[PATCH] knfsd: Prepare knfsd for support of rsize/wsize of up to 1MB, over TCP
[linux-2.6.git] / fs / nfsd / nfs4xdr.c
1 /*
2  *  fs/nfs/nfs4xdr.c
3  *
4  *  Server-side XDR for NFSv4
5  *
6  *  Copyright (c) 2002 The Regents of the University of Michigan.
7  *  All rights reserved.
8  *
9  *  Kendrick Smith <kmsmith@umich.edu>
10  *  Andy Adamson   <andros@umich.edu>
11  *
12  *  Redistribution and use in source and binary forms, with or without
13  *  modification, are permitted provided that the following conditions
14  *  are met:
15  *
16  *  1. Redistributions of source code must retain the above copyright
17  *     notice, this list of conditions and the following disclaimer.
18  *  2. Redistributions in binary form must reproduce the above copyright
19  *     notice, this list of conditions and the following disclaimer in the
20  *     documentation and/or other materials provided with the distribution.
21  *  3. Neither the name of the University nor the names of its
22  *     contributors may be used to endorse or promote products derived
23  *     from this software without specific prior written permission.
24  *
25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  *
37  * TODO: Neil Brown made the following observation:  We currently
38  * initially reserve NFSD_BUFSIZE space on the transmit queue and
39  * never release any of that until the request is complete.
40  * It would be good to calculate a new maximum response size while
41  * decoding the COMPOUND, and call svc_reserve with this number
42  * at the end of nfs4svc_decode_compoundargs.
43  */
44
45 #include <linux/param.h>
46 #include <linux/smp.h>
47 #include <linux/smp_lock.h>
48 #include <linux/fs.h>
49 #include <linux/namei.h>
50 #include <linux/vfs.h>
51 #include <linux/sunrpc/xdr.h>
52 #include <linux/sunrpc/svc.h>
53 #include <linux/sunrpc/clnt.h>
54 #include <linux/nfsd/nfsd.h>
55 #include <linux/nfsd/state.h>
56 #include <linux/nfsd/xdr4.h>
57 #include <linux/nfsd_idmap.h>
58 #include <linux/nfs4.h>
59 #include <linux/nfs4_acl.h>
60
61 #define NFSDDBG_FACILITY                NFSDDBG_XDR
62
63 static int
64 check_filename(char *str, int len, int err)
65 {
66         int i;
67
68         if (len == 0)
69                 return nfserr_inval;
70         if (isdotent(str, len))
71                 return err;
72         for (i = 0; i < len; i++)
73                 if (str[i] == '/')
74                         return err;
75         return 0;
76 }
77
78 /*
79  * START OF "GENERIC" DECODE ROUTINES.
80  *   These may look a little ugly since they are imported from a "generic"
81  * set of XDR encode/decode routines which are intended to be shared by
82  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
83  *
84  * If the pain of reading these is too great, it should be a straightforward
85  * task to translate them into Linux-specific versions which are more
86  * consistent with the style used in NFSv2/v3...
87  */
88 #define DECODE_HEAD                             \
89         u32 *p;                                 \
90         int status
91 #define DECODE_TAIL                             \
92         status = 0;                             \
93 out:                                            \
94         return status;                          \
95 xdr_error:                                      \
96         printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
97         status = nfserr_bad_xdr;                \
98         goto out
99
100 #define READ32(x)         (x) = ntohl(*p++)
101 #define READ64(x)         do {                  \
102         (x) = (u64)ntohl(*p++) << 32;           \
103         (x) |= ntohl(*p++);                     \
104 } while (0)
105 #define READTIME(x)       do {                  \
106         p++;                                    \
107         (x) = ntohl(*p++);                      \
108         p++;                                    \
109 } while (0)
110 #define READMEM(x,nbytes) do {                  \
111         x = (char *)p;                          \
112         p += XDR_QUADLEN(nbytes);               \
113 } while (0)
114 #define SAVEMEM(x,nbytes) do {                  \
115         if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116                 savemem(argp, p, nbytes) :      \
117                 (char *)p)) {                   \
118                 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
119                 goto xdr_error;                 \
120                 }                               \
121         p += XDR_QUADLEN(nbytes);               \
122 } while (0)
123 #define COPYMEM(x,nbytes) do {                  \
124         memcpy((x), p, nbytes);                 \
125         p += XDR_QUADLEN(nbytes);               \
126 } while (0)
127
128 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
129 #define READ_BUF(nbytes)  do {                  \
130         if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) {     \
131                 p = argp->p;                    \
132                 argp->p += XDR_QUADLEN(nbytes); \
133         } else if (!(p = read_buf(argp, nbytes))) { \
134                 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
135                 goto xdr_error;                 \
136         }                                       \
137 } while (0)
138
139 static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
140 {
141         /* We want more bytes than seem to be available.
142          * Maybe we need a new page, maybe we have just run out
143          */
144         int avail = (char*)argp->end - (char*)argp->p;
145         u32 *p;
146         if (avail + argp->pagelen < nbytes)
147                 return NULL;
148         if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
149                 return NULL;
150         /* ok, we can do it with the current plus the next page */
151         if (nbytes <= sizeof(argp->tmp))
152                 p = argp->tmp;
153         else {
154                 kfree(argp->tmpp);
155                 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
156                 if (!p)
157                         return NULL;
158                 
159         }
160         memcpy(p, argp->p, avail);
161         /* step to next page */
162         argp->p = page_address(argp->pagelist[0]);
163         argp->pagelist++;
164         if (argp->pagelen < PAGE_SIZE) {
165                 argp->end = p + (argp->pagelen>>2);
166                 argp->pagelen = 0;
167         } else {
168                 argp->end = p + (PAGE_SIZE>>2);
169                 argp->pagelen -= PAGE_SIZE;
170         }
171         memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172         argp->p += XDR_QUADLEN(nbytes - avail);
173         return p;
174 }
175
176 static int
177 defer_free(struct nfsd4_compoundargs *argp,
178                 void (*release)(const void *), void *p)
179 {
180         struct tmpbuf *tb;
181
182         tb = kmalloc(sizeof(*tb), GFP_KERNEL);
183         if (!tb)
184                 return -ENOMEM;
185         tb->buf = p;
186         tb->release = release;
187         tb->next = argp->to_free;
188         argp->to_free = tb;
189         return 0;
190 }
191
192 static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
193 {
194         void *new = NULL;
195         if (p == argp->tmp) {
196                 new = kmalloc(nbytes, GFP_KERNEL);
197                 if (!new) return NULL;
198                 p = new;
199                 memcpy(p, argp->tmp, nbytes);
200         } else {
201                 BUG_ON(p != argp->tmpp);
202                 argp->tmpp = NULL;
203         }
204         if (defer_free(argp, kfree, p)) {
205                 kfree(new);
206                 return NULL;
207         } else
208                 return (char *)p;
209 }
210
211
212 static int
213 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
214 {
215         u32 bmlen;
216         DECODE_HEAD;
217
218         bmval[0] = 0;
219         bmval[1] = 0;
220
221         READ_BUF(4);
222         READ32(bmlen);
223         if (bmlen > 1000)
224                 goto xdr_error;
225
226         READ_BUF(bmlen << 2);
227         if (bmlen > 0)
228                 READ32(bmval[0]);
229         if (bmlen > 1)
230                 READ32(bmval[1]);
231
232         DECODE_TAIL;
233 }
234
235 static int
236 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
237     struct nfs4_acl **acl)
238 {
239         int expected_len, len = 0;
240         u32 dummy32;
241         char *buf;
242
243         DECODE_HEAD;
244         iattr->ia_valid = 0;
245         if ((status = nfsd4_decode_bitmap(argp, bmval)))
246                 return status;
247
248         /*
249          * According to spec, unsupported attributes return ERR_NOTSUPP;
250          * read-only attributes return ERR_INVAL.
251          */
252         if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
253                 return nfserr_attrnotsupp;
254         if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
255                 return nfserr_inval;
256
257         READ_BUF(4);
258         READ32(expected_len);
259
260         if (bmval[0] & FATTR4_WORD0_SIZE) {
261                 READ_BUF(8);
262                 len += 8;
263                 READ64(iattr->ia_size);
264                 iattr->ia_valid |= ATTR_SIZE;
265         }
266         if (bmval[0] & FATTR4_WORD0_ACL) {
267                 int nace, i;
268                 struct nfs4_ace ace;
269
270                 READ_BUF(4); len += 4;
271                 READ32(nace);
272
273                 *acl = nfs4_acl_new();
274                 if (*acl == NULL) {
275                         status = -ENOMEM;
276                         goto out_nfserr;
277                 }
278                 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
279
280                 for (i = 0; i < nace; i++) {
281                         READ_BUF(16); len += 16;
282                         READ32(ace.type);
283                         READ32(ace.flag);
284                         READ32(ace.access_mask);
285                         READ32(dummy32);
286                         READ_BUF(dummy32);
287                         len += XDR_QUADLEN(dummy32) << 2;
288                         READMEM(buf, dummy32);
289                         ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
290                         status = 0;
291                         if (ace.whotype != NFS4_ACL_WHO_NAMED)
292                                 ace.who = 0;
293                         else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
294                                 status = nfsd_map_name_to_gid(argp->rqstp,
295                                                 buf, dummy32, &ace.who);
296                         else
297                                 status = nfsd_map_name_to_uid(argp->rqstp,
298                                                 buf, dummy32, &ace.who);
299                         if (status)
300                                 goto out_nfserr;
301                         status = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
302                                  ace.access_mask, ace.whotype, ace.who);
303                         if (status)
304                                 goto out_nfserr;
305                 }
306         } else
307                 *acl = NULL;
308         if (bmval[1] & FATTR4_WORD1_MODE) {
309                 READ_BUF(4);
310                 len += 4;
311                 READ32(iattr->ia_mode);
312                 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
313                 iattr->ia_valid |= ATTR_MODE;
314         }
315         if (bmval[1] & FATTR4_WORD1_OWNER) {
316                 READ_BUF(4);
317                 len += 4;
318                 READ32(dummy32);
319                 READ_BUF(dummy32);
320                 len += (XDR_QUADLEN(dummy32) << 2);
321                 READMEM(buf, dummy32);
322                 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
323                         goto out_nfserr;
324                 iattr->ia_valid |= ATTR_UID;
325         }
326         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
327                 READ_BUF(4);
328                 len += 4;
329                 READ32(dummy32);
330                 READ_BUF(dummy32);
331                 len += (XDR_QUADLEN(dummy32) << 2);
332                 READMEM(buf, dummy32);
333                 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
334                         goto out_nfserr;
335                 iattr->ia_valid |= ATTR_GID;
336         }
337         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
338                 READ_BUF(4);
339                 len += 4;
340                 READ32(dummy32);
341                 switch (dummy32) {
342                 case NFS4_SET_TO_CLIENT_TIME:
343                         /* We require the high 32 bits of 'seconds' to be 0, and we ignore
344                            all 32 bits of 'nseconds'. */
345                         READ_BUF(12);
346                         len += 12;
347                         READ32(dummy32);
348                         if (dummy32)
349                                 return nfserr_inval;
350                         READ32(iattr->ia_atime.tv_sec);
351                         READ32(iattr->ia_atime.tv_nsec);
352                         if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
353                                 return nfserr_inval;
354                         iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
355                         break;
356                 case NFS4_SET_TO_SERVER_TIME:
357                         iattr->ia_valid |= ATTR_ATIME;
358                         break;
359                 default:
360                         goto xdr_error;
361                 }
362         }
363         if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
364                 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
365                    all 32 bits of 'nseconds'. */
366                 READ_BUF(12);
367                 len += 12;
368                 READ32(dummy32);
369                 if (dummy32)
370                         return nfserr_inval;
371                 READ32(iattr->ia_ctime.tv_sec);
372                 READ32(iattr->ia_ctime.tv_nsec);
373                 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
374                         return nfserr_inval;
375                 iattr->ia_valid |= ATTR_CTIME;
376         }
377         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
378                 READ_BUF(4);
379                 len += 4;
380                 READ32(dummy32);
381                 switch (dummy32) {
382                 case NFS4_SET_TO_CLIENT_TIME:
383                         /* We require the high 32 bits of 'seconds' to be 0, and we ignore
384                            all 32 bits of 'nseconds'. */
385                         READ_BUF(12);
386                         len += 12;
387                         READ32(dummy32);
388                         if (dummy32)
389                                 return nfserr_inval;
390                         READ32(iattr->ia_mtime.tv_sec);
391                         READ32(iattr->ia_mtime.tv_nsec);
392                         if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
393                                 return nfserr_inval;
394                         iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
395                         break;
396                 case NFS4_SET_TO_SERVER_TIME:
397                         iattr->ia_valid |= ATTR_MTIME;
398                         break;
399                 default:
400                         goto xdr_error;
401                 }
402         }
403         if (len != expected_len)
404                 goto xdr_error;
405
406         DECODE_TAIL;
407
408 out_nfserr:
409         status = nfserrno(status);
410         goto out;
411 }
412
413 static int
414 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
415 {
416         DECODE_HEAD;
417
418         READ_BUF(4);
419         READ32(access->ac_req_access);
420
421         DECODE_TAIL;
422 }
423
424 static int
425 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
426 {
427         DECODE_HEAD;
428
429         close->cl_stateowner = NULL;
430         READ_BUF(4 + sizeof(stateid_t));
431         READ32(close->cl_seqid);
432         READ32(close->cl_stateid.si_generation);
433         COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
434
435         DECODE_TAIL;
436 }
437
438
439 static int
440 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
441 {
442         DECODE_HEAD;
443
444         READ_BUF(12);
445         READ64(commit->co_offset);
446         READ32(commit->co_count);
447
448         DECODE_TAIL;
449 }
450
451 static int
452 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
453 {
454         DECODE_HEAD;
455
456         READ_BUF(4);
457         READ32(create->cr_type);
458         switch (create->cr_type) {
459         case NF4LNK:
460                 READ_BUF(4);
461                 READ32(create->cr_linklen);
462                 READ_BUF(create->cr_linklen);
463                 SAVEMEM(create->cr_linkname, create->cr_linklen);
464                 break;
465         case NF4BLK:
466         case NF4CHR:
467                 READ_BUF(8);
468                 READ32(create->cr_specdata1);
469                 READ32(create->cr_specdata2);
470                 break;
471         case NF4SOCK:
472         case NF4FIFO:
473         case NF4DIR:
474         default:
475                 break;
476         }
477
478         READ_BUF(4);
479         READ32(create->cr_namelen);
480         READ_BUF(create->cr_namelen);
481         SAVEMEM(create->cr_name, create->cr_namelen);
482         if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
483                 return status;
484
485         if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
486                 goto out;
487
488         DECODE_TAIL;
489 }
490
491 static inline int
492 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
493 {
494         DECODE_HEAD;
495
496         READ_BUF(sizeof(stateid_t));
497         READ32(dr->dr_stateid.si_generation);
498         COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
499
500         DECODE_TAIL;
501 }
502
503 static inline int
504 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
505 {
506         return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
507 }
508
509 static int
510 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
511 {
512         DECODE_HEAD;
513
514         READ_BUF(4);
515         READ32(link->li_namelen);
516         READ_BUF(link->li_namelen);
517         SAVEMEM(link->li_name, link->li_namelen);
518         if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
519                 return status;
520
521         DECODE_TAIL;
522 }
523
524 static int
525 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
526 {
527         DECODE_HEAD;
528
529         lock->lk_replay_owner = NULL;
530         /*
531         * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
532         */
533         READ_BUF(28);
534         READ32(lock->lk_type);
535         if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
536                 goto xdr_error;
537         READ32(lock->lk_reclaim);
538         READ64(lock->lk_offset);
539         READ64(lock->lk_length);
540         READ32(lock->lk_is_new);
541
542         if (lock->lk_is_new) {
543                 READ_BUF(36);
544                 READ32(lock->lk_new_open_seqid);
545                 READ32(lock->lk_new_open_stateid.si_generation);
546
547                 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
548                 READ32(lock->lk_new_lock_seqid);
549                 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
550                 READ32(lock->lk_new_owner.len);
551                 READ_BUF(lock->lk_new_owner.len);
552                 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
553         } else {
554                 READ_BUF(20);
555                 READ32(lock->lk_old_lock_stateid.si_generation);
556                 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
557                 READ32(lock->lk_old_lock_seqid);
558         }
559
560         DECODE_TAIL;
561 }
562
563 static int
564 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
565 {
566         DECODE_HEAD;
567                         
568         READ_BUF(32);
569         READ32(lockt->lt_type);
570         if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
571                 goto xdr_error;
572         READ64(lockt->lt_offset);
573         READ64(lockt->lt_length);
574         COPYMEM(&lockt->lt_clientid, 8);
575         READ32(lockt->lt_owner.len);
576         READ_BUF(lockt->lt_owner.len);
577         READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
578
579         DECODE_TAIL;
580 }
581
582 static int
583 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
584 {
585         DECODE_HEAD;
586
587         locku->lu_stateowner = NULL;
588         READ_BUF(24 + sizeof(stateid_t));
589         READ32(locku->lu_type);
590         if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
591                 goto xdr_error;
592         READ32(locku->lu_seqid);
593         READ32(locku->lu_stateid.si_generation);
594         COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
595         READ64(locku->lu_offset);
596         READ64(locku->lu_length);
597
598         DECODE_TAIL;
599 }
600
601 static int
602 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
603 {
604         DECODE_HEAD;
605
606         READ_BUF(4);
607         READ32(lookup->lo_len);
608         READ_BUF(lookup->lo_len);
609         SAVEMEM(lookup->lo_name, lookup->lo_len);
610         if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
611                 return status;
612
613         DECODE_TAIL;
614 }
615
616 static int
617 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
618 {
619         DECODE_HEAD;
620
621         memset(open->op_bmval, 0, sizeof(open->op_bmval));
622         open->op_iattr.ia_valid = 0;
623         open->op_stateowner = NULL;
624
625         /* seqid, share_access, share_deny, clientid, ownerlen */
626         READ_BUF(16 + sizeof(clientid_t));
627         READ32(open->op_seqid);
628         READ32(open->op_share_access);
629         READ32(open->op_share_deny);
630         COPYMEM(&open->op_clientid, sizeof(clientid_t));
631         READ32(open->op_owner.len);
632
633         /* owner, open_flag */
634         READ_BUF(open->op_owner.len + 4);
635         SAVEMEM(open->op_owner.data, open->op_owner.len);
636         READ32(open->op_create);
637         switch (open->op_create) {
638         case NFS4_OPEN_NOCREATE:
639                 break;
640         case NFS4_OPEN_CREATE:
641                 READ_BUF(4);
642                 READ32(open->op_createmode);
643                 switch (open->op_createmode) {
644                 case NFS4_CREATE_UNCHECKED:
645                 case NFS4_CREATE_GUARDED:
646                         if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
647                                 goto out;
648                         break;
649                 case NFS4_CREATE_EXCLUSIVE:
650                         READ_BUF(8);
651                         COPYMEM(open->op_verf.data, 8);
652                         break;
653                 default:
654                         goto xdr_error;
655                 }
656                 break;
657         default:
658                 goto xdr_error;
659         }
660
661         /* open_claim */
662         READ_BUF(4);
663         READ32(open->op_claim_type);
664         switch (open->op_claim_type) {
665         case NFS4_OPEN_CLAIM_NULL:
666         case NFS4_OPEN_CLAIM_DELEGATE_PREV:
667                 READ_BUF(4);
668                 READ32(open->op_fname.len);
669                 READ_BUF(open->op_fname.len);
670                 SAVEMEM(open->op_fname.data, open->op_fname.len);
671                 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
672                         return status;
673                 break;
674         case NFS4_OPEN_CLAIM_PREVIOUS:
675                 READ_BUF(4);
676                 READ32(open->op_delegate_type);
677                 break;
678         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
679                 READ_BUF(sizeof(stateid_t) + 4);
680                 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
681                 READ32(open->op_fname.len);
682                 READ_BUF(open->op_fname.len);
683                 SAVEMEM(open->op_fname.data, open->op_fname.len);
684                 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
685                         return status;
686                 break;
687         default:
688                 goto xdr_error;
689         }
690
691         DECODE_TAIL;
692 }
693
694 static int
695 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
696 {
697         DECODE_HEAD;
698                     
699         open_conf->oc_stateowner = NULL;
700         READ_BUF(4 + sizeof(stateid_t));
701         READ32(open_conf->oc_req_stateid.si_generation);
702         COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
703         READ32(open_conf->oc_seqid);
704                                                         
705         DECODE_TAIL;
706 }
707
708 static int
709 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
710 {
711         DECODE_HEAD;
712                     
713         open_down->od_stateowner = NULL;
714         READ_BUF(12 + sizeof(stateid_t));
715         READ32(open_down->od_stateid.si_generation);
716         COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
717         READ32(open_down->od_seqid);
718         READ32(open_down->od_share_access);
719         READ32(open_down->od_share_deny);
720                                                         
721         DECODE_TAIL;
722 }
723
724 static int
725 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
726 {
727         DECODE_HEAD;
728
729         READ_BUF(4);
730         READ32(putfh->pf_fhlen);
731         if (putfh->pf_fhlen > NFS4_FHSIZE)
732                 goto xdr_error;
733         READ_BUF(putfh->pf_fhlen);
734         SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
735
736         DECODE_TAIL;
737 }
738
739 static int
740 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
741 {
742         DECODE_HEAD;
743
744         READ_BUF(sizeof(stateid_t) + 12);
745         READ32(read->rd_stateid.si_generation);
746         COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
747         READ64(read->rd_offset);
748         READ32(read->rd_length);
749
750         DECODE_TAIL;
751 }
752
753 static int
754 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
755 {
756         DECODE_HEAD;
757
758         READ_BUF(24);
759         READ64(readdir->rd_cookie);
760         COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
761         READ32(readdir->rd_dircount);    /* just in case you needed a useless field... */
762         READ32(readdir->rd_maxcount);
763         if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
764                 goto out;
765
766         DECODE_TAIL;
767 }
768
769 static int
770 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
771 {
772         DECODE_HEAD;
773
774         READ_BUF(4);
775         READ32(remove->rm_namelen);
776         READ_BUF(remove->rm_namelen);
777         SAVEMEM(remove->rm_name, remove->rm_namelen);
778         if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
779                 return status;
780
781         DECODE_TAIL;
782 }
783
784 static int
785 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
786 {
787         DECODE_HEAD;
788
789         READ_BUF(4);
790         READ32(rename->rn_snamelen);
791         READ_BUF(rename->rn_snamelen + 4);
792         SAVEMEM(rename->rn_sname, rename->rn_snamelen);
793         READ32(rename->rn_tnamelen);
794         READ_BUF(rename->rn_tnamelen);
795         SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
796         if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
797                 return status;
798         if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
799                 return status;
800
801         DECODE_TAIL;
802 }
803
804 static int
805 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
806 {
807         DECODE_HEAD;
808
809         READ_BUF(sizeof(clientid_t));
810         COPYMEM(clientid, sizeof(clientid_t));
811
812         DECODE_TAIL;
813 }
814
815 static int
816 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
817 {
818         DECODE_HEAD;
819
820         READ_BUF(sizeof(stateid_t));
821         READ32(setattr->sa_stateid.si_generation);
822         COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
823         if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
824                 goto out;
825
826         DECODE_TAIL;
827 }
828
829 static int
830 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
831 {
832         DECODE_HEAD;
833
834         READ_BUF(12);
835         COPYMEM(setclientid->se_verf.data, 8);
836         READ32(setclientid->se_namelen);
837
838         READ_BUF(setclientid->se_namelen + 8);
839         SAVEMEM(setclientid->se_name, setclientid->se_namelen);
840         READ32(setclientid->se_callback_prog);
841         READ32(setclientid->se_callback_netid_len);
842
843         READ_BUF(setclientid->se_callback_netid_len + 4);
844         SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
845         READ32(setclientid->se_callback_addr_len);
846
847         READ_BUF(setclientid->se_callback_addr_len + 4);
848         SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
849         READ32(setclientid->se_callback_ident);
850
851         DECODE_TAIL;
852 }
853
854 static int
855 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
856 {
857         DECODE_HEAD;
858
859         READ_BUF(8 + sizeof(nfs4_verifier));
860         COPYMEM(&scd_c->sc_clientid, 8);
861         COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
862
863         DECODE_TAIL;
864 }
865
866 /* Also used for NVERIFY */
867 static int
868 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
869 {
870 #if 0
871         struct nfsd4_compoundargs save = {
872                 .p = argp->p,
873                 .end = argp->end,
874                 .rqstp = argp->rqstp,
875         };
876         u32             ve_bmval[2];
877         struct iattr    ve_iattr;           /* request */
878         struct nfs4_acl *ve_acl;            /* request */
879 #endif
880         DECODE_HEAD;
881
882         if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
883                 goto out;
884
885         /* For convenience's sake, we compare raw xdr'd attributes in
886          * nfsd4_proc_verify; however we still decode here just to return
887          * correct error in case of bad xdr. */
888 #if 0
889         status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
890         if (status == nfserr_inval) {
891                 status = nfserrno(status);
892                 goto out;
893         }
894 #endif
895         READ_BUF(4);
896         READ32(verify->ve_attrlen);
897         READ_BUF(verify->ve_attrlen);
898         SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
899
900         DECODE_TAIL;
901 }
902
903 static int
904 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
905 {
906         int avail;
907         int v;
908         int len;
909         DECODE_HEAD;
910
911         READ_BUF(sizeof(stateid_opaque_t) + 20);
912         READ32(write->wr_stateid.si_generation);
913         COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
914         READ64(write->wr_offset);
915         READ32(write->wr_stable_how);
916         if (write->wr_stable_how > 2)
917                 goto xdr_error;
918         READ32(write->wr_buflen);
919
920         /* Sorry .. no magic macros for this.. *
921          * READ_BUF(write->wr_buflen);
922          * SAVEMEM(write->wr_buf, write->wr_buflen);
923          */
924         avail = (char*)argp->end - (char*)argp->p;
925         if (avail + argp->pagelen < write->wr_buflen) {
926                 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); 
927                 goto xdr_error;
928         }
929         argp->rqstp->rq_vec[0].iov_base = p;
930         argp->rqstp->rq_vec[0].iov_len = avail;
931         v = 0;
932         len = write->wr_buflen;
933         while (len > argp->rqstp->rq_vec[v].iov_len) {
934                 len -= argp->rqstp->rq_vec[v].iov_len;
935                 v++;
936                 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
937                 argp->pagelist++;
938                 if (argp->pagelen >= PAGE_SIZE) {
939                         argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
940                         argp->pagelen -= PAGE_SIZE;
941                 } else {
942                         argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
943                         argp->pagelen -= len;
944                 }
945         }
946         argp->end = (u32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
947         argp->p = (u32*)  (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
948         argp->rqstp->rq_vec[v].iov_len = len;
949         write->wr_vlen = v+1;
950
951         DECODE_TAIL;
952 }
953
954 static int
955 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
956 {
957         DECODE_HEAD;
958
959         READ_BUF(12);
960         COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
961         READ32(rlockowner->rl_owner.len);
962         READ_BUF(rlockowner->rl_owner.len);
963         READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
964
965         DECODE_TAIL;
966 }
967
968 static int
969 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
970 {
971         DECODE_HEAD;
972         struct nfsd4_op *op;
973         int i;
974
975         /*
976          * XXX: According to spec, we should check the tag
977          * for UTF-8 compliance.  I'm postponing this for
978          * now because it seems that some clients do use
979          * binary tags.
980          */
981         READ_BUF(4);
982         READ32(argp->taglen);
983         READ_BUF(argp->taglen + 8);
984         SAVEMEM(argp->tag, argp->taglen);
985         READ32(argp->minorversion);
986         READ32(argp->opcnt);
987
988         if (argp->taglen > NFSD4_MAX_TAGLEN)
989                 goto xdr_error;
990         if (argp->opcnt > 100)
991                 goto xdr_error;
992
993         if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
994                 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
995                 if (!argp->ops) {
996                         argp->ops = argp->iops;
997                         printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
998                         goto xdr_error;
999                 }
1000         }
1001
1002         for (i = 0; i < argp->opcnt; i++) {
1003                 op = &argp->ops[i];
1004                 op->replay = NULL;
1005
1006                 /*
1007                  * We can't use READ_BUF() here because we need to handle
1008                  * a missing opcode as an OP_WRITE + 1. So we need to check
1009                  * to see if we're truly at the end of our buffer or if there
1010                  * is another page we need to flip to.
1011                  */
1012
1013                 if (argp->p == argp->end) {
1014                         if (argp->pagelen < 4) {
1015                                 /* There isn't an opcode still on the wire */
1016                                 op->opnum = OP_WRITE + 1;
1017                                 op->status = nfserr_bad_xdr;
1018                                 argp->opcnt = i+1;
1019                                 break;
1020                         }
1021
1022                         /*
1023                          * False alarm. We just hit a page boundary, but there
1024                          * is still data available.  Move pointer across page
1025                          * boundary.  *snip from READ_BUF*
1026                          */
1027                         argp->p = page_address(argp->pagelist[0]);
1028                         argp->pagelist++;
1029                         if (argp->pagelen < PAGE_SIZE) {
1030                                 argp->end = p + (argp->pagelen>>2);
1031                                 argp->pagelen = 0;
1032                         } else {
1033                                 argp->end = p + (PAGE_SIZE>>2);
1034                                 argp->pagelen -= PAGE_SIZE;
1035                         }
1036                 }
1037                 op->opnum = ntohl(*argp->p++);
1038
1039                 switch (op->opnum) {
1040                 case 2: /* Reserved operation */
1041                         op->opnum = OP_ILLEGAL;
1042                         if (argp->minorversion == 0)
1043                                 op->status = nfserr_op_illegal;
1044                         else
1045                                 op->status = nfserr_minor_vers_mismatch;
1046                         break;
1047                 case OP_ACCESS:
1048                         op->status = nfsd4_decode_access(argp, &op->u.access);
1049                         break;
1050                 case OP_CLOSE:
1051                         op->status = nfsd4_decode_close(argp, &op->u.close);
1052                         break;
1053                 case OP_COMMIT:
1054                         op->status = nfsd4_decode_commit(argp, &op->u.commit);
1055                         break;
1056                 case OP_CREATE:
1057                         op->status = nfsd4_decode_create(argp, &op->u.create);
1058                         break;
1059                 case OP_DELEGRETURN:
1060                         op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1061                         break;
1062                 case OP_GETATTR:
1063                         op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1064                         break;
1065                 case OP_GETFH:
1066                         op->status = nfs_ok;
1067                         break;
1068                 case OP_LINK:
1069                         op->status = nfsd4_decode_link(argp, &op->u.link);
1070                         break;
1071                 case OP_LOCK:
1072                         op->status = nfsd4_decode_lock(argp, &op->u.lock);
1073                         break;
1074                 case OP_LOCKT:
1075                         op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1076                         break;
1077                 case OP_LOCKU:
1078                         op->status = nfsd4_decode_locku(argp, &op->u.locku);
1079                         break;
1080                 case OP_LOOKUP:
1081                         op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1082                         break;
1083                 case OP_LOOKUPP:
1084                         op->status = nfs_ok;
1085                         break;
1086                 case OP_NVERIFY:
1087                         op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1088                         break;
1089                 case OP_OPEN:
1090                         op->status = nfsd4_decode_open(argp, &op->u.open);
1091                         break;
1092                 case OP_OPEN_CONFIRM:
1093                         op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1094                         break;
1095                 case OP_OPEN_DOWNGRADE:
1096                         op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1097                         break;
1098                 case OP_PUTFH:
1099                         op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1100                         break;
1101                 case OP_PUTROOTFH:
1102                         op->status = nfs_ok;
1103                         break;
1104                 case OP_READ:
1105                         op->status = nfsd4_decode_read(argp, &op->u.read);
1106                         break;
1107                 case OP_READDIR:
1108                         op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1109                         break;
1110                 case OP_READLINK:
1111                         op->status = nfs_ok;
1112                         break;
1113                 case OP_REMOVE:
1114                         op->status = nfsd4_decode_remove(argp, &op->u.remove);
1115                         break;
1116                 case OP_RENAME:
1117                         op->status = nfsd4_decode_rename(argp, &op->u.rename);
1118                         break;
1119                 case OP_RESTOREFH:
1120                         op->status = nfs_ok;
1121                         break;
1122                 case OP_RENEW:
1123                         op->status = nfsd4_decode_renew(argp, &op->u.renew);
1124                         break;
1125                 case OP_SAVEFH:
1126                         op->status = nfs_ok;
1127                         break;
1128                 case OP_SETATTR:
1129                         op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1130                         break;
1131                 case OP_SETCLIENTID:
1132                         op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1133                         break;
1134                 case OP_SETCLIENTID_CONFIRM:
1135                         op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1136                         break;
1137                 case OP_VERIFY:
1138                         op->status = nfsd4_decode_verify(argp, &op->u.verify);
1139                         break;
1140                 case OP_WRITE:
1141                         op->status = nfsd4_decode_write(argp, &op->u.write);
1142                         break;
1143                 case OP_RELEASE_LOCKOWNER:
1144                         op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1145                         break;
1146                 default:
1147                         op->opnum = OP_ILLEGAL;
1148                         op->status = nfserr_op_illegal;
1149                         break;
1150                 }
1151
1152                 if (op->status) {
1153                         argp->opcnt = i+1;
1154                         break;
1155                 }
1156         }
1157
1158         DECODE_TAIL;
1159 }
1160 /*
1161  * END OF "GENERIC" DECODE ROUTINES.
1162  */
1163
1164 /*
1165  * START OF "GENERIC" ENCODE ROUTINES.
1166  *   These may look a little ugly since they are imported from a "generic"
1167  * set of XDR encode/decode routines which are intended to be shared by
1168  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1169  *
1170  * If the pain of reading these is too great, it should be a straightforward
1171  * task to translate them into Linux-specific versions which are more
1172  * consistent with the style used in NFSv2/v3...
1173  */
1174 #define ENCODE_HEAD              u32 *p
1175
1176 #define WRITE32(n)               *p++ = htonl(n)
1177 #define WRITE64(n)               do {                           \
1178         *p++ = htonl((u32)((n) >> 32));                         \
1179         *p++ = htonl((u32)(n));                                 \
1180 } while (0)
1181 #define WRITEMEM(ptr,nbytes)     do {                           \
1182         *(p + XDR_QUADLEN(nbytes) -1) = 0;                      \
1183         memcpy(p, ptr, nbytes);                                 \
1184         p += XDR_QUADLEN(nbytes);                               \
1185 } while (0)
1186 #define WRITECINFO(c)           do {                            \
1187         *p++ = htonl(c.atomic);                                 \
1188         *p++ = htonl(c.before_ctime_sec);                               \
1189         *p++ = htonl(c.before_ctime_nsec);                              \
1190         *p++ = htonl(c.after_ctime_sec);                                \
1191         *p++ = htonl(c.after_ctime_nsec);                               \
1192 } while (0)
1193
1194 #define RESERVE_SPACE(nbytes)   do {                            \
1195         p = resp->p;                                            \
1196         BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end);            \
1197 } while (0)
1198 #define ADJUST_ARGS()           resp->p = p
1199
1200 /*
1201  * Header routine to setup seqid operation replay cache
1202  */
1203 #define ENCODE_SEQID_OP_HEAD                                    \
1204         u32 *p;                                                 \
1205         u32 *save;                                              \
1206                                                                 \
1207         save = resp->p;
1208
1209 /*
1210  * Routine for encoding the result of a "seqid-mutating" NFSv4 operation.  This
1211  * is where sequence id's are incremented, and the replay cache is filled.
1212  * Note that we increment sequence id's here, at the last moment, so we're sure
1213  * we know whether the error to be returned is a sequence id mutating error.
1214  */
1215
1216 #define ENCODE_SEQID_OP_TAIL(stateowner) do {                   \
1217         if (seqid_mutating_err(nfserr) && stateowner) {         \
1218                 stateowner->so_seqid++;                         \
1219                 stateowner->so_replay.rp_status = nfserr;       \
1220                 stateowner->so_replay.rp_buflen =               \
1221                           (((char *)(resp)->p - (char *)save)); \
1222                 memcpy(stateowner->so_replay.rp_buf, save,      \
1223                         stateowner->so_replay.rp_buflen);       \
1224         } } while (0);
1225
1226
1227 static u32 nfs4_ftypes[16] = {
1228         NF4BAD,  NF4FIFO, NF4CHR, NF4BAD,
1229         NF4DIR,  NF4BAD,  NF4BLK, NF4BAD,
1230         NF4REG,  NF4BAD,  NF4LNK, NF4BAD,
1231         NF4SOCK, NF4BAD,  NF4LNK, NF4BAD,
1232 };
1233
1234 static int
1235 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1236                         u32 **p, int *buflen)
1237 {
1238         int status;
1239
1240         if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1241                 return nfserr_resource;
1242         if (whotype != NFS4_ACL_WHO_NAMED)
1243                 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1244         else if (group)
1245                 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1246         else
1247                 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1248         if (status < 0)
1249                 return nfserrno(status);
1250         *p = xdr_encode_opaque(*p, NULL, status);
1251         *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1252         BUG_ON(*buflen < 0);
1253         return 0;
1254 }
1255
1256 static inline int
1257 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1258 {
1259         return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1260 }
1261
1262 static inline int
1263 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1264 {
1265         return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1266 }
1267
1268 static inline int
1269 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1270                 u32 **p, int *buflen)
1271 {
1272         return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1273 }
1274
1275
1276 /*
1277  * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1278  * ourselves.
1279  *
1280  * @countp is the buffer size in _words_; upon successful return this becomes
1281  * replaced with the number of words written.
1282  */
1283 int
1284 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1285                 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1286                 struct svc_rqst *rqstp)
1287 {
1288         u32 bmval0 = bmval[0];
1289         u32 bmval1 = bmval[1];
1290         struct kstat stat;
1291         struct svc_fh tempfh;
1292         struct kstatfs statfs;
1293         int buflen = *countp << 2;
1294         u32 *attrlenp;
1295         u32 dummy;
1296         u64 dummy64;
1297         u32 *p = buffer;
1298         int status;
1299         int aclsupport = 0;
1300         struct nfs4_acl *acl = NULL;
1301
1302         BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1303         BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1304         BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1305
1306         status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1307         if (status)
1308                 goto out_nfserr;
1309         if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1310             (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1311                        FATTR4_WORD1_SPACE_TOTAL))) {
1312                 status = vfs_statfs(dentry, &statfs);
1313                 if (status)
1314                         goto out_nfserr;
1315         }
1316         if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1317                 fh_init(&tempfh, NFS4_FHSIZE);
1318                 status = fh_compose(&tempfh, exp, dentry, NULL);
1319                 if (status)
1320                         goto out;
1321                 fhp = &tempfh;
1322         }
1323         if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1324                         | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1325                 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1326                 aclsupport = (status == 0);
1327                 if (bmval0 & FATTR4_WORD0_ACL) {
1328                         if (status == -EOPNOTSUPP)
1329                                 bmval0 &= ~FATTR4_WORD0_ACL;
1330                         else if (status == -EINVAL) {
1331                                 status = nfserr_attrnotsupp;
1332                                 goto out;
1333                         } else if (status != 0)
1334                                 goto out_nfserr;
1335                 }
1336         }
1337         if ((buflen -= 16) < 0)
1338                 goto out_resource;
1339
1340         WRITE32(2);
1341         WRITE32(bmval0);
1342         WRITE32(bmval1);
1343         attrlenp = p++;                /* to be backfilled later */
1344
1345         if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1346                 if ((buflen -= 12) < 0)
1347                         goto out_resource;
1348                 WRITE32(2);
1349                 WRITE32(aclsupport ?
1350                         NFSD_SUPPORTED_ATTRS_WORD0 :
1351                         NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1352                 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1353         }
1354         if (bmval0 & FATTR4_WORD0_TYPE) {
1355                 if ((buflen -= 4) < 0)
1356                         goto out_resource;
1357                 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1358                 if (dummy == NF4BAD)
1359                         goto out_serverfault;
1360                 WRITE32(dummy);
1361         }
1362         if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1363                 if ((buflen -= 4) < 0)
1364                         goto out_resource;
1365                 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1366                         WRITE32(NFS4_FH_PERSISTENT);
1367                 else
1368                         WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1369         }
1370         if (bmval0 & FATTR4_WORD0_CHANGE) {
1371                 /*
1372                  * Note: This _must_ be consistent with the scheme for writing
1373                  * change_info, so any changes made here must be reflected there
1374                  * as well.  (See xdr4.h:set_change_info() and the WRITECINFO()
1375                  * macro above.)
1376                  */
1377                 if ((buflen -= 8) < 0)
1378                         goto out_resource;
1379                 WRITE32(stat.ctime.tv_sec);
1380                 WRITE32(stat.ctime.tv_nsec);
1381         }
1382         if (bmval0 & FATTR4_WORD0_SIZE) {
1383                 if ((buflen -= 8) < 0)
1384                         goto out_resource;
1385                 WRITE64(stat.size);
1386         }
1387         if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1388                 if ((buflen -= 4) < 0)
1389                         goto out_resource;
1390                 WRITE32(1);
1391         }
1392         if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1393                 if ((buflen -= 4) < 0)
1394                         goto out_resource;
1395                 WRITE32(1);
1396         }
1397         if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1398                 if ((buflen -= 4) < 0)
1399                         goto out_resource;
1400                 WRITE32(0);
1401         }
1402         if (bmval0 & FATTR4_WORD0_FSID) {
1403                 if ((buflen -= 16) < 0)
1404                         goto out_resource;
1405                 if (is_fsid(fhp, rqstp->rq_reffh)) {
1406                         WRITE64((u64)exp->ex_fsid);
1407                         WRITE64((u64)0);
1408                 } else {
1409                         WRITE32(0);
1410                         WRITE32(MAJOR(stat.dev));
1411                         WRITE32(0);
1412                         WRITE32(MINOR(stat.dev));
1413                 }
1414         }
1415         if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1416                 if ((buflen -= 4) < 0)
1417                         goto out_resource;
1418                 WRITE32(0);
1419         }
1420         if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1421                 if ((buflen -= 4) < 0)
1422                         goto out_resource;
1423                 WRITE32(NFSD_LEASE_TIME);
1424         }
1425         if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1426                 if ((buflen -= 4) < 0)
1427                         goto out_resource;
1428                 WRITE32(0);
1429         }
1430         if (bmval0 & FATTR4_WORD0_ACL) {
1431                 struct nfs4_ace *ace;
1432                 struct list_head *h;
1433
1434                 if (acl == NULL) {
1435                         if ((buflen -= 4) < 0)
1436                                 goto out_resource;
1437
1438                         WRITE32(0);
1439                         goto out_acl;
1440                 }
1441                 if ((buflen -= 4) < 0)
1442                         goto out_resource;
1443                 WRITE32(acl->naces);
1444
1445                 list_for_each(h, &acl->ace_head) {
1446                         ace = list_entry(h, struct nfs4_ace, l_ace);
1447
1448                         if ((buflen -= 4*3) < 0)
1449                                 goto out_resource;
1450                         WRITE32(ace->type);
1451                         WRITE32(ace->flag);
1452                         WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1453                         status = nfsd4_encode_aclname(rqstp, ace->whotype,
1454                                 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1455                                 &p, &buflen);
1456                         if (status == nfserr_resource)
1457                                 goto out_resource;
1458                         if (status)
1459                                 goto out;
1460                 }
1461         }
1462 out_acl:
1463         if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1464                 if ((buflen -= 4) < 0)
1465                         goto out_resource;
1466                 WRITE32(aclsupport ?
1467                         ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1468         }
1469         if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1470                 if ((buflen -= 4) < 0)
1471                         goto out_resource;
1472                 WRITE32(1);
1473         }
1474         if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1475                 if ((buflen -= 4) < 0)
1476                         goto out_resource;
1477                 WRITE32(1);
1478         }
1479         if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1480                 if ((buflen -= 4) < 0)
1481                         goto out_resource;
1482                 WRITE32(1);
1483         }
1484         if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1485                 if ((buflen -= 4) < 0)
1486                         goto out_resource;
1487                 WRITE32(1);
1488         }
1489         if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1490                 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1491                 if (buflen < 0)
1492                         goto out_resource;
1493                 WRITE32(fhp->fh_handle.fh_size);
1494                 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1495         }
1496         if (bmval0 & FATTR4_WORD0_FILEID) {
1497                 if ((buflen -= 8) < 0)
1498                         goto out_resource;
1499                 WRITE64((u64) stat.ino);
1500         }
1501         if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1502                 if ((buflen -= 8) < 0)
1503                         goto out_resource;
1504                 WRITE64((u64) statfs.f_ffree);
1505         }
1506         if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1507                 if ((buflen -= 8) < 0)
1508                         goto out_resource;
1509                 WRITE64((u64) statfs.f_ffree);
1510         }
1511         if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1512                 if ((buflen -= 8) < 0)
1513                         goto out_resource;
1514                 WRITE64((u64) statfs.f_files);
1515         }
1516         if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1517                 if ((buflen -= 4) < 0)
1518                         goto out_resource;
1519                 WRITE32(1);
1520         }
1521         if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1522                 if ((buflen -= 8) < 0)
1523                         goto out_resource;
1524                 WRITE64(~(u64)0);
1525         }
1526         if (bmval0 & FATTR4_WORD0_MAXLINK) {
1527                 if ((buflen -= 4) < 0)
1528                         goto out_resource;
1529                 WRITE32(255);
1530         }
1531         if (bmval0 & FATTR4_WORD0_MAXNAME) {
1532                 if ((buflen -= 4) < 0)
1533                         goto out_resource;
1534                 WRITE32(~(u32) 0);
1535         }
1536         if (bmval0 & FATTR4_WORD0_MAXREAD) {
1537                 if ((buflen -= 8) < 0)
1538                         goto out_resource;
1539                 WRITE64((u64) svc_max_payload(rqstp));
1540         }
1541         if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1542                 if ((buflen -= 8) < 0)
1543                         goto out_resource;
1544                 WRITE64((u64) svc_max_payload(rqstp));
1545         }
1546         if (bmval1 & FATTR4_WORD1_MODE) {
1547                 if ((buflen -= 4) < 0)
1548                         goto out_resource;
1549                 WRITE32(stat.mode & S_IALLUGO);
1550         }
1551         if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1552                 if ((buflen -= 4) < 0)
1553                         goto out_resource;
1554                 WRITE32(1);
1555         }
1556         if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1557                 if ((buflen -= 4) < 0)
1558                         goto out_resource;
1559                 WRITE32(stat.nlink);
1560         }
1561         if (bmval1 & FATTR4_WORD1_OWNER) {
1562                 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1563                 if (status == nfserr_resource)
1564                         goto out_resource;
1565                 if (status)
1566                         goto out;
1567         }
1568         if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1569                 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1570                 if (status == nfserr_resource)
1571                         goto out_resource;
1572                 if (status)
1573                         goto out;
1574         }
1575         if (bmval1 & FATTR4_WORD1_RAWDEV) {
1576                 if ((buflen -= 8) < 0)
1577                         goto out_resource;
1578                 WRITE32((u32) MAJOR(stat.rdev));
1579                 WRITE32((u32) MINOR(stat.rdev));
1580         }
1581         if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1582                 if ((buflen -= 8) < 0)
1583                         goto out_resource;
1584                 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1585                 WRITE64(dummy64);
1586         }
1587         if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1588                 if ((buflen -= 8) < 0)
1589                         goto out_resource;
1590                 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1591                 WRITE64(dummy64);
1592         }
1593         if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1594                 if ((buflen -= 8) < 0)
1595                         goto out_resource;
1596                 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1597                 WRITE64(dummy64);
1598         }
1599         if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1600                 if ((buflen -= 8) < 0)
1601                         goto out_resource;
1602                 dummy64 = (u64)stat.blocks << 9;
1603                 WRITE64(dummy64);
1604         }
1605         if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1606                 if ((buflen -= 12) < 0)
1607                         goto out_resource;
1608                 WRITE32(0);
1609                 WRITE32(stat.atime.tv_sec);
1610                 WRITE32(stat.atime.tv_nsec);
1611         }
1612         if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1613                 if ((buflen -= 12) < 0)
1614                         goto out_resource;
1615                 WRITE32(0);
1616                 WRITE32(1);
1617                 WRITE32(0);
1618         }
1619         if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1620                 if ((buflen -= 12) < 0)
1621                         goto out_resource;
1622                 WRITE32(0);
1623                 WRITE32(stat.ctime.tv_sec);
1624                 WRITE32(stat.ctime.tv_nsec);
1625         }
1626         if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1627                 if ((buflen -= 12) < 0)
1628                         goto out_resource;
1629                 WRITE32(0);
1630                 WRITE32(stat.mtime.tv_sec);
1631                 WRITE32(stat.mtime.tv_nsec);
1632         }
1633         if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1634                 struct dentry *mnt_pnt, *mnt_root;
1635
1636                 if ((buflen -= 8) < 0)
1637                         goto out_resource;
1638                 mnt_root = exp->ex_mnt->mnt_root;
1639                 if (mnt_root->d_inode == dentry->d_inode) {
1640                         mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1641                         WRITE64((u64) mnt_pnt->d_inode->i_ino);
1642                 } else
1643                         WRITE64((u64) stat.ino);
1644         }
1645         *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1646         *countp = p - buffer;
1647         status = nfs_ok;
1648
1649 out:
1650         nfs4_acl_free(acl);
1651         if (fhp == &tempfh)
1652                 fh_put(&tempfh);
1653         return status;
1654 out_nfserr:
1655         status = nfserrno(status);
1656         goto out;
1657 out_resource:
1658         *countp = 0;
1659         status = nfserr_resource;
1660         goto out;
1661 out_serverfault:
1662         status = nfserr_serverfault;
1663         goto out;
1664 }
1665
1666 static int
1667 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1668                 const char *name, int namlen, u32 *p, int *buflen)
1669 {
1670         struct svc_export *exp = cd->rd_fhp->fh_export;
1671         struct dentry *dentry;
1672         int nfserr;
1673
1674         dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1675         if (IS_ERR(dentry))
1676                 return nfserrno(PTR_ERR(dentry));
1677
1678         exp_get(exp);
1679         if (d_mountpoint(dentry)) {
1680                 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1681                 /*
1682                  * -EAGAIN is the only error returned from
1683                  * nfsd_cross_mnt() and it indicates that an
1684                  * up-call has  been initiated to fill in the export
1685                  * options on exp.  When the answer comes back,
1686                  * this call will be retried.
1687                  */
1688                         nfserr = nfserr_dropit;
1689                         goto out_put;
1690                 }
1691
1692         }
1693         nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1694                                         cd->rd_rqstp);
1695 out_put:
1696         dput(dentry);
1697         exp_put(exp);
1698         return nfserr;
1699 }
1700
1701 static u32 *
1702 nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1703 {
1704         u32 *attrlenp;
1705
1706         if (buflen < 6)
1707                 return NULL;
1708         *p++ = htonl(2);
1709         *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1710         *p++ = htonl(0);                         /* bmval1 */
1711
1712         attrlenp = p++;
1713         *p++ = nfserr;       /* no htonl */
1714         *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1715         return p;
1716 }
1717
1718 static int
1719 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1720                     loff_t offset, ino_t ino, unsigned int d_type)
1721 {
1722         struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1723         int buflen;
1724         u32 *p = cd->buffer;
1725         int nfserr = nfserr_toosmall;
1726
1727         /* In nfsv4, "." and ".." never make it onto the wire.. */
1728         if (name && isdotent(name, namlen)) {
1729                 cd->common.err = nfs_ok;
1730                 return 0;
1731         }
1732
1733         if (cd->offset)
1734                 xdr_encode_hyper(cd->offset, (u64) offset);
1735
1736         buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1737         if (buflen < 0)
1738                 goto fail;
1739
1740         *p++ = xdr_one;                             /* mark entry present */
1741         cd->offset = p;                             /* remember pointer */
1742         p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
1743         p = xdr_encode_array(p, name, namlen);      /* name length & name */
1744
1745         nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1746         switch (nfserr) {
1747         case nfs_ok:
1748                 p += buflen;
1749                 break;
1750         case nfserr_resource:
1751                 nfserr = nfserr_toosmall;
1752                 goto fail;
1753         case nfserr_dropit:
1754                 goto fail;
1755         default:
1756                 /*
1757                  * If the client requested the RDATTR_ERROR attribute,
1758                  * we stuff the error code into this attribute
1759                  * and continue.  If this attribute was not requested,
1760                  * then in accordance with the spec, we fail the
1761                  * entire READDIR operation(!)
1762                  */
1763                 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1764                         goto fail;
1765                 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1766                 if (p == NULL) {
1767                         nfserr = nfserr_toosmall;
1768                         goto fail;
1769                 }
1770         }
1771         cd->buflen -= (p - cd->buffer);
1772         cd->buffer = p;
1773         cd->common.err = nfs_ok;
1774         return 0;
1775 fail:
1776         cd->common.err = nfserr;
1777         return -EINVAL;
1778 }
1779
1780 static void
1781 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1782 {
1783         ENCODE_HEAD;
1784
1785         if (!nfserr) {
1786                 RESERVE_SPACE(8);
1787                 WRITE32(access->ac_supported);
1788                 WRITE32(access->ac_resp_access);
1789                 ADJUST_ARGS();
1790         }
1791 }
1792
1793 static void
1794 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1795 {
1796         ENCODE_SEQID_OP_HEAD;
1797
1798         if (!nfserr) {
1799                 RESERVE_SPACE(sizeof(stateid_t));
1800                 WRITE32(close->cl_stateid.si_generation);
1801                 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1802                 ADJUST_ARGS();
1803         }
1804         ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1805 }
1806
1807
1808 static void
1809 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1810 {
1811         ENCODE_HEAD;
1812
1813         if (!nfserr) {
1814                 RESERVE_SPACE(8);
1815                 WRITEMEM(commit->co_verf.data, 8);
1816                 ADJUST_ARGS();
1817         }
1818 }
1819
1820 static void
1821 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1822 {
1823         ENCODE_HEAD;
1824
1825         if (!nfserr) {
1826                 RESERVE_SPACE(32);
1827                 WRITECINFO(create->cr_cinfo);
1828                 WRITE32(2);
1829                 WRITE32(create->cr_bmval[0]);
1830                 WRITE32(create->cr_bmval[1]);
1831                 ADJUST_ARGS();
1832         }
1833 }
1834
1835 static int
1836 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1837 {
1838         struct svc_fh *fhp = getattr->ga_fhp;
1839         int buflen;
1840
1841         if (nfserr)
1842                 return nfserr;
1843
1844         buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1845         nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1846                                     resp->p, &buflen, getattr->ga_bmval,
1847                                     resp->rqstp);
1848
1849         if (!nfserr)
1850                 resp->p += buflen;
1851         return nfserr;
1852 }
1853
1854 static void
1855 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1856 {
1857         unsigned int len;
1858         ENCODE_HEAD;
1859
1860         if (!nfserr) {
1861                 len = fhp->fh_handle.fh_size;
1862                 RESERVE_SPACE(len + 4);
1863                 WRITE32(len);
1864                 WRITEMEM(&fhp->fh_handle.fh_base, len);
1865                 ADJUST_ARGS();
1866         }
1867 }
1868
1869 /*
1870 * Including all fields other than the name, a LOCK4denied structure requires
1871 *   8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1872 */
1873 static void
1874 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1875 {
1876         ENCODE_HEAD;
1877
1878         RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1879         WRITE64(ld->ld_start);
1880         WRITE64(ld->ld_length);
1881         WRITE32(ld->ld_type);
1882         if (ld->ld_sop) {
1883                 WRITEMEM(&ld->ld_clientid, 8);
1884                 WRITE32(ld->ld_sop->so_owner.len);
1885                 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1886                 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
1887         }  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
1888                 WRITE64((u64)0); /* clientid */
1889                 WRITE32(0); /* length of owner name */
1890         }
1891         ADJUST_ARGS();
1892 }
1893
1894 static void
1895 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1896 {
1897         ENCODE_SEQID_OP_HEAD;
1898
1899         if (!nfserr) {
1900                 RESERVE_SPACE(4 + sizeof(stateid_t));
1901                 WRITE32(lock->lk_resp_stateid.si_generation);
1902                 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1903                 ADJUST_ARGS();
1904         } else if (nfserr == nfserr_denied)
1905                 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1906
1907         ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1908 }
1909
1910 static void
1911 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1912 {
1913         if (nfserr == nfserr_denied)
1914                 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1915 }
1916
1917 static void
1918 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1919 {
1920         ENCODE_SEQID_OP_HEAD;
1921
1922         if (!nfserr) {
1923                 RESERVE_SPACE(sizeof(stateid_t));
1924                 WRITE32(locku->lu_stateid.si_generation);
1925                 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1926                 ADJUST_ARGS();
1927         }
1928                                         
1929         ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1930 }
1931
1932
1933 static void
1934 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1935 {
1936         ENCODE_HEAD;
1937
1938         if (!nfserr) {
1939                 RESERVE_SPACE(20);
1940                 WRITECINFO(link->li_cinfo);
1941                 ADJUST_ARGS();
1942         }
1943 }
1944
1945
1946 static void
1947 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1948 {
1949         ENCODE_SEQID_OP_HEAD;
1950
1951         if (nfserr)
1952                 goto out;
1953
1954         RESERVE_SPACE(36 + sizeof(stateid_t));
1955         WRITE32(open->op_stateid.si_generation);
1956         WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1957         WRITECINFO(open->op_cinfo);
1958         WRITE32(open->op_rflags);
1959         WRITE32(2);
1960         WRITE32(open->op_bmval[0]);
1961         WRITE32(open->op_bmval[1]);
1962         WRITE32(open->op_delegate_type);
1963         ADJUST_ARGS();
1964
1965         switch (open->op_delegate_type) {
1966         case NFS4_OPEN_DELEGATE_NONE:
1967                 break;
1968         case NFS4_OPEN_DELEGATE_READ:
1969                 RESERVE_SPACE(20 + sizeof(stateid_t));
1970                 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1971                 WRITE32(open->op_recall);
1972
1973                 /*
1974                  * TODO: ACE's in delegations
1975                  */
1976                 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1977                 WRITE32(0);
1978                 WRITE32(0);
1979                 WRITE32(0);   /* XXX: is NULL principal ok? */
1980                 ADJUST_ARGS();
1981                 break;
1982         case NFS4_OPEN_DELEGATE_WRITE:
1983                 RESERVE_SPACE(32 + sizeof(stateid_t));
1984                 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1985                 WRITE32(0);
1986
1987                 /*
1988                  * TODO: space_limit's in delegations
1989                  */
1990                 WRITE32(NFS4_LIMIT_SIZE);
1991                 WRITE32(~(u32)0);
1992                 WRITE32(~(u32)0);
1993
1994                 /*
1995                  * TODO: ACE's in delegations
1996                  */
1997                 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1998                 WRITE32(0);
1999                 WRITE32(0);
2000                 WRITE32(0);   /* XXX: is NULL principal ok? */
2001                 ADJUST_ARGS();
2002                 break;
2003         default:
2004                 BUG();
2005         }
2006         /* XXX save filehandle here */
2007 out:
2008         ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2009 }
2010
2011 static void
2012 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2013 {
2014         ENCODE_SEQID_OP_HEAD;
2015                                         
2016         if (!nfserr) {
2017                 RESERVE_SPACE(sizeof(stateid_t));
2018                 WRITE32(oc->oc_resp_stateid.si_generation);
2019                 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2020                 ADJUST_ARGS();
2021         }
2022
2023         ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2024 }
2025
2026 static void
2027 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2028 {
2029         ENCODE_SEQID_OP_HEAD;
2030                                         
2031         if (!nfserr) {
2032                 RESERVE_SPACE(sizeof(stateid_t));
2033                 WRITE32(od->od_stateid.si_generation);
2034                 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2035                 ADJUST_ARGS();
2036         }
2037
2038         ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2039 }
2040
2041 static int
2042 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr,
2043                   struct nfsd4_read *read)
2044 {
2045         u32 eof;
2046         int v, pn;
2047         unsigned long maxcount; 
2048         long len;
2049         ENCODE_HEAD;
2050
2051         if (nfserr)
2052                 return nfserr;
2053         if (resp->xbuf->page_len)
2054                 return nfserr_resource;
2055
2056         RESERVE_SPACE(8); /* eof flag and byte count */
2057
2058         maxcount = svc_max_payload(resp->rqstp);
2059         if (maxcount > read->rd_length)
2060                 maxcount = read->rd_length;
2061
2062         len = maxcount;
2063         v = 0;
2064         while (len > 0) {
2065                 pn = resp->rqstp->rq_resused++;
2066                 resp->rqstp->rq_vec[v].iov_base =
2067                         page_address(resp->rqstp->rq_respages[pn]);
2068                 resp->rqstp->rq_vec[v].iov_len =
2069                         len < PAGE_SIZE ? len : PAGE_SIZE;
2070                 v++;
2071                 len -= PAGE_SIZE;
2072         }
2073         read->rd_vlen = v;
2074
2075         nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2076                         read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2077                         &maxcount);
2078
2079         if (nfserr == nfserr_symlink)
2080                 nfserr = nfserr_inval;
2081         if (nfserr)
2082                 return nfserr;
2083         eof = (read->rd_offset + maxcount >=
2084                read->rd_fhp->fh_dentry->d_inode->i_size);
2085
2086         WRITE32(eof);
2087         WRITE32(maxcount);
2088         ADJUST_ARGS();
2089         resp->xbuf->head[0].iov_len = (char*)p
2090                                         - (char*)resp->xbuf->head[0].iov_base;
2091         resp->xbuf->page_len = maxcount;
2092
2093         /* Use rest of head for padding and remaining ops: */
2094         resp->xbuf->tail[0].iov_base = p;
2095         resp->xbuf->tail[0].iov_len = 0;
2096         if (maxcount&3) {
2097                 RESERVE_SPACE(4);
2098                 WRITE32(0);
2099                 resp->xbuf->tail[0].iov_base += maxcount&3;
2100                 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2101                 ADJUST_ARGS();
2102         }
2103         return 0;
2104 }
2105
2106 static int
2107 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2108 {
2109         int maxcount;
2110         char *page;
2111         ENCODE_HEAD;
2112
2113         if (nfserr)
2114                 return nfserr;
2115         if (resp->xbuf->page_len)
2116                 return nfserr_resource;
2117
2118         page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2119
2120         maxcount = PAGE_SIZE;
2121         RESERVE_SPACE(4);
2122
2123         /*
2124          * XXX: By default, the ->readlink() VFS op will truncate symlinks
2125          * if they would overflow the buffer.  Is this kosher in NFSv4?  If
2126          * not, one easy fix is: if ->readlink() precisely fills the buffer,
2127          * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2128          */
2129         nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2130         if (nfserr == nfserr_isdir)
2131                 return nfserr_inval;
2132         if (nfserr)
2133                 return nfserr;
2134
2135         WRITE32(maxcount);
2136         ADJUST_ARGS();
2137         resp->xbuf->head[0].iov_len = (char*)p
2138                                 - (char*)resp->xbuf->head[0].iov_base;
2139         resp->xbuf->page_len = maxcount;
2140
2141         /* Use rest of head for padding and remaining ops: */
2142         resp->xbuf->tail[0].iov_base = p;
2143         resp->xbuf->tail[0].iov_len = 0;
2144         if (maxcount&3) {
2145                 RESERVE_SPACE(4);
2146                 WRITE32(0);
2147                 resp->xbuf->tail[0].iov_base += maxcount&3;
2148                 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2149                 ADJUST_ARGS();
2150         }
2151         return 0;
2152 }
2153
2154 static int
2155 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2156 {
2157         int maxcount;
2158         loff_t offset;
2159         u32 *page, *savep, *tailbase;
2160         ENCODE_HEAD;
2161
2162         if (nfserr)
2163                 return nfserr;
2164         if (resp->xbuf->page_len)
2165                 return nfserr_resource;
2166
2167         RESERVE_SPACE(8);  /* verifier */
2168         savep = p;
2169
2170         /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2171         WRITE32(0);
2172         WRITE32(0);
2173         ADJUST_ARGS();
2174         resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2175         tailbase = p;
2176
2177         maxcount = PAGE_SIZE;
2178         if (maxcount > readdir->rd_maxcount)
2179                 maxcount = readdir->rd_maxcount;
2180
2181         /*
2182          * Convert from bytes to words, account for the two words already
2183          * written, make sure to leave two words at the end for the next
2184          * pointer and eof field.
2185          */
2186         maxcount = (maxcount >> 2) - 4;
2187         if (maxcount < 0) {
2188                 nfserr =  nfserr_toosmall;
2189                 goto err_no_verf;
2190         }
2191
2192         page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2193         readdir->common.err = 0;
2194         readdir->buflen = maxcount;
2195         readdir->buffer = page;
2196         readdir->offset = NULL;
2197
2198         offset = readdir->rd_cookie;
2199         nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2200                               &offset,
2201                               &readdir->common, nfsd4_encode_dirent);
2202         if (nfserr == nfs_ok &&
2203             readdir->common.err == nfserr_toosmall &&
2204             readdir->buffer == page) 
2205                 nfserr = nfserr_toosmall;
2206         if (nfserr == nfserr_symlink)
2207                 nfserr = nfserr_notdir;
2208         if (nfserr)
2209                 goto err_no_verf;
2210
2211         if (readdir->offset)
2212                 xdr_encode_hyper(readdir->offset, offset);
2213
2214         p = readdir->buffer;
2215         *p++ = 0;       /* no more entries */
2216         *p++ = htonl(readdir->common.err == nfserr_eof);
2217         resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2218                 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2219
2220         /* Use rest of head for padding and remaining ops: */
2221         resp->xbuf->tail[0].iov_base = tailbase;
2222         resp->xbuf->tail[0].iov_len = 0;
2223         resp->p = resp->xbuf->tail[0].iov_base;
2224         resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2225
2226         return 0;
2227 err_no_verf:
2228         p = savep;
2229         ADJUST_ARGS();
2230         return nfserr;
2231 }
2232
2233 static void
2234 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2235 {
2236         ENCODE_HEAD;
2237
2238         if (!nfserr) {
2239                 RESERVE_SPACE(20);
2240                 WRITECINFO(remove->rm_cinfo);
2241                 ADJUST_ARGS();
2242         }
2243 }
2244
2245 static void
2246 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2247 {
2248         ENCODE_HEAD;
2249
2250         if (!nfserr) {
2251                 RESERVE_SPACE(40);
2252                 WRITECINFO(rename->rn_sinfo);
2253                 WRITECINFO(rename->rn_tinfo);
2254                 ADJUST_ARGS();
2255         }
2256 }
2257
2258 /*
2259  * The SETATTR encode routine is special -- it always encodes a bitmap,
2260  * regardless of the error status.
2261  */
2262 static void
2263 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2264 {
2265         ENCODE_HEAD;
2266
2267         RESERVE_SPACE(12);
2268         if (nfserr) {
2269                 WRITE32(2);
2270                 WRITE32(0);
2271                 WRITE32(0);
2272         }
2273         else {
2274                 WRITE32(2);
2275                 WRITE32(setattr->sa_bmval[0]);
2276                 WRITE32(setattr->sa_bmval[1]);
2277         }
2278         ADJUST_ARGS();
2279 }
2280
2281 static void
2282 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2283 {
2284         ENCODE_HEAD;
2285
2286         if (!nfserr) {
2287                 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2288                 WRITEMEM(&scd->se_clientid, 8);
2289                 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2290                 ADJUST_ARGS();
2291         }
2292         else if (nfserr == nfserr_clid_inuse) {
2293                 RESERVE_SPACE(8);
2294                 WRITE32(0);
2295                 WRITE32(0);
2296                 ADJUST_ARGS();
2297         }
2298 }
2299
2300 static void
2301 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2302 {
2303         ENCODE_HEAD;
2304
2305         if (!nfserr) {
2306                 RESERVE_SPACE(16);
2307                 WRITE32(write->wr_bytes_written);
2308                 WRITE32(write->wr_how_written);
2309                 WRITEMEM(write->wr_verifier.data, 8);
2310                 ADJUST_ARGS();
2311         }
2312 }
2313
2314 void
2315 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2316 {
2317         u32 *statp;
2318         ENCODE_HEAD;
2319
2320         RESERVE_SPACE(8);
2321         WRITE32(op->opnum);
2322         statp = p++;    /* to be backfilled at the end */
2323         ADJUST_ARGS();
2324
2325         switch (op->opnum) {
2326         case OP_ACCESS:
2327                 nfsd4_encode_access(resp, op->status, &op->u.access);
2328                 break;
2329         case OP_CLOSE:
2330                 nfsd4_encode_close(resp, op->status, &op->u.close);
2331                 break;
2332         case OP_COMMIT:
2333                 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2334                 break;
2335         case OP_CREATE:
2336                 nfsd4_encode_create(resp, op->status, &op->u.create);
2337                 break;
2338         case OP_DELEGRETURN:
2339                 break;
2340         case OP_GETATTR:
2341                 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2342                 break;
2343         case OP_GETFH:
2344                 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2345                 break;
2346         case OP_LINK:
2347                 nfsd4_encode_link(resp, op->status, &op->u.link);
2348                 break;
2349         case OP_LOCK:
2350                 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2351                 break;
2352         case OP_LOCKT:
2353                 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2354                 break;
2355         case OP_LOCKU:
2356                 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2357                 break;
2358         case OP_LOOKUP:
2359                 break;
2360         case OP_LOOKUPP:
2361                 break;
2362         case OP_NVERIFY:
2363                 break;
2364         case OP_OPEN:
2365                 nfsd4_encode_open(resp, op->status, &op->u.open);
2366                 break;
2367         case OP_OPEN_CONFIRM:
2368                 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2369                 break;
2370         case OP_OPEN_DOWNGRADE:
2371                 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2372                 break;
2373         case OP_PUTFH:
2374                 break;
2375         case OP_PUTROOTFH:
2376                 break;
2377         case OP_READ:
2378                 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2379                 break;
2380         case OP_READDIR:
2381                 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2382                 break;
2383         case OP_READLINK:
2384                 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2385                 break;
2386         case OP_REMOVE:
2387                 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2388                 break;
2389         case OP_RENAME:
2390                 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2391                 break;
2392         case OP_RENEW:
2393                 break;
2394         case OP_RESTOREFH:
2395                 break;
2396         case OP_SAVEFH:
2397                 break;
2398         case OP_SETATTR:
2399                 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2400                 break;
2401         case OP_SETCLIENTID:
2402                 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2403                 break;
2404         case OP_SETCLIENTID_CONFIRM:
2405                 break;
2406         case OP_VERIFY:
2407                 break;
2408         case OP_WRITE:
2409                 nfsd4_encode_write(resp, op->status, &op->u.write);
2410                 break;
2411         case OP_RELEASE_LOCKOWNER:
2412                 break;
2413         default:
2414                 break;
2415         }
2416
2417         /*
2418          * Note: We write the status directly, instead of using WRITE32(),
2419          * since it is already in network byte order.
2420          */
2421         *statp = op->status;
2422 }
2423
2424 /* 
2425  * Encode the reply stored in the stateowner reply cache 
2426  * 
2427  * XDR note: do not encode rp->rp_buflen: the buffer contains the
2428  * previously sent already encoded operation.
2429  *
2430  * called with nfs4_lock_state() held
2431  */
2432 void
2433 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2434 {
2435         ENCODE_HEAD;
2436         struct nfs4_replay *rp = op->replay;
2437
2438         BUG_ON(!rp);
2439
2440         RESERVE_SPACE(8);
2441         WRITE32(op->opnum);
2442         *p++ = rp->rp_status;  /* already xdr'ed */
2443         ADJUST_ARGS();
2444
2445         RESERVE_SPACE(rp->rp_buflen);
2446         WRITEMEM(rp->rp_buf, rp->rp_buflen);
2447         ADJUST_ARGS();
2448 }
2449
2450 /*
2451  * END OF "GENERIC" ENCODE ROUTINES.
2452  */
2453
2454 int
2455 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2456 {
2457         return xdr_ressize_check(rqstp, p);
2458 }
2459
2460 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2461 {
2462         if (args->ops != args->iops) {
2463                 kfree(args->ops);
2464                 args->ops = args->iops;
2465         }
2466         kfree(args->tmpp);
2467         args->tmpp = NULL;
2468         while (args->to_free) {
2469                 struct tmpbuf *tb = args->to_free;
2470                 args->to_free = tb->next;
2471                 tb->release(tb->buf);
2472                 kfree(tb);
2473         }
2474 }
2475
2476 int
2477 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2478 {
2479         int status;
2480
2481         args->p = p;
2482         args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2483         args->pagelist = rqstp->rq_arg.pages;
2484         args->pagelen = rqstp->rq_arg.page_len;
2485         args->tmpp = NULL;
2486         args->to_free = NULL;
2487         args->ops = args->iops;
2488         args->rqstp = rqstp;
2489
2490         status = nfsd4_decode_compound(args);
2491         if (status) {
2492                 nfsd4_release_compoundargs(args);
2493         }
2494         return !status;
2495 }
2496
2497 int
2498 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2499 {
2500         /*
2501          * All that remains is to write the tag and operation count...
2502          */
2503         struct kvec *iov;
2504         p = resp->tagp;
2505         *p++ = htonl(resp->taglen);
2506         memcpy(p, resp->tag, resp->taglen);
2507         p += XDR_QUADLEN(resp->taglen);
2508         *p++ = htonl(resp->opcnt);
2509
2510         if (rqstp->rq_res.page_len) 
2511                 iov = &rqstp->rq_res.tail[0];
2512         else
2513                 iov = &rqstp->rq_res.head[0];
2514         iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2515         BUG_ON(iov->iov_len > PAGE_SIZE);
2516         return 1;
2517 }
2518
2519 /*
2520  * Local variables:
2521  *  c-basic-offset: 8
2522  * End:
2523  */