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eCryptfs: Copy lower directory inode times and size on link
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfs / nfs4xdr.c
blob4d338be492cb28f6e91ae9eecfe30af64555154d
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_mtime.tv_sec);
867 *p++ = cpu_to_be32(iap->ia_mtime.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 u32 max_resp_sz_cached;
1582
1583 /*
1584 * Assumes OPEN is the biggest non-idempotent compound.
1585 * 2 is the verifier.
1586 */
1587 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1588 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1589
1590 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1591 clp->cl_ipaddr);
1592
1593 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1594 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1595 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1596 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1597 *p++ = cpu_to_be32(args->flags); /*flags */
1598
1599 /* Fore Channel */
1600 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1601 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1602 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1603 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1604 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1605 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1606 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1607
1608 /* Back Channel */
1609 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1610 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1611 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1612 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1613 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1614 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1615 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1616
1617 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1618 *p++ = cpu_to_be32(1);
1619 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1620
1621 /* authsys_parms rfc1831 */
1622 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1623 p = xdr_encode_opaque(p, machine_name, len);
1624 *p++ = cpu_to_be32(0); /* UID */
1625 *p++ = cpu_to_be32(0); /* GID */
1626 *p = cpu_to_be32(0); /* No more gids */
1627 hdr->nops++;
1628 hdr->replen += decode_create_session_maxsz;
1629 }
1630
1631 static void encode_destroy_session(struct xdr_stream *xdr,
1632 struct nfs4_session *session,
1633 struct compound_hdr *hdr)
1634 {
1635 __be32 *p;
1636 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1637 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1638 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1639 hdr->nops++;
1640 hdr->replen += decode_destroy_session_maxsz;
1641 }
1642
1643 static void encode_reclaim_complete(struct xdr_stream *xdr,
1644 struct nfs41_reclaim_complete_args *args,
1645 struct compound_hdr *hdr)
1646 {
1647 __be32 *p;
1648
1649 p = reserve_space(xdr, 8);
1650 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1651 *p++ = cpu_to_be32(args->one_fs);
1652 hdr->nops++;
1653 hdr->replen += decode_reclaim_complete_maxsz;
1654 }
1655 #endif /* CONFIG_NFS_V4_1 */
1656
1657 static void encode_sequence(struct xdr_stream *xdr,
1658 const struct nfs4_sequence_args *args,
1659 struct compound_hdr *hdr)
1660 {
1661 #if defined(CONFIG_NFS_V4_1)
1662 struct nfs4_session *session = args->sa_session;
1663 struct nfs4_slot_table *tp;
1664 struct nfs4_slot *slot;
1665 __be32 *p;
1666
1667 if (!session)
1668 return;
1669
1670 tp = &session->fc_slot_table;
1671
1672 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1673 slot = tp->slots + args->sa_slotid;
1674
1675 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1676 *p++ = cpu_to_be32(OP_SEQUENCE);
1677
1678 /*
1679 * Sessionid + seqid + slotid + max slotid + cache_this
1680 */
1681 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1682 "max_slotid=%d cache_this=%d\n",
1683 __func__,
1684 ((u32 *)session->sess_id.data)[0],
1685 ((u32 *)session->sess_id.data)[1],
1686 ((u32 *)session->sess_id.data)[2],
1687 ((u32 *)session->sess_id.data)[3],
1688 slot->seq_nr, args->sa_slotid,
1689 tp->highest_used_slotid, args->sa_cache_this);
1690 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1691 *p++ = cpu_to_be32(slot->seq_nr);
1692 *p++ = cpu_to_be32(args->sa_slotid);
1693 *p++ = cpu_to_be32(tp->highest_used_slotid);
1694 *p = cpu_to_be32(args->sa_cache_this);
1695 hdr->nops++;
1696 hdr->replen += decode_sequence_maxsz;
1697 #endif /* CONFIG_NFS_V4_1 */
1698 }
1699
1700 /*
1701 * END OF "GENERIC" ENCODE ROUTINES.
1702 */
1703
1704 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1705 {
1706 #if defined(CONFIG_NFS_V4_1)
1707 if (args->sa_session)
1708 return args->sa_session->clp->cl_minorversion;
1709 #endif /* CONFIG_NFS_V4_1 */
1710 return 0;
1711 }
1712
1713 /*
1714 * Encode an ACCESS request
1715 */
1716 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1717 {
1718 struct xdr_stream xdr;
1719 struct compound_hdr hdr = {
1720 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1721 };
1722
1723 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1724 encode_compound_hdr(&xdr, req, &hdr);
1725 encode_sequence(&xdr, &args->seq_args, &hdr);
1726 encode_putfh(&xdr, args->fh, &hdr);
1727 encode_access(&xdr, args->access, &hdr);
1728 encode_getfattr(&xdr, args->bitmask, &hdr);
1729 encode_nops(&hdr);
1730 return 0;
1731 }
1732
1733 /*
1734 * Encode LOOKUP request
1735 */
1736 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1737 {
1738 struct xdr_stream xdr;
1739 struct compound_hdr hdr = {
1740 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1741 };
1742
1743 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744 encode_compound_hdr(&xdr, req, &hdr);
1745 encode_sequence(&xdr, &args->seq_args, &hdr);
1746 encode_putfh(&xdr, args->dir_fh, &hdr);
1747 encode_lookup(&xdr, args->name, &hdr);
1748 encode_getfh(&xdr, &hdr);
1749 encode_getfattr(&xdr, args->bitmask, &hdr);
1750 encode_nops(&hdr);
1751 return 0;
1752 }
1753
1754 /*
1755 * Encode LOOKUP_ROOT request
1756 */
1757 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1758 {
1759 struct xdr_stream xdr;
1760 struct compound_hdr hdr = {
1761 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1762 };
1763
1764 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1765 encode_compound_hdr(&xdr, req, &hdr);
1766 encode_sequence(&xdr, &args->seq_args, &hdr);
1767 encode_putrootfh(&xdr, &hdr);
1768 encode_getfh(&xdr, &hdr);
1769 encode_getfattr(&xdr, args->bitmask, &hdr);
1770 encode_nops(&hdr);
1771 return 0;
1772 }
1773
1774 /*
1775 * Encode REMOVE request
1776 */
1777 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1778 {
1779 struct xdr_stream xdr;
1780 struct compound_hdr hdr = {
1781 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1782 };
1783
1784 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1785 encode_compound_hdr(&xdr, req, &hdr);
1786 encode_sequence(&xdr, &args->seq_args, &hdr);
1787 encode_putfh(&xdr, args->fh, &hdr);
1788 encode_remove(&xdr, &args->name, &hdr);
1789 encode_getfattr(&xdr, args->bitmask, &hdr);
1790 encode_nops(&hdr);
1791 return 0;
1792 }
1793
1794 /*
1795 * Encode RENAME request
1796 */
1797 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1798 {
1799 struct xdr_stream xdr;
1800 struct compound_hdr hdr = {
1801 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1802 };
1803
1804 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805 encode_compound_hdr(&xdr, req, &hdr);
1806 encode_sequence(&xdr, &args->seq_args, &hdr);
1807 encode_putfh(&xdr, args->old_dir, &hdr);
1808 encode_savefh(&xdr, &hdr);
1809 encode_putfh(&xdr, args->new_dir, &hdr);
1810 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1811 encode_getfattr(&xdr, args->bitmask, &hdr);
1812 encode_restorefh(&xdr, &hdr);
1813 encode_getfattr(&xdr, args->bitmask, &hdr);
1814 encode_nops(&hdr);
1815 return 0;
1816 }
1817
1818 /*
1819 * Encode LINK request
1820 */
1821 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1822 {
1823 struct xdr_stream xdr;
1824 struct compound_hdr hdr = {
1825 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1826 };
1827
1828 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1829 encode_compound_hdr(&xdr, req, &hdr);
1830 encode_sequence(&xdr, &args->seq_args, &hdr);
1831 encode_putfh(&xdr, args->fh, &hdr);
1832 encode_savefh(&xdr, &hdr);
1833 encode_putfh(&xdr, args->dir_fh, &hdr);
1834 encode_link(&xdr, args->name, &hdr);
1835 encode_getfattr(&xdr, args->bitmask, &hdr);
1836 encode_restorefh(&xdr, &hdr);
1837 encode_getfattr(&xdr, args->bitmask, &hdr);
1838 encode_nops(&hdr);
1839 return 0;
1840 }
1841
1842 /*
1843 * Encode CREATE request
1844 */
1845 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1846 {
1847 struct xdr_stream xdr;
1848 struct compound_hdr hdr = {
1849 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1850 };
1851
1852 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1853 encode_compound_hdr(&xdr, req, &hdr);
1854 encode_sequence(&xdr, &args->seq_args, &hdr);
1855 encode_putfh(&xdr, args->dir_fh, &hdr);
1856 encode_savefh(&xdr, &hdr);
1857 encode_create(&xdr, args, &hdr);
1858 encode_getfh(&xdr, &hdr);
1859 encode_getfattr(&xdr, args->bitmask, &hdr);
1860 encode_restorefh(&xdr, &hdr);
1861 encode_getfattr(&xdr, args->bitmask, &hdr);
1862 encode_nops(&hdr);
1863 return 0;
1864 }
1865
1866 /*
1867 * Encode SYMLINK request
1868 */
1869 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1870 {
1871 return nfs4_xdr_enc_create(req, p, args);
1872 }
1873
1874 /*
1875 * Encode GETATTR request
1876 */
1877 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1878 {
1879 struct xdr_stream xdr;
1880 struct compound_hdr hdr = {
1881 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1882 };
1883
1884 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1885 encode_compound_hdr(&xdr, req, &hdr);
1886 encode_sequence(&xdr, &args->seq_args, &hdr);
1887 encode_putfh(&xdr, args->fh, &hdr);
1888 encode_getfattr(&xdr, args->bitmask, &hdr);
1889 encode_nops(&hdr);
1890 return 0;
1891 }
1892
1893 /*
1894 * Encode a CLOSE request
1895 */
1896 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1897 {
1898 struct xdr_stream xdr;
1899 struct compound_hdr hdr = {
1900 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1901 };
1902
1903 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1904 encode_compound_hdr(&xdr, req, &hdr);
1905 encode_sequence(&xdr, &args->seq_args, &hdr);
1906 encode_putfh(&xdr, args->fh, &hdr);
1907 encode_close(&xdr, args, &hdr);
1908 encode_getfattr(&xdr, args->bitmask, &hdr);
1909 encode_nops(&hdr);
1910 return 0;
1911 }
1912
1913 /*
1914 * Encode an OPEN request
1915 */
1916 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1917 {
1918 struct xdr_stream xdr;
1919 struct compound_hdr hdr = {
1920 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1921 };
1922
1923 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1924 encode_compound_hdr(&xdr, req, &hdr);
1925 encode_sequence(&xdr, &args->seq_args, &hdr);
1926 encode_putfh(&xdr, args->fh, &hdr);
1927 encode_savefh(&xdr, &hdr);
1928 encode_open(&xdr, args, &hdr);
1929 encode_getfh(&xdr, &hdr);
1930 encode_getfattr(&xdr, args->bitmask, &hdr);
1931 encode_restorefh(&xdr, &hdr);
1932 encode_getfattr(&xdr, args->bitmask, &hdr);
1933 encode_nops(&hdr);
1934 return 0;
1935 }
1936
1937 /*
1938 * Encode an OPEN_CONFIRM request
1939 */
1940 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1941 {
1942 struct xdr_stream xdr;
1943 struct compound_hdr hdr = {
1944 .nops = 0,
1945 };
1946
1947 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1948 encode_compound_hdr(&xdr, req, &hdr);
1949 encode_putfh(&xdr, args->fh, &hdr);
1950 encode_open_confirm(&xdr, args, &hdr);
1951 encode_nops(&hdr);
1952 return 0;
1953 }
1954
1955 /*
1956 * Encode an OPEN request with no attributes.
1957 */
1958 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1959 {
1960 struct xdr_stream xdr;
1961 struct compound_hdr hdr = {
1962 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1963 };
1964
1965 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966 encode_compound_hdr(&xdr, req, &hdr);
1967 encode_sequence(&xdr, &args->seq_args, &hdr);
1968 encode_putfh(&xdr, args->fh, &hdr);
1969 encode_open(&xdr, args, &hdr);
1970 encode_getfattr(&xdr, args->bitmask, &hdr);
1971 encode_nops(&hdr);
1972 return 0;
1973 }
1974
1975 /*
1976 * Encode an OPEN_DOWNGRADE request
1977 */
1978 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1979 {
1980 struct xdr_stream xdr;
1981 struct compound_hdr hdr = {
1982 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1983 };
1984
1985 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1986 encode_compound_hdr(&xdr, req, &hdr);
1987 encode_sequence(&xdr, &args->seq_args, &hdr);
1988 encode_putfh(&xdr, args->fh, &hdr);
1989 encode_open_downgrade(&xdr, args, &hdr);
1990 encode_getfattr(&xdr, args->bitmask, &hdr);
1991 encode_nops(&hdr);
1992 return 0;
1993 }
1994
1995 /*
1996 * Encode a LOCK request
1997 */
1998 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1999 {
2000 struct xdr_stream xdr;
2001 struct compound_hdr hdr = {
2002 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2003 };
2004
2005 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2006 encode_compound_hdr(&xdr, req, &hdr);
2007 encode_sequence(&xdr, &args->seq_args, &hdr);
2008 encode_putfh(&xdr, args->fh, &hdr);
2009 encode_lock(&xdr, args, &hdr);
2010 encode_nops(&hdr);
2011 return 0;
2012 }
2013
2014 /*
2015 * Encode a LOCKT request
2016 */
2017 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2018 {
2019 struct xdr_stream xdr;
2020 struct compound_hdr hdr = {
2021 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022 };
2023
2024 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2025 encode_compound_hdr(&xdr, req, &hdr);
2026 encode_sequence(&xdr, &args->seq_args, &hdr);
2027 encode_putfh(&xdr, args->fh, &hdr);
2028 encode_lockt(&xdr, args, &hdr);
2029 encode_nops(&hdr);
2030 return 0;
2031 }
2032
2033 /*
2034 * Encode a LOCKU request
2035 */
2036 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2037 {
2038 struct xdr_stream xdr;
2039 struct compound_hdr hdr = {
2040 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2041 };
2042
2043 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2044 encode_compound_hdr(&xdr, req, &hdr);
2045 encode_sequence(&xdr, &args->seq_args, &hdr);
2046 encode_putfh(&xdr, args->fh, &hdr);
2047 encode_locku(&xdr, args, &hdr);
2048 encode_nops(&hdr);
2049 return 0;
2050 }
2051
2052 /*
2053 * Encode a READLINK request
2054 */
2055 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2056 {
2057 struct xdr_stream xdr;
2058 struct compound_hdr hdr = {
2059 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2060 };
2061
2062 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2063 encode_compound_hdr(&xdr, req, &hdr);
2064 encode_sequence(&xdr, &args->seq_args, &hdr);
2065 encode_putfh(&xdr, args->fh, &hdr);
2066 encode_readlink(&xdr, args, req, &hdr);
2067
2068 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2069 args->pgbase, args->pglen);
2070 encode_nops(&hdr);
2071 return 0;
2072 }
2073
2074 /*
2075 * Encode a READDIR request
2076 */
2077 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2078 {
2079 struct xdr_stream xdr;
2080 struct compound_hdr hdr = {
2081 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082 };
2083
2084 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2085 encode_compound_hdr(&xdr, req, &hdr);
2086 encode_sequence(&xdr, &args->seq_args, &hdr);
2087 encode_putfh(&xdr, args->fh, &hdr);
2088 encode_readdir(&xdr, args, req, &hdr);
2089
2090 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2091 args->pgbase, args->count);
2092 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2093 __func__, hdr.replen << 2, args->pages,
2094 args->pgbase, args->count);
2095 encode_nops(&hdr);
2096 return 0;
2097 }
2098
2099 /*
2100 * Encode a READ request
2101 */
2102 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2103 {
2104 struct xdr_stream xdr;
2105 struct compound_hdr hdr = {
2106 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107 };
2108
2109 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2110 encode_compound_hdr(&xdr, req, &hdr);
2111 encode_sequence(&xdr, &args->seq_args, &hdr);
2112 encode_putfh(&xdr, args->fh, &hdr);
2113 encode_read(&xdr, args, &hdr);
2114
2115 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2116 args->pages, args->pgbase, args->count);
2117 req->rq_rcv_buf.flags |= XDRBUF_READ;
2118 encode_nops(&hdr);
2119 return 0;
2120 }
2121
2122 /*
2123 * Encode an SETATTR request
2124 */
2125 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2126 {
2127 struct xdr_stream xdr;
2128 struct compound_hdr hdr = {
2129 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2130 };
2131
2132 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2133 encode_compound_hdr(&xdr, req, &hdr);
2134 encode_sequence(&xdr, &args->seq_args, &hdr);
2135 encode_putfh(&xdr, args->fh, &hdr);
2136 encode_setattr(&xdr, args, args->server, &hdr);
2137 encode_getfattr(&xdr, args->bitmask, &hdr);
2138 encode_nops(&hdr);
2139 return 0;
2140 }
2141
2142 /*
2143 * Encode a GETACL request
2144 */
2145 static int
2146 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2147 struct nfs_getaclargs *args)
2148 {
2149 struct xdr_stream xdr;
2150 struct compound_hdr hdr = {
2151 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2152 };
2153 uint32_t replen;
2154
2155 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2156 encode_compound_hdr(&xdr, req, &hdr);
2157 encode_sequence(&xdr, &args->seq_args, &hdr);
2158 encode_putfh(&xdr, args->fh, &hdr);
2159 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2160 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2161
2162 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2163 args->acl_pages, args->acl_pgbase, args->acl_len);
2164 encode_nops(&hdr);
2165 return 0;
2166 }
2167
2168 /*
2169 * Encode a WRITE request
2170 */
2171 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2172 {
2173 struct xdr_stream xdr;
2174 struct compound_hdr hdr = {
2175 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176 };
2177
2178 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2179 encode_compound_hdr(&xdr, req, &hdr);
2180 encode_sequence(&xdr, &args->seq_args, &hdr);
2181 encode_putfh(&xdr, args->fh, &hdr);
2182 encode_write(&xdr, args, &hdr);
2183 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2184 encode_getfattr(&xdr, args->bitmask, &hdr);
2185 encode_nops(&hdr);
2186 return 0;
2187 }
2188
2189 /*
2190 * a COMMIT request
2191 */
2192 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2193 {
2194 struct xdr_stream xdr;
2195 struct compound_hdr hdr = {
2196 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197 };
2198
2199 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2200 encode_compound_hdr(&xdr, req, &hdr);
2201 encode_sequence(&xdr, &args->seq_args, &hdr);
2202 encode_putfh(&xdr, args->fh, &hdr);
2203 encode_commit(&xdr, args, &hdr);
2204 encode_getfattr(&xdr, args->bitmask, &hdr);
2205 encode_nops(&hdr);
2206 return 0;
2207 }
2208
2209 /*
2210 * FSINFO request
2211 */
2212 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2213 {
2214 struct xdr_stream xdr;
2215 struct compound_hdr hdr = {
2216 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217 };
2218
2219 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2220 encode_compound_hdr(&xdr, req, &hdr);
2221 encode_sequence(&xdr, &args->seq_args, &hdr);
2222 encode_putfh(&xdr, args->fh, &hdr);
2223 encode_fsinfo(&xdr, args->bitmask, &hdr);
2224 encode_nops(&hdr);
2225 return 0;
2226 }
2227
2228 /*
2229 * a PATHCONF request
2230 */
2231 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2232 {
2233 struct xdr_stream xdr;
2234 struct compound_hdr hdr = {
2235 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2236 };
2237
2238 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2239 encode_compound_hdr(&xdr, req, &hdr);
2240 encode_sequence(&xdr, &args->seq_args, &hdr);
2241 encode_putfh(&xdr, args->fh, &hdr);
2242 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2243 &hdr);
2244 encode_nops(&hdr);
2245 return 0;
2246 }
2247
2248 /*
2249 * a STATFS request
2250 */
2251 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2252 {
2253 struct xdr_stream xdr;
2254 struct compound_hdr hdr = {
2255 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256 };
2257
2258 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2259 encode_compound_hdr(&xdr, req, &hdr);
2260 encode_sequence(&xdr, &args->seq_args, &hdr);
2261 encode_putfh(&xdr, args->fh, &hdr);
2262 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2263 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2264 encode_nops(&hdr);
2265 return 0;
2266 }
2267
2268 /*
2269 * GETATTR_BITMAP request
2270 */
2271 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2272 struct nfs4_server_caps_arg *args)
2273 {
2274 struct xdr_stream xdr;
2275 struct compound_hdr hdr = {
2276 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2277 };
2278
2279 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2280 encode_compound_hdr(&xdr, req, &hdr);
2281 encode_sequence(&xdr, &args->seq_args, &hdr);
2282 encode_putfh(&xdr, args->fhandle, &hdr);
2283 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2284 FATTR4_WORD0_LINK_SUPPORT|
2285 FATTR4_WORD0_SYMLINK_SUPPORT|
2286 FATTR4_WORD0_ACLSUPPORT, &hdr);
2287 encode_nops(&hdr);
2288 return 0;
2289 }
2290
2291 /*
2292 * a RENEW request
2293 */
2294 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2295 {
2296 struct xdr_stream xdr;
2297 struct compound_hdr hdr = {
2298 .nops = 0,
2299 };
2300
2301 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2302 encode_compound_hdr(&xdr, req, &hdr);
2303 encode_renew(&xdr, clp, &hdr);
2304 encode_nops(&hdr);
2305 return 0;
2306 }
2307
2308 /*
2309 * a SETCLIENTID request
2310 */
2311 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2312 {
2313 struct xdr_stream xdr;
2314 struct compound_hdr hdr = {
2315 .nops = 0,
2316 };
2317
2318 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2319 encode_compound_hdr(&xdr, req, &hdr);
2320 encode_setclientid(&xdr, sc, &hdr);
2321 encode_nops(&hdr);
2322 return 0;
2323 }
2324
2325 /*
2326 * a SETCLIENTID_CONFIRM request
2327 */
2328 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2329 {
2330 struct xdr_stream xdr;
2331 struct compound_hdr hdr = {
2332 .nops = 0,
2333 };
2334 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2335
2336 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2337 encode_compound_hdr(&xdr, req, &hdr);
2338 encode_setclientid_confirm(&xdr, clp, &hdr);
2339 encode_putrootfh(&xdr, &hdr);
2340 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2341 encode_nops(&hdr);
2342 return 0;
2343 }
2344
2345 /*
2346 * DELEGRETURN request
2347 */
2348 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2349 {
2350 struct xdr_stream xdr;
2351 struct compound_hdr hdr = {
2352 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2353 };
2354
2355 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2356 encode_compound_hdr(&xdr, req, &hdr);
2357 encode_sequence(&xdr, &args->seq_args, &hdr);
2358 encode_putfh(&xdr, args->fhandle, &hdr);
2359 encode_delegreturn(&xdr, args->stateid, &hdr);
2360 encode_getfattr(&xdr, args->bitmask, &hdr);
2361 encode_nops(&hdr);
2362 return 0;
2363 }
2364
2365 /*
2366 * Encode FS_LOCATIONS request
2367 */
2368 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2369 {
2370 struct xdr_stream xdr;
2371 struct compound_hdr hdr = {
2372 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2373 };
2374 uint32_t replen;
2375
2376 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2377 encode_compound_hdr(&xdr, req, &hdr);
2378 encode_sequence(&xdr, &args->seq_args, &hdr);
2379 encode_putfh(&xdr, args->dir_fh, &hdr);
2380 encode_lookup(&xdr, args->name, &hdr);
2381 replen = hdr.replen; /* get the attribute into args->page */
2382 encode_fs_locations(&xdr, args->bitmask, &hdr);
2383
2384 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2385 0, PAGE_SIZE);
2386 encode_nops(&hdr);
2387 return 0;
2388 }
2389
2390 #if defined(CONFIG_NFS_V4_1)
2391 /*
2392 * EXCHANGE_ID request
2393 */
2394 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2395 struct nfs41_exchange_id_args *args)
2396 {
2397 struct xdr_stream xdr;
2398 struct compound_hdr hdr = {
2399 .minorversion = args->client->cl_minorversion,
2400 };
2401
2402 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2403 encode_compound_hdr(&xdr, req, &hdr);
2404 encode_exchange_id(&xdr, args, &hdr);
2405 encode_nops(&hdr);
2406 return 0;
2407 }
2408
2409 /*
2410 * a CREATE_SESSION request
2411 */
2412 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2413 struct nfs41_create_session_args *args)
2414 {
2415 struct xdr_stream xdr;
2416 struct compound_hdr hdr = {
2417 .minorversion = args->client->cl_minorversion,
2418 };
2419
2420 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2421 encode_compound_hdr(&xdr, req, &hdr);
2422 encode_create_session(&xdr, args, &hdr);
2423 encode_nops(&hdr);
2424 return 0;
2425 }
2426
2427 /*
2428 * a DESTROY_SESSION request
2429 */
2430 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2431 struct nfs4_session *session)
2432 {
2433 struct xdr_stream xdr;
2434 struct compound_hdr hdr = {
2435 .minorversion = session->clp->cl_minorversion,
2436 };
2437
2438 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2439 encode_compound_hdr(&xdr, req, &hdr);
2440 encode_destroy_session(&xdr, session, &hdr);
2441 encode_nops(&hdr);
2442 return 0;
2443 }
2444
2445 /*
2446 * a SEQUENCE request
2447 */
2448 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2449 struct nfs4_sequence_args *args)
2450 {
2451 struct xdr_stream xdr;
2452 struct compound_hdr hdr = {
2453 .minorversion = nfs4_xdr_minorversion(args),
2454 };
2455
2456 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2457 encode_compound_hdr(&xdr, req, &hdr);
2458 encode_sequence(&xdr, args, &hdr);
2459 encode_nops(&hdr);
2460 return 0;
2461 }
2462
2463 /*
2464 * a GET_LEASE_TIME request
2465 */
2466 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2467 struct nfs4_get_lease_time_args *args)
2468 {
2469 struct xdr_stream xdr;
2470 struct compound_hdr hdr = {
2471 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2472 };
2473 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2474
2475 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2476 encode_compound_hdr(&xdr, req, &hdr);
2477 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2478 encode_putrootfh(&xdr, &hdr);
2479 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2480 encode_nops(&hdr);
2481 return 0;
2482 }
2483
2484 /*
2485 * a RECLAIM_COMPLETE request
2486 */
2487 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2488 struct nfs41_reclaim_complete_args *args)
2489 {
2490 struct xdr_stream xdr;
2491 struct compound_hdr hdr = {
2492 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2493 };
2494
2495 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2496 encode_compound_hdr(&xdr, req, &hdr);
2497 encode_sequence(&xdr, &args->seq_args, &hdr);
2498 encode_reclaim_complete(&xdr, args, &hdr);
2499 encode_nops(&hdr);
2500 return 0;
2501 }
2502
2503 #endif /* CONFIG_NFS_V4_1 */
2504
2505 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2506 {
2507 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2508 "Remaining buffer length is %tu words.\n",
2509 func, xdr->end - xdr->p);
2510 }
2511
2512 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2513 {
2514 __be32 *p;
2515
2516 p = xdr_inline_decode(xdr, 4);
2517 if (unlikely(!p))
2518 goto out_overflow;
2519 *len = be32_to_cpup(p);
2520 p = xdr_inline_decode(xdr, *len);
2521 if (unlikely(!p))
2522 goto out_overflow;
2523 *string = (char *)p;
2524 return 0;
2525 out_overflow:
2526 print_overflow_msg(__func__, xdr);
2527 return -EIO;
2528 }
2529
2530 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2531 {
2532 __be32 *p;
2533
2534 p = xdr_inline_decode(xdr, 8);
2535 if (unlikely(!p))
2536 goto out_overflow;
2537 hdr->status = be32_to_cpup(p++);
2538 hdr->taglen = be32_to_cpup(p);
2539
2540 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2541 if (unlikely(!p))
2542 goto out_overflow;
2543 hdr->tag = (char *)p;
2544 p += XDR_QUADLEN(hdr->taglen);
2545 hdr->nops = be32_to_cpup(p);
2546 if (unlikely(hdr->nops < 1))
2547 return nfs4_stat_to_errno(hdr->status);
2548 return 0;
2549 out_overflow:
2550 print_overflow_msg(__func__, xdr);
2551 return -EIO;
2552 }
2553
2554 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2555 {
2556 __be32 *p;
2557 uint32_t opnum;
2558 int32_t nfserr;
2559
2560 p = xdr_inline_decode(xdr, 8);
2561 if (unlikely(!p))
2562 goto out_overflow;
2563 opnum = be32_to_cpup(p++);
2564 if (opnum != expected) {
2565 dprintk("nfs: Server returned operation"
2566 " %d but we issued a request for %d\n",
2567 opnum, expected);
2568 return -EIO;
2569 }
2570 nfserr = be32_to_cpup(p);
2571 if (nfserr != NFS_OK)
2572 return nfs4_stat_to_errno(nfserr);
2573 return 0;
2574 out_overflow:
2575 print_overflow_msg(__func__, xdr);
2576 return -EIO;
2577 }
2578
2579 /* Dummy routine */
2580 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2581 {
2582 __be32 *p;
2583 unsigned int strlen;
2584 char *str;
2585
2586 p = xdr_inline_decode(xdr, 12);
2587 if (likely(p))
2588 return decode_opaque_inline(xdr, &strlen, &str);
2589 print_overflow_msg(__func__, xdr);
2590 return -EIO;
2591 }
2592
2593 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2594 {
2595 uint32_t bmlen;
2596 __be32 *p;
2597
2598 p = xdr_inline_decode(xdr, 4);
2599 if (unlikely(!p))
2600 goto out_overflow;
2601 bmlen = be32_to_cpup(p);
2602
2603 bitmap[0] = bitmap[1] = 0;
2604 p = xdr_inline_decode(xdr, (bmlen << 2));
2605 if (unlikely(!p))
2606 goto out_overflow;
2607 if (bmlen > 0) {
2608 bitmap[0] = be32_to_cpup(p++);
2609 if (bmlen > 1)
2610 bitmap[1] = be32_to_cpup(p);
2611 }
2612 return 0;
2613 out_overflow:
2614 print_overflow_msg(__func__, xdr);
2615 return -EIO;
2616 }
2617
2618 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2619 {
2620 __be32 *p;
2621
2622 p = xdr_inline_decode(xdr, 4);
2623 if (unlikely(!p))
2624 goto out_overflow;
2625 *attrlen = be32_to_cpup(p);
2626 *savep = xdr->p;
2627 return 0;
2628 out_overflow:
2629 print_overflow_msg(__func__, xdr);
2630 return -EIO;
2631 }
2632
2633 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2634 {
2635 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2636 decode_attr_bitmap(xdr, bitmask);
2637 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2638 } else
2639 bitmask[0] = bitmask[1] = 0;
2640 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2641 return 0;
2642 }
2643
2644 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2645 {
2646 __be32 *p;
2647 int ret = 0;
2648
2649 *type = 0;
2650 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2651 return -EIO;
2652 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2653 p = xdr_inline_decode(xdr, 4);
2654 if (unlikely(!p))
2655 goto out_overflow;
2656 *type = be32_to_cpup(p);
2657 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2658 dprintk("%s: bad type %d\n", __func__, *type);
2659 return -EIO;
2660 }
2661 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2662 ret = NFS_ATTR_FATTR_TYPE;
2663 }
2664 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2665 return ret;
2666 out_overflow:
2667 print_overflow_msg(__func__, xdr);
2668 return -EIO;
2669 }
2670
2671 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2672 {
2673 __be32 *p;
2674 int ret = 0;
2675
2676 *change = 0;
2677 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2678 return -EIO;
2679 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2680 p = xdr_inline_decode(xdr, 8);
2681 if (unlikely(!p))
2682 goto out_overflow;
2683 xdr_decode_hyper(p, change);
2684 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2685 ret = NFS_ATTR_FATTR_CHANGE;
2686 }
2687 dprintk("%s: change attribute=%Lu\n", __func__,
2688 (unsigned long long)*change);
2689 return ret;
2690 out_overflow:
2691 print_overflow_msg(__func__, xdr);
2692 return -EIO;
2693 }
2694
2695 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2696 {
2697 __be32 *p;
2698 int ret = 0;
2699
2700 *size = 0;
2701 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2702 return -EIO;
2703 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2704 p = xdr_inline_decode(xdr, 8);
2705 if (unlikely(!p))
2706 goto out_overflow;
2707 xdr_decode_hyper(p, size);
2708 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2709 ret = NFS_ATTR_FATTR_SIZE;
2710 }
2711 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2712 return ret;
2713 out_overflow:
2714 print_overflow_msg(__func__, xdr);
2715 return -EIO;
2716 }
2717
2718 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2719 {
2720 __be32 *p;
2721
2722 *res = 0;
2723 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2724 return -EIO;
2725 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2726 p = xdr_inline_decode(xdr, 4);
2727 if (unlikely(!p))
2728 goto out_overflow;
2729 *res = be32_to_cpup(p);
2730 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2731 }
2732 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2733 return 0;
2734 out_overflow:
2735 print_overflow_msg(__func__, xdr);
2736 return -EIO;
2737 }
2738
2739 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2740 {
2741 __be32 *p;
2742
2743 *res = 0;
2744 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2745 return -EIO;
2746 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2747 p = xdr_inline_decode(xdr, 4);
2748 if (unlikely(!p))
2749 goto out_overflow;
2750 *res = be32_to_cpup(p);
2751 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2752 }
2753 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2754 return 0;
2755 out_overflow:
2756 print_overflow_msg(__func__, xdr);
2757 return -EIO;
2758 }
2759
2760 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2761 {
2762 __be32 *p;
2763 int ret = 0;
2764
2765 fsid->major = 0;
2766 fsid->minor = 0;
2767 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2768 return -EIO;
2769 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2770 p = xdr_inline_decode(xdr, 16);
2771 if (unlikely(!p))
2772 goto out_overflow;
2773 p = xdr_decode_hyper(p, &fsid->major);
2774 xdr_decode_hyper(p, &fsid->minor);
2775 bitmap[0] &= ~FATTR4_WORD0_FSID;
2776 ret = NFS_ATTR_FATTR_FSID;
2777 }
2778 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2779 (unsigned long long)fsid->major,
2780 (unsigned long long)fsid->minor);
2781 return ret;
2782 out_overflow:
2783 print_overflow_msg(__func__, xdr);
2784 return -EIO;
2785 }
2786
2787 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2788 {
2789 __be32 *p;
2790
2791 *res = 60;
2792 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2793 return -EIO;
2794 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2795 p = xdr_inline_decode(xdr, 4);
2796 if (unlikely(!p))
2797 goto out_overflow;
2798 *res = be32_to_cpup(p);
2799 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2800 }
2801 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2802 return 0;
2803 out_overflow:
2804 print_overflow_msg(__func__, xdr);
2805 return -EIO;
2806 }
2807
2808 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2809 {
2810 __be32 *p;
2811
2812 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2813 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2814 return -EIO;
2815 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2816 p = xdr_inline_decode(xdr, 4);
2817 if (unlikely(!p))
2818 goto out_overflow;
2819 *res = be32_to_cpup(p);
2820 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2821 }
2822 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2823 return 0;
2824 out_overflow:
2825 print_overflow_msg(__func__, xdr);
2826 return -EIO;
2827 }
2828
2829 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2830 {
2831 __be32 *p;
2832 int ret = 0;
2833
2834 *fileid = 0;
2835 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2836 return -EIO;
2837 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2838 p = xdr_inline_decode(xdr, 8);
2839 if (unlikely(!p))
2840 goto out_overflow;
2841 xdr_decode_hyper(p, fileid);
2842 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2843 ret = NFS_ATTR_FATTR_FILEID;
2844 }
2845 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2846 return ret;
2847 out_overflow:
2848 print_overflow_msg(__func__, xdr);
2849 return -EIO;
2850 }
2851
2852 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2853 {
2854 __be32 *p;
2855 int ret = 0;
2856
2857 *fileid = 0;
2858 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2859 return -EIO;
2860 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2861 p = xdr_inline_decode(xdr, 8);
2862 if (unlikely(!p))
2863 goto out_overflow;
2864 xdr_decode_hyper(p, fileid);
2865 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2866 ret = NFS_ATTR_FATTR_FILEID;
2867 }
2868 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2869 return ret;
2870 out_overflow:
2871 print_overflow_msg(__func__, xdr);
2872 return -EIO;
2873 }
2874
2875 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2876 {
2877 __be32 *p;
2878 int status = 0;
2879
2880 *res = 0;
2881 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2882 return -EIO;
2883 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2884 p = xdr_inline_decode(xdr, 8);
2885 if (unlikely(!p))
2886 goto out_overflow;
2887 xdr_decode_hyper(p, res);
2888 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2889 }
2890 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2891 return status;
2892 out_overflow:
2893 print_overflow_msg(__func__, xdr);
2894 return -EIO;
2895 }
2896
2897 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2898 {
2899 __be32 *p;
2900 int status = 0;
2901
2902 *res = 0;
2903 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2904 return -EIO;
2905 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2906 p = xdr_inline_decode(xdr, 8);
2907 if (unlikely(!p))
2908 goto out_overflow;
2909 xdr_decode_hyper(p, res);
2910 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2911 }
2912 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2913 return status;
2914 out_overflow:
2915 print_overflow_msg(__func__, xdr);
2916 return -EIO;
2917 }
2918
2919 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2920 {
2921 __be32 *p;
2922 int status = 0;
2923
2924 *res = 0;
2925 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2926 return -EIO;
2927 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2928 p = xdr_inline_decode(xdr, 8);
2929 if (unlikely(!p))
2930 goto out_overflow;
2931 xdr_decode_hyper(p, res);
2932 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2933 }
2934 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2935 return status;
2936 out_overflow:
2937 print_overflow_msg(__func__, xdr);
2938 return -EIO;
2939 }
2940
2941 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2942 {
2943 u32 n;
2944 __be32 *p;
2945 int status = 0;
2946
2947 p = xdr_inline_decode(xdr, 4);
2948 if (unlikely(!p))
2949 goto out_overflow;
2950 n = be32_to_cpup(p);
2951 if (n == 0)
2952 goto root_path;
2953 dprintk("path ");
2954 path->ncomponents = 0;
2955 while (path->ncomponents < n) {
2956 struct nfs4_string *component = &path->components[path->ncomponents];
2957 status = decode_opaque_inline(xdr, &component->len, &component->data);
2958 if (unlikely(status != 0))
2959 goto out_eio;
2960 if (path->ncomponents != n)
2961 dprintk("/");
2962 dprintk("%s", component->data);
2963 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2964 path->ncomponents++;
2965 else {
2966 dprintk("cannot parse %d components in path\n", n);
2967 goto out_eio;
2968 }
2969 }
2970 out:
2971 dprintk("\n");
2972 return status;
2973 root_path:
2974 /* a root pathname is sent as a zero component4 */
2975 path->ncomponents = 1;
2976 path->components[0].len=0;
2977 path->components[0].data=NULL;
2978 dprintk("path /\n");
2979 goto out;
2980 out_eio:
2981 dprintk(" status %d", status);
2982 status = -EIO;
2983 goto out;
2984 out_overflow:
2985 print_overflow_msg(__func__, xdr);
2986 return -EIO;
2987 }
2988
2989 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2990 {
2991 int n;
2992 __be32 *p;
2993 int status = -EIO;
2994
2995 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2996 goto out;
2997 status = 0;
2998 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2999 goto out;
3000 dprintk("%s: fsroot ", __func__);
3001 status = decode_pathname(xdr, &res->fs_path);
3002 if (unlikely(status != 0))
3003 goto out;
3004 p = xdr_inline_decode(xdr, 4);
3005 if (unlikely(!p))
3006 goto out_overflow;
3007 n = be32_to_cpup(p);
3008 if (n <= 0)
3009 goto out_eio;
3010 res->nlocations = 0;
3011 while (res->nlocations < n) {
3012 u32 m;
3013 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3014
3015 p = xdr_inline_decode(xdr, 4);
3016 if (unlikely(!p))
3017 goto out_overflow;
3018 m = be32_to_cpup(p);
3019
3020 loc->nservers = 0;
3021 dprintk("%s: servers ", __func__);
3022 while (loc->nservers < m) {
3023 struct nfs4_string *server = &loc->servers[loc->nservers];
3024 status = decode_opaque_inline(xdr, &server->len, &server->data);
3025 if (unlikely(status != 0))
3026 goto out_eio;
3027 dprintk("%s ", server->data);
3028 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3029 loc->nservers++;
3030 else {
3031 unsigned int i;
3032 dprintk("%s: using first %u of %u servers "
3033 "returned for location %u\n",
3034 __func__,
3035 NFS4_FS_LOCATION_MAXSERVERS,
3036 m, res->nlocations);
3037 for (i = loc->nservers; i < m; i++) {
3038 unsigned int len;
3039 char *data;
3040 status = decode_opaque_inline(xdr, &len, &data);
3041 if (unlikely(status != 0))
3042 goto out_eio;
3043 }
3044 }
3045 }
3046 status = decode_pathname(xdr, &loc->rootpath);
3047 if (unlikely(status != 0))
3048 goto out_eio;
3049 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3050 res->nlocations++;
3051 }
3052 if (res->nlocations != 0)
3053 status = NFS_ATTR_FATTR_V4_REFERRAL;
3054 out:
3055 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3056 return status;
3057 out_overflow:
3058 print_overflow_msg(__func__, xdr);
3059 out_eio:
3060 status = -EIO;
3061 goto out;
3062 }
3063
3064 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3065 {
3066 __be32 *p;
3067 int status = 0;
3068
3069 *res = 0;
3070 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3071 return -EIO;
3072 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3073 p = xdr_inline_decode(xdr, 8);
3074 if (unlikely(!p))
3075 goto out_overflow;
3076 xdr_decode_hyper(p, res);
3077 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3078 }
3079 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3080 return status;
3081 out_overflow:
3082 print_overflow_msg(__func__, xdr);
3083 return -EIO;
3084 }
3085
3086 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3087 {
3088 __be32 *p;
3089 int status = 0;
3090
3091 *maxlink = 1;
3092 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3093 return -EIO;
3094 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3095 p = xdr_inline_decode(xdr, 4);
3096 if (unlikely(!p))
3097 goto out_overflow;
3098 *maxlink = be32_to_cpup(p);
3099 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3100 }
3101 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3102 return status;
3103 out_overflow:
3104 print_overflow_msg(__func__, xdr);
3105 return -EIO;
3106 }
3107
3108 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3109 {
3110 __be32 *p;
3111 int status = 0;
3112
3113 *maxname = 1024;
3114 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3115 return -EIO;
3116 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3117 p = xdr_inline_decode(xdr, 4);
3118 if (unlikely(!p))
3119 goto out_overflow;
3120 *maxname = be32_to_cpup(p);
3121 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3122 }
3123 dprintk("%s: maxname=%u\n", __func__, *maxname);
3124 return status;
3125 out_overflow:
3126 print_overflow_msg(__func__, xdr);
3127 return -EIO;
3128 }
3129
3130 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3131 {
3132 __be32 *p;
3133 int status = 0;
3134
3135 *res = 1024;
3136 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3137 return -EIO;
3138 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3139 uint64_t maxread;
3140 p = xdr_inline_decode(xdr, 8);
3141 if (unlikely(!p))
3142 goto out_overflow;
3143 xdr_decode_hyper(p, &maxread);
3144 if (maxread > 0x7FFFFFFF)
3145 maxread = 0x7FFFFFFF;
3146 *res = (uint32_t)maxread;
3147 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3148 }
3149 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3150 return status;
3151 out_overflow:
3152 print_overflow_msg(__func__, xdr);
3153 return -EIO;
3154 }
3155
3156 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3157 {
3158 __be32 *p;
3159 int status = 0;
3160
3161 *res = 1024;
3162 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3163 return -EIO;
3164 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3165 uint64_t maxwrite;
3166 p = xdr_inline_decode(xdr, 8);
3167 if (unlikely(!p))
3168 goto out_overflow;
3169 xdr_decode_hyper(p, &maxwrite);
3170 if (maxwrite > 0x7FFFFFFF)
3171 maxwrite = 0x7FFFFFFF;
3172 *res = (uint32_t)maxwrite;
3173 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3174 }
3175 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3176 return status;
3177 out_overflow:
3178 print_overflow_msg(__func__, xdr);
3179 return -EIO;
3180 }
3181
3182 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3183 {
3184 uint32_t tmp;
3185 __be32 *p;
3186 int ret = 0;
3187
3188 *mode = 0;
3189 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3190 return -EIO;
3191 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3192 p = xdr_inline_decode(xdr, 4);
3193 if (unlikely(!p))
3194 goto out_overflow;
3195 tmp = be32_to_cpup(p);
3196 *mode = tmp & ~S_IFMT;
3197 bitmap[1] &= ~FATTR4_WORD1_MODE;
3198 ret = NFS_ATTR_FATTR_MODE;
3199 }
3200 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3201 return ret;
3202 out_overflow:
3203 print_overflow_msg(__func__, xdr);
3204 return -EIO;
3205 }
3206
3207 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3208 {
3209 __be32 *p;
3210 int ret = 0;
3211
3212 *nlink = 1;
3213 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3214 return -EIO;
3215 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3216 p = xdr_inline_decode(xdr, 4);
3217 if (unlikely(!p))
3218 goto out_overflow;
3219 *nlink = be32_to_cpup(p);
3220 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3221 ret = NFS_ATTR_FATTR_NLINK;
3222 }
3223 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3224 return ret;
3225 out_overflow:
3226 print_overflow_msg(__func__, xdr);
3227 return -EIO;
3228 }
3229
3230 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3231 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3232 {
3233 uint32_t len;
3234 __be32 *p;
3235 int ret = 0;
3236
3237 *uid = -2;
3238 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3239 return -EIO;
3240 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3241 p = xdr_inline_decode(xdr, 4);
3242 if (unlikely(!p))
3243 goto out_overflow;
3244 len = be32_to_cpup(p);
3245 p = xdr_inline_decode(xdr, len);
3246 if (unlikely(!p))
3247 goto out_overflow;
3248 if (!may_sleep) {
3249 /* do nothing */
3250 } else if (len < XDR_MAX_NETOBJ) {
3251 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3252 ret = NFS_ATTR_FATTR_OWNER;
3253 else
3254 dprintk("%s: nfs_map_name_to_uid failed!\n",
3255 __func__);
3256 } else
3257 dprintk("%s: name too long (%u)!\n",
3258 __func__, len);
3259 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3260 }
3261 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3262 return ret;
3263 out_overflow:
3264 print_overflow_msg(__func__, xdr);
3265 return -EIO;
3266 }
3267
3268 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3269 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3270 {
3271 uint32_t len;
3272 __be32 *p;
3273 int ret = 0;
3274
3275 *gid = -2;
3276 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3277 return -EIO;
3278 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3279 p = xdr_inline_decode(xdr, 4);
3280 if (unlikely(!p))
3281 goto out_overflow;
3282 len = be32_to_cpup(p);
3283 p = xdr_inline_decode(xdr, len);
3284 if (unlikely(!p))
3285 goto out_overflow;
3286 if (!may_sleep) {
3287 /* do nothing */
3288 } else if (len < XDR_MAX_NETOBJ) {
3289 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3290 ret = NFS_ATTR_FATTR_GROUP;
3291 else
3292 dprintk("%s: nfs_map_group_to_gid failed!\n",
3293 __func__);
3294 } else
3295 dprintk("%s: name too long (%u)!\n",
3296 __func__, len);
3297 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3298 }
3299 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3300 return ret;
3301 out_overflow:
3302 print_overflow_msg(__func__, xdr);
3303 return -EIO;
3304 }
3305
3306 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3307 {
3308 uint32_t major = 0, minor = 0;
3309 __be32 *p;
3310 int ret = 0;
3311
3312 *rdev = MKDEV(0,0);
3313 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3314 return -EIO;
3315 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3316 dev_t tmp;
3317
3318 p = xdr_inline_decode(xdr, 8);
3319 if (unlikely(!p))
3320 goto out_overflow;
3321 major = be32_to_cpup(p++);
3322 minor = be32_to_cpup(p);
3323 tmp = MKDEV(major, minor);
3324 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3325 *rdev = tmp;
3326 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3327 ret = NFS_ATTR_FATTR_RDEV;
3328 }
3329 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3330 return ret;
3331 out_overflow:
3332 print_overflow_msg(__func__, xdr);
3333 return -EIO;
3334 }
3335
3336 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3337 {
3338 __be32 *p;
3339 int status = 0;
3340
3341 *res = 0;
3342 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3343 return -EIO;
3344 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3345 p = xdr_inline_decode(xdr, 8);
3346 if (unlikely(!p))
3347 goto out_overflow;
3348 xdr_decode_hyper(p, res);
3349 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3350 }
3351 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3352 return status;
3353 out_overflow:
3354 print_overflow_msg(__func__, xdr);
3355 return -EIO;
3356 }
3357
3358 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3359 {
3360 __be32 *p;
3361 int status = 0;
3362
3363 *res = 0;
3364 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3365 return -EIO;
3366 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3367 p = xdr_inline_decode(xdr, 8);
3368 if (unlikely(!p))
3369 goto out_overflow;
3370 xdr_decode_hyper(p, res);
3371 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3372 }
3373 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3374 return status;
3375 out_overflow:
3376 print_overflow_msg(__func__, xdr);
3377 return -EIO;
3378 }
3379
3380 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3381 {
3382 __be32 *p;
3383 int status = 0;
3384
3385 *res = 0;
3386 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3387 return -EIO;
3388 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3389 p = xdr_inline_decode(xdr, 8);
3390 if (unlikely(!p))
3391 goto out_overflow;
3392 xdr_decode_hyper(p, res);
3393 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3394 }
3395 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3396 return status;
3397 out_overflow:
3398 print_overflow_msg(__func__, xdr);
3399 return -EIO;
3400 }
3401
3402 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3403 {
3404 __be32 *p;
3405 int ret = 0;
3406
3407 *used = 0;
3408 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3409 return -EIO;
3410 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3411 p = xdr_inline_decode(xdr, 8);
3412 if (unlikely(!p))
3413 goto out_overflow;
3414 xdr_decode_hyper(p, used);
3415 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3416 ret = NFS_ATTR_FATTR_SPACE_USED;
3417 }
3418 dprintk("%s: space used=%Lu\n", __func__,
3419 (unsigned long long)*used);
3420 return ret;
3421 out_overflow:
3422 print_overflow_msg(__func__, xdr);
3423 return -EIO;
3424 }
3425
3426 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3427 {
3428 __be32 *p;
3429 uint64_t sec;
3430 uint32_t nsec;
3431
3432 p = xdr_inline_decode(xdr, 12);
3433 if (unlikely(!p))
3434 goto out_overflow;
3435 p = xdr_decode_hyper(p, &sec);
3436 nsec = be32_to_cpup(p);
3437 time->tv_sec = (time_t)sec;
3438 time->tv_nsec = (long)nsec;
3439 return 0;
3440 out_overflow:
3441 print_overflow_msg(__func__, xdr);
3442 return -EIO;
3443 }
3444
3445 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3446 {
3447 int status = 0;
3448
3449 time->tv_sec = 0;
3450 time->tv_nsec = 0;
3451 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3452 return -EIO;
3453 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3454 status = decode_attr_time(xdr, time);
3455 if (status == 0)
3456 status = NFS_ATTR_FATTR_ATIME;
3457 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3458 }
3459 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3460 return status;
3461 }
3462
3463 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3464 {
3465 int status = 0;
3466
3467 time->tv_sec = 0;
3468 time->tv_nsec = 0;
3469 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3470 return -EIO;
3471 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3472 status = decode_attr_time(xdr, time);
3473 if (status == 0)
3474 status = NFS_ATTR_FATTR_CTIME;
3475 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3476 }
3477 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3478 return status;
3479 }
3480
3481 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3482 {
3483 int status = 0;
3484
3485 time->tv_sec = 0;
3486 time->tv_nsec = 0;
3487 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3488 return -EIO;
3489 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3490 status = decode_attr_time(xdr, time);
3491 if (status == 0)
3492 status = NFS_ATTR_FATTR_MTIME;
3493 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3494 }
3495 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3496 return status;
3497 }
3498
3499 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3500 {
3501 unsigned int attrwords = XDR_QUADLEN(attrlen);
3502 unsigned int nwords = xdr->p - savep;
3503
3504 if (unlikely(attrwords != nwords)) {
3505 dprintk("%s: server returned incorrect attribute length: "
3506 "%u %c %u\n",
3507 __func__,
3508 attrwords << 2,
3509 (attrwords < nwords) ? '<' : '>',
3510 nwords << 2);
3511 return -EIO;
3512 }
3513 return 0;
3514 }
3515
3516 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3517 {
3518 __be32 *p;
3519
3520 p = xdr_inline_decode(xdr, 20);
3521 if (unlikely(!p))
3522 goto out_overflow;
3523 cinfo->atomic = be32_to_cpup(p++);
3524 p = xdr_decode_hyper(p, &cinfo->before);
3525 xdr_decode_hyper(p, &cinfo->after);
3526 return 0;
3527 out_overflow:
3528 print_overflow_msg(__func__, xdr);
3529 return -EIO;
3530 }
3531
3532 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3533 {
3534 __be32 *p;
3535 uint32_t supp, acc;
3536 int status;
3537
3538 status = decode_op_hdr(xdr, OP_ACCESS);
3539 if (status)
3540 return status;
3541 p = xdr_inline_decode(xdr, 8);
3542 if (unlikely(!p))
3543 goto out_overflow;
3544 supp = be32_to_cpup(p++);
3545 acc = be32_to_cpup(p);
3546 access->supported = supp;
3547 access->access = acc;
3548 return 0;
3549 out_overflow:
3550 print_overflow_msg(__func__, xdr);
3551 return -EIO;
3552 }
3553
3554 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3555 {
3556 __be32 *p;
3557
3558 p = xdr_inline_decode(xdr, len);
3559 if (likely(p)) {
3560 memcpy(buf, p, len);
3561 return 0;
3562 }
3563 print_overflow_msg(__func__, xdr);
3564 return -EIO;
3565 }
3566
3567 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3568 {
3569 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3570 }
3571
3572 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3573 {
3574 int status;
3575
3576 status = decode_op_hdr(xdr, OP_CLOSE);
3577 if (status != -EIO)
3578 nfs_increment_open_seqid(status, res->seqid);
3579 if (!status)
3580 status = decode_stateid(xdr, &res->stateid);
3581 return status;
3582 }
3583
3584 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3585 {
3586 return decode_opaque_fixed(xdr, verifier, 8);
3587 }
3588
3589 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3590 {
3591 int status;
3592
3593 status = decode_op_hdr(xdr, OP_COMMIT);
3594 if (!status)
3595 status = decode_verifier(xdr, res->verf->verifier);
3596 return status;
3597 }
3598
3599 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3600 {
3601 __be32 *p;
3602 uint32_t bmlen;
3603 int status;
3604
3605 status = decode_op_hdr(xdr, OP_CREATE);
3606 if (status)
3607 return status;
3608 if ((status = decode_change_info(xdr, cinfo)))
3609 return status;
3610 p = xdr_inline_decode(xdr, 4);
3611 if (unlikely(!p))
3612 goto out_overflow;
3613 bmlen = be32_to_cpup(p);
3614 p = xdr_inline_decode(xdr, bmlen << 2);
3615 if (likely(p))
3616 return 0;
3617 out_overflow:
3618 print_overflow_msg(__func__, xdr);
3619 return -EIO;
3620 }
3621
3622 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3623 {
3624 __be32 *savep;
3625 uint32_t attrlen, bitmap[2] = {0};
3626 int status;
3627
3628 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3629 goto xdr_error;
3630 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3631 goto xdr_error;
3632 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3633 goto xdr_error;
3634 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3635 goto xdr_error;
3636 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3637 goto xdr_error;
3638 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3639 goto xdr_error;
3640 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3641 goto xdr_error;
3642 status = verify_attr_len(xdr, savep, attrlen);
3643 xdr_error:
3644 dprintk("%s: xdr returned %d!\n", __func__, -status);
3645 return status;
3646 }
3647
3648 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3649 {
3650 __be32 *savep;
3651 uint32_t attrlen, bitmap[2] = {0};
3652 int status;
3653
3654 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3655 goto xdr_error;
3656 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3657 goto xdr_error;
3658 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3659 goto xdr_error;
3660
3661 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3662 goto xdr_error;
3663 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3664 goto xdr_error;
3665 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3666 goto xdr_error;
3667 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3668 goto xdr_error;
3669 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3670 goto xdr_error;
3671 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3672 goto xdr_error;
3673
3674 status = verify_attr_len(xdr, savep, attrlen);
3675 xdr_error:
3676 dprintk("%s: xdr returned %d!\n", __func__, -status);
3677 return status;
3678 }
3679
3680 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3681 {
3682 __be32 *savep;
3683 uint32_t attrlen, bitmap[2] = {0};
3684 int status;
3685
3686 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3687 goto xdr_error;
3688 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3689 goto xdr_error;
3690 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3691 goto xdr_error;
3692
3693 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3694 goto xdr_error;
3695 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3696 goto xdr_error;
3697
3698 status = verify_attr_len(xdr, savep, attrlen);
3699 xdr_error:
3700 dprintk("%s: xdr returned %d!\n", __func__, -status);
3701 return status;
3702 }
3703
3704 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3705 const struct nfs_server *server, int may_sleep)
3706 {
3707 __be32 *savep;
3708 uint32_t attrlen,
3709 bitmap[2] = {0},
3710 type;
3711 int status;
3712 umode_t fmode = 0;
3713 uint64_t fileid;
3714
3715 status = decode_op_hdr(xdr, OP_GETATTR);
3716 if (status < 0)
3717 goto xdr_error;
3718
3719 status = decode_attr_bitmap(xdr, bitmap);
3720 if (status < 0)
3721 goto xdr_error;
3722
3723 status = decode_attr_length(xdr, &attrlen, &savep);
3724 if (status < 0)
3725 goto xdr_error;
3726
3727
3728 status = decode_attr_type(xdr, bitmap, &type);
3729 if (status < 0)
3730 goto xdr_error;
3731 fattr->mode = 0;
3732 if (status != 0) {
3733 fattr->mode |= nfs_type2fmt[type];
3734 fattr->valid |= status;
3735 }
3736
3737 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3738 if (status < 0)
3739 goto xdr_error;
3740 fattr->valid |= status;
3741
3742 status = decode_attr_size(xdr, bitmap, &fattr->size);
3743 if (status < 0)
3744 goto xdr_error;
3745 fattr->valid |= status;
3746
3747 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3748 if (status < 0)
3749 goto xdr_error;
3750 fattr->valid |= status;
3751
3752 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3753 if (status < 0)
3754 goto xdr_error;
3755 fattr->valid |= status;
3756
3757 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3758 struct nfs4_fs_locations,
3759 fattr));
3760 if (status < 0)
3761 goto xdr_error;
3762 fattr->valid |= status;
3763
3764 status = decode_attr_mode(xdr, bitmap, &fmode);
3765 if (status < 0)
3766 goto xdr_error;
3767 if (status != 0) {
3768 fattr->mode |= fmode;
3769 fattr->valid |= status;
3770 }
3771
3772 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3773 if (status < 0)
3774 goto xdr_error;
3775 fattr->valid |= status;
3776
3777 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3778 &fattr->uid, may_sleep);
3779 if (status < 0)
3780 goto xdr_error;
3781 fattr->valid |= status;
3782
3783 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3784 &fattr->gid, may_sleep);
3785 if (status < 0)
3786 goto xdr_error;
3787 fattr->valid |= status;
3788
3789 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3790 if (status < 0)
3791 goto xdr_error;
3792 fattr->valid |= status;
3793
3794 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3795 if (status < 0)
3796 goto xdr_error;
3797 fattr->valid |= status;
3798
3799 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3800 if (status < 0)
3801 goto xdr_error;
3802 fattr->valid |= status;
3803
3804 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3805 if (status < 0)
3806 goto xdr_error;
3807 fattr->valid |= status;
3808
3809 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3810 if (status < 0)
3811 goto xdr_error;
3812 fattr->valid |= status;
3813
3814 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3815 if (status < 0)
3816 goto xdr_error;
3817 if (status != 0 && !(fattr->valid & status)) {
3818 fattr->fileid = fileid;
3819 fattr->valid |= status;
3820 }
3821
3822 status = verify_attr_len(xdr, savep, attrlen);
3823 xdr_error:
3824 dprintk("%s: xdr returned %d\n", __func__, -status);
3825 return status;
3826 }
3827
3828
3829 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3830 {
3831 __be32 *savep;
3832 uint32_t attrlen, bitmap[2];
3833 int status;
3834
3835 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3836 goto xdr_error;
3837 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3838 goto xdr_error;
3839 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3840 goto xdr_error;
3841
3842 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3843
3844 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3845 goto xdr_error;
3846 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3847 goto xdr_error;
3848 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3849 goto xdr_error;
3850 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3851 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3852 goto xdr_error;
3853 fsinfo->wtpref = fsinfo->wtmax;
3854
3855 status = verify_attr_len(xdr, savep, attrlen);
3856 xdr_error:
3857 dprintk("%s: xdr returned %d!\n", __func__, -status);
3858 return status;
3859 }
3860
3861 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3862 {
3863 __be32 *p;
3864 uint32_t len;
3865 int status;
3866
3867 /* Zero handle first to allow comparisons */
3868 memset(fh, 0, sizeof(*fh));
3869
3870 status = decode_op_hdr(xdr, OP_GETFH);
3871 if (status)
3872 return status;
3873
3874 p = xdr_inline_decode(xdr, 4);
3875 if (unlikely(!p))
3876 goto out_overflow;
3877 len = be32_to_cpup(p);
3878 if (len > NFS4_FHSIZE)
3879 return -EIO;
3880 fh->size = len;
3881 p = xdr_inline_decode(xdr, len);
3882 if (unlikely(!p))
3883 goto out_overflow;
3884 memcpy(fh->data, p, len);
3885 return 0;
3886 out_overflow:
3887 print_overflow_msg(__func__, xdr);
3888 return -EIO;
3889 }
3890
3891 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3892 {
3893 int status;
3894
3895 status = decode_op_hdr(xdr, OP_LINK);
3896 if (status)
3897 return status;
3898 return decode_change_info(xdr, cinfo);
3899 }
3900
3901 /*
3902 * We create the owner, so we know a proper owner.id length is 4.
3903 */
3904 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3905 {
3906 uint64_t offset, length, clientid;
3907 __be32 *p;
3908 uint32_t namelen, type;
3909
3910 p = xdr_inline_decode(xdr, 32);
3911 if (unlikely(!p))
3912 goto out_overflow;
3913 p = xdr_decode_hyper(p, &offset);
3914 p = xdr_decode_hyper(p, &length);
3915 type = be32_to_cpup(p++);
3916 if (fl != NULL) {
3917 fl->fl_start = (loff_t)offset;
3918 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3919 if (length == ~(uint64_t)0)
3920 fl->fl_end = OFFSET_MAX;
3921 fl->fl_type = F_WRLCK;
3922 if (type & 1)
3923 fl->fl_type = F_RDLCK;
3924 fl->fl_pid = 0;
3925 }
3926 p = xdr_decode_hyper(p, &clientid);
3927 namelen = be32_to_cpup(p);
3928 p = xdr_inline_decode(xdr, namelen);
3929 if (likely(p))
3930 return -NFS4ERR_DENIED;
3931 out_overflow:
3932 print_overflow_msg(__func__, xdr);
3933 return -EIO;
3934 }
3935
3936 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3937 {
3938 int status;
3939
3940 status = decode_op_hdr(xdr, OP_LOCK);
3941 if (status == -EIO)
3942 goto out;
3943 if (status == 0) {
3944 status = decode_stateid(xdr, &res->stateid);
3945 if (unlikely(status))
3946 goto out;
3947 } else if (status == -NFS4ERR_DENIED)
3948 status = decode_lock_denied(xdr, NULL);
3949 if (res->open_seqid != NULL)
3950 nfs_increment_open_seqid(status, res->open_seqid);
3951 nfs_increment_lock_seqid(status, res->lock_seqid);
3952 out:
3953 return status;
3954 }
3955
3956 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3957 {
3958 int status;
3959 status = decode_op_hdr(xdr, OP_LOCKT);
3960 if (status == -NFS4ERR_DENIED)
3961 return decode_lock_denied(xdr, res->denied);
3962 return status;
3963 }
3964
3965 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3966 {
3967 int status;
3968
3969 status = decode_op_hdr(xdr, OP_LOCKU);
3970 if (status != -EIO)
3971 nfs_increment_lock_seqid(status, res->seqid);
3972 if (status == 0)
3973 status = decode_stateid(xdr, &res->stateid);
3974 return status;
3975 }
3976
3977 static int decode_lookup(struct xdr_stream *xdr)
3978 {
3979 return decode_op_hdr(xdr, OP_LOOKUP);
3980 }
3981
3982 /* This is too sick! */
3983 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3984 {
3985 __be32 *p;
3986 uint32_t limit_type, nblocks, blocksize;
3987
3988 p = xdr_inline_decode(xdr, 12);
3989 if (unlikely(!p))
3990 goto out_overflow;
3991 limit_type = be32_to_cpup(p++);
3992 switch (limit_type) {
3993 case 1:
3994 xdr_decode_hyper(p, maxsize);
3995 break;
3996 case 2:
3997 nblocks = be32_to_cpup(p++);
3998 blocksize = be32_to_cpup(p);
3999 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4000 }
4001 return 0;
4002 out_overflow:
4003 print_overflow_msg(__func__, xdr);
4004 return -EIO;
4005 }
4006
4007 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4008 {
4009 __be32 *p;
4010 uint32_t delegation_type;
4011 int status;
4012
4013 p = xdr_inline_decode(xdr, 4);
4014 if (unlikely(!p))
4015 goto out_overflow;
4016 delegation_type = be32_to_cpup(p);
4017 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4018 res->delegation_type = 0;
4019 return 0;
4020 }
4021 status = decode_stateid(xdr, &res->delegation);
4022 if (unlikely(status))
4023 return status;
4024 p = xdr_inline_decode(xdr, 4);
4025 if (unlikely(!p))
4026 goto out_overflow;
4027 res->do_recall = be32_to_cpup(p);
4028
4029 switch (delegation_type) {
4030 case NFS4_OPEN_DELEGATE_READ:
4031 res->delegation_type = FMODE_READ;
4032 break;
4033 case NFS4_OPEN_DELEGATE_WRITE:
4034 res->delegation_type = FMODE_WRITE|FMODE_READ;
4035 if (decode_space_limit(xdr, &res->maxsize) < 0)
4036 return -EIO;
4037 }
4038 return decode_ace(xdr, NULL, res->server->nfs_client);
4039 out_overflow:
4040 print_overflow_msg(__func__, xdr);
4041 return -EIO;
4042 }
4043
4044 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4045 {
4046 __be32 *p;
4047 uint32_t savewords, bmlen, i;
4048 int status;
4049
4050 status = decode_op_hdr(xdr, OP_OPEN);
4051 if (status != -EIO)
4052 nfs_increment_open_seqid(status, res->seqid);
4053 if (!status)
4054 status = decode_stateid(xdr, &res->stateid);
4055 if (unlikely(status))
4056 return status;
4057
4058 decode_change_info(xdr, &res->cinfo);
4059
4060 p = xdr_inline_decode(xdr, 8);
4061 if (unlikely(!p))
4062 goto out_overflow;
4063 res->rflags = be32_to_cpup(p++);
4064 bmlen = be32_to_cpup(p);
4065 if (bmlen > 10)
4066 goto xdr_error;
4067
4068 p = xdr_inline_decode(xdr, bmlen << 2);
4069 if (unlikely(!p))
4070 goto out_overflow;
4071 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4072 for (i = 0; i < savewords; ++i)
4073 res->attrset[i] = be32_to_cpup(p++);
4074 for (; i < NFS4_BITMAP_SIZE; i++)
4075 res->attrset[i] = 0;
4076
4077 return decode_delegation(xdr, res);
4078 xdr_error:
4079 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4080 return -EIO;
4081 out_overflow:
4082 print_overflow_msg(__func__, xdr);
4083 return -EIO;
4084 }
4085
4086 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4087 {
4088 int status;
4089
4090 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4091 if (status != -EIO)
4092 nfs_increment_open_seqid(status, res->seqid);
4093 if (!status)
4094 status = decode_stateid(xdr, &res->stateid);
4095 return status;
4096 }
4097
4098 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4099 {
4100 int status;
4101
4102 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4103 if (status != -EIO)
4104 nfs_increment_open_seqid(status, res->seqid);
4105 if (!status)
4106 status = decode_stateid(xdr, &res->stateid);
4107 return status;
4108 }
4109
4110 static int decode_putfh(struct xdr_stream *xdr)
4111 {
4112 return decode_op_hdr(xdr, OP_PUTFH);
4113 }
4114
4115 static int decode_putrootfh(struct xdr_stream *xdr)
4116 {
4117 return decode_op_hdr(xdr, OP_PUTROOTFH);
4118 }
4119
4120 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4121 {
4122 struct kvec *iov = req->rq_rcv_buf.head;
4123 __be32 *p;
4124 uint32_t count, eof, recvd, hdrlen;
4125 int status;
4126
4127 status = decode_op_hdr(xdr, OP_READ);
4128 if (status)
4129 return status;
4130 p = xdr_inline_decode(xdr, 8);
4131 if (unlikely(!p))
4132 goto out_overflow;
4133 eof = be32_to_cpup(p++);
4134 count = be32_to_cpup(p);
4135 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4136 recvd = req->rq_rcv_buf.len - hdrlen;
4137 if (count > recvd) {
4138 dprintk("NFS: server cheating in read reply: "
4139 "count %u > recvd %u\n", count, recvd);
4140 count = recvd;
4141 eof = 0;
4142 }
4143 xdr_read_pages(xdr, count);
4144 res->eof = eof;
4145 res->count = count;
4146 return 0;
4147 out_overflow:
4148 print_overflow_msg(__func__, xdr);
4149 return -EIO;
4150 }
4151
4152 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4153 {
4154 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4155 struct page *page = *rcvbuf->pages;
4156 struct kvec *iov = rcvbuf->head;
4157 size_t hdrlen;
4158 u32 recvd, pglen = rcvbuf->page_len;
4159 __be32 *end, *entry, *p, *kaddr;
4160 unsigned int nr = 0;
4161 int status;
4162
4163 status = decode_op_hdr(xdr, OP_READDIR);
4164 if (!status)
4165 status = decode_verifier(xdr, readdir->verifier.data);
4166 if (unlikely(status))
4167 return status;
4168 dprintk("%s: verifier = %08x:%08x\n",
4169 __func__,
4170 ((u32 *)readdir->verifier.data)[0],
4171 ((u32 *)readdir->verifier.data)[1]);
4172
4173
4174 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4175 recvd = rcvbuf->len - hdrlen;
4176 if (pglen > recvd)
4177 pglen = recvd;
4178 xdr_read_pages(xdr, pglen);
4179
4180 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4181 kaddr = p = kmap_atomic(page, KM_USER0);
4182 end = p + ((pglen + readdir->pgbase) >> 2);
4183 entry = p;
4184
4185 /* Make sure the packet actually has a value_follows and EOF entry */
4186 if ((entry + 1) > end)
4187 goto short_pkt;
4188
4189 for (; *p++; nr++) {
4190 u32 len, attrlen, xlen;
4191 if (end - p < 3)
4192 goto short_pkt;
4193 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4194 p += 2; /* cookie */
4195 len = ntohl(*p++); /* filename length */
4196 if (len > NFS4_MAXNAMLEN) {
4197 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4198 len);
4199 goto err_unmap;
4200 }
4201 xlen = XDR_QUADLEN(len);
4202 if (end - p < xlen + 1)
4203 goto short_pkt;
4204 dprintk("filename = %*s\n", len, (char *)p);
4205 p += xlen;
4206 len = ntohl(*p++); /* bitmap length */
4207 if (end - p < len + 1)
4208 goto short_pkt;
4209 p += len;
4210 attrlen = XDR_QUADLEN(ntohl(*p++));
4211 if (end - p < attrlen + 2)
4212 goto short_pkt;
4213 p += attrlen; /* attributes */
4214 entry = p;
4215 }
4216 /*
4217 * Apparently some server sends responses that are a valid size, but
4218 * contain no entries, and have value_follows==0 and EOF==0. For
4219 * those, just set the EOF marker.
4220 */
4221 if (!nr && entry[1] == 0) {
4222 dprintk("NFS: readdir reply truncated!\n");
4223 entry[1] = 1;
4224 }
4225 out:
4226 kunmap_atomic(kaddr, KM_USER0);
4227 return 0;
4228 short_pkt:
4229 /*
4230 * When we get a short packet there are 2 possibilities. We can
4231 * return an error, or fix up the response to look like a valid
4232 * response and return what we have so far. If there are no
4233 * entries and the packet was short, then return -EIO. If there
4234 * are valid entries in the response, return them and pretend that
4235 * the call was successful, but incomplete. The caller can retry the
4236 * readdir starting at the last cookie.
4237 */
4238 dprintk("%s: short packet at entry %d\n", __func__, nr);
4239 entry[0] = entry[1] = 0;
4240 if (nr)
4241 goto out;
4242 err_unmap:
4243 kunmap_atomic(kaddr, KM_USER0);
4244 return -errno_NFSERR_IO;
4245 }
4246
4247 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4248 {
4249 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4250 struct kvec *iov = rcvbuf->head;
4251 size_t hdrlen;
4252 u32 len, recvd;
4253 __be32 *p;
4254 char *kaddr;
4255 int status;
4256
4257 status = decode_op_hdr(xdr, OP_READLINK);
4258 if (status)
4259 return status;
4260
4261 /* Convert length of symlink */
4262 p = xdr_inline_decode(xdr, 4);
4263 if (unlikely(!p))
4264 goto out_overflow;
4265 len = be32_to_cpup(p);
4266 if (len >= rcvbuf->page_len || len <= 0) {
4267 dprintk("nfs: server returned giant symlink!\n");
4268 return -ENAMETOOLONG;
4269 }
4270 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4271 recvd = req->rq_rcv_buf.len - hdrlen;
4272 if (recvd < len) {
4273 dprintk("NFS: server cheating in readlink reply: "
4274 "count %u > recvd %u\n", len, recvd);
4275 return -EIO;
4276 }
4277 xdr_read_pages(xdr, len);
4278 /*
4279 * The XDR encode routine has set things up so that
4280 * the link text will be copied directly into the
4281 * buffer. We just have to do overflow-checking,
4282 * and and null-terminate the text (the VFS expects
4283 * null-termination).
4284 */
4285 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4286 kaddr[len+rcvbuf->page_base] = '\0';
4287 kunmap_atomic(kaddr, KM_USER0);
4288 return 0;
4289 out_overflow:
4290 print_overflow_msg(__func__, xdr);
4291 return -EIO;
4292 }
4293
4294 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4295 {
4296 int status;
4297
4298 status = decode_op_hdr(xdr, OP_REMOVE);
4299 if (status)
4300 goto out;
4301 status = decode_change_info(xdr, cinfo);
4302 out:
4303 return status;
4304 }
4305
4306 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4307 struct nfs4_change_info *new_cinfo)
4308 {
4309 int status;
4310
4311 status = decode_op_hdr(xdr, OP_RENAME);
4312 if (status)
4313 goto out;
4314 if ((status = decode_change_info(xdr, old_cinfo)))
4315 goto out;
4316 status = decode_change_info(xdr, new_cinfo);
4317 out:
4318 return status;
4319 }
4320
4321 static int decode_renew(struct xdr_stream *xdr)
4322 {
4323 return decode_op_hdr(xdr, OP_RENEW);
4324 }
4325
4326 static int
4327 decode_restorefh(struct xdr_stream *xdr)
4328 {
4329 return decode_op_hdr(xdr, OP_RESTOREFH);
4330 }
4331
4332 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4333 size_t *acl_len)
4334 {
4335 __be32 *savep;
4336 uint32_t attrlen,
4337 bitmap[2] = {0};
4338 struct kvec *iov = req->rq_rcv_buf.head;
4339 int status;
4340
4341 *acl_len = 0;
4342 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4343 goto out;
4344 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4345 goto out;
4346 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4347 goto out;
4348
4349 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4350 return -EIO;
4351 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4352 size_t hdrlen;
4353 u32 recvd;
4354
4355 /* We ignore &savep and don't do consistency checks on
4356 * the attr length. Let userspace figure it out.... */
4357 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4358 recvd = req->rq_rcv_buf.len - hdrlen;
4359 if (attrlen > recvd) {
4360 dprintk("NFS: server cheating in getattr"
4361 " acl reply: attrlen %u > recvd %u\n",
4362 attrlen, recvd);
4363 return -EINVAL;
4364 }
4365 xdr_read_pages(xdr, attrlen);
4366 *acl_len = attrlen;
4367 } else
4368 status = -EOPNOTSUPP;
4369
4370 out:
4371 return status;
4372 }
4373
4374 static int
4375 decode_savefh(struct xdr_stream *xdr)
4376 {
4377 return decode_op_hdr(xdr, OP_SAVEFH);
4378 }
4379
4380 static int decode_setattr(struct xdr_stream *xdr)
4381 {
4382 __be32 *p;
4383 uint32_t bmlen;
4384 int status;
4385
4386 status = decode_op_hdr(xdr, OP_SETATTR);
4387 if (status)
4388 return status;
4389 p = xdr_inline_decode(xdr, 4);
4390 if (unlikely(!p))
4391 goto out_overflow;
4392 bmlen = be32_to_cpup(p);
4393 p = xdr_inline_decode(xdr, bmlen << 2);
4394 if (likely(p))
4395 return 0;
4396 out_overflow:
4397 print_overflow_msg(__func__, xdr);
4398 return -EIO;
4399 }
4400
4401 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4402 {
4403 __be32 *p;
4404 uint32_t opnum;
4405 int32_t nfserr;
4406
4407 p = xdr_inline_decode(xdr, 8);
4408 if (unlikely(!p))
4409 goto out_overflow;
4410 opnum = be32_to_cpup(p++);
4411 if (opnum != OP_SETCLIENTID) {
4412 dprintk("nfs: decode_setclientid: Server returned operation"
4413 " %d\n", opnum);
4414 return -EIO;
4415 }
4416 nfserr = be32_to_cpup(p);
4417 if (nfserr == NFS_OK) {
4418 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4419 if (unlikely(!p))
4420 goto out_overflow;
4421 p = xdr_decode_hyper(p, &clp->cl_clientid);
4422 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4423 } else if (nfserr == NFSERR_CLID_INUSE) {
4424 uint32_t len;
4425
4426 /* skip netid string */
4427 p = xdr_inline_decode(xdr, 4);
4428 if (unlikely(!p))
4429 goto out_overflow;
4430 len = be32_to_cpup(p);
4431 p = xdr_inline_decode(xdr, len);
4432 if (unlikely(!p))
4433 goto out_overflow;
4434
4435 /* skip uaddr string */
4436 p = xdr_inline_decode(xdr, 4);
4437 if (unlikely(!p))
4438 goto out_overflow;
4439 len = be32_to_cpup(p);
4440 p = xdr_inline_decode(xdr, len);
4441 if (unlikely(!p))
4442 goto out_overflow;
4443 return -NFSERR_CLID_INUSE;
4444 } else
4445 return nfs4_stat_to_errno(nfserr);
4446
4447 return 0;
4448 out_overflow:
4449 print_overflow_msg(__func__, xdr);
4450 return -EIO;
4451 }
4452
4453 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4454 {
4455 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4456 }
4457
4458 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4459 {
4460 __be32 *p;
4461 int status;
4462
4463 status = decode_op_hdr(xdr, OP_WRITE);
4464 if (status)
4465 return status;
4466
4467 p = xdr_inline_decode(xdr, 16);
4468 if (unlikely(!p))
4469 goto out_overflow;
4470 res->count = be32_to_cpup(p++);
4471 res->verf->committed = be32_to_cpup(p++);
4472 memcpy(res->verf->verifier, p, 8);
4473 return 0;
4474 out_overflow:
4475 print_overflow_msg(__func__, xdr);
4476 return -EIO;
4477 }
4478
4479 static int decode_delegreturn(struct xdr_stream *xdr)
4480 {
4481 return decode_op_hdr(xdr, OP_DELEGRETURN);
4482 }
4483
4484 #if defined(CONFIG_NFS_V4_1)
4485 static int decode_exchange_id(struct xdr_stream *xdr,
4486 struct nfs41_exchange_id_res *res)
4487 {
4488 __be32 *p;
4489 uint32_t dummy;
4490 char *dummy_str;
4491 int status;
4492 struct nfs_client *clp = res->client;
4493
4494 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4495 if (status)
4496 return status;
4497
4498 p = xdr_inline_decode(xdr, 8);
4499 if (unlikely(!p))
4500 goto out_overflow;
4501 xdr_decode_hyper(p, &clp->cl_ex_clid);
4502 p = xdr_inline_decode(xdr, 12);
4503 if (unlikely(!p))
4504 goto out_overflow;
4505 clp->cl_seqid = be32_to_cpup(p++);
4506 clp->cl_exchange_flags = be32_to_cpup(p++);
4507
4508 /* We ask for SP4_NONE */
4509 dummy = be32_to_cpup(p);
4510 if (dummy != SP4_NONE)
4511 return -EIO;
4512
4513 /* Throw away minor_id */
4514 p = xdr_inline_decode(xdr, 8);
4515 if (unlikely(!p))
4516 goto out_overflow;
4517
4518 /* Throw away Major id */
4519 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4520 if (unlikely(status))
4521 return status;
4522
4523 /* Throw away server_scope */
4524 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4525 if (unlikely(status))
4526 return status;
4527
4528 /* Throw away Implementation id array */
4529 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4530 if (unlikely(status))
4531 return status;
4532
4533 return 0;
4534 out_overflow:
4535 print_overflow_msg(__func__, xdr);
4536 return -EIO;
4537 }
4538
4539 static int decode_chan_attrs(struct xdr_stream *xdr,
4540 struct nfs4_channel_attrs *attrs)
4541 {
4542 __be32 *p;
4543 u32 nr_attrs;
4544
4545 p = xdr_inline_decode(xdr, 28);
4546 if (unlikely(!p))
4547 goto out_overflow;
4548 attrs->headerpadsz = be32_to_cpup(p++);
4549 attrs->max_rqst_sz = be32_to_cpup(p++);
4550 attrs->max_resp_sz = be32_to_cpup(p++);
4551 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4552 attrs->max_ops = be32_to_cpup(p++);
4553 attrs->max_reqs = be32_to_cpup(p++);
4554 nr_attrs = be32_to_cpup(p);
4555 if (unlikely(nr_attrs > 1)) {
4556 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4557 __func__, nr_attrs);
4558 return -EINVAL;
4559 }
4560 if (nr_attrs == 1) {
4561 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4562 if (unlikely(!p))
4563 goto out_overflow;
4564 }
4565 return 0;
4566 out_overflow:
4567 print_overflow_msg(__func__, xdr);
4568 return -EIO;
4569 }
4570
4571 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4572 {
4573 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4574 }
4575
4576 static int decode_create_session(struct xdr_stream *xdr,
4577 struct nfs41_create_session_res *res)
4578 {
4579 __be32 *p;
4580 int status;
4581 struct nfs_client *clp = res->client;
4582 struct nfs4_session *session = clp->cl_session;
4583
4584 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4585 if (!status)
4586 status = decode_sessionid(xdr, &session->sess_id);
4587 if (unlikely(status))
4588 return status;
4589
4590 /* seqid, flags */
4591 p = xdr_inline_decode(xdr, 8);
4592 if (unlikely(!p))
4593 goto out_overflow;
4594 clp->cl_seqid = be32_to_cpup(p++);
4595 session->flags = be32_to_cpup(p);
4596
4597 /* Channel attributes */
4598 status = decode_chan_attrs(xdr, &session->fc_attrs);
4599 if (!status)
4600 status = decode_chan_attrs(xdr, &session->bc_attrs);
4601 return status;
4602 out_overflow:
4603 print_overflow_msg(__func__, xdr);
4604 return -EIO;
4605 }
4606
4607 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4608 {
4609 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4610 }
4611
4612 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4613 {
4614 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4615 }
4616 #endif /* CONFIG_NFS_V4_1 */
4617
4618 static int decode_sequence(struct xdr_stream *xdr,
4619 struct nfs4_sequence_res *res,
4620 struct rpc_rqst *rqstp)
4621 {
4622 #if defined(CONFIG_NFS_V4_1)
4623 struct nfs4_slot *slot;
4624 struct nfs4_sessionid id;
4625 u32 dummy;
4626 int status;
4627 __be32 *p;
4628
4629 if (!res->sr_session)
4630 return 0;
4631
4632 status = decode_op_hdr(xdr, OP_SEQUENCE);
4633 if (!status)
4634 status = decode_sessionid(xdr, &id);
4635 if (unlikely(status))
4636 goto out_err;
4637
4638 /*
4639 * If the server returns different values for sessionID, slotID or
4640 * sequence number, the server is looney tunes.
4641 */
4642 status = -EREMOTEIO;
4643
4644 if (memcmp(id.data, res->sr_session->sess_id.data,
4645 NFS4_MAX_SESSIONID_LEN)) {
4646 dprintk("%s Invalid session id\n", __func__);
4647 goto out_err;
4648 }
4649
4650 p = xdr_inline_decode(xdr, 20);
4651 if (unlikely(!p))
4652 goto out_overflow;
4653
4654 /* seqid */
4655 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4656 dummy = be32_to_cpup(p++);
4657 if (dummy != slot->seq_nr) {
4658 dprintk("%s Invalid sequence number\n", __func__);
4659 goto out_err;
4660 }
4661 /* slot id */
4662 dummy = be32_to_cpup(p++);
4663 if (dummy != res->sr_slotid) {
4664 dprintk("%s Invalid slot id\n", __func__);
4665 goto out_err;
4666 }
4667 /* highest slot id - currently not processed */
4668 dummy = be32_to_cpup(p++);
4669 /* target highest slot id - currently not processed */
4670 dummy = be32_to_cpup(p++);
4671 /* result flags */
4672 res->sr_status_flags = be32_to_cpup(p);
4673 status = 0;
4674 out_err:
4675 res->sr_status = status;
4676 return status;
4677 out_overflow:
4678 print_overflow_msg(__func__, xdr);
4679 status = -EIO;
4680 goto out_err;
4681 #else /* CONFIG_NFS_V4_1 */
4682 return 0;
4683 #endif /* CONFIG_NFS_V4_1 */
4684 }
4685
4686 /*
4687 * END OF "GENERIC" DECODE ROUTINES.
4688 */
4689
4690 /*
4691 * Decode OPEN_DOWNGRADE response
4692 */
4693 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4694 {
4695 struct xdr_stream xdr;
4696 struct compound_hdr hdr;
4697 int status;
4698
4699 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4700 status = decode_compound_hdr(&xdr, &hdr);
4701 if (status)
4702 goto out;
4703 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4704 if (status)
4705 goto out;
4706 status = decode_putfh(&xdr);
4707 if (status)
4708 goto out;
4709 status = decode_open_downgrade(&xdr, res);
4710 if (status != 0)
4711 goto out;
4712 decode_getfattr(&xdr, res->fattr, res->server,
4713 !RPC_IS_ASYNC(rqstp->rq_task));
4714 out:
4715 return status;
4716 }
4717
4718 /*
4719 * Decode ACCESS response
4720 */
4721 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4722 {
4723 struct xdr_stream xdr;
4724 struct compound_hdr hdr;
4725 int status;
4726
4727 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4728 status = decode_compound_hdr(&xdr, &hdr);
4729 if (status)
4730 goto out;
4731 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4732 if (status)
4733 goto out;
4734 status = decode_putfh(&xdr);
4735 if (status != 0)
4736 goto out;
4737 status = decode_access(&xdr, res);
4738 if (status != 0)
4739 goto out;
4740 decode_getfattr(&xdr, res->fattr, res->server,
4741 !RPC_IS_ASYNC(rqstp->rq_task));
4742 out:
4743 return status;
4744 }
4745
4746 /*
4747 * Decode LOOKUP response
4748 */
4749 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4750 {
4751 struct xdr_stream xdr;
4752 struct compound_hdr hdr;
4753 int status;
4754
4755 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4756 status = decode_compound_hdr(&xdr, &hdr);
4757 if (status)
4758 goto out;
4759 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4760 if (status)
4761 goto out;
4762 if ((status = decode_putfh(&xdr)) != 0)
4763 goto out;
4764 if ((status = decode_lookup(&xdr)) != 0)
4765 goto out;
4766 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4767 goto out;
4768 status = decode_getfattr(&xdr, res->fattr, res->server
4769 ,!RPC_IS_ASYNC(rqstp->rq_task));
4770 out:
4771 return status;
4772 }
4773
4774 /*
4775 * Decode LOOKUP_ROOT response
4776 */
4777 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4778 {
4779 struct xdr_stream xdr;
4780 struct compound_hdr hdr;
4781 int status;
4782
4783 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4784 status = decode_compound_hdr(&xdr, &hdr);
4785 if (status)
4786 goto out;
4787 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4788 if (status)
4789 goto out;
4790 if ((status = decode_putrootfh(&xdr)) != 0)
4791 goto out;
4792 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4793 status = decode_getfattr(&xdr, res->fattr, res->server,
4794 !RPC_IS_ASYNC(rqstp->rq_task));
4795 out:
4796 return status;
4797 }
4798
4799 /*
4800 * Decode REMOVE response
4801 */
4802 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4803 {
4804 struct xdr_stream xdr;
4805 struct compound_hdr hdr;
4806 int status;
4807
4808 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4809 status = decode_compound_hdr(&xdr, &hdr);
4810 if (status)
4811 goto out;
4812 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4813 if (status)
4814 goto out;
4815 if ((status = decode_putfh(&xdr)) != 0)
4816 goto out;
4817 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4818 goto out;
4819 decode_getfattr(&xdr, &res->dir_attr, res->server,
4820 !RPC_IS_ASYNC(rqstp->rq_task));
4821 out:
4822 return status;
4823 }
4824
4825 /*
4826 * Decode RENAME response
4827 */
4828 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4829 {
4830 struct xdr_stream xdr;
4831 struct compound_hdr hdr;
4832 int status;
4833
4834 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4835 status = decode_compound_hdr(&xdr, &hdr);
4836 if (status)
4837 goto out;
4838 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4839 if (status)
4840 goto out;
4841 if ((status = decode_putfh(&xdr)) != 0)
4842 goto out;
4843 if ((status = decode_savefh(&xdr)) != 0)
4844 goto out;
4845 if ((status = decode_putfh(&xdr)) != 0)
4846 goto out;
4847 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4848 goto out;
4849 /* Current FH is target directory */
4850 if (decode_getfattr(&xdr, res->new_fattr, res->server,
4851 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4852 goto out;
4853 if ((status = decode_restorefh(&xdr)) != 0)
4854 goto out;
4855 decode_getfattr(&xdr, res->old_fattr, res->server,
4856 !RPC_IS_ASYNC(rqstp->rq_task));
4857 out:
4858 return status;
4859 }
4860
4861 /*
4862 * Decode LINK response
4863 */
4864 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4865 {
4866 struct xdr_stream xdr;
4867 struct compound_hdr hdr;
4868 int status;
4869
4870 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4871 status = decode_compound_hdr(&xdr, &hdr);
4872 if (status)
4873 goto out;
4874 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4875 if (status)
4876 goto out;
4877 if ((status = decode_putfh(&xdr)) != 0)
4878 goto out;
4879 if ((status = decode_savefh(&xdr)) != 0)
4880 goto out;
4881 if ((status = decode_putfh(&xdr)) != 0)
4882 goto out;
4883 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4884 goto out;
4885 /*
4886 * Note order: OP_LINK leaves the directory as the current
4887 * filehandle.
4888 */
4889 if (decode_getfattr(&xdr, res->dir_attr, res->server,
4890 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4891 goto out;
4892 if ((status = decode_restorefh(&xdr)) != 0)
4893 goto out;
4894 decode_getfattr(&xdr, res->fattr, res->server,
4895 !RPC_IS_ASYNC(rqstp->rq_task));
4896 out:
4897 return status;
4898 }
4899
4900 /*
4901 * Decode CREATE response
4902 */
4903 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4904 {
4905 struct xdr_stream xdr;
4906 struct compound_hdr hdr;
4907 int status;
4908
4909 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4910 status = decode_compound_hdr(&xdr, &hdr);
4911 if (status)
4912 goto out;
4913 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4914 if (status)
4915 goto out;
4916 if ((status = decode_putfh(&xdr)) != 0)
4917 goto out;
4918 if ((status = decode_savefh(&xdr)) != 0)
4919 goto out;
4920 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4921 goto out;
4922 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4923 goto out;
4924 if (decode_getfattr(&xdr, res->fattr, res->server,
4925 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4926 goto out;
4927 if ((status = decode_restorefh(&xdr)) != 0)
4928 goto out;
4929 decode_getfattr(&xdr, res->dir_fattr, res->server,
4930 !RPC_IS_ASYNC(rqstp->rq_task));
4931 out:
4932 return status;
4933 }
4934
4935 /*
4936 * Decode SYMLINK response
4937 */
4938 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4939 {
4940 return nfs4_xdr_dec_create(rqstp, p, res);
4941 }
4942
4943 /*
4944 * Decode GETATTR response
4945 */
4946 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4947 {
4948 struct xdr_stream xdr;
4949 struct compound_hdr hdr;
4950 int status;
4951
4952 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4953 status = decode_compound_hdr(&xdr, &hdr);
4954 if (status)
4955 goto out;
4956 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4957 if (status)
4958 goto out;
4959 status = decode_putfh(&xdr);
4960 if (status)
4961 goto out;
4962 status = decode_getfattr(&xdr, res->fattr, res->server,
4963 !RPC_IS_ASYNC(rqstp->rq_task));
4964 out:
4965 return status;
4966 }
4967
4968 /*
4969 * Encode an SETACL request
4970 */
4971 static int
4972 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4973 {
4974 struct xdr_stream xdr;
4975 struct compound_hdr hdr = {
4976 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4977 };
4978 int status;
4979
4980 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4981 encode_compound_hdr(&xdr, req, &hdr);
4982 encode_sequence(&xdr, &args->seq_args, &hdr);
4983 encode_putfh(&xdr, args->fh, &hdr);
4984 status = encode_setacl(&xdr, args, &hdr);
4985 encode_nops(&hdr);
4986 return status;
4987 }
4988
4989 /*
4990 * Decode SETACL response
4991 */
4992 static int
4993 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4994 struct nfs_setaclres *res)
4995 {
4996 struct xdr_stream xdr;
4997 struct compound_hdr hdr;
4998 int status;
4999
5000 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5001 status = decode_compound_hdr(&xdr, &hdr);
5002 if (status)
5003 goto out;
5004 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5005 if (status)
5006 goto out;
5007 status = decode_putfh(&xdr);
5008 if (status)
5009 goto out;
5010 status = decode_setattr(&xdr);
5011 out:
5012 return status;
5013 }
5014
5015 /*
5016 * Decode GETACL response
5017 */
5018 static int
5019 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5020 struct nfs_getaclres *res)
5021 {
5022 struct xdr_stream xdr;
5023 struct compound_hdr hdr;
5024 int status;
5025
5026 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5027 status = decode_compound_hdr(&xdr, &hdr);
5028 if (status)
5029 goto out;
5030 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5031 if (status)
5032 goto out;
5033 status = decode_putfh(&xdr);
5034 if (status)
5035 goto out;
5036 status = decode_getacl(&xdr, rqstp, &res->acl_len);
5037
5038 out:
5039 return status;
5040 }
5041
5042 /*
5043 * Decode CLOSE response
5044 */
5045 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5046 {
5047 struct xdr_stream xdr;
5048 struct compound_hdr hdr;
5049 int status;
5050
5051 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5052 status = decode_compound_hdr(&xdr, &hdr);
5053 if (status)
5054 goto out;
5055 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5056 if (status)
5057 goto out;
5058 status = decode_putfh(&xdr);
5059 if (status)
5060 goto out;
5061 status = decode_close(&xdr, res);
5062 if (status != 0)
5063 goto out;
5064 /*
5065 * Note: Server may do delete on close for this file
5066 * in which case the getattr call will fail with
5067 * an ESTALE error. Shouldn't be a problem,
5068 * though, since fattr->valid will remain unset.
5069 */
5070 decode_getfattr(&xdr, res->fattr, res->server,
5071 !RPC_IS_ASYNC(rqstp->rq_task));
5072 out:
5073 return status;
5074 }
5075
5076 /*
5077 * Decode OPEN response
5078 */
5079 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5080 {
5081 struct xdr_stream xdr;
5082 struct compound_hdr hdr;
5083 int status;
5084
5085 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5086 status = decode_compound_hdr(&xdr, &hdr);
5087 if (status)
5088 goto out;
5089 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5090 if (status)
5091 goto out;
5092 status = decode_putfh(&xdr);
5093 if (status)
5094 goto out;
5095 status = decode_savefh(&xdr);
5096 if (status)
5097 goto out;
5098 status = decode_open(&xdr, res);
5099 if (status)
5100 goto out;
5101 if (decode_getfh(&xdr, &res->fh) != 0)
5102 goto out;
5103 if (decode_getfattr(&xdr, res->f_attr, res->server,
5104 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5105 goto out;
5106 if (decode_restorefh(&xdr) != 0)
5107 goto out;
5108 decode_getfattr(&xdr, res->dir_attr, res->server,
5109 !RPC_IS_ASYNC(rqstp->rq_task));
5110 out:
5111 return status;
5112 }
5113
5114 /*
5115 * Decode OPEN_CONFIRM response
5116 */
5117 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5118 {
5119 struct xdr_stream xdr;
5120 struct compound_hdr hdr;
5121 int status;
5122
5123 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5124 status = decode_compound_hdr(&xdr, &hdr);
5125 if (status)
5126 goto out;
5127 status = decode_putfh(&xdr);
5128 if (status)
5129 goto out;
5130 status = decode_open_confirm(&xdr, res);
5131 out:
5132 return status;
5133 }
5134
5135 /*
5136 * Decode OPEN response
5137 */
5138 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5139 {
5140 struct xdr_stream xdr;
5141 struct compound_hdr hdr;
5142 int status;
5143
5144 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5145 status = decode_compound_hdr(&xdr, &hdr);
5146 if (status)
5147 goto out;
5148 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5149 if (status)
5150 goto out;
5151 status = decode_putfh(&xdr);
5152 if (status)
5153 goto out;
5154 status = decode_open(&xdr, res);
5155 if (status)
5156 goto out;
5157 decode_getfattr(&xdr, res->f_attr, res->server,
5158 !RPC_IS_ASYNC(rqstp->rq_task));
5159 out:
5160 return status;
5161 }
5162
5163 /*
5164 * Decode SETATTR response
5165 */
5166 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5167 {
5168 struct xdr_stream xdr;
5169 struct compound_hdr hdr;
5170 int status;
5171
5172 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5173 status = decode_compound_hdr(&xdr, &hdr);
5174 if (status)
5175 goto out;
5176 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5177 if (status)
5178 goto out;
5179 status = decode_putfh(&xdr);
5180 if (status)
5181 goto out;
5182 status = decode_setattr(&xdr);
5183 if (status)
5184 goto out;
5185 decode_getfattr(&xdr, res->fattr, res->server,
5186 !RPC_IS_ASYNC(rqstp->rq_task));
5187 out:
5188 return status;
5189 }
5190
5191 /*
5192 * Decode LOCK response
5193 */
5194 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5195 {
5196 struct xdr_stream xdr;
5197 struct compound_hdr hdr;
5198 int status;
5199
5200 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5201 status = decode_compound_hdr(&xdr, &hdr);
5202 if (status)
5203 goto out;
5204 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5205 if (status)
5206 goto out;
5207 status = decode_putfh(&xdr);
5208 if (status)
5209 goto out;
5210 status = decode_lock(&xdr, res);
5211 out:
5212 return status;
5213 }
5214
5215 /*
5216 * Decode LOCKT response
5217 */
5218 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5219 {
5220 struct xdr_stream xdr;
5221 struct compound_hdr hdr;
5222 int status;
5223
5224 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5225 status = decode_compound_hdr(&xdr, &hdr);
5226 if (status)
5227 goto out;
5228 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5229 if (status)
5230 goto out;
5231 status = decode_putfh(&xdr);
5232 if (status)
5233 goto out;
5234 status = decode_lockt(&xdr, res);
5235 out:
5236 return status;
5237 }
5238
5239 /*
5240 * Decode LOCKU response
5241 */
5242 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5243 {
5244 struct xdr_stream xdr;
5245 struct compound_hdr hdr;
5246 int status;
5247
5248 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5249 status = decode_compound_hdr(&xdr, &hdr);
5250 if (status)
5251 goto out;
5252 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5253 if (status)
5254 goto out;
5255 status = decode_putfh(&xdr);
5256 if (status)
5257 goto out;
5258 status = decode_locku(&xdr, res);
5259 out:
5260 return status;
5261 }
5262
5263 /*
5264 * Decode READLINK response
5265 */
5266 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5267 struct nfs4_readlink_res *res)
5268 {
5269 struct xdr_stream xdr;
5270 struct compound_hdr hdr;
5271 int status;
5272
5273 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5274 status = decode_compound_hdr(&xdr, &hdr);
5275 if (status)
5276 goto out;
5277 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5278 if (status)
5279 goto out;
5280 status = decode_putfh(&xdr);
5281 if (status)
5282 goto out;
5283 status = decode_readlink(&xdr, rqstp);
5284 out:
5285 return status;
5286 }
5287
5288 /*
5289 * Decode READDIR response
5290 */
5291 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5292 {
5293 struct xdr_stream xdr;
5294 struct compound_hdr hdr;
5295 int status;
5296
5297 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5298 status = decode_compound_hdr(&xdr, &hdr);
5299 if (status)
5300 goto out;
5301 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5302 if (status)
5303 goto out;
5304 status = decode_putfh(&xdr);
5305 if (status)
5306 goto out;
5307 status = decode_readdir(&xdr, rqstp, res);
5308 out:
5309 return status;
5310 }
5311
5312 /*
5313 * Decode Read response
5314 */
5315 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5316 {
5317 struct xdr_stream xdr;
5318 struct compound_hdr hdr;
5319 int status;
5320
5321 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5322 status = decode_compound_hdr(&xdr, &hdr);
5323 if (status)
5324 goto out;
5325 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5326 if (status)
5327 goto out;
5328 status = decode_putfh(&xdr);
5329 if (status)
5330 goto out;
5331 status = decode_read(&xdr, rqstp, res);
5332 if (!status)
5333 status = res->count;
5334 out:
5335 return status;
5336 }
5337
5338 /*
5339 * Decode WRITE response
5340 */
5341 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5342 {
5343 struct xdr_stream xdr;
5344 struct compound_hdr hdr;
5345 int status;
5346
5347 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5348 status = decode_compound_hdr(&xdr, &hdr);
5349 if (status)
5350 goto out;
5351 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5352 if (status)
5353 goto out;
5354 status = decode_putfh(&xdr);
5355 if (status)
5356 goto out;
5357 status = decode_write(&xdr, res);
5358 if (status)
5359 goto out;
5360 decode_getfattr(&xdr, res->fattr, res->server,
5361 !RPC_IS_ASYNC(rqstp->rq_task));
5362 if (!status)
5363 status = res->count;
5364 out:
5365 return status;
5366 }
5367
5368 /*
5369 * Decode COMMIT response
5370 */
5371 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5372 {
5373 struct xdr_stream xdr;
5374 struct compound_hdr hdr;
5375 int status;
5376
5377 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5378 status = decode_compound_hdr(&xdr, &hdr);
5379 if (status)
5380 goto out;
5381 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5382 if (status)
5383 goto out;
5384 status = decode_putfh(&xdr);
5385 if (status)
5386 goto out;
5387 status = decode_commit(&xdr, res);
5388 if (status)
5389 goto out;
5390 decode_getfattr(&xdr, res->fattr, res->server,
5391 !RPC_IS_ASYNC(rqstp->rq_task));
5392 out:
5393 return status;
5394 }
5395
5396 /*
5397 * Decode FSINFO response
5398 */
5399 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5400 struct nfs4_fsinfo_res *res)
5401 {
5402 struct xdr_stream xdr;
5403 struct compound_hdr hdr;
5404 int status;
5405
5406 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5407 status = decode_compound_hdr(&xdr, &hdr);
5408 if (!status)
5409 status = decode_sequence(&xdr, &res->seq_res, req);
5410 if (!status)
5411 status = decode_putfh(&xdr);
5412 if (!status)
5413 status = decode_fsinfo(&xdr, res->fsinfo);
5414 return status;
5415 }
5416
5417 /*
5418 * Decode PATHCONF response
5419 */
5420 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5421 struct nfs4_pathconf_res *res)
5422 {
5423 struct xdr_stream xdr;
5424 struct compound_hdr hdr;
5425 int status;
5426
5427 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5428 status = decode_compound_hdr(&xdr, &hdr);
5429 if (!status)
5430 status = decode_sequence(&xdr, &res->seq_res, req);
5431 if (!status)
5432 status = decode_putfh(&xdr);
5433 if (!status)
5434 status = decode_pathconf(&xdr, res->pathconf);
5435 return status;
5436 }
5437
5438 /*
5439 * Decode STATFS response
5440 */
5441 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5442 struct nfs4_statfs_res *res)
5443 {
5444 struct xdr_stream xdr;
5445 struct compound_hdr hdr;
5446 int status;
5447
5448 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5449 status = decode_compound_hdr(&xdr, &hdr);
5450 if (!status)
5451 status = decode_sequence(&xdr, &res->seq_res, req);
5452 if (!status)
5453 status = decode_putfh(&xdr);
5454 if (!status)
5455 status = decode_statfs(&xdr, res->fsstat);
5456 return status;
5457 }
5458
5459 /*
5460 * Decode GETATTR_BITMAP response
5461 */
5462 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5463 {
5464 struct xdr_stream xdr;
5465 struct compound_hdr hdr;
5466 int status;
5467
5468 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5469 status = decode_compound_hdr(&xdr, &hdr);
5470 if (status)
5471 goto out;
5472 status = decode_sequence(&xdr, &res->seq_res, req);
5473 if (status)
5474 goto out;
5475 if ((status = decode_putfh(&xdr)) != 0)
5476 goto out;
5477 status = decode_server_caps(&xdr, res);
5478 out:
5479 return status;
5480 }
5481
5482 /*
5483 * Decode RENEW response
5484 */
5485 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5486 {
5487 struct xdr_stream xdr;
5488 struct compound_hdr hdr;
5489 int status;
5490
5491 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5492 status = decode_compound_hdr(&xdr, &hdr);
5493 if (!status)
5494 status = decode_renew(&xdr);
5495 return status;
5496 }
5497
5498 /*
5499 * Decode SETCLIENTID response
5500 */
5501 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5502 struct nfs_client *clp)
5503 {
5504 struct xdr_stream xdr;
5505 struct compound_hdr hdr;
5506 int status;
5507
5508 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5509 status = decode_compound_hdr(&xdr, &hdr);
5510 if (!status)
5511 status = decode_setclientid(&xdr, clp);
5512 return status;
5513 }
5514
5515 /*
5516 * Decode SETCLIENTID_CONFIRM response
5517 */
5518 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5519 {
5520 struct xdr_stream xdr;
5521 struct compound_hdr hdr;
5522 int status;
5523
5524 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5525 status = decode_compound_hdr(&xdr, &hdr);
5526 if (!status)
5527 status = decode_setclientid_confirm(&xdr);
5528 if (!status)
5529 status = decode_putrootfh(&xdr);
5530 if (!status)
5531 status = decode_fsinfo(&xdr, fsinfo);
5532 return status;
5533 }
5534
5535 /*
5536 * Decode DELEGRETURN response
5537 */
5538 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5539 {
5540 struct xdr_stream xdr;
5541 struct compound_hdr hdr;
5542 int status;
5543
5544 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5545 status = decode_compound_hdr(&xdr, &hdr);
5546 if (status)
5547 goto out;
5548 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5549 if (status)
5550 goto out;
5551 status = decode_putfh(&xdr);
5552 if (status != 0)
5553 goto out;
5554 status = decode_delegreturn(&xdr);
5555 decode_getfattr(&xdr, res->fattr, res->server,
5556 !RPC_IS_ASYNC(rqstp->rq_task));
5557 out:
5558 return status;
5559 }
5560
5561 /*
5562 * Decode FS_LOCATIONS response
5563 */
5564 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5565 struct nfs4_fs_locations_res *res)
5566 {
5567 struct xdr_stream xdr;
5568 struct compound_hdr hdr;
5569 int status;
5570
5571 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5572 status = decode_compound_hdr(&xdr, &hdr);
5573 if (status)
5574 goto out;
5575 status = decode_sequence(&xdr, &res->seq_res, req);
5576 if (status)
5577 goto out;
5578 if ((status = decode_putfh(&xdr)) != 0)
5579 goto out;
5580 if ((status = decode_lookup(&xdr)) != 0)
5581 goto out;
5582 xdr_enter_page(&xdr, PAGE_SIZE);
5583 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5584 res->fs_locations->server,
5585 !RPC_IS_ASYNC(req->rq_task));
5586 out:
5587 return status;
5588 }
5589
5590 #if defined(CONFIG_NFS_V4_1)
5591 /*
5592 * Decode EXCHANGE_ID response
5593 */
5594 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5595 void *res)
5596 {
5597 struct xdr_stream xdr;
5598 struct compound_hdr hdr;
5599 int status;
5600
5601 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5602 status = decode_compound_hdr(&xdr, &hdr);
5603 if (!status)
5604 status = decode_exchange_id(&xdr, res);
5605 return status;
5606 }
5607
5608 /*
5609 * Decode CREATE_SESSION response
5610 */
5611 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5612 struct nfs41_create_session_res *res)
5613 {
5614 struct xdr_stream xdr;
5615 struct compound_hdr hdr;
5616 int status;
5617
5618 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5619 status = decode_compound_hdr(&xdr, &hdr);
5620 if (!status)
5621 status = decode_create_session(&xdr, res);
5622 return status;
5623 }
5624
5625 /*
5626 * Decode DESTROY_SESSION response
5627 */
5628 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5629 void *dummy)
5630 {
5631 struct xdr_stream xdr;
5632 struct compound_hdr hdr;
5633 int status;
5634
5635 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5636 status = decode_compound_hdr(&xdr, &hdr);
5637 if (!status)
5638 status = decode_destroy_session(&xdr, dummy);
5639 return status;
5640 }
5641
5642 /*
5643 * Decode SEQUENCE response
5644 */
5645 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5646 struct nfs4_sequence_res *res)
5647 {
5648 struct xdr_stream xdr;
5649 struct compound_hdr hdr;
5650 int status;
5651
5652 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5653 status = decode_compound_hdr(&xdr, &hdr);
5654 if (!status)
5655 status = decode_sequence(&xdr, res, rqstp);
5656 return status;
5657 }
5658
5659 /*
5660 * Decode GET_LEASE_TIME response
5661 */
5662 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5663 struct nfs4_get_lease_time_res *res)
5664 {
5665 struct xdr_stream xdr;
5666 struct compound_hdr hdr;
5667 int status;
5668
5669 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5670 status = decode_compound_hdr(&xdr, &hdr);
5671 if (!status)
5672 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5673 if (!status)
5674 status = decode_putrootfh(&xdr);
5675 if (!status)
5676 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5677 return status;
5678 }
5679
5680 /*
5681 * Decode RECLAIM_COMPLETE response
5682 */
5683 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5684 struct nfs41_reclaim_complete_res *res)
5685 {
5686 struct xdr_stream xdr;
5687 struct compound_hdr hdr;
5688 int status;
5689
5690 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5691 status = decode_compound_hdr(&xdr, &hdr);
5692 if (!status)
5693 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5694 if (!status)
5695 status = decode_reclaim_complete(&xdr, (void *)NULL);
5696 return status;
5697 }
5698 #endif /* CONFIG_NFS_V4_1 */
5699
5700 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5701 {
5702 uint32_t bitmap[2] = {0};
5703 uint32_t len;
5704
5705 if (!*p++) {
5706 if (!*p)
5707 return ERR_PTR(-EAGAIN);
5708 entry->eof = 1;
5709 return ERR_PTR(-EBADCOOKIE);
5710 }
5711
5712 entry->prev_cookie = entry->cookie;
5713 p = xdr_decode_hyper(p, &entry->cookie);
5714 entry->len = ntohl(*p++);
5715 entry->name = (const char *) p;
5716 p += XDR_QUADLEN(entry->len);
5717
5718 /*
5719 * In case the server doesn't return an inode number,
5720 * we fake one here. (We don't use inode number 0,
5721 * since glibc seems to choke on it...)
5722 */
5723 entry->ino = 1;
5724
5725 len = ntohl(*p++); /* bitmap length */
5726 if (len-- > 0) {
5727 bitmap[0] = ntohl(*p++);
5728 if (len-- > 0) {
5729 bitmap[1] = ntohl(*p++);
5730 p += len;
5731 }
5732 }
5733 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5734 if (len > 0) {
5735 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5736 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5737 /* Ignore the return value of rdattr_error for now */
5738 p++;
5739 len--;
5740 }
5741 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5742 xdr_decode_hyper(p, &entry->ino);
5743 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5744 xdr_decode_hyper(p, &entry->ino);
5745 p += len;
5746 }
5747
5748 entry->eof = !p[0] && p[1];
5749 return p;
5750 }
5751
5752 /*
5753 * We need to translate between nfs status return values and
5754 * the local errno values which may not be the same.
5755 */
5756 static struct {
5757 int stat;
5758 int errno;
5759 } nfs_errtbl[] = {
5760 { NFS4_OK, 0 },
5761 { NFS4ERR_PERM, -EPERM },
5762 { NFS4ERR_NOENT, -ENOENT },
5763 { NFS4ERR_IO, -errno_NFSERR_IO},
5764 { NFS4ERR_NXIO, -ENXIO },
5765 { NFS4ERR_ACCESS, -EACCES },
5766 { NFS4ERR_EXIST, -EEXIST },
5767 { NFS4ERR_XDEV, -EXDEV },
5768 { NFS4ERR_NOTDIR, -ENOTDIR },
5769 { NFS4ERR_ISDIR, -EISDIR },
5770 { NFS4ERR_INVAL, -EINVAL },
5771 { NFS4ERR_FBIG, -EFBIG },
5772 { NFS4ERR_NOSPC, -ENOSPC },
5773 { NFS4ERR_ROFS, -EROFS },
5774 { NFS4ERR_MLINK, -EMLINK },
5775 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
5776 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
5777 { NFS4ERR_DQUOT, -EDQUOT },
5778 { NFS4ERR_STALE, -ESTALE },
5779 { NFS4ERR_BADHANDLE, -EBADHANDLE },
5780 { NFS4ERR_BADOWNER, -EINVAL },
5781 { NFS4ERR_BADNAME, -EINVAL },
5782 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
5783 { NFS4ERR_NOTSUPP, -ENOTSUPP },
5784 { NFS4ERR_TOOSMALL, -ETOOSMALL },
5785 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
5786 { NFS4ERR_BADTYPE, -EBADTYPE },
5787 { NFS4ERR_LOCKED, -EAGAIN },
5788 { NFS4ERR_SYMLINK, -ELOOP },
5789 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5790 { NFS4ERR_DEADLOCK, -EDEADLK },
5791 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5792 * to be handled by a
5793 * middle-layer.
5794 */
5795 { -1, -EIO }
5796 };
5797
5798 /*
5799 * Convert an NFS error code to a local one.
5800 * This one is used jointly by NFSv2 and NFSv3.
5801 */
5802 static int
5803 nfs4_stat_to_errno(int stat)
5804 {
5805 int i;
5806 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5807 if (nfs_errtbl[i].stat == stat)
5808 return nfs_errtbl[i].errno;
5809 }
5810 if (stat <= 10000 || stat > 10100) {
5811 /* The server is looney tunes. */
5812 return -EREMOTEIO;
5813 }
5814 /* If we cannot translate the error, the recovery routines should
5815 * handle it.
5816 * Note: remaining NFSv4 error codes have values > 10000, so should
5817 * not conflict with native Linux error codes.
5818 */
5819 return -stat;
5820 }
5821
5822 #define PROC(proc, argtype, restype) \
5823 [NFSPROC4_CLNT_##proc] = { \
5824 .p_proc = NFSPROC4_COMPOUND, \
5825 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5826 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5827 .p_arglen = NFS4_##argtype##_sz, \
5828 .p_replen = NFS4_##restype##_sz, \
5829 .p_statidx = NFSPROC4_CLNT_##proc, \
5830 .p_name = #proc, \
5831 }
5832
5833 struct rpc_procinfo nfs4_procedures[] = {
5834 PROC(READ, enc_read, dec_read),
5835 PROC(WRITE, enc_write, dec_write),
5836 PROC(COMMIT, enc_commit, dec_commit),
5837 PROC(OPEN, enc_open, dec_open),
5838 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5839 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5840 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5841 PROC(CLOSE, enc_close, dec_close),
5842 PROC(SETATTR, enc_setattr, dec_setattr),
5843 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5844 PROC(RENEW, enc_renew, dec_renew),
5845 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5846 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5847 PROC(LOCK, enc_lock, dec_lock),
5848 PROC(LOCKT, enc_lockt, dec_lockt),
5849 PROC(LOCKU, enc_locku, dec_locku),
5850 PROC(ACCESS, enc_access, dec_access),
5851 PROC(GETATTR, enc_getattr, dec_getattr),
5852 PROC(LOOKUP, enc_lookup, dec_lookup),
5853 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5854 PROC(REMOVE, enc_remove, dec_remove),
5855 PROC(RENAME, enc_rename, dec_rename),
5856 PROC(LINK, enc_link, dec_link),
5857 PROC(SYMLINK, enc_symlink, dec_symlink),
5858 PROC(CREATE, enc_create, dec_create),
5859 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5860 PROC(STATFS, enc_statfs, dec_statfs),
5861 PROC(READLINK, enc_readlink, dec_readlink),
5862 PROC(READDIR, enc_readdir, dec_readdir),
5863 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5864 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5865 PROC(GETACL, enc_getacl, dec_getacl),
5866 PROC(SETACL, enc_setacl, dec_setacl),
5867 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5868 #if defined(CONFIG_NFS_V4_1)
5869 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5870 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
5871 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
5872 PROC(SEQUENCE, enc_sequence, dec_sequence),
5873 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
5874 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
5875 #endif /* CONFIG_NFS_V4_1 */
5876 };
5877
5878 struct rpc_version nfs_version4 = {
5879 .number = 4,
5880 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5881 .procs = nfs4_procedures
5882 };
5883
5884 /*
5885 * Local variables:
5886 * c-basic-offset: 8
5887 * End:
5888 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree