Merge branch 'for-3.4' of git://linux-nfs.org/~bfields/linux
[~shefty/rdma-dev.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         resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
200         if (!resfh)
201                 return nfserr_jukebox;
202         fh_init(resfh, NFS4_FHSIZE);
203         open->op_truncate = 0;
204
205         if (open->op_create) {
206                 /* FIXME: check session persistence and pnfs flags.
207                  * The nfsv4.1 spec requires the following semantics:
208                  *
209                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
210                  * Reply Cache  | server |                 |
211                  * -------------+--------+-----------------+--------------------
212                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
213                  *              |        |                 | (SHOULD)
214                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
215                  *              |        |                 | (SHOULD NOT)
216                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
217                  * yes          | no     | GUARDED4        | GUARDED4
218                  * yes          | yes    | GUARDED4        | GUARDED4
219                  */
220
221                 /*
222                  * Note: create modes (UNCHECKED,GUARDED...) are the same
223                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
224                  */
225                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
226                                         open->op_fname.len, &open->op_iattr,
227                                         resfh, open->op_createmode,
228                                         (u32 *)open->op_verf.data,
229                                         &open->op_truncate, &open->op_created);
230
231                 /*
232                  * Following rfc 3530 14.2.16, use the returned bitmask
233                  * to indicate which attributes we used to store the
234                  * verifier:
235                  */
236                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
237                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
238                                                         FATTR4_WORD1_TIME_MODIFY);
239         } else {
240                 status = nfsd_lookup(rqstp, current_fh,
241                                      open->op_fname.data, open->op_fname.len, resfh);
242                 fh_unlock(current_fh);
243         }
244         if (status)
245                 goto out;
246         status = nfsd_check_obj_isreg(resfh);
247         if (status)
248                 goto out;
249
250         if (is_create_with_attrs(open) && open->op_acl != NULL)
251                 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
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, resfh, open,
258                                             NFSD_MAY_NOP);
259         set_change_info(&open->op_cinfo, current_fh);
260         fh_dup2(current_fh, resfh);
261 out:
262         fh_put(resfh);
263         kfree(resfh);
264         return status;
265 }
266
267 static __be32
268 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
269 {
270         __be32 status;
271
272         /* We don't know the target directory, and therefore can not
273         * set the change info
274         */
275
276         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
277
278         /* set replay cache */
279         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
280                         &current_fh->fh_handle);
281
282         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
283                 (open->op_iattr.ia_size == 0);
284
285         status = do_open_permission(rqstp, current_fh, open,
286                                     NFSD_MAY_OWNER_OVERRIDE);
287
288         return status;
289 }
290
291 static void
292 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
293 {
294         struct nfsd4_sessionid *sid =
295                         (struct nfsd4_sessionid *)session->se_sessionid.data;
296
297         clid->cl_boot = sid->clientid.cl_boot;
298         clid->cl_id = sid->clientid.cl_id;
299 }
300
301 static __be32
302 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
303            struct nfsd4_open *open)
304 {
305         __be32 status;
306         struct nfsd4_compoundres *resp;
307
308         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
309                 (int)open->op_fname.len, open->op_fname.data,
310                 open->op_openowner);
311
312         /* This check required by spec. */
313         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
314                 return nfserr_inval;
315
316         open->op_created = 0;
317         /*
318          * RFC5661 18.51.3
319          * Before RECLAIM_COMPLETE done, server should deny new lock
320          */
321         if (nfsd4_has_session(cstate) &&
322             !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
323                       &cstate->session->se_client->cl_flags) &&
324             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
325                 return nfserr_grace;
326
327         if (nfsd4_has_session(cstate))
328                 copy_clientid(&open->op_clientid, cstate->session);
329
330         nfs4_lock_state();
331
332         /* check seqid for replay. set nfs4_owner */
333         resp = rqstp->rq_resp;
334         status = nfsd4_process_open1(&resp->cstate, open);
335         if (status == nfserr_replay_me) {
336                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
337                 fh_put(&cstate->current_fh);
338                 fh_copy_shallow(&cstate->current_fh.fh_handle,
339                                 &rp->rp_openfh);
340                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
341                 if (status)
342                         dprintk("nfsd4_open: replay failed"
343                                 " restoring previous filehandle\n");
344                 else
345                         status = nfserr_replay_me;
346         }
347         if (status)
348                 goto out;
349
350         status = nfsd4_check_open_attributes(rqstp, cstate, open);
351         if (status)
352                 goto out;
353
354         /* Openowner is now set, so sequence id will get bumped.  Now we need
355          * these checks before we do any creates: */
356         status = nfserr_grace;
357         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
358                 goto out;
359         status = nfserr_no_grace;
360         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
361                 goto out;
362
363         switch (open->op_claim_type) {
364                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
365                 case NFS4_OPEN_CLAIM_NULL:
366                         status = do_open_lookup(rqstp, &cstate->current_fh,
367                                                 open);
368                         if (status)
369                                 goto out;
370                         break;
371                 case NFS4_OPEN_CLAIM_PREVIOUS:
372                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
373                         status = nfs4_check_open_reclaim(&open->op_clientid);
374                         if (status)
375                                 goto out;
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         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
457                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
458                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
459         }
460         return nfs_ok;
461 }
462
463 static __be32
464 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
465              void *arg)
466 {
467         if (!cstate->current_fh.fh_dentry)
468                 return nfserr_nofilehandle;
469
470         fh_dup2(&cstate->save_fh, &cstate->current_fh);
471         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
472                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
473                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
474         }
475         return nfs_ok;
476 }
477
478 /*
479  * misc nfsv4 ops
480  */
481 static __be32
482 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
483              struct nfsd4_access *access)
484 {
485         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
486                 return nfserr_inval;
487
488         access->ac_resp_access = access->ac_req_access;
489         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
490                            &access->ac_supported);
491 }
492
493 static void gen_boot_verifier(nfs4_verifier *verifier)
494 {
495         __be32 verf[2];
496
497         verf[0] = (__be32)nfssvc_boot.tv_sec;
498         verf[1] = (__be32)nfssvc_boot.tv_usec;
499         memcpy(verifier->data, verf, sizeof(verifier->data));
500 }
501
502 static __be32
503 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504              struct nfsd4_commit *commit)
505 {
506         gen_boot_verifier(&commit->co_verf);
507         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
508                              commit->co_count);
509 }
510
511 static __be32
512 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
513              struct nfsd4_create *create)
514 {
515         struct svc_fh resfh;
516         __be32 status;
517         dev_t rdev;
518
519         fh_init(&resfh, NFS4_FHSIZE);
520
521         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
522                            NFSD_MAY_CREATE);
523         if (status)
524                 return status;
525
526         status = check_attr_support(rqstp, cstate, create->cr_bmval,
527                                     nfsd_attrmask);
528         if (status)
529                 return status;
530
531         switch (create->cr_type) {
532         case NF4LNK:
533                 /* ugh! we have to null-terminate the linktext, or
534                  * vfs_symlink() will choke.  it is always safe to
535                  * null-terminate by brute force, since at worst we
536                  * will overwrite the first byte of the create namelen
537                  * in the XDR buffer, which has already been extracted
538                  * during XDR decode.
539                  */
540                 create->cr_linkname[create->cr_linklen] = 0;
541
542                 status = nfsd_symlink(rqstp, &cstate->current_fh,
543                                       create->cr_name, create->cr_namelen,
544                                       create->cr_linkname, create->cr_linklen,
545                                       &resfh, &create->cr_iattr);
546                 break;
547
548         case NF4BLK:
549                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
550                 if (MAJOR(rdev) != create->cr_specdata1 ||
551                     MINOR(rdev) != create->cr_specdata2)
552                         return nfserr_inval;
553                 status = nfsd_create(rqstp, &cstate->current_fh,
554                                      create->cr_name, create->cr_namelen,
555                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
556                 break;
557
558         case NF4CHR:
559                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
560                 if (MAJOR(rdev) != create->cr_specdata1 ||
561                     MINOR(rdev) != create->cr_specdata2)
562                         return nfserr_inval;
563                 status = nfsd_create(rqstp, &cstate->current_fh,
564                                      create->cr_name, create->cr_namelen,
565                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
566                 break;
567
568         case NF4SOCK:
569                 status = nfsd_create(rqstp, &cstate->current_fh,
570                                      create->cr_name, create->cr_namelen,
571                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
572                 break;
573
574         case NF4FIFO:
575                 status = nfsd_create(rqstp, &cstate->current_fh,
576                                      create->cr_name, create->cr_namelen,
577                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
578                 break;
579
580         case NF4DIR:
581                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
582                 status = nfsd_create(rqstp, &cstate->current_fh,
583                                      create->cr_name, create->cr_namelen,
584                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
585                 break;
586
587         default:
588                 status = nfserr_badtype;
589         }
590
591         if (status)
592                 goto out;
593
594         if (create->cr_acl != NULL)
595                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
596                                 create->cr_bmval);
597
598         fh_unlock(&cstate->current_fh);
599         set_change_info(&create->cr_cinfo, &cstate->current_fh);
600         fh_dup2(&cstate->current_fh, &resfh);
601 out:
602         fh_put(&resfh);
603         return status;
604 }
605
606 static __be32
607 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
608               struct nfsd4_getattr *getattr)
609 {
610         __be32 status;
611
612         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
613         if (status)
614                 return status;
615
616         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
617                 return nfserr_inval;
618
619         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
620         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
621         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
622
623         getattr->ga_fhp = &cstate->current_fh;
624         return nfs_ok;
625 }
626
627 static __be32
628 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
629            struct nfsd4_link *link)
630 {
631         __be32 status = nfserr_nofilehandle;
632
633         if (!cstate->save_fh.fh_dentry)
634                 return status;
635         status = nfsd_link(rqstp, &cstate->current_fh,
636                            link->li_name, link->li_namelen, &cstate->save_fh);
637         if (!status)
638                 set_change_info(&link->li_cinfo, &cstate->current_fh);
639         return status;
640 }
641
642 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
643 {
644         struct svc_fh tmp_fh;
645         __be32 ret;
646
647         fh_init(&tmp_fh, NFS4_FHSIZE);
648         ret = exp_pseudoroot(rqstp, &tmp_fh);
649         if (ret)
650                 return ret;
651         if (tmp_fh.fh_dentry == fh->fh_dentry) {
652                 fh_put(&tmp_fh);
653                 return nfserr_noent;
654         }
655         fh_put(&tmp_fh);
656         return nfsd_lookup(rqstp, fh, "..", 2, fh);
657 }
658
659 static __be32
660 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
661               void *arg)
662 {
663         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
664 }
665
666 static __be32
667 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
668              struct nfsd4_lookup *lookup)
669 {
670         return nfsd_lookup(rqstp, &cstate->current_fh,
671                            lookup->lo_name, lookup->lo_len,
672                            &cstate->current_fh);
673 }
674
675 static __be32
676 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
677            struct nfsd4_read *read)
678 {
679         __be32 status;
680
681         /* no need to check permission - this will be done in nfsd_read() */
682
683         read->rd_filp = NULL;
684         if (read->rd_offset >= OFFSET_MAX)
685                 return nfserr_inval;
686
687         nfs4_lock_state();
688         /* check stateid */
689         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
690                                                  RD_STATE, &read->rd_filp))) {
691                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
692                 goto out;
693         }
694         if (read->rd_filp)
695                 get_file(read->rd_filp);
696         status = nfs_ok;
697 out:
698         nfs4_unlock_state();
699         read->rd_rqstp = rqstp;
700         read->rd_fhp = &cstate->current_fh;
701         return status;
702 }
703
704 static __be32
705 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
706               struct nfsd4_readdir *readdir)
707 {
708         u64 cookie = readdir->rd_cookie;
709         static const nfs4_verifier zeroverf;
710
711         /* no need to check permission - this will be done in nfsd_readdir() */
712
713         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
714                 return nfserr_inval;
715
716         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
717         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
718         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
719
720         if ((cookie == 1) || (cookie == 2) ||
721             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
722                 return nfserr_bad_cookie;
723
724         readdir->rd_rqstp = rqstp;
725         readdir->rd_fhp = &cstate->current_fh;
726         return nfs_ok;
727 }
728
729 static __be32
730 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
731                struct nfsd4_readlink *readlink)
732 {
733         readlink->rl_rqstp = rqstp;
734         readlink->rl_fhp = &cstate->current_fh;
735         return nfs_ok;
736 }
737
738 static __be32
739 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
740              struct nfsd4_remove *remove)
741 {
742         __be32 status;
743
744         if (locks_in_grace())
745                 return nfserr_grace;
746         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
747                              remove->rm_name, remove->rm_namelen);
748         if (!status) {
749                 fh_unlock(&cstate->current_fh);
750                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
751         }
752         return status;
753 }
754
755 static __be32
756 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
757              struct nfsd4_rename *rename)
758 {
759         __be32 status = nfserr_nofilehandle;
760
761         if (!cstate->save_fh.fh_dentry)
762                 return status;
763         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
764                                         & NFSEXP_NOSUBTREECHECK))
765                 return nfserr_grace;
766         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
767                              rename->rn_snamelen, &cstate->current_fh,
768                              rename->rn_tname, rename->rn_tnamelen);
769
770         /* the underlying filesystem returns different error's than required
771          * by NFSv4. both save_fh and current_fh have been verified.. */
772         if (status == nfserr_isdir)
773                 status = nfserr_exist;
774         else if ((status == nfserr_notdir) &&
775                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
776                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
777                 status = nfserr_exist;
778
779         if (!status) {
780                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
781                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
782         }
783         return status;
784 }
785
786 static __be32
787 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
788               struct nfsd4_secinfo *secinfo)
789 {
790         struct svc_fh resfh;
791         struct svc_export *exp;
792         struct dentry *dentry;
793         __be32 err;
794
795         fh_init(&resfh, NFS4_FHSIZE);
796         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
797         if (err)
798                 return err;
799         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
800                                     secinfo->si_name, secinfo->si_namelen,
801                                     &exp, &dentry);
802         if (err)
803                 return err;
804         if (dentry->d_inode == NULL) {
805                 exp_put(exp);
806                 err = nfserr_noent;
807         } else
808                 secinfo->si_exp = exp;
809         dput(dentry);
810         if (cstate->minorversion)
811                 /* See rfc 5661 section 2.6.3.1.1.8 */
812                 fh_put(&cstate->current_fh);
813         return err;
814 }
815
816 static __be32
817 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
818               struct nfsd4_secinfo_no_name *sin)
819 {
820         __be32 err;
821
822         switch (sin->sin_style) {
823         case NFS4_SECINFO_STYLE4_CURRENT_FH:
824                 break;
825         case NFS4_SECINFO_STYLE4_PARENT:
826                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
827                 if (err)
828                         return err;
829                 break;
830         default:
831                 return nfserr_inval;
832         }
833         exp_get(cstate->current_fh.fh_export);
834         sin->sin_exp = cstate->current_fh.fh_export;
835         fh_put(&cstate->current_fh);
836         return nfs_ok;
837 }
838
839 static __be32
840 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
841               struct nfsd4_setattr *setattr)
842 {
843         __be32 status = nfs_ok;
844         int err;
845
846         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
847                 nfs4_lock_state();
848                 status = nfs4_preprocess_stateid_op(cstate,
849                         &setattr->sa_stateid, WR_STATE, NULL);
850                 nfs4_unlock_state();
851                 if (status) {
852                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
853                         return status;
854                 }
855         }
856         err = fh_want_write(&cstate->current_fh);
857         if (err)
858                 return nfserrno(err);
859         status = nfs_ok;
860
861         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
862                                     nfsd_attrmask);
863         if (status)
864                 goto out;
865
866         if (setattr->sa_acl != NULL)
867                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
868                                             setattr->sa_acl);
869         if (status)
870                 goto out;
871         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
872                                 0, (time_t)0);
873 out:
874         fh_drop_write(&cstate->current_fh);
875         return status;
876 }
877
878 static __be32
879 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
880             struct nfsd4_write *write)
881 {
882         stateid_t *stateid = &write->wr_stateid;
883         struct file *filp = NULL;
884         __be32 status = nfs_ok;
885         unsigned long cnt;
886
887         /* no need to check permission - this will be done in nfsd_write() */
888
889         if (write->wr_offset >= OFFSET_MAX)
890                 return nfserr_inval;
891
892         nfs4_lock_state();
893         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
894         if (filp)
895                 get_file(filp);
896         nfs4_unlock_state();
897
898         if (status) {
899                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
900                 return status;
901         }
902
903         cnt = write->wr_buflen;
904         write->wr_how_written = write->wr_stable_how;
905         gen_boot_verifier(&write->wr_verifier);
906
907         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
908                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
909                              &cnt, &write->wr_how_written);
910         if (filp)
911                 fput(filp);
912
913         write->wr_bytes_written = cnt;
914
915         return status;
916 }
917
918 /* This routine never returns NFS_OK!  If there are no other errors, it
919  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
920  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
921  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
922  */
923 static __be32
924 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
925              struct nfsd4_verify *verify)
926 {
927         __be32 *buf, *p;
928         int count;
929         __be32 status;
930
931         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
932         if (status)
933                 return status;
934
935         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
936         if (status)
937                 return status;
938
939         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
940             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
941                 return nfserr_inval;
942         if (verify->ve_attrlen & 3)
943                 return nfserr_inval;
944
945         /* count in words:
946          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
947          */
948         count = 4 + (verify->ve_attrlen >> 2);
949         buf = kmalloc(count << 2, GFP_KERNEL);
950         if (!buf)
951                 return nfserr_jukebox;
952
953         status = nfsd4_encode_fattr(&cstate->current_fh,
954                                     cstate->current_fh.fh_export,
955                                     cstate->current_fh.fh_dentry, buf,
956                                     &count, verify->ve_bmval,
957                                     rqstp, 0);
958
959         /* this means that nfsd4_encode_fattr() ran out of space */
960         if (status == nfserr_resource && count == 0)
961                 status = nfserr_not_same;
962         if (status)
963                 goto out_kfree;
964
965         /* skip bitmap */
966         p = buf + 1 + ntohl(buf[0]);
967         status = nfserr_not_same;
968         if (ntohl(*p++) != verify->ve_attrlen)
969                 goto out_kfree;
970         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
971                 status = nfserr_same;
972
973 out_kfree:
974         kfree(buf);
975         return status;
976 }
977
978 static __be32
979 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
980               struct nfsd4_verify *verify)
981 {
982         __be32 status;
983
984         status = _nfsd4_verify(rqstp, cstate, verify);
985         return status == nfserr_not_same ? nfs_ok : status;
986 }
987
988 static __be32
989 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
990              struct nfsd4_verify *verify)
991 {
992         __be32 status;
993
994         status = _nfsd4_verify(rqstp, cstate, verify);
995         return status == nfserr_same ? nfs_ok : status;
996 }
997
998 /*
999  * NULL call.
1000  */
1001 static __be32
1002 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1003 {
1004         return nfs_ok;
1005 }
1006
1007 static inline void nfsd4_increment_op_stats(u32 opnum)
1008 {
1009         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1010                 nfsdstats.nfs4_opcount[opnum]++;
1011 }
1012
1013 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1014                               void *);
1015 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1016 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1017 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1018
1019 enum nfsd4_op_flags {
1020         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1021         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1022         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1023         /* For rfc 5661 section 2.6.3.1.1: */
1024         OP_HANDLES_WRONGSEC = 1 << 3,
1025         OP_IS_PUTFH_LIKE = 1 << 4,
1026         /*
1027          * These are the ops whose result size we estimate before
1028          * encoding, to avoid performing an op then not being able to
1029          * respond or cache a response.  This includes writes and setattrs
1030          * as well as the operations usually called "nonidempotent":
1031          */
1032         OP_MODIFIES_SOMETHING = 1 << 5,
1033         /*
1034          * Cache compounds containing these ops in the xid-based drc:
1035          * We use the DRC for compounds containing non-idempotent
1036          * operations, *except* those that are 4.1-specific (since
1037          * sessions provide their own EOS), and except for stateful
1038          * operations other than setclientid and setclientid_confirm
1039          * (since sequence numbers provide EOS for open, lock, etc in
1040          * the v4.0 case).
1041          */
1042         OP_CACHEME = 1 << 6,
1043         /*
1044          * These are ops which clear current state id.
1045          */
1046         OP_CLEAR_STATEID = 1 << 7,
1047 };
1048
1049 struct nfsd4_operation {
1050         nfsd4op_func op_func;
1051         u32 op_flags;
1052         char *op_name;
1053         /* Try to get response size before operation */
1054         nfsd4op_rsize op_rsize_bop;
1055         stateid_setter op_get_currentstateid;
1056         stateid_getter op_set_currentstateid;
1057 };
1058
1059 static struct nfsd4_operation nfsd4_ops[];
1060
1061 #ifdef NFSD_DEBUG
1062 static const char *nfsd4_op_name(unsigned opnum);
1063 #endif
1064
1065 /*
1066  * Enforce NFSv4.1 COMPOUND ordering rules:
1067  *
1068  * Also note, enforced elsewhere:
1069  *      - SEQUENCE other than as first op results in
1070  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1071  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1072  *        (Enforced in nfsd4_bind_conn_to_session().)
1073  *      - DESTROY_SESSION must be the final operation in a compound, if
1074  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1075  *        (Enforced in nfsd4_destroy_session().)
1076  */
1077 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1078 {
1079         struct nfsd4_op *op = &args->ops[0];
1080
1081         /* These ordering requirements don't apply to NFSv4.0: */
1082         if (args->minorversion == 0)
1083                 return nfs_ok;
1084         /* This is weird, but OK, not our problem: */
1085         if (args->opcnt == 0)
1086                 return nfs_ok;
1087         if (op->status == nfserr_op_illegal)
1088                 return nfs_ok;
1089         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1090                 return nfserr_op_not_in_session;
1091         if (op->opnum == OP_SEQUENCE)
1092                 return nfs_ok;
1093         if (args->opcnt != 1)
1094                 return nfserr_not_only_op;
1095         return nfs_ok;
1096 }
1097
1098 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1099 {
1100         return &nfsd4_ops[op->opnum];
1101 }
1102
1103 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1104 {
1105         return OPDESC(op)->op_flags & OP_CACHEME;
1106 }
1107
1108 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1109 {
1110         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1111         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1112         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1113         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1114         struct nfsd4_operation *thisd;
1115         struct nfsd4_operation *nextd;
1116
1117         thisd = OPDESC(this);
1118         /*
1119          * Most ops check wronsec on our own; only the putfh-like ops
1120          * have special rules.
1121          */
1122         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1123                 return false;
1124         /*
1125          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1126          * put-filehandle operation if we're not going to use the
1127          * result:
1128          */
1129         if (argp->opcnt == resp->opcnt)
1130                 return false;
1131
1132         nextd = OPDESC(next);
1133         /*
1134          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1135          * errors themselves as necessary; others should check for them
1136          * now:
1137          */
1138         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1139 }
1140
1141 /*
1142  * COMPOUND call.
1143  */
1144 static __be32
1145 nfsd4_proc_compound(struct svc_rqst *rqstp,
1146                     struct nfsd4_compoundargs *args,
1147                     struct nfsd4_compoundres *resp)
1148 {
1149         struct nfsd4_op *op;
1150         struct nfsd4_operation *opdesc;
1151         struct nfsd4_compound_state *cstate = &resp->cstate;
1152         int             slack_bytes;
1153         u32             plen = 0;
1154         __be32          status;
1155
1156         resp->xbuf = &rqstp->rq_res;
1157         resp->p = rqstp->rq_res.head[0].iov_base +
1158                                                 rqstp->rq_res.head[0].iov_len;
1159         resp->tagp = resp->p;
1160         /* reserve space for: taglen, tag, and opcnt */
1161         resp->p += 2 + XDR_QUADLEN(args->taglen);
1162         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1163         resp->taglen = args->taglen;
1164         resp->tag = args->tag;
1165         resp->opcnt = 0;
1166         resp->rqstp = rqstp;
1167         resp->cstate.minorversion = args->minorversion;
1168         resp->cstate.replay_owner = NULL;
1169         resp->cstate.session = NULL;
1170         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1171         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1172         /*
1173          * Don't use the deferral mechanism for NFSv4; compounds make it
1174          * too hard to avoid non-idempotency problems.
1175          */
1176         rqstp->rq_usedeferral = 0;
1177
1178         /*
1179          * According to RFC3010, this takes precedence over all other errors.
1180          */
1181         status = nfserr_minor_vers_mismatch;
1182         if (args->minorversion > nfsd_supported_minorversion)
1183                 goto out;
1184
1185         status = nfs41_check_op_ordering(args);
1186         if (status) {
1187                 op = &args->ops[0];
1188                 op->status = status;
1189                 goto encode_op;
1190         }
1191
1192         while (!status && resp->opcnt < args->opcnt) {
1193                 op = &args->ops[resp->opcnt++];
1194
1195                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1196                         resp->opcnt, args->opcnt, op->opnum,
1197                         nfsd4_op_name(op->opnum));
1198                 /*
1199                  * The XDR decode routines may have pre-set op->status;
1200                  * for example, if there is a miscellaneous XDR error
1201                  * it will be set to nfserr_bad_xdr.
1202                  */
1203                 if (op->status)
1204                         goto encode_op;
1205
1206                 /* We must be able to encode a successful response to
1207                  * this operation, with enough room left over to encode a
1208                  * failed response to the next operation.  If we don't
1209                  * have enough room, fail with ERR_RESOURCE.
1210                  */
1211                 slack_bytes = (char *)resp->end - (char *)resp->p;
1212                 if (slack_bytes < COMPOUND_SLACK_SPACE
1213                                 + COMPOUND_ERR_SLACK_SPACE) {
1214                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1215                         op->status = nfserr_resource;
1216                         goto encode_op;
1217                 }
1218
1219                 opdesc = OPDESC(op);
1220
1221                 if (!cstate->current_fh.fh_dentry) {
1222                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1223                                 op->status = nfserr_nofilehandle;
1224                                 goto encode_op;
1225                         }
1226                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1227                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1228                         op->status = nfserr_moved;
1229                         goto encode_op;
1230                 }
1231
1232                 /* If op is non-idempotent */
1233                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1234                         plen = opdesc->op_rsize_bop(rqstp, op);
1235                         op->status = nfsd4_check_resp_size(resp, plen);
1236                 }
1237
1238                 if (op->status)
1239                         goto encode_op;
1240
1241                 if (opdesc->op_func) {
1242                         if (opdesc->op_get_currentstateid)
1243                                 opdesc->op_get_currentstateid(cstate, &op->u);
1244                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1245                 } else
1246                         BUG_ON(op->status == nfs_ok);
1247
1248                 if (!op->status) {
1249                         if (opdesc->op_set_currentstateid)
1250                                 opdesc->op_set_currentstateid(cstate, &op->u);
1251
1252                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1253                                 clear_current_stateid(cstate);
1254
1255                         if (need_wrongsec_check(rqstp))
1256                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1257                 }
1258
1259 encode_op:
1260                 /* Only from SEQUENCE */
1261                 if (resp->cstate.status == nfserr_replay_cache) {
1262                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1263                         status = op->status;
1264                         goto out;
1265                 }
1266                 if (op->status == nfserr_replay_me) {
1267                         op->replay = &cstate->replay_owner->so_replay;
1268                         nfsd4_encode_replay(resp, op);
1269                         status = op->status = op->replay->rp_status;
1270                 } else {
1271                         nfsd4_encode_operation(resp, op);
1272                         status = op->status;
1273                 }
1274
1275                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1276                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1277                         be32_to_cpu(status));
1278
1279                 if (cstate->replay_owner) {
1280                         nfs4_unlock_state();
1281                         cstate->replay_owner = NULL;
1282                 }
1283                 /* XXX Ugh, we need to get rid of this kind of special case: */
1284                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1285                         fput(op->u.read.rd_filp);
1286
1287                 nfsd4_increment_op_stats(op->opnum);
1288         }
1289
1290         resp->cstate.status = status;
1291         fh_put(&resp->cstate.current_fh);
1292         fh_put(&resp->cstate.save_fh);
1293         BUG_ON(resp->cstate.replay_owner);
1294 out:
1295         /* Reset deferral mechanism for RPC deferrals */
1296         rqstp->rq_usedeferral = 1;
1297         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1298         return status;
1299 }
1300
1301 #define op_encode_hdr_size              (2)
1302 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1303 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1304 #define op_encode_change_info_maxsz     (5)
1305 #define nfs4_fattr_bitmap_maxsz         (4)
1306
1307 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1308 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1309
1310 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1311
1312 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1313 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1314                                          op_encode_ace_maxsz)
1315
1316 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1317
1318 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1319 {
1320         return (op_encode_hdr_size) * sizeof(__be32);
1321 }
1322
1323 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1324 {
1325         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1326 }
1327
1328 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1329 {
1330         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1331 }
1332
1333 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1334 {
1335         return (op_encode_hdr_size + op_encode_change_info_maxsz
1336                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1337 }
1338
1339 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1340 {
1341         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1342                 * sizeof(__be32);
1343 }
1344
1345 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1346 {
1347         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1348                 * sizeof(__be32);
1349 }
1350
1351 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1352 {
1353         return (op_encode_hdr_size + op_encode_stateid_maxsz
1354                 + op_encode_change_info_maxsz + 1
1355                 + nfs4_fattr_bitmap_maxsz
1356                 + op_encode_delegation_maxsz) * sizeof(__be32);
1357 }
1358
1359 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1360 {
1361         u32 maxcount = 0, rlen = 0;
1362
1363         maxcount = svc_max_payload(rqstp);
1364         rlen = op->u.read.rd_length;
1365
1366         if (rlen > maxcount)
1367                 rlen = maxcount;
1368
1369         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1370 }
1371
1372 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1373 {
1374         u32 rlen = op->u.readdir.rd_maxcount;
1375
1376         if (rlen > PAGE_SIZE)
1377                 rlen = PAGE_SIZE;
1378
1379         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1380                  * sizeof(__be32) + rlen;
1381 }
1382
1383 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1384 {
1385         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1386                 * sizeof(__be32);
1387 }
1388
1389 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1390 {
1391         return (op_encode_hdr_size + op_encode_change_info_maxsz
1392                 + op_encode_change_info_maxsz) * sizeof(__be32);
1393 }
1394
1395 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1396 {
1397         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1398 }
1399
1400 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1401 {
1402         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1403 }
1404
1405 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1406 {
1407         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1408 }
1409
1410 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1411 {
1412         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1413                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1414                 2 + /*eir_server_owner.so_minor_id */\
1415                 /* eir_server_owner.so_major_id<> */\
1416                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1417                 /* eir_server_scope<> */\
1418                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1419                 1 + /* eir_server_impl_id array length */\
1420                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1421 }
1422
1423 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1424 {
1425         return (op_encode_hdr_size + \
1426                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1427                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1428 }
1429
1430 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1431 {
1432         return (op_encode_hdr_size + \
1433                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1434                 2 + /* csr_sequence, csr_flags */\
1435                 op_encode_channel_attrs_maxsz + \
1436                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1437 }
1438
1439 static struct nfsd4_operation nfsd4_ops[] = {
1440         [OP_ACCESS] = {
1441                 .op_func = (nfsd4op_func)nfsd4_access,
1442                 .op_name = "OP_ACCESS",
1443         },
1444         [OP_CLOSE] = {
1445                 .op_func = (nfsd4op_func)nfsd4_close,
1446                 .op_flags = OP_MODIFIES_SOMETHING,
1447                 .op_name = "OP_CLOSE",
1448                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1449                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1450                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1451         },
1452         [OP_COMMIT] = {
1453                 .op_func = (nfsd4op_func)nfsd4_commit,
1454                 .op_flags = OP_MODIFIES_SOMETHING,
1455                 .op_name = "OP_COMMIT",
1456                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1457         },
1458         [OP_CREATE] = {
1459                 .op_func = (nfsd4op_func)nfsd4_create,
1460                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1461                 .op_name = "OP_CREATE",
1462                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1463         },
1464         [OP_DELEGRETURN] = {
1465                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1466                 .op_flags = OP_MODIFIES_SOMETHING,
1467                 .op_name = "OP_DELEGRETURN",
1468                 .op_rsize_bop = nfsd4_only_status_rsize,
1469                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1470         },
1471         [OP_GETATTR] = {
1472                 .op_func = (nfsd4op_func)nfsd4_getattr,
1473                 .op_flags = ALLOWED_ON_ABSENT_FS,
1474                 .op_name = "OP_GETATTR",
1475         },
1476         [OP_GETFH] = {
1477                 .op_func = (nfsd4op_func)nfsd4_getfh,
1478                 .op_name = "OP_GETFH",
1479         },
1480         [OP_LINK] = {
1481                 .op_func = (nfsd4op_func)nfsd4_link,
1482                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1483                                 | OP_CACHEME,
1484                 .op_name = "OP_LINK",
1485                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1486         },
1487         [OP_LOCK] = {
1488                 .op_func = (nfsd4op_func)nfsd4_lock,
1489                 .op_flags = OP_MODIFIES_SOMETHING,
1490                 .op_name = "OP_LOCK",
1491                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1492                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1493         },
1494         [OP_LOCKT] = {
1495                 .op_func = (nfsd4op_func)nfsd4_lockt,
1496                 .op_name = "OP_LOCKT",
1497         },
1498         [OP_LOCKU] = {
1499                 .op_func = (nfsd4op_func)nfsd4_locku,
1500                 .op_flags = OP_MODIFIES_SOMETHING,
1501                 .op_name = "OP_LOCKU",
1502                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1503                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1504         },
1505         [OP_LOOKUP] = {
1506                 .op_func = (nfsd4op_func)nfsd4_lookup,
1507                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1508                 .op_name = "OP_LOOKUP",
1509         },
1510         [OP_LOOKUPP] = {
1511                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1512                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1513                 .op_name = "OP_LOOKUPP",
1514         },
1515         [OP_NVERIFY] = {
1516                 .op_func = (nfsd4op_func)nfsd4_nverify,
1517                 .op_name = "OP_NVERIFY",
1518         },
1519         [OP_OPEN] = {
1520                 .op_func = (nfsd4op_func)nfsd4_open,
1521                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1522                 .op_name = "OP_OPEN",
1523                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1524                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1525         },
1526         [OP_OPEN_CONFIRM] = {
1527                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1528                 .op_flags = OP_MODIFIES_SOMETHING,
1529                 .op_name = "OP_OPEN_CONFIRM",
1530                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1531         },
1532         [OP_OPEN_DOWNGRADE] = {
1533                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1534                 .op_flags = OP_MODIFIES_SOMETHING,
1535                 .op_name = "OP_OPEN_DOWNGRADE",
1536                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1537                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1538                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1539         },
1540         [OP_PUTFH] = {
1541                 .op_func = (nfsd4op_func)nfsd4_putfh,
1542                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1543                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1544                                 | OP_CLEAR_STATEID,
1545                 .op_name = "OP_PUTFH",
1546                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1547         },
1548         [OP_PUTPUBFH] = {
1549                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1550                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1551                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1552                                 | OP_CLEAR_STATEID,
1553                 .op_name = "OP_PUTPUBFH",
1554                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1555         },
1556         [OP_PUTROOTFH] = {
1557                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1558                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1559                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1560                                 | OP_CLEAR_STATEID,
1561                 .op_name = "OP_PUTROOTFH",
1562                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1563         },
1564         [OP_READ] = {
1565                 .op_func = (nfsd4op_func)nfsd4_read,
1566                 .op_flags = OP_MODIFIES_SOMETHING,
1567                 .op_name = "OP_READ",
1568                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1569                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1570         },
1571         [OP_READDIR] = {
1572                 .op_func = (nfsd4op_func)nfsd4_readdir,
1573                 .op_flags = OP_MODIFIES_SOMETHING,
1574                 .op_name = "OP_READDIR",
1575                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1576         },
1577         [OP_READLINK] = {
1578                 .op_func = (nfsd4op_func)nfsd4_readlink,
1579                 .op_name = "OP_READLINK",
1580         },
1581         [OP_REMOVE] = {
1582                 .op_func = (nfsd4op_func)nfsd4_remove,
1583                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1584                 .op_name = "OP_REMOVE",
1585                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1586         },
1587         [OP_RENAME] = {
1588                 .op_func = (nfsd4op_func)nfsd4_rename,
1589                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1590                 .op_name = "OP_RENAME",
1591                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1592         },
1593         [OP_RENEW] = {
1594                 .op_func = (nfsd4op_func)nfsd4_renew,
1595                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1596                                 | OP_MODIFIES_SOMETHING,
1597                 .op_name = "OP_RENEW",
1598                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1599
1600         },
1601         [OP_RESTOREFH] = {
1602                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1603                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1604                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1605                 .op_name = "OP_RESTOREFH",
1606                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1607         },
1608         [OP_SAVEFH] = {
1609                 .op_func = (nfsd4op_func)nfsd4_savefh,
1610                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1611                 .op_name = "OP_SAVEFH",
1612                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1613         },
1614         [OP_SECINFO] = {
1615                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1616                 .op_flags = OP_HANDLES_WRONGSEC,
1617                 .op_name = "OP_SECINFO",
1618         },
1619         [OP_SETATTR] = {
1620                 .op_func = (nfsd4op_func)nfsd4_setattr,
1621                 .op_name = "OP_SETATTR",
1622                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1623                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1624                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1625         },
1626         [OP_SETCLIENTID] = {
1627                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1628                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1629                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1630                 .op_name = "OP_SETCLIENTID",
1631                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1632         },
1633         [OP_SETCLIENTID_CONFIRM] = {
1634                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1635                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1636                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1637                 .op_name = "OP_SETCLIENTID_CONFIRM",
1638                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1639         },
1640         [OP_VERIFY] = {
1641                 .op_func = (nfsd4op_func)nfsd4_verify,
1642                 .op_name = "OP_VERIFY",
1643         },
1644         [OP_WRITE] = {
1645                 .op_func = (nfsd4op_func)nfsd4_write,
1646                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1647                 .op_name = "OP_WRITE",
1648                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1649                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1650         },
1651         [OP_RELEASE_LOCKOWNER] = {
1652                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1653                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1654                                 | OP_MODIFIES_SOMETHING,
1655                 .op_name = "OP_RELEASE_LOCKOWNER",
1656                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1657         },
1658
1659         /* NFSv4.1 operations */
1660         [OP_EXCHANGE_ID] = {
1661                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1662                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1663                                 | OP_MODIFIES_SOMETHING,
1664                 .op_name = "OP_EXCHANGE_ID",
1665                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1666         },
1667         [OP_BIND_CONN_TO_SESSION] = {
1668                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1669                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1670                                 | OP_MODIFIES_SOMETHING,
1671                 .op_name = "OP_BIND_CONN_TO_SESSION",
1672                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1673         },
1674         [OP_CREATE_SESSION] = {
1675                 .op_func = (nfsd4op_func)nfsd4_create_session,
1676                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1677                                 | OP_MODIFIES_SOMETHING,
1678                 .op_name = "OP_CREATE_SESSION",
1679                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1680         },
1681         [OP_DESTROY_SESSION] = {
1682                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1683                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1684                                 | OP_MODIFIES_SOMETHING,
1685                 .op_name = "OP_DESTROY_SESSION",
1686                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1687         },
1688         [OP_SEQUENCE] = {
1689                 .op_func = (nfsd4op_func)nfsd4_sequence,
1690                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1691                 .op_name = "OP_SEQUENCE",
1692         },
1693         [OP_DESTROY_CLIENTID] = {
1694                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1695                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1696                                 | OP_MODIFIES_SOMETHING,
1697                 .op_name = "OP_DESTROY_CLIENTID",
1698                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1699         },
1700         [OP_RECLAIM_COMPLETE] = {
1701                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1702                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1703                 .op_name = "OP_RECLAIM_COMPLETE",
1704                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1705         },
1706         [OP_SECINFO_NO_NAME] = {
1707                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1708                 .op_flags = OP_HANDLES_WRONGSEC,
1709                 .op_name = "OP_SECINFO_NO_NAME",
1710         },
1711         [OP_TEST_STATEID] = {
1712                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1713                 .op_flags = ALLOWED_WITHOUT_FH,
1714                 .op_name = "OP_TEST_STATEID",
1715         },
1716         [OP_FREE_STATEID] = {
1717                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1718                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1719                 .op_name = "OP_FREE_STATEID",
1720                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1721         },
1722 };
1723
1724 #ifdef NFSD_DEBUG
1725 static const char *nfsd4_op_name(unsigned opnum)
1726 {
1727         if (opnum < ARRAY_SIZE(nfsd4_ops))
1728                 return nfsd4_ops[opnum].op_name;
1729         return "unknown_operation";
1730 }
1731 #endif
1732
1733 #define nfsd4_voidres                   nfsd4_voidargs
1734 struct nfsd4_voidargs { int dummy; };
1735
1736 static struct svc_procedure             nfsd_procedures4[2] = {
1737         [NFSPROC4_NULL] = {
1738                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1739                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1740                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1741                 .pc_ressize = sizeof(struct nfsd4_voidres),
1742                 .pc_cachetype = RC_NOCACHE,
1743                 .pc_xdrressize = 1,
1744         },
1745         [NFSPROC4_COMPOUND] = {
1746                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1747                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1748                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1749                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1750                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1751                 .pc_release = nfsd4_release_compoundargs,
1752                 .pc_cachetype = RC_NOCACHE,
1753                 .pc_xdrressize = NFSD_BUFSIZE/4,
1754         },
1755 };
1756
1757 struct svc_version      nfsd_version4 = {
1758                 .vs_vers        = 4,
1759                 .vs_nproc       = 2,
1760                 .vs_proc        = nfsd_procedures4,
1761                 .vs_dispatch    = nfsd_dispatch,
1762                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1763 };
1764
1765 /*
1766  * Local variables:
1767  *  c-basic-offset: 8
1768  * End:
1769  */