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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 "cache.h"
39#include "xdr4.h"
40#include "vfs.h"
41
42#define NFSDDBG_FACILITY NFSDDBG_PROC
43
44static u32 nfsd_attrmask[] = {
45 NFSD_WRITEABLE_ATTRS_WORD0,
46 NFSD_WRITEABLE_ATTRS_WORD1,
47 NFSD_WRITEABLE_ATTRS_WORD2
48};
49
50static u32 nfsd41_ex_attrmask[] = {
51 NFSD_SUPPATTR_EXCLCREAT_WORD0,
52 NFSD_SUPPATTR_EXCLCREAT_WORD1,
53 NFSD_SUPPATTR_EXCLCREAT_WORD2
54};
55
56static __be32
57check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
58 u32 *bmval, u32 *writable)
59{
60 struct dentry *dentry = cstate->current_fh.fh_dentry;
61
62 /*
63 * Check about attributes are supported by the NFSv4 server or not.
64 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
65 */
66 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
67 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
68 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
69 return nfserr_attrnotsupp;
70
71 /*
72 * Check FATTR4_WORD0_ACL can be supported
73 * in current environment or not.
74 */
75 if (bmval[0] & FATTR4_WORD0_ACL) {
76 if (!IS_POSIXACL(dentry->d_inode))
77 return nfserr_attrnotsupp;
78 }
79
80 /*
81 * According to spec, read-only attributes return ERR_INVAL.
82 */
83 if (writable) {
84 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
85 (bmval[2] & ~writable[2]))
86 return nfserr_inval;
87 }
88
89 return nfs_ok;
90}
91
92static __be32
93nfsd4_check_open_attributes(struct svc_rqst *rqstp,
94 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
95{
96 __be32 status = nfs_ok;
97
98 if (open->op_create == NFS4_OPEN_CREATE) {
99 if (open->op_createmode == NFS4_CREATE_UNCHECKED
100 || open->op_createmode == NFS4_CREATE_GUARDED)
101 status = check_attr_support(rqstp, cstate,
102 open->op_bmval, nfsd_attrmask);
103 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd41_ex_attrmask);
106 }
107
108 return status;
109}
110
111static int
112is_create_with_attrs(struct nfsd4_open *open)
113{
114 return open->op_create == NFS4_OPEN_CREATE
115 && (open->op_createmode == NFS4_CREATE_UNCHECKED
116 || open->op_createmode == NFS4_CREATE_GUARDED
117 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
118}
119
120/*
121 * if error occurs when setting the acl, just clear the acl bit
122 * in the returned attr bitmap.
123 */
124static void
125do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
126 struct nfs4_acl *acl, u32 *bmval)
127{
128 __be32 status;
129
130 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
131 if (status)
132 /*
133 * We should probably fail the whole open at this point,
134 * but we've already created the file, so it's too late;
135 * So this seems the least of evils:
136 */
137 bmval[0] &= ~FATTR4_WORD0_ACL;
138}
139
140static inline void
141fh_dup2(struct svc_fh *dst, struct svc_fh *src)
142{
143 fh_put(dst);
144 dget(src->fh_dentry);
145 if (src->fh_export)
146 cache_get(&src->fh_export->h);
147 *dst = *src;
148}
149
150static __be32
151do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
152{
153 __be32 status;
154
155 if (open->op_truncate &&
156 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
157 return nfserr_inval;
158
159 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
160 accmode |= NFSD_MAY_READ;
161 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
162 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
163 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
164 accmode |= NFSD_MAY_WRITE;
165
166 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
167
168 return status;
169}
170
171static __be32
172do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
173{
174 struct svc_fh resfh;
175 __be32 status;
176 int created = 0;
177
178 fh_init(&resfh, NFS4_FHSIZE);
179 open->op_truncate = 0;
180
181 if (open->op_create) {
182 /* FIXME: check session persistence and pnfs flags.
183 * The nfsv4.1 spec requires the following semantics:
184 *
185 * Persistent | pNFS | Server REQUIRED | Client Allowed
186 * Reply Cache | server | |
187 * -------------+--------+-----------------+--------------------
188 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
189 * | | | (SHOULD)
190 * | | and EXCLUSIVE4 | or EXCLUSIVE4
191 * | | | (SHOULD NOT)
192 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
193 * yes | no | GUARDED4 | GUARDED4
194 * yes | yes | GUARDED4 | GUARDED4
195 */
196
197 /*
198 * Note: create modes (UNCHECKED,GUARDED...) are the same
199 * in NFSv4 as in v3 except EXCLUSIVE4_1.
200 */
201 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
202 open->op_fname.len, &open->op_iattr,
203 &resfh, open->op_createmode,
204 (u32 *)open->op_verf.data,
205 &open->op_truncate, &created);
206
207 /*
208 * Following rfc 3530 14.2.16, use the returned bitmask
209 * to indicate which attributes we used to store the
210 * verifier:
211 */
212 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
213 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
214 FATTR4_WORD1_TIME_MODIFY);
215 } else {
216 status = nfsd_lookup(rqstp, current_fh,
217 open->op_fname.data, open->op_fname.len, &resfh);
218 fh_unlock(current_fh);
219 }
220 if (status)
221 goto out;
222
223 if (is_create_with_attrs(open) && open->op_acl != NULL)
224 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
225
226 set_change_info(&open->op_cinfo, current_fh);
227 fh_dup2(current_fh, &resfh);
228
229 /* set reply cache */
230 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
231 &resfh.fh_handle);
232 if (!created)
233 status = do_open_permission(rqstp, current_fh, open,
234 NFSD_MAY_NOP);
235
236out:
237 fh_put(&resfh);
238 return status;
239}
240
241static __be32
242do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
243{
244 __be32 status;
245
246 /* Only reclaims from previously confirmed clients are valid */
247 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
248 return status;
249
250 /* We don't know the target directory, and therefore can not
251 * set the change info
252 */
253
254 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
255
256 /* set replay cache */
257 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
258 ¤t_fh->fh_handle);
259
260 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
261 (open->op_iattr.ia_size == 0);
262
263 status = do_open_permission(rqstp, current_fh, open,
264 NFSD_MAY_OWNER_OVERRIDE);
265
266 return status;
267}
268
269static void
270copy_clientid(clientid_t *clid, struct nfsd4_session *session)
271{
272 struct nfsd4_sessionid *sid =
273 (struct nfsd4_sessionid *)session->se_sessionid.data;
274
275 clid->cl_boot = sid->clientid.cl_boot;
276 clid->cl_id = sid->clientid.cl_id;
277}
278
279static __be32
280nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
281 struct nfsd4_open *open)
282{
283 __be32 status;
284 struct nfsd4_compoundres *resp;
285
286 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
287 (int)open->op_fname.len, open->op_fname.data,
288 open->op_stateowner);
289
290 /* This check required by spec. */
291 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
292 return nfserr_inval;
293
294 /*
295 * RFC5661 18.51.3
296 * Before RECLAIM_COMPLETE done, server should deny new lock
297 */
298 if (nfsd4_has_session(cstate) &&
299 !cstate->session->se_client->cl_firststate &&
300 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
301 return nfserr_grace;
302
303 if (nfsd4_has_session(cstate))
304 copy_clientid(&open->op_clientid, cstate->session);
305
306 nfs4_lock_state();
307
308 /* check seqid for replay. set nfs4_owner */
309 resp = rqstp->rq_resp;
310 status = nfsd4_process_open1(&resp->cstate, open);
311 if (status == nfserr_replay_me) {
312 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
313 fh_put(&cstate->current_fh);
314 fh_copy_shallow(&cstate->current_fh.fh_handle,
315 &rp->rp_openfh);
316 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
317 if (status)
318 dprintk("nfsd4_open: replay failed"
319 " restoring previous filehandle\n");
320 else
321 status = nfserr_replay_me;
322 }
323 if (status)
324 goto out;
325
326 status = nfsd4_check_open_attributes(rqstp, cstate, open);
327 if (status)
328 goto out;
329
330 /* Openowner is now set, so sequence id will get bumped. Now we need
331 * these checks before we do any creates: */
332 status = nfserr_grace;
333 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
334 goto out;
335 status = nfserr_no_grace;
336 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
337 goto out;
338
339 switch (open->op_claim_type) {
340 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
341 case NFS4_OPEN_CLAIM_NULL:
342 /*
343 * (1) set CURRENT_FH to the file being opened,
344 * creating it if necessary, (2) set open->op_cinfo,
345 * (3) set open->op_truncate if the file is to be
346 * truncated after opening, (4) do permission checking.
347 */
348 status = do_open_lookup(rqstp, &cstate->current_fh,
349 open);
350 if (status)
351 goto out;
352 break;
353 case NFS4_OPEN_CLAIM_PREVIOUS:
354 open->op_stateowner->so_confirmed = 1;
355 /*
356 * The CURRENT_FH is already set to the file being
357 * opened. (1) set open->op_cinfo, (2) set
358 * open->op_truncate if the file is to be truncated
359 * after opening, (3) do permission checking.
360 */
361 status = do_open_fhandle(rqstp, &cstate->current_fh,
362 open);
363 if (status)
364 goto out;
365 break;
366 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
367 open->op_stateowner->so_confirmed = 1;
368 dprintk("NFSD: unsupported OPEN claim type %d\n",
369 open->op_claim_type);
370 status = nfserr_notsupp;
371 goto out;
372 default:
373 dprintk("NFSD: Invalid OPEN claim type %d\n",
374 open->op_claim_type);
375 status = nfserr_inval;
376 goto out;
377 }
378 /*
379 * nfsd4_process_open2() does the actual opening of the file. If
380 * successful, it (1) truncates the file if open->op_truncate was
381 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
382 */
383 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
384out:
385 if (open->op_stateowner) {
386 nfs4_get_stateowner(open->op_stateowner);
387 cstate->replay_owner = open->op_stateowner;
388 }
389 nfs4_unlock_state();
390 return status;
391}
392
393/*
394 * filehandle-manipulating ops.
395 */
396static __be32
397nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
398 struct svc_fh **getfh)
399{
400 if (!cstate->current_fh.fh_dentry)
401 return nfserr_nofilehandle;
402
403 *getfh = &cstate->current_fh;
404 return nfs_ok;
405}
406
407static __be32
408nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
409 struct nfsd4_putfh *putfh)
410{
411 fh_put(&cstate->current_fh);
412 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
413 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
414 putfh->pf_fhlen);
415 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
416}
417
418static __be32
419nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
420 void *arg)
421{
422 __be32 status;
423
424 fh_put(&cstate->current_fh);
425 status = exp_pseudoroot(rqstp, &cstate->current_fh);
426 return status;
427}
428
429static __be32
430nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
431 void *arg)
432{
433 if (!cstate->save_fh.fh_dentry)
434 return nfserr_restorefh;
435
436 fh_dup2(&cstate->current_fh, &cstate->save_fh);
437 return nfs_ok;
438}
439
440static __be32
441nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
442 void *arg)
443{
444 if (!cstate->current_fh.fh_dentry)
445 return nfserr_nofilehandle;
446
447 fh_dup2(&cstate->save_fh, &cstate->current_fh);
448 return nfs_ok;
449}
450
451/*
452 * misc nfsv4 ops
453 */
454static __be32
455nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
456 struct nfsd4_access *access)
457{
458 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
459 return nfserr_inval;
460
461 access->ac_resp_access = access->ac_req_access;
462 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
463 &access->ac_supported);
464}
465
466static __be32
467nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
468 struct nfsd4_commit *commit)
469{
470 __be32 status;
471
472 u32 *p = (u32 *)commit->co_verf.data;
473 *p++ = nfssvc_boot.tv_sec;
474 *p++ = nfssvc_boot.tv_usec;
475
476 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
477 commit->co_count);
478 if (status == nfserr_symlink)
479 status = nfserr_inval;
480 return status;
481}
482
483static __be32
484nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
485 struct nfsd4_create *create)
486{
487 struct svc_fh resfh;
488 __be32 status;
489 dev_t rdev;
490
491 fh_init(&resfh, NFS4_FHSIZE);
492
493 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
494 NFSD_MAY_CREATE);
495 if (status == nfserr_symlink)
496 status = nfserr_notdir;
497 if (status)
498 return status;
499
500 status = check_attr_support(rqstp, cstate, create->cr_bmval,
501 nfsd_attrmask);
502 if (status)
503 return status;
504
505 switch (create->cr_type) {
506 case NF4LNK:
507 /* ugh! we have to null-terminate the linktext, or
508 * vfs_symlink() will choke. it is always safe to
509 * null-terminate by brute force, since at worst we
510 * will overwrite the first byte of the create namelen
511 * in the XDR buffer, which has already been extracted
512 * during XDR decode.
513 */
514 create->cr_linkname[create->cr_linklen] = 0;
515
516 status = nfsd_symlink(rqstp, &cstate->current_fh,
517 create->cr_name, create->cr_namelen,
518 create->cr_linkname, create->cr_linklen,
519 &resfh, &create->cr_iattr);
520 break;
521
522 case NF4BLK:
523 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
524 if (MAJOR(rdev) != create->cr_specdata1 ||
525 MINOR(rdev) != create->cr_specdata2)
526 return nfserr_inval;
527 status = nfsd_create(rqstp, &cstate->current_fh,
528 create->cr_name, create->cr_namelen,
529 &create->cr_iattr, S_IFBLK, rdev, &resfh);
530 break;
531
532 case NF4CHR:
533 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
534 if (MAJOR(rdev) != create->cr_specdata1 ||
535 MINOR(rdev) != create->cr_specdata2)
536 return nfserr_inval;
537 status = nfsd_create(rqstp, &cstate->current_fh,
538 create->cr_name, create->cr_namelen,
539 &create->cr_iattr,S_IFCHR, rdev, &resfh);
540 break;
541
542 case NF4SOCK:
543 status = nfsd_create(rqstp, &cstate->current_fh,
544 create->cr_name, create->cr_namelen,
545 &create->cr_iattr, S_IFSOCK, 0, &resfh);
546 break;
547
548 case NF4FIFO:
549 status = nfsd_create(rqstp, &cstate->current_fh,
550 create->cr_name, create->cr_namelen,
551 &create->cr_iattr, S_IFIFO, 0, &resfh);
552 break;
553
554 case NF4DIR:
555 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
556 status = nfsd_create(rqstp, &cstate->current_fh,
557 create->cr_name, create->cr_namelen,
558 &create->cr_iattr, S_IFDIR, 0, &resfh);
559 break;
560
561 default:
562 status = nfserr_badtype;
563 }
564
565 if (status)
566 goto out;
567
568 if (create->cr_acl != NULL)
569 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
570 create->cr_bmval);
571
572 fh_unlock(&cstate->current_fh);
573 set_change_info(&create->cr_cinfo, &cstate->current_fh);
574 fh_dup2(&cstate->current_fh, &resfh);
575out:
576 fh_put(&resfh);
577 return status;
578}
579
580static __be32
581nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 struct nfsd4_getattr *getattr)
583{
584 __be32 status;
585
586 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
587 if (status)
588 return status;
589
590 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
591 return nfserr_inval;
592
593 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
594 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
595 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
596
597 getattr->ga_fhp = &cstate->current_fh;
598 return nfs_ok;
599}
600
601static __be32
602nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
603 struct nfsd4_link *link)
604{
605 __be32 status = nfserr_nofilehandle;
606
607 if (!cstate->save_fh.fh_dentry)
608 return status;
609 status = nfsd_link(rqstp, &cstate->current_fh,
610 link->li_name, link->li_namelen, &cstate->save_fh);
611 if (!status)
612 set_change_info(&link->li_cinfo, &cstate->current_fh);
613 return status;
614}
615
616static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
617{
618 struct svc_fh tmp_fh;
619 __be32 ret;
620
621 fh_init(&tmp_fh, NFS4_FHSIZE);
622 ret = exp_pseudoroot(rqstp, &tmp_fh);
623 if (ret)
624 return ret;
625 if (tmp_fh.fh_dentry == fh->fh_dentry) {
626 fh_put(&tmp_fh);
627 return nfserr_noent;
628 }
629 fh_put(&tmp_fh);
630 return nfsd_lookup(rqstp, fh, "..", 2, fh);
631}
632
633static __be32
634nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
635 void *arg)
636{
637 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
638}
639
640static __be32
641nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
642 struct nfsd4_lookup *lookup)
643{
644 return nfsd_lookup(rqstp, &cstate->current_fh,
645 lookup->lo_name, lookup->lo_len,
646 &cstate->current_fh);
647}
648
649static __be32
650nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
651 struct nfsd4_read *read)
652{
653 __be32 status;
654
655 /* no need to check permission - this will be done in nfsd_read() */
656
657 read->rd_filp = NULL;
658 if (read->rd_offset >= OFFSET_MAX)
659 return nfserr_inval;
660
661 nfs4_lock_state();
662 /* check stateid */
663 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
664 RD_STATE, &read->rd_filp))) {
665 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
666 goto out;
667 }
668 if (read->rd_filp)
669 get_file(read->rd_filp);
670 status = nfs_ok;
671out:
672 nfs4_unlock_state();
673 read->rd_rqstp = rqstp;
674 read->rd_fhp = &cstate->current_fh;
675 return status;
676}
677
678static __be32
679nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
680 struct nfsd4_readdir *readdir)
681{
682 u64 cookie = readdir->rd_cookie;
683 static const nfs4_verifier zeroverf;
684
685 /* no need to check permission - this will be done in nfsd_readdir() */
686
687 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
688 return nfserr_inval;
689
690 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
691 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
692 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
693
694 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
695 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
696 return nfserr_bad_cookie;
697
698 readdir->rd_rqstp = rqstp;
699 readdir->rd_fhp = &cstate->current_fh;
700 return nfs_ok;
701}
702
703static __be32
704nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
705 struct nfsd4_readlink *readlink)
706{
707 readlink->rl_rqstp = rqstp;
708 readlink->rl_fhp = &cstate->current_fh;
709 return nfs_ok;
710}
711
712static __be32
713nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
714 struct nfsd4_remove *remove)
715{
716 __be32 status;
717
718 if (locks_in_grace())
719 return nfserr_grace;
720 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
721 remove->rm_name, remove->rm_namelen);
722 if (status == nfserr_symlink)
723 return nfserr_notdir;
724 if (!status) {
725 fh_unlock(&cstate->current_fh);
726 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
727 }
728 return status;
729}
730
731static __be32
732nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
733 struct nfsd4_rename *rename)
734{
735 __be32 status = nfserr_nofilehandle;
736
737 if (!cstate->save_fh.fh_dentry)
738 return status;
739 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
740 & NFSEXP_NOSUBTREECHECK))
741 return nfserr_grace;
742 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
743 rename->rn_snamelen, &cstate->current_fh,
744 rename->rn_tname, rename->rn_tnamelen);
745
746 /* the underlying filesystem returns different error's than required
747 * by NFSv4. both save_fh and current_fh have been verified.. */
748 if (status == nfserr_isdir)
749 status = nfserr_exist;
750 else if ((status == nfserr_notdir) &&
751 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
752 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
753 status = nfserr_exist;
754 else if (status == nfserr_symlink)
755 status = nfserr_notdir;
756
757 if (!status) {
758 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
759 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
760 }
761 return status;
762}
763
764static __be32
765nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
766 struct nfsd4_secinfo *secinfo)
767{
768 struct svc_fh resfh;
769 struct svc_export *exp;
770 struct dentry *dentry;
771 __be32 err;
772
773 fh_init(&resfh, NFS4_FHSIZE);
774 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
775 if (err)
776 return err;
777 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
778 secinfo->si_name, secinfo->si_namelen,
779 &exp, &dentry);
780 if (err)
781 return err;
782 if (dentry->d_inode == NULL) {
783 exp_put(exp);
784 err = nfserr_noent;
785 } else
786 secinfo->si_exp = exp;
787 dput(dentry);
788 if (cstate->minorversion)
789 /* See rfc 5661 section 2.6.3.1.1.8 */
790 fh_put(&cstate->current_fh);
791 return err;
792}
793
794static __be32
795nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
796 struct nfsd4_secinfo_no_name *sin)
797{
798 __be32 err;
799
800 switch (sin->sin_style) {
801 case NFS4_SECINFO_STYLE4_CURRENT_FH:
802 break;
803 case NFS4_SECINFO_STYLE4_PARENT:
804 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
805 if (err)
806 return err;
807 break;
808 default:
809 return nfserr_inval;
810 }
811 exp_get(cstate->current_fh.fh_export);
812 sin->sin_exp = cstate->current_fh.fh_export;
813 fh_put(&cstate->current_fh);
814 return nfs_ok;
815}
816
817static __be32
818nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
819 struct nfsd4_setattr *setattr)
820{
821 __be32 status = nfs_ok;
822
823 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
824 nfs4_lock_state();
825 status = nfs4_preprocess_stateid_op(cstate,
826 &setattr->sa_stateid, WR_STATE, NULL);
827 nfs4_unlock_state();
828 if (status) {
829 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
830 return status;
831 }
832 }
833 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
834 if (status)
835 return status;
836 status = nfs_ok;
837
838 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
839 nfsd_attrmask);
840 if (status)
841 goto out;
842
843 if (setattr->sa_acl != NULL)
844 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
845 setattr->sa_acl);
846 if (status)
847 goto out;
848 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
849 0, (time_t)0);
850out:
851 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
852 return status;
853}
854
855static __be32
856nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
857 struct nfsd4_write *write)
858{
859 stateid_t *stateid = &write->wr_stateid;
860 struct file *filp = NULL;
861 u32 *p;
862 __be32 status = nfs_ok;
863 unsigned long cnt;
864
865 /* no need to check permission - this will be done in nfsd_write() */
866
867 if (write->wr_offset >= OFFSET_MAX)
868 return nfserr_inval;
869
870 nfs4_lock_state();
871 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
872 if (filp)
873 get_file(filp);
874 nfs4_unlock_state();
875
876 if (status) {
877 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
878 return status;
879 }
880
881 cnt = write->wr_buflen;
882 write->wr_how_written = write->wr_stable_how;
883 p = (u32 *)write->wr_verifier.data;
884 *p++ = nfssvc_boot.tv_sec;
885 *p++ = nfssvc_boot.tv_usec;
886
887 status = nfsd_write(rqstp, &cstate->current_fh, filp,
888 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
889 &cnt, &write->wr_how_written);
890 if (filp)
891 fput(filp);
892
893 write->wr_bytes_written = cnt;
894
895 if (status == nfserr_symlink)
896 status = nfserr_inval;
897 return status;
898}
899
900/* This routine never returns NFS_OK! If there are no other errors, it
901 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
902 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
903 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
904 */
905static __be32
906_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
907 struct nfsd4_verify *verify)
908{
909 __be32 *buf, *p;
910 int count;
911 __be32 status;
912
913 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
914 if (status)
915 return status;
916
917 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
918 if (status)
919 return status;
920
921 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
922 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
923 return nfserr_inval;
924 if (verify->ve_attrlen & 3)
925 return nfserr_inval;
926
927 /* count in words:
928 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
929 */
930 count = 4 + (verify->ve_attrlen >> 2);
931 buf = kmalloc(count << 2, GFP_KERNEL);
932 if (!buf)
933 return nfserr_resource;
934
935 status = nfsd4_encode_fattr(&cstate->current_fh,
936 cstate->current_fh.fh_export,
937 cstate->current_fh.fh_dentry, buf,
938 &count, verify->ve_bmval,
939 rqstp, 0);
940
941 /* this means that nfsd4_encode_fattr() ran out of space */
942 if (status == nfserr_resource && count == 0)
943 status = nfserr_not_same;
944 if (status)
945 goto out_kfree;
946
947 /* skip bitmap */
948 p = buf + 1 + ntohl(buf[0]);
949 status = nfserr_not_same;
950 if (ntohl(*p++) != verify->ve_attrlen)
951 goto out_kfree;
952 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
953 status = nfserr_same;
954
955out_kfree:
956 kfree(buf);
957 return status;
958}
959
960static __be32
961nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
962 struct nfsd4_verify *verify)
963{
964 __be32 status;
965
966 status = _nfsd4_verify(rqstp, cstate, verify);
967 return status == nfserr_not_same ? nfs_ok : status;
968}
969
970static __be32
971nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
972 struct nfsd4_verify *verify)
973{
974 __be32 status;
975
976 status = _nfsd4_verify(rqstp, cstate, verify);
977 return status == nfserr_same ? nfs_ok : status;
978}
979
980/*
981 * NULL call.
982 */
983static __be32
984nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
985{
986 return nfs_ok;
987}
988
989static inline void nfsd4_increment_op_stats(u32 opnum)
990{
991 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
992 nfsdstats.nfs4_opcount[opnum]++;
993}
994
995typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
996 void *);
997enum nfsd4_op_flags {
998 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
999 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1000 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1001 /* For rfc 5661 section 2.6.3.1.1: */
1002 OP_HANDLES_WRONGSEC = 1 << 3,
1003 OP_IS_PUTFH_LIKE = 1 << 4,
1004};
1005
1006struct nfsd4_operation {
1007 nfsd4op_func op_func;
1008 u32 op_flags;
1009 char *op_name;
1010 /*
1011 * We use the DRC for compounds containing non-idempotent
1012 * operations, *except* those that are 4.1-specific (since
1013 * sessions provide their own EOS), and except for stateful
1014 * operations other than setclientid and setclientid_confirm
1015 * (since sequence numbers provide EOS for open, lock, etc in
1016 * the v4.0 case).
1017 */
1018 bool op_cacheresult;
1019};
1020
1021static struct nfsd4_operation nfsd4_ops[];
1022
1023static const char *nfsd4_op_name(unsigned opnum);
1024
1025/*
1026 * Enforce NFSv4.1 COMPOUND ordering rules:
1027 *
1028 * Also note, enforced elsewhere:
1029 * - SEQUENCE other than as first op results in
1030 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1031 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1032 * (Enforced in nfsd4_bind_conn_to_session().)
1033 * - DESTROY_SESSION must be the final operation in a compound, if
1034 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1035 * (Enforced in nfsd4_destroy_session().)
1036 */
1037static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1038{
1039 struct nfsd4_op *op = &args->ops[0];
1040
1041 /* These ordering requirements don't apply to NFSv4.0: */
1042 if (args->minorversion == 0)
1043 return nfs_ok;
1044 /* This is weird, but OK, not our problem: */
1045 if (args->opcnt == 0)
1046 return nfs_ok;
1047 if (op->status == nfserr_op_illegal)
1048 return nfs_ok;
1049 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1050 return nfserr_op_not_in_session;
1051 if (op->opnum == OP_SEQUENCE)
1052 return nfs_ok;
1053 if (args->opcnt != 1)
1054 return nfserr_not_only_op;
1055 return nfs_ok;
1056}
1057
1058static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1059{
1060 return &nfsd4_ops[op->opnum];
1061}
1062
1063bool nfsd4_cache_this_op(struct nfsd4_op *op)
1064{
1065 return OPDESC(op)->op_cacheresult;
1066}
1067
1068static bool need_wrongsec_check(struct svc_rqst *rqstp)
1069{
1070 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1071 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1072 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1073 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1074 struct nfsd4_operation *thisd;
1075 struct nfsd4_operation *nextd;
1076
1077 thisd = OPDESC(this);
1078 /*
1079 * Most ops check wronsec on our own; only the putfh-like ops
1080 * have special rules.
1081 */
1082 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1083 return false;
1084 /*
1085 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1086 * put-filehandle operation if we're not going to use the
1087 * result:
1088 */
1089 if (argp->opcnt == resp->opcnt)
1090 return false;
1091
1092 nextd = OPDESC(next);
1093 /*
1094 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1095 * errors themselves as necessary; others should check for them
1096 * now:
1097 */
1098 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1099}
1100
1101/*
1102 * COMPOUND call.
1103 */
1104static __be32
1105nfsd4_proc_compound(struct svc_rqst *rqstp,
1106 struct nfsd4_compoundargs *args,
1107 struct nfsd4_compoundres *resp)
1108{
1109 struct nfsd4_op *op;
1110 struct nfsd4_operation *opdesc;
1111 struct nfsd4_compound_state *cstate = &resp->cstate;
1112 int slack_bytes;
1113 __be32 status;
1114
1115 resp->xbuf = &rqstp->rq_res;
1116 resp->p = rqstp->rq_res.head[0].iov_base +
1117 rqstp->rq_res.head[0].iov_len;
1118 resp->tagp = resp->p;
1119 /* reserve space for: taglen, tag, and opcnt */
1120 resp->p += 2 + XDR_QUADLEN(args->taglen);
1121 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1122 resp->taglen = args->taglen;
1123 resp->tag = args->tag;
1124 resp->opcnt = 0;
1125 resp->rqstp = rqstp;
1126 resp->cstate.minorversion = args->minorversion;
1127 resp->cstate.replay_owner = NULL;
1128 resp->cstate.session = NULL;
1129 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1130 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1131 /*
1132 * Don't use the deferral mechanism for NFSv4; compounds make it
1133 * too hard to avoid non-idempotency problems.
1134 */
1135 rqstp->rq_usedeferral = 0;
1136
1137 /*
1138 * According to RFC3010, this takes precedence over all other errors.
1139 */
1140 status = nfserr_minor_vers_mismatch;
1141 if (args->minorversion > nfsd_supported_minorversion)
1142 goto out;
1143
1144 status = nfs41_check_op_ordering(args);
1145 if (status) {
1146 op = &args->ops[0];
1147 op->status = status;
1148 goto encode_op;
1149 }
1150
1151 while (!status && resp->opcnt < args->opcnt) {
1152 op = &args->ops[resp->opcnt++];
1153
1154 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1155 resp->opcnt, args->opcnt, op->opnum,
1156 nfsd4_op_name(op->opnum));
1157 /*
1158 * The XDR decode routines may have pre-set op->status;
1159 * for example, if there is a miscellaneous XDR error
1160 * it will be set to nfserr_bad_xdr.
1161 */
1162 if (op->status)
1163 goto encode_op;
1164
1165 /* We must be able to encode a successful response to
1166 * this operation, with enough room left over to encode a
1167 * failed response to the next operation. If we don't
1168 * have enough room, fail with ERR_RESOURCE.
1169 */
1170 slack_bytes = (char *)resp->end - (char *)resp->p;
1171 if (slack_bytes < COMPOUND_SLACK_SPACE
1172 + COMPOUND_ERR_SLACK_SPACE) {
1173 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1174 op->status = nfserr_resource;
1175 goto encode_op;
1176 }
1177
1178 opdesc = OPDESC(op);
1179
1180 if (!cstate->current_fh.fh_dentry) {
1181 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1182 op->status = nfserr_nofilehandle;
1183 goto encode_op;
1184 }
1185 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1186 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1187 op->status = nfserr_moved;
1188 goto encode_op;
1189 }
1190
1191 if (opdesc->op_func)
1192 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1193 else
1194 BUG_ON(op->status == nfs_ok);
1195
1196 if (!op->status && need_wrongsec_check(rqstp))
1197 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1198
1199encode_op:
1200 /* Only from SEQUENCE */
1201 if (resp->cstate.status == nfserr_replay_cache) {
1202 dprintk("%s NFS4.1 replay from cache\n", __func__);
1203 status = op->status;
1204 goto out;
1205 }
1206 if (op->status == nfserr_replay_me) {
1207 op->replay = &cstate->replay_owner->so_replay;
1208 nfsd4_encode_replay(resp, op);
1209 status = op->status = op->replay->rp_status;
1210 } else {
1211 nfsd4_encode_operation(resp, op);
1212 status = op->status;
1213 }
1214
1215 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1216 args->ops, args->opcnt, resp->opcnt, op->opnum,
1217 be32_to_cpu(status));
1218
1219 if (cstate->replay_owner) {
1220 nfs4_put_stateowner(cstate->replay_owner);
1221 cstate->replay_owner = NULL;
1222 }
1223 /* XXX Ugh, we need to get rid of this kind of special case: */
1224 if (op->opnum == OP_READ && op->u.read.rd_filp)
1225 fput(op->u.read.rd_filp);
1226
1227 nfsd4_increment_op_stats(op->opnum);
1228 }
1229
1230 resp->cstate.status = status;
1231 fh_put(&resp->cstate.current_fh);
1232 fh_put(&resp->cstate.save_fh);
1233 BUG_ON(resp->cstate.replay_owner);
1234out:
1235 /* Reset deferral mechanism for RPC deferrals */
1236 rqstp->rq_usedeferral = 1;
1237 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1238 return status;
1239}
1240
1241static struct nfsd4_operation nfsd4_ops[] = {
1242 [OP_ACCESS] = {
1243 .op_func = (nfsd4op_func)nfsd4_access,
1244 .op_name = "OP_ACCESS",
1245 },
1246 [OP_CLOSE] = {
1247 .op_func = (nfsd4op_func)nfsd4_close,
1248 .op_name = "OP_CLOSE",
1249 },
1250 [OP_COMMIT] = {
1251 .op_func = (nfsd4op_func)nfsd4_commit,
1252 .op_name = "OP_COMMIT",
1253 },
1254 [OP_CREATE] = {
1255 .op_func = (nfsd4op_func)nfsd4_create,
1256 .op_name = "OP_CREATE",
1257 .op_cacheresult = true,
1258 },
1259 [OP_DELEGRETURN] = {
1260 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1261 .op_name = "OP_DELEGRETURN",
1262 },
1263 [OP_GETATTR] = {
1264 .op_func = (nfsd4op_func)nfsd4_getattr,
1265 .op_flags = ALLOWED_ON_ABSENT_FS,
1266 .op_name = "OP_GETATTR",
1267 },
1268 [OP_GETFH] = {
1269 .op_func = (nfsd4op_func)nfsd4_getfh,
1270 .op_name = "OP_GETFH",
1271 },
1272 [OP_LINK] = {
1273 .op_func = (nfsd4op_func)nfsd4_link,
1274 .op_name = "OP_LINK",
1275 .op_cacheresult = true,
1276 },
1277 [OP_LOCK] = {
1278 .op_func = (nfsd4op_func)nfsd4_lock,
1279 .op_name = "OP_LOCK",
1280 },
1281 [OP_LOCKT] = {
1282 .op_func = (nfsd4op_func)nfsd4_lockt,
1283 .op_name = "OP_LOCKT",
1284 },
1285 [OP_LOCKU] = {
1286 .op_func = (nfsd4op_func)nfsd4_locku,
1287 .op_name = "OP_LOCKU",
1288 },
1289 [OP_LOOKUP] = {
1290 .op_func = (nfsd4op_func)nfsd4_lookup,
1291 .op_flags = OP_HANDLES_WRONGSEC,
1292 .op_name = "OP_LOOKUP",
1293 },
1294 [OP_LOOKUPP] = {
1295 .op_func = (nfsd4op_func)nfsd4_lookupp,
1296 .op_flags = OP_HANDLES_WRONGSEC,
1297 .op_name = "OP_LOOKUPP",
1298 },
1299 [OP_NVERIFY] = {
1300 .op_func = (nfsd4op_func)nfsd4_nverify,
1301 .op_name = "OP_NVERIFY",
1302 },
1303 [OP_OPEN] = {
1304 .op_func = (nfsd4op_func)nfsd4_open,
1305 .op_flags = OP_HANDLES_WRONGSEC,
1306 .op_name = "OP_OPEN",
1307 },
1308 [OP_OPEN_CONFIRM] = {
1309 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1310 .op_name = "OP_OPEN_CONFIRM",
1311 },
1312 [OP_OPEN_DOWNGRADE] = {
1313 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1314 .op_name = "OP_OPEN_DOWNGRADE",
1315 },
1316 [OP_PUTFH] = {
1317 .op_func = (nfsd4op_func)nfsd4_putfh,
1318 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1319 | OP_IS_PUTFH_LIKE,
1320 .op_name = "OP_PUTFH",
1321 },
1322 [OP_PUTPUBFH] = {
1323 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1324 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1325 | OP_IS_PUTFH_LIKE,
1326 .op_name = "OP_PUTPUBFH",
1327 },
1328 [OP_PUTROOTFH] = {
1329 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1330 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1331 | OP_IS_PUTFH_LIKE,
1332 .op_name = "OP_PUTROOTFH",
1333 },
1334 [OP_READ] = {
1335 .op_func = (nfsd4op_func)nfsd4_read,
1336 .op_name = "OP_READ",
1337 },
1338 [OP_READDIR] = {
1339 .op_func = (nfsd4op_func)nfsd4_readdir,
1340 .op_name = "OP_READDIR",
1341 },
1342 [OP_READLINK] = {
1343 .op_func = (nfsd4op_func)nfsd4_readlink,
1344 .op_name = "OP_READLINK",
1345 },
1346 [OP_REMOVE] = {
1347 .op_func = (nfsd4op_func)nfsd4_remove,
1348 .op_name = "OP_REMOVE",
1349 .op_cacheresult = true,
1350 },
1351 [OP_RENAME] = {
1352 .op_name = "OP_RENAME",
1353 .op_func = (nfsd4op_func)nfsd4_rename,
1354 .op_cacheresult = true,
1355 },
1356 [OP_RENEW] = {
1357 .op_func = (nfsd4op_func)nfsd4_renew,
1358 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1359 .op_name = "OP_RENEW",
1360 },
1361 [OP_RESTOREFH] = {
1362 .op_func = (nfsd4op_func)nfsd4_restorefh,
1363 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1364 | OP_IS_PUTFH_LIKE,
1365 .op_name = "OP_RESTOREFH",
1366 },
1367 [OP_SAVEFH] = {
1368 .op_func = (nfsd4op_func)nfsd4_savefh,
1369 .op_flags = OP_HANDLES_WRONGSEC,
1370 .op_name = "OP_SAVEFH",
1371 },
1372 [OP_SECINFO] = {
1373 .op_func = (nfsd4op_func)nfsd4_secinfo,
1374 .op_flags = OP_HANDLES_WRONGSEC,
1375 .op_name = "OP_SECINFO",
1376 },
1377 [OP_SETATTR] = {
1378 .op_func = (nfsd4op_func)nfsd4_setattr,
1379 .op_name = "OP_SETATTR",
1380 .op_cacheresult = true,
1381 },
1382 [OP_SETCLIENTID] = {
1383 .op_func = (nfsd4op_func)nfsd4_setclientid,
1384 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1385 .op_name = "OP_SETCLIENTID",
1386 .op_cacheresult = true,
1387 },
1388 [OP_SETCLIENTID_CONFIRM] = {
1389 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1390 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1391 .op_name = "OP_SETCLIENTID_CONFIRM",
1392 .op_cacheresult = true,
1393 },
1394 [OP_VERIFY] = {
1395 .op_func = (nfsd4op_func)nfsd4_verify,
1396 .op_name = "OP_VERIFY",
1397 },
1398 [OP_WRITE] = {
1399 .op_func = (nfsd4op_func)nfsd4_write,
1400 .op_name = "OP_WRITE",
1401 .op_cacheresult = true,
1402 },
1403 [OP_RELEASE_LOCKOWNER] = {
1404 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1405 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1406 .op_name = "OP_RELEASE_LOCKOWNER",
1407 },
1408
1409 /* NFSv4.1 operations */
1410 [OP_EXCHANGE_ID] = {
1411 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1412 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1413 .op_name = "OP_EXCHANGE_ID",
1414 },
1415 [OP_BIND_CONN_TO_SESSION] = {
1416 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1417 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1418 .op_name = "OP_BIND_CONN_TO_SESSION",
1419 },
1420 [OP_CREATE_SESSION] = {
1421 .op_func = (nfsd4op_func)nfsd4_create_session,
1422 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1423 .op_name = "OP_CREATE_SESSION",
1424 },
1425 [OP_DESTROY_SESSION] = {
1426 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1427 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1428 .op_name = "OP_DESTROY_SESSION",
1429 },
1430 [OP_SEQUENCE] = {
1431 .op_func = (nfsd4op_func)nfsd4_sequence,
1432 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1433 .op_name = "OP_SEQUENCE",
1434 },
1435 [OP_DESTROY_CLIENTID] = {
1436 .op_func = NULL,
1437 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1438 .op_name = "OP_DESTROY_CLIENTID",
1439 },
1440 [OP_RECLAIM_COMPLETE] = {
1441 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1442 .op_flags = ALLOWED_WITHOUT_FH,
1443 .op_name = "OP_RECLAIM_COMPLETE",
1444 },
1445 [OP_SECINFO_NO_NAME] = {
1446 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1447 .op_flags = OP_HANDLES_WRONGSEC,
1448 .op_name = "OP_SECINFO_NO_NAME",
1449 },
1450 [OP_TEST_STATEID] = {
1451 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1452 .op_flags = ALLOWED_WITHOUT_FH,
1453 .op_name = "OP_TEST_STATEID",
1454 },
1455 [OP_FREE_STATEID] = {
1456 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1457 .op_flags = ALLOWED_WITHOUT_FH,
1458 .op_name = "OP_FREE_STATEID",
1459 },
1460};
1461
1462static const char *nfsd4_op_name(unsigned opnum)
1463{
1464 if (opnum < ARRAY_SIZE(nfsd4_ops))
1465 return nfsd4_ops[opnum].op_name;
1466 return "unknown_operation";
1467}
1468
1469#define nfsd4_voidres nfsd4_voidargs
1470struct nfsd4_voidargs { int dummy; };
1471
1472static struct svc_procedure nfsd_procedures4[2] = {
1473 [NFSPROC4_NULL] = {
1474 .pc_func = (svc_procfunc) nfsd4_proc_null,
1475 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1476 .pc_argsize = sizeof(struct nfsd4_voidargs),
1477 .pc_ressize = sizeof(struct nfsd4_voidres),
1478 .pc_cachetype = RC_NOCACHE,
1479 .pc_xdrressize = 1,
1480 },
1481 [NFSPROC4_COMPOUND] = {
1482 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1483 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1484 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1485 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1486 .pc_ressize = sizeof(struct nfsd4_compoundres),
1487 .pc_release = nfsd4_release_compoundargs,
1488 .pc_cachetype = RC_NOCACHE,
1489 .pc_xdrressize = NFSD_BUFSIZE/4,
1490 },
1491};
1492
1493struct svc_version nfsd_version4 = {
1494 .vs_vers = 4,
1495 .vs_nproc = 2,
1496 .vs_proc = nfsd_procedures4,
1497 .vs_dispatch = nfsd_dispatch,
1498 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1499};
1500
1501/*
1502 * Local variables:
1503 * c-basic-offset: 8
1504 * End:
1505 */
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/fs_struct.h>
36#include <linux/file.h>
37#include <linux/falloc.h>
38#include <linux/slab.h>
39#include <linux/kthread.h>
40#include <linux/sunrpc/addr.h>
41#include <linux/nfs_ssc.h>
42
43#include "idmap.h"
44#include "cache.h"
45#include "xdr4.h"
46#include "vfs.h"
47#include "current_stateid.h"
48#include "netns.h"
49#include "acl.h"
50#include "pnfs.h"
51#include "trace.h"
52
53static bool inter_copy_offload_enable;
54module_param(inter_copy_offload_enable, bool, 0644);
55MODULE_PARM_DESC(inter_copy_offload_enable,
56 "Enable inter server to server copy offload. Default: false");
57
58#ifdef CONFIG_NFSD_V4_2_INTER_SSC
59static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
60module_param(nfsd4_ssc_umount_timeout, int, 0644);
61MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
62 "idle msecs before unmount export from source server");
63#endif
64
65#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
66#include <linux/security.h>
67
68static inline void
69nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
70{
71 struct inode *inode = d_inode(resfh->fh_dentry);
72 int status;
73
74 inode_lock(inode);
75 status = security_inode_setsecctx(resfh->fh_dentry,
76 label->data, label->len);
77 inode_unlock(inode);
78
79 if (status)
80 /*
81 * XXX: We should really fail the whole open, but we may
82 * already have created a new file, so it may be too
83 * late. For now this seems the least of evils:
84 */
85 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
86
87 return;
88}
89#else
90static inline void
91nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
92{ }
93#endif
94
95#define NFSDDBG_FACILITY NFSDDBG_PROC
96
97static u32 nfsd_attrmask[] = {
98 NFSD_WRITEABLE_ATTRS_WORD0,
99 NFSD_WRITEABLE_ATTRS_WORD1,
100 NFSD_WRITEABLE_ATTRS_WORD2
101};
102
103static u32 nfsd41_ex_attrmask[] = {
104 NFSD_SUPPATTR_EXCLCREAT_WORD0,
105 NFSD_SUPPATTR_EXCLCREAT_WORD1,
106 NFSD_SUPPATTR_EXCLCREAT_WORD2
107};
108
109static __be32
110check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
111 u32 *bmval, u32 *writable)
112{
113 struct dentry *dentry = cstate->current_fh.fh_dentry;
114 struct svc_export *exp = cstate->current_fh.fh_export;
115
116 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
117 return nfserr_attrnotsupp;
118 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
119 return nfserr_attrnotsupp;
120 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
121 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
122 return nfserr_attrnotsupp;
123 if (writable && !bmval_is_subset(bmval, writable))
124 return nfserr_inval;
125 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
126 (bmval[1] & FATTR4_WORD1_MODE))
127 return nfserr_inval;
128 return nfs_ok;
129}
130
131static __be32
132nfsd4_check_open_attributes(struct svc_rqst *rqstp,
133 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
134{
135 __be32 status = nfs_ok;
136
137 if (open->op_create == NFS4_OPEN_CREATE) {
138 if (open->op_createmode == NFS4_CREATE_UNCHECKED
139 || open->op_createmode == NFS4_CREATE_GUARDED)
140 status = check_attr_support(rqstp, cstate,
141 open->op_bmval, nfsd_attrmask);
142 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
143 status = check_attr_support(rqstp, cstate,
144 open->op_bmval, nfsd41_ex_attrmask);
145 }
146
147 return status;
148}
149
150static int
151is_create_with_attrs(struct nfsd4_open *open)
152{
153 return open->op_create == NFS4_OPEN_CREATE
154 && (open->op_createmode == NFS4_CREATE_UNCHECKED
155 || open->op_createmode == NFS4_CREATE_GUARDED
156 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
157}
158
159/*
160 * if error occurs when setting the acl, just clear the acl bit
161 * in the returned attr bitmap.
162 */
163static void
164do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
165 struct nfs4_acl *acl, u32 *bmval)
166{
167 __be32 status;
168
169 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
170 if (status)
171 /*
172 * We should probably fail the whole open at this point,
173 * but we've already created the file, so it's too late;
174 * So this seems the least of evils:
175 */
176 bmval[0] &= ~FATTR4_WORD0_ACL;
177}
178
179static inline void
180fh_dup2(struct svc_fh *dst, struct svc_fh *src)
181{
182 fh_put(dst);
183 dget(src->fh_dentry);
184 if (src->fh_export)
185 exp_get(src->fh_export);
186 *dst = *src;
187}
188
189static __be32
190do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
191{
192 __be32 status;
193
194 if (open->op_truncate &&
195 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
196 return nfserr_inval;
197
198 accmode |= NFSD_MAY_READ_IF_EXEC;
199
200 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
201 accmode |= NFSD_MAY_READ;
202 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
203 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
204 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
205 accmode |= NFSD_MAY_WRITE;
206
207 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
208
209 return status;
210}
211
212static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
213{
214 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
215
216 if (S_ISREG(mode))
217 return nfs_ok;
218 if (S_ISDIR(mode))
219 return nfserr_isdir;
220 /*
221 * Using err_symlink as our catch-all case may look odd; but
222 * there's no other obvious error for this case in 4.0, and we
223 * happen to know that it will cause the linux v4 client to do
224 * the right thing on attempts to open something other than a
225 * regular file.
226 */
227 return nfserr_symlink;
228}
229
230static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
231{
232 if (nfsd4_has_session(cstate))
233 return;
234 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
235 &resfh->fh_handle);
236}
237
238static __be32
239do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
240{
241 struct svc_fh *current_fh = &cstate->current_fh;
242 int accmode;
243 __be32 status;
244
245 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
246 if (!*resfh)
247 return nfserr_jukebox;
248 fh_init(*resfh, NFS4_FHSIZE);
249 open->op_truncate = false;
250
251 if (open->op_create) {
252 /* FIXME: check session persistence and pnfs flags.
253 * The nfsv4.1 spec requires the following semantics:
254 *
255 * Persistent | pNFS | Server REQUIRED | Client Allowed
256 * Reply Cache | server | |
257 * -------------+--------+-----------------+--------------------
258 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
259 * | | | (SHOULD)
260 * | | and EXCLUSIVE4 | or EXCLUSIVE4
261 * | | | (SHOULD NOT)
262 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
263 * yes | no | GUARDED4 | GUARDED4
264 * yes | yes | GUARDED4 | GUARDED4
265 */
266
267 /*
268 * Note: create modes (UNCHECKED,GUARDED...) are the same
269 * in NFSv4 as in v3 except EXCLUSIVE4_1.
270 */
271 current->fs->umask = open->op_umask;
272 status = do_nfsd_create(rqstp, current_fh, open->op_fname,
273 open->op_fnamelen, &open->op_iattr,
274 *resfh, open->op_createmode,
275 (u32 *)open->op_verf.data,
276 &open->op_truncate, &open->op_created);
277 current->fs->umask = 0;
278
279 if (!status && open->op_label.len)
280 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
281
282 /*
283 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
284 * use the returned bitmask to indicate which attributes
285 * we used to store the verifier:
286 */
287 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
288 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
289 FATTR4_WORD1_TIME_MODIFY);
290 } else
291 /*
292 * Note this may exit with the parent still locked.
293 * We will hold the lock until nfsd4_open's final
294 * lookup, to prevent renames or unlinks until we've had
295 * a chance to an acquire a delegation if appropriate.
296 */
297 status = nfsd_lookup(rqstp, current_fh,
298 open->op_fname, open->op_fnamelen, *resfh);
299 if (status)
300 goto out;
301 status = nfsd_check_obj_isreg(*resfh);
302 if (status)
303 goto out;
304
305 if (is_create_with_attrs(open) && open->op_acl != NULL)
306 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
307
308 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
309 accmode = NFSD_MAY_NOP;
310 if (open->op_created ||
311 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
312 accmode |= NFSD_MAY_OWNER_OVERRIDE;
313 status = do_open_permission(rqstp, *resfh, open, accmode);
314 set_change_info(&open->op_cinfo, current_fh);
315out:
316 return status;
317}
318
319static __be32
320do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
321{
322 struct svc_fh *current_fh = &cstate->current_fh;
323 __be32 status;
324 int accmode = 0;
325
326 /* We don't know the target directory, and therefore can not
327 * set the change info
328 */
329
330 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
331
332 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
333
334 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
335 (open->op_iattr.ia_size == 0);
336 /*
337 * In the delegation case, the client is telling us about an
338 * open that it *already* performed locally, some time ago. We
339 * should let it succeed now if possible.
340 *
341 * In the case of a CLAIM_FH open, on the other hand, the client
342 * may be counting on us to enforce permissions (the Linux 4.1
343 * client uses this for normal opens, for example).
344 */
345 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
346 accmode = NFSD_MAY_OWNER_OVERRIDE;
347
348 status = do_open_permission(rqstp, current_fh, open, accmode);
349
350 return status;
351}
352
353static void
354copy_clientid(clientid_t *clid, struct nfsd4_session *session)
355{
356 struct nfsd4_sessionid *sid =
357 (struct nfsd4_sessionid *)session->se_sessionid.data;
358
359 clid->cl_boot = sid->clientid.cl_boot;
360 clid->cl_id = sid->clientid.cl_id;
361}
362
363static __be32
364nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
365 union nfsd4_op_u *u)
366{
367 struct nfsd4_open *open = &u->open;
368 __be32 status;
369 struct svc_fh *resfh = NULL;
370 struct net *net = SVC_NET(rqstp);
371 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
372 bool reclaim = false;
373
374 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
375 (int)open->op_fnamelen, open->op_fname,
376 open->op_openowner);
377
378 /* This check required by spec. */
379 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
380 return nfserr_inval;
381
382 open->op_created = false;
383 /*
384 * RFC5661 18.51.3
385 * Before RECLAIM_COMPLETE done, server should deny new lock
386 */
387 if (nfsd4_has_session(cstate) &&
388 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
389 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
390 return nfserr_grace;
391
392 if (nfsd4_has_session(cstate))
393 copy_clientid(&open->op_clientid, cstate->session);
394
395 /* check seqid for replay. set nfs4_owner */
396 status = nfsd4_process_open1(cstate, open, nn);
397 if (status == nfserr_replay_me) {
398 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
399 fh_put(&cstate->current_fh);
400 fh_copy_shallow(&cstate->current_fh.fh_handle,
401 &rp->rp_openfh);
402 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
403 if (status)
404 dprintk("nfsd4_open: replay failed"
405 " restoring previous filehandle\n");
406 else
407 status = nfserr_replay_me;
408 }
409 if (status)
410 goto out;
411 if (open->op_xdr_error) {
412 status = open->op_xdr_error;
413 goto out;
414 }
415
416 status = nfsd4_check_open_attributes(rqstp, cstate, open);
417 if (status)
418 goto out;
419
420 /* Openowner is now set, so sequence id will get bumped. Now we need
421 * these checks before we do any creates: */
422 status = nfserr_grace;
423 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
424 goto out;
425 status = nfserr_no_grace;
426 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
427 goto out;
428
429 switch (open->op_claim_type) {
430 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
431 case NFS4_OPEN_CLAIM_NULL:
432 status = do_open_lookup(rqstp, cstate, open, &resfh);
433 if (status)
434 goto out;
435 break;
436 case NFS4_OPEN_CLAIM_PREVIOUS:
437 status = nfs4_check_open_reclaim(cstate->clp);
438 if (status)
439 goto out;
440 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
441 reclaim = true;
442 fallthrough;
443 case NFS4_OPEN_CLAIM_FH:
444 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
445 status = do_open_fhandle(rqstp, cstate, open);
446 if (status)
447 goto out;
448 resfh = &cstate->current_fh;
449 break;
450 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
451 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
452 dprintk("NFSD: unsupported OPEN claim type %d\n",
453 open->op_claim_type);
454 status = nfserr_notsupp;
455 goto out;
456 default:
457 dprintk("NFSD: Invalid OPEN claim type %d\n",
458 open->op_claim_type);
459 status = nfserr_inval;
460 goto out;
461 }
462 /*
463 * nfsd4_process_open2() does the actual opening of the file. If
464 * successful, it (1) truncates the file if open->op_truncate was
465 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
466 */
467 status = nfsd4_process_open2(rqstp, resfh, open);
468 WARN(status && open->op_created,
469 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
470 be32_to_cpu(status));
471 if (reclaim && !status)
472 nn->somebody_reclaimed = true;
473out:
474 if (resfh && resfh != &cstate->current_fh) {
475 fh_dup2(&cstate->current_fh, resfh);
476 fh_put(resfh);
477 kfree(resfh);
478 }
479 nfsd4_cleanup_open_state(cstate, open);
480 nfsd4_bump_seqid(cstate, status);
481 return status;
482}
483
484/*
485 * OPEN is the only seqid-mutating operation whose decoding can fail
486 * with a seqid-mutating error (specifically, decoding of user names in
487 * the attributes). Therefore we have to do some processing to look up
488 * the stateowner so that we can bump the seqid.
489 */
490static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
491{
492 struct nfsd4_open *open = &op->u.open;
493
494 if (!seqid_mutating_err(ntohl(op->status)))
495 return op->status;
496 if (nfsd4_has_session(cstate))
497 return op->status;
498 open->op_xdr_error = op->status;
499 return nfsd4_open(rqstp, cstate, &op->u);
500}
501
502/*
503 * filehandle-manipulating ops.
504 */
505static __be32
506nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
507 union nfsd4_op_u *u)
508{
509 u->getfh = &cstate->current_fh;
510 return nfs_ok;
511}
512
513static __be32
514nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
515 union nfsd4_op_u *u)
516{
517 struct nfsd4_putfh *putfh = &u->putfh;
518 __be32 ret;
519
520 fh_put(&cstate->current_fh);
521 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
522 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
523 putfh->pf_fhlen);
524 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
525#ifdef CONFIG_NFSD_V4_2_INTER_SSC
526 if (ret == nfserr_stale && putfh->no_verify) {
527 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
528 ret = 0;
529 }
530#endif
531 return ret;
532}
533
534static __be32
535nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
536 union nfsd4_op_u *u)
537{
538 __be32 status;
539
540 fh_put(&cstate->current_fh);
541 status = exp_pseudoroot(rqstp, &cstate->current_fh);
542 return status;
543}
544
545static __be32
546nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 union nfsd4_op_u *u)
548{
549 if (!cstate->save_fh.fh_dentry)
550 return nfserr_restorefh;
551
552 fh_dup2(&cstate->current_fh, &cstate->save_fh);
553 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
554 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
555 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
556 }
557 return nfs_ok;
558}
559
560static __be32
561nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
562 union nfsd4_op_u *u)
563{
564 fh_dup2(&cstate->save_fh, &cstate->current_fh);
565 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
566 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
567 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
568 }
569 return nfs_ok;
570}
571
572/*
573 * misc nfsv4 ops
574 */
575static __be32
576nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
577 union nfsd4_op_u *u)
578{
579 struct nfsd4_access *access = &u->access;
580 u32 access_full;
581
582 access_full = NFS3_ACCESS_FULL;
583 if (cstate->minorversion >= 2)
584 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
585 NFS4_ACCESS_XAWRITE;
586
587 if (access->ac_req_access & ~access_full)
588 return nfserr_inval;
589
590 access->ac_resp_access = access->ac_req_access;
591 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
592 &access->ac_supported);
593}
594
595static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
596{
597 __be32 *verf = (__be32 *)verifier->data;
598
599 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
600
601 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
602}
603
604static __be32
605nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
606 union nfsd4_op_u *u)
607{
608 struct nfsd4_commit *commit = &u->commit;
609
610 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
611 commit->co_count,
612 (__be32 *)commit->co_verf.data);
613}
614
615static __be32
616nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
617 union nfsd4_op_u *u)
618{
619 struct nfsd4_create *create = &u->create;
620 struct svc_fh resfh;
621 __be32 status;
622 dev_t rdev;
623
624 fh_init(&resfh, NFS4_FHSIZE);
625
626 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
627 if (status)
628 return status;
629
630 status = check_attr_support(rqstp, cstate, create->cr_bmval,
631 nfsd_attrmask);
632 if (status)
633 return status;
634
635 current->fs->umask = create->cr_umask;
636 switch (create->cr_type) {
637 case NF4LNK:
638 status = nfsd_symlink(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 create->cr_data, &resfh);
641 break;
642
643 case NF4BLK:
644 status = nfserr_inval;
645 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
646 if (MAJOR(rdev) != create->cr_specdata1 ||
647 MINOR(rdev) != create->cr_specdata2)
648 goto out_umask;
649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr, S_IFBLK, rdev, &resfh);
652 break;
653
654 case NF4CHR:
655 status = nfserr_inval;
656 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
657 if (MAJOR(rdev) != create->cr_specdata1 ||
658 MINOR(rdev) != create->cr_specdata2)
659 goto out_umask;
660 status = nfsd_create(rqstp, &cstate->current_fh,
661 create->cr_name, create->cr_namelen,
662 &create->cr_iattr,S_IFCHR, rdev, &resfh);
663 break;
664
665 case NF4SOCK:
666 status = nfsd_create(rqstp, &cstate->current_fh,
667 create->cr_name, create->cr_namelen,
668 &create->cr_iattr, S_IFSOCK, 0, &resfh);
669 break;
670
671 case NF4FIFO:
672 status = nfsd_create(rqstp, &cstate->current_fh,
673 create->cr_name, create->cr_namelen,
674 &create->cr_iattr, S_IFIFO, 0, &resfh);
675 break;
676
677 case NF4DIR:
678 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
679 status = nfsd_create(rqstp, &cstate->current_fh,
680 create->cr_name, create->cr_namelen,
681 &create->cr_iattr, S_IFDIR, 0, &resfh);
682 break;
683
684 default:
685 status = nfserr_badtype;
686 }
687
688 if (status)
689 goto out;
690
691 if (create->cr_label.len)
692 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
693
694 if (create->cr_acl != NULL)
695 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
696 create->cr_bmval);
697
698 fh_unlock(&cstate->current_fh);
699 set_change_info(&create->cr_cinfo, &cstate->current_fh);
700 fh_dup2(&cstate->current_fh, &resfh);
701out:
702 fh_put(&resfh);
703out_umask:
704 current->fs->umask = 0;
705 return status;
706}
707
708static __be32
709nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
710 union nfsd4_op_u *u)
711{
712 struct nfsd4_getattr *getattr = &u->getattr;
713 __be32 status;
714
715 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
716 if (status)
717 return status;
718
719 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
720 return nfserr_inval;
721
722 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
723 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
724 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
725
726 getattr->ga_fhp = &cstate->current_fh;
727 return nfs_ok;
728}
729
730static __be32
731nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
732 union nfsd4_op_u *u)
733{
734 struct nfsd4_link *link = &u->link;
735 __be32 status;
736
737 status = nfsd_link(rqstp, &cstate->current_fh,
738 link->li_name, link->li_namelen, &cstate->save_fh);
739 if (!status)
740 set_change_info(&link->li_cinfo, &cstate->current_fh);
741 return status;
742}
743
744static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
745{
746 struct svc_fh tmp_fh;
747 __be32 ret;
748
749 fh_init(&tmp_fh, NFS4_FHSIZE);
750 ret = exp_pseudoroot(rqstp, &tmp_fh);
751 if (ret)
752 return ret;
753 if (tmp_fh.fh_dentry == fh->fh_dentry) {
754 fh_put(&tmp_fh);
755 return nfserr_noent;
756 }
757 fh_put(&tmp_fh);
758 return nfsd_lookup(rqstp, fh, "..", 2, fh);
759}
760
761static __be32
762nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
763 union nfsd4_op_u *u)
764{
765 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
766}
767
768static __be32
769nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
770 union nfsd4_op_u *u)
771{
772 return nfsd_lookup(rqstp, &cstate->current_fh,
773 u->lookup.lo_name, u->lookup.lo_len,
774 &cstate->current_fh);
775}
776
777static __be32
778nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
779 union nfsd4_op_u *u)
780{
781 struct nfsd4_read *read = &u->read;
782 __be32 status;
783
784 read->rd_nf = NULL;
785 if (read->rd_offset >= OFFSET_MAX)
786 return nfserr_inval;
787
788 trace_nfsd_read_start(rqstp, &cstate->current_fh,
789 read->rd_offset, read->rd_length);
790
791 /*
792 * If we do a zero copy read, then a client will see read data
793 * that reflects the state of the file *after* performing the
794 * following compound.
795 *
796 * To ensure proper ordering, we therefore turn off zero copy if
797 * the client wants us to do more in this compound:
798 */
799 if (!nfsd4_last_compound_op(rqstp))
800 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
801
802 /* check stateid */
803 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
804 &read->rd_stateid, RD_STATE,
805 &read->rd_nf, NULL);
806 if (status) {
807 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
808 goto out;
809 }
810 status = nfs_ok;
811out:
812 read->rd_rqstp = rqstp;
813 read->rd_fhp = &cstate->current_fh;
814 return status;
815}
816
817
818static void
819nfsd4_read_release(union nfsd4_op_u *u)
820{
821 if (u->read.rd_nf)
822 nfsd_file_put(u->read.rd_nf);
823 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
824 u->read.rd_offset, u->read.rd_length);
825}
826
827static __be32
828nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
829 union nfsd4_op_u *u)
830{
831 struct nfsd4_readdir *readdir = &u->readdir;
832 u64 cookie = readdir->rd_cookie;
833 static const nfs4_verifier zeroverf;
834
835 /* no need to check permission - this will be done in nfsd_readdir() */
836
837 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
838 return nfserr_inval;
839
840 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
841 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
842 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
843
844 if ((cookie == 1) || (cookie == 2) ||
845 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
846 return nfserr_bad_cookie;
847
848 readdir->rd_rqstp = rqstp;
849 readdir->rd_fhp = &cstate->current_fh;
850 return nfs_ok;
851}
852
853static __be32
854nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
855 union nfsd4_op_u *u)
856{
857 u->readlink.rl_rqstp = rqstp;
858 u->readlink.rl_fhp = &cstate->current_fh;
859 return nfs_ok;
860}
861
862static __be32
863nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 union nfsd4_op_u *u)
865{
866 struct nfsd4_remove *remove = &u->remove;
867 __be32 status;
868
869 if (opens_in_grace(SVC_NET(rqstp)))
870 return nfserr_grace;
871 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
872 remove->rm_name, remove->rm_namelen);
873 if (!status) {
874 fh_unlock(&cstate->current_fh);
875 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
876 }
877 return status;
878}
879
880static __be32
881nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
882 union nfsd4_op_u *u)
883{
884 struct nfsd4_rename *rename = &u->rename;
885 __be32 status;
886
887 if (opens_in_grace(SVC_NET(rqstp)))
888 return nfserr_grace;
889 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
890 rename->rn_snamelen, &cstate->current_fh,
891 rename->rn_tname, rename->rn_tnamelen);
892 if (status)
893 return status;
894 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
895 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
896 return nfs_ok;
897}
898
899static __be32
900nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
901 union nfsd4_op_u *u)
902{
903 struct nfsd4_secinfo *secinfo = &u->secinfo;
904 struct svc_export *exp;
905 struct dentry *dentry;
906 __be32 err;
907
908 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
909 if (err)
910 return err;
911 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
912 secinfo->si_name, secinfo->si_namelen,
913 &exp, &dentry);
914 if (err)
915 return err;
916 fh_unlock(&cstate->current_fh);
917 if (d_really_is_negative(dentry)) {
918 exp_put(exp);
919 err = nfserr_noent;
920 } else
921 secinfo->si_exp = exp;
922 dput(dentry);
923 if (cstate->minorversion)
924 /* See rfc 5661 section 2.6.3.1.1.8 */
925 fh_put(&cstate->current_fh);
926 return err;
927}
928
929static __be32
930nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
931 union nfsd4_op_u *u)
932{
933 __be32 err;
934
935 switch (u->secinfo_no_name.sin_style) {
936 case NFS4_SECINFO_STYLE4_CURRENT_FH:
937 break;
938 case NFS4_SECINFO_STYLE4_PARENT:
939 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
940 if (err)
941 return err;
942 break;
943 default:
944 return nfserr_inval;
945 }
946
947 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
948 fh_put(&cstate->current_fh);
949 return nfs_ok;
950}
951
952static void
953nfsd4_secinfo_release(union nfsd4_op_u *u)
954{
955 if (u->secinfo.si_exp)
956 exp_put(u->secinfo.si_exp);
957}
958
959static void
960nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
961{
962 if (u->secinfo_no_name.sin_exp)
963 exp_put(u->secinfo_no_name.sin_exp);
964}
965
966static __be32
967nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
968 union nfsd4_op_u *u)
969{
970 struct nfsd4_setattr *setattr = &u->setattr;
971 __be32 status = nfs_ok;
972 int err;
973
974 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
975 status = nfs4_preprocess_stateid_op(rqstp, cstate,
976 &cstate->current_fh, &setattr->sa_stateid,
977 WR_STATE, NULL, NULL);
978 if (status) {
979 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
980 return status;
981 }
982 }
983 err = fh_want_write(&cstate->current_fh);
984 if (err)
985 return nfserrno(err);
986 status = nfs_ok;
987
988 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
989 nfsd_attrmask);
990 if (status)
991 goto out;
992
993 if (setattr->sa_acl != NULL)
994 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
995 setattr->sa_acl);
996 if (status)
997 goto out;
998 if (setattr->sa_label.len)
999 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
1000 &setattr->sa_label);
1001 if (status)
1002 goto out;
1003 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1004 0, (time64_t)0);
1005out:
1006 fh_drop_write(&cstate->current_fh);
1007 return status;
1008}
1009
1010static __be32
1011nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1012 union nfsd4_op_u *u)
1013{
1014 struct nfsd4_write *write = &u->write;
1015 stateid_t *stateid = &write->wr_stateid;
1016 struct nfsd_file *nf = NULL;
1017 __be32 status = nfs_ok;
1018 unsigned long cnt;
1019 int nvecs;
1020
1021 if (write->wr_offset >= OFFSET_MAX)
1022 return nfserr_inval;
1023
1024 cnt = write->wr_buflen;
1025 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1026 write->wr_offset, cnt);
1027 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1028 stateid, WR_STATE, &nf, NULL);
1029 if (status) {
1030 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1031 return status;
1032 }
1033
1034 write->wr_how_written = write->wr_stable_how;
1035
1036 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages,
1037 write->wr_payload.head, write->wr_buflen);
1038 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1039
1040 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1041 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1042 write->wr_how_written,
1043 (__be32 *)write->wr_verifier.data);
1044 nfsd_file_put(nf);
1045
1046 write->wr_bytes_written = cnt;
1047 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1048 write->wr_offset, cnt);
1049 return status;
1050}
1051
1052static __be32
1053nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1054 stateid_t *src_stateid, struct nfsd_file **src,
1055 stateid_t *dst_stateid, struct nfsd_file **dst)
1056{
1057 __be32 status;
1058
1059 if (!cstate->save_fh.fh_dentry)
1060 return nfserr_nofilehandle;
1061
1062 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1063 src_stateid, RD_STATE, src, NULL);
1064 if (status) {
1065 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1066 goto out;
1067 }
1068
1069 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1070 dst_stateid, WR_STATE, dst, NULL);
1071 if (status) {
1072 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1073 goto out_put_src;
1074 }
1075
1076 /* fix up for NFS-specific error code */
1077 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1078 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1079 status = nfserr_wrong_type;
1080 goto out_put_dst;
1081 }
1082
1083out:
1084 return status;
1085out_put_dst:
1086 nfsd_file_put(*dst);
1087out_put_src:
1088 nfsd_file_put(*src);
1089 goto out;
1090}
1091
1092static __be32
1093nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1094 union nfsd4_op_u *u)
1095{
1096 struct nfsd4_clone *clone = &u->clone;
1097 struct nfsd_file *src, *dst;
1098 __be32 status;
1099
1100 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1101 &clone->cl_dst_stateid, &dst);
1102 if (status)
1103 goto out;
1104
1105 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1106 dst, clone->cl_dst_pos, clone->cl_count,
1107 EX_ISSYNC(cstate->current_fh.fh_export));
1108
1109 nfsd_file_put(dst);
1110 nfsd_file_put(src);
1111out:
1112 return status;
1113}
1114
1115void nfs4_put_copy(struct nfsd4_copy *copy)
1116{
1117 if (!refcount_dec_and_test(©->refcount))
1118 return;
1119 kfree(copy);
1120}
1121
1122static bool
1123check_and_set_stop_copy(struct nfsd4_copy *copy)
1124{
1125 bool value;
1126
1127 spin_lock(©->cp_clp->async_lock);
1128 value = copy->stopped;
1129 if (!copy->stopped)
1130 copy->stopped = true;
1131 spin_unlock(©->cp_clp->async_lock);
1132 return value;
1133}
1134
1135static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1136{
1137 /* only 1 thread should stop the copy */
1138 if (!check_and_set_stop_copy(copy))
1139 kthread_stop(copy->copy_task);
1140 nfs4_put_copy(copy);
1141}
1142
1143static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1144{
1145 struct nfsd4_copy *copy = NULL;
1146
1147 spin_lock(&clp->async_lock);
1148 if (!list_empty(&clp->async_copies)) {
1149 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1150 copies);
1151 refcount_inc(©->refcount);
1152 }
1153 spin_unlock(&clp->async_lock);
1154 return copy;
1155}
1156
1157void nfsd4_shutdown_copy(struct nfs4_client *clp)
1158{
1159 struct nfsd4_copy *copy;
1160
1161 while ((copy = nfsd4_get_copy(clp)) != NULL)
1162 nfsd4_stop_copy(copy);
1163}
1164#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1165
1166extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1167 struct nfs_fh *src_fh,
1168 nfs4_stateid *stateid);
1169extern void nfs42_ssc_close(struct file *filep);
1170
1171extern void nfs_sb_deactive(struct super_block *sb);
1172
1173#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1174
1175/*
1176 * setup a work entry in the ssc delayed unmount list.
1177 */
1178static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
1179 struct nfsd4_ssc_umount_item **retwork, struct vfsmount **ss_mnt)
1180{
1181 struct nfsd4_ssc_umount_item *ni = 0;
1182 struct nfsd4_ssc_umount_item *work = NULL;
1183 struct nfsd4_ssc_umount_item *tmp;
1184 DEFINE_WAIT(wait);
1185
1186 *ss_mnt = NULL;
1187 *retwork = NULL;
1188 work = kzalloc(sizeof(*work), GFP_KERNEL);
1189try_again:
1190 spin_lock(&nn->nfsd_ssc_lock);
1191 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1192 if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
1193 continue;
1194 /* found a match */
1195 if (ni->nsui_busy) {
1196 /* wait - and try again */
1197 prepare_to_wait(&nn->nfsd_ssc_waitq, &wait,
1198 TASK_INTERRUPTIBLE);
1199 spin_unlock(&nn->nfsd_ssc_lock);
1200
1201 /* allow 20secs for mount/unmount for now - revisit */
1202 if (signal_pending(current) ||
1203 (schedule_timeout(20*HZ) == 0)) {
1204 kfree(work);
1205 return nfserr_eagain;
1206 }
1207 finish_wait(&nn->nfsd_ssc_waitq, &wait);
1208 goto try_again;
1209 }
1210 *ss_mnt = ni->nsui_vfsmount;
1211 refcount_inc(&ni->nsui_refcnt);
1212 spin_unlock(&nn->nfsd_ssc_lock);
1213 kfree(work);
1214
1215 /* return vfsmount in ss_mnt */
1216 return 0;
1217 }
1218 if (work) {
1219 strncpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr));
1220 refcount_set(&work->nsui_refcnt, 2);
1221 work->nsui_busy = true;
1222 list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
1223 *retwork = work;
1224 }
1225 spin_unlock(&nn->nfsd_ssc_lock);
1226 return 0;
1227}
1228
1229static void nfsd4_ssc_update_dul_work(struct nfsd_net *nn,
1230 struct nfsd4_ssc_umount_item *work, struct vfsmount *ss_mnt)
1231{
1232 /* set nsui_vfsmount, clear busy flag and wakeup waiters */
1233 spin_lock(&nn->nfsd_ssc_lock);
1234 work->nsui_vfsmount = ss_mnt;
1235 work->nsui_busy = false;
1236 wake_up_all(&nn->nfsd_ssc_waitq);
1237 spin_unlock(&nn->nfsd_ssc_lock);
1238}
1239
1240static void nfsd4_ssc_cancel_dul_work(struct nfsd_net *nn,
1241 struct nfsd4_ssc_umount_item *work)
1242{
1243 spin_lock(&nn->nfsd_ssc_lock);
1244 list_del(&work->nsui_list);
1245 wake_up_all(&nn->nfsd_ssc_waitq);
1246 spin_unlock(&nn->nfsd_ssc_lock);
1247 kfree(work);
1248}
1249
1250/*
1251 * Support one copy source server for now.
1252 */
1253static __be32
1254nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1255 struct vfsmount **mount)
1256{
1257 struct file_system_type *type;
1258 struct vfsmount *ss_mnt;
1259 struct nfs42_netaddr *naddr;
1260 struct sockaddr_storage tmp_addr;
1261 size_t tmp_addrlen, match_netid_len = 3;
1262 char *startsep = "", *endsep = "", *match_netid = "tcp";
1263 char *ipaddr, *dev_name, *raw_data;
1264 int len, raw_len;
1265 __be32 status = nfserr_inval;
1266 struct nfsd4_ssc_umount_item *work = NULL;
1267 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1268
1269 naddr = &nss->u.nl4_addr;
1270 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1271 naddr->addr_len,
1272 (struct sockaddr *)&tmp_addr,
1273 sizeof(tmp_addr));
1274 if (tmp_addrlen == 0)
1275 goto out_err;
1276
1277 if (tmp_addr.ss_family == AF_INET6) {
1278 startsep = "[";
1279 endsep = "]";
1280 match_netid = "tcp6";
1281 match_netid_len = 4;
1282 }
1283
1284 if (naddr->netid_len != match_netid_len ||
1285 strncmp(naddr->netid, match_netid, naddr->netid_len))
1286 goto out_err;
1287
1288 /* Construct the raw data for the vfs_kern_mount call */
1289 len = RPC_MAX_ADDRBUFLEN + 1;
1290 ipaddr = kzalloc(len, GFP_KERNEL);
1291 if (!ipaddr)
1292 goto out_err;
1293
1294 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1295
1296 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1297
1298 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1299 raw_data = kzalloc(raw_len, GFP_KERNEL);
1300 if (!raw_data)
1301 goto out_free_ipaddr;
1302
1303 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1304
1305 status = nfserr_nodev;
1306 type = get_fs_type("nfs");
1307 if (!type)
1308 goto out_free_rawdata;
1309
1310 /* Set the server:<export> for the vfs_kern_mount call */
1311 dev_name = kzalloc(len + 5, GFP_KERNEL);
1312 if (!dev_name)
1313 goto out_free_rawdata;
1314 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1315
1316 status = nfsd4_ssc_setup_dul(nn, ipaddr, &work, &ss_mnt);
1317 if (status)
1318 goto out_free_devname;
1319 if (ss_mnt)
1320 goto out_done;
1321
1322 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1323 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1324 module_put(type->owner);
1325 if (IS_ERR(ss_mnt)) {
1326 status = nfserr_nodev;
1327 if (work)
1328 nfsd4_ssc_cancel_dul_work(nn, work);
1329 goto out_free_devname;
1330 }
1331 if (work)
1332 nfsd4_ssc_update_dul_work(nn, work, ss_mnt);
1333out_done:
1334 status = 0;
1335 *mount = ss_mnt;
1336
1337out_free_devname:
1338 kfree(dev_name);
1339out_free_rawdata:
1340 kfree(raw_data);
1341out_free_ipaddr:
1342 kfree(ipaddr);
1343out_err:
1344 return status;
1345}
1346
1347static void
1348nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1349{
1350 nfs_do_sb_deactive(ss_mnt->mnt_sb);
1351 mntput(ss_mnt);
1352}
1353
1354/*
1355 * Verify COPY destination stateid.
1356 *
1357 * Connect to the source server with NFSv4.1.
1358 * Create the source struct file for nfsd_copy_range.
1359 * Called with COPY cstate:
1360 * SAVED_FH: source filehandle
1361 * CURRENT_FH: destination filehandle
1362 */
1363static __be32
1364nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1365 struct nfsd4_compound_state *cstate,
1366 struct nfsd4_copy *copy, struct vfsmount **mount)
1367{
1368 struct svc_fh *s_fh = NULL;
1369 stateid_t *s_stid = ©->cp_src_stateid;
1370 __be32 status = nfserr_inval;
1371
1372 /* Verify the destination stateid and set dst struct file*/
1373 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1374 ©->cp_dst_stateid,
1375 WR_STATE, ©->nf_dst, NULL);
1376 if (status)
1377 goto out;
1378
1379 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
1380 if (status)
1381 goto out;
1382
1383 s_fh = &cstate->save_fh;
1384
1385 copy->c_fh.size = s_fh->fh_handle.fh_size;
1386 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
1387 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1388 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1389 sizeof(stateid_opaque_t));
1390
1391 status = 0;
1392out:
1393 return status;
1394}
1395
1396static void
1397nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1398 struct nfsd_file *dst)
1399{
1400 bool found = false;
1401 long timeout;
1402 struct nfsd4_ssc_umount_item *tmp;
1403 struct nfsd4_ssc_umount_item *ni = NULL;
1404 struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
1405
1406 nfs42_ssc_close(src->nf_file);
1407 nfsd_file_put(dst);
1408 fput(src->nf_file);
1409
1410 if (!nn) {
1411 mntput(ss_mnt);
1412 return;
1413 }
1414 spin_lock(&nn->nfsd_ssc_lock);
1415 timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
1416 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1417 if (ni->nsui_vfsmount->mnt_sb == ss_mnt->mnt_sb) {
1418 list_del(&ni->nsui_list);
1419 /*
1420 * vfsmount can be shared by multiple exports,
1421 * decrement refcnt. If the count drops to 1 it
1422 * will be unmounted when nsui_expire expires.
1423 */
1424 refcount_dec(&ni->nsui_refcnt);
1425 ni->nsui_expire = jiffies + timeout;
1426 list_add_tail(&ni->nsui_list, &nn->nfsd_ssc_mount_list);
1427 found = true;
1428 break;
1429 }
1430 }
1431 spin_unlock(&nn->nfsd_ssc_lock);
1432 if (!found) {
1433 mntput(ss_mnt);
1434 return;
1435 }
1436}
1437
1438#else /* CONFIG_NFSD_V4_2_INTER_SSC */
1439
1440static __be32
1441nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1442 struct nfsd4_compound_state *cstate,
1443 struct nfsd4_copy *copy,
1444 struct vfsmount **mount)
1445{
1446 *mount = NULL;
1447 return nfserr_inval;
1448}
1449
1450static void
1451nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1452 struct nfsd_file *dst)
1453{
1454}
1455
1456static void
1457nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1458{
1459}
1460
1461static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1462 struct nfs_fh *src_fh,
1463 nfs4_stateid *stateid)
1464{
1465 return NULL;
1466}
1467#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1468
1469static __be32
1470nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1471 struct nfsd4_compound_state *cstate,
1472 struct nfsd4_copy *copy)
1473{
1474 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1475 ©->nf_src, ©->cp_dst_stateid,
1476 ©->nf_dst);
1477}
1478
1479static void
1480nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1481{
1482 nfsd_file_put(src);
1483 nfsd_file_put(dst);
1484}
1485
1486static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1487{
1488 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1489
1490 nfs4_put_copy(copy);
1491}
1492
1493static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1494 struct rpc_task *task)
1495{
1496 return 1;
1497}
1498
1499static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1500 .release = nfsd4_cb_offload_release,
1501 .done = nfsd4_cb_offload_done
1502};
1503
1504static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1505{
1506 copy->cp_res.wr_stable_how =
1507 copy->committed ? NFS_FILE_SYNC : NFS_UNSTABLE;
1508 copy->cp_synchronous = sync;
1509 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1510}
1511
1512static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1513{
1514 ssize_t bytes_copied = 0;
1515 u64 bytes_total = copy->cp_count;
1516 u64 src_pos = copy->cp_src_pos;
1517 u64 dst_pos = copy->cp_dst_pos;
1518 __be32 status;
1519
1520 /* See RFC 7862 p.67: */
1521 if (bytes_total == 0)
1522 bytes_total = ULLONG_MAX;
1523 do {
1524 if (kthread_should_stop())
1525 break;
1526 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1527 src_pos, copy->nf_dst->nf_file, dst_pos,
1528 bytes_total);
1529 if (bytes_copied <= 0)
1530 break;
1531 bytes_total -= bytes_copied;
1532 copy->cp_res.wr_bytes_written += bytes_copied;
1533 src_pos += bytes_copied;
1534 dst_pos += bytes_copied;
1535 } while (bytes_total > 0 && !copy->cp_synchronous);
1536 /* for a non-zero asynchronous copy do a commit of data */
1537 if (!copy->cp_synchronous && copy->cp_res.wr_bytes_written > 0) {
1538 down_write(©->nf_dst->nf_rwsem);
1539 status = vfs_fsync_range(copy->nf_dst->nf_file,
1540 copy->cp_dst_pos,
1541 copy->cp_res.wr_bytes_written, 0);
1542 up_write(©->nf_dst->nf_rwsem);
1543 if (!status)
1544 copy->committed = true;
1545 }
1546 return bytes_copied;
1547}
1548
1549static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1550{
1551 __be32 status;
1552 ssize_t bytes;
1553
1554 bytes = _nfsd_copy_file_range(copy);
1555 /* for async copy, we ignore the error, client can always retry
1556 * to get the error
1557 */
1558 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1559 status = nfserrno(bytes);
1560 else {
1561 nfsd4_init_copy_res(copy, sync);
1562 status = nfs_ok;
1563 }
1564
1565 if (!copy->cp_intra) /* Inter server SSC */
1566 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1567 copy->nf_dst);
1568 else
1569 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1570
1571 return status;
1572}
1573
1574static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1575{
1576 dst->cp_src_pos = src->cp_src_pos;
1577 dst->cp_dst_pos = src->cp_dst_pos;
1578 dst->cp_count = src->cp_count;
1579 dst->cp_synchronous = src->cp_synchronous;
1580 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1581 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1582 dst->cp_clp = src->cp_clp;
1583 dst->nf_dst = nfsd_file_get(src->nf_dst);
1584 dst->cp_intra = src->cp_intra;
1585 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1586 dst->nf_src = nfsd_file_get(src->nf_src);
1587
1588 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1589 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1590 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1591 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1592 dst->ss_mnt = src->ss_mnt;
1593}
1594
1595static void cleanup_async_copy(struct nfsd4_copy *copy)
1596{
1597 nfs4_free_copy_state(copy);
1598 nfsd_file_put(copy->nf_dst);
1599 if (copy->cp_intra)
1600 nfsd_file_put(copy->nf_src);
1601 spin_lock(©->cp_clp->async_lock);
1602 list_del(©->copies);
1603 spin_unlock(©->cp_clp->async_lock);
1604 nfs4_put_copy(copy);
1605}
1606
1607static int nfsd4_do_async_copy(void *data)
1608{
1609 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1610 struct nfsd4_copy *cb_copy;
1611
1612 if (!copy->cp_intra) { /* Inter server SSC */
1613 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1614 if (!copy->nf_src) {
1615 copy->nfserr = nfserr_serverfault;
1616 nfsd4_interssc_disconnect(copy->ss_mnt);
1617 goto do_callback;
1618 }
1619 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1620 ©->stateid);
1621 if (IS_ERR(copy->nf_src->nf_file)) {
1622 copy->nfserr = nfserr_offload_denied;
1623 nfsd4_interssc_disconnect(copy->ss_mnt);
1624 goto do_callback;
1625 }
1626 }
1627
1628 copy->nfserr = nfsd4_do_copy(copy, 0);
1629do_callback:
1630 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1631 if (!cb_copy)
1632 goto out;
1633 refcount_set(&cb_copy->refcount, 1);
1634 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1635 cb_copy->cp_clp = copy->cp_clp;
1636 cb_copy->nfserr = copy->nfserr;
1637 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1638 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1639 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1640 trace_nfsd_cb_offload(copy->cp_clp, ©->cp_res.cb_stateid,
1641 ©->fh, copy->cp_count, copy->nfserr);
1642 nfsd4_run_cb(&cb_copy->cp_cb);
1643out:
1644 if (!copy->cp_intra)
1645 kfree(copy->nf_src);
1646 cleanup_async_copy(copy);
1647 return 0;
1648}
1649
1650static __be32
1651nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1652 union nfsd4_op_u *u)
1653{
1654 struct nfsd4_copy *copy = &u->copy;
1655 __be32 status;
1656 struct nfsd4_copy *async_copy = NULL;
1657
1658 if (!copy->cp_intra) { /* Inter server SSC */
1659 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1660 status = nfserr_notsupp;
1661 goto out;
1662 }
1663 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1664 ©->ss_mnt);
1665 if (status)
1666 return nfserr_offload_denied;
1667 } else {
1668 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1669 if (status)
1670 return status;
1671 }
1672
1673 copy->cp_clp = cstate->clp;
1674 memcpy(©->fh, &cstate->current_fh.fh_handle,
1675 sizeof(struct knfsd_fh));
1676 if (!copy->cp_synchronous) {
1677 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1678
1679 status = nfserrno(-ENOMEM);
1680 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1681 if (!async_copy)
1682 goto out_err;
1683 if (!nfs4_init_copy_state(nn, copy))
1684 goto out_err;
1685 refcount_set(&async_copy->refcount, 1);
1686 memcpy(©->cp_res.cb_stateid, ©->cp_stateid.stid,
1687 sizeof(copy->cp_res.cb_stateid));
1688 dup_copy_fields(copy, async_copy);
1689 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1690 async_copy, "%s", "copy thread");
1691 if (IS_ERR(async_copy->copy_task))
1692 goto out_err;
1693 spin_lock(&async_copy->cp_clp->async_lock);
1694 list_add(&async_copy->copies,
1695 &async_copy->cp_clp->async_copies);
1696 spin_unlock(&async_copy->cp_clp->async_lock);
1697 wake_up_process(async_copy->copy_task);
1698 status = nfs_ok;
1699 } else {
1700 status = nfsd4_do_copy(copy, 1);
1701 }
1702out:
1703 return status;
1704out_err:
1705 if (async_copy)
1706 cleanup_async_copy(async_copy);
1707 status = nfserrno(-ENOMEM);
1708 if (!copy->cp_intra)
1709 nfsd4_interssc_disconnect(copy->ss_mnt);
1710 goto out;
1711}
1712
1713struct nfsd4_copy *
1714find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1715{
1716 struct nfsd4_copy *copy;
1717
1718 spin_lock(&clp->async_lock);
1719 list_for_each_entry(copy, &clp->async_copies, copies) {
1720 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
1721 continue;
1722 refcount_inc(©->refcount);
1723 spin_unlock(&clp->async_lock);
1724 return copy;
1725 }
1726 spin_unlock(&clp->async_lock);
1727 return NULL;
1728}
1729
1730static __be32
1731nfsd4_offload_cancel(struct svc_rqst *rqstp,
1732 struct nfsd4_compound_state *cstate,
1733 union nfsd4_op_u *u)
1734{
1735 struct nfsd4_offload_status *os = &u->offload_status;
1736 struct nfsd4_copy *copy;
1737 struct nfs4_client *clp = cstate->clp;
1738
1739 copy = find_async_copy(clp, &os->stateid);
1740 if (!copy) {
1741 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1742
1743 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1744 } else
1745 nfsd4_stop_copy(copy);
1746
1747 return nfs_ok;
1748}
1749
1750static __be32
1751nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1752 union nfsd4_op_u *u)
1753{
1754 struct nfsd4_copy_notify *cn = &u->copy_notify;
1755 __be32 status;
1756 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1757 struct nfs4_stid *stid;
1758 struct nfs4_cpntf_state *cps;
1759 struct nfs4_client *clp = cstate->clp;
1760
1761 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1762 &cn->cpn_src_stateid, RD_STATE, NULL,
1763 &stid);
1764 if (status)
1765 return status;
1766
1767 cn->cpn_sec = nn->nfsd4_lease;
1768 cn->cpn_nsec = 0;
1769
1770 status = nfserrno(-ENOMEM);
1771 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1772 if (!cps)
1773 goto out;
1774 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1775 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1776 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1777
1778 /* For now, only return one server address in cpn_src, the
1779 * address used by the client to connect to this server.
1780 */
1781 cn->cpn_src.nl4_type = NL4_NETADDR;
1782 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1783 &cn->cpn_src.u.nl4_addr);
1784 WARN_ON_ONCE(status);
1785 if (status) {
1786 nfs4_put_cpntf_state(nn, cps);
1787 goto out;
1788 }
1789out:
1790 nfs4_put_stid(stid);
1791 return status;
1792}
1793
1794static __be32
1795nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1796 struct nfsd4_fallocate *fallocate, int flags)
1797{
1798 __be32 status;
1799 struct nfsd_file *nf;
1800
1801 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1802 &fallocate->falloc_stateid,
1803 WR_STATE, &nf, NULL);
1804 if (status != nfs_ok) {
1805 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1806 return status;
1807 }
1808
1809 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1810 fallocate->falloc_offset,
1811 fallocate->falloc_length,
1812 flags);
1813 nfsd_file_put(nf);
1814 return status;
1815}
1816static __be32
1817nfsd4_offload_status(struct svc_rqst *rqstp,
1818 struct nfsd4_compound_state *cstate,
1819 union nfsd4_op_u *u)
1820{
1821 struct nfsd4_offload_status *os = &u->offload_status;
1822 __be32 status = 0;
1823 struct nfsd4_copy *copy;
1824 struct nfs4_client *clp = cstate->clp;
1825
1826 copy = find_async_copy(clp, &os->stateid);
1827 if (copy) {
1828 os->count = copy->cp_res.wr_bytes_written;
1829 nfs4_put_copy(copy);
1830 } else
1831 status = nfserr_bad_stateid;
1832
1833 return status;
1834}
1835
1836static __be32
1837nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1838 union nfsd4_op_u *u)
1839{
1840 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1841}
1842
1843static __be32
1844nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1845 union nfsd4_op_u *u)
1846{
1847 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1848 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1849}
1850
1851static __be32
1852nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1853 union nfsd4_op_u *u)
1854{
1855 struct nfsd4_seek *seek = &u->seek;
1856 int whence;
1857 __be32 status;
1858 struct nfsd_file *nf;
1859
1860 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1861 &seek->seek_stateid,
1862 RD_STATE, &nf, NULL);
1863 if (status) {
1864 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1865 return status;
1866 }
1867
1868 switch (seek->seek_whence) {
1869 case NFS4_CONTENT_DATA:
1870 whence = SEEK_DATA;
1871 break;
1872 case NFS4_CONTENT_HOLE:
1873 whence = SEEK_HOLE;
1874 break;
1875 default:
1876 status = nfserr_union_notsupp;
1877 goto out;
1878 }
1879
1880 /*
1881 * Note: This call does change file->f_pos, but nothing in NFSD
1882 * should ever file->f_pos.
1883 */
1884 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1885 if (seek->seek_pos < 0)
1886 status = nfserrno(seek->seek_pos);
1887 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1888 seek->seek_eof = true;
1889
1890out:
1891 nfsd_file_put(nf);
1892 return status;
1893}
1894
1895/* This routine never returns NFS_OK! If there are no other errors, it
1896 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1897 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1898 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1899 */
1900static __be32
1901_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1902 struct nfsd4_verify *verify)
1903{
1904 __be32 *buf, *p;
1905 int count;
1906 __be32 status;
1907
1908 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1909 if (status)
1910 return status;
1911
1912 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1913 if (status)
1914 return status;
1915
1916 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1917 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1918 return nfserr_inval;
1919 if (verify->ve_attrlen & 3)
1920 return nfserr_inval;
1921
1922 /* count in words:
1923 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1924 */
1925 count = 4 + (verify->ve_attrlen >> 2);
1926 buf = kmalloc(count << 2, GFP_KERNEL);
1927 if (!buf)
1928 return nfserr_jukebox;
1929
1930 p = buf;
1931 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1932 cstate->current_fh.fh_export,
1933 cstate->current_fh.fh_dentry,
1934 verify->ve_bmval,
1935 rqstp, 0);
1936 /*
1937 * If nfsd4_encode_fattr() ran out of space, assume that's because
1938 * the attributes are longer (hence different) than those given:
1939 */
1940 if (status == nfserr_resource)
1941 status = nfserr_not_same;
1942 if (status)
1943 goto out_kfree;
1944
1945 /* skip bitmap */
1946 p = buf + 1 + ntohl(buf[0]);
1947 status = nfserr_not_same;
1948 if (ntohl(*p++) != verify->ve_attrlen)
1949 goto out_kfree;
1950 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1951 status = nfserr_same;
1952
1953out_kfree:
1954 kfree(buf);
1955 return status;
1956}
1957
1958static __be32
1959nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1960 union nfsd4_op_u *u)
1961{
1962 __be32 status;
1963
1964 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1965 return status == nfserr_not_same ? nfs_ok : status;
1966}
1967
1968static __be32
1969nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1970 union nfsd4_op_u *u)
1971{
1972 __be32 status;
1973
1974 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1975 return status == nfserr_same ? nfs_ok : status;
1976}
1977
1978#ifdef CONFIG_NFSD_PNFS
1979static const struct nfsd4_layout_ops *
1980nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1981{
1982 if (!exp->ex_layout_types) {
1983 dprintk("%s: export does not support pNFS\n", __func__);
1984 return NULL;
1985 }
1986
1987 if (layout_type >= LAYOUT_TYPE_MAX ||
1988 !(exp->ex_layout_types & (1 << layout_type))) {
1989 dprintk("%s: layout type %d not supported\n",
1990 __func__, layout_type);
1991 return NULL;
1992 }
1993
1994 return nfsd4_layout_ops[layout_type];
1995}
1996
1997static __be32
1998nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1999 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2000{
2001 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
2002 const struct nfsd4_layout_ops *ops;
2003 struct nfsd4_deviceid_map *map;
2004 struct svc_export *exp;
2005 __be32 nfserr;
2006
2007 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
2008 __func__,
2009 gdp->gd_layout_type,
2010 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
2011 gdp->gd_maxcount);
2012
2013 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
2014 if (!map) {
2015 dprintk("%s: couldn't find device ID to export mapping!\n",
2016 __func__);
2017 return nfserr_noent;
2018 }
2019
2020 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
2021 if (IS_ERR(exp)) {
2022 dprintk("%s: could not find device id\n", __func__);
2023 return nfserr_noent;
2024 }
2025
2026 nfserr = nfserr_layoutunavailable;
2027 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
2028 if (!ops)
2029 goto out;
2030
2031 nfserr = nfs_ok;
2032 if (gdp->gd_maxcount != 0) {
2033 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
2034 rqstp, cstate->clp, gdp);
2035 }
2036
2037 gdp->gd_notify_types &= ops->notify_types;
2038out:
2039 exp_put(exp);
2040 return nfserr;
2041}
2042
2043static void
2044nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
2045{
2046 kfree(u->getdeviceinfo.gd_device);
2047}
2048
2049static __be32
2050nfsd4_layoutget(struct svc_rqst *rqstp,
2051 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2052{
2053 struct nfsd4_layoutget *lgp = &u->layoutget;
2054 struct svc_fh *current_fh = &cstate->current_fh;
2055 const struct nfsd4_layout_ops *ops;
2056 struct nfs4_layout_stateid *ls;
2057 __be32 nfserr;
2058 int accmode = NFSD_MAY_READ_IF_EXEC;
2059
2060 switch (lgp->lg_seg.iomode) {
2061 case IOMODE_READ:
2062 accmode |= NFSD_MAY_READ;
2063 break;
2064 case IOMODE_RW:
2065 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
2066 break;
2067 default:
2068 dprintk("%s: invalid iomode %d\n",
2069 __func__, lgp->lg_seg.iomode);
2070 nfserr = nfserr_badiomode;
2071 goto out;
2072 }
2073
2074 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
2075 if (nfserr)
2076 goto out;
2077
2078 nfserr = nfserr_layoutunavailable;
2079 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
2080 if (!ops)
2081 goto out;
2082
2083 /*
2084 * Verify minlength and range as per RFC5661:
2085 * o If loga_length is less than loga_minlength,
2086 * the metadata server MUST return NFS4ERR_INVAL.
2087 * o If the sum of loga_offset and loga_minlength exceeds
2088 * NFS4_UINT64_MAX, and loga_minlength is not
2089 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
2090 * o If the sum of loga_offset and loga_length exceeds
2091 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
2092 * the error NFS4ERR_INVAL MUST result.
2093 */
2094 nfserr = nfserr_inval;
2095 if (lgp->lg_seg.length < lgp->lg_minlength ||
2096 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
2097 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
2098 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
2099 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
2100 goto out;
2101 if (lgp->lg_seg.length == 0)
2102 goto out;
2103
2104 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
2105 true, lgp->lg_layout_type, &ls);
2106 if (nfserr) {
2107 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
2108 goto out;
2109 }
2110
2111 nfserr = nfserr_recallconflict;
2112 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
2113 goto out_put_stid;
2114
2115 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
2116 current_fh, lgp);
2117 if (nfserr)
2118 goto out_put_stid;
2119
2120 nfserr = nfsd4_insert_layout(lgp, ls);
2121
2122out_put_stid:
2123 mutex_unlock(&ls->ls_mutex);
2124 nfs4_put_stid(&ls->ls_stid);
2125out:
2126 return nfserr;
2127}
2128
2129static void
2130nfsd4_layoutget_release(union nfsd4_op_u *u)
2131{
2132 kfree(u->layoutget.lg_content);
2133}
2134
2135static __be32
2136nfsd4_layoutcommit(struct svc_rqst *rqstp,
2137 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2138{
2139 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
2140 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
2141 struct svc_fh *current_fh = &cstate->current_fh;
2142 const struct nfsd4_layout_ops *ops;
2143 loff_t new_size = lcp->lc_last_wr + 1;
2144 struct inode *inode;
2145 struct nfs4_layout_stateid *ls;
2146 __be32 nfserr;
2147
2148 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2149 if (nfserr)
2150 goto out;
2151
2152 nfserr = nfserr_layoutunavailable;
2153 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2154 if (!ops)
2155 goto out;
2156 inode = d_inode(current_fh->fh_dentry);
2157
2158 nfserr = nfserr_inval;
2159 if (new_size <= seg->offset) {
2160 dprintk("pnfsd: last write before layout segment\n");
2161 goto out;
2162 }
2163 if (new_size > seg->offset + seg->length) {
2164 dprintk("pnfsd: last write beyond layout segment\n");
2165 goto out;
2166 }
2167 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2168 dprintk("pnfsd: layoutcommit beyond EOF\n");
2169 goto out;
2170 }
2171
2172 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2173 false, lcp->lc_layout_type,
2174 &ls);
2175 if (nfserr) {
2176 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2177 /* fixup error code as per RFC5661 */
2178 if (nfserr == nfserr_bad_stateid)
2179 nfserr = nfserr_badlayout;
2180 goto out;
2181 }
2182
2183 /* LAYOUTCOMMIT does not require any serialization */
2184 mutex_unlock(&ls->ls_mutex);
2185
2186 if (new_size > i_size_read(inode)) {
2187 lcp->lc_size_chg = 1;
2188 lcp->lc_newsize = new_size;
2189 } else {
2190 lcp->lc_size_chg = 0;
2191 }
2192
2193 nfserr = ops->proc_layoutcommit(inode, lcp);
2194 nfs4_put_stid(&ls->ls_stid);
2195out:
2196 return nfserr;
2197}
2198
2199static __be32
2200nfsd4_layoutreturn(struct svc_rqst *rqstp,
2201 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2202{
2203 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2204 struct svc_fh *current_fh = &cstate->current_fh;
2205 __be32 nfserr;
2206
2207 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2208 if (nfserr)
2209 goto out;
2210
2211 nfserr = nfserr_layoutunavailable;
2212 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2213 goto out;
2214
2215 switch (lrp->lr_seg.iomode) {
2216 case IOMODE_READ:
2217 case IOMODE_RW:
2218 case IOMODE_ANY:
2219 break;
2220 default:
2221 dprintk("%s: invalid iomode %d\n", __func__,
2222 lrp->lr_seg.iomode);
2223 nfserr = nfserr_inval;
2224 goto out;
2225 }
2226
2227 switch (lrp->lr_return_type) {
2228 case RETURN_FILE:
2229 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2230 break;
2231 case RETURN_FSID:
2232 case RETURN_ALL:
2233 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2234 break;
2235 default:
2236 dprintk("%s: invalid return_type %d\n", __func__,
2237 lrp->lr_return_type);
2238 nfserr = nfserr_inval;
2239 break;
2240 }
2241out:
2242 return nfserr;
2243}
2244#endif /* CONFIG_NFSD_PNFS */
2245
2246static __be32
2247nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2248 union nfsd4_op_u *u)
2249{
2250 struct nfsd4_getxattr *getxattr = &u->getxattr;
2251
2252 return nfsd_getxattr(rqstp, &cstate->current_fh,
2253 getxattr->getxa_name, &getxattr->getxa_buf,
2254 &getxattr->getxa_len);
2255}
2256
2257static __be32
2258nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2259 union nfsd4_op_u *u)
2260{
2261 struct nfsd4_setxattr *setxattr = &u->setxattr;
2262 __be32 ret;
2263
2264 if (opens_in_grace(SVC_NET(rqstp)))
2265 return nfserr_grace;
2266
2267 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2268 setxattr->setxa_buf, setxattr->setxa_len,
2269 setxattr->setxa_flags);
2270
2271 if (!ret)
2272 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2273
2274 return ret;
2275}
2276
2277static __be32
2278nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2279 union nfsd4_op_u *u)
2280{
2281 /*
2282 * Get the entire list, then copy out only the user attributes
2283 * in the encode function.
2284 */
2285 return nfsd_listxattr(rqstp, &cstate->current_fh,
2286 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2287}
2288
2289static __be32
2290nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2291 union nfsd4_op_u *u)
2292{
2293 struct nfsd4_removexattr *removexattr = &u->removexattr;
2294 __be32 ret;
2295
2296 if (opens_in_grace(SVC_NET(rqstp)))
2297 return nfserr_grace;
2298
2299 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2300 removexattr->rmxa_name);
2301
2302 if (!ret)
2303 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2304
2305 return ret;
2306}
2307
2308/*
2309 * NULL call.
2310 */
2311static __be32
2312nfsd4_proc_null(struct svc_rqst *rqstp)
2313{
2314 return rpc_success;
2315}
2316
2317static inline void nfsd4_increment_op_stats(u32 opnum)
2318{
2319 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2320 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
2321}
2322
2323static const struct nfsd4_operation nfsd4_ops[];
2324
2325static const char *nfsd4_op_name(unsigned opnum);
2326
2327/*
2328 * Enforce NFSv4.1 COMPOUND ordering rules:
2329 *
2330 * Also note, enforced elsewhere:
2331 * - SEQUENCE other than as first op results in
2332 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2333 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2334 * (Enforced in nfsd4_bind_conn_to_session().)
2335 * - DESTROY_SESSION must be the final operation in a compound, if
2336 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2337 * (Enforced in nfsd4_destroy_session().)
2338 */
2339static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2340{
2341 struct nfsd4_op *first_op = &args->ops[0];
2342
2343 /* These ordering requirements don't apply to NFSv4.0: */
2344 if (args->minorversion == 0)
2345 return nfs_ok;
2346 /* This is weird, but OK, not our problem: */
2347 if (args->opcnt == 0)
2348 return nfs_ok;
2349 if (first_op->status == nfserr_op_illegal)
2350 return nfs_ok;
2351 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2352 return nfserr_op_not_in_session;
2353 if (first_op->opnum == OP_SEQUENCE)
2354 return nfs_ok;
2355 /*
2356 * So first_op is something allowed outside a session, like
2357 * EXCHANGE_ID; but then it has to be the only op in the
2358 * compound:
2359 */
2360 if (args->opcnt != 1)
2361 return nfserr_not_only_op;
2362 return nfs_ok;
2363}
2364
2365const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2366{
2367 return &nfsd4_ops[op->opnum];
2368}
2369
2370bool nfsd4_cache_this_op(struct nfsd4_op *op)
2371{
2372 if (op->opnum == OP_ILLEGAL)
2373 return false;
2374 return OPDESC(op)->op_flags & OP_CACHEME;
2375}
2376
2377static bool need_wrongsec_check(struct svc_rqst *rqstp)
2378{
2379 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2380 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2381 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2382 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2383 const struct nfsd4_operation *thisd = OPDESC(this);
2384 const struct nfsd4_operation *nextd;
2385
2386 /*
2387 * Most ops check wronsec on our own; only the putfh-like ops
2388 * have special rules.
2389 */
2390 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2391 return false;
2392 /*
2393 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2394 * put-filehandle operation if we're not going to use the
2395 * result:
2396 */
2397 if (argp->opcnt == resp->opcnt)
2398 return false;
2399 if (next->opnum == OP_ILLEGAL)
2400 return false;
2401 nextd = OPDESC(next);
2402 /*
2403 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2404 * errors themselves as necessary; others should check for them
2405 * now:
2406 */
2407 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2408}
2409
2410#ifdef CONFIG_NFSD_V4_2_INTER_SSC
2411static void
2412check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2413{
2414 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2415 struct nfsd4_copy *copy;
2416 struct nfsd4_putfh *putfh;
2417 int i;
2418
2419 /* traverse all operation and if it's a COPY compound, mark the
2420 * source filehandle to skip verification
2421 */
2422 for (i = 0; i < args->opcnt; i++) {
2423 op = &args->ops[i];
2424 if (op->opnum == OP_PUTFH)
2425 current_op = op;
2426 else if (op->opnum == OP_SAVEFH)
2427 saved_op = current_op;
2428 else if (op->opnum == OP_RESTOREFH)
2429 current_op = saved_op;
2430 else if (op->opnum == OP_COPY) {
2431 copy = (struct nfsd4_copy *)&op->u;
2432 if (!saved_op) {
2433 op->status = nfserr_nofilehandle;
2434 return;
2435 }
2436 putfh = (struct nfsd4_putfh *)&saved_op->u;
2437 if (!copy->cp_intra)
2438 putfh->no_verify = true;
2439 }
2440 }
2441}
2442#else
2443static void
2444check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2445{
2446}
2447#endif
2448
2449/*
2450 * COMPOUND call.
2451 */
2452static __be32
2453nfsd4_proc_compound(struct svc_rqst *rqstp)
2454{
2455 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2456 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2457 struct nfsd4_op *op;
2458 struct nfsd4_compound_state *cstate = &resp->cstate;
2459 struct svc_fh *current_fh = &cstate->current_fh;
2460 struct svc_fh *save_fh = &cstate->save_fh;
2461 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2462 __be32 status;
2463
2464 resp->xdr = &rqstp->rq_res_stream;
2465
2466 /* reserve space for: NFS status code */
2467 xdr_reserve_space(resp->xdr, XDR_UNIT);
2468
2469 resp->tagp = resp->xdr->p;
2470 /* reserve space for: taglen, tag, and opcnt */
2471 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
2472 resp->taglen = args->taglen;
2473 resp->tag = args->tag;
2474 resp->rqstp = rqstp;
2475 cstate->minorversion = args->minorversion;
2476 fh_init(current_fh, NFS4_FHSIZE);
2477 fh_init(save_fh, NFS4_FHSIZE);
2478 /*
2479 * Don't use the deferral mechanism for NFSv4; compounds make it
2480 * too hard to avoid non-idempotency problems.
2481 */
2482 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2483
2484 /*
2485 * According to RFC3010, this takes precedence over all other errors.
2486 */
2487 status = nfserr_minor_vers_mismatch;
2488 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2489 goto out;
2490 status = nfserr_resource;
2491 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2492 goto out;
2493
2494 status = nfs41_check_op_ordering(args);
2495 if (status) {
2496 op = &args->ops[0];
2497 op->status = status;
2498 resp->opcnt = 1;
2499 goto encode_op;
2500 }
2501 check_if_stalefh_allowed(args);
2502
2503 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2504
2505 trace_nfsd_compound(rqstp, args->opcnt);
2506 while (!status && resp->opcnt < args->opcnt) {
2507 op = &args->ops[resp->opcnt++];
2508
2509 /*
2510 * The XDR decode routines may have pre-set op->status;
2511 * for example, if there is a miscellaneous XDR error
2512 * it will be set to nfserr_bad_xdr.
2513 */
2514 if (op->status) {
2515 if (op->opnum == OP_OPEN)
2516 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2517 goto encode_op;
2518 }
2519 if (!current_fh->fh_dentry &&
2520 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2521 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2522 op->status = nfserr_nofilehandle;
2523 goto encode_op;
2524 }
2525 } else if (current_fh->fh_export &&
2526 current_fh->fh_export->ex_fslocs.migrated &&
2527 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2528 op->status = nfserr_moved;
2529 goto encode_op;
2530 }
2531
2532 fh_clear_wcc(current_fh);
2533
2534 /* If op is non-idempotent */
2535 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2536 /*
2537 * Don't execute this op if we couldn't encode a
2538 * succesful reply:
2539 */
2540 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2541 /*
2542 * Plus if there's another operation, make sure
2543 * we'll have space to at least encode an error:
2544 */
2545 if (resp->opcnt < args->opcnt)
2546 plen += COMPOUND_ERR_SLACK_SPACE;
2547 op->status = nfsd4_check_resp_size(resp, plen);
2548 }
2549
2550 if (op->status)
2551 goto encode_op;
2552
2553 if (op->opdesc->op_get_currentstateid)
2554 op->opdesc->op_get_currentstateid(cstate, &op->u);
2555 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2556
2557 /* Only from SEQUENCE */
2558 if (cstate->status == nfserr_replay_cache) {
2559 dprintk("%s NFS4.1 replay from cache\n", __func__);
2560 status = op->status;
2561 goto out;
2562 }
2563 if (!op->status) {
2564 if (op->opdesc->op_set_currentstateid)
2565 op->opdesc->op_set_currentstateid(cstate, &op->u);
2566
2567 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2568 clear_current_stateid(cstate);
2569
2570 if (current_fh->fh_export &&
2571 need_wrongsec_check(rqstp))
2572 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2573 }
2574encode_op:
2575 if (op->status == nfserr_replay_me) {
2576 op->replay = &cstate->replay_owner->so_replay;
2577 nfsd4_encode_replay(resp->xdr, op);
2578 status = op->status = op->replay->rp_status;
2579 } else {
2580 nfsd4_encode_operation(resp, op);
2581 status = op->status;
2582 }
2583
2584 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2585 nfsd4_op_name(op->opnum));
2586
2587 nfsd4_cstate_clear_replay(cstate);
2588 nfsd4_increment_op_stats(op->opnum);
2589 }
2590
2591 fh_put(current_fh);
2592 fh_put(save_fh);
2593 BUG_ON(cstate->replay_owner);
2594out:
2595 cstate->status = status;
2596 /* Reset deferral mechanism for RPC deferrals */
2597 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2598 return rpc_success;
2599}
2600
2601#define op_encode_hdr_size (2)
2602#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2603#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2604#define op_encode_change_info_maxsz (5)
2605#define nfs4_fattr_bitmap_maxsz (4)
2606
2607/* We'll fall back on returning no lockowner if run out of space: */
2608#define op_encode_lockowner_maxsz (0)
2609#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2610
2611#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2612
2613#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2614#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2615 op_encode_ace_maxsz)
2616
2617#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2618
2619static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2620{
2621 return (op_encode_hdr_size) * sizeof(__be32);
2622}
2623
2624static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2625{
2626 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2627}
2628
2629static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2630{
2631 /* ac_supported, ac_resp_access */
2632 return (op_encode_hdr_size + 2)* sizeof(__be32);
2633}
2634
2635static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2636{
2637 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2638}
2639
2640static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2641{
2642 return (op_encode_hdr_size + op_encode_change_info_maxsz
2643 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2644}
2645
2646/*
2647 * Note since this is an idempotent operation we won't insist on failing
2648 * the op prematurely if the estimate is too large. We may turn off splice
2649 * reads unnecessarily.
2650 */
2651static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2652 struct nfsd4_op *op)
2653{
2654 u32 *bmap = op->u.getattr.ga_bmval;
2655 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2656 u32 ret = 0;
2657
2658 if (bmap0 & FATTR4_WORD0_ACL)
2659 return svc_max_payload(rqstp);
2660 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2661 return svc_max_payload(rqstp);
2662
2663 if (bmap1 & FATTR4_WORD1_OWNER) {
2664 ret += IDMAP_NAMESZ + 4;
2665 bmap1 &= ~FATTR4_WORD1_OWNER;
2666 }
2667 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2668 ret += IDMAP_NAMESZ + 4;
2669 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2670 }
2671 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2672 ret += NFS4_FHSIZE + 4;
2673 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2674 }
2675 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2676 ret += NFS4_MAXLABELLEN + 12;
2677 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2678 }
2679 /*
2680 * Largest of remaining attributes are 16 bytes (e.g.,
2681 * supported_attributes)
2682 */
2683 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2684 /* bitmask, length */
2685 ret += 20;
2686 return ret;
2687}
2688
2689static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2690{
2691 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2692}
2693
2694static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2695{
2696 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2697 * sizeof(__be32);
2698}
2699
2700static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2701{
2702 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2703 * sizeof(__be32);
2704}
2705
2706static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2707{
2708 return (op_encode_hdr_size + op_encode_stateid_maxsz
2709 + op_encode_change_info_maxsz + 1
2710 + nfs4_fattr_bitmap_maxsz
2711 + op_encode_delegation_maxsz) * sizeof(__be32);
2712}
2713
2714static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2715{
2716 u32 maxcount = 0, rlen = 0;
2717
2718 maxcount = svc_max_payload(rqstp);
2719 rlen = min(op->u.read.rd_length, maxcount);
2720
2721 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2722}
2723
2724static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2725{
2726 u32 maxcount = svc_max_payload(rqstp);
2727 u32 rlen = min(op->u.read.rd_length, maxcount);
2728 /*
2729 * If we detect that the file changed during hole encoding, then we
2730 * recover by encoding the remaining reply as data. This means we need
2731 * to set aside enough room to encode two data segments.
2732 */
2733 u32 seg_len = 2 * (1 + 2 + 1);
2734
2735 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2736}
2737
2738static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2739{
2740 u32 maxcount = 0, rlen = 0;
2741
2742 maxcount = svc_max_payload(rqstp);
2743 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2744
2745 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2746 XDR_QUADLEN(rlen)) * sizeof(__be32);
2747}
2748
2749static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2750{
2751 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2752}
2753
2754static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2755{
2756 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2757 * sizeof(__be32);
2758}
2759
2760static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2761{
2762 return (op_encode_hdr_size + op_encode_change_info_maxsz
2763 + op_encode_change_info_maxsz) * sizeof(__be32);
2764}
2765
2766static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2767 struct nfsd4_op *op)
2768{
2769 return (op_encode_hdr_size
2770 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2771}
2772
2773static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2774{
2775 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2776 * sizeof(__be32);
2777}
2778
2779static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2780{
2781 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2782}
2783
2784static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2785{
2786 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2787 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2788}
2789
2790static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2791{
2792 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2793 sizeof(__be32);
2794}
2795
2796static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2797{
2798 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2799}
2800
2801static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2802{
2803 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2804 1 + 1 + /* eir_flags, spr_how */\
2805 4 + /* spo_must_enforce & _allow with bitmap */\
2806 2 + /*eir_server_owner.so_minor_id */\
2807 /* eir_server_owner.so_major_id<> */\
2808 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2809 /* eir_server_scope<> */\
2810 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2811 1 + /* eir_server_impl_id array length */\
2812 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2813}
2814
2815static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2816{
2817 return (op_encode_hdr_size + \
2818 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2819 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2820}
2821
2822static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2823{
2824 return (op_encode_hdr_size + \
2825 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2826 2 + /* csr_sequence, csr_flags */\
2827 op_encode_channel_attrs_maxsz + \
2828 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2829}
2830
2831static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2832{
2833 return (op_encode_hdr_size +
2834 1 /* wr_callback */ +
2835 op_encode_stateid_maxsz /* wr_callback */ +
2836 2 /* wr_count */ +
2837 1 /* wr_committed */ +
2838 op_encode_verifier_maxsz +
2839 1 /* cr_consecutive */ +
2840 1 /* cr_synchronous */) * sizeof(__be32);
2841}
2842
2843static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2844 struct nfsd4_op *op)
2845{
2846 return (op_encode_hdr_size +
2847 2 /* osr_count */ +
2848 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2849}
2850
2851static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2852 struct nfsd4_op *op)
2853{
2854 return (op_encode_hdr_size +
2855 3 /* cnr_lease_time */ +
2856 1 /* We support one cnr_source_server */ +
2857 1 /* cnr_stateid seq */ +
2858 op_encode_stateid_maxsz /* cnr_stateid */ +
2859 1 /* num cnr_source_server*/ +
2860 1 /* nl4_type */ +
2861 1 /* nl4 size */ +
2862 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2863 * sizeof(__be32);
2864}
2865
2866#ifdef CONFIG_NFSD_PNFS
2867static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2868{
2869 u32 maxcount = 0, rlen = 0;
2870
2871 maxcount = svc_max_payload(rqstp);
2872 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2873
2874 return (op_encode_hdr_size +
2875 1 /* gd_layout_type*/ +
2876 XDR_QUADLEN(rlen) +
2877 2 /* gd_notify_types */) * sizeof(__be32);
2878}
2879
2880/*
2881 * At this stage we don't really know what layout driver will handle the request,
2882 * so we need to define an arbitrary upper bound here.
2883 */
2884#define MAX_LAYOUT_SIZE 128
2885static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2886{
2887 return (op_encode_hdr_size +
2888 1 /* logr_return_on_close */ +
2889 op_encode_stateid_maxsz +
2890 1 /* nr of layouts */ +
2891 MAX_LAYOUT_SIZE) * sizeof(__be32);
2892}
2893
2894static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2895{
2896 return (op_encode_hdr_size +
2897 1 /* locr_newsize */ +
2898 2 /* ns_size */) * sizeof(__be32);
2899}
2900
2901static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2902{
2903 return (op_encode_hdr_size +
2904 1 /* lrs_stateid */ +
2905 op_encode_stateid_maxsz) * sizeof(__be32);
2906}
2907#endif /* CONFIG_NFSD_PNFS */
2908
2909
2910static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2911{
2912 return (op_encode_hdr_size + 3) * sizeof(__be32);
2913}
2914
2915static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2916 struct nfsd4_op *op)
2917{
2918 u32 maxcount, rlen;
2919
2920 maxcount = svc_max_payload(rqstp);
2921 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2922
2923 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2924}
2925
2926static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2927 struct nfsd4_op *op)
2928{
2929 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2930 * sizeof(__be32);
2931}
2932static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2933 struct nfsd4_op *op)
2934{
2935 u32 maxcount, rlen;
2936
2937 maxcount = svc_max_payload(rqstp);
2938 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2939
2940 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2941}
2942
2943static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2944 struct nfsd4_op *op)
2945{
2946 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2947 * sizeof(__be32);
2948}
2949
2950
2951static const struct nfsd4_operation nfsd4_ops[] = {
2952 [OP_ACCESS] = {
2953 .op_func = nfsd4_access,
2954 .op_name = "OP_ACCESS",
2955 .op_rsize_bop = nfsd4_access_rsize,
2956 },
2957 [OP_CLOSE] = {
2958 .op_func = nfsd4_close,
2959 .op_flags = OP_MODIFIES_SOMETHING,
2960 .op_name = "OP_CLOSE",
2961 .op_rsize_bop = nfsd4_status_stateid_rsize,
2962 .op_get_currentstateid = nfsd4_get_closestateid,
2963 .op_set_currentstateid = nfsd4_set_closestateid,
2964 },
2965 [OP_COMMIT] = {
2966 .op_func = nfsd4_commit,
2967 .op_flags = OP_MODIFIES_SOMETHING,
2968 .op_name = "OP_COMMIT",
2969 .op_rsize_bop = nfsd4_commit_rsize,
2970 },
2971 [OP_CREATE] = {
2972 .op_func = nfsd4_create,
2973 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2974 .op_name = "OP_CREATE",
2975 .op_rsize_bop = nfsd4_create_rsize,
2976 },
2977 [OP_DELEGRETURN] = {
2978 .op_func = nfsd4_delegreturn,
2979 .op_flags = OP_MODIFIES_SOMETHING,
2980 .op_name = "OP_DELEGRETURN",
2981 .op_rsize_bop = nfsd4_only_status_rsize,
2982 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2983 },
2984 [OP_GETATTR] = {
2985 .op_func = nfsd4_getattr,
2986 .op_flags = ALLOWED_ON_ABSENT_FS,
2987 .op_rsize_bop = nfsd4_getattr_rsize,
2988 .op_name = "OP_GETATTR",
2989 },
2990 [OP_GETFH] = {
2991 .op_func = nfsd4_getfh,
2992 .op_name = "OP_GETFH",
2993 .op_rsize_bop = nfsd4_getfh_rsize,
2994 },
2995 [OP_LINK] = {
2996 .op_func = nfsd4_link,
2997 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2998 | OP_CACHEME,
2999 .op_name = "OP_LINK",
3000 .op_rsize_bop = nfsd4_link_rsize,
3001 },
3002 [OP_LOCK] = {
3003 .op_func = nfsd4_lock,
3004 .op_flags = OP_MODIFIES_SOMETHING |
3005 OP_NONTRIVIAL_ERROR_ENCODE,
3006 .op_name = "OP_LOCK",
3007 .op_rsize_bop = nfsd4_lock_rsize,
3008 .op_set_currentstateid = nfsd4_set_lockstateid,
3009 },
3010 [OP_LOCKT] = {
3011 .op_func = nfsd4_lockt,
3012 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
3013 .op_name = "OP_LOCKT",
3014 .op_rsize_bop = nfsd4_lock_rsize,
3015 },
3016 [OP_LOCKU] = {
3017 .op_func = nfsd4_locku,
3018 .op_flags = OP_MODIFIES_SOMETHING,
3019 .op_name = "OP_LOCKU",
3020 .op_rsize_bop = nfsd4_status_stateid_rsize,
3021 .op_get_currentstateid = nfsd4_get_lockustateid,
3022 },
3023 [OP_LOOKUP] = {
3024 .op_func = nfsd4_lookup,
3025 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3026 .op_name = "OP_LOOKUP",
3027 .op_rsize_bop = nfsd4_only_status_rsize,
3028 },
3029 [OP_LOOKUPP] = {
3030 .op_func = nfsd4_lookupp,
3031 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3032 .op_name = "OP_LOOKUPP",
3033 .op_rsize_bop = nfsd4_only_status_rsize,
3034 },
3035 [OP_NVERIFY] = {
3036 .op_func = nfsd4_nverify,
3037 .op_name = "OP_NVERIFY",
3038 .op_rsize_bop = nfsd4_only_status_rsize,
3039 },
3040 [OP_OPEN] = {
3041 .op_func = nfsd4_open,
3042 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3043 .op_name = "OP_OPEN",
3044 .op_rsize_bop = nfsd4_open_rsize,
3045 .op_set_currentstateid = nfsd4_set_openstateid,
3046 },
3047 [OP_OPEN_CONFIRM] = {
3048 .op_func = nfsd4_open_confirm,
3049 .op_flags = OP_MODIFIES_SOMETHING,
3050 .op_name = "OP_OPEN_CONFIRM",
3051 .op_rsize_bop = nfsd4_status_stateid_rsize,
3052 },
3053 [OP_OPEN_DOWNGRADE] = {
3054 .op_func = nfsd4_open_downgrade,
3055 .op_flags = OP_MODIFIES_SOMETHING,
3056 .op_name = "OP_OPEN_DOWNGRADE",
3057 .op_rsize_bop = nfsd4_status_stateid_rsize,
3058 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
3059 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
3060 },
3061 [OP_PUTFH] = {
3062 .op_func = nfsd4_putfh,
3063 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3064 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3065 .op_name = "OP_PUTFH",
3066 .op_rsize_bop = nfsd4_only_status_rsize,
3067 },
3068 [OP_PUTPUBFH] = {
3069 .op_func = nfsd4_putrootfh,
3070 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3071 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3072 .op_name = "OP_PUTPUBFH",
3073 .op_rsize_bop = nfsd4_only_status_rsize,
3074 },
3075 [OP_PUTROOTFH] = {
3076 .op_func = nfsd4_putrootfh,
3077 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3078 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3079 .op_name = "OP_PUTROOTFH",
3080 .op_rsize_bop = nfsd4_only_status_rsize,
3081 },
3082 [OP_READ] = {
3083 .op_func = nfsd4_read,
3084 .op_release = nfsd4_read_release,
3085 .op_name = "OP_READ",
3086 .op_rsize_bop = nfsd4_read_rsize,
3087 .op_get_currentstateid = nfsd4_get_readstateid,
3088 },
3089 [OP_READDIR] = {
3090 .op_func = nfsd4_readdir,
3091 .op_name = "OP_READDIR",
3092 .op_rsize_bop = nfsd4_readdir_rsize,
3093 },
3094 [OP_READLINK] = {
3095 .op_func = nfsd4_readlink,
3096 .op_name = "OP_READLINK",
3097 .op_rsize_bop = nfsd4_readlink_rsize,
3098 },
3099 [OP_REMOVE] = {
3100 .op_func = nfsd4_remove,
3101 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3102 .op_name = "OP_REMOVE",
3103 .op_rsize_bop = nfsd4_remove_rsize,
3104 },
3105 [OP_RENAME] = {
3106 .op_func = nfsd4_rename,
3107 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3108 .op_name = "OP_RENAME",
3109 .op_rsize_bop = nfsd4_rename_rsize,
3110 },
3111 [OP_RENEW] = {
3112 .op_func = nfsd4_renew,
3113 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3114 | OP_MODIFIES_SOMETHING,
3115 .op_name = "OP_RENEW",
3116 .op_rsize_bop = nfsd4_only_status_rsize,
3117
3118 },
3119 [OP_RESTOREFH] = {
3120 .op_func = nfsd4_restorefh,
3121 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3122 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
3123 .op_name = "OP_RESTOREFH",
3124 .op_rsize_bop = nfsd4_only_status_rsize,
3125 },
3126 [OP_SAVEFH] = {
3127 .op_func = nfsd4_savefh,
3128 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3129 .op_name = "OP_SAVEFH",
3130 .op_rsize_bop = nfsd4_only_status_rsize,
3131 },
3132 [OP_SECINFO] = {
3133 .op_func = nfsd4_secinfo,
3134 .op_release = nfsd4_secinfo_release,
3135 .op_flags = OP_HANDLES_WRONGSEC,
3136 .op_name = "OP_SECINFO",
3137 .op_rsize_bop = nfsd4_secinfo_rsize,
3138 },
3139 [OP_SETATTR] = {
3140 .op_func = nfsd4_setattr,
3141 .op_name = "OP_SETATTR",
3142 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3143 | OP_NONTRIVIAL_ERROR_ENCODE,
3144 .op_rsize_bop = nfsd4_setattr_rsize,
3145 .op_get_currentstateid = nfsd4_get_setattrstateid,
3146 },
3147 [OP_SETCLIENTID] = {
3148 .op_func = nfsd4_setclientid,
3149 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3150 | OP_MODIFIES_SOMETHING | OP_CACHEME
3151 | OP_NONTRIVIAL_ERROR_ENCODE,
3152 .op_name = "OP_SETCLIENTID",
3153 .op_rsize_bop = nfsd4_setclientid_rsize,
3154 },
3155 [OP_SETCLIENTID_CONFIRM] = {
3156 .op_func = nfsd4_setclientid_confirm,
3157 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3158 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3159 .op_name = "OP_SETCLIENTID_CONFIRM",
3160 .op_rsize_bop = nfsd4_only_status_rsize,
3161 },
3162 [OP_VERIFY] = {
3163 .op_func = nfsd4_verify,
3164 .op_name = "OP_VERIFY",
3165 .op_rsize_bop = nfsd4_only_status_rsize,
3166 },
3167 [OP_WRITE] = {
3168 .op_func = nfsd4_write,
3169 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3170 .op_name = "OP_WRITE",
3171 .op_rsize_bop = nfsd4_write_rsize,
3172 .op_get_currentstateid = nfsd4_get_writestateid,
3173 },
3174 [OP_RELEASE_LOCKOWNER] = {
3175 .op_func = nfsd4_release_lockowner,
3176 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3177 | OP_MODIFIES_SOMETHING,
3178 .op_name = "OP_RELEASE_LOCKOWNER",
3179 .op_rsize_bop = nfsd4_only_status_rsize,
3180 },
3181
3182 /* NFSv4.1 operations */
3183 [OP_EXCHANGE_ID] = {
3184 .op_func = nfsd4_exchange_id,
3185 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3186 | OP_MODIFIES_SOMETHING,
3187 .op_name = "OP_EXCHANGE_ID",
3188 .op_rsize_bop = nfsd4_exchange_id_rsize,
3189 },
3190 [OP_BACKCHANNEL_CTL] = {
3191 .op_func = nfsd4_backchannel_ctl,
3192 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3193 .op_name = "OP_BACKCHANNEL_CTL",
3194 .op_rsize_bop = nfsd4_only_status_rsize,
3195 },
3196 [OP_BIND_CONN_TO_SESSION] = {
3197 .op_func = nfsd4_bind_conn_to_session,
3198 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3199 | OP_MODIFIES_SOMETHING,
3200 .op_name = "OP_BIND_CONN_TO_SESSION",
3201 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3202 },
3203 [OP_CREATE_SESSION] = {
3204 .op_func = nfsd4_create_session,
3205 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3206 | OP_MODIFIES_SOMETHING,
3207 .op_name = "OP_CREATE_SESSION",
3208 .op_rsize_bop = nfsd4_create_session_rsize,
3209 },
3210 [OP_DESTROY_SESSION] = {
3211 .op_func = nfsd4_destroy_session,
3212 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3213 | OP_MODIFIES_SOMETHING,
3214 .op_name = "OP_DESTROY_SESSION",
3215 .op_rsize_bop = nfsd4_only_status_rsize,
3216 },
3217 [OP_SEQUENCE] = {
3218 .op_func = nfsd4_sequence,
3219 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3220 .op_name = "OP_SEQUENCE",
3221 .op_rsize_bop = nfsd4_sequence_rsize,
3222 },
3223 [OP_DESTROY_CLIENTID] = {
3224 .op_func = nfsd4_destroy_clientid,
3225 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3226 | OP_MODIFIES_SOMETHING,
3227 .op_name = "OP_DESTROY_CLIENTID",
3228 .op_rsize_bop = nfsd4_only_status_rsize,
3229 },
3230 [OP_RECLAIM_COMPLETE] = {
3231 .op_func = nfsd4_reclaim_complete,
3232 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3233 .op_name = "OP_RECLAIM_COMPLETE",
3234 .op_rsize_bop = nfsd4_only_status_rsize,
3235 },
3236 [OP_SECINFO_NO_NAME] = {
3237 .op_func = nfsd4_secinfo_no_name,
3238 .op_release = nfsd4_secinfo_no_name_release,
3239 .op_flags = OP_HANDLES_WRONGSEC,
3240 .op_name = "OP_SECINFO_NO_NAME",
3241 .op_rsize_bop = nfsd4_secinfo_rsize,
3242 },
3243 [OP_TEST_STATEID] = {
3244 .op_func = nfsd4_test_stateid,
3245 .op_flags = ALLOWED_WITHOUT_FH,
3246 .op_name = "OP_TEST_STATEID",
3247 .op_rsize_bop = nfsd4_test_stateid_rsize,
3248 },
3249 [OP_FREE_STATEID] = {
3250 .op_func = nfsd4_free_stateid,
3251 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3252 .op_name = "OP_FREE_STATEID",
3253 .op_get_currentstateid = nfsd4_get_freestateid,
3254 .op_rsize_bop = nfsd4_only_status_rsize,
3255 },
3256#ifdef CONFIG_NFSD_PNFS
3257 [OP_GETDEVICEINFO] = {
3258 .op_func = nfsd4_getdeviceinfo,
3259 .op_release = nfsd4_getdeviceinfo_release,
3260 .op_flags = ALLOWED_WITHOUT_FH,
3261 .op_name = "OP_GETDEVICEINFO",
3262 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3263 },
3264 [OP_LAYOUTGET] = {
3265 .op_func = nfsd4_layoutget,
3266 .op_release = nfsd4_layoutget_release,
3267 .op_flags = OP_MODIFIES_SOMETHING,
3268 .op_name = "OP_LAYOUTGET",
3269 .op_rsize_bop = nfsd4_layoutget_rsize,
3270 },
3271 [OP_LAYOUTCOMMIT] = {
3272 .op_func = nfsd4_layoutcommit,
3273 .op_flags = OP_MODIFIES_SOMETHING,
3274 .op_name = "OP_LAYOUTCOMMIT",
3275 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3276 },
3277 [OP_LAYOUTRETURN] = {
3278 .op_func = nfsd4_layoutreturn,
3279 .op_flags = OP_MODIFIES_SOMETHING,
3280 .op_name = "OP_LAYOUTRETURN",
3281 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3282 },
3283#endif /* CONFIG_NFSD_PNFS */
3284
3285 /* NFSv4.2 operations */
3286 [OP_ALLOCATE] = {
3287 .op_func = nfsd4_allocate,
3288 .op_flags = OP_MODIFIES_SOMETHING,
3289 .op_name = "OP_ALLOCATE",
3290 .op_rsize_bop = nfsd4_only_status_rsize,
3291 },
3292 [OP_DEALLOCATE] = {
3293 .op_func = nfsd4_deallocate,
3294 .op_flags = OP_MODIFIES_SOMETHING,
3295 .op_name = "OP_DEALLOCATE",
3296 .op_rsize_bop = nfsd4_only_status_rsize,
3297 },
3298 [OP_CLONE] = {
3299 .op_func = nfsd4_clone,
3300 .op_flags = OP_MODIFIES_SOMETHING,
3301 .op_name = "OP_CLONE",
3302 .op_rsize_bop = nfsd4_only_status_rsize,
3303 },
3304 [OP_COPY] = {
3305 .op_func = nfsd4_copy,
3306 .op_flags = OP_MODIFIES_SOMETHING,
3307 .op_name = "OP_COPY",
3308 .op_rsize_bop = nfsd4_copy_rsize,
3309 },
3310 [OP_READ_PLUS] = {
3311 .op_func = nfsd4_read,
3312 .op_release = nfsd4_read_release,
3313 .op_name = "OP_READ_PLUS",
3314 .op_rsize_bop = nfsd4_read_plus_rsize,
3315 .op_get_currentstateid = nfsd4_get_readstateid,
3316 },
3317 [OP_SEEK] = {
3318 .op_func = nfsd4_seek,
3319 .op_name = "OP_SEEK",
3320 .op_rsize_bop = nfsd4_seek_rsize,
3321 },
3322 [OP_OFFLOAD_STATUS] = {
3323 .op_func = nfsd4_offload_status,
3324 .op_name = "OP_OFFLOAD_STATUS",
3325 .op_rsize_bop = nfsd4_offload_status_rsize,
3326 },
3327 [OP_OFFLOAD_CANCEL] = {
3328 .op_func = nfsd4_offload_cancel,
3329 .op_flags = OP_MODIFIES_SOMETHING,
3330 .op_name = "OP_OFFLOAD_CANCEL",
3331 .op_rsize_bop = nfsd4_only_status_rsize,
3332 },
3333 [OP_COPY_NOTIFY] = {
3334 .op_func = nfsd4_copy_notify,
3335 .op_flags = OP_MODIFIES_SOMETHING,
3336 .op_name = "OP_COPY_NOTIFY",
3337 .op_rsize_bop = nfsd4_copy_notify_rsize,
3338 },
3339 [OP_GETXATTR] = {
3340 .op_func = nfsd4_getxattr,
3341 .op_name = "OP_GETXATTR",
3342 .op_rsize_bop = nfsd4_getxattr_rsize,
3343 },
3344 [OP_SETXATTR] = {
3345 .op_func = nfsd4_setxattr,
3346 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3347 .op_name = "OP_SETXATTR",
3348 .op_rsize_bop = nfsd4_setxattr_rsize,
3349 },
3350 [OP_LISTXATTRS] = {
3351 .op_func = nfsd4_listxattrs,
3352 .op_name = "OP_LISTXATTRS",
3353 .op_rsize_bop = nfsd4_listxattrs_rsize,
3354 },
3355 [OP_REMOVEXATTR] = {
3356 .op_func = nfsd4_removexattr,
3357 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3358 .op_name = "OP_REMOVEXATTR",
3359 .op_rsize_bop = nfsd4_removexattr_rsize,
3360 },
3361};
3362
3363/**
3364 * nfsd4_spo_must_allow - Determine if the compound op contains an
3365 * operation that is allowed to be sent with machine credentials
3366 *
3367 * @rqstp: a pointer to the struct svc_rqst
3368 *
3369 * Checks to see if the compound contains a spo_must_allow op
3370 * and confirms that it was sent with the proper machine creds.
3371 */
3372
3373bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3374{
3375 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3376 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3377 struct nfsd4_op *this;
3378 struct nfsd4_compound_state *cstate = &resp->cstate;
3379 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3380 u32 opiter;
3381
3382 if (!cstate->minorversion)
3383 return false;
3384
3385 if (cstate->spo_must_allowed)
3386 return true;
3387
3388 opiter = resp->opcnt;
3389 while (opiter < argp->opcnt) {
3390 this = &argp->ops[opiter++];
3391 if (test_bit(this->opnum, allow->u.longs) &&
3392 cstate->clp->cl_mach_cred &&
3393 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3394 cstate->spo_must_allowed = true;
3395 return true;
3396 }
3397 }
3398 cstate->spo_must_allowed = false;
3399 return false;
3400}
3401
3402int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3403{
3404 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3405 return op_encode_hdr_size * sizeof(__be32);
3406
3407 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3408 return OPDESC(op)->op_rsize_bop(rqstp, op);
3409}
3410
3411void warn_on_nonidempotent_op(struct nfsd4_op *op)
3412{
3413 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3414 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
3415 op->opnum, nfsd4_op_name(op->opnum));
3416 WARN_ON_ONCE(1);
3417 }
3418}
3419
3420static const char *nfsd4_op_name(unsigned opnum)
3421{
3422 if (opnum < ARRAY_SIZE(nfsd4_ops))
3423 return nfsd4_ops[opnum].op_name;
3424 return "unknown_operation";
3425}
3426
3427static const struct svc_procedure nfsd_procedures4[2] = {
3428 [NFSPROC4_NULL] = {
3429 .pc_func = nfsd4_proc_null,
3430 .pc_decode = nfssvc_decode_voidarg,
3431 .pc_encode = nfssvc_encode_voidres,
3432 .pc_argsize = sizeof(struct nfsd_voidargs),
3433 .pc_ressize = sizeof(struct nfsd_voidres),
3434 .pc_cachetype = RC_NOCACHE,
3435 .pc_xdrressize = 1,
3436 .pc_name = "NULL",
3437 },
3438 [NFSPROC4_COMPOUND] = {
3439 .pc_func = nfsd4_proc_compound,
3440 .pc_decode = nfs4svc_decode_compoundargs,
3441 .pc_encode = nfs4svc_encode_compoundres,
3442 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3443 .pc_ressize = sizeof(struct nfsd4_compoundres),
3444 .pc_release = nfsd4_release_compoundargs,
3445 .pc_cachetype = RC_NOCACHE,
3446 .pc_xdrressize = NFSD_BUFSIZE/4,
3447 .pc_name = "COMPOUND",
3448 },
3449};
3450
3451static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3452const struct svc_version nfsd_version4 = {
3453 .vs_vers = 4,
3454 .vs_nproc = 2,
3455 .vs_proc = nfsd_procedures4,
3456 .vs_count = nfsd_count3,
3457 .vs_dispatch = nfsd_dispatch,
3458 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3459 .vs_rpcb_optnl = true,
3460 .vs_need_cong_ctrl = true,
3461};