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Linux 2.6.28-rc5
[cris-mirror.git] / fs / nfs / nfs4xdr.c
blobb916297d233461c84a7ce3d8b6a49ea52252dee0
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 (encode_getattr_maxsz)
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 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
120 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
121 1 /* sc_prog */ + \
122 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
123 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
124 1) /* sc_cb_ident */
125 #define decode_setclientid_maxsz \
126 (op_decode_hdr_maxsz + \
127 2 + \
128 1024) /* large value for CLID_INUSE */
129 #define encode_setclientid_confirm_maxsz \
130 (op_encode_hdr_maxsz + \
131 3 + (NFS4_VERIFIER_SIZE >> 2))
132 #define decode_setclientid_confirm_maxsz \
133 (op_decode_hdr_maxsz)
134 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
135 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
136 #define encode_share_access_maxsz \
137 (2)
138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
139 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
141 #define encode_open_maxsz (op_encode_hdr_maxsz + \
142 2 + encode_share_access_maxsz + 2 + \
143 open_owner_id_maxsz + \
144 encode_opentype_maxsz + \
145 encode_claim_null_maxsz)
146 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
148 decode_ace_maxsz)
149 #define decode_change_info_maxsz (5)
150 #define decode_open_maxsz (op_decode_hdr_maxsz + \
151 decode_stateid_maxsz + \
152 decode_change_info_maxsz + 1 + \
153 nfs4_fattr_bitmap_maxsz + \
154 decode_delegation_maxsz)
155 #define encode_open_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 encode_stateid_maxsz + 1)
158 #define decode_open_confirm_maxsz \
159 (op_decode_hdr_maxsz + \
160 decode_stateid_maxsz)
161 #define encode_open_downgrade_maxsz \
162 (op_encode_hdr_maxsz + \
163 encode_stateid_maxsz + 1 + \
164 encode_share_access_maxsz)
165 #define decode_open_downgrade_maxsz \
166 (op_decode_hdr_maxsz + \
167 decode_stateid_maxsz)
168 #define encode_close_maxsz (op_encode_hdr_maxsz + \
169 1 + encode_stateid_maxsz)
170 #define decode_close_maxsz (op_decode_hdr_maxsz + \
171 decode_stateid_maxsz)
172 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
173 encode_stateid_maxsz + \
174 encode_attrs_maxsz)
175 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
176 nfs4_fattr_bitmap_maxsz)
177 #define encode_read_maxsz (op_encode_hdr_maxsz + \
178 encode_stateid_maxsz + 3)
179 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
180 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
181 2 + encode_verifier_maxsz + 5)
182 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
183 decode_verifier_maxsz)
184 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
185 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
186 #define encode_write_maxsz (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 4)
188 #define decode_write_maxsz (op_decode_hdr_maxsz + \
189 2 + decode_verifier_maxsz)
190 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
191 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
192 decode_verifier_maxsz)
193 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
194 nfs4_name_maxsz)
195 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
196 2 * nfs4_name_maxsz)
197 #define decode_rename_maxsz (op_decode_hdr_maxsz + 5 + 5)
198 #define encode_link_maxsz (op_encode_hdr_maxsz + \
199 nfs4_name_maxsz)
200 #define decode_link_maxsz (op_decode_hdr_maxsz + 5)
201 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
202 7 + \
203 1 + encode_stateid_maxsz + 8)
204 #define decode_lock_denied_maxsz \
205 (8 + decode_lockowner_maxsz)
206 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
207 decode_lock_denied_maxsz)
208 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 12)
209 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
210 decode_lock_denied_maxsz)
211 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
212 encode_stateid_maxsz + \
213 4)
214 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
215 decode_stateid_maxsz)
216 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
217 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
218 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
219 1 + nfs4_name_maxsz + \
220 1 + \
221 nfs4_fattr_maxsz)
222 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
223 #define encode_create_maxsz (op_encode_hdr_maxsz + \
224 1 + 2 + nfs4_name_maxsz + \
225 encode_attrs_maxsz)
226 #define decode_create_maxsz (op_decode_hdr_maxsz + \
227 decode_change_info_maxsz + \
228 nfs4_fattr_bitmap_maxsz)
229 #define encode_statfs_maxsz (encode_getattr_maxsz)
230 #define decode_statfs_maxsz (decode_getattr_maxsz)
231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
233 #define encode_getacl_maxsz (encode_getattr_maxsz)
234 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
235 nfs4_fattr_bitmap_maxsz + 1)
236 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
237 encode_stateid_maxsz + 3)
238 #define decode_setacl_maxsz (decode_setattr_maxsz)
239 #define encode_fs_locations_maxsz \
240 (encode_getattr_maxsz)
241 #define decode_fs_locations_maxsz \
242 (0)
243 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
244 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
245 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
246 encode_putfh_maxsz + \
247 encode_read_maxsz)
248 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
249 decode_putfh_maxsz + \
250 decode_read_maxsz)
251 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
252 encode_putfh_maxsz + \
253 encode_readlink_maxsz)
254 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
255 decode_putfh_maxsz + \
256 decode_readlink_maxsz)
257 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
258 encode_putfh_maxsz + \
259 encode_readdir_maxsz)
260 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
261 decode_putfh_maxsz + \
262 decode_readdir_maxsz)
263 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
264 encode_putfh_maxsz + \
265 encode_write_maxsz + \
266 encode_getattr_maxsz)
267 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
268 decode_putfh_maxsz + \
269 decode_write_maxsz + \
270 decode_getattr_maxsz)
271 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
272 encode_putfh_maxsz + \
273 encode_commit_maxsz + \
274 encode_getattr_maxsz)
275 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
276 decode_putfh_maxsz + \
277 decode_commit_maxsz + \
278 decode_getattr_maxsz)
279 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
280 encode_putfh_maxsz + \
281 encode_savefh_maxsz + \
282 encode_open_maxsz + \
283 encode_getfh_maxsz + \
284 encode_getattr_maxsz + \
285 encode_restorefh_maxsz + \
286 encode_getattr_maxsz)
287 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
288 decode_putfh_maxsz + \
289 decode_savefh_maxsz + \
290 decode_open_maxsz + \
291 decode_getfh_maxsz + \
292 decode_getattr_maxsz + \
293 decode_restorefh_maxsz + \
294 decode_getattr_maxsz)
295 #define NFS4_enc_open_confirm_sz \
296 (compound_encode_hdr_maxsz + \
297 encode_putfh_maxsz + \
298 encode_open_confirm_maxsz)
299 #define NFS4_dec_open_confirm_sz \
300 (compound_decode_hdr_maxsz + \
301 decode_putfh_maxsz + \
302 decode_open_confirm_maxsz)
303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
304 encode_putfh_maxsz + \
305 encode_open_maxsz + \
306 encode_getattr_maxsz)
307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
308 decode_putfh_maxsz + \
309 decode_open_maxsz + \
310 decode_getattr_maxsz)
311 #define NFS4_enc_open_downgrade_sz \
312 (compound_encode_hdr_maxsz + \
313 encode_putfh_maxsz + \
314 encode_open_downgrade_maxsz + \
315 encode_getattr_maxsz)
316 #define NFS4_dec_open_downgrade_sz \
317 (compound_decode_hdr_maxsz + \
318 decode_putfh_maxsz + \
319 decode_open_downgrade_maxsz + \
320 decode_getattr_maxsz)
321 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
322 encode_putfh_maxsz + \
323 encode_close_maxsz + \
324 encode_getattr_maxsz)
325 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
326 decode_putfh_maxsz + \
327 decode_close_maxsz + \
328 decode_getattr_maxsz)
329 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
330 encode_putfh_maxsz + \
331 encode_setattr_maxsz + \
332 encode_getattr_maxsz)
333 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
334 decode_putfh_maxsz + \
335 decode_setattr_maxsz + \
336 decode_getattr_maxsz)
337 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
338 encode_putfh_maxsz + \
339 encode_fsinfo_maxsz)
340 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
341 decode_putfh_maxsz + \
342 decode_fsinfo_maxsz)
343 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
344 encode_renew_maxsz)
345 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
346 decode_renew_maxsz)
347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
348 encode_setclientid_maxsz)
349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
350 decode_setclientid_maxsz)
351 #define NFS4_enc_setclientid_confirm_sz \
352 (compound_encode_hdr_maxsz + \
353 encode_setclientid_confirm_maxsz + \
354 encode_putrootfh_maxsz + \
355 encode_fsinfo_maxsz)
356 #define NFS4_dec_setclientid_confirm_sz \
357 (compound_decode_hdr_maxsz + \
358 decode_setclientid_confirm_maxsz + \
359 decode_putrootfh_maxsz + \
360 decode_fsinfo_maxsz)
361 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
362 encode_putfh_maxsz + \
363 encode_lock_maxsz)
364 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
365 decode_putfh_maxsz + \
366 decode_lock_maxsz)
367 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
368 encode_putfh_maxsz + \
369 encode_lockt_maxsz)
370 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
371 decode_putfh_maxsz + \
372 decode_lockt_maxsz)
373 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
374 encode_putfh_maxsz + \
375 encode_locku_maxsz)
376 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
377 decode_putfh_maxsz + \
378 decode_locku_maxsz)
379 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
380 encode_putfh_maxsz + \
381 encode_access_maxsz + \
382 encode_getattr_maxsz)
383 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
384 decode_putfh_maxsz + \
385 decode_access_maxsz + \
386 decode_getattr_maxsz)
387 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
388 encode_putfh_maxsz + \
389 encode_getattr_maxsz)
390 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
391 decode_putfh_maxsz + \
392 decode_getattr_maxsz)
393 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
394 encode_putfh_maxsz + \
395 encode_lookup_maxsz + \
396 encode_getattr_maxsz + \
397 encode_getfh_maxsz)
398 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
399 decode_putfh_maxsz + \
400 decode_lookup_maxsz + \
401 decode_getattr_maxsz + \
402 decode_getfh_maxsz)
403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
404 encode_putrootfh_maxsz + \
405 encode_getattr_maxsz + \
406 encode_getfh_maxsz)
407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
408 decode_putrootfh_maxsz + \
409 decode_getattr_maxsz + \
410 decode_getfh_maxsz)
411 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
412 encode_putfh_maxsz + \
413 encode_remove_maxsz + \
414 encode_getattr_maxsz)
415 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
416 decode_putfh_maxsz + \
417 op_decode_hdr_maxsz + 5 + \
418 decode_getattr_maxsz)
419 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
420 encode_putfh_maxsz + \
421 encode_savefh_maxsz + \
422 encode_putfh_maxsz + \
423 encode_rename_maxsz + \
424 encode_getattr_maxsz + \
425 encode_restorefh_maxsz + \
426 encode_getattr_maxsz)
427 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
428 decode_putfh_maxsz + \
429 decode_savefh_maxsz + \
430 decode_putfh_maxsz + \
431 decode_rename_maxsz + \
432 decode_getattr_maxsz + \
433 decode_restorefh_maxsz + \
434 decode_getattr_maxsz)
435 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
436 encode_putfh_maxsz + \
437 encode_savefh_maxsz + \
438 encode_putfh_maxsz + \
439 encode_link_maxsz + \
440 decode_getattr_maxsz + \
441 encode_restorefh_maxsz + \
442 decode_getattr_maxsz)
443 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
444 decode_putfh_maxsz + \
445 decode_savefh_maxsz + \
446 decode_putfh_maxsz + \
447 decode_link_maxsz + \
448 decode_getattr_maxsz + \
449 decode_restorefh_maxsz + \
450 decode_getattr_maxsz)
451 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
452 encode_putfh_maxsz + \
453 encode_symlink_maxsz + \
454 encode_getattr_maxsz + \
455 encode_getfh_maxsz)
456 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
457 decode_putfh_maxsz + \
458 decode_symlink_maxsz + \
459 decode_getattr_maxsz + \
460 decode_getfh_maxsz)
461 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
462 encode_putfh_maxsz + \
463 encode_savefh_maxsz + \
464 encode_create_maxsz + \
465 encode_getfh_maxsz + \
466 encode_getattr_maxsz + \
467 encode_restorefh_maxsz + \
468 encode_getattr_maxsz)
469 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
470 decode_putfh_maxsz + \
471 decode_savefh_maxsz + \
472 decode_create_maxsz + \
473 decode_getfh_maxsz + \
474 decode_getattr_maxsz + \
475 decode_restorefh_maxsz + \
476 decode_getattr_maxsz)
477 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
478 encode_putfh_maxsz + \
479 encode_getattr_maxsz)
480 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
481 decode_putfh_maxsz + \
482 decode_getattr_maxsz)
483 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
484 encode_putfh_maxsz + \
485 encode_statfs_maxsz)
486 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
487 decode_putfh_maxsz + \
488 decode_statfs_maxsz)
489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
490 encode_putfh_maxsz + \
491 encode_getattr_maxsz)
492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
493 decode_putfh_maxsz + \
494 decode_getattr_maxsz)
495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
496 encode_putfh_maxsz + \
497 encode_delegreturn_maxsz + \
498 encode_getattr_maxsz)
499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
500 decode_delegreturn_maxsz + \
501 decode_getattr_maxsz)
502 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
503 encode_putfh_maxsz + \
504 encode_getacl_maxsz)
505 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
506 decode_putfh_maxsz + \
507 decode_getacl_maxsz)
508 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
509 encode_putfh_maxsz + \
510 encode_setacl_maxsz)
511 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
512 decode_putfh_maxsz + \
513 decode_setacl_maxsz)
514 #define NFS4_enc_fs_locations_sz \
515 (compound_encode_hdr_maxsz + \
516 encode_putfh_maxsz + \
517 encode_lookup_maxsz + \
518 encode_fs_locations_maxsz)
519 #define NFS4_dec_fs_locations_sz \
520 (compound_decode_hdr_maxsz + \
521 decode_putfh_maxsz + \
522 decode_lookup_maxsz + \
523 decode_fs_locations_maxsz)
524
525 static struct {
526 unsigned int mode;
527 unsigned int nfs2type;
528 } nfs_type2fmt[] = {
529 { 0, NFNON },
530 { S_IFREG, NFREG },
531 { S_IFDIR, NFDIR },
532 { S_IFBLK, NFBLK },
533 { S_IFCHR, NFCHR },
534 { S_IFLNK, NFLNK },
535 { S_IFSOCK, NFSOCK },
536 { S_IFIFO, NFFIFO },
537 { 0, NFNON },
538 { 0, NFNON },
539 };
540
541 struct compound_hdr {
542 int32_t status;
543 uint32_t nops;
544 uint32_t taglen;
545 char * tag;
546 };
547
548 /*
549 * START OF "GENERIC" ENCODE ROUTINES.
550 * These may look a little ugly since they are imported from a "generic"
551 * set of XDR encode/decode routines which are intended to be shared by
552 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
553 *
554 * If the pain of reading these is too great, it should be a straightforward
555 * task to translate them into Linux-specific versions which are more
556 * consistent with the style used in NFSv2/v3...
557 */
558 #define WRITE32(n) *p++ = htonl(n)
559 #define WRITE64(n) do { \
560 *p++ = htonl((uint32_t)((n) >> 32)); \
561 *p++ = htonl((uint32_t)(n)); \
562 } while (0)
563 #define WRITEMEM(ptr,nbytes) do { \
564 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
565 } while (0)
566
567 #define RESERVE_SPACE(nbytes) do { \
568 p = xdr_reserve_space(xdr, nbytes); \
569 BUG_ON(!p); \
570 } while (0)
571
572 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
573 {
574 __be32 *p;
575
576 p = xdr_reserve_space(xdr, 4 + len);
577 BUG_ON(p == NULL);
578 xdr_encode_opaque(p, str, len);
579 }
580
581 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
582 {
583 __be32 *p;
584
585 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
586 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
587 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
588 WRITE32(hdr->taglen);
589 WRITEMEM(hdr->tag, hdr->taglen);
590 WRITE32(NFS4_MINOR_VERSION);
591 WRITE32(hdr->nops);
592 return 0;
593 }
594
595 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
596 {
597 __be32 *p;
598
599 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
600 BUG_ON(p == NULL);
601 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
602 }
603
604 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
605 {
606 char owner_name[IDMAP_NAMESZ];
607 char owner_group[IDMAP_NAMESZ];
608 int owner_namelen = 0;
609 int owner_grouplen = 0;
610 __be32 *p;
611 __be32 *q;
612 int len;
613 uint32_t bmval0 = 0;
614 uint32_t bmval1 = 0;
615 int status;
616
617 /*
618 * We reserve enough space to write the entire attribute buffer at once.
619 * In the worst-case, this would be
620 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
621 * = 36 bytes, plus any contribution from variable-length fields
622 * such as owner/group.
623 */
624 len = 16;
625
626 /* Sigh */
627 if (iap->ia_valid & ATTR_SIZE)
628 len += 8;
629 if (iap->ia_valid & ATTR_MODE)
630 len += 4;
631 if (iap->ia_valid & ATTR_UID) {
632 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
633 if (owner_namelen < 0) {
634 dprintk("nfs: couldn't resolve uid %d to string\n",
635 iap->ia_uid);
636 /* XXX */
637 strcpy(owner_name, "nobody");
638 owner_namelen = sizeof("nobody") - 1;
639 /* goto out; */
640 }
641 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
642 }
643 if (iap->ia_valid & ATTR_GID) {
644 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
645 if (owner_grouplen < 0) {
646 dprintk("nfs: couldn't resolve gid %d to string\n",
647 iap->ia_gid);
648 strcpy(owner_group, "nobody");
649 owner_grouplen = sizeof("nobody") - 1;
650 /* goto out; */
651 }
652 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
653 }
654 if (iap->ia_valid & ATTR_ATIME_SET)
655 len += 16;
656 else if (iap->ia_valid & ATTR_ATIME)
657 len += 4;
658 if (iap->ia_valid & ATTR_MTIME_SET)
659 len += 16;
660 else if (iap->ia_valid & ATTR_MTIME)
661 len += 4;
662 RESERVE_SPACE(len);
663
664 /*
665 * We write the bitmap length now, but leave the bitmap and the attribute
666 * buffer length to be backfilled at the end of this routine.
667 */
668 WRITE32(2);
669 q = p;
670 p += 3;
671
672 if (iap->ia_valid & ATTR_SIZE) {
673 bmval0 |= FATTR4_WORD0_SIZE;
674 WRITE64(iap->ia_size);
675 }
676 if (iap->ia_valid & ATTR_MODE) {
677 bmval1 |= FATTR4_WORD1_MODE;
678 WRITE32(iap->ia_mode & S_IALLUGO);
679 }
680 if (iap->ia_valid & ATTR_UID) {
681 bmval1 |= FATTR4_WORD1_OWNER;
682 WRITE32(owner_namelen);
683 WRITEMEM(owner_name, owner_namelen);
684 }
685 if (iap->ia_valid & ATTR_GID) {
686 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
687 WRITE32(owner_grouplen);
688 WRITEMEM(owner_group, owner_grouplen);
689 }
690 if (iap->ia_valid & ATTR_ATIME_SET) {
691 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
692 WRITE32(NFS4_SET_TO_CLIENT_TIME);
693 WRITE32(0);
694 WRITE32(iap->ia_mtime.tv_sec);
695 WRITE32(iap->ia_mtime.tv_nsec);
696 }
697 else if (iap->ia_valid & ATTR_ATIME) {
698 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
699 WRITE32(NFS4_SET_TO_SERVER_TIME);
700 }
701 if (iap->ia_valid & ATTR_MTIME_SET) {
702 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
703 WRITE32(NFS4_SET_TO_CLIENT_TIME);
704 WRITE32(0);
705 WRITE32(iap->ia_mtime.tv_sec);
706 WRITE32(iap->ia_mtime.tv_nsec);
707 }
708 else if (iap->ia_valid & ATTR_MTIME) {
709 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
710 WRITE32(NFS4_SET_TO_SERVER_TIME);
711 }
712
713 /*
714 * Now we backfill the bitmap and the attribute buffer length.
715 */
716 if (len != ((char *)p - (char *)q) + 4) {
717 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
718 len, ((char *)p - (char *)q) + 4);
719 BUG();
720 }
721 len = (char *)p - (char *)q - 12;
722 *q++ = htonl(bmval0);
723 *q++ = htonl(bmval1);
724 *q++ = htonl(len);
725
726 status = 0;
727 /* out: */
728 return status;
729 }
730
731 static int encode_access(struct xdr_stream *xdr, u32 access)
732 {
733 __be32 *p;
734
735 RESERVE_SPACE(8);
736 WRITE32(OP_ACCESS);
737 WRITE32(access);
738
739 return 0;
740 }
741
742 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
743 {
744 __be32 *p;
745
746 RESERVE_SPACE(8+NFS4_STATEID_SIZE);
747 WRITE32(OP_CLOSE);
748 WRITE32(arg->seqid->sequence->counter);
749 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
750
751 return 0;
752 }
753
754 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
755 {
756 __be32 *p;
757
758 RESERVE_SPACE(16);
759 WRITE32(OP_COMMIT);
760 WRITE64(args->offset);
761 WRITE32(args->count);
762
763 return 0;
764 }
765
766 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
767 {
768 __be32 *p;
769
770 RESERVE_SPACE(8);
771 WRITE32(OP_CREATE);
772 WRITE32(create->ftype);
773
774 switch (create->ftype) {
775 case NF4LNK:
776 RESERVE_SPACE(4);
777 WRITE32(create->u.symlink.len);
778 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
779 break;
780
781 case NF4BLK: case NF4CHR:
782 RESERVE_SPACE(8);
783 WRITE32(create->u.device.specdata1);
784 WRITE32(create->u.device.specdata2);
785 break;
786
787 default:
788 break;
789 }
790
791 RESERVE_SPACE(4 + create->name->len);
792 WRITE32(create->name->len);
793 WRITEMEM(create->name->name, create->name->len);
794
795 return encode_attrs(xdr, create->attrs, create->server);
796 }
797
798 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
799 {
800 __be32 *p;
801
802 RESERVE_SPACE(12);
803 WRITE32(OP_GETATTR);
804 WRITE32(1);
805 WRITE32(bitmap);
806 return 0;
807 }
808
809 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
810 {
811 __be32 *p;
812
813 RESERVE_SPACE(16);
814 WRITE32(OP_GETATTR);
815 WRITE32(2);
816 WRITE32(bm0);
817 WRITE32(bm1);
818 return 0;
819 }
820
821 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
822 {
823 return encode_getattr_two(xdr,
824 bitmask[0] & nfs4_fattr_bitmap[0],
825 bitmask[1] & nfs4_fattr_bitmap[1]);
826 }
827
828 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
829 {
830 return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
831 bitmask[1] & nfs4_fsinfo_bitmap[1]);
832 }
833
834 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
835 {
836 return encode_getattr_two(xdr,
837 bitmask[0] & nfs4_fs_locations_bitmap[0],
838 bitmask[1] & nfs4_fs_locations_bitmap[1]);
839 }
840
841 static int encode_getfh(struct xdr_stream *xdr)
842 {
843 __be32 *p;
844
845 RESERVE_SPACE(4);
846 WRITE32(OP_GETFH);
847
848 return 0;
849 }
850
851 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
852 {
853 __be32 *p;
854
855 RESERVE_SPACE(8 + name->len);
856 WRITE32(OP_LINK);
857 WRITE32(name->len);
858 WRITEMEM(name->name, name->len);
859
860 return 0;
861 }
862
863 static inline int nfs4_lock_type(struct file_lock *fl, int block)
864 {
865 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
866 return block ? NFS4_READW_LT : NFS4_READ_LT;
867 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
868 }
869
870 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
871 {
872 if (fl->fl_end == OFFSET_MAX)
873 return ~(uint64_t)0;
874 return fl->fl_end - fl->fl_start + 1;
875 }
876
877 /*
878 * opcode,type,reclaim,offset,length,new_lock_owner = 32
879 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
880 */
881 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
882 {
883 __be32 *p;
884
885 RESERVE_SPACE(32);
886 WRITE32(OP_LOCK);
887 WRITE32(nfs4_lock_type(args->fl, args->block));
888 WRITE32(args->reclaim);
889 WRITE64(args->fl->fl_start);
890 WRITE64(nfs4_lock_length(args->fl));
891 WRITE32(args->new_lock_owner);
892 if (args->new_lock_owner){
893 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
894 WRITE32(args->open_seqid->sequence->counter);
895 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
896 WRITE32(args->lock_seqid->sequence->counter);
897 WRITE64(args->lock_owner.clientid);
898 WRITE32(16);
899 WRITEMEM("lock id:", 8);
900 WRITE64(args->lock_owner.id);
901 }
902 else {
903 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
904 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
905 WRITE32(args->lock_seqid->sequence->counter);
906 }
907
908 return 0;
909 }
910
911 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
912 {
913 __be32 *p;
914
915 RESERVE_SPACE(52);
916 WRITE32(OP_LOCKT);
917 WRITE32(nfs4_lock_type(args->fl, 0));
918 WRITE64(args->fl->fl_start);
919 WRITE64(nfs4_lock_length(args->fl));
920 WRITE64(args->lock_owner.clientid);
921 WRITE32(16);
922 WRITEMEM("lock id:", 8);
923 WRITE64(args->lock_owner.id);
924
925 return 0;
926 }
927
928 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
929 {
930 __be32 *p;
931
932 RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
933 WRITE32(OP_LOCKU);
934 WRITE32(nfs4_lock_type(args->fl, 0));
935 WRITE32(args->seqid->sequence->counter);
936 WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
937 WRITE64(args->fl->fl_start);
938 WRITE64(nfs4_lock_length(args->fl));
939
940 return 0;
941 }
942
943 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
944 {
945 int len = name->len;
946 __be32 *p;
947
948 RESERVE_SPACE(8 + len);
949 WRITE32(OP_LOOKUP);
950 WRITE32(len);
951 WRITEMEM(name->name, len);
952
953 return 0;
954 }
955
956 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
957 {
958 __be32 *p;
959
960 RESERVE_SPACE(8);
961 switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
962 case FMODE_READ:
963 WRITE32(NFS4_SHARE_ACCESS_READ);
964 break;
965 case FMODE_WRITE:
966 WRITE32(NFS4_SHARE_ACCESS_WRITE);
967 break;
968 case FMODE_READ|FMODE_WRITE:
969 WRITE32(NFS4_SHARE_ACCESS_BOTH);
970 break;
971 default:
972 BUG();
973 }
974 WRITE32(0); /* for linux, share_deny = 0 always */
975 }
976
977 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
978 {
979 __be32 *p;
980 /*
981 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
982 * owner 4 = 32
983 */
984 RESERVE_SPACE(8);
985 WRITE32(OP_OPEN);
986 WRITE32(arg->seqid->sequence->counter);
987 encode_share_access(xdr, arg->open_flags);
988 RESERVE_SPACE(28);
989 WRITE64(arg->clientid);
990 WRITE32(16);
991 WRITEMEM("open id:", 8);
992 WRITE64(arg->id);
993 }
994
995 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
996 {
997 __be32 *p;
998
999 RESERVE_SPACE(4);
1000 switch(arg->open_flags & O_EXCL) {
1001 case 0:
1002 WRITE32(NFS4_CREATE_UNCHECKED);
1003 encode_attrs(xdr, arg->u.attrs, arg->server);
1004 break;
1005 default:
1006 WRITE32(NFS4_CREATE_EXCLUSIVE);
1007 encode_nfs4_verifier(xdr, &arg->u.verifier);
1008 }
1009 }
1010
1011 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1012 {
1013 __be32 *p;
1014
1015 RESERVE_SPACE(4);
1016 switch (arg->open_flags & O_CREAT) {
1017 case 0:
1018 WRITE32(NFS4_OPEN_NOCREATE);
1019 break;
1020 default:
1021 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1022 WRITE32(NFS4_OPEN_CREATE);
1023 encode_createmode(xdr, arg);
1024 }
1025 }
1026
1027 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
1028 {
1029 __be32 *p;
1030
1031 RESERVE_SPACE(4);
1032 switch (delegation_type) {
1033 case 0:
1034 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1035 break;
1036 case FMODE_READ:
1037 WRITE32(NFS4_OPEN_DELEGATE_READ);
1038 break;
1039 case FMODE_WRITE|FMODE_READ:
1040 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1041 break;
1042 default:
1043 BUG();
1044 }
1045 }
1046
1047 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1048 {
1049 __be32 *p;
1050
1051 RESERVE_SPACE(4);
1052 WRITE32(NFS4_OPEN_CLAIM_NULL);
1053 encode_string(xdr, name->len, name->name);
1054 }
1055
1056 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
1057 {
1058 __be32 *p;
1059
1060 RESERVE_SPACE(4);
1061 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1062 encode_delegation_type(xdr, type);
1063 }
1064
1065 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1066 {
1067 __be32 *p;
1068
1069 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1070 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1071 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1072 encode_string(xdr, name->len, name->name);
1073 }
1074
1075 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1076 {
1077 encode_openhdr(xdr, arg);
1078 encode_opentype(xdr, arg);
1079 switch (arg->claim) {
1080 case NFS4_OPEN_CLAIM_NULL:
1081 encode_claim_null(xdr, arg->name);
1082 break;
1083 case NFS4_OPEN_CLAIM_PREVIOUS:
1084 encode_claim_previous(xdr, arg->u.delegation_type);
1085 break;
1086 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1087 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1088 break;
1089 default:
1090 BUG();
1091 }
1092 return 0;
1093 }
1094
1095 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1096 {
1097 __be32 *p;
1098
1099 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1100 WRITE32(OP_OPEN_CONFIRM);
1101 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1102 WRITE32(arg->seqid->sequence->counter);
1103
1104 return 0;
1105 }
1106
1107 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1108 {
1109 __be32 *p;
1110
1111 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1112 WRITE32(OP_OPEN_DOWNGRADE);
1113 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1114 WRITE32(arg->seqid->sequence->counter);
1115 encode_share_access(xdr, arg->open_flags);
1116 return 0;
1117 }
1118
1119 static int
1120 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1121 {
1122 int len = fh->size;
1123 __be32 *p;
1124
1125 RESERVE_SPACE(8 + len);
1126 WRITE32(OP_PUTFH);
1127 WRITE32(len);
1128 WRITEMEM(fh->data, len);
1129
1130 return 0;
1131 }
1132
1133 static int encode_putrootfh(struct xdr_stream *xdr)
1134 {
1135 __be32 *p;
1136
1137 RESERVE_SPACE(4);
1138 WRITE32(OP_PUTROOTFH);
1139
1140 return 0;
1141 }
1142
1143 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1144 {
1145 nfs4_stateid stateid;
1146 __be32 *p;
1147
1148 RESERVE_SPACE(NFS4_STATEID_SIZE);
1149 if (ctx->state != NULL) {
1150 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1151 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1152 } else
1153 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1154 }
1155
1156 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1157 {
1158 __be32 *p;
1159
1160 RESERVE_SPACE(4);
1161 WRITE32(OP_READ);
1162
1163 encode_stateid(xdr, args->context);
1164
1165 RESERVE_SPACE(12);
1166 WRITE64(args->offset);
1167 WRITE32(args->count);
1168
1169 return 0;
1170 }
1171
1172 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1173 {
1174 uint32_t attrs[2] = {
1175 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1176 FATTR4_WORD1_MOUNTED_ON_FILEID,
1177 };
1178 __be32 *p;
1179
1180 RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1181 WRITE32(OP_READDIR);
1182 WRITE64(readdir->cookie);
1183 WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1184 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1185 WRITE32(readdir->count);
1186 WRITE32(2);
1187 /* Switch to mounted_on_fileid if the server supports it */
1188 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1189 attrs[0] &= ~FATTR4_WORD0_FILEID;
1190 else
1191 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1192 WRITE32(attrs[0] & readdir->bitmask[0]);
1193 WRITE32(attrs[1] & readdir->bitmask[1]);
1194 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1195 __func__,
1196 (unsigned long long)readdir->cookie,
1197 ((u32 *)readdir->verifier.data)[0],
1198 ((u32 *)readdir->verifier.data)[1],
1199 attrs[0] & readdir->bitmask[0],
1200 attrs[1] & readdir->bitmask[1]);
1201
1202 return 0;
1203 }
1204
1205 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1206 {
1207 __be32 *p;
1208
1209 RESERVE_SPACE(4);
1210 WRITE32(OP_READLINK);
1211
1212 return 0;
1213 }
1214
1215 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1216 {
1217 __be32 *p;
1218
1219 RESERVE_SPACE(8 + name->len);
1220 WRITE32(OP_REMOVE);
1221 WRITE32(name->len);
1222 WRITEMEM(name->name, name->len);
1223
1224 return 0;
1225 }
1226
1227 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1228 {
1229 __be32 *p;
1230
1231 RESERVE_SPACE(8 + oldname->len);
1232 WRITE32(OP_RENAME);
1233 WRITE32(oldname->len);
1234 WRITEMEM(oldname->name, oldname->len);
1235
1236 RESERVE_SPACE(4 + newname->len);
1237 WRITE32(newname->len);
1238 WRITEMEM(newname->name, newname->len);
1239
1240 return 0;
1241 }
1242
1243 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1244 {
1245 __be32 *p;
1246
1247 RESERVE_SPACE(12);
1248 WRITE32(OP_RENEW);
1249 WRITE64(client_stateid->cl_clientid);
1250
1251 return 0;
1252 }
1253
1254 static int
1255 encode_restorefh(struct xdr_stream *xdr)
1256 {
1257 __be32 *p;
1258
1259 RESERVE_SPACE(4);
1260 WRITE32(OP_RESTOREFH);
1261
1262 return 0;
1263 }
1264
1265 static int
1266 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1267 {
1268 __be32 *p;
1269
1270 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1271 WRITE32(OP_SETATTR);
1272 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1273 RESERVE_SPACE(2*4);
1274 WRITE32(1);
1275 WRITE32(FATTR4_WORD0_ACL);
1276 if (arg->acl_len % 4)
1277 return -EINVAL;
1278 RESERVE_SPACE(4);
1279 WRITE32(arg->acl_len);
1280 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1281 return 0;
1282 }
1283
1284 static int
1285 encode_savefh(struct xdr_stream *xdr)
1286 {
1287 __be32 *p;
1288
1289 RESERVE_SPACE(4);
1290 WRITE32(OP_SAVEFH);
1291
1292 return 0;
1293 }
1294
1295 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1296 {
1297 int status;
1298 __be32 *p;
1299
1300 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1301 WRITE32(OP_SETATTR);
1302 WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1303
1304 if ((status = encode_attrs(xdr, arg->iap, server)))
1305 return status;
1306
1307 return 0;
1308 }
1309
1310 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1311 {
1312 __be32 *p;
1313
1314 RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1315 WRITE32(OP_SETCLIENTID);
1316 WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1317
1318 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1319 RESERVE_SPACE(4);
1320 WRITE32(setclientid->sc_prog);
1321 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1322 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1323 RESERVE_SPACE(4);
1324 WRITE32(setclientid->sc_cb_ident);
1325
1326 return 0;
1327 }
1328
1329 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1330 {
1331 __be32 *p;
1332
1333 RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1334 WRITE32(OP_SETCLIENTID_CONFIRM);
1335 WRITE64(client_state->cl_clientid);
1336 WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1337
1338 return 0;
1339 }
1340
1341 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1342 {
1343 __be32 *p;
1344
1345 RESERVE_SPACE(4);
1346 WRITE32(OP_WRITE);
1347
1348 encode_stateid(xdr, args->context);
1349
1350 RESERVE_SPACE(16);
1351 WRITE64(args->offset);
1352 WRITE32(args->stable);
1353 WRITE32(args->count);
1354
1355 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1356
1357 return 0;
1358 }
1359
1360 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1361 {
1362 __be32 *p;
1363
1364 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1365
1366 WRITE32(OP_DELEGRETURN);
1367 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1368 return 0;
1369
1370 }
1371 /*
1372 * END OF "GENERIC" ENCODE ROUTINES.
1373 */
1374
1375 /*
1376 * Encode an ACCESS request
1377 */
1378 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1379 {
1380 struct xdr_stream xdr;
1381 struct compound_hdr hdr = {
1382 .nops = 3,
1383 };
1384 int status;
1385
1386 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1387 encode_compound_hdr(&xdr, &hdr);
1388 status = encode_putfh(&xdr, args->fh);
1389 if (status != 0)
1390 goto out;
1391 status = encode_access(&xdr, args->access);
1392 if (status != 0)
1393 goto out;
1394 status = encode_getfattr(&xdr, args->bitmask);
1395 out:
1396 return status;
1397 }
1398
1399 /*
1400 * Encode LOOKUP request
1401 */
1402 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1403 {
1404 struct xdr_stream xdr;
1405 struct compound_hdr hdr = {
1406 .nops = 4,
1407 };
1408 int status;
1409
1410 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1411 encode_compound_hdr(&xdr, &hdr);
1412 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1413 goto out;
1414 if ((status = encode_lookup(&xdr, args->name)) != 0)
1415 goto out;
1416 if ((status = encode_getfh(&xdr)) != 0)
1417 goto out;
1418 status = encode_getfattr(&xdr, args->bitmask);
1419 out:
1420 return status;
1421 }
1422
1423 /*
1424 * Encode LOOKUP_ROOT request
1425 */
1426 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1427 {
1428 struct xdr_stream xdr;
1429 struct compound_hdr hdr = {
1430 .nops = 3,
1431 };
1432 int status;
1433
1434 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435 encode_compound_hdr(&xdr, &hdr);
1436 if ((status = encode_putrootfh(&xdr)) != 0)
1437 goto out;
1438 if ((status = encode_getfh(&xdr)) == 0)
1439 status = encode_getfattr(&xdr, args->bitmask);
1440 out:
1441 return status;
1442 }
1443
1444 /*
1445 * Encode REMOVE request
1446 */
1447 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1448 {
1449 struct xdr_stream xdr;
1450 struct compound_hdr hdr = {
1451 .nops = 3,
1452 };
1453 int status;
1454
1455 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1456 encode_compound_hdr(&xdr, &hdr);
1457 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1458 goto out;
1459 if ((status = encode_remove(&xdr, &args->name)) != 0)
1460 goto out;
1461 status = encode_getfattr(&xdr, args->bitmask);
1462 out:
1463 return status;
1464 }
1465
1466 /*
1467 * Encode RENAME request
1468 */
1469 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1470 {
1471 struct xdr_stream xdr;
1472 struct compound_hdr hdr = {
1473 .nops = 7,
1474 };
1475 int status;
1476
1477 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1478 encode_compound_hdr(&xdr, &hdr);
1479 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1480 goto out;
1481 if ((status = encode_savefh(&xdr)) != 0)
1482 goto out;
1483 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1484 goto out;
1485 if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1486 goto out;
1487 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1488 goto out;
1489 if ((status = encode_restorefh(&xdr)) != 0)
1490 goto out;
1491 status = encode_getfattr(&xdr, args->bitmask);
1492 out:
1493 return status;
1494 }
1495
1496 /*
1497 * Encode LINK request
1498 */
1499 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1500 {
1501 struct xdr_stream xdr;
1502 struct compound_hdr hdr = {
1503 .nops = 7,
1504 };
1505 int status;
1506
1507 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1508 encode_compound_hdr(&xdr, &hdr);
1509 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1510 goto out;
1511 if ((status = encode_savefh(&xdr)) != 0)
1512 goto out;
1513 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1514 goto out;
1515 if ((status = encode_link(&xdr, args->name)) != 0)
1516 goto out;
1517 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1518 goto out;
1519 if ((status = encode_restorefh(&xdr)) != 0)
1520 goto out;
1521 status = encode_getfattr(&xdr, args->bitmask);
1522 out:
1523 return status;
1524 }
1525
1526 /*
1527 * Encode CREATE request
1528 */
1529 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1530 {
1531 struct xdr_stream xdr;
1532 struct compound_hdr hdr = {
1533 .nops = 7,
1534 };
1535 int status;
1536
1537 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1538 encode_compound_hdr(&xdr, &hdr);
1539 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1540 goto out;
1541 if ((status = encode_savefh(&xdr)) != 0)
1542 goto out;
1543 if ((status = encode_create(&xdr, args)) != 0)
1544 goto out;
1545 if ((status = encode_getfh(&xdr)) != 0)
1546 goto out;
1547 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1548 goto out;
1549 if ((status = encode_restorefh(&xdr)) != 0)
1550 goto out;
1551 status = encode_getfattr(&xdr, args->bitmask);
1552 out:
1553 return status;
1554 }
1555
1556 /*
1557 * Encode SYMLINK request
1558 */
1559 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1560 {
1561 return nfs4_xdr_enc_create(req, p, args);
1562 }
1563
1564 /*
1565 * Encode GETATTR request
1566 */
1567 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1568 {
1569 struct xdr_stream xdr;
1570 struct compound_hdr hdr = {
1571 .nops = 2,
1572 };
1573 int status;
1574
1575 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1576 encode_compound_hdr(&xdr, &hdr);
1577 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1578 status = encode_getfattr(&xdr, args->bitmask);
1579 return status;
1580 }
1581
1582 /*
1583 * Encode a CLOSE request
1584 */
1585 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1586 {
1587 struct xdr_stream xdr;
1588 struct compound_hdr hdr = {
1589 .nops = 3,
1590 };
1591 int status;
1592
1593 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1594 encode_compound_hdr(&xdr, &hdr);
1595 status = encode_putfh(&xdr, args->fh);
1596 if(status)
1597 goto out;
1598 status = encode_close(&xdr, args);
1599 if (status != 0)
1600 goto out;
1601 status = encode_getfattr(&xdr, args->bitmask);
1602 out:
1603 return status;
1604 }
1605
1606 /*
1607 * Encode an OPEN request
1608 */
1609 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1610 {
1611 struct xdr_stream xdr;
1612 struct compound_hdr hdr = {
1613 .nops = 7,
1614 };
1615 int status;
1616
1617 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1618 encode_compound_hdr(&xdr, &hdr);
1619 status = encode_putfh(&xdr, args->fh);
1620 if (status)
1621 goto out;
1622 status = encode_savefh(&xdr);
1623 if (status)
1624 goto out;
1625 status = encode_open(&xdr, args);
1626 if (status)
1627 goto out;
1628 status = encode_getfh(&xdr);
1629 if (status)
1630 goto out;
1631 status = encode_getfattr(&xdr, args->bitmask);
1632 if (status)
1633 goto out;
1634 status = encode_restorefh(&xdr);
1635 if (status)
1636 goto out;
1637 status = encode_getfattr(&xdr, args->bitmask);
1638 out:
1639 return status;
1640 }
1641
1642 /*
1643 * Encode an OPEN_CONFIRM request
1644 */
1645 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1646 {
1647 struct xdr_stream xdr;
1648 struct compound_hdr hdr = {
1649 .nops = 2,
1650 };
1651 int status;
1652
1653 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1654 encode_compound_hdr(&xdr, &hdr);
1655 status = encode_putfh(&xdr, args->fh);
1656 if(status)
1657 goto out;
1658 status = encode_open_confirm(&xdr, args);
1659 out:
1660 return status;
1661 }
1662
1663 /*
1664 * Encode an OPEN request with no attributes.
1665 */
1666 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1667 {
1668 struct xdr_stream xdr;
1669 struct compound_hdr hdr = {
1670 .nops = 3,
1671 };
1672 int status;
1673
1674 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1675 encode_compound_hdr(&xdr, &hdr);
1676 status = encode_putfh(&xdr, args->fh);
1677 if (status)
1678 goto out;
1679 status = encode_open(&xdr, args);
1680 if (status)
1681 goto out;
1682 status = encode_getfattr(&xdr, args->bitmask);
1683 out:
1684 return status;
1685 }
1686
1687 /*
1688 * Encode an OPEN_DOWNGRADE request
1689 */
1690 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1691 {
1692 struct xdr_stream xdr;
1693 struct compound_hdr hdr = {
1694 .nops = 3,
1695 };
1696 int status;
1697
1698 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1699 encode_compound_hdr(&xdr, &hdr);
1700 status = encode_putfh(&xdr, args->fh);
1701 if (status)
1702 goto out;
1703 status = encode_open_downgrade(&xdr, args);
1704 if (status != 0)
1705 goto out;
1706 status = encode_getfattr(&xdr, args->bitmask);
1707 out:
1708 return status;
1709 }
1710
1711 /*
1712 * Encode a LOCK request
1713 */
1714 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1715 {
1716 struct xdr_stream xdr;
1717 struct compound_hdr hdr = {
1718 .nops = 2,
1719 };
1720 int status;
1721
1722 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1723 encode_compound_hdr(&xdr, &hdr);
1724 status = encode_putfh(&xdr, args->fh);
1725 if(status)
1726 goto out;
1727 status = encode_lock(&xdr, args);
1728 out:
1729 return status;
1730 }
1731
1732 /*
1733 * Encode a LOCKT request
1734 */
1735 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1736 {
1737 struct xdr_stream xdr;
1738 struct compound_hdr hdr = {
1739 .nops = 2,
1740 };
1741 int status;
1742
1743 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744 encode_compound_hdr(&xdr, &hdr);
1745 status = encode_putfh(&xdr, args->fh);
1746 if(status)
1747 goto out;
1748 status = encode_lockt(&xdr, args);
1749 out:
1750 return status;
1751 }
1752
1753 /*
1754 * Encode a LOCKU request
1755 */
1756 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1757 {
1758 struct xdr_stream xdr;
1759 struct compound_hdr hdr = {
1760 .nops = 2,
1761 };
1762 int status;
1763
1764 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1765 encode_compound_hdr(&xdr, &hdr);
1766 status = encode_putfh(&xdr, args->fh);
1767 if(status)
1768 goto out;
1769 status = encode_locku(&xdr, args);
1770 out:
1771 return status;
1772 }
1773
1774 /*
1775 * Encode a READLINK request
1776 */
1777 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1778 {
1779 struct xdr_stream xdr;
1780 struct compound_hdr hdr = {
1781 .nops = 2,
1782 };
1783 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1784 unsigned int replen;
1785 int status;
1786
1787 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1788 encode_compound_hdr(&xdr, &hdr);
1789 status = encode_putfh(&xdr, args->fh);
1790 if(status)
1791 goto out;
1792 status = encode_readlink(&xdr, args, req);
1793
1794 /* set up reply kvec
1795 * toplevel_status + taglen + rescount + OP_PUTFH + status
1796 * + OP_READLINK + status + string length = 8
1797 */
1798 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1799 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1800 args->pgbase, args->pglen);
1801
1802 out:
1803 return status;
1804 }
1805
1806 /*
1807 * Encode a READDIR request
1808 */
1809 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1810 {
1811 struct xdr_stream xdr;
1812 struct compound_hdr hdr = {
1813 .nops = 2,
1814 };
1815 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1816 int replen;
1817 int status;
1818
1819 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1820 encode_compound_hdr(&xdr, &hdr);
1821 status = encode_putfh(&xdr, args->fh);
1822 if(status)
1823 goto out;
1824 status = encode_readdir(&xdr, args, req);
1825
1826 /* set up reply kvec
1827 * toplevel_status + taglen + rescount + OP_PUTFH + status
1828 * + OP_READDIR + status + verifer(2) = 9
1829 */
1830 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1831 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1832 args->pgbase, args->count);
1833 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1834 __func__, replen, args->pages,
1835 args->pgbase, args->count);
1836
1837 out:
1838 return status;
1839 }
1840
1841 /*
1842 * Encode a READ request
1843 */
1844 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1845 {
1846 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1847 struct xdr_stream xdr;
1848 struct compound_hdr hdr = {
1849 .nops = 2,
1850 };
1851 int replen, status;
1852
1853 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1854 encode_compound_hdr(&xdr, &hdr);
1855 status = encode_putfh(&xdr, args->fh);
1856 if (status)
1857 goto out;
1858 status = encode_read(&xdr, args);
1859 if (status)
1860 goto out;
1861
1862 /* set up reply kvec
1863 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1864 * + OP_READ + status + eof + datalen = 9
1865 */
1866 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1867 xdr_inline_pages(&req->rq_rcv_buf, replen,
1868 args->pages, args->pgbase, args->count);
1869 req->rq_rcv_buf.flags |= XDRBUF_READ;
1870 out:
1871 return status;
1872 }
1873
1874 /*
1875 * Encode an SETATTR request
1876 */
1877 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1878
1879 {
1880 struct xdr_stream xdr;
1881 struct compound_hdr hdr = {
1882 .nops = 3,
1883 };
1884 int status;
1885
1886 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1887 encode_compound_hdr(&xdr, &hdr);
1888 status = encode_putfh(&xdr, args->fh);
1889 if(status)
1890 goto out;
1891 status = encode_setattr(&xdr, args, args->server);
1892 if(status)
1893 goto out;
1894 status = encode_getfattr(&xdr, args->bitmask);
1895 out:
1896 return status;
1897 }
1898
1899 /*
1900 * Encode a GETACL request
1901 */
1902 static int
1903 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1904 struct nfs_getaclargs *args)
1905 {
1906 struct xdr_stream xdr;
1907 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1908 struct compound_hdr hdr = {
1909 .nops = 2,
1910 };
1911 int replen, status;
1912
1913 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914 encode_compound_hdr(&xdr, &hdr);
1915 status = encode_putfh(&xdr, args->fh);
1916 if (status)
1917 goto out;
1918 status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1919 /* set up reply buffer: */
1920 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1921 xdr_inline_pages(&req->rq_rcv_buf, replen,
1922 args->acl_pages, args->acl_pgbase, args->acl_len);
1923 out:
1924 return status;
1925 }
1926
1927 /*
1928 * Encode a WRITE request
1929 */
1930 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1931 {
1932 struct xdr_stream xdr;
1933 struct compound_hdr hdr = {
1934 .nops = 3,
1935 };
1936 int status;
1937
1938 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1939 encode_compound_hdr(&xdr, &hdr);
1940 status = encode_putfh(&xdr, args->fh);
1941 if (status)
1942 goto out;
1943 status = encode_write(&xdr, args);
1944 if (status)
1945 goto out;
1946 req->rq_snd_buf.flags |= XDRBUF_WRITE;
1947 status = encode_getfattr(&xdr, args->bitmask);
1948 out:
1949 return status;
1950 }
1951
1952 /*
1953 * a COMMIT request
1954 */
1955 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1956 {
1957 struct xdr_stream xdr;
1958 struct compound_hdr hdr = {
1959 .nops = 3,
1960 };
1961 int status;
1962
1963 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964 encode_compound_hdr(&xdr, &hdr);
1965 status = encode_putfh(&xdr, args->fh);
1966 if (status)
1967 goto out;
1968 status = encode_commit(&xdr, args);
1969 if (status)
1970 goto out;
1971 status = encode_getfattr(&xdr, args->bitmask);
1972 out:
1973 return status;
1974 }
1975
1976 /*
1977 * FSINFO request
1978 */
1979 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1980 {
1981 struct xdr_stream xdr;
1982 struct compound_hdr hdr = {
1983 .nops = 2,
1984 };
1985 int status;
1986
1987 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988 encode_compound_hdr(&xdr, &hdr);
1989 status = encode_putfh(&xdr, args->fh);
1990 if (!status)
1991 status = encode_fsinfo(&xdr, args->bitmask);
1992 return status;
1993 }
1994
1995 /*
1996 * a PATHCONF request
1997 */
1998 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1999 {
2000 struct xdr_stream xdr;
2001 struct compound_hdr hdr = {
2002 .nops = 2,
2003 };
2004 int status;
2005
2006 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007 encode_compound_hdr(&xdr, &hdr);
2008 status = encode_putfh(&xdr, args->fh);
2009 if (!status)
2010 status = encode_getattr_one(&xdr,
2011 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2012 return status;
2013 }
2014
2015 /*
2016 * a STATFS request
2017 */
2018 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2019 {
2020 struct xdr_stream xdr;
2021 struct compound_hdr hdr = {
2022 .nops = 2,
2023 };
2024 int status;
2025
2026 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2027 encode_compound_hdr(&xdr, &hdr);
2028 status = encode_putfh(&xdr, args->fh);
2029 if (status == 0)
2030 status = encode_getattr_two(&xdr,
2031 args->bitmask[0] & nfs4_statfs_bitmap[0],
2032 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2033 return status;
2034 }
2035
2036 /*
2037 * GETATTR_BITMAP request
2038 */
2039 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2040 {
2041 struct xdr_stream xdr;
2042 struct compound_hdr hdr = {
2043 .nops = 2,
2044 };
2045 int status;
2046
2047 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2048 encode_compound_hdr(&xdr, &hdr);
2049 status = encode_putfh(&xdr, fhandle);
2050 if (status == 0)
2051 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2052 FATTR4_WORD0_LINK_SUPPORT|
2053 FATTR4_WORD0_SYMLINK_SUPPORT|
2054 FATTR4_WORD0_ACLSUPPORT);
2055 return status;
2056 }
2057
2058 /*
2059 * a RENEW request
2060 */
2061 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2062 {
2063 struct xdr_stream xdr;
2064 struct compound_hdr hdr = {
2065 .nops = 1,
2066 };
2067
2068 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2069 encode_compound_hdr(&xdr, &hdr);
2070 return encode_renew(&xdr, clp);
2071 }
2072
2073 /*
2074 * a SETCLIENTID request
2075 */
2076 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2077 {
2078 struct xdr_stream xdr;
2079 struct compound_hdr hdr = {
2080 .nops = 1,
2081 };
2082
2083 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084 encode_compound_hdr(&xdr, &hdr);
2085 return encode_setclientid(&xdr, sc);
2086 }
2087
2088 /*
2089 * a SETCLIENTID_CONFIRM request
2090 */
2091 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2092 {
2093 struct xdr_stream xdr;
2094 struct compound_hdr hdr = {
2095 .nops = 3,
2096 };
2097 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2098 int status;
2099
2100 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2101 encode_compound_hdr(&xdr, &hdr);
2102 status = encode_setclientid_confirm(&xdr, clp);
2103 if (!status)
2104 status = encode_putrootfh(&xdr);
2105 if (!status)
2106 status = encode_fsinfo(&xdr, lease_bitmap);
2107 return status;
2108 }
2109
2110 /*
2111 * DELEGRETURN request
2112 */
2113 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2114 {
2115 struct xdr_stream xdr;
2116 struct compound_hdr hdr = {
2117 .nops = 3,
2118 };
2119 int status;
2120
2121 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2122 encode_compound_hdr(&xdr, &hdr);
2123 status = encode_putfh(&xdr, args->fhandle);
2124 if (status != 0)
2125 goto out;
2126 status = encode_delegreturn(&xdr, args->stateid);
2127 if (status != 0)
2128 goto out;
2129 status = encode_getfattr(&xdr, args->bitmask);
2130 out:
2131 return status;
2132 }
2133
2134 /*
2135 * Encode FS_LOCATIONS request
2136 */
2137 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2138 {
2139 struct xdr_stream xdr;
2140 struct compound_hdr hdr = {
2141 .nops = 3,
2142 };
2143 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2144 int replen;
2145 int status;
2146
2147 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2148 encode_compound_hdr(&xdr, &hdr);
2149 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2150 goto out;
2151 if ((status = encode_lookup(&xdr, args->name)) != 0)
2152 goto out;
2153 if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2154 goto out;
2155 /* set up reply
2156 * toplevel_status + OP_PUTFH + status
2157 * + OP_LOOKUP + status + OP_GETATTR + status = 7
2158 */
2159 replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2160 xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2161 0, PAGE_SIZE);
2162 out:
2163 return status;
2164 }
2165
2166 /*
2167 * START OF "GENERIC" DECODE ROUTINES.
2168 * These may look a little ugly since they are imported from a "generic"
2169 * set of XDR encode/decode routines which are intended to be shared by
2170 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2171 *
2172 * If the pain of reading these is too great, it should be a straightforward
2173 * task to translate them into Linux-specific versions which are more
2174 * consistent with the style used in NFSv2/v3...
2175 */
2176 #define READ32(x) (x) = ntohl(*p++)
2177 #define READ64(x) do { \
2178 (x) = (u64)ntohl(*p++) << 32; \
2179 (x) |= ntohl(*p++); \
2180 } while (0)
2181 #define READTIME(x) do { \
2182 p++; \
2183 (x.tv_sec) = ntohl(*p++); \
2184 (x.tv_nsec) = ntohl(*p++); \
2185 } while (0)
2186 #define COPYMEM(x,nbytes) do { \
2187 memcpy((x), p, nbytes); \
2188 p += XDR_QUADLEN(nbytes); \
2189 } while (0)
2190
2191 #define READ_BUF(nbytes) do { \
2192 p = xdr_inline_decode(xdr, nbytes); \
2193 if (unlikely(!p)) { \
2194 dprintk("nfs: %s: prematurely hit end of receive" \
2195 " buffer\n", __func__); \
2196 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2197 __func__, xdr->p, nbytes, xdr->end); \
2198 return -EIO; \
2199 } \
2200 } while (0)
2201
2202 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2203 {
2204 __be32 *p;
2205
2206 READ_BUF(4);
2207 READ32(*len);
2208 READ_BUF(*len);
2209 *string = (char *)p;
2210 return 0;
2211 }
2212
2213 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2214 {
2215 __be32 *p;
2216
2217 READ_BUF(8);
2218 READ32(hdr->status);
2219 READ32(hdr->taglen);
2220
2221 READ_BUF(hdr->taglen + 4);
2222 hdr->tag = (char *)p;
2223 p += XDR_QUADLEN(hdr->taglen);
2224 READ32(hdr->nops);
2225 return 0;
2226 }
2227
2228 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2229 {
2230 __be32 *p;
2231 uint32_t opnum;
2232 int32_t nfserr;
2233
2234 READ_BUF(8);
2235 READ32(opnum);
2236 if (opnum != expected) {
2237 dprintk("nfs: Server returned operation"
2238 " %d but we issued a request for %d\n",
2239 opnum, expected);
2240 return -EIO;
2241 }
2242 READ32(nfserr);
2243 if (nfserr != NFS_OK)
2244 return nfs4_stat_to_errno(nfserr);
2245 return 0;
2246 }
2247
2248 /* Dummy routine */
2249 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2250 {
2251 __be32 *p;
2252 unsigned int strlen;
2253 char *str;
2254
2255 READ_BUF(12);
2256 return decode_opaque_inline(xdr, &strlen, &str);
2257 }
2258
2259 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2260 {
2261 uint32_t bmlen;
2262 __be32 *p;
2263
2264 READ_BUF(4);
2265 READ32(bmlen);
2266
2267 bitmap[0] = bitmap[1] = 0;
2268 READ_BUF((bmlen << 2));
2269 if (bmlen > 0) {
2270 READ32(bitmap[0]);
2271 if (bmlen > 1)
2272 READ32(bitmap[1]);
2273 }
2274 return 0;
2275 }
2276
2277 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2278 {
2279 __be32 *p;
2280
2281 READ_BUF(4);
2282 READ32(*attrlen);
2283 *savep = xdr->p;
2284 return 0;
2285 }
2286
2287 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2288 {
2289 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2290 decode_attr_bitmap(xdr, bitmask);
2291 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2292 } else
2293 bitmask[0] = bitmask[1] = 0;
2294 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2295 return 0;
2296 }
2297
2298 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2299 {
2300 __be32 *p;
2301
2302 *type = 0;
2303 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2304 return -EIO;
2305 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2306 READ_BUF(4);
2307 READ32(*type);
2308 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2309 dprintk("%s: bad type %d\n", __func__, *type);
2310 return -EIO;
2311 }
2312 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2313 }
2314 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type].nfs2type);
2315 return 0;
2316 }
2317
2318 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2319 {
2320 __be32 *p;
2321
2322 *change = 0;
2323 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2324 return -EIO;
2325 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2326 READ_BUF(8);
2327 READ64(*change);
2328 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2329 }
2330 dprintk("%s: change attribute=%Lu\n", __func__,
2331 (unsigned long long)*change);
2332 return 0;
2333 }
2334
2335 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2336 {
2337 __be32 *p;
2338
2339 *size = 0;
2340 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2341 return -EIO;
2342 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2343 READ_BUF(8);
2344 READ64(*size);
2345 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2346 }
2347 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2348 return 0;
2349 }
2350
2351 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2352 {
2353 __be32 *p;
2354
2355 *res = 0;
2356 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2357 return -EIO;
2358 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2359 READ_BUF(4);
2360 READ32(*res);
2361 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2362 }
2363 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2364 return 0;
2365 }
2366
2367 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2368 {
2369 __be32 *p;
2370
2371 *res = 0;
2372 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2373 return -EIO;
2374 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2375 READ_BUF(4);
2376 READ32(*res);
2377 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2378 }
2379 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2380 return 0;
2381 }
2382
2383 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2384 {
2385 __be32 *p;
2386
2387 fsid->major = 0;
2388 fsid->minor = 0;
2389 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2390 return -EIO;
2391 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2392 READ_BUF(16);
2393 READ64(fsid->major);
2394 READ64(fsid->minor);
2395 bitmap[0] &= ~FATTR4_WORD0_FSID;
2396 }
2397 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2398 (unsigned long long)fsid->major,
2399 (unsigned long long)fsid->minor);
2400 return 0;
2401 }
2402
2403 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2404 {
2405 __be32 *p;
2406
2407 *res = 60;
2408 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2409 return -EIO;
2410 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2411 READ_BUF(4);
2412 READ32(*res);
2413 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2414 }
2415 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2416 return 0;
2417 }
2418
2419 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2420 {
2421 __be32 *p;
2422
2423 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2424 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2425 return -EIO;
2426 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2427 READ_BUF(4);
2428 READ32(*res);
2429 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2430 }
2431 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2432 return 0;
2433 }
2434
2435 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2436 {
2437 __be32 *p;
2438
2439 *fileid = 0;
2440 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2441 return -EIO;
2442 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2443 READ_BUF(8);
2444 READ64(*fileid);
2445 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2446 }
2447 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2448 return 0;
2449 }
2450
2451 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2452 {
2453 __be32 *p;
2454
2455 *fileid = 0;
2456 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2457 return -EIO;
2458 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2459 READ_BUF(8);
2460 READ64(*fileid);
2461 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2462 }
2463 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2464 return 0;
2465 }
2466
2467 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2468 {
2469 __be32 *p;
2470 int status = 0;
2471
2472 *res = 0;
2473 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2474 return -EIO;
2475 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2476 READ_BUF(8);
2477 READ64(*res);
2478 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2479 }
2480 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2481 return status;
2482 }
2483
2484 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2485 {
2486 __be32 *p;
2487 int status = 0;
2488
2489 *res = 0;
2490 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2491 return -EIO;
2492 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2493 READ_BUF(8);
2494 READ64(*res);
2495 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2496 }
2497 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2498 return status;
2499 }
2500
2501 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2502 {
2503 __be32 *p;
2504 int status = 0;
2505
2506 *res = 0;
2507 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2508 return -EIO;
2509 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2510 READ_BUF(8);
2511 READ64(*res);
2512 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2513 }
2514 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2515 return status;
2516 }
2517
2518 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2519 {
2520 u32 n;
2521 __be32 *p;
2522 int status = 0;
2523
2524 READ_BUF(4);
2525 READ32(n);
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 ", __func__);
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 u32 m;
2583 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2584
2585 READ_BUF(4);
2586 READ32(m);
2587
2588 loc->nservers = 0;
2589 dprintk("%s: servers ", __func__);
2590 while (loc->nservers < m) {
2591 struct nfs4_string *server = &loc->servers[loc->nservers];
2592 status = decode_opaque_inline(xdr, &server->len, &server->data);
2593 if (unlikely(status != 0))
2594 goto out_eio;
2595 dprintk("%s ", server->data);
2596 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2597 loc->nservers++;
2598 else {
2599 unsigned int i;
2600 dprintk("%s: using first %u of %u servers "
2601 "returned for location %u\n",
2602 __func__,
2603 NFS4_FS_LOCATION_MAXSERVERS,
2604 m, res->nlocations);
2605 for (i = loc->nservers; i < m; i++) {
2606 unsigned int len;
2607 char *data;
2608 status = decode_opaque_inline(xdr, &len, &data);
2609 if (unlikely(status != 0))
2610 goto out_eio;
2611 }
2612 }
2613 }
2614 status = decode_pathname(xdr, &loc->rootpath);
2615 if (unlikely(status != 0))
2616 goto out_eio;
2617 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2618 res->nlocations++;
2619 }
2620 out:
2621 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2622 return status;
2623 out_eio:
2624 status = -EIO;
2625 goto out;
2626 }
2627
2628 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2629 {
2630 __be32 *p;
2631 int status = 0;
2632
2633 *res = 0;
2634 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2635 return -EIO;
2636 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2637 READ_BUF(8);
2638 READ64(*res);
2639 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2640 }
2641 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2642 return status;
2643 }
2644
2645 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2646 {
2647 __be32 *p;
2648 int status = 0;
2649
2650 *maxlink = 1;
2651 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2652 return -EIO;
2653 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2654 READ_BUF(4);
2655 READ32(*maxlink);
2656 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2657 }
2658 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2659 return status;
2660 }
2661
2662 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2663 {
2664 __be32 *p;
2665 int status = 0;
2666
2667 *maxname = 1024;
2668 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2669 return -EIO;
2670 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2671 READ_BUF(4);
2672 READ32(*maxname);
2673 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2674 }
2675 dprintk("%s: maxname=%u\n", __func__, *maxname);
2676 return status;
2677 }
2678
2679 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2680 {
2681 __be32 *p;
2682 int status = 0;
2683
2684 *res = 1024;
2685 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2686 return -EIO;
2687 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2688 uint64_t maxread;
2689 READ_BUF(8);
2690 READ64(maxread);
2691 if (maxread > 0x7FFFFFFF)
2692 maxread = 0x7FFFFFFF;
2693 *res = (uint32_t)maxread;
2694 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2695 }
2696 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2697 return status;
2698 }
2699
2700 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2701 {
2702 __be32 *p;
2703 int status = 0;
2704
2705 *res = 1024;
2706 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2707 return -EIO;
2708 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2709 uint64_t maxwrite;
2710 READ_BUF(8);
2711 READ64(maxwrite);
2712 if (maxwrite > 0x7FFFFFFF)
2713 maxwrite = 0x7FFFFFFF;
2714 *res = (uint32_t)maxwrite;
2715 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2716 }
2717 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2718 return status;
2719 }
2720
2721 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2722 {
2723 __be32 *p;
2724
2725 *mode = 0;
2726 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2727 return -EIO;
2728 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2729 READ_BUF(4);
2730 READ32(*mode);
2731 *mode &= ~S_IFMT;
2732 bitmap[1] &= ~FATTR4_WORD1_MODE;
2733 }
2734 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2735 return 0;
2736 }
2737
2738 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2739 {
2740 __be32 *p;
2741
2742 *nlink = 1;
2743 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2744 return -EIO;
2745 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2746 READ_BUF(4);
2747 READ32(*nlink);
2748 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2749 }
2750 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2751 return 0;
2752 }
2753
2754 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2755 {
2756 uint32_t len;
2757 __be32 *p;
2758
2759 *uid = -2;
2760 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2761 return -EIO;
2762 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2763 READ_BUF(4);
2764 READ32(len);
2765 READ_BUF(len);
2766 if (len < XDR_MAX_NETOBJ) {
2767 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2768 dprintk("%s: nfs_map_name_to_uid failed!\n",
2769 __func__);
2770 } else
2771 dprintk("%s: name too long (%u)!\n",
2772 __func__, len);
2773 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2774 }
2775 dprintk("%s: uid=%d\n", __func__, (int)*uid);
2776 return 0;
2777 }
2778
2779 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2780 {
2781 uint32_t len;
2782 __be32 *p;
2783
2784 *gid = -2;
2785 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2786 return -EIO;
2787 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2788 READ_BUF(4);
2789 READ32(len);
2790 READ_BUF(len);
2791 if (len < XDR_MAX_NETOBJ) {
2792 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2793 dprintk("%s: nfs_map_group_to_gid failed!\n",
2794 __func__);
2795 } else
2796 dprintk("%s: name too long (%u)!\n",
2797 __func__, len);
2798 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2799 }
2800 dprintk("%s: gid=%d\n", __func__, (int)*gid);
2801 return 0;
2802 }
2803
2804 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2805 {
2806 uint32_t major = 0, minor = 0;
2807 __be32 *p;
2808
2809 *rdev = MKDEV(0,0);
2810 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2811 return -EIO;
2812 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2813 dev_t tmp;
2814
2815 READ_BUF(8);
2816 READ32(major);
2817 READ32(minor);
2818 tmp = MKDEV(major, minor);
2819 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2820 *rdev = tmp;
2821 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2822 }
2823 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2824 return 0;
2825 }
2826
2827 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2828 {
2829 __be32 *p;
2830 int status = 0;
2831
2832 *res = 0;
2833 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2834 return -EIO;
2835 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2836 READ_BUF(8);
2837 READ64(*res);
2838 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2839 }
2840 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2841 return status;
2842 }
2843
2844 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2845 {
2846 __be32 *p;
2847 int status = 0;
2848
2849 *res = 0;
2850 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2851 return -EIO;
2852 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2853 READ_BUF(8);
2854 READ64(*res);
2855 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2856 }
2857 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2858 return status;
2859 }
2860
2861 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2862 {
2863 __be32 *p;
2864 int status = 0;
2865
2866 *res = 0;
2867 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2868 return -EIO;
2869 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2870 READ_BUF(8);
2871 READ64(*res);
2872 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2873 }
2874 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2875 return status;
2876 }
2877
2878 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2879 {
2880 __be32 *p;
2881
2882 *used = 0;
2883 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2884 return -EIO;
2885 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2886 READ_BUF(8);
2887 READ64(*used);
2888 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2889 }
2890 dprintk("%s: space used=%Lu\n", __func__,
2891 (unsigned long long)*used);
2892 return 0;
2893 }
2894
2895 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2896 {
2897 __be32 *p;
2898 uint64_t sec;
2899 uint32_t nsec;
2900
2901 READ_BUF(12);
2902 READ64(sec);
2903 READ32(nsec);
2904 time->tv_sec = (time_t)sec;
2905 time->tv_nsec = (long)nsec;
2906 return 0;
2907 }
2908
2909 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2910 {
2911 int status = 0;
2912
2913 time->tv_sec = 0;
2914 time->tv_nsec = 0;
2915 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2916 return -EIO;
2917 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2918 status = decode_attr_time(xdr, time);
2919 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2920 }
2921 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2922 return status;
2923 }
2924
2925 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2926 {
2927 int status = 0;
2928
2929 time->tv_sec = 0;
2930 time->tv_nsec = 0;
2931 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2932 return -EIO;
2933 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2934 status = decode_attr_time(xdr, time);
2935 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2936 }
2937 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2938 return status;
2939 }
2940
2941 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2942 {
2943 int status = 0;
2944
2945 time->tv_sec = 0;
2946 time->tv_nsec = 0;
2947 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2948 return -EIO;
2949 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2950 status = decode_attr_time(xdr, time);
2951 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2952 }
2953 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2954 return status;
2955 }
2956
2957 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2958 {
2959 unsigned int attrwords = XDR_QUADLEN(attrlen);
2960 unsigned int nwords = xdr->p - savep;
2961
2962 if (unlikely(attrwords != nwords)) {
2963 dprintk("%s: server returned incorrect attribute length: "
2964 "%u %c %u\n",
2965 __func__,
2966 attrwords << 2,
2967 (attrwords < nwords) ? '<' : '>',
2968 nwords << 2);
2969 return -EIO;
2970 }
2971 return 0;
2972 }
2973
2974 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2975 {
2976 __be32 *p;
2977
2978 READ_BUF(20);
2979 READ32(cinfo->atomic);
2980 READ64(cinfo->before);
2981 READ64(cinfo->after);
2982 return 0;
2983 }
2984
2985 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2986 {
2987 __be32 *p;
2988 uint32_t supp, acc;
2989 int status;
2990
2991 status = decode_op_hdr(xdr, OP_ACCESS);
2992 if (status)
2993 return status;
2994 READ_BUF(8);
2995 READ32(supp);
2996 READ32(acc);
2997 access->supported = supp;
2998 access->access = acc;
2999 return 0;
3000 }
3001
3002 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3003 {
3004 __be32 *p;
3005 int status;
3006
3007 status = decode_op_hdr(xdr, OP_CLOSE);
3008 if (status != -EIO)
3009 nfs_increment_open_seqid(status, res->seqid);
3010 if (status)
3011 return status;
3012 READ_BUF(NFS4_STATEID_SIZE);
3013 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3014 return 0;
3015 }
3016
3017 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3018 {
3019 __be32 *p;
3020 int status;
3021
3022 status = decode_op_hdr(xdr, OP_COMMIT);
3023 if (status)
3024 return status;
3025 READ_BUF(8);
3026 COPYMEM(res->verf->verifier, 8);
3027 return 0;
3028 }
3029
3030 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3031 {
3032 __be32 *p;
3033 uint32_t bmlen;
3034 int status;
3035
3036 status = decode_op_hdr(xdr, OP_CREATE);
3037 if (status)
3038 return status;
3039 if ((status = decode_change_info(xdr, cinfo)))
3040 return status;
3041 READ_BUF(4);
3042 READ32(bmlen);
3043 READ_BUF(bmlen << 2);
3044 return 0;
3045 }
3046
3047 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3048 {
3049 __be32 *savep;
3050 uint32_t attrlen,
3051 bitmap[2] = {0};
3052 int status;
3053
3054 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3055 goto xdr_error;
3056 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3057 goto xdr_error;
3058 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3059 goto xdr_error;
3060 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3061 goto xdr_error;
3062 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3063 goto xdr_error;
3064 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3065 goto xdr_error;
3066 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3067 goto xdr_error;
3068 status = verify_attr_len(xdr, savep, attrlen);
3069 xdr_error:
3070 dprintk("%s: xdr returned %d!\n", __func__, -status);
3071 return status;
3072 }
3073
3074 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3075 {
3076 __be32 *savep;
3077 uint32_t attrlen,
3078 bitmap[2] = {0};
3079 int status;
3080
3081 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3082 goto xdr_error;
3083 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3084 goto xdr_error;
3085 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3086 goto xdr_error;
3087
3088 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3089 goto xdr_error;
3090 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3091 goto xdr_error;
3092 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3093 goto xdr_error;
3094 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3095 goto xdr_error;
3096 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3097 goto xdr_error;
3098 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3099 goto xdr_error;
3100
3101 status = verify_attr_len(xdr, savep, attrlen);
3102 xdr_error:
3103 dprintk("%s: xdr returned %d!\n", __func__, -status);
3104 return status;
3105 }
3106
3107 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3108 {
3109 __be32 *savep;
3110 uint32_t attrlen,
3111 bitmap[2] = {0};
3112 int status;
3113
3114 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3115 goto xdr_error;
3116 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3117 goto xdr_error;
3118 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3119 goto xdr_error;
3120
3121 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3122 goto xdr_error;
3123 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3124 goto xdr_error;
3125
3126 status = verify_attr_len(xdr, savep, attrlen);
3127 xdr_error:
3128 dprintk("%s: xdr returned %d!\n", __func__, -status);
3129 return status;
3130 }
3131
3132 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3133 {
3134 __be32 *savep;
3135 uint32_t attrlen,
3136 bitmap[2] = {0},
3137 type;
3138 int status, fmode = 0;
3139 uint64_t fileid;
3140
3141 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3142 goto xdr_error;
3143 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3144 goto xdr_error;
3145
3146 fattr->bitmap[0] = bitmap[0];
3147 fattr->bitmap[1] = bitmap[1];
3148
3149 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3150 goto xdr_error;
3151
3152
3153 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3154 goto xdr_error;
3155 fattr->type = nfs_type2fmt[type].nfs2type;
3156 fmode = nfs_type2fmt[type].mode;
3157
3158 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3159 goto xdr_error;
3160 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3161 goto xdr_error;
3162 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3163 goto xdr_error;
3164 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3165 goto xdr_error;
3166 if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3167 struct nfs4_fs_locations,
3168 fattr))) != 0)
3169 goto xdr_error;
3170 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3171 goto xdr_error;
3172 fattr->mode |= fmode;
3173 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3174 goto xdr_error;
3175 if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3176 goto xdr_error;
3177 if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3178 goto xdr_error;
3179 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3180 goto xdr_error;
3181 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3182 goto xdr_error;
3183 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3184 goto xdr_error;
3185 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3186 goto xdr_error;
3187 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3188 goto xdr_error;
3189 if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3190 goto xdr_error;
3191 if (fattr->fileid == 0 && fileid != 0)
3192 fattr->fileid = fileid;
3193 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3194 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3195 xdr_error:
3196 dprintk("%s: xdr returned %d\n", __func__, -status);
3197 return status;
3198 }
3199
3200
3201 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3202 {
3203 __be32 *savep;
3204 uint32_t attrlen, bitmap[2];
3205 int status;
3206
3207 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3208 goto xdr_error;
3209 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3210 goto xdr_error;
3211 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3212 goto xdr_error;
3213
3214 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3215
3216 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3217 goto xdr_error;
3218 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3219 goto xdr_error;
3220 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3221 goto xdr_error;
3222 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3223 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3224 goto xdr_error;
3225 fsinfo->wtpref = fsinfo->wtmax;
3226
3227 status = verify_attr_len(xdr, savep, attrlen);
3228 xdr_error:
3229 dprintk("%s: xdr returned %d!\n", __func__, -status);
3230 return status;
3231 }
3232
3233 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3234 {
3235 __be32 *p;
3236 uint32_t len;
3237 int status;
3238
3239 /* Zero handle first to allow comparisons */
3240 memset(fh, 0, sizeof(*fh));
3241
3242 status = decode_op_hdr(xdr, OP_GETFH);
3243 if (status)
3244 return status;
3245
3246 READ_BUF(4);
3247 READ32(len);
3248 if (len > NFS4_FHSIZE)
3249 return -EIO;
3250 fh->size = len;
3251 READ_BUF(len);
3252 COPYMEM(fh->data, len);
3253 return 0;
3254 }
3255
3256 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3257 {
3258 int status;
3259
3260 status = decode_op_hdr(xdr, OP_LINK);
3261 if (status)
3262 return status;
3263 return decode_change_info(xdr, cinfo);
3264 }
3265
3266 /*
3267 * We create the owner, so we know a proper owner.id length is 4.
3268 */
3269 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3270 {
3271 uint64_t offset, length, clientid;
3272 __be32 *p;
3273 uint32_t namelen, type;
3274
3275 READ_BUF(32);
3276 READ64(offset);
3277 READ64(length);
3278 READ32(type);
3279 if (fl != NULL) {
3280 fl->fl_start = (loff_t)offset;
3281 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3282 if (length == ~(uint64_t)0)
3283 fl->fl_end = OFFSET_MAX;
3284 fl->fl_type = F_WRLCK;
3285 if (type & 1)
3286 fl->fl_type = F_RDLCK;
3287 fl->fl_pid = 0;
3288 }
3289 READ64(clientid);
3290 READ32(namelen);
3291 READ_BUF(namelen);
3292 return -NFS4ERR_DENIED;
3293 }
3294
3295 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3296 {
3297 __be32 *p;
3298 int status;
3299
3300 status = decode_op_hdr(xdr, OP_LOCK);
3301 if (status == -EIO)
3302 goto out;
3303 if (status == 0) {
3304 READ_BUF(NFS4_STATEID_SIZE);
3305 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3306 } else if (status == -NFS4ERR_DENIED)
3307 status = decode_lock_denied(xdr, NULL);
3308 if (res->open_seqid != NULL)
3309 nfs_increment_open_seqid(status, res->open_seqid);
3310 nfs_increment_lock_seqid(status, res->lock_seqid);
3311 out:
3312 return status;
3313 }
3314
3315 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3316 {
3317 int status;
3318 status = decode_op_hdr(xdr, OP_LOCKT);
3319 if (status == -NFS4ERR_DENIED)
3320 return decode_lock_denied(xdr, res->denied);
3321 return status;
3322 }
3323
3324 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3325 {
3326 __be32 *p;
3327 int status;
3328
3329 status = decode_op_hdr(xdr, OP_LOCKU);
3330 if (status != -EIO)
3331 nfs_increment_lock_seqid(status, res->seqid);
3332 if (status == 0) {
3333 READ_BUF(NFS4_STATEID_SIZE);
3334 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3335 }
3336 return status;
3337 }
3338
3339 static int decode_lookup(struct xdr_stream *xdr)
3340 {
3341 return decode_op_hdr(xdr, OP_LOOKUP);
3342 }
3343
3344 /* This is too sick! */
3345 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3346 {
3347 __be32 *p;
3348 uint32_t limit_type, nblocks, blocksize;
3349
3350 READ_BUF(12);
3351 READ32(limit_type);
3352 switch (limit_type) {
3353 case 1:
3354 READ64(*maxsize);
3355 break;
3356 case 2:
3357 READ32(nblocks);
3358 READ32(blocksize);
3359 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3360 }
3361 return 0;
3362 }
3363
3364 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3365 {
3366 __be32 *p;
3367 uint32_t delegation_type;
3368
3369 READ_BUF(4);
3370 READ32(delegation_type);
3371 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3372 res->delegation_type = 0;
3373 return 0;
3374 }
3375 READ_BUF(NFS4_STATEID_SIZE+4);
3376 COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3377 READ32(res->do_recall);
3378 switch (delegation_type) {
3379 case NFS4_OPEN_DELEGATE_READ:
3380 res->delegation_type = FMODE_READ;
3381 break;
3382 case NFS4_OPEN_DELEGATE_WRITE:
3383 res->delegation_type = FMODE_WRITE|FMODE_READ;
3384 if (decode_space_limit(xdr, &res->maxsize) < 0)
3385 return -EIO;
3386 }
3387 return decode_ace(xdr, NULL, res->server->nfs_client);
3388 }
3389
3390 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3391 {
3392 __be32 *p;
3393 uint32_t savewords, bmlen, i;
3394 int status;
3395
3396 status = decode_op_hdr(xdr, OP_OPEN);
3397 if (status != -EIO)
3398 nfs_increment_open_seqid(status, res->seqid);
3399 if (status)
3400 return status;
3401 READ_BUF(NFS4_STATEID_SIZE);
3402 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3403
3404 decode_change_info(xdr, &res->cinfo);
3405
3406 READ_BUF(8);
3407 READ32(res->rflags);
3408 READ32(bmlen);
3409 if (bmlen > 10)
3410 goto xdr_error;
3411
3412 READ_BUF(bmlen << 2);
3413 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3414 for (i = 0; i < savewords; ++i)
3415 READ32(res->attrset[i]);
3416 for (; i < NFS4_BITMAP_SIZE; i++)
3417 res->attrset[i] = 0;
3418
3419 return decode_delegation(xdr, res);
3420 xdr_error:
3421 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3422 return -EIO;
3423 }
3424
3425 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3426 {
3427 __be32 *p;
3428 int status;
3429
3430 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3431 if (status != -EIO)
3432 nfs_increment_open_seqid(status, res->seqid);
3433 if (status)
3434 return status;
3435 READ_BUF(NFS4_STATEID_SIZE);
3436 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3437 return 0;
3438 }
3439
3440 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3441 {
3442 __be32 *p;
3443 int status;
3444
3445 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3446 if (status != -EIO)
3447 nfs_increment_open_seqid(status, res->seqid);
3448 if (status)
3449 return status;
3450 READ_BUF(NFS4_STATEID_SIZE);
3451 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3452 return 0;
3453 }
3454
3455 static int decode_putfh(struct xdr_stream *xdr)
3456 {
3457 return decode_op_hdr(xdr, OP_PUTFH);
3458 }
3459
3460 static int decode_putrootfh(struct xdr_stream *xdr)
3461 {
3462 return decode_op_hdr(xdr, OP_PUTROOTFH);
3463 }
3464
3465 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3466 {
3467 struct kvec *iov = req->rq_rcv_buf.head;
3468 __be32 *p;
3469 uint32_t count, eof, recvd, hdrlen;
3470 int status;
3471
3472 status = decode_op_hdr(xdr, OP_READ);
3473 if (status)
3474 return status;
3475 READ_BUF(8);
3476 READ32(eof);
3477 READ32(count);
3478 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3479 recvd = req->rq_rcv_buf.len - hdrlen;
3480 if (count > recvd) {
3481 dprintk("NFS: server cheating in read reply: "
3482 "count %u > recvd %u\n", count, recvd);
3483 count = recvd;
3484 eof = 0;
3485 }
3486 xdr_read_pages(xdr, count);
3487 res->eof = eof;
3488 res->count = count;
3489 return 0;
3490 }
3491
3492 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3493 {
3494 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3495 struct page *page = *rcvbuf->pages;
3496 struct kvec *iov = rcvbuf->head;
3497 size_t hdrlen;
3498 u32 recvd, pglen = rcvbuf->page_len;
3499 __be32 *end, *entry, *p, *kaddr;
3500 unsigned int nr = 0;
3501 int status;
3502
3503 status = decode_op_hdr(xdr, OP_READDIR);
3504 if (status)
3505 return status;
3506 READ_BUF(8);
3507 COPYMEM(readdir->verifier.data, 8);
3508 dprintk("%s: verifier = %08x:%08x\n",
3509 __func__,
3510 ((u32 *)readdir->verifier.data)[0],
3511 ((u32 *)readdir->verifier.data)[1]);
3512
3513
3514 hdrlen = (char *) p - (char *) iov->iov_base;
3515 recvd = rcvbuf->len - hdrlen;
3516 if (pglen > recvd)
3517 pglen = recvd;
3518 xdr_read_pages(xdr, pglen);
3519
3520 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3521 kaddr = p = kmap_atomic(page, KM_USER0);
3522 end = p + ((pglen + readdir->pgbase) >> 2);
3523 entry = p;
3524
3525 /* Make sure the packet actually has a value_follows and EOF entry */
3526 if ((entry + 1) > end)
3527 goto short_pkt;
3528
3529 for (; *p++; nr++) {
3530 u32 len, attrlen, xlen;
3531 if (end - p < 3)
3532 goto short_pkt;
3533 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3534 p += 2; /* cookie */
3535 len = ntohl(*p++); /* filename length */
3536 if (len > NFS4_MAXNAMLEN) {
3537 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3538 len);
3539 goto err_unmap;
3540 }
3541 xlen = XDR_QUADLEN(len);
3542 if (end - p < xlen + 1)
3543 goto short_pkt;
3544 dprintk("filename = %*s\n", len, (char *)p);
3545 p += xlen;
3546 len = ntohl(*p++); /* bitmap length */
3547 if (end - p < len + 1)
3548 goto short_pkt;
3549 p += len;
3550 attrlen = XDR_QUADLEN(ntohl(*p++));
3551 if (end - p < attrlen + 2)
3552 goto short_pkt;
3553 p += attrlen; /* attributes */
3554 entry = p;
3555 }
3556 /*
3557 * Apparently some server sends responses that are a valid size, but
3558 * contain no entries, and have value_follows==0 and EOF==0. For
3559 * those, just set the EOF marker.
3560 */
3561 if (!nr && entry[1] == 0) {
3562 dprintk("NFS: readdir reply truncated!\n");
3563 entry[1] = 1;
3564 }
3565 out:
3566 kunmap_atomic(kaddr, KM_USER0);
3567 return 0;
3568 short_pkt:
3569 /*
3570 * When we get a short packet there are 2 possibilities. We can
3571 * return an error, or fix up the response to look like a valid
3572 * response and return what we have so far. If there are no
3573 * entries and the packet was short, then return -EIO. If there
3574 * are valid entries in the response, return them and pretend that
3575 * the call was successful, but incomplete. The caller can retry the
3576 * readdir starting at the last cookie.
3577 */
3578 dprintk("%s: short packet at entry %d\n", __func__, nr);
3579 entry[0] = entry[1] = 0;
3580 if (nr)
3581 goto out;
3582 err_unmap:
3583 kunmap_atomic(kaddr, KM_USER0);
3584 return -errno_NFSERR_IO;
3585 }
3586
3587 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3588 {
3589 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3590 struct kvec *iov = rcvbuf->head;
3591 size_t hdrlen;
3592 u32 len, recvd;
3593 __be32 *p;
3594 char *kaddr;
3595 int status;
3596
3597 status = decode_op_hdr(xdr, OP_READLINK);
3598 if (status)
3599 return status;
3600
3601 /* Convert length of symlink */
3602 READ_BUF(4);
3603 READ32(len);
3604 if (len >= rcvbuf->page_len || len <= 0) {
3605 dprintk("nfs: server returned giant symlink!\n");
3606 return -ENAMETOOLONG;
3607 }
3608 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3609 recvd = req->rq_rcv_buf.len - hdrlen;
3610 if (recvd < len) {
3611 dprintk("NFS: server cheating in readlink reply: "
3612 "count %u > recvd %u\n", len, recvd);
3613 return -EIO;
3614 }
3615 xdr_read_pages(xdr, len);
3616 /*
3617 * The XDR encode routine has set things up so that
3618 * the link text will be copied directly into the
3619 * buffer. We just have to do overflow-checking,
3620 * and and null-terminate the text (the VFS expects
3621 * null-termination).
3622 */
3623 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3624 kaddr[len+rcvbuf->page_base] = '\0';
3625 kunmap_atomic(kaddr, KM_USER0);
3626 return 0;
3627 }
3628
3629 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3630 {
3631 int status;
3632
3633 status = decode_op_hdr(xdr, OP_REMOVE);
3634 if (status)
3635 goto out;
3636 status = decode_change_info(xdr, cinfo);
3637 out:
3638 return status;
3639 }
3640
3641 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3642 struct nfs4_change_info *new_cinfo)
3643 {
3644 int status;
3645
3646 status = decode_op_hdr(xdr, OP_RENAME);
3647 if (status)
3648 goto out;
3649 if ((status = decode_change_info(xdr, old_cinfo)))
3650 goto out;
3651 status = decode_change_info(xdr, new_cinfo);
3652 out:
3653 return status;
3654 }
3655
3656 static int decode_renew(struct xdr_stream *xdr)
3657 {
3658 return decode_op_hdr(xdr, OP_RENEW);
3659 }
3660
3661 static int
3662 decode_restorefh(struct xdr_stream *xdr)
3663 {
3664 return decode_op_hdr(xdr, OP_RESTOREFH);
3665 }
3666
3667 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3668 size_t *acl_len)
3669 {
3670 __be32 *savep;
3671 uint32_t attrlen,
3672 bitmap[2] = {0};
3673 struct kvec *iov = req->rq_rcv_buf.head;
3674 int status;
3675
3676 *acl_len = 0;
3677 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3678 goto out;
3679 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3680 goto out;
3681 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3682 goto out;
3683
3684 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3685 return -EIO;
3686 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3687 size_t hdrlen;
3688 u32 recvd;
3689
3690 /* We ignore &savep and don't do consistency checks on
3691 * the attr length. Let userspace figure it out.... */
3692 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3693 recvd = req->rq_rcv_buf.len - hdrlen;
3694 if (attrlen > recvd) {
3695 dprintk("NFS: server cheating in getattr"
3696 " acl reply: attrlen %u > recvd %u\n",
3697 attrlen, recvd);
3698 return -EINVAL;
3699 }
3700 xdr_read_pages(xdr, attrlen);
3701 *acl_len = attrlen;
3702 } else
3703 status = -EOPNOTSUPP;
3704
3705 out:
3706 return status;
3707 }
3708
3709 static int
3710 decode_savefh(struct xdr_stream *xdr)
3711 {
3712 return decode_op_hdr(xdr, OP_SAVEFH);
3713 }
3714
3715 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3716 {
3717 __be32 *p;
3718 uint32_t bmlen;
3719 int status;
3720
3721
3722 status = decode_op_hdr(xdr, OP_SETATTR);
3723 if (status)
3724 return status;
3725 READ_BUF(4);
3726 READ32(bmlen);
3727 READ_BUF(bmlen << 2);
3728 return 0;
3729 }
3730
3731 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3732 {
3733 __be32 *p;
3734 uint32_t opnum;
3735 int32_t nfserr;
3736
3737 READ_BUF(8);
3738 READ32(opnum);
3739 if (opnum != OP_SETCLIENTID) {
3740 dprintk("nfs: decode_setclientid: Server returned operation"
3741 " %d\n", opnum);
3742 return -EIO;
3743 }
3744 READ32(nfserr);
3745 if (nfserr == NFS_OK) {
3746 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3747 READ64(clp->cl_clientid);
3748 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3749 } else if (nfserr == NFSERR_CLID_INUSE) {
3750 uint32_t len;
3751
3752 /* skip netid string */
3753 READ_BUF(4);
3754 READ32(len);
3755 READ_BUF(len);
3756
3757 /* skip uaddr string */
3758 READ_BUF(4);
3759 READ32(len);
3760 READ_BUF(len);
3761 return -NFSERR_CLID_INUSE;
3762 } else
3763 return nfs4_stat_to_errno(nfserr);
3764
3765 return 0;
3766 }
3767
3768 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3769 {
3770 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3771 }
3772
3773 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3774 {
3775 __be32 *p;
3776 int status;
3777
3778 status = decode_op_hdr(xdr, OP_WRITE);
3779 if (status)
3780 return status;
3781
3782 READ_BUF(16);
3783 READ32(res->count);
3784 READ32(res->verf->committed);
3785 COPYMEM(res->verf->verifier, 8);
3786 return 0;
3787 }
3788
3789 static int decode_delegreturn(struct xdr_stream *xdr)
3790 {
3791 return decode_op_hdr(xdr, OP_DELEGRETURN);
3792 }
3793
3794 /*
3795 * Decode OPEN_DOWNGRADE response
3796 */
3797 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3798 {
3799 struct xdr_stream xdr;
3800 struct compound_hdr hdr;
3801 int status;
3802
3803 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3804 status = decode_compound_hdr(&xdr, &hdr);
3805 if (status)
3806 goto out;
3807 status = decode_putfh(&xdr);
3808 if (status)
3809 goto out;
3810 status = decode_open_downgrade(&xdr, res);
3811 if (status != 0)
3812 goto out;
3813 decode_getfattr(&xdr, res->fattr, res->server);
3814 out:
3815 return status;
3816 }
3817
3818 /*
3819 * END OF "GENERIC" DECODE ROUTINES.
3820 */
3821
3822 /*
3823 * Decode ACCESS response
3824 */
3825 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3826 {
3827 struct xdr_stream xdr;
3828 struct compound_hdr hdr;
3829 int status;
3830
3831 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3832 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3833 goto out;
3834 status = decode_putfh(&xdr);
3835 if (status != 0)
3836 goto out;
3837 status = decode_access(&xdr, res);
3838 if (status != 0)
3839 goto out;
3840 decode_getfattr(&xdr, res->fattr, res->server);
3841 out:
3842 return status;
3843 }
3844
3845 /*
3846 * Decode LOOKUP response
3847 */
3848 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3849 {
3850 struct xdr_stream xdr;
3851 struct compound_hdr hdr;
3852 int status;
3853
3854 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3855 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3856 goto out;
3857 if ((status = decode_putfh(&xdr)) != 0)
3858 goto out;
3859 if ((status = decode_lookup(&xdr)) != 0)
3860 goto out;
3861 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3862 goto out;
3863 status = decode_getfattr(&xdr, res->fattr, res->server);
3864 out:
3865 return status;
3866 }
3867
3868 /*
3869 * Decode LOOKUP_ROOT response
3870 */
3871 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3872 {
3873 struct xdr_stream xdr;
3874 struct compound_hdr hdr;
3875 int status;
3876
3877 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3878 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3879 goto out;
3880 if ((status = decode_putrootfh(&xdr)) != 0)
3881 goto out;
3882 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3883 status = decode_getfattr(&xdr, res->fattr, res->server);
3884 out:
3885 return status;
3886 }
3887
3888 /*
3889 * Decode REMOVE response
3890 */
3891 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3892 {
3893 struct xdr_stream xdr;
3894 struct compound_hdr hdr;
3895 int status;
3896
3897 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3898 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3899 goto out;
3900 if ((status = decode_putfh(&xdr)) != 0)
3901 goto out;
3902 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3903 goto out;
3904 decode_getfattr(&xdr, &res->dir_attr, res->server);
3905 out:
3906 return status;
3907 }
3908
3909 /*
3910 * Decode RENAME response
3911 */
3912 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3913 {
3914 struct xdr_stream xdr;
3915 struct compound_hdr hdr;
3916 int status;
3917
3918 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3919 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3920 goto out;
3921 if ((status = decode_putfh(&xdr)) != 0)
3922 goto out;
3923 if ((status = decode_savefh(&xdr)) != 0)
3924 goto out;
3925 if ((status = decode_putfh(&xdr)) != 0)
3926 goto out;
3927 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3928 goto out;
3929 /* Current FH is target directory */
3930 if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3931 goto out;
3932 if ((status = decode_restorefh(&xdr)) != 0)
3933 goto out;
3934 decode_getfattr(&xdr, res->old_fattr, res->server);
3935 out:
3936 return status;
3937 }
3938
3939 /*
3940 * Decode LINK response
3941 */
3942 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3943 {
3944 struct xdr_stream xdr;
3945 struct compound_hdr hdr;
3946 int status;
3947
3948 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3949 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3950 goto out;
3951 if ((status = decode_putfh(&xdr)) != 0)
3952 goto out;
3953 if ((status = decode_savefh(&xdr)) != 0)
3954 goto out;
3955 if ((status = decode_putfh(&xdr)) != 0)
3956 goto out;
3957 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3958 goto out;
3959 /*
3960 * Note order: OP_LINK leaves the directory as the current
3961 * filehandle.
3962 */
3963 if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3964 goto out;
3965 if ((status = decode_restorefh(&xdr)) != 0)
3966 goto out;
3967 decode_getfattr(&xdr, res->fattr, res->server);
3968 out:
3969 return status;
3970 }
3971
3972 /*
3973 * Decode CREATE response
3974 */
3975 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3976 {
3977 struct xdr_stream xdr;
3978 struct compound_hdr hdr;
3979 int status;
3980
3981 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3982 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3983 goto out;
3984 if ((status = decode_putfh(&xdr)) != 0)
3985 goto out;
3986 if ((status = decode_savefh(&xdr)) != 0)
3987 goto out;
3988 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3989 goto out;
3990 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3991 goto out;
3992 if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3993 goto out;
3994 if ((status = decode_restorefh(&xdr)) != 0)
3995 goto out;
3996 decode_getfattr(&xdr, res->dir_fattr, res->server);
3997 out:
3998 return status;
3999 }
4000
4001 /*
4002 * Decode SYMLINK response
4003 */
4004 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4005 {
4006 return nfs4_xdr_dec_create(rqstp, p, res);
4007 }
4008
4009 /*
4010 * Decode GETATTR response
4011 */
4012 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4013 {
4014 struct xdr_stream xdr;
4015 struct compound_hdr hdr;
4016 int status;
4017
4018 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4019 status = decode_compound_hdr(&xdr, &hdr);
4020 if (status)
4021 goto out;
4022 status = decode_putfh(&xdr);
4023 if (status)
4024 goto out;
4025 status = decode_getfattr(&xdr, res->fattr, res->server);
4026 out:
4027 return status;
4028
4029 }
4030
4031 /*
4032 * Encode an SETACL request
4033 */
4034 static int
4035 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4036 {
4037 struct xdr_stream xdr;
4038 struct compound_hdr hdr = {
4039 .nops = 2,
4040 };
4041 int status;
4042
4043 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4044 encode_compound_hdr(&xdr, &hdr);
4045 status = encode_putfh(&xdr, args->fh);
4046 if (status)
4047 goto out;
4048 status = encode_setacl(&xdr, args);
4049 out:
4050 return status;
4051 }
4052 /*
4053 * Decode SETACL response
4054 */
4055 static int
4056 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4057 {
4058 struct xdr_stream xdr;
4059 struct compound_hdr hdr;
4060 int status;
4061
4062 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4063 status = decode_compound_hdr(&xdr, &hdr);
4064 if (status)
4065 goto out;
4066 status = decode_putfh(&xdr);
4067 if (status)
4068 goto out;
4069 status = decode_setattr(&xdr, res);
4070 out:
4071 return status;
4072 }
4073
4074 /*
4075 * Decode GETACL response
4076 */
4077 static int
4078 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4079 {
4080 struct xdr_stream xdr;
4081 struct compound_hdr hdr;
4082 int status;
4083
4084 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4085 status = decode_compound_hdr(&xdr, &hdr);
4086 if (status)
4087 goto out;
4088 status = decode_putfh(&xdr);
4089 if (status)
4090 goto out;
4091 status = decode_getacl(&xdr, rqstp, acl_len);
4092
4093 out:
4094 return status;
4095 }
4096
4097 /*
4098 * Decode CLOSE response
4099 */
4100 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4101 {
4102 struct xdr_stream xdr;
4103 struct compound_hdr hdr;
4104 int status;
4105
4106 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4107 status = decode_compound_hdr(&xdr, &hdr);
4108 if (status)
4109 goto out;
4110 status = decode_putfh(&xdr);
4111 if (status)
4112 goto out;
4113 status = decode_close(&xdr, res);
4114 if (status != 0)
4115 goto out;
4116 /*
4117 * Note: Server may do delete on close for this file
4118 * in which case the getattr call will fail with
4119 * an ESTALE error. Shouldn't be a problem,
4120 * though, since fattr->valid will remain unset.
4121 */
4122 decode_getfattr(&xdr, res->fattr, res->server);
4123 out:
4124 return status;
4125 }
4126
4127 /*
4128 * Decode OPEN response
4129 */
4130 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4131 {
4132 struct xdr_stream xdr;
4133 struct compound_hdr hdr;
4134 int status;
4135
4136 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4137 status = decode_compound_hdr(&xdr, &hdr);
4138 if (status)
4139 goto out;
4140 status = decode_putfh(&xdr);
4141 if (status)
4142 goto out;
4143 status = decode_savefh(&xdr);
4144 if (status)
4145 goto out;
4146 status = decode_open(&xdr, res);
4147 if (status)
4148 goto out;
4149 if (decode_getfh(&xdr, &res->fh) != 0)
4150 goto out;
4151 if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4152 goto out;
4153 if (decode_restorefh(&xdr) != 0)
4154 goto out;
4155 decode_getfattr(&xdr, res->dir_attr, res->server);
4156 out:
4157 return status;
4158 }
4159
4160 /*
4161 * Decode OPEN_CONFIRM response
4162 */
4163 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4164 {
4165 struct xdr_stream xdr;
4166 struct compound_hdr hdr;
4167 int status;
4168
4169 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4170 status = decode_compound_hdr(&xdr, &hdr);
4171 if (status)
4172 goto out;
4173 status = decode_putfh(&xdr);
4174 if (status)
4175 goto out;
4176 status = decode_open_confirm(&xdr, res);
4177 out:
4178 return status;
4179 }
4180
4181 /*
4182 * Decode OPEN response
4183 */
4184 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4185 {
4186 struct xdr_stream xdr;
4187 struct compound_hdr hdr;
4188 int status;
4189
4190 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4191 status = decode_compound_hdr(&xdr, &hdr);
4192 if (status)
4193 goto out;
4194 status = decode_putfh(&xdr);
4195 if (status)
4196 goto out;
4197 status = decode_open(&xdr, res);
4198 if (status)
4199 goto out;
4200 decode_getfattr(&xdr, res->f_attr, res->server);
4201 out:
4202 return status;
4203 }
4204
4205 /*
4206 * Decode SETATTR response
4207 */
4208 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4209 {
4210 struct xdr_stream xdr;
4211 struct compound_hdr hdr;
4212 int status;
4213
4214 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4215 status = decode_compound_hdr(&xdr, &hdr);
4216 if (status)
4217 goto out;
4218 status = decode_putfh(&xdr);
4219 if (status)
4220 goto out;
4221 status = decode_setattr(&xdr, res);
4222 if (status)
4223 goto out;
4224 status = decode_getfattr(&xdr, res->fattr, res->server);
4225 if (status == NFS4ERR_DELAY)
4226 status = 0;
4227 out:
4228 return status;
4229 }
4230
4231 /*
4232 * Decode LOCK response
4233 */
4234 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4235 {
4236 struct xdr_stream xdr;
4237 struct compound_hdr hdr;
4238 int status;
4239
4240 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4241 status = decode_compound_hdr(&xdr, &hdr);
4242 if (status)
4243 goto out;
4244 status = decode_putfh(&xdr);
4245 if (status)
4246 goto out;
4247 status = decode_lock(&xdr, res);
4248 out:
4249 return status;
4250 }
4251
4252 /*
4253 * Decode LOCKT response
4254 */
4255 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4256 {
4257 struct xdr_stream xdr;
4258 struct compound_hdr hdr;
4259 int status;
4260
4261 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4262 status = decode_compound_hdr(&xdr, &hdr);
4263 if (status)
4264 goto out;
4265 status = decode_putfh(&xdr);
4266 if (status)
4267 goto out;
4268 status = decode_lockt(&xdr, res);
4269 out:
4270 return status;
4271 }
4272
4273 /*
4274 * Decode LOCKU response
4275 */
4276 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4277 {
4278 struct xdr_stream xdr;
4279 struct compound_hdr hdr;
4280 int status;
4281
4282 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4283 status = decode_compound_hdr(&xdr, &hdr);
4284 if (status)
4285 goto out;
4286 status = decode_putfh(&xdr);
4287 if (status)
4288 goto out;
4289 status = decode_locku(&xdr, res);
4290 out:
4291 return status;
4292 }
4293
4294 /*
4295 * Decode READLINK response
4296 */
4297 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4298 {
4299 struct xdr_stream xdr;
4300 struct compound_hdr hdr;
4301 int status;
4302
4303 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4304 status = decode_compound_hdr(&xdr, &hdr);
4305 if (status)
4306 goto out;
4307 status = decode_putfh(&xdr);
4308 if (status)
4309 goto out;
4310 status = decode_readlink(&xdr, rqstp);
4311 out:
4312 return status;
4313 }
4314
4315 /*
4316 * Decode READDIR response
4317 */
4318 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4319 {
4320 struct xdr_stream xdr;
4321 struct compound_hdr hdr;
4322 int status;
4323
4324 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4325 status = decode_compound_hdr(&xdr, &hdr);
4326 if (status)
4327 goto out;
4328 status = decode_putfh(&xdr);
4329 if (status)
4330 goto out;
4331 status = decode_readdir(&xdr, rqstp, res);
4332 out:
4333 return status;
4334 }
4335
4336 /*
4337 * Decode Read response
4338 */
4339 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4340 {
4341 struct xdr_stream xdr;
4342 struct compound_hdr hdr;
4343 int status;
4344
4345 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4346 status = decode_compound_hdr(&xdr, &hdr);
4347 if (status)
4348 goto out;
4349 status = decode_putfh(&xdr);
4350 if (status)
4351 goto out;
4352 status = decode_read(&xdr, rqstp, res);
4353 if (!status)
4354 status = res->count;
4355 out:
4356 return status;
4357 }
4358
4359 /*
4360 * Decode WRITE response
4361 */
4362 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4363 {
4364 struct xdr_stream xdr;
4365 struct compound_hdr hdr;
4366 int status;
4367
4368 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4369 status = decode_compound_hdr(&xdr, &hdr);
4370 if (status)
4371 goto out;
4372 status = decode_putfh(&xdr);
4373 if (status)
4374 goto out;
4375 status = decode_write(&xdr, res);
4376 if (status)
4377 goto out;
4378 decode_getfattr(&xdr, res->fattr, res->server);
4379 if (!status)
4380 status = res->count;
4381 out:
4382 return status;
4383 }
4384
4385 /*
4386 * Decode COMMIT response
4387 */
4388 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4389 {
4390 struct xdr_stream xdr;
4391 struct compound_hdr hdr;
4392 int status;
4393
4394 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4395 status = decode_compound_hdr(&xdr, &hdr);
4396 if (status)
4397 goto out;
4398 status = decode_putfh(&xdr);
4399 if (status)
4400 goto out;
4401 status = decode_commit(&xdr, res);
4402 if (status)
4403 goto out;
4404 decode_getfattr(&xdr, res->fattr, res->server);
4405 out:
4406 return status;
4407 }
4408
4409 /*
4410 * FSINFO request
4411 */
4412 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4413 {
4414 struct xdr_stream xdr;
4415 struct compound_hdr hdr;
4416 int status;
4417
4418 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4419 status = decode_compound_hdr(&xdr, &hdr);
4420 if (!status)
4421 status = decode_putfh(&xdr);
4422 if (!status)
4423 status = decode_fsinfo(&xdr, fsinfo);
4424 if (!status)
4425 status = nfs4_stat_to_errno(hdr.status);
4426 return status;
4427 }
4428
4429 /*
4430 * PATHCONF request
4431 */
4432 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4433 {
4434 struct xdr_stream xdr;
4435 struct compound_hdr hdr;
4436 int status;
4437
4438 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4439 status = decode_compound_hdr(&xdr, &hdr);
4440 if (!status)
4441 status = decode_putfh(&xdr);
4442 if (!status)
4443 status = decode_pathconf(&xdr, pathconf);
4444 return status;
4445 }
4446
4447 /*
4448 * STATFS request
4449 */
4450 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4451 {
4452 struct xdr_stream xdr;
4453 struct compound_hdr hdr;
4454 int status;
4455
4456 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4457 status = decode_compound_hdr(&xdr, &hdr);
4458 if (!status)
4459 status = decode_putfh(&xdr);
4460 if (!status)
4461 status = decode_statfs(&xdr, fsstat);
4462 return status;
4463 }
4464
4465 /*
4466 * GETATTR_BITMAP request
4467 */
4468 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4469 {
4470 struct xdr_stream xdr;
4471 struct compound_hdr hdr;
4472 int status;
4473
4474 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4475 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4476 goto out;
4477 if ((status = decode_putfh(&xdr)) != 0)
4478 goto out;
4479 status = decode_server_caps(&xdr, res);
4480 out:
4481 return status;
4482 }
4483
4484 /*
4485 * Decode RENEW response
4486 */
4487 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4488 {
4489 struct xdr_stream xdr;
4490 struct compound_hdr hdr;
4491 int status;
4492
4493 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4494 status = decode_compound_hdr(&xdr, &hdr);
4495 if (!status)
4496 status = decode_renew(&xdr);
4497 return status;
4498 }
4499
4500 /*
4501 * a SETCLIENTID request
4502 */
4503 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4504 struct nfs_client *clp)
4505 {
4506 struct xdr_stream xdr;
4507 struct compound_hdr hdr;
4508 int status;
4509
4510 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4511 status = decode_compound_hdr(&xdr, &hdr);
4512 if (!status)
4513 status = decode_setclientid(&xdr, clp);
4514 if (!status)
4515 status = nfs4_stat_to_errno(hdr.status);
4516 return status;
4517 }
4518
4519 /*
4520 * a SETCLIENTID_CONFIRM request
4521 */
4522 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4523 {
4524 struct xdr_stream xdr;
4525 struct compound_hdr hdr;
4526 int status;
4527
4528 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4529 status = decode_compound_hdr(&xdr, &hdr);
4530 if (!status)
4531 status = decode_setclientid_confirm(&xdr);
4532 if (!status)
4533 status = decode_putrootfh(&xdr);
4534 if (!status)
4535 status = decode_fsinfo(&xdr, fsinfo);
4536 if (!status)
4537 status = nfs4_stat_to_errno(hdr.status);
4538 return status;
4539 }
4540
4541 /*
4542 * DELEGRETURN request
4543 */
4544 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4545 {
4546 struct xdr_stream xdr;
4547 struct compound_hdr hdr;
4548 int status;
4549
4550 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4551 status = decode_compound_hdr(&xdr, &hdr);
4552 if (status != 0)
4553 goto out;
4554 status = decode_putfh(&xdr);
4555 if (status != 0)
4556 goto out;
4557 status = decode_delegreturn(&xdr);
4558 decode_getfattr(&xdr, res->fattr, res->server);
4559 out:
4560 return status;
4561 }
4562
4563 /*
4564 * FS_LOCATIONS request
4565 */
4566 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4567 {
4568 struct xdr_stream xdr;
4569 struct compound_hdr hdr;
4570 int status;
4571
4572 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4573 status = decode_compound_hdr(&xdr, &hdr);
4574 if (status != 0)
4575 goto out;
4576 if ((status = decode_putfh(&xdr)) != 0)
4577 goto out;
4578 if ((status = decode_lookup(&xdr)) != 0)
4579 goto out;
4580 xdr_enter_page(&xdr, PAGE_SIZE);
4581 status = decode_getfattr(&xdr, &res->fattr, res->server);
4582 out:
4583 return status;
4584 }
4585
4586 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4587 {
4588 uint32_t bitmap[2] = {0};
4589 uint32_t len;
4590
4591 if (!*p++) {
4592 if (!*p)
4593 return ERR_PTR(-EAGAIN);
4594 entry->eof = 1;
4595 return ERR_PTR(-EBADCOOKIE);
4596 }
4597
4598 entry->prev_cookie = entry->cookie;
4599 p = xdr_decode_hyper(p, &entry->cookie);
4600 entry->len = ntohl(*p++);
4601 entry->name = (const char *) p;
4602 p += XDR_QUADLEN(entry->len);
4603
4604 /*
4605 * In case the server doesn't return an inode number,
4606 * we fake one here. (We don't use inode number 0,
4607 * since glibc seems to choke on it...)
4608 */
4609 entry->ino = 1;
4610
4611 len = ntohl(*p++); /* bitmap length */
4612 if (len-- > 0) {
4613 bitmap[0] = ntohl(*p++);
4614 if (len-- > 0) {
4615 bitmap[1] = ntohl(*p++);
4616 p += len;
4617 }
4618 }
4619 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4620 if (len > 0) {
4621 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4622 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4623 /* Ignore the return value of rdattr_error for now */
4624 p++;
4625 len--;
4626 }
4627 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4628 xdr_decode_hyper(p, &entry->ino);
4629 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4630 xdr_decode_hyper(p, &entry->ino);
4631 p += len;
4632 }
4633
4634 entry->eof = !p[0] && p[1];
4635 return p;
4636 }
4637
4638 /*
4639 * We need to translate between nfs status return values and
4640 * the local errno values which may not be the same.
4641 */
4642 static struct {
4643 int stat;
4644 int errno;
4645 } nfs_errtbl[] = {
4646 { NFS4_OK, 0 },
4647 { NFS4ERR_PERM, -EPERM },
4648 { NFS4ERR_NOENT, -ENOENT },
4649 { NFS4ERR_IO, -errno_NFSERR_IO},
4650 { NFS4ERR_NXIO, -ENXIO },
4651 { NFS4ERR_ACCESS, -EACCES },
4652 { NFS4ERR_EXIST, -EEXIST },
4653 { NFS4ERR_XDEV, -EXDEV },
4654 { NFS4ERR_NOTDIR, -ENOTDIR },
4655 { NFS4ERR_ISDIR, -EISDIR },
4656 { NFS4ERR_INVAL, -EINVAL },
4657 { NFS4ERR_FBIG, -EFBIG },
4658 { NFS4ERR_NOSPC, -ENOSPC },
4659 { NFS4ERR_ROFS, -EROFS },
4660 { NFS4ERR_MLINK, -EMLINK },
4661 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
4662 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
4663 { NFS4ERR_DQUOT, -EDQUOT },
4664 { NFS4ERR_STALE, -ESTALE },
4665 { NFS4ERR_BADHANDLE, -EBADHANDLE },
4666 { NFS4ERR_BADOWNER, -EINVAL },
4667 { NFS4ERR_BADNAME, -EINVAL },
4668 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
4669 { NFS4ERR_NOTSUPP, -ENOTSUPP },
4670 { NFS4ERR_TOOSMALL, -ETOOSMALL },
4671 { NFS4ERR_SERVERFAULT, -ESERVERFAULT },
4672 { NFS4ERR_BADTYPE, -EBADTYPE },
4673 { NFS4ERR_LOCKED, -EAGAIN },
4674 { NFS4ERR_RESOURCE, -EREMOTEIO },
4675 { NFS4ERR_SYMLINK, -ELOOP },
4676 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
4677 { NFS4ERR_DEADLOCK, -EDEADLK },
4678 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
4679 * to be handled by a
4680 * middle-layer.
4681 */
4682 { -1, -EIO }
4683 };
4684
4685 /*
4686 * Convert an NFS error code to a local one.
4687 * This one is used jointly by NFSv2 and NFSv3.
4688 */
4689 static int
4690 nfs4_stat_to_errno(int stat)
4691 {
4692 int i;
4693 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4694 if (nfs_errtbl[i].stat == stat)
4695 return nfs_errtbl[i].errno;
4696 }
4697 if (stat <= 10000 || stat > 10100) {
4698 /* The server is looney tunes. */
4699 return -ESERVERFAULT;
4700 }
4701 /* If we cannot translate the error, the recovery routines should
4702 * handle it.
4703 * Note: remaining NFSv4 error codes have values > 10000, so should
4704 * not conflict with native Linux error codes.
4705 */
4706 return -stat;
4707 }
4708
4709 #define PROC(proc, argtype, restype) \
4710 [NFSPROC4_CLNT_##proc] = { \
4711 .p_proc = NFSPROC4_COMPOUND, \
4712 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4713 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
4714 .p_arglen = NFS4_##argtype##_sz, \
4715 .p_replen = NFS4_##restype##_sz, \
4716 .p_statidx = NFSPROC4_CLNT_##proc, \
4717 .p_name = #proc, \
4718 }
4719
4720 struct rpc_procinfo nfs4_procedures[] = {
4721 PROC(READ, enc_read, dec_read),
4722 PROC(WRITE, enc_write, dec_write),
4723 PROC(COMMIT, enc_commit, dec_commit),
4724 PROC(OPEN, enc_open, dec_open),
4725 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4726 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4727 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4728 PROC(CLOSE, enc_close, dec_close),
4729 PROC(SETATTR, enc_setattr, dec_setattr),
4730 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4731 PROC(RENEW, enc_renew, dec_renew),
4732 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4733 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4734 PROC(LOCK, enc_lock, dec_lock),
4735 PROC(LOCKT, enc_lockt, dec_lockt),
4736 PROC(LOCKU, enc_locku, dec_locku),
4737 PROC(ACCESS, enc_access, dec_access),
4738 PROC(GETATTR, enc_getattr, dec_getattr),
4739 PROC(LOOKUP, enc_lookup, dec_lookup),
4740 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4741 PROC(REMOVE, enc_remove, dec_remove),
4742 PROC(RENAME, enc_rename, dec_rename),
4743 PROC(LINK, enc_link, dec_link),
4744 PROC(SYMLINK, enc_symlink, dec_symlink),
4745 PROC(CREATE, enc_create, dec_create),
4746 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4747 PROC(STATFS, enc_statfs, dec_statfs),
4748 PROC(READLINK, enc_readlink, dec_readlink),
4749 PROC(READDIR, enc_readdir, dec_readdir),
4750 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4751 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
4752 PROC(GETACL, enc_getacl, dec_getacl),
4753 PROC(SETACL, enc_setacl, dec_setacl),
4754 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
4755 };
4756
4757 struct rpc_version nfs_version4 = {
4758 .number = 4,
4759 .nrprocs = ARRAY_SIZE(nfs4_procedures),
4760 .procs = nfs4_procedures
4761 };
4762
4763 /*
4764 * Local variables:
4765 * c-basic-offset: 8
4766 * End:
4767 */
CRIS linux kernel tree