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Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux/fpc-iii.git] / fs / nfsd / nfs4proc.c
blob82189b208af31700418217e62d8339f13dce6565
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 #include "acl.h"
45
46 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
47 #include <linux/security.h>
48
49 static inline void
50 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
51 {
52 struct inode *inode = resfh->fh_dentry->d_inode;
53 int status;
54
55 mutex_lock(&inode->i_mutex);
56 status = security_inode_setsecctx(resfh->fh_dentry,
57 label->data, label->len);
58 mutex_unlock(&inode->i_mutex);
59
60 if (status)
61 /*
62 * XXX: We should really fail the whole open, but we may
63 * already have created a new file, so it may be too
64 * late. For now this seems the least of evils:
65 */
66 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
67
68 return;
69 }
70 #else
71 static inline void
72 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
73 { }
74 #endif
75
76 #define NFSDDBG_FACILITY NFSDDBG_PROC
77
78 static u32 nfsd_attrmask[] = {
79 NFSD_WRITEABLE_ATTRS_WORD0,
80 NFSD_WRITEABLE_ATTRS_WORD1,
81 NFSD_WRITEABLE_ATTRS_WORD2
82 };
83
84 static u32 nfsd41_ex_attrmask[] = {
85 NFSD_SUPPATTR_EXCLCREAT_WORD0,
86 NFSD_SUPPATTR_EXCLCREAT_WORD1,
87 NFSD_SUPPATTR_EXCLCREAT_WORD2
88 };
89
90 static __be32
91 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
92 u32 *bmval, u32 *writable)
93 {
94 struct dentry *dentry = cstate->current_fh.fh_dentry;
95
96 /*
97 * Check about attributes are supported by the NFSv4 server or not.
98 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
99 */
100 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
101 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
102 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
103 return nfserr_attrnotsupp;
104
105 /*
106 * Check FATTR4_WORD0_ACL can be supported
107 * in current environment or not.
108 */
109 if (bmval[0] & FATTR4_WORD0_ACL) {
110 if (!IS_POSIXACL(dentry->d_inode))
111 return nfserr_attrnotsupp;
112 }
113
114 /*
115 * According to spec, read-only attributes return ERR_INVAL.
116 */
117 if (writable) {
118 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
119 (bmval[2] & ~writable[2]))
120 return nfserr_inval;
121 }
122
123 return nfs_ok;
124 }
125
126 static __be32
127 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
128 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
129 {
130 __be32 status = nfs_ok;
131
132 if (open->op_create == NFS4_OPEN_CREATE) {
133 if (open->op_createmode == NFS4_CREATE_UNCHECKED
134 || open->op_createmode == NFS4_CREATE_GUARDED)
135 status = check_attr_support(rqstp, cstate,
136 open->op_bmval, nfsd_attrmask);
137 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
138 status = check_attr_support(rqstp, cstate,
139 open->op_bmval, nfsd41_ex_attrmask);
140 }
141
142 return status;
143 }
144
145 static int
146 is_create_with_attrs(struct nfsd4_open *open)
147 {
148 return open->op_create == NFS4_OPEN_CREATE
149 && (open->op_createmode == NFS4_CREATE_UNCHECKED
150 || open->op_createmode == NFS4_CREATE_GUARDED
151 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
152 }
153
154 /*
155 * if error occurs when setting the acl, just clear the acl bit
156 * in the returned attr bitmap.
157 */
158 static void
159 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
160 struct nfs4_acl *acl, u32 *bmval)
161 {
162 __be32 status;
163
164 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
165 if (status)
166 /*
167 * We should probably fail the whole open at this point,
168 * but we've already created the file, so it's too late;
169 * So this seems the least of evils:
170 */
171 bmval[0] &= ~FATTR4_WORD0_ACL;
172 }
173
174 static inline void
175 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
176 {
177 fh_put(dst);
178 dget(src->fh_dentry);
179 if (src->fh_export)
180 cache_get(&src->fh_export->h);
181 *dst = *src;
182 }
183
184 static __be32
185 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
186 {
187 __be32 status;
188
189 if (open->op_truncate &&
190 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
191 return nfserr_inval;
192
193 accmode |= NFSD_MAY_READ_IF_EXEC;
194
195 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
196 accmode |= NFSD_MAY_READ;
197 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
198 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
199 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
200 accmode |= NFSD_MAY_WRITE;
201
202 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
203
204 return status;
205 }
206
207 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
208 {
209 umode_t mode = fh->fh_dentry->d_inode->i_mode;
210
211 if (S_ISREG(mode))
212 return nfs_ok;
213 if (S_ISDIR(mode))
214 return nfserr_isdir;
215 /*
216 * Using err_symlink as our catch-all case may look odd; but
217 * there's no other obvious error for this case in 4.0, and we
218 * happen to know that it will cause the linux v4 client to do
219 * the right thing on attempts to open something other than a
220 * regular file.
221 */
222 return nfserr_symlink;
223 }
224
225 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
226 {
227 if (nfsd4_has_session(cstate))
228 return;
229 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
230 &resfh->fh_handle);
231 }
232
233 static __be32
234 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
235 {
236 struct svc_fh *current_fh = &cstate->current_fh;
237 int accmode;
238 __be32 status;
239
240 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
241 if (!*resfh)
242 return nfserr_jukebox;
243 fh_init(*resfh, NFS4_FHSIZE);
244 open->op_truncate = 0;
245
246 if (open->op_create) {
247 /* FIXME: check session persistence and pnfs flags.
248 * The nfsv4.1 spec requires the following semantics:
249 *
250 * Persistent | pNFS | Server REQUIRED | Client Allowed
251 * Reply Cache | server | |
252 * -------------+--------+-----------------+--------------------
253 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
254 * | | | (SHOULD)
255 * | | and EXCLUSIVE4 | or EXCLUSIVE4
256 * | | | (SHOULD NOT)
257 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
258 * yes | no | GUARDED4 | GUARDED4
259 * yes | yes | GUARDED4 | GUARDED4
260 */
261
262 /*
263 * Note: create modes (UNCHECKED,GUARDED...) are the same
264 * in NFSv4 as in v3 except EXCLUSIVE4_1.
265 */
266 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
267 open->op_fname.len, &open->op_iattr,
268 *resfh, open->op_createmode,
269 (u32 *)open->op_verf.data,
270 &open->op_truncate, &open->op_created);
271
272 if (!status && open->op_label.len)
273 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
274
275 /*
276 * Following rfc 3530 14.2.16, use the returned bitmask
277 * to indicate which attributes we used to store the
278 * verifier:
279 */
280 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
281 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
282 FATTR4_WORD1_TIME_MODIFY);
283 } else
284 /*
285 * Note this may exit with the parent still locked.
286 * We will hold the lock until nfsd4_open's final
287 * lookup, to prevent renames or unlinks until we've had
288 * a chance to an acquire a delegation if appropriate.
289 */
290 status = nfsd_lookup(rqstp, current_fh,
291 open->op_fname.data, open->op_fname.len, *resfh);
292 if (status)
293 goto out;
294 status = nfsd_check_obj_isreg(*resfh);
295 if (status)
296 goto out;
297
298 if (is_create_with_attrs(open) && open->op_acl != NULL)
299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
300
301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
302 accmode = NFSD_MAY_NOP;
303 if (open->op_created ||
304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
305 accmode |= NFSD_MAY_OWNER_OVERRIDE;
306 status = do_open_permission(rqstp, *resfh, open, accmode);
307 set_change_info(&open->op_cinfo, current_fh);
308 out:
309 return status;
310 }
311
312 static __be32
313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
314 {
315 struct svc_fh *current_fh = &cstate->current_fh;
316 __be32 status;
317 int accmode = 0;
318
319 /* We don't know the target directory, and therefore can not
320 * set the change info
321 */
322
323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
324
325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
326
327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
328 (open->op_iattr.ia_size == 0);
329 /*
330 * In the delegation case, the client is telling us about an
331 * open that it *already* performed locally, some time ago. We
332 * should let it succeed now if possible.
333 *
334 * In the case of a CLAIM_FH open, on the other hand, the client
335 * may be counting on us to enforce permissions (the Linux 4.1
336 * client uses this for normal opens, for example).
337 */
338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
339 accmode = NFSD_MAY_OWNER_OVERRIDE;
340
341 status = do_open_permission(rqstp, current_fh, open, accmode);
342
343 return status;
344 }
345
346 static void
347 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
348 {
349 struct nfsd4_sessionid *sid =
350 (struct nfsd4_sessionid *)session->se_sessionid.data;
351
352 clid->cl_boot = sid->clientid.cl_boot;
353 clid->cl_id = sid->clientid.cl_id;
354 }
355
356 static __be32
357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
358 struct nfsd4_open *open)
359 {
360 __be32 status;
361 struct svc_fh *resfh = NULL;
362 struct nfsd4_compoundres *resp;
363 struct net *net = SVC_NET(rqstp);
364 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
365
366 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
367 (int)open->op_fname.len, open->op_fname.data,
368 open->op_openowner);
369
370 /* This check required by spec. */
371 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
372 return nfserr_inval;
373
374 open->op_created = 0;
375 /*
376 * RFC5661 18.51.3
377 * Before RECLAIM_COMPLETE done, server should deny new lock
378 */
379 if (nfsd4_has_session(cstate) &&
380 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
381 &cstate->session->se_client->cl_flags) &&
382 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
383 return nfserr_grace;
384
385 if (nfsd4_has_session(cstate))
386 copy_clientid(&open->op_clientid, cstate->session);
387
388 nfs4_lock_state();
389
390 /* check seqid for replay. set nfs4_owner */
391 resp = rqstp->rq_resp;
392 status = nfsd4_process_open1(&resp->cstate, open, nn);
393 if (status == nfserr_replay_me) {
394 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
395 fh_put(&cstate->current_fh);
396 fh_copy_shallow(&cstate->current_fh.fh_handle,
397 &rp->rp_openfh);
398 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
399 if (status)
400 dprintk("nfsd4_open: replay failed"
401 " restoring previous filehandle\n");
402 else
403 status = nfserr_replay_me;
404 }
405 if (status)
406 goto out;
407 if (open->op_xdr_error) {
408 status = open->op_xdr_error;
409 goto out;
410 }
411
412 status = nfsd4_check_open_attributes(rqstp, cstate, open);
413 if (status)
414 goto out;
415
416 /* Openowner is now set, so sequence id will get bumped. Now we need
417 * these checks before we do any creates: */
418 status = nfserr_grace;
419 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
420 goto out;
421 status = nfserr_no_grace;
422 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
423 goto out;
424
425 switch (open->op_claim_type) {
426 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
427 case NFS4_OPEN_CLAIM_NULL:
428 status = do_open_lookup(rqstp, cstate, open, &resfh);
429 if (status)
430 goto out;
431 break;
432 case NFS4_OPEN_CLAIM_PREVIOUS:
433 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
434 status = nfs4_check_open_reclaim(&open->op_clientid,
435 cstate->minorversion,
436 nn);
437 if (status)
438 goto out;
439 case NFS4_OPEN_CLAIM_FH:
440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
441 status = do_open_fhandle(rqstp, cstate, open);
442 if (status)
443 goto out;
444 resfh = &cstate->current_fh;
445 break;
446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
447 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
448 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
449 dprintk("NFSD: unsupported OPEN claim type %d\n",
450 open->op_claim_type);
451 status = nfserr_notsupp;
452 goto out;
453 default:
454 dprintk("NFSD: Invalid OPEN claim type %d\n",
455 open->op_claim_type);
456 status = nfserr_inval;
457 goto out;
458 }
459 /*
460 * nfsd4_process_open2() does the actual opening of the file. If
461 * successful, it (1) truncates the file if open->op_truncate was
462 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
463 */
464 status = nfsd4_process_open2(rqstp, resfh, open);
465 WARN_ON(status && open->op_created);
466 out:
467 if (resfh && resfh != &cstate->current_fh) {
468 fh_dup2(&cstate->current_fh, resfh);
469 fh_put(resfh);
470 kfree(resfh);
471 }
472 nfsd4_cleanup_open_state(open, status);
473 if (open->op_openowner && !nfsd4_has_session(cstate))
474 cstate->replay_owner = &open->op_openowner->oo_owner;
475 nfsd4_bump_seqid(cstate, status);
476 if (!cstate->replay_owner)
477 nfs4_unlock_state();
478 return status;
479 }
480
481 /*
482 * OPEN is the only seqid-mutating operation whose decoding can fail
483 * with a seqid-mutating error (specifically, decoding of user names in
484 * the attributes). Therefore we have to do some processing to look up
485 * the stateowner so that we can bump the seqid.
486 */
487 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
488 {
489 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
490
491 if (!seqid_mutating_err(ntohl(op->status)))
492 return op->status;
493 if (nfsd4_has_session(cstate))
494 return op->status;
495 open->op_xdr_error = op->status;
496 return nfsd4_open(rqstp, cstate, open);
497 }
498
499 /*
500 * filehandle-manipulating ops.
501 */
502 static __be32
503 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504 struct svc_fh **getfh)
505 {
506 if (!cstate->current_fh.fh_dentry)
507 return nfserr_nofilehandle;
508
509 *getfh = &cstate->current_fh;
510 return nfs_ok;
511 }
512
513 static __be32
514 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
515 struct nfsd4_putfh *putfh)
516 {
517 fh_put(&cstate->current_fh);
518 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
519 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
520 putfh->pf_fhlen);
521 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
522 }
523
524 static __be32
525 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
526 void *arg)
527 {
528 __be32 status;
529
530 fh_put(&cstate->current_fh);
531 status = exp_pseudoroot(rqstp, &cstate->current_fh);
532 return status;
533 }
534
535 static __be32
536 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
537 void *arg)
538 {
539 if (!cstate->save_fh.fh_dentry)
540 return nfserr_restorefh;
541
542 fh_dup2(&cstate->current_fh, &cstate->save_fh);
543 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
544 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
545 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
546 }
547 return nfs_ok;
548 }
549
550 static __be32
551 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
552 void *arg)
553 {
554 if (!cstate->current_fh.fh_dentry)
555 return nfserr_nofilehandle;
556
557 fh_dup2(&cstate->save_fh, &cstate->current_fh);
558 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
559 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
560 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
561 }
562 return nfs_ok;
563 }
564
565 /*
566 * misc nfsv4 ops
567 */
568 static __be32
569 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
570 struct nfsd4_access *access)
571 {
572 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
573 return nfserr_inval;
574
575 access->ac_resp_access = access->ac_req_access;
576 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
577 &access->ac_supported);
578 }
579
580 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
581 {
582 __be32 verf[2];
583 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
584
585 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
586 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
587 memcpy(verifier->data, verf, sizeof(verifier->data));
588 }
589
590 static __be32
591 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
592 struct nfsd4_commit *commit)
593 {
594 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
595 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
596 commit->co_count);
597 }
598
599 static __be32
600 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
601 struct nfsd4_create *create)
602 {
603 struct svc_fh resfh;
604 __be32 status;
605 dev_t rdev;
606
607 fh_init(&resfh, NFS4_FHSIZE);
608
609 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
610 NFSD_MAY_CREATE);
611 if (status)
612 return status;
613
614 status = check_attr_support(rqstp, cstate, create->cr_bmval,
615 nfsd_attrmask);
616 if (status)
617 return status;
618
619 switch (create->cr_type) {
620 case NF4LNK:
621 /* ugh! we have to null-terminate the linktext, or
622 * vfs_symlink() will choke. it is always safe to
623 * null-terminate by brute force, since at worst we
624 * will overwrite the first byte of the create namelen
625 * in the XDR buffer, which has already been extracted
626 * during XDR decode.
627 */
628 create->cr_linkname[create->cr_linklen] = 0;
629
630 status = nfsd_symlink(rqstp, &cstate->current_fh,
631 create->cr_name, create->cr_namelen,
632 create->cr_linkname, create->cr_linklen,
633 &resfh, &create->cr_iattr);
634 break;
635
636 case NF4BLK:
637 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
638 if (MAJOR(rdev) != create->cr_specdata1 ||
639 MINOR(rdev) != create->cr_specdata2)
640 return nfserr_inval;
641 status = nfsd_create(rqstp, &cstate->current_fh,
642 create->cr_name, create->cr_namelen,
643 &create->cr_iattr, S_IFBLK, rdev, &resfh);
644 break;
645
646 case NF4CHR:
647 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
648 if (MAJOR(rdev) != create->cr_specdata1 ||
649 MINOR(rdev) != create->cr_specdata2)
650 return nfserr_inval;
651 status = nfsd_create(rqstp, &cstate->current_fh,
652 create->cr_name, create->cr_namelen,
653 &create->cr_iattr,S_IFCHR, rdev, &resfh);
654 break;
655
656 case NF4SOCK:
657 status = nfsd_create(rqstp, &cstate->current_fh,
658 create->cr_name, create->cr_namelen,
659 &create->cr_iattr, S_IFSOCK, 0, &resfh);
660 break;
661
662 case NF4FIFO:
663 status = nfsd_create(rqstp, &cstate->current_fh,
664 create->cr_name, create->cr_namelen,
665 &create->cr_iattr, S_IFIFO, 0, &resfh);
666 break;
667
668 case NF4DIR:
669 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
670 status = nfsd_create(rqstp, &cstate->current_fh,
671 create->cr_name, create->cr_namelen,
672 &create->cr_iattr, S_IFDIR, 0, &resfh);
673 break;
674
675 default:
676 status = nfserr_badtype;
677 }
678
679 if (status)
680 goto out;
681
682 if (create->cr_label.len)
683 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
684
685 if (create->cr_acl != NULL)
686 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
687 create->cr_bmval);
688
689 fh_unlock(&cstate->current_fh);
690 set_change_info(&create->cr_cinfo, &cstate->current_fh);
691 fh_dup2(&cstate->current_fh, &resfh);
692 out:
693 fh_put(&resfh);
694 return status;
695 }
696
697 static __be32
698 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
699 struct nfsd4_getattr *getattr)
700 {
701 __be32 status;
702
703 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
704 if (status)
705 return status;
706
707 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
708 return nfserr_inval;
709
710 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
711 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
712 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
713
714 getattr->ga_fhp = &cstate->current_fh;
715 return nfs_ok;
716 }
717
718 static __be32
719 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
720 struct nfsd4_link *link)
721 {
722 __be32 status = nfserr_nofilehandle;
723
724 if (!cstate->save_fh.fh_dentry)
725 return status;
726 status = nfsd_link(rqstp, &cstate->current_fh,
727 link->li_name, link->li_namelen, &cstate->save_fh);
728 if (!status)
729 set_change_info(&link->li_cinfo, &cstate->current_fh);
730 return status;
731 }
732
733 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
734 {
735 struct svc_fh tmp_fh;
736 __be32 ret;
737
738 fh_init(&tmp_fh, NFS4_FHSIZE);
739 ret = exp_pseudoroot(rqstp, &tmp_fh);
740 if (ret)
741 return ret;
742 if (tmp_fh.fh_dentry == fh->fh_dentry) {
743 fh_put(&tmp_fh);
744 return nfserr_noent;
745 }
746 fh_put(&tmp_fh);
747 return nfsd_lookup(rqstp, fh, "..", 2, fh);
748 }
749
750 static __be32
751 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 void *arg)
753 {
754 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
755 }
756
757 static __be32
758 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
759 struct nfsd4_lookup *lookup)
760 {
761 return nfsd_lookup(rqstp, &cstate->current_fh,
762 lookup->lo_name, lookup->lo_len,
763 &cstate->current_fh);
764 }
765
766 static __be32
767 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
768 struct nfsd4_read *read)
769 {
770 __be32 status;
771
772 /* no need to check permission - this will be done in nfsd_read() */
773
774 read->rd_filp = NULL;
775 if (read->rd_offset >= OFFSET_MAX)
776 return nfserr_inval;
777
778 /*
779 * If we do a zero copy read, then a client will see read data
780 * that reflects the state of the file *after* performing the
781 * following compound.
782 *
783 * To ensure proper ordering, we therefore turn off zero copy if
784 * the client wants us to do more in this compound:
785 */
786 if (!nfsd4_last_compound_op(rqstp))
787 rqstp->rq_splice_ok = false;
788
789 nfs4_lock_state();
790 /* check stateid */
791 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
792 cstate, &read->rd_stateid,
793 RD_STATE, &read->rd_filp))) {
794 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
795 goto out;
796 }
797 if (read->rd_filp)
798 get_file(read->rd_filp);
799 status = nfs_ok;
800 out:
801 nfs4_unlock_state();
802 read->rd_rqstp = rqstp;
803 read->rd_fhp = &cstate->current_fh;
804 return status;
805 }
806
807 static __be32
808 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
809 struct nfsd4_readdir *readdir)
810 {
811 u64 cookie = readdir->rd_cookie;
812 static const nfs4_verifier zeroverf;
813
814 /* no need to check permission - this will be done in nfsd_readdir() */
815
816 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
817 return nfserr_inval;
818
819 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
820 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
821 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
822
823 if ((cookie == 1) || (cookie == 2) ||
824 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
825 return nfserr_bad_cookie;
826
827 readdir->rd_rqstp = rqstp;
828 readdir->rd_fhp = &cstate->current_fh;
829 return nfs_ok;
830 }
831
832 static __be32
833 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
834 struct nfsd4_readlink *readlink)
835 {
836 readlink->rl_rqstp = rqstp;
837 readlink->rl_fhp = &cstate->current_fh;
838 return nfs_ok;
839 }
840
841 static __be32
842 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
843 struct nfsd4_remove *remove)
844 {
845 __be32 status;
846
847 if (locks_in_grace(SVC_NET(rqstp)))
848 return nfserr_grace;
849 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
850 remove->rm_name, remove->rm_namelen);
851 if (!status) {
852 fh_unlock(&cstate->current_fh);
853 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
854 }
855 return status;
856 }
857
858 static __be32
859 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
860 struct nfsd4_rename *rename)
861 {
862 __be32 status = nfserr_nofilehandle;
863
864 if (!cstate->save_fh.fh_dentry)
865 return status;
866 if (locks_in_grace(SVC_NET(rqstp)) &&
867 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
868 return nfserr_grace;
869 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
870 rename->rn_snamelen, &cstate->current_fh,
871 rename->rn_tname, rename->rn_tnamelen);
872 if (status)
873 return status;
874 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
875 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
876 return nfs_ok;
877 }
878
879 static __be32
880 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
881 struct nfsd4_secinfo *secinfo)
882 {
883 struct svc_fh resfh;
884 struct svc_export *exp;
885 struct dentry *dentry;
886 __be32 err;
887
888 fh_init(&resfh, NFS4_FHSIZE);
889 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
890 if (err)
891 return err;
892 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
893 secinfo->si_name, secinfo->si_namelen,
894 &exp, &dentry);
895 if (err)
896 return err;
897 if (dentry->d_inode == NULL) {
898 exp_put(exp);
899 err = nfserr_noent;
900 } else
901 secinfo->si_exp = exp;
902 dput(dentry);
903 if (cstate->minorversion)
904 /* See rfc 5661 section 2.6.3.1.1.8 */
905 fh_put(&cstate->current_fh);
906 return err;
907 }
908
909 static __be32
910 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
911 struct nfsd4_secinfo_no_name *sin)
912 {
913 __be32 err;
914
915 switch (sin->sin_style) {
916 case NFS4_SECINFO_STYLE4_CURRENT_FH:
917 break;
918 case NFS4_SECINFO_STYLE4_PARENT:
919 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
920 if (err)
921 return err;
922 break;
923 default:
924 return nfserr_inval;
925 }
926 exp_get(cstate->current_fh.fh_export);
927 sin->sin_exp = cstate->current_fh.fh_export;
928 fh_put(&cstate->current_fh);
929 return nfs_ok;
930 }
931
932 static __be32
933 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
934 struct nfsd4_setattr *setattr)
935 {
936 __be32 status = nfs_ok;
937 int err;
938
939 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
940 nfs4_lock_state();
941 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
942 &setattr->sa_stateid, WR_STATE, NULL);
943 nfs4_unlock_state();
944 if (status) {
945 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
946 return status;
947 }
948 }
949 err = fh_want_write(&cstate->current_fh);
950 if (err)
951 return nfserrno(err);
952 status = nfs_ok;
953
954 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
955 nfsd_attrmask);
956 if (status)
957 goto out;
958
959 if (setattr->sa_acl != NULL)
960 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
961 setattr->sa_acl);
962 if (status)
963 goto out;
964 if (setattr->sa_label.len)
965 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
966 &setattr->sa_label);
967 if (status)
968 goto out;
969 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
970 0, (time_t)0);
971 out:
972 fh_drop_write(&cstate->current_fh);
973 return status;
974 }
975
976 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
977 {
978 int i = 1;
979 int buflen = write->wr_buflen;
980
981 vec[0].iov_base = write->wr_head.iov_base;
982 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
983 buflen -= vec[0].iov_len;
984
985 while (buflen) {
986 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
987 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
988 buflen -= vec[i].iov_len;
989 i++;
990 }
991 return i;
992 }
993
994 static __be32
995 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
996 struct nfsd4_write *write)
997 {
998 stateid_t *stateid = &write->wr_stateid;
999 struct file *filp = NULL;
1000 __be32 status = nfs_ok;
1001 unsigned long cnt;
1002 int nvecs;
1003
1004 /* no need to check permission - this will be done in nfsd_write() */
1005
1006 if (write->wr_offset >= OFFSET_MAX)
1007 return nfserr_inval;
1008
1009 nfs4_lock_state();
1010 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
1011 cstate, stateid, WR_STATE, &filp);
1012 if (status) {
1013 nfs4_unlock_state();
1014 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1015 return status;
1016 }
1017 if (filp)
1018 get_file(filp);
1019 nfs4_unlock_state();
1020
1021 cnt = write->wr_buflen;
1022 write->wr_how_written = write->wr_stable_how;
1023 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1024
1025 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1026 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1027
1028 status = nfsd_write(rqstp, &cstate->current_fh, filp,
1029 write->wr_offset, rqstp->rq_vec, nvecs,
1030 &cnt, &write->wr_how_written);
1031 if (filp)
1032 fput(filp);
1033
1034 write->wr_bytes_written = cnt;
1035
1036 return status;
1037 }
1038
1039 /* This routine never returns NFS_OK! If there are no other errors, it
1040 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1041 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1042 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1043 */
1044 static __be32
1045 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1046 struct nfsd4_verify *verify)
1047 {
1048 __be32 *buf, *p;
1049 int count;
1050 __be32 status;
1051
1052 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1053 if (status)
1054 return status;
1055
1056 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1057 if (status)
1058 return status;
1059
1060 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1061 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1062 return nfserr_inval;
1063 if (verify->ve_attrlen & 3)
1064 return nfserr_inval;
1065
1066 /* count in words:
1067 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1068 */
1069 count = 4 + (verify->ve_attrlen >> 2);
1070 buf = kmalloc(count << 2, GFP_KERNEL);
1071 if (!buf)
1072 return nfserr_jukebox;
1073
1074 p = buf;
1075 status = nfsd4_encode_fattr(&cstate->current_fh,
1076 cstate->current_fh.fh_export,
1077 cstate->current_fh.fh_dentry, &p,
1078 count, verify->ve_bmval,
1079 rqstp, 0);
1080 /*
1081 * If nfsd4_encode_fattr() ran out of space, assume that's because
1082 * the attributes are longer (hence different) than those given:
1083 */
1084 if (status == nfserr_resource)
1085 status = nfserr_not_same;
1086 if (status)
1087 goto out_kfree;
1088
1089 /* skip bitmap */
1090 p = buf + 1 + ntohl(buf[0]);
1091 status = nfserr_not_same;
1092 if (ntohl(*p++) != verify->ve_attrlen)
1093 goto out_kfree;
1094 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1095 status = nfserr_same;
1096
1097 out_kfree:
1098 kfree(buf);
1099 return status;
1100 }
1101
1102 static __be32
1103 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1104 struct nfsd4_verify *verify)
1105 {
1106 __be32 status;
1107
1108 status = _nfsd4_verify(rqstp, cstate, verify);
1109 return status == nfserr_not_same ? nfs_ok : status;
1110 }
1111
1112 static __be32
1113 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1114 struct nfsd4_verify *verify)
1115 {
1116 __be32 status;
1117
1118 status = _nfsd4_verify(rqstp, cstate, verify);
1119 return status == nfserr_same ? nfs_ok : status;
1120 }
1121
1122 /*
1123 * NULL call.
1124 */
1125 static __be32
1126 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1127 {
1128 return nfs_ok;
1129 }
1130
1131 static inline void nfsd4_increment_op_stats(u32 opnum)
1132 {
1133 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1134 nfsdstats.nfs4_opcount[opnum]++;
1135 }
1136
1137 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1138 void *);
1139 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1140 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1141 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1142
1143 enum nfsd4_op_flags {
1144 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1145 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1146 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1147 /* For rfc 5661 section 2.6.3.1.1: */
1148 OP_HANDLES_WRONGSEC = 1 << 3,
1149 OP_IS_PUTFH_LIKE = 1 << 4,
1150 /*
1151 * These are the ops whose result size we estimate before
1152 * encoding, to avoid performing an op then not being able to
1153 * respond or cache a response. This includes writes and setattrs
1154 * as well as the operations usually called "nonidempotent":
1155 */
1156 OP_MODIFIES_SOMETHING = 1 << 5,
1157 /*
1158 * Cache compounds containing these ops in the xid-based drc:
1159 * We use the DRC for compounds containing non-idempotent
1160 * operations, *except* those that are 4.1-specific (since
1161 * sessions provide their own EOS), and except for stateful
1162 * operations other than setclientid and setclientid_confirm
1163 * (since sequence numbers provide EOS for open, lock, etc in
1164 * the v4.0 case).
1165 */
1166 OP_CACHEME = 1 << 6,
1167 /*
1168 * These are ops which clear current state id.
1169 */
1170 OP_CLEAR_STATEID = 1 << 7,
1171 };
1172
1173 struct nfsd4_operation {
1174 nfsd4op_func op_func;
1175 u32 op_flags;
1176 char *op_name;
1177 /* Try to get response size before operation */
1178 nfsd4op_rsize op_rsize_bop;
1179 stateid_getter op_get_currentstateid;
1180 stateid_setter op_set_currentstateid;
1181 };
1182
1183 static struct nfsd4_operation nfsd4_ops[];
1184
1185 #ifdef NFSD_DEBUG
1186 static const char *nfsd4_op_name(unsigned opnum);
1187 #endif
1188
1189 /*
1190 * Enforce NFSv4.1 COMPOUND ordering rules:
1191 *
1192 * Also note, enforced elsewhere:
1193 * - SEQUENCE other than as first op results in
1194 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1195 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1196 * (Enforced in nfsd4_bind_conn_to_session().)
1197 * - DESTROY_SESSION must be the final operation in a compound, if
1198 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1199 * (Enforced in nfsd4_destroy_session().)
1200 */
1201 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1202 {
1203 struct nfsd4_op *op = &args->ops[0];
1204
1205 /* These ordering requirements don't apply to NFSv4.0: */
1206 if (args->minorversion == 0)
1207 return nfs_ok;
1208 /* This is weird, but OK, not our problem: */
1209 if (args->opcnt == 0)
1210 return nfs_ok;
1211 if (op->status == nfserr_op_illegal)
1212 return nfs_ok;
1213 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1214 return nfserr_op_not_in_session;
1215 if (op->opnum == OP_SEQUENCE)
1216 return nfs_ok;
1217 if (args->opcnt != 1)
1218 return nfserr_not_only_op;
1219 return nfs_ok;
1220 }
1221
1222 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1223 {
1224 return &nfsd4_ops[op->opnum];
1225 }
1226
1227 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1228 {
1229 return OPDESC(op)->op_flags & OP_CACHEME;
1230 }
1231
1232 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1233 {
1234 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1235 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1236 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1237 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1238 struct nfsd4_operation *thisd;
1239 struct nfsd4_operation *nextd;
1240
1241 thisd = OPDESC(this);
1242 /*
1243 * Most ops check wronsec on our own; only the putfh-like ops
1244 * have special rules.
1245 */
1246 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1247 return false;
1248 /*
1249 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1250 * put-filehandle operation if we're not going to use the
1251 * result:
1252 */
1253 if (argp->opcnt == resp->opcnt)
1254 return false;
1255
1256 nextd = OPDESC(next);
1257 /*
1258 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1259 * errors themselves as necessary; others should check for them
1260 * now:
1261 */
1262 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1263 }
1264
1265 /*
1266 * COMPOUND call.
1267 */
1268 static __be32
1269 nfsd4_proc_compound(struct svc_rqst *rqstp,
1270 struct nfsd4_compoundargs *args,
1271 struct nfsd4_compoundres *resp)
1272 {
1273 struct nfsd4_op *op;
1274 struct nfsd4_operation *opdesc;
1275 struct nfsd4_compound_state *cstate = &resp->cstate;
1276 int slack_bytes;
1277 u32 plen = 0;
1278 __be32 status;
1279
1280 resp->xbuf = &rqstp->rq_res;
1281 resp->p = rqstp->rq_res.head[0].iov_base +
1282 rqstp->rq_res.head[0].iov_len;
1283 resp->tagp = resp->p;
1284 /* reserve space for: taglen, tag, and opcnt */
1285 resp->p += 2 + XDR_QUADLEN(args->taglen);
1286 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1287 resp->taglen = args->taglen;
1288 resp->tag = args->tag;
1289 resp->opcnt = 0;
1290 resp->rqstp = rqstp;
1291 resp->cstate.minorversion = args->minorversion;
1292 resp->cstate.replay_owner = NULL;
1293 resp->cstate.session = NULL;
1294 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1295 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1296 /*
1297 * Don't use the deferral mechanism for NFSv4; compounds make it
1298 * too hard to avoid non-idempotency problems.
1299 */
1300 rqstp->rq_usedeferral = 0;
1301
1302 /*
1303 * According to RFC3010, this takes precedence over all other errors.
1304 */
1305 status = nfserr_minor_vers_mismatch;
1306 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1307 goto out;
1308
1309 status = nfs41_check_op_ordering(args);
1310 if (status) {
1311 op = &args->ops[0];
1312 op->status = status;
1313 goto encode_op;
1314 }
1315
1316 while (!status && resp->opcnt < args->opcnt) {
1317 op = &args->ops[resp->opcnt++];
1318
1319 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1320 resp->opcnt, args->opcnt, op->opnum,
1321 nfsd4_op_name(op->opnum));
1322 /*
1323 * The XDR decode routines may have pre-set op->status;
1324 * for example, if there is a miscellaneous XDR error
1325 * it will be set to nfserr_bad_xdr.
1326 */
1327 if (op->status) {
1328 if (op->opnum == OP_OPEN)
1329 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1330 goto encode_op;
1331 }
1332
1333 /* We must be able to encode a successful response to
1334 * this operation, with enough room left over to encode a
1335 * failed response to the next operation. If we don't
1336 * have enough room, fail with ERR_RESOURCE.
1337 */
1338 slack_bytes = (char *)resp->end - (char *)resp->p;
1339 if (slack_bytes < COMPOUND_SLACK_SPACE
1340 + COMPOUND_ERR_SLACK_SPACE) {
1341 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1342 op->status = nfserr_resource;
1343 goto encode_op;
1344 }
1345
1346 opdesc = OPDESC(op);
1347
1348 if (!cstate->current_fh.fh_dentry) {
1349 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1350 op->status = nfserr_nofilehandle;
1351 goto encode_op;
1352 }
1353 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1354 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1355 op->status = nfserr_moved;
1356 goto encode_op;
1357 }
1358
1359 /* If op is non-idempotent */
1360 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1361 plen = opdesc->op_rsize_bop(rqstp, op);
1362 op->status = nfsd4_check_resp_size(resp, plen);
1363 }
1364
1365 if (op->status)
1366 goto encode_op;
1367
1368 if (opdesc->op_get_currentstateid)
1369 opdesc->op_get_currentstateid(cstate, &op->u);
1370 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1371
1372 if (!op->status) {
1373 if (opdesc->op_set_currentstateid)
1374 opdesc->op_set_currentstateid(cstate, &op->u);
1375
1376 if (opdesc->op_flags & OP_CLEAR_STATEID)
1377 clear_current_stateid(cstate);
1378
1379 if (need_wrongsec_check(rqstp))
1380 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1381 }
1382
1383 encode_op:
1384 /* Only from SEQUENCE */
1385 if (resp->cstate.status == nfserr_replay_cache) {
1386 dprintk("%s NFS4.1 replay from cache\n", __func__);
1387 status = op->status;
1388 goto out;
1389 }
1390 if (op->status == nfserr_replay_me) {
1391 op->replay = &cstate->replay_owner->so_replay;
1392 nfsd4_encode_replay(resp, op);
1393 status = op->status = op->replay->rp_status;
1394 } else {
1395 nfsd4_encode_operation(resp, op);
1396 status = op->status;
1397 }
1398
1399 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1400 args->ops, args->opcnt, resp->opcnt, op->opnum,
1401 be32_to_cpu(status));
1402
1403 if (cstate->replay_owner) {
1404 nfs4_unlock_state();
1405 cstate->replay_owner = NULL;
1406 }
1407 /* XXX Ugh, we need to get rid of this kind of special case: */
1408 if (op->opnum == OP_READ && op->u.read.rd_filp)
1409 fput(op->u.read.rd_filp);
1410
1411 nfsd4_increment_op_stats(op->opnum);
1412 }
1413
1414 resp->cstate.status = status;
1415 fh_put(&resp->cstate.current_fh);
1416 fh_put(&resp->cstate.save_fh);
1417 BUG_ON(resp->cstate.replay_owner);
1418 out:
1419 /* Reset deferral mechanism for RPC deferrals */
1420 rqstp->rq_usedeferral = 1;
1421 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1422 return status;
1423 }
1424
1425 #define op_encode_hdr_size (2)
1426 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1427 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1428 #define op_encode_change_info_maxsz (5)
1429 #define nfs4_fattr_bitmap_maxsz (4)
1430
1431 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1432 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1433
1434 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1435
1436 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1437 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1438 op_encode_ace_maxsz)
1439
1440 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1441
1442 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1443 {
1444 return (op_encode_hdr_size) * sizeof(__be32);
1445 }
1446
1447 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1448 {
1449 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1450 }
1451
1452 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1453 {
1454 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1455 }
1456
1457 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1458 {
1459 return (op_encode_hdr_size + op_encode_change_info_maxsz
1460 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1461 }
1462
1463 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1464 {
1465 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1466 * sizeof(__be32);
1467 }
1468
1469 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1470 {
1471 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1472 * sizeof(__be32);
1473 }
1474
1475 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1476 {
1477 return (op_encode_hdr_size + op_encode_stateid_maxsz
1478 + op_encode_change_info_maxsz + 1
1479 + nfs4_fattr_bitmap_maxsz
1480 + op_encode_delegation_maxsz) * sizeof(__be32);
1481 }
1482
1483 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1484 {
1485 u32 maxcount = 0, rlen = 0;
1486
1487 maxcount = svc_max_payload(rqstp);
1488 rlen = op->u.read.rd_length;
1489
1490 if (rlen > maxcount)
1491 rlen = maxcount;
1492
1493 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1494 }
1495
1496 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1497 {
1498 u32 rlen = op->u.readdir.rd_maxcount;
1499
1500 if (rlen > PAGE_SIZE)
1501 rlen = PAGE_SIZE;
1502
1503 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1504 * sizeof(__be32) + rlen;
1505 }
1506
1507 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1508 {
1509 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1510 * sizeof(__be32);
1511 }
1512
1513 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1514 {
1515 return (op_encode_hdr_size + op_encode_change_info_maxsz
1516 + op_encode_change_info_maxsz) * sizeof(__be32);
1517 }
1518
1519 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1520 {
1521 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1522 }
1523
1524 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1525 {
1526 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1527 }
1528
1529 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1530 {
1531 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1532 }
1533
1534 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1535 {
1536 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1537 1 + 1 + /* eir_flags, spr_how */\
1538 4 + /* spo_must_enforce & _allow with bitmap */\
1539 2 + /*eir_server_owner.so_minor_id */\
1540 /* eir_server_owner.so_major_id<> */\
1541 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1542 /* eir_server_scope<> */\
1543 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1544 1 + /* eir_server_impl_id array length */\
1545 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1546 }
1547
1548 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1549 {
1550 return (op_encode_hdr_size + \
1551 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1552 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1553 }
1554
1555 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1556 {
1557 return (op_encode_hdr_size + \
1558 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1559 2 + /* csr_sequence, csr_flags */\
1560 op_encode_channel_attrs_maxsz + \
1561 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1562 }
1563
1564 static struct nfsd4_operation nfsd4_ops[] = {
1565 [OP_ACCESS] = {
1566 .op_func = (nfsd4op_func)nfsd4_access,
1567 .op_name = "OP_ACCESS",
1568 },
1569 [OP_CLOSE] = {
1570 .op_func = (nfsd4op_func)nfsd4_close,
1571 .op_flags = OP_MODIFIES_SOMETHING,
1572 .op_name = "OP_CLOSE",
1573 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1574 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1575 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1576 },
1577 [OP_COMMIT] = {
1578 .op_func = (nfsd4op_func)nfsd4_commit,
1579 .op_flags = OP_MODIFIES_SOMETHING,
1580 .op_name = "OP_COMMIT",
1581 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1582 },
1583 [OP_CREATE] = {
1584 .op_func = (nfsd4op_func)nfsd4_create,
1585 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1586 .op_name = "OP_CREATE",
1587 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1588 },
1589 [OP_DELEGRETURN] = {
1590 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1591 .op_flags = OP_MODIFIES_SOMETHING,
1592 .op_name = "OP_DELEGRETURN",
1593 .op_rsize_bop = nfsd4_only_status_rsize,
1594 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1595 },
1596 [OP_GETATTR] = {
1597 .op_func = (nfsd4op_func)nfsd4_getattr,
1598 .op_flags = ALLOWED_ON_ABSENT_FS,
1599 .op_name = "OP_GETATTR",
1600 },
1601 [OP_GETFH] = {
1602 .op_func = (nfsd4op_func)nfsd4_getfh,
1603 .op_name = "OP_GETFH",
1604 },
1605 [OP_LINK] = {
1606 .op_func = (nfsd4op_func)nfsd4_link,
1607 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1608 | OP_CACHEME,
1609 .op_name = "OP_LINK",
1610 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1611 },
1612 [OP_LOCK] = {
1613 .op_func = (nfsd4op_func)nfsd4_lock,
1614 .op_flags = OP_MODIFIES_SOMETHING,
1615 .op_name = "OP_LOCK",
1616 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1617 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1618 },
1619 [OP_LOCKT] = {
1620 .op_func = (nfsd4op_func)nfsd4_lockt,
1621 .op_name = "OP_LOCKT",
1622 },
1623 [OP_LOCKU] = {
1624 .op_func = (nfsd4op_func)nfsd4_locku,
1625 .op_flags = OP_MODIFIES_SOMETHING,
1626 .op_name = "OP_LOCKU",
1627 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1628 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1629 },
1630 [OP_LOOKUP] = {
1631 .op_func = (nfsd4op_func)nfsd4_lookup,
1632 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1633 .op_name = "OP_LOOKUP",
1634 },
1635 [OP_LOOKUPP] = {
1636 .op_func = (nfsd4op_func)nfsd4_lookupp,
1637 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1638 .op_name = "OP_LOOKUPP",
1639 },
1640 [OP_NVERIFY] = {
1641 .op_func = (nfsd4op_func)nfsd4_nverify,
1642 .op_name = "OP_NVERIFY",
1643 },
1644 [OP_OPEN] = {
1645 .op_func = (nfsd4op_func)nfsd4_open,
1646 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1647 .op_name = "OP_OPEN",
1648 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1649 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1650 },
1651 [OP_OPEN_CONFIRM] = {
1652 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1653 .op_flags = OP_MODIFIES_SOMETHING,
1654 .op_name = "OP_OPEN_CONFIRM",
1655 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1656 },
1657 [OP_OPEN_DOWNGRADE] = {
1658 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1659 .op_flags = OP_MODIFIES_SOMETHING,
1660 .op_name = "OP_OPEN_DOWNGRADE",
1661 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1662 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1663 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1664 },
1665 [OP_PUTFH] = {
1666 .op_func = (nfsd4op_func)nfsd4_putfh,
1667 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1668 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1669 | OP_CLEAR_STATEID,
1670 .op_name = "OP_PUTFH",
1671 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1672 },
1673 [OP_PUTPUBFH] = {
1674 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1675 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1676 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1677 | OP_CLEAR_STATEID,
1678 .op_name = "OP_PUTPUBFH",
1679 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1680 },
1681 [OP_PUTROOTFH] = {
1682 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1683 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1684 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1685 | OP_CLEAR_STATEID,
1686 .op_name = "OP_PUTROOTFH",
1687 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1688 },
1689 [OP_READ] = {
1690 .op_func = (nfsd4op_func)nfsd4_read,
1691 .op_flags = OP_MODIFIES_SOMETHING,
1692 .op_name = "OP_READ",
1693 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1694 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1695 },
1696 [OP_READDIR] = {
1697 .op_func = (nfsd4op_func)nfsd4_readdir,
1698 .op_flags = OP_MODIFIES_SOMETHING,
1699 .op_name = "OP_READDIR",
1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1701 },
1702 [OP_READLINK] = {
1703 .op_func = (nfsd4op_func)nfsd4_readlink,
1704 .op_name = "OP_READLINK",
1705 },
1706 [OP_REMOVE] = {
1707 .op_func = (nfsd4op_func)nfsd4_remove,
1708 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1709 .op_name = "OP_REMOVE",
1710 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1711 },
1712 [OP_RENAME] = {
1713 .op_func = (nfsd4op_func)nfsd4_rename,
1714 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1715 .op_name = "OP_RENAME",
1716 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1717 },
1718 [OP_RENEW] = {
1719 .op_func = (nfsd4op_func)nfsd4_renew,
1720 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1721 | OP_MODIFIES_SOMETHING,
1722 .op_name = "OP_RENEW",
1723 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1724
1725 },
1726 [OP_RESTOREFH] = {
1727 .op_func = (nfsd4op_func)nfsd4_restorefh,
1728 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1729 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1730 .op_name = "OP_RESTOREFH",
1731 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1732 },
1733 [OP_SAVEFH] = {
1734 .op_func = (nfsd4op_func)nfsd4_savefh,
1735 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1736 .op_name = "OP_SAVEFH",
1737 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1738 },
1739 [OP_SECINFO] = {
1740 .op_func = (nfsd4op_func)nfsd4_secinfo,
1741 .op_flags = OP_HANDLES_WRONGSEC,
1742 .op_name = "OP_SECINFO",
1743 },
1744 [OP_SETATTR] = {
1745 .op_func = (nfsd4op_func)nfsd4_setattr,
1746 .op_name = "OP_SETATTR",
1747 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1749 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1750 },
1751 [OP_SETCLIENTID] = {
1752 .op_func = (nfsd4op_func)nfsd4_setclientid,
1753 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1754 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1755 .op_name = "OP_SETCLIENTID",
1756 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1757 },
1758 [OP_SETCLIENTID_CONFIRM] = {
1759 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1760 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1761 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1762 .op_name = "OP_SETCLIENTID_CONFIRM",
1763 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1764 },
1765 [OP_VERIFY] = {
1766 .op_func = (nfsd4op_func)nfsd4_verify,
1767 .op_name = "OP_VERIFY",
1768 },
1769 [OP_WRITE] = {
1770 .op_func = (nfsd4op_func)nfsd4_write,
1771 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1772 .op_name = "OP_WRITE",
1773 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1774 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1775 },
1776 [OP_RELEASE_LOCKOWNER] = {
1777 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1778 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1779 | OP_MODIFIES_SOMETHING,
1780 .op_name = "OP_RELEASE_LOCKOWNER",
1781 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1782 },
1783
1784 /* NFSv4.1 operations */
1785 [OP_EXCHANGE_ID] = {
1786 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1787 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1788 | OP_MODIFIES_SOMETHING,
1789 .op_name = "OP_EXCHANGE_ID",
1790 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1791 },
1792 [OP_BACKCHANNEL_CTL] = {
1793 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1794 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1795 .op_name = "OP_BACKCHANNEL_CTL",
1796 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1797 },
1798 [OP_BIND_CONN_TO_SESSION] = {
1799 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1800 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1801 | OP_MODIFIES_SOMETHING,
1802 .op_name = "OP_BIND_CONN_TO_SESSION",
1803 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1804 },
1805 [OP_CREATE_SESSION] = {
1806 .op_func = (nfsd4op_func)nfsd4_create_session,
1807 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1808 | OP_MODIFIES_SOMETHING,
1809 .op_name = "OP_CREATE_SESSION",
1810 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1811 },
1812 [OP_DESTROY_SESSION] = {
1813 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1814 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1815 | OP_MODIFIES_SOMETHING,
1816 .op_name = "OP_DESTROY_SESSION",
1817 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1818 },
1819 [OP_SEQUENCE] = {
1820 .op_func = (nfsd4op_func)nfsd4_sequence,
1821 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1822 .op_name = "OP_SEQUENCE",
1823 },
1824 [OP_DESTROY_CLIENTID] = {
1825 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1826 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1827 | OP_MODIFIES_SOMETHING,
1828 .op_name = "OP_DESTROY_CLIENTID",
1829 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1830 },
1831 [OP_RECLAIM_COMPLETE] = {
1832 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1833 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1834 .op_name = "OP_RECLAIM_COMPLETE",
1835 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1836 },
1837 [OP_SECINFO_NO_NAME] = {
1838 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1839 .op_flags = OP_HANDLES_WRONGSEC,
1840 .op_name = "OP_SECINFO_NO_NAME",
1841 },
1842 [OP_TEST_STATEID] = {
1843 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1844 .op_flags = ALLOWED_WITHOUT_FH,
1845 .op_name = "OP_TEST_STATEID",
1846 },
1847 [OP_FREE_STATEID] = {
1848 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1849 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1850 .op_name = "OP_FREE_STATEID",
1851 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1852 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1853 },
1854 };
1855
1856 #ifdef NFSD_DEBUG
1857 static const char *nfsd4_op_name(unsigned opnum)
1858 {
1859 if (opnum < ARRAY_SIZE(nfsd4_ops))
1860 return nfsd4_ops[opnum].op_name;
1861 return "unknown_operation";
1862 }
1863 #endif
1864
1865 #define nfsd4_voidres nfsd4_voidargs
1866 struct nfsd4_voidargs { int dummy; };
1867
1868 static struct svc_procedure nfsd_procedures4[2] = {
1869 [NFSPROC4_NULL] = {
1870 .pc_func = (svc_procfunc) nfsd4_proc_null,
1871 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1872 .pc_argsize = sizeof(struct nfsd4_voidargs),
1873 .pc_ressize = sizeof(struct nfsd4_voidres),
1874 .pc_cachetype = RC_NOCACHE,
1875 .pc_xdrressize = 1,
1876 },
1877 [NFSPROC4_COMPOUND] = {
1878 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1879 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1880 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1881 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1882 .pc_ressize = sizeof(struct nfsd4_compoundres),
1883 .pc_release = nfsd4_release_compoundargs,
1884 .pc_cachetype = RC_NOCACHE,
1885 .pc_xdrressize = NFSD_BUFSIZE/4,
1886 },
1887 };
1888
1889 struct svc_version nfsd_version4 = {
1890 .vs_vers = 4,
1891 .vs_nproc = 2,
1892 .vs_proc = nfsd_procedures4,
1893 .vs_dispatch = nfsd_dispatch,
1894 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1895 .vs_rpcb_optnl = 1,
1896 };
1897
1898 /*
1899 * Local variables:
1900 * c-basic-offset: 8
1901 * End:
1902 */
Linux with added FPC-III support