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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / fs / nfs / nfs4xdr.c
blob51dd3804866f1575adc3ceeda8a47162796e1bbe
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/slab.h>
42 #include <linux/utsname.h>
43 #include <linux/errno.h>
44 #include <linux/string.h>
45 #include <linux/in.h>
46 #include <linux/pagemap.h>
47 #include <linux/proc_fs.h>
48 #include <linux/kdev_t.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55
56 #define NFSDBG_FACILITY NFSDBG_XDR
57
58 /* Mapping from NFS error code to "errno" error code. */
59 #define errno_NFSERR_IO EIO
60
61 static int nfs4_stat_to_errno(int);
62
63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64 #ifdef DEBUG
65 #define NFS4_MAXTAGLEN 20
66 #else
67 #define NFS4_MAXTAGLEN 0
68 #endif
69
70 /* lock,open owner id:
71 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
72 */
73 #define open_owner_id_maxsz (1 + 4)
74 #define lock_owner_id_maxsz (1 + 4)
75 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
76 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
77 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define op_encode_hdr_maxsz (1)
79 #define op_decode_hdr_maxsz (2)
80 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
81 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
83 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
85 (NFS4_FHSIZE >> 2))
86 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
87 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
88 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
91 ((3+NFS4_FHSIZE) >> 2))
92 #define nfs4_fattr_bitmap_maxsz 3
93 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
94 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
95 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
96 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
97 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 /* This is based on getfattr, which uses the most attributes: */
99 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
100 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
101 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
102 nfs4_fattr_value_maxsz)
103 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
104 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
105 1 + 2 + 1 + \
106 nfs4_owner_maxsz + \
107 nfs4_group_maxsz + \
108 4 + 4)
109 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
110 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
111 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_fsinfo_maxsz (op_encode_hdr_maxsz + 2)
114 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
115 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
116 #define decode_renew_maxsz (op_decode_hdr_maxsz)
117 #define encode_setclientid_maxsz \
118 (op_encode_hdr_maxsz + \
119 4 /*server->ip_addr*/ + \
120 1 /*Netid*/ + \
121 6 /*uaddr*/ + \
122 6 + (NFS4_VERIFIER_SIZE >> 2))
123 #define decode_setclientid_maxsz \
124 (op_decode_hdr_maxsz + \
125 2 + \
126 1024) /* large value for CLID_INUSE */
127 #define encode_setclientid_confirm_maxsz \
128 (op_encode_hdr_maxsz + \
129 3 + (NFS4_VERIFIER_SIZE >> 2))
130 #define decode_setclientid_confirm_maxsz \
131 (op_decode_hdr_maxsz)
132 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
133 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
134 #define encode_share_access_maxsz \
135 (2)
136 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
137 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
138 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
139 #define encode_open_maxsz (op_encode_hdr_maxsz + \
140 2 + encode_share_access_maxsz + 2 + \
141 open_owner_id_maxsz + \
142 encode_opentype_maxsz + \
143 encode_claim_null_maxsz)
144 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
145 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
146 decode_ace_maxsz)
147 #define decode_change_info_maxsz (5)
148 #define decode_open_maxsz (op_decode_hdr_maxsz + \
149 decode_stateid_maxsz + \
150 decode_change_info_maxsz + 1 + \
151 nfs4_fattr_bitmap_maxsz + \
152 decode_delegation_maxsz)
153 #define encode_open_confirm_maxsz \
154 (op_encode_hdr_maxsz + \
155 encode_stateid_maxsz + 1)
156 #define decode_open_confirm_maxsz \
157 (op_decode_hdr_maxsz + \
158 decode_stateid_maxsz)
159 #define encode_open_downgrade_maxsz \
160 (op_encode_hdr_maxsz + \
161 encode_stateid_maxsz + 1 + \
162 encode_share_access_maxsz)
163 #define decode_open_downgrade_maxsz \
164 (op_decode_hdr_maxsz + \
165 decode_stateid_maxsz)
166 #define encode_close_maxsz (op_encode_hdr_maxsz + \
167 1 + encode_stateid_maxsz)
168 #define decode_close_maxsz (op_decode_hdr_maxsz + \
169 decode_stateid_maxsz)
170 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
171 encode_stateid_maxsz + \
172 encode_attrs_maxsz)
173 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
174 nfs4_fattr_bitmap_maxsz)
175 #define encode_read_maxsz (op_encode_hdr_maxsz + \
176 encode_stateid_maxsz + 3)
177 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
178 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
179 2 + encode_verifier_maxsz + 5)
180 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
181 decode_verifier_maxsz)
182 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
183 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
184 #define encode_write_maxsz (op_encode_hdr_maxsz + \
185 encode_stateid_maxsz + 4)
186 #define decode_write_maxsz (op_decode_hdr_maxsz + \
187 2 + decode_verifier_maxsz)
188 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
189 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
190 decode_verifier_maxsz)
191 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
192 nfs4_name_maxsz)
193 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
194 2 * nfs4_name_maxsz)
195 #define decode_rename_maxsz (op_decode_hdr_maxsz + 5 + 5)
196 #define encode_link_maxsz (op_encode_hdr_maxsz + \
197 nfs4_name_maxsz)
198 #define decode_link_maxsz (op_decode_hdr_maxsz + 5)
199 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
200 7 + \
201 1 + encode_stateid_maxsz + 8)
202 #define decode_lock_denied_maxsz \
203 (8 + decode_lockowner_maxsz)
204 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
205 decode_lock_denied_maxsz)
206 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 12)
207 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
208 decode_lock_denied_maxsz)
209 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
210 encode_stateid_maxsz + \
211 4)
212 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
213 decode_stateid_maxsz)
214 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
215 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
216 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
217 1 + nfs4_name_maxsz + \
218 1 + \
219 nfs4_fattr_maxsz)
220 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
221 #define encode_create_maxsz (op_encode_hdr_maxsz + \
222 1 + 2 + nfs4_name_maxsz + \
223 encode_attrs_maxsz)
224 #define decode_create_maxsz (op_decode_hdr_maxsz + \
225 decode_change_info_maxsz + \
226 nfs4_fattr_bitmap_maxsz)
227 #define encode_statfs_maxsz (encode_getattr_maxsz)
228 #define decode_statfs_maxsz (decode_getattr_maxsz)
229 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
230 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
231 #define encode_getacl_maxsz (encode_getattr_maxsz)
232 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
233 nfs4_fattr_bitmap_maxsz + 1)
234 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
235 encode_stateid_maxsz + 3)
236 #define decode_setacl_maxsz (decode_setattr_maxsz)
237 #define encode_fs_locations_maxsz \
238 (encode_getattr_maxsz)
239 #define decode_fs_locations_maxsz \
240 (0)
241 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
242 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
243 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
244 encode_putfh_maxsz + \
245 encode_read_maxsz)
246 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
247 decode_putfh_maxsz + \
248 decode_read_maxsz)
249 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
250 encode_putfh_maxsz + \
251 encode_readlink_maxsz)
252 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
253 decode_putfh_maxsz + \
254 decode_readlink_maxsz)
255 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
256 encode_putfh_maxsz + \
257 encode_readdir_maxsz)
258 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
259 decode_putfh_maxsz + \
260 decode_readdir_maxsz)
261 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
262 encode_putfh_maxsz + \
263 encode_write_maxsz + \
264 encode_getattr_maxsz)
265 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
266 decode_putfh_maxsz + \
267 decode_write_maxsz + \
268 decode_getattr_maxsz)
269 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
270 encode_putfh_maxsz + \
271 encode_commit_maxsz + \
272 encode_getattr_maxsz)
273 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
274 decode_putfh_maxsz + \
275 decode_commit_maxsz + \
276 decode_getattr_maxsz)
277 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
278 encode_putfh_maxsz + \
279 encode_savefh_maxsz + \
280 encode_open_maxsz + \
281 encode_getfh_maxsz + \
282 encode_getattr_maxsz + \
283 encode_restorefh_maxsz + \
284 encode_getattr_maxsz)
285 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
286 decode_putfh_maxsz + \
287 decode_savefh_maxsz + \
288 decode_open_maxsz + \
289 decode_getfh_maxsz + \
290 decode_getattr_maxsz + \
291 decode_restorefh_maxsz + \
292 decode_getattr_maxsz)
293 #define NFS4_enc_open_confirm_sz \
294 (compound_encode_hdr_maxsz + \
295 encode_putfh_maxsz + \
296 encode_open_confirm_maxsz)
297 #define NFS4_dec_open_confirm_sz \
298 (compound_decode_hdr_maxsz + \
299 decode_putfh_maxsz + \
300 decode_open_confirm_maxsz)
301 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
302 encode_putfh_maxsz + \
303 encode_open_maxsz + \
304 encode_getattr_maxsz)
305 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
306 decode_putfh_maxsz + \
307 decode_open_maxsz + \
308 decode_getattr_maxsz)
309 #define NFS4_enc_open_downgrade_sz \
310 (compound_encode_hdr_maxsz + \
311 encode_putfh_maxsz + \
312 encode_open_downgrade_maxsz + \
313 encode_getattr_maxsz)
314 #define NFS4_dec_open_downgrade_sz \
315 (compound_decode_hdr_maxsz + \
316 decode_putfh_maxsz + \
317 decode_open_downgrade_maxsz + \
318 decode_getattr_maxsz)
319 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
320 encode_putfh_maxsz + \
321 encode_close_maxsz + \
322 encode_getattr_maxsz)
323 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
324 decode_putfh_maxsz + \
325 decode_close_maxsz + \
326 decode_getattr_maxsz)
327 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
328 encode_putfh_maxsz + \
329 encode_setattr_maxsz + \
330 encode_getattr_maxsz)
331 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
332 decode_putfh_maxsz + \
333 decode_setattr_maxsz + \
334 decode_getattr_maxsz)
335 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
336 encode_putfh_maxsz + \
337 encode_fsinfo_maxsz)
338 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
339 decode_putfh_maxsz + \
340 decode_fsinfo_maxsz)
341 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
342 encode_renew_maxsz)
343 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
344 decode_renew_maxsz)
345 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
346 encode_setclientid_maxsz)
347 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
348 decode_setclientid_maxsz)
349 #define NFS4_enc_setclientid_confirm_sz \
350 (compound_encode_hdr_maxsz + \
351 encode_setclientid_confirm_maxsz + \
352 encode_putrootfh_maxsz + \
353 encode_fsinfo_maxsz)
354 #define NFS4_dec_setclientid_confirm_sz \
355 (compound_decode_hdr_maxsz + \
356 decode_setclientid_confirm_maxsz + \
357 decode_putrootfh_maxsz + \
358 decode_fsinfo_maxsz)
359 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
360 encode_putfh_maxsz + \
361 encode_lock_maxsz)
362 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
363 decode_putfh_maxsz + \
364 decode_lock_maxsz)
365 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
366 encode_putfh_maxsz + \
367 encode_lockt_maxsz)
368 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
369 decode_putfh_maxsz + \
370 decode_lockt_maxsz)
371 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
372 encode_putfh_maxsz + \
373 encode_locku_maxsz)
374 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
375 decode_putfh_maxsz + \
376 decode_locku_maxsz)
377 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
378 encode_putfh_maxsz + \
379 encode_access_maxsz + \
380 encode_getattr_maxsz)
381 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
382 decode_putfh_maxsz + \
383 decode_access_maxsz + \
384 decode_getattr_maxsz)
385 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
386 encode_putfh_maxsz + \
387 encode_getattr_maxsz)
388 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
389 decode_putfh_maxsz + \
390 decode_getattr_maxsz)
391 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
392 encode_putfh_maxsz + \
393 encode_lookup_maxsz + \
394 encode_getattr_maxsz + \
395 encode_getfh_maxsz)
396 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
397 decode_putfh_maxsz + \
398 decode_lookup_maxsz + \
399 decode_getattr_maxsz + \
400 decode_getfh_maxsz)
401 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
402 encode_putrootfh_maxsz + \
403 encode_getattr_maxsz + \
404 encode_getfh_maxsz)
405 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
406 decode_putrootfh_maxsz + \
407 decode_getattr_maxsz + \
408 decode_getfh_maxsz)
409 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
410 encode_putfh_maxsz + \
411 encode_remove_maxsz + \
412 encode_getattr_maxsz)
413 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
414 decode_putfh_maxsz + \
415 op_decode_hdr_maxsz + 5 + \
416 decode_getattr_maxsz)
417 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
418 encode_putfh_maxsz + \
419 encode_savefh_maxsz + \
420 encode_putfh_maxsz + \
421 encode_rename_maxsz + \
422 encode_getattr_maxsz + \
423 encode_restorefh_maxsz + \
424 encode_getattr_maxsz)
425 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
426 decode_putfh_maxsz + \
427 decode_savefh_maxsz + \
428 decode_putfh_maxsz + \
429 decode_rename_maxsz + \
430 decode_getattr_maxsz + \
431 decode_restorefh_maxsz + \
432 decode_getattr_maxsz)
433 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
434 encode_putfh_maxsz + \
435 encode_savefh_maxsz + \
436 encode_putfh_maxsz + \
437 encode_link_maxsz + \
438 decode_getattr_maxsz + \
439 encode_restorefh_maxsz + \
440 decode_getattr_maxsz)
441 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
442 decode_putfh_maxsz + \
443 decode_savefh_maxsz + \
444 decode_putfh_maxsz + \
445 decode_link_maxsz + \
446 decode_getattr_maxsz + \
447 decode_restorefh_maxsz + \
448 decode_getattr_maxsz)
449 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
450 encode_putfh_maxsz + \
451 encode_symlink_maxsz + \
452 encode_getattr_maxsz + \
453 encode_getfh_maxsz)
454 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
455 decode_putfh_maxsz + \
456 decode_symlink_maxsz + \
457 decode_getattr_maxsz + \
458 decode_getfh_maxsz)
459 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
460 encode_putfh_maxsz + \
461 encode_savefh_maxsz + \
462 encode_create_maxsz + \
463 encode_getfh_maxsz + \
464 encode_getattr_maxsz + \
465 encode_restorefh_maxsz + \
466 encode_getattr_maxsz)
467 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
468 decode_putfh_maxsz + \
469 decode_savefh_maxsz + \
470 decode_create_maxsz + \
471 decode_getfh_maxsz + \
472 decode_getattr_maxsz + \
473 decode_restorefh_maxsz + \
474 decode_getattr_maxsz)
475 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
476 encode_putfh_maxsz + \
477 encode_getattr_maxsz)
478 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
479 decode_putfh_maxsz + \
480 decode_getattr_maxsz)
481 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
482 encode_putfh_maxsz + \
483 encode_statfs_maxsz)
484 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
485 decode_putfh_maxsz + \
486 decode_statfs_maxsz)
487 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
488 encode_putfh_maxsz + \
489 encode_getattr_maxsz)
490 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
491 decode_putfh_maxsz + \
492 decode_getattr_maxsz)
493 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
494 encode_putfh_maxsz + \
495 encode_delegreturn_maxsz + \
496 encode_getattr_maxsz)
497 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
498 decode_delegreturn_maxsz + \
499 decode_getattr_maxsz)
500 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
501 encode_putfh_maxsz + \
502 encode_getacl_maxsz)
503 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
504 decode_putfh_maxsz + \
505 decode_getacl_maxsz)
506 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
507 encode_putfh_maxsz + \
508 encode_setacl_maxsz)
509 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
510 decode_putfh_maxsz + \
511 decode_setacl_maxsz)
512 #define NFS4_enc_fs_locations_sz \
513 (compound_encode_hdr_maxsz + \
514 encode_putfh_maxsz + \
515 encode_lookup_maxsz + \
516 encode_fs_locations_maxsz)
517 #define NFS4_dec_fs_locations_sz \
518 (compound_decode_hdr_maxsz + \
519 decode_putfh_maxsz + \
520 decode_lookup_maxsz + \
521 decode_fs_locations_maxsz)
522
523 static struct {
524 unsigned int mode;
525 unsigned int nfs2type;
526 } nfs_type2fmt[] = {
527 { 0, NFNON },
528 { S_IFREG, NFREG },
529 { S_IFDIR, NFDIR },
530 { S_IFBLK, NFBLK },
531 { S_IFCHR, NFCHR },
532 { S_IFLNK, NFLNK },
533 { S_IFSOCK, NFSOCK },
534 { S_IFIFO, NFFIFO },
535 { 0, NFNON },
536 { 0, NFNON },
537 };
538
539 struct compound_hdr {
540 int32_t status;
541 uint32_t nops;
542 uint32_t taglen;
543 char * tag;
544 };
545
546 /*
547 * START OF "GENERIC" ENCODE ROUTINES.
548 * These may look a little ugly since they are imported from a "generic"
549 * set of XDR encode/decode routines which are intended to be shared by
550 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
551 *
552 * If the pain of reading these is too great, it should be a straightforward
553 * task to translate them into Linux-specific versions which are more
554 * consistent with the style used in NFSv2/v3...
555 */
556 #define WRITE32(n) *p++ = htonl(n)
557 #define WRITE64(n) do { \
558 *p++ = htonl((uint32_t)((n) >> 32)); \
559 *p++ = htonl((uint32_t)(n)); \
560 } while (0)
561 #define WRITEMEM(ptr,nbytes) do { \
562 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
563 } while (0)
564
565 #define RESERVE_SPACE(nbytes) do { \
566 p = xdr_reserve_space(xdr, nbytes); \
567 BUG_ON(!p); \
568 } while (0)
569
570 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
571 {
572 __be32 *p;
573
574 p = xdr_reserve_space(xdr, 4 + len);
575 BUG_ON(p == NULL);
576 xdr_encode_opaque(p, str, len);
577 }
578
579 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
580 {
581 __be32 *p;
582
583 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
584 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
585 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
586 WRITE32(hdr->taglen);
587 WRITEMEM(hdr->tag, hdr->taglen);
588 WRITE32(NFS4_MINOR_VERSION);
589 WRITE32(hdr->nops);
590 return 0;
591 }
592
593 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
594 {
595 __be32 *p;
596
597 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
598 BUG_ON(p == NULL);
599 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
600 }
601
602 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
603 {
604 char owner_name[IDMAP_NAMESZ];
605 char owner_group[IDMAP_NAMESZ];
606 int owner_namelen = 0;
607 int owner_grouplen = 0;
608 __be32 *p;
609 __be32 *q;
610 int len;
611 uint32_t bmval0 = 0;
612 uint32_t bmval1 = 0;
613 int status;
614
615 /*
616 * We reserve enough space to write the entire attribute buffer at once.
617 * In the worst-case, this would be
618 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
619 * = 36 bytes, plus any contribution from variable-length fields
620 * such as owner/group.
621 */
622 len = 16;
623
624 /* Sigh */
625 if (iap->ia_valid & ATTR_SIZE)
626 len += 8;
627 if (iap->ia_valid & ATTR_MODE)
628 len += 4;
629 if (iap->ia_valid & ATTR_UID) {
630 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
631 if (owner_namelen < 0) {
632 dprintk("nfs: couldn't resolve uid %d to string\n",
633 iap->ia_uid);
634 /* XXX */
635 strcpy(owner_name, "nobody");
636 owner_namelen = sizeof("nobody") - 1;
637 /* goto out; */
638 }
639 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
640 }
641 if (iap->ia_valid & ATTR_GID) {
642 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
643 if (owner_grouplen < 0) {
644 dprintk("nfs: couldn't resolve gid %d to string\n",
645 iap->ia_gid);
646 strcpy(owner_group, "nobody");
647 owner_grouplen = sizeof("nobody") - 1;
648 /* goto out; */
649 }
650 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
651 }
652 if (iap->ia_valid & ATTR_ATIME_SET)
653 len += 16;
654 else if (iap->ia_valid & ATTR_ATIME)
655 len += 4;
656 if (iap->ia_valid & ATTR_MTIME_SET)
657 len += 16;
658 else if (iap->ia_valid & ATTR_MTIME)
659 len += 4;
660 RESERVE_SPACE(len);
661
662 /*
663 * We write the bitmap length now, but leave the bitmap and the attribute
664 * buffer length to be backfilled at the end of this routine.
665 */
666 WRITE32(2);
667 q = p;
668 p += 3;
669
670 if (iap->ia_valid & ATTR_SIZE) {
671 bmval0 |= FATTR4_WORD0_SIZE;
672 WRITE64(iap->ia_size);
673 }
674 if (iap->ia_valid & ATTR_MODE) {
675 bmval1 |= FATTR4_WORD1_MODE;
676 WRITE32(iap->ia_mode & S_IALLUGO);
677 }
678 if (iap->ia_valid & ATTR_UID) {
679 bmval1 |= FATTR4_WORD1_OWNER;
680 WRITE32(owner_namelen);
681 WRITEMEM(owner_name, owner_namelen);
682 }
683 if (iap->ia_valid & ATTR_GID) {
684 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
685 WRITE32(owner_grouplen);
686 WRITEMEM(owner_group, owner_grouplen);
687 }
688 if (iap->ia_valid & ATTR_ATIME_SET) {
689 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
690 WRITE32(NFS4_SET_TO_CLIENT_TIME);
691 WRITE32(0);
692 WRITE32(iap->ia_mtime.tv_sec);
693 WRITE32(iap->ia_mtime.tv_nsec);
694 }
695 else if (iap->ia_valid & ATTR_ATIME) {
696 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
697 WRITE32(NFS4_SET_TO_SERVER_TIME);
698 }
699 if (iap->ia_valid & ATTR_MTIME_SET) {
700 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
701 WRITE32(NFS4_SET_TO_CLIENT_TIME);
702 WRITE32(0);
703 WRITE32(iap->ia_mtime.tv_sec);
704 WRITE32(iap->ia_mtime.tv_nsec);
705 }
706 else if (iap->ia_valid & ATTR_MTIME) {
707 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
708 WRITE32(NFS4_SET_TO_SERVER_TIME);
709 }
710
711 /*
712 * Now we backfill the bitmap and the attribute buffer length.
713 */
714 if (len != ((char *)p - (char *)q) + 4) {
715 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
716 len, ((char *)p - (char *)q) + 4);
717 BUG();
718 }
719 len = (char *)p - (char *)q - 12;
720 *q++ = htonl(bmval0);
721 *q++ = htonl(bmval1);
722 *q++ = htonl(len);
723
724 status = 0;
725 /* out: */
726 return status;
727 }
728
729 static int encode_access(struct xdr_stream *xdr, u32 access)
730 {
731 __be32 *p;
732
733 RESERVE_SPACE(8);
734 WRITE32(OP_ACCESS);
735 WRITE32(access);
736
737 return 0;
738 }
739
740 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
741 {
742 __be32 *p;
743
744 RESERVE_SPACE(8+NFS4_STATEID_SIZE);
745 WRITE32(OP_CLOSE);
746 WRITE32(arg->seqid->sequence->counter);
747 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
748
749 return 0;
750 }
751
752 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
753 {
754 __be32 *p;
755
756 RESERVE_SPACE(16);
757 WRITE32(OP_COMMIT);
758 WRITE64(args->offset);
759 WRITE32(args->count);
760
761 return 0;
762 }
763
764 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
765 {
766 __be32 *p;
767
768 RESERVE_SPACE(8);
769 WRITE32(OP_CREATE);
770 WRITE32(create->ftype);
771
772 switch (create->ftype) {
773 case NF4LNK:
774 RESERVE_SPACE(4);
775 WRITE32(create->u.symlink.len);
776 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
777 break;
778
779 case NF4BLK: case NF4CHR:
780 RESERVE_SPACE(8);
781 WRITE32(create->u.device.specdata1);
782 WRITE32(create->u.device.specdata2);
783 break;
784
785 default:
786 break;
787 }
788
789 RESERVE_SPACE(4 + create->name->len);
790 WRITE32(create->name->len);
791 WRITEMEM(create->name->name, create->name->len);
792
793 return encode_attrs(xdr, create->attrs, create->server);
794 }
795
796 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
797 {
798 __be32 *p;
799
800 RESERVE_SPACE(12);
801 WRITE32(OP_GETATTR);
802 WRITE32(1);
803 WRITE32(bitmap);
804 return 0;
805 }
806
807 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
808 {
809 __be32 *p;
810
811 RESERVE_SPACE(16);
812 WRITE32(OP_GETATTR);
813 WRITE32(2);
814 WRITE32(bm0);
815 WRITE32(bm1);
816 return 0;
817 }
818
819 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
820 {
821 return encode_getattr_two(xdr,
822 bitmask[0] & nfs4_fattr_bitmap[0],
823 bitmask[1] & nfs4_fattr_bitmap[1]);
824 }
825
826 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
827 {
828 return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
829 bitmask[1] & nfs4_fsinfo_bitmap[1]);
830 }
831
832 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
833 {
834 return encode_getattr_two(xdr,
835 bitmask[0] & nfs4_fs_locations_bitmap[0],
836 bitmask[1] & nfs4_fs_locations_bitmap[1]);
837 }
838
839 static int encode_getfh(struct xdr_stream *xdr)
840 {
841 __be32 *p;
842
843 RESERVE_SPACE(4);
844 WRITE32(OP_GETFH);
845
846 return 0;
847 }
848
849 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
850 {
851 __be32 *p;
852
853 RESERVE_SPACE(8 + name->len);
854 WRITE32(OP_LINK);
855 WRITE32(name->len);
856 WRITEMEM(name->name, name->len);
857
858 return 0;
859 }
860
861 static inline int nfs4_lock_type(struct file_lock *fl, int block)
862 {
863 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
864 return block ? NFS4_READW_LT : NFS4_READ_LT;
865 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
866 }
867
868 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
869 {
870 if (fl->fl_end == OFFSET_MAX)
871 return ~(uint64_t)0;
872 return fl->fl_end - fl->fl_start + 1;
873 }
874
875 /*
876 * opcode,type,reclaim,offset,length,new_lock_owner = 32
877 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
878 */
879 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
880 {
881 __be32 *p;
882
883 RESERVE_SPACE(32);
884 WRITE32(OP_LOCK);
885 WRITE32(nfs4_lock_type(args->fl, args->block));
886 WRITE32(args->reclaim);
887 WRITE64(args->fl->fl_start);
888 WRITE64(nfs4_lock_length(args->fl));
889 WRITE32(args->new_lock_owner);
890 if (args->new_lock_owner){
891 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
892 WRITE32(args->open_seqid->sequence->counter);
893 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
894 WRITE32(args->lock_seqid->sequence->counter);
895 WRITE64(args->lock_owner.clientid);
896 WRITE32(16);
897 WRITEMEM("lock id:", 8);
898 WRITE64(args->lock_owner.id);
899 }
900 else {
901 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
902 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
903 WRITE32(args->lock_seqid->sequence->counter);
904 }
905
906 return 0;
907 }
908
909 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
910 {
911 __be32 *p;
912
913 RESERVE_SPACE(52);
914 WRITE32(OP_LOCKT);
915 WRITE32(nfs4_lock_type(args->fl, 0));
916 WRITE64(args->fl->fl_start);
917 WRITE64(nfs4_lock_length(args->fl));
918 WRITE64(args->lock_owner.clientid);
919 WRITE32(16);
920 WRITEMEM("lock id:", 8);
921 WRITE64(args->lock_owner.id);
922
923 return 0;
924 }
925
926 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
927 {
928 __be32 *p;
929
930 RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
931 WRITE32(OP_LOCKU);
932 WRITE32(nfs4_lock_type(args->fl, 0));
933 WRITE32(args->seqid->sequence->counter);
934 WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
935 WRITE64(args->fl->fl_start);
936 WRITE64(nfs4_lock_length(args->fl));
937
938 return 0;
939 }
940
941 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
942 {
943 int len = name->len;
944 __be32 *p;
945
946 RESERVE_SPACE(8 + len);
947 WRITE32(OP_LOOKUP);
948 WRITE32(len);
949 WRITEMEM(name->name, len);
950
951 return 0;
952 }
953
954 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
955 {
956 __be32 *p;
957
958 RESERVE_SPACE(8);
959 switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
960 case FMODE_READ:
961 WRITE32(NFS4_SHARE_ACCESS_READ);
962 break;
963 case FMODE_WRITE:
964 WRITE32(NFS4_SHARE_ACCESS_WRITE);
965 break;
966 case FMODE_READ|FMODE_WRITE:
967 WRITE32(NFS4_SHARE_ACCESS_BOTH);
968 break;
969 default:
970 BUG();
971 }
972 WRITE32(0); /* for linux, share_deny = 0 always */
973 }
974
975 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
976 {
977 __be32 *p;
978 /*
979 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
980 * owner 4 = 32
981 */
982 RESERVE_SPACE(8);
983 WRITE32(OP_OPEN);
984 WRITE32(arg->seqid->sequence->counter);
985 encode_share_access(xdr, arg->open_flags);
986 RESERVE_SPACE(28);
987 WRITE64(arg->clientid);
988 WRITE32(16);
989 WRITEMEM("open id:", 8);
990 WRITE64(arg->id);
991 }
992
993 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
994 {
995 __be32 *p;
996
997 RESERVE_SPACE(4);
998 switch(arg->open_flags & O_EXCL) {
999 case 0:
1000 WRITE32(NFS4_CREATE_UNCHECKED);
1001 encode_attrs(xdr, arg->u.attrs, arg->server);
1002 break;
1003 default:
1004 WRITE32(NFS4_CREATE_EXCLUSIVE);
1005 encode_nfs4_verifier(xdr, &arg->u.verifier);
1006 }
1007 }
1008
1009 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1010 {
1011 __be32 *p;
1012
1013 RESERVE_SPACE(4);
1014 switch (arg->open_flags & O_CREAT) {
1015 case 0:
1016 WRITE32(NFS4_OPEN_NOCREATE);
1017 break;
1018 default:
1019 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1020 WRITE32(NFS4_OPEN_CREATE);
1021 encode_createmode(xdr, arg);
1022 }
1023 }
1024
1025 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
1026 {
1027 __be32 *p;
1028
1029 RESERVE_SPACE(4);
1030 switch (delegation_type) {
1031 case 0:
1032 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1033 break;
1034 case FMODE_READ:
1035 WRITE32(NFS4_OPEN_DELEGATE_READ);
1036 break;
1037 case FMODE_WRITE|FMODE_READ:
1038 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1039 break;
1040 default:
1041 BUG();
1042 }
1043 }
1044
1045 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1046 {
1047 __be32 *p;
1048
1049 RESERVE_SPACE(4);
1050 WRITE32(NFS4_OPEN_CLAIM_NULL);
1051 encode_string(xdr, name->len, name->name);
1052 }
1053
1054 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
1055 {
1056 __be32 *p;
1057
1058 RESERVE_SPACE(4);
1059 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1060 encode_delegation_type(xdr, type);
1061 }
1062
1063 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1064 {
1065 __be32 *p;
1066
1067 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1068 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1069 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1070 encode_string(xdr, name->len, name->name);
1071 }
1072
1073 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1074 {
1075 encode_openhdr(xdr, arg);
1076 encode_opentype(xdr, arg);
1077 switch (arg->claim) {
1078 case NFS4_OPEN_CLAIM_NULL:
1079 encode_claim_null(xdr, arg->name);
1080 break;
1081 case NFS4_OPEN_CLAIM_PREVIOUS:
1082 encode_claim_previous(xdr, arg->u.delegation_type);
1083 break;
1084 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1085 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1086 break;
1087 default:
1088 BUG();
1089 }
1090 return 0;
1091 }
1092
1093 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1094 {
1095 __be32 *p;
1096
1097 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1098 WRITE32(OP_OPEN_CONFIRM);
1099 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1100 WRITE32(arg->seqid->sequence->counter);
1101
1102 return 0;
1103 }
1104
1105 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1106 {
1107 __be32 *p;
1108
1109 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1110 WRITE32(OP_OPEN_DOWNGRADE);
1111 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1112 WRITE32(arg->seqid->sequence->counter);
1113 encode_share_access(xdr, arg->open_flags);
1114 return 0;
1115 }
1116
1117 static int
1118 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1119 {
1120 int len = fh->size;
1121 __be32 *p;
1122
1123 RESERVE_SPACE(8 + len);
1124 WRITE32(OP_PUTFH);
1125 WRITE32(len);
1126 WRITEMEM(fh->data, len);
1127
1128 return 0;
1129 }
1130
1131 static int encode_putrootfh(struct xdr_stream *xdr)
1132 {
1133 __be32 *p;
1134
1135 RESERVE_SPACE(4);
1136 WRITE32(OP_PUTROOTFH);
1137
1138 return 0;
1139 }
1140
1141 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1142 {
1143 nfs4_stateid stateid;
1144 __be32 *p;
1145
1146 RESERVE_SPACE(NFS4_STATEID_SIZE);
1147 if (ctx->state != NULL) {
1148 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1149 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1150 } else
1151 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1152 }
1153
1154 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1155 {
1156 __be32 *p;
1157
1158 RESERVE_SPACE(4);
1159 WRITE32(OP_READ);
1160
1161 encode_stateid(xdr, args->context);
1162
1163 RESERVE_SPACE(12);
1164 WRITE64(args->offset);
1165 WRITE32(args->count);
1166
1167 return 0;
1168 }
1169
1170 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1171 {
1172 uint32_t attrs[2] = {
1173 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1174 FATTR4_WORD1_MOUNTED_ON_FILEID,
1175 };
1176 __be32 *p;
1177
1178 RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1179 WRITE32(OP_READDIR);
1180 WRITE64(readdir->cookie);
1181 WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1182 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1183 WRITE32(readdir->count);
1184 WRITE32(2);
1185 /* Switch to mounted_on_fileid if the server supports it */
1186 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1187 attrs[0] &= ~FATTR4_WORD0_FILEID;
1188 else
1189 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1190 WRITE32(attrs[0] & readdir->bitmask[0]);
1191 WRITE32(attrs[1] & readdir->bitmask[1]);
1192 dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1193 __FUNCTION__,
1194 (unsigned long long)readdir->cookie,
1195 ((u32 *)readdir->verifier.data)[0],
1196 ((u32 *)readdir->verifier.data)[1],
1197 attrs[0] & readdir->bitmask[0],
1198 attrs[1] & readdir->bitmask[1]);
1199
1200 return 0;
1201 }
1202
1203 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1204 {
1205 __be32 *p;
1206
1207 RESERVE_SPACE(4);
1208 WRITE32(OP_READLINK);
1209
1210 return 0;
1211 }
1212
1213 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1214 {
1215 __be32 *p;
1216
1217 RESERVE_SPACE(8 + name->len);
1218 WRITE32(OP_REMOVE);
1219 WRITE32(name->len);
1220 WRITEMEM(name->name, name->len);
1221
1222 return 0;
1223 }
1224
1225 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1226 {
1227 __be32 *p;
1228
1229 RESERVE_SPACE(8 + oldname->len);
1230 WRITE32(OP_RENAME);
1231 WRITE32(oldname->len);
1232 WRITEMEM(oldname->name, oldname->len);
1233
1234 RESERVE_SPACE(4 + newname->len);
1235 WRITE32(newname->len);
1236 WRITEMEM(newname->name, newname->len);
1237
1238 return 0;
1239 }
1240
1241 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1242 {
1243 __be32 *p;
1244
1245 RESERVE_SPACE(12);
1246 WRITE32(OP_RENEW);
1247 WRITE64(client_stateid->cl_clientid);
1248
1249 return 0;
1250 }
1251
1252 static int
1253 encode_restorefh(struct xdr_stream *xdr)
1254 {
1255 __be32 *p;
1256
1257 RESERVE_SPACE(4);
1258 WRITE32(OP_RESTOREFH);
1259
1260 return 0;
1261 }
1262
1263 static int
1264 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1265 {
1266 __be32 *p;
1267
1268 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1269 WRITE32(OP_SETATTR);
1270 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1271 RESERVE_SPACE(2*4);
1272 WRITE32(1);
1273 WRITE32(FATTR4_WORD0_ACL);
1274 if (arg->acl_len % 4)
1275 return -EINVAL;
1276 RESERVE_SPACE(4);
1277 WRITE32(arg->acl_len);
1278 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1279 return 0;
1280 }
1281
1282 static int
1283 encode_savefh(struct xdr_stream *xdr)
1284 {
1285 __be32 *p;
1286
1287 RESERVE_SPACE(4);
1288 WRITE32(OP_SAVEFH);
1289
1290 return 0;
1291 }
1292
1293 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1294 {
1295 int status;
1296 __be32 *p;
1297
1298 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1299 WRITE32(OP_SETATTR);
1300 WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1301
1302 if ((status = encode_attrs(xdr, arg->iap, server)))
1303 return status;
1304
1305 return 0;
1306 }
1307
1308 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1309 {
1310 __be32 *p;
1311
1312 RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1313 WRITE32(OP_SETCLIENTID);
1314 WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1315
1316 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1317 RESERVE_SPACE(4);
1318 WRITE32(setclientid->sc_prog);
1319 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1320 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1321 RESERVE_SPACE(4);
1322 WRITE32(setclientid->sc_cb_ident);
1323
1324 return 0;
1325 }
1326
1327 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1328 {
1329 __be32 *p;
1330
1331 RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1332 WRITE32(OP_SETCLIENTID_CONFIRM);
1333 WRITE64(client_state->cl_clientid);
1334 WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1335
1336 return 0;
1337 }
1338
1339 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1340 {
1341 __be32 *p;
1342
1343 RESERVE_SPACE(4);
1344 WRITE32(OP_WRITE);
1345
1346 encode_stateid(xdr, args->context);
1347
1348 RESERVE_SPACE(16);
1349 WRITE64(args->offset);
1350 WRITE32(args->stable);
1351 WRITE32(args->count);
1352
1353 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1354
1355 return 0;
1356 }
1357
1358 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1359 {
1360 __be32 *p;
1361
1362 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1363
1364 WRITE32(OP_DELEGRETURN);
1365 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1366 return 0;
1367
1368 }
1369 /*
1370 * END OF "GENERIC" ENCODE ROUTINES.
1371 */
1372
1373 /*
1374 * Encode an ACCESS request
1375 */
1376 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1377 {
1378 struct xdr_stream xdr;
1379 struct compound_hdr hdr = {
1380 .nops = 3,
1381 };
1382 int status;
1383
1384 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1385 encode_compound_hdr(&xdr, &hdr);
1386 status = encode_putfh(&xdr, args->fh);
1387 if (status != 0)
1388 goto out;
1389 status = encode_access(&xdr, args->access);
1390 if (status != 0)
1391 goto out;
1392 status = encode_getfattr(&xdr, args->bitmask);
1393 out:
1394 return status;
1395 }
1396
1397 /*
1398 * Encode LOOKUP request
1399 */
1400 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1401 {
1402 struct xdr_stream xdr;
1403 struct compound_hdr hdr = {
1404 .nops = 4,
1405 };
1406 int status;
1407
1408 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1409 encode_compound_hdr(&xdr, &hdr);
1410 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1411 goto out;
1412 if ((status = encode_lookup(&xdr, args->name)) != 0)
1413 goto out;
1414 if ((status = encode_getfh(&xdr)) != 0)
1415 goto out;
1416 status = encode_getfattr(&xdr, args->bitmask);
1417 out:
1418 return status;
1419 }
1420
1421 /*
1422 * Encode LOOKUP_ROOT request
1423 */
1424 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1425 {
1426 struct xdr_stream xdr;
1427 struct compound_hdr hdr = {
1428 .nops = 3,
1429 };
1430 int status;
1431
1432 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1433 encode_compound_hdr(&xdr, &hdr);
1434 if ((status = encode_putrootfh(&xdr)) != 0)
1435 goto out;
1436 if ((status = encode_getfh(&xdr)) == 0)
1437 status = encode_getfattr(&xdr, args->bitmask);
1438 out:
1439 return status;
1440 }
1441
1442 /*
1443 * Encode REMOVE request
1444 */
1445 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1446 {
1447 struct xdr_stream xdr;
1448 struct compound_hdr hdr = {
1449 .nops = 3,
1450 };
1451 int status;
1452
1453 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1454 encode_compound_hdr(&xdr, &hdr);
1455 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1456 goto out;
1457 if ((status = encode_remove(&xdr, &args->name)) != 0)
1458 goto out;
1459 status = encode_getfattr(&xdr, args->bitmask);
1460 out:
1461 return status;
1462 }
1463
1464 /*
1465 * Encode RENAME request
1466 */
1467 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1468 {
1469 struct xdr_stream xdr;
1470 struct compound_hdr hdr = {
1471 .nops = 7,
1472 };
1473 int status;
1474
1475 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1476 encode_compound_hdr(&xdr, &hdr);
1477 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1478 goto out;
1479 if ((status = encode_savefh(&xdr)) != 0)
1480 goto out;
1481 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1482 goto out;
1483 if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1484 goto out;
1485 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1486 goto out;
1487 if ((status = encode_restorefh(&xdr)) != 0)
1488 goto out;
1489 status = encode_getfattr(&xdr, args->bitmask);
1490 out:
1491 return status;
1492 }
1493
1494 /*
1495 * Encode LINK request
1496 */
1497 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1498 {
1499 struct xdr_stream xdr;
1500 struct compound_hdr hdr = {
1501 .nops = 7,
1502 };
1503 int status;
1504
1505 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1506 encode_compound_hdr(&xdr, &hdr);
1507 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1508 goto out;
1509 if ((status = encode_savefh(&xdr)) != 0)
1510 goto out;
1511 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1512 goto out;
1513 if ((status = encode_link(&xdr, args->name)) != 0)
1514 goto out;
1515 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1516 goto out;
1517 if ((status = encode_restorefh(&xdr)) != 0)
1518 goto out;
1519 status = encode_getfattr(&xdr, args->bitmask);
1520 out:
1521 return status;
1522 }
1523
1524 /*
1525 * Encode CREATE request
1526 */
1527 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1528 {
1529 struct xdr_stream xdr;
1530 struct compound_hdr hdr = {
1531 .nops = 7,
1532 };
1533 int status;
1534
1535 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1536 encode_compound_hdr(&xdr, &hdr);
1537 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1538 goto out;
1539 if ((status = encode_savefh(&xdr)) != 0)
1540 goto out;
1541 if ((status = encode_create(&xdr, args)) != 0)
1542 goto out;
1543 if ((status = encode_getfh(&xdr)) != 0)
1544 goto out;
1545 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1546 goto out;
1547 if ((status = encode_restorefh(&xdr)) != 0)
1548 goto out;
1549 status = encode_getfattr(&xdr, args->bitmask);
1550 out:
1551 return status;
1552 }
1553
1554 /*
1555 * Encode SYMLINK request
1556 */
1557 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1558 {
1559 return nfs4_xdr_enc_create(req, p, args);
1560 }
1561
1562 /*
1563 * Encode GETATTR request
1564 */
1565 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1566 {
1567 struct xdr_stream xdr;
1568 struct compound_hdr hdr = {
1569 .nops = 2,
1570 };
1571 int status;
1572
1573 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1574 encode_compound_hdr(&xdr, &hdr);
1575 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1576 status = encode_getfattr(&xdr, args->bitmask);
1577 return status;
1578 }
1579
1580 /*
1581 * Encode a CLOSE request
1582 */
1583 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1584 {
1585 struct xdr_stream xdr;
1586 struct compound_hdr hdr = {
1587 .nops = 3,
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_close(&xdr, args);
1597 if (status != 0)
1598 goto out;
1599 status = encode_getfattr(&xdr, args->bitmask);
1600 out:
1601 return status;
1602 }
1603
1604 /*
1605 * Encode an OPEN request
1606 */
1607 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1608 {
1609 struct xdr_stream xdr;
1610 struct compound_hdr hdr = {
1611 .nops = 7,
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_savefh(&xdr);
1621 if (status)
1622 goto out;
1623 status = encode_open(&xdr, args);
1624 if (status)
1625 goto out;
1626 status = encode_getfh(&xdr);
1627 if (status)
1628 goto out;
1629 status = encode_getfattr(&xdr, args->bitmask);
1630 if (status)
1631 goto out;
1632 status = encode_restorefh(&xdr);
1633 if (status)
1634 goto out;
1635 status = encode_getfattr(&xdr, args->bitmask);
1636 out:
1637 return status;
1638 }
1639
1640 /*
1641 * Encode an OPEN_CONFIRM request
1642 */
1643 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1644 {
1645 struct xdr_stream xdr;
1646 struct compound_hdr hdr = {
1647 .nops = 2,
1648 };
1649 int status;
1650
1651 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1652 encode_compound_hdr(&xdr, &hdr);
1653 status = encode_putfh(&xdr, args->fh);
1654 if(status)
1655 goto out;
1656 status = encode_open_confirm(&xdr, args);
1657 out:
1658 return status;
1659 }
1660
1661 /*
1662 * Encode an OPEN request with no attributes.
1663 */
1664 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1665 {
1666 struct xdr_stream xdr;
1667 struct compound_hdr hdr = {
1668 .nops = 3,
1669 };
1670 int status;
1671
1672 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1673 encode_compound_hdr(&xdr, &hdr);
1674 status = encode_putfh(&xdr, args->fh);
1675 if (status)
1676 goto out;
1677 status = encode_open(&xdr, args);
1678 if (status)
1679 goto out;
1680 status = encode_getfattr(&xdr, args->bitmask);
1681 out:
1682 return status;
1683 }
1684
1685 /*
1686 * Encode an OPEN_DOWNGRADE request
1687 */
1688 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1689 {
1690 struct xdr_stream xdr;
1691 struct compound_hdr hdr = {
1692 .nops = 3,
1693 };
1694 int status;
1695
1696 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1697 encode_compound_hdr(&xdr, &hdr);
1698 status = encode_putfh(&xdr, args->fh);
1699 if (status)
1700 goto out;
1701 status = encode_open_downgrade(&xdr, args);
1702 if (status != 0)
1703 goto out;
1704 status = encode_getfattr(&xdr, args->bitmask);
1705 out:
1706 return status;
1707 }
1708
1709 /*
1710 * Encode a LOCK request
1711 */
1712 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1713 {
1714 struct xdr_stream xdr;
1715 struct compound_hdr hdr = {
1716 .nops = 2,
1717 };
1718 int status;
1719
1720 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1721 encode_compound_hdr(&xdr, &hdr);
1722 status = encode_putfh(&xdr, args->fh);
1723 if(status)
1724 goto out;
1725 status = encode_lock(&xdr, args);
1726 out:
1727 return status;
1728 }
1729
1730 /*
1731 * Encode a LOCKT request
1732 */
1733 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1734 {
1735 struct xdr_stream xdr;
1736 struct compound_hdr hdr = {
1737 .nops = 2,
1738 };
1739 int status;
1740
1741 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1742 encode_compound_hdr(&xdr, &hdr);
1743 status = encode_putfh(&xdr, args->fh);
1744 if(status)
1745 goto out;
1746 status = encode_lockt(&xdr, args);
1747 out:
1748 return status;
1749 }
1750
1751 /*
1752 * Encode a LOCKU request
1753 */
1754 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1755 {
1756 struct xdr_stream xdr;
1757 struct compound_hdr hdr = {
1758 .nops = 2,
1759 };
1760 int status;
1761
1762 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1763 encode_compound_hdr(&xdr, &hdr);
1764 status = encode_putfh(&xdr, args->fh);
1765 if(status)
1766 goto out;
1767 status = encode_locku(&xdr, args);
1768 out:
1769 return status;
1770 }
1771
1772 /*
1773 * Encode a READLINK request
1774 */
1775 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1776 {
1777 struct xdr_stream xdr;
1778 struct compound_hdr hdr = {
1779 .nops = 2,
1780 };
1781 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1782 unsigned int replen;
1783 int status;
1784
1785 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1786 encode_compound_hdr(&xdr, &hdr);
1787 status = encode_putfh(&xdr, args->fh);
1788 if(status)
1789 goto out;
1790 status = encode_readlink(&xdr, args, req);
1791
1792 /* set up reply kvec
1793 * toplevel_status + taglen + rescount + OP_PUTFH + status
1794 * + OP_READLINK + status + string length = 8
1795 */
1796 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1797 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1798 args->pgbase, args->pglen);
1799
1800 out:
1801 return status;
1802 }
1803
1804 /*
1805 * Encode a READDIR request
1806 */
1807 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1808 {
1809 struct xdr_stream xdr;
1810 struct compound_hdr hdr = {
1811 .nops = 2,
1812 };
1813 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1814 int replen;
1815 int status;
1816
1817 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1818 encode_compound_hdr(&xdr, &hdr);
1819 status = encode_putfh(&xdr, args->fh);
1820 if(status)
1821 goto out;
1822 status = encode_readdir(&xdr, args, req);
1823
1824 /* set up reply kvec
1825 * toplevel_status + taglen + rescount + OP_PUTFH + status
1826 * + OP_READDIR + status + verifer(2) = 9
1827 */
1828 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1829 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1830 args->pgbase, args->count);
1831 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1832 __FUNCTION__, replen, args->pages,
1833 args->pgbase, args->count);
1834
1835 out:
1836 return status;
1837 }
1838
1839 /*
1840 * Encode a READ request
1841 */
1842 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1843 {
1844 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1845 struct xdr_stream xdr;
1846 struct compound_hdr hdr = {
1847 .nops = 2,
1848 };
1849 int replen, status;
1850
1851 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1852 encode_compound_hdr(&xdr, &hdr);
1853 status = encode_putfh(&xdr, args->fh);
1854 if (status)
1855 goto out;
1856 status = encode_read(&xdr, args);
1857 if (status)
1858 goto out;
1859
1860 /* set up reply kvec
1861 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1862 * + OP_READ + status + eof + datalen = 9
1863 */
1864 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1865 xdr_inline_pages(&req->rq_rcv_buf, replen,
1866 args->pages, args->pgbase, args->count);
1867 req->rq_rcv_buf.flags |= XDRBUF_READ;
1868 out:
1869 return status;
1870 }
1871
1872 /*
1873 * Encode an SETATTR request
1874 */
1875 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1876
1877 {
1878 struct xdr_stream xdr;
1879 struct compound_hdr hdr = {
1880 .nops = 3,
1881 };
1882 int status;
1883
1884 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1885 encode_compound_hdr(&xdr, &hdr);
1886 status = encode_putfh(&xdr, args->fh);
1887 if(status)
1888 goto out;
1889 status = encode_setattr(&xdr, args, args->server);
1890 if(status)
1891 goto out;
1892 status = encode_getfattr(&xdr, args->bitmask);
1893 out:
1894 return status;
1895 }
1896
1897 /*
1898 * Encode a GETACL request
1899 */
1900 static int
1901 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1902 struct nfs_getaclargs *args)
1903 {
1904 struct xdr_stream xdr;
1905 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1906 struct compound_hdr hdr = {
1907 .nops = 2,
1908 };
1909 int replen, status;
1910
1911 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1912 encode_compound_hdr(&xdr, &hdr);
1913 status = encode_putfh(&xdr, args->fh);
1914 if (status)
1915 goto out;
1916 status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1917 /* set up reply buffer: */
1918 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1919 xdr_inline_pages(&req->rq_rcv_buf, replen,
1920 args->acl_pages, args->acl_pgbase, args->acl_len);
1921 out:
1922 return status;
1923 }
1924
1925 /*
1926 * Encode a WRITE request
1927 */
1928 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1929 {
1930 struct xdr_stream xdr;
1931 struct compound_hdr hdr = {
1932 .nops = 3,
1933 };
1934 int status;
1935
1936 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1937 encode_compound_hdr(&xdr, &hdr);
1938 status = encode_putfh(&xdr, args->fh);
1939 if (status)
1940 goto out;
1941 status = encode_write(&xdr, args);
1942 if (status)
1943 goto out;
1944 req->rq_snd_buf.flags |= XDRBUF_WRITE;
1945 status = encode_getfattr(&xdr, args->bitmask);
1946 out:
1947 return status;
1948 }
1949
1950 /*
1951 * a COMMIT request
1952 */
1953 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1954 {
1955 struct xdr_stream xdr;
1956 struct compound_hdr hdr = {
1957 .nops = 3,
1958 };
1959 int status;
1960
1961 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1962 encode_compound_hdr(&xdr, &hdr);
1963 status = encode_putfh(&xdr, args->fh);
1964 if (status)
1965 goto out;
1966 status = encode_commit(&xdr, args);
1967 if (status)
1968 goto out;
1969 status = encode_getfattr(&xdr, args->bitmask);
1970 out:
1971 return status;
1972 }
1973
1974 /*
1975 * FSINFO request
1976 */
1977 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1978 {
1979 struct xdr_stream xdr;
1980 struct compound_hdr hdr = {
1981 .nops = 2,
1982 };
1983 int status;
1984
1985 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1986 encode_compound_hdr(&xdr, &hdr);
1987 status = encode_putfh(&xdr, args->fh);
1988 if (!status)
1989 status = encode_fsinfo(&xdr, args->bitmask);
1990 return status;
1991 }
1992
1993 /*
1994 * a PATHCONF request
1995 */
1996 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1997 {
1998 struct xdr_stream xdr;
1999 struct compound_hdr hdr = {
2000 .nops = 2,
2001 };
2002 int status;
2003
2004 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2005 encode_compound_hdr(&xdr, &hdr);
2006 status = encode_putfh(&xdr, args->fh);
2007 if (!status)
2008 status = encode_getattr_one(&xdr,
2009 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2010 return status;
2011 }
2012
2013 /*
2014 * a STATFS request
2015 */
2016 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2017 {
2018 struct xdr_stream xdr;
2019 struct compound_hdr hdr = {
2020 .nops = 2,
2021 };
2022 int status;
2023
2024 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2025 encode_compound_hdr(&xdr, &hdr);
2026 status = encode_putfh(&xdr, args->fh);
2027 if (status == 0)
2028 status = encode_getattr_two(&xdr,
2029 args->bitmask[0] & nfs4_statfs_bitmap[0],
2030 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2031 return status;
2032 }
2033
2034 /*
2035 * GETATTR_BITMAP request
2036 */
2037 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2038 {
2039 struct xdr_stream xdr;
2040 struct compound_hdr hdr = {
2041 .nops = 2,
2042 };
2043 int status;
2044
2045 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2046 encode_compound_hdr(&xdr, &hdr);
2047 status = encode_putfh(&xdr, fhandle);
2048 if (status == 0)
2049 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2050 FATTR4_WORD0_LINK_SUPPORT|
2051 FATTR4_WORD0_SYMLINK_SUPPORT|
2052 FATTR4_WORD0_ACLSUPPORT);
2053 return status;
2054 }
2055
2056 /*
2057 * a RENEW request
2058 */
2059 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2060 {
2061 struct xdr_stream xdr;
2062 struct compound_hdr hdr = {
2063 .nops = 1,
2064 };
2065
2066 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2067 encode_compound_hdr(&xdr, &hdr);
2068 return encode_renew(&xdr, clp);
2069 }
2070
2071 /*
2072 * a SETCLIENTID request
2073 */
2074 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2075 {
2076 struct xdr_stream xdr;
2077 struct compound_hdr hdr = {
2078 .nops = 1,
2079 };
2080
2081 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2082 encode_compound_hdr(&xdr, &hdr);
2083 return encode_setclientid(&xdr, sc);
2084 }
2085
2086 /*
2087 * a SETCLIENTID_CONFIRM request
2088 */
2089 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2090 {
2091 struct xdr_stream xdr;
2092 struct compound_hdr hdr = {
2093 .nops = 3,
2094 };
2095 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2096 int status;
2097
2098 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2099 encode_compound_hdr(&xdr, &hdr);
2100 status = encode_setclientid_confirm(&xdr, clp);
2101 if (!status)
2102 status = encode_putrootfh(&xdr);
2103 if (!status)
2104 status = encode_fsinfo(&xdr, lease_bitmap);
2105 return status;
2106 }
2107
2108 /*
2109 * DELEGRETURN request
2110 */
2111 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2112 {
2113 struct xdr_stream xdr;
2114 struct compound_hdr hdr = {
2115 .nops = 3,
2116 };
2117 int status;
2118
2119 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2120 encode_compound_hdr(&xdr, &hdr);
2121 status = encode_putfh(&xdr, args->fhandle);
2122 if (status != 0)
2123 goto out;
2124 status = encode_delegreturn(&xdr, args->stateid);
2125 if (status != 0)
2126 goto out;
2127 status = encode_getfattr(&xdr, args->bitmask);
2128 out:
2129 return status;
2130 }
2131
2132 /*
2133 * Encode FS_LOCATIONS request
2134 */
2135 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2136 {
2137 struct xdr_stream xdr;
2138 struct compound_hdr hdr = {
2139 .nops = 3,
2140 };
2141 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2142 int replen;
2143 int status;
2144
2145 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2146 encode_compound_hdr(&xdr, &hdr);
2147 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2148 goto out;
2149 if ((status = encode_lookup(&xdr, args->name)) != 0)
2150 goto out;
2151 if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2152 goto out;
2153 /* set up reply
2154 * toplevel_status + OP_PUTFH + status
2155 * + OP_LOOKUP + status + OP_GETATTR + status = 7
2156 */
2157 replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2158 xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2159 0, PAGE_SIZE);
2160 out:
2161 return status;
2162 }
2163
2164 /*
2165 * START OF "GENERIC" DECODE ROUTINES.
2166 * These may look a little ugly since they are imported from a "generic"
2167 * set of XDR encode/decode routines which are intended to be shared by
2168 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2169 *
2170 * If the pain of reading these is too great, it should be a straightforward
2171 * task to translate them into Linux-specific versions which are more
2172 * consistent with the style used in NFSv2/v3...
2173 */
2174 #define READ32(x) (x) = ntohl(*p++)
2175 #define READ64(x) do { \
2176 (x) = (u64)ntohl(*p++) << 32; \
2177 (x) |= ntohl(*p++); \
2178 } while (0)
2179 #define READTIME(x) do { \
2180 p++; \
2181 (x.tv_sec) = ntohl(*p++); \
2182 (x.tv_nsec) = ntohl(*p++); \
2183 } while (0)
2184 #define COPYMEM(x,nbytes) do { \
2185 memcpy((x), p, nbytes); \
2186 p += XDR_QUADLEN(nbytes); \
2187 } while (0)
2188
2189 #define READ_BUF(nbytes) do { \
2190 p = xdr_inline_decode(xdr, nbytes); \
2191 if (unlikely(!p)) { \
2192 dprintk("nfs: %s: prematurely hit end of receive" \
2193 " buffer\n", __FUNCTION__); \
2194 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2195 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2196 return -EIO; \
2197 } \
2198 } while (0)
2199
2200 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2201 {
2202 __be32 *p;
2203
2204 READ_BUF(4);
2205 READ32(*len);
2206 READ_BUF(*len);
2207 *string = (char *)p;
2208 return 0;
2209 }
2210
2211 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2212 {
2213 __be32 *p;
2214
2215 READ_BUF(8);
2216 READ32(hdr->status);
2217 READ32(hdr->taglen);
2218
2219 READ_BUF(hdr->taglen + 4);
2220 hdr->tag = (char *)p;
2221 p += XDR_QUADLEN(hdr->taglen);
2222 READ32(hdr->nops);
2223 return 0;
2224 }
2225
2226 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2227 {
2228 __be32 *p;
2229 uint32_t opnum;
2230 int32_t nfserr;
2231
2232 READ_BUF(8);
2233 READ32(opnum);
2234 if (opnum != expected) {
2235 dprintk("nfs: Server returned operation"
2236 " %d but we issued a request for %d\n",
2237 opnum, expected);
2238 return -EIO;
2239 }
2240 READ32(nfserr);
2241 if (nfserr != NFS_OK)
2242 return -nfs4_stat_to_errno(nfserr);
2243 return 0;
2244 }
2245
2246 /* Dummy routine */
2247 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2248 {
2249 __be32 *p;
2250 unsigned int strlen;
2251 char *str;
2252
2253 READ_BUF(12);
2254 return decode_opaque_inline(xdr, &strlen, &str);
2255 }
2256
2257 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2258 {
2259 uint32_t bmlen;
2260 __be32 *p;
2261
2262 READ_BUF(4);
2263 READ32(bmlen);
2264
2265 bitmap[0] = bitmap[1] = 0;
2266 READ_BUF((bmlen << 2));
2267 if (bmlen > 0) {
2268 READ32(bitmap[0]);
2269 if (bmlen > 1)
2270 READ32(bitmap[1]);
2271 }
2272 return 0;
2273 }
2274
2275 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2276 {
2277 __be32 *p;
2278
2279 READ_BUF(4);
2280 READ32(*attrlen);
2281 *savep = xdr->p;
2282 return 0;
2283 }
2284
2285 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2286 {
2287 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2288 decode_attr_bitmap(xdr, bitmask);
2289 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2290 } else
2291 bitmask[0] = bitmask[1] = 0;
2292 dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2293 return 0;
2294 }
2295
2296 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2297 {
2298 __be32 *p;
2299
2300 *type = 0;
2301 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2302 return -EIO;
2303 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2304 READ_BUF(4);
2305 READ32(*type);
2306 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2307 dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2308 return -EIO;
2309 }
2310 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2311 }
2312 dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2313 return 0;
2314 }
2315
2316 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2317 {
2318 __be32 *p;
2319
2320 *change = 0;
2321 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2322 return -EIO;
2323 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2324 READ_BUF(8);
2325 READ64(*change);
2326 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2327 }
2328 dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2329 (unsigned long long)*change);
2330 return 0;
2331 }
2332
2333 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2334 {
2335 __be32 *p;
2336
2337 *size = 0;
2338 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2339 return -EIO;
2340 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2341 READ_BUF(8);
2342 READ64(*size);
2343 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2344 }
2345 dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2346 return 0;
2347 }
2348
2349 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2350 {
2351 __be32 *p;
2352
2353 *res = 0;
2354 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2355 return -EIO;
2356 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2357 READ_BUF(4);
2358 READ32(*res);
2359 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2360 }
2361 dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2362 return 0;
2363 }
2364
2365 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2366 {
2367 __be32 *p;
2368
2369 *res = 0;
2370 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2371 return -EIO;
2372 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2373 READ_BUF(4);
2374 READ32(*res);
2375 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2376 }
2377 dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2378 return 0;
2379 }
2380
2381 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2382 {
2383 __be32 *p;
2384
2385 fsid->major = 0;
2386 fsid->minor = 0;
2387 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2388 return -EIO;
2389 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2390 READ_BUF(16);
2391 READ64(fsid->major);
2392 READ64(fsid->minor);
2393 bitmap[0] &= ~FATTR4_WORD0_FSID;
2394 }
2395 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2396 (unsigned long long)fsid->major,
2397 (unsigned long long)fsid->minor);
2398 return 0;
2399 }
2400
2401 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2402 {
2403 __be32 *p;
2404
2405 *res = 60;
2406 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2407 return -EIO;
2408 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2409 READ_BUF(4);
2410 READ32(*res);
2411 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2412 }
2413 dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2414 return 0;
2415 }
2416
2417 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2418 {
2419 __be32 *p;
2420
2421 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2422 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2423 return -EIO;
2424 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2425 READ_BUF(4);
2426 READ32(*res);
2427 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2428 }
2429 dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2430 return 0;
2431 }
2432
2433 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2434 {
2435 __be32 *p;
2436
2437 *fileid = 0;
2438 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2439 return -EIO;
2440 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2441 READ_BUF(8);
2442 READ64(*fileid);
2443 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2444 }
2445 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2446 return 0;
2447 }
2448
2449 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2450 {
2451 __be32 *p;
2452
2453 *fileid = 0;
2454 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2455 return -EIO;
2456 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2457 READ_BUF(8);
2458 READ64(*fileid);
2459 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2460 }
2461 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2462 return 0;
2463 }
2464
2465 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2466 {
2467 __be32 *p;
2468 int status = 0;
2469
2470 *res = 0;
2471 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2472 return -EIO;
2473 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2474 READ_BUF(8);
2475 READ64(*res);
2476 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2477 }
2478 dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2479 return status;
2480 }
2481
2482 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2483 {
2484 __be32 *p;
2485 int status = 0;
2486
2487 *res = 0;
2488 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2489 return -EIO;
2490 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2491 READ_BUF(8);
2492 READ64(*res);
2493 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2494 }
2495 dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2496 return status;
2497 }
2498
2499 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2500 {
2501 __be32 *p;
2502 int status = 0;
2503
2504 *res = 0;
2505 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2506 return -EIO;
2507 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2508 READ_BUF(8);
2509 READ64(*res);
2510 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2511 }
2512 dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2513 return status;
2514 }
2515
2516 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2517 {
2518 int n;
2519 __be32 *p;
2520 int status = 0;
2521
2522 READ_BUF(4);
2523 READ32(n);
2524 if (n < 0)
2525 goto out_eio;
2526 if (n == 0)
2527 goto root_path;
2528 dprintk("path ");
2529 path->ncomponents = 0;
2530 while (path->ncomponents < n) {
2531 struct nfs4_string *component = &path->components[path->ncomponents];
2532 status = decode_opaque_inline(xdr, &component->len, &component->data);
2533 if (unlikely(status != 0))
2534 goto out_eio;
2535 if (path->ncomponents != n)
2536 dprintk("/");
2537 dprintk("%s", component->data);
2538 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2539 path->ncomponents++;
2540 else {
2541 dprintk("cannot parse %d components in path\n", n);
2542 goto out_eio;
2543 }
2544 }
2545 out:
2546 dprintk("\n");
2547 return status;
2548 root_path:
2549 /* a root pathname is sent as a zero component4 */
2550 path->ncomponents = 1;
2551 path->components[0].len=0;
2552 path->components[0].data=NULL;
2553 dprintk("path /\n");
2554 goto out;
2555 out_eio:
2556 dprintk(" status %d", status);
2557 status = -EIO;
2558 goto out;
2559 }
2560
2561 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2562 {
2563 int n;
2564 __be32 *p;
2565 int status = -EIO;
2566
2567 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2568 goto out;
2569 status = 0;
2570 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2571 goto out;
2572 dprintk("%s: fsroot ", __FUNCTION__);
2573 status = decode_pathname(xdr, &res->fs_path);
2574 if (unlikely(status != 0))
2575 goto out;
2576 READ_BUF(4);
2577 READ32(n);
2578 if (n <= 0)
2579 goto out_eio;
2580 res->nlocations = 0;
2581 while (res->nlocations < n) {
2582 int m;
2583 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2584
2585 READ_BUF(4);
2586 READ32(m);
2587 if (m <= 0)
2588 goto out_eio;
2589
2590 loc->nservers = 0;
2591 dprintk("%s: servers ", __FUNCTION__);
2592 while (loc->nservers < m) {
2593 struct nfs4_string *server = &loc->servers[loc->nservers];
2594 status = decode_opaque_inline(xdr, &server->len, &server->data);
2595 if (unlikely(status != 0))
2596 goto out_eio;
2597 dprintk("%s ", server->data);
2598 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2599 loc->nservers++;
2600 else {
2601 int i;
2602 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2603 for (i = loc->nservers; i < m; i++) {
2604 unsigned int len;
2605 char *data;
2606 status = decode_opaque_inline(xdr, &len, &data);
2607 if (unlikely(status != 0))
2608 goto out_eio;
2609 }
2610 }
2611 }
2612 status = decode_pathname(xdr, &loc->rootpath);
2613 if (unlikely(status != 0))
2614 goto out_eio;
2615 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2616 res->nlocations++;
2617 }
2618 out:
2619 dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2620 return status;
2621 out_eio:
2622 status = -EIO;
2623 goto out;
2624 }
2625
2626 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2627 {
2628 __be32 *p;
2629 int status = 0;
2630
2631 *res = 0;
2632 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2633 return -EIO;
2634 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2635 READ_BUF(8);
2636 READ64(*res);
2637 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2638 }
2639 dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2640 return status;
2641 }
2642
2643 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2644 {
2645 __be32 *p;
2646 int status = 0;
2647
2648 *maxlink = 1;
2649 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2650 return -EIO;
2651 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2652 READ_BUF(4);
2653 READ32(*maxlink);
2654 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2655 }
2656 dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2657 return status;
2658 }
2659
2660 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2661 {
2662 __be32 *p;
2663 int status = 0;
2664
2665 *maxname = 1024;
2666 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2667 return -EIO;
2668 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2669 READ_BUF(4);
2670 READ32(*maxname);
2671 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2672 }
2673 dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2674 return status;
2675 }
2676
2677 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2678 {
2679 __be32 *p;
2680 int status = 0;
2681
2682 *res = 1024;
2683 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2684 return -EIO;
2685 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2686 uint64_t maxread;
2687 READ_BUF(8);
2688 READ64(maxread);
2689 if (maxread > 0x7FFFFFFF)
2690 maxread = 0x7FFFFFFF;
2691 *res = (uint32_t)maxread;
2692 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2693 }
2694 dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2695 return status;
2696 }
2697
2698 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2699 {
2700 __be32 *p;
2701 int status = 0;
2702
2703 *res = 1024;
2704 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2705 return -EIO;
2706 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2707 uint64_t maxwrite;
2708 READ_BUF(8);
2709 READ64(maxwrite);
2710 if (maxwrite > 0x7FFFFFFF)
2711 maxwrite = 0x7FFFFFFF;
2712 *res = (uint32_t)maxwrite;
2713 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2714 }
2715 dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2716 return status;
2717 }
2718
2719 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2720 {
2721 __be32 *p;
2722
2723 *mode = 0;
2724 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2725 return -EIO;
2726 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2727 READ_BUF(4);
2728 READ32(*mode);
2729 *mode &= ~S_IFMT;
2730 bitmap[1] &= ~FATTR4_WORD1_MODE;
2731 }
2732 dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2733 return 0;
2734 }
2735
2736 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2737 {
2738 __be32 *p;
2739
2740 *nlink = 1;
2741 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2742 return -EIO;
2743 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2744 READ_BUF(4);
2745 READ32(*nlink);
2746 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2747 }
2748 dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2749 return 0;
2750 }
2751
2752 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2753 {
2754 uint32_t len;
2755 __be32 *p;
2756
2757 *uid = -2;
2758 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2759 return -EIO;
2760 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2761 READ_BUF(4);
2762 READ32(len);
2763 READ_BUF(len);
2764 if (len < XDR_MAX_NETOBJ) {
2765 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2766 dprintk("%s: nfs_map_name_to_uid failed!\n",
2767 __FUNCTION__);
2768 } else
2769 dprintk("%s: name too long (%u)!\n",
2770 __FUNCTION__, len);
2771 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2772 }
2773 dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2774 return 0;
2775 }
2776
2777 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2778 {
2779 uint32_t len;
2780 __be32 *p;
2781
2782 *gid = -2;
2783 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2784 return -EIO;
2785 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2786 READ_BUF(4);
2787 READ32(len);
2788 READ_BUF(len);
2789 if (len < XDR_MAX_NETOBJ) {
2790 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2791 dprintk("%s: nfs_map_group_to_gid failed!\n",
2792 __FUNCTION__);
2793 } else
2794 dprintk("%s: name too long (%u)!\n",
2795 __FUNCTION__, len);
2796 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2797 }
2798 dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2799 return 0;
2800 }
2801
2802 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2803 {
2804 uint32_t major = 0, minor = 0;
2805 __be32 *p;
2806
2807 *rdev = MKDEV(0,0);
2808 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2809 return -EIO;
2810 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2811 dev_t tmp;
2812
2813 READ_BUF(8);
2814 READ32(major);
2815 READ32(minor);
2816 tmp = MKDEV(major, minor);
2817 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2818 *rdev = tmp;
2819 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2820 }
2821 dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2822 return 0;
2823 }
2824
2825 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2826 {
2827 __be32 *p;
2828 int status = 0;
2829
2830 *res = 0;
2831 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2832 return -EIO;
2833 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2834 READ_BUF(8);
2835 READ64(*res);
2836 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2837 }
2838 dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2839 return status;
2840 }
2841
2842 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2843 {
2844 __be32 *p;
2845 int status = 0;
2846
2847 *res = 0;
2848 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2849 return -EIO;
2850 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2851 READ_BUF(8);
2852 READ64(*res);
2853 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2854 }
2855 dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2856 return status;
2857 }
2858
2859 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2860 {
2861 __be32 *p;
2862 int status = 0;
2863
2864 *res = 0;
2865 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2866 return -EIO;
2867 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2868 READ_BUF(8);
2869 READ64(*res);
2870 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2871 }
2872 dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2873 return status;
2874 }
2875
2876 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2877 {
2878 __be32 *p;
2879
2880 *used = 0;
2881 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2882 return -EIO;
2883 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2884 READ_BUF(8);
2885 READ64(*used);
2886 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2887 }
2888 dprintk("%s: space used=%Lu\n", __FUNCTION__,
2889 (unsigned long long)*used);
2890 return 0;
2891 }
2892
2893 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2894 {
2895 __be32 *p;
2896 uint64_t sec;
2897 uint32_t nsec;
2898
2899 READ_BUF(12);
2900 READ64(sec);
2901 READ32(nsec);
2902 time->tv_sec = (time_t)sec;
2903 time->tv_nsec = (long)nsec;
2904 return 0;
2905 }
2906
2907 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2908 {
2909 int status = 0;
2910
2911 time->tv_sec = 0;
2912 time->tv_nsec = 0;
2913 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2914 return -EIO;
2915 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2916 status = decode_attr_time(xdr, time);
2917 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2918 }
2919 dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2920 return status;
2921 }
2922
2923 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2924 {
2925 int status = 0;
2926
2927 time->tv_sec = 0;
2928 time->tv_nsec = 0;
2929 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2930 return -EIO;
2931 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2932 status = decode_attr_time(xdr, time);
2933 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2934 }
2935 dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2936 return status;
2937 }
2938
2939 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2940 {
2941 int status = 0;
2942
2943 time->tv_sec = 0;
2944 time->tv_nsec = 0;
2945 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2946 return -EIO;
2947 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2948 status = decode_attr_time(xdr, time);
2949 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2950 }
2951 dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2952 return status;
2953 }
2954
2955 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2956 {
2957 unsigned int attrwords = XDR_QUADLEN(attrlen);
2958 unsigned int nwords = xdr->p - savep;
2959
2960 if (unlikely(attrwords != nwords)) {
2961 dprintk("%s: server returned incorrect attribute length: "
2962 "%u %c %u\n",
2963 __FUNCTION__,
2964 attrwords << 2,
2965 (attrwords < nwords) ? '<' : '>',
2966 nwords << 2);
2967 return -EIO;
2968 }
2969 return 0;
2970 }
2971
2972 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2973 {
2974 __be32 *p;
2975
2976 READ_BUF(20);
2977 READ32(cinfo->atomic);
2978 READ64(cinfo->before);
2979 READ64(cinfo->after);
2980 return 0;
2981 }
2982
2983 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2984 {
2985 __be32 *p;
2986 uint32_t supp, acc;
2987 int status;
2988
2989 status = decode_op_hdr(xdr, OP_ACCESS);
2990 if (status)
2991 return status;
2992 READ_BUF(8);
2993 READ32(supp);
2994 READ32(acc);
2995 access->supported = supp;
2996 access->access = acc;
2997 return 0;
2998 }
2999
3000 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3001 {
3002 __be32 *p;
3003 int status;
3004
3005 status = decode_op_hdr(xdr, OP_CLOSE);
3006 if (status)
3007 return status;
3008 READ_BUF(NFS4_STATEID_SIZE);
3009 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3010 return 0;
3011 }
3012
3013 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3014 {
3015 __be32 *p;
3016 int status;
3017
3018 status = decode_op_hdr(xdr, OP_COMMIT);
3019 if (status)
3020 return status;
3021 READ_BUF(8);
3022 COPYMEM(res->verf->verifier, 8);
3023 return 0;
3024 }
3025
3026 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3027 {
3028 __be32 *p;
3029 uint32_t bmlen;
3030 int status;
3031
3032 status = decode_op_hdr(xdr, OP_CREATE);
3033 if (status)
3034 return status;
3035 if ((status = decode_change_info(xdr, cinfo)))
3036 return status;
3037 READ_BUF(4);
3038 READ32(bmlen);
3039 READ_BUF(bmlen << 2);
3040 return 0;
3041 }
3042
3043 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3044 {
3045 __be32 *savep;
3046 uint32_t attrlen,
3047 bitmap[2] = {0};
3048 int status;
3049
3050 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3051 goto xdr_error;
3052 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3053 goto xdr_error;
3054 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3055 goto xdr_error;
3056 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3057 goto xdr_error;
3058 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3059 goto xdr_error;
3060 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3061 goto xdr_error;
3062 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3063 goto xdr_error;
3064 status = verify_attr_len(xdr, savep, attrlen);
3065 xdr_error:
3066 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3067 return status;
3068 }
3069
3070 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3071 {
3072 __be32 *savep;
3073 uint32_t attrlen,
3074 bitmap[2] = {0};
3075 int status;
3076
3077 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3078 goto xdr_error;
3079 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3080 goto xdr_error;
3081 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3082 goto xdr_error;
3083
3084 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3085 goto xdr_error;
3086 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3087 goto xdr_error;
3088 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3089 goto xdr_error;
3090 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3091 goto xdr_error;
3092 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3093 goto xdr_error;
3094 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3095 goto xdr_error;
3096
3097 status = verify_attr_len(xdr, savep, attrlen);
3098 xdr_error:
3099 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3100 return status;
3101 }
3102
3103 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3104 {
3105 __be32 *savep;
3106 uint32_t attrlen,
3107 bitmap[2] = {0};
3108 int status;
3109
3110 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3111 goto xdr_error;
3112 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3113 goto xdr_error;
3114 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3115 goto xdr_error;
3116
3117 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3118 goto xdr_error;
3119 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3120 goto xdr_error;
3121
3122 status = verify_attr_len(xdr, savep, attrlen);
3123 xdr_error:
3124 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3125 return status;
3126 }
3127
3128 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3129 {
3130 __be32 *savep;
3131 uint32_t attrlen,
3132 bitmap[2] = {0},
3133 type;
3134 int status, fmode = 0;
3135 uint64_t fileid;
3136
3137 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3138 goto xdr_error;
3139 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3140 goto xdr_error;
3141
3142 fattr->bitmap[0] = bitmap[0];
3143 fattr->bitmap[1] = bitmap[1];
3144
3145 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3146 goto xdr_error;
3147
3148
3149 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3150 goto xdr_error;
3151 fattr->type = nfs_type2fmt[type].nfs2type;
3152 fmode = nfs_type2fmt[type].mode;
3153
3154 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3155 goto xdr_error;
3156 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3157 goto xdr_error;
3158 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3159 goto xdr_error;
3160 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3161 goto xdr_error;
3162 if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3163 struct nfs4_fs_locations,
3164 fattr))) != 0)
3165 goto xdr_error;
3166 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3167 goto xdr_error;
3168 fattr->mode |= fmode;
3169 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3170 goto xdr_error;
3171 if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3172 goto xdr_error;
3173 if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3174 goto xdr_error;
3175 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3176 goto xdr_error;
3177 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3178 goto xdr_error;
3179 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3180 goto xdr_error;
3181 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3182 goto xdr_error;
3183 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3184 goto xdr_error;
3185 if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3186 goto xdr_error;
3187 if (fattr->fileid == 0 && fileid != 0)
3188 fattr->fileid = fileid;
3189 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3190 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3191 xdr_error:
3192 dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3193 return status;
3194 }
3195
3196
3197 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3198 {
3199 __be32 *savep;
3200 uint32_t attrlen, bitmap[2];
3201 int status;
3202
3203 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3204 goto xdr_error;
3205 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3206 goto xdr_error;
3207 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3208 goto xdr_error;
3209
3210 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3211
3212 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3213 goto xdr_error;
3214 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3215 goto xdr_error;
3216 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3217 goto xdr_error;
3218 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3219 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3220 goto xdr_error;
3221 fsinfo->wtpref = fsinfo->wtmax;
3222
3223 status = verify_attr_len(xdr, savep, attrlen);
3224 xdr_error:
3225 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3226 return status;
3227 }
3228
3229 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3230 {
3231 __be32 *p;
3232 uint32_t len;
3233 int status;
3234
3235 /* Zero handle first to allow comparisons */
3236 memset(fh, 0, sizeof(*fh));
3237
3238 status = decode_op_hdr(xdr, OP_GETFH);
3239 if (status)
3240 return status;
3241
3242 READ_BUF(4);
3243 READ32(len);
3244 if (len > NFS4_FHSIZE)
3245 return -EIO;
3246 fh->size = len;
3247 READ_BUF(len);
3248 COPYMEM(fh->data, len);
3249 return 0;
3250 }
3251
3252 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3253 {
3254 int status;
3255
3256 status = decode_op_hdr(xdr, OP_LINK);
3257 if (status)
3258 return status;
3259 return decode_change_info(xdr, cinfo);
3260 }
3261
3262 /*
3263 * We create the owner, so we know a proper owner.id length is 4.
3264 */
3265 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3266 {
3267 uint64_t offset, length, clientid;
3268 __be32 *p;
3269 uint32_t namelen, type;
3270
3271 READ_BUF(32);
3272 READ64(offset);
3273 READ64(length);
3274 READ32(type);
3275 if (fl != NULL) {
3276 fl->fl_start = (loff_t)offset;
3277 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3278 if (length == ~(uint64_t)0)
3279 fl->fl_end = OFFSET_MAX;
3280 fl->fl_type = F_WRLCK;
3281 if (type & 1)
3282 fl->fl_type = F_RDLCK;
3283 fl->fl_pid = 0;
3284 }
3285 READ64(clientid);
3286 READ32(namelen);
3287 READ_BUF(namelen);
3288 return -NFS4ERR_DENIED;
3289 }
3290
3291 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3292 {
3293 __be32 *p;
3294 int status;
3295
3296 status = decode_op_hdr(xdr, OP_LOCK);
3297 if (status == 0) {
3298 READ_BUF(NFS4_STATEID_SIZE);
3299 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3300 } else if (status == -NFS4ERR_DENIED)
3301 return decode_lock_denied(xdr, NULL);
3302 return status;
3303 }
3304
3305 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3306 {
3307 int status;
3308 status = decode_op_hdr(xdr, OP_LOCKT);
3309 if (status == -NFS4ERR_DENIED)
3310 return decode_lock_denied(xdr, res->denied);
3311 return status;
3312 }
3313
3314 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3315 {
3316 __be32 *p;
3317 int status;
3318
3319 status = decode_op_hdr(xdr, OP_LOCKU);
3320 if (status == 0) {
3321 READ_BUF(NFS4_STATEID_SIZE);
3322 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3323 }
3324 return status;
3325 }
3326
3327 static int decode_lookup(struct xdr_stream *xdr)
3328 {
3329 return decode_op_hdr(xdr, OP_LOOKUP);
3330 }
3331
3332 /* This is too sick! */
3333 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3334 {
3335 __be32 *p;
3336 uint32_t limit_type, nblocks, blocksize;
3337
3338 READ_BUF(12);
3339 READ32(limit_type);
3340 switch (limit_type) {
3341 case 1:
3342 READ64(*maxsize);
3343 break;
3344 case 2:
3345 READ32(nblocks);
3346 READ32(blocksize);
3347 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3348 }
3349 return 0;
3350 }
3351
3352 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3353 {
3354 __be32 *p;
3355 uint32_t delegation_type;
3356
3357 READ_BUF(4);
3358 READ32(delegation_type);
3359 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3360 res->delegation_type = 0;
3361 return 0;
3362 }
3363 READ_BUF(NFS4_STATEID_SIZE+4);
3364 COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3365 READ32(res->do_recall);
3366 switch (delegation_type) {
3367 case NFS4_OPEN_DELEGATE_READ:
3368 res->delegation_type = FMODE_READ;
3369 break;
3370 case NFS4_OPEN_DELEGATE_WRITE:
3371 res->delegation_type = FMODE_WRITE|FMODE_READ;
3372 if (decode_space_limit(xdr, &res->maxsize) < 0)
3373 return -EIO;
3374 }
3375 return decode_ace(xdr, NULL, res->server->nfs_client);
3376 }
3377
3378 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3379 {
3380 __be32 *p;
3381 uint32_t savewords, bmlen, i;
3382 int status;
3383
3384 status = decode_op_hdr(xdr, OP_OPEN);
3385 if (status)
3386 return status;
3387 READ_BUF(NFS4_STATEID_SIZE);
3388 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3389
3390 decode_change_info(xdr, &res->cinfo);
3391
3392 READ_BUF(8);
3393 READ32(res->rflags);
3394 READ32(bmlen);
3395 if (bmlen > 10)
3396 goto xdr_error;
3397
3398 READ_BUF(bmlen << 2);
3399 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3400 for (i = 0; i < savewords; ++i)
3401 READ32(res->attrset[i]);
3402 for (; i < NFS4_BITMAP_SIZE; i++)
3403 res->attrset[i] = 0;
3404
3405 return decode_delegation(xdr, res);
3406 xdr_error:
3407 dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3408 return -EIO;
3409 }
3410
3411 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3412 {
3413 __be32 *p;
3414 int status;
3415
3416 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3417 if (status)
3418 return status;
3419 READ_BUF(NFS4_STATEID_SIZE);
3420 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3421 return 0;
3422 }
3423
3424 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3425 {
3426 __be32 *p;
3427 int status;
3428
3429 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3430 if (status)
3431 return status;
3432 READ_BUF(NFS4_STATEID_SIZE);
3433 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3434 return 0;
3435 }
3436
3437 static int decode_putfh(struct xdr_stream *xdr)
3438 {
3439 return decode_op_hdr(xdr, OP_PUTFH);
3440 }
3441
3442 static int decode_putrootfh(struct xdr_stream *xdr)
3443 {
3444 return decode_op_hdr(xdr, OP_PUTROOTFH);
3445 }
3446
3447 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3448 {
3449 struct kvec *iov = req->rq_rcv_buf.head;
3450 __be32 *p;
3451 uint32_t count, eof, recvd, hdrlen;
3452 int status;
3453
3454 status = decode_op_hdr(xdr, OP_READ);
3455 if (status)
3456 return status;
3457 READ_BUF(8);
3458 READ32(eof);
3459 READ32(count);
3460 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3461 recvd = req->rq_rcv_buf.len - hdrlen;
3462 if (count > recvd) {
3463 dprintk("NFS: server cheating in read reply: "
3464 "count %u > recvd %u\n", count, recvd);
3465 count = recvd;
3466 eof = 0;
3467 }
3468 xdr_read_pages(xdr, count);
3469 res->eof = eof;
3470 res->count = count;
3471 return 0;
3472 }
3473
3474 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3475 {
3476 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3477 struct page *page = *rcvbuf->pages;
3478 struct kvec *iov = rcvbuf->head;
3479 unsigned int nr, pglen = rcvbuf->page_len;
3480 __be32 *end, *entry, *p, *kaddr;
3481 uint32_t len, attrlen, xlen;
3482 int hdrlen, recvd, status;
3483
3484 status = decode_op_hdr(xdr, OP_READDIR);
3485 if (status)
3486 return status;
3487 READ_BUF(8);
3488 COPYMEM(readdir->verifier.data, 8);
3489 dprintk("%s: verifier = 0x%x%x\n",
3490 __FUNCTION__,
3491 ((u32 *)readdir->verifier.data)[0],
3492 ((u32 *)readdir->verifier.data)[1]);
3493
3494
3495 hdrlen = (char *) p - (char *) iov->iov_base;
3496 recvd = rcvbuf->len - hdrlen;
3497 if (pglen > recvd)
3498 pglen = recvd;
3499 xdr_read_pages(xdr, pglen);
3500
3501 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3502 kaddr = p = kmap_atomic(page, KM_USER0);
3503 end = p + ((pglen + readdir->pgbase) >> 2);
3504 entry = p;
3505 for (nr = 0; *p++; nr++) {
3506 if (end - p < 3)
3507 goto short_pkt;
3508 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3509 p += 2; /* cookie */
3510 len = ntohl(*p++); /* filename length */
3511 if (len > NFS4_MAXNAMLEN) {
3512 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3513 len);
3514 goto err_unmap;
3515 }
3516 xlen = XDR_QUADLEN(len);
3517 if (end - p < xlen + 1)
3518 goto short_pkt;
3519 dprintk("filename = %*s\n", len, (char *)p);
3520 p += xlen;
3521 len = ntohl(*p++); /* bitmap length */
3522 if (end - p < len + 1)
3523 goto short_pkt;
3524 p += len;
3525 attrlen = XDR_QUADLEN(ntohl(*p++));
3526 if (end - p < attrlen + 2)
3527 goto short_pkt;
3528 p += attrlen; /* attributes */
3529 entry = p;
3530 }
3531 if (!nr && (entry[0] != 0 || entry[1] == 0))
3532 goto short_pkt;
3533 out:
3534 kunmap_atomic(kaddr, KM_USER0);
3535 return 0;
3536 short_pkt:
3537 dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3538 entry[0] = entry[1] = 0;
3539 /* truncate listing ? */
3540 if (!nr) {
3541 dprintk("NFS: readdir reply truncated!\n");
3542 entry[1] = 1;
3543 }
3544 goto out;
3545 err_unmap:
3546 kunmap_atomic(kaddr, KM_USER0);
3547 return -errno_NFSERR_IO;
3548 }
3549
3550 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3551 {
3552 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3553 struct kvec *iov = rcvbuf->head;
3554 int hdrlen, len, recvd;
3555 __be32 *p;
3556 char *kaddr;
3557 int status;
3558
3559 status = decode_op_hdr(xdr, OP_READLINK);
3560 if (status)
3561 return status;
3562
3563 /* Convert length of symlink */
3564 READ_BUF(4);
3565 READ32(len);
3566 if (len >= rcvbuf->page_len || len <= 0) {
3567 dprintk("nfs: server returned giant symlink!\n");
3568 return -ENAMETOOLONG;
3569 }
3570 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3571 recvd = req->rq_rcv_buf.len - hdrlen;
3572 if (recvd < len) {
3573 dprintk("NFS: server cheating in readlink reply: "
3574 "count %u > recvd %u\n", len, recvd);
3575 return -EIO;
3576 }
3577 xdr_read_pages(xdr, len);
3578 /*
3579 * The XDR encode routine has set things up so that
3580 * the link text will be copied directly into the
3581 * buffer. We just have to do overflow-checking,
3582 * and and null-terminate the text (the VFS expects
3583 * null-termination).
3584 */
3585 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3586 kaddr[len+rcvbuf->page_base] = '\0';
3587 kunmap_atomic(kaddr, KM_USER0);
3588 return 0;
3589 }
3590
3591 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3592 {
3593 int status;
3594
3595 status = decode_op_hdr(xdr, OP_REMOVE);
3596 if (status)
3597 goto out;
3598 status = decode_change_info(xdr, cinfo);
3599 out:
3600 return status;
3601 }
3602
3603 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3604 struct nfs4_change_info *new_cinfo)
3605 {
3606 int status;
3607
3608 status = decode_op_hdr(xdr, OP_RENAME);
3609 if (status)
3610 goto out;
3611 if ((status = decode_change_info(xdr, old_cinfo)))
3612 goto out;
3613 status = decode_change_info(xdr, new_cinfo);
3614 out:
3615 return status;
3616 }
3617
3618 static int decode_renew(struct xdr_stream *xdr)
3619 {
3620 return decode_op_hdr(xdr, OP_RENEW);
3621 }
3622
3623 static int
3624 decode_restorefh(struct xdr_stream *xdr)
3625 {
3626 return decode_op_hdr(xdr, OP_RESTOREFH);
3627 }
3628
3629 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3630 size_t *acl_len)
3631 {
3632 __be32 *savep;
3633 uint32_t attrlen,
3634 bitmap[2] = {0};
3635 struct kvec *iov = req->rq_rcv_buf.head;
3636 int status;
3637
3638 *acl_len = 0;
3639 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3640 goto out;
3641 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3642 goto out;
3643 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3644 goto out;
3645
3646 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3647 return -EIO;
3648 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3649 int hdrlen, recvd;
3650
3651 /* We ignore &savep and don't do consistency checks on
3652 * the attr length. Let userspace figure it out.... */
3653 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3654 recvd = req->rq_rcv_buf.len - hdrlen;
3655 if (attrlen > recvd) {
3656 dprintk("NFS: server cheating in getattr"
3657 " acl reply: attrlen %u > recvd %u\n",
3658 attrlen, recvd);
3659 return -EINVAL;
3660 }
3661 xdr_read_pages(xdr, attrlen);
3662 *acl_len = attrlen;
3663 } else
3664 status = -EOPNOTSUPP;
3665
3666 out:
3667 return status;
3668 }
3669
3670 static int
3671 decode_savefh(struct xdr_stream *xdr)
3672 {
3673 return decode_op_hdr(xdr, OP_SAVEFH);
3674 }
3675
3676 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3677 {
3678 __be32 *p;
3679 uint32_t bmlen;
3680 int status;
3681
3682
3683 status = decode_op_hdr(xdr, OP_SETATTR);
3684 if (status)
3685 return status;
3686 READ_BUF(4);
3687 READ32(bmlen);
3688 READ_BUF(bmlen << 2);
3689 return 0;
3690 }
3691
3692 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3693 {
3694 __be32 *p;
3695 uint32_t opnum;
3696 int32_t nfserr;
3697
3698 READ_BUF(8);
3699 READ32(opnum);
3700 if (opnum != OP_SETCLIENTID) {
3701 dprintk("nfs: decode_setclientid: Server returned operation"
3702 " %d\n", opnum);
3703 return -EIO;
3704 }
3705 READ32(nfserr);
3706 if (nfserr == NFS_OK) {
3707 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3708 READ64(clp->cl_clientid);
3709 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3710 } else if (nfserr == NFSERR_CLID_INUSE) {
3711 uint32_t len;
3712
3713 /* skip netid string */
3714 READ_BUF(4);
3715 READ32(len);
3716 READ_BUF(len);
3717
3718 /* skip uaddr string */
3719 READ_BUF(4);
3720 READ32(len);
3721 READ_BUF(len);
3722 return -NFSERR_CLID_INUSE;
3723 } else
3724 return -nfs4_stat_to_errno(nfserr);
3725
3726 return 0;
3727 }
3728
3729 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3730 {
3731 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3732 }
3733
3734 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3735 {
3736 __be32 *p;
3737 int status;
3738
3739 status = decode_op_hdr(xdr, OP_WRITE);
3740 if (status)
3741 return status;
3742
3743 READ_BUF(16);
3744 READ32(res->count);
3745 READ32(res->verf->committed);
3746 COPYMEM(res->verf->verifier, 8);
3747 return 0;
3748 }
3749
3750 static int decode_delegreturn(struct xdr_stream *xdr)
3751 {
3752 return decode_op_hdr(xdr, OP_DELEGRETURN);
3753 }
3754
3755 /*
3756 * Decode OPEN_DOWNGRADE response
3757 */
3758 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3759 {
3760 struct xdr_stream xdr;
3761 struct compound_hdr hdr;
3762 int status;
3763
3764 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3765 status = decode_compound_hdr(&xdr, &hdr);
3766 if (status)
3767 goto out;
3768 status = decode_putfh(&xdr);
3769 if (status)
3770 goto out;
3771 status = decode_open_downgrade(&xdr, res);
3772 if (status != 0)
3773 goto out;
3774 decode_getfattr(&xdr, res->fattr, res->server);
3775 out:
3776 return status;
3777 }
3778
3779 /*
3780 * END OF "GENERIC" DECODE ROUTINES.
3781 */
3782
3783 /*
3784 * Decode ACCESS response
3785 */
3786 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3787 {
3788 struct xdr_stream xdr;
3789 struct compound_hdr hdr;
3790 int status;
3791
3792 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3793 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3794 goto out;
3795 status = decode_putfh(&xdr);
3796 if (status != 0)
3797 goto out;
3798 status = decode_access(&xdr, res);
3799 if (status != 0)
3800 goto out;
3801 decode_getfattr(&xdr, res->fattr, res->server);
3802 out:
3803 return status;
3804 }
3805
3806 /*
3807 * Decode LOOKUP response
3808 */
3809 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3810 {
3811 struct xdr_stream xdr;
3812 struct compound_hdr hdr;
3813 int status;
3814
3815 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3816 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3817 goto out;
3818 if ((status = decode_putfh(&xdr)) != 0)
3819 goto out;
3820 if ((status = decode_lookup(&xdr)) != 0)
3821 goto out;
3822 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3823 goto out;
3824 status = decode_getfattr(&xdr, res->fattr, res->server);
3825 out:
3826 return status;
3827 }
3828
3829 /*
3830 * Decode LOOKUP_ROOT response
3831 */
3832 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3833 {
3834 struct xdr_stream xdr;
3835 struct compound_hdr hdr;
3836 int status;
3837
3838 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3839 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3840 goto out;
3841 if ((status = decode_putrootfh(&xdr)) != 0)
3842 goto out;
3843 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3844 status = decode_getfattr(&xdr, res->fattr, res->server);
3845 out:
3846 return status;
3847 }
3848
3849 /*
3850 * Decode REMOVE response
3851 */
3852 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3853 {
3854 struct xdr_stream xdr;
3855 struct compound_hdr hdr;
3856 int status;
3857
3858 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3859 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3860 goto out;
3861 if ((status = decode_putfh(&xdr)) != 0)
3862 goto out;
3863 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3864 goto out;
3865 decode_getfattr(&xdr, &res->dir_attr, res->server);
3866 out:
3867 return status;
3868 }
3869
3870 /*
3871 * Decode RENAME response
3872 */
3873 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3874 {
3875 struct xdr_stream xdr;
3876 struct compound_hdr hdr;
3877 int status;
3878
3879 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3880 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3881 goto out;
3882 if ((status = decode_putfh(&xdr)) != 0)
3883 goto out;
3884 if ((status = decode_savefh(&xdr)) != 0)
3885 goto out;
3886 if ((status = decode_putfh(&xdr)) != 0)
3887 goto out;
3888 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3889 goto out;
3890 /* Current FH is target directory */
3891 if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3892 goto out;
3893 if ((status = decode_restorefh(&xdr)) != 0)
3894 goto out;
3895 decode_getfattr(&xdr, res->old_fattr, res->server);
3896 out:
3897 return status;
3898 }
3899
3900 /*
3901 * Decode LINK response
3902 */
3903 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3904 {
3905 struct xdr_stream xdr;
3906 struct compound_hdr hdr;
3907 int status;
3908
3909 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3910 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3911 goto out;
3912 if ((status = decode_putfh(&xdr)) != 0)
3913 goto out;
3914 if ((status = decode_savefh(&xdr)) != 0)
3915 goto out;
3916 if ((status = decode_putfh(&xdr)) != 0)
3917 goto out;
3918 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3919 goto out;
3920 /*
3921 * Note order: OP_LINK leaves the directory as the current
3922 * filehandle.
3923 */
3924 if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3925 goto out;
3926 if ((status = decode_restorefh(&xdr)) != 0)
3927 goto out;
3928 decode_getfattr(&xdr, res->fattr, res->server);
3929 out:
3930 return status;
3931 }
3932
3933 /*
3934 * Decode CREATE response
3935 */
3936 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3937 {
3938 struct xdr_stream xdr;
3939 struct compound_hdr hdr;
3940 int status;
3941
3942 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3943 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3944 goto out;
3945 if ((status = decode_putfh(&xdr)) != 0)
3946 goto out;
3947 if ((status = decode_savefh(&xdr)) != 0)
3948 goto out;
3949 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3950 goto out;
3951 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3952 goto out;
3953 if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3954 goto out;
3955 if ((status = decode_restorefh(&xdr)) != 0)
3956 goto out;
3957 decode_getfattr(&xdr, res->dir_fattr, res->server);
3958 out:
3959 return status;
3960 }
3961
3962 /*
3963 * Decode SYMLINK response
3964 */
3965 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3966 {
3967 return nfs4_xdr_dec_create(rqstp, p, res);
3968 }
3969
3970 /*
3971 * Decode GETATTR response
3972 */
3973 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3974 {
3975 struct xdr_stream xdr;
3976 struct compound_hdr hdr;
3977 int status;
3978
3979 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3980 status = decode_compound_hdr(&xdr, &hdr);
3981 if (status)
3982 goto out;
3983 status = decode_putfh(&xdr);
3984 if (status)
3985 goto out;
3986 status = decode_getfattr(&xdr, res->fattr, res->server);
3987 out:
3988 return status;
3989
3990 }
3991
3992 /*
3993 * Encode an SETACL request
3994 */
3995 static int
3996 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3997 {
3998 struct xdr_stream xdr;
3999 struct compound_hdr hdr = {
4000 .nops = 2,
4001 };
4002 int status;
4003
4004 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4005 encode_compound_hdr(&xdr, &hdr);
4006 status = encode_putfh(&xdr, args->fh);
4007 if (status)
4008 goto out;
4009 status = encode_setacl(&xdr, args);
4010 out:
4011 return status;
4012 }
4013 /*
4014 * Decode SETACL response
4015 */
4016 static int
4017 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4018 {
4019 struct xdr_stream xdr;
4020 struct compound_hdr hdr;
4021 int status;
4022
4023 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4024 status = decode_compound_hdr(&xdr, &hdr);
4025 if (status)
4026 goto out;
4027 status = decode_putfh(&xdr);
4028 if (status)
4029 goto out;
4030 status = decode_setattr(&xdr, res);
4031 out:
4032 return status;
4033 }
4034
4035 /*
4036 * Decode GETACL response
4037 */
4038 static int
4039 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4040 {
4041 struct xdr_stream xdr;
4042 struct compound_hdr hdr;
4043 int status;
4044
4045 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4046 status = decode_compound_hdr(&xdr, &hdr);
4047 if (status)
4048 goto out;
4049 status = decode_putfh(&xdr);
4050 if (status)
4051 goto out;
4052 status = decode_getacl(&xdr, rqstp, acl_len);
4053
4054 out:
4055 return status;
4056 }
4057
4058 /*
4059 * Decode CLOSE response
4060 */
4061 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4062 {
4063 struct xdr_stream xdr;
4064 struct compound_hdr hdr;
4065 int status;
4066
4067 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4068 status = decode_compound_hdr(&xdr, &hdr);
4069 if (status)
4070 goto out;
4071 status = decode_putfh(&xdr);
4072 if (status)
4073 goto out;
4074 status = decode_close(&xdr, res);
4075 if (status != 0)
4076 goto out;
4077 /*
4078 * Note: Server may do delete on close for this file
4079 * in which case the getattr call will fail with
4080 * an ESTALE error. Shouldn't be a problem,
4081 * though, since fattr->valid will remain unset.
4082 */
4083 decode_getfattr(&xdr, res->fattr, res->server);
4084 out:
4085 return status;
4086 }
4087
4088 /*
4089 * Decode OPEN response
4090 */
4091 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4092 {
4093 struct xdr_stream xdr;
4094 struct compound_hdr hdr;
4095 int status;
4096
4097 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4098 status = decode_compound_hdr(&xdr, &hdr);
4099 if (status)
4100 goto out;
4101 status = decode_putfh(&xdr);
4102 if (status)
4103 goto out;
4104 status = decode_savefh(&xdr);
4105 if (status)
4106 goto out;
4107 status = decode_open(&xdr, res);
4108 if (status)
4109 goto out;
4110 if (decode_getfh(&xdr, &res->fh) != 0)
4111 goto out;
4112 if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4113 goto out;
4114 if (decode_restorefh(&xdr) != 0)
4115 goto out;
4116 decode_getfattr(&xdr, res->dir_attr, res->server);
4117 out:
4118 return status;
4119 }
4120
4121 /*
4122 * Decode OPEN_CONFIRM response
4123 */
4124 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4125 {
4126 struct xdr_stream xdr;
4127 struct compound_hdr hdr;
4128 int status;
4129
4130 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4131 status = decode_compound_hdr(&xdr, &hdr);
4132 if (status)
4133 goto out;
4134 status = decode_putfh(&xdr);
4135 if (status)
4136 goto out;
4137 status = decode_open_confirm(&xdr, res);
4138 out:
4139 return status;
4140 }
4141
4142 /*
4143 * Decode OPEN response
4144 */
4145 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4146 {
4147 struct xdr_stream xdr;
4148 struct compound_hdr hdr;
4149 int status;
4150
4151 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4152 status = decode_compound_hdr(&xdr, &hdr);
4153 if (status)
4154 goto out;
4155 status = decode_putfh(&xdr);
4156 if (status)
4157 goto out;
4158 status = decode_open(&xdr, res);
4159 if (status)
4160 goto out;
4161 decode_getfattr(&xdr, res->f_attr, res->server);
4162 out:
4163 return status;
4164 }
4165
4166 /*
4167 * Decode SETATTR response
4168 */
4169 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4170 {
4171 struct xdr_stream xdr;
4172 struct compound_hdr hdr;
4173 int status;
4174
4175 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4176 status = decode_compound_hdr(&xdr, &hdr);
4177 if (status)
4178 goto out;
4179 status = decode_putfh(&xdr);
4180 if (status)
4181 goto out;
4182 status = decode_setattr(&xdr, res);
4183 if (status)
4184 goto out;
4185 status = decode_getfattr(&xdr, res->fattr, res->server);
4186 if (status == NFS4ERR_DELAY)
4187 status = 0;
4188 out:
4189 return status;
4190 }
4191
4192 /*
4193 * Decode LOCK response
4194 */
4195 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4196 {
4197 struct xdr_stream xdr;
4198 struct compound_hdr hdr;
4199 int status;
4200
4201 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4202 status = decode_compound_hdr(&xdr, &hdr);
4203 if (status)
4204 goto out;
4205 status = decode_putfh(&xdr);
4206 if (status)
4207 goto out;
4208 status = decode_lock(&xdr, res);
4209 out:
4210 return status;
4211 }
4212
4213 /*
4214 * Decode LOCKT response
4215 */
4216 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4217 {
4218 struct xdr_stream xdr;
4219 struct compound_hdr hdr;
4220 int status;
4221
4222 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4223 status = decode_compound_hdr(&xdr, &hdr);
4224 if (status)
4225 goto out;
4226 status = decode_putfh(&xdr);
4227 if (status)
4228 goto out;
4229 status = decode_lockt(&xdr, res);
4230 out:
4231 return status;
4232 }
4233
4234 /*
4235 * Decode LOCKU response
4236 */
4237 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4238 {
4239 struct xdr_stream xdr;
4240 struct compound_hdr hdr;
4241 int status;
4242
4243 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4244 status = decode_compound_hdr(&xdr, &hdr);
4245 if (status)
4246 goto out;
4247 status = decode_putfh(&xdr);
4248 if (status)
4249 goto out;
4250 status = decode_locku(&xdr, res);
4251 out:
4252 return status;
4253 }
4254
4255 /*
4256 * Decode READLINK response
4257 */
4258 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4259 {
4260 struct xdr_stream xdr;
4261 struct compound_hdr hdr;
4262 int status;
4263
4264 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4265 status = decode_compound_hdr(&xdr, &hdr);
4266 if (status)
4267 goto out;
4268 status = decode_putfh(&xdr);
4269 if (status)
4270 goto out;
4271 status = decode_readlink(&xdr, rqstp);
4272 out:
4273 return status;
4274 }
4275
4276 /*
4277 * Decode READDIR response
4278 */
4279 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4280 {
4281 struct xdr_stream xdr;
4282 struct compound_hdr hdr;
4283 int status;
4284
4285 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4286 status = decode_compound_hdr(&xdr, &hdr);
4287 if (status)
4288 goto out;
4289 status = decode_putfh(&xdr);
4290 if (status)
4291 goto out;
4292 status = decode_readdir(&xdr, rqstp, res);
4293 out:
4294 return status;
4295 }
4296
4297 /*
4298 * Decode Read response
4299 */
4300 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4301 {
4302 struct xdr_stream xdr;
4303 struct compound_hdr hdr;
4304 int status;
4305
4306 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4307 status = decode_compound_hdr(&xdr, &hdr);
4308 if (status)
4309 goto out;
4310 status = decode_putfh(&xdr);
4311 if (status)
4312 goto out;
4313 status = decode_read(&xdr, rqstp, res);
4314 if (!status)
4315 status = res->count;
4316 out:
4317 return status;
4318 }
4319
4320 /*
4321 * Decode WRITE response
4322 */
4323 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4324 {
4325 struct xdr_stream xdr;
4326 struct compound_hdr hdr;
4327 int status;
4328
4329 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4330 status = decode_compound_hdr(&xdr, &hdr);
4331 if (status)
4332 goto out;
4333 status = decode_putfh(&xdr);
4334 if (status)
4335 goto out;
4336 status = decode_write(&xdr, res);
4337 if (status)
4338 goto out;
4339 decode_getfattr(&xdr, res->fattr, res->server);
4340 if (!status)
4341 status = res->count;
4342 out:
4343 return status;
4344 }
4345
4346 /*
4347 * Decode COMMIT response
4348 */
4349 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4350 {
4351 struct xdr_stream xdr;
4352 struct compound_hdr hdr;
4353 int status;
4354
4355 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4356 status = decode_compound_hdr(&xdr, &hdr);
4357 if (status)
4358 goto out;
4359 status = decode_putfh(&xdr);
4360 if (status)
4361 goto out;
4362 status = decode_commit(&xdr, res);
4363 if (status)
4364 goto out;
4365 decode_getfattr(&xdr, res->fattr, res->server);
4366 out:
4367 return status;
4368 }
4369
4370 /*
4371 * FSINFO request
4372 */
4373 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4374 {
4375 struct xdr_stream xdr;
4376 struct compound_hdr hdr;
4377 int status;
4378
4379 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4380 status = decode_compound_hdr(&xdr, &hdr);
4381 if (!status)
4382 status = decode_putfh(&xdr);
4383 if (!status)
4384 status = decode_fsinfo(&xdr, fsinfo);
4385 if (!status)
4386 status = -nfs4_stat_to_errno(hdr.status);
4387 return status;
4388 }
4389
4390 /*
4391 * PATHCONF request
4392 */
4393 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4394 {
4395 struct xdr_stream xdr;
4396 struct compound_hdr hdr;
4397 int status;
4398
4399 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4400 status = decode_compound_hdr(&xdr, &hdr);
4401 if (!status)
4402 status = decode_putfh(&xdr);
4403 if (!status)
4404 status = decode_pathconf(&xdr, pathconf);
4405 return status;
4406 }
4407
4408 /*
4409 * STATFS request
4410 */
4411 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4412 {
4413 struct xdr_stream xdr;
4414 struct compound_hdr hdr;
4415 int status;
4416
4417 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4418 status = decode_compound_hdr(&xdr, &hdr);
4419 if (!status)
4420 status = decode_putfh(&xdr);
4421 if (!status)
4422 status = decode_statfs(&xdr, fsstat);
4423 return status;
4424 }
4425
4426 /*
4427 * GETATTR_BITMAP request
4428 */
4429 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4430 {
4431 struct xdr_stream xdr;
4432 struct compound_hdr hdr;
4433 int status;
4434
4435 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4436 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4437 goto out;
4438 if ((status = decode_putfh(&xdr)) != 0)
4439 goto out;
4440 status = decode_server_caps(&xdr, res);
4441 out:
4442 return status;
4443 }
4444
4445 /*
4446 * Decode RENEW response
4447 */
4448 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4449 {
4450 struct xdr_stream xdr;
4451 struct compound_hdr hdr;
4452 int status;
4453
4454 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4455 status = decode_compound_hdr(&xdr, &hdr);
4456 if (!status)
4457 status = decode_renew(&xdr);
4458 return status;
4459 }
4460
4461 /*
4462 * a SETCLIENTID request
4463 */
4464 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4465 struct nfs_client *clp)
4466 {
4467 struct xdr_stream xdr;
4468 struct compound_hdr hdr;
4469 int status;
4470
4471 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4472 status = decode_compound_hdr(&xdr, &hdr);
4473 if (!status)
4474 status = decode_setclientid(&xdr, clp);
4475 if (!status)
4476 status = -nfs4_stat_to_errno(hdr.status);
4477 return status;
4478 }
4479
4480 /*
4481 * a SETCLIENTID_CONFIRM request
4482 */
4483 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4484 {
4485 struct xdr_stream xdr;
4486 struct compound_hdr hdr;
4487 int status;
4488
4489 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4490 status = decode_compound_hdr(&xdr, &hdr);
4491 if (!status)
4492 status = decode_setclientid_confirm(&xdr);
4493 if (!status)
4494 status = decode_putrootfh(&xdr);
4495 if (!status)
4496 status = decode_fsinfo(&xdr, fsinfo);
4497 if (!status)
4498 status = -nfs4_stat_to_errno(hdr.status);
4499 return status;
4500 }
4501
4502 /*
4503 * DELEGRETURN request
4504 */
4505 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4506 {
4507 struct xdr_stream xdr;
4508 struct compound_hdr hdr;
4509 int status;
4510
4511 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4512 status = decode_compound_hdr(&xdr, &hdr);
4513 if (status != 0)
4514 goto out;
4515 status = decode_putfh(&xdr);
4516 if (status != 0)
4517 goto out;
4518 status = decode_delegreturn(&xdr);
4519 decode_getfattr(&xdr, res->fattr, res->server);
4520 out:
4521 return status;
4522 }
4523
4524 /*
4525 * FS_LOCATIONS request
4526 */
4527 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4528 {
4529 struct xdr_stream xdr;
4530 struct compound_hdr hdr;
4531 int status;
4532
4533 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4534 status = decode_compound_hdr(&xdr, &hdr);
4535 if (status != 0)
4536 goto out;
4537 if ((status = decode_putfh(&xdr)) != 0)
4538 goto out;
4539 if ((status = decode_lookup(&xdr)) != 0)
4540 goto out;
4541 xdr_enter_page(&xdr, PAGE_SIZE);
4542 status = decode_getfattr(&xdr, &res->fattr, res->server);
4543 out:
4544 return status;
4545 }
4546
4547 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4548 {
4549 uint32_t bitmap[2] = {0};
4550 uint32_t len;
4551
4552 if (!*p++) {
4553 if (!*p)
4554 return ERR_PTR(-EAGAIN);
4555 entry->eof = 1;
4556 return ERR_PTR(-EBADCOOKIE);
4557 }
4558
4559 entry->prev_cookie = entry->cookie;
4560 p = xdr_decode_hyper(p, &entry->cookie);
4561 entry->len = ntohl(*p++);
4562 entry->name = (const char *) p;
4563 p += XDR_QUADLEN(entry->len);
4564
4565 /*
4566 * In case the server doesn't return an inode number,
4567 * we fake one here. (We don't use inode number 0,
4568 * since glibc seems to choke on it...)
4569 */
4570 entry->ino = 1;
4571
4572 len = ntohl(*p++); /* bitmap length */
4573 if (len-- > 0) {
4574 bitmap[0] = ntohl(*p++);
4575 if (len-- > 0) {
4576 bitmap[1] = ntohl(*p++);
4577 p += len;
4578 }
4579 }
4580 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4581 if (len > 0) {
4582 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4583 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4584 /* Ignore the return value of rdattr_error for now */
4585 p++;
4586 len--;
4587 }
4588 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4589 xdr_decode_hyper(p, &entry->ino);
4590 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4591 xdr_decode_hyper(p, &entry->ino);
4592 p += len;
4593 }
4594
4595 entry->eof = !p[0] && p[1];
4596 return p;
4597 }
4598
4599 /*
4600 * We need to translate between nfs status return values and
4601 * the local errno values which may not be the same.
4602 */
4603 static struct {
4604 int stat;
4605 int errno;
4606 } nfs_errtbl[] = {
4607 { NFS4_OK, 0 },
4608 { NFS4ERR_PERM, EPERM },
4609 { NFS4ERR_NOENT, ENOENT },
4610 { NFS4ERR_IO, errno_NFSERR_IO },
4611 { NFS4ERR_NXIO, ENXIO },
4612 { NFS4ERR_ACCESS, EACCES },
4613 { NFS4ERR_EXIST, EEXIST },
4614 { NFS4ERR_XDEV, EXDEV },
4615 { NFS4ERR_NOTDIR, ENOTDIR },
4616 { NFS4ERR_ISDIR, EISDIR },
4617 { NFS4ERR_INVAL, EINVAL },
4618 { NFS4ERR_FBIG, EFBIG },
4619 { NFS4ERR_NOSPC, ENOSPC },
4620 { NFS4ERR_ROFS, EROFS },
4621 { NFS4ERR_MLINK, EMLINK },
4622 { NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
4623 { NFS4ERR_NOTEMPTY, ENOTEMPTY },
4624 { NFS4ERR_DQUOT, EDQUOT },
4625 { NFS4ERR_STALE, ESTALE },
4626 { NFS4ERR_BADHANDLE, EBADHANDLE },
4627 { NFS4ERR_BADOWNER, EINVAL },
4628 { NFS4ERR_BADNAME, EINVAL },
4629 { NFS4ERR_BAD_COOKIE, EBADCOOKIE },
4630 { NFS4ERR_NOTSUPP, ENOTSUPP },
4631 { NFS4ERR_TOOSMALL, ETOOSMALL },
4632 { NFS4ERR_SERVERFAULT, ESERVERFAULT },
4633 { NFS4ERR_BADTYPE, EBADTYPE },
4634 { NFS4ERR_LOCKED, EAGAIN },
4635 { NFS4ERR_RESOURCE, EREMOTEIO },
4636 { NFS4ERR_SYMLINK, ELOOP },
4637 { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
4638 { NFS4ERR_DEADLOCK, EDEADLK },
4639 { NFS4ERR_WRONGSEC, EPERM }, /* FIXME: this needs
4640 * to be handled by a
4641 * middle-layer.
4642 */
4643 { -1, EIO }
4644 };
4645
4646 /*
4647 * Convert an NFS error code to a local one.
4648 * This one is used jointly by NFSv2 and NFSv3.
4649 */
4650 static int
4651 nfs4_stat_to_errno(int stat)
4652 {
4653 int i;
4654 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4655 if (nfs_errtbl[i].stat == stat)
4656 return nfs_errtbl[i].errno;
4657 }
4658 if (stat <= 10000 || stat > 10100) {
4659 /* The server is looney tunes. */
4660 return ESERVERFAULT;
4661 }
4662 /* If we cannot translate the error, the recovery routines should
4663 * handle it.
4664 * Note: remaining NFSv4 error codes have values > 10000, so should
4665 * not conflict with native Linux error codes.
4666 */
4667 return stat;
4668 }
4669
4670 #define PROC(proc, argtype, restype) \
4671 [NFSPROC4_CLNT_##proc] = { \
4672 .p_proc = NFSPROC4_COMPOUND, \
4673 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4674 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
4675 .p_arglen = NFS4_##argtype##_sz, \
4676 .p_replen = NFS4_##restype##_sz, \
4677 .p_statidx = NFSPROC4_CLNT_##proc, \
4678 .p_name = #proc, \
4679 }
4680
4681 struct rpc_procinfo nfs4_procedures[] = {
4682 PROC(READ, enc_read, dec_read),
4683 PROC(WRITE, enc_write, dec_write),
4684 PROC(COMMIT, enc_commit, dec_commit),
4685 PROC(OPEN, enc_open, dec_open),
4686 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4687 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4688 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4689 PROC(CLOSE, enc_close, dec_close),
4690 PROC(SETATTR, enc_setattr, dec_setattr),
4691 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4692 PROC(RENEW, enc_renew, dec_renew),
4693 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4694 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4695 PROC(LOCK, enc_lock, dec_lock),
4696 PROC(LOCKT, enc_lockt, dec_lockt),
4697 PROC(LOCKU, enc_locku, dec_locku),
4698 PROC(ACCESS, enc_access, dec_access),
4699 PROC(GETATTR, enc_getattr, dec_getattr),
4700 PROC(LOOKUP, enc_lookup, dec_lookup),
4701 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4702 PROC(REMOVE, enc_remove, dec_remove),
4703 PROC(RENAME, enc_rename, dec_rename),
4704 PROC(LINK, enc_link, dec_link),
4705 PROC(SYMLINK, enc_symlink, dec_symlink),
4706 PROC(CREATE, enc_create, dec_create),
4707 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4708 PROC(STATFS, enc_statfs, dec_statfs),
4709 PROC(READLINK, enc_readlink, dec_readlink),
4710 PROC(READDIR, enc_readdir, dec_readdir),
4711 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4712 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
4713 PROC(GETACL, enc_getacl, dec_getacl),
4714 PROC(SETACL, enc_setacl, dec_setacl),
4715 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
4716 };
4717
4718 struct rpc_version nfs_version4 = {
4719 .number = 4,
4720 .nrprocs = ARRAY_SIZE(nfs4_procedures),
4721 .procs = nfs4_procedures
4722 };
4723
4724 /*
4725 * Local variables:
4726 * c-basic-offset: 8
4727 * End:
4728 */
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