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Fix gcc 4.5.1 miscompiling drivers/char/i8k.c (again)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfs / nfs4xdr.c
blobd741e0e3bce59fdfa3122247b1fdc801a0012783
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/errno.h>
43 #include <linux/string.h>
44 #include <linux/in.h>
45 #include <linux/pagemap.h>
46 #include <linux/proc_fs.h>
47 #include <linux/kdev_t.h>
48 #include <linux/sunrpc/clnt.h>
49 #include <linux/sunrpc/msg_prot.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 #include "internal.h"
56
57 #define NFSDBG_FACILITY NFSDBG_XDR
58
59 /* Mapping from NFS error code to "errno" error code. */
60 #define errno_NFSERR_IO EIO
61
62 static int nfs4_stat_to_errno(int);
63
64 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
65 #ifdef DEBUG
66 #define NFS4_MAXTAGLEN 20
67 #else
68 #define NFS4_MAXTAGLEN 0
69 #endif
70
71 /* lock,open owner id:
72 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
73 */
74 #define open_owner_id_maxsz (1 + 4)
75 #define lock_owner_id_maxsz (1 + 4)
76 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
77 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
79 #define op_encode_hdr_maxsz (1)
80 #define op_decode_hdr_maxsz (2)
81 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
86 (NFS4_FHSIZE >> 2))
87 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
88 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
89 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
90 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
91 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
92 ((3+NFS4_FHSIZE) >> 2))
93 #define nfs4_fattr_bitmap_maxsz 3
94 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
95 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
96 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
97 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 /* This is based on getfattr, which uses the most attributes: */
100 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
101 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
102 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
103 nfs4_fattr_value_maxsz)
104 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
105 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
106 1 + 2 + 1 + \
107 nfs4_owner_maxsz + \
108 nfs4_group_maxsz + \
109 4 + 4)
110 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
111 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
112 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
113 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
114 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
115 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
116 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
117 #define decode_renew_maxsz (op_decode_hdr_maxsz)
118 #define encode_setclientid_maxsz \
119 (op_encode_hdr_maxsz + \
120 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
121 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
122 1 /* sc_prog */ + \
123 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
124 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
125 1) /* sc_cb_ident */
126 #define decode_setclientid_maxsz \
127 (op_decode_hdr_maxsz + \
128 2 + \
129 1024) /* large value for CLID_INUSE */
130 #define encode_setclientid_confirm_maxsz \
131 (op_encode_hdr_maxsz + \
132 3 + (NFS4_VERIFIER_SIZE >> 2))
133 #define decode_setclientid_confirm_maxsz \
134 (op_decode_hdr_maxsz)
135 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
136 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
137 #define encode_share_access_maxsz \
138 (2)
139 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
140 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
141 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
142 #define encode_open_maxsz (op_encode_hdr_maxsz + \
143 2 + encode_share_access_maxsz + 2 + \
144 open_owner_id_maxsz + \
145 encode_opentype_maxsz + \
146 encode_claim_null_maxsz)
147 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
148 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
149 decode_ace_maxsz)
150 #define decode_change_info_maxsz (5)
151 #define decode_open_maxsz (op_decode_hdr_maxsz + \
152 decode_stateid_maxsz + \
153 decode_change_info_maxsz + 1 + \
154 nfs4_fattr_bitmap_maxsz + \
155 decode_delegation_maxsz)
156 #define encode_open_confirm_maxsz \
157 (op_encode_hdr_maxsz + \
158 encode_stateid_maxsz + 1)
159 #define decode_open_confirm_maxsz \
160 (op_decode_hdr_maxsz + \
161 decode_stateid_maxsz)
162 #define encode_open_downgrade_maxsz \
163 (op_encode_hdr_maxsz + \
164 encode_stateid_maxsz + 1 + \
165 encode_share_access_maxsz)
166 #define decode_open_downgrade_maxsz \
167 (op_decode_hdr_maxsz + \
168 decode_stateid_maxsz)
169 #define encode_close_maxsz (op_encode_hdr_maxsz + \
170 1 + encode_stateid_maxsz)
171 #define decode_close_maxsz (op_decode_hdr_maxsz + \
172 decode_stateid_maxsz)
173 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
174 encode_stateid_maxsz + \
175 encode_attrs_maxsz)
176 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
177 nfs4_fattr_bitmap_maxsz)
178 #define encode_read_maxsz (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 3)
180 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
181 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
182 2 + encode_verifier_maxsz + 5)
183 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
184 decode_verifier_maxsz)
185 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
186 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
187 #define encode_write_maxsz (op_encode_hdr_maxsz + \
188 encode_stateid_maxsz + 4)
189 #define decode_write_maxsz (op_decode_hdr_maxsz + \
190 2 + decode_verifier_maxsz)
191 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
192 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
193 decode_verifier_maxsz)
194 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
195 nfs4_name_maxsz)
196 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
197 decode_change_info_maxsz)
198 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
199 2 * nfs4_name_maxsz)
200 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
201 decode_change_info_maxsz + \
202 decode_change_info_maxsz)
203 #define encode_link_maxsz (op_encode_hdr_maxsz + \
204 nfs4_name_maxsz)
205 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
206 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
207 7 + \
208 1 + encode_stateid_maxsz + 8)
209 #define decode_lock_denied_maxsz \
210 (8 + decode_lockowner_maxsz)
211 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
212 decode_lock_denied_maxsz)
213 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 12)
214 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
215 decode_lock_denied_maxsz)
216 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
217 encode_stateid_maxsz + \
218 4)
219 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
220 decode_stateid_maxsz)
221 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
222 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
223 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
224 1 + nfs4_name_maxsz + \
225 1 + \
226 nfs4_fattr_maxsz)
227 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
228 #define encode_create_maxsz (op_encode_hdr_maxsz + \
229 1 + 2 + nfs4_name_maxsz + \
230 encode_attrs_maxsz)
231 #define decode_create_maxsz (op_decode_hdr_maxsz + \
232 decode_change_info_maxsz + \
233 nfs4_fattr_bitmap_maxsz)
234 #define encode_statfs_maxsz (encode_getattr_maxsz)
235 #define decode_statfs_maxsz (decode_getattr_maxsz)
236 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
237 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
238 #define encode_getacl_maxsz (encode_getattr_maxsz)
239 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
240 nfs4_fattr_bitmap_maxsz + 1)
241 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
242 encode_stateid_maxsz + 3)
243 #define decode_setacl_maxsz (decode_setattr_maxsz)
244 #define encode_fs_locations_maxsz \
245 (encode_getattr_maxsz)
246 #define decode_fs_locations_maxsz \
247 (0)
248
249 #if defined(CONFIG_NFS_V4_1)
250 #define NFS4_MAX_MACHINE_NAME_LEN (64)
251
252 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
253 encode_verifier_maxsz + \
254 1 /* co_ownerid.len */ + \
255 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
256 1 /* flags */ + \
257 1 /* spa_how */ + \
258 0 /* SP4_NONE (for now) */ + \
259 1 /* zero implemetation id array */)
260 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
261 2 /* eir_clientid */ + \
262 1 /* eir_sequenceid */ + \
263 1 /* eir_flags */ + \
264 1 /* spr_how */ + \
265 0 /* SP4_NONE (for now) */ + \
266 2 /* eir_server_owner.so_minor_id */ + \
267 /* eir_server_owner.so_major_id<> */ \
268 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
269 /* eir_server_scope<> */ \
270 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
271 1 /* eir_server_impl_id array length */ + \
272 0 /* ignored eir_server_impl_id contents */)
273 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
274 #define decode_channel_attrs_maxsz (6 + \
275 1 /* ca_rdma_ird.len */ + \
276 1 /* ca_rdma_ird */)
277 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
278 2 /* csa_clientid */ + \
279 1 /* csa_sequence */ + \
280 1 /* csa_flags */ + \
281 encode_channel_attrs_maxsz + \
282 encode_channel_attrs_maxsz + \
283 1 /* csa_cb_program */ + \
284 1 /* csa_sec_parms.len (1) */ + \
285 1 /* cb_secflavor (AUTH_SYS) */ + \
286 1 /* stamp */ + \
287 1 /* machinename.len */ + \
288 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
289 1 /* uid */ + \
290 1 /* gid */ + \
291 1 /* gids.len (0) */)
292 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
293 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
294 1 /* csr_sequence */ + \
295 1 /* csr_flags */ + \
296 decode_channel_attrs_maxsz + \
297 decode_channel_attrs_maxsz)
298 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
299 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
300 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
301 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
302 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
303 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
304 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
305 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
306 #else /* CONFIG_NFS_V4_1 */
307 #define encode_sequence_maxsz 0
308 #define decode_sequence_maxsz 0
309 #endif /* CONFIG_NFS_V4_1 */
310
311 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
312 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
313 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
314 encode_sequence_maxsz + \
315 encode_putfh_maxsz + \
316 encode_read_maxsz)
317 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
318 decode_sequence_maxsz + \
319 decode_putfh_maxsz + \
320 decode_read_maxsz)
321 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
322 encode_sequence_maxsz + \
323 encode_putfh_maxsz + \
324 encode_readlink_maxsz)
325 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
326 decode_sequence_maxsz + \
327 decode_putfh_maxsz + \
328 decode_readlink_maxsz)
329 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
330 encode_sequence_maxsz + \
331 encode_putfh_maxsz + \
332 encode_readdir_maxsz)
333 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
334 decode_sequence_maxsz + \
335 decode_putfh_maxsz + \
336 decode_readdir_maxsz)
337 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
338 encode_sequence_maxsz + \
339 encode_putfh_maxsz + \
340 encode_write_maxsz + \
341 encode_getattr_maxsz)
342 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
343 decode_sequence_maxsz + \
344 decode_putfh_maxsz + \
345 decode_write_maxsz + \
346 decode_getattr_maxsz)
347 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
348 encode_sequence_maxsz + \
349 encode_putfh_maxsz + \
350 encode_commit_maxsz + \
351 encode_getattr_maxsz)
352 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
353 decode_sequence_maxsz + \
354 decode_putfh_maxsz + \
355 decode_commit_maxsz + \
356 decode_getattr_maxsz)
357 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
358 encode_sequence_maxsz + \
359 encode_putfh_maxsz + \
360 encode_savefh_maxsz + \
361 encode_open_maxsz + \
362 encode_getfh_maxsz + \
363 encode_getattr_maxsz + \
364 encode_restorefh_maxsz + \
365 encode_getattr_maxsz)
366 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
367 decode_sequence_maxsz + \
368 decode_putfh_maxsz + \
369 decode_savefh_maxsz + \
370 decode_open_maxsz + \
371 decode_getfh_maxsz + \
372 decode_getattr_maxsz + \
373 decode_restorefh_maxsz + \
374 decode_getattr_maxsz)
375 #define NFS4_enc_open_confirm_sz \
376 (compound_encode_hdr_maxsz + \
377 encode_putfh_maxsz + \
378 encode_open_confirm_maxsz)
379 #define NFS4_dec_open_confirm_sz \
380 (compound_decode_hdr_maxsz + \
381 decode_putfh_maxsz + \
382 decode_open_confirm_maxsz)
383 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
384 encode_sequence_maxsz + \
385 encode_putfh_maxsz + \
386 encode_open_maxsz + \
387 encode_getattr_maxsz)
388 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
389 decode_sequence_maxsz + \
390 decode_putfh_maxsz + \
391 decode_open_maxsz + \
392 decode_getattr_maxsz)
393 #define NFS4_enc_open_downgrade_sz \
394 (compound_encode_hdr_maxsz + \
395 encode_sequence_maxsz + \
396 encode_putfh_maxsz + \
397 encode_open_downgrade_maxsz + \
398 encode_getattr_maxsz)
399 #define NFS4_dec_open_downgrade_sz \
400 (compound_decode_hdr_maxsz + \
401 decode_sequence_maxsz + \
402 decode_putfh_maxsz + \
403 decode_open_downgrade_maxsz + \
404 decode_getattr_maxsz)
405 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
406 encode_sequence_maxsz + \
407 encode_putfh_maxsz + \
408 encode_close_maxsz + \
409 encode_getattr_maxsz)
410 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
411 decode_sequence_maxsz + \
412 decode_putfh_maxsz + \
413 decode_close_maxsz + \
414 decode_getattr_maxsz)
415 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
416 encode_sequence_maxsz + \
417 encode_putfh_maxsz + \
418 encode_setattr_maxsz + \
419 encode_getattr_maxsz)
420 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
421 decode_sequence_maxsz + \
422 decode_putfh_maxsz + \
423 decode_setattr_maxsz + \
424 decode_getattr_maxsz)
425 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_fsinfo_maxsz)
429 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_fsinfo_maxsz)
433 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
434 encode_renew_maxsz)
435 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
436 decode_renew_maxsz)
437 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
438 encode_setclientid_maxsz)
439 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
440 decode_setclientid_maxsz)
441 #define NFS4_enc_setclientid_confirm_sz \
442 (compound_encode_hdr_maxsz + \
443 encode_setclientid_confirm_maxsz + \
444 encode_putrootfh_maxsz + \
445 encode_fsinfo_maxsz)
446 #define NFS4_dec_setclientid_confirm_sz \
447 (compound_decode_hdr_maxsz + \
448 decode_setclientid_confirm_maxsz + \
449 decode_putrootfh_maxsz + \
450 decode_fsinfo_maxsz)
451 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
452 encode_sequence_maxsz + \
453 encode_putfh_maxsz + \
454 encode_lock_maxsz)
455 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
456 decode_sequence_maxsz + \
457 decode_putfh_maxsz + \
458 decode_lock_maxsz)
459 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_lockt_maxsz)
463 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
464 decode_sequence_maxsz + \
465 decode_putfh_maxsz + \
466 decode_lockt_maxsz)
467 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
468 encode_sequence_maxsz + \
469 encode_putfh_maxsz + \
470 encode_locku_maxsz)
471 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
472 decode_sequence_maxsz + \
473 decode_putfh_maxsz + \
474 decode_locku_maxsz)
475 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
476 encode_sequence_maxsz + \
477 encode_putfh_maxsz + \
478 encode_access_maxsz + \
479 encode_getattr_maxsz)
480 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
481 decode_sequence_maxsz + \
482 decode_putfh_maxsz + \
483 decode_access_maxsz + \
484 decode_getattr_maxsz)
485 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
486 encode_sequence_maxsz + \
487 encode_putfh_maxsz + \
488 encode_getattr_maxsz)
489 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
490 decode_sequence_maxsz + \
491 decode_putfh_maxsz + \
492 decode_getattr_maxsz)
493 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
494 encode_sequence_maxsz + \
495 encode_putfh_maxsz + \
496 encode_lookup_maxsz + \
497 encode_getattr_maxsz + \
498 encode_getfh_maxsz)
499 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
500 decode_sequence_maxsz + \
501 decode_putfh_maxsz + \
502 decode_lookup_maxsz + \
503 decode_getattr_maxsz + \
504 decode_getfh_maxsz)
505 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
506 encode_sequence_maxsz + \
507 encode_putrootfh_maxsz + \
508 encode_getattr_maxsz + \
509 encode_getfh_maxsz)
510 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
511 decode_sequence_maxsz + \
512 decode_putrootfh_maxsz + \
513 decode_getattr_maxsz + \
514 decode_getfh_maxsz)
515 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
516 encode_sequence_maxsz + \
517 encode_putfh_maxsz + \
518 encode_remove_maxsz + \
519 encode_getattr_maxsz)
520 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
521 decode_sequence_maxsz + \
522 decode_putfh_maxsz + \
523 decode_remove_maxsz + \
524 decode_getattr_maxsz)
525 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
526 encode_sequence_maxsz + \
527 encode_putfh_maxsz + \
528 encode_savefh_maxsz + \
529 encode_putfh_maxsz + \
530 encode_rename_maxsz + \
531 encode_getattr_maxsz + \
532 encode_restorefh_maxsz + \
533 encode_getattr_maxsz)
534 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
535 decode_sequence_maxsz + \
536 decode_putfh_maxsz + \
537 decode_savefh_maxsz + \
538 decode_putfh_maxsz + \
539 decode_rename_maxsz + \
540 decode_getattr_maxsz + \
541 decode_restorefh_maxsz + \
542 decode_getattr_maxsz)
543 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
544 encode_sequence_maxsz + \
545 encode_putfh_maxsz + \
546 encode_savefh_maxsz + \
547 encode_putfh_maxsz + \
548 encode_link_maxsz + \
549 decode_getattr_maxsz + \
550 encode_restorefh_maxsz + \
551 decode_getattr_maxsz)
552 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
553 decode_sequence_maxsz + \
554 decode_putfh_maxsz + \
555 decode_savefh_maxsz + \
556 decode_putfh_maxsz + \
557 decode_link_maxsz + \
558 decode_getattr_maxsz + \
559 decode_restorefh_maxsz + \
560 decode_getattr_maxsz)
561 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
562 encode_sequence_maxsz + \
563 encode_putfh_maxsz + \
564 encode_symlink_maxsz + \
565 encode_getattr_maxsz + \
566 encode_getfh_maxsz)
567 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
568 decode_sequence_maxsz + \
569 decode_putfh_maxsz + \
570 decode_symlink_maxsz + \
571 decode_getattr_maxsz + \
572 decode_getfh_maxsz)
573 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
574 encode_sequence_maxsz + \
575 encode_putfh_maxsz + \
576 encode_savefh_maxsz + \
577 encode_create_maxsz + \
578 encode_getfh_maxsz + \
579 encode_getattr_maxsz + \
580 encode_restorefh_maxsz + \
581 encode_getattr_maxsz)
582 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
583 decode_sequence_maxsz + \
584 decode_putfh_maxsz + \
585 decode_savefh_maxsz + \
586 decode_create_maxsz + \
587 decode_getfh_maxsz + \
588 decode_getattr_maxsz + \
589 decode_restorefh_maxsz + \
590 decode_getattr_maxsz)
591 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_getattr_maxsz)
595 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
596 decode_sequence_maxsz + \
597 decode_putfh_maxsz + \
598 decode_getattr_maxsz)
599 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
600 encode_sequence_maxsz + \
601 encode_putfh_maxsz + \
602 encode_statfs_maxsz)
603 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
604 decode_sequence_maxsz + \
605 decode_putfh_maxsz + \
606 decode_statfs_maxsz)
607 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_getattr_maxsz)
611 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
612 decode_sequence_maxsz + \
613 decode_putfh_maxsz + \
614 decode_getattr_maxsz)
615 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
616 encode_sequence_maxsz + \
617 encode_putfh_maxsz + \
618 encode_delegreturn_maxsz + \
619 encode_getattr_maxsz)
620 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
621 decode_sequence_maxsz + \
622 decode_delegreturn_maxsz + \
623 decode_getattr_maxsz)
624 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
625 encode_sequence_maxsz + \
626 encode_putfh_maxsz + \
627 encode_getacl_maxsz)
628 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
629 decode_sequence_maxsz + \
630 decode_putfh_maxsz + \
631 decode_getacl_maxsz)
632 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
633 encode_sequence_maxsz + \
634 encode_putfh_maxsz + \
635 encode_setacl_maxsz)
636 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
637 decode_sequence_maxsz + \
638 decode_putfh_maxsz + \
639 decode_setacl_maxsz)
640 #define NFS4_enc_fs_locations_sz \
641 (compound_encode_hdr_maxsz + \
642 encode_sequence_maxsz + \
643 encode_putfh_maxsz + \
644 encode_lookup_maxsz + \
645 encode_fs_locations_maxsz)
646 #define NFS4_dec_fs_locations_sz \
647 (compound_decode_hdr_maxsz + \
648 decode_sequence_maxsz + \
649 decode_putfh_maxsz + \
650 decode_lookup_maxsz + \
651 decode_fs_locations_maxsz)
652 #if defined(CONFIG_NFS_V4_1)
653 #define NFS4_enc_exchange_id_sz \
654 (compound_encode_hdr_maxsz + \
655 encode_exchange_id_maxsz)
656 #define NFS4_dec_exchange_id_sz \
657 (compound_decode_hdr_maxsz + \
658 decode_exchange_id_maxsz)
659 #define NFS4_enc_create_session_sz \
660 (compound_encode_hdr_maxsz + \
661 encode_create_session_maxsz)
662 #define NFS4_dec_create_session_sz \
663 (compound_decode_hdr_maxsz + \
664 decode_create_session_maxsz)
665 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
666 encode_destroy_session_maxsz)
667 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
668 decode_destroy_session_maxsz)
669 #define NFS4_enc_sequence_sz \
670 (compound_decode_hdr_maxsz + \
671 encode_sequence_maxsz)
672 #define NFS4_dec_sequence_sz \
673 (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz)
675 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
676 encode_sequence_maxsz + \
677 encode_putrootfh_maxsz + \
678 encode_fsinfo_maxsz)
679 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
680 decode_sequence_maxsz + \
681 decode_putrootfh_maxsz + \
682 decode_fsinfo_maxsz)
683 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
684 encode_sequence_maxsz + \
685 encode_reclaim_complete_maxsz)
686 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
687 decode_sequence_maxsz + \
688 decode_reclaim_complete_maxsz)
689
690 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
691 compound_encode_hdr_maxsz +
692 encode_sequence_maxsz +
693 encode_putfh_maxsz +
694 encode_getattr_maxsz) *
695 XDR_UNIT);
696
697 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
698 compound_decode_hdr_maxsz +
699 decode_sequence_maxsz +
700 decode_putfh_maxsz) *
701 XDR_UNIT);
702 #endif /* CONFIG_NFS_V4_1 */
703
704 static const umode_t nfs_type2fmt[] = {
705 [NF4BAD] = 0,
706 [NF4REG] = S_IFREG,
707 [NF4DIR] = S_IFDIR,
708 [NF4BLK] = S_IFBLK,
709 [NF4CHR] = S_IFCHR,
710 [NF4LNK] = S_IFLNK,
711 [NF4SOCK] = S_IFSOCK,
712 [NF4FIFO] = S_IFIFO,
713 [NF4ATTRDIR] = 0,
714 [NF4NAMEDATTR] = 0,
715 };
716
717 struct compound_hdr {
718 int32_t status;
719 uint32_t nops;
720 __be32 * nops_p;
721 uint32_t taglen;
722 char * tag;
723 uint32_t replen; /* expected reply words */
724 u32 minorversion;
725 };
726
727 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
728 {
729 __be32 *p = xdr_reserve_space(xdr, nbytes);
730 BUG_ON(!p);
731 return p;
732 }
733
734 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
735 {
736 __be32 *p;
737
738 p = xdr_reserve_space(xdr, 4 + len);
739 BUG_ON(p == NULL);
740 xdr_encode_opaque(p, str, len);
741 }
742
743 static void encode_compound_hdr(struct xdr_stream *xdr,
744 struct rpc_rqst *req,
745 struct compound_hdr *hdr)
746 {
747 __be32 *p;
748 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
749
750 /* initialize running count of expected bytes in reply.
751 * NOTE: the replied tag SHOULD be the same is the one sent,
752 * but this is not required as a MUST for the server to do so. */
753 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
754
755 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
756 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
757 p = reserve_space(xdr, 4 + hdr->taglen + 8);
758 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
759 *p++ = cpu_to_be32(hdr->minorversion);
760 hdr->nops_p = p;
761 *p = cpu_to_be32(hdr->nops);
762 }
763
764 static void encode_nops(struct compound_hdr *hdr)
765 {
766 BUG_ON(hdr->nops > NFS4_MAX_OPS);
767 *hdr->nops_p = htonl(hdr->nops);
768 }
769
770 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
771 {
772 __be32 *p;
773
774 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
775 BUG_ON(p == NULL);
776 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
777 }
778
779 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
780 {
781 char owner_name[IDMAP_NAMESZ];
782 char owner_group[IDMAP_NAMESZ];
783 int owner_namelen = 0;
784 int owner_grouplen = 0;
785 __be32 *p;
786 __be32 *q;
787 int len;
788 uint32_t bmval0 = 0;
789 uint32_t bmval1 = 0;
790
791 /*
792 * We reserve enough space to write the entire attribute buffer at once.
793 * In the worst-case, this would be
794 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
795 * = 36 bytes, plus any contribution from variable-length fields
796 * such as owner/group.
797 */
798 len = 16;
799
800 /* Sigh */
801 if (iap->ia_valid & ATTR_SIZE)
802 len += 8;
803 if (iap->ia_valid & ATTR_MODE)
804 len += 4;
805 if (iap->ia_valid & ATTR_UID) {
806 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
807 if (owner_namelen < 0) {
808 dprintk("nfs: couldn't resolve uid %d to string\n",
809 iap->ia_uid);
810 /* XXX */
811 strcpy(owner_name, "nobody");
812 owner_namelen = sizeof("nobody") - 1;
813 /* goto out; */
814 }
815 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
816 }
817 if (iap->ia_valid & ATTR_GID) {
818 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
819 if (owner_grouplen < 0) {
820 dprintk("nfs: couldn't resolve gid %d to string\n",
821 iap->ia_gid);
822 strcpy(owner_group, "nobody");
823 owner_grouplen = sizeof("nobody") - 1;
824 /* goto out; */
825 }
826 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
827 }
828 if (iap->ia_valid & ATTR_ATIME_SET)
829 len += 16;
830 else if (iap->ia_valid & ATTR_ATIME)
831 len += 4;
832 if (iap->ia_valid & ATTR_MTIME_SET)
833 len += 16;
834 else if (iap->ia_valid & ATTR_MTIME)
835 len += 4;
836 p = reserve_space(xdr, len);
837
838 /*
839 * We write the bitmap length now, but leave the bitmap and the attribute
840 * buffer length to be backfilled at the end of this routine.
841 */
842 *p++ = cpu_to_be32(2);
843 q = p;
844 p += 3;
845
846 if (iap->ia_valid & ATTR_SIZE) {
847 bmval0 |= FATTR4_WORD0_SIZE;
848 p = xdr_encode_hyper(p, iap->ia_size);
849 }
850 if (iap->ia_valid & ATTR_MODE) {
851 bmval1 |= FATTR4_WORD1_MODE;
852 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
853 }
854 if (iap->ia_valid & ATTR_UID) {
855 bmval1 |= FATTR4_WORD1_OWNER;
856 p = xdr_encode_opaque(p, owner_name, owner_namelen);
857 }
858 if (iap->ia_valid & ATTR_GID) {
859 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
860 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
861 }
862 if (iap->ia_valid & ATTR_ATIME_SET) {
863 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
864 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
865 *p++ = cpu_to_be32(0);
866 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
867 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
868 }
869 else if (iap->ia_valid & ATTR_ATIME) {
870 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
871 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
872 }
873 if (iap->ia_valid & ATTR_MTIME_SET) {
874 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
875 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
876 *p++ = cpu_to_be32(0);
877 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
878 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
879 }
880 else if (iap->ia_valid & ATTR_MTIME) {
881 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
882 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
883 }
884
885 /*
886 * Now we backfill the bitmap and the attribute buffer length.
887 */
888 if (len != ((char *)p - (char *)q) + 4) {
889 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
890 len, ((char *)p - (char *)q) + 4);
891 BUG();
892 }
893 len = (char *)p - (char *)q - 12;
894 *q++ = htonl(bmval0);
895 *q++ = htonl(bmval1);
896 *q = htonl(len);
897
898 /* out: */
899 }
900
901 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
902 {
903 __be32 *p;
904
905 p = reserve_space(xdr, 8);
906 *p++ = cpu_to_be32(OP_ACCESS);
907 *p = cpu_to_be32(access);
908 hdr->nops++;
909 hdr->replen += decode_access_maxsz;
910 }
911
912 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
913 {
914 __be32 *p;
915
916 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
917 *p++ = cpu_to_be32(OP_CLOSE);
918 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
919 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
920 hdr->nops++;
921 hdr->replen += decode_close_maxsz;
922 }
923
924 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
925 {
926 __be32 *p;
927
928 p = reserve_space(xdr, 16);
929 *p++ = cpu_to_be32(OP_COMMIT);
930 p = xdr_encode_hyper(p, args->offset);
931 *p = cpu_to_be32(args->count);
932 hdr->nops++;
933 hdr->replen += decode_commit_maxsz;
934 }
935
936 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
937 {
938 __be32 *p;
939
940 p = reserve_space(xdr, 8);
941 *p++ = cpu_to_be32(OP_CREATE);
942 *p = cpu_to_be32(create->ftype);
943
944 switch (create->ftype) {
945 case NF4LNK:
946 p = reserve_space(xdr, 4);
947 *p = cpu_to_be32(create->u.symlink.len);
948 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
949 break;
950
951 case NF4BLK: case NF4CHR:
952 p = reserve_space(xdr, 8);
953 *p++ = cpu_to_be32(create->u.device.specdata1);
954 *p = cpu_to_be32(create->u.device.specdata2);
955 break;
956
957 default:
958 break;
959 }
960
961 encode_string(xdr, create->name->len, create->name->name);
962 hdr->nops++;
963 hdr->replen += decode_create_maxsz;
964
965 encode_attrs(xdr, create->attrs, create->server);
966 }
967
968 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
969 {
970 __be32 *p;
971
972 p = reserve_space(xdr, 12);
973 *p++ = cpu_to_be32(OP_GETATTR);
974 *p++ = cpu_to_be32(1);
975 *p = cpu_to_be32(bitmap);
976 hdr->nops++;
977 hdr->replen += decode_getattr_maxsz;
978 }
979
980 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
981 {
982 __be32 *p;
983
984 p = reserve_space(xdr, 16);
985 *p++ = cpu_to_be32(OP_GETATTR);
986 *p++ = cpu_to_be32(2);
987 *p++ = cpu_to_be32(bm0);
988 *p = cpu_to_be32(bm1);
989 hdr->nops++;
990 hdr->replen += decode_getattr_maxsz;
991 }
992
993 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
994 {
995 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
996 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
997 }
998
999 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1000 {
1001 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1002 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1003 }
1004
1005 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1006 {
1007 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1008 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1009 }
1010
1011 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1012 {
1013 __be32 *p;
1014
1015 p = reserve_space(xdr, 4);
1016 *p = cpu_to_be32(OP_GETFH);
1017 hdr->nops++;
1018 hdr->replen += decode_getfh_maxsz;
1019 }
1020
1021 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1022 {
1023 __be32 *p;
1024
1025 p = reserve_space(xdr, 8 + name->len);
1026 *p++ = cpu_to_be32(OP_LINK);
1027 xdr_encode_opaque(p, name->name, name->len);
1028 hdr->nops++;
1029 hdr->replen += decode_link_maxsz;
1030 }
1031
1032 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1033 {
1034 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1035 return block ? NFS4_READW_LT : NFS4_READ_LT;
1036 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1037 }
1038
1039 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1040 {
1041 if (fl->fl_end == OFFSET_MAX)
1042 return ~(uint64_t)0;
1043 return fl->fl_end - fl->fl_start + 1;
1044 }
1045
1046 /*
1047 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1048 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1049 */
1050 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1051 {
1052 __be32 *p;
1053
1054 p = reserve_space(xdr, 32);
1055 *p++ = cpu_to_be32(OP_LOCK);
1056 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1057 *p++ = cpu_to_be32(args->reclaim);
1058 p = xdr_encode_hyper(p, args->fl->fl_start);
1059 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1060 *p = cpu_to_be32(args->new_lock_owner);
1061 if (args->new_lock_owner){
1062 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1063 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1064 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1065 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1066 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1067 *p++ = cpu_to_be32(16);
1068 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1069 xdr_encode_hyper(p, args->lock_owner.id);
1070 }
1071 else {
1072 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1073 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1074 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1075 }
1076 hdr->nops++;
1077 hdr->replen += decode_lock_maxsz;
1078 }
1079
1080 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1081 {
1082 __be32 *p;
1083
1084 p = reserve_space(xdr, 52);
1085 *p++ = cpu_to_be32(OP_LOCKT);
1086 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1087 p = xdr_encode_hyper(p, args->fl->fl_start);
1088 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1089 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1090 *p++ = cpu_to_be32(16);
1091 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1092 xdr_encode_hyper(p, args->lock_owner.id);
1093 hdr->nops++;
1094 hdr->replen += decode_lockt_maxsz;
1095 }
1096
1097 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1098 {
1099 __be32 *p;
1100
1101 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1102 *p++ = cpu_to_be32(OP_LOCKU);
1103 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1104 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1105 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1106 p = xdr_encode_hyper(p, args->fl->fl_start);
1107 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1108 hdr->nops++;
1109 hdr->replen += decode_locku_maxsz;
1110 }
1111
1112 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1113 {
1114 int len = name->len;
1115 __be32 *p;
1116
1117 p = reserve_space(xdr, 8 + len);
1118 *p++ = cpu_to_be32(OP_LOOKUP);
1119 xdr_encode_opaque(p, name->name, len);
1120 hdr->nops++;
1121 hdr->replen += decode_lookup_maxsz;
1122 }
1123
1124 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1125 {
1126 __be32 *p;
1127
1128 p = reserve_space(xdr, 8);
1129 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1130 case FMODE_READ:
1131 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1132 break;
1133 case FMODE_WRITE:
1134 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1135 break;
1136 case FMODE_READ|FMODE_WRITE:
1137 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1138 break;
1139 default:
1140 *p++ = cpu_to_be32(0);
1141 }
1142 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1143 }
1144
1145 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1146 {
1147 __be32 *p;
1148 /*
1149 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1150 * owner 4 = 32
1151 */
1152 p = reserve_space(xdr, 8);
1153 *p++ = cpu_to_be32(OP_OPEN);
1154 *p = cpu_to_be32(arg->seqid->sequence->counter);
1155 encode_share_access(xdr, arg->fmode);
1156 p = reserve_space(xdr, 28);
1157 p = xdr_encode_hyper(p, arg->clientid);
1158 *p++ = cpu_to_be32(16);
1159 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1160 xdr_encode_hyper(p, arg->id);
1161 }
1162
1163 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1164 {
1165 __be32 *p;
1166 struct nfs_client *clp;
1167
1168 p = reserve_space(xdr, 4);
1169 switch(arg->open_flags & O_EXCL) {
1170 case 0:
1171 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1172 encode_attrs(xdr, arg->u.attrs, arg->server);
1173 break;
1174 default:
1175 clp = arg->server->nfs_client;
1176 if (clp->cl_minorversion > 0) {
1177 if (nfs4_has_persistent_session(clp)) {
1178 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1179 encode_attrs(xdr, arg->u.attrs, arg->server);
1180 } else {
1181 struct iattr dummy;
1182
1183 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1184 encode_nfs4_verifier(xdr, &arg->u.verifier);
1185 dummy.ia_valid = 0;
1186 encode_attrs(xdr, &dummy, arg->server);
1187 }
1188 } else {
1189 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1190 encode_nfs4_verifier(xdr, &arg->u.verifier);
1191 }
1192 }
1193 }
1194
1195 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1196 {
1197 __be32 *p;
1198
1199 p = reserve_space(xdr, 4);
1200 switch (arg->open_flags & O_CREAT) {
1201 case 0:
1202 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1203 break;
1204 default:
1205 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1206 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1207 encode_createmode(xdr, arg);
1208 }
1209 }
1210
1211 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1212 {
1213 __be32 *p;
1214
1215 p = reserve_space(xdr, 4);
1216 switch (delegation_type) {
1217 case 0:
1218 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1219 break;
1220 case FMODE_READ:
1221 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1222 break;
1223 case FMODE_WRITE|FMODE_READ:
1224 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1225 break;
1226 default:
1227 BUG();
1228 }
1229 }
1230
1231 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1232 {
1233 __be32 *p;
1234
1235 p = reserve_space(xdr, 4);
1236 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1237 encode_string(xdr, name->len, name->name);
1238 }
1239
1240 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1241 {
1242 __be32 *p;
1243
1244 p = reserve_space(xdr, 4);
1245 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1246 encode_delegation_type(xdr, type);
1247 }
1248
1249 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1250 {
1251 __be32 *p;
1252
1253 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1254 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1255 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1256 encode_string(xdr, name->len, name->name);
1257 }
1258
1259 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1260 {
1261 encode_openhdr(xdr, arg);
1262 encode_opentype(xdr, arg);
1263 switch (arg->claim) {
1264 case NFS4_OPEN_CLAIM_NULL:
1265 encode_claim_null(xdr, arg->name);
1266 break;
1267 case NFS4_OPEN_CLAIM_PREVIOUS:
1268 encode_claim_previous(xdr, arg->u.delegation_type);
1269 break;
1270 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1271 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1272 break;
1273 default:
1274 BUG();
1275 }
1276 hdr->nops++;
1277 hdr->replen += decode_open_maxsz;
1278 }
1279
1280 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1281 {
1282 __be32 *p;
1283
1284 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1285 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1286 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1287 *p = cpu_to_be32(arg->seqid->sequence->counter);
1288 hdr->nops++;
1289 hdr->replen += decode_open_confirm_maxsz;
1290 }
1291
1292 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1293 {
1294 __be32 *p;
1295
1296 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1297 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1298 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1299 *p = cpu_to_be32(arg->seqid->sequence->counter);
1300 encode_share_access(xdr, arg->fmode);
1301 hdr->nops++;
1302 hdr->replen += decode_open_downgrade_maxsz;
1303 }
1304
1305 static void
1306 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1307 {
1308 int len = fh->size;
1309 __be32 *p;
1310
1311 p = reserve_space(xdr, 8 + len);
1312 *p++ = cpu_to_be32(OP_PUTFH);
1313 xdr_encode_opaque(p, fh->data, len);
1314 hdr->nops++;
1315 hdr->replen += decode_putfh_maxsz;
1316 }
1317
1318 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1319 {
1320 __be32 *p;
1321
1322 p = reserve_space(xdr, 4);
1323 *p = cpu_to_be32(OP_PUTROOTFH);
1324 hdr->nops++;
1325 hdr->replen += decode_putrootfh_maxsz;
1326 }
1327
1328 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1329 {
1330 nfs4_stateid stateid;
1331 __be32 *p;
1332
1333 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1334 if (ctx->state != NULL) {
1335 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1336 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1337 } else
1338 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1339 }
1340
1341 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1342 {
1343 __be32 *p;
1344
1345 p = reserve_space(xdr, 4);
1346 *p = cpu_to_be32(OP_READ);
1347
1348 encode_stateid(xdr, args->context);
1349
1350 p = reserve_space(xdr, 12);
1351 p = xdr_encode_hyper(p, args->offset);
1352 *p = cpu_to_be32(args->count);
1353 hdr->nops++;
1354 hdr->replen += decode_read_maxsz;
1355 }
1356
1357 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1358 {
1359 uint32_t attrs[2] = {
1360 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1361 FATTR4_WORD1_MOUNTED_ON_FILEID,
1362 };
1363 __be32 *p;
1364
1365 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1366 *p++ = cpu_to_be32(OP_READDIR);
1367 p = xdr_encode_hyper(p, readdir->cookie);
1368 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1369 *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
1370 *p++ = cpu_to_be32(readdir->count);
1371 *p++ = cpu_to_be32(2);
1372 /* Switch to mounted_on_fileid if the server supports it */
1373 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1374 attrs[0] &= ~FATTR4_WORD0_FILEID;
1375 else
1376 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1377 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1378 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1379 hdr->nops++;
1380 hdr->replen += decode_readdir_maxsz;
1381 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1382 __func__,
1383 (unsigned long long)readdir->cookie,
1384 ((u32 *)readdir->verifier.data)[0],
1385 ((u32 *)readdir->verifier.data)[1],
1386 attrs[0] & readdir->bitmask[0],
1387 attrs[1] & readdir->bitmask[1]);
1388 }
1389
1390 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1391 {
1392 __be32 *p;
1393
1394 p = reserve_space(xdr, 4);
1395 *p = cpu_to_be32(OP_READLINK);
1396 hdr->nops++;
1397 hdr->replen += decode_readlink_maxsz;
1398 }
1399
1400 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1401 {
1402 __be32 *p;
1403
1404 p = reserve_space(xdr, 8 + name->len);
1405 *p++ = cpu_to_be32(OP_REMOVE);
1406 xdr_encode_opaque(p, name->name, name->len);
1407 hdr->nops++;
1408 hdr->replen += decode_remove_maxsz;
1409 }
1410
1411 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1412 {
1413 __be32 *p;
1414
1415 p = reserve_space(xdr, 4);
1416 *p = cpu_to_be32(OP_RENAME);
1417 encode_string(xdr, oldname->len, oldname->name);
1418 encode_string(xdr, newname->len, newname->name);
1419 hdr->nops++;
1420 hdr->replen += decode_rename_maxsz;
1421 }
1422
1423 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1424 {
1425 __be32 *p;
1426
1427 p = reserve_space(xdr, 12);
1428 *p++ = cpu_to_be32(OP_RENEW);
1429 xdr_encode_hyper(p, client_stateid->cl_clientid);
1430 hdr->nops++;
1431 hdr->replen += decode_renew_maxsz;
1432 }
1433
1434 static void
1435 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1436 {
1437 __be32 *p;
1438
1439 p = reserve_space(xdr, 4);
1440 *p = cpu_to_be32(OP_RESTOREFH);
1441 hdr->nops++;
1442 hdr->replen += decode_restorefh_maxsz;
1443 }
1444
1445 static int
1446 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1447 {
1448 __be32 *p;
1449
1450 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1451 *p++ = cpu_to_be32(OP_SETATTR);
1452 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1453 p = reserve_space(xdr, 2*4);
1454 *p++ = cpu_to_be32(1);
1455 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1456 if (arg->acl_len % 4)
1457 return -EINVAL;
1458 p = reserve_space(xdr, 4);
1459 *p = cpu_to_be32(arg->acl_len);
1460 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1461 hdr->nops++;
1462 hdr->replen += decode_setacl_maxsz;
1463 return 0;
1464 }
1465
1466 static void
1467 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1468 {
1469 __be32 *p;
1470
1471 p = reserve_space(xdr, 4);
1472 *p = cpu_to_be32(OP_SAVEFH);
1473 hdr->nops++;
1474 hdr->replen += decode_savefh_maxsz;
1475 }
1476
1477 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1478 {
1479 __be32 *p;
1480
1481 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1482 *p++ = cpu_to_be32(OP_SETATTR);
1483 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1484 hdr->nops++;
1485 hdr->replen += decode_setattr_maxsz;
1486 encode_attrs(xdr, arg->iap, server);
1487 }
1488
1489 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1490 {
1491 __be32 *p;
1492
1493 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1494 *p++ = cpu_to_be32(OP_SETCLIENTID);
1495 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1496
1497 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1498 p = reserve_space(xdr, 4);
1499 *p = cpu_to_be32(setclientid->sc_prog);
1500 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1501 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1502 p = reserve_space(xdr, 4);
1503 *p = cpu_to_be32(setclientid->sc_cb_ident);
1504 hdr->nops++;
1505 hdr->replen += decode_setclientid_maxsz;
1506 }
1507
1508 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1509 {
1510 __be32 *p;
1511
1512 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1513 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1514 p = xdr_encode_hyper(p, client_state->cl_clientid);
1515 xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1516 hdr->nops++;
1517 hdr->replen += decode_setclientid_confirm_maxsz;
1518 }
1519
1520 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1521 {
1522 __be32 *p;
1523
1524 p = reserve_space(xdr, 4);
1525 *p = cpu_to_be32(OP_WRITE);
1526
1527 encode_stateid(xdr, args->context);
1528
1529 p = reserve_space(xdr, 16);
1530 p = xdr_encode_hyper(p, args->offset);
1531 *p++ = cpu_to_be32(args->stable);
1532 *p = cpu_to_be32(args->count);
1533
1534 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1535 hdr->nops++;
1536 hdr->replen += decode_write_maxsz;
1537 }
1538
1539 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1540 {
1541 __be32 *p;
1542
1543 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1544
1545 *p++ = cpu_to_be32(OP_DELEGRETURN);
1546 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1547 hdr->nops++;
1548 hdr->replen += decode_delegreturn_maxsz;
1549 }
1550
1551 #if defined(CONFIG_NFS_V4_1)
1552 /* NFSv4.1 operations */
1553 static void encode_exchange_id(struct xdr_stream *xdr,
1554 struct nfs41_exchange_id_args *args,
1555 struct compound_hdr *hdr)
1556 {
1557 __be32 *p;
1558
1559 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1560 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1561 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1562
1563 encode_string(xdr, args->id_len, args->id);
1564
1565 p = reserve_space(xdr, 12);
1566 *p++ = cpu_to_be32(args->flags);
1567 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1568 *p = cpu_to_be32(0); /* zero length implementation id array */
1569 hdr->nops++;
1570 hdr->replen += decode_exchange_id_maxsz;
1571 }
1572
1573 static void encode_create_session(struct xdr_stream *xdr,
1574 struct nfs41_create_session_args *args,
1575 struct compound_hdr *hdr)
1576 {
1577 __be32 *p;
1578 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1579 uint32_t len;
1580 struct nfs_client *clp = args->client;
1581
1582 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1583 clp->cl_ipaddr);
1584
1585 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1586 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1587 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1588 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1589 *p++ = cpu_to_be32(args->flags); /*flags */
1590
1591 /* Fore Channel */
1592 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1593 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1594 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1595 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1596 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1597 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1598 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1599
1600 /* Back Channel */
1601 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1602 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1603 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1604 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1605 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1606 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1607 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1608
1609 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1610 *p++ = cpu_to_be32(1);
1611 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1612
1613 /* authsys_parms rfc1831 */
1614 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1615 p = xdr_encode_opaque(p, machine_name, len);
1616 *p++ = cpu_to_be32(0); /* UID */
1617 *p++ = cpu_to_be32(0); /* GID */
1618 *p = cpu_to_be32(0); /* No more gids */
1619 hdr->nops++;
1620 hdr->replen += decode_create_session_maxsz;
1621 }
1622
1623 static void encode_destroy_session(struct xdr_stream *xdr,
1624 struct nfs4_session *session,
1625 struct compound_hdr *hdr)
1626 {
1627 __be32 *p;
1628 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1629 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1630 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1631 hdr->nops++;
1632 hdr->replen += decode_destroy_session_maxsz;
1633 }
1634
1635 static void encode_reclaim_complete(struct xdr_stream *xdr,
1636 struct nfs41_reclaim_complete_args *args,
1637 struct compound_hdr *hdr)
1638 {
1639 __be32 *p;
1640
1641 p = reserve_space(xdr, 8);
1642 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1643 *p++ = cpu_to_be32(args->one_fs);
1644 hdr->nops++;
1645 hdr->replen += decode_reclaim_complete_maxsz;
1646 }
1647 #endif /* CONFIG_NFS_V4_1 */
1648
1649 static void encode_sequence(struct xdr_stream *xdr,
1650 const struct nfs4_sequence_args *args,
1651 struct compound_hdr *hdr)
1652 {
1653 #if defined(CONFIG_NFS_V4_1)
1654 struct nfs4_session *session = args->sa_session;
1655 struct nfs4_slot_table *tp;
1656 struct nfs4_slot *slot;
1657 __be32 *p;
1658
1659 if (!session)
1660 return;
1661
1662 tp = &session->fc_slot_table;
1663
1664 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1665 slot = tp->slots + args->sa_slotid;
1666
1667 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1668 *p++ = cpu_to_be32(OP_SEQUENCE);
1669
1670 /*
1671 * Sessionid + seqid + slotid + max slotid + cache_this
1672 */
1673 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1674 "max_slotid=%d cache_this=%d\n",
1675 __func__,
1676 ((u32 *)session->sess_id.data)[0],
1677 ((u32 *)session->sess_id.data)[1],
1678 ((u32 *)session->sess_id.data)[2],
1679 ((u32 *)session->sess_id.data)[3],
1680 slot->seq_nr, args->sa_slotid,
1681 tp->highest_used_slotid, args->sa_cache_this);
1682 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1683 *p++ = cpu_to_be32(slot->seq_nr);
1684 *p++ = cpu_to_be32(args->sa_slotid);
1685 *p++ = cpu_to_be32(tp->highest_used_slotid);
1686 *p = cpu_to_be32(args->sa_cache_this);
1687 hdr->nops++;
1688 hdr->replen += decode_sequence_maxsz;
1689 #endif /* CONFIG_NFS_V4_1 */
1690 }
1691
1692 /*
1693 * END OF "GENERIC" ENCODE ROUTINES.
1694 */
1695
1696 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1697 {
1698 #if defined(CONFIG_NFS_V4_1)
1699 if (args->sa_session)
1700 return args->sa_session->clp->cl_minorversion;
1701 #endif /* CONFIG_NFS_V4_1 */
1702 return 0;
1703 }
1704
1705 /*
1706 * Encode an ACCESS request
1707 */
1708 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1709 {
1710 struct xdr_stream xdr;
1711 struct compound_hdr hdr = {
1712 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1713 };
1714
1715 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1716 encode_compound_hdr(&xdr, req, &hdr);
1717 encode_sequence(&xdr, &args->seq_args, &hdr);
1718 encode_putfh(&xdr, args->fh, &hdr);
1719 encode_access(&xdr, args->access, &hdr);
1720 encode_getfattr(&xdr, args->bitmask, &hdr);
1721 encode_nops(&hdr);
1722 return 0;
1723 }
1724
1725 /*
1726 * Encode LOOKUP request
1727 */
1728 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1729 {
1730 struct xdr_stream xdr;
1731 struct compound_hdr hdr = {
1732 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1733 };
1734
1735 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1736 encode_compound_hdr(&xdr, req, &hdr);
1737 encode_sequence(&xdr, &args->seq_args, &hdr);
1738 encode_putfh(&xdr, args->dir_fh, &hdr);
1739 encode_lookup(&xdr, args->name, &hdr);
1740 encode_getfh(&xdr, &hdr);
1741 encode_getfattr(&xdr, args->bitmask, &hdr);
1742 encode_nops(&hdr);
1743 return 0;
1744 }
1745
1746 /*
1747 * Encode LOOKUP_ROOT request
1748 */
1749 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1750 {
1751 struct xdr_stream xdr;
1752 struct compound_hdr hdr = {
1753 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1754 };
1755
1756 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1757 encode_compound_hdr(&xdr, req, &hdr);
1758 encode_sequence(&xdr, &args->seq_args, &hdr);
1759 encode_putrootfh(&xdr, &hdr);
1760 encode_getfh(&xdr, &hdr);
1761 encode_getfattr(&xdr, args->bitmask, &hdr);
1762 encode_nops(&hdr);
1763 return 0;
1764 }
1765
1766 /*
1767 * Encode REMOVE request
1768 */
1769 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1770 {
1771 struct xdr_stream xdr;
1772 struct compound_hdr hdr = {
1773 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1774 };
1775
1776 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1777 encode_compound_hdr(&xdr, req, &hdr);
1778 encode_sequence(&xdr, &args->seq_args, &hdr);
1779 encode_putfh(&xdr, args->fh, &hdr);
1780 encode_remove(&xdr, &args->name, &hdr);
1781 encode_getfattr(&xdr, args->bitmask, &hdr);
1782 encode_nops(&hdr);
1783 return 0;
1784 }
1785
1786 /*
1787 * Encode RENAME request
1788 */
1789 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1790 {
1791 struct xdr_stream xdr;
1792 struct compound_hdr hdr = {
1793 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1794 };
1795
1796 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1797 encode_compound_hdr(&xdr, req, &hdr);
1798 encode_sequence(&xdr, &args->seq_args, &hdr);
1799 encode_putfh(&xdr, args->old_dir, &hdr);
1800 encode_savefh(&xdr, &hdr);
1801 encode_putfh(&xdr, args->new_dir, &hdr);
1802 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1803 encode_getfattr(&xdr, args->bitmask, &hdr);
1804 encode_restorefh(&xdr, &hdr);
1805 encode_getfattr(&xdr, args->bitmask, &hdr);
1806 encode_nops(&hdr);
1807 return 0;
1808 }
1809
1810 /*
1811 * Encode LINK request
1812 */
1813 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1814 {
1815 struct xdr_stream xdr;
1816 struct compound_hdr hdr = {
1817 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1818 };
1819
1820 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1821 encode_compound_hdr(&xdr, req, &hdr);
1822 encode_sequence(&xdr, &args->seq_args, &hdr);
1823 encode_putfh(&xdr, args->fh, &hdr);
1824 encode_savefh(&xdr, &hdr);
1825 encode_putfh(&xdr, args->dir_fh, &hdr);
1826 encode_link(&xdr, args->name, &hdr);
1827 encode_getfattr(&xdr, args->bitmask, &hdr);
1828 encode_restorefh(&xdr, &hdr);
1829 encode_getfattr(&xdr, args->bitmask, &hdr);
1830 encode_nops(&hdr);
1831 return 0;
1832 }
1833
1834 /*
1835 * Encode CREATE request
1836 */
1837 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1838 {
1839 struct xdr_stream xdr;
1840 struct compound_hdr hdr = {
1841 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842 };
1843
1844 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845 encode_compound_hdr(&xdr, req, &hdr);
1846 encode_sequence(&xdr, &args->seq_args, &hdr);
1847 encode_putfh(&xdr, args->dir_fh, &hdr);
1848 encode_savefh(&xdr, &hdr);
1849 encode_create(&xdr, args, &hdr);
1850 encode_getfh(&xdr, &hdr);
1851 encode_getfattr(&xdr, args->bitmask, &hdr);
1852 encode_restorefh(&xdr, &hdr);
1853 encode_getfattr(&xdr, args->bitmask, &hdr);
1854 encode_nops(&hdr);
1855 return 0;
1856 }
1857
1858 /*
1859 * Encode SYMLINK request
1860 */
1861 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1862 {
1863 return nfs4_xdr_enc_create(req, p, args);
1864 }
1865
1866 /*
1867 * Encode GETATTR request
1868 */
1869 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1870 {
1871 struct xdr_stream xdr;
1872 struct compound_hdr hdr = {
1873 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1874 };
1875
1876 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1877 encode_compound_hdr(&xdr, req, &hdr);
1878 encode_sequence(&xdr, &args->seq_args, &hdr);
1879 encode_putfh(&xdr, args->fh, &hdr);
1880 encode_getfattr(&xdr, args->bitmask, &hdr);
1881 encode_nops(&hdr);
1882 return 0;
1883 }
1884
1885 /*
1886 * Encode a CLOSE request
1887 */
1888 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1889 {
1890 struct xdr_stream xdr;
1891 struct compound_hdr hdr = {
1892 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1893 };
1894
1895 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1896 encode_compound_hdr(&xdr, req, &hdr);
1897 encode_sequence(&xdr, &args->seq_args, &hdr);
1898 encode_putfh(&xdr, args->fh, &hdr);
1899 encode_close(&xdr, args, &hdr);
1900 encode_getfattr(&xdr, args->bitmask, &hdr);
1901 encode_nops(&hdr);
1902 return 0;
1903 }
1904
1905 /*
1906 * Encode an OPEN request
1907 */
1908 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1909 {
1910 struct xdr_stream xdr;
1911 struct compound_hdr hdr = {
1912 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1913 };
1914
1915 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1916 encode_compound_hdr(&xdr, req, &hdr);
1917 encode_sequence(&xdr, &args->seq_args, &hdr);
1918 encode_putfh(&xdr, args->fh, &hdr);
1919 encode_savefh(&xdr, &hdr);
1920 encode_open(&xdr, args, &hdr);
1921 encode_getfh(&xdr, &hdr);
1922 encode_getfattr(&xdr, args->bitmask, &hdr);
1923 encode_restorefh(&xdr, &hdr);
1924 encode_getfattr(&xdr, args->bitmask, &hdr);
1925 encode_nops(&hdr);
1926 return 0;
1927 }
1928
1929 /*
1930 * Encode an OPEN_CONFIRM request
1931 */
1932 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1933 {
1934 struct xdr_stream xdr;
1935 struct compound_hdr hdr = {
1936 .nops = 0,
1937 };
1938
1939 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1940 encode_compound_hdr(&xdr, req, &hdr);
1941 encode_putfh(&xdr, args->fh, &hdr);
1942 encode_open_confirm(&xdr, args, &hdr);
1943 encode_nops(&hdr);
1944 return 0;
1945 }
1946
1947 /*
1948 * Encode an OPEN request with no attributes.
1949 */
1950 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1951 {
1952 struct xdr_stream xdr;
1953 struct compound_hdr hdr = {
1954 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1955 };
1956
1957 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1958 encode_compound_hdr(&xdr, req, &hdr);
1959 encode_sequence(&xdr, &args->seq_args, &hdr);
1960 encode_putfh(&xdr, args->fh, &hdr);
1961 encode_open(&xdr, args, &hdr);
1962 encode_getfattr(&xdr, args->bitmask, &hdr);
1963 encode_nops(&hdr);
1964 return 0;
1965 }
1966
1967 /*
1968 * Encode an OPEN_DOWNGRADE request
1969 */
1970 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1971 {
1972 struct xdr_stream xdr;
1973 struct compound_hdr hdr = {
1974 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1975 };
1976
1977 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1978 encode_compound_hdr(&xdr, req, &hdr);
1979 encode_sequence(&xdr, &args->seq_args, &hdr);
1980 encode_putfh(&xdr, args->fh, &hdr);
1981 encode_open_downgrade(&xdr, args, &hdr);
1982 encode_getfattr(&xdr, args->bitmask, &hdr);
1983 encode_nops(&hdr);
1984 return 0;
1985 }
1986
1987 /*
1988 * Encode a LOCK request
1989 */
1990 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1991 {
1992 struct xdr_stream xdr;
1993 struct compound_hdr hdr = {
1994 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1995 };
1996
1997 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1998 encode_compound_hdr(&xdr, req, &hdr);
1999 encode_sequence(&xdr, &args->seq_args, &hdr);
2000 encode_putfh(&xdr, args->fh, &hdr);
2001 encode_lock(&xdr, args, &hdr);
2002 encode_nops(&hdr);
2003 return 0;
2004 }
2005
2006 /*
2007 * Encode a LOCKT request
2008 */
2009 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2010 {
2011 struct xdr_stream xdr;
2012 struct compound_hdr hdr = {
2013 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2014 };
2015
2016 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2017 encode_compound_hdr(&xdr, req, &hdr);
2018 encode_sequence(&xdr, &args->seq_args, &hdr);
2019 encode_putfh(&xdr, args->fh, &hdr);
2020 encode_lockt(&xdr, args, &hdr);
2021 encode_nops(&hdr);
2022 return 0;
2023 }
2024
2025 /*
2026 * Encode a LOCKU request
2027 */
2028 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2029 {
2030 struct xdr_stream xdr;
2031 struct compound_hdr hdr = {
2032 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2033 };
2034
2035 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2036 encode_compound_hdr(&xdr, req, &hdr);
2037 encode_sequence(&xdr, &args->seq_args, &hdr);
2038 encode_putfh(&xdr, args->fh, &hdr);
2039 encode_locku(&xdr, args, &hdr);
2040 encode_nops(&hdr);
2041 return 0;
2042 }
2043
2044 /*
2045 * Encode a READLINK request
2046 */
2047 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2048 {
2049 struct xdr_stream xdr;
2050 struct compound_hdr hdr = {
2051 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2052 };
2053
2054 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2055 encode_compound_hdr(&xdr, req, &hdr);
2056 encode_sequence(&xdr, &args->seq_args, &hdr);
2057 encode_putfh(&xdr, args->fh, &hdr);
2058 encode_readlink(&xdr, args, req, &hdr);
2059
2060 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2061 args->pgbase, args->pglen);
2062 encode_nops(&hdr);
2063 return 0;
2064 }
2065
2066 /*
2067 * Encode a READDIR request
2068 */
2069 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2070 {
2071 struct xdr_stream xdr;
2072 struct compound_hdr hdr = {
2073 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2074 };
2075
2076 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2077 encode_compound_hdr(&xdr, req, &hdr);
2078 encode_sequence(&xdr, &args->seq_args, &hdr);
2079 encode_putfh(&xdr, args->fh, &hdr);
2080 encode_readdir(&xdr, args, req, &hdr);
2081
2082 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2083 args->pgbase, args->count);
2084 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2085 __func__, hdr.replen << 2, args->pages,
2086 args->pgbase, args->count);
2087 encode_nops(&hdr);
2088 return 0;
2089 }
2090
2091 /*
2092 * Encode a READ request
2093 */
2094 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2095 {
2096 struct xdr_stream xdr;
2097 struct compound_hdr hdr = {
2098 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099 };
2100
2101 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2102 encode_compound_hdr(&xdr, req, &hdr);
2103 encode_sequence(&xdr, &args->seq_args, &hdr);
2104 encode_putfh(&xdr, args->fh, &hdr);
2105 encode_read(&xdr, args, &hdr);
2106
2107 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2108 args->pages, args->pgbase, args->count);
2109 req->rq_rcv_buf.flags |= XDRBUF_READ;
2110 encode_nops(&hdr);
2111 return 0;
2112 }
2113
2114 /*
2115 * Encode an SETATTR request
2116 */
2117 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2118 {
2119 struct xdr_stream xdr;
2120 struct compound_hdr hdr = {
2121 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122 };
2123
2124 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2125 encode_compound_hdr(&xdr, req, &hdr);
2126 encode_sequence(&xdr, &args->seq_args, &hdr);
2127 encode_putfh(&xdr, args->fh, &hdr);
2128 encode_setattr(&xdr, args, args->server, &hdr);
2129 encode_getfattr(&xdr, args->bitmask, &hdr);
2130 encode_nops(&hdr);
2131 return 0;
2132 }
2133
2134 /*
2135 * Encode a GETACL request
2136 */
2137 static int
2138 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2139 struct nfs_getaclargs *args)
2140 {
2141 struct xdr_stream xdr;
2142 struct compound_hdr hdr = {
2143 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2144 };
2145 uint32_t replen;
2146
2147 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2148 encode_compound_hdr(&xdr, req, &hdr);
2149 encode_sequence(&xdr, &args->seq_args, &hdr);
2150 encode_putfh(&xdr, args->fh, &hdr);
2151 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2152 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2153
2154 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2155 args->acl_pages, args->acl_pgbase, args->acl_len);
2156 encode_nops(&hdr);
2157 return 0;
2158 }
2159
2160 /*
2161 * Encode a WRITE request
2162 */
2163 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2164 {
2165 struct xdr_stream xdr;
2166 struct compound_hdr hdr = {
2167 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2168 };
2169
2170 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2171 encode_compound_hdr(&xdr, req, &hdr);
2172 encode_sequence(&xdr, &args->seq_args, &hdr);
2173 encode_putfh(&xdr, args->fh, &hdr);
2174 encode_write(&xdr, args, &hdr);
2175 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2176 encode_getfattr(&xdr, args->bitmask, &hdr);
2177 encode_nops(&hdr);
2178 return 0;
2179 }
2180
2181 /*
2182 * a COMMIT request
2183 */
2184 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2185 {
2186 struct xdr_stream xdr;
2187 struct compound_hdr hdr = {
2188 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2189 };
2190
2191 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2192 encode_compound_hdr(&xdr, req, &hdr);
2193 encode_sequence(&xdr, &args->seq_args, &hdr);
2194 encode_putfh(&xdr, args->fh, &hdr);
2195 encode_commit(&xdr, args, &hdr);
2196 encode_getfattr(&xdr, args->bitmask, &hdr);
2197 encode_nops(&hdr);
2198 return 0;
2199 }
2200
2201 /*
2202 * FSINFO request
2203 */
2204 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2205 {
2206 struct xdr_stream xdr;
2207 struct compound_hdr hdr = {
2208 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209 };
2210
2211 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2212 encode_compound_hdr(&xdr, req, &hdr);
2213 encode_sequence(&xdr, &args->seq_args, &hdr);
2214 encode_putfh(&xdr, args->fh, &hdr);
2215 encode_fsinfo(&xdr, args->bitmask, &hdr);
2216 encode_nops(&hdr);
2217 return 0;
2218 }
2219
2220 /*
2221 * a PATHCONF request
2222 */
2223 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2224 {
2225 struct xdr_stream xdr;
2226 struct compound_hdr hdr = {
2227 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228 };
2229
2230 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2231 encode_compound_hdr(&xdr, req, &hdr);
2232 encode_sequence(&xdr, &args->seq_args, &hdr);
2233 encode_putfh(&xdr, args->fh, &hdr);
2234 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2235 &hdr);
2236 encode_nops(&hdr);
2237 return 0;
2238 }
2239
2240 /*
2241 * a STATFS request
2242 */
2243 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2244 {
2245 struct xdr_stream xdr;
2246 struct compound_hdr hdr = {
2247 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2248 };
2249
2250 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2251 encode_compound_hdr(&xdr, req, &hdr);
2252 encode_sequence(&xdr, &args->seq_args, &hdr);
2253 encode_putfh(&xdr, args->fh, &hdr);
2254 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2255 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2256 encode_nops(&hdr);
2257 return 0;
2258 }
2259
2260 /*
2261 * GETATTR_BITMAP request
2262 */
2263 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2264 struct nfs4_server_caps_arg *args)
2265 {
2266 struct xdr_stream xdr;
2267 struct compound_hdr hdr = {
2268 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2269 };
2270
2271 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2272 encode_compound_hdr(&xdr, req, &hdr);
2273 encode_sequence(&xdr, &args->seq_args, &hdr);
2274 encode_putfh(&xdr, args->fhandle, &hdr);
2275 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2276 FATTR4_WORD0_LINK_SUPPORT|
2277 FATTR4_WORD0_SYMLINK_SUPPORT|
2278 FATTR4_WORD0_ACLSUPPORT, &hdr);
2279 encode_nops(&hdr);
2280 return 0;
2281 }
2282
2283 /*
2284 * a RENEW request
2285 */
2286 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2287 {
2288 struct xdr_stream xdr;
2289 struct compound_hdr hdr = {
2290 .nops = 0,
2291 };
2292
2293 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2294 encode_compound_hdr(&xdr, req, &hdr);
2295 encode_renew(&xdr, clp, &hdr);
2296 encode_nops(&hdr);
2297 return 0;
2298 }
2299
2300 /*
2301 * a SETCLIENTID request
2302 */
2303 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2304 {
2305 struct xdr_stream xdr;
2306 struct compound_hdr hdr = {
2307 .nops = 0,
2308 };
2309
2310 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2311 encode_compound_hdr(&xdr, req, &hdr);
2312 encode_setclientid(&xdr, sc, &hdr);
2313 encode_nops(&hdr);
2314 return 0;
2315 }
2316
2317 /*
2318 * a SETCLIENTID_CONFIRM request
2319 */
2320 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2321 {
2322 struct xdr_stream xdr;
2323 struct compound_hdr hdr = {
2324 .nops = 0,
2325 };
2326 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2327
2328 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2329 encode_compound_hdr(&xdr, req, &hdr);
2330 encode_setclientid_confirm(&xdr, clp, &hdr);
2331 encode_putrootfh(&xdr, &hdr);
2332 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2333 encode_nops(&hdr);
2334 return 0;
2335 }
2336
2337 /*
2338 * DELEGRETURN request
2339 */
2340 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2341 {
2342 struct xdr_stream xdr;
2343 struct compound_hdr hdr = {
2344 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2345 };
2346
2347 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2348 encode_compound_hdr(&xdr, req, &hdr);
2349 encode_sequence(&xdr, &args->seq_args, &hdr);
2350 encode_putfh(&xdr, args->fhandle, &hdr);
2351 encode_delegreturn(&xdr, args->stateid, &hdr);
2352 encode_getfattr(&xdr, args->bitmask, &hdr);
2353 encode_nops(&hdr);
2354 return 0;
2355 }
2356
2357 /*
2358 * Encode FS_LOCATIONS request
2359 */
2360 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2361 {
2362 struct xdr_stream xdr;
2363 struct compound_hdr hdr = {
2364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365 };
2366 uint32_t replen;
2367
2368 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2369 encode_compound_hdr(&xdr, req, &hdr);
2370 encode_sequence(&xdr, &args->seq_args, &hdr);
2371 encode_putfh(&xdr, args->dir_fh, &hdr);
2372 encode_lookup(&xdr, args->name, &hdr);
2373 replen = hdr.replen; /* get the attribute into args->page */
2374 encode_fs_locations(&xdr, args->bitmask, &hdr);
2375
2376 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2377 0, PAGE_SIZE);
2378 encode_nops(&hdr);
2379 return 0;
2380 }
2381
2382 #if defined(CONFIG_NFS_V4_1)
2383 /*
2384 * EXCHANGE_ID request
2385 */
2386 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2387 struct nfs41_exchange_id_args *args)
2388 {
2389 struct xdr_stream xdr;
2390 struct compound_hdr hdr = {
2391 .minorversion = args->client->cl_minorversion,
2392 };
2393
2394 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2395 encode_compound_hdr(&xdr, req, &hdr);
2396 encode_exchange_id(&xdr, args, &hdr);
2397 encode_nops(&hdr);
2398 return 0;
2399 }
2400
2401 /*
2402 * a CREATE_SESSION request
2403 */
2404 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2405 struct nfs41_create_session_args *args)
2406 {
2407 struct xdr_stream xdr;
2408 struct compound_hdr hdr = {
2409 .minorversion = args->client->cl_minorversion,
2410 };
2411
2412 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2413 encode_compound_hdr(&xdr, req, &hdr);
2414 encode_create_session(&xdr, args, &hdr);
2415 encode_nops(&hdr);
2416 return 0;
2417 }
2418
2419 /*
2420 * a DESTROY_SESSION request
2421 */
2422 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2423 struct nfs4_session *session)
2424 {
2425 struct xdr_stream xdr;
2426 struct compound_hdr hdr = {
2427 .minorversion = session->clp->cl_minorversion,
2428 };
2429
2430 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2431 encode_compound_hdr(&xdr, req, &hdr);
2432 encode_destroy_session(&xdr, session, &hdr);
2433 encode_nops(&hdr);
2434 return 0;
2435 }
2436
2437 /*
2438 * a SEQUENCE request
2439 */
2440 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2441 struct nfs4_sequence_args *args)
2442 {
2443 struct xdr_stream xdr;
2444 struct compound_hdr hdr = {
2445 .minorversion = nfs4_xdr_minorversion(args),
2446 };
2447
2448 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2449 encode_compound_hdr(&xdr, req, &hdr);
2450 encode_sequence(&xdr, args, &hdr);
2451 encode_nops(&hdr);
2452 return 0;
2453 }
2454
2455 /*
2456 * a GET_LEASE_TIME request
2457 */
2458 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2459 struct nfs4_get_lease_time_args *args)
2460 {
2461 struct xdr_stream xdr;
2462 struct compound_hdr hdr = {
2463 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2464 };
2465 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2466
2467 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2468 encode_compound_hdr(&xdr, req, &hdr);
2469 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2470 encode_putrootfh(&xdr, &hdr);
2471 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2472 encode_nops(&hdr);
2473 return 0;
2474 }
2475
2476 /*
2477 * a RECLAIM_COMPLETE request
2478 */
2479 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2480 struct nfs41_reclaim_complete_args *args)
2481 {
2482 struct xdr_stream xdr;
2483 struct compound_hdr hdr = {
2484 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2485 };
2486
2487 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2488 encode_compound_hdr(&xdr, req, &hdr);
2489 encode_sequence(&xdr, &args->seq_args, &hdr);
2490 encode_reclaim_complete(&xdr, args, &hdr);
2491 encode_nops(&hdr);
2492 return 0;
2493 }
2494
2495 #endif /* CONFIG_NFS_V4_1 */
2496
2497 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2498 {
2499 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2500 "Remaining buffer length is %tu words.\n",
2501 func, xdr->end - xdr->p);
2502 }
2503
2504 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2505 {
2506 __be32 *p;
2507
2508 p = xdr_inline_decode(xdr, 4);
2509 if (unlikely(!p))
2510 goto out_overflow;
2511 *len = be32_to_cpup(p);
2512 p = xdr_inline_decode(xdr, *len);
2513 if (unlikely(!p))
2514 goto out_overflow;
2515 *string = (char *)p;
2516 return 0;
2517 out_overflow:
2518 print_overflow_msg(__func__, xdr);
2519 return -EIO;
2520 }
2521
2522 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2523 {
2524 __be32 *p;
2525
2526 p = xdr_inline_decode(xdr, 8);
2527 if (unlikely(!p))
2528 goto out_overflow;
2529 hdr->status = be32_to_cpup(p++);
2530 hdr->taglen = be32_to_cpup(p);
2531
2532 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2533 if (unlikely(!p))
2534 goto out_overflow;
2535 hdr->tag = (char *)p;
2536 p += XDR_QUADLEN(hdr->taglen);
2537 hdr->nops = be32_to_cpup(p);
2538 if (unlikely(hdr->nops < 1))
2539 return nfs4_stat_to_errno(hdr->status);
2540 return 0;
2541 out_overflow:
2542 print_overflow_msg(__func__, xdr);
2543 return -EIO;
2544 }
2545
2546 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2547 {
2548 __be32 *p;
2549 uint32_t opnum;
2550 int32_t nfserr;
2551
2552 p = xdr_inline_decode(xdr, 8);
2553 if (unlikely(!p))
2554 goto out_overflow;
2555 opnum = be32_to_cpup(p++);
2556 if (opnum != expected) {
2557 dprintk("nfs: Server returned operation"
2558 " %d but we issued a request for %d\n",
2559 opnum, expected);
2560 return -EIO;
2561 }
2562 nfserr = be32_to_cpup(p);
2563 if (nfserr != NFS_OK)
2564 return nfs4_stat_to_errno(nfserr);
2565 return 0;
2566 out_overflow:
2567 print_overflow_msg(__func__, xdr);
2568 return -EIO;
2569 }
2570
2571 /* Dummy routine */
2572 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2573 {
2574 __be32 *p;
2575 unsigned int strlen;
2576 char *str;
2577
2578 p = xdr_inline_decode(xdr, 12);
2579 if (likely(p))
2580 return decode_opaque_inline(xdr, &strlen, &str);
2581 print_overflow_msg(__func__, xdr);
2582 return -EIO;
2583 }
2584
2585 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2586 {
2587 uint32_t bmlen;
2588 __be32 *p;
2589
2590 p = xdr_inline_decode(xdr, 4);
2591 if (unlikely(!p))
2592 goto out_overflow;
2593 bmlen = be32_to_cpup(p);
2594
2595 bitmap[0] = bitmap[1] = 0;
2596 p = xdr_inline_decode(xdr, (bmlen << 2));
2597 if (unlikely(!p))
2598 goto out_overflow;
2599 if (bmlen > 0) {
2600 bitmap[0] = be32_to_cpup(p++);
2601 if (bmlen > 1)
2602 bitmap[1] = be32_to_cpup(p);
2603 }
2604 return 0;
2605 out_overflow:
2606 print_overflow_msg(__func__, xdr);
2607 return -EIO;
2608 }
2609
2610 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2611 {
2612 __be32 *p;
2613
2614 p = xdr_inline_decode(xdr, 4);
2615 if (unlikely(!p))
2616 goto out_overflow;
2617 *attrlen = be32_to_cpup(p);
2618 *savep = xdr->p;
2619 return 0;
2620 out_overflow:
2621 print_overflow_msg(__func__, xdr);
2622 return -EIO;
2623 }
2624
2625 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2626 {
2627 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2628 decode_attr_bitmap(xdr, bitmask);
2629 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2630 } else
2631 bitmask[0] = bitmask[1] = 0;
2632 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2633 return 0;
2634 }
2635
2636 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2637 {
2638 __be32 *p;
2639 int ret = 0;
2640
2641 *type = 0;
2642 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2643 return -EIO;
2644 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2645 p = xdr_inline_decode(xdr, 4);
2646 if (unlikely(!p))
2647 goto out_overflow;
2648 *type = be32_to_cpup(p);
2649 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2650 dprintk("%s: bad type %d\n", __func__, *type);
2651 return -EIO;
2652 }
2653 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2654 ret = NFS_ATTR_FATTR_TYPE;
2655 }
2656 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2657 return ret;
2658 out_overflow:
2659 print_overflow_msg(__func__, xdr);
2660 return -EIO;
2661 }
2662
2663 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2664 {
2665 __be32 *p;
2666 int ret = 0;
2667
2668 *change = 0;
2669 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2670 return -EIO;
2671 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2672 p = xdr_inline_decode(xdr, 8);
2673 if (unlikely(!p))
2674 goto out_overflow;
2675 xdr_decode_hyper(p, change);
2676 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2677 ret = NFS_ATTR_FATTR_CHANGE;
2678 }
2679 dprintk("%s: change attribute=%Lu\n", __func__,
2680 (unsigned long long)*change);
2681 return ret;
2682 out_overflow:
2683 print_overflow_msg(__func__, xdr);
2684 return -EIO;
2685 }
2686
2687 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2688 {
2689 __be32 *p;
2690 int ret = 0;
2691
2692 *size = 0;
2693 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2694 return -EIO;
2695 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2696 p = xdr_inline_decode(xdr, 8);
2697 if (unlikely(!p))
2698 goto out_overflow;
2699 xdr_decode_hyper(p, size);
2700 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2701 ret = NFS_ATTR_FATTR_SIZE;
2702 }
2703 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2704 return ret;
2705 out_overflow:
2706 print_overflow_msg(__func__, xdr);
2707 return -EIO;
2708 }
2709
2710 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2711 {
2712 __be32 *p;
2713
2714 *res = 0;
2715 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2716 return -EIO;
2717 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2718 p = xdr_inline_decode(xdr, 4);
2719 if (unlikely(!p))
2720 goto out_overflow;
2721 *res = be32_to_cpup(p);
2722 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2723 }
2724 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2725 return 0;
2726 out_overflow:
2727 print_overflow_msg(__func__, xdr);
2728 return -EIO;
2729 }
2730
2731 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2732 {
2733 __be32 *p;
2734
2735 *res = 0;
2736 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2737 return -EIO;
2738 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2739 p = xdr_inline_decode(xdr, 4);
2740 if (unlikely(!p))
2741 goto out_overflow;
2742 *res = be32_to_cpup(p);
2743 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2744 }
2745 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2746 return 0;
2747 out_overflow:
2748 print_overflow_msg(__func__, xdr);
2749 return -EIO;
2750 }
2751
2752 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2753 {
2754 __be32 *p;
2755 int ret = 0;
2756
2757 fsid->major = 0;
2758 fsid->minor = 0;
2759 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2760 return -EIO;
2761 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2762 p = xdr_inline_decode(xdr, 16);
2763 if (unlikely(!p))
2764 goto out_overflow;
2765 p = xdr_decode_hyper(p, &fsid->major);
2766 xdr_decode_hyper(p, &fsid->minor);
2767 bitmap[0] &= ~FATTR4_WORD0_FSID;
2768 ret = NFS_ATTR_FATTR_FSID;
2769 }
2770 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2771 (unsigned long long)fsid->major,
2772 (unsigned long long)fsid->minor);
2773 return ret;
2774 out_overflow:
2775 print_overflow_msg(__func__, xdr);
2776 return -EIO;
2777 }
2778
2779 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2780 {
2781 __be32 *p;
2782
2783 *res = 60;
2784 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2785 return -EIO;
2786 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2787 p = xdr_inline_decode(xdr, 4);
2788 if (unlikely(!p))
2789 goto out_overflow;
2790 *res = be32_to_cpup(p);
2791 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2792 }
2793 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2794 return 0;
2795 out_overflow:
2796 print_overflow_msg(__func__, xdr);
2797 return -EIO;
2798 }
2799
2800 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2801 {
2802 __be32 *p;
2803
2804 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2805 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2806 return -EIO;
2807 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2808 p = xdr_inline_decode(xdr, 4);
2809 if (unlikely(!p))
2810 goto out_overflow;
2811 *res = be32_to_cpup(p);
2812 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2813 }
2814 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2815 return 0;
2816 out_overflow:
2817 print_overflow_msg(__func__, xdr);
2818 return -EIO;
2819 }
2820
2821 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2822 {
2823 __be32 *p;
2824 int ret = 0;
2825
2826 *fileid = 0;
2827 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2828 return -EIO;
2829 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2830 p = xdr_inline_decode(xdr, 8);
2831 if (unlikely(!p))
2832 goto out_overflow;
2833 xdr_decode_hyper(p, fileid);
2834 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2835 ret = NFS_ATTR_FATTR_FILEID;
2836 }
2837 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2838 return ret;
2839 out_overflow:
2840 print_overflow_msg(__func__, xdr);
2841 return -EIO;
2842 }
2843
2844 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2845 {
2846 __be32 *p;
2847 int ret = 0;
2848
2849 *fileid = 0;
2850 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2851 return -EIO;
2852 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2853 p = xdr_inline_decode(xdr, 8);
2854 if (unlikely(!p))
2855 goto out_overflow;
2856 xdr_decode_hyper(p, fileid);
2857 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2858 ret = NFS_ATTR_FATTR_FILEID;
2859 }
2860 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2861 return ret;
2862 out_overflow:
2863 print_overflow_msg(__func__, xdr);
2864 return -EIO;
2865 }
2866
2867 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2868 {
2869 __be32 *p;
2870 int status = 0;
2871
2872 *res = 0;
2873 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2874 return -EIO;
2875 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2876 p = xdr_inline_decode(xdr, 8);
2877 if (unlikely(!p))
2878 goto out_overflow;
2879 xdr_decode_hyper(p, res);
2880 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2881 }
2882 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2883 return status;
2884 out_overflow:
2885 print_overflow_msg(__func__, xdr);
2886 return -EIO;
2887 }
2888
2889 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2890 {
2891 __be32 *p;
2892 int status = 0;
2893
2894 *res = 0;
2895 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2896 return -EIO;
2897 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2898 p = xdr_inline_decode(xdr, 8);
2899 if (unlikely(!p))
2900 goto out_overflow;
2901 xdr_decode_hyper(p, res);
2902 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2903 }
2904 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2905 return status;
2906 out_overflow:
2907 print_overflow_msg(__func__, xdr);
2908 return -EIO;
2909 }
2910
2911 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2912 {
2913 __be32 *p;
2914 int status = 0;
2915
2916 *res = 0;
2917 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2918 return -EIO;
2919 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2920 p = xdr_inline_decode(xdr, 8);
2921 if (unlikely(!p))
2922 goto out_overflow;
2923 xdr_decode_hyper(p, res);
2924 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2925 }
2926 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2927 return status;
2928 out_overflow:
2929 print_overflow_msg(__func__, xdr);
2930 return -EIO;
2931 }
2932
2933 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2934 {
2935 u32 n;
2936 __be32 *p;
2937 int status = 0;
2938
2939 p = xdr_inline_decode(xdr, 4);
2940 if (unlikely(!p))
2941 goto out_overflow;
2942 n = be32_to_cpup(p);
2943 if (n == 0)
2944 goto root_path;
2945 dprintk("path ");
2946 path->ncomponents = 0;
2947 while (path->ncomponents < n) {
2948 struct nfs4_string *component = &path->components[path->ncomponents];
2949 status = decode_opaque_inline(xdr, &component->len, &component->data);
2950 if (unlikely(status != 0))
2951 goto out_eio;
2952 if (path->ncomponents != n)
2953 dprintk("/");
2954 dprintk("%s", component->data);
2955 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2956 path->ncomponents++;
2957 else {
2958 dprintk("cannot parse %d components in path\n", n);
2959 goto out_eio;
2960 }
2961 }
2962 out:
2963 dprintk("\n");
2964 return status;
2965 root_path:
2966 /* a root pathname is sent as a zero component4 */
2967 path->ncomponents = 1;
2968 path->components[0].len=0;
2969 path->components[0].data=NULL;
2970 dprintk("path /\n");
2971 goto out;
2972 out_eio:
2973 dprintk(" status %d", status);
2974 status = -EIO;
2975 goto out;
2976 out_overflow:
2977 print_overflow_msg(__func__, xdr);
2978 return -EIO;
2979 }
2980
2981 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2982 {
2983 int n;
2984 __be32 *p;
2985 int status = -EIO;
2986
2987 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2988 goto out;
2989 status = 0;
2990 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2991 goto out;
2992 dprintk("%s: fsroot ", __func__);
2993 status = decode_pathname(xdr, &res->fs_path);
2994 if (unlikely(status != 0))
2995 goto out;
2996 p = xdr_inline_decode(xdr, 4);
2997 if (unlikely(!p))
2998 goto out_overflow;
2999 n = be32_to_cpup(p);
3000 if (n <= 0)
3001 goto out_eio;
3002 res->nlocations = 0;
3003 while (res->nlocations < n) {
3004 u32 m;
3005 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3006
3007 p = xdr_inline_decode(xdr, 4);
3008 if (unlikely(!p))
3009 goto out_overflow;
3010 m = be32_to_cpup(p);
3011
3012 loc->nservers = 0;
3013 dprintk("%s: servers ", __func__);
3014 while (loc->nservers < m) {
3015 struct nfs4_string *server = &loc->servers[loc->nservers];
3016 status = decode_opaque_inline(xdr, &server->len, &server->data);
3017 if (unlikely(status != 0))
3018 goto out_eio;
3019 dprintk("%s ", server->data);
3020 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3021 loc->nservers++;
3022 else {
3023 unsigned int i;
3024 dprintk("%s: using first %u of %u servers "
3025 "returned for location %u\n",
3026 __func__,
3027 NFS4_FS_LOCATION_MAXSERVERS,
3028 m, res->nlocations);
3029 for (i = loc->nservers; i < m; i++) {
3030 unsigned int len;
3031 char *data;
3032 status = decode_opaque_inline(xdr, &len, &data);
3033 if (unlikely(status != 0))
3034 goto out_eio;
3035 }
3036 }
3037 }
3038 status = decode_pathname(xdr, &loc->rootpath);
3039 if (unlikely(status != 0))
3040 goto out_eio;
3041 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3042 res->nlocations++;
3043 }
3044 if (res->nlocations != 0)
3045 status = NFS_ATTR_FATTR_V4_REFERRAL;
3046 out:
3047 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3048 return status;
3049 out_overflow:
3050 print_overflow_msg(__func__, xdr);
3051 out_eio:
3052 status = -EIO;
3053 goto out;
3054 }
3055
3056 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3057 {
3058 __be32 *p;
3059 int status = 0;
3060
3061 *res = 0;
3062 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3063 return -EIO;
3064 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3065 p = xdr_inline_decode(xdr, 8);
3066 if (unlikely(!p))
3067 goto out_overflow;
3068 xdr_decode_hyper(p, res);
3069 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3070 }
3071 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3072 return status;
3073 out_overflow:
3074 print_overflow_msg(__func__, xdr);
3075 return -EIO;
3076 }
3077
3078 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3079 {
3080 __be32 *p;
3081 int status = 0;
3082
3083 *maxlink = 1;
3084 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3085 return -EIO;
3086 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3087 p = xdr_inline_decode(xdr, 4);
3088 if (unlikely(!p))
3089 goto out_overflow;
3090 *maxlink = be32_to_cpup(p);
3091 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3092 }
3093 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3094 return status;
3095 out_overflow:
3096 print_overflow_msg(__func__, xdr);
3097 return -EIO;
3098 }
3099
3100 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3101 {
3102 __be32 *p;
3103 int status = 0;
3104
3105 *maxname = 1024;
3106 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3107 return -EIO;
3108 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3109 p = xdr_inline_decode(xdr, 4);
3110 if (unlikely(!p))
3111 goto out_overflow;
3112 *maxname = be32_to_cpup(p);
3113 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3114 }
3115 dprintk("%s: maxname=%u\n", __func__, *maxname);
3116 return status;
3117 out_overflow:
3118 print_overflow_msg(__func__, xdr);
3119 return -EIO;
3120 }
3121
3122 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3123 {
3124 __be32 *p;
3125 int status = 0;
3126
3127 *res = 1024;
3128 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3129 return -EIO;
3130 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3131 uint64_t maxread;
3132 p = xdr_inline_decode(xdr, 8);
3133 if (unlikely(!p))
3134 goto out_overflow;
3135 xdr_decode_hyper(p, &maxread);
3136 if (maxread > 0x7FFFFFFF)
3137 maxread = 0x7FFFFFFF;
3138 *res = (uint32_t)maxread;
3139 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3140 }
3141 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3142 return status;
3143 out_overflow:
3144 print_overflow_msg(__func__, xdr);
3145 return -EIO;
3146 }
3147
3148 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3149 {
3150 __be32 *p;
3151 int status = 0;
3152
3153 *res = 1024;
3154 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3155 return -EIO;
3156 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3157 uint64_t maxwrite;
3158 p = xdr_inline_decode(xdr, 8);
3159 if (unlikely(!p))
3160 goto out_overflow;
3161 xdr_decode_hyper(p, &maxwrite);
3162 if (maxwrite > 0x7FFFFFFF)
3163 maxwrite = 0x7FFFFFFF;
3164 *res = (uint32_t)maxwrite;
3165 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3166 }
3167 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3168 return status;
3169 out_overflow:
3170 print_overflow_msg(__func__, xdr);
3171 return -EIO;
3172 }
3173
3174 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3175 {
3176 uint32_t tmp;
3177 __be32 *p;
3178 int ret = 0;
3179
3180 *mode = 0;
3181 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3182 return -EIO;
3183 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3184 p = xdr_inline_decode(xdr, 4);
3185 if (unlikely(!p))
3186 goto out_overflow;
3187 tmp = be32_to_cpup(p);
3188 *mode = tmp & ~S_IFMT;
3189 bitmap[1] &= ~FATTR4_WORD1_MODE;
3190 ret = NFS_ATTR_FATTR_MODE;
3191 }
3192 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3193 return ret;
3194 out_overflow:
3195 print_overflow_msg(__func__, xdr);
3196 return -EIO;
3197 }
3198
3199 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3200 {
3201 __be32 *p;
3202 int ret = 0;
3203
3204 *nlink = 1;
3205 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3206 return -EIO;
3207 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3208 p = xdr_inline_decode(xdr, 4);
3209 if (unlikely(!p))
3210 goto out_overflow;
3211 *nlink = be32_to_cpup(p);
3212 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3213 ret = NFS_ATTR_FATTR_NLINK;
3214 }
3215 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3216 return ret;
3217 out_overflow:
3218 print_overflow_msg(__func__, xdr);
3219 return -EIO;
3220 }
3221
3222 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3223 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3224 {
3225 uint32_t len;
3226 __be32 *p;
3227 int ret = 0;
3228
3229 *uid = -2;
3230 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3231 return -EIO;
3232 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3233 p = xdr_inline_decode(xdr, 4);
3234 if (unlikely(!p))
3235 goto out_overflow;
3236 len = be32_to_cpup(p);
3237 p = xdr_inline_decode(xdr, len);
3238 if (unlikely(!p))
3239 goto out_overflow;
3240 if (!may_sleep) {
3241 /* do nothing */
3242 } else if (len < XDR_MAX_NETOBJ) {
3243 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3244 ret = NFS_ATTR_FATTR_OWNER;
3245 else
3246 dprintk("%s: nfs_map_name_to_uid failed!\n",
3247 __func__);
3248 } else
3249 dprintk("%s: name too long (%u)!\n",
3250 __func__, len);
3251 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3252 }
3253 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3254 return ret;
3255 out_overflow:
3256 print_overflow_msg(__func__, xdr);
3257 return -EIO;
3258 }
3259
3260 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3261 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3262 {
3263 uint32_t len;
3264 __be32 *p;
3265 int ret = 0;
3266
3267 *gid = -2;
3268 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3269 return -EIO;
3270 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3271 p = xdr_inline_decode(xdr, 4);
3272 if (unlikely(!p))
3273 goto out_overflow;
3274 len = be32_to_cpup(p);
3275 p = xdr_inline_decode(xdr, len);
3276 if (unlikely(!p))
3277 goto out_overflow;
3278 if (!may_sleep) {
3279 /* do nothing */
3280 } else if (len < XDR_MAX_NETOBJ) {
3281 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3282 ret = NFS_ATTR_FATTR_GROUP;
3283 else
3284 dprintk("%s: nfs_map_group_to_gid failed!\n",
3285 __func__);
3286 } else
3287 dprintk("%s: name too long (%u)!\n",
3288 __func__, len);
3289 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3290 }
3291 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3292 return ret;
3293 out_overflow:
3294 print_overflow_msg(__func__, xdr);
3295 return -EIO;
3296 }
3297
3298 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3299 {
3300 uint32_t major = 0, minor = 0;
3301 __be32 *p;
3302 int ret = 0;
3303
3304 *rdev = MKDEV(0,0);
3305 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3306 return -EIO;
3307 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3308 dev_t tmp;
3309
3310 p = xdr_inline_decode(xdr, 8);
3311 if (unlikely(!p))
3312 goto out_overflow;
3313 major = be32_to_cpup(p++);
3314 minor = be32_to_cpup(p);
3315 tmp = MKDEV(major, minor);
3316 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3317 *rdev = tmp;
3318 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3319 ret = NFS_ATTR_FATTR_RDEV;
3320 }
3321 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3322 return ret;
3323 out_overflow:
3324 print_overflow_msg(__func__, xdr);
3325 return -EIO;
3326 }
3327
3328 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3329 {
3330 __be32 *p;
3331 int status = 0;
3332
3333 *res = 0;
3334 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3335 return -EIO;
3336 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3337 p = xdr_inline_decode(xdr, 8);
3338 if (unlikely(!p))
3339 goto out_overflow;
3340 xdr_decode_hyper(p, res);
3341 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3342 }
3343 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3344 return status;
3345 out_overflow:
3346 print_overflow_msg(__func__, xdr);
3347 return -EIO;
3348 }
3349
3350 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3351 {
3352 __be32 *p;
3353 int status = 0;
3354
3355 *res = 0;
3356 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3357 return -EIO;
3358 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3359 p = xdr_inline_decode(xdr, 8);
3360 if (unlikely(!p))
3361 goto out_overflow;
3362 xdr_decode_hyper(p, res);
3363 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3364 }
3365 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3366 return status;
3367 out_overflow:
3368 print_overflow_msg(__func__, xdr);
3369 return -EIO;
3370 }
3371
3372 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3373 {
3374 __be32 *p;
3375 int status = 0;
3376
3377 *res = 0;
3378 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3379 return -EIO;
3380 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3381 p = xdr_inline_decode(xdr, 8);
3382 if (unlikely(!p))
3383 goto out_overflow;
3384 xdr_decode_hyper(p, res);
3385 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3386 }
3387 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3388 return status;
3389 out_overflow:
3390 print_overflow_msg(__func__, xdr);
3391 return -EIO;
3392 }
3393
3394 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3395 {
3396 __be32 *p;
3397 int ret = 0;
3398
3399 *used = 0;
3400 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3401 return -EIO;
3402 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3403 p = xdr_inline_decode(xdr, 8);
3404 if (unlikely(!p))
3405 goto out_overflow;
3406 xdr_decode_hyper(p, used);
3407 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3408 ret = NFS_ATTR_FATTR_SPACE_USED;
3409 }
3410 dprintk("%s: space used=%Lu\n", __func__,
3411 (unsigned long long)*used);
3412 return ret;
3413 out_overflow:
3414 print_overflow_msg(__func__, xdr);
3415 return -EIO;
3416 }
3417
3418 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3419 {
3420 __be32 *p;
3421 uint64_t sec;
3422 uint32_t nsec;
3423
3424 p = xdr_inline_decode(xdr, 12);
3425 if (unlikely(!p))
3426 goto out_overflow;
3427 p = xdr_decode_hyper(p, &sec);
3428 nsec = be32_to_cpup(p);
3429 time->tv_sec = (time_t)sec;
3430 time->tv_nsec = (long)nsec;
3431 return 0;
3432 out_overflow:
3433 print_overflow_msg(__func__, xdr);
3434 return -EIO;
3435 }
3436
3437 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3438 {
3439 int status = 0;
3440
3441 time->tv_sec = 0;
3442 time->tv_nsec = 0;
3443 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3444 return -EIO;
3445 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3446 status = decode_attr_time(xdr, time);
3447 if (status == 0)
3448 status = NFS_ATTR_FATTR_ATIME;
3449 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3450 }
3451 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3452 return status;
3453 }
3454
3455 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3456 {
3457 int status = 0;
3458
3459 time->tv_sec = 0;
3460 time->tv_nsec = 0;
3461 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3462 return -EIO;
3463 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3464 status = decode_attr_time(xdr, time);
3465 if (status == 0)
3466 status = NFS_ATTR_FATTR_CTIME;
3467 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3468 }
3469 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3470 return status;
3471 }
3472
3473 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3474 {
3475 int status = 0;
3476
3477 time->tv_sec = 0;
3478 time->tv_nsec = 0;
3479 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3480 return -EIO;
3481 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3482 status = decode_attr_time(xdr, time);
3483 if (status == 0)
3484 status = NFS_ATTR_FATTR_MTIME;
3485 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3486 }
3487 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3488 return status;
3489 }
3490
3491 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3492 {
3493 unsigned int attrwords = XDR_QUADLEN(attrlen);
3494 unsigned int nwords = xdr->p - savep;
3495
3496 if (unlikely(attrwords != nwords)) {
3497 dprintk("%s: server returned incorrect attribute length: "
3498 "%u %c %u\n",
3499 __func__,
3500 attrwords << 2,
3501 (attrwords < nwords) ? '<' : '>',
3502 nwords << 2);
3503 return -EIO;
3504 }
3505 return 0;
3506 }
3507
3508 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3509 {
3510 __be32 *p;
3511
3512 p = xdr_inline_decode(xdr, 20);
3513 if (unlikely(!p))
3514 goto out_overflow;
3515 cinfo->atomic = be32_to_cpup(p++);
3516 p = xdr_decode_hyper(p, &cinfo->before);
3517 xdr_decode_hyper(p, &cinfo->after);
3518 return 0;
3519 out_overflow:
3520 print_overflow_msg(__func__, xdr);
3521 return -EIO;
3522 }
3523
3524 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3525 {
3526 __be32 *p;
3527 uint32_t supp, acc;
3528 int status;
3529
3530 status = decode_op_hdr(xdr, OP_ACCESS);
3531 if (status)
3532 return status;
3533 p = xdr_inline_decode(xdr, 8);
3534 if (unlikely(!p))
3535 goto out_overflow;
3536 supp = be32_to_cpup(p++);
3537 acc = be32_to_cpup(p);
3538 access->supported = supp;
3539 access->access = acc;
3540 return 0;
3541 out_overflow:
3542 print_overflow_msg(__func__, xdr);
3543 return -EIO;
3544 }
3545
3546 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3547 {
3548 __be32 *p;
3549
3550 p = xdr_inline_decode(xdr, len);
3551 if (likely(p)) {
3552 memcpy(buf, p, len);
3553 return 0;
3554 }
3555 print_overflow_msg(__func__, xdr);
3556 return -EIO;
3557 }
3558
3559 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3560 {
3561 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3562 }
3563
3564 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3565 {
3566 int status;
3567
3568 status = decode_op_hdr(xdr, OP_CLOSE);
3569 if (status != -EIO)
3570 nfs_increment_open_seqid(status, res->seqid);
3571 if (!status)
3572 status = decode_stateid(xdr, &res->stateid);
3573 return status;
3574 }
3575
3576 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3577 {
3578 return decode_opaque_fixed(xdr, verifier, 8);
3579 }
3580
3581 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3582 {
3583 int status;
3584
3585 status = decode_op_hdr(xdr, OP_COMMIT);
3586 if (!status)
3587 status = decode_verifier(xdr, res->verf->verifier);
3588 return status;
3589 }
3590
3591 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3592 {
3593 __be32 *p;
3594 uint32_t bmlen;
3595 int status;
3596
3597 status = decode_op_hdr(xdr, OP_CREATE);
3598 if (status)
3599 return status;
3600 if ((status = decode_change_info(xdr, cinfo)))
3601 return status;
3602 p = xdr_inline_decode(xdr, 4);
3603 if (unlikely(!p))
3604 goto out_overflow;
3605 bmlen = be32_to_cpup(p);
3606 p = xdr_inline_decode(xdr, bmlen << 2);
3607 if (likely(p))
3608 return 0;
3609 out_overflow:
3610 print_overflow_msg(__func__, xdr);
3611 return -EIO;
3612 }
3613
3614 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3615 {
3616 __be32 *savep;
3617 uint32_t attrlen, bitmap[2] = {0};
3618 int status;
3619
3620 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3621 goto xdr_error;
3622 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3623 goto xdr_error;
3624 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3625 goto xdr_error;
3626 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3627 goto xdr_error;
3628 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3629 goto xdr_error;
3630 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3631 goto xdr_error;
3632 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3633 goto xdr_error;
3634 status = verify_attr_len(xdr, savep, attrlen);
3635 xdr_error:
3636 dprintk("%s: xdr returned %d!\n", __func__, -status);
3637 return status;
3638 }
3639
3640 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3641 {
3642 __be32 *savep;
3643 uint32_t attrlen, bitmap[2] = {0};
3644 int status;
3645
3646 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3647 goto xdr_error;
3648 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3649 goto xdr_error;
3650 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3651 goto xdr_error;
3652
3653 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3654 goto xdr_error;
3655 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3656 goto xdr_error;
3657 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3658 goto xdr_error;
3659 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3660 goto xdr_error;
3661 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3662 goto xdr_error;
3663 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3664 goto xdr_error;
3665
3666 status = verify_attr_len(xdr, savep, attrlen);
3667 xdr_error:
3668 dprintk("%s: xdr returned %d!\n", __func__, -status);
3669 return status;
3670 }
3671
3672 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3673 {
3674 __be32 *savep;
3675 uint32_t attrlen, bitmap[2] = {0};
3676 int status;
3677
3678 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3679 goto xdr_error;
3680 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3681 goto xdr_error;
3682 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3683 goto xdr_error;
3684
3685 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3686 goto xdr_error;
3687 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3688 goto xdr_error;
3689
3690 status = verify_attr_len(xdr, savep, attrlen);
3691 xdr_error:
3692 dprintk("%s: xdr returned %d!\n", __func__, -status);
3693 return status;
3694 }
3695
3696 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3697 const struct nfs_server *server, int may_sleep)
3698 {
3699 __be32 *savep;
3700 uint32_t attrlen,
3701 bitmap[2] = {0},
3702 type;
3703 int status;
3704 umode_t fmode = 0;
3705 uint64_t fileid;
3706
3707 status = decode_op_hdr(xdr, OP_GETATTR);
3708 if (status < 0)
3709 goto xdr_error;
3710
3711 status = decode_attr_bitmap(xdr, bitmap);
3712 if (status < 0)
3713 goto xdr_error;
3714
3715 status = decode_attr_length(xdr, &attrlen, &savep);
3716 if (status < 0)
3717 goto xdr_error;
3718
3719
3720 status = decode_attr_type(xdr, bitmap, &type);
3721 if (status < 0)
3722 goto xdr_error;
3723 fattr->mode = 0;
3724 if (status != 0) {
3725 fattr->mode |= nfs_type2fmt[type];
3726 fattr->valid |= status;
3727 }
3728
3729 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3730 if (status < 0)
3731 goto xdr_error;
3732 fattr->valid |= status;
3733
3734 status = decode_attr_size(xdr, bitmap, &fattr->size);
3735 if (status < 0)
3736 goto xdr_error;
3737 fattr->valid |= status;
3738
3739 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3740 if (status < 0)
3741 goto xdr_error;
3742 fattr->valid |= status;
3743
3744 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3745 if (status < 0)
3746 goto xdr_error;
3747 fattr->valid |= status;
3748
3749 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3750 struct nfs4_fs_locations,
3751 fattr));
3752 if (status < 0)
3753 goto xdr_error;
3754 fattr->valid |= status;
3755
3756 status = decode_attr_mode(xdr, bitmap, &fmode);
3757 if (status < 0)
3758 goto xdr_error;
3759 if (status != 0) {
3760 fattr->mode |= fmode;
3761 fattr->valid |= status;
3762 }
3763
3764 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3765 if (status < 0)
3766 goto xdr_error;
3767 fattr->valid |= status;
3768
3769 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3770 &fattr->uid, may_sleep);
3771 if (status < 0)
3772 goto xdr_error;
3773 fattr->valid |= status;
3774
3775 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3776 &fattr->gid, may_sleep);
3777 if (status < 0)
3778 goto xdr_error;
3779 fattr->valid |= status;
3780
3781 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3782 if (status < 0)
3783 goto xdr_error;
3784 fattr->valid |= status;
3785
3786 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3787 if (status < 0)
3788 goto xdr_error;
3789 fattr->valid |= status;
3790
3791 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3792 if (status < 0)
3793 goto xdr_error;
3794 fattr->valid |= status;
3795
3796 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3797 if (status < 0)
3798 goto xdr_error;
3799 fattr->valid |= status;
3800
3801 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3802 if (status < 0)
3803 goto xdr_error;
3804 fattr->valid |= status;
3805
3806 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3807 if (status < 0)
3808 goto xdr_error;
3809 if (status != 0 && !(fattr->valid & status)) {
3810 fattr->fileid = fileid;
3811 fattr->valid |= status;
3812 }
3813
3814 status = verify_attr_len(xdr, savep, attrlen);
3815 xdr_error:
3816 dprintk("%s: xdr returned %d\n", __func__, -status);
3817 return status;
3818 }
3819
3820
3821 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3822 {
3823 __be32 *savep;
3824 uint32_t attrlen, bitmap[2];
3825 int status;
3826
3827 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3828 goto xdr_error;
3829 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3830 goto xdr_error;
3831 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3832 goto xdr_error;
3833
3834 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3835
3836 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3837 goto xdr_error;
3838 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3839 goto xdr_error;
3840 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3841 goto xdr_error;
3842 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3843 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3844 goto xdr_error;
3845 fsinfo->wtpref = fsinfo->wtmax;
3846
3847 status = verify_attr_len(xdr, savep, attrlen);
3848 xdr_error:
3849 dprintk("%s: xdr returned %d!\n", __func__, -status);
3850 return status;
3851 }
3852
3853 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3854 {
3855 __be32 *p;
3856 uint32_t len;
3857 int status;
3858
3859 /* Zero handle first to allow comparisons */
3860 memset(fh, 0, sizeof(*fh));
3861
3862 status = decode_op_hdr(xdr, OP_GETFH);
3863 if (status)
3864 return status;
3865
3866 p = xdr_inline_decode(xdr, 4);
3867 if (unlikely(!p))
3868 goto out_overflow;
3869 len = be32_to_cpup(p);
3870 if (len > NFS4_FHSIZE)
3871 return -EIO;
3872 fh->size = len;
3873 p = xdr_inline_decode(xdr, len);
3874 if (unlikely(!p))
3875 goto out_overflow;
3876 memcpy(fh->data, p, len);
3877 return 0;
3878 out_overflow:
3879 print_overflow_msg(__func__, xdr);
3880 return -EIO;
3881 }
3882
3883 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3884 {
3885 int status;
3886
3887 status = decode_op_hdr(xdr, OP_LINK);
3888 if (status)
3889 return status;
3890 return decode_change_info(xdr, cinfo);
3891 }
3892
3893 /*
3894 * We create the owner, so we know a proper owner.id length is 4.
3895 */
3896 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3897 {
3898 uint64_t offset, length, clientid;
3899 __be32 *p;
3900 uint32_t namelen, type;
3901
3902 p = xdr_inline_decode(xdr, 32);
3903 if (unlikely(!p))
3904 goto out_overflow;
3905 p = xdr_decode_hyper(p, &offset);
3906 p = xdr_decode_hyper(p, &length);
3907 type = be32_to_cpup(p++);
3908 if (fl != NULL) {
3909 fl->fl_start = (loff_t)offset;
3910 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3911 if (length == ~(uint64_t)0)
3912 fl->fl_end = OFFSET_MAX;
3913 fl->fl_type = F_WRLCK;
3914 if (type & 1)
3915 fl->fl_type = F_RDLCK;
3916 fl->fl_pid = 0;
3917 }
3918 p = xdr_decode_hyper(p, &clientid);
3919 namelen = be32_to_cpup(p);
3920 p = xdr_inline_decode(xdr, namelen);
3921 if (likely(p))
3922 return -NFS4ERR_DENIED;
3923 out_overflow:
3924 print_overflow_msg(__func__, xdr);
3925 return -EIO;
3926 }
3927
3928 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3929 {
3930 int status;
3931
3932 status = decode_op_hdr(xdr, OP_LOCK);
3933 if (status == -EIO)
3934 goto out;
3935 if (status == 0) {
3936 status = decode_stateid(xdr, &res->stateid);
3937 if (unlikely(status))
3938 goto out;
3939 } else if (status == -NFS4ERR_DENIED)
3940 status = decode_lock_denied(xdr, NULL);
3941 if (res->open_seqid != NULL)
3942 nfs_increment_open_seqid(status, res->open_seqid);
3943 nfs_increment_lock_seqid(status, res->lock_seqid);
3944 out:
3945 return status;
3946 }
3947
3948 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3949 {
3950 int status;
3951 status = decode_op_hdr(xdr, OP_LOCKT);
3952 if (status == -NFS4ERR_DENIED)
3953 return decode_lock_denied(xdr, res->denied);
3954 return status;
3955 }
3956
3957 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3958 {
3959 int status;
3960
3961 status = decode_op_hdr(xdr, OP_LOCKU);
3962 if (status != -EIO)
3963 nfs_increment_lock_seqid(status, res->seqid);
3964 if (status == 0)
3965 status = decode_stateid(xdr, &res->stateid);
3966 return status;
3967 }
3968
3969 static int decode_lookup(struct xdr_stream *xdr)
3970 {
3971 return decode_op_hdr(xdr, OP_LOOKUP);
3972 }
3973
3974 /* This is too sick! */
3975 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3976 {
3977 __be32 *p;
3978 uint32_t limit_type, nblocks, blocksize;
3979
3980 p = xdr_inline_decode(xdr, 12);
3981 if (unlikely(!p))
3982 goto out_overflow;
3983 limit_type = be32_to_cpup(p++);
3984 switch (limit_type) {
3985 case 1:
3986 xdr_decode_hyper(p, maxsize);
3987 break;
3988 case 2:
3989 nblocks = be32_to_cpup(p++);
3990 blocksize = be32_to_cpup(p);
3991 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3992 }
3993 return 0;
3994 out_overflow:
3995 print_overflow_msg(__func__, xdr);
3996 return -EIO;
3997 }
3998
3999 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4000 {
4001 __be32 *p;
4002 uint32_t delegation_type;
4003 int status;
4004
4005 p = xdr_inline_decode(xdr, 4);
4006 if (unlikely(!p))
4007 goto out_overflow;
4008 delegation_type = be32_to_cpup(p);
4009 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4010 res->delegation_type = 0;
4011 return 0;
4012 }
4013 status = decode_stateid(xdr, &res->delegation);
4014 if (unlikely(status))
4015 return status;
4016 p = xdr_inline_decode(xdr, 4);
4017 if (unlikely(!p))
4018 goto out_overflow;
4019 res->do_recall = be32_to_cpup(p);
4020
4021 switch (delegation_type) {
4022 case NFS4_OPEN_DELEGATE_READ:
4023 res->delegation_type = FMODE_READ;
4024 break;
4025 case NFS4_OPEN_DELEGATE_WRITE:
4026 res->delegation_type = FMODE_WRITE|FMODE_READ;
4027 if (decode_space_limit(xdr, &res->maxsize) < 0)
4028 return -EIO;
4029 }
4030 return decode_ace(xdr, NULL, res->server->nfs_client);
4031 out_overflow:
4032 print_overflow_msg(__func__, xdr);
4033 return -EIO;
4034 }
4035
4036 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4037 {
4038 __be32 *p;
4039 uint32_t savewords, bmlen, i;
4040 int status;
4041
4042 status = decode_op_hdr(xdr, OP_OPEN);
4043 if (status != -EIO)
4044 nfs_increment_open_seqid(status, res->seqid);
4045 if (!status)
4046 status = decode_stateid(xdr, &res->stateid);
4047 if (unlikely(status))
4048 return status;
4049
4050 decode_change_info(xdr, &res->cinfo);
4051
4052 p = xdr_inline_decode(xdr, 8);
4053 if (unlikely(!p))
4054 goto out_overflow;
4055 res->rflags = be32_to_cpup(p++);
4056 bmlen = be32_to_cpup(p);
4057 if (bmlen > 10)
4058 goto xdr_error;
4059
4060 p = xdr_inline_decode(xdr, bmlen << 2);
4061 if (unlikely(!p))
4062 goto out_overflow;
4063 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4064 for (i = 0; i < savewords; ++i)
4065 res->attrset[i] = be32_to_cpup(p++);
4066 for (; i < NFS4_BITMAP_SIZE; i++)
4067 res->attrset[i] = 0;
4068
4069 return decode_delegation(xdr, res);
4070 xdr_error:
4071 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4072 return -EIO;
4073 out_overflow:
4074 print_overflow_msg(__func__, xdr);
4075 return -EIO;
4076 }
4077
4078 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4079 {
4080 int status;
4081
4082 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4083 if (status != -EIO)
4084 nfs_increment_open_seqid(status, res->seqid);
4085 if (!status)
4086 status = decode_stateid(xdr, &res->stateid);
4087 return status;
4088 }
4089
4090 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4091 {
4092 int status;
4093
4094 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4095 if (status != -EIO)
4096 nfs_increment_open_seqid(status, res->seqid);
4097 if (!status)
4098 status = decode_stateid(xdr, &res->stateid);
4099 return status;
4100 }
4101
4102 static int decode_putfh(struct xdr_stream *xdr)
4103 {
4104 return decode_op_hdr(xdr, OP_PUTFH);
4105 }
4106
4107 static int decode_putrootfh(struct xdr_stream *xdr)
4108 {
4109 return decode_op_hdr(xdr, OP_PUTROOTFH);
4110 }
4111
4112 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4113 {
4114 struct kvec *iov = req->rq_rcv_buf.head;
4115 __be32 *p;
4116 uint32_t count, eof, recvd, hdrlen;
4117 int status;
4118
4119 status = decode_op_hdr(xdr, OP_READ);
4120 if (status)
4121 return status;
4122 p = xdr_inline_decode(xdr, 8);
4123 if (unlikely(!p))
4124 goto out_overflow;
4125 eof = be32_to_cpup(p++);
4126 count = be32_to_cpup(p);
4127 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4128 recvd = req->rq_rcv_buf.len - hdrlen;
4129 if (count > recvd) {
4130 dprintk("NFS: server cheating in read reply: "
4131 "count %u > recvd %u\n", count, recvd);
4132 count = recvd;
4133 eof = 0;
4134 }
4135 xdr_read_pages(xdr, count);
4136 res->eof = eof;
4137 res->count = count;
4138 return 0;
4139 out_overflow:
4140 print_overflow_msg(__func__, xdr);
4141 return -EIO;
4142 }
4143
4144 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4145 {
4146 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4147 struct page *page = *rcvbuf->pages;
4148 struct kvec *iov = rcvbuf->head;
4149 size_t hdrlen;
4150 u32 recvd, pglen = rcvbuf->page_len;
4151 __be32 *end, *entry, *p, *kaddr;
4152 unsigned int nr = 0;
4153 int status;
4154
4155 status = decode_op_hdr(xdr, OP_READDIR);
4156 if (!status)
4157 status = decode_verifier(xdr, readdir->verifier.data);
4158 if (unlikely(status))
4159 return status;
4160 dprintk("%s: verifier = %08x:%08x\n",
4161 __func__,
4162 ((u32 *)readdir->verifier.data)[0],
4163 ((u32 *)readdir->verifier.data)[1]);
4164
4165
4166 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4167 recvd = rcvbuf->len - hdrlen;
4168 if (pglen > recvd)
4169 pglen = recvd;
4170 xdr_read_pages(xdr, pglen);
4171
4172 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4173 kaddr = p = kmap_atomic(page, KM_USER0);
4174 end = p + ((pglen + readdir->pgbase) >> 2);
4175 entry = p;
4176
4177 /* Make sure the packet actually has a value_follows and EOF entry */
4178 if ((entry + 1) > end)
4179 goto short_pkt;
4180
4181 for (; *p++; nr++) {
4182 u32 len, attrlen, xlen;
4183 if (end - p < 3)
4184 goto short_pkt;
4185 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4186 p += 2; /* cookie */
4187 len = ntohl(*p++); /* filename length */
4188 if (len > NFS4_MAXNAMLEN) {
4189 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4190 len);
4191 goto err_unmap;
4192 }
4193 xlen = XDR_QUADLEN(len);
4194 if (end - p < xlen + 1)
4195 goto short_pkt;
4196 dprintk("filename = %*s\n", len, (char *)p);
4197 p += xlen;
4198 len = ntohl(*p++); /* bitmap length */
4199 if (end - p < len + 1)
4200 goto short_pkt;
4201 p += len;
4202 attrlen = XDR_QUADLEN(ntohl(*p++));
4203 if (end - p < attrlen + 2)
4204 goto short_pkt;
4205 p += attrlen; /* attributes */
4206 entry = p;
4207 }
4208 /*
4209 * Apparently some server sends responses that are a valid size, but
4210 * contain no entries, and have value_follows==0 and EOF==0. For
4211 * those, just set the EOF marker.
4212 */
4213 if (!nr && entry[1] == 0) {
4214 dprintk("NFS: readdir reply truncated!\n");
4215 entry[1] = 1;
4216 }
4217 out:
4218 kunmap_atomic(kaddr, KM_USER0);
4219 return 0;
4220 short_pkt:
4221 /*
4222 * When we get a short packet there are 2 possibilities. We can
4223 * return an error, or fix up the response to look like a valid
4224 * response and return what we have so far. If there are no
4225 * entries and the packet was short, then return -EIO. If there
4226 * are valid entries in the response, return them and pretend that
4227 * the call was successful, but incomplete. The caller can retry the
4228 * readdir starting at the last cookie.
4229 */
4230 dprintk("%s: short packet at entry %d\n", __func__, nr);
4231 entry[0] = entry[1] = 0;
4232 if (nr)
4233 goto out;
4234 err_unmap:
4235 kunmap_atomic(kaddr, KM_USER0);
4236 return -errno_NFSERR_IO;
4237 }
4238
4239 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4240 {
4241 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4242 struct kvec *iov = rcvbuf->head;
4243 size_t hdrlen;
4244 u32 len, recvd;
4245 __be32 *p;
4246 char *kaddr;
4247 int status;
4248
4249 status = decode_op_hdr(xdr, OP_READLINK);
4250 if (status)
4251 return status;
4252
4253 /* Convert length of symlink */
4254 p = xdr_inline_decode(xdr, 4);
4255 if (unlikely(!p))
4256 goto out_overflow;
4257 len = be32_to_cpup(p);
4258 if (len >= rcvbuf->page_len || len <= 0) {
4259 dprintk("nfs: server returned giant symlink!\n");
4260 return -ENAMETOOLONG;
4261 }
4262 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4263 recvd = req->rq_rcv_buf.len - hdrlen;
4264 if (recvd < len) {
4265 dprintk("NFS: server cheating in readlink reply: "
4266 "count %u > recvd %u\n", len, recvd);
4267 return -EIO;
4268 }
4269 xdr_read_pages(xdr, len);
4270 /*
4271 * The XDR encode routine has set things up so that
4272 * the link text will be copied directly into the
4273 * buffer. We just have to do overflow-checking,
4274 * and and null-terminate the text (the VFS expects
4275 * null-termination).
4276 */
4277 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4278 kaddr[len+rcvbuf->page_base] = '\0';
4279 kunmap_atomic(kaddr, KM_USER0);
4280 return 0;
4281 out_overflow:
4282 print_overflow_msg(__func__, xdr);
4283 return -EIO;
4284 }
4285
4286 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4287 {
4288 int status;
4289
4290 status = decode_op_hdr(xdr, OP_REMOVE);
4291 if (status)
4292 goto out;
4293 status = decode_change_info(xdr, cinfo);
4294 out:
4295 return status;
4296 }
4297
4298 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4299 struct nfs4_change_info *new_cinfo)
4300 {
4301 int status;
4302
4303 status = decode_op_hdr(xdr, OP_RENAME);
4304 if (status)
4305 goto out;
4306 if ((status = decode_change_info(xdr, old_cinfo)))
4307 goto out;
4308 status = decode_change_info(xdr, new_cinfo);
4309 out:
4310 return status;
4311 }
4312
4313 static int decode_renew(struct xdr_stream *xdr)
4314 {
4315 return decode_op_hdr(xdr, OP_RENEW);
4316 }
4317
4318 static int
4319 decode_restorefh(struct xdr_stream *xdr)
4320 {
4321 return decode_op_hdr(xdr, OP_RESTOREFH);
4322 }
4323
4324 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4325 size_t *acl_len)
4326 {
4327 __be32 *savep;
4328 uint32_t attrlen,
4329 bitmap[2] = {0};
4330 struct kvec *iov = req->rq_rcv_buf.head;
4331 int status;
4332
4333 *acl_len = 0;
4334 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4335 goto out;
4336 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4337 goto out;
4338 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4339 goto out;
4340
4341 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4342 return -EIO;
4343 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4344 size_t hdrlen;
4345 u32 recvd;
4346
4347 /* We ignore &savep and don't do consistency checks on
4348 * the attr length. Let userspace figure it out.... */
4349 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4350 recvd = req->rq_rcv_buf.len - hdrlen;
4351 if (attrlen > recvd) {
4352 dprintk("NFS: server cheating in getattr"
4353 " acl reply: attrlen %u > recvd %u\n",
4354 attrlen, recvd);
4355 return -EINVAL;
4356 }
4357 xdr_read_pages(xdr, attrlen);
4358 *acl_len = attrlen;
4359 } else
4360 status = -EOPNOTSUPP;
4361
4362 out:
4363 return status;
4364 }
4365
4366 static int
4367 decode_savefh(struct xdr_stream *xdr)
4368 {
4369 return decode_op_hdr(xdr, OP_SAVEFH);
4370 }
4371
4372 static int decode_setattr(struct xdr_stream *xdr)
4373 {
4374 __be32 *p;
4375 uint32_t bmlen;
4376 int status;
4377
4378 status = decode_op_hdr(xdr, OP_SETATTR);
4379 if (status)
4380 return status;
4381 p = xdr_inline_decode(xdr, 4);
4382 if (unlikely(!p))
4383 goto out_overflow;
4384 bmlen = be32_to_cpup(p);
4385 p = xdr_inline_decode(xdr, bmlen << 2);
4386 if (likely(p))
4387 return 0;
4388 out_overflow:
4389 print_overflow_msg(__func__, xdr);
4390 return -EIO;
4391 }
4392
4393 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4394 {
4395 __be32 *p;
4396 uint32_t opnum;
4397 int32_t nfserr;
4398
4399 p = xdr_inline_decode(xdr, 8);
4400 if (unlikely(!p))
4401 goto out_overflow;
4402 opnum = be32_to_cpup(p++);
4403 if (opnum != OP_SETCLIENTID) {
4404 dprintk("nfs: decode_setclientid: Server returned operation"
4405 " %d\n", opnum);
4406 return -EIO;
4407 }
4408 nfserr = be32_to_cpup(p);
4409 if (nfserr == NFS_OK) {
4410 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4411 if (unlikely(!p))
4412 goto out_overflow;
4413 p = xdr_decode_hyper(p, &clp->cl_clientid);
4414 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4415 } else if (nfserr == NFSERR_CLID_INUSE) {
4416 uint32_t len;
4417
4418 /* skip netid string */
4419 p = xdr_inline_decode(xdr, 4);
4420 if (unlikely(!p))
4421 goto out_overflow;
4422 len = be32_to_cpup(p);
4423 p = xdr_inline_decode(xdr, len);
4424 if (unlikely(!p))
4425 goto out_overflow;
4426
4427 /* skip uaddr string */
4428 p = xdr_inline_decode(xdr, 4);
4429 if (unlikely(!p))
4430 goto out_overflow;
4431 len = be32_to_cpup(p);
4432 p = xdr_inline_decode(xdr, len);
4433 if (unlikely(!p))
4434 goto out_overflow;
4435 return -NFSERR_CLID_INUSE;
4436 } else
4437 return nfs4_stat_to_errno(nfserr);
4438
4439 return 0;
4440 out_overflow:
4441 print_overflow_msg(__func__, xdr);
4442 return -EIO;
4443 }
4444
4445 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4446 {
4447 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4448 }
4449
4450 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4451 {
4452 __be32 *p;
4453 int status;
4454
4455 status = decode_op_hdr(xdr, OP_WRITE);
4456 if (status)
4457 return status;
4458
4459 p = xdr_inline_decode(xdr, 16);
4460 if (unlikely(!p))
4461 goto out_overflow;
4462 res->count = be32_to_cpup(p++);
4463 res->verf->committed = be32_to_cpup(p++);
4464 memcpy(res->verf->verifier, p, 8);
4465 return 0;
4466 out_overflow:
4467 print_overflow_msg(__func__, xdr);
4468 return -EIO;
4469 }
4470
4471 static int decode_delegreturn(struct xdr_stream *xdr)
4472 {
4473 return decode_op_hdr(xdr, OP_DELEGRETURN);
4474 }
4475
4476 #if defined(CONFIG_NFS_V4_1)
4477 static int decode_exchange_id(struct xdr_stream *xdr,
4478 struct nfs41_exchange_id_res *res)
4479 {
4480 __be32 *p;
4481 uint32_t dummy;
4482 char *dummy_str;
4483 int status;
4484 struct nfs_client *clp = res->client;
4485
4486 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4487 if (status)
4488 return status;
4489
4490 p = xdr_inline_decode(xdr, 8);
4491 if (unlikely(!p))
4492 goto out_overflow;
4493 xdr_decode_hyper(p, &clp->cl_ex_clid);
4494 p = xdr_inline_decode(xdr, 12);
4495 if (unlikely(!p))
4496 goto out_overflow;
4497 clp->cl_seqid = be32_to_cpup(p++);
4498 clp->cl_exchange_flags = be32_to_cpup(p++);
4499
4500 /* We ask for SP4_NONE */
4501 dummy = be32_to_cpup(p);
4502 if (dummy != SP4_NONE)
4503 return -EIO;
4504
4505 /* Throw away minor_id */
4506 p = xdr_inline_decode(xdr, 8);
4507 if (unlikely(!p))
4508 goto out_overflow;
4509
4510 /* Throw away Major id */
4511 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4512 if (unlikely(status))
4513 return status;
4514
4515 /* Throw away server_scope */
4516 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4517 if (unlikely(status))
4518 return status;
4519
4520 /* Throw away Implementation id array */
4521 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4522 if (unlikely(status))
4523 return status;
4524
4525 return 0;
4526 out_overflow:
4527 print_overflow_msg(__func__, xdr);
4528 return -EIO;
4529 }
4530
4531 static int decode_chan_attrs(struct xdr_stream *xdr,
4532 struct nfs4_channel_attrs *attrs)
4533 {
4534 __be32 *p;
4535 u32 nr_attrs;
4536
4537 p = xdr_inline_decode(xdr, 28);
4538 if (unlikely(!p))
4539 goto out_overflow;
4540 attrs->headerpadsz = be32_to_cpup(p++);
4541 attrs->max_rqst_sz = be32_to_cpup(p++);
4542 attrs->max_resp_sz = be32_to_cpup(p++);
4543 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4544 attrs->max_ops = be32_to_cpup(p++);
4545 attrs->max_reqs = be32_to_cpup(p++);
4546 nr_attrs = be32_to_cpup(p);
4547 if (unlikely(nr_attrs > 1)) {
4548 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4549 __func__, nr_attrs);
4550 return -EINVAL;
4551 }
4552 if (nr_attrs == 1) {
4553 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4554 if (unlikely(!p))
4555 goto out_overflow;
4556 }
4557 return 0;
4558 out_overflow:
4559 print_overflow_msg(__func__, xdr);
4560 return -EIO;
4561 }
4562
4563 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4564 {
4565 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4566 }
4567
4568 static int decode_create_session(struct xdr_stream *xdr,
4569 struct nfs41_create_session_res *res)
4570 {
4571 __be32 *p;
4572 int status;
4573 struct nfs_client *clp = res->client;
4574 struct nfs4_session *session = clp->cl_session;
4575
4576 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4577 if (!status)
4578 status = decode_sessionid(xdr, &session->sess_id);
4579 if (unlikely(status))
4580 return status;
4581
4582 /* seqid, flags */
4583 p = xdr_inline_decode(xdr, 8);
4584 if (unlikely(!p))
4585 goto out_overflow;
4586 clp->cl_seqid = be32_to_cpup(p++);
4587 session->flags = be32_to_cpup(p);
4588
4589 /* Channel attributes */
4590 status = decode_chan_attrs(xdr, &session->fc_attrs);
4591 if (!status)
4592 status = decode_chan_attrs(xdr, &session->bc_attrs);
4593 return status;
4594 out_overflow:
4595 print_overflow_msg(__func__, xdr);
4596 return -EIO;
4597 }
4598
4599 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4600 {
4601 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4602 }
4603
4604 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4605 {
4606 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4607 }
4608 #endif /* CONFIG_NFS_V4_1 */
4609
4610 static int decode_sequence(struct xdr_stream *xdr,
4611 struct nfs4_sequence_res *res,
4612 struct rpc_rqst *rqstp)
4613 {
4614 #if defined(CONFIG_NFS_V4_1)
4615 struct nfs4_slot *slot;
4616 struct nfs4_sessionid id;
4617 u32 dummy;
4618 int status;
4619 __be32 *p;
4620
4621 if (!res->sr_session)
4622 return 0;
4623
4624 status = decode_op_hdr(xdr, OP_SEQUENCE);
4625 if (!status)
4626 status = decode_sessionid(xdr, &id);
4627 if (unlikely(status))
4628 goto out_err;
4629
4630 /*
4631 * If the server returns different values for sessionID, slotID or
4632 * sequence number, the server is looney tunes.
4633 */
4634 status = -EREMOTEIO;
4635
4636 if (memcmp(id.data, res->sr_session->sess_id.data,
4637 NFS4_MAX_SESSIONID_LEN)) {
4638 dprintk("%s Invalid session id\n", __func__);
4639 goto out_err;
4640 }
4641
4642 p = xdr_inline_decode(xdr, 20);
4643 if (unlikely(!p))
4644 goto out_overflow;
4645
4646 /* seqid */
4647 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4648 dummy = be32_to_cpup(p++);
4649 if (dummy != slot->seq_nr) {
4650 dprintk("%s Invalid sequence number\n", __func__);
4651 goto out_err;
4652 }
4653 /* slot id */
4654 dummy = be32_to_cpup(p++);
4655 if (dummy != res->sr_slotid) {
4656 dprintk("%s Invalid slot id\n", __func__);
4657 goto out_err;
4658 }
4659 /* highest slot id - currently not processed */
4660 dummy = be32_to_cpup(p++);
4661 /* target highest slot id - currently not processed */
4662 dummy = be32_to_cpup(p++);
4663 /* result flags */
4664 res->sr_status_flags = be32_to_cpup(p);
4665 status = 0;
4666 out_err:
4667 res->sr_status = status;
4668 return status;
4669 out_overflow:
4670 print_overflow_msg(__func__, xdr);
4671 status = -EIO;
4672 goto out_err;
4673 #else /* CONFIG_NFS_V4_1 */
4674 return 0;
4675 #endif /* CONFIG_NFS_V4_1 */
4676 }
4677
4678 /*
4679 * END OF "GENERIC" DECODE ROUTINES.
4680 */
4681
4682 /*
4683 * Decode OPEN_DOWNGRADE response
4684 */
4685 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4686 {
4687 struct xdr_stream xdr;
4688 struct compound_hdr hdr;
4689 int status;
4690
4691 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4692 status = decode_compound_hdr(&xdr, &hdr);
4693 if (status)
4694 goto out;
4695 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4696 if (status)
4697 goto out;
4698 status = decode_putfh(&xdr);
4699 if (status)
4700 goto out;
4701 status = decode_open_downgrade(&xdr, res);
4702 if (status != 0)
4703 goto out;
4704 decode_getfattr(&xdr, res->fattr, res->server,
4705 !RPC_IS_ASYNC(rqstp->rq_task));
4706 out:
4707 return status;
4708 }
4709
4710 /*
4711 * Decode ACCESS response
4712 */
4713 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4714 {
4715 struct xdr_stream xdr;
4716 struct compound_hdr hdr;
4717 int status;
4718
4719 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4720 status = decode_compound_hdr(&xdr, &hdr);
4721 if (status)
4722 goto out;
4723 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4724 if (status)
4725 goto out;
4726 status = decode_putfh(&xdr);
4727 if (status != 0)
4728 goto out;
4729 status = decode_access(&xdr, res);
4730 if (status != 0)
4731 goto out;
4732 decode_getfattr(&xdr, res->fattr, res->server,
4733 !RPC_IS_ASYNC(rqstp->rq_task));
4734 out:
4735 return status;
4736 }
4737
4738 /*
4739 * Decode LOOKUP response
4740 */
4741 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4742 {
4743 struct xdr_stream xdr;
4744 struct compound_hdr hdr;
4745 int status;
4746
4747 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4748 status = decode_compound_hdr(&xdr, &hdr);
4749 if (status)
4750 goto out;
4751 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4752 if (status)
4753 goto out;
4754 if ((status = decode_putfh(&xdr)) != 0)
4755 goto out;
4756 if ((status = decode_lookup(&xdr)) != 0)
4757 goto out;
4758 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4759 goto out;
4760 status = decode_getfattr(&xdr, res->fattr, res->server
4761 ,!RPC_IS_ASYNC(rqstp->rq_task));
4762 out:
4763 return status;
4764 }
4765
4766 /*
4767 * Decode LOOKUP_ROOT response
4768 */
4769 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4770 {
4771 struct xdr_stream xdr;
4772 struct compound_hdr hdr;
4773 int status;
4774
4775 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4776 status = decode_compound_hdr(&xdr, &hdr);
4777 if (status)
4778 goto out;
4779 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4780 if (status)
4781 goto out;
4782 if ((status = decode_putrootfh(&xdr)) != 0)
4783 goto out;
4784 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4785 status = decode_getfattr(&xdr, res->fattr, res->server,
4786 !RPC_IS_ASYNC(rqstp->rq_task));
4787 out:
4788 return status;
4789 }
4790
4791 /*
4792 * Decode REMOVE response
4793 */
4794 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4795 {
4796 struct xdr_stream xdr;
4797 struct compound_hdr hdr;
4798 int status;
4799
4800 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4801 status = decode_compound_hdr(&xdr, &hdr);
4802 if (status)
4803 goto out;
4804 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4805 if (status)
4806 goto out;
4807 if ((status = decode_putfh(&xdr)) != 0)
4808 goto out;
4809 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4810 goto out;
4811 decode_getfattr(&xdr, &res->dir_attr, res->server,
4812 !RPC_IS_ASYNC(rqstp->rq_task));
4813 out:
4814 return status;
4815 }
4816
4817 /*
4818 * Decode RENAME response
4819 */
4820 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4821 {
4822 struct xdr_stream xdr;
4823 struct compound_hdr hdr;
4824 int status;
4825
4826 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4827 status = decode_compound_hdr(&xdr, &hdr);
4828 if (status)
4829 goto out;
4830 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4831 if (status)
4832 goto out;
4833 if ((status = decode_putfh(&xdr)) != 0)
4834 goto out;
4835 if ((status = decode_savefh(&xdr)) != 0)
4836 goto out;
4837 if ((status = decode_putfh(&xdr)) != 0)
4838 goto out;
4839 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4840 goto out;
4841 /* Current FH is target directory */
4842 if (decode_getfattr(&xdr, res->new_fattr, res->server,
4843 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4844 goto out;
4845 if ((status = decode_restorefh(&xdr)) != 0)
4846 goto out;
4847 decode_getfattr(&xdr, res->old_fattr, res->server,
4848 !RPC_IS_ASYNC(rqstp->rq_task));
4849 out:
4850 return status;
4851 }
4852
4853 /*
4854 * Decode LINK response
4855 */
4856 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4857 {
4858 struct xdr_stream xdr;
4859 struct compound_hdr hdr;
4860 int status;
4861
4862 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4863 status = decode_compound_hdr(&xdr, &hdr);
4864 if (status)
4865 goto out;
4866 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4867 if (status)
4868 goto out;
4869 if ((status = decode_putfh(&xdr)) != 0)
4870 goto out;
4871 if ((status = decode_savefh(&xdr)) != 0)
4872 goto out;
4873 if ((status = decode_putfh(&xdr)) != 0)
4874 goto out;
4875 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4876 goto out;
4877 /*
4878 * Note order: OP_LINK leaves the directory as the current
4879 * filehandle.
4880 */
4881 if (decode_getfattr(&xdr, res->dir_attr, res->server,
4882 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4883 goto out;
4884 if ((status = decode_restorefh(&xdr)) != 0)
4885 goto out;
4886 decode_getfattr(&xdr, res->fattr, res->server,
4887 !RPC_IS_ASYNC(rqstp->rq_task));
4888 out:
4889 return status;
4890 }
4891
4892 /*
4893 * Decode CREATE response
4894 */
4895 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4896 {
4897 struct xdr_stream xdr;
4898 struct compound_hdr hdr;
4899 int status;
4900
4901 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4902 status = decode_compound_hdr(&xdr, &hdr);
4903 if (status)
4904 goto out;
4905 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4906 if (status)
4907 goto out;
4908 if ((status = decode_putfh(&xdr)) != 0)
4909 goto out;
4910 if ((status = decode_savefh(&xdr)) != 0)
4911 goto out;
4912 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4913 goto out;
4914 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4915 goto out;
4916 if (decode_getfattr(&xdr, res->fattr, res->server,
4917 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4918 goto out;
4919 if ((status = decode_restorefh(&xdr)) != 0)
4920 goto out;
4921 decode_getfattr(&xdr, res->dir_fattr, res->server,
4922 !RPC_IS_ASYNC(rqstp->rq_task));
4923 out:
4924 return status;
4925 }
4926
4927 /*
4928 * Decode SYMLINK response
4929 */
4930 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4931 {
4932 return nfs4_xdr_dec_create(rqstp, p, res);
4933 }
4934
4935 /*
4936 * Decode GETATTR response
4937 */
4938 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4939 {
4940 struct xdr_stream xdr;
4941 struct compound_hdr hdr;
4942 int status;
4943
4944 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4945 status = decode_compound_hdr(&xdr, &hdr);
4946 if (status)
4947 goto out;
4948 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4949 if (status)
4950 goto out;
4951 status = decode_putfh(&xdr);
4952 if (status)
4953 goto out;
4954 status = decode_getfattr(&xdr, res->fattr, res->server,
4955 !RPC_IS_ASYNC(rqstp->rq_task));
4956 out:
4957 return status;
4958 }
4959
4960 /*
4961 * Encode an SETACL request
4962 */
4963 static int
4964 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4965 {
4966 struct xdr_stream xdr;
4967 struct compound_hdr hdr = {
4968 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4969 };
4970 int status;
4971
4972 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4973 encode_compound_hdr(&xdr, req, &hdr);
4974 encode_sequence(&xdr, &args->seq_args, &hdr);
4975 encode_putfh(&xdr, args->fh, &hdr);
4976 status = encode_setacl(&xdr, args, &hdr);
4977 encode_nops(&hdr);
4978 return status;
4979 }
4980
4981 /*
4982 * Decode SETACL response
4983 */
4984 static int
4985 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4986 struct nfs_setaclres *res)
4987 {
4988 struct xdr_stream xdr;
4989 struct compound_hdr hdr;
4990 int status;
4991
4992 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4993 status = decode_compound_hdr(&xdr, &hdr);
4994 if (status)
4995 goto out;
4996 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4997 if (status)
4998 goto out;
4999 status = decode_putfh(&xdr);
5000 if (status)
5001 goto out;
5002 status = decode_setattr(&xdr);
5003 out:
5004 return status;
5005 }
5006
5007 /*
5008 * Decode GETACL response
5009 */
5010 static int
5011 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5012 struct nfs_getaclres *res)
5013 {
5014 struct xdr_stream xdr;
5015 struct compound_hdr hdr;
5016 int status;
5017
5018 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5019 status = decode_compound_hdr(&xdr, &hdr);
5020 if (status)
5021 goto out;
5022 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5023 if (status)
5024 goto out;
5025 status = decode_putfh(&xdr);
5026 if (status)
5027 goto out;
5028 status = decode_getacl(&xdr, rqstp, &res->acl_len);
5029
5030 out:
5031 return status;
5032 }
5033
5034 /*
5035 * Decode CLOSE response
5036 */
5037 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5038 {
5039 struct xdr_stream xdr;
5040 struct compound_hdr hdr;
5041 int status;
5042
5043 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5044 status = decode_compound_hdr(&xdr, &hdr);
5045 if (status)
5046 goto out;
5047 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5048 if (status)
5049 goto out;
5050 status = decode_putfh(&xdr);
5051 if (status)
5052 goto out;
5053 status = decode_close(&xdr, res);
5054 if (status != 0)
5055 goto out;
5056 /*
5057 * Note: Server may do delete on close for this file
5058 * in which case the getattr call will fail with
5059 * an ESTALE error. Shouldn't be a problem,
5060 * though, since fattr->valid will remain unset.
5061 */
5062 decode_getfattr(&xdr, res->fattr, res->server,
5063 !RPC_IS_ASYNC(rqstp->rq_task));
5064 out:
5065 return status;
5066 }
5067
5068 /*
5069 * Decode OPEN response
5070 */
5071 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5072 {
5073 struct xdr_stream xdr;
5074 struct compound_hdr hdr;
5075 int status;
5076
5077 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5078 status = decode_compound_hdr(&xdr, &hdr);
5079 if (status)
5080 goto out;
5081 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5082 if (status)
5083 goto out;
5084 status = decode_putfh(&xdr);
5085 if (status)
5086 goto out;
5087 status = decode_savefh(&xdr);
5088 if (status)
5089 goto out;
5090 status = decode_open(&xdr, res);
5091 if (status)
5092 goto out;
5093 if (decode_getfh(&xdr, &res->fh) != 0)
5094 goto out;
5095 if (decode_getfattr(&xdr, res->f_attr, res->server,
5096 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5097 goto out;
5098 if (decode_restorefh(&xdr) != 0)
5099 goto out;
5100 decode_getfattr(&xdr, res->dir_attr, res->server,
5101 !RPC_IS_ASYNC(rqstp->rq_task));
5102 out:
5103 return status;
5104 }
5105
5106 /*
5107 * Decode OPEN_CONFIRM response
5108 */
5109 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5110 {
5111 struct xdr_stream xdr;
5112 struct compound_hdr hdr;
5113 int status;
5114
5115 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5116 status = decode_compound_hdr(&xdr, &hdr);
5117 if (status)
5118 goto out;
5119 status = decode_putfh(&xdr);
5120 if (status)
5121 goto out;
5122 status = decode_open_confirm(&xdr, res);
5123 out:
5124 return status;
5125 }
5126
5127 /*
5128 * Decode OPEN response
5129 */
5130 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5131 {
5132 struct xdr_stream xdr;
5133 struct compound_hdr hdr;
5134 int status;
5135
5136 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5137 status = decode_compound_hdr(&xdr, &hdr);
5138 if (status)
5139 goto out;
5140 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5141 if (status)
5142 goto out;
5143 status = decode_putfh(&xdr);
5144 if (status)
5145 goto out;
5146 status = decode_open(&xdr, res);
5147 if (status)
5148 goto out;
5149 decode_getfattr(&xdr, res->f_attr, res->server,
5150 !RPC_IS_ASYNC(rqstp->rq_task));
5151 out:
5152 return status;
5153 }
5154
5155 /*
5156 * Decode SETATTR response
5157 */
5158 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5159 {
5160 struct xdr_stream xdr;
5161 struct compound_hdr hdr;
5162 int status;
5163
5164 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5165 status = decode_compound_hdr(&xdr, &hdr);
5166 if (status)
5167 goto out;
5168 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5169 if (status)
5170 goto out;
5171 status = decode_putfh(&xdr);
5172 if (status)
5173 goto out;
5174 status = decode_setattr(&xdr);
5175 if (status)
5176 goto out;
5177 decode_getfattr(&xdr, res->fattr, res->server,
5178 !RPC_IS_ASYNC(rqstp->rq_task));
5179 out:
5180 return status;
5181 }
5182
5183 /*
5184 * Decode LOCK response
5185 */
5186 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5187 {
5188 struct xdr_stream xdr;
5189 struct compound_hdr hdr;
5190 int status;
5191
5192 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5193 status = decode_compound_hdr(&xdr, &hdr);
5194 if (status)
5195 goto out;
5196 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5197 if (status)
5198 goto out;
5199 status = decode_putfh(&xdr);
5200 if (status)
5201 goto out;
5202 status = decode_lock(&xdr, res);
5203 out:
5204 return status;
5205 }
5206
5207 /*
5208 * Decode LOCKT response
5209 */
5210 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5211 {
5212 struct xdr_stream xdr;
5213 struct compound_hdr hdr;
5214 int status;
5215
5216 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5217 status = decode_compound_hdr(&xdr, &hdr);
5218 if (status)
5219 goto out;
5220 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5221 if (status)
5222 goto out;
5223 status = decode_putfh(&xdr);
5224 if (status)
5225 goto out;
5226 status = decode_lockt(&xdr, res);
5227 out:
5228 return status;
5229 }
5230
5231 /*
5232 * Decode LOCKU response
5233 */
5234 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5235 {
5236 struct xdr_stream xdr;
5237 struct compound_hdr hdr;
5238 int status;
5239
5240 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5241 status = decode_compound_hdr(&xdr, &hdr);
5242 if (status)
5243 goto out;
5244 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5245 if (status)
5246 goto out;
5247 status = decode_putfh(&xdr);
5248 if (status)
5249 goto out;
5250 status = decode_locku(&xdr, res);
5251 out:
5252 return status;
5253 }
5254
5255 /*
5256 * Decode READLINK response
5257 */
5258 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5259 struct nfs4_readlink_res *res)
5260 {
5261 struct xdr_stream xdr;
5262 struct compound_hdr hdr;
5263 int status;
5264
5265 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5266 status = decode_compound_hdr(&xdr, &hdr);
5267 if (status)
5268 goto out;
5269 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5270 if (status)
5271 goto out;
5272 status = decode_putfh(&xdr);
5273 if (status)
5274 goto out;
5275 status = decode_readlink(&xdr, rqstp);
5276 out:
5277 return status;
5278 }
5279
5280 /*
5281 * Decode READDIR response
5282 */
5283 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5284 {
5285 struct xdr_stream xdr;
5286 struct compound_hdr hdr;
5287 int status;
5288
5289 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5290 status = decode_compound_hdr(&xdr, &hdr);
5291 if (status)
5292 goto out;
5293 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5294 if (status)
5295 goto out;
5296 status = decode_putfh(&xdr);
5297 if (status)
5298 goto out;
5299 status = decode_readdir(&xdr, rqstp, res);
5300 out:
5301 return status;
5302 }
5303
5304 /*
5305 * Decode Read response
5306 */
5307 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5308 {
5309 struct xdr_stream xdr;
5310 struct compound_hdr hdr;
5311 int status;
5312
5313 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5314 status = decode_compound_hdr(&xdr, &hdr);
5315 if (status)
5316 goto out;
5317 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5318 if (status)
5319 goto out;
5320 status = decode_putfh(&xdr);
5321 if (status)
5322 goto out;
5323 status = decode_read(&xdr, rqstp, res);
5324 if (!status)
5325 status = res->count;
5326 out:
5327 return status;
5328 }
5329
5330 /*
5331 * Decode WRITE response
5332 */
5333 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5334 {
5335 struct xdr_stream xdr;
5336 struct compound_hdr hdr;
5337 int status;
5338
5339 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5340 status = decode_compound_hdr(&xdr, &hdr);
5341 if (status)
5342 goto out;
5343 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5344 if (status)
5345 goto out;
5346 status = decode_putfh(&xdr);
5347 if (status)
5348 goto out;
5349 status = decode_write(&xdr, res);
5350 if (status)
5351 goto out;
5352 decode_getfattr(&xdr, res->fattr, res->server,
5353 !RPC_IS_ASYNC(rqstp->rq_task));
5354 if (!status)
5355 status = res->count;
5356 out:
5357 return status;
5358 }
5359
5360 /*
5361 * Decode COMMIT response
5362 */
5363 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5364 {
5365 struct xdr_stream xdr;
5366 struct compound_hdr hdr;
5367 int status;
5368
5369 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5370 status = decode_compound_hdr(&xdr, &hdr);
5371 if (status)
5372 goto out;
5373 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5374 if (status)
5375 goto out;
5376 status = decode_putfh(&xdr);
5377 if (status)
5378 goto out;
5379 status = decode_commit(&xdr, res);
5380 if (status)
5381 goto out;
5382 decode_getfattr(&xdr, res->fattr, res->server,
5383 !RPC_IS_ASYNC(rqstp->rq_task));
5384 out:
5385 return status;
5386 }
5387
5388 /*
5389 * Decode FSINFO response
5390 */
5391 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5392 struct nfs4_fsinfo_res *res)
5393 {
5394 struct xdr_stream xdr;
5395 struct compound_hdr hdr;
5396 int status;
5397
5398 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5399 status = decode_compound_hdr(&xdr, &hdr);
5400 if (!status)
5401 status = decode_sequence(&xdr, &res->seq_res, req);
5402 if (!status)
5403 status = decode_putfh(&xdr);
5404 if (!status)
5405 status = decode_fsinfo(&xdr, res->fsinfo);
5406 return status;
5407 }
5408
5409 /*
5410 * Decode PATHCONF response
5411 */
5412 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5413 struct nfs4_pathconf_res *res)
5414 {
5415 struct xdr_stream xdr;
5416 struct compound_hdr hdr;
5417 int status;
5418
5419 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5420 status = decode_compound_hdr(&xdr, &hdr);
5421 if (!status)
5422 status = decode_sequence(&xdr, &res->seq_res, req);
5423 if (!status)
5424 status = decode_putfh(&xdr);
5425 if (!status)
5426 status = decode_pathconf(&xdr, res->pathconf);
5427 return status;
5428 }
5429
5430 /*
5431 * Decode STATFS response
5432 */
5433 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5434 struct nfs4_statfs_res *res)
5435 {
5436 struct xdr_stream xdr;
5437 struct compound_hdr hdr;
5438 int status;
5439
5440 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5441 status = decode_compound_hdr(&xdr, &hdr);
5442 if (!status)
5443 status = decode_sequence(&xdr, &res->seq_res, req);
5444 if (!status)
5445 status = decode_putfh(&xdr);
5446 if (!status)
5447 status = decode_statfs(&xdr, res->fsstat);
5448 return status;
5449 }
5450
5451 /*
5452 * Decode GETATTR_BITMAP response
5453 */
5454 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5455 {
5456 struct xdr_stream xdr;
5457 struct compound_hdr hdr;
5458 int status;
5459
5460 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5461 status = decode_compound_hdr(&xdr, &hdr);
5462 if (status)
5463 goto out;
5464 status = decode_sequence(&xdr, &res->seq_res, req);
5465 if (status)
5466 goto out;
5467 if ((status = decode_putfh(&xdr)) != 0)
5468 goto out;
5469 status = decode_server_caps(&xdr, res);
5470 out:
5471 return status;
5472 }
5473
5474 /*
5475 * Decode RENEW response
5476 */
5477 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5478 {
5479 struct xdr_stream xdr;
5480 struct compound_hdr hdr;
5481 int status;
5482
5483 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5484 status = decode_compound_hdr(&xdr, &hdr);
5485 if (!status)
5486 status = decode_renew(&xdr);
5487 return status;
5488 }
5489
5490 /*
5491 * Decode SETCLIENTID response
5492 */
5493 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5494 struct nfs_client *clp)
5495 {
5496 struct xdr_stream xdr;
5497 struct compound_hdr hdr;
5498 int status;
5499
5500 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5501 status = decode_compound_hdr(&xdr, &hdr);
5502 if (!status)
5503 status = decode_setclientid(&xdr, clp);
5504 return status;
5505 }
5506
5507 /*
5508 * Decode SETCLIENTID_CONFIRM response
5509 */
5510 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5511 {
5512 struct xdr_stream xdr;
5513 struct compound_hdr hdr;
5514 int status;
5515
5516 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5517 status = decode_compound_hdr(&xdr, &hdr);
5518 if (!status)
5519 status = decode_setclientid_confirm(&xdr);
5520 if (!status)
5521 status = decode_putrootfh(&xdr);
5522 if (!status)
5523 status = decode_fsinfo(&xdr, fsinfo);
5524 return status;
5525 }
5526
5527 /*
5528 * Decode DELEGRETURN response
5529 */
5530 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5531 {
5532 struct xdr_stream xdr;
5533 struct compound_hdr hdr;
5534 int status;
5535
5536 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5537 status = decode_compound_hdr(&xdr, &hdr);
5538 if (status)
5539 goto out;
5540 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5541 if (status)
5542 goto out;
5543 status = decode_putfh(&xdr);
5544 if (status != 0)
5545 goto out;
5546 status = decode_delegreturn(&xdr);
5547 decode_getfattr(&xdr, res->fattr, res->server,
5548 !RPC_IS_ASYNC(rqstp->rq_task));
5549 out:
5550 return status;
5551 }
5552
5553 /*
5554 * Decode FS_LOCATIONS response
5555 */
5556 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5557 struct nfs4_fs_locations_res *res)
5558 {
5559 struct xdr_stream xdr;
5560 struct compound_hdr hdr;
5561 int status;
5562
5563 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5564 status = decode_compound_hdr(&xdr, &hdr);
5565 if (status)
5566 goto out;
5567 status = decode_sequence(&xdr, &res->seq_res, req);
5568 if (status)
5569 goto out;
5570 if ((status = decode_putfh(&xdr)) != 0)
5571 goto out;
5572 if ((status = decode_lookup(&xdr)) != 0)
5573 goto out;
5574 xdr_enter_page(&xdr, PAGE_SIZE);
5575 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5576 res->fs_locations->server,
5577 !RPC_IS_ASYNC(req->rq_task));
5578 out:
5579 return status;
5580 }
5581
5582 #if defined(CONFIG_NFS_V4_1)
5583 /*
5584 * Decode EXCHANGE_ID response
5585 */
5586 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5587 void *res)
5588 {
5589 struct xdr_stream xdr;
5590 struct compound_hdr hdr;
5591 int status;
5592
5593 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5594 status = decode_compound_hdr(&xdr, &hdr);
5595 if (!status)
5596 status = decode_exchange_id(&xdr, res);
5597 return status;
5598 }
5599
5600 /*
5601 * Decode CREATE_SESSION response
5602 */
5603 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5604 struct nfs41_create_session_res *res)
5605 {
5606 struct xdr_stream xdr;
5607 struct compound_hdr hdr;
5608 int status;
5609
5610 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5611 status = decode_compound_hdr(&xdr, &hdr);
5612 if (!status)
5613 status = decode_create_session(&xdr, res);
5614 return status;
5615 }
5616
5617 /*
5618 * Decode DESTROY_SESSION response
5619 */
5620 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5621 void *dummy)
5622 {
5623 struct xdr_stream xdr;
5624 struct compound_hdr hdr;
5625 int status;
5626
5627 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5628 status = decode_compound_hdr(&xdr, &hdr);
5629 if (!status)
5630 status = decode_destroy_session(&xdr, dummy);
5631 return status;
5632 }
5633
5634 /*
5635 * Decode SEQUENCE response
5636 */
5637 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5638 struct nfs4_sequence_res *res)
5639 {
5640 struct xdr_stream xdr;
5641 struct compound_hdr hdr;
5642 int status;
5643
5644 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5645 status = decode_compound_hdr(&xdr, &hdr);
5646 if (!status)
5647 status = decode_sequence(&xdr, res, rqstp);
5648 return status;
5649 }
5650
5651 /*
5652 * Decode GET_LEASE_TIME response
5653 */
5654 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5655 struct nfs4_get_lease_time_res *res)
5656 {
5657 struct xdr_stream xdr;
5658 struct compound_hdr hdr;
5659 int status;
5660
5661 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5662 status = decode_compound_hdr(&xdr, &hdr);
5663 if (!status)
5664 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5665 if (!status)
5666 status = decode_putrootfh(&xdr);
5667 if (!status)
5668 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5669 return status;
5670 }
5671
5672 /*
5673 * Decode RECLAIM_COMPLETE response
5674 */
5675 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5676 struct nfs41_reclaim_complete_res *res)
5677 {
5678 struct xdr_stream xdr;
5679 struct compound_hdr hdr;
5680 int status;
5681
5682 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5683 status = decode_compound_hdr(&xdr, &hdr);
5684 if (!status)
5685 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5686 if (!status)
5687 status = decode_reclaim_complete(&xdr, (void *)NULL);
5688 return status;
5689 }
5690 #endif /* CONFIG_NFS_V4_1 */
5691
5692 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5693 {
5694 uint32_t bitmap[2] = {0};
5695 uint32_t len;
5696
5697 if (!*p++) {
5698 if (!*p)
5699 return ERR_PTR(-EAGAIN);
5700 entry->eof = 1;
5701 return ERR_PTR(-EBADCOOKIE);
5702 }
5703
5704 entry->prev_cookie = entry->cookie;
5705 p = xdr_decode_hyper(p, &entry->cookie);
5706 entry->len = ntohl(*p++);
5707 entry->name = (const char *) p;
5708 p += XDR_QUADLEN(entry->len);
5709
5710 /*
5711 * In case the server doesn't return an inode number,
5712 * we fake one here. (We don't use inode number 0,
5713 * since glibc seems to choke on it...)
5714 */
5715 entry->ino = 1;
5716
5717 len = ntohl(*p++); /* bitmap length */
5718 if (len-- > 0) {
5719 bitmap[0] = ntohl(*p++);
5720 if (len-- > 0) {
5721 bitmap[1] = ntohl(*p++);
5722 p += len;
5723 }
5724 }
5725 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5726 if (len > 0) {
5727 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5728 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5729 /* Ignore the return value of rdattr_error for now */
5730 p++;
5731 len--;
5732 }
5733 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5734 xdr_decode_hyper(p, &entry->ino);
5735 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5736 xdr_decode_hyper(p, &entry->ino);
5737 p += len;
5738 }
5739
5740 entry->eof = !p[0] && p[1];
5741 return p;
5742 }
5743
5744 /*
5745 * We need to translate between nfs status return values and
5746 * the local errno values which may not be the same.
5747 */
5748 static struct {
5749 int stat;
5750 int errno;
5751 } nfs_errtbl[] = {
5752 { NFS4_OK, 0 },
5753 { NFS4ERR_PERM, -EPERM },
5754 { NFS4ERR_NOENT, -ENOENT },
5755 { NFS4ERR_IO, -errno_NFSERR_IO},
5756 { NFS4ERR_NXIO, -ENXIO },
5757 { NFS4ERR_ACCESS, -EACCES },
5758 { NFS4ERR_EXIST, -EEXIST },
5759 { NFS4ERR_XDEV, -EXDEV },
5760 { NFS4ERR_NOTDIR, -ENOTDIR },
5761 { NFS4ERR_ISDIR, -EISDIR },
5762 { NFS4ERR_INVAL, -EINVAL },
5763 { NFS4ERR_FBIG, -EFBIG },
5764 { NFS4ERR_NOSPC, -ENOSPC },
5765 { NFS4ERR_ROFS, -EROFS },
5766 { NFS4ERR_MLINK, -EMLINK },
5767 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
5768 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
5769 { NFS4ERR_DQUOT, -EDQUOT },
5770 { NFS4ERR_STALE, -ESTALE },
5771 { NFS4ERR_BADHANDLE, -EBADHANDLE },
5772 { NFS4ERR_BADOWNER, -EINVAL },
5773 { NFS4ERR_BADNAME, -EINVAL },
5774 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
5775 { NFS4ERR_NOTSUPP, -ENOTSUPP },
5776 { NFS4ERR_TOOSMALL, -ETOOSMALL },
5777 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
5778 { NFS4ERR_BADTYPE, -EBADTYPE },
5779 { NFS4ERR_LOCKED, -EAGAIN },
5780 { NFS4ERR_SYMLINK, -ELOOP },
5781 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5782 { NFS4ERR_DEADLOCK, -EDEADLK },
5783 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5784 * to be handled by a
5785 * middle-layer.
5786 */
5787 { -1, -EIO }
5788 };
5789
5790 /*
5791 * Convert an NFS error code to a local one.
5792 * This one is used jointly by NFSv2 and NFSv3.
5793 */
5794 static int
5795 nfs4_stat_to_errno(int stat)
5796 {
5797 int i;
5798 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5799 if (nfs_errtbl[i].stat == stat)
5800 return nfs_errtbl[i].errno;
5801 }
5802 if (stat <= 10000 || stat > 10100) {
5803 /* The server is looney tunes. */
5804 return -EREMOTEIO;
5805 }
5806 /* If we cannot translate the error, the recovery routines should
5807 * handle it.
5808 * Note: remaining NFSv4 error codes have values > 10000, so should
5809 * not conflict with native Linux error codes.
5810 */
5811 return -stat;
5812 }
5813
5814 #define PROC(proc, argtype, restype) \
5815 [NFSPROC4_CLNT_##proc] = { \
5816 .p_proc = NFSPROC4_COMPOUND, \
5817 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5818 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5819 .p_arglen = NFS4_##argtype##_sz, \
5820 .p_replen = NFS4_##restype##_sz, \
5821 .p_statidx = NFSPROC4_CLNT_##proc, \
5822 .p_name = #proc, \
5823 }
5824
5825 struct rpc_procinfo nfs4_procedures[] = {
5826 PROC(READ, enc_read, dec_read),
5827 PROC(WRITE, enc_write, dec_write),
5828 PROC(COMMIT, enc_commit, dec_commit),
5829 PROC(OPEN, enc_open, dec_open),
5830 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5831 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5832 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5833 PROC(CLOSE, enc_close, dec_close),
5834 PROC(SETATTR, enc_setattr, dec_setattr),
5835 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5836 PROC(RENEW, enc_renew, dec_renew),
5837 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5838 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5839 PROC(LOCK, enc_lock, dec_lock),
5840 PROC(LOCKT, enc_lockt, dec_lockt),
5841 PROC(LOCKU, enc_locku, dec_locku),
5842 PROC(ACCESS, enc_access, dec_access),
5843 PROC(GETATTR, enc_getattr, dec_getattr),
5844 PROC(LOOKUP, enc_lookup, dec_lookup),
5845 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5846 PROC(REMOVE, enc_remove, dec_remove),
5847 PROC(RENAME, enc_rename, dec_rename),
5848 PROC(LINK, enc_link, dec_link),
5849 PROC(SYMLINK, enc_symlink, dec_symlink),
5850 PROC(CREATE, enc_create, dec_create),
5851 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5852 PROC(STATFS, enc_statfs, dec_statfs),
5853 PROC(READLINK, enc_readlink, dec_readlink),
5854 PROC(READDIR, enc_readdir, dec_readdir),
5855 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5856 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5857 PROC(GETACL, enc_getacl, dec_getacl),
5858 PROC(SETACL, enc_setacl, dec_setacl),
5859 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5860 #if defined(CONFIG_NFS_V4_1)
5861 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5862 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
5863 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
5864 PROC(SEQUENCE, enc_sequence, dec_sequence),
5865 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
5866 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
5867 #endif /* CONFIG_NFS_V4_1 */
5868 };
5869
5870 struct rpc_version nfs_version4 = {
5871 .number = 4,
5872 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5873 .procs = nfs4_procedures
5874 };
5875
5876 /*
5877 * Local variables:
5878 * c-basic-offset: 8
5879 * End:
5880 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree