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35#include <linux/file.h>
36#include <linux/falloc.h>
37#include <linux/slab.h>
38
39#include "idmap.h"
40#include "cache.h"
41#include "xdr4.h"
42#include "vfs.h"
43#include "current_stateid.h"
44#include "netns.h"
45#include "acl.h"
46#include "pnfs.h"
47#include "trace.h"
48
49#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50#include <linux/security.h>
51
52static inline void
53nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
54{
55 struct inode *inode = d_inode(resfh->fh_dentry);
56 int status;
57
58 inode_lock(inode);
59 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
61 inode_unlock(inode);
62
63 if (status)
64
65
66
67
68
69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
70
71 return;
72}
73#else
74static inline void
75nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
76{ }
77#endif
78
79#define NFSDDBG_FACILITY NFSDDBG_PROC
80
81static u32 nfsd_attrmask[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0,
83 NFSD_WRITEABLE_ATTRS_WORD1,
84 NFSD_WRITEABLE_ATTRS_WORD2
85};
86
87static u32 nfsd41_ex_attrmask[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
91};
92
93static __be32
94check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
95 u32 *bmval, u32 *writable)
96{
97 struct dentry *dentry = cstate->current_fh.fh_dentry;
98 struct svc_export *exp = cstate->current_fh.fh_export;
99
100 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
101 return nfserr_attrnotsupp;
102 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
103 return nfserr_attrnotsupp;
104 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
105 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
106 return nfserr_attrnotsupp;
107 if (writable && !bmval_is_subset(bmval, writable))
108 return nfserr_inval;
109 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
110 (bmval[1] & FATTR4_WORD1_MODE))
111 return nfserr_inval;
112 return nfs_ok;
113}
114
115static __be32
116nfsd4_check_open_attributes(struct svc_rqst *rqstp,
117 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
118{
119 __be32 status = nfs_ok;
120
121 if (open->op_create == NFS4_OPEN_CREATE) {
122 if (open->op_createmode == NFS4_CREATE_UNCHECKED
123 || open->op_createmode == NFS4_CREATE_GUARDED)
124 status = check_attr_support(rqstp, cstate,
125 open->op_bmval, nfsd_attrmask);
126 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd41_ex_attrmask);
129 }
130
131 return status;
132}
133
134static int
135is_create_with_attrs(struct nfsd4_open *open)
136{
137 return open->op_create == NFS4_OPEN_CREATE
138 && (open->op_createmode == NFS4_CREATE_UNCHECKED
139 || open->op_createmode == NFS4_CREATE_GUARDED
140 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
141}
142
143
144
145
146
147static void
148do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
149 struct nfs4_acl *acl, u32 *bmval)
150{
151 __be32 status;
152
153 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
154 if (status)
155
156
157
158
159
160 bmval[0] &= ~FATTR4_WORD0_ACL;
161}
162
163static inline void
164fh_dup2(struct svc_fh *dst, struct svc_fh *src)
165{
166 fh_put(dst);
167 dget(src->fh_dentry);
168 if (src->fh_export)
169 exp_get(src->fh_export);
170 *dst = *src;
171}
172
173static __be32
174do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
175{
176 __be32 status;
177
178 if (open->op_truncate &&
179 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
180 return nfserr_inval;
181
182 accmode |= NFSD_MAY_READ_IF_EXEC;
183
184 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
185 accmode |= NFSD_MAY_READ;
186 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
187 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
188 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
189 accmode |= NFSD_MAY_WRITE;
190
191 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
192
193 return status;
194}
195
196static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
197{
198 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
199
200 if (S_ISREG(mode))
201 return nfs_ok;
202 if (S_ISDIR(mode))
203 return nfserr_isdir;
204
205
206
207
208
209
210
211 return nfserr_symlink;
212}
213
214static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
215{
216 if (nfsd4_has_session(cstate))
217 return;
218 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
219 &resfh->fh_handle);
220}
221
222static __be32
223do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
224{
225 struct svc_fh *current_fh = &cstate->current_fh;
226 int accmode;
227 __be32 status;
228
229 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
230 if (!*resfh)
231 return nfserr_jukebox;
232 fh_init(*resfh, NFS4_FHSIZE);
233 open->op_truncate = 0;
234
235 if (open->op_create) {
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
256 open->op_fname.len, &open->op_iattr,
257 *resfh, open->op_createmode,
258 (u32 *)open->op_verf.data,
259 &open->op_truncate, &open->op_created);
260
261 if (!status && open->op_label.len)
262 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
263
264
265
266
267
268
269 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
270 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
271 FATTR4_WORD1_TIME_MODIFY);
272 } else
273
274
275
276
277
278
279 status = nfsd_lookup(rqstp, current_fh,
280 open->op_fname.data, open->op_fname.len, *resfh);
281 if (status)
282 goto out;
283 status = nfsd_check_obj_isreg(*resfh);
284 if (status)
285 goto out;
286
287 if (is_create_with_attrs(open) && open->op_acl != NULL)
288 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
289
290 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
291 accmode = NFSD_MAY_NOP;
292 if (open->op_created ||
293 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
294 accmode |= NFSD_MAY_OWNER_OVERRIDE;
295 status = do_open_permission(rqstp, *resfh, open, accmode);
296 set_change_info(&open->op_cinfo, current_fh);
297out:
298 return status;
299}
300
301static __be32
302do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
303{
304 struct svc_fh *current_fh = &cstate->current_fh;
305 __be32 status;
306 int accmode = 0;
307
308
309
310
311
312 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
313
314 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
315
316 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
317 (open->op_iattr.ia_size == 0);
318
319
320
321
322
323
324
325
326
327 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
328 accmode = NFSD_MAY_OWNER_OVERRIDE;
329
330 status = do_open_permission(rqstp, current_fh, open, accmode);
331
332 return status;
333}
334
335static void
336copy_clientid(clientid_t *clid, struct nfsd4_session *session)
337{
338 struct nfsd4_sessionid *sid =
339 (struct nfsd4_sessionid *)session->se_sessionid.data;
340
341 clid->cl_boot = sid->clientid.cl_boot;
342 clid->cl_id = sid->clientid.cl_id;
343}
344
345static __be32
346nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
347 union nfsd4_op_u *u)
348{
349 struct nfsd4_open *open = &u->open;
350 __be32 status;
351 struct svc_fh *resfh = NULL;
352 struct net *net = SVC_NET(rqstp);
353 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
354
355 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
356 (int)open->op_fname.len, open->op_fname.data,
357 open->op_openowner);
358
359
360 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
361 return nfserr_inval;
362
363 open->op_created = 0;
364
365
366
367
368 if (nfsd4_has_session(cstate) &&
369 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
370 &cstate->session->se_client->cl_flags) &&
371 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
372 return nfserr_grace;
373
374 if (nfsd4_has_session(cstate))
375 copy_clientid(&open->op_clientid, cstate->session);
376
377
378 status = nfsd4_process_open1(cstate, open, nn);
379 if (status == nfserr_replay_me) {
380 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
381 fh_put(&cstate->current_fh);
382 fh_copy_shallow(&cstate->current_fh.fh_handle,
383 &rp->rp_openfh);
384 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
385 if (status)
386 dprintk("nfsd4_open: replay failed"
387 " restoring previous filehandle\n");
388 else
389 status = nfserr_replay_me;
390 }
391 if (status)
392 goto out;
393 if (open->op_xdr_error) {
394 status = open->op_xdr_error;
395 goto out;
396 }
397
398 status = nfsd4_check_open_attributes(rqstp, cstate, open);
399 if (status)
400 goto out;
401
402
403
404 status = nfserr_grace;
405 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
406 goto out;
407 status = nfserr_no_grace;
408 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
409 goto out;
410
411 switch (open->op_claim_type) {
412 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
413 case NFS4_OPEN_CLAIM_NULL:
414 status = do_open_lookup(rqstp, cstate, open, &resfh);
415 if (status)
416 goto out;
417 break;
418 case NFS4_OPEN_CLAIM_PREVIOUS:
419 status = nfs4_check_open_reclaim(&open->op_clientid,
420 cstate, nn);
421 if (status)
422 goto out;
423 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
424 case NFS4_OPEN_CLAIM_FH:
425 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
426 status = do_open_fhandle(rqstp, cstate, open);
427 if (status)
428 goto out;
429 resfh = &cstate->current_fh;
430 break;
431 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
432 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
433 dprintk("NFSD: unsupported OPEN claim type %d\n",
434 open->op_claim_type);
435 status = nfserr_notsupp;
436 goto out;
437 default:
438 dprintk("NFSD: Invalid OPEN claim type %d\n",
439 open->op_claim_type);
440 status = nfserr_inval;
441 goto out;
442 }
443
444
445
446
447
448 status = nfsd4_process_open2(rqstp, resfh, open);
449 WARN(status && open->op_created,
450 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
451 be32_to_cpu(status));
452out:
453 if (resfh && resfh != &cstate->current_fh) {
454 fh_dup2(&cstate->current_fh, resfh);
455 fh_put(resfh);
456 kfree(resfh);
457 }
458 nfsd4_cleanup_open_state(cstate, open);
459 nfsd4_bump_seqid(cstate, status);
460 return status;
461}
462
463
464
465
466
467
468
469static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
470{
471 struct nfsd4_open *open = &op->u.open;
472
473 if (!seqid_mutating_err(ntohl(op->status)))
474 return op->status;
475 if (nfsd4_has_session(cstate))
476 return op->status;
477 open->op_xdr_error = op->status;
478 return nfsd4_open(rqstp, cstate, &op->u);
479}
480
481
482
483
484static __be32
485nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
486 union nfsd4_op_u *u)
487{
488 if (!cstate->current_fh.fh_dentry)
489 return nfserr_nofilehandle;
490
491 u->getfh = &cstate->current_fh;
492 return nfs_ok;
493}
494
495static __be32
496nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
497 union nfsd4_op_u *u)
498{
499 struct nfsd4_putfh *putfh = &u->putfh;
500
501 fh_put(&cstate->current_fh);
502 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
503 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
504 putfh->pf_fhlen);
505 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
506}
507
508static __be32
509nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
510 union nfsd4_op_u *u)
511{
512 __be32 status;
513
514 fh_put(&cstate->current_fh);
515 status = exp_pseudoroot(rqstp, &cstate->current_fh);
516 return status;
517}
518
519static __be32
520nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
521 union nfsd4_op_u *u)
522{
523 if (!cstate->save_fh.fh_dentry)
524 return nfserr_restorefh;
525
526 fh_dup2(&cstate->current_fh, &cstate->save_fh);
527 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
528 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
529 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
530 }
531 return nfs_ok;
532}
533
534static __be32
535nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
536 union nfsd4_op_u *u)
537{
538 if (!cstate->current_fh.fh_dentry)
539 return nfserr_nofilehandle;
540
541 fh_dup2(&cstate->save_fh, &cstate->current_fh);
542 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
543 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
544 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
545 }
546 return nfs_ok;
547}
548
549
550
551
552static __be32
553nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
554 union nfsd4_op_u *u)
555{
556 struct nfsd4_access *access = &u->access;
557
558 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
559 return nfserr_inval;
560
561 access->ac_resp_access = access->ac_req_access;
562 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
563 &access->ac_supported);
564}
565
566static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
567{
568 __be32 verf[2];
569 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
570
571
572
573
574
575 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
576 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
577 memcpy(verifier->data, verf, sizeof(verifier->data));
578}
579
580static __be32
581nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 union nfsd4_op_u *u)
583{
584 struct nfsd4_commit *commit = &u->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 union nfsd4_op_u *u)
594{
595 struct nfsd4_create *create = &u->create;
596 struct svc_fh resfh;
597 __be32 status;
598 dev_t rdev;
599
600 fh_init(&resfh, NFS4_FHSIZE);
601
602 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
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 status = nfsd_symlink(rqstp, &cstate->current_fh,
614 create->cr_name, create->cr_namelen,
615 create->cr_data, &resfh);
616 break;
617
618 case NF4BLK:
619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
620 if (MAJOR(rdev) != create->cr_specdata1 ||
621 MINOR(rdev) != create->cr_specdata2)
622 return nfserr_inval;
623 status = nfsd_create(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 &create->cr_iattr, S_IFBLK, rdev, &resfh);
626 break;
627
628 case NF4CHR:
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_IFCHR, rdev, &resfh);
636 break;
637
638 case NF4SOCK:
639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr, S_IFSOCK, 0, &resfh);
642 break;
643
644 case NF4FIFO:
645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFIFO, 0, &resfh);
648 break;
649
650 case NF4DIR:
651 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
652 status = nfsd_create(rqstp, &cstate->current_fh,
653 create->cr_name, create->cr_namelen,
654 &create->cr_iattr, S_IFDIR, 0, &resfh);
655 break;
656
657 default:
658 status = nfserr_badtype;
659 }
660
661 if (status)
662 goto out;
663
664 if (create->cr_label.len)
665 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
666
667 if (create->cr_acl != NULL)
668 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
669 create->cr_bmval);
670
671 fh_unlock(&cstate->current_fh);
672 set_change_info(&create->cr_cinfo, &cstate->current_fh);
673 fh_dup2(&cstate->current_fh, &resfh);
674out:
675 fh_put(&resfh);
676 return status;
677}
678
679static __be32
680nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
681 union nfsd4_op_u *u)
682{
683 struct nfsd4_getattr *getattr = &u->getattr;
684 __be32 status;
685
686 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
687 if (status)
688 return status;
689
690 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
691 return nfserr_inval;
692
693 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
694 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
695 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
696
697 getattr->ga_fhp = &cstate->current_fh;
698 return nfs_ok;
699}
700
701static __be32
702nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
703 union nfsd4_op_u *u)
704{
705 struct nfsd4_link *link = &u->link;
706 __be32 status = nfserr_nofilehandle;
707
708 if (!cstate->save_fh.fh_dentry)
709 return status;
710 status = nfsd_link(rqstp, &cstate->current_fh,
711 link->li_name, link->li_namelen, &cstate->save_fh);
712 if (!status)
713 set_change_info(&link->li_cinfo, &cstate->current_fh);
714 return status;
715}
716
717static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
718{
719 struct svc_fh tmp_fh;
720 __be32 ret;
721
722 fh_init(&tmp_fh, NFS4_FHSIZE);
723 ret = exp_pseudoroot(rqstp, &tmp_fh);
724 if (ret)
725 return ret;
726 if (tmp_fh.fh_dentry == fh->fh_dentry) {
727 fh_put(&tmp_fh);
728 return nfserr_noent;
729 }
730 fh_put(&tmp_fh);
731 return nfsd_lookup(rqstp, fh, "..", 2, fh);
732}
733
734static __be32
735nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
736 union nfsd4_op_u *u)
737{
738 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
739}
740
741static __be32
742nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
743 union nfsd4_op_u *u)
744{
745 return nfsd_lookup(rqstp, &cstate->current_fh,
746 u->lookup.lo_name, u->lookup.lo_len,
747 &cstate->current_fh);
748}
749
750static __be32
751nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 union nfsd4_op_u *u)
753{
754 struct nfsd4_read *read = &u->read;
755 __be32 status;
756
757 read->rd_filp = NULL;
758 if (read->rd_offset >= OFFSET_MAX)
759 return nfserr_inval;
760
761
762
763
764
765
766
767
768
769 if (!nfsd4_last_compound_op(rqstp))
770 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
771
772
773 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
774 &read->rd_stateid, RD_STATE,
775 &read->rd_filp, &read->rd_tmp_file);
776 if (status) {
777 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
778 goto out;
779 }
780 status = nfs_ok;
781out:
782 read->rd_rqstp = rqstp;
783 read->rd_fhp = &cstate->current_fh;
784 return status;
785}
786
787static __be32
788nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
789 union nfsd4_op_u *u)
790{
791 struct nfsd4_readdir *readdir = &u->readdir;
792 u64 cookie = readdir->rd_cookie;
793 static const nfs4_verifier zeroverf;
794
795
796
797 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
798 return nfserr_inval;
799
800 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
801 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
802 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
803
804 if ((cookie == 1) || (cookie == 2) ||
805 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
806 return nfserr_bad_cookie;
807
808 readdir->rd_rqstp = rqstp;
809 readdir->rd_fhp = &cstate->current_fh;
810 return nfs_ok;
811}
812
813static __be32
814nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
815 union nfsd4_op_u *u)
816{
817 u->readlink.rl_rqstp = rqstp;
818 u->readlink.rl_fhp = &cstate->current_fh;
819 return nfs_ok;
820}
821
822static __be32
823nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
824 union nfsd4_op_u *u)
825{
826 struct nfsd4_remove *remove = &u->remove;
827 __be32 status;
828
829 if (opens_in_grace(SVC_NET(rqstp)))
830 return nfserr_grace;
831 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
832 remove->rm_name, remove->rm_namelen);
833 if (!status) {
834 fh_unlock(&cstate->current_fh);
835 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
836 }
837 return status;
838}
839
840static __be32
841nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
842 union nfsd4_op_u *u)
843{
844 struct nfsd4_rename *rename = &u->rename;
845 __be32 status = nfserr_nofilehandle;
846
847 if (!cstate->save_fh.fh_dentry)
848 return status;
849 if (opens_in_grace(SVC_NET(rqstp)) &&
850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
851 return nfserr_grace;
852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
853 rename->rn_snamelen, &cstate->current_fh,
854 rename->rn_tname, rename->rn_tnamelen);
855 if (status)
856 return status;
857 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
858 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
859 return nfs_ok;
860}
861
862static __be32
863nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 union nfsd4_op_u *u)
865{
866 struct nfsd4_secinfo *secinfo = &u->secinfo;
867 struct svc_export *exp;
868 struct dentry *dentry;
869 __be32 err;
870
871 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
872 if (err)
873 return err;
874 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
875 secinfo->si_name, secinfo->si_namelen,
876 &exp, &dentry);
877 if (err)
878 return err;
879 fh_unlock(&cstate->current_fh);
880 if (d_really_is_negative(dentry)) {
881 exp_put(exp);
882 err = nfserr_noent;
883 } else
884 secinfo->si_exp = exp;
885 dput(dentry);
886 if (cstate->minorversion)
887
888 fh_put(&cstate->current_fh);
889 return err;
890}
891
892static __be32
893nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
894 union nfsd4_op_u *u)
895{
896 __be32 err;
897
898 switch (u->secinfo_no_name.sin_style) {
899 case NFS4_SECINFO_STYLE4_CURRENT_FH:
900 break;
901 case NFS4_SECINFO_STYLE4_PARENT:
902 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
903 if (err)
904 return err;
905 break;
906 default:
907 return nfserr_inval;
908 }
909
910 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
911 fh_put(&cstate->current_fh);
912 return nfs_ok;
913}
914
915static __be32
916nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
917 union nfsd4_op_u *u)
918{
919 struct nfsd4_setattr *setattr = &u->setattr;
920 __be32 status = nfs_ok;
921 int err;
922
923 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
924 status = nfs4_preprocess_stateid_op(rqstp, cstate,
925 &cstate->current_fh, &setattr->sa_stateid,
926 WR_STATE, NULL, NULL);
927 if (status) {
928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
929 return status;
930 }
931 }
932 err = fh_want_write(&cstate->current_fh);
933 if (err)
934 return nfserrno(err);
935 status = nfs_ok;
936
937 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
938 nfsd_attrmask);
939 if (status)
940 goto out;
941
942 if (setattr->sa_acl != NULL)
943 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
944 setattr->sa_acl);
945 if (status)
946 goto out;
947 if (setattr->sa_label.len)
948 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
949 &setattr->sa_label);
950 if (status)
951 goto out;
952 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
953 0, (time_t)0);
954out:
955 fh_drop_write(&cstate->current_fh);
956 return status;
957}
958
959static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
960{
961 int i = 1;
962 int buflen = write->wr_buflen;
963
964 vec[0].iov_base = write->wr_head.iov_base;
965 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
966 buflen -= vec[0].iov_len;
967
968 while (buflen) {
969 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
970 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
971 buflen -= vec[i].iov_len;
972 i++;
973 }
974 return i;
975}
976
977static __be32
978nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
979 union nfsd4_op_u *u)
980{
981 struct nfsd4_write *write = &u->write;
982 stateid_t *stateid = &write->wr_stateid;
983 struct file *filp = NULL;
984 __be32 status = nfs_ok;
985 unsigned long cnt;
986 int nvecs;
987
988 if (write->wr_offset >= OFFSET_MAX)
989 return nfserr_inval;
990
991 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
992 stateid, WR_STATE, &filp, NULL);
993 if (status) {
994 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
995 return status;
996 }
997
998 cnt = write->wr_buflen;
999 write->wr_how_written = write->wr_stable_how;
1000 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1001
1002 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1003 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1004
1005 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1006 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1007 write->wr_how_written);
1008 fput(filp);
1009
1010 write->wr_bytes_written = cnt;
1011
1012 return status;
1013}
1014
1015static __be32
1016nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1017 stateid_t *src_stateid, struct file **src,
1018 stateid_t *dst_stateid, struct file **dst)
1019{
1020 __be32 status;
1021
1022 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1023 src_stateid, RD_STATE, src, NULL);
1024 if (status) {
1025 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1026 goto out;
1027 }
1028
1029 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1030 dst_stateid, WR_STATE, dst, NULL);
1031 if (status) {
1032 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1033 goto out_put_src;
1034 }
1035
1036
1037 if (!S_ISREG(file_inode(*src)->i_mode) ||
1038 !S_ISREG(file_inode(*dst)->i_mode)) {
1039 status = nfserr_wrong_type;
1040 goto out_put_dst;
1041 }
1042
1043out:
1044 return status;
1045out_put_dst:
1046 fput(*dst);
1047out_put_src:
1048 fput(*src);
1049 goto out;
1050}
1051
1052static __be32
1053nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1054 union nfsd4_op_u *u)
1055{
1056 struct nfsd4_clone *clone = &u->clone;
1057 struct file *src, *dst;
1058 __be32 status;
1059
1060 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1061 &clone->cl_dst_stateid, &dst);
1062 if (status)
1063 goto out;
1064
1065 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1066 dst, clone->cl_dst_pos, clone->cl_count);
1067
1068 fput(dst);
1069 fput(src);
1070out:
1071 return status;
1072}
1073
1074static __be32
1075nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1076 union nfsd4_op_u *u)
1077{
1078 struct nfsd4_copy *copy = &u->copy;
1079 struct file *src, *dst;
1080 __be32 status;
1081 ssize_t bytes;
1082
1083 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1084 ©->cp_dst_stateid, &dst);
1085 if (status)
1086 goto out;
1087
1088 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1089 dst, copy->cp_dst_pos, copy->cp_count);
1090
1091 if (bytes < 0)
1092 status = nfserrno(bytes);
1093 else {
1094 copy->cp_res.wr_bytes_written = bytes;
1095 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1096 copy->cp_consecutive = 1;
1097 copy->cp_synchronous = 1;
1098 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1099 status = nfs_ok;
1100 }
1101
1102 fput(src);
1103 fput(dst);
1104out:
1105 return status;
1106}
1107
1108static __be32
1109nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1110 struct nfsd4_fallocate *fallocate, int flags)
1111{
1112 __be32 status = nfserr_notsupp;
1113 struct file *file;
1114
1115 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1116 &fallocate->falloc_stateid,
1117 WR_STATE, &file, NULL);
1118 if (status != nfs_ok) {
1119 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1120 return status;
1121 }
1122
1123 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1124 fallocate->falloc_offset,
1125 fallocate->falloc_length,
1126 flags);
1127 fput(file);
1128 return status;
1129}
1130
1131static __be32
1132nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1133 union nfsd4_op_u *u)
1134{
1135 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1136}
1137
1138static __be32
1139nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1140 union nfsd4_op_u *u)
1141{
1142 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1143 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1144}
1145
1146static __be32
1147nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1148 union nfsd4_op_u *u)
1149{
1150 struct nfsd4_seek *seek = &u->seek;
1151 int whence;
1152 __be32 status;
1153 struct file *file;
1154
1155 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1156 &seek->seek_stateid,
1157 RD_STATE, &file, NULL);
1158 if (status) {
1159 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1160 return status;
1161 }
1162
1163 switch (seek->seek_whence) {
1164 case NFS4_CONTENT_DATA:
1165 whence = SEEK_DATA;
1166 break;
1167 case NFS4_CONTENT_HOLE:
1168 whence = SEEK_HOLE;
1169 break;
1170 default:
1171 status = nfserr_union_notsupp;
1172 goto out;
1173 }
1174
1175
1176
1177
1178
1179 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1180 if (seek->seek_pos < 0)
1181 status = nfserrno(seek->seek_pos);
1182 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1183 seek->seek_eof = true;
1184
1185out:
1186 fput(file);
1187 return status;
1188}
1189
1190
1191
1192
1193
1194
1195static __be32
1196_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1197 struct nfsd4_verify *verify)
1198{
1199 __be32 *buf, *p;
1200 int count;
1201 __be32 status;
1202
1203 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1204 if (status)
1205 return status;
1206
1207 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1208 if (status)
1209 return status;
1210
1211 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1212 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1213 return nfserr_inval;
1214 if (verify->ve_attrlen & 3)
1215 return nfserr_inval;
1216
1217
1218
1219
1220 count = 4 + (verify->ve_attrlen >> 2);
1221 buf = kmalloc(count << 2, GFP_KERNEL);
1222 if (!buf)
1223 return nfserr_jukebox;
1224
1225 p = buf;
1226 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1227 cstate->current_fh.fh_export,
1228 cstate->current_fh.fh_dentry,
1229 verify->ve_bmval,
1230 rqstp, 0);
1231
1232
1233
1234
1235 if (status == nfserr_resource)
1236 status = nfserr_not_same;
1237 if (status)
1238 goto out_kfree;
1239
1240
1241 p = buf + 1 + ntohl(buf[0]);
1242 status = nfserr_not_same;
1243 if (ntohl(*p++) != verify->ve_attrlen)
1244 goto out_kfree;
1245 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1246 status = nfserr_same;
1247
1248out_kfree:
1249 kfree(buf);
1250 return status;
1251}
1252
1253static __be32
1254nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1255 union nfsd4_op_u *u)
1256{
1257 __be32 status;
1258
1259 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1260 return status == nfserr_not_same ? nfs_ok : status;
1261}
1262
1263static __be32
1264nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1265 union nfsd4_op_u *u)
1266{
1267 __be32 status;
1268
1269 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1270 return status == nfserr_same ? nfs_ok : status;
1271}
1272
1273#ifdef CONFIG_NFSD_PNFS
1274static const struct nfsd4_layout_ops *
1275nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1276{
1277 if (!exp->ex_layout_types) {
1278 dprintk("%s: export does not support pNFS\n", __func__);
1279 return NULL;
1280 }
1281
1282 if (layout_type >= LAYOUT_TYPE_MAX ||
1283 !(exp->ex_layout_types & (1 << layout_type))) {
1284 dprintk("%s: layout type %d not supported\n",
1285 __func__, layout_type);
1286 return NULL;
1287 }
1288
1289 return nfsd4_layout_ops[layout_type];
1290}
1291
1292static __be32
1293nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1294 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1295{
1296 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1297 const struct nfsd4_layout_ops *ops;
1298 struct nfsd4_deviceid_map *map;
1299 struct svc_export *exp;
1300 __be32 nfserr;
1301
1302 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1303 __func__,
1304 gdp->gd_layout_type,
1305 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1306 gdp->gd_maxcount);
1307
1308 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1309 if (!map) {
1310 dprintk("%s: couldn't find device ID to export mapping!\n",
1311 __func__);
1312 return nfserr_noent;
1313 }
1314
1315 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1316 if (IS_ERR(exp)) {
1317 dprintk("%s: could not find device id\n", __func__);
1318 return nfserr_noent;
1319 }
1320
1321 nfserr = nfserr_layoutunavailable;
1322 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1323 if (!ops)
1324 goto out;
1325
1326 nfserr = nfs_ok;
1327 if (gdp->gd_maxcount != 0) {
1328 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1329 rqstp, cstate->session->se_client, gdp);
1330 }
1331
1332 gdp->gd_notify_types &= ops->notify_types;
1333out:
1334 exp_put(exp);
1335 return nfserr;
1336}
1337
1338static __be32
1339nfsd4_layoutget(struct svc_rqst *rqstp,
1340 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1341{
1342 struct nfsd4_layoutget *lgp = &u->layoutget;
1343 struct svc_fh *current_fh = &cstate->current_fh;
1344 const struct nfsd4_layout_ops *ops;
1345 struct nfs4_layout_stateid *ls;
1346 __be32 nfserr;
1347 int accmode;
1348
1349 switch (lgp->lg_seg.iomode) {
1350 case IOMODE_READ:
1351 accmode = NFSD_MAY_READ;
1352 break;
1353 case IOMODE_RW:
1354 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1355 break;
1356 default:
1357 dprintk("%s: invalid iomode %d\n",
1358 __func__, lgp->lg_seg.iomode);
1359 nfserr = nfserr_badiomode;
1360 goto out;
1361 }
1362
1363 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1364 if (nfserr)
1365 goto out;
1366
1367 nfserr = nfserr_layoutunavailable;
1368 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1369 if (!ops)
1370 goto out;
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383 nfserr = nfserr_inval;
1384 if (lgp->lg_seg.length < lgp->lg_minlength ||
1385 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1386 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1387 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1388 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1389 goto out;
1390 if (lgp->lg_seg.length == 0)
1391 goto out;
1392
1393 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1394 true, lgp->lg_layout_type, &ls);
1395 if (nfserr) {
1396 trace_layout_get_lookup_fail(&lgp->lg_sid);
1397 goto out;
1398 }
1399
1400 nfserr = nfserr_recallconflict;
1401 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1402 goto out_put_stid;
1403
1404 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1405 current_fh, lgp);
1406 if (nfserr)
1407 goto out_put_stid;
1408
1409 nfserr = nfsd4_insert_layout(lgp, ls);
1410
1411out_put_stid:
1412 mutex_unlock(&ls->ls_mutex);
1413 nfs4_put_stid(&ls->ls_stid);
1414out:
1415 return nfserr;
1416}
1417
1418static __be32
1419nfsd4_layoutcommit(struct svc_rqst *rqstp,
1420 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1421{
1422 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1423 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1424 struct svc_fh *current_fh = &cstate->current_fh;
1425 const struct nfsd4_layout_ops *ops;
1426 loff_t new_size = lcp->lc_last_wr + 1;
1427 struct inode *inode;
1428 struct nfs4_layout_stateid *ls;
1429 __be32 nfserr;
1430
1431 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1432 if (nfserr)
1433 goto out;
1434
1435 nfserr = nfserr_layoutunavailable;
1436 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1437 if (!ops)
1438 goto out;
1439 inode = d_inode(current_fh->fh_dentry);
1440
1441 nfserr = nfserr_inval;
1442 if (new_size <= seg->offset) {
1443 dprintk("pnfsd: last write before layout segment\n");
1444 goto out;
1445 }
1446 if (new_size > seg->offset + seg->length) {
1447 dprintk("pnfsd: last write beyond layout segment\n");
1448 goto out;
1449 }
1450 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1451 dprintk("pnfsd: layoutcommit beyond EOF\n");
1452 goto out;
1453 }
1454
1455 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1456 false, lcp->lc_layout_type,
1457 &ls);
1458 if (nfserr) {
1459 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1460
1461 if (nfserr == nfserr_bad_stateid)
1462 nfserr = nfserr_badlayout;
1463 goto out;
1464 }
1465
1466
1467 mutex_unlock(&ls->ls_mutex);
1468
1469 if (new_size > i_size_read(inode)) {
1470 lcp->lc_size_chg = 1;
1471 lcp->lc_newsize = new_size;
1472 } else {
1473 lcp->lc_size_chg = 0;
1474 }
1475
1476 nfserr = ops->proc_layoutcommit(inode, lcp);
1477 nfs4_put_stid(&ls->ls_stid);
1478out:
1479 return nfserr;
1480}
1481
1482static __be32
1483nfsd4_layoutreturn(struct svc_rqst *rqstp,
1484 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1485{
1486 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1487 struct svc_fh *current_fh = &cstate->current_fh;
1488 __be32 nfserr;
1489
1490 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1491 if (nfserr)
1492 goto out;
1493
1494 nfserr = nfserr_layoutunavailable;
1495 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1496 goto out;
1497
1498 switch (lrp->lr_seg.iomode) {
1499 case IOMODE_READ:
1500 case IOMODE_RW:
1501 case IOMODE_ANY:
1502 break;
1503 default:
1504 dprintk("%s: invalid iomode %d\n", __func__,
1505 lrp->lr_seg.iomode);
1506 nfserr = nfserr_inval;
1507 goto out;
1508 }
1509
1510 switch (lrp->lr_return_type) {
1511 case RETURN_FILE:
1512 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1513 break;
1514 case RETURN_FSID:
1515 case RETURN_ALL:
1516 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1517 break;
1518 default:
1519 dprintk("%s: invalid return_type %d\n", __func__,
1520 lrp->lr_return_type);
1521 nfserr = nfserr_inval;
1522 break;
1523 }
1524out:
1525 return nfserr;
1526}
1527#endif
1528
1529
1530
1531
1532static __be32
1533nfsd4_proc_null(struct svc_rqst *rqstp)
1534{
1535 return nfs_ok;
1536}
1537
1538static inline void nfsd4_increment_op_stats(u32 opnum)
1539{
1540 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1541 nfsdstats.nfs4_opcount[opnum]++;
1542}
1543
1544enum nfsd4_op_flags {
1545 ALLOWED_WITHOUT_FH = 1 << 0,
1546 ALLOWED_ON_ABSENT_FS = 1 << 1,
1547 ALLOWED_AS_FIRST_OP = 1 << 2,
1548
1549 OP_HANDLES_WRONGSEC = 1 << 3,
1550 OP_IS_PUTFH_LIKE = 1 << 4,
1551
1552
1553
1554
1555
1556
1557 OP_MODIFIES_SOMETHING = 1 << 5,
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567 OP_CACHEME = 1 << 6,
1568
1569
1570
1571 OP_CLEAR_STATEID = 1 << 7,
1572};
1573
1574struct nfsd4_operation {
1575 __be32 (*op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1576 union nfsd4_op_u *);
1577 u32 op_flags;
1578 char *op_name;
1579
1580 u32 (*op_rsize_bop)(struct svc_rqst *, struct nfsd4_op *);
1581 void (*op_get_currentstateid)(struct nfsd4_compound_state *,
1582 union nfsd4_op_u *);
1583 void (*op_set_currentstateid)(struct nfsd4_compound_state *,
1584 union nfsd4_op_u *);
1585};
1586
1587static const struct nfsd4_operation nfsd4_ops[];
1588
1589static const char *nfsd4_op_name(unsigned opnum);
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1604{
1605 struct nfsd4_op *op = &args->ops[0];
1606
1607
1608 if (args->minorversion == 0)
1609 return nfs_ok;
1610
1611 if (args->opcnt == 0)
1612 return nfs_ok;
1613 if (op->status == nfserr_op_illegal)
1614 return nfs_ok;
1615 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1616 return nfserr_op_not_in_session;
1617 if (op->opnum == OP_SEQUENCE)
1618 return nfs_ok;
1619 if (args->opcnt != 1)
1620 return nfserr_not_only_op;
1621 return nfs_ok;
1622}
1623
1624static inline const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1625{
1626 return &nfsd4_ops[op->opnum];
1627}
1628
1629bool nfsd4_cache_this_op(struct nfsd4_op *op)
1630{
1631 if (op->opnum == OP_ILLEGAL)
1632 return false;
1633 return OPDESC(op)->op_flags & OP_CACHEME;
1634}
1635
1636static bool need_wrongsec_check(struct svc_rqst *rqstp)
1637{
1638 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1639 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1640 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1641 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1642 const struct nfsd4_operation *thisd = OPDESC(this);
1643 const struct nfsd4_operation *nextd;
1644
1645
1646
1647
1648
1649 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1650 return false;
1651
1652
1653
1654
1655
1656 if (argp->opcnt == resp->opcnt)
1657 return false;
1658 if (next->opnum == OP_ILLEGAL)
1659 return false;
1660 nextd = OPDESC(next);
1661
1662
1663
1664
1665
1666 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1667}
1668
1669static void svcxdr_init_encode(struct svc_rqst *rqstp,
1670 struct nfsd4_compoundres *resp)
1671{
1672 struct xdr_stream *xdr = &resp->xdr;
1673 struct xdr_buf *buf = &rqstp->rq_res;
1674 struct kvec *head = buf->head;
1675
1676 xdr->buf = buf;
1677 xdr->iov = head;
1678 xdr->p = head->iov_base + head->iov_len;
1679 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1680
1681 buf->len = buf->head[0].iov_len;
1682 xdr->scratch.iov_len = 0;
1683 xdr->page_ptr = buf->pages - 1;
1684 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1685 - rqstp->rq_auth_slack;
1686}
1687
1688
1689
1690
1691static __be32
1692nfsd4_proc_compound(struct svc_rqst *rqstp)
1693{
1694 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1695 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1696 struct nfsd4_op *op;
1697 const struct nfsd4_operation *opdesc;
1698 struct nfsd4_compound_state *cstate = &resp->cstate;
1699 struct svc_fh *current_fh = &cstate->current_fh;
1700 struct svc_fh *save_fh = &cstate->save_fh;
1701 __be32 status;
1702
1703 svcxdr_init_encode(rqstp, resp);
1704 resp->tagp = resp->xdr.p;
1705
1706 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1707 resp->taglen = args->taglen;
1708 resp->tag = args->tag;
1709 resp->rqstp = rqstp;
1710 cstate->minorversion = args->minorversion;
1711 fh_init(current_fh, NFS4_FHSIZE);
1712 fh_init(save_fh, NFS4_FHSIZE);
1713
1714
1715
1716
1717 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1718
1719
1720
1721
1722 status = nfserr_minor_vers_mismatch;
1723 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1724 goto out;
1725
1726 status = nfs41_check_op_ordering(args);
1727 if (status) {
1728 op = &args->ops[0];
1729 op->status = status;
1730 goto encode_op;
1731 }
1732
1733 while (!status && resp->opcnt < args->opcnt) {
1734 op = &args->ops[resp->opcnt++];
1735
1736 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1737 resp->opcnt, args->opcnt, op->opnum,
1738 nfsd4_op_name(op->opnum));
1739
1740
1741
1742
1743
1744 if (op->status) {
1745 if (op->opnum == OP_OPEN)
1746 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1747 goto encode_op;
1748 }
1749
1750 opdesc = OPDESC(op);
1751
1752 if (!current_fh->fh_dentry) {
1753 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1754 op->status = nfserr_nofilehandle;
1755 goto encode_op;
1756 }
1757 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1758 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1759 op->status = nfserr_moved;
1760 goto encode_op;
1761 }
1762
1763 fh_clear_wcc(current_fh);
1764
1765
1766 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1767
1768
1769
1770
1771 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1772
1773
1774
1775
1776 if (resp->opcnt < args->opcnt)
1777 plen += COMPOUND_ERR_SLACK_SPACE;
1778 op->status = nfsd4_check_resp_size(resp, plen);
1779 }
1780
1781 if (op->status)
1782 goto encode_op;
1783
1784 if (opdesc->op_get_currentstateid)
1785 opdesc->op_get_currentstateid(cstate, &op->u);
1786 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1787
1788
1789 if (cstate->status == nfserr_replay_cache) {
1790 dprintk("%s NFS4.1 replay from cache\n", __func__);
1791 status = op->status;
1792 goto out;
1793 }
1794 if (!op->status) {
1795 if (opdesc->op_set_currentstateid)
1796 opdesc->op_set_currentstateid(cstate, &op->u);
1797
1798 if (opdesc->op_flags & OP_CLEAR_STATEID)
1799 clear_current_stateid(cstate);
1800
1801 if (need_wrongsec_check(rqstp))
1802 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1803 }
1804encode_op:
1805 if (op->status == nfserr_replay_me) {
1806 op->replay = &cstate->replay_owner->so_replay;
1807 nfsd4_encode_replay(&resp->xdr, op);
1808 status = op->status = op->replay->rp_status;
1809 } else {
1810 nfsd4_encode_operation(resp, op);
1811 status = op->status;
1812 }
1813
1814 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1815 args->ops, args->opcnt, resp->opcnt, op->opnum,
1816 be32_to_cpu(status));
1817
1818 nfsd4_cstate_clear_replay(cstate);
1819 nfsd4_increment_op_stats(op->opnum);
1820 }
1821
1822 cstate->status = status;
1823 fh_put(current_fh);
1824 fh_put(save_fh);
1825 BUG_ON(cstate->replay_owner);
1826out:
1827
1828 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1829 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1830 return status;
1831}
1832
1833#define op_encode_hdr_size (2)
1834#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1835#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1836#define op_encode_change_info_maxsz (5)
1837#define nfs4_fattr_bitmap_maxsz (4)
1838
1839
1840#define op_encode_lockowner_maxsz (0)
1841#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1842
1843#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1844
1845#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1846#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1847 op_encode_ace_maxsz)
1848
1849#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1850
1851static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1852{
1853 return (op_encode_hdr_size) * sizeof(__be32);
1854}
1855
1856static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1857{
1858 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1859}
1860
1861static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1862{
1863
1864 return (op_encode_hdr_size + 2)* sizeof(__be32);
1865}
1866
1867static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1868{
1869 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1870}
1871
1872static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1873{
1874 return (op_encode_hdr_size + op_encode_change_info_maxsz
1875 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1876}
1877
1878
1879
1880
1881
1882
1883static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1884 struct nfsd4_op *op)
1885{
1886 u32 *bmap = op->u.getattr.ga_bmval;
1887 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1888 u32 ret = 0;
1889
1890 if (bmap0 & FATTR4_WORD0_ACL)
1891 return svc_max_payload(rqstp);
1892 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1893 return svc_max_payload(rqstp);
1894
1895 if (bmap1 & FATTR4_WORD1_OWNER) {
1896 ret += IDMAP_NAMESZ + 4;
1897 bmap1 &= ~FATTR4_WORD1_OWNER;
1898 }
1899 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1900 ret += IDMAP_NAMESZ + 4;
1901 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1902 }
1903 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1904 ret += NFS4_FHSIZE + 4;
1905 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1906 }
1907 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1908 ret += NFS4_MAXLABELLEN + 12;
1909 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1910 }
1911
1912
1913
1914
1915 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1916
1917 ret += 20;
1918 return ret;
1919}
1920
1921static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1922{
1923 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1924}
1925
1926static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1927{
1928 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1929 * sizeof(__be32);
1930}
1931
1932static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1933{
1934 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1935 * sizeof(__be32);
1936}
1937
1938static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1939{
1940 return (op_encode_hdr_size + op_encode_stateid_maxsz
1941 + op_encode_change_info_maxsz + 1
1942 + nfs4_fattr_bitmap_maxsz
1943 + op_encode_delegation_maxsz) * sizeof(__be32);
1944}
1945
1946static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1947{
1948 u32 maxcount = 0, rlen = 0;
1949
1950 maxcount = svc_max_payload(rqstp);
1951 rlen = min(op->u.read.rd_length, maxcount);
1952
1953 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1954}
1955
1956static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1957{
1958 u32 maxcount = 0, rlen = 0;
1959
1960 maxcount = svc_max_payload(rqstp);
1961 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1962
1963 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1964 XDR_QUADLEN(rlen)) * sizeof(__be32);
1965}
1966
1967static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1968{
1969 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1970}
1971
1972static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1973{
1974 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1975 * sizeof(__be32);
1976}
1977
1978static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1979{
1980 return (op_encode_hdr_size + op_encode_change_info_maxsz
1981 + op_encode_change_info_maxsz) * sizeof(__be32);
1982}
1983
1984static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1985 struct nfsd4_op *op)
1986{
1987 return (op_encode_hdr_size
1988 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1989}
1990
1991static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1992{
1993 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1994 * sizeof(__be32);
1995}
1996
1997static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1998{
1999 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2000}
2001
2002static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2003{
2004 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2005 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2006}
2007
2008static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2009{
2010 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2011 sizeof(__be32);
2012}
2013
2014static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2015{
2016 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2017}
2018
2019static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size + 2 + 1 + \
2022 1 + 1 + \
2023 4 + \
2024 2 + \
2025 \
2026 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2027 \
2028 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2029 1 + \
2030 0 ) * sizeof(__be32);
2031}
2032
2033static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2034{
2035 return (op_encode_hdr_size + \
2036 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2037 2 ) * sizeof(__be32);
2038}
2039
2040static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2041{
2042 return (op_encode_hdr_size + \
2043 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2044 2 + \
2045 op_encode_channel_attrs_maxsz + \
2046 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2047}
2048
2049static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2050{
2051 return (op_encode_hdr_size +
2052 1 +
2053 op_encode_stateid_maxsz +
2054 2 +
2055 1 +
2056 op_encode_verifier_maxsz +
2057 1 +
2058 1 ) * sizeof(__be32);
2059}
2060
2061#ifdef CONFIG_NFSD_PNFS
2062static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2063{
2064 u32 maxcount = 0, rlen = 0;
2065
2066 maxcount = svc_max_payload(rqstp);
2067 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2068
2069 return (op_encode_hdr_size +
2070 1 +
2071 XDR_QUADLEN(rlen) +
2072 2 ) * sizeof(__be32);
2073}
2074
2075
2076
2077
2078
2079#define MAX_LAYOUT_SIZE 128
2080static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2081{
2082 return (op_encode_hdr_size +
2083 1 +
2084 op_encode_stateid_maxsz +
2085 1 +
2086 MAX_LAYOUT_SIZE) * sizeof(__be32);
2087}
2088
2089static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2090{
2091 return (op_encode_hdr_size +
2092 1 +
2093 2 ) * sizeof(__be32);
2094}
2095
2096static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2097{
2098 return (op_encode_hdr_size +
2099 1 +
2100 op_encode_stateid_maxsz) * sizeof(__be32);
2101}
2102#endif
2103
2104
2105static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2106{
2107 return (op_encode_hdr_size + 3) * sizeof(__be32);
2108}
2109
2110static const struct nfsd4_operation nfsd4_ops[] = {
2111 [OP_ACCESS] = {
2112 .op_func = nfsd4_access,
2113 .op_name = "OP_ACCESS",
2114 .op_rsize_bop = nfsd4_access_rsize,
2115 },
2116 [OP_CLOSE] = {
2117 .op_func = nfsd4_close,
2118 .op_flags = OP_MODIFIES_SOMETHING,
2119 .op_name = "OP_CLOSE",
2120 .op_rsize_bop = nfsd4_status_stateid_rsize,
2121 .op_get_currentstateid = nfsd4_get_closestateid,
2122 .op_set_currentstateid = nfsd4_set_closestateid,
2123 },
2124 [OP_COMMIT] = {
2125 .op_func = nfsd4_commit,
2126 .op_flags = OP_MODIFIES_SOMETHING,
2127 .op_name = "OP_COMMIT",
2128 .op_rsize_bop = nfsd4_commit_rsize,
2129 },
2130 [OP_CREATE] = {
2131 .op_func = nfsd4_create,
2132 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2133 .op_name = "OP_CREATE",
2134 .op_rsize_bop = nfsd4_create_rsize,
2135 },
2136 [OP_DELEGRETURN] = {
2137 .op_func = nfsd4_delegreturn,
2138 .op_flags = OP_MODIFIES_SOMETHING,
2139 .op_name = "OP_DELEGRETURN",
2140 .op_rsize_bop = nfsd4_only_status_rsize,
2141 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2142 },
2143 [OP_GETATTR] = {
2144 .op_func = nfsd4_getattr,
2145 .op_flags = ALLOWED_ON_ABSENT_FS,
2146 .op_rsize_bop = nfsd4_getattr_rsize,
2147 .op_name = "OP_GETATTR",
2148 },
2149 [OP_GETFH] = {
2150 .op_func = nfsd4_getfh,
2151 .op_name = "OP_GETFH",
2152 .op_rsize_bop = nfsd4_getfh_rsize,
2153 },
2154 [OP_LINK] = {
2155 .op_func = nfsd4_link,
2156 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2157 | OP_CACHEME,
2158 .op_name = "OP_LINK",
2159 .op_rsize_bop = nfsd4_link_rsize,
2160 },
2161 [OP_LOCK] = {
2162 .op_func = nfsd4_lock,
2163 .op_flags = OP_MODIFIES_SOMETHING,
2164 .op_name = "OP_LOCK",
2165 .op_rsize_bop = nfsd4_lock_rsize,
2166 .op_set_currentstateid = nfsd4_set_lockstateid,
2167 },
2168 [OP_LOCKT] = {
2169 .op_func = nfsd4_lockt,
2170 .op_name = "OP_LOCKT",
2171 .op_rsize_bop = nfsd4_lock_rsize,
2172 },
2173 [OP_LOCKU] = {
2174 .op_func = nfsd4_locku,
2175 .op_flags = OP_MODIFIES_SOMETHING,
2176 .op_name = "OP_LOCKU",
2177 .op_rsize_bop = nfsd4_status_stateid_rsize,
2178 .op_get_currentstateid = nfsd4_get_lockustateid,
2179 },
2180 [OP_LOOKUP] = {
2181 .op_func = nfsd4_lookup,
2182 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2183 .op_name = "OP_LOOKUP",
2184 .op_rsize_bop = nfsd4_only_status_rsize,
2185 },
2186 [OP_LOOKUPP] = {
2187 .op_func = nfsd4_lookupp,
2188 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2189 .op_name = "OP_LOOKUPP",
2190 .op_rsize_bop = nfsd4_only_status_rsize,
2191 },
2192 [OP_NVERIFY] = {
2193 .op_func = nfsd4_nverify,
2194 .op_name = "OP_NVERIFY",
2195 .op_rsize_bop = nfsd4_only_status_rsize,
2196 },
2197 [OP_OPEN] = {
2198 .op_func = nfsd4_open,
2199 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2200 .op_name = "OP_OPEN",
2201 .op_rsize_bop = nfsd4_open_rsize,
2202 .op_set_currentstateid = nfsd4_set_openstateid,
2203 },
2204 [OP_OPEN_CONFIRM] = {
2205 .op_func = nfsd4_open_confirm,
2206 .op_flags = OP_MODIFIES_SOMETHING,
2207 .op_name = "OP_OPEN_CONFIRM",
2208 .op_rsize_bop = nfsd4_status_stateid_rsize,
2209 },
2210 [OP_OPEN_DOWNGRADE] = {
2211 .op_func = nfsd4_open_downgrade,
2212 .op_flags = OP_MODIFIES_SOMETHING,
2213 .op_name = "OP_OPEN_DOWNGRADE",
2214 .op_rsize_bop = nfsd4_status_stateid_rsize,
2215 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2216 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2217 },
2218 [OP_PUTFH] = {
2219 .op_func = nfsd4_putfh,
2220 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2221 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2222 .op_name = "OP_PUTFH",
2223 .op_rsize_bop = nfsd4_only_status_rsize,
2224 },
2225 [OP_PUTPUBFH] = {
2226 .op_func = nfsd4_putrootfh,
2227 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2228 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2229 .op_name = "OP_PUTPUBFH",
2230 .op_rsize_bop = nfsd4_only_status_rsize,
2231 },
2232 [OP_PUTROOTFH] = {
2233 .op_func = nfsd4_putrootfh,
2234 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2235 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2236 .op_name = "OP_PUTROOTFH",
2237 .op_rsize_bop = nfsd4_only_status_rsize,
2238 },
2239 [OP_READ] = {
2240 .op_func = nfsd4_read,
2241 .op_name = "OP_READ",
2242 .op_rsize_bop = nfsd4_read_rsize,
2243 .op_get_currentstateid = nfsd4_get_readstateid,
2244 },
2245 [OP_READDIR] = {
2246 .op_func = nfsd4_readdir,
2247 .op_name = "OP_READDIR",
2248 .op_rsize_bop = nfsd4_readdir_rsize,
2249 },
2250 [OP_READLINK] = {
2251 .op_func = nfsd4_readlink,
2252 .op_name = "OP_READLINK",
2253 .op_rsize_bop = nfsd4_readlink_rsize,
2254 },
2255 [OP_REMOVE] = {
2256 .op_func = nfsd4_remove,
2257 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2258 .op_name = "OP_REMOVE",
2259 .op_rsize_bop = nfsd4_remove_rsize,
2260 },
2261 [OP_RENAME] = {
2262 .op_func = nfsd4_rename,
2263 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2264 .op_name = "OP_RENAME",
2265 .op_rsize_bop = nfsd4_rename_rsize,
2266 },
2267 [OP_RENEW] = {
2268 .op_func = nfsd4_renew,
2269 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2270 | OP_MODIFIES_SOMETHING,
2271 .op_name = "OP_RENEW",
2272 .op_rsize_bop = nfsd4_only_status_rsize,
2273
2274 },
2275 [OP_RESTOREFH] = {
2276 .op_func = nfsd4_restorefh,
2277 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2278 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2279 .op_name = "OP_RESTOREFH",
2280 .op_rsize_bop = nfsd4_only_status_rsize,
2281 },
2282 [OP_SAVEFH] = {
2283 .op_func = nfsd4_savefh,
2284 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2285 .op_name = "OP_SAVEFH",
2286 .op_rsize_bop = nfsd4_only_status_rsize,
2287 },
2288 [OP_SECINFO] = {
2289 .op_func = nfsd4_secinfo,
2290 .op_flags = OP_HANDLES_WRONGSEC,
2291 .op_name = "OP_SECINFO",
2292 .op_rsize_bop = nfsd4_secinfo_rsize,
2293 },
2294 [OP_SETATTR] = {
2295 .op_func = nfsd4_setattr,
2296 .op_name = "OP_SETATTR",
2297 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2298 .op_rsize_bop = nfsd4_setattr_rsize,
2299 .op_get_currentstateid = nfsd4_get_setattrstateid,
2300 },
2301 [OP_SETCLIENTID] = {
2302 .op_func = nfsd4_setclientid,
2303 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2304 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2305 .op_name = "OP_SETCLIENTID",
2306 .op_rsize_bop = nfsd4_setclientid_rsize,
2307 },
2308 [OP_SETCLIENTID_CONFIRM] = {
2309 .op_func = nfsd4_setclientid_confirm,
2310 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2311 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2312 .op_name = "OP_SETCLIENTID_CONFIRM",
2313 .op_rsize_bop = nfsd4_only_status_rsize,
2314 },
2315 [OP_VERIFY] = {
2316 .op_func = nfsd4_verify,
2317 .op_name = "OP_VERIFY",
2318 .op_rsize_bop = nfsd4_only_status_rsize,
2319 },
2320 [OP_WRITE] = {
2321 .op_func = nfsd4_write,
2322 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2323 .op_name = "OP_WRITE",
2324 .op_rsize_bop = nfsd4_write_rsize,
2325 .op_get_currentstateid = nfsd4_get_writestateid,
2326 },
2327 [OP_RELEASE_LOCKOWNER] = {
2328 .op_func = nfsd4_release_lockowner,
2329 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2330 | OP_MODIFIES_SOMETHING,
2331 .op_name = "OP_RELEASE_LOCKOWNER",
2332 .op_rsize_bop = nfsd4_only_status_rsize,
2333 },
2334
2335
2336 [OP_EXCHANGE_ID] = {
2337 .op_func = nfsd4_exchange_id,
2338 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2339 | OP_MODIFIES_SOMETHING,
2340 .op_name = "OP_EXCHANGE_ID",
2341 .op_rsize_bop = nfsd4_exchange_id_rsize,
2342 },
2343 [OP_BACKCHANNEL_CTL] = {
2344 .op_func = nfsd4_backchannel_ctl,
2345 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2346 .op_name = "OP_BACKCHANNEL_CTL",
2347 .op_rsize_bop = nfsd4_only_status_rsize,
2348 },
2349 [OP_BIND_CONN_TO_SESSION] = {
2350 .op_func = nfsd4_bind_conn_to_session,
2351 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2352 | OP_MODIFIES_SOMETHING,
2353 .op_name = "OP_BIND_CONN_TO_SESSION",
2354 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2355 },
2356 [OP_CREATE_SESSION] = {
2357 .op_func = nfsd4_create_session,
2358 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2359 | OP_MODIFIES_SOMETHING,
2360 .op_name = "OP_CREATE_SESSION",
2361 .op_rsize_bop = nfsd4_create_session_rsize,
2362 },
2363 [OP_DESTROY_SESSION] = {
2364 .op_func = nfsd4_destroy_session,
2365 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2366 | OP_MODIFIES_SOMETHING,
2367 .op_name = "OP_DESTROY_SESSION",
2368 .op_rsize_bop = nfsd4_only_status_rsize,
2369 },
2370 [OP_SEQUENCE] = {
2371 .op_func = nfsd4_sequence,
2372 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2373 .op_name = "OP_SEQUENCE",
2374 .op_rsize_bop = nfsd4_sequence_rsize,
2375 },
2376 [OP_DESTROY_CLIENTID] = {
2377 .op_func = nfsd4_destroy_clientid,
2378 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2379 | OP_MODIFIES_SOMETHING,
2380 .op_name = "OP_DESTROY_CLIENTID",
2381 .op_rsize_bop = nfsd4_only_status_rsize,
2382 },
2383 [OP_RECLAIM_COMPLETE] = {
2384 .op_func = nfsd4_reclaim_complete,
2385 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2386 .op_name = "OP_RECLAIM_COMPLETE",
2387 .op_rsize_bop = nfsd4_only_status_rsize,
2388 },
2389 [OP_SECINFO_NO_NAME] = {
2390 .op_func = nfsd4_secinfo_no_name,
2391 .op_flags = OP_HANDLES_WRONGSEC,
2392 .op_name = "OP_SECINFO_NO_NAME",
2393 .op_rsize_bop = nfsd4_secinfo_rsize,
2394 },
2395 [OP_TEST_STATEID] = {
2396 .op_func = nfsd4_test_stateid,
2397 .op_flags = ALLOWED_WITHOUT_FH,
2398 .op_name = "OP_TEST_STATEID",
2399 .op_rsize_bop = nfsd4_test_stateid_rsize,
2400 },
2401 [OP_FREE_STATEID] = {
2402 .op_func = nfsd4_free_stateid,
2403 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2404 .op_name = "OP_FREE_STATEID",
2405 .op_get_currentstateid = nfsd4_get_freestateid,
2406 .op_rsize_bop = nfsd4_only_status_rsize,
2407 },
2408#ifdef CONFIG_NFSD_PNFS
2409 [OP_GETDEVICEINFO] = {
2410 .op_func = nfsd4_getdeviceinfo,
2411 .op_flags = ALLOWED_WITHOUT_FH,
2412 .op_name = "OP_GETDEVICEINFO",
2413 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2414 },
2415 [OP_LAYOUTGET] = {
2416 .op_func = nfsd4_layoutget,
2417 .op_flags = OP_MODIFIES_SOMETHING,
2418 .op_name = "OP_LAYOUTGET",
2419 .op_rsize_bop = nfsd4_layoutget_rsize,
2420 },
2421 [OP_LAYOUTCOMMIT] = {
2422 .op_func = nfsd4_layoutcommit,
2423 .op_flags = OP_MODIFIES_SOMETHING,
2424 .op_name = "OP_LAYOUTCOMMIT",
2425 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2426 },
2427 [OP_LAYOUTRETURN] = {
2428 .op_func = nfsd4_layoutreturn,
2429 .op_flags = OP_MODIFIES_SOMETHING,
2430 .op_name = "OP_LAYOUTRETURN",
2431 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2432 },
2433#endif
2434
2435
2436 [OP_ALLOCATE] = {
2437 .op_func = nfsd4_allocate,
2438 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2439 .op_name = "OP_ALLOCATE",
2440 .op_rsize_bop = nfsd4_only_status_rsize,
2441 },
2442 [OP_DEALLOCATE] = {
2443 .op_func = nfsd4_deallocate,
2444 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2445 .op_name = "OP_DEALLOCATE",
2446 .op_rsize_bop = nfsd4_only_status_rsize,
2447 },
2448 [OP_CLONE] = {
2449 .op_func = nfsd4_clone,
2450 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2451 .op_name = "OP_CLONE",
2452 .op_rsize_bop = nfsd4_only_status_rsize,
2453 },
2454 [OP_COPY] = {
2455 .op_func = nfsd4_copy,
2456 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2457 .op_name = "OP_COPY",
2458 .op_rsize_bop = nfsd4_copy_rsize,
2459 },
2460 [OP_SEEK] = {
2461 .op_func = nfsd4_seek,
2462 .op_name = "OP_SEEK",
2463 .op_rsize_bop = nfsd4_seek_rsize,
2464 },
2465};
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2478{
2479 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2480 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2481 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2482 struct nfsd4_compound_state *cstate = &resp->cstate;
2483 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2484 u32 opiter;
2485
2486 if (!cstate->minorversion)
2487 return false;
2488
2489 if (cstate->spo_must_allowed == true)
2490 return true;
2491
2492 opiter = resp->opcnt;
2493 while (opiter < argp->opcnt) {
2494 this = &argp->ops[opiter++];
2495 if (test_bit(this->opnum, allow->u.longs) &&
2496 cstate->clp->cl_mach_cred &&
2497 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2498 cstate->spo_must_allowed = true;
2499 return true;
2500 }
2501 }
2502 cstate->spo_must_allowed = false;
2503 return false;
2504}
2505
2506int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2507{
2508 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2509 return op_encode_hdr_size * sizeof(__be32);
2510
2511 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2512 return OPDESC(op)->op_rsize_bop(rqstp, op);
2513}
2514
2515void warn_on_nonidempotent_op(struct nfsd4_op *op)
2516{
2517 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2518 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2519 op->opnum, nfsd4_op_name(op->opnum));
2520 WARN_ON_ONCE(1);
2521 }
2522}
2523
2524static const char *nfsd4_op_name(unsigned opnum)
2525{
2526 if (opnum < ARRAY_SIZE(nfsd4_ops))
2527 return nfsd4_ops[opnum].op_name;
2528 return "unknown_operation";
2529}
2530
2531#define nfsd4_voidres nfsd4_voidargs
2532struct nfsd4_voidargs { int dummy; };
2533
2534static const struct svc_procedure nfsd_procedures4[2] = {
2535 [NFSPROC4_NULL] = {
2536 .pc_func = nfsd4_proc_null,
2537 .pc_encode = nfs4svc_encode_voidres,
2538 .pc_argsize = sizeof(struct nfsd4_voidargs),
2539 .pc_ressize = sizeof(struct nfsd4_voidres),
2540 .pc_cachetype = RC_NOCACHE,
2541 .pc_xdrressize = 1,
2542 },
2543 [NFSPROC4_COMPOUND] = {
2544 .pc_func = nfsd4_proc_compound,
2545 .pc_decode = nfs4svc_decode_compoundargs,
2546 .pc_encode = nfs4svc_encode_compoundres,
2547 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2548 .pc_ressize = sizeof(struct nfsd4_compoundres),
2549 .pc_release = nfsd4_release_compoundargs,
2550 .pc_cachetype = RC_NOCACHE,
2551 .pc_xdrressize = NFSD_BUFSIZE/4,
2552 },
2553};
2554
2555static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2556const struct svc_version nfsd_version4 = {
2557 .vs_vers = 4,
2558 .vs_nproc = 2,
2559 .vs_proc = nfsd_procedures4,
2560 .vs_count = nfsd_count3,
2561 .vs_dispatch = nfsd_dispatch,
2562 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2563 .vs_rpcb_optnl = true,
2564 .vs_need_cong_ctrl = true,
2565};
2566
2567
2568
2569
2570
2571
2572