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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/falloc.h>
37#include <linux/slab.h>
38
39#include "idmap.h"
40#include "cache.h"
41#include "xdr4.h"
42#include "vfs.h"
43#include "current_stateid.h"
44#include "netns.h"
45#include "acl.h"
46#include "pnfs.h"
47#include "trace.h"
48
49#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50#include <linux/security.h>
51
52static inline void
53nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
54{
55 struct inode *inode = d_inode(resfh->fh_dentry);
56 int status;
57
58 inode_lock(inode);
59 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
61 inode_unlock(inode);
62
63 if (status)
64 /*
65 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
68 */
69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
70
71 return;
72}
73#else
74static inline void
75nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
76{ }
77#endif
78
79#define NFSDDBG_FACILITY NFSDDBG_PROC
80
81static u32 nfsd_attrmask[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0,
83 NFSD_WRITEABLE_ATTRS_WORD1,
84 NFSD_WRITEABLE_ATTRS_WORD2
85};
86
87static u32 nfsd41_ex_attrmask[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
91};
92
93static __be32
94check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
95 u32 *bmval, u32 *writable)
96{
97 struct dentry *dentry = cstate->current_fh.fh_dentry;
98
99 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
100 return nfserr_attrnotsupp;
101 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
102 return nfserr_attrnotsupp;
103 if (writable && !bmval_is_subset(bmval, writable))
104 return nfserr_inval;
105 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
106 (bmval[1] & FATTR4_WORD1_MODE))
107 return nfserr_inval;
108 return nfs_ok;
109}
110
111static __be32
112nfsd4_check_open_attributes(struct svc_rqst *rqstp,
113 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
114{
115 __be32 status = nfs_ok;
116
117 if (open->op_create == NFS4_OPEN_CREATE) {
118 if (open->op_createmode == NFS4_CREATE_UNCHECKED
119 || open->op_createmode == NFS4_CREATE_GUARDED)
120 status = check_attr_support(rqstp, cstate,
121 open->op_bmval, nfsd_attrmask);
122 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
123 status = check_attr_support(rqstp, cstate,
124 open->op_bmval, nfsd41_ex_attrmask);
125 }
126
127 return status;
128}
129
130static int
131is_create_with_attrs(struct nfsd4_open *open)
132{
133 return open->op_create == NFS4_OPEN_CREATE
134 && (open->op_createmode == NFS4_CREATE_UNCHECKED
135 || open->op_createmode == NFS4_CREATE_GUARDED
136 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
137}
138
139/*
140 * if error occurs when setting the acl, just clear the acl bit
141 * in the returned attr bitmap.
142 */
143static void
144do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
145 struct nfs4_acl *acl, u32 *bmval)
146{
147 __be32 status;
148
149 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
150 if (status)
151 /*
152 * We should probably fail the whole open at this point,
153 * but we've already created the file, so it's too late;
154 * So this seems the least of evils:
155 */
156 bmval[0] &= ~FATTR4_WORD0_ACL;
157}
158
159static inline void
160fh_dup2(struct svc_fh *dst, struct svc_fh *src)
161{
162 fh_put(dst);
163 dget(src->fh_dentry);
164 if (src->fh_export)
165 exp_get(src->fh_export);
166 *dst = *src;
167}
168
169static __be32
170do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
171{
172 __be32 status;
173
174 if (open->op_truncate &&
175 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
176 return nfserr_inval;
177
178 accmode |= NFSD_MAY_READ_IF_EXEC;
179
180 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
181 accmode |= NFSD_MAY_READ;
182 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
183 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
184 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
185 accmode |= NFSD_MAY_WRITE;
186
187 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
188
189 return status;
190}
191
192static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
193{
194 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
195
196 if (S_ISREG(mode))
197 return nfs_ok;
198 if (S_ISDIR(mode))
199 return nfserr_isdir;
200 /*
201 * Using err_symlink as our catch-all case may look odd; but
202 * there's no other obvious error for this case in 4.0, and we
203 * happen to know that it will cause the linux v4 client to do
204 * the right thing on attempts to open something other than a
205 * regular file.
206 */
207 return nfserr_symlink;
208}
209
210static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
211{
212 if (nfsd4_has_session(cstate))
213 return;
214 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
215 &resfh->fh_handle);
216}
217
218static __be32
219do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
220{
221 struct svc_fh *current_fh = &cstate->current_fh;
222 int accmode;
223 __be32 status;
224
225 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
226 if (!*resfh)
227 return nfserr_jukebox;
228 fh_init(*resfh, NFS4_FHSIZE);
229 open->op_truncate = 0;
230
231 if (open->op_create) {
232 /* FIXME: check session persistence and pnfs flags.
233 * The nfsv4.1 spec requires the following semantics:
234 *
235 * Persistent | pNFS | Server REQUIRED | Client Allowed
236 * Reply Cache | server | |
237 * -------------+--------+-----------------+--------------------
238 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
239 * | | | (SHOULD)
240 * | | and EXCLUSIVE4 | or EXCLUSIVE4
241 * | | | (SHOULD NOT)
242 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
243 * yes | no | GUARDED4 | GUARDED4
244 * yes | yes | GUARDED4 | GUARDED4
245 */
246
247 /*
248 * Note: create modes (UNCHECKED,GUARDED...) are the same
249 * in NFSv4 as in v3 except EXCLUSIVE4_1.
250 */
251 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
252 open->op_fname.len, &open->op_iattr,
253 *resfh, open->op_createmode,
254 (u32 *)open->op_verf.data,
255 &open->op_truncate, &open->op_created);
256
257 if (!status && open->op_label.len)
258 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
259
260 /*
261 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
262 * use the returned bitmask to indicate which attributes
263 * we used to store the verifier:
264 */
265 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
266 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
267 FATTR4_WORD1_TIME_MODIFY);
268 } else
269 /*
270 * Note this may exit with the parent still locked.
271 * We will hold the lock until nfsd4_open's final
272 * lookup, to prevent renames or unlinks until we've had
273 * a chance to an acquire a delegation if appropriate.
274 */
275 status = nfsd_lookup(rqstp, current_fh,
276 open->op_fname.data, open->op_fname.len, *resfh);
277 if (status)
278 goto out;
279 status = nfsd_check_obj_isreg(*resfh);
280 if (status)
281 goto out;
282
283 if (is_create_with_attrs(open) && open->op_acl != NULL)
284 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
285
286 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
287 accmode = NFSD_MAY_NOP;
288 if (open->op_created ||
289 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
290 accmode |= NFSD_MAY_OWNER_OVERRIDE;
291 status = do_open_permission(rqstp, *resfh, open, accmode);
292 set_change_info(&open->op_cinfo, current_fh);
293out:
294 return status;
295}
296
297static __be32
298do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
299{
300 struct svc_fh *current_fh = &cstate->current_fh;
301 __be32 status;
302 int accmode = 0;
303
304 /* We don't know the target directory, and therefore can not
305 * set the change info
306 */
307
308 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
309
310 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
311
312 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
313 (open->op_iattr.ia_size == 0);
314 /*
315 * In the delegation case, the client is telling us about an
316 * open that it *already* performed locally, some time ago. We
317 * should let it succeed now if possible.
318 *
319 * In the case of a CLAIM_FH open, on the other hand, the client
320 * may be counting on us to enforce permissions (the Linux 4.1
321 * client uses this for normal opens, for example).
322 */
323 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
324 accmode = NFSD_MAY_OWNER_OVERRIDE;
325
326 status = do_open_permission(rqstp, current_fh, open, accmode);
327
328 return status;
329}
330
331static void
332copy_clientid(clientid_t *clid, struct nfsd4_session *session)
333{
334 struct nfsd4_sessionid *sid =
335 (struct nfsd4_sessionid *)session->se_sessionid.data;
336
337 clid->cl_boot = sid->clientid.cl_boot;
338 clid->cl_id = sid->clientid.cl_id;
339}
340
341static __be32
342nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
343 struct nfsd4_open *open)
344{
345 __be32 status;
346 struct svc_fh *resfh = NULL;
347 struct net *net = SVC_NET(rqstp);
348 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
349
350 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
351 (int)open->op_fname.len, open->op_fname.data,
352 open->op_openowner);
353
354 /* This check required by spec. */
355 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
356 return nfserr_inval;
357
358 open->op_created = 0;
359 /*
360 * RFC5661 18.51.3
361 * Before RECLAIM_COMPLETE done, server should deny new lock
362 */
363 if (nfsd4_has_session(cstate) &&
364 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
365 &cstate->session->se_client->cl_flags) &&
366 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
367 return nfserr_grace;
368
369 if (nfsd4_has_session(cstate))
370 copy_clientid(&open->op_clientid, cstate->session);
371
372 /* check seqid for replay. set nfs4_owner */
373 status = nfsd4_process_open1(cstate, open, nn);
374 if (status == nfserr_replay_me) {
375 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
376 fh_put(&cstate->current_fh);
377 fh_copy_shallow(&cstate->current_fh.fh_handle,
378 &rp->rp_openfh);
379 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
380 if (status)
381 dprintk("nfsd4_open: replay failed"
382 " restoring previous filehandle\n");
383 else
384 status = nfserr_replay_me;
385 }
386 if (status)
387 goto out;
388 if (open->op_xdr_error) {
389 status = open->op_xdr_error;
390 goto out;
391 }
392
393 status = nfsd4_check_open_attributes(rqstp, cstate, open);
394 if (status)
395 goto out;
396
397 /* Openowner is now set, so sequence id will get bumped. Now we need
398 * these checks before we do any creates: */
399 status = nfserr_grace;
400 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
401 goto out;
402 status = nfserr_no_grace;
403 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
404 goto out;
405
406 switch (open->op_claim_type) {
407 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
408 case NFS4_OPEN_CLAIM_NULL:
409 status = do_open_lookup(rqstp, cstate, open, &resfh);
410 if (status)
411 goto out;
412 break;
413 case NFS4_OPEN_CLAIM_PREVIOUS:
414 status = nfs4_check_open_reclaim(&open->op_clientid,
415 cstate, nn);
416 if (status)
417 goto out;
418 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
419 case NFS4_OPEN_CLAIM_FH:
420 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
421 status = do_open_fhandle(rqstp, cstate, open);
422 if (status)
423 goto out;
424 resfh = &cstate->current_fh;
425 break;
426 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
427 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
428 dprintk("NFSD: unsupported OPEN claim type %d\n",
429 open->op_claim_type);
430 status = nfserr_notsupp;
431 goto out;
432 default:
433 dprintk("NFSD: Invalid OPEN claim type %d\n",
434 open->op_claim_type);
435 status = nfserr_inval;
436 goto out;
437 }
438 /*
439 * nfsd4_process_open2() does the actual opening of the file. If
440 * successful, it (1) truncates the file if open->op_truncate was
441 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
442 */
443 status = nfsd4_process_open2(rqstp, resfh, open);
444 WARN(status && open->op_created,
445 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
446 be32_to_cpu(status));
447out:
448 if (resfh && resfh != &cstate->current_fh) {
449 fh_dup2(&cstate->current_fh, resfh);
450 fh_put(resfh);
451 kfree(resfh);
452 }
453 nfsd4_cleanup_open_state(cstate, open);
454 nfsd4_bump_seqid(cstate, status);
455 return status;
456}
457
458/*
459 * OPEN is the only seqid-mutating operation whose decoding can fail
460 * with a seqid-mutating error (specifically, decoding of user names in
461 * the attributes). Therefore we have to do some processing to look up
462 * the stateowner so that we can bump the seqid.
463 */
464static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
465{
466 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
467
468 if (!seqid_mutating_err(ntohl(op->status)))
469 return op->status;
470 if (nfsd4_has_session(cstate))
471 return op->status;
472 open->op_xdr_error = op->status;
473 return nfsd4_open(rqstp, cstate, open);
474}
475
476/*
477 * filehandle-manipulating ops.
478 */
479static __be32
480nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
481 struct svc_fh **getfh)
482{
483 if (!cstate->current_fh.fh_dentry)
484 return nfserr_nofilehandle;
485
486 *getfh = &cstate->current_fh;
487 return nfs_ok;
488}
489
490static __be32
491nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
492 struct nfsd4_putfh *putfh)
493{
494 fh_put(&cstate->current_fh);
495 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
496 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
497 putfh->pf_fhlen);
498 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
499}
500
501static __be32
502nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 void *arg)
504{
505 __be32 status;
506
507 fh_put(&cstate->current_fh);
508 status = exp_pseudoroot(rqstp, &cstate->current_fh);
509 return status;
510}
511
512static __be32
513nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
514 void *arg)
515{
516 if (!cstate->save_fh.fh_dentry)
517 return nfserr_restorefh;
518
519 fh_dup2(&cstate->current_fh, &cstate->save_fh);
520 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
521 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
522 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
523 }
524 return nfs_ok;
525}
526
527static __be32
528nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 void *arg)
530{
531 if (!cstate->current_fh.fh_dentry)
532 return nfserr_nofilehandle;
533
534 fh_dup2(&cstate->save_fh, &cstate->current_fh);
535 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
536 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
537 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
538 }
539 return nfs_ok;
540}
541
542/*
543 * misc nfsv4 ops
544 */
545static __be32
546nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 struct nfsd4_access *access)
548{
549 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
550 return nfserr_inval;
551
552 access->ac_resp_access = access->ac_req_access;
553 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
554 &access->ac_supported);
555}
556
557static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
558{
559 __be32 verf[2];
560 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
561
562 /*
563 * This is opaque to client, so no need to byte-swap. Use
564 * __force to keep sparse happy
565 */
566 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
567 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
568 memcpy(verifier->data, verf, sizeof(verifier->data));
569}
570
571static __be32
572nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
573 struct nfsd4_commit *commit)
574{
575 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
576 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
577 commit->co_count);
578}
579
580static __be32
581nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 struct nfsd4_create *create)
583{
584 struct svc_fh resfh;
585 __be32 status;
586 dev_t rdev;
587
588 fh_init(&resfh, NFS4_FHSIZE);
589
590 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
591 if (status)
592 return status;
593
594 status = check_attr_support(rqstp, cstate, create->cr_bmval,
595 nfsd_attrmask);
596 if (status)
597 return status;
598
599 switch (create->cr_type) {
600 case NF4LNK:
601 status = nfsd_symlink(rqstp, &cstate->current_fh,
602 create->cr_name, create->cr_namelen,
603 create->cr_data, &resfh);
604 break;
605
606 case NF4BLK:
607 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
608 if (MAJOR(rdev) != create->cr_specdata1 ||
609 MINOR(rdev) != create->cr_specdata2)
610 return nfserr_inval;
611 status = nfsd_create(rqstp, &cstate->current_fh,
612 create->cr_name, create->cr_namelen,
613 &create->cr_iattr, S_IFBLK, rdev, &resfh);
614 break;
615
616 case NF4CHR:
617 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
618 if (MAJOR(rdev) != create->cr_specdata1 ||
619 MINOR(rdev) != create->cr_specdata2)
620 return nfserr_inval;
621 status = nfsd_create(rqstp, &cstate->current_fh,
622 create->cr_name, create->cr_namelen,
623 &create->cr_iattr,S_IFCHR, rdev, &resfh);
624 break;
625
626 case NF4SOCK:
627 status = nfsd_create(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
629 &create->cr_iattr, S_IFSOCK, 0, &resfh);
630 break;
631
632 case NF4FIFO:
633 status = nfsd_create(rqstp, &cstate->current_fh,
634 create->cr_name, create->cr_namelen,
635 &create->cr_iattr, S_IFIFO, 0, &resfh);
636 break;
637
638 case NF4DIR:
639 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFDIR, 0, &resfh);
643 break;
644
645 default:
646 status = nfserr_badtype;
647 }
648
649 if (status)
650 goto out;
651
652 if (create->cr_label.len)
653 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
654
655 if (create->cr_acl != NULL)
656 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
657 create->cr_bmval);
658
659 fh_unlock(&cstate->current_fh);
660 set_change_info(&create->cr_cinfo, &cstate->current_fh);
661 fh_dup2(&cstate->current_fh, &resfh);
662out:
663 fh_put(&resfh);
664 return status;
665}
666
667static __be32
668nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
669 struct nfsd4_getattr *getattr)
670{
671 __be32 status;
672
673 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
674 if (status)
675 return status;
676
677 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
678 return nfserr_inval;
679
680 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
681 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
682 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
683
684 getattr->ga_fhp = &cstate->current_fh;
685 return nfs_ok;
686}
687
688static __be32
689nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
690 struct nfsd4_link *link)
691{
692 __be32 status = nfserr_nofilehandle;
693
694 if (!cstate->save_fh.fh_dentry)
695 return status;
696 status = nfsd_link(rqstp, &cstate->current_fh,
697 link->li_name, link->li_namelen, &cstate->save_fh);
698 if (!status)
699 set_change_info(&link->li_cinfo, &cstate->current_fh);
700 return status;
701}
702
703static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
704{
705 struct svc_fh tmp_fh;
706 __be32 ret;
707
708 fh_init(&tmp_fh, NFS4_FHSIZE);
709 ret = exp_pseudoroot(rqstp, &tmp_fh);
710 if (ret)
711 return ret;
712 if (tmp_fh.fh_dentry == fh->fh_dentry) {
713 fh_put(&tmp_fh);
714 return nfserr_noent;
715 }
716 fh_put(&tmp_fh);
717 return nfsd_lookup(rqstp, fh, "..", 2, fh);
718}
719
720static __be32
721nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
722 void *arg)
723{
724 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
725}
726
727static __be32
728nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
729 struct nfsd4_lookup *lookup)
730{
731 return nfsd_lookup(rqstp, &cstate->current_fh,
732 lookup->lo_name, lookup->lo_len,
733 &cstate->current_fh);
734}
735
736static __be32
737nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
738 struct nfsd4_read *read)
739{
740 __be32 status;
741
742 read->rd_filp = NULL;
743 if (read->rd_offset >= OFFSET_MAX)
744 return nfserr_inval;
745
746 /*
747 * If we do a zero copy read, then a client will see read data
748 * that reflects the state of the file *after* performing the
749 * following compound.
750 *
751 * To ensure proper ordering, we therefore turn off zero copy if
752 * the client wants us to do more in this compound:
753 */
754 if (!nfsd4_last_compound_op(rqstp))
755 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
756
757 /* check stateid */
758 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
759 &read->rd_stateid, RD_STATE,
760 &read->rd_filp, &read->rd_tmp_file);
761 if (status) {
762 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
763 goto out;
764 }
765 status = nfs_ok;
766out:
767 read->rd_rqstp = rqstp;
768 read->rd_fhp = &cstate->current_fh;
769 return status;
770}
771
772static __be32
773nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
774 struct nfsd4_readdir *readdir)
775{
776 u64 cookie = readdir->rd_cookie;
777 static const nfs4_verifier zeroverf;
778
779 /* no need to check permission - this will be done in nfsd_readdir() */
780
781 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
782 return nfserr_inval;
783
784 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
785 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
786 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
787
788 if ((cookie == 1) || (cookie == 2) ||
789 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
790 return nfserr_bad_cookie;
791
792 readdir->rd_rqstp = rqstp;
793 readdir->rd_fhp = &cstate->current_fh;
794 return nfs_ok;
795}
796
797static __be32
798nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
799 struct nfsd4_readlink *readlink)
800{
801 readlink->rl_rqstp = rqstp;
802 readlink->rl_fhp = &cstate->current_fh;
803 return nfs_ok;
804}
805
806static __be32
807nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
808 struct nfsd4_remove *remove)
809{
810 __be32 status;
811
812 if (opens_in_grace(SVC_NET(rqstp)))
813 return nfserr_grace;
814 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
815 remove->rm_name, remove->rm_namelen);
816 if (!status) {
817 fh_unlock(&cstate->current_fh);
818 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
819 }
820 return status;
821}
822
823static __be32
824nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
825 struct nfsd4_rename *rename)
826{
827 __be32 status = nfserr_nofilehandle;
828
829 if (!cstate->save_fh.fh_dentry)
830 return status;
831 if (opens_in_grace(SVC_NET(rqstp)) &&
832 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
833 return nfserr_grace;
834 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
835 rename->rn_snamelen, &cstate->current_fh,
836 rename->rn_tname, rename->rn_tnamelen);
837 if (status)
838 return status;
839 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
840 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
841 return nfs_ok;
842}
843
844static __be32
845nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
846 struct nfsd4_secinfo *secinfo)
847{
848 struct svc_export *exp;
849 struct dentry *dentry;
850 __be32 err;
851
852 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
853 if (err)
854 return err;
855 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
856 secinfo->si_name, secinfo->si_namelen,
857 &exp, &dentry);
858 if (err)
859 return err;
860 fh_unlock(&cstate->current_fh);
861 if (d_really_is_negative(dentry)) {
862 exp_put(exp);
863 err = nfserr_noent;
864 } else
865 secinfo->si_exp = exp;
866 dput(dentry);
867 if (cstate->minorversion)
868 /* See rfc 5661 section 2.6.3.1.1.8 */
869 fh_put(&cstate->current_fh);
870 return err;
871}
872
873static __be32
874nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
875 struct nfsd4_secinfo_no_name *sin)
876{
877 __be32 err;
878
879 switch (sin->sin_style) {
880 case NFS4_SECINFO_STYLE4_CURRENT_FH:
881 break;
882 case NFS4_SECINFO_STYLE4_PARENT:
883 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
884 if (err)
885 return err;
886 break;
887 default:
888 return nfserr_inval;
889 }
890
891 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
892 fh_put(&cstate->current_fh);
893 return nfs_ok;
894}
895
896static __be32
897nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
898 struct nfsd4_setattr *setattr)
899{
900 __be32 status = nfs_ok;
901 int err;
902
903 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
904 status = nfs4_preprocess_stateid_op(rqstp, cstate,
905 &cstate->current_fh, &setattr->sa_stateid,
906 WR_STATE, NULL, NULL);
907 if (status) {
908 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
909 return status;
910 }
911 }
912 err = fh_want_write(&cstate->current_fh);
913 if (err)
914 return nfserrno(err);
915 status = nfs_ok;
916
917 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
918 nfsd_attrmask);
919 if (status)
920 goto out;
921
922 if (setattr->sa_acl != NULL)
923 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
924 setattr->sa_acl);
925 if (status)
926 goto out;
927 if (setattr->sa_label.len)
928 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
929 &setattr->sa_label);
930 if (status)
931 goto out;
932 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
933 0, (time_t)0);
934out:
935 fh_drop_write(&cstate->current_fh);
936 return status;
937}
938
939static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
940{
941 int i = 1;
942 int buflen = write->wr_buflen;
943
944 vec[0].iov_base = write->wr_head.iov_base;
945 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
946 buflen -= vec[0].iov_len;
947
948 while (buflen) {
949 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
950 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
951 buflen -= vec[i].iov_len;
952 i++;
953 }
954 return i;
955}
956
957static __be32
958nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
959 struct nfsd4_write *write)
960{
961 stateid_t *stateid = &write->wr_stateid;
962 struct file *filp = NULL;
963 __be32 status = nfs_ok;
964 unsigned long cnt;
965 int nvecs;
966
967 if (write->wr_offset >= OFFSET_MAX)
968 return nfserr_inval;
969
970 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
971 stateid, WR_STATE, &filp, NULL);
972 if (status) {
973 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
974 return status;
975 }
976
977 cnt = write->wr_buflen;
978 write->wr_how_written = write->wr_stable_how;
979 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
980
981 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
982 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
983
984 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
985 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
986 &write->wr_how_written);
987 fput(filp);
988
989 write->wr_bytes_written = cnt;
990
991 return status;
992}
993
994static __be32
995nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
996 stateid_t *src_stateid, struct file **src,
997 stateid_t *dst_stateid, struct file **dst)
998{
999 __be32 status;
1000
1001 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1002 src_stateid, RD_STATE, src, NULL);
1003 if (status) {
1004 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1005 goto out;
1006 }
1007
1008 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1009 dst_stateid, WR_STATE, dst, NULL);
1010 if (status) {
1011 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1012 goto out_put_src;
1013 }
1014
1015 /* fix up for NFS-specific error code */
1016 if (!S_ISREG(file_inode(*src)->i_mode) ||
1017 !S_ISREG(file_inode(*dst)->i_mode)) {
1018 status = nfserr_wrong_type;
1019 goto out_put_dst;
1020 }
1021
1022out:
1023 return status;
1024out_put_dst:
1025 fput(*dst);
1026out_put_src:
1027 fput(*src);
1028 goto out;
1029}
1030
1031static __be32
1032nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1033 struct nfsd4_clone *clone)
1034{
1035 struct file *src, *dst;
1036 __be32 status;
1037
1038 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1039 &clone->cl_dst_stateid, &dst);
1040 if (status)
1041 goto out;
1042
1043 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1044 dst, clone->cl_dst_pos, clone->cl_count);
1045
1046 fput(dst);
1047 fput(src);
1048out:
1049 return status;
1050}
1051
1052static __be32
1053nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1054 struct nfsd4_copy *copy)
1055{
1056 struct file *src, *dst;
1057 __be32 status;
1058 ssize_t bytes;
1059
1060 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1061 ©->cp_dst_stateid, &dst);
1062 if (status)
1063 goto out;
1064
1065 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1066 dst, copy->cp_dst_pos, copy->cp_count);
1067
1068 if (bytes < 0)
1069 status = nfserrno(bytes);
1070 else {
1071 copy->cp_res.wr_bytes_written = bytes;
1072 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1073 copy->cp_consecutive = 1;
1074 copy->cp_synchronous = 1;
1075 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1076 status = nfs_ok;
1077 }
1078
1079 fput(src);
1080 fput(dst);
1081out:
1082 return status;
1083}
1084
1085static __be32
1086nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1087 struct nfsd4_fallocate *fallocate, int flags)
1088{
1089 __be32 status = nfserr_notsupp;
1090 struct file *file;
1091
1092 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1093 &fallocate->falloc_stateid,
1094 WR_STATE, &file, NULL);
1095 if (status != nfs_ok) {
1096 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1097 return status;
1098 }
1099
1100 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1101 fallocate->falloc_offset,
1102 fallocate->falloc_length,
1103 flags);
1104 fput(file);
1105 return status;
1106}
1107
1108static __be32
1109nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1110 struct nfsd4_fallocate *fallocate)
1111{
1112 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1113}
1114
1115static __be32
1116nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1117 struct nfsd4_fallocate *fallocate)
1118{
1119 return nfsd4_fallocate(rqstp, cstate, fallocate,
1120 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1121}
1122
1123static __be32
1124nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1125 struct nfsd4_seek *seek)
1126{
1127 int whence;
1128 __be32 status;
1129 struct file *file;
1130
1131 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1132 &seek->seek_stateid,
1133 RD_STATE, &file, NULL);
1134 if (status) {
1135 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1136 return status;
1137 }
1138
1139 switch (seek->seek_whence) {
1140 case NFS4_CONTENT_DATA:
1141 whence = SEEK_DATA;
1142 break;
1143 case NFS4_CONTENT_HOLE:
1144 whence = SEEK_HOLE;
1145 break;
1146 default:
1147 status = nfserr_union_notsupp;
1148 goto out;
1149 }
1150
1151 /*
1152 * Note: This call does change file->f_pos, but nothing in NFSD
1153 * should ever file->f_pos.
1154 */
1155 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1156 if (seek->seek_pos < 0)
1157 status = nfserrno(seek->seek_pos);
1158 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1159 seek->seek_eof = true;
1160
1161out:
1162 fput(file);
1163 return status;
1164}
1165
1166/* This routine never returns NFS_OK! If there are no other errors, it
1167 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1168 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1169 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1170 */
1171static __be32
1172_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1173 struct nfsd4_verify *verify)
1174{
1175 __be32 *buf, *p;
1176 int count;
1177 __be32 status;
1178
1179 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1180 if (status)
1181 return status;
1182
1183 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1184 if (status)
1185 return status;
1186
1187 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1188 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1189 return nfserr_inval;
1190 if (verify->ve_attrlen & 3)
1191 return nfserr_inval;
1192
1193 /* count in words:
1194 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1195 */
1196 count = 4 + (verify->ve_attrlen >> 2);
1197 buf = kmalloc(count << 2, GFP_KERNEL);
1198 if (!buf)
1199 return nfserr_jukebox;
1200
1201 p = buf;
1202 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1203 cstate->current_fh.fh_export,
1204 cstate->current_fh.fh_dentry,
1205 verify->ve_bmval,
1206 rqstp, 0);
1207 /*
1208 * If nfsd4_encode_fattr() ran out of space, assume that's because
1209 * the attributes are longer (hence different) than those given:
1210 */
1211 if (status == nfserr_resource)
1212 status = nfserr_not_same;
1213 if (status)
1214 goto out_kfree;
1215
1216 /* skip bitmap */
1217 p = buf + 1 + ntohl(buf[0]);
1218 status = nfserr_not_same;
1219 if (ntohl(*p++) != verify->ve_attrlen)
1220 goto out_kfree;
1221 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1222 status = nfserr_same;
1223
1224out_kfree:
1225 kfree(buf);
1226 return status;
1227}
1228
1229static __be32
1230nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1231 struct nfsd4_verify *verify)
1232{
1233 __be32 status;
1234
1235 status = _nfsd4_verify(rqstp, cstate, verify);
1236 return status == nfserr_not_same ? nfs_ok : status;
1237}
1238
1239static __be32
1240nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1241 struct nfsd4_verify *verify)
1242{
1243 __be32 status;
1244
1245 status = _nfsd4_verify(rqstp, cstate, verify);
1246 return status == nfserr_same ? nfs_ok : status;
1247}
1248
1249#ifdef CONFIG_NFSD_PNFS
1250static const struct nfsd4_layout_ops *
1251nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1252{
1253 if (!exp->ex_layout_types) {
1254 dprintk("%s: export does not support pNFS\n", __func__);
1255 return NULL;
1256 }
1257
1258 if (!(exp->ex_layout_types & (1 << layout_type))) {
1259 dprintk("%s: layout type %d not supported\n",
1260 __func__, layout_type);
1261 return NULL;
1262 }
1263
1264 return nfsd4_layout_ops[layout_type];
1265}
1266
1267static __be32
1268nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1269 struct nfsd4_compound_state *cstate,
1270 struct nfsd4_getdeviceinfo *gdp)
1271{
1272 const struct nfsd4_layout_ops *ops;
1273 struct nfsd4_deviceid_map *map;
1274 struct svc_export *exp;
1275 __be32 nfserr;
1276
1277 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1278 __func__,
1279 gdp->gd_layout_type,
1280 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1281 gdp->gd_maxcount);
1282
1283 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1284 if (!map) {
1285 dprintk("%s: couldn't find device ID to export mapping!\n",
1286 __func__);
1287 return nfserr_noent;
1288 }
1289
1290 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1291 if (IS_ERR(exp)) {
1292 dprintk("%s: could not find device id\n", __func__);
1293 return nfserr_noent;
1294 }
1295
1296 nfserr = nfserr_layoutunavailable;
1297 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1298 if (!ops)
1299 goto out;
1300
1301 nfserr = nfs_ok;
1302 if (gdp->gd_maxcount != 0) {
1303 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1304 rqstp, cstate->session->se_client, gdp);
1305 }
1306
1307 gdp->gd_notify_types &= ops->notify_types;
1308out:
1309 exp_put(exp);
1310 return nfserr;
1311}
1312
1313static __be32
1314nfsd4_layoutget(struct svc_rqst *rqstp,
1315 struct nfsd4_compound_state *cstate,
1316 struct nfsd4_layoutget *lgp)
1317{
1318 struct svc_fh *current_fh = &cstate->current_fh;
1319 const struct nfsd4_layout_ops *ops;
1320 struct nfs4_layout_stateid *ls;
1321 __be32 nfserr;
1322 int accmode;
1323
1324 switch (lgp->lg_seg.iomode) {
1325 case IOMODE_READ:
1326 accmode = NFSD_MAY_READ;
1327 break;
1328 case IOMODE_RW:
1329 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1330 break;
1331 default:
1332 dprintk("%s: invalid iomode %d\n",
1333 __func__, lgp->lg_seg.iomode);
1334 nfserr = nfserr_badiomode;
1335 goto out;
1336 }
1337
1338 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1339 if (nfserr)
1340 goto out;
1341
1342 nfserr = nfserr_layoutunavailable;
1343 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1344 if (!ops)
1345 goto out;
1346
1347 /*
1348 * Verify minlength and range as per RFC5661:
1349 * o If loga_length is less than loga_minlength,
1350 * the metadata server MUST return NFS4ERR_INVAL.
1351 * o If the sum of loga_offset and loga_minlength exceeds
1352 * NFS4_UINT64_MAX, and loga_minlength is not
1353 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1354 * o If the sum of loga_offset and loga_length exceeds
1355 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1356 * the error NFS4ERR_INVAL MUST result.
1357 */
1358 nfserr = nfserr_inval;
1359 if (lgp->lg_seg.length < lgp->lg_minlength ||
1360 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1361 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1362 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1363 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1364 goto out;
1365 if (lgp->lg_seg.length == 0)
1366 goto out;
1367
1368 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1369 true, lgp->lg_layout_type, &ls);
1370 if (nfserr) {
1371 trace_layout_get_lookup_fail(&lgp->lg_sid);
1372 goto out;
1373 }
1374
1375 nfserr = nfserr_recallconflict;
1376 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1377 goto out_put_stid;
1378
1379 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1380 current_fh, lgp);
1381 if (nfserr)
1382 goto out_put_stid;
1383
1384 nfserr = nfsd4_insert_layout(lgp, ls);
1385
1386out_put_stid:
1387 mutex_unlock(&ls->ls_mutex);
1388 nfs4_put_stid(&ls->ls_stid);
1389out:
1390 return nfserr;
1391}
1392
1393static __be32
1394nfsd4_layoutcommit(struct svc_rqst *rqstp,
1395 struct nfsd4_compound_state *cstate,
1396 struct nfsd4_layoutcommit *lcp)
1397{
1398 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1399 struct svc_fh *current_fh = &cstate->current_fh;
1400 const struct nfsd4_layout_ops *ops;
1401 loff_t new_size = lcp->lc_last_wr + 1;
1402 struct inode *inode;
1403 struct nfs4_layout_stateid *ls;
1404 __be32 nfserr;
1405
1406 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1407 if (nfserr)
1408 goto out;
1409
1410 nfserr = nfserr_layoutunavailable;
1411 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1412 if (!ops)
1413 goto out;
1414 inode = d_inode(current_fh->fh_dentry);
1415
1416 nfserr = nfserr_inval;
1417 if (new_size <= seg->offset) {
1418 dprintk("pnfsd: last write before layout segment\n");
1419 goto out;
1420 }
1421 if (new_size > seg->offset + seg->length) {
1422 dprintk("pnfsd: last write beyond layout segment\n");
1423 goto out;
1424 }
1425 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1426 dprintk("pnfsd: layoutcommit beyond EOF\n");
1427 goto out;
1428 }
1429
1430 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1431 false, lcp->lc_layout_type,
1432 &ls);
1433 if (nfserr) {
1434 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1435 /* fixup error code as per RFC5661 */
1436 if (nfserr == nfserr_bad_stateid)
1437 nfserr = nfserr_badlayout;
1438 goto out;
1439 }
1440
1441 /* LAYOUTCOMMIT does not require any serialization */
1442 mutex_unlock(&ls->ls_mutex);
1443
1444 if (new_size > i_size_read(inode)) {
1445 lcp->lc_size_chg = 1;
1446 lcp->lc_newsize = new_size;
1447 } else {
1448 lcp->lc_size_chg = 0;
1449 }
1450
1451 nfserr = ops->proc_layoutcommit(inode, lcp);
1452 nfs4_put_stid(&ls->ls_stid);
1453out:
1454 return nfserr;
1455}
1456
1457static __be32
1458nfsd4_layoutreturn(struct svc_rqst *rqstp,
1459 struct nfsd4_compound_state *cstate,
1460 struct nfsd4_layoutreturn *lrp)
1461{
1462 struct svc_fh *current_fh = &cstate->current_fh;
1463 __be32 nfserr;
1464
1465 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1466 if (nfserr)
1467 goto out;
1468
1469 nfserr = nfserr_layoutunavailable;
1470 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1471 goto out;
1472
1473 switch (lrp->lr_seg.iomode) {
1474 case IOMODE_READ:
1475 case IOMODE_RW:
1476 case IOMODE_ANY:
1477 break;
1478 default:
1479 dprintk("%s: invalid iomode %d\n", __func__,
1480 lrp->lr_seg.iomode);
1481 nfserr = nfserr_inval;
1482 goto out;
1483 }
1484
1485 switch (lrp->lr_return_type) {
1486 case RETURN_FILE:
1487 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1488 break;
1489 case RETURN_FSID:
1490 case RETURN_ALL:
1491 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1492 break;
1493 default:
1494 dprintk("%s: invalid return_type %d\n", __func__,
1495 lrp->lr_return_type);
1496 nfserr = nfserr_inval;
1497 break;
1498 }
1499out:
1500 return nfserr;
1501}
1502#endif /* CONFIG_NFSD_PNFS */
1503
1504/*
1505 * NULL call.
1506 */
1507static __be32
1508nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1509{
1510 return nfs_ok;
1511}
1512
1513static inline void nfsd4_increment_op_stats(u32 opnum)
1514{
1515 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1516 nfsdstats.nfs4_opcount[opnum]++;
1517}
1518
1519typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1520 void *);
1521typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1522typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1523typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1524
1525enum nfsd4_op_flags {
1526 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1527 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1528 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1529 /* For rfc 5661 section 2.6.3.1.1: */
1530 OP_HANDLES_WRONGSEC = 1 << 3,
1531 OP_IS_PUTFH_LIKE = 1 << 4,
1532 /*
1533 * These are the ops whose result size we estimate before
1534 * encoding, to avoid performing an op then not being able to
1535 * respond or cache a response. This includes writes and setattrs
1536 * as well as the operations usually called "nonidempotent":
1537 */
1538 OP_MODIFIES_SOMETHING = 1 << 5,
1539 /*
1540 * Cache compounds containing these ops in the xid-based drc:
1541 * We use the DRC for compounds containing non-idempotent
1542 * operations, *except* those that are 4.1-specific (since
1543 * sessions provide their own EOS), and except for stateful
1544 * operations other than setclientid and setclientid_confirm
1545 * (since sequence numbers provide EOS for open, lock, etc in
1546 * the v4.0 case).
1547 */
1548 OP_CACHEME = 1 << 6,
1549 /*
1550 * These are ops which clear current state id.
1551 */
1552 OP_CLEAR_STATEID = 1 << 7,
1553};
1554
1555struct nfsd4_operation {
1556 nfsd4op_func op_func;
1557 u32 op_flags;
1558 char *op_name;
1559 /* Try to get response size before operation */
1560 nfsd4op_rsize op_rsize_bop;
1561 stateid_getter op_get_currentstateid;
1562 stateid_setter op_set_currentstateid;
1563};
1564
1565static struct nfsd4_operation nfsd4_ops[];
1566
1567static const char *nfsd4_op_name(unsigned opnum);
1568
1569/*
1570 * Enforce NFSv4.1 COMPOUND ordering rules:
1571 *
1572 * Also note, enforced elsewhere:
1573 * - SEQUENCE other than as first op results in
1574 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1575 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1576 * (Enforced in nfsd4_bind_conn_to_session().)
1577 * - DESTROY_SESSION must be the final operation in a compound, if
1578 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1579 * (Enforced in nfsd4_destroy_session().)
1580 */
1581static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1582{
1583 struct nfsd4_op *op = &args->ops[0];
1584
1585 /* These ordering requirements don't apply to NFSv4.0: */
1586 if (args->minorversion == 0)
1587 return nfs_ok;
1588 /* This is weird, but OK, not our problem: */
1589 if (args->opcnt == 0)
1590 return nfs_ok;
1591 if (op->status == nfserr_op_illegal)
1592 return nfs_ok;
1593 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1594 return nfserr_op_not_in_session;
1595 if (op->opnum == OP_SEQUENCE)
1596 return nfs_ok;
1597 if (args->opcnt != 1)
1598 return nfserr_not_only_op;
1599 return nfs_ok;
1600}
1601
1602static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1603{
1604 return &nfsd4_ops[op->opnum];
1605}
1606
1607bool nfsd4_cache_this_op(struct nfsd4_op *op)
1608{
1609 if (op->opnum == OP_ILLEGAL)
1610 return false;
1611 return OPDESC(op)->op_flags & OP_CACHEME;
1612}
1613
1614static bool need_wrongsec_check(struct svc_rqst *rqstp)
1615{
1616 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1617 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1618 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1619 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1620 struct nfsd4_operation *thisd;
1621 struct nfsd4_operation *nextd;
1622
1623 thisd = OPDESC(this);
1624 /*
1625 * Most ops check wronsec on our own; only the putfh-like ops
1626 * have special rules.
1627 */
1628 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1629 return false;
1630 /*
1631 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1632 * put-filehandle operation if we're not going to use the
1633 * result:
1634 */
1635 if (argp->opcnt == resp->opcnt)
1636 return false;
1637 if (next->opnum == OP_ILLEGAL)
1638 return false;
1639 nextd = OPDESC(next);
1640 /*
1641 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1642 * errors themselves as necessary; others should check for them
1643 * now:
1644 */
1645 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1646}
1647
1648static void svcxdr_init_encode(struct svc_rqst *rqstp,
1649 struct nfsd4_compoundres *resp)
1650{
1651 struct xdr_stream *xdr = &resp->xdr;
1652 struct xdr_buf *buf = &rqstp->rq_res;
1653 struct kvec *head = buf->head;
1654
1655 xdr->buf = buf;
1656 xdr->iov = head;
1657 xdr->p = head->iov_base + head->iov_len;
1658 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1659 /* Tail and page_len should be zero at this point: */
1660 buf->len = buf->head[0].iov_len;
1661 xdr->scratch.iov_len = 0;
1662 xdr->page_ptr = buf->pages - 1;
1663 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1664 - rqstp->rq_auth_slack;
1665}
1666
1667/*
1668 * COMPOUND call.
1669 */
1670static __be32
1671nfsd4_proc_compound(struct svc_rqst *rqstp,
1672 struct nfsd4_compoundargs *args,
1673 struct nfsd4_compoundres *resp)
1674{
1675 struct nfsd4_op *op;
1676 struct nfsd4_operation *opdesc;
1677 struct nfsd4_compound_state *cstate = &resp->cstate;
1678 struct svc_fh *current_fh = &cstate->current_fh;
1679 struct svc_fh *save_fh = &cstate->save_fh;
1680 __be32 status;
1681
1682 svcxdr_init_encode(rqstp, resp);
1683 resp->tagp = resp->xdr.p;
1684 /* reserve space for: taglen, tag, and opcnt */
1685 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1686 resp->taglen = args->taglen;
1687 resp->tag = args->tag;
1688 resp->rqstp = rqstp;
1689 cstate->minorversion = args->minorversion;
1690 fh_init(current_fh, NFS4_FHSIZE);
1691 fh_init(save_fh, NFS4_FHSIZE);
1692 /*
1693 * Don't use the deferral mechanism for NFSv4; compounds make it
1694 * too hard to avoid non-idempotency problems.
1695 */
1696 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1697
1698 /*
1699 * According to RFC3010, this takes precedence over all other errors.
1700 */
1701 status = nfserr_minor_vers_mismatch;
1702 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1703 goto out;
1704
1705 status = nfs41_check_op_ordering(args);
1706 if (status) {
1707 op = &args->ops[0];
1708 op->status = status;
1709 goto encode_op;
1710 }
1711
1712 while (!status && resp->opcnt < args->opcnt) {
1713 op = &args->ops[resp->opcnt++];
1714
1715 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1716 resp->opcnt, args->opcnt, op->opnum,
1717 nfsd4_op_name(op->opnum));
1718 /*
1719 * The XDR decode routines may have pre-set op->status;
1720 * for example, if there is a miscellaneous XDR error
1721 * it will be set to nfserr_bad_xdr.
1722 */
1723 if (op->status) {
1724 if (op->opnum == OP_OPEN)
1725 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1726 goto encode_op;
1727 }
1728
1729 opdesc = OPDESC(op);
1730
1731 if (!current_fh->fh_dentry) {
1732 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1733 op->status = nfserr_nofilehandle;
1734 goto encode_op;
1735 }
1736 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1737 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1738 op->status = nfserr_moved;
1739 goto encode_op;
1740 }
1741
1742 fh_clear_wcc(current_fh);
1743
1744 /* If op is non-idempotent */
1745 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1746 /*
1747 * Don't execute this op if we couldn't encode a
1748 * succesful reply:
1749 */
1750 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1751 /*
1752 * Plus if there's another operation, make sure
1753 * we'll have space to at least encode an error:
1754 */
1755 if (resp->opcnt < args->opcnt)
1756 plen += COMPOUND_ERR_SLACK_SPACE;
1757 op->status = nfsd4_check_resp_size(resp, plen);
1758 }
1759
1760 if (op->status)
1761 goto encode_op;
1762
1763 if (opdesc->op_get_currentstateid)
1764 opdesc->op_get_currentstateid(cstate, &op->u);
1765 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1766
1767 if (!op->status) {
1768 if (opdesc->op_set_currentstateid)
1769 opdesc->op_set_currentstateid(cstate, &op->u);
1770
1771 if (opdesc->op_flags & OP_CLEAR_STATEID)
1772 clear_current_stateid(cstate);
1773
1774 if (need_wrongsec_check(rqstp))
1775 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1776 }
1777
1778encode_op:
1779 /* Only from SEQUENCE */
1780 if (cstate->status == nfserr_replay_cache) {
1781 dprintk("%s NFS4.1 replay from cache\n", __func__);
1782 status = op->status;
1783 goto out;
1784 }
1785 if (op->status == nfserr_replay_me) {
1786 op->replay = &cstate->replay_owner->so_replay;
1787 nfsd4_encode_replay(&resp->xdr, op);
1788 status = op->status = op->replay->rp_status;
1789 } else {
1790 nfsd4_encode_operation(resp, op);
1791 status = op->status;
1792 }
1793
1794 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1795 args->ops, args->opcnt, resp->opcnt, op->opnum,
1796 be32_to_cpu(status));
1797
1798 nfsd4_cstate_clear_replay(cstate);
1799 nfsd4_increment_op_stats(op->opnum);
1800 }
1801
1802 cstate->status = status;
1803 fh_put(current_fh);
1804 fh_put(save_fh);
1805 BUG_ON(cstate->replay_owner);
1806out:
1807 /* Reset deferral mechanism for RPC deferrals */
1808 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1809 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1810 return status;
1811}
1812
1813#define op_encode_hdr_size (2)
1814#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1815#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1816#define op_encode_change_info_maxsz (5)
1817#define nfs4_fattr_bitmap_maxsz (4)
1818
1819/* We'll fall back on returning no lockowner if run out of space: */
1820#define op_encode_lockowner_maxsz (0)
1821#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1822
1823#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1824
1825#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1826#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1827 op_encode_ace_maxsz)
1828
1829#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1830
1831static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1832{
1833 return (op_encode_hdr_size) * sizeof(__be32);
1834}
1835
1836static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1837{
1838 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1839}
1840
1841static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1842{
1843 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1844}
1845
1846static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1847{
1848 return (op_encode_hdr_size + op_encode_change_info_maxsz
1849 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1850}
1851
1852/*
1853 * Note since this is an idempotent operation we won't insist on failing
1854 * the op prematurely if the estimate is too large. We may turn off splice
1855 * reads unnecessarily.
1856 */
1857static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1858 struct nfsd4_op *op)
1859{
1860 u32 *bmap = op->u.getattr.ga_bmval;
1861 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1862 u32 ret = 0;
1863
1864 if (bmap0 & FATTR4_WORD0_ACL)
1865 return svc_max_payload(rqstp);
1866 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1867 return svc_max_payload(rqstp);
1868
1869 if (bmap1 & FATTR4_WORD1_OWNER) {
1870 ret += IDMAP_NAMESZ + 4;
1871 bmap1 &= ~FATTR4_WORD1_OWNER;
1872 }
1873 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1874 ret += IDMAP_NAMESZ + 4;
1875 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1876 }
1877 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1878 ret += NFS4_FHSIZE + 4;
1879 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1880 }
1881 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1882 ret += NFS4_MAXLABELLEN + 12;
1883 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1884 }
1885 /*
1886 * Largest of remaining attributes are 16 bytes (e.g.,
1887 * supported_attributes)
1888 */
1889 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1890 /* bitmask, length */
1891 ret += 20;
1892 return ret;
1893}
1894
1895static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1896{
1897 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1898 * sizeof(__be32);
1899}
1900
1901static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1902{
1903 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1904 * sizeof(__be32);
1905}
1906
1907static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1908{
1909 return (op_encode_hdr_size + op_encode_stateid_maxsz
1910 + op_encode_change_info_maxsz + 1
1911 + nfs4_fattr_bitmap_maxsz
1912 + op_encode_delegation_maxsz) * sizeof(__be32);
1913}
1914
1915static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1916{
1917 u32 maxcount = 0, rlen = 0;
1918
1919 maxcount = svc_max_payload(rqstp);
1920 rlen = min(op->u.read.rd_length, maxcount);
1921
1922 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1923}
1924
1925static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1926{
1927 u32 maxcount = 0, rlen = 0;
1928
1929 maxcount = svc_max_payload(rqstp);
1930 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1931
1932 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1933 XDR_QUADLEN(rlen)) * sizeof(__be32);
1934}
1935
1936static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1937{
1938 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1939 * sizeof(__be32);
1940}
1941
1942static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1943{
1944 return (op_encode_hdr_size + op_encode_change_info_maxsz
1945 + op_encode_change_info_maxsz) * sizeof(__be32);
1946}
1947
1948static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1949 struct nfsd4_op *op)
1950{
1951 return (op_encode_hdr_size
1952 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1953}
1954
1955static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1956{
1957 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1958}
1959
1960static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961{
1962 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1963 sizeof(__be32);
1964}
1965
1966static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1967{
1968 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
1969}
1970
1971static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1972{
1973 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1974 1 + 1 + /* eir_flags, spr_how */\
1975 4 + /* spo_must_enforce & _allow with bitmap */\
1976 2 + /*eir_server_owner.so_minor_id */\
1977 /* eir_server_owner.so_major_id<> */\
1978 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1979 /* eir_server_scope<> */\
1980 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1981 1 + /* eir_server_impl_id array length */\
1982 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1983}
1984
1985static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1986{
1987 return (op_encode_hdr_size + \
1988 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1989 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1990}
1991
1992static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1993{
1994 return (op_encode_hdr_size + \
1995 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1996 2 + /* csr_sequence, csr_flags */\
1997 op_encode_channel_attrs_maxsz + \
1998 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1999}
2000
2001static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2002{
2003 return (op_encode_hdr_size +
2004 1 /* wr_callback */ +
2005 op_encode_stateid_maxsz /* wr_callback */ +
2006 2 /* wr_count */ +
2007 1 /* wr_committed */ +
2008 op_encode_verifier_maxsz +
2009 1 /* cr_consecutive */ +
2010 1 /* cr_synchronous */) * sizeof(__be32);
2011}
2012
2013#ifdef CONFIG_NFSD_PNFS
2014/*
2015 * At this stage we don't really know what layout driver will handle the request,
2016 * so we need to define an arbitrary upper bound here.
2017 */
2018#define MAX_LAYOUT_SIZE 128
2019static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size +
2022 1 /* logr_return_on_close */ +
2023 op_encode_stateid_maxsz +
2024 1 /* nr of layouts */ +
2025 MAX_LAYOUT_SIZE) * sizeof(__be32);
2026}
2027
2028static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2029{
2030 return (op_encode_hdr_size +
2031 1 /* locr_newsize */ +
2032 2 /* ns_size */) * sizeof(__be32);
2033}
2034
2035static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2036{
2037 return (op_encode_hdr_size +
2038 1 /* lrs_stateid */ +
2039 op_encode_stateid_maxsz) * sizeof(__be32);
2040}
2041#endif /* CONFIG_NFSD_PNFS */
2042
2043static struct nfsd4_operation nfsd4_ops[] = {
2044 [OP_ACCESS] = {
2045 .op_func = (nfsd4op_func)nfsd4_access,
2046 .op_name = "OP_ACCESS",
2047 },
2048 [OP_CLOSE] = {
2049 .op_func = (nfsd4op_func)nfsd4_close,
2050 .op_flags = OP_MODIFIES_SOMETHING,
2051 .op_name = "OP_CLOSE",
2052 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2053 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2054 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
2055 },
2056 [OP_COMMIT] = {
2057 .op_func = (nfsd4op_func)nfsd4_commit,
2058 .op_flags = OP_MODIFIES_SOMETHING,
2059 .op_name = "OP_COMMIT",
2060 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
2061 },
2062 [OP_CREATE] = {
2063 .op_func = (nfsd4op_func)nfsd4_create,
2064 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2065 .op_name = "OP_CREATE",
2066 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
2067 },
2068 [OP_DELEGRETURN] = {
2069 .op_func = (nfsd4op_func)nfsd4_delegreturn,
2070 .op_flags = OP_MODIFIES_SOMETHING,
2071 .op_name = "OP_DELEGRETURN",
2072 .op_rsize_bop = nfsd4_only_status_rsize,
2073 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
2074 },
2075 [OP_GETATTR] = {
2076 .op_func = (nfsd4op_func)nfsd4_getattr,
2077 .op_flags = ALLOWED_ON_ABSENT_FS,
2078 .op_rsize_bop = nfsd4_getattr_rsize,
2079 .op_name = "OP_GETATTR",
2080 },
2081 [OP_GETFH] = {
2082 .op_func = (nfsd4op_func)nfsd4_getfh,
2083 .op_name = "OP_GETFH",
2084 },
2085 [OP_LINK] = {
2086 .op_func = (nfsd4op_func)nfsd4_link,
2087 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2088 | OP_CACHEME,
2089 .op_name = "OP_LINK",
2090 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
2091 },
2092 [OP_LOCK] = {
2093 .op_func = (nfsd4op_func)nfsd4_lock,
2094 .op_flags = OP_MODIFIES_SOMETHING,
2095 .op_name = "OP_LOCK",
2096 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
2097 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
2098 },
2099 [OP_LOCKT] = {
2100 .op_func = (nfsd4op_func)nfsd4_lockt,
2101 .op_name = "OP_LOCKT",
2102 },
2103 [OP_LOCKU] = {
2104 .op_func = (nfsd4op_func)nfsd4_locku,
2105 .op_flags = OP_MODIFIES_SOMETHING,
2106 .op_name = "OP_LOCKU",
2107 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2108 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
2109 },
2110 [OP_LOOKUP] = {
2111 .op_func = (nfsd4op_func)nfsd4_lookup,
2112 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2113 .op_name = "OP_LOOKUP",
2114 },
2115 [OP_LOOKUPP] = {
2116 .op_func = (nfsd4op_func)nfsd4_lookupp,
2117 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2118 .op_name = "OP_LOOKUPP",
2119 },
2120 [OP_NVERIFY] = {
2121 .op_func = (nfsd4op_func)nfsd4_nverify,
2122 .op_name = "OP_NVERIFY",
2123 },
2124 [OP_OPEN] = {
2125 .op_func = (nfsd4op_func)nfsd4_open,
2126 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2127 .op_name = "OP_OPEN",
2128 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
2129 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
2130 },
2131 [OP_OPEN_CONFIRM] = {
2132 .op_func = (nfsd4op_func)nfsd4_open_confirm,
2133 .op_flags = OP_MODIFIES_SOMETHING,
2134 .op_name = "OP_OPEN_CONFIRM",
2135 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2136 },
2137 [OP_OPEN_DOWNGRADE] = {
2138 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
2139 .op_flags = OP_MODIFIES_SOMETHING,
2140 .op_name = "OP_OPEN_DOWNGRADE",
2141 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2142 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2143 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
2144 },
2145 [OP_PUTFH] = {
2146 .op_func = (nfsd4op_func)nfsd4_putfh,
2147 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2148 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2149 .op_name = "OP_PUTFH",
2150 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2151 },
2152 [OP_PUTPUBFH] = {
2153 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2154 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2155 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2156 .op_name = "OP_PUTPUBFH",
2157 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2158 },
2159 [OP_PUTROOTFH] = {
2160 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2161 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2162 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2163 .op_name = "OP_PUTROOTFH",
2164 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2165 },
2166 [OP_READ] = {
2167 .op_func = (nfsd4op_func)nfsd4_read,
2168 .op_name = "OP_READ",
2169 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
2170 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
2171 },
2172 [OP_READDIR] = {
2173 .op_func = (nfsd4op_func)nfsd4_readdir,
2174 .op_name = "OP_READDIR",
2175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
2176 },
2177 [OP_READLINK] = {
2178 .op_func = (nfsd4op_func)nfsd4_readlink,
2179 .op_name = "OP_READLINK",
2180 },
2181 [OP_REMOVE] = {
2182 .op_func = (nfsd4op_func)nfsd4_remove,
2183 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2184 .op_name = "OP_REMOVE",
2185 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
2186 },
2187 [OP_RENAME] = {
2188 .op_func = (nfsd4op_func)nfsd4_rename,
2189 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2190 .op_name = "OP_RENAME",
2191 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
2192 },
2193 [OP_RENEW] = {
2194 .op_func = (nfsd4op_func)nfsd4_renew,
2195 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2196 | OP_MODIFIES_SOMETHING,
2197 .op_name = "OP_RENEW",
2198 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2199
2200 },
2201 [OP_RESTOREFH] = {
2202 .op_func = (nfsd4op_func)nfsd4_restorefh,
2203 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2204 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2205 .op_name = "OP_RESTOREFH",
2206 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2207 },
2208 [OP_SAVEFH] = {
2209 .op_func = (nfsd4op_func)nfsd4_savefh,
2210 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2211 .op_name = "OP_SAVEFH",
2212 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2213 },
2214 [OP_SECINFO] = {
2215 .op_func = (nfsd4op_func)nfsd4_secinfo,
2216 .op_flags = OP_HANDLES_WRONGSEC,
2217 .op_name = "OP_SECINFO",
2218 },
2219 [OP_SETATTR] = {
2220 .op_func = (nfsd4op_func)nfsd4_setattr,
2221 .op_name = "OP_SETATTR",
2222 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2223 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
2224 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
2225 },
2226 [OP_SETCLIENTID] = {
2227 .op_func = (nfsd4op_func)nfsd4_setclientid,
2228 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2229 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2230 .op_name = "OP_SETCLIENTID",
2231 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
2232 },
2233 [OP_SETCLIENTID_CONFIRM] = {
2234 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
2235 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2236 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2237 .op_name = "OP_SETCLIENTID_CONFIRM",
2238 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2239 },
2240 [OP_VERIFY] = {
2241 .op_func = (nfsd4op_func)nfsd4_verify,
2242 .op_name = "OP_VERIFY",
2243 },
2244 [OP_WRITE] = {
2245 .op_func = (nfsd4op_func)nfsd4_write,
2246 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2247 .op_name = "OP_WRITE",
2248 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2249 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
2250 },
2251 [OP_RELEASE_LOCKOWNER] = {
2252 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
2253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2254 | OP_MODIFIES_SOMETHING,
2255 .op_name = "OP_RELEASE_LOCKOWNER",
2256 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2257 },
2258
2259 /* NFSv4.1 operations */
2260 [OP_EXCHANGE_ID] = {
2261 .op_func = (nfsd4op_func)nfsd4_exchange_id,
2262 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2263 | OP_MODIFIES_SOMETHING,
2264 .op_name = "OP_EXCHANGE_ID",
2265 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
2266 },
2267 [OP_BACKCHANNEL_CTL] = {
2268 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2269 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2270 .op_name = "OP_BACKCHANNEL_CTL",
2271 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2272 },
2273 [OP_BIND_CONN_TO_SESSION] = {
2274 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
2275 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2276 | OP_MODIFIES_SOMETHING,
2277 .op_name = "OP_BIND_CONN_TO_SESSION",
2278 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
2279 },
2280 [OP_CREATE_SESSION] = {
2281 .op_func = (nfsd4op_func)nfsd4_create_session,
2282 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2283 | OP_MODIFIES_SOMETHING,
2284 .op_name = "OP_CREATE_SESSION",
2285 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
2286 },
2287 [OP_DESTROY_SESSION] = {
2288 .op_func = (nfsd4op_func)nfsd4_destroy_session,
2289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2290 | OP_MODIFIES_SOMETHING,
2291 .op_name = "OP_DESTROY_SESSION",
2292 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2293 },
2294 [OP_SEQUENCE] = {
2295 .op_func = (nfsd4op_func)nfsd4_sequence,
2296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2297 .op_name = "OP_SEQUENCE",
2298 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
2299 },
2300 [OP_DESTROY_CLIENTID] = {
2301 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
2302 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2303 | OP_MODIFIES_SOMETHING,
2304 .op_name = "OP_DESTROY_CLIENTID",
2305 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2306 },
2307 [OP_RECLAIM_COMPLETE] = {
2308 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
2309 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2310 .op_name = "OP_RECLAIM_COMPLETE",
2311 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2312 },
2313 [OP_SECINFO_NO_NAME] = {
2314 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
2315 .op_flags = OP_HANDLES_WRONGSEC,
2316 .op_name = "OP_SECINFO_NO_NAME",
2317 },
2318 [OP_TEST_STATEID] = {
2319 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2320 .op_flags = ALLOWED_WITHOUT_FH,
2321 .op_name = "OP_TEST_STATEID",
2322 },
2323 [OP_FREE_STATEID] = {
2324 .op_func = (nfsd4op_func)nfsd4_free_stateid,
2325 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2326 .op_name = "OP_FREE_STATEID",
2327 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
2328 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2329 },
2330#ifdef CONFIG_NFSD_PNFS
2331 [OP_GETDEVICEINFO] = {
2332 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2333 .op_flags = ALLOWED_WITHOUT_FH,
2334 .op_name = "OP_GETDEVICEINFO",
2335 },
2336 [OP_LAYOUTGET] = {
2337 .op_func = (nfsd4op_func)nfsd4_layoutget,
2338 .op_flags = OP_MODIFIES_SOMETHING,
2339 .op_name = "OP_LAYOUTGET",
2340 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2341 },
2342 [OP_LAYOUTCOMMIT] = {
2343 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2344 .op_flags = OP_MODIFIES_SOMETHING,
2345 .op_name = "OP_LAYOUTCOMMIT",
2346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2347 },
2348 [OP_LAYOUTRETURN] = {
2349 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2350 .op_flags = OP_MODIFIES_SOMETHING,
2351 .op_name = "OP_LAYOUTRETURN",
2352 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2353 },
2354#endif /* CONFIG_NFSD_PNFS */
2355
2356 /* NFSv4.2 operations */
2357 [OP_ALLOCATE] = {
2358 .op_func = (nfsd4op_func)nfsd4_allocate,
2359 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2360 .op_name = "OP_ALLOCATE",
2361 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2362 },
2363 [OP_DEALLOCATE] = {
2364 .op_func = (nfsd4op_func)nfsd4_deallocate,
2365 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2366 .op_name = "OP_DEALLOCATE",
2367 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2368 },
2369 [OP_CLONE] = {
2370 .op_func = (nfsd4op_func)nfsd4_clone,
2371 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2372 .op_name = "OP_CLONE",
2373 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2374 },
2375 [OP_COPY] = {
2376 .op_func = (nfsd4op_func)nfsd4_copy,
2377 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2378 .op_name = "OP_COPY",
2379 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2380 },
2381 [OP_SEEK] = {
2382 .op_func = (nfsd4op_func)nfsd4_seek,
2383 .op_name = "OP_SEEK",
2384 },
2385};
2386
2387/**
2388 * nfsd4_spo_must_allow - Determine if the compound op contains an
2389 * operation that is allowed to be sent with machine credentials
2390 *
2391 * @rqstp: a pointer to the struct svc_rqst
2392 *
2393 * Checks to see if the compound contains a spo_must_allow op
2394 * and confirms that it was sent with the proper machine creds.
2395 */
2396
2397bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2398{
2399 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2400 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2401 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2402 struct nfsd4_compound_state *cstate = &resp->cstate;
2403 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2404 u32 opiter;
2405
2406 if (!cstate->minorversion)
2407 return false;
2408
2409 if (cstate->spo_must_allowed == true)
2410 return true;
2411
2412 opiter = resp->opcnt;
2413 while (opiter < argp->opcnt) {
2414 this = &argp->ops[opiter++];
2415 if (test_bit(this->opnum, allow->u.longs) &&
2416 cstate->clp->cl_mach_cred &&
2417 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2418 cstate->spo_must_allowed = true;
2419 return true;
2420 }
2421 }
2422 cstate->spo_must_allowed = false;
2423 return false;
2424}
2425
2426int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2427{
2428 struct nfsd4_operation *opdesc;
2429 nfsd4op_rsize estimator;
2430
2431 if (op->opnum == OP_ILLEGAL)
2432 return op_encode_hdr_size * sizeof(__be32);
2433 opdesc = OPDESC(op);
2434 estimator = opdesc->op_rsize_bop;
2435 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2436}
2437
2438void warn_on_nonidempotent_op(struct nfsd4_op *op)
2439{
2440 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2441 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2442 op->opnum, nfsd4_op_name(op->opnum));
2443 WARN_ON_ONCE(1);
2444 }
2445}
2446
2447static const char *nfsd4_op_name(unsigned opnum)
2448{
2449 if (opnum < ARRAY_SIZE(nfsd4_ops))
2450 return nfsd4_ops[opnum].op_name;
2451 return "unknown_operation";
2452}
2453
2454#define nfsd4_voidres nfsd4_voidargs
2455struct nfsd4_voidargs { int dummy; };
2456
2457static struct svc_procedure nfsd_procedures4[2] = {
2458 [NFSPROC4_NULL] = {
2459 .pc_func = (svc_procfunc) nfsd4_proc_null,
2460 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2461 .pc_argsize = sizeof(struct nfsd4_voidargs),
2462 .pc_ressize = sizeof(struct nfsd4_voidres),
2463 .pc_cachetype = RC_NOCACHE,
2464 .pc_xdrressize = 1,
2465 },
2466 [NFSPROC4_COMPOUND] = {
2467 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2468 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2469 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2470 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2471 .pc_ressize = sizeof(struct nfsd4_compoundres),
2472 .pc_release = nfsd4_release_compoundargs,
2473 .pc_cachetype = RC_NOCACHE,
2474 .pc_xdrressize = NFSD_BUFSIZE/4,
2475 },
2476};
2477
2478struct svc_version nfsd_version4 = {
2479 .vs_vers = 4,
2480 .vs_nproc = 2,
2481 .vs_proc = nfsd_procedures4,
2482 .vs_dispatch = nfsd_dispatch,
2483 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2484 .vs_rpcb_optnl = 1,
2485};
2486
2487/*
2488 * Local variables:
2489 * c-basic-offset: 8
2490 * End:
2491 */
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/fs_struct.h>
36#include <linux/file.h>
37#include <linux/falloc.h>
38#include <linux/slab.h>
39#include <linux/kthread.h>
40
41#include "idmap.h"
42#include "cache.h"
43#include "xdr4.h"
44#include "vfs.h"
45#include "current_stateid.h"
46#include "netns.h"
47#include "acl.h"
48#include "pnfs.h"
49#include "trace.h"
50
51#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52#include <linux/security.h>
53
54static inline void
55nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
56{
57 struct inode *inode = d_inode(resfh->fh_dentry);
58 int status;
59
60 inode_lock(inode);
61 status = security_inode_setsecctx(resfh->fh_dentry,
62 label->data, label->len);
63 inode_unlock(inode);
64
65 if (status)
66 /*
67 * XXX: We should really fail the whole open, but we may
68 * already have created a new file, so it may be too
69 * late. For now this seems the least of evils:
70 */
71 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
72
73 return;
74}
75#else
76static inline void
77nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
78{ }
79#endif
80
81#define NFSDDBG_FACILITY NFSDDBG_PROC
82
83static u32 nfsd_attrmask[] = {
84 NFSD_WRITEABLE_ATTRS_WORD0,
85 NFSD_WRITEABLE_ATTRS_WORD1,
86 NFSD_WRITEABLE_ATTRS_WORD2
87};
88
89static u32 nfsd41_ex_attrmask[] = {
90 NFSD_SUPPATTR_EXCLCREAT_WORD0,
91 NFSD_SUPPATTR_EXCLCREAT_WORD1,
92 NFSD_SUPPATTR_EXCLCREAT_WORD2
93};
94
95static __be32
96check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
97 u32 *bmval, u32 *writable)
98{
99 struct dentry *dentry = cstate->current_fh.fh_dentry;
100 struct svc_export *exp = cstate->current_fh.fh_export;
101
102 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
103 return nfserr_attrnotsupp;
104 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
105 return nfserr_attrnotsupp;
106 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
107 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
108 return nfserr_attrnotsupp;
109 if (writable && !bmval_is_subset(bmval, writable))
110 return nfserr_inval;
111 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
112 (bmval[1] & FATTR4_WORD1_MODE))
113 return nfserr_inval;
114 return nfs_ok;
115}
116
117static __be32
118nfsd4_check_open_attributes(struct svc_rqst *rqstp,
119 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
120{
121 __be32 status = nfs_ok;
122
123 if (open->op_create == NFS4_OPEN_CREATE) {
124 if (open->op_createmode == NFS4_CREATE_UNCHECKED
125 || open->op_createmode == NFS4_CREATE_GUARDED)
126 status = check_attr_support(rqstp, cstate,
127 open->op_bmval, nfsd_attrmask);
128 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
129 status = check_attr_support(rqstp, cstate,
130 open->op_bmval, nfsd41_ex_attrmask);
131 }
132
133 return status;
134}
135
136static int
137is_create_with_attrs(struct nfsd4_open *open)
138{
139 return open->op_create == NFS4_OPEN_CREATE
140 && (open->op_createmode == NFS4_CREATE_UNCHECKED
141 || open->op_createmode == NFS4_CREATE_GUARDED
142 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
143}
144
145/*
146 * if error occurs when setting the acl, just clear the acl bit
147 * in the returned attr bitmap.
148 */
149static void
150do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
151 struct nfs4_acl *acl, u32 *bmval)
152{
153 __be32 status;
154
155 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
156 if (status)
157 /*
158 * We should probably fail the whole open at this point,
159 * but we've already created the file, so it's too late;
160 * So this seems the least of evils:
161 */
162 bmval[0] &= ~FATTR4_WORD0_ACL;
163}
164
165static inline void
166fh_dup2(struct svc_fh *dst, struct svc_fh *src)
167{
168 fh_put(dst);
169 dget(src->fh_dentry);
170 if (src->fh_export)
171 exp_get(src->fh_export);
172 *dst = *src;
173}
174
175static __be32
176do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
177{
178 __be32 status;
179
180 if (open->op_truncate &&
181 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
182 return nfserr_inval;
183
184 accmode |= NFSD_MAY_READ_IF_EXEC;
185
186 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
187 accmode |= NFSD_MAY_READ;
188 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
189 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
190 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
191 accmode |= NFSD_MAY_WRITE;
192
193 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
194
195 return status;
196}
197
198static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
199{
200 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
201
202 if (S_ISREG(mode))
203 return nfs_ok;
204 if (S_ISDIR(mode))
205 return nfserr_isdir;
206 /*
207 * Using err_symlink as our catch-all case may look odd; but
208 * there's no other obvious error for this case in 4.0, and we
209 * happen to know that it will cause the linux v4 client to do
210 * the right thing on attempts to open something other than a
211 * regular file.
212 */
213 return nfserr_symlink;
214}
215
216static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
217{
218 if (nfsd4_has_session(cstate))
219 return;
220 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
221 &resfh->fh_handle);
222}
223
224static __be32
225do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
226{
227 struct svc_fh *current_fh = &cstate->current_fh;
228 int accmode;
229 __be32 status;
230
231 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
232 if (!*resfh)
233 return nfserr_jukebox;
234 fh_init(*resfh, NFS4_FHSIZE);
235 open->op_truncate = 0;
236
237 if (open->op_create) {
238 /* FIXME: check session persistence and pnfs flags.
239 * The nfsv4.1 spec requires the following semantics:
240 *
241 * Persistent | pNFS | Server REQUIRED | Client Allowed
242 * Reply Cache | server | |
243 * -------------+--------+-----------------+--------------------
244 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
245 * | | | (SHOULD)
246 * | | and EXCLUSIVE4 | or EXCLUSIVE4
247 * | | | (SHOULD NOT)
248 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
249 * yes | no | GUARDED4 | GUARDED4
250 * yes | yes | GUARDED4 | GUARDED4
251 */
252
253 /*
254 * Note: create modes (UNCHECKED,GUARDED...) are the same
255 * in NFSv4 as in v3 except EXCLUSIVE4_1.
256 */
257 current->fs->umask = open->op_umask;
258 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
259 open->op_fname.len, &open->op_iattr,
260 *resfh, open->op_createmode,
261 (u32 *)open->op_verf.data,
262 &open->op_truncate, &open->op_created);
263 current->fs->umask = 0;
264
265 if (!status && open->op_label.len)
266 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
267
268 /*
269 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
270 * use the returned bitmask to indicate which attributes
271 * we used to store the verifier:
272 */
273 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
274 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
275 FATTR4_WORD1_TIME_MODIFY);
276 } else
277 /*
278 * Note this may exit with the parent still locked.
279 * We will hold the lock until nfsd4_open's final
280 * lookup, to prevent renames or unlinks until we've had
281 * a chance to an acquire a delegation if appropriate.
282 */
283 status = nfsd_lookup(rqstp, current_fh,
284 open->op_fname.data, open->op_fname.len, *resfh);
285 if (status)
286 goto out;
287 status = nfsd_check_obj_isreg(*resfh);
288 if (status)
289 goto out;
290
291 if (is_create_with_attrs(open) && open->op_acl != NULL)
292 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
293
294 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
295 accmode = NFSD_MAY_NOP;
296 if (open->op_created ||
297 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
298 accmode |= NFSD_MAY_OWNER_OVERRIDE;
299 status = do_open_permission(rqstp, *resfh, open, accmode);
300 set_change_info(&open->op_cinfo, current_fh);
301out:
302 return status;
303}
304
305static __be32
306do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
307{
308 struct svc_fh *current_fh = &cstate->current_fh;
309 __be32 status;
310 int accmode = 0;
311
312 /* We don't know the target directory, and therefore can not
313 * set the change info
314 */
315
316 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
317
318 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
319
320 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
321 (open->op_iattr.ia_size == 0);
322 /*
323 * In the delegation case, the client is telling us about an
324 * open that it *already* performed locally, some time ago. We
325 * should let it succeed now if possible.
326 *
327 * In the case of a CLAIM_FH open, on the other hand, the client
328 * may be counting on us to enforce permissions (the Linux 4.1
329 * client uses this for normal opens, for example).
330 */
331 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
332 accmode = NFSD_MAY_OWNER_OVERRIDE;
333
334 status = do_open_permission(rqstp, current_fh, open, accmode);
335
336 return status;
337}
338
339static void
340copy_clientid(clientid_t *clid, struct nfsd4_session *session)
341{
342 struct nfsd4_sessionid *sid =
343 (struct nfsd4_sessionid *)session->se_sessionid.data;
344
345 clid->cl_boot = sid->clientid.cl_boot;
346 clid->cl_id = sid->clientid.cl_id;
347}
348
349static __be32
350nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
351 union nfsd4_op_u *u)
352{
353 struct nfsd4_open *open = &u->open;
354 __be32 status;
355 struct svc_fh *resfh = NULL;
356 struct net *net = SVC_NET(rqstp);
357 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
358 bool reclaim = false;
359
360 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
361 (int)open->op_fname.len, open->op_fname.data,
362 open->op_openowner);
363
364 /* This check required by spec. */
365 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
366 return nfserr_inval;
367
368 open->op_created = 0;
369 /*
370 * RFC5661 18.51.3
371 * Before RECLAIM_COMPLETE done, server should deny new lock
372 */
373 if (nfsd4_has_session(cstate) &&
374 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
375 &cstate->session->se_client->cl_flags) &&
376 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
377 return nfserr_grace;
378
379 if (nfsd4_has_session(cstate))
380 copy_clientid(&open->op_clientid, cstate->session);
381
382 /* check seqid for replay. set nfs4_owner */
383 status = nfsd4_process_open1(cstate, open, nn);
384 if (status == nfserr_replay_me) {
385 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
386 fh_put(&cstate->current_fh);
387 fh_copy_shallow(&cstate->current_fh.fh_handle,
388 &rp->rp_openfh);
389 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
390 if (status)
391 dprintk("nfsd4_open: replay failed"
392 " restoring previous filehandle\n");
393 else
394 status = nfserr_replay_me;
395 }
396 if (status)
397 goto out;
398 if (open->op_xdr_error) {
399 status = open->op_xdr_error;
400 goto out;
401 }
402
403 status = nfsd4_check_open_attributes(rqstp, cstate, open);
404 if (status)
405 goto out;
406
407 /* Openowner is now set, so sequence id will get bumped. Now we need
408 * these checks before we do any creates: */
409 status = nfserr_grace;
410 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
411 goto out;
412 status = nfserr_no_grace;
413 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
414 goto out;
415
416 switch (open->op_claim_type) {
417 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
418 case NFS4_OPEN_CLAIM_NULL:
419 status = do_open_lookup(rqstp, cstate, open, &resfh);
420 if (status)
421 goto out;
422 break;
423 case NFS4_OPEN_CLAIM_PREVIOUS:
424 status = nfs4_check_open_reclaim(&open->op_clientid,
425 cstate, nn);
426 if (status)
427 goto out;
428 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
429 reclaim = true;
430 /* fall through */
431 case NFS4_OPEN_CLAIM_FH:
432 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
433 status = do_open_fhandle(rqstp, cstate, open);
434 if (status)
435 goto out;
436 resfh = &cstate->current_fh;
437 break;
438 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
439 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
440 dprintk("NFSD: unsupported OPEN claim type %d\n",
441 open->op_claim_type);
442 status = nfserr_notsupp;
443 goto out;
444 default:
445 dprintk("NFSD: Invalid OPEN claim type %d\n",
446 open->op_claim_type);
447 status = nfserr_inval;
448 goto out;
449 }
450 /*
451 * nfsd4_process_open2() does the actual opening of the file. If
452 * successful, it (1) truncates the file if open->op_truncate was
453 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
454 */
455 status = nfsd4_process_open2(rqstp, resfh, open);
456 WARN(status && open->op_created,
457 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
458 be32_to_cpu(status));
459 if (reclaim && !status)
460 nn->somebody_reclaimed = true;
461out:
462 if (resfh && resfh != &cstate->current_fh) {
463 fh_dup2(&cstate->current_fh, resfh);
464 fh_put(resfh);
465 kfree(resfh);
466 }
467 nfsd4_cleanup_open_state(cstate, open);
468 nfsd4_bump_seqid(cstate, status);
469 return status;
470}
471
472/*
473 * OPEN is the only seqid-mutating operation whose decoding can fail
474 * with a seqid-mutating error (specifically, decoding of user names in
475 * the attributes). Therefore we have to do some processing to look up
476 * the stateowner so that we can bump the seqid.
477 */
478static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
479{
480 struct nfsd4_open *open = &op->u.open;
481
482 if (!seqid_mutating_err(ntohl(op->status)))
483 return op->status;
484 if (nfsd4_has_session(cstate))
485 return op->status;
486 open->op_xdr_error = op->status;
487 return nfsd4_open(rqstp, cstate, &op->u);
488}
489
490/*
491 * filehandle-manipulating ops.
492 */
493static __be32
494nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
495 union nfsd4_op_u *u)
496{
497 u->getfh = &cstate->current_fh;
498 return nfs_ok;
499}
500
501static __be32
502nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 union nfsd4_op_u *u)
504{
505 struct nfsd4_putfh *putfh = &u->putfh;
506
507 fh_put(&cstate->current_fh);
508 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
509 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
510 putfh->pf_fhlen);
511 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
512}
513
514static __be32
515nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
516 union nfsd4_op_u *u)
517{
518 __be32 status;
519
520 fh_put(&cstate->current_fh);
521 status = exp_pseudoroot(rqstp, &cstate->current_fh);
522 return status;
523}
524
525static __be32
526nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
527 union nfsd4_op_u *u)
528{
529 if (!cstate->save_fh.fh_dentry)
530 return nfserr_restorefh;
531
532 fh_dup2(&cstate->current_fh, &cstate->save_fh);
533 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
534 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
535 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
536 }
537 return nfs_ok;
538}
539
540static __be32
541nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
542 union nfsd4_op_u *u)
543{
544 fh_dup2(&cstate->save_fh, &cstate->current_fh);
545 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
546 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
547 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
548 }
549 return nfs_ok;
550}
551
552/*
553 * misc nfsv4 ops
554 */
555static __be32
556nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
557 union nfsd4_op_u *u)
558{
559 struct nfsd4_access *access = &u->access;
560
561 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
562 return nfserr_inval;
563
564 access->ac_resp_access = access->ac_req_access;
565 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
566 &access->ac_supported);
567}
568
569static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
570{
571 __be32 *verf = (__be32 *)verifier->data;
572
573 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
574
575 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
576}
577
578static __be32
579nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
580 union nfsd4_op_u *u)
581{
582 struct nfsd4_commit *commit = &u->commit;
583
584 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
585 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
586 commit->co_count);
587}
588
589static __be32
590nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
591 union nfsd4_op_u *u)
592{
593 struct nfsd4_create *create = &u->create;
594 struct svc_fh resfh;
595 __be32 status;
596 dev_t rdev;
597
598 fh_init(&resfh, NFS4_FHSIZE);
599
600 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
601 if (status)
602 return status;
603
604 status = check_attr_support(rqstp, cstate, create->cr_bmval,
605 nfsd_attrmask);
606 if (status)
607 return status;
608
609 current->fs->umask = create->cr_umask;
610 switch (create->cr_type) {
611 case NF4LNK:
612 status = nfsd_symlink(rqstp, &cstate->current_fh,
613 create->cr_name, create->cr_namelen,
614 create->cr_data, &resfh);
615 break;
616
617 case NF4BLK:
618 status = nfserr_inval;
619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
620 if (MAJOR(rdev) != create->cr_specdata1 ||
621 MINOR(rdev) != create->cr_specdata2)
622 goto out_umask;
623 status = nfsd_create(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 &create->cr_iattr, S_IFBLK, rdev, &resfh);
626 break;
627
628 case NF4CHR:
629 status = nfserr_inval;
630 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
631 if (MAJOR(rdev) != create->cr_specdata1 ||
632 MINOR(rdev) != create->cr_specdata2)
633 goto out_umask;
634 status = nfsd_create(rqstp, &cstate->current_fh,
635 create->cr_name, create->cr_namelen,
636 &create->cr_iattr,S_IFCHR, rdev, &resfh);
637 break;
638
639 case NF4SOCK:
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFSOCK, 0, &resfh);
643 break;
644
645 case NF4FIFO:
646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFIFO, 0, &resfh);
649 break;
650
651 case NF4DIR:
652 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
653 status = nfsd_create(rqstp, &cstate->current_fh,
654 create->cr_name, create->cr_namelen,
655 &create->cr_iattr, S_IFDIR, 0, &resfh);
656 break;
657
658 default:
659 status = nfserr_badtype;
660 }
661
662 if (status)
663 goto out;
664
665 if (create->cr_label.len)
666 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
667
668 if (create->cr_acl != NULL)
669 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
670 create->cr_bmval);
671
672 fh_unlock(&cstate->current_fh);
673 set_change_info(&create->cr_cinfo, &cstate->current_fh);
674 fh_dup2(&cstate->current_fh, &resfh);
675out:
676 fh_put(&resfh);
677out_umask:
678 current->fs->umask = 0;
679 return status;
680}
681
682static __be32
683nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
684 union nfsd4_op_u *u)
685{
686 struct nfsd4_getattr *getattr = &u->getattr;
687 __be32 status;
688
689 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
690 if (status)
691 return status;
692
693 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
694 return nfserr_inval;
695
696 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
697 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
698 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
699
700 getattr->ga_fhp = &cstate->current_fh;
701 return nfs_ok;
702}
703
704static __be32
705nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
706 union nfsd4_op_u *u)
707{
708 struct nfsd4_link *link = &u->link;
709 __be32 status;
710
711 status = nfsd_link(rqstp, &cstate->current_fh,
712 link->li_name, link->li_namelen, &cstate->save_fh);
713 if (!status)
714 set_change_info(&link->li_cinfo, &cstate->current_fh);
715 return status;
716}
717
718static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
719{
720 struct svc_fh tmp_fh;
721 __be32 ret;
722
723 fh_init(&tmp_fh, NFS4_FHSIZE);
724 ret = exp_pseudoroot(rqstp, &tmp_fh);
725 if (ret)
726 return ret;
727 if (tmp_fh.fh_dentry == fh->fh_dentry) {
728 fh_put(&tmp_fh);
729 return nfserr_noent;
730 }
731 fh_put(&tmp_fh);
732 return nfsd_lookup(rqstp, fh, "..", 2, fh);
733}
734
735static __be32
736nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
737 union nfsd4_op_u *u)
738{
739 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
740}
741
742static __be32
743nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
744 union nfsd4_op_u *u)
745{
746 return nfsd_lookup(rqstp, &cstate->current_fh,
747 u->lookup.lo_name, u->lookup.lo_len,
748 &cstate->current_fh);
749}
750
751static __be32
752nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
753 union nfsd4_op_u *u)
754{
755 struct nfsd4_read *read = &u->read;
756 __be32 status;
757
758 read->rd_nf = NULL;
759 if (read->rd_offset >= OFFSET_MAX)
760 return nfserr_inval;
761
762 trace_nfsd_read_start(rqstp, &cstate->current_fh,
763 read->rd_offset, read->rd_length);
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_nf);
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
791
792static void
793nfsd4_read_release(union nfsd4_op_u *u)
794{
795 if (u->read.rd_nf)
796 nfsd_file_put(u->read.rd_nf);
797 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
798 u->read.rd_offset, u->read.rd_length);
799}
800
801static __be32
802nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
803 union nfsd4_op_u *u)
804{
805 struct nfsd4_readdir *readdir = &u->readdir;
806 u64 cookie = readdir->rd_cookie;
807 static const nfs4_verifier zeroverf;
808
809 /* no need to check permission - this will be done in nfsd_readdir() */
810
811 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
812 return nfserr_inval;
813
814 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
815 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
816 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
817
818 if ((cookie == 1) || (cookie == 2) ||
819 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
820 return nfserr_bad_cookie;
821
822 readdir->rd_rqstp = rqstp;
823 readdir->rd_fhp = &cstate->current_fh;
824 return nfs_ok;
825}
826
827static __be32
828nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
829 union nfsd4_op_u *u)
830{
831 u->readlink.rl_rqstp = rqstp;
832 u->readlink.rl_fhp = &cstate->current_fh;
833 return nfs_ok;
834}
835
836static __be32
837nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
838 union nfsd4_op_u *u)
839{
840 struct nfsd4_remove *remove = &u->remove;
841 __be32 status;
842
843 if (opens_in_grace(SVC_NET(rqstp)))
844 return nfserr_grace;
845 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
846 remove->rm_name, remove->rm_namelen);
847 if (!status) {
848 fh_unlock(&cstate->current_fh);
849 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
850 }
851 return status;
852}
853
854static __be32
855nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
856 union nfsd4_op_u *u)
857{
858 struct nfsd4_rename *rename = &u->rename;
859 __be32 status;
860
861 if (opens_in_grace(SVC_NET(rqstp)))
862 return nfserr_grace;
863 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
864 rename->rn_snamelen, &cstate->current_fh,
865 rename->rn_tname, rename->rn_tnamelen);
866 if (status)
867 return status;
868 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
869 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
870 return nfs_ok;
871}
872
873static __be32
874nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
875 union nfsd4_op_u *u)
876{
877 struct nfsd4_secinfo *secinfo = &u->secinfo;
878 struct svc_export *exp;
879 struct dentry *dentry;
880 __be32 err;
881
882 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
883 if (err)
884 return err;
885 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
886 secinfo->si_name, secinfo->si_namelen,
887 &exp, &dentry);
888 if (err)
889 return err;
890 fh_unlock(&cstate->current_fh);
891 if (d_really_is_negative(dentry)) {
892 exp_put(exp);
893 err = nfserr_noent;
894 } else
895 secinfo->si_exp = exp;
896 dput(dentry);
897 if (cstate->minorversion)
898 /* See rfc 5661 section 2.6.3.1.1.8 */
899 fh_put(&cstate->current_fh);
900 return err;
901}
902
903static __be32
904nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
905 union nfsd4_op_u *u)
906{
907 __be32 err;
908
909 switch (u->secinfo_no_name.sin_style) {
910 case NFS4_SECINFO_STYLE4_CURRENT_FH:
911 break;
912 case NFS4_SECINFO_STYLE4_PARENT:
913 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
914 if (err)
915 return err;
916 break;
917 default:
918 return nfserr_inval;
919 }
920
921 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
922 fh_put(&cstate->current_fh);
923 return nfs_ok;
924}
925
926static void
927nfsd4_secinfo_release(union nfsd4_op_u *u)
928{
929 if (u->secinfo.si_exp)
930 exp_put(u->secinfo.si_exp);
931}
932
933static void
934nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
935{
936 if (u->secinfo_no_name.sin_exp)
937 exp_put(u->secinfo_no_name.sin_exp);
938}
939
940static __be32
941nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
942 union nfsd4_op_u *u)
943{
944 struct nfsd4_setattr *setattr = &u->setattr;
945 __be32 status = nfs_ok;
946 int err;
947
948 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
949 status = nfs4_preprocess_stateid_op(rqstp, cstate,
950 &cstate->current_fh, &setattr->sa_stateid,
951 WR_STATE, NULL);
952 if (status) {
953 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
954 return status;
955 }
956 }
957 err = fh_want_write(&cstate->current_fh);
958 if (err)
959 return nfserrno(err);
960 status = nfs_ok;
961
962 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
963 nfsd_attrmask);
964 if (status)
965 goto out;
966
967 if (setattr->sa_acl != NULL)
968 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
969 setattr->sa_acl);
970 if (status)
971 goto out;
972 if (setattr->sa_label.len)
973 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
974 &setattr->sa_label);
975 if (status)
976 goto out;
977 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
978 0, (time_t)0);
979out:
980 fh_drop_write(&cstate->current_fh);
981 return status;
982}
983
984static __be32
985nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
986 union nfsd4_op_u *u)
987{
988 struct nfsd4_write *write = &u->write;
989 stateid_t *stateid = &write->wr_stateid;
990 struct nfsd_file *nf = NULL;
991 __be32 status = nfs_ok;
992 unsigned long cnt;
993 int nvecs;
994
995 if (write->wr_offset >= OFFSET_MAX)
996 return nfserr_inval;
997
998 cnt = write->wr_buflen;
999 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1000 write->wr_offset, cnt);
1001 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1002 stateid, WR_STATE, &nf);
1003 if (status) {
1004 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1005 return status;
1006 }
1007
1008 write->wr_how_written = write->wr_stable_how;
1009 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1010
1011 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1012 &write->wr_head, write->wr_buflen);
1013 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1014
1015 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf->nf_file,
1016 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1017 write->wr_how_written);
1018 nfsd_file_put(nf);
1019
1020 write->wr_bytes_written = cnt;
1021 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1022 write->wr_offset, cnt);
1023 return status;
1024}
1025
1026static __be32
1027nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1028 stateid_t *src_stateid, struct nfsd_file **src,
1029 stateid_t *dst_stateid, struct nfsd_file **dst)
1030{
1031 __be32 status;
1032
1033 if (!cstate->save_fh.fh_dentry)
1034 return nfserr_nofilehandle;
1035
1036 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1037 src_stateid, RD_STATE, src);
1038 if (status) {
1039 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1040 goto out;
1041 }
1042
1043 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1044 dst_stateid, WR_STATE, dst);
1045 if (status) {
1046 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1047 goto out_put_src;
1048 }
1049
1050 /* fix up for NFS-specific error code */
1051 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1052 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1053 status = nfserr_wrong_type;
1054 goto out_put_dst;
1055 }
1056
1057out:
1058 return status;
1059out_put_dst:
1060 nfsd_file_put(*dst);
1061out_put_src:
1062 nfsd_file_put(*src);
1063 goto out;
1064}
1065
1066static __be32
1067nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1068 union nfsd4_op_u *u)
1069{
1070 struct nfsd4_clone *clone = &u->clone;
1071 struct nfsd_file *src, *dst;
1072 __be32 status;
1073
1074 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1075 &clone->cl_dst_stateid, &dst);
1076 if (status)
1077 goto out;
1078
1079 status = nfsd4_clone_file_range(src->nf_file, clone->cl_src_pos,
1080 dst->nf_file, clone->cl_dst_pos, clone->cl_count);
1081
1082 nfsd_file_put(dst);
1083 nfsd_file_put(src);
1084out:
1085 return status;
1086}
1087
1088void nfs4_put_copy(struct nfsd4_copy *copy)
1089{
1090 if (!refcount_dec_and_test(©->refcount))
1091 return;
1092 kfree(copy);
1093}
1094
1095static bool
1096check_and_set_stop_copy(struct nfsd4_copy *copy)
1097{
1098 bool value;
1099
1100 spin_lock(©->cp_clp->async_lock);
1101 value = copy->stopped;
1102 if (!copy->stopped)
1103 copy->stopped = true;
1104 spin_unlock(©->cp_clp->async_lock);
1105 return value;
1106}
1107
1108static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1109{
1110 /* only 1 thread should stop the copy */
1111 if (!check_and_set_stop_copy(copy))
1112 kthread_stop(copy->copy_task);
1113 nfs4_put_copy(copy);
1114}
1115
1116static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1117{
1118 struct nfsd4_copy *copy = NULL;
1119
1120 spin_lock(&clp->async_lock);
1121 if (!list_empty(&clp->async_copies)) {
1122 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1123 copies);
1124 refcount_inc(©->refcount);
1125 }
1126 spin_unlock(&clp->async_lock);
1127 return copy;
1128}
1129
1130void nfsd4_shutdown_copy(struct nfs4_client *clp)
1131{
1132 struct nfsd4_copy *copy;
1133
1134 while ((copy = nfsd4_get_copy(clp)) != NULL)
1135 nfsd4_stop_copy(copy);
1136}
1137
1138static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1139{
1140 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1141
1142 nfs4_put_copy(copy);
1143}
1144
1145static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1146 struct rpc_task *task)
1147{
1148 return 1;
1149}
1150
1151static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1152 .release = nfsd4_cb_offload_release,
1153 .done = nfsd4_cb_offload_done
1154};
1155
1156static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1157{
1158 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1159 copy->cp_synchronous = sync;
1160 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1161}
1162
1163static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1164{
1165 ssize_t bytes_copied = 0;
1166 size_t bytes_total = copy->cp_count;
1167 u64 src_pos = copy->cp_src_pos;
1168 u64 dst_pos = copy->cp_dst_pos;
1169
1170 do {
1171 if (kthread_should_stop())
1172 break;
1173 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1174 src_pos, copy->nf_dst->nf_file, dst_pos,
1175 bytes_total);
1176 if (bytes_copied <= 0)
1177 break;
1178 bytes_total -= bytes_copied;
1179 copy->cp_res.wr_bytes_written += bytes_copied;
1180 src_pos += bytes_copied;
1181 dst_pos += bytes_copied;
1182 } while (bytes_total > 0 && !copy->cp_synchronous);
1183 return bytes_copied;
1184}
1185
1186static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1187{
1188 __be32 status;
1189 ssize_t bytes;
1190
1191 bytes = _nfsd_copy_file_range(copy);
1192 /* for async copy, we ignore the error, client can always retry
1193 * to get the error
1194 */
1195 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1196 status = nfserrno(bytes);
1197 else {
1198 nfsd4_init_copy_res(copy, sync);
1199 status = nfs_ok;
1200 }
1201
1202 nfsd_file_put(copy->nf_src);
1203 nfsd_file_put(copy->nf_dst);
1204 return status;
1205}
1206
1207static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1208{
1209 dst->cp_src_pos = src->cp_src_pos;
1210 dst->cp_dst_pos = src->cp_dst_pos;
1211 dst->cp_count = src->cp_count;
1212 dst->cp_synchronous = src->cp_synchronous;
1213 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1214 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1215 dst->cp_clp = src->cp_clp;
1216 dst->nf_dst = nfsd_file_get(src->nf_dst);
1217 dst->nf_src = nfsd_file_get(src->nf_src);
1218 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1219}
1220
1221static void cleanup_async_copy(struct nfsd4_copy *copy)
1222{
1223 nfs4_free_cp_state(copy);
1224 nfsd_file_put(copy->nf_dst);
1225 nfsd_file_put(copy->nf_src);
1226 spin_lock(©->cp_clp->async_lock);
1227 list_del(©->copies);
1228 spin_unlock(©->cp_clp->async_lock);
1229 nfs4_put_copy(copy);
1230}
1231
1232static int nfsd4_do_async_copy(void *data)
1233{
1234 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1235 struct nfsd4_copy *cb_copy;
1236
1237 copy->nfserr = nfsd4_do_copy(copy, 0);
1238 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1239 if (!cb_copy)
1240 goto out;
1241 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1242 cb_copy->cp_clp = copy->cp_clp;
1243 cb_copy->nfserr = copy->nfserr;
1244 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1245 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1246 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1247 nfsd4_run_cb(&cb_copy->cp_cb);
1248out:
1249 cleanup_async_copy(copy);
1250 return 0;
1251}
1252
1253static __be32
1254nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1255 union nfsd4_op_u *u)
1256{
1257 struct nfsd4_copy *copy = &u->copy;
1258 __be32 status;
1259 struct nfsd4_copy *async_copy = NULL;
1260
1261 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1262 ©->nf_src, ©->cp_dst_stateid,
1263 ©->nf_dst);
1264 if (status)
1265 goto out;
1266
1267 copy->cp_clp = cstate->clp;
1268 memcpy(©->fh, &cstate->current_fh.fh_handle,
1269 sizeof(struct knfsd_fh));
1270 if (!copy->cp_synchronous) {
1271 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1272
1273 status = nfserrno(-ENOMEM);
1274 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1275 if (!async_copy)
1276 goto out;
1277 if (!nfs4_init_cp_state(nn, copy)) {
1278 kfree(async_copy);
1279 goto out;
1280 }
1281 refcount_set(&async_copy->refcount, 1);
1282 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1283 sizeof(copy->cp_stateid));
1284 dup_copy_fields(copy, async_copy);
1285 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1286 async_copy, "%s", "copy thread");
1287 if (IS_ERR(async_copy->copy_task))
1288 goto out_err;
1289 spin_lock(&async_copy->cp_clp->async_lock);
1290 list_add(&async_copy->copies,
1291 &async_copy->cp_clp->async_copies);
1292 spin_unlock(&async_copy->cp_clp->async_lock);
1293 wake_up_process(async_copy->copy_task);
1294 status = nfs_ok;
1295 } else
1296 status = nfsd4_do_copy(copy, 1);
1297out:
1298 return status;
1299out_err:
1300 cleanup_async_copy(async_copy);
1301 goto out;
1302}
1303
1304struct nfsd4_copy *
1305find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1306{
1307 struct nfsd4_copy *copy;
1308
1309 spin_lock(&clp->async_lock);
1310 list_for_each_entry(copy, &clp->async_copies, copies) {
1311 if (memcmp(©->cp_stateid, stateid, NFS4_STATEID_SIZE))
1312 continue;
1313 refcount_inc(©->refcount);
1314 spin_unlock(&clp->async_lock);
1315 return copy;
1316 }
1317 spin_unlock(&clp->async_lock);
1318 return NULL;
1319}
1320
1321static __be32
1322nfsd4_offload_cancel(struct svc_rqst *rqstp,
1323 struct nfsd4_compound_state *cstate,
1324 union nfsd4_op_u *u)
1325{
1326 struct nfsd4_offload_status *os = &u->offload_status;
1327 __be32 status = 0;
1328 struct nfsd4_copy *copy;
1329 struct nfs4_client *clp = cstate->clp;
1330
1331 copy = find_async_copy(clp, &os->stateid);
1332 if (copy)
1333 nfsd4_stop_copy(copy);
1334 else
1335 status = nfserr_bad_stateid;
1336
1337 return status;
1338}
1339
1340static __be32
1341nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1342 struct nfsd4_fallocate *fallocate, int flags)
1343{
1344 __be32 status;
1345 struct nfsd_file *nf;
1346
1347 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1348 &fallocate->falloc_stateid,
1349 WR_STATE, &nf);
1350 if (status != nfs_ok) {
1351 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1352 return status;
1353 }
1354
1355 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1356 fallocate->falloc_offset,
1357 fallocate->falloc_length,
1358 flags);
1359 nfsd_file_put(nf);
1360 return status;
1361}
1362static __be32
1363nfsd4_offload_status(struct svc_rqst *rqstp,
1364 struct nfsd4_compound_state *cstate,
1365 union nfsd4_op_u *u)
1366{
1367 struct nfsd4_offload_status *os = &u->offload_status;
1368 __be32 status = 0;
1369 struct nfsd4_copy *copy;
1370 struct nfs4_client *clp = cstate->clp;
1371
1372 copy = find_async_copy(clp, &os->stateid);
1373 if (copy) {
1374 os->count = copy->cp_res.wr_bytes_written;
1375 nfs4_put_copy(copy);
1376 } else
1377 status = nfserr_bad_stateid;
1378
1379 return status;
1380}
1381
1382static __be32
1383nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1384 union nfsd4_op_u *u)
1385{
1386 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1387}
1388
1389static __be32
1390nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1391 union nfsd4_op_u *u)
1392{
1393 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1394 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1395}
1396
1397static __be32
1398nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1399 union nfsd4_op_u *u)
1400{
1401 struct nfsd4_seek *seek = &u->seek;
1402 int whence;
1403 __be32 status;
1404 struct nfsd_file *nf;
1405
1406 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1407 &seek->seek_stateid,
1408 RD_STATE, &nf);
1409 if (status) {
1410 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1411 return status;
1412 }
1413
1414 switch (seek->seek_whence) {
1415 case NFS4_CONTENT_DATA:
1416 whence = SEEK_DATA;
1417 break;
1418 case NFS4_CONTENT_HOLE:
1419 whence = SEEK_HOLE;
1420 break;
1421 default:
1422 status = nfserr_union_notsupp;
1423 goto out;
1424 }
1425
1426 /*
1427 * Note: This call does change file->f_pos, but nothing in NFSD
1428 * should ever file->f_pos.
1429 */
1430 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1431 if (seek->seek_pos < 0)
1432 status = nfserrno(seek->seek_pos);
1433 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1434 seek->seek_eof = true;
1435
1436out:
1437 nfsd_file_put(nf);
1438 return status;
1439}
1440
1441/* This routine never returns NFS_OK! If there are no other errors, it
1442 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1443 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1444 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1445 */
1446static __be32
1447_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1448 struct nfsd4_verify *verify)
1449{
1450 __be32 *buf, *p;
1451 int count;
1452 __be32 status;
1453
1454 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1455 if (status)
1456 return status;
1457
1458 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1459 if (status)
1460 return status;
1461
1462 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1463 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1464 return nfserr_inval;
1465 if (verify->ve_attrlen & 3)
1466 return nfserr_inval;
1467
1468 /* count in words:
1469 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1470 */
1471 count = 4 + (verify->ve_attrlen >> 2);
1472 buf = kmalloc(count << 2, GFP_KERNEL);
1473 if (!buf)
1474 return nfserr_jukebox;
1475
1476 p = buf;
1477 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1478 cstate->current_fh.fh_export,
1479 cstate->current_fh.fh_dentry,
1480 verify->ve_bmval,
1481 rqstp, 0);
1482 /*
1483 * If nfsd4_encode_fattr() ran out of space, assume that's because
1484 * the attributes are longer (hence different) than those given:
1485 */
1486 if (status == nfserr_resource)
1487 status = nfserr_not_same;
1488 if (status)
1489 goto out_kfree;
1490
1491 /* skip bitmap */
1492 p = buf + 1 + ntohl(buf[0]);
1493 status = nfserr_not_same;
1494 if (ntohl(*p++) != verify->ve_attrlen)
1495 goto out_kfree;
1496 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1497 status = nfserr_same;
1498
1499out_kfree:
1500 kfree(buf);
1501 return status;
1502}
1503
1504static __be32
1505nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1506 union nfsd4_op_u *u)
1507{
1508 __be32 status;
1509
1510 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1511 return status == nfserr_not_same ? nfs_ok : status;
1512}
1513
1514static __be32
1515nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1516 union nfsd4_op_u *u)
1517{
1518 __be32 status;
1519
1520 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1521 return status == nfserr_same ? nfs_ok : status;
1522}
1523
1524#ifdef CONFIG_NFSD_PNFS
1525static const struct nfsd4_layout_ops *
1526nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1527{
1528 if (!exp->ex_layout_types) {
1529 dprintk("%s: export does not support pNFS\n", __func__);
1530 return NULL;
1531 }
1532
1533 if (layout_type >= LAYOUT_TYPE_MAX ||
1534 !(exp->ex_layout_types & (1 << layout_type))) {
1535 dprintk("%s: layout type %d not supported\n",
1536 __func__, layout_type);
1537 return NULL;
1538 }
1539
1540 return nfsd4_layout_ops[layout_type];
1541}
1542
1543static __be32
1544nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1545 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1546{
1547 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1548 const struct nfsd4_layout_ops *ops;
1549 struct nfsd4_deviceid_map *map;
1550 struct svc_export *exp;
1551 __be32 nfserr;
1552
1553 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1554 __func__,
1555 gdp->gd_layout_type,
1556 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1557 gdp->gd_maxcount);
1558
1559 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1560 if (!map) {
1561 dprintk("%s: couldn't find device ID to export mapping!\n",
1562 __func__);
1563 return nfserr_noent;
1564 }
1565
1566 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1567 if (IS_ERR(exp)) {
1568 dprintk("%s: could not find device id\n", __func__);
1569 return nfserr_noent;
1570 }
1571
1572 nfserr = nfserr_layoutunavailable;
1573 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1574 if (!ops)
1575 goto out;
1576
1577 nfserr = nfs_ok;
1578 if (gdp->gd_maxcount != 0) {
1579 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1580 rqstp, cstate->session->se_client, gdp);
1581 }
1582
1583 gdp->gd_notify_types &= ops->notify_types;
1584out:
1585 exp_put(exp);
1586 return nfserr;
1587}
1588
1589static void
1590nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1591{
1592 kfree(u->getdeviceinfo.gd_device);
1593}
1594
1595static __be32
1596nfsd4_layoutget(struct svc_rqst *rqstp,
1597 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1598{
1599 struct nfsd4_layoutget *lgp = &u->layoutget;
1600 struct svc_fh *current_fh = &cstate->current_fh;
1601 const struct nfsd4_layout_ops *ops;
1602 struct nfs4_layout_stateid *ls;
1603 __be32 nfserr;
1604 int accmode = NFSD_MAY_READ_IF_EXEC;
1605
1606 switch (lgp->lg_seg.iomode) {
1607 case IOMODE_READ:
1608 accmode |= NFSD_MAY_READ;
1609 break;
1610 case IOMODE_RW:
1611 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1612 break;
1613 default:
1614 dprintk("%s: invalid iomode %d\n",
1615 __func__, lgp->lg_seg.iomode);
1616 nfserr = nfserr_badiomode;
1617 goto out;
1618 }
1619
1620 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1621 if (nfserr)
1622 goto out;
1623
1624 nfserr = nfserr_layoutunavailable;
1625 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1626 if (!ops)
1627 goto out;
1628
1629 /*
1630 * Verify minlength and range as per RFC5661:
1631 * o If loga_length is less than loga_minlength,
1632 * the metadata server MUST return NFS4ERR_INVAL.
1633 * o If the sum of loga_offset and loga_minlength exceeds
1634 * NFS4_UINT64_MAX, and loga_minlength is not
1635 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1636 * o If the sum of loga_offset and loga_length exceeds
1637 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1638 * the error NFS4ERR_INVAL MUST result.
1639 */
1640 nfserr = nfserr_inval;
1641 if (lgp->lg_seg.length < lgp->lg_minlength ||
1642 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1643 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1644 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1645 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1646 goto out;
1647 if (lgp->lg_seg.length == 0)
1648 goto out;
1649
1650 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1651 true, lgp->lg_layout_type, &ls);
1652 if (nfserr) {
1653 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1654 goto out;
1655 }
1656
1657 nfserr = nfserr_recallconflict;
1658 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1659 goto out_put_stid;
1660
1661 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1662 current_fh, lgp);
1663 if (nfserr)
1664 goto out_put_stid;
1665
1666 nfserr = nfsd4_insert_layout(lgp, ls);
1667
1668out_put_stid:
1669 mutex_unlock(&ls->ls_mutex);
1670 nfs4_put_stid(&ls->ls_stid);
1671out:
1672 return nfserr;
1673}
1674
1675static void
1676nfsd4_layoutget_release(union nfsd4_op_u *u)
1677{
1678 kfree(u->layoutget.lg_content);
1679}
1680
1681static __be32
1682nfsd4_layoutcommit(struct svc_rqst *rqstp,
1683 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1684{
1685 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1686 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1687 struct svc_fh *current_fh = &cstate->current_fh;
1688 const struct nfsd4_layout_ops *ops;
1689 loff_t new_size = lcp->lc_last_wr + 1;
1690 struct inode *inode;
1691 struct nfs4_layout_stateid *ls;
1692 __be32 nfserr;
1693
1694 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1695 if (nfserr)
1696 goto out;
1697
1698 nfserr = nfserr_layoutunavailable;
1699 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1700 if (!ops)
1701 goto out;
1702 inode = d_inode(current_fh->fh_dentry);
1703
1704 nfserr = nfserr_inval;
1705 if (new_size <= seg->offset) {
1706 dprintk("pnfsd: last write before layout segment\n");
1707 goto out;
1708 }
1709 if (new_size > seg->offset + seg->length) {
1710 dprintk("pnfsd: last write beyond layout segment\n");
1711 goto out;
1712 }
1713 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1714 dprintk("pnfsd: layoutcommit beyond EOF\n");
1715 goto out;
1716 }
1717
1718 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1719 false, lcp->lc_layout_type,
1720 &ls);
1721 if (nfserr) {
1722 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
1723 /* fixup error code as per RFC5661 */
1724 if (nfserr == nfserr_bad_stateid)
1725 nfserr = nfserr_badlayout;
1726 goto out;
1727 }
1728
1729 /* LAYOUTCOMMIT does not require any serialization */
1730 mutex_unlock(&ls->ls_mutex);
1731
1732 if (new_size > i_size_read(inode)) {
1733 lcp->lc_size_chg = 1;
1734 lcp->lc_newsize = new_size;
1735 } else {
1736 lcp->lc_size_chg = 0;
1737 }
1738
1739 nfserr = ops->proc_layoutcommit(inode, lcp);
1740 nfs4_put_stid(&ls->ls_stid);
1741out:
1742 return nfserr;
1743}
1744
1745static __be32
1746nfsd4_layoutreturn(struct svc_rqst *rqstp,
1747 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1748{
1749 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1750 struct svc_fh *current_fh = &cstate->current_fh;
1751 __be32 nfserr;
1752
1753 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1754 if (nfserr)
1755 goto out;
1756
1757 nfserr = nfserr_layoutunavailable;
1758 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1759 goto out;
1760
1761 switch (lrp->lr_seg.iomode) {
1762 case IOMODE_READ:
1763 case IOMODE_RW:
1764 case IOMODE_ANY:
1765 break;
1766 default:
1767 dprintk("%s: invalid iomode %d\n", __func__,
1768 lrp->lr_seg.iomode);
1769 nfserr = nfserr_inval;
1770 goto out;
1771 }
1772
1773 switch (lrp->lr_return_type) {
1774 case RETURN_FILE:
1775 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1776 break;
1777 case RETURN_FSID:
1778 case RETURN_ALL:
1779 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1780 break;
1781 default:
1782 dprintk("%s: invalid return_type %d\n", __func__,
1783 lrp->lr_return_type);
1784 nfserr = nfserr_inval;
1785 break;
1786 }
1787out:
1788 return nfserr;
1789}
1790#endif /* CONFIG_NFSD_PNFS */
1791
1792/*
1793 * NULL call.
1794 */
1795static __be32
1796nfsd4_proc_null(struct svc_rqst *rqstp)
1797{
1798 return nfs_ok;
1799}
1800
1801static inline void nfsd4_increment_op_stats(u32 opnum)
1802{
1803 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1804 nfsdstats.nfs4_opcount[opnum]++;
1805}
1806
1807static const struct nfsd4_operation nfsd4_ops[];
1808
1809static const char *nfsd4_op_name(unsigned opnum);
1810
1811/*
1812 * Enforce NFSv4.1 COMPOUND ordering rules:
1813 *
1814 * Also note, enforced elsewhere:
1815 * - SEQUENCE other than as first op results in
1816 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1817 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1818 * (Enforced in nfsd4_bind_conn_to_session().)
1819 * - DESTROY_SESSION must be the final operation in a compound, if
1820 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1821 * (Enforced in nfsd4_destroy_session().)
1822 */
1823static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1824{
1825 struct nfsd4_op *first_op = &args->ops[0];
1826
1827 /* These ordering requirements don't apply to NFSv4.0: */
1828 if (args->minorversion == 0)
1829 return nfs_ok;
1830 /* This is weird, but OK, not our problem: */
1831 if (args->opcnt == 0)
1832 return nfs_ok;
1833 if (first_op->status == nfserr_op_illegal)
1834 return nfs_ok;
1835 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1836 return nfserr_op_not_in_session;
1837 if (first_op->opnum == OP_SEQUENCE)
1838 return nfs_ok;
1839 /*
1840 * So first_op is something allowed outside a session, like
1841 * EXCHANGE_ID; but then it has to be the only op in the
1842 * compound:
1843 */
1844 if (args->opcnt != 1)
1845 return nfserr_not_only_op;
1846 return nfs_ok;
1847}
1848
1849const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1850{
1851 return &nfsd4_ops[op->opnum];
1852}
1853
1854bool nfsd4_cache_this_op(struct nfsd4_op *op)
1855{
1856 if (op->opnum == OP_ILLEGAL)
1857 return false;
1858 return OPDESC(op)->op_flags & OP_CACHEME;
1859}
1860
1861static bool need_wrongsec_check(struct svc_rqst *rqstp)
1862{
1863 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1864 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1865 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1866 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1867 const struct nfsd4_operation *thisd = OPDESC(this);
1868 const struct nfsd4_operation *nextd;
1869
1870 /*
1871 * Most ops check wronsec on our own; only the putfh-like ops
1872 * have special rules.
1873 */
1874 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1875 return false;
1876 /*
1877 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1878 * put-filehandle operation if we're not going to use the
1879 * result:
1880 */
1881 if (argp->opcnt == resp->opcnt)
1882 return false;
1883 if (next->opnum == OP_ILLEGAL)
1884 return false;
1885 nextd = OPDESC(next);
1886 /*
1887 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1888 * errors themselves as necessary; others should check for them
1889 * now:
1890 */
1891 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1892}
1893
1894static void svcxdr_init_encode(struct svc_rqst *rqstp,
1895 struct nfsd4_compoundres *resp)
1896{
1897 struct xdr_stream *xdr = &resp->xdr;
1898 struct xdr_buf *buf = &rqstp->rq_res;
1899 struct kvec *head = buf->head;
1900
1901 xdr->buf = buf;
1902 xdr->iov = head;
1903 xdr->p = head->iov_base + head->iov_len;
1904 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1905 /* Tail and page_len should be zero at this point: */
1906 buf->len = buf->head[0].iov_len;
1907 xdr->scratch.iov_len = 0;
1908 xdr->page_ptr = buf->pages - 1;
1909 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1910 - rqstp->rq_auth_slack;
1911}
1912
1913/*
1914 * COMPOUND call.
1915 */
1916static __be32
1917nfsd4_proc_compound(struct svc_rqst *rqstp)
1918{
1919 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1920 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1921 struct nfsd4_op *op;
1922 struct nfsd4_compound_state *cstate = &resp->cstate;
1923 struct svc_fh *current_fh = &cstate->current_fh;
1924 struct svc_fh *save_fh = &cstate->save_fh;
1925 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1926 __be32 status;
1927
1928 svcxdr_init_encode(rqstp, resp);
1929 resp->tagp = resp->xdr.p;
1930 /* reserve space for: taglen, tag, and opcnt */
1931 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1932 resp->taglen = args->taglen;
1933 resp->tag = args->tag;
1934 resp->rqstp = rqstp;
1935 cstate->minorversion = args->minorversion;
1936 fh_init(current_fh, NFS4_FHSIZE);
1937 fh_init(save_fh, NFS4_FHSIZE);
1938 /*
1939 * Don't use the deferral mechanism for NFSv4; compounds make it
1940 * too hard to avoid non-idempotency problems.
1941 */
1942 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1943
1944 /*
1945 * According to RFC3010, this takes precedence over all other errors.
1946 */
1947 status = nfserr_minor_vers_mismatch;
1948 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1949 goto out;
1950 status = nfserr_resource;
1951 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1952 goto out;
1953
1954 status = nfs41_check_op_ordering(args);
1955 if (status) {
1956 op = &args->ops[0];
1957 op->status = status;
1958 resp->opcnt = 1;
1959 goto encode_op;
1960 }
1961
1962 trace_nfsd_compound(rqstp, args->opcnt);
1963 while (!status && resp->opcnt < args->opcnt) {
1964 op = &args->ops[resp->opcnt++];
1965
1966 /*
1967 * The XDR decode routines may have pre-set op->status;
1968 * for example, if there is a miscellaneous XDR error
1969 * it will be set to nfserr_bad_xdr.
1970 */
1971 if (op->status) {
1972 if (op->opnum == OP_OPEN)
1973 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1974 goto encode_op;
1975 }
1976
1977 if (!current_fh->fh_dentry) {
1978 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1979 op->status = nfserr_nofilehandle;
1980 goto encode_op;
1981 }
1982 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1983 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1984 op->status = nfserr_moved;
1985 goto encode_op;
1986 }
1987
1988 fh_clear_wcc(current_fh);
1989
1990 /* If op is non-idempotent */
1991 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1992 /*
1993 * Don't execute this op if we couldn't encode a
1994 * succesful reply:
1995 */
1996 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
1997 /*
1998 * Plus if there's another operation, make sure
1999 * we'll have space to at least encode an error:
2000 */
2001 if (resp->opcnt < args->opcnt)
2002 plen += COMPOUND_ERR_SLACK_SPACE;
2003 op->status = nfsd4_check_resp_size(resp, plen);
2004 }
2005
2006 if (op->status)
2007 goto encode_op;
2008
2009 if (op->opdesc->op_get_currentstateid)
2010 op->opdesc->op_get_currentstateid(cstate, &op->u);
2011 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2012
2013 /* Only from SEQUENCE */
2014 if (cstate->status == nfserr_replay_cache) {
2015 dprintk("%s NFS4.1 replay from cache\n", __func__);
2016 status = op->status;
2017 goto out;
2018 }
2019 if (!op->status) {
2020 if (op->opdesc->op_set_currentstateid)
2021 op->opdesc->op_set_currentstateid(cstate, &op->u);
2022
2023 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2024 clear_current_stateid(cstate);
2025
2026 if (need_wrongsec_check(rqstp))
2027 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2028 }
2029encode_op:
2030 if (op->status == nfserr_replay_me) {
2031 op->replay = &cstate->replay_owner->so_replay;
2032 nfsd4_encode_replay(&resp->xdr, op);
2033 status = op->status = op->replay->rp_status;
2034 } else {
2035 nfsd4_encode_operation(resp, op);
2036 status = op->status;
2037 }
2038
2039 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2040 nfsd4_op_name(op->opnum));
2041
2042 nfsd4_cstate_clear_replay(cstate);
2043 nfsd4_increment_op_stats(op->opnum);
2044 }
2045
2046 cstate->status = status;
2047 fh_put(current_fh);
2048 fh_put(save_fh);
2049 BUG_ON(cstate->replay_owner);
2050out:
2051 /* Reset deferral mechanism for RPC deferrals */
2052 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2053 dprintk("nfsv4 compound returned %d\n", ntohl(status));
2054 return status;
2055}
2056
2057#define op_encode_hdr_size (2)
2058#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2059#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2060#define op_encode_change_info_maxsz (5)
2061#define nfs4_fattr_bitmap_maxsz (4)
2062
2063/* We'll fall back on returning no lockowner if run out of space: */
2064#define op_encode_lockowner_maxsz (0)
2065#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2066
2067#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2068
2069#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2070#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2071 op_encode_ace_maxsz)
2072
2073#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2074
2075static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2076{
2077 return (op_encode_hdr_size) * sizeof(__be32);
2078}
2079
2080static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2081{
2082 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2083}
2084
2085static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2086{
2087 /* ac_supported, ac_resp_access */
2088 return (op_encode_hdr_size + 2)* sizeof(__be32);
2089}
2090
2091static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2092{
2093 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2094}
2095
2096static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2097{
2098 return (op_encode_hdr_size + op_encode_change_info_maxsz
2099 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2100}
2101
2102/*
2103 * Note since this is an idempotent operation we won't insist on failing
2104 * the op prematurely if the estimate is too large. We may turn off splice
2105 * reads unnecessarily.
2106 */
2107static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2108 struct nfsd4_op *op)
2109{
2110 u32 *bmap = op->u.getattr.ga_bmval;
2111 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2112 u32 ret = 0;
2113
2114 if (bmap0 & FATTR4_WORD0_ACL)
2115 return svc_max_payload(rqstp);
2116 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2117 return svc_max_payload(rqstp);
2118
2119 if (bmap1 & FATTR4_WORD1_OWNER) {
2120 ret += IDMAP_NAMESZ + 4;
2121 bmap1 &= ~FATTR4_WORD1_OWNER;
2122 }
2123 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2124 ret += IDMAP_NAMESZ + 4;
2125 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2126 }
2127 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2128 ret += NFS4_FHSIZE + 4;
2129 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2130 }
2131 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2132 ret += NFS4_MAXLABELLEN + 12;
2133 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2134 }
2135 /*
2136 * Largest of remaining attributes are 16 bytes (e.g.,
2137 * supported_attributes)
2138 */
2139 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2140 /* bitmask, length */
2141 ret += 20;
2142 return ret;
2143}
2144
2145static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2146{
2147 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2148}
2149
2150static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2151{
2152 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2153 * sizeof(__be32);
2154}
2155
2156static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2157{
2158 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2159 * sizeof(__be32);
2160}
2161
2162static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2163{
2164 return (op_encode_hdr_size + op_encode_stateid_maxsz
2165 + op_encode_change_info_maxsz + 1
2166 + nfs4_fattr_bitmap_maxsz
2167 + op_encode_delegation_maxsz) * sizeof(__be32);
2168}
2169
2170static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2171{
2172 u32 maxcount = 0, rlen = 0;
2173
2174 maxcount = svc_max_payload(rqstp);
2175 rlen = min(op->u.read.rd_length, maxcount);
2176
2177 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2178}
2179
2180static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2181{
2182 u32 maxcount = 0, rlen = 0;
2183
2184 maxcount = svc_max_payload(rqstp);
2185 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2186
2187 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2188 XDR_QUADLEN(rlen)) * sizeof(__be32);
2189}
2190
2191static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2192{
2193 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2194}
2195
2196static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2197{
2198 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2199 * sizeof(__be32);
2200}
2201
2202static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2203{
2204 return (op_encode_hdr_size + op_encode_change_info_maxsz
2205 + op_encode_change_info_maxsz) * sizeof(__be32);
2206}
2207
2208static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2209 struct nfsd4_op *op)
2210{
2211 return (op_encode_hdr_size
2212 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2213}
2214
2215static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2216{
2217 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2218 * sizeof(__be32);
2219}
2220
2221static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2222{
2223 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2224}
2225
2226static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2227{
2228 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2229 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2230}
2231
2232static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2233{
2234 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2235 sizeof(__be32);
2236}
2237
2238static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2239{
2240 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2241}
2242
2243static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2244{
2245 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2246 1 + 1 + /* eir_flags, spr_how */\
2247 4 + /* spo_must_enforce & _allow with bitmap */\
2248 2 + /*eir_server_owner.so_minor_id */\
2249 /* eir_server_owner.so_major_id<> */\
2250 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2251 /* eir_server_scope<> */\
2252 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2253 1 + /* eir_server_impl_id array length */\
2254 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2255}
2256
2257static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2258{
2259 return (op_encode_hdr_size + \
2260 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2261 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2262}
2263
2264static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2265{
2266 return (op_encode_hdr_size + \
2267 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2268 2 + /* csr_sequence, csr_flags */\
2269 op_encode_channel_attrs_maxsz + \
2270 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2271}
2272
2273static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2274{
2275 return (op_encode_hdr_size +
2276 1 /* wr_callback */ +
2277 op_encode_stateid_maxsz /* wr_callback */ +
2278 2 /* wr_count */ +
2279 1 /* wr_committed */ +
2280 op_encode_verifier_maxsz +
2281 1 /* cr_consecutive */ +
2282 1 /* cr_synchronous */) * sizeof(__be32);
2283}
2284
2285static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2286 struct nfsd4_op *op)
2287{
2288 return (op_encode_hdr_size +
2289 2 /* osr_count */ +
2290 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2291}
2292
2293#ifdef CONFIG_NFSD_PNFS
2294static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2295{
2296 u32 maxcount = 0, rlen = 0;
2297
2298 maxcount = svc_max_payload(rqstp);
2299 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2300
2301 return (op_encode_hdr_size +
2302 1 /* gd_layout_type*/ +
2303 XDR_QUADLEN(rlen) +
2304 2 /* gd_notify_types */) * sizeof(__be32);
2305}
2306
2307/*
2308 * At this stage we don't really know what layout driver will handle the request,
2309 * so we need to define an arbitrary upper bound here.
2310 */
2311#define MAX_LAYOUT_SIZE 128
2312static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2313{
2314 return (op_encode_hdr_size +
2315 1 /* logr_return_on_close */ +
2316 op_encode_stateid_maxsz +
2317 1 /* nr of layouts */ +
2318 MAX_LAYOUT_SIZE) * sizeof(__be32);
2319}
2320
2321static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2322{
2323 return (op_encode_hdr_size +
2324 1 /* locr_newsize */ +
2325 2 /* ns_size */) * sizeof(__be32);
2326}
2327
2328static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2329{
2330 return (op_encode_hdr_size +
2331 1 /* lrs_stateid */ +
2332 op_encode_stateid_maxsz) * sizeof(__be32);
2333}
2334#endif /* CONFIG_NFSD_PNFS */
2335
2336
2337static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2338{
2339 return (op_encode_hdr_size + 3) * sizeof(__be32);
2340}
2341
2342static const struct nfsd4_operation nfsd4_ops[] = {
2343 [OP_ACCESS] = {
2344 .op_func = nfsd4_access,
2345 .op_name = "OP_ACCESS",
2346 .op_rsize_bop = nfsd4_access_rsize,
2347 },
2348 [OP_CLOSE] = {
2349 .op_func = nfsd4_close,
2350 .op_flags = OP_MODIFIES_SOMETHING,
2351 .op_name = "OP_CLOSE",
2352 .op_rsize_bop = nfsd4_status_stateid_rsize,
2353 .op_get_currentstateid = nfsd4_get_closestateid,
2354 .op_set_currentstateid = nfsd4_set_closestateid,
2355 },
2356 [OP_COMMIT] = {
2357 .op_func = nfsd4_commit,
2358 .op_flags = OP_MODIFIES_SOMETHING,
2359 .op_name = "OP_COMMIT",
2360 .op_rsize_bop = nfsd4_commit_rsize,
2361 },
2362 [OP_CREATE] = {
2363 .op_func = nfsd4_create,
2364 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2365 .op_name = "OP_CREATE",
2366 .op_rsize_bop = nfsd4_create_rsize,
2367 },
2368 [OP_DELEGRETURN] = {
2369 .op_func = nfsd4_delegreturn,
2370 .op_flags = OP_MODIFIES_SOMETHING,
2371 .op_name = "OP_DELEGRETURN",
2372 .op_rsize_bop = nfsd4_only_status_rsize,
2373 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2374 },
2375 [OP_GETATTR] = {
2376 .op_func = nfsd4_getattr,
2377 .op_flags = ALLOWED_ON_ABSENT_FS,
2378 .op_rsize_bop = nfsd4_getattr_rsize,
2379 .op_name = "OP_GETATTR",
2380 },
2381 [OP_GETFH] = {
2382 .op_func = nfsd4_getfh,
2383 .op_name = "OP_GETFH",
2384 .op_rsize_bop = nfsd4_getfh_rsize,
2385 },
2386 [OP_LINK] = {
2387 .op_func = nfsd4_link,
2388 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2389 | OP_CACHEME,
2390 .op_name = "OP_LINK",
2391 .op_rsize_bop = nfsd4_link_rsize,
2392 },
2393 [OP_LOCK] = {
2394 .op_func = nfsd4_lock,
2395 .op_flags = OP_MODIFIES_SOMETHING |
2396 OP_NONTRIVIAL_ERROR_ENCODE,
2397 .op_name = "OP_LOCK",
2398 .op_rsize_bop = nfsd4_lock_rsize,
2399 .op_set_currentstateid = nfsd4_set_lockstateid,
2400 },
2401 [OP_LOCKT] = {
2402 .op_func = nfsd4_lockt,
2403 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2404 .op_name = "OP_LOCKT",
2405 .op_rsize_bop = nfsd4_lock_rsize,
2406 },
2407 [OP_LOCKU] = {
2408 .op_func = nfsd4_locku,
2409 .op_flags = OP_MODIFIES_SOMETHING,
2410 .op_name = "OP_LOCKU",
2411 .op_rsize_bop = nfsd4_status_stateid_rsize,
2412 .op_get_currentstateid = nfsd4_get_lockustateid,
2413 },
2414 [OP_LOOKUP] = {
2415 .op_func = nfsd4_lookup,
2416 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2417 .op_name = "OP_LOOKUP",
2418 .op_rsize_bop = nfsd4_only_status_rsize,
2419 },
2420 [OP_LOOKUPP] = {
2421 .op_func = nfsd4_lookupp,
2422 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2423 .op_name = "OP_LOOKUPP",
2424 .op_rsize_bop = nfsd4_only_status_rsize,
2425 },
2426 [OP_NVERIFY] = {
2427 .op_func = nfsd4_nverify,
2428 .op_name = "OP_NVERIFY",
2429 .op_rsize_bop = nfsd4_only_status_rsize,
2430 },
2431 [OP_OPEN] = {
2432 .op_func = nfsd4_open,
2433 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2434 .op_name = "OP_OPEN",
2435 .op_rsize_bop = nfsd4_open_rsize,
2436 .op_set_currentstateid = nfsd4_set_openstateid,
2437 },
2438 [OP_OPEN_CONFIRM] = {
2439 .op_func = nfsd4_open_confirm,
2440 .op_flags = OP_MODIFIES_SOMETHING,
2441 .op_name = "OP_OPEN_CONFIRM",
2442 .op_rsize_bop = nfsd4_status_stateid_rsize,
2443 },
2444 [OP_OPEN_DOWNGRADE] = {
2445 .op_func = nfsd4_open_downgrade,
2446 .op_flags = OP_MODIFIES_SOMETHING,
2447 .op_name = "OP_OPEN_DOWNGRADE",
2448 .op_rsize_bop = nfsd4_status_stateid_rsize,
2449 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2450 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2451 },
2452 [OP_PUTFH] = {
2453 .op_func = nfsd4_putfh,
2454 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2455 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2456 .op_name = "OP_PUTFH",
2457 .op_rsize_bop = nfsd4_only_status_rsize,
2458 },
2459 [OP_PUTPUBFH] = {
2460 .op_func = nfsd4_putrootfh,
2461 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2462 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2463 .op_name = "OP_PUTPUBFH",
2464 .op_rsize_bop = nfsd4_only_status_rsize,
2465 },
2466 [OP_PUTROOTFH] = {
2467 .op_func = nfsd4_putrootfh,
2468 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2469 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2470 .op_name = "OP_PUTROOTFH",
2471 .op_rsize_bop = nfsd4_only_status_rsize,
2472 },
2473 [OP_READ] = {
2474 .op_func = nfsd4_read,
2475 .op_release = nfsd4_read_release,
2476 .op_name = "OP_READ",
2477 .op_rsize_bop = nfsd4_read_rsize,
2478 .op_get_currentstateid = nfsd4_get_readstateid,
2479 },
2480 [OP_READDIR] = {
2481 .op_func = nfsd4_readdir,
2482 .op_name = "OP_READDIR",
2483 .op_rsize_bop = nfsd4_readdir_rsize,
2484 },
2485 [OP_READLINK] = {
2486 .op_func = nfsd4_readlink,
2487 .op_name = "OP_READLINK",
2488 .op_rsize_bop = nfsd4_readlink_rsize,
2489 },
2490 [OP_REMOVE] = {
2491 .op_func = nfsd4_remove,
2492 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2493 .op_name = "OP_REMOVE",
2494 .op_rsize_bop = nfsd4_remove_rsize,
2495 },
2496 [OP_RENAME] = {
2497 .op_func = nfsd4_rename,
2498 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2499 .op_name = "OP_RENAME",
2500 .op_rsize_bop = nfsd4_rename_rsize,
2501 },
2502 [OP_RENEW] = {
2503 .op_func = nfsd4_renew,
2504 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2505 | OP_MODIFIES_SOMETHING,
2506 .op_name = "OP_RENEW",
2507 .op_rsize_bop = nfsd4_only_status_rsize,
2508
2509 },
2510 [OP_RESTOREFH] = {
2511 .op_func = nfsd4_restorefh,
2512 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2513 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2514 .op_name = "OP_RESTOREFH",
2515 .op_rsize_bop = nfsd4_only_status_rsize,
2516 },
2517 [OP_SAVEFH] = {
2518 .op_func = nfsd4_savefh,
2519 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2520 .op_name = "OP_SAVEFH",
2521 .op_rsize_bop = nfsd4_only_status_rsize,
2522 },
2523 [OP_SECINFO] = {
2524 .op_func = nfsd4_secinfo,
2525 .op_release = nfsd4_secinfo_release,
2526 .op_flags = OP_HANDLES_WRONGSEC,
2527 .op_name = "OP_SECINFO",
2528 .op_rsize_bop = nfsd4_secinfo_rsize,
2529 },
2530 [OP_SETATTR] = {
2531 .op_func = nfsd4_setattr,
2532 .op_name = "OP_SETATTR",
2533 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2534 | OP_NONTRIVIAL_ERROR_ENCODE,
2535 .op_rsize_bop = nfsd4_setattr_rsize,
2536 .op_get_currentstateid = nfsd4_get_setattrstateid,
2537 },
2538 [OP_SETCLIENTID] = {
2539 .op_func = nfsd4_setclientid,
2540 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2541 | OP_MODIFIES_SOMETHING | OP_CACHEME
2542 | OP_NONTRIVIAL_ERROR_ENCODE,
2543 .op_name = "OP_SETCLIENTID",
2544 .op_rsize_bop = nfsd4_setclientid_rsize,
2545 },
2546 [OP_SETCLIENTID_CONFIRM] = {
2547 .op_func = nfsd4_setclientid_confirm,
2548 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2549 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2550 .op_name = "OP_SETCLIENTID_CONFIRM",
2551 .op_rsize_bop = nfsd4_only_status_rsize,
2552 },
2553 [OP_VERIFY] = {
2554 .op_func = nfsd4_verify,
2555 .op_name = "OP_VERIFY",
2556 .op_rsize_bop = nfsd4_only_status_rsize,
2557 },
2558 [OP_WRITE] = {
2559 .op_func = nfsd4_write,
2560 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2561 .op_name = "OP_WRITE",
2562 .op_rsize_bop = nfsd4_write_rsize,
2563 .op_get_currentstateid = nfsd4_get_writestateid,
2564 },
2565 [OP_RELEASE_LOCKOWNER] = {
2566 .op_func = nfsd4_release_lockowner,
2567 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2568 | OP_MODIFIES_SOMETHING,
2569 .op_name = "OP_RELEASE_LOCKOWNER",
2570 .op_rsize_bop = nfsd4_only_status_rsize,
2571 },
2572
2573 /* NFSv4.1 operations */
2574 [OP_EXCHANGE_ID] = {
2575 .op_func = nfsd4_exchange_id,
2576 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2577 | OP_MODIFIES_SOMETHING,
2578 .op_name = "OP_EXCHANGE_ID",
2579 .op_rsize_bop = nfsd4_exchange_id_rsize,
2580 },
2581 [OP_BACKCHANNEL_CTL] = {
2582 .op_func = nfsd4_backchannel_ctl,
2583 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2584 .op_name = "OP_BACKCHANNEL_CTL",
2585 .op_rsize_bop = nfsd4_only_status_rsize,
2586 },
2587 [OP_BIND_CONN_TO_SESSION] = {
2588 .op_func = nfsd4_bind_conn_to_session,
2589 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2590 | OP_MODIFIES_SOMETHING,
2591 .op_name = "OP_BIND_CONN_TO_SESSION",
2592 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2593 },
2594 [OP_CREATE_SESSION] = {
2595 .op_func = nfsd4_create_session,
2596 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2597 | OP_MODIFIES_SOMETHING,
2598 .op_name = "OP_CREATE_SESSION",
2599 .op_rsize_bop = nfsd4_create_session_rsize,
2600 },
2601 [OP_DESTROY_SESSION] = {
2602 .op_func = nfsd4_destroy_session,
2603 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2604 | OP_MODIFIES_SOMETHING,
2605 .op_name = "OP_DESTROY_SESSION",
2606 .op_rsize_bop = nfsd4_only_status_rsize,
2607 },
2608 [OP_SEQUENCE] = {
2609 .op_func = nfsd4_sequence,
2610 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2611 .op_name = "OP_SEQUENCE",
2612 .op_rsize_bop = nfsd4_sequence_rsize,
2613 },
2614 [OP_DESTROY_CLIENTID] = {
2615 .op_func = nfsd4_destroy_clientid,
2616 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2617 | OP_MODIFIES_SOMETHING,
2618 .op_name = "OP_DESTROY_CLIENTID",
2619 .op_rsize_bop = nfsd4_only_status_rsize,
2620 },
2621 [OP_RECLAIM_COMPLETE] = {
2622 .op_func = nfsd4_reclaim_complete,
2623 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2624 .op_name = "OP_RECLAIM_COMPLETE",
2625 .op_rsize_bop = nfsd4_only_status_rsize,
2626 },
2627 [OP_SECINFO_NO_NAME] = {
2628 .op_func = nfsd4_secinfo_no_name,
2629 .op_release = nfsd4_secinfo_no_name_release,
2630 .op_flags = OP_HANDLES_WRONGSEC,
2631 .op_name = "OP_SECINFO_NO_NAME",
2632 .op_rsize_bop = nfsd4_secinfo_rsize,
2633 },
2634 [OP_TEST_STATEID] = {
2635 .op_func = nfsd4_test_stateid,
2636 .op_flags = ALLOWED_WITHOUT_FH,
2637 .op_name = "OP_TEST_STATEID",
2638 .op_rsize_bop = nfsd4_test_stateid_rsize,
2639 },
2640 [OP_FREE_STATEID] = {
2641 .op_func = nfsd4_free_stateid,
2642 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2643 .op_name = "OP_FREE_STATEID",
2644 .op_get_currentstateid = nfsd4_get_freestateid,
2645 .op_rsize_bop = nfsd4_only_status_rsize,
2646 },
2647#ifdef CONFIG_NFSD_PNFS
2648 [OP_GETDEVICEINFO] = {
2649 .op_func = nfsd4_getdeviceinfo,
2650 .op_release = nfsd4_getdeviceinfo_release,
2651 .op_flags = ALLOWED_WITHOUT_FH,
2652 .op_name = "OP_GETDEVICEINFO",
2653 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2654 },
2655 [OP_LAYOUTGET] = {
2656 .op_func = nfsd4_layoutget,
2657 .op_release = nfsd4_layoutget_release,
2658 .op_flags = OP_MODIFIES_SOMETHING,
2659 .op_name = "OP_LAYOUTGET",
2660 .op_rsize_bop = nfsd4_layoutget_rsize,
2661 },
2662 [OP_LAYOUTCOMMIT] = {
2663 .op_func = nfsd4_layoutcommit,
2664 .op_flags = OP_MODIFIES_SOMETHING,
2665 .op_name = "OP_LAYOUTCOMMIT",
2666 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2667 },
2668 [OP_LAYOUTRETURN] = {
2669 .op_func = nfsd4_layoutreturn,
2670 .op_flags = OP_MODIFIES_SOMETHING,
2671 .op_name = "OP_LAYOUTRETURN",
2672 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2673 },
2674#endif /* CONFIG_NFSD_PNFS */
2675
2676 /* NFSv4.2 operations */
2677 [OP_ALLOCATE] = {
2678 .op_func = nfsd4_allocate,
2679 .op_flags = OP_MODIFIES_SOMETHING,
2680 .op_name = "OP_ALLOCATE",
2681 .op_rsize_bop = nfsd4_only_status_rsize,
2682 },
2683 [OP_DEALLOCATE] = {
2684 .op_func = nfsd4_deallocate,
2685 .op_flags = OP_MODIFIES_SOMETHING,
2686 .op_name = "OP_DEALLOCATE",
2687 .op_rsize_bop = nfsd4_only_status_rsize,
2688 },
2689 [OP_CLONE] = {
2690 .op_func = nfsd4_clone,
2691 .op_flags = OP_MODIFIES_SOMETHING,
2692 .op_name = "OP_CLONE",
2693 .op_rsize_bop = nfsd4_only_status_rsize,
2694 },
2695 [OP_COPY] = {
2696 .op_func = nfsd4_copy,
2697 .op_flags = OP_MODIFIES_SOMETHING,
2698 .op_name = "OP_COPY",
2699 .op_rsize_bop = nfsd4_copy_rsize,
2700 },
2701 [OP_SEEK] = {
2702 .op_func = nfsd4_seek,
2703 .op_name = "OP_SEEK",
2704 .op_rsize_bop = nfsd4_seek_rsize,
2705 },
2706 [OP_OFFLOAD_STATUS] = {
2707 .op_func = nfsd4_offload_status,
2708 .op_name = "OP_OFFLOAD_STATUS",
2709 .op_rsize_bop = nfsd4_offload_status_rsize,
2710 },
2711 [OP_OFFLOAD_CANCEL] = {
2712 .op_func = nfsd4_offload_cancel,
2713 .op_flags = OP_MODIFIES_SOMETHING,
2714 .op_name = "OP_OFFLOAD_CANCEL",
2715 .op_rsize_bop = nfsd4_only_status_rsize,
2716 },
2717};
2718
2719/**
2720 * nfsd4_spo_must_allow - Determine if the compound op contains an
2721 * operation that is allowed to be sent with machine credentials
2722 *
2723 * @rqstp: a pointer to the struct svc_rqst
2724 *
2725 * Checks to see if the compound contains a spo_must_allow op
2726 * and confirms that it was sent with the proper machine creds.
2727 */
2728
2729bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2730{
2731 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2732 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2733 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2734 struct nfsd4_compound_state *cstate = &resp->cstate;
2735 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2736 u32 opiter;
2737
2738 if (!cstate->minorversion)
2739 return false;
2740
2741 if (cstate->spo_must_allowed == true)
2742 return true;
2743
2744 opiter = resp->opcnt;
2745 while (opiter < argp->opcnt) {
2746 this = &argp->ops[opiter++];
2747 if (test_bit(this->opnum, allow->u.longs) &&
2748 cstate->clp->cl_mach_cred &&
2749 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2750 cstate->spo_must_allowed = true;
2751 return true;
2752 }
2753 }
2754 cstate->spo_must_allowed = false;
2755 return false;
2756}
2757
2758int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2759{
2760 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2761 return op_encode_hdr_size * sizeof(__be32);
2762
2763 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2764 return OPDESC(op)->op_rsize_bop(rqstp, op);
2765}
2766
2767void warn_on_nonidempotent_op(struct nfsd4_op *op)
2768{
2769 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2770 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2771 op->opnum, nfsd4_op_name(op->opnum));
2772 WARN_ON_ONCE(1);
2773 }
2774}
2775
2776static const char *nfsd4_op_name(unsigned opnum)
2777{
2778 if (opnum < ARRAY_SIZE(nfsd4_ops))
2779 return nfsd4_ops[opnum].op_name;
2780 return "unknown_operation";
2781}
2782
2783#define nfsd4_voidres nfsd4_voidargs
2784struct nfsd4_voidargs { int dummy; };
2785
2786static const struct svc_procedure nfsd_procedures4[2] = {
2787 [NFSPROC4_NULL] = {
2788 .pc_func = nfsd4_proc_null,
2789 .pc_encode = nfs4svc_encode_voidres,
2790 .pc_argsize = sizeof(struct nfsd4_voidargs),
2791 .pc_ressize = sizeof(struct nfsd4_voidres),
2792 .pc_cachetype = RC_NOCACHE,
2793 .pc_xdrressize = 1,
2794 },
2795 [NFSPROC4_COMPOUND] = {
2796 .pc_func = nfsd4_proc_compound,
2797 .pc_decode = nfs4svc_decode_compoundargs,
2798 .pc_encode = nfs4svc_encode_compoundres,
2799 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2800 .pc_ressize = sizeof(struct nfsd4_compoundres),
2801 .pc_release = nfsd4_release_compoundargs,
2802 .pc_cachetype = RC_NOCACHE,
2803 .pc_xdrressize = NFSD_BUFSIZE/4,
2804 },
2805};
2806
2807static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2808const struct svc_version nfsd_version4 = {
2809 .vs_vers = 4,
2810 .vs_nproc = 2,
2811 .vs_proc = nfsd_procedures4,
2812 .vs_count = nfsd_count3,
2813 .vs_dispatch = nfsd_dispatch,
2814 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2815 .vs_rpcb_optnl = true,
2816 .vs_need_cong_ctrl = true,
2817};
2818
2819/*
2820 * Local variables:
2821 * c-basic-offset: 8
2822 * End:
2823 */