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nfsd4: warn on open failure after create
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4proc.c
1 /*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42
43 #define NFSDDBG_FACILITY NFSDDBG_PROC
44
45 static u32 nfsd_attrmask[] = {
46 NFSD_WRITEABLE_ATTRS_WORD0,
47 NFSD_WRITEABLE_ATTRS_WORD1,
48 NFSD_WRITEABLE_ATTRS_WORD2
49 };
50
51 static u32 nfsd41_ex_attrmask[] = {
52 NFSD_SUPPATTR_EXCLCREAT_WORD0,
53 NFSD_SUPPATTR_EXCLCREAT_WORD1,
54 NFSD_SUPPATTR_EXCLCREAT_WORD2
55 };
56
57 static __be32
58 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
59 u32 *bmval, u32 *writable)
60 {
61 struct dentry *dentry = cstate->current_fh.fh_dentry;
62
63 /*
64 * Check about attributes are supported by the NFSv4 server or not.
65 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
66 */
67 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
68 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
69 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
70 return nfserr_attrnotsupp;
71
72 /*
73 * Check FATTR4_WORD0_ACL can be supported
74 * in current environment or not.
75 */
76 if (bmval[0] & FATTR4_WORD0_ACL) {
77 if (!IS_POSIXACL(dentry->d_inode))
78 return nfserr_attrnotsupp;
79 }
80
81 /*
82 * According to spec, read-only attributes return ERR_INVAL.
83 */
84 if (writable) {
85 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
86 (bmval[2] & ~writable[2]))
87 return nfserr_inval;
88 }
89
90 return nfs_ok;
91 }
92
93 static __be32
94 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
95 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
96 {
97 __be32 status = nfs_ok;
98
99 if (open->op_create == NFS4_OPEN_CREATE) {
100 if (open->op_createmode == NFS4_CREATE_UNCHECKED
101 || open->op_createmode == NFS4_CREATE_GUARDED)
102 status = check_attr_support(rqstp, cstate,
103 open->op_bmval, nfsd_attrmask);
104 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
105 status = check_attr_support(rqstp, cstate,
106 open->op_bmval, nfsd41_ex_attrmask);
107 }
108
109 return status;
110 }
111
112 static int
113 is_create_with_attrs(struct nfsd4_open *open)
114 {
115 return open->op_create == NFS4_OPEN_CREATE
116 && (open->op_createmode == NFS4_CREATE_UNCHECKED
117 || open->op_createmode == NFS4_CREATE_GUARDED
118 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
119 }
120
121 /*
122 * if error occurs when setting the acl, just clear the acl bit
123 * in the returned attr bitmap.
124 */
125 static void
126 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
127 struct nfs4_acl *acl, u32 *bmval)
128 {
129 __be32 status;
130
131 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
132 if (status)
133 /*
134 * We should probably fail the whole open at this point,
135 * but we've already created the file, so it's too late;
136 * So this seems the least of evils:
137 */
138 bmval[0] &= ~FATTR4_WORD0_ACL;
139 }
140
141 static inline void
142 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
143 {
144 fh_put(dst);
145 dget(src->fh_dentry);
146 if (src->fh_export)
147 cache_get(&src->fh_export->h);
148 *dst = *src;
149 }
150
151 static __be32
152 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
153 {
154 __be32 status;
155
156 if (open->op_truncate &&
157 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
158 return nfserr_inval;
159
160 accmode |= NFSD_MAY_READ_IF_EXEC;
161
162 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
163 accmode |= NFSD_MAY_READ;
164 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
165 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
166 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
167 accmode |= NFSD_MAY_WRITE;
168
169 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
170
171 return status;
172 }
173
174 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
175 {
176 umode_t mode = fh->fh_dentry->d_inode->i_mode;
177
178 if (S_ISREG(mode))
179 return nfs_ok;
180 if (S_ISDIR(mode))
181 return nfserr_isdir;
182 /*
183 * Using err_symlink as our catch-all case may look odd; but
184 * there's no other obvious error for this case in 4.0, and we
185 * happen to know that it will cause the linux v4 client to do
186 * the right thing on attempts to open something other than a
187 * regular file.
188 */
189 return nfserr_symlink;
190 }
191
192 static __be32
193 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
194 {
195 struct svc_fh resfh;
196 __be32 status;
197
198 fh_init(&resfh, NFS4_FHSIZE);
199 open->op_truncate = 0;
200
201 if (open->op_create) {
202 /* FIXME: check session persistence and pnfs flags.
203 * The nfsv4.1 spec requires the following semantics:
204 *
205 * Persistent | pNFS | Server REQUIRED | Client Allowed
206 * Reply Cache | server | |
207 * -------------+--------+-----------------+--------------------
208 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
209 * | | | (SHOULD)
210 * | | and EXCLUSIVE4 | or EXCLUSIVE4
211 * | | | (SHOULD NOT)
212 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
213 * yes | no | GUARDED4 | GUARDED4
214 * yes | yes | GUARDED4 | GUARDED4
215 */
216
217 /*
218 * Note: create modes (UNCHECKED,GUARDED...) are the same
219 * in NFSv4 as in v3 except EXCLUSIVE4_1.
220 */
221 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
222 open->op_fname.len, &open->op_iattr,
223 &resfh, open->op_createmode,
224 (u32 *)open->op_verf.data,
225 &open->op_truncate, &open->op_created);
226
227 /*
228 * Following rfc 3530 14.2.16, use the returned bitmask
229 * to indicate which attributes we used to store the
230 * verifier:
231 */
232 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
233 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
234 FATTR4_WORD1_TIME_MODIFY);
235 } else {
236 status = nfsd_lookup(rqstp, current_fh,
237 open->op_fname.data, open->op_fname.len, &resfh);
238 fh_unlock(current_fh);
239 if (status)
240 goto out;
241 status = nfsd_check_obj_isreg(&resfh);
242 }
243 if (status)
244 goto out;
245
246 if (is_create_with_attrs(open) && open->op_acl != NULL)
247 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
248
249 set_change_info(&open->op_cinfo, current_fh);
250 fh_dup2(current_fh, &resfh);
251
252 /* set reply cache */
253 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
254 &resfh.fh_handle);
255 if (!open->op_created)
256 status = do_open_permission(rqstp, current_fh, open,
257 NFSD_MAY_NOP);
258
259 out:
260 fh_put(&resfh);
261 return status;
262 }
263
264 static __be32
265 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
266 {
267 __be32 status;
268
269 /* Only reclaims from previously confirmed clients are valid */
270 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
271 return status;
272
273 /* We don't know the target directory, and therefore can not
274 * set the change info
275 */
276
277 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
278
279 /* set replay cache */
280 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
281 &current_fh->fh_handle);
282
283 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
284 (open->op_iattr.ia_size == 0);
285
286 status = do_open_permission(rqstp, current_fh, open,
287 NFSD_MAY_OWNER_OVERRIDE);
288
289 return status;
290 }
291
292 static void
293 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
294 {
295 struct nfsd4_sessionid *sid =
296 (struct nfsd4_sessionid *)session->se_sessionid.data;
297
298 clid->cl_boot = sid->clientid.cl_boot;
299 clid->cl_id = sid->clientid.cl_id;
300 }
301
302 static __be32
303 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
304 struct nfsd4_open *open)
305 {
306 __be32 status;
307 struct nfsd4_compoundres *resp;
308
309 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
310 (int)open->op_fname.len, open->op_fname.data,
311 open->op_openowner);
312
313 /* This check required by spec. */
314 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
315 return nfserr_inval;
316
317 /* We don't yet support WANT bits: */
318 open->op_share_access &= NFS4_SHARE_ACCESS_MASK;
319
320 open->op_created = 0;
321 /*
322 * RFC5661 18.51.3
323 * Before RECLAIM_COMPLETE done, server should deny new lock
324 */
325 if (nfsd4_has_session(cstate) &&
326 !cstate->session->se_client->cl_firststate &&
327 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
328 return nfserr_grace;
329
330 if (nfsd4_has_session(cstate))
331 copy_clientid(&open->op_clientid, cstate->session);
332
333 nfs4_lock_state();
334
335 /* check seqid for replay. set nfs4_owner */
336 resp = rqstp->rq_resp;
337 status = nfsd4_process_open1(&resp->cstate, open);
338 if (status == nfserr_replay_me) {
339 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
340 fh_put(&cstate->current_fh);
341 fh_copy_shallow(&cstate->current_fh.fh_handle,
342 &rp->rp_openfh);
343 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
344 if (status)
345 dprintk("nfsd4_open: replay failed"
346 " restoring previous filehandle\n");
347 else
348 status = nfserr_replay_me;
349 }
350 if (status)
351 goto out;
352
353 status = nfsd4_check_open_attributes(rqstp, cstate, open);
354 if (status)
355 goto out;
356
357 /* Openowner is now set, so sequence id will get bumped. Now we need
358 * these checks before we do any creates: */
359 status = nfserr_grace;
360 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
361 goto out;
362 status = nfserr_no_grace;
363 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
364 goto out;
365
366 switch (open->op_claim_type) {
367 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
368 case NFS4_OPEN_CLAIM_NULL:
369 /*
370 * (1) set CURRENT_FH to the file being opened,
371 * creating it if necessary, (2) set open->op_cinfo,
372 * (3) set open->op_truncate if the file is to be
373 * truncated after opening, (4) do permission checking.
374 */
375 status = do_open_lookup(rqstp, &cstate->current_fh,
376 open);
377 if (status)
378 goto out;
379 break;
380 case NFS4_OPEN_CLAIM_PREVIOUS:
381 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
382 /*
383 * The CURRENT_FH is already set to the file being
384 * opened. (1) set open->op_cinfo, (2) set
385 * open->op_truncate if the file is to be truncated
386 * after opening, (3) do permission checking.
387 */
388 status = do_open_fhandle(rqstp, &cstate->current_fh,
389 open);
390 if (status)
391 goto out;
392 break;
393 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
394 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
395 dprintk("NFSD: unsupported OPEN claim type %d\n",
396 open->op_claim_type);
397 status = nfserr_notsupp;
398 goto out;
399 default:
400 dprintk("NFSD: Invalid OPEN claim type %d\n",
401 open->op_claim_type);
402 status = nfserr_inval;
403 goto out;
404 }
405 /*
406 * nfsd4_process_open2() does the actual opening of the file. If
407 * successful, it (1) truncates the file if open->op_truncate was
408 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
409 */
410 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
411 WARN_ON(status && open->op_created);
412 out:
413 nfsd4_cleanup_open_state(open, status);
414 if (open->op_openowner)
415 cstate->replay_owner = &open->op_openowner->oo_owner;
416 else
417 nfs4_unlock_state();
418 return status;
419 }
420
421 /*
422 * filehandle-manipulating ops.
423 */
424 static __be32
425 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
426 struct svc_fh **getfh)
427 {
428 if (!cstate->current_fh.fh_dentry)
429 return nfserr_nofilehandle;
430
431 *getfh = &cstate->current_fh;
432 return nfs_ok;
433 }
434
435 static __be32
436 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
437 struct nfsd4_putfh *putfh)
438 {
439 fh_put(&cstate->current_fh);
440 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
441 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
442 putfh->pf_fhlen);
443 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
444 }
445
446 static __be32
447 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
448 void *arg)
449 {
450 __be32 status;
451
452 fh_put(&cstate->current_fh);
453 status = exp_pseudoroot(rqstp, &cstate->current_fh);
454 return status;
455 }
456
457 static __be32
458 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
459 void *arg)
460 {
461 if (!cstate->save_fh.fh_dentry)
462 return nfserr_restorefh;
463
464 fh_dup2(&cstate->current_fh, &cstate->save_fh);
465 return nfs_ok;
466 }
467
468 static __be32
469 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
470 void *arg)
471 {
472 if (!cstate->current_fh.fh_dentry)
473 return nfserr_nofilehandle;
474
475 fh_dup2(&cstate->save_fh, &cstate->current_fh);
476 return nfs_ok;
477 }
478
479 /*
480 * misc nfsv4 ops
481 */
482 static __be32
483 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
484 struct nfsd4_access *access)
485 {
486 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
487 return nfserr_inval;
488
489 access->ac_resp_access = access->ac_req_access;
490 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
491 &access->ac_supported);
492 }
493
494 static __be32
495 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
496 struct nfsd4_commit *commit)
497 {
498 u32 *p = (u32 *)commit->co_verf.data;
499 *p++ = nfssvc_boot.tv_sec;
500 *p++ = nfssvc_boot.tv_usec;
501
502 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
503 commit->co_count);
504 }
505
506 static __be32
507 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
508 struct nfsd4_create *create)
509 {
510 struct svc_fh resfh;
511 __be32 status;
512 dev_t rdev;
513
514 fh_init(&resfh, NFS4_FHSIZE);
515
516 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
517 NFSD_MAY_CREATE);
518 if (status)
519 return status;
520
521 status = check_attr_support(rqstp, cstate, create->cr_bmval,
522 nfsd_attrmask);
523 if (status)
524 return status;
525
526 switch (create->cr_type) {
527 case NF4LNK:
528 /* ugh! we have to null-terminate the linktext, or
529 * vfs_symlink() will choke. it is always safe to
530 * null-terminate by brute force, since at worst we
531 * will overwrite the first byte of the create namelen
532 * in the XDR buffer, which has already been extracted
533 * during XDR decode.
534 */
535 create->cr_linkname[create->cr_linklen] = 0;
536
537 status = nfsd_symlink(rqstp, &cstate->current_fh,
538 create->cr_name, create->cr_namelen,
539 create->cr_linkname, create->cr_linklen,
540 &resfh, &create->cr_iattr);
541 break;
542
543 case NF4BLK:
544 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
545 if (MAJOR(rdev) != create->cr_specdata1 ||
546 MINOR(rdev) != create->cr_specdata2)
547 return nfserr_inval;
548 status = nfsd_create(rqstp, &cstate->current_fh,
549 create->cr_name, create->cr_namelen,
550 &create->cr_iattr, S_IFBLK, rdev, &resfh);
551 break;
552
553 case NF4CHR:
554 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
555 if (MAJOR(rdev) != create->cr_specdata1 ||
556 MINOR(rdev) != create->cr_specdata2)
557 return nfserr_inval;
558 status = nfsd_create(rqstp, &cstate->current_fh,
559 create->cr_name, create->cr_namelen,
560 &create->cr_iattr,S_IFCHR, rdev, &resfh);
561 break;
562
563 case NF4SOCK:
564 status = nfsd_create(rqstp, &cstate->current_fh,
565 create->cr_name, create->cr_namelen,
566 &create->cr_iattr, S_IFSOCK, 0, &resfh);
567 break;
568
569 case NF4FIFO:
570 status = nfsd_create(rqstp, &cstate->current_fh,
571 create->cr_name, create->cr_namelen,
572 &create->cr_iattr, S_IFIFO, 0, &resfh);
573 break;
574
575 case NF4DIR:
576 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
577 status = nfsd_create(rqstp, &cstate->current_fh,
578 create->cr_name, create->cr_namelen,
579 &create->cr_iattr, S_IFDIR, 0, &resfh);
580 break;
581
582 default:
583 status = nfserr_badtype;
584 }
585
586 if (status)
587 goto out;
588
589 if (create->cr_acl != NULL)
590 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
591 create->cr_bmval);
592
593 fh_unlock(&cstate->current_fh);
594 set_change_info(&create->cr_cinfo, &cstate->current_fh);
595 fh_dup2(&cstate->current_fh, &resfh);
596 out:
597 fh_put(&resfh);
598 return status;
599 }
600
601 static __be32
602 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
603 struct nfsd4_getattr *getattr)
604 {
605 __be32 status;
606
607 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
608 if (status)
609 return status;
610
611 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
612 return nfserr_inval;
613
614 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
615 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
616 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
617
618 getattr->ga_fhp = &cstate->current_fh;
619 return nfs_ok;
620 }
621
622 static __be32
623 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
624 struct nfsd4_link *link)
625 {
626 __be32 status = nfserr_nofilehandle;
627
628 if (!cstate->save_fh.fh_dentry)
629 return status;
630 status = nfsd_link(rqstp, &cstate->current_fh,
631 link->li_name, link->li_namelen, &cstate->save_fh);
632 if (!status)
633 set_change_info(&link->li_cinfo, &cstate->current_fh);
634 return status;
635 }
636
637 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
638 {
639 struct svc_fh tmp_fh;
640 __be32 ret;
641
642 fh_init(&tmp_fh, NFS4_FHSIZE);
643 ret = exp_pseudoroot(rqstp, &tmp_fh);
644 if (ret)
645 return ret;
646 if (tmp_fh.fh_dentry == fh->fh_dentry) {
647 fh_put(&tmp_fh);
648 return nfserr_noent;
649 }
650 fh_put(&tmp_fh);
651 return nfsd_lookup(rqstp, fh, "..", 2, fh);
652 }
653
654 static __be32
655 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
656 void *arg)
657 {
658 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
659 }
660
661 static __be32
662 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
663 struct nfsd4_lookup *lookup)
664 {
665 return nfsd_lookup(rqstp, &cstate->current_fh,
666 lookup->lo_name, lookup->lo_len,
667 &cstate->current_fh);
668 }
669
670 static __be32
671 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
672 struct nfsd4_read *read)
673 {
674 __be32 status;
675
676 /* no need to check permission - this will be done in nfsd_read() */
677
678 read->rd_filp = NULL;
679 if (read->rd_offset >= OFFSET_MAX)
680 return nfserr_inval;
681
682 nfs4_lock_state();
683 /* check stateid */
684 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
685 RD_STATE, &read->rd_filp))) {
686 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
687 goto out;
688 }
689 if (read->rd_filp)
690 get_file(read->rd_filp);
691 status = nfs_ok;
692 out:
693 nfs4_unlock_state();
694 read->rd_rqstp = rqstp;
695 read->rd_fhp = &cstate->current_fh;
696 return status;
697 }
698
699 static __be32
700 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
701 struct nfsd4_readdir *readdir)
702 {
703 u64 cookie = readdir->rd_cookie;
704 static const nfs4_verifier zeroverf;
705
706 /* no need to check permission - this will be done in nfsd_readdir() */
707
708 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
709 return nfserr_inval;
710
711 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
712 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
713 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
714
715 if ((cookie == 1) || (cookie == 2) ||
716 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
717 return nfserr_bad_cookie;
718
719 readdir->rd_rqstp = rqstp;
720 readdir->rd_fhp = &cstate->current_fh;
721 return nfs_ok;
722 }
723
724 static __be32
725 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726 struct nfsd4_readlink *readlink)
727 {
728 readlink->rl_rqstp = rqstp;
729 readlink->rl_fhp = &cstate->current_fh;
730 return nfs_ok;
731 }
732
733 static __be32
734 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
735 struct nfsd4_remove *remove)
736 {
737 __be32 status;
738
739 if (locks_in_grace())
740 return nfserr_grace;
741 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
742 remove->rm_name, remove->rm_namelen);
743 if (!status) {
744 fh_unlock(&cstate->current_fh);
745 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
746 }
747 return status;
748 }
749
750 static __be32
751 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 struct nfsd4_rename *rename)
753 {
754 __be32 status = nfserr_nofilehandle;
755
756 if (!cstate->save_fh.fh_dentry)
757 return status;
758 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
759 & NFSEXP_NOSUBTREECHECK))
760 return nfserr_grace;
761 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
762 rename->rn_snamelen, &cstate->current_fh,
763 rename->rn_tname, rename->rn_tnamelen);
764
765 /* the underlying filesystem returns different error's than required
766 * by NFSv4. both save_fh and current_fh have been verified.. */
767 if (status == nfserr_isdir)
768 status = nfserr_exist;
769 else if ((status == nfserr_notdir) &&
770 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
771 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
772 status = nfserr_exist;
773
774 if (!status) {
775 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
776 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
777 }
778 return status;
779 }
780
781 static __be32
782 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
783 struct nfsd4_secinfo *secinfo)
784 {
785 struct svc_fh resfh;
786 struct svc_export *exp;
787 struct dentry *dentry;
788 __be32 err;
789
790 fh_init(&resfh, NFS4_FHSIZE);
791 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
792 if (err)
793 return err;
794 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
795 secinfo->si_name, secinfo->si_namelen,
796 &exp, &dentry);
797 if (err)
798 return err;
799 if (dentry->d_inode == NULL) {
800 exp_put(exp);
801 err = nfserr_noent;
802 } else
803 secinfo->si_exp = exp;
804 dput(dentry);
805 if (cstate->minorversion)
806 /* See rfc 5661 section 2.6.3.1.1.8 */
807 fh_put(&cstate->current_fh);
808 return err;
809 }
810
811 static __be32
812 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
813 struct nfsd4_secinfo_no_name *sin)
814 {
815 __be32 err;
816
817 switch (sin->sin_style) {
818 case NFS4_SECINFO_STYLE4_CURRENT_FH:
819 break;
820 case NFS4_SECINFO_STYLE4_PARENT:
821 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
822 if (err)
823 return err;
824 break;
825 default:
826 return nfserr_inval;
827 }
828 exp_get(cstate->current_fh.fh_export);
829 sin->sin_exp = cstate->current_fh.fh_export;
830 fh_put(&cstate->current_fh);
831 return nfs_ok;
832 }
833
834 static __be32
835 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
836 struct nfsd4_setattr *setattr)
837 {
838 __be32 status = nfs_ok;
839
840 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
841 nfs4_lock_state();
842 status = nfs4_preprocess_stateid_op(cstate,
843 &setattr->sa_stateid, WR_STATE, NULL);
844 nfs4_unlock_state();
845 if (status) {
846 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
847 return status;
848 }
849 }
850 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
851 if (status)
852 return status;
853 status = nfs_ok;
854
855 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
856 nfsd_attrmask);
857 if (status)
858 goto out;
859
860 if (setattr->sa_acl != NULL)
861 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
862 setattr->sa_acl);
863 if (status)
864 goto out;
865 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
866 0, (time_t)0);
867 out:
868 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
869 return status;
870 }
871
872 static __be32
873 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
874 struct nfsd4_write *write)
875 {
876 stateid_t *stateid = &write->wr_stateid;
877 struct file *filp = NULL;
878 u32 *p;
879 __be32 status = nfs_ok;
880 unsigned long cnt;
881
882 /* no need to check permission - this will be done in nfsd_write() */
883
884 if (write->wr_offset >= OFFSET_MAX)
885 return nfserr_inval;
886
887 nfs4_lock_state();
888 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
889 if (filp)
890 get_file(filp);
891 nfs4_unlock_state();
892
893 if (status) {
894 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
895 return status;
896 }
897
898 cnt = write->wr_buflen;
899 write->wr_how_written = write->wr_stable_how;
900 p = (u32 *)write->wr_verifier.data;
901 *p++ = nfssvc_boot.tv_sec;
902 *p++ = nfssvc_boot.tv_usec;
903
904 status = nfsd_write(rqstp, &cstate->current_fh, filp,
905 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
906 &cnt, &write->wr_how_written);
907 if (filp)
908 fput(filp);
909
910 write->wr_bytes_written = cnt;
911
912 return status;
913 }
914
915 /* This routine never returns NFS_OK! If there are no other errors, it
916 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
917 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
918 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
919 */
920 static __be32
921 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
922 struct nfsd4_verify *verify)
923 {
924 __be32 *buf, *p;
925 int count;
926 __be32 status;
927
928 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
929 if (status)
930 return status;
931
932 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
933 if (status)
934 return status;
935
936 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
937 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
938 return nfserr_inval;
939 if (verify->ve_attrlen & 3)
940 return nfserr_inval;
941
942 /* count in words:
943 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
944 */
945 count = 4 + (verify->ve_attrlen >> 2);
946 buf = kmalloc(count << 2, GFP_KERNEL);
947 if (!buf)
948 return nfserr_jukebox;
949
950 status = nfsd4_encode_fattr(&cstate->current_fh,
951 cstate->current_fh.fh_export,
952 cstate->current_fh.fh_dentry, buf,
953 &count, verify->ve_bmval,
954 rqstp, 0);
955
956 /* this means that nfsd4_encode_fattr() ran out of space */
957 if (status == nfserr_resource && count == 0)
958 status = nfserr_not_same;
959 if (status)
960 goto out_kfree;
961
962 /* skip bitmap */
963 p = buf + 1 + ntohl(buf[0]);
964 status = nfserr_not_same;
965 if (ntohl(*p++) != verify->ve_attrlen)
966 goto out_kfree;
967 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
968 status = nfserr_same;
969
970 out_kfree:
971 kfree(buf);
972 return status;
973 }
974
975 static __be32
976 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
977 struct nfsd4_verify *verify)
978 {
979 __be32 status;
980
981 status = _nfsd4_verify(rqstp, cstate, verify);
982 return status == nfserr_not_same ? nfs_ok : status;
983 }
984
985 static __be32
986 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
987 struct nfsd4_verify *verify)
988 {
989 __be32 status;
990
991 status = _nfsd4_verify(rqstp, cstate, verify);
992 return status == nfserr_same ? nfs_ok : status;
993 }
994
995 /*
996 * NULL call.
997 */
998 static __be32
999 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1000 {
1001 return nfs_ok;
1002 }
1003
1004 static inline void nfsd4_increment_op_stats(u32 opnum)
1005 {
1006 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1007 nfsdstats.nfs4_opcount[opnum]++;
1008 }
1009
1010 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1011 void *);
1012 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1013
1014 enum nfsd4_op_flags {
1015 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1016 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1017 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1018 /* For rfc 5661 section 2.6.3.1.1: */
1019 OP_HANDLES_WRONGSEC = 1 << 3,
1020 OP_IS_PUTFH_LIKE = 1 << 4,
1021 /*
1022 * These are the ops whose result size we estimate before
1023 * encoding, to avoid performing an op then not being able to
1024 * respond or cache a response. This includes writes and setattrs
1025 * as well as the operations usually called "nonidempotent":
1026 */
1027 OP_MODIFIES_SOMETHING = 1 << 5,
1028 /*
1029 * Cache compounds containing these ops in the xid-based drc:
1030 * We use the DRC for compounds containing non-idempotent
1031 * operations, *except* those that are 4.1-specific (since
1032 * sessions provide their own EOS), and except for stateful
1033 * operations other than setclientid and setclientid_confirm
1034 * (since sequence numbers provide EOS for open, lock, etc in
1035 * the v4.0 case).
1036 */
1037 OP_CACHEME = 1 << 6,
1038 };
1039
1040 struct nfsd4_operation {
1041 nfsd4op_func op_func;
1042 u32 op_flags;
1043 char *op_name;
1044 /* Try to get response size before operation */
1045 nfsd4op_rsize op_rsize_bop;
1046 };
1047
1048 static struct nfsd4_operation nfsd4_ops[];
1049
1050 static const char *nfsd4_op_name(unsigned opnum);
1051
1052 /*
1053 * Enforce NFSv4.1 COMPOUND ordering rules:
1054 *
1055 * Also note, enforced elsewhere:
1056 * - SEQUENCE other than as first op results in
1057 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1058 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1059 * (Enforced in nfsd4_bind_conn_to_session().)
1060 * - DESTROY_SESSION must be the final operation in a compound, if
1061 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1062 * (Enforced in nfsd4_destroy_session().)
1063 */
1064 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1065 {
1066 struct nfsd4_op *op = &args->ops[0];
1067
1068 /* These ordering requirements don't apply to NFSv4.0: */
1069 if (args->minorversion == 0)
1070 return nfs_ok;
1071 /* This is weird, but OK, not our problem: */
1072 if (args->opcnt == 0)
1073 return nfs_ok;
1074 if (op->status == nfserr_op_illegal)
1075 return nfs_ok;
1076 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1077 return nfserr_op_not_in_session;
1078 if (op->opnum == OP_SEQUENCE)
1079 return nfs_ok;
1080 if (args->opcnt != 1)
1081 return nfserr_not_only_op;
1082 return nfs_ok;
1083 }
1084
1085 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1086 {
1087 return &nfsd4_ops[op->opnum];
1088 }
1089
1090 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1091 {
1092 return OPDESC(op)->op_flags & OP_CACHEME;
1093 }
1094
1095 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1096 {
1097 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1098 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1099 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1100 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1101 struct nfsd4_operation *thisd;
1102 struct nfsd4_operation *nextd;
1103
1104 thisd = OPDESC(this);
1105 /*
1106 * Most ops check wronsec on our own; only the putfh-like ops
1107 * have special rules.
1108 */
1109 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1110 return false;
1111 /*
1112 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1113 * put-filehandle operation if we're not going to use the
1114 * result:
1115 */
1116 if (argp->opcnt == resp->opcnt)
1117 return false;
1118
1119 nextd = OPDESC(next);
1120 /*
1121 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1122 * errors themselves as necessary; others should check for them
1123 * now:
1124 */
1125 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1126 }
1127
1128 /*
1129 * COMPOUND call.
1130 */
1131 static __be32
1132 nfsd4_proc_compound(struct svc_rqst *rqstp,
1133 struct nfsd4_compoundargs *args,
1134 struct nfsd4_compoundres *resp)
1135 {
1136 struct nfsd4_op *op;
1137 struct nfsd4_operation *opdesc;
1138 struct nfsd4_compound_state *cstate = &resp->cstate;
1139 int slack_bytes;
1140 u32 plen = 0;
1141 __be32 status;
1142
1143 resp->xbuf = &rqstp->rq_res;
1144 resp->p = rqstp->rq_res.head[0].iov_base +
1145 rqstp->rq_res.head[0].iov_len;
1146 resp->tagp = resp->p;
1147 /* reserve space for: taglen, tag, and opcnt */
1148 resp->p += 2 + XDR_QUADLEN(args->taglen);
1149 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1150 resp->taglen = args->taglen;
1151 resp->tag = args->tag;
1152 resp->opcnt = 0;
1153 resp->rqstp = rqstp;
1154 resp->cstate.minorversion = args->minorversion;
1155 resp->cstate.replay_owner = NULL;
1156 resp->cstate.session = NULL;
1157 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1158 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1159 /*
1160 * Don't use the deferral mechanism for NFSv4; compounds make it
1161 * too hard to avoid non-idempotency problems.
1162 */
1163 rqstp->rq_usedeferral = 0;
1164
1165 /*
1166 * According to RFC3010, this takes precedence over all other errors.
1167 */
1168 status = nfserr_minor_vers_mismatch;
1169 if (args->minorversion > nfsd_supported_minorversion)
1170 goto out;
1171
1172 status = nfs41_check_op_ordering(args);
1173 if (status) {
1174 op = &args->ops[0];
1175 op->status = status;
1176 goto encode_op;
1177 }
1178
1179 while (!status && resp->opcnt < args->opcnt) {
1180 op = &args->ops[resp->opcnt++];
1181
1182 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1183 resp->opcnt, args->opcnt, op->opnum,
1184 nfsd4_op_name(op->opnum));
1185 /*
1186 * The XDR decode routines may have pre-set op->status;
1187 * for example, if there is a miscellaneous XDR error
1188 * it will be set to nfserr_bad_xdr.
1189 */
1190 if (op->status)
1191 goto encode_op;
1192
1193 /* We must be able to encode a successful response to
1194 * this operation, with enough room left over to encode a
1195 * failed response to the next operation. If we don't
1196 * have enough room, fail with ERR_RESOURCE.
1197 */
1198 slack_bytes = (char *)resp->end - (char *)resp->p;
1199 if (slack_bytes < COMPOUND_SLACK_SPACE
1200 + COMPOUND_ERR_SLACK_SPACE) {
1201 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1202 op->status = nfserr_resource;
1203 goto encode_op;
1204 }
1205
1206 opdesc = OPDESC(op);
1207
1208 if (!cstate->current_fh.fh_dentry) {
1209 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1210 op->status = nfserr_nofilehandle;
1211 goto encode_op;
1212 }
1213 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1214 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1215 op->status = nfserr_moved;
1216 goto encode_op;
1217 }
1218
1219 /* If op is non-idempotent */
1220 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1221 plen = opdesc->op_rsize_bop(rqstp, op);
1222 op->status = nfsd4_check_resp_size(resp, plen);
1223 }
1224
1225 if (op->status)
1226 goto encode_op;
1227
1228 if (opdesc->op_func)
1229 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1230 else
1231 BUG_ON(op->status == nfs_ok);
1232
1233 if (!op->status && need_wrongsec_check(rqstp))
1234 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1235
1236 encode_op:
1237 /* Only from SEQUENCE */
1238 if (resp->cstate.status == nfserr_replay_cache) {
1239 dprintk("%s NFS4.1 replay from cache\n", __func__);
1240 status = op->status;
1241 goto out;
1242 }
1243 if (op->status == nfserr_replay_me) {
1244 op->replay = &cstate->replay_owner->so_replay;
1245 nfsd4_encode_replay(resp, op);
1246 status = op->status = op->replay->rp_status;
1247 } else {
1248 nfsd4_encode_operation(resp, op);
1249 status = op->status;
1250 }
1251
1252 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1253 args->ops, args->opcnt, resp->opcnt, op->opnum,
1254 be32_to_cpu(status));
1255
1256 if (cstate->replay_owner) {
1257 nfs4_unlock_state();
1258 cstate->replay_owner = NULL;
1259 }
1260 /* XXX Ugh, we need to get rid of this kind of special case: */
1261 if (op->opnum == OP_READ && op->u.read.rd_filp)
1262 fput(op->u.read.rd_filp);
1263
1264 nfsd4_increment_op_stats(op->opnum);
1265 }
1266
1267 resp->cstate.status = status;
1268 fh_put(&resp->cstate.current_fh);
1269 fh_put(&resp->cstate.save_fh);
1270 BUG_ON(resp->cstate.replay_owner);
1271 out:
1272 /* Reset deferral mechanism for RPC deferrals */
1273 rqstp->rq_usedeferral = 1;
1274 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1275 return status;
1276 }
1277
1278 #define op_encode_hdr_size (2)
1279 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1280 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1281 #define op_encode_change_info_maxsz (5)
1282 #define nfs4_fattr_bitmap_maxsz (4)
1283
1284 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1285 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1286
1287 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1288
1289 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1290 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1291 op_encode_ace_maxsz)
1292
1293 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1294
1295 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1296 {
1297 return (op_encode_hdr_size) * sizeof(__be32);
1298 }
1299
1300 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1301 {
1302 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1303 }
1304
1305 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1306 {
1307 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1308 }
1309
1310 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1311 {
1312 return (op_encode_hdr_size + op_encode_change_info_maxsz
1313 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1314 }
1315
1316 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1317 {
1318 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1319 * sizeof(__be32);
1320 }
1321
1322 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1323 {
1324 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1325 * sizeof(__be32);
1326 }
1327
1328 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1329 {
1330 return (op_encode_hdr_size + op_encode_stateid_maxsz
1331 + op_encode_change_info_maxsz + 1
1332 + nfs4_fattr_bitmap_maxsz
1333 + op_encode_delegation_maxsz) * sizeof(__be32);
1334 }
1335
1336 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1337 {
1338 u32 maxcount = 0, rlen = 0;
1339
1340 maxcount = svc_max_payload(rqstp);
1341 rlen = op->u.read.rd_length;
1342
1343 if (rlen > maxcount)
1344 rlen = maxcount;
1345
1346 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1347 }
1348
1349 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1350 {
1351 u32 rlen = op->u.readdir.rd_maxcount;
1352
1353 if (rlen > PAGE_SIZE)
1354 rlen = PAGE_SIZE;
1355
1356 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1357 * sizeof(__be32) + rlen;
1358 }
1359
1360 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1361 {
1362 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1363 * sizeof(__be32);
1364 }
1365
1366 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1367 {
1368 return (op_encode_hdr_size + op_encode_change_info_maxsz
1369 + op_encode_change_info_maxsz) * sizeof(__be32);
1370 }
1371
1372 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1373 {
1374 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1375 }
1376
1377 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1378 {
1379 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1380 }
1381
1382 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1383 {
1384 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1385 }
1386
1387 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1388 {
1389 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1390 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1391 2 + /*eir_server_owner.so_minor_id */\
1392 /* eir_server_owner.so_major_id<> */\
1393 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1394 /* eir_server_scope<> */\
1395 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1396 1 + /* eir_server_impl_id array length */\
1397 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1398 }
1399
1400 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1401 {
1402 return (op_encode_hdr_size + \
1403 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1404 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1405 }
1406
1407 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1408 {
1409 return (op_encode_hdr_size + \
1410 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1411 2 + /* csr_sequence, csr_flags */\
1412 op_encode_channel_attrs_maxsz + \
1413 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1414 }
1415
1416 static struct nfsd4_operation nfsd4_ops[] = {
1417 [OP_ACCESS] = {
1418 .op_func = (nfsd4op_func)nfsd4_access,
1419 .op_name = "OP_ACCESS",
1420 },
1421 [OP_CLOSE] = {
1422 .op_func = (nfsd4op_func)nfsd4_close,
1423 .op_flags = OP_MODIFIES_SOMETHING,
1424 .op_name = "OP_CLOSE",
1425 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1426 },
1427 [OP_COMMIT] = {
1428 .op_func = (nfsd4op_func)nfsd4_commit,
1429 .op_flags = OP_MODIFIES_SOMETHING,
1430 .op_name = "OP_COMMIT",
1431 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1432 },
1433 [OP_CREATE] = {
1434 .op_func = (nfsd4op_func)nfsd4_create,
1435 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1436 .op_name = "OP_CREATE",
1437 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1438 },
1439 [OP_DELEGRETURN] = {
1440 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1441 .op_flags = OP_MODIFIES_SOMETHING,
1442 .op_name = "OP_DELEGRETURN",
1443 .op_rsize_bop = nfsd4_only_status_rsize,
1444 },
1445 [OP_GETATTR] = {
1446 .op_func = (nfsd4op_func)nfsd4_getattr,
1447 .op_flags = ALLOWED_ON_ABSENT_FS,
1448 .op_name = "OP_GETATTR",
1449 },
1450 [OP_GETFH] = {
1451 .op_func = (nfsd4op_func)nfsd4_getfh,
1452 .op_name = "OP_GETFH",
1453 },
1454 [OP_LINK] = {
1455 .op_func = (nfsd4op_func)nfsd4_link,
1456 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1457 | OP_CACHEME,
1458 .op_name = "OP_LINK",
1459 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1460 },
1461 [OP_LOCK] = {
1462 .op_func = (nfsd4op_func)nfsd4_lock,
1463 .op_flags = OP_MODIFIES_SOMETHING,
1464 .op_name = "OP_LOCK",
1465 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1466 },
1467 [OP_LOCKT] = {
1468 .op_func = (nfsd4op_func)nfsd4_lockt,
1469 .op_name = "OP_LOCKT",
1470 },
1471 [OP_LOCKU] = {
1472 .op_func = (nfsd4op_func)nfsd4_locku,
1473 .op_flags = OP_MODIFIES_SOMETHING,
1474 .op_name = "OP_LOCKU",
1475 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1476 },
1477 [OP_LOOKUP] = {
1478 .op_func = (nfsd4op_func)nfsd4_lookup,
1479 .op_flags = OP_HANDLES_WRONGSEC,
1480 .op_name = "OP_LOOKUP",
1481 },
1482 [OP_LOOKUPP] = {
1483 .op_func = (nfsd4op_func)nfsd4_lookupp,
1484 .op_flags = OP_HANDLES_WRONGSEC,
1485 .op_name = "OP_LOOKUPP",
1486 },
1487 [OP_NVERIFY] = {
1488 .op_func = (nfsd4op_func)nfsd4_nverify,
1489 .op_name = "OP_NVERIFY",
1490 },
1491 [OP_OPEN] = {
1492 .op_func = (nfsd4op_func)nfsd4_open,
1493 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1494 .op_name = "OP_OPEN",
1495 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1496 },
1497 [OP_OPEN_CONFIRM] = {
1498 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1499 .op_flags = OP_MODIFIES_SOMETHING,
1500 .op_name = "OP_OPEN_CONFIRM",
1501 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1502 },
1503 [OP_OPEN_DOWNGRADE] = {
1504 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1505 .op_flags = OP_MODIFIES_SOMETHING,
1506 .op_name = "OP_OPEN_DOWNGRADE",
1507 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1508 },
1509 [OP_PUTFH] = {
1510 .op_func = (nfsd4op_func)nfsd4_putfh,
1511 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1512 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1513 .op_name = "OP_PUTFH",
1514 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1515 },
1516 [OP_PUTPUBFH] = {
1517 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1518 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1519 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1520 .op_name = "OP_PUTPUBFH",
1521 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1522 },
1523 [OP_PUTROOTFH] = {
1524 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1525 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1526 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1527 .op_name = "OP_PUTROOTFH",
1528 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1529 },
1530 [OP_READ] = {
1531 .op_func = (nfsd4op_func)nfsd4_read,
1532 .op_flags = OP_MODIFIES_SOMETHING,
1533 .op_name = "OP_READ",
1534 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1535 },
1536 [OP_READDIR] = {
1537 .op_func = (nfsd4op_func)nfsd4_readdir,
1538 .op_flags = OP_MODIFIES_SOMETHING,
1539 .op_name = "OP_READDIR",
1540 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1541 },
1542 [OP_READLINK] = {
1543 .op_func = (nfsd4op_func)nfsd4_readlink,
1544 .op_name = "OP_READLINK",
1545 },
1546 [OP_REMOVE] = {
1547 .op_func = (nfsd4op_func)nfsd4_remove,
1548 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1549 .op_name = "OP_REMOVE",
1550 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1551 },
1552 [OP_RENAME] = {
1553 .op_func = (nfsd4op_func)nfsd4_rename,
1554 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1555 .op_name = "OP_RENAME",
1556 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1557 },
1558 [OP_RENEW] = {
1559 .op_func = (nfsd4op_func)nfsd4_renew,
1560 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1561 | OP_MODIFIES_SOMETHING,
1562 .op_name = "OP_RENEW",
1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1564
1565 },
1566 [OP_RESTOREFH] = {
1567 .op_func = (nfsd4op_func)nfsd4_restorefh,
1568 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1569 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1570 .op_name = "OP_RESTOREFH",
1571 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1572 },
1573 [OP_SAVEFH] = {
1574 .op_func = (nfsd4op_func)nfsd4_savefh,
1575 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1576 .op_name = "OP_SAVEFH",
1577 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1578 },
1579 [OP_SECINFO] = {
1580 .op_func = (nfsd4op_func)nfsd4_secinfo,
1581 .op_flags = OP_HANDLES_WRONGSEC,
1582 .op_name = "OP_SECINFO",
1583 },
1584 [OP_SETATTR] = {
1585 .op_func = (nfsd4op_func)nfsd4_setattr,
1586 .op_name = "OP_SETATTR",
1587 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1588 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1589 },
1590 [OP_SETCLIENTID] = {
1591 .op_func = (nfsd4op_func)nfsd4_setclientid,
1592 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1593 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1594 .op_name = "OP_SETCLIENTID",
1595 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1596 },
1597 [OP_SETCLIENTID_CONFIRM] = {
1598 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1599 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1600 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1601 .op_name = "OP_SETCLIENTID_CONFIRM",
1602 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1603 },
1604 [OP_VERIFY] = {
1605 .op_func = (nfsd4op_func)nfsd4_verify,
1606 .op_name = "OP_VERIFY",
1607 },
1608 [OP_WRITE] = {
1609 .op_func = (nfsd4op_func)nfsd4_write,
1610 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1611 .op_name = "OP_WRITE",
1612 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1613 },
1614 [OP_RELEASE_LOCKOWNER] = {
1615 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1616 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1617 | OP_MODIFIES_SOMETHING,
1618 .op_name = "OP_RELEASE_LOCKOWNER",
1619 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1620 },
1621
1622 /* NFSv4.1 operations */
1623 [OP_EXCHANGE_ID] = {
1624 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1625 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1626 | OP_MODIFIES_SOMETHING,
1627 .op_name = "OP_EXCHANGE_ID",
1628 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1629 },
1630 [OP_BIND_CONN_TO_SESSION] = {
1631 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1632 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1633 | OP_MODIFIES_SOMETHING,
1634 .op_name = "OP_BIND_CONN_TO_SESSION",
1635 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1636 },
1637 [OP_CREATE_SESSION] = {
1638 .op_func = (nfsd4op_func)nfsd4_create_session,
1639 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1640 | OP_MODIFIES_SOMETHING,
1641 .op_name = "OP_CREATE_SESSION",
1642 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1643 },
1644 [OP_DESTROY_SESSION] = {
1645 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1646 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1647 | OP_MODIFIES_SOMETHING,
1648 .op_name = "OP_DESTROY_SESSION",
1649 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1650 },
1651 [OP_SEQUENCE] = {
1652 .op_func = (nfsd4op_func)nfsd4_sequence,
1653 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1654 .op_name = "OP_SEQUENCE",
1655 },
1656 [OP_DESTROY_CLIENTID] = {
1657 .op_func = NULL,
1658 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1659 | OP_MODIFIES_SOMETHING,
1660 .op_name = "OP_DESTROY_CLIENTID",
1661 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1662 },
1663 [OP_RECLAIM_COMPLETE] = {
1664 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1665 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1666 .op_name = "OP_RECLAIM_COMPLETE",
1667 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1668 },
1669 [OP_SECINFO_NO_NAME] = {
1670 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1671 .op_flags = OP_HANDLES_WRONGSEC,
1672 .op_name = "OP_SECINFO_NO_NAME",
1673 },
1674 [OP_TEST_STATEID] = {
1675 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1676 .op_flags = ALLOWED_WITHOUT_FH,
1677 .op_name = "OP_TEST_STATEID",
1678 },
1679 [OP_FREE_STATEID] = {
1680 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1681 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1682 .op_name = "OP_FREE_STATEID",
1683 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1684 },
1685 };
1686
1687 static const char *nfsd4_op_name(unsigned opnum)
1688 {
1689 if (opnum < ARRAY_SIZE(nfsd4_ops))
1690 return nfsd4_ops[opnum].op_name;
1691 return "unknown_operation";
1692 }
1693
1694 #define nfsd4_voidres nfsd4_voidargs
1695 struct nfsd4_voidargs { int dummy; };
1696
1697 static struct svc_procedure nfsd_procedures4[2] = {
1698 [NFSPROC4_NULL] = {
1699 .pc_func = (svc_procfunc) nfsd4_proc_null,
1700 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1701 .pc_argsize = sizeof(struct nfsd4_voidargs),
1702 .pc_ressize = sizeof(struct nfsd4_voidres),
1703 .pc_cachetype = RC_NOCACHE,
1704 .pc_xdrressize = 1,
1705 },
1706 [NFSPROC4_COMPOUND] = {
1707 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1708 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1709 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1710 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1711 .pc_ressize = sizeof(struct nfsd4_compoundres),
1712 .pc_release = nfsd4_release_compoundargs,
1713 .pc_cachetype = RC_NOCACHE,
1714 .pc_xdrressize = NFSD_BUFSIZE/4,
1715 },
1716 };
1717
1718 struct svc_version nfsd_version4 = {
1719 .vs_vers = 4,
1720 .vs_nproc = 2,
1721 .vs_proc = nfsd_procedures4,
1722 .vs_dispatch = nfsd_dispatch,
1723 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1724 };
1725
1726 /*
1727 * Local variables:
1728 * c-basic-offset: 8
1729 * End:
1730 */
kernel source for telekom puls (alcatel/mediatek)