e86406eff0ebf460091ded1bab39ad138cd4a478
[sfrench/cifs-2.6.git] / fs / nfs / nfs4xdr.c
1 /*
2  *  fs/nfs/nfs4xdr.c
3  *
4  *  Client-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
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/slab.h>
42 #include <linux/utsname.h>
43 #include <linux/errno.h>
44 #include <linux/string.h>
45 #include <linux/in.h>
46 #include <linux/pagemap.h>
47 #include <linux/proc_fs.h>
48 #include <linux/kdev_t.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55
56 #define NFSDBG_FACILITY         NFSDBG_XDR
57
58 /* Mapping from NFS error code to "errno" error code. */
59 #define errno_NFSERR_IO         EIO
60
61 static int nfs_stat_to_errno(int);
62
63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64 #ifdef DEBUG
65 #define NFS4_MAXTAGLEN          20
66 #else
67 #define NFS4_MAXTAGLEN          0
68 #endif
69
70 /* lock,open owner id: 
71  * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
72  */
73 #define owner_id_maxsz          (1 + 1)
74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
76 #define op_encode_hdr_maxsz     (1)
77 #define op_decode_hdr_maxsz     (2)
78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
79                                 (NFS4_FHSIZE >> 2))
80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
85                                 ((3+NFS4_FHSIZE) >> 2))
86 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + 3)
87 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
88 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
89 #define nfs4_fattr_bitmap_maxsz (36 + 2 * nfs4_name_maxsz)
90 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + 3 + \
91                                 nfs4_fattr_bitmap_maxsz)
92 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
93 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
94 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
95 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
96 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
97 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
98 #define encode_setclientid_maxsz \
99                                 (op_encode_hdr_maxsz + \
100                                 4 /*server->ip_addr*/ + \
101                                 1 /*Netid*/ + \
102                                 6 /*uaddr*/ + \
103                                 6 + (NFS4_VERIFIER_SIZE >> 2))
104 #define decode_setclientid_maxsz \
105                                 (op_decode_hdr_maxsz + \
106                                 2 + \
107                                 1024) /* large value for CLID_INUSE */
108 #define encode_setclientid_confirm_maxsz \
109                                 (op_encode_hdr_maxsz + \
110                                 3 + (NFS4_VERIFIER_SIZE >> 2))
111 #define decode_setclientid_confirm_maxsz \
112                                 (op_decode_hdr_maxsz)
113 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
114                                 1 + ((3 + NFS4_FHSIZE) >> 2))
115 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
116                                 nfs4_name_maxsz)
117 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
118                                 2 * nfs4_name_maxsz)
119 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
120 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
121                                 nfs4_name_maxsz)
122 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
123 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
124                                 1 + nfs4_name_maxsz + \
125                                 nfs4_path_maxsz + \
126                                 nfs4_fattr_bitmap_maxsz)
127 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
128 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
129                                 2 + nfs4_name_maxsz + \
130                                 nfs4_fattr_bitmap_maxsz)
131 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
132 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
133 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
134 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
135 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
136 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
137                                 encode_putfh_maxsz + \
138                                 op_encode_hdr_maxsz + 7)
139 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
140                                 decode_putfh_maxsz + \
141                                 op_decode_hdr_maxsz + 2)
142 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
143                                 encode_putfh_maxsz + \
144                                 op_encode_hdr_maxsz)
145 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
146                                 decode_putfh_maxsz + \
147                                 op_decode_hdr_maxsz)
148 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
149                                 encode_putfh_maxsz + \
150                                 op_encode_hdr_maxsz + 9)
151 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
152                                 decode_putfh_maxsz + \
153                                 op_decode_hdr_maxsz + 2)
154 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
155                                 encode_putfh_maxsz + \
156                                 op_encode_hdr_maxsz + 8)
157 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
158                                 decode_putfh_maxsz + \
159                                 op_decode_hdr_maxsz + 4)
160 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
161                                 encode_putfh_maxsz + \
162                                 op_encode_hdr_maxsz + 3)
163 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
164                                 decode_putfh_maxsz + \
165                                 op_decode_hdr_maxsz + 2)
166 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
167                                 encode_putfh_maxsz + \
168                                 op_encode_hdr_maxsz + \
169                                 13 + 3 + 2 + 64 + \
170                                 encode_getattr_maxsz + \
171                                 encode_getfh_maxsz)
172 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
173                                 decode_putfh_maxsz + \
174                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
175                                 decode_getattr_maxsz + \
176                                 decode_getfh_maxsz)
177 #define NFS4_enc_open_confirm_sz      \
178                                 (compound_encode_hdr_maxsz + \
179                                 encode_putfh_maxsz + \
180                                 op_encode_hdr_maxsz + 5)
181 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
182                                         decode_putfh_maxsz + \
183                                         op_decode_hdr_maxsz + 4)
184 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
185                                         encode_putfh_maxsz + \
186                                         op_encode_hdr_maxsz + \
187                                         11)
188 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
189                                         decode_putfh_maxsz + \
190                                         op_decode_hdr_maxsz + \
191                                         4 + 5 + 2 + 3)
192 #define NFS4_enc_open_downgrade_sz \
193                                 (compound_encode_hdr_maxsz + \
194                                 encode_putfh_maxsz + \
195                                 op_encode_hdr_maxsz + 7)
196 #define NFS4_dec_open_downgrade_sz \
197                                 (compound_decode_hdr_maxsz + \
198                                 decode_putfh_maxsz + \
199                                 op_decode_hdr_maxsz + 4)
200 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
201                                 encode_putfh_maxsz + \
202                                 op_encode_hdr_maxsz + 5)
203 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
204                                 decode_putfh_maxsz + \
205                                 op_decode_hdr_maxsz + 4)
206 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
207                                 encode_putfh_maxsz + \
208                                 op_encode_hdr_maxsz + 4 + \
209                                 nfs4_fattr_bitmap_maxsz + \
210                                 encode_getattr_maxsz)
211 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
212                                 decode_putfh_maxsz + \
213                                 op_decode_hdr_maxsz + 3)
214 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
215                                 encode_putfh_maxsz + \
216                                 encode_fsinfo_maxsz)
217 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
218                                 decode_putfh_maxsz + \
219                                 decode_fsinfo_maxsz)
220 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
221                                 encode_renew_maxsz)
222 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
223                                 decode_renew_maxsz)
224 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
225                                 encode_setclientid_maxsz)
226 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
227                                 decode_setclientid_maxsz)
228 #define NFS4_enc_setclientid_confirm_sz \
229                                 (compound_encode_hdr_maxsz + \
230                                 encode_setclientid_confirm_maxsz + \
231                                 encode_putrootfh_maxsz + \
232                                 encode_fsinfo_maxsz)
233 #define NFS4_dec_setclientid_confirm_sz \
234                                 (compound_decode_hdr_maxsz + \
235                                 decode_setclientid_confirm_maxsz + \
236                                 decode_putrootfh_maxsz + \
237                                 decode_fsinfo_maxsz)
238 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
239                                 encode_putfh_maxsz + \
240                                 encode_getattr_maxsz + \
241                                 op_encode_hdr_maxsz + \
242                                 1 + 1 + 2 + 2 + \
243                                 1 + 4 + 1 + 2 + \
244                                 owner_id_maxsz)
245 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
246                                 decode_putfh_maxsz + \
247                                 decode_getattr_maxsz + \
248                                 op_decode_hdr_maxsz + \
249                                 2 + 2 + 1 + 2 + \
250                                 owner_id_maxsz)
251 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
252                                 encode_putfh_maxsz + \
253                                 encode_getattr_maxsz + \
254                                 op_encode_hdr_maxsz + \
255                                 1 + 2 + 2 + 2 + \
256                                 owner_id_maxsz)
257 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
258 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
259                                 encode_putfh_maxsz + \
260                                 encode_getattr_maxsz + \
261                                 op_encode_hdr_maxsz + \
262                                 1 + 1 + 4 + 2 + 2)
263 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
264                                 decode_putfh_maxsz + \
265                                 decode_getattr_maxsz + \
266                                 op_decode_hdr_maxsz + 4)
267 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
268                                 encode_putfh_maxsz + \
269                                 op_encode_hdr_maxsz + 1)
270 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
271                                 decode_putfh_maxsz + \
272                                 op_decode_hdr_maxsz + 2)
273 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
274                                 encode_putfh_maxsz + \
275                                 encode_getattr_maxsz)
276 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
277                                 decode_putfh_maxsz + \
278                                 decode_getattr_maxsz)
279 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
280                                 encode_putfh_maxsz + \
281                                 encode_lookup_maxsz + \
282                                 encode_getattr_maxsz + \
283                                 encode_getfh_maxsz)
284 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
285                                 decode_putfh_maxsz + \
286                                 op_decode_hdr_maxsz + \
287                                 decode_getattr_maxsz + \
288                                 decode_getfh_maxsz)
289 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
290                                 encode_putrootfh_maxsz + \
291                                 encode_getattr_maxsz + \
292                                 encode_getfh_maxsz)
293 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
294                                 decode_putrootfh_maxsz + \
295                                 decode_getattr_maxsz + \
296                                 decode_getfh_maxsz)
297 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
298                                 encode_putfh_maxsz + \
299                                 encode_remove_maxsz)
300 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
301                                 decode_putfh_maxsz + \
302                                 op_decode_hdr_maxsz + 5)
303 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
304                                 encode_putfh_maxsz + \
305                                 encode_savefh_maxsz + \
306                                 encode_putfh_maxsz + \
307                                 encode_rename_maxsz)
308 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
309                                 decode_putfh_maxsz + \
310                                 decode_savefh_maxsz + \
311                                 decode_putfh_maxsz + \
312                                 decode_rename_maxsz)
313 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
314                                 encode_putfh_maxsz + \
315                                 encode_savefh_maxsz + \
316                                 encode_putfh_maxsz + \
317                                 encode_link_maxsz)
318 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
319                                 decode_putfh_maxsz + \
320                                 decode_savefh_maxsz + \
321                                 decode_putfh_maxsz + \
322                                 decode_link_maxsz)
323 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
324                                 encode_putfh_maxsz + \
325                                 encode_symlink_maxsz + \
326                                 encode_getattr_maxsz + \
327                                 encode_getfh_maxsz)
328 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
329                                 decode_putfh_maxsz + \
330                                 decode_symlink_maxsz + \
331                                 decode_getattr_maxsz + \
332                                 decode_getfh_maxsz)
333 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
334                                 encode_putfh_maxsz + \
335                                 encode_create_maxsz + \
336                                 encode_getattr_maxsz + \
337                                 encode_getfh_maxsz)
338 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
339                                 decode_putfh_maxsz + \
340                                 decode_create_maxsz + \
341                                 decode_getattr_maxsz + \
342                                 decode_getfh_maxsz)
343 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
344                                 encode_putfh_maxsz + \
345                                 encode_getattr_maxsz)
346 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
347                                 decode_putfh_maxsz + \
348                                 decode_getattr_maxsz)
349 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
350                                 encode_putfh_maxsz + \
351                                 encode_getattr_maxsz)
352 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
353                                 decode_putfh_maxsz + \
354                                 op_decode_hdr_maxsz + 12)
355 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
356                                 encode_getattr_maxsz)
357 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
358                                 decode_getattr_maxsz)
359 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
360                                 encode_putfh_maxsz + \
361                                 encode_delegreturn_maxsz)
362 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
363                                 decode_delegreturn_maxsz)
364
365 static struct {
366         unsigned int    mode;
367         unsigned int    nfs2type;
368 } nfs_type2fmt[] = {
369         { 0,            NFNON        },
370         { S_IFREG,      NFREG        },
371         { S_IFDIR,      NFDIR        },
372         { S_IFBLK,      NFBLK        },
373         { S_IFCHR,      NFCHR        },
374         { S_IFLNK,      NFLNK        },
375         { S_IFSOCK,     NFSOCK       },
376         { S_IFIFO,      NFFIFO       },
377         { 0,            NFNON        },
378         { 0,            NFNON        },
379 };
380
381 struct compound_hdr {
382         int32_t         status;
383         uint32_t        nops;
384         uint32_t        taglen;
385         char *          tag;
386 };
387
388 /*
389  * START OF "GENERIC" ENCODE ROUTINES.
390  *   These may look a little ugly since they are imported from a "generic"
391  * set of XDR encode/decode routines which are intended to be shared by
392  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
393  *
394  * If the pain of reading these is too great, it should be a straightforward
395  * task to translate them into Linux-specific versions which are more
396  * consistent with the style used in NFSv2/v3...
397  */
398 #define WRITE32(n)               *p++ = htonl(n)
399 #define WRITE64(n)               do {                           \
400         *p++ = htonl((uint32_t)((n) >> 32));                            \
401         *p++ = htonl((uint32_t)(n));                                    \
402 } while (0)
403 #define WRITEMEM(ptr,nbytes)     do {                           \
404         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
405 } while (0)
406
407 #define RESERVE_SPACE(nbytes)   do {                            \
408         p = xdr_reserve_space(xdr, nbytes);                     \
409         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
410         BUG_ON(!p);                                             \
411 } while (0)
412
413 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
414 {
415         uint32_t *p;
416
417         p = xdr_reserve_space(xdr, 4 + len);
418         BUG_ON(p == NULL);
419         xdr_encode_opaque(p, str, len);
420 }
421
422 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
423 {
424         uint32_t *p;
425
426         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
427         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
428         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
429         WRITE32(hdr->taglen);
430         WRITEMEM(hdr->tag, hdr->taglen);
431         WRITE32(NFS4_MINOR_VERSION);
432         WRITE32(hdr->nops);
433         return 0;
434 }
435
436 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
437 {
438         uint32_t *p;
439
440         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
441         BUG_ON(p == NULL);
442         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
443 }
444
445 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
446 {
447         char owner_name[IDMAP_NAMESZ];
448         char owner_group[IDMAP_NAMESZ];
449         int owner_namelen = 0;
450         int owner_grouplen = 0;
451         uint32_t *p;
452         uint32_t *q;
453         int len;
454         uint32_t bmval0 = 0;
455         uint32_t bmval1 = 0;
456         int status;
457
458         /*
459          * We reserve enough space to write the entire attribute buffer at once.
460          * In the worst-case, this would be
461          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
462          *          = 36 bytes, plus any contribution from variable-length fields
463          *            such as owner/group/acl's.
464          */
465         len = 16;
466
467         /* Sigh */
468         if (iap->ia_valid & ATTR_SIZE)
469                 len += 8;
470         if (iap->ia_valid & ATTR_MODE)
471                 len += 4;
472         if (iap->ia_valid & ATTR_UID) {
473                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
474                 if (owner_namelen < 0) {
475                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
476                                iap->ia_uid);
477                         /* XXX */
478                         strcpy(owner_name, "nobody");
479                         owner_namelen = sizeof("nobody") - 1;
480                         /* goto out; */
481                 }
482                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
483         }
484         if (iap->ia_valid & ATTR_GID) {
485                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
486                 if (owner_grouplen < 0) {
487                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
488                                iap->ia_gid);
489                         strcpy(owner_group, "nobody");
490                         owner_grouplen = sizeof("nobody") - 1;
491                         /* goto out; */
492                 }
493                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
494         }
495         if (iap->ia_valid & ATTR_ATIME_SET)
496                 len += 16;
497         else if (iap->ia_valid & ATTR_ATIME)
498                 len += 4;
499         if (iap->ia_valid & ATTR_MTIME_SET)
500                 len += 16;
501         else if (iap->ia_valid & ATTR_MTIME)
502                 len += 4;
503         RESERVE_SPACE(len);
504
505         /*
506          * We write the bitmap length now, but leave the bitmap and the attribute
507          * buffer length to be backfilled at the end of this routine.
508          */
509         WRITE32(2);
510         q = p;
511         p += 3;
512
513         if (iap->ia_valid & ATTR_SIZE) {
514                 bmval0 |= FATTR4_WORD0_SIZE;
515                 WRITE64(iap->ia_size);
516         }
517         if (iap->ia_valid & ATTR_MODE) {
518                 bmval1 |= FATTR4_WORD1_MODE;
519                 WRITE32(iap->ia_mode);
520         }
521         if (iap->ia_valid & ATTR_UID) {
522                 bmval1 |= FATTR4_WORD1_OWNER;
523                 WRITE32(owner_namelen);
524                 WRITEMEM(owner_name, owner_namelen);
525         }
526         if (iap->ia_valid & ATTR_GID) {
527                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
528                 WRITE32(owner_grouplen);
529                 WRITEMEM(owner_group, owner_grouplen);
530         }
531         if (iap->ia_valid & ATTR_ATIME_SET) {
532                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
533                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
534                 WRITE32(0);
535                 WRITE32(iap->ia_mtime.tv_sec);
536                 WRITE32(iap->ia_mtime.tv_nsec);
537         }
538         else if (iap->ia_valid & ATTR_ATIME) {
539                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
540                 WRITE32(NFS4_SET_TO_SERVER_TIME);
541         }
542         if (iap->ia_valid & ATTR_MTIME_SET) {
543                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
544                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
545                 WRITE32(0);
546                 WRITE32(iap->ia_mtime.tv_sec);
547                 WRITE32(iap->ia_mtime.tv_nsec);
548         }
549         else if (iap->ia_valid & ATTR_MTIME) {
550                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
551                 WRITE32(NFS4_SET_TO_SERVER_TIME);
552         }
553         
554         /*
555          * Now we backfill the bitmap and the attribute buffer length.
556          */
557         if (len != ((char *)p - (char *)q) + 4) {
558                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
559                                 len, ((char *)p - (char *)q) + 4);
560                 BUG();
561         }
562         len = (char *)p - (char *)q - 12;
563         *q++ = htonl(bmval0);
564         *q++ = htonl(bmval1);
565         *q++ = htonl(len);
566
567         status = 0;
568 /* out: */
569         return status;
570 }
571
572 static int encode_access(struct xdr_stream *xdr, u32 access)
573 {
574         uint32_t *p;
575
576         RESERVE_SPACE(8);
577         WRITE32(OP_ACCESS);
578         WRITE32(access);
579         
580         return 0;
581 }
582
583 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
584 {
585         uint32_t *p;
586
587         RESERVE_SPACE(8+sizeof(arg->stateid.data));
588         WRITE32(OP_CLOSE);
589         WRITE32(arg->seqid);
590         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
591         
592         return 0;
593 }
594
595 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
596 {
597         uint32_t *p;
598         
599         RESERVE_SPACE(16);
600         WRITE32(OP_COMMIT);
601         WRITE64(args->offset);
602         WRITE32(args->count);
603
604         return 0;
605 }
606
607 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
608 {
609         uint32_t *p;
610         
611         RESERVE_SPACE(8);
612         WRITE32(OP_CREATE);
613         WRITE32(create->ftype);
614
615         switch (create->ftype) {
616         case NF4LNK:
617                 RESERVE_SPACE(4 + create->u.symlink->len);
618                 WRITE32(create->u.symlink->len);
619                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
620                 break;
621
622         case NF4BLK: case NF4CHR:
623                 RESERVE_SPACE(8);
624                 WRITE32(create->u.device.specdata1);
625                 WRITE32(create->u.device.specdata2);
626                 break;
627
628         default:
629                 break;
630         }
631
632         RESERVE_SPACE(4 + create->name->len);
633         WRITE32(create->name->len);
634         WRITEMEM(create->name->name, create->name->len);
635
636         return encode_attrs(xdr, create->attrs, create->server);
637 }
638
639 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
640 {
641         uint32_t *p;
642
643         RESERVE_SPACE(12);
644         WRITE32(OP_GETATTR);
645         WRITE32(1);
646         WRITE32(bitmap);
647         return 0;
648 }
649
650 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
651 {
652         uint32_t *p;
653
654         RESERVE_SPACE(16);
655         WRITE32(OP_GETATTR);
656         WRITE32(2);
657         WRITE32(bm0);
658         WRITE32(bm1);
659         return 0;
660 }
661
662 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
663 {
664         return encode_getattr_two(xdr,
665                         bitmask[0] & nfs4_fattr_bitmap[0],
666                         bitmask[1] & nfs4_fattr_bitmap[1]);
667 }
668
669 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
670 {
671         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
672                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
673 }
674
675 static int encode_getfh(struct xdr_stream *xdr)
676 {
677         uint32_t *p;
678
679         RESERVE_SPACE(4);
680         WRITE32(OP_GETFH);
681
682         return 0;
683 }
684
685 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
686 {
687         uint32_t *p;
688
689         RESERVE_SPACE(8 + name->len);
690         WRITE32(OP_LINK);
691         WRITE32(name->len);
692         WRITEMEM(name->name, name->len);
693         
694         return 0;
695 }
696
697 /*
698  * opcode,type,reclaim,offset,length,new_lock_owner = 32
699  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
700  */
701 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
702 {
703         uint32_t *p;
704         struct nfs_lock_opargs *opargs = arg->u.lock;
705
706         RESERVE_SPACE(32);
707         WRITE32(OP_LOCK);
708         WRITE32(arg->type); 
709         WRITE32(opargs->reclaim);
710         WRITE64(arg->offset);
711         WRITE64(arg->length);
712         WRITE32(opargs->new_lock_owner);
713         if (opargs->new_lock_owner){
714                 struct nfs_open_to_lock *ol = opargs->u.open_lock;
715
716                 RESERVE_SPACE(40);
717                 WRITE32(ol->open_seqid);
718                 WRITEMEM(&ol->open_stateid, sizeof(ol->open_stateid));
719                 WRITE32(ol->lock_seqid);
720                 WRITE64(ol->lock_owner.clientid);
721                 WRITE32(4);
722                 WRITE32(ol->lock_owner.id);
723         }
724         else {
725                 struct nfs_exist_lock *el = opargs->u.exist_lock;
726
727                 RESERVE_SPACE(20);
728                 WRITEMEM(&el->stateid, sizeof(el->stateid));
729                 WRITE32(el->seqid);
730         }
731
732         return 0;
733 }
734
735 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
736 {
737         uint32_t *p;
738         struct nfs_lowner *opargs = arg->u.lockt;
739
740         RESERVE_SPACE(40);
741         WRITE32(OP_LOCKT);
742         WRITE32(arg->type);
743         WRITE64(arg->offset);
744         WRITE64(arg->length);
745         WRITE64(opargs->clientid);
746         WRITE32(4);
747         WRITE32(opargs->id);
748
749         return 0;
750 }
751
752 static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
753 {
754         uint32_t *p;
755         struct nfs_locku_opargs *opargs = arg->u.locku;
756
757         RESERVE_SPACE(44);
758         WRITE32(OP_LOCKU);
759         WRITE32(arg->type);
760         WRITE32(opargs->seqid);
761         WRITEMEM(&opargs->stateid, sizeof(opargs->stateid));
762         WRITE64(arg->offset);
763         WRITE64(arg->length);
764
765         return 0;
766 }
767
768 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
769 {
770         int len = name->len;
771         uint32_t *p;
772
773         RESERVE_SPACE(8 + len);
774         WRITE32(OP_LOOKUP);
775         WRITE32(len);
776         WRITEMEM(name->name, len);
777
778         return 0;
779 }
780
781 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
782 {
783         uint32_t *p;
784
785         RESERVE_SPACE(8);
786         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
787                 case FMODE_READ:
788                         WRITE32(NFS4_SHARE_ACCESS_READ);
789                         break;
790                 case FMODE_WRITE:
791                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
792                         break;
793                 case FMODE_READ|FMODE_WRITE:
794                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
795                         break;
796                 default:
797                         BUG();
798         }
799         WRITE32(0);             /* for linux, share_deny = 0 always */
800 }
801
802 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
803 {
804         uint32_t *p;
805  /*
806  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
807  * owner 4 = 32
808  */
809         RESERVE_SPACE(8);
810         WRITE32(OP_OPEN);
811         WRITE32(arg->seqid);
812         encode_share_access(xdr, arg->open_flags);
813         RESERVE_SPACE(16);
814         WRITE64(arg->clientid);
815         WRITE32(4);
816         WRITE32(arg->id);
817 }
818
819 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
820 {
821         uint32_t *p;
822
823         RESERVE_SPACE(4);
824         switch(arg->open_flags & O_EXCL) {
825                 case 0:
826                         WRITE32(NFS4_CREATE_UNCHECKED);
827                         encode_attrs(xdr, arg->u.attrs, arg->server);
828                         break;
829                 default:
830                         WRITE32(NFS4_CREATE_EXCLUSIVE);
831                         encode_nfs4_verifier(xdr, &arg->u.verifier);
832         }
833 }
834
835 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
836 {
837         uint32_t *p;
838
839         RESERVE_SPACE(4);
840         switch (arg->open_flags & O_CREAT) {
841                 case 0:
842                         WRITE32(NFS4_OPEN_NOCREATE);
843                         break;
844                 default:
845                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
846                         WRITE32(NFS4_OPEN_CREATE);
847                         encode_createmode(xdr, arg);
848         }
849 }
850
851 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
852 {
853         uint32_t *p;
854
855         RESERVE_SPACE(4);
856         switch (delegation_type) {
857                 case 0:
858                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
859                         break;
860                 case FMODE_READ:
861                         WRITE32(NFS4_OPEN_DELEGATE_READ);
862                         break;
863                 case FMODE_WRITE|FMODE_READ:
864                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
865                         break;
866                 default:
867                         BUG();
868         }
869 }
870
871 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
872 {
873         uint32_t *p;
874
875         RESERVE_SPACE(4);
876         WRITE32(NFS4_OPEN_CLAIM_NULL);
877         encode_string(xdr, name->len, name->name);
878 }
879
880 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
881 {
882         uint32_t *p;
883
884         RESERVE_SPACE(4);
885         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
886         encode_delegation_type(xdr, type);
887 }
888
889 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
890 {
891         uint32_t *p;
892
893         RESERVE_SPACE(4+sizeof(stateid->data));
894         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
895         WRITEMEM(stateid->data, sizeof(stateid->data));
896         encode_string(xdr, name->len, name->name);
897 }
898
899 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
900 {
901         encode_openhdr(xdr, arg);
902         encode_opentype(xdr, arg);
903         switch (arg->claim) {
904                 case NFS4_OPEN_CLAIM_NULL:
905                         encode_claim_null(xdr, arg->name);
906                         break;
907                 case NFS4_OPEN_CLAIM_PREVIOUS:
908                         encode_claim_previous(xdr, arg->u.delegation_type);
909                         break;
910                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
911                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
912                         break;
913                 default:
914                         BUG();
915         }
916         return 0;
917 }
918
919 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
920 {
921         uint32_t *p;
922
923         RESERVE_SPACE(8+sizeof(arg->stateid.data));
924         WRITE32(OP_OPEN_CONFIRM);
925         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
926         WRITE32(arg->seqid);
927
928         return 0;
929 }
930
931 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
932 {
933         uint32_t *p;
934
935         RESERVE_SPACE(8+sizeof(arg->stateid.data));
936         WRITE32(OP_OPEN_DOWNGRADE);
937         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
938         WRITE32(arg->seqid);
939         encode_share_access(xdr, arg->open_flags);
940         return 0;
941 }
942
943 static int
944 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
945 {
946         int len = fh->size;
947         uint32_t *p;
948
949         RESERVE_SPACE(8 + len);
950         WRITE32(OP_PUTFH);
951         WRITE32(len);
952         WRITEMEM(fh->data, len);
953
954         return 0;
955 }
956
957 static int encode_putrootfh(struct xdr_stream *xdr)
958 {
959         uint32_t *p;
960         
961         RESERVE_SPACE(4);
962         WRITE32(OP_PUTROOTFH);
963
964         return 0;
965 }
966
967 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
968 {
969         nfs4_stateid stateid;
970         uint32_t *p;
971
972         RESERVE_SPACE(16);
973         if (ctx->state != NULL) {
974                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
975                 WRITEMEM(stateid.data, sizeof(stateid.data));
976         } else
977                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
978 }
979
980 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
981 {
982         uint32_t *p;
983
984         RESERVE_SPACE(4);
985         WRITE32(OP_READ);
986
987         encode_stateid(xdr, args->context);
988
989         RESERVE_SPACE(12);
990         WRITE64(args->offset);
991         WRITE32(args->count);
992
993         return 0;
994 }
995
996 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
997 {
998         struct rpc_auth *auth = req->rq_task->tk_auth;
999         int replen;
1000         uint32_t *p;
1001
1002         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1003         WRITE32(OP_READDIR);
1004         WRITE64(readdir->cookie);
1005         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1006         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1007         WRITE32(readdir->count);
1008         WRITE32(2);
1009         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1010                 WRITE32(0);
1011                 WRITE32(FATTR4_WORD1_MOUNTED_ON_FILEID);
1012         } else {
1013                 WRITE32(FATTR4_WORD0_FILEID);
1014                 WRITE32(0);
1015         }
1016
1017         /* set up reply kvec
1018          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1019          *      + OP_READDIR + status + verifer(2)  = 9
1020          */
1021         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1022         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1023                          readdir->pgbase, readdir->count);
1024
1025         return 0;
1026 }
1027
1028 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1029 {
1030         struct rpc_auth *auth = req->rq_task->tk_auth;
1031         unsigned int replen;
1032         uint32_t *p;
1033
1034         RESERVE_SPACE(4);
1035         WRITE32(OP_READLINK);
1036
1037         /* set up reply kvec
1038          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1039          *      + OP_READLINK + status + string length = 8
1040          */
1041         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1042         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1043                         readlink->pgbase, readlink->pglen);
1044         
1045         return 0;
1046 }
1047
1048 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1049 {
1050         uint32_t *p;
1051
1052         RESERVE_SPACE(8 + name->len);
1053         WRITE32(OP_REMOVE);
1054         WRITE32(name->len);
1055         WRITEMEM(name->name, name->len);
1056
1057         return 0;
1058 }
1059
1060 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1061 {
1062         uint32_t *p;
1063
1064         RESERVE_SPACE(8 + oldname->len);
1065         WRITE32(OP_RENAME);
1066         WRITE32(oldname->len);
1067         WRITEMEM(oldname->name, oldname->len);
1068         
1069         RESERVE_SPACE(4 + newname->len);
1070         WRITE32(newname->len);
1071         WRITEMEM(newname->name, newname->len);
1072
1073         return 0;
1074 }
1075
1076 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1077 {
1078         uint32_t *p;
1079
1080         RESERVE_SPACE(12);
1081         WRITE32(OP_RENEW);
1082         WRITE64(client_stateid->cl_clientid);
1083
1084         return 0;
1085 }
1086
1087 static int
1088 encode_savefh(struct xdr_stream *xdr)
1089 {
1090         uint32_t *p;
1091
1092         RESERVE_SPACE(4);
1093         WRITE32(OP_SAVEFH);
1094
1095         return 0;
1096 }
1097
1098 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1099 {
1100         int status;
1101         uint32_t *p;
1102         
1103         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1104         WRITE32(OP_SETATTR);
1105         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1106
1107         if ((status = encode_attrs(xdr, arg->iap, server)))
1108                 return status;
1109
1110         return 0;
1111 }
1112
1113 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1114 {
1115         uint32_t *p;
1116
1117         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1118         WRITE32(OP_SETCLIENTID);
1119         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1120
1121         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1122         RESERVE_SPACE(4);
1123         WRITE32(setclientid->sc_prog);
1124         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1125         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1126         RESERVE_SPACE(4);
1127         WRITE32(setclientid->sc_cb_ident);
1128
1129         return 0;
1130 }
1131
1132 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1133 {
1134         uint32_t *p;
1135
1136         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1137         WRITE32(OP_SETCLIENTID_CONFIRM);
1138         WRITE64(client_state->cl_clientid);
1139         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1140
1141         return 0;
1142 }
1143
1144 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1145 {
1146         uint32_t *p;
1147
1148         RESERVE_SPACE(4);
1149         WRITE32(OP_WRITE);
1150
1151         encode_stateid(xdr, args->context);
1152
1153         RESERVE_SPACE(16);
1154         WRITE64(args->offset);
1155         WRITE32(args->stable);
1156         WRITE32(args->count);
1157
1158         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1159
1160         return 0;
1161 }
1162
1163 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1164 {
1165         uint32_t *p;
1166
1167         RESERVE_SPACE(20);
1168
1169         WRITE32(OP_DELEGRETURN);
1170         WRITEMEM(stateid->data, sizeof(stateid->data));
1171         return 0;
1172
1173 }
1174 /*
1175  * END OF "GENERIC" ENCODE ROUTINES.
1176  */
1177
1178 /*
1179  * Encode an ACCESS request
1180  */
1181 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1182 {
1183         struct xdr_stream xdr;
1184         struct compound_hdr hdr = {
1185                 .nops = 2,
1186         };
1187         int status;
1188
1189         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1190         encode_compound_hdr(&xdr, &hdr);
1191         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1192                 status = encode_access(&xdr, args->access);
1193         return status;
1194 }
1195
1196 /*
1197  * Encode LOOKUP request
1198  */
1199 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1200 {
1201         struct xdr_stream xdr;
1202         struct compound_hdr hdr = {
1203                 .nops = 4,
1204         };
1205         int status;
1206
1207         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1208         encode_compound_hdr(&xdr, &hdr);
1209         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1210                 goto out;
1211         if ((status = encode_lookup(&xdr, args->name)) != 0)
1212                 goto out;
1213         if ((status = encode_getfh(&xdr)) != 0)
1214                 goto out;
1215         status = encode_getfattr(&xdr, args->bitmask);
1216 out:
1217         return status;
1218 }
1219
1220 /*
1221  * Encode LOOKUP_ROOT request
1222  */
1223 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1224 {
1225         struct xdr_stream xdr;
1226         struct compound_hdr hdr = {
1227                 .nops = 3,
1228         };
1229         int status;
1230
1231         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1232         encode_compound_hdr(&xdr, &hdr);
1233         if ((status = encode_putrootfh(&xdr)) != 0)
1234                 goto out;
1235         if ((status = encode_getfh(&xdr)) == 0)
1236                 status = encode_getfattr(&xdr, args->bitmask);
1237 out:
1238         return status;
1239 }
1240
1241 /*
1242  * Encode REMOVE request
1243  */
1244 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1245 {
1246         struct xdr_stream xdr;
1247         struct compound_hdr hdr = {
1248                 .nops = 2,
1249         };
1250         int status;
1251
1252         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1253         encode_compound_hdr(&xdr, &hdr);
1254         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1255                 status = encode_remove(&xdr, args->name);
1256         return status;
1257 }
1258
1259 /*
1260  * Encode RENAME request
1261  */
1262 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1263 {
1264         struct xdr_stream xdr;
1265         struct compound_hdr hdr = {
1266                 .nops = 4,
1267         };
1268         int status;
1269
1270         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1271         encode_compound_hdr(&xdr, &hdr);
1272         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1273                 goto out;
1274         if ((status = encode_savefh(&xdr)) != 0)
1275                 goto out;
1276         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1277                 goto out;
1278         status = encode_rename(&xdr, args->old_name, args->new_name);
1279 out:
1280         return status;
1281 }
1282
1283 /*
1284  * Encode LINK request
1285  */
1286 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1287 {
1288         struct xdr_stream xdr;
1289         struct compound_hdr hdr = {
1290                 .nops = 4,
1291         };
1292         int status;
1293
1294         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1295         encode_compound_hdr(&xdr, &hdr);
1296         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1297                 goto out;
1298         if ((status = encode_savefh(&xdr)) != 0)
1299                 goto out;
1300         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1301                 goto out;
1302         status = encode_link(&xdr, args->name);
1303 out:
1304         return status;
1305 }
1306
1307 /*
1308  * Encode CREATE request
1309  */
1310 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1311 {
1312         struct xdr_stream xdr;
1313         struct compound_hdr hdr = {
1314                 .nops = 4,
1315         };
1316         int status;
1317
1318         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1319         encode_compound_hdr(&xdr, &hdr);
1320         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1321                 goto out;
1322         if ((status = encode_create(&xdr, args)) != 0)
1323                 goto out;
1324         if ((status = encode_getfh(&xdr)) != 0)
1325                 goto out;
1326         status = encode_getfattr(&xdr, args->bitmask);
1327 out:
1328         return status;
1329 }
1330
1331 /*
1332  * Encode SYMLINK request
1333  */
1334 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1335 {
1336         return nfs4_xdr_enc_create(req, p, args);
1337 }
1338
1339 /*
1340  * Encode GETATTR request
1341  */
1342 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1343 {
1344         struct xdr_stream xdr;
1345         struct compound_hdr hdr = {
1346                 .nops = 2,
1347         };
1348         int status;
1349
1350         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1351         encode_compound_hdr(&xdr, &hdr);
1352         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1353                 status = encode_getfattr(&xdr, args->bitmask);
1354         return status;
1355 }
1356
1357 /*
1358  * Encode a CLOSE request
1359  */
1360 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1361 {
1362         struct xdr_stream xdr;
1363         struct compound_hdr hdr = {
1364                 .nops   = 2,
1365         };
1366         int status;
1367
1368         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1369         encode_compound_hdr(&xdr, &hdr);
1370         status = encode_putfh(&xdr, args->fh);
1371         if(status)
1372                 goto out;
1373         status = encode_close(&xdr, args);
1374 out:
1375         return status;
1376 }
1377
1378 /*
1379  * Encode an OPEN request
1380  */
1381 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1382 {
1383         struct xdr_stream xdr;
1384         struct compound_hdr hdr = {
1385                 .nops = 4,
1386         };
1387         int status;
1388
1389         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1390         encode_compound_hdr(&xdr, &hdr);
1391         status = encode_putfh(&xdr, args->fh);
1392         if (status)
1393                 goto out;
1394         status = encode_open(&xdr, args);
1395         if (status)
1396                 goto out;
1397         status = encode_getfh(&xdr);
1398         if (status)
1399                 goto out;
1400         status = encode_getfattr(&xdr, args->bitmask);
1401 out:
1402         return status;
1403 }
1404
1405 /*
1406  * Encode an OPEN_CONFIRM request
1407  */
1408 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1409 {
1410         struct xdr_stream xdr;
1411         struct compound_hdr hdr = {
1412                 .nops   = 2,
1413         };
1414         int status;
1415
1416         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1417         encode_compound_hdr(&xdr, &hdr);
1418         status = encode_putfh(&xdr, args->fh);
1419         if(status)
1420                 goto out;
1421         status = encode_open_confirm(&xdr, args);
1422 out:
1423         return status;
1424 }
1425
1426 /*
1427  * Encode an OPEN request with no attributes.
1428  */
1429 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1430 {
1431         struct xdr_stream xdr;
1432         struct compound_hdr hdr = {
1433                 .nops   = 2,
1434         };
1435         int status;
1436
1437         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1438         encode_compound_hdr(&xdr, &hdr);
1439         status = encode_putfh(&xdr, args->fh);
1440         if (status)
1441                 goto out;
1442         status = encode_open(&xdr, args);
1443 out:
1444         return status;
1445 }
1446
1447 /*
1448  * Encode an OPEN_DOWNGRADE request
1449  */
1450 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1451 {
1452         struct xdr_stream xdr;
1453         struct compound_hdr hdr = {
1454                 .nops   = 2,
1455         };
1456         int status;
1457
1458         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1459         encode_compound_hdr(&xdr, &hdr);
1460         status = encode_putfh(&xdr, args->fh);
1461         if (status)
1462                 goto out;
1463         status = encode_open_downgrade(&xdr, args);
1464 out:
1465         return status;
1466 }
1467
1468 /*
1469  * Encode a LOCK request
1470  */
1471 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1472 {
1473         struct xdr_stream xdr;
1474         struct compound_hdr hdr = {
1475                 .nops   = 2,
1476         };
1477         int status;
1478
1479         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1480         encode_compound_hdr(&xdr, &hdr);
1481         status = encode_putfh(&xdr, args->fh);
1482         if(status)
1483                 goto out;
1484         status = encode_lock(&xdr, args);
1485 out:
1486         return status;
1487 }
1488
1489 /*
1490  * Encode a LOCKT request
1491  */
1492 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1493 {
1494         struct xdr_stream xdr;
1495         struct compound_hdr hdr = {
1496                 .nops   = 2,
1497         };
1498         int status;
1499
1500         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1501         encode_compound_hdr(&xdr, &hdr);
1502         status = encode_putfh(&xdr, args->fh);
1503         if(status)
1504                 goto out;
1505         status = encode_lockt(&xdr, args);
1506 out:
1507         return status;
1508 }
1509
1510 /*
1511  * Encode a LOCKU request
1512  */
1513 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1514 {
1515         struct xdr_stream xdr;
1516         struct compound_hdr hdr = {
1517                 .nops   = 2,
1518         };
1519         int status;
1520
1521         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1522         encode_compound_hdr(&xdr, &hdr);
1523         status = encode_putfh(&xdr, args->fh);
1524         if(status)
1525                 goto out;
1526         status = encode_locku(&xdr, args);
1527 out:
1528         return status;
1529 }
1530
1531 /*
1532  * Encode a READLINK request
1533  */
1534 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1535 {
1536         struct xdr_stream xdr;
1537         struct compound_hdr hdr = {
1538                 .nops = 2,
1539         };
1540         int status;
1541
1542         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1543         encode_compound_hdr(&xdr, &hdr);
1544         status = encode_putfh(&xdr, args->fh);
1545         if(status)
1546                 goto out;
1547         status = encode_readlink(&xdr, args, req);
1548 out:
1549         return status;
1550 }
1551
1552 /*
1553  * Encode a READDIR request
1554  */
1555 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1556 {
1557         struct xdr_stream xdr;
1558         struct compound_hdr hdr = {
1559                 .nops = 2,
1560         };
1561         int status;
1562
1563         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1564         encode_compound_hdr(&xdr, &hdr);
1565         status = encode_putfh(&xdr, args->fh);
1566         if(status)
1567                 goto out;
1568         status = encode_readdir(&xdr, args, req);
1569 out:
1570         return status;
1571 }
1572
1573 /*
1574  * Encode a READ request
1575  */
1576 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1577 {
1578         struct rpc_auth *auth = req->rq_task->tk_auth;
1579         struct xdr_stream xdr;
1580         struct compound_hdr hdr = {
1581                 .nops = 2,
1582         };
1583         int replen, status;
1584
1585         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1586         encode_compound_hdr(&xdr, &hdr);
1587         status = encode_putfh(&xdr, args->fh);
1588         if (status)
1589                 goto out;
1590         status = encode_read(&xdr, args);
1591         if (status)
1592                 goto out;
1593
1594         /* set up reply kvec
1595          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1596          *       + OP_READ + status + eof + datalen = 9
1597          */
1598         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1599         xdr_inline_pages(&req->rq_rcv_buf, replen,
1600                          args->pages, args->pgbase, args->count);
1601 out:
1602         return status;
1603 }
1604
1605 /*
1606  * Encode an SETATTR request
1607  */
1608 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1609
1610 {
1611         struct xdr_stream xdr;
1612         struct compound_hdr hdr = {
1613                 .nops   = 3,
1614         };
1615         int status;
1616
1617         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1618         encode_compound_hdr(&xdr, &hdr);
1619         status = encode_putfh(&xdr, args->fh);
1620         if(status)
1621                 goto out;
1622         status = encode_setattr(&xdr, args, args->server);
1623         if(status)
1624                 goto out;
1625         status = encode_getfattr(&xdr, args->bitmask);
1626 out:
1627         return status;
1628 }
1629
1630 /*
1631  * Encode a WRITE request
1632  */
1633 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1634 {
1635         struct xdr_stream xdr;
1636         struct compound_hdr hdr = {
1637                 .nops = 2,
1638         };
1639         int status;
1640
1641         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1642         encode_compound_hdr(&xdr, &hdr);
1643         status = encode_putfh(&xdr, args->fh);
1644         if (status)
1645                 goto out;
1646         status = encode_write(&xdr, args);
1647 out:
1648         return status;
1649 }
1650
1651 /*
1652  *  a COMMIT request
1653  */
1654 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1655 {
1656         struct xdr_stream xdr;
1657         struct compound_hdr hdr = {
1658                 .nops = 2,
1659         };
1660         int status;
1661
1662         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1663         encode_compound_hdr(&xdr, &hdr);
1664         status = encode_putfh(&xdr, args->fh);
1665         if (status)
1666                 goto out;
1667         status = encode_commit(&xdr, args);
1668 out:
1669         return status;
1670 }
1671
1672 /*
1673  * FSINFO request
1674  */
1675 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1676 {
1677         struct xdr_stream xdr;
1678         struct compound_hdr hdr = {
1679                 .nops   = 2,
1680         };
1681         int status;
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, &hdr);
1685         status = encode_putfh(&xdr, args->fh);
1686         if (!status)
1687                 status = encode_fsinfo(&xdr, args->bitmask);
1688         return status;
1689 }
1690
1691 /*
1692  * a PATHCONF request
1693  */
1694 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1695 {
1696         struct xdr_stream xdr;
1697         struct compound_hdr hdr = {
1698                 .nops = 2,
1699         };
1700         int status;
1701
1702         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703         encode_compound_hdr(&xdr, &hdr);
1704         status = encode_putfh(&xdr, args->fh);
1705         if (!status)
1706                 status = encode_getattr_one(&xdr,
1707                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1708         return status;
1709 }
1710
1711 /*
1712  * a STATFS request
1713  */
1714 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1715 {
1716         struct xdr_stream xdr;
1717         struct compound_hdr hdr = {
1718                 .nops = 2,
1719         };
1720         int status;
1721
1722         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1723         encode_compound_hdr(&xdr, &hdr);
1724         status = encode_putfh(&xdr, args->fh);
1725         if (status == 0)
1726                 status = encode_getattr_two(&xdr,
1727                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1728                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1729         return status;
1730 }
1731
1732 /*
1733  * GETATTR_BITMAP request
1734  */
1735 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1736 {
1737         struct xdr_stream xdr;
1738         struct compound_hdr hdr = {
1739                 .nops = 2,
1740         };
1741         int status;
1742
1743         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744         encode_compound_hdr(&xdr, &hdr);
1745         status = encode_putfh(&xdr, fhandle);
1746         if (status == 0)
1747                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1748                                 FATTR4_WORD0_LINK_SUPPORT|
1749                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1750                                 FATTR4_WORD0_ACLSUPPORT);
1751         return status;
1752 }
1753
1754 /*
1755  * a RENEW request
1756  */
1757 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1758 {
1759         struct xdr_stream xdr;
1760         struct compound_hdr hdr = {
1761                 .nops   = 1,
1762         };
1763
1764         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1765         encode_compound_hdr(&xdr, &hdr);
1766         return encode_renew(&xdr, clp);
1767 }
1768
1769 /*
1770  * a SETCLIENTID request
1771  */
1772 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1773 {
1774         struct xdr_stream xdr;
1775         struct compound_hdr hdr = {
1776                 .nops   = 1,
1777         };
1778
1779         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1780         encode_compound_hdr(&xdr, &hdr);
1781         return encode_setclientid(&xdr, sc);
1782 }
1783
1784 /*
1785  * a SETCLIENTID_CONFIRM request
1786  */
1787 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1788 {
1789         struct xdr_stream xdr;
1790         struct compound_hdr hdr = {
1791                 .nops   = 3,
1792         };
1793         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1794         int status;
1795
1796         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1797         encode_compound_hdr(&xdr, &hdr);
1798         status = encode_setclientid_confirm(&xdr, clp);
1799         if (!status)
1800                 status = encode_putrootfh(&xdr);
1801         if (!status)
1802                 status = encode_fsinfo(&xdr, lease_bitmap);
1803         return status;
1804 }
1805
1806 /*
1807  * DELEGRETURN request
1808  */
1809 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1810 {
1811         struct xdr_stream xdr;
1812         struct compound_hdr hdr = {
1813                 .nops = 2,
1814         };
1815         int status;
1816
1817         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1818         encode_compound_hdr(&xdr, &hdr);
1819         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1820                 status = encode_delegreturn(&xdr, args->stateid);
1821         return status;
1822 }
1823
1824 /*
1825  * START OF "GENERIC" DECODE ROUTINES.
1826  *   These may look a little ugly since they are imported from a "generic"
1827  * set of XDR encode/decode routines which are intended to be shared by
1828  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1829  *
1830  * If the pain of reading these is too great, it should be a straightforward
1831  * task to translate them into Linux-specific versions which are more
1832  * consistent with the style used in NFSv2/v3...
1833  */
1834 #define READ32(x)         (x) = ntohl(*p++)
1835 #define READ64(x)         do {                  \
1836         (x) = (u64)ntohl(*p++) << 32;           \
1837         (x) |= ntohl(*p++);                     \
1838 } while (0)
1839 #define READTIME(x)       do {                  \
1840         p++;                                    \
1841         (x.tv_sec) = ntohl(*p++);               \
1842         (x.tv_nsec) = ntohl(*p++);              \
1843 } while (0)
1844 #define COPYMEM(x,nbytes) do {                  \
1845         memcpy((x), p, nbytes);                 \
1846         p += XDR_QUADLEN(nbytes);               \
1847 } while (0)
1848
1849 #define READ_BUF(nbytes)  do { \
1850         p = xdr_inline_decode(xdr, nbytes); \
1851         if (!p) { \
1852                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
1853                                 __FUNCTION__, __LINE__); \
1854                 return -EIO; \
1855         } \
1856 } while (0)
1857
1858 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
1859 {
1860         uint32_t *p;
1861
1862         READ_BUF(4);
1863         READ32(*len);
1864         READ_BUF(*len);
1865         *string = (char *)p;
1866         return 0;
1867 }
1868
1869 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
1870 {
1871         uint32_t *p;
1872
1873         READ_BUF(8);
1874         READ32(hdr->status);
1875         READ32(hdr->taglen);
1876         
1877         READ_BUF(hdr->taglen + 4);
1878         hdr->tag = (char *)p;
1879         p += XDR_QUADLEN(hdr->taglen);
1880         READ32(hdr->nops);
1881         return 0;
1882 }
1883
1884 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
1885 {
1886         uint32_t *p;
1887         uint32_t opnum;
1888         int32_t nfserr;
1889
1890         READ_BUF(8);
1891         READ32(opnum);
1892         if (opnum != expected) {
1893                 printk(KERN_NOTICE
1894                                 "nfs4_decode_op_hdr: Server returned operation"
1895                                 " %d but we issued a request for %d\n",
1896                                 opnum, expected);
1897                 return -EIO;
1898         }
1899         READ32(nfserr);
1900         if (nfserr != NFS_OK)
1901                 return -nfs_stat_to_errno(nfserr);
1902         return 0;
1903 }
1904
1905 /* Dummy routine */
1906 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
1907 {
1908         uint32_t *p;
1909         uint32_t strlen;
1910         char *str;
1911
1912         READ_BUF(12);
1913         return decode_opaque_inline(xdr, &strlen, &str);
1914 }
1915
1916 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
1917 {
1918         uint32_t bmlen, *p;
1919
1920         READ_BUF(4);
1921         READ32(bmlen);
1922
1923         bitmap[0] = bitmap[1] = 0;
1924         READ_BUF((bmlen << 2));
1925         if (bmlen > 0) {
1926                 READ32(bitmap[0]);
1927                 if (bmlen > 1)
1928                         READ32(bitmap[1]);
1929         }
1930         return 0;
1931 }
1932
1933 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
1934 {
1935         uint32_t *p;
1936
1937         READ_BUF(4);
1938         READ32(*attrlen);
1939         *savep = xdr->p;
1940         return 0;
1941 }
1942
1943 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
1944 {
1945         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
1946                 decode_attr_bitmap(xdr, bitmask);
1947                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
1948         } else
1949                 bitmask[0] = bitmask[1] = 0;
1950         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
1951         return 0;
1952 }
1953
1954 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
1955 {
1956         uint32_t *p;
1957
1958         *type = 0;
1959         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
1960                 return -EIO;
1961         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
1962                 READ_BUF(4);
1963                 READ32(*type);
1964                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
1965                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
1966                         return -EIO;
1967                 }
1968                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
1969         }
1970         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
1971         return 0;
1972 }
1973
1974 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
1975 {
1976         uint32_t *p;
1977
1978         *change = 0;
1979         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
1980                 return -EIO;
1981         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
1982                 READ_BUF(8);
1983                 READ64(*change);
1984                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
1985         }
1986         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
1987                         (unsigned long long)*change);
1988         return 0;
1989 }
1990
1991 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
1992 {
1993         uint32_t *p;
1994
1995         *size = 0;
1996         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
1997                 return -EIO;
1998         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
1999                 READ_BUF(8);
2000                 READ64(*size);
2001                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2002         }
2003         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2004         return 0;
2005 }
2006
2007 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2008 {
2009         uint32_t *p;
2010
2011         *res = 0;
2012         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2013                 return -EIO;
2014         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2015                 READ_BUF(4);
2016                 READ32(*res);
2017                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2018         }
2019         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2020         return 0;
2021 }
2022
2023 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2024 {
2025         uint32_t *p;
2026
2027         *res = 0;
2028         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2029                 return -EIO;
2030         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2031                 READ_BUF(4);
2032                 READ32(*res);
2033                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2034         }
2035         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2036         return 0;
2037 }
2038
2039 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2040 {
2041         uint32_t *p;
2042
2043         fsid->major = 0;
2044         fsid->minor = 0;
2045         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2046                 return -EIO;
2047         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2048                 READ_BUF(16);
2049                 READ64(fsid->major);
2050                 READ64(fsid->minor);
2051                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2052         }
2053         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2054                         (unsigned long long)fsid->major,
2055                         (unsigned long long)fsid->minor);
2056         return 0;
2057 }
2058
2059 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2060 {
2061         uint32_t *p;
2062
2063         *res = 60;
2064         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2065                 return -EIO;
2066         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2067                 READ_BUF(4);
2068                 READ32(*res);
2069                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2070         }
2071         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2072         return 0;
2073 }
2074
2075 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2076 {
2077         uint32_t *p;
2078
2079         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2080         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2081                 return -EIO;
2082         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2083                 READ_BUF(4);
2084                 READ32(*res);
2085                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2086         }
2087         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2088         return 0;
2089 }
2090
2091 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2092 {
2093         uint32_t *p;
2094
2095         *fileid = 0;
2096         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2097                 return -EIO;
2098         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2099                 READ_BUF(8);
2100                 READ64(*fileid);
2101                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2102         }
2103         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2104         return 0;
2105 }
2106
2107 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2108 {
2109         uint32_t *p;
2110         int status = 0;
2111
2112         *res = 0;
2113         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2114                 return -EIO;
2115         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2116                 READ_BUF(8);
2117                 READ64(*res);
2118                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2119         }
2120         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2121         return status;
2122 }
2123
2124 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2125 {
2126         uint32_t *p;
2127         int status = 0;
2128
2129         *res = 0;
2130         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2131                 return -EIO;
2132         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2133                 READ_BUF(8);
2134                 READ64(*res);
2135                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2136         }
2137         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2138         return status;
2139 }
2140
2141 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2142 {
2143         uint32_t *p;
2144         int status = 0;
2145
2146         *res = 0;
2147         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2148                 return -EIO;
2149         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2150                 READ_BUF(8);
2151                 READ64(*res);
2152                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2153         }
2154         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2155         return status;
2156 }
2157
2158 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2159 {
2160         uint32_t *p;
2161         int status = 0;
2162
2163         *res = 0;
2164         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2165                 return -EIO;
2166         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2167                 READ_BUF(8);
2168                 READ64(*res);
2169                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2170         }
2171         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2172         return status;
2173 }
2174
2175 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2176 {
2177         uint32_t *p;
2178         int status = 0;
2179
2180         *maxlink = 1;
2181         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2182                 return -EIO;
2183         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2184                 READ_BUF(4);
2185                 READ32(*maxlink);
2186                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2187         }
2188         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2189         return status;
2190 }
2191
2192 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2193 {
2194         uint32_t *p;
2195         int status = 0;
2196
2197         *maxname = 1024;
2198         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2199                 return -EIO;
2200         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2201                 READ_BUF(4);
2202                 READ32(*maxname);
2203                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2204         }
2205         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2206         return status;
2207 }
2208
2209 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2210 {
2211         uint32_t *p;
2212         int status = 0;
2213
2214         *res = 1024;
2215         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2216                 return -EIO;
2217         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2218                 uint64_t maxread;
2219                 READ_BUF(8);
2220                 READ64(maxread);
2221                 if (maxread > 0x7FFFFFFF)
2222                         maxread = 0x7FFFFFFF;
2223                 *res = (uint32_t)maxread;
2224                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2225         }
2226         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2227         return status;
2228 }
2229
2230 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2231 {
2232         uint32_t *p;
2233         int status = 0;
2234
2235         *res = 1024;
2236         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2237                 return -EIO;
2238         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2239                 uint64_t maxwrite;
2240                 READ_BUF(8);
2241                 READ64(maxwrite);
2242                 if (maxwrite > 0x7FFFFFFF)
2243                         maxwrite = 0x7FFFFFFF;
2244                 *res = (uint32_t)maxwrite;
2245                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2246         }
2247         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2248         return status;
2249 }
2250
2251 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2252 {
2253         uint32_t *p;
2254
2255         *mode = 0;
2256         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2257                 return -EIO;
2258         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2259                 READ_BUF(4);
2260                 READ32(*mode);
2261                 *mode &= ~S_IFMT;
2262                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2263         }
2264         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2265         return 0;
2266 }
2267
2268 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2269 {
2270         uint32_t *p;
2271
2272         *nlink = 1;
2273         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2274                 return -EIO;
2275         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2276                 READ_BUF(4);
2277                 READ32(*nlink);
2278                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2279         }
2280         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2281         return 0;
2282 }
2283
2284 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2285 {
2286         uint32_t len, *p;
2287
2288         *uid = -2;
2289         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2290                 return -EIO;
2291         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2292                 READ_BUF(4);
2293                 READ32(len);
2294                 READ_BUF(len);
2295                 if (len < XDR_MAX_NETOBJ) {
2296                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2297                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2298                                                 __FUNCTION__);
2299                 } else
2300                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2301                                         __FUNCTION__, len);
2302                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2303         }
2304         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2305         return 0;
2306 }
2307
2308 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2309 {
2310         uint32_t len, *p;
2311
2312         *gid = -2;
2313         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2314                 return -EIO;
2315         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2316                 READ_BUF(4);
2317                 READ32(len);
2318                 READ_BUF(len);
2319                 if (len < XDR_MAX_NETOBJ) {
2320                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2321                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2322                                                 __FUNCTION__);
2323                 } else
2324                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2325                                         __FUNCTION__, len);
2326                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2327         }
2328         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2329         return 0;
2330 }
2331
2332 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2333 {
2334         uint32_t major = 0, minor = 0, *p;
2335
2336         *rdev = MKDEV(0,0);
2337         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2338                 return -EIO;
2339         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2340                 dev_t tmp;
2341
2342                 READ_BUF(8);
2343                 READ32(major);
2344                 READ32(minor);
2345                 tmp = MKDEV(major, minor);
2346                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2347                         *rdev = tmp;
2348                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2349         }
2350         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2351         return 0;
2352 }
2353
2354 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2355 {
2356         uint32_t *p;
2357         int status = 0;
2358
2359         *res = 0;
2360         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2361                 return -EIO;
2362         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2363                 READ_BUF(8);
2364                 READ64(*res);
2365                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2366         }
2367         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2368         return status;
2369 }
2370
2371 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2372 {
2373         uint32_t *p;
2374         int status = 0;
2375
2376         *res = 0;
2377         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2378                 return -EIO;
2379         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2380                 READ_BUF(8);
2381                 READ64(*res);
2382                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2383         }
2384         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2385         return status;
2386 }
2387
2388 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2389 {
2390         uint32_t *p;
2391         int status = 0;
2392
2393         *res = 0;
2394         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2395                 return -EIO;
2396         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2397                 READ_BUF(8);
2398                 READ64(*res);
2399                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2400         }
2401         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2402         return status;
2403 }
2404
2405 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2406 {
2407         uint32_t *p;
2408
2409         *used = 0;
2410         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2411                 return -EIO;
2412         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2413                 READ_BUF(8);
2414                 READ64(*used);
2415                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2416         }
2417         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2418                         (unsigned long long)*used);
2419         return 0;
2420 }
2421
2422 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2423 {
2424         uint32_t *p;
2425         uint64_t sec;
2426         uint32_t nsec;
2427
2428         READ_BUF(12);
2429         READ64(sec);
2430         READ32(nsec);
2431         time->tv_sec = (time_t)sec;
2432         time->tv_nsec = (long)nsec;
2433         return 0;
2434 }
2435
2436 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2437 {
2438         int status = 0;
2439
2440         time->tv_sec = 0;
2441         time->tv_nsec = 0;
2442         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2443                 return -EIO;
2444         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2445                 status = decode_attr_time(xdr, time);
2446                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2447         }
2448         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2449         return status;
2450 }
2451
2452 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2453 {
2454         int status = 0;
2455
2456         time->tv_sec = 0;
2457         time->tv_nsec = 0;
2458         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2459                 return -EIO;
2460         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2461                 status = decode_attr_time(xdr, time);
2462                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2463         }
2464         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2465         return status;
2466 }
2467
2468 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2469 {
2470         int status = 0;
2471
2472         time->tv_sec = 0;
2473         time->tv_nsec = 0;
2474         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2475                 return -EIO;
2476         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2477                 status = decode_attr_time(xdr, time);
2478                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2479         }
2480         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2481         return status;
2482 }
2483
2484 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2485 {
2486         unsigned int attrwords = XDR_QUADLEN(attrlen);
2487         unsigned int nwords = xdr->p - savep;
2488
2489         if (unlikely(attrwords != nwords)) {
2490                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2491                                 __FUNCTION__,
2492                                 attrwords << 2,
2493                                 (attrwords < nwords) ? '<' : '>',
2494                                 nwords << 2);
2495                 return -EIO;
2496         }
2497         return 0;
2498 }
2499
2500 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2501 {
2502         uint32_t *p;
2503
2504         READ_BUF(20);
2505         READ32(cinfo->atomic);
2506         READ64(cinfo->before);
2507         READ64(cinfo->after);
2508         return 0;
2509 }
2510
2511 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2512 {
2513         uint32_t *p;
2514         uint32_t supp, acc;
2515         int status;
2516
2517         status = decode_op_hdr(xdr, OP_ACCESS);
2518         if (status)
2519                 return status;
2520         READ_BUF(8);
2521         READ32(supp);
2522         READ32(acc);
2523         access->supported = supp;
2524         access->access = acc;
2525         return 0;
2526 }
2527
2528 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2529 {
2530         uint32_t *p;
2531         int status;
2532
2533         status = decode_op_hdr(xdr, OP_CLOSE);
2534         if (status)
2535                 return status;
2536         READ_BUF(sizeof(res->stateid.data));
2537         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2538         return 0;
2539 }
2540
2541 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2542 {
2543         uint32_t *p;
2544         int status;
2545
2546         status = decode_op_hdr(xdr, OP_COMMIT);
2547         if (status)
2548                 return status;
2549         READ_BUF(8);
2550         COPYMEM(res->verf->verifier, 8);
2551         return 0;
2552 }
2553
2554 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2555 {
2556         uint32_t *p;
2557         uint32_t bmlen;
2558         int status;
2559
2560         status = decode_op_hdr(xdr, OP_CREATE);
2561         if (status)
2562                 return status;
2563         if ((status = decode_change_info(xdr, cinfo)))
2564                 return status;
2565         READ_BUF(4);
2566         READ32(bmlen);
2567         READ_BUF(bmlen << 2);
2568         return 0;
2569 }
2570
2571 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2572 {
2573         uint32_t *savep;
2574         uint32_t attrlen, 
2575                  bitmap[2] = {0};
2576         int status;
2577
2578         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2579                 goto xdr_error;
2580         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2581                 goto xdr_error;
2582         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2583                 goto xdr_error;
2584         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2585                 goto xdr_error;
2586         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2587                 goto xdr_error;
2588         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2589                 goto xdr_error;
2590         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2591                 goto xdr_error;
2592         status = verify_attr_len(xdr, savep, attrlen);
2593 xdr_error:
2594         if (status != 0)
2595                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2596         return status;
2597 }
2598         
2599 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2600 {
2601         uint32_t *savep;
2602         uint32_t attrlen, 
2603                  bitmap[2] = {0};
2604         int status;
2605         
2606         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2607                 goto xdr_error;
2608         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2609                 goto xdr_error;
2610         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2611                 goto xdr_error;
2612
2613         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2614                 goto xdr_error;
2615         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2616                 goto xdr_error;
2617         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2618                 goto xdr_error;
2619         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2620                 goto xdr_error;
2621         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2622                 goto xdr_error;
2623         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2624                 goto xdr_error;
2625
2626         status = verify_attr_len(xdr, savep, attrlen);
2627 xdr_error:
2628         if (status != 0)
2629                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2630         return status;
2631 }
2632
2633 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2634 {
2635         uint32_t *savep;
2636         uint32_t attrlen, 
2637                  bitmap[2] = {0};
2638         int status;
2639         
2640         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2641                 goto xdr_error;
2642         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2643                 goto xdr_error;
2644         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2645                 goto xdr_error;
2646
2647         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2648                 goto xdr_error;
2649         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2650                 goto xdr_error;
2651
2652         status = verify_attr_len(xdr, savep, attrlen);
2653 xdr_error:
2654         if (status != 0)
2655                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2656         return status;
2657 }
2658
2659 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2660 {
2661         uint32_t *savep;
2662         uint32_t attrlen,
2663                  bitmap[2] = {0},
2664                  type;
2665         int status, fmode = 0;
2666
2667         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2668                 goto xdr_error;
2669         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2670                 goto xdr_error;
2671
2672         fattr->bitmap[0] = bitmap[0];
2673         fattr->bitmap[1] = bitmap[1];
2674
2675         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2676                 goto xdr_error;
2677
2678
2679         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2680                 goto xdr_error;
2681         fattr->type = nfs_type2fmt[type].nfs2type;
2682         fmode = nfs_type2fmt[type].mode;
2683
2684         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2685                 goto xdr_error;
2686         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2687                 goto xdr_error;
2688         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2689                 goto xdr_error;
2690         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2691                 goto xdr_error;
2692         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2693                 goto xdr_error;
2694         fattr->mode |= fmode;
2695         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2696                 goto xdr_error;
2697         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2698                 goto xdr_error;
2699         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2700                 goto xdr_error;
2701         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2702                 goto xdr_error;
2703         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2704                 goto xdr_error;
2705         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2706                 goto xdr_error;
2707         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2708                 goto xdr_error;
2709         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2710                 goto xdr_error;
2711         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) {
2712                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2713                 fattr->timestamp = jiffies;
2714         }
2715 xdr_error:
2716         if (status != 0)
2717                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2718         return status;
2719 }
2720
2721
2722 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2723 {
2724         uint32_t *savep;
2725         uint32_t attrlen, bitmap[2];
2726         int status;
2727
2728         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2729                 goto xdr_error;
2730         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2731                 goto xdr_error;
2732         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2733                 goto xdr_error;
2734
2735         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2736
2737         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2738                 goto xdr_error;
2739         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2740                 goto xdr_error;
2741         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2742                 goto xdr_error;
2743         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2744         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2745                 goto xdr_error;
2746         fsinfo->wtpref = fsinfo->wtmax;
2747
2748         status = verify_attr_len(xdr, savep, attrlen);
2749 xdr_error:
2750         if (status != 0)
2751                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2752         return status;
2753 }
2754
2755 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2756 {
2757         uint32_t *p;
2758         uint32_t len;
2759         int status;
2760
2761         status = decode_op_hdr(xdr, OP_GETFH);
2762         if (status)
2763                 return status;
2764         /* Zero handle first to allow comparisons */
2765         memset(fh, 0, sizeof(*fh));
2766
2767         READ_BUF(4);
2768         READ32(len);
2769         if (len > NFS4_FHSIZE)
2770                 return -EIO;
2771         fh->size = len;
2772         READ_BUF(len);
2773         COPYMEM(fh->data, len);
2774         return 0;
2775 }
2776
2777 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2778 {
2779         int status;
2780         
2781         status = decode_op_hdr(xdr, OP_LINK);
2782         if (status)
2783                 return status;
2784         return decode_change_info(xdr, cinfo);
2785 }
2786
2787 /*
2788  * We create the owner, so we know a proper owner.id length is 4.
2789  */
2790 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2791 {
2792         uint32_t *p;
2793         uint32_t namelen;
2794
2795         READ_BUF(32);
2796         READ64(denied->offset);
2797         READ64(denied->length);
2798         READ32(denied->type);
2799         READ64(denied->owner.clientid);
2800         READ32(namelen);
2801         READ_BUF(namelen);
2802         if (namelen == 4)
2803                 READ32(denied->owner.id);
2804         return -NFS4ERR_DENIED;
2805 }
2806
2807 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2808 {
2809         uint32_t *p;
2810         int status;
2811
2812         status = decode_op_hdr(xdr, OP_LOCK);
2813         if (status == 0) {
2814                 READ_BUF(sizeof(nfs4_stateid));
2815                 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2816         } else if (status == -NFS4ERR_DENIED)
2817                 return decode_lock_denied(xdr, &res->u.denied);
2818         return status;
2819 }
2820
2821 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2822 {
2823         int status;
2824         status = decode_op_hdr(xdr, OP_LOCKT);
2825         if (status == -NFS4ERR_DENIED)
2826                 return decode_lock_denied(xdr, &res->u.denied);
2827         return status;
2828 }
2829
2830 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2831 {
2832         uint32_t *p;
2833         int status;
2834
2835         status = decode_op_hdr(xdr, OP_LOCKU);
2836         if (status == 0) {
2837                 READ_BUF(sizeof(nfs4_stateid));
2838                 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2839         }
2840         return status;
2841 }
2842
2843 static int decode_lookup(struct xdr_stream *xdr)
2844 {
2845         return decode_op_hdr(xdr, OP_LOOKUP);
2846 }
2847
2848 /* This is too sick! */
2849 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
2850 {
2851         uint32_t *p;
2852         uint32_t limit_type, nblocks, blocksize;
2853
2854         READ_BUF(12);
2855         READ32(limit_type);
2856         switch (limit_type) {
2857                 case 1:
2858                         READ64(*maxsize);
2859                         break;
2860                 case 2:
2861                         READ32(nblocks);
2862                         READ32(blocksize);
2863                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
2864         }
2865         return 0;
2866 }
2867
2868 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
2869 {
2870         uint32_t *p;
2871         uint32_t delegation_type;
2872
2873         READ_BUF(4);
2874         READ32(delegation_type);
2875         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
2876                 res->delegation_type = 0;
2877                 return 0;
2878         }
2879         READ_BUF(20);
2880         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
2881         READ32(res->do_recall);
2882         switch (delegation_type) {
2883                 case NFS4_OPEN_DELEGATE_READ:
2884                         res->delegation_type = FMODE_READ;
2885                         break;
2886                 case NFS4_OPEN_DELEGATE_WRITE:
2887                         res->delegation_type = FMODE_WRITE|FMODE_READ;
2888                         if (decode_space_limit(xdr, &res->maxsize) < 0)
2889                                 return -EIO;
2890         }
2891         return decode_ace(xdr, NULL, res->server->nfs4_state);
2892 }
2893
2894 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
2895 {
2896         uint32_t *p;
2897         uint32_t bmlen;
2898         int status;
2899
2900         status = decode_op_hdr(xdr, OP_OPEN);
2901         if (status)
2902                 return status;
2903         READ_BUF(sizeof(res->stateid.data));
2904         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2905
2906         decode_change_info(xdr, &res->cinfo);
2907
2908         READ_BUF(8);
2909         READ32(res->rflags);
2910         READ32(bmlen);
2911         if (bmlen > 10)
2912                 goto xdr_error;
2913
2914         READ_BUF(bmlen << 2);
2915         p += bmlen;
2916         return decode_delegation(xdr, res);
2917 xdr_error:
2918         printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
2919         return -EIO;
2920 }
2921
2922 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
2923 {
2924         uint32_t *p;
2925         int status;
2926
2927         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
2928         if (status)
2929                 return status;
2930         READ_BUF(sizeof(res->stateid.data));
2931         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2932         return 0;
2933 }
2934
2935 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
2936 {
2937         uint32_t *p;
2938         int status;
2939
2940         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
2941         if (status)
2942                 return status;
2943         READ_BUF(sizeof(res->stateid.data));
2944         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2945         return 0;
2946 }
2947
2948 static int decode_putfh(struct xdr_stream *xdr)
2949 {
2950         return decode_op_hdr(xdr, OP_PUTFH);
2951 }
2952
2953 static int decode_putrootfh(struct xdr_stream *xdr)
2954 {
2955         return decode_op_hdr(xdr, OP_PUTROOTFH);
2956 }
2957
2958 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
2959 {
2960         struct kvec *iov = req->rq_rcv_buf.head;
2961         uint32_t *p;
2962         uint32_t count, eof, recvd, hdrlen;
2963         int status;
2964
2965         status = decode_op_hdr(xdr, OP_READ);
2966         if (status)
2967                 return status;
2968         READ_BUF(8);
2969         READ32(eof);
2970         READ32(count);
2971         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
2972         recvd = req->rq_rcv_buf.len - hdrlen;
2973         if (count > recvd) {
2974                 printk(KERN_WARNING "NFS: server cheating in read reply: "
2975                                 "count %u > recvd %u\n", count, recvd);
2976                 count = recvd;
2977                 eof = 0;
2978         }
2979         xdr_read_pages(xdr, count);
2980         res->eof = eof;
2981         res->count = count;
2982         return 0;
2983 }
2984
2985 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
2986 {
2987         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
2988         struct page     *page = *rcvbuf->pages;
2989         struct kvec     *iov = rcvbuf->head;
2990         unsigned int    nr, pglen = rcvbuf->page_len;
2991         uint32_t        *end, *entry, *p, *kaddr;
2992         uint32_t        len, attrlen;
2993         int             hdrlen, recvd, status;
2994
2995         status = decode_op_hdr(xdr, OP_READDIR);
2996         if (status)
2997                 return status;
2998         READ_BUF(8);
2999         COPYMEM(readdir->verifier.data, 8);
3000
3001         hdrlen = (char *) p - (char *) iov->iov_base;
3002         recvd = rcvbuf->len - hdrlen;
3003         if (pglen > recvd)
3004                 pglen = recvd;
3005         xdr_read_pages(xdr, pglen);
3006
3007         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3008         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3009         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3010         entry = p;
3011         for (nr = 0; *p++; nr++) {
3012                 if (p + 3 > end)
3013                         goto short_pkt;
3014                 p += 2;                 /* cookie */
3015                 len = ntohl(*p++);      /* filename length */
3016                 if (len > NFS4_MAXNAMLEN) {
3017                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3018                         goto err_unmap;
3019                 }
3020                 p += XDR_QUADLEN(len);
3021                 if (p + 1 > end)
3022                         goto short_pkt;
3023                 len = ntohl(*p++);      /* bitmap length */
3024                 p += len;
3025                 if (p + 1 > end)
3026                         goto short_pkt;
3027                 attrlen = XDR_QUADLEN(ntohl(*p++));
3028                 p += attrlen;           /* attributes */
3029                 if (p + 2 > end)
3030                         goto short_pkt;
3031                 entry = p;
3032         }
3033         if (!nr && (entry[0] != 0 || entry[1] == 0))
3034                 goto short_pkt;
3035 out:    
3036         kunmap_atomic(kaddr, KM_USER0);
3037         return 0;
3038 short_pkt:
3039         entry[0] = entry[1] = 0;
3040         /* truncate listing ? */
3041         if (!nr) {
3042                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3043                 entry[1] = 1;
3044         }
3045         goto out;
3046 err_unmap:
3047         kunmap_atomic(kaddr, KM_USER0);
3048         return -errno_NFSERR_IO;
3049 }
3050
3051 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3052 {
3053         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3054         struct kvec *iov = rcvbuf->head;
3055         int hdrlen, len, recvd;
3056         uint32_t *p;
3057         char *kaddr;
3058         int status;
3059
3060         status = decode_op_hdr(xdr, OP_READLINK);
3061         if (status)
3062                 return status;
3063
3064         /* Convert length of symlink */
3065         READ_BUF(4);
3066         READ32(len);
3067         if (len >= rcvbuf->page_len || len <= 0) {
3068                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3069                 return -ENAMETOOLONG;
3070         }
3071         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3072         recvd = req->rq_rcv_buf.len - hdrlen;
3073         if (recvd < len) {
3074                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3075                                 "count %u > recvd %u\n", len, recvd);
3076                 return -EIO;
3077         }
3078         xdr_read_pages(xdr, len);
3079         /*
3080          * The XDR encode routine has set things up so that
3081          * the link text will be copied directly into the
3082          * buffer.  We just have to do overflow-checking,
3083          * and and null-terminate the text (the VFS expects
3084          * null-termination).
3085          */
3086         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3087         kaddr[len+rcvbuf->page_base] = '\0';
3088         kunmap_atomic(kaddr, KM_USER0);
3089         return 0;
3090 }
3091
3092 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3093 {
3094         int status;
3095
3096         status = decode_op_hdr(xdr, OP_REMOVE);
3097         if (status)
3098                 goto out;
3099         status = decode_change_info(xdr, cinfo);
3100 out:
3101         return status;
3102 }
3103
3104 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3105               struct nfs4_change_info *new_cinfo)
3106 {
3107         int status;
3108
3109         status = decode_op_hdr(xdr, OP_RENAME);
3110         if (status)
3111                 goto out;
3112         if ((status = decode_change_info(xdr, old_cinfo)))
3113                 goto out;
3114         status = decode_change_info(xdr, new_cinfo);
3115 out:
3116         return status;
3117 }
3118
3119 static int decode_renew(struct xdr_stream *xdr)
3120 {
3121         return decode_op_hdr(xdr, OP_RENEW);
3122 }
3123
3124 static int
3125 decode_savefh(struct xdr_stream *xdr)
3126 {
3127         return decode_op_hdr(xdr, OP_SAVEFH);
3128 }
3129
3130 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3131 {
3132         uint32_t *p;
3133         uint32_t bmlen;
3134         int status;
3135
3136         
3137         status = decode_op_hdr(xdr, OP_SETATTR);
3138         if (status)
3139                 return status;
3140         READ_BUF(4);
3141         READ32(bmlen);
3142         READ_BUF(bmlen << 2);
3143         return 0;
3144 }
3145
3146 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3147 {
3148         uint32_t *p;
3149         uint32_t opnum;
3150         int32_t nfserr;
3151
3152         READ_BUF(8);
3153         READ32(opnum);
3154         if (opnum != OP_SETCLIENTID) {
3155                 printk(KERN_NOTICE
3156                                 "nfs4_decode_setclientid: Server returned operation"
3157                                 " %d\n", opnum);
3158                 return -EIO;
3159         }
3160         READ32(nfserr);
3161         if (nfserr == NFS_OK) {
3162                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3163                 READ64(clp->cl_clientid);
3164                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3165         } else if (nfserr == NFSERR_CLID_INUSE) {
3166                 uint32_t len;
3167
3168                 /* skip netid string */
3169                 READ_BUF(4);
3170                 READ32(len);
3171                 READ_BUF(len);
3172
3173                 /* skip uaddr string */
3174                 READ_BUF(4);
3175                 READ32(len);
3176                 READ_BUF(len);
3177                 return -NFSERR_CLID_INUSE;
3178         } else
3179                 return -nfs_stat_to_errno(nfserr);
3180
3181         return 0;
3182 }
3183
3184 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3185 {
3186         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3187 }
3188
3189 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3190 {
3191         uint32_t *p;
3192         int status;
3193
3194         status = decode_op_hdr(xdr, OP_WRITE);
3195         if (status)
3196                 return status;
3197
3198         READ_BUF(16);
3199         READ32(res->count);
3200         READ32(res->verf->committed);
3201         COPYMEM(res->verf->verifier, 8);
3202         return 0;
3203 }
3204
3205 static int decode_delegreturn(struct xdr_stream *xdr)
3206 {
3207         return decode_op_hdr(xdr, OP_DELEGRETURN);
3208 }
3209
3210 /*
3211  * Decode OPEN_DOWNGRADE response
3212  */
3213 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3214 {
3215         struct xdr_stream xdr;
3216         struct compound_hdr hdr;
3217         int status;
3218
3219         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3220         status = decode_compound_hdr(&xdr, &hdr);
3221         if (status)
3222                 goto out;
3223         status = decode_putfh(&xdr);
3224         if (status)
3225                 goto out;
3226         status = decode_open_downgrade(&xdr, res);
3227 out:
3228         return status;
3229 }
3230
3231 /*
3232  * END OF "GENERIC" DECODE ROUTINES.
3233  */
3234
3235 /*
3236  * Decode ACCESS response
3237  */
3238 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3239 {
3240         struct xdr_stream xdr;
3241         struct compound_hdr hdr;
3242         int status;
3243         
3244         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3245         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3246                 goto out;
3247         if ((status = decode_putfh(&xdr)) == 0)
3248                 status = decode_access(&xdr, res);
3249 out:
3250         return status;
3251 }
3252
3253 /*
3254  * Decode LOOKUP response
3255  */
3256 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3257 {
3258         struct xdr_stream xdr;
3259         struct compound_hdr hdr;
3260         int status;
3261         
3262         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3263         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3264                 goto out;
3265         if ((status = decode_putfh(&xdr)) != 0)
3266                 goto out;
3267         if ((status = decode_lookup(&xdr)) != 0)
3268                 goto out;
3269         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3270                 goto out;
3271         status = decode_getfattr(&xdr, res->fattr, res->server);
3272 out:
3273         return status;
3274 }
3275
3276 /*
3277  * Decode LOOKUP_ROOT response
3278  */
3279 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3280 {
3281         struct xdr_stream xdr;
3282         struct compound_hdr hdr;
3283         int status;
3284         
3285         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3286         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3287                 goto out;
3288         if ((status = decode_putrootfh(&xdr)) != 0)
3289                 goto out;
3290         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3291                 status = decode_getfattr(&xdr, res->fattr, res->server);
3292 out:
3293         return status;
3294 }
3295
3296 /*
3297  * Decode REMOVE response
3298  */
3299 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3300 {
3301         struct xdr_stream xdr;
3302         struct compound_hdr hdr;
3303         int status;
3304         
3305         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3306         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3307                 goto out;
3308         if ((status = decode_putfh(&xdr)) == 0)
3309                 status = decode_remove(&xdr, cinfo);
3310 out:
3311         return status;
3312 }
3313
3314 /*
3315  * Decode RENAME response
3316  */
3317 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3318 {
3319         struct xdr_stream xdr;
3320         struct compound_hdr hdr;
3321         int status;
3322         
3323         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3324         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3325                 goto out;
3326         if ((status = decode_putfh(&xdr)) != 0)
3327                 goto out;
3328         if ((status = decode_savefh(&xdr)) != 0)
3329                 goto out;
3330         if ((status = decode_putfh(&xdr)) != 0)
3331                 goto out;
3332         status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
3333 out:
3334         return status;
3335 }
3336
3337 /*
3338  * Decode LINK response
3339  */
3340 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3341 {
3342         struct xdr_stream xdr;
3343         struct compound_hdr hdr;
3344         int status;
3345         
3346         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3347         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3348                 goto out;
3349         if ((status = decode_putfh(&xdr)) != 0)
3350                 goto out;
3351         if ((status = decode_savefh(&xdr)) != 0)
3352                 goto out;
3353         if ((status = decode_putfh(&xdr)) != 0)
3354                 goto out;
3355         status = decode_link(&xdr, cinfo);
3356 out:
3357         return status;
3358 }
3359
3360 /*
3361  * Decode CREATE response
3362  */
3363 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3364 {
3365         struct xdr_stream xdr;
3366         struct compound_hdr hdr;
3367         int status;
3368         
3369         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3370         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3371                 goto out;
3372         if ((status = decode_putfh(&xdr)) != 0)
3373                 goto out;
3374         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3375                 goto out;
3376         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3377                 goto out;
3378         status = decode_getfattr(&xdr, res->fattr, res->server);
3379         if (status == NFS4ERR_DELAY)
3380                 status = 0;
3381 out:
3382         return status;
3383 }
3384
3385 /*
3386  * Decode SYMLINK response
3387  */
3388 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3389 {
3390         return nfs4_xdr_dec_create(rqstp, p, res);
3391 }
3392
3393 /*
3394  * Decode GETATTR response
3395  */
3396 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3397 {
3398         struct xdr_stream xdr;
3399         struct compound_hdr hdr;
3400         int status;
3401         
3402         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3403         status = decode_compound_hdr(&xdr, &hdr);
3404         if (status)
3405                 goto out;
3406         status = decode_putfh(&xdr);
3407         if (status)
3408                 goto out;
3409         status = decode_getfattr(&xdr, res->fattr, res->server);
3410 out:
3411         return status;
3412
3413 }
3414
3415
3416 /*
3417  * Decode CLOSE response
3418  */
3419 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3420 {
3421         struct xdr_stream xdr;
3422         struct compound_hdr hdr;
3423         int status;
3424
3425         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3426         status = decode_compound_hdr(&xdr, &hdr);
3427         if (status)
3428                 goto out;
3429         status = decode_putfh(&xdr);
3430         if (status)
3431                 goto out;
3432         status = decode_close(&xdr, res);
3433 out:
3434         return status;
3435 }
3436
3437 /*
3438  * Decode OPEN response
3439  */
3440 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3441 {
3442         struct xdr_stream xdr;
3443         struct compound_hdr hdr;
3444         int status;
3445
3446         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3447         status = decode_compound_hdr(&xdr, &hdr);
3448         if (status)
3449                 goto out;
3450         status = decode_putfh(&xdr);
3451         if (status)
3452                 goto out;
3453         status = decode_open(&xdr, res);
3454         if (status)
3455                 goto out;
3456         status = decode_getfh(&xdr, &res->fh);
3457         if (status)
3458                 goto out;
3459         status = decode_getfattr(&xdr, res->f_attr, res->server);
3460         if (status == NFS4ERR_DELAY)
3461                 status = 0;
3462 out:
3463         return status;
3464 }
3465
3466 /*
3467  * Decode OPEN_CONFIRM response
3468  */
3469 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3470 {
3471         struct xdr_stream xdr;
3472         struct compound_hdr hdr;
3473         int status;
3474
3475         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3476         status = decode_compound_hdr(&xdr, &hdr);
3477         if (status)
3478                 goto out;
3479         status = decode_putfh(&xdr);
3480         if (status)
3481                 goto out;
3482         status = decode_open_confirm(&xdr, res);
3483 out:
3484         return status;
3485 }
3486
3487 /*
3488  * Decode OPEN response
3489  */
3490 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3491 {
3492         struct xdr_stream xdr;
3493         struct compound_hdr hdr;
3494         int status;
3495
3496         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3497         status = decode_compound_hdr(&xdr, &hdr);
3498         if (status)
3499                 goto out;
3500         status = decode_putfh(&xdr);
3501         if (status)
3502                 goto out;
3503         status = decode_open(&xdr, res);
3504 out:
3505         return status;
3506 }
3507
3508 /*
3509  * Decode SETATTR response
3510  */
3511 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3512 {
3513         struct xdr_stream xdr;
3514         struct compound_hdr hdr;
3515         int status;
3516
3517         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3518         status = decode_compound_hdr(&xdr, &hdr);
3519         if (status)
3520                 goto out;
3521         status = decode_putfh(&xdr);
3522         if (status)
3523                 goto out;
3524         status = decode_setattr(&xdr, res);
3525         if (status)
3526                 goto out;
3527         status = decode_getfattr(&xdr, res->fattr, res->server);
3528         if (status == NFS4ERR_DELAY)
3529                 status = 0;
3530 out:
3531         return status;
3532 }
3533
3534 /*
3535  * Decode LOCK response
3536  */
3537 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3538 {
3539         struct xdr_stream xdr;
3540         struct compound_hdr hdr;
3541         int status;
3542
3543         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3544         status = decode_compound_hdr(&xdr, &hdr);
3545         if (status)
3546                 goto out;
3547         status = decode_putfh(&xdr);
3548         if (status)
3549                 goto out;
3550         status = decode_lock(&xdr, res);
3551 out:
3552         return status;
3553 }
3554
3555 /*
3556  * Decode LOCKT response
3557  */
3558 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3559 {
3560         struct xdr_stream xdr;
3561         struct compound_hdr hdr;
3562         int status;
3563
3564         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3565         status = decode_compound_hdr(&xdr, &hdr);
3566         if (status)
3567                 goto out;
3568         status = decode_putfh(&xdr);
3569         if (status)
3570                 goto out;
3571         status = decode_lockt(&xdr, res);
3572 out:
3573         return status;
3574 }
3575
3576 /*
3577  * Decode LOCKU response
3578  */
3579 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3580 {
3581         struct xdr_stream xdr;
3582         struct compound_hdr hdr;
3583         int status;
3584
3585         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3586         status = decode_compound_hdr(&xdr, &hdr);
3587         if (status)
3588                 goto out;
3589         status = decode_putfh(&xdr);
3590         if (status)
3591                 goto out;
3592         status = decode_locku(&xdr, res);
3593 out:
3594         return status;
3595 }
3596
3597 /*
3598  * Decode READLINK response
3599  */
3600 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3601 {
3602         struct xdr_stream xdr;
3603         struct compound_hdr hdr;
3604         int status;
3605
3606         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3607         status = decode_compound_hdr(&xdr, &hdr);
3608         if (status)
3609                 goto out;
3610         status = decode_putfh(&xdr);
3611         if (status)
3612                 goto out;
3613         status = decode_readlink(&xdr, rqstp);
3614 out:
3615         return status;
3616 }
3617
3618 /*
3619  * Decode READDIR response
3620  */
3621 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3622 {
3623         struct xdr_stream xdr;
3624         struct compound_hdr hdr;
3625         int status;
3626
3627         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3628         status = decode_compound_hdr(&xdr, &hdr);
3629         if (status)
3630                 goto out;
3631         status = decode_putfh(&xdr);
3632         if (status)
3633                 goto out;
3634         status = decode_readdir(&xdr, rqstp, res);
3635 out:
3636         return status;
3637 }
3638
3639 /*
3640  * Decode Read response
3641  */
3642 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3643 {
3644         struct xdr_stream xdr;
3645         struct compound_hdr hdr;
3646         int status;
3647
3648         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3649         status = decode_compound_hdr(&xdr, &hdr);
3650         if (status)
3651                 goto out;
3652         status = decode_putfh(&xdr);
3653         if (status)
3654                 goto out;
3655         status = decode_read(&xdr, rqstp, res);
3656         if (!status)
3657                 status = res->count;
3658 out:
3659         return status;
3660 }
3661
3662 /*
3663  * Decode WRITE response
3664  */
3665 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3666 {
3667         struct xdr_stream xdr;
3668         struct compound_hdr hdr;
3669         int status;
3670
3671         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3672         status = decode_compound_hdr(&xdr, &hdr);
3673         if (status)
3674                 goto out;
3675         status = decode_putfh(&xdr);
3676         if (status)
3677                 goto out;
3678         status = decode_write(&xdr, res);
3679         if (!status)
3680                 status = res->count;
3681 out:
3682         return status;
3683 }
3684
3685 /*
3686  * Decode COMMIT response
3687  */
3688 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3689 {
3690         struct xdr_stream xdr;
3691         struct compound_hdr hdr;
3692         int status;
3693
3694         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3695         status = decode_compound_hdr(&xdr, &hdr);
3696         if (status)
3697                 goto out;
3698         status = decode_putfh(&xdr);
3699         if (status)
3700                 goto out;
3701         status = decode_commit(&xdr, res);
3702 out:
3703         return status;
3704 }
3705
3706 /*
3707  * FSINFO request
3708  */
3709 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3710 {
3711         struct xdr_stream xdr;
3712         struct compound_hdr hdr;
3713         int status;
3714
3715         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3716         status = decode_compound_hdr(&xdr, &hdr);
3717         if (!status)
3718                 status = decode_putfh(&xdr);
3719         if (!status)
3720                 status = decode_fsinfo(&xdr, fsinfo);
3721         if (!status)
3722                 status = -nfs_stat_to_errno(hdr.status);
3723         return status;
3724 }
3725
3726 /*
3727  * PATHCONF request
3728  */
3729 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
3730 {
3731         struct xdr_stream xdr;
3732         struct compound_hdr hdr;
3733         int status;
3734
3735         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3736         status = decode_compound_hdr(&xdr, &hdr);
3737         if (!status)
3738                 status = decode_putfh(&xdr);
3739         if (!status)
3740                 status = decode_pathconf(&xdr, pathconf);
3741         return status;
3742 }
3743
3744 /*
3745  * STATFS request
3746  */
3747 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
3748 {
3749         struct xdr_stream xdr;
3750         struct compound_hdr hdr;
3751         int status;
3752
3753         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3754         status = decode_compound_hdr(&xdr, &hdr);
3755         if (!status)
3756                 status = decode_putfh(&xdr);
3757         if (!status)
3758                 status = decode_statfs(&xdr, fsstat);
3759         return status;
3760 }
3761
3762 /*
3763  * GETATTR_BITMAP request
3764  */
3765 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
3766 {
3767         struct xdr_stream xdr;
3768         struct compound_hdr hdr;
3769         int status;
3770
3771         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3772         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3773                 goto out;
3774         if ((status = decode_putfh(&xdr)) != 0)
3775                 goto out;
3776         status = decode_server_caps(&xdr, res);
3777 out:
3778         return status;
3779 }
3780
3781 /*
3782  * Decode RENEW response
3783  */
3784 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3785 {
3786         struct xdr_stream xdr;
3787         struct compound_hdr hdr;
3788         int status;
3789
3790         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3791         status = decode_compound_hdr(&xdr, &hdr);
3792         if (!status)
3793                 status = decode_renew(&xdr);
3794         return status;
3795 }
3796
3797 /*
3798  * a SETCLIENTID request
3799  */
3800 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
3801                 struct nfs4_client *clp)
3802 {
3803         struct xdr_stream xdr;
3804         struct compound_hdr hdr;
3805         int status;
3806
3807         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3808         status = decode_compound_hdr(&xdr, &hdr);
3809         if (!status)
3810                 status = decode_setclientid(&xdr, clp);
3811         if (!status)
3812                 status = -nfs_stat_to_errno(hdr.status);
3813         return status;
3814 }
3815
3816 /*
3817  * a SETCLIENTID_CONFIRM request
3818  */
3819 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3820 {
3821         struct xdr_stream xdr;
3822         struct compound_hdr hdr;
3823         int status;
3824
3825         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3826         status = decode_compound_hdr(&xdr, &hdr);
3827         if (!status)
3828                 status = decode_setclientid_confirm(&xdr);
3829         if (!status)
3830                 status = decode_putrootfh(&xdr);
3831         if (!status)
3832                 status = decode_fsinfo(&xdr, fsinfo);
3833         if (!status)
3834                 status = -nfs_stat_to_errno(hdr.status);
3835         return status;
3836 }
3837
3838 /*
3839  * DELEGRETURN request
3840  */
3841 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3842 {
3843         struct xdr_stream xdr;
3844         struct compound_hdr hdr;
3845         int status;
3846
3847         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3848         status = decode_compound_hdr(&xdr, &hdr);
3849         if (status == 0) {
3850                 status = decode_putfh(&xdr);
3851                 if (status == 0)
3852                         status = decode_delegreturn(&xdr);
3853         }
3854         return status;
3855 }
3856
3857 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
3858 {
3859         uint32_t bitmap[2] = {0};
3860         uint32_t len;
3861
3862         if (!*p++) {
3863                 if (!*p)
3864                         return ERR_PTR(-EAGAIN);
3865                 entry->eof = 1;
3866                 return ERR_PTR(-EBADCOOKIE);
3867         }
3868
3869         entry->prev_cookie = entry->cookie;
3870         p = xdr_decode_hyper(p, &entry->cookie);
3871         entry->len = ntohl(*p++);
3872         entry->name = (const char *) p;
3873         p += XDR_QUADLEN(entry->len);
3874
3875         /*
3876          * In case the server doesn't return an inode number,
3877          * we fake one here.  (We don't use inode number 0,
3878          * since glibc seems to choke on it...)
3879          */
3880         entry->ino = 1;
3881
3882         len = ntohl(*p++);              /* bitmap length */
3883         if (len-- > 0) {
3884                 bitmap[0] = ntohl(*p++);
3885                 if (len-- > 0) {
3886                         bitmap[1] = ntohl(*p++);
3887                         p += len;
3888                 }
3889         }
3890         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
3891         if (len > 0) {
3892                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
3893                         xdr_decode_hyper(p, &entry->ino);
3894                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
3895                         xdr_decode_hyper(p, &entry->ino);
3896                 p += len;
3897         }
3898
3899         entry->eof = !p[0] && p[1];
3900         return p;
3901 }
3902
3903 /*
3904  * We need to translate between nfs status return values and
3905  * the local errno values which may not be the same.
3906  */
3907 static struct {
3908         int stat;
3909         int errno;
3910 } nfs_errtbl[] = {
3911         { NFS4_OK,              0               },
3912         { NFS4ERR_PERM,         EPERM           },
3913         { NFS4ERR_NOENT,        ENOENT          },
3914         { NFS4ERR_IO,           errno_NFSERR_IO },
3915         { NFS4ERR_NXIO,         ENXIO           },
3916         { NFS4ERR_ACCESS,       EACCES          },
3917         { NFS4ERR_EXIST,        EEXIST          },
3918         { NFS4ERR_XDEV,         EXDEV           },
3919         { NFS4ERR_NOTDIR,       ENOTDIR         },
3920         { NFS4ERR_ISDIR,        EISDIR          },
3921         { NFS4ERR_INVAL,        EINVAL          },
3922         { NFS4ERR_FBIG,         EFBIG           },
3923         { NFS4ERR_NOSPC,        ENOSPC          },
3924         { NFS4ERR_ROFS,         EROFS           },
3925         { NFS4ERR_MLINK,        EMLINK          },
3926         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
3927         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
3928         { NFS4ERR_DQUOT,        EDQUOT          },
3929         { NFS4ERR_STALE,        ESTALE          },
3930         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
3931         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
3932         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
3933         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
3934         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
3935         { NFS4ERR_BADTYPE,      EBADTYPE        },
3936         { NFS4ERR_LOCKED,       EAGAIN          },
3937         { NFS4ERR_RESOURCE,     EREMOTEIO       },
3938         { NFS4ERR_SYMLINK,      ELOOP           },
3939         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
3940         { NFS4ERR_DEADLOCK,     EDEADLK         },
3941         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
3942                                                     * to be handled by a
3943                                                     * middle-layer.
3944                                                     */
3945         { -1,                   EIO             }
3946 };
3947
3948 /*
3949  * Convert an NFS error code to a local one.
3950  * This one is used jointly by NFSv2 and NFSv3.
3951  */
3952 static int
3953 nfs_stat_to_errno(int stat)
3954 {
3955         int i;
3956         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
3957                 if (nfs_errtbl[i].stat == stat)
3958                         return nfs_errtbl[i].errno;
3959         }
3960         if (stat <= 10000 || stat > 10100) {
3961                 /* The server is looney tunes. */
3962                 return ESERVERFAULT;
3963         }
3964         /* If we cannot translate the error, the recovery routines should
3965          * handle it.
3966          * Note: remaining NFSv4 error codes have values > 10000, so should
3967          * not conflict with native Linux error codes.
3968          */
3969         return stat;
3970 }
3971
3972 #ifndef MAX
3973 # define MAX(a, b)      (((a) > (b))? (a) : (b))
3974 #endif
3975
3976 #define PROC(proc, argtype, restype)                            \
3977 [NFSPROC4_CLNT_##proc] = {                                      \
3978         .p_proc   = NFSPROC4_COMPOUND,                          \
3979         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
3980         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
3981         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
3982     }
3983
3984 struct rpc_procinfo     nfs4_procedures[] = {
3985   PROC(READ,            enc_read,       dec_read),
3986   PROC(WRITE,           enc_write,      dec_write),
3987   PROC(COMMIT,          enc_commit,     dec_commit),
3988   PROC(OPEN,            enc_open,       dec_open),
3989   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
3990   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
3991   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),