105 /* reserve space for: taglen, tag, and opcnt */
1106 resp->p += 2 + XDR_QUADLEN(args->taglen);
1107 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1108 resp->taglen = args->taglen;
1109 resp->tag = args->tag;
1110 resp->opcnt = 0;
1111 resp->rqstp = rqstp;
1112 resp->cstate.minorversion = args->minorversion;
1113 resp->cstate.replay_owner = NULL;
1114 resp->cstate.session = NULL;
1115 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1116 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1117 /*
1118 * Don't use the deferral mechanism for NFSv4; compounds make it
1119 * too hard to avoid non-idempotency problems.
1120 */
1121 rqstp->rq_usedeferral = 0;
1122
1123 /*
1124 * According to RFC3010, this takes precedence over all other errors.
1125 */
1126 status = nfserr_minor_vers_mismatch;
1127 if (args->minorversion > nfsd_supported_minorversion)
1128 goto out;
1129
1130 status = nfs41_check_op_ordering(args);
1131 if (status) {
1132 op = &args->ops[0];
1133 op->status = status;
1134 goto encode_op;
1135 }
1136
1137 while (!status && resp->opcnt < args->opcnt) {
1138 op = &args->ops[resp->opcnt++];
1139
1140 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1141 resp->opcnt, args->opcnt, op->opnum,
1142 nfsd4_op_name(op->opnum));
1143 /*
1144 * The XDR decode routines may have pre-set op->status;
1145 * for example, if there is a miscellaneous XDR error
1146 * it will be set to nfserr_bad_xdr.
1147 */
1148 if (op->status)
1149 goto encode_op;
1150
1151 /* We must be able to encode a successful response to
1152 * this operation, with enough room left over to encode a
1153 * failed response to the next operation. If we don't
1154 * have enough room, fail with ERR_RESOURCE.
1155 */
1156 slack_bytes = (char *)resp->end - (char *)resp->p;
1157 if (slack_bytes < COMPOUND_SLACK_SPACE
1158 + COMPOUND_ERR_SLACK_SPACE) {
1159 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1160 op->status = nfserr_resource;
1161 goto encode_op;
1162 }
1163
1164 opdesc = OPDESC(op);
1165
1166 if (!cstate->current_fh.fh_dentry) {
1167 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1168 op->status = nfserr_nofilehandle;
1169 goto encode_op;
1170 }
1171 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1172 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1173 op->status = nfserr_moved;
1174 goto encode_op;
1175 }
1176
1177 if (opdesc->op_func)
1178 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1179 else
1180 BUG_ON(op->status == nfs_ok);
1181
1182 if (!op->status && need_wrongsec_check(rqstp))
1183 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1184
1185 encode_op:
1186 /* Only from SEQUENCE */
1187 if (resp->cstate.status == nfserr_replay_cache) {
1188 dprintk("%s NFS4.1 replay from cache\n", __func__);
1189 status = op->status;
1190 goto out;
1191 }
1192 if (op->status == nfserr_replay_me) {
1193 op->replay = &cstate->replay_owner->so_replay;
1194 nfsd4_encode_replay(resp, op);
1195 status = op->status = op->replay->rp_status;
1196 } else {
1197 nfsd4_encode_operation(resp, op);
1198 status = op->status;
1199 }
1200
1201 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1202 args->ops, args->opcnt, resp->opcnt, op->opnum,
1203 be32_to_cpu(status));
1204
1205 if (cstate->replay_owner) {
1206 nfs4_put_stateowner(cstate->replay_owner);
1207 cstate->replay_owner = NULL;
1208 }
1209 /* XXX Ugh, we need to get rid of this kind of special case: */
1210 if (op->opnum == OP_READ && op->u.read.rd_filp)
1211 fput(op->u.read.rd_filp);
1212
1213 nfsd4_increment_op_stats(op->opnum);
1214 }
1215
1216 resp->cstate.status = status;
1217 fh_put(&resp->cstate.current_fh);
1218 fh_put(&resp->cstate.save_fh);
1219 BUG_ON(resp->cstate.replay_owner);
1220 out:
1221 nfsd4_release_compoundargs(args);
1222 /* Reset deferral mechanism for RPC deferrals */
1223 rqstp->rq_usedeferral = 1;
1224 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1225 return status;
1226 }
1227
1228 static struct nfsd4_operation nfsd4_ops[] = {
1229 [OP_ACCESS] = {
1230 .op_func = (nfsd4op_func)nfsd4_access,
1231 .op_name = "OP_ACCESS",
1232 },
1233 [OP_CLOSE] = {
1234 .op_func = (nfsd4op_func)nfsd4_close,
1235 .op_name = "OP_CLOSE",
1236 },
1237 [OP_COMMIT] = {
1238 .op_func = (nfsd4op_func)nfsd4_commit,
1239 .op_name = "OP_COMMIT",
1240 },
1241 [OP_CREATE] = {
1242 .op_func = (nfsd4op_func)nfsd4_create,
1243 .op_name = "OP_CREATE",
1244 },
1245 [OP_DELEGRETURN] = {
1246 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1247 .op_name = "OP_DELEGRETURN",
1248 },
1249 [OP_GETATTR] = {
1250 .op_func = (nfsd4op_func)nfsd4_getattr,
1251 .op_flags = ALLOWED_ON_ABSENT_FS,
1252 .op_name = "OP_GETATTR",
1253 },
1254 [OP_GETFH] = {
1255 .op_func = (nfsd4op_func)nfsd4_getfh,
1256 .op_name = "OP_GETFH",
1257 },
1258 [OP_LINK] = {
1259 .op_func = (nfsd4op_func)nfsd4_link,
1260 .op_name = "OP_LINK",
1261 },
1262 [OP_LOCK] = {
1263 .op_func = (nfsd4op_func)nfsd4_lock,
1264 .op_name = "OP_LOCK",
1265 },
1266 [OP_LOCKT] = {
1267 .op_func = (nfsd4op_func)nfsd4_lockt,
1268 .op_name = "OP_LOCKT",
1269 },
1270 [OP_LOCKU] = {
1271 .op_func = (nfsd4op_func)nfsd4_locku,
1272 .op_name = "OP_LOCKU",
1273 },
1274 [OP_LOOKUP] = {
1275 .op_func = (nfsd4op_func)nfsd4_lookup,
1276 .op_flags = OP_HANDLES_WRONGSEC,
1277 .op_name = "OP_LOOKUP",
1278 },
1279 [OP_LOOKUPP] = {
1280 .op_func = (nfsd4op_func)nfsd4_lookupp,
1281 .op_flags = OP_HANDLES_WRONGSEC,
1282 .op_name = "OP_LOOKUPP",
1283 },
1284 [OP_NVERIFY] = {
1285 .op_func = (nfsd4op_func)nfsd4_nverify,
1286 .op_name = "OP_NVERIFY",
1287 },
1288 [OP_OPEN] = {
1289 .op_func = (nfsd4op_func)nfsd4_open,
1290 .op_flags = OP_HANDLES_WRONGSEC,
1291 .op_name = "OP_OPEN",
1292 },
1293 [OP_OPEN_CONFIRM] = {
1294 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1295 .op_name = "OP_OPEN_CONFIRM",
1296 },
1297 [OP_OPEN_DOWNGRADE] = {
1298 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1299 .op_name = "OP_OPEN_DOWNGRADE",
1300 },
1301 [OP_PUTFH] = {
1302 .op_func = (nfsd4op_func)nfsd4_putfh,
1303 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1304 | OP_IS_PUTFH_LIKE,
1305 .op_name = "OP_PUTFH",
1306 },
1307 [OP_PUTPUBFH] = {
1308 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1309 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1310 | OP_IS_PUTFH_LIKE,
1311 .op_name = "OP_PUTPUBFH",
1312 },
1313 [OP_PUTROOTFH] = {
1314 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1315 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1316 | OP_IS_PUTFH_LIKE,
1317 .op_name = "OP_PUTROOTFH",
1318 },
1319 [OP_READ] = {
1320 .op_func = (nfsd4op_func)nfsd4_read,
1321 .op_name = "OP_READ",
1322 },
1323 [OP_READDIR] = {
1324 .op_func = (nfsd4op_func)nfsd4_readdir,
1325 .op_name = "OP_READDIR",
1326 },
1327 [OP_READLINK] = {
1328 .op_func = (nfsd4op_func)nfsd4_readlink,
1329 .op_name = "OP_READLINK",
1330 },
1331 [OP_REMOVE] = {
1332 .op_func = (nfsd4op_func)nfsd4_remove,
1333 .op_name = "OP_REMOVE",
1334 },
1335 [OP_RENAME] = {
1336 .op_name = "OP_RENAME",
1337 .op_func = (nfsd4op_func)nfsd4_rename,
1338 },
1339 [OP_RENEW] = {
1340 .op_func = (nfsd4op_func)nfsd4_renew,
1341 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1342 .op_name = "OP_RENEW",
1343 },
1344 [OP_RESTOREFH] = {
1345 .op_func = (nfsd4op_func)nfsd4_restorefh,
1346 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1347 | OP_IS_PUTFH_LIKE,
1348 .op_name = "OP_RESTOREFH",
1349 },
1350 [OP_SAVEFH] = {
1351 .op_func = (nfsd4op_func)nfsd4_savefh,
1352 .op_flags = OP_HANDLES_WRONGSEC,
1353 .op_name = "OP_SAVEFH",
1354 },
1355 [OP_SECINFO] = {
1356 .op_func = (nfsd4op_func)nfsd4_secinfo,
1357 .op_flags = OP_HANDLES_WRONGSEC,
1358 .op_name = "OP_SECINFO",
1359 },
1360 [OP_SETATTR] = {
1361 .op_func = (nfsd4op_func)nfsd4_setattr,
1362 .op_name = "OP_SETATTR",
1363 },
1364 [OP_SETCLIENTID] = {
1365 .op_func = (nfsd4op_func)nfsd4_setclientid,
1366 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1367 .op_name = "OP_SETCLIENTID",
1368 },
1369 [OP_SETCLIENTID_CONFIRM] = {
1370 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1371 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1372 .op_name = "OP_SETCLIENTID_CONFIRM",
1373 },
1374 [OP_VERIFY] = {
1375 .op_func = (nfsd4op_func)nfsd4_verify,
1376 .op_name = "OP_VERIFY",
1377 },
1378 [OP_WRITE] = {
1379 .op_func = (nfsd4op_func)nfsd4_write,
1380 .op_name = "OP_WRITE",
1381 },
1382 [OP_RELEASE_LOCKOWNER] = {
1383 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1384 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1385 .op_name = "OP_RELEASE_LOCKOWNER",
1386 },
1387
1388 /* NFSv4.1 operations */
1389 [OP_EXCHANGE_ID] = {
1390 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1391 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1392 .op_name = "OP_EXCHANGE_ID",
1393 },
1394 [OP_BIND_CONN_TO_SESSION] = {
1395 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1396 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1397 .op_name = "OP_BIND_CONN_TO_SESSION",
1398 },
1399 [OP_CREATE_SESSION] = {
1400 .op_func = (nfsd4op_func)nfsd4_create_session,
1401 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1402 .op_name = "OP_CREATE_SESSION",
1403 },
1404 [OP_DESTROY_SESSION] = {
1405 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1406 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1407 .op_name = "OP_DESTROY_SESSION",
1408 },
1409 [OP_SEQUENCE] = {
1410 .op_func = (nfsd4op_func)nfsd4_sequence,
1411 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1412 .op_name = "OP_SEQUENCE",
1413 },
1414 [OP_DESTROY_CLIENTID] = {
1415 .op_func = NULL,
1416 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1417 .op_name = "OP_DESTROY_CLIENTID",
1418 },
1419 [OP_RECLAIM_COMPLETE] = {
1420 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1421 .op_flags = ALLOWED_WITHOUT_FH,
1422 .op_name = "OP_RECLAIM_COMPLETE",
1423 },
1424 [OP_SECINFO_NO_NAME] = {
1425 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1426 .op_flags = OP_HANDLES_WRONGSEC,
1427 .op_name = "OP_SECINFO_NO_NAME",
1428 },
1429 [OP_TEST_STATEID] = {
1430 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1431 .op_flags = ALLOWED_WITHOUT_FH,
1432 .op_name = "OP_TEST_STATEID",
1433 },
1434 [OP_FREE_STATEID] = {
1435 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1436 .op_flags = ALLOWED_WITHOUT_FH,
1437 .op_name = "OP_FREE_STATEID",
1438 },
1439 };
1440
1441 static const char *nfsd4_op_name(unsigned opnum)
1442 {
1443 if (opnum < ARRAY_SIZE(nfsd4_ops))
1444 return nfsd4_ops[opnum].op_name;
1445 return "unknown_operation";
1446 }
1447
1448 #define nfsd4_voidres nfsd4_voidargs
1449 struct nfsd4_voidargs { int dummy; };
1450
1451 /*
1452 * TODO: At the present time, the NFSv4 server does not do XID caching
1453 * of requests. Implementing XID caching would not be a serious problem,
1454 * although it would require a mild change in interfaces since one
1455 * doesn't know whether an NFSv4 request is idempotent until after the
1456 * XDR decode. However, XID caching totally confuses pynfs (Peter
1457 * Astrand's regression testsuite for NFSv4 servers), which reuses
1458 * XID's liberally, so I've left it unimplemented until pynfs generates
1459 * better XID's.
1460 */
1461 static struct svc_procedure nfsd_procedures4[2] = {
1462 [NFSPROC4_NULL] = {
1463 .pc_func = (svc_procfunc) nfsd4_proc_null,
1464 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1465 .pc_argsize = sizeof(struct nfsd4_voidargs),
1466 .pc_ressize = sizeof(struct nfsd4_voidres),
1467 .pc_cachetype = RC_NOCACHE,
1468 .pc_xdrressize = 1,
1469 },
1470 [NFSPROC4_COMPOUND] = {
1471 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1472 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1473 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1474 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1475 .pc_ressize = sizeof(struct nfsd4_compoundres),
1476 .pc_cachetype = RC_NOCACHE,
1477 .pc_xdrressize = NFSD_BUFSIZE/4,
1478 },
1479 };
1480
1481 struct svc_version nfsd_version4 = {
1482 .vs_vers = 4,
1483 .vs_nproc = 2,
1484 .vs_proc = nfsd_procedures4,
1485 .vs_dispatch = nfsd_dispatch,
1486 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1487 };
1488
1489 /*
1490 * Local variables:
1491 * c-basic-offset: 8
1492 * End:
1493 */
linux-next