Merge tag 'jfs-3.10' of git://github.com/kleikamp/linux-shaggy
[linux-3.10.git] / fs / nfsd / nfs4proc.c
1 /*
2  *  Server-side procedures for NFSv4.
3  *
4  *  Copyright (c) 2002 The Regents of the University of Michigan.
5  *  All rights reserved.
6  *
7  *  Kendrick Smith <kmsmith@umich.edu>
8  *  Andy Adamson   <andros@umich.edu>
9  *
10  *  Redistribution and use in source and binary forms, with or without
11  *  modification, are permitted provided that the following conditions
12  *  are met:
13  *
14  *  1. Redistributions of source code must retain the above copyright
15  *     notice, this list of conditions and the following disclaimer.
16  *  2. Redistributions in binary form must reproduce the above copyright
17  *     notice, this list of conditions and the following disclaimer in the
18  *     documentation and/or other materials provided with the distribution.
19  *  3. Neither the name of the University nor the names of its
20  *     contributors may be used to endorse or promote products derived
21  *     from this software without specific prior written permission.
22  *
23  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "idmap.h"
39 #include "cache.h"
40 #include "xdr4.h"
41 #include "vfs.h"
42 #include "current_stateid.h"
43 #include "netns.h"
44
45 #define NFSDDBG_FACILITY                NFSDDBG_PROC
46
47 static u32 nfsd_attrmask[] = {
48         NFSD_WRITEABLE_ATTRS_WORD0,
49         NFSD_WRITEABLE_ATTRS_WORD1,
50         NFSD_WRITEABLE_ATTRS_WORD2
51 };
52
53 static u32 nfsd41_ex_attrmask[] = {
54         NFSD_SUPPATTR_EXCLCREAT_WORD0,
55         NFSD_SUPPATTR_EXCLCREAT_WORD1,
56         NFSD_SUPPATTR_EXCLCREAT_WORD2
57 };
58
59 static __be32
60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
61                    u32 *bmval, u32 *writable)
62 {
63         struct dentry *dentry = cstate->current_fh.fh_dentry;
64
65         /*
66          * Check about attributes are supported by the NFSv4 server or not.
67          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
68          */
69         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
70             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
71             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
72                 return nfserr_attrnotsupp;
73
74         /*
75          * Check FATTR4_WORD0_ACL can be supported
76          * in current environment or not.
77          */
78         if (bmval[0] & FATTR4_WORD0_ACL) {
79                 if (!IS_POSIXACL(dentry->d_inode))
80                         return nfserr_attrnotsupp;
81         }
82
83         /*
84          * According to spec, read-only attributes return ERR_INVAL.
85          */
86         if (writable) {
87                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
88                     (bmval[2] & ~writable[2]))
89                         return nfserr_inval;
90         }
91
92         return nfs_ok;
93 }
94
95 static __be32
96 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
97         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
98 {
99         __be32 status = nfs_ok;
100
101         if (open->op_create == NFS4_OPEN_CREATE) {
102                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
103                     || open->op_createmode == NFS4_CREATE_GUARDED)
104                         status = check_attr_support(rqstp, cstate,
105                                         open->op_bmval, nfsd_attrmask);
106                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
107                         status = check_attr_support(rqstp, cstate,
108                                         open->op_bmval, nfsd41_ex_attrmask);
109         }
110
111         return status;
112 }
113
114 static int
115 is_create_with_attrs(struct nfsd4_open *open)
116 {
117         return open->op_create == NFS4_OPEN_CREATE
118                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
119                     || open->op_createmode == NFS4_CREATE_GUARDED
120                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
121 }
122
123 /*
124  * if error occurs when setting the acl, just clear the acl bit
125  * in the returned attr bitmap.
126  */
127 static void
128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
129                 struct nfs4_acl *acl, u32 *bmval)
130 {
131         __be32 status;
132
133         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
134         if (status)
135                 /*
136                  * We should probably fail the whole open at this point,
137                  * but we've already created the file, so it's too late;
138                  * So this seems the least of evils:
139                  */
140                 bmval[0] &= ~FATTR4_WORD0_ACL;
141 }
142
143 static inline void
144 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
145 {
146         fh_put(dst);
147         dget(src->fh_dentry);
148         if (src->fh_export)
149                 cache_get(&src->fh_export->h);
150         *dst = *src;
151 }
152
153 static __be32
154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
155 {
156         __be32 status;
157
158         if (open->op_truncate &&
159                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
160                 return nfserr_inval;
161
162         accmode |= NFSD_MAY_READ_IF_EXEC;
163
164         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
165                 accmode |= NFSD_MAY_READ;
166         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
167                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
168         if (open->op_share_deny & NFS4_SHARE_DENY_READ)
169                 accmode |= NFSD_MAY_WRITE;
170
171         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
172
173         return status;
174 }
175
176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
177 {
178         umode_t mode = fh->fh_dentry->d_inode->i_mode;
179
180         if (S_ISREG(mode))
181                 return nfs_ok;
182         if (S_ISDIR(mode))
183                 return nfserr_isdir;
184         /*
185          * Using err_symlink as our catch-all case may look odd; but
186          * there's no other obvious error for this case in 4.0, and we
187          * happen to know that it will cause the linux v4 client to do
188          * the right thing on attempts to open something other than a
189          * regular file.
190          */
191         return nfserr_symlink;
192 }
193
194 static __be32
195 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
196 {
197         struct svc_fh *resfh;
198         int accmode;
199         __be32 status;
200
201         resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
202         if (!resfh)
203                 return nfserr_jukebox;
204         fh_init(resfh, NFS4_FHSIZE);
205         open->op_truncate = 0;
206
207         if (open->op_create) {
208                 /* FIXME: check session persistence and pnfs flags.
209                  * The nfsv4.1 spec requires the following semantics:
210                  *
211                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
212                  * Reply Cache  | server |                 |
213                  * -------------+--------+-----------------+--------------------
214                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
215                  *              |        |                 | (SHOULD)
216                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
217                  *              |        |                 | (SHOULD NOT)
218                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
219                  * yes          | no     | GUARDED4        | GUARDED4
220                  * yes          | yes    | GUARDED4        | GUARDED4
221                  */
222
223                 /*
224                  * Note: create modes (UNCHECKED,GUARDED...) are the same
225                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
226                  */
227                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
228                                         open->op_fname.len, &open->op_iattr,
229                                         resfh, open->op_createmode,
230                                         (u32 *)open->op_verf.data,
231                                         &open->op_truncate, &open->op_created);
232
233                 /*
234                  * Following rfc 3530 14.2.16, use the returned bitmask
235                  * to indicate which attributes we used to store the
236                  * verifier:
237                  */
238                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
239                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
240                                                         FATTR4_WORD1_TIME_MODIFY);
241         } else {
242                 status = nfsd_lookup(rqstp, current_fh,
243                                      open->op_fname.data, open->op_fname.len, resfh);
244                 fh_unlock(current_fh);
245         }
246         if (status)
247                 goto out;
248         status = nfsd_check_obj_isreg(resfh);
249         if (status)
250                 goto out;
251
252         if (is_create_with_attrs(open) && open->op_acl != NULL)
253                 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
254
255         /* set reply cache */
256         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
257                         &resfh->fh_handle);
258         accmode = NFSD_MAY_NOP;
259         if (open->op_created)
260                 accmode |= NFSD_MAY_OWNER_OVERRIDE;
261         status = do_open_permission(rqstp, resfh, open, accmode);
262         set_change_info(&open->op_cinfo, current_fh);
263         fh_dup2(current_fh, resfh);
264 out:
265         fh_put(resfh);
266         kfree(resfh);
267         return status;
268 }
269
270 static __be32
271 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
272 {
273         __be32 status;
274
275         /* We don't know the target directory, and therefore can not
276         * set the change info
277         */
278
279         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
280
281         /* set replay cache */
282         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
283                         &current_fh->fh_handle);
284
285         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
286                 (open->op_iattr.ia_size == 0);
287
288         status = do_open_permission(rqstp, current_fh, open,
289                                     NFSD_MAY_OWNER_OVERRIDE);
290
291         return status;
292 }
293
294 static void
295 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
296 {
297         struct nfsd4_sessionid *sid =
298                         (struct nfsd4_sessionid *)session->se_sessionid.data;
299
300         clid->cl_boot = sid->clientid.cl_boot;
301         clid->cl_id = sid->clientid.cl_id;
302 }
303
304 static __be32
305 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
306            struct nfsd4_open *open)
307 {
308         __be32 status;
309         struct nfsd4_compoundres *resp;
310         struct net *net = SVC_NET(rqstp);
311         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
312
313         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
314                 (int)open->op_fname.len, open->op_fname.data,
315                 open->op_openowner);
316
317         /* This check required by spec. */
318         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
319                 return nfserr_inval;
320
321         open->op_created = 0;
322         /*
323          * RFC5661 18.51.3
324          * Before RECLAIM_COMPLETE done, server should deny new lock
325          */
326         if (nfsd4_has_session(cstate) &&
327             !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
328                       &cstate->session->se_client->cl_flags) &&
329             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
330                 return nfserr_grace;
331
332         if (nfsd4_has_session(cstate))
333                 copy_clientid(&open->op_clientid, cstate->session);
334
335         nfs4_lock_state();
336
337         /* check seqid for replay. set nfs4_owner */
338         resp = rqstp->rq_resp;
339         status = nfsd4_process_open1(&resp->cstate, open, nn);
340         if (status == nfserr_replay_me) {
341                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
342                 fh_put(&cstate->current_fh);
343                 fh_copy_shallow(&cstate->current_fh.fh_handle,
344                                 &rp->rp_openfh);
345                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
346                 if (status)
347                         dprintk("nfsd4_open: replay failed"
348                                 " restoring previous filehandle\n");
349                 else
350                         status = nfserr_replay_me;
351         }
352         if (status)
353                 goto out;
354
355         status = nfsd4_check_open_attributes(rqstp, cstate, open);
356         if (status)
357                 goto out;
358
359         /* Openowner is now set, so sequence id will get bumped.  Now we need
360          * these checks before we do any creates: */
361         status = nfserr_grace;
362         if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
363                 goto out;
364         status = nfserr_no_grace;
365         if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
366                 goto out;
367
368         switch (open->op_claim_type) {
369                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
370                 case NFS4_OPEN_CLAIM_NULL:
371                         status = do_open_lookup(rqstp, &cstate->current_fh,
372                                                 open);
373                         if (status)
374                                 goto out;
375                         break;
376                 case NFS4_OPEN_CLAIM_PREVIOUS:
377                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
378                         status = nfs4_check_open_reclaim(&open->op_clientid,
379                                                          cstate->minorversion,
380                                                          nn);
381                         if (status)
382                                 goto out;
383                 case NFS4_OPEN_CLAIM_FH:
384                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
385                         status = do_open_fhandle(rqstp, &cstate->current_fh,
386                                                  open);
387                         if (status)
388                                 goto out;
389                         break;
390                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
391                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
392                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
393                         dprintk("NFSD: unsupported OPEN claim type %d\n",
394                                 open->op_claim_type);
395                         status = nfserr_notsupp;
396                         goto out;
397                 default:
398                         dprintk("NFSD: Invalid OPEN claim type %d\n",
399                                 open->op_claim_type);
400                         status = nfserr_inval;
401                         goto out;
402         }
403         /*
404          * nfsd4_process_open2() does the actual opening of the file.  If
405          * successful, it (1) truncates the file if open->op_truncate was
406          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
407          */
408         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
409         WARN_ON(status && open->op_created);
410 out:
411         nfsd4_cleanup_open_state(open, status);
412         if (open->op_openowner)
413                 cstate->replay_owner = &open->op_openowner->oo_owner;
414         else
415                 nfs4_unlock_state();
416         return status;
417 }
418
419 /*
420  * filehandle-manipulating ops.
421  */
422 static __be32
423 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
424             struct svc_fh **getfh)
425 {
426         if (!cstate->current_fh.fh_dentry)
427                 return nfserr_nofilehandle;
428
429         *getfh = &cstate->current_fh;
430         return nfs_ok;
431 }
432
433 static __be32
434 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
435             struct nfsd4_putfh *putfh)
436 {
437         fh_put(&cstate->current_fh);
438         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
439         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
440                putfh->pf_fhlen);
441         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
442 }
443
444 static __be32
445 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
446                 void *arg)
447 {
448         __be32 status;
449
450         fh_put(&cstate->current_fh);
451         status = exp_pseudoroot(rqstp, &cstate->current_fh);
452         return status;
453 }
454
455 static __be32
456 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
457                 void *arg)
458 {
459         if (!cstate->save_fh.fh_dentry)
460                 return nfserr_restorefh;
461
462         fh_dup2(&cstate->current_fh, &cstate->save_fh);
463         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
464                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
465                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
466         }
467         return nfs_ok;
468 }
469
470 static __be32
471 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
472              void *arg)
473 {
474         if (!cstate->current_fh.fh_dentry)
475                 return nfserr_nofilehandle;
476
477         fh_dup2(&cstate->save_fh, &cstate->current_fh);
478         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
479                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
480                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
481         }
482         return nfs_ok;
483 }
484
485 /*
486  * misc nfsv4 ops
487  */
488 static __be32
489 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
490              struct nfsd4_access *access)
491 {
492         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
493                 return nfserr_inval;
494
495         access->ac_resp_access = access->ac_req_access;
496         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
497                            &access->ac_supported);
498 }
499
500 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
501 {
502         __be32 verf[2];
503         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
504
505         verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
506         verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
507         memcpy(verifier->data, verf, sizeof(verifier->data));
508 }
509
510 static __be32
511 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
512              struct nfsd4_commit *commit)
513 {
514         gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
515         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
516                              commit->co_count);
517 }
518
519 static __be32
520 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
521              struct nfsd4_create *create)
522 {
523         struct svc_fh resfh;
524         __be32 status;
525         dev_t rdev;
526
527         fh_init(&resfh, NFS4_FHSIZE);
528
529         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
530                            NFSD_MAY_CREATE);
531         if (status)
532                 return status;
533
534         status = check_attr_support(rqstp, cstate, create->cr_bmval,
535                                     nfsd_attrmask);
536         if (status)
537                 return status;
538
539         switch (create->cr_type) {
540         case NF4LNK:
541                 /* ugh! we have to null-terminate the linktext, or
542                  * vfs_symlink() will choke.  it is always safe to
543                  * null-terminate by brute force, since at worst we
544                  * will overwrite the first byte of the create namelen
545                  * in the XDR buffer, which has already been extracted
546                  * during XDR decode.
547                  */
548                 create->cr_linkname[create->cr_linklen] = 0;
549
550                 status = nfsd_symlink(rqstp, &cstate->current_fh,
551                                       create->cr_name, create->cr_namelen,
552                                       create->cr_linkname, create->cr_linklen,
553                                       &resfh, &create->cr_iattr);
554                 break;
555
556         case NF4BLK:
557                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
558                 if (MAJOR(rdev) != create->cr_specdata1 ||
559                     MINOR(rdev) != create->cr_specdata2)
560                         return nfserr_inval;
561                 status = nfsd_create(rqstp, &cstate->current_fh,
562                                      create->cr_name, create->cr_namelen,
563                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
564                 break;
565
566         case NF4CHR:
567                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
568                 if (MAJOR(rdev) != create->cr_specdata1 ||
569                     MINOR(rdev) != create->cr_specdata2)
570                         return nfserr_inval;
571                 status = nfsd_create(rqstp, &cstate->current_fh,
572                                      create->cr_name, create->cr_namelen,
573                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
574                 break;
575
576         case NF4SOCK:
577                 status = nfsd_create(rqstp, &cstate->current_fh,
578                                      create->cr_name, create->cr_namelen,
579                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
580                 break;
581
582         case NF4FIFO:
583                 status = nfsd_create(rqstp, &cstate->current_fh,
584                                      create->cr_name, create->cr_namelen,
585                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
586                 break;
587
588         case NF4DIR:
589                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
590                 status = nfsd_create(rqstp, &cstate->current_fh,
591                                      create->cr_name, create->cr_namelen,
592                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
593                 break;
594
595         default:
596                 status = nfserr_badtype;
597         }
598
599         if (status)
600                 goto out;
601
602         if (create->cr_acl != NULL)
603                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
604                                 create->cr_bmval);
605
606         fh_unlock(&cstate->current_fh);
607         set_change_info(&create->cr_cinfo, &cstate->current_fh);
608         fh_dup2(&cstate->current_fh, &resfh);
609 out:
610         fh_put(&resfh);
611         return status;
612 }
613
614 static __be32
615 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
616               struct nfsd4_getattr *getattr)
617 {
618         __be32 status;
619
620         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
621         if (status)
622                 return status;
623
624         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
625                 return nfserr_inval;
626
627         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
628         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
629         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
630
631         getattr->ga_fhp = &cstate->current_fh;
632         return nfs_ok;
633 }
634
635 static __be32
636 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
637            struct nfsd4_link *link)
638 {
639         __be32 status = nfserr_nofilehandle;
640
641         if (!cstate->save_fh.fh_dentry)
642                 return status;
643         status = nfsd_link(rqstp, &cstate->current_fh,
644                            link->li_name, link->li_namelen, &cstate->save_fh);
645         if (!status)
646                 set_change_info(&link->li_cinfo, &cstate->current_fh);
647         return status;
648 }
649
650 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
651 {
652         struct svc_fh tmp_fh;
653         __be32 ret;
654
655         fh_init(&tmp_fh, NFS4_FHSIZE);
656         ret = exp_pseudoroot(rqstp, &tmp_fh);
657         if (ret)
658                 return ret;
659         if (tmp_fh.fh_dentry == fh->fh_dentry) {
660                 fh_put(&tmp_fh);
661                 return nfserr_noent;
662         }
663         fh_put(&tmp_fh);
664         return nfsd_lookup(rqstp, fh, "..", 2, fh);
665 }
666
667 static __be32
668 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
669               void *arg)
670 {
671         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
672 }
673
674 static __be32
675 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
676              struct nfsd4_lookup *lookup)
677 {
678         return nfsd_lookup(rqstp, &cstate->current_fh,
679                            lookup->lo_name, lookup->lo_len,
680                            &cstate->current_fh);
681 }
682
683 static __be32
684 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
685            struct nfsd4_read *read)
686 {
687         __be32 status;
688
689         /* no need to check permission - this will be done in nfsd_read() */
690
691         read->rd_filp = NULL;
692         if (read->rd_offset >= OFFSET_MAX)
693                 return nfserr_inval;
694
695         /*
696          * If we do a zero copy read, then a client will see read data
697          * that reflects the state of the file *after* performing the
698          * following compound.
699          *
700          * To ensure proper ordering, we therefore turn off zero copy if
701          * the client wants us to do more in this compound:
702          */
703         if (!nfsd4_last_compound_op(rqstp))
704                 rqstp->rq_splice_ok = false;
705
706         nfs4_lock_state();
707         /* check stateid */
708         if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
709                                                  cstate, &read->rd_stateid,
710                                                  RD_STATE, &read->rd_filp))) {
711                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
712                 goto out;
713         }
714         if (read->rd_filp)
715                 get_file(read->rd_filp);
716         status = nfs_ok;
717 out:
718         nfs4_unlock_state();
719         read->rd_rqstp = rqstp;
720         read->rd_fhp = &cstate->current_fh;
721         return status;
722 }
723
724 static __be32
725 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726               struct nfsd4_readdir *readdir)
727 {
728         u64 cookie = readdir->rd_cookie;
729         static const nfs4_verifier zeroverf;
730
731         /* no need to check permission - this will be done in nfsd_readdir() */
732
733         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
734                 return nfserr_inval;
735
736         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
737         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
738         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
739
740         if ((cookie == 1) || (cookie == 2) ||
741             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
742                 return nfserr_bad_cookie;
743
744         readdir->rd_rqstp = rqstp;
745         readdir->rd_fhp = &cstate->current_fh;
746         return nfs_ok;
747 }
748
749 static __be32
750 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
751                struct nfsd4_readlink *readlink)
752 {
753         readlink->rl_rqstp = rqstp;
754         readlink->rl_fhp = &cstate->current_fh;
755         return nfs_ok;
756 }
757
758 static __be32
759 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
760              struct nfsd4_remove *remove)
761 {
762         __be32 status;
763
764         if (locks_in_grace(SVC_NET(rqstp)))
765                 return nfserr_grace;
766         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
767                              remove->rm_name, remove->rm_namelen);
768         if (!status) {
769                 fh_unlock(&cstate->current_fh);
770                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
771         }
772         return status;
773 }
774
775 static __be32
776 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
777              struct nfsd4_rename *rename)
778 {
779         __be32 status = nfserr_nofilehandle;
780
781         if (!cstate->save_fh.fh_dentry)
782                 return status;
783         if (locks_in_grace(SVC_NET(rqstp)) &&
784                 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
785                 return nfserr_grace;
786         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
787                              rename->rn_snamelen, &cstate->current_fh,
788                              rename->rn_tname, rename->rn_tnamelen);
789
790         /* the underlying filesystem returns different error's than required
791          * by NFSv4. both save_fh and current_fh have been verified.. */
792         if (status == nfserr_isdir)
793                 status = nfserr_exist;
794         else if ((status == nfserr_notdir) &&
795                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
796                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
797                 status = nfserr_exist;
798
799         if (!status) {
800                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
801                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
802         }
803         return status;
804 }
805
806 static __be32
807 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
808               struct nfsd4_secinfo *secinfo)
809 {
810         struct svc_fh resfh;
811         struct svc_export *exp;
812         struct dentry *dentry;
813         __be32 err;
814
815         fh_init(&resfh, NFS4_FHSIZE);
816         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
817         if (err)
818                 return err;
819         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
820                                     secinfo->si_name, secinfo->si_namelen,
821                                     &exp, &dentry);
822         if (err)
823                 return err;
824         if (dentry->d_inode == NULL) {
825                 exp_put(exp);
826                 err = nfserr_noent;
827         } else
828                 secinfo->si_exp = exp;
829         dput(dentry);
830         if (cstate->minorversion)
831                 /* See rfc 5661 section 2.6.3.1.1.8 */
832                 fh_put(&cstate->current_fh);
833         return err;
834 }
835
836 static __be32
837 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
838               struct nfsd4_secinfo_no_name *sin)
839 {
840         __be32 err;
841
842         switch (sin->sin_style) {
843         case NFS4_SECINFO_STYLE4_CURRENT_FH:
844                 break;
845         case NFS4_SECINFO_STYLE4_PARENT:
846                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
847                 if (err)
848                         return err;
849                 break;
850         default:
851                 return nfserr_inval;
852         }
853         exp_get(cstate->current_fh.fh_export);
854         sin->sin_exp = cstate->current_fh.fh_export;
855         fh_put(&cstate->current_fh);
856         return nfs_ok;
857 }
858
859 static __be32
860 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
861               struct nfsd4_setattr *setattr)
862 {
863         __be32 status = nfs_ok;
864         int err;
865
866         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
867                 nfs4_lock_state();
868                 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
869                         &setattr->sa_stateid, WR_STATE, NULL);
870                 nfs4_unlock_state();
871                 if (status) {
872                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
873                         return status;
874                 }
875         }
876         err = fh_want_write(&cstate->current_fh);
877         if (err)
878                 return nfserrno(err);
879         status = nfs_ok;
880
881         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
882                                     nfsd_attrmask);
883         if (status)
884                 goto out;
885
886         if (setattr->sa_acl != NULL)
887                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
888                                             setattr->sa_acl);
889         if (status)
890                 goto out;
891         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
892                                 0, (time_t)0);
893 out:
894         fh_drop_write(&cstate->current_fh);
895         return status;
896 }
897
898 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
899 {
900         int i = 1;
901         int buflen = write->wr_buflen;
902
903         vec[0].iov_base = write->wr_head.iov_base;
904         vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
905         buflen -= vec[0].iov_len;
906
907         while (buflen) {
908                 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
909                 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
910                 buflen -= vec[i].iov_len;
911                 i++;
912         }
913         return i;
914 }
915
916 static __be32
917 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
918             struct nfsd4_write *write)
919 {
920         stateid_t *stateid = &write->wr_stateid;
921         struct file *filp = NULL;
922         __be32 status = nfs_ok;
923         unsigned long cnt;
924         int nvecs;
925
926         /* no need to check permission - this will be done in nfsd_write() */
927
928         if (write->wr_offset >= OFFSET_MAX)
929                 return nfserr_inval;
930
931         nfs4_lock_state();
932         status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
933                                         cstate, stateid, WR_STATE, &filp);
934         if (filp)
935                 get_file(filp);
936         nfs4_unlock_state();
937
938         if (status) {
939                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
940                 return status;
941         }
942
943         cnt = write->wr_buflen;
944         write->wr_how_written = write->wr_stable_how;
945         gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
946
947         nvecs = fill_in_write_vector(rqstp->rq_vec, write);
948         WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
949
950         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
951                              write->wr_offset, rqstp->rq_vec, nvecs,
952                              &cnt, &write->wr_how_written);
953         if (filp)
954                 fput(filp);
955
956         write->wr_bytes_written = cnt;
957
958         return status;
959 }
960
961 /* This routine never returns NFS_OK!  If there are no other errors, it
962  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
963  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
964  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
965  */
966 static __be32
967 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
968              struct nfsd4_verify *verify)
969 {
970         __be32 *buf, *p;
971         int count;
972         __be32 status;
973
974         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
975         if (status)
976                 return status;
977
978         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
979         if (status)
980                 return status;
981
982         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
983             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
984                 return nfserr_inval;
985         if (verify->ve_attrlen & 3)
986                 return nfserr_inval;
987
988         /* count in words:
989          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
990          */
991         count = 4 + (verify->ve_attrlen >> 2);
992         buf = kmalloc(count << 2, GFP_KERNEL);
993         if (!buf)
994                 return nfserr_jukebox;
995
996         p = buf;
997         status = nfsd4_encode_fattr(&cstate->current_fh,
998                                     cstate->current_fh.fh_export,
999                                     cstate->current_fh.fh_dentry, &p,
1000                                     count, verify->ve_bmval,
1001                                     rqstp, 0);
1002
1003         /* this means that nfsd4_encode_fattr() ran out of space */
1004         if (status == nfserr_resource)
1005                 status = nfserr_not_same;
1006         if (status)
1007                 goto out_kfree;
1008
1009         /* skip bitmap */
1010         p = buf + 1 + ntohl(buf[0]);
1011         status = nfserr_not_same;
1012         if (ntohl(*p++) != verify->ve_attrlen)
1013                 goto out_kfree;
1014         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1015                 status = nfserr_same;
1016
1017 out_kfree:
1018         kfree(buf);
1019         return status;
1020 }
1021
1022 static __be32
1023 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1024               struct nfsd4_verify *verify)
1025 {
1026         __be32 status;
1027
1028         status = _nfsd4_verify(rqstp, cstate, verify);
1029         return status == nfserr_not_same ? nfs_ok : status;
1030 }
1031
1032 static __be32
1033 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1034              struct nfsd4_verify *verify)
1035 {
1036         __be32 status;
1037
1038         status = _nfsd4_verify(rqstp, cstate, verify);
1039         return status == nfserr_same ? nfs_ok : status;
1040 }
1041
1042 /*
1043  * NULL call.
1044  */
1045 static __be32
1046 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1047 {
1048         return nfs_ok;
1049 }
1050
1051 static inline void nfsd4_increment_op_stats(u32 opnum)
1052 {
1053         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1054                 nfsdstats.nfs4_opcount[opnum]++;
1055 }
1056
1057 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1058                               void *);
1059 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1060 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1061 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1062
1063 enum nfsd4_op_flags {
1064         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1065         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1066         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1067         /* For rfc 5661 section 2.6.3.1.1: */
1068         OP_HANDLES_WRONGSEC = 1 << 3,
1069         OP_IS_PUTFH_LIKE = 1 << 4,
1070         /*
1071          * These are the ops whose result size we estimate before
1072          * encoding, to avoid performing an op then not being able to
1073          * respond or cache a response.  This includes writes and setattrs
1074          * as well as the operations usually called "nonidempotent":
1075          */
1076         OP_MODIFIES_SOMETHING = 1 << 5,
1077         /*
1078          * Cache compounds containing these ops in the xid-based drc:
1079          * We use the DRC for compounds containing non-idempotent
1080          * operations, *except* those that are 4.1-specific (since
1081          * sessions provide their own EOS), and except for stateful
1082          * operations other than setclientid and setclientid_confirm
1083          * (since sequence numbers provide EOS for open, lock, etc in
1084          * the v4.0 case).
1085          */
1086         OP_CACHEME = 1 << 6,
1087         /*
1088          * These are ops which clear current state id.
1089          */
1090         OP_CLEAR_STATEID = 1 << 7,
1091 };
1092
1093 struct nfsd4_operation {
1094         nfsd4op_func op_func;
1095         u32 op_flags;
1096         char *op_name;
1097         /* Try to get response size before operation */
1098         nfsd4op_rsize op_rsize_bop;
1099         stateid_getter op_get_currentstateid;
1100         stateid_setter op_set_currentstateid;
1101 };
1102
1103 static struct nfsd4_operation nfsd4_ops[];
1104
1105 #ifdef NFSD_DEBUG
1106 static const char *nfsd4_op_name(unsigned opnum);
1107 #endif
1108
1109 /*
1110  * Enforce NFSv4.1 COMPOUND ordering rules:
1111  *
1112  * Also note, enforced elsewhere:
1113  *      - SEQUENCE other than as first op results in
1114  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1115  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1116  *        (Enforced in nfsd4_bind_conn_to_session().)
1117  *      - DESTROY_SESSION must be the final operation in a compound, if
1118  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1119  *        (Enforced in nfsd4_destroy_session().)
1120  */
1121 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1122 {
1123         struct nfsd4_op *op = &args->ops[0];
1124
1125         /* These ordering requirements don't apply to NFSv4.0: */
1126         if (args->minorversion == 0)
1127                 return nfs_ok;
1128         /* This is weird, but OK, not our problem: */
1129         if (args->opcnt == 0)
1130                 return nfs_ok;
1131         if (op->status == nfserr_op_illegal)
1132                 return nfs_ok;
1133         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1134                 return nfserr_op_not_in_session;
1135         if (op->opnum == OP_SEQUENCE)
1136                 return nfs_ok;
1137         if (args->opcnt != 1)
1138                 return nfserr_not_only_op;
1139         return nfs_ok;
1140 }
1141
1142 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1143 {
1144         return &nfsd4_ops[op->opnum];
1145 }
1146
1147 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1148 {
1149         return OPDESC(op)->op_flags & OP_CACHEME;
1150 }
1151
1152 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1153 {
1154         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1155         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1156         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1157         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1158         struct nfsd4_operation *thisd;
1159         struct nfsd4_operation *nextd;
1160
1161         thisd = OPDESC(this);
1162         /*
1163          * Most ops check wronsec on our own; only the putfh-like ops
1164          * have special rules.
1165          */
1166         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1167                 return false;
1168         /*
1169          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1170          * put-filehandle operation if we're not going to use the
1171          * result:
1172          */
1173         if (argp->opcnt == resp->opcnt)
1174                 return false;
1175
1176         nextd = OPDESC(next);
1177         /*
1178          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1179          * errors themselves as necessary; others should check for them
1180          * now:
1181          */
1182         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1183 }
1184
1185 /*
1186  * COMPOUND call.
1187  */
1188 static __be32
1189 nfsd4_proc_compound(struct svc_rqst *rqstp,
1190                     struct nfsd4_compoundargs *args,
1191                     struct nfsd4_compoundres *resp)
1192 {
1193         struct nfsd4_op *op;
1194         struct nfsd4_operation *opdesc;
1195         struct nfsd4_compound_state *cstate = &resp->cstate;
1196         int             slack_bytes;
1197         u32             plen = 0;
1198         __be32          status;
1199
1200         resp->xbuf = &rqstp->rq_res;
1201         resp->p = rqstp->rq_res.head[0].iov_base +
1202                                                 rqstp->rq_res.head[0].iov_len;
1203         resp->tagp = resp->p;
1204         /* reserve space for: taglen, tag, and opcnt */
1205         resp->p += 2 + XDR_QUADLEN(args->taglen);
1206         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1207         resp->taglen = args->taglen;
1208         resp->tag = args->tag;
1209         resp->opcnt = 0;
1210         resp->rqstp = rqstp;
1211         resp->cstate.minorversion = args->minorversion;
1212         resp->cstate.replay_owner = NULL;
1213         resp->cstate.session = NULL;
1214         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1215         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1216         /*
1217          * Don't use the deferral mechanism for NFSv4; compounds make it
1218          * too hard to avoid non-idempotency problems.
1219          */
1220         rqstp->rq_usedeferral = 0;
1221
1222         /*
1223          * According to RFC3010, this takes precedence over all other errors.
1224          */
1225         status = nfserr_minor_vers_mismatch;
1226         if (args->minorversion > nfsd_supported_minorversion)
1227                 goto out;
1228
1229         status = nfs41_check_op_ordering(args);
1230         if (status) {
1231                 op = &args->ops[0];
1232                 op->status = status;
1233                 goto encode_op;
1234         }
1235
1236         while (!status && resp->opcnt < args->opcnt) {
1237                 op = &args->ops[resp->opcnt++];
1238
1239                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1240                         resp->opcnt, args->opcnt, op->opnum,
1241                         nfsd4_op_name(op->opnum));
1242                 /*
1243                  * The XDR decode routines may have pre-set op->status;
1244                  * for example, if there is a miscellaneous XDR error
1245                  * it will be set to nfserr_bad_xdr.
1246                  */
1247                 if (op->status)
1248                         goto encode_op;
1249
1250                 /* We must be able to encode a successful response to
1251                  * this operation, with enough room left over to encode a
1252                  * failed response to the next operation.  If we don't
1253                  * have enough room, fail with ERR_RESOURCE.
1254                  */
1255                 slack_bytes = (char *)resp->end - (char *)resp->p;
1256                 if (slack_bytes < COMPOUND_SLACK_SPACE
1257                                 + COMPOUND_ERR_SLACK_SPACE) {
1258                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1259                         op->status = nfserr_resource;
1260                         goto encode_op;
1261                 }
1262
1263                 opdesc = OPDESC(op);
1264
1265                 if (!cstate->current_fh.fh_dentry) {
1266                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1267                                 op->status = nfserr_nofilehandle;
1268                                 goto encode_op;
1269                         }
1270                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1271                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1272                         op->status = nfserr_moved;
1273                         goto encode_op;
1274                 }
1275
1276                 /* If op is non-idempotent */
1277                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1278                         plen = opdesc->op_rsize_bop(rqstp, op);
1279                         op->status = nfsd4_check_resp_size(resp, plen);
1280                 }
1281
1282                 if (op->status)
1283                         goto encode_op;
1284
1285                 if (opdesc->op_func) {
1286                         if (opdesc->op_get_currentstateid)
1287                                 opdesc->op_get_currentstateid(cstate, &op->u);
1288                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1289                 } else
1290                         BUG_ON(op->status == nfs_ok);
1291
1292                 if (!op->status) {
1293                         if (opdesc->op_set_currentstateid)
1294                                 opdesc->op_set_currentstateid(cstate, &op->u);
1295
1296                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1297                                 clear_current_stateid(cstate);
1298
1299                         if (need_wrongsec_check(rqstp))
1300                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1301                 }
1302
1303 encode_op:
1304                 /* Only from SEQUENCE */
1305                 if (resp->cstate.status == nfserr_replay_cache) {
1306                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1307                         status = op->status;
1308                         goto out;
1309                 }
1310                 if (op->status == nfserr_replay_me) {
1311                         op->replay = &cstate->replay_owner->so_replay;
1312                         nfsd4_encode_replay(resp, op);
1313                         status = op->status = op->replay->rp_status;
1314                 } else {
1315                         nfsd4_encode_operation(resp, op);
1316                         status = op->status;
1317                 }
1318
1319                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1320                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1321                         be32_to_cpu(status));
1322
1323                 if (cstate->replay_owner) {
1324                         nfs4_unlock_state();
1325                         cstate->replay_owner = NULL;
1326                 }
1327                 /* XXX Ugh, we need to get rid of this kind of special case: */
1328                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1329                         fput(op->u.read.rd_filp);
1330
1331                 nfsd4_increment_op_stats(op->opnum);
1332         }
1333
1334         resp->cstate.status = status;
1335         fh_put(&resp->cstate.current_fh);
1336         fh_put(&resp->cstate.save_fh);
1337         BUG_ON(resp->cstate.replay_owner);
1338 out:
1339         /* Reset deferral mechanism for RPC deferrals */
1340         rqstp->rq_usedeferral = 1;
1341         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1342         return status;
1343 }
1344
1345 #define op_encode_hdr_size              (2)
1346 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1347 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1348 #define op_encode_change_info_maxsz     (5)
1349 #define nfs4_fattr_bitmap_maxsz         (4)
1350
1351 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1352 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1353
1354 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1355
1356 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1357 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1358                                          op_encode_ace_maxsz)
1359
1360 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1361
1362 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1363 {
1364         return (op_encode_hdr_size) * sizeof(__be32);
1365 }
1366
1367 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1368 {
1369         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1370 }
1371
1372 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1373 {
1374         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1375 }
1376
1377 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1378 {
1379         return (op_encode_hdr_size + op_encode_change_info_maxsz
1380                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1381 }
1382
1383 static inline u32 nfsd4_link_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_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1390 {
1391         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1392                 * sizeof(__be32);
1393 }
1394
1395 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1396 {
1397         return (op_encode_hdr_size + op_encode_stateid_maxsz
1398                 + op_encode_change_info_maxsz + 1
1399                 + nfs4_fattr_bitmap_maxsz
1400                 + op_encode_delegation_maxsz) * sizeof(__be32);
1401 }
1402
1403 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1404 {
1405         u32 maxcount = 0, rlen = 0;
1406
1407         maxcount = svc_max_payload(rqstp);
1408         rlen = op->u.read.rd_length;
1409
1410         if (rlen > maxcount)
1411                 rlen = maxcount;
1412
1413         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1414 }
1415
1416 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1417 {
1418         u32 rlen = op->u.readdir.rd_maxcount;
1419
1420         if (rlen > PAGE_SIZE)
1421                 rlen = PAGE_SIZE;
1422
1423         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1424                  * sizeof(__be32) + rlen;
1425 }
1426
1427 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1428 {
1429         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1430                 * sizeof(__be32);
1431 }
1432
1433 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1434 {
1435         return (op_encode_hdr_size + op_encode_change_info_maxsz
1436                 + op_encode_change_info_maxsz) * sizeof(__be32);
1437 }
1438
1439 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1440 {
1441         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1442 }
1443
1444 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1445 {
1446         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1447 }
1448
1449 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1450 {
1451         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1452 }
1453
1454 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1455 {
1456         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1457                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1458                 2 + /*eir_server_owner.so_minor_id */\
1459                 /* eir_server_owner.so_major_id<> */\
1460                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1461                 /* eir_server_scope<> */\
1462                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1463                 1 + /* eir_server_impl_id array length */\
1464                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1465 }
1466
1467 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1468 {
1469         return (op_encode_hdr_size + \
1470                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1471                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1472 }
1473
1474 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1475 {
1476         return (op_encode_hdr_size + \
1477                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1478                 2 + /* csr_sequence, csr_flags */\
1479                 op_encode_channel_attrs_maxsz + \
1480                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1481 }
1482
1483 static struct nfsd4_operation nfsd4_ops[] = {
1484         [OP_ACCESS] = {
1485                 .op_func = (nfsd4op_func)nfsd4_access,
1486                 .op_name = "OP_ACCESS",
1487         },
1488         [OP_CLOSE] = {
1489                 .op_func = (nfsd4op_func)nfsd4_close,
1490                 .op_flags = OP_MODIFIES_SOMETHING,
1491                 .op_name = "OP_CLOSE",
1492                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1493                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1494                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1495         },
1496         [OP_COMMIT] = {
1497                 .op_func = (nfsd4op_func)nfsd4_commit,
1498                 .op_flags = OP_MODIFIES_SOMETHING,
1499                 .op_name = "OP_COMMIT",
1500                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1501         },
1502         [OP_CREATE] = {
1503                 .op_func = (nfsd4op_func)nfsd4_create,
1504                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1505                 .op_name = "OP_CREATE",
1506                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1507         },
1508         [OP_DELEGRETURN] = {
1509                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1510                 .op_flags = OP_MODIFIES_SOMETHING,
1511                 .op_name = "OP_DELEGRETURN",
1512                 .op_rsize_bop = nfsd4_only_status_rsize,
1513                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1514         },
1515         [OP_GETATTR] = {
1516                 .op_func = (nfsd4op_func)nfsd4_getattr,
1517                 .op_flags = ALLOWED_ON_ABSENT_FS,
1518                 .op_name = "OP_GETATTR",
1519         },
1520         [OP_GETFH] = {
1521                 .op_func = (nfsd4op_func)nfsd4_getfh,
1522                 .op_name = "OP_GETFH",
1523         },
1524         [OP_LINK] = {
1525                 .op_func = (nfsd4op_func)nfsd4_link,
1526                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1527                                 | OP_CACHEME,
1528                 .op_name = "OP_LINK",
1529                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1530         },
1531         [OP_LOCK] = {
1532                 .op_func = (nfsd4op_func)nfsd4_lock,
1533                 .op_flags = OP_MODIFIES_SOMETHING,
1534                 .op_name = "OP_LOCK",
1535                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1536                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1537         },
1538         [OP_LOCKT] = {
1539                 .op_func = (nfsd4op_func)nfsd4_lockt,
1540                 .op_name = "OP_LOCKT",
1541         },
1542         [OP_LOCKU] = {
1543                 .op_func = (nfsd4op_func)nfsd4_locku,
1544                 .op_flags = OP_MODIFIES_SOMETHING,
1545                 .op_name = "OP_LOCKU",
1546                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1547                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1548         },
1549         [OP_LOOKUP] = {
1550                 .op_func = (nfsd4op_func)nfsd4_lookup,
1551                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1552                 .op_name = "OP_LOOKUP",
1553         },
1554         [OP_LOOKUPP] = {
1555                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1556                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1557                 .op_name = "OP_LOOKUPP",
1558         },
1559         [OP_NVERIFY] = {
1560                 .op_func = (nfsd4op_func)nfsd4_nverify,
1561                 .op_name = "OP_NVERIFY",
1562         },
1563         [OP_OPEN] = {
1564                 .op_func = (nfsd4op_func)nfsd4_open,
1565                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1566                 .op_name = "OP_OPEN",
1567                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1568                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1569         },
1570         [OP_OPEN_CONFIRM] = {
1571                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1572                 .op_flags = OP_MODIFIES_SOMETHING,
1573                 .op_name = "OP_OPEN_CONFIRM",
1574                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1575         },
1576         [OP_OPEN_DOWNGRADE] = {
1577                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1578                 .op_flags = OP_MODIFIES_SOMETHING,
1579                 .op_name = "OP_OPEN_DOWNGRADE",
1580                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1581                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1582                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1583         },
1584         [OP_PUTFH] = {
1585                 .op_func = (nfsd4op_func)nfsd4_putfh,
1586                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1587                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1588                                 | OP_CLEAR_STATEID,
1589                 .op_name = "OP_PUTFH",
1590                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1591         },
1592         [OP_PUTPUBFH] = {
1593                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1594                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1595                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1596                                 | OP_CLEAR_STATEID,
1597                 .op_name = "OP_PUTPUBFH",
1598                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1599         },
1600         [OP_PUTROOTFH] = {
1601                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1602                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1603                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1604                                 | OP_CLEAR_STATEID,
1605                 .op_name = "OP_PUTROOTFH",
1606                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1607         },
1608         [OP_READ] = {
1609                 .op_func = (nfsd4op_func)nfsd4_read,
1610                 .op_flags = OP_MODIFIES_SOMETHING,
1611                 .op_name = "OP_READ",
1612                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1613                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1614         },
1615         [OP_READDIR] = {
1616                 .op_func = (nfsd4op_func)nfsd4_readdir,
1617                 .op_flags = OP_MODIFIES_SOMETHING,
1618                 .op_name = "OP_READDIR",
1619                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1620         },
1621         [OP_READLINK] = {
1622                 .op_func = (nfsd4op_func)nfsd4_readlink,
1623                 .op_name = "OP_READLINK",
1624         },
1625         [OP_REMOVE] = {
1626                 .op_func = (nfsd4op_func)nfsd4_remove,
1627                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1628                 .op_name = "OP_REMOVE",
1629                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1630         },
1631         [OP_RENAME] = {
1632                 .op_func = (nfsd4op_func)nfsd4_rename,
1633                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1634                 .op_name = "OP_RENAME",
1635                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1636         },
1637         [OP_RENEW] = {
1638                 .op_func = (nfsd4op_func)nfsd4_renew,
1639                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1640                                 | OP_MODIFIES_SOMETHING,
1641                 .op_name = "OP_RENEW",
1642                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1643
1644         },
1645         [OP_RESTOREFH] = {
1646                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1647                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1648                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1649                 .op_name = "OP_RESTOREFH",
1650                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1651         },
1652         [OP_SAVEFH] = {
1653                 .op_func = (nfsd4op_func)nfsd4_savefh,
1654                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1655                 .op_name = "OP_SAVEFH",
1656                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1657         },
1658         [OP_SECINFO] = {
1659                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1660                 .op_flags = OP_HANDLES_WRONGSEC,
1661                 .op_name = "OP_SECINFO",
1662         },
1663         [OP_SETATTR] = {
1664                 .op_func = (nfsd4op_func)nfsd4_setattr,
1665                 .op_name = "OP_SETATTR",
1666                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1667                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1668                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1669         },
1670         [OP_SETCLIENTID] = {
1671                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1672                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1673                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1674                 .op_name = "OP_SETCLIENTID",
1675                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1676         },
1677         [OP_SETCLIENTID_CONFIRM] = {
1678                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1679                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1680                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1681                 .op_name = "OP_SETCLIENTID_CONFIRM",
1682                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1683         },
1684         [OP_VERIFY] = {
1685                 .op_func = (nfsd4op_func)nfsd4_verify,
1686                 .op_name = "OP_VERIFY",
1687         },
1688         [OP_WRITE] = {
1689                 .op_func = (nfsd4op_func)nfsd4_write,
1690                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1691                 .op_name = "OP_WRITE",
1692                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1693                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1694         },
1695         [OP_RELEASE_LOCKOWNER] = {
1696                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1697                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1698                                 | OP_MODIFIES_SOMETHING,
1699                 .op_name = "OP_RELEASE_LOCKOWNER",
1700                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1701         },
1702
1703         /* NFSv4.1 operations */
1704         [OP_EXCHANGE_ID] = {
1705                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1706                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1707                                 | OP_MODIFIES_SOMETHING,
1708                 .op_name = "OP_EXCHANGE_ID",
1709                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1710         },
1711         [OP_BACKCHANNEL_CTL] = {
1712                 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1713                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1714                 .op_name = "OP_BACKCHANNEL_CTL",
1715                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1716         },
1717         [OP_BIND_CONN_TO_SESSION] = {
1718                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1719                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1720                                 | OP_MODIFIES_SOMETHING,
1721                 .op_name = "OP_BIND_CONN_TO_SESSION",
1722                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1723         },
1724         [OP_CREATE_SESSION] = {
1725                 .op_func = (nfsd4op_func)nfsd4_create_session,
1726                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1727                                 | OP_MODIFIES_SOMETHING,
1728                 .op_name = "OP_CREATE_SESSION",
1729                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1730         },
1731         [OP_DESTROY_SESSION] = {
1732                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1733                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1734                                 | OP_MODIFIES_SOMETHING,
1735                 .op_name = "OP_DESTROY_SESSION",
1736                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1737         },
1738         [OP_SEQUENCE] = {
1739                 .op_func = (nfsd4op_func)nfsd4_sequence,
1740                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1741                 .op_name = "OP_SEQUENCE",
1742         },
1743         [OP_DESTROY_CLIENTID] = {
1744                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1745                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1746                                 | OP_MODIFIES_SOMETHING,
1747                 .op_name = "OP_DESTROY_CLIENTID",
1748                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1749         },
1750         [OP_RECLAIM_COMPLETE] = {
1751                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1752                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1753                 .op_name = "OP_RECLAIM_COMPLETE",
1754                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1755         },
1756         [OP_SECINFO_NO_NAME] = {
1757                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1758                 .op_flags = OP_HANDLES_WRONGSEC,
1759                 .op_name = "OP_SECINFO_NO_NAME",
1760         },
1761         [OP_TEST_STATEID] = {
1762                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1763                 .op_flags = ALLOWED_WITHOUT_FH,
1764                 .op_name = "OP_TEST_STATEID",
1765         },
1766         [OP_FREE_STATEID] = {
1767                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1768                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1769                 .op_name = "OP_FREE_STATEID",
1770                 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1771                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1772         },
1773 };
1774
1775 #ifdef NFSD_DEBUG
1776 static const char *nfsd4_op_name(unsigned opnum)
1777 {
1778         if (opnum < ARRAY_SIZE(nfsd4_ops))
1779                 return nfsd4_ops[opnum].op_name;
1780         return "unknown_operation";
1781 }
1782 #endif
1783
1784 #define nfsd4_voidres                   nfsd4_voidargs
1785 struct nfsd4_voidargs { int dummy; };
1786
1787 static struct svc_procedure             nfsd_procedures4[2] = {
1788         [NFSPROC4_NULL] = {
1789                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1790                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1791                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1792                 .pc_ressize = sizeof(struct nfsd4_voidres),
1793                 .pc_cachetype = RC_NOCACHE,
1794                 .pc_xdrressize = 1,
1795         },
1796         [NFSPROC4_COMPOUND] = {
1797                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1798                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1799                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1800                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1801                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1802                 .pc_release = nfsd4_release_compoundargs,
1803                 .pc_cachetype = RC_NOCACHE,
1804                 .pc_xdrressize = NFSD_BUFSIZE/4,
1805         },
1806 };
1807
1808 struct svc_version      nfsd_version4 = {
1809                 .vs_vers        = 4,
1810                 .vs_nproc       = 2,
1811                 .vs_proc        = nfsd_procedures4,
1812                 .vs_dispatch    = nfsd_dispatch,
1813                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1814 };
1815
1816 /*
1817  * Local variables:
1818  *  c-basic-offset: 8
1819  * End:
1820  */