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