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ARM: 7747/1: pcpu: ensure __my_cpu_offset cannot be re-ordered across barrier()
[linux/fpc-iii.git] / fs / nfsd / nfs4proc.c
blob27d74a2945151cfbdf76e41cd381b90a0efe4d09
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 #define NFSDDBG_FACILITY NFSDDBG_PROC
46
47 static u32 nfsd_attrmask[] = {
48 NFSD_WRITEABLE_ATTRS_WORD0,
49 NFSD_WRITEABLE_ATTRS_WORD1,
50 NFSD_WRITEABLE_ATTRS_WORD2
51 };
52
53 static u32 nfsd41_ex_attrmask[] = {
54 NFSD_SUPPATTR_EXCLCREAT_WORD0,
55 NFSD_SUPPATTR_EXCLCREAT_WORD1,
56 NFSD_SUPPATTR_EXCLCREAT_WORD2
57 };
58
59 static __be32
60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
61 u32 *bmval, u32 *writable)
62 {
63 struct dentry *dentry = cstate->current_fh.fh_dentry;
64
65 /*
66 * Check about attributes are supported by the NFSv4 server or not.
67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
68 */
69 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
70 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
71 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
72 return nfserr_attrnotsupp;
73
74 /*
75 * Check FATTR4_WORD0_ACL can be supported
76 * in current environment or not.
77 */
78 if (bmval[0] & FATTR4_WORD0_ACL) {
79 if (!IS_POSIXACL(dentry->d_inode))
80 return nfserr_attrnotsupp;
81 }
82
83 /*
84 * According to spec, read-only attributes return ERR_INVAL.
85 */
86 if (writable) {
87 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
88 (bmval[2] & ~writable[2]))
89 return nfserr_inval;
90 }
91
92 return nfs_ok;
93 }
94
95 static __be32
96 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
97 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
98 {
99 __be32 status = nfs_ok;
100
101 if (open->op_create == NFS4_OPEN_CREATE) {
102 if (open->op_createmode == NFS4_CREATE_UNCHECKED
103 || open->op_createmode == NFS4_CREATE_GUARDED)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd_attrmask);
106 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
107 status = check_attr_support(rqstp, cstate,
108 open->op_bmval, nfsd41_ex_attrmask);
109 }
110
111 return status;
112 }
113
114 static int
115 is_create_with_attrs(struct nfsd4_open *open)
116 {
117 return open->op_create == NFS4_OPEN_CREATE
118 && (open->op_createmode == NFS4_CREATE_UNCHECKED
119 || open->op_createmode == NFS4_CREATE_GUARDED
120 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
121 }
122
123 /*
124 * if error occurs when setting the acl, just clear the acl bit
125 * in the returned attr bitmap.
126 */
127 static void
128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
129 struct nfs4_acl *acl, u32 *bmval)
130 {
131 __be32 status;
132
133 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
134 if (status)
135 /*
136 * We should probably fail the whole open at this point,
137 * but we've already created the file, so it's too late;
138 * So this seems the least of evils:
139 */
140 bmval[0] &= ~FATTR4_WORD0_ACL;
141 }
142
143 static inline void
144 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
145 {
146 fh_put(dst);
147 dget(src->fh_dentry);
148 if (src->fh_export)
149 cache_get(&src->fh_export->h);
150 *dst = *src;
151 }
152
153 static __be32
154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
155 {
156 __be32 status;
157
158 if (open->op_truncate &&
159 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
160 return nfserr_inval;
161
162 accmode |= NFSD_MAY_READ_IF_EXEC;
163
164 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
165 accmode |= NFSD_MAY_READ;
166 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
167 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
168 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
169 accmode |= NFSD_MAY_WRITE;
170
171 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
172
173 return status;
174 }
175
176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
177 {
178 umode_t mode = fh->fh_dentry->d_inode->i_mode;
179
180 if (S_ISREG(mode))
181 return nfs_ok;
182 if (S_ISDIR(mode))
183 return nfserr_isdir;
184 /*
185 * Using err_symlink as our catch-all case may look odd; but
186 * there's no other obvious error for this case in 4.0, and we
187 * happen to know that it will cause the linux v4 client to do
188 * the right thing on attempts to open something other than a
189 * regular file.
190 */
191 return nfserr_symlink;
192 }
193
194 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
195 {
196 if (nfsd4_has_session(cstate))
197 return;
198 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
199 &resfh->fh_handle);
200 }
201
202 static __be32
203 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
204 {
205 struct svc_fh *current_fh = &cstate->current_fh;
206 struct svc_fh *resfh;
207 int accmode;
208 __be32 status;
209
210 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
211 if (!resfh)
212 return nfserr_jukebox;
213 fh_init(resfh, NFS4_FHSIZE);
214 open->op_truncate = 0;
215
216 if (open->op_create) {
217 /* FIXME: check session persistence and pnfs flags.
218 * The nfsv4.1 spec requires the following semantics:
219 *
220 * Persistent | pNFS | Server REQUIRED | Client Allowed
221 * Reply Cache | server | |
222 * -------------+--------+-----------------+--------------------
223 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
224 * | | | (SHOULD)
225 * | | and EXCLUSIVE4 | or EXCLUSIVE4
226 * | | | (SHOULD NOT)
227 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
228 * yes | no | GUARDED4 | GUARDED4
229 * yes | yes | GUARDED4 | GUARDED4
230 */
231
232 /*
233 * Note: create modes (UNCHECKED,GUARDED...) are the same
234 * in NFSv4 as in v3 except EXCLUSIVE4_1.
235 */
236 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
237 open->op_fname.len, &open->op_iattr,
238 resfh, open->op_createmode,
239 (u32 *)open->op_verf.data,
240 &open->op_truncate, &open->op_created);
241
242 /*
243 * Following rfc 3530 14.2.16, use the returned bitmask
244 * to indicate which attributes we used to store the
245 * verifier:
246 */
247 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
248 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
249 FATTR4_WORD1_TIME_MODIFY);
250 } else {
251 status = nfsd_lookup(rqstp, current_fh,
252 open->op_fname.data, open->op_fname.len, resfh);
253 fh_unlock(current_fh);
254 }
255 if (status)
256 goto out;
257 status = nfsd_check_obj_isreg(resfh);
258 if (status)
259 goto out;
260
261 if (is_create_with_attrs(open) && open->op_acl != NULL)
262 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
263
264 nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
265 accmode = NFSD_MAY_NOP;
266 if (open->op_created)
267 accmode |= NFSD_MAY_OWNER_OVERRIDE;
268 status = do_open_permission(rqstp, resfh, open, accmode);
269 set_change_info(&open->op_cinfo, current_fh);
270 fh_dup2(current_fh, resfh);
271 out:
272 fh_put(resfh);
273 kfree(resfh);
274 return status;
275 }
276
277 static __be32
278 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
279 {
280 struct svc_fh *current_fh = &cstate->current_fh;
281 __be32 status;
282 int accmode = 0;
283
284 /* We don't know the target directory, and therefore can not
285 * set the change info
286 */
287
288 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
289
290 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
291
292 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
293 (open->op_iattr.ia_size == 0);
294 /*
295 * In the delegation case, the client is telling us about an
296 * open that it *already* performed locally, some time ago. We
297 * should let it succeed now if possible.
298 *
299 * In the case of a CLAIM_FH open, on the other hand, the client
300 * may be counting on us to enforce permissions (the Linux 4.1
301 * client uses this for normal opens, for example).
302 */
303 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
304 accmode = NFSD_MAY_OWNER_OVERRIDE;
305
306 status = do_open_permission(rqstp, current_fh, open, accmode);
307
308 return status;
309 }
310
311 static void
312 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
313 {
314 struct nfsd4_sessionid *sid =
315 (struct nfsd4_sessionid *)session->se_sessionid.data;
316
317 clid->cl_boot = sid->clientid.cl_boot;
318 clid->cl_id = sid->clientid.cl_id;
319 }
320
321 static __be32
322 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
323 struct nfsd4_open *open)
324 {
325 __be32 status;
326 struct nfsd4_compoundres *resp;
327 struct net *net = SVC_NET(rqstp);
328 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
329
330 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
331 (int)open->op_fname.len, open->op_fname.data,
332 open->op_openowner);
333
334 /* This check required by spec. */
335 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
336 return nfserr_inval;
337
338 open->op_created = 0;
339 /*
340 * RFC5661 18.51.3
341 * Before RECLAIM_COMPLETE done, server should deny new lock
342 */
343 if (nfsd4_has_session(cstate) &&
344 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
345 &cstate->session->se_client->cl_flags) &&
346 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
347 return nfserr_grace;
348
349 if (nfsd4_has_session(cstate))
350 copy_clientid(&open->op_clientid, cstate->session);
351
352 nfs4_lock_state();
353
354 /* check seqid for replay. set nfs4_owner */
355 resp = rqstp->rq_resp;
356 status = nfsd4_process_open1(&resp->cstate, open, nn);
357 if (status == nfserr_replay_me) {
358 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
359 fh_put(&cstate->current_fh);
360 fh_copy_shallow(&cstate->current_fh.fh_handle,
361 &rp->rp_openfh);
362 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
363 if (status)
364 dprintk("nfsd4_open: replay failed"
365 " restoring previous filehandle\n");
366 else
367 status = nfserr_replay_me;
368 }
369 if (status)
370 goto out;
371 if (open->op_xdr_error) {
372 status = open->op_xdr_error;
373 goto out;
374 }
375
376 status = nfsd4_check_open_attributes(rqstp, cstate, open);
377 if (status)
378 goto out;
379
380 /* Openowner is now set, so sequence id will get bumped. Now we need
381 * these checks before we do any creates: */
382 status = nfserr_grace;
383 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
384 goto out;
385 status = nfserr_no_grace;
386 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
387 goto out;
388
389 switch (open->op_claim_type) {
390 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
391 case NFS4_OPEN_CLAIM_NULL:
392 status = do_open_lookup(rqstp, cstate, open);
393 if (status)
394 goto out;
395 break;
396 case NFS4_OPEN_CLAIM_PREVIOUS:
397 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
398 status = nfs4_check_open_reclaim(&open->op_clientid,
399 cstate->minorversion,
400 nn);
401 if (status)
402 goto out;
403 case NFS4_OPEN_CLAIM_FH:
404 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
405 status = do_open_fhandle(rqstp, cstate, open);
406 if (status)
407 goto out;
408 break;
409 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
410 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
411 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
412 dprintk("NFSD: unsupported OPEN claim type %d\n",
413 open->op_claim_type);
414 status = nfserr_notsupp;
415 goto out;
416 default:
417 dprintk("NFSD: Invalid OPEN claim type %d\n",
418 open->op_claim_type);
419 status = nfserr_inval;
420 goto out;
421 }
422 /*
423 * nfsd4_process_open2() does the actual opening of the file. If
424 * successful, it (1) truncates the file if open->op_truncate was
425 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
426 */
427 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
428 WARN_ON(status && open->op_created);
429 out:
430 nfsd4_cleanup_open_state(open, status);
431 if (open->op_openowner && !nfsd4_has_session(cstate))
432 cstate->replay_owner = &open->op_openowner->oo_owner;
433 nfsd4_bump_seqid(cstate, status);
434 if (!cstate->replay_owner)
435 nfs4_unlock_state();
436 return status;
437 }
438
439 /*
440 * OPEN is the only seqid-mutating operation whose decoding can fail
441 * with a seqid-mutating error (specifically, decoding of user names in
442 * the attributes). Therefore we have to do some processing to look up
443 * the stateowner so that we can bump the seqid.
444 */
445 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
446 {
447 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
448
449 if (!seqid_mutating_err(ntohl(op->status)))
450 return op->status;
451 if (nfsd4_has_session(cstate))
452 return op->status;
453 open->op_xdr_error = op->status;
454 return nfsd4_open(rqstp, cstate, open);
455 }
456
457 /*
458 * filehandle-manipulating ops.
459 */
460 static __be32
461 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
462 struct svc_fh **getfh)
463 {
464 if (!cstate->current_fh.fh_dentry)
465 return nfserr_nofilehandle;
466
467 *getfh = &cstate->current_fh;
468 return nfs_ok;
469 }
470
471 static __be32
472 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
473 struct nfsd4_putfh *putfh)
474 {
475 fh_put(&cstate->current_fh);
476 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
477 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
478 putfh->pf_fhlen);
479 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
480 }
481
482 static __be32
483 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
484 void *arg)
485 {
486 __be32 status;
487
488 fh_put(&cstate->current_fh);
489 status = exp_pseudoroot(rqstp, &cstate->current_fh);
490 return status;
491 }
492
493 static __be32
494 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
495 void *arg)
496 {
497 if (!cstate->save_fh.fh_dentry)
498 return nfserr_restorefh;
499
500 fh_dup2(&cstate->current_fh, &cstate->save_fh);
501 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
502 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
503 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
504 }
505 return nfs_ok;
506 }
507
508 static __be32
509 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
510 void *arg)
511 {
512 if (!cstate->current_fh.fh_dentry)
513 return nfserr_nofilehandle;
514
515 fh_dup2(&cstate->save_fh, &cstate->current_fh);
516 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
517 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
518 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
519 }
520 return nfs_ok;
521 }
522
523 /*
524 * misc nfsv4 ops
525 */
526 static __be32
527 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
528 struct nfsd4_access *access)
529 {
530 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
531 return nfserr_inval;
532
533 access->ac_resp_access = access->ac_req_access;
534 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
535 &access->ac_supported);
536 }
537
538 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
539 {
540 __be32 verf[2];
541 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
542
543 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
544 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
545 memcpy(verifier->data, verf, sizeof(verifier->data));
546 }
547
548 static __be32
549 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
550 struct nfsd4_commit *commit)
551 {
552 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
553 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
554 commit->co_count);
555 }
556
557 static __be32
558 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
559 struct nfsd4_create *create)
560 {
561 struct svc_fh resfh;
562 __be32 status;
563 dev_t rdev;
564
565 fh_init(&resfh, NFS4_FHSIZE);
566
567 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
568 NFSD_MAY_CREATE);
569 if (status)
570 return status;
571
572 status = check_attr_support(rqstp, cstate, create->cr_bmval,
573 nfsd_attrmask);
574 if (status)
575 return status;
576
577 switch (create->cr_type) {
578 case NF4LNK:
579 /* ugh! we have to null-terminate the linktext, or
580 * vfs_symlink() will choke. it is always safe to
581 * null-terminate by brute force, since at worst we
582 * will overwrite the first byte of the create namelen
583 * in the XDR buffer, which has already been extracted
584 * during XDR decode.
585 */
586 create->cr_linkname[create->cr_linklen] = 0;
587
588 status = nfsd_symlink(rqstp, &cstate->current_fh,
589 create->cr_name, create->cr_namelen,
590 create->cr_linkname, create->cr_linklen,
591 &resfh, &create->cr_iattr);
592 break;
593
594 case NF4BLK:
595 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
596 if (MAJOR(rdev) != create->cr_specdata1 ||
597 MINOR(rdev) != create->cr_specdata2)
598 return nfserr_inval;
599 status = nfsd_create(rqstp, &cstate->current_fh,
600 create->cr_name, create->cr_namelen,
601 &create->cr_iattr, S_IFBLK, rdev, &resfh);
602 break;
603
604 case NF4CHR:
605 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
606 if (MAJOR(rdev) != create->cr_specdata1 ||
607 MINOR(rdev) != create->cr_specdata2)
608 return nfserr_inval;
609 status = nfsd_create(rqstp, &cstate->current_fh,
610 create->cr_name, create->cr_namelen,
611 &create->cr_iattr,S_IFCHR, rdev, &resfh);
612 break;
613
614 case NF4SOCK:
615 status = nfsd_create(rqstp, &cstate->current_fh,
616 create->cr_name, create->cr_namelen,
617 &create->cr_iattr, S_IFSOCK, 0, &resfh);
618 break;
619
620 case NF4FIFO:
621 status = nfsd_create(rqstp, &cstate->current_fh,
622 create->cr_name, create->cr_namelen,
623 &create->cr_iattr, S_IFIFO, 0, &resfh);
624 break;
625
626 case NF4DIR:
627 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
628 status = nfsd_create(rqstp, &cstate->current_fh,
629 create->cr_name, create->cr_namelen,
630 &create->cr_iattr, S_IFDIR, 0, &resfh);
631 break;
632
633 default:
634 status = nfserr_badtype;
635 }
636
637 if (status)
638 goto out;
639
640 if (create->cr_acl != NULL)
641 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
642 create->cr_bmval);
643
644 fh_unlock(&cstate->current_fh);
645 set_change_info(&create->cr_cinfo, &cstate->current_fh);
646 fh_dup2(&cstate->current_fh, &resfh);
647 out:
648 fh_put(&resfh);
649 return status;
650 }
651
652 static __be32
653 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
654 struct nfsd4_getattr *getattr)
655 {
656 __be32 status;
657
658 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
659 if (status)
660 return status;
661
662 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
663 return nfserr_inval;
664
665 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
666 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
667 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
668
669 getattr->ga_fhp = &cstate->current_fh;
670 return nfs_ok;
671 }
672
673 static __be32
674 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
675 struct nfsd4_link *link)
676 {
677 __be32 status = nfserr_nofilehandle;
678
679 if (!cstate->save_fh.fh_dentry)
680 return status;
681 status = nfsd_link(rqstp, &cstate->current_fh,
682 link->li_name, link->li_namelen, &cstate->save_fh);
683 if (!status)
684 set_change_info(&link->li_cinfo, &cstate->current_fh);
685 return status;
686 }
687
688 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
689 {
690 struct svc_fh tmp_fh;
691 __be32 ret;
692
693 fh_init(&tmp_fh, NFS4_FHSIZE);
694 ret = exp_pseudoroot(rqstp, &tmp_fh);
695 if (ret)
696 return ret;
697 if (tmp_fh.fh_dentry == fh->fh_dentry) {
698 fh_put(&tmp_fh);
699 return nfserr_noent;
700 }
701 fh_put(&tmp_fh);
702 return nfsd_lookup(rqstp, fh, "..", 2, fh);
703 }
704
705 static __be32
706 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
707 void *arg)
708 {
709 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
710 }
711
712 static __be32
713 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
714 struct nfsd4_lookup *lookup)
715 {
716 return nfsd_lookup(rqstp, &cstate->current_fh,
717 lookup->lo_name, lookup->lo_len,
718 &cstate->current_fh);
719 }
720
721 static __be32
722 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
723 struct nfsd4_read *read)
724 {
725 __be32 status;
726
727 /* no need to check permission - this will be done in nfsd_read() */
728
729 read->rd_filp = NULL;
730 if (read->rd_offset >= OFFSET_MAX)
731 return nfserr_inval;
732
733 /*
734 * If we do a zero copy read, then a client will see read data
735 * that reflects the state of the file *after* performing the
736 * following compound.
737 *
738 * To ensure proper ordering, we therefore turn off zero copy if
739 * the client wants us to do more in this compound:
740 */
741 if (!nfsd4_last_compound_op(rqstp))
742 rqstp->rq_splice_ok = false;
743
744 nfs4_lock_state();
745 /* check stateid */
746 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
747 cstate, &read->rd_stateid,
748 RD_STATE, &read->rd_filp))) {
749 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
750 goto out;
751 }
752 if (read->rd_filp)
753 get_file(read->rd_filp);
754 status = nfs_ok;
755 out:
756 nfs4_unlock_state();
757 read->rd_rqstp = rqstp;
758 read->rd_fhp = &cstate->current_fh;
759 return status;
760 }
761
762 static __be32
763 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
764 struct nfsd4_readdir *readdir)
765 {
766 u64 cookie = readdir->rd_cookie;
767 static const nfs4_verifier zeroverf;
768
769 /* no need to check permission - this will be done in nfsd_readdir() */
770
771 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
772 return nfserr_inval;
773
774 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
775 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
776 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
777
778 if ((cookie == 1) || (cookie == 2) ||
779 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
780 return nfserr_bad_cookie;
781
782 readdir->rd_rqstp = rqstp;
783 readdir->rd_fhp = &cstate->current_fh;
784 return nfs_ok;
785 }
786
787 static __be32
788 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
789 struct nfsd4_readlink *readlink)
790 {
791 readlink->rl_rqstp = rqstp;
792 readlink->rl_fhp = &cstate->current_fh;
793 return nfs_ok;
794 }
795
796 static __be32
797 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
798 struct nfsd4_remove *remove)
799 {
800 __be32 status;
801
802 if (locks_in_grace(SVC_NET(rqstp)))
803 return nfserr_grace;
804 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
805 remove->rm_name, remove->rm_namelen);
806 if (!status) {
807 fh_unlock(&cstate->current_fh);
808 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
809 }
810 return status;
811 }
812
813 static __be32
814 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
815 struct nfsd4_rename *rename)
816 {
817 __be32 status = nfserr_nofilehandle;
818
819 if (!cstate->save_fh.fh_dentry)
820 return status;
821 if (locks_in_grace(SVC_NET(rqstp)) &&
822 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
823 return nfserr_grace;
824 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
825 rename->rn_snamelen, &cstate->current_fh,
826 rename->rn_tname, rename->rn_tnamelen);
827 if (status)
828 return status;
829 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
830 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
831 return nfs_ok;
832 }
833
834 static __be32
835 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
836 struct nfsd4_secinfo *secinfo)
837 {
838 struct svc_fh resfh;
839 struct svc_export *exp;
840 struct dentry *dentry;
841 __be32 err;
842
843 fh_init(&resfh, NFS4_FHSIZE);
844 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
845 if (err)
846 return err;
847 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
848 secinfo->si_name, secinfo->si_namelen,
849 &exp, &dentry);
850 if (err)
851 return err;
852 if (dentry->d_inode == NULL) {
853 exp_put(exp);
854 err = nfserr_noent;
855 } else
856 secinfo->si_exp = exp;
857 dput(dentry);
858 if (cstate->minorversion)
859 /* See rfc 5661 section 2.6.3.1.1.8 */
860 fh_put(&cstate->current_fh);
861 return err;
862 }
863
864 static __be32
865 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
866 struct nfsd4_secinfo_no_name *sin)
867 {
868 __be32 err;
869
870 switch (sin->sin_style) {
871 case NFS4_SECINFO_STYLE4_CURRENT_FH:
872 break;
873 case NFS4_SECINFO_STYLE4_PARENT:
874 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
875 if (err)
876 return err;
877 break;
878 default:
879 return nfserr_inval;
880 }
881 exp_get(cstate->current_fh.fh_export);
882 sin->sin_exp = cstate->current_fh.fh_export;
883 fh_put(&cstate->current_fh);
884 return nfs_ok;
885 }
886
887 static __be32
888 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
889 struct nfsd4_setattr *setattr)
890 {
891 __be32 status = nfs_ok;
892 int err;
893
894 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
895 nfs4_lock_state();
896 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
897 &setattr->sa_stateid, WR_STATE, NULL);
898 nfs4_unlock_state();
899 if (status) {
900 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
901 return status;
902 }
903 }
904 err = fh_want_write(&cstate->current_fh);
905 if (err)
906 return nfserrno(err);
907 status = nfs_ok;
908
909 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
910 nfsd_attrmask);
911 if (status)
912 goto out;
913
914 if (setattr->sa_acl != NULL)
915 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
916 setattr->sa_acl);
917 if (status)
918 goto out;
919 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
920 0, (time_t)0);
921 out:
922 fh_drop_write(&cstate->current_fh);
923 return status;
924 }
925
926 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
927 {
928 int i = 1;
929 int buflen = write->wr_buflen;
930
931 vec[0].iov_base = write->wr_head.iov_base;
932 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
933 buflen -= vec[0].iov_len;
934
935 while (buflen) {
936 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
937 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
938 buflen -= vec[i].iov_len;
939 i++;
940 }
941 return i;
942 }
943
944 static __be32
945 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
946 struct nfsd4_write *write)
947 {
948 stateid_t *stateid = &write->wr_stateid;
949 struct file *filp = NULL;
950 __be32 status = nfs_ok;
951 unsigned long cnt;
952 int nvecs;
953
954 /* no need to check permission - this will be done in nfsd_write() */
955
956 if (write->wr_offset >= OFFSET_MAX)
957 return nfserr_inval;
958
959 nfs4_lock_state();
960 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
961 cstate, stateid, WR_STATE, &filp);
962 if (status) {
963 nfs4_unlock_state();
964 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
965 return status;
966 }
967 if (filp)
968 get_file(filp);
969 nfs4_unlock_state();
970
971 cnt = write->wr_buflen;
972 write->wr_how_written = write->wr_stable_how;
973 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
974
975 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
976 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
977
978 status = nfsd_write(rqstp, &cstate->current_fh, filp,
979 write->wr_offset, rqstp->rq_vec, nvecs,
980 &cnt, &write->wr_how_written);
981 if (filp)
982 fput(filp);
983
984 write->wr_bytes_written = cnt;
985
986 return status;
987 }
988
989 /* This routine never returns NFS_OK! If there are no other errors, it
990 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
991 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
992 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
993 */
994 static __be32
995 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
996 struct nfsd4_verify *verify)
997 {
998 __be32 *buf, *p;
999 int count;
1000 __be32 status;
1001
1002 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1003 if (status)
1004 return status;
1005
1006 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1007 if (status)
1008 return status;
1009
1010 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1011 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1012 return nfserr_inval;
1013 if (verify->ve_attrlen & 3)
1014 return nfserr_inval;
1015
1016 /* count in words:
1017 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1018 */
1019 count = 4 + (verify->ve_attrlen >> 2);
1020 buf = kmalloc(count << 2, GFP_KERNEL);
1021 if (!buf)
1022 return nfserr_jukebox;
1023
1024 p = buf;
1025 status = nfsd4_encode_fattr(&cstate->current_fh,
1026 cstate->current_fh.fh_export,
1027 cstate->current_fh.fh_dentry, &p,
1028 count, verify->ve_bmval,
1029 rqstp, 0);
1030
1031 /* this means that nfsd4_encode_fattr() ran out of space */
1032 if (status == nfserr_resource)
1033 status = nfserr_not_same;
1034 if (status)
1035 goto out_kfree;
1036
1037 /* skip bitmap */
1038 p = buf + 1 + ntohl(buf[0]);
1039 status = nfserr_not_same;
1040 if (ntohl(*p++) != verify->ve_attrlen)
1041 goto out_kfree;
1042 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1043 status = nfserr_same;
1044
1045 out_kfree:
1046 kfree(buf);
1047 return status;
1048 }
1049
1050 static __be32
1051 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1052 struct nfsd4_verify *verify)
1053 {
1054 __be32 status;
1055
1056 status = _nfsd4_verify(rqstp, cstate, verify);
1057 return status == nfserr_not_same ? nfs_ok : status;
1058 }
1059
1060 static __be32
1061 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1062 struct nfsd4_verify *verify)
1063 {
1064 __be32 status;
1065
1066 status = _nfsd4_verify(rqstp, cstate, verify);
1067 return status == nfserr_same ? nfs_ok : status;
1068 }
1069
1070 /*
1071 * NULL call.
1072 */
1073 static __be32
1074 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1075 {
1076 return nfs_ok;
1077 }
1078
1079 static inline void nfsd4_increment_op_stats(u32 opnum)
1080 {
1081 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1082 nfsdstats.nfs4_opcount[opnum]++;
1083 }
1084
1085 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1086 void *);
1087 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1088 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1089 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1090
1091 enum nfsd4_op_flags {
1092 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1093 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1094 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1095 /* For rfc 5661 section 2.6.3.1.1: */
1096 OP_HANDLES_WRONGSEC = 1 << 3,
1097 OP_IS_PUTFH_LIKE = 1 << 4,
1098 /*
1099 * These are the ops whose result size we estimate before
1100 * encoding, to avoid performing an op then not being able to
1101 * respond or cache a response. This includes writes and setattrs
1102 * as well as the operations usually called "nonidempotent":
1103 */
1104 OP_MODIFIES_SOMETHING = 1 << 5,
1105 /*
1106 * Cache compounds containing these ops in the xid-based drc:
1107 * We use the DRC for compounds containing non-idempotent
1108 * operations, *except* those that are 4.1-specific (since
1109 * sessions provide their own EOS), and except for stateful
1110 * operations other than setclientid and setclientid_confirm
1111 * (since sequence numbers provide EOS for open, lock, etc in
1112 * the v4.0 case).
1113 */
1114 OP_CACHEME = 1 << 6,
1115 /*
1116 * These are ops which clear current state id.
1117 */
1118 OP_CLEAR_STATEID = 1 << 7,
1119 };
1120
1121 struct nfsd4_operation {
1122 nfsd4op_func op_func;
1123 u32 op_flags;
1124 char *op_name;
1125 /* Try to get response size before operation */
1126 nfsd4op_rsize op_rsize_bop;
1127 stateid_getter op_get_currentstateid;
1128 stateid_setter op_set_currentstateid;
1129 };
1130
1131 static struct nfsd4_operation nfsd4_ops[];
1132
1133 #ifdef NFSD_DEBUG
1134 static const char *nfsd4_op_name(unsigned opnum);
1135 #endif
1136
1137 /*
1138 * Enforce NFSv4.1 COMPOUND ordering rules:
1139 *
1140 * Also note, enforced elsewhere:
1141 * - SEQUENCE other than as first op results in
1142 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1143 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1144 * (Enforced in nfsd4_bind_conn_to_session().)
1145 * - DESTROY_SESSION must be the final operation in a compound, if
1146 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1147 * (Enforced in nfsd4_destroy_session().)
1148 */
1149 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1150 {
1151 struct nfsd4_op *op = &args->ops[0];
1152
1153 /* These ordering requirements don't apply to NFSv4.0: */
1154 if (args->minorversion == 0)
1155 return nfs_ok;
1156 /* This is weird, but OK, not our problem: */
1157 if (args->opcnt == 0)
1158 return nfs_ok;
1159 if (op->status == nfserr_op_illegal)
1160 return nfs_ok;
1161 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1162 return nfserr_op_not_in_session;
1163 if (op->opnum == OP_SEQUENCE)
1164 return nfs_ok;
1165 if (args->opcnt != 1)
1166 return nfserr_not_only_op;
1167 return nfs_ok;
1168 }
1169
1170 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1171 {
1172 return &nfsd4_ops[op->opnum];
1173 }
1174
1175 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1176 {
1177 return OPDESC(op)->op_flags & OP_CACHEME;
1178 }
1179
1180 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1181 {
1182 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1183 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1184 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1185 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1186 struct nfsd4_operation *thisd;
1187 struct nfsd4_operation *nextd;
1188
1189 thisd = OPDESC(this);
1190 /*
1191 * Most ops check wronsec on our own; only the putfh-like ops
1192 * have special rules.
1193 */
1194 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1195 return false;
1196 /*
1197 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1198 * put-filehandle operation if we're not going to use the
1199 * result:
1200 */
1201 if (argp->opcnt == resp->opcnt)
1202 return false;
1203
1204 nextd = OPDESC(next);
1205 /*
1206 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1207 * errors themselves as necessary; others should check for them
1208 * now:
1209 */
1210 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1211 }
1212
1213 /*
1214 * COMPOUND call.
1215 */
1216 static __be32
1217 nfsd4_proc_compound(struct svc_rqst *rqstp,
1218 struct nfsd4_compoundargs *args,
1219 struct nfsd4_compoundres *resp)
1220 {
1221 struct nfsd4_op *op;
1222 struct nfsd4_operation *opdesc;
1223 struct nfsd4_compound_state *cstate = &resp->cstate;
1224 int slack_bytes;
1225 u32 plen = 0;
1226 __be32 status;
1227
1228 resp->xbuf = &rqstp->rq_res;
1229 resp->p = rqstp->rq_res.head[0].iov_base +
1230 rqstp->rq_res.head[0].iov_len;
1231 resp->tagp = resp->p;
1232 /* reserve space for: taglen, tag, and opcnt */
1233 resp->p += 2 + XDR_QUADLEN(args->taglen);
1234 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1235 resp->taglen = args->taglen;
1236 resp->tag = args->tag;
1237 resp->opcnt = 0;
1238 resp->rqstp = rqstp;
1239 resp->cstate.minorversion = args->minorversion;
1240 resp->cstate.replay_owner = NULL;
1241 resp->cstate.session = NULL;
1242 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1243 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1244 /*
1245 * Don't use the deferral mechanism for NFSv4; compounds make it
1246 * too hard to avoid non-idempotency problems.
1247 */
1248 rqstp->rq_usedeferral = 0;
1249
1250 /*
1251 * According to RFC3010, this takes precedence over all other errors.
1252 */
1253 status = nfserr_minor_vers_mismatch;
1254 if (args->minorversion > nfsd_supported_minorversion)
1255 goto out;
1256
1257 status = nfs41_check_op_ordering(args);
1258 if (status) {
1259 op = &args->ops[0];
1260 op->status = status;
1261 goto encode_op;
1262 }
1263
1264 while (!status && resp->opcnt < args->opcnt) {
1265 op = &args->ops[resp->opcnt++];
1266
1267 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1268 resp->opcnt, args->opcnt, op->opnum,
1269 nfsd4_op_name(op->opnum));
1270 /*
1271 * The XDR decode routines may have pre-set op->status;
1272 * for example, if there is a miscellaneous XDR error
1273 * it will be set to nfserr_bad_xdr.
1274 */
1275 if (op->status) {
1276 if (op->opnum == OP_OPEN)
1277 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1278 goto encode_op;
1279 }
1280
1281 /* We must be able to encode a successful response to
1282 * this operation, with enough room left over to encode a
1283 * failed response to the next operation. If we don't
1284 * have enough room, fail with ERR_RESOURCE.
1285 */
1286 slack_bytes = (char *)resp->end - (char *)resp->p;
1287 if (slack_bytes < COMPOUND_SLACK_SPACE
1288 + COMPOUND_ERR_SLACK_SPACE) {
1289 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1290 op->status = nfserr_resource;
1291 goto encode_op;
1292 }
1293
1294 opdesc = OPDESC(op);
1295
1296 if (!cstate->current_fh.fh_dentry) {
1297 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1298 op->status = nfserr_nofilehandle;
1299 goto encode_op;
1300 }
1301 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1302 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1303 op->status = nfserr_moved;
1304 goto encode_op;
1305 }
1306
1307 /* If op is non-idempotent */
1308 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1309 plen = opdesc->op_rsize_bop(rqstp, op);
1310 op->status = nfsd4_check_resp_size(resp, plen);
1311 }
1312
1313 if (op->status)
1314 goto encode_op;
1315
1316 if (opdesc->op_get_currentstateid)
1317 opdesc->op_get_currentstateid(cstate, &op->u);
1318 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1319
1320 if (!op->status) {
1321 if (opdesc->op_set_currentstateid)
1322 opdesc->op_set_currentstateid(cstate, &op->u);
1323
1324 if (opdesc->op_flags & OP_CLEAR_STATEID)
1325 clear_current_stateid(cstate);
1326
1327 if (need_wrongsec_check(rqstp))
1328 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1329 }
1330
1331 encode_op:
1332 /* Only from SEQUENCE */
1333 if (resp->cstate.status == nfserr_replay_cache) {
1334 dprintk("%s NFS4.1 replay from cache\n", __func__);
1335 status = op->status;
1336 goto out;
1337 }
1338 if (op->status == nfserr_replay_me) {
1339 op->replay = &cstate->replay_owner->so_replay;
1340 nfsd4_encode_replay(resp, op);
1341 status = op->status = op->replay->rp_status;
1342 } else {
1343 nfsd4_encode_operation(resp, op);
1344 status = op->status;
1345 }
1346
1347 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1348 args->ops, args->opcnt, resp->opcnt, op->opnum,
1349 be32_to_cpu(status));
1350
1351 if (cstate->replay_owner) {
1352 nfs4_unlock_state();
1353 cstate->replay_owner = NULL;
1354 }
1355 /* XXX Ugh, we need to get rid of this kind of special case: */
1356 if (op->opnum == OP_READ && op->u.read.rd_filp)
1357 fput(op->u.read.rd_filp);
1358
1359 nfsd4_increment_op_stats(op->opnum);
1360 }
1361
1362 resp->cstate.status = status;
1363 fh_put(&resp->cstate.current_fh);
1364 fh_put(&resp->cstate.save_fh);
1365 BUG_ON(resp->cstate.replay_owner);
1366 out:
1367 /* Reset deferral mechanism for RPC deferrals */
1368 rqstp->rq_usedeferral = 1;
1369 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1370 return status;
1371 }
1372
1373 #define op_encode_hdr_size (2)
1374 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1375 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1376 #define op_encode_change_info_maxsz (5)
1377 #define nfs4_fattr_bitmap_maxsz (4)
1378
1379 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1380 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1381
1382 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1383
1384 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1385 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1386 op_encode_ace_maxsz)
1387
1388 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1389
1390 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1391 {
1392 return (op_encode_hdr_size) * sizeof(__be32);
1393 }
1394
1395 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1396 {
1397 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1398 }
1399
1400 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1401 {
1402 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1403 }
1404
1405 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1406 {
1407 return (op_encode_hdr_size + op_encode_change_info_maxsz
1408 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1409 }
1410
1411 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1412 {
1413 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1414 * sizeof(__be32);
1415 }
1416
1417 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1418 {
1419 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1420 * sizeof(__be32);
1421 }
1422
1423 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1424 {
1425 return (op_encode_hdr_size + op_encode_stateid_maxsz
1426 + op_encode_change_info_maxsz + 1
1427 + nfs4_fattr_bitmap_maxsz
1428 + op_encode_delegation_maxsz) * sizeof(__be32);
1429 }
1430
1431 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1432 {
1433 u32 maxcount = 0, rlen = 0;
1434
1435 maxcount = svc_max_payload(rqstp);
1436 rlen = op->u.read.rd_length;
1437
1438 if (rlen > maxcount)
1439 rlen = maxcount;
1440
1441 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1442 }
1443
1444 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1445 {
1446 u32 rlen = op->u.readdir.rd_maxcount;
1447
1448 if (rlen > PAGE_SIZE)
1449 rlen = PAGE_SIZE;
1450
1451 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1452 * sizeof(__be32) + rlen;
1453 }
1454
1455 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1456 {
1457 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1458 * sizeof(__be32);
1459 }
1460
1461 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1462 {
1463 return (op_encode_hdr_size + op_encode_change_info_maxsz
1464 + op_encode_change_info_maxsz) * sizeof(__be32);
1465 }
1466
1467 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1468 {
1469 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1470 }
1471
1472 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1473 {
1474 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1475 }
1476
1477 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1478 {
1479 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1480 }
1481
1482 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1483 {
1484 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1485 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1486 2 + /*eir_server_owner.so_minor_id */\
1487 /* eir_server_owner.so_major_id<> */\
1488 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1489 /* eir_server_scope<> */\
1490 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1491 1 + /* eir_server_impl_id array length */\
1492 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1493 }
1494
1495 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1496 {
1497 return (op_encode_hdr_size + \
1498 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1499 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1500 }
1501
1502 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1503 {
1504 return (op_encode_hdr_size + \
1505 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1506 2 + /* csr_sequence, csr_flags */\
1507 op_encode_channel_attrs_maxsz + \
1508 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1509 }
1510
1511 static struct nfsd4_operation nfsd4_ops[] = {
1512 [OP_ACCESS] = {
1513 .op_func = (nfsd4op_func)nfsd4_access,
1514 .op_name = "OP_ACCESS",
1515 },
1516 [OP_CLOSE] = {
1517 .op_func = (nfsd4op_func)nfsd4_close,
1518 .op_flags = OP_MODIFIES_SOMETHING,
1519 .op_name = "OP_CLOSE",
1520 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1521 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1522 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1523 },
1524 [OP_COMMIT] = {
1525 .op_func = (nfsd4op_func)nfsd4_commit,
1526 .op_flags = OP_MODIFIES_SOMETHING,
1527 .op_name = "OP_COMMIT",
1528 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1529 },
1530 [OP_CREATE] = {
1531 .op_func = (nfsd4op_func)nfsd4_create,
1532 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1533 .op_name = "OP_CREATE",
1534 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1535 },
1536 [OP_DELEGRETURN] = {
1537 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1538 .op_flags = OP_MODIFIES_SOMETHING,
1539 .op_name = "OP_DELEGRETURN",
1540 .op_rsize_bop = nfsd4_only_status_rsize,
1541 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1542 },
1543 [OP_GETATTR] = {
1544 .op_func = (nfsd4op_func)nfsd4_getattr,
1545 .op_flags = ALLOWED_ON_ABSENT_FS,
1546 .op_name = "OP_GETATTR",
1547 },
1548 [OP_GETFH] = {
1549 .op_func = (nfsd4op_func)nfsd4_getfh,
1550 .op_name = "OP_GETFH",
1551 },
1552 [OP_LINK] = {
1553 .op_func = (nfsd4op_func)nfsd4_link,
1554 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1555 | OP_CACHEME,
1556 .op_name = "OP_LINK",
1557 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1558 },
1559 [OP_LOCK] = {
1560 .op_func = (nfsd4op_func)nfsd4_lock,
1561 .op_flags = OP_MODIFIES_SOMETHING,
1562 .op_name = "OP_LOCK",
1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1564 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1565 },
1566 [OP_LOCKT] = {
1567 .op_func = (nfsd4op_func)nfsd4_lockt,
1568 .op_name = "OP_LOCKT",
1569 },
1570 [OP_LOCKU] = {
1571 .op_func = (nfsd4op_func)nfsd4_locku,
1572 .op_flags = OP_MODIFIES_SOMETHING,
1573 .op_name = "OP_LOCKU",
1574 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1575 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1576 },
1577 [OP_LOOKUP] = {
1578 .op_func = (nfsd4op_func)nfsd4_lookup,
1579 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1580 .op_name = "OP_LOOKUP",
1581 },
1582 [OP_LOOKUPP] = {
1583 .op_func = (nfsd4op_func)nfsd4_lookupp,
1584 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1585 .op_name = "OP_LOOKUPP",
1586 },
1587 [OP_NVERIFY] = {
1588 .op_func = (nfsd4op_func)nfsd4_nverify,
1589 .op_name = "OP_NVERIFY",
1590 },
1591 [OP_OPEN] = {
1592 .op_func = (nfsd4op_func)nfsd4_open,
1593 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1594 .op_name = "OP_OPEN",
1595 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1596 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1597 },
1598 [OP_OPEN_CONFIRM] = {
1599 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1600 .op_flags = OP_MODIFIES_SOMETHING,
1601 .op_name = "OP_OPEN_CONFIRM",
1602 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1603 },
1604 [OP_OPEN_DOWNGRADE] = {
1605 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1606 .op_flags = OP_MODIFIES_SOMETHING,
1607 .op_name = "OP_OPEN_DOWNGRADE",
1608 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1609 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1610 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1611 },
1612 [OP_PUTFH] = {
1613 .op_func = (nfsd4op_func)nfsd4_putfh,
1614 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1615 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1616 | OP_CLEAR_STATEID,
1617 .op_name = "OP_PUTFH",
1618 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1619 },
1620 [OP_PUTPUBFH] = {
1621 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1622 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1623 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1624 | OP_CLEAR_STATEID,
1625 .op_name = "OP_PUTPUBFH",
1626 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1627 },
1628 [OP_PUTROOTFH] = {
1629 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1630 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1631 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1632 | OP_CLEAR_STATEID,
1633 .op_name = "OP_PUTROOTFH",
1634 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1635 },
1636 [OP_READ] = {
1637 .op_func = (nfsd4op_func)nfsd4_read,
1638 .op_flags = OP_MODIFIES_SOMETHING,
1639 .op_name = "OP_READ",
1640 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1641 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1642 },
1643 [OP_READDIR] = {
1644 .op_func = (nfsd4op_func)nfsd4_readdir,
1645 .op_flags = OP_MODIFIES_SOMETHING,
1646 .op_name = "OP_READDIR",
1647 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1648 },
1649 [OP_READLINK] = {
1650 .op_func = (nfsd4op_func)nfsd4_readlink,
1651 .op_name = "OP_READLINK",
1652 },
1653 [OP_REMOVE] = {
1654 .op_func = (nfsd4op_func)nfsd4_remove,
1655 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1656 .op_name = "OP_REMOVE",
1657 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1658 },
1659 [OP_RENAME] = {
1660 .op_func = (nfsd4op_func)nfsd4_rename,
1661 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1662 .op_name = "OP_RENAME",
1663 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1664 },
1665 [OP_RENEW] = {
1666 .op_func = (nfsd4op_func)nfsd4_renew,
1667 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1668 | OP_MODIFIES_SOMETHING,
1669 .op_name = "OP_RENEW",
1670 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1671
1672 },
1673 [OP_RESTOREFH] = {
1674 .op_func = (nfsd4op_func)nfsd4_restorefh,
1675 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1676 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1677 .op_name = "OP_RESTOREFH",
1678 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1679 },
1680 [OP_SAVEFH] = {
1681 .op_func = (nfsd4op_func)nfsd4_savefh,
1682 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1683 .op_name = "OP_SAVEFH",
1684 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1685 },
1686 [OP_SECINFO] = {
1687 .op_func = (nfsd4op_func)nfsd4_secinfo,
1688 .op_flags = OP_HANDLES_WRONGSEC,
1689 .op_name = "OP_SECINFO",
1690 },
1691 [OP_SETATTR] = {
1692 .op_func = (nfsd4op_func)nfsd4_setattr,
1693 .op_name = "OP_SETATTR",
1694 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1695 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1696 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1697 },
1698 [OP_SETCLIENTID] = {
1699 .op_func = (nfsd4op_func)nfsd4_setclientid,
1700 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1701 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1702 .op_name = "OP_SETCLIENTID",
1703 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1704 },
1705 [OP_SETCLIENTID_CONFIRM] = {
1706 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1707 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1708 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1709 .op_name = "OP_SETCLIENTID_CONFIRM",
1710 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1711 },
1712 [OP_VERIFY] = {
1713 .op_func = (nfsd4op_func)nfsd4_verify,
1714 .op_name = "OP_VERIFY",
1715 },
1716 [OP_WRITE] = {
1717 .op_func = (nfsd4op_func)nfsd4_write,
1718 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1719 .op_name = "OP_WRITE",
1720 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1721 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1722 },
1723 [OP_RELEASE_LOCKOWNER] = {
1724 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1725 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1726 | OP_MODIFIES_SOMETHING,
1727 .op_name = "OP_RELEASE_LOCKOWNER",
1728 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1729 },
1730
1731 /* NFSv4.1 operations */
1732 [OP_EXCHANGE_ID] = {
1733 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1734 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1735 | OP_MODIFIES_SOMETHING,
1736 .op_name = "OP_EXCHANGE_ID",
1737 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1738 },
1739 [OP_BACKCHANNEL_CTL] = {
1740 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1741 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1742 .op_name = "OP_BACKCHANNEL_CTL",
1743 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1744 },
1745 [OP_BIND_CONN_TO_SESSION] = {
1746 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1747 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1748 | OP_MODIFIES_SOMETHING,
1749 .op_name = "OP_BIND_CONN_TO_SESSION",
1750 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1751 },
1752 [OP_CREATE_SESSION] = {
1753 .op_func = (nfsd4op_func)nfsd4_create_session,
1754 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1755 | OP_MODIFIES_SOMETHING,
1756 .op_name = "OP_CREATE_SESSION",
1757 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1758 },
1759 [OP_DESTROY_SESSION] = {
1760 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1761 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1762 | OP_MODIFIES_SOMETHING,
1763 .op_name = "OP_DESTROY_SESSION",
1764 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1765 },
1766 [OP_SEQUENCE] = {
1767 .op_func = (nfsd4op_func)nfsd4_sequence,
1768 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1769 .op_name = "OP_SEQUENCE",
1770 },
1771 [OP_DESTROY_CLIENTID] = {
1772 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1773 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1774 | OP_MODIFIES_SOMETHING,
1775 .op_name = "OP_DESTROY_CLIENTID",
1776 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1777 },
1778 [OP_RECLAIM_COMPLETE] = {
1779 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1780 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1781 .op_name = "OP_RECLAIM_COMPLETE",
1782 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1783 },
1784 [OP_SECINFO_NO_NAME] = {
1785 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1786 .op_flags = OP_HANDLES_WRONGSEC,
1787 .op_name = "OP_SECINFO_NO_NAME",
1788 },
1789 [OP_TEST_STATEID] = {
1790 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1791 .op_flags = ALLOWED_WITHOUT_FH,
1792 .op_name = "OP_TEST_STATEID",
1793 },
1794 [OP_FREE_STATEID] = {
1795 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1796 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1797 .op_name = "OP_FREE_STATEID",
1798 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1799 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1800 },
1801 };
1802
1803 #ifdef NFSD_DEBUG
1804 static const char *nfsd4_op_name(unsigned opnum)
1805 {
1806 if (opnum < ARRAY_SIZE(nfsd4_ops))
1807 return nfsd4_ops[opnum].op_name;
1808 return "unknown_operation";
1809 }
1810 #endif
1811
1812 #define nfsd4_voidres nfsd4_voidargs
1813 struct nfsd4_voidargs { int dummy; };
1814
1815 static struct svc_procedure nfsd_procedures4[2] = {
1816 [NFSPROC4_NULL] = {
1817 .pc_func = (svc_procfunc) nfsd4_proc_null,
1818 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1819 .pc_argsize = sizeof(struct nfsd4_voidargs),
1820 .pc_ressize = sizeof(struct nfsd4_voidres),
1821 .pc_cachetype = RC_NOCACHE,
1822 .pc_xdrressize = 1,
1823 },
1824 [NFSPROC4_COMPOUND] = {
1825 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1826 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1827 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1828 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1829 .pc_ressize = sizeof(struct nfsd4_compoundres),
1830 .pc_release = nfsd4_release_compoundargs,
1831 .pc_cachetype = RC_NOCACHE,
1832 .pc_xdrressize = NFSD_BUFSIZE/4,
1833 },
1834 };
1835
1836 struct svc_version nfsd_version4 = {
1837 .vs_vers = 4,
1838 .vs_nproc = 2,
1839 .vs_proc = nfsd_procedures4,
1840 .vs_dispatch = nfsd_dispatch,
1841 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1842 };
1843
1844 /*
1845 * Local variables:
1846 * c-basic-offset: 8
1847 * End:
1848 */
Linux with added FPC-III support