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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / fs / nfsd / nfs4proc.c
blobbebc0c2e1b0a9022dbd1dcf4d9204de8f9ef0434
1 /*
2 * fs/nfsd/nfs4proc.c
3 *
4 * Server-side procedures for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/major.h>
40 #include <linux/slab.h>
41 #include <linux/file.h>
42
43 #include <linux/sunrpc/svc.h>
44 #include <linux/nfsd/nfsd.h>
45 #include <linux/nfsd/cache.h>
46 #include <linux/nfs4.h>
47 #include <linux/nfsd/state.h>
48 #include <linux/nfsd/xdr4.h>
49 #include <linux/nfs4_acl.h>
50 #include <linux/sunrpc/gss_api.h>
51
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
53
54 static u32 nfsd_attrmask[] = {
55 NFSD_WRITEABLE_ATTRS_WORD0,
56 NFSD_WRITEABLE_ATTRS_WORD1,
57 NFSD_WRITEABLE_ATTRS_WORD2
58 };
59
60 static u32 nfsd41_ex_attrmask[] = {
61 NFSD_SUPPATTR_EXCLCREAT_WORD0,
62 NFSD_SUPPATTR_EXCLCREAT_WORD1,
63 NFSD_SUPPATTR_EXCLCREAT_WORD2
64 };
65
66 static __be32
67 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
68 u32 *bmval, u32 *writable)
69 {
70 struct dentry *dentry = cstate->current_fh.fh_dentry;
71
72 /*
73 * Check about attributes are supported by the NFSv4 server or not.
74 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
75 */
76 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
77 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
78 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
79 return nfserr_attrnotsupp;
80
81 /*
82 * Check FATTR4_WORD0_ACL can be supported
83 * in current environment or not.
84 */
85 if (bmval[0] & FATTR4_WORD0_ACL) {
86 if (!IS_POSIXACL(dentry->d_inode))
87 return nfserr_attrnotsupp;
88 }
89
90 /*
91 * According to spec, read-only attributes return ERR_INVAL.
92 */
93 if (writable) {
94 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
95 (bmval[2] & ~writable[2]))
96 return nfserr_inval;
97 }
98
99 return nfs_ok;
100 }
101
102 static __be32
103 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
104 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
105 {
106 __be32 status = nfs_ok;
107
108 if (open->op_create == NFS4_OPEN_CREATE) {
109 if (open->op_createmode == NFS4_CREATE_UNCHECKED
110 || open->op_createmode == NFS4_CREATE_GUARDED)
111 status = check_attr_support(rqstp, cstate,
112 open->op_bmval, nfsd_attrmask);
113 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
114 status = check_attr_support(rqstp, cstate,
115 open->op_bmval, nfsd41_ex_attrmask);
116 }
117
118 return status;
119 }
120
121 static int
122 is_create_with_attrs(struct nfsd4_open *open)
123 {
124 return open->op_create == NFS4_OPEN_CREATE
125 && (open->op_createmode == NFS4_CREATE_UNCHECKED
126 || open->op_createmode == NFS4_CREATE_GUARDED
127 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
128 }
129
130 /*
131 * if error occurs when setting the acl, just clear the acl bit
132 * in the returned attr bitmap.
133 */
134 static void
135 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
136 struct nfs4_acl *acl, u32 *bmval)
137 {
138 __be32 status;
139
140 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
141 if (status)
142 /*
143 * We should probably fail the whole open at this point,
144 * but we've already created the file, so it's too late;
145 * So this seems the least of evils:
146 */
147 bmval[0] &= ~FATTR4_WORD0_ACL;
148 }
149
150 static inline void
151 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
152 {
153 fh_put(dst);
154 dget(src->fh_dentry);
155 if (src->fh_export)
156 cache_get(&src->fh_export->h);
157 *dst = *src;
158 }
159
160 static __be32
161 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
162 {
163 __be32 status;
164
165 if (open->op_truncate &&
166 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
167 return nfserr_inval;
168
169 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
170 accmode |= NFSD_MAY_READ;
171 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
172 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
173 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
174 accmode |= NFSD_MAY_WRITE;
175
176 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
177
178 return status;
179 }
180
181 static __be32
182 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
183 {
184 struct svc_fh resfh;
185 __be32 status;
186 int created = 0;
187
188 fh_init(&resfh, NFS4_FHSIZE);
189 open->op_truncate = 0;
190
191 if (open->op_create) {
192 /* FIXME: check session persistence and pnfs flags.
193 * The nfsv4.1 spec requires the following semantics:
194 *
195 * Persistent | pNFS | Server REQUIRED | Client Allowed
196 * Reply Cache | server | |
197 * -------------+--------+-----------------+--------------------
198 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
199 * | | | (SHOULD)
200 * | | and EXCLUSIVE4 | or EXCLUSIVE4
201 * | | | (SHOULD NOT)
202 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
203 * yes | no | GUARDED4 | GUARDED4
204 * yes | yes | GUARDED4 | GUARDED4
205 */
206
207 /*
208 * Note: create modes (UNCHECKED,GUARDED...) are the same
209 * in NFSv4 as in v3.
210 */
211 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
212 open->op_fname.len, &open->op_iattr,
213 &resfh, open->op_createmode,
214 (u32 *)open->op_verf.data,
215 &open->op_truncate, &created);
216
217 /*
218 * Following rfc 3530 14.2.16, use the returned bitmask
219 * to indicate which attributes we used to store the
220 * verifier:
221 */
222 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
223 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
224 FATTR4_WORD1_TIME_MODIFY);
225 } else {
226 status = nfsd_lookup(rqstp, current_fh,
227 open->op_fname.data, open->op_fname.len, &resfh);
228 fh_unlock(current_fh);
229 }
230 if (status)
231 goto out;
232
233 if (is_create_with_attrs(open) && open->op_acl != NULL)
234 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
235
236 set_change_info(&open->op_cinfo, current_fh);
237 fh_dup2(current_fh, &resfh);
238
239 /* set reply cache */
240 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
241 &resfh.fh_handle);
242 if (!created)
243 status = do_open_permission(rqstp, current_fh, open,
244 NFSD_MAY_NOP);
245
246 out:
247 fh_put(&resfh);
248 return status;
249 }
250
251 static __be32
252 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
253 {
254 __be32 status;
255
256 /* Only reclaims from previously confirmed clients are valid */
257 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
258 return status;
259
260 /* We don't know the target directory, and therefore can not
261 * set the change info
262 */
263
264 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
265
266 /* set replay cache */
267 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
268 &current_fh->fh_handle);
269
270 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
271 (open->op_iattr.ia_size == 0);
272
273 status = do_open_permission(rqstp, current_fh, open,
274 NFSD_MAY_OWNER_OVERRIDE);
275
276 return status;
277 }
278
279 static void
280 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
281 {
282 struct nfsd4_sessionid *sid =
283 (struct nfsd4_sessionid *)session->se_sessionid.data;
284
285 clid->cl_boot = sid->clientid.cl_boot;
286 clid->cl_id = sid->clientid.cl_id;
287 }
288
289 static __be32
290 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
291 struct nfsd4_open *open)
292 {
293 __be32 status;
294 struct nfsd4_compoundres *resp;
295
296 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
297 (int)open->op_fname.len, open->op_fname.data,
298 open->op_stateowner);
299
300 /* This check required by spec. */
301 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
302 return nfserr_inval;
303
304 if (nfsd4_has_session(cstate))
305 copy_clientid(&open->op_clientid, cstate->session);
306
307 nfs4_lock_state();
308
309 /* check seqid for replay. set nfs4_owner */
310 resp = rqstp->rq_resp;
311 status = nfsd4_process_open1(&resp->cstate, open);
312 if (status == nfserr_replay_me) {
313 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
314 fh_put(&cstate->current_fh);
315 fh_copy_shallow(&cstate->current_fh.fh_handle,
316 &rp->rp_openfh);
317 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
318 if (status)
319 dprintk("nfsd4_open: replay failed"
320 " restoring previous filehandle\n");
321 else
322 status = nfserr_replay_me;
323 }
324 if (status)
325 goto out;
326
327 status = nfsd4_check_open_attributes(rqstp, cstate, open);
328 if (status)
329 goto out;
330
331 /* Openowner is now set, so sequence id will get bumped. Now we need
332 * these checks before we do any creates: */
333 status = nfserr_grace;
334 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
335 goto out;
336 status = nfserr_no_grace;
337 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
338 goto out;
339
340 switch (open->op_claim_type) {
341 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
342 case NFS4_OPEN_CLAIM_NULL:
343 /*
344 * (1) set CURRENT_FH to the file being opened,
345 * creating it if necessary, (2) set open->op_cinfo,
346 * (3) set open->op_truncate if the file is to be
347 * truncated after opening, (4) do permission checking.
348 */
349 status = do_open_lookup(rqstp, &cstate->current_fh,
350 open);
351 if (status)
352 goto out;
353 break;
354 case NFS4_OPEN_CLAIM_PREVIOUS:
355 open->op_stateowner->so_confirmed = 1;
356 /*
357 * The CURRENT_FH is already set to the file being
358 * opened. (1) set open->op_cinfo, (2) set
359 * open->op_truncate if the file is to be truncated
360 * after opening, (3) do permission checking.
361 */
362 status = do_open_fhandle(rqstp, &cstate->current_fh,
363 open);
364 if (status)
365 goto out;
366 break;
367 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
368 open->op_stateowner->so_confirmed = 1;
369 dprintk("NFSD: unsupported OPEN claim type %d\n",
370 open->op_claim_type);
371 status = nfserr_notsupp;
372 goto out;
373 default:
374 dprintk("NFSD: Invalid OPEN claim type %d\n",
375 open->op_claim_type);
376 status = nfserr_inval;
377 goto out;
378 }
379 /*
380 * nfsd4_process_open2() does the actual opening of the file. If
381 * successful, it (1) truncates the file if open->op_truncate was
382 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
383 */
384 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
385 out:
386 if (open->op_stateowner) {
387 nfs4_get_stateowner(open->op_stateowner);
388 cstate->replay_owner = open->op_stateowner;
389 }
390 nfs4_unlock_state();
391 return status;
392 }
393
394 /*
395 * filehandle-manipulating ops.
396 */
397 static __be32
398 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
399 struct svc_fh **getfh)
400 {
401 if (!cstate->current_fh.fh_dentry)
402 return nfserr_nofilehandle;
403
404 *getfh = &cstate->current_fh;
405 return nfs_ok;
406 }
407
408 static __be32
409 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
410 struct nfsd4_putfh *putfh)
411 {
412 fh_put(&cstate->current_fh);
413 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
414 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
415 putfh->pf_fhlen);
416 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
417 }
418
419 static __be32
420 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
421 void *arg)
422 {
423 __be32 status;
424
425 fh_put(&cstate->current_fh);
426 status = exp_pseudoroot(rqstp, &cstate->current_fh);
427 return status;
428 }
429
430 static __be32
431 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
432 void *arg)
433 {
434 if (!cstate->save_fh.fh_dentry)
435 return nfserr_restorefh;
436
437 fh_dup2(&cstate->current_fh, &cstate->save_fh);
438 return nfs_ok;
439 }
440
441 static __be32
442 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
443 void *arg)
444 {
445 if (!cstate->current_fh.fh_dentry)
446 return nfserr_nofilehandle;
447
448 fh_dup2(&cstate->save_fh, &cstate->current_fh);
449 return nfs_ok;
450 }
451
452 /*
453 * misc nfsv4 ops
454 */
455 static __be32
456 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
457 struct nfsd4_access *access)
458 {
459 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
460 return nfserr_inval;
461
462 access->ac_resp_access = access->ac_req_access;
463 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
464 &access->ac_supported);
465 }
466
467 static __be32
468 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
469 struct nfsd4_commit *commit)
470 {
471 __be32 status;
472
473 u32 *p = (u32 *)commit->co_verf.data;
474 *p++ = nfssvc_boot.tv_sec;
475 *p++ = nfssvc_boot.tv_usec;
476
477 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
478 commit->co_count);
479 if (status == nfserr_symlink)
480 status = nfserr_inval;
481 return status;
482 }
483
484 static __be32
485 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
486 struct nfsd4_create *create)
487 {
488 struct svc_fh resfh;
489 __be32 status;
490 dev_t rdev;
491
492 fh_init(&resfh, NFS4_FHSIZE);
493
494 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
495 NFSD_MAY_CREATE);
496 if (status == nfserr_symlink)
497 status = nfserr_notdir;
498 if (status)
499 return status;
500
501 status = check_attr_support(rqstp, cstate, create->cr_bmval,
502 nfsd_attrmask);
503 if (status)
504 return status;
505
506 switch (create->cr_type) {
507 case NF4LNK:
508 /* ugh! we have to null-terminate the linktext, or
509 * vfs_symlink() will choke. it is always safe to
510 * null-terminate by brute force, since at worst we
511 * will overwrite the first byte of the create namelen
512 * in the XDR buffer, which has already been extracted
513 * during XDR decode.
514 */
515 create->cr_linkname[create->cr_linklen] = 0;
516
517 status = nfsd_symlink(rqstp, &cstate->current_fh,
518 create->cr_name, create->cr_namelen,
519 create->cr_linkname, create->cr_linklen,
520 &resfh, &create->cr_iattr);
521 break;
522
523 case NF4BLK:
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_IFBLK, rdev, &resfh);
531 break;
532
533 case NF4CHR:
534 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
535 if (MAJOR(rdev) != create->cr_specdata1 ||
536 MINOR(rdev) != create->cr_specdata2)
537 return nfserr_inval;
538 status = nfsd_create(rqstp, &cstate->current_fh,
539 create->cr_name, create->cr_namelen,
540 &create->cr_iattr,S_IFCHR, rdev, &resfh);
541 break;
542
543 case NF4SOCK:
544 status = nfsd_create(rqstp, &cstate->current_fh,
545 create->cr_name, create->cr_namelen,
546 &create->cr_iattr, S_IFSOCK, 0, &resfh);
547 break;
548
549 case NF4FIFO:
550 status = nfsd_create(rqstp, &cstate->current_fh,
551 create->cr_name, create->cr_namelen,
552 &create->cr_iattr, S_IFIFO, 0, &resfh);
553 break;
554
555 case NF4DIR:
556 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
557 status = nfsd_create(rqstp, &cstate->current_fh,
558 create->cr_name, create->cr_namelen,
559 &create->cr_iattr, S_IFDIR, 0, &resfh);
560 break;
561
562 default:
563 status = nfserr_badtype;
564 }
565
566 if (status)
567 goto out;
568
569 if (create->cr_acl != NULL)
570 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
571 create->cr_bmval);
572
573 fh_unlock(&cstate->current_fh);
574 set_change_info(&create->cr_cinfo, &cstate->current_fh);
575 fh_dup2(&cstate->current_fh, &resfh);
576 out:
577 fh_put(&resfh);
578 return status;
579 }
580
581 static __be32
582 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
583 struct nfsd4_getattr *getattr)
584 {
585 __be32 status;
586
587 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
588 if (status)
589 return status;
590
591 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
592 return nfserr_inval;
593
594 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
595 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
596 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
597
598 getattr->ga_fhp = &cstate->current_fh;
599 return nfs_ok;
600 }
601
602 static __be32
603 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
604 struct nfsd4_link *link)
605 {
606 __be32 status = nfserr_nofilehandle;
607
608 if (!cstate->save_fh.fh_dentry)
609 return status;
610 status = nfsd_link(rqstp, &cstate->current_fh,
611 link->li_name, link->li_namelen, &cstate->save_fh);
612 if (!status)
613 set_change_info(&link->li_cinfo, &cstate->current_fh);
614 return status;
615 }
616
617 static __be32
618 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
619 void *arg)
620 {
621 struct svc_fh tmp_fh;
622 __be32 ret;
623
624 fh_init(&tmp_fh, NFS4_FHSIZE);
625 ret = exp_pseudoroot(rqstp, &tmp_fh);
626 if (ret)
627 return ret;
628 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
629 fh_put(&tmp_fh);
630 return nfserr_noent;
631 }
632 fh_put(&tmp_fh);
633 return nfsd_lookup(rqstp, &cstate->current_fh,
634 "..", 2, &cstate->current_fh);
635 }
636
637 static __be32
638 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
639 struct nfsd4_lookup *lookup)
640 {
641 return nfsd_lookup(rqstp, &cstate->current_fh,
642 lookup->lo_name, lookup->lo_len,
643 &cstate->current_fh);
644 }
645
646 static __be32
647 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
648 struct nfsd4_read *read)
649 {
650 __be32 status;
651
652 /* no need to check permission - this will be done in nfsd_read() */
653
654 read->rd_filp = NULL;
655 if (read->rd_offset >= OFFSET_MAX)
656 return nfserr_inval;
657
658 nfs4_lock_state();
659 /* check stateid */
660 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
661 RD_STATE, &read->rd_filp))) {
662 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
663 goto out;
664 }
665 if (read->rd_filp)
666 get_file(read->rd_filp);
667 status = nfs_ok;
668 out:
669 nfs4_unlock_state();
670 read->rd_rqstp = rqstp;
671 read->rd_fhp = &cstate->current_fh;
672 return status;
673 }
674
675 static __be32
676 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
677 struct nfsd4_readdir *readdir)
678 {
679 u64 cookie = readdir->rd_cookie;
680 static const nfs4_verifier zeroverf;
681
682 /* no need to check permission - this will be done in nfsd_readdir() */
683
684 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
685 return nfserr_inval;
686
687 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
688 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
689 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
690
691 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
692 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
693 return nfserr_bad_cookie;
694
695 readdir->rd_rqstp = rqstp;
696 readdir->rd_fhp = &cstate->current_fh;
697 return nfs_ok;
698 }
699
700 static __be32
701 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
702 struct nfsd4_readlink *readlink)
703 {
704 readlink->rl_rqstp = rqstp;
705 readlink->rl_fhp = &cstate->current_fh;
706 return nfs_ok;
707 }
708
709 static __be32
710 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
711 struct nfsd4_remove *remove)
712 {
713 __be32 status;
714
715 if (locks_in_grace())
716 return nfserr_grace;
717 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
718 remove->rm_name, remove->rm_namelen);
719 if (status == nfserr_symlink)
720 return nfserr_notdir;
721 if (!status) {
722 fh_unlock(&cstate->current_fh);
723 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
724 }
725 return status;
726 }
727
728 static __be32
729 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
730 struct nfsd4_rename *rename)
731 {
732 __be32 status = nfserr_nofilehandle;
733
734 if (!cstate->save_fh.fh_dentry)
735 return status;
736 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
737 & NFSEXP_NOSUBTREECHECK))
738 return nfserr_grace;
739 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
740 rename->rn_snamelen, &cstate->current_fh,
741 rename->rn_tname, rename->rn_tnamelen);
742
743 /* the underlying filesystem returns different error's than required
744 * by NFSv4. both save_fh and current_fh have been verified.. */
745 if (status == nfserr_isdir)
746 status = nfserr_exist;
747 else if ((status == nfserr_notdir) &&
748 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
749 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
750 status = nfserr_exist;
751 else if (status == nfserr_symlink)
752 status = nfserr_notdir;
753
754 if (!status) {
755 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
756 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
757 }
758 return status;
759 }
760
761 static __be32
762 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
763 struct nfsd4_secinfo *secinfo)
764 {
765 struct svc_fh resfh;
766 struct svc_export *exp;
767 struct dentry *dentry;
768 __be32 err;
769
770 fh_init(&resfh, NFS4_FHSIZE);
771 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
772 secinfo->si_name, secinfo->si_namelen,
773 &exp, &dentry);
774 if (err)
775 return err;
776 if (dentry->d_inode == NULL) {
777 exp_put(exp);
778 err = nfserr_noent;
779 } else
780 secinfo->si_exp = exp;
781 dput(dentry);
782 return err;
783 }
784
785 static __be32
786 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
787 struct nfsd4_setattr *setattr)
788 {
789 __be32 status = nfs_ok;
790
791 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
792 nfs4_lock_state();
793 status = nfs4_preprocess_stateid_op(cstate,
794 &setattr->sa_stateid, WR_STATE, NULL);
795 nfs4_unlock_state();
796 if (status) {
797 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
798 return status;
799 }
800 }
801 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
802 if (status)
803 return status;
804 status = nfs_ok;
805
806 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
807 nfsd_attrmask);
808 if (status)
809 goto out;
810
811 if (setattr->sa_acl != NULL)
812 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
813 setattr->sa_acl);
814 if (status)
815 goto out;
816 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
817 0, (time_t)0);
818 out:
819 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
820 return status;
821 }
822
823 static __be32
824 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
825 struct nfsd4_write *write)
826 {
827 stateid_t *stateid = &write->wr_stateid;
828 struct file *filp = NULL;
829 u32 *p;
830 __be32 status = nfs_ok;
831 unsigned long cnt;
832
833 /* no need to check permission - this will be done in nfsd_write() */
834
835 if (write->wr_offset >= OFFSET_MAX)
836 return nfserr_inval;
837
838 nfs4_lock_state();
839 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
840 if (filp)
841 get_file(filp);
842 nfs4_unlock_state();
843
844 if (status) {
845 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
846 return status;
847 }
848
849 cnt = write->wr_buflen;
850 write->wr_how_written = write->wr_stable_how;
851 p = (u32 *)write->wr_verifier.data;
852 *p++ = nfssvc_boot.tv_sec;
853 *p++ = nfssvc_boot.tv_usec;
854
855 status = nfsd_write(rqstp, &cstate->current_fh, filp,
856 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
857 &cnt, &write->wr_how_written);
858 if (filp)
859 fput(filp);
860
861 write->wr_bytes_written = cnt;
862
863 if (status == nfserr_symlink)
864 status = nfserr_inval;
865 return status;
866 }
867
868 /* This routine never returns NFS_OK! If there are no other errors, it
869 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
870 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
871 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
872 */
873 static __be32
874 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
875 struct nfsd4_verify *verify)
876 {
877 __be32 *buf, *p;
878 int count;
879 __be32 status;
880
881 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
882 if (status)
883 return status;
884
885 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
886 if (status)
887 return status;
888
889 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
890 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
891 return nfserr_inval;
892 if (verify->ve_attrlen & 3)
893 return nfserr_inval;
894
895 /* count in words:
896 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
897 */
898 count = 4 + (verify->ve_attrlen >> 2);
899 buf = kmalloc(count << 2, GFP_KERNEL);
900 if (!buf)
901 return nfserr_resource;
902
903 status = nfsd4_encode_fattr(&cstate->current_fh,
904 cstate->current_fh.fh_export,
905 cstate->current_fh.fh_dentry, buf,
906 &count, verify->ve_bmval,
907 rqstp, 0);
908
909 /* this means that nfsd4_encode_fattr() ran out of space */
910 if (status == nfserr_resource && count == 0)
911 status = nfserr_not_same;
912 if (status)
913 goto out_kfree;
914
915 /* skip bitmap */
916 p = buf + 1 + ntohl(buf[0]);
917 status = nfserr_not_same;
918 if (ntohl(*p++) != verify->ve_attrlen)
919 goto out_kfree;
920 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
921 status = nfserr_same;
922
923 out_kfree:
924 kfree(buf);
925 return status;
926 }
927
928 static __be32
929 nfsd4_nverify(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_not_same ? nfs_ok : status;
936 }
937
938 static __be32
939 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
940 struct nfsd4_verify *verify)
941 {
942 __be32 status;
943
944 status = _nfsd4_verify(rqstp, cstate, verify);
945 return status == nfserr_same ? nfs_ok : status;
946 }
947
948 /*
949 * NULL call.
950 */
951 static __be32
952 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
953 {
954 return nfs_ok;
955 }
956
957 static inline void nfsd4_increment_op_stats(u32 opnum)
958 {
959 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
960 nfsdstats.nfs4_opcount[opnum]++;
961 }
962
963 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
964 void *);
965 enum nfsd4_op_flags {
966 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
967 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */
968 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */
969 };
970
971 struct nfsd4_operation {
972 nfsd4op_func op_func;
973 u32 op_flags;
974 char *op_name;
975 };
976
977 static struct nfsd4_operation nfsd4_ops[];
978
979 static const char *nfsd4_op_name(unsigned opnum);
980
981 /*
982 * Enforce NFSv4.1 COMPOUND ordering rules.
983 *
984 * TODO:
985 * - enforce NFS4ERR_NOT_ONLY_OP,
986 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
987 */
988 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
989 {
990 if (args->minorversion && args->opcnt > 0) {
991 struct nfsd4_op *op = &args->ops[0];
992 return (op->status == nfserr_op_illegal) ||
993 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
994 }
995 return true;
996 }
997
998 /*
999 * COMPOUND call.
1000 */
1001 static __be32
1002 nfsd4_proc_compound(struct svc_rqst *rqstp,
1003 struct nfsd4_compoundargs *args,
1004 struct nfsd4_compoundres *resp)
1005 {
1006 struct nfsd4_op *op;
1007 struct nfsd4_operation *opdesc;
1008 struct nfsd4_compound_state *cstate = &resp->cstate;
1009 int slack_bytes;
1010 __be32 status;
1011
1012 resp->xbuf = &rqstp->rq_res;
1013 resp->p = rqstp->rq_res.head[0].iov_base +
1014 rqstp->rq_res.head[0].iov_len;
1015 resp->tagp = resp->p;
1016 /* reserve space for: taglen, tag, and opcnt */
1017 resp->p += 2 + XDR_QUADLEN(args->taglen);
1018 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1019 resp->taglen = args->taglen;
1020 resp->tag = args->tag;
1021 resp->opcnt = 0;
1022 resp->rqstp = rqstp;
1023 resp->cstate.minorversion = args->minorversion;
1024 resp->cstate.replay_owner = NULL;
1025 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1026 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1027 /* Use the deferral mechanism only for NFSv4.0 compounds */
1028 rqstp->rq_usedeferral = (args->minorversion == 0);
1029
1030 /*
1031 * According to RFC3010, this takes precedence over all other errors.
1032 */
1033 status = nfserr_minor_vers_mismatch;
1034 if (args->minorversion > nfsd_supported_minorversion)
1035 goto out;
1036
1037 if (!nfs41_op_ordering_ok(args)) {
1038 op = &args->ops[0];
1039 op->status = nfserr_sequence_pos;
1040 goto encode_op;
1041 }
1042
1043 status = nfs_ok;
1044 while (!status && resp->opcnt < args->opcnt) {
1045 op = &args->ops[resp->opcnt++];
1046
1047 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1048 resp->opcnt, args->opcnt, op->opnum,
1049 nfsd4_op_name(op->opnum));
1050 /*
1051 * The XDR decode routines may have pre-set op->status;
1052 * for example, if there is a miscellaneous XDR error
1053 * it will be set to nfserr_bad_xdr.
1054 */
1055 if (op->status)
1056 goto encode_op;
1057
1058 /* We must be able to encode a successful response to
1059 * this operation, with enough room left over to encode a
1060 * failed response to the next operation. If we don't
1061 * have enough room, fail with ERR_RESOURCE.
1062 */
1063 slack_bytes = (char *)resp->end - (char *)resp->p;
1064 if (slack_bytes < COMPOUND_SLACK_SPACE
1065 + COMPOUND_ERR_SLACK_SPACE) {
1066 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1067 op->status = nfserr_resource;
1068 goto encode_op;
1069 }
1070
1071 opdesc = &nfsd4_ops[op->opnum];
1072
1073 if (!cstate->current_fh.fh_dentry) {
1074 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1075 op->status = nfserr_nofilehandle;
1076 goto encode_op;
1077 }
1078 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1079 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1080 op->status = nfserr_moved;
1081 goto encode_op;
1082 }
1083
1084 if (opdesc->op_func)
1085 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1086 else
1087 BUG_ON(op->status == nfs_ok);
1088
1089 encode_op:
1090 /* Only from SEQUENCE */
1091 if (resp->cstate.status == nfserr_replay_cache) {
1092 dprintk("%s NFS4.1 replay from cache\n", __func__);
1093 status = op->status;
1094 goto out;
1095 }
1096 if (op->status == nfserr_replay_me) {
1097 op->replay = &cstate->replay_owner->so_replay;
1098 nfsd4_encode_replay(resp, op);
1099 status = op->status = op->replay->rp_status;
1100 } else {
1101 nfsd4_encode_operation(resp, op);
1102 status = op->status;
1103 }
1104
1105 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1106 args->ops, args->opcnt, resp->opcnt, op->opnum,
1107 be32_to_cpu(status));
1108
1109 if (cstate->replay_owner) {
1110 nfs4_put_stateowner(cstate->replay_owner);
1111 cstate->replay_owner = NULL;
1112 }
1113 /* XXX Ugh, we need to get rid of this kind of special case: */
1114 if (op->opnum == OP_READ && op->u.read.rd_filp)
1115 fput(op->u.read.rd_filp);
1116
1117 nfsd4_increment_op_stats(op->opnum);
1118 }
1119 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1120 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1121 status = nfserr_jukebox;
1122 }
1123
1124 resp->cstate.status = status;
1125 fh_put(&resp->cstate.current_fh);
1126 fh_put(&resp->cstate.save_fh);
1127 BUG_ON(resp->cstate.replay_owner);
1128 out:
1129 nfsd4_release_compoundargs(args);
1130 /* Reset deferral mechanism for RPC deferrals */
1131 rqstp->rq_usedeferral = 1;
1132 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1133 return status;
1134 }
1135
1136 static struct nfsd4_operation nfsd4_ops[] = {
1137 [OP_ACCESS] = {
1138 .op_func = (nfsd4op_func)nfsd4_access,
1139 .op_name = "OP_ACCESS",
1140 },
1141 [OP_CLOSE] = {
1142 .op_func = (nfsd4op_func)nfsd4_close,
1143 .op_name = "OP_CLOSE",
1144 },
1145 [OP_COMMIT] = {
1146 .op_func = (nfsd4op_func)nfsd4_commit,
1147 .op_name = "OP_COMMIT",
1148 },
1149 [OP_CREATE] = {
1150 .op_func = (nfsd4op_func)nfsd4_create,
1151 .op_name = "OP_CREATE",
1152 },
1153 [OP_DELEGRETURN] = {
1154 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1155 .op_name = "OP_DELEGRETURN",
1156 },
1157 [OP_GETATTR] = {
1158 .op_func = (nfsd4op_func)nfsd4_getattr,
1159 .op_flags = ALLOWED_ON_ABSENT_FS,
1160 .op_name = "OP_GETATTR",
1161 },
1162 [OP_GETFH] = {
1163 .op_func = (nfsd4op_func)nfsd4_getfh,
1164 .op_name = "OP_GETFH",
1165 },
1166 [OP_LINK] = {
1167 .op_func = (nfsd4op_func)nfsd4_link,
1168 .op_name = "OP_LINK",
1169 },
1170 [OP_LOCK] = {
1171 .op_func = (nfsd4op_func)nfsd4_lock,
1172 .op_name = "OP_LOCK",
1173 },
1174 [OP_LOCKT] = {
1175 .op_func = (nfsd4op_func)nfsd4_lockt,
1176 .op_name = "OP_LOCKT",
1177 },
1178 [OP_LOCKU] = {
1179 .op_func = (nfsd4op_func)nfsd4_locku,
1180 .op_name = "OP_LOCKU",
1181 },
1182 [OP_LOOKUP] = {
1183 .op_func = (nfsd4op_func)nfsd4_lookup,
1184 .op_name = "OP_LOOKUP",
1185 },
1186 [OP_LOOKUPP] = {
1187 .op_func = (nfsd4op_func)nfsd4_lookupp,
1188 .op_name = "OP_LOOKUPP",
1189 },
1190 [OP_NVERIFY] = {
1191 .op_func = (nfsd4op_func)nfsd4_nverify,
1192 .op_name = "OP_NVERIFY",
1193 },
1194 [OP_OPEN] = {
1195 .op_func = (nfsd4op_func)nfsd4_open,
1196 .op_name = "OP_OPEN",
1197 },
1198 [OP_OPEN_CONFIRM] = {
1199 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1200 .op_name = "OP_OPEN_CONFIRM",
1201 },
1202 [OP_OPEN_DOWNGRADE] = {
1203 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1204 .op_name = "OP_OPEN_DOWNGRADE",
1205 },
1206 [OP_PUTFH] = {
1207 .op_func = (nfsd4op_func)nfsd4_putfh,
1208 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1209 .op_name = "OP_PUTFH",
1210 },
1211 [OP_PUTPUBFH] = {
1212 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1214 .op_name = "OP_PUTPUBFH",
1215 },
1216 [OP_PUTROOTFH] = {
1217 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1219 .op_name = "OP_PUTROOTFH",
1220 },
1221 [OP_READ] = {
1222 .op_func = (nfsd4op_func)nfsd4_read,
1223 .op_name = "OP_READ",
1224 },
1225 [OP_READDIR] = {
1226 .op_func = (nfsd4op_func)nfsd4_readdir,
1227 .op_name = "OP_READDIR",
1228 },
1229 [OP_READLINK] = {
1230 .op_func = (nfsd4op_func)nfsd4_readlink,
1231 .op_name = "OP_READLINK",
1232 },
1233 [OP_REMOVE] = {
1234 .op_func = (nfsd4op_func)nfsd4_remove,
1235 .op_name = "OP_REMOVE",
1236 },
1237 [OP_RENAME] = {
1238 .op_name = "OP_RENAME",
1239 .op_func = (nfsd4op_func)nfsd4_rename,
1240 },
1241 [OP_RENEW] = {
1242 .op_func = (nfsd4op_func)nfsd4_renew,
1243 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1244 .op_name = "OP_RENEW",
1245 },
1246 [OP_RESTOREFH] = {
1247 .op_func = (nfsd4op_func)nfsd4_restorefh,
1248 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1249 .op_name = "OP_RESTOREFH",
1250 },
1251 [OP_SAVEFH] = {
1252 .op_func = (nfsd4op_func)nfsd4_savefh,
1253 .op_name = "OP_SAVEFH",
1254 },
1255 [OP_SECINFO] = {
1256 .op_func = (nfsd4op_func)nfsd4_secinfo,
1257 .op_name = "OP_SECINFO",
1258 },
1259 [OP_SETATTR] = {
1260 .op_func = (nfsd4op_func)nfsd4_setattr,
1261 .op_name = "OP_SETATTR",
1262 },
1263 [OP_SETCLIENTID] = {
1264 .op_func = (nfsd4op_func)nfsd4_setclientid,
1265 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1266 .op_name = "OP_SETCLIENTID",
1267 },
1268 [OP_SETCLIENTID_CONFIRM] = {
1269 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1270 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1271 .op_name = "OP_SETCLIENTID_CONFIRM",
1272 },
1273 [OP_VERIFY] = {
1274 .op_func = (nfsd4op_func)nfsd4_verify,
1275 .op_name = "OP_VERIFY",
1276 },
1277 [OP_WRITE] = {
1278 .op_func = (nfsd4op_func)nfsd4_write,
1279 .op_name = "OP_WRITE",
1280 },
1281 [OP_RELEASE_LOCKOWNER] = {
1282 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1283 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1284 .op_name = "OP_RELEASE_LOCKOWNER",
1285 },
1286
1287 /* NFSv4.1 operations */
1288 [OP_EXCHANGE_ID] = {
1289 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1290 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1291 .op_name = "OP_EXCHANGE_ID",
1292 },
1293 [OP_CREATE_SESSION] = {
1294 .op_func = (nfsd4op_func)nfsd4_create_session,
1295 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1296 .op_name = "OP_CREATE_SESSION",
1297 },
1298 [OP_DESTROY_SESSION] = {
1299 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1301 .op_name = "OP_DESTROY_SESSION",
1302 },
1303 [OP_SEQUENCE] = {
1304 .op_func = (nfsd4op_func)nfsd4_sequence,
1305 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1306 .op_name = "OP_SEQUENCE",
1307 },
1308 };
1309
1310 static const char *nfsd4_op_name(unsigned opnum)
1311 {
1312 if (opnum < ARRAY_SIZE(nfsd4_ops))
1313 return nfsd4_ops[opnum].op_name;
1314 return "unknown_operation";
1315 }
1316
1317 #define nfsd4_voidres nfsd4_voidargs
1318 struct nfsd4_voidargs { int dummy; };
1319
1320 /*
1321 * TODO: At the present time, the NFSv4 server does not do XID caching
1322 * of requests. Implementing XID caching would not be a serious problem,
1323 * although it would require a mild change in interfaces since one
1324 * doesn't know whether an NFSv4 request is idempotent until after the
1325 * XDR decode. However, XID caching totally confuses pynfs (Peter
1326 * Astrand's regression testsuite for NFSv4 servers), which reuses
1327 * XID's liberally, so I've left it unimplemented until pynfs generates
1328 * better XID's.
1329 */
1330 static struct svc_procedure nfsd_procedures4[2] = {
1331 [NFSPROC4_NULL] = {
1332 .pc_func = (svc_procfunc) nfsd4_proc_null,
1333 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1334 .pc_argsize = sizeof(struct nfsd4_voidargs),
1335 .pc_ressize = sizeof(struct nfsd4_voidres),
1336 .pc_cachetype = RC_NOCACHE,
1337 .pc_xdrressize = 1,
1338 },
1339 [NFSPROC4_COMPOUND] = {
1340 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1341 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1342 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1343 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1344 .pc_ressize = sizeof(struct nfsd4_compoundres),
1345 .pc_cachetype = RC_NOCACHE,
1346 .pc_xdrressize = NFSD_BUFSIZE/4,
1347 },
1348 };
1349
1350 struct svc_version nfsd_version4 = {
1351 .vs_vers = 4,
1352 .vs_nproc = 2,
1353 .vs_proc = nfsd_procedures4,
1354 .vs_dispatch = nfsd_dispatch,
1355 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1356 };
1357
1358 /*
1359 * Local variables:
1360 * c-basic-offset: 8
1361 * End:
1362 */
Linux with added FPC-III support