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ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / fs / nfsd / nfs4proc.c
blobd06a02c1b1a3d9135749ca655687097dbab0ef88
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 accmode |= NFSD_MAY_READ_IF_EXEC;
160
161 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
162 accmode |= NFSD_MAY_READ;
163 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
164 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
165 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
166 accmode |= NFSD_MAY_WRITE;
167
168 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
169
170 return status;
171 }
172
173 static __be32
174 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
175 {
176 struct svc_fh resfh;
177 __be32 status;
178 int created = 0;
179
180 fh_init(&resfh, NFS4_FHSIZE);
181 open->op_truncate = 0;
182
183 if (open->op_create) {
184 /* FIXME: check session persistence and pnfs flags.
185 * The nfsv4.1 spec requires the following semantics:
186 *
187 * Persistent | pNFS | Server REQUIRED | Client Allowed
188 * Reply Cache | server | |
189 * -------------+--------+-----------------+--------------------
190 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
191 * | | | (SHOULD)
192 * | | and EXCLUSIVE4 | or EXCLUSIVE4
193 * | | | (SHOULD NOT)
194 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
195 * yes | no | GUARDED4 | GUARDED4
196 * yes | yes | GUARDED4 | GUARDED4
197 */
198
199 /*
200 * Note: create modes (UNCHECKED,GUARDED...) are the same
201 * in NFSv4 as in v3 except EXCLUSIVE4_1.
202 */
203 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
204 open->op_fname.len, &open->op_iattr,
205 &resfh, open->op_createmode,
206 (u32 *)open->op_verf.data,
207 &open->op_truncate, &created);
208
209 /*
210 * Following rfc 3530 14.2.16, use the returned bitmask
211 * to indicate which attributes we used to store the
212 * verifier:
213 */
214 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
215 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
216 FATTR4_WORD1_TIME_MODIFY);
217 } else {
218 status = nfsd_lookup(rqstp, current_fh,
219 open->op_fname.data, open->op_fname.len, &resfh);
220 fh_unlock(current_fh);
221 }
222 if (status)
223 goto out;
224
225 if (is_create_with_attrs(open) && open->op_acl != NULL)
226 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
227
228 set_change_info(&open->op_cinfo, current_fh);
229 fh_dup2(current_fh, &resfh);
230
231 /* set reply cache */
232 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
233 &resfh.fh_handle);
234 if (!created)
235 status = do_open_permission(rqstp, current_fh, open,
236 NFSD_MAY_NOP);
237
238 out:
239 fh_put(&resfh);
240 return status;
241 }
242
243 static __be32
244 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
245 {
246 __be32 status;
247
248 /* Only reclaims from previously confirmed clients are valid */
249 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
250 return status;
251
252 /* We don't know the target directory, and therefore can not
253 * set the change info
254 */
255
256 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
257
258 /* set replay cache */
259 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
260 &current_fh->fh_handle);
261
262 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
263 (open->op_iattr.ia_size == 0);
264
265 status = do_open_permission(rqstp, current_fh, open,
266 NFSD_MAY_OWNER_OVERRIDE);
267
268 return status;
269 }
270
271 static void
272 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
273 {
274 struct nfsd4_sessionid *sid =
275 (struct nfsd4_sessionid *)session->se_sessionid.data;
276
277 clid->cl_boot = sid->clientid.cl_boot;
278 clid->cl_id = sid->clientid.cl_id;
279 }
280
281 static __be32
282 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
283 struct nfsd4_open *open)
284 {
285 __be32 status;
286 struct nfsd4_compoundres *resp;
287
288 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
289 (int)open->op_fname.len, open->op_fname.data,
290 open->op_stateowner);
291
292 /* This check required by spec. */
293 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
294 return nfserr_inval;
295
296 if (nfsd4_has_session(cstate))
297 copy_clientid(&open->op_clientid, cstate->session);
298
299 nfs4_lock_state();
300
301 /* check seqid for replay. set nfs4_owner */
302 resp = rqstp->rq_resp;
303 status = nfsd4_process_open1(&resp->cstate, open);
304 if (status == nfserr_replay_me) {
305 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
306 fh_put(&cstate->current_fh);
307 fh_copy_shallow(&cstate->current_fh.fh_handle,
308 &rp->rp_openfh);
309 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
310 if (status)
311 dprintk("nfsd4_open: replay failed"
312 " restoring previous filehandle\n");
313 else
314 status = nfserr_replay_me;
315 }
316 if (status)
317 goto out;
318
319 status = nfsd4_check_open_attributes(rqstp, cstate, open);
320 if (status)
321 goto out;
322
323 /* Openowner is now set, so sequence id will get bumped. Now we need
324 * these checks before we do any creates: */
325 status = nfserr_grace;
326 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
327 goto out;
328 status = nfserr_no_grace;
329 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
330 goto out;
331
332 switch (open->op_claim_type) {
333 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
334 case NFS4_OPEN_CLAIM_NULL:
335 /*
336 * (1) set CURRENT_FH to the file being opened,
337 * creating it if necessary, (2) set open->op_cinfo,
338 * (3) set open->op_truncate if the file is to be
339 * truncated after opening, (4) do permission checking.
340 */
341 status = do_open_lookup(rqstp, &cstate->current_fh,
342 open);
343 if (status)
344 goto out;
345 break;
346 case NFS4_OPEN_CLAIM_PREVIOUS:
347 open->op_stateowner->so_confirmed = 1;
348 /*
349 * The CURRENT_FH is already set to the file being
350 * opened. (1) set open->op_cinfo, (2) set
351 * open->op_truncate if the file is to be truncated
352 * after opening, (3) do permission checking.
353 */
354 status = do_open_fhandle(rqstp, &cstate->current_fh,
355 open);
356 if (status)
357 goto out;
358 break;
359 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
360 open->op_stateowner->so_confirmed = 1;
361 dprintk("NFSD: unsupported OPEN claim type %d\n",
362 open->op_claim_type);
363 status = nfserr_notsupp;
364 goto out;
365 default:
366 dprintk("NFSD: Invalid OPEN claim type %d\n",
367 open->op_claim_type);
368 status = nfserr_inval;
369 goto out;
370 }
371 /*
372 * nfsd4_process_open2() does the actual opening of the file. If
373 * successful, it (1) truncates the file if open->op_truncate was
374 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
375 */
376 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
377 out:
378 if (open->op_stateowner) {
379 nfs4_get_stateowner(open->op_stateowner);
380 cstate->replay_owner = open->op_stateowner;
381 }
382 nfs4_unlock_state();
383 return status;
384 }
385
386 /*
387 * filehandle-manipulating ops.
388 */
389 static __be32
390 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
391 struct svc_fh **getfh)
392 {
393 if (!cstate->current_fh.fh_dentry)
394 return nfserr_nofilehandle;
395
396 *getfh = &cstate->current_fh;
397 return nfs_ok;
398 }
399
400 static __be32
401 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
402 struct nfsd4_putfh *putfh)
403 {
404 fh_put(&cstate->current_fh);
405 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
406 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
407 putfh->pf_fhlen);
408 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
409 }
410
411 static __be32
412 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
413 void *arg)
414 {
415 __be32 status;
416
417 fh_put(&cstate->current_fh);
418 status = exp_pseudoroot(rqstp, &cstate->current_fh);
419 return status;
420 }
421
422 static __be32
423 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
424 void *arg)
425 {
426 if (!cstate->save_fh.fh_dentry)
427 return nfserr_restorefh;
428
429 fh_dup2(&cstate->current_fh, &cstate->save_fh);
430 return nfs_ok;
431 }
432
433 static __be32
434 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
435 void *arg)
436 {
437 if (!cstate->current_fh.fh_dentry)
438 return nfserr_nofilehandle;
439
440 fh_dup2(&cstate->save_fh, &cstate->current_fh);
441 return nfs_ok;
442 }
443
444 /*
445 * misc nfsv4 ops
446 */
447 static __be32
448 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
449 struct nfsd4_access *access)
450 {
451 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
452 return nfserr_inval;
453
454 access->ac_resp_access = access->ac_req_access;
455 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
456 &access->ac_supported);
457 }
458
459 static __be32
460 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
461 struct nfsd4_commit *commit)
462 {
463 __be32 status;
464
465 u32 *p = (u32 *)commit->co_verf.data;
466 *p++ = nfssvc_boot.tv_sec;
467 *p++ = nfssvc_boot.tv_usec;
468
469 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
470 commit->co_count);
471 if (status == nfserr_symlink)
472 status = nfserr_inval;
473 return status;
474 }
475
476 static __be32
477 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
478 struct nfsd4_create *create)
479 {
480 struct svc_fh resfh;
481 __be32 status;
482 dev_t rdev;
483
484 fh_init(&resfh, NFS4_FHSIZE);
485
486 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
487 NFSD_MAY_CREATE);
488 if (status == nfserr_symlink)
489 status = nfserr_notdir;
490 if (status)
491 return status;
492
493 status = check_attr_support(rqstp, cstate, create->cr_bmval,
494 nfsd_attrmask);
495 if (status)
496 return status;
497
498 switch (create->cr_type) {
499 case NF4LNK:
500 /* ugh! we have to null-terminate the linktext, or
501 * vfs_symlink() will choke. it is always safe to
502 * null-terminate by brute force, since at worst we
503 * will overwrite the first byte of the create namelen
504 * in the XDR buffer, which has already been extracted
505 * during XDR decode.
506 */
507 create->cr_linkname[create->cr_linklen] = 0;
508
509 status = nfsd_symlink(rqstp, &cstate->current_fh,
510 create->cr_name, create->cr_namelen,
511 create->cr_linkname, create->cr_linklen,
512 &resfh, &create->cr_iattr);
513 break;
514
515 case NF4BLK:
516 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
517 if (MAJOR(rdev) != create->cr_specdata1 ||
518 MINOR(rdev) != create->cr_specdata2)
519 return nfserr_inval;
520 status = nfsd_create(rqstp, &cstate->current_fh,
521 create->cr_name, create->cr_namelen,
522 &create->cr_iattr, S_IFBLK, rdev, &resfh);
523 break;
524
525 case NF4CHR:
526 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
527 if (MAJOR(rdev) != create->cr_specdata1 ||
528 MINOR(rdev) != create->cr_specdata2)
529 return nfserr_inval;
530 status = nfsd_create(rqstp, &cstate->current_fh,
531 create->cr_name, create->cr_namelen,
532 &create->cr_iattr,S_IFCHR, rdev, &resfh);
533 break;
534
535 case NF4SOCK:
536 status = nfsd_create(rqstp, &cstate->current_fh,
537 create->cr_name, create->cr_namelen,
538 &create->cr_iattr, S_IFSOCK, 0, &resfh);
539 break;
540
541 case NF4FIFO:
542 status = nfsd_create(rqstp, &cstate->current_fh,
543 create->cr_name, create->cr_namelen,
544 &create->cr_iattr, S_IFIFO, 0, &resfh);
545 break;
546
547 case NF4DIR:
548 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
549 status = nfsd_create(rqstp, &cstate->current_fh,
550 create->cr_name, create->cr_namelen,
551 &create->cr_iattr, S_IFDIR, 0, &resfh);
552 break;
553
554 default:
555 status = nfserr_badtype;
556 }
557
558 if (status)
559 goto out;
560
561 if (create->cr_acl != NULL)
562 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
563 create->cr_bmval);
564
565 fh_unlock(&cstate->current_fh);
566 set_change_info(&create->cr_cinfo, &cstate->current_fh);
567 fh_dup2(&cstate->current_fh, &resfh);
568 out:
569 fh_put(&resfh);
570 return status;
571 }
572
573 static __be32
574 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
575 struct nfsd4_getattr *getattr)
576 {
577 __be32 status;
578
579 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
580 if (status)
581 return status;
582
583 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
584 return nfserr_inval;
585
586 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
587 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
588 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
589
590 getattr->ga_fhp = &cstate->current_fh;
591 return nfs_ok;
592 }
593
594 static __be32
595 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
596 struct nfsd4_link *link)
597 {
598 __be32 status = nfserr_nofilehandle;
599
600 if (!cstate->save_fh.fh_dentry)
601 return status;
602 status = nfsd_link(rqstp, &cstate->current_fh,
603 link->li_name, link->li_namelen, &cstate->save_fh);
604 if (!status)
605 set_change_info(&link->li_cinfo, &cstate->current_fh);
606 return status;
607 }
608
609 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
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 == fh->fh_dentry) {
619 fh_put(&tmp_fh);
620 return nfserr_noent;
621 }
622 fh_put(&tmp_fh);
623 return nfsd_lookup(rqstp, fh, "..", 2, fh);
624 }
625
626 static __be32
627 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
628 void *arg)
629 {
630 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
631 }
632
633 static __be32
634 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
635 struct nfsd4_lookup *lookup)
636 {
637 return nfsd_lookup(rqstp, &cstate->current_fh,
638 lookup->lo_name, lookup->lo_len,
639 &cstate->current_fh);
640 }
641
642 static __be32
643 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
644 struct nfsd4_read *read)
645 {
646 __be32 status;
647
648 /* no need to check permission - this will be done in nfsd_read() */
649
650 read->rd_filp = NULL;
651 if (read->rd_offset >= OFFSET_MAX)
652 return nfserr_inval;
653
654 nfs4_lock_state();
655 /* check stateid */
656 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
657 RD_STATE, &read->rd_filp))) {
658 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
659 goto out;
660 }
661 if (read->rd_filp)
662 get_file(read->rd_filp);
663 status = nfs_ok;
664 out:
665 nfs4_unlock_state();
666 read->rd_rqstp = rqstp;
667 read->rd_fhp = &cstate->current_fh;
668 return status;
669 }
670
671 static __be32
672 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
673 struct nfsd4_readdir *readdir)
674 {
675 u64 cookie = readdir->rd_cookie;
676 static const nfs4_verifier zeroverf;
677
678 /* no need to check permission - this will be done in nfsd_readdir() */
679
680 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
681 return nfserr_inval;
682
683 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
684 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
685 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
686
687 if ((cookie == 1) || (cookie == 2) ||
688 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
689 return nfserr_bad_cookie;
690
691 readdir->rd_rqstp = rqstp;
692 readdir->rd_fhp = &cstate->current_fh;
693 return nfs_ok;
694 }
695
696 static __be32
697 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
698 struct nfsd4_readlink *readlink)
699 {
700 readlink->rl_rqstp = rqstp;
701 readlink->rl_fhp = &cstate->current_fh;
702 return nfs_ok;
703 }
704
705 static __be32
706 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
707 struct nfsd4_remove *remove)
708 {
709 __be32 status;
710
711 if (locks_in_grace())
712 return nfserr_grace;
713 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
714 remove->rm_name, remove->rm_namelen);
715 if (status == nfserr_symlink)
716 return nfserr_notdir;
717 if (!status) {
718 fh_unlock(&cstate->current_fh);
719 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
720 }
721 return status;
722 }
723
724 static __be32
725 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726 struct nfsd4_rename *rename)
727 {
728 __be32 status = nfserr_nofilehandle;
729
730 if (!cstate->save_fh.fh_dentry)
731 return status;
732 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
733 & NFSEXP_NOSUBTREECHECK))
734 return nfserr_grace;
735 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
736 rename->rn_snamelen, &cstate->current_fh,
737 rename->rn_tname, rename->rn_tnamelen);
738
739 /* the underlying filesystem returns different error's than required
740 * by NFSv4. both save_fh and current_fh have been verified.. */
741 if (status == nfserr_isdir)
742 status = nfserr_exist;
743 else if ((status == nfserr_notdir) &&
744 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
745 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
746 status = nfserr_exist;
747 else if (status == nfserr_symlink)
748 status = nfserr_notdir;
749
750 if (!status) {
751 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
752 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
753 }
754 return status;
755 }
756
757 static __be32
758 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
759 struct nfsd4_secinfo *secinfo)
760 {
761 struct svc_fh resfh;
762 struct svc_export *exp;
763 struct dentry *dentry;
764 __be32 err;
765
766 fh_init(&resfh, NFS4_FHSIZE);
767 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
768 if (err)
769 return err;
770 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
771 secinfo->si_name, secinfo->si_namelen,
772 &exp, &dentry);
773 if (err)
774 return err;
775 if (dentry->d_inode == NULL) {
776 exp_put(exp);
777 err = nfserr_noent;
778 } else
779 secinfo->si_exp = exp;
780 dput(dentry);
781 if (cstate->minorversion)
782 /* See rfc 5661 section 2.6.3.1.1.8 */
783 fh_put(&cstate->current_fh);
784 return err;
785 }
786
787 static __be32
788 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
789 struct nfsd4_secinfo_no_name *sin)
790 {
791 __be32 err;
792
793 switch (sin->sin_style) {
794 case NFS4_SECINFO_STYLE4_CURRENT_FH:
795 break;
796 case NFS4_SECINFO_STYLE4_PARENT:
797 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
798 if (err)
799 return err;
800 break;
801 default:
802 return nfserr_inval;
803 }
804 exp_get(cstate->current_fh.fh_export);
805 sin->sin_exp = cstate->current_fh.fh_export;
806 fh_put(&cstate->current_fh);
807 return nfs_ok;
808 }
809
810 static __be32
811 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
812 struct nfsd4_setattr *setattr)
813 {
814 __be32 status = nfs_ok;
815 int err;
816
817 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
818 nfs4_lock_state();
819 status = nfs4_preprocess_stateid_op(cstate,
820 &setattr->sa_stateid, WR_STATE, NULL);
821 nfs4_unlock_state();
822 if (status) {
823 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
824 return status;
825 }
826 }
827 err = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
828 if (err)
829 return nfserrno(err);
830 status = nfs_ok;
831
832 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
833 nfsd_attrmask);
834 if (status)
835 goto out;
836
837 if (setattr->sa_acl != NULL)
838 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
839 setattr->sa_acl);
840 if (status)
841 goto out;
842 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
843 0, (time_t)0);
844 out:
845 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
846 return status;
847 }
848
849 static __be32
850 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
851 struct nfsd4_write *write)
852 {
853 stateid_t *stateid = &write->wr_stateid;
854 struct file *filp = NULL;
855 u32 *p;
856 __be32 status = nfs_ok;
857 unsigned long cnt;
858
859 /* no need to check permission - this will be done in nfsd_write() */
860
861 if (write->wr_offset >= OFFSET_MAX)
862 return nfserr_inval;
863
864 nfs4_lock_state();
865 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
866 if (filp)
867 get_file(filp);
868 nfs4_unlock_state();
869
870 if (status) {
871 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
872 return status;
873 }
874
875 cnt = write->wr_buflen;
876 write->wr_how_written = write->wr_stable_how;
877 p = (u32 *)write->wr_verifier.data;
878 *p++ = nfssvc_boot.tv_sec;
879 *p++ = nfssvc_boot.tv_usec;
880
881 status = nfsd_write(rqstp, &cstate->current_fh, filp,
882 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
883 &cnt, &write->wr_how_written);
884 if (filp)
885 fput(filp);
886
887 write->wr_bytes_written = cnt;
888
889 if (status == nfserr_symlink)
890 status = nfserr_inval;
891 return status;
892 }
893
894 /* This routine never returns NFS_OK! If there are no other errors, it
895 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
896 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
897 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
898 */
899 static __be32
900 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
901 struct nfsd4_verify *verify)
902 {
903 __be32 *buf, *p;
904 int count;
905 __be32 status;
906
907 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
908 if (status)
909 return status;
910
911 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
912 if (status)
913 return status;
914
915 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
916 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
917 return nfserr_inval;
918 if (verify->ve_attrlen & 3)
919 return nfserr_inval;
920
921 /* count in words:
922 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
923 */
924 count = 4 + (verify->ve_attrlen >> 2);
925 buf = kmalloc(count << 2, GFP_KERNEL);
926 if (!buf)
927 return nfserr_jukebox;
928
929 status = nfsd4_encode_fattr(&cstate->current_fh,
930 cstate->current_fh.fh_export,
931 cstate->current_fh.fh_dentry, buf,
932 &count, verify->ve_bmval,
933 rqstp, 0);
934
935 /* this means that nfsd4_encode_fattr() ran out of space */
936 if (status == nfserr_resource && count == 0)
937 status = nfserr_not_same;
938 if (status)
939 goto out_kfree;
940
941 /* skip bitmap */
942 p = buf + 1 + ntohl(buf[0]);
943 status = nfserr_not_same;
944 if (ntohl(*p++) != verify->ve_attrlen)
945 goto out_kfree;
946 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
947 status = nfserr_same;
948
949 out_kfree:
950 kfree(buf);
951 return status;
952 }
953
954 static __be32
955 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
956 struct nfsd4_verify *verify)
957 {
958 __be32 status;
959
960 status = _nfsd4_verify(rqstp, cstate, verify);
961 return status == nfserr_not_same ? nfs_ok : status;
962 }
963
964 static __be32
965 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
966 struct nfsd4_verify *verify)
967 {
968 __be32 status;
969
970 status = _nfsd4_verify(rqstp, cstate, verify);
971 return status == nfserr_same ? nfs_ok : status;
972 }
973
974 /*
975 * NULL call.
976 */
977 static __be32
978 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
979 {
980 return nfs_ok;
981 }
982
983 static inline void nfsd4_increment_op_stats(u32 opnum)
984 {
985 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
986 nfsdstats.nfs4_opcount[opnum]++;
987 }
988
989 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
990 void *);
991 enum nfsd4_op_flags {
992 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
993 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
994 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
995 /* For rfc 5661 section 2.6.3.1.1: */
996 OP_HANDLES_WRONGSEC = 1 << 3,
997 OP_IS_PUTFH_LIKE = 1 << 4,
998 };
999
1000 struct nfsd4_operation {
1001 nfsd4op_func op_func;
1002 u32 op_flags;
1003 char *op_name;
1004 };
1005
1006 static struct nfsd4_operation nfsd4_ops[];
1007
1008 static const char *nfsd4_op_name(unsigned opnum);
1009
1010 /*
1011 * Enforce NFSv4.1 COMPOUND ordering rules:
1012 *
1013 * Also note, enforced elsewhere:
1014 * - SEQUENCE other than as first op results in
1015 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1016 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1017 * (Enforced in nfsd4_bind_conn_to_session().)
1018 * - DESTROY_SESSION must be the final operation in a compound, if
1019 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1020 * (Enforced in nfsd4_destroy_session().)
1021 */
1022 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1023 {
1024 struct nfsd4_op *op = &args->ops[0];
1025
1026 /* These ordering requirements don't apply to NFSv4.0: */
1027 if (args->minorversion == 0)
1028 return nfs_ok;
1029 /* This is weird, but OK, not our problem: */
1030 if (args->opcnt == 0)
1031 return nfs_ok;
1032 if (op->status == nfserr_op_illegal)
1033 return nfs_ok;
1034 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1035 return nfserr_op_not_in_session;
1036 if (op->opnum == OP_SEQUENCE)
1037 return nfs_ok;
1038 if (args->opcnt != 1)
1039 return nfserr_not_only_op;
1040 return nfs_ok;
1041 }
1042
1043 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1044 {
1045 return &nfsd4_ops[op->opnum];
1046 }
1047
1048 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1049 {
1050 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1051 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1052 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1053 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1054 struct nfsd4_operation *thisd;
1055 struct nfsd4_operation *nextd;
1056
1057 thisd = OPDESC(this);
1058 /*
1059 * Most ops check wronsec on our own; only the putfh-like ops
1060 * have special rules.
1061 */
1062 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1063 return false;
1064 /*
1065 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1066 * put-filehandle operation if we're not going to use the
1067 * result:
1068 */
1069 if (argp->opcnt == resp->opcnt)
1070 return false;
1071
1072 nextd = OPDESC(next);
1073 /*
1074 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1075 * errors themselves as necessary; others should check for them
1076 * now:
1077 */
1078 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1079 }
1080
1081 /*
1082 * COMPOUND call.
1083 */
1084 static __be32
1085 nfsd4_proc_compound(struct svc_rqst *rqstp,
1086 struct nfsd4_compoundargs *args,
1087 struct nfsd4_compoundres *resp)
1088 {
1089 struct nfsd4_op *op;
1090 struct nfsd4_operation *opdesc;
1091 struct nfsd4_compound_state *cstate = &resp->cstate;
1092 int slack_bytes;
1093 __be32 status;
1094
1095 resp->xbuf = &rqstp->rq_res;
1096 resp->p = rqstp->rq_res.head[0].iov_base +
1097 rqstp->rq_res.head[0].iov_len;
1098 resp->tagp = resp->p;
1099 /* reserve space for: taglen, tag, and opcnt */
1100 resp->p += 2 + XDR_QUADLEN(args->taglen);
1101 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1102 resp->taglen = args->taglen;
1103 resp->tag = args->tag;
1104 resp->opcnt = 0;
1105 resp->rqstp = rqstp;
1106 resp->cstate.minorversion = args->minorversion;
1107 resp->cstate.replay_owner = NULL;
1108 resp->cstate.session = NULL;
1109 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1110 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1111 /*
1112 * Don't use the deferral mechanism for NFSv4; compounds make it
1113 * too hard to avoid non-idempotency problems.
1114 */
1115 rqstp->rq_usedeferral = 0;
1116
1117 /*
1118 * According to RFC3010, this takes precedence over all other errors.
1119 */
1120 status = nfserr_minor_vers_mismatch;
1121 if (args->minorversion > nfsd_supported_minorversion)
1122 goto out;
1123
1124 status = nfs41_check_op_ordering(args);
1125 if (status) {
1126 op = &args->ops[0];
1127 op->status = status;
1128 goto encode_op;
1129 }
1130
1131 while (!status && resp->opcnt < args->opcnt) {
1132 op = &args->ops[resp->opcnt++];
1133
1134 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1135 resp->opcnt, args->opcnt, op->opnum,
1136 nfsd4_op_name(op->opnum));
1137 /*
1138 * The XDR decode routines may have pre-set op->status;
1139 * for example, if there is a miscellaneous XDR error
1140 * it will be set to nfserr_bad_xdr.
1141 */
1142 if (op->status)
1143 goto encode_op;
1144
1145 /* We must be able to encode a successful response to
1146 * this operation, with enough room left over to encode a
1147 * failed response to the next operation. If we don't
1148 * have enough room, fail with ERR_RESOURCE.
1149 */
1150 slack_bytes = (char *)resp->end - (char *)resp->p;
1151 if (slack_bytes < COMPOUND_SLACK_SPACE
1152 + COMPOUND_ERR_SLACK_SPACE) {
1153 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1154 op->status = nfserr_resource;
1155 goto encode_op;
1156 }
1157
1158 opdesc = OPDESC(op);
1159
1160 if (!cstate->current_fh.fh_dentry) {
1161 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1162 op->status = nfserr_nofilehandle;
1163 goto encode_op;
1164 }
1165 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1166 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1167 op->status = nfserr_moved;
1168 goto encode_op;
1169 }
1170
1171 if (opdesc->op_func)
1172 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1173 else
1174 BUG_ON(op->status == nfs_ok);
1175
1176 if (!op->status && need_wrongsec_check(rqstp))
1177 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1178
1179 encode_op:
1180 /* Only from SEQUENCE */
1181 if (resp->cstate.status == nfserr_replay_cache) {
1182 dprintk("%s NFS4.1 replay from cache\n", __func__);
1183 status = op->status;
1184 goto out;
1185 }
1186 if (op->status == nfserr_replay_me) {
1187 op->replay = &cstate->replay_owner->so_replay;
1188 nfsd4_encode_replay(resp, op);
1189 status = op->status = op->replay->rp_status;
1190 } else {
1191 nfsd4_encode_operation(resp, op);
1192 status = op->status;
1193 }
1194
1195 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1196 args->ops, args->opcnt, resp->opcnt, op->opnum,
1197 be32_to_cpu(status));
1198
1199 if (cstate->replay_owner) {
1200 nfs4_put_stateowner(cstate->replay_owner);
1201 cstate->replay_owner = NULL;
1202 }
1203 /* XXX Ugh, we need to get rid of this kind of special case: */
1204 if (op->opnum == OP_READ && op->u.read.rd_filp)
1205 fput(op->u.read.rd_filp);
1206
1207 nfsd4_increment_op_stats(op->opnum);
1208 }
1209
1210 resp->cstate.status = status;
1211 fh_put(&resp->cstate.current_fh);
1212 fh_put(&resp->cstate.save_fh);
1213 BUG_ON(resp->cstate.replay_owner);
1214 out:
1215 nfsd4_release_compoundargs(args);
1216 /* Reset deferral mechanism for RPC deferrals */
1217 rqstp->rq_usedeferral = 1;
1218 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1219 return status;
1220 }
1221
1222 static struct nfsd4_operation nfsd4_ops[] = {
1223 [OP_ACCESS] = {
1224 .op_func = (nfsd4op_func)nfsd4_access,
1225 .op_name = "OP_ACCESS",
1226 },
1227 [OP_CLOSE] = {
1228 .op_func = (nfsd4op_func)nfsd4_close,
1229 .op_name = "OP_CLOSE",
1230 },
1231 [OP_COMMIT] = {
1232 .op_func = (nfsd4op_func)nfsd4_commit,
1233 .op_name = "OP_COMMIT",
1234 },
1235 [OP_CREATE] = {
1236 .op_func = (nfsd4op_func)nfsd4_create,
1237 .op_name = "OP_CREATE",
1238 },
1239 [OP_DELEGRETURN] = {
1240 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1241 .op_name = "OP_DELEGRETURN",
1242 },
1243 [OP_GETATTR] = {
1244 .op_func = (nfsd4op_func)nfsd4_getattr,
1245 .op_flags = ALLOWED_ON_ABSENT_FS,
1246 .op_name = "OP_GETATTR",
1247 },
1248 [OP_GETFH] = {
1249 .op_func = (nfsd4op_func)nfsd4_getfh,
1250 .op_name = "OP_GETFH",
1251 },
1252 [OP_LINK] = {
1253 .op_func = (nfsd4op_func)nfsd4_link,
1254 .op_name = "OP_LINK",
1255 },
1256 [OP_LOCK] = {
1257 .op_func = (nfsd4op_func)nfsd4_lock,
1258 .op_name = "OP_LOCK",
1259 },
1260 [OP_LOCKT] = {
1261 .op_func = (nfsd4op_func)nfsd4_lockt,
1262 .op_name = "OP_LOCKT",
1263 },
1264 [OP_LOCKU] = {
1265 .op_func = (nfsd4op_func)nfsd4_locku,
1266 .op_name = "OP_LOCKU",
1267 },
1268 [OP_LOOKUP] = {
1269 .op_func = (nfsd4op_func)nfsd4_lookup,
1270 .op_flags = OP_HANDLES_WRONGSEC,
1271 .op_name = "OP_LOOKUP",
1272 },
1273 [OP_LOOKUPP] = {
1274 .op_func = (nfsd4op_func)nfsd4_lookupp,
1275 .op_flags = OP_HANDLES_WRONGSEC,
1276 .op_name = "OP_LOOKUPP",
1277 },
1278 [OP_NVERIFY] = {
1279 .op_func = (nfsd4op_func)nfsd4_nverify,
1280 .op_name = "OP_NVERIFY",
1281 },
1282 [OP_OPEN] = {
1283 .op_func = (nfsd4op_func)nfsd4_open,
1284 .op_flags = OP_HANDLES_WRONGSEC,
1285 .op_name = "OP_OPEN",
1286 },
1287 [OP_OPEN_CONFIRM] = {
1288 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1289 .op_name = "OP_OPEN_CONFIRM",
1290 },
1291 [OP_OPEN_DOWNGRADE] = {
1292 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1293 .op_name = "OP_OPEN_DOWNGRADE",
1294 },
1295 [OP_PUTFH] = {
1296 .op_func = (nfsd4op_func)nfsd4_putfh,
1297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1298 | OP_IS_PUTFH_LIKE,
1299 .op_name = "OP_PUTFH",
1300 },
1301 [OP_PUTPUBFH] = {
1302 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1303 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1304 | OP_IS_PUTFH_LIKE,
1305 .op_name = "OP_PUTPUBFH",
1306 },
1307 [OP_PUTROOTFH] = {
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_PUTROOTFH",
1312 },
1313 [OP_READ] = {
1314 .op_func = (nfsd4op_func)nfsd4_read,
1315 .op_name = "OP_READ",
1316 },
1317 [OP_READDIR] = {
1318 .op_func = (nfsd4op_func)nfsd4_readdir,
1319 .op_name = "OP_READDIR",
1320 },
1321 [OP_READLINK] = {
1322 .op_func = (nfsd4op_func)nfsd4_readlink,
1323 .op_name = "OP_READLINK",
1324 },
1325 [OP_REMOVE] = {
1326 .op_func = (nfsd4op_func)nfsd4_remove,
1327 .op_name = "OP_REMOVE",
1328 },
1329 [OP_RENAME] = {
1330 .op_name = "OP_RENAME",
1331 .op_func = (nfsd4op_func)nfsd4_rename,
1332 },
1333 [OP_RENEW] = {
1334 .op_func = (nfsd4op_func)nfsd4_renew,
1335 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1336 .op_name = "OP_RENEW",
1337 },
1338 [OP_RESTOREFH] = {
1339 .op_func = (nfsd4op_func)nfsd4_restorefh,
1340 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1341 | OP_IS_PUTFH_LIKE,
1342 .op_name = "OP_RESTOREFH",
1343 },
1344 [OP_SAVEFH] = {
1345 .op_func = (nfsd4op_func)nfsd4_savefh,
1346 .op_flags = OP_HANDLES_WRONGSEC,
1347 .op_name = "OP_SAVEFH",
1348 },
1349 [OP_SECINFO] = {
1350 .op_func = (nfsd4op_func)nfsd4_secinfo,
1351 .op_flags = OP_HANDLES_WRONGSEC,
1352 .op_name = "OP_SECINFO",
1353 },
1354 [OP_SETATTR] = {
1355 .op_func = (nfsd4op_func)nfsd4_setattr,
1356 .op_name = "OP_SETATTR",
1357 },
1358 [OP_SETCLIENTID] = {
1359 .op_func = (nfsd4op_func)nfsd4_setclientid,
1360 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1361 .op_name = "OP_SETCLIENTID",
1362 },
1363 [OP_SETCLIENTID_CONFIRM] = {
1364 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1365 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1366 .op_name = "OP_SETCLIENTID_CONFIRM",
1367 },
1368 [OP_VERIFY] = {
1369 .op_func = (nfsd4op_func)nfsd4_verify,
1370 .op_name = "OP_VERIFY",
1371 },
1372 [OP_WRITE] = {
1373 .op_func = (nfsd4op_func)nfsd4_write,
1374 .op_name = "OP_WRITE",
1375 },
1376 [OP_RELEASE_LOCKOWNER] = {
1377 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1378 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1379 .op_name = "OP_RELEASE_LOCKOWNER",
1380 },
1381
1382 /* NFSv4.1 operations */
1383 [OP_EXCHANGE_ID] = {
1384 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1385 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1386 .op_name = "OP_EXCHANGE_ID",
1387 },
1388 [OP_BIND_CONN_TO_SESSION] = {
1389 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1390 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1391 .op_name = "OP_BIND_CONN_TO_SESSION",
1392 },
1393 [OP_CREATE_SESSION] = {
1394 .op_func = (nfsd4op_func)nfsd4_create_session,
1395 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1396 .op_name = "OP_CREATE_SESSION",
1397 },
1398 [OP_DESTROY_SESSION] = {
1399 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1400 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1401 .op_name = "OP_DESTROY_SESSION",
1402 },
1403 [OP_SEQUENCE] = {
1404 .op_func = (nfsd4op_func)nfsd4_sequence,
1405 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1406 .op_name = "OP_SEQUENCE",
1407 },
1408 [OP_RECLAIM_COMPLETE] = {
1409 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1410 .op_flags = ALLOWED_WITHOUT_FH,
1411 .op_name = "OP_RECLAIM_COMPLETE",
1412 },
1413 [OP_SECINFO_NO_NAME] = {
1414 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1415 .op_flags = OP_HANDLES_WRONGSEC,
1416 .op_name = "OP_SECINFO_NO_NAME",
1417 },
1418 };
1419
1420 static const char *nfsd4_op_name(unsigned opnum)
1421 {
1422 if (opnum < ARRAY_SIZE(nfsd4_ops))
1423 return nfsd4_ops[opnum].op_name;
1424 return "unknown_operation";
1425 }
1426
1427 #define nfsd4_voidres nfsd4_voidargs
1428 struct nfsd4_voidargs { int dummy; };
1429
1430 /*
1431 * TODO: At the present time, the NFSv4 server does not do XID caching
1432 * of requests. Implementing XID caching would not be a serious problem,
1433 * although it would require a mild change in interfaces since one
1434 * doesn't know whether an NFSv4 request is idempotent until after the
1435 * XDR decode. However, XID caching totally confuses pynfs (Peter
1436 * Astrand's regression testsuite for NFSv4 servers), which reuses
1437 * XID's liberally, so I've left it unimplemented until pynfs generates
1438 * better XID's.
1439 */
1440 static struct svc_procedure nfsd_procedures4[2] = {
1441 [NFSPROC4_NULL] = {
1442 .pc_func = (svc_procfunc) nfsd4_proc_null,
1443 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1444 .pc_argsize = sizeof(struct nfsd4_voidargs),
1445 .pc_ressize = sizeof(struct nfsd4_voidres),
1446 .pc_cachetype = RC_NOCACHE,
1447 .pc_xdrressize = 1,
1448 },
1449 [NFSPROC4_COMPOUND] = {
1450 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1451 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1452 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1453 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1454 .pc_ressize = sizeof(struct nfsd4_compoundres),
1455 .pc_cachetype = RC_NOCACHE,
1456 .pc_xdrressize = NFSD_BUFSIZE/4,
1457 },
1458 };
1459
1460 struct svc_version nfsd_version4 = {
1461 .vs_vers = 4,
1462 .vs_nproc = 2,
1463 .vs_proc = nfsd_procedures4,
1464 .vs_dispatch = nfsd_dispatch,
1465 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1466 };
1467
1468 /*
1469 * Local variables:
1470 * c-basic-offset: 8
1471 * End:
1472 */
Linux with added FPC-III support