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1/*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35#include <linux/file.h>
36#include <linux/slab.h>
37
38#include "cache.h"
39#include "xdr4.h"
40#include "vfs.h"
41
42#define NFSDDBG_FACILITY NFSDDBG_PROC
43
44static u32 nfsd_attrmask[] = {
45 NFSD_WRITEABLE_ATTRS_WORD0,
46 NFSD_WRITEABLE_ATTRS_WORD1,
47 NFSD_WRITEABLE_ATTRS_WORD2
48};
49
50static u32 nfsd41_ex_attrmask[] = {
51 NFSD_SUPPATTR_EXCLCREAT_WORD0,
52 NFSD_SUPPATTR_EXCLCREAT_WORD1,
53 NFSD_SUPPATTR_EXCLCREAT_WORD2
54};
55
56static __be32
57check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
58 u32 *bmval, u32 *writable)
59{
60 struct dentry *dentry = cstate->current_fh.fh_dentry;
61
62 /*
63 * Check about attributes are supported by the NFSv4 server or not.
64 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
65 */
66 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
67 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
68 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
69 return nfserr_attrnotsupp;
70
71 /*
72 * Check FATTR4_WORD0_ACL can be supported
73 * in current environment or not.
74 */
75 if (bmval[0] & FATTR4_WORD0_ACL) {
76 if (!IS_POSIXACL(dentry->d_inode))
77 return nfserr_attrnotsupp;
78 }
79
80 /*
81 * According to spec, read-only attributes return ERR_INVAL.
82 */
83 if (writable) {
84 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
85 (bmval[2] & ~writable[2]))
86 return nfserr_inval;
87 }
88
89 return nfs_ok;
90}
91
92static __be32
93nfsd4_check_open_attributes(struct svc_rqst *rqstp,
94 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
95{
96 __be32 status = nfs_ok;
97
98 if (open->op_create == NFS4_OPEN_CREATE) {
99 if (open->op_createmode == NFS4_CREATE_UNCHECKED
100 || open->op_createmode == NFS4_CREATE_GUARDED)
101 status = check_attr_support(rqstp, cstate,
102 open->op_bmval, nfsd_attrmask);
103 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd41_ex_attrmask);
106 }
107
108 return status;
109}
110
111static int
112is_create_with_attrs(struct nfsd4_open *open)
113{
114 return open->op_create == NFS4_OPEN_CREATE
115 && (open->op_createmode == NFS4_CREATE_UNCHECKED
116 || open->op_createmode == NFS4_CREATE_GUARDED
117 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
118}
119
120/*
121 * if error occurs when setting the acl, just clear the acl bit
122 * in the returned attr bitmap.
123 */
124static void
125do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
126 struct nfs4_acl *acl, u32 *bmval)
127{
128 __be32 status;
129
130 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
131 if (status)
132 /*
133 * We should probably fail the whole open at this point,
134 * but we've already created the file, so it's too late;
135 * So this seems the least of evils:
136 */
137 bmval[0] &= ~FATTR4_WORD0_ACL;
138}
139
140static inline void
141fh_dup2(struct svc_fh *dst, struct svc_fh *src)
142{
143 fh_put(dst);
144 dget(src->fh_dentry);
145 if (src->fh_export)
146 cache_get(&src->fh_export->h);
147 *dst = *src;
148}
149
150static __be32
151do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
152{
153 __be32 status;
154
155 if (open->op_truncate &&
156 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
157 return nfserr_inval;
158
159 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
160 accmode |= NFSD_MAY_READ;
161 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
162 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
163 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
164 accmode |= NFSD_MAY_WRITE;
165
166 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
167
168 return status;
169}
170
171static __be32
172do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
173{
174 struct svc_fh resfh;
175 __be32 status;
176 int created = 0;
177
178 fh_init(&resfh, NFS4_FHSIZE);
179 open->op_truncate = 0;
180
181 if (open->op_create) {
182 /* FIXME: check session persistence and pnfs flags.
183 * The nfsv4.1 spec requires the following semantics:
184 *
185 * Persistent | pNFS | Server REQUIRED | Client Allowed
186 * Reply Cache | server | |
187 * -------------+--------+-----------------+--------------------
188 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
189 * | | | (SHOULD)
190 * | | and EXCLUSIVE4 | or EXCLUSIVE4
191 * | | | (SHOULD NOT)
192 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
193 * yes | no | GUARDED4 | GUARDED4
194 * yes | yes | GUARDED4 | GUARDED4
195 */
196
197 /*
198 * Note: create modes (UNCHECKED,GUARDED...) are the same
199 * in NFSv4 as in v3 except EXCLUSIVE4_1.
200 */
201 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
202 open->op_fname.len, &open->op_iattr,
203 &resfh, open->op_createmode,
204 (u32 *)open->op_verf.data,
205 &open->op_truncate, &created);
206
207 /*
208 * Following rfc 3530 14.2.16, use the returned bitmask
209 * to indicate which attributes we used to store the
210 * verifier:
211 */
212 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
213 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
214 FATTR4_WORD1_TIME_MODIFY);
215 } else {
216 status = nfsd_lookup(rqstp, current_fh,
217 open->op_fname.data, open->op_fname.len, &resfh);
218 fh_unlock(current_fh);
219 }
220 if (status)
221 goto out;
222
223 if (is_create_with_attrs(open) && open->op_acl != NULL)
224 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
225
226 set_change_info(&open->op_cinfo, current_fh);
227 fh_dup2(current_fh, &resfh);
228
229 /* set reply cache */
230 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
231 &resfh.fh_handle);
232 if (!created)
233 status = do_open_permission(rqstp, current_fh, open,
234 NFSD_MAY_NOP);
235
236out:
237 fh_put(&resfh);
238 return status;
239}
240
241static __be32
242do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
243{
244 __be32 status;
245
246 /* Only reclaims from previously confirmed clients are valid */
247 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
248 return status;
249
250 /* We don't know the target directory, and therefore can not
251 * set the change info
252 */
253
254 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
255
256 /* set replay cache */
257 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
258 ¤t_fh->fh_handle);
259
260 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
261 (open->op_iattr.ia_size == 0);
262
263 status = do_open_permission(rqstp, current_fh, open,
264 NFSD_MAY_OWNER_OVERRIDE);
265
266 return status;
267}
268
269static void
270copy_clientid(clientid_t *clid, struct nfsd4_session *session)
271{
272 struct nfsd4_sessionid *sid =
273 (struct nfsd4_sessionid *)session->se_sessionid.data;
274
275 clid->cl_boot = sid->clientid.cl_boot;
276 clid->cl_id = sid->clientid.cl_id;
277}
278
279static __be32
280nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
281 struct nfsd4_open *open)
282{
283 __be32 status;
284 struct nfsd4_compoundres *resp;
285
286 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
287 (int)open->op_fname.len, open->op_fname.data,
288 open->op_stateowner);
289
290 /* This check required by spec. */
291 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
292 return nfserr_inval;
293
294 /*
295 * RFC5661 18.51.3
296 * Before RECLAIM_COMPLETE done, server should deny new lock
297 */
298 if (nfsd4_has_session(cstate) &&
299 !cstate->session->se_client->cl_firststate &&
300 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
301 return nfserr_grace;
302
303 if (nfsd4_has_session(cstate))
304 copy_clientid(&open->op_clientid, cstate->session);
305
306 nfs4_lock_state();
307
308 /* check seqid for replay. set nfs4_owner */
309 resp = rqstp->rq_resp;
310 status = nfsd4_process_open1(&resp->cstate, open);
311 if (status == nfserr_replay_me) {
312 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
313 fh_put(&cstate->current_fh);
314 fh_copy_shallow(&cstate->current_fh.fh_handle,
315 &rp->rp_openfh);
316 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
317 if (status)
318 dprintk("nfsd4_open: replay failed"
319 " restoring previous filehandle\n");
320 else
321 status = nfserr_replay_me;
322 }
323 if (status)
324 goto out;
325
326 status = nfsd4_check_open_attributes(rqstp, cstate, open);
327 if (status)
328 goto out;
329
330 /* Openowner is now set, so sequence id will get bumped. Now we need
331 * these checks before we do any creates: */
332 status = nfserr_grace;
333 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
334 goto out;
335 status = nfserr_no_grace;
336 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
337 goto out;
338
339 switch (open->op_claim_type) {
340 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
341 case NFS4_OPEN_CLAIM_NULL:
342 /*
343 * (1) set CURRENT_FH to the file being opened,
344 * creating it if necessary, (2) set open->op_cinfo,
345 * (3) set open->op_truncate if the file is to be
346 * truncated after opening, (4) do permission checking.
347 */
348 status = do_open_lookup(rqstp, &cstate->current_fh,
349 open);
350 if (status)
351 goto out;
352 break;
353 case NFS4_OPEN_CLAIM_PREVIOUS:
354 open->op_stateowner->so_confirmed = 1;
355 /*
356 * The CURRENT_FH is already set to the file being
357 * opened. (1) set open->op_cinfo, (2) set
358 * open->op_truncate if the file is to be truncated
359 * after opening, (3) do permission checking.
360 */
361 status = do_open_fhandle(rqstp, &cstate->current_fh,
362 open);
363 if (status)
364 goto out;
365 break;
366 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
367 open->op_stateowner->so_confirmed = 1;
368 dprintk("NFSD: unsupported OPEN claim type %d\n",
369 open->op_claim_type);
370 status = nfserr_notsupp;
371 goto out;
372 default:
373 dprintk("NFSD: Invalid OPEN claim type %d\n",
374 open->op_claim_type);
375 status = nfserr_inval;
376 goto out;
377 }
378 /*
379 * nfsd4_process_open2() does the actual opening of the file. If
380 * successful, it (1) truncates the file if open->op_truncate was
381 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
382 */
383 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
384out:
385 if (open->op_stateowner) {
386 nfs4_get_stateowner(open->op_stateowner);
387 cstate->replay_owner = open->op_stateowner;
388 }
389 nfs4_unlock_state();
390 return status;
391}
392
393/*
394 * filehandle-manipulating ops.
395 */
396static __be32
397nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
398 struct svc_fh **getfh)
399{
400 if (!cstate->current_fh.fh_dentry)
401 return nfserr_nofilehandle;
402
403 *getfh = &cstate->current_fh;
404 return nfs_ok;
405}
406
407static __be32
408nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
409 struct nfsd4_putfh *putfh)
410{
411 fh_put(&cstate->current_fh);
412 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
413 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
414 putfh->pf_fhlen);
415 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
416}
417
418static __be32
419nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
420 void *arg)
421{
422 __be32 status;
423
424 fh_put(&cstate->current_fh);
425 status = exp_pseudoroot(rqstp, &cstate->current_fh);
426 return status;
427}
428
429static __be32
430nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
431 void *arg)
432{
433 if (!cstate->save_fh.fh_dentry)
434 return nfserr_restorefh;
435
436 fh_dup2(&cstate->current_fh, &cstate->save_fh);
437 return nfs_ok;
438}
439
440static __be32
441nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
442 void *arg)
443{
444 if (!cstate->current_fh.fh_dentry)
445 return nfserr_nofilehandle;
446
447 fh_dup2(&cstate->save_fh, &cstate->current_fh);
448 return nfs_ok;
449}
450
451/*
452 * misc nfsv4 ops
453 */
454static __be32
455nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
456 struct nfsd4_access *access)
457{
458 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
459 return nfserr_inval;
460
461 access->ac_resp_access = access->ac_req_access;
462 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
463 &access->ac_supported);
464}
465
466static __be32
467nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
468 struct nfsd4_commit *commit)
469{
470 __be32 status;
471
472 u32 *p = (u32 *)commit->co_verf.data;
473 *p++ = nfssvc_boot.tv_sec;
474 *p++ = nfssvc_boot.tv_usec;
475
476 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
477 commit->co_count);
478 if (status == nfserr_symlink)
479 status = nfserr_inval;
480 return status;
481}
482
483static __be32
484nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
485 struct nfsd4_create *create)
486{
487 struct svc_fh resfh;
488 __be32 status;
489 dev_t rdev;
490
491 fh_init(&resfh, NFS4_FHSIZE);
492
493 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
494 NFSD_MAY_CREATE);
495 if (status == nfserr_symlink)
496 status = nfserr_notdir;
497 if (status)
498 return status;
499
500 status = check_attr_support(rqstp, cstate, create->cr_bmval,
501 nfsd_attrmask);
502 if (status)
503 return status;
504
505 switch (create->cr_type) {
506 case NF4LNK:
507 /* ugh! we have to null-terminate the linktext, or
508 * vfs_symlink() will choke. it is always safe to
509 * null-terminate by brute force, since at worst we
510 * will overwrite the first byte of the create namelen
511 * in the XDR buffer, which has already been extracted
512 * during XDR decode.
513 */
514 create->cr_linkname[create->cr_linklen] = 0;
515
516 status = nfsd_symlink(rqstp, &cstate->current_fh,
517 create->cr_name, create->cr_namelen,
518 create->cr_linkname, create->cr_linklen,
519 &resfh, &create->cr_iattr);
520 break;
521
522 case NF4BLK:
523 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
524 if (MAJOR(rdev) != create->cr_specdata1 ||
525 MINOR(rdev) != create->cr_specdata2)
526 return nfserr_inval;
527 status = nfsd_create(rqstp, &cstate->current_fh,
528 create->cr_name, create->cr_namelen,
529 &create->cr_iattr, S_IFBLK, rdev, &resfh);
530 break;
531
532 case NF4CHR:
533 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
534 if (MAJOR(rdev) != create->cr_specdata1 ||
535 MINOR(rdev) != create->cr_specdata2)
536 return nfserr_inval;
537 status = nfsd_create(rqstp, &cstate->current_fh,
538 create->cr_name, create->cr_namelen,
539 &create->cr_iattr,S_IFCHR, rdev, &resfh);
540 break;
541
542 case NF4SOCK:
543 status = nfsd_create(rqstp, &cstate->current_fh,
544 create->cr_name, create->cr_namelen,
545 &create->cr_iattr, S_IFSOCK, 0, &resfh);
546 break;
547
548 case NF4FIFO:
549 status = nfsd_create(rqstp, &cstate->current_fh,
550 create->cr_name, create->cr_namelen,
551 &create->cr_iattr, S_IFIFO, 0, &resfh);
552 break;
553
554 case NF4DIR:
555 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
556 status = nfsd_create(rqstp, &cstate->current_fh,
557 create->cr_name, create->cr_namelen,
558 &create->cr_iattr, S_IFDIR, 0, &resfh);
559 break;
560
561 default:
562 status = nfserr_badtype;
563 }
564
565 if (status)
566 goto out;
567
568 if (create->cr_acl != NULL)
569 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
570 create->cr_bmval);
571
572 fh_unlock(&cstate->current_fh);
573 set_change_info(&create->cr_cinfo, &cstate->current_fh);
574 fh_dup2(&cstate->current_fh, &resfh);
575out:
576 fh_put(&resfh);
577 return status;
578}
579
580static __be32
581nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 struct nfsd4_getattr *getattr)
583{
584 __be32 status;
585
586 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
587 if (status)
588 return status;
589
590 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
591 return nfserr_inval;
592
593 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
594 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
595 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
596
597 getattr->ga_fhp = &cstate->current_fh;
598 return nfs_ok;
599}
600
601static __be32
602nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
603 struct nfsd4_link *link)
604{
605 __be32 status = nfserr_nofilehandle;
606
607 if (!cstate->save_fh.fh_dentry)
608 return status;
609 status = nfsd_link(rqstp, &cstate->current_fh,
610 link->li_name, link->li_namelen, &cstate->save_fh);
611 if (!status)
612 set_change_info(&link->li_cinfo, &cstate->current_fh);
613 return status;
614}
615
616static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
617{
618 struct svc_fh tmp_fh;
619 __be32 ret;
620
621 fh_init(&tmp_fh, NFS4_FHSIZE);
622 ret = exp_pseudoroot(rqstp, &tmp_fh);
623 if (ret)
624 return ret;
625 if (tmp_fh.fh_dentry == fh->fh_dentry) {
626 fh_put(&tmp_fh);
627 return nfserr_noent;
628 }
629 fh_put(&tmp_fh);
630 return nfsd_lookup(rqstp, fh, "..", 2, fh);
631}
632
633static __be32
634nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
635 void *arg)
636{
637 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
638}
639
640static __be32
641nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
642 struct nfsd4_lookup *lookup)
643{
644 return nfsd_lookup(rqstp, &cstate->current_fh,
645 lookup->lo_name, lookup->lo_len,
646 &cstate->current_fh);
647}
648
649static __be32
650nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
651 struct nfsd4_read *read)
652{
653 __be32 status;
654
655 /* no need to check permission - this will be done in nfsd_read() */
656
657 read->rd_filp = NULL;
658 if (read->rd_offset >= OFFSET_MAX)
659 return nfserr_inval;
660
661 nfs4_lock_state();
662 /* check stateid */
663 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
664 RD_STATE, &read->rd_filp))) {
665 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
666 goto out;
667 }
668 if (read->rd_filp)
669 get_file(read->rd_filp);
670 status = nfs_ok;
671out:
672 nfs4_unlock_state();
673 read->rd_rqstp = rqstp;
674 read->rd_fhp = &cstate->current_fh;
675 return status;
676}
677
678static __be32
679nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
680 struct nfsd4_readdir *readdir)
681{
682 u64 cookie = readdir->rd_cookie;
683 static const nfs4_verifier zeroverf;
684
685 /* no need to check permission - this will be done in nfsd_readdir() */
686
687 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
688 return nfserr_inval;
689
690 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
691 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
692 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
693
694 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
695 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
696 return nfserr_bad_cookie;
697
698 readdir->rd_rqstp = rqstp;
699 readdir->rd_fhp = &cstate->current_fh;
700 return nfs_ok;
701}
702
703static __be32
704nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
705 struct nfsd4_readlink *readlink)
706{
707 readlink->rl_rqstp = rqstp;
708 readlink->rl_fhp = &cstate->current_fh;
709 return nfs_ok;
710}
711
712static __be32
713nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
714 struct nfsd4_remove *remove)
715{
716 __be32 status;
717
718 if (locks_in_grace())
719 return nfserr_grace;
720 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
721 remove->rm_name, remove->rm_namelen);
722 if (status == nfserr_symlink)
723 return nfserr_notdir;
724 if (!status) {
725 fh_unlock(&cstate->current_fh);
726 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
727 }
728 return status;
729}
730
731static __be32
732nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
733 struct nfsd4_rename *rename)
734{
735 __be32 status = nfserr_nofilehandle;
736
737 if (!cstate->save_fh.fh_dentry)
738 return status;
739 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
740 & NFSEXP_NOSUBTREECHECK))
741 return nfserr_grace;
742 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
743 rename->rn_snamelen, &cstate->current_fh,
744 rename->rn_tname, rename->rn_tnamelen);
745
746 /* the underlying filesystem returns different error's than required
747 * by NFSv4. both save_fh and current_fh have been verified.. */
748 if (status == nfserr_isdir)
749 status = nfserr_exist;
750 else if ((status == nfserr_notdir) &&
751 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
752 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
753 status = nfserr_exist;
754 else if (status == nfserr_symlink)
755 status = nfserr_notdir;
756
757 if (!status) {
758 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
759 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
760 }
761 return status;
762}
763
764static __be32
765nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
766 struct nfsd4_secinfo *secinfo)
767{
768 struct svc_fh resfh;
769 struct svc_export *exp;
770 struct dentry *dentry;
771 __be32 err;
772
773 fh_init(&resfh, NFS4_FHSIZE);
774 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
775 if (err)
776 return err;
777 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
778 secinfo->si_name, secinfo->si_namelen,
779 &exp, &dentry);
780 if (err)
781 return err;
782 if (dentry->d_inode == NULL) {
783 exp_put(exp);
784 err = nfserr_noent;
785 } else
786 secinfo->si_exp = exp;
787 dput(dentry);
788 if (cstate->minorversion)
789 /* See rfc 5661 section 2.6.3.1.1.8 */
790 fh_put(&cstate->current_fh);
791 return err;
792}
793
794static __be32
795nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
796 struct nfsd4_secinfo_no_name *sin)
797{
798 __be32 err;
799
800 switch (sin->sin_style) {
801 case NFS4_SECINFO_STYLE4_CURRENT_FH:
802 break;
803 case NFS4_SECINFO_STYLE4_PARENT:
804 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
805 if (err)
806 return err;
807 break;
808 default:
809 return nfserr_inval;
810 }
811 exp_get(cstate->current_fh.fh_export);
812 sin->sin_exp = cstate->current_fh.fh_export;
813 fh_put(&cstate->current_fh);
814 return nfs_ok;
815}
816
817static __be32
818nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
819 struct nfsd4_setattr *setattr)
820{
821 __be32 status = nfs_ok;
822
823 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
824 nfs4_lock_state();
825 status = nfs4_preprocess_stateid_op(cstate,
826 &setattr->sa_stateid, WR_STATE, NULL);
827 nfs4_unlock_state();
828 if (status) {
829 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
830 return status;
831 }
832 }
833 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
834 if (status)
835 return status;
836 status = nfs_ok;
837
838 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
839 nfsd_attrmask);
840 if (status)
841 goto out;
842
843 if (setattr->sa_acl != NULL)
844 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
845 setattr->sa_acl);
846 if (status)
847 goto out;
848 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
849 0, (time_t)0);
850out:
851 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
852 return status;
853}
854
855static __be32
856nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
857 struct nfsd4_write *write)
858{
859 stateid_t *stateid = &write->wr_stateid;
860 struct file *filp = NULL;
861 u32 *p;
862 __be32 status = nfs_ok;
863 unsigned long cnt;
864
865 /* no need to check permission - this will be done in nfsd_write() */
866
867 if (write->wr_offset >= OFFSET_MAX)
868 return nfserr_inval;
869
870 nfs4_lock_state();
871 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
872 if (filp)
873 get_file(filp);
874 nfs4_unlock_state();
875
876 if (status) {
877 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
878 return status;
879 }
880
881 cnt = write->wr_buflen;
882 write->wr_how_written = write->wr_stable_how;
883 p = (u32 *)write->wr_verifier.data;
884 *p++ = nfssvc_boot.tv_sec;
885 *p++ = nfssvc_boot.tv_usec;
886
887 status = nfsd_write(rqstp, &cstate->current_fh, filp,
888 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
889 &cnt, &write->wr_how_written);
890 if (filp)
891 fput(filp);
892
893 write->wr_bytes_written = cnt;
894
895 if (status == nfserr_symlink)
896 status = nfserr_inval;
897 return status;
898}
899
900/* This routine never returns NFS_OK! If there are no other errors, it
901 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
902 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
903 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
904 */
905static __be32
906_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
907 struct nfsd4_verify *verify)
908{
909 __be32 *buf, *p;
910 int count;
911 __be32 status;
912
913 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
914 if (status)
915 return status;
916
917 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
918 if (status)
919 return status;
920
921 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
922 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
923 return nfserr_inval;
924 if (verify->ve_attrlen & 3)
925 return nfserr_inval;
926
927 /* count in words:
928 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
929 */
930 count = 4 + (verify->ve_attrlen >> 2);
931 buf = kmalloc(count << 2, GFP_KERNEL);
932 if (!buf)
933 return nfserr_resource;
934
935 status = nfsd4_encode_fattr(&cstate->current_fh,
936 cstate->current_fh.fh_export,
937 cstate->current_fh.fh_dentry, buf,
938 &count, verify->ve_bmval,
939 rqstp, 0);
940
941 /* this means that nfsd4_encode_fattr() ran out of space */
942 if (status == nfserr_resource && count == 0)
943 status = nfserr_not_same;
944 if (status)
945 goto out_kfree;
946
947 /* skip bitmap */
948 p = buf + 1 + ntohl(buf[0]);
949 status = nfserr_not_same;
950 if (ntohl(*p++) != verify->ve_attrlen)
951 goto out_kfree;
952 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
953 status = nfserr_same;
954
955out_kfree:
956 kfree(buf);
957 return status;
958}
959
960static __be32
961nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
962 struct nfsd4_verify *verify)
963{
964 __be32 status;
965
966 status = _nfsd4_verify(rqstp, cstate, verify);
967 return status == nfserr_not_same ? nfs_ok : status;
968}
969
970static __be32
971nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
972 struct nfsd4_verify *verify)
973{
974 __be32 status;
975
976 status = _nfsd4_verify(rqstp, cstate, verify);
977 return status == nfserr_same ? nfs_ok : status;
978}
979
980/*
981 * NULL call.
982 */
983static __be32
984nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
985{
986 return nfs_ok;
987}
988
989static inline void nfsd4_increment_op_stats(u32 opnum)
990{
991 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
992 nfsdstats.nfs4_opcount[opnum]++;
993}
994
995typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
996 void *);
997enum nfsd4_op_flags {
998 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
999 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1000 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1001 /* For rfc 5661 section 2.6.3.1.1: */
1002 OP_HANDLES_WRONGSEC = 1 << 3,
1003 OP_IS_PUTFH_LIKE = 1 << 4,
1004};
1005
1006struct nfsd4_operation {
1007 nfsd4op_func op_func;
1008 u32 op_flags;
1009 char *op_name;
1010 /*
1011 * We use the DRC for compounds containing non-idempotent
1012 * operations, *except* those that are 4.1-specific (since
1013 * sessions provide their own EOS), and except for stateful
1014 * operations other than setclientid and setclientid_confirm
1015 * (since sequence numbers provide EOS for open, lock, etc in
1016 * the v4.0 case).
1017 */
1018 bool op_cacheresult;
1019};
1020
1021static struct nfsd4_operation nfsd4_ops[];
1022
1023static const char *nfsd4_op_name(unsigned opnum);
1024
1025/*
1026 * Enforce NFSv4.1 COMPOUND ordering rules:
1027 *
1028 * Also note, enforced elsewhere:
1029 * - SEQUENCE other than as first op results in
1030 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1031 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1032 * (Enforced in nfsd4_bind_conn_to_session().)
1033 * - DESTROY_SESSION must be the final operation in a compound, if
1034 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1035 * (Enforced in nfsd4_destroy_session().)
1036 */
1037static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1038{
1039 struct nfsd4_op *op = &args->ops[0];
1040
1041 /* These ordering requirements don't apply to NFSv4.0: */
1042 if (args->minorversion == 0)
1043 return nfs_ok;
1044 /* This is weird, but OK, not our problem: */
1045 if (args->opcnt == 0)
1046 return nfs_ok;
1047 if (op->status == nfserr_op_illegal)
1048 return nfs_ok;
1049 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1050 return nfserr_op_not_in_session;
1051 if (op->opnum == OP_SEQUENCE)
1052 return nfs_ok;
1053 if (args->opcnt != 1)
1054 return nfserr_not_only_op;
1055 return nfs_ok;
1056}
1057
1058static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1059{
1060 return &nfsd4_ops[op->opnum];
1061}
1062
1063bool nfsd4_cache_this_op(struct nfsd4_op *op)
1064{
1065 return OPDESC(op)->op_cacheresult;
1066}
1067
1068static bool need_wrongsec_check(struct svc_rqst *rqstp)
1069{
1070 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1071 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1072 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1073 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1074 struct nfsd4_operation *thisd;
1075 struct nfsd4_operation *nextd;
1076
1077 thisd = OPDESC(this);
1078 /*
1079 * Most ops check wronsec on our own; only the putfh-like ops
1080 * have special rules.
1081 */
1082 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1083 return false;
1084 /*
1085 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1086 * put-filehandle operation if we're not going to use the
1087 * result:
1088 */
1089 if (argp->opcnt == resp->opcnt)
1090 return false;
1091
1092 nextd = OPDESC(next);
1093 /*
1094 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1095 * errors themselves as necessary; others should check for them
1096 * now:
1097 */
1098 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1099}
1100
1101/*
1102 * COMPOUND call.
1103 */
1104static __be32
1105nfsd4_proc_compound(struct svc_rqst *rqstp,
1106 struct nfsd4_compoundargs *args,
1107 struct nfsd4_compoundres *resp)
1108{
1109 struct nfsd4_op *op;
1110 struct nfsd4_operation *opdesc;
1111 struct nfsd4_compound_state *cstate = &resp->cstate;
1112 int slack_bytes;
1113 __be32 status;
1114
1115 resp->xbuf = &rqstp->rq_res;
1116 resp->p = rqstp->rq_res.head[0].iov_base +
1117 rqstp->rq_res.head[0].iov_len;
1118 resp->tagp = resp->p;
1119 /* reserve space for: taglen, tag, and opcnt */
1120 resp->p += 2 + XDR_QUADLEN(args->taglen);
1121 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1122 resp->taglen = args->taglen;
1123 resp->tag = args->tag;
1124 resp->opcnt = 0;
1125 resp->rqstp = rqstp;
1126 resp->cstate.minorversion = args->minorversion;
1127 resp->cstate.replay_owner = NULL;
1128 resp->cstate.session = NULL;
1129 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1130 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1131 /*
1132 * Don't use the deferral mechanism for NFSv4; compounds make it
1133 * too hard to avoid non-idempotency problems.
1134 */
1135 rqstp->rq_usedeferral = 0;
1136
1137 /*
1138 * According to RFC3010, this takes precedence over all other errors.
1139 */
1140 status = nfserr_minor_vers_mismatch;
1141 if (args->minorversion > nfsd_supported_minorversion)
1142 goto out;
1143
1144 status = nfs41_check_op_ordering(args);
1145 if (status) {
1146 op = &args->ops[0];
1147 op->status = status;
1148 goto encode_op;
1149 }
1150
1151 while (!status && resp->opcnt < args->opcnt) {
1152 op = &args->ops[resp->opcnt++];
1153
1154 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1155 resp->opcnt, args->opcnt, op->opnum,
1156 nfsd4_op_name(op->opnum));
1157 /*
1158 * The XDR decode routines may have pre-set op->status;
1159 * for example, if there is a miscellaneous XDR error
1160 * it will be set to nfserr_bad_xdr.
1161 */
1162 if (op->status)
1163 goto encode_op;
1164
1165 /* We must be able to encode a successful response to
1166 * this operation, with enough room left over to encode a
1167 * failed response to the next operation. If we don't
1168 * have enough room, fail with ERR_RESOURCE.
1169 */
1170 slack_bytes = (char *)resp->end - (char *)resp->p;
1171 if (slack_bytes < COMPOUND_SLACK_SPACE
1172 + COMPOUND_ERR_SLACK_SPACE) {
1173 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1174 op->status = nfserr_resource;
1175 goto encode_op;
1176 }
1177
1178 opdesc = OPDESC(op);
1179
1180 if (!cstate->current_fh.fh_dentry) {
1181 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1182 op->status = nfserr_nofilehandle;
1183 goto encode_op;
1184 }
1185 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1186 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1187 op->status = nfserr_moved;
1188 goto encode_op;
1189 }
1190
1191 if (opdesc->op_func)
1192 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1193 else
1194 BUG_ON(op->status == nfs_ok);
1195
1196 if (!op->status && need_wrongsec_check(rqstp))
1197 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1198
1199encode_op:
1200 /* Only from SEQUENCE */
1201 if (resp->cstate.status == nfserr_replay_cache) {
1202 dprintk("%s NFS4.1 replay from cache\n", __func__);
1203 status = op->status;
1204 goto out;
1205 }
1206 if (op->status == nfserr_replay_me) {
1207 op->replay = &cstate->replay_owner->so_replay;
1208 nfsd4_encode_replay(resp, op);
1209 status = op->status = op->replay->rp_status;
1210 } else {
1211 nfsd4_encode_operation(resp, op);
1212 status = op->status;
1213 }
1214
1215 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1216 args->ops, args->opcnt, resp->opcnt, op->opnum,
1217 be32_to_cpu(status));
1218
1219 if (cstate->replay_owner) {
1220 nfs4_put_stateowner(cstate->replay_owner);
1221 cstate->replay_owner = NULL;
1222 }
1223 /* XXX Ugh, we need to get rid of this kind of special case: */
1224 if (op->opnum == OP_READ && op->u.read.rd_filp)
1225 fput(op->u.read.rd_filp);
1226
1227 nfsd4_increment_op_stats(op->opnum);
1228 }
1229
1230 resp->cstate.status = status;
1231 fh_put(&resp->cstate.current_fh);
1232 fh_put(&resp->cstate.save_fh);
1233 BUG_ON(resp->cstate.replay_owner);
1234out:
1235 /* Reset deferral mechanism for RPC deferrals */
1236 rqstp->rq_usedeferral = 1;
1237 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1238 return status;
1239}
1240
1241static struct nfsd4_operation nfsd4_ops[] = {
1242 [OP_ACCESS] = {
1243 .op_func = (nfsd4op_func)nfsd4_access,
1244 .op_name = "OP_ACCESS",
1245 },
1246 [OP_CLOSE] = {
1247 .op_func = (nfsd4op_func)nfsd4_close,
1248 .op_name = "OP_CLOSE",
1249 },
1250 [OP_COMMIT] = {
1251 .op_func = (nfsd4op_func)nfsd4_commit,
1252 .op_name = "OP_COMMIT",
1253 },
1254 [OP_CREATE] = {
1255 .op_func = (nfsd4op_func)nfsd4_create,
1256 .op_name = "OP_CREATE",
1257 .op_cacheresult = true,
1258 },
1259 [OP_DELEGRETURN] = {
1260 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1261 .op_name = "OP_DELEGRETURN",
1262 },
1263 [OP_GETATTR] = {
1264 .op_func = (nfsd4op_func)nfsd4_getattr,
1265 .op_flags = ALLOWED_ON_ABSENT_FS,
1266 .op_name = "OP_GETATTR",
1267 },
1268 [OP_GETFH] = {
1269 .op_func = (nfsd4op_func)nfsd4_getfh,
1270 .op_name = "OP_GETFH",
1271 },
1272 [OP_LINK] = {
1273 .op_func = (nfsd4op_func)nfsd4_link,
1274 .op_name = "OP_LINK",
1275 .op_cacheresult = true,
1276 },
1277 [OP_LOCK] = {
1278 .op_func = (nfsd4op_func)nfsd4_lock,
1279 .op_name = "OP_LOCK",
1280 },
1281 [OP_LOCKT] = {
1282 .op_func = (nfsd4op_func)nfsd4_lockt,
1283 .op_name = "OP_LOCKT",
1284 },
1285 [OP_LOCKU] = {
1286 .op_func = (nfsd4op_func)nfsd4_locku,
1287 .op_name = "OP_LOCKU",
1288 },
1289 [OP_LOOKUP] = {
1290 .op_func = (nfsd4op_func)nfsd4_lookup,
1291 .op_flags = OP_HANDLES_WRONGSEC,
1292 .op_name = "OP_LOOKUP",
1293 },
1294 [OP_LOOKUPP] = {
1295 .op_func = (nfsd4op_func)nfsd4_lookupp,
1296 .op_flags = OP_HANDLES_WRONGSEC,
1297 .op_name = "OP_LOOKUPP",
1298 },
1299 [OP_NVERIFY] = {
1300 .op_func = (nfsd4op_func)nfsd4_nverify,
1301 .op_name = "OP_NVERIFY",
1302 },
1303 [OP_OPEN] = {
1304 .op_func = (nfsd4op_func)nfsd4_open,
1305 .op_flags = OP_HANDLES_WRONGSEC,
1306 .op_name = "OP_OPEN",
1307 },
1308 [OP_OPEN_CONFIRM] = {
1309 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1310 .op_name = "OP_OPEN_CONFIRM",
1311 },
1312 [OP_OPEN_DOWNGRADE] = {
1313 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1314 .op_name = "OP_OPEN_DOWNGRADE",
1315 },
1316 [OP_PUTFH] = {
1317 .op_func = (nfsd4op_func)nfsd4_putfh,
1318 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1319 | OP_IS_PUTFH_LIKE,
1320 .op_name = "OP_PUTFH",
1321 },
1322 [OP_PUTPUBFH] = {
1323 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1324 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1325 | OP_IS_PUTFH_LIKE,
1326 .op_name = "OP_PUTPUBFH",
1327 },
1328 [OP_PUTROOTFH] = {
1329 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1330 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1331 | OP_IS_PUTFH_LIKE,
1332 .op_name = "OP_PUTROOTFH",
1333 },
1334 [OP_READ] = {
1335 .op_func = (nfsd4op_func)nfsd4_read,
1336 .op_name = "OP_READ",
1337 },
1338 [OP_READDIR] = {
1339 .op_func = (nfsd4op_func)nfsd4_readdir,
1340 .op_name = "OP_READDIR",
1341 },
1342 [OP_READLINK] = {
1343 .op_func = (nfsd4op_func)nfsd4_readlink,
1344 .op_name = "OP_READLINK",
1345 },
1346 [OP_REMOVE] = {
1347 .op_func = (nfsd4op_func)nfsd4_remove,
1348 .op_name = "OP_REMOVE",
1349 .op_cacheresult = true,
1350 },
1351 [OP_RENAME] = {
1352 .op_name = "OP_RENAME",
1353 .op_func = (nfsd4op_func)nfsd4_rename,
1354 .op_cacheresult = true,
1355 },
1356 [OP_RENEW] = {
1357 .op_func = (nfsd4op_func)nfsd4_renew,
1358 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1359 .op_name = "OP_RENEW",
1360 },
1361 [OP_RESTOREFH] = {
1362 .op_func = (nfsd4op_func)nfsd4_restorefh,
1363 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1364 | OP_IS_PUTFH_LIKE,
1365 .op_name = "OP_RESTOREFH",
1366 },
1367 [OP_SAVEFH] = {
1368 .op_func = (nfsd4op_func)nfsd4_savefh,
1369 .op_flags = OP_HANDLES_WRONGSEC,
1370 .op_name = "OP_SAVEFH",
1371 },
1372 [OP_SECINFO] = {
1373 .op_func = (nfsd4op_func)nfsd4_secinfo,
1374 .op_flags = OP_HANDLES_WRONGSEC,
1375 .op_name = "OP_SECINFO",
1376 },
1377 [OP_SETATTR] = {
1378 .op_func = (nfsd4op_func)nfsd4_setattr,
1379 .op_name = "OP_SETATTR",
1380 .op_cacheresult = true,
1381 },
1382 [OP_SETCLIENTID] = {
1383 .op_func = (nfsd4op_func)nfsd4_setclientid,
1384 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1385 .op_name = "OP_SETCLIENTID",
1386 .op_cacheresult = true,
1387 },
1388 [OP_SETCLIENTID_CONFIRM] = {
1389 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1390 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1391 .op_name = "OP_SETCLIENTID_CONFIRM",
1392 .op_cacheresult = true,
1393 },
1394 [OP_VERIFY] = {
1395 .op_func = (nfsd4op_func)nfsd4_verify,
1396 .op_name = "OP_VERIFY",
1397 },
1398 [OP_WRITE] = {
1399 .op_func = (nfsd4op_func)nfsd4_write,
1400 .op_name = "OP_WRITE",
1401 .op_cacheresult = true,
1402 },
1403 [OP_RELEASE_LOCKOWNER] = {
1404 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1405 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1406 .op_name = "OP_RELEASE_LOCKOWNER",
1407 },
1408
1409 /* NFSv4.1 operations */
1410 [OP_EXCHANGE_ID] = {
1411 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1412 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1413 .op_name = "OP_EXCHANGE_ID",
1414 },
1415 [OP_BIND_CONN_TO_SESSION] = {
1416 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1417 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1418 .op_name = "OP_BIND_CONN_TO_SESSION",
1419 },
1420 [OP_CREATE_SESSION] = {
1421 .op_func = (nfsd4op_func)nfsd4_create_session,
1422 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1423 .op_name = "OP_CREATE_SESSION",
1424 },
1425 [OP_DESTROY_SESSION] = {
1426 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1427 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1428 .op_name = "OP_DESTROY_SESSION",
1429 },
1430 [OP_SEQUENCE] = {
1431 .op_func = (nfsd4op_func)nfsd4_sequence,
1432 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1433 .op_name = "OP_SEQUENCE",
1434 },
1435 [OP_DESTROY_CLIENTID] = {
1436 .op_func = NULL,
1437 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1438 .op_name = "OP_DESTROY_CLIENTID",
1439 },
1440 [OP_RECLAIM_COMPLETE] = {
1441 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1442 .op_flags = ALLOWED_WITHOUT_FH,
1443 .op_name = "OP_RECLAIM_COMPLETE",
1444 },
1445 [OP_SECINFO_NO_NAME] = {
1446 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1447 .op_flags = OP_HANDLES_WRONGSEC,
1448 .op_name = "OP_SECINFO_NO_NAME",
1449 },
1450 [OP_TEST_STATEID] = {
1451 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1452 .op_flags = ALLOWED_WITHOUT_FH,
1453 .op_name = "OP_TEST_STATEID",
1454 },
1455 [OP_FREE_STATEID] = {
1456 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1457 .op_flags = ALLOWED_WITHOUT_FH,
1458 .op_name = "OP_FREE_STATEID",
1459 },
1460};
1461
1462static const char *nfsd4_op_name(unsigned opnum)
1463{
1464 if (opnum < ARRAY_SIZE(nfsd4_ops))
1465 return nfsd4_ops[opnum].op_name;
1466 return "unknown_operation";
1467}
1468
1469#define nfsd4_voidres nfsd4_voidargs
1470struct nfsd4_voidargs { int dummy; };
1471
1472static struct svc_procedure nfsd_procedures4[2] = {
1473 [NFSPROC4_NULL] = {
1474 .pc_func = (svc_procfunc) nfsd4_proc_null,
1475 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1476 .pc_argsize = sizeof(struct nfsd4_voidargs),
1477 .pc_ressize = sizeof(struct nfsd4_voidres),
1478 .pc_cachetype = RC_NOCACHE,
1479 .pc_xdrressize = 1,
1480 },
1481 [NFSPROC4_COMPOUND] = {
1482 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1483 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1484 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1485 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1486 .pc_ressize = sizeof(struct nfsd4_compoundres),
1487 .pc_release = nfsd4_release_compoundargs,
1488 .pc_cachetype = RC_NOCACHE,
1489 .pc_xdrressize = NFSD_BUFSIZE/4,
1490 },
1491};
1492
1493struct svc_version nfsd_version4 = {
1494 .vs_vers = 4,
1495 .vs_nproc = 2,
1496 .vs_proc = nfsd_procedures4,
1497 .vs_dispatch = nfsd_dispatch,
1498 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1499};
1500
1501/*
1502 * Local variables:
1503 * c-basic-offset: 8
1504 * End:
1505 */
1/*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35#include <linux/file.h>
36#include <linux/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 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
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 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
100 return nfserr_attrnotsupp;
101 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
102 return nfserr_attrnotsupp;
103 if (writable && !bmval_is_subset(bmval, writable))
104 return nfserr_inval;
105 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
106 (bmval[1] & FATTR4_WORD1_MODE))
107 return nfserr_inval;
108 return nfs_ok;
109}
110
111static __be32
112nfsd4_check_open_attributes(struct svc_rqst *rqstp,
113 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
114{
115 __be32 status = nfs_ok;
116
117 if (open->op_create == NFS4_OPEN_CREATE) {
118 if (open->op_createmode == NFS4_CREATE_UNCHECKED
119 || open->op_createmode == NFS4_CREATE_GUARDED)
120 status = check_attr_support(rqstp, cstate,
121 open->op_bmval, nfsd_attrmask);
122 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
123 status = check_attr_support(rqstp, cstate,
124 open->op_bmval, nfsd41_ex_attrmask);
125 }
126
127 return status;
128}
129
130static int
131is_create_with_attrs(struct nfsd4_open *open)
132{
133 return open->op_create == NFS4_OPEN_CREATE
134 && (open->op_createmode == NFS4_CREATE_UNCHECKED
135 || open->op_createmode == NFS4_CREATE_GUARDED
136 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
137}
138
139/*
140 * if error occurs when setting the acl, just clear the acl bit
141 * in the returned attr bitmap.
142 */
143static void
144do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
145 struct nfs4_acl *acl, u32 *bmval)
146{
147 __be32 status;
148
149 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
150 if (status)
151 /*
152 * We should probably fail the whole open at this point,
153 * but we've already created the file, so it's too late;
154 * So this seems the least of evils:
155 */
156 bmval[0] &= ~FATTR4_WORD0_ACL;
157}
158
159static inline void
160fh_dup2(struct svc_fh *dst, struct svc_fh *src)
161{
162 fh_put(dst);
163 dget(src->fh_dentry);
164 if (src->fh_export)
165 exp_get(src->fh_export);
166 *dst = *src;
167}
168
169static __be32
170do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
171{
172 __be32 status;
173
174 if (open->op_truncate &&
175 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
176 return nfserr_inval;
177
178 accmode |= NFSD_MAY_READ_IF_EXEC;
179
180 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
181 accmode |= NFSD_MAY_READ;
182 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
183 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
184 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
185 accmode |= NFSD_MAY_WRITE;
186
187 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
188
189 return status;
190}
191
192static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
193{
194 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
195
196 if (S_ISREG(mode))
197 return nfs_ok;
198 if (S_ISDIR(mode))
199 return nfserr_isdir;
200 /*
201 * Using err_symlink as our catch-all case may look odd; but
202 * there's no other obvious error for this case in 4.0, and we
203 * happen to know that it will cause the linux v4 client to do
204 * the right thing on attempts to open something other than a
205 * regular file.
206 */
207 return nfserr_symlink;
208}
209
210static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
211{
212 if (nfsd4_has_session(cstate))
213 return;
214 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
215 &resfh->fh_handle);
216}
217
218static __be32
219do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
220{
221 struct svc_fh *current_fh = &cstate->current_fh;
222 int accmode;
223 __be32 status;
224
225 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
226 if (!*resfh)
227 return nfserr_jukebox;
228 fh_init(*resfh, NFS4_FHSIZE);
229 open->op_truncate = 0;
230
231 if (open->op_create) {
232 /* FIXME: check session persistence and pnfs flags.
233 * The nfsv4.1 spec requires the following semantics:
234 *
235 * Persistent | pNFS | Server REQUIRED | Client Allowed
236 * Reply Cache | server | |
237 * -------------+--------+-----------------+--------------------
238 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
239 * | | | (SHOULD)
240 * | | and EXCLUSIVE4 | or EXCLUSIVE4
241 * | | | (SHOULD NOT)
242 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
243 * yes | no | GUARDED4 | GUARDED4
244 * yes | yes | GUARDED4 | GUARDED4
245 */
246
247 /*
248 * Note: create modes (UNCHECKED,GUARDED...) are the same
249 * in NFSv4 as in v3 except EXCLUSIVE4_1.
250 */
251 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
252 open->op_fname.len, &open->op_iattr,
253 *resfh, open->op_createmode,
254 (u32 *)open->op_verf.data,
255 &open->op_truncate, &open->op_created);
256
257 if (!status && open->op_label.len)
258 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
259
260 /*
261 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
262 * use the returned bitmask to indicate which attributes
263 * we used to store the verifier:
264 */
265 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
266 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
267 FATTR4_WORD1_TIME_MODIFY);
268 } else
269 /*
270 * Note this may exit with the parent still locked.
271 * We will hold the lock until nfsd4_open's final
272 * lookup, to prevent renames or unlinks until we've had
273 * a chance to an acquire a delegation if appropriate.
274 */
275 status = nfsd_lookup(rqstp, current_fh,
276 open->op_fname.data, open->op_fname.len, *resfh);
277 if (status)
278 goto out;
279 status = nfsd_check_obj_isreg(*resfh);
280 if (status)
281 goto out;
282
283 if (is_create_with_attrs(open) && open->op_acl != NULL)
284 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
285
286 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
287 accmode = NFSD_MAY_NOP;
288 if (open->op_created ||
289 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
290 accmode |= NFSD_MAY_OWNER_OVERRIDE;
291 status = do_open_permission(rqstp, *resfh, open, accmode);
292 set_change_info(&open->op_cinfo, current_fh);
293out:
294 return status;
295}
296
297static __be32
298do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
299{
300 struct svc_fh *current_fh = &cstate->current_fh;
301 __be32 status;
302 int accmode = 0;
303
304 /* We don't know the target directory, and therefore can not
305 * set the change info
306 */
307
308 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
309
310 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
311
312 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
313 (open->op_iattr.ia_size == 0);
314 /*
315 * In the delegation case, the client is telling us about an
316 * open that it *already* performed locally, some time ago. We
317 * should let it succeed now if possible.
318 *
319 * In the case of a CLAIM_FH open, on the other hand, the client
320 * may be counting on us to enforce permissions (the Linux 4.1
321 * client uses this for normal opens, for example).
322 */
323 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
324 accmode = NFSD_MAY_OWNER_OVERRIDE;
325
326 status = do_open_permission(rqstp, current_fh, open, accmode);
327
328 return status;
329}
330
331static void
332copy_clientid(clientid_t *clid, struct nfsd4_session *session)
333{
334 struct nfsd4_sessionid *sid =
335 (struct nfsd4_sessionid *)session->se_sessionid.data;
336
337 clid->cl_boot = sid->clientid.cl_boot;
338 clid->cl_id = sid->clientid.cl_id;
339}
340
341static __be32
342nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
343 struct nfsd4_open *open)
344{
345 __be32 status;
346 struct svc_fh *resfh = NULL;
347 struct net *net = SVC_NET(rqstp);
348 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
349
350 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
351 (int)open->op_fname.len, open->op_fname.data,
352 open->op_openowner);
353
354 /* This check required by spec. */
355 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
356 return nfserr_inval;
357
358 open->op_created = 0;
359 /*
360 * RFC5661 18.51.3
361 * Before RECLAIM_COMPLETE done, server should deny new lock
362 */
363 if (nfsd4_has_session(cstate) &&
364 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
365 &cstate->session->se_client->cl_flags) &&
366 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
367 return nfserr_grace;
368
369 if (nfsd4_has_session(cstate))
370 copy_clientid(&open->op_clientid, cstate->session);
371
372 /* check seqid for replay. set nfs4_owner */
373 status = nfsd4_process_open1(cstate, open, nn);
374 if (status == nfserr_replay_me) {
375 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
376 fh_put(&cstate->current_fh);
377 fh_copy_shallow(&cstate->current_fh.fh_handle,
378 &rp->rp_openfh);
379 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
380 if (status)
381 dprintk("nfsd4_open: replay failed"
382 " restoring previous filehandle\n");
383 else
384 status = nfserr_replay_me;
385 }
386 if (status)
387 goto out;
388 if (open->op_xdr_error) {
389 status = open->op_xdr_error;
390 goto out;
391 }
392
393 status = nfsd4_check_open_attributes(rqstp, cstate, open);
394 if (status)
395 goto out;
396
397 /* Openowner is now set, so sequence id will get bumped. Now we need
398 * these checks before we do any creates: */
399 status = nfserr_grace;
400 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
401 goto out;
402 status = nfserr_no_grace;
403 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
404 goto out;
405
406 switch (open->op_claim_type) {
407 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
408 case NFS4_OPEN_CLAIM_NULL:
409 status = do_open_lookup(rqstp, cstate, open, &resfh);
410 if (status)
411 goto out;
412 break;
413 case NFS4_OPEN_CLAIM_PREVIOUS:
414 status = nfs4_check_open_reclaim(&open->op_clientid,
415 cstate, nn);
416 if (status)
417 goto out;
418 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
419 case NFS4_OPEN_CLAIM_FH:
420 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
421 status = do_open_fhandle(rqstp, cstate, open);
422 if (status)
423 goto out;
424 resfh = &cstate->current_fh;
425 break;
426 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
427 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
428 dprintk("NFSD: unsupported OPEN claim type %d\n",
429 open->op_claim_type);
430 status = nfserr_notsupp;
431 goto out;
432 default:
433 dprintk("NFSD: Invalid OPEN claim type %d\n",
434 open->op_claim_type);
435 status = nfserr_inval;
436 goto out;
437 }
438 /*
439 * nfsd4_process_open2() does the actual opening of the file. If
440 * successful, it (1) truncates the file if open->op_truncate was
441 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
442 */
443 status = nfsd4_process_open2(rqstp, resfh, open);
444 WARN(status && open->op_created,
445 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
446 be32_to_cpu(status));
447out:
448 if (resfh && resfh != &cstate->current_fh) {
449 fh_dup2(&cstate->current_fh, resfh);
450 fh_put(resfh);
451 kfree(resfh);
452 }
453 nfsd4_cleanup_open_state(cstate, open);
454 nfsd4_bump_seqid(cstate, status);
455 return status;
456}
457
458/*
459 * OPEN is the only seqid-mutating operation whose decoding can fail
460 * with a seqid-mutating error (specifically, decoding of user names in
461 * the attributes). Therefore we have to do some processing to look up
462 * the stateowner so that we can bump the seqid.
463 */
464static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
465{
466 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
467
468 if (!seqid_mutating_err(ntohl(op->status)))
469 return op->status;
470 if (nfsd4_has_session(cstate))
471 return op->status;
472 open->op_xdr_error = op->status;
473 return nfsd4_open(rqstp, cstate, open);
474}
475
476/*
477 * filehandle-manipulating ops.
478 */
479static __be32
480nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
481 struct svc_fh **getfh)
482{
483 if (!cstate->current_fh.fh_dentry)
484 return nfserr_nofilehandle;
485
486 *getfh = &cstate->current_fh;
487 return nfs_ok;
488}
489
490static __be32
491nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
492 struct nfsd4_putfh *putfh)
493{
494 fh_put(&cstate->current_fh);
495 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
496 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
497 putfh->pf_fhlen);
498 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
499}
500
501static __be32
502nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 void *arg)
504{
505 __be32 status;
506
507 fh_put(&cstate->current_fh);
508 status = exp_pseudoroot(rqstp, &cstate->current_fh);
509 return status;
510}
511
512static __be32
513nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
514 void *arg)
515{
516 if (!cstate->save_fh.fh_dentry)
517 return nfserr_restorefh;
518
519 fh_dup2(&cstate->current_fh, &cstate->save_fh);
520 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
521 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
522 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
523 }
524 return nfs_ok;
525}
526
527static __be32
528nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 void *arg)
530{
531 if (!cstate->current_fh.fh_dentry)
532 return nfserr_nofilehandle;
533
534 fh_dup2(&cstate->save_fh, &cstate->current_fh);
535 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
536 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
537 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
538 }
539 return nfs_ok;
540}
541
542/*
543 * misc nfsv4 ops
544 */
545static __be32
546nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 struct nfsd4_access *access)
548{
549 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
550 return nfserr_inval;
551
552 access->ac_resp_access = access->ac_req_access;
553 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
554 &access->ac_supported);
555}
556
557static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
558{
559 __be32 verf[2];
560 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
561
562 /*
563 * This is opaque to client, so no need to byte-swap. Use
564 * __force to keep sparse happy
565 */
566 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
567 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
568 memcpy(verifier->data, verf, sizeof(verifier->data));
569}
570
571static __be32
572nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
573 struct nfsd4_commit *commit)
574{
575 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
576 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
577 commit->co_count);
578}
579
580static __be32
581nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 struct nfsd4_create *create)
583{
584 struct svc_fh resfh;
585 __be32 status;
586 dev_t rdev;
587
588 fh_init(&resfh, NFS4_FHSIZE);
589
590 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
591 if (status)
592 return status;
593
594 status = check_attr_support(rqstp, cstate, create->cr_bmval,
595 nfsd_attrmask);
596 if (status)
597 return status;
598
599 switch (create->cr_type) {
600 case NF4LNK:
601 status = nfsd_symlink(rqstp, &cstate->current_fh,
602 create->cr_name, create->cr_namelen,
603 create->cr_data, &resfh);
604 break;
605
606 case NF4BLK:
607 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
608 if (MAJOR(rdev) != create->cr_specdata1 ||
609 MINOR(rdev) != create->cr_specdata2)
610 return nfserr_inval;
611 status = nfsd_create(rqstp, &cstate->current_fh,
612 create->cr_name, create->cr_namelen,
613 &create->cr_iattr, S_IFBLK, rdev, &resfh);
614 break;
615
616 case NF4CHR:
617 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
618 if (MAJOR(rdev) != create->cr_specdata1 ||
619 MINOR(rdev) != create->cr_specdata2)
620 return nfserr_inval;
621 status = nfsd_create(rqstp, &cstate->current_fh,
622 create->cr_name, create->cr_namelen,
623 &create->cr_iattr,S_IFCHR, rdev, &resfh);
624 break;
625
626 case NF4SOCK:
627 status = nfsd_create(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
629 &create->cr_iattr, S_IFSOCK, 0, &resfh);
630 break;
631
632 case NF4FIFO:
633 status = nfsd_create(rqstp, &cstate->current_fh,
634 create->cr_name, create->cr_namelen,
635 &create->cr_iattr, S_IFIFO, 0, &resfh);
636 break;
637
638 case NF4DIR:
639 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFDIR, 0, &resfh);
643 break;
644
645 default:
646 status = nfserr_badtype;
647 }
648
649 if (status)
650 goto out;
651
652 if (create->cr_label.len)
653 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
654
655 if (create->cr_acl != NULL)
656 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
657 create->cr_bmval);
658
659 fh_unlock(&cstate->current_fh);
660 set_change_info(&create->cr_cinfo, &cstate->current_fh);
661 fh_dup2(&cstate->current_fh, &resfh);
662out:
663 fh_put(&resfh);
664 return status;
665}
666
667static __be32
668nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
669 struct nfsd4_getattr *getattr)
670{
671 __be32 status;
672
673 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
674 if (status)
675 return status;
676
677 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
678 return nfserr_inval;
679
680 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
681 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
682 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
683
684 getattr->ga_fhp = &cstate->current_fh;
685 return nfs_ok;
686}
687
688static __be32
689nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
690 struct nfsd4_link *link)
691{
692 __be32 status = nfserr_nofilehandle;
693
694 if (!cstate->save_fh.fh_dentry)
695 return status;
696 status = nfsd_link(rqstp, &cstate->current_fh,
697 link->li_name, link->li_namelen, &cstate->save_fh);
698 if (!status)
699 set_change_info(&link->li_cinfo, &cstate->current_fh);
700 return status;
701}
702
703static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
704{
705 struct svc_fh tmp_fh;
706 __be32 ret;
707
708 fh_init(&tmp_fh, NFS4_FHSIZE);
709 ret = exp_pseudoroot(rqstp, &tmp_fh);
710 if (ret)
711 return ret;
712 if (tmp_fh.fh_dentry == fh->fh_dentry) {
713 fh_put(&tmp_fh);
714 return nfserr_noent;
715 }
716 fh_put(&tmp_fh);
717 return nfsd_lookup(rqstp, fh, "..", 2, fh);
718}
719
720static __be32
721nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
722 void *arg)
723{
724 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
725}
726
727static __be32
728nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
729 struct nfsd4_lookup *lookup)
730{
731 return nfsd_lookup(rqstp, &cstate->current_fh,
732 lookup->lo_name, lookup->lo_len,
733 &cstate->current_fh);
734}
735
736static __be32
737nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
738 struct nfsd4_read *read)
739{
740 __be32 status;
741
742 read->rd_filp = NULL;
743 if (read->rd_offset >= OFFSET_MAX)
744 return nfserr_inval;
745
746 /*
747 * If we do a zero copy read, then a client will see read data
748 * that reflects the state of the file *after* performing the
749 * following compound.
750 *
751 * To ensure proper ordering, we therefore turn off zero copy if
752 * the client wants us to do more in this compound:
753 */
754 if (!nfsd4_last_compound_op(rqstp))
755 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
756
757 /* check stateid */
758 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
759 &read->rd_stateid, RD_STATE,
760 &read->rd_filp, &read->rd_tmp_file);
761 if (status) {
762 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
763 goto out;
764 }
765 status = nfs_ok;
766out:
767 read->rd_rqstp = rqstp;
768 read->rd_fhp = &cstate->current_fh;
769 return status;
770}
771
772static __be32
773nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
774 struct nfsd4_readdir *readdir)
775{
776 u64 cookie = readdir->rd_cookie;
777 static const nfs4_verifier zeroverf;
778
779 /* no need to check permission - this will be done in nfsd_readdir() */
780
781 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
782 return nfserr_inval;
783
784 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
785 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
786 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
787
788 if ((cookie == 1) || (cookie == 2) ||
789 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
790 return nfserr_bad_cookie;
791
792 readdir->rd_rqstp = rqstp;
793 readdir->rd_fhp = &cstate->current_fh;
794 return nfs_ok;
795}
796
797static __be32
798nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
799 struct nfsd4_readlink *readlink)
800{
801 readlink->rl_rqstp = rqstp;
802 readlink->rl_fhp = &cstate->current_fh;
803 return nfs_ok;
804}
805
806static __be32
807nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
808 struct nfsd4_remove *remove)
809{
810 __be32 status;
811
812 if (opens_in_grace(SVC_NET(rqstp)))
813 return nfserr_grace;
814 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
815 remove->rm_name, remove->rm_namelen);
816 if (!status) {
817 fh_unlock(&cstate->current_fh);
818 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
819 }
820 return status;
821}
822
823static __be32
824nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
825 struct nfsd4_rename *rename)
826{
827 __be32 status = nfserr_nofilehandle;
828
829 if (!cstate->save_fh.fh_dentry)
830 return status;
831 if (opens_in_grace(SVC_NET(rqstp)) &&
832 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
833 return nfserr_grace;
834 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
835 rename->rn_snamelen, &cstate->current_fh,
836 rename->rn_tname, rename->rn_tnamelen);
837 if (status)
838 return status;
839 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
840 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
841 return nfs_ok;
842}
843
844static __be32
845nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
846 struct nfsd4_secinfo *secinfo)
847{
848 struct svc_export *exp;
849 struct dentry *dentry;
850 __be32 err;
851
852 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
853 if (err)
854 return err;
855 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
856 secinfo->si_name, secinfo->si_namelen,
857 &exp, &dentry);
858 if (err)
859 return err;
860 fh_unlock(&cstate->current_fh);
861 if (d_really_is_negative(dentry)) {
862 exp_put(exp);
863 err = nfserr_noent;
864 } else
865 secinfo->si_exp = exp;
866 dput(dentry);
867 if (cstate->minorversion)
868 /* See rfc 5661 section 2.6.3.1.1.8 */
869 fh_put(&cstate->current_fh);
870 return err;
871}
872
873static __be32
874nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
875 struct nfsd4_secinfo_no_name *sin)
876{
877 __be32 err;
878
879 switch (sin->sin_style) {
880 case NFS4_SECINFO_STYLE4_CURRENT_FH:
881 break;
882 case NFS4_SECINFO_STYLE4_PARENT:
883 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
884 if (err)
885 return err;
886 break;
887 default:
888 return nfserr_inval;
889 }
890
891 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
892 fh_put(&cstate->current_fh);
893 return nfs_ok;
894}
895
896static __be32
897nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
898 struct nfsd4_setattr *setattr)
899{
900 __be32 status = nfs_ok;
901 int err;
902
903 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
904 status = nfs4_preprocess_stateid_op(rqstp, cstate,
905 &cstate->current_fh, &setattr->sa_stateid,
906 WR_STATE, NULL, NULL);
907 if (status) {
908 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
909 return status;
910 }
911 }
912 err = fh_want_write(&cstate->current_fh);
913 if (err)
914 return nfserrno(err);
915 status = nfs_ok;
916
917 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
918 nfsd_attrmask);
919 if (status)
920 goto out;
921
922 if (setattr->sa_acl != NULL)
923 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
924 setattr->sa_acl);
925 if (status)
926 goto out;
927 if (setattr->sa_label.len)
928 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
929 &setattr->sa_label);
930 if (status)
931 goto out;
932 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
933 0, (time_t)0);
934out:
935 fh_drop_write(&cstate->current_fh);
936 return status;
937}
938
939static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
940{
941 int i = 1;
942 int buflen = write->wr_buflen;
943
944 vec[0].iov_base = write->wr_head.iov_base;
945 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
946 buflen -= vec[0].iov_len;
947
948 while (buflen) {
949 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
950 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
951 buflen -= vec[i].iov_len;
952 i++;
953 }
954 return i;
955}
956
957static __be32
958nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
959 struct nfsd4_write *write)
960{
961 stateid_t *stateid = &write->wr_stateid;
962 struct file *filp = NULL;
963 __be32 status = nfs_ok;
964 unsigned long cnt;
965 int nvecs;
966
967 if (write->wr_offset >= OFFSET_MAX)
968 return nfserr_inval;
969
970 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
971 stateid, WR_STATE, &filp, NULL);
972 if (status) {
973 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
974 return status;
975 }
976
977 cnt = write->wr_buflen;
978 write->wr_how_written = write->wr_stable_how;
979 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
980
981 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
982 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
983
984 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
985 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
986 &write->wr_how_written);
987 fput(filp);
988
989 write->wr_bytes_written = cnt;
990
991 return status;
992}
993
994static __be32
995nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
996 stateid_t *src_stateid, struct file **src,
997 stateid_t *dst_stateid, struct file **dst)
998{
999 __be32 status;
1000
1001 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1002 src_stateid, RD_STATE, src, NULL);
1003 if (status) {
1004 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1005 goto out;
1006 }
1007
1008 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1009 dst_stateid, WR_STATE, dst, NULL);
1010 if (status) {
1011 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1012 goto out_put_src;
1013 }
1014
1015 /* fix up for NFS-specific error code */
1016 if (!S_ISREG(file_inode(*src)->i_mode) ||
1017 !S_ISREG(file_inode(*dst)->i_mode)) {
1018 status = nfserr_wrong_type;
1019 goto out_put_dst;
1020 }
1021
1022out:
1023 return status;
1024out_put_dst:
1025 fput(*dst);
1026out_put_src:
1027 fput(*src);
1028 goto out;
1029}
1030
1031static __be32
1032nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1033 struct nfsd4_clone *clone)
1034{
1035 struct file *src, *dst;
1036 __be32 status;
1037
1038 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1039 &clone->cl_dst_stateid, &dst);
1040 if (status)
1041 goto out;
1042
1043 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1044 dst, clone->cl_dst_pos, clone->cl_count);
1045
1046 fput(dst);
1047 fput(src);
1048out:
1049 return status;
1050}
1051
1052static __be32
1053nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1054 struct nfsd4_copy *copy)
1055{
1056 struct file *src, *dst;
1057 __be32 status;
1058 ssize_t bytes;
1059
1060 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1061 ©->cp_dst_stateid, &dst);
1062 if (status)
1063 goto out;
1064
1065 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1066 dst, copy->cp_dst_pos, copy->cp_count);
1067
1068 if (bytes < 0)
1069 status = nfserrno(bytes);
1070 else {
1071 copy->cp_res.wr_bytes_written = bytes;
1072 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1073 copy->cp_consecutive = 1;
1074 copy->cp_synchronous = 1;
1075 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1076 status = nfs_ok;
1077 }
1078
1079 fput(src);
1080 fput(dst);
1081out:
1082 return status;
1083}
1084
1085static __be32
1086nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1087 struct nfsd4_fallocate *fallocate, int flags)
1088{
1089 __be32 status = nfserr_notsupp;
1090 struct file *file;
1091
1092 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1093 &fallocate->falloc_stateid,
1094 WR_STATE, &file, NULL);
1095 if (status != nfs_ok) {
1096 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1097 return status;
1098 }
1099
1100 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1101 fallocate->falloc_offset,
1102 fallocate->falloc_length,
1103 flags);
1104 fput(file);
1105 return status;
1106}
1107
1108static __be32
1109nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1110 struct nfsd4_fallocate *fallocate)
1111{
1112 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1113}
1114
1115static __be32
1116nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1117 struct nfsd4_fallocate *fallocate)
1118{
1119 return nfsd4_fallocate(rqstp, cstate, fallocate,
1120 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1121}
1122
1123static __be32
1124nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1125 struct nfsd4_seek *seek)
1126{
1127 int whence;
1128 __be32 status;
1129 struct file *file;
1130
1131 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1132 &seek->seek_stateid,
1133 RD_STATE, &file, NULL);
1134 if (status) {
1135 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1136 return status;
1137 }
1138
1139 switch (seek->seek_whence) {
1140 case NFS4_CONTENT_DATA:
1141 whence = SEEK_DATA;
1142 break;
1143 case NFS4_CONTENT_HOLE:
1144 whence = SEEK_HOLE;
1145 break;
1146 default:
1147 status = nfserr_union_notsupp;
1148 goto out;
1149 }
1150
1151 /*
1152 * Note: This call does change file->f_pos, but nothing in NFSD
1153 * should ever file->f_pos.
1154 */
1155 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1156 if (seek->seek_pos < 0)
1157 status = nfserrno(seek->seek_pos);
1158 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1159 seek->seek_eof = true;
1160
1161out:
1162 fput(file);
1163 return status;
1164}
1165
1166/* This routine never returns NFS_OK! If there are no other errors, it
1167 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1168 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1169 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1170 */
1171static __be32
1172_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1173 struct nfsd4_verify *verify)
1174{
1175 __be32 *buf, *p;
1176 int count;
1177 __be32 status;
1178
1179 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1180 if (status)
1181 return status;
1182
1183 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1184 if (status)
1185 return status;
1186
1187 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1188 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1189 return nfserr_inval;
1190 if (verify->ve_attrlen & 3)
1191 return nfserr_inval;
1192
1193 /* count in words:
1194 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1195 */
1196 count = 4 + (verify->ve_attrlen >> 2);
1197 buf = kmalloc(count << 2, GFP_KERNEL);
1198 if (!buf)
1199 return nfserr_jukebox;
1200
1201 p = buf;
1202 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1203 cstate->current_fh.fh_export,
1204 cstate->current_fh.fh_dentry,
1205 verify->ve_bmval,
1206 rqstp, 0);
1207 /*
1208 * If nfsd4_encode_fattr() ran out of space, assume that's because
1209 * the attributes are longer (hence different) than those given:
1210 */
1211 if (status == nfserr_resource)
1212 status = nfserr_not_same;
1213 if (status)
1214 goto out_kfree;
1215
1216 /* skip bitmap */
1217 p = buf + 1 + ntohl(buf[0]);
1218 status = nfserr_not_same;
1219 if (ntohl(*p++) != verify->ve_attrlen)
1220 goto out_kfree;
1221 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1222 status = nfserr_same;
1223
1224out_kfree:
1225 kfree(buf);
1226 return status;
1227}
1228
1229static __be32
1230nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1231 struct nfsd4_verify *verify)
1232{
1233 __be32 status;
1234
1235 status = _nfsd4_verify(rqstp, cstate, verify);
1236 return status == nfserr_not_same ? nfs_ok : status;
1237}
1238
1239static __be32
1240nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1241 struct nfsd4_verify *verify)
1242{
1243 __be32 status;
1244
1245 status = _nfsd4_verify(rqstp, cstate, verify);
1246 return status == nfserr_same ? nfs_ok : status;
1247}
1248
1249#ifdef CONFIG_NFSD_PNFS
1250static const struct nfsd4_layout_ops *
1251nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1252{
1253 if (!exp->ex_layout_types) {
1254 dprintk("%s: export does not support pNFS\n", __func__);
1255 return NULL;
1256 }
1257
1258 if (!(exp->ex_layout_types & (1 << layout_type))) {
1259 dprintk("%s: layout type %d not supported\n",
1260 __func__, layout_type);
1261 return NULL;
1262 }
1263
1264 return nfsd4_layout_ops[layout_type];
1265}
1266
1267static __be32
1268nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1269 struct nfsd4_compound_state *cstate,
1270 struct nfsd4_getdeviceinfo *gdp)
1271{
1272 const struct nfsd4_layout_ops *ops;
1273 struct nfsd4_deviceid_map *map;
1274 struct svc_export *exp;
1275 __be32 nfserr;
1276
1277 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1278 __func__,
1279 gdp->gd_layout_type,
1280 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1281 gdp->gd_maxcount);
1282
1283 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1284 if (!map) {
1285 dprintk("%s: couldn't find device ID to export mapping!\n",
1286 __func__);
1287 return nfserr_noent;
1288 }
1289
1290 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1291 if (IS_ERR(exp)) {
1292 dprintk("%s: could not find device id\n", __func__);
1293 return nfserr_noent;
1294 }
1295
1296 nfserr = nfserr_layoutunavailable;
1297 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1298 if (!ops)
1299 goto out;
1300
1301 nfserr = nfs_ok;
1302 if (gdp->gd_maxcount != 0) {
1303 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1304 rqstp, cstate->session->se_client, gdp);
1305 }
1306
1307 gdp->gd_notify_types &= ops->notify_types;
1308out:
1309 exp_put(exp);
1310 return nfserr;
1311}
1312
1313static __be32
1314nfsd4_layoutget(struct svc_rqst *rqstp,
1315 struct nfsd4_compound_state *cstate,
1316 struct nfsd4_layoutget *lgp)
1317{
1318 struct svc_fh *current_fh = &cstate->current_fh;
1319 const struct nfsd4_layout_ops *ops;
1320 struct nfs4_layout_stateid *ls;
1321 __be32 nfserr;
1322 int accmode;
1323
1324 switch (lgp->lg_seg.iomode) {
1325 case IOMODE_READ:
1326 accmode = NFSD_MAY_READ;
1327 break;
1328 case IOMODE_RW:
1329 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1330 break;
1331 default:
1332 dprintk("%s: invalid iomode %d\n",
1333 __func__, lgp->lg_seg.iomode);
1334 nfserr = nfserr_badiomode;
1335 goto out;
1336 }
1337
1338 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1339 if (nfserr)
1340 goto out;
1341
1342 nfserr = nfserr_layoutunavailable;
1343 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1344 if (!ops)
1345 goto out;
1346
1347 /*
1348 * Verify minlength and range as per RFC5661:
1349 * o If loga_length is less than loga_minlength,
1350 * the metadata server MUST return NFS4ERR_INVAL.
1351 * o If the sum of loga_offset and loga_minlength exceeds
1352 * NFS4_UINT64_MAX, and loga_minlength is not
1353 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1354 * o If the sum of loga_offset and loga_length exceeds
1355 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1356 * the error NFS4ERR_INVAL MUST result.
1357 */
1358 nfserr = nfserr_inval;
1359 if (lgp->lg_seg.length < lgp->lg_minlength ||
1360 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1361 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1362 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1363 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1364 goto out;
1365 if (lgp->lg_seg.length == 0)
1366 goto out;
1367
1368 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1369 true, lgp->lg_layout_type, &ls);
1370 if (nfserr) {
1371 trace_layout_get_lookup_fail(&lgp->lg_sid);
1372 goto out;
1373 }
1374
1375 nfserr = nfserr_recallconflict;
1376 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1377 goto out_put_stid;
1378
1379 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1380 current_fh, lgp);
1381 if (nfserr)
1382 goto out_put_stid;
1383
1384 nfserr = nfsd4_insert_layout(lgp, ls);
1385
1386out_put_stid:
1387 mutex_unlock(&ls->ls_mutex);
1388 nfs4_put_stid(&ls->ls_stid);
1389out:
1390 return nfserr;
1391}
1392
1393static __be32
1394nfsd4_layoutcommit(struct svc_rqst *rqstp,
1395 struct nfsd4_compound_state *cstate,
1396 struct nfsd4_layoutcommit *lcp)
1397{
1398 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1399 struct svc_fh *current_fh = &cstate->current_fh;
1400 const struct nfsd4_layout_ops *ops;
1401 loff_t new_size = lcp->lc_last_wr + 1;
1402 struct inode *inode;
1403 struct nfs4_layout_stateid *ls;
1404 __be32 nfserr;
1405
1406 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1407 if (nfserr)
1408 goto out;
1409
1410 nfserr = nfserr_layoutunavailable;
1411 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1412 if (!ops)
1413 goto out;
1414 inode = d_inode(current_fh->fh_dentry);
1415
1416 nfserr = nfserr_inval;
1417 if (new_size <= seg->offset) {
1418 dprintk("pnfsd: last write before layout segment\n");
1419 goto out;
1420 }
1421 if (new_size > seg->offset + seg->length) {
1422 dprintk("pnfsd: last write beyond layout segment\n");
1423 goto out;
1424 }
1425 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1426 dprintk("pnfsd: layoutcommit beyond EOF\n");
1427 goto out;
1428 }
1429
1430 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1431 false, lcp->lc_layout_type,
1432 &ls);
1433 if (nfserr) {
1434 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1435 /* fixup error code as per RFC5661 */
1436 if (nfserr == nfserr_bad_stateid)
1437 nfserr = nfserr_badlayout;
1438 goto out;
1439 }
1440
1441 /* LAYOUTCOMMIT does not require any serialization */
1442 mutex_unlock(&ls->ls_mutex);
1443
1444 if (new_size > i_size_read(inode)) {
1445 lcp->lc_size_chg = 1;
1446 lcp->lc_newsize = new_size;
1447 } else {
1448 lcp->lc_size_chg = 0;
1449 }
1450
1451 nfserr = ops->proc_layoutcommit(inode, lcp);
1452 nfs4_put_stid(&ls->ls_stid);
1453out:
1454 return nfserr;
1455}
1456
1457static __be32
1458nfsd4_layoutreturn(struct svc_rqst *rqstp,
1459 struct nfsd4_compound_state *cstate,
1460 struct nfsd4_layoutreturn *lrp)
1461{
1462 struct svc_fh *current_fh = &cstate->current_fh;
1463 __be32 nfserr;
1464
1465 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1466 if (nfserr)
1467 goto out;
1468
1469 nfserr = nfserr_layoutunavailable;
1470 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1471 goto out;
1472
1473 switch (lrp->lr_seg.iomode) {
1474 case IOMODE_READ:
1475 case IOMODE_RW:
1476 case IOMODE_ANY:
1477 break;
1478 default:
1479 dprintk("%s: invalid iomode %d\n", __func__,
1480 lrp->lr_seg.iomode);
1481 nfserr = nfserr_inval;
1482 goto out;
1483 }
1484
1485 switch (lrp->lr_return_type) {
1486 case RETURN_FILE:
1487 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1488 break;
1489 case RETURN_FSID:
1490 case RETURN_ALL:
1491 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1492 break;
1493 default:
1494 dprintk("%s: invalid return_type %d\n", __func__,
1495 lrp->lr_return_type);
1496 nfserr = nfserr_inval;
1497 break;
1498 }
1499out:
1500 return nfserr;
1501}
1502#endif /* CONFIG_NFSD_PNFS */
1503
1504/*
1505 * NULL call.
1506 */
1507static __be32
1508nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1509{
1510 return nfs_ok;
1511}
1512
1513static inline void nfsd4_increment_op_stats(u32 opnum)
1514{
1515 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1516 nfsdstats.nfs4_opcount[opnum]++;
1517}
1518
1519typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1520 void *);
1521typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1522typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1523typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1524
1525enum nfsd4_op_flags {
1526 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1527 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1528 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1529 /* For rfc 5661 section 2.6.3.1.1: */
1530 OP_HANDLES_WRONGSEC = 1 << 3,
1531 OP_IS_PUTFH_LIKE = 1 << 4,
1532 /*
1533 * These are the ops whose result size we estimate before
1534 * encoding, to avoid performing an op then not being able to
1535 * respond or cache a response. This includes writes and setattrs
1536 * as well as the operations usually called "nonidempotent":
1537 */
1538 OP_MODIFIES_SOMETHING = 1 << 5,
1539 /*
1540 * Cache compounds containing these ops in the xid-based drc:
1541 * We use the DRC for compounds containing non-idempotent
1542 * operations, *except* those that are 4.1-specific (since
1543 * sessions provide their own EOS), and except for stateful
1544 * operations other than setclientid and setclientid_confirm
1545 * (since sequence numbers provide EOS for open, lock, etc in
1546 * the v4.0 case).
1547 */
1548 OP_CACHEME = 1 << 6,
1549 /*
1550 * These are ops which clear current state id.
1551 */
1552 OP_CLEAR_STATEID = 1 << 7,
1553};
1554
1555struct nfsd4_operation {
1556 nfsd4op_func op_func;
1557 u32 op_flags;
1558 char *op_name;
1559 /* Try to get response size before operation */
1560 nfsd4op_rsize op_rsize_bop;
1561 stateid_getter op_get_currentstateid;
1562 stateid_setter op_set_currentstateid;
1563};
1564
1565static struct nfsd4_operation nfsd4_ops[];
1566
1567static const char *nfsd4_op_name(unsigned opnum);
1568
1569/*
1570 * Enforce NFSv4.1 COMPOUND ordering rules:
1571 *
1572 * Also note, enforced elsewhere:
1573 * - SEQUENCE other than as first op results in
1574 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1575 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1576 * (Enforced in nfsd4_bind_conn_to_session().)
1577 * - DESTROY_SESSION must be the final operation in a compound, if
1578 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1579 * (Enforced in nfsd4_destroy_session().)
1580 */
1581static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1582{
1583 struct nfsd4_op *op = &args->ops[0];
1584
1585 /* These ordering requirements don't apply to NFSv4.0: */
1586 if (args->minorversion == 0)
1587 return nfs_ok;
1588 /* This is weird, but OK, not our problem: */
1589 if (args->opcnt == 0)
1590 return nfs_ok;
1591 if (op->status == nfserr_op_illegal)
1592 return nfs_ok;
1593 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1594 return nfserr_op_not_in_session;
1595 if (op->opnum == OP_SEQUENCE)
1596 return nfs_ok;
1597 if (args->opcnt != 1)
1598 return nfserr_not_only_op;
1599 return nfs_ok;
1600}
1601
1602static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1603{
1604 return &nfsd4_ops[op->opnum];
1605}
1606
1607bool nfsd4_cache_this_op(struct nfsd4_op *op)
1608{
1609 if (op->opnum == OP_ILLEGAL)
1610 return false;
1611 return OPDESC(op)->op_flags & OP_CACHEME;
1612}
1613
1614static bool need_wrongsec_check(struct svc_rqst *rqstp)
1615{
1616 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1617 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1618 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1619 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1620 struct nfsd4_operation *thisd;
1621 struct nfsd4_operation *nextd;
1622
1623 thisd = OPDESC(this);
1624 /*
1625 * Most ops check wronsec on our own; only the putfh-like ops
1626 * have special rules.
1627 */
1628 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1629 return false;
1630 /*
1631 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1632 * put-filehandle operation if we're not going to use the
1633 * result:
1634 */
1635 if (argp->opcnt == resp->opcnt)
1636 return false;
1637 if (next->opnum == OP_ILLEGAL)
1638 return false;
1639 nextd = OPDESC(next);
1640 /*
1641 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1642 * errors themselves as necessary; others should check for them
1643 * now:
1644 */
1645 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1646}
1647
1648static void svcxdr_init_encode(struct svc_rqst *rqstp,
1649 struct nfsd4_compoundres *resp)
1650{
1651 struct xdr_stream *xdr = &resp->xdr;
1652 struct xdr_buf *buf = &rqstp->rq_res;
1653 struct kvec *head = buf->head;
1654
1655 xdr->buf = buf;
1656 xdr->iov = head;
1657 xdr->p = head->iov_base + head->iov_len;
1658 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1659 /* Tail and page_len should be zero at this point: */
1660 buf->len = buf->head[0].iov_len;
1661 xdr->scratch.iov_len = 0;
1662 xdr->page_ptr = buf->pages - 1;
1663 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1664 - rqstp->rq_auth_slack;
1665}
1666
1667/*
1668 * COMPOUND call.
1669 */
1670static __be32
1671nfsd4_proc_compound(struct svc_rqst *rqstp,
1672 struct nfsd4_compoundargs *args,
1673 struct nfsd4_compoundres *resp)
1674{
1675 struct nfsd4_op *op;
1676 struct nfsd4_operation *opdesc;
1677 struct nfsd4_compound_state *cstate = &resp->cstate;
1678 struct svc_fh *current_fh = &cstate->current_fh;
1679 struct svc_fh *save_fh = &cstate->save_fh;
1680 __be32 status;
1681
1682 svcxdr_init_encode(rqstp, resp);
1683 resp->tagp = resp->xdr.p;
1684 /* reserve space for: taglen, tag, and opcnt */
1685 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1686 resp->taglen = args->taglen;
1687 resp->tag = args->tag;
1688 resp->rqstp = rqstp;
1689 cstate->minorversion = args->minorversion;
1690 fh_init(current_fh, NFS4_FHSIZE);
1691 fh_init(save_fh, NFS4_FHSIZE);
1692 /*
1693 * Don't use the deferral mechanism for NFSv4; compounds make it
1694 * too hard to avoid non-idempotency problems.
1695 */
1696 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1697
1698 /*
1699 * According to RFC3010, this takes precedence over all other errors.
1700 */
1701 status = nfserr_minor_vers_mismatch;
1702 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1703 goto out;
1704
1705 status = nfs41_check_op_ordering(args);
1706 if (status) {
1707 op = &args->ops[0];
1708 op->status = status;
1709 goto encode_op;
1710 }
1711
1712 while (!status && resp->opcnt < args->opcnt) {
1713 op = &args->ops[resp->opcnt++];
1714
1715 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1716 resp->opcnt, args->opcnt, op->opnum,
1717 nfsd4_op_name(op->opnum));
1718 /*
1719 * The XDR decode routines may have pre-set op->status;
1720 * for example, if there is a miscellaneous XDR error
1721 * it will be set to nfserr_bad_xdr.
1722 */
1723 if (op->status) {
1724 if (op->opnum == OP_OPEN)
1725 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1726 goto encode_op;
1727 }
1728
1729 opdesc = OPDESC(op);
1730
1731 if (!current_fh->fh_dentry) {
1732 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1733 op->status = nfserr_nofilehandle;
1734 goto encode_op;
1735 }
1736 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1737 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1738 op->status = nfserr_moved;
1739 goto encode_op;
1740 }
1741
1742 fh_clear_wcc(current_fh);
1743
1744 /* If op is non-idempotent */
1745 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1746 /*
1747 * Don't execute this op if we couldn't encode a
1748 * succesful reply:
1749 */
1750 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1751 /*
1752 * Plus if there's another operation, make sure
1753 * we'll have space to at least encode an error:
1754 */
1755 if (resp->opcnt < args->opcnt)
1756 plen += COMPOUND_ERR_SLACK_SPACE;
1757 op->status = nfsd4_check_resp_size(resp, plen);
1758 }
1759
1760 if (op->status)
1761 goto encode_op;
1762
1763 if (opdesc->op_get_currentstateid)
1764 opdesc->op_get_currentstateid(cstate, &op->u);
1765 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1766
1767 if (!op->status) {
1768 if (opdesc->op_set_currentstateid)
1769 opdesc->op_set_currentstateid(cstate, &op->u);
1770
1771 if (opdesc->op_flags & OP_CLEAR_STATEID)
1772 clear_current_stateid(cstate);
1773
1774 if (need_wrongsec_check(rqstp))
1775 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1776 }
1777
1778encode_op:
1779 /* Only from SEQUENCE */
1780 if (cstate->status == nfserr_replay_cache) {
1781 dprintk("%s NFS4.1 replay from cache\n", __func__);
1782 status = op->status;
1783 goto out;
1784 }
1785 if (op->status == nfserr_replay_me) {
1786 op->replay = &cstate->replay_owner->so_replay;
1787 nfsd4_encode_replay(&resp->xdr, op);
1788 status = op->status = op->replay->rp_status;
1789 } else {
1790 nfsd4_encode_operation(resp, op);
1791 status = op->status;
1792 }
1793
1794 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1795 args->ops, args->opcnt, resp->opcnt, op->opnum,
1796 be32_to_cpu(status));
1797
1798 nfsd4_cstate_clear_replay(cstate);
1799 nfsd4_increment_op_stats(op->opnum);
1800 }
1801
1802 cstate->status = status;
1803 fh_put(current_fh);
1804 fh_put(save_fh);
1805 BUG_ON(cstate->replay_owner);
1806out:
1807 /* Reset deferral mechanism for RPC deferrals */
1808 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1809 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1810 return status;
1811}
1812
1813#define op_encode_hdr_size (2)
1814#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1815#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1816#define op_encode_change_info_maxsz (5)
1817#define nfs4_fattr_bitmap_maxsz (4)
1818
1819/* We'll fall back on returning no lockowner if run out of space: */
1820#define op_encode_lockowner_maxsz (0)
1821#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1822
1823#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1824
1825#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1826#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1827 op_encode_ace_maxsz)
1828
1829#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1830
1831static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1832{
1833 return (op_encode_hdr_size) * sizeof(__be32);
1834}
1835
1836static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1837{
1838 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1839}
1840
1841static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1842{
1843 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1844}
1845
1846static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1847{
1848 return (op_encode_hdr_size + op_encode_change_info_maxsz
1849 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1850}
1851
1852/*
1853 * Note since this is an idempotent operation we won't insist on failing
1854 * the op prematurely if the estimate is too large. We may turn off splice
1855 * reads unnecessarily.
1856 */
1857static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1858 struct nfsd4_op *op)
1859{
1860 u32 *bmap = op->u.getattr.ga_bmval;
1861 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1862 u32 ret = 0;
1863
1864 if (bmap0 & FATTR4_WORD0_ACL)
1865 return svc_max_payload(rqstp);
1866 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1867 return svc_max_payload(rqstp);
1868
1869 if (bmap1 & FATTR4_WORD1_OWNER) {
1870 ret += IDMAP_NAMESZ + 4;
1871 bmap1 &= ~FATTR4_WORD1_OWNER;
1872 }
1873 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1874 ret += IDMAP_NAMESZ + 4;
1875 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1876 }
1877 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1878 ret += NFS4_FHSIZE + 4;
1879 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1880 }
1881 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1882 ret += NFS4_MAXLABELLEN + 12;
1883 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1884 }
1885 /*
1886 * Largest of remaining attributes are 16 bytes (e.g.,
1887 * supported_attributes)
1888 */
1889 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1890 /* bitmask, length */
1891 ret += 20;
1892 return ret;
1893}
1894
1895static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1896{
1897 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1898 * sizeof(__be32);
1899}
1900
1901static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1902{
1903 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1904 * sizeof(__be32);
1905}
1906
1907static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1908{
1909 return (op_encode_hdr_size + op_encode_stateid_maxsz
1910 + op_encode_change_info_maxsz + 1
1911 + nfs4_fattr_bitmap_maxsz
1912 + op_encode_delegation_maxsz) * sizeof(__be32);
1913}
1914
1915static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1916{
1917 u32 maxcount = 0, rlen = 0;
1918
1919 maxcount = svc_max_payload(rqstp);
1920 rlen = min(op->u.read.rd_length, maxcount);
1921
1922 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1923}
1924
1925static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1926{
1927 u32 maxcount = 0, rlen = 0;
1928
1929 maxcount = svc_max_payload(rqstp);
1930 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1931
1932 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1933 XDR_QUADLEN(rlen)) * sizeof(__be32);
1934}
1935
1936static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1937{
1938 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1939 * sizeof(__be32);
1940}
1941
1942static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1943{
1944 return (op_encode_hdr_size + op_encode_change_info_maxsz
1945 + op_encode_change_info_maxsz) * sizeof(__be32);
1946}
1947
1948static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1949 struct nfsd4_op *op)
1950{
1951 return (op_encode_hdr_size
1952 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1953}
1954
1955static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1956{
1957 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1958}
1959
1960static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961{
1962 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1963 sizeof(__be32);
1964}
1965
1966static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1967{
1968 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
1969}
1970
1971static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1972{
1973 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1974 1 + 1 + /* eir_flags, spr_how */\
1975 4 + /* spo_must_enforce & _allow with bitmap */\
1976 2 + /*eir_server_owner.so_minor_id */\
1977 /* eir_server_owner.so_major_id<> */\
1978 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1979 /* eir_server_scope<> */\
1980 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1981 1 + /* eir_server_impl_id array length */\
1982 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1983}
1984
1985static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1986{
1987 return (op_encode_hdr_size + \
1988 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1989 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1990}
1991
1992static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1993{
1994 return (op_encode_hdr_size + \
1995 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1996 2 + /* csr_sequence, csr_flags */\
1997 op_encode_channel_attrs_maxsz + \
1998 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1999}
2000
2001static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2002{
2003 return (op_encode_hdr_size +
2004 1 /* wr_callback */ +
2005 op_encode_stateid_maxsz /* wr_callback */ +
2006 2 /* wr_count */ +
2007 1 /* wr_committed */ +
2008 op_encode_verifier_maxsz +
2009 1 /* cr_consecutive */ +
2010 1 /* cr_synchronous */) * sizeof(__be32);
2011}
2012
2013#ifdef CONFIG_NFSD_PNFS
2014/*
2015 * At this stage we don't really know what layout driver will handle the request,
2016 * so we need to define an arbitrary upper bound here.
2017 */
2018#define MAX_LAYOUT_SIZE 128
2019static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size +
2022 1 /* logr_return_on_close */ +
2023 op_encode_stateid_maxsz +
2024 1 /* nr of layouts */ +
2025 MAX_LAYOUT_SIZE) * sizeof(__be32);
2026}
2027
2028static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2029{
2030 return (op_encode_hdr_size +
2031 1 /* locr_newsize */ +
2032 2 /* ns_size */) * sizeof(__be32);
2033}
2034
2035static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2036{
2037 return (op_encode_hdr_size +
2038 1 /* lrs_stateid */ +
2039 op_encode_stateid_maxsz) * sizeof(__be32);
2040}
2041#endif /* CONFIG_NFSD_PNFS */
2042
2043static struct nfsd4_operation nfsd4_ops[] = {
2044 [OP_ACCESS] = {
2045 .op_func = (nfsd4op_func)nfsd4_access,
2046 .op_name = "OP_ACCESS",
2047 },
2048 [OP_CLOSE] = {
2049 .op_func = (nfsd4op_func)nfsd4_close,
2050 .op_flags = OP_MODIFIES_SOMETHING,
2051 .op_name = "OP_CLOSE",
2052 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2053 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2054 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
2055 },
2056 [OP_COMMIT] = {
2057 .op_func = (nfsd4op_func)nfsd4_commit,
2058 .op_flags = OP_MODIFIES_SOMETHING,
2059 .op_name = "OP_COMMIT",
2060 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
2061 },
2062 [OP_CREATE] = {
2063 .op_func = (nfsd4op_func)nfsd4_create,
2064 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2065 .op_name = "OP_CREATE",
2066 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
2067 },
2068 [OP_DELEGRETURN] = {
2069 .op_func = (nfsd4op_func)nfsd4_delegreturn,
2070 .op_flags = OP_MODIFIES_SOMETHING,
2071 .op_name = "OP_DELEGRETURN",
2072 .op_rsize_bop = nfsd4_only_status_rsize,
2073 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
2074 },
2075 [OP_GETATTR] = {
2076 .op_func = (nfsd4op_func)nfsd4_getattr,
2077 .op_flags = ALLOWED_ON_ABSENT_FS,
2078 .op_rsize_bop = nfsd4_getattr_rsize,
2079 .op_name = "OP_GETATTR",
2080 },
2081 [OP_GETFH] = {
2082 .op_func = (nfsd4op_func)nfsd4_getfh,
2083 .op_name = "OP_GETFH",
2084 },
2085 [OP_LINK] = {
2086 .op_func = (nfsd4op_func)nfsd4_link,
2087 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2088 | OP_CACHEME,
2089 .op_name = "OP_LINK",
2090 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
2091 },
2092 [OP_LOCK] = {
2093 .op_func = (nfsd4op_func)nfsd4_lock,
2094 .op_flags = OP_MODIFIES_SOMETHING,
2095 .op_name = "OP_LOCK",
2096 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
2097 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
2098 },
2099 [OP_LOCKT] = {
2100 .op_func = (nfsd4op_func)nfsd4_lockt,
2101 .op_name = "OP_LOCKT",
2102 },
2103 [OP_LOCKU] = {
2104 .op_func = (nfsd4op_func)nfsd4_locku,
2105 .op_flags = OP_MODIFIES_SOMETHING,
2106 .op_name = "OP_LOCKU",
2107 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2108 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
2109 },
2110 [OP_LOOKUP] = {
2111 .op_func = (nfsd4op_func)nfsd4_lookup,
2112 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2113 .op_name = "OP_LOOKUP",
2114 },
2115 [OP_LOOKUPP] = {
2116 .op_func = (nfsd4op_func)nfsd4_lookupp,
2117 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2118 .op_name = "OP_LOOKUPP",
2119 },
2120 [OP_NVERIFY] = {
2121 .op_func = (nfsd4op_func)nfsd4_nverify,
2122 .op_name = "OP_NVERIFY",
2123 },
2124 [OP_OPEN] = {
2125 .op_func = (nfsd4op_func)nfsd4_open,
2126 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2127 .op_name = "OP_OPEN",
2128 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
2129 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
2130 },
2131 [OP_OPEN_CONFIRM] = {
2132 .op_func = (nfsd4op_func)nfsd4_open_confirm,
2133 .op_flags = OP_MODIFIES_SOMETHING,
2134 .op_name = "OP_OPEN_CONFIRM",
2135 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2136 },
2137 [OP_OPEN_DOWNGRADE] = {
2138 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
2139 .op_flags = OP_MODIFIES_SOMETHING,
2140 .op_name = "OP_OPEN_DOWNGRADE",
2141 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2142 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2143 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
2144 },
2145 [OP_PUTFH] = {
2146 .op_func = (nfsd4op_func)nfsd4_putfh,
2147 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2148 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2149 .op_name = "OP_PUTFH",
2150 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2151 },
2152 [OP_PUTPUBFH] = {
2153 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2154 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2155 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2156 .op_name = "OP_PUTPUBFH",
2157 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2158 },
2159 [OP_PUTROOTFH] = {
2160 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2161 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2162 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2163 .op_name = "OP_PUTROOTFH",
2164 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2165 },
2166 [OP_READ] = {
2167 .op_func = (nfsd4op_func)nfsd4_read,
2168 .op_name = "OP_READ",
2169 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
2170 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
2171 },
2172 [OP_READDIR] = {
2173 .op_func = (nfsd4op_func)nfsd4_readdir,
2174 .op_name = "OP_READDIR",
2175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
2176 },
2177 [OP_READLINK] = {
2178 .op_func = (nfsd4op_func)nfsd4_readlink,
2179 .op_name = "OP_READLINK",
2180 },
2181 [OP_REMOVE] = {
2182 .op_func = (nfsd4op_func)nfsd4_remove,
2183 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2184 .op_name = "OP_REMOVE",
2185 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
2186 },
2187 [OP_RENAME] = {
2188 .op_func = (nfsd4op_func)nfsd4_rename,
2189 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2190 .op_name = "OP_RENAME",
2191 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
2192 },
2193 [OP_RENEW] = {
2194 .op_func = (nfsd4op_func)nfsd4_renew,
2195 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2196 | OP_MODIFIES_SOMETHING,
2197 .op_name = "OP_RENEW",
2198 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2199
2200 },
2201 [OP_RESTOREFH] = {
2202 .op_func = (nfsd4op_func)nfsd4_restorefh,
2203 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2204 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2205 .op_name = "OP_RESTOREFH",
2206 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2207 },
2208 [OP_SAVEFH] = {
2209 .op_func = (nfsd4op_func)nfsd4_savefh,
2210 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2211 .op_name = "OP_SAVEFH",
2212 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2213 },
2214 [OP_SECINFO] = {
2215 .op_func = (nfsd4op_func)nfsd4_secinfo,
2216 .op_flags = OP_HANDLES_WRONGSEC,
2217 .op_name = "OP_SECINFO",
2218 },
2219 [OP_SETATTR] = {
2220 .op_func = (nfsd4op_func)nfsd4_setattr,
2221 .op_name = "OP_SETATTR",
2222 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2223 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
2224 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
2225 },
2226 [OP_SETCLIENTID] = {
2227 .op_func = (nfsd4op_func)nfsd4_setclientid,
2228 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2229 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2230 .op_name = "OP_SETCLIENTID",
2231 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
2232 },
2233 [OP_SETCLIENTID_CONFIRM] = {
2234 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
2235 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2236 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2237 .op_name = "OP_SETCLIENTID_CONFIRM",
2238 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2239 },
2240 [OP_VERIFY] = {
2241 .op_func = (nfsd4op_func)nfsd4_verify,
2242 .op_name = "OP_VERIFY",
2243 },
2244 [OP_WRITE] = {
2245 .op_func = (nfsd4op_func)nfsd4_write,
2246 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2247 .op_name = "OP_WRITE",
2248 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2249 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
2250 },
2251 [OP_RELEASE_LOCKOWNER] = {
2252 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
2253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2254 | OP_MODIFIES_SOMETHING,
2255 .op_name = "OP_RELEASE_LOCKOWNER",
2256 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2257 },
2258
2259 /* NFSv4.1 operations */
2260 [OP_EXCHANGE_ID] = {
2261 .op_func = (nfsd4op_func)nfsd4_exchange_id,
2262 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2263 | OP_MODIFIES_SOMETHING,
2264 .op_name = "OP_EXCHANGE_ID",
2265 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
2266 },
2267 [OP_BACKCHANNEL_CTL] = {
2268 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2269 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2270 .op_name = "OP_BACKCHANNEL_CTL",
2271 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2272 },
2273 [OP_BIND_CONN_TO_SESSION] = {
2274 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
2275 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2276 | OP_MODIFIES_SOMETHING,
2277 .op_name = "OP_BIND_CONN_TO_SESSION",
2278 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
2279 },
2280 [OP_CREATE_SESSION] = {
2281 .op_func = (nfsd4op_func)nfsd4_create_session,
2282 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2283 | OP_MODIFIES_SOMETHING,
2284 .op_name = "OP_CREATE_SESSION",
2285 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
2286 },
2287 [OP_DESTROY_SESSION] = {
2288 .op_func = (nfsd4op_func)nfsd4_destroy_session,
2289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2290 | OP_MODIFIES_SOMETHING,
2291 .op_name = "OP_DESTROY_SESSION",
2292 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2293 },
2294 [OP_SEQUENCE] = {
2295 .op_func = (nfsd4op_func)nfsd4_sequence,
2296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2297 .op_name = "OP_SEQUENCE",
2298 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
2299 },
2300 [OP_DESTROY_CLIENTID] = {
2301 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
2302 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2303 | OP_MODIFIES_SOMETHING,
2304 .op_name = "OP_DESTROY_CLIENTID",
2305 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2306 },
2307 [OP_RECLAIM_COMPLETE] = {
2308 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
2309 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2310 .op_name = "OP_RECLAIM_COMPLETE",
2311 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2312 },
2313 [OP_SECINFO_NO_NAME] = {
2314 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
2315 .op_flags = OP_HANDLES_WRONGSEC,
2316 .op_name = "OP_SECINFO_NO_NAME",
2317 },
2318 [OP_TEST_STATEID] = {
2319 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2320 .op_flags = ALLOWED_WITHOUT_FH,
2321 .op_name = "OP_TEST_STATEID",
2322 },
2323 [OP_FREE_STATEID] = {
2324 .op_func = (nfsd4op_func)nfsd4_free_stateid,
2325 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2326 .op_name = "OP_FREE_STATEID",
2327 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
2328 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2329 },
2330#ifdef CONFIG_NFSD_PNFS
2331 [OP_GETDEVICEINFO] = {
2332 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2333 .op_flags = ALLOWED_WITHOUT_FH,
2334 .op_name = "OP_GETDEVICEINFO",
2335 },
2336 [OP_LAYOUTGET] = {
2337 .op_func = (nfsd4op_func)nfsd4_layoutget,
2338 .op_flags = OP_MODIFIES_SOMETHING,
2339 .op_name = "OP_LAYOUTGET",
2340 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2341 },
2342 [OP_LAYOUTCOMMIT] = {
2343 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2344 .op_flags = OP_MODIFIES_SOMETHING,
2345 .op_name = "OP_LAYOUTCOMMIT",
2346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2347 },
2348 [OP_LAYOUTRETURN] = {
2349 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2350 .op_flags = OP_MODIFIES_SOMETHING,
2351 .op_name = "OP_LAYOUTRETURN",
2352 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2353 },
2354#endif /* CONFIG_NFSD_PNFS */
2355
2356 /* NFSv4.2 operations */
2357 [OP_ALLOCATE] = {
2358 .op_func = (nfsd4op_func)nfsd4_allocate,
2359 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2360 .op_name = "OP_ALLOCATE",
2361 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2362 },
2363 [OP_DEALLOCATE] = {
2364 .op_func = (nfsd4op_func)nfsd4_deallocate,
2365 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2366 .op_name = "OP_DEALLOCATE",
2367 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2368 },
2369 [OP_CLONE] = {
2370 .op_func = (nfsd4op_func)nfsd4_clone,
2371 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2372 .op_name = "OP_CLONE",
2373 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2374 },
2375 [OP_COPY] = {
2376 .op_func = (nfsd4op_func)nfsd4_copy,
2377 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2378 .op_name = "OP_COPY",
2379 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2380 },
2381 [OP_SEEK] = {
2382 .op_func = (nfsd4op_func)nfsd4_seek,
2383 .op_name = "OP_SEEK",
2384 },
2385};
2386
2387/**
2388 * nfsd4_spo_must_allow - Determine if the compound op contains an
2389 * operation that is allowed to be sent with machine credentials
2390 *
2391 * @rqstp: a pointer to the struct svc_rqst
2392 *
2393 * Checks to see if the compound contains a spo_must_allow op
2394 * and confirms that it was sent with the proper machine creds.
2395 */
2396
2397bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2398{
2399 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2400 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2401 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2402 struct nfsd4_compound_state *cstate = &resp->cstate;
2403 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2404 u32 opiter;
2405
2406 if (!cstate->minorversion)
2407 return false;
2408
2409 if (cstate->spo_must_allowed == true)
2410 return true;
2411
2412 opiter = resp->opcnt;
2413 while (opiter < argp->opcnt) {
2414 this = &argp->ops[opiter++];
2415 if (test_bit(this->opnum, allow->u.longs) &&
2416 cstate->clp->cl_mach_cred &&
2417 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2418 cstate->spo_must_allowed = true;
2419 return true;
2420 }
2421 }
2422 cstate->spo_must_allowed = false;
2423 return false;
2424}
2425
2426int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2427{
2428 struct nfsd4_operation *opdesc;
2429 nfsd4op_rsize estimator;
2430
2431 if (op->opnum == OP_ILLEGAL)
2432 return op_encode_hdr_size * sizeof(__be32);
2433 opdesc = OPDESC(op);
2434 estimator = opdesc->op_rsize_bop;
2435 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2436}
2437
2438void warn_on_nonidempotent_op(struct nfsd4_op *op)
2439{
2440 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2441 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2442 op->opnum, nfsd4_op_name(op->opnum));
2443 WARN_ON_ONCE(1);
2444 }
2445}
2446
2447static const char *nfsd4_op_name(unsigned opnum)
2448{
2449 if (opnum < ARRAY_SIZE(nfsd4_ops))
2450 return nfsd4_ops[opnum].op_name;
2451 return "unknown_operation";
2452}
2453
2454#define nfsd4_voidres nfsd4_voidargs
2455struct nfsd4_voidargs { int dummy; };
2456
2457static struct svc_procedure nfsd_procedures4[2] = {
2458 [NFSPROC4_NULL] = {
2459 .pc_func = (svc_procfunc) nfsd4_proc_null,
2460 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2461 .pc_argsize = sizeof(struct nfsd4_voidargs),
2462 .pc_ressize = sizeof(struct nfsd4_voidres),
2463 .pc_cachetype = RC_NOCACHE,
2464 .pc_xdrressize = 1,
2465 },
2466 [NFSPROC4_COMPOUND] = {
2467 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2468 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2469 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2470 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2471 .pc_ressize = sizeof(struct nfsd4_compoundres),
2472 .pc_release = nfsd4_release_compoundargs,
2473 .pc_cachetype = RC_NOCACHE,
2474 .pc_xdrressize = NFSD_BUFSIZE/4,
2475 },
2476};
2477
2478struct svc_version nfsd_version4 = {
2479 .vs_vers = 4,
2480 .vs_nproc = 2,
2481 .vs_proc = nfsd_procedures4,
2482 .vs_dispatch = nfsd_dispatch,
2483 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2484 .vs_rpcb_optnl = 1,
2485};
2486
2487/*
2488 * Local variables:
2489 * c-basic-offset: 8
2490 * End:
2491 */