[PATCH] fs: Use ARRAY_SIZE macro
[linux-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 nfs4_fattr_bitmap_maxsz 3
87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
90 /* This is based on getfattr, which uses the most attributes: */
91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
94                                 nfs4_fattr_value_maxsz)
95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
104 #define encode_setclientid_maxsz \
105                                 (op_encode_hdr_maxsz + \
106                                 4 /*server->ip_addr*/ + \
107                                 1 /*Netid*/ + \
108                                 6 /*uaddr*/ + \
109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
110 #define decode_setclientid_maxsz \
111                                 (op_decode_hdr_maxsz + \
112                                 2 + \
113                                 1024) /* large value for CLID_INUSE */
114 #define encode_setclientid_confirm_maxsz \
115                                 (op_encode_hdr_maxsz + \
116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
117 #define decode_setclientid_confirm_maxsz \
118                                 (op_decode_hdr_maxsz)
119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
122                                 nfs4_name_maxsz)
123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
124                                 2 * nfs4_name_maxsz)
125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
127                                 nfs4_name_maxsz)
128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
130                                 1 + nfs4_name_maxsz + \
131                                 nfs4_path_maxsz + \
132                                 nfs4_fattr_maxsz)
133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
135                                 2 + nfs4_name_maxsz + \
136                                 nfs4_fattr_maxsz)
137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
143                                 encode_putfh_maxsz + \
144                                 op_encode_hdr_maxsz + 7)
145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
146                                 decode_putfh_maxsz + \
147                                 op_decode_hdr_maxsz + 2)
148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
149                                 encode_putfh_maxsz + \
150                                 op_encode_hdr_maxsz)
151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
152                                 decode_putfh_maxsz + \
153                                 op_decode_hdr_maxsz)
154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
155                                 encode_putfh_maxsz + \
156                                 op_encode_hdr_maxsz + 9)
157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
158                                 decode_putfh_maxsz + \
159                                 op_decode_hdr_maxsz + 2)
160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
161                                 encode_putfh_maxsz + \
162                                 op_encode_hdr_maxsz + 8 + \
163                                 encode_getattr_maxsz)
164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
165                                 decode_putfh_maxsz + \
166                                 op_decode_hdr_maxsz + 4 + \
167                                 decode_getattr_maxsz)
168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
169                                 encode_putfh_maxsz + \
170                                 op_encode_hdr_maxsz + 3 + \
171                                 encode_getattr_maxsz)
172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
173                                 decode_putfh_maxsz + \
174                                 op_decode_hdr_maxsz + 2 + \
175                                 decode_getattr_maxsz)
176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
177                                 encode_putfh_maxsz + \
178                                 op_encode_hdr_maxsz + \
179                                 13 + 3 + 2 + 64 + \
180                                 encode_getattr_maxsz + \
181                                 encode_getfh_maxsz)
182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
183                                 decode_putfh_maxsz + \
184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
185                                 decode_getattr_maxsz + \
186                                 decode_getfh_maxsz)
187 #define NFS4_enc_open_confirm_sz      \
188                                 (compound_encode_hdr_maxsz + \
189                                 encode_putfh_maxsz + \
190                                 op_encode_hdr_maxsz + 5)
191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
192                                         decode_putfh_maxsz + \
193                                         op_decode_hdr_maxsz + 4)
194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
195                                         encode_putfh_maxsz + \
196                                         op_encode_hdr_maxsz + \
197                                         11)
198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
199                                         decode_putfh_maxsz + \
200                                         op_decode_hdr_maxsz + \
201                                         4 + 5 + 2 + 3)
202 #define NFS4_enc_open_downgrade_sz \
203                                 (compound_encode_hdr_maxsz + \
204                                 encode_putfh_maxsz + \
205                                 op_encode_hdr_maxsz + 7 + \
206                                 encode_getattr_maxsz)
207 #define NFS4_dec_open_downgrade_sz \
208                                 (compound_decode_hdr_maxsz + \
209                                 decode_putfh_maxsz + \
210                                 op_decode_hdr_maxsz + 4 + \
211                                 decode_getattr_maxsz)
212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
213                                 encode_putfh_maxsz + \
214                                 op_encode_hdr_maxsz + 5 + \
215                                 encode_getattr_maxsz)
216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
217                                 decode_putfh_maxsz + \
218                                 op_decode_hdr_maxsz + 4 + \
219                                 decode_getattr_maxsz)
220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
221                                 encode_putfh_maxsz + \
222                                 op_encode_hdr_maxsz + 4 + \
223                                 nfs4_fattr_maxsz + \
224                                 encode_getattr_maxsz)
225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
226                                 decode_putfh_maxsz + \
227                                 op_decode_hdr_maxsz + 3)
228 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
229                                 encode_putfh_maxsz + \
230                                 encode_fsinfo_maxsz)
231 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
232                                 decode_putfh_maxsz + \
233                                 decode_fsinfo_maxsz)
234 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
235                                 encode_renew_maxsz)
236 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
237                                 decode_renew_maxsz)
238 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
239                                 encode_setclientid_maxsz)
240 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
241                                 decode_setclientid_maxsz)
242 #define NFS4_enc_setclientid_confirm_sz \
243                                 (compound_encode_hdr_maxsz + \
244                                 encode_setclientid_confirm_maxsz + \
245                                 encode_putrootfh_maxsz + \
246                                 encode_fsinfo_maxsz)
247 #define NFS4_dec_setclientid_confirm_sz \
248                                 (compound_decode_hdr_maxsz + \
249                                 decode_setclientid_confirm_maxsz + \
250                                 decode_putrootfh_maxsz + \
251                                 decode_fsinfo_maxsz)
252 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
253                                 encode_putfh_maxsz + \
254                                 encode_getattr_maxsz + \
255                                 op_encode_hdr_maxsz + \
256                                 1 + 1 + 2 + 2 + \
257                                 1 + 4 + 1 + 2 + \
258                                 owner_id_maxsz)
259 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
260                                 decode_putfh_maxsz + \
261                                 decode_getattr_maxsz + \
262                                 op_decode_hdr_maxsz + \
263                                 2 + 2 + 1 + 2 + \
264                                 owner_id_maxsz)
265 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
266                                 encode_putfh_maxsz + \
267                                 encode_getattr_maxsz + \
268                                 op_encode_hdr_maxsz + \
269                                 1 + 2 + 2 + 2 + \
270                                 owner_id_maxsz)
271 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
272 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
273                                 encode_putfh_maxsz + \
274                                 encode_getattr_maxsz + \
275                                 op_encode_hdr_maxsz + \
276                                 1 + 1 + 4 + 2 + 2)
277 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
278                                 decode_putfh_maxsz + \
279                                 decode_getattr_maxsz + \
280                                 op_decode_hdr_maxsz + 4)
281 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
282                                 encode_putfh_maxsz + \
283                                 op_encode_hdr_maxsz + 1)
284 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
285                                 decode_putfh_maxsz + \
286                                 op_decode_hdr_maxsz + 2)
287 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
288                                 encode_putfh_maxsz + \
289                                 encode_getattr_maxsz)
290 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
291                                 decode_putfh_maxsz + \
292                                 decode_getattr_maxsz)
293 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
294                                 encode_putfh_maxsz + \
295                                 encode_lookup_maxsz + \
296                                 encode_getattr_maxsz + \
297                                 encode_getfh_maxsz)
298 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
299                                 decode_putfh_maxsz + \
300                                 op_decode_hdr_maxsz + \
301                                 decode_getattr_maxsz + \
302                                 decode_getfh_maxsz)
303 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
304                                 encode_putrootfh_maxsz + \
305                                 encode_getattr_maxsz + \
306                                 encode_getfh_maxsz)
307 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
308                                 decode_putrootfh_maxsz + \
309                                 decode_getattr_maxsz + \
310                                 decode_getfh_maxsz)
311 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
312                                 encode_putfh_maxsz + \
313                                 encode_remove_maxsz + \
314                                 encode_getattr_maxsz)
315 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
316                                 decode_putfh_maxsz + \
317                                 op_decode_hdr_maxsz + 5 + \
318                                 decode_getattr_maxsz)
319 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
320                                 encode_putfh_maxsz + \
321                                 encode_savefh_maxsz + \
322                                 encode_putfh_maxsz + \
323                                 encode_rename_maxsz + \
324                                 encode_getattr_maxsz + \
325                                 encode_restorefh_maxsz + \
326                                 encode_getattr_maxsz)
327 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
328                                 decode_putfh_maxsz + \
329                                 decode_savefh_maxsz + \
330                                 decode_putfh_maxsz + \
331                                 decode_rename_maxsz + \
332                                 decode_getattr_maxsz + \
333                                 decode_restorefh_maxsz + \
334                                 decode_getattr_maxsz)
335 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
336                                 encode_putfh_maxsz + \
337                                 encode_savefh_maxsz + \
338                                 encode_putfh_maxsz + \
339                                 encode_link_maxsz + \
340                                 decode_getattr_maxsz + \
341                                 encode_restorefh_maxsz + \
342                                 decode_getattr_maxsz)
343 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
344                                 decode_putfh_maxsz + \
345                                 decode_savefh_maxsz + \
346                                 decode_putfh_maxsz + \
347                                 decode_link_maxsz + \
348                                 decode_getattr_maxsz + \
349                                 decode_restorefh_maxsz + \
350                                 decode_getattr_maxsz)
351 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
352                                 encode_putfh_maxsz + \
353                                 encode_symlink_maxsz + \
354                                 encode_getattr_maxsz + \
355                                 encode_getfh_maxsz)
356 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
357                                 decode_putfh_maxsz + \
358                                 decode_symlink_maxsz + \
359                                 decode_getattr_maxsz + \
360                                 decode_getfh_maxsz)
361 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
362                                 encode_putfh_maxsz + \
363                                 encode_savefh_maxsz + \
364                                 encode_create_maxsz + \
365                                 encode_getfh_maxsz + \
366                                 encode_getattr_maxsz + \
367                                 encode_restorefh_maxsz + \
368                                 encode_getattr_maxsz)
369 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
370                                 decode_putfh_maxsz + \
371                                 decode_savefh_maxsz + \
372                                 decode_create_maxsz + \
373                                 decode_getfh_maxsz + \
374                                 decode_getattr_maxsz + \
375                                 decode_restorefh_maxsz + \
376                                 decode_getattr_maxsz)
377 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
378                                 encode_putfh_maxsz + \
379                                 encode_getattr_maxsz)
380 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
381                                 decode_putfh_maxsz + \
382                                 decode_getattr_maxsz)
383 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
384                                 encode_putfh_maxsz + \
385                                 encode_getattr_maxsz)
386 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
387                                 decode_putfh_maxsz + \
388                                 op_decode_hdr_maxsz + 12)
389 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
390                                 encode_getattr_maxsz)
391 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
392                                 decode_getattr_maxsz)
393 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
394                                 encode_putfh_maxsz + \
395                                 encode_delegreturn_maxsz + \
396                                 encode_getattr_maxsz)
397 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
398                                 decode_delegreturn_maxsz + \
399                                 decode_getattr_maxsz)
400 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
401                                 encode_putfh_maxsz + \
402                                 encode_getattr_maxsz)
403 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
404                                 decode_putfh_maxsz + \
405                                 op_decode_hdr_maxsz + \
406                                 nfs4_fattr_bitmap_maxsz + 1)
407 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
408                                 encode_putfh_maxsz + \
409                                 op_encode_hdr_maxsz + 4 + \
410                                 nfs4_fattr_bitmap_maxsz + 1)
411 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
412                                 decode_putfh_maxsz + \
413                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
414
415 static struct {
416         unsigned int    mode;
417         unsigned int    nfs2type;
418 } nfs_type2fmt[] = {
419         { 0,            NFNON        },
420         { S_IFREG,      NFREG        },
421         { S_IFDIR,      NFDIR        },
422         { S_IFBLK,      NFBLK        },
423         { S_IFCHR,      NFCHR        },
424         { S_IFLNK,      NFLNK        },
425         { S_IFSOCK,     NFSOCK       },
426         { S_IFIFO,      NFFIFO       },
427         { 0,            NFNON        },
428         { 0,            NFNON        },
429 };
430
431 struct compound_hdr {
432         int32_t         status;
433         uint32_t        nops;
434         uint32_t        taglen;
435         char *          tag;
436 };
437
438 /*
439  * START OF "GENERIC" ENCODE ROUTINES.
440  *   These may look a little ugly since they are imported from a "generic"
441  * set of XDR encode/decode routines which are intended to be shared by
442  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
443  *
444  * If the pain of reading these is too great, it should be a straightforward
445  * task to translate them into Linux-specific versions which are more
446  * consistent with the style used in NFSv2/v3...
447  */
448 #define WRITE32(n)               *p++ = htonl(n)
449 #define WRITE64(n)               do {                           \
450         *p++ = htonl((uint32_t)((n) >> 32));                            \
451         *p++ = htonl((uint32_t)(n));                                    \
452 } while (0)
453 #define WRITEMEM(ptr,nbytes)     do {                           \
454         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
455 } while (0)
456
457 #define RESERVE_SPACE(nbytes)   do {                            \
458         p = xdr_reserve_space(xdr, nbytes);                     \
459         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
460         BUG_ON(!p);                                             \
461 } while (0)
462
463 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
464 {
465         uint32_t *p;
466
467         p = xdr_reserve_space(xdr, 4 + len);
468         BUG_ON(p == NULL);
469         xdr_encode_opaque(p, str, len);
470 }
471
472 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
473 {
474         uint32_t *p;
475
476         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
477         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
478         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
479         WRITE32(hdr->taglen);
480         WRITEMEM(hdr->tag, hdr->taglen);
481         WRITE32(NFS4_MINOR_VERSION);
482         WRITE32(hdr->nops);
483         return 0;
484 }
485
486 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
487 {
488         uint32_t *p;
489
490         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
491         BUG_ON(p == NULL);
492         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
493 }
494
495 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
496 {
497         char owner_name[IDMAP_NAMESZ];
498         char owner_group[IDMAP_NAMESZ];
499         int owner_namelen = 0;
500         int owner_grouplen = 0;
501         uint32_t *p;
502         uint32_t *q;
503         int len;
504         uint32_t bmval0 = 0;
505         uint32_t bmval1 = 0;
506         int status;
507
508         /*
509          * We reserve enough space to write the entire attribute buffer at once.
510          * In the worst-case, this would be
511          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
512          *          = 36 bytes, plus any contribution from variable-length fields
513          *            such as owner/group.
514          */
515         len = 16;
516
517         /* Sigh */
518         if (iap->ia_valid & ATTR_SIZE)
519                 len += 8;
520         if (iap->ia_valid & ATTR_MODE)
521                 len += 4;
522         if (iap->ia_valid & ATTR_UID) {
523                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
524                 if (owner_namelen < 0) {
525                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
526                                iap->ia_uid);
527                         /* XXX */
528                         strcpy(owner_name, "nobody");
529                         owner_namelen = sizeof("nobody") - 1;
530                         /* goto out; */
531                 }
532                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
533         }
534         if (iap->ia_valid & ATTR_GID) {
535                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
536                 if (owner_grouplen < 0) {
537                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
538                                iap->ia_gid);
539                         strcpy(owner_group, "nobody");
540                         owner_grouplen = sizeof("nobody") - 1;
541                         /* goto out; */
542                 }
543                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
544         }
545         if (iap->ia_valid & ATTR_ATIME_SET)
546                 len += 16;
547         else if (iap->ia_valid & ATTR_ATIME)
548                 len += 4;
549         if (iap->ia_valid & ATTR_MTIME_SET)
550                 len += 16;
551         else if (iap->ia_valid & ATTR_MTIME)
552                 len += 4;
553         RESERVE_SPACE(len);
554
555         /*
556          * We write the bitmap length now, but leave the bitmap and the attribute
557          * buffer length to be backfilled at the end of this routine.
558          */
559         WRITE32(2);
560         q = p;
561         p += 3;
562
563         if (iap->ia_valid & ATTR_SIZE) {
564                 bmval0 |= FATTR4_WORD0_SIZE;
565                 WRITE64(iap->ia_size);
566         }
567         if (iap->ia_valid & ATTR_MODE) {
568                 bmval1 |= FATTR4_WORD1_MODE;
569                 WRITE32(iap->ia_mode & S_IALLUGO);
570         }
571         if (iap->ia_valid & ATTR_UID) {
572                 bmval1 |= FATTR4_WORD1_OWNER;
573                 WRITE32(owner_namelen);
574                 WRITEMEM(owner_name, owner_namelen);
575         }
576         if (iap->ia_valid & ATTR_GID) {
577                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
578                 WRITE32(owner_grouplen);
579                 WRITEMEM(owner_group, owner_grouplen);
580         }
581         if (iap->ia_valid & ATTR_ATIME_SET) {
582                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
583                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
584                 WRITE32(0);
585                 WRITE32(iap->ia_mtime.tv_sec);
586                 WRITE32(iap->ia_mtime.tv_nsec);
587         }
588         else if (iap->ia_valid & ATTR_ATIME) {
589                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
590                 WRITE32(NFS4_SET_TO_SERVER_TIME);
591         }
592         if (iap->ia_valid & ATTR_MTIME_SET) {
593                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
594                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
595                 WRITE32(0);
596                 WRITE32(iap->ia_mtime.tv_sec);
597                 WRITE32(iap->ia_mtime.tv_nsec);
598         }
599         else if (iap->ia_valid & ATTR_MTIME) {
600                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
601                 WRITE32(NFS4_SET_TO_SERVER_TIME);
602         }
603         
604         /*
605          * Now we backfill the bitmap and the attribute buffer length.
606          */
607         if (len != ((char *)p - (char *)q) + 4) {
608                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
609                                 len, ((char *)p - (char *)q) + 4);
610                 BUG();
611         }
612         len = (char *)p - (char *)q - 12;
613         *q++ = htonl(bmval0);
614         *q++ = htonl(bmval1);
615         *q++ = htonl(len);
616
617         status = 0;
618 /* out: */
619         return status;
620 }
621
622 static int encode_access(struct xdr_stream *xdr, u32 access)
623 {
624         uint32_t *p;
625
626         RESERVE_SPACE(8);
627         WRITE32(OP_ACCESS);
628         WRITE32(access);
629         
630         return 0;
631 }
632
633 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
634 {
635         uint32_t *p;
636
637         RESERVE_SPACE(8+sizeof(arg->stateid->data));
638         WRITE32(OP_CLOSE);
639         WRITE32(arg->seqid->sequence->counter);
640         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
641         
642         return 0;
643 }
644
645 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
646 {
647         uint32_t *p;
648         
649         RESERVE_SPACE(16);
650         WRITE32(OP_COMMIT);
651         WRITE64(args->offset);
652         WRITE32(args->count);
653
654         return 0;
655 }
656
657 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
658 {
659         uint32_t *p;
660         
661         RESERVE_SPACE(8);
662         WRITE32(OP_CREATE);
663         WRITE32(create->ftype);
664
665         switch (create->ftype) {
666         case NF4LNK:
667                 RESERVE_SPACE(4 + create->u.symlink->len);
668                 WRITE32(create->u.symlink->len);
669                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
670                 break;
671
672         case NF4BLK: case NF4CHR:
673                 RESERVE_SPACE(8);
674                 WRITE32(create->u.device.specdata1);
675                 WRITE32(create->u.device.specdata2);
676                 break;
677
678         default:
679                 break;
680         }
681
682         RESERVE_SPACE(4 + create->name->len);
683         WRITE32(create->name->len);
684         WRITEMEM(create->name->name, create->name->len);
685
686         return encode_attrs(xdr, create->attrs, create->server);
687 }
688
689 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
690 {
691         uint32_t *p;
692
693         RESERVE_SPACE(12);
694         WRITE32(OP_GETATTR);
695         WRITE32(1);
696         WRITE32(bitmap);
697         return 0;
698 }
699
700 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
701 {
702         uint32_t *p;
703
704         RESERVE_SPACE(16);
705         WRITE32(OP_GETATTR);
706         WRITE32(2);
707         WRITE32(bm0);
708         WRITE32(bm1);
709         return 0;
710 }
711
712 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
713 {
714         return encode_getattr_two(xdr,
715                         bitmask[0] & nfs4_fattr_bitmap[0],
716                         bitmask[1] & nfs4_fattr_bitmap[1]);
717 }
718
719 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
720 {
721         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
722                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
723 }
724
725 static int encode_getfh(struct xdr_stream *xdr)
726 {
727         uint32_t *p;
728
729         RESERVE_SPACE(4);
730         WRITE32(OP_GETFH);
731
732         return 0;
733 }
734
735 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
736 {
737         uint32_t *p;
738
739         RESERVE_SPACE(8 + name->len);
740         WRITE32(OP_LINK);
741         WRITE32(name->len);
742         WRITEMEM(name->name, name->len);
743         
744         return 0;
745 }
746
747 static inline int nfs4_lock_type(struct file_lock *fl, int block)
748 {
749         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
750                 return block ? NFS4_READW_LT : NFS4_READ_LT;
751         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
752 }
753
754 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
755 {
756         if (fl->fl_end == OFFSET_MAX)
757                 return ~(uint64_t)0;
758         return fl->fl_end - fl->fl_start + 1;
759 }
760
761 /*
762  * opcode,type,reclaim,offset,length,new_lock_owner = 32
763  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
764  */
765 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
766 {
767         uint32_t *p;
768
769         RESERVE_SPACE(32);
770         WRITE32(OP_LOCK);
771         WRITE32(nfs4_lock_type(args->fl, args->block));
772         WRITE32(args->reclaim);
773         WRITE64(args->fl->fl_start);
774         WRITE64(nfs4_lock_length(args->fl));
775         WRITE32(args->new_lock_owner);
776         if (args->new_lock_owner){
777                 RESERVE_SPACE(40);
778                 WRITE32(args->open_seqid->sequence->counter);
779                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
780                 WRITE32(args->lock_seqid->sequence->counter);
781                 WRITE64(args->lock_owner.clientid);
782                 WRITE32(4);
783                 WRITE32(args->lock_owner.id);
784         }
785         else {
786                 RESERVE_SPACE(20);
787                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
788                 WRITE32(args->lock_seqid->sequence->counter);
789         }
790
791         return 0;
792 }
793
794 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
795 {
796         uint32_t *p;
797
798         RESERVE_SPACE(40);
799         WRITE32(OP_LOCKT);
800         WRITE32(nfs4_lock_type(args->fl, 0));
801         WRITE64(args->fl->fl_start);
802         WRITE64(nfs4_lock_length(args->fl));
803         WRITE64(args->lock_owner.clientid);
804         WRITE32(4);
805         WRITE32(args->lock_owner.id);
806
807         return 0;
808 }
809
810 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
811 {
812         uint32_t *p;
813
814         RESERVE_SPACE(44);
815         WRITE32(OP_LOCKU);
816         WRITE32(nfs4_lock_type(args->fl, 0));
817         WRITE32(args->seqid->sequence->counter);
818         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
819         WRITE64(args->fl->fl_start);
820         WRITE64(nfs4_lock_length(args->fl));
821
822         return 0;
823 }
824
825 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
826 {
827         int len = name->len;
828         uint32_t *p;
829
830         RESERVE_SPACE(8 + len);
831         WRITE32(OP_LOOKUP);
832         WRITE32(len);
833         WRITEMEM(name->name, len);
834
835         return 0;
836 }
837
838 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
839 {
840         uint32_t *p;
841
842         RESERVE_SPACE(8);
843         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
844                 case FMODE_READ:
845                         WRITE32(NFS4_SHARE_ACCESS_READ);
846                         break;
847                 case FMODE_WRITE:
848                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
849                         break;
850                 case FMODE_READ|FMODE_WRITE:
851                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
852                         break;
853                 default:
854                         BUG();
855         }
856         WRITE32(0);             /* for linux, share_deny = 0 always */
857 }
858
859 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
860 {
861         uint32_t *p;
862  /*
863  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
864  * owner 4 = 32
865  */
866         RESERVE_SPACE(8);
867         WRITE32(OP_OPEN);
868         WRITE32(arg->seqid->sequence->counter);
869         encode_share_access(xdr, arg->open_flags);
870         RESERVE_SPACE(16);
871         WRITE64(arg->clientid);
872         WRITE32(4);
873         WRITE32(arg->id);
874 }
875
876 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
877 {
878         uint32_t *p;
879
880         RESERVE_SPACE(4);
881         switch(arg->open_flags & O_EXCL) {
882                 case 0:
883                         WRITE32(NFS4_CREATE_UNCHECKED);
884                         encode_attrs(xdr, arg->u.attrs, arg->server);
885                         break;
886                 default:
887                         WRITE32(NFS4_CREATE_EXCLUSIVE);
888                         encode_nfs4_verifier(xdr, &arg->u.verifier);
889         }
890 }
891
892 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
893 {
894         uint32_t *p;
895
896         RESERVE_SPACE(4);
897         switch (arg->open_flags & O_CREAT) {
898                 case 0:
899                         WRITE32(NFS4_OPEN_NOCREATE);
900                         break;
901                 default:
902                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
903                         WRITE32(NFS4_OPEN_CREATE);
904                         encode_createmode(xdr, arg);
905         }
906 }
907
908 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
909 {
910         uint32_t *p;
911
912         RESERVE_SPACE(4);
913         switch (delegation_type) {
914                 case 0:
915                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
916                         break;
917                 case FMODE_READ:
918                         WRITE32(NFS4_OPEN_DELEGATE_READ);
919                         break;
920                 case FMODE_WRITE|FMODE_READ:
921                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
922                         break;
923                 default:
924                         BUG();
925         }
926 }
927
928 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
929 {
930         uint32_t *p;
931
932         RESERVE_SPACE(4);
933         WRITE32(NFS4_OPEN_CLAIM_NULL);
934         encode_string(xdr, name->len, name->name);
935 }
936
937 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
938 {
939         uint32_t *p;
940
941         RESERVE_SPACE(4);
942         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
943         encode_delegation_type(xdr, type);
944 }
945
946 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
947 {
948         uint32_t *p;
949
950         RESERVE_SPACE(4+sizeof(stateid->data));
951         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
952         WRITEMEM(stateid->data, sizeof(stateid->data));
953         encode_string(xdr, name->len, name->name);
954 }
955
956 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
957 {
958         encode_openhdr(xdr, arg);
959         encode_opentype(xdr, arg);
960         switch (arg->claim) {
961                 case NFS4_OPEN_CLAIM_NULL:
962                         encode_claim_null(xdr, arg->name);
963                         break;
964                 case NFS4_OPEN_CLAIM_PREVIOUS:
965                         encode_claim_previous(xdr, arg->u.delegation_type);
966                         break;
967                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
968                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
969                         break;
970                 default:
971                         BUG();
972         }
973         return 0;
974 }
975
976 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
977 {
978         uint32_t *p;
979
980         RESERVE_SPACE(8+sizeof(arg->stateid->data));
981         WRITE32(OP_OPEN_CONFIRM);
982         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
983         WRITE32(arg->seqid->sequence->counter);
984
985         return 0;
986 }
987
988 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
989 {
990         uint32_t *p;
991
992         RESERVE_SPACE(8+sizeof(arg->stateid->data));
993         WRITE32(OP_OPEN_DOWNGRADE);
994         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
995         WRITE32(arg->seqid->sequence->counter);
996         encode_share_access(xdr, arg->open_flags);
997         return 0;
998 }
999
1000 static int
1001 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1002 {
1003         int len = fh->size;
1004         uint32_t *p;
1005
1006         RESERVE_SPACE(8 + len);
1007         WRITE32(OP_PUTFH);
1008         WRITE32(len);
1009         WRITEMEM(fh->data, len);
1010
1011         return 0;
1012 }
1013
1014 static int encode_putrootfh(struct xdr_stream *xdr)
1015 {
1016         uint32_t *p;
1017         
1018         RESERVE_SPACE(4);
1019         WRITE32(OP_PUTROOTFH);
1020
1021         return 0;
1022 }
1023
1024 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1025 {
1026         nfs4_stateid stateid;
1027         uint32_t *p;
1028
1029         RESERVE_SPACE(16);
1030         if (ctx->state != NULL) {
1031                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1032                 WRITEMEM(stateid.data, sizeof(stateid.data));
1033         } else
1034                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1035 }
1036
1037 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1038 {
1039         uint32_t *p;
1040
1041         RESERVE_SPACE(4);
1042         WRITE32(OP_READ);
1043
1044         encode_stateid(xdr, args->context);
1045
1046         RESERVE_SPACE(12);
1047         WRITE64(args->offset);
1048         WRITE32(args->count);
1049
1050         return 0;
1051 }
1052
1053 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1054 {
1055         struct rpc_auth *auth = req->rq_task->tk_auth;
1056         uint32_t attrs[2] = {
1057                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1058                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1059         };
1060         int replen;
1061         uint32_t *p;
1062
1063         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1064         WRITE32(OP_READDIR);
1065         WRITE64(readdir->cookie);
1066         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1067         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1068         WRITE32(readdir->count);
1069         WRITE32(2);
1070         /* Switch to mounted_on_fileid if the server supports it */
1071         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1072                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1073         else
1074                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1075         WRITE32(attrs[0] & readdir->bitmask[0]);
1076         WRITE32(attrs[1] & readdir->bitmask[1]);
1077         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1078                         __FUNCTION__,
1079                         (unsigned long long)readdir->cookie,
1080                         ((u32 *)readdir->verifier.data)[0],
1081                         ((u32 *)readdir->verifier.data)[1],
1082                         attrs[0] & readdir->bitmask[0],
1083                         attrs[1] & readdir->bitmask[1]);
1084
1085         /* set up reply kvec
1086          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1087          *      + OP_READDIR + status + verifer(2)  = 9
1088          */
1089         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1090         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1091                          readdir->pgbase, readdir->count);
1092         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1093                         __FUNCTION__, replen, readdir->pages,
1094                         readdir->pgbase, readdir->count);
1095
1096         return 0;
1097 }
1098
1099 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1100 {
1101         struct rpc_auth *auth = req->rq_task->tk_auth;
1102         unsigned int replen;
1103         uint32_t *p;
1104
1105         RESERVE_SPACE(4);
1106         WRITE32(OP_READLINK);
1107
1108         /* set up reply kvec
1109          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1110          *      + OP_READLINK + status + string length = 8
1111          */
1112         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1113         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1114                         readlink->pgbase, readlink->pglen);
1115         
1116         return 0;
1117 }
1118
1119 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1120 {
1121         uint32_t *p;
1122
1123         RESERVE_SPACE(8 + name->len);
1124         WRITE32(OP_REMOVE);
1125         WRITE32(name->len);
1126         WRITEMEM(name->name, name->len);
1127
1128         return 0;
1129 }
1130
1131 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1132 {
1133         uint32_t *p;
1134
1135         RESERVE_SPACE(8 + oldname->len);
1136         WRITE32(OP_RENAME);
1137         WRITE32(oldname->len);
1138         WRITEMEM(oldname->name, oldname->len);
1139         
1140         RESERVE_SPACE(4 + newname->len);
1141         WRITE32(newname->len);
1142         WRITEMEM(newname->name, newname->len);
1143
1144         return 0;
1145 }
1146
1147 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1148 {
1149         uint32_t *p;
1150
1151         RESERVE_SPACE(12);
1152         WRITE32(OP_RENEW);
1153         WRITE64(client_stateid->cl_clientid);
1154
1155         return 0;
1156 }
1157
1158 static int
1159 encode_restorefh(struct xdr_stream *xdr)
1160 {
1161         uint32_t *p;
1162
1163         RESERVE_SPACE(4);
1164         WRITE32(OP_RESTOREFH);
1165
1166         return 0;
1167 }
1168
1169 static int
1170 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1171 {
1172         uint32_t *p;
1173
1174         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1175         WRITE32(OP_SETATTR);
1176         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1177         RESERVE_SPACE(2*4);
1178         WRITE32(1);
1179         WRITE32(FATTR4_WORD0_ACL);
1180         if (arg->acl_len % 4)
1181                 return -EINVAL;
1182         RESERVE_SPACE(4);
1183         WRITE32(arg->acl_len);
1184         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1185         return 0;
1186 }
1187
1188 static int
1189 encode_savefh(struct xdr_stream *xdr)
1190 {
1191         uint32_t *p;
1192
1193         RESERVE_SPACE(4);
1194         WRITE32(OP_SAVEFH);
1195
1196         return 0;
1197 }
1198
1199 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1200 {
1201         int status;
1202         uint32_t *p;
1203         
1204         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1205         WRITE32(OP_SETATTR);
1206         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1207
1208         if ((status = encode_attrs(xdr, arg->iap, server)))
1209                 return status;
1210
1211         return 0;
1212 }
1213
1214 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1215 {
1216         uint32_t *p;
1217
1218         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1219         WRITE32(OP_SETCLIENTID);
1220         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1221
1222         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1223         RESERVE_SPACE(4);
1224         WRITE32(setclientid->sc_prog);
1225         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1226         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1227         RESERVE_SPACE(4);
1228         WRITE32(setclientid->sc_cb_ident);
1229
1230         return 0;
1231 }
1232
1233 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1234 {
1235         uint32_t *p;
1236
1237         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1238         WRITE32(OP_SETCLIENTID_CONFIRM);
1239         WRITE64(client_state->cl_clientid);
1240         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1241
1242         return 0;
1243 }
1244
1245 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1246 {
1247         uint32_t *p;
1248
1249         RESERVE_SPACE(4);
1250         WRITE32(OP_WRITE);
1251
1252         encode_stateid(xdr, args->context);
1253
1254         RESERVE_SPACE(16);
1255         WRITE64(args->offset);
1256         WRITE32(args->stable);
1257         WRITE32(args->count);
1258
1259         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1260
1261         return 0;
1262 }
1263
1264 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1265 {
1266         uint32_t *p;
1267
1268         RESERVE_SPACE(20);
1269
1270         WRITE32(OP_DELEGRETURN);
1271         WRITEMEM(stateid->data, sizeof(stateid->data));
1272         return 0;
1273
1274 }
1275 /*
1276  * END OF "GENERIC" ENCODE ROUTINES.
1277  */
1278
1279 /*
1280  * Encode an ACCESS request
1281  */
1282 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1283 {
1284         struct xdr_stream xdr;
1285         struct compound_hdr hdr = {
1286                 .nops = 2,
1287         };
1288         int status;
1289
1290         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1291         encode_compound_hdr(&xdr, &hdr);
1292         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1293                 status = encode_access(&xdr, args->access);
1294         return status;
1295 }
1296
1297 /*
1298  * Encode LOOKUP request
1299  */
1300 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1301 {
1302         struct xdr_stream xdr;
1303         struct compound_hdr hdr = {
1304                 .nops = 4,
1305         };
1306         int status;
1307
1308         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1309         encode_compound_hdr(&xdr, &hdr);
1310         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1311                 goto out;
1312         if ((status = encode_lookup(&xdr, args->name)) != 0)
1313                 goto out;
1314         if ((status = encode_getfh(&xdr)) != 0)
1315                 goto out;
1316         status = encode_getfattr(&xdr, args->bitmask);
1317 out:
1318         return status;
1319 }
1320
1321 /*
1322  * Encode LOOKUP_ROOT request
1323  */
1324 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1325 {
1326         struct xdr_stream xdr;
1327         struct compound_hdr hdr = {
1328                 .nops = 3,
1329         };
1330         int status;
1331
1332         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1333         encode_compound_hdr(&xdr, &hdr);
1334         if ((status = encode_putrootfh(&xdr)) != 0)
1335                 goto out;
1336         if ((status = encode_getfh(&xdr)) == 0)
1337                 status = encode_getfattr(&xdr, args->bitmask);
1338 out:
1339         return status;
1340 }
1341
1342 /*
1343  * Encode REMOVE request
1344  */
1345 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1346 {
1347         struct xdr_stream xdr;
1348         struct compound_hdr hdr = {
1349                 .nops = 3,
1350         };
1351         int status;
1352
1353         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1354         encode_compound_hdr(&xdr, &hdr);
1355         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1356                 goto out;
1357         if ((status = encode_remove(&xdr, args->name)) != 0)
1358                 goto out;
1359         status = encode_getfattr(&xdr, args->bitmask);
1360 out:
1361         return status;
1362 }
1363
1364 /*
1365  * Encode RENAME request
1366  */
1367 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1368 {
1369         struct xdr_stream xdr;
1370         struct compound_hdr hdr = {
1371                 .nops = 7,
1372         };
1373         int status;
1374
1375         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1376         encode_compound_hdr(&xdr, &hdr);
1377         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1378                 goto out;
1379         if ((status = encode_savefh(&xdr)) != 0)
1380                 goto out;
1381         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1382                 goto out;
1383         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1384                 goto out;
1385         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1386                 goto out;
1387         if ((status = encode_restorefh(&xdr)) != 0)
1388                 goto out;
1389         status = encode_getfattr(&xdr, args->bitmask);
1390 out:
1391         return status;
1392 }
1393
1394 /*
1395  * Encode LINK request
1396  */
1397 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1398 {
1399         struct xdr_stream xdr;
1400         struct compound_hdr hdr = {
1401                 .nops = 7,
1402         };
1403         int status;
1404
1405         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1406         encode_compound_hdr(&xdr, &hdr);
1407         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1408                 goto out;
1409         if ((status = encode_savefh(&xdr)) != 0)
1410                 goto out;
1411         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1412                 goto out;
1413         if ((status = encode_link(&xdr, args->name)) != 0)
1414                 goto out;
1415         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1416                 goto out;
1417         if ((status = encode_restorefh(&xdr)) != 0)
1418                 goto out;
1419         status = encode_getfattr(&xdr, args->bitmask);
1420 out:
1421         return status;
1422 }
1423
1424 /*
1425  * Encode CREATE request
1426  */
1427 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1428 {
1429         struct xdr_stream xdr;
1430         struct compound_hdr hdr = {
1431                 .nops = 7,
1432         };
1433         int status;
1434
1435         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1436         encode_compound_hdr(&xdr, &hdr);
1437         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1438                 goto out;
1439         if ((status = encode_savefh(&xdr)) != 0)
1440                 goto out;
1441         if ((status = encode_create(&xdr, args)) != 0)
1442                 goto out;
1443         if ((status = encode_getfh(&xdr)) != 0)
1444                 goto out;
1445         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1446                 goto out;
1447         if ((status = encode_restorefh(&xdr)) != 0)
1448                 goto out;
1449         status = encode_getfattr(&xdr, args->bitmask);
1450 out:
1451         return status;
1452 }
1453
1454 /*
1455  * Encode SYMLINK request
1456  */
1457 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1458 {
1459         return nfs4_xdr_enc_create(req, p, args);
1460 }
1461
1462 /*
1463  * Encode GETATTR request
1464  */
1465 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1466 {
1467         struct xdr_stream xdr;
1468         struct compound_hdr hdr = {
1469                 .nops = 2,
1470         };
1471         int status;
1472
1473         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1474         encode_compound_hdr(&xdr, &hdr);
1475         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1476                 status = encode_getfattr(&xdr, args->bitmask);
1477         return status;
1478 }
1479
1480 /*
1481  * Encode a CLOSE request
1482  */
1483 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1484 {
1485         struct xdr_stream xdr;
1486         struct compound_hdr hdr = {
1487                 .nops   = 3,
1488         };
1489         int status;
1490
1491         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1492         encode_compound_hdr(&xdr, &hdr);
1493         status = encode_putfh(&xdr, args->fh);
1494         if(status)
1495                 goto out;
1496         status = encode_close(&xdr, args);
1497         if (status != 0)
1498                 goto out;
1499         status = encode_getfattr(&xdr, args->bitmask);
1500 out:
1501         return status;
1502 }
1503
1504 /*
1505  * Encode an OPEN request
1506  */
1507 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1508 {
1509         struct xdr_stream xdr;
1510         struct compound_hdr hdr = {
1511                 .nops = 7,
1512         };
1513         int status;
1514
1515         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1516         encode_compound_hdr(&xdr, &hdr);
1517         status = encode_putfh(&xdr, args->fh);
1518         if (status)
1519                 goto out;
1520         status = encode_savefh(&xdr);
1521         if (status)
1522                 goto out;
1523         status = encode_open(&xdr, args);
1524         if (status)
1525                 goto out;
1526         status = encode_getfh(&xdr);
1527         if (status)
1528                 goto out;
1529         status = encode_getfattr(&xdr, args->bitmask);
1530         if (status)
1531                 goto out;
1532         status = encode_restorefh(&xdr);
1533         if (status)
1534                 goto out;
1535         status = encode_getfattr(&xdr, args->bitmask);
1536 out:
1537         return status;
1538 }
1539
1540 /*
1541  * Encode an OPEN_CONFIRM request
1542  */
1543 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1544 {
1545         struct xdr_stream xdr;
1546         struct compound_hdr hdr = {
1547                 .nops   = 2,
1548         };
1549         int status;
1550
1551         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1552         encode_compound_hdr(&xdr, &hdr);
1553         status = encode_putfh(&xdr, args->fh);
1554         if(status)
1555                 goto out;
1556         status = encode_open_confirm(&xdr, args);
1557 out:
1558         return status;
1559 }
1560
1561 /*
1562  * Encode an OPEN request with no attributes.
1563  */
1564 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1565 {
1566         struct xdr_stream xdr;
1567         struct compound_hdr hdr = {
1568                 .nops   = 3,
1569         };
1570         int status;
1571
1572         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1573         encode_compound_hdr(&xdr, &hdr);
1574         status = encode_putfh(&xdr, args->fh);
1575         if (status)
1576                 goto out;
1577         status = encode_open(&xdr, args);
1578         if (status)
1579                 goto out;
1580         status = encode_getfattr(&xdr, args->bitmask);
1581 out:
1582         return status;
1583 }
1584
1585 /*
1586  * Encode an OPEN_DOWNGRADE request
1587  */
1588 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1589 {
1590         struct xdr_stream xdr;
1591         struct compound_hdr hdr = {
1592                 .nops   = 3,
1593         };
1594         int status;
1595
1596         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1597         encode_compound_hdr(&xdr, &hdr);
1598         status = encode_putfh(&xdr, args->fh);
1599         if (status)
1600                 goto out;
1601         status = encode_open_downgrade(&xdr, args);
1602         if (status != 0)
1603                 goto out;
1604         status = encode_getfattr(&xdr, args->bitmask);
1605 out:
1606         return status;
1607 }
1608
1609 /*
1610  * Encode a LOCK request
1611  */
1612 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lock_args *args)
1613 {
1614         struct xdr_stream xdr;
1615         struct compound_hdr hdr = {
1616                 .nops   = 2,
1617         };
1618         int status;
1619
1620         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1621         encode_compound_hdr(&xdr, &hdr);
1622         status = encode_putfh(&xdr, args->fh);
1623         if(status)
1624                 goto out;
1625         status = encode_lock(&xdr, args);
1626 out:
1627         return status;
1628 }
1629
1630 /*
1631  * Encode a LOCKT request
1632  */
1633 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockt_args *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_lockt(&xdr, args);
1647 out:
1648         return status;
1649 }
1650
1651 /*
1652  * Encode a LOCKU request
1653  */
1654 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_locku_args *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_locku(&xdr, args);
1668 out:
1669         return status;
1670 }
1671
1672 /*
1673  * Encode a READLINK request
1674  */
1675 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *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                 goto out;
1688         status = encode_readlink(&xdr, args, req);
1689 out:
1690         return status;
1691 }
1692
1693 /*
1694  * Encode a READDIR request
1695  */
1696 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1697 {
1698         struct xdr_stream xdr;
1699         struct compound_hdr hdr = {
1700                 .nops = 2,
1701         };
1702         int status;
1703
1704         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1705         encode_compound_hdr(&xdr, &hdr);
1706         status = encode_putfh(&xdr, args->fh);
1707         if(status)
1708                 goto out;
1709         status = encode_readdir(&xdr, args, req);
1710 out:
1711         return status;
1712 }
1713
1714 /*
1715  * Encode a READ request
1716  */
1717 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1718 {
1719         struct rpc_auth *auth = req->rq_task->tk_auth;
1720         struct xdr_stream xdr;
1721         struct compound_hdr hdr = {
1722                 .nops = 2,
1723         };
1724         int replen, status;
1725
1726         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1727         encode_compound_hdr(&xdr, &hdr);
1728         status = encode_putfh(&xdr, args->fh);
1729         if (status)
1730                 goto out;
1731         status = encode_read(&xdr, args);
1732         if (status)
1733                 goto out;
1734
1735         /* set up reply kvec
1736          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1737          *       + OP_READ + status + eof + datalen = 9
1738          */
1739         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1740         xdr_inline_pages(&req->rq_rcv_buf, replen,
1741                          args->pages, args->pgbase, args->count);
1742 out:
1743         return status;
1744 }
1745
1746 /*
1747  * Encode an SETATTR request
1748  */
1749 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1750
1751 {
1752         struct xdr_stream xdr;
1753         struct compound_hdr hdr = {
1754                 .nops   = 3,
1755         };
1756         int status;
1757
1758         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1759         encode_compound_hdr(&xdr, &hdr);
1760         status = encode_putfh(&xdr, args->fh);
1761         if(status)
1762                 goto out;
1763         status = encode_setattr(&xdr, args, args->server);
1764         if(status)
1765                 goto out;
1766         status = encode_getfattr(&xdr, args->bitmask);
1767 out:
1768         return status;
1769 }
1770
1771 /*
1772  * Encode a GETACL request
1773  */
1774 static int
1775 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1776                 struct nfs_getaclargs *args)
1777 {
1778         struct xdr_stream xdr;
1779         struct rpc_auth *auth = req->rq_task->tk_auth;
1780         struct compound_hdr hdr = {
1781                 .nops   = 2,
1782         };
1783         int replen, status;
1784
1785         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1786         encode_compound_hdr(&xdr, &hdr);
1787         status = encode_putfh(&xdr, args->fh);
1788         if (status)
1789                 goto out;
1790         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1791         /* set up reply buffer: */
1792         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1793         xdr_inline_pages(&req->rq_rcv_buf, replen,
1794                 args->acl_pages, args->acl_pgbase, args->acl_len);
1795 out:
1796         return status;
1797 }
1798
1799 /*
1800  * Encode a WRITE request
1801  */
1802 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1803 {
1804         struct xdr_stream xdr;
1805         struct compound_hdr hdr = {
1806                 .nops = 3,
1807         };
1808         int status;
1809
1810         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1811         encode_compound_hdr(&xdr, &hdr);
1812         status = encode_putfh(&xdr, args->fh);
1813         if (status)
1814                 goto out;
1815         status = encode_write(&xdr, args);
1816         if (status)
1817                 goto out;
1818         status = encode_getfattr(&xdr, args->bitmask);
1819 out:
1820         return status;
1821 }
1822
1823 /*
1824  *  a COMMIT request
1825  */
1826 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1827 {
1828         struct xdr_stream xdr;
1829         struct compound_hdr hdr = {
1830                 .nops = 3,
1831         };
1832         int status;
1833
1834         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1835         encode_compound_hdr(&xdr, &hdr);
1836         status = encode_putfh(&xdr, args->fh);
1837         if (status)
1838                 goto out;
1839         status = encode_commit(&xdr, args);
1840         if (status)
1841                 goto out;
1842         status = encode_getfattr(&xdr, args->bitmask);
1843 out:
1844         return status;
1845 }
1846
1847 /*
1848  * FSINFO request
1849  */
1850 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1851 {
1852         struct xdr_stream xdr;
1853         struct compound_hdr hdr = {
1854                 .nops   = 2,
1855         };
1856         int status;
1857
1858         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1859         encode_compound_hdr(&xdr, &hdr);
1860         status = encode_putfh(&xdr, args->fh);
1861         if (!status)
1862                 status = encode_fsinfo(&xdr, args->bitmask);
1863         return status;
1864 }
1865
1866 /*
1867  * a PATHCONF request
1868  */
1869 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1870 {
1871         struct xdr_stream xdr;
1872         struct compound_hdr hdr = {
1873                 .nops = 2,
1874         };
1875         int status;
1876
1877         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1878         encode_compound_hdr(&xdr, &hdr);
1879         status = encode_putfh(&xdr, args->fh);
1880         if (!status)
1881                 status = encode_getattr_one(&xdr,
1882                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1883         return status;
1884 }
1885
1886 /*
1887  * a STATFS request
1888  */
1889 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1890 {
1891         struct xdr_stream xdr;
1892         struct compound_hdr hdr = {
1893                 .nops = 2,
1894         };
1895         int status;
1896
1897         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1898         encode_compound_hdr(&xdr, &hdr);
1899         status = encode_putfh(&xdr, args->fh);
1900         if (status == 0)
1901                 status = encode_getattr_two(&xdr,
1902                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1903                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1904         return status;
1905 }
1906
1907 /*
1908  * GETATTR_BITMAP request
1909  */
1910 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1911 {
1912         struct xdr_stream xdr;
1913         struct compound_hdr hdr = {
1914                 .nops = 2,
1915         };
1916         int status;
1917
1918         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1919         encode_compound_hdr(&xdr, &hdr);
1920         status = encode_putfh(&xdr, fhandle);
1921         if (status == 0)
1922                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1923                                 FATTR4_WORD0_LINK_SUPPORT|
1924                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1925                                 FATTR4_WORD0_ACLSUPPORT);
1926         return status;
1927 }
1928
1929 /*
1930  * a RENEW request
1931  */
1932 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1933 {
1934         struct xdr_stream xdr;
1935         struct compound_hdr hdr = {
1936                 .nops   = 1,
1937         };
1938
1939         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1940         encode_compound_hdr(&xdr, &hdr);
1941         return encode_renew(&xdr, clp);
1942 }
1943
1944 /*
1945  * a SETCLIENTID request
1946  */
1947 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1948 {
1949         struct xdr_stream xdr;
1950         struct compound_hdr hdr = {
1951                 .nops   = 1,
1952         };
1953
1954         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1955         encode_compound_hdr(&xdr, &hdr);
1956         return encode_setclientid(&xdr, sc);
1957 }
1958
1959 /*
1960  * a SETCLIENTID_CONFIRM request
1961  */
1962 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1963 {
1964         struct xdr_stream xdr;
1965         struct compound_hdr hdr = {
1966                 .nops   = 3,
1967         };
1968         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1969         int status;
1970
1971         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1972         encode_compound_hdr(&xdr, &hdr);
1973         status = encode_setclientid_confirm(&xdr, clp);
1974         if (!status)
1975                 status = encode_putrootfh(&xdr);
1976         if (!status)
1977                 status = encode_fsinfo(&xdr, lease_bitmap);
1978         return status;
1979 }
1980
1981 /*
1982  * DELEGRETURN request
1983  */
1984 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1985 {
1986         struct xdr_stream xdr;
1987         struct compound_hdr hdr = {
1988                 .nops = 3,
1989         };
1990         int status;
1991
1992         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1993         encode_compound_hdr(&xdr, &hdr);
1994         status = encode_putfh(&xdr, args->fhandle);
1995         if (status != 0)
1996                 goto out;
1997         status = encode_delegreturn(&xdr, args->stateid);
1998         if (status != 0)
1999                 goto out;
2000         status = encode_getfattr(&xdr, args->bitmask);
2001 out:
2002         return status;
2003 }
2004
2005 /*
2006  * START OF "GENERIC" DECODE ROUTINES.
2007  *   These may look a little ugly since they are imported from a "generic"
2008  * set of XDR encode/decode routines which are intended to be shared by
2009  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2010  *
2011  * If the pain of reading these is too great, it should be a straightforward
2012  * task to translate them into Linux-specific versions which are more
2013  * consistent with the style used in NFSv2/v3...
2014  */
2015 #define READ32(x)         (x) = ntohl(*p++)
2016 #define READ64(x)         do {                  \
2017         (x) = (u64)ntohl(*p++) << 32;           \
2018         (x) |= ntohl(*p++);                     \
2019 } while (0)
2020 #define READTIME(x)       do {                  \
2021         p++;                                    \
2022         (x.tv_sec) = ntohl(*p++);               \
2023         (x.tv_nsec) = ntohl(*p++);              \
2024 } while (0)
2025 #define COPYMEM(x,nbytes) do {                  \
2026         memcpy((x), p, nbytes);                 \
2027         p += XDR_QUADLEN(nbytes);               \
2028 } while (0)
2029
2030 #define READ_BUF(nbytes)  do { \
2031         p = xdr_inline_decode(xdr, nbytes); \
2032         if (!p) { \
2033                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2034                                 __FUNCTION__, __LINE__); \
2035                 return -EIO; \
2036         } \
2037 } while (0)
2038
2039 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
2040 {
2041         uint32_t *p;
2042
2043         READ_BUF(4);
2044         READ32(*len);
2045         READ_BUF(*len);
2046         *string = (char *)p;
2047         return 0;
2048 }
2049
2050 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2051 {
2052         uint32_t *p;
2053
2054         READ_BUF(8);
2055         READ32(hdr->status);
2056         READ32(hdr->taglen);
2057         
2058         READ_BUF(hdr->taglen + 4);
2059         hdr->tag = (char *)p;
2060         p += XDR_QUADLEN(hdr->taglen);
2061         READ32(hdr->nops);
2062         return 0;
2063 }
2064
2065 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2066 {
2067         uint32_t *p;
2068         uint32_t opnum;
2069         int32_t nfserr;
2070
2071         READ_BUF(8);
2072         READ32(opnum);
2073         if (opnum != expected) {
2074                 printk(KERN_NOTICE
2075                                 "nfs4_decode_op_hdr: Server returned operation"
2076                                 " %d but we issued a request for %d\n",
2077                                 opnum, expected);
2078                 return -EIO;
2079         }
2080         READ32(nfserr);
2081         if (nfserr != NFS_OK)
2082                 return -nfs_stat_to_errno(nfserr);
2083         return 0;
2084 }
2085
2086 /* Dummy routine */
2087 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2088 {
2089         uint32_t *p;
2090         uint32_t strlen;
2091         char *str;
2092
2093         READ_BUF(12);
2094         return decode_opaque_inline(xdr, &strlen, &str);
2095 }
2096
2097 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2098 {
2099         uint32_t bmlen, *p;
2100
2101         READ_BUF(4);
2102         READ32(bmlen);
2103
2104         bitmap[0] = bitmap[1] = 0;
2105         READ_BUF((bmlen << 2));
2106         if (bmlen > 0) {
2107                 READ32(bitmap[0]);
2108                 if (bmlen > 1)
2109                         READ32(bitmap[1]);
2110         }
2111         return 0;
2112 }
2113
2114 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2115 {
2116         uint32_t *p;
2117
2118         READ_BUF(4);
2119         READ32(*attrlen);
2120         *savep = xdr->p;
2121         return 0;
2122 }
2123
2124 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2125 {
2126         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2127                 decode_attr_bitmap(xdr, bitmask);
2128                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2129         } else
2130                 bitmask[0] = bitmask[1] = 0;
2131         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2132         return 0;
2133 }
2134
2135 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2136 {
2137         uint32_t *p;
2138
2139         *type = 0;
2140         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2141                 return -EIO;
2142         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2143                 READ_BUF(4);
2144                 READ32(*type);
2145                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2146                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2147                         return -EIO;
2148                 }
2149                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2150         }
2151         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2152         return 0;
2153 }
2154
2155 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2156 {
2157         uint32_t *p;
2158
2159         *change = 0;
2160         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2161                 return -EIO;
2162         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2163                 READ_BUF(8);
2164                 READ64(*change);
2165                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2166         }
2167         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2168                         (unsigned long long)*change);
2169         return 0;
2170 }
2171
2172 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2173 {
2174         uint32_t *p;
2175
2176         *size = 0;
2177         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2178                 return -EIO;
2179         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2180                 READ_BUF(8);
2181                 READ64(*size);
2182                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2183         }
2184         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2185         return 0;
2186 }
2187
2188 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2189 {
2190         uint32_t *p;
2191
2192         *res = 0;
2193         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2194                 return -EIO;
2195         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2196                 READ_BUF(4);
2197                 READ32(*res);
2198                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2199         }
2200         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2201         return 0;
2202 }
2203
2204 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2205 {
2206         uint32_t *p;
2207
2208         *res = 0;
2209         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2210                 return -EIO;
2211         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2212                 READ_BUF(4);
2213                 READ32(*res);
2214                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2215         }
2216         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2217         return 0;
2218 }
2219
2220 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2221 {
2222         uint32_t *p;
2223
2224         fsid->major = 0;
2225         fsid->minor = 0;
2226         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2227                 return -EIO;
2228         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2229                 READ_BUF(16);
2230                 READ64(fsid->major);
2231                 READ64(fsid->minor);
2232                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2233         }
2234         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2235                         (unsigned long long)fsid->major,
2236                         (unsigned long long)fsid->minor);
2237         return 0;
2238 }
2239
2240 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2241 {
2242         uint32_t *p;
2243
2244         *res = 60;
2245         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2246                 return -EIO;
2247         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2248                 READ_BUF(4);
2249                 READ32(*res);
2250                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2251         }
2252         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2253         return 0;
2254 }
2255
2256 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2257 {
2258         uint32_t *p;
2259
2260         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2261         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2262                 return -EIO;
2263         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2264                 READ_BUF(4);
2265                 READ32(*res);
2266                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2267         }
2268         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2269         return 0;
2270 }
2271
2272 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2273 {
2274         uint32_t *p;
2275
2276         *fileid = 0;
2277         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2278                 return -EIO;
2279         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2280                 READ_BUF(8);
2281                 READ64(*fileid);
2282                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2283         }
2284         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2285         return 0;
2286 }
2287
2288 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2289 {
2290         uint32_t *p;
2291         int status = 0;
2292
2293         *res = 0;
2294         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2295                 return -EIO;
2296         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2297                 READ_BUF(8);
2298                 READ64(*res);
2299                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2300         }
2301         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2302         return status;
2303 }
2304
2305 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2306 {
2307         uint32_t *p;
2308         int status = 0;
2309
2310         *res = 0;
2311         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2312                 return -EIO;
2313         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2314                 READ_BUF(8);
2315                 READ64(*res);
2316                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2317         }
2318         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2319         return status;
2320 }
2321
2322 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2323 {
2324         uint32_t *p;
2325         int status = 0;
2326
2327         *res = 0;
2328         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2329                 return -EIO;
2330         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2331                 READ_BUF(8);
2332                 READ64(*res);
2333                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2334         }
2335         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2336         return status;
2337 }
2338
2339 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2340 {
2341         uint32_t *p;
2342         int status = 0;
2343
2344         *res = 0;
2345         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2346                 return -EIO;
2347         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2348                 READ_BUF(8);
2349                 READ64(*res);
2350                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2351         }
2352         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2353         return status;
2354 }
2355
2356 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2357 {
2358         uint32_t *p;
2359         int status = 0;
2360
2361         *maxlink = 1;
2362         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2363                 return -EIO;
2364         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2365                 READ_BUF(4);
2366                 READ32(*maxlink);
2367                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2368         }
2369         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2370         return status;
2371 }
2372
2373 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2374 {
2375         uint32_t *p;
2376         int status = 0;
2377
2378         *maxname = 1024;
2379         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2380                 return -EIO;
2381         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2382                 READ_BUF(4);
2383                 READ32(*maxname);
2384                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2385         }
2386         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2387         return status;
2388 }
2389
2390 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2391 {
2392         uint32_t *p;
2393         int status = 0;
2394
2395         *res = 1024;
2396         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2397                 return -EIO;
2398         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2399                 uint64_t maxread;
2400                 READ_BUF(8);
2401                 READ64(maxread);
2402                 if (maxread > 0x7FFFFFFF)
2403                         maxread = 0x7FFFFFFF;
2404                 *res = (uint32_t)maxread;
2405                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2406         }
2407         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2408         return status;
2409 }
2410
2411 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2412 {
2413         uint32_t *p;
2414         int status = 0;
2415
2416         *res = 1024;
2417         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2418                 return -EIO;
2419         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2420                 uint64_t maxwrite;
2421                 READ_BUF(8);
2422                 READ64(maxwrite);
2423                 if (maxwrite > 0x7FFFFFFF)
2424                         maxwrite = 0x7FFFFFFF;
2425                 *res = (uint32_t)maxwrite;
2426                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2427         }
2428         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2429         return status;
2430 }
2431
2432 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2433 {
2434         uint32_t *p;
2435
2436         *mode = 0;
2437         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2438                 return -EIO;
2439         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2440                 READ_BUF(4);
2441                 READ32(*mode);
2442                 *mode &= ~S_IFMT;
2443                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2444         }
2445         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2446         return 0;
2447 }
2448
2449 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2450 {
2451         uint32_t *p;
2452
2453         *nlink = 1;
2454         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2455                 return -EIO;
2456         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2457                 READ_BUF(4);
2458                 READ32(*nlink);
2459                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2460         }
2461         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2462         return 0;
2463 }
2464
2465 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2466 {
2467         uint32_t len, *p;
2468
2469         *uid = -2;
2470         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2471                 return -EIO;
2472         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2473                 READ_BUF(4);
2474                 READ32(len);
2475                 READ_BUF(len);
2476                 if (len < XDR_MAX_NETOBJ) {
2477                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2478                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2479                                                 __FUNCTION__);
2480                 } else
2481                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2482                                         __FUNCTION__, len);
2483                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2484         }
2485         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2486         return 0;
2487 }
2488
2489 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2490 {
2491         uint32_t len, *p;
2492
2493         *gid = -2;
2494         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2495                 return -EIO;
2496         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2497                 READ_BUF(4);
2498                 READ32(len);
2499                 READ_BUF(len);
2500                 if (len < XDR_MAX_NETOBJ) {
2501                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2502                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2503                                                 __FUNCTION__);
2504                 } else
2505                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2506                                         __FUNCTION__, len);
2507                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2508         }
2509         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2510         return 0;
2511 }
2512
2513 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2514 {
2515         uint32_t major = 0, minor = 0, *p;
2516
2517         *rdev = MKDEV(0,0);
2518         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2519                 return -EIO;
2520         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2521                 dev_t tmp;
2522
2523                 READ_BUF(8);
2524                 READ32(major);
2525                 READ32(minor);
2526                 tmp = MKDEV(major, minor);
2527                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2528                         *rdev = tmp;
2529                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2530         }
2531         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2532         return 0;
2533 }
2534
2535 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2536 {
2537         uint32_t *p;
2538         int status = 0;
2539
2540         *res = 0;
2541         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2542                 return -EIO;
2543         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2544                 READ_BUF(8);
2545                 READ64(*res);
2546                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2547         }
2548         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2549         return status;
2550 }
2551
2552 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2553 {
2554         uint32_t *p;
2555         int status = 0;
2556
2557         *res = 0;
2558         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2559                 return -EIO;
2560         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2561                 READ_BUF(8);
2562                 READ64(*res);
2563                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2564         }
2565         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2566         return status;
2567 }
2568
2569 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2570 {
2571         uint32_t *p;
2572         int status = 0;
2573
2574         *res = 0;
2575         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2576                 return -EIO;
2577         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2578                 READ_BUF(8);
2579                 READ64(*res);
2580                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2581         }
2582         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2583         return status;
2584 }
2585
2586 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2587 {
2588         uint32_t *p;
2589
2590         *used = 0;
2591         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2592                 return -EIO;
2593         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2594                 READ_BUF(8);
2595                 READ64(*used);
2596                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2597         }
2598         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2599                         (unsigned long long)*used);
2600         return 0;
2601 }
2602
2603 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2604 {
2605         uint32_t *p;
2606         uint64_t sec;
2607         uint32_t nsec;
2608
2609         READ_BUF(12);
2610         READ64(sec);
2611         READ32(nsec);
2612         time->tv_sec = (time_t)sec;
2613         time->tv_nsec = (long)nsec;
2614         return 0;
2615 }
2616
2617 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2618 {
2619         int status = 0;
2620
2621         time->tv_sec = 0;
2622         time->tv_nsec = 0;
2623         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2624                 return -EIO;
2625         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2626                 status = decode_attr_time(xdr, time);
2627                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2628         }
2629         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2630         return status;
2631 }
2632
2633 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2634 {
2635         int status = 0;
2636
2637         time->tv_sec = 0;
2638         time->tv_nsec = 0;
2639         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2640                 return -EIO;
2641         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2642                 status = decode_attr_time(xdr, time);
2643                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2644         }
2645         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2646         return status;
2647 }
2648
2649 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2650 {
2651         int status = 0;
2652
2653         time->tv_sec = 0;
2654         time->tv_nsec = 0;
2655         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2656                 return -EIO;
2657         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2658                 status = decode_attr_time(xdr, time);
2659                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2660         }
2661         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2662         return status;
2663 }
2664
2665 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2666 {
2667         unsigned int attrwords = XDR_QUADLEN(attrlen);
2668         unsigned int nwords = xdr->p - savep;
2669
2670         if (unlikely(attrwords != nwords)) {
2671                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2672                                 __FUNCTION__,
2673                                 attrwords << 2,
2674                                 (attrwords < nwords) ? '<' : '>',
2675                                 nwords << 2);
2676                 return -EIO;
2677         }
2678         return 0;
2679 }
2680
2681 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2682 {
2683         uint32_t *p;
2684
2685         READ_BUF(20);
2686         READ32(cinfo->atomic);
2687         READ64(cinfo->before);
2688         READ64(cinfo->after);
2689         return 0;
2690 }
2691
2692 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2693 {
2694         uint32_t *p;
2695         uint32_t supp, acc;
2696         int status;
2697
2698         status = decode_op_hdr(xdr, OP_ACCESS);
2699         if (status)
2700                 return status;
2701         READ_BUF(8);
2702         READ32(supp);
2703         READ32(acc);
2704         access->supported = supp;
2705         access->access = acc;
2706         return 0;
2707 }
2708
2709 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2710 {
2711         uint32_t *p;
2712         int status;
2713
2714         status = decode_op_hdr(xdr, OP_CLOSE);
2715         if (status)
2716                 return status;
2717         READ_BUF(sizeof(res->stateid.data));
2718         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2719         return 0;
2720 }
2721
2722 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2723 {
2724         uint32_t *p;
2725         int status;
2726
2727         status = decode_op_hdr(xdr, OP_COMMIT);
2728         if (status)
2729                 return status;
2730         READ_BUF(8);
2731         COPYMEM(res->verf->verifier, 8);
2732         return 0;
2733 }
2734
2735 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2736 {
2737         uint32_t *p;
2738         uint32_t bmlen;
2739         int status;
2740
2741         status = decode_op_hdr(xdr, OP_CREATE);
2742         if (status)
2743                 return status;
2744         if ((status = decode_change_info(xdr, cinfo)))
2745                 return status;
2746         READ_BUF(4);
2747         READ32(bmlen);
2748         READ_BUF(bmlen << 2);
2749         return 0;
2750 }
2751
2752 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2753 {
2754         uint32_t *savep;
2755         uint32_t attrlen, 
2756                  bitmap[2] = {0};
2757         int status;
2758
2759         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2760                 goto xdr_error;
2761         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2762                 goto xdr_error;
2763         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2764                 goto xdr_error;
2765         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2766                 goto xdr_error;
2767         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2768                 goto xdr_error;
2769         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2770                 goto xdr_error;
2771         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2772                 goto xdr_error;
2773         status = verify_attr_len(xdr, savep, attrlen);
2774 xdr_error:
2775         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2776         return status;
2777 }
2778         
2779 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2780 {
2781         uint32_t *savep;
2782         uint32_t attrlen, 
2783                  bitmap[2] = {0};
2784         int status;
2785         
2786         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2787                 goto xdr_error;
2788         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2789                 goto xdr_error;
2790         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2791                 goto xdr_error;
2792
2793         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2794                 goto xdr_error;
2795         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2796                 goto xdr_error;
2797         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2798                 goto xdr_error;
2799         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2800                 goto xdr_error;
2801         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2802                 goto xdr_error;
2803         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2804                 goto xdr_error;
2805
2806         status = verify_attr_len(xdr, savep, attrlen);
2807 xdr_error:
2808         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2809         return status;
2810 }
2811
2812 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2813 {
2814         uint32_t *savep;
2815         uint32_t attrlen, 
2816                  bitmap[2] = {0};
2817         int status;
2818         
2819         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2820                 goto xdr_error;
2821         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2822                 goto xdr_error;
2823         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2824                 goto xdr_error;
2825
2826         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2827                 goto xdr_error;
2828         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2829                 goto xdr_error;
2830
2831         status = verify_attr_len(xdr, savep, attrlen);
2832 xdr_error:
2833         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2834         return status;
2835 }
2836
2837 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2838 {
2839         uint32_t *savep;
2840         uint32_t attrlen,
2841                  bitmap[2] = {0},
2842                  type;
2843         int status, fmode = 0;
2844
2845         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2846                 goto xdr_error;
2847         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2848                 goto xdr_error;
2849
2850         fattr->bitmap[0] = bitmap[0];
2851         fattr->bitmap[1] = bitmap[1];
2852
2853         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2854                 goto xdr_error;
2855
2856
2857         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2858                 goto xdr_error;
2859         fattr->type = nfs_type2fmt[type].nfs2type;
2860         fmode = nfs_type2fmt[type].mode;
2861
2862         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2863                 goto xdr_error;
2864         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2865                 goto xdr_error;
2866         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2867                 goto xdr_error;
2868         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2869                 goto xdr_error;
2870         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2871                 goto xdr_error;
2872         fattr->mode |= fmode;
2873         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2876                 goto xdr_error;
2877         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2878                 goto xdr_error;
2879         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2880                 goto xdr_error;
2881         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2882                 goto xdr_error;
2883         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2884                 goto xdr_error;
2885         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2886                 goto xdr_error;
2887         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2888                 goto xdr_error;
2889         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2890                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2891 xdr_error:
2892         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2893         return status;
2894 }
2895
2896
2897 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2898 {
2899         uint32_t *savep;
2900         uint32_t attrlen, bitmap[2];
2901         int status;
2902
2903         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2904                 goto xdr_error;
2905         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2906                 goto xdr_error;
2907         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2908                 goto xdr_error;
2909
2910         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2911
2912         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2913                 goto xdr_error;
2914         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2915                 goto xdr_error;
2916         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2917                 goto xdr_error;
2918         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2919         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2920                 goto xdr_error;
2921         fsinfo->wtpref = fsinfo->wtmax;
2922
2923         status = verify_attr_len(xdr, savep, attrlen);
2924 xdr_error:
2925         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2926         return status;
2927 }
2928
2929 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2930 {
2931         uint32_t *p;
2932         uint32_t len;
2933         int status;
2934
2935         status = decode_op_hdr(xdr, OP_GETFH);
2936         if (status)
2937                 return status;
2938         /* Zero handle first to allow comparisons */
2939         memset(fh, 0, sizeof(*fh));
2940
2941         READ_BUF(4);
2942         READ32(len);
2943         if (len > NFS4_FHSIZE)
2944                 return -EIO;
2945         fh->size = len;
2946         READ_BUF(len);
2947         COPYMEM(fh->data, len);
2948         return 0;
2949 }
2950
2951 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2952 {
2953         int status;
2954         
2955         status = decode_op_hdr(xdr, OP_LINK);
2956         if (status)
2957                 return status;
2958         return decode_change_info(xdr, cinfo);
2959 }
2960
2961 /*
2962  * We create the owner, so we know a proper owner.id length is 4.
2963  */
2964 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
2965 {
2966         uint64_t offset, length, clientid;
2967         uint32_t *p;
2968         uint32_t namelen, type;
2969
2970         READ_BUF(32);
2971         READ64(offset);
2972         READ64(length);
2973         READ32(type);
2974         if (fl != NULL) {
2975                 fl->fl_start = (loff_t)offset;
2976                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
2977                 if (length == ~(uint64_t)0)
2978                         fl->fl_end = OFFSET_MAX;
2979                 fl->fl_type = F_WRLCK;
2980                 if (type & 1)
2981                         fl->fl_type = F_RDLCK;
2982                 fl->fl_pid = 0;
2983         }
2984         READ64(clientid);
2985         READ32(namelen);
2986         READ_BUF(namelen);
2987         return -NFS4ERR_DENIED;
2988 }
2989
2990 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
2991 {
2992         uint32_t *p;
2993         int status;
2994
2995         status = decode_op_hdr(xdr, OP_LOCK);
2996         if (status == 0) {
2997                 READ_BUF(sizeof(res->stateid.data));
2998                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2999         } else if (status == -NFS4ERR_DENIED)
3000                 return decode_lock_denied(xdr, NULL);
3001         return status;
3002 }
3003
3004 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3005 {
3006         int status;
3007         status = decode_op_hdr(xdr, OP_LOCKT);
3008         if (status == -NFS4ERR_DENIED)
3009                 return decode_lock_denied(xdr, res->denied);
3010         return status;
3011 }
3012
3013 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3014 {
3015         uint32_t *p;
3016         int status;
3017
3018         status = decode_op_hdr(xdr, OP_LOCKU);
3019         if (status == 0) {
3020                 READ_BUF(sizeof(res->stateid.data));
3021                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3022         }
3023         return status;
3024 }
3025
3026 static int decode_lookup(struct xdr_stream *xdr)
3027 {
3028         return decode_op_hdr(xdr, OP_LOOKUP);
3029 }
3030
3031 /* This is too sick! */
3032 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3033 {
3034         uint32_t *p;
3035         uint32_t limit_type, nblocks, blocksize;
3036
3037         READ_BUF(12);
3038         READ32(limit_type);
3039         switch (limit_type) {
3040                 case 1:
3041                         READ64(*maxsize);
3042                         break;
3043                 case 2:
3044                         READ32(nblocks);
3045                         READ32(blocksize);
3046                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3047         }
3048         return 0;
3049 }
3050
3051 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3052 {
3053         uint32_t *p;
3054         uint32_t delegation_type;
3055
3056         READ_BUF(4);
3057         READ32(delegation_type);
3058         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3059                 res->delegation_type = 0;
3060                 return 0;
3061         }
3062         READ_BUF(20);
3063         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3064         READ32(res->do_recall);
3065         switch (delegation_type) {
3066                 case NFS4_OPEN_DELEGATE_READ:
3067                         res->delegation_type = FMODE_READ;
3068                         break;
3069                 case NFS4_OPEN_DELEGATE_WRITE:
3070                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3071                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3072                                 return -EIO;
3073         }
3074         return decode_ace(xdr, NULL, res->server->nfs4_state);
3075 }
3076
3077 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3078 {
3079         uint32_t *p;
3080         uint32_t bmlen;
3081         int status;
3082
3083         status = decode_op_hdr(xdr, OP_OPEN);
3084         if (status)
3085                 return status;
3086         READ_BUF(sizeof(res->stateid.data));
3087         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3088
3089         decode_change_info(xdr, &res->cinfo);
3090
3091         READ_BUF(8);
3092         READ32(res->rflags);
3093         READ32(bmlen);
3094         if (bmlen > 10)
3095                 goto xdr_error;
3096
3097         READ_BUF(bmlen << 2);
3098         p += bmlen;
3099         return decode_delegation(xdr, res);
3100 xdr_error:
3101         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3102         return -EIO;
3103 }
3104
3105 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3106 {
3107         uint32_t *p;
3108         int status;
3109
3110         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3111         if (status)
3112                 return status;
3113         READ_BUF(sizeof(res->stateid.data));
3114         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3115         return 0;
3116 }
3117
3118 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3119 {
3120         uint32_t *p;
3121         int status;
3122
3123         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3124         if (status)
3125                 return status;
3126         READ_BUF(sizeof(res->stateid.data));
3127         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3128         return 0;
3129 }
3130
3131 static int decode_putfh(struct xdr_stream *xdr)
3132 {
3133         return decode_op_hdr(xdr, OP_PUTFH);
3134 }
3135
3136 static int decode_putrootfh(struct xdr_stream *xdr)
3137 {
3138         return decode_op_hdr(xdr, OP_PUTROOTFH);
3139 }
3140
3141 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3142 {
3143         struct kvec *iov = req->rq_rcv_buf.head;
3144         uint32_t *p;
3145         uint32_t count, eof, recvd, hdrlen;
3146         int status;
3147
3148         status = decode_op_hdr(xdr, OP_READ);
3149         if (status)
3150                 return status;
3151         READ_BUF(8);
3152         READ32(eof);
3153         READ32(count);
3154         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3155         recvd = req->rq_rcv_buf.len - hdrlen;
3156         if (count > recvd) {
3157                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3158                                 "count %u > recvd %u\n", count, recvd);
3159                 count = recvd;
3160                 eof = 0;
3161         }
3162         xdr_read_pages(xdr, count);
3163         res->eof = eof;
3164         res->count = count;
3165         return 0;
3166 }
3167
3168 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3169 {
3170         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3171         struct page     *page = *rcvbuf->pages;
3172         struct kvec     *iov = rcvbuf->head;
3173         unsigned int    nr, pglen = rcvbuf->page_len;
3174         uint32_t        *end, *entry, *p, *kaddr;
3175         uint32_t        len, attrlen;
3176         int             hdrlen, recvd, status;
3177
3178         status = decode_op_hdr(xdr, OP_READDIR);
3179         if (status)
3180                 return status;
3181         READ_BUF(8);
3182         COPYMEM(readdir->verifier.data, 8);
3183         dprintk("%s: verifier = 0x%x%x\n",
3184                         __FUNCTION__,
3185                         ((u32 *)readdir->verifier.data)[0],
3186                         ((u32 *)readdir->verifier.data)[1]);
3187
3188
3189         hdrlen = (char *) p - (char *) iov->iov_base;
3190         recvd = rcvbuf->len - hdrlen;
3191         if (pglen > recvd)
3192                 pglen = recvd;
3193         xdr_read_pages(xdr, pglen);
3194
3195         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3196         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3197         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3198         entry = p;
3199         for (nr = 0; *p++; nr++) {
3200                 if (p + 3 > end)
3201                         goto short_pkt;
3202                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3203                 p += 2;                 /* cookie */
3204                 len = ntohl(*p++);      /* filename length */
3205                 if (len > NFS4_MAXNAMLEN) {
3206                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3207                         goto err_unmap;
3208                 }
3209                 dprintk("filename = %*s\n", len, (char *)p);
3210                 p += XDR_QUADLEN(len);
3211                 if (p + 1 > end)
3212                         goto short_pkt;
3213                 len = ntohl(*p++);      /* bitmap length */
3214                 p += len;
3215                 if (p + 1 > end)
3216                         goto short_pkt;
3217                 attrlen = XDR_QUADLEN(ntohl(*p++));
3218                 p += attrlen;           /* attributes */
3219                 if (p + 2 > end)
3220                         goto short_pkt;
3221                 entry = p;
3222         }
3223         if (!nr && (entry[0] != 0 || entry[1] == 0))
3224                 goto short_pkt;
3225 out:    
3226         kunmap_atomic(kaddr, KM_USER0);
3227         return 0;
3228 short_pkt:
3229         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3230         entry[0] = entry[1] = 0;
3231         /* truncate listing ? */
3232         if (!nr) {
3233                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3234                 entry[1] = 1;
3235         }
3236         goto out;
3237 err_unmap:
3238         kunmap_atomic(kaddr, KM_USER0);
3239         return -errno_NFSERR_IO;
3240 }
3241
3242 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3243 {
3244         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3245         struct kvec *iov = rcvbuf->head;
3246         int hdrlen, len, recvd;
3247         uint32_t *p;
3248         char *kaddr;
3249         int status;
3250
3251         status = decode_op_hdr(xdr, OP_READLINK);
3252         if (status)
3253                 return status;
3254
3255         /* Convert length of symlink */
3256         READ_BUF(4);
3257         READ32(len);
3258         if (len >= rcvbuf->page_len || len <= 0) {
3259                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3260                 return -ENAMETOOLONG;
3261         }
3262         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3263         recvd = req->rq_rcv_buf.len - hdrlen;
3264         if (recvd < len) {
3265                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3266                                 "count %u > recvd %u\n", len, recvd);
3267                 return -EIO;
3268         }
3269         xdr_read_pages(xdr, len);
3270         /*
3271          * The XDR encode routine has set things up so that
3272          * the link text will be copied directly into the
3273          * buffer.  We just have to do overflow-checking,
3274          * and and null-terminate the text (the VFS expects
3275          * null-termination).
3276          */
3277         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3278         kaddr[len+rcvbuf->page_base] = '\0';
3279         kunmap_atomic(kaddr, KM_USER0);
3280         return 0;
3281 }
3282
3283 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3284 {
3285         int status;
3286
3287         status = decode_op_hdr(xdr, OP_REMOVE);
3288         if (status)
3289                 goto out;
3290         status = decode_change_info(xdr, cinfo);
3291 out:
3292         return status;
3293 }
3294
3295 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3296               struct nfs4_change_info *new_cinfo)
3297 {
3298         int status;
3299
3300         status = decode_op_hdr(xdr, OP_RENAME);
3301         if (status)
3302                 goto out;
3303         if ((status = decode_change_info(xdr, old_cinfo)))
3304                 goto out;
3305         status = decode_change_info(xdr, new_cinfo);
3306 out:
3307         return status;
3308 }
3309
3310 static int decode_renew(struct xdr_stream *xdr)
3311 {
3312         return decode_op_hdr(xdr, OP_RENEW);
3313 }
3314
3315 static int
3316 decode_restorefh(struct xdr_stream *xdr)
3317 {
3318         return decode_op_hdr(xdr, OP_RESTOREFH);
3319 }
3320
3321 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3322                 size_t *acl_len)
3323 {
3324         uint32_t *savep;
3325         uint32_t attrlen,
3326                  bitmap[2] = {0};
3327         struct kvec *iov = req->rq_rcv_buf.head;
3328         int status;
3329
3330         *acl_len = 0;
3331         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3332                 goto out;
3333         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3334                 goto out;
3335         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3336                 goto out;
3337
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3341                 int hdrlen, recvd;
3342
3343                 /* We ignore &savep and don't do consistency checks on
3344                  * the attr length.  Let userspace figure it out.... */
3345                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3346                 recvd = req->rq_rcv_buf.len - hdrlen;
3347                 if (attrlen > recvd) {
3348                         printk(KERN_WARNING "NFS: server cheating in getattr"
3349                                         " acl reply: attrlen %u > recvd %u\n",
3350                                         attrlen, recvd);
3351                         return -EINVAL;
3352                 }
3353                 if (attrlen <= *acl_len)
3354                         xdr_read_pages(xdr, attrlen);
3355                 *acl_len = attrlen;
3356         } else
3357                 status = -EOPNOTSUPP;
3358
3359 out:
3360         return status;
3361 }
3362
3363 static int
3364 decode_savefh(struct xdr_stream *xdr)
3365 {
3366         return decode_op_hdr(xdr, OP_SAVEFH);
3367 }
3368
3369 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3370 {
3371         uint32_t *p;
3372         uint32_t bmlen;
3373         int status;
3374
3375         
3376         status = decode_op_hdr(xdr, OP_SETATTR);
3377         if (status)
3378                 return status;
3379         READ_BUF(4);
3380         READ32(bmlen);
3381         READ_BUF(bmlen << 2);
3382         return 0;
3383 }
3384
3385 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3386 {
3387         uint32_t *p;
3388         uint32_t opnum;
3389         int32_t nfserr;
3390
3391         READ_BUF(8);
3392         READ32(opnum);
3393         if (opnum != OP_SETCLIENTID) {
3394                 printk(KERN_NOTICE
3395                                 "nfs4_decode_setclientid: Server returned operation"
3396                                 " %d\n", opnum);
3397                 return -EIO;
3398         }
3399         READ32(nfserr);
3400         if (nfserr == NFS_OK) {
3401                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3402                 READ64(clp->cl_clientid);
3403                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3404         } else if (nfserr == NFSERR_CLID_INUSE) {
3405                 uint32_t len;
3406
3407                 /* skip netid string */
3408                 READ_BUF(4);
3409                 READ32(len);
3410                 READ_BUF(len);
3411
3412                 /* skip uaddr string */
3413                 READ_BUF(4);
3414                 READ32(len);
3415                 READ_BUF(len);
3416                 return -NFSERR_CLID_INUSE;
3417         } else
3418                 return -nfs_stat_to_errno(nfserr);
3419
3420         return 0;
3421 }
3422
3423 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3424 {
3425         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3426 }
3427
3428 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3429 {
3430         uint32_t *p;
3431         int status;
3432
3433         status = decode_op_hdr(xdr, OP_WRITE);
3434         if (status)
3435                 return status;
3436
3437         READ_BUF(16);
3438         READ32(res->count);
3439         READ32(res->verf->committed);
3440         COPYMEM(res->verf->verifier, 8);
3441         return 0;
3442 }
3443
3444 static int decode_delegreturn(struct xdr_stream *xdr)
3445 {
3446         return decode_op_hdr(xdr, OP_DELEGRETURN);
3447 }
3448
3449 /*
3450  * Decode OPEN_DOWNGRADE response
3451  */
3452 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3453 {
3454         struct xdr_stream xdr;
3455         struct compound_hdr hdr;
3456         int status;
3457
3458         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3459         status = decode_compound_hdr(&xdr, &hdr);
3460         if (status)
3461                 goto out;
3462         status = decode_putfh(&xdr);
3463         if (status)
3464                 goto out;
3465         status = decode_open_downgrade(&xdr, res);