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TTY: move tty buffers to tty_port
[linux-2.6/btrfs-unstable.git] / fs / nfsd / nfs4proc.c
blob6c9a4b291dba2c7e44498a32dc46ab6973e922c9
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 #include "current_stateid.h"
43
44 #define NFSDDBG_FACILITY NFSDDBG_PROC
45
46 static u32 nfsd_attrmask[] = {
47 NFSD_WRITEABLE_ATTRS_WORD0,
48 NFSD_WRITEABLE_ATTRS_WORD1,
49 NFSD_WRITEABLE_ATTRS_WORD2
50 };
51
52 static u32 nfsd41_ex_attrmask[] = {
53 NFSD_SUPPATTR_EXCLCREAT_WORD0,
54 NFSD_SUPPATTR_EXCLCREAT_WORD1,
55 NFSD_SUPPATTR_EXCLCREAT_WORD2
56 };
57
58 static __be32
59 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
60 u32 *bmval, u32 *writable)
61 {
62 struct dentry *dentry = cstate->current_fh.fh_dentry;
63
64 /*
65 * Check about attributes are supported by the NFSv4 server or not.
66 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
67 */
68 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
69 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
70 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
71 return nfserr_attrnotsupp;
72
73 /*
74 * Check FATTR4_WORD0_ACL can be supported
75 * in current environment or not.
76 */
77 if (bmval[0] & FATTR4_WORD0_ACL) {
78 if (!IS_POSIXACL(dentry->d_inode))
79 return nfserr_attrnotsupp;
80 }
81
82 /*
83 * According to spec, read-only attributes return ERR_INVAL.
84 */
85 if (writable) {
86 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
87 (bmval[2] & ~writable[2]))
88 return nfserr_inval;
89 }
90
91 return nfs_ok;
92 }
93
94 static __be32
95 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
96 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
97 {
98 __be32 status = nfs_ok;
99
100 if (open->op_create == NFS4_OPEN_CREATE) {
101 if (open->op_createmode == NFS4_CREATE_UNCHECKED
102 || open->op_createmode == NFS4_CREATE_GUARDED)
103 status = check_attr_support(rqstp, cstate,
104 open->op_bmval, nfsd_attrmask);
105 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
106 status = check_attr_support(rqstp, cstate,
107 open->op_bmval, nfsd41_ex_attrmask);
108 }
109
110 return status;
111 }
112
113 static int
114 is_create_with_attrs(struct nfsd4_open *open)
115 {
116 return open->op_create == NFS4_OPEN_CREATE
117 && (open->op_createmode == NFS4_CREATE_UNCHECKED
118 || open->op_createmode == NFS4_CREATE_GUARDED
119 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
120 }
121
122 /*
123 * if error occurs when setting the acl, just clear the acl bit
124 * in the returned attr bitmap.
125 */
126 static void
127 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
128 struct nfs4_acl *acl, u32 *bmval)
129 {
130 __be32 status;
131
132 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
133 if (status)
134 /*
135 * We should probably fail the whole open at this point,
136 * but we've already created the file, so it's too late;
137 * So this seems the least of evils:
138 */
139 bmval[0] &= ~FATTR4_WORD0_ACL;
140 }
141
142 static inline void
143 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
144 {
145 fh_put(dst);
146 dget(src->fh_dentry);
147 if (src->fh_export)
148 cache_get(&src->fh_export->h);
149 *dst = *src;
150 }
151
152 static __be32
153 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
154 {
155 __be32 status;
156
157 if (open->op_truncate &&
158 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
159 return nfserr_inval;
160
161 accmode |= NFSD_MAY_READ_IF_EXEC;
162
163 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
164 accmode |= NFSD_MAY_READ;
165 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
166 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
167 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
168 accmode |= NFSD_MAY_WRITE;
169
170 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
171
172 return status;
173 }
174
175 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
176 {
177 umode_t mode = fh->fh_dentry->d_inode->i_mode;
178
179 if (S_ISREG(mode))
180 return nfs_ok;
181 if (S_ISDIR(mode))
182 return nfserr_isdir;
183 /*
184 * Using err_symlink as our catch-all case may look odd; but
185 * there's no other obvious error for this case in 4.0, and we
186 * happen to know that it will cause the linux v4 client to do
187 * the right thing on attempts to open something other than a
188 * regular file.
189 */
190 return nfserr_symlink;
191 }
192
193 static __be32
194 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
195 {
196 struct svc_fh *resfh;
197 __be32 status;
198
199 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
200 if (!resfh)
201 return nfserr_jukebox;
202 fh_init(resfh, NFS4_FHSIZE);
203 open->op_truncate = 0;
204
205 if (open->op_create) {
206 /* FIXME: check session persistence and pnfs flags.
207 * The nfsv4.1 spec requires the following semantics:
208 *
209 * Persistent | pNFS | Server REQUIRED | Client Allowed
210 * Reply Cache | server | |
211 * -------------+--------+-----------------+--------------------
212 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
213 * | | | (SHOULD)
214 * | | and EXCLUSIVE4 | or EXCLUSIVE4
215 * | | | (SHOULD NOT)
216 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
217 * yes | no | GUARDED4 | GUARDED4
218 * yes | yes | GUARDED4 | GUARDED4
219 */
220
221 /*
222 * Note: create modes (UNCHECKED,GUARDED...) are the same
223 * in NFSv4 as in v3 except EXCLUSIVE4_1.
224 */
225 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
226 open->op_fname.len, &open->op_iattr,
227 resfh, open->op_createmode,
228 (u32 *)open->op_verf.data,
229 &open->op_truncate, &open->op_created);
230
231 /*
232 * Following rfc 3530 14.2.16, use the returned bitmask
233 * to indicate which attributes we used to store the
234 * verifier:
235 */
236 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
237 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
238 FATTR4_WORD1_TIME_MODIFY);
239 } else {
240 status = nfsd_lookup(rqstp, current_fh,
241 open->op_fname.data, open->op_fname.len, resfh);
242 fh_unlock(current_fh);
243 }
244 if (status)
245 goto out;
246 status = nfsd_check_obj_isreg(resfh);
247 if (status)
248 goto out;
249
250 if (is_create_with_attrs(open) && open->op_acl != NULL)
251 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
252
253 /* set reply cache */
254 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
255 &resfh->fh_handle);
256 if (!open->op_created)
257 status = do_open_permission(rqstp, resfh, open,
258 NFSD_MAY_NOP);
259 set_change_info(&open->op_cinfo, current_fh);
260 fh_dup2(current_fh, resfh);
261 out:
262 fh_put(resfh);
263 kfree(resfh);
264 return status;
265 }
266
267 static __be32
268 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
269 {
270 __be32 status;
271
272 /* We don't know the target directory, and therefore can not
273 * set the change info
274 */
275
276 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
277
278 /* set replay cache */
279 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
280 &current_fh->fh_handle);
281
282 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
283 (open->op_iattr.ia_size == 0);
284
285 status = do_open_permission(rqstp, current_fh, open,
286 NFSD_MAY_OWNER_OVERRIDE);
287
288 return status;
289 }
290
291 static void
292 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
293 {
294 struct nfsd4_sessionid *sid =
295 (struct nfsd4_sessionid *)session->se_sessionid.data;
296
297 clid->cl_boot = sid->clientid.cl_boot;
298 clid->cl_id = sid->clientid.cl_id;
299 }
300
301 static __be32
302 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
303 struct nfsd4_open *open)
304 {
305 __be32 status;
306 struct nfsd4_compoundres *resp;
307
308 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
309 (int)open->op_fname.len, open->op_fname.data,
310 open->op_openowner);
311
312 /* This check required by spec. */
313 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
314 return nfserr_inval;
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 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
323 &cstate->session->se_client->cl_flags) &&
324 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
325 return nfserr_grace;
326
327 if (nfsd4_has_session(cstate))
328 copy_clientid(&open->op_clientid, cstate->session);
329
330 nfs4_lock_state();
331
332 /* check seqid for replay. set nfs4_owner */
333 resp = rqstp->rq_resp;
334 status = nfsd4_process_open1(&resp->cstate, open);
335 if (status == nfserr_replay_me) {
336 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
337 fh_put(&cstate->current_fh);
338 fh_copy_shallow(&cstate->current_fh.fh_handle,
339 &rp->rp_openfh);
340 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
341 if (status)
342 dprintk("nfsd4_open: replay failed"
343 " restoring previous filehandle\n");
344 else
345 status = nfserr_replay_me;
346 }
347 if (status)
348 goto out;
349
350 status = nfsd4_check_open_attributes(rqstp, cstate, open);
351 if (status)
352 goto out;
353
354 /* Openowner is now set, so sequence id will get bumped. Now we need
355 * these checks before we do any creates: */
356 status = nfserr_grace;
357 if (locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
358 goto out;
359 status = nfserr_no_grace;
360 if (!locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
361 goto out;
362
363 switch (open->op_claim_type) {
364 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
365 case NFS4_OPEN_CLAIM_NULL:
366 status = do_open_lookup(rqstp, &cstate->current_fh,
367 open);
368 if (status)
369 goto out;
370 break;
371 case NFS4_OPEN_CLAIM_PREVIOUS:
372 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
373 status = nfs4_check_open_reclaim(&open->op_clientid, cstate->minorversion);
374 if (status)
375 goto out;
376 case NFS4_OPEN_CLAIM_FH:
377 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
378 status = do_open_fhandle(rqstp, &cstate->current_fh,
379 open);
380 if (status)
381 goto out;
382 break;
383 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
384 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
385 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
386 dprintk("NFSD: unsupported OPEN claim type %d\n",
387 open->op_claim_type);
388 status = nfserr_notsupp;
389 goto out;
390 default:
391 dprintk("NFSD: Invalid OPEN claim type %d\n",
392 open->op_claim_type);
393 status = nfserr_inval;
394 goto out;
395 }
396 /*
397 * nfsd4_process_open2() does the actual opening of the file. If
398 * successful, it (1) truncates the file if open->op_truncate was
399 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
400 */
401 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
402 WARN_ON(status && open->op_created);
403 out:
404 nfsd4_cleanup_open_state(open, status);
405 if (open->op_openowner)
406 cstate->replay_owner = &open->op_openowner->oo_owner;
407 else
408 nfs4_unlock_state();
409 return status;
410 }
411
412 /*
413 * filehandle-manipulating ops.
414 */
415 static __be32
416 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
417 struct svc_fh **getfh)
418 {
419 if (!cstate->current_fh.fh_dentry)
420 return nfserr_nofilehandle;
421
422 *getfh = &cstate->current_fh;
423 return nfs_ok;
424 }
425
426 static __be32
427 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
428 struct nfsd4_putfh *putfh)
429 {
430 fh_put(&cstate->current_fh);
431 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
432 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
433 putfh->pf_fhlen);
434 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
435 }
436
437 static __be32
438 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
439 void *arg)
440 {
441 __be32 status;
442
443 fh_put(&cstate->current_fh);
444 status = exp_pseudoroot(rqstp, &cstate->current_fh);
445 return status;
446 }
447
448 static __be32
449 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
450 void *arg)
451 {
452 if (!cstate->save_fh.fh_dentry)
453 return nfserr_restorefh;
454
455 fh_dup2(&cstate->current_fh, &cstate->save_fh);
456 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
457 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
458 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
459 }
460 return nfs_ok;
461 }
462
463 static __be32
464 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
465 void *arg)
466 {
467 if (!cstate->current_fh.fh_dentry)
468 return nfserr_nofilehandle;
469
470 fh_dup2(&cstate->save_fh, &cstate->current_fh);
471 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
472 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
473 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
474 }
475 return nfs_ok;
476 }
477
478 /*
479 * misc nfsv4 ops
480 */
481 static __be32
482 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
483 struct nfsd4_access *access)
484 {
485 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
486 return nfserr_inval;
487
488 access->ac_resp_access = access->ac_req_access;
489 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
490 &access->ac_supported);
491 }
492
493 static void gen_boot_verifier(nfs4_verifier *verifier)
494 {
495 __be32 verf[2];
496
497 verf[0] = (__be32)nfssvc_boot.tv_sec;
498 verf[1] = (__be32)nfssvc_boot.tv_usec;
499 memcpy(verifier->data, verf, sizeof(verifier->data));
500 }
501
502 static __be32
503 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504 struct nfsd4_commit *commit)
505 {
506 gen_boot_verifier(&commit->co_verf);
507 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
508 commit->co_count);
509 }
510
511 static __be32
512 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
513 struct nfsd4_create *create)
514 {
515 struct svc_fh resfh;
516 __be32 status;
517 dev_t rdev;
518
519 fh_init(&resfh, NFS4_FHSIZE);
520
521 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
522 NFSD_MAY_CREATE);
523 if (status)
524 return status;
525
526 status = check_attr_support(rqstp, cstate, create->cr_bmval,
527 nfsd_attrmask);
528 if (status)
529 return status;
530
531 switch (create->cr_type) {
532 case NF4LNK:
533 /* ugh! we have to null-terminate the linktext, or
534 * vfs_symlink() will choke. it is always safe to
535 * null-terminate by brute force, since at worst we
536 * will overwrite the first byte of the create namelen
537 * in the XDR buffer, which has already been extracted
538 * during XDR decode.
539 */
540 create->cr_linkname[create->cr_linklen] = 0;
541
542 status = nfsd_symlink(rqstp, &cstate->current_fh,
543 create->cr_name, create->cr_namelen,
544 create->cr_linkname, create->cr_linklen,
545 &resfh, &create->cr_iattr);
546 break;
547
548 case NF4BLK:
549 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
550 if (MAJOR(rdev) != create->cr_specdata1 ||
551 MINOR(rdev) != create->cr_specdata2)
552 return nfserr_inval;
553 status = nfsd_create(rqstp, &cstate->current_fh,
554 create->cr_name, create->cr_namelen,
555 &create->cr_iattr, S_IFBLK, rdev, &resfh);
556 break;
557
558 case NF4CHR:
559 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
560 if (MAJOR(rdev) != create->cr_specdata1 ||
561 MINOR(rdev) != create->cr_specdata2)
562 return nfserr_inval;
563 status = nfsd_create(rqstp, &cstate->current_fh,
564 create->cr_name, create->cr_namelen,
565 &create->cr_iattr,S_IFCHR, rdev, &resfh);
566 break;
567
568 case NF4SOCK:
569 status = nfsd_create(rqstp, &cstate->current_fh,
570 create->cr_name, create->cr_namelen,
571 &create->cr_iattr, S_IFSOCK, 0, &resfh);
572 break;
573
574 case NF4FIFO:
575 status = nfsd_create(rqstp, &cstate->current_fh,
576 create->cr_name, create->cr_namelen,
577 &create->cr_iattr, S_IFIFO, 0, &resfh);
578 break;
579
580 case NF4DIR:
581 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
582 status = nfsd_create(rqstp, &cstate->current_fh,
583 create->cr_name, create->cr_namelen,
584 &create->cr_iattr, S_IFDIR, 0, &resfh);
585 break;
586
587 default:
588 status = nfserr_badtype;
589 }
590
591 if (status)
592 goto out;
593
594 if (create->cr_acl != NULL)
595 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
596 create->cr_bmval);
597
598 fh_unlock(&cstate->current_fh);
599 set_change_info(&create->cr_cinfo, &cstate->current_fh);
600 fh_dup2(&cstate->current_fh, &resfh);
601 out:
602 fh_put(&resfh);
603 return status;
604 }
605
606 static __be32
607 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
608 struct nfsd4_getattr *getattr)
609 {
610 __be32 status;
611
612 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
613 if (status)
614 return status;
615
616 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
617 return nfserr_inval;
618
619 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
620 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
621 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
622
623 getattr->ga_fhp = &cstate->current_fh;
624 return nfs_ok;
625 }
626
627 static __be32
628 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
629 struct nfsd4_link *link)
630 {
631 __be32 status = nfserr_nofilehandle;
632
633 if (!cstate->save_fh.fh_dentry)
634 return status;
635 status = nfsd_link(rqstp, &cstate->current_fh,
636 link->li_name, link->li_namelen, &cstate->save_fh);
637 if (!status)
638 set_change_info(&link->li_cinfo, &cstate->current_fh);
639 return status;
640 }
641
642 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
643 {
644 struct svc_fh tmp_fh;
645 __be32 ret;
646
647 fh_init(&tmp_fh, NFS4_FHSIZE);
648 ret = exp_pseudoroot(rqstp, &tmp_fh);
649 if (ret)
650 return ret;
651 if (tmp_fh.fh_dentry == fh->fh_dentry) {
652 fh_put(&tmp_fh);
653 return nfserr_noent;
654 }
655 fh_put(&tmp_fh);
656 return nfsd_lookup(rqstp, fh, "..", 2, fh);
657 }
658
659 static __be32
660 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
661 void *arg)
662 {
663 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
664 }
665
666 static __be32
667 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
668 struct nfsd4_lookup *lookup)
669 {
670 return nfsd_lookup(rqstp, &cstate->current_fh,
671 lookup->lo_name, lookup->lo_len,
672 &cstate->current_fh);
673 }
674
675 static __be32
676 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
677 struct nfsd4_read *read)
678 {
679 __be32 status;
680
681 /* no need to check permission - this will be done in nfsd_read() */
682
683 read->rd_filp = NULL;
684 if (read->rd_offset >= OFFSET_MAX)
685 return nfserr_inval;
686
687 nfs4_lock_state();
688 /* check stateid */
689 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
690 cstate, &read->rd_stateid,
691 RD_STATE, &read->rd_filp))) {
692 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
693 goto out;
694 }
695 if (read->rd_filp)
696 get_file(read->rd_filp);
697 status = nfs_ok;
698 out:
699 nfs4_unlock_state();
700 read->rd_rqstp = rqstp;
701 read->rd_fhp = &cstate->current_fh;
702 return status;
703 }
704
705 static __be32
706 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
707 struct nfsd4_readdir *readdir)
708 {
709 u64 cookie = readdir->rd_cookie;
710 static const nfs4_verifier zeroverf;
711
712 /* no need to check permission - this will be done in nfsd_readdir() */
713
714 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
715 return nfserr_inval;
716
717 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
718 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
719 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
720
721 if ((cookie == 1) || (cookie == 2) ||
722 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
723 return nfserr_bad_cookie;
724
725 readdir->rd_rqstp = rqstp;
726 readdir->rd_fhp = &cstate->current_fh;
727 return nfs_ok;
728 }
729
730 static __be32
731 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
732 struct nfsd4_readlink *readlink)
733 {
734 readlink->rl_rqstp = rqstp;
735 readlink->rl_fhp = &cstate->current_fh;
736 return nfs_ok;
737 }
738
739 static __be32
740 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
741 struct nfsd4_remove *remove)
742 {
743 __be32 status;
744
745 if (locks_in_grace(SVC_NET(rqstp)))
746 return nfserr_grace;
747 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
748 remove->rm_name, remove->rm_namelen);
749 if (!status) {
750 fh_unlock(&cstate->current_fh);
751 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
752 }
753 return status;
754 }
755
756 static __be32
757 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
758 struct nfsd4_rename *rename)
759 {
760 __be32 status = nfserr_nofilehandle;
761
762 if (!cstate->save_fh.fh_dentry)
763 return status;
764 if (locks_in_grace(SVC_NET(rqstp)) &&
765 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
766 return nfserr_grace;
767 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
768 rename->rn_snamelen, &cstate->current_fh,
769 rename->rn_tname, rename->rn_tnamelen);
770
771 /* the underlying filesystem returns different error's than required
772 * by NFSv4. both save_fh and current_fh have been verified.. */
773 if (status == nfserr_isdir)
774 status = nfserr_exist;
775 else if ((status == nfserr_notdir) &&
776 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
777 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
778 status = nfserr_exist;
779
780 if (!status) {
781 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
782 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
783 }
784 return status;
785 }
786
787 static __be32
788 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
789 struct nfsd4_secinfo *secinfo)
790 {
791 struct svc_fh resfh;
792 struct svc_export *exp;
793 struct dentry *dentry;
794 __be32 err;
795
796 fh_init(&resfh, NFS4_FHSIZE);
797 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
798 if (err)
799 return err;
800 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
801 secinfo->si_name, secinfo->si_namelen,
802 &exp, &dentry);
803 if (err)
804 return err;
805 if (dentry->d_inode == NULL) {
806 exp_put(exp);
807 err = nfserr_noent;
808 } else
809 secinfo->si_exp = exp;
810 dput(dentry);
811 if (cstate->minorversion)
812 /* See rfc 5661 section 2.6.3.1.1.8 */
813 fh_put(&cstate->current_fh);
814 return err;
815 }
816
817 static __be32
818 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
819 struct nfsd4_secinfo_no_name *sin)
820 {
821 __be32 err;
822
823 switch (sin->sin_style) {
824 case NFS4_SECINFO_STYLE4_CURRENT_FH:
825 break;
826 case NFS4_SECINFO_STYLE4_PARENT:
827 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
828 if (err)
829 return err;
830 break;
831 default:
832 return nfserr_inval;
833 }
834 exp_get(cstate->current_fh.fh_export);
835 sin->sin_exp = cstate->current_fh.fh_export;
836 fh_put(&cstate->current_fh);
837 return nfs_ok;
838 }
839
840 static __be32
841 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
842 struct nfsd4_setattr *setattr)
843 {
844 __be32 status = nfs_ok;
845 int err;
846
847 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
848 nfs4_lock_state();
849 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
850 &setattr->sa_stateid, WR_STATE, NULL);
851 nfs4_unlock_state();
852 if (status) {
853 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
854 return status;
855 }
856 }
857 err = fh_want_write(&cstate->current_fh);
858 if (err)
859 return nfserrno(err);
860 status = nfs_ok;
861
862 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
863 nfsd_attrmask);
864 if (status)
865 goto out;
866
867 if (setattr->sa_acl != NULL)
868 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
869 setattr->sa_acl);
870 if (status)
871 goto out;
872 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
873 0, (time_t)0);
874 out:
875 fh_drop_write(&cstate->current_fh);
876 return status;
877 }
878
879 static __be32
880 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
881 struct nfsd4_write *write)
882 {
883 stateid_t *stateid = &write->wr_stateid;
884 struct file *filp = NULL;
885 __be32 status = nfs_ok;
886 unsigned long cnt;
887
888 /* no need to check permission - this will be done in nfsd_write() */
889
890 if (write->wr_offset >= OFFSET_MAX)
891 return nfserr_inval;
892
893 nfs4_lock_state();
894 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
895 cstate, stateid, WR_STATE, &filp);
896 if (filp)
897 get_file(filp);
898 nfs4_unlock_state();
899
900 if (status) {
901 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
902 return status;
903 }
904
905 cnt = write->wr_buflen;
906 write->wr_how_written = write->wr_stable_how;
907 gen_boot_verifier(&write->wr_verifier);
908
909 status = nfsd_write(rqstp, &cstate->current_fh, filp,
910 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
911 &cnt, &write->wr_how_written);
912 if (filp)
913 fput(filp);
914
915 write->wr_bytes_written = cnt;
916
917 return status;
918 }
919
920 /* This routine never returns NFS_OK! If there are no other errors, it
921 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
922 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
923 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
924 */
925 static __be32
926 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
927 struct nfsd4_verify *verify)
928 {
929 __be32 *buf, *p;
930 int count;
931 __be32 status;
932
933 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
934 if (status)
935 return status;
936
937 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
938 if (status)
939 return status;
940
941 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
942 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
943 return nfserr_inval;
944 if (verify->ve_attrlen & 3)
945 return nfserr_inval;
946
947 /* count in words:
948 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
949 */
950 count = 4 + (verify->ve_attrlen >> 2);
951 buf = kmalloc(count << 2, GFP_KERNEL);
952 if (!buf)
953 return nfserr_jukebox;
954
955 status = nfsd4_encode_fattr(&cstate->current_fh,
956 cstate->current_fh.fh_export,
957 cstate->current_fh.fh_dentry, buf,
958 &count, verify->ve_bmval,
959 rqstp, 0);
960
961 /* this means that nfsd4_encode_fattr() ran out of space */
962 if (status == nfserr_resource && count == 0)
963 status = nfserr_not_same;
964 if (status)
965 goto out_kfree;
966
967 /* skip bitmap */
968 p = buf + 1 + ntohl(buf[0]);
969 status = nfserr_not_same;
970 if (ntohl(*p++) != verify->ve_attrlen)
971 goto out_kfree;
972 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
973 status = nfserr_same;
974
975 out_kfree:
976 kfree(buf);
977 return status;
978 }
979
980 static __be32
981 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
982 struct nfsd4_verify *verify)
983 {
984 __be32 status;
985
986 status = _nfsd4_verify(rqstp, cstate, verify);
987 return status == nfserr_not_same ? nfs_ok : status;
988 }
989
990 static __be32
991 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
992 struct nfsd4_verify *verify)
993 {
994 __be32 status;
995
996 status = _nfsd4_verify(rqstp, cstate, verify);
997 return status == nfserr_same ? nfs_ok : status;
998 }
999
1000 /*
1001 * NULL call.
1002 */
1003 static __be32
1004 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1005 {
1006 return nfs_ok;
1007 }
1008
1009 static inline void nfsd4_increment_op_stats(u32 opnum)
1010 {
1011 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1012 nfsdstats.nfs4_opcount[opnum]++;
1013 }
1014
1015 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1016 void *);
1017 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1018 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1019 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1020
1021 enum nfsd4_op_flags {
1022 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1023 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1024 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1025 /* For rfc 5661 section 2.6.3.1.1: */
1026 OP_HANDLES_WRONGSEC = 1 << 3,
1027 OP_IS_PUTFH_LIKE = 1 << 4,
1028 /*
1029 * These are the ops whose result size we estimate before
1030 * encoding, to avoid performing an op then not being able to
1031 * respond or cache a response. This includes writes and setattrs
1032 * as well as the operations usually called "nonidempotent":
1033 */
1034 OP_MODIFIES_SOMETHING = 1 << 5,
1035 /*
1036 * Cache compounds containing these ops in the xid-based drc:
1037 * We use the DRC for compounds containing non-idempotent
1038 * operations, *except* those that are 4.1-specific (since
1039 * sessions provide their own EOS), and except for stateful
1040 * operations other than setclientid and setclientid_confirm
1041 * (since sequence numbers provide EOS for open, lock, etc in
1042 * the v4.0 case).
1043 */
1044 OP_CACHEME = 1 << 6,
1045 /*
1046 * These are ops which clear current state id.
1047 */
1048 OP_CLEAR_STATEID = 1 << 7,
1049 };
1050
1051 struct nfsd4_operation {
1052 nfsd4op_func op_func;
1053 u32 op_flags;
1054 char *op_name;
1055 /* Try to get response size before operation */
1056 nfsd4op_rsize op_rsize_bop;
1057 stateid_getter op_get_currentstateid;
1058 stateid_setter op_set_currentstateid;
1059 };
1060
1061 static struct nfsd4_operation nfsd4_ops[];
1062
1063 #ifdef NFSD_DEBUG
1064 static const char *nfsd4_op_name(unsigned opnum);
1065 #endif
1066
1067 /*
1068 * Enforce NFSv4.1 COMPOUND ordering rules:
1069 *
1070 * Also note, enforced elsewhere:
1071 * - SEQUENCE other than as first op results in
1072 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1073 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1074 * (Enforced in nfsd4_bind_conn_to_session().)
1075 * - DESTROY_SESSION must be the final operation in a compound, if
1076 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1077 * (Enforced in nfsd4_destroy_session().)
1078 */
1079 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1080 {
1081 struct nfsd4_op *op = &args->ops[0];
1082
1083 /* These ordering requirements don't apply to NFSv4.0: */
1084 if (args->minorversion == 0)
1085 return nfs_ok;
1086 /* This is weird, but OK, not our problem: */
1087 if (args->opcnt == 0)
1088 return nfs_ok;
1089 if (op->status == nfserr_op_illegal)
1090 return nfs_ok;
1091 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1092 return nfserr_op_not_in_session;
1093 if (op->opnum == OP_SEQUENCE)
1094 return nfs_ok;
1095 if (args->opcnt != 1)
1096 return nfserr_not_only_op;
1097 return nfs_ok;
1098 }
1099
1100 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1101 {
1102 return &nfsd4_ops[op->opnum];
1103 }
1104
1105 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1106 {
1107 return OPDESC(op)->op_flags & OP_CACHEME;
1108 }
1109
1110 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1111 {
1112 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1113 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1114 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1115 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1116 struct nfsd4_operation *thisd;
1117 struct nfsd4_operation *nextd;
1118
1119 thisd = OPDESC(this);
1120 /*
1121 * Most ops check wronsec on our own; only the putfh-like ops
1122 * have special rules.
1123 */
1124 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1125 return false;
1126 /*
1127 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1128 * put-filehandle operation if we're not going to use the
1129 * result:
1130 */
1131 if (argp->opcnt == resp->opcnt)
1132 return false;
1133
1134 nextd = OPDESC(next);
1135 /*
1136 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1137 * errors themselves as necessary; others should check for them
1138 * now:
1139 */
1140 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1141 }
1142
1143 /*
1144 * COMPOUND call.
1145 */
1146 static __be32
1147 nfsd4_proc_compound(struct svc_rqst *rqstp,
1148 struct nfsd4_compoundargs *args,
1149 struct nfsd4_compoundres *resp)
1150 {
1151 struct nfsd4_op *op;
1152 struct nfsd4_operation *opdesc;
1153 struct nfsd4_compound_state *cstate = &resp->cstate;
1154 int slack_bytes;
1155 u32 plen = 0;
1156 __be32 status;
1157
1158 resp->xbuf = &rqstp->rq_res;
1159 resp->p = rqstp->rq_res.head[0].iov_base +
1160 rqstp->rq_res.head[0].iov_len;
1161 resp->tagp = resp->p;
1162 /* reserve space for: taglen, tag, and opcnt */
1163 resp->p += 2 + XDR_QUADLEN(args->taglen);
1164 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1165 resp->taglen = args->taglen;
1166 resp->tag = args->tag;
1167 resp->opcnt = 0;
1168 resp->rqstp = rqstp;
1169 resp->cstate.minorversion = args->minorversion;
1170 resp->cstate.replay_owner = NULL;
1171 resp->cstate.session = NULL;
1172 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1173 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1174 /*
1175 * Don't use the deferral mechanism for NFSv4; compounds make it
1176 * too hard to avoid non-idempotency problems.
1177 */
1178 rqstp->rq_usedeferral = 0;
1179
1180 /*
1181 * According to RFC3010, this takes precedence over all other errors.
1182 */
1183 status = nfserr_minor_vers_mismatch;
1184 if (args->minorversion > nfsd_supported_minorversion)
1185 goto out;
1186
1187 status = nfs41_check_op_ordering(args);
1188 if (status) {
1189 op = &args->ops[0];
1190 op->status = status;
1191 goto encode_op;
1192 }
1193
1194 while (!status && resp->opcnt < args->opcnt) {
1195 op = &args->ops[resp->opcnt++];
1196
1197 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1198 resp->opcnt, args->opcnt, op->opnum,
1199 nfsd4_op_name(op->opnum));
1200 /*
1201 * The XDR decode routines may have pre-set op->status;
1202 * for example, if there is a miscellaneous XDR error
1203 * it will be set to nfserr_bad_xdr.
1204 */
1205 if (op->status)
1206 goto encode_op;
1207
1208 /* We must be able to encode a successful response to
1209 * this operation, with enough room left over to encode a
1210 * failed response to the next operation. If we don't
1211 * have enough room, fail with ERR_RESOURCE.
1212 */
1213 slack_bytes = (char *)resp->end - (char *)resp->p;
1214 if (slack_bytes < COMPOUND_SLACK_SPACE
1215 + COMPOUND_ERR_SLACK_SPACE) {
1216 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1217 op->status = nfserr_resource;
1218 goto encode_op;
1219 }
1220
1221 opdesc = OPDESC(op);
1222
1223 if (!cstate->current_fh.fh_dentry) {
1224 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1225 op->status = nfserr_nofilehandle;
1226 goto encode_op;
1227 }
1228 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1229 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1230 op->status = nfserr_moved;
1231 goto encode_op;
1232 }
1233
1234 /* If op is non-idempotent */
1235 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1236 plen = opdesc->op_rsize_bop(rqstp, op);
1237 op->status = nfsd4_check_resp_size(resp, plen);
1238 }
1239
1240 if (op->status)
1241 goto encode_op;
1242
1243 if (opdesc->op_func) {
1244 if (opdesc->op_get_currentstateid)
1245 opdesc->op_get_currentstateid(cstate, &op->u);
1246 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1247 } else
1248 BUG_ON(op->status == nfs_ok);
1249
1250 if (!op->status) {
1251 if (opdesc->op_set_currentstateid)
1252 opdesc->op_set_currentstateid(cstate, &op->u);
1253
1254 if (opdesc->op_flags & OP_CLEAR_STATEID)
1255 clear_current_stateid(cstate);
1256
1257 if (need_wrongsec_check(rqstp))
1258 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1259 }
1260
1261 encode_op:
1262 /* Only from SEQUENCE */
1263 if (resp->cstate.status == nfserr_replay_cache) {
1264 dprintk("%s NFS4.1 replay from cache\n", __func__);
1265 status = op->status;
1266 goto out;
1267 }
1268 if (op->status == nfserr_replay_me) {
1269 op->replay = &cstate->replay_owner->so_replay;
1270 nfsd4_encode_replay(resp, op);
1271 status = op->status = op->replay->rp_status;
1272 } else {
1273 nfsd4_encode_operation(resp, op);
1274 status = op->status;
1275 }
1276
1277 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1278 args->ops, args->opcnt, resp->opcnt, op->opnum,
1279 be32_to_cpu(status));
1280
1281 if (cstate->replay_owner) {
1282 nfs4_unlock_state();
1283 cstate->replay_owner = NULL;
1284 }
1285 /* XXX Ugh, we need to get rid of this kind of special case: */
1286 if (op->opnum == OP_READ && op->u.read.rd_filp)
1287 fput(op->u.read.rd_filp);
1288
1289 nfsd4_increment_op_stats(op->opnum);
1290 }
1291
1292 resp->cstate.status = status;
1293 fh_put(&resp->cstate.current_fh);
1294 fh_put(&resp->cstate.save_fh);
1295 BUG_ON(resp->cstate.replay_owner);
1296 out:
1297 /* Reset deferral mechanism for RPC deferrals */
1298 rqstp->rq_usedeferral = 1;
1299 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1300 return status;
1301 }
1302
1303 #define op_encode_hdr_size (2)
1304 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1305 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1306 #define op_encode_change_info_maxsz (5)
1307 #define nfs4_fattr_bitmap_maxsz (4)
1308
1309 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1310 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1311
1312 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1313
1314 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1315 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1316 op_encode_ace_maxsz)
1317
1318 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1319
1320 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1321 {
1322 return (op_encode_hdr_size) * sizeof(__be32);
1323 }
1324
1325 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1326 {
1327 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1328 }
1329
1330 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1331 {
1332 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1333 }
1334
1335 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1336 {
1337 return (op_encode_hdr_size + op_encode_change_info_maxsz
1338 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1339 }
1340
1341 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1342 {
1343 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1344 * sizeof(__be32);
1345 }
1346
1347 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1348 {
1349 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1350 * sizeof(__be32);
1351 }
1352
1353 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1354 {
1355 return (op_encode_hdr_size + op_encode_stateid_maxsz
1356 + op_encode_change_info_maxsz + 1
1357 + nfs4_fattr_bitmap_maxsz
1358 + op_encode_delegation_maxsz) * sizeof(__be32);
1359 }
1360
1361 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1362 {
1363 u32 maxcount = 0, rlen = 0;
1364
1365 maxcount = svc_max_payload(rqstp);
1366 rlen = op->u.read.rd_length;
1367
1368 if (rlen > maxcount)
1369 rlen = maxcount;
1370
1371 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1372 }
1373
1374 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1375 {
1376 u32 rlen = op->u.readdir.rd_maxcount;
1377
1378 if (rlen > PAGE_SIZE)
1379 rlen = PAGE_SIZE;
1380
1381 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1382 * sizeof(__be32) + rlen;
1383 }
1384
1385 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1386 {
1387 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1388 * sizeof(__be32);
1389 }
1390
1391 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1392 {
1393 return (op_encode_hdr_size + op_encode_change_info_maxsz
1394 + op_encode_change_info_maxsz) * sizeof(__be32);
1395 }
1396
1397 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1398 {
1399 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1400 }
1401
1402 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1403 {
1404 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1405 }
1406
1407 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1408 {
1409 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1410 }
1411
1412 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1413 {
1414 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1415 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1416 2 + /*eir_server_owner.so_minor_id */\
1417 /* eir_server_owner.so_major_id<> */\
1418 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1419 /* eir_server_scope<> */\
1420 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1421 1 + /* eir_server_impl_id array length */\
1422 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1423 }
1424
1425 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1426 {
1427 return (op_encode_hdr_size + \
1428 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1429 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1430 }
1431
1432 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1433 {
1434 return (op_encode_hdr_size + \
1435 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1436 2 + /* csr_sequence, csr_flags */\
1437 op_encode_channel_attrs_maxsz + \
1438 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1439 }
1440
1441 static struct nfsd4_operation nfsd4_ops[] = {
1442 [OP_ACCESS] = {
1443 .op_func = (nfsd4op_func)nfsd4_access,
1444 .op_name = "OP_ACCESS",
1445 },
1446 [OP_CLOSE] = {
1447 .op_func = (nfsd4op_func)nfsd4_close,
1448 .op_flags = OP_MODIFIES_SOMETHING,
1449 .op_name = "OP_CLOSE",
1450 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1451 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1452 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1453 },
1454 [OP_COMMIT] = {
1455 .op_func = (nfsd4op_func)nfsd4_commit,
1456 .op_flags = OP_MODIFIES_SOMETHING,
1457 .op_name = "OP_COMMIT",
1458 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1459 },
1460 [OP_CREATE] = {
1461 .op_func = (nfsd4op_func)nfsd4_create,
1462 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1463 .op_name = "OP_CREATE",
1464 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1465 },
1466 [OP_DELEGRETURN] = {
1467 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1468 .op_flags = OP_MODIFIES_SOMETHING,
1469 .op_name = "OP_DELEGRETURN",
1470 .op_rsize_bop = nfsd4_only_status_rsize,
1471 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1472 },
1473 [OP_GETATTR] = {
1474 .op_func = (nfsd4op_func)nfsd4_getattr,
1475 .op_flags = ALLOWED_ON_ABSENT_FS,
1476 .op_name = "OP_GETATTR",
1477 },
1478 [OP_GETFH] = {
1479 .op_func = (nfsd4op_func)nfsd4_getfh,
1480 .op_name = "OP_GETFH",
1481 },
1482 [OP_LINK] = {
1483 .op_func = (nfsd4op_func)nfsd4_link,
1484 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1485 | OP_CACHEME,
1486 .op_name = "OP_LINK",
1487 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1488 },
1489 [OP_LOCK] = {
1490 .op_func = (nfsd4op_func)nfsd4_lock,
1491 .op_flags = OP_MODIFIES_SOMETHING,
1492 .op_name = "OP_LOCK",
1493 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1494 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1495 },
1496 [OP_LOCKT] = {
1497 .op_func = (nfsd4op_func)nfsd4_lockt,
1498 .op_name = "OP_LOCKT",
1499 },
1500 [OP_LOCKU] = {
1501 .op_func = (nfsd4op_func)nfsd4_locku,
1502 .op_flags = OP_MODIFIES_SOMETHING,
1503 .op_name = "OP_LOCKU",
1504 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1505 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1506 },
1507 [OP_LOOKUP] = {
1508 .op_func = (nfsd4op_func)nfsd4_lookup,
1509 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1510 .op_name = "OP_LOOKUP",
1511 },
1512 [OP_LOOKUPP] = {
1513 .op_func = (nfsd4op_func)nfsd4_lookupp,
1514 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1515 .op_name = "OP_LOOKUPP",
1516 },
1517 [OP_NVERIFY] = {
1518 .op_func = (nfsd4op_func)nfsd4_nverify,
1519 .op_name = "OP_NVERIFY",
1520 },
1521 [OP_OPEN] = {
1522 .op_func = (nfsd4op_func)nfsd4_open,
1523 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1524 .op_name = "OP_OPEN",
1525 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1526 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1527 },
1528 [OP_OPEN_CONFIRM] = {
1529 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1530 .op_flags = OP_MODIFIES_SOMETHING,
1531 .op_name = "OP_OPEN_CONFIRM",
1532 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1533 },
1534 [OP_OPEN_DOWNGRADE] = {
1535 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1536 .op_flags = OP_MODIFIES_SOMETHING,
1537 .op_name = "OP_OPEN_DOWNGRADE",
1538 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1539 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1540 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1541 },
1542 [OP_PUTFH] = {
1543 .op_func = (nfsd4op_func)nfsd4_putfh,
1544 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1545 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1546 | OP_CLEAR_STATEID,
1547 .op_name = "OP_PUTFH",
1548 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1549 },
1550 [OP_PUTPUBFH] = {
1551 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1552 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1553 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1554 | OP_CLEAR_STATEID,
1555 .op_name = "OP_PUTPUBFH",
1556 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1557 },
1558 [OP_PUTROOTFH] = {
1559 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1560 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1561 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1562 | OP_CLEAR_STATEID,
1563 .op_name = "OP_PUTROOTFH",
1564 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1565 },
1566 [OP_READ] = {
1567 .op_func = (nfsd4op_func)nfsd4_read,
1568 .op_flags = OP_MODIFIES_SOMETHING,
1569 .op_name = "OP_READ",
1570 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1571 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1572 },
1573 [OP_READDIR] = {
1574 .op_func = (nfsd4op_func)nfsd4_readdir,
1575 .op_flags = OP_MODIFIES_SOMETHING,
1576 .op_name = "OP_READDIR",
1577 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1578 },
1579 [OP_READLINK] = {
1580 .op_func = (nfsd4op_func)nfsd4_readlink,
1581 .op_name = "OP_READLINK",
1582 },
1583 [OP_REMOVE] = {
1584 .op_func = (nfsd4op_func)nfsd4_remove,
1585 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1586 .op_name = "OP_REMOVE",
1587 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1588 },
1589 [OP_RENAME] = {
1590 .op_func = (nfsd4op_func)nfsd4_rename,
1591 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1592 .op_name = "OP_RENAME",
1593 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1594 },
1595 [OP_RENEW] = {
1596 .op_func = (nfsd4op_func)nfsd4_renew,
1597 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1598 | OP_MODIFIES_SOMETHING,
1599 .op_name = "OP_RENEW",
1600 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1601
1602 },
1603 [OP_RESTOREFH] = {
1604 .op_func = (nfsd4op_func)nfsd4_restorefh,
1605 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1606 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1607 .op_name = "OP_RESTOREFH",
1608 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1609 },
1610 [OP_SAVEFH] = {
1611 .op_func = (nfsd4op_func)nfsd4_savefh,
1612 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1613 .op_name = "OP_SAVEFH",
1614 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1615 },
1616 [OP_SECINFO] = {
1617 .op_func = (nfsd4op_func)nfsd4_secinfo,
1618 .op_flags = OP_HANDLES_WRONGSEC,
1619 .op_name = "OP_SECINFO",
1620 },
1621 [OP_SETATTR] = {
1622 .op_func = (nfsd4op_func)nfsd4_setattr,
1623 .op_name = "OP_SETATTR",
1624 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1625 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1626 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1627 },
1628 [OP_SETCLIENTID] = {
1629 .op_func = (nfsd4op_func)nfsd4_setclientid,
1630 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1631 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1632 .op_name = "OP_SETCLIENTID",
1633 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1634 },
1635 [OP_SETCLIENTID_CONFIRM] = {
1636 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1637 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1638 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1639 .op_name = "OP_SETCLIENTID_CONFIRM",
1640 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1641 },
1642 [OP_VERIFY] = {
1643 .op_func = (nfsd4op_func)nfsd4_verify,
1644 .op_name = "OP_VERIFY",
1645 },
1646 [OP_WRITE] = {
1647 .op_func = (nfsd4op_func)nfsd4_write,
1648 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1649 .op_name = "OP_WRITE",
1650 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1651 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1652 },
1653 [OP_RELEASE_LOCKOWNER] = {
1654 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1655 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1656 | OP_MODIFIES_SOMETHING,
1657 .op_name = "OP_RELEASE_LOCKOWNER",
1658 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1659 },
1660
1661 /* NFSv4.1 operations */
1662 [OP_EXCHANGE_ID] = {
1663 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1664 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1665 | OP_MODIFIES_SOMETHING,
1666 .op_name = "OP_EXCHANGE_ID",
1667 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1668 },
1669 [OP_BIND_CONN_TO_SESSION] = {
1670 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1671 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1672 | OP_MODIFIES_SOMETHING,
1673 .op_name = "OP_BIND_CONN_TO_SESSION",
1674 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1675 },
1676 [OP_CREATE_SESSION] = {
1677 .op_func = (nfsd4op_func)nfsd4_create_session,
1678 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1679 | OP_MODIFIES_SOMETHING,
1680 .op_name = "OP_CREATE_SESSION",
1681 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1682 },
1683 [OP_DESTROY_SESSION] = {
1684 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1685 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1686 | OP_MODIFIES_SOMETHING,
1687 .op_name = "OP_DESTROY_SESSION",
1688 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1689 },
1690 [OP_SEQUENCE] = {
1691 .op_func = (nfsd4op_func)nfsd4_sequence,
1692 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1693 .op_name = "OP_SEQUENCE",
1694 },
1695 [OP_DESTROY_CLIENTID] = {
1696 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1697 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1698 | OP_MODIFIES_SOMETHING,
1699 .op_name = "OP_DESTROY_CLIENTID",
1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1701 },
1702 [OP_RECLAIM_COMPLETE] = {
1703 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1704 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1705 .op_name = "OP_RECLAIM_COMPLETE",
1706 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1707 },
1708 [OP_SECINFO_NO_NAME] = {
1709 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1710 .op_flags = OP_HANDLES_WRONGSEC,
1711 .op_name = "OP_SECINFO_NO_NAME",
1712 },
1713 [OP_TEST_STATEID] = {
1714 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1715 .op_flags = ALLOWED_WITHOUT_FH,
1716 .op_name = "OP_TEST_STATEID",
1717 },
1718 [OP_FREE_STATEID] = {
1719 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1720 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1721 .op_name = "OP_FREE_STATEID",
1722 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1723 },
1724 };
1725
1726 #ifdef NFSD_DEBUG
1727 static const char *nfsd4_op_name(unsigned opnum)
1728 {
1729 if (opnum < ARRAY_SIZE(nfsd4_ops))
1730 return nfsd4_ops[opnum].op_name;
1731 return "unknown_operation";
1732 }
1733 #endif
1734
1735 #define nfsd4_voidres nfsd4_voidargs
1736 struct nfsd4_voidargs { int dummy; };
1737
1738 static struct svc_procedure nfsd_procedures4[2] = {
1739 [NFSPROC4_NULL] = {
1740 .pc_func = (svc_procfunc) nfsd4_proc_null,
1741 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1742 .pc_argsize = sizeof(struct nfsd4_voidargs),
1743 .pc_ressize = sizeof(struct nfsd4_voidres),
1744 .pc_cachetype = RC_NOCACHE,
1745 .pc_xdrressize = 1,
1746 },
1747 [NFSPROC4_COMPOUND] = {
1748 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1749 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1750 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1751 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1752 .pc_ressize = sizeof(struct nfsd4_compoundres),
1753 .pc_release = nfsd4_release_compoundargs,
1754 .pc_cachetype = RC_NOCACHE,
1755 .pc_xdrressize = NFSD_BUFSIZE/4,
1756 },
1757 };
1758
1759 struct svc_version nfsd_version4 = {
1760 .vs_vers = 4,
1761 .vs_nproc = 2,
1762 .vs_proc = nfsd_procedures4,
1763 .vs_dispatch = nfsd_dispatch,
1764 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1765 };
1766
1767 /*
1768 * Local variables:
1769 * c-basic-offset: 8
1770 * End:
1771 */
(deprecated) Btrfs devel tree