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nfs41: exchange_id operation
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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
61static 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 decode_remove_maxsz (op_decode_hdr_maxsz + \
196 decode_change_info_maxsz)
197#define encode_rename_maxsz (op_encode_hdr_maxsz + \
198 2 * nfs4_name_maxsz)
199#define decode_rename_maxsz (op_decode_hdr_maxsz + \
200 decode_change_info_maxsz + \
201 decode_change_info_maxsz)
202#define encode_link_maxsz (op_encode_hdr_maxsz + \
203 nfs4_name_maxsz)
204#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
205#define encode_lock_maxsz (op_encode_hdr_maxsz + \
206 7 + \
207 1 + encode_stateid_maxsz + 8)
208#define decode_lock_denied_maxsz \
209 (8 + decode_lockowner_maxsz)
210#define decode_lock_maxsz (op_decode_hdr_maxsz + \
211 decode_lock_denied_maxsz)
212#define encode_lockt_maxsz (op_encode_hdr_maxsz + 12)
213#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
214 decode_lock_denied_maxsz)
215#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
216 encode_stateid_maxsz + \
217 4)
218#define decode_locku_maxsz (op_decode_hdr_maxsz + \
219 decode_stateid_maxsz)
220#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
221#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
222#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
223 1 + nfs4_name_maxsz + \
224 1 + \
225 nfs4_fattr_maxsz)
226#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
227#define encode_create_maxsz (op_encode_hdr_maxsz + \
228 1 + 2 + nfs4_name_maxsz + \
229 encode_attrs_maxsz)
230#define decode_create_maxsz (op_decode_hdr_maxsz + \
231 decode_change_info_maxsz + \
232 nfs4_fattr_bitmap_maxsz)
233#define encode_statfs_maxsz (encode_getattr_maxsz)
234#define decode_statfs_maxsz (decode_getattr_maxsz)
235#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
236#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
237#define encode_getacl_maxsz (encode_getattr_maxsz)
238#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
239 nfs4_fattr_bitmap_maxsz + 1)
240#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
241 encode_stateid_maxsz + 3)
242#define decode_setacl_maxsz (decode_setattr_maxsz)
243#define encode_fs_locations_maxsz \
244 (encode_getattr_maxsz)
245#define decode_fs_locations_maxsz \
246 (0)
247
248#if defined(CONFIG_NFS_V4_1)
249#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
250 encode_verifier_maxsz + \
251 1 /* co_ownerid.len */ + \
252 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
253 1 /* flags */ + \
254 1 /* spa_how */ + \
255 0 /* SP4_NONE (for now) */ + \
256 1 /* zero implemetation id array */)
257#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
258 2 /* eir_clientid */ + \
259 1 /* eir_sequenceid */ + \
260 1 /* eir_flags */ + \
261 1 /* spr_how */ + \
262 0 /* SP4_NONE (for now) */ + \
263 2 /* eir_server_owner.so_minor_id */ + \
264 /* eir_server_owner.so_major_id<> */ \
265 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
266 /* eir_server_scope<> */ \
267 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
268 1 /* eir_server_impl_id array length */ + \
269 0 /* ignored eir_server_impl_id contents */)
270#define encode_sequence_maxsz 0 /* stub */
271#define decode_sequence_maxsz 0 /* stub */
272#else /* CONFIG_NFS_V4_1 */
273#define encode_sequence_maxsz 0
274#define decode_sequence_maxsz 0
275#endif /* CONFIG_NFS_V4_1 */
276
277#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
278#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
279#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
280 encode_sequence_maxsz + \
281 encode_putfh_maxsz + \
282 encode_read_maxsz)
283#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
284 decode_sequence_maxsz + \
285 decode_putfh_maxsz + \
286 decode_read_maxsz)
287#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
288 encode_sequence_maxsz + \
289 encode_putfh_maxsz + \
290 encode_readlink_maxsz)
291#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
292 decode_sequence_maxsz + \
293 decode_putfh_maxsz + \
294 decode_readlink_maxsz)
295#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
296 encode_sequence_maxsz + \
297 encode_putfh_maxsz + \
298 encode_readdir_maxsz)
299#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
300 decode_sequence_maxsz + \
301 decode_putfh_maxsz + \
302 decode_readdir_maxsz)
303#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
304 encode_sequence_maxsz + \
305 encode_putfh_maxsz + \
306 encode_write_maxsz + \
307 encode_getattr_maxsz)
308#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
309 decode_sequence_maxsz + \
310 decode_putfh_maxsz + \
311 decode_write_maxsz + \
312 decode_getattr_maxsz)
313#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
314 encode_sequence_maxsz + \
315 encode_putfh_maxsz + \
316 encode_commit_maxsz + \
317 encode_getattr_maxsz)
318#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
319 decode_sequence_maxsz + \
320 decode_putfh_maxsz + \
321 decode_commit_maxsz + \
322 decode_getattr_maxsz)
323#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
324 encode_sequence_maxsz + \
325 encode_putfh_maxsz + \
326 encode_savefh_maxsz + \
327 encode_open_maxsz + \
328 encode_getfh_maxsz + \
329 encode_getattr_maxsz + \
330 encode_restorefh_maxsz + \
331 encode_getattr_maxsz)
332#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
333 decode_sequence_maxsz + \
334 decode_putfh_maxsz + \
335 decode_savefh_maxsz + \
336 decode_open_maxsz + \
337 decode_getfh_maxsz + \
338 decode_getattr_maxsz + \
339 decode_restorefh_maxsz + \
340 decode_getattr_maxsz)
341#define NFS4_enc_open_confirm_sz \
342 (compound_encode_hdr_maxsz + \
343 encode_putfh_maxsz + \
344 encode_open_confirm_maxsz)
345#define NFS4_dec_open_confirm_sz \
346 (compound_decode_hdr_maxsz + \
347 decode_putfh_maxsz + \
348 decode_open_confirm_maxsz)
349#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
350 encode_sequence_maxsz + \
351 encode_putfh_maxsz + \
352 encode_open_maxsz + \
353 encode_getattr_maxsz)
354#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
355 decode_sequence_maxsz + \
356 decode_putfh_maxsz + \
357 decode_open_maxsz + \
358 decode_getattr_maxsz)
359#define NFS4_enc_open_downgrade_sz \
360 (compound_encode_hdr_maxsz + \
361 encode_sequence_maxsz + \
362 encode_putfh_maxsz + \
363 encode_open_downgrade_maxsz + \
364 encode_getattr_maxsz)
365#define NFS4_dec_open_downgrade_sz \
366 (compound_decode_hdr_maxsz + \
367 decode_sequence_maxsz + \
368 decode_putfh_maxsz + \
369 decode_open_downgrade_maxsz + \
370 decode_getattr_maxsz)
371#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
372 encode_sequence_maxsz + \
373 encode_putfh_maxsz + \
374 encode_close_maxsz + \
375 encode_getattr_maxsz)
376#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
377 decode_sequence_maxsz + \
378 decode_putfh_maxsz + \
379 decode_close_maxsz + \
380 decode_getattr_maxsz)
381#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
382 encode_sequence_maxsz + \
383 encode_putfh_maxsz + \
384 encode_setattr_maxsz + \
385 encode_getattr_maxsz)
386#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
387 decode_sequence_maxsz + \
388 decode_putfh_maxsz + \
389 decode_setattr_maxsz + \
390 decode_getattr_maxsz)
391#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
392 encode_sequence_maxsz + \
393 encode_putfh_maxsz + \
394 encode_fsinfo_maxsz)
395#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
396 decode_sequence_maxsz + \
397 decode_putfh_maxsz + \
398 decode_fsinfo_maxsz)
399#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
400 encode_renew_maxsz)
401#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
402 decode_renew_maxsz)
403#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
404 encode_setclientid_maxsz)
405#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
406 decode_setclientid_maxsz)
407#define NFS4_enc_setclientid_confirm_sz \
408 (compound_encode_hdr_maxsz + \
409 encode_setclientid_confirm_maxsz + \
410 encode_putrootfh_maxsz + \
411 encode_fsinfo_maxsz)
412#define NFS4_dec_setclientid_confirm_sz \
413 (compound_decode_hdr_maxsz + \
414 decode_setclientid_confirm_maxsz + \
415 decode_putrootfh_maxsz + \
416 decode_fsinfo_maxsz)
417#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
418 encode_sequence_maxsz + \
419 encode_putfh_maxsz + \
420 encode_lock_maxsz)
421#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
422 decode_sequence_maxsz + \
423 decode_putfh_maxsz + \
424 decode_lock_maxsz)
425#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_lockt_maxsz)
429#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_lockt_maxsz)
433#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
434 encode_sequence_maxsz + \
435 encode_putfh_maxsz + \
436 encode_locku_maxsz)
437#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
438 decode_sequence_maxsz + \
439 decode_putfh_maxsz + \
440 decode_locku_maxsz)
441#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_access_maxsz + \
445 encode_getattr_maxsz)
446#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
447 decode_sequence_maxsz + \
448 decode_putfh_maxsz + \
449 decode_access_maxsz + \
450 decode_getattr_maxsz)
451#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
452 encode_sequence_maxsz + \
453 encode_putfh_maxsz + \
454 encode_getattr_maxsz)
455#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
456 decode_sequence_maxsz + \
457 decode_putfh_maxsz + \
458 decode_getattr_maxsz)
459#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_lookup_maxsz + \
463 encode_getattr_maxsz + \
464 encode_getfh_maxsz)
465#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
466 decode_sequence_maxsz + \
467 decode_putfh_maxsz + \
468 decode_lookup_maxsz + \
469 decode_getattr_maxsz + \
470 decode_getfh_maxsz)
471#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
472 encode_sequence_maxsz + \
473 encode_putrootfh_maxsz + \
474 encode_getattr_maxsz + \
475 encode_getfh_maxsz)
476#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
477 decode_sequence_maxsz + \
478 decode_putrootfh_maxsz + \
479 decode_getattr_maxsz + \
480 decode_getfh_maxsz)
481#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
482 encode_sequence_maxsz + \
483 encode_putfh_maxsz + \
484 encode_remove_maxsz + \
485 encode_getattr_maxsz)
486#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
487 decode_sequence_maxsz + \
488 decode_putfh_maxsz + \
489 decode_remove_maxsz + \
490 decode_getattr_maxsz)
491#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
492 encode_sequence_maxsz + \
493 encode_putfh_maxsz + \
494 encode_savefh_maxsz + \
495 encode_putfh_maxsz + \
496 encode_rename_maxsz + \
497 encode_getattr_maxsz + \
498 encode_restorefh_maxsz + \
499 encode_getattr_maxsz)
500#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
501 decode_sequence_maxsz + \
502 decode_putfh_maxsz + \
503 decode_savefh_maxsz + \
504 decode_putfh_maxsz + \
505 decode_rename_maxsz + \
506 decode_getattr_maxsz + \
507 decode_restorefh_maxsz + \
508 decode_getattr_maxsz)
509#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
510 encode_sequence_maxsz + \
511 encode_putfh_maxsz + \
512 encode_savefh_maxsz + \
513 encode_putfh_maxsz + \
514 encode_link_maxsz + \
515 decode_getattr_maxsz + \
516 encode_restorefh_maxsz + \
517 decode_getattr_maxsz)
518#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
519 decode_sequence_maxsz + \
520 decode_putfh_maxsz + \
521 decode_savefh_maxsz + \
522 decode_putfh_maxsz + \
523 decode_link_maxsz + \
524 decode_getattr_maxsz + \
525 decode_restorefh_maxsz + \
526 decode_getattr_maxsz)
527#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_symlink_maxsz + \
531 encode_getattr_maxsz + \
532 encode_getfh_maxsz)
533#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
534 decode_sequence_maxsz + \
535 decode_putfh_maxsz + \
536 decode_symlink_maxsz + \
537 decode_getattr_maxsz + \
538 decode_getfh_maxsz)
539#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
540 encode_sequence_maxsz + \
541 encode_putfh_maxsz + \
542 encode_savefh_maxsz + \
543 encode_create_maxsz + \
544 encode_getfh_maxsz + \
545 encode_getattr_maxsz + \
546 encode_restorefh_maxsz + \
547 encode_getattr_maxsz)
548#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
549 decode_sequence_maxsz + \
550 decode_putfh_maxsz + \
551 decode_savefh_maxsz + \
552 decode_create_maxsz + \
553 decode_getfh_maxsz + \
554 decode_getattr_maxsz + \
555 decode_restorefh_maxsz + \
556 decode_getattr_maxsz)
557#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_getattr_maxsz)
561#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_getattr_maxsz)
565#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_statfs_maxsz)
569#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_statfs_maxsz)
573#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
574 encode_sequence_maxsz + \
575 encode_putfh_maxsz + \
576 encode_getattr_maxsz)
577#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
578 decode_sequence_maxsz + \
579 decode_putfh_maxsz + \
580 decode_getattr_maxsz)
581#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
582 encode_sequence_maxsz + \
583 encode_putfh_maxsz + \
584 encode_delegreturn_maxsz + \
585 encode_getattr_maxsz)
586#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
587 decode_sequence_maxsz + \
588 decode_delegreturn_maxsz + \
589 decode_getattr_maxsz)
590#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
591 encode_sequence_maxsz + \
592 encode_putfh_maxsz + \
593 encode_getacl_maxsz)
594#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_getacl_maxsz)
598#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
599 encode_sequence_maxsz + \
600 encode_putfh_maxsz + \
601 encode_setacl_maxsz)
602#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
603 decode_sequence_maxsz + \
604 decode_putfh_maxsz + \
605 decode_setacl_maxsz)
606#define NFS4_enc_fs_locations_sz \
607 (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_lookup_maxsz + \
611 encode_fs_locations_maxsz)
612#define NFS4_dec_fs_locations_sz \
613 (compound_decode_hdr_maxsz + \
614 decode_sequence_maxsz + \
615 decode_putfh_maxsz + \
616 decode_lookup_maxsz + \
617 decode_fs_locations_maxsz)
618#if defined(CONFIG_NFS_V4_1)
619#define NFS4_enc_exchange_id_sz \
620 (compound_encode_hdr_maxsz + \
621 encode_exchange_id_maxsz)
622#define NFS4_dec_exchange_id_sz \
623 (compound_decode_hdr_maxsz + \
624 decode_exchange_id_maxsz)
625#endif /* CONFIG_NFS_V4_1 */
626
627static const umode_t nfs_type2fmt[] = {
628 [NF4BAD] = 0,
629 [NF4REG] = S_IFREG,
630 [NF4DIR] = S_IFDIR,
631 [NF4BLK] = S_IFBLK,
632 [NF4CHR] = S_IFCHR,
633 [NF4LNK] = S_IFLNK,
634 [NF4SOCK] = S_IFSOCK,
635 [NF4FIFO] = S_IFIFO,
636 [NF4ATTRDIR] = 0,
637 [NF4NAMEDATTR] = 0,
638};
639
640struct compound_hdr {
641 int32_t status;
642 uint32_t nops;
643 __be32 * nops_p;
644 uint32_t taglen;
645 char * tag;
646 uint32_t replen; /* expected reply words */
647 u32 minorversion;
648};
649
650/*
651 * START OF "GENERIC" ENCODE ROUTINES.
652 * These may look a little ugly since they are imported from a "generic"
653 * set of XDR encode/decode routines which are intended to be shared by
654 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
655 *
656 * If the pain of reading these is too great, it should be a straightforward
657 * task to translate them into Linux-specific versions which are more
658 * consistent with the style used in NFSv2/v3...
659 */
660#define WRITE32(n) *p++ = htonl(n)
661#define WRITE64(n) do { \
662 *p++ = htonl((uint32_t)((n) >> 32)); \
663 *p++ = htonl((uint32_t)(n)); \
664} while (0)
665#define WRITEMEM(ptr,nbytes) do { \
666 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
667} while (0)
668
669#define RESERVE_SPACE(nbytes) do { \
670 p = xdr_reserve_space(xdr, nbytes); \
671 BUG_ON(!p); \
672} while (0)
673
674static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
675{
676 __be32 *p;
677
678 p = xdr_reserve_space(xdr, 4 + len);
679 BUG_ON(p == NULL);
680 xdr_encode_opaque(p, str, len);
681}
682
683static void encode_compound_hdr(struct xdr_stream *xdr,
684 struct rpc_rqst *req,
685 struct compound_hdr *hdr)
686{
687 __be32 *p;
688 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
689
690 /* initialize running count of expected bytes in reply.
691 * NOTE: the replied tag SHOULD be the same is the one sent,
692 * but this is not required as a MUST for the server to do so. */
693 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
694
695 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
696 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
697 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
698 WRITE32(hdr->taglen);
699 WRITEMEM(hdr->tag, hdr->taglen);
700 WRITE32(hdr->minorversion);
701 hdr->nops_p = p;
702 WRITE32(hdr->nops);
703}
704
705static void encode_nops(struct compound_hdr *hdr)
706{
707 *hdr->nops_p = htonl(hdr->nops);
708}
709
710static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
711{
712 __be32 *p;
713
714 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
715 BUG_ON(p == NULL);
716 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
717}
718
719static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
720{
721 char owner_name[IDMAP_NAMESZ];
722 char owner_group[IDMAP_NAMESZ];
723 int owner_namelen = 0;
724 int owner_grouplen = 0;
725 __be32 *p;
726 __be32 *q;
727 int len;
728 uint32_t bmval0 = 0;
729 uint32_t bmval1 = 0;
730
731 /*
732 * We reserve enough space to write the entire attribute buffer at once.
733 * In the worst-case, this would be
734 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
735 * = 36 bytes, plus any contribution from variable-length fields
736 * such as owner/group.
737 */
738 len = 16;
739
740 /* Sigh */
741 if (iap->ia_valid & ATTR_SIZE)
742 len += 8;
743 if (iap->ia_valid & ATTR_MODE)
744 len += 4;
745 if (iap->ia_valid & ATTR_UID) {
746 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
747 if (owner_namelen < 0) {
748 dprintk("nfs: couldn't resolve uid %d to string\n",
749 iap->ia_uid);
750 /* XXX */
751 strcpy(owner_name, "nobody");
752 owner_namelen = sizeof("nobody") - 1;
753 /* goto out; */
754 }
755 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
756 }
757 if (iap->ia_valid & ATTR_GID) {
758 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
759 if (owner_grouplen < 0) {
760 dprintk("nfs: couldn't resolve gid %d to string\n",
761 iap->ia_gid);
762 strcpy(owner_group, "nobody");
763 owner_grouplen = sizeof("nobody") - 1;
764 /* goto out; */
765 }
766 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
767 }
768 if (iap->ia_valid & ATTR_ATIME_SET)
769 len += 16;
770 else if (iap->ia_valid & ATTR_ATIME)
771 len += 4;
772 if (iap->ia_valid & ATTR_MTIME_SET)
773 len += 16;
774 else if (iap->ia_valid & ATTR_MTIME)
775 len += 4;
776 RESERVE_SPACE(len);
777
778 /*
779 * We write the bitmap length now, but leave the bitmap and the attribute
780 * buffer length to be backfilled at the end of this routine.
781 */
782 WRITE32(2);
783 q = p;
784 p += 3;
785
786 if (iap->ia_valid & ATTR_SIZE) {
787 bmval0 |= FATTR4_WORD0_SIZE;
788 WRITE64(iap->ia_size);
789 }
790 if (iap->ia_valid & ATTR_MODE) {
791 bmval1 |= FATTR4_WORD1_MODE;
792 WRITE32(iap->ia_mode & S_IALLUGO);
793 }
794 if (iap->ia_valid & ATTR_UID) {
795 bmval1 |= FATTR4_WORD1_OWNER;
796 WRITE32(owner_namelen);
797 WRITEMEM(owner_name, owner_namelen);
798 }
799 if (iap->ia_valid & ATTR_GID) {
800 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
801 WRITE32(owner_grouplen);
802 WRITEMEM(owner_group, owner_grouplen);
803 }
804 if (iap->ia_valid & ATTR_ATIME_SET) {
805 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
806 WRITE32(NFS4_SET_TO_CLIENT_TIME);
807 WRITE32(0);
808 WRITE32(iap->ia_mtime.tv_sec);
809 WRITE32(iap->ia_mtime.tv_nsec);
810 }
811 else if (iap->ia_valid & ATTR_ATIME) {
812 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
813 WRITE32(NFS4_SET_TO_SERVER_TIME);
814 }
815 if (iap->ia_valid & ATTR_MTIME_SET) {
816 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
817 WRITE32(NFS4_SET_TO_CLIENT_TIME);
818 WRITE32(0);
819 WRITE32(iap->ia_mtime.tv_sec);
820 WRITE32(iap->ia_mtime.tv_nsec);
821 }
822 else if (iap->ia_valid & ATTR_MTIME) {
823 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
824 WRITE32(NFS4_SET_TO_SERVER_TIME);
825 }
826
827 /*
828 * Now we backfill the bitmap and the attribute buffer length.
829 */
830 if (len != ((char *)p - (char *)q) + 4) {
831 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
832 len, ((char *)p - (char *)q) + 4);
833 BUG();
834 }
835 len = (char *)p - (char *)q - 12;
836 *q++ = htonl(bmval0);
837 *q++ = htonl(bmval1);
838 *q++ = htonl(len);
839
840/* out: */
841}
842
843static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
844{
845 __be32 *p;
846
847 RESERVE_SPACE(8);
848 WRITE32(OP_ACCESS);
849 WRITE32(access);
850 hdr->nops++;
851 hdr->replen += decode_access_maxsz;
852}
853
854static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
855{
856 __be32 *p;
857
858 RESERVE_SPACE(8+NFS4_STATEID_SIZE);
859 WRITE32(OP_CLOSE);
860 WRITE32(arg->seqid->sequence->counter);
861 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
862 hdr->nops++;
863 hdr->replen += decode_close_maxsz;
864}
865
866static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
867{
868 __be32 *p;
869
870 RESERVE_SPACE(16);
871 WRITE32(OP_COMMIT);
872 WRITE64(args->offset);
873 WRITE32(args->count);
874 hdr->nops++;
875 hdr->replen += decode_commit_maxsz;
876}
877
878static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
879{
880 __be32 *p;
881
882 RESERVE_SPACE(8);
883 WRITE32(OP_CREATE);
884 WRITE32(create->ftype);
885
886 switch (create->ftype) {
887 case NF4LNK:
888 RESERVE_SPACE(4);
889 WRITE32(create->u.symlink.len);
890 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
891 break;
892
893 case NF4BLK: case NF4CHR:
894 RESERVE_SPACE(8);
895 WRITE32(create->u.device.specdata1);
896 WRITE32(create->u.device.specdata2);
897 break;
898
899 default:
900 break;
901 }
902
903 RESERVE_SPACE(4 + create->name->len);
904 WRITE32(create->name->len);
905 WRITEMEM(create->name->name, create->name->len);
906 hdr->nops++;
907 hdr->replen += decode_create_maxsz;
908
909 encode_attrs(xdr, create->attrs, create->server);
910}
911
912static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
913{
914 __be32 *p;
915
916 RESERVE_SPACE(12);
917 WRITE32(OP_GETATTR);
918 WRITE32(1);
919 WRITE32(bitmap);
920 hdr->nops++;
921 hdr->replen += decode_getattr_maxsz;
922}
923
924static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
925{
926 __be32 *p;
927
928 RESERVE_SPACE(16);
929 WRITE32(OP_GETATTR);
930 WRITE32(2);
931 WRITE32(bm0);
932 WRITE32(bm1);
933 hdr->nops++;
934 hdr->replen += decode_getattr_maxsz;
935}
936
937static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
938{
939 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
940 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
941}
942
943static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
944{
945 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
946 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
947}
948
949static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
950{
951 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
952 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
953}
954
955static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
956{
957 __be32 *p;
958
959 RESERVE_SPACE(4);
960 WRITE32(OP_GETFH);
961 hdr->nops++;
962 hdr->replen += decode_getfh_maxsz;
963}
964
965static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
966{
967 __be32 *p;
968
969 RESERVE_SPACE(8 + name->len);
970 WRITE32(OP_LINK);
971 WRITE32(name->len);
972 WRITEMEM(name->name, name->len);
973 hdr->nops++;
974 hdr->replen += decode_link_maxsz;
975}
976
977static inline int nfs4_lock_type(struct file_lock *fl, int block)
978{
979 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
980 return block ? NFS4_READW_LT : NFS4_READ_LT;
981 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
982}
983
984static inline uint64_t nfs4_lock_length(struct file_lock *fl)
985{
986 if (fl->fl_end == OFFSET_MAX)
987 return ~(uint64_t)0;
988 return fl->fl_end - fl->fl_start + 1;
989}
990
991/*
992 * opcode,type,reclaim,offset,length,new_lock_owner = 32
993 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
994 */
995static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
996{
997 __be32 *p;
998
999 RESERVE_SPACE(32);
1000 WRITE32(OP_LOCK);
1001 WRITE32(nfs4_lock_type(args->fl, args->block));
1002 WRITE32(args->reclaim);
1003 WRITE64(args->fl->fl_start);
1004 WRITE64(nfs4_lock_length(args->fl));
1005 WRITE32(args->new_lock_owner);
1006 if (args->new_lock_owner){
1007 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1008 WRITE32(args->open_seqid->sequence->counter);
1009 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
1010 WRITE32(args->lock_seqid->sequence->counter);
1011 WRITE64(args->lock_owner.clientid);
1012 WRITE32(16);
1013 WRITEMEM("lock id:", 8);
1014 WRITE64(args->lock_owner.id);
1015 }
1016 else {
1017 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1018 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
1019 WRITE32(args->lock_seqid->sequence->counter);
1020 }
1021 hdr->nops++;
1022 hdr->replen += decode_lock_maxsz;
1023}
1024
1025static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1026{
1027 __be32 *p;
1028
1029 RESERVE_SPACE(52);
1030 WRITE32(OP_LOCKT);
1031 WRITE32(nfs4_lock_type(args->fl, 0));
1032 WRITE64(args->fl->fl_start);
1033 WRITE64(nfs4_lock_length(args->fl));
1034 WRITE64(args->lock_owner.clientid);
1035 WRITE32(16);
1036 WRITEMEM("lock id:", 8);
1037 WRITE64(args->lock_owner.id);
1038 hdr->nops++;
1039 hdr->replen += decode_lockt_maxsz;
1040}
1041
1042static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1043{
1044 __be32 *p;
1045
1046 RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1047 WRITE32(OP_LOCKU);
1048 WRITE32(nfs4_lock_type(args->fl, 0));
1049 WRITE32(args->seqid->sequence->counter);
1050 WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
1051 WRITE64(args->fl->fl_start);
1052 WRITE64(nfs4_lock_length(args->fl));
1053 hdr->nops++;
1054 hdr->replen += decode_locku_maxsz;
1055}
1056
1057static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1058{
1059 int len = name->len;
1060 __be32 *p;
1061
1062 RESERVE_SPACE(8 + len);
1063 WRITE32(OP_LOOKUP);
1064 WRITE32(len);
1065 WRITEMEM(name->name, len);
1066 hdr->nops++;
1067 hdr->replen += decode_lookup_maxsz;
1068}
1069
1070static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1071{
1072 __be32 *p;
1073
1074 RESERVE_SPACE(8);
1075 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1076 case FMODE_READ:
1077 WRITE32(NFS4_SHARE_ACCESS_READ);
1078 break;
1079 case FMODE_WRITE:
1080 WRITE32(NFS4_SHARE_ACCESS_WRITE);
1081 break;
1082 case FMODE_READ|FMODE_WRITE:
1083 WRITE32(NFS4_SHARE_ACCESS_BOTH);
1084 break;
1085 default:
1086 WRITE32(0);
1087 }
1088 WRITE32(0); /* for linux, share_deny = 0 always */
1089}
1090
1091static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1092{
1093 __be32 *p;
1094 /*
1095 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1096 * owner 4 = 32
1097 */
1098 RESERVE_SPACE(8);
1099 WRITE32(OP_OPEN);
1100 WRITE32(arg->seqid->sequence->counter);
1101 encode_share_access(xdr, arg->fmode);
1102 RESERVE_SPACE(28);
1103 WRITE64(arg->clientid);
1104 WRITE32(16);
1105 WRITEMEM("open id:", 8);
1106 WRITE64(arg->id);
1107}
1108
1109static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1110{
1111 __be32 *p;
1112
1113 RESERVE_SPACE(4);
1114 switch(arg->open_flags & O_EXCL) {
1115 case 0:
1116 WRITE32(NFS4_CREATE_UNCHECKED);
1117 encode_attrs(xdr, arg->u.attrs, arg->server);
1118 break;
1119 default:
1120 WRITE32(NFS4_CREATE_EXCLUSIVE);
1121 encode_nfs4_verifier(xdr, &arg->u.verifier);
1122 }
1123}
1124
1125static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1126{
1127 __be32 *p;
1128
1129 RESERVE_SPACE(4);
1130 switch (arg->open_flags & O_CREAT) {
1131 case 0:
1132 WRITE32(NFS4_OPEN_NOCREATE);
1133 break;
1134 default:
1135 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1136 WRITE32(NFS4_OPEN_CREATE);
1137 encode_createmode(xdr, arg);
1138 }
1139}
1140
1141static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1142{
1143 __be32 *p;
1144
1145 RESERVE_SPACE(4);
1146 switch (delegation_type) {
1147 case 0:
1148 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1149 break;
1150 case FMODE_READ:
1151 WRITE32(NFS4_OPEN_DELEGATE_READ);
1152 break;
1153 case FMODE_WRITE|FMODE_READ:
1154 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1155 break;
1156 default:
1157 BUG();
1158 }
1159}
1160
1161static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1162{
1163 __be32 *p;
1164
1165 RESERVE_SPACE(4);
1166 WRITE32(NFS4_OPEN_CLAIM_NULL);
1167 encode_string(xdr, name->len, name->name);
1168}
1169
1170static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1171{
1172 __be32 *p;
1173
1174 RESERVE_SPACE(4);
1175 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1176 encode_delegation_type(xdr, type);
1177}
1178
1179static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1180{
1181 __be32 *p;
1182
1183 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1184 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1185 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1186 encode_string(xdr, name->len, name->name);
1187}
1188
1189static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1190{
1191 encode_openhdr(xdr, arg);
1192 encode_opentype(xdr, arg);
1193 switch (arg->claim) {
1194 case NFS4_OPEN_CLAIM_NULL:
1195 encode_claim_null(xdr, arg->name);
1196 break;
1197 case NFS4_OPEN_CLAIM_PREVIOUS:
1198 encode_claim_previous(xdr, arg->u.delegation_type);
1199 break;
1200 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1201 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1202 break;
1203 default:
1204 BUG();
1205 }
1206 hdr->nops++;
1207 hdr->replen += decode_open_maxsz;
1208}
1209
1210static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1211{
1212 __be32 *p;
1213
1214 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1215 WRITE32(OP_OPEN_CONFIRM);
1216 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1217 WRITE32(arg->seqid->sequence->counter);
1218 hdr->nops++;
1219 hdr->replen += decode_open_confirm_maxsz;
1220}
1221
1222static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1223{
1224 __be32 *p;
1225
1226 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1227 WRITE32(OP_OPEN_DOWNGRADE);
1228 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1229 WRITE32(arg->seqid->sequence->counter);
1230 encode_share_access(xdr, arg->fmode);
1231 hdr->nops++;
1232 hdr->replen += decode_open_downgrade_maxsz;
1233}
1234
1235static void
1236encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1237{
1238 int len = fh->size;
1239 __be32 *p;
1240
1241 RESERVE_SPACE(8 + len);
1242 WRITE32(OP_PUTFH);
1243 WRITE32(len);
1244 WRITEMEM(fh->data, len);
1245 hdr->nops++;
1246 hdr->replen += decode_putfh_maxsz;
1247}
1248
1249static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1250{
1251 __be32 *p;
1252
1253 RESERVE_SPACE(4);
1254 WRITE32(OP_PUTROOTFH);
1255 hdr->nops++;
1256 hdr->replen += decode_putrootfh_maxsz;
1257}
1258
1259static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1260{
1261 nfs4_stateid stateid;
1262 __be32 *p;
1263
1264 RESERVE_SPACE(NFS4_STATEID_SIZE);
1265 if (ctx->state != NULL) {
1266 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1267 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1268 } else
1269 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1270}
1271
1272static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1273{
1274 __be32 *p;
1275
1276 RESERVE_SPACE(4);
1277 WRITE32(OP_READ);
1278
1279 encode_stateid(xdr, args->context);
1280
1281 RESERVE_SPACE(12);
1282 WRITE64(args->offset);
1283 WRITE32(args->count);
1284 hdr->nops++;
1285 hdr->replen += decode_read_maxsz;
1286}
1287
1288static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1289{
1290 uint32_t attrs[2] = {
1291 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1292 FATTR4_WORD1_MOUNTED_ON_FILEID,
1293 };
1294 __be32 *p;
1295
1296 RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1297 WRITE32(OP_READDIR);
1298 WRITE64(readdir->cookie);
1299 WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1300 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1301 WRITE32(readdir->count);
1302 WRITE32(2);
1303 /* Switch to mounted_on_fileid if the server supports it */
1304 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1305 attrs[0] &= ~FATTR4_WORD0_FILEID;
1306 else
1307 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1308 WRITE32(attrs[0] & readdir->bitmask[0]);
1309 WRITE32(attrs[1] & readdir->bitmask[1]);
1310 hdr->nops++;
1311 hdr->replen += decode_readdir_maxsz;
1312 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1313 __func__,
1314 (unsigned long long)readdir->cookie,
1315 ((u32 *)readdir->verifier.data)[0],
1316 ((u32 *)readdir->verifier.data)[1],
1317 attrs[0] & readdir->bitmask[0],
1318 attrs[1] & readdir->bitmask[1]);
1319}
1320
1321static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1322{
1323 __be32 *p;
1324
1325 RESERVE_SPACE(4);
1326 WRITE32(OP_READLINK);
1327 hdr->nops++;
1328 hdr->replen += decode_readlink_maxsz;
1329}
1330
1331static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1332{
1333 __be32 *p;
1334
1335 RESERVE_SPACE(8 + name->len);
1336 WRITE32(OP_REMOVE);
1337 WRITE32(name->len);
1338 WRITEMEM(name->name, name->len);
1339 hdr->nops++;
1340 hdr->replen += decode_remove_maxsz;
1341}
1342
1343static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1344{
1345 __be32 *p;
1346
1347 RESERVE_SPACE(8 + oldname->len);
1348 WRITE32(OP_RENAME);
1349 WRITE32(oldname->len);
1350 WRITEMEM(oldname->name, oldname->len);
1351
1352 RESERVE_SPACE(4 + newname->len);
1353 WRITE32(newname->len);
1354 WRITEMEM(newname->name, newname->len);
1355 hdr->nops++;
1356 hdr->replen += decode_rename_maxsz;
1357}
1358
1359static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1360{
1361 __be32 *p;
1362
1363 RESERVE_SPACE(12);
1364 WRITE32(OP_RENEW);
1365 WRITE64(client_stateid->cl_clientid);
1366 hdr->nops++;
1367 hdr->replen += decode_renew_maxsz;
1368}
1369
1370static void
1371encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1372{
1373 __be32 *p;
1374
1375 RESERVE_SPACE(4);
1376 WRITE32(OP_RESTOREFH);
1377 hdr->nops++;
1378 hdr->replen += decode_restorefh_maxsz;
1379}
1380
1381static int
1382encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1383{
1384 __be32 *p;
1385
1386 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1387 WRITE32(OP_SETATTR);
1388 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1389 RESERVE_SPACE(2*4);
1390 WRITE32(1);
1391 WRITE32(FATTR4_WORD0_ACL);
1392 if (arg->acl_len % 4)
1393 return -EINVAL;
1394 RESERVE_SPACE(4);
1395 WRITE32(arg->acl_len);
1396 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1397 hdr->nops++;
1398 hdr->replen += decode_setacl_maxsz;
1399 return 0;
1400}
1401
1402static void
1403encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1404{
1405 __be32 *p;
1406
1407 RESERVE_SPACE(4);
1408 WRITE32(OP_SAVEFH);
1409 hdr->nops++;
1410 hdr->replen += decode_savefh_maxsz;
1411}
1412
1413static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1414{
1415 __be32 *p;
1416
1417 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1418 WRITE32(OP_SETATTR);
1419 WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1420 hdr->nops++;
1421 hdr->replen += decode_setattr_maxsz;
1422 encode_attrs(xdr, arg->iap, server);
1423}
1424
1425static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1426{
1427 __be32 *p;
1428
1429 RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1430 WRITE32(OP_SETCLIENTID);
1431 WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1432
1433 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1434 RESERVE_SPACE(4);
1435 WRITE32(setclientid->sc_prog);
1436 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1437 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1438 RESERVE_SPACE(4);
1439 WRITE32(setclientid->sc_cb_ident);
1440 hdr->nops++;
1441 hdr->replen += decode_setclientid_maxsz;
1442}
1443
1444static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1445{
1446 __be32 *p;
1447
1448 RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1449 WRITE32(OP_SETCLIENTID_CONFIRM);
1450 WRITE64(client_state->cl_clientid);
1451 WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1452 hdr->nops++;
1453 hdr->replen += decode_setclientid_confirm_maxsz;
1454}
1455
1456static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1457{
1458 __be32 *p;
1459
1460 RESERVE_SPACE(4);
1461 WRITE32(OP_WRITE);
1462
1463 encode_stateid(xdr, args->context);
1464
1465 RESERVE_SPACE(16);
1466 WRITE64(args->offset);
1467 WRITE32(args->stable);
1468 WRITE32(args->count);
1469
1470 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1471 hdr->nops++;
1472 hdr->replen += decode_write_maxsz;
1473}
1474
1475static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1476{
1477 __be32 *p;
1478
1479 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1480
1481 WRITE32(OP_DELEGRETURN);
1482 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1483 hdr->nops++;
1484 hdr->replen += decode_delegreturn_maxsz;
1485}
1486
1487#if defined(CONFIG_NFS_V4_1)
1488/* NFSv4.1 operations */
1489static void encode_exchange_id(struct xdr_stream *xdr,
1490 struct nfs41_exchange_id_args *args,
1491 struct compound_hdr *hdr)
1492{
1493 __be32 *p;
1494
1495 RESERVE_SPACE(4 + sizeof(args->verifier->data));
1496 WRITE32(OP_EXCHANGE_ID);
1497 WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
1498
1499 encode_string(xdr, args->id_len, args->id);
1500
1501 RESERVE_SPACE(12);
1502 WRITE32(args->flags);
1503 WRITE32(0); /* zero length state_protect4_a */
1504 WRITE32(0); /* zero length implementation id array */
1505 hdr->nops++;
1506 hdr->replen += decode_exchange_id_maxsz;
1507}
1508#endif /* CONFIG_NFS_V4_1 */
1509
1510static void encode_sequence(struct xdr_stream *xdr,
1511 const struct nfs4_sequence_args *args,
1512 struct compound_hdr *hdr)
1513{
1514#if defined(CONFIG_NFS_V4_1)
1515 struct nfs4_session *session = args->sa_session;
1516
1517 if (!session)
1518 return;
1519
1520 /* stub */
1521 hdr->nops++;
1522 hdr->replen += decode_sequence_maxsz;
1523#endif /* CONFIG_NFS_V4_1 */
1524}
1525
1526/*
1527 * END OF "GENERIC" ENCODE ROUTINES.
1528 */
1529
1530static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1531{
1532#if defined(CONFIG_NFS_V4_1)
1533 if (args->sa_session)
1534 return args->sa_session->clp->cl_minorversion;
1535#endif /* CONFIG_NFS_V4_1 */
1536 return 0;
1537}
1538
1539/*
1540 * Encode an ACCESS request
1541 */
1542static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1543{
1544 struct xdr_stream xdr;
1545 struct compound_hdr hdr = {
1546 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1547 };
1548
1549 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1550 encode_compound_hdr(&xdr, req, &hdr);
1551 encode_sequence(&xdr, &args->seq_args, &hdr);
1552 encode_putfh(&xdr, args->fh, &hdr);
1553 encode_access(&xdr, args->access, &hdr);
1554 encode_getfattr(&xdr, args->bitmask, &hdr);
1555 encode_nops(&hdr);
1556 return 0;
1557}
1558
1559/*
1560 * Encode LOOKUP request
1561 */
1562static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1563{
1564 struct xdr_stream xdr;
1565 struct compound_hdr hdr = {
1566 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1567 };
1568
1569 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1570 encode_compound_hdr(&xdr, req, &hdr);
1571 encode_sequence(&xdr, &args->seq_args, &hdr);
1572 encode_putfh(&xdr, args->dir_fh, &hdr);
1573 encode_lookup(&xdr, args->name, &hdr);
1574 encode_getfh(&xdr, &hdr);
1575 encode_getfattr(&xdr, args->bitmask, &hdr);
1576 encode_nops(&hdr);
1577 return 0;
1578}
1579
1580/*
1581 * Encode LOOKUP_ROOT request
1582 */
1583static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1584{
1585 struct xdr_stream xdr;
1586 struct compound_hdr hdr = {
1587 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1588 };
1589
1590 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1591 encode_compound_hdr(&xdr, req, &hdr);
1592 encode_sequence(&xdr, &args->seq_args, &hdr);
1593 encode_putrootfh(&xdr, &hdr);
1594 encode_getfh(&xdr, &hdr);
1595 encode_getfattr(&xdr, args->bitmask, &hdr);
1596 encode_nops(&hdr);
1597 return 0;
1598}
1599
1600/*
1601 * Encode REMOVE request
1602 */
1603static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1604{
1605 struct xdr_stream xdr;
1606 struct compound_hdr hdr = {
1607 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1608 };
1609
1610 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1611 encode_compound_hdr(&xdr, req, &hdr);
1612 encode_sequence(&xdr, &args->seq_args, &hdr);
1613 encode_putfh(&xdr, args->fh, &hdr);
1614 encode_remove(&xdr, &args->name, &hdr);
1615 encode_getfattr(&xdr, args->bitmask, &hdr);
1616 encode_nops(&hdr);
1617 return 0;
1618}
1619
1620/*
1621 * Encode RENAME request
1622 */
1623static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1624{
1625 struct xdr_stream xdr;
1626 struct compound_hdr hdr = {
1627 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1628 };
1629
1630 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1631 encode_compound_hdr(&xdr, req, &hdr);
1632 encode_sequence(&xdr, &args->seq_args, &hdr);
1633 encode_putfh(&xdr, args->old_dir, &hdr);
1634 encode_savefh(&xdr, &hdr);
1635 encode_putfh(&xdr, args->new_dir, &hdr);
1636 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1637 encode_getfattr(&xdr, args->bitmask, &hdr);
1638 encode_restorefh(&xdr, &hdr);
1639 encode_getfattr(&xdr, args->bitmask, &hdr);
1640 encode_nops(&hdr);
1641 return 0;
1642}
1643
1644/*
1645 * Encode LINK request
1646 */
1647static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1648{
1649 struct xdr_stream xdr;
1650 struct compound_hdr hdr = {
1651 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1652 };
1653
1654 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1655 encode_compound_hdr(&xdr, req, &hdr);
1656 encode_sequence(&xdr, &args->seq_args, &hdr);
1657 encode_putfh(&xdr, args->fh, &hdr);
1658 encode_savefh(&xdr, &hdr);
1659 encode_putfh(&xdr, args->dir_fh, &hdr);
1660 encode_link(&xdr, args->name, &hdr);
1661 encode_getfattr(&xdr, args->bitmask, &hdr);
1662 encode_restorefh(&xdr, &hdr);
1663 encode_getfattr(&xdr, args->bitmask, &hdr);
1664 encode_nops(&hdr);
1665 return 0;
1666}
1667
1668/*
1669 * Encode CREATE request
1670 */
1671static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1672{
1673 struct xdr_stream xdr;
1674 struct compound_hdr hdr = {
1675 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1676 };
1677
1678 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1679 encode_compound_hdr(&xdr, req, &hdr);
1680 encode_sequence(&xdr, &args->seq_args, &hdr);
1681 encode_putfh(&xdr, args->dir_fh, &hdr);
1682 encode_savefh(&xdr, &hdr);
1683 encode_create(&xdr, args, &hdr);
1684 encode_getfh(&xdr, &hdr);
1685 encode_getfattr(&xdr, args->bitmask, &hdr);
1686 encode_restorefh(&xdr, &hdr);
1687 encode_getfattr(&xdr, args->bitmask, &hdr);
1688 encode_nops(&hdr);
1689 return 0;
1690}
1691
1692/*
1693 * Encode SYMLINK request
1694 */
1695static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1696{
1697 return nfs4_xdr_enc_create(req, p, args);
1698}
1699
1700/*
1701 * Encode GETATTR request
1702 */
1703static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1704{
1705 struct xdr_stream xdr;
1706 struct compound_hdr hdr = {
1707 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1708 };
1709
1710 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1711 encode_compound_hdr(&xdr, req, &hdr);
1712 encode_sequence(&xdr, &args->seq_args, &hdr);
1713 encode_putfh(&xdr, args->fh, &hdr);
1714 encode_getfattr(&xdr, args->bitmask, &hdr);
1715 encode_nops(&hdr);
1716 return 0;
1717}
1718
1719/*
1720 * Encode a CLOSE request
1721 */
1722static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1723{
1724 struct xdr_stream xdr;
1725 struct compound_hdr hdr = {
1726 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1727 };
1728
1729 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1730 encode_compound_hdr(&xdr, req, &hdr);
1731 encode_sequence(&xdr, &args->seq_args, &hdr);
1732 encode_putfh(&xdr, args->fh, &hdr);
1733 encode_close(&xdr, args, &hdr);
1734 encode_getfattr(&xdr, args->bitmask, &hdr);
1735 encode_nops(&hdr);
1736 return 0;
1737}
1738
1739/*
1740 * Encode an OPEN request
1741 */
1742static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1743{
1744 struct xdr_stream xdr;
1745 struct compound_hdr hdr = {
1746 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1747 };
1748
1749 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1750 encode_compound_hdr(&xdr, req, &hdr);
1751 encode_sequence(&xdr, &args->seq_args, &hdr);
1752 encode_putfh(&xdr, args->fh, &hdr);
1753 encode_savefh(&xdr, &hdr);
1754 encode_open(&xdr, args, &hdr);
1755 encode_getfh(&xdr, &hdr);
1756 encode_getfattr(&xdr, args->bitmask, &hdr);
1757 encode_restorefh(&xdr, &hdr);
1758 encode_getfattr(&xdr, args->bitmask, &hdr);
1759 encode_nops(&hdr);
1760 return 0;
1761}
1762
1763/*
1764 * Encode an OPEN_CONFIRM request
1765 */
1766static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1767{
1768 struct xdr_stream xdr;
1769 struct compound_hdr hdr = {
1770 .nops = 0,
1771 };
1772
1773 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1774 encode_compound_hdr(&xdr, req, &hdr);
1775 encode_putfh(&xdr, args->fh, &hdr);
1776 encode_open_confirm(&xdr, args, &hdr);
1777 encode_nops(&hdr);
1778 return 0;
1779}
1780
1781/*
1782 * Encode an OPEN request with no attributes.
1783 */
1784static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1785{
1786 struct xdr_stream xdr;
1787 struct compound_hdr hdr = {
1788 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1789 };
1790
1791 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1792 encode_compound_hdr(&xdr, req, &hdr);
1793 encode_sequence(&xdr, &args->seq_args, &hdr);
1794 encode_putfh(&xdr, args->fh, &hdr);
1795 encode_open(&xdr, args, &hdr);
1796 encode_getfattr(&xdr, args->bitmask, &hdr);
1797 encode_nops(&hdr);
1798 return 0;
1799}
1800
1801/*
1802 * Encode an OPEN_DOWNGRADE request
1803 */
1804static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1805{
1806 struct xdr_stream xdr;
1807 struct compound_hdr hdr = {
1808 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1809 };
1810
1811 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1812 encode_compound_hdr(&xdr, req, &hdr);
1813 encode_sequence(&xdr, &args->seq_args, &hdr);
1814 encode_putfh(&xdr, args->fh, &hdr);
1815 encode_open_downgrade(&xdr, args, &hdr);
1816 encode_getfattr(&xdr, args->bitmask, &hdr);
1817 encode_nops(&hdr);
1818 return 0;
1819}
1820
1821/*
1822 * Encode a LOCK request
1823 */
1824static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1825{
1826 struct xdr_stream xdr;
1827 struct compound_hdr hdr = {
1828 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1829 };
1830
1831 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1832 encode_compound_hdr(&xdr, req, &hdr);
1833 encode_sequence(&xdr, &args->seq_args, &hdr);
1834 encode_putfh(&xdr, args->fh, &hdr);
1835 encode_lock(&xdr, args, &hdr);
1836 encode_nops(&hdr);
1837 return 0;
1838}
1839
1840/*
1841 * Encode a LOCKT request
1842 */
1843static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1844{
1845 struct xdr_stream xdr;
1846 struct compound_hdr hdr = {
1847 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1848 };
1849
1850 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1851 encode_compound_hdr(&xdr, req, &hdr);
1852 encode_sequence(&xdr, &args->seq_args, &hdr);
1853 encode_putfh(&xdr, args->fh, &hdr);
1854 encode_lockt(&xdr, args, &hdr);
1855 encode_nops(&hdr);
1856 return 0;
1857}
1858
1859/*
1860 * Encode a LOCKU request
1861 */
1862static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1863{
1864 struct xdr_stream xdr;
1865 struct compound_hdr hdr = {
1866 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1867 };
1868
1869 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1870 encode_compound_hdr(&xdr, req, &hdr);
1871 encode_sequence(&xdr, &args->seq_args, &hdr);
1872 encode_putfh(&xdr, args->fh, &hdr);
1873 encode_locku(&xdr, args, &hdr);
1874 encode_nops(&hdr);
1875 return 0;
1876}
1877
1878/*
1879 * Encode a READLINK request
1880 */
1881static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1882{
1883 struct xdr_stream xdr;
1884 struct compound_hdr hdr = {
1885 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1886 };
1887
1888 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1889 encode_compound_hdr(&xdr, req, &hdr);
1890 encode_sequence(&xdr, &args->seq_args, &hdr);
1891 encode_putfh(&xdr, args->fh, &hdr);
1892 encode_readlink(&xdr, args, req, &hdr);
1893
1894 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
1895 args->pgbase, args->pglen);
1896 encode_nops(&hdr);
1897 return 0;
1898}
1899
1900/*
1901 * Encode a READDIR request
1902 */
1903static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1904{
1905 struct xdr_stream xdr;
1906 struct compound_hdr hdr = {
1907 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1908 };
1909
1910 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911 encode_compound_hdr(&xdr, req, &hdr);
1912 encode_sequence(&xdr, &args->seq_args, &hdr);
1913 encode_putfh(&xdr, args->fh, &hdr);
1914 encode_readdir(&xdr, args, req, &hdr);
1915
1916 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
1917 args->pgbase, args->count);
1918 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1919 __func__, hdr.replen << 2, args->pages,
1920 args->pgbase, args->count);
1921 encode_nops(&hdr);
1922 return 0;
1923}
1924
1925/*
1926 * Encode a READ request
1927 */
1928static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1929{
1930 struct xdr_stream xdr;
1931 struct compound_hdr hdr = {
1932 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1933 };
1934
1935 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1936 encode_compound_hdr(&xdr, req, &hdr);
1937 encode_sequence(&xdr, &args->seq_args, &hdr);
1938 encode_putfh(&xdr, args->fh, &hdr);
1939 encode_read(&xdr, args, &hdr);
1940
1941 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
1942 args->pages, args->pgbase, args->count);
1943 req->rq_rcv_buf.flags |= XDRBUF_READ;
1944 encode_nops(&hdr);
1945 return 0;
1946}
1947
1948/*
1949 * Encode an SETATTR request
1950 */
1951static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1952{
1953 struct xdr_stream xdr;
1954 struct compound_hdr hdr = {
1955 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1956 };
1957
1958 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1959 encode_compound_hdr(&xdr, req, &hdr);
1960 encode_sequence(&xdr, &args->seq_args, &hdr);
1961 encode_putfh(&xdr, args->fh, &hdr);
1962 encode_setattr(&xdr, args, args->server, &hdr);
1963 encode_getfattr(&xdr, args->bitmask, &hdr);
1964 encode_nops(&hdr);
1965 return 0;
1966}
1967
1968/*
1969 * Encode a GETACL request
1970 */
1971static int
1972nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1973 struct nfs_getaclargs *args)
1974{
1975 struct xdr_stream xdr;
1976 struct compound_hdr hdr = {
1977 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1978 };
1979 uint32_t replen;
1980
1981 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1982 encode_compound_hdr(&xdr, req, &hdr);
1983 encode_sequence(&xdr, &args->seq_args, &hdr);
1984 encode_putfh(&xdr, args->fh, &hdr);
1985 replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
1986 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1987
1988 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
1989 args->acl_pages, args->acl_pgbase, args->acl_len);
1990 encode_nops(&hdr);
1991 return 0;
1992}
1993
1994/*
1995 * Encode a WRITE request
1996 */
1997static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1998{
1999 struct xdr_stream xdr;
2000 struct compound_hdr hdr = {
2001 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2002 };
2003
2004 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2005 encode_compound_hdr(&xdr, req, &hdr);
2006 encode_sequence(&xdr, &args->seq_args, &hdr);
2007 encode_putfh(&xdr, args->fh, &hdr);
2008 encode_write(&xdr, args, &hdr);
2009 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2010 encode_getfattr(&xdr, args->bitmask, &hdr);
2011 encode_nops(&hdr);
2012 return 0;
2013}
2014
2015/*
2016 * a COMMIT request
2017 */
2018static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2019{
2020 struct xdr_stream xdr;
2021 struct compound_hdr hdr = {
2022 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023 };
2024
2025 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026 encode_compound_hdr(&xdr, req, &hdr);
2027 encode_sequence(&xdr, &args->seq_args, &hdr);
2028 encode_putfh(&xdr, args->fh, &hdr);
2029 encode_commit(&xdr, args, &hdr);
2030 encode_getfattr(&xdr, args->bitmask, &hdr);
2031 encode_nops(&hdr);
2032 return 0;
2033}
2034
2035/*
2036 * FSINFO request
2037 */
2038static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2039{
2040 struct xdr_stream xdr;
2041 struct compound_hdr hdr = {
2042 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2043 };
2044
2045 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2046 encode_compound_hdr(&xdr, req, &hdr);
2047 encode_sequence(&xdr, &args->seq_args, &hdr);
2048 encode_putfh(&xdr, args->fh, &hdr);
2049 encode_fsinfo(&xdr, args->bitmask, &hdr);
2050 encode_nops(&hdr);
2051 return 0;
2052}
2053
2054/*
2055 * a PATHCONF request
2056 */
2057static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2058{
2059 struct xdr_stream xdr;
2060 struct compound_hdr hdr = {
2061 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062 };
2063
2064 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2065 encode_compound_hdr(&xdr, req, &hdr);
2066 encode_sequence(&xdr, &args->seq_args, &hdr);
2067 encode_putfh(&xdr, args->fh, &hdr);
2068 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2069 &hdr);
2070 encode_nops(&hdr);
2071 return 0;
2072}
2073
2074/*
2075 * a STATFS request
2076 */
2077static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2078{
2079 struct xdr_stream xdr;
2080 struct compound_hdr hdr = {
2081 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082 };
2083
2084 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2085 encode_compound_hdr(&xdr, req, &hdr);
2086 encode_sequence(&xdr, &args->seq_args, &hdr);
2087 encode_putfh(&xdr, args->fh, &hdr);
2088 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2089 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2090 encode_nops(&hdr);
2091 return 0;
2092}
2093
2094/*
2095 * GETATTR_BITMAP request
2096 */
2097static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2098 struct nfs4_server_caps_arg *args)
2099{
2100 struct xdr_stream xdr;
2101 struct compound_hdr hdr = {
2102 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2103 };
2104
2105 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2106 encode_compound_hdr(&xdr, req, &hdr);
2107 encode_sequence(&xdr, &args->seq_args, &hdr);
2108 encode_putfh(&xdr, args->fhandle, &hdr);
2109 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2110 FATTR4_WORD0_LINK_SUPPORT|
2111 FATTR4_WORD0_SYMLINK_SUPPORT|
2112 FATTR4_WORD0_ACLSUPPORT, &hdr);
2113 encode_nops(&hdr);
2114 return 0;
2115}
2116
2117/*
2118 * a RENEW request
2119 */
2120static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2121{
2122 struct xdr_stream xdr;
2123 struct compound_hdr hdr = {
2124 .nops = 0,
2125 };
2126
2127 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2128 encode_compound_hdr(&xdr, req, &hdr);
2129 encode_renew(&xdr, clp, &hdr);
2130 encode_nops(&hdr);
2131 return 0;
2132}
2133
2134/*
2135 * a SETCLIENTID request
2136 */
2137static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2138{
2139 struct xdr_stream xdr;
2140 struct compound_hdr hdr = {
2141 .nops = 0,
2142 };
2143
2144 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2145 encode_compound_hdr(&xdr, req, &hdr);
2146 encode_setclientid(&xdr, sc, &hdr);
2147 encode_nops(&hdr);
2148 return 0;
2149}
2150
2151/*
2152 * a SETCLIENTID_CONFIRM request
2153 */
2154static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2155{
2156 struct xdr_stream xdr;
2157 struct compound_hdr hdr = {
2158 .nops = 0,
2159 };
2160 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2161
2162 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2163 encode_compound_hdr(&xdr, req, &hdr);
2164 encode_setclientid_confirm(&xdr, clp, &hdr);
2165 encode_putrootfh(&xdr, &hdr);
2166 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2167 encode_nops(&hdr);
2168 return 0;
2169}
2170
2171/*
2172 * DELEGRETURN request
2173 */
2174static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2175{
2176 struct xdr_stream xdr;
2177 struct compound_hdr hdr = {
2178 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2179 };
2180
2181 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2182 encode_compound_hdr(&xdr, req, &hdr);
2183 encode_sequence(&xdr, &args->seq_args, &hdr);
2184 encode_putfh(&xdr, args->fhandle, &hdr);
2185 encode_delegreturn(&xdr, args->stateid, &hdr);
2186 encode_getfattr(&xdr, args->bitmask, &hdr);
2187 encode_nops(&hdr);
2188 return 0;
2189}
2190
2191/*
2192 * Encode FS_LOCATIONS request
2193 */
2194static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2195{
2196 struct xdr_stream xdr;
2197 struct compound_hdr hdr = {
2198 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199 };
2200 uint32_t replen;
2201
2202 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2203 encode_compound_hdr(&xdr, req, &hdr);
2204 encode_sequence(&xdr, &args->seq_args, &hdr);
2205 encode_putfh(&xdr, args->dir_fh, &hdr);
2206 encode_lookup(&xdr, args->name, &hdr);
2207 replen = hdr.replen; /* get the attribute into args->page */
2208 encode_fs_locations(&xdr, args->bitmask, &hdr);
2209
2210 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2211 0, PAGE_SIZE);
2212 encode_nops(&hdr);
2213 return 0;
2214}
2215
2216#if defined(CONFIG_NFS_V4_1)
2217/*
2218 * EXCHANGE_ID request
2219 */
2220static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2221 struct nfs41_exchange_id_args *args)
2222{
2223 struct xdr_stream xdr;
2224 struct compound_hdr hdr = {
2225 .minorversion = args->client->cl_minorversion,
2226 };
2227
2228 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2229 encode_compound_hdr(&xdr, req, &hdr);
2230 encode_exchange_id(&xdr, args, &hdr);
2231 encode_nops(&hdr);
2232 return 0;
2233}
2234#endif /* CONFIG_NFS_V4_1 */
2235
2236/*
2237 * START OF "GENERIC" DECODE ROUTINES.
2238 * These may look a little ugly since they are imported from a "generic"
2239 * set of XDR encode/decode routines which are intended to be shared by
2240 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2241 *
2242 * If the pain of reading these is too great, it should be a straightforward
2243 * task to translate them into Linux-specific versions which are more
2244 * consistent with the style used in NFSv2/v3...
2245 */
2246#define READ32(x) (x) = ntohl(*p++)
2247#define READ64(x) do { \
2248 (x) = (u64)ntohl(*p++) << 32; \
2249 (x) |= ntohl(*p++); \
2250} while (0)
2251#define READTIME(x) do { \
2252 p++; \
2253 (x.tv_sec) = ntohl(*p++); \
2254 (x.tv_nsec) = ntohl(*p++); \
2255} while (0)
2256#define COPYMEM(x,nbytes) do { \
2257 memcpy((x), p, nbytes); \
2258 p += XDR_QUADLEN(nbytes); \
2259} while (0)
2260
2261#define READ_BUF(nbytes) do { \
2262 p = xdr_inline_decode(xdr, nbytes); \
2263 if (unlikely(!p)) { \
2264 dprintk("nfs: %s: prematurely hit end of receive" \
2265 " buffer\n", __func__); \
2266 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2267 __func__, xdr->p, nbytes, xdr->end); \
2268 return -EIO; \
2269 } \
2270} while (0)
2271
2272static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2273{
2274 __be32 *p;
2275
2276 READ_BUF(4);
2277 READ32(*len);
2278 READ_BUF(*len);
2279 *string = (char *)p;
2280 return 0;
2281}
2282
2283static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2284{
2285 __be32 *p;
2286
2287 READ_BUF(8);
2288 READ32(hdr->status);
2289 READ32(hdr->taglen);
2290
2291 READ_BUF(hdr->taglen + 4);
2292 hdr->tag = (char *)p;
2293 p += XDR_QUADLEN(hdr->taglen);
2294 READ32(hdr->nops);
2295 if (unlikely(hdr->nops < 1))
2296 return nfs4_stat_to_errno(hdr->status);
2297 return 0;
2298}
2299
2300static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2301{
2302 __be32 *p;
2303 uint32_t opnum;
2304 int32_t nfserr;
2305
2306 READ_BUF(8);
2307 READ32(opnum);
2308 if (opnum != expected) {
2309 dprintk("nfs: Server returned operation"
2310 " %d but we issued a request for %d\n",
2311 opnum, expected);
2312 return -EIO;
2313 }
2314 READ32(nfserr);
2315 if (nfserr != NFS_OK)
2316 return nfs4_stat_to_errno(nfserr);
2317 return 0;
2318}
2319
2320/* Dummy routine */
2321static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2322{
2323 __be32 *p;
2324 unsigned int strlen;
2325 char *str;
2326
2327 READ_BUF(12);
2328 return decode_opaque_inline(xdr, &strlen, &str);
2329}
2330
2331static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2332{
2333 uint32_t bmlen;
2334 __be32 *p;
2335
2336 READ_BUF(4);
2337 READ32(bmlen);
2338
2339 bitmap[0] = bitmap[1] = 0;
2340 READ_BUF((bmlen << 2));
2341 if (bmlen > 0) {
2342 READ32(bitmap[0]);
2343 if (bmlen > 1)
2344 READ32(bitmap[1]);
2345 }
2346 return 0;
2347}
2348
2349static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2350{
2351 __be32 *p;
2352
2353 READ_BUF(4);
2354 READ32(*attrlen);
2355 *savep = xdr->p;
2356 return 0;
2357}
2358
2359static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2360{
2361 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2362 decode_attr_bitmap(xdr, bitmask);
2363 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2364 } else
2365 bitmask[0] = bitmask[1] = 0;
2366 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2367 return 0;
2368}
2369
2370static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2371{
2372 __be32 *p;
2373 int ret = 0;
2374
2375 *type = 0;
2376 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2377 return -EIO;
2378 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2379 READ_BUF(4);
2380 READ32(*type);
2381 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2382 dprintk("%s: bad type %d\n", __func__, *type);
2383 return -EIO;
2384 }
2385 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2386 ret = NFS_ATTR_FATTR_TYPE;
2387 }
2388 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2389 return ret;
2390}
2391
2392static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2393{
2394 __be32 *p;
2395 int ret = 0;
2396
2397 *change = 0;
2398 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2399 return -EIO;
2400 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2401 READ_BUF(8);
2402 READ64(*change);
2403 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2404 ret = NFS_ATTR_FATTR_CHANGE;
2405 }
2406 dprintk("%s: change attribute=%Lu\n", __func__,
2407 (unsigned long long)*change);
2408 return ret;
2409}
2410
2411static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2412{
2413 __be32 *p;
2414 int ret = 0;
2415
2416 *size = 0;
2417 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2418 return -EIO;
2419 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2420 READ_BUF(8);
2421 READ64(*size);
2422 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2423 ret = NFS_ATTR_FATTR_SIZE;
2424 }
2425 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2426 return ret;
2427}
2428
2429static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2430{
2431 __be32 *p;
2432
2433 *res = 0;
2434 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2435 return -EIO;
2436 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2437 READ_BUF(4);
2438 READ32(*res);
2439 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2440 }
2441 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2442 return 0;
2443}
2444
2445static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2446{
2447 __be32 *p;
2448
2449 *res = 0;
2450 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2451 return -EIO;
2452 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2453 READ_BUF(4);
2454 READ32(*res);
2455 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2456 }
2457 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2458 return 0;
2459}
2460
2461static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2462{
2463 __be32 *p;
2464 int ret = 0;
2465
2466 fsid->major = 0;
2467 fsid->minor = 0;
2468 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2469 return -EIO;
2470 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2471 READ_BUF(16);
2472 READ64(fsid->major);
2473 READ64(fsid->minor);
2474 bitmap[0] &= ~FATTR4_WORD0_FSID;
2475 ret = NFS_ATTR_FATTR_FSID;
2476 }
2477 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2478 (unsigned long long)fsid->major,
2479 (unsigned long long)fsid->minor);
2480 return ret;
2481}
2482
2483static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2484{
2485 __be32 *p;
2486
2487 *res = 60;
2488 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2489 return -EIO;
2490 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2491 READ_BUF(4);
2492 READ32(*res);
2493 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2494 }
2495 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2496 return 0;
2497}
2498
2499static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2500{
2501 __be32 *p;
2502
2503 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2504 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2505 return -EIO;
2506 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2507 READ_BUF(4);
2508 READ32(*res);
2509 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2510 }
2511 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2512 return 0;
2513}
2514
2515static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2516{
2517 __be32 *p;
2518 int ret = 0;
2519
2520 *fileid = 0;
2521 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2522 return -EIO;
2523 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2524 READ_BUF(8);
2525 READ64(*fileid);
2526 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2527 ret = NFS_ATTR_FATTR_FILEID;
2528 }
2529 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2530 return ret;
2531}
2532
2533static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2534{
2535 __be32 *p;
2536 int ret = 0;
2537
2538 *fileid = 0;
2539 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2540 return -EIO;
2541 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2542 READ_BUF(8);
2543 READ64(*fileid);
2544 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2545 ret = NFS_ATTR_FATTR_FILEID;
2546 }
2547 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2548 return ret;
2549}
2550
2551static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2552{
2553 __be32 *p;
2554 int status = 0;
2555
2556 *res = 0;
2557 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2558 return -EIO;
2559 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2560 READ_BUF(8);
2561 READ64(*res);
2562 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2563 }
2564 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2565 return status;
2566}
2567
2568static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2569{
2570 __be32 *p;
2571 int status = 0;
2572
2573 *res = 0;
2574 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2575 return -EIO;
2576 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2577 READ_BUF(8);
2578 READ64(*res);
2579 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2580 }
2581 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2582 return status;
2583}
2584
2585static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2586{
2587 __be32 *p;
2588 int status = 0;
2589
2590 *res = 0;
2591 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2592 return -EIO;
2593 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2594 READ_BUF(8);
2595 READ64(*res);
2596 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2597 }
2598 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2599 return status;
2600}
2601
2602static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2603{
2604 u32 n;
2605 __be32 *p;
2606 int status = 0;
2607
2608 READ_BUF(4);
2609 READ32(n);
2610 if (n == 0)
2611 goto root_path;
2612 dprintk("path ");
2613 path->ncomponents = 0;
2614 while (path->ncomponents < n) {
2615 struct nfs4_string *component = &path->components[path->ncomponents];
2616 status = decode_opaque_inline(xdr, &component->len, &component->data);
2617 if (unlikely(status != 0))
2618 goto out_eio;
2619 if (path->ncomponents != n)
2620 dprintk("/");
2621 dprintk("%s", component->data);
2622 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2623 path->ncomponents++;
2624 else {
2625 dprintk("cannot parse %d components in path\n", n);
2626 goto out_eio;
2627 }
2628 }
2629out:
2630 dprintk("\n");
2631 return status;
2632root_path:
2633/* a root pathname is sent as a zero component4 */
2634 path->ncomponents = 1;
2635 path->components[0].len=0;
2636 path->components[0].data=NULL;
2637 dprintk("path /\n");
2638 goto out;
2639out_eio:
2640 dprintk(" status %d", status);
2641 status = -EIO;
2642 goto out;
2643}
2644
2645static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2646{
2647 int n;
2648 __be32 *p;
2649 int status = -EIO;
2650
2651 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2652 goto out;
2653 status = 0;
2654 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2655 goto out;
2656 dprintk("%s: fsroot ", __func__);
2657 status = decode_pathname(xdr, &res->fs_path);
2658 if (unlikely(status != 0))
2659 goto out;
2660 READ_BUF(4);
2661 READ32(n);
2662 if (n <= 0)
2663 goto out_eio;
2664 res->nlocations = 0;
2665 while (res->nlocations < n) {
2666 u32 m;
2667 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2668
2669 READ_BUF(4);
2670 READ32(m);
2671
2672 loc->nservers = 0;
2673 dprintk("%s: servers ", __func__);
2674 while (loc->nservers < m) {
2675 struct nfs4_string *server = &loc->servers[loc->nservers];
2676 status = decode_opaque_inline(xdr, &server->len, &server->data);
2677 if (unlikely(status != 0))
2678 goto out_eio;
2679 dprintk("%s ", server->data);
2680 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2681 loc->nservers++;
2682 else {
2683 unsigned int i;
2684 dprintk("%s: using first %u of %u servers "
2685 "returned for location %u\n",
2686 __func__,
2687 NFS4_FS_LOCATION_MAXSERVERS,
2688 m, res->nlocations);
2689 for (i = loc->nservers; i < m; i++) {
2690 unsigned int len;
2691 char *data;
2692 status = decode_opaque_inline(xdr, &len, &data);
2693 if (unlikely(status != 0))
2694 goto out_eio;
2695 }
2696 }
2697 }
2698 status = decode_pathname(xdr, &loc->rootpath);
2699 if (unlikely(status != 0))
2700 goto out_eio;
2701 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2702 res->nlocations++;
2703 }
2704 if (res->nlocations != 0)
2705 status = NFS_ATTR_FATTR_V4_REFERRAL;
2706out:
2707 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2708 return status;
2709out_eio:
2710 status = -EIO;
2711 goto out;
2712}
2713
2714static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2715{
2716 __be32 *p;
2717 int status = 0;
2718
2719 *res = 0;
2720 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2721 return -EIO;
2722 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2723 READ_BUF(8);
2724 READ64(*res);
2725 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2726 }
2727 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2728 return status;
2729}
2730
2731static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2732{
2733 __be32 *p;
2734 int status = 0;
2735
2736 *maxlink = 1;
2737 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2738 return -EIO;
2739 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2740 READ_BUF(4);
2741 READ32(*maxlink);
2742 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2743 }
2744 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2745 return status;
2746}
2747
2748static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2749{
2750 __be32 *p;
2751 int status = 0;
2752
2753 *maxname = 1024;
2754 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2755 return -EIO;
2756 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2757 READ_BUF(4);
2758 READ32(*maxname);
2759 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2760 }
2761 dprintk("%s: maxname=%u\n", __func__, *maxname);
2762 return status;
2763}
2764
2765static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2766{
2767 __be32 *p;
2768 int status = 0;
2769
2770 *res = 1024;
2771 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2772 return -EIO;
2773 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2774 uint64_t maxread;
2775 READ_BUF(8);
2776 READ64(maxread);
2777 if (maxread > 0x7FFFFFFF)
2778 maxread = 0x7FFFFFFF;
2779 *res = (uint32_t)maxread;
2780 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2781 }
2782 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2783 return status;
2784}
2785
2786static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2787{
2788 __be32 *p;
2789 int status = 0;
2790
2791 *res = 1024;
2792 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2793 return -EIO;
2794 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2795 uint64_t maxwrite;
2796 READ_BUF(8);
2797 READ64(maxwrite);
2798 if (maxwrite > 0x7FFFFFFF)
2799 maxwrite = 0x7FFFFFFF;
2800 *res = (uint32_t)maxwrite;
2801 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2802 }
2803 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2804 return status;
2805}
2806
2807static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2808{
2809 uint32_t tmp;
2810 __be32 *p;
2811 int ret = 0;
2812
2813 *mode = 0;
2814 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2815 return -EIO;
2816 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2817 READ_BUF(4);
2818 READ32(tmp);
2819 *mode = tmp & ~S_IFMT;
2820 bitmap[1] &= ~FATTR4_WORD1_MODE;
2821 ret = NFS_ATTR_FATTR_MODE;
2822 }
2823 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2824 return ret;
2825}
2826
2827static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2828{
2829 __be32 *p;
2830 int ret = 0;
2831
2832 *nlink = 1;
2833 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2834 return -EIO;
2835 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2836 READ_BUF(4);
2837 READ32(*nlink);
2838 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2839 ret = NFS_ATTR_FATTR_NLINK;
2840 }
2841 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2842 return ret;
2843}
2844
2845static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2846{
2847 uint32_t len;
2848 __be32 *p;
2849 int ret = 0;
2850
2851 *uid = -2;
2852 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2853 return -EIO;
2854 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2855 READ_BUF(4);
2856 READ32(len);
2857 READ_BUF(len);
2858 if (len < XDR_MAX_NETOBJ) {
2859 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2860 ret = NFS_ATTR_FATTR_OWNER;
2861 else
2862 dprintk("%s: nfs_map_name_to_uid failed!\n",
2863 __func__);
2864 } else
2865 dprintk("%s: name too long (%u)!\n",
2866 __func__, len);
2867 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2868 }
2869 dprintk("%s: uid=%d\n", __func__, (int)*uid);
2870 return ret;
2871}
2872
2873static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2874{
2875 uint32_t len;
2876 __be32 *p;
2877 int ret = 0;
2878
2879 *gid = -2;
2880 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2881 return -EIO;
2882 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2883 READ_BUF(4);
2884 READ32(len);
2885 READ_BUF(len);
2886 if (len < XDR_MAX_NETOBJ) {
2887 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2888 ret = NFS_ATTR_FATTR_GROUP;
2889 else
2890 dprintk("%s: nfs_map_group_to_gid failed!\n",
2891 __func__);
2892 } else
2893 dprintk("%s: name too long (%u)!\n",
2894 __func__, len);
2895 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2896 }
2897 dprintk("%s: gid=%d\n", __func__, (int)*gid);
2898 return ret;
2899}
2900
2901static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2902{
2903 uint32_t major = 0, minor = 0;
2904 __be32 *p;
2905 int ret = 0;
2906
2907 *rdev = MKDEV(0,0);
2908 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2909 return -EIO;
2910 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2911 dev_t tmp;
2912
2913 READ_BUF(8);
2914 READ32(major);
2915 READ32(minor);
2916 tmp = MKDEV(major, minor);
2917 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2918 *rdev = tmp;
2919 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2920 ret = NFS_ATTR_FATTR_RDEV;
2921 }
2922 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2923 return ret;
2924}
2925
2926static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2927{
2928 __be32 *p;
2929 int status = 0;
2930
2931 *res = 0;
2932 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2933 return -EIO;
2934 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2935 READ_BUF(8);
2936 READ64(*res);
2937 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2938 }
2939 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2940 return status;
2941}
2942
2943static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2944{
2945 __be32 *p;
2946 int status = 0;
2947
2948 *res = 0;
2949 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2950 return -EIO;
2951 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2952 READ_BUF(8);
2953 READ64(*res);
2954 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2955 }
2956 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2957 return status;
2958}
2959
2960static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2961{
2962 __be32 *p;
2963 int status = 0;
2964
2965 *res = 0;
2966 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2967 return -EIO;
2968 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2969 READ_BUF(8);
2970 READ64(*res);
2971 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2972 }
2973 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2974 return status;
2975}
2976
2977static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2978{
2979 __be32 *p;
2980 int ret = 0;
2981
2982 *used = 0;
2983 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2984 return -EIO;
2985 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2986 READ_BUF(8);
2987 READ64(*used);
2988 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2989 ret = NFS_ATTR_FATTR_SPACE_USED;
2990 }
2991 dprintk("%s: space used=%Lu\n", __func__,
2992 (unsigned long long)*used);
2993 return ret;
2994}
2995
2996static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2997{
2998 __be32 *p;
2999 uint64_t sec;
3000 uint32_t nsec;
3001
3002 READ_BUF(12);
3003 READ64(sec);
3004 READ32(nsec);
3005 time->tv_sec = (time_t)sec;
3006 time->tv_nsec = (long)nsec;
3007 return 0;
3008}
3009
3010static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3011{
3012 int status = 0;
3013
3014 time->tv_sec = 0;
3015 time->tv_nsec = 0;
3016 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3017 return -EIO;
3018 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3019 status = decode_attr_time(xdr, time);
3020 if (status == 0)
3021 status = NFS_ATTR_FATTR_ATIME;
3022 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3023 }
3024 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3025 return status;
3026}
3027
3028static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3029{
3030 int status = 0;
3031
3032 time->tv_sec = 0;
3033 time->tv_nsec = 0;
3034 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3035 return -EIO;
3036 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3037 status = decode_attr_time(xdr, time);
3038 if (status == 0)
3039 status = NFS_ATTR_FATTR_CTIME;
3040 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3041 }
3042 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3043 return status;
3044}
3045
3046static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3047{
3048 int status = 0;
3049
3050 time->tv_sec = 0;
3051 time->tv_nsec = 0;
3052 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3053 return -EIO;
3054 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3055 status = decode_attr_time(xdr, time);
3056 if (status == 0)
3057 status = NFS_ATTR_FATTR_MTIME;
3058 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3059 }
3060 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3061 return status;
3062}
3063
3064static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3065{
3066 unsigned int attrwords = XDR_QUADLEN(attrlen);
3067 unsigned int nwords = xdr->p - savep;
3068
3069 if (unlikely(attrwords != nwords)) {
3070 dprintk("%s: server returned incorrect attribute length: "
3071 "%u %c %u\n",
3072 __func__,
3073 attrwords << 2,
3074 (attrwords < nwords) ? '<' : '>',
3075 nwords << 2);
3076 return -EIO;
3077 }
3078 return 0;
3079}
3080
3081static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3082{
3083 __be32 *p;
3084
3085 READ_BUF(20);
3086 READ32(cinfo->atomic);
3087 READ64(cinfo->before);
3088 READ64(cinfo->after);
3089 return 0;
3090}
3091
3092static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3093{
3094 __be32 *p;
3095 uint32_t supp, acc;
3096 int status;
3097
3098 status = decode_op_hdr(xdr, OP_ACCESS);
3099 if (status)
3100 return status;
3101 READ_BUF(8);
3102 READ32(supp);
3103 READ32(acc);
3104 access->supported = supp;
3105 access->access = acc;
3106 return 0;
3107}
3108
3109static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3110{
3111 __be32 *p;
3112 int status;
3113
3114 status = decode_op_hdr(xdr, OP_CLOSE);
3115 if (status != -EIO)
3116 nfs_increment_open_seqid(status, res->seqid);
3117 if (status)
3118 return status;
3119 READ_BUF(NFS4_STATEID_SIZE);
3120 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3121 return 0;
3122}
3123
3124static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3125{
3126 __be32 *p;
3127 int status;
3128
3129 status = decode_op_hdr(xdr, OP_COMMIT);
3130 if (status)
3131 return status;
3132 READ_BUF(8);
3133 COPYMEM(res->verf->verifier, 8);
3134 return 0;
3135}
3136
3137static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3138{
3139 __be32 *p;
3140 uint32_t bmlen;
3141 int status;
3142
3143 status = decode_op_hdr(xdr, OP_CREATE);
3144 if (status)
3145 return status;
3146 if ((status = decode_change_info(xdr, cinfo)))
3147 return status;
3148 READ_BUF(4);
3149 READ32(bmlen);
3150 READ_BUF(bmlen << 2);
3151 return 0;
3152}
3153
3154static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3155{
3156 __be32 *savep;
3157 uint32_t attrlen, bitmap[2] = {0};
3158 int status;
3159
3160 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3161 goto xdr_error;
3162 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3163 goto xdr_error;
3164 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3165 goto xdr_error;
3166 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3167 goto xdr_error;
3168 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3169 goto xdr_error;
3170 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3171 goto xdr_error;
3172 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3173 goto xdr_error;
3174 status = verify_attr_len(xdr, savep, attrlen);
3175xdr_error:
3176 dprintk("%s: xdr returned %d!\n", __func__, -status);
3177 return status;
3178}
3179
3180static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3181{
3182 __be32 *savep;
3183 uint32_t attrlen, bitmap[2] = {0};
3184 int status;
3185
3186 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3187 goto xdr_error;
3188 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3189 goto xdr_error;
3190 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3191 goto xdr_error;
3192
3193 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3194 goto xdr_error;
3195 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3196 goto xdr_error;
3197 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3198 goto xdr_error;
3199 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3200 goto xdr_error;
3201 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3202 goto xdr_error;
3203 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3204 goto xdr_error;
3205
3206 status = verify_attr_len(xdr, savep, attrlen);
3207xdr_error:
3208 dprintk("%s: xdr returned %d!\n", __func__, -status);
3209 return status;
3210}
3211
3212static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3213{
3214 __be32 *savep;
3215 uint32_t attrlen, bitmap[2] = {0};
3216 int status;
3217
3218 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3219 goto xdr_error;
3220 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3221 goto xdr_error;
3222 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3223 goto xdr_error;
3224
3225 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3226 goto xdr_error;
3227 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3228 goto xdr_error;
3229
3230 status = verify_attr_len(xdr, savep, attrlen);
3231xdr_error:
3232 dprintk("%s: xdr returned %d!\n", __func__, -status);
3233 return status;
3234}
3235
3236static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3237{
3238 __be32 *savep;
3239 uint32_t attrlen,
3240 bitmap[2] = {0},
3241 type;
3242 int status;
3243 umode_t fmode = 0;
3244 uint64_t fileid;
3245
3246 status = decode_op_hdr(xdr, OP_GETATTR);
3247 if (status < 0)
3248 goto xdr_error;
3249
3250 status = decode_attr_bitmap(xdr, bitmap);
3251 if (status < 0)
3252 goto xdr_error;
3253
3254 status = decode_attr_length(xdr, &attrlen, &savep);
3255 if (status < 0)
3256 goto xdr_error;
3257
3258
3259 status = decode_attr_type(xdr, bitmap, &type);
3260 if (status < 0)
3261 goto xdr_error;
3262 fattr->mode = 0;
3263 if (status != 0) {
3264 fattr->mode |= nfs_type2fmt[type];
3265 fattr->valid |= status;
3266 }
3267
3268 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3269 if (status < 0)
3270 goto xdr_error;
3271 fattr->valid |= status;
3272
3273 status = decode_attr_size(xdr, bitmap, &fattr->size);
3274 if (status < 0)
3275 goto xdr_error;
3276 fattr->valid |= status;
3277
3278 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3279 if (status < 0)
3280 goto xdr_error;
3281 fattr->valid |= status;
3282
3283 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3284 if (status < 0)
3285 goto xdr_error;
3286 fattr->valid |= status;
3287
3288 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3289 struct nfs4_fs_locations,
3290 fattr));
3291 if (status < 0)
3292 goto xdr_error;
3293 fattr->valid |= status;
3294
3295 status = decode_attr_mode(xdr, bitmap, &fmode);
3296 if (status < 0)
3297 goto xdr_error;
3298 if (status != 0) {
3299 fattr->mode |= fmode;
3300 fattr->valid |= status;
3301 }
3302
3303 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3304 if (status < 0)
3305 goto xdr_error;
3306 fattr->valid |= status;
3307
3308 status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3309 if (status < 0)
3310 goto xdr_error;
3311 fattr->valid |= status;
3312
3313 status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3314 if (status < 0)
3315 goto xdr_error;
3316 fattr->valid |= status;
3317
3318 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3319 if (status < 0)
3320 goto xdr_error;
3321 fattr->valid |= status;
3322
3323 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3324 if (status < 0)
3325 goto xdr_error;
3326 fattr->valid |= status;
3327
3328 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3329 if (status < 0)
3330 goto xdr_error;
3331 fattr->valid |= status;
3332
3333 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3334 if (status < 0)
3335 goto xdr_error;
3336 fattr->valid |= status;
3337
3338 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3339 if (status < 0)
3340 goto xdr_error;
3341 fattr->valid |= status;
3342
3343 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3344 if (status < 0)
3345 goto xdr_error;
3346 if (status != 0 && !(fattr->valid & status)) {
3347 fattr->fileid = fileid;
3348 fattr->valid |= status;
3349 }
3350
3351 status = verify_attr_len(xdr, savep, attrlen);
3352xdr_error:
3353 dprintk("%s: xdr returned %d\n", __func__, -status);
3354 return status;
3355}
3356
3357
3358static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3359{
3360 __be32 *savep;
3361 uint32_t attrlen, bitmap[2];
3362 int status;
3363
3364 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3365 goto xdr_error;
3366 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3367 goto xdr_error;
3368 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3369 goto xdr_error;
3370
3371 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3372
3373 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3374 goto xdr_error;
3375 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3376 goto xdr_error;
3377 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3378 goto xdr_error;
3379 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3380 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3381 goto xdr_error;
3382 fsinfo->wtpref = fsinfo->wtmax;
3383
3384 status = verify_attr_len(xdr, savep, attrlen);
3385xdr_error:
3386 dprintk("%s: xdr returned %d!\n", __func__, -status);
3387 return status;
3388}
3389
3390static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3391{
3392 __be32 *p;
3393 uint32_t len;
3394 int status;
3395
3396 /* Zero handle first to allow comparisons */
3397 memset(fh, 0, sizeof(*fh));
3398
3399 status = decode_op_hdr(xdr, OP_GETFH);
3400 if (status)
3401 return status;
3402
3403 READ_BUF(4);
3404 READ32(len);
3405 if (len > NFS4_FHSIZE)
3406 return -EIO;
3407 fh->size = len;
3408 READ_BUF(len);
3409 COPYMEM(fh->data, len);
3410 return 0;
3411}
3412
3413static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3414{
3415 int status;
3416
3417 status = decode_op_hdr(xdr, OP_LINK);
3418 if (status)
3419 return status;
3420 return decode_change_info(xdr, cinfo);
3421}
3422
3423/*
3424 * We create the owner, so we know a proper owner.id length is 4.
3425 */
3426static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3427{
3428 uint64_t offset, length, clientid;
3429 __be32 *p;
3430 uint32_t namelen, type;
3431
3432 READ_BUF(32);
3433 READ64(offset);
3434 READ64(length);
3435 READ32(type);
3436 if (fl != NULL) {
3437 fl->fl_start = (loff_t)offset;
3438 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3439 if (length == ~(uint64_t)0)
3440 fl->fl_end = OFFSET_MAX;
3441 fl->fl_type = F_WRLCK;
3442 if (type & 1)
3443 fl->fl_type = F_RDLCK;
3444 fl->fl_pid = 0;
3445 }
3446 READ64(clientid);
3447 READ32(namelen);
3448 READ_BUF(namelen);
3449 return -NFS4ERR_DENIED;
3450}
3451
3452static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3453{
3454 __be32 *p;
3455 int status;
3456
3457 status = decode_op_hdr(xdr, OP_LOCK);
3458 if (status == -EIO)
3459 goto out;
3460 if (status == 0) {
3461 READ_BUF(NFS4_STATEID_SIZE);
3462 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3463 } else if (status == -NFS4ERR_DENIED)
3464 status = decode_lock_denied(xdr, NULL);
3465 if (res->open_seqid != NULL)
3466 nfs_increment_open_seqid(status, res->open_seqid);
3467 nfs_increment_lock_seqid(status, res->lock_seqid);
3468out:
3469 return status;
3470}
3471
3472static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3473{
3474 int status;
3475 status = decode_op_hdr(xdr, OP_LOCKT);
3476 if (status == -NFS4ERR_DENIED)
3477 return decode_lock_denied(xdr, res->denied);
3478 return status;
3479}
3480
3481static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3482{
3483 __be32 *p;
3484 int status;
3485
3486 status = decode_op_hdr(xdr, OP_LOCKU);
3487 if (status != -EIO)
3488 nfs_increment_lock_seqid(status, res->seqid);
3489 if (status == 0) {
3490 READ_BUF(NFS4_STATEID_SIZE);
3491 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3492 }
3493 return status;
3494}
3495
3496static int decode_lookup(struct xdr_stream *xdr)
3497{
3498 return decode_op_hdr(xdr, OP_LOOKUP);
3499}
3500
3501/* This is too sick! */
3502static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3503{
3504 __be32 *p;
3505 uint32_t limit_type, nblocks, blocksize;
3506
3507 READ_BUF(12);
3508 READ32(limit_type);
3509 switch (limit_type) {
3510 case 1:
3511 READ64(*maxsize);
3512 break;
3513 case 2:
3514 READ32(nblocks);
3515 READ32(blocksize);
3516 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3517 }
3518 return 0;
3519}
3520
3521static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3522{
3523 __be32 *p;
3524 uint32_t delegation_type;
3525
3526 READ_BUF(4);
3527 READ32(delegation_type);
3528 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3529 res->delegation_type = 0;
3530 return 0;
3531 }
3532 READ_BUF(NFS4_STATEID_SIZE+4);
3533 COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3534 READ32(res->do_recall);
3535
3536 switch (delegation_type) {
3537 case NFS4_OPEN_DELEGATE_READ:
3538 res->delegation_type = FMODE_READ;
3539 break;
3540 case NFS4_OPEN_DELEGATE_WRITE:
3541 res->delegation_type = FMODE_WRITE|FMODE_READ;
3542 if (decode_space_limit(xdr, &res->maxsize) < 0)
3543 return -EIO;
3544 }
3545 return decode_ace(xdr, NULL, res->server->nfs_client);
3546}
3547
3548static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3549{
3550 __be32 *p;
3551 uint32_t savewords, bmlen, i;
3552 int status;
3553
3554 status = decode_op_hdr(xdr, OP_OPEN);
3555 if (status != -EIO)
3556 nfs_increment_open_seqid(status, res->seqid);
3557 if (status)
3558 return status;
3559 READ_BUF(NFS4_STATEID_SIZE);
3560 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3561
3562 decode_change_info(xdr, &res->cinfo);
3563
3564 READ_BUF(8);
3565 READ32(res->rflags);
3566 READ32(bmlen);
3567 if (bmlen > 10)
3568 goto xdr_error;
3569
3570 READ_BUF(bmlen << 2);
3571 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3572 for (i = 0; i < savewords; ++i)
3573 READ32(res->attrset[i]);
3574 for (; i < NFS4_BITMAP_SIZE; i++)
3575 res->attrset[i] = 0;
3576
3577 return decode_delegation(xdr, res);
3578xdr_error:
3579 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3580 return -EIO;
3581}
3582
3583static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3584{
3585 __be32 *p;
3586 int status;
3587
3588 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3589 if (status != -EIO)
3590 nfs_increment_open_seqid(status, res->seqid);
3591 if (status)
3592 return status;
3593 READ_BUF(NFS4_STATEID_SIZE);
3594 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3595 return 0;
3596}
3597
3598static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3599{
3600 __be32 *p;
3601 int status;
3602
3603 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3604 if (status != -EIO)
3605 nfs_increment_open_seqid(status, res->seqid);
3606 if (status)
3607 return status;
3608 READ_BUF(NFS4_STATEID_SIZE);
3609 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3610 return 0;
3611}
3612
3613static int decode_putfh(struct xdr_stream *xdr)
3614{
3615 return decode_op_hdr(xdr, OP_PUTFH);
3616}
3617
3618static int decode_putrootfh(struct xdr_stream *xdr)
3619{
3620 return decode_op_hdr(xdr, OP_PUTROOTFH);
3621}
3622
3623static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3624{
3625 struct kvec *iov = req->rq_rcv_buf.head;
3626 __be32 *p;
3627 uint32_t count, eof, recvd, hdrlen;
3628 int status;
3629
3630 status = decode_op_hdr(xdr, OP_READ);
3631 if (status)
3632 return status;
3633 READ_BUF(8);
3634 READ32(eof);
3635 READ32(count);
3636 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3637 recvd = req->rq_rcv_buf.len - hdrlen;
3638 if (count > recvd) {
3639 dprintk("NFS: server cheating in read reply: "
3640 "count %u > recvd %u\n", count, recvd);
3641 count = recvd;
3642 eof = 0;
3643 }
3644 xdr_read_pages(xdr, count);
3645 res->eof = eof;
3646 res->count = count;
3647 return 0;
3648}
3649
3650static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3651{
3652 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3653 struct page *page = *rcvbuf->pages;
3654 struct kvec *iov = rcvbuf->head;
3655 size_t hdrlen;
3656 u32 recvd, pglen = rcvbuf->page_len;
3657 __be32 *end, *entry, *p, *kaddr;
3658 unsigned int nr = 0;
3659 int status;
3660
3661 status = decode_op_hdr(xdr, OP_READDIR);
3662 if (status)
3663 return status;
3664 READ_BUF(8);
3665 COPYMEM(readdir->verifier.data, 8);
3666 dprintk("%s: verifier = %08x:%08x\n",
3667 __func__,
3668 ((u32 *)readdir->verifier.data)[0],
3669 ((u32 *)readdir->verifier.data)[1]);
3670
3671
3672 hdrlen = (char *) p - (char *) iov->iov_base;
3673 recvd = rcvbuf->len - hdrlen;
3674 if (pglen > recvd)
3675 pglen = recvd;
3676 xdr_read_pages(xdr, pglen);
3677
3678 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3679 kaddr = p = kmap_atomic(page, KM_USER0);
3680 end = p + ((pglen + readdir->pgbase) >> 2);
3681 entry = p;
3682
3683 /* Make sure the packet actually has a value_follows and EOF entry */
3684 if ((entry + 1) > end)
3685 goto short_pkt;
3686
3687 for (; *p++; nr++) {
3688 u32 len, attrlen, xlen;
3689 if (end - p < 3)
3690 goto short_pkt;
3691 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3692 p += 2; /* cookie */
3693 len = ntohl(*p++); /* filename length */
3694 if (len > NFS4_MAXNAMLEN) {
3695 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3696 len);
3697 goto err_unmap;
3698 }
3699 xlen = XDR_QUADLEN(len);
3700 if (end - p < xlen + 1)
3701 goto short_pkt;
3702 dprintk("filename = %*s\n", len, (char *)p);
3703 p += xlen;
3704 len = ntohl(*p++); /* bitmap length */
3705 if (end - p < len + 1)
3706 goto short_pkt;
3707 p += len;
3708 attrlen = XDR_QUADLEN(ntohl(*p++));
3709 if (end - p < attrlen + 2)
3710 goto short_pkt;
3711 p += attrlen; /* attributes */
3712 entry = p;
3713 }
3714 /*
3715 * Apparently some server sends responses that are a valid size, but
3716 * contain no entries, and have value_follows==0 and EOF==0. For
3717 * those, just set the EOF marker.
3718 */
3719 if (!nr && entry[1] == 0) {
3720 dprintk("NFS: readdir reply truncated!\n");
3721 entry[1] = 1;
3722 }
3723out:
3724 kunmap_atomic(kaddr, KM_USER0);
3725 return 0;
3726short_pkt:
3727 /*
3728 * When we get a short packet there are 2 possibilities. We can
3729 * return an error, or fix up the response to look like a valid
3730 * response and return what we have so far. If there are no
3731 * entries and the packet was short, then return -EIO. If there
3732 * are valid entries in the response, return them and pretend that
3733 * the call was successful, but incomplete. The caller can retry the
3734 * readdir starting at the last cookie.
3735 */
3736 dprintk("%s: short packet at entry %d\n", __func__, nr);
3737 entry[0] = entry[1] = 0;
3738 if (nr)
3739 goto out;
3740err_unmap:
3741 kunmap_atomic(kaddr, KM_USER0);
3742 return -errno_NFSERR_IO;
3743}
3744
3745static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3746{
3747 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3748 struct kvec *iov = rcvbuf->head;
3749 size_t hdrlen;
3750 u32 len, recvd;
3751 __be32 *p;
3752 char *kaddr;
3753 int status;
3754
3755 status = decode_op_hdr(xdr, OP_READLINK);
3756 if (status)
3757 return status;
3758
3759 /* Convert length of symlink */
3760 READ_BUF(4);
3761 READ32(len);
3762 if (len >= rcvbuf->page_len || len <= 0) {
3763 dprintk("nfs: server returned giant symlink!\n");
3764 return -ENAMETOOLONG;
3765 }
3766 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3767 recvd = req->rq_rcv_buf.len - hdrlen;
3768 if (recvd < len) {
3769 dprintk("NFS: server cheating in readlink reply: "
3770 "count %u > recvd %u\n", len, recvd);
3771 return -EIO;
3772 }
3773 xdr_read_pages(xdr, len);
3774 /*
3775 * The XDR encode routine has set things up so that
3776 * the link text will be copied directly into the
3777 * buffer. We just have to do overflow-checking,
3778 * and and null-terminate the text (the VFS expects
3779 * null-termination).
3780 */
3781 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3782 kaddr[len+rcvbuf->page_base] = '\0';
3783 kunmap_atomic(kaddr, KM_USER0);
3784 return 0;
3785}
3786
3787static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3788{
3789 int status;
3790
3791 status = decode_op_hdr(xdr, OP_REMOVE);
3792 if (status)
3793 goto out;
3794 status = decode_change_info(xdr, cinfo);
3795out:
3796 return status;
3797}
3798
3799static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3800 struct nfs4_change_info *new_cinfo)
3801{
3802 int status;
3803
3804 status = decode_op_hdr(xdr, OP_RENAME);
3805 if (status)
3806 goto out;
3807 if ((status = decode_change_info(xdr, old_cinfo)))
3808 goto out;
3809 status = decode_change_info(xdr, new_cinfo);
3810out:
3811 return status;
3812}
3813
3814static int decode_renew(struct xdr_stream *xdr)
3815{
3816 return decode_op_hdr(xdr, OP_RENEW);
3817}
3818
3819static int
3820decode_restorefh(struct xdr_stream *xdr)
3821{
3822 return decode_op_hdr(xdr, OP_RESTOREFH);
3823}
3824
3825static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3826 size_t *acl_len)
3827{
3828 __be32 *savep;
3829 uint32_t attrlen,
3830 bitmap[2] = {0};
3831 struct kvec *iov = req->rq_rcv_buf.head;
3832 int status;
3833
3834 *acl_len = 0;
3835 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3836 goto out;
3837 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3838 goto out;
3839 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3840 goto out;
3841
3842 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3843 return -EIO;
3844 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3845 size_t hdrlen;
3846 u32 recvd;
3847
3848 /* We ignore &savep and don't do consistency checks on
3849 * the attr length. Let userspace figure it out.... */
3850 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3851 recvd = req->rq_rcv_buf.len - hdrlen;
3852 if (attrlen > recvd) {
3853 dprintk("NFS: server cheating in getattr"
3854 " acl reply: attrlen %u > recvd %u\n",
3855 attrlen, recvd);
3856 return -EINVAL;
3857 }
3858 xdr_read_pages(xdr, attrlen);
3859 *acl_len = attrlen;
3860 } else
3861 status = -EOPNOTSUPP;
3862
3863out:
3864 return status;
3865}
3866
3867static int
3868decode_savefh(struct xdr_stream *xdr)
3869{
3870 return decode_op_hdr(xdr, OP_SAVEFH);
3871}
3872
3873static int decode_setattr(struct xdr_stream *xdr)
3874{
3875 __be32 *p;
3876 uint32_t bmlen;
3877 int status;
3878
3879 status = decode_op_hdr(xdr, OP_SETATTR);
3880 if (status)
3881 return status;
3882 READ_BUF(4);
3883 READ32(bmlen);
3884 READ_BUF(bmlen << 2);
3885 return 0;
3886}
3887
3888static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3889{
3890 __be32 *p;
3891 uint32_t opnum;
3892 int32_t nfserr;
3893
3894 READ_BUF(8);
3895 READ32(opnum);
3896 if (opnum != OP_SETCLIENTID) {
3897 dprintk("nfs: decode_setclientid: Server returned operation"
3898 " %d\n", opnum);
3899 return -EIO;
3900 }
3901 READ32(nfserr);
3902 if (nfserr == NFS_OK) {
3903 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3904 READ64(clp->cl_clientid);
3905 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3906 } else if (nfserr == NFSERR_CLID_INUSE) {
3907 uint32_t len;
3908
3909 /* skip netid string */
3910 READ_BUF(4);
3911 READ32(len);
3912 READ_BUF(len);
3913
3914 /* skip uaddr string */
3915 READ_BUF(4);
3916 READ32(len);
3917 READ_BUF(len);
3918 return -NFSERR_CLID_INUSE;
3919 } else
3920 return nfs4_stat_to_errno(nfserr);
3921
3922 return 0;
3923}
3924
3925static int decode_setclientid_confirm(struct xdr_stream *xdr)
3926{
3927 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3928}
3929
3930static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3931{
3932 __be32 *p;
3933 int status;
3934
3935 status = decode_op_hdr(xdr, OP_WRITE);
3936 if (status)
3937 return status;
3938
3939 READ_BUF(16);
3940 READ32(res->count);
3941 READ32(res->verf->committed);
3942 COPYMEM(res->verf->verifier, 8);
3943 return 0;
3944}
3945
3946static int decode_delegreturn(struct xdr_stream *xdr)
3947{
3948 return decode_op_hdr(xdr, OP_DELEGRETURN);
3949}
3950
3951#if defined(CONFIG_NFS_V4_1)
3952static int decode_exchange_id(struct xdr_stream *xdr,
3953 struct nfs41_exchange_id_res *res)
3954{
3955 __be32 *p;
3956 uint32_t dummy;
3957 int status;
3958 struct nfs_client *clp = res->client;
3959
3960 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
3961 if (status)
3962 return status;
3963
3964 READ_BUF(8);
3965 READ64(clp->cl_ex_clid);
3966 READ_BUF(12);
3967 READ32(clp->cl_seqid);
3968 READ32(clp->cl_exchange_flags);
3969
3970 /* We ask for SP4_NONE */
3971 READ32(dummy);
3972 if (dummy != SP4_NONE)
3973 return -EIO;
3974
3975 /* Throw away minor_id */
3976 READ_BUF(8);
3977
3978 /* Throw away Major id */
3979 READ_BUF(4);
3980 READ32(dummy);
3981 READ_BUF(dummy);
3982
3983 /* Throw away server_scope */
3984 READ_BUF(4);
3985 READ32(dummy);
3986 READ_BUF(dummy);
3987
3988 /* Throw away Implementation id array */
3989 READ_BUF(4);
3990 READ32(dummy);
3991 READ_BUF(dummy);
3992
3993 return 0;
3994}
3995#endif /* CONFIG_NFS_V4_1 */
3996
3997static int decode_sequence(struct xdr_stream *xdr,
3998 struct nfs4_sequence_res *res,
3999 struct rpc_rqst *rqstp)
4000{
4001#if defined(CONFIG_NFS_V4_1)
4002 if (!res->sr_session)
4003 return 0;
4004
4005 /* stub */
4006#endif /* CONFIG_NFS_V4_1 */
4007
4008 return 0;
4009}
4010
4011/*
4012 * END OF "GENERIC" DECODE ROUTINES.
4013 */
4014
4015/*
4016 * Decode OPEN_DOWNGRADE response
4017 */
4018static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4019{
4020 struct xdr_stream xdr;
4021 struct compound_hdr hdr;
4022 int status;
4023
4024 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4025 status = decode_compound_hdr(&xdr, &hdr);
4026 if (status)
4027 goto out;
4028 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4029 if (status)
4030 goto out;
4031 status = decode_putfh(&xdr);
4032 if (status)
4033 goto out;
4034 status = decode_open_downgrade(&xdr, res);
4035 if (status != 0)
4036 goto out;
4037 decode_getfattr(&xdr, res->fattr, res->server);
4038out:
4039 return status;
4040}
4041
4042/*
4043 * Decode ACCESS response
4044 */
4045static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4046{
4047 struct xdr_stream xdr;
4048 struct compound_hdr hdr;
4049 int status;
4050
4051 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4052 status = decode_compound_hdr(&xdr, &hdr);
4053 if (status)
4054 goto out;
4055 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4056 if (status)
4057 goto out;
4058 status = decode_putfh(&xdr);
4059 if (status != 0)
4060 goto out;
4061 status = decode_access(&xdr, res);
4062 if (status != 0)
4063 goto out;
4064 decode_getfattr(&xdr, res->fattr, res->server);
4065out:
4066 return status;
4067}
4068
4069/*
4070 * Decode LOOKUP response
4071 */
4072static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *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_sequence(&xdr, &res->seq_res, rqstp);
4083 if (status)
4084 goto out;
4085 if ((status = decode_putfh(&xdr)) != 0)
4086 goto out;
4087 if ((status = decode_lookup(&xdr)) != 0)
4088 goto out;
4089 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4090 goto out;
4091 status = decode_getfattr(&xdr, res->fattr, res->server);
4092out:
4093 return status;
4094}
4095
4096/*
4097 * Decode LOOKUP_ROOT response
4098 */
4099static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4100{
4101 struct xdr_stream xdr;
4102 struct compound_hdr hdr;
4103 int status;
4104
4105 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4106 status = decode_compound_hdr(&xdr, &hdr);
4107 if (status)
4108 goto out;
4109 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4110 if (status)
4111 goto out;
4112 if ((status = decode_putrootfh(&xdr)) != 0)
4113 goto out;
4114 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4115 status = decode_getfattr(&xdr, res->fattr, res->server);
4116out:
4117 return status;
4118}
4119
4120/*
4121 * Decode REMOVE response
4122 */
4123static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4124{
4125 struct xdr_stream xdr;
4126 struct compound_hdr hdr;
4127 int status;
4128
4129 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4130 status = decode_compound_hdr(&xdr, &hdr);
4131 if (status)
4132 goto out;
4133 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4134 if (status)
4135 goto out;
4136 if ((status = decode_putfh(&xdr)) != 0)
4137 goto out;
4138 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4139 goto out;
4140 decode_getfattr(&xdr, &res->dir_attr, res->server);
4141out:
4142 return status;
4143}
4144
4145/*
4146 * Decode RENAME response
4147 */
4148static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4149{
4150 struct xdr_stream xdr;
4151 struct compound_hdr hdr;
4152 int status;
4153
4154 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4155 status = decode_compound_hdr(&xdr, &hdr);
4156 if (status)
4157 goto out;
4158 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4159 if (status)
4160 goto out;
4161 if ((status = decode_putfh(&xdr)) != 0)
4162 goto out;
4163 if ((status = decode_savefh(&xdr)) != 0)
4164 goto out;
4165 if ((status = decode_putfh(&xdr)) != 0)
4166 goto out;
4167 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4168 goto out;
4169 /* Current FH is target directory */
4170 if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4171 goto out;
4172 if ((status = decode_restorefh(&xdr)) != 0)
4173 goto out;
4174 decode_getfattr(&xdr, res->old_fattr, res->server);
4175out:
4176 return status;
4177}
4178
4179/*
4180 * Decode LINK response
4181 */
4182static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4183{
4184 struct xdr_stream xdr;
4185 struct compound_hdr hdr;
4186 int status;
4187
4188 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4189 status = decode_compound_hdr(&xdr, &hdr);
4190 if (status)
4191 goto out;
4192 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4193 if (status)
4194 goto out;
4195 if ((status = decode_putfh(&xdr)) != 0)
4196 goto out;
4197 if ((status = decode_savefh(&xdr)) != 0)
4198 goto out;
4199 if ((status = decode_putfh(&xdr)) != 0)
4200 goto out;
4201 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4202 goto out;
4203 /*
4204 * Note order: OP_LINK leaves the directory as the current
4205 * filehandle.
4206 */
4207 if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4208 goto out;
4209 if ((status = decode_restorefh(&xdr)) != 0)
4210 goto out;
4211 decode_getfattr(&xdr, res->fattr, res->server);
4212out:
4213 return status;
4214}
4215
4216/*
4217 * Decode CREATE response
4218 */
4219static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4220{
4221 struct xdr_stream xdr;
4222 struct compound_hdr hdr;
4223 int status;
4224
4225 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4226 status = decode_compound_hdr(&xdr, &hdr);
4227 if (status)
4228 goto out;
4229 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4230 if (status)
4231 goto out;
4232 if ((status = decode_putfh(&xdr)) != 0)
4233 goto out;
4234 if ((status = decode_savefh(&xdr)) != 0)
4235 goto out;
4236 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4237 goto out;
4238 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4239 goto out;
4240 if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4241 goto out;
4242 if ((status = decode_restorefh(&xdr)) != 0)
4243 goto out;
4244 decode_getfattr(&xdr, res->dir_fattr, res->server);
4245out:
4246 return status;
4247}
4248
4249/*
4250 * Decode SYMLINK response
4251 */
4252static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4253{
4254 return nfs4_xdr_dec_create(rqstp, p, res);
4255}
4256
4257/*
4258 * Decode GETATTR response
4259 */
4260static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4261{
4262 struct xdr_stream xdr;
4263 struct compound_hdr hdr;
4264 int status;
4265
4266 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4267 status = decode_compound_hdr(&xdr, &hdr);
4268 if (status)
4269 goto out;
4270 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4271 if (status)
4272 goto out;
4273 status = decode_putfh(&xdr);
4274 if (status)
4275 goto out;
4276 status = decode_getfattr(&xdr, res->fattr, res->server);
4277out:
4278 return status;
4279}
4280
4281/*
4282 * Encode an SETACL request
4283 */
4284static int
4285nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4286{
4287 struct xdr_stream xdr;
4288 struct compound_hdr hdr = {
4289 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4290 };
4291 int status;
4292
4293 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4294 encode_compound_hdr(&xdr, req, &hdr);
4295 encode_sequence(&xdr, &args->seq_args, &hdr);
4296 encode_putfh(&xdr, args->fh, &hdr);
4297 status = encode_setacl(&xdr, args, &hdr);
4298 encode_nops(&hdr);
4299 return status;
4300}
4301
4302/*
4303 * Decode SETACL response
4304 */
4305static int
4306nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4307 struct nfs_setaclres *res)
4308{
4309 struct xdr_stream xdr;
4310 struct compound_hdr hdr;
4311 int status;
4312
4313 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4314 status = decode_compound_hdr(&xdr, &hdr);
4315 if (status)
4316 goto out;
4317 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4318 if (status)
4319 goto out;
4320 status = decode_putfh(&xdr);
4321 if (status)
4322 goto out;
4323 status = decode_setattr(&xdr);
4324out:
4325 return status;
4326}
4327
4328/*
4329 * Decode GETACL response
4330 */
4331static int
4332nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4333 struct nfs_getaclres *res)
4334{
4335 struct xdr_stream xdr;
4336 struct compound_hdr hdr;
4337 int status;
4338
4339 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4340 status = decode_compound_hdr(&xdr, &hdr);
4341 if (status)
4342 goto out;
4343 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4344 if (status)
4345 goto out;
4346 status = decode_putfh(&xdr);
4347 if (status)
4348 goto out;
4349 status = decode_getacl(&xdr, rqstp, &res->acl_len);
4350
4351out:
4352 return status;
4353}
4354
4355/*
4356 * Decode CLOSE response
4357 */
4358static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4359{
4360 struct xdr_stream xdr;
4361 struct compound_hdr hdr;
4362 int status;
4363
4364 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4365 status = decode_compound_hdr(&xdr, &hdr);
4366 if (status)
4367 goto out;
4368 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4369 if (status)
4370 goto out;
4371 status = decode_putfh(&xdr);
4372 if (status)
4373 goto out;
4374 status = decode_close(&xdr, res);
4375 if (status != 0)
4376 goto out;
4377 /*
4378 * Note: Server may do delete on close for this file
4379 * in which case the getattr call will fail with
4380 * an ESTALE error. Shouldn't be a problem,
4381 * though, since fattr->valid will remain unset.
4382 */
4383 decode_getfattr(&xdr, res->fattr, res->server);
4384out:
4385 return status;
4386}
4387
4388/*
4389 * Decode OPEN response
4390 */
4391static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4392{
4393 struct xdr_stream xdr;
4394 struct compound_hdr hdr;
4395 int status;
4396
4397 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4398 status = decode_compound_hdr(&xdr, &hdr);
4399 if (status)
4400 goto out;
4401 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4402 if (status)
4403 goto out;
4404 status = decode_putfh(&xdr);
4405 if (status)
4406 goto out;
4407 status = decode_savefh(&xdr);
4408 if (status)
4409 goto out;
4410 status = decode_open(&xdr, res);
4411 if (status)
4412 goto out;
4413 if (decode_getfh(&xdr, &res->fh) != 0)
4414 goto out;
4415 if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4416 goto out;
4417 if (decode_restorefh(&xdr) != 0)
4418 goto out;
4419 decode_getfattr(&xdr, res->dir_attr, res->server);
4420out:
4421 return status;
4422}
4423
4424/*
4425 * Decode OPEN_CONFIRM response
4426 */
4427static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4428{
4429 struct xdr_stream xdr;
4430 struct compound_hdr hdr;
4431 int status;
4432
4433 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4434 status = decode_compound_hdr(&xdr, &hdr);
4435 if (status)
4436 goto out;
4437 status = decode_putfh(&xdr);
4438 if (status)
4439 goto out;
4440 status = decode_open_confirm(&xdr, res);
4441out:
4442 return status;
4443}
4444
4445/*
4446 * Decode OPEN response
4447 */
4448static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4449{
4450 struct xdr_stream xdr;
4451 struct compound_hdr hdr;
4452 int status;
4453
4454 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4455 status = decode_compound_hdr(&xdr, &hdr);
4456 if (status)
4457 goto out;
4458 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4459 if (status)
4460 goto out;
4461 status = decode_putfh(&xdr);
4462 if (status)
4463 goto out;
4464 status = decode_open(&xdr, res);
4465 if (status)
4466 goto out;
4467 decode_getfattr(&xdr, res->f_attr, res->server);
4468out:
4469 return status;
4470}
4471
4472/*
4473 * Decode SETATTR response
4474 */
4475static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4476{
4477 struct xdr_stream xdr;
4478 struct compound_hdr hdr;
4479 int status;
4480
4481 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4482 status = decode_compound_hdr(&xdr, &hdr);
4483 if (status)
4484 goto out;
4485 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4486 if (status)
4487 goto out;
4488 status = decode_putfh(&xdr);
4489 if (status)
4490 goto out;
4491 status = decode_setattr(&xdr);
4492 if (status)
4493 goto out;
4494 decode_getfattr(&xdr, res->fattr, res->server);
4495out:
4496 return status;
4497}
4498
4499/*
4500 * Decode LOCK response
4501 */
4502static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4503{
4504 struct xdr_stream xdr;
4505 struct compound_hdr hdr;
4506 int status;
4507
4508 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4509 status = decode_compound_hdr(&xdr, &hdr);
4510 if (status)
4511 goto out;
4512 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4513 if (status)
4514 goto out;
4515 status = decode_putfh(&xdr);
4516 if (status)
4517 goto out;
4518 status = decode_lock(&xdr, res);
4519out:
4520 return status;
4521}
4522
4523/*
4524 * Decode LOCKT response
4525 */
4526static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4527{
4528 struct xdr_stream xdr;
4529 struct compound_hdr hdr;
4530 int status;
4531
4532 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4533 status = decode_compound_hdr(&xdr, &hdr);
4534 if (status)
4535 goto out;
4536 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4537 if (status)
4538 goto out;
4539 status = decode_putfh(&xdr);
4540 if (status)
4541 goto out;
4542 status = decode_lockt(&xdr, res);
4543out:
4544 return status;
4545}
4546
4547/*
4548 * Decode LOCKU response
4549 */
4550static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4551{
4552 struct xdr_stream xdr;
4553 struct compound_hdr hdr;
4554 int status;
4555
4556 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4557 status = decode_compound_hdr(&xdr, &hdr);
4558 if (status)
4559 goto out;
4560 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4561 if (status)
4562 goto out;
4563 status = decode_putfh(&xdr);
4564 if (status)
4565 goto out;
4566 status = decode_locku(&xdr, res);
4567out:
4568 return status;
4569}
4570
4571/*
4572 * Decode READLINK response
4573 */
4574static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4575 struct nfs4_readlink_res *res)
4576{
4577 struct xdr_stream xdr;
4578 struct compound_hdr hdr;
4579 int status;
4580
4581 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4582 status = decode_compound_hdr(&xdr, &hdr);
4583 if (status)
4584 goto out;
4585 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4586 if (status)
4587 goto out;
4588 status = decode_putfh(&xdr);
4589 if (status)
4590 goto out;
4591 status = decode_readlink(&xdr, rqstp);
4592out:
4593 return status;
4594}
4595
4596/*
4597 * Decode READDIR response
4598 */
4599static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4600{
4601 struct xdr_stream xdr;
4602 struct compound_hdr hdr;
4603 int status;
4604
4605 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4606 status = decode_compound_hdr(&xdr, &hdr);
4607 if (status)
4608 goto out;
4609 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4610 if (status)
4611 goto out;
4612 status = decode_putfh(&xdr);
4613 if (status)
4614 goto out;
4615 status = decode_readdir(&xdr, rqstp, res);
4616out:
4617 return status;
4618}
4619
4620/*
4621 * Decode Read response
4622 */
4623static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4624{
4625 struct xdr_stream xdr;
4626 struct compound_hdr hdr;
4627 int status;
4628
4629 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4630 status = decode_compound_hdr(&xdr, &hdr);
4631 if (status)
4632 goto out;
4633 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4634 if (status)
4635 goto out;
4636 status = decode_putfh(&xdr);
4637 if (status)
4638 goto out;
4639 status = decode_read(&xdr, rqstp, res);
4640 if (!status)
4641 status = res->count;
4642out:
4643 return status;
4644}
4645
4646/*
4647 * Decode WRITE response
4648 */
4649static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4650{
4651 struct xdr_stream xdr;
4652 struct compound_hdr hdr;
4653 int status;
4654
4655 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4656 status = decode_compound_hdr(&xdr, &hdr);
4657 if (status)
4658 goto out;
4659 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4660 if (status)
4661 goto out;
4662 status = decode_putfh(&xdr);
4663 if (status)
4664 goto out;
4665 status = decode_write(&xdr, res);
4666 if (status)
4667 goto out;
4668 decode_getfattr(&xdr, res->fattr, res->server);
4669 if (!status)
4670 status = res->count;
4671out:
4672 return status;
4673}
4674
4675/*
4676 * Decode COMMIT response
4677 */
4678static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4679{
4680 struct xdr_stream xdr;
4681 struct compound_hdr hdr;
4682 int status;
4683
4684 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4685 status = decode_compound_hdr(&xdr, &hdr);
4686 if (status)
4687 goto out;
4688 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4689 if (status)
4690 goto out;
4691 status = decode_putfh(&xdr);
4692 if (status)
4693 goto out;
4694 status = decode_commit(&xdr, res);
4695 if (status)
4696 goto out;
4697 decode_getfattr(&xdr, res->fattr, res->server);
4698out:
4699 return status;
4700}
4701
4702/*
4703 * FSINFO request
4704 */
4705static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
4706 struct nfs4_fsinfo_res *res)
4707{
4708 struct xdr_stream xdr;
4709 struct compound_hdr hdr;
4710 int status;
4711
4712 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4713 status = decode_compound_hdr(&xdr, &hdr);
4714 if (!status)
4715 status = decode_sequence(&xdr, &res->seq_res, req);
4716 if (!status)
4717 status = decode_putfh(&xdr);
4718 if (!status)
4719 status = decode_fsinfo(&xdr, res->fsinfo);
4720 return status;
4721}
4722
4723/*
4724 * PATHCONF request
4725 */
4726static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
4727 struct nfs4_pathconf_res *res)
4728{
4729 struct xdr_stream xdr;
4730 struct compound_hdr hdr;
4731 int status;
4732
4733 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4734 status = decode_compound_hdr(&xdr, &hdr);
4735 if (!status)
4736 status = decode_sequence(&xdr, &res->seq_res, req);
4737 if (!status)
4738 status = decode_putfh(&xdr);
4739 if (!status)
4740 status = decode_pathconf(&xdr, res->pathconf);
4741 return status;
4742}
4743
4744/*
4745 * STATFS request
4746 */
4747static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
4748 struct nfs4_statfs_res *res)
4749{
4750 struct xdr_stream xdr;
4751 struct compound_hdr hdr;
4752 int status;
4753
4754 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4755 status = decode_compound_hdr(&xdr, &hdr);
4756 if (!status)
4757 status = decode_sequence(&xdr, &res->seq_res, req);
4758 if (!status)
4759 status = decode_putfh(&xdr);
4760 if (!status)
4761 status = decode_statfs(&xdr, res->fsstat);
4762 return status;
4763}
4764
4765/*
4766 * GETATTR_BITMAP request
4767 */
4768static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4769{
4770 struct xdr_stream xdr;
4771 struct compound_hdr hdr;
4772 int status;
4773
4774 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4775 status = decode_compound_hdr(&xdr, &hdr);
4776 if (status)
4777 goto out;
4778 status = decode_sequence(&xdr, &res->seq_res, req);
4779 if (status)
4780 goto out;
4781 if ((status = decode_putfh(&xdr)) != 0)
4782 goto out;
4783 status = decode_server_caps(&xdr, res);
4784out:
4785 return status;
4786}
4787
4788/*
4789 * Decode RENEW response
4790 */
4791static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4792{
4793 struct xdr_stream xdr;
4794 struct compound_hdr hdr;
4795 int status;
4796
4797 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4798 status = decode_compound_hdr(&xdr, &hdr);
4799 if (!status)
4800 status = decode_renew(&xdr);
4801 return status;
4802}
4803
4804/*
4805 * a SETCLIENTID request
4806 */
4807static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4808 struct nfs_client *clp)
4809{
4810 struct xdr_stream xdr;
4811 struct compound_hdr hdr;
4812 int status;
4813
4814 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4815 status = decode_compound_hdr(&xdr, &hdr);
4816 if (!status)
4817 status = decode_setclientid(&xdr, clp);
4818 return status;
4819}
4820
4821/*
4822 * a SETCLIENTID_CONFIRM request
4823 */
4824static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4825{
4826 struct xdr_stream xdr;
4827 struct compound_hdr hdr;
4828 int status;
4829
4830 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4831 status = decode_compound_hdr(&xdr, &hdr);
4832 if (!status)
4833 status = decode_setclientid_confirm(&xdr);
4834 if (!status)
4835 status = decode_putrootfh(&xdr);
4836 if (!status)
4837 status = decode_fsinfo(&xdr, fsinfo);
4838 return status;
4839}
4840
4841/*
4842 * DELEGRETURN request
4843 */
4844static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4845{
4846 struct xdr_stream xdr;
4847 struct compound_hdr hdr;
4848 int status;
4849
4850 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4851 status = decode_compound_hdr(&xdr, &hdr);
4852 if (status)
4853 goto out;
4854 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4855 if (status)
4856 goto out;
4857 status = decode_putfh(&xdr);
4858 if (status != 0)
4859 goto out;
4860 status = decode_delegreturn(&xdr);
4861 decode_getfattr(&xdr, res->fattr, res->server);
4862out:
4863 return status;
4864}
4865
4866/*
4867 * FS_LOCATIONS request
4868 */
4869static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
4870 struct nfs4_fs_locations_res *res)
4871{
4872 struct xdr_stream xdr;
4873 struct compound_hdr hdr;
4874 int status;
4875
4876 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4877 status = decode_compound_hdr(&xdr, &hdr);
4878 if (status)
4879 goto out;
4880 status = decode_sequence(&xdr, &res->seq_res, req);
4881 if (status)
4882 goto out;
4883 if ((status = decode_putfh(&xdr)) != 0)
4884 goto out;
4885 if ((status = decode_lookup(&xdr)) != 0)
4886 goto out;
4887 xdr_enter_page(&xdr, PAGE_SIZE);
4888 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
4889 res->fs_locations->server);
4890out:
4891 return status;
4892}
4893
4894#if defined(CONFIG_NFS_V4_1)
4895/*
4896 * EXCHANGE_ID request
4897 */
4898static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
4899 void *res)
4900{
4901 struct xdr_stream xdr;
4902 struct compound_hdr hdr;
4903 int status;
4904
4905 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4906 status = decode_compound_hdr(&xdr, &hdr);
4907 if (!status)
4908 status = decode_exchange_id(&xdr, res);
4909 return status;
4910}
4911#endif /* CONFIG_NFS_V4_1 */
4912
4913__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4914{
4915 uint32_t bitmap[2] = {0};
4916 uint32_t len;
4917
4918 if (!*p++) {
4919 if (!*p)
4920 return ERR_PTR(-EAGAIN);
4921 entry->eof = 1;
4922 return ERR_PTR(-EBADCOOKIE);
4923 }
4924
4925 entry->prev_cookie = entry->cookie;
4926 p = xdr_decode_hyper(p, &entry->cookie);
4927 entry->len = ntohl(*p++);
4928 entry->name = (const char *) p;
4929 p += XDR_QUADLEN(entry->len);
4930
4931 /*
4932 * In case the server doesn't return an inode number,
4933 * we fake one here. (We don't use inode number 0,
4934 * since glibc seems to choke on it...)
4935 */
4936 entry->ino = 1;
4937
4938 len = ntohl(*p++); /* bitmap length */
4939 if (len-- > 0) {
4940 bitmap[0] = ntohl(*p++);
4941 if (len-- > 0) {
4942 bitmap[1] = ntohl(*p++);
4943 p += len;
4944 }
4945 }
4946 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4947 if (len > 0) {
4948 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4949 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4950 /* Ignore the return value of rdattr_error for now */
4951 p++;
4952 len--;
4953 }
4954 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4955 xdr_decode_hyper(p, &entry->ino);
4956 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4957 xdr_decode_hyper(p, &entry->ino);
4958 p += len;
4959 }
4960
4961 entry->eof = !p[0] && p[1];
4962 return p;
4963}
4964
4965/*
4966 * We need to translate between nfs status return values and
4967 * the local errno values which may not be the same.
4968 */
4969static struct {
4970 int stat;
4971 int errno;
4972} nfs_errtbl[] = {
4973 { NFS4_OK, 0 },
4974 { NFS4ERR_PERM, -EPERM },
4975 { NFS4ERR_NOENT, -ENOENT },
4976 { NFS4ERR_IO, -errno_NFSERR_IO},
4977 { NFS4ERR_NXIO, -ENXIO },
4978 { NFS4ERR_ACCESS, -EACCES },
4979 { NFS4ERR_EXIST, -EEXIST },
4980 { NFS4ERR_XDEV, -EXDEV },
4981 { NFS4ERR_NOTDIR, -ENOTDIR },
4982 { NFS4ERR_ISDIR, -EISDIR },
4983 { NFS4ERR_INVAL, -EINVAL },
4984 { NFS4ERR_FBIG, -EFBIG },
4985 { NFS4ERR_NOSPC, -ENOSPC },
4986 { NFS4ERR_ROFS, -EROFS },
4987 { NFS4ERR_MLINK, -EMLINK },
4988 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
4989 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
4990 { NFS4ERR_DQUOT, -EDQUOT },
4991 { NFS4ERR_STALE, -ESTALE },
4992 { NFS4ERR_BADHANDLE, -EBADHANDLE },
4993 { NFS4ERR_BADOWNER, -EINVAL },
4994 { NFS4ERR_BADNAME, -EINVAL },
4995 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
4996 { NFS4ERR_NOTSUPP, -ENOTSUPP },
4997 { NFS4ERR_TOOSMALL, -ETOOSMALL },
4998 { NFS4ERR_SERVERFAULT, -ESERVERFAULT },
4999 { NFS4ERR_BADTYPE, -EBADTYPE },
5000 { NFS4ERR_LOCKED, -EAGAIN },
5001 { NFS4ERR_RESOURCE, -EREMOTEIO },
5002 { NFS4ERR_SYMLINK, -ELOOP },
5003 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5004 { NFS4ERR_DEADLOCK, -EDEADLK },
5005 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5006 * to be handled by a
5007 * middle-layer.
5008 */
5009 { -1, -EIO }
5010};
5011
5012/*
5013 * Convert an NFS error code to a local one.
5014 * This one is used jointly by NFSv2 and NFSv3.
5015 */
5016static int
5017nfs4_stat_to_errno(int stat)
5018{
5019 int i;
5020 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5021 if (nfs_errtbl[i].stat == stat)
5022 return nfs_errtbl[i].errno;
5023 }
5024 if (stat <= 10000 || stat > 10100) {
5025 /* The server is looney tunes. */
5026 return -ESERVERFAULT;
5027 }
5028 /* If we cannot translate the error, the recovery routines should
5029 * handle it.
5030 * Note: remaining NFSv4 error codes have values > 10000, so should
5031 * not conflict with native Linux error codes.
5032 */
5033 return -stat;
5034}
5035
5036#define PROC(proc, argtype, restype) \
5037[NFSPROC4_CLNT_##proc] = { \
5038 .p_proc = NFSPROC4_COMPOUND, \
5039 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5040 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5041 .p_arglen = NFS4_##argtype##_sz, \
5042 .p_replen = NFS4_##restype##_sz, \
5043 .p_statidx = NFSPROC4_CLNT_##proc, \
5044 .p_name = #proc, \
5045}
5046
5047struct rpc_procinfo nfs4_procedures[] = {
5048 PROC(READ, enc_read, dec_read),
5049 PROC(WRITE, enc_write, dec_write),
5050 PROC(COMMIT, enc_commit, dec_commit),
5051 PROC(OPEN, enc_open, dec_open),
5052 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5053 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5054 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5055 PROC(CLOSE, enc_close, dec_close),
5056 PROC(SETATTR, enc_setattr, dec_setattr),
5057 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5058 PROC(RENEW, enc_renew, dec_renew),
5059 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5060 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5061 PROC(LOCK, enc_lock, dec_lock),
5062 PROC(LOCKT, enc_lockt, dec_lockt),
5063 PROC(LOCKU, enc_locku, dec_locku),
5064 PROC(ACCESS, enc_access, dec_access),
5065 PROC(GETATTR, enc_getattr, dec_getattr),
5066 PROC(LOOKUP, enc_lookup, dec_lookup),
5067 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5068 PROC(REMOVE, enc_remove, dec_remove),
5069 PROC(RENAME, enc_rename, dec_rename),
5070 PROC(LINK, enc_link, dec_link),
5071 PROC(SYMLINK, enc_symlink, dec_symlink),
5072 PROC(CREATE, enc_create, dec_create),
5073 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5074 PROC(STATFS, enc_statfs, dec_statfs),
5075 PROC(READLINK, enc_readlink, dec_readlink),
5076 PROC(READDIR, enc_readdir, dec_readdir),
5077 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5078 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5079 PROC(GETACL, enc_getacl, dec_getacl),
5080 PROC(SETACL, enc_setacl, dec_setacl),
5081 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5082#if defined(CONFIG_NFS_V4_1)
5083 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5084#endif /* CONFIG_NFS_V4_1 */
5085};
5086
5087struct rpc_version nfs_version4 = {
5088 .number = 4,
5089 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5090 .procs = nfs4_procedures
5091};
5092
5093/*
5094 * Local variables:
5095 * c-basic-offset: 8
5096 * End:
5097 */
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