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8ae5abfe6ba24fd699aed2e156a2b2f815695c04
[deliverable/linux.git] / fs / nfsd / nfs4proc.c
1 /*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42 #include "current_stateid.h"
43 #include "netns.h"
44
45 #define NFSDDBG_FACILITY NFSDDBG_PROC
46
47 static u32 nfsd_attrmask[] = {
48 NFSD_WRITEABLE_ATTRS_WORD0,
49 NFSD_WRITEABLE_ATTRS_WORD1,
50 NFSD_WRITEABLE_ATTRS_WORD2
51 };
52
53 static u32 nfsd41_ex_attrmask[] = {
54 NFSD_SUPPATTR_EXCLCREAT_WORD0,
55 NFSD_SUPPATTR_EXCLCREAT_WORD1,
56 NFSD_SUPPATTR_EXCLCREAT_WORD2
57 };
58
59 static __be32
60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
61 u32 *bmval, u32 *writable)
62 {
63 struct dentry *dentry = cstate->current_fh.fh_dentry;
64
65 /*
66 * Check about attributes are supported by the NFSv4 server or not.
67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
68 */
69 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
70 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
71 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
72 return nfserr_attrnotsupp;
73
74 /*
75 * Check FATTR4_WORD0_ACL can be supported
76 * in current environment or not.
77 */
78 if (bmval[0] & FATTR4_WORD0_ACL) {
79 if (!IS_POSIXACL(dentry->d_inode))
80 return nfserr_attrnotsupp;
81 }
82
83 /*
84 * According to spec, read-only attributes return ERR_INVAL.
85 */
86 if (writable) {
87 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
88 (bmval[2] & ~writable[2]))
89 return nfserr_inval;
90 }
91
92 return nfs_ok;
93 }
94
95 static __be32
96 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
97 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
98 {
99 __be32 status = nfs_ok;
100
101 if (open->op_create == NFS4_OPEN_CREATE) {
102 if (open->op_createmode == NFS4_CREATE_UNCHECKED
103 || open->op_createmode == NFS4_CREATE_GUARDED)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd_attrmask);
106 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
107 status = check_attr_support(rqstp, cstate,
108 open->op_bmval, nfsd41_ex_attrmask);
109 }
110
111 return status;
112 }
113
114 static int
115 is_create_with_attrs(struct nfsd4_open *open)
116 {
117 return open->op_create == NFS4_OPEN_CREATE
118 && (open->op_createmode == NFS4_CREATE_UNCHECKED
119 || open->op_createmode == NFS4_CREATE_GUARDED
120 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
121 }
122
123 /*
124 * if error occurs when setting the acl, just clear the acl bit
125 * in the returned attr bitmap.
126 */
127 static void
128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
129 struct nfs4_acl *acl, u32 *bmval)
130 {
131 __be32 status;
132
133 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
134 if (status)
135 /*
136 * We should probably fail the whole open at this point,
137 * but we've already created the file, so it's too late;
138 * So this seems the least of evils:
139 */
140 bmval[0] &= ~FATTR4_WORD0_ACL;
141 }
142
143 static inline void
144 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
145 {
146 fh_put(dst);
147 dget(src->fh_dentry);
148 if (src->fh_export)
149 cache_get(&src->fh_export->h);
150 *dst = *src;
151 }
152
153 static __be32
154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
155 {
156 __be32 status;
157
158 if (open->op_truncate &&
159 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
160 return nfserr_inval;
161
162 accmode |= NFSD_MAY_READ_IF_EXEC;
163
164 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
165 accmode |= NFSD_MAY_READ;
166 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
167 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
168 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
169 accmode |= NFSD_MAY_WRITE;
170
171 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
172
173 return status;
174 }
175
176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
177 {
178 umode_t mode = fh->fh_dentry->d_inode->i_mode;
179
180 if (S_ISREG(mode))
181 return nfs_ok;
182 if (S_ISDIR(mode))
183 return nfserr_isdir;
184 /*
185 * Using err_symlink as our catch-all case may look odd; but
186 * there's no other obvious error for this case in 4.0, and we
187 * happen to know that it will cause the linux v4 client to do
188 * the right thing on attempts to open something other than a
189 * regular file.
190 */
191 return nfserr_symlink;
192 }
193
194 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
195 {
196 if (nfsd4_has_session(cstate))
197 return;
198 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
199 &resfh->fh_handle);
200 }
201
202 static __be32
203 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
204 {
205 struct svc_fh *current_fh = &cstate->current_fh;
206 struct svc_fh *resfh;
207 int accmode;
208 __be32 status;
209
210 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
211 if (!resfh)
212 return nfserr_jukebox;
213 fh_init(resfh, NFS4_FHSIZE);
214 open->op_truncate = 0;
215
216 if (open->op_create) {
217 /* FIXME: check session persistence and pnfs flags.
218 * The nfsv4.1 spec requires the following semantics:
219 *
220 * Persistent | pNFS | Server REQUIRED | Client Allowed
221 * Reply Cache | server | |
222 * -------------+--------+-----------------+--------------------
223 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
224 * | | | (SHOULD)
225 * | | and EXCLUSIVE4 | or EXCLUSIVE4
226 * | | | (SHOULD NOT)
227 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
228 * yes | no | GUARDED4 | GUARDED4
229 * yes | yes | GUARDED4 | GUARDED4
230 */
231
232 /*
233 * Note: create modes (UNCHECKED,GUARDED...) are the same
234 * in NFSv4 as in v3 except EXCLUSIVE4_1.
235 */
236 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
237 open->op_fname.len, &open->op_iattr,
238 resfh, open->op_createmode,
239 (u32 *)open->op_verf.data,
240 &open->op_truncate, &open->op_created);
241
242 /*
243 * Following rfc 3530 14.2.16, use the returned bitmask
244 * to indicate which attributes we used to store the
245 * verifier:
246 */
247 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
248 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
249 FATTR4_WORD1_TIME_MODIFY);
250 } else {
251 status = nfsd_lookup(rqstp, current_fh,
252 open->op_fname.data, open->op_fname.len, resfh);
253 fh_unlock(current_fh);
254 }
255 if (status)
256 goto out;
257 status = nfsd_check_obj_isreg(resfh);
258 if (status)
259 goto out;
260
261 if (is_create_with_attrs(open) && open->op_acl != NULL)
262 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
263
264 nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
265 accmode = NFSD_MAY_NOP;
266 if (open->op_created)
267 accmode |= NFSD_MAY_OWNER_OVERRIDE;
268 status = do_open_permission(rqstp, resfh, open, accmode);
269 set_change_info(&open->op_cinfo, current_fh);
270 fh_dup2(current_fh, resfh);
271 out:
272 fh_put(resfh);
273 kfree(resfh);
274 return status;
275 }
276
277 static __be32
278 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
279 {
280 struct svc_fh *current_fh = &cstate->current_fh;
281 __be32 status;
282
283 /* We don't know the target directory, and therefore can not
284 * set the change info
285 */
286
287 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
288
289 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
290
291 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
292 (open->op_iattr.ia_size == 0);
293
294 status = do_open_permission(rqstp, current_fh, open,
295 NFSD_MAY_OWNER_OVERRIDE);
296
297 return status;
298 }
299
300 static void
301 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
302 {
303 struct nfsd4_sessionid *sid =
304 (struct nfsd4_sessionid *)session->se_sessionid.data;
305
306 clid->cl_boot = sid->clientid.cl_boot;
307 clid->cl_id = sid->clientid.cl_id;
308 }
309
310 static __be32
311 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
312 struct nfsd4_open *open)
313 {
314 __be32 status;
315 struct nfsd4_compoundres *resp;
316 struct net *net = SVC_NET(rqstp);
317 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
318
319 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
320 (int)open->op_fname.len, open->op_fname.data,
321 open->op_openowner);
322
323 /* This check required by spec. */
324 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
325 return nfserr_inval;
326
327 open->op_created = 0;
328 /*
329 * RFC5661 18.51.3
330 * Before RECLAIM_COMPLETE done, server should deny new lock
331 */
332 if (nfsd4_has_session(cstate) &&
333 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
334 &cstate->session->se_client->cl_flags) &&
335 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
336 return nfserr_grace;
337
338 if (nfsd4_has_session(cstate))
339 copy_clientid(&open->op_clientid, cstate->session);
340
341 nfs4_lock_state();
342
343 /* check seqid for replay. set nfs4_owner */
344 resp = rqstp->rq_resp;
345 status = nfsd4_process_open1(&resp->cstate, open, nn);
346 if (status == nfserr_replay_me) {
347 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
348 fh_put(&cstate->current_fh);
349 fh_copy_shallow(&cstate->current_fh.fh_handle,
350 &rp->rp_openfh);
351 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
352 if (status)
353 dprintk("nfsd4_open: replay failed"
354 " restoring previous filehandle\n");
355 else
356 status = nfserr_replay_me;
357 }
358 if (status)
359 goto out;
360 if (open->op_xdr_error) {
361 status = open->op_xdr_error;
362 goto out;
363 }
364
365 status = nfsd4_check_open_attributes(rqstp, cstate, open);
366 if (status)
367 goto out;
368
369 /* Openowner is now set, so sequence id will get bumped. Now we need
370 * these checks before we do any creates: */
371 status = nfserr_grace;
372 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
373 goto out;
374 status = nfserr_no_grace;
375 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
376 goto out;
377
378 switch (open->op_claim_type) {
379 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
380 case NFS4_OPEN_CLAIM_NULL:
381 status = do_open_lookup(rqstp, cstate, open);
382 if (status)
383 goto out;
384 break;
385 case NFS4_OPEN_CLAIM_PREVIOUS:
386 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
387 status = nfs4_check_open_reclaim(&open->op_clientid,
388 cstate->minorversion,
389 nn);
390 if (status)
391 goto out;
392 case NFS4_OPEN_CLAIM_FH:
393 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
394 status = do_open_fhandle(rqstp, cstate, open);
395 if (status)
396 goto out;
397 break;
398 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
399 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
400 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
401 dprintk("NFSD: unsupported OPEN claim type %d\n",
402 open->op_claim_type);
403 status = nfserr_notsupp;
404 goto out;
405 default:
406 dprintk("NFSD: Invalid OPEN claim type %d\n",
407 open->op_claim_type);
408 status = nfserr_inval;
409 goto out;
410 }
411 /*
412 * nfsd4_process_open2() does the actual opening of the file. If
413 * successful, it (1) truncates the file if open->op_truncate was
414 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
415 */
416 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
417 WARN_ON(status && open->op_created);
418 out:
419 nfsd4_cleanup_open_state(open, status);
420 if (open->op_openowner && !nfsd4_has_session(cstate))
421 cstate->replay_owner = &open->op_openowner->oo_owner;
422 nfsd4_bump_seqid(cstate, status);
423 if (!cstate->replay_owner)
424 nfs4_unlock_state();
425 return status;
426 }
427
428 /*
429 * OPEN is the only seqid-mutating operation whose decoding can fail
430 * with a seqid-mutating error (specifically, decoding of user names in
431 * the attributes). Therefore we have to do some processing to look up
432 * the stateowner so that we can bump the seqid.
433 */
434 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
435 {
436 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
437
438 if (!seqid_mutating_err(ntohl(op->status)))
439 return op->status;
440 if (nfsd4_has_session(cstate))
441 return op->status;
442 open->op_xdr_error = op->status;
443 return nfsd4_open(rqstp, cstate, open);
444 }
445
446 /*
447 * filehandle-manipulating ops.
448 */
449 static __be32
450 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
451 struct svc_fh **getfh)
452 {
453 if (!cstate->current_fh.fh_dentry)
454 return nfserr_nofilehandle;
455
456 *getfh = &cstate->current_fh;
457 return nfs_ok;
458 }
459
460 static __be32
461 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
462 struct nfsd4_putfh *putfh)
463 {
464 fh_put(&cstate->current_fh);
465 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
466 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
467 putfh->pf_fhlen);
468 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
469 }
470
471 static __be32
472 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
473 void *arg)
474 {
475 __be32 status;
476
477 fh_put(&cstate->current_fh);
478 status = exp_pseudoroot(rqstp, &cstate->current_fh);
479 return status;
480 }
481
482 static __be32
483 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
484 void *arg)
485 {
486 if (!cstate->save_fh.fh_dentry)
487 return nfserr_restorefh;
488
489 fh_dup2(&cstate->current_fh, &cstate->save_fh);
490 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
491 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
492 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
493 }
494 return nfs_ok;
495 }
496
497 static __be32
498 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 void *arg)
500 {
501 if (!cstate->current_fh.fh_dentry)
502 return nfserr_nofilehandle;
503
504 fh_dup2(&cstate->save_fh, &cstate->current_fh);
505 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
506 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
507 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
508 }
509 return nfs_ok;
510 }
511
512 /*
513 * misc nfsv4 ops
514 */
515 static __be32
516 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
517 struct nfsd4_access *access)
518 {
519 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
520 return nfserr_inval;
521
522 access->ac_resp_access = access->ac_req_access;
523 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
524 &access->ac_supported);
525 }
526
527 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
528 {
529 __be32 verf[2];
530 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
531
532 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
533 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
534 memcpy(verifier->data, verf, sizeof(verifier->data));
535 }
536
537 static __be32
538 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
539 struct nfsd4_commit *commit)
540 {
541 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
542 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
543 commit->co_count);
544 }
545
546 static __be32
547 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
548 struct nfsd4_create *create)
549 {
550 struct svc_fh resfh;
551 __be32 status;
552 dev_t rdev;
553
554 fh_init(&resfh, NFS4_FHSIZE);
555
556 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
557 NFSD_MAY_CREATE);
558 if (status)
559 return status;
560
561 status = check_attr_support(rqstp, cstate, create->cr_bmval,
562 nfsd_attrmask);
563 if (status)
564 return status;
565
566 switch (create->cr_type) {
567 case NF4LNK:
568 /* ugh! we have to null-terminate the linktext, or
569 * vfs_symlink() will choke. it is always safe to
570 * null-terminate by brute force, since at worst we
571 * will overwrite the first byte of the create namelen
572 * in the XDR buffer, which has already been extracted
573 * during XDR decode.
574 */
575 create->cr_linkname[create->cr_linklen] = 0;
576
577 status = nfsd_symlink(rqstp, &cstate->current_fh,
578 create->cr_name, create->cr_namelen,
579 create->cr_linkname, create->cr_linklen,
580 &resfh, &create->cr_iattr);
581 break;
582
583 case NF4BLK:
584 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
585 if (MAJOR(rdev) != create->cr_specdata1 ||
586 MINOR(rdev) != create->cr_specdata2)
587 return nfserr_inval;
588 status = nfsd_create(rqstp, &cstate->current_fh,
589 create->cr_name, create->cr_namelen,
590 &create->cr_iattr, S_IFBLK, rdev, &resfh);
591 break;
592
593 case NF4CHR:
594 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
595 if (MAJOR(rdev) != create->cr_specdata1 ||
596 MINOR(rdev) != create->cr_specdata2)
597 return nfserr_inval;
598 status = nfsd_create(rqstp, &cstate->current_fh,
599 create->cr_name, create->cr_namelen,
600 &create->cr_iattr,S_IFCHR, rdev, &resfh);
601 break;
602
603 case NF4SOCK:
604 status = nfsd_create(rqstp, &cstate->current_fh,
605 create->cr_name, create->cr_namelen,
606 &create->cr_iattr, S_IFSOCK, 0, &resfh);
607 break;
608
609 case NF4FIFO:
610 status = nfsd_create(rqstp, &cstate->current_fh,
611 create->cr_name, create->cr_namelen,
612 &create->cr_iattr, S_IFIFO, 0, &resfh);
613 break;
614
615 case NF4DIR:
616 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
617 status = nfsd_create(rqstp, &cstate->current_fh,
618 create->cr_name, create->cr_namelen,
619 &create->cr_iattr, S_IFDIR, 0, &resfh);
620 break;
621
622 default:
623 status = nfserr_badtype;
624 }
625
626 if (status)
627 goto out;
628
629 if (create->cr_acl != NULL)
630 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
631 create->cr_bmval);
632
633 fh_unlock(&cstate->current_fh);
634 set_change_info(&create->cr_cinfo, &cstate->current_fh);
635 fh_dup2(&cstate->current_fh, &resfh);
636 out:
637 fh_put(&resfh);
638 return status;
639 }
640
641 static __be32
642 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
643 struct nfsd4_getattr *getattr)
644 {
645 __be32 status;
646
647 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
648 if (status)
649 return status;
650
651 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
652 return nfserr_inval;
653
654 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
655 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
656 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
657
658 getattr->ga_fhp = &cstate->current_fh;
659 return nfs_ok;
660 }
661
662 static __be32
663 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
664 struct nfsd4_link *link)
665 {
666 __be32 status = nfserr_nofilehandle;
667
668 if (!cstate->save_fh.fh_dentry)
669 return status;
670 status = nfsd_link(rqstp, &cstate->current_fh,
671 link->li_name, link->li_namelen, &cstate->save_fh);
672 if (!status)
673 set_change_info(&link->li_cinfo, &cstate->current_fh);
674 return status;
675 }
676
677 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
678 {
679 struct svc_fh tmp_fh;
680 __be32 ret;
681
682 fh_init(&tmp_fh, NFS4_FHSIZE);
683 ret = exp_pseudoroot(rqstp, &tmp_fh);
684 if (ret)
685 return ret;
686 if (tmp_fh.fh_dentry == fh->fh_dentry) {
687 fh_put(&tmp_fh);
688 return nfserr_noent;
689 }
690 fh_put(&tmp_fh);
691 return nfsd_lookup(rqstp, fh, "..", 2, fh);
692 }
693
694 static __be32
695 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
696 void *arg)
697 {
698 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
699 }
700
701 static __be32
702 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
703 struct nfsd4_lookup *lookup)
704 {
705 return nfsd_lookup(rqstp, &cstate->current_fh,
706 lookup->lo_name, lookup->lo_len,
707 &cstate->current_fh);
708 }
709
710 static __be32
711 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
712 struct nfsd4_read *read)
713 {
714 __be32 status;
715
716 /* no need to check permission - this will be done in nfsd_read() */
717
718 read->rd_filp = NULL;
719 if (read->rd_offset >= OFFSET_MAX)
720 return nfserr_inval;
721
722 /*
723 * If we do a zero copy read, then a client will see read data
724 * that reflects the state of the file *after* performing the
725 * following compound.
726 *
727 * To ensure proper ordering, we therefore turn off zero copy if
728 * the client wants us to do more in this compound:
729 */
730 if (!nfsd4_last_compound_op(rqstp))
731 rqstp->rq_splice_ok = false;
732
733 nfs4_lock_state();
734 /* check stateid */
735 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
736 cstate, &read->rd_stateid,
737 RD_STATE, &read->rd_filp))) {
738 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
739 goto out;
740 }
741 if (read->rd_filp)
742 get_file(read->rd_filp);
743 status = nfs_ok;
744 out:
745 nfs4_unlock_state();
746 read->rd_rqstp = rqstp;
747 read->rd_fhp = &cstate->current_fh;
748 return status;
749 }
750
751 static __be32
752 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
753 struct nfsd4_readdir *readdir)
754 {
755 u64 cookie = readdir->rd_cookie;
756 static const nfs4_verifier zeroverf;
757
758 /* no need to check permission - this will be done in nfsd_readdir() */
759
760 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
761 return nfserr_inval;
762
763 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
764 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
765 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
766
767 if ((cookie == 1) || (cookie == 2) ||
768 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
769 return nfserr_bad_cookie;
770
771 readdir->rd_rqstp = rqstp;
772 readdir->rd_fhp = &cstate->current_fh;
773 return nfs_ok;
774 }
775
776 static __be32
777 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
778 struct nfsd4_readlink *readlink)
779 {
780 readlink->rl_rqstp = rqstp;
781 readlink->rl_fhp = &cstate->current_fh;
782 return nfs_ok;
783 }
784
785 static __be32
786 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
787 struct nfsd4_remove *remove)
788 {
789 __be32 status;
790
791 if (locks_in_grace(SVC_NET(rqstp)))
792 return nfserr_grace;
793 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
794 remove->rm_name, remove->rm_namelen);
795 if (!status) {
796 fh_unlock(&cstate->current_fh);
797 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
798 }
799 return status;
800 }
801
802 static __be32
803 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
804 struct nfsd4_rename *rename)
805 {
806 __be32 status = nfserr_nofilehandle;
807
808 if (!cstate->save_fh.fh_dentry)
809 return status;
810 if (locks_in_grace(SVC_NET(rqstp)) &&
811 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
812 return nfserr_grace;
813 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
814 rename->rn_snamelen, &cstate->current_fh,
815 rename->rn_tname, rename->rn_tnamelen);
816 if (status)
817 return status;
818 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
819 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
820 return nfs_ok;
821 }
822
823 static __be32
824 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
825 struct nfsd4_secinfo *secinfo)
826 {
827 struct svc_fh resfh;
828 struct svc_export *exp;
829 struct dentry *dentry;
830 __be32 err;
831
832 fh_init(&resfh, NFS4_FHSIZE);
833 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
834 if (err)
835 return err;
836 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
837 secinfo->si_name, secinfo->si_namelen,
838 &exp, &dentry);
839 if (err)
840 return err;
841 if (dentry->d_inode == NULL) {
842 exp_put(exp);
843 err = nfserr_noent;
844 } else
845 secinfo->si_exp = exp;
846 dput(dentry);
847 if (cstate->minorversion)
848 /* See rfc 5661 section 2.6.3.1.1.8 */
849 fh_put(&cstate->current_fh);
850 return err;
851 }
852
853 static __be32
854 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
855 struct nfsd4_secinfo_no_name *sin)
856 {
857 __be32 err;
858
859 switch (sin->sin_style) {
860 case NFS4_SECINFO_STYLE4_CURRENT_FH:
861 break;
862 case NFS4_SECINFO_STYLE4_PARENT:
863 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
864 if (err)
865 return err;
866 break;
867 default:
868 return nfserr_inval;
869 }
870 exp_get(cstate->current_fh.fh_export);
871 sin->sin_exp = cstate->current_fh.fh_export;
872 fh_put(&cstate->current_fh);
873 return nfs_ok;
874 }
875
876 static __be32
877 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
878 struct nfsd4_setattr *setattr)
879 {
880 __be32 status = nfs_ok;
881 int err;
882
883 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
884 nfs4_lock_state();
885 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
886 &setattr->sa_stateid, WR_STATE, NULL);
887 nfs4_unlock_state();
888 if (status) {
889 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
890 return status;
891 }
892 }
893 err = fh_want_write(&cstate->current_fh);
894 if (err)
895 return nfserrno(err);
896 status = nfs_ok;
897
898 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
899 nfsd_attrmask);
900 if (status)
901 goto out;
902
903 if (setattr->sa_acl != NULL)
904 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
905 setattr->sa_acl);
906 if (status)
907 goto out;
908 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
909 0, (time_t)0);
910 out:
911 fh_drop_write(&cstate->current_fh);
912 return status;
913 }
914
915 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
916 {
917 int i = 1;
918 int buflen = write->wr_buflen;
919
920 vec[0].iov_base = write->wr_head.iov_base;
921 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
922 buflen -= vec[0].iov_len;
923
924 while (buflen) {
925 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
926 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
927 buflen -= vec[i].iov_len;
928 i++;
929 }
930 return i;
931 }
932
933 static __be32
934 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
935 struct nfsd4_write *write)
936 {
937 stateid_t *stateid = &write->wr_stateid;
938 struct file *filp = NULL;
939 __be32 status = nfs_ok;
940 unsigned long cnt;
941 int nvecs;
942
943 /* no need to check permission - this will be done in nfsd_write() */
944
945 if (write->wr_offset >= OFFSET_MAX)
946 return nfserr_inval;
947
948 nfs4_lock_state();
949 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
950 cstate, stateid, WR_STATE, &filp);
951 if (status) {
952 nfs4_unlock_state();
953 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
954 return status;
955 }
956 if (filp)
957 get_file(filp);
958 nfs4_unlock_state();
959
960 cnt = write->wr_buflen;
961 write->wr_how_written = write->wr_stable_how;
962 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
963
964 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
965 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
966
967 status = nfsd_write(rqstp, &cstate->current_fh, filp,
968 write->wr_offset, rqstp->rq_vec, nvecs,
969 &cnt, &write->wr_how_written);
970 if (filp)
971 fput(filp);
972
973 write->wr_bytes_written = cnt;
974
975 return status;
976 }
977
978 /* This routine never returns NFS_OK! If there are no other errors, it
979 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
980 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
981 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
982 */
983 static __be32
984 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
985 struct nfsd4_verify *verify)
986 {
987 __be32 *buf, *p;
988 int count;
989 __be32 status;
990
991 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
992 if (status)
993 return status;
994
995 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
996 if (status)
997 return status;
998
999 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1000 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1001 return nfserr_inval;
1002 if (verify->ve_attrlen & 3)
1003 return nfserr_inval;
1004
1005 /* count in words:
1006 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1007 */
1008 count = 4 + (verify->ve_attrlen >> 2);
1009 buf = kmalloc(count << 2, GFP_KERNEL);
1010 if (!buf)
1011 return nfserr_jukebox;
1012
1013 p = buf;
1014 status = nfsd4_encode_fattr(&cstate->current_fh,
1015 cstate->current_fh.fh_export,
1016 cstate->current_fh.fh_dentry, &p,
1017 count, verify->ve_bmval,
1018 rqstp, 0);
1019
1020 /* this means that nfsd4_encode_fattr() ran out of space */
1021 if (status == nfserr_resource)
1022 status = nfserr_not_same;
1023 if (status)
1024 goto out_kfree;
1025
1026 /* skip bitmap */
1027 p = buf + 1 + ntohl(buf[0]);
1028 status = nfserr_not_same;
1029 if (ntohl(*p++) != verify->ve_attrlen)
1030 goto out_kfree;
1031 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1032 status = nfserr_same;
1033
1034 out_kfree:
1035 kfree(buf);
1036 return status;
1037 }
1038
1039 static __be32
1040 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1041 struct nfsd4_verify *verify)
1042 {
1043 __be32 status;
1044
1045 status = _nfsd4_verify(rqstp, cstate, verify);
1046 return status == nfserr_not_same ? nfs_ok : status;
1047 }
1048
1049 static __be32
1050 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1051 struct nfsd4_verify *verify)
1052 {
1053 __be32 status;
1054
1055 status = _nfsd4_verify(rqstp, cstate, verify);
1056 return status == nfserr_same ? nfs_ok : status;
1057 }
1058
1059 /*
1060 * NULL call.
1061 */
1062 static __be32
1063 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1064 {
1065 return nfs_ok;
1066 }
1067
1068 static inline void nfsd4_increment_op_stats(u32 opnum)
1069 {
1070 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1071 nfsdstats.nfs4_opcount[opnum]++;
1072 }
1073
1074 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1075 void *);
1076 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1077 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1078 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1079
1080 enum nfsd4_op_flags {
1081 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1082 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1083 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1084 /* For rfc 5661 section 2.6.3.1.1: */
1085 OP_HANDLES_WRONGSEC = 1 << 3,
1086 OP_IS_PUTFH_LIKE = 1 << 4,
1087 /*
1088 * These are the ops whose result size we estimate before
1089 * encoding, to avoid performing an op then not being able to
1090 * respond or cache a response. This includes writes and setattrs
1091 * as well as the operations usually called "nonidempotent":
1092 */
1093 OP_MODIFIES_SOMETHING = 1 << 5,
1094 /*
1095 * Cache compounds containing these ops in the xid-based drc:
1096 * We use the DRC for compounds containing non-idempotent
1097 * operations, *except* those that are 4.1-specific (since
1098 * sessions provide their own EOS), and except for stateful
1099 * operations other than setclientid and setclientid_confirm
1100 * (since sequence numbers provide EOS for open, lock, etc in
1101 * the v4.0 case).
1102 */
1103 OP_CACHEME = 1 << 6,
1104 /*
1105 * These are ops which clear current state id.
1106 */
1107 OP_CLEAR_STATEID = 1 << 7,
1108 };
1109
1110 struct nfsd4_operation {
1111 nfsd4op_func op_func;
1112 u32 op_flags;
1113 char *op_name;
1114 /* Try to get response size before operation */
1115 nfsd4op_rsize op_rsize_bop;
1116 stateid_getter op_get_currentstateid;
1117 stateid_setter op_set_currentstateid;
1118 };
1119
1120 static struct nfsd4_operation nfsd4_ops[];
1121
1122 #ifdef NFSD_DEBUG
1123 static const char *nfsd4_op_name(unsigned opnum);
1124 #endif
1125
1126 /*
1127 * Enforce NFSv4.1 COMPOUND ordering rules:
1128 *
1129 * Also note, enforced elsewhere:
1130 * - SEQUENCE other than as first op results in
1131 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1132 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1133 * (Enforced in nfsd4_bind_conn_to_session().)
1134 * - DESTROY_SESSION must be the final operation in a compound, if
1135 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1136 * (Enforced in nfsd4_destroy_session().)
1137 */
1138 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1139 {
1140 struct nfsd4_op *op = &args->ops[0];
1141
1142 /* These ordering requirements don't apply to NFSv4.0: */
1143 if (args->minorversion == 0)
1144 return nfs_ok;
1145 /* This is weird, but OK, not our problem: */
1146 if (args->opcnt == 0)
1147 return nfs_ok;
1148 if (op->status == nfserr_op_illegal)
1149 return nfs_ok;
1150 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1151 return nfserr_op_not_in_session;
1152 if (op->opnum == OP_SEQUENCE)
1153 return nfs_ok;
1154 if (args->opcnt != 1)
1155 return nfserr_not_only_op;
1156 return nfs_ok;
1157 }
1158
1159 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1160 {
1161 return &nfsd4_ops[op->opnum];
1162 }
1163
1164 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1165 {
1166 return OPDESC(op)->op_flags & OP_CACHEME;
1167 }
1168
1169 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1170 {
1171 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1172 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1173 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1174 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1175 struct nfsd4_operation *thisd;
1176 struct nfsd4_operation *nextd;
1177
1178 thisd = OPDESC(this);
1179 /*
1180 * Most ops check wronsec on our own; only the putfh-like ops
1181 * have special rules.
1182 */
1183 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1184 return false;
1185 /*
1186 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1187 * put-filehandle operation if we're not going to use the
1188 * result:
1189 */
1190 if (argp->opcnt == resp->opcnt)
1191 return false;
1192
1193 nextd = OPDESC(next);
1194 /*
1195 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1196 * errors themselves as necessary; others should check for them
1197 * now:
1198 */
1199 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1200 }
1201
1202 /*
1203 * COMPOUND call.
1204 */
1205 static __be32
1206 nfsd4_proc_compound(struct svc_rqst *rqstp,
1207 struct nfsd4_compoundargs *args,
1208 struct nfsd4_compoundres *resp)
1209 {
1210 struct nfsd4_op *op;
1211 struct nfsd4_operation *opdesc;
1212 struct nfsd4_compound_state *cstate = &resp->cstate;
1213 int slack_bytes;
1214 u32 plen = 0;
1215 __be32 status;
1216
1217 resp->xbuf = &rqstp->rq_res;
1218 resp->p = rqstp->rq_res.head[0].iov_base +
1219 rqstp->rq_res.head[0].iov_len;
1220 resp->tagp = resp->p;
1221 /* reserve space for: taglen, tag, and opcnt */
1222 resp->p += 2 + XDR_QUADLEN(args->taglen);
1223 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1224 resp->taglen = args->taglen;
1225 resp->tag = args->tag;
1226 resp->opcnt = 0;
1227 resp->rqstp = rqstp;
1228 resp->cstate.minorversion = args->minorversion;
1229 resp->cstate.replay_owner = NULL;
1230 resp->cstate.session = NULL;
1231 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1232 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1233 /*
1234 * Don't use the deferral mechanism for NFSv4; compounds make it
1235 * too hard to avoid non-idempotency problems.
1236 */
1237 rqstp->rq_usedeferral = 0;
1238
1239 /*
1240 * According to RFC3010, this takes precedence over all other errors.
1241 */
1242 status = nfserr_minor_vers_mismatch;
1243 if (args->minorversion > nfsd_supported_minorversion)
1244 goto out;
1245
1246 status = nfs41_check_op_ordering(args);
1247 if (status) {
1248 op = &args->ops[0];
1249 op->status = status;
1250 goto encode_op;
1251 }
1252
1253 while (!status && resp->opcnt < args->opcnt) {
1254 op = &args->ops[resp->opcnt++];
1255
1256 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1257 resp->opcnt, args->opcnt, op->opnum,
1258 nfsd4_op_name(op->opnum));
1259 /*
1260 * The XDR decode routines may have pre-set op->status;
1261 * for example, if there is a miscellaneous XDR error
1262 * it will be set to nfserr_bad_xdr.
1263 */
1264 if (op->status) {
1265 if (op->opnum == OP_OPEN)
1266 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1267 goto encode_op;
1268 }
1269
1270 /* We must be able to encode a successful response to
1271 * this operation, with enough room left over to encode a
1272 * failed response to the next operation. If we don't
1273 * have enough room, fail with ERR_RESOURCE.
1274 */
1275 slack_bytes = (char *)resp->end - (char *)resp->p;
1276 if (slack_bytes < COMPOUND_SLACK_SPACE
1277 + COMPOUND_ERR_SLACK_SPACE) {
1278 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1279 op->status = nfserr_resource;
1280 goto encode_op;
1281 }
1282
1283 opdesc = OPDESC(op);
1284
1285 if (!cstate->current_fh.fh_dentry) {
1286 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1287 op->status = nfserr_nofilehandle;
1288 goto encode_op;
1289 }
1290 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1291 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1292 op->status = nfserr_moved;
1293 goto encode_op;
1294 }
1295
1296 /* If op is non-idempotent */
1297 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1298 plen = opdesc->op_rsize_bop(rqstp, op);
1299 op->status = nfsd4_check_resp_size(resp, plen);
1300 }
1301
1302 if (op->status)
1303 goto encode_op;
1304
1305 if (opdesc->op_get_currentstateid)
1306 opdesc->op_get_currentstateid(cstate, &op->u);
1307 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1308
1309 if (!op->status) {
1310 if (opdesc->op_set_currentstateid)
1311 opdesc->op_set_currentstateid(cstate, &op->u);
1312
1313 if (opdesc->op_flags & OP_CLEAR_STATEID)
1314 clear_current_stateid(cstate);
1315
1316 if (need_wrongsec_check(rqstp))
1317 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1318 }
1319
1320 encode_op:
1321 /* Only from SEQUENCE */
1322 if (resp->cstate.status == nfserr_replay_cache) {
1323 dprintk("%s NFS4.1 replay from cache\n", __func__);
1324 status = op->status;
1325 goto out;
1326 }
1327 if (op->status == nfserr_replay_me) {
1328 op->replay = &cstate->replay_owner->so_replay;
1329 nfsd4_encode_replay(resp, op);
1330 status = op->status = op->replay->rp_status;
1331 } else {
1332 nfsd4_encode_operation(resp, op);
1333 status = op->status;
1334 }
1335
1336 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1337 args->ops, args->opcnt, resp->opcnt, op->opnum,
1338 be32_to_cpu(status));
1339
1340 if (cstate->replay_owner) {
1341 nfs4_unlock_state();
1342 cstate->replay_owner = NULL;
1343 }
1344 /* XXX Ugh, we need to get rid of this kind of special case: */
1345 if (op->opnum == OP_READ && op->u.read.rd_filp)
1346 fput(op->u.read.rd_filp);
1347
1348 nfsd4_increment_op_stats(op->opnum);
1349 }
1350
1351 resp->cstate.status = status;
1352 fh_put(&resp->cstate.current_fh);
1353 fh_put(&resp->cstate.save_fh);
1354 BUG_ON(resp->cstate.replay_owner);
1355 out:
1356 /* Reset deferral mechanism for RPC deferrals */
1357 rqstp->rq_usedeferral = 1;
1358 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1359 return status;
1360 }
1361
1362 #define op_encode_hdr_size (2)
1363 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1364 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1365 #define op_encode_change_info_maxsz (5)
1366 #define nfs4_fattr_bitmap_maxsz (4)
1367
1368 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1369 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1370
1371 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1372
1373 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1374 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1375 op_encode_ace_maxsz)
1376
1377 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1378
1379 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1380 {
1381 return (op_encode_hdr_size) * sizeof(__be32);
1382 }
1383
1384 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1385 {
1386 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1387 }
1388
1389 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1390 {
1391 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1392 }
1393
1394 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1395 {
1396 return (op_encode_hdr_size + op_encode_change_info_maxsz
1397 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1398 }
1399
1400 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1401 {
1402 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1403 * sizeof(__be32);
1404 }
1405
1406 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1407 {
1408 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1409 * sizeof(__be32);
1410 }
1411
1412 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1413 {
1414 return (op_encode_hdr_size + op_encode_stateid_maxsz
1415 + op_encode_change_info_maxsz + 1
1416 + nfs4_fattr_bitmap_maxsz
1417 + op_encode_delegation_maxsz) * sizeof(__be32);
1418 }
1419
1420 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1421 {
1422 u32 maxcount = 0, rlen = 0;
1423
1424 maxcount = svc_max_payload(rqstp);
1425 rlen = op->u.read.rd_length;
1426
1427 if (rlen > maxcount)
1428 rlen = maxcount;
1429
1430 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1431 }
1432
1433 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1434 {
1435 u32 rlen = op->u.readdir.rd_maxcount;
1436
1437 if (rlen > PAGE_SIZE)
1438 rlen = PAGE_SIZE;
1439
1440 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1441 * sizeof(__be32) + rlen;
1442 }
1443
1444 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1445 {
1446 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1447 * sizeof(__be32);
1448 }
1449
1450 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1451 {
1452 return (op_encode_hdr_size + op_encode_change_info_maxsz
1453 + op_encode_change_info_maxsz) * sizeof(__be32);
1454 }
1455
1456 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1457 {
1458 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1459 }
1460
1461 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1462 {
1463 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1464 }
1465
1466 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1467 {
1468 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1469 }
1470
1471 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1472 {
1473 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1474 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1475 2 + /*eir_server_owner.so_minor_id */\
1476 /* eir_server_owner.so_major_id<> */\
1477 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1478 /* eir_server_scope<> */\
1479 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1480 1 + /* eir_server_impl_id array length */\
1481 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1482 }
1483
1484 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1485 {
1486 return (op_encode_hdr_size + \
1487 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1488 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1489 }
1490
1491 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1492 {
1493 return (op_encode_hdr_size + \
1494 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1495 2 + /* csr_sequence, csr_flags */\
1496 op_encode_channel_attrs_maxsz + \
1497 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1498 }
1499
1500 static struct nfsd4_operation nfsd4_ops[] = {
1501 [OP_ACCESS] = {
1502 .op_func = (nfsd4op_func)nfsd4_access,
1503 .op_name = "OP_ACCESS",
1504 },
1505 [OP_CLOSE] = {
1506 .op_func = (nfsd4op_func)nfsd4_close,
1507 .op_flags = OP_MODIFIES_SOMETHING,
1508 .op_name = "OP_CLOSE",
1509 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1510 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1511 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1512 },
1513 [OP_COMMIT] = {
1514 .op_func = (nfsd4op_func)nfsd4_commit,
1515 .op_flags = OP_MODIFIES_SOMETHING,
1516 .op_name = "OP_COMMIT",
1517 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1518 },
1519 [OP_CREATE] = {
1520 .op_func = (nfsd4op_func)nfsd4_create,
1521 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1522 .op_name = "OP_CREATE",
1523 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1524 },
1525 [OP_DELEGRETURN] = {
1526 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1527 .op_flags = OP_MODIFIES_SOMETHING,
1528 .op_name = "OP_DELEGRETURN",
1529 .op_rsize_bop = nfsd4_only_status_rsize,
1530 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1531 },
1532 [OP_GETATTR] = {
1533 .op_func = (nfsd4op_func)nfsd4_getattr,
1534 .op_flags = ALLOWED_ON_ABSENT_FS,
1535 .op_name = "OP_GETATTR",
1536 },
1537 [OP_GETFH] = {
1538 .op_func = (nfsd4op_func)nfsd4_getfh,
1539 .op_name = "OP_GETFH",
1540 },
1541 [OP_LINK] = {
1542 .op_func = (nfsd4op_func)nfsd4_link,
1543 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1544 | OP_CACHEME,
1545 .op_name = "OP_LINK",
1546 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1547 },
1548 [OP_LOCK] = {
1549 .op_func = (nfsd4op_func)nfsd4_lock,
1550 .op_flags = OP_MODIFIES_SOMETHING,
1551 .op_name = "OP_LOCK",
1552 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1553 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1554 },
1555 [OP_LOCKT] = {
1556 .op_func = (nfsd4op_func)nfsd4_lockt,
1557 .op_name = "OP_LOCKT",
1558 },
1559 [OP_LOCKU] = {
1560 .op_func = (nfsd4op_func)nfsd4_locku,
1561 .op_flags = OP_MODIFIES_SOMETHING,
1562 .op_name = "OP_LOCKU",
1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1564 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1565 },
1566 [OP_LOOKUP] = {
1567 .op_func = (nfsd4op_func)nfsd4_lookup,
1568 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1569 .op_name = "OP_LOOKUP",
1570 },
1571 [OP_LOOKUPP] = {
1572 .op_func = (nfsd4op_func)nfsd4_lookupp,
1573 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1574 .op_name = "OP_LOOKUPP",
1575 },
1576 [OP_NVERIFY] = {
1577 .op_func = (nfsd4op_func)nfsd4_nverify,
1578 .op_name = "OP_NVERIFY",
1579 },
1580 [OP_OPEN] = {
1581 .op_func = (nfsd4op_func)nfsd4_open,
1582 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1583 .op_name = "OP_OPEN",
1584 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1585 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1586 },
1587 [OP_OPEN_CONFIRM] = {
1588 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1589 .op_flags = OP_MODIFIES_SOMETHING,
1590 .op_name = "OP_OPEN_CONFIRM",
1591 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1592 },
1593 [OP_OPEN_DOWNGRADE] = {
1594 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1595 .op_flags = OP_MODIFIES_SOMETHING,
1596 .op_name = "OP_OPEN_DOWNGRADE",
1597 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1598 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1599 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1600 },
1601 [OP_PUTFH] = {
1602 .op_func = (nfsd4op_func)nfsd4_putfh,
1603 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1604 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1605 | OP_CLEAR_STATEID,
1606 .op_name = "OP_PUTFH",
1607 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1608 },
1609 [OP_PUTPUBFH] = {
1610 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1611 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1612 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1613 | OP_CLEAR_STATEID,
1614 .op_name = "OP_PUTPUBFH",
1615 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1616 },
1617 [OP_PUTROOTFH] = {
1618 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1619 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1620 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1621 | OP_CLEAR_STATEID,
1622 .op_name = "OP_PUTROOTFH",
1623 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1624 },
1625 [OP_READ] = {
1626 .op_func = (nfsd4op_func)nfsd4_read,
1627 .op_flags = OP_MODIFIES_SOMETHING,
1628 .op_name = "OP_READ",
1629 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1630 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1631 },
1632 [OP_READDIR] = {
1633 .op_func = (nfsd4op_func)nfsd4_readdir,
1634 .op_flags = OP_MODIFIES_SOMETHING,
1635 .op_name = "OP_READDIR",
1636 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1637 },
1638 [OP_READLINK] = {
1639 .op_func = (nfsd4op_func)nfsd4_readlink,
1640 .op_name = "OP_READLINK",
1641 },
1642 [OP_REMOVE] = {
1643 .op_func = (nfsd4op_func)nfsd4_remove,
1644 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1645 .op_name = "OP_REMOVE",
1646 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1647 },
1648 [OP_RENAME] = {
1649 .op_func = (nfsd4op_func)nfsd4_rename,
1650 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1651 .op_name = "OP_RENAME",
1652 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1653 },
1654 [OP_RENEW] = {
1655 .op_func = (nfsd4op_func)nfsd4_renew,
1656 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1657 | OP_MODIFIES_SOMETHING,
1658 .op_name = "OP_RENEW",
1659 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1660
1661 },
1662 [OP_RESTOREFH] = {
1663 .op_func = (nfsd4op_func)nfsd4_restorefh,
1664 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1665 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1666 .op_name = "OP_RESTOREFH",
1667 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1668 },
1669 [OP_SAVEFH] = {
1670 .op_func = (nfsd4op_func)nfsd4_savefh,
1671 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1672 .op_name = "OP_SAVEFH",
1673 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1674 },
1675 [OP_SECINFO] = {
1676 .op_func = (nfsd4op_func)nfsd4_secinfo,
1677 .op_flags = OP_HANDLES_WRONGSEC,
1678 .op_name = "OP_SECINFO",
1679 },
1680 [OP_SETATTR] = {
1681 .op_func = (nfsd4op_func)nfsd4_setattr,
1682 .op_name = "OP_SETATTR",
1683 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1684 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1685 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1686 },
1687 [OP_SETCLIENTID] = {
1688 .op_func = (nfsd4op_func)nfsd4_setclientid,
1689 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1690 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1691 .op_name = "OP_SETCLIENTID",
1692 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1693 },
1694 [OP_SETCLIENTID_CONFIRM] = {
1695 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1696 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1697 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1698 .op_name = "OP_SETCLIENTID_CONFIRM",
1699 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1700 },
1701 [OP_VERIFY] = {
1702 .op_func = (nfsd4op_func)nfsd4_verify,
1703 .op_name = "OP_VERIFY",
1704 },
1705 [OP_WRITE] = {
1706 .op_func = (nfsd4op_func)nfsd4_write,
1707 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1708 .op_name = "OP_WRITE",
1709 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1710 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1711 },
1712 [OP_RELEASE_LOCKOWNER] = {
1713 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1714 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1715 | OP_MODIFIES_SOMETHING,
1716 .op_name = "OP_RELEASE_LOCKOWNER",
1717 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1718 },
1719
1720 /* NFSv4.1 operations */
1721 [OP_EXCHANGE_ID] = {
1722 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1723 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1724 | OP_MODIFIES_SOMETHING,
1725 .op_name = "OP_EXCHANGE_ID",
1726 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1727 },
1728 [OP_BACKCHANNEL_CTL] = {
1729 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1730 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1731 .op_name = "OP_BACKCHANNEL_CTL",
1732 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1733 },
1734 [OP_BIND_CONN_TO_SESSION] = {
1735 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1736 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1737 | OP_MODIFIES_SOMETHING,
1738 .op_name = "OP_BIND_CONN_TO_SESSION",
1739 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1740 },
1741 [OP_CREATE_SESSION] = {
1742 .op_func = (nfsd4op_func)nfsd4_create_session,
1743 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1744 | OP_MODIFIES_SOMETHING,
1745 .op_name = "OP_CREATE_SESSION",
1746 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1747 },
1748 [OP_DESTROY_SESSION] = {
1749 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1750 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1751 | OP_MODIFIES_SOMETHING,
1752 .op_name = "OP_DESTROY_SESSION",
1753 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1754 },
1755 [OP_SEQUENCE] = {
1756 .op_func = (nfsd4op_func)nfsd4_sequence,
1757 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1758 .op_name = "OP_SEQUENCE",
1759 },
1760 [OP_DESTROY_CLIENTID] = {
1761 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1762 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1763 | OP_MODIFIES_SOMETHING,
1764 .op_name = "OP_DESTROY_CLIENTID",
1765 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1766 },
1767 [OP_RECLAIM_COMPLETE] = {
1768 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1769 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1770 .op_name = "OP_RECLAIM_COMPLETE",
1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1772 },
1773 [OP_SECINFO_NO_NAME] = {
1774 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1775 .op_flags = OP_HANDLES_WRONGSEC,
1776 .op_name = "OP_SECINFO_NO_NAME",
1777 },
1778 [OP_TEST_STATEID] = {
1779 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1780 .op_flags = ALLOWED_WITHOUT_FH,
1781 .op_name = "OP_TEST_STATEID",
1782 },
1783 [OP_FREE_STATEID] = {
1784 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1785 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1786 .op_name = "OP_FREE_STATEID",
1787 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1788 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1789 },
1790 };
1791
1792 #ifdef NFSD_DEBUG
1793 static const char *nfsd4_op_name(unsigned opnum)
1794 {
1795 if (opnum < ARRAY_SIZE(nfsd4_ops))
1796 return nfsd4_ops[opnum].op_name;
1797 return "unknown_operation";
1798 }
1799 #endif
1800
1801 #define nfsd4_voidres nfsd4_voidargs
1802 struct nfsd4_voidargs { int dummy; };
1803
1804 static struct svc_procedure nfsd_procedures4[2] = {
1805 [NFSPROC4_NULL] = {
1806 .pc_func = (svc_procfunc) nfsd4_proc_null,
1807 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1808 .pc_argsize = sizeof(struct nfsd4_voidargs),
1809 .pc_ressize = sizeof(struct nfsd4_voidres),
1810 .pc_cachetype = RC_NOCACHE,
1811 .pc_xdrressize = 1,
1812 },
1813 [NFSPROC4_COMPOUND] = {
1814 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1815 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1816 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1817 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1818 .pc_ressize = sizeof(struct nfsd4_compoundres),
1819 .pc_release = nfsd4_release_compoundargs,
1820 .pc_cachetype = RC_NOCACHE,
1821 .pc_xdrressize = NFSD_BUFSIZE/4,
1822 },
1823 };
1824
1825 struct svc_version nfsd_version4 = {
1826 .vs_vers = 4,
1827 .vs_nproc = 2,
1828 .vs_proc = nfsd_procedures4,
1829 .vs_dispatch = nfsd_dispatch,
1830 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1831 };
1832
1833 /*
1834 * Local variables:
1835 * c-basic-offset: 8
1836 * End:
1837 */
Linux kernel - Deliverables
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