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genirq, irq.h: Fix kernel-doc warnings
[linux-2.6/linux-2.6-openrd.git] / fs / nfs / nfs4xdr.c
blob1690f0e44b9169bf0d0277b98f1a43776b0bd18a
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 const umode_t nfs_type2fmt[] = {
526 [NF4BAD] = 0,
527 [NF4REG] = S_IFREG,
528 [NF4DIR] = S_IFDIR,
529 [NF4BLK] = S_IFBLK,
530 [NF4CHR] = S_IFCHR,
531 [NF4LNK] = S_IFLNK,
532 [NF4SOCK] = S_IFSOCK,
533 [NF4FIFO] = S_IFIFO,
534 [NF4ATTRDIR] = 0,
535 [NF4NAMEDATTR] = 0,
536 };
537
538 struct compound_hdr {
539 int32_t status;
540 uint32_t nops;
541 __be32 * nops_p;
542 uint32_t taglen;
543 char * tag;
544 };
545
546 /*
547 * START OF "GENERIC" ENCODE ROUTINES.
548 * These may look a little ugly since they are imported from a "generic"
549 * set of XDR encode/decode routines which are intended to be shared by
550 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
551 *
552 * If the pain of reading these is too great, it should be a straightforward
553 * task to translate them into Linux-specific versions which are more
554 * consistent with the style used in NFSv2/v3...
555 */
556 #define WRITE32(n) *p++ = htonl(n)
557 #define WRITE64(n) do { \
558 *p++ = htonl((uint32_t)((n) >> 32)); \
559 *p++ = htonl((uint32_t)(n)); \
560 } while (0)
561 #define WRITEMEM(ptr,nbytes) do { \
562 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
563 } while (0)
564
565 #define RESERVE_SPACE(nbytes) do { \
566 p = xdr_reserve_space(xdr, nbytes); \
567 BUG_ON(!p); \
568 } while (0)
569
570 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
571 {
572 __be32 *p;
573
574 p = xdr_reserve_space(xdr, 4 + len);
575 BUG_ON(p == NULL);
576 xdr_encode_opaque(p, str, len);
577 }
578
579 static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
580 {
581 __be32 *p;
582
583 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
584 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
585 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
586 WRITE32(hdr->taglen);
587 WRITEMEM(hdr->tag, hdr->taglen);
588 WRITE32(NFS4_MINOR_VERSION);
589 hdr->nops_p = p;
590 WRITE32(hdr->nops);
591 }
592
593 static void encode_nops(struct compound_hdr *hdr)
594 {
595 *hdr->nops_p = htonl(hdr->nops);
596 }
597
598 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
599 {
600 __be32 *p;
601
602 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
603 BUG_ON(p == NULL);
604 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
605 }
606
607 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
608 {
609 char owner_name[IDMAP_NAMESZ];
610 char owner_group[IDMAP_NAMESZ];
611 int owner_namelen = 0;
612 int owner_grouplen = 0;
613 __be32 *p;
614 __be32 *q;
615 int len;
616 uint32_t bmval0 = 0;
617 uint32_t bmval1 = 0;
618
619 /*
620 * We reserve enough space to write the entire attribute buffer at once.
621 * In the worst-case, this would be
622 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
623 * = 36 bytes, plus any contribution from variable-length fields
624 * such as owner/group.
625 */
626 len = 16;
627
628 /* Sigh */
629 if (iap->ia_valid & ATTR_SIZE)
630 len += 8;
631 if (iap->ia_valid & ATTR_MODE)
632 len += 4;
633 if (iap->ia_valid & ATTR_UID) {
634 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
635 if (owner_namelen < 0) {
636 dprintk("nfs: couldn't resolve uid %d to string\n",
637 iap->ia_uid);
638 /* XXX */
639 strcpy(owner_name, "nobody");
640 owner_namelen = sizeof("nobody") - 1;
641 /* goto out; */
642 }
643 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
644 }
645 if (iap->ia_valid & ATTR_GID) {
646 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
647 if (owner_grouplen < 0) {
648 dprintk("nfs: couldn't resolve gid %d to string\n",
649 iap->ia_gid);
650 strcpy(owner_group, "nobody");
651 owner_grouplen = sizeof("nobody") - 1;
652 /* goto out; */
653 }
654 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
655 }
656 if (iap->ia_valid & ATTR_ATIME_SET)
657 len += 16;
658 else if (iap->ia_valid & ATTR_ATIME)
659 len += 4;
660 if (iap->ia_valid & ATTR_MTIME_SET)
661 len += 16;
662 else if (iap->ia_valid & ATTR_MTIME)
663 len += 4;
664 RESERVE_SPACE(len);
665
666 /*
667 * We write the bitmap length now, but leave the bitmap and the attribute
668 * buffer length to be backfilled at the end of this routine.
669 */
670 WRITE32(2);
671 q = p;
672 p += 3;
673
674 if (iap->ia_valid & ATTR_SIZE) {
675 bmval0 |= FATTR4_WORD0_SIZE;
676 WRITE64(iap->ia_size);
677 }
678 if (iap->ia_valid & ATTR_MODE) {
679 bmval1 |= FATTR4_WORD1_MODE;
680 WRITE32(iap->ia_mode & S_IALLUGO);
681 }
682 if (iap->ia_valid & ATTR_UID) {
683 bmval1 |= FATTR4_WORD1_OWNER;
684 WRITE32(owner_namelen);
685 WRITEMEM(owner_name, owner_namelen);
686 }
687 if (iap->ia_valid & ATTR_GID) {
688 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
689 WRITE32(owner_grouplen);
690 WRITEMEM(owner_group, owner_grouplen);
691 }
692 if (iap->ia_valid & ATTR_ATIME_SET) {
693 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
694 WRITE32(NFS4_SET_TO_CLIENT_TIME);
695 WRITE32(0);
696 WRITE32(iap->ia_mtime.tv_sec);
697 WRITE32(iap->ia_mtime.tv_nsec);
698 }
699 else if (iap->ia_valid & ATTR_ATIME) {
700 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
701 WRITE32(NFS4_SET_TO_SERVER_TIME);
702 }
703 if (iap->ia_valid & ATTR_MTIME_SET) {
704 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
705 WRITE32(NFS4_SET_TO_CLIENT_TIME);
706 WRITE32(0);
707 WRITE32(iap->ia_mtime.tv_sec);
708 WRITE32(iap->ia_mtime.tv_nsec);
709 }
710 else if (iap->ia_valid & ATTR_MTIME) {
711 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
712 WRITE32(NFS4_SET_TO_SERVER_TIME);
713 }
714
715 /*
716 * Now we backfill the bitmap and the attribute buffer length.
717 */
718 if (len != ((char *)p - (char *)q) + 4) {
719 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
720 len, ((char *)p - (char *)q) + 4);
721 BUG();
722 }
723 len = (char *)p - (char *)q - 12;
724 *q++ = htonl(bmval0);
725 *q++ = htonl(bmval1);
726 *q++ = htonl(len);
727
728 /* out: */
729 }
730
731 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
732 {
733 __be32 *p;
734
735 RESERVE_SPACE(8);
736 WRITE32(OP_ACCESS);
737 WRITE32(access);
738 hdr->nops++;
739 }
740
741 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
742 {
743 __be32 *p;
744
745 RESERVE_SPACE(8+NFS4_STATEID_SIZE);
746 WRITE32(OP_CLOSE);
747 WRITE32(arg->seqid->sequence->counter);
748 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
749 hdr->nops++;
750 }
751
752 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
753 {
754 __be32 *p;
755
756 RESERVE_SPACE(16);
757 WRITE32(OP_COMMIT);
758 WRITE64(args->offset);
759 WRITE32(args->count);
760 hdr->nops++;
761 }
762
763 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
764 {
765 __be32 *p;
766
767 RESERVE_SPACE(8);
768 WRITE32(OP_CREATE);
769 WRITE32(create->ftype);
770
771 switch (create->ftype) {
772 case NF4LNK:
773 RESERVE_SPACE(4);
774 WRITE32(create->u.symlink.len);
775 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
776 break;
777
778 case NF4BLK: case NF4CHR:
779 RESERVE_SPACE(8);
780 WRITE32(create->u.device.specdata1);
781 WRITE32(create->u.device.specdata2);
782 break;
783
784 default:
785 break;
786 }
787
788 RESERVE_SPACE(4 + create->name->len);
789 WRITE32(create->name->len);
790 WRITEMEM(create->name->name, create->name->len);
791 hdr->nops++;
792
793 encode_attrs(xdr, create->attrs, create->server);
794 }
795
796 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
797 {
798 __be32 *p;
799
800 RESERVE_SPACE(12);
801 WRITE32(OP_GETATTR);
802 WRITE32(1);
803 WRITE32(bitmap);
804 hdr->nops++;
805 }
806
807 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
808 {
809 __be32 *p;
810
811 RESERVE_SPACE(16);
812 WRITE32(OP_GETATTR);
813 WRITE32(2);
814 WRITE32(bm0);
815 WRITE32(bm1);
816 hdr->nops++;
817 }
818
819 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
820 {
821 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
822 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
823 }
824
825 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
826 {
827 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
828 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
829 }
830
831 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
832 {
833 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
834 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
835 }
836
837 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
838 {
839 __be32 *p;
840
841 RESERVE_SPACE(4);
842 WRITE32(OP_GETFH);
843 hdr->nops++;
844 }
845
846 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
847 {
848 __be32 *p;
849
850 RESERVE_SPACE(8 + name->len);
851 WRITE32(OP_LINK);
852 WRITE32(name->len);
853 WRITEMEM(name->name, name->len);
854 hdr->nops++;
855 }
856
857 static inline int nfs4_lock_type(struct file_lock *fl, int block)
858 {
859 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
860 return block ? NFS4_READW_LT : NFS4_READ_LT;
861 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
862 }
863
864 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
865 {
866 if (fl->fl_end == OFFSET_MAX)
867 return ~(uint64_t)0;
868 return fl->fl_end - fl->fl_start + 1;
869 }
870
871 /*
872 * opcode,type,reclaim,offset,length,new_lock_owner = 32
873 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
874 */
875 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
876 {
877 __be32 *p;
878
879 RESERVE_SPACE(32);
880 WRITE32(OP_LOCK);
881 WRITE32(nfs4_lock_type(args->fl, args->block));
882 WRITE32(args->reclaim);
883 WRITE64(args->fl->fl_start);
884 WRITE64(nfs4_lock_length(args->fl));
885 WRITE32(args->new_lock_owner);
886 if (args->new_lock_owner){
887 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
888 WRITE32(args->open_seqid->sequence->counter);
889 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
890 WRITE32(args->lock_seqid->sequence->counter);
891 WRITE64(args->lock_owner.clientid);
892 WRITE32(16);
893 WRITEMEM("lock id:", 8);
894 WRITE64(args->lock_owner.id);
895 }
896 else {
897 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
898 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
899 WRITE32(args->lock_seqid->sequence->counter);
900 }
901 hdr->nops++;
902 }
903
904 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
905 {
906 __be32 *p;
907
908 RESERVE_SPACE(52);
909 WRITE32(OP_LOCKT);
910 WRITE32(nfs4_lock_type(args->fl, 0));
911 WRITE64(args->fl->fl_start);
912 WRITE64(nfs4_lock_length(args->fl));
913 WRITE64(args->lock_owner.clientid);
914 WRITE32(16);
915 WRITEMEM("lock id:", 8);
916 WRITE64(args->lock_owner.id);
917 hdr->nops++;
918 }
919
920 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
921 {
922 __be32 *p;
923
924 RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
925 WRITE32(OP_LOCKU);
926 WRITE32(nfs4_lock_type(args->fl, 0));
927 WRITE32(args->seqid->sequence->counter);
928 WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
929 WRITE64(args->fl->fl_start);
930 WRITE64(nfs4_lock_length(args->fl));
931 hdr->nops++;
932 }
933
934 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
935 {
936 int len = name->len;
937 __be32 *p;
938
939 RESERVE_SPACE(8 + len);
940 WRITE32(OP_LOOKUP);
941 WRITE32(len);
942 WRITEMEM(name->name, len);
943 hdr->nops++;
944 }
945
946 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
947 {
948 __be32 *p;
949
950 RESERVE_SPACE(8);
951 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
952 case FMODE_READ:
953 WRITE32(NFS4_SHARE_ACCESS_READ);
954 break;
955 case FMODE_WRITE:
956 WRITE32(NFS4_SHARE_ACCESS_WRITE);
957 break;
958 case FMODE_READ|FMODE_WRITE:
959 WRITE32(NFS4_SHARE_ACCESS_BOTH);
960 break;
961 default:
962 WRITE32(0);
963 }
964 WRITE32(0); /* for linux, share_deny = 0 always */
965 }
966
967 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
968 {
969 __be32 *p;
970 /*
971 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
972 * owner 4 = 32
973 */
974 RESERVE_SPACE(8);
975 WRITE32(OP_OPEN);
976 WRITE32(arg->seqid->sequence->counter);
977 encode_share_access(xdr, arg->fmode);
978 RESERVE_SPACE(28);
979 WRITE64(arg->clientid);
980 WRITE32(16);
981 WRITEMEM("open id:", 8);
982 WRITE64(arg->id);
983 }
984
985 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
986 {
987 __be32 *p;
988
989 RESERVE_SPACE(4);
990 switch(arg->open_flags & O_EXCL) {
991 case 0:
992 WRITE32(NFS4_CREATE_UNCHECKED);
993 encode_attrs(xdr, arg->u.attrs, arg->server);
994 break;
995 default:
996 WRITE32(NFS4_CREATE_EXCLUSIVE);
997 encode_nfs4_verifier(xdr, &arg->u.verifier);
998 }
999 }
1000
1001 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1002 {
1003 __be32 *p;
1004
1005 RESERVE_SPACE(4);
1006 switch (arg->open_flags & O_CREAT) {
1007 case 0:
1008 WRITE32(NFS4_OPEN_NOCREATE);
1009 break;
1010 default:
1011 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1012 WRITE32(NFS4_OPEN_CREATE);
1013 encode_createmode(xdr, arg);
1014 }
1015 }
1016
1017 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1018 {
1019 __be32 *p;
1020
1021 RESERVE_SPACE(4);
1022 switch (delegation_type) {
1023 case 0:
1024 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1025 break;
1026 case FMODE_READ:
1027 WRITE32(NFS4_OPEN_DELEGATE_READ);
1028 break;
1029 case FMODE_WRITE|FMODE_READ:
1030 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1031 break;
1032 default:
1033 BUG();
1034 }
1035 }
1036
1037 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1038 {
1039 __be32 *p;
1040
1041 RESERVE_SPACE(4);
1042 WRITE32(NFS4_OPEN_CLAIM_NULL);
1043 encode_string(xdr, name->len, name->name);
1044 }
1045
1046 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1047 {
1048 __be32 *p;
1049
1050 RESERVE_SPACE(4);
1051 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1052 encode_delegation_type(xdr, type);
1053 }
1054
1055 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1056 {
1057 __be32 *p;
1058
1059 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1060 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1061 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1062 encode_string(xdr, name->len, name->name);
1063 }
1064
1065 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1066 {
1067 encode_openhdr(xdr, arg);
1068 encode_opentype(xdr, arg);
1069 switch (arg->claim) {
1070 case NFS4_OPEN_CLAIM_NULL:
1071 encode_claim_null(xdr, arg->name);
1072 break;
1073 case NFS4_OPEN_CLAIM_PREVIOUS:
1074 encode_claim_previous(xdr, arg->u.delegation_type);
1075 break;
1076 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1077 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1078 break;
1079 default:
1080 BUG();
1081 }
1082 hdr->nops++;
1083 }
1084
1085 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1086 {
1087 __be32 *p;
1088
1089 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1090 WRITE32(OP_OPEN_CONFIRM);
1091 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1092 WRITE32(arg->seqid->sequence->counter);
1093 hdr->nops++;
1094 }
1095
1096 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1097 {
1098 __be32 *p;
1099
1100 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1101 WRITE32(OP_OPEN_DOWNGRADE);
1102 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1103 WRITE32(arg->seqid->sequence->counter);
1104 encode_share_access(xdr, arg->fmode);
1105 hdr->nops++;
1106 }
1107
1108 static void
1109 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1110 {
1111 int len = fh->size;
1112 __be32 *p;
1113
1114 RESERVE_SPACE(8 + len);
1115 WRITE32(OP_PUTFH);
1116 WRITE32(len);
1117 WRITEMEM(fh->data, len);
1118 hdr->nops++;
1119 }
1120
1121 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1122 {
1123 __be32 *p;
1124
1125 RESERVE_SPACE(4);
1126 WRITE32(OP_PUTROOTFH);
1127 hdr->nops++;
1128 }
1129
1130 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1131 {
1132 nfs4_stateid stateid;
1133 __be32 *p;
1134
1135 RESERVE_SPACE(NFS4_STATEID_SIZE);
1136 if (ctx->state != NULL) {
1137 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1138 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1139 } else
1140 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1141 }
1142
1143 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1144 {
1145 __be32 *p;
1146
1147 RESERVE_SPACE(4);
1148 WRITE32(OP_READ);
1149
1150 encode_stateid(xdr, args->context);
1151
1152 RESERVE_SPACE(12);
1153 WRITE64(args->offset);
1154 WRITE32(args->count);
1155 hdr->nops++;
1156 }
1157
1158 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1159 {
1160 uint32_t attrs[2] = {
1161 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1162 FATTR4_WORD1_MOUNTED_ON_FILEID,
1163 };
1164 __be32 *p;
1165
1166 RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1167 WRITE32(OP_READDIR);
1168 WRITE64(readdir->cookie);
1169 WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1170 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1171 WRITE32(readdir->count);
1172 WRITE32(2);
1173 /* Switch to mounted_on_fileid if the server supports it */
1174 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1175 attrs[0] &= ~FATTR4_WORD0_FILEID;
1176 else
1177 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1178 WRITE32(attrs[0] & readdir->bitmask[0]);
1179 WRITE32(attrs[1] & readdir->bitmask[1]);
1180 hdr->nops++;
1181 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1182 __func__,
1183 (unsigned long long)readdir->cookie,
1184 ((u32 *)readdir->verifier.data)[0],
1185 ((u32 *)readdir->verifier.data)[1],
1186 attrs[0] & readdir->bitmask[0],
1187 attrs[1] & readdir->bitmask[1]);
1188 }
1189
1190 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1191 {
1192 __be32 *p;
1193
1194 RESERVE_SPACE(4);
1195 WRITE32(OP_READLINK);
1196 hdr->nops++;
1197 }
1198
1199 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1200 {
1201 __be32 *p;
1202
1203 RESERVE_SPACE(8 + name->len);
1204 WRITE32(OP_REMOVE);
1205 WRITE32(name->len);
1206 WRITEMEM(name->name, name->len);
1207 hdr->nops++;
1208 }
1209
1210 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1211 {
1212 __be32 *p;
1213
1214 RESERVE_SPACE(8 + oldname->len);
1215 WRITE32(OP_RENAME);
1216 WRITE32(oldname->len);
1217 WRITEMEM(oldname->name, oldname->len);
1218
1219 RESERVE_SPACE(4 + newname->len);
1220 WRITE32(newname->len);
1221 WRITEMEM(newname->name, newname->len);
1222 hdr->nops++;
1223 }
1224
1225 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1226 {
1227 __be32 *p;
1228
1229 RESERVE_SPACE(12);
1230 WRITE32(OP_RENEW);
1231 WRITE64(client_stateid->cl_clientid);
1232 hdr->nops++;
1233 }
1234
1235 static void
1236 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1237 {
1238 __be32 *p;
1239
1240 RESERVE_SPACE(4);
1241 WRITE32(OP_RESTOREFH);
1242 hdr->nops++;
1243 }
1244
1245 static int
1246 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1247 {
1248 __be32 *p;
1249
1250 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1251 WRITE32(OP_SETATTR);
1252 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1253 RESERVE_SPACE(2*4);
1254 WRITE32(1);
1255 WRITE32(FATTR4_WORD0_ACL);
1256 if (arg->acl_len % 4)
1257 return -EINVAL;
1258 RESERVE_SPACE(4);
1259 WRITE32(arg->acl_len);
1260 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1261 hdr->nops++;
1262 return 0;
1263 }
1264
1265 static void
1266 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1267 {
1268 __be32 *p;
1269
1270 RESERVE_SPACE(4);
1271 WRITE32(OP_SAVEFH);
1272 hdr->nops++;
1273 }
1274
1275 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1276 {
1277 __be32 *p;
1278
1279 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1280 WRITE32(OP_SETATTR);
1281 WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1282 hdr->nops++;
1283 encode_attrs(xdr, arg->iap, server);
1284 }
1285
1286 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1287 {
1288 __be32 *p;
1289
1290 RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1291 WRITE32(OP_SETCLIENTID);
1292 WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1293
1294 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1295 RESERVE_SPACE(4);
1296 WRITE32(setclientid->sc_prog);
1297 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1298 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1299 RESERVE_SPACE(4);
1300 WRITE32(setclientid->sc_cb_ident);
1301 hdr->nops++;
1302 }
1303
1304 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1305 {
1306 __be32 *p;
1307
1308 RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1309 WRITE32(OP_SETCLIENTID_CONFIRM);
1310 WRITE64(client_state->cl_clientid);
1311 WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1312 hdr->nops++;
1313 }
1314
1315 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1316 {
1317 __be32 *p;
1318
1319 RESERVE_SPACE(4);
1320 WRITE32(OP_WRITE);
1321
1322 encode_stateid(xdr, args->context);
1323
1324 RESERVE_SPACE(16);
1325 WRITE64(args->offset);
1326 WRITE32(args->stable);
1327 WRITE32(args->count);
1328
1329 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1330 hdr->nops++;
1331 }
1332
1333 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1334 {
1335 __be32 *p;
1336
1337 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1338
1339 WRITE32(OP_DELEGRETURN);
1340 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1341 hdr->nops++;
1342 }
1343 /*
1344 * END OF "GENERIC" ENCODE ROUTINES.
1345 */
1346
1347 /*
1348 * Encode an ACCESS request
1349 */
1350 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1351 {
1352 struct xdr_stream xdr;
1353 struct compound_hdr hdr = {
1354 .nops = 0,
1355 };
1356
1357 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1358 encode_compound_hdr(&xdr, &hdr);
1359 encode_putfh(&xdr, args->fh, &hdr);
1360 encode_access(&xdr, args->access, &hdr);
1361 encode_getfattr(&xdr, args->bitmask, &hdr);
1362 encode_nops(&hdr);
1363 return 0;
1364 }
1365
1366 /*
1367 * Encode LOOKUP request
1368 */
1369 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1370 {
1371 struct xdr_stream xdr;
1372 struct compound_hdr hdr = {
1373 .nops = 0,
1374 };
1375
1376 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1377 encode_compound_hdr(&xdr, &hdr);
1378 encode_putfh(&xdr, args->dir_fh, &hdr);
1379 encode_lookup(&xdr, args->name, &hdr);
1380 encode_getfh(&xdr, &hdr);
1381 encode_getfattr(&xdr, args->bitmask, &hdr);
1382 encode_nops(&hdr);
1383 return 0;
1384 }
1385
1386 /*
1387 * Encode LOOKUP_ROOT request
1388 */
1389 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1390 {
1391 struct xdr_stream xdr;
1392 struct compound_hdr hdr = {
1393 .nops = 0,
1394 };
1395
1396 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1397 encode_compound_hdr(&xdr, &hdr);
1398 encode_putrootfh(&xdr, &hdr);
1399 encode_getfh(&xdr, &hdr);
1400 encode_getfattr(&xdr, args->bitmask, &hdr);
1401 encode_nops(&hdr);
1402 return 0;
1403 }
1404
1405 /*
1406 * Encode REMOVE request
1407 */
1408 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1409 {
1410 struct xdr_stream xdr;
1411 struct compound_hdr hdr = {
1412 .nops = 0,
1413 };
1414
1415 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1416 encode_compound_hdr(&xdr, &hdr);
1417 encode_putfh(&xdr, args->fh, &hdr);
1418 encode_remove(&xdr, &args->name, &hdr);
1419 encode_getfattr(&xdr, args->bitmask, &hdr);
1420 encode_nops(&hdr);
1421 return 0;
1422 }
1423
1424 /*
1425 * Encode RENAME request
1426 */
1427 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1428 {
1429 struct xdr_stream xdr;
1430 struct compound_hdr hdr = {
1431 .nops = 0,
1432 };
1433
1434 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435 encode_compound_hdr(&xdr, &hdr);
1436 encode_putfh(&xdr, args->old_dir, &hdr);
1437 encode_savefh(&xdr, &hdr);
1438 encode_putfh(&xdr, args->new_dir, &hdr);
1439 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1440 encode_getfattr(&xdr, args->bitmask, &hdr);
1441 encode_restorefh(&xdr, &hdr);
1442 encode_getfattr(&xdr, args->bitmask, &hdr);
1443 encode_nops(&hdr);
1444 return 0;
1445 }
1446
1447 /*
1448 * Encode LINK request
1449 */
1450 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1451 {
1452 struct xdr_stream xdr;
1453 struct compound_hdr hdr = {
1454 .nops = 0,
1455 };
1456
1457 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1458 encode_compound_hdr(&xdr, &hdr);
1459 encode_putfh(&xdr, args->fh, &hdr);
1460 encode_savefh(&xdr, &hdr);
1461 encode_putfh(&xdr, args->dir_fh, &hdr);
1462 encode_link(&xdr, args->name, &hdr);
1463 encode_getfattr(&xdr, args->bitmask, &hdr);
1464 encode_restorefh(&xdr, &hdr);
1465 encode_getfattr(&xdr, args->bitmask, &hdr);
1466 encode_nops(&hdr);
1467 return 0;
1468 }
1469
1470 /*
1471 * Encode CREATE request
1472 */
1473 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1474 {
1475 struct xdr_stream xdr;
1476 struct compound_hdr hdr = {
1477 .nops = 0,
1478 };
1479
1480 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1481 encode_compound_hdr(&xdr, &hdr);
1482 encode_putfh(&xdr, args->dir_fh, &hdr);
1483 encode_savefh(&xdr, &hdr);
1484 encode_create(&xdr, args, &hdr);
1485 encode_getfh(&xdr, &hdr);
1486 encode_getfattr(&xdr, args->bitmask, &hdr);
1487 encode_restorefh(&xdr, &hdr);
1488 encode_getfattr(&xdr, args->bitmask, &hdr);
1489 encode_nops(&hdr);
1490 return 0;
1491 }
1492
1493 /*
1494 * Encode SYMLINK request
1495 */
1496 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1497 {
1498 return nfs4_xdr_enc_create(req, p, args);
1499 }
1500
1501 /*
1502 * Encode GETATTR request
1503 */
1504 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1505 {
1506 struct xdr_stream xdr;
1507 struct compound_hdr hdr = {
1508 .nops = 0,
1509 };
1510
1511 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1512 encode_compound_hdr(&xdr, &hdr);
1513 encode_putfh(&xdr, args->fh, &hdr);
1514 encode_getfattr(&xdr, args->bitmask, &hdr);
1515 encode_nops(&hdr);
1516 return 0;
1517 }
1518
1519 /*
1520 * Encode a CLOSE request
1521 */
1522 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1523 {
1524 struct xdr_stream xdr;
1525 struct compound_hdr hdr = {
1526 .nops = 0,
1527 };
1528
1529 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1530 encode_compound_hdr(&xdr, &hdr);
1531 encode_putfh(&xdr, args->fh, &hdr);
1532 encode_close(&xdr, args, &hdr);
1533 encode_getfattr(&xdr, args->bitmask, &hdr);
1534 encode_nops(&hdr);
1535 return 0;
1536 }
1537
1538 /*
1539 * Encode an OPEN request
1540 */
1541 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1542 {
1543 struct xdr_stream xdr;
1544 struct compound_hdr hdr = {
1545 .nops = 0,
1546 };
1547
1548 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1549 encode_compound_hdr(&xdr, &hdr);
1550 encode_putfh(&xdr, args->fh, &hdr);
1551 encode_savefh(&xdr, &hdr);
1552 encode_open(&xdr, args, &hdr);
1553 encode_getfh(&xdr, &hdr);
1554 encode_getfattr(&xdr, args->bitmask, &hdr);
1555 encode_restorefh(&xdr, &hdr);
1556 encode_getfattr(&xdr, args->bitmask, &hdr);
1557 encode_nops(&hdr);
1558 return 0;
1559 }
1560
1561 /*
1562 * Encode an OPEN_CONFIRM request
1563 */
1564 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1565 {
1566 struct xdr_stream xdr;
1567 struct compound_hdr hdr = {
1568 .nops = 0,
1569 };
1570
1571 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1572 encode_compound_hdr(&xdr, &hdr);
1573 encode_putfh(&xdr, args->fh, &hdr);
1574 encode_open_confirm(&xdr, args, &hdr);
1575 encode_nops(&hdr);
1576 return 0;
1577 }
1578
1579 /*
1580 * Encode an OPEN request with no attributes.
1581 */
1582 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1583 {
1584 struct xdr_stream xdr;
1585 struct compound_hdr hdr = {
1586 .nops = 0,
1587 };
1588
1589 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1590 encode_compound_hdr(&xdr, &hdr);
1591 encode_putfh(&xdr, args->fh, &hdr);
1592 encode_open(&xdr, args, &hdr);
1593 encode_getfattr(&xdr, args->bitmask, &hdr);
1594 encode_nops(&hdr);
1595 return 0;
1596 }
1597
1598 /*
1599 * Encode an OPEN_DOWNGRADE request
1600 */
1601 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1602 {
1603 struct xdr_stream xdr;
1604 struct compound_hdr hdr = {
1605 .nops = 0,
1606 };
1607
1608 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1609 encode_compound_hdr(&xdr, &hdr);
1610 encode_putfh(&xdr, args->fh, &hdr);
1611 encode_open_downgrade(&xdr, args, &hdr);
1612 encode_getfattr(&xdr, args->bitmask, &hdr);
1613 encode_nops(&hdr);
1614 return 0;
1615 }
1616
1617 /*
1618 * Encode a LOCK request
1619 */
1620 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1621 {
1622 struct xdr_stream xdr;
1623 struct compound_hdr hdr = {
1624 .nops = 0,
1625 };
1626
1627 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1628 encode_compound_hdr(&xdr, &hdr);
1629 encode_putfh(&xdr, args->fh, &hdr);
1630 encode_lock(&xdr, args, &hdr);
1631 encode_nops(&hdr);
1632 return 0;
1633 }
1634
1635 /*
1636 * Encode a LOCKT request
1637 */
1638 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1639 {
1640 struct xdr_stream xdr;
1641 struct compound_hdr hdr = {
1642 .nops = 0,
1643 };
1644
1645 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1646 encode_compound_hdr(&xdr, &hdr);
1647 encode_putfh(&xdr, args->fh, &hdr);
1648 encode_lockt(&xdr, args, &hdr);
1649 encode_nops(&hdr);
1650 return 0;
1651 }
1652
1653 /*
1654 * Encode a LOCKU request
1655 */
1656 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1657 {
1658 struct xdr_stream xdr;
1659 struct compound_hdr hdr = {
1660 .nops = 0,
1661 };
1662
1663 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664 encode_compound_hdr(&xdr, &hdr);
1665 encode_putfh(&xdr, args->fh, &hdr);
1666 encode_locku(&xdr, args, &hdr);
1667 encode_nops(&hdr);
1668 return 0;
1669 }
1670
1671 /*
1672 * Encode a READLINK request
1673 */
1674 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1675 {
1676 struct xdr_stream xdr;
1677 struct compound_hdr hdr = {
1678 .nops = 0,
1679 };
1680 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1681 unsigned int replen;
1682
1683 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684 encode_compound_hdr(&xdr, &hdr);
1685 encode_putfh(&xdr, args->fh, &hdr);
1686 encode_readlink(&xdr, args, req, &hdr);
1687
1688 /* set up reply kvec
1689 * toplevel_status + taglen + rescount + OP_PUTFH + status
1690 * + OP_READLINK + status + string length = 8
1691 */
1692 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1693 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1694 args->pgbase, args->pglen);
1695 encode_nops(&hdr);
1696 return 0;
1697 }
1698
1699 /*
1700 * Encode a READDIR request
1701 */
1702 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1703 {
1704 struct xdr_stream xdr;
1705 struct compound_hdr hdr = {
1706 .nops = 0,
1707 };
1708 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1709 int replen;
1710
1711 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1712 encode_compound_hdr(&xdr, &hdr);
1713 encode_putfh(&xdr, args->fh, &hdr);
1714 encode_readdir(&xdr, args, req, &hdr);
1715
1716 /* set up reply kvec
1717 * toplevel_status + taglen + rescount + OP_PUTFH + status
1718 * + OP_READDIR + status + verifer(2) = 9
1719 */
1720 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1721 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1722 args->pgbase, args->count);
1723 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1724 __func__, replen, args->pages,
1725 args->pgbase, args->count);
1726 encode_nops(&hdr);
1727 return 0;
1728 }
1729
1730 /*
1731 * Encode a READ request
1732 */
1733 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1734 {
1735 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1736 struct xdr_stream xdr;
1737 struct compound_hdr hdr = {
1738 .nops = 0,
1739 };
1740 int replen;
1741
1742 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743 encode_compound_hdr(&xdr, &hdr);
1744 encode_putfh(&xdr, args->fh, &hdr);
1745 encode_read(&xdr, args, &hdr);
1746
1747 /* set up reply kvec
1748 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1749 * + OP_READ + status + eof + datalen = 9
1750 */
1751 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1752 xdr_inline_pages(&req->rq_rcv_buf, replen,
1753 args->pages, args->pgbase, args->count);
1754 req->rq_rcv_buf.flags |= XDRBUF_READ;
1755 encode_nops(&hdr);
1756 return 0;
1757 }
1758
1759 /*
1760 * Encode an SETATTR request
1761 */
1762 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1763 {
1764 struct xdr_stream xdr;
1765 struct compound_hdr hdr = {
1766 .nops = 0,
1767 };
1768
1769 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770 encode_compound_hdr(&xdr, &hdr);
1771 encode_putfh(&xdr, args->fh, &hdr);
1772 encode_setattr(&xdr, args, args->server, &hdr);
1773 encode_getfattr(&xdr, args->bitmask, &hdr);
1774 encode_nops(&hdr);
1775 return 0;
1776 }
1777
1778 /*
1779 * Encode a GETACL request
1780 */
1781 static int
1782 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1783 struct nfs_getaclargs *args)
1784 {
1785 struct xdr_stream xdr;
1786 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1787 struct compound_hdr hdr = {
1788 .nops = 0,
1789 };
1790 int replen;
1791
1792 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793 encode_compound_hdr(&xdr, &hdr);
1794 encode_putfh(&xdr, args->fh, &hdr);
1795 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1796
1797 /* set up reply buffer: */
1798 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1799 xdr_inline_pages(&req->rq_rcv_buf, replen,
1800 args->acl_pages, args->acl_pgbase, args->acl_len);
1801 encode_nops(&hdr);
1802 return 0;
1803 }
1804
1805 /*
1806 * Encode a WRITE request
1807 */
1808 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1809 {
1810 struct xdr_stream xdr;
1811 struct compound_hdr hdr = {
1812 .nops = 0,
1813 };
1814
1815 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1816 encode_compound_hdr(&xdr, &hdr);
1817 encode_putfh(&xdr, args->fh, &hdr);
1818 encode_write(&xdr, args, &hdr);
1819 req->rq_snd_buf.flags |= XDRBUF_WRITE;
1820 encode_getfattr(&xdr, args->bitmask, &hdr);
1821 encode_nops(&hdr);
1822 return 0;
1823 }
1824
1825 /*
1826 * a COMMIT request
1827 */
1828 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1829 {
1830 struct xdr_stream xdr;
1831 struct compound_hdr hdr = {
1832 .nops = 0,
1833 };
1834
1835 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1836 encode_compound_hdr(&xdr, &hdr);
1837 encode_putfh(&xdr, args->fh, &hdr);
1838 encode_commit(&xdr, args, &hdr);
1839 encode_getfattr(&xdr, args->bitmask, &hdr);
1840 encode_nops(&hdr);
1841 return 0;
1842 }
1843
1844 /*
1845 * FSINFO request
1846 */
1847 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1848 {
1849 struct xdr_stream xdr;
1850 struct compound_hdr hdr = {
1851 .nops = 0,
1852 };
1853
1854 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1855 encode_compound_hdr(&xdr, &hdr);
1856 encode_putfh(&xdr, args->fh, &hdr);
1857 encode_fsinfo(&xdr, args->bitmask, &hdr);
1858 encode_nops(&hdr);
1859 return 0;
1860 }
1861
1862 /*
1863 * a PATHCONF request
1864 */
1865 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1866 {
1867 struct xdr_stream xdr;
1868 struct compound_hdr hdr = {
1869 .nops = 0,
1870 };
1871
1872 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1873 encode_compound_hdr(&xdr, &hdr);
1874 encode_putfh(&xdr, args->fh, &hdr);
1875 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1876 &hdr);
1877 encode_nops(&hdr);
1878 return 0;
1879 }
1880
1881 /*
1882 * a STATFS request
1883 */
1884 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1885 {
1886 struct xdr_stream xdr;
1887 struct compound_hdr hdr = {
1888 .nops = 0,
1889 };
1890
1891 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1892 encode_compound_hdr(&xdr, &hdr);
1893 encode_putfh(&xdr, args->fh, &hdr);
1894 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1895 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1896 encode_nops(&hdr);
1897 return 0;
1898 }
1899
1900 /*
1901 * GETATTR_BITMAP request
1902 */
1903 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1904 {
1905 struct xdr_stream xdr;
1906 struct compound_hdr hdr = {
1907 .nops = 0,
1908 };
1909
1910 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911 encode_compound_hdr(&xdr, &hdr);
1912 encode_putfh(&xdr, fhandle, &hdr);
1913 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1914 FATTR4_WORD0_LINK_SUPPORT|
1915 FATTR4_WORD0_SYMLINK_SUPPORT|
1916 FATTR4_WORD0_ACLSUPPORT, &hdr);
1917 encode_nops(&hdr);
1918 return 0;
1919 }
1920
1921 /*
1922 * a RENEW request
1923 */
1924 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1925 {
1926 struct xdr_stream xdr;
1927 struct compound_hdr hdr = {
1928 .nops = 0,
1929 };
1930
1931 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1932 encode_compound_hdr(&xdr, &hdr);
1933 encode_renew(&xdr, clp, &hdr);
1934 encode_nops(&hdr);
1935 return 0;
1936 }
1937
1938 /*
1939 * a SETCLIENTID request
1940 */
1941 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1942 {
1943 struct xdr_stream xdr;
1944 struct compound_hdr hdr = {
1945 .nops = 0,
1946 };
1947
1948 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949 encode_compound_hdr(&xdr, &hdr);
1950 encode_setclientid(&xdr, sc, &hdr);
1951 encode_nops(&hdr);
1952 return 0;
1953 }
1954
1955 /*
1956 * a SETCLIENTID_CONFIRM request
1957 */
1958 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1959 {
1960 struct xdr_stream xdr;
1961 struct compound_hdr hdr = {
1962 .nops = 0,
1963 };
1964 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1965
1966 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1967 encode_compound_hdr(&xdr, &hdr);
1968 encode_setclientid_confirm(&xdr, clp, &hdr);
1969 encode_putrootfh(&xdr, &hdr);
1970 encode_fsinfo(&xdr, lease_bitmap, &hdr);
1971 encode_nops(&hdr);
1972 return 0;
1973 }
1974
1975 /*
1976 * DELEGRETURN request
1977 */
1978 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1979 {
1980 struct xdr_stream xdr;
1981 struct compound_hdr hdr = {
1982 .nops = 0,
1983 };
1984
1985 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1986 encode_compound_hdr(&xdr, &hdr);
1987 encode_putfh(&xdr, args->fhandle, &hdr);
1988 encode_delegreturn(&xdr, args->stateid, &hdr);
1989 encode_getfattr(&xdr, args->bitmask, &hdr);
1990 encode_nops(&hdr);
1991 return 0;
1992 }
1993
1994 /*
1995 * Encode FS_LOCATIONS request
1996 */
1997 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
1998 {
1999 struct xdr_stream xdr;
2000 struct compound_hdr hdr = {
2001 .nops = 0,
2002 };
2003 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2004 int replen;
2005
2006 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007 encode_compound_hdr(&xdr, &hdr);
2008 encode_putfh(&xdr, args->dir_fh, &hdr);
2009 encode_lookup(&xdr, args->name, &hdr);
2010 encode_fs_locations(&xdr, args->bitmask, &hdr);
2011
2012 /* set up reply
2013 * toplevel_status + OP_PUTFH + status
2014 * + OP_LOOKUP + status + OP_GETATTR + status = 7
2015 */
2016 replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2017 xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2018 0, PAGE_SIZE);
2019 encode_nops(&hdr);
2020 return 0;
2021 }
2022
2023 /*
2024 * START OF "GENERIC" DECODE ROUTINES.
2025 * These may look a little ugly since they are imported from a "generic"
2026 * set of XDR encode/decode routines which are intended to be shared by
2027 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2028 *
2029 * If the pain of reading these is too great, it should be a straightforward
2030 * task to translate them into Linux-specific versions which are more
2031 * consistent with the style used in NFSv2/v3...
2032 */
2033 #define READ32(x) (x) = ntohl(*p++)
2034 #define READ64(x) do { \
2035 (x) = (u64)ntohl(*p++) << 32; \
2036 (x) |= ntohl(*p++); \
2037 } while (0)
2038 #define READTIME(x) do { \
2039 p++; \
2040 (x.tv_sec) = ntohl(*p++); \
2041 (x.tv_nsec) = ntohl(*p++); \
2042 } while (0)
2043 #define COPYMEM(x,nbytes) do { \
2044 memcpy((x), p, nbytes); \
2045 p += XDR_QUADLEN(nbytes); \
2046 } while (0)
2047
2048 #define READ_BUF(nbytes) do { \
2049 p = xdr_inline_decode(xdr, nbytes); \
2050 if (unlikely(!p)) { \
2051 dprintk("nfs: %s: prematurely hit end of receive" \
2052 " buffer\n", __func__); \
2053 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2054 __func__, xdr->p, nbytes, xdr->end); \
2055 return -EIO; \
2056 } \
2057 } while (0)
2058
2059 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2060 {
2061 __be32 *p;
2062
2063 READ_BUF(4);
2064 READ32(*len);
2065 READ_BUF(*len);
2066 *string = (char *)p;
2067 return 0;
2068 }
2069
2070 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2071 {
2072 __be32 *p;
2073
2074 READ_BUF(8);
2075 READ32(hdr->status);
2076 READ32(hdr->taglen);
2077
2078 READ_BUF(hdr->taglen + 4);
2079 hdr->tag = (char *)p;
2080 p += XDR_QUADLEN(hdr->taglen);
2081 READ32(hdr->nops);
2082 if (unlikely(hdr->nops < 1))
2083 return nfs4_stat_to_errno(hdr->status);
2084 return 0;
2085 }
2086
2087 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2088 {
2089 __be32 *p;
2090 uint32_t opnum;
2091 int32_t nfserr;
2092
2093 READ_BUF(8);
2094 READ32(opnum);
2095 if (opnum != expected) {
2096 dprintk("nfs: Server returned operation"
2097 " %d but we issued a request for %d\n",
2098 opnum, expected);
2099 return -EIO;
2100 }
2101 READ32(nfserr);
2102 if (nfserr != NFS_OK)
2103 return nfs4_stat_to_errno(nfserr);
2104 return 0;
2105 }
2106
2107 /* Dummy routine */
2108 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2109 {
2110 __be32 *p;
2111 unsigned int strlen;
2112 char *str;
2113
2114 READ_BUF(12);
2115 return decode_opaque_inline(xdr, &strlen, &str);
2116 }
2117
2118 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2119 {
2120 uint32_t bmlen;
2121 __be32 *p;
2122
2123 READ_BUF(4);
2124 READ32(bmlen);
2125
2126 bitmap[0] = bitmap[1] = 0;
2127 READ_BUF((bmlen << 2));
2128 if (bmlen > 0) {
2129 READ32(bitmap[0]);
2130 if (bmlen > 1)
2131 READ32(bitmap[1]);
2132 }
2133 return 0;
2134 }
2135
2136 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2137 {
2138 __be32 *p;
2139
2140 READ_BUF(4);
2141 READ32(*attrlen);
2142 *savep = xdr->p;
2143 return 0;
2144 }
2145
2146 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2147 {
2148 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2149 decode_attr_bitmap(xdr, bitmask);
2150 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2151 } else
2152 bitmask[0] = bitmask[1] = 0;
2153 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2154 return 0;
2155 }
2156
2157 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2158 {
2159 __be32 *p;
2160 int ret = 0;
2161
2162 *type = 0;
2163 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2164 return -EIO;
2165 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2166 READ_BUF(4);
2167 READ32(*type);
2168 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2169 dprintk("%s: bad type %d\n", __func__, *type);
2170 return -EIO;
2171 }
2172 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2173 ret = NFS_ATTR_FATTR_TYPE;
2174 }
2175 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2176 return ret;
2177 }
2178
2179 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2180 {
2181 __be32 *p;
2182 int ret = 0;
2183
2184 *change = 0;
2185 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2186 return -EIO;
2187 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2188 READ_BUF(8);
2189 READ64(*change);
2190 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2191 ret = NFS_ATTR_FATTR_CHANGE;
2192 }
2193 dprintk("%s: change attribute=%Lu\n", __func__,
2194 (unsigned long long)*change);
2195 return ret;
2196 }
2197
2198 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2199 {
2200 __be32 *p;
2201 int ret = 0;
2202
2203 *size = 0;
2204 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2205 return -EIO;
2206 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2207 READ_BUF(8);
2208 READ64(*size);
2209 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2210 ret = NFS_ATTR_FATTR_SIZE;
2211 }
2212 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2213 return ret;
2214 }
2215
2216 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2217 {
2218 __be32 *p;
2219
2220 *res = 0;
2221 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2222 return -EIO;
2223 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2224 READ_BUF(4);
2225 READ32(*res);
2226 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2227 }
2228 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2229 return 0;
2230 }
2231
2232 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2233 {
2234 __be32 *p;
2235
2236 *res = 0;
2237 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2238 return -EIO;
2239 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2240 READ_BUF(4);
2241 READ32(*res);
2242 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2243 }
2244 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2245 return 0;
2246 }
2247
2248 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2249 {
2250 __be32 *p;
2251 int ret = 0;
2252
2253 fsid->major = 0;
2254 fsid->minor = 0;
2255 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2256 return -EIO;
2257 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2258 READ_BUF(16);
2259 READ64(fsid->major);
2260 READ64(fsid->minor);
2261 bitmap[0] &= ~FATTR4_WORD0_FSID;
2262 ret = NFS_ATTR_FATTR_FSID;
2263 }
2264 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2265 (unsigned long long)fsid->major,
2266 (unsigned long long)fsid->minor);
2267 return ret;
2268 }
2269
2270 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2271 {
2272 __be32 *p;
2273
2274 *res = 60;
2275 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2276 return -EIO;
2277 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2278 READ_BUF(4);
2279 READ32(*res);
2280 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2281 }
2282 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2283 return 0;
2284 }
2285
2286 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2287 {
2288 __be32 *p;
2289
2290 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2291 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2292 return -EIO;
2293 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2294 READ_BUF(4);
2295 READ32(*res);
2296 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2297 }
2298 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2299 return 0;
2300 }
2301
2302 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2303 {
2304 __be32 *p;
2305 int ret = 0;
2306
2307 *fileid = 0;
2308 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2309 return -EIO;
2310 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2311 READ_BUF(8);
2312 READ64(*fileid);
2313 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2314 ret = NFS_ATTR_FATTR_FILEID;
2315 }
2316 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2317 return ret;
2318 }
2319
2320 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2321 {
2322 __be32 *p;
2323 int ret = 0;
2324
2325 *fileid = 0;
2326 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2327 return -EIO;
2328 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2329 READ_BUF(8);
2330 READ64(*fileid);
2331 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2332 ret = NFS_ATTR_FATTR_FILEID;
2333 }
2334 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2335 return ret;
2336 }
2337
2338 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2339 {
2340 __be32 *p;
2341 int status = 0;
2342
2343 *res = 0;
2344 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2345 return -EIO;
2346 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2347 READ_BUF(8);
2348 READ64(*res);
2349 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2350 }
2351 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2352 return status;
2353 }
2354
2355 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2356 {
2357 __be32 *p;
2358 int status = 0;
2359
2360 *res = 0;
2361 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2362 return -EIO;
2363 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2364 READ_BUF(8);
2365 READ64(*res);
2366 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2367 }
2368 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2369 return status;
2370 }
2371
2372 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2373 {
2374 __be32 *p;
2375 int status = 0;
2376
2377 *res = 0;
2378 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2379 return -EIO;
2380 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2381 READ_BUF(8);
2382 READ64(*res);
2383 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2384 }
2385 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2386 return status;
2387 }
2388
2389 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2390 {
2391 u32 n;
2392 __be32 *p;
2393 int status = 0;
2394
2395 READ_BUF(4);
2396 READ32(n);
2397 if (n == 0)
2398 goto root_path;
2399 dprintk("path ");
2400 path->ncomponents = 0;
2401 while (path->ncomponents < n) {
2402 struct nfs4_string *component = &path->components[path->ncomponents];
2403 status = decode_opaque_inline(xdr, &component->len, &component->data);
2404 if (unlikely(status != 0))
2405 goto out_eio;
2406 if (path->ncomponents != n)
2407 dprintk("/");
2408 dprintk("%s", component->data);
2409 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2410 path->ncomponents++;
2411 else {
2412 dprintk("cannot parse %d components in path\n", n);
2413 goto out_eio;
2414 }
2415 }
2416 out:
2417 dprintk("\n");
2418 return status;
2419 root_path:
2420 /* a root pathname is sent as a zero component4 */
2421 path->ncomponents = 1;
2422 path->components[0].len=0;
2423 path->components[0].data=NULL;
2424 dprintk("path /\n");
2425 goto out;
2426 out_eio:
2427 dprintk(" status %d", status);
2428 status = -EIO;
2429 goto out;
2430 }
2431
2432 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2433 {
2434 int n;
2435 __be32 *p;
2436 int status = -EIO;
2437
2438 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2439 goto out;
2440 status = 0;
2441 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2442 goto out;
2443 dprintk("%s: fsroot ", __func__);
2444 status = decode_pathname(xdr, &res->fs_path);
2445 if (unlikely(status != 0))
2446 goto out;
2447 READ_BUF(4);
2448 READ32(n);
2449 if (n <= 0)
2450 goto out_eio;
2451 res->nlocations = 0;
2452 while (res->nlocations < n) {
2453 u32 m;
2454 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2455
2456 READ_BUF(4);
2457 READ32(m);
2458
2459 loc->nservers = 0;
2460 dprintk("%s: servers ", __func__);
2461 while (loc->nservers < m) {
2462 struct nfs4_string *server = &loc->servers[loc->nservers];
2463 status = decode_opaque_inline(xdr, &server->len, &server->data);
2464 if (unlikely(status != 0))
2465 goto out_eio;
2466 dprintk("%s ", server->data);
2467 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2468 loc->nservers++;
2469 else {
2470 unsigned int i;
2471 dprintk("%s: using first %u of %u servers "
2472 "returned for location %u\n",
2473 __func__,
2474 NFS4_FS_LOCATION_MAXSERVERS,
2475 m, res->nlocations);
2476 for (i = loc->nservers; i < m; i++) {
2477 unsigned int len;
2478 char *data;
2479 status = decode_opaque_inline(xdr, &len, &data);
2480 if (unlikely(status != 0))
2481 goto out_eio;
2482 }
2483 }
2484 }
2485 status = decode_pathname(xdr, &loc->rootpath);
2486 if (unlikely(status != 0))
2487 goto out_eio;
2488 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2489 res->nlocations++;
2490 }
2491 if (res->nlocations != 0)
2492 status = NFS_ATTR_FATTR_V4_REFERRAL;
2493 out:
2494 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2495 return status;
2496 out_eio:
2497 status = -EIO;
2498 goto out;
2499 }
2500
2501 static int decode_attr_maxfilesize(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_MAXFILESIZE - 1U)))
2508 return -EIO;
2509 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2510 READ_BUF(8);
2511 READ64(*res);
2512 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2513 }
2514 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2515 return status;
2516 }
2517
2518 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2519 {
2520 __be32 *p;
2521 int status = 0;
2522
2523 *maxlink = 1;
2524 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2525 return -EIO;
2526 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2527 READ_BUF(4);
2528 READ32(*maxlink);
2529 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2530 }
2531 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2532 return status;
2533 }
2534
2535 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2536 {
2537 __be32 *p;
2538 int status = 0;
2539
2540 *maxname = 1024;
2541 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2542 return -EIO;
2543 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2544 READ_BUF(4);
2545 READ32(*maxname);
2546 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2547 }
2548 dprintk("%s: maxname=%u\n", __func__, *maxname);
2549 return status;
2550 }
2551
2552 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2553 {
2554 __be32 *p;
2555 int status = 0;
2556
2557 *res = 1024;
2558 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2559 return -EIO;
2560 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2561 uint64_t maxread;
2562 READ_BUF(8);
2563 READ64(maxread);
2564 if (maxread > 0x7FFFFFFF)
2565 maxread = 0x7FFFFFFF;
2566 *res = (uint32_t)maxread;
2567 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2568 }
2569 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2570 return status;
2571 }
2572
2573 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2574 {
2575 __be32 *p;
2576 int status = 0;
2577
2578 *res = 1024;
2579 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2580 return -EIO;
2581 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2582 uint64_t maxwrite;
2583 READ_BUF(8);
2584 READ64(maxwrite);
2585 if (maxwrite > 0x7FFFFFFF)
2586 maxwrite = 0x7FFFFFFF;
2587 *res = (uint32_t)maxwrite;
2588 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2589 }
2590 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2591 return status;
2592 }
2593
2594 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2595 {
2596 uint32_t tmp;
2597 __be32 *p;
2598 int ret = 0;
2599
2600 *mode = 0;
2601 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2602 return -EIO;
2603 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2604 READ_BUF(4);
2605 READ32(tmp);
2606 *mode = tmp & ~S_IFMT;
2607 bitmap[1] &= ~FATTR4_WORD1_MODE;
2608 ret = NFS_ATTR_FATTR_MODE;
2609 }
2610 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2611 return ret;
2612 }
2613
2614 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2615 {
2616 __be32 *p;
2617 int ret = 0;
2618
2619 *nlink = 1;
2620 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2621 return -EIO;
2622 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2623 READ_BUF(4);
2624 READ32(*nlink);
2625 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2626 ret = NFS_ATTR_FATTR_NLINK;
2627 }
2628 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2629 return ret;
2630 }
2631
2632 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2633 {
2634 uint32_t len;
2635 __be32 *p;
2636 int ret = 0;
2637
2638 *uid = -2;
2639 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2640 return -EIO;
2641 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2642 READ_BUF(4);
2643 READ32(len);
2644 READ_BUF(len);
2645 if (len < XDR_MAX_NETOBJ) {
2646 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2647 ret = NFS_ATTR_FATTR_OWNER;
2648 else
2649 dprintk("%s: nfs_map_name_to_uid failed!\n",
2650 __func__);
2651 } else
2652 dprintk("%s: name too long (%u)!\n",
2653 __func__, len);
2654 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2655 }
2656 dprintk("%s: uid=%d\n", __func__, (int)*uid);
2657 return ret;
2658 }
2659
2660 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2661 {
2662 uint32_t len;
2663 __be32 *p;
2664 int ret = 0;
2665
2666 *gid = -2;
2667 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2668 return -EIO;
2669 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2670 READ_BUF(4);
2671 READ32(len);
2672 READ_BUF(len);
2673 if (len < XDR_MAX_NETOBJ) {
2674 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2675 ret = NFS_ATTR_FATTR_GROUP;
2676 else
2677 dprintk("%s: nfs_map_group_to_gid failed!\n",
2678 __func__);
2679 } else
2680 dprintk("%s: name too long (%u)!\n",
2681 __func__, len);
2682 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2683 }
2684 dprintk("%s: gid=%d\n", __func__, (int)*gid);
2685 return ret;
2686 }
2687
2688 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2689 {
2690 uint32_t major = 0, minor = 0;
2691 __be32 *p;
2692 int ret = 0;
2693
2694 *rdev = MKDEV(0,0);
2695 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2696 return -EIO;
2697 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2698 dev_t tmp;
2699
2700 READ_BUF(8);
2701 READ32(major);
2702 READ32(minor);
2703 tmp = MKDEV(major, minor);
2704 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2705 *rdev = tmp;
2706 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2707 ret = NFS_ATTR_FATTR_RDEV;
2708 }
2709 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2710 return ret;
2711 }
2712
2713 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2714 {
2715 __be32 *p;
2716 int status = 0;
2717
2718 *res = 0;
2719 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2720 return -EIO;
2721 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2722 READ_BUF(8);
2723 READ64(*res);
2724 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2725 }
2726 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2727 return status;
2728 }
2729
2730 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2731 {
2732 __be32 *p;
2733 int status = 0;
2734
2735 *res = 0;
2736 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2737 return -EIO;
2738 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2739 READ_BUF(8);
2740 READ64(*res);
2741 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2742 }
2743 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2744 return status;
2745 }
2746
2747 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2748 {
2749 __be32 *p;
2750 int status = 0;
2751
2752 *res = 0;
2753 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2754 return -EIO;
2755 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2756 READ_BUF(8);
2757 READ64(*res);
2758 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2759 }
2760 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2761 return status;
2762 }
2763
2764 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2765 {
2766 __be32 *p;
2767 int ret = 0;
2768
2769 *used = 0;
2770 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2771 return -EIO;
2772 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2773 READ_BUF(8);
2774 READ64(*used);
2775 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2776 ret = NFS_ATTR_FATTR_SPACE_USED;
2777 }
2778 dprintk("%s: space used=%Lu\n", __func__,
2779 (unsigned long long)*used);
2780 return ret;
2781 }
2782
2783 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2784 {
2785 __be32 *p;
2786 uint64_t sec;
2787 uint32_t nsec;
2788
2789 READ_BUF(12);
2790 READ64(sec);
2791 READ32(nsec);
2792 time->tv_sec = (time_t)sec;
2793 time->tv_nsec = (long)nsec;
2794 return 0;
2795 }
2796
2797 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2798 {
2799 int status = 0;
2800
2801 time->tv_sec = 0;
2802 time->tv_nsec = 0;
2803 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2804 return -EIO;
2805 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2806 status = decode_attr_time(xdr, time);
2807 if (status == 0)
2808 status = NFS_ATTR_FATTR_ATIME;
2809 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2810 }
2811 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2812 return status;
2813 }
2814
2815 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2816 {
2817 int status = 0;
2818
2819 time->tv_sec = 0;
2820 time->tv_nsec = 0;
2821 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2822 return -EIO;
2823 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2824 status = decode_attr_time(xdr, time);
2825 if (status == 0)
2826 status = NFS_ATTR_FATTR_CTIME;
2827 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2828 }
2829 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2830 return status;
2831 }
2832
2833 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2834 {
2835 int status = 0;
2836
2837 time->tv_sec = 0;
2838 time->tv_nsec = 0;
2839 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2840 return -EIO;
2841 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2842 status = decode_attr_time(xdr, time);
2843 if (status == 0)
2844 status = NFS_ATTR_FATTR_MTIME;
2845 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2846 }
2847 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2848 return status;
2849 }
2850
2851 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2852 {
2853 unsigned int attrwords = XDR_QUADLEN(attrlen);
2854 unsigned int nwords = xdr->p - savep;
2855
2856 if (unlikely(attrwords != nwords)) {
2857 dprintk("%s: server returned incorrect attribute length: "
2858 "%u %c %u\n",
2859 __func__,
2860 attrwords << 2,
2861 (attrwords < nwords) ? '<' : '>',
2862 nwords << 2);
2863 return -EIO;
2864 }
2865 return 0;
2866 }
2867
2868 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2869 {
2870 __be32 *p;
2871
2872 READ_BUF(20);
2873 READ32(cinfo->atomic);
2874 READ64(cinfo->before);
2875 READ64(cinfo->after);
2876 return 0;
2877 }
2878
2879 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2880 {
2881 __be32 *p;
2882 uint32_t supp, acc;
2883 int status;
2884
2885 status = decode_op_hdr(xdr, OP_ACCESS);
2886 if (status)
2887 return status;
2888 READ_BUF(8);
2889 READ32(supp);
2890 READ32(acc);
2891 access->supported = supp;
2892 access->access = acc;
2893 return 0;
2894 }
2895
2896 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2897 {
2898 __be32 *p;
2899 int status;
2900
2901 status = decode_op_hdr(xdr, OP_CLOSE);
2902 if (status != -EIO)
2903 nfs_increment_open_seqid(status, res->seqid);
2904 if (status)
2905 return status;
2906 READ_BUF(NFS4_STATEID_SIZE);
2907 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2908 return 0;
2909 }
2910
2911 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2912 {
2913 __be32 *p;
2914 int status;
2915
2916 status = decode_op_hdr(xdr, OP_COMMIT);
2917 if (status)
2918 return status;
2919 READ_BUF(8);
2920 COPYMEM(res->verf->verifier, 8);
2921 return 0;
2922 }
2923
2924 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2925 {
2926 __be32 *p;
2927 uint32_t bmlen;
2928 int status;
2929
2930 status = decode_op_hdr(xdr, OP_CREATE);
2931 if (status)
2932 return status;
2933 if ((status = decode_change_info(xdr, cinfo)))
2934 return status;
2935 READ_BUF(4);
2936 READ32(bmlen);
2937 READ_BUF(bmlen << 2);
2938 return 0;
2939 }
2940
2941 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2942 {
2943 __be32 *savep;
2944 uint32_t attrlen, bitmap[2] = {0};
2945 int status;
2946
2947 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2948 goto xdr_error;
2949 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2950 goto xdr_error;
2951 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2952 goto xdr_error;
2953 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2954 goto xdr_error;
2955 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2956 goto xdr_error;
2957 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2958 goto xdr_error;
2959 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2960 goto xdr_error;
2961 status = verify_attr_len(xdr, savep, attrlen);
2962 xdr_error:
2963 dprintk("%s: xdr returned %d!\n", __func__, -status);
2964 return status;
2965 }
2966
2967 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2968 {
2969 __be32 *savep;
2970 uint32_t attrlen, bitmap[2] = {0};
2971 int status;
2972
2973 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2974 goto xdr_error;
2975 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2976 goto xdr_error;
2977 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2978 goto xdr_error;
2979
2980 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2981 goto xdr_error;
2982 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2983 goto xdr_error;
2984 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2985 goto xdr_error;
2986 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2987 goto xdr_error;
2988 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2989 goto xdr_error;
2990 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2991 goto xdr_error;
2992
2993 status = verify_attr_len(xdr, savep, attrlen);
2994 xdr_error:
2995 dprintk("%s: xdr returned %d!\n", __func__, -status);
2996 return status;
2997 }
2998
2999 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3000 {
3001 __be32 *savep;
3002 uint32_t attrlen, bitmap[2] = {0};
3003 int status;
3004
3005 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3006 goto xdr_error;
3007 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3008 goto xdr_error;
3009 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3010 goto xdr_error;
3011
3012 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3013 goto xdr_error;
3014 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3015 goto xdr_error;
3016
3017 status = verify_attr_len(xdr, savep, attrlen);
3018 xdr_error:
3019 dprintk("%s: xdr returned %d!\n", __func__, -status);
3020 return status;
3021 }
3022
3023 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3024 {
3025 __be32 *savep;
3026 uint32_t attrlen,
3027 bitmap[2] = {0},
3028 type;
3029 int status;
3030 umode_t fmode = 0;
3031 uint64_t fileid;
3032
3033 status = decode_op_hdr(xdr, OP_GETATTR);
3034 if (status < 0)
3035 goto xdr_error;
3036
3037 status = decode_attr_bitmap(xdr, bitmap);
3038 if (status < 0)
3039 goto xdr_error;
3040
3041 status = decode_attr_length(xdr, &attrlen, &savep);
3042 if (status < 0)
3043 goto xdr_error;
3044
3045
3046 status = decode_attr_type(xdr, bitmap, &type);
3047 if (status < 0)
3048 goto xdr_error;
3049 fattr->mode = 0;
3050 if (status != 0) {
3051 fattr->mode |= nfs_type2fmt[type];
3052 fattr->valid |= status;
3053 }
3054
3055 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3056 if (status < 0)
3057 goto xdr_error;
3058 fattr->valid |= status;
3059
3060 status = decode_attr_size(xdr, bitmap, &fattr->size);
3061 if (status < 0)
3062 goto xdr_error;
3063 fattr->valid |= status;
3064
3065 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3066 if (status < 0)
3067 goto xdr_error;
3068 fattr->valid |= status;
3069
3070 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3071 if (status < 0)
3072 goto xdr_error;
3073 fattr->valid |= status;
3074
3075 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3076 struct nfs4_fs_locations,
3077 fattr));
3078 if (status < 0)
3079 goto xdr_error;
3080 fattr->valid |= status;
3081
3082 status = decode_attr_mode(xdr, bitmap, &fmode);
3083 if (status < 0)
3084 goto xdr_error;
3085 if (status != 0) {
3086 fattr->mode |= fmode;
3087 fattr->valid |= status;
3088 }
3089
3090 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3091 if (status < 0)
3092 goto xdr_error;
3093 fattr->valid |= status;
3094
3095 status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3096 if (status < 0)
3097 goto xdr_error;
3098 fattr->valid |= status;
3099
3100 status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3101 if (status < 0)
3102 goto xdr_error;
3103 fattr->valid |= status;
3104
3105 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3106 if (status < 0)
3107 goto xdr_error;
3108 fattr->valid |= status;
3109
3110 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3111 if (status < 0)
3112 goto xdr_error;
3113 fattr->valid |= status;
3114
3115 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3116 if (status < 0)
3117 goto xdr_error;
3118 fattr->valid |= status;
3119
3120 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3121 if (status < 0)
3122 goto xdr_error;
3123 fattr->valid |= status;
3124
3125 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3126 if (status < 0)
3127 goto xdr_error;
3128 fattr->valid |= status;
3129
3130 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3131 if (status < 0)
3132 goto xdr_error;
3133 if (status != 0 && !(fattr->valid & status)) {
3134 fattr->fileid = fileid;
3135 fattr->valid |= status;
3136 }
3137
3138 status = verify_attr_len(xdr, savep, attrlen);
3139 xdr_error:
3140 dprintk("%s: xdr returned %d\n", __func__, -status);
3141 return status;
3142 }
3143
3144
3145 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3146 {
3147 __be32 *savep;
3148 uint32_t attrlen, bitmap[2];
3149 int status;
3150
3151 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3152 goto xdr_error;
3153 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3154 goto xdr_error;
3155 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3156 goto xdr_error;
3157
3158 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3159
3160 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3161 goto xdr_error;
3162 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3163 goto xdr_error;
3164 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3165 goto xdr_error;
3166 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3167 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3168 goto xdr_error;
3169 fsinfo->wtpref = fsinfo->wtmax;
3170
3171 status = verify_attr_len(xdr, savep, attrlen);
3172 xdr_error:
3173 dprintk("%s: xdr returned %d!\n", __func__, -status);
3174 return status;
3175 }
3176
3177 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3178 {
3179 __be32 *p;
3180 uint32_t len;
3181 int status;
3182
3183 /* Zero handle first to allow comparisons */
3184 memset(fh, 0, sizeof(*fh));
3185
3186 status = decode_op_hdr(xdr, OP_GETFH);
3187 if (status)
3188 return status;
3189
3190 READ_BUF(4);
3191 READ32(len);
3192 if (len > NFS4_FHSIZE)
3193 return -EIO;
3194 fh->size = len;
3195 READ_BUF(len);
3196 COPYMEM(fh->data, len);
3197 return 0;
3198 }
3199
3200 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3201 {
3202 int status;
3203
3204 status = decode_op_hdr(xdr, OP_LINK);
3205 if (status)
3206 return status;
3207 return decode_change_info(xdr, cinfo);
3208 }
3209
3210 /*
3211 * We create the owner, so we know a proper owner.id length is 4.
3212 */
3213 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3214 {
3215 uint64_t offset, length, clientid;
3216 __be32 *p;
3217 uint32_t namelen, type;
3218
3219 READ_BUF(32);
3220 READ64(offset);
3221 READ64(length);
3222 READ32(type);
3223 if (fl != NULL) {
3224 fl->fl_start = (loff_t)offset;
3225 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3226 if (length == ~(uint64_t)0)
3227 fl->fl_end = OFFSET_MAX;
3228 fl->fl_type = F_WRLCK;
3229 if (type & 1)
3230 fl->fl_type = F_RDLCK;
3231 fl->fl_pid = 0;
3232 }
3233 READ64(clientid);
3234 READ32(namelen);
3235 READ_BUF(namelen);
3236 return -NFS4ERR_DENIED;
3237 }
3238
3239 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3240 {
3241 __be32 *p;
3242 int status;
3243
3244 status = decode_op_hdr(xdr, OP_LOCK);
3245 if (status == -EIO)
3246 goto out;
3247 if (status == 0) {
3248 READ_BUF(NFS4_STATEID_SIZE);
3249 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3250 } else if (status == -NFS4ERR_DENIED)
3251 status = decode_lock_denied(xdr, NULL);
3252 if (res->open_seqid != NULL)
3253 nfs_increment_open_seqid(status, res->open_seqid);
3254 nfs_increment_lock_seqid(status, res->lock_seqid);
3255 out:
3256 return status;
3257 }
3258
3259 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3260 {
3261 int status;
3262 status = decode_op_hdr(xdr, OP_LOCKT);
3263 if (status == -NFS4ERR_DENIED)
3264 return decode_lock_denied(xdr, res->denied);
3265 return status;
3266 }
3267
3268 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3269 {
3270 __be32 *p;
3271 int status;
3272
3273 status = decode_op_hdr(xdr, OP_LOCKU);
3274 if (status != -EIO)
3275 nfs_increment_lock_seqid(status, res->seqid);
3276 if (status == 0) {
3277 READ_BUF(NFS4_STATEID_SIZE);
3278 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3279 }
3280 return status;
3281 }
3282
3283 static int decode_lookup(struct xdr_stream *xdr)
3284 {
3285 return decode_op_hdr(xdr, OP_LOOKUP);
3286 }
3287
3288 /* This is too sick! */
3289 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3290 {
3291 __be32 *p;
3292 uint32_t limit_type, nblocks, blocksize;
3293
3294 READ_BUF(12);
3295 READ32(limit_type);
3296 switch (limit_type) {
3297 case 1:
3298 READ64(*maxsize);
3299 break;
3300 case 2:
3301 READ32(nblocks);
3302 READ32(blocksize);
3303 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3304 }
3305 return 0;
3306 }
3307
3308 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3309 {
3310 __be32 *p;
3311 uint32_t delegation_type;
3312
3313 READ_BUF(4);
3314 READ32(delegation_type);
3315 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3316 res->delegation_type = 0;
3317 return 0;
3318 }
3319 READ_BUF(NFS4_STATEID_SIZE+4);
3320 COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3321 READ32(res->do_recall);
3322
3323 switch (delegation_type) {
3324 case NFS4_OPEN_DELEGATE_READ:
3325 res->delegation_type = FMODE_READ;
3326 break;
3327 case NFS4_OPEN_DELEGATE_WRITE:
3328 res->delegation_type = FMODE_WRITE|FMODE_READ;
3329 if (decode_space_limit(xdr, &res->maxsize) < 0)
3330 return -EIO;
3331 }
3332 return decode_ace(xdr, NULL, res->server->nfs_client);
3333 }
3334
3335 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3336 {
3337 __be32 *p;
3338 uint32_t savewords, bmlen, i;
3339 int status;
3340
3341 status = decode_op_hdr(xdr, OP_OPEN);
3342 if (status != -EIO)
3343 nfs_increment_open_seqid(status, res->seqid);
3344 if (status)
3345 return status;
3346 READ_BUF(NFS4_STATEID_SIZE);
3347 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3348
3349 decode_change_info(xdr, &res->cinfo);
3350
3351 READ_BUF(8);
3352 READ32(res->rflags);
3353 READ32(bmlen);
3354 if (bmlen > 10)
3355 goto xdr_error;
3356
3357 READ_BUF(bmlen << 2);
3358 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3359 for (i = 0; i < savewords; ++i)
3360 READ32(res->attrset[i]);
3361 for (; i < NFS4_BITMAP_SIZE; i++)
3362 res->attrset[i] = 0;
3363
3364 return decode_delegation(xdr, res);
3365 xdr_error:
3366 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3367 return -EIO;
3368 }
3369
3370 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3371 {
3372 __be32 *p;
3373 int status;
3374
3375 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3376 if (status != -EIO)
3377 nfs_increment_open_seqid(status, res->seqid);
3378 if (status)
3379 return status;
3380 READ_BUF(NFS4_STATEID_SIZE);
3381 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3382 return 0;
3383 }
3384
3385 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3386 {
3387 __be32 *p;
3388 int status;
3389
3390 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3391 if (status != -EIO)
3392 nfs_increment_open_seqid(status, res->seqid);
3393 if (status)
3394 return status;
3395 READ_BUF(NFS4_STATEID_SIZE);
3396 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3397 return 0;
3398 }
3399
3400 static int decode_putfh(struct xdr_stream *xdr)
3401 {
3402 return decode_op_hdr(xdr, OP_PUTFH);
3403 }
3404
3405 static int decode_putrootfh(struct xdr_stream *xdr)
3406 {
3407 return decode_op_hdr(xdr, OP_PUTROOTFH);
3408 }
3409
3410 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3411 {
3412 struct kvec *iov = req->rq_rcv_buf.head;
3413 __be32 *p;
3414 uint32_t count, eof, recvd, hdrlen;
3415 int status;
3416
3417 status = decode_op_hdr(xdr, OP_READ);
3418 if (status)
3419 return status;
3420 READ_BUF(8);
3421 READ32(eof);
3422 READ32(count);
3423 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3424 recvd = req->rq_rcv_buf.len - hdrlen;
3425 if (count > recvd) {
3426 dprintk("NFS: server cheating in read reply: "
3427 "count %u > recvd %u\n", count, recvd);
3428 count = recvd;
3429 eof = 0;
3430 }
3431 xdr_read_pages(xdr, count);
3432 res->eof = eof;
3433 res->count = count;
3434 return 0;
3435 }
3436
3437 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3438 {
3439 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3440 struct page *page = *rcvbuf->pages;
3441 struct kvec *iov = rcvbuf->head;
3442 size_t hdrlen;
3443 u32 recvd, pglen = rcvbuf->page_len;
3444 __be32 *end, *entry, *p, *kaddr;
3445 unsigned int nr = 0;
3446 int status;
3447
3448 status = decode_op_hdr(xdr, OP_READDIR);
3449 if (status)
3450 return status;
3451 READ_BUF(8);
3452 COPYMEM(readdir->verifier.data, 8);
3453 dprintk("%s: verifier = %08x:%08x\n",
3454 __func__,
3455 ((u32 *)readdir->verifier.data)[0],
3456 ((u32 *)readdir->verifier.data)[1]);
3457
3458
3459 hdrlen = (char *) p - (char *) iov->iov_base;
3460 recvd = rcvbuf->len - hdrlen;
3461 if (pglen > recvd)
3462 pglen = recvd;
3463 xdr_read_pages(xdr, pglen);
3464
3465 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3466 kaddr = p = kmap_atomic(page, KM_USER0);
3467 end = p + ((pglen + readdir->pgbase) >> 2);
3468 entry = p;
3469
3470 /* Make sure the packet actually has a value_follows and EOF entry */
3471 if ((entry + 1) > end)
3472 goto short_pkt;
3473
3474 for (; *p++; nr++) {
3475 u32 len, attrlen, xlen;
3476 if (end - p < 3)
3477 goto short_pkt;
3478 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3479 p += 2; /* cookie */
3480 len = ntohl(*p++); /* filename length */
3481 if (len > NFS4_MAXNAMLEN) {
3482 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3483 len);
3484 goto err_unmap;
3485 }
3486 xlen = XDR_QUADLEN(len);
3487 if (end - p < xlen + 1)
3488 goto short_pkt;
3489 dprintk("filename = %*s\n", len, (char *)p);
3490 p += xlen;
3491 len = ntohl(*p++); /* bitmap length */
3492 if (end - p < len + 1)
3493 goto short_pkt;
3494 p += len;
3495 attrlen = XDR_QUADLEN(ntohl(*p++));
3496 if (end - p < attrlen + 2)
3497 goto short_pkt;
3498 p += attrlen; /* attributes */
3499 entry = p;
3500 }
3501 /*
3502 * Apparently some server sends responses that are a valid size, but
3503 * contain no entries, and have value_follows==0 and EOF==0. For
3504 * those, just set the EOF marker.
3505 */
3506 if (!nr && entry[1] == 0) {
3507 dprintk("NFS: readdir reply truncated!\n");
3508 entry[1] = 1;
3509 }
3510 out:
3511 kunmap_atomic(kaddr, KM_USER0);
3512 return 0;
3513 short_pkt:
3514 /*
3515 * When we get a short packet there are 2 possibilities. We can
3516 * return an error, or fix up the response to look like a valid
3517 * response and return what we have so far. If there are no
3518 * entries and the packet was short, then return -EIO. If there
3519 * are valid entries in the response, return them and pretend that
3520 * the call was successful, but incomplete. The caller can retry the
3521 * readdir starting at the last cookie.
3522 */
3523 dprintk("%s: short packet at entry %d\n", __func__, nr);
3524 entry[0] = entry[1] = 0;
3525 if (nr)
3526 goto out;
3527 err_unmap:
3528 kunmap_atomic(kaddr, KM_USER0);
3529 return -errno_NFSERR_IO;
3530 }
3531
3532 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3533 {
3534 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3535 struct kvec *iov = rcvbuf->head;
3536 size_t hdrlen;
3537 u32 len, recvd;
3538 __be32 *p;
3539 char *kaddr;
3540 int status;
3541
3542 status = decode_op_hdr(xdr, OP_READLINK);
3543 if (status)
3544 return status;
3545
3546 /* Convert length of symlink */
3547 READ_BUF(4);
3548 READ32(len);
3549 if (len >= rcvbuf->page_len || len <= 0) {
3550 dprintk("nfs: server returned giant symlink!\n");
3551 return -ENAMETOOLONG;
3552 }
3553 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3554 recvd = req->rq_rcv_buf.len - hdrlen;
3555 if (recvd < len) {
3556 dprintk("NFS: server cheating in readlink reply: "
3557 "count %u > recvd %u\n", len, recvd);
3558 return -EIO;
3559 }
3560 xdr_read_pages(xdr, len);
3561 /*
3562 * The XDR encode routine has set things up so that
3563 * the link text will be copied directly into the
3564 * buffer. We just have to do overflow-checking,
3565 * and and null-terminate the text (the VFS expects
3566 * null-termination).
3567 */
3568 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3569 kaddr[len+rcvbuf->page_base] = '\0';
3570 kunmap_atomic(kaddr, KM_USER0);
3571 return 0;
3572 }
3573
3574 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3575 {
3576 int status;
3577
3578 status = decode_op_hdr(xdr, OP_REMOVE);
3579 if (status)
3580 goto out;
3581 status = decode_change_info(xdr, cinfo);
3582 out:
3583 return status;
3584 }
3585
3586 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3587 struct nfs4_change_info *new_cinfo)
3588 {
3589 int status;
3590
3591 status = decode_op_hdr(xdr, OP_RENAME);
3592 if (status)
3593 goto out;
3594 if ((status = decode_change_info(xdr, old_cinfo)))
3595 goto out;
3596 status = decode_change_info(xdr, new_cinfo);
3597 out:
3598 return status;
3599 }
3600
3601 static int decode_renew(struct xdr_stream *xdr)
3602 {
3603 return decode_op_hdr(xdr, OP_RENEW);
3604 }
3605
3606 static int
3607 decode_restorefh(struct xdr_stream *xdr)
3608 {
3609 return decode_op_hdr(xdr, OP_RESTOREFH);
3610 }
3611
3612 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3613 size_t *acl_len)
3614 {
3615 __be32 *savep;
3616 uint32_t attrlen,
3617 bitmap[2] = {0};
3618 struct kvec *iov = req->rq_rcv_buf.head;
3619 int status;
3620
3621 *acl_len = 0;
3622 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3623 goto out;
3624 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3625 goto out;
3626 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3627 goto out;
3628
3629 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3630 return -EIO;
3631 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3632 size_t hdrlen;
3633 u32 recvd;
3634
3635 /* We ignore &savep and don't do consistency checks on
3636 * the attr length. Let userspace figure it out.... */
3637 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3638 recvd = req->rq_rcv_buf.len - hdrlen;
3639 if (attrlen > recvd) {
3640 dprintk("NFS: server cheating in getattr"
3641 " acl reply: attrlen %u > recvd %u\n",
3642 attrlen, recvd);
3643 return -EINVAL;
3644 }
3645 xdr_read_pages(xdr, attrlen);
3646 *acl_len = attrlen;
3647 } else
3648 status = -EOPNOTSUPP;
3649
3650 out:
3651 return status;
3652 }
3653
3654 static int
3655 decode_savefh(struct xdr_stream *xdr)
3656 {
3657 return decode_op_hdr(xdr, OP_SAVEFH);
3658 }
3659
3660 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3661 {
3662 __be32 *p;
3663 uint32_t bmlen;
3664 int status;
3665
3666 status = decode_op_hdr(xdr, OP_SETATTR);
3667 if (status)
3668 return status;
3669 READ_BUF(4);
3670 READ32(bmlen);
3671 READ_BUF(bmlen << 2);
3672 return 0;
3673 }
3674
3675 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3676 {
3677 __be32 *p;
3678 uint32_t opnum;
3679 int32_t nfserr;
3680
3681 READ_BUF(8);
3682 READ32(opnum);
3683 if (opnum != OP_SETCLIENTID) {
3684 dprintk("nfs: decode_setclientid: Server returned operation"
3685 " %d\n", opnum);
3686 return -EIO;
3687 }
3688 READ32(nfserr);
3689 if (nfserr == NFS_OK) {
3690 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3691 READ64(clp->cl_clientid);
3692 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3693 } else if (nfserr == NFSERR_CLID_INUSE) {
3694 uint32_t len;
3695
3696 /* skip netid string */
3697 READ_BUF(4);
3698 READ32(len);
3699 READ_BUF(len);
3700
3701 /* skip uaddr string */
3702 READ_BUF(4);
3703 READ32(len);
3704 READ_BUF(len);
3705 return -NFSERR_CLID_INUSE;
3706 } else
3707 return nfs4_stat_to_errno(nfserr);
3708
3709 return 0;
3710 }
3711
3712 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3713 {
3714 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3715 }
3716
3717 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3718 {
3719 __be32 *p;
3720 int status;
3721
3722 status = decode_op_hdr(xdr, OP_WRITE);
3723 if (status)
3724 return status;
3725
3726 READ_BUF(16);
3727 READ32(res->count);
3728 READ32(res->verf->committed);
3729 COPYMEM(res->verf->verifier, 8);
3730 return 0;
3731 }
3732
3733 static int decode_delegreturn(struct xdr_stream *xdr)
3734 {
3735 return decode_op_hdr(xdr, OP_DELEGRETURN);
3736 }
3737
3738 /*
3739 * END OF "GENERIC" DECODE ROUTINES.
3740 */
3741
3742 /*
3743 * Decode OPEN_DOWNGRADE response
3744 */
3745 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3746 {
3747 struct xdr_stream xdr;
3748 struct compound_hdr hdr;
3749 int status;
3750
3751 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3752 status = decode_compound_hdr(&xdr, &hdr);
3753 if (status)
3754 goto out;
3755 status = decode_putfh(&xdr);
3756 if (status)
3757 goto out;
3758 status = decode_open_downgrade(&xdr, res);
3759 if (status != 0)
3760 goto out;
3761 decode_getfattr(&xdr, res->fattr, res->server);
3762 out:
3763 return status;
3764 }
3765
3766 /*
3767 * Decode ACCESS response
3768 */
3769 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3770 {
3771 struct xdr_stream xdr;
3772 struct compound_hdr hdr;
3773 int status;
3774
3775 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3776 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3777 goto out;
3778 status = decode_putfh(&xdr);
3779 if (status != 0)
3780 goto out;
3781 status = decode_access(&xdr, res);
3782 if (status != 0)
3783 goto out;
3784 decode_getfattr(&xdr, res->fattr, res->server);
3785 out:
3786 return status;
3787 }
3788
3789 /*
3790 * Decode LOOKUP response
3791 */
3792 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3793 {
3794 struct xdr_stream xdr;
3795 struct compound_hdr hdr;
3796 int status;
3797
3798 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3799 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3800 goto out;
3801 if ((status = decode_putfh(&xdr)) != 0)
3802 goto out;
3803 if ((status = decode_lookup(&xdr)) != 0)
3804 goto out;
3805 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3806 goto out;
3807 status = decode_getfattr(&xdr, res->fattr, res->server);
3808 out:
3809 return status;
3810 }
3811
3812 /*
3813 * Decode LOOKUP_ROOT response
3814 */
3815 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3816 {
3817 struct xdr_stream xdr;
3818 struct compound_hdr hdr;
3819 int status;
3820
3821 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3822 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3823 goto out;
3824 if ((status = decode_putrootfh(&xdr)) != 0)
3825 goto out;
3826 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3827 status = decode_getfattr(&xdr, res->fattr, res->server);
3828 out:
3829 return status;
3830 }
3831
3832 /*
3833 * Decode REMOVE response
3834 */
3835 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3836 {
3837 struct xdr_stream xdr;
3838 struct compound_hdr hdr;
3839 int status;
3840
3841 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3842 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3843 goto out;
3844 if ((status = decode_putfh(&xdr)) != 0)
3845 goto out;
3846 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3847 goto out;
3848 decode_getfattr(&xdr, &res->dir_attr, res->server);
3849 out:
3850 return status;
3851 }
3852
3853 /*
3854 * Decode RENAME response
3855 */
3856 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3857 {
3858 struct xdr_stream xdr;
3859 struct compound_hdr hdr;
3860 int status;
3861
3862 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3863 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3864 goto out;
3865 if ((status = decode_putfh(&xdr)) != 0)
3866 goto out;
3867 if ((status = decode_savefh(&xdr)) != 0)
3868 goto out;
3869 if ((status = decode_putfh(&xdr)) != 0)
3870 goto out;
3871 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3872 goto out;
3873 /* Current FH is target directory */
3874 if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3875 goto out;
3876 if ((status = decode_restorefh(&xdr)) != 0)
3877 goto out;
3878 decode_getfattr(&xdr, res->old_fattr, res->server);
3879 out:
3880 return status;
3881 }
3882
3883 /*
3884 * Decode LINK response
3885 */
3886 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3887 {
3888 struct xdr_stream xdr;
3889 struct compound_hdr hdr;
3890 int status;
3891
3892 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3893 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3894 goto out;
3895 if ((status = decode_putfh(&xdr)) != 0)
3896 goto out;
3897 if ((status = decode_savefh(&xdr)) != 0)
3898 goto out;
3899 if ((status = decode_putfh(&xdr)) != 0)
3900 goto out;
3901 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3902 goto out;
3903 /*
3904 * Note order: OP_LINK leaves the directory as the current
3905 * filehandle.
3906 */
3907 if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3908 goto out;
3909 if ((status = decode_restorefh(&xdr)) != 0)
3910 goto out;
3911 decode_getfattr(&xdr, res->fattr, res->server);
3912 out:
3913 return status;
3914 }
3915
3916 /*
3917 * Decode CREATE response
3918 */
3919 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3920 {
3921 struct xdr_stream xdr;
3922 struct compound_hdr hdr;
3923 int status;
3924
3925 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3926 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3927 goto out;
3928 if ((status = decode_putfh(&xdr)) != 0)
3929 goto out;
3930 if ((status = decode_savefh(&xdr)) != 0)
3931 goto out;
3932 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3933 goto out;
3934 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3935 goto out;
3936 if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3937 goto out;
3938 if ((status = decode_restorefh(&xdr)) != 0)
3939 goto out;
3940 decode_getfattr(&xdr, res->dir_fattr, res->server);
3941 out:
3942 return status;
3943 }
3944
3945 /*
3946 * Decode SYMLINK response
3947 */
3948 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3949 {
3950 return nfs4_xdr_dec_create(rqstp, p, res);
3951 }
3952
3953 /*
3954 * Decode GETATTR response
3955 */
3956 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3957 {
3958 struct xdr_stream xdr;
3959 struct compound_hdr hdr;
3960 int status;
3961
3962 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3963 status = decode_compound_hdr(&xdr, &hdr);
3964 if (status)
3965 goto out;
3966 status = decode_putfh(&xdr);
3967 if (status)
3968 goto out;
3969 status = decode_getfattr(&xdr, res->fattr, res->server);
3970 out:
3971 return status;
3972 }
3973
3974 /*
3975 * Encode an SETACL request
3976 */
3977 static int
3978 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3979 {
3980 struct xdr_stream xdr;
3981 struct compound_hdr hdr = {
3982 .nops = 0,
3983 };
3984 int status;
3985
3986 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3987 encode_compound_hdr(&xdr, &hdr);
3988 encode_putfh(&xdr, args->fh, &hdr);
3989 status = encode_setacl(&xdr, args, &hdr);
3990 encode_nops(&hdr);
3991 return status;
3992 }
3993
3994 /*
3995 * Decode SETACL response
3996 */
3997 static int
3998 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3999 {
4000 struct xdr_stream xdr;
4001 struct compound_hdr hdr;
4002 int status;
4003
4004 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4005 status = decode_compound_hdr(&xdr, &hdr);
4006 if (status)
4007 goto out;
4008 status = decode_putfh(&xdr);
4009 if (status)
4010 goto out;
4011 status = decode_setattr(&xdr, res);
4012 out:
4013 return status;
4014 }
4015
4016 /*
4017 * Decode GETACL response
4018 */
4019 static int
4020 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4021 {
4022 struct xdr_stream xdr;
4023 struct compound_hdr hdr;
4024 int status;
4025
4026 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4027 status = decode_compound_hdr(&xdr, &hdr);
4028 if (status)
4029 goto out;
4030 status = decode_putfh(&xdr);
4031 if (status)
4032 goto out;
4033 status = decode_getacl(&xdr, rqstp, acl_len);
4034
4035 out:
4036 return status;
4037 }
4038
4039 /*
4040 * Decode CLOSE response
4041 */
4042 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4043 {
4044 struct xdr_stream xdr;
4045 struct compound_hdr hdr;
4046 int status;
4047
4048 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4049 status = decode_compound_hdr(&xdr, &hdr);
4050 if (status)
4051 goto out;
4052 status = decode_putfh(&xdr);
4053 if (status)
4054 goto out;
4055 status = decode_close(&xdr, res);
4056 if (status != 0)
4057 goto out;
4058 /*
4059 * Note: Server may do delete on close for this file
4060 * in which case the getattr call will fail with
4061 * an ESTALE error. Shouldn't be a problem,
4062 * though, since fattr->valid will remain unset.
4063 */
4064 decode_getfattr(&xdr, res->fattr, res->server);
4065 out:
4066 return status;
4067 }
4068
4069 /*
4070 * Decode OPEN response
4071 */
4072 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4073 {
4074 struct xdr_stream xdr;
4075 struct compound_hdr hdr;
4076 int status;
4077
4078 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4079 status = decode_compound_hdr(&xdr, &hdr);
4080 if (status)
4081 goto out;
4082 status = decode_putfh(&xdr);
4083 if (status)
4084 goto out;
4085 status = decode_savefh(&xdr);
4086 if (status)
4087 goto out;
4088 status = decode_open(&xdr, res);
4089 if (status)
4090 goto out;
4091 if (decode_getfh(&xdr, &res->fh) != 0)
4092 goto out;
4093 if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4094 goto out;
4095 if (decode_restorefh(&xdr) != 0)
4096 goto out;
4097 decode_getfattr(&xdr, res->dir_attr, res->server);
4098 out:
4099 return status;
4100 }
4101
4102 /*
4103 * Decode OPEN_CONFIRM response
4104 */
4105 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4106 {
4107 struct xdr_stream xdr;
4108 struct compound_hdr hdr;
4109 int status;
4110
4111 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4112 status = decode_compound_hdr(&xdr, &hdr);
4113 if (status)
4114 goto out;
4115 status = decode_putfh(&xdr);
4116 if (status)
4117 goto out;
4118 status = decode_open_confirm(&xdr, res);
4119 out:
4120 return status;
4121 }
4122
4123 /*
4124 * Decode OPEN response
4125 */
4126 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4127 {
4128 struct xdr_stream xdr;
4129 struct compound_hdr hdr;
4130 int status;
4131
4132 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4133 status = decode_compound_hdr(&xdr, &hdr);
4134 if (status)
4135 goto out;
4136 status = decode_putfh(&xdr);
4137 if (status)
4138 goto out;
4139 status = decode_open(&xdr, res);
4140 if (status)
4141 goto out;
4142 decode_getfattr(&xdr, res->f_attr, res->server);
4143 out:
4144 return status;
4145 }
4146
4147 /*
4148 * Decode SETATTR response
4149 */
4150 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4151 {
4152 struct xdr_stream xdr;
4153 struct compound_hdr hdr;
4154 int status;
4155
4156 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4157 status = decode_compound_hdr(&xdr, &hdr);
4158 if (status)
4159 goto out;
4160 status = decode_putfh(&xdr);
4161 if (status)
4162 goto out;
4163 status = decode_setattr(&xdr, res);
4164 if (status)
4165 goto out;
4166 decode_getfattr(&xdr, res->fattr, res->server);
4167 out:
4168 return status;
4169 }
4170
4171 /*
4172 * Decode LOCK response
4173 */
4174 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4175 {
4176 struct xdr_stream xdr;
4177 struct compound_hdr hdr;
4178 int status;
4179
4180 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4181 status = decode_compound_hdr(&xdr, &hdr);
4182 if (status)
4183 goto out;
4184 status = decode_putfh(&xdr);
4185 if (status)
4186 goto out;
4187 status = decode_lock(&xdr, res);
4188 out:
4189 return status;
4190 }
4191
4192 /*
4193 * Decode LOCKT response
4194 */
4195 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4196 {
4197 struct xdr_stream xdr;
4198 struct compound_hdr hdr;
4199 int status;
4200
4201 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4202 status = decode_compound_hdr(&xdr, &hdr);
4203 if (status)
4204 goto out;
4205 status = decode_putfh(&xdr);
4206 if (status)
4207 goto out;
4208 status = decode_lockt(&xdr, res);
4209 out:
4210 return status;
4211 }
4212
4213 /*
4214 * Decode LOCKU response
4215 */
4216 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4217 {
4218 struct xdr_stream xdr;
4219 struct compound_hdr hdr;
4220 int status;
4221
4222 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4223 status = decode_compound_hdr(&xdr, &hdr);
4224 if (status)
4225 goto out;
4226 status = decode_putfh(&xdr);
4227 if (status)
4228 goto out;
4229 status = decode_locku(&xdr, res);
4230 out:
4231 return status;
4232 }
4233
4234 /*
4235 * Decode READLINK response
4236 */
4237 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4238 {
4239 struct xdr_stream xdr;
4240 struct compound_hdr hdr;
4241 int status;
4242
4243 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4244 status = decode_compound_hdr(&xdr, &hdr);
4245 if (status)
4246 goto out;
4247 status = decode_putfh(&xdr);
4248 if (status)
4249 goto out;
4250 status = decode_readlink(&xdr, rqstp);
4251 out:
4252 return status;
4253 }
4254
4255 /*
4256 * Decode READDIR response
4257 */
4258 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4259 {
4260 struct xdr_stream xdr;
4261 struct compound_hdr hdr;
4262 int status;
4263
4264 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4265 status = decode_compound_hdr(&xdr, &hdr);
4266 if (status)
4267 goto out;
4268 status = decode_putfh(&xdr);
4269 if (status)
4270 goto out;
4271 status = decode_readdir(&xdr, rqstp, res);
4272 out:
4273 return status;
4274 }
4275
4276 /*
4277 * Decode Read response
4278 */
4279 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4280 {
4281 struct xdr_stream xdr;
4282 struct compound_hdr hdr;
4283 int status;
4284
4285 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4286 status = decode_compound_hdr(&xdr, &hdr);
4287 if (status)
4288 goto out;
4289 status = decode_putfh(&xdr);
4290 if (status)
4291 goto out;
4292 status = decode_read(&xdr, rqstp, res);
4293 if (!status)
4294 status = res->count;
4295 out:
4296 return status;
4297 }
4298
4299 /*
4300 * Decode WRITE response
4301 */
4302 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4303 {
4304 struct xdr_stream xdr;
4305 struct compound_hdr hdr;
4306 int status;
4307
4308 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4309 status = decode_compound_hdr(&xdr, &hdr);
4310 if (status)
4311 goto out;
4312 status = decode_putfh(&xdr);
4313 if (status)
4314 goto out;
4315 status = decode_write(&xdr, res);
4316 if (status)
4317 goto out;
4318 decode_getfattr(&xdr, res->fattr, res->server);
4319 if (!status)
4320 status = res->count;
4321 out:
4322 return status;
4323 }
4324
4325 /*
4326 * Decode COMMIT response
4327 */
4328 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4329 {
4330 struct xdr_stream xdr;
4331 struct compound_hdr hdr;
4332 int status;
4333
4334 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4335 status = decode_compound_hdr(&xdr, &hdr);
4336 if (status)
4337 goto out;
4338 status = decode_putfh(&xdr);
4339 if (status)
4340 goto out;
4341 status = decode_commit(&xdr, res);
4342 if (status)
4343 goto out;
4344 decode_getfattr(&xdr, res->fattr, res->server);
4345 out:
4346 return status;
4347 }
4348
4349 /*
4350 * FSINFO request
4351 */
4352 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4353 {
4354 struct xdr_stream xdr;
4355 struct compound_hdr hdr;
4356 int status;
4357
4358 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4359 status = decode_compound_hdr(&xdr, &hdr);
4360 if (!status)
4361 status = decode_putfh(&xdr);
4362 if (!status)
4363 status = decode_fsinfo(&xdr, fsinfo);
4364 return status;
4365 }
4366
4367 /*
4368 * PATHCONF request
4369 */
4370 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4371 {
4372 struct xdr_stream xdr;
4373 struct compound_hdr hdr;
4374 int status;
4375
4376 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4377 status = decode_compound_hdr(&xdr, &hdr);
4378 if (!status)
4379 status = decode_putfh(&xdr);
4380 if (!status)
4381 status = decode_pathconf(&xdr, pathconf);
4382 return status;
4383 }
4384
4385 /*
4386 * STATFS request
4387 */
4388 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4389 {
4390 struct xdr_stream xdr;
4391 struct compound_hdr hdr;
4392 int status;
4393
4394 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4395 status = decode_compound_hdr(&xdr, &hdr);
4396 if (!status)
4397 status = decode_putfh(&xdr);
4398 if (!status)
4399 status = decode_statfs(&xdr, fsstat);
4400 return status;
4401 }
4402
4403 /*
4404 * GETATTR_BITMAP request
4405 */
4406 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4407 {
4408 struct xdr_stream xdr;
4409 struct compound_hdr hdr;
4410 int status;
4411
4412 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4413 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4414 goto out;
4415 if ((status = decode_putfh(&xdr)) != 0)
4416 goto out;
4417 status = decode_server_caps(&xdr, res);
4418 out:
4419 return status;
4420 }
4421
4422 /*
4423 * Decode RENEW response
4424 */
4425 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4426 {
4427 struct xdr_stream xdr;
4428 struct compound_hdr hdr;
4429 int status;
4430
4431 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4432 status = decode_compound_hdr(&xdr, &hdr);
4433 if (!status)
4434 status = decode_renew(&xdr);
4435 return status;
4436 }
4437
4438 /*
4439 * a SETCLIENTID request
4440 */
4441 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4442 struct nfs_client *clp)
4443 {
4444 struct xdr_stream xdr;
4445 struct compound_hdr hdr;
4446 int status;
4447
4448 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4449 status = decode_compound_hdr(&xdr, &hdr);
4450 if (!status)
4451 status = decode_setclientid(&xdr, clp);
4452 return status;
4453 }
4454
4455 /*
4456 * a SETCLIENTID_CONFIRM request
4457 */
4458 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4459 {
4460 struct xdr_stream xdr;
4461 struct compound_hdr hdr;
4462 int status;
4463
4464 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4465 status = decode_compound_hdr(&xdr, &hdr);
4466 if (!status)
4467 status = decode_setclientid_confirm(&xdr);
4468 if (!status)
4469 status = decode_putrootfh(&xdr);
4470 if (!status)
4471 status = decode_fsinfo(&xdr, fsinfo);
4472 return status;
4473 }
4474
4475 /*
4476 * DELEGRETURN request
4477 */
4478 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4479 {
4480 struct xdr_stream xdr;
4481 struct compound_hdr hdr;
4482 int status;
4483
4484 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4485 status = decode_compound_hdr(&xdr, &hdr);
4486 if (status != 0)
4487 goto out;
4488 status = decode_putfh(&xdr);
4489 if (status != 0)
4490 goto out;
4491 status = decode_delegreturn(&xdr);
4492 decode_getfattr(&xdr, res->fattr, res->server);
4493 out:
4494 return status;
4495 }
4496
4497 /*
4498 * FS_LOCATIONS request
4499 */
4500 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4501 {
4502 struct xdr_stream xdr;
4503 struct compound_hdr hdr;
4504 int status;
4505
4506 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4507 status = decode_compound_hdr(&xdr, &hdr);
4508 if (status != 0)
4509 goto out;
4510 if ((status = decode_putfh(&xdr)) != 0)
4511 goto out;
4512 if ((status = decode_lookup(&xdr)) != 0)
4513 goto out;
4514 xdr_enter_page(&xdr, PAGE_SIZE);
4515 status = decode_getfattr(&xdr, &res->fattr, res->server);
4516 out:
4517 return status;
4518 }
4519
4520 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4521 {
4522 uint32_t bitmap[2] = {0};
4523 uint32_t len;
4524
4525 if (!*p++) {
4526 if (!*p)
4527 return ERR_PTR(-EAGAIN);
4528 entry->eof = 1;
4529 return ERR_PTR(-EBADCOOKIE);
4530 }
4531
4532 entry->prev_cookie = entry->cookie;
4533 p = xdr_decode_hyper(p, &entry->cookie);
4534 entry->len = ntohl(*p++);
4535 entry->name = (const char *) p;
4536 p += XDR_QUADLEN(entry->len);
4537
4538 /*
4539 * In case the server doesn't return an inode number,
4540 * we fake one here. (We don't use inode number 0,
4541 * since glibc seems to choke on it...)
4542 */
4543 entry->ino = 1;
4544
4545 len = ntohl(*p++); /* bitmap length */
4546 if (len-- > 0) {
4547 bitmap[0] = ntohl(*p++);
4548 if (len-- > 0) {
4549 bitmap[1] = ntohl(*p++);
4550 p += len;
4551 }
4552 }
4553 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4554 if (len > 0) {
4555 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4556 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4557 /* Ignore the return value of rdattr_error for now */
4558 p++;
4559 len--;
4560 }
4561 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4562 xdr_decode_hyper(p, &entry->ino);
4563 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4564 xdr_decode_hyper(p, &entry->ino);
4565 p += len;
4566 }
4567
4568 entry->eof = !p[0] && p[1];
4569 return p;
4570 }
4571
4572 /*
4573 * We need to translate between nfs status return values and
4574 * the local errno values which may not be the same.
4575 */
4576 static struct {
4577 int stat;
4578 int errno;
4579 } nfs_errtbl[] = {
4580 { NFS4_OK, 0 },
4581 { NFS4ERR_PERM, -EPERM },
4582 { NFS4ERR_NOENT, -ENOENT },
4583 { NFS4ERR_IO, -errno_NFSERR_IO},
4584 { NFS4ERR_NXIO, -ENXIO },
4585 { NFS4ERR_ACCESS, -EACCES },
4586 { NFS4ERR_EXIST, -EEXIST },
4587 { NFS4ERR_XDEV, -EXDEV },
4588 { NFS4ERR_NOTDIR, -ENOTDIR },
4589 { NFS4ERR_ISDIR, -EISDIR },
4590 { NFS4ERR_INVAL, -EINVAL },
4591 { NFS4ERR_FBIG, -EFBIG },
4592 { NFS4ERR_NOSPC, -ENOSPC },
4593 { NFS4ERR_ROFS, -EROFS },
4594 { NFS4ERR_MLINK, -EMLINK },
4595 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
4596 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
4597 { NFS4ERR_DQUOT, -EDQUOT },
4598 { NFS4ERR_STALE, -ESTALE },
4599 { NFS4ERR_BADHANDLE, -EBADHANDLE },
4600 { NFS4ERR_BADOWNER, -EINVAL },
4601 { NFS4ERR_BADNAME, -EINVAL },
4602 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
4603 { NFS4ERR_NOTSUPP, -ENOTSUPP },
4604 { NFS4ERR_TOOSMALL, -ETOOSMALL },
4605 { NFS4ERR_SERVERFAULT, -ESERVERFAULT },
4606 { NFS4ERR_BADTYPE, -EBADTYPE },
4607 { NFS4ERR_LOCKED, -EAGAIN },
4608 { NFS4ERR_RESOURCE, -EREMOTEIO },
4609 { NFS4ERR_SYMLINK, -ELOOP },
4610 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
4611 { NFS4ERR_DEADLOCK, -EDEADLK },
4612 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
4613 * to be handled by a
4614 * middle-layer.
4615 */
4616 { -1, -EIO }
4617 };
4618
4619 /*
4620 * Convert an NFS error code to a local one.
4621 * This one is used jointly by NFSv2 and NFSv3.
4622 */
4623 static int
4624 nfs4_stat_to_errno(int stat)
4625 {
4626 int i;
4627 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4628 if (nfs_errtbl[i].stat == stat)
4629 return nfs_errtbl[i].errno;
4630 }
4631 if (stat <= 10000 || stat > 10100) {
4632 /* The server is looney tunes. */
4633 return -ESERVERFAULT;
4634 }
4635 /* If we cannot translate the error, the recovery routines should
4636 * handle it.
4637 * Note: remaining NFSv4 error codes have values > 10000, so should
4638 * not conflict with native Linux error codes.
4639 */
4640 return -stat;
4641 }
4642
4643 #define PROC(proc, argtype, restype) \
4644 [NFSPROC4_CLNT_##proc] = { \
4645 .p_proc = NFSPROC4_COMPOUND, \
4646 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4647 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
4648 .p_arglen = NFS4_##argtype##_sz, \
4649 .p_replen = NFS4_##restype##_sz, \
4650 .p_statidx = NFSPROC4_CLNT_##proc, \
4651 .p_name = #proc, \
4652 }
4653
4654 struct rpc_procinfo nfs4_procedures[] = {
4655 PROC(READ, enc_read, dec_read),
4656 PROC(WRITE, enc_write, dec_write),
4657 PROC(COMMIT, enc_commit, dec_commit),
4658 PROC(OPEN, enc_open, dec_open),
4659 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4660 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4661 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4662 PROC(CLOSE, enc_close, dec_close),
4663 PROC(SETATTR, enc_setattr, dec_setattr),
4664 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4665 PROC(RENEW, enc_renew, dec_renew),
4666 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4667 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4668 PROC(LOCK, enc_lock, dec_lock),
4669 PROC(LOCKT, enc_lockt, dec_lockt),
4670 PROC(LOCKU, enc_locku, dec_locku),
4671 PROC(ACCESS, enc_access, dec_access),
4672 PROC(GETATTR, enc_getattr, dec_getattr),
4673 PROC(LOOKUP, enc_lookup, dec_lookup),
4674 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4675 PROC(REMOVE, enc_remove, dec_remove),
4676 PROC(RENAME, enc_rename, dec_rename),
4677 PROC(LINK, enc_link, dec_link),
4678 PROC(SYMLINK, enc_symlink, dec_symlink),
4679 PROC(CREATE, enc_create, dec_create),
4680 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4681 PROC(STATFS, enc_statfs, dec_statfs),
4682 PROC(READLINK, enc_readlink, dec_readlink),
4683 PROC(READDIR, enc_readdir, dec_readdir),
4684 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4685 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
4686 PROC(GETACL, enc_getacl, dec_getacl),
4687 PROC(SETACL, enc_setacl, dec_setacl),
4688 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
4689 };
4690
4691 struct rpc_version nfs_version4 = {
4692 .number = 4,
4693 .nrprocs = ARRAY_SIZE(nfs4_procedures),
4694 .procs = nfs4_procedures
4695 };
4696
4697 /*
4698 * Local variables:
4699 * c-basic-offset: 8
4700 * End:
4701 */
linux 2.6 git repository for openrd