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35#include <linux/fs_struct.h>
36#include <linux/file.h>
37#include <linux/falloc.h>
38#include <linux/slab.h>
39#include <linux/kthread.h>
40
41#include "idmap.h"
42#include "cache.h"
43#include "xdr4.h"
44#include "vfs.h"
45#include "current_stateid.h"
46#include "netns.h"
47#include "acl.h"
48#include "pnfs.h"
49#include "trace.h"
50
51#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52#include <linux/security.h>
53
54static inline void
55nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
56{
57 struct inode *inode = d_inode(resfh->fh_dentry);
58 int status;
59
60 inode_lock(inode);
61 status = security_inode_setsecctx(resfh->fh_dentry,
62 label->data, label->len);
63 inode_unlock(inode);
64
65 if (status)
66
67
68
69
70
71 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
72
73 return;
74}
75#else
76static inline void
77nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
78{ }
79#endif
80
81#define NFSDDBG_FACILITY NFSDDBG_PROC
82
83static u32 nfsd_attrmask[] = {
84 NFSD_WRITEABLE_ATTRS_WORD0,
85 NFSD_WRITEABLE_ATTRS_WORD1,
86 NFSD_WRITEABLE_ATTRS_WORD2
87};
88
89static u32 nfsd41_ex_attrmask[] = {
90 NFSD_SUPPATTR_EXCLCREAT_WORD0,
91 NFSD_SUPPATTR_EXCLCREAT_WORD1,
92 NFSD_SUPPATTR_EXCLCREAT_WORD2
93};
94
95static __be32
96check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
97 u32 *bmval, u32 *writable)
98{
99 struct dentry *dentry = cstate->current_fh.fh_dentry;
100 struct svc_export *exp = cstate->current_fh.fh_export;
101
102 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
103 return nfserr_attrnotsupp;
104 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
105 return nfserr_attrnotsupp;
106 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
107 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
108 return nfserr_attrnotsupp;
109 if (writable && !bmval_is_subset(bmval, writable))
110 return nfserr_inval;
111 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
112 (bmval[1] & FATTR4_WORD1_MODE))
113 return nfserr_inval;
114 return nfs_ok;
115}
116
117static __be32
118nfsd4_check_open_attributes(struct svc_rqst *rqstp,
119 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
120{
121 __be32 status = nfs_ok;
122
123 if (open->op_create == NFS4_OPEN_CREATE) {
124 if (open->op_createmode == NFS4_CREATE_UNCHECKED
125 || open->op_createmode == NFS4_CREATE_GUARDED)
126 status = check_attr_support(rqstp, cstate,
127 open->op_bmval, nfsd_attrmask);
128 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
129 status = check_attr_support(rqstp, cstate,
130 open->op_bmval, nfsd41_ex_attrmask);
131 }
132
133 return status;
134}
135
136static int
137is_create_with_attrs(struct nfsd4_open *open)
138{
139 return open->op_create == NFS4_OPEN_CREATE
140 && (open->op_createmode == NFS4_CREATE_UNCHECKED
141 || open->op_createmode == NFS4_CREATE_GUARDED
142 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
143}
144
145
146
147
148
149static void
150do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
151 struct nfs4_acl *acl, u32 *bmval)
152{
153 __be32 status;
154
155 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
156 if (status)
157
158
159
160
161
162 bmval[0] &= ~FATTR4_WORD0_ACL;
163}
164
165static inline void
166fh_dup2(struct svc_fh *dst, struct svc_fh *src)
167{
168 fh_put(dst);
169 dget(src->fh_dentry);
170 if (src->fh_export)
171 exp_get(src->fh_export);
172 *dst = *src;
173}
174
175static __be32
176do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
177{
178 __be32 status;
179
180 if (open->op_truncate &&
181 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
182 return nfserr_inval;
183
184 accmode |= NFSD_MAY_READ_IF_EXEC;
185
186 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
187 accmode |= NFSD_MAY_READ;
188 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
189 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
190 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
191 accmode |= NFSD_MAY_WRITE;
192
193 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
194
195 return status;
196}
197
198static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
199{
200 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
201
202 if (S_ISREG(mode))
203 return nfs_ok;
204 if (S_ISDIR(mode))
205 return nfserr_isdir;
206
207
208
209
210
211
212
213 return nfserr_symlink;
214}
215
216static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
217{
218 if (nfsd4_has_session(cstate))
219 return;
220 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
221 &resfh->fh_handle);
222}
223
224static __be32
225do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
226{
227 struct svc_fh *current_fh = &cstate->current_fh;
228 int accmode;
229 __be32 status;
230
231 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
232 if (!*resfh)
233 return nfserr_jukebox;
234 fh_init(*resfh, NFS4_FHSIZE);
235 open->op_truncate = 0;
236
237 if (open->op_create) {
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257 current->fs->umask = open->op_umask;
258 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
259 open->op_fname.len, &open->op_iattr,
260 *resfh, open->op_createmode,
261 (u32 *)open->op_verf.data,
262 &open->op_truncate, &open->op_created);
263 current->fs->umask = 0;
264
265 if (!status && open->op_label.len)
266 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
267
268
269
270
271
272
273 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
274 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
275 FATTR4_WORD1_TIME_MODIFY);
276 } else
277
278
279
280
281
282
283 status = nfsd_lookup(rqstp, current_fh,
284 open->op_fname.data, open->op_fname.len, *resfh);
285 if (status)
286 goto out;
287 status = nfsd_check_obj_isreg(*resfh);
288 if (status)
289 goto out;
290
291 if (is_create_with_attrs(open) && open->op_acl != NULL)
292 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
293
294 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
295 accmode = NFSD_MAY_NOP;
296 if (open->op_created ||
297 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
298 accmode |= NFSD_MAY_OWNER_OVERRIDE;
299 status = do_open_permission(rqstp, *resfh, open, accmode);
300 set_change_info(&open->op_cinfo, current_fh);
301out:
302 return status;
303}
304
305static __be32
306do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
307{
308 struct svc_fh *current_fh = &cstate->current_fh;
309 __be32 status;
310 int accmode = 0;
311
312
313
314
315
316 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
317
318 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
319
320 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
321 (open->op_iattr.ia_size == 0);
322
323
324
325
326
327
328
329
330
331 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
332 accmode = NFSD_MAY_OWNER_OVERRIDE;
333
334 status = do_open_permission(rqstp, current_fh, open, accmode);
335
336 return status;
337}
338
339static void
340copy_clientid(clientid_t *clid, struct nfsd4_session *session)
341{
342 struct nfsd4_sessionid *sid =
343 (struct nfsd4_sessionid *)session->se_sessionid.data;
344
345 clid->cl_boot = sid->clientid.cl_boot;
346 clid->cl_id = sid->clientid.cl_id;
347}
348
349static __be32
350nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
351 union nfsd4_op_u *u)
352{
353 struct nfsd4_open *open = &u->open;
354 __be32 status;
355 struct svc_fh *resfh = NULL;
356 struct net *net = SVC_NET(rqstp);
357 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
358 bool reclaim = false;
359
360 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
361 (int)open->op_fname.len, open->op_fname.data,
362 open->op_openowner);
363
364
365 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
366 return nfserr_inval;
367
368 open->op_created = 0;
369
370
371
372
373 if (nfsd4_has_session(cstate) &&
374 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
375 &cstate->session->se_client->cl_flags) &&
376 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
377 return nfserr_grace;
378
379 if (nfsd4_has_session(cstate))
380 copy_clientid(&open->op_clientid, cstate->session);
381
382
383 status = nfsd4_process_open1(cstate, open, nn);
384 if (status == nfserr_replay_me) {
385 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
386 fh_put(&cstate->current_fh);
387 fh_copy_shallow(&cstate->current_fh.fh_handle,
388 &rp->rp_openfh);
389 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
390 if (status)
391 dprintk("nfsd4_open: replay failed"
392 " restoring previous filehandle\n");
393 else
394 status = nfserr_replay_me;
395 }
396 if (status)
397 goto out;
398 if (open->op_xdr_error) {
399 status = open->op_xdr_error;
400 goto out;
401 }
402
403 status = nfsd4_check_open_attributes(rqstp, cstate, open);
404 if (status)
405 goto out;
406
407
408
409 status = nfserr_grace;
410 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
411 goto out;
412 status = nfserr_no_grace;
413 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
414 goto out;
415
416 switch (open->op_claim_type) {
417 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
418 case NFS4_OPEN_CLAIM_NULL:
419 status = do_open_lookup(rqstp, cstate, open, &resfh);
420 if (status)
421 goto out;
422 break;
423 case NFS4_OPEN_CLAIM_PREVIOUS:
424 status = nfs4_check_open_reclaim(&open->op_clientid,
425 cstate, nn);
426 if (status)
427 goto out;
428 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
429 reclaim = true;
430
431 case NFS4_OPEN_CLAIM_FH:
432 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
433 status = do_open_fhandle(rqstp, cstate, open);
434 if (status)
435 goto out;
436 resfh = &cstate->current_fh;
437 break;
438 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
439 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
440 dprintk("NFSD: unsupported OPEN claim type %d\n",
441 open->op_claim_type);
442 status = nfserr_notsupp;
443 goto out;
444 default:
445 dprintk("NFSD: Invalid OPEN claim type %d\n",
446 open->op_claim_type);
447 status = nfserr_inval;
448 goto out;
449 }
450
451
452
453
454
455 status = nfsd4_process_open2(rqstp, resfh, open);
456 WARN(status && open->op_created,
457 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
458 be32_to_cpu(status));
459 if (reclaim && !status)
460 nn->somebody_reclaimed = true;
461out:
462 if (resfh && resfh != &cstate->current_fh) {
463 fh_dup2(&cstate->current_fh, resfh);
464 fh_put(resfh);
465 kfree(resfh);
466 }
467 nfsd4_cleanup_open_state(cstate, open);
468 nfsd4_bump_seqid(cstate, status);
469 return status;
470}
471
472
473
474
475
476
477
478static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
479{
480 struct nfsd4_open *open = &op->u.open;
481
482 if (!seqid_mutating_err(ntohl(op->status)))
483 return op->status;
484 if (nfsd4_has_session(cstate))
485 return op->status;
486 open->op_xdr_error = op->status;
487 return nfsd4_open(rqstp, cstate, &op->u);
488}
489
490
491
492
493static __be32
494nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
495 union nfsd4_op_u *u)
496{
497 u->getfh = &cstate->current_fh;
498 return nfs_ok;
499}
500
501static __be32
502nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 union nfsd4_op_u *u)
504{
505 struct nfsd4_putfh *putfh = &u->putfh;
506
507 fh_put(&cstate->current_fh);
508 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
509 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
510 putfh->pf_fhlen);
511 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
512}
513
514static __be32
515nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
516 union nfsd4_op_u *u)
517{
518 __be32 status;
519
520 fh_put(&cstate->current_fh);
521 status = exp_pseudoroot(rqstp, &cstate->current_fh);
522 return status;
523}
524
525static __be32
526nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
527 union nfsd4_op_u *u)
528{
529 if (!cstate->save_fh.fh_dentry)
530 return nfserr_restorefh;
531
532 fh_dup2(&cstate->current_fh, &cstate->save_fh);
533 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
534 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
535 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
536 }
537 return nfs_ok;
538}
539
540static __be32
541nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
542 union nfsd4_op_u *u)
543{
544 fh_dup2(&cstate->save_fh, &cstate->current_fh);
545 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
546 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
547 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
548 }
549 return nfs_ok;
550}
551
552
553
554
555static __be32
556nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
557 union nfsd4_op_u *u)
558{
559 struct nfsd4_access *access = &u->access;
560
561 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
562 return nfserr_inval;
563
564 access->ac_resp_access = access->ac_req_access;
565 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
566 &access->ac_supported);
567}
568
569static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
570{
571 __be32 verf[2];
572 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
573
574
575
576
577
578
579 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
580 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec;
581 memcpy(verifier->data, verf, sizeof(verifier->data));
582}
583
584static __be32
585nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
586 union nfsd4_op_u *u)
587{
588 struct nfsd4_commit *commit = &u->commit;
589
590 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
591 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
592 commit->co_count);
593}
594
595static __be32
596nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
597 union nfsd4_op_u *u)
598{
599 struct nfsd4_create *create = &u->create;
600 struct svc_fh resfh;
601 __be32 status;
602 dev_t rdev;
603
604 fh_init(&resfh, NFS4_FHSIZE);
605
606 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
607 if (status)
608 return status;
609
610 status = check_attr_support(rqstp, cstate, create->cr_bmval,
611 nfsd_attrmask);
612 if (status)
613 return status;
614
615 current->fs->umask = create->cr_umask;
616 switch (create->cr_type) {
617 case NF4LNK:
618 status = nfsd_symlink(rqstp, &cstate->current_fh,
619 create->cr_name, create->cr_namelen,
620 create->cr_data, &resfh);
621 break;
622
623 case NF4BLK:
624 status = nfserr_inval;
625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
626 if (MAJOR(rdev) != create->cr_specdata1 ||
627 MINOR(rdev) != create->cr_specdata2)
628 goto out_umask;
629 status = nfsd_create(rqstp, &cstate->current_fh,
630 create->cr_name, create->cr_namelen,
631 &create->cr_iattr, S_IFBLK, rdev, &resfh);
632 break;
633
634 case NF4CHR:
635 status = nfserr_inval;
636 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
637 if (MAJOR(rdev) != create->cr_specdata1 ||
638 MINOR(rdev) != create->cr_specdata2)
639 goto out_umask;
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr,S_IFCHR, rdev, &resfh);
643 break;
644
645 case NF4SOCK:
646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFSOCK, 0, &resfh);
649 break;
650
651 case NF4FIFO:
652 status = nfsd_create(rqstp, &cstate->current_fh,
653 create->cr_name, create->cr_namelen,
654 &create->cr_iattr, S_IFIFO, 0, &resfh);
655 break;
656
657 case NF4DIR:
658 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
659 status = nfsd_create(rqstp, &cstate->current_fh,
660 create->cr_name, create->cr_namelen,
661 &create->cr_iattr, S_IFDIR, 0, &resfh);
662 break;
663
664 default:
665 status = nfserr_badtype;
666 }
667
668 if (status)
669 goto out;
670
671 if (create->cr_label.len)
672 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
673
674 if (create->cr_acl != NULL)
675 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
676 create->cr_bmval);
677
678 fh_unlock(&cstate->current_fh);
679 set_change_info(&create->cr_cinfo, &cstate->current_fh);
680 fh_dup2(&cstate->current_fh, &resfh);
681out:
682 fh_put(&resfh);
683out_umask:
684 current->fs->umask = 0;
685 return status;
686}
687
688static __be32
689nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
690 union nfsd4_op_u *u)
691{
692 struct nfsd4_getattr *getattr = &u->getattr;
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_suppattrs[cstate->minorversion][0];
703 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
704 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
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 union nfsd4_op_u *u)
713{
714 struct nfsd4_link *link = &u->link;
715 __be32 status;
716
717 status = nfsd_link(rqstp, &cstate->current_fh,
718 link->li_name, link->li_namelen, &cstate->save_fh);
719 if (!status)
720 set_change_info(&link->li_cinfo, &cstate->current_fh);
721 return status;
722}
723
724static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
725{
726 struct svc_fh tmp_fh;
727 __be32 ret;
728
729 fh_init(&tmp_fh, NFS4_FHSIZE);
730 ret = exp_pseudoroot(rqstp, &tmp_fh);
731 if (ret)
732 return ret;
733 if (tmp_fh.fh_dentry == fh->fh_dentry) {
734 fh_put(&tmp_fh);
735 return nfserr_noent;
736 }
737 fh_put(&tmp_fh);
738 return nfsd_lookup(rqstp, fh, "..", 2, fh);
739}
740
741static __be32
742nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
743 union nfsd4_op_u *u)
744{
745 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
746}
747
748static __be32
749nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
750 union nfsd4_op_u *u)
751{
752 return nfsd_lookup(rqstp, &cstate->current_fh,
753 u->lookup.lo_name, u->lookup.lo_len,
754 &cstate->current_fh);
755}
756
757static __be32
758nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
759 union nfsd4_op_u *u)
760{
761 struct nfsd4_read *read = &u->read;
762 __be32 status;
763
764 read->rd_filp = NULL;
765 if (read->rd_offset >= OFFSET_MAX)
766 return nfserr_inval;
767
768 trace_nfsd_read_start(rqstp, &cstate->current_fh,
769 read->rd_offset, read->rd_length);
770
771
772
773
774
775
776
777
778
779 if (!nfsd4_last_compound_op(rqstp))
780 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
781
782
783 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
784 &read->rd_stateid, RD_STATE,
785 &read->rd_filp, &read->rd_tmp_file);
786 if (status) {
787 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
788 goto out;
789 }
790 status = nfs_ok;
791out:
792 read->rd_rqstp = rqstp;
793 read->rd_fhp = &cstate->current_fh;
794 return status;
795}
796
797
798static void
799nfsd4_read_release(union nfsd4_op_u *u)
800{
801 if (u->read.rd_filp)
802 fput(u->read.rd_filp);
803 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
804 u->read.rd_offset, u->read.rd_length);
805}
806
807static __be32
808nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
809 union nfsd4_op_u *u)
810{
811 struct nfsd4_readdir *readdir = &u->readdir;
812 u64 cookie = readdir->rd_cookie;
813 static const nfs4_verifier zeroverf;
814
815
816
817 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
818 return nfserr_inval;
819
820 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
821 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
822 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
823
824 if ((cookie == 1) || (cookie == 2) ||
825 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
826 return nfserr_bad_cookie;
827
828 readdir->rd_rqstp = rqstp;
829 readdir->rd_fhp = &cstate->current_fh;
830 return nfs_ok;
831}
832
833static __be32
834nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
835 union nfsd4_op_u *u)
836{
837 u->readlink.rl_rqstp = rqstp;
838 u->readlink.rl_fhp = &cstate->current_fh;
839 return nfs_ok;
840}
841
842static __be32
843nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
844 union nfsd4_op_u *u)
845{
846 struct nfsd4_remove *remove = &u->remove;
847 __be32 status;
848
849 if (opens_in_grace(SVC_NET(rqstp)))
850 return nfserr_grace;
851 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
852 remove->rm_name, remove->rm_namelen);
853 if (!status) {
854 fh_unlock(&cstate->current_fh);
855 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
856 }
857 return status;
858}
859
860static __be32
861nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
862 union nfsd4_op_u *u)
863{
864 struct nfsd4_rename *rename = &u->rename;
865 __be32 status;
866
867 if (opens_in_grace(SVC_NET(rqstp)))
868 return nfserr_grace;
869 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
870 rename->rn_snamelen, &cstate->current_fh,
871 rename->rn_tname, rename->rn_tnamelen);
872 if (status)
873 return status;
874 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
875 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
876 return nfs_ok;
877}
878
879static __be32
880nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
881 union nfsd4_op_u *u)
882{
883 struct nfsd4_secinfo *secinfo = &u->secinfo;
884 struct svc_export *exp;
885 struct dentry *dentry;
886 __be32 err;
887
888 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
889 if (err)
890 return err;
891 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
892 secinfo->si_name, secinfo->si_namelen,
893 &exp, &dentry);
894 if (err)
895 return err;
896 fh_unlock(&cstate->current_fh);
897 if (d_really_is_negative(dentry)) {
898 exp_put(exp);
899 err = nfserr_noent;
900 } else
901 secinfo->si_exp = exp;
902 dput(dentry);
903 if (cstate->minorversion)
904
905 fh_put(&cstate->current_fh);
906 return err;
907}
908
909static __be32
910nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
911 union nfsd4_op_u *u)
912{
913 __be32 err;
914
915 switch (u->secinfo_no_name.sin_style) {
916 case NFS4_SECINFO_STYLE4_CURRENT_FH:
917 break;
918 case NFS4_SECINFO_STYLE4_PARENT:
919 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
920 if (err)
921 return err;
922 break;
923 default:
924 return nfserr_inval;
925 }
926
927 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
928 fh_put(&cstate->current_fh);
929 return nfs_ok;
930}
931
932static void
933nfsd4_secinfo_release(union nfsd4_op_u *u)
934{
935 if (u->secinfo.si_exp)
936 exp_put(u->secinfo.si_exp);
937}
938
939static void
940nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
941{
942 if (u->secinfo_no_name.sin_exp)
943 exp_put(u->secinfo_no_name.sin_exp);
944}
945
946static __be32
947nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
948 union nfsd4_op_u *u)
949{
950 struct nfsd4_setattr *setattr = &u->setattr;
951 __be32 status = nfs_ok;
952 int err;
953
954 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
955 status = nfs4_preprocess_stateid_op(rqstp, cstate,
956 &cstate->current_fh, &setattr->sa_stateid,
957 WR_STATE, NULL, NULL);
958 if (status) {
959 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
960 return status;
961 }
962 }
963 err = fh_want_write(&cstate->current_fh);
964 if (err)
965 return nfserrno(err);
966 status = nfs_ok;
967
968 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
969 nfsd_attrmask);
970 if (status)
971 goto out;
972
973 if (setattr->sa_acl != NULL)
974 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
975 setattr->sa_acl);
976 if (status)
977 goto out;
978 if (setattr->sa_label.len)
979 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
980 &setattr->sa_label);
981 if (status)
982 goto out;
983 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
984 0, (time_t)0);
985out:
986 fh_drop_write(&cstate->current_fh);
987 return status;
988}
989
990static __be32
991nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
992 union nfsd4_op_u *u)
993{
994 struct nfsd4_write *write = &u->write;
995 stateid_t *stateid = &write->wr_stateid;
996 struct file *filp = NULL;
997 __be32 status = nfs_ok;
998 unsigned long cnt;
999 int nvecs;
1000
1001 if (write->wr_offset >= OFFSET_MAX)
1002 return nfserr_inval;
1003
1004 cnt = write->wr_buflen;
1005 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1006 write->wr_offset, cnt);
1007 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1008 stateid, WR_STATE, &filp, NULL);
1009 if (status) {
1010 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1011 return status;
1012 }
1013
1014 write->wr_how_written = write->wr_stable_how;
1015 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1016
1017 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1018 &write->wr_head, write->wr_buflen);
1019 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1020
1021 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1022 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1023 write->wr_how_written);
1024 fput(filp);
1025
1026 write->wr_bytes_written = cnt;
1027 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1028 write->wr_offset, cnt);
1029 return status;
1030}
1031
1032static __be32
1033nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1034 stateid_t *src_stateid, struct file **src,
1035 stateid_t *dst_stateid, struct file **dst)
1036{
1037 __be32 status;
1038
1039 if (!cstate->save_fh.fh_dentry)
1040 return nfserr_nofilehandle;
1041
1042 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1043 src_stateid, RD_STATE, src, NULL);
1044 if (status) {
1045 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1046 goto out;
1047 }
1048
1049 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1050 dst_stateid, WR_STATE, dst, NULL);
1051 if (status) {
1052 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1053 goto out_put_src;
1054 }
1055
1056
1057 if (!S_ISREG(file_inode(*src)->i_mode) ||
1058 !S_ISREG(file_inode(*dst)->i_mode)) {
1059 status = nfserr_wrong_type;
1060 goto out_put_dst;
1061 }
1062
1063out:
1064 return status;
1065out_put_dst:
1066 fput(*dst);
1067out_put_src:
1068 fput(*src);
1069 goto out;
1070}
1071
1072static __be32
1073nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1074 union nfsd4_op_u *u)
1075{
1076 struct nfsd4_clone *clone = &u->clone;
1077 struct file *src, *dst;
1078 __be32 status;
1079
1080 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1081 &clone->cl_dst_stateid, &dst);
1082 if (status)
1083 goto out;
1084
1085 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1086 dst, clone->cl_dst_pos, clone->cl_count);
1087
1088 fput(dst);
1089 fput(src);
1090out:
1091 return status;
1092}
1093
1094void nfs4_put_copy(struct nfsd4_copy *copy)
1095{
1096 if (!refcount_dec_and_test(©->refcount))
1097 return;
1098 kfree(copy);
1099}
1100
1101static bool
1102check_and_set_stop_copy(struct nfsd4_copy *copy)
1103{
1104 bool value;
1105
1106 spin_lock(©->cp_clp->async_lock);
1107 value = copy->stopped;
1108 if (!copy->stopped)
1109 copy->stopped = true;
1110 spin_unlock(©->cp_clp->async_lock);
1111 return value;
1112}
1113
1114static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1115{
1116
1117 if (!check_and_set_stop_copy(copy))
1118 kthread_stop(copy->copy_task);
1119 nfs4_put_copy(copy);
1120}
1121
1122static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1123{
1124 struct nfsd4_copy *copy = NULL;
1125
1126 spin_lock(&clp->async_lock);
1127 if (!list_empty(&clp->async_copies)) {
1128 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1129 copies);
1130 refcount_inc(©->refcount);
1131 }
1132 spin_unlock(&clp->async_lock);
1133 return copy;
1134}
1135
1136void nfsd4_shutdown_copy(struct nfs4_client *clp)
1137{
1138 struct nfsd4_copy *copy;
1139
1140 while ((copy = nfsd4_get_copy(clp)) != NULL)
1141 nfsd4_stop_copy(copy);
1142}
1143
1144static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1145{
1146 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1147
1148 nfs4_put_copy(copy);
1149}
1150
1151static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1152 struct rpc_task *task)
1153{
1154 return 1;
1155}
1156
1157static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1158 .release = nfsd4_cb_offload_release,
1159 .done = nfsd4_cb_offload_done
1160};
1161
1162static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1163{
1164 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1165 copy->cp_synchronous = sync;
1166 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1167}
1168
1169static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1170{
1171 ssize_t bytes_copied = 0;
1172 size_t bytes_total = copy->cp_count;
1173 u64 src_pos = copy->cp_src_pos;
1174 u64 dst_pos = copy->cp_dst_pos;
1175
1176 do {
1177 if (kthread_should_stop())
1178 break;
1179 bytes_copied = nfsd_copy_file_range(copy->file_src, src_pos,
1180 copy->file_dst, dst_pos, bytes_total);
1181 if (bytes_copied <= 0)
1182 break;
1183 bytes_total -= bytes_copied;
1184 copy->cp_res.wr_bytes_written += bytes_copied;
1185 src_pos += bytes_copied;
1186 dst_pos += bytes_copied;
1187 } while (bytes_total > 0 && !copy->cp_synchronous);
1188 return bytes_copied;
1189}
1190
1191static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1192{
1193 __be32 status;
1194 ssize_t bytes;
1195
1196 bytes = _nfsd_copy_file_range(copy);
1197
1198
1199
1200 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1201 status = nfserrno(bytes);
1202 else {
1203 nfsd4_init_copy_res(copy, sync);
1204 status = nfs_ok;
1205 }
1206
1207 fput(copy->file_src);
1208 fput(copy->file_dst);
1209 return status;
1210}
1211
1212static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1213{
1214 dst->cp_src_pos = src->cp_src_pos;
1215 dst->cp_dst_pos = src->cp_dst_pos;
1216 dst->cp_count = src->cp_count;
1217 dst->cp_synchronous = src->cp_synchronous;
1218 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1219 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1220 dst->cp_clp = src->cp_clp;
1221 dst->file_dst = get_file(src->file_dst);
1222 dst->file_src = get_file(src->file_src);
1223 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1224}
1225
1226static void cleanup_async_copy(struct nfsd4_copy *copy)
1227{
1228 nfs4_free_cp_state(copy);
1229 fput(copy->file_dst);
1230 fput(copy->file_src);
1231 spin_lock(©->cp_clp->async_lock);
1232 list_del(©->copies);
1233 spin_unlock(©->cp_clp->async_lock);
1234 nfs4_put_copy(copy);
1235}
1236
1237static int nfsd4_do_async_copy(void *data)
1238{
1239 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1240 struct nfsd4_copy *cb_copy;
1241
1242 copy->nfserr = nfsd4_do_copy(copy, 0);
1243 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1244 if (!cb_copy)
1245 goto out;
1246 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1247 cb_copy->cp_clp = copy->cp_clp;
1248 cb_copy->nfserr = copy->nfserr;
1249 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1250 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1251 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1252 nfsd4_run_cb(&cb_copy->cp_cb);
1253out:
1254 cleanup_async_copy(copy);
1255 return 0;
1256}
1257
1258static __be32
1259nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1260 union nfsd4_op_u *u)
1261{
1262 struct nfsd4_copy *copy = &u->copy;
1263 __be32 status;
1264 struct nfsd4_copy *async_copy = NULL;
1265
1266 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1267 ©->file_src, ©->cp_dst_stateid,
1268 ©->file_dst);
1269 if (status)
1270 goto out;
1271
1272 copy->cp_clp = cstate->clp;
1273 memcpy(©->fh, &cstate->current_fh.fh_handle,
1274 sizeof(struct knfsd_fh));
1275 if (!copy->cp_synchronous) {
1276 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1277
1278 status = nfserrno(-ENOMEM);
1279 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1280 if (!async_copy)
1281 goto out;
1282 if (!nfs4_init_cp_state(nn, copy)) {
1283 kfree(async_copy);
1284 goto out;
1285 }
1286 refcount_set(&async_copy->refcount, 1);
1287 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1288 sizeof(copy->cp_stateid));
1289 dup_copy_fields(copy, async_copy);
1290 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1291 async_copy, "%s", "copy thread");
1292 if (IS_ERR(async_copy->copy_task))
1293 goto out_err;
1294 spin_lock(&async_copy->cp_clp->async_lock);
1295 list_add(&async_copy->copies,
1296 &async_copy->cp_clp->async_copies);
1297 spin_unlock(&async_copy->cp_clp->async_lock);
1298 wake_up_process(async_copy->copy_task);
1299 status = nfs_ok;
1300 } else
1301 status = nfsd4_do_copy(copy, 1);
1302out:
1303 return status;
1304out_err:
1305 cleanup_async_copy(async_copy);
1306 goto out;
1307}
1308
1309struct nfsd4_copy *
1310find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1311{
1312 struct nfsd4_copy *copy;
1313
1314 spin_lock(&clp->async_lock);
1315 list_for_each_entry(copy, &clp->async_copies, copies) {
1316 if (memcmp(©->cp_stateid, stateid, NFS4_STATEID_SIZE))
1317 continue;
1318 refcount_inc(©->refcount);
1319 spin_unlock(&clp->async_lock);
1320 return copy;
1321 }
1322 spin_unlock(&clp->async_lock);
1323 return NULL;
1324}
1325
1326static __be32
1327nfsd4_offload_cancel(struct svc_rqst *rqstp,
1328 struct nfsd4_compound_state *cstate,
1329 union nfsd4_op_u *u)
1330{
1331 struct nfsd4_offload_status *os = &u->offload_status;
1332 __be32 status = 0;
1333 struct nfsd4_copy *copy;
1334 struct nfs4_client *clp = cstate->clp;
1335
1336 copy = find_async_copy(clp, &os->stateid);
1337 if (copy)
1338 nfsd4_stop_copy(copy);
1339 else
1340 status = nfserr_bad_stateid;
1341
1342 return status;
1343}
1344
1345static __be32
1346nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1347 struct nfsd4_fallocate *fallocate, int flags)
1348{
1349 __be32 status;
1350 struct file *file;
1351
1352 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1353 &fallocate->falloc_stateid,
1354 WR_STATE, &file, NULL);
1355 if (status != nfs_ok) {
1356 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1357 return status;
1358 }
1359
1360 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1361 fallocate->falloc_offset,
1362 fallocate->falloc_length,
1363 flags);
1364 fput(file);
1365 return status;
1366}
1367static __be32
1368nfsd4_offload_status(struct svc_rqst *rqstp,
1369 struct nfsd4_compound_state *cstate,
1370 union nfsd4_op_u *u)
1371{
1372 struct nfsd4_offload_status *os = &u->offload_status;
1373 __be32 status = 0;
1374 struct nfsd4_copy *copy;
1375 struct nfs4_client *clp = cstate->clp;
1376
1377 copy = find_async_copy(clp, &os->stateid);
1378 if (copy) {
1379 os->count = copy->cp_res.wr_bytes_written;
1380 nfs4_put_copy(copy);
1381 } else
1382 status = nfserr_bad_stateid;
1383
1384 return status;
1385}
1386
1387static __be32
1388nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1389 union nfsd4_op_u *u)
1390{
1391 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1392}
1393
1394static __be32
1395nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1396 union nfsd4_op_u *u)
1397{
1398 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1399 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1400}
1401
1402static __be32
1403nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1404 union nfsd4_op_u *u)
1405{
1406 struct nfsd4_seek *seek = &u->seek;
1407 int whence;
1408 __be32 status;
1409 struct file *file;
1410
1411 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1412 &seek->seek_stateid,
1413 RD_STATE, &file, NULL);
1414 if (status) {
1415 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1416 return status;
1417 }
1418
1419 switch (seek->seek_whence) {
1420 case NFS4_CONTENT_DATA:
1421 whence = SEEK_DATA;
1422 break;
1423 case NFS4_CONTENT_HOLE:
1424 whence = SEEK_HOLE;
1425 break;
1426 default:
1427 status = nfserr_union_notsupp;
1428 goto out;
1429 }
1430
1431
1432
1433
1434
1435 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1436 if (seek->seek_pos < 0)
1437 status = nfserrno(seek->seek_pos);
1438 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1439 seek->seek_eof = true;
1440
1441out:
1442 fput(file);
1443 return status;
1444}
1445
1446
1447
1448
1449
1450
1451static __be32
1452_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1453 struct nfsd4_verify *verify)
1454{
1455 __be32 *buf, *p;
1456 int count;
1457 __be32 status;
1458
1459 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1460 if (status)
1461 return status;
1462
1463 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1464 if (status)
1465 return status;
1466
1467 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1468 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1469 return nfserr_inval;
1470 if (verify->ve_attrlen & 3)
1471 return nfserr_inval;
1472
1473
1474
1475
1476 count = 4 + (verify->ve_attrlen >> 2);
1477 buf = kmalloc(count << 2, GFP_KERNEL);
1478 if (!buf)
1479 return nfserr_jukebox;
1480
1481 p = buf;
1482 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1483 cstate->current_fh.fh_export,
1484 cstate->current_fh.fh_dentry,
1485 verify->ve_bmval,
1486 rqstp, 0);
1487
1488
1489
1490
1491 if (status == nfserr_resource)
1492 status = nfserr_not_same;
1493 if (status)
1494 goto out_kfree;
1495
1496
1497 p = buf + 1 + ntohl(buf[0]);
1498 status = nfserr_not_same;
1499 if (ntohl(*p++) != verify->ve_attrlen)
1500 goto out_kfree;
1501 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1502 status = nfserr_same;
1503
1504out_kfree:
1505 kfree(buf);
1506 return status;
1507}
1508
1509static __be32
1510nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1511 union nfsd4_op_u *u)
1512{
1513 __be32 status;
1514
1515 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1516 return status == nfserr_not_same ? nfs_ok : status;
1517}
1518
1519static __be32
1520nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1521 union nfsd4_op_u *u)
1522{
1523 __be32 status;
1524
1525 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1526 return status == nfserr_same ? nfs_ok : status;
1527}
1528
1529#ifdef CONFIG_NFSD_PNFS
1530static const struct nfsd4_layout_ops *
1531nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1532{
1533 if (!exp->ex_layout_types) {
1534 dprintk("%s: export does not support pNFS\n", __func__);
1535 return NULL;
1536 }
1537
1538 if (layout_type >= LAYOUT_TYPE_MAX ||
1539 !(exp->ex_layout_types & (1 << layout_type))) {
1540 dprintk("%s: layout type %d not supported\n",
1541 __func__, layout_type);
1542 return NULL;
1543 }
1544
1545 return nfsd4_layout_ops[layout_type];
1546}
1547
1548static __be32
1549nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1550 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1551{
1552 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1553 const struct nfsd4_layout_ops *ops;
1554 struct nfsd4_deviceid_map *map;
1555 struct svc_export *exp;
1556 __be32 nfserr;
1557
1558 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1559 __func__,
1560 gdp->gd_layout_type,
1561 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1562 gdp->gd_maxcount);
1563
1564 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1565 if (!map) {
1566 dprintk("%s: couldn't find device ID to export mapping!\n",
1567 __func__);
1568 return nfserr_noent;
1569 }
1570
1571 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1572 if (IS_ERR(exp)) {
1573 dprintk("%s: could not find device id\n", __func__);
1574 return nfserr_noent;
1575 }
1576
1577 nfserr = nfserr_layoutunavailable;
1578 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1579 if (!ops)
1580 goto out;
1581
1582 nfserr = nfs_ok;
1583 if (gdp->gd_maxcount != 0) {
1584 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1585 rqstp, cstate->session->se_client, gdp);
1586 }
1587
1588 gdp->gd_notify_types &= ops->notify_types;
1589out:
1590 exp_put(exp);
1591 return nfserr;
1592}
1593
1594static void
1595nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1596{
1597 kfree(u->getdeviceinfo.gd_device);
1598}
1599
1600static __be32
1601nfsd4_layoutget(struct svc_rqst *rqstp,
1602 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1603{
1604 struct nfsd4_layoutget *lgp = &u->layoutget;
1605 struct svc_fh *current_fh = &cstate->current_fh;
1606 const struct nfsd4_layout_ops *ops;
1607 struct nfs4_layout_stateid *ls;
1608 __be32 nfserr;
1609 int accmode = NFSD_MAY_READ_IF_EXEC;
1610
1611 switch (lgp->lg_seg.iomode) {
1612 case IOMODE_READ:
1613 accmode |= NFSD_MAY_READ;
1614 break;
1615 case IOMODE_RW:
1616 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1617 break;
1618 default:
1619 dprintk("%s: invalid iomode %d\n",
1620 __func__, lgp->lg_seg.iomode);
1621 nfserr = nfserr_badiomode;
1622 goto out;
1623 }
1624
1625 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1626 if (nfserr)
1627 goto out;
1628
1629 nfserr = nfserr_layoutunavailable;
1630 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1631 if (!ops)
1632 goto out;
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645 nfserr = nfserr_inval;
1646 if (lgp->lg_seg.length < lgp->lg_minlength ||
1647 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1648 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1649 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1650 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1651 goto out;
1652 if (lgp->lg_seg.length == 0)
1653 goto out;
1654
1655 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1656 true, lgp->lg_layout_type, &ls);
1657 if (nfserr) {
1658 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1659 goto out;
1660 }
1661
1662 nfserr = nfserr_recallconflict;
1663 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1664 goto out_put_stid;
1665
1666 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1667 current_fh, lgp);
1668 if (nfserr)
1669 goto out_put_stid;
1670
1671 nfserr = nfsd4_insert_layout(lgp, ls);
1672
1673out_put_stid:
1674 mutex_unlock(&ls->ls_mutex);
1675 nfs4_put_stid(&ls->ls_stid);
1676out:
1677 return nfserr;
1678}
1679
1680static void
1681nfsd4_layoutget_release(union nfsd4_op_u *u)
1682{
1683 kfree(u->layoutget.lg_content);
1684}
1685
1686static __be32
1687nfsd4_layoutcommit(struct svc_rqst *rqstp,
1688 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1689{
1690 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1691 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1692 struct svc_fh *current_fh = &cstate->current_fh;
1693 const struct nfsd4_layout_ops *ops;
1694 loff_t new_size = lcp->lc_last_wr + 1;
1695 struct inode *inode;
1696 struct nfs4_layout_stateid *ls;
1697 __be32 nfserr;
1698
1699 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1700 if (nfserr)
1701 goto out;
1702
1703 nfserr = nfserr_layoutunavailable;
1704 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1705 if (!ops)
1706 goto out;
1707 inode = d_inode(current_fh->fh_dentry);
1708
1709 nfserr = nfserr_inval;
1710 if (new_size <= seg->offset) {
1711 dprintk("pnfsd: last write before layout segment\n");
1712 goto out;
1713 }
1714 if (new_size > seg->offset + seg->length) {
1715 dprintk("pnfsd: last write beyond layout segment\n");
1716 goto out;
1717 }
1718 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1719 dprintk("pnfsd: layoutcommit beyond EOF\n");
1720 goto out;
1721 }
1722
1723 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1724 false, lcp->lc_layout_type,
1725 &ls);
1726 if (nfserr) {
1727 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
1728
1729 if (nfserr == nfserr_bad_stateid)
1730 nfserr = nfserr_badlayout;
1731 goto out;
1732 }
1733
1734
1735 mutex_unlock(&ls->ls_mutex);
1736
1737 if (new_size > i_size_read(inode)) {
1738 lcp->lc_size_chg = 1;
1739 lcp->lc_newsize = new_size;
1740 } else {
1741 lcp->lc_size_chg = 0;
1742 }
1743
1744 nfserr = ops->proc_layoutcommit(inode, lcp);
1745 nfs4_put_stid(&ls->ls_stid);
1746out:
1747 return nfserr;
1748}
1749
1750static __be32
1751nfsd4_layoutreturn(struct svc_rqst *rqstp,
1752 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1753{
1754 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1755 struct svc_fh *current_fh = &cstate->current_fh;
1756 __be32 nfserr;
1757
1758 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1759 if (nfserr)
1760 goto out;
1761
1762 nfserr = nfserr_layoutunavailable;
1763 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1764 goto out;
1765
1766 switch (lrp->lr_seg.iomode) {
1767 case IOMODE_READ:
1768 case IOMODE_RW:
1769 case IOMODE_ANY:
1770 break;
1771 default:
1772 dprintk("%s: invalid iomode %d\n", __func__,
1773 lrp->lr_seg.iomode);
1774 nfserr = nfserr_inval;
1775 goto out;
1776 }
1777
1778 switch (lrp->lr_return_type) {
1779 case RETURN_FILE:
1780 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1781 break;
1782 case RETURN_FSID:
1783 case RETURN_ALL:
1784 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1785 break;
1786 default:
1787 dprintk("%s: invalid return_type %d\n", __func__,
1788 lrp->lr_return_type);
1789 nfserr = nfserr_inval;
1790 break;
1791 }
1792out:
1793 return nfserr;
1794}
1795#endif
1796
1797
1798
1799
1800static __be32
1801nfsd4_proc_null(struct svc_rqst *rqstp)
1802{
1803 return nfs_ok;
1804}
1805
1806static inline void nfsd4_increment_op_stats(u32 opnum)
1807{
1808 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1809 nfsdstats.nfs4_opcount[opnum]++;
1810}
1811
1812static const struct nfsd4_operation nfsd4_ops[];
1813
1814static const char *nfsd4_op_name(unsigned opnum);
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1829{
1830 struct nfsd4_op *first_op = &args->ops[0];
1831
1832
1833 if (args->minorversion == 0)
1834 return nfs_ok;
1835
1836 if (args->opcnt == 0)
1837 return nfs_ok;
1838 if (first_op->status == nfserr_op_illegal)
1839 return nfs_ok;
1840 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1841 return nfserr_op_not_in_session;
1842 if (first_op->opnum == OP_SEQUENCE)
1843 return nfs_ok;
1844
1845
1846
1847
1848
1849 if (args->opcnt != 1)
1850 return nfserr_not_only_op;
1851 return nfs_ok;
1852}
1853
1854const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1855{
1856 return &nfsd4_ops[op->opnum];
1857}
1858
1859bool nfsd4_cache_this_op(struct nfsd4_op *op)
1860{
1861 if (op->opnum == OP_ILLEGAL)
1862 return false;
1863 return OPDESC(op)->op_flags & OP_CACHEME;
1864}
1865
1866static bool need_wrongsec_check(struct svc_rqst *rqstp)
1867{
1868 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1869 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1870 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1871 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1872 const struct nfsd4_operation *thisd = OPDESC(this);
1873 const struct nfsd4_operation *nextd;
1874
1875
1876
1877
1878
1879 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1880 return false;
1881
1882
1883
1884
1885
1886 if (argp->opcnt == resp->opcnt)
1887 return false;
1888 if (next->opnum == OP_ILLEGAL)
1889 return false;
1890 nextd = OPDESC(next);
1891
1892
1893
1894
1895
1896 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1897}
1898
1899static void svcxdr_init_encode(struct svc_rqst *rqstp,
1900 struct nfsd4_compoundres *resp)
1901{
1902 struct xdr_stream *xdr = &resp->xdr;
1903 struct xdr_buf *buf = &rqstp->rq_res;
1904 struct kvec *head = buf->head;
1905
1906 xdr->buf = buf;
1907 xdr->iov = head;
1908 xdr->p = head->iov_base + head->iov_len;
1909 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1910
1911 buf->len = buf->head[0].iov_len;
1912 xdr->scratch.iov_len = 0;
1913 xdr->page_ptr = buf->pages - 1;
1914 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1915 - rqstp->rq_auth_slack;
1916}
1917
1918
1919
1920
1921static __be32
1922nfsd4_proc_compound(struct svc_rqst *rqstp)
1923{
1924 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1925 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1926 struct nfsd4_op *op;
1927 struct nfsd4_compound_state *cstate = &resp->cstate;
1928 struct svc_fh *current_fh = &cstate->current_fh;
1929 struct svc_fh *save_fh = &cstate->save_fh;
1930 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1931 __be32 status;
1932
1933 svcxdr_init_encode(rqstp, resp);
1934 resp->tagp = resp->xdr.p;
1935
1936 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1937 resp->taglen = args->taglen;
1938 resp->tag = args->tag;
1939 resp->rqstp = rqstp;
1940 cstate->minorversion = args->minorversion;
1941 fh_init(current_fh, NFS4_FHSIZE);
1942 fh_init(save_fh, NFS4_FHSIZE);
1943
1944
1945
1946
1947 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1948
1949
1950
1951
1952 status = nfserr_minor_vers_mismatch;
1953 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1954 goto out;
1955 status = nfserr_resource;
1956 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1957 goto out;
1958
1959 status = nfs41_check_op_ordering(args);
1960 if (status) {
1961 op = &args->ops[0];
1962 op->status = status;
1963 resp->opcnt = 1;
1964 goto encode_op;
1965 }
1966
1967 trace_nfsd_compound(rqstp, args->opcnt);
1968 while (!status && resp->opcnt < args->opcnt) {
1969 op = &args->ops[resp->opcnt++];
1970
1971
1972
1973
1974
1975
1976 if (op->status) {
1977 if (op->opnum == OP_OPEN)
1978 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1979 goto encode_op;
1980 }
1981
1982 if (!current_fh->fh_dentry) {
1983 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1984 op->status = nfserr_nofilehandle;
1985 goto encode_op;
1986 }
1987 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1988 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1989 op->status = nfserr_moved;
1990 goto encode_op;
1991 }
1992
1993 fh_clear_wcc(current_fh);
1994
1995
1996 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1997
1998
1999
2000
2001 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2002
2003
2004
2005
2006 if (resp->opcnt < args->opcnt)
2007 plen += COMPOUND_ERR_SLACK_SPACE;
2008 op->status = nfsd4_check_resp_size(resp, plen);
2009 }
2010
2011 if (op->status)
2012 goto encode_op;
2013
2014 if (op->opdesc->op_get_currentstateid)
2015 op->opdesc->op_get_currentstateid(cstate, &op->u);
2016 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2017
2018
2019 if (cstate->status == nfserr_replay_cache) {
2020 dprintk("%s NFS4.1 replay from cache\n", __func__);
2021 status = op->status;
2022 goto out;
2023 }
2024 if (!op->status) {
2025 if (op->opdesc->op_set_currentstateid)
2026 op->opdesc->op_set_currentstateid(cstate, &op->u);
2027
2028 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2029 clear_current_stateid(cstate);
2030
2031 if (need_wrongsec_check(rqstp))
2032 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2033 }
2034encode_op:
2035 if (op->status == nfserr_replay_me) {
2036 op->replay = &cstate->replay_owner->so_replay;
2037 nfsd4_encode_replay(&resp->xdr, op);
2038 status = op->status = op->replay->rp_status;
2039 } else {
2040 nfsd4_encode_operation(resp, op);
2041 status = op->status;
2042 }
2043
2044 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2045 nfsd4_op_name(op->opnum));
2046
2047 nfsd4_cstate_clear_replay(cstate);
2048 nfsd4_increment_op_stats(op->opnum);
2049 }
2050
2051 cstate->status = status;
2052 fh_put(current_fh);
2053 fh_put(save_fh);
2054 BUG_ON(cstate->replay_owner);
2055out:
2056
2057 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2058 dprintk("nfsv4 compound returned %d\n", ntohl(status));
2059 return status;
2060}
2061
2062#define op_encode_hdr_size (2)
2063#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2064#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2065#define op_encode_change_info_maxsz (5)
2066#define nfs4_fattr_bitmap_maxsz (4)
2067
2068
2069#define op_encode_lockowner_maxsz (0)
2070#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2071
2072#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2073
2074#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2075#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2076 op_encode_ace_maxsz)
2077
2078#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2079
2080static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2081{
2082 return (op_encode_hdr_size) * sizeof(__be32);
2083}
2084
2085static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2086{
2087 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2088}
2089
2090static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2091{
2092
2093 return (op_encode_hdr_size + 2)* sizeof(__be32);
2094}
2095
2096static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2097{
2098 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2099}
2100
2101static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2102{
2103 return (op_encode_hdr_size + op_encode_change_info_maxsz
2104 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2105}
2106
2107
2108
2109
2110
2111
2112static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2113 struct nfsd4_op *op)
2114{
2115 u32 *bmap = op->u.getattr.ga_bmval;
2116 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2117 u32 ret = 0;
2118
2119 if (bmap0 & FATTR4_WORD0_ACL)
2120 return svc_max_payload(rqstp);
2121 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2122 return svc_max_payload(rqstp);
2123
2124 if (bmap1 & FATTR4_WORD1_OWNER) {
2125 ret += IDMAP_NAMESZ + 4;
2126 bmap1 &= ~FATTR4_WORD1_OWNER;
2127 }
2128 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2129 ret += IDMAP_NAMESZ + 4;
2130 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2131 }
2132 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2133 ret += NFS4_FHSIZE + 4;
2134 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2135 }
2136 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2137 ret += NFS4_MAXLABELLEN + 12;
2138 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2139 }
2140
2141
2142
2143
2144 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2145
2146 ret += 20;
2147 return ret;
2148}
2149
2150static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2151{
2152 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2153}
2154
2155static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2156{
2157 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2158 * sizeof(__be32);
2159}
2160
2161static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2162{
2163 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2164 * sizeof(__be32);
2165}
2166
2167static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2168{
2169 return (op_encode_hdr_size + op_encode_stateid_maxsz
2170 + op_encode_change_info_maxsz + 1
2171 + nfs4_fattr_bitmap_maxsz
2172 + op_encode_delegation_maxsz) * sizeof(__be32);
2173}
2174
2175static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2176{
2177 u32 maxcount = 0, rlen = 0;
2178
2179 maxcount = svc_max_payload(rqstp);
2180 rlen = min(op->u.read.rd_length, maxcount);
2181
2182 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2183}
2184
2185static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2186{
2187 u32 maxcount = 0, rlen = 0;
2188
2189 maxcount = svc_max_payload(rqstp);
2190 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2191
2192 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2193 XDR_QUADLEN(rlen)) * sizeof(__be32);
2194}
2195
2196static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2197{
2198 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2199}
2200
2201static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2202{
2203 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2204 * sizeof(__be32);
2205}
2206
2207static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2208{
2209 return (op_encode_hdr_size + op_encode_change_info_maxsz
2210 + op_encode_change_info_maxsz) * sizeof(__be32);
2211}
2212
2213static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2214 struct nfsd4_op *op)
2215{
2216 return (op_encode_hdr_size
2217 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2218}
2219
2220static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2221{
2222 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2223 * sizeof(__be32);
2224}
2225
2226static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2227{
2228 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2229}
2230
2231static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2232{
2233 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2234 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2235}
2236
2237static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2238{
2239 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2240 sizeof(__be32);
2241}
2242
2243static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2244{
2245 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2246}
2247
2248static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2249{
2250 return (op_encode_hdr_size + 2 + 1 + \
2251 1 + 1 + \
2252 4 + \
2253 2 + \
2254 \
2255 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2256 \
2257 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2258 1 + \
2259 0 ) * sizeof(__be32);
2260}
2261
2262static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2263{
2264 return (op_encode_hdr_size + \
2265 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2266 2 ) * sizeof(__be32);
2267}
2268
2269static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2270{
2271 return (op_encode_hdr_size + \
2272 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2273 2 + \
2274 op_encode_channel_attrs_maxsz + \
2275 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2276}
2277
2278static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2279{
2280 return (op_encode_hdr_size +
2281 1 +
2282 op_encode_stateid_maxsz +
2283 2 +
2284 1 +
2285 op_encode_verifier_maxsz +
2286 1 +
2287 1 ) * sizeof(__be32);
2288}
2289
2290static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2291 struct nfsd4_op *op)
2292{
2293 return (op_encode_hdr_size +
2294 2 +
2295 1 ) * sizeof(__be32);
2296}
2297
2298#ifdef CONFIG_NFSD_PNFS
2299static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2300{
2301 u32 maxcount = 0, rlen = 0;
2302
2303 maxcount = svc_max_payload(rqstp);
2304 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2305
2306 return (op_encode_hdr_size +
2307 1 +
2308 XDR_QUADLEN(rlen) +
2309 2 ) * sizeof(__be32);
2310}
2311
2312
2313
2314
2315
2316#define MAX_LAYOUT_SIZE 128
2317static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2318{
2319 return (op_encode_hdr_size +
2320 1 +
2321 op_encode_stateid_maxsz +
2322 1 +
2323 MAX_LAYOUT_SIZE) * sizeof(__be32);
2324}
2325
2326static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2327{
2328 return (op_encode_hdr_size +
2329 1 +
2330 2 ) * sizeof(__be32);
2331}
2332
2333static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2334{
2335 return (op_encode_hdr_size +
2336 1 +
2337 op_encode_stateid_maxsz) * sizeof(__be32);
2338}
2339#endif
2340
2341
2342static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2343{
2344 return (op_encode_hdr_size + 3) * sizeof(__be32);
2345}
2346
2347static const struct nfsd4_operation nfsd4_ops[] = {
2348 [OP_ACCESS] = {
2349 .op_func = nfsd4_access,
2350 .op_name = "OP_ACCESS",
2351 .op_rsize_bop = nfsd4_access_rsize,
2352 },
2353 [OP_CLOSE] = {
2354 .op_func = nfsd4_close,
2355 .op_flags = OP_MODIFIES_SOMETHING,
2356 .op_name = "OP_CLOSE",
2357 .op_rsize_bop = nfsd4_status_stateid_rsize,
2358 .op_get_currentstateid = nfsd4_get_closestateid,
2359 .op_set_currentstateid = nfsd4_set_closestateid,
2360 },
2361 [OP_COMMIT] = {
2362 .op_func = nfsd4_commit,
2363 .op_flags = OP_MODIFIES_SOMETHING,
2364 .op_name = "OP_COMMIT",
2365 .op_rsize_bop = nfsd4_commit_rsize,
2366 },
2367 [OP_CREATE] = {
2368 .op_func = nfsd4_create,
2369 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2370 .op_name = "OP_CREATE",
2371 .op_rsize_bop = nfsd4_create_rsize,
2372 },
2373 [OP_DELEGRETURN] = {
2374 .op_func = nfsd4_delegreturn,
2375 .op_flags = OP_MODIFIES_SOMETHING,
2376 .op_name = "OP_DELEGRETURN",
2377 .op_rsize_bop = nfsd4_only_status_rsize,
2378 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2379 },
2380 [OP_GETATTR] = {
2381 .op_func = nfsd4_getattr,
2382 .op_flags = ALLOWED_ON_ABSENT_FS,
2383 .op_rsize_bop = nfsd4_getattr_rsize,
2384 .op_name = "OP_GETATTR",
2385 },
2386 [OP_GETFH] = {
2387 .op_func = nfsd4_getfh,
2388 .op_name = "OP_GETFH",
2389 .op_rsize_bop = nfsd4_getfh_rsize,
2390 },
2391 [OP_LINK] = {
2392 .op_func = nfsd4_link,
2393 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2394 | OP_CACHEME,
2395 .op_name = "OP_LINK",
2396 .op_rsize_bop = nfsd4_link_rsize,
2397 },
2398 [OP_LOCK] = {
2399 .op_func = nfsd4_lock,
2400 .op_flags = OP_MODIFIES_SOMETHING |
2401 OP_NONTRIVIAL_ERROR_ENCODE,
2402 .op_name = "OP_LOCK",
2403 .op_rsize_bop = nfsd4_lock_rsize,
2404 .op_set_currentstateid = nfsd4_set_lockstateid,
2405 },
2406 [OP_LOCKT] = {
2407 .op_func = nfsd4_lockt,
2408 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2409 .op_name = "OP_LOCKT",
2410 .op_rsize_bop = nfsd4_lock_rsize,
2411 },
2412 [OP_LOCKU] = {
2413 .op_func = nfsd4_locku,
2414 .op_flags = OP_MODIFIES_SOMETHING,
2415 .op_name = "OP_LOCKU",
2416 .op_rsize_bop = nfsd4_status_stateid_rsize,
2417 .op_get_currentstateid = nfsd4_get_lockustateid,
2418 },
2419 [OP_LOOKUP] = {
2420 .op_func = nfsd4_lookup,
2421 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2422 .op_name = "OP_LOOKUP",
2423 .op_rsize_bop = nfsd4_only_status_rsize,
2424 },
2425 [OP_LOOKUPP] = {
2426 .op_func = nfsd4_lookupp,
2427 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2428 .op_name = "OP_LOOKUPP",
2429 .op_rsize_bop = nfsd4_only_status_rsize,
2430 },
2431 [OP_NVERIFY] = {
2432 .op_func = nfsd4_nverify,
2433 .op_name = "OP_NVERIFY",
2434 .op_rsize_bop = nfsd4_only_status_rsize,
2435 },
2436 [OP_OPEN] = {
2437 .op_func = nfsd4_open,
2438 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2439 .op_name = "OP_OPEN",
2440 .op_rsize_bop = nfsd4_open_rsize,
2441 .op_set_currentstateid = nfsd4_set_openstateid,
2442 },
2443 [OP_OPEN_CONFIRM] = {
2444 .op_func = nfsd4_open_confirm,
2445 .op_flags = OP_MODIFIES_SOMETHING,
2446 .op_name = "OP_OPEN_CONFIRM",
2447 .op_rsize_bop = nfsd4_status_stateid_rsize,
2448 },
2449 [OP_OPEN_DOWNGRADE] = {
2450 .op_func = nfsd4_open_downgrade,
2451 .op_flags = OP_MODIFIES_SOMETHING,
2452 .op_name = "OP_OPEN_DOWNGRADE",
2453 .op_rsize_bop = nfsd4_status_stateid_rsize,
2454 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2455 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2456 },
2457 [OP_PUTFH] = {
2458 .op_func = nfsd4_putfh,
2459 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2460 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2461 .op_name = "OP_PUTFH",
2462 .op_rsize_bop = nfsd4_only_status_rsize,
2463 },
2464 [OP_PUTPUBFH] = {
2465 .op_func = nfsd4_putrootfh,
2466 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2467 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2468 .op_name = "OP_PUTPUBFH",
2469 .op_rsize_bop = nfsd4_only_status_rsize,
2470 },
2471 [OP_PUTROOTFH] = {
2472 .op_func = nfsd4_putrootfh,
2473 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2474 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2475 .op_name = "OP_PUTROOTFH",
2476 .op_rsize_bop = nfsd4_only_status_rsize,
2477 },
2478 [OP_READ] = {
2479 .op_func = nfsd4_read,
2480 .op_release = nfsd4_read_release,
2481 .op_name = "OP_READ",
2482 .op_rsize_bop = nfsd4_read_rsize,
2483 .op_get_currentstateid = nfsd4_get_readstateid,
2484 },
2485 [OP_READDIR] = {
2486 .op_func = nfsd4_readdir,
2487 .op_name = "OP_READDIR",
2488 .op_rsize_bop = nfsd4_readdir_rsize,
2489 },
2490 [OP_READLINK] = {
2491 .op_func = nfsd4_readlink,
2492 .op_name = "OP_READLINK",
2493 .op_rsize_bop = nfsd4_readlink_rsize,
2494 },
2495 [OP_REMOVE] = {
2496 .op_func = nfsd4_remove,
2497 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2498 .op_name = "OP_REMOVE",
2499 .op_rsize_bop = nfsd4_remove_rsize,
2500 },
2501 [OP_RENAME] = {
2502 .op_func = nfsd4_rename,
2503 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2504 .op_name = "OP_RENAME",
2505 .op_rsize_bop = nfsd4_rename_rsize,
2506 },
2507 [OP_RENEW] = {
2508 .op_func = nfsd4_renew,
2509 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2510 | OP_MODIFIES_SOMETHING,
2511 .op_name = "OP_RENEW",
2512 .op_rsize_bop = nfsd4_only_status_rsize,
2513
2514 },
2515 [OP_RESTOREFH] = {
2516 .op_func = nfsd4_restorefh,
2517 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2518 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2519 .op_name = "OP_RESTOREFH",
2520 .op_rsize_bop = nfsd4_only_status_rsize,
2521 },
2522 [OP_SAVEFH] = {
2523 .op_func = nfsd4_savefh,
2524 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2525 .op_name = "OP_SAVEFH",
2526 .op_rsize_bop = nfsd4_only_status_rsize,
2527 },
2528 [OP_SECINFO] = {
2529 .op_func = nfsd4_secinfo,
2530 .op_release = nfsd4_secinfo_release,
2531 .op_flags = OP_HANDLES_WRONGSEC,
2532 .op_name = "OP_SECINFO",
2533 .op_rsize_bop = nfsd4_secinfo_rsize,
2534 },
2535 [OP_SETATTR] = {
2536 .op_func = nfsd4_setattr,
2537 .op_name = "OP_SETATTR",
2538 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2539 | OP_NONTRIVIAL_ERROR_ENCODE,
2540 .op_rsize_bop = nfsd4_setattr_rsize,
2541 .op_get_currentstateid = nfsd4_get_setattrstateid,
2542 },
2543 [OP_SETCLIENTID] = {
2544 .op_func = nfsd4_setclientid,
2545 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2546 | OP_MODIFIES_SOMETHING | OP_CACHEME
2547 | OP_NONTRIVIAL_ERROR_ENCODE,
2548 .op_name = "OP_SETCLIENTID",
2549 .op_rsize_bop = nfsd4_setclientid_rsize,
2550 },
2551 [OP_SETCLIENTID_CONFIRM] = {
2552 .op_func = nfsd4_setclientid_confirm,
2553 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2554 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2555 .op_name = "OP_SETCLIENTID_CONFIRM",
2556 .op_rsize_bop = nfsd4_only_status_rsize,
2557 },
2558 [OP_VERIFY] = {
2559 .op_func = nfsd4_verify,
2560 .op_name = "OP_VERIFY",
2561 .op_rsize_bop = nfsd4_only_status_rsize,
2562 },
2563 [OP_WRITE] = {
2564 .op_func = nfsd4_write,
2565 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2566 .op_name = "OP_WRITE",
2567 .op_rsize_bop = nfsd4_write_rsize,
2568 .op_get_currentstateid = nfsd4_get_writestateid,
2569 },
2570 [OP_RELEASE_LOCKOWNER] = {
2571 .op_func = nfsd4_release_lockowner,
2572 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2573 | OP_MODIFIES_SOMETHING,
2574 .op_name = "OP_RELEASE_LOCKOWNER",
2575 .op_rsize_bop = nfsd4_only_status_rsize,
2576 },
2577
2578
2579 [OP_EXCHANGE_ID] = {
2580 .op_func = nfsd4_exchange_id,
2581 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2582 | OP_MODIFIES_SOMETHING,
2583 .op_name = "OP_EXCHANGE_ID",
2584 .op_rsize_bop = nfsd4_exchange_id_rsize,
2585 },
2586 [OP_BACKCHANNEL_CTL] = {
2587 .op_func = nfsd4_backchannel_ctl,
2588 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2589 .op_name = "OP_BACKCHANNEL_CTL",
2590 .op_rsize_bop = nfsd4_only_status_rsize,
2591 },
2592 [OP_BIND_CONN_TO_SESSION] = {
2593 .op_func = nfsd4_bind_conn_to_session,
2594 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2595 | OP_MODIFIES_SOMETHING,
2596 .op_name = "OP_BIND_CONN_TO_SESSION",
2597 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2598 },
2599 [OP_CREATE_SESSION] = {
2600 .op_func = nfsd4_create_session,
2601 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2602 | OP_MODIFIES_SOMETHING,
2603 .op_name = "OP_CREATE_SESSION",
2604 .op_rsize_bop = nfsd4_create_session_rsize,
2605 },
2606 [OP_DESTROY_SESSION] = {
2607 .op_func = nfsd4_destroy_session,
2608 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2609 | OP_MODIFIES_SOMETHING,
2610 .op_name = "OP_DESTROY_SESSION",
2611 .op_rsize_bop = nfsd4_only_status_rsize,
2612 },
2613 [OP_SEQUENCE] = {
2614 .op_func = nfsd4_sequence,
2615 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2616 .op_name = "OP_SEQUENCE",
2617 .op_rsize_bop = nfsd4_sequence_rsize,
2618 },
2619 [OP_DESTROY_CLIENTID] = {
2620 .op_func = nfsd4_destroy_clientid,
2621 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2622 | OP_MODIFIES_SOMETHING,
2623 .op_name = "OP_DESTROY_CLIENTID",
2624 .op_rsize_bop = nfsd4_only_status_rsize,
2625 },
2626 [OP_RECLAIM_COMPLETE] = {
2627 .op_func = nfsd4_reclaim_complete,
2628 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2629 .op_name = "OP_RECLAIM_COMPLETE",
2630 .op_rsize_bop = nfsd4_only_status_rsize,
2631 },
2632 [OP_SECINFO_NO_NAME] = {
2633 .op_func = nfsd4_secinfo_no_name,
2634 .op_release = nfsd4_secinfo_no_name_release,
2635 .op_flags = OP_HANDLES_WRONGSEC,
2636 .op_name = "OP_SECINFO_NO_NAME",
2637 .op_rsize_bop = nfsd4_secinfo_rsize,
2638 },
2639 [OP_TEST_STATEID] = {
2640 .op_func = nfsd4_test_stateid,
2641 .op_flags = ALLOWED_WITHOUT_FH,
2642 .op_name = "OP_TEST_STATEID",
2643 .op_rsize_bop = nfsd4_test_stateid_rsize,
2644 },
2645 [OP_FREE_STATEID] = {
2646 .op_func = nfsd4_free_stateid,
2647 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2648 .op_name = "OP_FREE_STATEID",
2649 .op_get_currentstateid = nfsd4_get_freestateid,
2650 .op_rsize_bop = nfsd4_only_status_rsize,
2651 },
2652#ifdef CONFIG_NFSD_PNFS
2653 [OP_GETDEVICEINFO] = {
2654 .op_func = nfsd4_getdeviceinfo,
2655 .op_release = nfsd4_getdeviceinfo_release,
2656 .op_flags = ALLOWED_WITHOUT_FH,
2657 .op_name = "OP_GETDEVICEINFO",
2658 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2659 },
2660 [OP_LAYOUTGET] = {
2661 .op_func = nfsd4_layoutget,
2662 .op_release = nfsd4_layoutget_release,
2663 .op_flags = OP_MODIFIES_SOMETHING,
2664 .op_name = "OP_LAYOUTGET",
2665 .op_rsize_bop = nfsd4_layoutget_rsize,
2666 },
2667 [OP_LAYOUTCOMMIT] = {
2668 .op_func = nfsd4_layoutcommit,
2669 .op_flags = OP_MODIFIES_SOMETHING,
2670 .op_name = "OP_LAYOUTCOMMIT",
2671 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2672 },
2673 [OP_LAYOUTRETURN] = {
2674 .op_func = nfsd4_layoutreturn,
2675 .op_flags = OP_MODIFIES_SOMETHING,
2676 .op_name = "OP_LAYOUTRETURN",
2677 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2678 },
2679#endif
2680
2681
2682 [OP_ALLOCATE] = {
2683 .op_func = nfsd4_allocate,
2684 .op_flags = OP_MODIFIES_SOMETHING,
2685 .op_name = "OP_ALLOCATE",
2686 .op_rsize_bop = nfsd4_only_status_rsize,
2687 },
2688 [OP_DEALLOCATE] = {
2689 .op_func = nfsd4_deallocate,
2690 .op_flags = OP_MODIFIES_SOMETHING,
2691 .op_name = "OP_DEALLOCATE",
2692 .op_rsize_bop = nfsd4_only_status_rsize,
2693 },
2694 [OP_CLONE] = {
2695 .op_func = nfsd4_clone,
2696 .op_flags = OP_MODIFIES_SOMETHING,
2697 .op_name = "OP_CLONE",
2698 .op_rsize_bop = nfsd4_only_status_rsize,
2699 },
2700 [OP_COPY] = {
2701 .op_func = nfsd4_copy,
2702 .op_flags = OP_MODIFIES_SOMETHING,
2703 .op_name = "OP_COPY",
2704 .op_rsize_bop = nfsd4_copy_rsize,
2705 },
2706 [OP_SEEK] = {
2707 .op_func = nfsd4_seek,
2708 .op_name = "OP_SEEK",
2709 .op_rsize_bop = nfsd4_seek_rsize,
2710 },
2711 [OP_OFFLOAD_STATUS] = {
2712 .op_func = nfsd4_offload_status,
2713 .op_name = "OP_OFFLOAD_STATUS",
2714 .op_rsize_bop = nfsd4_offload_status_rsize,
2715 },
2716 [OP_OFFLOAD_CANCEL] = {
2717 .op_func = nfsd4_offload_cancel,
2718 .op_flags = OP_MODIFIES_SOMETHING,
2719 .op_name = "OP_OFFLOAD_CANCEL",
2720 .op_rsize_bop = nfsd4_only_status_rsize,
2721 },
2722};
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2735{
2736 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2737 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2738 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2739 struct nfsd4_compound_state *cstate = &resp->cstate;
2740 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2741 u32 opiter;
2742
2743 if (!cstate->minorversion)
2744 return false;
2745
2746 if (cstate->spo_must_allowed == true)
2747 return true;
2748
2749 opiter = resp->opcnt;
2750 while (opiter < argp->opcnt) {
2751 this = &argp->ops[opiter++];
2752 if (test_bit(this->opnum, allow->u.longs) &&
2753 cstate->clp->cl_mach_cred &&
2754 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2755 cstate->spo_must_allowed = true;
2756 return true;
2757 }
2758 }
2759 cstate->spo_must_allowed = false;
2760 return false;
2761}
2762
2763int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2764{
2765 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2766 return op_encode_hdr_size * sizeof(__be32);
2767
2768 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2769 return OPDESC(op)->op_rsize_bop(rqstp, op);
2770}
2771
2772void warn_on_nonidempotent_op(struct nfsd4_op *op)
2773{
2774 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2775 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2776 op->opnum, nfsd4_op_name(op->opnum));
2777 WARN_ON_ONCE(1);
2778 }
2779}
2780
2781static const char *nfsd4_op_name(unsigned opnum)
2782{
2783 if (opnum < ARRAY_SIZE(nfsd4_ops))
2784 return nfsd4_ops[opnum].op_name;
2785 return "unknown_operation";
2786}
2787
2788#define nfsd4_voidres nfsd4_voidargs
2789struct nfsd4_voidargs { int dummy; };
2790
2791static const struct svc_procedure nfsd_procedures4[2] = {
2792 [NFSPROC4_NULL] = {
2793 .pc_func = nfsd4_proc_null,
2794 .pc_encode = nfs4svc_encode_voidres,
2795 .pc_argsize = sizeof(struct nfsd4_voidargs),
2796 .pc_ressize = sizeof(struct nfsd4_voidres),
2797 .pc_cachetype = RC_NOCACHE,
2798 .pc_xdrressize = 1,
2799 },
2800 [NFSPROC4_COMPOUND] = {
2801 .pc_func = nfsd4_proc_compound,
2802 .pc_decode = nfs4svc_decode_compoundargs,
2803 .pc_encode = nfs4svc_encode_compoundres,
2804 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2805 .pc_ressize = sizeof(struct nfsd4_compoundres),
2806 .pc_release = nfsd4_release_compoundargs,
2807 .pc_cachetype = RC_NOCACHE,
2808 .pc_xdrressize = NFSD_BUFSIZE/4,
2809 },
2810};
2811
2812static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2813const struct svc_version nfsd_version4 = {
2814 .vs_vers = 4,
2815 .vs_nproc = 2,
2816 .vs_proc = nfsd_procedures4,
2817 .vs_count = nfsd_count3,
2818 .vs_dispatch = nfsd_dispatch,
2819 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2820 .vs_rpcb_optnl = true,
2821 .vs_need_cong_ctrl = true,
2822};
2823
2824
2825
2826
2827
2828
2829