Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4proc.c
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 #include "netns.h"
44
45 #define NFSDDBG_FACILITY NFSDDBG_PROC
46
47 static u32 nfsd_attrmask[] = {
48 NFSD_WRITEABLE_ATTRS_WORD0,
49 NFSD_WRITEABLE_ATTRS_WORD1,
50 NFSD_WRITEABLE_ATTRS_WORD2
51 };
52
53 static u32 nfsd41_ex_attrmask[] = {
54 NFSD_SUPPATTR_EXCLCREAT_WORD0,
55 NFSD_SUPPATTR_EXCLCREAT_WORD1,
56 NFSD_SUPPATTR_EXCLCREAT_WORD2
57 };
58
59 static __be32
60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
61 u32 *bmval, u32 *writable)
62 {
63 struct dentry *dentry = cstate->current_fh.fh_dentry;
64
65 /*
66 * Check about attributes are supported by the NFSv4 server or not.
67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
68 */
69 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
70 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
71 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
72 return nfserr_attrnotsupp;
73
74 /*
75 * Check FATTR4_WORD0_ACL can be supported
76 * in current environment or not.
77 */
78 if (bmval[0] & FATTR4_WORD0_ACL) {
79 if (!IS_POSIXACL(dentry->d_inode))
80 return nfserr_attrnotsupp;
81 }
82
83 /*
84 * According to spec, read-only attributes return ERR_INVAL.
85 */
86 if (writable) {
87 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
88 (bmval[2] & ~writable[2]))
89 return nfserr_inval;
90 }
91
92 return nfs_ok;
93 }
94
95 static __be32
96 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
97 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
98 {
99 __be32 status = nfs_ok;
100
101 if (open->op_create == NFS4_OPEN_CREATE) {
102 if (open->op_createmode == NFS4_CREATE_UNCHECKED
103 || open->op_createmode == NFS4_CREATE_GUARDED)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd_attrmask);
106 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
107 status = check_attr_support(rqstp, cstate,
108 open->op_bmval, nfsd41_ex_attrmask);
109 }
110
111 return status;
112 }
113
114 static int
115 is_create_with_attrs(struct nfsd4_open *open)
116 {
117 return open->op_create == NFS4_OPEN_CREATE
118 && (open->op_createmode == NFS4_CREATE_UNCHECKED
119 || open->op_createmode == NFS4_CREATE_GUARDED
120 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
121 }
122
123 /*
124 * if error occurs when setting the acl, just clear the acl bit
125 * in the returned attr bitmap.
126 */
127 static void
128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
129 struct nfs4_acl *acl, u32 *bmval)
130 {
131 __be32 status;
132
133 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
134 if (status)
135 /*
136 * We should probably fail the whole open at this point,
137 * but we've already created the file, so it's too late;
138 * So this seems the least of evils:
139 */
140 bmval[0] &= ~FATTR4_WORD0_ACL;
141 }
142
143 static inline void
144 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
145 {
146 fh_put(dst);
147 dget(src->fh_dentry);
148 if (src->fh_export)
149 cache_get(&src->fh_export->h);
150 *dst = *src;
151 }
152
153 static __be32
154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
155 {
156 __be32 status;
157
158 if (open->op_truncate &&
159 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
160 return nfserr_inval;
161
162 accmode |= NFSD_MAY_READ_IF_EXEC;
163
164 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
165 accmode |= NFSD_MAY_READ;
166 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
167 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
168 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
169 accmode |= NFSD_MAY_WRITE;
170
171 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
172
173 return status;
174 }
175
176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
177 {
178 umode_t mode = fh->fh_dentry->d_inode->i_mode;
179
180 if (S_ISREG(mode))
181 return nfs_ok;
182 if (S_ISDIR(mode))
183 return nfserr_isdir;
184 /*
185 * Using err_symlink as our catch-all case may look odd; but
186 * there's no other obvious error for this case in 4.0, and we
187 * happen to know that it will cause the linux v4 client to do
188 * the right thing on attempts to open something other than a
189 * regular file.
190 */
191 return nfserr_symlink;
192 }
193
194 static __be32
195 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
196 {
197 struct svc_fh *resfh;
198 int accmode;
199 __be32 status;
200
201 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
202 if (!resfh)
203 return nfserr_jukebox;
204 fh_init(resfh, NFS4_FHSIZE);
205 open->op_truncate = 0;
206
207 if (open->op_create) {
208 /* FIXME: check session persistence and pnfs flags.
209 * The nfsv4.1 spec requires the following semantics:
210 *
211 * Persistent | pNFS | Server REQUIRED | Client Allowed
212 * Reply Cache | server | |
213 * -------------+--------+-----------------+--------------------
214 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
215 * | | | (SHOULD)
216 * | | and EXCLUSIVE4 | or EXCLUSIVE4
217 * | | | (SHOULD NOT)
218 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
219 * yes | no | GUARDED4 | GUARDED4
220 * yes | yes | GUARDED4 | GUARDED4
221 */
222
223 /*
224 * Note: create modes (UNCHECKED,GUARDED...) are the same
225 * in NFSv4 as in v3 except EXCLUSIVE4_1.
226 */
227 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
228 open->op_fname.len, &open->op_iattr,
229 resfh, open->op_createmode,
230 (u32 *)open->op_verf.data,
231 &open->op_truncate, &open->op_created);
232
233 /*
234 * Following rfc 3530 14.2.16, use the returned bitmask
235 * to indicate which attributes we used to store the
236 * verifier:
237 */
238 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
239 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
240 FATTR4_WORD1_TIME_MODIFY);
241 } else {
242 status = nfsd_lookup(rqstp, current_fh,
243 open->op_fname.data, open->op_fname.len, resfh);
244 fh_unlock(current_fh);
245 }
246 if (status)
247 goto out;
248 status = nfsd_check_obj_isreg(resfh);
249 if (status)
250 goto out;
251
252 if (is_create_with_attrs(open) && open->op_acl != NULL)
253 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
254
255 /* set reply cache */
256 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
257 &resfh->fh_handle);
258 accmode = NFSD_MAY_NOP;
259 if (open->op_created)
260 accmode |= NFSD_MAY_OWNER_OVERRIDE;
261 status = do_open_permission(rqstp, resfh, open, accmode);
262 set_change_info(&open->op_cinfo, current_fh);
263 fh_dup2(current_fh, resfh);
264 out:
265 fh_put(resfh);
266 kfree(resfh);
267 return status;
268 }
269
270 static __be32
271 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
272 {
273 __be32 status;
274
275 /* We don't know the target directory, and therefore can not
276 * set the change info
277 */
278
279 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
280
281 /* set replay cache */
282 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
283 &current_fh->fh_handle);
284
285 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
286 (open->op_iattr.ia_size == 0);
287
288 status = do_open_permission(rqstp, current_fh, open,
289 NFSD_MAY_OWNER_OVERRIDE);
290
291 return status;
292 }
293
294 static void
295 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
296 {
297 struct nfsd4_sessionid *sid =
298 (struct nfsd4_sessionid *)session->se_sessionid.data;
299
300 clid->cl_boot = sid->clientid.cl_boot;
301 clid->cl_id = sid->clientid.cl_id;
302 }
303
304 static __be32
305 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
306 struct nfsd4_open *open)
307 {
308 __be32 status;
309 struct nfsd4_compoundres *resp;
310 struct net *net = SVC_NET(rqstp);
311 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
312
313 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
314 (int)open->op_fname.len, open->op_fname.data,
315 open->op_openowner);
316
317 /* This check required by spec. */
318 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
319 return nfserr_inval;
320
321 open->op_created = 0;
322 /*
323 * RFC5661 18.51.3
324 * Before RECLAIM_COMPLETE done, server should deny new lock
325 */
326 if (nfsd4_has_session(cstate) &&
327 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
328 &cstate->session->se_client->cl_flags) &&
329 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
330 return nfserr_grace;
331
332 if (nfsd4_has_session(cstate))
333 copy_clientid(&open->op_clientid, cstate->session);
334
335 nfs4_lock_state();
336
337 /* check seqid for replay. set nfs4_owner */
338 resp = rqstp->rq_resp;
339 status = nfsd4_process_open1(&resp->cstate, open, nn);
340 if (status == nfserr_replay_me) {
341 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
342 fh_put(&cstate->current_fh);
343 fh_copy_shallow(&cstate->current_fh.fh_handle,
344 &rp->rp_openfh);
345 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
346 if (status)
347 dprintk("nfsd4_open: replay failed"
348 " restoring previous filehandle\n");
349 else
350 status = nfserr_replay_me;
351 }
352 if (status)
353 goto out;
354
355 status = nfsd4_check_open_attributes(rqstp, cstate, open);
356 if (status)
357 goto out;
358
359 /* Openowner is now set, so sequence id will get bumped. Now we need
360 * these checks before we do any creates: */
361 status = nfserr_grace;
362 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
363 goto out;
364 status = nfserr_no_grace;
365 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
366 goto out;
367
368 switch (open->op_claim_type) {
369 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
370 case NFS4_OPEN_CLAIM_NULL:
371 status = do_open_lookup(rqstp, &cstate->current_fh,
372 open);
373 if (status)
374 goto out;
375 break;
376 case NFS4_OPEN_CLAIM_PREVIOUS:
377 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
378 status = nfs4_check_open_reclaim(&open->op_clientid,
379 cstate->minorversion,
380 nn);
381 if (status)
382 goto out;
383 case NFS4_OPEN_CLAIM_FH:
384 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
385 status = do_open_fhandle(rqstp, &cstate->current_fh,
386 open);
387 if (status)
388 goto out;
389 break;
390 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
391 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
392 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
393 dprintk("NFSD: unsupported OPEN claim type %d\n",
394 open->op_claim_type);
395 status = nfserr_notsupp;
396 goto out;
397 default:
398 dprintk("NFSD: Invalid OPEN claim type %d\n",
399 open->op_claim_type);
400 status = nfserr_inval;
401 goto out;
402 }
403 /*
404 * nfsd4_process_open2() does the actual opening of the file. If
405 * successful, it (1) truncates the file if open->op_truncate was
406 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
407 */
408 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
409 WARN_ON(status && open->op_created);
410 out:
411 nfsd4_cleanup_open_state(open, status);
412 if (open->op_openowner)
413 cstate->replay_owner = &open->op_openowner->oo_owner;
414 else
415 nfs4_unlock_state();
416 return status;
417 }
418
419 /*
420 * filehandle-manipulating ops.
421 */
422 static __be32
423 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
424 struct svc_fh **getfh)
425 {
426 if (!cstate->current_fh.fh_dentry)
427 return nfserr_nofilehandle;
428
429 *getfh = &cstate->current_fh;
430 return nfs_ok;
431 }
432
433 static __be32
434 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
435 struct nfsd4_putfh *putfh)
436 {
437 fh_put(&cstate->current_fh);
438 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
439 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
440 putfh->pf_fhlen);
441 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
442 }
443
444 static __be32
445 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
446 void *arg)
447 {
448 __be32 status;
449
450 fh_put(&cstate->current_fh);
451 status = exp_pseudoroot(rqstp, &cstate->current_fh);
452 return status;
453 }
454
455 static __be32
456 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
457 void *arg)
458 {
459 if (!cstate->save_fh.fh_dentry)
460 return nfserr_restorefh;
461
462 fh_dup2(&cstate->current_fh, &cstate->save_fh);
463 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
464 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
465 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
466 }
467 return nfs_ok;
468 }
469
470 static __be32
471 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
472 void *arg)
473 {
474 if (!cstate->current_fh.fh_dentry)
475 return nfserr_nofilehandle;
476
477 fh_dup2(&cstate->save_fh, &cstate->current_fh);
478 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
479 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
480 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
481 }
482 return nfs_ok;
483 }
484
485 /*
486 * misc nfsv4 ops
487 */
488 static __be32
489 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
490 struct nfsd4_access *access)
491 {
492 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
493 return nfserr_inval;
494
495 access->ac_resp_access = access->ac_req_access;
496 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
497 &access->ac_supported);
498 }
499
500 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
501 {
502 __be32 verf[2];
503 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
504
505 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
506 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
507 memcpy(verifier->data, verf, sizeof(verifier->data));
508 }
509
510 static __be32
511 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
512 struct nfsd4_commit *commit)
513 {
514 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
515 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
516 commit->co_count);
517 }
518
519 static __be32
520 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
521 struct nfsd4_create *create)
522 {
523 struct svc_fh resfh;
524 __be32 status;
525 dev_t rdev;
526
527 fh_init(&resfh, NFS4_FHSIZE);
528
529 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
530 NFSD_MAY_CREATE);
531 if (status)
532 return status;
533
534 status = check_attr_support(rqstp, cstate, create->cr_bmval,
535 nfsd_attrmask);
536 if (status)
537 return status;
538
539 switch (create->cr_type) {
540 case NF4LNK:
541 /* ugh! we have to null-terminate the linktext, or
542 * vfs_symlink() will choke. it is always safe to
543 * null-terminate by brute force, since at worst we
544 * will overwrite the first byte of the create namelen
545 * in the XDR buffer, which has already been extracted
546 * during XDR decode.
547 */
548 create->cr_linkname[create->cr_linklen] = 0;
549
550 status = nfsd_symlink(rqstp, &cstate->current_fh,
551 create->cr_name, create->cr_namelen,
552 create->cr_linkname, create->cr_linklen,
553 &resfh, &create->cr_iattr);
554 break;
555
556 case NF4BLK:
557 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
558 if (MAJOR(rdev) != create->cr_specdata1 ||
559 MINOR(rdev) != create->cr_specdata2)
560 return nfserr_inval;
561 status = nfsd_create(rqstp, &cstate->current_fh,
562 create->cr_name, create->cr_namelen,
563 &create->cr_iattr, S_IFBLK, rdev, &resfh);
564 break;
565
566 case NF4CHR:
567 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
568 if (MAJOR(rdev) != create->cr_specdata1 ||
569 MINOR(rdev) != create->cr_specdata2)
570 return nfserr_inval;
571 status = nfsd_create(rqstp, &cstate->current_fh,
572 create->cr_name, create->cr_namelen,
573 &create->cr_iattr,S_IFCHR, rdev, &resfh);
574 break;
575
576 case NF4SOCK:
577 status = nfsd_create(rqstp, &cstate->current_fh,
578 create->cr_name, create->cr_namelen,
579 &create->cr_iattr, S_IFSOCK, 0, &resfh);
580 break;
581
582 case NF4FIFO:
583 status = nfsd_create(rqstp, &cstate->current_fh,
584 create->cr_name, create->cr_namelen,
585 &create->cr_iattr, S_IFIFO, 0, &resfh);
586 break;
587
588 case NF4DIR:
589 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
590 status = nfsd_create(rqstp, &cstate->current_fh,
591 create->cr_name, create->cr_namelen,
592 &create->cr_iattr, S_IFDIR, 0, &resfh);
593 break;
594
595 default:
596 status = nfserr_badtype;
597 }
598
599 if (status)
600 goto out;
601
602 if (create->cr_acl != NULL)
603 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
604 create->cr_bmval);
605
606 fh_unlock(&cstate->current_fh);
607 set_change_info(&create->cr_cinfo, &cstate->current_fh);
608 fh_dup2(&cstate->current_fh, &resfh);
609 out:
610 fh_put(&resfh);
611 return status;
612 }
613
614 static __be32
615 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
616 struct nfsd4_getattr *getattr)
617 {
618 __be32 status;
619
620 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
621 if (status)
622 return status;
623
624 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
625 return nfserr_inval;
626
627 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
628 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
629 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
630
631 getattr->ga_fhp = &cstate->current_fh;
632 return nfs_ok;
633 }
634
635 static __be32
636 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
637 struct nfsd4_link *link)
638 {
639 __be32 status = nfserr_nofilehandle;
640
641 if (!cstate->save_fh.fh_dentry)
642 return status;
643 status = nfsd_link(rqstp, &cstate->current_fh,
644 link->li_name, link->li_namelen, &cstate->save_fh);
645 if (!status)
646 set_change_info(&link->li_cinfo, &cstate->current_fh);
647 return status;
648 }
649
650 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
651 {
652 struct svc_fh tmp_fh;
653 __be32 ret;
654
655 fh_init(&tmp_fh, NFS4_FHSIZE);
656 ret = exp_pseudoroot(rqstp, &tmp_fh);
657 if (ret)
658 return ret;
659 if (tmp_fh.fh_dentry == fh->fh_dentry) {
660 fh_put(&tmp_fh);
661 return nfserr_noent;
662 }
663 fh_put(&tmp_fh);
664 return nfsd_lookup(rqstp, fh, "..", 2, fh);
665 }
666
667 static __be32
668 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
669 void *arg)
670 {
671 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
672 }
673
674 static __be32
675 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
676 struct nfsd4_lookup *lookup)
677 {
678 return nfsd_lookup(rqstp, &cstate->current_fh,
679 lookup->lo_name, lookup->lo_len,
680 &cstate->current_fh);
681 }
682
683 static __be32
684 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
685 struct nfsd4_read *read)
686 {
687 __be32 status;
688
689 /* no need to check permission - this will be done in nfsd_read() */
690
691 read->rd_filp = NULL;
692 if (read->rd_offset >= OFFSET_MAX)
693 return nfserr_inval;
694
695 /*
696 * If we do a zero copy read, then a client will see read data
697 * that reflects the state of the file *after* performing the
698 * following compound.
699 *
700 * To ensure proper ordering, we therefore turn off zero copy if
701 * the client wants us to do more in this compound:
702 */
703 if (!nfsd4_last_compound_op(rqstp))
704 rqstp->rq_splice_ok = false;
705
706 nfs4_lock_state();
707 /* check stateid */
708 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
709 cstate, &read->rd_stateid,
710 RD_STATE, &read->rd_filp))) {
711 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
712 goto out;
713 }
714 if (read->rd_filp)
715 get_file(read->rd_filp);
716 status = nfs_ok;
717 out:
718 nfs4_unlock_state();
719 read->rd_rqstp = rqstp;
720 read->rd_fhp = &cstate->current_fh;
721 return status;
722 }
723
724 static __be32
725 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726 struct nfsd4_readdir *readdir)
727 {
728 u64 cookie = readdir->rd_cookie;
729 static const nfs4_verifier zeroverf;
730
731 /* no need to check permission - this will be done in nfsd_readdir() */
732
733 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
734 return nfserr_inval;
735
736 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
737 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
738 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
739
740 if ((cookie == 1) || (cookie == 2) ||
741 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
742 return nfserr_bad_cookie;
743
744 readdir->rd_rqstp = rqstp;
745 readdir->rd_fhp = &cstate->current_fh;
746 return nfs_ok;
747 }
748
749 static __be32
750 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
751 struct nfsd4_readlink *readlink)
752 {
753 readlink->rl_rqstp = rqstp;
754 readlink->rl_fhp = &cstate->current_fh;
755 return nfs_ok;
756 }
757
758 static __be32
759 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
760 struct nfsd4_remove *remove)
761 {
762 __be32 status;
763
764 if (locks_in_grace(SVC_NET(rqstp)))
765 return nfserr_grace;
766 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
767 remove->rm_name, remove->rm_namelen);
768 if (!status) {
769 fh_unlock(&cstate->current_fh);
770 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
771 }
772 return status;
773 }
774
775 static __be32
776 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
777 struct nfsd4_rename *rename)
778 {
779 __be32 status = nfserr_nofilehandle;
780
781 if (!cstate->save_fh.fh_dentry)
782 return status;
783 if (locks_in_grace(SVC_NET(rqstp)) &&
784 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
785 return nfserr_grace;
786 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
787 rename->rn_snamelen, &cstate->current_fh,
788 rename->rn_tname, rename->rn_tnamelen);
789
790 /* the underlying filesystem returns different error's than required
791 * by NFSv4. both save_fh and current_fh have been verified.. */
792 if (status == nfserr_isdir)
793 status = nfserr_exist;
794 else if ((status == nfserr_notdir) &&
795 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
796 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
797 status = nfserr_exist;
798
799 if (!status) {
800 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
801 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
802 }
803 return status;
804 }
805
806 static __be32
807 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
808 struct nfsd4_secinfo *secinfo)
809 {
810 struct svc_fh resfh;
811 struct svc_export *exp;
812 struct dentry *dentry;
813 __be32 err;
814
815 fh_init(&resfh, NFS4_FHSIZE);
816 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
817 if (err)
818 return err;
819 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
820 secinfo->si_name, secinfo->si_namelen,
821 &exp, &dentry);
822 if (err)
823 return err;
824 if (dentry->d_inode == NULL) {
825 exp_put(exp);
826 err = nfserr_noent;
827 } else
828 secinfo->si_exp = exp;
829 dput(dentry);
830 if (cstate->minorversion)
831 /* See rfc 5661 section 2.6.3.1.1.8 */
832 fh_put(&cstate->current_fh);
833 return err;
834 }
835
836 static __be32
837 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
838 struct nfsd4_secinfo_no_name *sin)
839 {
840 __be32 err;
841
842 switch (sin->sin_style) {
843 case NFS4_SECINFO_STYLE4_CURRENT_FH:
844 break;
845 case NFS4_SECINFO_STYLE4_PARENT:
846 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
847 if (err)
848 return err;
849 break;
850 default:
851 return nfserr_inval;
852 }
853 exp_get(cstate->current_fh.fh_export);
854 sin->sin_exp = cstate->current_fh.fh_export;
855 fh_put(&cstate->current_fh);
856 return nfs_ok;
857 }
858
859 static __be32
860 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
861 struct nfsd4_setattr *setattr)
862 {
863 __be32 status = nfs_ok;
864 int err;
865
866 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
867 nfs4_lock_state();
868 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
869 &setattr->sa_stateid, WR_STATE, NULL);
870 nfs4_unlock_state();
871 if (status) {
872 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
873 return status;
874 }
875 }
876 err = fh_want_write(&cstate->current_fh);
877 if (err)
878 return nfserrno(err);
879 status = nfs_ok;
880
881 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
882 nfsd_attrmask);
883 if (status)
884 goto out;
885
886 if (setattr->sa_acl != NULL)
887 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
888 setattr->sa_acl);
889 if (status)
890 goto out;
891 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
892 0, (time_t)0);
893 out:
894 fh_drop_write(&cstate->current_fh);
895 return status;
896 }
897
898 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
899 {
900 int i = 1;
901 int buflen = write->wr_buflen;
902
903 vec[0].iov_base = write->wr_head.iov_base;
904 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
905 buflen -= vec[0].iov_len;
906
907 while (buflen) {
908 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
909 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
910 buflen -= vec[i].iov_len;
911 i++;
912 }
913 return i;
914 }
915
916 static __be32
917 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
918 struct nfsd4_write *write)
919 {
920 stateid_t *stateid = &write->wr_stateid;
921 struct file *filp = NULL;
922 __be32 status = nfs_ok;
923 unsigned long cnt;
924 int nvecs;
925
926 /* no need to check permission - this will be done in nfsd_write() */
927
928 if (write->wr_offset >= OFFSET_MAX)
929 return nfserr_inval;
930
931 nfs4_lock_state();
932 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
933 cstate, stateid, WR_STATE, &filp);
934 if (filp)
935 get_file(filp);
936 nfs4_unlock_state();
937
938 if (status) {
939 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
940 return status;
941 }
942
943 cnt = write->wr_buflen;
944 write->wr_how_written = write->wr_stable_how;
945 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
946
947 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
948 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
949
950 status = nfsd_write(rqstp, &cstate->current_fh, filp,
951 write->wr_offset, rqstp->rq_vec, nvecs,
952 &cnt, &write->wr_how_written);
953 if (filp)
954 fput(filp);
955
956 write->wr_bytes_written = cnt;
957
958 return status;
959 }
960
961 /* This routine never returns NFS_OK! If there are no other errors, it
962 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
963 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
964 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
965 */
966 static __be32
967 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
968 struct nfsd4_verify *verify)
969 {
970 __be32 *buf, *p;
971 int count;
972 __be32 status;
973
974 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
975 if (status)
976 return status;
977
978 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
979 if (status)
980 return status;
981
982 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
983 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
984 return nfserr_inval;
985 if (verify->ve_attrlen & 3)
986 return nfserr_inval;
987
988 /* count in words:
989 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
990 */
991 count = 4 + (verify->ve_attrlen >> 2);
992 buf = kmalloc(count << 2, GFP_KERNEL);
993 if (!buf)
994 return nfserr_jukebox;
995
996 p = buf;
997 status = nfsd4_encode_fattr(&cstate->current_fh,
998 cstate->current_fh.fh_export,
999 cstate->current_fh.fh_dentry, &p,
1000 count, verify->ve_bmval,
1001 rqstp, 0);
1002
1003 /* this means that nfsd4_encode_fattr() ran out of space */
1004 if (status == nfserr_resource)
1005 status = nfserr_not_same;
1006 if (status)
1007 goto out_kfree;
1008
1009 /* skip bitmap */
1010 p = buf + 1 + ntohl(buf[0]);
1011 status = nfserr_not_same;
1012 if (ntohl(*p++) != verify->ve_attrlen)
1013 goto out_kfree;
1014 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1015 status = nfserr_same;
1016
1017 out_kfree:
1018 kfree(buf);
1019 return status;
1020 }
1021
1022 static __be32
1023 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1024 struct nfsd4_verify *verify)
1025 {
1026 __be32 status;
1027
1028 status = _nfsd4_verify(rqstp, cstate, verify);
1029 return status == nfserr_not_same ? nfs_ok : status;
1030 }
1031
1032 static __be32
1033 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1034 struct nfsd4_verify *verify)
1035 {
1036 __be32 status;
1037
1038 status = _nfsd4_verify(rqstp, cstate, verify);
1039 return status == nfserr_same ? nfs_ok : status;
1040 }
1041
1042 /*
1043 * NULL call.
1044 */
1045 static __be32
1046 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1047 {
1048 return nfs_ok;
1049 }
1050
1051 static inline void nfsd4_increment_op_stats(u32 opnum)
1052 {
1053 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1054 nfsdstats.nfs4_opcount[opnum]++;
1055 }
1056
1057 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1058 void *);
1059 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1060 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1061 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1062
1063 enum nfsd4_op_flags {
1064 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1065 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1066 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1067 /* For rfc 5661 section 2.6.3.1.1: */
1068 OP_HANDLES_WRONGSEC = 1 << 3,
1069 OP_IS_PUTFH_LIKE = 1 << 4,
1070 /*
1071 * These are the ops whose result size we estimate before
1072 * encoding, to avoid performing an op then not being able to
1073 * respond or cache a response. This includes writes and setattrs
1074 * as well as the operations usually called "nonidempotent":
1075 */
1076 OP_MODIFIES_SOMETHING = 1 << 5,
1077 /*
1078 * Cache compounds containing these ops in the xid-based drc:
1079 * We use the DRC for compounds containing non-idempotent
1080 * operations, *except* those that are 4.1-specific (since
1081 * sessions provide their own EOS), and except for stateful
1082 * operations other than setclientid and setclientid_confirm
1083 * (since sequence numbers provide EOS for open, lock, etc in
1084 * the v4.0 case).
1085 */
1086 OP_CACHEME = 1 << 6,
1087 /*
1088 * These are ops which clear current state id.
1089 */
1090 OP_CLEAR_STATEID = 1 << 7,
1091 };
1092
1093 struct nfsd4_operation {
1094 nfsd4op_func op_func;
1095 u32 op_flags;
1096 char *op_name;
1097 /* Try to get response size before operation */
1098 nfsd4op_rsize op_rsize_bop;
1099 stateid_getter op_get_currentstateid;
1100 stateid_setter op_set_currentstateid;
1101 };
1102
1103 static struct nfsd4_operation nfsd4_ops[];
1104
1105 #ifdef NFSD_DEBUG
1106 static const char *nfsd4_op_name(unsigned opnum);
1107 #endif
1108
1109 /*
1110 * Enforce NFSv4.1 COMPOUND ordering rules:
1111 *
1112 * Also note, enforced elsewhere:
1113 * - SEQUENCE other than as first op results in
1114 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1115 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1116 * (Enforced in nfsd4_bind_conn_to_session().)
1117 * - DESTROY_SESSION must be the final operation in a compound, if
1118 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1119 * (Enforced in nfsd4_destroy_session().)
1120 */
1121 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1122 {
1123 struct nfsd4_op *op = &args->ops[0];
1124
1125 /* These ordering requirements don't apply to NFSv4.0: */
1126 if (args->minorversion == 0)
1127 return nfs_ok;
1128 /* This is weird, but OK, not our problem: */
1129 if (args->opcnt == 0)
1130 return nfs_ok;
1131 if (op->status == nfserr_op_illegal)
1132 return nfs_ok;
1133 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1134 return nfserr_op_not_in_session;
1135 if (op->opnum == OP_SEQUENCE)
1136 return nfs_ok;
1137 if (args->opcnt != 1)
1138 return nfserr_not_only_op;
1139 return nfs_ok;
1140 }
1141
1142 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1143 {
1144 return &nfsd4_ops[op->opnum];
1145 }
1146
1147 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1148 {
1149 return OPDESC(op)->op_flags & OP_CACHEME;
1150 }
1151
1152 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1153 {
1154 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1155 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1156 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1157 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1158 struct nfsd4_operation *thisd;
1159 struct nfsd4_operation *nextd;
1160
1161 thisd = OPDESC(this);
1162 /*
1163 * Most ops check wronsec on our own; only the putfh-like ops
1164 * have special rules.
1165 */
1166 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1167 return false;
1168 /*
1169 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1170 * put-filehandle operation if we're not going to use the
1171 * result:
1172 */
1173 if (argp->opcnt == resp->opcnt)
1174 return false;
1175
1176 nextd = OPDESC(next);
1177 /*
1178 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1179 * errors themselves as necessary; others should check for them
1180 * now:
1181 */
1182 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1183 }
1184
1185 /*
1186 * COMPOUND call.
1187 */
1188 static __be32
1189 nfsd4_proc_compound(struct svc_rqst *rqstp,
1190 struct nfsd4_compoundargs *args,
1191 struct nfsd4_compoundres *resp)
1192 {
1193 struct nfsd4_op *op;
1194 struct nfsd4_operation *opdesc;
1195 struct nfsd4_compound_state *cstate = &resp->cstate;
1196 int slack_bytes;
1197 u32 plen = 0;
1198 __be32 status;
1199
1200 resp->xbuf = &rqstp->rq_res;
1201 resp->p = rqstp->rq_res.head[0].iov_base +
1202 rqstp->rq_res.head[0].iov_len;
1203 resp->tagp = resp->p;
1204 /* reserve space for: taglen, tag, and opcnt */
1205 resp->p += 2 + XDR_QUADLEN(args->taglen);
1206 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1207 resp->taglen = args->taglen;
1208 resp->tag = args->tag;
1209 resp->opcnt = 0;
1210 resp->rqstp = rqstp;
1211 resp->cstate.minorversion = args->minorversion;
1212 resp->cstate.replay_owner = NULL;
1213 resp->cstate.session = NULL;
1214 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1215 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1216 /*
1217 * Don't use the deferral mechanism for NFSv4; compounds make it
1218 * too hard to avoid non-idempotency problems.
1219 */
1220 rqstp->rq_usedeferral = 0;
1221
1222 /*
1223 * According to RFC3010, this takes precedence over all other errors.
1224 */
1225 status = nfserr_minor_vers_mismatch;
1226 if (args->minorversion > nfsd_supported_minorversion)
1227 goto out;
1228
1229 status = nfs41_check_op_ordering(args);
1230 if (status) {
1231 op = &args->ops[0];
1232 op->status = status;
1233 goto encode_op;
1234 }
1235
1236 while (!status && resp->opcnt < args->opcnt) {
1237 op = &args->ops[resp->opcnt++];
1238
1239 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1240 resp->opcnt, args->opcnt, op->opnum,
1241 nfsd4_op_name(op->opnum));
1242 /*
1243 * The XDR decode routines may have pre-set op->status;
1244 * for example, if there is a miscellaneous XDR error
1245 * it will be set to nfserr_bad_xdr.
1246 */
1247 if (op->status)
1248 goto encode_op;
1249
1250 /* We must be able to encode a successful response to
1251 * this operation, with enough room left over to encode a
1252 * failed response to the next operation. If we don't
1253 * have enough room, fail with ERR_RESOURCE.
1254 */
1255 slack_bytes = (char *)resp->end - (char *)resp->p;
1256 if (slack_bytes < COMPOUND_SLACK_SPACE
1257 + COMPOUND_ERR_SLACK_SPACE) {
1258 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1259 op->status = nfserr_resource;
1260 goto encode_op;
1261 }
1262
1263 opdesc = OPDESC(op);
1264
1265 if (!cstate->current_fh.fh_dentry) {
1266 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1267 op->status = nfserr_nofilehandle;
1268 goto encode_op;
1269 }
1270 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1271 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1272 op->status = nfserr_moved;
1273 goto encode_op;
1274 }
1275
1276 /* If op is non-idempotent */
1277 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1278 plen = opdesc->op_rsize_bop(rqstp, op);
1279 op->status = nfsd4_check_resp_size(resp, plen);
1280 }
1281
1282 if (op->status)
1283 goto encode_op;
1284
1285 if (opdesc->op_func) {
1286 if (opdesc->op_get_currentstateid)
1287 opdesc->op_get_currentstateid(cstate, &op->u);
1288 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1289 } else
1290 BUG_ON(op->status == nfs_ok);
1291
1292 if (!op->status) {
1293 if (opdesc->op_set_currentstateid)
1294 opdesc->op_set_currentstateid(cstate, &op->u);
1295
1296 if (opdesc->op_flags & OP_CLEAR_STATEID)
1297 clear_current_stateid(cstate);
1298
1299 if (need_wrongsec_check(rqstp))
1300 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1301 }
1302
1303 encode_op:
1304 /* Only from SEQUENCE */
1305 if (resp->cstate.status == nfserr_replay_cache) {
1306 dprintk("%s NFS4.1 replay from cache\n", __func__);
1307 status = op->status;
1308 goto out;
1309 }
1310 if (op->status == nfserr_replay_me) {
1311 op->replay = &cstate->replay_owner->so_replay;
1312 nfsd4_encode_replay(resp, op);
1313 status = op->status = op->replay->rp_status;
1314 } else {
1315 nfsd4_encode_operation(resp, op);
1316 status = op->status;
1317 }
1318
1319 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1320 args->ops, args->opcnt, resp->opcnt, op->opnum,
1321 be32_to_cpu(status));
1322
1323 if (cstate->replay_owner) {
1324 nfs4_unlock_state();
1325 cstate->replay_owner = NULL;
1326 }
1327 /* XXX Ugh, we need to get rid of this kind of special case: */
1328 if (op->opnum == OP_READ && op->u.read.rd_filp)
1329 fput(op->u.read.rd_filp);
1330
1331 nfsd4_increment_op_stats(op->opnum);
1332 }
1333
1334 resp->cstate.status = status;
1335 fh_put(&resp->cstate.current_fh);
1336 fh_put(&resp->cstate.save_fh);
1337 BUG_ON(resp->cstate.replay_owner);
1338 out:
1339 /* Reset deferral mechanism for RPC deferrals */
1340 rqstp->rq_usedeferral = 1;
1341 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1342 return status;
1343 }
1344
1345 #define op_encode_hdr_size (2)
1346 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1347 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1348 #define op_encode_change_info_maxsz (5)
1349 #define nfs4_fattr_bitmap_maxsz (4)
1350
1351 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1352 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1353
1354 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1355
1356 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1357 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1358 op_encode_ace_maxsz)
1359
1360 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1361
1362 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1363 {
1364 return (op_encode_hdr_size) * sizeof(__be32);
1365 }
1366
1367 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1368 {
1369 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1370 }
1371
1372 static inline u32 nfsd4_commit_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_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1378 {
1379 return (op_encode_hdr_size + op_encode_change_info_maxsz
1380 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1381 }
1382
1383 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1384 {
1385 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1386 * sizeof(__be32);
1387 }
1388
1389 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1390 {
1391 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1392 * sizeof(__be32);
1393 }
1394
1395 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1396 {
1397 return (op_encode_hdr_size + op_encode_stateid_maxsz
1398 + op_encode_change_info_maxsz + 1
1399 + nfs4_fattr_bitmap_maxsz
1400 + op_encode_delegation_maxsz) * sizeof(__be32);
1401 }
1402
1403 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1404 {
1405 u32 maxcount = 0, rlen = 0;
1406
1407 maxcount = svc_max_payload(rqstp);
1408 rlen = op->u.read.rd_length;
1409
1410 if (rlen > maxcount)
1411 rlen = maxcount;
1412
1413 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1414 }
1415
1416 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1417 {
1418 u32 rlen = op->u.readdir.rd_maxcount;
1419
1420 if (rlen > PAGE_SIZE)
1421 rlen = PAGE_SIZE;
1422
1423 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1424 * sizeof(__be32) + rlen;
1425 }
1426
1427 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1428 {
1429 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1430 * sizeof(__be32);
1431 }
1432
1433 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1434 {
1435 return (op_encode_hdr_size + op_encode_change_info_maxsz
1436 + op_encode_change_info_maxsz) * sizeof(__be32);
1437 }
1438
1439 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1440 {
1441 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1442 }
1443
1444 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1445 {
1446 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1447 }
1448
1449 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1450 {
1451 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1452 }
1453
1454 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1455 {
1456 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1457 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1458 2 + /*eir_server_owner.so_minor_id */\
1459 /* eir_server_owner.so_major_id<> */\
1460 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1461 /* eir_server_scope<> */\
1462 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1463 1 + /* eir_server_impl_id array length */\
1464 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1465 }
1466
1467 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1468 {
1469 return (op_encode_hdr_size + \
1470 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1471 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1472 }
1473
1474 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1475 {
1476 return (op_encode_hdr_size + \
1477 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1478 2 + /* csr_sequence, csr_flags */\
1479 op_encode_channel_attrs_maxsz + \
1480 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1481 }
1482
1483 static struct nfsd4_operation nfsd4_ops[] = {
1484 [OP_ACCESS] = {
1485 .op_func = (nfsd4op_func)nfsd4_access,
1486 .op_name = "OP_ACCESS",
1487 },
1488 [OP_CLOSE] = {
1489 .op_func = (nfsd4op_func)nfsd4_close,
1490 .op_flags = OP_MODIFIES_SOMETHING,
1491 .op_name = "OP_CLOSE",
1492 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1493 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1494 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1495 },
1496 [OP_COMMIT] = {
1497 .op_func = (nfsd4op_func)nfsd4_commit,
1498 .op_flags = OP_MODIFIES_SOMETHING,
1499 .op_name = "OP_COMMIT",
1500 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1501 },
1502 [OP_CREATE] = {
1503 .op_func = (nfsd4op_func)nfsd4_create,
1504 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1505 .op_name = "OP_CREATE",
1506 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1507 },
1508 [OP_DELEGRETURN] = {
1509 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1510 .op_flags = OP_MODIFIES_SOMETHING,
1511 .op_name = "OP_DELEGRETURN",
1512 .op_rsize_bop = nfsd4_only_status_rsize,
1513 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1514 },
1515 [OP_GETATTR] = {
1516 .op_func = (nfsd4op_func)nfsd4_getattr,
1517 .op_flags = ALLOWED_ON_ABSENT_FS,
1518 .op_name = "OP_GETATTR",
1519 },
1520 [OP_GETFH] = {
1521 .op_func = (nfsd4op_func)nfsd4_getfh,
1522 .op_name = "OP_GETFH",
1523 },
1524 [OP_LINK] = {
1525 .op_func = (nfsd4op_func)nfsd4_link,
1526 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1527 | OP_CACHEME,
1528 .op_name = "OP_LINK",
1529 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1530 },
1531 [OP_LOCK] = {
1532 .op_func = (nfsd4op_func)nfsd4_lock,
1533 .op_flags = OP_MODIFIES_SOMETHING,
1534 .op_name = "OP_LOCK",
1535 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1536 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1537 },
1538 [OP_LOCKT] = {
1539 .op_func = (nfsd4op_func)nfsd4_lockt,
1540 .op_name = "OP_LOCKT",
1541 },
1542 [OP_LOCKU] = {
1543 .op_func = (nfsd4op_func)nfsd4_locku,
1544 .op_flags = OP_MODIFIES_SOMETHING,
1545 .op_name = "OP_LOCKU",
1546 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1547 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1548 },
1549 [OP_LOOKUP] = {
1550 .op_func = (nfsd4op_func)nfsd4_lookup,
1551 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1552 .op_name = "OP_LOOKUP",
1553 },
1554 [OP_LOOKUPP] = {
1555 .op_func = (nfsd4op_func)nfsd4_lookupp,
1556 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1557 .op_name = "OP_LOOKUPP",
1558 },
1559 [OP_NVERIFY] = {
1560 .op_func = (nfsd4op_func)nfsd4_nverify,
1561 .op_name = "OP_NVERIFY",
1562 },
1563 [OP_OPEN] = {
1564 .op_func = (nfsd4op_func)nfsd4_open,
1565 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1566 .op_name = "OP_OPEN",
1567 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1568 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1569 },
1570 [OP_OPEN_CONFIRM] = {
1571 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1572 .op_flags = OP_MODIFIES_SOMETHING,
1573 .op_name = "OP_OPEN_CONFIRM",
1574 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1575 },
1576 [OP_OPEN_DOWNGRADE] = {
1577 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1578 .op_flags = OP_MODIFIES_SOMETHING,
1579 .op_name = "OP_OPEN_DOWNGRADE",
1580 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1581 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1582 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1583 },
1584 [OP_PUTFH] = {
1585 .op_func = (nfsd4op_func)nfsd4_putfh,
1586 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1587 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1588 | OP_CLEAR_STATEID,
1589 .op_name = "OP_PUTFH",
1590 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1591 },
1592 [OP_PUTPUBFH] = {
1593 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1594 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1595 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1596 | OP_CLEAR_STATEID,
1597 .op_name = "OP_PUTPUBFH",
1598 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1599 },
1600 [OP_PUTROOTFH] = {
1601 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1602 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1603 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1604 | OP_CLEAR_STATEID,
1605 .op_name = "OP_PUTROOTFH",
1606 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1607 },
1608 [OP_READ] = {
1609 .op_func = (nfsd4op_func)nfsd4_read,
1610 .op_flags = OP_MODIFIES_SOMETHING,
1611 .op_name = "OP_READ",
1612 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1613 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1614 },
1615 [OP_READDIR] = {
1616 .op_func = (nfsd4op_func)nfsd4_readdir,
1617 .op_flags = OP_MODIFIES_SOMETHING,
1618 .op_name = "OP_READDIR",
1619 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1620 },
1621 [OP_READLINK] = {
1622 .op_func = (nfsd4op_func)nfsd4_readlink,
1623 .op_name = "OP_READLINK",
1624 },
1625 [OP_REMOVE] = {
1626 .op_func = (nfsd4op_func)nfsd4_remove,
1627 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1628 .op_name = "OP_REMOVE",
1629 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1630 },
1631 [OP_RENAME] = {
1632 .op_func = (nfsd4op_func)nfsd4_rename,
1633 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1634 .op_name = "OP_RENAME",
1635 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1636 },
1637 [OP_RENEW] = {
1638 .op_func = (nfsd4op_func)nfsd4_renew,
1639 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1640 | OP_MODIFIES_SOMETHING,
1641 .op_name = "OP_RENEW",
1642 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1643
1644 },
1645 [OP_RESTOREFH] = {
1646 .op_func = (nfsd4op_func)nfsd4_restorefh,
1647 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1648 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1649 .op_name = "OP_RESTOREFH",
1650 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1651 },
1652 [OP_SAVEFH] = {
1653 .op_func = (nfsd4op_func)nfsd4_savefh,
1654 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1655 .op_name = "OP_SAVEFH",
1656 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1657 },
1658 [OP_SECINFO] = {
1659 .op_func = (nfsd4op_func)nfsd4_secinfo,
1660 .op_flags = OP_HANDLES_WRONGSEC,
1661 .op_name = "OP_SECINFO",
1662 },
1663 [OP_SETATTR] = {
1664 .op_func = (nfsd4op_func)nfsd4_setattr,
1665 .op_name = "OP_SETATTR",
1666 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1667 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1668 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1669 },
1670 [OP_SETCLIENTID] = {
1671 .op_func = (nfsd4op_func)nfsd4_setclientid,
1672 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1673 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1674 .op_name = "OP_SETCLIENTID",
1675 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1676 },
1677 [OP_SETCLIENTID_CONFIRM] = {
1678 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1679 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1680 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1681 .op_name = "OP_SETCLIENTID_CONFIRM",
1682 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1683 },
1684 [OP_VERIFY] = {
1685 .op_func = (nfsd4op_func)nfsd4_verify,
1686 .op_name = "OP_VERIFY",
1687 },
1688 [OP_WRITE] = {
1689 .op_func = (nfsd4op_func)nfsd4_write,
1690 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1691 .op_name = "OP_WRITE",
1692 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1693 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1694 },
1695 [OP_RELEASE_LOCKOWNER] = {
1696 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1697 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1698 | OP_MODIFIES_SOMETHING,
1699 .op_name = "OP_RELEASE_LOCKOWNER",
1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1701 },
1702
1703 /* NFSv4.1 operations */
1704 [OP_EXCHANGE_ID] = {
1705 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1706 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1707 | OP_MODIFIES_SOMETHING,
1708 .op_name = "OP_EXCHANGE_ID",
1709 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1710 },
1711 [OP_BACKCHANNEL_CTL] = {
1712 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1713 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1714 .op_name = "OP_BACKCHANNEL_CTL",
1715 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1716 },
1717 [OP_BIND_CONN_TO_SESSION] = {
1718 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1719 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1720 | OP_MODIFIES_SOMETHING,
1721 .op_name = "OP_BIND_CONN_TO_SESSION",
1722 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1723 },
1724 [OP_CREATE_SESSION] = {
1725 .op_func = (nfsd4op_func)nfsd4_create_session,
1726 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1727 | OP_MODIFIES_SOMETHING,
1728 .op_name = "OP_CREATE_SESSION",
1729 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1730 },
1731 [OP_DESTROY_SESSION] = {
1732 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1733 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1734 | OP_MODIFIES_SOMETHING,
1735 .op_name = "OP_DESTROY_SESSION",
1736 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1737 },
1738 [OP_SEQUENCE] = {
1739 .op_func = (nfsd4op_func)nfsd4_sequence,
1740 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1741 .op_name = "OP_SEQUENCE",
1742 },
1743 [OP_DESTROY_CLIENTID] = {
1744 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1745 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1746 | OP_MODIFIES_SOMETHING,
1747 .op_name = "OP_DESTROY_CLIENTID",
1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1749 },
1750 [OP_RECLAIM_COMPLETE] = {
1751 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1752 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1753 .op_name = "OP_RECLAIM_COMPLETE",
1754 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1755 },
1756 [OP_SECINFO_NO_NAME] = {
1757 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1758 .op_flags = OP_HANDLES_WRONGSEC,
1759 .op_name = "OP_SECINFO_NO_NAME",
1760 },
1761 [OP_TEST_STATEID] = {
1762 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1763 .op_flags = ALLOWED_WITHOUT_FH,
1764 .op_name = "OP_TEST_STATEID",
1765 },
1766 [OP_FREE_STATEID] = {
1767 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1768 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1769 .op_name = "OP_FREE_STATEID",
1770 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1772 },
1773 };
1774
1775 #ifdef NFSD_DEBUG
1776 static const char *nfsd4_op_name(unsigned opnum)
1777 {
1778 if (opnum < ARRAY_SIZE(nfsd4_ops))
1779 return nfsd4_ops[opnum].op_name;
1780 return "unknown_operation";
1781 }
1782 #endif
1783
1784 #define nfsd4_voidres nfsd4_voidargs
1785 struct nfsd4_voidargs { int dummy; };
1786
1787 static struct svc_procedure nfsd_procedures4[2] = {
1788 [NFSPROC4_NULL] = {
1789 .pc_func = (svc_procfunc) nfsd4_proc_null,
1790 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1791 .pc_argsize = sizeof(struct nfsd4_voidargs),
1792 .pc_ressize = sizeof(struct nfsd4_voidres),
1793 .pc_cachetype = RC_NOCACHE,
1794 .pc_xdrressize = 1,
1795 },
1796 [NFSPROC4_COMPOUND] = {
1797 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1798 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1799 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1800 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1801 .pc_ressize = sizeof(struct nfsd4_compoundres),
1802 .pc_release = nfsd4_release_compoundargs,
1803 .pc_cachetype = RC_NOCACHE,
1804 .pc_xdrressize = NFSD_BUFSIZE/4,
1805 },
1806 };
1807
1808 struct svc_version nfsd_version4 = {
1809 .vs_vers = 4,
1810 .vs_nproc = 2,
1811 .vs_proc = nfsd_procedures4,
1812 .vs_dispatch = nfsd_dispatch,
1813 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1814 };
1815
1816 /*
1817 * Local variables:
1818 * c-basic-offset: 8
1819 * End:
1820 */