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defconfig: exynos9610: Re-add dropped Wi-Fi AP options lost
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / fs / nfsd / nfs4proc.c
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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/fs_struct.h>
36#include <linux/file.h>
37#include <linux/falloc.h>
38#include <linux/slab.h>
39
40#include "idmap.h"
41#include "cache.h"
42#include "xdr4.h"
43#include "vfs.h"
44#include "current_stateid.h"
45#include "netns.h"
46#include "acl.h"
47#include "pnfs.h"
48#include "trace.h"
49
50#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
51#include <linux/security.h>
52
53static inline void
54nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
55{
56 struct inode *inode = d_inode(resfh->fh_dentry);
57 int status;
58
59 inode_lock(inode);
60 status = security_inode_setsecctx(resfh->fh_dentry,
61 label->data, label->len);
62 inode_unlock(inode);
63
64 if (status)
65 /*
66 * XXX: We should really fail the whole open, but we may
67 * already have created a new file, so it may be too
68 * late. For now this seems the least of evils:
69 */
70 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
71
72 return;
73}
74#else
75static inline void
76nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
77{ }
78#endif
79
80#define NFSDDBG_FACILITY NFSDDBG_PROC
81
82static u32 nfsd_attrmask[] = {
83 NFSD_WRITEABLE_ATTRS_WORD0,
84 NFSD_WRITEABLE_ATTRS_WORD1,
85 NFSD_WRITEABLE_ATTRS_WORD2
86};
87
88static u32 nfsd41_ex_attrmask[] = {
89 NFSD_SUPPATTR_EXCLCREAT_WORD0,
90 NFSD_SUPPATTR_EXCLCREAT_WORD1,
91 NFSD_SUPPATTR_EXCLCREAT_WORD2
92};
93
94static __be32
95check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
96 u32 *bmval, u32 *writable)
97{
98 struct dentry *dentry = cstate->current_fh.fh_dentry;
99 struct svc_export *exp = cstate->current_fh.fh_export;
100
101 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
102 return nfserr_attrnotsupp;
103 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
104 return nfserr_attrnotsupp;
105 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
106 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
107 return nfserr_attrnotsupp;
108 if (writable && !bmval_is_subset(bmval, writable))
109 return nfserr_inval;
110 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
111 (bmval[1] & FATTR4_WORD1_MODE))
112 return nfserr_inval;
113 return nfs_ok;
114}
115
116static __be32
117nfsd4_check_open_attributes(struct svc_rqst *rqstp,
118 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
119{
120 __be32 status = nfs_ok;
121
122 if (open->op_create == NFS4_OPEN_CREATE) {
123 if (open->op_createmode == NFS4_CREATE_UNCHECKED
124 || open->op_createmode == NFS4_CREATE_GUARDED)
125 status = check_attr_support(rqstp, cstate,
126 open->op_bmval, nfsd_attrmask);
127 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
128 status = check_attr_support(rqstp, cstate,
129 open->op_bmval, nfsd41_ex_attrmask);
130 }
131
132 return status;
133}
134
135static int
136is_create_with_attrs(struct nfsd4_open *open)
137{
138 return open->op_create == NFS4_OPEN_CREATE
139 && (open->op_createmode == NFS4_CREATE_UNCHECKED
140 || open->op_createmode == NFS4_CREATE_GUARDED
141 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
142}
143
144/*
145 * if error occurs when setting the acl, just clear the acl bit
146 * in the returned attr bitmap.
147 */
148static void
149do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
150 struct nfs4_acl *acl, u32 *bmval)
151{
152 __be32 status;
153
154 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
155 if (status)
156 /*
157 * We should probably fail the whole open at this point,
158 * but we've already created the file, so it's too late;
159 * So this seems the least of evils:
160 */
161 bmval[0] &= ~FATTR4_WORD0_ACL;
162}
163
164static inline void
165fh_dup2(struct svc_fh *dst, struct svc_fh *src)
166{
167 fh_put(dst);
168 dget(src->fh_dentry);
169 if (src->fh_export)
170 exp_get(src->fh_export);
171 *dst = *src;
172}
173
174static __be32
175do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
176{
177 __be32 status;
178
179 if (open->op_truncate &&
180 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
181 return nfserr_inval;
182
183 accmode |= NFSD_MAY_READ_IF_EXEC;
184
185 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
186 accmode |= NFSD_MAY_READ;
187 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
188 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
189 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
190 accmode |= NFSD_MAY_WRITE;
191
192 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
193
194 return status;
195}
196
197static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
198{
199 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
200
201 if (S_ISREG(mode))
202 return nfs_ok;
203 if (S_ISDIR(mode))
204 return nfserr_isdir;
205 /*
206 * Using err_symlink as our catch-all case may look odd; but
207 * there's no other obvious error for this case in 4.0, and we
208 * happen to know that it will cause the linux v4 client to do
209 * the right thing on attempts to open something other than a
210 * regular file.
211 */
212 return nfserr_symlink;
213}
214
215static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
216{
217 if (nfsd4_has_session(cstate))
218 return;
219 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
220 &resfh->fh_handle);
221}
222
223static __be32
224do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
225{
226 struct svc_fh *current_fh = &cstate->current_fh;
227 int accmode;
228 __be32 status;
229
230 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
231 if (!*resfh)
232 return nfserr_jukebox;
233 fh_init(*resfh, NFS4_FHSIZE);
234 open->op_truncate = 0;
235
236 if (open->op_create) {
237 /* FIXME: check session persistence and pnfs flags.
238 * The nfsv4.1 spec requires the following semantics:
239 *
240 * Persistent | pNFS | Server REQUIRED | Client Allowed
241 * Reply Cache | server | |
242 * -------------+--------+-----------------+--------------------
243 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
244 * | | | (SHOULD)
245 * | | and EXCLUSIVE4 | or EXCLUSIVE4
246 * | | | (SHOULD NOT)
247 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
248 * yes | no | GUARDED4 | GUARDED4
249 * yes | yes | GUARDED4 | GUARDED4
250 */
251
252 /*
253 * Note: create modes (UNCHECKED,GUARDED...) are the same
254 * in NFSv4 as in v3 except EXCLUSIVE4_1.
255 */
256 current->fs->umask = open->op_umask;
257 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
258 open->op_fname.len, &open->op_iattr,
259 *resfh, open->op_createmode,
260 (u32 *)open->op_verf.data,
261 &open->op_truncate, &open->op_created);
262 current->fs->umask = 0;
263
264 if (!status && open->op_label.len)
265 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
266
267 /*
268 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
269 * use the returned bitmask to indicate which attributes
270 * we used to store the verifier:
271 */
272 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
273 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
274 FATTR4_WORD1_TIME_MODIFY);
275 } else
276 /*
277 * Note this may exit with the parent still locked.
278 * We will hold the lock until nfsd4_open's final
279 * lookup, to prevent renames or unlinks until we've had
280 * a chance to an acquire a delegation if appropriate.
281 */
282 status = nfsd_lookup(rqstp, current_fh,
283 open->op_fname.data, open->op_fname.len, *resfh);
284 if (status)
285 goto out;
286 status = nfsd_check_obj_isreg(*resfh);
287 if (status)
288 goto out;
289
290 if (is_create_with_attrs(open) && open->op_acl != NULL)
291 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
292
293 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
294 accmode = NFSD_MAY_NOP;
295 if (open->op_created ||
296 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
297 accmode |= NFSD_MAY_OWNER_OVERRIDE;
298 status = do_open_permission(rqstp, *resfh, open, accmode);
299 set_change_info(&open->op_cinfo, current_fh);
300out:
301 return status;
302}
303
304static __be32
305do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
306{
307 struct svc_fh *current_fh = &cstate->current_fh;
308 __be32 status;
309 int accmode = 0;
310
311 /* We don't know the target directory, and therefore can not
312 * set the change info
313 */
314
315 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
316
317 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
318
319 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
320 (open->op_iattr.ia_size == 0);
321 /*
322 * In the delegation case, the client is telling us about an
323 * open that it *already* performed locally, some time ago. We
324 * should let it succeed now if possible.
325 *
326 * In the case of a CLAIM_FH open, on the other hand, the client
327 * may be counting on us to enforce permissions (the Linux 4.1
328 * client uses this for normal opens, for example).
329 */
330 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
331 accmode = NFSD_MAY_OWNER_OVERRIDE;
332
333 status = do_open_permission(rqstp, current_fh, open, accmode);
334
335 return status;
336}
337
338static void
339copy_clientid(clientid_t *clid, struct nfsd4_session *session)
340{
341 struct nfsd4_sessionid *sid =
342 (struct nfsd4_sessionid *)session->se_sessionid.data;
343
344 clid->cl_boot = sid->clientid.cl_boot;
345 clid->cl_id = sid->clientid.cl_id;
346}
347
348static __be32
349nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
350 union nfsd4_op_u *u)
351{
352 struct nfsd4_open *open = &u->open;
353 __be32 status;
354 struct svc_fh *resfh = NULL;
355 struct net *net = SVC_NET(rqstp);
356 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
357
358 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
359 (int)open->op_fname.len, open->op_fname.data,
360 open->op_openowner);
361
362 /* This check required by spec. */
363 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
364 return nfserr_inval;
365
366 open->op_created = 0;
367 /*
368 * RFC5661 18.51.3
369 * Before RECLAIM_COMPLETE done, server should deny new lock
370 */
371 if (nfsd4_has_session(cstate) &&
372 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
373 &cstate->session->se_client->cl_flags) &&
374 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
375 return nfserr_grace;
376
377 if (nfsd4_has_session(cstate))
378 copy_clientid(&open->op_clientid, cstate->session);
379
380 /* check seqid for replay. set nfs4_owner */
381 status = nfsd4_process_open1(cstate, open, nn);
382 if (status == nfserr_replay_me) {
383 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
384 fh_put(&cstate->current_fh);
385 fh_copy_shallow(&cstate->current_fh.fh_handle,
386 &rp->rp_openfh);
387 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
388 if (status)
389 dprintk("nfsd4_open: replay failed"
390 " restoring previous filehandle\n");
391 else
392 status = nfserr_replay_me;
393 }
394 if (status)
395 goto out;
396 if (open->op_xdr_error) {
397 status = open->op_xdr_error;
398 goto out;
399 }
400
401 status = nfsd4_check_open_attributes(rqstp, cstate, open);
402 if (status)
403 goto out;
404
405 /* Openowner is now set, so sequence id will get bumped. Now we need
406 * these checks before we do any creates: */
407 status = nfserr_grace;
408 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
409 goto out;
410 status = nfserr_no_grace;
411 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
412 goto out;
413
414 switch (open->op_claim_type) {
415 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
416 case NFS4_OPEN_CLAIM_NULL:
417 status = do_open_lookup(rqstp, cstate, open, &resfh);
418 if (status)
419 goto out;
420 break;
421 case NFS4_OPEN_CLAIM_PREVIOUS:
422 status = nfs4_check_open_reclaim(&open->op_clientid,
423 cstate, nn);
424 if (status)
425 goto out;
426 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
427 case NFS4_OPEN_CLAIM_FH:
428 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
429 status = do_open_fhandle(rqstp, cstate, open);
430 if (status)
431 goto out;
432 resfh = &cstate->current_fh;
433 break;
434 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
435 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
436 dprintk("NFSD: unsupported OPEN claim type %d\n",
437 open->op_claim_type);
438 status = nfserr_notsupp;
439 goto out;
440 default:
441 dprintk("NFSD: Invalid OPEN claim type %d\n",
442 open->op_claim_type);
443 status = nfserr_inval;
444 goto out;
445 }
446 /*
447 * nfsd4_process_open2() does the actual opening of the file. If
448 * successful, it (1) truncates the file if open->op_truncate was
449 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
450 */
451 status = nfsd4_process_open2(rqstp, resfh, open);
452 WARN(status && open->op_created,
453 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
454 be32_to_cpu(status));
455out:
456 if (resfh && resfh != &cstate->current_fh) {
457 fh_dup2(&cstate->current_fh, resfh);
458 fh_put(resfh);
459 kfree(resfh);
460 }
461 nfsd4_cleanup_open_state(cstate, open);
462 nfsd4_bump_seqid(cstate, status);
463 return status;
464}
465
466/*
467 * OPEN is the only seqid-mutating operation whose decoding can fail
468 * with a seqid-mutating error (specifically, decoding of user names in
469 * the attributes). Therefore we have to do some processing to look up
470 * the stateowner so that we can bump the seqid.
471 */
472static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
473{
474 struct nfsd4_open *open = &op->u.open;
475
476 if (!seqid_mutating_err(ntohl(op->status)))
477 return op->status;
478 if (nfsd4_has_session(cstate))
479 return op->status;
480 open->op_xdr_error = op->status;
481 return nfsd4_open(rqstp, cstate, &op->u);
482}
483
484/*
485 * filehandle-manipulating ops.
486 */
487static __be32
488nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
489 union nfsd4_op_u *u)
490{
491 if (!cstate->current_fh.fh_dentry)
492 return nfserr_nofilehandle;
493
494 u->getfh = &cstate->current_fh;
495 return nfs_ok;
496}
497
498static __be32
499nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
500 union nfsd4_op_u *u)
501{
502 struct nfsd4_putfh *putfh = &u->putfh;
503
504 fh_put(&cstate->current_fh);
505 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
506 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
507 putfh->pf_fhlen);
508 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
509}
510
511static __be32
512nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
513 union nfsd4_op_u *u)
514{
515 __be32 status;
516
517 fh_put(&cstate->current_fh);
518 status = exp_pseudoroot(rqstp, &cstate->current_fh);
519 return status;
520}
521
522static __be32
523nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
524 union nfsd4_op_u *u)
525{
526 if (!cstate->save_fh.fh_dentry)
527 return nfserr_restorefh;
528
529 fh_dup2(&cstate->current_fh, &cstate->save_fh);
530 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
531 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
532 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
533 }
534 return nfs_ok;
535}
536
537static __be32
538nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
539 union nfsd4_op_u *u)
540{
541 if (!cstate->current_fh.fh_dentry)
542 return nfserr_nofilehandle;
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[2];
572 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
573
574 /*
575 * This is opaque to client, so no need to byte-swap. Use
576 * __force to keep sparse happy
577 */
578 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
579 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
580 memcpy(verifier->data, verf, sizeof(verifier->data));
581}
582
583static __be32
584nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
585 union nfsd4_op_u *u)
586{
587 struct nfsd4_commit *commit = &u->commit;
588
589 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
590 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
591 commit->co_count);
592}
593
594static __be32
595nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
596 union nfsd4_op_u *u)
597{
598 struct nfsd4_create *create = &u->create;
599 struct svc_fh resfh;
600 __be32 status;
601 dev_t rdev;
602
603 fh_init(&resfh, NFS4_FHSIZE);
604
605 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
606 if (status)
607 return status;
608
609 status = check_attr_support(rqstp, cstate, create->cr_bmval,
610 nfsd_attrmask);
611 if (status)
612 return status;
613
614 current->fs->umask = create->cr_umask;
615 switch (create->cr_type) {
616 case NF4LNK:
617 status = nfsd_symlink(rqstp, &cstate->current_fh,
618 create->cr_name, create->cr_namelen,
619 create->cr_data, &resfh);
620 break;
621
622 case NF4BLK:
623 status = nfserr_inval;
624 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
625 if (MAJOR(rdev) != create->cr_specdata1 ||
626 MINOR(rdev) != create->cr_specdata2)
627 goto out_umask;
628 status = nfsd_create(rqstp, &cstate->current_fh,
629 create->cr_name, create->cr_namelen,
630 &create->cr_iattr, S_IFBLK, rdev, &resfh);
631 break;
632
633 case NF4CHR:
634 status = nfserr_inval;
635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
636 if (MAJOR(rdev) != create->cr_specdata1 ||
637 MINOR(rdev) != create->cr_specdata2)
638 goto out_umask;
639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr,S_IFCHR, rdev, &resfh);
642 break;
643
644 case NF4SOCK:
645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFSOCK, 0, &resfh);
648 break;
649
650 case NF4FIFO:
651 status = nfsd_create(rqstp, &cstate->current_fh,
652 create->cr_name, create->cr_namelen,
653 &create->cr_iattr, S_IFIFO, 0, &resfh);
654 break;
655
656 case NF4DIR:
657 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
658 status = nfsd_create(rqstp, &cstate->current_fh,
659 create->cr_name, create->cr_namelen,
660 &create->cr_iattr, S_IFDIR, 0, &resfh);
661 break;
662
663 default:
664 status = nfserr_badtype;
665 }
666
667 if (status)
668 goto out;
669
670 if (create->cr_label.len)
671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
672
673 if (create->cr_acl != NULL)
674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
675 create->cr_bmval);
676
677 fh_unlock(&cstate->current_fh);
678 set_change_info(&create->cr_cinfo, &cstate->current_fh);
679 fh_dup2(&cstate->current_fh, &resfh);
680out:
681 fh_put(&resfh);
682out_umask:
683 current->fs->umask = 0;
684 return status;
685}
686
687static __be32
688nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
689 union nfsd4_op_u *u)
690{
691 struct nfsd4_getattr *getattr = &u->getattr;
692 __be32 status;
693
694 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
695 if (status)
696 return status;
697
698 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
699 return nfserr_inval;
700
701 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
702 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
703 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
704
705 getattr->ga_fhp = &cstate->current_fh;
706 return nfs_ok;
707}
708
709static __be32
710nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
711 union nfsd4_op_u *u)
712{
713 struct nfsd4_link *link = &u->link;
714 __be32 status = nfserr_nofilehandle;
715
716 if (!cstate->save_fh.fh_dentry)
717 return status;
718 status = nfsd_link(rqstp, &cstate->current_fh,
719 link->li_name, link->li_namelen, &cstate->save_fh);
720 if (!status)
721 set_change_info(&link->li_cinfo, &cstate->current_fh);
722 return status;
723}
724
725static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
726{
727 struct svc_fh tmp_fh;
728 __be32 ret;
729
730 fh_init(&tmp_fh, NFS4_FHSIZE);
731 ret = exp_pseudoroot(rqstp, &tmp_fh);
732 if (ret)
733 return ret;
734 if (tmp_fh.fh_dentry == fh->fh_dentry) {
735 fh_put(&tmp_fh);
736 return nfserr_noent;
737 }
738 fh_put(&tmp_fh);
739 return nfsd_lookup(rqstp, fh, "..", 2, fh);
740}
741
742static __be32
743nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
744 union nfsd4_op_u *u)
745{
746 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
747}
748
749static __be32
750nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
751 union nfsd4_op_u *u)
752{
753 return nfsd_lookup(rqstp, &cstate->current_fh,
754 u->lookup.lo_name, u->lookup.lo_len,
755 &cstate->current_fh);
756}
757
758static __be32
759nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
760 union nfsd4_op_u *u)
761{
762 struct nfsd4_read *read = &u->read;
763 __be32 status;
764
765 read->rd_filp = NULL;
766 if (read->rd_offset >= OFFSET_MAX)
767 return nfserr_inval;
768
769 /*
770 * If we do a zero copy read, then a client will see read data
771 * that reflects the state of the file *after* performing the
772 * following compound.
773 *
774 * To ensure proper ordering, we therefore turn off zero copy if
775 * the client wants us to do more in this compound:
776 */
777 if (!nfsd4_last_compound_op(rqstp))
778 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
779
780 /* check stateid */
781 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
782 &read->rd_stateid, RD_STATE,
783 &read->rd_filp, &read->rd_tmp_file);
784 if (status) {
785 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
786 goto out;
787 }
788 status = nfs_ok;
789out:
790 read->rd_rqstp = rqstp;
791 read->rd_fhp = &cstate->current_fh;
792 return status;
793}
794
795
796static void
797nfsd4_read_release(union nfsd4_op_u *u)
798{
799 if (u->read.rd_filp)
800 fput(u->read.rd_filp);
801}
802
803static __be32
804nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
805 union nfsd4_op_u *u)
806{
807 struct nfsd4_readdir *readdir = &u->readdir;
808 u64 cookie = readdir->rd_cookie;
809 static const nfs4_verifier zeroverf;
810
811 /* no need to check permission - this will be done in nfsd_readdir() */
812
813 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
814 return nfserr_inval;
815
816 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
817 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
818 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
819
820 if ((cookie == 1) || (cookie == 2) ||
821 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
822 return nfserr_bad_cookie;
823
824 readdir->rd_rqstp = rqstp;
825 readdir->rd_fhp = &cstate->current_fh;
826 return nfs_ok;
827}
828
829static __be32
830nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
831 union nfsd4_op_u *u)
832{
833 u->readlink.rl_rqstp = rqstp;
834 u->readlink.rl_fhp = &cstate->current_fh;
835 return nfs_ok;
836}
837
838static __be32
839nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
840 union nfsd4_op_u *u)
841{
842 struct nfsd4_remove *remove = &u->remove;
843 __be32 status;
844
845 if (opens_in_grace(SVC_NET(rqstp)))
846 return nfserr_grace;
847 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
848 remove->rm_name, remove->rm_namelen);
849 if (!status) {
850 fh_unlock(&cstate->current_fh);
851 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
852 }
853 return status;
854}
855
856static __be32
857nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
858 union nfsd4_op_u *u)
859{
860 struct nfsd4_rename *rename = &u->rename;
861 __be32 status = nfserr_nofilehandle;
862
863 if (!cstate->save_fh.fh_dentry)
864 return status;
865 if (opens_in_grace(SVC_NET(rqstp)) &&
866 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
867 return nfserr_grace;
868 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
869 rename->rn_snamelen, &cstate->current_fh,
870 rename->rn_tname, rename->rn_tnamelen);
871 if (status)
872 return status;
873 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
874 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
875 return nfs_ok;
876}
877
878static __be32
879nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
880 union nfsd4_op_u *u)
881{
882 struct nfsd4_secinfo *secinfo = &u->secinfo;
883 struct svc_export *exp;
884 struct dentry *dentry;
885 __be32 err;
886
887 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
888 if (err)
889 return err;
890 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
891 secinfo->si_name, secinfo->si_namelen,
892 &exp, &dentry);
893 if (err)
894 return err;
895 fh_unlock(&cstate->current_fh);
896 if (d_really_is_negative(dentry)) {
897 exp_put(exp);
898 err = nfserr_noent;
899 } else
900 secinfo->si_exp = exp;
901 dput(dentry);
902 if (cstate->minorversion)
903 /* See rfc 5661 section 2.6.3.1.1.8 */
904 fh_put(&cstate->current_fh);
905 return err;
906}
907
908static __be32
909nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
910 union nfsd4_op_u *u)
911{
912 __be32 err;
913
914 switch (u->secinfo_no_name.sin_style) {
915 case NFS4_SECINFO_STYLE4_CURRENT_FH:
916 break;
917 case NFS4_SECINFO_STYLE4_PARENT:
918 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
919 if (err)
920 return err;
921 break;
922 default:
923 return nfserr_inval;
924 }
925
926 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
927 fh_put(&cstate->current_fh);
928 return nfs_ok;
929}
930
931static void
932nfsd4_secinfo_release(union nfsd4_op_u *u)
933{
934 if (u->secinfo.si_exp)
935 exp_put(u->secinfo.si_exp);
936}
937
938static void
939nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
940{
941 if (u->secinfo_no_name.sin_exp)
942 exp_put(u->secinfo_no_name.sin_exp);
943}
944
945static __be32
946nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
947 union nfsd4_op_u *u)
948{
949 struct nfsd4_setattr *setattr = &u->setattr;
950 __be32 status = nfs_ok;
951 int err;
952
953 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
954 status = nfs4_preprocess_stateid_op(rqstp, cstate,
955 &cstate->current_fh, &setattr->sa_stateid,
956 WR_STATE, NULL, NULL);
957 if (status) {
958 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
959 return status;
960 }
961 }
962 err = fh_want_write(&cstate->current_fh);
963 if (err)
964 return nfserrno(err);
965 status = nfs_ok;
966
967 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
968 nfsd_attrmask);
969 if (status)
970 goto out;
971
972 if (setattr->sa_acl != NULL)
973 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
974 setattr->sa_acl);
975 if (status)
976 goto out;
977 if (setattr->sa_label.len)
978 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
979 &setattr->sa_label);
980 if (status)
981 goto out;
982 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
983 0, (time_t)0);
984out:
985 fh_drop_write(&cstate->current_fh);
986 return status;
987}
988
989static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
990{
991 int i = 1;
992 int buflen = write->wr_buflen;
993
994 vec[0].iov_base = write->wr_head.iov_base;
995 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
996 buflen -= vec[0].iov_len;
997
998 while (buflen) {
999 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
1000 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
1001 buflen -= vec[i].iov_len;
1002 i++;
1003 }
1004 return i;
1005}
1006
1007static __be32
1008nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1009 union nfsd4_op_u *u)
1010{
1011 struct nfsd4_write *write = &u->write;
1012 stateid_t *stateid = &write->wr_stateid;
1013 struct file *filp = NULL;
1014 __be32 status = nfs_ok;
1015 unsigned long cnt;
1016 int nvecs;
1017
1018 if (write->wr_offset >= OFFSET_MAX)
1019 return nfserr_inval;
1020
1021 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1022 stateid, WR_STATE, &filp, NULL);
1023 if (status) {
1024 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1025 return status;
1026 }
1027
1028 cnt = write->wr_buflen;
1029 write->wr_how_written = write->wr_stable_how;
1030 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1031
1032 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1033 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1034
1035 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1036 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1037 write->wr_how_written);
1038 fput(filp);
1039
1040 write->wr_bytes_written = cnt;
1041
1042 return status;
1043}
1044
1045static __be32
1046nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1047 stateid_t *src_stateid, struct file **src,
1048 stateid_t *dst_stateid, struct file **dst)
1049{
1050 __be32 status;
1051
1052 if (!cstate->save_fh.fh_dentry)
1053 return nfserr_nofilehandle;
1054
1055 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1056 src_stateid, RD_STATE, src, NULL);
1057 if (status) {
1058 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1059 goto out;
1060 }
1061
1062 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1063 dst_stateid, WR_STATE, dst, NULL);
1064 if (status) {
1065 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1066 goto out_put_src;
1067 }
1068
1069 /* fix up for NFS-specific error code */
1070 if (!S_ISREG(file_inode(*src)->i_mode) ||
1071 !S_ISREG(file_inode(*dst)->i_mode)) {
1072 status = nfserr_wrong_type;
1073 goto out_put_dst;
1074 }
1075
1076out:
1077 return status;
1078out_put_dst:
1079 fput(*dst);
1080out_put_src:
1081 fput(*src);
1082 goto out;
1083}
1084
1085static __be32
1086nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1087 union nfsd4_op_u *u)
1088{
1089 struct nfsd4_clone *clone = &u->clone;
1090 struct file *src, *dst;
1091 __be32 status;
1092
1093 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1094 &clone->cl_dst_stateid, &dst);
1095 if (status)
1096 goto out;
1097
1098 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1099 dst, clone->cl_dst_pos, clone->cl_count);
1100
1101 fput(dst);
1102 fput(src);
1103out:
1104 return status;
1105}
1106
1107static __be32
1108nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1109 union nfsd4_op_u *u)
1110{
1111 struct nfsd4_copy *copy = &u->copy;
1112 struct file *src, *dst;
1113 __be32 status;
1114 ssize_t bytes;
1115
1116 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1117 &copy->cp_dst_stateid, &dst);
1118 if (status)
1119 goto out;
1120
1121 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1122 dst, copy->cp_dst_pos, copy->cp_count);
1123
1124 if (bytes < 0)
1125 status = nfserrno(bytes);
1126 else {
1127 copy->cp_res.wr_bytes_written = bytes;
1128 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1129 copy->cp_consecutive = 1;
1130 copy->cp_synchronous = 1;
1131 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1132 status = nfs_ok;
1133 }
1134
1135 fput(src);
1136 fput(dst);
1137out:
1138 return status;
1139}
1140
1141static __be32
1142nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1143 struct nfsd4_fallocate *fallocate, int flags)
1144{
1145 __be32 status = nfserr_notsupp;
1146 struct file *file;
1147
1148 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1149 &fallocate->falloc_stateid,
1150 WR_STATE, &file, NULL);
1151 if (status != nfs_ok) {
1152 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1153 return status;
1154 }
1155
1156 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1157 fallocate->falloc_offset,
1158 fallocate->falloc_length,
1159 flags);
1160 fput(file);
1161 return status;
1162}
1163
1164static __be32
1165nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1166 union nfsd4_op_u *u)
1167{
1168 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1169}
1170
1171static __be32
1172nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1173 union nfsd4_op_u *u)
1174{
1175 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1176 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1177}
1178
1179static __be32
1180nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1181 union nfsd4_op_u *u)
1182{
1183 struct nfsd4_seek *seek = &u->seek;
1184 int whence;
1185 __be32 status;
1186 struct file *file;
1187
1188 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1189 &seek->seek_stateid,
1190 RD_STATE, &file, NULL);
1191 if (status) {
1192 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1193 return status;
1194 }
1195
1196 switch (seek->seek_whence) {
1197 case NFS4_CONTENT_DATA:
1198 whence = SEEK_DATA;
1199 break;
1200 case NFS4_CONTENT_HOLE:
1201 whence = SEEK_HOLE;
1202 break;
1203 default:
1204 status = nfserr_union_notsupp;
1205 goto out;
1206 }
1207
1208 /*
1209 * Note: This call does change file->f_pos, but nothing in NFSD
1210 * should ever file->f_pos.
1211 */
1212 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1213 if (seek->seek_pos < 0)
1214 status = nfserrno(seek->seek_pos);
1215 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1216 seek->seek_eof = true;
1217
1218out:
1219 fput(file);
1220 return status;
1221}
1222
1223/* This routine never returns NFS_OK! If there are no other errors, it
1224 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1225 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1226 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1227 */
1228static __be32
1229_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1230 struct nfsd4_verify *verify)
1231{
1232 __be32 *buf, *p;
1233 int count;
1234 __be32 status;
1235
1236 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1237 if (status)
1238 return status;
1239
1240 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1241 if (status)
1242 return status;
1243
1244 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1245 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1246 return nfserr_inval;
1247 if (verify->ve_attrlen & 3)
1248 return nfserr_inval;
1249
1250 /* count in words:
1251 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1252 */
1253 count = 4 + (verify->ve_attrlen >> 2);
1254 buf = kmalloc(count << 2, GFP_KERNEL);
1255 if (!buf)
1256 return nfserr_jukebox;
1257
1258 p = buf;
1259 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1260 cstate->current_fh.fh_export,
1261 cstate->current_fh.fh_dentry,
1262 verify->ve_bmval,
1263 rqstp, 0);
1264 /*
1265 * If nfsd4_encode_fattr() ran out of space, assume that's because
1266 * the attributes are longer (hence different) than those given:
1267 */
1268 if (status == nfserr_resource)
1269 status = nfserr_not_same;
1270 if (status)
1271 goto out_kfree;
1272
1273 /* skip bitmap */
1274 p = buf + 1 + ntohl(buf[0]);
1275 status = nfserr_not_same;
1276 if (ntohl(*p++) != verify->ve_attrlen)
1277 goto out_kfree;
1278 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1279 status = nfserr_same;
1280
1281out_kfree:
1282 kfree(buf);
1283 return status;
1284}
1285
1286static __be32
1287nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1288 union nfsd4_op_u *u)
1289{
1290 __be32 status;
1291
1292 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1293 return status == nfserr_not_same ? nfs_ok : status;
1294}
1295
1296static __be32
1297nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1298 union nfsd4_op_u *u)
1299{
1300 __be32 status;
1301
1302 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1303 return status == nfserr_same ? nfs_ok : status;
1304}
1305
1306#ifdef CONFIG_NFSD_PNFS
1307static const struct nfsd4_layout_ops *
1308nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1309{
1310 if (!exp->ex_layout_types) {
1311 dprintk("%s: export does not support pNFS\n", __func__);
1312 return NULL;
1313 }
1314
1315 if (layout_type >= LAYOUT_TYPE_MAX ||
1316 !(exp->ex_layout_types & (1 << layout_type))) {
1317 dprintk("%s: layout type %d not supported\n",
1318 __func__, layout_type);
1319 return NULL;
1320 }
1321
1322 return nfsd4_layout_ops[layout_type];
1323}
1324
1325static __be32
1326nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1327 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1328{
1329 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1330 const struct nfsd4_layout_ops *ops;
1331 struct nfsd4_deviceid_map *map;
1332 struct svc_export *exp;
1333 __be32 nfserr;
1334
1335 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1336 __func__,
1337 gdp->gd_layout_type,
1338 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1339 gdp->gd_maxcount);
1340
1341 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1342 if (!map) {
1343 dprintk("%s: couldn't find device ID to export mapping!\n",
1344 __func__);
1345 return nfserr_noent;
1346 }
1347
1348 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1349 if (IS_ERR(exp)) {
1350 dprintk("%s: could not find device id\n", __func__);
1351 return nfserr_noent;
1352 }
1353
1354 nfserr = nfserr_layoutunavailable;
1355 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1356 if (!ops)
1357 goto out;
1358
1359 nfserr = nfs_ok;
1360 if (gdp->gd_maxcount != 0) {
1361 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1362 rqstp, cstate->session->se_client, gdp);
1363 }
1364
1365 gdp->gd_notify_types &= ops->notify_types;
1366out:
1367 exp_put(exp);
1368 return nfserr;
1369}
1370
1371static void
1372nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1373{
1374 kfree(u->getdeviceinfo.gd_device);
1375}
1376
1377static __be32
1378nfsd4_layoutget(struct svc_rqst *rqstp,
1379 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1380{
1381 struct nfsd4_layoutget *lgp = &u->layoutget;
1382 struct svc_fh *current_fh = &cstate->current_fh;
1383 const struct nfsd4_layout_ops *ops;
1384 struct nfs4_layout_stateid *ls;
1385 __be32 nfserr;
1386 int accmode = NFSD_MAY_READ_IF_EXEC;
1387
1388 switch (lgp->lg_seg.iomode) {
1389 case IOMODE_READ:
1390 accmode |= NFSD_MAY_READ;
1391 break;
1392 case IOMODE_RW:
1393 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1394 break;
1395 default:
1396 dprintk("%s: invalid iomode %d\n",
1397 __func__, lgp->lg_seg.iomode);
1398 nfserr = nfserr_badiomode;
1399 goto out;
1400 }
1401
1402 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1403 if (nfserr)
1404 goto out;
1405
1406 nfserr = nfserr_layoutunavailable;
1407 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1408 if (!ops)
1409 goto out;
1410
1411 /*
1412 * Verify minlength and range as per RFC5661:
1413 * o If loga_length is less than loga_minlength,
1414 * the metadata server MUST return NFS4ERR_INVAL.
1415 * o If the sum of loga_offset and loga_minlength exceeds
1416 * NFS4_UINT64_MAX, and loga_minlength is not
1417 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1418 * o If the sum of loga_offset and loga_length exceeds
1419 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1420 * the error NFS4ERR_INVAL MUST result.
1421 */
1422 nfserr = nfserr_inval;
1423 if (lgp->lg_seg.length < lgp->lg_minlength ||
1424 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1425 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1426 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1427 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1428 goto out;
1429 if (lgp->lg_seg.length == 0)
1430 goto out;
1431
1432 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1433 true, lgp->lg_layout_type, &ls);
1434 if (nfserr) {
1435 trace_layout_get_lookup_fail(&lgp->lg_sid);
1436 goto out;
1437 }
1438
1439 nfserr = nfserr_recallconflict;
1440 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1441 goto out_put_stid;
1442
1443 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1444 current_fh, lgp);
1445 if (nfserr)
1446 goto out_put_stid;
1447
1448 nfserr = nfsd4_insert_layout(lgp, ls);
1449
1450out_put_stid:
1451 mutex_unlock(&ls->ls_mutex);
1452 nfs4_put_stid(&ls->ls_stid);
1453out:
1454 return nfserr;
1455}
1456
1457static void
1458nfsd4_layoutget_release(union nfsd4_op_u *u)
1459{
1460 kfree(u->layoutget.lg_content);
1461}
1462
1463static __be32
1464nfsd4_layoutcommit(struct svc_rqst *rqstp,
1465 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1466{
1467 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1468 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1469 struct svc_fh *current_fh = &cstate->current_fh;
1470 const struct nfsd4_layout_ops *ops;
1471 loff_t new_size = lcp->lc_last_wr + 1;
1472 struct inode *inode;
1473 struct nfs4_layout_stateid *ls;
1474 __be32 nfserr;
1475
1476 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1477 if (nfserr)
1478 goto out;
1479
1480 nfserr = nfserr_layoutunavailable;
1481 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1482 if (!ops)
1483 goto out;
1484 inode = d_inode(current_fh->fh_dentry);
1485
1486 nfserr = nfserr_inval;
1487 if (new_size <= seg->offset) {
1488 dprintk("pnfsd: last write before layout segment\n");
1489 goto out;
1490 }
1491 if (new_size > seg->offset + seg->length) {
1492 dprintk("pnfsd: last write beyond layout segment\n");
1493 goto out;
1494 }
1495 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1496 dprintk("pnfsd: layoutcommit beyond EOF\n");
1497 goto out;
1498 }
1499
1500 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1501 false, lcp->lc_layout_type,
1502 &ls);
1503 if (nfserr) {
1504 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1505 /* fixup error code as per RFC5661 */
1506 if (nfserr == nfserr_bad_stateid)
1507 nfserr = nfserr_badlayout;
1508 goto out;
1509 }
1510
1511 /* LAYOUTCOMMIT does not require any serialization */
1512 mutex_unlock(&ls->ls_mutex);
1513
1514 if (new_size > i_size_read(inode)) {
1515 lcp->lc_size_chg = 1;
1516 lcp->lc_newsize = new_size;
1517 } else {
1518 lcp->lc_size_chg = 0;
1519 }
1520
1521 nfserr = ops->proc_layoutcommit(inode, lcp);
1522 nfs4_put_stid(&ls->ls_stid);
1523out:
1524 return nfserr;
1525}
1526
1527static __be32
1528nfsd4_layoutreturn(struct svc_rqst *rqstp,
1529 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1530{
1531 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1532 struct svc_fh *current_fh = &cstate->current_fh;
1533 __be32 nfserr;
1534
1535 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1536 if (nfserr)
1537 goto out;
1538
1539 nfserr = nfserr_layoutunavailable;
1540 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1541 goto out;
1542
1543 switch (lrp->lr_seg.iomode) {
1544 case IOMODE_READ:
1545 case IOMODE_RW:
1546 case IOMODE_ANY:
1547 break;
1548 default:
1549 dprintk("%s: invalid iomode %d\n", __func__,
1550 lrp->lr_seg.iomode);
1551 nfserr = nfserr_inval;
1552 goto out;
1553 }
1554
1555 switch (lrp->lr_return_type) {
1556 case RETURN_FILE:
1557 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1558 break;
1559 case RETURN_FSID:
1560 case RETURN_ALL:
1561 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1562 break;
1563 default:
1564 dprintk("%s: invalid return_type %d\n", __func__,
1565 lrp->lr_return_type);
1566 nfserr = nfserr_inval;
1567 break;
1568 }
1569out:
1570 return nfserr;
1571}
1572#endif /* CONFIG_NFSD_PNFS */
1573
1574/*
1575 * NULL call.
1576 */
1577static __be32
1578nfsd4_proc_null(struct svc_rqst *rqstp)
1579{
1580 return nfs_ok;
1581}
1582
1583static inline void nfsd4_increment_op_stats(u32 opnum)
1584{
1585 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1586 nfsdstats.nfs4_opcount[opnum]++;
1587}
1588
1589static const struct nfsd4_operation nfsd4_ops[];
1590
1591static const char *nfsd4_op_name(unsigned opnum);
1592
1593/*
1594 * Enforce NFSv4.1 COMPOUND ordering rules:
1595 *
1596 * Also note, enforced elsewhere:
1597 * - SEQUENCE other than as first op results in
1598 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1599 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1600 * (Enforced in nfsd4_bind_conn_to_session().)
1601 * - DESTROY_SESSION must be the final operation in a compound, if
1602 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1603 * (Enforced in nfsd4_destroy_session().)
1604 */
1605static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1606{
1607 struct nfsd4_op *op = &args->ops[0];
1608
1609 /* These ordering requirements don't apply to NFSv4.0: */
1610 if (args->minorversion == 0)
1611 return nfs_ok;
1612 /* This is weird, but OK, not our problem: */
1613 if (args->opcnt == 0)
1614 return nfs_ok;
1615 if (op->status == nfserr_op_illegal)
1616 return nfs_ok;
1617 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1618 return nfserr_op_not_in_session;
1619 if (op->opnum == OP_SEQUENCE)
1620 return nfs_ok;
1621 if (args->opcnt != 1)
1622 return nfserr_not_only_op;
1623 return nfs_ok;
1624}
1625
1626const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1627{
1628 return &nfsd4_ops[op->opnum];
1629}
1630
1631bool nfsd4_cache_this_op(struct nfsd4_op *op)
1632{
1633 if (op->opnum == OP_ILLEGAL)
1634 return false;
1635 return OPDESC(op)->op_flags & OP_CACHEME;
1636}
1637
1638static bool need_wrongsec_check(struct svc_rqst *rqstp)
1639{
1640 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1641 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1642 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1643 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1644 const struct nfsd4_operation *thisd = OPDESC(this);
1645 const struct nfsd4_operation *nextd;
1646
1647 /*
1648 * Most ops check wronsec on our own; only the putfh-like ops
1649 * have special rules.
1650 */
1651 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1652 return false;
1653 /*
1654 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1655 * put-filehandle operation if we're not going to use the
1656 * result:
1657 */
1658 if (argp->opcnt == resp->opcnt)
1659 return false;
1660 if (next->opnum == OP_ILLEGAL)
1661 return false;
1662 nextd = OPDESC(next);
1663 /*
1664 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1665 * errors themselves as necessary; others should check for them
1666 * now:
1667 */
1668 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1669}
1670
1671static void svcxdr_init_encode(struct svc_rqst *rqstp,
1672 struct nfsd4_compoundres *resp)
1673{
1674 struct xdr_stream *xdr = &resp->xdr;
1675 struct xdr_buf *buf = &rqstp->rq_res;
1676 struct kvec *head = buf->head;
1677
1678 xdr->buf = buf;
1679 xdr->iov = head;
1680 xdr->p = head->iov_base + head->iov_len;
1681 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1682 /* Tail and page_len should be zero at this point: */
1683 buf->len = buf->head[0].iov_len;
1684 xdr->scratch.iov_len = 0;
1685 xdr->page_ptr = buf->pages - 1;
1686 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1687 - rqstp->rq_auth_slack;
1688}
1689
1690/*
1691 * COMPOUND call.
1692 */
1693static __be32
1694nfsd4_proc_compound(struct svc_rqst *rqstp)
1695{
1696 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1697 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1698 struct nfsd4_op *op;
1699 struct nfsd4_compound_state *cstate = &resp->cstate;
1700 struct svc_fh *current_fh = &cstate->current_fh;
1701 struct svc_fh *save_fh = &cstate->save_fh;
1702 __be32 status;
1703
1704 svcxdr_init_encode(rqstp, resp);
1705 resp->tagp = resp->xdr.p;
1706 /* reserve space for: taglen, tag, and opcnt */
1707 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1708 resp->taglen = args->taglen;
1709 resp->tag = args->tag;
1710 resp->rqstp = rqstp;
1711 cstate->minorversion = args->minorversion;
1712 fh_init(current_fh, NFS4_FHSIZE);
1713 fh_init(save_fh, NFS4_FHSIZE);
1714 /*
1715 * Don't use the deferral mechanism for NFSv4; compounds make it
1716 * too hard to avoid non-idempotency problems.
1717 */
1718 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1719
1720 /*
1721 * According to RFC3010, this takes precedence over all other errors.
1722 */
1723 status = nfserr_minor_vers_mismatch;
1724 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1725 goto out;
1726
1727 status = nfs41_check_op_ordering(args);
1728 if (status) {
1729 op = &args->ops[0];
1730 op->status = status;
1731 resp->opcnt = 1;
1732 goto encode_op;
1733 }
1734
1735 while (!status && resp->opcnt < args->opcnt) {
1736 op = &args->ops[resp->opcnt++];
1737
1738 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1739 resp->opcnt, args->opcnt, op->opnum,
1740 nfsd4_op_name(op->opnum));
1741 /*
1742 * The XDR decode routines may have pre-set op->status;
1743 * for example, if there is a miscellaneous XDR error
1744 * it will be set to nfserr_bad_xdr.
1745 */
1746 if (op->status) {
1747 if (op->opnum == OP_OPEN)
1748 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1749 goto encode_op;
1750 }
1751
1752 if (!current_fh->fh_dentry) {
1753 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1754 op->status = nfserr_nofilehandle;
1755 goto encode_op;
1756 }
1757 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1758 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1759 op->status = nfserr_moved;
1760 goto encode_op;
1761 }
1762
1763 fh_clear_wcc(current_fh);
1764
1765 /* If op is non-idempotent */
1766 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1767 /*
1768 * Don't execute this op if we couldn't encode a
1769 * succesful reply:
1770 */
1771 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
1772 /*
1773 * Plus if there's another operation, make sure
1774 * we'll have space to at least encode an error:
1775 */
1776 if (resp->opcnt < args->opcnt)
1777 plen += COMPOUND_ERR_SLACK_SPACE;
1778 op->status = nfsd4_check_resp_size(resp, plen);
1779 }
1780
1781 if (op->status)
1782 goto encode_op;
1783
1784 if (op->opdesc->op_get_currentstateid)
1785 op->opdesc->op_get_currentstateid(cstate, &op->u);
1786 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1787
1788 /* Only from SEQUENCE */
1789 if (cstate->status == nfserr_replay_cache) {
1790 dprintk("%s NFS4.1 replay from cache\n", __func__);
1791 status = op->status;
1792 goto out;
1793 }
1794 if (!op->status) {
1795 if (op->opdesc->op_set_currentstateid)
1796 op->opdesc->op_set_currentstateid(cstate, &op->u);
1797
1798 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
1799 clear_current_stateid(cstate);
1800
1801 if (need_wrongsec_check(rqstp))
1802 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1803 }
1804encode_op:
1805 if (op->status == nfserr_replay_me) {
1806 op->replay = &cstate->replay_owner->so_replay;
1807 nfsd4_encode_replay(&resp->xdr, op);
1808 status = op->status = op->replay->rp_status;
1809 } else {
1810 nfsd4_encode_operation(resp, op);
1811 status = op->status;
1812 }
1813
1814 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1815 args->ops, args->opcnt, resp->opcnt, op->opnum,
1816 be32_to_cpu(status));
1817
1818 nfsd4_cstate_clear_replay(cstate);
1819 nfsd4_increment_op_stats(op->opnum);
1820 }
1821
1822 cstate->status = status;
1823 fh_put(current_fh);
1824 fh_put(save_fh);
1825 BUG_ON(cstate->replay_owner);
1826out:
1827 /* Reset deferral mechanism for RPC deferrals */
1828 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1829 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1830 return status;
1831}
1832
1833#define op_encode_hdr_size (2)
1834#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1835#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1836#define op_encode_change_info_maxsz (5)
1837#define nfs4_fattr_bitmap_maxsz (4)
1838
1839/* We'll fall back on returning no lockowner if run out of space: */
1840#define op_encode_lockowner_maxsz (0)
1841#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1842
1843#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1844
1845#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1846#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1847 op_encode_ace_maxsz)
1848
1849#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1850
1851static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1852{
1853 return (op_encode_hdr_size) * sizeof(__be32);
1854}
1855
1856static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1857{
1858 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1859}
1860
1861static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1862{
1863 /* ac_supported, ac_resp_access */
1864 return (op_encode_hdr_size + 2)* sizeof(__be32);
1865}
1866
1867static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1868{
1869 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1870}
1871
1872static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1873{
1874 return (op_encode_hdr_size + op_encode_change_info_maxsz
1875 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1876}
1877
1878/*
1879 * Note since this is an idempotent operation we won't insist on failing
1880 * the op prematurely if the estimate is too large. We may turn off splice
1881 * reads unnecessarily.
1882 */
1883static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1884 struct nfsd4_op *op)
1885{
1886 u32 *bmap = op->u.getattr.ga_bmval;
1887 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1888 u32 ret = 0;
1889
1890 if (bmap0 & FATTR4_WORD0_ACL)
1891 return svc_max_payload(rqstp);
1892 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1893 return svc_max_payload(rqstp);
1894
1895 if (bmap1 & FATTR4_WORD1_OWNER) {
1896 ret += IDMAP_NAMESZ + 4;
1897 bmap1 &= ~FATTR4_WORD1_OWNER;
1898 }
1899 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1900 ret += IDMAP_NAMESZ + 4;
1901 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1902 }
1903 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1904 ret += NFS4_FHSIZE + 4;
1905 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1906 }
1907 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1908 ret += NFS4_MAXLABELLEN + 12;
1909 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1910 }
1911 /*
1912 * Largest of remaining attributes are 16 bytes (e.g.,
1913 * supported_attributes)
1914 */
1915 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1916 /* bitmask, length */
1917 ret += 20;
1918 return ret;
1919}
1920
1921static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1922{
1923 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1924}
1925
1926static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1927{
1928 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1929 * sizeof(__be32);
1930}
1931
1932static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1933{
1934 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1935 * sizeof(__be32);
1936}
1937
1938static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1939{
1940 return (op_encode_hdr_size + op_encode_stateid_maxsz
1941 + op_encode_change_info_maxsz + 1
1942 + nfs4_fattr_bitmap_maxsz
1943 + op_encode_delegation_maxsz) * sizeof(__be32);
1944}
1945
1946static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1947{
1948 u32 maxcount = 0, rlen = 0;
1949
1950 maxcount = svc_max_payload(rqstp);
1951 rlen = min(op->u.read.rd_length, maxcount);
1952
1953 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1954}
1955
1956static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1957{
1958 u32 maxcount = 0, rlen = 0;
1959
1960 maxcount = svc_max_payload(rqstp);
1961 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1962
1963 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1964 XDR_QUADLEN(rlen)) * sizeof(__be32);
1965}
1966
1967static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1968{
1969 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1970}
1971
1972static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1973{
1974 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1975 * sizeof(__be32);
1976}
1977
1978static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1979{
1980 return (op_encode_hdr_size + op_encode_change_info_maxsz
1981 + op_encode_change_info_maxsz) * sizeof(__be32);
1982}
1983
1984static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1985 struct nfsd4_op *op)
1986{
1987 return (op_encode_hdr_size
1988 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1989}
1990
1991static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1992{
1993 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1994 * sizeof(__be32);
1995}
1996
1997static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1998{
1999 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2000}
2001
2002static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2003{
2004 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2005 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2006}
2007
2008static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2009{
2010 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2011 sizeof(__be32);
2012}
2013
2014static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2015{
2016 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2017}
2018
2019static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2022 1 + 1 + /* eir_flags, spr_how */\
2023 4 + /* spo_must_enforce & _allow with bitmap */\
2024 2 + /*eir_server_owner.so_minor_id */\
2025 /* eir_server_owner.so_major_id<> */\
2026 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2027 /* eir_server_scope<> */\
2028 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2029 1 + /* eir_server_impl_id array length */\
2030 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2031}
2032
2033static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2034{
2035 return (op_encode_hdr_size + \
2036 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2037 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2038}
2039
2040static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2041{
2042 return (op_encode_hdr_size + \
2043 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2044 2 + /* csr_sequence, csr_flags */\
2045 op_encode_channel_attrs_maxsz + \
2046 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2047}
2048
2049static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2050{
2051 return (op_encode_hdr_size +
2052 1 /* wr_callback */ +
2053 op_encode_stateid_maxsz /* wr_callback */ +
2054 2 /* wr_count */ +
2055 1 /* wr_committed */ +
2056 op_encode_verifier_maxsz +
2057 1 /* cr_consecutive */ +
2058 1 /* cr_synchronous */) * sizeof(__be32);
2059}
2060
2061#ifdef CONFIG_NFSD_PNFS
2062static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2063{
2064 u32 maxcount = 0, rlen = 0;
2065
2066 maxcount = svc_max_payload(rqstp);
2067 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2068
2069 return (op_encode_hdr_size +
2070 1 /* gd_layout_type*/ +
2071 XDR_QUADLEN(rlen) +
2072 2 /* gd_notify_types */) * sizeof(__be32);
2073}
2074
2075/*
2076 * At this stage we don't really know what layout driver will handle the request,
2077 * so we need to define an arbitrary upper bound here.
2078 */
2079#define MAX_LAYOUT_SIZE 128
2080static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2081{
2082 return (op_encode_hdr_size +
2083 1 /* logr_return_on_close */ +
2084 op_encode_stateid_maxsz +
2085 1 /* nr of layouts */ +
2086 MAX_LAYOUT_SIZE) * sizeof(__be32);
2087}
2088
2089static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2090{
2091 return (op_encode_hdr_size +
2092 1 /* locr_newsize */ +
2093 2 /* ns_size */) * sizeof(__be32);
2094}
2095
2096static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2097{
2098 return (op_encode_hdr_size +
2099 1 /* lrs_stateid */ +
2100 op_encode_stateid_maxsz) * sizeof(__be32);
2101}
2102#endif /* CONFIG_NFSD_PNFS */
2103
2104
2105static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2106{
2107 return (op_encode_hdr_size + 3) * sizeof(__be32);
2108}
2109
2110static const struct nfsd4_operation nfsd4_ops[] = {
2111 [OP_ACCESS] = {
2112 .op_func = nfsd4_access,
2113 .op_name = "OP_ACCESS",
2114 .op_rsize_bop = nfsd4_access_rsize,
2115 },
2116 [OP_CLOSE] = {
2117 .op_func = nfsd4_close,
2118 .op_flags = OP_MODIFIES_SOMETHING,
2119 .op_name = "OP_CLOSE",
2120 .op_rsize_bop = nfsd4_status_stateid_rsize,
2121 .op_get_currentstateid = nfsd4_get_closestateid,
2122 .op_set_currentstateid = nfsd4_set_closestateid,
2123 },
2124 [OP_COMMIT] = {
2125 .op_func = nfsd4_commit,
2126 .op_flags = OP_MODIFIES_SOMETHING,
2127 .op_name = "OP_COMMIT",
2128 .op_rsize_bop = nfsd4_commit_rsize,
2129 },
2130 [OP_CREATE] = {
2131 .op_func = nfsd4_create,
2132 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2133 .op_name = "OP_CREATE",
2134 .op_rsize_bop = nfsd4_create_rsize,
2135 },
2136 [OP_DELEGRETURN] = {
2137 .op_func = nfsd4_delegreturn,
2138 .op_flags = OP_MODIFIES_SOMETHING,
2139 .op_name = "OP_DELEGRETURN",
2140 .op_rsize_bop = nfsd4_only_status_rsize,
2141 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2142 },
2143 [OP_GETATTR] = {
2144 .op_func = nfsd4_getattr,
2145 .op_flags = ALLOWED_ON_ABSENT_FS,
2146 .op_rsize_bop = nfsd4_getattr_rsize,
2147 .op_name = "OP_GETATTR",
2148 },
2149 [OP_GETFH] = {
2150 .op_func = nfsd4_getfh,
2151 .op_name = "OP_GETFH",
2152 .op_rsize_bop = nfsd4_getfh_rsize,
2153 },
2154 [OP_LINK] = {
2155 .op_func = nfsd4_link,
2156 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2157 | OP_CACHEME,
2158 .op_name = "OP_LINK",
2159 .op_rsize_bop = nfsd4_link_rsize,
2160 },
2161 [OP_LOCK] = {
2162 .op_func = nfsd4_lock,
2163 .op_flags = OP_MODIFIES_SOMETHING |
2164 OP_NONTRIVIAL_ERROR_ENCODE,
2165 .op_name = "OP_LOCK",
2166 .op_rsize_bop = nfsd4_lock_rsize,
2167 .op_set_currentstateid = nfsd4_set_lockstateid,
2168 },
2169 [OP_LOCKT] = {
2170 .op_func = nfsd4_lockt,
2171 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2172 .op_name = "OP_LOCKT",
2173 .op_rsize_bop = nfsd4_lock_rsize,
2174 },
2175 [OP_LOCKU] = {
2176 .op_func = nfsd4_locku,
2177 .op_flags = OP_MODIFIES_SOMETHING,
2178 .op_name = "OP_LOCKU",
2179 .op_rsize_bop = nfsd4_status_stateid_rsize,
2180 .op_get_currentstateid = nfsd4_get_lockustateid,
2181 },
2182 [OP_LOOKUP] = {
2183 .op_func = nfsd4_lookup,
2184 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2185 .op_name = "OP_LOOKUP",
2186 .op_rsize_bop = nfsd4_only_status_rsize,
2187 },
2188 [OP_LOOKUPP] = {
2189 .op_func = nfsd4_lookupp,
2190 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2191 .op_name = "OP_LOOKUPP",
2192 .op_rsize_bop = nfsd4_only_status_rsize,
2193 },
2194 [OP_NVERIFY] = {
2195 .op_func = nfsd4_nverify,
2196 .op_name = "OP_NVERIFY",
2197 .op_rsize_bop = nfsd4_only_status_rsize,
2198 },
2199 [OP_OPEN] = {
2200 .op_func = nfsd4_open,
2201 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2202 .op_name = "OP_OPEN",
2203 .op_rsize_bop = nfsd4_open_rsize,
2204 .op_set_currentstateid = nfsd4_set_openstateid,
2205 },
2206 [OP_OPEN_CONFIRM] = {
2207 .op_func = nfsd4_open_confirm,
2208 .op_flags = OP_MODIFIES_SOMETHING,
2209 .op_name = "OP_OPEN_CONFIRM",
2210 .op_rsize_bop = nfsd4_status_stateid_rsize,
2211 },
2212 [OP_OPEN_DOWNGRADE] = {
2213 .op_func = nfsd4_open_downgrade,
2214 .op_flags = OP_MODIFIES_SOMETHING,
2215 .op_name = "OP_OPEN_DOWNGRADE",
2216 .op_rsize_bop = nfsd4_status_stateid_rsize,
2217 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2218 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2219 },
2220 [OP_PUTFH] = {
2221 .op_func = nfsd4_putfh,
2222 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2223 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2224 .op_name = "OP_PUTFH",
2225 .op_rsize_bop = nfsd4_only_status_rsize,
2226 },
2227 [OP_PUTPUBFH] = {
2228 .op_func = nfsd4_putrootfh,
2229 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2230 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2231 .op_name = "OP_PUTPUBFH",
2232 .op_rsize_bop = nfsd4_only_status_rsize,
2233 },
2234 [OP_PUTROOTFH] = {
2235 .op_func = nfsd4_putrootfh,
2236 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2237 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2238 .op_name = "OP_PUTROOTFH",
2239 .op_rsize_bop = nfsd4_only_status_rsize,
2240 },
2241 [OP_READ] = {
2242 .op_func = nfsd4_read,
2243 .op_release = nfsd4_read_release,
2244 .op_name = "OP_READ",
2245 .op_rsize_bop = nfsd4_read_rsize,
2246 .op_get_currentstateid = nfsd4_get_readstateid,
2247 },
2248 [OP_READDIR] = {
2249 .op_func = nfsd4_readdir,
2250 .op_name = "OP_READDIR",
2251 .op_rsize_bop = nfsd4_readdir_rsize,
2252 },
2253 [OP_READLINK] = {
2254 .op_func = nfsd4_readlink,
2255 .op_name = "OP_READLINK",
2256 .op_rsize_bop = nfsd4_readlink_rsize,
2257 },
2258 [OP_REMOVE] = {
2259 .op_func = nfsd4_remove,
2260 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2261 .op_name = "OP_REMOVE",
2262 .op_rsize_bop = nfsd4_remove_rsize,
2263 },
2264 [OP_RENAME] = {
2265 .op_func = nfsd4_rename,
2266 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2267 .op_name = "OP_RENAME",
2268 .op_rsize_bop = nfsd4_rename_rsize,
2269 },
2270 [OP_RENEW] = {
2271 .op_func = nfsd4_renew,
2272 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2273 | OP_MODIFIES_SOMETHING,
2274 .op_name = "OP_RENEW",
2275 .op_rsize_bop = nfsd4_only_status_rsize,
2276
2277 },
2278 [OP_RESTOREFH] = {
2279 .op_func = nfsd4_restorefh,
2280 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2281 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2282 .op_name = "OP_RESTOREFH",
2283 .op_rsize_bop = nfsd4_only_status_rsize,
2284 },
2285 [OP_SAVEFH] = {
2286 .op_func = nfsd4_savefh,
2287 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2288 .op_name = "OP_SAVEFH",
2289 .op_rsize_bop = nfsd4_only_status_rsize,
2290 },
2291 [OP_SECINFO] = {
2292 .op_func = nfsd4_secinfo,
2293 .op_release = nfsd4_secinfo_release,
2294 .op_flags = OP_HANDLES_WRONGSEC,
2295 .op_name = "OP_SECINFO",
2296 .op_rsize_bop = nfsd4_secinfo_rsize,
2297 },
2298 [OP_SETATTR] = {
2299 .op_func = nfsd4_setattr,
2300 .op_name = "OP_SETATTR",
2301 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2302 | OP_NONTRIVIAL_ERROR_ENCODE,
2303 .op_rsize_bop = nfsd4_setattr_rsize,
2304 .op_get_currentstateid = nfsd4_get_setattrstateid,
2305 },
2306 [OP_SETCLIENTID] = {
2307 .op_func = nfsd4_setclientid,
2308 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2309 | OP_MODIFIES_SOMETHING | OP_CACHEME
2310 | OP_NONTRIVIAL_ERROR_ENCODE,
2311 .op_name = "OP_SETCLIENTID",
2312 .op_rsize_bop = nfsd4_setclientid_rsize,
2313 },
2314 [OP_SETCLIENTID_CONFIRM] = {
2315 .op_func = nfsd4_setclientid_confirm,
2316 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2317 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2318 .op_name = "OP_SETCLIENTID_CONFIRM",
2319 .op_rsize_bop = nfsd4_only_status_rsize,
2320 },
2321 [OP_VERIFY] = {
2322 .op_func = nfsd4_verify,
2323 .op_name = "OP_VERIFY",
2324 .op_rsize_bop = nfsd4_only_status_rsize,
2325 },
2326 [OP_WRITE] = {
2327 .op_func = nfsd4_write,
2328 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2329 .op_name = "OP_WRITE",
2330 .op_rsize_bop = nfsd4_write_rsize,
2331 .op_get_currentstateid = nfsd4_get_writestateid,
2332 },
2333 [OP_RELEASE_LOCKOWNER] = {
2334 .op_func = nfsd4_release_lockowner,
2335 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2336 | OP_MODIFIES_SOMETHING,
2337 .op_name = "OP_RELEASE_LOCKOWNER",
2338 .op_rsize_bop = nfsd4_only_status_rsize,
2339 },
2340
2341 /* NFSv4.1 operations */
2342 [OP_EXCHANGE_ID] = {
2343 .op_func = nfsd4_exchange_id,
2344 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2345 | OP_MODIFIES_SOMETHING,
2346 .op_name = "OP_EXCHANGE_ID",
2347 .op_rsize_bop = nfsd4_exchange_id_rsize,
2348 },
2349 [OP_BACKCHANNEL_CTL] = {
2350 .op_func = nfsd4_backchannel_ctl,
2351 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2352 .op_name = "OP_BACKCHANNEL_CTL",
2353 .op_rsize_bop = nfsd4_only_status_rsize,
2354 },
2355 [OP_BIND_CONN_TO_SESSION] = {
2356 .op_func = nfsd4_bind_conn_to_session,
2357 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2358 | OP_MODIFIES_SOMETHING,
2359 .op_name = "OP_BIND_CONN_TO_SESSION",
2360 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2361 },
2362 [OP_CREATE_SESSION] = {
2363 .op_func = nfsd4_create_session,
2364 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2365 | OP_MODIFIES_SOMETHING,
2366 .op_name = "OP_CREATE_SESSION",
2367 .op_rsize_bop = nfsd4_create_session_rsize,
2368 },
2369 [OP_DESTROY_SESSION] = {
2370 .op_func = nfsd4_destroy_session,
2371 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2372 | OP_MODIFIES_SOMETHING,
2373 .op_name = "OP_DESTROY_SESSION",
2374 .op_rsize_bop = nfsd4_only_status_rsize,
2375 },
2376 [OP_SEQUENCE] = {
2377 .op_func = nfsd4_sequence,
2378 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2379 .op_name = "OP_SEQUENCE",
2380 .op_rsize_bop = nfsd4_sequence_rsize,
2381 },
2382 [OP_DESTROY_CLIENTID] = {
2383 .op_func = nfsd4_destroy_clientid,
2384 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2385 | OP_MODIFIES_SOMETHING,
2386 .op_name = "OP_DESTROY_CLIENTID",
2387 .op_rsize_bop = nfsd4_only_status_rsize,
2388 },
2389 [OP_RECLAIM_COMPLETE] = {
2390 .op_func = nfsd4_reclaim_complete,
2391 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2392 .op_name = "OP_RECLAIM_COMPLETE",
2393 .op_rsize_bop = nfsd4_only_status_rsize,
2394 },
2395 [OP_SECINFO_NO_NAME] = {
2396 .op_func = nfsd4_secinfo_no_name,
2397 .op_release = nfsd4_secinfo_no_name_release,
2398 .op_flags = OP_HANDLES_WRONGSEC,
2399 .op_name = "OP_SECINFO_NO_NAME",
2400 .op_rsize_bop = nfsd4_secinfo_rsize,
2401 },
2402 [OP_TEST_STATEID] = {
2403 .op_func = nfsd4_test_stateid,
2404 .op_flags = ALLOWED_WITHOUT_FH,
2405 .op_name = "OP_TEST_STATEID",
2406 .op_rsize_bop = nfsd4_test_stateid_rsize,
2407 },
2408 [OP_FREE_STATEID] = {
2409 .op_func = nfsd4_free_stateid,
2410 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2411 .op_name = "OP_FREE_STATEID",
2412 .op_get_currentstateid = nfsd4_get_freestateid,
2413 .op_rsize_bop = nfsd4_only_status_rsize,
2414 },
2415#ifdef CONFIG_NFSD_PNFS
2416 [OP_GETDEVICEINFO] = {
2417 .op_func = nfsd4_getdeviceinfo,
2418 .op_release = nfsd4_getdeviceinfo_release,
2419 .op_flags = ALLOWED_WITHOUT_FH,
2420 .op_name = "OP_GETDEVICEINFO",
2421 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2422 },
2423 [OP_LAYOUTGET] = {
2424 .op_func = nfsd4_layoutget,
2425 .op_release = nfsd4_layoutget_release,
2426 .op_flags = OP_MODIFIES_SOMETHING,
2427 .op_name = "OP_LAYOUTGET",
2428 .op_rsize_bop = nfsd4_layoutget_rsize,
2429 },
2430 [OP_LAYOUTCOMMIT] = {
2431 .op_func = nfsd4_layoutcommit,
2432 .op_flags = OP_MODIFIES_SOMETHING,
2433 .op_name = "OP_LAYOUTCOMMIT",
2434 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2435 },
2436 [OP_LAYOUTRETURN] = {
2437 .op_func = nfsd4_layoutreturn,
2438 .op_flags = OP_MODIFIES_SOMETHING,
2439 .op_name = "OP_LAYOUTRETURN",
2440 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2441 },
2442#endif /* CONFIG_NFSD_PNFS */
2443
2444 /* NFSv4.2 operations */
2445 [OP_ALLOCATE] = {
2446 .op_func = nfsd4_allocate,
2447 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2448 .op_name = "OP_ALLOCATE",
2449 .op_rsize_bop = nfsd4_only_status_rsize,
2450 },
2451 [OP_DEALLOCATE] = {
2452 .op_func = nfsd4_deallocate,
2453 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2454 .op_name = "OP_DEALLOCATE",
2455 .op_rsize_bop = nfsd4_only_status_rsize,
2456 },
2457 [OP_CLONE] = {
2458 .op_func = nfsd4_clone,
2459 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2460 .op_name = "OP_CLONE",
2461 .op_rsize_bop = nfsd4_only_status_rsize,
2462 },
2463 [OP_COPY] = {
2464 .op_func = nfsd4_copy,
2465 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2466 .op_name = "OP_COPY",
2467 .op_rsize_bop = nfsd4_copy_rsize,
2468 },
2469 [OP_SEEK] = {
2470 .op_func = nfsd4_seek,
2471 .op_name = "OP_SEEK",
2472 .op_rsize_bop = nfsd4_seek_rsize,
2473 },
2474};
2475
2476/**
2477 * nfsd4_spo_must_allow - Determine if the compound op contains an
2478 * operation that is allowed to be sent with machine credentials
2479 *
2480 * @rqstp: a pointer to the struct svc_rqst
2481 *
2482 * Checks to see if the compound contains a spo_must_allow op
2483 * and confirms that it was sent with the proper machine creds.
2484 */
2485
2486bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2487{
2488 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2489 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2490 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2491 struct nfsd4_compound_state *cstate = &resp->cstate;
2492 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2493 u32 opiter;
2494
2495 if (!cstate->minorversion)
2496 return false;
2497
2498 if (cstate->spo_must_allowed == true)
2499 return true;
2500
2501 opiter = resp->opcnt;
2502 while (opiter < argp->opcnt) {
2503 this = &argp->ops[opiter++];
2504 if (test_bit(this->opnum, allow->u.longs) &&
2505 cstate->clp->cl_mach_cred &&
2506 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2507 cstate->spo_must_allowed = true;
2508 return true;
2509 }
2510 }
2511 cstate->spo_must_allowed = false;
2512 return false;
2513}
2514
2515int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2516{
2517 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2518 return op_encode_hdr_size * sizeof(__be32);
2519
2520 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2521 return OPDESC(op)->op_rsize_bop(rqstp, op);
2522}
2523
2524void warn_on_nonidempotent_op(struct nfsd4_op *op)
2525{
2526 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2527 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2528 op->opnum, nfsd4_op_name(op->opnum));
2529 WARN_ON_ONCE(1);
2530 }
2531}
2532
2533static const char *nfsd4_op_name(unsigned opnum)
2534{
2535 if (opnum < ARRAY_SIZE(nfsd4_ops))
2536 return nfsd4_ops[opnum].op_name;
2537 return "unknown_operation";
2538}
2539
2540#define nfsd4_voidres nfsd4_voidargs
2541struct nfsd4_voidargs { int dummy; };
2542
2543static const struct svc_procedure nfsd_procedures4[2] = {
2544 [NFSPROC4_NULL] = {
2545 .pc_func = nfsd4_proc_null,
2546 .pc_encode = nfs4svc_encode_voidres,
2547 .pc_argsize = sizeof(struct nfsd4_voidargs),
2548 .pc_ressize = sizeof(struct nfsd4_voidres),
2549 .pc_cachetype = RC_NOCACHE,
2550 .pc_xdrressize = 1,
2551 },
2552 [NFSPROC4_COMPOUND] = {
2553 .pc_func = nfsd4_proc_compound,
2554 .pc_decode = nfs4svc_decode_compoundargs,
2555 .pc_encode = nfs4svc_encode_compoundres,
2556 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2557 .pc_ressize = sizeof(struct nfsd4_compoundres),
2558 .pc_release = nfsd4_release_compoundargs,
2559 .pc_cachetype = RC_NOCACHE,
2560 .pc_xdrressize = NFSD_BUFSIZE/4,
2561 },
2562};
2563
2564static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2565const struct svc_version nfsd_version4 = {
2566 .vs_vers = 4,
2567 .vs_nproc = 2,
2568 .vs_proc = nfsd_procedures4,
2569 .vs_count = nfsd_count3,
2570 .vs_dispatch = nfsd_dispatch,
2571 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2572 .vs_rpcb_optnl = true,
2573 .vs_need_cong_ctrl = true,
2574};
2575
2576/*
2577 * Local variables:
2578 * c-basic-offset: 8
2579 * End:
2580 */