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memcg: fix reclaimable lru check in memcg
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4proc.c
blob3a6dbd70b34b57146cacfb8e22d0601481ec5349
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 if (nfsd4_has_session(cstate))
295 copy_clientid(&open->op_clientid, cstate->session);
296
297 nfs4_lock_state();
298
299 /* check seqid for replay. set nfs4_owner */
300 resp = rqstp->rq_resp;
301 status = nfsd4_process_open1(&resp->cstate, open);
302 if (status == nfserr_replay_me) {
303 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
304 fh_put(&cstate->current_fh);
305 fh_copy_shallow(&cstate->current_fh.fh_handle,
306 &rp->rp_openfh);
307 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
308 if (status)
309 dprintk("nfsd4_open: replay failed"
310 " restoring previous filehandle\n");
311 else
312 status = nfserr_replay_me;
313 }
314 if (status)
315 goto out;
316
317 status = nfsd4_check_open_attributes(rqstp, cstate, open);
318 if (status)
319 goto out;
320
321 /* Openowner is now set, so sequence id will get bumped. Now we need
322 * these checks before we do any creates: */
323 status = nfserr_grace;
324 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
325 goto out;
326 status = nfserr_no_grace;
327 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
328 goto out;
329
330 switch (open->op_claim_type) {
331 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
332 case NFS4_OPEN_CLAIM_NULL:
333 /*
334 * (1) set CURRENT_FH to the file being opened,
335 * creating it if necessary, (2) set open->op_cinfo,
336 * (3) set open->op_truncate if the file is to be
337 * truncated after opening, (4) do permission checking.
338 */
339 status = do_open_lookup(rqstp, &cstate->current_fh,
340 open);
341 if (status)
342 goto out;
343 break;
344 case NFS4_OPEN_CLAIM_PREVIOUS:
345 open->op_stateowner->so_confirmed = 1;
346 /*
347 * The CURRENT_FH is already set to the file being
348 * opened. (1) set open->op_cinfo, (2) set
349 * open->op_truncate if the file is to be truncated
350 * after opening, (3) do permission checking.
351 */
352 status = do_open_fhandle(rqstp, &cstate->current_fh,
353 open);
354 if (status)
355 goto out;
356 break;
357 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
358 open->op_stateowner->so_confirmed = 1;
359 dprintk("NFSD: unsupported OPEN claim type %d\n",
360 open->op_claim_type);
361 status = nfserr_notsupp;
362 goto out;
363 default:
364 dprintk("NFSD: Invalid OPEN claim type %d\n",
365 open->op_claim_type);
366 status = nfserr_inval;
367 goto out;
368 }
369 /*
370 * nfsd4_process_open2() does the actual opening of the file. If
371 * successful, it (1) truncates the file if open->op_truncate was
372 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
373 */
374 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
375 out:
376 if (open->op_stateowner) {
377 nfs4_get_stateowner(open->op_stateowner);
378 cstate->replay_owner = open->op_stateowner;
379 }
380 nfs4_unlock_state();
381 return status;
382 }
383
384 /*
385 * filehandle-manipulating ops.
386 */
387 static __be32
388 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
389 struct svc_fh **getfh)
390 {
391 if (!cstate->current_fh.fh_dentry)
392 return nfserr_nofilehandle;
393
394 *getfh = &cstate->current_fh;
395 return nfs_ok;
396 }
397
398 static __be32
399 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
400 struct nfsd4_putfh *putfh)
401 {
402 fh_put(&cstate->current_fh);
403 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
404 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
405 putfh->pf_fhlen);
406 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
407 }
408
409 static __be32
410 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
411 void *arg)
412 {
413 __be32 status;
414
415 fh_put(&cstate->current_fh);
416 status = exp_pseudoroot(rqstp, &cstate->current_fh);
417 return status;
418 }
419
420 static __be32
421 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
422 void *arg)
423 {
424 if (!cstate->save_fh.fh_dentry)
425 return nfserr_restorefh;
426
427 fh_dup2(&cstate->current_fh, &cstate->save_fh);
428 return nfs_ok;
429 }
430
431 static __be32
432 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
433 void *arg)
434 {
435 if (!cstate->current_fh.fh_dentry)
436 return nfserr_nofilehandle;
437
438 fh_dup2(&cstate->save_fh, &cstate->current_fh);
439 return nfs_ok;
440 }
441
442 /*
443 * misc nfsv4 ops
444 */
445 static __be32
446 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
447 struct nfsd4_access *access)
448 {
449 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
450 return nfserr_inval;
451
452 access->ac_resp_access = access->ac_req_access;
453 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
454 &access->ac_supported);
455 }
456
457 static __be32
458 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
459 struct nfsd4_commit *commit)
460 {
461 __be32 status;
462
463 u32 *p = (u32 *)commit->co_verf.data;
464 *p++ = nfssvc_boot.tv_sec;
465 *p++ = nfssvc_boot.tv_usec;
466
467 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
468 commit->co_count);
469 if (status == nfserr_symlink)
470 status = nfserr_inval;
471 return status;
472 }
473
474 static __be32
475 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
476 struct nfsd4_create *create)
477 {
478 struct svc_fh resfh;
479 __be32 status;
480 dev_t rdev;
481
482 fh_init(&resfh, NFS4_FHSIZE);
483
484 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
485 NFSD_MAY_CREATE);
486 if (status == nfserr_symlink)
487 status = nfserr_notdir;
488 if (status)
489 return status;
490
491 status = check_attr_support(rqstp, cstate, create->cr_bmval,
492 nfsd_attrmask);
493 if (status)
494 return status;
495
496 switch (create->cr_type) {
497 case NF4LNK:
498 /* ugh! we have to null-terminate the linktext, or
499 * vfs_symlink() will choke. it is always safe to
500 * null-terminate by brute force, since at worst we
501 * will overwrite the first byte of the create namelen
502 * in the XDR buffer, which has already been extracted
503 * during XDR decode.
504 */
505 create->cr_linkname[create->cr_linklen] = 0;
506
507 status = nfsd_symlink(rqstp, &cstate->current_fh,
508 create->cr_name, create->cr_namelen,
509 create->cr_linkname, create->cr_linklen,
510 &resfh, &create->cr_iattr);
511 break;
512
513 case NF4BLK:
514 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
515 if (MAJOR(rdev) != create->cr_specdata1 ||
516 MINOR(rdev) != create->cr_specdata2)
517 return nfserr_inval;
518 status = nfsd_create(rqstp, &cstate->current_fh,
519 create->cr_name, create->cr_namelen,
520 &create->cr_iattr, S_IFBLK, rdev, &resfh);
521 break;
522
523 case NF4CHR:
524 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
525 if (MAJOR(rdev) != create->cr_specdata1 ||
526 MINOR(rdev) != create->cr_specdata2)
527 return nfserr_inval;
528 status = nfsd_create(rqstp, &cstate->current_fh,
529 create->cr_name, create->cr_namelen,
530 &create->cr_iattr,S_IFCHR, rdev, &resfh);
531 break;
532
533 case NF4SOCK:
534 status = nfsd_create(rqstp, &cstate->current_fh,
535 create->cr_name, create->cr_namelen,
536 &create->cr_iattr, S_IFSOCK, 0, &resfh);
537 break;
538
539 case NF4FIFO:
540 status = nfsd_create(rqstp, &cstate->current_fh,
541 create->cr_name, create->cr_namelen,
542 &create->cr_iattr, S_IFIFO, 0, &resfh);
543 break;
544
545 case NF4DIR:
546 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
547 status = nfsd_create(rqstp, &cstate->current_fh,
548 create->cr_name, create->cr_namelen,
549 &create->cr_iattr, S_IFDIR, 0, &resfh);
550 break;
551
552 default:
553 status = nfserr_badtype;
554 }
555
556 if (status)
557 goto out;
558
559 if (create->cr_acl != NULL)
560 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
561 create->cr_bmval);
562
563 fh_unlock(&cstate->current_fh);
564 set_change_info(&create->cr_cinfo, &cstate->current_fh);
565 fh_dup2(&cstate->current_fh, &resfh);
566 out:
567 fh_put(&resfh);
568 return status;
569 }
570
571 static __be32
572 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
573 struct nfsd4_getattr *getattr)
574 {
575 __be32 status;
576
577 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
578 if (status)
579 return status;
580
581 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
582 return nfserr_inval;
583
584 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
585 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
586 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
587
588 getattr->ga_fhp = &cstate->current_fh;
589 return nfs_ok;
590 }
591
592 static __be32
593 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
594 struct nfsd4_link *link)
595 {
596 __be32 status = nfserr_nofilehandle;
597
598 if (!cstate->save_fh.fh_dentry)
599 return status;
600 status = nfsd_link(rqstp, &cstate->current_fh,
601 link->li_name, link->li_namelen, &cstate->save_fh);
602 if (!status)
603 set_change_info(&link->li_cinfo, &cstate->current_fh);
604 return status;
605 }
606
607 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
608 {
609 struct svc_fh tmp_fh;
610 __be32 ret;
611
612 fh_init(&tmp_fh, NFS4_FHSIZE);
613 ret = exp_pseudoroot(rqstp, &tmp_fh);
614 if (ret)
615 return ret;
616 if (tmp_fh.fh_dentry == fh->fh_dentry) {
617 fh_put(&tmp_fh);
618 return nfserr_noent;
619 }
620 fh_put(&tmp_fh);
621 return nfsd_lookup(rqstp, fh, "..", 2, fh);
622 }
623
624 static __be32
625 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
626 void *arg)
627 {
628 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
629 }
630
631 static __be32
632 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
633 struct nfsd4_lookup *lookup)
634 {
635 return nfsd_lookup(rqstp, &cstate->current_fh,
636 lookup->lo_name, lookup->lo_len,
637 &cstate->current_fh);
638 }
639
640 static __be32
641 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
642 struct nfsd4_read *read)
643 {
644 __be32 status;
645
646 /* no need to check permission - this will be done in nfsd_read() */
647
648 read->rd_filp = NULL;
649 if (read->rd_offset >= OFFSET_MAX)
650 return nfserr_inval;
651
652 nfs4_lock_state();
653 /* check stateid */
654 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
655 RD_STATE, &read->rd_filp))) {
656 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
657 goto out;
658 }
659 if (read->rd_filp)
660 get_file(read->rd_filp);
661 status = nfs_ok;
662 out:
663 nfs4_unlock_state();
664 read->rd_rqstp = rqstp;
665 read->rd_fhp = &cstate->current_fh;
666 return status;
667 }
668
669 static __be32
670 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
671 struct nfsd4_readdir *readdir)
672 {
673 u64 cookie = readdir->rd_cookie;
674 static const nfs4_verifier zeroverf;
675
676 /* no need to check permission - this will be done in nfsd_readdir() */
677
678 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
679 return nfserr_inval;
680
681 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
682 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
683 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
684
685 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
686 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
687 return nfserr_bad_cookie;
688
689 readdir->rd_rqstp = rqstp;
690 readdir->rd_fhp = &cstate->current_fh;
691 return nfs_ok;
692 }
693
694 static __be32
695 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
696 struct nfsd4_readlink *readlink)
697 {
698 readlink->rl_rqstp = rqstp;
699 readlink->rl_fhp = &cstate->current_fh;
700 return nfs_ok;
701 }
702
703 static __be32
704 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
705 struct nfsd4_remove *remove)
706 {
707 __be32 status;
708
709 if (locks_in_grace())
710 return nfserr_grace;
711 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
712 remove->rm_name, remove->rm_namelen);
713 if (status == nfserr_symlink)
714 return nfserr_notdir;
715 if (!status) {
716 fh_unlock(&cstate->current_fh);
717 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
718 }
719 return status;
720 }
721
722 static __be32
723 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
724 struct nfsd4_rename *rename)
725 {
726 __be32 status = nfserr_nofilehandle;
727
728 if (!cstate->save_fh.fh_dentry)
729 return status;
730 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
731 & NFSEXP_NOSUBTREECHECK))
732 return nfserr_grace;
733 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
734 rename->rn_snamelen, &cstate->current_fh,
735 rename->rn_tname, rename->rn_tnamelen);
736
737 /* the underlying filesystem returns different error's than required
738 * by NFSv4. both save_fh and current_fh have been verified.. */
739 if (status == nfserr_isdir)
740 status = nfserr_exist;
741 else if ((status == nfserr_notdir) &&
742 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
743 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
744 status = nfserr_exist;
745 else if (status == nfserr_symlink)
746 status = nfserr_notdir;
747
748 if (!status) {
749 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
750 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
751 }
752 return status;
753 }
754
755 static __be32
756 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
757 struct nfsd4_secinfo *secinfo)
758 {
759 struct svc_fh resfh;
760 struct svc_export *exp;
761 struct dentry *dentry;
762 __be32 err;
763
764 fh_init(&resfh, NFS4_FHSIZE);
765 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
766 if (err)
767 return err;
768 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
769 secinfo->si_name, secinfo->si_namelen,
770 &exp, &dentry);
771 if (err)
772 return err;
773 if (dentry->d_inode == NULL) {
774 exp_put(exp);
775 err = nfserr_noent;
776 } else
777 secinfo->si_exp = exp;
778 dput(dentry);
779 if (cstate->minorversion)
780 /* See rfc 5661 section 2.6.3.1.1.8 */
781 fh_put(&cstate->current_fh);
782 return err;
783 }
784
785 static __be32
786 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
787 struct nfsd4_secinfo_no_name *sin)
788 {
789 __be32 err;
790
791 switch (sin->sin_style) {
792 case NFS4_SECINFO_STYLE4_CURRENT_FH:
793 break;
794 case NFS4_SECINFO_STYLE4_PARENT:
795 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
796 if (err)
797 return err;
798 break;
799 default:
800 return nfserr_inval;
801 }
802 exp_get(cstate->current_fh.fh_export);
803 sin->sin_exp = cstate->current_fh.fh_export;
804 fh_put(&cstate->current_fh);
805 return nfs_ok;
806 }
807
808 static __be32
809 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
810 struct nfsd4_setattr *setattr)
811 {
812 __be32 status = nfs_ok;
813
814 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
815 nfs4_lock_state();
816 status = nfs4_preprocess_stateid_op(cstate,
817 &setattr->sa_stateid, WR_STATE, NULL);
818 nfs4_unlock_state();
819 if (status) {
820 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
821 return status;
822 }
823 }
824 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
825 if (status)
826 return status;
827 status = nfs_ok;
828
829 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
830 nfsd_attrmask);
831 if (status)
832 goto out;
833
834 if (setattr->sa_acl != NULL)
835 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
836 setattr->sa_acl);
837 if (status)
838 goto out;
839 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
840 0, (time_t)0);
841 out:
842 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
843 return status;
844 }
845
846 static __be32
847 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
848 struct nfsd4_write *write)
849 {
850 stateid_t *stateid = &write->wr_stateid;
851 struct file *filp = NULL;
852 u32 *p;
853 __be32 status = nfs_ok;
854 unsigned long cnt;
855
856 /* no need to check permission - this will be done in nfsd_write() */
857
858 if (write->wr_offset >= OFFSET_MAX)
859 return nfserr_inval;
860
861 nfs4_lock_state();
862 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
863 if (filp)
864 get_file(filp);
865 nfs4_unlock_state();
866
867 if (status) {
868 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
869 return status;
870 }
871
872 cnt = write->wr_buflen;
873 write->wr_how_written = write->wr_stable_how;
874 p = (u32 *)write->wr_verifier.data;
875 *p++ = nfssvc_boot.tv_sec;
876 *p++ = nfssvc_boot.tv_usec;
877
878 status = nfsd_write(rqstp, &cstate->current_fh, filp,
879 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
880 &cnt, &write->wr_how_written);
881 if (filp)
882 fput(filp);
883
884 write->wr_bytes_written = cnt;
885
886 if (status == nfserr_symlink)
887 status = nfserr_inval;
888 return status;
889 }
890
891 /* This routine never returns NFS_OK! If there are no other errors, it
892 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
893 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
894 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
895 */
896 static __be32
897 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
898 struct nfsd4_verify *verify)
899 {
900 __be32 *buf, *p;
901 int count;
902 __be32 status;
903
904 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
905 if (status)
906 return status;
907
908 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
909 if (status)
910 return status;
911
912 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
913 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
914 return nfserr_inval;
915 if (verify->ve_attrlen & 3)
916 return nfserr_inval;
917
918 /* count in words:
919 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
920 */
921 count = 4 + (verify->ve_attrlen >> 2);
922 buf = kmalloc(count << 2, GFP_KERNEL);
923 if (!buf)
924 return nfserr_resource;
925
926 status = nfsd4_encode_fattr(&cstate->current_fh,
927 cstate->current_fh.fh_export,
928 cstate->current_fh.fh_dentry, buf,
929 &count, verify->ve_bmval,
930 rqstp, 0);
931
932 /* this means that nfsd4_encode_fattr() ran out of space */
933 if (status == nfserr_resource && count == 0)
934 status = nfserr_not_same;
935 if (status)
936 goto out_kfree;
937
938 /* skip bitmap */
939 p = buf + 1 + ntohl(buf[0]);
940 status = nfserr_not_same;
941 if (ntohl(*p++) != verify->ve_attrlen)
942 goto out_kfree;
943 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
944 status = nfserr_same;
945
946 out_kfree:
947 kfree(buf);
948 return status;
949 }
950
951 static __be32
952 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
953 struct nfsd4_verify *verify)
954 {
955 __be32 status;
956
957 status = _nfsd4_verify(rqstp, cstate, verify);
958 return status == nfserr_not_same ? nfs_ok : status;
959 }
960
961 static __be32
962 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
963 struct nfsd4_verify *verify)
964 {
965 __be32 status;
966
967 status = _nfsd4_verify(rqstp, cstate, verify);
968 return status == nfserr_same ? nfs_ok : status;
969 }
970
971 /*
972 * NULL call.
973 */
974 static __be32
975 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
976 {
977 return nfs_ok;
978 }
979
980 static inline void nfsd4_increment_op_stats(u32 opnum)
981 {
982 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
983 nfsdstats.nfs4_opcount[opnum]++;
984 }
985
986 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
987 void *);
988 enum nfsd4_op_flags {
989 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
990 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
991 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
992 /* For rfc 5661 section 2.6.3.1.1: */
993 OP_HANDLES_WRONGSEC = 1 << 3,
994 OP_IS_PUTFH_LIKE = 1 << 4,
995 };
996
997 struct nfsd4_operation {
998 nfsd4op_func op_func;
999 u32 op_flags;
1000 char *op_name;
1001 };
1002
1003 static struct nfsd4_operation nfsd4_ops[];
1004
1005 static const char *nfsd4_op_name(unsigned opnum);
1006
1007 /*
1008 * Enforce NFSv4.1 COMPOUND ordering rules:
1009 *
1010 * Also note, enforced elsewhere:
1011 * - SEQUENCE other than as first op results in
1012 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1013 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1014 * (Enforced in nfsd4_bind_conn_to_session().)
1015 * - DESTROY_SESSION must be the final operation in a compound, if
1016 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1017 * (Enforced in nfsd4_destroy_session().)
1018 */
1019 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1020 {
1021 struct nfsd4_op *op = &args->ops[0];
1022
1023 /* These ordering requirements don't apply to NFSv4.0: */
1024 if (args->minorversion == 0)
1025 return nfs_ok;
1026 /* This is weird, but OK, not our problem: */
1027 if (args->opcnt == 0)
1028 return nfs_ok;
1029 if (op->status == nfserr_op_illegal)
1030 return nfs_ok;
1031 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1032 return nfserr_op_not_in_session;
1033 if (op->opnum == OP_SEQUENCE)
1034 return nfs_ok;
1035 if (args->opcnt != 1)
1036 return nfserr_not_only_op;
1037 return nfs_ok;
1038 }
1039
1040 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1041 {
1042 return &nfsd4_ops[op->opnum];
1043 }
1044
1045 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1046 {
1047 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1048 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1049 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1050 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1051 struct nfsd4_operation *thisd;
1052 struct nfsd4_operation *nextd;
1053
1054 thisd = OPDESC(this);
1055 /*
1056 * Most ops check wronsec on our own; only the putfh-like ops
1057 * have special rules.
1058 */
1059 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1060 return false;
1061 /*
1062 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1063 * put-filehandle operation if we're not going to use the
1064 * result:
1065 */
1066 if (argp->opcnt == resp->opcnt)
1067 return false;
1068
1069 nextd = OPDESC(next);
1070 /*
1071 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1072 * errors themselves as necessary; others should check for them
1073 * now:
1074 */
1075 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1076 }
1077
1078 /*
1079 * COMPOUND call.
1080 */
1081 static __be32
1082 nfsd4_proc_compound(struct svc_rqst *rqstp,
1083 struct nfsd4_compoundargs *args,
1084 struct nfsd4_compoundres *resp)
1085 {
1086 struct nfsd4_op *op;
1087 struct nfsd4_operation *opdesc;
1088 struct nfsd4_compound_state *cstate = &resp->cstate;
1089 int slack_bytes;
1090 __be32 status;
1091
1092 resp->xbuf = &rqstp->rq_res;
1093 resp->p = rqstp->rq_res.head[0].iov_base +
1094 rqstp->rq_res.head[0].iov_len;
1095 resp->tagp = resp->p;
1096 /* reserve space for: taglen, tag, and opcnt */
1097 resp->p += 2 + XDR_QUADLEN(args->taglen);
1098 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1099 resp->taglen = args->taglen;
1100 resp->tag = args->tag;
1101 resp->opcnt = 0;
1102 resp->rqstp = rqstp;
1103 resp->cstate.minorversion = args->minorversion;
1104 resp->cstate.replay_owner = NULL;
1105 resp->cstate.session = NULL;
1106 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1107 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1108 /*
1109 * Don't use the deferral mechanism for NFSv4; compounds make it
1110 * too hard to avoid non-idempotency problems.
1111 */
1112 rqstp->rq_usedeferral = 0;
1113
1114 /*
1115 * According to RFC3010, this takes precedence over all other errors.
1116 */
1117 status = nfserr_minor_vers_mismatch;
1118 if (args->minorversion > nfsd_supported_minorversion)
1119 goto out;
1120
1121 status = nfs41_check_op_ordering(args);
1122 if (status) {
1123 op = &args->ops[0];
1124 op->status = status;
1125 goto encode_op;
1126 }
1127
1128 while (!status && resp->opcnt < args->opcnt) {
1129 op = &args->ops[resp->opcnt++];
1130
1131 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1132 resp->opcnt, args->opcnt, op->opnum,
1133 nfsd4_op_name(op->opnum));
1134 /*
1135 * The XDR decode routines may have pre-set op->status;
1136 * for example, if there is a miscellaneous XDR error
1137 * it will be set to nfserr_bad_xdr.
1138 */
1139 if (op->status)
1140 goto encode_op;
1141
1142 /* We must be able to encode a successful response to
1143 * this operation, with enough room left over to encode a
1144 * failed response to the next operation. If we don't
1145 * have enough room, fail with ERR_RESOURCE.
1146 */
1147 slack_bytes = (char *)resp->end - (char *)resp->p;
1148 if (slack_bytes < COMPOUND_SLACK_SPACE
1149 + COMPOUND_ERR_SLACK_SPACE) {
1150 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1151 op->status = nfserr_resource;
1152 goto encode_op;
1153 }
1154
1155 opdesc = OPDESC(op);
1156
1157 if (!cstate->current_fh.fh_dentry) {
1158 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1159 op->status = nfserr_nofilehandle;
1160 goto encode_op;
1161 }
1162 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1163 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1164 op->status = nfserr_moved;
1165 goto encode_op;
1166 }
1167
1168 if (opdesc->op_func)
1169 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1170 else
1171 BUG_ON(op->status == nfs_ok);
1172
1173 if (!op->status && need_wrongsec_check(rqstp))
1174 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1175
1176 encode_op:
1177 /* Only from SEQUENCE */
1178 if (resp->cstate.status == nfserr_replay_cache) {
1179 dprintk("%s NFS4.1 replay from cache\n", __func__);
1180 status = op->status;
1181 goto out;
1182 }
1183 if (op->status == nfserr_replay_me) {
1184 op->replay = &cstate->replay_owner->so_replay;
1185 nfsd4_encode_replay(resp, op);
1186 status = op->status = op->replay->rp_status;
1187 } else {
1188 nfsd4_encode_operation(resp, op);
1189 status = op->status;
1190 }
1191
1192 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1193 args->ops, args->opcnt, resp->opcnt, op->opnum,
1194 be32_to_cpu(status));
1195
1196 if (cstate->replay_owner) {
1197 nfs4_put_stateowner(cstate->replay_owner);
1198 cstate->replay_owner = NULL;
1199 }
1200 /* XXX Ugh, we need to get rid of this kind of special case: */
1201 if (op->opnum == OP_READ && op->u.read.rd_filp)
1202 fput(op->u.read.rd_filp);
1203
1204 nfsd4_increment_op_stats(op->opnum);
1205 }
1206
1207 resp->cstate.status = status;
1208 fh_put(&resp->cstate.current_fh);
1209 fh_put(&resp->cstate.save_fh);
1210 BUG_ON(resp->cstate.replay_owner);
1211 out:
1212 nfsd4_release_compoundargs(args);
1213 /* Reset deferral mechanism for RPC deferrals */
1214 rqstp->rq_usedeferral = 1;
1215 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1216 return status;
1217 }
1218
1219 static struct nfsd4_operation nfsd4_ops[] = {
1220 [OP_ACCESS] = {
1221 .op_func = (nfsd4op_func)nfsd4_access,
1222 .op_name = "OP_ACCESS",
1223 },
1224 [OP_CLOSE] = {
1225 .op_func = (nfsd4op_func)nfsd4_close,
1226 .op_name = "OP_CLOSE",
1227 },
1228 [OP_COMMIT] = {
1229 .op_func = (nfsd4op_func)nfsd4_commit,
1230 .op_name = "OP_COMMIT",
1231 },
1232 [OP_CREATE] = {
1233 .op_func = (nfsd4op_func)nfsd4_create,
1234 .op_name = "OP_CREATE",
1235 },
1236 [OP_DELEGRETURN] = {
1237 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1238 .op_name = "OP_DELEGRETURN",
1239 },
1240 [OP_GETATTR] = {
1241 .op_func = (nfsd4op_func)nfsd4_getattr,
1242 .op_flags = ALLOWED_ON_ABSENT_FS,
1243 .op_name = "OP_GETATTR",
1244 },
1245 [OP_GETFH] = {
1246 .op_func = (nfsd4op_func)nfsd4_getfh,
1247 .op_name = "OP_GETFH",
1248 },
1249 [OP_LINK] = {
1250 .op_func = (nfsd4op_func)nfsd4_link,
1251 .op_name = "OP_LINK",
1252 },
1253 [OP_LOCK] = {
1254 .op_func = (nfsd4op_func)nfsd4_lock,
1255 .op_name = "OP_LOCK",
1256 },
1257 [OP_LOCKT] = {
1258 .op_func = (nfsd4op_func)nfsd4_lockt,
1259 .op_name = "OP_LOCKT",
1260 },
1261 [OP_LOCKU] = {
1262 .op_func = (nfsd4op_func)nfsd4_locku,
1263 .op_name = "OP_LOCKU",
1264 },
1265 [OP_LOOKUP] = {
1266 .op_func = (nfsd4op_func)nfsd4_lookup,
1267 .op_flags = OP_HANDLES_WRONGSEC,
1268 .op_name = "OP_LOOKUP",
1269 },
1270 [OP_LOOKUPP] = {
1271 .op_func = (nfsd4op_func)nfsd4_lookupp,
1272 .op_flags = OP_HANDLES_WRONGSEC,
1273 .op_name = "OP_LOOKUPP",
1274 },
1275 [OP_NVERIFY] = {
1276 .op_func = (nfsd4op_func)nfsd4_nverify,
1277 .op_name = "OP_NVERIFY",
1278 },
1279 [OP_OPEN] = {
1280 .op_func = (nfsd4op_func)nfsd4_open,
1281 .op_flags = OP_HANDLES_WRONGSEC,
1282 .op_name = "OP_OPEN",
1283 },
1284 [OP_OPEN_CONFIRM] = {
1285 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1286 .op_name = "OP_OPEN_CONFIRM",
1287 },
1288 [OP_OPEN_DOWNGRADE] = {
1289 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1290 .op_name = "OP_OPEN_DOWNGRADE",
1291 },
1292 [OP_PUTFH] = {
1293 .op_func = (nfsd4op_func)nfsd4_putfh,
1294 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1295 | OP_IS_PUTFH_LIKE,
1296 .op_name = "OP_PUTFH",
1297 },
1298 [OP_PUTPUBFH] = {
1299 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1301 | OP_IS_PUTFH_LIKE,
1302 .op_name = "OP_PUTPUBFH",
1303 },
1304 [OP_PUTROOTFH] = {
1305 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1306 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1307 | OP_IS_PUTFH_LIKE,
1308 .op_name = "OP_PUTROOTFH",
1309 },
1310 [OP_READ] = {
1311 .op_func = (nfsd4op_func)nfsd4_read,
1312 .op_name = "OP_READ",
1313 },
1314 [OP_READDIR] = {
1315 .op_func = (nfsd4op_func)nfsd4_readdir,
1316 .op_name = "OP_READDIR",
1317 },
1318 [OP_READLINK] = {
1319 .op_func = (nfsd4op_func)nfsd4_readlink,
1320 .op_name = "OP_READLINK",
1321 },
1322 [OP_REMOVE] = {
1323 .op_func = (nfsd4op_func)nfsd4_remove,
1324 .op_name = "OP_REMOVE",
1325 },
1326 [OP_RENAME] = {
1327 .op_name = "OP_RENAME",
1328 .op_func = (nfsd4op_func)nfsd4_rename,
1329 },
1330 [OP_RENEW] = {
1331 .op_func = (nfsd4op_func)nfsd4_renew,
1332 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1333 .op_name = "OP_RENEW",
1334 },
1335 [OP_RESTOREFH] = {
1336 .op_func = (nfsd4op_func)nfsd4_restorefh,
1337 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1338 | OP_IS_PUTFH_LIKE,
1339 .op_name = "OP_RESTOREFH",
1340 },
1341 [OP_SAVEFH] = {
1342 .op_func = (nfsd4op_func)nfsd4_savefh,
1343 .op_flags = OP_HANDLES_WRONGSEC,
1344 .op_name = "OP_SAVEFH",
1345 },
1346 [OP_SECINFO] = {
1347 .op_func = (nfsd4op_func)nfsd4_secinfo,
1348 .op_flags = OP_HANDLES_WRONGSEC,
1349 .op_name = "OP_SECINFO",
1350 },
1351 [OP_SETATTR] = {
1352 .op_func = (nfsd4op_func)nfsd4_setattr,
1353 .op_name = "OP_SETATTR",
1354 },
1355 [OP_SETCLIENTID] = {
1356 .op_func = (nfsd4op_func)nfsd4_setclientid,
1357 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1358 .op_name = "OP_SETCLIENTID",
1359 },
1360 [OP_SETCLIENTID_CONFIRM] = {
1361 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1362 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1363 .op_name = "OP_SETCLIENTID_CONFIRM",
1364 },
1365 [OP_VERIFY] = {
1366 .op_func = (nfsd4op_func)nfsd4_verify,
1367 .op_name = "OP_VERIFY",
1368 },
1369 [OP_WRITE] = {
1370 .op_func = (nfsd4op_func)nfsd4_write,
1371 .op_name = "OP_WRITE",
1372 },
1373 [OP_RELEASE_LOCKOWNER] = {
1374 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1375 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1376 .op_name = "OP_RELEASE_LOCKOWNER",
1377 },
1378
1379 /* NFSv4.1 operations */
1380 [OP_EXCHANGE_ID] = {
1381 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1382 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1383 .op_name = "OP_EXCHANGE_ID",
1384 },
1385 [OP_BIND_CONN_TO_SESSION] = {
1386 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1387 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1388 .op_name = "OP_BIND_CONN_TO_SESSION",
1389 },
1390 [OP_CREATE_SESSION] = {
1391 .op_func = (nfsd4op_func)nfsd4_create_session,
1392 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1393 .op_name = "OP_CREATE_SESSION",
1394 },
1395 [OP_DESTROY_SESSION] = {
1396 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1397 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1398 .op_name = "OP_DESTROY_SESSION",
1399 },
1400 [OP_SEQUENCE] = {
1401 .op_func = (nfsd4op_func)nfsd4_sequence,
1402 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1403 .op_name = "OP_SEQUENCE",
1404 },
1405 [OP_RECLAIM_COMPLETE] = {
1406 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1407 .op_flags = ALLOWED_WITHOUT_FH,
1408 .op_name = "OP_RECLAIM_COMPLETE",
1409 },
1410 [OP_SECINFO_NO_NAME] = {
1411 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1412 .op_flags = OP_HANDLES_WRONGSEC,
1413 .op_name = "OP_SECINFO_NO_NAME",
1414 },
1415 };
1416
1417 static const char *nfsd4_op_name(unsigned opnum)
1418 {
1419 if (opnum < ARRAY_SIZE(nfsd4_ops))
1420 return nfsd4_ops[opnum].op_name;
1421 return "unknown_operation";
1422 }
1423
1424 #define nfsd4_voidres nfsd4_voidargs
1425 struct nfsd4_voidargs { int dummy; };
1426
1427 /*
1428 * TODO: At the present time, the NFSv4 server does not do XID caching
1429 * of requests. Implementing XID caching would not be a serious problem,
1430 * although it would require a mild change in interfaces since one
1431 * doesn't know whether an NFSv4 request is idempotent until after the
1432 * XDR decode. However, XID caching totally confuses pynfs (Peter
1433 * Astrand's regression testsuite for NFSv4 servers), which reuses
1434 * XID's liberally, so I've left it unimplemented until pynfs generates
1435 * better XID's.
1436 */
1437 static struct svc_procedure nfsd_procedures4[2] = {
1438 [NFSPROC4_NULL] = {
1439 .pc_func = (svc_procfunc) nfsd4_proc_null,
1440 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1441 .pc_argsize = sizeof(struct nfsd4_voidargs),
1442 .pc_ressize = sizeof(struct nfsd4_voidres),
1443 .pc_cachetype = RC_NOCACHE,
1444 .pc_xdrressize = 1,
1445 },
1446 [NFSPROC4_COMPOUND] = {
1447 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1448 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1449 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1450 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1451 .pc_ressize = sizeof(struct nfsd4_compoundres),
1452 .pc_cachetype = RC_NOCACHE,
1453 .pc_xdrressize = NFSD_BUFSIZE/4,
1454 },
1455 };
1456
1457 struct svc_version nfsd_version4 = {
1458 .vs_vers = 4,
1459 .vs_nproc = 2,
1460 .vs_proc = nfsd_procedures4,
1461 .vs_dispatch = nfsd_dispatch,
1462 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1463 };
1464
1465 /*
1466 * Local variables:
1467 * c-basic-offset: 8
1468 * End:
1469 */
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