nfsd: fix b0rken error value for setattr on read-only mount
[pandora-kernel.git] / fs / nfsd / nfs4proc.c
1 /*
2  *  Server-side procedures for NFSv4.
3  *
4  *  Copyright (c) 2002 The Regents of the University of Michigan.
5  *  All rights reserved.
6  *
7  *  Kendrick Smith <kmsmith@umich.edu>
8  *  Andy Adamson   <andros@umich.edu>
9  *
10  *  Redistribution and use in source and binary forms, with or without
11  *  modification, are permitted provided that the following conditions
12  *  are met:
13  *
14  *  1. Redistributions of source code must retain the above copyright
15  *     notice, this list of conditions and the following disclaimer.
16  *  2. Redistributions in binary form must reproduce the above copyright
17  *     notice, this list of conditions and the following disclaimer in the
18  *     documentation and/or other materials provided with the distribution.
19  *  3. Neither the name of the University nor the names of its
20  *     contributors may be used to endorse or promote products derived
21  *     from this software without specific prior written permission.
22  *
23  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42
43 #define NFSDDBG_FACILITY                NFSDDBG_PROC
44
45 static u32 nfsd_attrmask[] = {
46         NFSD_WRITEABLE_ATTRS_WORD0,
47         NFSD_WRITEABLE_ATTRS_WORD1,
48         NFSD_WRITEABLE_ATTRS_WORD2
49 };
50
51 static u32 nfsd41_ex_attrmask[] = {
52         NFSD_SUPPATTR_EXCLCREAT_WORD0,
53         NFSD_SUPPATTR_EXCLCREAT_WORD1,
54         NFSD_SUPPATTR_EXCLCREAT_WORD2
55 };
56
57 static __be32
58 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
59                    u32 *bmval, u32 *writable)
60 {
61         struct dentry *dentry = cstate->current_fh.fh_dentry;
62
63         /*
64          * Check about attributes are supported by the NFSv4 server or not.
65          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
66          */
67         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
68             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
69             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
70                 return nfserr_attrnotsupp;
71
72         /*
73          * Check FATTR4_WORD0_ACL can be supported
74          * in current environment or not.
75          */
76         if (bmval[0] & FATTR4_WORD0_ACL) {
77                 if (!IS_POSIXACL(dentry->d_inode))
78                         return nfserr_attrnotsupp;
79         }
80
81         /*
82          * According to spec, read-only attributes return ERR_INVAL.
83          */
84         if (writable) {
85                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
86                     (bmval[2] & ~writable[2]))
87                         return nfserr_inval;
88         }
89
90         return nfs_ok;
91 }
92
93 static __be32
94 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
95         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
96 {
97         __be32 status = nfs_ok;
98
99         if (open->op_create == NFS4_OPEN_CREATE) {
100                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
101                     || open->op_createmode == NFS4_CREATE_GUARDED)
102                         status = check_attr_support(rqstp, cstate,
103                                         open->op_bmval, nfsd_attrmask);
104                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
105                         status = check_attr_support(rqstp, cstate,
106                                         open->op_bmval, nfsd41_ex_attrmask);
107         }
108
109         return status;
110 }
111
112 static int
113 is_create_with_attrs(struct nfsd4_open *open)
114 {
115         return open->op_create == NFS4_OPEN_CREATE
116                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
117                     || open->op_createmode == NFS4_CREATE_GUARDED
118                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
119 }
120
121 /*
122  * if error occurs when setting the acl, just clear the acl bit
123  * in the returned attr bitmap.
124  */
125 static void
126 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
127                 struct nfs4_acl *acl, u32 *bmval)
128 {
129         __be32 status;
130
131         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
132         if (status)
133                 /*
134                  * We should probably fail the whole open at this point,
135                  * but we've already created the file, so it's too late;
136                  * So this seems the least of evils:
137                  */
138                 bmval[0] &= ~FATTR4_WORD0_ACL;
139 }
140
141 static inline void
142 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
143 {
144         fh_put(dst);
145         dget(src->fh_dentry);
146         if (src->fh_export)
147                 cache_get(&src->fh_export->h);
148         *dst = *src;
149 }
150
151 static __be32
152 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
153 {
154         __be32 status;
155
156         if (open->op_truncate &&
157                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
158                 return nfserr_inval;
159
160         accmode |= NFSD_MAY_READ_IF_EXEC;
161
162         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
163                 accmode |= NFSD_MAY_READ;
164         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
165                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
166         if (open->op_share_deny & NFS4_SHARE_DENY_READ)
167                 accmode |= NFSD_MAY_WRITE;
168
169         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
170
171         return status;
172 }
173
174 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
175 {
176         umode_t mode = fh->fh_dentry->d_inode->i_mode;
177
178         if (S_ISREG(mode))
179                 return nfs_ok;
180         if (S_ISDIR(mode))
181                 return nfserr_isdir;
182         /*
183          * Using err_symlink as our catch-all case may look odd; but
184          * there's no other obvious error for this case in 4.0, and we
185          * happen to know that it will cause the linux v4 client to do
186          * the right thing on attempts to open something other than a
187          * regular file.
188          */
189         return nfserr_symlink;
190 }
191
192 static __be32
193 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
194 {
195         struct svc_fh resfh;
196         __be32 status;
197
198         fh_init(&resfh, NFS4_FHSIZE);
199         open->op_truncate = 0;
200
201         if (open->op_create) {
202                 /* FIXME: check session persistence and pnfs flags.
203                  * The nfsv4.1 spec requires the following semantics:
204                  *
205                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
206                  * Reply Cache  | server |                 |
207                  * -------------+--------+-----------------+--------------------
208                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
209                  *              |        |                 | (SHOULD)
210                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
211                  *              |        |                 | (SHOULD NOT)
212                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
213                  * yes          | no     | GUARDED4        | GUARDED4
214                  * yes          | yes    | GUARDED4        | GUARDED4
215                  */
216
217                 /*
218                  * Note: create modes (UNCHECKED,GUARDED...) are the same
219                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
220                  */
221                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
222                                         open->op_fname.len, &open->op_iattr,
223                                         &resfh, open->op_createmode,
224                                         (u32 *)open->op_verf.data,
225                                         &open->op_truncate, &open->op_created);
226
227                 /*
228                  * Following rfc 3530 14.2.16, use the returned bitmask
229                  * to indicate which attributes we used to store the
230                  * verifier:
231                  */
232                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
233                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
234                                                 FATTR4_WORD1_TIME_MODIFY);
235         } else {
236                 status = nfsd_lookup(rqstp, current_fh,
237                                      open->op_fname.data, open->op_fname.len, &resfh);
238                 fh_unlock(current_fh);
239                 if (status)
240                         goto out;
241                 status = nfsd_check_obj_isreg(&resfh);
242         }
243         if (status)
244                 goto out;
245
246         if (is_create_with_attrs(open) && open->op_acl != NULL)
247                 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
248
249         set_change_info(&open->op_cinfo, current_fh);
250         fh_dup2(current_fh, &resfh);
251
252         /* set reply cache */
253         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
254                         &resfh.fh_handle);
255         if (!open->op_created)
256                 status = do_open_permission(rqstp, current_fh, open,
257                                             NFSD_MAY_NOP);
258
259 out:
260         fh_put(&resfh);
261         return status;
262 }
263
264 static __be32
265 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
266 {
267         __be32 status;
268
269         /* Only reclaims from previously confirmed clients are valid */
270         if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
271                 return status;
272
273         /* We don't know the target directory, and therefore can not
274         * set the change info
275         */
276
277         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
278
279         /* set replay cache */
280         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
281                         &current_fh->fh_handle);
282
283         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
284                 (open->op_iattr.ia_size == 0);
285
286         status = do_open_permission(rqstp, current_fh, open,
287                                     NFSD_MAY_OWNER_OVERRIDE);
288
289         return status;
290 }
291
292 static void
293 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
294 {
295         struct nfsd4_sessionid *sid =
296                         (struct nfsd4_sessionid *)session->se_sessionid.data;
297
298         clid->cl_boot = sid->clientid.cl_boot;
299         clid->cl_id = sid->clientid.cl_id;
300 }
301
302 static __be32
303 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
304            struct nfsd4_open *open)
305 {
306         __be32 status;
307         struct nfsd4_compoundres *resp;
308
309         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
310                 (int)open->op_fname.len, open->op_fname.data,
311                 open->op_openowner);
312
313         /* This check required by spec. */
314         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
315                 return nfserr_inval;
316
317         /* We don't yet support WANT bits: */
318         open->op_share_access &= NFS4_SHARE_ACCESS_MASK;
319
320         open->op_created = 0;
321         /*
322          * RFC5661 18.51.3
323          * Before RECLAIM_COMPLETE done, server should deny new lock
324          */
325         if (nfsd4_has_session(cstate) &&
326             !cstate->session->se_client->cl_firststate &&
327             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
328                 return nfserr_grace;
329
330         if (nfsd4_has_session(cstate))
331                 copy_clientid(&open->op_clientid, cstate->session);
332
333         nfs4_lock_state();
334
335         /* check seqid for replay. set nfs4_owner */
336         resp = rqstp->rq_resp;
337         status = nfsd4_process_open1(&resp->cstate, open);
338         if (status == nfserr_replay_me) {
339                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
340                 fh_put(&cstate->current_fh);
341                 fh_copy_shallow(&cstate->current_fh.fh_handle,
342                                 &rp->rp_openfh);
343                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
344                 if (status)
345                         dprintk("nfsd4_open: replay failed"
346                                 " restoring previous filehandle\n");
347                 else
348                         status = nfserr_replay_me;
349         }
350         if (status)
351                 goto out;
352
353         status = nfsd4_check_open_attributes(rqstp, cstate, open);
354         if (status)
355                 goto out;
356
357         /* Openowner is now set, so sequence id will get bumped.  Now we need
358          * these checks before we do any creates: */
359         status = nfserr_grace;
360         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
361                 goto out;
362         status = nfserr_no_grace;
363         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
364                 goto out;
365
366         switch (open->op_claim_type) {
367                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
368                 case NFS4_OPEN_CLAIM_NULL:
369                         status = do_open_lookup(rqstp, &cstate->current_fh,
370                                                 open);
371                         if (status)
372                                 goto out;
373                         break;
374                 case NFS4_OPEN_CLAIM_PREVIOUS:
375                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
376                 case NFS4_OPEN_CLAIM_FH:
377                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
378                         status = do_open_fhandle(rqstp, &cstate->current_fh,
379                                                  open);
380                         if (status)
381                                 goto out;
382                         break;
383                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
384                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
385                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
386                         dprintk("NFSD: unsupported OPEN claim type %d\n",
387                                 open->op_claim_type);
388                         status = nfserr_notsupp;
389                         goto out;
390                 default:
391                         dprintk("NFSD: Invalid OPEN claim type %d\n",
392                                 open->op_claim_type);
393                         status = nfserr_inval;
394                         goto out;
395         }
396         /*
397          * nfsd4_process_open2() does the actual opening of the file.  If
398          * successful, it (1) truncates the file if open->op_truncate was
399          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
400          */
401         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
402         WARN_ON(status && open->op_created);
403 out:
404         nfsd4_cleanup_open_state(open, status);
405         if (open->op_openowner)
406                 cstate->replay_owner = &open->op_openowner->oo_owner;
407         else
408                 nfs4_unlock_state();
409         return status;
410 }
411
412 /*
413  * filehandle-manipulating ops.
414  */
415 static __be32
416 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
417             struct svc_fh **getfh)
418 {
419         if (!cstate->current_fh.fh_dentry)
420                 return nfserr_nofilehandle;
421
422         *getfh = &cstate->current_fh;
423         return nfs_ok;
424 }
425
426 static __be32
427 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
428             struct nfsd4_putfh *putfh)
429 {
430         fh_put(&cstate->current_fh);
431         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
432         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
433                putfh->pf_fhlen);
434         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
435 }
436
437 static __be32
438 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
439                 void *arg)
440 {
441         __be32 status;
442
443         fh_put(&cstate->current_fh);
444         status = exp_pseudoroot(rqstp, &cstate->current_fh);
445         return status;
446 }
447
448 static __be32
449 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
450                 void *arg)
451 {
452         if (!cstate->save_fh.fh_dentry)
453                 return nfserr_restorefh;
454
455         fh_dup2(&cstate->current_fh, &cstate->save_fh);
456         return nfs_ok;
457 }
458
459 static __be32
460 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
461              void *arg)
462 {
463         if (!cstate->current_fh.fh_dentry)
464                 return nfserr_nofilehandle;
465
466         fh_dup2(&cstate->save_fh, &cstate->current_fh);
467         return nfs_ok;
468 }
469
470 /*
471  * misc nfsv4 ops
472  */
473 static __be32
474 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
475              struct nfsd4_access *access)
476 {
477         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
478                 return nfserr_inval;
479
480         access->ac_resp_access = access->ac_req_access;
481         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
482                            &access->ac_supported);
483 }
484
485 static __be32
486 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
487              struct nfsd4_commit *commit)
488 {
489         u32 *p = (u32 *)commit->co_verf.data;
490         *p++ = nfssvc_boot.tv_sec;
491         *p++ = nfssvc_boot.tv_usec;
492
493         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
494                              commit->co_count);
495 }
496
497 static __be32
498 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499              struct nfsd4_create *create)
500 {
501         struct svc_fh resfh;
502         __be32 status;
503         dev_t rdev;
504
505         fh_init(&resfh, NFS4_FHSIZE);
506
507         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
508                            NFSD_MAY_CREATE);
509         if (status)
510                 return status;
511
512         status = check_attr_support(rqstp, cstate, create->cr_bmval,
513                                     nfsd_attrmask);
514         if (status)
515                 return status;
516
517         switch (create->cr_type) {
518         case NF4LNK:
519                 /* ugh! we have to null-terminate the linktext, or
520                  * vfs_symlink() will choke.  it is always safe to
521                  * null-terminate by brute force, since at worst we
522                  * will overwrite the first byte of the create namelen
523                  * in the XDR buffer, which has already been extracted
524                  * during XDR decode.
525                  */
526                 create->cr_linkname[create->cr_linklen] = 0;
527
528                 status = nfsd_symlink(rqstp, &cstate->current_fh,
529                                       create->cr_name, create->cr_namelen,
530                                       create->cr_linkname, create->cr_linklen,
531                                       &resfh, &create->cr_iattr);
532                 break;
533
534         case NF4BLK:
535                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
536                 if (MAJOR(rdev) != create->cr_specdata1 ||
537                     MINOR(rdev) != create->cr_specdata2)
538                         return nfserr_inval;
539                 status = nfsd_create(rqstp, &cstate->current_fh,
540                                      create->cr_name, create->cr_namelen,
541                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
542                 break;
543
544         case NF4CHR:
545                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
546                 if (MAJOR(rdev) != create->cr_specdata1 ||
547                     MINOR(rdev) != create->cr_specdata2)
548                         return nfserr_inval;
549                 status = nfsd_create(rqstp, &cstate->current_fh,
550                                      create->cr_name, create->cr_namelen,
551                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
552                 break;
553
554         case NF4SOCK:
555                 status = nfsd_create(rqstp, &cstate->current_fh,
556                                      create->cr_name, create->cr_namelen,
557                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
558                 break;
559
560         case NF4FIFO:
561                 status = nfsd_create(rqstp, &cstate->current_fh,
562                                      create->cr_name, create->cr_namelen,
563                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
564                 break;
565
566         case NF4DIR:
567                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
568                 status = nfsd_create(rqstp, &cstate->current_fh,
569                                      create->cr_name, create->cr_namelen,
570                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
571                 break;
572
573         default:
574                 status = nfserr_badtype;
575         }
576
577         if (status)
578                 goto out;
579
580         if (create->cr_acl != NULL)
581                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
582                                 create->cr_bmval);
583
584         fh_unlock(&cstate->current_fh);
585         set_change_info(&create->cr_cinfo, &cstate->current_fh);
586         fh_dup2(&cstate->current_fh, &resfh);
587 out:
588         fh_put(&resfh);
589         return status;
590 }
591
592 static __be32
593 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
594               struct nfsd4_getattr *getattr)
595 {
596         __be32 status;
597
598         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
599         if (status)
600                 return status;
601
602         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
603                 return nfserr_inval;
604
605         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
606         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
607         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
608
609         getattr->ga_fhp = &cstate->current_fh;
610         return nfs_ok;
611 }
612
613 static __be32
614 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
615            struct nfsd4_link *link)
616 {
617         __be32 status = nfserr_nofilehandle;
618
619         if (!cstate->save_fh.fh_dentry)
620                 return status;
621         status = nfsd_link(rqstp, &cstate->current_fh,
622                            link->li_name, link->li_namelen, &cstate->save_fh);
623         if (!status)
624                 set_change_info(&link->li_cinfo, &cstate->current_fh);
625         return status;
626 }
627
628 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
629 {
630         struct svc_fh tmp_fh;
631         __be32 ret;
632
633         fh_init(&tmp_fh, NFS4_FHSIZE);
634         ret = exp_pseudoroot(rqstp, &tmp_fh);
635         if (ret)
636                 return ret;
637         if (tmp_fh.fh_dentry == fh->fh_dentry) {
638                 fh_put(&tmp_fh);
639                 return nfserr_noent;
640         }
641         fh_put(&tmp_fh);
642         return nfsd_lookup(rqstp, fh, "..", 2, fh);
643 }
644
645 static __be32
646 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
647               void *arg)
648 {
649         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
650 }
651
652 static __be32
653 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
654              struct nfsd4_lookup *lookup)
655 {
656         return nfsd_lookup(rqstp, &cstate->current_fh,
657                            lookup->lo_name, lookup->lo_len,
658                            &cstate->current_fh);
659 }
660
661 static __be32
662 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
663            struct nfsd4_read *read)
664 {
665         __be32 status;
666
667         /* no need to check permission - this will be done in nfsd_read() */
668
669         read->rd_filp = NULL;
670         if (read->rd_offset >= OFFSET_MAX)
671                 return nfserr_inval;
672
673         nfs4_lock_state();
674         /* check stateid */
675         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
676                                                  RD_STATE, &read->rd_filp))) {
677                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
678                 goto out;
679         }
680         if (read->rd_filp)
681                 get_file(read->rd_filp);
682         status = nfs_ok;
683 out:
684         nfs4_unlock_state();
685         read->rd_rqstp = rqstp;
686         read->rd_fhp = &cstate->current_fh;
687         return status;
688 }
689
690 static __be32
691 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
692               struct nfsd4_readdir *readdir)
693 {
694         u64 cookie = readdir->rd_cookie;
695         static const nfs4_verifier zeroverf;
696
697         /* no need to check permission - this will be done in nfsd_readdir() */
698
699         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
700                 return nfserr_inval;
701
702         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
703         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
704         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
705
706         if ((cookie == 1) || (cookie == 2) ||
707             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
708                 return nfserr_bad_cookie;
709
710         readdir->rd_rqstp = rqstp;
711         readdir->rd_fhp = &cstate->current_fh;
712         return nfs_ok;
713 }
714
715 static __be32
716 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
717                struct nfsd4_readlink *readlink)
718 {
719         readlink->rl_rqstp = rqstp;
720         readlink->rl_fhp = &cstate->current_fh;
721         return nfs_ok;
722 }
723
724 static __be32
725 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726              struct nfsd4_remove *remove)
727 {
728         __be32 status;
729
730         if (locks_in_grace())
731                 return nfserr_grace;
732         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
733                              remove->rm_name, remove->rm_namelen);
734         if (!status) {
735                 fh_unlock(&cstate->current_fh);
736                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
737         }
738         return status;
739 }
740
741 static __be32
742 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
743              struct nfsd4_rename *rename)
744 {
745         __be32 status = nfserr_nofilehandle;
746
747         if (!cstate->save_fh.fh_dentry)
748                 return status;
749         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
750                                         & NFSEXP_NOSUBTREECHECK))
751                 return nfserr_grace;
752         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
753                              rename->rn_snamelen, &cstate->current_fh,
754                              rename->rn_tname, rename->rn_tnamelen);
755
756         /* the underlying filesystem returns different error's than required
757          * by NFSv4. both save_fh and current_fh have been verified.. */
758         if (status == nfserr_isdir)
759                 status = nfserr_exist;
760         else if ((status == nfserr_notdir) &&
761                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
762                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
763                 status = nfserr_exist;
764
765         if (!status) {
766                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
767                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
768         }
769         return status;
770 }
771
772 static __be32
773 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
774               struct nfsd4_secinfo *secinfo)
775 {
776         struct svc_fh resfh;
777         struct svc_export *exp;
778         struct dentry *dentry;
779         __be32 err;
780
781         fh_init(&resfh, NFS4_FHSIZE);
782         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
783         if (err)
784                 return err;
785         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
786                                     secinfo->si_name, secinfo->si_namelen,
787                                     &exp, &dentry);
788         if (err)
789                 return err;
790         if (dentry->d_inode == NULL) {
791                 exp_put(exp);
792                 err = nfserr_noent;
793         } else
794                 secinfo->si_exp = exp;
795         dput(dentry);
796         if (cstate->minorversion)
797                 /* See rfc 5661 section 2.6.3.1.1.8 */
798                 fh_put(&cstate->current_fh);
799         return err;
800 }
801
802 static __be32
803 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
804               struct nfsd4_secinfo_no_name *sin)
805 {
806         __be32 err;
807
808         switch (sin->sin_style) {
809         case NFS4_SECINFO_STYLE4_CURRENT_FH:
810                 break;
811         case NFS4_SECINFO_STYLE4_PARENT:
812                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
813                 if (err)
814                         return err;
815                 break;
816         default:
817                 return nfserr_inval;
818         }
819         exp_get(cstate->current_fh.fh_export);
820         sin->sin_exp = cstate->current_fh.fh_export;
821         fh_put(&cstate->current_fh);
822         return nfs_ok;
823 }
824
825 static __be32
826 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
827               struct nfsd4_setattr *setattr)
828 {
829         __be32 status = nfs_ok;
830         int err;
831
832         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
833                 nfs4_lock_state();
834                 status = nfs4_preprocess_stateid_op(cstate,
835                         &setattr->sa_stateid, WR_STATE, NULL);
836                 nfs4_unlock_state();
837                 if (status) {
838                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
839                         return status;
840                 }
841         }
842         err = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
843         if (err)
844                 return nfserrno(err);
845         status = nfs_ok;
846
847         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
848                                     nfsd_attrmask);
849         if (status)
850                 goto out;
851
852         if (setattr->sa_acl != NULL)
853                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
854                                             setattr->sa_acl);
855         if (status)
856                 goto out;
857         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
858                                 0, (time_t)0);
859 out:
860         mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
861         return status;
862 }
863
864 static __be32
865 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
866             struct nfsd4_write *write)
867 {
868         stateid_t *stateid = &write->wr_stateid;
869         struct file *filp = NULL;
870         u32 *p;
871         __be32 status = nfs_ok;
872         unsigned long cnt;
873
874         /* no need to check permission - this will be done in nfsd_write() */
875
876         if (write->wr_offset >= OFFSET_MAX)
877                 return nfserr_inval;
878
879         nfs4_lock_state();
880         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
881         if (filp)
882                 get_file(filp);
883         nfs4_unlock_state();
884
885         if (status) {
886                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
887                 return status;
888         }
889
890         cnt = write->wr_buflen;
891         write->wr_how_written = write->wr_stable_how;
892         p = (u32 *)write->wr_verifier.data;
893         *p++ = nfssvc_boot.tv_sec;
894         *p++ = nfssvc_boot.tv_usec;
895
896         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
897                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
898                              &cnt, &write->wr_how_written);
899         if (filp)
900                 fput(filp);
901
902         write->wr_bytes_written = cnt;
903
904         return status;
905 }
906
907 /* This routine never returns NFS_OK!  If there are no other errors, it
908  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
909  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
910  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
911  */
912 static __be32
913 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
914              struct nfsd4_verify *verify)
915 {
916         __be32 *buf, *p;
917         int count;
918         __be32 status;
919
920         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
921         if (status)
922                 return status;
923
924         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
925         if (status)
926                 return status;
927
928         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
929             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
930                 return nfserr_inval;
931         if (verify->ve_attrlen & 3)
932                 return nfserr_inval;
933
934         /* count in words:
935          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
936          */
937         count = 4 + (verify->ve_attrlen >> 2);
938         buf = kmalloc(count << 2, GFP_KERNEL);
939         if (!buf)
940                 return nfserr_jukebox;
941
942         status = nfsd4_encode_fattr(&cstate->current_fh,
943                                     cstate->current_fh.fh_export,
944                                     cstate->current_fh.fh_dentry, buf,
945                                     &count, verify->ve_bmval,
946                                     rqstp, 0);
947
948         /* this means that nfsd4_encode_fattr() ran out of space */
949         if (status == nfserr_resource && count == 0)
950                 status = nfserr_not_same;
951         if (status)
952                 goto out_kfree;
953
954         /* skip bitmap */
955         p = buf + 1 + ntohl(buf[0]);
956         status = nfserr_not_same;
957         if (ntohl(*p++) != verify->ve_attrlen)
958                 goto out_kfree;
959         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
960                 status = nfserr_same;
961
962 out_kfree:
963         kfree(buf);
964         return status;
965 }
966
967 static __be32
968 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
969               struct nfsd4_verify *verify)
970 {
971         __be32 status;
972
973         status = _nfsd4_verify(rqstp, cstate, verify);
974         return status == nfserr_not_same ? nfs_ok : status;
975 }
976
977 static __be32
978 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
979              struct nfsd4_verify *verify)
980 {
981         __be32 status;
982
983         status = _nfsd4_verify(rqstp, cstate, verify);
984         return status == nfserr_same ? nfs_ok : status;
985 }
986
987 /*
988  * NULL call.
989  */
990 static __be32
991 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
992 {
993         return nfs_ok;
994 }
995
996 static inline void nfsd4_increment_op_stats(u32 opnum)
997 {
998         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
999                 nfsdstats.nfs4_opcount[opnum]++;
1000 }
1001
1002 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1003                               void *);
1004 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1005
1006 enum nfsd4_op_flags {
1007         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1008         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1009         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1010         /* For rfc 5661 section 2.6.3.1.1: */
1011         OP_HANDLES_WRONGSEC = 1 << 3,
1012         OP_IS_PUTFH_LIKE = 1 << 4,
1013         /*
1014          * These are the ops whose result size we estimate before
1015          * encoding, to avoid performing an op then not being able to
1016          * respond or cache a response.  This includes writes and setattrs
1017          * as well as the operations usually called "nonidempotent":
1018          */
1019         OP_MODIFIES_SOMETHING = 1 << 5,
1020         /*
1021          * Cache compounds containing these ops in the xid-based drc:
1022          * We use the DRC for compounds containing non-idempotent
1023          * operations, *except* those that are 4.1-specific (since
1024          * sessions provide their own EOS), and except for stateful
1025          * operations other than setclientid and setclientid_confirm
1026          * (since sequence numbers provide EOS for open, lock, etc in
1027          * the v4.0 case).
1028          */
1029         OP_CACHEME = 1 << 6,
1030 };
1031
1032 struct nfsd4_operation {
1033         nfsd4op_func op_func;
1034         u32 op_flags;
1035         char *op_name;
1036         /* Try to get response size before operation */
1037         nfsd4op_rsize op_rsize_bop;
1038 };
1039
1040 static struct nfsd4_operation nfsd4_ops[];
1041
1042 static const char *nfsd4_op_name(unsigned opnum);
1043
1044 /*
1045  * Enforce NFSv4.1 COMPOUND ordering rules:
1046  *
1047  * Also note, enforced elsewhere:
1048  *      - SEQUENCE other than as first op results in
1049  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1050  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1051  *        (Enforced in nfsd4_bind_conn_to_session().)
1052  *      - DESTROY_SESSION must be the final operation in a compound, if
1053  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1054  *        (Enforced in nfsd4_destroy_session().)
1055  */
1056 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1057 {
1058         struct nfsd4_op *op = &args->ops[0];
1059
1060         /* These ordering requirements don't apply to NFSv4.0: */
1061         if (args->minorversion == 0)
1062                 return nfs_ok;
1063         /* This is weird, but OK, not our problem: */
1064         if (args->opcnt == 0)
1065                 return nfs_ok;
1066         if (op->status == nfserr_op_illegal)
1067                 return nfs_ok;
1068         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1069                 return nfserr_op_not_in_session;
1070         if (op->opnum == OP_SEQUENCE)
1071                 return nfs_ok;
1072         if (args->opcnt != 1)
1073                 return nfserr_not_only_op;
1074         return nfs_ok;
1075 }
1076
1077 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1078 {
1079         return &nfsd4_ops[op->opnum];
1080 }
1081
1082 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1083 {
1084         return OPDESC(op)->op_flags & OP_CACHEME;
1085 }
1086
1087 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1088 {
1089         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1090         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1091         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1092         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1093         struct nfsd4_operation *thisd;
1094         struct nfsd4_operation *nextd;
1095
1096         thisd = OPDESC(this);
1097         /*
1098          * Most ops check wronsec on our own; only the putfh-like ops
1099          * have special rules.
1100          */
1101         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1102                 return false;
1103         /*
1104          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1105          * put-filehandle operation if we're not going to use the
1106          * result:
1107          */
1108         if (argp->opcnt == resp->opcnt)
1109                 return false;
1110
1111         nextd = OPDESC(next);
1112         /*
1113          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1114          * errors themselves as necessary; others should check for them
1115          * now:
1116          */
1117         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1118 }
1119
1120 /*
1121  * COMPOUND call.
1122  */
1123 static __be32
1124 nfsd4_proc_compound(struct svc_rqst *rqstp,
1125                     struct nfsd4_compoundargs *args,
1126                     struct nfsd4_compoundres *resp)
1127 {
1128         struct nfsd4_op *op;
1129         struct nfsd4_operation *opdesc;
1130         struct nfsd4_compound_state *cstate = &resp->cstate;
1131         int             slack_bytes;
1132         u32             plen = 0;
1133         __be32          status;
1134
1135         resp->xbuf = &rqstp->rq_res;
1136         resp->p = rqstp->rq_res.head[0].iov_base +
1137                                                 rqstp->rq_res.head[0].iov_len;
1138         resp->tagp = resp->p;
1139         /* reserve space for: taglen, tag, and opcnt */
1140         resp->p += 2 + XDR_QUADLEN(args->taglen);
1141         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1142         resp->taglen = args->taglen;
1143         resp->tag = args->tag;
1144         resp->opcnt = 0;
1145         resp->rqstp = rqstp;
1146         resp->cstate.minorversion = args->minorversion;
1147         resp->cstate.replay_owner = NULL;
1148         resp->cstate.session = NULL;
1149         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1150         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1151         /*
1152          * Don't use the deferral mechanism for NFSv4; compounds make it
1153          * too hard to avoid non-idempotency problems.
1154          */
1155         rqstp->rq_usedeferral = 0;
1156
1157         /*
1158          * According to RFC3010, this takes precedence over all other errors.
1159          */
1160         status = nfserr_minor_vers_mismatch;
1161         if (args->minorversion > nfsd_supported_minorversion)
1162                 goto out;
1163
1164         status = nfs41_check_op_ordering(args);
1165         if (status) {
1166                 op = &args->ops[0];
1167                 op->status = status;
1168                 goto encode_op;
1169         }
1170
1171         while (!status && resp->opcnt < args->opcnt) {
1172                 op = &args->ops[resp->opcnt++];
1173
1174                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1175                         resp->opcnt, args->opcnt, op->opnum,
1176                         nfsd4_op_name(op->opnum));
1177                 /*
1178                  * The XDR decode routines may have pre-set op->status;
1179                  * for example, if there is a miscellaneous XDR error
1180                  * it will be set to nfserr_bad_xdr.
1181                  */
1182                 if (op->status)
1183                         goto encode_op;
1184
1185                 /* We must be able to encode a successful response to
1186                  * this operation, with enough room left over to encode a
1187                  * failed response to the next operation.  If we don't
1188                  * have enough room, fail with ERR_RESOURCE.
1189                  */
1190                 slack_bytes = (char *)resp->end - (char *)resp->p;
1191                 if (slack_bytes < COMPOUND_SLACK_SPACE
1192                                 + COMPOUND_ERR_SLACK_SPACE) {
1193                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1194                         op->status = nfserr_resource;
1195                         goto encode_op;
1196                 }
1197
1198                 opdesc = OPDESC(op);
1199
1200                 if (!cstate->current_fh.fh_dentry) {
1201                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1202                                 op->status = nfserr_nofilehandle;
1203                                 goto encode_op;
1204                         }
1205                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1206                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1207                         op->status = nfserr_moved;
1208                         goto encode_op;
1209                 }
1210
1211                 /* If op is non-idempotent */
1212                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1213                         plen = opdesc->op_rsize_bop(rqstp, op);
1214                         op->status = nfsd4_check_resp_size(resp, plen);
1215                 }
1216
1217                 if (op->status)
1218                         goto encode_op;
1219
1220                 if (opdesc->op_func)
1221                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1222                 else
1223                         BUG_ON(op->status == nfs_ok);
1224
1225                 if (!op->status && need_wrongsec_check(rqstp))
1226                         op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1227
1228 encode_op:
1229                 /* Only from SEQUENCE */
1230                 if (resp->cstate.status == nfserr_replay_cache) {
1231                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1232                         status = op->status;
1233                         goto out;
1234                 }
1235                 if (op->status == nfserr_replay_me) {
1236                         op->replay = &cstate->replay_owner->so_replay;
1237                         nfsd4_encode_replay(resp, op);
1238                         status = op->status = op->replay->rp_status;
1239                 } else {
1240                         nfsd4_encode_operation(resp, op);
1241                         status = op->status;
1242                 }
1243
1244                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1245                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1246                         be32_to_cpu(status));
1247
1248                 if (cstate->replay_owner) {
1249                         nfs4_unlock_state();
1250                         cstate->replay_owner = NULL;
1251                 }
1252                 /* XXX Ugh, we need to get rid of this kind of special case: */
1253                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1254                         fput(op->u.read.rd_filp);
1255
1256                 nfsd4_increment_op_stats(op->opnum);
1257         }
1258
1259         resp->cstate.status = status;
1260         fh_put(&resp->cstate.current_fh);
1261         fh_put(&resp->cstate.save_fh);
1262         BUG_ON(resp->cstate.replay_owner);
1263 out:
1264         /* Reset deferral mechanism for RPC deferrals */
1265         rqstp->rq_usedeferral = 1;
1266         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1267         return status;
1268 }
1269
1270 #define op_encode_hdr_size              (2)
1271 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1272 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1273 #define op_encode_change_info_maxsz     (5)
1274 #define nfs4_fattr_bitmap_maxsz         (4)
1275
1276 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1277 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1278
1279 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1280
1281 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1282 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1283                                          op_encode_ace_maxsz)
1284
1285 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1286
1287 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1288 {
1289         return (op_encode_hdr_size) * sizeof(__be32);
1290 }
1291
1292 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1293 {
1294         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1295 }
1296
1297 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1298 {
1299         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1300 }
1301
1302 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1303 {
1304         return (op_encode_hdr_size + op_encode_change_info_maxsz
1305                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1306 }
1307
1308 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1309 {
1310         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1311                 * sizeof(__be32);
1312 }
1313
1314 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1315 {
1316         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1317                 * sizeof(__be32);
1318 }
1319
1320 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1321 {
1322         return (op_encode_hdr_size + op_encode_stateid_maxsz
1323                 + op_encode_change_info_maxsz + 1
1324                 + nfs4_fattr_bitmap_maxsz
1325                 + op_encode_delegation_maxsz) * sizeof(__be32);
1326 }
1327
1328 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1329 {
1330         u32 maxcount = 0, rlen = 0;
1331
1332         maxcount = svc_max_payload(rqstp);
1333         rlen = op->u.read.rd_length;
1334
1335         if (rlen > maxcount)
1336                 rlen = maxcount;
1337
1338         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1339 }
1340
1341 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1342 {
1343         u32 rlen = op->u.readdir.rd_maxcount;
1344
1345         if (rlen > PAGE_SIZE)
1346                 rlen = PAGE_SIZE;
1347
1348         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1349                  * sizeof(__be32) + rlen;
1350 }
1351
1352 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1353 {
1354         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1355                 * sizeof(__be32);
1356 }
1357
1358 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1359 {
1360         return (op_encode_hdr_size + op_encode_change_info_maxsz
1361                 + op_encode_change_info_maxsz) * sizeof(__be32);
1362 }
1363
1364 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1365 {
1366         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1367 }
1368
1369 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1370 {
1371         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1372 }
1373
1374 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1375 {
1376         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1377 }
1378
1379 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1380 {
1381         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1382                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1383                 2 + /*eir_server_owner.so_minor_id */\
1384                 /* eir_server_owner.so_major_id<> */\
1385                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1386                 /* eir_server_scope<> */\
1387                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1388                 1 + /* eir_server_impl_id array length */\
1389                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1390 }
1391
1392 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1393 {
1394         return (op_encode_hdr_size + \
1395                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1396                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1397 }
1398
1399 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1400 {
1401         return (op_encode_hdr_size + \
1402                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1403                 2 + /* csr_sequence, csr_flags */\
1404                 op_encode_channel_attrs_maxsz + \
1405                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1406 }
1407
1408 static struct nfsd4_operation nfsd4_ops[] = {
1409         [OP_ACCESS] = {
1410                 .op_func = (nfsd4op_func)nfsd4_access,
1411                 .op_name = "OP_ACCESS",
1412         },
1413         [OP_CLOSE] = {
1414                 .op_func = (nfsd4op_func)nfsd4_close,
1415                 .op_flags = OP_MODIFIES_SOMETHING,
1416                 .op_name = "OP_CLOSE",
1417                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1418         },
1419         [OP_COMMIT] = {
1420                 .op_func = (nfsd4op_func)nfsd4_commit,
1421                 .op_flags = OP_MODIFIES_SOMETHING,
1422                 .op_name = "OP_COMMIT",
1423                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1424         },
1425         [OP_CREATE] = {
1426                 .op_func = (nfsd4op_func)nfsd4_create,
1427                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1428                 .op_name = "OP_CREATE",
1429                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1430         },
1431         [OP_DELEGRETURN] = {
1432                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1433                 .op_flags = OP_MODIFIES_SOMETHING,
1434                 .op_name = "OP_DELEGRETURN",
1435                 .op_rsize_bop = nfsd4_only_status_rsize,
1436         },
1437         [OP_GETATTR] = {
1438                 .op_func = (nfsd4op_func)nfsd4_getattr,
1439                 .op_flags = ALLOWED_ON_ABSENT_FS,
1440                 .op_name = "OP_GETATTR",
1441         },
1442         [OP_GETFH] = {
1443                 .op_func = (nfsd4op_func)nfsd4_getfh,
1444                 .op_name = "OP_GETFH",
1445         },
1446         [OP_LINK] = {
1447                 .op_func = (nfsd4op_func)nfsd4_link,
1448                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1449                                 | OP_CACHEME,
1450                 .op_name = "OP_LINK",
1451                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1452         },
1453         [OP_LOCK] = {
1454                 .op_func = (nfsd4op_func)nfsd4_lock,
1455                 .op_flags = OP_MODIFIES_SOMETHING,
1456                 .op_name = "OP_LOCK",
1457                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1458         },
1459         [OP_LOCKT] = {
1460                 .op_func = (nfsd4op_func)nfsd4_lockt,
1461                 .op_name = "OP_LOCKT",
1462         },
1463         [OP_LOCKU] = {
1464                 .op_func = (nfsd4op_func)nfsd4_locku,
1465                 .op_flags = OP_MODIFIES_SOMETHING,
1466                 .op_name = "OP_LOCKU",
1467                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1468         },
1469         [OP_LOOKUP] = {
1470                 .op_func = (nfsd4op_func)nfsd4_lookup,
1471                 .op_flags = OP_HANDLES_WRONGSEC,
1472                 .op_name = "OP_LOOKUP",
1473         },
1474         [OP_LOOKUPP] = {
1475                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1476                 .op_flags = OP_HANDLES_WRONGSEC,
1477                 .op_name = "OP_LOOKUPP",
1478         },
1479         [OP_NVERIFY] = {
1480                 .op_func = (nfsd4op_func)nfsd4_nverify,
1481                 .op_name = "OP_NVERIFY",
1482         },
1483         [OP_OPEN] = {
1484                 .op_func = (nfsd4op_func)nfsd4_open,
1485                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1486                 .op_name = "OP_OPEN",
1487                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1488         },
1489         [OP_OPEN_CONFIRM] = {
1490                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1491                 .op_flags = OP_MODIFIES_SOMETHING,
1492                 .op_name = "OP_OPEN_CONFIRM",
1493                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1494         },
1495         [OP_OPEN_DOWNGRADE] = {
1496                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1497                 .op_flags = OP_MODIFIES_SOMETHING,
1498                 .op_name = "OP_OPEN_DOWNGRADE",
1499                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1500         },
1501         [OP_PUTFH] = {
1502                 .op_func = (nfsd4op_func)nfsd4_putfh,
1503                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1504                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1505                 .op_name = "OP_PUTFH",
1506                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1507         },
1508         [OP_PUTPUBFH] = {
1509                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1510                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1511                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1512                 .op_name = "OP_PUTPUBFH",
1513                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1514         },
1515         [OP_PUTROOTFH] = {
1516                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1517                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1518                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1519                 .op_name = "OP_PUTROOTFH",
1520                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1521         },
1522         [OP_READ] = {
1523                 .op_func = (nfsd4op_func)nfsd4_read,
1524                 .op_flags = OP_MODIFIES_SOMETHING,
1525                 .op_name = "OP_READ",
1526                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1527         },
1528         [OP_READDIR] = {
1529                 .op_func = (nfsd4op_func)nfsd4_readdir,
1530                 .op_flags = OP_MODIFIES_SOMETHING,
1531                 .op_name = "OP_READDIR",
1532                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1533         },
1534         [OP_READLINK] = {
1535                 .op_func = (nfsd4op_func)nfsd4_readlink,
1536                 .op_name = "OP_READLINK",
1537         },
1538         [OP_REMOVE] = {
1539                 .op_func = (nfsd4op_func)nfsd4_remove,
1540                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1541                 .op_name = "OP_REMOVE",
1542                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1543         },
1544         [OP_RENAME] = {
1545                 .op_func = (nfsd4op_func)nfsd4_rename,
1546                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1547                 .op_name = "OP_RENAME",
1548                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1549         },
1550         [OP_RENEW] = {
1551                 .op_func = (nfsd4op_func)nfsd4_renew,
1552                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1553                                 | OP_MODIFIES_SOMETHING,
1554                 .op_name = "OP_RENEW",
1555                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1556
1557         },
1558         [OP_RESTOREFH] = {
1559                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1560                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1561                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1562                 .op_name = "OP_RESTOREFH",
1563                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1564         },
1565         [OP_SAVEFH] = {
1566                 .op_func = (nfsd4op_func)nfsd4_savefh,
1567                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1568                 .op_name = "OP_SAVEFH",
1569                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1570         },
1571         [OP_SECINFO] = {
1572                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1573                 .op_flags = OP_HANDLES_WRONGSEC,
1574                 .op_name = "OP_SECINFO",
1575         },
1576         [OP_SETATTR] = {
1577                 .op_func = (nfsd4op_func)nfsd4_setattr,
1578                 .op_name = "OP_SETATTR",
1579                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1580                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1581         },
1582         [OP_SETCLIENTID] = {
1583                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1584                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1585                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1586                 .op_name = "OP_SETCLIENTID",
1587                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1588         },
1589         [OP_SETCLIENTID_CONFIRM] = {
1590                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1591                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1592                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1593                 .op_name = "OP_SETCLIENTID_CONFIRM",
1594                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1595         },
1596         [OP_VERIFY] = {
1597                 .op_func = (nfsd4op_func)nfsd4_verify,
1598                 .op_name = "OP_VERIFY",
1599         },
1600         [OP_WRITE] = {
1601                 .op_func = (nfsd4op_func)nfsd4_write,
1602                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1603                 .op_name = "OP_WRITE",
1604                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1605         },
1606         [OP_RELEASE_LOCKOWNER] = {
1607                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1608                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1609                                 | OP_MODIFIES_SOMETHING,
1610                 .op_name = "OP_RELEASE_LOCKOWNER",
1611                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1612         },
1613
1614         /* NFSv4.1 operations */
1615         [OP_EXCHANGE_ID] = {
1616                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1617                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1618                                 | OP_MODIFIES_SOMETHING,
1619                 .op_name = "OP_EXCHANGE_ID",
1620                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1621         },
1622         [OP_BIND_CONN_TO_SESSION] = {
1623                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1624                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1625                                 | OP_MODIFIES_SOMETHING,
1626                 .op_name = "OP_BIND_CONN_TO_SESSION",
1627                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1628         },
1629         [OP_CREATE_SESSION] = {
1630                 .op_func = (nfsd4op_func)nfsd4_create_session,
1631                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1632                                 | OP_MODIFIES_SOMETHING,
1633                 .op_name = "OP_CREATE_SESSION",
1634                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1635         },
1636         [OP_DESTROY_SESSION] = {
1637                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1638                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1639                                 | OP_MODIFIES_SOMETHING,
1640                 .op_name = "OP_DESTROY_SESSION",
1641                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1642         },
1643         [OP_SEQUENCE] = {
1644                 .op_func = (nfsd4op_func)nfsd4_sequence,
1645                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1646                 .op_name = "OP_SEQUENCE",
1647         },
1648         [OP_DESTROY_CLIENTID] = {
1649                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1650                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1651                                 | OP_MODIFIES_SOMETHING,
1652                 .op_name = "OP_DESTROY_CLIENTID",
1653                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1654         },
1655         [OP_RECLAIM_COMPLETE] = {
1656                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1657                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1658                 .op_name = "OP_RECLAIM_COMPLETE",
1659                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1660         },
1661         [OP_SECINFO_NO_NAME] = {
1662                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1663                 .op_flags = OP_HANDLES_WRONGSEC,
1664                 .op_name = "OP_SECINFO_NO_NAME",
1665         },
1666         [OP_TEST_STATEID] = {
1667                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1668                 .op_flags = ALLOWED_WITHOUT_FH,
1669                 .op_name = "OP_TEST_STATEID",
1670         },
1671         [OP_FREE_STATEID] = {
1672                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1673                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1674                 .op_name = "OP_FREE_STATEID",
1675                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1676         },
1677 };
1678
1679 static const char *nfsd4_op_name(unsigned opnum)
1680 {
1681         if (opnum < ARRAY_SIZE(nfsd4_ops))
1682                 return nfsd4_ops[opnum].op_name;
1683         return "unknown_operation";
1684 }
1685
1686 #define nfsd4_voidres                   nfsd4_voidargs
1687 struct nfsd4_voidargs { int dummy; };
1688
1689 static struct svc_procedure             nfsd_procedures4[2] = {
1690         [NFSPROC4_NULL] = {
1691                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1692                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1693                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1694                 .pc_ressize = sizeof(struct nfsd4_voidres),
1695                 .pc_cachetype = RC_NOCACHE,
1696                 .pc_xdrressize = 1,
1697         },
1698         [NFSPROC4_COMPOUND] = {
1699                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1700                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1701                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1702                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1703                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1704                 .pc_release = nfsd4_release_compoundargs,
1705                 .pc_cachetype = RC_NOCACHE,
1706                 .pc_xdrressize = NFSD_BUFSIZE/4,
1707         },
1708 };
1709
1710 struct svc_version      nfsd_version4 = {
1711                 .vs_vers        = 4,
1712                 .vs_nproc       = 2,
1713                 .vs_proc        = nfsd_procedures4,
1714                 .vs_dispatch    = nfsd_dispatch,
1715                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1716 };
1717
1718 /*
1719  * Local variables:
1720  *  c-basic-offset: 8
1721  * End:
1722  */