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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
99
100
101
102
103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
106 return nfserr_attrnotsupp;
107
108
109
110
111
112 if (bmval[0] & FATTR4_WORD0_ACL) {
113 if (!IS_POSIXACL(d_inode(dentry)))
114 return nfserr_attrnotsupp;
115 }
116
117
118
119
120 if (writable) {
121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
122 (bmval[2] & ~writable[2]))
123 return nfserr_inval;
124 }
125
126 return nfs_ok;
127}
128
129static __be32
130nfsd4_check_open_attributes(struct svc_rqst *rqstp,
131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
132{
133 __be32 status = nfs_ok;
134
135 if (open->op_create == NFS4_OPEN_CREATE) {
136 if (open->op_createmode == NFS4_CREATE_UNCHECKED
137 || open->op_createmode == NFS4_CREATE_GUARDED)
138 status = check_attr_support(rqstp, cstate,
139 open->op_bmval, nfsd_attrmask);
140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
141 status = check_attr_support(rqstp, cstate,
142 open->op_bmval, nfsd41_ex_attrmask);
143 }
144
145 return status;
146}
147
148static int
149is_create_with_attrs(struct nfsd4_open *open)
150{
151 return open->op_create == NFS4_OPEN_CREATE
152 && (open->op_createmode == NFS4_CREATE_UNCHECKED
153 || open->op_createmode == NFS4_CREATE_GUARDED
154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
155}
156
157
158
159
160
161static void
162do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
163 struct nfs4_acl *acl, u32 *bmval)
164{
165 __be32 status;
166
167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
168 if (status)
169
170
171
172
173
174 bmval[0] &= ~FATTR4_WORD0_ACL;
175}
176
177static inline void
178fh_dup2(struct svc_fh *dst, struct svc_fh *src)
179{
180 fh_put(dst);
181 dget(src->fh_dentry);
182 if (src->fh_export)
183 exp_get(src->fh_export);
184 *dst = *src;
185}
186
187static __be32
188do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
189{
190 __be32 status;
191
192 if (open->op_truncate &&
193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
194 return nfserr_inval;
195
196 accmode |= NFSD_MAY_READ_IF_EXEC;
197
198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
199 accmode |= NFSD_MAY_READ;
200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
202 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
203 accmode |= NFSD_MAY_WRITE;
204
205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
206
207 return status;
208}
209
210static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
211{
212 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
213
214 if (S_ISREG(mode))
215 return nfs_ok;
216 if (S_ISDIR(mode))
217 return nfserr_isdir;
218
219
220
221
222
223
224
225 return nfserr_symlink;
226}
227
228static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
229{
230 if (nfsd4_has_session(cstate))
231 return;
232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
233 &resfh->fh_handle);
234}
235
236static __be32
237do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
238{
239 struct svc_fh *current_fh = &cstate->current_fh;
240 int accmode;
241 __be32 status;
242
243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
244 if (!*resfh)
245 return nfserr_jukebox;
246 fh_init(*resfh, NFS4_FHSIZE);
247 open->op_truncate = 0;
248
249 if (open->op_create) {
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
270 open->op_fname.len, &open->op_iattr,
271 *resfh, open->op_createmode,
272 (u32 *)open->op_verf.data,
273 &open->op_truncate, &open->op_created);
274
275 if (!status && open->op_label.len)
276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
277
278
279
280
281
282
283 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
284 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
285 FATTR4_WORD1_TIME_MODIFY);
286 } else
287
288
289
290
291
292
293 status = nfsd_lookup(rqstp, current_fh,
294 open->op_fname.data, open->op_fname.len, *resfh);
295 if (status)
296 goto out;
297 status = nfsd_check_obj_isreg(*resfh);
298 if (status)
299 goto out;
300
301 if (is_create_with_attrs(open) && open->op_acl != NULL)
302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
303
304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
305 accmode = NFSD_MAY_NOP;
306 if (open->op_created ||
307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
308 accmode |= NFSD_MAY_OWNER_OVERRIDE;
309 status = do_open_permission(rqstp, *resfh, open, accmode);
310 set_change_info(&open->op_cinfo, current_fh);
311out:
312 return status;
313}
314
315static __be32
316do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
317{
318 struct svc_fh *current_fh = &cstate->current_fh;
319 __be32 status;
320 int accmode = 0;
321
322
323
324
325
326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
327
328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
329
330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
331 (open->op_iattr.ia_size == 0);
332
333
334
335
336
337
338
339
340
341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
342 accmode = NFSD_MAY_OWNER_OVERRIDE;
343
344 status = do_open_permission(rqstp, current_fh, open, accmode);
345
346 return status;
347}
348
349static void
350copy_clientid(clientid_t *clid, struct nfsd4_session *session)
351{
352 struct nfsd4_sessionid *sid =
353 (struct nfsd4_sessionid *)session->se_sessionid.data;
354
355 clid->cl_boot = sid->clientid.cl_boot;
356 clid->cl_id = sid->clientid.cl_id;
357}
358
359static __be32
360nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
361 struct nfsd4_open *open)
362{
363 __be32 status;
364 struct svc_fh *resfh = NULL;
365 struct net *net = SVC_NET(rqstp);
366 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
367
368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
369 (int)open->op_fname.len, open->op_fname.data,
370 open->op_openowner);
371
372
373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
374 return nfserr_inval;
375
376 open->op_created = 0;
377
378
379
380
381 if (nfsd4_has_session(cstate) &&
382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
383 &cstate->session->se_client->cl_flags) &&
384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
385 return nfserr_grace;
386
387 if (nfsd4_has_session(cstate))
388 copy_clientid(&open->op_clientid, cstate->session);
389
390
391 status = nfsd4_process_open1(cstate, open, nn);
392 if (status == nfserr_replay_me) {
393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
394 fh_put(&cstate->current_fh);
395 fh_copy_shallow(&cstate->current_fh.fh_handle,
396 &rp->rp_openfh);
397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
398 if (status)
399 dprintk("nfsd4_open: replay failed"
400 " restoring previous filehandle\n");
401 else
402 status = nfserr_replay_me;
403 }
404 if (status)
405 goto out;
406 if (open->op_xdr_error) {
407 status = open->op_xdr_error;
408 goto out;
409 }
410
411 status = nfsd4_check_open_attributes(rqstp, cstate, open);
412 if (status)
413 goto out;
414
415
416
417 status = nfserr_grace;
418 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
419 goto out;
420 status = nfserr_no_grace;
421 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
422 goto out;
423
424 switch (open->op_claim_type) {
425 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
426 case NFS4_OPEN_CLAIM_NULL:
427 status = do_open_lookup(rqstp, cstate, open, &resfh);
428 if (status)
429 goto out;
430 break;
431 case NFS4_OPEN_CLAIM_PREVIOUS:
432 status = nfs4_check_open_reclaim(&open->op_clientid,
433 cstate, nn);
434 if (status)
435 goto out;
436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
437 case NFS4_OPEN_CLAIM_FH:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
439 status = do_open_fhandle(rqstp, cstate, open);
440 if (status)
441 goto out;
442 resfh = &cstate->current_fh;
443 break;
444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
445 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
446 dprintk("NFSD: unsupported OPEN claim type %d\n",
447 open->op_claim_type);
448 status = nfserr_notsupp;
449 goto out;
450 default:
451 dprintk("NFSD: Invalid OPEN claim type %d\n",
452 open->op_claim_type);
453 status = nfserr_inval;
454 goto out;
455 }
456
457
458
459
460
461 status = nfsd4_process_open2(rqstp, resfh, open);
462 WARN(status && open->op_created,
463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
464 be32_to_cpu(status));
465out:
466 if (resfh && resfh != &cstate->current_fh) {
467 fh_dup2(&cstate->current_fh, resfh);
468 fh_put(resfh);
469 kfree(resfh);
470 }
471 nfsd4_cleanup_open_state(cstate, open);
472 nfsd4_bump_seqid(cstate, status);
473 return status;
474}
475
476
477
478
479
480
481
482static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
483{
484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
485
486 if (!seqid_mutating_err(ntohl(op->status)))
487 return op->status;
488 if (nfsd4_has_session(cstate))
489 return op->status;
490 open->op_xdr_error = op->status;
491 return nfsd4_open(rqstp, cstate, open);
492}
493
494
495
496
497static __be32
498nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct svc_fh **getfh)
500{
501 if (!cstate->current_fh.fh_dentry)
502 return nfserr_nofilehandle;
503
504 *getfh = &cstate->current_fh;
505 return nfs_ok;
506}
507
508static __be32
509nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
510 struct nfsd4_putfh *putfh)
511{
512 fh_put(&cstate->current_fh);
513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
515 putfh->pf_fhlen);
516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
517}
518
519static __be32
520nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
521 void *arg)
522{
523 __be32 status;
524
525 fh_put(&cstate->current_fh);
526 status = exp_pseudoroot(rqstp, &cstate->current_fh);
527 return status;
528}
529
530static __be32
531nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
532 void *arg)
533{
534 if (!cstate->save_fh.fh_dentry)
535 return nfserr_restorefh;
536
537 fh_dup2(&cstate->current_fh, &cstate->save_fh);
538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
541 }
542 return nfs_ok;
543}
544
545static __be32
546nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 void *arg)
548{
549 if (!cstate->current_fh.fh_dentry)
550 return nfserr_nofilehandle;
551
552 fh_dup2(&cstate->save_fh, &cstate->current_fh);
553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
556 }
557 return nfs_ok;
558}
559
560
561
562
563static __be32
564nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
565 struct nfsd4_access *access)
566{
567 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
568 return nfserr_inval;
569
570 access->ac_resp_access = access->ac_req_access;
571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
572 &access->ac_supported);
573}
574
575static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
576{
577 __be32 verf[2];
578 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
579
580
581
582
583
584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
586 memcpy(verifier->data, verf, sizeof(verifier->data));
587}
588
589static __be32
590nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
591 struct nfsd4_commit *commit)
592{
593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
595 commit->co_count);
596}
597
598static __be32
599nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
600 struct nfsd4_create *create)
601{
602 struct svc_fh resfh;
603 __be32 status;
604 dev_t rdev;
605
606 fh_init(&resfh, NFS4_FHSIZE);
607
608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
609 if (status)
610 return status;
611
612 status = check_attr_support(rqstp, cstate, create->cr_bmval,
613 nfsd_attrmask);
614 if (status)
615 return status;
616
617 switch (create->cr_type) {
618 case NF4LNK:
619 status = nfsd_symlink(rqstp, &cstate->current_fh,
620 create->cr_name, create->cr_namelen,
621 create->cr_data, &resfh);
622 break;
623
624 case NF4BLK:
625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
626 if (MAJOR(rdev) != create->cr_specdata1 ||
627 MINOR(rdev) != create->cr_specdata2)
628 return nfserr_inval;
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 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
636 if (MAJOR(rdev) != create->cr_specdata1 ||
637 MINOR(rdev) != create->cr_specdata2)
638 return nfserr_inval;
639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr,S_IFCHR, rdev, &resfh);
642 break;
643
644 case NF4SOCK:
645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFSOCK, 0, &resfh);
648 break;
649
650 case NF4FIFO:
651 status = nfsd_create(rqstp, &cstate->current_fh,
652 create->cr_name, create->cr_namelen,
653 &create->cr_iattr, S_IFIFO, 0, &resfh);
654 break;
655
656 case NF4DIR:
657 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
658 status = nfsd_create(rqstp, &cstate->current_fh,
659 create->cr_name, create->cr_namelen,
660 &create->cr_iattr, S_IFDIR, 0, &resfh);
661 break;
662
663 default:
664 status = nfserr_badtype;
665 }
666
667 if (status)
668 goto out;
669
670 if (create->cr_label.len)
671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
672
673 if (create->cr_acl != NULL)
674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
675 create->cr_bmval);
676
677 fh_unlock(&cstate->current_fh);
678 set_change_info(&create->cr_cinfo, &cstate->current_fh);
679 fh_dup2(&cstate->current_fh, &resfh);
680out:
681 fh_put(&resfh);
682 return status;
683}
684
685static __be32
686nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
687 struct nfsd4_getattr *getattr)
688{
689 __be32 status;
690
691 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
692 if (status)
693 return status;
694
695 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
696 return nfserr_inval;
697
698 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
699 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
700 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
701
702 getattr->ga_fhp = &cstate->current_fh;
703 return nfs_ok;
704}
705
706static __be32
707nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 struct nfsd4_link *link)
709{
710 __be32 status = nfserr_nofilehandle;
711
712 if (!cstate->save_fh.fh_dentry)
713 return status;
714 status = nfsd_link(rqstp, &cstate->current_fh,
715 link->li_name, link->li_namelen, &cstate->save_fh);
716 if (!status)
717 set_change_info(&link->li_cinfo, &cstate->current_fh);
718 return status;
719}
720
721static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
722{
723 struct svc_fh tmp_fh;
724 __be32 ret;
725
726 fh_init(&tmp_fh, NFS4_FHSIZE);
727 ret = exp_pseudoroot(rqstp, &tmp_fh);
728 if (ret)
729 return ret;
730 if (tmp_fh.fh_dentry == fh->fh_dentry) {
731 fh_put(&tmp_fh);
732 return nfserr_noent;
733 }
734 fh_put(&tmp_fh);
735 return nfsd_lookup(rqstp, fh, "..", 2, fh);
736}
737
738static __be32
739nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
740 void *arg)
741{
742 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
743}
744
745static __be32
746nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
747 struct nfsd4_lookup *lookup)
748{
749 return nfsd_lookup(rqstp, &cstate->current_fh,
750 lookup->lo_name, lookup->lo_len,
751 &cstate->current_fh);
752}
753
754static __be32
755nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
756 struct nfsd4_read *read)
757{
758 __be32 status;
759
760 read->rd_filp = NULL;
761 if (read->rd_offset >= OFFSET_MAX)
762 return nfserr_inval;
763
764
765
766
767
768
769
770
771
772 if (!nfsd4_last_compound_op(rqstp))
773 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
774
775
776 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
777 &read->rd_stateid, RD_STATE,
778 &read->rd_filp, &read->rd_tmp_file);
779 if (status) {
780 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
781 goto out;
782 }
783 status = nfs_ok;
784out:
785 read->rd_rqstp = rqstp;
786 read->rd_fhp = &cstate->current_fh;
787 return status;
788}
789
790static __be32
791nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
792 struct nfsd4_readdir *readdir)
793{
794 u64 cookie = readdir->rd_cookie;
795 static const nfs4_verifier zeroverf;
796
797
798
799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
800 return nfserr_inval;
801
802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
805
806 if ((cookie == 1) || (cookie == 2) ||
807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
808 return nfserr_bad_cookie;
809
810 readdir->rd_rqstp = rqstp;
811 readdir->rd_fhp = &cstate->current_fh;
812 return nfs_ok;
813}
814
815static __be32
816nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
817 struct nfsd4_readlink *readlink)
818{
819 readlink->rl_rqstp = rqstp;
820 readlink->rl_fhp = &cstate->current_fh;
821 return nfs_ok;
822}
823
824static __be32
825nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_remove *remove)
827{
828 __be32 status;
829
830 if (opens_in_grace(SVC_NET(rqstp)))
831 return nfserr_grace;
832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
833 remove->rm_name, remove->rm_namelen);
834 if (!status) {
835 fh_unlock(&cstate->current_fh);
836 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
837 }
838 return status;
839}
840
841static __be32
842nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
843 struct nfsd4_rename *rename)
844{
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 struct nfsd4_secinfo *secinfo)
865{
866 struct svc_export *exp;
867 struct dentry *dentry;
868 __be32 err;
869
870 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
871 if (err)
872 return err;
873 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
874 secinfo->si_name, secinfo->si_namelen,
875 &exp, &dentry);
876 if (err)
877 return err;
878 fh_unlock(&cstate->current_fh);
879 if (d_really_is_negative(dentry)) {
880 exp_put(exp);
881 err = nfserr_noent;
882 } else
883 secinfo->si_exp = exp;
884 dput(dentry);
885 if (cstate->minorversion)
886
887 fh_put(&cstate->current_fh);
888 return err;
889}
890
891static __be32
892nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
893 struct nfsd4_secinfo_no_name *sin)
894{
895 __be32 err;
896
897 switch (sin->sin_style) {
898 case NFS4_SECINFO_STYLE4_CURRENT_FH:
899 break;
900 case NFS4_SECINFO_STYLE4_PARENT:
901 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
902 if (err)
903 return err;
904 break;
905 default:
906 return nfserr_inval;
907 }
908
909 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
910 fh_put(&cstate->current_fh);
911 return nfs_ok;
912}
913
914static __be32
915nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
916 struct nfsd4_setattr *setattr)
917{
918 __be32 status = nfs_ok;
919 int err;
920
921 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
922 status = nfs4_preprocess_stateid_op(rqstp, cstate,
923 &cstate->current_fh, &setattr->sa_stateid,
924 WR_STATE, NULL, NULL);
925 if (status) {
926 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
927 return status;
928 }
929 }
930 err = fh_want_write(&cstate->current_fh);
931 if (err)
932 return nfserrno(err);
933 status = nfs_ok;
934
935 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
936 nfsd_attrmask);
937 if (status)
938 goto out;
939
940 if (setattr->sa_acl != NULL)
941 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
942 setattr->sa_acl);
943 if (status)
944 goto out;
945 if (setattr->sa_label.len)
946 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
947 &setattr->sa_label);
948 if (status)
949 goto out;
950 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
951 0, (time_t)0);
952out:
953 fh_drop_write(&cstate->current_fh);
954 return status;
955}
956
957static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
958{
959 int i = 1;
960 int buflen = write->wr_buflen;
961
962 vec[0].iov_base = write->wr_head.iov_base;
963 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
964 buflen -= vec[0].iov_len;
965
966 while (buflen) {
967 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
968 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
969 buflen -= vec[i].iov_len;
970 i++;
971 }
972 return i;
973}
974
975static __be32
976nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
977 struct nfsd4_write *write)
978{
979 stateid_t *stateid = &write->wr_stateid;
980 struct file *filp = NULL;
981 __be32 status = nfs_ok;
982 unsigned long cnt;
983 int nvecs;
984
985 if (write->wr_offset >= OFFSET_MAX)
986 return nfserr_inval;
987
988 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
989 stateid, WR_STATE, &filp, NULL);
990 if (status) {
991 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
992 return status;
993 }
994
995 cnt = write->wr_buflen;
996 write->wr_how_written = write->wr_stable_how;
997 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
998
999 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1000 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1001
1002 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1003 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1004 &write->wr_how_written);
1005 fput(filp);
1006
1007 write->wr_bytes_written = cnt;
1008
1009 return status;
1010}
1011
1012static __be32
1013nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1014 stateid_t *src_stateid, struct file **src,
1015 stateid_t *dst_stateid, struct file **dst)
1016{
1017 __be32 status;
1018
1019 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1020 src_stateid, RD_STATE, src, NULL);
1021 if (status) {
1022 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1023 goto out;
1024 }
1025
1026 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1027 dst_stateid, WR_STATE, dst, NULL);
1028 if (status) {
1029 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1030 goto out_put_src;
1031 }
1032
1033
1034 if (!S_ISREG(file_inode(*src)->i_mode) ||
1035 !S_ISREG(file_inode(*dst)->i_mode)) {
1036 status = nfserr_wrong_type;
1037 goto out_put_dst;
1038 }
1039
1040out:
1041 return status;
1042out_put_dst:
1043 fput(*dst);
1044out_put_src:
1045 fput(*src);
1046 goto out;
1047}
1048
1049static __be32
1050nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1051 struct nfsd4_clone *clone)
1052{
1053 struct file *src, *dst;
1054 __be32 status;
1055
1056 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1057 &clone->cl_dst_stateid, &dst);
1058 if (status)
1059 goto out;
1060
1061 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1062 dst, clone->cl_dst_pos, clone->cl_count);
1063
1064 fput(dst);
1065 fput(src);
1066out:
1067 return status;
1068}
1069
1070static __be32
1071nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1072 struct nfsd4_copy *copy)
1073{
1074 struct file *src, *dst;
1075 __be32 status;
1076 ssize_t bytes;
1077
1078 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1079 ©->cp_dst_stateid, &dst);
1080 if (status)
1081 goto out;
1082
1083 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1084 dst, copy->cp_dst_pos, copy->cp_count);
1085
1086 if (bytes < 0)
1087 status = nfserrno(bytes);
1088 else {
1089 copy->cp_res.wr_bytes_written = bytes;
1090 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1091 copy->cp_consecutive = 1;
1092 copy->cp_synchronous = 1;
1093 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1094 status = nfs_ok;
1095 }
1096
1097 fput(src);
1098 fput(dst);
1099out:
1100 return status;
1101}
1102
1103static __be32
1104nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1105 struct nfsd4_fallocate *fallocate, int flags)
1106{
1107 __be32 status = nfserr_notsupp;
1108 struct file *file;
1109
1110 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1111 &fallocate->falloc_stateid,
1112 WR_STATE, &file, NULL);
1113 if (status != nfs_ok) {
1114 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1115 return status;
1116 }
1117
1118 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1119 fallocate->falloc_offset,
1120 fallocate->falloc_length,
1121 flags);
1122 fput(file);
1123 return status;
1124}
1125
1126static __be32
1127nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1128 struct nfsd4_fallocate *fallocate)
1129{
1130 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1131}
1132
1133static __be32
1134nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1135 struct nfsd4_fallocate *fallocate)
1136{
1137 return nfsd4_fallocate(rqstp, cstate, fallocate,
1138 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1139}
1140
1141static __be32
1142nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1143 struct nfsd4_seek *seek)
1144{
1145 int whence;
1146 __be32 status;
1147 struct file *file;
1148
1149 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1150 &seek->seek_stateid,
1151 RD_STATE, &file, NULL);
1152 if (status) {
1153 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1154 return status;
1155 }
1156
1157 switch (seek->seek_whence) {
1158 case NFS4_CONTENT_DATA:
1159 whence = SEEK_DATA;
1160 break;
1161 case NFS4_CONTENT_HOLE:
1162 whence = SEEK_HOLE;
1163 break;
1164 default:
1165 status = nfserr_union_notsupp;
1166 goto out;
1167 }
1168
1169
1170
1171
1172
1173 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1174 if (seek->seek_pos < 0)
1175 status = nfserrno(seek->seek_pos);
1176 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1177 seek->seek_eof = true;
1178
1179out:
1180 fput(file);
1181 return status;
1182}
1183
1184
1185
1186
1187
1188
1189static __be32
1190_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1191 struct nfsd4_verify *verify)
1192{
1193 __be32 *buf, *p;
1194 int count;
1195 __be32 status;
1196
1197 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1198 if (status)
1199 return status;
1200
1201 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1202 if (status)
1203 return status;
1204
1205 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1206 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1207 return nfserr_inval;
1208 if (verify->ve_attrlen & 3)
1209 return nfserr_inval;
1210
1211
1212
1213
1214 count = 4 + (verify->ve_attrlen >> 2);
1215 buf = kmalloc(count << 2, GFP_KERNEL);
1216 if (!buf)
1217 return nfserr_jukebox;
1218
1219 p = buf;
1220 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1221 cstate->current_fh.fh_export,
1222 cstate->current_fh.fh_dentry,
1223 verify->ve_bmval,
1224 rqstp, 0);
1225
1226
1227
1228
1229 if (status == nfserr_resource)
1230 status = nfserr_not_same;
1231 if (status)
1232 goto out_kfree;
1233
1234
1235 p = buf + 1 + ntohl(buf[0]);
1236 status = nfserr_not_same;
1237 if (ntohl(*p++) != verify->ve_attrlen)
1238 goto out_kfree;
1239 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1240 status = nfserr_same;
1241
1242out_kfree:
1243 kfree(buf);
1244 return status;
1245}
1246
1247static __be32
1248nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1249 struct nfsd4_verify *verify)
1250{
1251 __be32 status;
1252
1253 status = _nfsd4_verify(rqstp, cstate, verify);
1254 return status == nfserr_not_same ? nfs_ok : status;
1255}
1256
1257static __be32
1258nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1259 struct nfsd4_verify *verify)
1260{
1261 __be32 status;
1262
1263 status = _nfsd4_verify(rqstp, cstate, verify);
1264 return status == nfserr_same ? nfs_ok : status;
1265}
1266
1267#ifdef CONFIG_NFSD_PNFS
1268static const struct nfsd4_layout_ops *
1269nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1270{
1271 if (!exp->ex_layout_types) {
1272 dprintk("%s: export does not support pNFS\n", __func__);
1273 return NULL;
1274 }
1275
1276 if (!(exp->ex_layout_types & (1 << layout_type))) {
1277 dprintk("%s: layout type %d not supported\n",
1278 __func__, layout_type);
1279 return NULL;
1280 }
1281
1282 return nfsd4_layout_ops[layout_type];
1283}
1284
1285static __be32
1286nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1287 struct nfsd4_compound_state *cstate,
1288 struct nfsd4_getdeviceinfo *gdp)
1289{
1290 const struct nfsd4_layout_ops *ops;
1291 struct nfsd4_deviceid_map *map;
1292 struct svc_export *exp;
1293 __be32 nfserr;
1294
1295 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1296 __func__,
1297 gdp->gd_layout_type,
1298 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1299 gdp->gd_maxcount);
1300
1301 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1302 if (!map) {
1303 dprintk("%s: couldn't find device ID to export mapping!\n",
1304 __func__);
1305 return nfserr_noent;
1306 }
1307
1308 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1309 if (IS_ERR(exp)) {
1310 dprintk("%s: could not find device id\n", __func__);
1311 return nfserr_noent;
1312 }
1313
1314 nfserr = nfserr_layoutunavailable;
1315 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1316 if (!ops)
1317 goto out;
1318
1319 nfserr = nfs_ok;
1320 if (gdp->gd_maxcount != 0) {
1321 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1322 rqstp, cstate->session->se_client, gdp);
1323 }
1324
1325 gdp->gd_notify_types &= ops->notify_types;
1326out:
1327 exp_put(exp);
1328 return nfserr;
1329}
1330
1331static __be32
1332nfsd4_layoutget(struct svc_rqst *rqstp,
1333 struct nfsd4_compound_state *cstate,
1334 struct nfsd4_layoutget *lgp)
1335{
1336 struct svc_fh *current_fh = &cstate->current_fh;
1337 const struct nfsd4_layout_ops *ops;
1338 struct nfs4_layout_stateid *ls;
1339 __be32 nfserr;
1340 int accmode;
1341
1342 switch (lgp->lg_seg.iomode) {
1343 case IOMODE_READ:
1344 accmode = NFSD_MAY_READ;
1345 break;
1346 case IOMODE_RW:
1347 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1348 break;
1349 default:
1350 dprintk("%s: invalid iomode %d\n",
1351 __func__, lgp->lg_seg.iomode);
1352 nfserr = nfserr_badiomode;
1353 goto out;
1354 }
1355
1356 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1357 if (nfserr)
1358 goto out;
1359
1360 nfserr = nfserr_layoutunavailable;
1361 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1362 if (!ops)
1363 goto out;
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376 nfserr = nfserr_inval;
1377 if (lgp->lg_seg.length < lgp->lg_minlength ||
1378 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1379 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1380 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1381 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1382 goto out;
1383 if (lgp->lg_seg.length == 0)
1384 goto out;
1385
1386 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1387 true, lgp->lg_layout_type, &ls);
1388 if (nfserr) {
1389 trace_layout_get_lookup_fail(&lgp->lg_sid);
1390 goto out;
1391 }
1392
1393 nfserr = nfserr_recallconflict;
1394 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1395 goto out_put_stid;
1396
1397 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1398 current_fh, lgp);
1399 if (nfserr)
1400 goto out_put_stid;
1401
1402 nfserr = nfsd4_insert_layout(lgp, ls);
1403
1404out_put_stid:
1405 mutex_unlock(&ls->ls_mutex);
1406 nfs4_put_stid(&ls->ls_stid);
1407out:
1408 return nfserr;
1409}
1410
1411static __be32
1412nfsd4_layoutcommit(struct svc_rqst *rqstp,
1413 struct nfsd4_compound_state *cstate,
1414 struct nfsd4_layoutcommit *lcp)
1415{
1416 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1417 struct svc_fh *current_fh = &cstate->current_fh;
1418 const struct nfsd4_layout_ops *ops;
1419 loff_t new_size = lcp->lc_last_wr + 1;
1420 struct inode *inode;
1421 struct nfs4_layout_stateid *ls;
1422 __be32 nfserr;
1423
1424 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1425 if (nfserr)
1426 goto out;
1427
1428 nfserr = nfserr_layoutunavailable;
1429 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1430 if (!ops)
1431 goto out;
1432 inode = d_inode(current_fh->fh_dentry);
1433
1434 nfserr = nfserr_inval;
1435 if (new_size <= seg->offset) {
1436 dprintk("pnfsd: last write before layout segment\n");
1437 goto out;
1438 }
1439 if (new_size > seg->offset + seg->length) {
1440 dprintk("pnfsd: last write beyond layout segment\n");
1441 goto out;
1442 }
1443 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1444 dprintk("pnfsd: layoutcommit beyond EOF\n");
1445 goto out;
1446 }
1447
1448 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1449 false, lcp->lc_layout_type,
1450 &ls);
1451 if (nfserr) {
1452 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1453
1454 if (nfserr == nfserr_bad_stateid)
1455 nfserr = nfserr_badlayout;
1456 goto out;
1457 }
1458
1459
1460 mutex_unlock(&ls->ls_mutex);
1461
1462 if (new_size > i_size_read(inode)) {
1463 lcp->lc_size_chg = 1;
1464 lcp->lc_newsize = new_size;
1465 } else {
1466 lcp->lc_size_chg = 0;
1467 }
1468
1469 nfserr = ops->proc_layoutcommit(inode, lcp);
1470 nfs4_put_stid(&ls->ls_stid);
1471out:
1472 return nfserr;
1473}
1474
1475static __be32
1476nfsd4_layoutreturn(struct svc_rqst *rqstp,
1477 struct nfsd4_compound_state *cstate,
1478 struct nfsd4_layoutreturn *lrp)
1479{
1480 struct svc_fh *current_fh = &cstate->current_fh;
1481 __be32 nfserr;
1482
1483 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1484 if (nfserr)
1485 goto out;
1486
1487 nfserr = nfserr_layoutunavailable;
1488 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1489 goto out;
1490
1491 switch (lrp->lr_seg.iomode) {
1492 case IOMODE_READ:
1493 case IOMODE_RW:
1494 case IOMODE_ANY:
1495 break;
1496 default:
1497 dprintk("%s: invalid iomode %d\n", __func__,
1498 lrp->lr_seg.iomode);
1499 nfserr = nfserr_inval;
1500 goto out;
1501 }
1502
1503 switch (lrp->lr_return_type) {
1504 case RETURN_FILE:
1505 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1506 break;
1507 case RETURN_FSID:
1508 case RETURN_ALL:
1509 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1510 break;
1511 default:
1512 dprintk("%s: invalid return_type %d\n", __func__,
1513 lrp->lr_return_type);
1514 nfserr = nfserr_inval;
1515 break;
1516 }
1517out:
1518 return nfserr;
1519}
1520#endif
1521
1522
1523
1524
1525static __be32
1526nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1527{
1528 return nfs_ok;
1529}
1530
1531static inline void nfsd4_increment_op_stats(u32 opnum)
1532{
1533 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1534 nfsdstats.nfs4_opcount[opnum]++;
1535}
1536
1537typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1538 void *);
1539typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1540typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1541typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1542
1543enum nfsd4_op_flags {
1544 ALLOWED_WITHOUT_FH = 1 << 0,
1545 ALLOWED_ON_ABSENT_FS = 1 << 1,
1546 ALLOWED_AS_FIRST_OP = 1 << 2,
1547
1548 OP_HANDLES_WRONGSEC = 1 << 3,
1549 OP_IS_PUTFH_LIKE = 1 << 4,
1550
1551
1552
1553
1554
1555
1556 OP_MODIFIES_SOMETHING = 1 << 5,
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566 OP_CACHEME = 1 << 6,
1567
1568
1569
1570 OP_CLEAR_STATEID = 1 << 7,
1571};
1572
1573struct nfsd4_operation {
1574 nfsd4op_func op_func;
1575 u32 op_flags;
1576 char *op_name;
1577
1578 nfsd4op_rsize op_rsize_bop;
1579 stateid_getter op_get_currentstateid;
1580 stateid_setter op_set_currentstateid;
1581};
1582
1583static struct nfsd4_operation nfsd4_ops[];
1584
1585static const char *nfsd4_op_name(unsigned opnum);
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1600{
1601 struct nfsd4_op *op = &args->ops[0];
1602
1603
1604 if (args->minorversion == 0)
1605 return nfs_ok;
1606
1607 if (args->opcnt == 0)
1608 return nfs_ok;
1609 if (op->status == nfserr_op_illegal)
1610 return nfs_ok;
1611 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1612 return nfserr_op_not_in_session;
1613 if (op->opnum == OP_SEQUENCE)
1614 return nfs_ok;
1615 if (args->opcnt != 1)
1616 return nfserr_not_only_op;
1617 return nfs_ok;
1618}
1619
1620static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1621{
1622 return &nfsd4_ops[op->opnum];
1623}
1624
1625bool nfsd4_cache_this_op(struct nfsd4_op *op)
1626{
1627 if (op->opnum == OP_ILLEGAL)
1628 return false;
1629 return OPDESC(op)->op_flags & OP_CACHEME;
1630}
1631
1632static bool need_wrongsec_check(struct svc_rqst *rqstp)
1633{
1634 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1635 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1636 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1637 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1638 struct nfsd4_operation *thisd;
1639 struct nfsd4_operation *nextd;
1640
1641 thisd = OPDESC(this);
1642
1643
1644
1645
1646 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1647 return false;
1648
1649
1650
1651
1652
1653 if (argp->opcnt == resp->opcnt)
1654 return false;
1655 if (next->opnum == OP_ILLEGAL)
1656 return false;
1657 nextd = OPDESC(next);
1658
1659
1660
1661
1662
1663 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1664}
1665
1666static void svcxdr_init_encode(struct svc_rqst *rqstp,
1667 struct nfsd4_compoundres *resp)
1668{
1669 struct xdr_stream *xdr = &resp->xdr;
1670 struct xdr_buf *buf = &rqstp->rq_res;
1671 struct kvec *head = buf->head;
1672
1673 xdr->buf = buf;
1674 xdr->iov = head;
1675 xdr->p = head->iov_base + head->iov_len;
1676 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1677
1678 buf->len = buf->head[0].iov_len;
1679 xdr->scratch.iov_len = 0;
1680 xdr->page_ptr = buf->pages - 1;
1681 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1682 - rqstp->rq_auth_slack;
1683}
1684
1685
1686
1687
1688static __be32
1689nfsd4_proc_compound(struct svc_rqst *rqstp,
1690 struct nfsd4_compoundargs *args,
1691 struct nfsd4_compoundres *resp)
1692{
1693 struct nfsd4_op *op;
1694 struct nfsd4_operation *opdesc;
1695 struct nfsd4_compound_state *cstate = &resp->cstate;
1696 struct svc_fh *current_fh = &cstate->current_fh;
1697 struct svc_fh *save_fh = &cstate->save_fh;
1698 __be32 status;
1699
1700 svcxdr_init_encode(rqstp, resp);
1701 resp->tagp = resp->xdr.p;
1702
1703 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1704 resp->taglen = args->taglen;
1705 resp->tag = args->tag;
1706 resp->rqstp = rqstp;
1707 cstate->minorversion = args->minorversion;
1708 fh_init(current_fh, NFS4_FHSIZE);
1709 fh_init(save_fh, NFS4_FHSIZE);
1710
1711
1712
1713
1714 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1715
1716
1717
1718
1719 status = nfserr_minor_vers_mismatch;
1720 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1721 goto out;
1722
1723 status = nfs41_check_op_ordering(args);
1724 if (status) {
1725 op = &args->ops[0];
1726 op->status = status;
1727 goto encode_op;
1728 }
1729
1730 while (!status && resp->opcnt < args->opcnt) {
1731 op = &args->ops[resp->opcnt++];
1732
1733 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1734 resp->opcnt, args->opcnt, op->opnum,
1735 nfsd4_op_name(op->opnum));
1736
1737
1738
1739
1740
1741 if (op->status) {
1742 if (op->opnum == OP_OPEN)
1743 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1744 goto encode_op;
1745 }
1746
1747 opdesc = OPDESC(op);
1748
1749 if (!current_fh->fh_dentry) {
1750 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1751 op->status = nfserr_nofilehandle;
1752 goto encode_op;
1753 }
1754 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1755 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1756 op->status = nfserr_moved;
1757 goto encode_op;
1758 }
1759
1760 fh_clear_wcc(current_fh);
1761
1762
1763 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1764
1765
1766
1767
1768 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1769
1770
1771
1772
1773 if (resp->opcnt < args->opcnt)
1774 plen += COMPOUND_ERR_SLACK_SPACE;
1775 op->status = nfsd4_check_resp_size(resp, plen);
1776 }
1777
1778 if (op->status)
1779 goto encode_op;
1780
1781 if (opdesc->op_get_currentstateid)
1782 opdesc->op_get_currentstateid(cstate, &op->u);
1783 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1784
1785 if (!op->status) {
1786 if (opdesc->op_set_currentstateid)
1787 opdesc->op_set_currentstateid(cstate, &op->u);
1788
1789 if (opdesc->op_flags & OP_CLEAR_STATEID)
1790 clear_current_stateid(cstate);
1791
1792 if (need_wrongsec_check(rqstp))
1793 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1794 }
1795
1796encode_op:
1797
1798 if (cstate->status == nfserr_replay_cache) {
1799 dprintk("%s NFS4.1 replay from cache\n", __func__);
1800 status = op->status;
1801 goto out;
1802 }
1803 if (op->status == nfserr_replay_me) {
1804 op->replay = &cstate->replay_owner->so_replay;
1805 nfsd4_encode_replay(&resp->xdr, op);
1806 status = op->status = op->replay->rp_status;
1807 } else {
1808 nfsd4_encode_operation(resp, op);
1809 status = op->status;
1810 }
1811
1812 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1813 args->ops, args->opcnt, resp->opcnt, op->opnum,
1814 be32_to_cpu(status));
1815
1816 nfsd4_cstate_clear_replay(cstate);
1817 nfsd4_increment_op_stats(op->opnum);
1818 }
1819
1820 cstate->status = status;
1821 fh_put(current_fh);
1822 fh_put(save_fh);
1823 BUG_ON(cstate->replay_owner);
1824out:
1825
1826 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1827 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1828 return status;
1829}
1830
1831#define op_encode_hdr_size (2)
1832#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1833#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1834#define op_encode_change_info_maxsz (5)
1835#define nfs4_fattr_bitmap_maxsz (4)
1836
1837
1838#define op_encode_lockowner_maxsz (0)
1839#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1840
1841#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1842
1843#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1844#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1845 op_encode_ace_maxsz)
1846
1847#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1848
1849static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1850{
1851 return (op_encode_hdr_size) * sizeof(__be32);
1852}
1853
1854static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1855{
1856 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1857}
1858
1859static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1860{
1861 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1862}
1863
1864static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1865{
1866 return (op_encode_hdr_size + op_encode_change_info_maxsz
1867 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1868}
1869
1870
1871
1872
1873
1874
1875static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1876 struct nfsd4_op *op)
1877{
1878 u32 *bmap = op->u.getattr.ga_bmval;
1879 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1880 u32 ret = 0;
1881
1882 if (bmap0 & FATTR4_WORD0_ACL)
1883 return svc_max_payload(rqstp);
1884 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1885 return svc_max_payload(rqstp);
1886
1887 if (bmap1 & FATTR4_WORD1_OWNER) {
1888 ret += IDMAP_NAMESZ + 4;
1889 bmap1 &= ~FATTR4_WORD1_OWNER;
1890 }
1891 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1892 ret += IDMAP_NAMESZ + 4;
1893 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1894 }
1895 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1896 ret += NFS4_FHSIZE + 4;
1897 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1898 }
1899 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1900 ret += NFS4_MAXLABELLEN + 12;
1901 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1902 }
1903
1904
1905
1906
1907 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1908
1909 ret += 20;
1910 return ret;
1911}
1912
1913static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1914{
1915 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1916 * sizeof(__be32);
1917}
1918
1919static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1920{
1921 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1922 * sizeof(__be32);
1923}
1924
1925static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1926{
1927 return (op_encode_hdr_size + op_encode_stateid_maxsz
1928 + op_encode_change_info_maxsz + 1
1929 + nfs4_fattr_bitmap_maxsz
1930 + op_encode_delegation_maxsz) * sizeof(__be32);
1931}
1932
1933static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1934{
1935 u32 maxcount = 0, rlen = 0;
1936
1937 maxcount = svc_max_payload(rqstp);
1938 rlen = min(op->u.read.rd_length, maxcount);
1939
1940 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1941}
1942
1943static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1944{
1945 u32 maxcount = 0, rlen = 0;
1946
1947 maxcount = svc_max_payload(rqstp);
1948 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1949
1950 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1951 XDR_QUADLEN(rlen)) * sizeof(__be32);
1952}
1953
1954static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1955{
1956 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1957 * sizeof(__be32);
1958}
1959
1960static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961{
1962 return (op_encode_hdr_size + op_encode_change_info_maxsz
1963 + op_encode_change_info_maxsz) * sizeof(__be32);
1964}
1965
1966static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1967 struct nfsd4_op *op)
1968{
1969 return (op_encode_hdr_size
1970 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1971}
1972
1973static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1974{
1975 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1976}
1977
1978static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1979{
1980 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1981 sizeof(__be32);
1982}
1983
1984static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1985{
1986 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
1987}
1988
1989static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1990{
1991 return (op_encode_hdr_size + 2 + 1 + \
1992 1 + 1 + \
1993 4 + \
1994 2 + \
1995 \
1996 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1997 \
1998 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1999 1 + \
2000 0 ) * sizeof(__be32);
2001}
2002
2003static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2004{
2005 return (op_encode_hdr_size + \
2006 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2007 2 ) * sizeof(__be32);
2008}
2009
2010static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2011{
2012 return (op_encode_hdr_size + \
2013 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2014 2 + \
2015 op_encode_channel_attrs_maxsz + \
2016 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2017}
2018
2019static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size +
2022 1 +
2023 op_encode_stateid_maxsz +
2024 2 +
2025 1 +
2026 op_encode_verifier_maxsz +
2027 1 +
2028 1 ) * sizeof(__be32);
2029}
2030
2031#ifdef CONFIG_NFSD_PNFS
2032
2033
2034
2035
2036#define MAX_LAYOUT_SIZE 128
2037static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2038{
2039 return (op_encode_hdr_size +
2040 1 +
2041 op_encode_stateid_maxsz +
2042 1 +
2043 MAX_LAYOUT_SIZE) * sizeof(__be32);
2044}
2045
2046static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2047{
2048 return (op_encode_hdr_size +
2049 1 +
2050 2 ) * sizeof(__be32);
2051}
2052
2053static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2054{
2055 return (op_encode_hdr_size +
2056 1 +
2057 op_encode_stateid_maxsz) * sizeof(__be32);
2058}
2059#endif
2060
2061static struct nfsd4_operation nfsd4_ops[] = {
2062 [OP_ACCESS] = {
2063 .op_func = (nfsd4op_func)nfsd4_access,
2064 .op_name = "OP_ACCESS",
2065 },
2066 [OP_CLOSE] = {
2067 .op_func = (nfsd4op_func)nfsd4_close,
2068 .op_flags = OP_MODIFIES_SOMETHING,
2069 .op_name = "OP_CLOSE",
2070 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2071 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2072 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
2073 },
2074 [OP_COMMIT] = {
2075 .op_func = (nfsd4op_func)nfsd4_commit,
2076 .op_flags = OP_MODIFIES_SOMETHING,
2077 .op_name = "OP_COMMIT",
2078 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
2079 },
2080 [OP_CREATE] = {
2081 .op_func = (nfsd4op_func)nfsd4_create,
2082 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2083 .op_name = "OP_CREATE",
2084 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
2085 },
2086 [OP_DELEGRETURN] = {
2087 .op_func = (nfsd4op_func)nfsd4_delegreturn,
2088 .op_flags = OP_MODIFIES_SOMETHING,
2089 .op_name = "OP_DELEGRETURN",
2090 .op_rsize_bop = nfsd4_only_status_rsize,
2091 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
2092 },
2093 [OP_GETATTR] = {
2094 .op_func = (nfsd4op_func)nfsd4_getattr,
2095 .op_flags = ALLOWED_ON_ABSENT_FS,
2096 .op_rsize_bop = nfsd4_getattr_rsize,
2097 .op_name = "OP_GETATTR",
2098 },
2099 [OP_GETFH] = {
2100 .op_func = (nfsd4op_func)nfsd4_getfh,
2101 .op_name = "OP_GETFH",
2102 },
2103 [OP_LINK] = {
2104 .op_func = (nfsd4op_func)nfsd4_link,
2105 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2106 | OP_CACHEME,
2107 .op_name = "OP_LINK",
2108 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
2109 },
2110 [OP_LOCK] = {
2111 .op_func = (nfsd4op_func)nfsd4_lock,
2112 .op_flags = OP_MODIFIES_SOMETHING,
2113 .op_name = "OP_LOCK",
2114 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
2115 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
2116 },
2117 [OP_LOCKT] = {
2118 .op_func = (nfsd4op_func)nfsd4_lockt,
2119 .op_name = "OP_LOCKT",
2120 },
2121 [OP_LOCKU] = {
2122 .op_func = (nfsd4op_func)nfsd4_locku,
2123 .op_flags = OP_MODIFIES_SOMETHING,
2124 .op_name = "OP_LOCKU",
2125 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2126 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
2127 },
2128 [OP_LOOKUP] = {
2129 .op_func = (nfsd4op_func)nfsd4_lookup,
2130 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2131 .op_name = "OP_LOOKUP",
2132 },
2133 [OP_LOOKUPP] = {
2134 .op_func = (nfsd4op_func)nfsd4_lookupp,
2135 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2136 .op_name = "OP_LOOKUPP",
2137 },
2138 [OP_NVERIFY] = {
2139 .op_func = (nfsd4op_func)nfsd4_nverify,
2140 .op_name = "OP_NVERIFY",
2141 },
2142 [OP_OPEN] = {
2143 .op_func = (nfsd4op_func)nfsd4_open,
2144 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2145 .op_name = "OP_OPEN",
2146 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
2147 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
2148 },
2149 [OP_OPEN_CONFIRM] = {
2150 .op_func = (nfsd4op_func)nfsd4_open_confirm,
2151 .op_flags = OP_MODIFIES_SOMETHING,
2152 .op_name = "OP_OPEN_CONFIRM",
2153 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2154 },
2155 [OP_OPEN_DOWNGRADE] = {
2156 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
2157 .op_flags = OP_MODIFIES_SOMETHING,
2158 .op_name = "OP_OPEN_DOWNGRADE",
2159 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2160 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2161 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
2162 },
2163 [OP_PUTFH] = {
2164 .op_func = (nfsd4op_func)nfsd4_putfh,
2165 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2166 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2167 .op_name = "OP_PUTFH",
2168 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2169 },
2170 [OP_PUTPUBFH] = {
2171 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2172 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2173 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2174 .op_name = "OP_PUTPUBFH",
2175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2176 },
2177 [OP_PUTROOTFH] = {
2178 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2179 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2180 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2181 .op_name = "OP_PUTROOTFH",
2182 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2183 },
2184 [OP_READ] = {
2185 .op_func = (nfsd4op_func)nfsd4_read,
2186 .op_name = "OP_READ",
2187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
2188 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
2189 },
2190 [OP_READDIR] = {
2191 .op_func = (nfsd4op_func)nfsd4_readdir,
2192 .op_name = "OP_READDIR",
2193 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
2194 },
2195 [OP_READLINK] = {
2196 .op_func = (nfsd4op_func)nfsd4_readlink,
2197 .op_name = "OP_READLINK",
2198 },
2199 [OP_REMOVE] = {
2200 .op_func = (nfsd4op_func)nfsd4_remove,
2201 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2202 .op_name = "OP_REMOVE",
2203 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
2204 },
2205 [OP_RENAME] = {
2206 .op_func = (nfsd4op_func)nfsd4_rename,
2207 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2208 .op_name = "OP_RENAME",
2209 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
2210 },
2211 [OP_RENEW] = {
2212 .op_func = (nfsd4op_func)nfsd4_renew,
2213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2214 | OP_MODIFIES_SOMETHING,
2215 .op_name = "OP_RENEW",
2216 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2217
2218 },
2219 [OP_RESTOREFH] = {
2220 .op_func = (nfsd4op_func)nfsd4_restorefh,
2221 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2222 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2223 .op_name = "OP_RESTOREFH",
2224 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2225 },
2226 [OP_SAVEFH] = {
2227 .op_func = (nfsd4op_func)nfsd4_savefh,
2228 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2229 .op_name = "OP_SAVEFH",
2230 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2231 },
2232 [OP_SECINFO] = {
2233 .op_func = (nfsd4op_func)nfsd4_secinfo,
2234 .op_flags = OP_HANDLES_WRONGSEC,
2235 .op_name = "OP_SECINFO",
2236 },
2237 [OP_SETATTR] = {
2238 .op_func = (nfsd4op_func)nfsd4_setattr,
2239 .op_name = "OP_SETATTR",
2240 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2241 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
2242 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
2243 },
2244 [OP_SETCLIENTID] = {
2245 .op_func = (nfsd4op_func)nfsd4_setclientid,
2246 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2247 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2248 .op_name = "OP_SETCLIENTID",
2249 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
2250 },
2251 [OP_SETCLIENTID_CONFIRM] = {
2252 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
2253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2254 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2255 .op_name = "OP_SETCLIENTID_CONFIRM",
2256 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2257 },
2258 [OP_VERIFY] = {
2259 .op_func = (nfsd4op_func)nfsd4_verify,
2260 .op_name = "OP_VERIFY",
2261 },
2262 [OP_WRITE] = {
2263 .op_func = (nfsd4op_func)nfsd4_write,
2264 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2265 .op_name = "OP_WRITE",
2266 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2267 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
2268 },
2269 [OP_RELEASE_LOCKOWNER] = {
2270 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
2271 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2272 | OP_MODIFIES_SOMETHING,
2273 .op_name = "OP_RELEASE_LOCKOWNER",
2274 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2275 },
2276
2277
2278 [OP_EXCHANGE_ID] = {
2279 .op_func = (nfsd4op_func)nfsd4_exchange_id,
2280 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2281 | OP_MODIFIES_SOMETHING,
2282 .op_name = "OP_EXCHANGE_ID",
2283 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
2284 },
2285 [OP_BACKCHANNEL_CTL] = {
2286 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2287 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2288 .op_name = "OP_BACKCHANNEL_CTL",
2289 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2290 },
2291 [OP_BIND_CONN_TO_SESSION] = {
2292 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
2293 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2294 | OP_MODIFIES_SOMETHING,
2295 .op_name = "OP_BIND_CONN_TO_SESSION",
2296 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
2297 },
2298 [OP_CREATE_SESSION] = {
2299 .op_func = (nfsd4op_func)nfsd4_create_session,
2300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2301 | OP_MODIFIES_SOMETHING,
2302 .op_name = "OP_CREATE_SESSION",
2303 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
2304 },
2305 [OP_DESTROY_SESSION] = {
2306 .op_func = (nfsd4op_func)nfsd4_destroy_session,
2307 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2308 | OP_MODIFIES_SOMETHING,
2309 .op_name = "OP_DESTROY_SESSION",
2310 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2311 },
2312 [OP_SEQUENCE] = {
2313 .op_func = (nfsd4op_func)nfsd4_sequence,
2314 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2315 .op_name = "OP_SEQUENCE",
2316 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
2317 },
2318 [OP_DESTROY_CLIENTID] = {
2319 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
2320 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2321 | OP_MODIFIES_SOMETHING,
2322 .op_name = "OP_DESTROY_CLIENTID",
2323 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2324 },
2325 [OP_RECLAIM_COMPLETE] = {
2326 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
2327 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2328 .op_name = "OP_RECLAIM_COMPLETE",
2329 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2330 },
2331 [OP_SECINFO_NO_NAME] = {
2332 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
2333 .op_flags = OP_HANDLES_WRONGSEC,
2334 .op_name = "OP_SECINFO_NO_NAME",
2335 },
2336 [OP_TEST_STATEID] = {
2337 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2338 .op_flags = ALLOWED_WITHOUT_FH,
2339 .op_name = "OP_TEST_STATEID",
2340 },
2341 [OP_FREE_STATEID] = {
2342 .op_func = (nfsd4op_func)nfsd4_free_stateid,
2343 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2344 .op_name = "OP_FREE_STATEID",
2345 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
2346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2347 },
2348#ifdef CONFIG_NFSD_PNFS
2349 [OP_GETDEVICEINFO] = {
2350 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2351 .op_flags = ALLOWED_WITHOUT_FH,
2352 .op_name = "OP_GETDEVICEINFO",
2353 },
2354 [OP_LAYOUTGET] = {
2355 .op_func = (nfsd4op_func)nfsd4_layoutget,
2356 .op_flags = OP_MODIFIES_SOMETHING,
2357 .op_name = "OP_LAYOUTGET",
2358 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2359 },
2360 [OP_LAYOUTCOMMIT] = {
2361 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2362 .op_flags = OP_MODIFIES_SOMETHING,
2363 .op_name = "OP_LAYOUTCOMMIT",
2364 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2365 },
2366 [OP_LAYOUTRETURN] = {
2367 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2368 .op_flags = OP_MODIFIES_SOMETHING,
2369 .op_name = "OP_LAYOUTRETURN",
2370 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2371 },
2372#endif
2373
2374
2375 [OP_ALLOCATE] = {
2376 .op_func = (nfsd4op_func)nfsd4_allocate,
2377 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2378 .op_name = "OP_ALLOCATE",
2379 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2380 },
2381 [OP_DEALLOCATE] = {
2382 .op_func = (nfsd4op_func)nfsd4_deallocate,
2383 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2384 .op_name = "OP_DEALLOCATE",
2385 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2386 },
2387 [OP_CLONE] = {
2388 .op_func = (nfsd4op_func)nfsd4_clone,
2389 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2390 .op_name = "OP_CLONE",
2391 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2392 },
2393 [OP_COPY] = {
2394 .op_func = (nfsd4op_func)nfsd4_copy,
2395 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2396 .op_name = "OP_COPY",
2397 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2398 },
2399 [OP_SEEK] = {
2400 .op_func = (nfsd4op_func)nfsd4_seek,
2401 .op_name = "OP_SEEK",
2402 },
2403};
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2416{
2417 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2418 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2419 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2420 struct nfsd4_compound_state *cstate = &resp->cstate;
2421 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2422 u32 opiter;
2423
2424 if (!cstate->minorversion)
2425 return false;
2426
2427 if (cstate->spo_must_allowed == true)
2428 return true;
2429
2430 opiter = resp->opcnt;
2431 while (opiter < argp->opcnt) {
2432 this = &argp->ops[opiter++];
2433 if (test_bit(this->opnum, allow->u.longs) &&
2434 cstate->clp->cl_mach_cred &&
2435 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2436 cstate->spo_must_allowed = true;
2437 return true;
2438 }
2439 }
2440 cstate->spo_must_allowed = false;
2441 return false;
2442}
2443
2444int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2445{
2446 struct nfsd4_operation *opdesc;
2447 nfsd4op_rsize estimator;
2448
2449 if (op->opnum == OP_ILLEGAL)
2450 return op_encode_hdr_size * sizeof(__be32);
2451 opdesc = OPDESC(op);
2452 estimator = opdesc->op_rsize_bop;
2453 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2454}
2455
2456void warn_on_nonidempotent_op(struct nfsd4_op *op)
2457{
2458 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2459 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2460 op->opnum, nfsd4_op_name(op->opnum));
2461 WARN_ON_ONCE(1);
2462 }
2463}
2464
2465static const char *nfsd4_op_name(unsigned opnum)
2466{
2467 if (opnum < ARRAY_SIZE(nfsd4_ops))
2468 return nfsd4_ops[opnum].op_name;
2469 return "unknown_operation";
2470}
2471
2472#define nfsd4_voidres nfsd4_voidargs
2473struct nfsd4_voidargs { int dummy; };
2474
2475static struct svc_procedure nfsd_procedures4[2] = {
2476 [NFSPROC4_NULL] = {
2477 .pc_func = (svc_procfunc) nfsd4_proc_null,
2478 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2479 .pc_argsize = sizeof(struct nfsd4_voidargs),
2480 .pc_ressize = sizeof(struct nfsd4_voidres),
2481 .pc_cachetype = RC_NOCACHE,
2482 .pc_xdrressize = 1,
2483 },
2484 [NFSPROC4_COMPOUND] = {
2485 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2486 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2487 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2488 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2489 .pc_ressize = sizeof(struct nfsd4_compoundres),
2490 .pc_release = nfsd4_release_compoundargs,
2491 .pc_cachetype = RC_NOCACHE,
2492 .pc_xdrressize = NFSD_BUFSIZE/4,
2493 },
2494};
2495
2496struct svc_version nfsd_version4 = {
2497 .vs_vers = 4,
2498 .vs_nproc = 2,
2499 .vs_proc = nfsd_procedures4,
2500 .vs_dispatch = nfsd_dispatch,
2501 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2502 .vs_rpcb_optnl = 1,
2503};
2504
2505
2506
2507
2508
2509
2510