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NFS: Fix some 'sparse' warnings...
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
CommitLineData
1da177e4
LT		 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>
4ce79717 54#include "nfs4_fs.h"
1da177e4
LT		 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
0a8ea437 61static int nfs4_stat_to_errno(int);
1da177e4
LT		 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))
96928206
BF		 86#define nfs4_fattr_bitmap_maxsz 3
87#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
1da177e4
LT		 88#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
89#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
96928206
BF		 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)
1da177e4
LT		 96#define encode_savefh_maxsz (op_encode_hdr_maxsz)
97#define decode_savefh_maxsz (op_decode_hdr_maxsz)
56ae19f3
TM		 98#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
99#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
1da177e4
LT		 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 + \
94a6d753 131 1 + \
96928206 132 nfs4_fattr_maxsz)
1da177e4
LT		 133#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
134#define encode_create_maxsz (op_encode_hdr_maxsz + \
135 2 + nfs4_name_maxsz + \
96928206 136 nfs4_fattr_maxsz)
1da177e4
LT		 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 + \
4f9838c7
TM		 162 op_encode_hdr_maxsz + 8 + \
163 encode_getattr_maxsz)
1da177e4
LT		 164#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
165 decode_putfh_maxsz + \
4f9838c7
TM		 166 op_decode_hdr_maxsz + 4 + \
167 decode_getattr_maxsz)
1da177e4
LT		 168#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
169 encode_putfh_maxsz + \
4f9838c7
TM		 170 op_encode_hdr_maxsz + 3 + \
171 encode_getattr_maxsz)
1da177e4
LT		 172#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
173 decode_putfh_maxsz + \
4f9838c7
TM		 174 op_decode_hdr_maxsz + 2 + \
175 decode_getattr_maxsz)
1da177e4
LT		 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 + \
516a6af6
TM		 205 op_encode_hdr_maxsz + 7 + \
206 encode_getattr_maxsz)
1da177e4
LT		 207#define NFS4_dec_open_downgrade_sz \
208 (compound_decode_hdr_maxsz + \
209 decode_putfh_maxsz + \
516a6af6
TM		 210 op_decode_hdr_maxsz + 4 + \
211 decode_getattr_maxsz)
1da177e4
LT		 212#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
213 encode_putfh_maxsz + \
516a6af6
TM		 214 op_encode_hdr_maxsz + 5 + \
215 encode_getattr_maxsz)
1da177e4
LT		 216#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
217 decode_putfh_maxsz + \
516a6af6
TM		 218 op_decode_hdr_maxsz + 4 + \
219 decode_getattr_maxsz)
1da177e4
LT		 220#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
221 encode_putfh_maxsz + \
222 op_encode_hdr_maxsz + 4 + \
96928206 223 nfs4_fattr_maxsz + \
1da177e4
LT		 224 encode_getattr_maxsz)
225#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
226 decode_putfh_maxsz + \
6ce7dc94
CL		 227 op_decode_hdr_maxsz + 3 + \
228 nfs4_fattr_maxsz)
1da177e4
LT		 229#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
230 encode_putfh_maxsz + \
231 encode_fsinfo_maxsz)
232#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
233 decode_putfh_maxsz + \
234 decode_fsinfo_maxsz)
235#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
236 encode_renew_maxsz)
237#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
238 decode_renew_maxsz)
239#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
240 encode_setclientid_maxsz)
241#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
242 decode_setclientid_maxsz)
243#define NFS4_enc_setclientid_confirm_sz \
244 (compound_encode_hdr_maxsz + \
245 encode_setclientid_confirm_maxsz + \
246 encode_putrootfh_maxsz + \
247 encode_fsinfo_maxsz)
248#define NFS4_dec_setclientid_confirm_sz \
249 (compound_decode_hdr_maxsz + \
250 decode_setclientid_confirm_maxsz + \
251 decode_putrootfh_maxsz + \
252 decode_fsinfo_maxsz)
253#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
254 encode_putfh_maxsz + \
255 encode_getattr_maxsz + \
256 op_encode_hdr_maxsz + \
257 1 + 1 + 2 + 2 + \
258 1 + 4 + 1 + 2 + \
259 owner_id_maxsz)
260#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
261 decode_putfh_maxsz + \
262 decode_getattr_maxsz + \
263 op_decode_hdr_maxsz + \
264 2 + 2 + 1 + 2 + \
265 owner_id_maxsz)
266#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
267 encode_putfh_maxsz + \
268 encode_getattr_maxsz + \
269 op_encode_hdr_maxsz + \
270 1 + 2 + 2 + 2 + \
271 owner_id_maxsz)
272#define NFS4_dec_lockt_sz (NFS4_dec_lock_sz)
273#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
274 encode_putfh_maxsz + \
275 encode_getattr_maxsz + \
276 op_encode_hdr_maxsz + \
277 1 + 1 + 4 + 2 + 2)
278#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
279 decode_putfh_maxsz + \
280 decode_getattr_maxsz + \
281 op_decode_hdr_maxsz + 4)
282#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
283 encode_putfh_maxsz + \
284 op_encode_hdr_maxsz + 1)
285#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
286 decode_putfh_maxsz + \
287 op_decode_hdr_maxsz + 2)
288#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
289 encode_putfh_maxsz + \
290 encode_getattr_maxsz)
291#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
292 decode_putfh_maxsz + \
293 decode_getattr_maxsz)
294#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
295 encode_putfh_maxsz + \
296 encode_lookup_maxsz + \
297 encode_getattr_maxsz + \
298 encode_getfh_maxsz)
299#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
300 decode_putfh_maxsz + \
301 op_decode_hdr_maxsz + \
302 decode_getattr_maxsz + \
303 decode_getfh_maxsz)
304#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
305 encode_putrootfh_maxsz + \
306 encode_getattr_maxsz + \
307 encode_getfh_maxsz)
308#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
309 decode_putrootfh_maxsz + \
310 decode_getattr_maxsz + \
311 decode_getfh_maxsz)
312#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
313 encode_putfh_maxsz + \
16e42959
TM		 314 encode_remove_maxsz + \
315 encode_getattr_maxsz)
1da177e4
LT		 316#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
317 decode_putfh_maxsz + \
16e42959
TM		 318 op_decode_hdr_maxsz + 5 + \
319 decode_getattr_maxsz)
1da177e4
LT		 320#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
321 encode_putfh_maxsz + \
322 encode_savefh_maxsz + \
323 encode_putfh_maxsz + \
6caf2c82
TM		 324 encode_rename_maxsz + \
325 encode_getattr_maxsz + \
326 encode_restorefh_maxsz + \
327 encode_getattr_maxsz)
1da177e4
LT		 328#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
329 decode_putfh_maxsz + \
330 decode_savefh_maxsz + \
331 decode_putfh_maxsz + \
6caf2c82
TM		 332 decode_rename_maxsz + \
333 decode_getattr_maxsz + \
334 decode_restorefh_maxsz + \
335 decode_getattr_maxsz)
1da177e4
LT		 336#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
337 encode_putfh_maxsz + \
338 encode_savefh_maxsz + \
339 encode_putfh_maxsz + \
91ba2eee
TM		 340 encode_link_maxsz + \
341 decode_getattr_maxsz + \
342 encode_restorefh_maxsz + \
343 decode_getattr_maxsz)
1da177e4
LT		 344#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
345 decode_putfh_maxsz + \
346 decode_savefh_maxsz + \
347 decode_putfh_maxsz + \
91ba2eee
TM		 348 decode_link_maxsz + \
349 decode_getattr_maxsz + \
350 decode_restorefh_maxsz + \
351 decode_getattr_maxsz)
1da177e4
LT		 352#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
353 encode_putfh_maxsz + \
354 encode_symlink_maxsz + \
355 encode_getattr_maxsz + \
356 encode_getfh_maxsz)
357#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
358 decode_putfh_maxsz + \
359 decode_symlink_maxsz + \
360 decode_getattr_maxsz + \
361 decode_getfh_maxsz)
362#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
363 encode_putfh_maxsz + \
56ae19f3 364 encode_savefh_maxsz + \
1da177e4 365 encode_create_maxsz + \
56ae19f3 366 encode_getfh_maxsz + \
1da177e4 367 encode_getattr_maxsz + \
56ae19f3
TM		 368 encode_restorefh_maxsz + \
369 encode_getattr_maxsz)
1da177e4
LT		 370#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
371 decode_putfh_maxsz + \
56ae19f3 372 decode_savefh_maxsz + \
1da177e4 373 decode_create_maxsz + \
56ae19f3 374 decode_getfh_maxsz + \
1da177e4 375 decode_getattr_maxsz + \
56ae19f3
TM		 376 decode_restorefh_maxsz + \
377 decode_getattr_maxsz)
1da177e4
LT		 378#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
379 encode_putfh_maxsz + \
380 encode_getattr_maxsz)
381#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
382 decode_putfh_maxsz + \
383 decode_getattr_maxsz)
384#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
385 encode_putfh_maxsz + \
386 encode_getattr_maxsz)
387#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
388 decode_putfh_maxsz + \
389 op_decode_hdr_maxsz + 12)
390#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
ab91f264 391 encode_putfh_maxsz + \
1da177e4
LT		 392 encode_getattr_maxsz)
393#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
ab91f264 394 decode_putfh_maxsz + \
1da177e4
LT		 395 decode_getattr_maxsz)
396#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
397 encode_putfh_maxsz + \
fa178f29
TM		 398 encode_delegreturn_maxsz + \
399 encode_getattr_maxsz)
1da177e4 400#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
fa178f29
TM		 401 decode_delegreturn_maxsz + \
402 decode_getattr_maxsz)
029d105e
BF		 403#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
404 encode_putfh_maxsz + \
405 encode_getattr_maxsz)
406#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
407 decode_putfh_maxsz + \
408 op_decode_hdr_maxsz + \
409 nfs4_fattr_bitmap_maxsz + 1)
23ec6965
BF		 410#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
411 encode_putfh_maxsz + \
412 op_encode_hdr_maxsz + 4 + \
413 nfs4_fattr_bitmap_maxsz + 1)
414#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
415 decode_putfh_maxsz + \
416 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
683b57b4
TM		 417#define NFS4_enc_fs_locations_sz \
418 (compound_encode_hdr_maxsz + \
419 encode_putfh_maxsz + \
420 encode_getattr_maxsz)
421#define NFS4_dec_fs_locations_sz \
422 (compound_decode_hdr_maxsz + \
423 decode_putfh_maxsz + \
424 op_decode_hdr_maxsz + \
425 nfs4_fattr_bitmap_maxsz)
1da177e4
LT		 426
427static struct {
428 unsigned int mode;
429 unsigned int nfs2type;
430} nfs_type2fmt[] = {
431 { 0, NFNON },
432 { S_IFREG, NFREG },
433 { S_IFDIR, NFDIR },
434 { S_IFBLK, NFBLK },
435 { S_IFCHR, NFCHR },
436 { S_IFLNK, NFLNK },
437 { S_IFSOCK, NFSOCK },
438 { S_IFIFO, NFFIFO },
439 { 0, NFNON },
440 { 0, NFNON },
441};
442
443struct compound_hdr {
444 int32_t status;
445 uint32_t nops;
446 uint32_t taglen;
447 char * tag;
448};
449
450/*
451 * START OF "GENERIC" ENCODE ROUTINES.
452 * These may look a little ugly since they are imported from a "generic"
453 * set of XDR encode/decode routines which are intended to be shared by
454 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
455 *
456 * If the pain of reading these is too great, it should be a straightforward
457 * task to translate them into Linux-specific versions which are more
458 * consistent with the style used in NFSv2/v3...
459 */
460#define WRITE32(n) *p++ = htonl(n)
461#define WRITE64(n) do { \
462 *p++ = htonl((uint32_t)((n) >> 32)); \
463 *p++ = htonl((uint32_t)(n)); \
464} while (0)
465#define WRITEMEM(ptr,nbytes) do { \
466 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
467} while (0)
468
469#define RESERVE_SPACE(nbytes) do { \
470 p = xdr_reserve_space(xdr, nbytes); \
471 if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
472 BUG_ON(!p); \
473} while (0)
474
475static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
476{
8687b63a 477 __be32 *p;
1da177e4
LT		 478
479 p = xdr_reserve_space(xdr, 4 + len);
480 BUG_ON(p == NULL);
481 xdr_encode_opaque(p, str, len);
482}
483
484static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
485{
8687b63a 486 __be32 *p;
1da177e4
LT		 487
488 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
489 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
490 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
491 WRITE32(hdr->taglen);
492 WRITEMEM(hdr->tag, hdr->taglen);
493 WRITE32(NFS4_MINOR_VERSION);
494 WRITE32(hdr->nops);
495 return 0;
496}
497
498static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
499{
8687b63a 500 __be32 *p;
1da177e4
LT		 501
502 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
503 BUG_ON(p == NULL);
504 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
505}
506
507static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
508{
509 char owner_name[IDMAP_NAMESZ];
510 char owner_group[IDMAP_NAMESZ];
511 int owner_namelen = 0;
512 int owner_grouplen = 0;
8687b63a
AV		 513 __be32 *p;
514 __be32 *q;
1da177e4
LT		 515 int len;
516 uint32_t bmval0 = 0;
517 uint32_t bmval1 = 0;
518 int status;
519
520 /*
521 * We reserve enough space to write the entire attribute buffer at once.
522 * In the worst-case, this would be
523 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
524 * = 36 bytes, plus any contribution from variable-length fields
23ec6965 525 * such as owner/group.
1da177e4
LT		 526 */
527 len = 16;
528
529 /* Sigh */
530 if (iap->ia_valid & ATTR_SIZE)
531 len += 8;
532 if (iap->ia_valid & ATTR_MODE)
533 len += 4;
534 if (iap->ia_valid & ATTR_UID) {
7539bbab 535 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
1da177e4
LT		 536 if (owner_namelen < 0) {
537 printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
538 iap->ia_uid);
539 /* XXX */
540 strcpy(owner_name, "nobody");
541 owner_namelen = sizeof("nobody") - 1;
542 /* goto out; */
543 }
544 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
545 }
546 if (iap->ia_valid & ATTR_GID) {
7539bbab 547 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
1da177e4
LT		 548 if (owner_grouplen < 0) {
549 printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
550 iap->ia_gid);
551 strcpy(owner_group, "nobody");
552 owner_grouplen = sizeof("nobody") - 1;
553 /* goto out; */
554 }
555 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
556 }
557 if (iap->ia_valid & ATTR_ATIME_SET)
558 len += 16;
559 else if (iap->ia_valid & ATTR_ATIME)
560 len += 4;
561 if (iap->ia_valid & ATTR_MTIME_SET)
562 len += 16;
563 else if (iap->ia_valid & ATTR_MTIME)
564 len += 4;
565 RESERVE_SPACE(len);
566
567 /*
568 * We write the bitmap length now, but leave the bitmap and the attribute
569 * buffer length to be backfilled at the end of this routine.
570 */
571 WRITE32(2);
572 q = p;
573 p += 3;
574
575 if (iap->ia_valid & ATTR_SIZE) {
576 bmval0 |= FATTR4_WORD0_SIZE;
577 WRITE64(iap->ia_size);
578 }
579 if (iap->ia_valid & ATTR_MODE) {
580 bmval1 |= FATTR4_WORD1_MODE;
cf3fff54 581 WRITE32(iap->ia_mode & S_IALLUGO);
1da177e4
LT		 582 }
583 if (iap->ia_valid & ATTR_UID) {
584 bmval1 |= FATTR4_WORD1_OWNER;
585 WRITE32(owner_namelen);
586 WRITEMEM(owner_name, owner_namelen);
587 }
588 if (iap->ia_valid & ATTR_GID) {
589 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
590 WRITE32(owner_grouplen);
591 WRITEMEM(owner_group, owner_grouplen);
592 }
593 if (iap->ia_valid & ATTR_ATIME_SET) {
594 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
595 WRITE32(NFS4_SET_TO_CLIENT_TIME);
596 WRITE32(0);
597 WRITE32(iap->ia_mtime.tv_sec);
598 WRITE32(iap->ia_mtime.tv_nsec);
599 }
600 else if (iap->ia_valid & ATTR_ATIME) {
601 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
602 WRITE32(NFS4_SET_TO_SERVER_TIME);
603 }
604 if (iap->ia_valid & ATTR_MTIME_SET) {
605 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
606 WRITE32(NFS4_SET_TO_CLIENT_TIME);
607 WRITE32(0);
608 WRITE32(iap->ia_mtime.tv_sec);
609 WRITE32(iap->ia_mtime.tv_nsec);
610 }
611 else if (iap->ia_valid & ATTR_MTIME) {
612 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
613 WRITE32(NFS4_SET_TO_SERVER_TIME);
614 }
615
616 /*
617 * Now we backfill the bitmap and the attribute buffer length.
618 */
619 if (len != ((char *)p - (char *)q) + 4) {
620 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
621 len, ((char *)p - (char *)q) + 4);
622 BUG();
623 }
624 len = (char *)p - (char *)q - 12;
625 *q++ = htonl(bmval0);
626 *q++ = htonl(bmval1);
627 *q++ = htonl(len);
628
629 status = 0;
630/* out: */
631 return status;
632}
633
634static int encode_access(struct xdr_stream *xdr, u32 access)
635{
8687b63a 636 __be32 *p;
1da177e4
LT		 637
638 RESERVE_SPACE(8);
639 WRITE32(OP_ACCESS);
640 WRITE32(access);
641
642 return 0;
643}
644
645static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
646{
8687b63a 647 __be32 *p;
1da177e4 648
8ae20abd 649 RESERVE_SPACE(8+NFS4_STATEID_SIZE);
1da177e4 650 WRITE32(OP_CLOSE);
cee54fc9 651 WRITE32(arg->seqid->sequence->counter);
8ae20abd 652 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1da177e4
LT		 653
654 return 0;
655}
656
657static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
658{
8687b63a 659 __be32 *p;
1da177e4
LT		 660
661 RESERVE_SPACE(16);
662 WRITE32(OP_COMMIT);
663 WRITE64(args->offset);
664 WRITE32(args->count);
665
666 return 0;
667}
668
669static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
670{
8687b63a 671 __be32 *p;
1da177e4
LT		 672
673 RESERVE_SPACE(8);
674 WRITE32(OP_CREATE);
675 WRITE32(create->ftype);
676
677 switch (create->ftype) {
678 case NF4LNK:
94a6d753
CL		 679 RESERVE_SPACE(4);
680 WRITE32(create->u.symlink.len);
681 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1da177e4
LT		 682 break;
683
684 case NF4BLK: case NF4CHR:
685 RESERVE_SPACE(8);
686 WRITE32(create->u.device.specdata1);
687 WRITE32(create->u.device.specdata2);
688 break;
689
690 default:
691 break;
692 }
693
694 RESERVE_SPACE(4 + create->name->len);
695 WRITE32(create->name->len);
696 WRITEMEM(create->name->name, create->name->len);
697
698 return encode_attrs(xdr, create->attrs, create->server);
699}
700
701static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
702{
8687b63a 703 __be32 *p;
1da177e4
LT		 704
705 RESERVE_SPACE(12);
706 WRITE32(OP_GETATTR);
707 WRITE32(1);
708 WRITE32(bitmap);
709 return 0;
710}
711
712static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
713{
8687b63a 714 __be32 *p;
1da177e4
LT		 715
716 RESERVE_SPACE(16);
717 WRITE32(OP_GETATTR);
718 WRITE32(2);
719 WRITE32(bm0);
720 WRITE32(bm1);
721 return 0;
722}
723
724static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
725{
1da177e4
LT		 726 return encode_getattr_two(xdr,
727 bitmask[0] & nfs4_fattr_bitmap[0],
728 bitmask[1] & nfs4_fattr_bitmap[1]);
729}
730
731static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
732{
1da177e4
LT		 733 return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
734 bitmask[1] & nfs4_fsinfo_bitmap[1]);
735}
736
830b8e33
MN		 737static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
738{
739 return encode_getattr_two(xdr,
740 bitmask[0] & nfs4_fs_locations_bitmap[0],
741 bitmask[1] & nfs4_fs_locations_bitmap[1]);
742}
743
1da177e4
LT		 744static int encode_getfh(struct xdr_stream *xdr)
745{
8687b63a 746 __be32 *p;
1da177e4
LT		 747
748 RESERVE_SPACE(4);
749 WRITE32(OP_GETFH);
750
751 return 0;
752}
753
754static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
755{
8687b63a 756 __be32 *p;
1da177e4
LT		 757
758 RESERVE_SPACE(8 + name->len);
759 WRITE32(OP_LINK);
760 WRITE32(name->len);
761 WRITEMEM(name->name, name->len);
762
763 return 0;
764}
765
911d1aaf
TM		 766static inline int nfs4_lock_type(struct file_lock *fl, int block)
767{
768 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
769 return block ? NFS4_READW_LT : NFS4_READ_LT;
770 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
771}
772
773static inline uint64_t nfs4_lock_length(struct file_lock *fl)
774{
775 if (fl->fl_end == OFFSET_MAX)
776 return ~(uint64_t)0;
777 return fl->fl_end - fl->fl_start + 1;
778}
779
1da177e4
LT		 780/*
781 * opcode,type,reclaim,offset,length,new_lock_owner = 32
782 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
783 */
911d1aaf 784static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
1da177e4 785{
8687b63a 786 __be32 *p;
1da177e4
LT		 787
788 RESERVE_SPACE(32);
789 WRITE32(OP_LOCK);
911d1aaf
TM		 790 WRITE32(nfs4_lock_type(args->fl, args->block));
791 WRITE32(args->reclaim);
792 WRITE64(args->fl->fl_start);
793 WRITE64(nfs4_lock_length(args->fl));
794 WRITE32(args->new_lock_owner);
795 if (args->new_lock_owner){
8ae20abd 796 RESERVE_SPACE(4+NFS4_STATEID_SIZE+20);
911d1aaf 797 WRITE32(args->open_seqid->sequence->counter);
8ae20abd 798 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
911d1aaf
TM		 799 WRITE32(args->lock_seqid->sequence->counter);
800 WRITE64(args->lock_owner.clientid);
1da177e4 801 WRITE32(4);
911d1aaf 802 WRITE32(args->lock_owner.id);
1da177e4
LT		 803 }
804 else {
8ae20abd
TM		 805 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
806 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
911d1aaf 807 WRITE32(args->lock_seqid->sequence->counter);
1da177e4
LT		 808 }
809
810 return 0;
811}
812
911d1aaf 813static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
1da177e4 814{
8687b63a 815 __be32 *p;
1da177e4
LT		 816
817 RESERVE_SPACE(40);
818 WRITE32(OP_LOCKT);
911d1aaf
TM		 819 WRITE32(nfs4_lock_type(args->fl, 0));
820 WRITE64(args->fl->fl_start);
821 WRITE64(nfs4_lock_length(args->fl));
822 WRITE64(args->lock_owner.clientid);
1da177e4 823 WRITE32(4);
911d1aaf 824 WRITE32(args->lock_owner.id);
1da177e4
LT		 825
826 return 0;
827}
828
911d1aaf 829static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
1da177e4 830{
8687b63a 831 __be32 *p;
1da177e4 832
8ae20abd 833 RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1da177e4 834 WRITE32(OP_LOCKU);
911d1aaf
TM		 835 WRITE32(nfs4_lock_type(args->fl, 0));
836 WRITE32(args->seqid->sequence->counter);
8ae20abd 837 WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
911d1aaf
TM		 838 WRITE64(args->fl->fl_start);
839 WRITE64(nfs4_lock_length(args->fl));
1da177e4
LT		 840
841 return 0;
842}
843
844static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
845{
846 int len = name->len;
8687b63a 847 __be32 *p;
1da177e4
LT		 848
849 RESERVE_SPACE(8 + len);
850 WRITE32(OP_LOOKUP);
851 WRITE32(len);
852 WRITEMEM(name->name, len);
853
854 return 0;
855}
856
857static void encode_share_access(struct xdr_stream *xdr, int open_flags)
858{
8687b63a 859 __be32 *p;
1da177e4
LT		 860
861 RESERVE_SPACE(8);
862 switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
863 case FMODE_READ:
864 WRITE32(NFS4_SHARE_ACCESS_READ);
865 break;
866 case FMODE_WRITE:
867 WRITE32(NFS4_SHARE_ACCESS_WRITE);
868 break;
869 case FMODE_READ|FMODE_WRITE:
870 WRITE32(NFS4_SHARE_ACCESS_BOTH);
871 break;
872 default:
873 BUG();
874 }
875 WRITE32(0); /* for linux, share_deny = 0 always */
876}
877
878static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
879{
8687b63a 880 __be32 *p;
1da177e4
LT		 881 /*
882 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
883 * owner 4 = 32
884 */
885 RESERVE_SPACE(8);
886 WRITE32(OP_OPEN);
cee54fc9 887 WRITE32(arg->seqid->sequence->counter);
1da177e4
LT		 888 encode_share_access(xdr, arg->open_flags);
889 RESERVE_SPACE(16);
890 WRITE64(arg->clientid);
891 WRITE32(4);
892 WRITE32(arg->id);
893}
894
895static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
896{
8687b63a 897 __be32 *p;
1da177e4
LT		 898
899 RESERVE_SPACE(4);
900 switch(arg->open_flags & O_EXCL) {
901 case 0:
902 WRITE32(NFS4_CREATE_UNCHECKED);
903 encode_attrs(xdr, arg->u.attrs, arg->server);
904 break;
905 default:
906 WRITE32(NFS4_CREATE_EXCLUSIVE);
907 encode_nfs4_verifier(xdr, &arg->u.verifier);
908 }
909}
910
911static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
912{
8687b63a 913 __be32 *p;
1da177e4
LT		 914
915 RESERVE_SPACE(4);
916 switch (arg->open_flags & O_CREAT) {
917 case 0:
918 WRITE32(NFS4_OPEN_NOCREATE);
919 break;
920 default:
921 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
922 WRITE32(NFS4_OPEN_CREATE);
923 encode_createmode(xdr, arg);
924 }
925}
926
927static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
928{
8687b63a 929 __be32 *p;
1da177e4
LT		 930
931 RESERVE_SPACE(4);
932 switch (delegation_type) {
933 case 0:
934 WRITE32(NFS4_OPEN_DELEGATE_NONE);
935 break;
936 case FMODE_READ:
937 WRITE32(NFS4_OPEN_DELEGATE_READ);
938 break;
939 case FMODE_WRITE|FMODE_READ:
940 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
941 break;
942 default:
943 BUG();
944 }
945}
946
947static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
948{
8687b63a 949 __be32 *p;
1da177e4
LT		 950
951 RESERVE_SPACE(4);
952 WRITE32(NFS4_OPEN_CLAIM_NULL);
953 encode_string(xdr, name->len, name->name);
954}
955
956static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
957{
8687b63a 958 __be32 *p;
1da177e4
LT		 959
960 RESERVE_SPACE(4);
961 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
962 encode_delegation_type(xdr, type);
963}
964
965static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
966{
8687b63a 967 __be32 *p;
1da177e4 968
8ae20abd 969 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1da177e4 970 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
8ae20abd 971 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1da177e4
LT		 972 encode_string(xdr, name->len, name->name);
973}
974
975static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
976{
977 encode_openhdr(xdr, arg);
978 encode_opentype(xdr, arg);
979 switch (arg->claim) {
980 case NFS4_OPEN_CLAIM_NULL:
981 encode_claim_null(xdr, arg->name);
982 break;
983 case NFS4_OPEN_CLAIM_PREVIOUS:
984 encode_claim_previous(xdr, arg->u.delegation_type);
985 break;
986 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
987 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
988 break;
989 default:
990 BUG();
991 }
992 return 0;
993}
994
995static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
996{
8687b63a 997 __be32 *p;
1da177e4 998
8ae20abd 999 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1da177e4 1000 WRITE32(OP_OPEN_CONFIRM);
8ae20abd 1001 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
cee54fc9 1002 WRITE32(arg->seqid->sequence->counter);
1da177e4
LT		 1003
1004 return 0;
1005}
1006
1007static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1008{
8687b63a 1009 __be32 *p;
1da177e4 1010
8ae20abd 1011 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1da177e4 1012 WRITE32(OP_OPEN_DOWNGRADE);
8ae20abd 1013 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
cee54fc9 1014 WRITE32(arg->seqid->sequence->counter);
1da177e4
LT		 1015 encode_share_access(xdr, arg->open_flags);
1016 return 0;
1017}
1018
1019static int
1020encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1021{
1022 int len = fh->size;
8687b63a 1023 __be32 *p;
1da177e4
LT		 1024
1025 RESERVE_SPACE(8 + len);
1026 WRITE32(OP_PUTFH);
1027 WRITE32(len);
1028 WRITEMEM(fh->data, len);
1029
1030 return 0;
1031}
1032
1033static int encode_putrootfh(struct xdr_stream *xdr)
1034{
8687b63a 1035 __be32 *p;
1da177e4
LT		 1036
1037 RESERVE_SPACE(4);
1038 WRITE32(OP_PUTROOTFH);
1039
1040 return 0;
1041}
1042
1043static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1044{
1da177e4 1045 nfs4_stateid stateid;
8687b63a 1046 __be32 *p;
1da177e4 1047
8ae20abd 1048 RESERVE_SPACE(NFS4_STATEID_SIZE);
1da177e4
LT		 1049 if (ctx->state != NULL) {
1050 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
8ae20abd 1051 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1da177e4 1052 } else
8ae20abd 1053 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 1054}
1055
1056static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1057{
8687b63a 1058 __be32 *p;
1da177e4
LT		 1059
1060 RESERVE_SPACE(4);
1061 WRITE32(OP_READ);
1062
1063 encode_stateid(xdr, args->context);
1064
1065 RESERVE_SPACE(12);
1066 WRITE64(args->offset);
1067 WRITE32(args->count);
1068
1069 return 0;
1070}
1071
1072static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1073{
1074 struct rpc_auth *auth = req->rq_task->tk_auth;
97d312d0
MN		 1075 uint32_t attrs[2] = {
1076 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1077 FATTR4_WORD1_MOUNTED_ON_FILEID,
1078 };
1da177e4 1079 int replen;
8687b63a 1080 __be32 *p;
1da177e4 1081
8ae20abd 1082 RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1da177e4
LT		 1083 WRITE32(OP_READDIR);
1084 WRITE64(readdir->cookie);
8ae20abd 1085 WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1086 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1087 WRITE32(readdir->count);
1088 WRITE32(2);
97d312d0
MN		 1089 /* Switch to mounted_on_fileid if the server supports it */
1090 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1091 attrs[0] &= ~FATTR4_WORD0_FILEID;
1092 else
1093 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1094 WRITE32(attrs[0] & readdir->bitmask[0]);
1095 WRITE32(attrs[1] & readdir->bitmask[1]);
eadf4598
TM		 1096 dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1097 __FUNCTION__,
1098 (unsigned long long)readdir->cookie,
1099 ((u32 *)readdir->verifier.data)[0],
1100 ((u32 *)readdir->verifier.data)[1],
1101 attrs[0] & readdir->bitmask[0],
1102 attrs[1] & readdir->bitmask[1]);
1da177e4
LT		 1103
1104 /* set up reply kvec
1105 * toplevel_status + taglen + rescount + OP_PUTFH + status
1106 * + OP_READDIR + status + verifer(2) = 9
1107 */
1108 replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1109 xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1110 readdir->pgbase, readdir->count);
eadf4598
TM		 1111 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1112 __FUNCTION__, replen, readdir->pages,
1113 readdir->pgbase, readdir->count);
1da177e4
LT		 1114
1115 return 0;
1116}
1117
1118static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1119{
1120 struct rpc_auth *auth = req->rq_task->tk_auth;
1121 unsigned int replen;
8687b63a 1122 __be32 *p;
1da177e4
LT		 1123
1124 RESERVE_SPACE(4);
1125 WRITE32(OP_READLINK);
1126
1127 /* set up reply kvec
1128 * toplevel_status + taglen + rescount + OP_PUTFH + status
1129 * + OP_READLINK + status + string length = 8
1130 */
1131 replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1132 xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1133 readlink->pgbase, readlink->pglen);
1134
1135 return 0;
1136}
1137
1138static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1139{
8687b63a 1140 __be32 *p;
1da177e4
LT		 1141
1142 RESERVE_SPACE(8 + name->len);
1143 WRITE32(OP_REMOVE);
1144 WRITE32(name->len);
1145 WRITEMEM(name->name, name->len);
1146
1147 return 0;
1148}
1149
1150static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1151{
8687b63a 1152 __be32 *p;
1da177e4
LT		 1153
1154 RESERVE_SPACE(8 + oldname->len);
1155 WRITE32(OP_RENAME);
1156 WRITE32(oldname->len);
1157 WRITEMEM(oldname->name, oldname->len);
1158
1159 RESERVE_SPACE(4 + newname->len);
1160 WRITE32(newname->len);
1161 WRITEMEM(newname->name, newname->len);
1162
1163 return 0;
1164}
1165
adfa6f98 1166static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1da177e4 1167{
8687b63a 1168 __be32 *p;
1da177e4
LT		 1169
1170 RESERVE_SPACE(12);
1171 WRITE32(OP_RENEW);
1172 WRITE64(client_stateid->cl_clientid);
1173
1174 return 0;
1175}
1176
56ae19f3
TM		 1177static int
1178encode_restorefh(struct xdr_stream *xdr)
1179{
8687b63a 1180 __be32 *p;
56ae19f3
TM		 1181
1182 RESERVE_SPACE(4);
1183 WRITE32(OP_RESTOREFH);
1184
1185 return 0;
1186}
1187
23ec6965
BF		 1188static int
1189encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1190{
8687b63a 1191 __be32 *p;
23ec6965 1192
8ae20abd 1193 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
23ec6965 1194 WRITE32(OP_SETATTR);
8ae20abd 1195 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
23ec6965
BF		 1196 RESERVE_SPACE(2*4);
1197 WRITE32(1);
1198 WRITE32(FATTR4_WORD0_ACL);
1199 if (arg->acl_len % 4)
1200 return -EINVAL;
1201 RESERVE_SPACE(4);
1202 WRITE32(arg->acl_len);
1203 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1204 return 0;
1205}
1206
1da177e4
LT		 1207static int
1208encode_savefh(struct xdr_stream *xdr)
1209{
8687b63a 1210 __be32 *p;
1da177e4
LT		 1211
1212 RESERVE_SPACE(4);
1213 WRITE32(OP_SAVEFH);
1214
1215 return 0;
1216}
1217
1218static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1219{
1220 int status;
8687b63a 1221 __be32 *p;
1da177e4 1222
8ae20abd 1223 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1da177e4 1224 WRITE32(OP_SETATTR);
8ae20abd 1225 WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 1226
1227 if ((status = encode_attrs(xdr, arg->iap, server)))
1228 return status;
1229
1230 return 0;
1231}
1232
1233static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1234{
8687b63a 1235 __be32 *p;
1da177e4 1236
8ae20abd 1237 RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1da177e4 1238 WRITE32(OP_SETCLIENTID);
8ae20abd 1239 WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1240
1241 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1242 RESERVE_SPACE(4);
1243 WRITE32(setclientid->sc_prog);
1244 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1245 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1246 RESERVE_SPACE(4);
1247 WRITE32(setclientid->sc_cb_ident);
1248
1249 return 0;
1250}
1251
adfa6f98 1252static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1da177e4 1253{
8687b63a 1254 __be32 *p;
1da177e4 1255
8ae20abd 1256 RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1da177e4
LT		 1257 WRITE32(OP_SETCLIENTID_CONFIRM);
1258 WRITE64(client_state->cl_clientid);
8ae20abd 1259 WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1260
1261 return 0;
1262}
1263
1264static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1265{
8687b63a 1266 __be32 *p;
1da177e4
LT		 1267
1268 RESERVE_SPACE(4);
1269 WRITE32(OP_WRITE);
1270
1271 encode_stateid(xdr, args->context);
1272
1273 RESERVE_SPACE(16);
1274 WRITE64(args->offset);
1275 WRITE32(args->stable);
1276 WRITE32(args->count);
1277
1278 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1279
1280 return 0;
1281}
1282
1283static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1284{
8687b63a 1285 __be32 *p;
1da177e4 1286
8ae20abd 1287 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1da177e4
LT		 1288
1289 WRITE32(OP_DELEGRETURN);
8ae20abd 1290 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1da177e4
LT		 1291 return 0;
1292
1293}
1294/*
1295 * END OF "GENERIC" ENCODE ROUTINES.
1296 */
1297
1298/*
1299 * Encode an ACCESS request
1300 */
8687b63a 1301static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1da177e4
LT		 1302{
1303 struct xdr_stream xdr;
1304 struct compound_hdr hdr = {
1305 .nops = 2,
1306 };
1307 int status;
1308
1309 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1310 encode_compound_hdr(&xdr, &hdr);
1311 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1312 status = encode_access(&xdr, args->access);
1313 return status;
1314}
1315
1316/*
1317 * Encode LOOKUP request
1318 */
8687b63a 1319static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1da177e4
LT		 1320{
1321 struct xdr_stream xdr;
1322 struct compound_hdr hdr = {
1323 .nops = 4,
1324 };
1325 int status;
1326
1327 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1328 encode_compound_hdr(&xdr, &hdr);
1329 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1330 goto out;
1331 if ((status = encode_lookup(&xdr, args->name)) != 0)
1332 goto out;
1333 if ((status = encode_getfh(&xdr)) != 0)
1334 goto out;
1335 status = encode_getfattr(&xdr, args->bitmask);
1336out:
1337 return status;
1338}
1339
1340/*
1341 * Encode LOOKUP_ROOT request
1342 */
8687b63a 1343static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1da177e4
LT		 1344{
1345 struct xdr_stream xdr;
1346 struct compound_hdr hdr = {
1347 .nops = 3,
1348 };
1349 int status;
1350
1351 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1352 encode_compound_hdr(&xdr, &hdr);
1353 if ((status = encode_putrootfh(&xdr)) != 0)
1354 goto out;
1355 if ((status = encode_getfh(&xdr)) == 0)
1356 status = encode_getfattr(&xdr, args->bitmask);
1357out:
1358 return status;
1359}
1360
1361/*
1362 * Encode REMOVE request
1363 */
8687b63a 1364static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
1da177e4
LT		 1365{
1366 struct xdr_stream xdr;
1367 struct compound_hdr hdr = {
16e42959 1368 .nops = 3,
1da177e4
LT		 1369 };
1370 int status;
1371
1372 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1373 encode_compound_hdr(&xdr, &hdr);
16e42959
TM		 1374 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1375 goto out;
1376 if ((status = encode_remove(&xdr, args->name)) != 0)
1377 goto out;
1378 status = encode_getfattr(&xdr, args->bitmask);
1379out:
1da177e4
LT		 1380 return status;
1381}
1382
1383/*
1384 * Encode RENAME request
1385 */
8687b63a 1386static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1da177e4
LT		 1387{
1388 struct xdr_stream xdr;
1389 struct compound_hdr hdr = {
6caf2c82 1390 .nops = 7,
1da177e4
LT		 1391 };
1392 int status;
1393
1394 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1395 encode_compound_hdr(&xdr, &hdr);
1396 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1397 goto out;
1398 if ((status = encode_savefh(&xdr)) != 0)
1399 goto out;
1400 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1401 goto out;
6caf2c82
TM		 1402 if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1403 goto out;
1404 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1405 goto out;
1406 if ((status = encode_restorefh(&xdr)) != 0)
1407 goto out;
1408 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1409out:
1410 return status;
1411}
1412
1413/*
1414 * Encode LINK request
1415 */
8687b63a 1416static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1da177e4
LT		 1417{
1418 struct xdr_stream xdr;
1419 struct compound_hdr hdr = {
91ba2eee 1420 .nops = 7,
1da177e4
LT		 1421 };
1422 int status;
1423
1424 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1425 encode_compound_hdr(&xdr, &hdr);
1426 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1427 goto out;
1428 if ((status = encode_savefh(&xdr)) != 0)
1429 goto out;
1430 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1431 goto out;
91ba2eee
TM		 1432 if ((status = encode_link(&xdr, args->name)) != 0)
1433 goto out;
1434 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1435 goto out;
1436 if ((status = encode_restorefh(&xdr)) != 0)
1437 goto out;
1438 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1439out:
1440 return status;
1441}
1442
1443/*
1444 * Encode CREATE request
1445 */
8687b63a 1446static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1da177e4
LT		 1447{
1448 struct xdr_stream xdr;
1449 struct compound_hdr hdr = {
56ae19f3 1450 .nops = 7,
1da177e4
LT		 1451 };
1452 int status;
1453
1454 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1455 encode_compound_hdr(&xdr, &hdr);
1456 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1457 goto out;
56ae19f3
TM		 1458 if ((status = encode_savefh(&xdr)) != 0)
1459 goto out;
1da177e4
LT		 1460 if ((status = encode_create(&xdr, args)) != 0)
1461 goto out;
1462 if ((status = encode_getfh(&xdr)) != 0)
1463 goto out;
56ae19f3
TM		 1464 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1465 goto out;
1466 if ((status = encode_restorefh(&xdr)) != 0)
1467 goto out;
1da177e4
LT		 1468 status = encode_getfattr(&xdr, args->bitmask);
1469out:
1470 return status;
1471}
1472
1473/*
1474 * Encode SYMLINK request
1475 */
8687b63a 1476static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1da177e4
LT		 1477{
1478 return nfs4_xdr_enc_create(req, p, args);
1479}
1480
1481/*
1482 * Encode GETATTR request
1483 */
8687b63a 1484static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1da177e4
LT		 1485{
1486 struct xdr_stream xdr;
1487 struct compound_hdr hdr = {
1488 .nops = 2,
1489 };
1490 int status;
1491
1492 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1493 encode_compound_hdr(&xdr, &hdr);
1494 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1495 status = encode_getfattr(&xdr, args->bitmask);
1496 return status;
1497}
1498
1499/*
1500 * Encode a CLOSE request
1501 */
8687b63a 1502static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1da177e4
LT		 1503{
1504 struct xdr_stream xdr;
1505 struct compound_hdr hdr = {
516a6af6 1506 .nops = 3,
1da177e4
LT		 1507 };
1508 int status;
1509
1510 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1511 encode_compound_hdr(&xdr, &hdr);
1512 status = encode_putfh(&xdr, args->fh);
1513 if(status)
1514 goto out;
1515 status = encode_close(&xdr, args);
516a6af6
TM		 1516 if (status != 0)
1517 goto out;
1518 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1519out:
1520 return status;
1521}
1522
1523/*
1524 * Encode an OPEN request
1525 */
8687b63a 1526static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1da177e4
LT		 1527{
1528 struct xdr_stream xdr;
1529 struct compound_hdr hdr = {
56ae19f3 1530 .nops = 7,
1da177e4
LT		 1531 };
1532 int status;
1533
1534 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1535 encode_compound_hdr(&xdr, &hdr);
1536 status = encode_putfh(&xdr, args->fh);
56ae19f3
TM		 1537 if (status)
1538 goto out;
1539 status = encode_savefh(&xdr);
1da177e4
LT		 1540 if (status)
1541 goto out;
1542 status = encode_open(&xdr, args);
1543 if (status)
1544 goto out;
1545 status = encode_getfh(&xdr);
1546 if (status)
1547 goto out;
1548 status = encode_getfattr(&xdr, args->bitmask);
56ae19f3
TM		 1549 if (status)
1550 goto out;
1551 status = encode_restorefh(&xdr);
1552 if (status)
1553 goto out;
1554 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1555out:
1556 return status;
1557}
1558
1559/*
1560 * Encode an OPEN_CONFIRM request
1561 */
8687b63a 1562static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1da177e4
LT		 1563{
1564 struct xdr_stream xdr;
1565 struct compound_hdr hdr = {
1566 .nops = 2,
1567 };
1568 int status;
1569
1570 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1571 encode_compound_hdr(&xdr, &hdr);
1572 status = encode_putfh(&xdr, args->fh);
1573 if(status)
1574 goto out;
1575 status = encode_open_confirm(&xdr, args);
1576out:
1577 return status;
1578}
1579
1580/*
1581 * Encode an OPEN request with no attributes.
1582 */
8687b63a 1583static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1da177e4
LT		 1584{
1585 struct xdr_stream xdr;
1586 struct compound_hdr hdr = {
864472e9 1587 .nops = 3,
1da177e4
LT		 1588 };
1589 int status;
1590
1591 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1592 encode_compound_hdr(&xdr, &hdr);
1593 status = encode_putfh(&xdr, args->fh);
1594 if (status)
1595 goto out;
1596 status = encode_open(&xdr, args);
864472e9
TM		 1597 if (status)
1598 goto out;
1599 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1600out:
1601 return status;
1602}
1603
1604/*
1605 * Encode an OPEN_DOWNGRADE request
1606 */
8687b63a 1607static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1da177e4
LT		 1608{
1609 struct xdr_stream xdr;
1610 struct compound_hdr hdr = {
516a6af6 1611 .nops = 3,
1da177e4
LT		 1612 };
1613 int status;
1614
1615 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1616 encode_compound_hdr(&xdr, &hdr);
1617 status = encode_putfh(&xdr, args->fh);
1618 if (status)
1619 goto out;
1620 status = encode_open_downgrade(&xdr, args);
516a6af6
TM		 1621 if (status != 0)
1622 goto out;
1623 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1624out:
1625 return status;
1626}
1627
1628/*
1629 * Encode a LOCK request
1630 */
8687b63a 1631static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1da177e4
LT		 1632{
1633 struct xdr_stream xdr;
1634 struct compound_hdr hdr = {
1635 .nops = 2,
1636 };
1637 int status;
1638
1639 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1640 encode_compound_hdr(&xdr, &hdr);
1641 status = encode_putfh(&xdr, args->fh);
1642 if(status)
1643 goto out;
1644 status = encode_lock(&xdr, args);
1645out:
1646 return status;
1647}
1648
1649/*
1650 * Encode a LOCKT request
1651 */
8687b63a 1652static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1da177e4
LT		 1653{
1654 struct xdr_stream xdr;
1655 struct compound_hdr hdr = {
1656 .nops = 2,
1657 };
1658 int status;
1659
1660 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1661 encode_compound_hdr(&xdr, &hdr);
1662 status = encode_putfh(&xdr, args->fh);
1663 if(status)
1664 goto out;
1665 status = encode_lockt(&xdr, args);
1666out:
1667 return status;
1668}
1669
1670/*
1671 * Encode a LOCKU request
1672 */
8687b63a 1673static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1da177e4
LT		 1674{
1675 struct xdr_stream xdr;
1676 struct compound_hdr hdr = {
1677 .nops = 2,
1678 };
1679 int status;
1680
1681 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1682 encode_compound_hdr(&xdr, &hdr);
1683 status = encode_putfh(&xdr, args->fh);
1684 if(status)
1685 goto out;
1686 status = encode_locku(&xdr, args);
1687out:
1688 return status;
1689}
1690
1691/*
1692 * Encode a READLINK request
1693 */
8687b63a 1694static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1da177e4
LT		 1695{
1696 struct xdr_stream xdr;
1697 struct compound_hdr hdr = {
1698 .nops = 2,
1699 };
1700 int status;
1701
1702 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703 encode_compound_hdr(&xdr, &hdr);
1704 status = encode_putfh(&xdr, args->fh);
1705 if(status)
1706 goto out;
1707 status = encode_readlink(&xdr, args, req);
1708out:
1709 return status;
1710}
1711
1712/*
1713 * Encode a READDIR request
1714 */
8687b63a 1715static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1da177e4
LT		 1716{
1717 struct xdr_stream xdr;
1718 struct compound_hdr hdr = {
1719 .nops = 2,
1720 };
1721 int status;
1722
1723 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1724 encode_compound_hdr(&xdr, &hdr);
1725 status = encode_putfh(&xdr, args->fh);
1726 if(status)
1727 goto out;
1728 status = encode_readdir(&xdr, args, req);
1729out:
1730 return status;
1731}
1732
1733/*
1734 * Encode a READ request
1735 */
8687b63a 1736static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1da177e4
LT		 1737{
1738 struct rpc_auth *auth = req->rq_task->tk_auth;
1739 struct xdr_stream xdr;
1740 struct compound_hdr hdr = {
1741 .nops = 2,
1742 };
1743 int replen, status;
1744
1745 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746 encode_compound_hdr(&xdr, &hdr);
1747 status = encode_putfh(&xdr, args->fh);
1748 if (status)
1749 goto out;
1750 status = encode_read(&xdr, args);
1751 if (status)
1752 goto out;
1753
1754 /* set up reply kvec
1755 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1756 * + OP_READ + status + eof + datalen = 9
1757 */
1758 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1759 xdr_inline_pages(&req->rq_rcv_buf, replen,
1760 args->pages, args->pgbase, args->count);
1761out:
1762 return status;
1763}
1764
1765/*
1766 * Encode an SETATTR request
1767 */
8687b63a 1768static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1da177e4
LT		 1769
1770{
1771 struct xdr_stream xdr;
1772 struct compound_hdr hdr = {
1773 .nops = 3,
1774 };
1775 int status;
1776
1777 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1778 encode_compound_hdr(&xdr, &hdr);
1779 status = encode_putfh(&xdr, args->fh);
1780 if(status)
1781 goto out;
1782 status = encode_setattr(&xdr, args, args->server);
1783 if(status)
1784 goto out;
1785 status = encode_getfattr(&xdr, args->bitmask);
1786out:
1787 return status;
1788}
1789
029d105e
BF		 1790/*
1791 * Encode a GETACL request
1792 */
1793static int
8687b63a 1794nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
029d105e
BF		 1795 struct nfs_getaclargs *args)
1796{
1797 struct xdr_stream xdr;
1798 struct rpc_auth *auth = req->rq_task->tk_auth;
1799 struct compound_hdr hdr = {
1800 .nops = 2,
1801 };
1802 int replen, status;
1803
1804 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805 encode_compound_hdr(&xdr, &hdr);
1806 status = encode_putfh(&xdr, args->fh);
1807 if (status)
1808 goto out;
1809 status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1810 /* set up reply buffer: */
1811 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1812 xdr_inline_pages(&req->rq_rcv_buf, replen,
1813 args->acl_pages, args->acl_pgbase, args->acl_len);
1814out:
1815 return status;
1816}
1817
1da177e4
LT		 1818/*
1819 * Encode a WRITE request
1820 */
8687b63a 1821static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1da177e4
LT		 1822{
1823 struct xdr_stream xdr;
1824 struct compound_hdr hdr = {
4f9838c7 1825 .nops = 3,
1da177e4
LT		 1826 };
1827 int status;
1828
1829 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1830 encode_compound_hdr(&xdr, &hdr);
1831 status = encode_putfh(&xdr, args->fh);
1832 if (status)
1833 goto out;
1834 status = encode_write(&xdr, args);
4f9838c7
TM		 1835 if (status)
1836 goto out;
1837 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1838out:
1839 return status;
1840}
1841
1842/*
1843 * a COMMIT request
1844 */
8687b63a 1845static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1da177e4
LT		 1846{
1847 struct xdr_stream xdr;
1848 struct compound_hdr hdr = {
4f9838c7 1849 .nops = 3,
1da177e4
LT		 1850 };
1851 int status;
1852
1853 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1854 encode_compound_hdr(&xdr, &hdr);
1855 status = encode_putfh(&xdr, args->fh);
1856 if (status)
1857 goto out;
1858 status = encode_commit(&xdr, args);
4f9838c7
TM		 1859 if (status)
1860 goto out;
1861 status = encode_getfattr(&xdr, args->bitmask);
1da177e4
LT		 1862out:
1863 return status;
1864}
1865
1866/*
1867 * FSINFO request
1868 */
8687b63a 1869static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1da177e4
LT		 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_fsinfo(&xdr, args->bitmask);
1882 return status;
1883}
1884
1885/*
1886 * a PATHCONF request
1887 */
8687b63a 1888static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1da177e4 1889{
1da177e4
LT		 1890 struct xdr_stream xdr;
1891 struct compound_hdr hdr = {
1892 .nops = 2,
1893 };
1894 int status;
1895
1896 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1897 encode_compound_hdr(&xdr, &hdr);
1898 status = encode_putfh(&xdr, args->fh);
1899 if (!status)
1900 status = encode_getattr_one(&xdr,
1901 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1902 return status;
1903}
1904
1905/*
1906 * a STATFS request
1907 */
8687b63a 1908static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1da177e4 1909{
1da177e4
LT		 1910 struct xdr_stream xdr;
1911 struct compound_hdr hdr = {
1912 .nops = 2,
1913 };
1914 int status;
1915
1916 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1917 encode_compound_hdr(&xdr, &hdr);
1918 status = encode_putfh(&xdr, args->fh);
1919 if (status == 0)
1920 status = encode_getattr_two(&xdr,
1921 args->bitmask[0] & nfs4_statfs_bitmap[0],
1922 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1923 return status;
1924}
1925
1926/*
1927 * GETATTR_BITMAP request
1928 */
8687b63a 1929static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1da177e4
LT		 1930{
1931 struct xdr_stream xdr;
1932 struct compound_hdr hdr = {
1933 .nops = 2,
1934 };
1935 int status;
1936
1937 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1938 encode_compound_hdr(&xdr, &hdr);
1939 status = encode_putfh(&xdr, fhandle);
1940 if (status == 0)
1941 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1942 FATTR4_WORD0_LINK_SUPPORT|
1943 FATTR4_WORD0_SYMLINK_SUPPORT|
1944 FATTR4_WORD0_ACLSUPPORT);
1945 return status;
1946}
1947
1948/*
1949 * a RENEW request
1950 */
8687b63a 1951static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1da177e4
LT		 1952{
1953 struct xdr_stream xdr;
1954 struct compound_hdr hdr = {
1955 .nops = 1,
1956 };
1957
1958 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1959 encode_compound_hdr(&xdr, &hdr);
1960 return encode_renew(&xdr, clp);
1961}
1962
1963/*
1964 * a SETCLIENTID request
1965 */
8687b63a 1966static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1da177e4
LT		 1967{
1968 struct xdr_stream xdr;
1969 struct compound_hdr hdr = {
1970 .nops = 1,
1971 };
1972
1973 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1974 encode_compound_hdr(&xdr, &hdr);
1975 return encode_setclientid(&xdr, sc);
1976}
1977
1978/*
1979 * a SETCLIENTID_CONFIRM request
1980 */
8687b63a 1981static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1da177e4
LT		 1982{
1983 struct xdr_stream xdr;
1984 struct compound_hdr hdr = {
1985 .nops = 3,
1986 };
1987 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1988 int status;
1989
1990 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1991 encode_compound_hdr(&xdr, &hdr);
1992 status = encode_setclientid_confirm(&xdr, clp);
1993 if (!status)
1994 status = encode_putrootfh(&xdr);
1995 if (!status)
1996 status = encode_fsinfo(&xdr, lease_bitmap);
1997 return status;
1998}
1999
2000/*
2001 * DELEGRETURN request
2002 */
8687b63a 2003static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1da177e4
LT		 2004{
2005 struct xdr_stream xdr;
2006 struct compound_hdr hdr = {
fa178f29 2007 .nops = 3,
1da177e4
LT		 2008 };
2009 int status;
2010
2011 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2012 encode_compound_hdr(&xdr, &hdr);
fa178f29
TM		 2013 status = encode_putfh(&xdr, args->fhandle);
2014 if (status != 0)
2015 goto out;
2016 status = encode_delegreturn(&xdr, args->stateid);
2017 if (status != 0)
2018 goto out;
2019 status = encode_getfattr(&xdr, args->bitmask);
2020out:
1da177e4
LT		 2021 return status;
2022}
2023
683b57b4
TM		 2024/*
2025 * Encode FS_LOCATIONS request
2026 */
8687b63a 2027static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
683b57b4
TM		 2028{
2029 struct xdr_stream xdr;
2030 struct compound_hdr hdr = {
2031 .nops = 3,
2032 };
2033 struct rpc_auth *auth = req->rq_task->tk_auth;
2034 int replen;
2035 int status;
2036
2037 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2038 encode_compound_hdr(&xdr, &hdr);
2039 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2040 goto out;
2041 if ((status = encode_lookup(&xdr, args->name)) != 0)
2042 goto out;
830b8e33 2043 if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
683b57b4
TM		 2044 goto out;
2045 /* set up reply
830b8e33 2046 * toplevel_status + OP_PUTFH + status
683b57b4
TM		 2047 * + OP_LOOKUP + status + OP_GETATTR + status = 7
2048 */
2049 replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2050 xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2051 0, PAGE_SIZE);
2052out:
2053 return status;
2054}
2055
1da177e4
LT		 2056/*
2057 * START OF "GENERIC" DECODE ROUTINES.
2058 * These may look a little ugly since they are imported from a "generic"
2059 * set of XDR encode/decode routines which are intended to be shared by
2060 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2061 *
2062 * If the pain of reading these is too great, it should be a straightforward
2063 * task to translate them into Linux-specific versions which are more
2064 * consistent with the style used in NFSv2/v3...
2065 */
2066#define READ32(x) (x) = ntohl(*p++)
2067#define READ64(x) do { \
2068 (x) = (u64)ntohl(*p++) << 32; \
2069 (x) |= ntohl(*p++); \
2070} while (0)
2071#define READTIME(x) do { \
2072 p++; \
2073 (x.tv_sec) = ntohl(*p++); \
2074 (x.tv_nsec) = ntohl(*p++); \
2075} while (0)
2076#define COPYMEM(x,nbytes) do { \
2077 memcpy((x), p, nbytes); \
2078 p += XDR_QUADLEN(nbytes); \
2079} while (0)
2080
2081#define READ_BUF(nbytes) do { \
2082 p = xdr_inline_decode(xdr, nbytes); \
e4cc6ee2
CL		 2083 if (unlikely(!p)) { \
2084 printk(KERN_INFO "%s: prematurely hit end of receive" \
2085 " buffer\n", __FUNCTION__); \
2086 printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2087 __FUNCTION__, xdr->p, nbytes, xdr->end); \
1da177e4
LT		 2088 return -EIO; \
2089 } \
2090} while (0)
2091
683b57b4 2092static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
1da177e4 2093{
8687b63a 2094 __be32 *p;
1da177e4
LT		 2095
2096 READ_BUF(4);
2097 READ32(*len);
2098 READ_BUF(*len);
2099 *string = (char *)p;
2100 return 0;
2101}
2102
2103static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2104{
8687b63a 2105 __be32 *p;
1da177e4
LT		 2106
2107 READ_BUF(8);
2108 READ32(hdr->status);
2109 READ32(hdr->taglen);
2110
2111 READ_BUF(hdr->taglen + 4);
2112 hdr->tag = (char *)p;
2113 p += XDR_QUADLEN(hdr->taglen);
2114 READ32(hdr->nops);
2115 return 0;
2116}
2117
2118static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2119{
8687b63a 2120 __be32 *p;
1da177e4
LT		 2121 uint32_t opnum;
2122 int32_t nfserr;
2123
2124 READ_BUF(8);
2125 READ32(opnum);
2126 if (opnum != expected) {
2127 printk(KERN_NOTICE
2128 "nfs4_decode_op_hdr: Server returned operation"
2129 " %d but we issued a request for %d\n",
2130 opnum, expected);
2131 return -EIO;
2132 }
2133 READ32(nfserr);
2134 if (nfserr != NFS_OK)
0a8ea437 2135 return -nfs4_stat_to_errno(nfserr);
1da177e4
LT		 2136 return 0;
2137}
2138
2139/* Dummy routine */
adfa6f98 2140static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
1da177e4 2141{
8687b63a 2142 __be32 *p;
683b57b4 2143 unsigned int strlen;
1da177e4
LT		 2144 char *str;
2145
2146 READ_BUF(12);
2147 return decode_opaque_inline(xdr, &strlen, &str);
2148}
2149
2150static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2151{
8687b63a
AV		 2152 uint32_t bmlen;
2153 __be32 *p;
1da177e4
LT		 2154
2155 READ_BUF(4);
2156 READ32(bmlen);
2157
2158 bitmap[0] = bitmap[1] = 0;
2159 READ_BUF((bmlen << 2));
2160 if (bmlen > 0) {
2161 READ32(bitmap[0]);
2162 if (bmlen > 1)
2163 READ32(bitmap[1]);
2164 }
2165 return 0;
2166}
2167
8687b63a 2168static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
1da177e4 2169{
8687b63a 2170 __be32 *p;
1da177e4
LT		 2171
2172 READ_BUF(4);
2173 READ32(*attrlen);
2174 *savep = xdr->p;
2175 return 0;
2176}
2177
2178static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2179{
2180 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2181 decode_attr_bitmap(xdr, bitmask);
2182 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2183 } else
2184 bitmask[0] = bitmask[1] = 0;
2185 dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2186 return 0;
2187}
2188
2189static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2190{
8687b63a 2191 __be32 *p;
1da177e4
LT		 2192
2193 *type = 0;
2194 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2195 return -EIO;
2196 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2197 READ_BUF(4);
2198 READ32(*type);
2199 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2200 dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2201 return -EIO;
2202 }
2203 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2204 }
2205 dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2206 return 0;
2207}
2208
2209static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2210{
8687b63a 2211 __be32 *p;
1da177e4
LT		 2212
2213 *change = 0;
2214 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2215 return -EIO;
2216 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2217 READ_BUF(8);
2218 READ64(*change);
2219 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2220 }
2221 dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2222 (unsigned long long)*change);
2223 return 0;
2224}
2225
2226static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2227{
8687b63a 2228 __be32 *p;
1da177e4
LT		 2229
2230 *size = 0;
2231 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2232 return -EIO;
2233 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2234 READ_BUF(8);
2235 READ64(*size);
2236 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2237 }
2238 dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2239 return 0;
2240}
2241
2242static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2243{
8687b63a 2244 __be32 *p;
1da177e4
LT		 2245
2246 *res = 0;
2247 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2248 return -EIO;
2249 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2250 READ_BUF(4);
2251 READ32(*res);
2252 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2253 }
2254 dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2255 return 0;
2256}
2257
2258static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2259{
8687b63a 2260 __be32 *p;
1da177e4
LT		 2261
2262 *res = 0;
2263 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2264 return -EIO;
2265 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2266 READ_BUF(4);
2267 READ32(*res);
2268 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2269 }
2270 dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2271 return 0;
2272}
2273
8b4bdcf8 2274static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
1da177e4 2275{
8687b63a 2276 __be32 *p;
1da177e4
LT		 2277
2278 fsid->major = 0;
2279 fsid->minor = 0;
2280 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2281 return -EIO;
2282 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2283 READ_BUF(16);
2284 READ64(fsid->major);
2285 READ64(fsid->minor);
2286 bitmap[0] &= ~FATTR4_WORD0_FSID;
2287 }
2288 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2289 (unsigned long long)fsid->major,
2290 (unsigned long long)fsid->minor);
2291 return 0;
2292}
2293
2294static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2295{
8687b63a 2296 __be32 *p;
1da177e4
LT		 2297
2298 *res = 60;
2299 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2300 return -EIO;
2301 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2302 READ_BUF(4);
2303 READ32(*res);
2304 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2305 }
2306 dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2307 return 0;
2308}
2309
2310static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2311{
8687b63a 2312 __be32 *p;
1da177e4
LT		 2313
2314 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2315 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2316 return -EIO;
2317 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2318 READ_BUF(4);
2319 READ32(*res);
2320 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2321 }
2322 dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2323 return 0;
2324}
2325
2326static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2327{
8687b63a 2328 __be32 *p;
1da177e4
LT		 2329
2330 *fileid = 0;
2331 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2332 return -EIO;
2333 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2334 READ_BUF(8);
2335 READ64(*fileid);
2336 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2337 }
2338 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2339 return 0;
2340}
2341
99baf625
MN		 2342static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2343{
8687b63a 2344 __be32 *p;
99baf625
MN		 2345
2346 *fileid = 0;
2347 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2348 return -EIO;
2349 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2350 READ_BUF(8);
2351 READ64(*fileid);
2352 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2353 }
2354 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2355 return 0;
2356}
2357
1da177e4
LT		 2358static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2359{
8687b63a 2360 __be32 *p;
1da177e4
LT		 2361 int status = 0;
2362
2363 *res = 0;
2364 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2365 return -EIO;
2366 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2367 READ_BUF(8);
2368 READ64(*res);
2369 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2370 }
2371 dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2372 return status;
2373}
2374
2375static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2376{
8687b63a 2377 __be32 *p;
1da177e4
LT		 2378 int status = 0;
2379
2380 *res = 0;
2381 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2382 return -EIO;
2383 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2384 READ_BUF(8);
2385 READ64(*res);
2386 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2387 }
2388 dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2389 return status;
2390}
2391
2392static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2393{
8687b63a 2394 __be32 *p;
1da177e4
LT		 2395 int status = 0;
2396
2397 *res = 0;
2398 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2399 return -EIO;
2400 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2401 READ_BUF(8);
2402 READ64(*res);
2403 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2404 }
2405 dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2406 return status;
2407}
2408
7aaa0b3b
MN		 2409static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2410{
2411 int n;
8687b63a 2412 __be32 *p;
7aaa0b3b
MN		 2413 int status = 0;
2414
2415 READ_BUF(4);
2416 READ32(n);
33a43f28 2417 if (n < 0)
7aaa0b3b 2418 goto out_eio;
33a43f28
AA		 2419 if (n == 0)
2420 goto root_path;
7aaa0b3b
MN		 2421 dprintk("path ");
2422 path->ncomponents = 0;
2423 while (path->ncomponents < n) {
2424 struct nfs4_string *component = &path->components[path->ncomponents];
2425 status = decode_opaque_inline(xdr, &component->len, &component->data);
2426 if (unlikely(status != 0))
2427 goto out_eio;
2428 if (path->ncomponents != n)
2429 dprintk("/");
2430 dprintk("%s", component->data);
2431 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2432 path->ncomponents++;
2433 else {
2434 dprintk("cannot parse %d components in path\n", n);
2435 goto out_eio;
2436 }
2437 }
2438out:
2439 dprintk("\n");
2440 return status;
33a43f28
AA		 2441root_path:
2442/* a root pathname is sent as a zero component4 */
2443 path->ncomponents = 1;
2444 path->components[0].len=0;
2445 path->components[0].data=NULL;
2446 dprintk("path /\n");
2447 goto out;
7aaa0b3b
MN		 2448out_eio:
2449 dprintk(" status %d", status);
2450 status = -EIO;
2451 goto out;
2452}
2453
2454static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
683b57b4
TM		 2455{
2456 int n;
8687b63a 2457 __be32 *p;
683b57b4
TM		 2458 int status = -EIO;
2459
2460 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2461 goto out;
2462 status = 0;
2463 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2464 goto out;
7aaa0b3b
MN		 2465 dprintk("%s: fsroot ", __FUNCTION__);
2466 status = decode_pathname(xdr, &res->fs_path);
683b57b4
TM		 2467 if (unlikely(status != 0))
2468 goto out;
2469 READ_BUF(4);
2470 READ32(n);
2471 if (n <= 0)
2472 goto out_eio;
2473 res->nlocations = 0;
2474 while (res->nlocations < n) {
7aaa0b3b
MN		 2475 int m;
2476 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
683b57b4 2477
7aaa0b3b
MN		 2478 READ_BUF(4);
2479 READ32(m);
2480 if (m <= 0)
683b57b4 2481 goto out_eio;
7aaa0b3b
MN		 2482
2483 loc->nservers = 0;
2484 dprintk("%s: servers ", __FUNCTION__);
2485 while (loc->nservers < m) {
2486 struct nfs4_string *server = &loc->servers[loc->nservers];
2487 status = decode_opaque_inline(xdr, &server->len, &server->data);
2488 if (unlikely(status != 0))
2489 goto out_eio;
2490 dprintk("%s ", server->data);
2491 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2492 loc->nservers++;
2493 else {
2494 int i;
2495 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2496 for (i = loc->nservers; i < m; i++) {
2497 int len;
2498 char *data;
2499 status = decode_opaque_inline(xdr, &len, &data);
2500 if (unlikely(status != 0))
2501 goto out_eio;
2502 }
2503 }
2504 }
2505 status = decode_pathname(xdr, &loc->rootpath);
683b57b4
TM		 2506 if (unlikely(status != 0))
2507 goto out_eio;
7aaa0b3b 2508 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
683b57b4
TM		 2509 res->nlocations++;
2510 }
2511out:
2512 dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2513 return status;
2514out_eio:
2515 status = -EIO;
2516 goto out;
2517}
2518
1da177e4
LT		 2519static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2520{
8687b63a 2521 __be32 *p;
1da177e4
LT		 2522 int status = 0;
2523
2524 *res = 0;
2525 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2526 return -EIO;
2527 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2528 READ_BUF(8);
2529 READ64(*res);
2530 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2531 }
2532 dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2533 return status;
2534}
2535
2536static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2537{
8687b63a 2538 __be32 *p;
1da177e4
LT		 2539 int status = 0;
2540
2541 *maxlink = 1;
2542 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2543 return -EIO;
2544 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2545 READ_BUF(4);
2546 READ32(*maxlink);
2547 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2548 }
2549 dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2550 return status;
2551}
2552
2553static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2554{
8687b63a 2555 __be32 *p;
1da177e4
LT		 2556 int status = 0;
2557
2558 *maxname = 1024;
2559 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2560 return -EIO;
2561 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2562 READ_BUF(4);
2563 READ32(*maxname);
2564 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2565 }
2566 dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2567 return status;
2568}
2569
2570static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2571{
8687b63a 2572 __be32 *p;
1da177e4
LT		 2573 int status = 0;
2574
2575 *res = 1024;
2576 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2577 return -EIO;
2578 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2579 uint64_t maxread;
2580 READ_BUF(8);
2581 READ64(maxread);
2582 if (maxread > 0x7FFFFFFF)
2583 maxread = 0x7FFFFFFF;
2584 *res = (uint32_t)maxread;
2585 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2586 }
2587 dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2588 return status;
2589}
2590
2591static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2592{
8687b63a 2593 __be32 *p;
1da177e4
LT		 2594 int status = 0;
2595
2596 *res = 1024;
2597 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2598 return -EIO;
2599 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2600 uint64_t maxwrite;
2601 READ_BUF(8);
2602 READ64(maxwrite);
2603 if (maxwrite > 0x7FFFFFFF)
2604 maxwrite = 0x7FFFFFFF;
2605 *res = (uint32_t)maxwrite;
2606 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2607 }
2608 dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2609 return status;
2610}
2611
2612static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2613{
8687b63a 2614 __be32 *p;
1da177e4
LT		 2615
2616 *mode = 0;
2617 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2618 return -EIO;
2619 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2620 READ_BUF(4);
2621 READ32(*mode);
2622 *mode &= ~S_IFMT;
2623 bitmap[1] &= ~FATTR4_WORD1_MODE;
2624 }
2625 dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2626 return 0;
2627}
2628
2629static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2630{
8687b63a 2631 __be32 *p;
1da177e4
LT		 2632
2633 *nlink = 1;
2634 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2635 return -EIO;
2636 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2637 READ_BUF(4);
2638 READ32(*nlink);
2639 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2640 }
2641 dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2642 return 0;
2643}
2644
adfa6f98 2645static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *uid)
1da177e4 2646{
8687b63a
AV		 2647 uint32_t len;
2648 __be32 *p;
1da177e4
LT		 2649
2650 *uid = -2;
2651 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2652 return -EIO;
2653 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2654 READ_BUF(4);
2655 READ32(len);
2656 READ_BUF(len);
2657 if (len < XDR_MAX_NETOBJ) {
2658 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2659 dprintk("%s: nfs_map_name_to_uid failed!\n",
2660 __FUNCTION__);
2661 } else
2662 printk(KERN_WARNING "%s: name too long (%u)!\n",
2663 __FUNCTION__, len);
2664 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2665 }
2666 dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2667 return 0;
2668}
2669
adfa6f98 2670static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *gid)
1da177e4 2671{
8687b63a
AV		 2672 uint32_t len;
2673 __be32 *p;
1da177e4
LT		 2674
2675 *gid = -2;
2676 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2677 return -EIO;
2678 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2679 READ_BUF(4);
2680 READ32(len);
2681 READ_BUF(len);
2682 if (len < XDR_MAX_NETOBJ) {
2683 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2684 dprintk("%s: nfs_map_group_to_gid failed!\n",
2685 __FUNCTION__);
2686 } else
2687 printk(KERN_WARNING "%s: name too long (%u)!\n",
2688 __FUNCTION__, len);
2689 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2690 }
2691 dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2692 return 0;
2693}
2694
2695static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2696{
8687b63a
AV		 2697 uint32_t major = 0, minor = 0;
2698 __be32 *p;
1da177e4
LT		 2699
2700 *rdev = MKDEV(0,0);
2701 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2702 return -EIO;
2703 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2704 dev_t tmp;
2705
2706 READ_BUF(8);
2707 READ32(major);
2708 READ32(minor);
2709 tmp = MKDEV(major, minor);
2710 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2711 *rdev = tmp;
2712 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2713 }
2714 dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2715 return 0;
2716}
2717
2718static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2719{
8687b63a 2720 __be32 *p;
1da177e4
LT		 2721 int status = 0;
2722
2723 *res = 0;
2724 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2725 return -EIO;
2726 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2727 READ_BUF(8);
2728 READ64(*res);
2729 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2730 }
2731 dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2732 return status;
2733}
2734
2735static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2736{
8687b63a 2737 __be32 *p;
1da177e4
LT		 2738 int status = 0;
2739
2740 *res = 0;
2741 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2742 return -EIO;
2743 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2744 READ_BUF(8);
2745 READ64(*res);
2746 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2747 }
2748 dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2749 return status;
2750}
2751
2752static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2753{
8687b63a 2754 __be32 *p;
1da177e4
LT		 2755 int status = 0;
2756
2757 *res = 0;
2758 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2759 return -EIO;
2760 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2761 READ_BUF(8);
2762 READ64(*res);
2763 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2764 }
2765 dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2766 return status;
2767}
2768
2769static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2770{
8687b63a 2771 __be32 *p;
1da177e4
LT		 2772
2773 *used = 0;
2774 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2775 return -EIO;
2776 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2777 READ_BUF(8);
2778 READ64(*used);
2779 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2780 }
2781 dprintk("%s: space used=%Lu\n", __FUNCTION__,
2782 (unsigned long long)*used);
2783 return 0;
2784}
2785
2786static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2787{
8687b63a 2788 __be32 *p;
1da177e4
LT		 2789 uint64_t sec;
2790 uint32_t nsec;
2791
2792 READ_BUF(12);
2793 READ64(sec);
2794 READ32(nsec);
2795 time->tv_sec = (time_t)sec;
2796 time->tv_nsec = (long)nsec;
2797 return 0;
2798}
2799
2800static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2801{
2802 int status = 0;
2803
2804 time->tv_sec = 0;
2805 time->tv_nsec = 0;
2806 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2807 return -EIO;
2808 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2809 status = decode_attr_time(xdr, time);
2810 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2811 }
2812 dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2813 return status;
2814}
2815
2816static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2817{
2818 int status = 0;
2819
2820 time->tv_sec = 0;
2821 time->tv_nsec = 0;
2822 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2823 return -EIO;
2824 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2825 status = decode_attr_time(xdr, time);
2826 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2827 }
2828 dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2829 return status;
2830}
2831
2832static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2833{
2834 int status = 0;
2835
2836 time->tv_sec = 0;
2837 time->tv_nsec = 0;
2838 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2839 return -EIO;
2840 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2841 status = decode_attr_time(xdr, time);
2842 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2843 }
2844 dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2845 return status;
2846}
2847
8687b63a 2848static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
1da177e4
LT		 2849{
2850 unsigned int attrwords = XDR_QUADLEN(attrlen);
2851 unsigned int nwords = xdr->p - savep;
2852
2853 if (unlikely(attrwords != nwords)) {
2854 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2855 __FUNCTION__,
2856 attrwords << 2,
2857 (attrwords < nwords) ? '<' : '>',
2858 nwords << 2);
2859 return -EIO;
2860 }
2861 return 0;
2862}
2863
2864static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2865{
8687b63a 2866 __be32 *p;
1da177e4
LT		 2867
2868 READ_BUF(20);
2869 READ32(cinfo->atomic);
2870 READ64(cinfo->before);
2871 READ64(cinfo->after);
2872 return 0;
2873}
2874
2875static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2876{
8687b63a 2877 __be32 *p;
1da177e4
LT		 2878 uint32_t supp, acc;
2879 int status;
2880
2881 status = decode_op_hdr(xdr, OP_ACCESS);
2882 if (status)
2883 return status;
2884 READ_BUF(8);
2885 READ32(supp);
2886 READ32(acc);
2887 access->supported = supp;
2888 access->access = acc;
2889 return 0;
2890}
2891
2892static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2893{
8687b63a 2894 __be32 *p;
1da177e4
LT		 2895 int status;
2896
2897 status = decode_op_hdr(xdr, OP_CLOSE);
2898 if (status)
2899 return status;
8ae20abd
TM		 2900 READ_BUF(NFS4_STATEID_SIZE);
2901 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 2902 return 0;
2903}
2904
2905static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2906{
8687b63a 2907 __be32 *p;
1da177e4
LT		 2908 int status;
2909
2910 status = decode_op_hdr(xdr, OP_COMMIT);
2911 if (status)
2912 return status;
2913 READ_BUF(8);
2914 COPYMEM(res->verf->verifier, 8);
2915 return 0;
2916}
2917
2918static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2919{
8687b63a 2920 __be32 *p;
1da177e4
LT		 2921 uint32_t bmlen;
2922 int status;
2923
2924 status = decode_op_hdr(xdr, OP_CREATE);
2925 if (status)
2926 return status;
2927 if ((status = decode_change_info(xdr, cinfo)))
2928 return status;
2929 READ_BUF(4);
2930 READ32(bmlen);
2931 READ_BUF(bmlen << 2);
2932 return 0;
2933}
2934
2935static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2936{
8687b63a 2937 __be32 *savep;
1da177e4
LT		 2938 uint32_t attrlen,
2939 bitmap[2] = {0};
2940 int status;
2941
2942 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2943 goto xdr_error;
2944 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2945 goto xdr_error;
2946 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2947 goto xdr_error;
2948 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2949 goto xdr_error;
2950 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2951 goto xdr_error;
2952 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2953 goto xdr_error;
2954 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2955 goto xdr_error;
2956 status = verify_attr_len(xdr, savep, attrlen);
2957xdr_error:
16c32b71 2958 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
1da177e4
LT		 2959 return status;
2960}
2961
2962static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2963{
8687b63a 2964 __be32 *savep;
1da177e4
LT		 2965 uint32_t attrlen,
2966 bitmap[2] = {0};
2967 int status;
2968
2969 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2970 goto xdr_error;
2971 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2972 goto xdr_error;
2973 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2974 goto xdr_error;
2975
2976 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2977 goto xdr_error;
2978 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2979 goto xdr_error;
2980 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2981 goto xdr_error;
2982 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2983 goto xdr_error;
2984 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2985 goto xdr_error;
2986 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2987 goto xdr_error;
2988
2989 status = verify_attr_len(xdr, savep, attrlen);
2990xdr_error:
16c32b71 2991 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
1da177e4
LT		 2992 return status;
2993}
2994
2995static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2996{
8687b63a 2997 __be32 *savep;
1da177e4
LT		 2998 uint32_t attrlen,
2999 bitmap[2] = {0};
3000 int status;
3001
3002 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3003 goto xdr_error;
3004 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3005 goto xdr_error;
3006 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3007 goto xdr_error;
3008
3009 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3010 goto xdr_error;
3011 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3012 goto xdr_error;
3013
3014 status = verify_attr_len(xdr, savep, attrlen);
3015xdr_error:
16c32b71 3016 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
1da177e4
LT		 3017 return status;
3018}
3019
3020static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3021{
8687b63a 3022 __be32 *savep;
1da177e4
LT		 3023 uint32_t attrlen,
3024 bitmap[2] = {0},
3025 type;
3026 int status, fmode = 0;
99baf625 3027 uint64_t fileid;
1da177e4
LT		 3028
3029 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3030 goto xdr_error;
3031 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3032 goto xdr_error;
3033
3034 fattr->bitmap[0] = bitmap[0];
3035 fattr->bitmap[1] = bitmap[1];
3036
3037 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3038 goto xdr_error;
3039
3040
3041 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3042 goto xdr_error;
3043 fattr->type = nfs_type2fmt[type].nfs2type;
3044 fmode = nfs_type2fmt[type].mode;
3045
3046 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3047 goto xdr_error;
3048 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3049 goto xdr_error;
8b4bdcf8 3050 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
1da177e4
LT		 3051 goto xdr_error;
3052 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3053 goto xdr_error;
683b57b4 3054 if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
7aaa0b3b 3055 struct nfs4_fs_locations,
683b57b4
TM		 3056 fattr))) != 0)
3057 goto xdr_error;
1da177e4
LT		 3058 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3059 goto xdr_error;
3060 fattr->mode |= fmode;
3061 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3062 goto xdr_error;
7539bbab 3063 if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
1da177e4 3064 goto xdr_error;
7539bbab 3065 if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
1da177e4
LT		 3066 goto xdr_error;
3067 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3068 goto xdr_error;
3069 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3070 goto xdr_error;
3071 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3072 goto xdr_error;
3073 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3074 goto xdr_error;
3075 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3076 goto xdr_error;
99baf625
MN		 3077 if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3078 goto xdr_error;
3079 if (fattr->fileid == 0 && fileid != 0)
3080 fattr->fileid = fileid;
33801147 3081 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
1da177e4 3082 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
1da177e4 3083xdr_error:
16c32b71 3084 dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
1da177e4
LT		 3085 return status;
3086}
3087
3088
3089static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3090{
8687b63a 3091 __be32 *savep;
1da177e4
LT		 3092 uint32_t attrlen, bitmap[2];
3093 int status;
3094
3095 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3096 goto xdr_error;
3097 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3098 goto xdr_error;
3099 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3100 goto xdr_error;
3101
3102 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3103
3104 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3105 goto xdr_error;
3106 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3107 goto xdr_error;
3108 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3109 goto xdr_error;
3110 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3111 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3112 goto xdr_error;
3113 fsinfo->wtpref = fsinfo->wtmax;
3114
3115 status = verify_attr_len(xdr, savep, attrlen);
3116xdr_error:
16c32b71 3117 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
1da177e4
LT		 3118 return status;
3119}
3120
3121static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3122{
8687b63a 3123 __be32 *p;
1da177e4
LT		 3124 uint32_t len;
3125 int status;
3126
3127 status = decode_op_hdr(xdr, OP_GETFH);
3128 if (status)
3129 return status;
3130 /* Zero handle first to allow comparisons */
3131 memset(fh, 0, sizeof(*fh));
3132
3133 READ_BUF(4);
3134 READ32(len);
3135 if (len > NFS4_FHSIZE)
3136 return -EIO;
3137 fh->size = len;
3138 READ_BUF(len);
3139 COPYMEM(fh->data, len);
3140 return 0;
3141}
3142
3143static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3144{
3145 int status;
3146
3147 status = decode_op_hdr(xdr, OP_LINK);
3148 if (status)
3149 return status;
3150 return decode_change_info(xdr, cinfo);
3151}
3152
3153/*
3154 * We create the owner, so we know a proper owner.id length is 4.
3155 */
911d1aaf 3156static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
1da177e4 3157{
911d1aaf 3158 uint64_t offset, length, clientid;
8687b63a 3159 __be32 *p;
911d1aaf 3160 uint32_t namelen, type;
1da177e4
LT		 3161
3162 READ_BUF(32);
911d1aaf
TM		 3163 READ64(offset);
3164 READ64(length);
3165 READ32(type);
3166 if (fl != NULL) {
3167 fl->fl_start = (loff_t)offset;
3168 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3169 if (length == ~(uint64_t)0)
3170 fl->fl_end = OFFSET_MAX;
3171 fl->fl_type = F_WRLCK;
3172 if (type & 1)
3173 fl->fl_type = F_RDLCK;
3174 fl->fl_pid = 0;
3175 }
3176 READ64(clientid);
1da177e4
LT		 3177 READ32(namelen);
3178 READ_BUF(namelen);
1da177e4
LT		 3179 return -NFS4ERR_DENIED;
3180}
3181
911d1aaf 3182static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
1da177e4 3183{
8687b63a 3184 __be32 *p;
1da177e4
LT		 3185 int status;
3186
3187 status = decode_op_hdr(xdr, OP_LOCK);
3188 if (status == 0) {
8ae20abd
TM		 3189 READ_BUF(NFS4_STATEID_SIZE);
3190 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
1da177e4 3191 } else if (status == -NFS4ERR_DENIED)
911d1aaf 3192 return decode_lock_denied(xdr, NULL);
1da177e4
LT		 3193 return status;
3194}
3195
911d1aaf 3196static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
1da177e4
LT		 3197{
3198 int status;
3199 status = decode_op_hdr(xdr, OP_LOCKT);
3200 if (status == -NFS4ERR_DENIED)
911d1aaf 3201 return decode_lock_denied(xdr, res->denied);
1da177e4
LT		 3202 return status;
3203}
3204
911d1aaf 3205static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
1da177e4 3206{
8687b63a 3207 __be32 *p;
1da177e4
LT		 3208 int status;
3209
3210 status = decode_op_hdr(xdr, OP_LOCKU);
3211 if (status == 0) {
8ae20abd
TM		 3212 READ_BUF(NFS4_STATEID_SIZE);
3213 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 3214 }
3215 return status;
3216}
3217
3218static int decode_lookup(struct xdr_stream *xdr)
3219{
3220 return decode_op_hdr(xdr, OP_LOOKUP);
3221}
3222
3223/* This is too sick! */
3224static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3225{
8687b63a 3226 __be32 *p;
1da177e4
LT		 3227 uint32_t limit_type, nblocks, blocksize;
3228
3229 READ_BUF(12);
3230 READ32(limit_type);
3231 switch (limit_type) {
3232 case 1:
3233 READ64(*maxsize);
3234 break;
3235 case 2:
3236 READ32(nblocks);
3237 READ32(blocksize);
3238 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3239 }
3240 return 0;
3241}
3242
3243static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3244{
8687b63a 3245 __be32 *p;
1da177e4
LT		 3246 uint32_t delegation_type;
3247
3248 READ_BUF(4);
3249 READ32(delegation_type);
3250 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3251 res->delegation_type = 0;
3252 return 0;
3253 }
8ae20abd
TM		 3254 READ_BUF(NFS4_STATEID_SIZE+4);
3255 COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
1da177e4
LT		 3256 READ32(res->do_recall);
3257 switch (delegation_type) {
3258 case NFS4_OPEN_DELEGATE_READ:
3259 res->delegation_type = FMODE_READ;
3260 break;
3261 case NFS4_OPEN_DELEGATE_WRITE:
3262 res->delegation_type = FMODE_WRITE|FMODE_READ;
3263 if (decode_space_limit(xdr, &res->maxsize) < 0)
3264 return -EIO;
3265 }
7539bbab 3266 return decode_ace(xdr, NULL, res->server->nfs_client);
1da177e4
LT		 3267}
3268
3269static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3270{
8687b63a 3271 __be32 *p;
1da177e4
LT		 3272 uint32_t bmlen;
3273 int status;
3274
3275 status = decode_op_hdr(xdr, OP_OPEN);
3276 if (status)
3277 return status;
8ae20abd
TM		 3278 READ_BUF(NFS4_STATEID_SIZE);
3279 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 3280
3281 decode_change_info(xdr, &res->cinfo);
3282
3283 READ_BUF(8);
3284 READ32(res->rflags);
3285 READ32(bmlen);
3286 if (bmlen > 10)
3287 goto xdr_error;
3288
3289 READ_BUF(bmlen << 2);
3290 p += bmlen;
3291 return decode_delegation(xdr, res);
3292xdr_error:
16c32b71 3293 dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
1da177e4
LT		 3294 return -EIO;
3295}
3296
3297static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3298{
8687b63a 3299 __be32 *p;
1da177e4
LT		 3300 int status;
3301
3302 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3303 if (status)
3304 return status;
8ae20abd
TM		 3305 READ_BUF(NFS4_STATEID_SIZE);
3306 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 3307 return 0;
3308}
3309
3310static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3311{
8687b63a 3312 __be32 *p;
1da177e4
LT		 3313 int status;
3314
3315 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3316 if (status)
3317 return status;
8ae20abd
TM		 3318 READ_BUF(NFS4_STATEID_SIZE);
3319 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
1da177e4
LT		 3320 return 0;
3321}
3322
3323static int decode_putfh(struct xdr_stream *xdr)
3324{
3325 return decode_op_hdr(xdr, OP_PUTFH);
3326}
3327
3328static int decode_putrootfh(struct xdr_stream *xdr)
3329{
3330 return decode_op_hdr(xdr, OP_PUTROOTFH);
3331}
3332
3333static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3334{
3335 struct kvec *iov = req->rq_rcv_buf.head;
8687b63a 3336 __be32 *p;
1da177e4
LT		 3337 uint32_t count, eof, recvd, hdrlen;
3338 int status;
3339
3340 status = decode_op_hdr(xdr, OP_READ);
3341 if (status)
3342 return status;
3343 READ_BUF(8);
3344 READ32(eof);
3345 READ32(count);
3346 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3347 recvd = req->rq_rcv_buf.len - hdrlen;
3348 if (count > recvd) {
3349 printk(KERN_WARNING "NFS: server cheating in read reply: "
3350 "count %u > recvd %u\n", count, recvd);
3351 count = recvd;
3352 eof = 0;
3353 }
3354 xdr_read_pages(xdr, count);
3355 res->eof = eof;
3356 res->count = count;
3357 return 0;
3358}
3359
3360static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3361{
3362 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3363 struct page *page = *rcvbuf->pages;
3364 struct kvec *iov = rcvbuf->head;
3365 unsigned int nr, pglen = rcvbuf->page_len;
8687b63a 3366 __be32 *end, *entry, *p, *kaddr;
e8896495 3367 uint32_t len, attrlen, xlen;
1da177e4
LT		 3368 int hdrlen, recvd, status;
3369
3370 status = decode_op_hdr(xdr, OP_READDIR);
3371 if (status)
3372 return status;
3373 READ_BUF(8);
3374 COPYMEM(readdir->verifier.data, 8);
eadf4598
TM		 3375 dprintk("%s: verifier = 0x%x%x\n",
3376 __FUNCTION__,
3377 ((u32 *)readdir->verifier.data)[0],
3378 ((u32 *)readdir->verifier.data)[1]);
3379
1da177e4
LT		 3380
3381 hdrlen = (char *) p - (char *) iov->iov_base;
3382 recvd = rcvbuf->len - hdrlen;
3383 if (pglen > recvd)
3384 pglen = recvd;
3385 xdr_read_pages(xdr, pglen);
3386
3387 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
8687b63a 3388 kaddr = p = kmap_atomic(page, KM_USER0);
e8896495 3389 end = p + ((pglen + readdir->pgbase) >> 2);
1da177e4
LT		 3390 entry = p;
3391 for (nr = 0; *p++; nr++) {
e8896495 3392 if (end - p < 3)
1da177e4 3393 goto short_pkt;
eadf4598 3394 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
1da177e4
LT		 3395 p += 2; /* cookie */
3396 len = ntohl(*p++); /* filename length */
3397 if (len > NFS4_MAXNAMLEN) {
3398 printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3399 goto err_unmap;
3400 }
e8896495
DH		 3401 xlen = XDR_QUADLEN(len);
3402 if (end - p < xlen + 1)
1da177e4 3403 goto short_pkt;
e8896495
DH		 3404 dprintk("filename = %*s\n", len, (char *)p);
3405 p += xlen;
1da177e4 3406 len = ntohl(*p++); /* bitmap length */
e8896495 3407 if (end - p < len + 1)
1da177e4 3408 goto short_pkt;
e8896495 3409 p += len;
1da177e4 3410 attrlen = XDR_QUADLEN(ntohl(*p++));
e8896495 3411 if (end - p < attrlen + 2)
1da177e4 3412 goto short_pkt;
e8896495 3413 p += attrlen; /* attributes */
1da177e4
LT		 3414 entry = p;
3415 }
3416 if (!nr && (entry[0] != 0 || entry[1] == 0))
3417 goto short_pkt;
3418out:
3419 kunmap_atomic(kaddr, KM_USER0);
3420 return 0;
3421short_pkt:
eadf4598 3422 dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
1da177e4
LT		 3423 entry[0] = entry[1] = 0;
3424 /* truncate listing ? */
3425 if (!nr) {
3426 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3427 entry[1] = 1;
3428 }
3429 goto out;
3430err_unmap:
3431 kunmap_atomic(kaddr, KM_USER0);
3432 return -errno_NFSERR_IO;
3433}
3434
3435static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3436{
3437 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3438 struct kvec *iov = rcvbuf->head;
3439 int hdrlen, len, recvd;
8687b63a 3440 __be32 *p;
1da177e4
LT		 3441 char *kaddr;
3442 int status;
3443
3444 status = decode_op_hdr(xdr, OP_READLINK);
3445 if (status)
3446 return status;
3447
3448 /* Convert length of symlink */
3449 READ_BUF(4);
3450 READ32(len);
3451 if (len >= rcvbuf->page_len || len <= 0) {
3452 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3453 return -ENAMETOOLONG;
3454 }
3455 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3456 recvd = req->rq_rcv_buf.len - hdrlen;
3457 if (recvd < len) {
3458 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3459 "count %u > recvd %u\n", len, recvd);
3460 return -EIO;
3461 }
3462 xdr_read_pages(xdr, len);
3463 /*
3464 * The XDR encode routine has set things up so that
3465 * the link text will be copied directly into the
3466 * buffer. We just have to do overflow-checking,
3467 * and and null-terminate the text (the VFS expects
3468 * null-termination).
3469 */
3470 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3471 kaddr[len+rcvbuf->page_base] = '\0';
3472 kunmap_atomic(kaddr, KM_USER0);
3473 return 0;
3474}
3475
3476static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3477{
3478 int status;
3479
3480 status = decode_op_hdr(xdr, OP_REMOVE);
3481 if (status)
3482 goto out;
3483 status = decode_change_info(xdr, cinfo);
3484out:
3485 return status;
3486}
3487
3488static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3489 struct nfs4_change_info *new_cinfo)
3490{
3491 int status;
3492
3493 status = decode_op_hdr(xdr, OP_RENAME);
3494 if (status)
3495 goto out;
3496 if ((status = decode_change_info(xdr, old_cinfo)))
3497 goto out;
3498 status = decode_change_info(xdr, new_cinfo);
3499out:
3500 return status;
3501}
3502
3503static int decode_renew(struct xdr_stream *xdr)
3504{
3505 return decode_op_hdr(xdr, OP_RENEW);
3506}
3507
56ae19f3
TM		 3508static int
3509decode_restorefh(struct xdr_stream *xdr)
3510{
3511 return decode_op_hdr(xdr, OP_RESTOREFH);
3512}
3513
029d105e
BF		 3514static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3515 size_t *acl_len)
3516{
8687b63a 3517 __be32 *savep;
029d105e
BF		 3518 uint32_t attrlen,
3519 bitmap[2] = {0};
3520 struct kvec *iov = req->rq_rcv_buf.head;
3521 int status;
3522
3523 *acl_len = 0;
3524 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3525 goto out;
3526 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3527 goto out;
3528 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3529 goto out;
3530
3531 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3532 return -EIO;
3533 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3534 int hdrlen, recvd;
3535
3536 /* We ignore &savep and don't do consistency checks on
3537 * the attr length. Let userspace figure it out.... */
3538 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3539 recvd = req->rq_rcv_buf.len - hdrlen;
3540 if (attrlen > recvd) {
3541 printk(KERN_WARNING "NFS: server cheating in getattr"
3542 " acl reply: attrlen %u > recvd %u\n",
3543 attrlen, recvd);
3544 return -EINVAL;
3545 }
c04871e6 3546 xdr_read_pages(xdr, attrlen);
029d105e 3547 *acl_len = attrlen;
8c233cf9
BF		 3548 } else
3549 status = -EOPNOTSUPP;
029d105e
BF		 3550
3551out:
3552 return status;
3553}
3554
1da177e4
LT		 3555static int
3556decode_savefh(struct xdr_stream *xdr)
3557{
3558 return decode_op_hdr(xdr, OP_SAVEFH);
3559}
3560
3561static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3562{
8687b63a 3563 __be32 *p;
1da177e4
LT		 3564 uint32_t bmlen;
3565 int status;
3566
3567
3568 status = decode_op_hdr(xdr, OP_SETATTR);
3569 if (status)
3570 return status;
3571 READ_BUF(4);
3572 READ32(bmlen);
3573 READ_BUF(bmlen << 2);
3574 return 0;
3575}
3576
adfa6f98 3577static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
1da177e4 3578{
8687b63a 3579 __be32 *p;
1da177e4
LT		 3580 uint32_t opnum;
3581 int32_t nfserr;
3582
3583 READ_BUF(8);
3584 READ32(opnum);
3585 if (opnum != OP_SETCLIENTID) {
3586 printk(KERN_NOTICE
3587 "nfs4_decode_setclientid: Server returned operation"
3588 " %d\n", opnum);
3589 return -EIO;
3590 }
3591 READ32(nfserr);
3592 if (nfserr == NFS_OK) {
8ae20abd 3593 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 3594 READ64(clp->cl_clientid);
8ae20abd 3595 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3596 } else if (nfserr == NFSERR_CLID_INUSE) {
3597 uint32_t len;
3598
3599 /* skip netid string */
3600 READ_BUF(4);
3601 READ32(len);
3602 READ_BUF(len);
3603
3604 /* skip uaddr string */
3605 READ_BUF(4);
3606 READ32(len);
3607 READ_BUF(len);
3608 return -NFSERR_CLID_INUSE;
3609 } else
0a8ea437 3610 return -nfs4_stat_to_errno(nfserr);
1da177e4
LT		 3611
3612 return 0;
3613}
3614
3615static int decode_setclientid_confirm(struct xdr_stream *xdr)
3616{
3617 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3618}
3619
3620static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3621{
8687b63a 3622 __be32 *p;
1da177e4
LT		 3623 int status;
3624
3625 status = decode_op_hdr(xdr, OP_WRITE);
3626 if (status)
3627 return status;
3628
3629 READ_BUF(16);
3630 READ32(res->count);
3631 READ32(res->verf->committed);
3632 COPYMEM(res->verf->verifier, 8);
3633 return 0;
3634}
3635
3636static int decode_delegreturn(struct xdr_stream *xdr)
3637{
3638 return decode_op_hdr(xdr, OP_DELEGRETURN);
3639}
3640
3641/*
3642 * Decode OPEN_DOWNGRADE response
3643 */
8687b63a 3644static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
1da177e4
LT		 3645{
3646 struct xdr_stream xdr;
3647 struct compound_hdr hdr;
3648 int status;
3649
3650 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3651 status = decode_compound_hdr(&xdr, &hdr);
3652 if (status)
3653 goto out;
3654 status = decode_putfh(&xdr);
3655 if (status)
3656 goto out;
3657 status = decode_open_downgrade(&xdr, res);
516a6af6
TM		 3658 if (status != 0)
3659 goto out;
3660 decode_getfattr(&xdr, res->fattr, res->server);
1da177e4
LT		 3661out:
3662 return status;
3663}
3664
3665/*
3666 * END OF "GENERIC" DECODE ROUTINES.
3667 */
3668
3669/*
3670 * Decode ACCESS response
3671 */
8687b63a 3672static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
1da177e4
LT		 3673{
3674 struct xdr_stream xdr;
3675 struct compound_hdr hdr;
3676 int status;
3677
3678 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3679 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3680 goto out;
3681 if ((status = decode_putfh(&xdr)) == 0)
3682 status = decode_access(&xdr, res);
3683out:
3684 return status;
3685}
3686
3687/*
3688 * Decode LOOKUP response
3689 */
8687b63a 3690static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
1da177e4
LT		 3691{
3692 struct xdr_stream xdr;
3693 struct compound_hdr hdr;
3694 int status;
3695
3696 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3697 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3698 goto out;
3699 if ((status = decode_putfh(&xdr)) != 0)
3700 goto out;
3701 if ((status = decode_lookup(&xdr)) != 0)
3702 goto out;
3703 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3704 goto out;
3705 status = decode_getfattr(&xdr, res->fattr, res->server);
3706out:
3707 return status;
3708}
3709
3710/*
3711 * Decode LOOKUP_ROOT response
3712 */
8687b63a 3713static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
1da177e4
LT		 3714{
3715 struct xdr_stream xdr;
3716 struct compound_hdr hdr;
3717 int status;
3718
3719 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3720 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3721 goto out;
3722 if ((status = decode_putrootfh(&xdr)) != 0)
3723 goto out;
3724 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3725 status = decode_getfattr(&xdr, res->fattr, res->server);
3726out:
3727 return status;
3728}
3729
3730/*
3731 * Decode REMOVE response
3732 */
8687b63a 3733static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
1da177e4
LT		 3734{
3735 struct xdr_stream xdr;
3736 struct compound_hdr hdr;
3737 int status;
3738
3739 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3740 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3741 goto out;
16e42959
TM		 3742 if ((status = decode_putfh(&xdr)) != 0)
3743 goto out;
3744 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3745 goto out;
3746 decode_getfattr(&xdr, res->dir_attr, res->server);
1da177e4
LT		 3747out:
3748 return status;
3749}
3750
3751/*
3752 * Decode RENAME response
3753 */
8687b63a 3754static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
1da177e4
LT		 3755{
3756 struct xdr_stream xdr;
3757 struct compound_hdr hdr;
3758 int status;
3759
3760 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3761 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3762 goto out;
3763 if ((status = decode_putfh(&xdr)) != 0)
3764 goto out;
3765 if ((status = decode_savefh(&xdr)) != 0)
3766 goto out;
3767 if ((status = decode_putfh(&xdr)) != 0)
3768 goto out;
6caf2c82
TM		 3769 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3770 goto out;
3771 /* Current FH is target directory */
3772 if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3773 goto out;
3774 if ((status = decode_restorefh(&xdr)) != 0)
3775 goto out;
3776 decode_getfattr(&xdr, res->old_fattr, res->server);
1da177e4
LT		 3777out:
3778 return status;
3779}
3780
3781/*
3782 * Decode LINK response
3783 */
8687b63a 3784static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
1da177e4
LT		 3785{
3786 struct xdr_stream xdr;
3787 struct compound_hdr hdr;
3788 int status;
3789
3790 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3791 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3792 goto out;
3793 if ((status = decode_putfh(&xdr)) != 0)
3794 goto out;
3795 if ((status = decode_savefh(&xdr)) != 0)
3796 goto out;
3797 if ((status = decode_putfh(&xdr)) != 0)
3798 goto out;
91ba2eee
TM		 3799 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3800 goto out;
3801 /*
3802 * Note order: OP_LINK leaves the directory as the current
3803 * filehandle.
3804 */
3805 if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3806 goto out;
3807 if ((status = decode_restorefh(&xdr)) != 0)
3808 goto out;
3809 decode_getfattr(&xdr, res->fattr, res->server);
1da177e4
LT		 3810out:
3811 return status;
3812}
3813
3814/*
3815 * Decode CREATE response
3816 */
8687b63a 3817static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
1da177e4
LT		 3818{
3819 struct xdr_stream xdr;
3820 struct compound_hdr hdr;
3821 int status;
3822
3823 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3824 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3825 goto out;
3826 if ((status = decode_putfh(&xdr)) != 0)
3827 goto out;
56ae19f3
TM		 3828 if ((status = decode_savefh(&xdr)) != 0)
3829 goto out;
1da177e4
LT		 3830 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3831 goto out;
3832 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3833 goto out;
56ae19f3
TM		 3834 if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3835 goto out;
3836 if ((status = decode_restorefh(&xdr)) != 0)
3837 goto out;
3838 decode_getfattr(&xdr, res->dir_fattr, res->server);
1da177e4
LT		 3839out:
3840 return status;
3841}
3842
3843/*
3844 * Decode SYMLINK response
3845 */
8687b63a 3846static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
1da177e4
LT		 3847{
3848 return nfs4_xdr_dec_create(rqstp, p, res);
3849}
3850
3851/*
3852 * Decode GETATTR response
3853 */
8687b63a 3854static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
1da177e4
LT		 3855{
3856 struct xdr_stream xdr;
3857 struct compound_hdr hdr;
3858 int status;
3859
3860 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3861 status = decode_compound_hdr(&xdr, &hdr);
3862 if (status)
3863 goto out;
3864 status = decode_putfh(&xdr);
3865 if (status)
3866 goto out;
3867 status = decode_getfattr(&xdr, res->fattr, res->server);
3868out:
3869 return status;
3870
3871}
3872
23ec6965
BF		 3873/*
3874 * Encode an SETACL request
3875 */
3876static int
8687b63a 3877nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
23ec6965
BF		 3878{
3879 struct xdr_stream xdr;
3880 struct compound_hdr hdr = {
3881 .nops = 2,
3882 };
3883 int status;
3884
3885 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3886 encode_compound_hdr(&xdr, &hdr);
3887 status = encode_putfh(&xdr, args->fh);
3888 if (status)
3889 goto out;
3890 status = encode_setacl(&xdr, args);
3891out:
3892 return status;
3893}
3894/*
3895 * Decode SETACL response
3896 */
3897static int
8687b63a 3898nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
23ec6965
BF		 3899{
3900 struct xdr_stream xdr;
3901 struct compound_hdr hdr;
3902 int status;
3903
3904 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3905 status = decode_compound_hdr(&xdr, &hdr);
3906 if (status)
3907 goto out;
3908 status = decode_putfh(&xdr);
3909 if (status)
3910 goto out;
3911 status = decode_setattr(&xdr, res);
3912out:
3913 return status;
3914}
1da177e4 3915
029d105e
BF		 3916/*
3917 * Decode GETACL response
3918 */
3919static int
8687b63a 3920nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
029d105e
BF		 3921{
3922 struct xdr_stream xdr;
3923 struct compound_hdr hdr;
3924 int status;
3925
3926 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3927 status = decode_compound_hdr(&xdr, &hdr);
3928 if (status)
3929 goto out;
3930 status = decode_putfh(&xdr);
3931 if (status)
3932 goto out;
3933 status = decode_getacl(&xdr, rqstp, acl_len);
3934
3935out:
3936 return status;
3937}
3938
1da177e4
LT		 3939/*
3940 * Decode CLOSE response
3941 */
8687b63a 3942static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
1da177e4
LT		 3943{
3944 struct xdr_stream xdr;
3945 struct compound_hdr hdr;
3946 int status;
3947
3948 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3949 status = decode_compound_hdr(&xdr, &hdr);
3950 if (status)
3951 goto out;
3952 status = decode_putfh(&xdr);
3953 if (status)
3954 goto out;
3955 status = decode_close(&xdr, res);
516a6af6
TM		 3956 if (status != 0)
3957 goto out;
3958 /*
3959 * Note: Server may do delete on close for this file
3960 * in which case the getattr call will fail with
3961 * an ESTALE error. Shouldn't be a problem,
3962 * though, since fattr->valid will remain unset.
3963 */
3964 decode_getfattr(&xdr, res->fattr, res->server);
1da177e4
LT		 3965out:
3966 return status;
3967}
3968
3969/*
3970 * Decode OPEN response
3971 */
8687b63a 3972static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
1da177e4
LT		 3973{
3974 struct xdr_stream xdr;
3975 struct compound_hdr hdr;
3976 int status;
3977
3978 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3979 status = decode_compound_hdr(&xdr, &hdr);
3980 if (status)
3981 goto out;
3982 status = decode_putfh(&xdr);
3983 if (status)
3984 goto out;
56ae19f3
TM		 3985 status = decode_savefh(&xdr);
3986 if (status)
3987 goto out;
1da177e4
LT		 3988 status = decode_open(&xdr, res);
3989 if (status)
3990 goto out;
3991 status = decode_getfh(&xdr, &res->fh);
3992 if (status)
3993 goto out;
56ae19f3
TM		 3994 if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3995 goto out;
3996 if ((status = decode_restorefh(&xdr)) != 0)
3997 goto out;
3998 decode_getfattr(&xdr, res->dir_attr, res->server);
1da177e4
LT		 3999out:
4000 return status;
4001}
4002
4003/*
4004 * Decode OPEN_CONFIRM response
4005 */
8687b63a 4006static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
1da177e4
LT		 4007{
4008 struct xdr_stream xdr;
4009 struct compound_hdr hdr;
4010 int status;
4011
4012 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4013 status = decode_compound_hdr(&xdr, &hdr);
4014 if (status)
4015 goto out;
4016 status = decode_putfh(&xdr);
4017 if (status)
4018 goto out;
4019 status = decode_open_confirm(&xdr, res);
4020out:
4021 return status;
4022}
4023
4024/*
4025 * Decode OPEN response
4026 */
8687b63a 4027static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
1da177e4
LT		 4028{
4029 struct xdr_stream xdr;
4030 struct compound_hdr hdr;
4031 int status;
4032
4033 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4034 status = decode_compound_hdr(&xdr, &hdr);
4035 if (status)
4036 goto out;
4037 status = decode_putfh(&xdr);
4038 if (status)
4039 goto out;
4040 status = decode_open(&xdr, res);
864472e9
TM		 4041 if (status)
4042 goto out;
4043 decode_getfattr(&xdr, res->f_attr, res->server);
1da177e4
LT		 4044out:
4045 return status;
4046}
4047
4048/*
4049 * Decode SETATTR response
4050 */
8687b63a 4051static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
1da177e4
LT		 4052{
4053 struct xdr_stream xdr;
4054 struct compound_hdr hdr;
4055 int status;
4056
4057 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4058 status = decode_compound_hdr(&xdr, &hdr);
4059 if (status)
4060 goto out;
4061 status = decode_putfh(&xdr);
4062 if (status)
4063 goto out;
4064 status = decode_setattr(&xdr, res);
4065 if (status)
4066 goto out;
4067 status = decode_getfattr(&xdr, res->fattr, res->server);
4068 if (status == NFS4ERR_DELAY)
4069 status = 0;
4070out:
4071 return status;
4072}
4073
4074/*
4075 * Decode LOCK response
4076 */
8687b63a 4077static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
1da177e4
LT		 4078{
4079 struct xdr_stream xdr;
4080 struct compound_hdr hdr;
4081 int status;
4082
4083 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4084 status = decode_compound_hdr(&xdr, &hdr);
4085 if (status)
4086 goto out;
4087 status = decode_putfh(&xdr);
4088 if (status)
4089 goto out;
4090 status = decode_lock(&xdr, res);
4091out:
4092 return status;
4093}
4094
4095/*
4096 * Decode LOCKT response
4097 */
8687b63a 4098static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
1da177e4
LT		 4099{
4100 struct xdr_stream xdr;
4101 struct compound_hdr hdr;
4102 int status;
4103
4104 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4105 status = decode_compound_hdr(&xdr, &hdr);
4106 if (status)
4107 goto out;
4108 status = decode_putfh(&xdr);
4109 if (status)
4110 goto out;
4111 status = decode_lockt(&xdr, res);
4112out:
4113 return status;
4114}
4115
4116/*
4117 * Decode LOCKU response
4118 */
8687b63a 4119static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
1da177e4
LT		 4120{
4121 struct xdr_stream xdr;
4122 struct compound_hdr hdr;
4123 int status;
4124
4125 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4126 status = decode_compound_hdr(&xdr, &hdr);
4127 if (status)
4128 goto out;
4129 status = decode_putfh(&xdr);
4130 if (status)
4131 goto out;
4132 status = decode_locku(&xdr, res);
4133out:
4134 return status;
4135}
4136
4137/*
4138 * Decode READLINK response
4139 */
8687b63a 4140static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
1da177e4
LT		 4141{
4142 struct xdr_stream xdr;
4143 struct compound_hdr hdr;
4144 int status;
4145
4146 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4147 status = decode_compound_hdr(&xdr, &hdr);
4148 if (status)
4149 goto out;
4150 status = decode_putfh(&xdr);
4151 if (status)
4152 goto out;
4153 status = decode_readlink(&xdr, rqstp);
4154out:
4155 return status;
4156}
4157
4158/*
4159 * Decode READDIR response
4160 */
8687b63a 4161static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
1da177e4
LT		 4162{
4163 struct xdr_stream xdr;
4164 struct compound_hdr hdr;
4165 int status;
4166
4167 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4168 status = decode_compound_hdr(&xdr, &hdr);
4169 if (status)
4170 goto out;
4171 status = decode_putfh(&xdr);
4172 if (status)
4173 goto out;
4174 status = decode_readdir(&xdr, rqstp, res);
4175out:
4176 return status;
4177}
4178
4179/*
4180 * Decode Read response
4181 */
8687b63a 4182static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
1da177e4
LT		 4183{
4184 struct xdr_stream xdr;
4185 struct compound_hdr hdr;
4186 int status;
4187
4188 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4189 status = decode_compound_hdr(&xdr, &hdr);
4190 if (status)
4191 goto out;
4192 status = decode_putfh(&xdr);
4193 if (status)
4194 goto out;
4195 status = decode_read(&xdr, rqstp, res);
4196 if (!status)
4197 status = res->count;
4198out:
4199 return status;
4200}
4201
4202/*
4203 * Decode WRITE response
4204 */
8687b63a 4205static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
1da177e4
LT		 4206{
4207 struct xdr_stream xdr;
4208 struct compound_hdr hdr;
4209 int status;
4210
4211 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4212 status = decode_compound_hdr(&xdr, &hdr);
4213 if (status)
4214 goto out;
4215 status = decode_putfh(&xdr);
4216 if (status)
4217 goto out;
4218 status = decode_write(&xdr, res);
4f9838c7
TM		 4219 if (status)
4220 goto out;
4221 decode_getfattr(&xdr, res->fattr, res->server);
1da177e4
LT		 4222 if (!status)
4223 status = res->count;
4224out:
4225 return status;
4226}
4227
4228/*
4229 * Decode COMMIT response
4230 */
8687b63a 4231static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
1da177e4
LT		 4232{
4233 struct xdr_stream xdr;
4234 struct compound_hdr hdr;
4235 int status;
4236
4237 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4238 status = decode_compound_hdr(&xdr, &hdr);
4239 if (status)
4240 goto out;
4241 status = decode_putfh(&xdr);
4242 if (status)
4243 goto out;
4244 status = decode_commit(&xdr, res);
4f9838c7
TM		 4245 if (status)
4246 goto out;
4247 decode_getfattr(&xdr, res->fattr, res->server);
1da177e4
LT		 4248out:
4249 return status;
4250}
4251
4252/*
4253 * FSINFO request
4254 */
8687b63a 4255static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
1da177e4
LT		 4256{
4257 struct xdr_stream xdr;
4258 struct compound_hdr hdr;
4259 int status;
4260
4261 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4262 status = decode_compound_hdr(&xdr, &hdr);
4263 if (!status)
4264 status = decode_putfh(&xdr);
4265 if (!status)
4266 status = decode_fsinfo(&xdr, fsinfo);
4267 if (!status)
0a8ea437 4268 status = -nfs4_stat_to_errno(hdr.status);
1da177e4
LT		 4269 return status;
4270}
4271
4272/*
4273 * PATHCONF request
4274 */
8687b63a 4275static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
1da177e4
LT		 4276{
4277 struct xdr_stream xdr;
4278 struct compound_hdr hdr;
4279 int status;
4280
4281 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4282 status = decode_compound_hdr(&xdr, &hdr);
4283 if (!status)
4284 status = decode_putfh(&xdr);
4285 if (!status)
4286 status = decode_pathconf(&xdr, pathconf);
4287 return status;
4288}
4289
4290/*
4291 * STATFS request
4292 */
8687b63a 4293static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
1da177e4
LT		 4294{
4295 struct xdr_stream xdr;
4296 struct compound_hdr hdr;
4297 int status;
4298
4299 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4300 status = decode_compound_hdr(&xdr, &hdr);
4301 if (!status)
4302 status = decode_putfh(&xdr);
4303 if (!status)
4304 status = decode_statfs(&xdr, fsstat);
4305 return status;
4306}
4307
4308/*
4309 * GETATTR_BITMAP request
4310 */
8687b63a 4311static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
1da177e4
LT		 4312{
4313 struct xdr_stream xdr;
4314 struct compound_hdr hdr;
4315 int status;
4316
4317 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4318 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4319 goto out;
4320 if ((status = decode_putfh(&xdr)) != 0)
4321 goto out;
4322 status = decode_server_caps(&xdr, res);
4323out:
4324 return status;
4325}
4326
4327/*
4328 * Decode RENEW response
4329 */
8687b63a 4330static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 4331{
4332 struct xdr_stream xdr;
4333 struct compound_hdr hdr;
4334 int status;
4335
4336 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4337 status = decode_compound_hdr(&xdr, &hdr);
4338 if (!status)
4339 status = decode_renew(&xdr);
4340 return status;
4341}
4342
4343/*
4344 * a SETCLIENTID request
4345 */
8687b63a 4346static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
adfa6f98 4347 struct nfs_client *clp)
1da177e4
LT		 4348{
4349 struct xdr_stream xdr;
4350 struct compound_hdr hdr;
4351 int status;
4352
4353 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4354 status = decode_compound_hdr(&xdr, &hdr);
4355 if (!status)
4356 status = decode_setclientid(&xdr, clp);
4357 if (!status)
0a8ea437 4358 status = -nfs4_stat_to_errno(hdr.status);
1da177e4
LT		 4359 return status;
4360}
4361
4362/*
4363 * a SETCLIENTID_CONFIRM request
4364 */
8687b63a 4365static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
1da177e4
LT		 4366{
4367 struct xdr_stream xdr;
4368 struct compound_hdr hdr;
4369 int status;
4370
4371 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4372 status = decode_compound_hdr(&xdr, &hdr);
4373 if (!status)
4374 status = decode_setclientid_confirm(&xdr);
4375 if (!status)
4376 status = decode_putrootfh(&xdr);
4377 if (!status)
4378 status = decode_fsinfo(&xdr, fsinfo);
4379 if (!status)
0a8ea437 4380 status = -nfs4_stat_to_errno(hdr.status);
1da177e4
LT		 4381 return status;
4382}
4383
4384/*
4385 * DELEGRETURN request
4386 */
8687b63a 4387static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
1da177e4
LT		 4388{
4389 struct xdr_stream xdr;
4390 struct compound_hdr hdr;
4391 int status;
4392
4393 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4394 status = decode_compound_hdr(&xdr, &hdr);
fa178f29
TM		 4395 if (status != 0)
4396 goto out;
4397 status = decode_putfh(&xdr);
4398 if (status != 0)
4399 goto out;
4400 status = decode_delegreturn(&xdr);
4401 decode_getfattr(&xdr, res->fattr, res->server);
4402out:
1da177e4
LT		 4403 return status;
4404}
4405
683b57b4
TM		 4406/*
4407 * FS_LOCATIONS request
4408 */
8687b63a 4409static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
683b57b4
TM		 4410{
4411 struct xdr_stream xdr;
4412 struct compound_hdr hdr;
4413 int status;
4414
4415 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4416 status = decode_compound_hdr(&xdr, &hdr);
4417 if (status != 0)
4418 goto out;
4419 if ((status = decode_putfh(&xdr)) != 0)
4420 goto out;
4421 if ((status = decode_lookup(&xdr)) != 0)
4422 goto out;
4423 xdr_enter_page(&xdr, PAGE_SIZE);
4424 status = decode_getfattr(&xdr, &res->fattr, res->server);
4425out:
4426 return status;
4427}
4428
0dbb4c67 4429__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
1da177e4
LT		 4430{
4431 uint32_t bitmap[2] = {0};
4432 uint32_t len;
4433
4434 if (!*p++) {
4435 if (!*p)
4436 return ERR_PTR(-EAGAIN);
4437 entry->eof = 1;
4438 return ERR_PTR(-EBADCOOKIE);
4439 }
4440
4441 entry->prev_cookie = entry->cookie;
4442 p = xdr_decode_hyper(p, &entry->cookie);
4443 entry->len = ntohl(*p++);
4444 entry->name = (const char *) p;
4445 p += XDR_QUADLEN(entry->len);
4446
4447 /*
4448 * In case the server doesn't return an inode number,
4449 * we fake one here. (We don't use inode number 0,
4450 * since glibc seems to choke on it...)
4451 */
4452 entry->ino = 1;
4453
4454 len = ntohl(*p++); /* bitmap length */
4455 if (len-- > 0) {
4456 bitmap[0] = ntohl(*p++);
4457 if (len-- > 0) {
4458 bitmap[1] = ntohl(*p++);
4459 p += len;
4460 }
4461 }
4462 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4463 if (len > 0) {
97d312d0
MN		 4464 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4465 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4466 /* Ignore the return value of rdattr_error for now */
4467 p++;
4468 len--;
4469 }
1da177e4
LT		 4470 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4471 xdr_decode_hyper(p, &entry->ino);
4472 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4473 xdr_decode_hyper(p, &entry->ino);
4474 p += len;
4475 }
4476
4477 entry->eof = !p[0] && p[1];
4478 return p;
4479}
4480
4481/*
4482 * We need to translate between nfs status return values and
4483 * the local errno values which may not be the same.
4484 */
4485static struct {
4486 int stat;
4487 int errno;
4488} nfs_errtbl[] = {
4489 { NFS4_OK, 0 },
4490 { NFS4ERR_PERM, EPERM },
4491 { NFS4ERR_NOENT, ENOENT },
4492 { NFS4ERR_IO, errno_NFSERR_IO },
4493 { NFS4ERR_NXIO, ENXIO },
4494 { NFS4ERR_ACCESS, EACCES },
4495 { NFS4ERR_EXIST, EEXIST },
4496 { NFS4ERR_XDEV, EXDEV },
4497 { NFS4ERR_NOTDIR, ENOTDIR },
4498 { NFS4ERR_ISDIR, EISDIR },
4499 { NFS4ERR_INVAL, EINVAL },
4500 { NFS4ERR_FBIG, EFBIG },
4501 { NFS4ERR_NOSPC, ENOSPC },
4502 { NFS4ERR_ROFS, EROFS },
4503 { NFS4ERR_MLINK, EMLINK },
4504 { NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
4505 { NFS4ERR_NOTEMPTY, ENOTEMPTY },
4506 { NFS4ERR_DQUOT, EDQUOT },
4507 { NFS4ERR_STALE, ESTALE },
4508 { NFS4ERR_BADHANDLE, EBADHANDLE },
6ebf3656
MN		 4509 { NFS4ERR_BADOWNER, EINVAL },
4510 { NFS4ERR_BADNAME, EINVAL },
1da177e4
LT		 4511 { NFS4ERR_BAD_COOKIE, EBADCOOKIE },
4512 { NFS4ERR_NOTSUPP, ENOTSUPP },
4513 { NFS4ERR_TOOSMALL, ETOOSMALL },
4514 { NFS4ERR_SERVERFAULT, ESERVERFAULT },
4515 { NFS4ERR_BADTYPE, EBADTYPE },
4516 { NFS4ERR_LOCKED, EAGAIN },
4517 { NFS4ERR_RESOURCE, EREMOTEIO },
4518 { NFS4ERR_SYMLINK, ELOOP },
4519 { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
4520 { NFS4ERR_DEADLOCK, EDEADLK },
4521 { NFS4ERR_WRONGSEC, EPERM }, /* FIXME: this needs
4522 * to be handled by a
4523 * middle-layer.
4524 */
4525 { -1, EIO }
4526};
4527
4528/*
4529 * Convert an NFS error code to a local one.
4530 * This one is used jointly by NFSv2 and NFSv3.
4531 */
4532static int
0a8ea437 4533nfs4_stat_to_errno(int stat)
1da177e4
LT		 4534{
4535 int i;
4536 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4537 if (nfs_errtbl[i].stat == stat)
4538 return nfs_errtbl[i].errno;
4539 }
4540 if (stat <= 10000 || stat > 10100) {
4541 /* The server is looney tunes. */
4542 return ESERVERFAULT;
4543 }
4544 /* If we cannot translate the error, the recovery routines should
4545 * handle it.
4546 * Note: remaining NFSv4 error codes have values > 10000, so should
4547 * not conflict with native Linux error codes.
4548 */
4549 return stat;
4550}
4551
1da177e4
LT		 4552#define PROC(proc, argtype, restype) \
4553[NFSPROC4_CLNT_##proc] = { \
4554 .p_proc = NFSPROC4_COMPOUND, \
4555 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4556 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
2bea90d4
CL		 4557 .p_arglen = NFS4_##argtype##_sz, \
4558 .p_replen = NFS4_##restype##_sz, \
cc0175c1
CL		 4559 .p_statidx = NFSPROC4_CLNT_##proc, \
4560 .p_name = #proc, \
1da177e4
LT		 4561 }
4562
4563struct rpc_procinfo nfs4_procedures[] = {
4564 PROC(READ, enc_read, dec_read),
4565 PROC(WRITE, enc_write, dec_write),
4566 PROC(COMMIT, enc_commit, dec_commit),
4567 PROC(OPEN, enc_open, dec_open),
4568 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4569 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4570 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4571 PROC(CLOSE, enc_close, dec_close),
4572 PROC(SETATTR, enc_setattr, dec_setattr),
4573 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4574 PROC(RENEW, enc_renew, dec_renew),
4575 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4576 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4577 PROC(LOCK, enc_lock, dec_lock),
4578 PROC(LOCKT, enc_lockt, dec_lockt),
4579 PROC(LOCKU, enc_locku, dec_locku),
4580 PROC(ACCESS, enc_access, dec_access),
4581 PROC(GETATTR, enc_getattr, dec_getattr),
4582 PROC(LOOKUP, enc_lookup, dec_lookup),
4583 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4584 PROC(REMOVE, enc_remove, dec_remove),
4585 PROC(RENAME, enc_rename, dec_rename),
4586 PROC(LINK, enc_link, dec_link),
4587 PROC(SYMLINK, enc_symlink, dec_symlink),
4588 PROC(CREATE, enc_create, dec_create),
4589 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4590 PROC(STATFS, enc_statfs, dec_statfs),
4591 PROC(READLINK, enc_readlink, dec_readlink),
4592 PROC(READDIR, enc_readdir, dec_readdir),
4593 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4594 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
029d105e 4595 PROC(GETACL, enc_getacl, dec_getacl),
23ec6965 4596 PROC(SETACL, enc_setacl, dec_setacl),
683b57b4 4597 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
1da177e4
LT		 4598};
4599
4600struct rpc_version nfs_version4 = {
4601 .number = 4,
e8c96f8c 4602 .nrprocs = ARRAY_SIZE(nfs4_procedures),
1da177e4
LT		 4603 .procs = nfs4_procedures
4604};
4605
4606/*
4607 * Local variables:
4608 * c-basic-offset: 8
4609 * End:
4610 */
Linux kernel - Deliverables
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