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Bluetooth: vhci: Fix race at creating hci device
[linux/fpc-iii.git] / fs / nfsd / nfs4proc.c
blob606d5aa33d7688fd09ab021647866c2fed7b0b00
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 exp_get(src->fh_export);
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 /* check seqid for replay. set nfs4_owner */
389 resp = rqstp->rq_resp;
390 status = nfsd4_process_open1(&resp->cstate, open, nn);
391 if (status == nfserr_replay_me) {
392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
393 fh_put(&cstate->current_fh);
394 fh_copy_shallow(&cstate->current_fh.fh_handle,
395 &rp->rp_openfh);
396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
397 if (status)
398 dprintk("nfsd4_open: replay failed"
399 " restoring previous filehandle\n");
400 else
401 status = nfserr_replay_me;
402 }
403 if (status)
404 goto out;
405 if (open->op_xdr_error) {
406 status = open->op_xdr_error;
407 goto out;
408 }
409
410 status = nfsd4_check_open_attributes(rqstp, cstate, open);
411 if (status)
412 goto out;
413
414 /* Openowner is now set, so sequence id will get bumped. Now we need
415 * these checks before we do any creates: */
416 status = nfserr_grace;
417 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
418 goto out;
419 status = nfserr_no_grace;
420 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
421 goto out;
422
423 switch (open->op_claim_type) {
424 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
425 case NFS4_OPEN_CLAIM_NULL:
426 status = do_open_lookup(rqstp, cstate, open, &resfh);
427 if (status)
428 goto out;
429 break;
430 case NFS4_OPEN_CLAIM_PREVIOUS:
431 status = nfs4_check_open_reclaim(&open->op_clientid,
432 cstate, nn);
433 if (status)
434 goto out;
435 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
436 case NFS4_OPEN_CLAIM_FH:
437 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
438 status = do_open_fhandle(rqstp, cstate, open);
439 if (status)
440 goto out;
441 resfh = &cstate->current_fh;
442 break;
443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
444 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
445 dprintk("NFSD: unsupported OPEN claim type %d\n",
446 open->op_claim_type);
447 status = nfserr_notsupp;
448 goto out;
449 default:
450 dprintk("NFSD: Invalid OPEN claim type %d\n",
451 open->op_claim_type);
452 status = nfserr_inval;
453 goto out;
454 }
455 /*
456 * nfsd4_process_open2() does the actual opening of the file. If
457 * successful, it (1) truncates the file if open->op_truncate was
458 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
459 */
460 status = nfsd4_process_open2(rqstp, resfh, open);
461 WARN(status && open->op_created,
462 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
463 be32_to_cpu(status));
464 out:
465 if (resfh && resfh != &cstate->current_fh) {
466 fh_dup2(&cstate->current_fh, resfh);
467 fh_put(resfh);
468 kfree(resfh);
469 }
470 nfsd4_cleanup_open_state(cstate, open, status);
471 nfsd4_bump_seqid(cstate, status);
472 return status;
473 }
474
475 /*
476 * OPEN is the only seqid-mutating operation whose decoding can fail
477 * with a seqid-mutating error (specifically, decoding of user names in
478 * the attributes). Therefore we have to do some processing to look up
479 * the stateowner so that we can bump the seqid.
480 */
481 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
482 {
483 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
484
485 if (!seqid_mutating_err(ntohl(op->status)))
486 return op->status;
487 if (nfsd4_has_session(cstate))
488 return op->status;
489 open->op_xdr_error = op->status;
490 return nfsd4_open(rqstp, cstate, open);
491 }
492
493 /*
494 * filehandle-manipulating ops.
495 */
496 static __be32
497 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
498 struct svc_fh **getfh)
499 {
500 if (!cstate->current_fh.fh_dentry)
501 return nfserr_nofilehandle;
502
503 *getfh = &cstate->current_fh;
504 return nfs_ok;
505 }
506
507 static __be32
508 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
509 struct nfsd4_putfh *putfh)
510 {
511 fh_put(&cstate->current_fh);
512 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
513 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
514 putfh->pf_fhlen);
515 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
516 }
517
518 static __be32
519 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
520 void *arg)
521 {
522 __be32 status;
523
524 fh_put(&cstate->current_fh);
525 status = exp_pseudoroot(rqstp, &cstate->current_fh);
526 return status;
527 }
528
529 static __be32
530 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
531 void *arg)
532 {
533 if (!cstate->save_fh.fh_dentry)
534 return nfserr_restorefh;
535
536 fh_dup2(&cstate->current_fh, &cstate->save_fh);
537 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
538 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
539 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
540 }
541 return nfs_ok;
542 }
543
544 static __be32
545 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
546 void *arg)
547 {
548 if (!cstate->current_fh.fh_dentry)
549 return nfserr_nofilehandle;
550
551 fh_dup2(&cstate->save_fh, &cstate->current_fh);
552 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
553 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
554 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
555 }
556 return nfs_ok;
557 }
558
559 /*
560 * misc nfsv4 ops
561 */
562 static __be32
563 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
564 struct nfsd4_access *access)
565 {
566 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
567 return nfserr_inval;
568
569 access->ac_resp_access = access->ac_req_access;
570 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
571 &access->ac_supported);
572 }
573
574 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
575 {
576 __be32 verf[2];
577 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
578
579 /*
580 * This is opaque to client, so no need to byte-swap. Use
581 * __force to keep sparse happy
582 */
583 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
584 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
585 memcpy(verifier->data, verf, sizeof(verifier->data));
586 }
587
588 static __be32
589 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
590 struct nfsd4_commit *commit)
591 {
592 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
593 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
594 commit->co_count);
595 }
596
597 static __be32
598 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
599 struct nfsd4_create *create)
600 {
601 struct svc_fh resfh;
602 __be32 status;
603 dev_t rdev;
604
605 fh_init(&resfh, NFS4_FHSIZE);
606
607 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
608 NFSD_MAY_CREATE);
609 if (status)
610 return status;
611
612 status = check_attr_support(rqstp, cstate, create->cr_bmval,
613 nfsd_attrmask);
614 if (status)
615 return status;
616
617 switch (create->cr_type) {
618 case NF4LNK:
619 status = nfsd_symlink(rqstp, &cstate->current_fh,
620 create->cr_name, create->cr_namelen,
621 create->cr_data, &resfh);
622 break;
623
624 case NF4BLK:
625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
626 if (MAJOR(rdev) != create->cr_specdata1 ||
627 MINOR(rdev) != create->cr_specdata2)
628 return nfserr_inval;
629 status = nfsd_create(rqstp, &cstate->current_fh,
630 create->cr_name, create->cr_namelen,
631 &create->cr_iattr, S_IFBLK, rdev, &resfh);
632 break;
633
634 case NF4CHR:
635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
636 if (MAJOR(rdev) != create->cr_specdata1 ||
637 MINOR(rdev) != create->cr_specdata2)
638 return nfserr_inval;
639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr,S_IFCHR, rdev, &resfh);
642 break;
643
644 case NF4SOCK:
645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFSOCK, 0, &resfh);
648 break;
649
650 case NF4FIFO:
651 status = nfsd_create(rqstp, &cstate->current_fh,
652 create->cr_name, create->cr_namelen,
653 &create->cr_iattr, S_IFIFO, 0, &resfh);
654 break;
655
656 case NF4DIR:
657 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
658 status = nfsd_create(rqstp, &cstate->current_fh,
659 create->cr_name, create->cr_namelen,
660 &create->cr_iattr, S_IFDIR, 0, &resfh);
661 break;
662
663 default:
664 status = nfserr_badtype;
665 }
666
667 if (status)
668 goto out;
669
670 if (create->cr_label.len)
671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
672
673 if (create->cr_acl != NULL)
674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
675 create->cr_bmval);
676
677 fh_unlock(&cstate->current_fh);
678 set_change_info(&create->cr_cinfo, &cstate->current_fh);
679 fh_dup2(&cstate->current_fh, &resfh);
680 out:
681 fh_put(&resfh);
682 return status;
683 }
684
685 static __be32
686 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
687 struct nfsd4_getattr *getattr)
688 {
689 __be32 status;
690
691 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
692 if (status)
693 return status;
694
695 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
696 return nfserr_inval;
697
698 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
699 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
700 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
701
702 getattr->ga_fhp = &cstate->current_fh;
703 return nfs_ok;
704 }
705
706 static __be32
707 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 struct nfsd4_link *link)
709 {
710 __be32 status = nfserr_nofilehandle;
711
712 if (!cstate->save_fh.fh_dentry)
713 return status;
714 status = nfsd_link(rqstp, &cstate->current_fh,
715 link->li_name, link->li_namelen, &cstate->save_fh);
716 if (!status)
717 set_change_info(&link->li_cinfo, &cstate->current_fh);
718 return status;
719 }
720
721 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
722 {
723 struct svc_fh tmp_fh;
724 __be32 ret;
725
726 fh_init(&tmp_fh, NFS4_FHSIZE);
727 ret = exp_pseudoroot(rqstp, &tmp_fh);
728 if (ret)
729 return ret;
730 if (tmp_fh.fh_dentry == fh->fh_dentry) {
731 fh_put(&tmp_fh);
732 return nfserr_noent;
733 }
734 fh_put(&tmp_fh);
735 return nfsd_lookup(rqstp, fh, "..", 2, fh);
736 }
737
738 static __be32
739 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
740 void *arg)
741 {
742 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
743 }
744
745 static __be32
746 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
747 struct nfsd4_lookup *lookup)
748 {
749 return nfsd_lookup(rqstp, &cstate->current_fh,
750 lookup->lo_name, lookup->lo_len,
751 &cstate->current_fh);
752 }
753
754 static __be32
755 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
756 struct nfsd4_read *read)
757 {
758 __be32 status;
759
760 /* no need to check permission - this will be done in nfsd_read() */
761
762 read->rd_filp = NULL;
763 if (read->rd_offset >= OFFSET_MAX)
764 return nfserr_inval;
765
766 /*
767 * If we do a zero copy read, then a client will see read data
768 * that reflects the state of the file *after* performing the
769 * following compound.
770 *
771 * To ensure proper ordering, we therefore turn off zero copy if
772 * the client wants us to do more in this compound:
773 */
774 if (!nfsd4_last_compound_op(rqstp))
775 rqstp->rq_splice_ok = false;
776
777 /* check stateid */
778 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
779 cstate, &read->rd_stateid,
780 RD_STATE, &read->rd_filp))) {
781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
782 goto out;
783 }
784 status = nfs_ok;
785 out:
786 read->rd_rqstp = rqstp;
787 read->rd_fhp = &cstate->current_fh;
788 return status;
789 }
790
791 static __be32
792 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
793 struct nfsd4_readdir *readdir)
794 {
795 u64 cookie = readdir->rd_cookie;
796 static const nfs4_verifier zeroverf;
797
798 /* no need to check permission - this will be done in nfsd_readdir() */
799
800 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
801 return nfserr_inval;
802
803 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
804 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
805 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
806
807 if ((cookie == 1) || (cookie == 2) ||
808 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
809 return nfserr_bad_cookie;
810
811 readdir->rd_rqstp = rqstp;
812 readdir->rd_fhp = &cstate->current_fh;
813 return nfs_ok;
814 }
815
816 static __be32
817 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
818 struct nfsd4_readlink *readlink)
819 {
820 readlink->rl_rqstp = rqstp;
821 readlink->rl_fhp = &cstate->current_fh;
822 return nfs_ok;
823 }
824
825 static __be32
826 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
827 struct nfsd4_remove *remove)
828 {
829 __be32 status;
830
831 if (locks_in_grace(SVC_NET(rqstp)))
832 return nfserr_grace;
833 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
834 remove->rm_name, remove->rm_namelen);
835 if (!status) {
836 fh_unlock(&cstate->current_fh);
837 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
838 }
839 return status;
840 }
841
842 static __be32
843 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
844 struct nfsd4_rename *rename)
845 {
846 __be32 status = nfserr_nofilehandle;
847
848 if (!cstate->save_fh.fh_dentry)
849 return status;
850 if (locks_in_grace(SVC_NET(rqstp)) &&
851 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
852 return nfserr_grace;
853 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
854 rename->rn_snamelen, &cstate->current_fh,
855 rename->rn_tname, rename->rn_tnamelen);
856 if (status)
857 return status;
858 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
859 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
860 return nfs_ok;
861 }
862
863 static __be32
864 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
865 struct nfsd4_secinfo *secinfo)
866 {
867 struct svc_fh resfh;
868 struct svc_export *exp;
869 struct dentry *dentry;
870 __be32 err;
871
872 fh_init(&resfh, NFS4_FHSIZE);
873 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
874 if (err)
875 return err;
876 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
877 secinfo->si_name, secinfo->si_namelen,
878 &exp, &dentry);
879 if (err)
880 return err;
881 fh_unlock(&cstate->current_fh);
882 if (dentry->d_inode == NULL) {
883 exp_put(exp);
884 err = nfserr_noent;
885 } else
886 secinfo->si_exp = exp;
887 dput(dentry);
888 if (cstate->minorversion)
889 /* See rfc 5661 section 2.6.3.1.1.8 */
890 fh_put(&cstate->current_fh);
891 return err;
892 }
893
894 static __be32
895 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
896 struct nfsd4_secinfo_no_name *sin)
897 {
898 __be32 err;
899
900 switch (sin->sin_style) {
901 case NFS4_SECINFO_STYLE4_CURRENT_FH:
902 break;
903 case NFS4_SECINFO_STYLE4_PARENT:
904 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
905 if (err)
906 return err;
907 break;
908 default:
909 return nfserr_inval;
910 }
911
912 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
913 fh_put(&cstate->current_fh);
914 return nfs_ok;
915 }
916
917 static __be32
918 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
919 struct nfsd4_setattr *setattr)
920 {
921 __be32 status = nfs_ok;
922 int err;
923
924 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
925 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
926 &setattr->sa_stateid, WR_STATE, NULL);
927 if (status) {
928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
929 return status;
930 }
931 }
932 err = fh_want_write(&cstate->current_fh);
933 if (err)
934 return nfserrno(err);
935 status = nfs_ok;
936
937 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
938 nfsd_attrmask);
939 if (status)
940 goto out;
941
942 if (setattr->sa_acl != NULL)
943 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
944 setattr->sa_acl);
945 if (status)
946 goto out;
947 if (setattr->sa_label.len)
948 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
949 &setattr->sa_label);
950 if (status)
951 goto out;
952 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
953 0, (time_t)0);
954 out:
955 fh_drop_write(&cstate->current_fh);
956 return status;
957 }
958
959 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
960 {
961 int i = 1;
962 int buflen = write->wr_buflen;
963
964 vec[0].iov_base = write->wr_head.iov_base;
965 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
966 buflen -= vec[0].iov_len;
967
968 while (buflen) {
969 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
970 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
971 buflen -= vec[i].iov_len;
972 i++;
973 }
974 return i;
975 }
976
977 static __be32
978 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
979 struct nfsd4_write *write)
980 {
981 stateid_t *stateid = &write->wr_stateid;
982 struct file *filp = NULL;
983 __be32 status = nfs_ok;
984 unsigned long cnt;
985 int nvecs;
986
987 /* no need to check permission - this will be done in nfsd_write() */
988
989 if (write->wr_offset >= OFFSET_MAX)
990 return nfserr_inval;
991
992 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
993 cstate, stateid, WR_STATE, &filp);
994 if (status) {
995 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
996 return status;
997 }
998
999 cnt = write->wr_buflen;
1000 write->wr_how_written = write->wr_stable_how;
1001 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1002
1003 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1004 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1005
1006 status = nfsd_write(rqstp, &cstate->current_fh, filp,
1007 write->wr_offset, rqstp->rq_vec, nvecs,
1008 &cnt, &write->wr_how_written);
1009 if (filp)
1010 fput(filp);
1011
1012 write->wr_bytes_written = cnt;
1013
1014 return status;
1015 }
1016
1017 static __be32
1018 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1019 struct nfsd4_seek *seek)
1020 {
1021 int whence;
1022 __be32 status;
1023 struct file *file;
1024
1025 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
1026 &seek->seek_stateid,
1027 RD_STATE, &file);
1028 if (status) {
1029 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1030 return status;
1031 }
1032 if (!file)
1033 return nfserr_bad_stateid;
1034
1035 switch (seek->seek_whence) {
1036 case NFS4_CONTENT_DATA:
1037 whence = SEEK_DATA;
1038 break;
1039 case NFS4_CONTENT_HOLE:
1040 whence = SEEK_HOLE;
1041 break;
1042 default:
1043 status = nfserr_union_notsupp;
1044 goto out;
1045 }
1046
1047 /*
1048 * Note: This call does change file->f_pos, but nothing in NFSD
1049 * should ever file->f_pos.
1050 */
1051 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1052 if (seek->seek_pos < 0)
1053 status = nfserrno(seek->seek_pos);
1054 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1055 seek->seek_eof = true;
1056
1057 out:
1058 fput(file);
1059 return status;
1060 }
1061
1062 /* This routine never returns NFS_OK! If there are no other errors, it
1063 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1064 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1065 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1066 */
1067 static __be32
1068 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1069 struct nfsd4_verify *verify)
1070 {
1071 __be32 *buf, *p;
1072 int count;
1073 __be32 status;
1074
1075 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1076 if (status)
1077 return status;
1078
1079 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1080 if (status)
1081 return status;
1082
1083 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1084 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1085 return nfserr_inval;
1086 if (verify->ve_attrlen & 3)
1087 return nfserr_inval;
1088
1089 /* count in words:
1090 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1091 */
1092 count = 4 + (verify->ve_attrlen >> 2);
1093 buf = kmalloc(count << 2, GFP_KERNEL);
1094 if (!buf)
1095 return nfserr_jukebox;
1096
1097 p = buf;
1098 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1099 cstate->current_fh.fh_export,
1100 cstate->current_fh.fh_dentry,
1101 verify->ve_bmval,
1102 rqstp, 0);
1103 /*
1104 * If nfsd4_encode_fattr() ran out of space, assume that's because
1105 * the attributes are longer (hence different) than those given:
1106 */
1107 if (status == nfserr_resource)
1108 status = nfserr_not_same;
1109 if (status)
1110 goto out_kfree;
1111
1112 /* skip bitmap */
1113 p = buf + 1 + ntohl(buf[0]);
1114 status = nfserr_not_same;
1115 if (ntohl(*p++) != verify->ve_attrlen)
1116 goto out_kfree;
1117 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1118 status = nfserr_same;
1119
1120 out_kfree:
1121 kfree(buf);
1122 return status;
1123 }
1124
1125 static __be32
1126 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1127 struct nfsd4_verify *verify)
1128 {
1129 __be32 status;
1130
1131 status = _nfsd4_verify(rqstp, cstate, verify);
1132 return status == nfserr_not_same ? nfs_ok : status;
1133 }
1134
1135 static __be32
1136 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1137 struct nfsd4_verify *verify)
1138 {
1139 __be32 status;
1140
1141 status = _nfsd4_verify(rqstp, cstate, verify);
1142 return status == nfserr_same ? nfs_ok : status;
1143 }
1144
1145 /*
1146 * NULL call.
1147 */
1148 static __be32
1149 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1150 {
1151 return nfs_ok;
1152 }
1153
1154 static inline void nfsd4_increment_op_stats(u32 opnum)
1155 {
1156 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1157 nfsdstats.nfs4_opcount[opnum]++;
1158 }
1159
1160 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1161 void *);
1162 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1163 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1164 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1165
1166 enum nfsd4_op_flags {
1167 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1168 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1169 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1170 /* For rfc 5661 section 2.6.3.1.1: */
1171 OP_HANDLES_WRONGSEC = 1 << 3,
1172 OP_IS_PUTFH_LIKE = 1 << 4,
1173 /*
1174 * These are the ops whose result size we estimate before
1175 * encoding, to avoid performing an op then not being able to
1176 * respond or cache a response. This includes writes and setattrs
1177 * as well as the operations usually called "nonidempotent":
1178 */
1179 OP_MODIFIES_SOMETHING = 1 << 5,
1180 /*
1181 * Cache compounds containing these ops in the xid-based drc:
1182 * We use the DRC for compounds containing non-idempotent
1183 * operations, *except* those that are 4.1-specific (since
1184 * sessions provide their own EOS), and except for stateful
1185 * operations other than setclientid and setclientid_confirm
1186 * (since sequence numbers provide EOS for open, lock, etc in
1187 * the v4.0 case).
1188 */
1189 OP_CACHEME = 1 << 6,
1190 /*
1191 * These are ops which clear current state id.
1192 */
1193 OP_CLEAR_STATEID = 1 << 7,
1194 };
1195
1196 struct nfsd4_operation {
1197 nfsd4op_func op_func;
1198 u32 op_flags;
1199 char *op_name;
1200 /* Try to get response size before operation */
1201 nfsd4op_rsize op_rsize_bop;
1202 stateid_getter op_get_currentstateid;
1203 stateid_setter op_set_currentstateid;
1204 };
1205
1206 static struct nfsd4_operation nfsd4_ops[];
1207
1208 static const char *nfsd4_op_name(unsigned opnum);
1209
1210 /*
1211 * Enforce NFSv4.1 COMPOUND ordering rules:
1212 *
1213 * Also note, enforced elsewhere:
1214 * - SEQUENCE other than as first op results in
1215 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1216 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1217 * (Enforced in nfsd4_bind_conn_to_session().)
1218 * - DESTROY_SESSION must be the final operation in a compound, if
1219 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1220 * (Enforced in nfsd4_destroy_session().)
1221 */
1222 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1223 {
1224 struct nfsd4_op *op = &args->ops[0];
1225
1226 /* These ordering requirements don't apply to NFSv4.0: */
1227 if (args->minorversion == 0)
1228 return nfs_ok;
1229 /* This is weird, but OK, not our problem: */
1230 if (args->opcnt == 0)
1231 return nfs_ok;
1232 if (op->status == nfserr_op_illegal)
1233 return nfs_ok;
1234 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1235 return nfserr_op_not_in_session;
1236 if (op->opnum == OP_SEQUENCE)
1237 return nfs_ok;
1238 if (args->opcnt != 1)
1239 return nfserr_not_only_op;
1240 return nfs_ok;
1241 }
1242
1243 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1244 {
1245 return &nfsd4_ops[op->opnum];
1246 }
1247
1248 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1249 {
1250 if (op->opnum == OP_ILLEGAL)
1251 return false;
1252 return OPDESC(op)->op_flags & OP_CACHEME;
1253 }
1254
1255 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1256 {
1257 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1258 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1259 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1260 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1261 struct nfsd4_operation *thisd;
1262 struct nfsd4_operation *nextd;
1263
1264 thisd = OPDESC(this);
1265 /*
1266 * Most ops check wronsec on our own; only the putfh-like ops
1267 * have special rules.
1268 */
1269 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1270 return false;
1271 /*
1272 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1273 * put-filehandle operation if we're not going to use the
1274 * result:
1275 */
1276 if (argp->opcnt == resp->opcnt)
1277 return false;
1278 if (next->opnum == OP_ILLEGAL)
1279 return false;
1280 nextd = OPDESC(next);
1281 /*
1282 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1283 * errors themselves as necessary; others should check for them
1284 * now:
1285 */
1286 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1287 }
1288
1289 static void svcxdr_init_encode(struct svc_rqst *rqstp,
1290 struct nfsd4_compoundres *resp)
1291 {
1292 struct xdr_stream *xdr = &resp->xdr;
1293 struct xdr_buf *buf = &rqstp->rq_res;
1294 struct kvec *head = buf->head;
1295
1296 xdr->buf = buf;
1297 xdr->iov = head;
1298 xdr->p = head->iov_base + head->iov_len;
1299 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1300 /* Tail and page_len should be zero at this point: */
1301 buf->len = buf->head[0].iov_len;
1302 xdr->scratch.iov_len = 0;
1303 xdr->page_ptr = buf->pages - 1;
1304 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1305 - rqstp->rq_auth_slack;
1306 }
1307
1308 /*
1309 * COMPOUND call.
1310 */
1311 static __be32
1312 nfsd4_proc_compound(struct svc_rqst *rqstp,
1313 struct nfsd4_compoundargs *args,
1314 struct nfsd4_compoundres *resp)
1315 {
1316 struct nfsd4_op *op;
1317 struct nfsd4_operation *opdesc;
1318 struct nfsd4_compound_state *cstate = &resp->cstate;
1319 struct svc_fh *current_fh = &cstate->current_fh;
1320 struct svc_fh *save_fh = &cstate->save_fh;
1321 __be32 status;
1322
1323 svcxdr_init_encode(rqstp, resp);
1324 resp->tagp = resp->xdr.p;
1325 /* reserve space for: taglen, tag, and opcnt */
1326 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1327 resp->taglen = args->taglen;
1328 resp->tag = args->tag;
1329 resp->rqstp = rqstp;
1330 cstate->minorversion = args->minorversion;
1331 fh_init(current_fh, NFS4_FHSIZE);
1332 fh_init(save_fh, NFS4_FHSIZE);
1333 /*
1334 * Don't use the deferral mechanism for NFSv4; compounds make it
1335 * too hard to avoid non-idempotency problems.
1336 */
1337 rqstp->rq_usedeferral = false;
1338
1339 /*
1340 * According to RFC3010, this takes precedence over all other errors.
1341 */
1342 status = nfserr_minor_vers_mismatch;
1343 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1344 goto out;
1345
1346 status = nfs41_check_op_ordering(args);
1347 if (status) {
1348 op = &args->ops[0];
1349 op->status = status;
1350 goto encode_op;
1351 }
1352
1353 while (!status && resp->opcnt < args->opcnt) {
1354 op = &args->ops[resp->opcnt++];
1355
1356 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1357 resp->opcnt, args->opcnt, op->opnum,
1358 nfsd4_op_name(op->opnum));
1359 /*
1360 * The XDR decode routines may have pre-set op->status;
1361 * for example, if there is a miscellaneous XDR error
1362 * it will be set to nfserr_bad_xdr.
1363 */
1364 if (op->status) {
1365 if (op->opnum == OP_OPEN)
1366 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1367 goto encode_op;
1368 }
1369
1370 opdesc = OPDESC(op);
1371
1372 if (!current_fh->fh_dentry) {
1373 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1374 op->status = nfserr_nofilehandle;
1375 goto encode_op;
1376 }
1377 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1378 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1379 op->status = nfserr_moved;
1380 goto encode_op;
1381 }
1382
1383 fh_clear_wcc(current_fh);
1384
1385 /* If op is non-idempotent */
1386 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1387 /*
1388 * Don't execute this op if we couldn't encode a
1389 * succesful reply:
1390 */
1391 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1392 /*
1393 * Plus if there's another operation, make sure
1394 * we'll have space to at least encode an error:
1395 */
1396 if (resp->opcnt < args->opcnt)
1397 plen += COMPOUND_ERR_SLACK_SPACE;
1398 op->status = nfsd4_check_resp_size(resp, plen);
1399 }
1400
1401 if (op->status)
1402 goto encode_op;
1403
1404 if (opdesc->op_get_currentstateid)
1405 opdesc->op_get_currentstateid(cstate, &op->u);
1406 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1407
1408 if (!op->status) {
1409 if (opdesc->op_set_currentstateid)
1410 opdesc->op_set_currentstateid(cstate, &op->u);
1411
1412 if (opdesc->op_flags & OP_CLEAR_STATEID)
1413 clear_current_stateid(cstate);
1414
1415 if (need_wrongsec_check(rqstp))
1416 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1417 }
1418
1419 encode_op:
1420 /* Only from SEQUENCE */
1421 if (cstate->status == nfserr_replay_cache) {
1422 dprintk("%s NFS4.1 replay from cache\n", __func__);
1423 status = op->status;
1424 goto out;
1425 }
1426 if (op->status == nfserr_replay_me) {
1427 op->replay = &cstate->replay_owner->so_replay;
1428 nfsd4_encode_replay(&resp->xdr, op);
1429 status = op->status = op->replay->rp_status;
1430 } else {
1431 nfsd4_encode_operation(resp, op);
1432 status = op->status;
1433 }
1434
1435 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1436 args->ops, args->opcnt, resp->opcnt, op->opnum,
1437 be32_to_cpu(status));
1438
1439 nfsd4_cstate_clear_replay(cstate);
1440 /* XXX Ugh, we need to get rid of this kind of special case: */
1441 if (op->opnum == OP_READ && op->u.read.rd_filp)
1442 fput(op->u.read.rd_filp);
1443
1444 nfsd4_increment_op_stats(op->opnum);
1445 }
1446
1447 cstate->status = status;
1448 fh_put(current_fh);
1449 fh_put(save_fh);
1450 BUG_ON(cstate->replay_owner);
1451 out:
1452 /* Reset deferral mechanism for RPC deferrals */
1453 rqstp->rq_usedeferral = true;
1454 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1455 return status;
1456 }
1457
1458 #define op_encode_hdr_size (2)
1459 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1460 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1461 #define op_encode_change_info_maxsz (5)
1462 #define nfs4_fattr_bitmap_maxsz (4)
1463
1464 /* We'll fall back on returning no lockowner if run out of space: */
1465 #define op_encode_lockowner_maxsz (0)
1466 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1467
1468 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1469
1470 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1471 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1472 op_encode_ace_maxsz)
1473
1474 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1475
1476 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1477 {
1478 return (op_encode_hdr_size) * sizeof(__be32);
1479 }
1480
1481 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1482 {
1483 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1484 }
1485
1486 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1487 {
1488 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1489 }
1490
1491 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1492 {
1493 return (op_encode_hdr_size + op_encode_change_info_maxsz
1494 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1495 }
1496
1497 /*
1498 * Note since this is an idempotent operation we won't insist on failing
1499 * the op prematurely if the estimate is too large. We may turn off splice
1500 * reads unnecessarily.
1501 */
1502 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1503 struct nfsd4_op *op)
1504 {
1505 u32 *bmap = op->u.getattr.ga_bmval;
1506 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1507 u32 ret = 0;
1508
1509 if (bmap0 & FATTR4_WORD0_ACL)
1510 return svc_max_payload(rqstp);
1511 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1512 return svc_max_payload(rqstp);
1513
1514 if (bmap1 & FATTR4_WORD1_OWNER) {
1515 ret += IDMAP_NAMESZ + 4;
1516 bmap1 &= ~FATTR4_WORD1_OWNER;
1517 }
1518 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1519 ret += IDMAP_NAMESZ + 4;
1520 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1521 }
1522 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1523 ret += NFS4_FHSIZE + 4;
1524 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1525 }
1526 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1527 ret += NFSD4_MAX_SEC_LABEL_LEN + 12;
1528 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1529 }
1530 /*
1531 * Largest of remaining attributes are 16 bytes (e.g.,
1532 * supported_attributes)
1533 */
1534 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1535 /* bitmask, length */
1536 ret += 20;
1537 return ret;
1538 }
1539
1540 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1541 {
1542 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1543 * sizeof(__be32);
1544 }
1545
1546 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1547 {
1548 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1549 * sizeof(__be32);
1550 }
1551
1552 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1553 {
1554 return (op_encode_hdr_size + op_encode_stateid_maxsz
1555 + op_encode_change_info_maxsz + 1
1556 + nfs4_fattr_bitmap_maxsz
1557 + op_encode_delegation_maxsz) * sizeof(__be32);
1558 }
1559
1560 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1561 {
1562 u32 maxcount = 0, rlen = 0;
1563
1564 maxcount = svc_max_payload(rqstp);
1565 rlen = min(op->u.read.rd_length, maxcount);
1566
1567 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1568 }
1569
1570 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1571 {
1572 u32 maxcount = 0, rlen = 0;
1573
1574 maxcount = svc_max_payload(rqstp);
1575 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1576
1577 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1578 XDR_QUADLEN(rlen)) * sizeof(__be32);
1579 }
1580
1581 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1582 {
1583 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1584 * sizeof(__be32);
1585 }
1586
1587 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1588 {
1589 return (op_encode_hdr_size + op_encode_change_info_maxsz
1590 + op_encode_change_info_maxsz) * sizeof(__be32);
1591 }
1592
1593 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1594 struct nfsd4_op *op)
1595 {
1596 return (op_encode_hdr_size
1597 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1598 }
1599
1600 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1601 {
1602 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1603 }
1604
1605 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1606 {
1607 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1608 sizeof(__be32);
1609 }
1610
1611 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1612 {
1613 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
1614 }
1615
1616 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1617 {
1618 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1619 1 + 1 + /* eir_flags, spr_how */\
1620 4 + /* spo_must_enforce & _allow with bitmap */\
1621 2 + /*eir_server_owner.so_minor_id */\
1622 /* eir_server_owner.so_major_id<> */\
1623 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1624 /* eir_server_scope<> */\
1625 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1626 1 + /* eir_server_impl_id array length */\
1627 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1628 }
1629
1630 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1631 {
1632 return (op_encode_hdr_size + \
1633 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1634 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1635 }
1636
1637 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1638 {
1639 return (op_encode_hdr_size + \
1640 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1641 2 + /* csr_sequence, csr_flags */\
1642 op_encode_channel_attrs_maxsz + \
1643 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1644 }
1645
1646 static struct nfsd4_operation nfsd4_ops[] = {
1647 [OP_ACCESS] = {
1648 .op_func = (nfsd4op_func)nfsd4_access,
1649 .op_name = "OP_ACCESS",
1650 },
1651 [OP_CLOSE] = {
1652 .op_func = (nfsd4op_func)nfsd4_close,
1653 .op_flags = OP_MODIFIES_SOMETHING,
1654 .op_name = "OP_CLOSE",
1655 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1656 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1657 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1658 },
1659 [OP_COMMIT] = {
1660 .op_func = (nfsd4op_func)nfsd4_commit,
1661 .op_flags = OP_MODIFIES_SOMETHING,
1662 .op_name = "OP_COMMIT",
1663 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1664 },
1665 [OP_CREATE] = {
1666 .op_func = (nfsd4op_func)nfsd4_create,
1667 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1668 .op_name = "OP_CREATE",
1669 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1670 },
1671 [OP_DELEGRETURN] = {
1672 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1673 .op_flags = OP_MODIFIES_SOMETHING,
1674 .op_name = "OP_DELEGRETURN",
1675 .op_rsize_bop = nfsd4_only_status_rsize,
1676 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1677 },
1678 [OP_GETATTR] = {
1679 .op_func = (nfsd4op_func)nfsd4_getattr,
1680 .op_flags = ALLOWED_ON_ABSENT_FS,
1681 .op_rsize_bop = nfsd4_getattr_rsize,
1682 .op_name = "OP_GETATTR",
1683 },
1684 [OP_GETFH] = {
1685 .op_func = (nfsd4op_func)nfsd4_getfh,
1686 .op_name = "OP_GETFH",
1687 },
1688 [OP_LINK] = {
1689 .op_func = (nfsd4op_func)nfsd4_link,
1690 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1691 | OP_CACHEME,
1692 .op_name = "OP_LINK",
1693 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1694 },
1695 [OP_LOCK] = {
1696 .op_func = (nfsd4op_func)nfsd4_lock,
1697 .op_flags = OP_MODIFIES_SOMETHING,
1698 .op_name = "OP_LOCK",
1699 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1700 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1701 },
1702 [OP_LOCKT] = {
1703 .op_func = (nfsd4op_func)nfsd4_lockt,
1704 .op_name = "OP_LOCKT",
1705 },
1706 [OP_LOCKU] = {
1707 .op_func = (nfsd4op_func)nfsd4_locku,
1708 .op_flags = OP_MODIFIES_SOMETHING,
1709 .op_name = "OP_LOCKU",
1710 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1711 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1712 },
1713 [OP_LOOKUP] = {
1714 .op_func = (nfsd4op_func)nfsd4_lookup,
1715 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1716 .op_name = "OP_LOOKUP",
1717 },
1718 [OP_LOOKUPP] = {
1719 .op_func = (nfsd4op_func)nfsd4_lookupp,
1720 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1721 .op_name = "OP_LOOKUPP",
1722 },
1723 [OP_NVERIFY] = {
1724 .op_func = (nfsd4op_func)nfsd4_nverify,
1725 .op_name = "OP_NVERIFY",
1726 },
1727 [OP_OPEN] = {
1728 .op_func = (nfsd4op_func)nfsd4_open,
1729 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1730 .op_name = "OP_OPEN",
1731 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1732 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1733 },
1734 [OP_OPEN_CONFIRM] = {
1735 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1736 .op_flags = OP_MODIFIES_SOMETHING,
1737 .op_name = "OP_OPEN_CONFIRM",
1738 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1739 },
1740 [OP_OPEN_DOWNGRADE] = {
1741 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1742 .op_flags = OP_MODIFIES_SOMETHING,
1743 .op_name = "OP_OPEN_DOWNGRADE",
1744 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1745 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1746 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1747 },
1748 [OP_PUTFH] = {
1749 .op_func = (nfsd4op_func)nfsd4_putfh,
1750 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1751 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
1752 .op_name = "OP_PUTFH",
1753 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1754 },
1755 [OP_PUTPUBFH] = {
1756 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1757 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1758 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
1759 .op_name = "OP_PUTPUBFH",
1760 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1761 },
1762 [OP_PUTROOTFH] = {
1763 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1764 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1765 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
1766 .op_name = "OP_PUTROOTFH",
1767 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1768 },
1769 [OP_READ] = {
1770 .op_func = (nfsd4op_func)nfsd4_read,
1771 .op_name = "OP_READ",
1772 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1773 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1774 },
1775 [OP_READDIR] = {
1776 .op_func = (nfsd4op_func)nfsd4_readdir,
1777 .op_name = "OP_READDIR",
1778 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1779 },
1780 [OP_READLINK] = {
1781 .op_func = (nfsd4op_func)nfsd4_readlink,
1782 .op_name = "OP_READLINK",
1783 },
1784 [OP_REMOVE] = {
1785 .op_func = (nfsd4op_func)nfsd4_remove,
1786 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1787 .op_name = "OP_REMOVE",
1788 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1789 },
1790 [OP_RENAME] = {
1791 .op_func = (nfsd4op_func)nfsd4_rename,
1792 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1793 .op_name = "OP_RENAME",
1794 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1795 },
1796 [OP_RENEW] = {
1797 .op_func = (nfsd4op_func)nfsd4_renew,
1798 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1799 | OP_MODIFIES_SOMETHING,
1800 .op_name = "OP_RENEW",
1801 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1802
1803 },
1804 [OP_RESTOREFH] = {
1805 .op_func = (nfsd4op_func)nfsd4_restorefh,
1806 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1807 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1808 .op_name = "OP_RESTOREFH",
1809 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1810 },
1811 [OP_SAVEFH] = {
1812 .op_func = (nfsd4op_func)nfsd4_savefh,
1813 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1814 .op_name = "OP_SAVEFH",
1815 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1816 },
1817 [OP_SECINFO] = {
1818 .op_func = (nfsd4op_func)nfsd4_secinfo,
1819 .op_flags = OP_HANDLES_WRONGSEC,
1820 .op_name = "OP_SECINFO",
1821 },
1822 [OP_SETATTR] = {
1823 .op_func = (nfsd4op_func)nfsd4_setattr,
1824 .op_name = "OP_SETATTR",
1825 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1826 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1827 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1828 },
1829 [OP_SETCLIENTID] = {
1830 .op_func = (nfsd4op_func)nfsd4_setclientid,
1831 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1832 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1833 .op_name = "OP_SETCLIENTID",
1834 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1835 },
1836 [OP_SETCLIENTID_CONFIRM] = {
1837 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1838 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1839 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1840 .op_name = "OP_SETCLIENTID_CONFIRM",
1841 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1842 },
1843 [OP_VERIFY] = {
1844 .op_func = (nfsd4op_func)nfsd4_verify,
1845 .op_name = "OP_VERIFY",
1846 },
1847 [OP_WRITE] = {
1848 .op_func = (nfsd4op_func)nfsd4_write,
1849 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1850 .op_name = "OP_WRITE",
1851 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1852 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1853 },
1854 [OP_RELEASE_LOCKOWNER] = {
1855 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1856 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1857 | OP_MODIFIES_SOMETHING,
1858 .op_name = "OP_RELEASE_LOCKOWNER",
1859 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1860 },
1861
1862 /* NFSv4.1 operations */
1863 [OP_EXCHANGE_ID] = {
1864 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1865 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1866 | OP_MODIFIES_SOMETHING,
1867 .op_name = "OP_EXCHANGE_ID",
1868 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1869 },
1870 [OP_BACKCHANNEL_CTL] = {
1871 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1872 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1873 .op_name = "OP_BACKCHANNEL_CTL",
1874 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1875 },
1876 [OP_BIND_CONN_TO_SESSION] = {
1877 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1878 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1879 | OP_MODIFIES_SOMETHING,
1880 .op_name = "OP_BIND_CONN_TO_SESSION",
1881 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1882 },
1883 [OP_CREATE_SESSION] = {
1884 .op_func = (nfsd4op_func)nfsd4_create_session,
1885 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1886 | OP_MODIFIES_SOMETHING,
1887 .op_name = "OP_CREATE_SESSION",
1888 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1889 },
1890 [OP_DESTROY_SESSION] = {
1891 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1892 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1893 | OP_MODIFIES_SOMETHING,
1894 .op_name = "OP_DESTROY_SESSION",
1895 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1896 },
1897 [OP_SEQUENCE] = {
1898 .op_func = (nfsd4op_func)nfsd4_sequence,
1899 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1900 .op_name = "OP_SEQUENCE",
1901 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
1902 },
1903 [OP_DESTROY_CLIENTID] = {
1904 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1905 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1906 | OP_MODIFIES_SOMETHING,
1907 .op_name = "OP_DESTROY_CLIENTID",
1908 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1909 },
1910 [OP_RECLAIM_COMPLETE] = {
1911 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1912 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1913 .op_name = "OP_RECLAIM_COMPLETE",
1914 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1915 },
1916 [OP_SECINFO_NO_NAME] = {
1917 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1918 .op_flags = OP_HANDLES_WRONGSEC,
1919 .op_name = "OP_SECINFO_NO_NAME",
1920 },
1921 [OP_TEST_STATEID] = {
1922 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1923 .op_flags = ALLOWED_WITHOUT_FH,
1924 .op_name = "OP_TEST_STATEID",
1925 },
1926 [OP_FREE_STATEID] = {
1927 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1928 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1929 .op_name = "OP_FREE_STATEID",
1930 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1931 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1932 },
1933
1934 /* NFSv4.2 operations */
1935 [OP_SEEK] = {
1936 .op_func = (nfsd4op_func)nfsd4_seek,
1937 .op_name = "OP_SEEK",
1938 },
1939 };
1940
1941 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
1942 {
1943 struct nfsd4_operation *opdesc;
1944 nfsd4op_rsize estimator;
1945
1946 if (op->opnum == OP_ILLEGAL)
1947 return op_encode_hdr_size * sizeof(__be32);
1948 opdesc = OPDESC(op);
1949 estimator = opdesc->op_rsize_bop;
1950 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
1951 }
1952
1953 void warn_on_nonidempotent_op(struct nfsd4_op *op)
1954 {
1955 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
1956 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
1957 op->opnum, nfsd4_op_name(op->opnum));
1958 WARN_ON_ONCE(1);
1959 }
1960 }
1961
1962 static const char *nfsd4_op_name(unsigned opnum)
1963 {
1964 if (opnum < ARRAY_SIZE(nfsd4_ops))
1965 return nfsd4_ops[opnum].op_name;
1966 return "unknown_operation";
1967 }
1968
1969 #define nfsd4_voidres nfsd4_voidargs
1970 struct nfsd4_voidargs { int dummy; };
1971
1972 static struct svc_procedure nfsd_procedures4[2] = {
1973 [NFSPROC4_NULL] = {
1974 .pc_func = (svc_procfunc) nfsd4_proc_null,
1975 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1976 .pc_argsize = sizeof(struct nfsd4_voidargs),
1977 .pc_ressize = sizeof(struct nfsd4_voidres),
1978 .pc_cachetype = RC_NOCACHE,
1979 .pc_xdrressize = 1,
1980 },
1981 [NFSPROC4_COMPOUND] = {
1982 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1983 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1984 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1985 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1986 .pc_ressize = sizeof(struct nfsd4_compoundres),
1987 .pc_release = nfsd4_release_compoundargs,
1988 .pc_cachetype = RC_NOCACHE,
1989 .pc_xdrressize = NFSD_BUFSIZE/4,
1990 },
1991 };
1992
1993 struct svc_version nfsd_version4 = {
1994 .vs_vers = 4,
1995 .vs_nproc = 2,
1996 .vs_proc = nfsd_procedures4,
1997 .vs_dispatch = nfsd_dispatch,
1998 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1999 .vs_rpcb_optnl = 1,
2000 };
2001
2002 /*
2003 * Local variables:
2004 * c-basic-offset: 8
2005 * End:
2006 */
Linux with added FPC-III support