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Linux 3.12.28
[linux/fpc-iii.git] / fs / nfsd / nfs4proc.c
blob08c8e023c157c57a8ae084af8a447e31c0dea33e
1 /*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42 #include "current_stateid.h"
43 #include "netns.h"
44
45 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
46 #include <linux/security.h>
47
48 static inline void
49 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
50 {
51 struct inode *inode = resfh->fh_dentry->d_inode;
52 int status;
53
54 mutex_lock(&inode->i_mutex);
55 status = security_inode_setsecctx(resfh->fh_dentry,
56 label->data, label->len);
57 mutex_unlock(&inode->i_mutex);
58
59 if (status)
60 /*
61 * XXX: We should really fail the whole open, but we may
62 * already have created a new file, so it may be too
63 * late. For now this seems the least of evils:
64 */
65 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
66
67 return;
68 }
69 #else
70 static inline void
71 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
72 { }
73 #endif
74
75 #define NFSDDBG_FACILITY NFSDDBG_PROC
76
77 static u32 nfsd_attrmask[] = {
78 NFSD_WRITEABLE_ATTRS_WORD0,
79 NFSD_WRITEABLE_ATTRS_WORD1,
80 NFSD_WRITEABLE_ATTRS_WORD2
81 };
82
83 static u32 nfsd41_ex_attrmask[] = {
84 NFSD_SUPPATTR_EXCLCREAT_WORD0,
85 NFSD_SUPPATTR_EXCLCREAT_WORD1,
86 NFSD_SUPPATTR_EXCLCREAT_WORD2
87 };
88
89 static __be32
90 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
91 u32 *bmval, u32 *writable)
92 {
93 struct dentry *dentry = cstate->current_fh.fh_dentry;
94
95 /*
96 * Check about attributes are supported by the NFSv4 server or not.
97 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
98 */
99 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
100 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
101 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
102 return nfserr_attrnotsupp;
103
104 /*
105 * Check FATTR4_WORD0_ACL can be supported
106 * in current environment or not.
107 */
108 if (bmval[0] & FATTR4_WORD0_ACL) {
109 if (!IS_POSIXACL(dentry->d_inode))
110 return nfserr_attrnotsupp;
111 }
112
113 /*
114 * According to spec, read-only attributes return ERR_INVAL.
115 */
116 if (writable) {
117 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
118 (bmval[2] & ~writable[2]))
119 return nfserr_inval;
120 }
121
122 return nfs_ok;
123 }
124
125 static __be32
126 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
127 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
128 {
129 __be32 status = nfs_ok;
130
131 if (open->op_create == NFS4_OPEN_CREATE) {
132 if (open->op_createmode == NFS4_CREATE_UNCHECKED
133 || open->op_createmode == NFS4_CREATE_GUARDED)
134 status = check_attr_support(rqstp, cstate,
135 open->op_bmval, nfsd_attrmask);
136 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
137 status = check_attr_support(rqstp, cstate,
138 open->op_bmval, nfsd41_ex_attrmask);
139 }
140
141 return status;
142 }
143
144 static int
145 is_create_with_attrs(struct nfsd4_open *open)
146 {
147 return open->op_create == NFS4_OPEN_CREATE
148 && (open->op_createmode == NFS4_CREATE_UNCHECKED
149 || open->op_createmode == NFS4_CREATE_GUARDED
150 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
151 }
152
153 /*
154 * if error occurs when setting the acl, just clear the acl bit
155 * in the returned attr bitmap.
156 */
157 static void
158 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
159 struct nfs4_acl *acl, u32 *bmval)
160 {
161 __be32 status;
162
163 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
164 if (status)
165 /*
166 * We should probably fail the whole open at this point,
167 * but we've already created the file, so it's too late;
168 * So this seems the least of evils:
169 */
170 bmval[0] &= ~FATTR4_WORD0_ACL;
171 }
172
173 static inline void
174 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
175 {
176 fh_put(dst);
177 dget(src->fh_dentry);
178 if (src->fh_export)
179 cache_get(&src->fh_export->h);
180 *dst = *src;
181 }
182
183 static __be32
184 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
185 {
186 __be32 status;
187
188 if (open->op_truncate &&
189 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
190 return nfserr_inval;
191
192 accmode |= NFSD_MAY_READ_IF_EXEC;
193
194 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
195 accmode |= NFSD_MAY_READ;
196 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
197 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
198 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
199 accmode |= NFSD_MAY_WRITE;
200
201 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
202
203 return status;
204 }
205
206 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
207 {
208 umode_t mode = fh->fh_dentry->d_inode->i_mode;
209
210 if (S_ISREG(mode))
211 return nfs_ok;
212 if (S_ISDIR(mode))
213 return nfserr_isdir;
214 /*
215 * Using err_symlink as our catch-all case may look odd; but
216 * there's no other obvious error for this case in 4.0, and we
217 * happen to know that it will cause the linux v4 client to do
218 * the right thing on attempts to open something other than a
219 * regular file.
220 */
221 return nfserr_symlink;
222 }
223
224 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
225 {
226 if (nfsd4_has_session(cstate))
227 return;
228 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
229 &resfh->fh_handle);
230 }
231
232 static __be32
233 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
234 {
235 struct svc_fh *current_fh = &cstate->current_fh;
236 struct svc_fh *resfh;
237 int accmode;
238 __be32 status;
239
240 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
241 if (!resfh)
242 return nfserr_jukebox;
243 fh_init(resfh, NFS4_FHSIZE);
244 open->op_truncate = 0;
245
246 if (open->op_create) {
247 /* FIXME: check session persistence and pnfs flags.
248 * The nfsv4.1 spec requires the following semantics:
249 *
250 * Persistent | pNFS | Server REQUIRED | Client Allowed
251 * Reply Cache | server | |
252 * -------------+--------+-----------------+--------------------
253 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
254 * | | | (SHOULD)
255 * | | and EXCLUSIVE4 | or EXCLUSIVE4
256 * | | | (SHOULD NOT)
257 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
258 * yes | no | GUARDED4 | GUARDED4
259 * yes | yes | GUARDED4 | GUARDED4
260 */
261
262 /*
263 * Note: create modes (UNCHECKED,GUARDED...) are the same
264 * in NFSv4 as in v3 except EXCLUSIVE4_1.
265 */
266 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
267 open->op_fname.len, &open->op_iattr,
268 resfh, open->op_createmode,
269 (u32 *)open->op_verf.data,
270 &open->op_truncate, &open->op_created);
271
272 if (!status && open->op_label.len)
273 nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval);
274
275 /*
276 * Following rfc 3530 14.2.16, use the returned bitmask
277 * to indicate which attributes we used to store the
278 * verifier:
279 */
280 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
281 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
282 FATTR4_WORD1_TIME_MODIFY);
283 } else {
284 status = nfsd_lookup(rqstp, current_fh,
285 open->op_fname.data, open->op_fname.len, resfh);
286 fh_unlock(current_fh);
287 }
288 if (status)
289 goto out;
290 status = nfsd_check_obj_isreg(resfh);
291 if (status)
292 goto out;
293
294 if (is_create_with_attrs(open) && open->op_acl != NULL)
295 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
296
297 nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
298 accmode = NFSD_MAY_NOP;
299 if (open->op_created ||
300 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
301 accmode |= NFSD_MAY_OWNER_OVERRIDE;
302 status = do_open_permission(rqstp, resfh, open, accmode);
303 set_change_info(&open->op_cinfo, current_fh);
304 fh_dup2(current_fh, resfh);
305 out:
306 fh_put(resfh);
307 kfree(resfh);
308 return status;
309 }
310
311 static __be32
312 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
313 {
314 struct svc_fh *current_fh = &cstate->current_fh;
315 __be32 status;
316 int accmode = 0;
317
318 /* We don't know the target directory, and therefore can not
319 * set the change info
320 */
321
322 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
323
324 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
325
326 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
327 (open->op_iattr.ia_size == 0);
328 /*
329 * In the delegation case, the client is telling us about an
330 * open that it *already* performed locally, some time ago. We
331 * should let it succeed now if possible.
332 *
333 * In the case of a CLAIM_FH open, on the other hand, the client
334 * may be counting on us to enforce permissions (the Linux 4.1
335 * client uses this for normal opens, for example).
336 */
337 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
338 accmode = NFSD_MAY_OWNER_OVERRIDE;
339
340 status = do_open_permission(rqstp, current_fh, open, accmode);
341
342 return status;
343 }
344
345 static void
346 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
347 {
348 struct nfsd4_sessionid *sid =
349 (struct nfsd4_sessionid *)session->se_sessionid.data;
350
351 clid->cl_boot = sid->clientid.cl_boot;
352 clid->cl_id = sid->clientid.cl_id;
353 }
354
355 static __be32
356 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
357 struct nfsd4_open *open)
358 {
359 __be32 status;
360 struct nfsd4_compoundres *resp;
361 struct net *net = SVC_NET(rqstp);
362 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
363
364 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
365 (int)open->op_fname.len, open->op_fname.data,
366 open->op_openowner);
367
368 /* This check required by spec. */
369 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
370 return nfserr_inval;
371
372 open->op_created = 0;
373 /*
374 * RFC5661 18.51.3
375 * Before RECLAIM_COMPLETE done, server should deny new lock
376 */
377 if (nfsd4_has_session(cstate) &&
378 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
379 &cstate->session->se_client->cl_flags) &&
380 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
381 return nfserr_grace;
382
383 if (nfsd4_has_session(cstate))
384 copy_clientid(&open->op_clientid, cstate->session);
385
386 nfs4_lock_state();
387
388 /* check seqid for replay. set nfs4_owner */
389 resp = rqstp->rq_resp;
390 status = nfsd4_process_open1(&resp->cstate, open, nn);
391 if (status == nfserr_replay_me) {
392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
393 fh_put(&cstate->current_fh);
394 fh_copy_shallow(&cstate->current_fh.fh_handle,
395 &rp->rp_openfh);
396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
397 if (status)
398 dprintk("nfsd4_open: replay failed"
399 " restoring previous filehandle\n");
400 else
401 status = nfserr_replay_me;
402 }
403 if (status)
404 goto out;
405 if (open->op_xdr_error) {
406 status = open->op_xdr_error;
407 goto out;
408 }
409
410 status = nfsd4_check_open_attributes(rqstp, cstate, open);
411 if (status)
412 goto out;
413
414 /* Openowner is now set, so sequence id will get bumped. Now we need
415 * these checks before we do any creates: */
416 status = nfserr_grace;
417 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
418 goto out;
419 status = nfserr_no_grace;
420 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
421 goto out;
422
423 switch (open->op_claim_type) {
424 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
425 case NFS4_OPEN_CLAIM_NULL:
426 status = do_open_lookup(rqstp, cstate, open);
427 if (status)
428 goto out;
429 break;
430 case NFS4_OPEN_CLAIM_PREVIOUS:
431 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
432 status = nfs4_check_open_reclaim(&open->op_clientid,
433 cstate->minorversion,
434 nn);
435 if (status)
436 goto out;
437 case NFS4_OPEN_CLAIM_FH:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
439 status = do_open_fhandle(rqstp, cstate, open);
440 if (status)
441 goto out;
442 break;
443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
444 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
445 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
446 dprintk("NFSD: unsupported OPEN claim type %d\n",
447 open->op_claim_type);
448 status = nfserr_notsupp;
449 goto out;
450 default:
451 dprintk("NFSD: Invalid OPEN claim type %d\n",
452 open->op_claim_type);
453 status = nfserr_inval;
454 goto out;
455 }
456 /*
457 * nfsd4_process_open2() does the actual opening of the file. If
458 * successful, it (1) truncates the file if open->op_truncate was
459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
460 */
461 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
462 WARN_ON(status && open->op_created);
463 out:
464 nfsd4_cleanup_open_state(open, status);
465 if (open->op_openowner && !nfsd4_has_session(cstate))
466 cstate->replay_owner = &open->op_openowner->oo_owner;
467 nfsd4_bump_seqid(cstate, status);
468 if (!cstate->replay_owner)
469 nfs4_unlock_state();
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 */
479 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
480 {
481 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
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, open);
489 }
490
491 /*
492 * filehandle-manipulating ops.
493 */
494 static __be32
495 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
496 struct svc_fh **getfh)
497 {
498 if (!cstate->current_fh.fh_dentry)
499 return nfserr_nofilehandle;
500
501 *getfh = &cstate->current_fh;
502 return nfs_ok;
503 }
504
505 static __be32
506 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
507 struct nfsd4_putfh *putfh)
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 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
514 }
515
516 static __be32
517 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
518 void *arg)
519 {
520 __be32 status;
521
522 fh_put(&cstate->current_fh);
523 status = exp_pseudoroot(rqstp, &cstate->current_fh);
524 return status;
525 }
526
527 static __be32
528 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 void *arg)
530 {
531 if (!cstate->save_fh.fh_dentry)
532 return nfserr_restorefh;
533
534 fh_dup2(&cstate->current_fh, &cstate->save_fh);
535 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
536 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
537 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
538 }
539 return nfs_ok;
540 }
541
542 static __be32
543 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
544 void *arg)
545 {
546 if (!cstate->current_fh.fh_dentry)
547 return nfserr_nofilehandle;
548
549 fh_dup2(&cstate->save_fh, &cstate->current_fh);
550 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
551 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
552 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
553 }
554 return nfs_ok;
555 }
556
557 /*
558 * misc nfsv4 ops
559 */
560 static __be32
561 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
562 struct nfsd4_access *access)
563 {
564 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
565 return nfserr_inval;
566
567 access->ac_resp_access = access->ac_req_access;
568 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
569 &access->ac_supported);
570 }
571
572 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
573 {
574 __be32 verf[2];
575 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
576
577 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
578 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
579 memcpy(verifier->data, verf, sizeof(verifier->data));
580 }
581
582 static __be32
583 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
584 struct nfsd4_commit *commit)
585 {
586 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
587 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
588 commit->co_count);
589 }
590
591 static __be32
592 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
593 struct nfsd4_create *create)
594 {
595 struct svc_fh resfh;
596 __be32 status;
597 dev_t rdev;
598
599 fh_init(&resfh, NFS4_FHSIZE);
600
601 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
602 NFSD_MAY_CREATE);
603 if (status)
604 return status;
605
606 status = check_attr_support(rqstp, cstate, create->cr_bmval,
607 nfsd_attrmask);
608 if (status)
609 return status;
610
611 switch (create->cr_type) {
612 case NF4LNK:
613 status = nfsd_symlink(rqstp, &cstate->current_fh,
614 create->cr_name, create->cr_namelen,
615 create->cr_linkname, create->cr_linklen,
616 &resfh, &create->cr_iattr);
617 break;
618
619 case NF4BLK:
620 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
621 if (MAJOR(rdev) != create->cr_specdata1 ||
622 MINOR(rdev) != create->cr_specdata2)
623 return nfserr_inval;
624 status = nfsd_create(rqstp, &cstate->current_fh,
625 create->cr_name, create->cr_namelen,
626 &create->cr_iattr, S_IFBLK, rdev, &resfh);
627 break;
628
629 case NF4CHR:
630 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
631 if (MAJOR(rdev) != create->cr_specdata1 ||
632 MINOR(rdev) != create->cr_specdata2)
633 return nfserr_inval;
634 status = nfsd_create(rqstp, &cstate->current_fh,
635 create->cr_name, create->cr_namelen,
636 &create->cr_iattr,S_IFCHR, rdev, &resfh);
637 break;
638
639 case NF4SOCK:
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFSOCK, 0, &resfh);
643 break;
644
645 case NF4FIFO:
646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFIFO, 0, &resfh);
649 break;
650
651 case NF4DIR:
652 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
653 status = nfsd_create(rqstp, &cstate->current_fh,
654 create->cr_name, create->cr_namelen,
655 &create->cr_iattr, S_IFDIR, 0, &resfh);
656 break;
657
658 default:
659 status = nfserr_badtype;
660 }
661
662 if (status)
663 goto out;
664
665 if (create->cr_label.len)
666 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
667
668 if (create->cr_acl != NULL)
669 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
670 create->cr_bmval);
671
672 fh_unlock(&cstate->current_fh);
673 set_change_info(&create->cr_cinfo, &cstate->current_fh);
674 fh_dup2(&cstate->current_fh, &resfh);
675 out:
676 fh_put(&resfh);
677 return status;
678 }
679
680 static __be32
681 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
682 struct nfsd4_getattr *getattr)
683 {
684 __be32 status;
685
686 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
687 if (status)
688 return status;
689
690 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
691 return nfserr_inval;
692
693 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
694 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
695 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
696
697 getattr->ga_fhp = &cstate->current_fh;
698 return nfs_ok;
699 }
700
701 static __be32
702 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
703 struct nfsd4_link *link)
704 {
705 __be32 status = nfserr_nofilehandle;
706
707 if (!cstate->save_fh.fh_dentry)
708 return status;
709 status = nfsd_link(rqstp, &cstate->current_fh,
710 link->li_name, link->li_namelen, &cstate->save_fh);
711 if (!status)
712 set_change_info(&link->li_cinfo, &cstate->current_fh);
713 return status;
714 }
715
716 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
717 {
718 struct svc_fh tmp_fh;
719 __be32 ret;
720
721 fh_init(&tmp_fh, NFS4_FHSIZE);
722 ret = exp_pseudoroot(rqstp, &tmp_fh);
723 if (ret)
724 return ret;
725 if (tmp_fh.fh_dentry == fh->fh_dentry) {
726 fh_put(&tmp_fh);
727 return nfserr_noent;
728 }
729 fh_put(&tmp_fh);
730 return nfsd_lookup(rqstp, fh, "..", 2, fh);
731 }
732
733 static __be32
734 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
735 void *arg)
736 {
737 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
738 }
739
740 static __be32
741 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 struct nfsd4_lookup *lookup)
743 {
744 return nfsd_lookup(rqstp, &cstate->current_fh,
745 lookup->lo_name, lookup->lo_len,
746 &cstate->current_fh);
747 }
748
749 static __be32
750 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
751 struct nfsd4_read *read)
752 {
753 __be32 status;
754
755 /* no need to check permission - this will be done in nfsd_read() */
756
757 read->rd_filp = NULL;
758 if (read->rd_offset >= OFFSET_MAX)
759 return nfserr_inval;
760
761 /*
762 * If we do a zero copy read, then a client will see read data
763 * that reflects the state of the file *after* performing the
764 * following compound.
765 *
766 * To ensure proper ordering, we therefore turn off zero copy if
767 * the client wants us to do more in this compound:
768 */
769 if (!nfsd4_last_compound_op(rqstp))
770 rqstp->rq_splice_ok = false;
771
772 nfs4_lock_state();
773 /* check stateid */
774 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
775 cstate, &read->rd_stateid,
776 RD_STATE, &read->rd_filp))) {
777 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
778 goto out;
779 }
780 if (read->rd_filp)
781 get_file(read->rd_filp);
782 status = nfs_ok;
783 out:
784 nfs4_unlock_state();
785 read->rd_rqstp = rqstp;
786 read->rd_fhp = &cstate->current_fh;
787 return status;
788 }
789
790 static __be32
791 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
792 struct nfsd4_readdir *readdir)
793 {
794 u64 cookie = readdir->rd_cookie;
795 static const nfs4_verifier zeroverf;
796
797 /* no need to check permission - this will be done in nfsd_readdir() */
798
799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
800 return nfserr_inval;
801
802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
805
806 if ((cookie == 1) || (cookie == 2) ||
807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
808 return nfserr_bad_cookie;
809
810 readdir->rd_rqstp = rqstp;
811 readdir->rd_fhp = &cstate->current_fh;
812 return nfs_ok;
813 }
814
815 static __be32
816 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
817 struct nfsd4_readlink *readlink)
818 {
819 readlink->rl_rqstp = rqstp;
820 readlink->rl_fhp = &cstate->current_fh;
821 return nfs_ok;
822 }
823
824 static __be32
825 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_remove *remove)
827 {
828 __be32 status;
829
830 if (locks_in_grace(SVC_NET(rqstp)))
831 return nfserr_grace;
832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
833 remove->rm_name, remove->rm_namelen);
834 if (!status) {
835 fh_unlock(&cstate->current_fh);
836 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
837 }
838 return status;
839 }
840
841 static __be32
842 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
843 struct nfsd4_rename *rename)
844 {
845 __be32 status = nfserr_nofilehandle;
846
847 if (!cstate->save_fh.fh_dentry)
848 return status;
849 if (locks_in_grace(SVC_NET(rqstp)) &&
850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
851 return nfserr_grace;
852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
853 rename->rn_snamelen, &cstate->current_fh,
854 rename->rn_tname, rename->rn_tnamelen);
855 if (status)
856 return status;
857 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
858 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
859 return nfs_ok;
860 }
861
862 static __be32
863 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 struct nfsd4_secinfo *secinfo)
865 {
866 struct svc_fh resfh;
867 struct svc_export *exp;
868 struct dentry *dentry;
869 __be32 err;
870
871 fh_init(&resfh, NFS4_FHSIZE);
872 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
873 if (err)
874 return err;
875 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
876 secinfo->si_name, secinfo->si_namelen,
877 &exp, &dentry);
878 if (err)
879 return err;
880 if (dentry->d_inode == NULL) {
881 exp_put(exp);
882 err = nfserr_noent;
883 } else
884 secinfo->si_exp = exp;
885 dput(dentry);
886 if (cstate->minorversion)
887 /* See rfc 5661 section 2.6.3.1.1.8 */
888 fh_put(&cstate->current_fh);
889 return err;
890 }
891
892 static __be32
893 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
894 struct nfsd4_secinfo_no_name *sin)
895 {
896 __be32 err;
897
898 switch (sin->sin_style) {
899 case NFS4_SECINFO_STYLE4_CURRENT_FH:
900 break;
901 case NFS4_SECINFO_STYLE4_PARENT:
902 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
903 if (err)
904 return err;
905 break;
906 default:
907 return nfserr_inval;
908 }
909 exp_get(cstate->current_fh.fh_export);
910 sin->sin_exp = cstate->current_fh.fh_export;
911 fh_put(&cstate->current_fh);
912 return nfs_ok;
913 }
914
915 static __be32
916 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
917 struct nfsd4_setattr *setattr)
918 {
919 __be32 status = nfs_ok;
920 int err;
921
922 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
923 nfs4_lock_state();
924 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
925 &setattr->sa_stateid, WR_STATE, NULL);
926 nfs4_unlock_state();
927 if (status) {
928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
929 return status;
930 }
931 }
932 err = fh_want_write(&cstate->current_fh);
933 if (err)
934 return nfserrno(err);
935 status = nfs_ok;
936
937 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
938 nfsd_attrmask);
939 if (status)
940 goto out;
941
942 if (setattr->sa_acl != NULL)
943 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
944 setattr->sa_acl);
945 if (status)
946 goto out;
947 if (setattr->sa_label.len)
948 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
949 &setattr->sa_label);
950 if (status)
951 goto out;
952 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
953 0, (time_t)0);
954 out:
955 fh_drop_write(&cstate->current_fh);
956 return status;
957 }
958
959 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
960 {
961 int i = 1;
962 int buflen = write->wr_buflen;
963
964 vec[0].iov_base = write->wr_head.iov_base;
965 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
966 buflen -= vec[0].iov_len;
967
968 while (buflen) {
969 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
970 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
971 buflen -= vec[i].iov_len;
972 i++;
973 }
974 return i;
975 }
976
977 static __be32
978 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
979 struct nfsd4_write *write)
980 {
981 stateid_t *stateid = &write->wr_stateid;
982 struct file *filp = NULL;
983 __be32 status = nfs_ok;
984 unsigned long cnt;
985 int nvecs;
986
987 /* no need to check permission - this will be done in nfsd_write() */
988
989 if (write->wr_offset >= OFFSET_MAX)
990 return nfserr_inval;
991
992 nfs4_lock_state();
993 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
994 cstate, stateid, WR_STATE, &filp);
995 if (status) {
996 nfs4_unlock_state();
997 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
998 return status;
999 }
1000 if (filp)
1001 get_file(filp);
1002 nfs4_unlock_state();
1003
1004 cnt = write->wr_buflen;
1005 write->wr_how_written = write->wr_stable_how;
1006 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1007
1008 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1009 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1010
1011 status = nfsd_write(rqstp, &cstate->current_fh, filp,
1012 write->wr_offset, rqstp->rq_vec, nvecs,
1013 &cnt, &write->wr_how_written);
1014 if (filp)
1015 fput(filp);
1016
1017 write->wr_bytes_written = cnt;
1018
1019 return status;
1020 }
1021
1022 /* This routine never returns NFS_OK! If there are no other errors, it
1023 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1024 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1025 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1026 */
1027 static __be32
1028 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1029 struct nfsd4_verify *verify)
1030 {
1031 __be32 *buf, *p;
1032 int count;
1033 __be32 status;
1034
1035 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1036 if (status)
1037 return status;
1038
1039 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1040 if (status)
1041 return status;
1042
1043 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1044 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1045 return nfserr_inval;
1046 if (verify->ve_attrlen & 3)
1047 return nfserr_inval;
1048
1049 /* count in words:
1050 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1051 */
1052 count = 4 + (verify->ve_attrlen >> 2);
1053 buf = kmalloc(count << 2, GFP_KERNEL);
1054 if (!buf)
1055 return nfserr_jukebox;
1056
1057 p = buf;
1058 status = nfsd4_encode_fattr(&cstate->current_fh,
1059 cstate->current_fh.fh_export,
1060 cstate->current_fh.fh_dentry, &p,
1061 count, verify->ve_bmval,
1062 rqstp, 0);
1063
1064 /* this means that nfsd4_encode_fattr() ran out of space */
1065 if (status == nfserr_resource)
1066 status = nfserr_not_same;
1067 if (status)
1068 goto out_kfree;
1069
1070 /* skip bitmap */
1071 p = buf + 1 + ntohl(buf[0]);
1072 status = nfserr_not_same;
1073 if (ntohl(*p++) != verify->ve_attrlen)
1074 goto out_kfree;
1075 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1076 status = nfserr_same;
1077
1078 out_kfree:
1079 kfree(buf);
1080 return status;
1081 }
1082
1083 static __be32
1084 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1085 struct nfsd4_verify *verify)
1086 {
1087 __be32 status;
1088
1089 status = _nfsd4_verify(rqstp, cstate, verify);
1090 return status == nfserr_not_same ? nfs_ok : status;
1091 }
1092
1093 static __be32
1094 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1095 struct nfsd4_verify *verify)
1096 {
1097 __be32 status;
1098
1099 status = _nfsd4_verify(rqstp, cstate, verify);
1100 return status == nfserr_same ? nfs_ok : status;
1101 }
1102
1103 /*
1104 * NULL call.
1105 */
1106 static __be32
1107 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1108 {
1109 return nfs_ok;
1110 }
1111
1112 static inline void nfsd4_increment_op_stats(u32 opnum)
1113 {
1114 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1115 nfsdstats.nfs4_opcount[opnum]++;
1116 }
1117
1118 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1119 void *);
1120 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1121 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1122 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1123
1124 enum nfsd4_op_flags {
1125 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1126 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1127 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1128 /* For rfc 5661 section 2.6.3.1.1: */
1129 OP_HANDLES_WRONGSEC = 1 << 3,
1130 OP_IS_PUTFH_LIKE = 1 << 4,
1131 /*
1132 * These are the ops whose result size we estimate before
1133 * encoding, to avoid performing an op then not being able to
1134 * respond or cache a response. This includes writes and setattrs
1135 * as well as the operations usually called "nonidempotent":
1136 */
1137 OP_MODIFIES_SOMETHING = 1 << 5,
1138 /*
1139 * Cache compounds containing these ops in the xid-based drc:
1140 * We use the DRC for compounds containing non-idempotent
1141 * operations, *except* those that are 4.1-specific (since
1142 * sessions provide their own EOS), and except for stateful
1143 * operations other than setclientid and setclientid_confirm
1144 * (since sequence numbers provide EOS for open, lock, etc in
1145 * the v4.0 case).
1146 */
1147 OP_CACHEME = 1 << 6,
1148 /*
1149 * These are ops which clear current state id.
1150 */
1151 OP_CLEAR_STATEID = 1 << 7,
1152 };
1153
1154 struct nfsd4_operation {
1155 nfsd4op_func op_func;
1156 u32 op_flags;
1157 char *op_name;
1158 /* Try to get response size before operation */
1159 nfsd4op_rsize op_rsize_bop;
1160 stateid_getter op_get_currentstateid;
1161 stateid_setter op_set_currentstateid;
1162 };
1163
1164 static struct nfsd4_operation nfsd4_ops[];
1165
1166 #ifdef NFSD_DEBUG
1167 static const char *nfsd4_op_name(unsigned opnum);
1168 #endif
1169
1170 /*
1171 * Enforce NFSv4.1 COMPOUND ordering rules:
1172 *
1173 * Also note, enforced elsewhere:
1174 * - SEQUENCE other than as first op results in
1175 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1176 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1177 * (Enforced in nfsd4_bind_conn_to_session().)
1178 * - DESTROY_SESSION must be the final operation in a compound, if
1179 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1180 * (Enforced in nfsd4_destroy_session().)
1181 */
1182 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1183 {
1184 struct nfsd4_op *op = &args->ops[0];
1185
1186 /* These ordering requirements don't apply to NFSv4.0: */
1187 if (args->minorversion == 0)
1188 return nfs_ok;
1189 /* This is weird, but OK, not our problem: */
1190 if (args->opcnt == 0)
1191 return nfs_ok;
1192 if (op->status == nfserr_op_illegal)
1193 return nfs_ok;
1194 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1195 return nfserr_op_not_in_session;
1196 if (op->opnum == OP_SEQUENCE)
1197 return nfs_ok;
1198 if (args->opcnt != 1)
1199 return nfserr_not_only_op;
1200 return nfs_ok;
1201 }
1202
1203 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1204 {
1205 return &nfsd4_ops[op->opnum];
1206 }
1207
1208 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1209 {
1210 return OPDESC(op)->op_flags & OP_CACHEME;
1211 }
1212
1213 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1214 {
1215 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1216 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1217 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1218 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1219 struct nfsd4_operation *thisd;
1220 struct nfsd4_operation *nextd;
1221
1222 thisd = OPDESC(this);
1223 /*
1224 * Most ops check wronsec on our own; only the putfh-like ops
1225 * have special rules.
1226 */
1227 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1228 return false;
1229 /*
1230 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1231 * put-filehandle operation if we're not going to use the
1232 * result:
1233 */
1234 if (argp->opcnt == resp->opcnt)
1235 return false;
1236
1237 nextd = OPDESC(next);
1238 /*
1239 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1240 * errors themselves as necessary; others should check for them
1241 * now:
1242 */
1243 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1244 }
1245
1246 /*
1247 * COMPOUND call.
1248 */
1249 static __be32
1250 nfsd4_proc_compound(struct svc_rqst *rqstp,
1251 struct nfsd4_compoundargs *args,
1252 struct nfsd4_compoundres *resp)
1253 {
1254 struct nfsd4_op *op;
1255 struct nfsd4_operation *opdesc;
1256 struct nfsd4_compound_state *cstate = &resp->cstate;
1257 int slack_bytes;
1258 u32 plen = 0;
1259 __be32 status;
1260
1261 resp->xbuf = &rqstp->rq_res;
1262 resp->p = rqstp->rq_res.head[0].iov_base +
1263 rqstp->rq_res.head[0].iov_len;
1264 resp->tagp = resp->p;
1265 /* reserve space for: taglen, tag, and opcnt */
1266 resp->p += 2 + XDR_QUADLEN(args->taglen);
1267 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1268 resp->taglen = args->taglen;
1269 resp->tag = args->tag;
1270 resp->opcnt = 0;
1271 resp->rqstp = rqstp;
1272 resp->cstate.minorversion = args->minorversion;
1273 resp->cstate.replay_owner = NULL;
1274 resp->cstate.session = NULL;
1275 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1276 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1277 /*
1278 * Don't use the deferral mechanism for NFSv4; compounds make it
1279 * too hard to avoid non-idempotency problems.
1280 */
1281 rqstp->rq_usedeferral = 0;
1282
1283 /*
1284 * According to RFC3010, this takes precedence over all other errors.
1285 */
1286 status = nfserr_minor_vers_mismatch;
1287 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1288 goto out;
1289
1290 status = nfs41_check_op_ordering(args);
1291 if (status) {
1292 op = &args->ops[0];
1293 op->status = status;
1294 goto encode_op;
1295 }
1296
1297 while (!status && resp->opcnt < args->opcnt) {
1298 op = &args->ops[resp->opcnt++];
1299
1300 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1301 resp->opcnt, args->opcnt, op->opnum,
1302 nfsd4_op_name(op->opnum));
1303 /*
1304 * The XDR decode routines may have pre-set op->status;
1305 * for example, if there is a miscellaneous XDR error
1306 * it will be set to nfserr_bad_xdr.
1307 */
1308 if (op->status) {
1309 if (op->opnum == OP_OPEN)
1310 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1311 goto encode_op;
1312 }
1313
1314 /* We must be able to encode a successful response to
1315 * this operation, with enough room left over to encode a
1316 * failed response to the next operation. If we don't
1317 * have enough room, fail with ERR_RESOURCE.
1318 */
1319 slack_bytes = (char *)resp->end - (char *)resp->p;
1320 if (slack_bytes < COMPOUND_SLACK_SPACE
1321 + COMPOUND_ERR_SLACK_SPACE) {
1322 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1323 op->status = nfserr_resource;
1324 goto encode_op;
1325 }
1326
1327 opdesc = OPDESC(op);
1328
1329 if (!cstate->current_fh.fh_dentry) {
1330 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1331 op->status = nfserr_nofilehandle;
1332 goto encode_op;
1333 }
1334 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1335 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1336 op->status = nfserr_moved;
1337 goto encode_op;
1338 }
1339
1340 /* If op is non-idempotent */
1341 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1342 plen = opdesc->op_rsize_bop(rqstp, op);
1343 /*
1344 * If there's still another operation, make sure
1345 * we'll have space to at least encode an error:
1346 */
1347 if (resp->opcnt < args->opcnt)
1348 plen += COMPOUND_ERR_SLACK_SPACE;
1349 op->status = nfsd4_check_resp_size(resp, plen);
1350 }
1351
1352 if (op->status)
1353 goto encode_op;
1354
1355 if (opdesc->op_get_currentstateid)
1356 opdesc->op_get_currentstateid(cstate, &op->u);
1357 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1358
1359 if (!op->status) {
1360 if (opdesc->op_set_currentstateid)
1361 opdesc->op_set_currentstateid(cstate, &op->u);
1362
1363 if (opdesc->op_flags & OP_CLEAR_STATEID)
1364 clear_current_stateid(cstate);
1365
1366 if (need_wrongsec_check(rqstp))
1367 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1368 }
1369
1370 encode_op:
1371 /* Only from SEQUENCE */
1372 if (resp->cstate.status == nfserr_replay_cache) {
1373 dprintk("%s NFS4.1 replay from cache\n", __func__);
1374 status = op->status;
1375 goto out;
1376 }
1377 if (op->status == nfserr_replay_me) {
1378 op->replay = &cstate->replay_owner->so_replay;
1379 nfsd4_encode_replay(resp, op);
1380 status = op->status = op->replay->rp_status;
1381 } else {
1382 nfsd4_encode_operation(resp, op);
1383 status = op->status;
1384 }
1385
1386 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1387 args->ops, args->opcnt, resp->opcnt, op->opnum,
1388 be32_to_cpu(status));
1389
1390 if (cstate->replay_owner) {
1391 nfs4_unlock_state();
1392 cstate->replay_owner = NULL;
1393 }
1394 /* XXX Ugh, we need to get rid of this kind of special case: */
1395 if (op->opnum == OP_READ && op->u.read.rd_filp)
1396 fput(op->u.read.rd_filp);
1397
1398 nfsd4_increment_op_stats(op->opnum);
1399 }
1400
1401 resp->cstate.status = status;
1402 fh_put(&resp->cstate.current_fh);
1403 fh_put(&resp->cstate.save_fh);
1404 BUG_ON(resp->cstate.replay_owner);
1405 out:
1406 /* Reset deferral mechanism for RPC deferrals */
1407 rqstp->rq_usedeferral = 1;
1408 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1409 return status;
1410 }
1411
1412 #define op_encode_hdr_size (2)
1413 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1414 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1415 #define op_encode_change_info_maxsz (5)
1416 #define nfs4_fattr_bitmap_maxsz (4)
1417
1418 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1419 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1420
1421 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1422
1423 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1424 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1425 op_encode_ace_maxsz)
1426
1427 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1428
1429 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1430 {
1431 return (op_encode_hdr_size) * sizeof(__be32);
1432 }
1433
1434 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1435 {
1436 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1437 }
1438
1439 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1440 {
1441 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1442 }
1443
1444 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1445 {
1446 return (op_encode_hdr_size + op_encode_change_info_maxsz
1447 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1448 }
1449
1450 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1451 {
1452 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1453 * sizeof(__be32);
1454 }
1455
1456 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1457 {
1458 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1459 * sizeof(__be32);
1460 }
1461
1462 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1463 {
1464 return (op_encode_hdr_size + op_encode_stateid_maxsz
1465 + op_encode_change_info_maxsz + 1
1466 + nfs4_fattr_bitmap_maxsz
1467 + op_encode_delegation_maxsz) * sizeof(__be32);
1468 }
1469
1470 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1471 {
1472 u32 maxcount = 0, rlen = 0;
1473
1474 maxcount = svc_max_payload(rqstp);
1475 rlen = op->u.read.rd_length;
1476
1477 if (rlen > maxcount)
1478 rlen = maxcount;
1479
1480 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1481 }
1482
1483 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1484 {
1485 u32 rlen = op->u.readdir.rd_maxcount;
1486
1487 if (rlen > PAGE_SIZE)
1488 rlen = PAGE_SIZE;
1489
1490 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1491 * sizeof(__be32) + rlen;
1492 }
1493
1494 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1495 {
1496 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1497 * sizeof(__be32);
1498 }
1499
1500 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1501 {
1502 return (op_encode_hdr_size + op_encode_change_info_maxsz
1503 + op_encode_change_info_maxsz) * sizeof(__be32);
1504 }
1505
1506 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1507 {
1508 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1509 }
1510
1511 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1512 {
1513 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1514 sizeof(__be32);
1515 }
1516
1517 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1518 {
1519 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1520 }
1521
1522 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1523 {
1524 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1525 1 + 1 + 2 + /* eir_flags, spr_how, spo_must_enforce & _allow */\
1526 2 + /*eir_server_owner.so_minor_id */\
1527 /* eir_server_owner.so_major_id<> */\
1528 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1529 /* eir_server_scope<> */\
1530 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1531 1 + /* eir_server_impl_id array length */\
1532 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1533 }
1534
1535 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1536 {
1537 return (op_encode_hdr_size + \
1538 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1539 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1540 }
1541
1542 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1543 {
1544 return (op_encode_hdr_size + \
1545 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1546 2 + /* csr_sequence, csr_flags */\
1547 op_encode_channel_attrs_maxsz + \
1548 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1549 }
1550
1551 static struct nfsd4_operation nfsd4_ops[] = {
1552 [OP_ACCESS] = {
1553 .op_func = (nfsd4op_func)nfsd4_access,
1554 .op_name = "OP_ACCESS",
1555 },
1556 [OP_CLOSE] = {
1557 .op_func = (nfsd4op_func)nfsd4_close,
1558 .op_flags = OP_MODIFIES_SOMETHING,
1559 .op_name = "OP_CLOSE",
1560 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1561 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1562 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1563 },
1564 [OP_COMMIT] = {
1565 .op_func = (nfsd4op_func)nfsd4_commit,
1566 .op_flags = OP_MODIFIES_SOMETHING,
1567 .op_name = "OP_COMMIT",
1568 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1569 },
1570 [OP_CREATE] = {
1571 .op_func = (nfsd4op_func)nfsd4_create,
1572 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1573 .op_name = "OP_CREATE",
1574 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1575 },
1576 [OP_DELEGRETURN] = {
1577 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1578 .op_flags = OP_MODIFIES_SOMETHING,
1579 .op_name = "OP_DELEGRETURN",
1580 .op_rsize_bop = nfsd4_only_status_rsize,
1581 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1582 },
1583 [OP_GETATTR] = {
1584 .op_func = (nfsd4op_func)nfsd4_getattr,
1585 .op_flags = ALLOWED_ON_ABSENT_FS,
1586 .op_name = "OP_GETATTR",
1587 },
1588 [OP_GETFH] = {
1589 .op_func = (nfsd4op_func)nfsd4_getfh,
1590 .op_name = "OP_GETFH",
1591 },
1592 [OP_LINK] = {
1593 .op_func = (nfsd4op_func)nfsd4_link,
1594 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1595 | OP_CACHEME,
1596 .op_name = "OP_LINK",
1597 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1598 },
1599 [OP_LOCK] = {
1600 .op_func = (nfsd4op_func)nfsd4_lock,
1601 .op_flags = OP_MODIFIES_SOMETHING,
1602 .op_name = "OP_LOCK",
1603 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1604 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1605 },
1606 [OP_LOCKT] = {
1607 .op_func = (nfsd4op_func)nfsd4_lockt,
1608 .op_name = "OP_LOCKT",
1609 },
1610 [OP_LOCKU] = {
1611 .op_func = (nfsd4op_func)nfsd4_locku,
1612 .op_flags = OP_MODIFIES_SOMETHING,
1613 .op_name = "OP_LOCKU",
1614 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1615 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1616 },
1617 [OP_LOOKUP] = {
1618 .op_func = (nfsd4op_func)nfsd4_lookup,
1619 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1620 .op_name = "OP_LOOKUP",
1621 },
1622 [OP_LOOKUPP] = {
1623 .op_func = (nfsd4op_func)nfsd4_lookupp,
1624 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1625 .op_name = "OP_LOOKUPP",
1626 },
1627 [OP_NVERIFY] = {
1628 .op_func = (nfsd4op_func)nfsd4_nverify,
1629 .op_name = "OP_NVERIFY",
1630 },
1631 [OP_OPEN] = {
1632 .op_func = (nfsd4op_func)nfsd4_open,
1633 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1634 .op_name = "OP_OPEN",
1635 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1636 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1637 },
1638 [OP_OPEN_CONFIRM] = {
1639 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1640 .op_flags = OP_MODIFIES_SOMETHING,
1641 .op_name = "OP_OPEN_CONFIRM",
1642 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1643 },
1644 [OP_OPEN_DOWNGRADE] = {
1645 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1646 .op_flags = OP_MODIFIES_SOMETHING,
1647 .op_name = "OP_OPEN_DOWNGRADE",
1648 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1649 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1650 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1651 },
1652 [OP_PUTFH] = {
1653 .op_func = (nfsd4op_func)nfsd4_putfh,
1654 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1655 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1656 | OP_CLEAR_STATEID,
1657 .op_name = "OP_PUTFH",
1658 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1659 },
1660 [OP_PUTPUBFH] = {
1661 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1662 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1663 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1664 | OP_CLEAR_STATEID,
1665 .op_name = "OP_PUTPUBFH",
1666 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1667 },
1668 [OP_PUTROOTFH] = {
1669 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1670 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1671 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1672 | OP_CLEAR_STATEID,
1673 .op_name = "OP_PUTROOTFH",
1674 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1675 },
1676 [OP_READ] = {
1677 .op_func = (nfsd4op_func)nfsd4_read,
1678 .op_flags = OP_MODIFIES_SOMETHING,
1679 .op_name = "OP_READ",
1680 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1681 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1682 },
1683 [OP_READDIR] = {
1684 .op_func = (nfsd4op_func)nfsd4_readdir,
1685 .op_flags = OP_MODIFIES_SOMETHING,
1686 .op_name = "OP_READDIR",
1687 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1688 },
1689 [OP_READLINK] = {
1690 .op_func = (nfsd4op_func)nfsd4_readlink,
1691 .op_name = "OP_READLINK",
1692 },
1693 [OP_REMOVE] = {
1694 .op_func = (nfsd4op_func)nfsd4_remove,
1695 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1696 .op_name = "OP_REMOVE",
1697 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1698 },
1699 [OP_RENAME] = {
1700 .op_func = (nfsd4op_func)nfsd4_rename,
1701 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1702 .op_name = "OP_RENAME",
1703 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1704 },
1705 [OP_RENEW] = {
1706 .op_func = (nfsd4op_func)nfsd4_renew,
1707 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1708 | OP_MODIFIES_SOMETHING,
1709 .op_name = "OP_RENEW",
1710 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1711
1712 },
1713 [OP_RESTOREFH] = {
1714 .op_func = (nfsd4op_func)nfsd4_restorefh,
1715 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1716 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1717 .op_name = "OP_RESTOREFH",
1718 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1719 },
1720 [OP_SAVEFH] = {
1721 .op_func = (nfsd4op_func)nfsd4_savefh,
1722 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1723 .op_name = "OP_SAVEFH",
1724 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1725 },
1726 [OP_SECINFO] = {
1727 .op_func = (nfsd4op_func)nfsd4_secinfo,
1728 .op_flags = OP_HANDLES_WRONGSEC,
1729 .op_name = "OP_SECINFO",
1730 },
1731 [OP_SETATTR] = {
1732 .op_func = (nfsd4op_func)nfsd4_setattr,
1733 .op_name = "OP_SETATTR",
1734 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1735 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1736 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1737 },
1738 [OP_SETCLIENTID] = {
1739 .op_func = (nfsd4op_func)nfsd4_setclientid,
1740 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1741 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1742 .op_name = "OP_SETCLIENTID",
1743 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1744 },
1745 [OP_SETCLIENTID_CONFIRM] = {
1746 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1747 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1748 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1749 .op_name = "OP_SETCLIENTID_CONFIRM",
1750 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1751 },
1752 [OP_VERIFY] = {
1753 .op_func = (nfsd4op_func)nfsd4_verify,
1754 .op_name = "OP_VERIFY",
1755 },
1756 [OP_WRITE] = {
1757 .op_func = (nfsd4op_func)nfsd4_write,
1758 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1759 .op_name = "OP_WRITE",
1760 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1761 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1762 },
1763 [OP_RELEASE_LOCKOWNER] = {
1764 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1765 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1766 | OP_MODIFIES_SOMETHING,
1767 .op_name = "OP_RELEASE_LOCKOWNER",
1768 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1769 },
1770
1771 /* NFSv4.1 operations */
1772 [OP_EXCHANGE_ID] = {
1773 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1774 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1775 | OP_MODIFIES_SOMETHING,
1776 .op_name = "OP_EXCHANGE_ID",
1777 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1778 },
1779 [OP_BACKCHANNEL_CTL] = {
1780 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1781 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1782 .op_name = "OP_BACKCHANNEL_CTL",
1783 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1784 },
1785 [OP_BIND_CONN_TO_SESSION] = {
1786 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1787 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1788 | OP_MODIFIES_SOMETHING,
1789 .op_name = "OP_BIND_CONN_TO_SESSION",
1790 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1791 },
1792 [OP_CREATE_SESSION] = {
1793 .op_func = (nfsd4op_func)nfsd4_create_session,
1794 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1795 | OP_MODIFIES_SOMETHING,
1796 .op_name = "OP_CREATE_SESSION",
1797 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1798 },
1799 [OP_DESTROY_SESSION] = {
1800 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1801 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1802 | OP_MODIFIES_SOMETHING,
1803 .op_name = "OP_DESTROY_SESSION",
1804 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1805 },
1806 [OP_SEQUENCE] = {
1807 .op_func = (nfsd4op_func)nfsd4_sequence,
1808 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1809 .op_name = "OP_SEQUENCE",
1810 },
1811 [OP_DESTROY_CLIENTID] = {
1812 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1813 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1814 | OP_MODIFIES_SOMETHING,
1815 .op_name = "OP_DESTROY_CLIENTID",
1816 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1817 },
1818 [OP_RECLAIM_COMPLETE] = {
1819 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1820 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1821 .op_name = "OP_RECLAIM_COMPLETE",
1822 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1823 },
1824 [OP_SECINFO_NO_NAME] = {
1825 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1826 .op_flags = OP_HANDLES_WRONGSEC,
1827 .op_name = "OP_SECINFO_NO_NAME",
1828 },
1829 [OP_TEST_STATEID] = {
1830 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1831 .op_flags = ALLOWED_WITHOUT_FH,
1832 .op_name = "OP_TEST_STATEID",
1833 },
1834 [OP_FREE_STATEID] = {
1835 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1836 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1837 .op_name = "OP_FREE_STATEID",
1838 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1839 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1840 },
1841 };
1842
1843 #ifdef NFSD_DEBUG
1844 static const char *nfsd4_op_name(unsigned opnum)
1845 {
1846 if (opnum < ARRAY_SIZE(nfsd4_ops))
1847 return nfsd4_ops[opnum].op_name;
1848 return "unknown_operation";
1849 }
1850 #endif
1851
1852 #define nfsd4_voidres nfsd4_voidargs
1853 struct nfsd4_voidargs { int dummy; };
1854
1855 static struct svc_procedure nfsd_procedures4[2] = {
1856 [NFSPROC4_NULL] = {
1857 .pc_func = (svc_procfunc) nfsd4_proc_null,
1858 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1859 .pc_argsize = sizeof(struct nfsd4_voidargs),
1860 .pc_ressize = sizeof(struct nfsd4_voidres),
1861 .pc_cachetype = RC_NOCACHE,
1862 .pc_xdrressize = 1,
1863 },
1864 [NFSPROC4_COMPOUND] = {
1865 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1866 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1867 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1868 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1869 .pc_ressize = sizeof(struct nfsd4_compoundres),
1870 .pc_release = nfsd4_release_compoundargs,
1871 .pc_cachetype = RC_NOCACHE,
1872 .pc_xdrressize = NFSD_BUFSIZE/4,
1873 },
1874 };
1875
1876 struct svc_version nfsd_version4 = {
1877 .vs_vers = 4,
1878 .vs_nproc = 2,
1879 .vs_proc = nfsd_procedures4,
1880 .vs_dispatch = nfsd_dispatch,
1881 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1882 };
1883
1884 /*
1885 * Local variables:
1886 * c-basic-offset: 8
1887 * End:
1888 */
Linux with added FPC-III support