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ehea: fix skb_frag_size typo
[linux-btrfs-devel.git] / fs / nfsd / nfs4proc.c
blobfa383361bc610bdbd3689f16d734f6ea1628d45d
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 status = do_open_lookup(rqstp, &cstate->current_fh,
370 open);
371 if (status)
372 goto out;
373 break;
374 case NFS4_OPEN_CLAIM_PREVIOUS:
375 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
376 case NFS4_OPEN_CLAIM_FH:
377 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
378 status = do_open_fhandle(rqstp, &cstate->current_fh,
379 open);
380 if (status)
381 goto out;
382 break;
383 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
384 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
385 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
386 dprintk("NFSD: unsupported OPEN claim type %d\n",
387 open->op_claim_type);
388 status = nfserr_notsupp;
389 goto out;
390 default:
391 dprintk("NFSD: Invalid OPEN claim type %d\n",
392 open->op_claim_type);
393 status = nfserr_inval;
394 goto out;
395 }
396 /*
397 * nfsd4_process_open2() does the actual opening of the file. If
398 * successful, it (1) truncates the file if open->op_truncate was
399 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
400 */
401 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
402 WARN_ON(status && open->op_created);
403 out:
404 nfsd4_cleanup_open_state(open, status);
405 if (open->op_openowner)
406 cstate->replay_owner = &open->op_openowner->oo_owner;
407 else
408 nfs4_unlock_state();
409 return status;
410 }
411
412 /*
413 * filehandle-manipulating ops.
414 */
415 static __be32
416 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
417 struct svc_fh **getfh)
418 {
419 if (!cstate->current_fh.fh_dentry)
420 return nfserr_nofilehandle;
421
422 *getfh = &cstate->current_fh;
423 return nfs_ok;
424 }
425
426 static __be32
427 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
428 struct nfsd4_putfh *putfh)
429 {
430 fh_put(&cstate->current_fh);
431 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
432 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
433 putfh->pf_fhlen);
434 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
435 }
436
437 static __be32
438 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
439 void *arg)
440 {
441 __be32 status;
442
443 fh_put(&cstate->current_fh);
444 status = exp_pseudoroot(rqstp, &cstate->current_fh);
445 return status;
446 }
447
448 static __be32
449 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
450 void *arg)
451 {
452 if (!cstate->save_fh.fh_dentry)
453 return nfserr_restorefh;
454
455 fh_dup2(&cstate->current_fh, &cstate->save_fh);
456 return nfs_ok;
457 }
458
459 static __be32
460 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
461 void *arg)
462 {
463 if (!cstate->current_fh.fh_dentry)
464 return nfserr_nofilehandle;
465
466 fh_dup2(&cstate->save_fh, &cstate->current_fh);
467 return nfs_ok;
468 }
469
470 /*
471 * misc nfsv4 ops
472 */
473 static __be32
474 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
475 struct nfsd4_access *access)
476 {
477 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
478 return nfserr_inval;
479
480 access->ac_resp_access = access->ac_req_access;
481 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
482 &access->ac_supported);
483 }
484
485 static __be32
486 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
487 struct nfsd4_commit *commit)
488 {
489 u32 *p = (u32 *)commit->co_verf.data;
490 *p++ = nfssvc_boot.tv_sec;
491 *p++ = nfssvc_boot.tv_usec;
492
493 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
494 commit->co_count);
495 }
496
497 static __be32
498 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct nfsd4_create *create)
500 {
501 struct svc_fh resfh;
502 __be32 status;
503 dev_t rdev;
504
505 fh_init(&resfh, NFS4_FHSIZE);
506
507 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
508 NFSD_MAY_CREATE);
509 if (status)
510 return status;
511
512 status = check_attr_support(rqstp, cstate, create->cr_bmval,
513 nfsd_attrmask);
514 if (status)
515 return status;
516
517 switch (create->cr_type) {
518 case NF4LNK:
519 /* ugh! we have to null-terminate the linktext, or
520 * vfs_symlink() will choke. it is always safe to
521 * null-terminate by brute force, since at worst we
522 * will overwrite the first byte of the create namelen
523 * in the XDR buffer, which has already been extracted
524 * during XDR decode.
525 */
526 create->cr_linkname[create->cr_linklen] = 0;
527
528 status = nfsd_symlink(rqstp, &cstate->current_fh,
529 create->cr_name, create->cr_namelen,
530 create->cr_linkname, create->cr_linklen,
531 &resfh, &create->cr_iattr);
532 break;
533
534 case NF4BLK:
535 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
536 if (MAJOR(rdev) != create->cr_specdata1 ||
537 MINOR(rdev) != create->cr_specdata2)
538 return nfserr_inval;
539 status = nfsd_create(rqstp, &cstate->current_fh,
540 create->cr_name, create->cr_namelen,
541 &create->cr_iattr, S_IFBLK, rdev, &resfh);
542 break;
543
544 case NF4CHR:
545 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
546 if (MAJOR(rdev) != create->cr_specdata1 ||
547 MINOR(rdev) != create->cr_specdata2)
548 return nfserr_inval;
549 status = nfsd_create(rqstp, &cstate->current_fh,
550 create->cr_name, create->cr_namelen,
551 &create->cr_iattr,S_IFCHR, rdev, &resfh);
552 break;
553
554 case NF4SOCK:
555 status = nfsd_create(rqstp, &cstate->current_fh,
556 create->cr_name, create->cr_namelen,
557 &create->cr_iattr, S_IFSOCK, 0, &resfh);
558 break;
559
560 case NF4FIFO:
561 status = nfsd_create(rqstp, &cstate->current_fh,
562 create->cr_name, create->cr_namelen,
563 &create->cr_iattr, S_IFIFO, 0, &resfh);
564 break;
565
566 case NF4DIR:
567 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
568 status = nfsd_create(rqstp, &cstate->current_fh,
569 create->cr_name, create->cr_namelen,
570 &create->cr_iattr, S_IFDIR, 0, &resfh);
571 break;
572
573 default:
574 status = nfserr_badtype;
575 }
576
577 if (status)
578 goto out;
579
580 if (create->cr_acl != NULL)
581 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
582 create->cr_bmval);
583
584 fh_unlock(&cstate->current_fh);
585 set_change_info(&create->cr_cinfo, &cstate->current_fh);
586 fh_dup2(&cstate->current_fh, &resfh);
587 out:
588 fh_put(&resfh);
589 return status;
590 }
591
592 static __be32
593 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
594 struct nfsd4_getattr *getattr)
595 {
596 __be32 status;
597
598 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
599 if (status)
600 return status;
601
602 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
603 return nfserr_inval;
604
605 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
606 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
607 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
608
609 getattr->ga_fhp = &cstate->current_fh;
610 return nfs_ok;
611 }
612
613 static __be32
614 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
615 struct nfsd4_link *link)
616 {
617 __be32 status = nfserr_nofilehandle;
618
619 if (!cstate->save_fh.fh_dentry)
620 return status;
621 status = nfsd_link(rqstp, &cstate->current_fh,
622 link->li_name, link->li_namelen, &cstate->save_fh);
623 if (!status)
624 set_change_info(&link->li_cinfo, &cstate->current_fh);
625 return status;
626 }
627
628 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
629 {
630 struct svc_fh tmp_fh;
631 __be32 ret;
632
633 fh_init(&tmp_fh, NFS4_FHSIZE);
634 ret = exp_pseudoroot(rqstp, &tmp_fh);
635 if (ret)
636 return ret;
637 if (tmp_fh.fh_dentry == fh->fh_dentry) {
638 fh_put(&tmp_fh);
639 return nfserr_noent;
640 }
641 fh_put(&tmp_fh);
642 return nfsd_lookup(rqstp, fh, "..", 2, fh);
643 }
644
645 static __be32
646 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
647 void *arg)
648 {
649 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
650 }
651
652 static __be32
653 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
654 struct nfsd4_lookup *lookup)
655 {
656 return nfsd_lookup(rqstp, &cstate->current_fh,
657 lookup->lo_name, lookup->lo_len,
658 &cstate->current_fh);
659 }
660
661 static __be32
662 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
663 struct nfsd4_read *read)
664 {
665 __be32 status;
666
667 /* no need to check permission - this will be done in nfsd_read() */
668
669 read->rd_filp = NULL;
670 if (read->rd_offset >= OFFSET_MAX)
671 return nfserr_inval;
672
673 nfs4_lock_state();
674 /* check stateid */
675 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
676 RD_STATE, &read->rd_filp))) {
677 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
678 goto out;
679 }
680 if (read->rd_filp)
681 get_file(read->rd_filp);
682 status = nfs_ok;
683 out:
684 nfs4_unlock_state();
685 read->rd_rqstp = rqstp;
686 read->rd_fhp = &cstate->current_fh;
687 return status;
688 }
689
690 static __be32
691 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
692 struct nfsd4_readdir *readdir)
693 {
694 u64 cookie = readdir->rd_cookie;
695 static const nfs4_verifier zeroverf;
696
697 /* no need to check permission - this will be done in nfsd_readdir() */
698
699 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
700 return nfserr_inval;
701
702 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
703 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
704 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
705
706 if ((cookie == 1) || (cookie == 2) ||
707 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
708 return nfserr_bad_cookie;
709
710 readdir->rd_rqstp = rqstp;
711 readdir->rd_fhp = &cstate->current_fh;
712 return nfs_ok;
713 }
714
715 static __be32
716 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
717 struct nfsd4_readlink *readlink)
718 {
719 readlink->rl_rqstp = rqstp;
720 readlink->rl_fhp = &cstate->current_fh;
721 return nfs_ok;
722 }
723
724 static __be32
725 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726 struct nfsd4_remove *remove)
727 {
728 __be32 status;
729
730 if (locks_in_grace())
731 return nfserr_grace;
732 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
733 remove->rm_name, remove->rm_namelen);
734 if (!status) {
735 fh_unlock(&cstate->current_fh);
736 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
737 }
738 return status;
739 }
740
741 static __be32
742 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
743 struct nfsd4_rename *rename)
744 {
745 __be32 status = nfserr_nofilehandle;
746
747 if (!cstate->save_fh.fh_dentry)
748 return status;
749 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
750 & NFSEXP_NOSUBTREECHECK))
751 return nfserr_grace;
752 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
753 rename->rn_snamelen, &cstate->current_fh,
754 rename->rn_tname, rename->rn_tnamelen);
755
756 /* the underlying filesystem returns different error's than required
757 * by NFSv4. both save_fh and current_fh have been verified.. */
758 if (status == nfserr_isdir)
759 status = nfserr_exist;
760 else if ((status == nfserr_notdir) &&
761 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
762 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
763 status = nfserr_exist;
764
765 if (!status) {
766 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
767 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
768 }
769 return status;
770 }
771
772 static __be32
773 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
774 struct nfsd4_secinfo *secinfo)
775 {
776 struct svc_fh resfh;
777 struct svc_export *exp;
778 struct dentry *dentry;
779 __be32 err;
780
781 fh_init(&resfh, NFS4_FHSIZE);
782 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
783 if (err)
784 return err;
785 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
786 secinfo->si_name, secinfo->si_namelen,
787 &exp, &dentry);
788 if (err)
789 return err;
790 if (dentry->d_inode == NULL) {
791 exp_put(exp);
792 err = nfserr_noent;
793 } else
794 secinfo->si_exp = exp;
795 dput(dentry);
796 if (cstate->minorversion)
797 /* See rfc 5661 section 2.6.3.1.1.8 */
798 fh_put(&cstate->current_fh);
799 return err;
800 }
801
802 static __be32
803 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
804 struct nfsd4_secinfo_no_name *sin)
805 {
806 __be32 err;
807
808 switch (sin->sin_style) {
809 case NFS4_SECINFO_STYLE4_CURRENT_FH:
810 break;
811 case NFS4_SECINFO_STYLE4_PARENT:
812 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
813 if (err)
814 return err;
815 break;
816 default:
817 return nfserr_inval;
818 }
819 exp_get(cstate->current_fh.fh_export);
820 sin->sin_exp = cstate->current_fh.fh_export;
821 fh_put(&cstate->current_fh);
822 return nfs_ok;
823 }
824
825 static __be32
826 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
827 struct nfsd4_setattr *setattr)
828 {
829 __be32 status = nfs_ok;
830
831 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
832 nfs4_lock_state();
833 status = nfs4_preprocess_stateid_op(cstate,
834 &setattr->sa_stateid, WR_STATE, NULL);
835 nfs4_unlock_state();
836 if (status) {
837 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
838 return status;
839 }
840 }
841 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
842 if (status)
843 return status;
844 status = nfs_ok;
845
846 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
847 nfsd_attrmask);
848 if (status)
849 goto out;
850
851 if (setattr->sa_acl != NULL)
852 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
853 setattr->sa_acl);
854 if (status)
855 goto out;
856 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
857 0, (time_t)0);
858 out:
859 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
860 return status;
861 }
862
863 static __be32
864 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
865 struct nfsd4_write *write)
866 {
867 stateid_t *stateid = &write->wr_stateid;
868 struct file *filp = NULL;
869 u32 *p;
870 __be32 status = nfs_ok;
871 unsigned long cnt;
872
873 /* no need to check permission - this will be done in nfsd_write() */
874
875 if (write->wr_offset >= OFFSET_MAX)
876 return nfserr_inval;
877
878 nfs4_lock_state();
879 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
880 if (filp)
881 get_file(filp);
882 nfs4_unlock_state();
883
884 if (status) {
885 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
886 return status;
887 }
888
889 cnt = write->wr_buflen;
890 write->wr_how_written = write->wr_stable_how;
891 p = (u32 *)write->wr_verifier.data;
892 *p++ = nfssvc_boot.tv_sec;
893 *p++ = nfssvc_boot.tv_usec;
894
895 status = nfsd_write(rqstp, &cstate->current_fh, filp,
896 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
897 &cnt, &write->wr_how_written);
898 if (filp)
899 fput(filp);
900
901 write->wr_bytes_written = cnt;
902
903 return status;
904 }
905
906 /* This routine never returns NFS_OK! If there are no other errors, it
907 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
908 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
909 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
910 */
911 static __be32
912 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
913 struct nfsd4_verify *verify)
914 {
915 __be32 *buf, *p;
916 int count;
917 __be32 status;
918
919 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
920 if (status)
921 return status;
922
923 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
924 if (status)
925 return status;
926
927 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
928 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
929 return nfserr_inval;
930 if (verify->ve_attrlen & 3)
931 return nfserr_inval;
932
933 /* count in words:
934 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
935 */
936 count = 4 + (verify->ve_attrlen >> 2);
937 buf = kmalloc(count << 2, GFP_KERNEL);
938 if (!buf)
939 return nfserr_jukebox;
940
941 status = nfsd4_encode_fattr(&cstate->current_fh,
942 cstate->current_fh.fh_export,
943 cstate->current_fh.fh_dentry, buf,
944 &count, verify->ve_bmval,
945 rqstp, 0);
946
947 /* this means that nfsd4_encode_fattr() ran out of space */
948 if (status == nfserr_resource && count == 0)
949 status = nfserr_not_same;
950 if (status)
951 goto out_kfree;
952
953 /* skip bitmap */
954 p = buf + 1 + ntohl(buf[0]);
955 status = nfserr_not_same;
956 if (ntohl(*p++) != verify->ve_attrlen)
957 goto out_kfree;
958 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
959 status = nfserr_same;
960
961 out_kfree:
962 kfree(buf);
963 return status;
964 }
965
966 static __be32
967 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
968 struct nfsd4_verify *verify)
969 {
970 __be32 status;
971
972 status = _nfsd4_verify(rqstp, cstate, verify);
973 return status == nfserr_not_same ? nfs_ok : status;
974 }
975
976 static __be32
977 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
978 struct nfsd4_verify *verify)
979 {
980 __be32 status;
981
982 status = _nfsd4_verify(rqstp, cstate, verify);
983 return status == nfserr_same ? nfs_ok : status;
984 }
985
986 /*
987 * NULL call.
988 */
989 static __be32
990 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
991 {
992 return nfs_ok;
993 }
994
995 static inline void nfsd4_increment_op_stats(u32 opnum)
996 {
997 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
998 nfsdstats.nfs4_opcount[opnum]++;
999 }
1000
1001 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1002 void *);
1003 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1004
1005 enum nfsd4_op_flags {
1006 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1007 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1008 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1009 /* For rfc 5661 section 2.6.3.1.1: */
1010 OP_HANDLES_WRONGSEC = 1 << 3,
1011 OP_IS_PUTFH_LIKE = 1 << 4,
1012 /*
1013 * These are the ops whose result size we estimate before
1014 * encoding, to avoid performing an op then not being able to
1015 * respond or cache a response. This includes writes and setattrs
1016 * as well as the operations usually called "nonidempotent":
1017 */
1018 OP_MODIFIES_SOMETHING = 1 << 5,
1019 /*
1020 * Cache compounds containing these ops in the xid-based drc:
1021 * We use the DRC for compounds containing non-idempotent
1022 * operations, *except* those that are 4.1-specific (since
1023 * sessions provide their own EOS), and except for stateful
1024 * operations other than setclientid and setclientid_confirm
1025 * (since sequence numbers provide EOS for open, lock, etc in
1026 * the v4.0 case).
1027 */
1028 OP_CACHEME = 1 << 6,
1029 };
1030
1031 struct nfsd4_operation {
1032 nfsd4op_func op_func;
1033 u32 op_flags;
1034 char *op_name;
1035 /* Try to get response size before operation */
1036 nfsd4op_rsize op_rsize_bop;
1037 };
1038
1039 static struct nfsd4_operation nfsd4_ops[];
1040
1041 static const char *nfsd4_op_name(unsigned opnum);
1042
1043 /*
1044 * Enforce NFSv4.1 COMPOUND ordering rules:
1045 *
1046 * Also note, enforced elsewhere:
1047 * - SEQUENCE other than as first op results in
1048 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1049 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1050 * (Enforced in nfsd4_bind_conn_to_session().)
1051 * - DESTROY_SESSION must be the final operation in a compound, if
1052 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1053 * (Enforced in nfsd4_destroy_session().)
1054 */
1055 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1056 {
1057 struct nfsd4_op *op = &args->ops[0];
1058
1059 /* These ordering requirements don't apply to NFSv4.0: */
1060 if (args->minorversion == 0)
1061 return nfs_ok;
1062 /* This is weird, but OK, not our problem: */
1063 if (args->opcnt == 0)
1064 return nfs_ok;
1065 if (op->status == nfserr_op_illegal)
1066 return nfs_ok;
1067 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1068 return nfserr_op_not_in_session;
1069 if (op->opnum == OP_SEQUENCE)
1070 return nfs_ok;
1071 if (args->opcnt != 1)
1072 return nfserr_not_only_op;
1073 return nfs_ok;
1074 }
1075
1076 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1077 {
1078 return &nfsd4_ops[op->opnum];
1079 }
1080
1081 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1082 {
1083 return OPDESC(op)->op_flags & OP_CACHEME;
1084 }
1085
1086 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1087 {
1088 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1089 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1090 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1091 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1092 struct nfsd4_operation *thisd;
1093 struct nfsd4_operation *nextd;
1094
1095 thisd = OPDESC(this);
1096 /*
1097 * Most ops check wronsec on our own; only the putfh-like ops
1098 * have special rules.
1099 */
1100 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1101 return false;
1102 /*
1103 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1104 * put-filehandle operation if we're not going to use the
1105 * result:
1106 */
1107 if (argp->opcnt == resp->opcnt)
1108 return false;
1109
1110 nextd = OPDESC(next);
1111 /*
1112 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1113 * errors themselves as necessary; others should check for them
1114 * now:
1115 */
1116 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1117 }
1118
1119 /*
1120 * COMPOUND call.
1121 */
1122 static __be32
1123 nfsd4_proc_compound(struct svc_rqst *rqstp,
1124 struct nfsd4_compoundargs *args,
1125 struct nfsd4_compoundres *resp)
1126 {
1127 struct nfsd4_op *op;
1128 struct nfsd4_operation *opdesc;
1129 struct nfsd4_compound_state *cstate = &resp->cstate;
1130 int slack_bytes;
1131 u32 plen = 0;
1132 __be32 status;
1133
1134 resp->xbuf = &rqstp->rq_res;
1135 resp->p = rqstp->rq_res.head[0].iov_base +
1136 rqstp->rq_res.head[0].iov_len;
1137 resp->tagp = resp->p;
1138 /* reserve space for: taglen, tag, and opcnt */
1139 resp->p += 2 + XDR_QUADLEN(args->taglen);
1140 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1141 resp->taglen = args->taglen;
1142 resp->tag = args->tag;
1143 resp->opcnt = 0;
1144 resp->rqstp = rqstp;
1145 resp->cstate.minorversion = args->minorversion;
1146 resp->cstate.replay_owner = NULL;
1147 resp->cstate.session = NULL;
1148 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1149 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1150 /*
1151 * Don't use the deferral mechanism for NFSv4; compounds make it
1152 * too hard to avoid non-idempotency problems.
1153 */
1154 rqstp->rq_usedeferral = 0;
1155
1156 /*
1157 * According to RFC3010, this takes precedence over all other errors.
1158 */
1159 status = nfserr_minor_vers_mismatch;
1160 if (args->minorversion > nfsd_supported_minorversion)
1161 goto out;
1162
1163 status = nfs41_check_op_ordering(args);
1164 if (status) {
1165 op = &args->ops[0];
1166 op->status = status;
1167 goto encode_op;
1168 }
1169
1170 while (!status && resp->opcnt < args->opcnt) {
1171 op = &args->ops[resp->opcnt++];
1172
1173 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1174 resp->opcnt, args->opcnt, op->opnum,
1175 nfsd4_op_name(op->opnum));
1176 /*
1177 * The XDR decode routines may have pre-set op->status;
1178 * for example, if there is a miscellaneous XDR error
1179 * it will be set to nfserr_bad_xdr.
1180 */
1181 if (op->status)
1182 goto encode_op;
1183
1184 /* We must be able to encode a successful response to
1185 * this operation, with enough room left over to encode a
1186 * failed response to the next operation. If we don't
1187 * have enough room, fail with ERR_RESOURCE.
1188 */
1189 slack_bytes = (char *)resp->end - (char *)resp->p;
1190 if (slack_bytes < COMPOUND_SLACK_SPACE
1191 + COMPOUND_ERR_SLACK_SPACE) {
1192 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1193 op->status = nfserr_resource;
1194 goto encode_op;
1195 }
1196
1197 opdesc = OPDESC(op);
1198
1199 if (!cstate->current_fh.fh_dentry) {
1200 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1201 op->status = nfserr_nofilehandle;
1202 goto encode_op;
1203 }
1204 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1205 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1206 op->status = nfserr_moved;
1207 goto encode_op;
1208 }
1209
1210 /* If op is non-idempotent */
1211 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1212 plen = opdesc->op_rsize_bop(rqstp, op);
1213 op->status = nfsd4_check_resp_size(resp, plen);
1214 }
1215
1216 if (op->status)
1217 goto encode_op;
1218
1219 if (opdesc->op_func)
1220 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1221 else
1222 BUG_ON(op->status == nfs_ok);
1223
1224 if (!op->status && need_wrongsec_check(rqstp))
1225 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1226
1227 encode_op:
1228 /* Only from SEQUENCE */
1229 if (resp->cstate.status == nfserr_replay_cache) {
1230 dprintk("%s NFS4.1 replay from cache\n", __func__);
1231 status = op->status;
1232 goto out;
1233 }
1234 if (op->status == nfserr_replay_me) {
1235 op->replay = &cstate->replay_owner->so_replay;
1236 nfsd4_encode_replay(resp, op);
1237 status = op->status = op->replay->rp_status;
1238 } else {
1239 nfsd4_encode_operation(resp, op);
1240 status = op->status;
1241 }
1242
1243 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1244 args->ops, args->opcnt, resp->opcnt, op->opnum,
1245 be32_to_cpu(status));
1246
1247 if (cstate->replay_owner) {
1248 nfs4_unlock_state();
1249 cstate->replay_owner = NULL;
1250 }
1251 /* XXX Ugh, we need to get rid of this kind of special case: */
1252 if (op->opnum == OP_READ && op->u.read.rd_filp)
1253 fput(op->u.read.rd_filp);
1254
1255 nfsd4_increment_op_stats(op->opnum);
1256 }
1257
1258 resp->cstate.status = status;
1259 fh_put(&resp->cstate.current_fh);
1260 fh_put(&resp->cstate.save_fh);
1261 BUG_ON(resp->cstate.replay_owner);
1262 out:
1263 /* Reset deferral mechanism for RPC deferrals */
1264 rqstp->rq_usedeferral = 1;
1265 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1266 return status;
1267 }
1268
1269 #define op_encode_hdr_size (2)
1270 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1271 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1272 #define op_encode_change_info_maxsz (5)
1273 #define nfs4_fattr_bitmap_maxsz (4)
1274
1275 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1276 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1277
1278 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1279
1280 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1281 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1282 op_encode_ace_maxsz)
1283
1284 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1285
1286 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1287 {
1288 return (op_encode_hdr_size) * sizeof(__be32);
1289 }
1290
1291 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1292 {
1293 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1294 }
1295
1296 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1297 {
1298 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1299 }
1300
1301 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1302 {
1303 return (op_encode_hdr_size + op_encode_change_info_maxsz
1304 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1305 }
1306
1307 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1308 {
1309 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1310 * sizeof(__be32);
1311 }
1312
1313 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1314 {
1315 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1316 * sizeof(__be32);
1317 }
1318
1319 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1320 {
1321 return (op_encode_hdr_size + op_encode_stateid_maxsz
1322 + op_encode_change_info_maxsz + 1
1323 + nfs4_fattr_bitmap_maxsz
1324 + op_encode_delegation_maxsz) * sizeof(__be32);
1325 }
1326
1327 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1328 {
1329 u32 maxcount = 0, rlen = 0;
1330
1331 maxcount = svc_max_payload(rqstp);
1332 rlen = op->u.read.rd_length;
1333
1334 if (rlen > maxcount)
1335 rlen = maxcount;
1336
1337 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1338 }
1339
1340 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1341 {
1342 u32 rlen = op->u.readdir.rd_maxcount;
1343
1344 if (rlen > PAGE_SIZE)
1345 rlen = PAGE_SIZE;
1346
1347 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1348 * sizeof(__be32) + rlen;
1349 }
1350
1351 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1352 {
1353 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1354 * sizeof(__be32);
1355 }
1356
1357 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1358 {
1359 return (op_encode_hdr_size + op_encode_change_info_maxsz
1360 + op_encode_change_info_maxsz) * sizeof(__be32);
1361 }
1362
1363 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1364 {
1365 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1366 }
1367
1368 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1369 {
1370 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1371 }
1372
1373 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1374 {
1375 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1376 }
1377
1378 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1379 {
1380 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1381 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1382 2 + /*eir_server_owner.so_minor_id */\
1383 /* eir_server_owner.so_major_id<> */\
1384 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1385 /* eir_server_scope<> */\
1386 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1387 1 + /* eir_server_impl_id array length */\
1388 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1389 }
1390
1391 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1392 {
1393 return (op_encode_hdr_size + \
1394 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1395 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1396 }
1397
1398 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1399 {
1400 return (op_encode_hdr_size + \
1401 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1402 2 + /* csr_sequence, csr_flags */\
1403 op_encode_channel_attrs_maxsz + \
1404 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1405 }
1406
1407 static struct nfsd4_operation nfsd4_ops[] = {
1408 [OP_ACCESS] = {
1409 .op_func = (nfsd4op_func)nfsd4_access,
1410 .op_name = "OP_ACCESS",
1411 },
1412 [OP_CLOSE] = {
1413 .op_func = (nfsd4op_func)nfsd4_close,
1414 .op_flags = OP_MODIFIES_SOMETHING,
1415 .op_name = "OP_CLOSE",
1416 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1417 },
1418 [OP_COMMIT] = {
1419 .op_func = (nfsd4op_func)nfsd4_commit,
1420 .op_flags = OP_MODIFIES_SOMETHING,
1421 .op_name = "OP_COMMIT",
1422 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1423 },
1424 [OP_CREATE] = {
1425 .op_func = (nfsd4op_func)nfsd4_create,
1426 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1427 .op_name = "OP_CREATE",
1428 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1429 },
1430 [OP_DELEGRETURN] = {
1431 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1432 .op_flags = OP_MODIFIES_SOMETHING,
1433 .op_name = "OP_DELEGRETURN",
1434 .op_rsize_bop = nfsd4_only_status_rsize,
1435 },
1436 [OP_GETATTR] = {
1437 .op_func = (nfsd4op_func)nfsd4_getattr,
1438 .op_flags = ALLOWED_ON_ABSENT_FS,
1439 .op_name = "OP_GETATTR",
1440 },
1441 [OP_GETFH] = {
1442 .op_func = (nfsd4op_func)nfsd4_getfh,
1443 .op_name = "OP_GETFH",
1444 },
1445 [OP_LINK] = {
1446 .op_func = (nfsd4op_func)nfsd4_link,
1447 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1448 | OP_CACHEME,
1449 .op_name = "OP_LINK",
1450 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1451 },
1452 [OP_LOCK] = {
1453 .op_func = (nfsd4op_func)nfsd4_lock,
1454 .op_flags = OP_MODIFIES_SOMETHING,
1455 .op_name = "OP_LOCK",
1456 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1457 },
1458 [OP_LOCKT] = {
1459 .op_func = (nfsd4op_func)nfsd4_lockt,
1460 .op_name = "OP_LOCKT",
1461 },
1462 [OP_LOCKU] = {
1463 .op_func = (nfsd4op_func)nfsd4_locku,
1464 .op_flags = OP_MODIFIES_SOMETHING,
1465 .op_name = "OP_LOCKU",
1466 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1467 },
1468 [OP_LOOKUP] = {
1469 .op_func = (nfsd4op_func)nfsd4_lookup,
1470 .op_flags = OP_HANDLES_WRONGSEC,
1471 .op_name = "OP_LOOKUP",
1472 },
1473 [OP_LOOKUPP] = {
1474 .op_func = (nfsd4op_func)nfsd4_lookupp,
1475 .op_flags = OP_HANDLES_WRONGSEC,
1476 .op_name = "OP_LOOKUPP",
1477 },
1478 [OP_NVERIFY] = {
1479 .op_func = (nfsd4op_func)nfsd4_nverify,
1480 .op_name = "OP_NVERIFY",
1481 },
1482 [OP_OPEN] = {
1483 .op_func = (nfsd4op_func)nfsd4_open,
1484 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1485 .op_name = "OP_OPEN",
1486 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1487 },
1488 [OP_OPEN_CONFIRM] = {
1489 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1490 .op_flags = OP_MODIFIES_SOMETHING,
1491 .op_name = "OP_OPEN_CONFIRM",
1492 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1493 },
1494 [OP_OPEN_DOWNGRADE] = {
1495 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1496 .op_flags = OP_MODIFIES_SOMETHING,
1497 .op_name = "OP_OPEN_DOWNGRADE",
1498 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1499 },
1500 [OP_PUTFH] = {
1501 .op_func = (nfsd4op_func)nfsd4_putfh,
1502 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1503 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1504 .op_name = "OP_PUTFH",
1505 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1506 },
1507 [OP_PUTPUBFH] = {
1508 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1509 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1510 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1511 .op_name = "OP_PUTPUBFH",
1512 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1513 },
1514 [OP_PUTROOTFH] = {
1515 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1516 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1517 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1518 .op_name = "OP_PUTROOTFH",
1519 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1520 },
1521 [OP_READ] = {
1522 .op_func = (nfsd4op_func)nfsd4_read,
1523 .op_flags = OP_MODIFIES_SOMETHING,
1524 .op_name = "OP_READ",
1525 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1526 },
1527 [OP_READDIR] = {
1528 .op_func = (nfsd4op_func)nfsd4_readdir,
1529 .op_flags = OP_MODIFIES_SOMETHING,
1530 .op_name = "OP_READDIR",
1531 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1532 },
1533 [OP_READLINK] = {
1534 .op_func = (nfsd4op_func)nfsd4_readlink,
1535 .op_name = "OP_READLINK",
1536 },
1537 [OP_REMOVE] = {
1538 .op_func = (nfsd4op_func)nfsd4_remove,
1539 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1540 .op_name = "OP_REMOVE",
1541 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1542 },
1543 [OP_RENAME] = {
1544 .op_func = (nfsd4op_func)nfsd4_rename,
1545 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1546 .op_name = "OP_RENAME",
1547 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1548 },
1549 [OP_RENEW] = {
1550 .op_func = (nfsd4op_func)nfsd4_renew,
1551 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1552 | OP_MODIFIES_SOMETHING,
1553 .op_name = "OP_RENEW",
1554 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1555
1556 },
1557 [OP_RESTOREFH] = {
1558 .op_func = (nfsd4op_func)nfsd4_restorefh,
1559 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1560 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1561 .op_name = "OP_RESTOREFH",
1562 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1563 },
1564 [OP_SAVEFH] = {
1565 .op_func = (nfsd4op_func)nfsd4_savefh,
1566 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1567 .op_name = "OP_SAVEFH",
1568 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1569 },
1570 [OP_SECINFO] = {
1571 .op_func = (nfsd4op_func)nfsd4_secinfo,
1572 .op_flags = OP_HANDLES_WRONGSEC,
1573 .op_name = "OP_SECINFO",
1574 },
1575 [OP_SETATTR] = {
1576 .op_func = (nfsd4op_func)nfsd4_setattr,
1577 .op_name = "OP_SETATTR",
1578 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1579 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1580 },
1581 [OP_SETCLIENTID] = {
1582 .op_func = (nfsd4op_func)nfsd4_setclientid,
1583 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1584 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1585 .op_name = "OP_SETCLIENTID",
1586 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1587 },
1588 [OP_SETCLIENTID_CONFIRM] = {
1589 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1590 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1591 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1592 .op_name = "OP_SETCLIENTID_CONFIRM",
1593 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1594 },
1595 [OP_VERIFY] = {
1596 .op_func = (nfsd4op_func)nfsd4_verify,
1597 .op_name = "OP_VERIFY",
1598 },
1599 [OP_WRITE] = {
1600 .op_func = (nfsd4op_func)nfsd4_write,
1601 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1602 .op_name = "OP_WRITE",
1603 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1604 },
1605 [OP_RELEASE_LOCKOWNER] = {
1606 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1607 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1608 | OP_MODIFIES_SOMETHING,
1609 .op_name = "OP_RELEASE_LOCKOWNER",
1610 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1611 },
1612
1613 /* NFSv4.1 operations */
1614 [OP_EXCHANGE_ID] = {
1615 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1616 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1617 | OP_MODIFIES_SOMETHING,
1618 .op_name = "OP_EXCHANGE_ID",
1619 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1620 },
1621 [OP_BIND_CONN_TO_SESSION] = {
1622 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1623 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1624 | OP_MODIFIES_SOMETHING,
1625 .op_name = "OP_BIND_CONN_TO_SESSION",
1626 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1627 },
1628 [OP_CREATE_SESSION] = {
1629 .op_func = (nfsd4op_func)nfsd4_create_session,
1630 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1631 | OP_MODIFIES_SOMETHING,
1632 .op_name = "OP_CREATE_SESSION",
1633 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1634 },
1635 [OP_DESTROY_SESSION] = {
1636 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1637 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1638 | OP_MODIFIES_SOMETHING,
1639 .op_name = "OP_DESTROY_SESSION",
1640 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1641 },
1642 [OP_SEQUENCE] = {
1643 .op_func = (nfsd4op_func)nfsd4_sequence,
1644 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1645 .op_name = "OP_SEQUENCE",
1646 },
1647 [OP_DESTROY_CLIENTID] = {
1648 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1649 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1650 | OP_MODIFIES_SOMETHING,
1651 .op_name = "OP_DESTROY_CLIENTID",
1652 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1653 },
1654 [OP_RECLAIM_COMPLETE] = {
1655 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1656 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1657 .op_name = "OP_RECLAIM_COMPLETE",
1658 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1659 },
1660 [OP_SECINFO_NO_NAME] = {
1661 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1662 .op_flags = OP_HANDLES_WRONGSEC,
1663 .op_name = "OP_SECINFO_NO_NAME",
1664 },
1665 [OP_TEST_STATEID] = {
1666 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1667 .op_flags = ALLOWED_WITHOUT_FH,
1668 .op_name = "OP_TEST_STATEID",
1669 },
1670 [OP_FREE_STATEID] = {
1671 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1672 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1673 .op_name = "OP_FREE_STATEID",
1674 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1675 },
1676 };
1677
1678 static const char *nfsd4_op_name(unsigned opnum)
1679 {
1680 if (opnum < ARRAY_SIZE(nfsd4_ops))
1681 return nfsd4_ops[opnum].op_name;
1682 return "unknown_operation";
1683 }
1684
1685 #define nfsd4_voidres nfsd4_voidargs
1686 struct nfsd4_voidargs { int dummy; };
1687
1688 static struct svc_procedure nfsd_procedures4[2] = {
1689 [NFSPROC4_NULL] = {
1690 .pc_func = (svc_procfunc) nfsd4_proc_null,
1691 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1692 .pc_argsize = sizeof(struct nfsd4_voidargs),
1693 .pc_ressize = sizeof(struct nfsd4_voidres),
1694 .pc_cachetype = RC_NOCACHE,
1695 .pc_xdrressize = 1,
1696 },
1697 [NFSPROC4_COMPOUND] = {
1698 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1699 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1700 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1701 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1702 .pc_ressize = sizeof(struct nfsd4_compoundres),
1703 .pc_release = nfsd4_release_compoundargs,
1704 .pc_cachetype = RC_NOCACHE,
1705 .pc_xdrressize = NFSD_BUFSIZE/4,
1706 },
1707 };
1708
1709 struct svc_version nfsd_version4 = {
1710 .vs_vers = 4,
1711 .vs_nproc = 2,
1712 .vs_proc = nfsd_procedures4,
1713 .vs_dispatch = nfsd_dispatch,
1714 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1715 };
1716
1717 /*
1718 * Local variables:
1719 * c-basic-offset: 8
1720 * End:
1721 */
Linux Btrfs Development