projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
drivers: power: report battery voltage in AOSP compatible format
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4proc.c
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 status = nfsd_symlink(rqstp, &cstate->current_fh,
580 create->cr_name, create->cr_namelen,
581 create->cr_linkname, create->cr_linklen,
582 &resfh, &create->cr_iattr);
583 break;
584
585 case NF4BLK:
586 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
587 if (MAJOR(rdev) != create->cr_specdata1 ||
588 MINOR(rdev) != create->cr_specdata2)
589 return nfserr_inval;
590 status = nfsd_create(rqstp, &cstate->current_fh,
591 create->cr_name, create->cr_namelen,
592 &create->cr_iattr, S_IFBLK, rdev, &resfh);
593 break;
594
595 case NF4CHR:
596 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
597 if (MAJOR(rdev) != create->cr_specdata1 ||
598 MINOR(rdev) != create->cr_specdata2)
599 return nfserr_inval;
600 status = nfsd_create(rqstp, &cstate->current_fh,
601 create->cr_name, create->cr_namelen,
602 &create->cr_iattr,S_IFCHR, rdev, &resfh);
603 break;
604
605 case NF4SOCK:
606 status = nfsd_create(rqstp, &cstate->current_fh,
607 create->cr_name, create->cr_namelen,
608 &create->cr_iattr, S_IFSOCK, 0, &resfh);
609 break;
610
611 case NF4FIFO:
612 status = nfsd_create(rqstp, &cstate->current_fh,
613 create->cr_name, create->cr_namelen,
614 &create->cr_iattr, S_IFIFO, 0, &resfh);
615 break;
616
617 case NF4DIR:
618 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
619 status = nfsd_create(rqstp, &cstate->current_fh,
620 create->cr_name, create->cr_namelen,
621 &create->cr_iattr, S_IFDIR, 0, &resfh);
622 break;
623
624 default:
625 status = nfserr_badtype;
626 }
627
628 if (status)
629 goto out;
630
631 if (create->cr_acl != NULL)
632 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
633 create->cr_bmval);
634
635 fh_unlock(&cstate->current_fh);
636 set_change_info(&create->cr_cinfo, &cstate->current_fh);
637 fh_dup2(&cstate->current_fh, &resfh);
638 out:
639 fh_put(&resfh);
640 return status;
641 }
642
643 static __be32
644 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
645 struct nfsd4_getattr *getattr)
646 {
647 __be32 status;
648
649 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
650 if (status)
651 return status;
652
653 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
654 return nfserr_inval;
655
656 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
657 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
658 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
659
660 getattr->ga_fhp = &cstate->current_fh;
661 return nfs_ok;
662 }
663
664 static __be32
665 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
666 struct nfsd4_link *link)
667 {
668 __be32 status = nfserr_nofilehandle;
669
670 if (!cstate->save_fh.fh_dentry)
671 return status;
672 status = nfsd_link(rqstp, &cstate->current_fh,
673 link->li_name, link->li_namelen, &cstate->save_fh);
674 if (!status)
675 set_change_info(&link->li_cinfo, &cstate->current_fh);
676 return status;
677 }
678
679 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
680 {
681 struct svc_fh tmp_fh;
682 __be32 ret;
683
684 fh_init(&tmp_fh, NFS4_FHSIZE);
685 ret = exp_pseudoroot(rqstp, &tmp_fh);
686 if (ret)
687 return ret;
688 if (tmp_fh.fh_dentry == fh->fh_dentry) {
689 fh_put(&tmp_fh);
690 return nfserr_noent;
691 }
692 fh_put(&tmp_fh);
693 return nfsd_lookup(rqstp, fh, "..", 2, fh);
694 }
695
696 static __be32
697 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
698 void *arg)
699 {
700 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
701 }
702
703 static __be32
704 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
705 struct nfsd4_lookup *lookup)
706 {
707 return nfsd_lookup(rqstp, &cstate->current_fh,
708 lookup->lo_name, lookup->lo_len,
709 &cstate->current_fh);
710 }
711
712 static __be32
713 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
714 struct nfsd4_read *read)
715 {
716 __be32 status;
717
718 /* no need to check permission - this will be done in nfsd_read() */
719
720 read->rd_filp = NULL;
721 if (read->rd_offset >= OFFSET_MAX)
722 return nfserr_inval;
723
724 /*
725 * If we do a zero copy read, then a client will see read data
726 * that reflects the state of the file *after* performing the
727 * following compound.
728 *
729 * To ensure proper ordering, we therefore turn off zero copy if
730 * the client wants us to do more in this compound:
731 */
732 if (!nfsd4_last_compound_op(rqstp))
733 rqstp->rq_splice_ok = false;
734
735 nfs4_lock_state();
736 /* check stateid */
737 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
738 cstate, &read->rd_stateid,
739 RD_STATE, &read->rd_filp))) {
740 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
741 goto out;
742 }
743 if (read->rd_filp)
744 get_file(read->rd_filp);
745 status = nfs_ok;
746 out:
747 nfs4_unlock_state();
748 read->rd_rqstp = rqstp;
749 read->rd_fhp = &cstate->current_fh;
750 return status;
751 }
752
753 static __be32
754 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
755 struct nfsd4_readdir *readdir)
756 {
757 u64 cookie = readdir->rd_cookie;
758 static const nfs4_verifier zeroverf;
759
760 /* no need to check permission - this will be done in nfsd_readdir() */
761
762 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
763 return nfserr_inval;
764
765 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
766 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
767 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
768
769 if ((cookie == 1) || (cookie == 2) ||
770 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
771 return nfserr_bad_cookie;
772
773 readdir->rd_rqstp = rqstp;
774 readdir->rd_fhp = &cstate->current_fh;
775 return nfs_ok;
776 }
777
778 static __be32
779 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
780 struct nfsd4_readlink *readlink)
781 {
782 readlink->rl_rqstp = rqstp;
783 readlink->rl_fhp = &cstate->current_fh;
784 return nfs_ok;
785 }
786
787 static __be32
788 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
789 struct nfsd4_remove *remove)
790 {
791 __be32 status;
792
793 if (locks_in_grace(SVC_NET(rqstp)))
794 return nfserr_grace;
795 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
796 remove->rm_name, remove->rm_namelen);
797 if (!status) {
798 fh_unlock(&cstate->current_fh);
799 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
800 }
801 return status;
802 }
803
804 static __be32
805 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
806 struct nfsd4_rename *rename)
807 {
808 __be32 status = nfserr_nofilehandle;
809
810 if (!cstate->save_fh.fh_dentry)
811 return status;
812 if (locks_in_grace(SVC_NET(rqstp)) &&
813 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
814 return nfserr_grace;
815 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
816 rename->rn_snamelen, &cstate->current_fh,
817 rename->rn_tname, rename->rn_tnamelen);
818 if (status)
819 return status;
820 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
821 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
822 return nfs_ok;
823 }
824
825 static __be32
826 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
827 struct nfsd4_secinfo *secinfo)
828 {
829 struct svc_fh resfh;
830 struct svc_export *exp;
831 struct dentry *dentry;
832 __be32 err;
833
834 fh_init(&resfh, NFS4_FHSIZE);
835 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
836 if (err)
837 return err;
838 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
839 secinfo->si_name, secinfo->si_namelen,
840 &exp, &dentry);
841 if (err)
842 return err;
843 if (dentry->d_inode == NULL) {
844 exp_put(exp);
845 err = nfserr_noent;
846 } else
847 secinfo->si_exp = exp;
848 dput(dentry);
849 if (cstate->minorversion)
850 /* See rfc 5661 section 2.6.3.1.1.8 */
851 fh_put(&cstate->current_fh);
852 return err;
853 }
854
855 static __be32
856 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
857 struct nfsd4_secinfo_no_name *sin)
858 {
859 __be32 err;
860
861 switch (sin->sin_style) {
862 case NFS4_SECINFO_STYLE4_CURRENT_FH:
863 break;
864 case NFS4_SECINFO_STYLE4_PARENT:
865 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
866 if (err)
867 return err;
868 break;
869 default:
870 return nfserr_inval;
871 }
872 exp_get(cstate->current_fh.fh_export);
873 sin->sin_exp = cstate->current_fh.fh_export;
874 fh_put(&cstate->current_fh);
875 return nfs_ok;
876 }
877
878 static __be32
879 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
880 struct nfsd4_setattr *setattr)
881 {
882 __be32 status = nfs_ok;
883 int err;
884
885 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
886 nfs4_lock_state();
887 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
888 &setattr->sa_stateid, WR_STATE, NULL);
889 nfs4_unlock_state();
890 if (status) {
891 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
892 return status;
893 }
894 }
895 err = fh_want_write(&cstate->current_fh);
896 if (err)
897 return nfserrno(err);
898 status = nfs_ok;
899
900 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
901 nfsd_attrmask);
902 if (status)
903 goto out;
904
905 if (setattr->sa_acl != NULL)
906 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
907 setattr->sa_acl);
908 if (status)
909 goto out;
910 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
911 0, (time_t)0);
912 out:
913 fh_drop_write(&cstate->current_fh);
914 return status;
915 }
916
917 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
918 {
919 int i = 1;
920 int buflen = write->wr_buflen;
921
922 vec[0].iov_base = write->wr_head.iov_base;
923 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
924 buflen -= vec[0].iov_len;
925
926 while (buflen) {
927 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
928 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
929 buflen -= vec[i].iov_len;
930 i++;
931 }
932 return i;
933 }
934
935 static __be32
936 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
937 struct nfsd4_write *write)
938 {
939 stateid_t *stateid = &write->wr_stateid;
940 struct file *filp = NULL;
941 __be32 status = nfs_ok;
942 unsigned long cnt;
943 int nvecs;
944
945 /* no need to check permission - this will be done in nfsd_write() */
946
947 if (write->wr_offset >= OFFSET_MAX)
948 return nfserr_inval;
949
950 nfs4_lock_state();
951 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
952 cstate, stateid, WR_STATE, &filp);
953 if (status) {
954 nfs4_unlock_state();
955 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
956 return status;
957 }
958 if (filp)
959 get_file(filp);
960 nfs4_unlock_state();
961
962 cnt = write->wr_buflen;
963 write->wr_how_written = write->wr_stable_how;
964 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
965
966 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
967 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
968
969 status = nfsd_write(rqstp, &cstate->current_fh, filp,
970 write->wr_offset, rqstp->rq_vec, nvecs,
971 &cnt, &write->wr_how_written);
972 if (filp)
973 fput(filp);
974
975 write->wr_bytes_written = cnt;
976
977 return status;
978 }
979
980 /* This routine never returns NFS_OK! If there are no other errors, it
981 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
982 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
983 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
984 */
985 static __be32
986 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
987 struct nfsd4_verify *verify)
988 {
989 __be32 *buf, *p;
990 int count;
991 __be32 status;
992
993 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
994 if (status)
995 return status;
996
997 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
998 if (status)
999 return status;
1000
1001 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1002 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1003 return nfserr_inval;
1004 if (verify->ve_attrlen & 3)
1005 return nfserr_inval;
1006
1007 /* count in words:
1008 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1009 */
1010 count = 4 + (verify->ve_attrlen >> 2);
1011 buf = kmalloc(count << 2, GFP_KERNEL);
1012 if (!buf)
1013 return nfserr_jukebox;
1014
1015 p = buf;
1016 status = nfsd4_encode_fattr(&cstate->current_fh,
1017 cstate->current_fh.fh_export,
1018 cstate->current_fh.fh_dentry, &p,
1019 count, verify->ve_bmval,
1020 rqstp, 0);
1021
1022 /* this means that nfsd4_encode_fattr() ran out of space */
1023 if (status == nfserr_resource)
1024 status = nfserr_not_same;
1025 if (status)
1026 goto out_kfree;
1027
1028 /* skip bitmap */
1029 p = buf + 1 + ntohl(buf[0]);
1030 status = nfserr_not_same;
1031 if (ntohl(*p++) != verify->ve_attrlen)
1032 goto out_kfree;
1033 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1034 status = nfserr_same;
1035
1036 out_kfree:
1037 kfree(buf);
1038 return status;
1039 }
1040
1041 static __be32
1042 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1043 struct nfsd4_verify *verify)
1044 {
1045 __be32 status;
1046
1047 status = _nfsd4_verify(rqstp, cstate, verify);
1048 return status == nfserr_not_same ? nfs_ok : status;
1049 }
1050
1051 static __be32
1052 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1053 struct nfsd4_verify *verify)
1054 {
1055 __be32 status;
1056
1057 status = _nfsd4_verify(rqstp, cstate, verify);
1058 return status == nfserr_same ? nfs_ok : status;
1059 }
1060
1061 /*
1062 * NULL call.
1063 */
1064 static __be32
1065 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1066 {
1067 return nfs_ok;
1068 }
1069
1070 static inline void nfsd4_increment_op_stats(u32 opnum)
1071 {
1072 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1073 nfsdstats.nfs4_opcount[opnum]++;
1074 }
1075
1076 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1077 void *);
1078 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1079 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1080 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1081
1082 enum nfsd4_op_flags {
1083 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1084 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1085 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1086 /* For rfc 5661 section 2.6.3.1.1: */
1087 OP_HANDLES_WRONGSEC = 1 << 3,
1088 OP_IS_PUTFH_LIKE = 1 << 4,
1089 /*
1090 * These are the ops whose result size we estimate before
1091 * encoding, to avoid performing an op then not being able to
1092 * respond or cache a response. This includes writes and setattrs
1093 * as well as the operations usually called "nonidempotent":
1094 */
1095 OP_MODIFIES_SOMETHING = 1 << 5,
1096 /*
1097 * Cache compounds containing these ops in the xid-based drc:
1098 * We use the DRC for compounds containing non-idempotent
1099 * operations, *except* those that are 4.1-specific (since
1100 * sessions provide their own EOS), and except for stateful
1101 * operations other than setclientid and setclientid_confirm
1102 * (since sequence numbers provide EOS for open, lock, etc in
1103 * the v4.0 case).
1104 */
1105 OP_CACHEME = 1 << 6,
1106 /*
1107 * These are ops which clear current state id.
1108 */
1109 OP_CLEAR_STATEID = 1 << 7,
1110 };
1111
1112 struct nfsd4_operation {
1113 nfsd4op_func op_func;
1114 u32 op_flags;
1115 char *op_name;
1116 /* Try to get response size before operation */
1117 nfsd4op_rsize op_rsize_bop;
1118 stateid_getter op_get_currentstateid;
1119 stateid_setter op_set_currentstateid;
1120 };
1121
1122 static struct nfsd4_operation nfsd4_ops[];
1123
1124 #ifdef NFSD_DEBUG
1125 static const char *nfsd4_op_name(unsigned opnum);
1126 #endif
1127
1128 /*
1129 * Enforce NFSv4.1 COMPOUND ordering rules:
1130 *
1131 * Also note, enforced elsewhere:
1132 * - SEQUENCE other than as first op results in
1133 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1134 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1135 * (Enforced in nfsd4_bind_conn_to_session().)
1136 * - DESTROY_SESSION must be the final operation in a compound, if
1137 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1138 * (Enforced in nfsd4_destroy_session().)
1139 */
1140 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1141 {
1142 struct nfsd4_op *op = &args->ops[0];
1143
1144 /* These ordering requirements don't apply to NFSv4.0: */
1145 if (args->minorversion == 0)
1146 return nfs_ok;
1147 /* This is weird, but OK, not our problem: */
1148 if (args->opcnt == 0)
1149 return nfs_ok;
1150 if (op->status == nfserr_op_illegal)
1151 return nfs_ok;
1152 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1153 return nfserr_op_not_in_session;
1154 if (op->opnum == OP_SEQUENCE)
1155 return nfs_ok;
1156 if (args->opcnt != 1)
1157 return nfserr_not_only_op;
1158 return nfs_ok;
1159 }
1160
1161 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1162 {
1163 return &nfsd4_ops[op->opnum];
1164 }
1165
1166 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1167 {
1168 return OPDESC(op)->op_flags & OP_CACHEME;
1169 }
1170
1171 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1172 {
1173 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1174 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1175 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1176 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1177 struct nfsd4_operation *thisd;
1178 struct nfsd4_operation *nextd;
1179
1180 thisd = OPDESC(this);
1181 /*
1182 * Most ops check wronsec on our own; only the putfh-like ops
1183 * have special rules.
1184 */
1185 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1186 return false;
1187 /*
1188 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1189 * put-filehandle operation if we're not going to use the
1190 * result:
1191 */
1192 if (argp->opcnt == resp->opcnt)
1193 return false;
1194 if (next->opnum == OP_ILLEGAL)
1195 return false;
1196 nextd = OPDESC(next);
1197 /*
1198 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1199 * errors themselves as necessary; others should check for them
1200 * now:
1201 */
1202 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1203 }
1204
1205 /*
1206 * COMPOUND call.
1207 */
1208 static __be32
1209 nfsd4_proc_compound(struct svc_rqst *rqstp,
1210 struct nfsd4_compoundargs *args,
1211 struct nfsd4_compoundres *resp)
1212 {
1213 struct nfsd4_op *op;
1214 struct nfsd4_operation *opdesc;
1215 struct nfsd4_compound_state *cstate = &resp->cstate;
1216 int slack_bytes;
1217 u32 plen = 0;
1218 __be32 status;
1219
1220 resp->xbuf = &rqstp->rq_res;
1221 resp->p = rqstp->rq_res.head[0].iov_base +
1222 rqstp->rq_res.head[0].iov_len;
1223 resp->tagp = resp->p;
1224 /* reserve space for: taglen, tag, and opcnt */
1225 resp->p += 2 + XDR_QUADLEN(args->taglen);
1226 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1227 resp->taglen = args->taglen;
1228 resp->tag = args->tag;
1229 resp->opcnt = 0;
1230 resp->rqstp = rqstp;
1231 resp->cstate.minorversion = args->minorversion;
1232 resp->cstate.replay_owner = NULL;
1233 resp->cstate.session = NULL;
1234 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1235 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1236 /*
1237 * Don't use the deferral mechanism for NFSv4; compounds make it
1238 * too hard to avoid non-idempotency problems.
1239 */
1240 rqstp->rq_usedeferral = 0;
1241
1242 /*
1243 * According to RFC3010, this takes precedence over all other errors.
1244 */
1245 status = nfserr_minor_vers_mismatch;
1246 if (args->minorversion > nfsd_supported_minorversion)
1247 goto out;
1248
1249 status = nfs41_check_op_ordering(args);
1250 if (status) {
1251 op = &args->ops[0];
1252 op->status = status;
1253 goto encode_op;
1254 }
1255
1256 while (!status && resp->opcnt < args->opcnt) {
1257 op = &args->ops[resp->opcnt++];
1258
1259 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1260 resp->opcnt, args->opcnt, op->opnum,
1261 nfsd4_op_name(op->opnum));
1262 /*
1263 * The XDR decode routines may have pre-set op->status;
1264 * for example, if there is a miscellaneous XDR error
1265 * it will be set to nfserr_bad_xdr.
1266 */
1267 if (op->status) {
1268 if (op->opnum == OP_OPEN)
1269 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1270 goto encode_op;
1271 }
1272
1273 /* We must be able to encode a successful response to
1274 * this operation, with enough room left over to encode a
1275 * failed response to the next operation. If we don't
1276 * have enough room, fail with ERR_RESOURCE.
1277 */
1278 slack_bytes = (char *)resp->end - (char *)resp->p;
1279 if (slack_bytes < COMPOUND_SLACK_SPACE
1280 + COMPOUND_ERR_SLACK_SPACE) {
1281 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1282 op->status = nfserr_resource;
1283 goto encode_op;
1284 }
1285
1286 opdesc = OPDESC(op);
1287
1288 if (!cstate->current_fh.fh_dentry) {
1289 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1290 op->status = nfserr_nofilehandle;
1291 goto encode_op;
1292 }
1293 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1294 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1295 op->status = nfserr_moved;
1296 goto encode_op;
1297 }
1298
1299 /* If op is non-idempotent */
1300 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1301 plen = opdesc->op_rsize_bop(rqstp, op);
1302 /*
1303 * If there's still another operation, make sure
1304 * we'll have space to at least encode an error:
1305 */
1306 if (resp->opcnt < args->opcnt)
1307 plen += COMPOUND_ERR_SLACK_SPACE;
1308 op->status = nfsd4_check_resp_size(resp, plen);
1309 }
1310
1311 if (op->status)
1312 goto encode_op;
1313
1314 if (opdesc->op_get_currentstateid)
1315 opdesc->op_get_currentstateid(cstate, &op->u);
1316 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1317
1318 if (!op->status) {
1319 if (opdesc->op_set_currentstateid)
1320 opdesc->op_set_currentstateid(cstate, &op->u);
1321
1322 if (opdesc->op_flags & OP_CLEAR_STATEID)
1323 clear_current_stateid(cstate);
1324
1325 if (need_wrongsec_check(rqstp))
1326 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1327 }
1328
1329 encode_op:
1330 /* Only from SEQUENCE */
1331 if (resp->cstate.status == nfserr_replay_cache) {
1332 dprintk("%s NFS4.1 replay from cache\n", __func__);
1333 status = op->status;
1334 goto out;
1335 }
1336 if (op->status == nfserr_replay_me) {
1337 op->replay = &cstate->replay_owner->so_replay;
1338 nfsd4_encode_replay(resp, op);
1339 status = op->status = op->replay->rp_status;
1340 } else {
1341 nfsd4_encode_operation(resp, op);
1342 status = op->status;
1343 }
1344
1345 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1346 args->ops, args->opcnt, resp->opcnt, op->opnum,
1347 be32_to_cpu(status));
1348
1349 if (cstate->replay_owner) {
1350 nfs4_unlock_state();
1351 cstate->replay_owner = NULL;
1352 }
1353 /* XXX Ugh, we need to get rid of this kind of special case: */
1354 if (op->opnum == OP_READ && op->u.read.rd_filp)
1355 fput(op->u.read.rd_filp);
1356
1357 nfsd4_increment_op_stats(op->opnum);
1358 }
1359
1360 resp->cstate.status = status;
1361 fh_put(&resp->cstate.current_fh);
1362 fh_put(&resp->cstate.save_fh);
1363 BUG_ON(resp->cstate.replay_owner);
1364 out:
1365 /* Reset deferral mechanism for RPC deferrals */
1366 rqstp->rq_usedeferral = 1;
1367 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1368 return status;
1369 }
1370
1371 #define op_encode_hdr_size (2)
1372 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1373 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1374 #define op_encode_change_info_maxsz (5)
1375 #define nfs4_fattr_bitmap_maxsz (4)
1376
1377 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1378 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1379
1380 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1381
1382 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1383 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1384 op_encode_ace_maxsz)
1385
1386 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1387
1388 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1389 {
1390 return (op_encode_hdr_size) * sizeof(__be32);
1391 }
1392
1393 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1394 {
1395 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1396 }
1397
1398 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1399 {
1400 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1401 }
1402
1403 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1404 {
1405 return (op_encode_hdr_size + op_encode_change_info_maxsz
1406 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1407 }
1408
1409 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1410 {
1411 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1412 * sizeof(__be32);
1413 }
1414
1415 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1416 {
1417 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1418 * sizeof(__be32);
1419 }
1420
1421 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1422 {
1423 return (op_encode_hdr_size + op_encode_stateid_maxsz
1424 + op_encode_change_info_maxsz + 1
1425 + nfs4_fattr_bitmap_maxsz
1426 + op_encode_delegation_maxsz) * sizeof(__be32);
1427 }
1428
1429 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1430 {
1431 u32 maxcount = 0, rlen = 0;
1432
1433 maxcount = svc_max_payload(rqstp);
1434 rlen = op->u.read.rd_length;
1435
1436 if (rlen > maxcount)
1437 rlen = maxcount;
1438
1439 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1440 }
1441
1442 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1443 {
1444 u32 rlen = op->u.readdir.rd_maxcount;
1445
1446 if (rlen > PAGE_SIZE)
1447 rlen = PAGE_SIZE;
1448
1449 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1450 * sizeof(__be32) + rlen;
1451 }
1452
1453 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1454 {
1455 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1456 * sizeof(__be32);
1457 }
1458
1459 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1460 {
1461 return (op_encode_hdr_size + op_encode_change_info_maxsz
1462 + op_encode_change_info_maxsz) * sizeof(__be32);
1463 }
1464
1465 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1466 {
1467 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1468 }
1469
1470 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1471 {
1472 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1473 sizeof(__be32);
1474 }
1475
1476 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1477 {
1478 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1479 }
1480
1481 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1482 {
1483 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1484 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1485 2 + /*eir_server_owner.so_minor_id */\
1486 /* eir_server_owner.so_major_id<> */\
1487 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1488 /* eir_server_scope<> */\
1489 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1490 1 + /* eir_server_impl_id array length */\
1491 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1492 }
1493
1494 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1495 {
1496 return (op_encode_hdr_size + \
1497 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1498 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1499 }
1500
1501 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1502 {
1503 return (op_encode_hdr_size + \
1504 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1505 2 + /* csr_sequence, csr_flags */\
1506 op_encode_channel_attrs_maxsz + \
1507 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1508 }
1509
1510 static struct nfsd4_operation nfsd4_ops[] = {
1511 [OP_ACCESS] = {
1512 .op_func = (nfsd4op_func)nfsd4_access,
1513 .op_name = "OP_ACCESS",
1514 },
1515 [OP_CLOSE] = {
1516 .op_func = (nfsd4op_func)nfsd4_close,
1517 .op_flags = OP_MODIFIES_SOMETHING,
1518 .op_name = "OP_CLOSE",
1519 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1520 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1521 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1522 },
1523 [OP_COMMIT] = {
1524 .op_func = (nfsd4op_func)nfsd4_commit,
1525 .op_flags = OP_MODIFIES_SOMETHING,
1526 .op_name = "OP_COMMIT",
1527 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1528 },
1529 [OP_CREATE] = {
1530 .op_func = (nfsd4op_func)nfsd4_create,
1531 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1532 .op_name = "OP_CREATE",
1533 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1534 },
1535 [OP_DELEGRETURN] = {
1536 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1537 .op_flags = OP_MODIFIES_SOMETHING,
1538 .op_name = "OP_DELEGRETURN",
1539 .op_rsize_bop = nfsd4_only_status_rsize,
1540 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1541 },
1542 [OP_GETATTR] = {
1543 .op_func = (nfsd4op_func)nfsd4_getattr,
1544 .op_flags = ALLOWED_ON_ABSENT_FS,
1545 .op_name = "OP_GETATTR",
1546 },
1547 [OP_GETFH] = {
1548 .op_func = (nfsd4op_func)nfsd4_getfh,
1549 .op_name = "OP_GETFH",
1550 },
1551 [OP_LINK] = {
1552 .op_func = (nfsd4op_func)nfsd4_link,
1553 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1554 | OP_CACHEME,
1555 .op_name = "OP_LINK",
1556 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1557 },
1558 [OP_LOCK] = {
1559 .op_func = (nfsd4op_func)nfsd4_lock,
1560 .op_flags = OP_MODIFIES_SOMETHING,
1561 .op_name = "OP_LOCK",
1562 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1563 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1564 },
1565 [OP_LOCKT] = {
1566 .op_func = (nfsd4op_func)nfsd4_lockt,
1567 .op_name = "OP_LOCKT",
1568 },
1569 [OP_LOCKU] = {
1570 .op_func = (nfsd4op_func)nfsd4_locku,
1571 .op_flags = OP_MODIFIES_SOMETHING,
1572 .op_name = "OP_LOCKU",
1573 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1574 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1575 },
1576 [OP_LOOKUP] = {
1577 .op_func = (nfsd4op_func)nfsd4_lookup,
1578 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1579 .op_name = "OP_LOOKUP",
1580 },
1581 [OP_LOOKUPP] = {
1582 .op_func = (nfsd4op_func)nfsd4_lookupp,
1583 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1584 .op_name = "OP_LOOKUPP",
1585 },
1586 [OP_NVERIFY] = {
1587 .op_func = (nfsd4op_func)nfsd4_nverify,
1588 .op_name = "OP_NVERIFY",
1589 },
1590 [OP_OPEN] = {
1591 .op_func = (nfsd4op_func)nfsd4_open,
1592 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1593 .op_name = "OP_OPEN",
1594 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1595 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1596 },
1597 [OP_OPEN_CONFIRM] = {
1598 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1599 .op_flags = OP_MODIFIES_SOMETHING,
1600 .op_name = "OP_OPEN_CONFIRM",
1601 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1602 },
1603 [OP_OPEN_DOWNGRADE] = {
1604 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1605 .op_flags = OP_MODIFIES_SOMETHING,
1606 .op_name = "OP_OPEN_DOWNGRADE",
1607 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1608 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1609 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1610 },
1611 [OP_PUTFH] = {
1612 .op_func = (nfsd4op_func)nfsd4_putfh,
1613 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1614 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1615 | OP_CLEAR_STATEID,
1616 .op_name = "OP_PUTFH",
1617 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1618 },
1619 [OP_PUTPUBFH] = {
1620 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1621 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1622 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1623 | OP_CLEAR_STATEID,
1624 .op_name = "OP_PUTPUBFH",
1625 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1626 },
1627 [OP_PUTROOTFH] = {
1628 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1629 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1630 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1631 | OP_CLEAR_STATEID,
1632 .op_name = "OP_PUTROOTFH",
1633 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1634 },
1635 [OP_READ] = {
1636 .op_func = (nfsd4op_func)nfsd4_read,
1637 .op_flags = OP_MODIFIES_SOMETHING,
1638 .op_name = "OP_READ",
1639 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1640 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1641 },
1642 [OP_READDIR] = {
1643 .op_func = (nfsd4op_func)nfsd4_readdir,
1644 .op_flags = OP_MODIFIES_SOMETHING,
1645 .op_name = "OP_READDIR",
1646 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1647 },
1648 [OP_READLINK] = {
1649 .op_func = (nfsd4op_func)nfsd4_readlink,
1650 .op_name = "OP_READLINK",
1651 },
1652 [OP_REMOVE] = {
1653 .op_func = (nfsd4op_func)nfsd4_remove,
1654 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1655 .op_name = "OP_REMOVE",
1656 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1657 },
1658 [OP_RENAME] = {
1659 .op_func = (nfsd4op_func)nfsd4_rename,
1660 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1661 .op_name = "OP_RENAME",
1662 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1663 },
1664 [OP_RENEW] = {
1665 .op_func = (nfsd4op_func)nfsd4_renew,
1666 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1667 | OP_MODIFIES_SOMETHING,
1668 .op_name = "OP_RENEW",
1669 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1670
1671 },
1672 [OP_RESTOREFH] = {
1673 .op_func = (nfsd4op_func)nfsd4_restorefh,
1674 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1675 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1676 .op_name = "OP_RESTOREFH",
1677 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1678 },
1679 [OP_SAVEFH] = {
1680 .op_func = (nfsd4op_func)nfsd4_savefh,
1681 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1682 .op_name = "OP_SAVEFH",
1683 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1684 },
1685 [OP_SECINFO] = {
1686 .op_func = (nfsd4op_func)nfsd4_secinfo,
1687 .op_flags = OP_HANDLES_WRONGSEC,
1688 .op_name = "OP_SECINFO",
1689 },
1690 [OP_SETATTR] = {
1691 .op_func = (nfsd4op_func)nfsd4_setattr,
1692 .op_name = "OP_SETATTR",
1693 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1694 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1695 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1696 },
1697 [OP_SETCLIENTID] = {
1698 .op_func = (nfsd4op_func)nfsd4_setclientid,
1699 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1700 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1701 .op_name = "OP_SETCLIENTID",
1702 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1703 },
1704 [OP_SETCLIENTID_CONFIRM] = {
1705 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1706 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1707 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1708 .op_name = "OP_SETCLIENTID_CONFIRM",
1709 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1710 },
1711 [OP_VERIFY] = {
1712 .op_func = (nfsd4op_func)nfsd4_verify,
1713 .op_name = "OP_VERIFY",
1714 },
1715 [OP_WRITE] = {
1716 .op_func = (nfsd4op_func)nfsd4_write,
1717 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1718 .op_name = "OP_WRITE",
1719 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1720 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1721 },
1722 [OP_RELEASE_LOCKOWNER] = {
1723 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1724 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1725 | OP_MODIFIES_SOMETHING,
1726 .op_name = "OP_RELEASE_LOCKOWNER",
1727 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1728 },
1729
1730 /* NFSv4.1 operations */
1731 [OP_EXCHANGE_ID] = {
1732 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1733 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1734 | OP_MODIFIES_SOMETHING,
1735 .op_name = "OP_EXCHANGE_ID",
1736 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1737 },
1738 [OP_BACKCHANNEL_CTL] = {
1739 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1740 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1741 .op_name = "OP_BACKCHANNEL_CTL",
1742 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1743 },
1744 [OP_BIND_CONN_TO_SESSION] = {
1745 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1746 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1747 | OP_MODIFIES_SOMETHING,
1748 .op_name = "OP_BIND_CONN_TO_SESSION",
1749 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1750 },
1751 [OP_CREATE_SESSION] = {
1752 .op_func = (nfsd4op_func)nfsd4_create_session,
1753 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1754 | OP_MODIFIES_SOMETHING,
1755 .op_name = "OP_CREATE_SESSION",
1756 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1757 },
1758 [OP_DESTROY_SESSION] = {
1759 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1760 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1761 | OP_MODIFIES_SOMETHING,
1762 .op_name = "OP_DESTROY_SESSION",
1763 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1764 },
1765 [OP_SEQUENCE] = {
1766 .op_func = (nfsd4op_func)nfsd4_sequence,
1767 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1768 .op_name = "OP_SEQUENCE",
1769 },
1770 [OP_DESTROY_CLIENTID] = {
1771 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1772 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1773 | OP_MODIFIES_SOMETHING,
1774 .op_name = "OP_DESTROY_CLIENTID",
1775 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1776 },
1777 [OP_RECLAIM_COMPLETE] = {
1778 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1779 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1780 .op_name = "OP_RECLAIM_COMPLETE",
1781 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1782 },
1783 [OP_SECINFO_NO_NAME] = {
1784 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1785 .op_flags = OP_HANDLES_WRONGSEC,
1786 .op_name = "OP_SECINFO_NO_NAME",
1787 },
1788 [OP_TEST_STATEID] = {
1789 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1790 .op_flags = ALLOWED_WITHOUT_FH,
1791 .op_name = "OP_TEST_STATEID",
1792 },
1793 [OP_FREE_STATEID] = {
1794 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1795 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1796 .op_name = "OP_FREE_STATEID",
1797 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1798 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1799 },
1800 };
1801
1802 #ifdef NFSD_DEBUG
1803 static const char *nfsd4_op_name(unsigned opnum)
1804 {
1805 if (opnum < ARRAY_SIZE(nfsd4_ops))
1806 return nfsd4_ops[opnum].op_name;
1807 return "unknown_operation";
1808 }
1809 #endif
1810
1811 #define nfsd4_voidres nfsd4_voidargs
1812 struct nfsd4_voidargs { int dummy; };
1813
1814 static struct svc_procedure nfsd_procedures4[2] = {
1815 [NFSPROC4_NULL] = {
1816 .pc_func = (svc_procfunc) nfsd4_proc_null,
1817 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1818 .pc_argsize = sizeof(struct nfsd4_voidargs),
1819 .pc_ressize = sizeof(struct nfsd4_voidres),
1820 .pc_cachetype = RC_NOCACHE,
1821 .pc_xdrressize = 1,
1822 },
1823 [NFSPROC4_COMPOUND] = {
1824 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1825 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1826 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1827 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1828 .pc_ressize = sizeof(struct nfsd4_compoundres),
1829 .pc_release = nfsd4_release_compoundargs,
1830 .pc_cachetype = RC_NOCACHE,
1831 .pc_xdrressize = NFSD_BUFSIZE/4,
1832 },
1833 };
1834
1835 struct svc_version nfsd_version4 = {
1836 .vs_vers = 4,
1837 .vs_nproc = 2,
1838 .vs_proc = nfsd_procedures4,
1839 .vs_dispatch = nfsd_dispatch,
1840 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1841 };
1842
1843 /*
1844 * Local variables:
1845 * c-basic-offset: 8
1846 * End:
1847 */
kernel source for telekom puls (alcatel/mediatek)