1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
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#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
46#include <linux/security.h>
47
48static inline void
49nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
50{
51 struct inode *inode = resfh->fh_dentry->d_inode;
52 int status;
53
54 mutex_lock(&inode->i_mutex);
55 status = security_inode_setsecctx(resfh->fh_dentry,
56 label->data, label->len);
57 mutex_unlock(&inode->i_mutex);
58
59 if (status)
60
61
62
63
64
65 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
66
67 return;
68}
69#else
70static inline void
71nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
72{ }
73#endif
74
75#define NFSDDBG_FACILITY NFSDDBG_PROC
76
77static u32 nfsd_attrmask[] = {
78 NFSD_WRITEABLE_ATTRS_WORD0,
79 NFSD_WRITEABLE_ATTRS_WORD1,
80 NFSD_WRITEABLE_ATTRS_WORD2
81};
82
83static u32 nfsd41_ex_attrmask[] = {
84 NFSD_SUPPATTR_EXCLCREAT_WORD0,
85 NFSD_SUPPATTR_EXCLCREAT_WORD1,
86 NFSD_SUPPATTR_EXCLCREAT_WORD2
87};
88
89static __be32
90check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
91 u32 *bmval, u32 *writable)
92{
93 struct dentry *dentry = cstate->current_fh.fh_dentry;
94
95
96
97
98
99 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
100 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
101 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
102 return nfserr_attrnotsupp;
103
104
105
106
107
108 if (bmval[0] & FATTR4_WORD0_ACL) {
109 if (!IS_POSIXACL(dentry->d_inode))
110 return nfserr_attrnotsupp;
111 }
112
113
114
115
116 if (writable) {
117 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
118 (bmval[2] & ~writable[2]))
119 return nfserr_inval;
120 }
121
122 return nfs_ok;
123}
124
125static __be32
126nfsd4_check_open_attributes(struct svc_rqst *rqstp,
127 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
128{
129 __be32 status = nfs_ok;
130
131 if (open->op_create == NFS4_OPEN_CREATE) {
132 if (open->op_createmode == NFS4_CREATE_UNCHECKED
133 || open->op_createmode == NFS4_CREATE_GUARDED)
134 status = check_attr_support(rqstp, cstate,
135 open->op_bmval, nfsd_attrmask);
136 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
137 status = check_attr_support(rqstp, cstate,
138 open->op_bmval, nfsd41_ex_attrmask);
139 }
140
141 return status;
142}
143
144static int
145is_create_with_attrs(struct nfsd4_open *open)
146{
147 return open->op_create == NFS4_OPEN_CREATE
148 && (open->op_createmode == NFS4_CREATE_UNCHECKED
149 || open->op_createmode == NFS4_CREATE_GUARDED
150 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
151}
152
153
154
155
156
157static void
158do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
159 struct nfs4_acl *acl, u32 *bmval)
160{
161 __be32 status;
162
163 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
164 if (status)
165
166
167
168
169
170 bmval[0] &= ~FATTR4_WORD0_ACL;
171}
172
173static inline void
174fh_dup2(struct svc_fh *dst, struct svc_fh *src)
175{
176 fh_put(dst);
177 dget(src->fh_dentry);
178 if (src->fh_export)
179 cache_get(&src->fh_export->h);
180 *dst = *src;
181}
182
183static __be32
184do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
185{
186 __be32 status;
187
188 if (open->op_truncate &&
189 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
190 return nfserr_inval;
191
192 accmode |= NFSD_MAY_READ_IF_EXEC;
193
194 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
195 accmode |= NFSD_MAY_READ;
196 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
197 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
198 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
199 accmode |= NFSD_MAY_WRITE;
200
201 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
202
203 return status;
204}
205
206static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
207{
208 umode_t mode = fh->fh_dentry->d_inode->i_mode;
209
210 if (S_ISREG(mode))
211 return nfs_ok;
212 if (S_ISDIR(mode))
213 return nfserr_isdir;
214
215
216
217
218
219
220
221 return nfserr_symlink;
222}
223
224static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
225{
226 if (nfsd4_has_session(cstate))
227 return;
228 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
229 &resfh->fh_handle);
230}
231
232static __be32
233do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
234{
235 struct svc_fh *current_fh = &cstate->current_fh;
236 struct svc_fh *resfh;
237 int accmode;
238 __be32 status;
239
240 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
241 if (!resfh)
242 return nfserr_jukebox;
243 fh_init(resfh, NFS4_FHSIZE);
244 open->op_truncate = 0;
245
246 if (open->op_create) {
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
267 open->op_fname.len, &open->op_iattr,
268 resfh, open->op_createmode,
269 (u32 *)open->op_verf.data,
270 &open->op_truncate, &open->op_created);
271
272 if (!status && open->op_label.len)
273 nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval);
274
275
276
277
278
279
280 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
281 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
282 FATTR4_WORD1_TIME_MODIFY);
283 } else {
284 status = nfsd_lookup(rqstp, current_fh,
285 open->op_fname.data, open->op_fname.len, resfh);
286 fh_unlock(current_fh);
287 }
288 if (status)
289 goto out;
290 status = nfsd_check_obj_isreg(resfh);
291 if (status)
292 goto out;
293
294 if (is_create_with_attrs(open) && open->op_acl != NULL)
295 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
296
297 nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
298 accmode = NFSD_MAY_NOP;
299 if (open->op_created ||
300 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
301 accmode |= NFSD_MAY_OWNER_OVERRIDE;
302 status = do_open_permission(rqstp, resfh, open, accmode);
303 set_change_info(&open->op_cinfo, current_fh);
304 fh_dup2(current_fh, resfh);
305out:
306 fh_put(resfh);
307 kfree(resfh);
308 return status;
309}
310
311static __be32
312do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
313{
314 struct svc_fh *current_fh = &cstate->current_fh;
315 __be32 status;
316 int accmode = 0;
317
318
319
320
321
322 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
323
324 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
325
326 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
327 (open->op_iattr.ia_size == 0);
328
329
330
331
332
333
334
335
336
337 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
338 accmode = NFSD_MAY_OWNER_OVERRIDE;
339
340 status = do_open_permission(rqstp, current_fh, open, accmode);
341
342 return status;
343}
344
345static void
346copy_clientid(clientid_t *clid, struct nfsd4_session *session)
347{
348 struct nfsd4_sessionid *sid =
349 (struct nfsd4_sessionid *)session->se_sessionid.data;
350
351 clid->cl_boot = sid->clientid.cl_boot;
352 clid->cl_id = sid->clientid.cl_id;
353}
354
355static __be32
356nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
357 struct nfsd4_open *open)
358{
359 __be32 status;
360 struct nfsd4_compoundres *resp;
361 struct net *net = SVC_NET(rqstp);
362 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
363
364 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
365 (int)open->op_fname.len, open->op_fname.data,
366 open->op_openowner);
367
368
369 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
370 return nfserr_inval;
371
372 open->op_created = 0;
373
374
375
376
377 if (nfsd4_has_session(cstate) &&
378 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
379 &cstate->session->se_client->cl_flags) &&
380 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
381 return nfserr_grace;
382
383 if (nfsd4_has_session(cstate))
384 copy_clientid(&open->op_clientid, cstate->session);
385
386 nfs4_lock_state();
387
388
389 resp = rqstp->rq_resp;
390 status = nfsd4_process_open1(&resp->cstate, open, nn);
391 if (status == nfserr_replay_me) {
392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
393 fh_put(&cstate->current_fh);
394 fh_copy_shallow(&cstate->current_fh.fh_handle,
395 &rp->rp_openfh);
396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
397 if (status)
398 dprintk("nfsd4_open: replay failed"
399 " restoring previous filehandle\n");
400 else
401 status = nfserr_replay_me;
402 }
403 if (status)
404 goto out;
405 if (open->op_xdr_error) {
406 status = open->op_xdr_error;
407 goto out;
408 }
409
410 status = nfsd4_check_open_attributes(rqstp, cstate, open);
411 if (status)
412 goto out;
413
414
415
416 status = nfserr_grace;
417 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
418 goto out;
419 status = nfserr_no_grace;
420 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
421 goto out;
422
423 switch (open->op_claim_type) {
424 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
425 case NFS4_OPEN_CLAIM_NULL:
426 status = do_open_lookup(rqstp, cstate, open);
427 if (status)
428 goto out;
429 break;
430 case NFS4_OPEN_CLAIM_PREVIOUS:
431 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
432 status = nfs4_check_open_reclaim(&open->op_clientid,
433 cstate->minorversion,
434 nn);
435 if (status)
436 goto out;
437 case NFS4_OPEN_CLAIM_FH:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
439 status = do_open_fhandle(rqstp, cstate, open);
440 if (status)
441 goto out;
442 break;
443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
444 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
445 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
446 dprintk("NFSD: unsupported OPEN claim type %d\n",
447 open->op_claim_type);
448 status = nfserr_notsupp;
449 goto out;
450 default:
451 dprintk("NFSD: Invalid OPEN claim type %d\n",
452 open->op_claim_type);
453 status = nfserr_inval;
454 goto out;
455 }
456
457
458
459
460
461 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
462 WARN_ON(status && open->op_created);
463out:
464 nfsd4_cleanup_open_state(open, status);
465 if (open->op_openowner && !nfsd4_has_session(cstate))
466 cstate->replay_owner = &open->op_openowner->oo_owner;
467 nfsd4_bump_seqid(cstate, status);
468 if (!cstate->replay_owner)
469 nfs4_unlock_state();
470 return status;
471}
472
473
474
475
476
477
478
479static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
480{
481 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
482
483 if (!seqid_mutating_err(ntohl(op->status)))
484 return op->status;
485 if (nfsd4_has_session(cstate))
486 return op->status;
487 open->op_xdr_error = op->status;
488 return nfsd4_open(rqstp, cstate, open);
489}
490
491
492
493
494static __be32
495nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
496 struct svc_fh **getfh)
497{
498 if (!cstate->current_fh.fh_dentry)
499 return nfserr_nofilehandle;
500
501 *getfh = &cstate->current_fh;
502 return nfs_ok;
503}
504
505static __be32
506nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
507 struct nfsd4_putfh *putfh)
508{
509 fh_put(&cstate->current_fh);
510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
512 putfh->pf_fhlen);
513 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
514}
515
516static __be32
517nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
518 void *arg)
519{
520 __be32 status;
521
522 fh_put(&cstate->current_fh);
523 status = exp_pseudoroot(rqstp, &cstate->current_fh);
524 return status;
525}
526
527static __be32
528nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 void *arg)
530{
531 if (!cstate->save_fh.fh_dentry)
532 return nfserr_restorefh;
533
534 fh_dup2(&cstate->current_fh, &cstate->save_fh);
535 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
536 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
537 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
538 }
539 return nfs_ok;
540}
541
542static __be32
543nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
544 void *arg)
545{
546 if (!cstate->current_fh.fh_dentry)
547 return nfserr_nofilehandle;
548
549 fh_dup2(&cstate->save_fh, &cstate->current_fh);
550 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
551 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
552 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
553 }
554 return nfs_ok;
555}
556
557
558
559
560static __be32
561nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
562 struct nfsd4_access *access)
563{
564 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
565 return nfserr_inval;
566
567 access->ac_resp_access = access->ac_req_access;
568 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
569 &access->ac_supported);
570}
571
572static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
573{
574 __be32 verf[2];
575 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
576
577 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
578 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
579 memcpy(verifier->data, verf, sizeof(verifier->data));
580}
581
582static __be32
583nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
584 struct nfsd4_commit *commit)
585{
586 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
587 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
588 commit->co_count);
589}
590
591static __be32
592nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
593 struct nfsd4_create *create)
594{
595 struct svc_fh resfh;
596 __be32 status;
597 dev_t rdev;
598
599 fh_init(&resfh, NFS4_FHSIZE);
600
601 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
602 NFSD_MAY_CREATE);
603 if (status)
604 return status;
605
606 status = check_attr_support(rqstp, cstate, create->cr_bmval,
607 nfsd_attrmask);
608 if (status)
609 return status;
610
611 switch (create->cr_type) {
612 case NF4LNK:
613
614
615
616
617
618
619
620 create->cr_linkname[create->cr_linklen] = 0;
621
622 status = nfsd_symlink(rqstp, &cstate->current_fh,
623 create->cr_name, create->cr_namelen,
624 create->cr_linkname, create->cr_linklen,
625 &resfh, &create->cr_iattr);
626 break;
627
628 case NF4BLK:
629 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
630 if (MAJOR(rdev) != create->cr_specdata1 ||
631 MINOR(rdev) != create->cr_specdata2)
632 return nfserr_inval;
633 status = nfsd_create(rqstp, &cstate->current_fh,
634 create->cr_name, create->cr_namelen,
635 &create->cr_iattr, S_IFBLK, rdev, &resfh);
636 break;
637
638 case NF4CHR:
639 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
640 if (MAJOR(rdev) != create->cr_specdata1 ||
641 MINOR(rdev) != create->cr_specdata2)
642 return nfserr_inval;
643 status = nfsd_create(rqstp, &cstate->current_fh,
644 create->cr_name, create->cr_namelen,
645 &create->cr_iattr,S_IFCHR, rdev, &resfh);
646 break;
647
648 case NF4SOCK:
649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr, S_IFSOCK, 0, &resfh);
652 break;
653
654 case NF4FIFO:
655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr, S_IFIFO, 0, &resfh);
658 break;
659
660 case NF4DIR:
661 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
662 status = nfsd_create(rqstp, &cstate->current_fh,
663 create->cr_name, create->cr_namelen,
664 &create->cr_iattr, S_IFDIR, 0, &resfh);
665 break;
666
667 default:
668 status = nfserr_badtype;
669 }
670
671 if (status)
672 goto out;
673
674 if (create->cr_label.len)
675 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
676
677 if (create->cr_acl != NULL)
678 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
679 create->cr_bmval);
680
681 fh_unlock(&cstate->current_fh);
682 set_change_info(&create->cr_cinfo, &cstate->current_fh);
683 fh_dup2(&cstate->current_fh, &resfh);
684out:
685 fh_put(&resfh);
686 return status;
687}
688
689static __be32
690nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
691 struct nfsd4_getattr *getattr)
692{
693 __be32 status;
694
695 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
696 if (status)
697 return status;
698
699 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
700 return nfserr_inval;
701
702 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
703 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
704 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
705
706 getattr->ga_fhp = &cstate->current_fh;
707 return nfs_ok;
708}
709
710static __be32
711nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
712 struct nfsd4_link *link)
713{
714 __be32 status = nfserr_nofilehandle;
715
716 if (!cstate->save_fh.fh_dentry)
717 return status;
718 status = nfsd_link(rqstp, &cstate->current_fh,
719 link->li_name, link->li_namelen, &cstate->save_fh);
720 if (!status)
721 set_change_info(&link->li_cinfo, &cstate->current_fh);
722 return status;
723}
724
725static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
726{
727 struct svc_fh tmp_fh;
728 __be32 ret;
729
730 fh_init(&tmp_fh, NFS4_FHSIZE);
731 ret = exp_pseudoroot(rqstp, &tmp_fh);
732 if (ret)
733 return ret;
734 if (tmp_fh.fh_dentry == fh->fh_dentry) {
735 fh_put(&tmp_fh);
736 return nfserr_noent;
737 }
738 fh_put(&tmp_fh);
739 return nfsd_lookup(rqstp, fh, "..", 2, fh);
740}
741
742static __be32
743nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
744 void *arg)
745{
746 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
747}
748
749static __be32
750nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
751 struct nfsd4_lookup *lookup)
752{
753 return nfsd_lookup(rqstp, &cstate->current_fh,
754 lookup->lo_name, lookup->lo_len,
755 &cstate->current_fh);
756}
757
758static __be32
759nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
760 struct nfsd4_read *read)
761{
762 __be32 status;
763
764
765
766 read->rd_filp = NULL;
767 if (read->rd_offset >= OFFSET_MAX)
768 return nfserr_inval;
769
770
771
772
773
774
775
776
777
778 if (!nfsd4_last_compound_op(rqstp))
779 rqstp->rq_splice_ok = false;
780
781 nfs4_lock_state();
782
783 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
784 cstate, &read->rd_stateid,
785 RD_STATE, &read->rd_filp))) {
786 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
787 goto out;
788 }
789 if (read->rd_filp)
790 get_file(read->rd_filp);
791 status = nfs_ok;
792out:
793 nfs4_unlock_state();
794 read->rd_rqstp = rqstp;
795 read->rd_fhp = &cstate->current_fh;
796 return status;
797}
798
799static __be32
800nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
801 struct nfsd4_readdir *readdir)
802{
803 u64 cookie = readdir->rd_cookie;
804 static const nfs4_verifier zeroverf;
805
806
807
808 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
809 return nfserr_inval;
810
811 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
812 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
813 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
814
815 if ((cookie == 1) || (cookie == 2) ||
816 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
817 return nfserr_bad_cookie;
818
819 readdir->rd_rqstp = rqstp;
820 readdir->rd_fhp = &cstate->current_fh;
821 return nfs_ok;
822}
823
824static __be32
825nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_readlink *readlink)
827{
828 readlink->rl_rqstp = rqstp;
829 readlink->rl_fhp = &cstate->current_fh;
830 return nfs_ok;
831}
832
833static __be32
834nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
835 struct nfsd4_remove *remove)
836{
837 __be32 status;
838
839 if (locks_in_grace(SVC_NET(rqstp)))
840 return nfserr_grace;
841 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
842 remove->rm_name, remove->rm_namelen);
843 if (!status) {
844 fh_unlock(&cstate->current_fh);
845 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
846 }
847 return status;
848}
849
850static __be32
851nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
852 struct nfsd4_rename *rename)
853{
854 __be32 status = nfserr_nofilehandle;
855
856 if (!cstate->save_fh.fh_dentry)
857 return status;
858 if (locks_in_grace(SVC_NET(rqstp)) &&
859 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
860 return nfserr_grace;
861 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
862 rename->rn_snamelen, &cstate->current_fh,
863 rename->rn_tname, rename->rn_tnamelen);
864 if (status)
865 return status;
866 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
867 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
868 return nfs_ok;
869}
870
871static __be32
872nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
873 struct nfsd4_secinfo *secinfo)
874{
875 struct svc_fh resfh;
876 struct svc_export *exp;
877 struct dentry *dentry;
878 __be32 err;
879
880 fh_init(&resfh, NFS4_FHSIZE);
881 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
882 if (err)
883 return err;
884 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
885 secinfo->si_name, secinfo->si_namelen,
886 &exp, &dentry);
887 if (err)
888 return err;
889 if (dentry->d_inode == NULL) {
890 exp_put(exp);
891 err = nfserr_noent;
892 } else
893 secinfo->si_exp = exp;
894 dput(dentry);
895 if (cstate->minorversion)
896
897 fh_put(&cstate->current_fh);
898 return err;
899}
900
901static __be32
902nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
903 struct nfsd4_secinfo_no_name *sin)
904{
905 __be32 err;
906
907 switch (sin->sin_style) {
908 case NFS4_SECINFO_STYLE4_CURRENT_FH:
909 break;
910 case NFS4_SECINFO_STYLE4_PARENT:
911 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
912 if (err)
913 return err;
914 break;
915 default:
916 return nfserr_inval;
917 }
918 exp_get(cstate->current_fh.fh_export);
919 sin->sin_exp = cstate->current_fh.fh_export;
920 fh_put(&cstate->current_fh);
921 return nfs_ok;
922}
923
924static __be32
925nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
926 struct nfsd4_setattr *setattr)
927{
928 __be32 status = nfs_ok;
929 int err;
930
931 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
932 nfs4_lock_state();
933 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
934 &setattr->sa_stateid, WR_STATE, NULL);
935 nfs4_unlock_state();
936 if (status) {
937 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
938 return status;
939 }
940 }
941 err = fh_want_write(&cstate->current_fh);
942 if (err)
943 return nfserrno(err);
944 status = nfs_ok;
945
946 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
947 nfsd_attrmask);
948 if (status)
949 goto out;
950
951 if (setattr->sa_acl != NULL)
952 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
953 setattr->sa_acl);
954 if (status)
955 goto out;
956 if (setattr->sa_label.len)
957 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
958 &setattr->sa_label);
959 if (status)
960 goto out;
961 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
962 0, (time_t)0);
963out:
964 fh_drop_write(&cstate->current_fh);
965 return status;
966}
967
968static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
969{
970 int i = 1;
971 int buflen = write->wr_buflen;
972
973 vec[0].iov_base = write->wr_head.iov_base;
974 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
975 buflen -= vec[0].iov_len;
976
977 while (buflen) {
978 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
979 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
980 buflen -= vec[i].iov_len;
981 i++;
982 }
983 return i;
984}
985
986static __be32
987nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
988 struct nfsd4_write *write)
989{
990 stateid_t *stateid = &write->wr_stateid;
991 struct file *filp = NULL;
992 __be32 status = nfs_ok;
993 unsigned long cnt;
994 int nvecs;
995
996
997
998 if (write->wr_offset >= OFFSET_MAX)
999 return nfserr_inval;
1000
1001 nfs4_lock_state();
1002 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
1003 cstate, stateid, WR_STATE, &filp);
1004 if (status) {
1005 nfs4_unlock_state();
1006 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1007 return status;
1008 }
1009 if (filp)
1010 get_file(filp);
1011 nfs4_unlock_state();
1012
1013 cnt = write->wr_buflen;
1014 write->wr_how_written = write->wr_stable_how;
1015 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1016
1017 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1018 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1019
1020 status = nfsd_write(rqstp, &cstate->current_fh, filp,
1021 write->wr_offset, rqstp->rq_vec, nvecs,
1022 &cnt, &write->wr_how_written);
1023 if (filp)
1024 fput(filp);
1025
1026 write->wr_bytes_written = cnt;
1027
1028 return status;
1029}
1030
1031
1032
1033
1034
1035
1036static __be32
1037_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1038 struct nfsd4_verify *verify)
1039{
1040 __be32 *buf, *p;
1041 int count;
1042 __be32 status;
1043
1044 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1045 if (status)
1046 return status;
1047
1048 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1049 if (status)
1050 return status;
1051
1052 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1053 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1054 return nfserr_inval;
1055 if (verify->ve_attrlen & 3)
1056 return nfserr_inval;
1057
1058
1059
1060
1061 count = 4 + (verify->ve_attrlen >> 2);
1062 buf = kmalloc(count << 2, GFP_KERNEL);
1063 if (!buf)
1064 return nfserr_jukebox;
1065
1066 p = buf;
1067 status = nfsd4_encode_fattr(&cstate->current_fh,
1068 cstate->current_fh.fh_export,
1069 cstate->current_fh.fh_dentry, &p,
1070 count, verify->ve_bmval,
1071 rqstp, 0);
1072
1073
1074 if (status == nfserr_resource)
1075 status = nfserr_not_same;
1076 if (status)
1077 goto out_kfree;
1078
1079
1080 p = buf + 1 + ntohl(buf[0]);
1081 status = nfserr_not_same;
1082 if (ntohl(*p++) != verify->ve_attrlen)
1083 goto out_kfree;
1084 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1085 status = nfserr_same;
1086
1087out_kfree:
1088 kfree(buf);
1089 return status;
1090}
1091
1092static __be32
1093nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1094 struct nfsd4_verify *verify)
1095{
1096 __be32 status;
1097
1098 status = _nfsd4_verify(rqstp, cstate, verify);
1099 return status == nfserr_not_same ? nfs_ok : status;
1100}
1101
1102static __be32
1103nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1104 struct nfsd4_verify *verify)
1105{
1106 __be32 status;
1107
1108 status = _nfsd4_verify(rqstp, cstate, verify);
1109 return status == nfserr_same ? nfs_ok : status;
1110}
1111
1112
1113
1114
1115static __be32
1116nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1117{
1118 return nfs_ok;
1119}
1120
1121static inline void nfsd4_increment_op_stats(u32 opnum)
1122{
1123 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1124 nfsdstats.nfs4_opcount[opnum]++;
1125}
1126
1127typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1128 void *);
1129typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1130typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1131typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1132
1133enum nfsd4_op_flags {
1134 ALLOWED_WITHOUT_FH = 1 << 0,
1135 ALLOWED_ON_ABSENT_FS = 1 << 1,
1136 ALLOWED_AS_FIRST_OP = 1 << 2,
1137
1138 OP_HANDLES_WRONGSEC = 1 << 3,
1139 OP_IS_PUTFH_LIKE = 1 << 4,
1140
1141
1142
1143
1144
1145
1146 OP_MODIFIES_SOMETHING = 1 << 5,
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156 OP_CACHEME = 1 << 6,
1157
1158
1159
1160 OP_CLEAR_STATEID = 1 << 7,
1161};
1162
1163struct nfsd4_operation {
1164 nfsd4op_func op_func;
1165 u32 op_flags;
1166 char *op_name;
1167
1168 nfsd4op_rsize op_rsize_bop;
1169 stateid_getter op_get_currentstateid;
1170 stateid_setter op_set_currentstateid;
1171};
1172
1173static struct nfsd4_operation nfsd4_ops[];
1174
1175#ifdef NFSD_DEBUG
1176static const char *nfsd4_op_name(unsigned opnum);
1177#endif
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1192{
1193 struct nfsd4_op *op = &args->ops[0];
1194
1195
1196 if (args->minorversion == 0)
1197 return nfs_ok;
1198
1199 if (args->opcnt == 0)
1200 return nfs_ok;
1201 if (op->status == nfserr_op_illegal)
1202 return nfs_ok;
1203 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1204 return nfserr_op_not_in_session;
1205 if (op->opnum == OP_SEQUENCE)
1206 return nfs_ok;
1207 if (args->opcnt != 1)
1208 return nfserr_not_only_op;
1209 return nfs_ok;
1210}
1211
1212static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1213{
1214 return &nfsd4_ops[op->opnum];
1215}
1216
1217bool nfsd4_cache_this_op(struct nfsd4_op *op)
1218{
1219 return OPDESC(op)->op_flags & OP_CACHEME;
1220}
1221
1222static bool need_wrongsec_check(struct svc_rqst *rqstp)
1223{
1224 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1225 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1226 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1227 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1228 struct nfsd4_operation *thisd;
1229 struct nfsd4_operation *nextd;
1230
1231 thisd = OPDESC(this);
1232
1233
1234
1235
1236 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1237 return false;
1238
1239
1240
1241
1242
1243 if (argp->opcnt == resp->opcnt)
1244 return false;
1245
1246 nextd = OPDESC(next);
1247
1248
1249
1250
1251
1252 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1253}
1254
1255
1256
1257
1258static __be32
1259nfsd4_proc_compound(struct svc_rqst *rqstp,
1260 struct nfsd4_compoundargs *args,
1261 struct nfsd4_compoundres *resp)
1262{
1263 struct nfsd4_op *op;
1264 struct nfsd4_operation *opdesc;
1265 struct nfsd4_compound_state *cstate = &resp->cstate;
1266 int slack_bytes;
1267 u32 plen = 0;
1268 __be32 status;
1269
1270 resp->xbuf = &rqstp->rq_res;
1271 resp->p = rqstp->rq_res.head[0].iov_base +
1272 rqstp->rq_res.head[0].iov_len;
1273 resp->tagp = resp->p;
1274
1275 resp->p += 2 + XDR_QUADLEN(args->taglen);
1276 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1277 resp->taglen = args->taglen;
1278 resp->tag = args->tag;
1279 resp->opcnt = 0;
1280 resp->rqstp = rqstp;
1281 resp->cstate.minorversion = args->minorversion;
1282 resp->cstate.replay_owner = NULL;
1283 resp->cstate.session = NULL;
1284 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1285 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1286
1287
1288
1289
1290 rqstp->rq_usedeferral = 0;
1291
1292
1293
1294
1295 status = nfserr_minor_vers_mismatch;
1296 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1297 goto out;
1298
1299 status = nfs41_check_op_ordering(args);
1300 if (status) {
1301 op = &args->ops[0];
1302 op->status = status;
1303 goto encode_op;
1304 }
1305
1306 while (!status && resp->opcnt < args->opcnt) {
1307 op = &args->ops[resp->opcnt++];
1308
1309 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1310 resp->opcnt, args->opcnt, op->opnum,
1311 nfsd4_op_name(op->opnum));
1312
1313
1314
1315
1316
1317 if (op->status) {
1318 if (op->opnum == OP_OPEN)
1319 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1320 goto encode_op;
1321 }
1322
1323
1324
1325
1326
1327
1328 slack_bytes = (char *)resp->end - (char *)resp->p;
1329 if (slack_bytes < COMPOUND_SLACK_SPACE
1330 + COMPOUND_ERR_SLACK_SPACE) {
1331 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1332 op->status = nfserr_resource;
1333 goto encode_op;
1334 }
1335
1336 opdesc = OPDESC(op);
1337
1338 if (!cstate->current_fh.fh_dentry) {
1339 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1340 op->status = nfserr_nofilehandle;
1341 goto encode_op;
1342 }
1343 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1344 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1345 op->status = nfserr_moved;
1346 goto encode_op;
1347 }
1348
1349
1350 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1351 plen = opdesc->op_rsize_bop(rqstp, op);
1352 op->status = nfsd4_check_resp_size(resp, plen);
1353 }
1354
1355 if (op->status)
1356 goto encode_op;
1357
1358 if (opdesc->op_get_currentstateid)
1359 opdesc->op_get_currentstateid(cstate, &op->u);
1360 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1361
1362 if (!op->status) {
1363 if (opdesc->op_set_currentstateid)
1364 opdesc->op_set_currentstateid(cstate, &op->u);
1365
1366 if (opdesc->op_flags & OP_CLEAR_STATEID)
1367 clear_current_stateid(cstate);
1368
1369 if (need_wrongsec_check(rqstp))
1370 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1371 }
1372
1373encode_op:
1374
1375 if (resp->cstate.status == nfserr_replay_cache) {
1376 dprintk("%s NFS4.1 replay from cache\n", __func__);
1377 status = op->status;
1378 goto out;
1379 }
1380 if (op->status == nfserr_replay_me) {
1381 op->replay = &cstate->replay_owner->so_replay;
1382 nfsd4_encode_replay(resp, op);
1383 status = op->status = op->replay->rp_status;
1384 } else {
1385 nfsd4_encode_operation(resp, op);
1386 status = op->status;
1387 }
1388
1389 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1390 args->ops, args->opcnt, resp->opcnt, op->opnum,
1391 be32_to_cpu(status));
1392
1393 if (cstate->replay_owner) {
1394 nfs4_unlock_state();
1395 cstate->replay_owner = NULL;
1396 }
1397
1398 if (op->opnum == OP_READ && op->u.read.rd_filp)
1399 fput(op->u.read.rd_filp);
1400
1401 nfsd4_increment_op_stats(op->opnum);
1402 }
1403
1404 resp->cstate.status = status;
1405 fh_put(&resp->cstate.current_fh);
1406 fh_put(&resp->cstate.save_fh);
1407 BUG_ON(resp->cstate.replay_owner);
1408out:
1409
1410 rqstp->rq_usedeferral = 1;
1411 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1412 return status;
1413}
1414
1415#define op_encode_hdr_size (2)
1416#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1417#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1418#define op_encode_change_info_maxsz (5)
1419#define nfs4_fattr_bitmap_maxsz (4)
1420
1421#define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1422#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1423
1424#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1425
1426#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1427#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1428 op_encode_ace_maxsz)
1429
1430#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1431
1432static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1433{
1434 return (op_encode_hdr_size) * sizeof(__be32);
1435}
1436
1437static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1438{
1439 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1440}
1441
1442static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1443{
1444 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1445}
1446
1447static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1448{
1449 return (op_encode_hdr_size + op_encode_change_info_maxsz
1450 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1451}
1452
1453static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1454{
1455 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1456 * sizeof(__be32);
1457}
1458
1459static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1460{
1461 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1462 * sizeof(__be32);
1463}
1464
1465static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1466{
1467 return (op_encode_hdr_size + op_encode_stateid_maxsz
1468 + op_encode_change_info_maxsz + 1
1469 + nfs4_fattr_bitmap_maxsz
1470 + op_encode_delegation_maxsz) * sizeof(__be32);
1471}
1472
1473static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1474{
1475 u32 maxcount = 0, rlen = 0;
1476
1477 maxcount = svc_max_payload(rqstp);
1478 rlen = op->u.read.rd_length;
1479
1480 if (rlen > maxcount)
1481 rlen = maxcount;
1482
1483 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1484}
1485
1486static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1487{
1488 u32 rlen = op->u.readdir.rd_maxcount;
1489
1490 if (rlen > PAGE_SIZE)
1491 rlen = PAGE_SIZE;
1492
1493 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1494 * sizeof(__be32) + rlen;
1495}
1496
1497static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1498{
1499 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1500 * sizeof(__be32);
1501}
1502
1503static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1504{
1505 return (op_encode_hdr_size + op_encode_change_info_maxsz
1506 + op_encode_change_info_maxsz) * sizeof(__be32);
1507}
1508
1509static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1510{
1511 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1512}
1513
1514static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1515{
1516 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1517}
1518
1519static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1520{
1521 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1522}
1523
1524static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1525{
1526 return (op_encode_hdr_size + 2 + 1 + \
1527 1 + 1 + 2 + \
1528 2 + \
1529 \
1530 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1531 \
1532 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1533 1 + \
1534 0 ) * sizeof(__be32);
1535}
1536
1537static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1538{
1539 return (op_encode_hdr_size + \
1540 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1541 2 ) * sizeof(__be32);
1542}
1543
1544static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1545{
1546 return (op_encode_hdr_size + \
1547 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1548 2 + \
1549 op_encode_channel_attrs_maxsz + \
1550 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1551}
1552
1553static struct nfsd4_operation nfsd4_ops[] = {
1554 [OP_ACCESS] = {
1555 .op_func = (nfsd4op_func)nfsd4_access,
1556 .op_name = "OP_ACCESS",
1557 },
1558 [OP_CLOSE] = {
1559 .op_func = (nfsd4op_func)nfsd4_close,
1560 .op_flags = OP_MODIFIES_SOMETHING,
1561 .op_name = "OP_CLOSE",
1562 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1563 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1564 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1565 },
1566 [OP_COMMIT] = {
1567 .op_func = (nfsd4op_func)nfsd4_commit,
1568 .op_flags = OP_MODIFIES_SOMETHING,
1569 .op_name = "OP_COMMIT",
1570 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1571 },
1572 [OP_CREATE] = {
1573 .op_func = (nfsd4op_func)nfsd4_create,
1574 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1575 .op_name = "OP_CREATE",
1576 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1577 },
1578 [OP_DELEGRETURN] = {
1579 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1580 .op_flags = OP_MODIFIES_SOMETHING,
1581 .op_name = "OP_DELEGRETURN",
1582 .op_rsize_bop = nfsd4_only_status_rsize,
1583 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1584 },
1585 [OP_GETATTR] = {
1586 .op_func = (nfsd4op_func)nfsd4_getattr,
1587 .op_flags = ALLOWED_ON_ABSENT_FS,
1588 .op_name = "OP_GETATTR",
1589 },
1590 [OP_GETFH] = {
1591 .op_func = (nfsd4op_func)nfsd4_getfh,
1592 .op_name = "OP_GETFH",
1593 },
1594 [OP_LINK] = {
1595 .op_func = (nfsd4op_func)nfsd4_link,
1596 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1597 | OP_CACHEME,
1598 .op_name = "OP_LINK",
1599 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1600 },
1601 [OP_LOCK] = {
1602 .op_func = (nfsd4op_func)nfsd4_lock,
1603 .op_flags = OP_MODIFIES_SOMETHING,
1604 .op_name = "OP_LOCK",
1605 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1606 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1607 },
1608 [OP_LOCKT] = {
1609 .op_func = (nfsd4op_func)nfsd4_lockt,
1610 .op_name = "OP_LOCKT",
1611 },
1612 [OP_LOCKU] = {
1613 .op_func = (nfsd4op_func)nfsd4_locku,
1614 .op_flags = OP_MODIFIES_SOMETHING,
1615 .op_name = "OP_LOCKU",
1616 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1617 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1618 },
1619 [OP_LOOKUP] = {
1620 .op_func = (nfsd4op_func)nfsd4_lookup,
1621 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1622 .op_name = "OP_LOOKUP",
1623 },
1624 [OP_LOOKUPP] = {
1625 .op_func = (nfsd4op_func)nfsd4_lookupp,
1626 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1627 .op_name = "OP_LOOKUPP",
1628 },
1629 [OP_NVERIFY] = {
1630 .op_func = (nfsd4op_func)nfsd4_nverify,
1631 .op_name = "OP_NVERIFY",
1632 },
1633 [OP_OPEN] = {
1634 .op_func = (nfsd4op_func)nfsd4_open,
1635 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1636 .op_name = "OP_OPEN",
1637 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1638 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1639 },
1640 [OP_OPEN_CONFIRM] = {
1641 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1642 .op_flags = OP_MODIFIES_SOMETHING,
1643 .op_name = "OP_OPEN_CONFIRM",
1644 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1645 },
1646 [OP_OPEN_DOWNGRADE] = {
1647 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1648 .op_flags = OP_MODIFIES_SOMETHING,
1649 .op_name = "OP_OPEN_DOWNGRADE",
1650 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1651 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1652 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1653 },
1654 [OP_PUTFH] = {
1655 .op_func = (nfsd4op_func)nfsd4_putfh,
1656 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1657 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1658 | OP_CLEAR_STATEID,
1659 .op_name = "OP_PUTFH",
1660 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1661 },
1662 [OP_PUTPUBFH] = {
1663 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1664 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1665 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1666 | OP_CLEAR_STATEID,
1667 .op_name = "OP_PUTPUBFH",
1668 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1669 },
1670 [OP_PUTROOTFH] = {
1671 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1672 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1673 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1674 | OP_CLEAR_STATEID,
1675 .op_name = "OP_PUTROOTFH",
1676 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1677 },
1678 [OP_READ] = {
1679 .op_func = (nfsd4op_func)nfsd4_read,
1680 .op_flags = OP_MODIFIES_SOMETHING,
1681 .op_name = "OP_READ",
1682 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1683 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1684 },
1685 [OP_READDIR] = {
1686 .op_func = (nfsd4op_func)nfsd4_readdir,
1687 .op_flags = OP_MODIFIES_SOMETHING,
1688 .op_name = "OP_READDIR",
1689 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1690 },
1691 [OP_READLINK] = {
1692 .op_func = (nfsd4op_func)nfsd4_readlink,
1693 .op_name = "OP_READLINK",
1694 },
1695 [OP_REMOVE] = {
1696 .op_func = (nfsd4op_func)nfsd4_remove,
1697 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1698 .op_name = "OP_REMOVE",
1699 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1700 },
1701 [OP_RENAME] = {
1702 .op_func = (nfsd4op_func)nfsd4_rename,
1703 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1704 .op_name = "OP_RENAME",
1705 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1706 },
1707 [OP_RENEW] = {
1708 .op_func = (nfsd4op_func)nfsd4_renew,
1709 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1710 | OP_MODIFIES_SOMETHING,
1711 .op_name = "OP_RENEW",
1712 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1713
1714 },
1715 [OP_RESTOREFH] = {
1716 .op_func = (nfsd4op_func)nfsd4_restorefh,
1717 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1718 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1719 .op_name = "OP_RESTOREFH",
1720 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1721 },
1722 [OP_SAVEFH] = {
1723 .op_func = (nfsd4op_func)nfsd4_savefh,
1724 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1725 .op_name = "OP_SAVEFH",
1726 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1727 },
1728 [OP_SECINFO] = {
1729 .op_func = (nfsd4op_func)nfsd4_secinfo,
1730 .op_flags = OP_HANDLES_WRONGSEC,
1731 .op_name = "OP_SECINFO",
1732 },
1733 [OP_SETATTR] = {
1734 .op_func = (nfsd4op_func)nfsd4_setattr,
1735 .op_name = "OP_SETATTR",
1736 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1737 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1738 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1739 },
1740 [OP_SETCLIENTID] = {
1741 .op_func = (nfsd4op_func)nfsd4_setclientid,
1742 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1743 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1744 .op_name = "OP_SETCLIENTID",
1745 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1746 },
1747 [OP_SETCLIENTID_CONFIRM] = {
1748 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1749 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1750 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1751 .op_name = "OP_SETCLIENTID_CONFIRM",
1752 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1753 },
1754 [OP_VERIFY] = {
1755 .op_func = (nfsd4op_func)nfsd4_verify,
1756 .op_name = "OP_VERIFY",
1757 },
1758 [OP_WRITE] = {
1759 .op_func = (nfsd4op_func)nfsd4_write,
1760 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1761 .op_name = "OP_WRITE",
1762 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1763 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1764 },
1765 [OP_RELEASE_LOCKOWNER] = {
1766 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1767 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1768 | OP_MODIFIES_SOMETHING,
1769 .op_name = "OP_RELEASE_LOCKOWNER",
1770 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1771 },
1772
1773
1774 [OP_EXCHANGE_ID] = {
1775 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1776 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1777 | OP_MODIFIES_SOMETHING,
1778 .op_name = "OP_EXCHANGE_ID",
1779 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1780 },
1781 [OP_BACKCHANNEL_CTL] = {
1782 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1783 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1784 .op_name = "OP_BACKCHANNEL_CTL",
1785 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1786 },
1787 [OP_BIND_CONN_TO_SESSION] = {
1788 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1789 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1790 | OP_MODIFIES_SOMETHING,
1791 .op_name = "OP_BIND_CONN_TO_SESSION",
1792 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1793 },
1794 [OP_CREATE_SESSION] = {
1795 .op_func = (nfsd4op_func)nfsd4_create_session,
1796 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1797 | OP_MODIFIES_SOMETHING,
1798 .op_name = "OP_CREATE_SESSION",
1799 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1800 },
1801 [OP_DESTROY_SESSION] = {
1802 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1803 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1804 | OP_MODIFIES_SOMETHING,
1805 .op_name = "OP_DESTROY_SESSION",
1806 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1807 },
1808 [OP_SEQUENCE] = {
1809 .op_func = (nfsd4op_func)nfsd4_sequence,
1810 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1811 .op_name = "OP_SEQUENCE",
1812 },
1813 [OP_DESTROY_CLIENTID] = {
1814 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1815 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1816 | OP_MODIFIES_SOMETHING,
1817 .op_name = "OP_DESTROY_CLIENTID",
1818 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1819 },
1820 [OP_RECLAIM_COMPLETE] = {
1821 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1822 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1823 .op_name = "OP_RECLAIM_COMPLETE",
1824 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1825 },
1826 [OP_SECINFO_NO_NAME] = {
1827 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1828 .op_flags = OP_HANDLES_WRONGSEC,
1829 .op_name = "OP_SECINFO_NO_NAME",
1830 },
1831 [OP_TEST_STATEID] = {
1832 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1833 .op_flags = ALLOWED_WITHOUT_FH,
1834 .op_name = "OP_TEST_STATEID",
1835 },
1836 [OP_FREE_STATEID] = {
1837 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1838 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1839 .op_name = "OP_FREE_STATEID",
1840 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1841 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1842 },
1843};
1844
1845#ifdef NFSD_DEBUG
1846static const char *nfsd4_op_name(unsigned opnum)
1847{
1848 if (opnum < ARRAY_SIZE(nfsd4_ops))
1849 return nfsd4_ops[opnum].op_name;
1850 return "unknown_operation";
1851}
1852#endif
1853
1854#define nfsd4_voidres nfsd4_voidargs
1855struct nfsd4_voidargs { int dummy; };
1856
1857static struct svc_procedure nfsd_procedures4[2] = {
1858 [NFSPROC4_NULL] = {
1859 .pc_func = (svc_procfunc) nfsd4_proc_null,
1860 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1861 .pc_argsize = sizeof(struct nfsd4_voidargs),
1862 .pc_ressize = sizeof(struct nfsd4_voidres),
1863 .pc_cachetype = RC_NOCACHE,
1864 .pc_xdrressize = 1,
1865 },
1866 [NFSPROC4_COMPOUND] = {
1867 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1868 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1869 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1870 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1871 .pc_ressize = sizeof(struct nfsd4_compoundres),
1872 .pc_release = nfsd4_release_compoundargs,
1873 .pc_cachetype = RC_NOCACHE,
1874 .pc_xdrressize = NFSD_BUFSIZE/4,
1875 },
1876};
1877
1878struct svc_version nfsd_version4 = {
1879 .vs_vers = 4,
1880 .vs_nproc = 2,
1881 .vs_proc = nfsd_procedures4,
1882 .vs_dispatch = nfsd_dispatch,
1883 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1884};
1885
1886
1887
1888
1889
1890
1891