nfsd41: split out share_access want and signal flags while decoding
[linux-2.6.git] / fs / nfsd / nfs4proc.c
1 /*
2  *  Server-side procedures for NFSv4.
3  *
4  *  Copyright (c) 2002 The Regents of the University of Michigan.
5  *  All rights reserved.
6  *
7  *  Kendrick Smith <kmsmith@umich.edu>
8  *  Andy Adamson   <andros@umich.edu>
9  *
10  *  Redistribution and use in source and binary forms, with or without
11  *  modification, are permitted provided that the following conditions
12  *  are met:
13  *
14  *  1. Redistributions of source code must retain the above copyright
15  *     notice, this list of conditions and the following disclaimer.
16  *  2. Redistributions in binary form must reproduce the above copyright
17  *     notice, this list of conditions and the following disclaimer in the
18  *     documentation and/or other materials provided with the distribution.
19  *  3. Neither the name of the University nor the names of its
20  *     contributors may be used to endorse or promote products derived
21  *     from this software without specific prior written permission.
22  *
23  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42 #include "current_stateid.h"
43
44 #define NFSDDBG_FACILITY                NFSDDBG_PROC
45
46 static u32 nfsd_attrmask[] = {
47         NFSD_WRITEABLE_ATTRS_WORD0,
48         NFSD_WRITEABLE_ATTRS_WORD1,
49         NFSD_WRITEABLE_ATTRS_WORD2
50 };
51
52 static u32 nfsd41_ex_attrmask[] = {
53         NFSD_SUPPATTR_EXCLCREAT_WORD0,
54         NFSD_SUPPATTR_EXCLCREAT_WORD1,
55         NFSD_SUPPATTR_EXCLCREAT_WORD2
56 };
57
58 static __be32
59 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
60                    u32 *bmval, u32 *writable)
61 {
62         struct dentry *dentry = cstate->current_fh.fh_dentry;
63
64         /*
65          * Check about attributes are supported by the NFSv4 server or not.
66          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
67          */
68         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
69             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
70             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
71                 return nfserr_attrnotsupp;
72
73         /*
74          * Check FATTR4_WORD0_ACL can be supported
75          * in current environment or not.
76          */
77         if (bmval[0] & FATTR4_WORD0_ACL) {
78                 if (!IS_POSIXACL(dentry->d_inode))
79                         return nfserr_attrnotsupp;
80         }
81
82         /*
83          * According to spec, read-only attributes return ERR_INVAL.
84          */
85         if (writable) {
86                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
87                     (bmval[2] & ~writable[2]))
88                         return nfserr_inval;
89         }
90
91         return nfs_ok;
92 }
93
94 static __be32
95 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
96         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
97 {
98         __be32 status = nfs_ok;
99
100         if (open->op_create == NFS4_OPEN_CREATE) {
101                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
102                     || open->op_createmode == NFS4_CREATE_GUARDED)
103                         status = check_attr_support(rqstp, cstate,
104                                         open->op_bmval, nfsd_attrmask);
105                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
106                         status = check_attr_support(rqstp, cstate,
107                                         open->op_bmval, nfsd41_ex_attrmask);
108         }
109
110         return status;
111 }
112
113 static int
114 is_create_with_attrs(struct nfsd4_open *open)
115 {
116         return open->op_create == NFS4_OPEN_CREATE
117                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
118                     || open->op_createmode == NFS4_CREATE_GUARDED
119                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
120 }
121
122 /*
123  * if error occurs when setting the acl, just clear the acl bit
124  * in the returned attr bitmap.
125  */
126 static void
127 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
128                 struct nfs4_acl *acl, u32 *bmval)
129 {
130         __be32 status;
131
132         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
133         if (status)
134                 /*
135                  * We should probably fail the whole open at this point,
136                  * but we've already created the file, so it's too late;
137                  * So this seems the least of evils:
138                  */
139                 bmval[0] &= ~FATTR4_WORD0_ACL;
140 }
141
142 static inline void
143 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
144 {
145         fh_put(dst);
146         dget(src->fh_dentry);
147         if (src->fh_export)
148                 cache_get(&src->fh_export->h);
149         *dst = *src;
150 }
151
152 static __be32
153 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
154 {
155         __be32 status;
156
157         if (open->op_truncate &&
158                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
159                 return nfserr_inval;
160
161         accmode |= NFSD_MAY_READ_IF_EXEC;
162
163         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
164                 accmode |= NFSD_MAY_READ;
165         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
166                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
167         if (open->op_share_deny & NFS4_SHARE_DENY_READ)
168                 accmode |= NFSD_MAY_WRITE;
169
170         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
171
172         return status;
173 }
174
175 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
176 {
177         umode_t mode = fh->fh_dentry->d_inode->i_mode;
178
179         if (S_ISREG(mode))
180                 return nfs_ok;
181         if (S_ISDIR(mode))
182                 return nfserr_isdir;
183         /*
184          * Using err_symlink as our catch-all case may look odd; but
185          * there's no other obvious error for this case in 4.0, and we
186          * happen to know that it will cause the linux v4 client to do
187          * the right thing on attempts to open something other than a
188          * regular file.
189          */
190         return nfserr_symlink;
191 }
192
193 static __be32
194 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
195 {
196         struct svc_fh resfh;
197         __be32 status;
198
199         fh_init(&resfh, NFS4_FHSIZE);
200         open->op_truncate = 0;
201
202         if (open->op_create) {
203                 /* FIXME: check session persistence and pnfs flags.
204                  * The nfsv4.1 spec requires the following semantics:
205                  *
206                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
207                  * Reply Cache  | server |                 |
208                  * -------------+--------+-----------------+--------------------
209                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
210                  *              |        |                 | (SHOULD)
211                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
212                  *              |        |                 | (SHOULD NOT)
213                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
214                  * yes          | no     | GUARDED4        | GUARDED4
215                  * yes          | yes    | GUARDED4        | GUARDED4
216                  */
217
218                 /*
219                  * Note: create modes (UNCHECKED,GUARDED...) are the same
220                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
221                  */
222                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
223                                         open->op_fname.len, &open->op_iattr,
224                                         &resfh, open->op_createmode,
225                                         (u32 *)open->op_verf.data,
226                                         &open->op_truncate, &open->op_created);
227
228                 /*
229                  * Following rfc 3530 14.2.16, use the returned bitmask
230                  * to indicate which attributes we used to store the
231                  * verifier:
232                  */
233                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
234                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
235                                                 FATTR4_WORD1_TIME_MODIFY);
236         } else {
237                 status = nfsd_lookup(rqstp, current_fh,
238                                      open->op_fname.data, open->op_fname.len, &resfh);
239                 fh_unlock(current_fh);
240                 if (status)
241                         goto out;
242                 status = nfsd_check_obj_isreg(&resfh);
243         }
244         if (status)
245                 goto out;
246
247         if (is_create_with_attrs(open) && open->op_acl != NULL)
248                 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
249
250         set_change_info(&open->op_cinfo, current_fh);
251         fh_dup2(current_fh, &resfh);
252
253         /* set reply cache */
254         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
255                         &resfh.fh_handle);
256         if (!open->op_created)
257                 status = do_open_permission(rqstp, current_fh, open,
258                                             NFSD_MAY_NOP);
259
260 out:
261         fh_put(&resfh);
262         return status;
263 }
264
265 static __be32
266 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
267 {
268         __be32 status;
269
270         /* We don't know the target directory, and therefore can not
271         * set the change info
272         */
273
274         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
275
276         /* set replay cache */
277         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
278                         &current_fh->fh_handle);
279
280         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
281                 (open->op_iattr.ia_size == 0);
282
283         status = do_open_permission(rqstp, current_fh, open,
284                                     NFSD_MAY_OWNER_OVERRIDE);
285
286         return status;
287 }
288
289 static void
290 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
291 {
292         struct nfsd4_sessionid *sid =
293                         (struct nfsd4_sessionid *)session->se_sessionid.data;
294
295         clid->cl_boot = sid->clientid.cl_boot;
296         clid->cl_id = sid->clientid.cl_id;
297 }
298
299 static __be32
300 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
301            struct nfsd4_open *open)
302 {
303         __be32 status;
304         struct nfsd4_compoundres *resp;
305
306         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
307                 (int)open->op_fname.len, open->op_fname.data,
308                 open->op_openowner);
309
310         /* This check required by spec. */
311         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
312                 return nfserr_inval;
313
314         open->op_created = 0;
315         /*
316          * RFC5661 18.51.3
317          * Before RECLAIM_COMPLETE done, server should deny new lock
318          */
319         if (nfsd4_has_session(cstate) &&
320             !cstate->session->se_client->cl_firststate &&
321             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
322                 return nfserr_grace;
323
324         if (nfsd4_has_session(cstate))
325                 copy_clientid(&open->op_clientid, cstate->session);
326
327         nfs4_lock_state();
328
329         /* check seqid for replay. set nfs4_owner */
330         resp = rqstp->rq_resp;
331         status = nfsd4_process_open1(&resp->cstate, open);
332         if (status == nfserr_replay_me) {
333                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
334                 fh_put(&cstate->current_fh);
335                 fh_copy_shallow(&cstate->current_fh.fh_handle,
336                                 &rp->rp_openfh);
337                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
338                 if (status)
339                         dprintk("nfsd4_open: replay failed"
340                                 " restoring previous filehandle\n");
341                 else
342                         status = nfserr_replay_me;
343         }
344         if (status)
345                 goto out;
346
347         status = nfsd4_check_open_attributes(rqstp, cstate, open);
348         if (status)
349                 goto out;
350
351         /* Openowner is now set, so sequence id will get bumped.  Now we need
352          * these checks before we do any creates: */
353         status = nfserr_grace;
354         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
355                 goto out;
356         status = nfserr_no_grace;
357         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
358                 goto out;
359
360         switch (open->op_claim_type) {
361                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
362                 case NFS4_OPEN_CLAIM_NULL:
363                         status = do_open_lookup(rqstp, &cstate->current_fh,
364                                                 open);
365                         if (status)
366                                 goto out;
367                         break;
368                 case NFS4_OPEN_CLAIM_PREVIOUS:
369                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
370                         status = nfs4_check_open_reclaim(&open->op_clientid);
371                         if (status)
372                                 goto out;
373                 case NFS4_OPEN_CLAIM_FH:
374                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
375                         status = do_open_fhandle(rqstp, &cstate->current_fh,
376                                                  open);
377                         if (status)
378                                 goto out;
379                         break;
380                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
381                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
382                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
383                         dprintk("NFSD: unsupported OPEN claim type %d\n",
384                                 open->op_claim_type);
385                         status = nfserr_notsupp;
386                         goto out;
387                 default:
388                         dprintk("NFSD: Invalid OPEN claim type %d\n",
389                                 open->op_claim_type);
390                         status = nfserr_inval;
391                         goto out;
392         }
393         /*
394          * nfsd4_process_open2() does the actual opening of the file.  If
395          * successful, it (1) truncates the file if open->op_truncate was
396          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
397          */
398         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
399         WARN_ON(status && open->op_created);
400 out:
401         nfsd4_cleanup_open_state(open, status);
402         if (open->op_openowner)
403                 cstate->replay_owner = &open->op_openowner->oo_owner;
404         else
405                 nfs4_unlock_state();
406         return status;
407 }
408
409 /*
410  * filehandle-manipulating ops.
411  */
412 static __be32
413 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
414             struct svc_fh **getfh)
415 {
416         if (!cstate->current_fh.fh_dentry)
417                 return nfserr_nofilehandle;
418
419         *getfh = &cstate->current_fh;
420         return nfs_ok;
421 }
422
423 static __be32
424 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
425             struct nfsd4_putfh *putfh)
426 {
427         fh_put(&cstate->current_fh);
428         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
429         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
430                putfh->pf_fhlen);
431         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
432 }
433
434 static __be32
435 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
436                 void *arg)
437 {
438         __be32 status;
439
440         fh_put(&cstate->current_fh);
441         status = exp_pseudoroot(rqstp, &cstate->current_fh);
442         return status;
443 }
444
445 static __be32
446 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
447                 void *arg)
448 {
449         if (!cstate->save_fh.fh_dentry)
450                 return nfserr_restorefh;
451
452         fh_dup2(&cstate->current_fh, &cstate->save_fh);
453         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
454                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
455                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
456         }
457         return nfs_ok;
458 }
459
460 static __be32
461 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
462              void *arg)
463 {
464         if (!cstate->current_fh.fh_dentry)
465                 return nfserr_nofilehandle;
466
467         fh_dup2(&cstate->save_fh, &cstate->current_fh);
468         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
469                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
470                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
471         }
472         return nfs_ok;
473 }
474
475 /*
476  * misc nfsv4 ops
477  */
478 static __be32
479 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
480              struct nfsd4_access *access)
481 {
482         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
483                 return nfserr_inval;
484
485         access->ac_resp_access = access->ac_req_access;
486         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
487                            &access->ac_supported);
488 }
489
490 static __be32
491 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
492              struct nfsd4_commit *commit)
493 {
494         u32 *p = (u32 *)commit->co_verf.data;
495         *p++ = nfssvc_boot.tv_sec;
496         *p++ = nfssvc_boot.tv_usec;
497
498         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
499                              commit->co_count);
500 }
501
502 static __be32
503 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504              struct nfsd4_create *create)
505 {
506         struct svc_fh resfh;
507         __be32 status;
508         dev_t rdev;
509
510         fh_init(&resfh, NFS4_FHSIZE);
511
512         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
513                            NFSD_MAY_CREATE);
514         if (status)
515                 return status;
516
517         status = check_attr_support(rqstp, cstate, create->cr_bmval,
518                                     nfsd_attrmask);
519         if (status)
520                 return status;
521
522         switch (create->cr_type) {
523         case NF4LNK:
524                 /* ugh! we have to null-terminate the linktext, or
525                  * vfs_symlink() will choke.  it is always safe to
526                  * null-terminate by brute force, since at worst we
527                  * will overwrite the first byte of the create namelen
528                  * in the XDR buffer, which has already been extracted
529                  * during XDR decode.
530                  */
531                 create->cr_linkname[create->cr_linklen] = 0;
532
533                 status = nfsd_symlink(rqstp, &cstate->current_fh,
534                                       create->cr_name, create->cr_namelen,
535                                       create->cr_linkname, create->cr_linklen,
536                                       &resfh, &create->cr_iattr);
537                 break;
538
539         case NF4BLK:
540                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
541                 if (MAJOR(rdev) != create->cr_specdata1 ||
542                     MINOR(rdev) != create->cr_specdata2)
543                         return nfserr_inval;
544                 status = nfsd_create(rqstp, &cstate->current_fh,
545                                      create->cr_name, create->cr_namelen,
546                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
547                 break;
548
549         case NF4CHR:
550                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
551                 if (MAJOR(rdev) != create->cr_specdata1 ||
552                     MINOR(rdev) != create->cr_specdata2)
553                         return nfserr_inval;
554                 status = nfsd_create(rqstp, &cstate->current_fh,
555                                      create->cr_name, create->cr_namelen,
556                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
557                 break;
558
559         case NF4SOCK:
560                 status = nfsd_create(rqstp, &cstate->current_fh,
561                                      create->cr_name, create->cr_namelen,
562                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
563                 break;
564
565         case NF4FIFO:
566                 status = nfsd_create(rqstp, &cstate->current_fh,
567                                      create->cr_name, create->cr_namelen,
568                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
569                 break;
570
571         case NF4DIR:
572                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
573                 status = nfsd_create(rqstp, &cstate->current_fh,
574                                      create->cr_name, create->cr_namelen,
575                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
576                 break;
577
578         default:
579                 status = nfserr_badtype;
580         }
581
582         if (status)
583                 goto out;
584
585         if (create->cr_acl != NULL)
586                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
587                                 create->cr_bmval);
588
589         fh_unlock(&cstate->current_fh);
590         set_change_info(&create->cr_cinfo, &cstate->current_fh);
591         fh_dup2(&cstate->current_fh, &resfh);
592 out:
593         fh_put(&resfh);
594         return status;
595 }
596
597 static __be32
598 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
599               struct nfsd4_getattr *getattr)
600 {
601         __be32 status;
602
603         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
604         if (status)
605                 return status;
606
607         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
608                 return nfserr_inval;
609
610         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
611         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
612         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
613
614         getattr->ga_fhp = &cstate->current_fh;
615         return nfs_ok;
616 }
617
618 static __be32
619 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
620            struct nfsd4_link *link)
621 {
622         __be32 status = nfserr_nofilehandle;
623
624         if (!cstate->save_fh.fh_dentry)
625                 return status;
626         status = nfsd_link(rqstp, &cstate->current_fh,
627                            link->li_name, link->li_namelen, &cstate->save_fh);
628         if (!status)
629                 set_change_info(&link->li_cinfo, &cstate->current_fh);
630         return status;
631 }
632
633 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
634 {
635         struct svc_fh tmp_fh;
636         __be32 ret;
637
638         fh_init(&tmp_fh, NFS4_FHSIZE);
639         ret = exp_pseudoroot(rqstp, &tmp_fh);
640         if (ret)
641                 return ret;
642         if (tmp_fh.fh_dentry == fh->fh_dentry) {
643                 fh_put(&tmp_fh);
644                 return nfserr_noent;
645         }
646         fh_put(&tmp_fh);
647         return nfsd_lookup(rqstp, fh, "..", 2, fh);
648 }
649
650 static __be32
651 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
652               void *arg)
653 {
654         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
655 }
656
657 static __be32
658 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
659              struct nfsd4_lookup *lookup)
660 {
661         return nfsd_lookup(rqstp, &cstate->current_fh,
662                            lookup->lo_name, lookup->lo_len,
663                            &cstate->current_fh);
664 }
665
666 static __be32
667 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
668            struct nfsd4_read *read)
669 {
670         __be32 status;
671
672         /* no need to check permission - this will be done in nfsd_read() */
673
674         read->rd_filp = NULL;
675         if (read->rd_offset >= OFFSET_MAX)
676                 return nfserr_inval;
677
678         nfs4_lock_state();
679         /* check stateid */
680         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
681                                                  RD_STATE, &read->rd_filp))) {
682                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
683                 goto out;
684         }
685         if (read->rd_filp)
686                 get_file(read->rd_filp);
687         status = nfs_ok;
688 out:
689         nfs4_unlock_state();
690         read->rd_rqstp = rqstp;
691         read->rd_fhp = &cstate->current_fh;
692         return status;
693 }
694
695 static __be32
696 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
697               struct nfsd4_readdir *readdir)
698 {
699         u64 cookie = readdir->rd_cookie;
700         static const nfs4_verifier zeroverf;
701
702         /* no need to check permission - this will be done in nfsd_readdir() */
703
704         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
705                 return nfserr_inval;
706
707         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
708         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
709         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
710
711         if ((cookie == 1) || (cookie == 2) ||
712             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
713                 return nfserr_bad_cookie;
714
715         readdir->rd_rqstp = rqstp;
716         readdir->rd_fhp = &cstate->current_fh;
717         return nfs_ok;
718 }
719
720 static __be32
721 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
722                struct nfsd4_readlink *readlink)
723 {
724         readlink->rl_rqstp = rqstp;
725         readlink->rl_fhp = &cstate->current_fh;
726         return nfs_ok;
727 }
728
729 static __be32
730 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
731              struct nfsd4_remove *remove)
732 {
733         __be32 status;
734
735         if (locks_in_grace())
736                 return nfserr_grace;
737         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
738                              remove->rm_name, remove->rm_namelen);
739         if (!status) {
740                 fh_unlock(&cstate->current_fh);
741                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
742         }
743         return status;
744 }
745
746 static __be32
747 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
748              struct nfsd4_rename *rename)
749 {
750         __be32 status = nfserr_nofilehandle;
751
752         if (!cstate->save_fh.fh_dentry)
753                 return status;
754         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
755                                         & NFSEXP_NOSUBTREECHECK))
756                 return nfserr_grace;
757         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
758                              rename->rn_snamelen, &cstate->current_fh,
759                              rename->rn_tname, rename->rn_tnamelen);
760
761         /* the underlying filesystem returns different error's than required
762          * by NFSv4. both save_fh and current_fh have been verified.. */
763         if (status == nfserr_isdir)
764                 status = nfserr_exist;
765         else if ((status == nfserr_notdir) &&
766                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
767                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
768                 status = nfserr_exist;
769
770         if (!status) {
771                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
772                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
773         }
774         return status;
775 }
776
777 static __be32
778 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
779               struct nfsd4_secinfo *secinfo)
780 {
781         struct svc_fh resfh;
782         struct svc_export *exp;
783         struct dentry *dentry;
784         __be32 err;
785
786         fh_init(&resfh, NFS4_FHSIZE);
787         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
788         if (err)
789                 return err;
790         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
791                                     secinfo->si_name, secinfo->si_namelen,
792                                     &exp, &dentry);
793         if (err)
794                 return err;
795         if (dentry->d_inode == NULL) {
796                 exp_put(exp);
797                 err = nfserr_noent;
798         } else
799                 secinfo->si_exp = exp;
800         dput(dentry);
801         if (cstate->minorversion)
802                 /* See rfc 5661 section 2.6.3.1.1.8 */
803                 fh_put(&cstate->current_fh);
804         return err;
805 }
806
807 static __be32
808 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
809               struct nfsd4_secinfo_no_name *sin)
810 {
811         __be32 err;
812
813         switch (sin->sin_style) {
814         case NFS4_SECINFO_STYLE4_CURRENT_FH:
815                 break;
816         case NFS4_SECINFO_STYLE4_PARENT:
817                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
818                 if (err)
819                         return err;
820                 break;
821         default:
822                 return nfserr_inval;
823         }
824         exp_get(cstate->current_fh.fh_export);
825         sin->sin_exp = cstate->current_fh.fh_export;
826         fh_put(&cstate->current_fh);
827         return nfs_ok;
828 }
829
830 static __be32
831 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
832               struct nfsd4_setattr *setattr)
833 {
834         __be32 status = nfs_ok;
835
836         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
837                 nfs4_lock_state();
838                 status = nfs4_preprocess_stateid_op(cstate,
839                         &setattr->sa_stateid, WR_STATE, NULL);
840                 nfs4_unlock_state();
841                 if (status) {
842                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
843                         return status;
844                 }
845         }
846         status = fh_want_write(&cstate->current_fh);
847         if (status)
848                 return status;
849         status = nfs_ok;
850
851         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
852                                     nfsd_attrmask);
853         if (status)
854                 goto out;
855
856         if (setattr->sa_acl != NULL)
857                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
858                                             setattr->sa_acl);
859         if (status)
860                 goto out;
861         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
862                                 0, (time_t)0);
863 out:
864         fh_drop_write(&cstate->current_fh);
865         return status;
866 }
867
868 static __be32
869 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
870             struct nfsd4_write *write)
871 {
872         stateid_t *stateid = &write->wr_stateid;
873         struct file *filp = NULL;
874         u32 *p;
875         __be32 status = nfs_ok;
876         unsigned long cnt;
877
878         /* no need to check permission - this will be done in nfsd_write() */
879
880         if (write->wr_offset >= OFFSET_MAX)
881                 return nfserr_inval;
882
883         nfs4_lock_state();
884         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
885         if (filp)
886                 get_file(filp);
887         nfs4_unlock_state();
888
889         if (status) {
890                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
891                 return status;
892         }
893
894         cnt = write->wr_buflen;
895         write->wr_how_written = write->wr_stable_how;
896         p = (u32 *)write->wr_verifier.data;
897         *p++ = nfssvc_boot.tv_sec;
898         *p++ = nfssvc_boot.tv_usec;
899
900         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
901                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
902                              &cnt, &write->wr_how_written);
903         if (filp)
904                 fput(filp);
905
906         write->wr_bytes_written = cnt;
907
908         return status;
909 }
910
911 /* This routine never returns NFS_OK!  If there are no other errors, it
912  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
913  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
914  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
915  */
916 static __be32
917 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
918              struct nfsd4_verify *verify)
919 {
920         __be32 *buf, *p;
921         int count;
922         __be32 status;
923
924         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
925         if (status)
926                 return status;
927
928         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
929         if (status)
930                 return status;
931
932         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
933             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
934                 return nfserr_inval;
935         if (verify->ve_attrlen & 3)
936                 return nfserr_inval;
937
938         /* count in words:
939          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
940          */
941         count = 4 + (verify->ve_attrlen >> 2);
942         buf = kmalloc(count << 2, GFP_KERNEL);
943         if (!buf)
944                 return nfserr_jukebox;
945
946         status = nfsd4_encode_fattr(&cstate->current_fh,
947                                     cstate->current_fh.fh_export,
948                                     cstate->current_fh.fh_dentry, buf,
949                                     &count, verify->ve_bmval,
950                                     rqstp, 0);
951
952         /* this means that nfsd4_encode_fattr() ran out of space */
953         if (status == nfserr_resource && count == 0)
954                 status = nfserr_not_same;
955         if (status)
956                 goto out_kfree;
957
958         /* skip bitmap */
959         p = buf + 1 + ntohl(buf[0]);
960         status = nfserr_not_same;
961         if (ntohl(*p++) != verify->ve_attrlen)
962                 goto out_kfree;
963         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
964                 status = nfserr_same;
965
966 out_kfree:
967         kfree(buf);
968         return status;
969 }
970
971 static __be32
972 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
973               struct nfsd4_verify *verify)
974 {
975         __be32 status;
976
977         status = _nfsd4_verify(rqstp, cstate, verify);
978         return status == nfserr_not_same ? nfs_ok : status;
979 }
980
981 static __be32
982 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
983              struct nfsd4_verify *verify)
984 {
985         __be32 status;
986
987         status = _nfsd4_verify(rqstp, cstate, verify);
988         return status == nfserr_same ? nfs_ok : status;
989 }
990
991 /*
992  * NULL call.
993  */
994 static __be32
995 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
996 {
997         return nfs_ok;
998 }
999
1000 static inline void nfsd4_increment_op_stats(u32 opnum)
1001 {
1002         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1003                 nfsdstats.nfs4_opcount[opnum]++;
1004 }
1005
1006 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1007                               void *);
1008 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1009 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1010 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1011
1012 enum nfsd4_op_flags {
1013         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1014         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1015         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1016         /* For rfc 5661 section 2.6.3.1.1: */
1017         OP_HANDLES_WRONGSEC = 1 << 3,
1018         OP_IS_PUTFH_LIKE = 1 << 4,
1019         /*
1020          * These are the ops whose result size we estimate before
1021          * encoding, to avoid performing an op then not being able to
1022          * respond or cache a response.  This includes writes and setattrs
1023          * as well as the operations usually called "nonidempotent":
1024          */
1025         OP_MODIFIES_SOMETHING = 1 << 5,
1026         /*
1027          * Cache compounds containing these ops in the xid-based drc:
1028          * We use the DRC for compounds containing non-idempotent
1029          * operations, *except* those that are 4.1-specific (since
1030          * sessions provide their own EOS), and except for stateful
1031          * operations other than setclientid and setclientid_confirm
1032          * (since sequence numbers provide EOS for open, lock, etc in
1033          * the v4.0 case).
1034          */
1035         OP_CACHEME = 1 << 6,
1036         /*
1037          * These are ops which clear current state id.
1038          */
1039         OP_CLEAR_STATEID = 1 << 7,
1040 };
1041
1042 struct nfsd4_operation {
1043         nfsd4op_func op_func;
1044         u32 op_flags;
1045         char *op_name;
1046         /* Try to get response size before operation */
1047         nfsd4op_rsize op_rsize_bop;
1048         stateid_setter op_get_currentstateid;
1049         stateid_getter op_set_currentstateid;
1050 };
1051
1052 static struct nfsd4_operation nfsd4_ops[];
1053
1054 static const char *nfsd4_op_name(unsigned opnum);
1055
1056 /*
1057  * Enforce NFSv4.1 COMPOUND ordering rules:
1058  *
1059  * Also note, enforced elsewhere:
1060  *      - SEQUENCE other than as first op results in
1061  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1062  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1063  *        (Enforced in nfsd4_bind_conn_to_session().)
1064  *      - DESTROY_SESSION must be the final operation in a compound, if
1065  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1066  *        (Enforced in nfsd4_destroy_session().)
1067  */
1068 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1069 {
1070         struct nfsd4_op *op = &args->ops[0];
1071
1072         /* These ordering requirements don't apply to NFSv4.0: */
1073         if (args->minorversion == 0)
1074                 return nfs_ok;
1075         /* This is weird, but OK, not our problem: */
1076         if (args->opcnt == 0)
1077                 return nfs_ok;
1078         if (op->status == nfserr_op_illegal)
1079                 return nfs_ok;
1080         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1081                 return nfserr_op_not_in_session;
1082         if (op->opnum == OP_SEQUENCE)
1083                 return nfs_ok;
1084         if (args->opcnt != 1)
1085                 return nfserr_not_only_op;
1086         return nfs_ok;
1087 }
1088
1089 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1090 {
1091         return &nfsd4_ops[op->opnum];
1092 }
1093
1094 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1095 {
1096         return OPDESC(op)->op_flags & OP_CACHEME;
1097 }
1098
1099 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1100 {
1101         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1102         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1103         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1104         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1105         struct nfsd4_operation *thisd;
1106         struct nfsd4_operation *nextd;
1107
1108         thisd = OPDESC(this);
1109         /*
1110          * Most ops check wronsec on our own; only the putfh-like ops
1111          * have special rules.
1112          */
1113         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1114                 return false;
1115         /*
1116          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1117          * put-filehandle operation if we're not going to use the
1118          * result:
1119          */
1120         if (argp->opcnt == resp->opcnt)
1121                 return false;
1122
1123         nextd = OPDESC(next);
1124         /*
1125          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1126          * errors themselves as necessary; others should check for them
1127          * now:
1128          */
1129         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1130 }
1131
1132 /*
1133  * COMPOUND call.
1134  */
1135 static __be32
1136 nfsd4_proc_compound(struct svc_rqst *rqstp,
1137                     struct nfsd4_compoundargs *args,
1138                     struct nfsd4_compoundres *resp)
1139 {
1140         struct nfsd4_op *op;
1141         struct nfsd4_operation *opdesc;
1142         struct nfsd4_compound_state *cstate = &resp->cstate;
1143         int             slack_bytes;
1144         u32             plen = 0;
1145         __be32          status;
1146
1147         resp->xbuf = &rqstp->rq_res;
1148         resp->p = rqstp->rq_res.head[0].iov_base +
1149                                                 rqstp->rq_res.head[0].iov_len;
1150         resp->tagp = resp->p;
1151         /* reserve space for: taglen, tag, and opcnt */
1152         resp->p += 2 + XDR_QUADLEN(args->taglen);
1153         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1154         resp->taglen = args->taglen;
1155         resp->tag = args->tag;
1156         resp->opcnt = 0;
1157         resp->rqstp = rqstp;
1158         resp->cstate.minorversion = args->minorversion;
1159         resp->cstate.replay_owner = NULL;
1160         resp->cstate.session = NULL;
1161         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1162         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1163         /*
1164          * Don't use the deferral mechanism for NFSv4; compounds make it
1165          * too hard to avoid non-idempotency problems.
1166          */
1167         rqstp->rq_usedeferral = 0;
1168
1169         /*
1170          * According to RFC3010, this takes precedence over all other errors.
1171          */
1172         status = nfserr_minor_vers_mismatch;
1173         if (args->minorversion > nfsd_supported_minorversion)
1174                 goto out;
1175
1176         status = nfs41_check_op_ordering(args);
1177         if (status) {
1178                 op = &args->ops[0];
1179                 op->status = status;
1180                 goto encode_op;
1181         }
1182
1183         while (!status && resp->opcnt < args->opcnt) {
1184                 op = &args->ops[resp->opcnt++];
1185
1186                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1187                         resp->opcnt, args->opcnt, op->opnum,
1188                         nfsd4_op_name(op->opnum));
1189                 /*
1190                  * The XDR decode routines may have pre-set op->status;
1191                  * for example, if there is a miscellaneous XDR error
1192                  * it will be set to nfserr_bad_xdr.
1193                  */
1194                 if (op->status)
1195                         goto encode_op;
1196
1197                 /* We must be able to encode a successful response to
1198                  * this operation, with enough room left over to encode a
1199                  * failed response to the next operation.  If we don't
1200                  * have enough room, fail with ERR_RESOURCE.
1201                  */
1202                 slack_bytes = (char *)resp->end - (char *)resp->p;
1203                 if (slack_bytes < COMPOUND_SLACK_SPACE
1204                                 + COMPOUND_ERR_SLACK_SPACE) {
1205                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1206                         op->status = nfserr_resource;
1207                         goto encode_op;
1208                 }
1209
1210                 opdesc = OPDESC(op);
1211
1212                 if (!cstate->current_fh.fh_dentry) {
1213                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1214                                 op->status = nfserr_nofilehandle;
1215                                 goto encode_op;
1216                         }
1217                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1218                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1219                         op->status = nfserr_moved;
1220                         goto encode_op;
1221                 }
1222
1223                 /* If op is non-idempotent */
1224                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1225                         plen = opdesc->op_rsize_bop(rqstp, op);
1226                         op->status = nfsd4_check_resp_size(resp, plen);
1227                 }
1228
1229                 if (op->status)
1230                         goto encode_op;
1231
1232                 if (opdesc->op_func) {
1233                         if (opdesc->op_get_currentstateid)
1234                                 opdesc->op_get_currentstateid(cstate, &op->u);
1235                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1236                 } else
1237                         BUG_ON(op->status == nfs_ok);
1238
1239                 if (!op->status) {
1240                         if (opdesc->op_set_currentstateid)
1241                                 opdesc->op_set_currentstateid(cstate, &op->u);
1242
1243                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1244                                 clear_current_stateid(cstate);
1245
1246                         if (need_wrongsec_check(rqstp))
1247                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1248                 }
1249
1250 encode_op:
1251                 /* Only from SEQUENCE */
1252                 if (resp->cstate.status == nfserr_replay_cache) {
1253                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1254                         status = op->status;
1255                         goto out;
1256                 }
1257                 if (op->status == nfserr_replay_me) {
1258                         op->replay = &cstate->replay_owner->so_replay;
1259                         nfsd4_encode_replay(resp, op);
1260                         status = op->status = op->replay->rp_status;
1261                 } else {
1262                         nfsd4_encode_operation(resp, op);
1263                         status = op->status;
1264                 }
1265
1266                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1267                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1268                         be32_to_cpu(status));
1269
1270                 if (cstate->replay_owner) {
1271                         nfs4_unlock_state();
1272                         cstate->replay_owner = NULL;
1273                 }
1274                 /* XXX Ugh, we need to get rid of this kind of special case: */
1275                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1276                         fput(op->u.read.rd_filp);
1277
1278                 nfsd4_increment_op_stats(op->opnum);
1279         }
1280
1281         resp->cstate.status = status;
1282         fh_put(&resp->cstate.current_fh);
1283         fh_put(&resp->cstate.save_fh);
1284         BUG_ON(resp->cstate.replay_owner);
1285 out:
1286         /* Reset deferral mechanism for RPC deferrals */
1287         rqstp->rq_usedeferral = 1;
1288         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1289         return status;
1290 }
1291
1292 #define op_encode_hdr_size              (2)
1293 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1294 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1295 #define op_encode_change_info_maxsz     (5)
1296 #define nfs4_fattr_bitmap_maxsz         (4)
1297
1298 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1299 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1300
1301 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1302
1303 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1304 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1305                                          op_encode_ace_maxsz)
1306
1307 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1308
1309 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1310 {
1311         return (op_encode_hdr_size) * sizeof(__be32);
1312 }
1313
1314 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1315 {
1316         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1317 }
1318
1319 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1320 {
1321         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1322 }
1323
1324 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1325 {
1326         return (op_encode_hdr_size + op_encode_change_info_maxsz
1327                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1328 }
1329
1330 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1331 {
1332         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1333                 * sizeof(__be32);
1334 }
1335
1336 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1337 {
1338         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1339                 * sizeof(__be32);
1340 }
1341
1342 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1343 {
1344         return (op_encode_hdr_size + op_encode_stateid_maxsz
1345                 + op_encode_change_info_maxsz + 1
1346                 + nfs4_fattr_bitmap_maxsz
1347                 + op_encode_delegation_maxsz) * sizeof(__be32);
1348 }
1349
1350 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1351 {
1352         u32 maxcount = 0, rlen = 0;
1353
1354         maxcount = svc_max_payload(rqstp);
1355         rlen = op->u.read.rd_length;
1356
1357         if (rlen > maxcount)
1358                 rlen = maxcount;
1359
1360         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1361 }
1362
1363 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1364 {
1365         u32 rlen = op->u.readdir.rd_maxcount;
1366
1367         if (rlen > PAGE_SIZE)
1368                 rlen = PAGE_SIZE;
1369
1370         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1371                  * sizeof(__be32) + rlen;
1372 }
1373
1374 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1375 {
1376         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1377                 * sizeof(__be32);
1378 }
1379
1380 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1381 {
1382         return (op_encode_hdr_size + op_encode_change_info_maxsz
1383                 + op_encode_change_info_maxsz) * sizeof(__be32);
1384 }
1385
1386 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1387 {
1388         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1389 }
1390
1391 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1392 {
1393         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1394 }
1395
1396 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1397 {
1398         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1399 }
1400
1401 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1402 {
1403         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1404                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1405                 2 + /*eir_server_owner.so_minor_id */\
1406                 /* eir_server_owner.so_major_id<> */\
1407                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1408                 /* eir_server_scope<> */\
1409                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1410                 1 + /* eir_server_impl_id array length */\
1411                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1412 }
1413
1414 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1415 {
1416         return (op_encode_hdr_size + \
1417                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1418                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1419 }
1420
1421 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1422 {
1423         return (op_encode_hdr_size + \
1424                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1425                 2 + /* csr_sequence, csr_flags */\
1426                 op_encode_channel_attrs_maxsz + \
1427                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1428 }
1429
1430 static struct nfsd4_operation nfsd4_ops[] = {
1431         [OP_ACCESS] = {
1432                 .op_func = (nfsd4op_func)nfsd4_access,
1433                 .op_name = "OP_ACCESS",
1434         },
1435         [OP_CLOSE] = {
1436                 .op_func = (nfsd4op_func)nfsd4_close,
1437                 .op_flags = OP_MODIFIES_SOMETHING,
1438                 .op_name = "OP_CLOSE",
1439                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1440                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1441                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1442         },
1443         [OP_COMMIT] = {
1444                 .op_func = (nfsd4op_func)nfsd4_commit,
1445                 .op_flags = OP_MODIFIES_SOMETHING,
1446                 .op_name = "OP_COMMIT",
1447                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1448         },
1449         [OP_CREATE] = {
1450                 .op_func = (nfsd4op_func)nfsd4_create,
1451                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1452                 .op_name = "OP_CREATE",
1453                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1454         },
1455         [OP_DELEGRETURN] = {
1456                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1457                 .op_flags = OP_MODIFIES_SOMETHING,
1458                 .op_name = "OP_DELEGRETURN",
1459                 .op_rsize_bop = nfsd4_only_status_rsize,
1460                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1461         },
1462         [OP_GETATTR] = {
1463                 .op_func = (nfsd4op_func)nfsd4_getattr,
1464                 .op_flags = ALLOWED_ON_ABSENT_FS,
1465                 .op_name = "OP_GETATTR",
1466         },
1467         [OP_GETFH] = {
1468                 .op_func = (nfsd4op_func)nfsd4_getfh,
1469                 .op_name = "OP_GETFH",
1470         },
1471         [OP_LINK] = {
1472                 .op_func = (nfsd4op_func)nfsd4_link,
1473                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1474                                 | OP_CACHEME,
1475                 .op_name = "OP_LINK",
1476                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1477         },
1478         [OP_LOCK] = {
1479                 .op_func = (nfsd4op_func)nfsd4_lock,
1480                 .op_flags = OP_MODIFIES_SOMETHING,
1481                 .op_name = "OP_LOCK",
1482                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1483                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1484         },
1485         [OP_LOCKT] = {
1486                 .op_func = (nfsd4op_func)nfsd4_lockt,
1487                 .op_name = "OP_LOCKT",
1488         },
1489         [OP_LOCKU] = {
1490                 .op_func = (nfsd4op_func)nfsd4_locku,
1491                 .op_flags = OP_MODIFIES_SOMETHING,
1492                 .op_name = "OP_LOCKU",
1493                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1494                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1495         },
1496         [OP_LOOKUP] = {
1497                 .op_func = (nfsd4op_func)nfsd4_lookup,
1498                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1499                 .op_name = "OP_LOOKUP",
1500         },
1501         [OP_LOOKUPP] = {
1502                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1503                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1504                 .op_name = "OP_LOOKUPP",
1505         },
1506         [OP_NVERIFY] = {
1507                 .op_func = (nfsd4op_func)nfsd4_nverify,
1508                 .op_name = "OP_NVERIFY",
1509         },
1510         [OP_OPEN] = {
1511                 .op_func = (nfsd4op_func)nfsd4_open,
1512                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1513                 .op_name = "OP_OPEN",
1514                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1515                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1516         },
1517         [OP_OPEN_CONFIRM] = {
1518                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1519                 .op_flags = OP_MODIFIES_SOMETHING,
1520                 .op_name = "OP_OPEN_CONFIRM",
1521                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1522         },
1523         [OP_OPEN_DOWNGRADE] = {
1524                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1525                 .op_flags = OP_MODIFIES_SOMETHING,
1526                 .op_name = "OP_OPEN_DOWNGRADE",
1527                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1528                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1529                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1530         },
1531         [OP_PUTFH] = {
1532                 .op_func = (nfsd4op_func)nfsd4_putfh,
1533                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1534                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1535                                 | OP_CLEAR_STATEID,
1536                 .op_name = "OP_PUTFH",
1537                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1538         },
1539         [OP_PUTPUBFH] = {
1540                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1541                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1542                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1543                                 | OP_CLEAR_STATEID,
1544                 .op_name = "OP_PUTPUBFH",
1545                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1546         },
1547         [OP_PUTROOTFH] = {
1548                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1549                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1550                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1551                                 | OP_CLEAR_STATEID,
1552                 .op_name = "OP_PUTROOTFH",
1553                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1554         },
1555         [OP_READ] = {
1556                 .op_func = (nfsd4op_func)nfsd4_read,
1557                 .op_flags = OP_MODIFIES_SOMETHING,
1558                 .op_name = "OP_READ",
1559                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1560                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1561         },
1562         [OP_READDIR] = {
1563                 .op_func = (nfsd4op_func)nfsd4_readdir,
1564                 .op_flags = OP_MODIFIES_SOMETHING,
1565                 .op_name = "OP_READDIR",
1566                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1567         },
1568         [OP_READLINK] = {
1569                 .op_func = (nfsd4op_func)nfsd4_readlink,
1570                 .op_name = "OP_READLINK",
1571         },
1572         [OP_REMOVE] = {
1573                 .op_func = (nfsd4op_func)nfsd4_remove,
1574                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1575                 .op_name = "OP_REMOVE",
1576                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1577         },
1578         [OP_RENAME] = {
1579                 .op_func = (nfsd4op_func)nfsd4_rename,
1580                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1581                 .op_name = "OP_RENAME",
1582                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1583         },
1584         [OP_RENEW] = {
1585                 .op_func = (nfsd4op_func)nfsd4_renew,
1586                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1587                                 | OP_MODIFIES_SOMETHING,
1588                 .op_name = "OP_RENEW",
1589                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1590
1591         },
1592         [OP_RESTOREFH] = {
1593                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1594                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1595                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1596                 .op_name = "OP_RESTOREFH",
1597                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1598         },
1599         [OP_SAVEFH] = {
1600                 .op_func = (nfsd4op_func)nfsd4_savefh,
1601                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1602                 .op_name = "OP_SAVEFH",
1603                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1604         },
1605         [OP_SECINFO] = {
1606                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1607                 .op_flags = OP_HANDLES_WRONGSEC,
1608                 .op_name = "OP_SECINFO",
1609         },
1610         [OP_SETATTR] = {
1611                 .op_func = (nfsd4op_func)nfsd4_setattr,
1612                 .op_name = "OP_SETATTR",
1613                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1614                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1615                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1616         },
1617         [OP_SETCLIENTID] = {
1618                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1619                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1620                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1621                 .op_name = "OP_SETCLIENTID",
1622                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1623         },
1624         [OP_SETCLIENTID_CONFIRM] = {
1625                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1626                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1627                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1628                 .op_name = "OP_SETCLIENTID_CONFIRM",
1629                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1630         },
1631         [OP_VERIFY] = {
1632                 .op_func = (nfsd4op_func)nfsd4_verify,
1633                 .op_name = "OP_VERIFY",
1634         },
1635         [OP_WRITE] = {
1636                 .op_func = (nfsd4op_func)nfsd4_write,
1637                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1638                 .op_name = "OP_WRITE",
1639                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1640                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1641         },
1642         [OP_RELEASE_LOCKOWNER] = {
1643                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1644                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1645                                 | OP_MODIFIES_SOMETHING,
1646                 .op_name = "OP_RELEASE_LOCKOWNER",
1647                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1648         },
1649
1650         /* NFSv4.1 operations */
1651         [OP_EXCHANGE_ID] = {
1652                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1653                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1654                                 | OP_MODIFIES_SOMETHING,
1655                 .op_name = "OP_EXCHANGE_ID",
1656                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1657         },
1658         [OP_BIND_CONN_TO_SESSION] = {
1659                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1660                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1661                                 | OP_MODIFIES_SOMETHING,
1662                 .op_name = "OP_BIND_CONN_TO_SESSION",
1663                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1664         },
1665         [OP_CREATE_SESSION] = {
1666                 .op_func = (nfsd4op_func)nfsd4_create_session,
1667                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1668                                 | OP_MODIFIES_SOMETHING,
1669                 .op_name = "OP_CREATE_SESSION",
1670                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1671         },
1672         [OP_DESTROY_SESSION] = {
1673                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1674                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1675                                 | OP_MODIFIES_SOMETHING,
1676                 .op_name = "OP_DESTROY_SESSION",
1677                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1678         },
1679         [OP_SEQUENCE] = {
1680                 .op_func = (nfsd4op_func)nfsd4_sequence,
1681                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1682                 .op_name = "OP_SEQUENCE",
1683         },
1684         [OP_DESTROY_CLIENTID] = {
1685                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1686                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1687                                 | OP_MODIFIES_SOMETHING,
1688                 .op_name = "OP_DESTROY_CLIENTID",
1689                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1690         },
1691         [OP_RECLAIM_COMPLETE] = {
1692                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1693                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1694                 .op_name = "OP_RECLAIM_COMPLETE",
1695                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1696         },
1697         [OP_SECINFO_NO_NAME] = {
1698                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1699                 .op_flags = OP_HANDLES_WRONGSEC,
1700                 .op_name = "OP_SECINFO_NO_NAME",
1701         },
1702         [OP_TEST_STATEID] = {
1703                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1704                 .op_flags = ALLOWED_WITHOUT_FH,
1705                 .op_name = "OP_TEST_STATEID",
1706         },
1707         [OP_FREE_STATEID] = {
1708                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1709                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1710                 .op_name = "OP_FREE_STATEID",
1711                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1712         },
1713 };
1714
1715 static const char *nfsd4_op_name(unsigned opnum)
1716 {
1717         if (opnum < ARRAY_SIZE(nfsd4_ops))
1718                 return nfsd4_ops[opnum].op_name;
1719         return "unknown_operation";
1720 }
1721
1722 #define nfsd4_voidres                   nfsd4_voidargs
1723 struct nfsd4_voidargs { int dummy; };
1724
1725 static struct svc_procedure             nfsd_procedures4[2] = {
1726         [NFSPROC4_NULL] = {
1727                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1728                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1729                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1730                 .pc_ressize = sizeof(struct nfsd4_voidres),
1731                 .pc_cachetype = RC_NOCACHE,
1732                 .pc_xdrressize = 1,
1733         },
1734         [NFSPROC4_COMPOUND] = {
1735                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1736                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1737                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1738                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1739                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1740                 .pc_release = nfsd4_release_compoundargs,
1741                 .pc_cachetype = RC_NOCACHE,
1742                 .pc_xdrressize = NFSD_BUFSIZE/4,
1743         },
1744 };
1745
1746 struct svc_version      nfsd_version4 = {
1747                 .vs_vers        = 4,
1748                 .vs_nproc       = 2,
1749                 .vs_proc        = nfsd_procedures4,
1750                 .vs_dispatch    = nfsd_dispatch,
1751                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1752 };
1753
1754 /*
1755  * Local variables:
1756  *  c-basic-offset: 8
1757  * End:
1758  */