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ASoC: wm8996: Remove some volatile regisers from the defaults table
[linux-2.6/libata-dev.git] / fs / nfsd / nfs4proc.c
blob896da74ec5634fd92739e0284f5d0768c8f12437
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 "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42
43 #define NFSDDBG_FACILITY NFSDDBG_PROC
44
45 static u32 nfsd_attrmask[] = {
46 NFSD_WRITEABLE_ATTRS_WORD0,
47 NFSD_WRITEABLE_ATTRS_WORD1,
48 NFSD_WRITEABLE_ATTRS_WORD2
49 };
50
51 static u32 nfsd41_ex_attrmask[] = {
52 NFSD_SUPPATTR_EXCLCREAT_WORD0,
53 NFSD_SUPPATTR_EXCLCREAT_WORD1,
54 NFSD_SUPPATTR_EXCLCREAT_WORD2
55 };
56
57 static __be32
58 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
59 u32 *bmval, u32 *writable)
60 {
61 struct dentry *dentry = cstate->current_fh.fh_dentry;
62
63 /*
64 * Check about attributes are supported by the NFSv4 server or not.
65 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
66 */
67 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
68 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
69 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
70 return nfserr_attrnotsupp;
71
72 /*
73 * Check FATTR4_WORD0_ACL can be supported
74 * in current environment or not.
75 */
76 if (bmval[0] & FATTR4_WORD0_ACL) {
77 if (!IS_POSIXACL(dentry->d_inode))
78 return nfserr_attrnotsupp;
79 }
80
81 /*
82 * According to spec, read-only attributes return ERR_INVAL.
83 */
84 if (writable) {
85 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
86 (bmval[2] & ~writable[2]))
87 return nfserr_inval;
88 }
89
90 return nfs_ok;
91 }
92
93 static __be32
94 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
95 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
96 {
97 __be32 status = nfs_ok;
98
99 if (open->op_create == NFS4_OPEN_CREATE) {
100 if (open->op_createmode == NFS4_CREATE_UNCHECKED
101 || open->op_createmode == NFS4_CREATE_GUARDED)
102 status = check_attr_support(rqstp, cstate,
103 open->op_bmval, nfsd_attrmask);
104 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
105 status = check_attr_support(rqstp, cstate,
106 open->op_bmval, nfsd41_ex_attrmask);
107 }
108
109 return status;
110 }
111
112 static int
113 is_create_with_attrs(struct nfsd4_open *open)
114 {
115 return open->op_create == NFS4_OPEN_CREATE
116 && (open->op_createmode == NFS4_CREATE_UNCHECKED
117 || open->op_createmode == NFS4_CREATE_GUARDED
118 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
119 }
120
121 /*
122 * if error occurs when setting the acl, just clear the acl bit
123 * in the returned attr bitmap.
124 */
125 static void
126 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
127 struct nfs4_acl *acl, u32 *bmval)
128 {
129 __be32 status;
130
131 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
132 if (status)
133 /*
134 * We should probably fail the whole open at this point,
135 * but we've already created the file, so it's too late;
136 * So this seems the least of evils:
137 */
138 bmval[0] &= ~FATTR4_WORD0_ACL;
139 }
140
141 static inline void
142 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
143 {
144 fh_put(dst);
145 dget(src->fh_dentry);
146 if (src->fh_export)
147 cache_get(&src->fh_export->h);
148 *dst = *src;
149 }
150
151 static __be32
152 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
153 {
154 __be32 status;
155
156 if (open->op_truncate &&
157 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
158 return nfserr_inval;
159
160 accmode |= NFSD_MAY_READ_IF_EXEC;
161
162 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
163 accmode |= NFSD_MAY_READ;
164 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
165 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
166 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
167 accmode |= NFSD_MAY_WRITE;
168
169 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
170
171 return status;
172 }
173
174 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
175 {
176 umode_t mode = fh->fh_dentry->d_inode->i_mode;
177
178 if (S_ISREG(mode))
179 return nfs_ok;
180 if (S_ISDIR(mode))
181 return nfserr_isdir;
182 /*
183 * Using err_symlink as our catch-all case may look odd; but
184 * there's no other obvious error for this case in 4.0, and we
185 * happen to know that it will cause the linux v4 client to do
186 * the right thing on attempts to open something other than a
187 * regular file.
188 */
189 return nfserr_symlink;
190 }
191
192 static __be32
193 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
194 {
195 struct svc_fh resfh;
196 __be32 status;
197
198 fh_init(&resfh, NFS4_FHSIZE);
199 open->op_truncate = 0;
200
201 if (open->op_create) {
202 /* FIXME: check session persistence and pnfs flags.
203 * The nfsv4.1 spec requires the following semantics:
204 *
205 * Persistent | pNFS | Server REQUIRED | Client Allowed
206 * Reply Cache | server | |
207 * -------------+--------+-----------------+--------------------
208 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
209 * | | | (SHOULD)
210 * | | and EXCLUSIVE4 | or EXCLUSIVE4
211 * | | | (SHOULD NOT)
212 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
213 * yes | no | GUARDED4 | GUARDED4
214 * yes | yes | GUARDED4 | GUARDED4
215 */
216
217 /*
218 * Note: create modes (UNCHECKED,GUARDED...) are the same
219 * in NFSv4 as in v3 except EXCLUSIVE4_1.
220 */
221 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
222 open->op_fname.len, &open->op_iattr,
223 &resfh, open->op_createmode,
224 (u32 *)open->op_verf.data,
225 &open->op_truncate, &open->op_created);
226
227 /*
228 * Following rfc 3530 14.2.16, use the returned bitmask
229 * to indicate which attributes we used to store the
230 * verifier:
231 */
232 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
233 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
234 FATTR4_WORD1_TIME_MODIFY);
235 } else {
236 status = nfsd_lookup(rqstp, current_fh,
237 open->op_fname.data, open->op_fname.len, &resfh);
238 fh_unlock(current_fh);
239 if (status)
240 goto out;
241 status = nfsd_check_obj_isreg(&resfh);
242 }
243 if (status)
244 goto out;
245
246 if (is_create_with_attrs(open) && open->op_acl != NULL)
247 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
248
249 set_change_info(&open->op_cinfo, current_fh);
250 fh_dup2(current_fh, &resfh);
251
252 /* set reply cache */
253 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
254 &resfh.fh_handle);
255 if (!open->op_created)
256 status = do_open_permission(rqstp, current_fh, open,
257 NFSD_MAY_NOP);
258
259 out:
260 fh_put(&resfh);
261 return status;
262 }
263
264 static __be32
265 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
266 {
267 __be32 status;
268
269 /* We don't know the target directory, and therefore can not
270 * set the change info
271 */
272
273 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
274
275 /* set replay cache */
276 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
277 &current_fh->fh_handle);
278
279 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
280 (open->op_iattr.ia_size == 0);
281
282 status = do_open_permission(rqstp, current_fh, open,
283 NFSD_MAY_OWNER_OVERRIDE);
284
285 return status;
286 }
287
288 static void
289 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
290 {
291 struct nfsd4_sessionid *sid =
292 (struct nfsd4_sessionid *)session->se_sessionid.data;
293
294 clid->cl_boot = sid->clientid.cl_boot;
295 clid->cl_id = sid->clientid.cl_id;
296 }
297
298 static __be32
299 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
300 struct nfsd4_open *open)
301 {
302 __be32 status;
303 struct nfsd4_compoundres *resp;
304
305 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
306 (int)open->op_fname.len, open->op_fname.data,
307 open->op_openowner);
308
309 /* This check required by spec. */
310 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
311 return nfserr_inval;
312
313 /* We don't yet support WANT bits: */
314 open->op_share_access &= NFS4_SHARE_ACCESS_MASK;
315
316 open->op_created = 0;
317 /*
318 * RFC5661 18.51.3
319 * Before RECLAIM_COMPLETE done, server should deny new lock
320 */
321 if (nfsd4_has_session(cstate) &&
322 !cstate->session->se_client->cl_firststate &&
323 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
324 return nfserr_grace;
325
326 if (nfsd4_has_session(cstate))
327 copy_clientid(&open->op_clientid, cstate->session);
328
329 nfs4_lock_state();
330
331 /* check seqid for replay. set nfs4_owner */
332 resp = rqstp->rq_resp;
333 status = nfsd4_process_open1(&resp->cstate, open);
334 if (status == nfserr_replay_me) {
335 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
336 fh_put(&cstate->current_fh);
337 fh_copy_shallow(&cstate->current_fh.fh_handle,
338 &rp->rp_openfh);
339 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
340 if (status)
341 dprintk("nfsd4_open: replay failed"
342 " restoring previous filehandle\n");
343 else
344 status = nfserr_replay_me;
345 }
346 if (status)
347 goto out;
348
349 status = nfsd4_check_open_attributes(rqstp, cstate, open);
350 if (status)
351 goto out;
352
353 /* Openowner is now set, so sequence id will get bumped. Now we need
354 * these checks before we do any creates: */
355 status = nfserr_grace;
356 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
357 goto out;
358 status = nfserr_no_grace;
359 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
360 goto out;
361
362 switch (open->op_claim_type) {
363 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
364 case NFS4_OPEN_CLAIM_NULL:
365 status = do_open_lookup(rqstp, &cstate->current_fh,
366 open);
367 if (status)
368 goto out;
369 break;
370 case NFS4_OPEN_CLAIM_PREVIOUS:
371 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
372 status = nfs4_check_open_reclaim(&open->op_clientid);
373 if (status)
374 goto out;
375 case NFS4_OPEN_CLAIM_FH:
376 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
377 status = do_open_fhandle(rqstp, &cstate->current_fh,
378 open);
379 if (status)
380 goto out;
381 break;
382 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
383 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
384 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
385 dprintk("NFSD: unsupported OPEN claim type %d\n",
386 open->op_claim_type);
387 status = nfserr_notsupp;
388 goto out;
389 default:
390 dprintk("NFSD: Invalid OPEN claim type %d\n",
391 open->op_claim_type);
392 status = nfserr_inval;
393 goto out;
394 }
395 /*
396 * nfsd4_process_open2() does the actual opening of the file. If
397 * successful, it (1) truncates the file if open->op_truncate was
398 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
399 */
400 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
401 WARN_ON(status && open->op_created);
402 out:
403 nfsd4_cleanup_open_state(open, status);
404 if (open->op_openowner)
405 cstate->replay_owner = &open->op_openowner->oo_owner;
406 else
407 nfs4_unlock_state();
408 return status;
409 }
410
411 /*
412 * filehandle-manipulating ops.
413 */
414 static __be32
415 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
416 struct svc_fh **getfh)
417 {
418 if (!cstate->current_fh.fh_dentry)
419 return nfserr_nofilehandle;
420
421 *getfh = &cstate->current_fh;
422 return nfs_ok;
423 }
424
425 static __be32
426 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
427 struct nfsd4_putfh *putfh)
428 {
429 fh_put(&cstate->current_fh);
430 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
431 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
432 putfh->pf_fhlen);
433 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
434 }
435
436 static __be32
437 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
438 void *arg)
439 {
440 __be32 status;
441
442 fh_put(&cstate->current_fh);
443 status = exp_pseudoroot(rqstp, &cstate->current_fh);
444 return status;
445 }
446
447 static __be32
448 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
449 void *arg)
450 {
451 if (!cstate->save_fh.fh_dentry)
452 return nfserr_restorefh;
453
454 fh_dup2(&cstate->current_fh, &cstate->save_fh);
455 return nfs_ok;
456 }
457
458 static __be32
459 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
460 void *arg)
461 {
462 if (!cstate->current_fh.fh_dentry)
463 return nfserr_nofilehandle;
464
465 fh_dup2(&cstate->save_fh, &cstate->current_fh);
466 return nfs_ok;
467 }
468
469 /*
470 * misc nfsv4 ops
471 */
472 static __be32
473 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
474 struct nfsd4_access *access)
475 {
476 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
477 return nfserr_inval;
478
479 access->ac_resp_access = access->ac_req_access;
480 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
481 &access->ac_supported);
482 }
483
484 static __be32
485 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
486 struct nfsd4_commit *commit)
487 {
488 u32 *p = (u32 *)commit->co_verf.data;
489 *p++ = nfssvc_boot.tv_sec;
490 *p++ = nfssvc_boot.tv_usec;
491
492 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
493 commit->co_count);
494 }
495
496 static __be32
497 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
498 struct nfsd4_create *create)
499 {
500 struct svc_fh resfh;
501 __be32 status;
502 dev_t rdev;
503
504 fh_init(&resfh, NFS4_FHSIZE);
505
506 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
507 NFSD_MAY_CREATE);
508 if (status)
509 return status;
510
511 status = check_attr_support(rqstp, cstate, create->cr_bmval,
512 nfsd_attrmask);
513 if (status)
514 return status;
515
516 switch (create->cr_type) {
517 case NF4LNK:
518 /* ugh! we have to null-terminate the linktext, or
519 * vfs_symlink() will choke. it is always safe to
520 * null-terminate by brute force, since at worst we
521 * will overwrite the first byte of the create namelen
522 * in the XDR buffer, which has already been extracted
523 * during XDR decode.
524 */
525 create->cr_linkname[create->cr_linklen] = 0;
526
527 status = nfsd_symlink(rqstp, &cstate->current_fh,
528 create->cr_name, create->cr_namelen,
529 create->cr_linkname, create->cr_linklen,
530 &resfh, &create->cr_iattr);
531 break;
532
533 case NF4BLK:
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_IFBLK, rdev, &resfh);
541 break;
542
543 case NF4CHR:
544 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
545 if (MAJOR(rdev) != create->cr_specdata1 ||
546 MINOR(rdev) != create->cr_specdata2)
547 return nfserr_inval;
548 status = nfsd_create(rqstp, &cstate->current_fh,
549 create->cr_name, create->cr_namelen,
550 &create->cr_iattr,S_IFCHR, rdev, &resfh);
551 break;
552
553 case NF4SOCK:
554 status = nfsd_create(rqstp, &cstate->current_fh,
555 create->cr_name, create->cr_namelen,
556 &create->cr_iattr, S_IFSOCK, 0, &resfh);
557 break;
558
559 case NF4FIFO:
560 status = nfsd_create(rqstp, &cstate->current_fh,
561 create->cr_name, create->cr_namelen,
562 &create->cr_iattr, S_IFIFO, 0, &resfh);
563 break;
564
565 case NF4DIR:
566 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
567 status = nfsd_create(rqstp, &cstate->current_fh,
568 create->cr_name, create->cr_namelen,
569 &create->cr_iattr, S_IFDIR, 0, &resfh);
570 break;
571
572 default:
573 status = nfserr_badtype;
574 }
575
576 if (status)
577 goto out;
578
579 if (create->cr_acl != NULL)
580 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
581 create->cr_bmval);
582
583 fh_unlock(&cstate->current_fh);
584 set_change_info(&create->cr_cinfo, &cstate->current_fh);
585 fh_dup2(&cstate->current_fh, &resfh);
586 out:
587 fh_put(&resfh);
588 return status;
589 }
590
591 static __be32
592 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
593 struct nfsd4_getattr *getattr)
594 {
595 __be32 status;
596
597 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
598 if (status)
599 return status;
600
601 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
602 return nfserr_inval;
603
604 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
605 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
606 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
607
608 getattr->ga_fhp = &cstate->current_fh;
609 return nfs_ok;
610 }
611
612 static __be32
613 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
614 struct nfsd4_link *link)
615 {
616 __be32 status = nfserr_nofilehandle;
617
618 if (!cstate->save_fh.fh_dentry)
619 return status;
620 status = nfsd_link(rqstp, &cstate->current_fh,
621 link->li_name, link->li_namelen, &cstate->save_fh);
622 if (!status)
623 set_change_info(&link->li_cinfo, &cstate->current_fh);
624 return status;
625 }
626
627 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
628 {
629 struct svc_fh tmp_fh;
630 __be32 ret;
631
632 fh_init(&tmp_fh, NFS4_FHSIZE);
633 ret = exp_pseudoroot(rqstp, &tmp_fh);
634 if (ret)
635 return ret;
636 if (tmp_fh.fh_dentry == fh->fh_dentry) {
637 fh_put(&tmp_fh);
638 return nfserr_noent;
639 }
640 fh_put(&tmp_fh);
641 return nfsd_lookup(rqstp, fh, "..", 2, fh);
642 }
643
644 static __be32
645 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
646 void *arg)
647 {
648 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
649 }
650
651 static __be32
652 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
653 struct nfsd4_lookup *lookup)
654 {
655 return nfsd_lookup(rqstp, &cstate->current_fh,
656 lookup->lo_name, lookup->lo_len,
657 &cstate->current_fh);
658 }
659
660 static __be32
661 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
662 struct nfsd4_read *read)
663 {
664 __be32 status;
665
666 /* no need to check permission - this will be done in nfsd_read() */
667
668 read->rd_filp = NULL;
669 if (read->rd_offset >= OFFSET_MAX)
670 return nfserr_inval;
671
672 nfs4_lock_state();
673 /* check stateid */
674 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
675 RD_STATE, &read->rd_filp))) {
676 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
677 goto out;
678 }
679 if (read->rd_filp)
680 get_file(read->rd_filp);
681 status = nfs_ok;
682 out:
683 nfs4_unlock_state();
684 read->rd_rqstp = rqstp;
685 read->rd_fhp = &cstate->current_fh;
686 return status;
687 }
688
689 static __be32
690 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
691 struct nfsd4_readdir *readdir)
692 {
693 u64 cookie = readdir->rd_cookie;
694 static const nfs4_verifier zeroverf;
695
696 /* no need to check permission - this will be done in nfsd_readdir() */
697
698 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
699 return nfserr_inval;
700
701 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
702 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
703 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
704
705 if ((cookie == 1) || (cookie == 2) ||
706 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
707 return nfserr_bad_cookie;
708
709 readdir->rd_rqstp = rqstp;
710 readdir->rd_fhp = &cstate->current_fh;
711 return nfs_ok;
712 }
713
714 static __be32
715 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
716 struct nfsd4_readlink *readlink)
717 {
718 readlink->rl_rqstp = rqstp;
719 readlink->rl_fhp = &cstate->current_fh;
720 return nfs_ok;
721 }
722
723 static __be32
724 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
725 struct nfsd4_remove *remove)
726 {
727 __be32 status;
728
729 if (locks_in_grace())
730 return nfserr_grace;
731 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
732 remove->rm_name, remove->rm_namelen);
733 if (!status) {
734 fh_unlock(&cstate->current_fh);
735 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
736 }
737 return status;
738 }
739
740 static __be32
741 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 struct nfsd4_rename *rename)
743 {
744 __be32 status = nfserr_nofilehandle;
745
746 if (!cstate->save_fh.fh_dentry)
747 return status;
748 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
749 & NFSEXP_NOSUBTREECHECK))
750 return nfserr_grace;
751 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
752 rename->rn_snamelen, &cstate->current_fh,
753 rename->rn_tname, rename->rn_tnamelen);
754
755 /* the underlying filesystem returns different error's than required
756 * by NFSv4. both save_fh and current_fh have been verified.. */
757 if (status == nfserr_isdir)
758 status = nfserr_exist;
759 else if ((status == nfserr_notdir) &&
760 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
761 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
762 status = nfserr_exist;
763
764 if (!status) {
765 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
766 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
767 }
768 return status;
769 }
770
771 static __be32
772 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
773 struct nfsd4_secinfo *secinfo)
774 {
775 struct svc_fh resfh;
776 struct svc_export *exp;
777 struct dentry *dentry;
778 __be32 err;
779
780 fh_init(&resfh, NFS4_FHSIZE);
781 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
782 if (err)
783 return err;
784 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
785 secinfo->si_name, secinfo->si_namelen,
786 &exp, &dentry);
787 if (err)
788 return err;
789 if (dentry->d_inode == NULL) {
790 exp_put(exp);
791 err = nfserr_noent;
792 } else
793 secinfo->si_exp = exp;
794 dput(dentry);
795 if (cstate->minorversion)
796 /* See rfc 5661 section 2.6.3.1.1.8 */
797 fh_put(&cstate->current_fh);
798 return err;
799 }
800
801 static __be32
802 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
803 struct nfsd4_secinfo_no_name *sin)
804 {
805 __be32 err;
806
807 switch (sin->sin_style) {
808 case NFS4_SECINFO_STYLE4_CURRENT_FH:
809 break;
810 case NFS4_SECINFO_STYLE4_PARENT:
811 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
812 if (err)
813 return err;
814 break;
815 default:
816 return nfserr_inval;
817 }
818 exp_get(cstate->current_fh.fh_export);
819 sin->sin_exp = cstate->current_fh.fh_export;
820 fh_put(&cstate->current_fh);
821 return nfs_ok;
822 }
823
824 static __be32
825 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_setattr *setattr)
827 {
828 __be32 status = nfs_ok;
829
830 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
831 nfs4_lock_state();
832 status = nfs4_preprocess_stateid_op(cstate,
833 &setattr->sa_stateid, WR_STATE, NULL);
834 nfs4_unlock_state();
835 if (status) {
836 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
837 return status;
838 }
839 }
840 status = fh_want_write(&cstate->current_fh);
841 if (status)
842 return status;
843 status = nfs_ok;
844
845 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
846 nfsd_attrmask);
847 if (status)
848 goto out;
849
850 if (setattr->sa_acl != NULL)
851 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
852 setattr->sa_acl);
853 if (status)
854 goto out;
855 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
856 0, (time_t)0);
857 out:
858 fh_drop_write(&cstate->current_fh);
859 return status;
860 }
861
862 static __be32
863 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 struct nfsd4_write *write)
865 {
866 stateid_t *stateid = &write->wr_stateid;
867 struct file *filp = NULL;
868 u32 *p;
869 __be32 status = nfs_ok;
870 unsigned long cnt;
871
872 /* no need to check permission - this will be done in nfsd_write() */
873
874 if (write->wr_offset >= OFFSET_MAX)
875 return nfserr_inval;
876
877 nfs4_lock_state();
878 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
879 if (filp)
880 get_file(filp);
881 nfs4_unlock_state();
882
883 if (status) {
884 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
885 return status;
886 }
887
888 cnt = write->wr_buflen;
889 write->wr_how_written = write->wr_stable_how;
890 p = (u32 *)write->wr_verifier.data;
891 *p++ = nfssvc_boot.tv_sec;
892 *p++ = nfssvc_boot.tv_usec;
893
894 status = nfsd_write(rqstp, &cstate->current_fh, filp,
895 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
896 &cnt, &write->wr_how_written);
897 if (filp)
898 fput(filp);
899
900 write->wr_bytes_written = cnt;
901
902 return status;
903 }
904
905 /* This routine never returns NFS_OK! If there are no other errors, it
906 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
907 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
908 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
909 */
910 static __be32
911 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
912 struct nfsd4_verify *verify)
913 {
914 __be32 *buf, *p;
915 int count;
916 __be32 status;
917
918 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
919 if (status)
920 return status;
921
922 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
923 if (status)
924 return status;
925
926 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
927 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
928 return nfserr_inval;
929 if (verify->ve_attrlen & 3)
930 return nfserr_inval;
931
932 /* count in words:
933 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
934 */
935 count = 4 + (verify->ve_attrlen >> 2);
936 buf = kmalloc(count << 2, GFP_KERNEL);
937 if (!buf)
938 return nfserr_jukebox;
939
940 status = nfsd4_encode_fattr(&cstate->current_fh,
941 cstate->current_fh.fh_export,
942 cstate->current_fh.fh_dentry, buf,
943 &count, verify->ve_bmval,
944 rqstp, 0);
945
946 /* this means that nfsd4_encode_fattr() ran out of space */
947 if (status == nfserr_resource && count == 0)
948 status = nfserr_not_same;
949 if (status)
950 goto out_kfree;
951
952 /* skip bitmap */
953 p = buf + 1 + ntohl(buf[0]);
954 status = nfserr_not_same;
955 if (ntohl(*p++) != verify->ve_attrlen)
956 goto out_kfree;
957 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
958 status = nfserr_same;
959
960 out_kfree:
961 kfree(buf);
962 return status;
963 }
964
965 static __be32
966 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
967 struct nfsd4_verify *verify)
968 {
969 __be32 status;
970
971 status = _nfsd4_verify(rqstp, cstate, verify);
972 return status == nfserr_not_same ? nfs_ok : status;
973 }
974
975 static __be32
976 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
977 struct nfsd4_verify *verify)
978 {
979 __be32 status;
980
981 status = _nfsd4_verify(rqstp, cstate, verify);
982 return status == nfserr_same ? nfs_ok : status;
983 }
984
985 /*
986 * NULL call.
987 */
988 static __be32
989 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
990 {
991 return nfs_ok;
992 }
993
994 static inline void nfsd4_increment_op_stats(u32 opnum)
995 {
996 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
997 nfsdstats.nfs4_opcount[opnum]++;
998 }
999
1000 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1001 void *);
1002 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1003
1004 enum nfsd4_op_flags {
1005 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1006 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1007 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1008 /* For rfc 5661 section 2.6.3.1.1: */
1009 OP_HANDLES_WRONGSEC = 1 << 3,
1010 OP_IS_PUTFH_LIKE = 1 << 4,
1011 /*
1012 * These are the ops whose result size we estimate before
1013 * encoding, to avoid performing an op then not being able to
1014 * respond or cache a response. This includes writes and setattrs
1015 * as well as the operations usually called "nonidempotent":
1016 */
1017 OP_MODIFIES_SOMETHING = 1 << 5,
1018 /*
1019 * Cache compounds containing these ops in the xid-based drc:
1020 * We use the DRC for compounds containing non-idempotent
1021 * operations, *except* those that are 4.1-specific (since
1022 * sessions provide their own EOS), and except for stateful
1023 * operations other than setclientid and setclientid_confirm
1024 * (since sequence numbers provide EOS for open, lock, etc in
1025 * the v4.0 case).
1026 */
1027 OP_CACHEME = 1 << 6,
1028 };
1029
1030 struct nfsd4_operation {
1031 nfsd4op_func op_func;
1032 u32 op_flags;
1033 char *op_name;
1034 /* Try to get response size before operation */
1035 nfsd4op_rsize op_rsize_bop;
1036 };
1037
1038 static struct nfsd4_operation nfsd4_ops[];
1039
1040 static const char *nfsd4_op_name(unsigned opnum);
1041
1042 /*
1043 * Enforce NFSv4.1 COMPOUND ordering rules:
1044 *
1045 * Also note, enforced elsewhere:
1046 * - SEQUENCE other than as first op results in
1047 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1048 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1049 * (Enforced in nfsd4_bind_conn_to_session().)
1050 * - DESTROY_SESSION must be the final operation in a compound, if
1051 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1052 * (Enforced in nfsd4_destroy_session().)
1053 */
1054 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1055 {
1056 struct nfsd4_op *op = &args->ops[0];
1057
1058 /* These ordering requirements don't apply to NFSv4.0: */
1059 if (args->minorversion == 0)
1060 return nfs_ok;
1061 /* This is weird, but OK, not our problem: */
1062 if (args->opcnt == 0)
1063 return nfs_ok;
1064 if (op->status == nfserr_op_illegal)
1065 return nfs_ok;
1066 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1067 return nfserr_op_not_in_session;
1068 if (op->opnum == OP_SEQUENCE)
1069 return nfs_ok;
1070 if (args->opcnt != 1)
1071 return nfserr_not_only_op;
1072 return nfs_ok;
1073 }
1074
1075 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1076 {
1077 return &nfsd4_ops[op->opnum];
1078 }
1079
1080 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1081 {
1082 return OPDESC(op)->op_flags & OP_CACHEME;
1083 }
1084
1085 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1086 {
1087 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1088 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1089 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1090 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1091 struct nfsd4_operation *thisd;
1092 struct nfsd4_operation *nextd;
1093
1094 thisd = OPDESC(this);
1095 /*
1096 * Most ops check wronsec on our own; only the putfh-like ops
1097 * have special rules.
1098 */
1099 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1100 return false;
1101 /*
1102 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1103 * put-filehandle operation if we're not going to use the
1104 * result:
1105 */
1106 if (argp->opcnt == resp->opcnt)
1107 return false;
1108
1109 nextd = OPDESC(next);
1110 /*
1111 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1112 * errors themselves as necessary; others should check for them
1113 * now:
1114 */
1115 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1116 }
1117
1118 /*
1119 * COMPOUND call.
1120 */
1121 static __be32
1122 nfsd4_proc_compound(struct svc_rqst *rqstp,
1123 struct nfsd4_compoundargs *args,
1124 struct nfsd4_compoundres *resp)
1125 {
1126 struct nfsd4_op *op;
1127 struct nfsd4_operation *opdesc;
1128 struct nfsd4_compound_state *cstate = &resp->cstate;
1129 int slack_bytes;
1130 u32 plen = 0;
1131 __be32 status;
1132
1133 resp->xbuf = &rqstp->rq_res;
1134 resp->p = rqstp->rq_res.head[0].iov_base +
1135 rqstp->rq_res.head[0].iov_len;
1136 resp->tagp = resp->p;
1137 /* reserve space for: taglen, tag, and opcnt */
1138 resp->p += 2 + XDR_QUADLEN(args->taglen);
1139 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1140 resp->taglen = args->taglen;
1141 resp->tag = args->tag;
1142 resp->opcnt = 0;
1143 resp->rqstp = rqstp;
1144 resp->cstate.minorversion = args->minorversion;
1145 resp->cstate.replay_owner = NULL;
1146 resp->cstate.session = NULL;
1147 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1148 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1149 /*
1150 * Don't use the deferral mechanism for NFSv4; compounds make it
1151 * too hard to avoid non-idempotency problems.
1152 */
1153 rqstp->rq_usedeferral = 0;
1154
1155 /*
1156 * According to RFC3010, this takes precedence over all other errors.
1157 */
1158 status = nfserr_minor_vers_mismatch;
1159 if (args->minorversion > nfsd_supported_minorversion)
1160 goto out;
1161
1162 status = nfs41_check_op_ordering(args);
1163 if (status) {
1164 op = &args->ops[0];
1165 op->status = status;
1166 goto encode_op;
1167 }
1168
1169 while (!status && resp->opcnt < args->opcnt) {
1170 op = &args->ops[resp->opcnt++];
1171
1172 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1173 resp->opcnt, args->opcnt, op->opnum,
1174 nfsd4_op_name(op->opnum));
1175 /*
1176 * The XDR decode routines may have pre-set op->status;
1177 * for example, if there is a miscellaneous XDR error
1178 * it will be set to nfserr_bad_xdr.
1179 */
1180 if (op->status)
1181 goto encode_op;
1182
1183 /* We must be able to encode a successful response to
1184 * this operation, with enough room left over to encode a
1185 * failed response to the next operation. If we don't
1186 * have enough room, fail with ERR_RESOURCE.
1187 */
1188 slack_bytes = (char *)resp->end - (char *)resp->p;
1189 if (slack_bytes < COMPOUND_SLACK_SPACE
1190 + COMPOUND_ERR_SLACK_SPACE) {
1191 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1192 op->status = nfserr_resource;
1193 goto encode_op;
1194 }
1195
1196 opdesc = OPDESC(op);
1197
1198 if (!cstate->current_fh.fh_dentry) {
1199 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1200 op->status = nfserr_nofilehandle;
1201 goto encode_op;
1202 }
1203 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1204 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1205 op->status = nfserr_moved;
1206 goto encode_op;
1207 }
1208
1209 /* If op is non-idempotent */
1210 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1211 plen = opdesc->op_rsize_bop(rqstp, op);
1212 op->status = nfsd4_check_resp_size(resp, plen);
1213 }
1214
1215 if (op->status)
1216 goto encode_op;
1217
1218 if (opdesc->op_func)
1219 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1220 else
1221 BUG_ON(op->status == nfs_ok);
1222
1223 if (!op->status && need_wrongsec_check(rqstp))
1224 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1225
1226 encode_op:
1227 /* Only from SEQUENCE */
1228 if (resp->cstate.status == nfserr_replay_cache) {
1229 dprintk("%s NFS4.1 replay from cache\n", __func__);
1230 status = op->status;
1231 goto out;
1232 }
1233 if (op->status == nfserr_replay_me) {
1234 op->replay = &cstate->replay_owner->so_replay;
1235 nfsd4_encode_replay(resp, op);
1236 status = op->status = op->replay->rp_status;
1237 } else {
1238 nfsd4_encode_operation(resp, op);
1239 status = op->status;
1240 }
1241
1242 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1243 args->ops, args->opcnt, resp->opcnt, op->opnum,
1244 be32_to_cpu(status));
1245
1246 if (cstate->replay_owner) {
1247 nfs4_unlock_state();
1248 cstate->replay_owner = NULL;
1249 }
1250 /* XXX Ugh, we need to get rid of this kind of special case: */
1251 if (op->opnum == OP_READ && op->u.read.rd_filp)
1252 fput(op->u.read.rd_filp);
1253
1254 nfsd4_increment_op_stats(op->opnum);
1255 }
1256
1257 resp->cstate.status = status;
1258 fh_put(&resp->cstate.current_fh);
1259 fh_put(&resp->cstate.save_fh);
1260 BUG_ON(resp->cstate.replay_owner);
1261 out:
1262 /* Reset deferral mechanism for RPC deferrals */
1263 rqstp->rq_usedeferral = 1;
1264 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1265 return status;
1266 }
1267
1268 #define op_encode_hdr_size (2)
1269 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1270 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1271 #define op_encode_change_info_maxsz (5)
1272 #define nfs4_fattr_bitmap_maxsz (4)
1273
1274 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1275 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1276
1277 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1278
1279 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1280 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1281 op_encode_ace_maxsz)
1282
1283 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1284
1285 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1286 {
1287 return (op_encode_hdr_size) * sizeof(__be32);
1288 }
1289
1290 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1291 {
1292 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1293 }
1294
1295 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1296 {
1297 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1298 }
1299
1300 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1301 {
1302 return (op_encode_hdr_size + op_encode_change_info_maxsz
1303 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1304 }
1305
1306 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1307 {
1308 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1309 * sizeof(__be32);
1310 }
1311
1312 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1313 {
1314 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1315 * sizeof(__be32);
1316 }
1317
1318 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1319 {
1320 return (op_encode_hdr_size + op_encode_stateid_maxsz
1321 + op_encode_change_info_maxsz + 1
1322 + nfs4_fattr_bitmap_maxsz
1323 + op_encode_delegation_maxsz) * sizeof(__be32);
1324 }
1325
1326 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1327 {
1328 u32 maxcount = 0, rlen = 0;
1329
1330 maxcount = svc_max_payload(rqstp);
1331 rlen = op->u.read.rd_length;
1332
1333 if (rlen > maxcount)
1334 rlen = maxcount;
1335
1336 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1337 }
1338
1339 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1340 {
1341 u32 rlen = op->u.readdir.rd_maxcount;
1342
1343 if (rlen > PAGE_SIZE)
1344 rlen = PAGE_SIZE;
1345
1346 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1347 * sizeof(__be32) + rlen;
1348 }
1349
1350 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1351 {
1352 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1353 * sizeof(__be32);
1354 }
1355
1356 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1357 {
1358 return (op_encode_hdr_size + op_encode_change_info_maxsz
1359 + op_encode_change_info_maxsz) * sizeof(__be32);
1360 }
1361
1362 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1363 {
1364 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1365 }
1366
1367 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1368 {
1369 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1370 }
1371
1372 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1373 {
1374 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1375 }
1376
1377 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1378 {
1379 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1380 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1381 2 + /*eir_server_owner.so_minor_id */\
1382 /* eir_server_owner.so_major_id<> */\
1383 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1384 /* eir_server_scope<> */\
1385 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1386 1 + /* eir_server_impl_id array length */\
1387 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1388 }
1389
1390 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1391 {
1392 return (op_encode_hdr_size + \
1393 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1394 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1395 }
1396
1397 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1398 {
1399 return (op_encode_hdr_size + \
1400 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1401 2 + /* csr_sequence, csr_flags */\
1402 op_encode_channel_attrs_maxsz + \
1403 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1404 }
1405
1406 static struct nfsd4_operation nfsd4_ops[] = {
1407 [OP_ACCESS] = {
1408 .op_func = (nfsd4op_func)nfsd4_access,
1409 .op_name = "OP_ACCESS",
1410 },
1411 [OP_CLOSE] = {
1412 .op_func = (nfsd4op_func)nfsd4_close,
1413 .op_flags = OP_MODIFIES_SOMETHING,
1414 .op_name = "OP_CLOSE",
1415 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1416 },
1417 [OP_COMMIT] = {
1418 .op_func = (nfsd4op_func)nfsd4_commit,
1419 .op_flags = OP_MODIFIES_SOMETHING,
1420 .op_name = "OP_COMMIT",
1421 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1422 },
1423 [OP_CREATE] = {
1424 .op_func = (nfsd4op_func)nfsd4_create,
1425 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1426 .op_name = "OP_CREATE",
1427 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1428 },
1429 [OP_DELEGRETURN] = {
1430 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1431 .op_flags = OP_MODIFIES_SOMETHING,
1432 .op_name = "OP_DELEGRETURN",
1433 .op_rsize_bop = nfsd4_only_status_rsize,
1434 },
1435 [OP_GETATTR] = {
1436 .op_func = (nfsd4op_func)nfsd4_getattr,
1437 .op_flags = ALLOWED_ON_ABSENT_FS,
1438 .op_name = "OP_GETATTR",
1439 },
1440 [OP_GETFH] = {
1441 .op_func = (nfsd4op_func)nfsd4_getfh,
1442 .op_name = "OP_GETFH",
1443 },
1444 [OP_LINK] = {
1445 .op_func = (nfsd4op_func)nfsd4_link,
1446 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1447 | OP_CACHEME,
1448 .op_name = "OP_LINK",
1449 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1450 },
1451 [OP_LOCK] = {
1452 .op_func = (nfsd4op_func)nfsd4_lock,
1453 .op_flags = OP_MODIFIES_SOMETHING,
1454 .op_name = "OP_LOCK",
1455 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1456 },
1457 [OP_LOCKT] = {
1458 .op_func = (nfsd4op_func)nfsd4_lockt,
1459 .op_name = "OP_LOCKT",
1460 },
1461 [OP_LOCKU] = {
1462 .op_func = (nfsd4op_func)nfsd4_locku,
1463 .op_flags = OP_MODIFIES_SOMETHING,
1464 .op_name = "OP_LOCKU",
1465 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1466 },
1467 [OP_LOOKUP] = {
1468 .op_func = (nfsd4op_func)nfsd4_lookup,
1469 .op_flags = OP_HANDLES_WRONGSEC,
1470 .op_name = "OP_LOOKUP",
1471 },
1472 [OP_LOOKUPP] = {
1473 .op_func = (nfsd4op_func)nfsd4_lookupp,
1474 .op_flags = OP_HANDLES_WRONGSEC,
1475 .op_name = "OP_LOOKUPP",
1476 },
1477 [OP_NVERIFY] = {
1478 .op_func = (nfsd4op_func)nfsd4_nverify,
1479 .op_name = "OP_NVERIFY",
1480 },
1481 [OP_OPEN] = {
1482 .op_func = (nfsd4op_func)nfsd4_open,
1483 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1484 .op_name = "OP_OPEN",
1485 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1486 },
1487 [OP_OPEN_CONFIRM] = {
1488 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1489 .op_flags = OP_MODIFIES_SOMETHING,
1490 .op_name = "OP_OPEN_CONFIRM",
1491 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1492 },
1493 [OP_OPEN_DOWNGRADE] = {
1494 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1495 .op_flags = OP_MODIFIES_SOMETHING,
1496 .op_name = "OP_OPEN_DOWNGRADE",
1497 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1498 },
1499 [OP_PUTFH] = {
1500 .op_func = (nfsd4op_func)nfsd4_putfh,
1501 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1502 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1503 .op_name = "OP_PUTFH",
1504 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1505 },
1506 [OP_PUTPUBFH] = {
1507 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1508 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1509 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1510 .op_name = "OP_PUTPUBFH",
1511 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1512 },
1513 [OP_PUTROOTFH] = {
1514 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1515 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1516 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1517 .op_name = "OP_PUTROOTFH",
1518 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1519 },
1520 [OP_READ] = {
1521 .op_func = (nfsd4op_func)nfsd4_read,
1522 .op_flags = OP_MODIFIES_SOMETHING,
1523 .op_name = "OP_READ",
1524 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1525 },
1526 [OP_READDIR] = {
1527 .op_func = (nfsd4op_func)nfsd4_readdir,
1528 .op_flags = OP_MODIFIES_SOMETHING,
1529 .op_name = "OP_READDIR",
1530 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1531 },
1532 [OP_READLINK] = {
1533 .op_func = (nfsd4op_func)nfsd4_readlink,
1534 .op_name = "OP_READLINK",
1535 },
1536 [OP_REMOVE] = {
1537 .op_func = (nfsd4op_func)nfsd4_remove,
1538 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1539 .op_name = "OP_REMOVE",
1540 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1541 },
1542 [OP_RENAME] = {
1543 .op_func = (nfsd4op_func)nfsd4_rename,
1544 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1545 .op_name = "OP_RENAME",
1546 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1547 },
1548 [OP_RENEW] = {
1549 .op_func = (nfsd4op_func)nfsd4_renew,
1550 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1551 | OP_MODIFIES_SOMETHING,
1552 .op_name = "OP_RENEW",
1553 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1554
1555 },
1556 [OP_RESTOREFH] = {
1557 .op_func = (nfsd4op_func)nfsd4_restorefh,
1558 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1559 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1560 .op_name = "OP_RESTOREFH",
1561 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1562 },
1563 [OP_SAVEFH] = {
1564 .op_func = (nfsd4op_func)nfsd4_savefh,
1565 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1566 .op_name = "OP_SAVEFH",
1567 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1568 },
1569 [OP_SECINFO] = {
1570 .op_func = (nfsd4op_func)nfsd4_secinfo,
1571 .op_flags = OP_HANDLES_WRONGSEC,
1572 .op_name = "OP_SECINFO",
1573 },
1574 [OP_SETATTR] = {
1575 .op_func = (nfsd4op_func)nfsd4_setattr,
1576 .op_name = "OP_SETATTR",
1577 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1578 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1579 },
1580 [OP_SETCLIENTID] = {
1581 .op_func = (nfsd4op_func)nfsd4_setclientid,
1582 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1583 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1584 .op_name = "OP_SETCLIENTID",
1585 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1586 },
1587 [OP_SETCLIENTID_CONFIRM] = {
1588 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1589 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1590 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1591 .op_name = "OP_SETCLIENTID_CONFIRM",
1592 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1593 },
1594 [OP_VERIFY] = {
1595 .op_func = (nfsd4op_func)nfsd4_verify,
1596 .op_name = "OP_VERIFY",
1597 },
1598 [OP_WRITE] = {
1599 .op_func = (nfsd4op_func)nfsd4_write,
1600 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1601 .op_name = "OP_WRITE",
1602 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1603 },
1604 [OP_RELEASE_LOCKOWNER] = {
1605 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1606 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1607 | OP_MODIFIES_SOMETHING,
1608 .op_name = "OP_RELEASE_LOCKOWNER",
1609 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1610 },
1611
1612 /* NFSv4.1 operations */
1613 [OP_EXCHANGE_ID] = {
1614 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1615 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1616 | OP_MODIFIES_SOMETHING,
1617 .op_name = "OP_EXCHANGE_ID",
1618 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1619 },
1620 [OP_BIND_CONN_TO_SESSION] = {
1621 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1622 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1623 | OP_MODIFIES_SOMETHING,
1624 .op_name = "OP_BIND_CONN_TO_SESSION",
1625 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1626 },
1627 [OP_CREATE_SESSION] = {
1628 .op_func = (nfsd4op_func)nfsd4_create_session,
1629 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1630 | OP_MODIFIES_SOMETHING,
1631 .op_name = "OP_CREATE_SESSION",
1632 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1633 },
1634 [OP_DESTROY_SESSION] = {
1635 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1636 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1637 | OP_MODIFIES_SOMETHING,
1638 .op_name = "OP_DESTROY_SESSION",
1639 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1640 },
1641 [OP_SEQUENCE] = {
1642 .op_func = (nfsd4op_func)nfsd4_sequence,
1643 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1644 .op_name = "OP_SEQUENCE",
1645 },
1646 [OP_DESTROY_CLIENTID] = {
1647 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1648 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1649 | OP_MODIFIES_SOMETHING,
1650 .op_name = "OP_DESTROY_CLIENTID",
1651 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1652 },
1653 [OP_RECLAIM_COMPLETE] = {
1654 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1655 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1656 .op_name = "OP_RECLAIM_COMPLETE",
1657 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1658 },
1659 [OP_SECINFO_NO_NAME] = {
1660 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1661 .op_flags = OP_HANDLES_WRONGSEC,
1662 .op_name = "OP_SECINFO_NO_NAME",
1663 },
1664 [OP_TEST_STATEID] = {
1665 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1666 .op_flags = ALLOWED_WITHOUT_FH,
1667 .op_name = "OP_TEST_STATEID",
1668 },
1669 [OP_FREE_STATEID] = {
1670 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1671 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1672 .op_name = "OP_FREE_STATEID",
1673 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1674 },
1675 };
1676
1677 static const char *nfsd4_op_name(unsigned opnum)
1678 {
1679 if (opnum < ARRAY_SIZE(nfsd4_ops))
1680 return nfsd4_ops[opnum].op_name;
1681 return "unknown_operation";
1682 }
1683
1684 #define nfsd4_voidres nfsd4_voidargs
1685 struct nfsd4_voidargs { int dummy; };
1686
1687 static struct svc_procedure nfsd_procedures4[2] = {
1688 [NFSPROC4_NULL] = {
1689 .pc_func = (svc_procfunc) nfsd4_proc_null,
1690 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1691 .pc_argsize = sizeof(struct nfsd4_voidargs),
1692 .pc_ressize = sizeof(struct nfsd4_voidres),
1693 .pc_cachetype = RC_NOCACHE,
1694 .pc_xdrressize = 1,
1695 },
1696 [NFSPROC4_COMPOUND] = {
1697 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1698 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1699 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1700 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1701 .pc_ressize = sizeof(struct nfsd4_compoundres),
1702 .pc_release = nfsd4_release_compoundargs,
1703 .pc_cachetype = RC_NOCACHE,
1704 .pc_xdrressize = NFSD_BUFSIZE/4,
1705 },
1706 };
1707
1708 struct svc_version nfsd_version4 = {
1709 .vs_vers = 4,
1710 .vs_nproc = 2,
1711 .vs_proc = nfsd_procedures4,
1712 .vs_dispatch = nfsd_dispatch,
1713 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1714 };
1715
1716 /*
1717 * Local variables:
1718 * c-basic-offset: 8
1719 * End:
1720 */
Linux 2.6 libata-dev (mirror)