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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#include <linux/sunrpc/addr.h>
41
42#include "idmap.h"
43#include "cache.h"
44#include "xdr4.h"
45#include "vfs.h"
46#include "current_stateid.h"
47#include "netns.h"
48#include "acl.h"
49#include "pnfs.h"
50#include "trace.h"
51
52#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
53#include <linux/security.h>
54
55static inline void
56nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
57{
58 struct inode *inode = d_inode(resfh->fh_dentry);
59 int status;
60
61 inode_lock(inode);
62 status = security_inode_setsecctx(resfh->fh_dentry,
63 label->data, label->len);
64 inode_unlock(inode);
65
66 if (status)
67 /*
68 * XXX: We should really fail the whole open, but we may
69 * already have created a new file, so it may be too
70 * late. For now this seems the least of evils:
71 */
72 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
73
74 return;
75}
76#else
77static inline void
78nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
79{ }
80#endif
81
82#define NFSDDBG_FACILITY NFSDDBG_PROC
83
84static u32 nfsd_attrmask[] = {
85 NFSD_WRITEABLE_ATTRS_WORD0,
86 NFSD_WRITEABLE_ATTRS_WORD1,
87 NFSD_WRITEABLE_ATTRS_WORD2
88};
89
90static u32 nfsd41_ex_attrmask[] = {
91 NFSD_SUPPATTR_EXCLCREAT_WORD0,
92 NFSD_SUPPATTR_EXCLCREAT_WORD1,
93 NFSD_SUPPATTR_EXCLCREAT_WORD2
94};
95
96static __be32
97check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
98 u32 *bmval, u32 *writable)
99{
100 struct dentry *dentry = cstate->current_fh.fh_dentry;
101 struct svc_export *exp = cstate->current_fh.fh_export;
102
103 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
104 return nfserr_attrnotsupp;
105 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
106 return nfserr_attrnotsupp;
107 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
108 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
109 return nfserr_attrnotsupp;
110 if (writable && !bmval_is_subset(bmval, writable))
111 return nfserr_inval;
112 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
113 (bmval[1] & FATTR4_WORD1_MODE))
114 return nfserr_inval;
115 return nfs_ok;
116}
117
118static __be32
119nfsd4_check_open_attributes(struct svc_rqst *rqstp,
120 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
121{
122 __be32 status = nfs_ok;
123
124 if (open->op_create == NFS4_OPEN_CREATE) {
125 if (open->op_createmode == NFS4_CREATE_UNCHECKED
126 || open->op_createmode == NFS4_CREATE_GUARDED)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd_attrmask);
129 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
130 status = check_attr_support(rqstp, cstate,
131 open->op_bmval, nfsd41_ex_attrmask);
132 }
133
134 return status;
135}
136
137static int
138is_create_with_attrs(struct nfsd4_open *open)
139{
140 return open->op_create == NFS4_OPEN_CREATE
141 && (open->op_createmode == NFS4_CREATE_UNCHECKED
142 || open->op_createmode == NFS4_CREATE_GUARDED
143 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
144}
145
146/*
147 * if error occurs when setting the acl, just clear the acl bit
148 * in the returned attr bitmap.
149 */
150static void
151do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
152 struct nfs4_acl *acl, u32 *bmval)
153{
154 __be32 status;
155
156 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
157 if (status)
158 /*
159 * We should probably fail the whole open at this point,
160 * but we've already created the file, so it's too late;
161 * So this seems the least of evils:
162 */
163 bmval[0] &= ~FATTR4_WORD0_ACL;
164}
165
166static inline void
167fh_dup2(struct svc_fh *dst, struct svc_fh *src)
168{
169 fh_put(dst);
170 dget(src->fh_dentry);
171 if (src->fh_export)
172 exp_get(src->fh_export);
173 *dst = *src;
174}
175
176static __be32
177do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
178{
179 __be32 status;
180
181 if (open->op_truncate &&
182 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
183 return nfserr_inval;
184
185 accmode |= NFSD_MAY_READ_IF_EXEC;
186
187 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
188 accmode |= NFSD_MAY_READ;
189 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
190 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
191 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
192 accmode |= NFSD_MAY_WRITE;
193
194 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
195
196 return status;
197}
198
199static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
200{
201 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
202
203 if (S_ISREG(mode))
204 return nfs_ok;
205 if (S_ISDIR(mode))
206 return nfserr_isdir;
207 /*
208 * Using err_symlink as our catch-all case may look odd; but
209 * there's no other obvious error for this case in 4.0, and we
210 * happen to know that it will cause the linux v4 client to do
211 * the right thing on attempts to open something other than a
212 * regular file.
213 */
214 return nfserr_symlink;
215}
216
217static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
218{
219 if (nfsd4_has_session(cstate))
220 return;
221 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
222 &resfh->fh_handle);
223}
224
225static __be32
226do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
227{
228 struct svc_fh *current_fh = &cstate->current_fh;
229 int accmode;
230 __be32 status;
231
232 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
233 if (!*resfh)
234 return nfserr_jukebox;
235 fh_init(*resfh, NFS4_FHSIZE);
236 open->op_truncate = false;
237
238 if (open->op_create) {
239 /* FIXME: check session persistence and pnfs flags.
240 * The nfsv4.1 spec requires the following semantics:
241 *
242 * Persistent | pNFS | Server REQUIRED | Client Allowed
243 * Reply Cache | server | |
244 * -------------+--------+-----------------+--------------------
245 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
246 * | | | (SHOULD)
247 * | | and EXCLUSIVE4 | or EXCLUSIVE4
248 * | | | (SHOULD NOT)
249 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
250 * yes | no | GUARDED4 | GUARDED4
251 * yes | yes | GUARDED4 | GUARDED4
252 */
253
254 /*
255 * Note: create modes (UNCHECKED,GUARDED...) are the same
256 * in NFSv4 as in v3 except EXCLUSIVE4_1.
257 */
258 current->fs->umask = open->op_umask;
259 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
260 open->op_fname.len, &open->op_iattr,
261 *resfh, open->op_createmode,
262 (u32 *)open->op_verf.data,
263 &open->op_truncate, &open->op_created);
264 current->fs->umask = 0;
265
266 if (!status && open->op_label.len)
267 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
268
269 /*
270 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
271 * use the returned bitmask to indicate which attributes
272 * we used to store the verifier:
273 */
274 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
275 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
276 FATTR4_WORD1_TIME_MODIFY);
277 } else
278 /*
279 * Note this may exit with the parent still locked.
280 * We will hold the lock until nfsd4_open's final
281 * lookup, to prevent renames or unlinks until we've had
282 * a chance to an acquire a delegation if appropriate.
283 */
284 status = nfsd_lookup(rqstp, current_fh,
285 open->op_fname.data, open->op_fname.len, *resfh);
286 if (status)
287 goto out;
288 status = nfsd_check_obj_isreg(*resfh);
289 if (status)
290 goto out;
291
292 if (is_create_with_attrs(open) && open->op_acl != NULL)
293 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
294
295 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
296 accmode = NFSD_MAY_NOP;
297 if (open->op_created ||
298 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
299 accmode |= NFSD_MAY_OWNER_OVERRIDE;
300 status = do_open_permission(rqstp, *resfh, open, accmode);
301 set_change_info(&open->op_cinfo, current_fh);
302out:
303 return status;
304}
305
306static __be32
307do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
308{
309 struct svc_fh *current_fh = &cstate->current_fh;
310 __be32 status;
311 int accmode = 0;
312
313 /* We don't know the target directory, and therefore can not
314 * set the change info
315 */
316
317 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
318
319 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
320
321 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
322 (open->op_iattr.ia_size == 0);
323 /*
324 * In the delegation case, the client is telling us about an
325 * open that it *already* performed locally, some time ago. We
326 * should let it succeed now if possible.
327 *
328 * In the case of a CLAIM_FH open, on the other hand, the client
329 * may be counting on us to enforce permissions (the Linux 4.1
330 * client uses this for normal opens, for example).
331 */
332 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
333 accmode = NFSD_MAY_OWNER_OVERRIDE;
334
335 status = do_open_permission(rqstp, current_fh, open, accmode);
336
337 return status;
338}
339
340static void
341copy_clientid(clientid_t *clid, struct nfsd4_session *session)
342{
343 struct nfsd4_sessionid *sid =
344 (struct nfsd4_sessionid *)session->se_sessionid.data;
345
346 clid->cl_boot = sid->clientid.cl_boot;
347 clid->cl_id = sid->clientid.cl_id;
348}
349
350static __be32
351nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
352 union nfsd4_op_u *u)
353{
354 struct nfsd4_open *open = &u->open;
355 __be32 status;
356 struct svc_fh *resfh = NULL;
357 struct net *net = SVC_NET(rqstp);
358 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
359 bool reclaim = false;
360
361 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
362 (int)open->op_fname.len, open->op_fname.data,
363 open->op_openowner);
364
365 /* This check required by spec. */
366 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
367 return nfserr_inval;
368
369 open->op_created = false;
370 /*
371 * RFC5661 18.51.3
372 * Before RECLAIM_COMPLETE done, server should deny new lock
373 */
374 if (nfsd4_has_session(cstate) &&
375 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
376 &cstate->session->se_client->cl_flags) &&
377 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
378 return nfserr_grace;
379
380 if (nfsd4_has_session(cstate))
381 copy_clientid(&open->op_clientid, cstate->session);
382
383 /* check seqid for replay. set nfs4_owner */
384 status = nfsd4_process_open1(cstate, open, nn);
385 if (status == nfserr_replay_me) {
386 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
387 fh_put(&cstate->current_fh);
388 fh_copy_shallow(&cstate->current_fh.fh_handle,
389 &rp->rp_openfh);
390 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
391 if (status)
392 dprintk("nfsd4_open: replay failed"
393 " restoring previous filehandle\n");
394 else
395 status = nfserr_replay_me;
396 }
397 if (status)
398 goto out;
399 if (open->op_xdr_error) {
400 status = open->op_xdr_error;
401 goto out;
402 }
403
404 status = nfsd4_check_open_attributes(rqstp, cstate, open);
405 if (status)
406 goto out;
407
408 /* Openowner is now set, so sequence id will get bumped. Now we need
409 * these checks before we do any creates: */
410 status = nfserr_grace;
411 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
412 goto out;
413 status = nfserr_no_grace;
414 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
415 goto out;
416
417 switch (open->op_claim_type) {
418 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
419 case NFS4_OPEN_CLAIM_NULL:
420 status = do_open_lookup(rqstp, cstate, open, &resfh);
421 if (status)
422 goto out;
423 break;
424 case NFS4_OPEN_CLAIM_PREVIOUS:
425 status = nfs4_check_open_reclaim(&open->op_clientid,
426 cstate, nn);
427 if (status)
428 goto out;
429 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
430 reclaim = true;
431 fallthrough;
432 case NFS4_OPEN_CLAIM_FH:
433 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
434 status = do_open_fhandle(rqstp, cstate, open);
435 if (status)
436 goto out;
437 resfh = &cstate->current_fh;
438 break;
439 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
440 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
441 dprintk("NFSD: unsupported OPEN claim type %d\n",
442 open->op_claim_type);
443 status = nfserr_notsupp;
444 goto out;
445 default:
446 dprintk("NFSD: Invalid OPEN claim type %d\n",
447 open->op_claim_type);
448 status = nfserr_inval;
449 goto out;
450 }
451 /*
452 * nfsd4_process_open2() does the actual opening of the file. If
453 * successful, it (1) truncates the file if open->op_truncate was
454 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
455 */
456 status = nfsd4_process_open2(rqstp, resfh, open);
457 WARN(status && open->op_created,
458 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
459 be32_to_cpu(status));
460 if (reclaim && !status)
461 nn->somebody_reclaimed = true;
462out:
463 if (resfh && resfh != &cstate->current_fh) {
464 fh_dup2(&cstate->current_fh, resfh);
465 fh_put(resfh);
466 kfree(resfh);
467 }
468 nfsd4_cleanup_open_state(cstate, open);
469 nfsd4_bump_seqid(cstate, status);
470 return status;
471}
472
473/*
474 * OPEN is the only seqid-mutating operation whose decoding can fail
475 * with a seqid-mutating error (specifically, decoding of user names in
476 * the attributes). Therefore we have to do some processing to look up
477 * the stateowner so that we can bump the seqid.
478 */
479static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
480{
481 struct nfsd4_open *open = &op->u.open;
482
483 if (!seqid_mutating_err(ntohl(op->status)))
484 return op->status;
485 if (nfsd4_has_session(cstate))
486 return op->status;
487 open->op_xdr_error = op->status;
488 return nfsd4_open(rqstp, cstate, &op->u);
489}
490
491/*
492 * filehandle-manipulating ops.
493 */
494static __be32
495nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
496 union nfsd4_op_u *u)
497{
498 u->getfh = &cstate->current_fh;
499 return nfs_ok;
500}
501
502static __be32
503nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504 union nfsd4_op_u *u)
505{
506 struct nfsd4_putfh *putfh = &u->putfh;
507 __be32 ret;
508
509 fh_put(&cstate->current_fh);
510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
512 putfh->pf_fhlen);
513 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
514#ifdef CONFIG_NFSD_V4_2_INTER_SSC
515 if (ret == nfserr_stale && putfh->no_verify) {
516 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
517 ret = 0;
518 }
519#endif
520 return ret;
521}
522
523static __be32
524nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
525 union nfsd4_op_u *u)
526{
527 __be32 status;
528
529 fh_put(&cstate->current_fh);
530 status = exp_pseudoroot(rqstp, &cstate->current_fh);
531 return status;
532}
533
534static __be32
535nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
536 union nfsd4_op_u *u)
537{
538 if (!cstate->save_fh.fh_dentry)
539 return nfserr_restorefh;
540
541 fh_dup2(&cstate->current_fh, &cstate->save_fh);
542 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
543 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
544 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
545 }
546 return nfs_ok;
547}
548
549static __be32
550nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
551 union nfsd4_op_u *u)
552{
553 fh_dup2(&cstate->save_fh, &cstate->current_fh);
554 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
555 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
556 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
557 }
558 return nfs_ok;
559}
560
561/*
562 * misc nfsv4 ops
563 */
564static __be32
565nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
566 union nfsd4_op_u *u)
567{
568 struct nfsd4_access *access = &u->access;
569 u32 access_full;
570
571 access_full = NFS3_ACCESS_FULL;
572 if (cstate->minorversion >= 2)
573 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
574 NFS4_ACCESS_XAWRITE;
575
576 if (access->ac_req_access & ~access_full)
577 return nfserr_inval;
578
579 access->ac_resp_access = access->ac_req_access;
580 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
581 &access->ac_supported);
582}
583
584static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
585{
586 __be32 *verf = (__be32 *)verifier->data;
587
588 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
589
590 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
591}
592
593static __be32
594nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
595 union nfsd4_op_u *u)
596{
597 struct nfsd4_commit *commit = &u->commit;
598
599 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
600 commit->co_count,
601 (__be32 *)commit->co_verf.data);
602}
603
604static __be32
605nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
606 union nfsd4_op_u *u)
607{
608 struct nfsd4_create *create = &u->create;
609 struct svc_fh resfh;
610 __be32 status;
611 dev_t rdev;
612
613 fh_init(&resfh, NFS4_FHSIZE);
614
615 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
616 if (status)
617 return status;
618
619 status = check_attr_support(rqstp, cstate, create->cr_bmval,
620 nfsd_attrmask);
621 if (status)
622 return status;
623
624 current->fs->umask = create->cr_umask;
625 switch (create->cr_type) {
626 case NF4LNK:
627 status = nfsd_symlink(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
629 create->cr_data, &resfh);
630 break;
631
632 case NF4BLK:
633 status = nfserr_inval;
634 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
635 if (MAJOR(rdev) != create->cr_specdata1 ||
636 MINOR(rdev) != create->cr_specdata2)
637 goto out_umask;
638 status = nfsd_create(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 &create->cr_iattr, S_IFBLK, rdev, &resfh);
641 break;
642
643 case NF4CHR:
644 status = nfserr_inval;
645 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
646 if (MAJOR(rdev) != create->cr_specdata1 ||
647 MINOR(rdev) != create->cr_specdata2)
648 goto out_umask;
649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr,S_IFCHR, rdev, &resfh);
652 break;
653
654 case NF4SOCK:
655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr, S_IFSOCK, 0, &resfh);
658 break;
659
660 case NF4FIFO:
661 status = nfsd_create(rqstp, &cstate->current_fh,
662 create->cr_name, create->cr_namelen,
663 &create->cr_iattr, S_IFIFO, 0, &resfh);
664 break;
665
666 case NF4DIR:
667 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
668 status = nfsd_create(rqstp, &cstate->current_fh,
669 create->cr_name, create->cr_namelen,
670 &create->cr_iattr, S_IFDIR, 0, &resfh);
671 break;
672
673 default:
674 status = nfserr_badtype;
675 }
676
677 if (status)
678 goto out;
679
680 if (create->cr_label.len)
681 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
682
683 if (create->cr_acl != NULL)
684 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
685 create->cr_bmval);
686
687 fh_unlock(&cstate->current_fh);
688 set_change_info(&create->cr_cinfo, &cstate->current_fh);
689 fh_dup2(&cstate->current_fh, &resfh);
690out:
691 fh_put(&resfh);
692out_umask:
693 current->fs->umask = 0;
694 return status;
695}
696
697static __be32
698nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
699 union nfsd4_op_u *u)
700{
701 struct nfsd4_getattr *getattr = &u->getattr;
702 __be32 status;
703
704 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
705 if (status)
706 return status;
707
708 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
709 return nfserr_inval;
710
711 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
712 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
713 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
714
715 getattr->ga_fhp = &cstate->current_fh;
716 return nfs_ok;
717}
718
719static __be32
720nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
721 union nfsd4_op_u *u)
722{
723 struct nfsd4_link *link = &u->link;
724 __be32 status;
725
726 status = nfsd_link(rqstp, &cstate->current_fh,
727 link->li_name, link->li_namelen, &cstate->save_fh);
728 if (!status)
729 set_change_info(&link->li_cinfo, &cstate->current_fh);
730 return status;
731}
732
733static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
734{
735 struct svc_fh tmp_fh;
736 __be32 ret;
737
738 fh_init(&tmp_fh, NFS4_FHSIZE);
739 ret = exp_pseudoroot(rqstp, &tmp_fh);
740 if (ret)
741 return ret;
742 if (tmp_fh.fh_dentry == fh->fh_dentry) {
743 fh_put(&tmp_fh);
744 return nfserr_noent;
745 }
746 fh_put(&tmp_fh);
747 return nfsd_lookup(rqstp, fh, "..", 2, fh);
748}
749
750static __be32
751nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 union nfsd4_op_u *u)
753{
754 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
755}
756
757static __be32
758nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
759 union nfsd4_op_u *u)
760{
761 return nfsd_lookup(rqstp, &cstate->current_fh,
762 u->lookup.lo_name, u->lookup.lo_len,
763 &cstate->current_fh);
764}
765
766static __be32
767nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
768 union nfsd4_op_u *u)
769{
770 struct nfsd4_read *read = &u->read;
771 __be32 status;
772
773 read->rd_nf = NULL;
774 if (read->rd_offset >= OFFSET_MAX)
775 return nfserr_inval;
776
777 trace_nfsd_read_start(rqstp, &cstate->current_fh,
778 read->rd_offset, read->rd_length);
779
780 /*
781 * If we do a zero copy read, then a client will see read data
782 * that reflects the state of the file *after* performing the
783 * following compound.
784 *
785 * To ensure proper ordering, we therefore turn off zero copy if
786 * the client wants us to do more in this compound:
787 */
788 if (!nfsd4_last_compound_op(rqstp))
789 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
790
791 /* check stateid */
792 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
793 &read->rd_stateid, RD_STATE,
794 &read->rd_nf, NULL);
795 if (status) {
796 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
797 goto out;
798 }
799 status = nfs_ok;
800out:
801 read->rd_rqstp = rqstp;
802 read->rd_fhp = &cstate->current_fh;
803 return status;
804}
805
806
807static void
808nfsd4_read_release(union nfsd4_op_u *u)
809{
810 if (u->read.rd_nf)
811 nfsd_file_put(u->read.rd_nf);
812 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
813 u->read.rd_offset, u->read.rd_length);
814}
815
816static __be32
817nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
818 union nfsd4_op_u *u)
819{
820 struct nfsd4_readdir *readdir = &u->readdir;
821 u64 cookie = readdir->rd_cookie;
822 static const nfs4_verifier zeroverf;
823
824 /* no need to check permission - this will be done in nfsd_readdir() */
825
826 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
827 return nfserr_inval;
828
829 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
830 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
831 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
832
833 if ((cookie == 1) || (cookie == 2) ||
834 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
835 return nfserr_bad_cookie;
836
837 readdir->rd_rqstp = rqstp;
838 readdir->rd_fhp = &cstate->current_fh;
839 return nfs_ok;
840}
841
842static __be32
843nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
844 union nfsd4_op_u *u)
845{
846 u->readlink.rl_rqstp = rqstp;
847 u->readlink.rl_fhp = &cstate->current_fh;
848 return nfs_ok;
849}
850
851static __be32
852nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
853 union nfsd4_op_u *u)
854{
855 struct nfsd4_remove *remove = &u->remove;
856 __be32 status;
857
858 if (opens_in_grace(SVC_NET(rqstp)))
859 return nfserr_grace;
860 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
861 remove->rm_name, remove->rm_namelen);
862 if (!status) {
863 fh_unlock(&cstate->current_fh);
864 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
865 }
866 return status;
867}
868
869static __be32
870nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
871 union nfsd4_op_u *u)
872{
873 struct nfsd4_rename *rename = &u->rename;
874 __be32 status;
875
876 if (opens_in_grace(SVC_NET(rqstp)))
877 return nfserr_grace;
878 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
879 rename->rn_snamelen, &cstate->current_fh,
880 rename->rn_tname, rename->rn_tnamelen);
881 if (status)
882 return status;
883 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
884 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
885 return nfs_ok;
886}
887
888static __be32
889nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
890 union nfsd4_op_u *u)
891{
892 struct nfsd4_secinfo *secinfo = &u->secinfo;
893 struct svc_export *exp;
894 struct dentry *dentry;
895 __be32 err;
896
897 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
898 if (err)
899 return err;
900 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
901 secinfo->si_name, secinfo->si_namelen,
902 &exp, &dentry);
903 if (err)
904 return err;
905 fh_unlock(&cstate->current_fh);
906 if (d_really_is_negative(dentry)) {
907 exp_put(exp);
908 err = nfserr_noent;
909 } else
910 secinfo->si_exp = exp;
911 dput(dentry);
912 if (cstate->minorversion)
913 /* See rfc 5661 section 2.6.3.1.1.8 */
914 fh_put(&cstate->current_fh);
915 return err;
916}
917
918static __be32
919nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
920 union nfsd4_op_u *u)
921{
922 __be32 err;
923
924 switch (u->secinfo_no_name.sin_style) {
925 case NFS4_SECINFO_STYLE4_CURRENT_FH:
926 break;
927 case NFS4_SECINFO_STYLE4_PARENT:
928 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
929 if (err)
930 return err;
931 break;
932 default:
933 return nfserr_inval;
934 }
935
936 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
937 fh_put(&cstate->current_fh);
938 return nfs_ok;
939}
940
941static void
942nfsd4_secinfo_release(union nfsd4_op_u *u)
943{
944 if (u->secinfo.si_exp)
945 exp_put(u->secinfo.si_exp);
946}
947
948static void
949nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
950{
951 if (u->secinfo_no_name.sin_exp)
952 exp_put(u->secinfo_no_name.sin_exp);
953}
954
955static __be32
956nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
957 union nfsd4_op_u *u)
958{
959 struct nfsd4_setattr *setattr = &u->setattr;
960 __be32 status = nfs_ok;
961 int err;
962
963 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
964 status = nfs4_preprocess_stateid_op(rqstp, cstate,
965 &cstate->current_fh, &setattr->sa_stateid,
966 WR_STATE, NULL, NULL);
967 if (status) {
968 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
969 return status;
970 }
971 }
972 err = fh_want_write(&cstate->current_fh);
973 if (err)
974 return nfserrno(err);
975 status = nfs_ok;
976
977 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
978 nfsd_attrmask);
979 if (status)
980 goto out;
981
982 if (setattr->sa_acl != NULL)
983 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
984 setattr->sa_acl);
985 if (status)
986 goto out;
987 if (setattr->sa_label.len)
988 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
989 &setattr->sa_label);
990 if (status)
991 goto out;
992 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
993 0, (time64_t)0);
994out:
995 fh_drop_write(&cstate->current_fh);
996 return status;
997}
998
999static __be32
1000nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1001 union nfsd4_op_u *u)
1002{
1003 struct nfsd4_write *write = &u->write;
1004 stateid_t *stateid = &write->wr_stateid;
1005 struct nfsd_file *nf = NULL;
1006 __be32 status = nfs_ok;
1007 unsigned long cnt;
1008 int nvecs;
1009
1010 if (write->wr_offset >= OFFSET_MAX)
1011 return nfserr_inval;
1012
1013 cnt = write->wr_buflen;
1014 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1015 write->wr_offset, cnt);
1016 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1017 stateid, WR_STATE, &nf, NULL);
1018 if (status) {
1019 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1020 return status;
1021 }
1022
1023 write->wr_how_written = write->wr_stable_how;
1024
1025 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1026 &write->wr_head, write->wr_buflen);
1027 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1028
1029 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1030 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1031 write->wr_how_written,
1032 (__be32 *)write->wr_verifier.data);
1033 nfsd_file_put(nf);
1034
1035 write->wr_bytes_written = cnt;
1036 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1037 write->wr_offset, cnt);
1038 return status;
1039}
1040
1041static __be32
1042nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1043 stateid_t *src_stateid, struct nfsd_file **src,
1044 stateid_t *dst_stateid, struct nfsd_file **dst)
1045{
1046 __be32 status;
1047
1048 if (!cstate->save_fh.fh_dentry)
1049 return nfserr_nofilehandle;
1050
1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1052 src_stateid, RD_STATE, src, NULL);
1053 if (status) {
1054 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1055 goto out;
1056 }
1057
1058 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1059 dst_stateid, WR_STATE, dst, NULL);
1060 if (status) {
1061 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1062 goto out_put_src;
1063 }
1064
1065 /* fix up for NFS-specific error code */
1066 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1067 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1068 status = nfserr_wrong_type;
1069 goto out_put_dst;
1070 }
1071
1072out:
1073 return status;
1074out_put_dst:
1075 nfsd_file_put(*dst);
1076out_put_src:
1077 nfsd_file_put(*src);
1078 goto out;
1079}
1080
1081static __be32
1082nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1083 union nfsd4_op_u *u)
1084{
1085 struct nfsd4_clone *clone = &u->clone;
1086 struct nfsd_file *src, *dst;
1087 __be32 status;
1088
1089 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1090 &clone->cl_dst_stateid, &dst);
1091 if (status)
1092 goto out;
1093
1094 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1095 dst, clone->cl_dst_pos, clone->cl_count,
1096 EX_ISSYNC(cstate->current_fh.fh_export));
1097
1098 nfsd_file_put(dst);
1099 nfsd_file_put(src);
1100out:
1101 return status;
1102}
1103
1104void nfs4_put_copy(struct nfsd4_copy *copy)
1105{
1106 if (!refcount_dec_and_test(©->refcount))
1107 return;
1108 kfree(copy);
1109}
1110
1111static bool
1112check_and_set_stop_copy(struct nfsd4_copy *copy)
1113{
1114 bool value;
1115
1116 spin_lock(©->cp_clp->async_lock);
1117 value = copy->stopped;
1118 if (!copy->stopped)
1119 copy->stopped = true;
1120 spin_unlock(©->cp_clp->async_lock);
1121 return value;
1122}
1123
1124static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1125{
1126 /* only 1 thread should stop the copy */
1127 if (!check_and_set_stop_copy(copy))
1128 kthread_stop(copy->copy_task);
1129 nfs4_put_copy(copy);
1130}
1131
1132static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1133{
1134 struct nfsd4_copy *copy = NULL;
1135
1136 spin_lock(&clp->async_lock);
1137 if (!list_empty(&clp->async_copies)) {
1138 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1139 copies);
1140 refcount_inc(©->refcount);
1141 }
1142 spin_unlock(&clp->async_lock);
1143 return copy;
1144}
1145
1146void nfsd4_shutdown_copy(struct nfs4_client *clp)
1147{
1148 struct nfsd4_copy *copy;
1149
1150 while ((copy = nfsd4_get_copy(clp)) != NULL)
1151 nfsd4_stop_copy(copy);
1152}
1153#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1154
1155extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1156 struct nfs_fh *src_fh,
1157 nfs4_stateid *stateid);
1158extern void nfs42_ssc_close(struct file *filep);
1159
1160extern void nfs_sb_deactive(struct super_block *sb);
1161
1162#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1163
1164/*
1165 * Support one copy source server for now.
1166 */
1167static __be32
1168nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1169 struct vfsmount **mount)
1170{
1171 struct file_system_type *type;
1172 struct vfsmount *ss_mnt;
1173 struct nfs42_netaddr *naddr;
1174 struct sockaddr_storage tmp_addr;
1175 size_t tmp_addrlen, match_netid_len = 3;
1176 char *startsep = "", *endsep = "", *match_netid = "tcp";
1177 char *ipaddr, *dev_name, *raw_data;
1178 int len, raw_len;
1179 __be32 status = nfserr_inval;
1180
1181 naddr = &nss->u.nl4_addr;
1182 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1183 naddr->addr_len,
1184 (struct sockaddr *)&tmp_addr,
1185 sizeof(tmp_addr));
1186 if (tmp_addrlen == 0)
1187 goto out_err;
1188
1189 if (tmp_addr.ss_family == AF_INET6) {
1190 startsep = "[";
1191 endsep = "]";
1192 match_netid = "tcp6";
1193 match_netid_len = 4;
1194 }
1195
1196 if (naddr->netid_len != match_netid_len ||
1197 strncmp(naddr->netid, match_netid, naddr->netid_len))
1198 goto out_err;
1199
1200 /* Construct the raw data for the vfs_kern_mount call */
1201 len = RPC_MAX_ADDRBUFLEN + 1;
1202 ipaddr = kzalloc(len, GFP_KERNEL);
1203 if (!ipaddr)
1204 goto out_err;
1205
1206 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1207
1208 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1209
1210 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1211 raw_data = kzalloc(raw_len, GFP_KERNEL);
1212 if (!raw_data)
1213 goto out_free_ipaddr;
1214
1215 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1216
1217 status = nfserr_nodev;
1218 type = get_fs_type("nfs");
1219 if (!type)
1220 goto out_free_rawdata;
1221
1222 /* Set the server:<export> for the vfs_kern_mount call */
1223 dev_name = kzalloc(len + 5, GFP_KERNEL);
1224 if (!dev_name)
1225 goto out_free_rawdata;
1226 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1227
1228 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1229 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1230 module_put(type->owner);
1231 if (IS_ERR(ss_mnt))
1232 goto out_free_devname;
1233
1234 status = 0;
1235 *mount = ss_mnt;
1236
1237out_free_devname:
1238 kfree(dev_name);
1239out_free_rawdata:
1240 kfree(raw_data);
1241out_free_ipaddr:
1242 kfree(ipaddr);
1243out_err:
1244 return status;
1245}
1246
1247static void
1248nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1249{
1250 nfs_sb_deactive(ss_mnt->mnt_sb);
1251 mntput(ss_mnt);
1252}
1253
1254/*
1255 * Verify COPY destination stateid.
1256 *
1257 * Connect to the source server with NFSv4.1.
1258 * Create the source struct file for nfsd_copy_range.
1259 * Called with COPY cstate:
1260 * SAVED_FH: source filehandle
1261 * CURRENT_FH: destination filehandle
1262 */
1263static __be32
1264nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1265 struct nfsd4_compound_state *cstate,
1266 struct nfsd4_copy *copy, struct vfsmount **mount)
1267{
1268 struct svc_fh *s_fh = NULL;
1269 stateid_t *s_stid = ©->cp_src_stateid;
1270 __be32 status = nfserr_inval;
1271
1272 /* Verify the destination stateid and set dst struct file*/
1273 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1274 ©->cp_dst_stateid,
1275 WR_STATE, ©->nf_dst, NULL);
1276 if (status)
1277 goto out;
1278
1279 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
1280 if (status)
1281 goto out;
1282
1283 s_fh = &cstate->save_fh;
1284
1285 copy->c_fh.size = s_fh->fh_handle.fh_size;
1286 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
1287 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1288 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1289 sizeof(stateid_opaque_t));
1290
1291 status = 0;
1292out:
1293 return status;
1294}
1295
1296static void
1297nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1298 struct nfsd_file *dst)
1299{
1300 nfs42_ssc_close(src->nf_file);
1301 nfsd_file_put(src);
1302 nfsd_file_put(dst);
1303 mntput(ss_mnt);
1304}
1305
1306#else /* CONFIG_NFSD_V4_2_INTER_SSC */
1307
1308static __be32
1309nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1310 struct nfsd4_compound_state *cstate,
1311 struct nfsd4_copy *copy,
1312 struct vfsmount **mount)
1313{
1314 *mount = NULL;
1315 return nfserr_inval;
1316}
1317
1318static void
1319nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1320 struct nfsd_file *dst)
1321{
1322}
1323
1324static void
1325nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1326{
1327}
1328
1329static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1330 struct nfs_fh *src_fh,
1331 nfs4_stateid *stateid)
1332{
1333 return NULL;
1334}
1335#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1336
1337static __be32
1338nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1339 struct nfsd4_compound_state *cstate,
1340 struct nfsd4_copy *copy)
1341{
1342 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1343 ©->nf_src, ©->cp_dst_stateid,
1344 ©->nf_dst);
1345}
1346
1347static void
1348nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1349{
1350 nfsd_file_put(src);
1351 nfsd_file_put(dst);
1352}
1353
1354static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1355{
1356 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1357
1358 nfs4_put_copy(copy);
1359}
1360
1361static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1362 struct rpc_task *task)
1363{
1364 return 1;
1365}
1366
1367static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1368 .release = nfsd4_cb_offload_release,
1369 .done = nfsd4_cb_offload_done
1370};
1371
1372static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1373{
1374 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1375 copy->cp_synchronous = sync;
1376 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1377}
1378
1379static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1380{
1381 ssize_t bytes_copied = 0;
1382 size_t bytes_total = copy->cp_count;
1383 u64 src_pos = copy->cp_src_pos;
1384 u64 dst_pos = copy->cp_dst_pos;
1385
1386 do {
1387 if (kthread_should_stop())
1388 break;
1389 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1390 src_pos, copy->nf_dst->nf_file, dst_pos,
1391 bytes_total);
1392 if (bytes_copied <= 0)
1393 break;
1394 bytes_total -= bytes_copied;
1395 copy->cp_res.wr_bytes_written += bytes_copied;
1396 src_pos += bytes_copied;
1397 dst_pos += bytes_copied;
1398 } while (bytes_total > 0 && !copy->cp_synchronous);
1399 return bytes_copied;
1400}
1401
1402static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1403{
1404 __be32 status;
1405 ssize_t bytes;
1406
1407 bytes = _nfsd_copy_file_range(copy);
1408 /* for async copy, we ignore the error, client can always retry
1409 * to get the error
1410 */
1411 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1412 status = nfserrno(bytes);
1413 else {
1414 nfsd4_init_copy_res(copy, sync);
1415 status = nfs_ok;
1416 }
1417
1418 if (!copy->cp_intra) /* Inter server SSC */
1419 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1420 copy->nf_dst);
1421 else
1422 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1423
1424 return status;
1425}
1426
1427static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1428{
1429 dst->cp_src_pos = src->cp_src_pos;
1430 dst->cp_dst_pos = src->cp_dst_pos;
1431 dst->cp_count = src->cp_count;
1432 dst->cp_synchronous = src->cp_synchronous;
1433 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1434 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1435 dst->cp_clp = src->cp_clp;
1436 dst->nf_dst = nfsd_file_get(src->nf_dst);
1437 dst->cp_intra = src->cp_intra;
1438 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1439 dst->nf_src = nfsd_file_get(src->nf_src);
1440
1441 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1442 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1443 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1444 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1445 dst->ss_mnt = src->ss_mnt;
1446
1447 return 0;
1448}
1449
1450static void cleanup_async_copy(struct nfsd4_copy *copy)
1451{
1452 nfs4_free_copy_state(copy);
1453 nfsd_file_put(copy->nf_dst);
1454 if (copy->cp_intra)
1455 nfsd_file_put(copy->nf_src);
1456 spin_lock(©->cp_clp->async_lock);
1457 list_del(©->copies);
1458 spin_unlock(©->cp_clp->async_lock);
1459 nfs4_put_copy(copy);
1460}
1461
1462static int nfsd4_do_async_copy(void *data)
1463{
1464 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1465 struct nfsd4_copy *cb_copy;
1466
1467 if (!copy->cp_intra) { /* Inter server SSC */
1468 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1469 if (!copy->nf_src) {
1470 copy->nfserr = nfserr_serverfault;
1471 nfsd4_interssc_disconnect(copy->ss_mnt);
1472 goto do_callback;
1473 }
1474 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1475 ©->stateid);
1476 if (IS_ERR(copy->nf_src->nf_file)) {
1477 copy->nfserr = nfserr_offload_denied;
1478 nfsd4_interssc_disconnect(copy->ss_mnt);
1479 goto do_callback;
1480 }
1481 }
1482
1483 copy->nfserr = nfsd4_do_copy(copy, 0);
1484do_callback:
1485 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1486 if (!cb_copy)
1487 goto out;
1488 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1489 cb_copy->cp_clp = copy->cp_clp;
1490 cb_copy->nfserr = copy->nfserr;
1491 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1492 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1493 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1494 nfsd4_run_cb(&cb_copy->cp_cb);
1495out:
1496 if (!copy->cp_intra)
1497 kfree(copy->nf_src);
1498 cleanup_async_copy(copy);
1499 return 0;
1500}
1501
1502static __be32
1503nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1504 union nfsd4_op_u *u)
1505{
1506 struct nfsd4_copy *copy = &u->copy;
1507 __be32 status;
1508 struct nfsd4_copy *async_copy = NULL;
1509
1510 if (!copy->cp_intra) { /* Inter server SSC */
1511 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1512 status = nfserr_notsupp;
1513 goto out;
1514 }
1515 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1516 ©->ss_mnt);
1517 if (status)
1518 return nfserr_offload_denied;
1519 } else {
1520 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1521 if (status)
1522 return status;
1523 }
1524
1525 copy->cp_clp = cstate->clp;
1526 memcpy(©->fh, &cstate->current_fh.fh_handle,
1527 sizeof(struct knfsd_fh));
1528 if (!copy->cp_synchronous) {
1529 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1530
1531 status = nfserrno(-ENOMEM);
1532 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1533 if (!async_copy)
1534 goto out_err;
1535 if (!nfs4_init_copy_state(nn, copy))
1536 goto out_err;
1537 refcount_set(&async_copy->refcount, 1);
1538 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1539 sizeof(copy->cp_stateid));
1540 status = dup_copy_fields(copy, async_copy);
1541 if (status)
1542 goto out_err;
1543 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1544 async_copy, "%s", "copy thread");
1545 if (IS_ERR(async_copy->copy_task))
1546 goto out_err;
1547 spin_lock(&async_copy->cp_clp->async_lock);
1548 list_add(&async_copy->copies,
1549 &async_copy->cp_clp->async_copies);
1550 spin_unlock(&async_copy->cp_clp->async_lock);
1551 wake_up_process(async_copy->copy_task);
1552 status = nfs_ok;
1553 } else {
1554 status = nfsd4_do_copy(copy, 1);
1555 }
1556out:
1557 return status;
1558out_err:
1559 if (async_copy)
1560 cleanup_async_copy(async_copy);
1561 status = nfserrno(-ENOMEM);
1562 if (!copy->cp_intra)
1563 nfsd4_interssc_disconnect(copy->ss_mnt);
1564 goto out;
1565}
1566
1567struct nfsd4_copy *
1568find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1569{
1570 struct nfsd4_copy *copy;
1571
1572 spin_lock(&clp->async_lock);
1573 list_for_each_entry(copy, &clp->async_copies, copies) {
1574 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
1575 continue;
1576 refcount_inc(©->refcount);
1577 spin_unlock(&clp->async_lock);
1578 return copy;
1579 }
1580 spin_unlock(&clp->async_lock);
1581 return NULL;
1582}
1583
1584static __be32
1585nfsd4_offload_cancel(struct svc_rqst *rqstp,
1586 struct nfsd4_compound_state *cstate,
1587 union nfsd4_op_u *u)
1588{
1589 struct nfsd4_offload_status *os = &u->offload_status;
1590 struct nfsd4_copy *copy;
1591 struct nfs4_client *clp = cstate->clp;
1592
1593 copy = find_async_copy(clp, &os->stateid);
1594 if (!copy) {
1595 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1596
1597 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1598 } else
1599 nfsd4_stop_copy(copy);
1600
1601 return nfs_ok;
1602}
1603
1604static __be32
1605nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1606 union nfsd4_op_u *u)
1607{
1608 struct nfsd4_copy_notify *cn = &u->copy_notify;
1609 __be32 status;
1610 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1611 struct nfs4_stid *stid;
1612 struct nfs4_cpntf_state *cps;
1613 struct nfs4_client *clp = cstate->clp;
1614
1615 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1616 &cn->cpn_src_stateid, RD_STATE, NULL,
1617 &stid);
1618 if (status)
1619 return status;
1620
1621 cn->cpn_sec = nn->nfsd4_lease;
1622 cn->cpn_nsec = 0;
1623
1624 status = nfserrno(-ENOMEM);
1625 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1626 if (!cps)
1627 goto out;
1628 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1629 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1630 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1631
1632 /* For now, only return one server address in cpn_src, the
1633 * address used by the client to connect to this server.
1634 */
1635 cn->cpn_src.nl4_type = NL4_NETADDR;
1636 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1637 &cn->cpn_src.u.nl4_addr);
1638 WARN_ON_ONCE(status);
1639 if (status) {
1640 nfs4_put_cpntf_state(nn, cps);
1641 goto out;
1642 }
1643out:
1644 nfs4_put_stid(stid);
1645 return status;
1646}
1647
1648static __be32
1649nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1650 struct nfsd4_fallocate *fallocate, int flags)
1651{
1652 __be32 status;
1653 struct nfsd_file *nf;
1654
1655 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1656 &fallocate->falloc_stateid,
1657 WR_STATE, &nf, NULL);
1658 if (status != nfs_ok) {
1659 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1660 return status;
1661 }
1662
1663 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1664 fallocate->falloc_offset,
1665 fallocate->falloc_length,
1666 flags);
1667 nfsd_file_put(nf);
1668 return status;
1669}
1670static __be32
1671nfsd4_offload_status(struct svc_rqst *rqstp,
1672 struct nfsd4_compound_state *cstate,
1673 union nfsd4_op_u *u)
1674{
1675 struct nfsd4_offload_status *os = &u->offload_status;
1676 __be32 status = 0;
1677 struct nfsd4_copy *copy;
1678 struct nfs4_client *clp = cstate->clp;
1679
1680 copy = find_async_copy(clp, &os->stateid);
1681 if (copy) {
1682 os->count = copy->cp_res.wr_bytes_written;
1683 nfs4_put_copy(copy);
1684 } else
1685 status = nfserr_bad_stateid;
1686
1687 return status;
1688}
1689
1690static __be32
1691nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1692 union nfsd4_op_u *u)
1693{
1694 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1695}
1696
1697static __be32
1698nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1699 union nfsd4_op_u *u)
1700{
1701 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1702 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1703}
1704
1705static __be32
1706nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1707 union nfsd4_op_u *u)
1708{
1709 struct nfsd4_seek *seek = &u->seek;
1710 int whence;
1711 __be32 status;
1712 struct nfsd_file *nf;
1713
1714 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1715 &seek->seek_stateid,
1716 RD_STATE, &nf, NULL);
1717 if (status) {
1718 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1719 return status;
1720 }
1721
1722 switch (seek->seek_whence) {
1723 case NFS4_CONTENT_DATA:
1724 whence = SEEK_DATA;
1725 break;
1726 case NFS4_CONTENT_HOLE:
1727 whence = SEEK_HOLE;
1728 break;
1729 default:
1730 status = nfserr_union_notsupp;
1731 goto out;
1732 }
1733
1734 /*
1735 * Note: This call does change file->f_pos, but nothing in NFSD
1736 * should ever file->f_pos.
1737 */
1738 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1739 if (seek->seek_pos < 0)
1740 status = nfserrno(seek->seek_pos);
1741 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1742 seek->seek_eof = true;
1743
1744out:
1745 nfsd_file_put(nf);
1746 return status;
1747}
1748
1749/* This routine never returns NFS_OK! If there are no other errors, it
1750 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1751 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1752 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1753 */
1754static __be32
1755_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1756 struct nfsd4_verify *verify)
1757{
1758 __be32 *buf, *p;
1759 int count;
1760 __be32 status;
1761
1762 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1763 if (status)
1764 return status;
1765
1766 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1767 if (status)
1768 return status;
1769
1770 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1771 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1772 return nfserr_inval;
1773 if (verify->ve_attrlen & 3)
1774 return nfserr_inval;
1775
1776 /* count in words:
1777 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1778 */
1779 count = 4 + (verify->ve_attrlen >> 2);
1780 buf = kmalloc(count << 2, GFP_KERNEL);
1781 if (!buf)
1782 return nfserr_jukebox;
1783
1784 p = buf;
1785 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1786 cstate->current_fh.fh_export,
1787 cstate->current_fh.fh_dentry,
1788 verify->ve_bmval,
1789 rqstp, 0);
1790 /*
1791 * If nfsd4_encode_fattr() ran out of space, assume that's because
1792 * the attributes are longer (hence different) than those given:
1793 */
1794 if (status == nfserr_resource)
1795 status = nfserr_not_same;
1796 if (status)
1797 goto out_kfree;
1798
1799 /* skip bitmap */
1800 p = buf + 1 + ntohl(buf[0]);
1801 status = nfserr_not_same;
1802 if (ntohl(*p++) != verify->ve_attrlen)
1803 goto out_kfree;
1804 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1805 status = nfserr_same;
1806
1807out_kfree:
1808 kfree(buf);
1809 return status;
1810}
1811
1812static __be32
1813nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1814 union nfsd4_op_u *u)
1815{
1816 __be32 status;
1817
1818 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1819 return status == nfserr_not_same ? nfs_ok : status;
1820}
1821
1822static __be32
1823nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1824 union nfsd4_op_u *u)
1825{
1826 __be32 status;
1827
1828 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1829 return status == nfserr_same ? nfs_ok : status;
1830}
1831
1832#ifdef CONFIG_NFSD_PNFS
1833static const struct nfsd4_layout_ops *
1834nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1835{
1836 if (!exp->ex_layout_types) {
1837 dprintk("%s: export does not support pNFS\n", __func__);
1838 return NULL;
1839 }
1840
1841 if (layout_type >= LAYOUT_TYPE_MAX ||
1842 !(exp->ex_layout_types & (1 << layout_type))) {
1843 dprintk("%s: layout type %d not supported\n",
1844 __func__, layout_type);
1845 return NULL;
1846 }
1847
1848 return nfsd4_layout_ops[layout_type];
1849}
1850
1851static __be32
1852nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1853 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1854{
1855 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1856 const struct nfsd4_layout_ops *ops;
1857 struct nfsd4_deviceid_map *map;
1858 struct svc_export *exp;
1859 __be32 nfserr;
1860
1861 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1862 __func__,
1863 gdp->gd_layout_type,
1864 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1865 gdp->gd_maxcount);
1866
1867 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1868 if (!map) {
1869 dprintk("%s: couldn't find device ID to export mapping!\n",
1870 __func__);
1871 return nfserr_noent;
1872 }
1873
1874 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1875 if (IS_ERR(exp)) {
1876 dprintk("%s: could not find device id\n", __func__);
1877 return nfserr_noent;
1878 }
1879
1880 nfserr = nfserr_layoutunavailable;
1881 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1882 if (!ops)
1883 goto out;
1884
1885 nfserr = nfs_ok;
1886 if (gdp->gd_maxcount != 0) {
1887 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1888 rqstp, cstate->session->se_client, gdp);
1889 }
1890
1891 gdp->gd_notify_types &= ops->notify_types;
1892out:
1893 exp_put(exp);
1894 return nfserr;
1895}
1896
1897static void
1898nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1899{
1900 kfree(u->getdeviceinfo.gd_device);
1901}
1902
1903static __be32
1904nfsd4_layoutget(struct svc_rqst *rqstp,
1905 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1906{
1907 struct nfsd4_layoutget *lgp = &u->layoutget;
1908 struct svc_fh *current_fh = &cstate->current_fh;
1909 const struct nfsd4_layout_ops *ops;
1910 struct nfs4_layout_stateid *ls;
1911 __be32 nfserr;
1912 int accmode = NFSD_MAY_READ_IF_EXEC;
1913
1914 switch (lgp->lg_seg.iomode) {
1915 case IOMODE_READ:
1916 accmode |= NFSD_MAY_READ;
1917 break;
1918 case IOMODE_RW:
1919 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1920 break;
1921 default:
1922 dprintk("%s: invalid iomode %d\n",
1923 __func__, lgp->lg_seg.iomode);
1924 nfserr = nfserr_badiomode;
1925 goto out;
1926 }
1927
1928 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1929 if (nfserr)
1930 goto out;
1931
1932 nfserr = nfserr_layoutunavailable;
1933 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1934 if (!ops)
1935 goto out;
1936
1937 /*
1938 * Verify minlength and range as per RFC5661:
1939 * o If loga_length is less than loga_minlength,
1940 * the metadata server MUST return NFS4ERR_INVAL.
1941 * o If the sum of loga_offset and loga_minlength exceeds
1942 * NFS4_UINT64_MAX, and loga_minlength is not
1943 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1944 * o If the sum of loga_offset and loga_length exceeds
1945 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1946 * the error NFS4ERR_INVAL MUST result.
1947 */
1948 nfserr = nfserr_inval;
1949 if (lgp->lg_seg.length < lgp->lg_minlength ||
1950 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1951 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1952 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1953 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1954 goto out;
1955 if (lgp->lg_seg.length == 0)
1956 goto out;
1957
1958 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1959 true, lgp->lg_layout_type, &ls);
1960 if (nfserr) {
1961 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1962 goto out;
1963 }
1964
1965 nfserr = nfserr_recallconflict;
1966 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1967 goto out_put_stid;
1968
1969 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1970 current_fh, lgp);
1971 if (nfserr)
1972 goto out_put_stid;
1973
1974 nfserr = nfsd4_insert_layout(lgp, ls);
1975
1976out_put_stid:
1977 mutex_unlock(&ls->ls_mutex);
1978 nfs4_put_stid(&ls->ls_stid);
1979out:
1980 return nfserr;
1981}
1982
1983static void
1984nfsd4_layoutget_release(union nfsd4_op_u *u)
1985{
1986 kfree(u->layoutget.lg_content);
1987}
1988
1989static __be32
1990nfsd4_layoutcommit(struct svc_rqst *rqstp,
1991 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1992{
1993 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1994 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1995 struct svc_fh *current_fh = &cstate->current_fh;
1996 const struct nfsd4_layout_ops *ops;
1997 loff_t new_size = lcp->lc_last_wr + 1;
1998 struct inode *inode;
1999 struct nfs4_layout_stateid *ls;
2000 __be32 nfserr;
2001
2002 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2003 if (nfserr)
2004 goto out;
2005
2006 nfserr = nfserr_layoutunavailable;
2007 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2008 if (!ops)
2009 goto out;
2010 inode = d_inode(current_fh->fh_dentry);
2011
2012 nfserr = nfserr_inval;
2013 if (new_size <= seg->offset) {
2014 dprintk("pnfsd: last write before layout segment\n");
2015 goto out;
2016 }
2017 if (new_size > seg->offset + seg->length) {
2018 dprintk("pnfsd: last write beyond layout segment\n");
2019 goto out;
2020 }
2021 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2022 dprintk("pnfsd: layoutcommit beyond EOF\n");
2023 goto out;
2024 }
2025
2026 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2027 false, lcp->lc_layout_type,
2028 &ls);
2029 if (nfserr) {
2030 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2031 /* fixup error code as per RFC5661 */
2032 if (nfserr == nfserr_bad_stateid)
2033 nfserr = nfserr_badlayout;
2034 goto out;
2035 }
2036
2037 /* LAYOUTCOMMIT does not require any serialization */
2038 mutex_unlock(&ls->ls_mutex);
2039
2040 if (new_size > i_size_read(inode)) {
2041 lcp->lc_size_chg = 1;
2042 lcp->lc_newsize = new_size;
2043 } else {
2044 lcp->lc_size_chg = 0;
2045 }
2046
2047 nfserr = ops->proc_layoutcommit(inode, lcp);
2048 nfs4_put_stid(&ls->ls_stid);
2049out:
2050 return nfserr;
2051}
2052
2053static __be32
2054nfsd4_layoutreturn(struct svc_rqst *rqstp,
2055 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2056{
2057 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2058 struct svc_fh *current_fh = &cstate->current_fh;
2059 __be32 nfserr;
2060
2061 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2062 if (nfserr)
2063 goto out;
2064
2065 nfserr = nfserr_layoutunavailable;
2066 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2067 goto out;
2068
2069 switch (lrp->lr_seg.iomode) {
2070 case IOMODE_READ:
2071 case IOMODE_RW:
2072 case IOMODE_ANY:
2073 break;
2074 default:
2075 dprintk("%s: invalid iomode %d\n", __func__,
2076 lrp->lr_seg.iomode);
2077 nfserr = nfserr_inval;
2078 goto out;
2079 }
2080
2081 switch (lrp->lr_return_type) {
2082 case RETURN_FILE:
2083 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2084 break;
2085 case RETURN_FSID:
2086 case RETURN_ALL:
2087 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2088 break;
2089 default:
2090 dprintk("%s: invalid return_type %d\n", __func__,
2091 lrp->lr_return_type);
2092 nfserr = nfserr_inval;
2093 break;
2094 }
2095out:
2096 return nfserr;
2097}
2098#endif /* CONFIG_NFSD_PNFS */
2099
2100static __be32
2101nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2102 union nfsd4_op_u *u)
2103{
2104 struct nfsd4_getxattr *getxattr = &u->getxattr;
2105
2106 return nfsd_getxattr(rqstp, &cstate->current_fh,
2107 getxattr->getxa_name, &getxattr->getxa_buf,
2108 &getxattr->getxa_len);
2109}
2110
2111static __be32
2112nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2113 union nfsd4_op_u *u)
2114{
2115 struct nfsd4_setxattr *setxattr = &u->setxattr;
2116 __be32 ret;
2117
2118 if (opens_in_grace(SVC_NET(rqstp)))
2119 return nfserr_grace;
2120
2121 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2122 setxattr->setxa_buf, setxattr->setxa_len,
2123 setxattr->setxa_flags);
2124
2125 if (!ret)
2126 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2127
2128 return ret;
2129}
2130
2131static __be32
2132nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2133 union nfsd4_op_u *u)
2134{
2135 /*
2136 * Get the entire list, then copy out only the user attributes
2137 * in the encode function.
2138 */
2139 return nfsd_listxattr(rqstp, &cstate->current_fh,
2140 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2141}
2142
2143static __be32
2144nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2145 union nfsd4_op_u *u)
2146{
2147 struct nfsd4_removexattr *removexattr = &u->removexattr;
2148 __be32 ret;
2149
2150 if (opens_in_grace(SVC_NET(rqstp)))
2151 return nfserr_grace;
2152
2153 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2154 removexattr->rmxa_name);
2155
2156 if (!ret)
2157 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2158
2159 return ret;
2160}
2161
2162/*
2163 * NULL call.
2164 */
2165static __be32
2166nfsd4_proc_null(struct svc_rqst *rqstp)
2167{
2168 return nfs_ok;
2169}
2170
2171static inline void nfsd4_increment_op_stats(u32 opnum)
2172{
2173 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2174 nfsdstats.nfs4_opcount[opnum]++;
2175}
2176
2177static const struct nfsd4_operation nfsd4_ops[];
2178
2179static const char *nfsd4_op_name(unsigned opnum);
2180
2181/*
2182 * Enforce NFSv4.1 COMPOUND ordering rules:
2183 *
2184 * Also note, enforced elsewhere:
2185 * - SEQUENCE other than as first op results in
2186 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2187 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2188 * (Enforced in nfsd4_bind_conn_to_session().)
2189 * - DESTROY_SESSION must be the final operation in a compound, if
2190 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2191 * (Enforced in nfsd4_destroy_session().)
2192 */
2193static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2194{
2195 struct nfsd4_op *first_op = &args->ops[0];
2196
2197 /* These ordering requirements don't apply to NFSv4.0: */
2198 if (args->minorversion == 0)
2199 return nfs_ok;
2200 /* This is weird, but OK, not our problem: */
2201 if (args->opcnt == 0)
2202 return nfs_ok;
2203 if (first_op->status == nfserr_op_illegal)
2204 return nfs_ok;
2205 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2206 return nfserr_op_not_in_session;
2207 if (first_op->opnum == OP_SEQUENCE)
2208 return nfs_ok;
2209 /*
2210 * So first_op is something allowed outside a session, like
2211 * EXCHANGE_ID; but then it has to be the only op in the
2212 * compound:
2213 */
2214 if (args->opcnt != 1)
2215 return nfserr_not_only_op;
2216 return nfs_ok;
2217}
2218
2219const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2220{
2221 return &nfsd4_ops[op->opnum];
2222}
2223
2224bool nfsd4_cache_this_op(struct nfsd4_op *op)
2225{
2226 if (op->opnum == OP_ILLEGAL)
2227 return false;
2228 return OPDESC(op)->op_flags & OP_CACHEME;
2229}
2230
2231static bool need_wrongsec_check(struct svc_rqst *rqstp)
2232{
2233 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2234 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2235 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2236 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2237 const struct nfsd4_operation *thisd = OPDESC(this);
2238 const struct nfsd4_operation *nextd;
2239
2240 /*
2241 * Most ops check wronsec on our own; only the putfh-like ops
2242 * have special rules.
2243 */
2244 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2245 return false;
2246 /*
2247 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2248 * put-filehandle operation if we're not going to use the
2249 * result:
2250 */
2251 if (argp->opcnt == resp->opcnt)
2252 return false;
2253 if (next->opnum == OP_ILLEGAL)
2254 return false;
2255 nextd = OPDESC(next);
2256 /*
2257 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2258 * errors themselves as necessary; others should check for them
2259 * now:
2260 */
2261 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2262}
2263
2264static void svcxdr_init_encode(struct svc_rqst *rqstp,
2265 struct nfsd4_compoundres *resp)
2266{
2267 struct xdr_stream *xdr = &resp->xdr;
2268 struct xdr_buf *buf = &rqstp->rq_res;
2269 struct kvec *head = buf->head;
2270
2271 xdr->buf = buf;
2272 xdr->iov = head;
2273 xdr->p = head->iov_base + head->iov_len;
2274 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
2275 /* Tail and page_len should be zero at this point: */
2276 buf->len = buf->head[0].iov_len;
2277 xdr->scratch.iov_len = 0;
2278 xdr->page_ptr = buf->pages - 1;
2279 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
2280 - rqstp->rq_auth_slack;
2281}
2282
2283#ifdef CONFIG_NFSD_V4_2_INTER_SSC
2284static void
2285check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2286{
2287 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2288 struct nfsd4_copy *copy;
2289 struct nfsd4_putfh *putfh;
2290 int i;
2291
2292 /* traverse all operation and if it's a COPY compound, mark the
2293 * source filehandle to skip verification
2294 */
2295 for (i = 0; i < args->opcnt; i++) {
2296 op = &args->ops[i];
2297 if (op->opnum == OP_PUTFH)
2298 current_op = op;
2299 else if (op->opnum == OP_SAVEFH)
2300 saved_op = current_op;
2301 else if (op->opnum == OP_RESTOREFH)
2302 current_op = saved_op;
2303 else if (op->opnum == OP_COPY) {
2304 copy = (struct nfsd4_copy *)&op->u;
2305 if (!saved_op) {
2306 op->status = nfserr_nofilehandle;
2307 return;
2308 }
2309 putfh = (struct nfsd4_putfh *)&saved_op->u;
2310 if (!copy->cp_intra)
2311 putfh->no_verify = true;
2312 }
2313 }
2314}
2315#else
2316static void
2317check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2318{
2319}
2320#endif
2321
2322/*
2323 * COMPOUND call.
2324 */
2325static __be32
2326nfsd4_proc_compound(struct svc_rqst *rqstp)
2327{
2328 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2329 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2330 struct nfsd4_op *op;
2331 struct nfsd4_compound_state *cstate = &resp->cstate;
2332 struct svc_fh *current_fh = &cstate->current_fh;
2333 struct svc_fh *save_fh = &cstate->save_fh;
2334 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2335 __be32 status;
2336
2337 svcxdr_init_encode(rqstp, resp);
2338 resp->tagp = resp->xdr.p;
2339 /* reserve space for: taglen, tag, and opcnt */
2340 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
2341 resp->taglen = args->taglen;
2342 resp->tag = args->tag;
2343 resp->rqstp = rqstp;
2344 cstate->minorversion = args->minorversion;
2345 fh_init(current_fh, NFS4_FHSIZE);
2346 fh_init(save_fh, NFS4_FHSIZE);
2347 /*
2348 * Don't use the deferral mechanism for NFSv4; compounds make it
2349 * too hard to avoid non-idempotency problems.
2350 */
2351 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2352
2353 /*
2354 * According to RFC3010, this takes precedence over all other errors.
2355 */
2356 status = nfserr_minor_vers_mismatch;
2357 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2358 goto out;
2359 status = nfserr_resource;
2360 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2361 goto out;
2362
2363 status = nfs41_check_op_ordering(args);
2364 if (status) {
2365 op = &args->ops[0];
2366 op->status = status;
2367 resp->opcnt = 1;
2368 goto encode_op;
2369 }
2370 check_if_stalefh_allowed(args);
2371
2372 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2373
2374 trace_nfsd_compound(rqstp, args->opcnt);
2375 while (!status && resp->opcnt < args->opcnt) {
2376 op = &args->ops[resp->opcnt++];
2377
2378 /*
2379 * The XDR decode routines may have pre-set op->status;
2380 * for example, if there is a miscellaneous XDR error
2381 * it will be set to nfserr_bad_xdr.
2382 */
2383 if (op->status) {
2384 if (op->opnum == OP_OPEN)
2385 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2386 goto encode_op;
2387 }
2388 if (!current_fh->fh_dentry &&
2389 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2390 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2391 op->status = nfserr_nofilehandle;
2392 goto encode_op;
2393 }
2394 } else if (current_fh->fh_export &&
2395 current_fh->fh_export->ex_fslocs.migrated &&
2396 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2397 op->status = nfserr_moved;
2398 goto encode_op;
2399 }
2400
2401 fh_clear_wcc(current_fh);
2402
2403 /* If op is non-idempotent */
2404 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2405 /*
2406 * Don't execute this op if we couldn't encode a
2407 * succesful reply:
2408 */
2409 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2410 /*
2411 * Plus if there's another operation, make sure
2412 * we'll have space to at least encode an error:
2413 */
2414 if (resp->opcnt < args->opcnt)
2415 plen += COMPOUND_ERR_SLACK_SPACE;
2416 op->status = nfsd4_check_resp_size(resp, plen);
2417 }
2418
2419 if (op->status)
2420 goto encode_op;
2421
2422 if (op->opdesc->op_get_currentstateid)
2423 op->opdesc->op_get_currentstateid(cstate, &op->u);
2424 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2425
2426 /* Only from SEQUENCE */
2427 if (cstate->status == nfserr_replay_cache) {
2428 dprintk("%s NFS4.1 replay from cache\n", __func__);
2429 status = op->status;
2430 goto out;
2431 }
2432 if (!op->status) {
2433 if (op->opdesc->op_set_currentstateid)
2434 op->opdesc->op_set_currentstateid(cstate, &op->u);
2435
2436 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2437 clear_current_stateid(cstate);
2438
2439 if (current_fh->fh_export &&
2440 need_wrongsec_check(rqstp))
2441 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2442 }
2443encode_op:
2444 if (op->status == nfserr_replay_me) {
2445 op->replay = &cstate->replay_owner->so_replay;
2446 nfsd4_encode_replay(&resp->xdr, op);
2447 status = op->status = op->replay->rp_status;
2448 } else {
2449 nfsd4_encode_operation(resp, op);
2450 status = op->status;
2451 }
2452
2453 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2454 nfsd4_op_name(op->opnum));
2455
2456 nfsd4_cstate_clear_replay(cstate);
2457 nfsd4_increment_op_stats(op->opnum);
2458 }
2459
2460 cstate->status = status;
2461 fh_put(current_fh);
2462 fh_put(save_fh);
2463 BUG_ON(cstate->replay_owner);
2464out:
2465 /* Reset deferral mechanism for RPC deferrals */
2466 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2467 dprintk("nfsv4 compound returned %d\n", ntohl(status));
2468 return status;
2469}
2470
2471#define op_encode_hdr_size (2)
2472#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2473#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2474#define op_encode_change_info_maxsz (5)
2475#define nfs4_fattr_bitmap_maxsz (4)
2476
2477/* We'll fall back on returning no lockowner if run out of space: */
2478#define op_encode_lockowner_maxsz (0)
2479#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2480
2481#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2482
2483#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2484#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2485 op_encode_ace_maxsz)
2486
2487#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2488
2489static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2490{
2491 return (op_encode_hdr_size) * sizeof(__be32);
2492}
2493
2494static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2495{
2496 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2497}
2498
2499static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2500{
2501 /* ac_supported, ac_resp_access */
2502 return (op_encode_hdr_size + 2)* sizeof(__be32);
2503}
2504
2505static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2506{
2507 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2508}
2509
2510static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2511{
2512 return (op_encode_hdr_size + op_encode_change_info_maxsz
2513 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2514}
2515
2516/*
2517 * Note since this is an idempotent operation we won't insist on failing
2518 * the op prematurely if the estimate is too large. We may turn off splice
2519 * reads unnecessarily.
2520 */
2521static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2522 struct nfsd4_op *op)
2523{
2524 u32 *bmap = op->u.getattr.ga_bmval;
2525 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2526 u32 ret = 0;
2527
2528 if (bmap0 & FATTR4_WORD0_ACL)
2529 return svc_max_payload(rqstp);
2530 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2531 return svc_max_payload(rqstp);
2532
2533 if (bmap1 & FATTR4_WORD1_OWNER) {
2534 ret += IDMAP_NAMESZ + 4;
2535 bmap1 &= ~FATTR4_WORD1_OWNER;
2536 }
2537 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2538 ret += IDMAP_NAMESZ + 4;
2539 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2540 }
2541 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2542 ret += NFS4_FHSIZE + 4;
2543 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2544 }
2545 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2546 ret += NFS4_MAXLABELLEN + 12;
2547 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2548 }
2549 /*
2550 * Largest of remaining attributes are 16 bytes (e.g.,
2551 * supported_attributes)
2552 */
2553 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2554 /* bitmask, length */
2555 ret += 20;
2556 return ret;
2557}
2558
2559static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2560{
2561 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2562}
2563
2564static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2565{
2566 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2567 * sizeof(__be32);
2568}
2569
2570static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2571{
2572 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2573 * sizeof(__be32);
2574}
2575
2576static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2577{
2578 return (op_encode_hdr_size + op_encode_stateid_maxsz
2579 + op_encode_change_info_maxsz + 1
2580 + nfs4_fattr_bitmap_maxsz
2581 + op_encode_delegation_maxsz) * sizeof(__be32);
2582}
2583
2584static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2585{
2586 u32 maxcount = 0, rlen = 0;
2587
2588 maxcount = svc_max_payload(rqstp);
2589 rlen = min(op->u.read.rd_length, maxcount);
2590
2591 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2592}
2593
2594static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2595{
2596 u32 maxcount = 0, rlen = 0;
2597
2598 maxcount = svc_max_payload(rqstp);
2599 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2600
2601 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2602 XDR_QUADLEN(rlen)) * sizeof(__be32);
2603}
2604
2605static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2606{
2607 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2608}
2609
2610static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2611{
2612 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2613 * sizeof(__be32);
2614}
2615
2616static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2617{
2618 return (op_encode_hdr_size + op_encode_change_info_maxsz
2619 + op_encode_change_info_maxsz) * sizeof(__be32);
2620}
2621
2622static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2623 struct nfsd4_op *op)
2624{
2625 return (op_encode_hdr_size
2626 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2627}
2628
2629static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2630{
2631 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2632 * sizeof(__be32);
2633}
2634
2635static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2636{
2637 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2638}
2639
2640static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2641{
2642 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2643 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2644}
2645
2646static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2647{
2648 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2649 sizeof(__be32);
2650}
2651
2652static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2653{
2654 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2655}
2656
2657static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2658{
2659 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2660 1 + 1 + /* eir_flags, spr_how */\
2661 4 + /* spo_must_enforce & _allow with bitmap */\
2662 2 + /*eir_server_owner.so_minor_id */\
2663 /* eir_server_owner.so_major_id<> */\
2664 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2665 /* eir_server_scope<> */\
2666 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2667 1 + /* eir_server_impl_id array length */\
2668 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2669}
2670
2671static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2672{
2673 return (op_encode_hdr_size + \
2674 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2675 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2676}
2677
2678static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2679{
2680 return (op_encode_hdr_size + \
2681 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2682 2 + /* csr_sequence, csr_flags */\
2683 op_encode_channel_attrs_maxsz + \
2684 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2685}
2686
2687static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2688{
2689 return (op_encode_hdr_size +
2690 1 /* wr_callback */ +
2691 op_encode_stateid_maxsz /* wr_callback */ +
2692 2 /* wr_count */ +
2693 1 /* wr_committed */ +
2694 op_encode_verifier_maxsz +
2695 1 /* cr_consecutive */ +
2696 1 /* cr_synchronous */) * sizeof(__be32);
2697}
2698
2699static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2700 struct nfsd4_op *op)
2701{
2702 return (op_encode_hdr_size +
2703 2 /* osr_count */ +
2704 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2705}
2706
2707static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2708 struct nfsd4_op *op)
2709{
2710 return (op_encode_hdr_size +
2711 3 /* cnr_lease_time */ +
2712 1 /* We support one cnr_source_server */ +
2713 1 /* cnr_stateid seq */ +
2714 op_encode_stateid_maxsz /* cnr_stateid */ +
2715 1 /* num cnr_source_server*/ +
2716 1 /* nl4_type */ +
2717 1 /* nl4 size */ +
2718 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2719 * sizeof(__be32);
2720}
2721
2722#ifdef CONFIG_NFSD_PNFS
2723static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2724{
2725 u32 maxcount = 0, rlen = 0;
2726
2727 maxcount = svc_max_payload(rqstp);
2728 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2729
2730 return (op_encode_hdr_size +
2731 1 /* gd_layout_type*/ +
2732 XDR_QUADLEN(rlen) +
2733 2 /* gd_notify_types */) * sizeof(__be32);
2734}
2735
2736/*
2737 * At this stage we don't really know what layout driver will handle the request,
2738 * so we need to define an arbitrary upper bound here.
2739 */
2740#define MAX_LAYOUT_SIZE 128
2741static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2742{
2743 return (op_encode_hdr_size +
2744 1 /* logr_return_on_close */ +
2745 op_encode_stateid_maxsz +
2746 1 /* nr of layouts */ +
2747 MAX_LAYOUT_SIZE) * sizeof(__be32);
2748}
2749
2750static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2751{
2752 return (op_encode_hdr_size +
2753 1 /* locr_newsize */ +
2754 2 /* ns_size */) * sizeof(__be32);
2755}
2756
2757static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2758{
2759 return (op_encode_hdr_size +
2760 1 /* lrs_stateid */ +
2761 op_encode_stateid_maxsz) * sizeof(__be32);
2762}
2763#endif /* CONFIG_NFSD_PNFS */
2764
2765
2766static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2767{
2768 return (op_encode_hdr_size + 3) * sizeof(__be32);
2769}
2770
2771static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2772 struct nfsd4_op *op)
2773{
2774 u32 maxcount, rlen;
2775
2776 maxcount = svc_max_payload(rqstp);
2777 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2778
2779 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2780}
2781
2782static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2783 struct nfsd4_op *op)
2784{
2785 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2786 * sizeof(__be32);
2787}
2788static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2789 struct nfsd4_op *op)
2790{
2791 u32 maxcount, rlen;
2792
2793 maxcount = svc_max_payload(rqstp);
2794 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2795
2796 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2797}
2798
2799static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2800 struct nfsd4_op *op)
2801{
2802 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2803 * sizeof(__be32);
2804}
2805
2806
2807static const struct nfsd4_operation nfsd4_ops[] = {
2808 [OP_ACCESS] = {
2809 .op_func = nfsd4_access,
2810 .op_name = "OP_ACCESS",
2811 .op_rsize_bop = nfsd4_access_rsize,
2812 },
2813 [OP_CLOSE] = {
2814 .op_func = nfsd4_close,
2815 .op_flags = OP_MODIFIES_SOMETHING,
2816 .op_name = "OP_CLOSE",
2817 .op_rsize_bop = nfsd4_status_stateid_rsize,
2818 .op_get_currentstateid = nfsd4_get_closestateid,
2819 .op_set_currentstateid = nfsd4_set_closestateid,
2820 },
2821 [OP_COMMIT] = {
2822 .op_func = nfsd4_commit,
2823 .op_flags = OP_MODIFIES_SOMETHING,
2824 .op_name = "OP_COMMIT",
2825 .op_rsize_bop = nfsd4_commit_rsize,
2826 },
2827 [OP_CREATE] = {
2828 .op_func = nfsd4_create,
2829 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2830 .op_name = "OP_CREATE",
2831 .op_rsize_bop = nfsd4_create_rsize,
2832 },
2833 [OP_DELEGRETURN] = {
2834 .op_func = nfsd4_delegreturn,
2835 .op_flags = OP_MODIFIES_SOMETHING,
2836 .op_name = "OP_DELEGRETURN",
2837 .op_rsize_bop = nfsd4_only_status_rsize,
2838 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2839 },
2840 [OP_GETATTR] = {
2841 .op_func = nfsd4_getattr,
2842 .op_flags = ALLOWED_ON_ABSENT_FS,
2843 .op_rsize_bop = nfsd4_getattr_rsize,
2844 .op_name = "OP_GETATTR",
2845 },
2846 [OP_GETFH] = {
2847 .op_func = nfsd4_getfh,
2848 .op_name = "OP_GETFH",
2849 .op_rsize_bop = nfsd4_getfh_rsize,
2850 },
2851 [OP_LINK] = {
2852 .op_func = nfsd4_link,
2853 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2854 | OP_CACHEME,
2855 .op_name = "OP_LINK",
2856 .op_rsize_bop = nfsd4_link_rsize,
2857 },
2858 [OP_LOCK] = {
2859 .op_func = nfsd4_lock,
2860 .op_flags = OP_MODIFIES_SOMETHING |
2861 OP_NONTRIVIAL_ERROR_ENCODE,
2862 .op_name = "OP_LOCK",
2863 .op_rsize_bop = nfsd4_lock_rsize,
2864 .op_set_currentstateid = nfsd4_set_lockstateid,
2865 },
2866 [OP_LOCKT] = {
2867 .op_func = nfsd4_lockt,
2868 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2869 .op_name = "OP_LOCKT",
2870 .op_rsize_bop = nfsd4_lock_rsize,
2871 },
2872 [OP_LOCKU] = {
2873 .op_func = nfsd4_locku,
2874 .op_flags = OP_MODIFIES_SOMETHING,
2875 .op_name = "OP_LOCKU",
2876 .op_rsize_bop = nfsd4_status_stateid_rsize,
2877 .op_get_currentstateid = nfsd4_get_lockustateid,
2878 },
2879 [OP_LOOKUP] = {
2880 .op_func = nfsd4_lookup,
2881 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2882 .op_name = "OP_LOOKUP",
2883 .op_rsize_bop = nfsd4_only_status_rsize,
2884 },
2885 [OP_LOOKUPP] = {
2886 .op_func = nfsd4_lookupp,
2887 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2888 .op_name = "OP_LOOKUPP",
2889 .op_rsize_bop = nfsd4_only_status_rsize,
2890 },
2891 [OP_NVERIFY] = {
2892 .op_func = nfsd4_nverify,
2893 .op_name = "OP_NVERIFY",
2894 .op_rsize_bop = nfsd4_only_status_rsize,
2895 },
2896 [OP_OPEN] = {
2897 .op_func = nfsd4_open,
2898 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2899 .op_name = "OP_OPEN",
2900 .op_rsize_bop = nfsd4_open_rsize,
2901 .op_set_currentstateid = nfsd4_set_openstateid,
2902 },
2903 [OP_OPEN_CONFIRM] = {
2904 .op_func = nfsd4_open_confirm,
2905 .op_flags = OP_MODIFIES_SOMETHING,
2906 .op_name = "OP_OPEN_CONFIRM",
2907 .op_rsize_bop = nfsd4_status_stateid_rsize,
2908 },
2909 [OP_OPEN_DOWNGRADE] = {
2910 .op_func = nfsd4_open_downgrade,
2911 .op_flags = OP_MODIFIES_SOMETHING,
2912 .op_name = "OP_OPEN_DOWNGRADE",
2913 .op_rsize_bop = nfsd4_status_stateid_rsize,
2914 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2915 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2916 },
2917 [OP_PUTFH] = {
2918 .op_func = nfsd4_putfh,
2919 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2920 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2921 .op_name = "OP_PUTFH",
2922 .op_rsize_bop = nfsd4_only_status_rsize,
2923 },
2924 [OP_PUTPUBFH] = {
2925 .op_func = nfsd4_putrootfh,
2926 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2927 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2928 .op_name = "OP_PUTPUBFH",
2929 .op_rsize_bop = nfsd4_only_status_rsize,
2930 },
2931 [OP_PUTROOTFH] = {
2932 .op_func = nfsd4_putrootfh,
2933 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2934 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2935 .op_name = "OP_PUTROOTFH",
2936 .op_rsize_bop = nfsd4_only_status_rsize,
2937 },
2938 [OP_READ] = {
2939 .op_func = nfsd4_read,
2940 .op_release = nfsd4_read_release,
2941 .op_name = "OP_READ",
2942 .op_rsize_bop = nfsd4_read_rsize,
2943 .op_get_currentstateid = nfsd4_get_readstateid,
2944 },
2945 [OP_READDIR] = {
2946 .op_func = nfsd4_readdir,
2947 .op_name = "OP_READDIR",
2948 .op_rsize_bop = nfsd4_readdir_rsize,
2949 },
2950 [OP_READLINK] = {
2951 .op_func = nfsd4_readlink,
2952 .op_name = "OP_READLINK",
2953 .op_rsize_bop = nfsd4_readlink_rsize,
2954 },
2955 [OP_REMOVE] = {
2956 .op_func = nfsd4_remove,
2957 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2958 .op_name = "OP_REMOVE",
2959 .op_rsize_bop = nfsd4_remove_rsize,
2960 },
2961 [OP_RENAME] = {
2962 .op_func = nfsd4_rename,
2963 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2964 .op_name = "OP_RENAME",
2965 .op_rsize_bop = nfsd4_rename_rsize,
2966 },
2967 [OP_RENEW] = {
2968 .op_func = nfsd4_renew,
2969 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2970 | OP_MODIFIES_SOMETHING,
2971 .op_name = "OP_RENEW",
2972 .op_rsize_bop = nfsd4_only_status_rsize,
2973
2974 },
2975 [OP_RESTOREFH] = {
2976 .op_func = nfsd4_restorefh,
2977 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2978 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2979 .op_name = "OP_RESTOREFH",
2980 .op_rsize_bop = nfsd4_only_status_rsize,
2981 },
2982 [OP_SAVEFH] = {
2983 .op_func = nfsd4_savefh,
2984 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2985 .op_name = "OP_SAVEFH",
2986 .op_rsize_bop = nfsd4_only_status_rsize,
2987 },
2988 [OP_SECINFO] = {
2989 .op_func = nfsd4_secinfo,
2990 .op_release = nfsd4_secinfo_release,
2991 .op_flags = OP_HANDLES_WRONGSEC,
2992 .op_name = "OP_SECINFO",
2993 .op_rsize_bop = nfsd4_secinfo_rsize,
2994 },
2995 [OP_SETATTR] = {
2996 .op_func = nfsd4_setattr,
2997 .op_name = "OP_SETATTR",
2998 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2999 | OP_NONTRIVIAL_ERROR_ENCODE,
3000 .op_rsize_bop = nfsd4_setattr_rsize,
3001 .op_get_currentstateid = nfsd4_get_setattrstateid,
3002 },
3003 [OP_SETCLIENTID] = {
3004 .op_func = nfsd4_setclientid,
3005 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3006 | OP_MODIFIES_SOMETHING | OP_CACHEME
3007 | OP_NONTRIVIAL_ERROR_ENCODE,
3008 .op_name = "OP_SETCLIENTID",
3009 .op_rsize_bop = nfsd4_setclientid_rsize,
3010 },
3011 [OP_SETCLIENTID_CONFIRM] = {
3012 .op_func = nfsd4_setclientid_confirm,
3013 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3014 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3015 .op_name = "OP_SETCLIENTID_CONFIRM",
3016 .op_rsize_bop = nfsd4_only_status_rsize,
3017 },
3018 [OP_VERIFY] = {
3019 .op_func = nfsd4_verify,
3020 .op_name = "OP_VERIFY",
3021 .op_rsize_bop = nfsd4_only_status_rsize,
3022 },
3023 [OP_WRITE] = {
3024 .op_func = nfsd4_write,
3025 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3026 .op_name = "OP_WRITE",
3027 .op_rsize_bop = nfsd4_write_rsize,
3028 .op_get_currentstateid = nfsd4_get_writestateid,
3029 },
3030 [OP_RELEASE_LOCKOWNER] = {
3031 .op_func = nfsd4_release_lockowner,
3032 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3033 | OP_MODIFIES_SOMETHING,
3034 .op_name = "OP_RELEASE_LOCKOWNER",
3035 .op_rsize_bop = nfsd4_only_status_rsize,
3036 },
3037
3038 /* NFSv4.1 operations */
3039 [OP_EXCHANGE_ID] = {
3040 .op_func = nfsd4_exchange_id,
3041 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3042 | OP_MODIFIES_SOMETHING,
3043 .op_name = "OP_EXCHANGE_ID",
3044 .op_rsize_bop = nfsd4_exchange_id_rsize,
3045 },
3046 [OP_BACKCHANNEL_CTL] = {
3047 .op_func = nfsd4_backchannel_ctl,
3048 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3049 .op_name = "OP_BACKCHANNEL_CTL",
3050 .op_rsize_bop = nfsd4_only_status_rsize,
3051 },
3052 [OP_BIND_CONN_TO_SESSION] = {
3053 .op_func = nfsd4_bind_conn_to_session,
3054 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3055 | OP_MODIFIES_SOMETHING,
3056 .op_name = "OP_BIND_CONN_TO_SESSION",
3057 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3058 },
3059 [OP_CREATE_SESSION] = {
3060 .op_func = nfsd4_create_session,
3061 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3062 | OP_MODIFIES_SOMETHING,
3063 .op_name = "OP_CREATE_SESSION",
3064 .op_rsize_bop = nfsd4_create_session_rsize,
3065 },
3066 [OP_DESTROY_SESSION] = {
3067 .op_func = nfsd4_destroy_session,
3068 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3069 | OP_MODIFIES_SOMETHING,
3070 .op_name = "OP_DESTROY_SESSION",
3071 .op_rsize_bop = nfsd4_only_status_rsize,
3072 },
3073 [OP_SEQUENCE] = {
3074 .op_func = nfsd4_sequence,
3075 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3076 .op_name = "OP_SEQUENCE",
3077 .op_rsize_bop = nfsd4_sequence_rsize,
3078 },
3079 [OP_DESTROY_CLIENTID] = {
3080 .op_func = nfsd4_destroy_clientid,
3081 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3082 | OP_MODIFIES_SOMETHING,
3083 .op_name = "OP_DESTROY_CLIENTID",
3084 .op_rsize_bop = nfsd4_only_status_rsize,
3085 },
3086 [OP_RECLAIM_COMPLETE] = {
3087 .op_func = nfsd4_reclaim_complete,
3088 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3089 .op_name = "OP_RECLAIM_COMPLETE",
3090 .op_rsize_bop = nfsd4_only_status_rsize,
3091 },
3092 [OP_SECINFO_NO_NAME] = {
3093 .op_func = nfsd4_secinfo_no_name,
3094 .op_release = nfsd4_secinfo_no_name_release,
3095 .op_flags = OP_HANDLES_WRONGSEC,
3096 .op_name = "OP_SECINFO_NO_NAME",
3097 .op_rsize_bop = nfsd4_secinfo_rsize,
3098 },
3099 [OP_TEST_STATEID] = {
3100 .op_func = nfsd4_test_stateid,
3101 .op_flags = ALLOWED_WITHOUT_FH,
3102 .op_name = "OP_TEST_STATEID",
3103 .op_rsize_bop = nfsd4_test_stateid_rsize,
3104 },
3105 [OP_FREE_STATEID] = {
3106 .op_func = nfsd4_free_stateid,
3107 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3108 .op_name = "OP_FREE_STATEID",
3109 .op_get_currentstateid = nfsd4_get_freestateid,
3110 .op_rsize_bop = nfsd4_only_status_rsize,
3111 },
3112#ifdef CONFIG_NFSD_PNFS
3113 [OP_GETDEVICEINFO] = {
3114 .op_func = nfsd4_getdeviceinfo,
3115 .op_release = nfsd4_getdeviceinfo_release,
3116 .op_flags = ALLOWED_WITHOUT_FH,
3117 .op_name = "OP_GETDEVICEINFO",
3118 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3119 },
3120 [OP_LAYOUTGET] = {
3121 .op_func = nfsd4_layoutget,
3122 .op_release = nfsd4_layoutget_release,
3123 .op_flags = OP_MODIFIES_SOMETHING,
3124 .op_name = "OP_LAYOUTGET",
3125 .op_rsize_bop = nfsd4_layoutget_rsize,
3126 },
3127 [OP_LAYOUTCOMMIT] = {
3128 .op_func = nfsd4_layoutcommit,
3129 .op_flags = OP_MODIFIES_SOMETHING,
3130 .op_name = "OP_LAYOUTCOMMIT",
3131 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3132 },
3133 [OP_LAYOUTRETURN] = {
3134 .op_func = nfsd4_layoutreturn,
3135 .op_flags = OP_MODIFIES_SOMETHING,
3136 .op_name = "OP_LAYOUTRETURN",
3137 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3138 },
3139#endif /* CONFIG_NFSD_PNFS */
3140
3141 /* NFSv4.2 operations */
3142 [OP_ALLOCATE] = {
3143 .op_func = nfsd4_allocate,
3144 .op_flags = OP_MODIFIES_SOMETHING,
3145 .op_name = "OP_ALLOCATE",
3146 .op_rsize_bop = nfsd4_only_status_rsize,
3147 },
3148 [OP_DEALLOCATE] = {
3149 .op_func = nfsd4_deallocate,
3150 .op_flags = OP_MODIFIES_SOMETHING,
3151 .op_name = "OP_DEALLOCATE",
3152 .op_rsize_bop = nfsd4_only_status_rsize,
3153 },
3154 [OP_CLONE] = {
3155 .op_func = nfsd4_clone,
3156 .op_flags = OP_MODIFIES_SOMETHING,
3157 .op_name = "OP_CLONE",
3158 .op_rsize_bop = nfsd4_only_status_rsize,
3159 },
3160 [OP_COPY] = {
3161 .op_func = nfsd4_copy,
3162 .op_flags = OP_MODIFIES_SOMETHING,
3163 .op_name = "OP_COPY",
3164 .op_rsize_bop = nfsd4_copy_rsize,
3165 },
3166 [OP_SEEK] = {
3167 .op_func = nfsd4_seek,
3168 .op_name = "OP_SEEK",
3169 .op_rsize_bop = nfsd4_seek_rsize,
3170 },
3171 [OP_OFFLOAD_STATUS] = {
3172 .op_func = nfsd4_offload_status,
3173 .op_name = "OP_OFFLOAD_STATUS",
3174 .op_rsize_bop = nfsd4_offload_status_rsize,
3175 },
3176 [OP_OFFLOAD_CANCEL] = {
3177 .op_func = nfsd4_offload_cancel,
3178 .op_flags = OP_MODIFIES_SOMETHING,
3179 .op_name = "OP_OFFLOAD_CANCEL",
3180 .op_rsize_bop = nfsd4_only_status_rsize,
3181 },
3182 [OP_COPY_NOTIFY] = {
3183 .op_func = nfsd4_copy_notify,
3184 .op_flags = OP_MODIFIES_SOMETHING,
3185 .op_name = "OP_COPY_NOTIFY",
3186 .op_rsize_bop = nfsd4_copy_notify_rsize,
3187 },
3188 [OP_GETXATTR] = {
3189 .op_func = nfsd4_getxattr,
3190 .op_name = "OP_GETXATTR",
3191 .op_rsize_bop = nfsd4_getxattr_rsize,
3192 },
3193 [OP_SETXATTR] = {
3194 .op_func = nfsd4_setxattr,
3195 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3196 .op_name = "OP_SETXATTR",
3197 .op_rsize_bop = nfsd4_setxattr_rsize,
3198 },
3199 [OP_LISTXATTRS] = {
3200 .op_func = nfsd4_listxattrs,
3201 .op_name = "OP_LISTXATTRS",
3202 .op_rsize_bop = nfsd4_listxattrs_rsize,
3203 },
3204 [OP_REMOVEXATTR] = {
3205 .op_func = nfsd4_removexattr,
3206 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3207 .op_name = "OP_REMOVEXATTR",
3208 .op_rsize_bop = nfsd4_removexattr_rsize,
3209 },
3210};
3211
3212/**
3213 * nfsd4_spo_must_allow - Determine if the compound op contains an
3214 * operation that is allowed to be sent with machine credentials
3215 *
3216 * @rqstp: a pointer to the struct svc_rqst
3217 *
3218 * Checks to see if the compound contains a spo_must_allow op
3219 * and confirms that it was sent with the proper machine creds.
3220 */
3221
3222bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3223{
3224 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3225 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3226 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3227 struct nfsd4_compound_state *cstate = &resp->cstate;
3228 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3229 u32 opiter;
3230
3231 if (!cstate->minorversion)
3232 return false;
3233
3234 if (cstate->spo_must_allowed == true)
3235 return true;
3236
3237 opiter = resp->opcnt;
3238 while (opiter < argp->opcnt) {
3239 this = &argp->ops[opiter++];
3240 if (test_bit(this->opnum, allow->u.longs) &&
3241 cstate->clp->cl_mach_cred &&
3242 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3243 cstate->spo_must_allowed = true;
3244 return true;
3245 }
3246 }
3247 cstate->spo_must_allowed = false;
3248 return false;
3249}
3250
3251int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3252{
3253 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3254 return op_encode_hdr_size * sizeof(__be32);
3255
3256 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3257 return OPDESC(op)->op_rsize_bop(rqstp, op);
3258}
3259
3260void warn_on_nonidempotent_op(struct nfsd4_op *op)
3261{
3262 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3263 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
3264 op->opnum, nfsd4_op_name(op->opnum));
3265 WARN_ON_ONCE(1);
3266 }
3267}
3268
3269static const char *nfsd4_op_name(unsigned opnum)
3270{
3271 if (opnum < ARRAY_SIZE(nfsd4_ops))
3272 return nfsd4_ops[opnum].op_name;
3273 return "unknown_operation";
3274}
3275
3276#define nfsd4_voidres nfsd4_voidargs
3277struct nfsd4_voidargs { int dummy; };
3278
3279static const struct svc_procedure nfsd_procedures4[2] = {
3280 [NFSPROC4_NULL] = {
3281 .pc_func = nfsd4_proc_null,
3282 .pc_encode = nfs4svc_encode_voidres,
3283 .pc_argsize = sizeof(struct nfsd4_voidargs),
3284 .pc_ressize = sizeof(struct nfsd4_voidres),
3285 .pc_cachetype = RC_NOCACHE,
3286 .pc_xdrressize = 1,
3287 },
3288 [NFSPROC4_COMPOUND] = {
3289 .pc_func = nfsd4_proc_compound,
3290 .pc_decode = nfs4svc_decode_compoundargs,
3291 .pc_encode = nfs4svc_encode_compoundres,
3292 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3293 .pc_ressize = sizeof(struct nfsd4_compoundres),
3294 .pc_release = nfsd4_release_compoundargs,
3295 .pc_cachetype = RC_NOCACHE,
3296 .pc_xdrressize = NFSD_BUFSIZE/4,
3297 },
3298};
3299
3300static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3301const struct svc_version nfsd_version4 = {
3302 .vs_vers = 4,
3303 .vs_nproc = 2,
3304 .vs_proc = nfsd_procedures4,
3305 .vs_count = nfsd_count3,
3306 .vs_dispatch = nfsd_dispatch,
3307 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3308 .vs_rpcb_optnl = true,
3309 .vs_need_cong_ctrl = true,
3310};
3311
3312/*
3313 * Local variables:
3314 * c-basic-offset: 8
3315 * End:
3316 */