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NFSv4: Clean up for lockowner XDR encoding
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfs / nfs4xdr.c
blob49df05afdc646583e568ad6162ba388c62242d4e
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/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/nfs.h>
50 #include <linux/nfs4.h>
51 #include <linux/nfs_fs.h>
52 #include <linux/nfs_idmap.h>
53 #include "nfs4_fs.h"
54 #include "internal.h"
55
56 #define NFSDBG_FACILITY NFSDBG_XDR
57
58 /* Mapping from NFS error code to "errno" error code. */
59 #define errno_NFSERR_IO EIO
60
61 static int nfs4_stat_to_errno(int);
62
63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64 #ifdef DEBUG
65 #define NFS4_MAXTAGLEN 20
66 #else
67 #define NFS4_MAXTAGLEN 0
68 #endif
69
70 /* lock,open owner id:
71 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
72 */
73 #define open_owner_id_maxsz (1 + 4)
74 #define lock_owner_id_maxsz (1 + 4)
75 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
76 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
77 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define op_encode_hdr_maxsz (1)
79 #define op_decode_hdr_maxsz (2)
80 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
81 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
83 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
85 (NFS4_FHSIZE >> 2))
86 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
87 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
88 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
91 ((3+NFS4_FHSIZE) >> 2))
92 #define nfs4_fattr_bitmap_maxsz 3
93 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
94 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
95 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
96 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
97 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 /* This is based on getfattr, which uses the most attributes: */
99 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
100 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
101 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
102 nfs4_fattr_value_maxsz)
103 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
104 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
105 1 + 2 + 1 + \
106 nfs4_owner_maxsz + \
107 nfs4_group_maxsz + \
108 4 + 4)
109 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
110 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
111 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
114 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
115 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
116 #define decode_renew_maxsz (op_decode_hdr_maxsz)
117 #define encode_setclientid_maxsz \
118 (op_encode_hdr_maxsz + \
119 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
120 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
121 1 /* sc_prog */ + \
122 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
123 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
124 1) /* sc_cb_ident */
125 #define decode_setclientid_maxsz \
126 (op_decode_hdr_maxsz + \
127 2 + \
128 1024) /* large value for CLID_INUSE */
129 #define encode_setclientid_confirm_maxsz \
130 (op_encode_hdr_maxsz + \
131 3 + (NFS4_VERIFIER_SIZE >> 2))
132 #define decode_setclientid_confirm_maxsz \
133 (op_decode_hdr_maxsz)
134 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
135 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
136 #define encode_share_access_maxsz \
137 (2)
138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
139 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
141 #define encode_open_maxsz (op_encode_hdr_maxsz + \
142 2 + encode_share_access_maxsz + 2 + \
143 open_owner_id_maxsz + \
144 encode_opentype_maxsz + \
145 encode_claim_null_maxsz)
146 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
148 decode_ace_maxsz)
149 #define decode_change_info_maxsz (5)
150 #define decode_open_maxsz (op_decode_hdr_maxsz + \
151 decode_stateid_maxsz + \
152 decode_change_info_maxsz + 1 + \
153 nfs4_fattr_bitmap_maxsz + \
154 decode_delegation_maxsz)
155 #define encode_open_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 encode_stateid_maxsz + 1)
158 #define decode_open_confirm_maxsz \
159 (op_decode_hdr_maxsz + \
160 decode_stateid_maxsz)
161 #define encode_open_downgrade_maxsz \
162 (op_encode_hdr_maxsz + \
163 encode_stateid_maxsz + 1 + \
164 encode_share_access_maxsz)
165 #define decode_open_downgrade_maxsz \
166 (op_decode_hdr_maxsz + \
167 decode_stateid_maxsz)
168 #define encode_close_maxsz (op_encode_hdr_maxsz + \
169 1 + encode_stateid_maxsz)
170 #define decode_close_maxsz (op_decode_hdr_maxsz + \
171 decode_stateid_maxsz)
172 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
173 encode_stateid_maxsz + \
174 encode_attrs_maxsz)
175 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
176 nfs4_fattr_bitmap_maxsz)
177 #define encode_read_maxsz (op_encode_hdr_maxsz + \
178 encode_stateid_maxsz + 3)
179 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
180 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
181 2 + encode_verifier_maxsz + 5)
182 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
183 decode_verifier_maxsz)
184 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
185 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
186 #define encode_write_maxsz (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 4)
188 #define decode_write_maxsz (op_decode_hdr_maxsz + \
189 2 + decode_verifier_maxsz)
190 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
191 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
192 decode_verifier_maxsz)
193 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
194 nfs4_name_maxsz)
195 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
196 decode_change_info_maxsz)
197 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
198 2 * nfs4_name_maxsz)
199 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
200 decode_change_info_maxsz + \
201 decode_change_info_maxsz)
202 #define encode_link_maxsz (op_encode_hdr_maxsz + \
203 nfs4_name_maxsz)
204 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
205 #define encode_lockowner_maxsz (7)
206 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
207 7 + \
208 1 + encode_stateid_maxsz + 1 + \
209 encode_lockowner_maxsz)
210 #define decode_lock_denied_maxsz \
211 (8 + decode_lockowner_maxsz)
212 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
213 decode_lock_denied_maxsz)
214 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
215 encode_lockowner_maxsz)
216 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
217 decode_lock_denied_maxsz)
218 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
219 encode_stateid_maxsz + \
220 4)
221 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
222 decode_stateid_maxsz)
223 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
224 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
225 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
226 1 + nfs4_name_maxsz + \
227 1 + \
228 nfs4_fattr_maxsz)
229 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
230 #define encode_create_maxsz (op_encode_hdr_maxsz + \
231 1 + 2 + nfs4_name_maxsz + \
232 encode_attrs_maxsz)
233 #define decode_create_maxsz (op_decode_hdr_maxsz + \
234 decode_change_info_maxsz + \
235 nfs4_fattr_bitmap_maxsz)
236 #define encode_statfs_maxsz (encode_getattr_maxsz)
237 #define decode_statfs_maxsz (decode_getattr_maxsz)
238 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
239 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
240 #define encode_getacl_maxsz (encode_getattr_maxsz)
241 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
242 nfs4_fattr_bitmap_maxsz + 1)
243 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
244 encode_stateid_maxsz + 3)
245 #define decode_setacl_maxsz (decode_setattr_maxsz)
246 #define encode_fs_locations_maxsz \
247 (encode_getattr_maxsz)
248 #define decode_fs_locations_maxsz \
249 (0)
250
251 #if defined(CONFIG_NFS_V4_1)
252 #define NFS4_MAX_MACHINE_NAME_LEN (64)
253
254 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
255 encode_verifier_maxsz + \
256 1 /* co_ownerid.len */ + \
257 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
258 1 /* flags */ + \
259 1 /* spa_how */ + \
260 0 /* SP4_NONE (for now) */ + \
261 1 /* zero implemetation id array */)
262 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
263 2 /* eir_clientid */ + \
264 1 /* eir_sequenceid */ + \
265 1 /* eir_flags */ + \
266 1 /* spr_how */ + \
267 0 /* SP4_NONE (for now) */ + \
268 2 /* eir_server_owner.so_minor_id */ + \
269 /* eir_server_owner.so_major_id<> */ \
270 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
271 /* eir_server_scope<> */ \
272 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
273 1 /* eir_server_impl_id array length */ + \
274 0 /* ignored eir_server_impl_id contents */)
275 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
276 #define decode_channel_attrs_maxsz (6 + \
277 1 /* ca_rdma_ird.len */ + \
278 1 /* ca_rdma_ird */)
279 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
280 2 /* csa_clientid */ + \
281 1 /* csa_sequence */ + \
282 1 /* csa_flags */ + \
283 encode_channel_attrs_maxsz + \
284 encode_channel_attrs_maxsz + \
285 1 /* csa_cb_program */ + \
286 1 /* csa_sec_parms.len (1) */ + \
287 1 /* cb_secflavor (AUTH_SYS) */ + \
288 1 /* stamp */ + \
289 1 /* machinename.len */ + \
290 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
291 1 /* uid */ + \
292 1 /* gid */ + \
293 1 /* gids.len (0) */)
294 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
295 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
296 1 /* csr_sequence */ + \
297 1 /* csr_flags */ + \
298 decode_channel_attrs_maxsz + \
299 decode_channel_attrs_maxsz)
300 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
301 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
302 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
303 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
304 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
305 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
306 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
307 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
308 #else /* CONFIG_NFS_V4_1 */
309 #define encode_sequence_maxsz 0
310 #define decode_sequence_maxsz 0
311 #endif /* CONFIG_NFS_V4_1 */
312
313 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
314 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
315 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
316 encode_sequence_maxsz + \
317 encode_putfh_maxsz + \
318 encode_read_maxsz)
319 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
320 decode_sequence_maxsz + \
321 decode_putfh_maxsz + \
322 decode_read_maxsz)
323 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
324 encode_sequence_maxsz + \
325 encode_putfh_maxsz + \
326 encode_readlink_maxsz)
327 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
328 decode_sequence_maxsz + \
329 decode_putfh_maxsz + \
330 decode_readlink_maxsz)
331 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
332 encode_sequence_maxsz + \
333 encode_putfh_maxsz + \
334 encode_readdir_maxsz)
335 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
336 decode_sequence_maxsz + \
337 decode_putfh_maxsz + \
338 decode_readdir_maxsz)
339 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
340 encode_sequence_maxsz + \
341 encode_putfh_maxsz + \
342 encode_write_maxsz + \
343 encode_getattr_maxsz)
344 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
345 decode_sequence_maxsz + \
346 decode_putfh_maxsz + \
347 decode_write_maxsz + \
348 decode_getattr_maxsz)
349 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
350 encode_sequence_maxsz + \
351 encode_putfh_maxsz + \
352 encode_commit_maxsz + \
353 encode_getattr_maxsz)
354 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
355 decode_sequence_maxsz + \
356 decode_putfh_maxsz + \
357 decode_commit_maxsz + \
358 decode_getattr_maxsz)
359 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
360 encode_sequence_maxsz + \
361 encode_putfh_maxsz + \
362 encode_savefh_maxsz + \
363 encode_open_maxsz + \
364 encode_getfh_maxsz + \
365 encode_getattr_maxsz + \
366 encode_restorefh_maxsz + \
367 encode_getattr_maxsz)
368 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
369 decode_sequence_maxsz + \
370 decode_putfh_maxsz + \
371 decode_savefh_maxsz + \
372 decode_open_maxsz + \
373 decode_getfh_maxsz + \
374 decode_getattr_maxsz + \
375 decode_restorefh_maxsz + \
376 decode_getattr_maxsz)
377 #define NFS4_enc_open_confirm_sz \
378 (compound_encode_hdr_maxsz + \
379 encode_putfh_maxsz + \
380 encode_open_confirm_maxsz)
381 #define NFS4_dec_open_confirm_sz \
382 (compound_decode_hdr_maxsz + \
383 decode_putfh_maxsz + \
384 decode_open_confirm_maxsz)
385 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
386 encode_sequence_maxsz + \
387 encode_putfh_maxsz + \
388 encode_open_maxsz + \
389 encode_getattr_maxsz)
390 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
391 decode_sequence_maxsz + \
392 decode_putfh_maxsz + \
393 decode_open_maxsz + \
394 decode_getattr_maxsz)
395 #define NFS4_enc_open_downgrade_sz \
396 (compound_encode_hdr_maxsz + \
397 encode_sequence_maxsz + \
398 encode_putfh_maxsz + \
399 encode_open_downgrade_maxsz + \
400 encode_getattr_maxsz)
401 #define NFS4_dec_open_downgrade_sz \
402 (compound_decode_hdr_maxsz + \
403 decode_sequence_maxsz + \
404 decode_putfh_maxsz + \
405 decode_open_downgrade_maxsz + \
406 decode_getattr_maxsz)
407 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
408 encode_sequence_maxsz + \
409 encode_putfh_maxsz + \
410 encode_close_maxsz + \
411 encode_getattr_maxsz)
412 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
413 decode_sequence_maxsz + \
414 decode_putfh_maxsz + \
415 decode_close_maxsz + \
416 decode_getattr_maxsz)
417 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
418 encode_sequence_maxsz + \
419 encode_putfh_maxsz + \
420 encode_setattr_maxsz + \
421 encode_getattr_maxsz)
422 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
423 decode_sequence_maxsz + \
424 decode_putfh_maxsz + \
425 decode_setattr_maxsz + \
426 decode_getattr_maxsz)
427 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
428 encode_sequence_maxsz + \
429 encode_putfh_maxsz + \
430 encode_fsinfo_maxsz)
431 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
432 decode_sequence_maxsz + \
433 decode_putfh_maxsz + \
434 decode_fsinfo_maxsz)
435 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
436 encode_renew_maxsz)
437 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
438 decode_renew_maxsz)
439 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
440 encode_setclientid_maxsz)
441 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
442 decode_setclientid_maxsz)
443 #define NFS4_enc_setclientid_confirm_sz \
444 (compound_encode_hdr_maxsz + \
445 encode_setclientid_confirm_maxsz + \
446 encode_putrootfh_maxsz + \
447 encode_fsinfo_maxsz)
448 #define NFS4_dec_setclientid_confirm_sz \
449 (compound_decode_hdr_maxsz + \
450 decode_setclientid_confirm_maxsz + \
451 decode_putrootfh_maxsz + \
452 decode_fsinfo_maxsz)
453 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
454 encode_sequence_maxsz + \
455 encode_putfh_maxsz + \
456 encode_lock_maxsz)
457 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
458 decode_sequence_maxsz + \
459 decode_putfh_maxsz + \
460 decode_lock_maxsz)
461 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
462 encode_sequence_maxsz + \
463 encode_putfh_maxsz + \
464 encode_lockt_maxsz)
465 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
466 decode_sequence_maxsz + \
467 decode_putfh_maxsz + \
468 decode_lockt_maxsz)
469 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
470 encode_sequence_maxsz + \
471 encode_putfh_maxsz + \
472 encode_locku_maxsz)
473 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
474 decode_sequence_maxsz + \
475 decode_putfh_maxsz + \
476 decode_locku_maxsz)
477 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
478 encode_sequence_maxsz + \
479 encode_putfh_maxsz + \
480 encode_access_maxsz + \
481 encode_getattr_maxsz)
482 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
483 decode_sequence_maxsz + \
484 decode_putfh_maxsz + \
485 decode_access_maxsz + \
486 decode_getattr_maxsz)
487 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
488 encode_sequence_maxsz + \
489 encode_putfh_maxsz + \
490 encode_getattr_maxsz)
491 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_getattr_maxsz)
495 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
496 encode_sequence_maxsz + \
497 encode_putfh_maxsz + \
498 encode_lookup_maxsz + \
499 encode_getattr_maxsz + \
500 encode_getfh_maxsz)
501 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
502 decode_sequence_maxsz + \
503 decode_putfh_maxsz + \
504 decode_lookup_maxsz + \
505 decode_getattr_maxsz + \
506 decode_getfh_maxsz)
507 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
508 encode_sequence_maxsz + \
509 encode_putrootfh_maxsz + \
510 encode_getattr_maxsz + \
511 encode_getfh_maxsz)
512 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putrootfh_maxsz + \
515 decode_getattr_maxsz + \
516 decode_getfh_maxsz)
517 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_remove_maxsz + \
521 encode_getattr_maxsz)
522 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
523 decode_sequence_maxsz + \
524 decode_putfh_maxsz + \
525 decode_remove_maxsz + \
526 decode_getattr_maxsz)
527 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_savefh_maxsz + \
531 encode_putfh_maxsz + \
532 encode_rename_maxsz + \
533 encode_getattr_maxsz + \
534 encode_restorefh_maxsz + \
535 encode_getattr_maxsz)
536 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
537 decode_sequence_maxsz + \
538 decode_putfh_maxsz + \
539 decode_savefh_maxsz + \
540 decode_putfh_maxsz + \
541 decode_rename_maxsz + \
542 decode_getattr_maxsz + \
543 decode_restorefh_maxsz + \
544 decode_getattr_maxsz)
545 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
546 encode_sequence_maxsz + \
547 encode_putfh_maxsz + \
548 encode_savefh_maxsz + \
549 encode_putfh_maxsz + \
550 encode_link_maxsz + \
551 decode_getattr_maxsz + \
552 encode_restorefh_maxsz + \
553 decode_getattr_maxsz)
554 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
555 decode_sequence_maxsz + \
556 decode_putfh_maxsz + \
557 decode_savefh_maxsz + \
558 decode_putfh_maxsz + \
559 decode_link_maxsz + \
560 decode_getattr_maxsz + \
561 decode_restorefh_maxsz + \
562 decode_getattr_maxsz)
563 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
564 encode_sequence_maxsz + \
565 encode_putfh_maxsz + \
566 encode_symlink_maxsz + \
567 encode_getattr_maxsz + \
568 encode_getfh_maxsz)
569 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_symlink_maxsz + \
573 decode_getattr_maxsz + \
574 decode_getfh_maxsz)
575 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
576 encode_sequence_maxsz + \
577 encode_putfh_maxsz + \
578 encode_savefh_maxsz + \
579 encode_create_maxsz + \
580 encode_getfh_maxsz + \
581 encode_getattr_maxsz + \
582 encode_restorefh_maxsz + \
583 encode_getattr_maxsz)
584 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
585 decode_sequence_maxsz + \
586 decode_putfh_maxsz + \
587 decode_savefh_maxsz + \
588 decode_create_maxsz + \
589 decode_getfh_maxsz + \
590 decode_getattr_maxsz + \
591 decode_restorefh_maxsz + \
592 decode_getattr_maxsz)
593 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
594 encode_sequence_maxsz + \
595 encode_putfh_maxsz + \
596 encode_getattr_maxsz)
597 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
598 decode_sequence_maxsz + \
599 decode_putfh_maxsz + \
600 decode_getattr_maxsz)
601 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
602 encode_sequence_maxsz + \
603 encode_putfh_maxsz + \
604 encode_statfs_maxsz)
605 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
606 decode_sequence_maxsz + \
607 decode_putfh_maxsz + \
608 decode_statfs_maxsz)
609 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
610 encode_sequence_maxsz + \
611 encode_putfh_maxsz + \
612 encode_getattr_maxsz)
613 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
614 decode_sequence_maxsz + \
615 decode_putfh_maxsz + \
616 decode_getattr_maxsz)
617 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
618 encode_sequence_maxsz + \
619 encode_putfh_maxsz + \
620 encode_delegreturn_maxsz + \
621 encode_getattr_maxsz)
622 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
623 decode_sequence_maxsz + \
624 decode_delegreturn_maxsz + \
625 decode_getattr_maxsz)
626 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
627 encode_sequence_maxsz + \
628 encode_putfh_maxsz + \
629 encode_getacl_maxsz)
630 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
631 decode_sequence_maxsz + \
632 decode_putfh_maxsz + \
633 decode_getacl_maxsz)
634 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
635 encode_sequence_maxsz + \
636 encode_putfh_maxsz + \
637 encode_setacl_maxsz)
638 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
639 decode_sequence_maxsz + \
640 decode_putfh_maxsz + \
641 decode_setacl_maxsz)
642 #define NFS4_enc_fs_locations_sz \
643 (compound_encode_hdr_maxsz + \
644 encode_sequence_maxsz + \
645 encode_putfh_maxsz + \
646 encode_lookup_maxsz + \
647 encode_fs_locations_maxsz)
648 #define NFS4_dec_fs_locations_sz \
649 (compound_decode_hdr_maxsz + \
650 decode_sequence_maxsz + \
651 decode_putfh_maxsz + \
652 decode_lookup_maxsz + \
653 decode_fs_locations_maxsz)
654 #if defined(CONFIG_NFS_V4_1)
655 #define NFS4_enc_exchange_id_sz \
656 (compound_encode_hdr_maxsz + \
657 encode_exchange_id_maxsz)
658 #define NFS4_dec_exchange_id_sz \
659 (compound_decode_hdr_maxsz + \
660 decode_exchange_id_maxsz)
661 #define NFS4_enc_create_session_sz \
662 (compound_encode_hdr_maxsz + \
663 encode_create_session_maxsz)
664 #define NFS4_dec_create_session_sz \
665 (compound_decode_hdr_maxsz + \
666 decode_create_session_maxsz)
667 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
668 encode_destroy_session_maxsz)
669 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
670 decode_destroy_session_maxsz)
671 #define NFS4_enc_sequence_sz \
672 (compound_decode_hdr_maxsz + \
673 encode_sequence_maxsz)
674 #define NFS4_dec_sequence_sz \
675 (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz)
677 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
678 encode_sequence_maxsz + \
679 encode_putrootfh_maxsz + \
680 encode_fsinfo_maxsz)
681 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
682 decode_sequence_maxsz + \
683 decode_putrootfh_maxsz + \
684 decode_fsinfo_maxsz)
685 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
686 encode_sequence_maxsz + \
687 encode_reclaim_complete_maxsz)
688 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
689 decode_sequence_maxsz + \
690 decode_reclaim_complete_maxsz)
691
692 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
693 compound_encode_hdr_maxsz +
694 encode_sequence_maxsz +
695 encode_putfh_maxsz +
696 encode_getattr_maxsz) *
697 XDR_UNIT);
698
699 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
700 compound_decode_hdr_maxsz +
701 decode_sequence_maxsz +
702 decode_putfh_maxsz) *
703 XDR_UNIT);
704 #endif /* CONFIG_NFS_V4_1 */
705
706 static const umode_t nfs_type2fmt[] = {
707 [NF4BAD] = 0,
708 [NF4REG] = S_IFREG,
709 [NF4DIR] = S_IFDIR,
710 [NF4BLK] = S_IFBLK,
711 [NF4CHR] = S_IFCHR,
712 [NF4LNK] = S_IFLNK,
713 [NF4SOCK] = S_IFSOCK,
714 [NF4FIFO] = S_IFIFO,
715 [NF4ATTRDIR] = 0,
716 [NF4NAMEDATTR] = 0,
717 };
718
719 struct compound_hdr {
720 int32_t status;
721 uint32_t nops;
722 __be32 * nops_p;
723 uint32_t taglen;
724 char * tag;
725 uint32_t replen; /* expected reply words */
726 u32 minorversion;
727 };
728
729 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
730 {
731 __be32 *p = xdr_reserve_space(xdr, nbytes);
732 BUG_ON(!p);
733 return p;
734 }
735
736 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
737 {
738 __be32 *p;
739
740 p = xdr_reserve_space(xdr, 4 + len);
741 BUG_ON(p == NULL);
742 xdr_encode_opaque(p, str, len);
743 }
744
745 static void encode_compound_hdr(struct xdr_stream *xdr,
746 struct rpc_rqst *req,
747 struct compound_hdr *hdr)
748 {
749 __be32 *p;
750 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
751
752 /* initialize running count of expected bytes in reply.
753 * NOTE: the replied tag SHOULD be the same is the one sent,
754 * but this is not required as a MUST for the server to do so. */
755 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
756
757 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
758 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
759 p = reserve_space(xdr, 4 + hdr->taglen + 8);
760 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
761 *p++ = cpu_to_be32(hdr->minorversion);
762 hdr->nops_p = p;
763 *p = cpu_to_be32(hdr->nops);
764 }
765
766 static void encode_nops(struct compound_hdr *hdr)
767 {
768 BUG_ON(hdr->nops > NFS4_MAX_OPS);
769 *hdr->nops_p = htonl(hdr->nops);
770 }
771
772 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
773 {
774 __be32 *p;
775
776 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
777 BUG_ON(p == NULL);
778 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
779 }
780
781 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
782 {
783 char owner_name[IDMAP_NAMESZ];
784 char owner_group[IDMAP_NAMESZ];
785 int owner_namelen = 0;
786 int owner_grouplen = 0;
787 __be32 *p;
788 __be32 *q;
789 int len;
790 uint32_t bmval0 = 0;
791 uint32_t bmval1 = 0;
792
793 /*
794 * We reserve enough space to write the entire attribute buffer at once.
795 * In the worst-case, this would be
796 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
797 * = 36 bytes, plus any contribution from variable-length fields
798 * such as owner/group.
799 */
800 len = 16;
801
802 /* Sigh */
803 if (iap->ia_valid & ATTR_SIZE)
804 len += 8;
805 if (iap->ia_valid & ATTR_MODE)
806 len += 4;
807 if (iap->ia_valid & ATTR_UID) {
808 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
809 if (owner_namelen < 0) {
810 dprintk("nfs: couldn't resolve uid %d to string\n",
811 iap->ia_uid);
812 /* XXX */
813 strcpy(owner_name, "nobody");
814 owner_namelen = sizeof("nobody") - 1;
815 /* goto out; */
816 }
817 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
818 }
819 if (iap->ia_valid & ATTR_GID) {
820 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
821 if (owner_grouplen < 0) {
822 dprintk("nfs: couldn't resolve gid %d to string\n",
823 iap->ia_gid);
824 strcpy(owner_group, "nobody");
825 owner_grouplen = sizeof("nobody") - 1;
826 /* goto out; */
827 }
828 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
829 }
830 if (iap->ia_valid & ATTR_ATIME_SET)
831 len += 16;
832 else if (iap->ia_valid & ATTR_ATIME)
833 len += 4;
834 if (iap->ia_valid & ATTR_MTIME_SET)
835 len += 16;
836 else if (iap->ia_valid & ATTR_MTIME)
837 len += 4;
838 p = reserve_space(xdr, len);
839
840 /*
841 * We write the bitmap length now, but leave the bitmap and the attribute
842 * buffer length to be backfilled at the end of this routine.
843 */
844 *p++ = cpu_to_be32(2);
845 q = p;
846 p += 3;
847
848 if (iap->ia_valid & ATTR_SIZE) {
849 bmval0 |= FATTR4_WORD0_SIZE;
850 p = xdr_encode_hyper(p, iap->ia_size);
851 }
852 if (iap->ia_valid & ATTR_MODE) {
853 bmval1 |= FATTR4_WORD1_MODE;
854 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
855 }
856 if (iap->ia_valid & ATTR_UID) {
857 bmval1 |= FATTR4_WORD1_OWNER;
858 p = xdr_encode_opaque(p, owner_name, owner_namelen);
859 }
860 if (iap->ia_valid & ATTR_GID) {
861 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
862 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
863 }
864 if (iap->ia_valid & ATTR_ATIME_SET) {
865 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
866 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
867 *p++ = cpu_to_be32(0);
868 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
869 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
870 }
871 else if (iap->ia_valid & ATTR_ATIME) {
872 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
873 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
874 }
875 if (iap->ia_valid & ATTR_MTIME_SET) {
876 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
877 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
878 *p++ = cpu_to_be32(0);
879 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
880 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
881 }
882 else if (iap->ia_valid & ATTR_MTIME) {
883 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
884 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
885 }
886
887 /*
888 * Now we backfill the bitmap and the attribute buffer length.
889 */
890 if (len != ((char *)p - (char *)q) + 4) {
891 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
892 len, ((char *)p - (char *)q) + 4);
893 BUG();
894 }
895 len = (char *)p - (char *)q - 12;
896 *q++ = htonl(bmval0);
897 *q++ = htonl(bmval1);
898 *q = htonl(len);
899
900 /* out: */
901 }
902
903 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
904 {
905 __be32 *p;
906
907 p = reserve_space(xdr, 8);
908 *p++ = cpu_to_be32(OP_ACCESS);
909 *p = cpu_to_be32(access);
910 hdr->nops++;
911 hdr->replen += decode_access_maxsz;
912 }
913
914 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
915 {
916 __be32 *p;
917
918 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
919 *p++ = cpu_to_be32(OP_CLOSE);
920 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
921 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
922 hdr->nops++;
923 hdr->replen += decode_close_maxsz;
924 }
925
926 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
927 {
928 __be32 *p;
929
930 p = reserve_space(xdr, 16);
931 *p++ = cpu_to_be32(OP_COMMIT);
932 p = xdr_encode_hyper(p, args->offset);
933 *p = cpu_to_be32(args->count);
934 hdr->nops++;
935 hdr->replen += decode_commit_maxsz;
936 }
937
938 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
939 {
940 __be32 *p;
941
942 p = reserve_space(xdr, 8);
943 *p++ = cpu_to_be32(OP_CREATE);
944 *p = cpu_to_be32(create->ftype);
945
946 switch (create->ftype) {
947 case NF4LNK:
948 p = reserve_space(xdr, 4);
949 *p = cpu_to_be32(create->u.symlink.len);
950 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
951 break;
952
953 case NF4BLK: case NF4CHR:
954 p = reserve_space(xdr, 8);
955 *p++ = cpu_to_be32(create->u.device.specdata1);
956 *p = cpu_to_be32(create->u.device.specdata2);
957 break;
958
959 default:
960 break;
961 }
962
963 encode_string(xdr, create->name->len, create->name->name);
964 hdr->nops++;
965 hdr->replen += decode_create_maxsz;
966
967 encode_attrs(xdr, create->attrs, create->server);
968 }
969
970 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
971 {
972 __be32 *p;
973
974 p = reserve_space(xdr, 12);
975 *p++ = cpu_to_be32(OP_GETATTR);
976 *p++ = cpu_to_be32(1);
977 *p = cpu_to_be32(bitmap);
978 hdr->nops++;
979 hdr->replen += decode_getattr_maxsz;
980 }
981
982 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
983 {
984 __be32 *p;
985
986 p = reserve_space(xdr, 16);
987 *p++ = cpu_to_be32(OP_GETATTR);
988 *p++ = cpu_to_be32(2);
989 *p++ = cpu_to_be32(bm0);
990 *p = cpu_to_be32(bm1);
991 hdr->nops++;
992 hdr->replen += decode_getattr_maxsz;
993 }
994
995 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
996 {
997 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
998 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
999 }
1000
1001 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1002 {
1003 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1004 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1005 }
1006
1007 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1008 {
1009 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1010 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1011 }
1012
1013 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1014 {
1015 __be32 *p;
1016
1017 p = reserve_space(xdr, 4);
1018 *p = cpu_to_be32(OP_GETFH);
1019 hdr->nops++;
1020 hdr->replen += decode_getfh_maxsz;
1021 }
1022
1023 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1024 {
1025 __be32 *p;
1026
1027 p = reserve_space(xdr, 8 + name->len);
1028 *p++ = cpu_to_be32(OP_LINK);
1029 xdr_encode_opaque(p, name->name, name->len);
1030 hdr->nops++;
1031 hdr->replen += decode_link_maxsz;
1032 }
1033
1034 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1035 {
1036 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1037 return block ? NFS4_READW_LT : NFS4_READ_LT;
1038 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1039 }
1040
1041 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1042 {
1043 if (fl->fl_end == OFFSET_MAX)
1044 return ~(uint64_t)0;
1045 return fl->fl_end - fl->fl_start + 1;
1046 }
1047
1048 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1049 {
1050 __be32 *p;
1051
1052 p = reserve_space(xdr, 28);
1053 p = xdr_encode_hyper(p, lowner->clientid);
1054 *p++ = cpu_to_be32(16);
1055 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1056 xdr_encode_hyper(p, lowner->id);
1057 }
1058
1059 /*
1060 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1061 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1062 */
1063 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1064 {
1065 __be32 *p;
1066
1067 p = reserve_space(xdr, 32);
1068 *p++ = cpu_to_be32(OP_LOCK);
1069 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1070 *p++ = cpu_to_be32(args->reclaim);
1071 p = xdr_encode_hyper(p, args->fl->fl_start);
1072 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1073 *p = cpu_to_be32(args->new_lock_owner);
1074 if (args->new_lock_owner){
1075 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1076 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1077 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1078 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1079 encode_lockowner(xdr, &args->lock_owner);
1080 }
1081 else {
1082 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1083 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1084 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1085 }
1086 hdr->nops++;
1087 hdr->replen += decode_lock_maxsz;
1088 }
1089
1090 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1091 {
1092 __be32 *p;
1093
1094 p = reserve_space(xdr, 24);
1095 *p++ = cpu_to_be32(OP_LOCKT);
1096 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1097 p = xdr_encode_hyper(p, args->fl->fl_start);
1098 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1099 encode_lockowner(xdr, &args->lock_owner);
1100 hdr->nops++;
1101 hdr->replen += decode_lockt_maxsz;
1102 }
1103
1104 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1105 {
1106 __be32 *p;
1107
1108 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1109 *p++ = cpu_to_be32(OP_LOCKU);
1110 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1111 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1112 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1113 p = xdr_encode_hyper(p, args->fl->fl_start);
1114 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1115 hdr->nops++;
1116 hdr->replen += decode_locku_maxsz;
1117 }
1118
1119 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1120 {
1121 int len = name->len;
1122 __be32 *p;
1123
1124 p = reserve_space(xdr, 8 + len);
1125 *p++ = cpu_to_be32(OP_LOOKUP);
1126 xdr_encode_opaque(p, name->name, len);
1127 hdr->nops++;
1128 hdr->replen += decode_lookup_maxsz;
1129 }
1130
1131 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1132 {
1133 __be32 *p;
1134
1135 p = reserve_space(xdr, 8);
1136 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1137 case FMODE_READ:
1138 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1139 break;
1140 case FMODE_WRITE:
1141 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1142 break;
1143 case FMODE_READ|FMODE_WRITE:
1144 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1145 break;
1146 default:
1147 *p++ = cpu_to_be32(0);
1148 }
1149 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1150 }
1151
1152 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1153 {
1154 __be32 *p;
1155 /*
1156 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1157 * owner 4 = 32
1158 */
1159 p = reserve_space(xdr, 8);
1160 *p++ = cpu_to_be32(OP_OPEN);
1161 *p = cpu_to_be32(arg->seqid->sequence->counter);
1162 encode_share_access(xdr, arg->fmode);
1163 p = reserve_space(xdr, 28);
1164 p = xdr_encode_hyper(p, arg->clientid);
1165 *p++ = cpu_to_be32(16);
1166 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1167 xdr_encode_hyper(p, arg->id);
1168 }
1169
1170 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1171 {
1172 __be32 *p;
1173 struct nfs_client *clp;
1174
1175 p = reserve_space(xdr, 4);
1176 switch(arg->open_flags & O_EXCL) {
1177 case 0:
1178 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1179 encode_attrs(xdr, arg->u.attrs, arg->server);
1180 break;
1181 default:
1182 clp = arg->server->nfs_client;
1183 if (clp->cl_mvops->minor_version > 0) {
1184 if (nfs4_has_persistent_session(clp)) {
1185 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1186 encode_attrs(xdr, arg->u.attrs, arg->server);
1187 } else {
1188 struct iattr dummy;
1189
1190 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1191 encode_nfs4_verifier(xdr, &arg->u.verifier);
1192 dummy.ia_valid = 0;
1193 encode_attrs(xdr, &dummy, arg->server);
1194 }
1195 } else {
1196 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1197 encode_nfs4_verifier(xdr, &arg->u.verifier);
1198 }
1199 }
1200 }
1201
1202 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1203 {
1204 __be32 *p;
1205
1206 p = reserve_space(xdr, 4);
1207 switch (arg->open_flags & O_CREAT) {
1208 case 0:
1209 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1210 break;
1211 default:
1212 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1213 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1214 encode_createmode(xdr, arg);
1215 }
1216 }
1217
1218 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1219 {
1220 __be32 *p;
1221
1222 p = reserve_space(xdr, 4);
1223 switch (delegation_type) {
1224 case 0:
1225 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1226 break;
1227 case FMODE_READ:
1228 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1229 break;
1230 case FMODE_WRITE|FMODE_READ:
1231 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1232 break;
1233 default:
1234 BUG();
1235 }
1236 }
1237
1238 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1239 {
1240 __be32 *p;
1241
1242 p = reserve_space(xdr, 4);
1243 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1244 encode_string(xdr, name->len, name->name);
1245 }
1246
1247 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1248 {
1249 __be32 *p;
1250
1251 p = reserve_space(xdr, 4);
1252 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1253 encode_delegation_type(xdr, type);
1254 }
1255
1256 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1257 {
1258 __be32 *p;
1259
1260 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1261 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1262 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1263 encode_string(xdr, name->len, name->name);
1264 }
1265
1266 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1267 {
1268 encode_openhdr(xdr, arg);
1269 encode_opentype(xdr, arg);
1270 switch (arg->claim) {
1271 case NFS4_OPEN_CLAIM_NULL:
1272 encode_claim_null(xdr, arg->name);
1273 break;
1274 case NFS4_OPEN_CLAIM_PREVIOUS:
1275 encode_claim_previous(xdr, arg->u.delegation_type);
1276 break;
1277 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1278 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1279 break;
1280 default:
1281 BUG();
1282 }
1283 hdr->nops++;
1284 hdr->replen += decode_open_maxsz;
1285 }
1286
1287 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1288 {
1289 __be32 *p;
1290
1291 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1292 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1293 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1294 *p = cpu_to_be32(arg->seqid->sequence->counter);
1295 hdr->nops++;
1296 hdr->replen += decode_open_confirm_maxsz;
1297 }
1298
1299 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1300 {
1301 __be32 *p;
1302
1303 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1304 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1305 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1306 *p = cpu_to_be32(arg->seqid->sequence->counter);
1307 encode_share_access(xdr, arg->fmode);
1308 hdr->nops++;
1309 hdr->replen += decode_open_downgrade_maxsz;
1310 }
1311
1312 static void
1313 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1314 {
1315 int len = fh->size;
1316 __be32 *p;
1317
1318 p = reserve_space(xdr, 8 + len);
1319 *p++ = cpu_to_be32(OP_PUTFH);
1320 xdr_encode_opaque(p, fh->data, len);
1321 hdr->nops++;
1322 hdr->replen += decode_putfh_maxsz;
1323 }
1324
1325 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1326 {
1327 __be32 *p;
1328
1329 p = reserve_space(xdr, 4);
1330 *p = cpu_to_be32(OP_PUTROOTFH);
1331 hdr->nops++;
1332 hdr->replen += decode_putrootfh_maxsz;
1333 }
1334
1335 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1336 {
1337 nfs4_stateid stateid;
1338 __be32 *p;
1339
1340 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1341 if (ctx->state != NULL) {
1342 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner);
1343 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1344 } else
1345 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1346 }
1347
1348 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1349 {
1350 __be32 *p;
1351
1352 p = reserve_space(xdr, 4);
1353 *p = cpu_to_be32(OP_READ);
1354
1355 encode_stateid(xdr, args->context, args->lock_context);
1356
1357 p = reserve_space(xdr, 12);
1358 p = xdr_encode_hyper(p, args->offset);
1359 *p = cpu_to_be32(args->count);
1360 hdr->nops++;
1361 hdr->replen += decode_read_maxsz;
1362 }
1363
1364 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1365 {
1366 uint32_t attrs[2] = {
1367 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1368 FATTR4_WORD1_MOUNTED_ON_FILEID,
1369 };
1370 __be32 *p;
1371
1372 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1373 *p++ = cpu_to_be32(OP_READDIR);
1374 p = xdr_encode_hyper(p, readdir->cookie);
1375 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1376 *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
1377 *p++ = cpu_to_be32(readdir->count);
1378 *p++ = cpu_to_be32(2);
1379 /* Switch to mounted_on_fileid if the server supports it */
1380 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1381 attrs[0] &= ~FATTR4_WORD0_FILEID;
1382 else
1383 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1384 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1385 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1386 hdr->nops++;
1387 hdr->replen += decode_readdir_maxsz;
1388 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1389 __func__,
1390 (unsigned long long)readdir->cookie,
1391 ((u32 *)readdir->verifier.data)[0],
1392 ((u32 *)readdir->verifier.data)[1],
1393 attrs[0] & readdir->bitmask[0],
1394 attrs[1] & readdir->bitmask[1]);
1395 }
1396
1397 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1398 {
1399 __be32 *p;
1400
1401 p = reserve_space(xdr, 4);
1402 *p = cpu_to_be32(OP_READLINK);
1403 hdr->nops++;
1404 hdr->replen += decode_readlink_maxsz;
1405 }
1406
1407 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1408 {
1409 __be32 *p;
1410
1411 p = reserve_space(xdr, 8 + name->len);
1412 *p++ = cpu_to_be32(OP_REMOVE);
1413 xdr_encode_opaque(p, name->name, name->len);
1414 hdr->nops++;
1415 hdr->replen += decode_remove_maxsz;
1416 }
1417
1418 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1419 {
1420 __be32 *p;
1421
1422 p = reserve_space(xdr, 4);
1423 *p = cpu_to_be32(OP_RENAME);
1424 encode_string(xdr, oldname->len, oldname->name);
1425 encode_string(xdr, newname->len, newname->name);
1426 hdr->nops++;
1427 hdr->replen += decode_rename_maxsz;
1428 }
1429
1430 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1431 {
1432 __be32 *p;
1433
1434 p = reserve_space(xdr, 12);
1435 *p++ = cpu_to_be32(OP_RENEW);
1436 xdr_encode_hyper(p, client_stateid->cl_clientid);
1437 hdr->nops++;
1438 hdr->replen += decode_renew_maxsz;
1439 }
1440
1441 static void
1442 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1443 {
1444 __be32 *p;
1445
1446 p = reserve_space(xdr, 4);
1447 *p = cpu_to_be32(OP_RESTOREFH);
1448 hdr->nops++;
1449 hdr->replen += decode_restorefh_maxsz;
1450 }
1451
1452 static int
1453 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1454 {
1455 __be32 *p;
1456
1457 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1458 *p++ = cpu_to_be32(OP_SETATTR);
1459 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1460 p = reserve_space(xdr, 2*4);
1461 *p++ = cpu_to_be32(1);
1462 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1463 if (arg->acl_len % 4)
1464 return -EINVAL;
1465 p = reserve_space(xdr, 4);
1466 *p = cpu_to_be32(arg->acl_len);
1467 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1468 hdr->nops++;
1469 hdr->replen += decode_setacl_maxsz;
1470 return 0;
1471 }
1472
1473 static void
1474 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1475 {
1476 __be32 *p;
1477
1478 p = reserve_space(xdr, 4);
1479 *p = cpu_to_be32(OP_SAVEFH);
1480 hdr->nops++;
1481 hdr->replen += decode_savefh_maxsz;
1482 }
1483
1484 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1485 {
1486 __be32 *p;
1487
1488 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1489 *p++ = cpu_to_be32(OP_SETATTR);
1490 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1491 hdr->nops++;
1492 hdr->replen += decode_setattr_maxsz;
1493 encode_attrs(xdr, arg->iap, server);
1494 }
1495
1496 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1497 {
1498 __be32 *p;
1499
1500 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1501 *p++ = cpu_to_be32(OP_SETCLIENTID);
1502 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1503
1504 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1505 p = reserve_space(xdr, 4);
1506 *p = cpu_to_be32(setclientid->sc_prog);
1507 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1508 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1509 p = reserve_space(xdr, 4);
1510 *p = cpu_to_be32(setclientid->sc_cb_ident);
1511 hdr->nops++;
1512 hdr->replen += decode_setclientid_maxsz;
1513 }
1514
1515 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1516 {
1517 __be32 *p;
1518
1519 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1520 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1521 p = xdr_encode_hyper(p, arg->clientid);
1522 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1523 hdr->nops++;
1524 hdr->replen += decode_setclientid_confirm_maxsz;
1525 }
1526
1527 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1528 {
1529 __be32 *p;
1530
1531 p = reserve_space(xdr, 4);
1532 *p = cpu_to_be32(OP_WRITE);
1533
1534 encode_stateid(xdr, args->context, args->lock_context);
1535
1536 p = reserve_space(xdr, 16);
1537 p = xdr_encode_hyper(p, args->offset);
1538 *p++ = cpu_to_be32(args->stable);
1539 *p = cpu_to_be32(args->count);
1540
1541 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1542 hdr->nops++;
1543 hdr->replen += decode_write_maxsz;
1544 }
1545
1546 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1547 {
1548 __be32 *p;
1549
1550 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1551
1552 *p++ = cpu_to_be32(OP_DELEGRETURN);
1553 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1554 hdr->nops++;
1555 hdr->replen += decode_delegreturn_maxsz;
1556 }
1557
1558 #if defined(CONFIG_NFS_V4_1)
1559 /* NFSv4.1 operations */
1560 static void encode_exchange_id(struct xdr_stream *xdr,
1561 struct nfs41_exchange_id_args *args,
1562 struct compound_hdr *hdr)
1563 {
1564 __be32 *p;
1565
1566 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1567 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1568 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1569
1570 encode_string(xdr, args->id_len, args->id);
1571
1572 p = reserve_space(xdr, 12);
1573 *p++ = cpu_to_be32(args->flags);
1574 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1575 *p = cpu_to_be32(0); /* zero length implementation id array */
1576 hdr->nops++;
1577 hdr->replen += decode_exchange_id_maxsz;
1578 }
1579
1580 static void encode_create_session(struct xdr_stream *xdr,
1581 struct nfs41_create_session_args *args,
1582 struct compound_hdr *hdr)
1583 {
1584 __be32 *p;
1585 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1586 uint32_t len;
1587 struct nfs_client *clp = args->client;
1588 u32 max_resp_sz_cached;
1589
1590 /*
1591 * Assumes OPEN is the biggest non-idempotent compound.
1592 * 2 is the verifier.
1593 */
1594 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1595 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1596
1597 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1598 clp->cl_ipaddr);
1599
1600 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1601 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1602 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1603 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1604 *p++ = cpu_to_be32(args->flags); /*flags */
1605
1606 /* Fore Channel */
1607 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1608 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1609 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1610 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1611 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1612 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1613 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1614
1615 /* Back Channel */
1616 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1617 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1618 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1619 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1620 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1621 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1622 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1623
1624 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1625 *p++ = cpu_to_be32(1);
1626 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1627
1628 /* authsys_parms rfc1831 */
1629 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1630 p = xdr_encode_opaque(p, machine_name, len);
1631 *p++ = cpu_to_be32(0); /* UID */
1632 *p++ = cpu_to_be32(0); /* GID */
1633 *p = cpu_to_be32(0); /* No more gids */
1634 hdr->nops++;
1635 hdr->replen += decode_create_session_maxsz;
1636 }
1637
1638 static void encode_destroy_session(struct xdr_stream *xdr,
1639 struct nfs4_session *session,
1640 struct compound_hdr *hdr)
1641 {
1642 __be32 *p;
1643 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1644 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1645 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1646 hdr->nops++;
1647 hdr->replen += decode_destroy_session_maxsz;
1648 }
1649
1650 static void encode_reclaim_complete(struct xdr_stream *xdr,
1651 struct nfs41_reclaim_complete_args *args,
1652 struct compound_hdr *hdr)
1653 {
1654 __be32 *p;
1655
1656 p = reserve_space(xdr, 8);
1657 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1658 *p++ = cpu_to_be32(args->one_fs);
1659 hdr->nops++;
1660 hdr->replen += decode_reclaim_complete_maxsz;
1661 }
1662 #endif /* CONFIG_NFS_V4_1 */
1663
1664 static void encode_sequence(struct xdr_stream *xdr,
1665 const struct nfs4_sequence_args *args,
1666 struct compound_hdr *hdr)
1667 {
1668 #if defined(CONFIG_NFS_V4_1)
1669 struct nfs4_session *session = args->sa_session;
1670 struct nfs4_slot_table *tp;
1671 struct nfs4_slot *slot;
1672 __be32 *p;
1673
1674 if (!session)
1675 return;
1676
1677 tp = &session->fc_slot_table;
1678
1679 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1680 slot = tp->slots + args->sa_slotid;
1681
1682 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1683 *p++ = cpu_to_be32(OP_SEQUENCE);
1684
1685 /*
1686 * Sessionid + seqid + slotid + max slotid + cache_this
1687 */
1688 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1689 "max_slotid=%d cache_this=%d\n",
1690 __func__,
1691 ((u32 *)session->sess_id.data)[0],
1692 ((u32 *)session->sess_id.data)[1],
1693 ((u32 *)session->sess_id.data)[2],
1694 ((u32 *)session->sess_id.data)[3],
1695 slot->seq_nr, args->sa_slotid,
1696 tp->highest_used_slotid, args->sa_cache_this);
1697 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1698 *p++ = cpu_to_be32(slot->seq_nr);
1699 *p++ = cpu_to_be32(args->sa_slotid);
1700 *p++ = cpu_to_be32(tp->highest_used_slotid);
1701 *p = cpu_to_be32(args->sa_cache_this);
1702 hdr->nops++;
1703 hdr->replen += decode_sequence_maxsz;
1704 #endif /* CONFIG_NFS_V4_1 */
1705 }
1706
1707 /*
1708 * END OF "GENERIC" ENCODE ROUTINES.
1709 */
1710
1711 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1712 {
1713 #if defined(CONFIG_NFS_V4_1)
1714 if (args->sa_session)
1715 return args->sa_session->clp->cl_mvops->minor_version;
1716 #endif /* CONFIG_NFS_V4_1 */
1717 return 0;
1718 }
1719
1720 /*
1721 * Encode an ACCESS request
1722 */
1723 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1724 {
1725 struct xdr_stream xdr;
1726 struct compound_hdr hdr = {
1727 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1728 };
1729
1730 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1731 encode_compound_hdr(&xdr, req, &hdr);
1732 encode_sequence(&xdr, &args->seq_args, &hdr);
1733 encode_putfh(&xdr, args->fh, &hdr);
1734 encode_access(&xdr, args->access, &hdr);
1735 encode_getfattr(&xdr, args->bitmask, &hdr);
1736 encode_nops(&hdr);
1737 return 0;
1738 }
1739
1740 /*
1741 * Encode LOOKUP request
1742 */
1743 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1744 {
1745 struct xdr_stream xdr;
1746 struct compound_hdr hdr = {
1747 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1748 };
1749
1750 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1751 encode_compound_hdr(&xdr, req, &hdr);
1752 encode_sequence(&xdr, &args->seq_args, &hdr);
1753 encode_putfh(&xdr, args->dir_fh, &hdr);
1754 encode_lookup(&xdr, args->name, &hdr);
1755 encode_getfh(&xdr, &hdr);
1756 encode_getfattr(&xdr, args->bitmask, &hdr);
1757 encode_nops(&hdr);
1758 return 0;
1759 }
1760
1761 /*
1762 * Encode LOOKUP_ROOT request
1763 */
1764 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1765 {
1766 struct xdr_stream xdr;
1767 struct compound_hdr hdr = {
1768 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1769 };
1770
1771 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1772 encode_compound_hdr(&xdr, req, &hdr);
1773 encode_sequence(&xdr, &args->seq_args, &hdr);
1774 encode_putrootfh(&xdr, &hdr);
1775 encode_getfh(&xdr, &hdr);
1776 encode_getfattr(&xdr, args->bitmask, &hdr);
1777 encode_nops(&hdr);
1778 return 0;
1779 }
1780
1781 /*
1782 * Encode REMOVE request
1783 */
1784 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1785 {
1786 struct xdr_stream xdr;
1787 struct compound_hdr hdr = {
1788 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1789 };
1790
1791 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1792 encode_compound_hdr(&xdr, req, &hdr);
1793 encode_sequence(&xdr, &args->seq_args, &hdr);
1794 encode_putfh(&xdr, args->fh, &hdr);
1795 encode_remove(&xdr, &args->name, &hdr);
1796 encode_getfattr(&xdr, args->bitmask, &hdr);
1797 encode_nops(&hdr);
1798 return 0;
1799 }
1800
1801 /*
1802 * Encode RENAME request
1803 */
1804 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1805 {
1806 struct xdr_stream xdr;
1807 struct compound_hdr hdr = {
1808 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1809 };
1810
1811 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1812 encode_compound_hdr(&xdr, req, &hdr);
1813 encode_sequence(&xdr, &args->seq_args, &hdr);
1814 encode_putfh(&xdr, args->old_dir, &hdr);
1815 encode_savefh(&xdr, &hdr);
1816 encode_putfh(&xdr, args->new_dir, &hdr);
1817 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1818 encode_getfattr(&xdr, args->bitmask, &hdr);
1819 encode_restorefh(&xdr, &hdr);
1820 encode_getfattr(&xdr, args->bitmask, &hdr);
1821 encode_nops(&hdr);
1822 return 0;
1823 }
1824
1825 /*
1826 * Encode LINK request
1827 */
1828 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1829 {
1830 struct xdr_stream xdr;
1831 struct compound_hdr hdr = {
1832 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1833 };
1834
1835 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1836 encode_compound_hdr(&xdr, req, &hdr);
1837 encode_sequence(&xdr, &args->seq_args, &hdr);
1838 encode_putfh(&xdr, args->fh, &hdr);
1839 encode_savefh(&xdr, &hdr);
1840 encode_putfh(&xdr, args->dir_fh, &hdr);
1841 encode_link(&xdr, args->name, &hdr);
1842 encode_getfattr(&xdr, args->bitmask, &hdr);
1843 encode_restorefh(&xdr, &hdr);
1844 encode_getfattr(&xdr, args->bitmask, &hdr);
1845 encode_nops(&hdr);
1846 return 0;
1847 }
1848
1849 /*
1850 * Encode CREATE request
1851 */
1852 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1853 {
1854 struct xdr_stream xdr;
1855 struct compound_hdr hdr = {
1856 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1857 };
1858
1859 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1860 encode_compound_hdr(&xdr, req, &hdr);
1861 encode_sequence(&xdr, &args->seq_args, &hdr);
1862 encode_putfh(&xdr, args->dir_fh, &hdr);
1863 encode_savefh(&xdr, &hdr);
1864 encode_create(&xdr, args, &hdr);
1865 encode_getfh(&xdr, &hdr);
1866 encode_getfattr(&xdr, args->bitmask, &hdr);
1867 encode_restorefh(&xdr, &hdr);
1868 encode_getfattr(&xdr, args->bitmask, &hdr);
1869 encode_nops(&hdr);
1870 return 0;
1871 }
1872
1873 /*
1874 * Encode SYMLINK request
1875 */
1876 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1877 {
1878 return nfs4_xdr_enc_create(req, p, args);
1879 }
1880
1881 /*
1882 * Encode GETATTR request
1883 */
1884 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1885 {
1886 struct xdr_stream xdr;
1887 struct compound_hdr hdr = {
1888 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1889 };
1890
1891 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1892 encode_compound_hdr(&xdr, req, &hdr);
1893 encode_sequence(&xdr, &args->seq_args, &hdr);
1894 encode_putfh(&xdr, args->fh, &hdr);
1895 encode_getfattr(&xdr, args->bitmask, &hdr);
1896 encode_nops(&hdr);
1897 return 0;
1898 }
1899
1900 /*
1901 * Encode a CLOSE request
1902 */
1903 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1904 {
1905 struct xdr_stream xdr;
1906 struct compound_hdr hdr = {
1907 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1908 };
1909
1910 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911 encode_compound_hdr(&xdr, req, &hdr);
1912 encode_sequence(&xdr, &args->seq_args, &hdr);
1913 encode_putfh(&xdr, args->fh, &hdr);
1914 encode_close(&xdr, args, &hdr);
1915 encode_getfattr(&xdr, args->bitmask, &hdr);
1916 encode_nops(&hdr);
1917 return 0;
1918 }
1919
1920 /*
1921 * Encode an OPEN request
1922 */
1923 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1924 {
1925 struct xdr_stream xdr;
1926 struct compound_hdr hdr = {
1927 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1928 };
1929
1930 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1931 encode_compound_hdr(&xdr, req, &hdr);
1932 encode_sequence(&xdr, &args->seq_args, &hdr);
1933 encode_putfh(&xdr, args->fh, &hdr);
1934 encode_savefh(&xdr, &hdr);
1935 encode_open(&xdr, args, &hdr);
1936 encode_getfh(&xdr, &hdr);
1937 encode_getfattr(&xdr, args->bitmask, &hdr);
1938 encode_restorefh(&xdr, &hdr);
1939 encode_getfattr(&xdr, args->bitmask, &hdr);
1940 encode_nops(&hdr);
1941 return 0;
1942 }
1943
1944 /*
1945 * Encode an OPEN_CONFIRM request
1946 */
1947 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1948 {
1949 struct xdr_stream xdr;
1950 struct compound_hdr hdr = {
1951 .nops = 0,
1952 };
1953
1954 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1955 encode_compound_hdr(&xdr, req, &hdr);
1956 encode_putfh(&xdr, args->fh, &hdr);
1957 encode_open_confirm(&xdr, args, &hdr);
1958 encode_nops(&hdr);
1959 return 0;
1960 }
1961
1962 /*
1963 * Encode an OPEN request with no attributes.
1964 */
1965 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1966 {
1967 struct xdr_stream xdr;
1968 struct compound_hdr hdr = {
1969 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1970 };
1971
1972 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1973 encode_compound_hdr(&xdr, req, &hdr);
1974 encode_sequence(&xdr, &args->seq_args, &hdr);
1975 encode_putfh(&xdr, args->fh, &hdr);
1976 encode_open(&xdr, args, &hdr);
1977 encode_getfattr(&xdr, args->bitmask, &hdr);
1978 encode_nops(&hdr);
1979 return 0;
1980 }
1981
1982 /*
1983 * Encode an OPEN_DOWNGRADE request
1984 */
1985 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1986 {
1987 struct xdr_stream xdr;
1988 struct compound_hdr hdr = {
1989 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1990 };
1991
1992 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1993 encode_compound_hdr(&xdr, req, &hdr);
1994 encode_sequence(&xdr, &args->seq_args, &hdr);
1995 encode_putfh(&xdr, args->fh, &hdr);
1996 encode_open_downgrade(&xdr, args, &hdr);
1997 encode_getfattr(&xdr, args->bitmask, &hdr);
1998 encode_nops(&hdr);
1999 return 0;
2000 }
2001
2002 /*
2003 * Encode a LOCK request
2004 */
2005 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
2006 {
2007 struct xdr_stream xdr;
2008 struct compound_hdr hdr = {
2009 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2010 };
2011
2012 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2013 encode_compound_hdr(&xdr, req, &hdr);
2014 encode_sequence(&xdr, &args->seq_args, &hdr);
2015 encode_putfh(&xdr, args->fh, &hdr);
2016 encode_lock(&xdr, args, &hdr);
2017 encode_nops(&hdr);
2018 return 0;
2019 }
2020
2021 /*
2022 * Encode a LOCKT request
2023 */
2024 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2025 {
2026 struct xdr_stream xdr;
2027 struct compound_hdr hdr = {
2028 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2029 };
2030
2031 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2032 encode_compound_hdr(&xdr, req, &hdr);
2033 encode_sequence(&xdr, &args->seq_args, &hdr);
2034 encode_putfh(&xdr, args->fh, &hdr);
2035 encode_lockt(&xdr, args, &hdr);
2036 encode_nops(&hdr);
2037 return 0;
2038 }
2039
2040 /*
2041 * Encode a LOCKU request
2042 */
2043 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2044 {
2045 struct xdr_stream xdr;
2046 struct compound_hdr hdr = {
2047 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2048 };
2049
2050 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2051 encode_compound_hdr(&xdr, req, &hdr);
2052 encode_sequence(&xdr, &args->seq_args, &hdr);
2053 encode_putfh(&xdr, args->fh, &hdr);
2054 encode_locku(&xdr, args, &hdr);
2055 encode_nops(&hdr);
2056 return 0;
2057 }
2058
2059 /*
2060 * Encode a READLINK request
2061 */
2062 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2063 {
2064 struct xdr_stream xdr;
2065 struct compound_hdr hdr = {
2066 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2067 };
2068
2069 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2070 encode_compound_hdr(&xdr, req, &hdr);
2071 encode_sequence(&xdr, &args->seq_args, &hdr);
2072 encode_putfh(&xdr, args->fh, &hdr);
2073 encode_readlink(&xdr, args, req, &hdr);
2074
2075 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2076 args->pgbase, args->pglen);
2077 encode_nops(&hdr);
2078 return 0;
2079 }
2080
2081 /*
2082 * Encode a READDIR request
2083 */
2084 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2085 {
2086 struct xdr_stream xdr;
2087 struct compound_hdr hdr = {
2088 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2089 };
2090
2091 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2092 encode_compound_hdr(&xdr, req, &hdr);
2093 encode_sequence(&xdr, &args->seq_args, &hdr);
2094 encode_putfh(&xdr, args->fh, &hdr);
2095 encode_readdir(&xdr, args, req, &hdr);
2096
2097 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2098 args->pgbase, args->count);
2099 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2100 __func__, hdr.replen << 2, args->pages,
2101 args->pgbase, args->count);
2102 encode_nops(&hdr);
2103 return 0;
2104 }
2105
2106 /*
2107 * Encode a READ request
2108 */
2109 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2110 {
2111 struct xdr_stream xdr;
2112 struct compound_hdr hdr = {
2113 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114 };
2115
2116 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2117 encode_compound_hdr(&xdr, req, &hdr);
2118 encode_sequence(&xdr, &args->seq_args, &hdr);
2119 encode_putfh(&xdr, args->fh, &hdr);
2120 encode_read(&xdr, args, &hdr);
2121
2122 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2123 args->pages, args->pgbase, args->count);
2124 req->rq_rcv_buf.flags |= XDRBUF_READ;
2125 encode_nops(&hdr);
2126 return 0;
2127 }
2128
2129 /*
2130 * Encode an SETATTR request
2131 */
2132 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2133 {
2134 struct xdr_stream xdr;
2135 struct compound_hdr hdr = {
2136 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137 };
2138
2139 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140 encode_compound_hdr(&xdr, req, &hdr);
2141 encode_sequence(&xdr, &args->seq_args, &hdr);
2142 encode_putfh(&xdr, args->fh, &hdr);
2143 encode_setattr(&xdr, args, args->server, &hdr);
2144 encode_getfattr(&xdr, args->bitmask, &hdr);
2145 encode_nops(&hdr);
2146 return 0;
2147 }
2148
2149 /*
2150 * Encode a GETACL request
2151 */
2152 static int
2153 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2154 struct nfs_getaclargs *args)
2155 {
2156 struct xdr_stream xdr;
2157 struct compound_hdr hdr = {
2158 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159 };
2160 uint32_t replen;
2161
2162 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2163 encode_compound_hdr(&xdr, req, &hdr);
2164 encode_sequence(&xdr, &args->seq_args, &hdr);
2165 encode_putfh(&xdr, args->fh, &hdr);
2166 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2167 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2168
2169 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2170 args->acl_pages, args->acl_pgbase, args->acl_len);
2171 encode_nops(&hdr);
2172 return 0;
2173 }
2174
2175 /*
2176 * Encode a WRITE request
2177 */
2178 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2179 {
2180 struct xdr_stream xdr;
2181 struct compound_hdr hdr = {
2182 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183 };
2184
2185 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2186 encode_compound_hdr(&xdr, req, &hdr);
2187 encode_sequence(&xdr, &args->seq_args, &hdr);
2188 encode_putfh(&xdr, args->fh, &hdr);
2189 encode_write(&xdr, args, &hdr);
2190 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2191 encode_getfattr(&xdr, args->bitmask, &hdr);
2192 encode_nops(&hdr);
2193 return 0;
2194 }
2195
2196 /*
2197 * a COMMIT request
2198 */
2199 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2200 {
2201 struct xdr_stream xdr;
2202 struct compound_hdr hdr = {
2203 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2204 };
2205
2206 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2207 encode_compound_hdr(&xdr, req, &hdr);
2208 encode_sequence(&xdr, &args->seq_args, &hdr);
2209 encode_putfh(&xdr, args->fh, &hdr);
2210 encode_commit(&xdr, args, &hdr);
2211 encode_getfattr(&xdr, args->bitmask, &hdr);
2212 encode_nops(&hdr);
2213 return 0;
2214 }
2215
2216 /*
2217 * FSINFO request
2218 */
2219 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2220 {
2221 struct xdr_stream xdr;
2222 struct compound_hdr hdr = {
2223 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2224 };
2225
2226 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2227 encode_compound_hdr(&xdr, req, &hdr);
2228 encode_sequence(&xdr, &args->seq_args, &hdr);
2229 encode_putfh(&xdr, args->fh, &hdr);
2230 encode_fsinfo(&xdr, args->bitmask, &hdr);
2231 encode_nops(&hdr);
2232 return 0;
2233 }
2234
2235 /*
2236 * a PATHCONF request
2237 */
2238 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2239 {
2240 struct xdr_stream xdr;
2241 struct compound_hdr hdr = {
2242 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2243 };
2244
2245 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2246 encode_compound_hdr(&xdr, req, &hdr);
2247 encode_sequence(&xdr, &args->seq_args, &hdr);
2248 encode_putfh(&xdr, args->fh, &hdr);
2249 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2250 &hdr);
2251 encode_nops(&hdr);
2252 return 0;
2253 }
2254
2255 /*
2256 * a STATFS request
2257 */
2258 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2259 {
2260 struct xdr_stream xdr;
2261 struct compound_hdr hdr = {
2262 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2263 };
2264
2265 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2266 encode_compound_hdr(&xdr, req, &hdr);
2267 encode_sequence(&xdr, &args->seq_args, &hdr);
2268 encode_putfh(&xdr, args->fh, &hdr);
2269 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2270 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2271 encode_nops(&hdr);
2272 return 0;
2273 }
2274
2275 /*
2276 * GETATTR_BITMAP request
2277 */
2278 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2279 struct nfs4_server_caps_arg *args)
2280 {
2281 struct xdr_stream xdr;
2282 struct compound_hdr hdr = {
2283 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284 };
2285
2286 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2287 encode_compound_hdr(&xdr, req, &hdr);
2288 encode_sequence(&xdr, &args->seq_args, &hdr);
2289 encode_putfh(&xdr, args->fhandle, &hdr);
2290 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2291 FATTR4_WORD0_LINK_SUPPORT|
2292 FATTR4_WORD0_SYMLINK_SUPPORT|
2293 FATTR4_WORD0_ACLSUPPORT, &hdr);
2294 encode_nops(&hdr);
2295 return 0;
2296 }
2297
2298 /*
2299 * a RENEW request
2300 */
2301 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2302 {
2303 struct xdr_stream xdr;
2304 struct compound_hdr hdr = {
2305 .nops = 0,
2306 };
2307
2308 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2309 encode_compound_hdr(&xdr, req, &hdr);
2310 encode_renew(&xdr, clp, &hdr);
2311 encode_nops(&hdr);
2312 return 0;
2313 }
2314
2315 /*
2316 * a SETCLIENTID request
2317 */
2318 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2319 {
2320 struct xdr_stream xdr;
2321 struct compound_hdr hdr = {
2322 .nops = 0,
2323 };
2324
2325 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2326 encode_compound_hdr(&xdr, req, &hdr);
2327 encode_setclientid(&xdr, sc, &hdr);
2328 encode_nops(&hdr);
2329 return 0;
2330 }
2331
2332 /*
2333 * a SETCLIENTID_CONFIRM request
2334 */
2335 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
2336 {
2337 struct xdr_stream xdr;
2338 struct compound_hdr hdr = {
2339 .nops = 0,
2340 };
2341 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2342
2343 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2344 encode_compound_hdr(&xdr, req, &hdr);
2345 encode_setclientid_confirm(&xdr, arg, &hdr);
2346 encode_putrootfh(&xdr, &hdr);
2347 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2348 encode_nops(&hdr);
2349 return 0;
2350 }
2351
2352 /*
2353 * DELEGRETURN request
2354 */
2355 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2356 {
2357 struct xdr_stream xdr;
2358 struct compound_hdr hdr = {
2359 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2360 };
2361
2362 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2363 encode_compound_hdr(&xdr, req, &hdr);
2364 encode_sequence(&xdr, &args->seq_args, &hdr);
2365 encode_putfh(&xdr, args->fhandle, &hdr);
2366 encode_delegreturn(&xdr, args->stateid, &hdr);
2367 encode_getfattr(&xdr, args->bitmask, &hdr);
2368 encode_nops(&hdr);
2369 return 0;
2370 }
2371
2372 /*
2373 * Encode FS_LOCATIONS request
2374 */
2375 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2376 {
2377 struct xdr_stream xdr;
2378 struct compound_hdr hdr = {
2379 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2380 };
2381 uint32_t replen;
2382
2383 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2384 encode_compound_hdr(&xdr, req, &hdr);
2385 encode_sequence(&xdr, &args->seq_args, &hdr);
2386 encode_putfh(&xdr, args->dir_fh, &hdr);
2387 encode_lookup(&xdr, args->name, &hdr);
2388 replen = hdr.replen; /* get the attribute into args->page */
2389 encode_fs_locations(&xdr, args->bitmask, &hdr);
2390
2391 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2392 0, PAGE_SIZE);
2393 encode_nops(&hdr);
2394 return 0;
2395 }
2396
2397 #if defined(CONFIG_NFS_V4_1)
2398 /*
2399 * EXCHANGE_ID request
2400 */
2401 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2402 struct nfs41_exchange_id_args *args)
2403 {
2404 struct xdr_stream xdr;
2405 struct compound_hdr hdr = {
2406 .minorversion = args->client->cl_mvops->minor_version,
2407 };
2408
2409 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2410 encode_compound_hdr(&xdr, req, &hdr);
2411 encode_exchange_id(&xdr, args, &hdr);
2412 encode_nops(&hdr);
2413 return 0;
2414 }
2415
2416 /*
2417 * a CREATE_SESSION request
2418 */
2419 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2420 struct nfs41_create_session_args *args)
2421 {
2422 struct xdr_stream xdr;
2423 struct compound_hdr hdr = {
2424 .minorversion = args->client->cl_mvops->minor_version,
2425 };
2426
2427 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2428 encode_compound_hdr(&xdr, req, &hdr);
2429 encode_create_session(&xdr, args, &hdr);
2430 encode_nops(&hdr);
2431 return 0;
2432 }
2433
2434 /*
2435 * a DESTROY_SESSION request
2436 */
2437 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2438 struct nfs4_session *session)
2439 {
2440 struct xdr_stream xdr;
2441 struct compound_hdr hdr = {
2442 .minorversion = session->clp->cl_mvops->minor_version,
2443 };
2444
2445 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2446 encode_compound_hdr(&xdr, req, &hdr);
2447 encode_destroy_session(&xdr, session, &hdr);
2448 encode_nops(&hdr);
2449 return 0;
2450 }
2451
2452 /*
2453 * a SEQUENCE request
2454 */
2455 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2456 struct nfs4_sequence_args *args)
2457 {
2458 struct xdr_stream xdr;
2459 struct compound_hdr hdr = {
2460 .minorversion = nfs4_xdr_minorversion(args),
2461 };
2462
2463 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2464 encode_compound_hdr(&xdr, req, &hdr);
2465 encode_sequence(&xdr, args, &hdr);
2466 encode_nops(&hdr);
2467 return 0;
2468 }
2469
2470 /*
2471 * a GET_LEASE_TIME request
2472 */
2473 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2474 struct nfs4_get_lease_time_args *args)
2475 {
2476 struct xdr_stream xdr;
2477 struct compound_hdr hdr = {
2478 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2479 };
2480 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2481
2482 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2483 encode_compound_hdr(&xdr, req, &hdr);
2484 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2485 encode_putrootfh(&xdr, &hdr);
2486 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2487 encode_nops(&hdr);
2488 return 0;
2489 }
2490
2491 /*
2492 * a RECLAIM_COMPLETE request
2493 */
2494 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2495 struct nfs41_reclaim_complete_args *args)
2496 {
2497 struct xdr_stream xdr;
2498 struct compound_hdr hdr = {
2499 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2500 };
2501
2502 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2503 encode_compound_hdr(&xdr, req, &hdr);
2504 encode_sequence(&xdr, &args->seq_args, &hdr);
2505 encode_reclaim_complete(&xdr, args, &hdr);
2506 encode_nops(&hdr);
2507 return 0;
2508 }
2509
2510 #endif /* CONFIG_NFS_V4_1 */
2511
2512 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2513 {
2514 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2515 "Remaining buffer length is %tu words.\n",
2516 func, xdr->end - xdr->p);
2517 }
2518
2519 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2520 {
2521 __be32 *p;
2522
2523 p = xdr_inline_decode(xdr, 4);
2524 if (unlikely(!p))
2525 goto out_overflow;
2526 *len = be32_to_cpup(p);
2527 p = xdr_inline_decode(xdr, *len);
2528 if (unlikely(!p))
2529 goto out_overflow;
2530 *string = (char *)p;
2531 return 0;
2532 out_overflow:
2533 print_overflow_msg(__func__, xdr);
2534 return -EIO;
2535 }
2536
2537 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2538 {
2539 __be32 *p;
2540
2541 p = xdr_inline_decode(xdr, 8);
2542 if (unlikely(!p))
2543 goto out_overflow;
2544 hdr->status = be32_to_cpup(p++);
2545 hdr->taglen = be32_to_cpup(p);
2546
2547 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2548 if (unlikely(!p))
2549 goto out_overflow;
2550 hdr->tag = (char *)p;
2551 p += XDR_QUADLEN(hdr->taglen);
2552 hdr->nops = be32_to_cpup(p);
2553 if (unlikely(hdr->nops < 1))
2554 return nfs4_stat_to_errno(hdr->status);
2555 return 0;
2556 out_overflow:
2557 print_overflow_msg(__func__, xdr);
2558 return -EIO;
2559 }
2560
2561 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2562 {
2563 __be32 *p;
2564 uint32_t opnum;
2565 int32_t nfserr;
2566
2567 p = xdr_inline_decode(xdr, 8);
2568 if (unlikely(!p))
2569 goto out_overflow;
2570 opnum = be32_to_cpup(p++);
2571 if (opnum != expected) {
2572 dprintk("nfs: Server returned operation"
2573 " %d but we issued a request for %d\n",
2574 opnum, expected);
2575 return -EIO;
2576 }
2577 nfserr = be32_to_cpup(p);
2578 if (nfserr != NFS_OK)
2579 return nfs4_stat_to_errno(nfserr);
2580 return 0;
2581 out_overflow:
2582 print_overflow_msg(__func__, xdr);
2583 return -EIO;
2584 }
2585
2586 /* Dummy routine */
2587 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2588 {
2589 __be32 *p;
2590 unsigned int strlen;
2591 char *str;
2592
2593 p = xdr_inline_decode(xdr, 12);
2594 if (likely(p))
2595 return decode_opaque_inline(xdr, &strlen, &str);
2596 print_overflow_msg(__func__, xdr);
2597 return -EIO;
2598 }
2599
2600 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2601 {
2602 uint32_t bmlen;
2603 __be32 *p;
2604
2605 p = xdr_inline_decode(xdr, 4);
2606 if (unlikely(!p))
2607 goto out_overflow;
2608 bmlen = be32_to_cpup(p);
2609
2610 bitmap[0] = bitmap[1] = 0;
2611 p = xdr_inline_decode(xdr, (bmlen << 2));
2612 if (unlikely(!p))
2613 goto out_overflow;
2614 if (bmlen > 0) {
2615 bitmap[0] = be32_to_cpup(p++);
2616 if (bmlen > 1)
2617 bitmap[1] = be32_to_cpup(p);
2618 }
2619 return 0;
2620 out_overflow:
2621 print_overflow_msg(__func__, xdr);
2622 return -EIO;
2623 }
2624
2625 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2626 {
2627 __be32 *p;
2628
2629 p = xdr_inline_decode(xdr, 4);
2630 if (unlikely(!p))
2631 goto out_overflow;
2632 *attrlen = be32_to_cpup(p);
2633 *savep = xdr->p;
2634 return 0;
2635 out_overflow:
2636 print_overflow_msg(__func__, xdr);
2637 return -EIO;
2638 }
2639
2640 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2641 {
2642 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2643 decode_attr_bitmap(xdr, bitmask);
2644 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2645 } else
2646 bitmask[0] = bitmask[1] = 0;
2647 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2648 return 0;
2649 }
2650
2651 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2652 {
2653 __be32 *p;
2654 int ret = 0;
2655
2656 *type = 0;
2657 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2658 return -EIO;
2659 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2660 p = xdr_inline_decode(xdr, 4);
2661 if (unlikely(!p))
2662 goto out_overflow;
2663 *type = be32_to_cpup(p);
2664 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2665 dprintk("%s: bad type %d\n", __func__, *type);
2666 return -EIO;
2667 }
2668 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2669 ret = NFS_ATTR_FATTR_TYPE;
2670 }
2671 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2672 return ret;
2673 out_overflow:
2674 print_overflow_msg(__func__, xdr);
2675 return -EIO;
2676 }
2677
2678 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2679 {
2680 __be32 *p;
2681 int ret = 0;
2682
2683 *change = 0;
2684 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2685 return -EIO;
2686 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2687 p = xdr_inline_decode(xdr, 8);
2688 if (unlikely(!p))
2689 goto out_overflow;
2690 xdr_decode_hyper(p, change);
2691 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2692 ret = NFS_ATTR_FATTR_CHANGE;
2693 }
2694 dprintk("%s: change attribute=%Lu\n", __func__,
2695 (unsigned long long)*change);
2696 return ret;
2697 out_overflow:
2698 print_overflow_msg(__func__, xdr);
2699 return -EIO;
2700 }
2701
2702 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2703 {
2704 __be32 *p;
2705 int ret = 0;
2706
2707 *size = 0;
2708 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2709 return -EIO;
2710 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2711 p = xdr_inline_decode(xdr, 8);
2712 if (unlikely(!p))
2713 goto out_overflow;
2714 xdr_decode_hyper(p, size);
2715 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2716 ret = NFS_ATTR_FATTR_SIZE;
2717 }
2718 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2719 return ret;
2720 out_overflow:
2721 print_overflow_msg(__func__, xdr);
2722 return -EIO;
2723 }
2724
2725 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2726 {
2727 __be32 *p;
2728
2729 *res = 0;
2730 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2731 return -EIO;
2732 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2733 p = xdr_inline_decode(xdr, 4);
2734 if (unlikely(!p))
2735 goto out_overflow;
2736 *res = be32_to_cpup(p);
2737 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2738 }
2739 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2740 return 0;
2741 out_overflow:
2742 print_overflow_msg(__func__, xdr);
2743 return -EIO;
2744 }
2745
2746 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2747 {
2748 __be32 *p;
2749
2750 *res = 0;
2751 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2752 return -EIO;
2753 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2754 p = xdr_inline_decode(xdr, 4);
2755 if (unlikely(!p))
2756 goto out_overflow;
2757 *res = be32_to_cpup(p);
2758 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2759 }
2760 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2761 return 0;
2762 out_overflow:
2763 print_overflow_msg(__func__, xdr);
2764 return -EIO;
2765 }
2766
2767 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2768 {
2769 __be32 *p;
2770 int ret = 0;
2771
2772 fsid->major = 0;
2773 fsid->minor = 0;
2774 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2775 return -EIO;
2776 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2777 p = xdr_inline_decode(xdr, 16);
2778 if (unlikely(!p))
2779 goto out_overflow;
2780 p = xdr_decode_hyper(p, &fsid->major);
2781 xdr_decode_hyper(p, &fsid->minor);
2782 bitmap[0] &= ~FATTR4_WORD0_FSID;
2783 ret = NFS_ATTR_FATTR_FSID;
2784 }
2785 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2786 (unsigned long long)fsid->major,
2787 (unsigned long long)fsid->minor);
2788 return ret;
2789 out_overflow:
2790 print_overflow_msg(__func__, xdr);
2791 return -EIO;
2792 }
2793
2794 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2795 {
2796 __be32 *p;
2797
2798 *res = 60;
2799 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2800 return -EIO;
2801 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2802 p = xdr_inline_decode(xdr, 4);
2803 if (unlikely(!p))
2804 goto out_overflow;
2805 *res = be32_to_cpup(p);
2806 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2807 }
2808 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2809 return 0;
2810 out_overflow:
2811 print_overflow_msg(__func__, xdr);
2812 return -EIO;
2813 }
2814
2815 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2816 {
2817 __be32 *p;
2818
2819 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2820 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2821 return -EIO;
2822 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2823 p = xdr_inline_decode(xdr, 4);
2824 if (unlikely(!p))
2825 goto out_overflow;
2826 *res = be32_to_cpup(p);
2827 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2828 }
2829 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2830 return 0;
2831 out_overflow:
2832 print_overflow_msg(__func__, xdr);
2833 return -EIO;
2834 }
2835
2836 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2837 {
2838 __be32 *p;
2839 int ret = 0;
2840
2841 *fileid = 0;
2842 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2843 return -EIO;
2844 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2845 p = xdr_inline_decode(xdr, 8);
2846 if (unlikely(!p))
2847 goto out_overflow;
2848 xdr_decode_hyper(p, fileid);
2849 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2850 ret = NFS_ATTR_FATTR_FILEID;
2851 }
2852 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2853 return ret;
2854 out_overflow:
2855 print_overflow_msg(__func__, xdr);
2856 return -EIO;
2857 }
2858
2859 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2860 {
2861 __be32 *p;
2862 int ret = 0;
2863
2864 *fileid = 0;
2865 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2866 return -EIO;
2867 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2868 p = xdr_inline_decode(xdr, 8);
2869 if (unlikely(!p))
2870 goto out_overflow;
2871 xdr_decode_hyper(p, fileid);
2872 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2873 ret = NFS_ATTR_FATTR_FILEID;
2874 }
2875 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2876 return ret;
2877 out_overflow:
2878 print_overflow_msg(__func__, xdr);
2879 return -EIO;
2880 }
2881
2882 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2883 {
2884 __be32 *p;
2885 int status = 0;
2886
2887 *res = 0;
2888 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2889 return -EIO;
2890 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2891 p = xdr_inline_decode(xdr, 8);
2892 if (unlikely(!p))
2893 goto out_overflow;
2894 xdr_decode_hyper(p, res);
2895 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2896 }
2897 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2898 return status;
2899 out_overflow:
2900 print_overflow_msg(__func__, xdr);
2901 return -EIO;
2902 }
2903
2904 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2905 {
2906 __be32 *p;
2907 int status = 0;
2908
2909 *res = 0;
2910 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2911 return -EIO;
2912 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2913 p = xdr_inline_decode(xdr, 8);
2914 if (unlikely(!p))
2915 goto out_overflow;
2916 xdr_decode_hyper(p, res);
2917 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2918 }
2919 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2920 return status;
2921 out_overflow:
2922 print_overflow_msg(__func__, xdr);
2923 return -EIO;
2924 }
2925
2926 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2927 {
2928 __be32 *p;
2929 int status = 0;
2930
2931 *res = 0;
2932 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2933 return -EIO;
2934 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2935 p = xdr_inline_decode(xdr, 8);
2936 if (unlikely(!p))
2937 goto out_overflow;
2938 xdr_decode_hyper(p, res);
2939 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2940 }
2941 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2942 return status;
2943 out_overflow:
2944 print_overflow_msg(__func__, xdr);
2945 return -EIO;
2946 }
2947
2948 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2949 {
2950 u32 n;
2951 __be32 *p;
2952 int status = 0;
2953
2954 p = xdr_inline_decode(xdr, 4);
2955 if (unlikely(!p))
2956 goto out_overflow;
2957 n = be32_to_cpup(p);
2958 if (n == 0)
2959 goto root_path;
2960 dprintk("path ");
2961 path->ncomponents = 0;
2962 while (path->ncomponents < n) {
2963 struct nfs4_string *component = &path->components[path->ncomponents];
2964 status = decode_opaque_inline(xdr, &component->len, &component->data);
2965 if (unlikely(status != 0))
2966 goto out_eio;
2967 if (path->ncomponents != n)
2968 dprintk("/");
2969 dprintk("%s", component->data);
2970 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2971 path->ncomponents++;
2972 else {
2973 dprintk("cannot parse %d components in path\n", n);
2974 goto out_eio;
2975 }
2976 }
2977 out:
2978 dprintk("\n");
2979 return status;
2980 root_path:
2981 /* a root pathname is sent as a zero component4 */
2982 path->ncomponents = 1;
2983 path->components[0].len=0;
2984 path->components[0].data=NULL;
2985 dprintk("path /\n");
2986 goto out;
2987 out_eio:
2988 dprintk(" status %d", status);
2989 status = -EIO;
2990 goto out;
2991 out_overflow:
2992 print_overflow_msg(__func__, xdr);
2993 return -EIO;
2994 }
2995
2996 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2997 {
2998 int n;
2999 __be32 *p;
3000 int status = -EIO;
3001
3002 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3003 goto out;
3004 status = 0;
3005 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3006 goto out;
3007 dprintk("%s: fsroot ", __func__);
3008 status = decode_pathname(xdr, &res->fs_path);
3009 if (unlikely(status != 0))
3010 goto out;
3011 p = xdr_inline_decode(xdr, 4);
3012 if (unlikely(!p))
3013 goto out_overflow;
3014 n = be32_to_cpup(p);
3015 if (n <= 0)
3016 goto out_eio;
3017 res->nlocations = 0;
3018 while (res->nlocations < n) {
3019 u32 m;
3020 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3021
3022 p = xdr_inline_decode(xdr, 4);
3023 if (unlikely(!p))
3024 goto out_overflow;
3025 m = be32_to_cpup(p);
3026
3027 loc->nservers = 0;
3028 dprintk("%s: servers ", __func__);
3029 while (loc->nservers < m) {
3030 struct nfs4_string *server = &loc->servers[loc->nservers];
3031 status = decode_opaque_inline(xdr, &server->len, &server->data);
3032 if (unlikely(status != 0))
3033 goto out_eio;
3034 dprintk("%s ", server->data);
3035 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3036 loc->nservers++;
3037 else {
3038 unsigned int i;
3039 dprintk("%s: using first %u of %u servers "
3040 "returned for location %u\n",
3041 __func__,
3042 NFS4_FS_LOCATION_MAXSERVERS,
3043 m, res->nlocations);
3044 for (i = loc->nservers; i < m; i++) {
3045 unsigned int len;
3046 char *data;
3047 status = decode_opaque_inline(xdr, &len, &data);
3048 if (unlikely(status != 0))
3049 goto out_eio;
3050 }
3051 }
3052 }
3053 status = decode_pathname(xdr, &loc->rootpath);
3054 if (unlikely(status != 0))
3055 goto out_eio;
3056 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3057 res->nlocations++;
3058 }
3059 if (res->nlocations != 0)
3060 status = NFS_ATTR_FATTR_V4_REFERRAL;
3061 out:
3062 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3063 return status;
3064 out_overflow:
3065 print_overflow_msg(__func__, xdr);
3066 out_eio:
3067 status = -EIO;
3068 goto out;
3069 }
3070
3071 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3072 {
3073 __be32 *p;
3074 int status = 0;
3075
3076 *res = 0;
3077 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3078 return -EIO;
3079 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3080 p = xdr_inline_decode(xdr, 8);
3081 if (unlikely(!p))
3082 goto out_overflow;
3083 xdr_decode_hyper(p, res);
3084 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3085 }
3086 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3087 return status;
3088 out_overflow:
3089 print_overflow_msg(__func__, xdr);
3090 return -EIO;
3091 }
3092
3093 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3094 {
3095 __be32 *p;
3096 int status = 0;
3097
3098 *maxlink = 1;
3099 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3100 return -EIO;
3101 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3102 p = xdr_inline_decode(xdr, 4);
3103 if (unlikely(!p))
3104 goto out_overflow;
3105 *maxlink = be32_to_cpup(p);
3106 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3107 }
3108 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3109 return status;
3110 out_overflow:
3111 print_overflow_msg(__func__, xdr);
3112 return -EIO;
3113 }
3114
3115 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3116 {
3117 __be32 *p;
3118 int status = 0;
3119
3120 *maxname = 1024;
3121 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3122 return -EIO;
3123 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3124 p = xdr_inline_decode(xdr, 4);
3125 if (unlikely(!p))
3126 goto out_overflow;
3127 *maxname = be32_to_cpup(p);
3128 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3129 }
3130 dprintk("%s: maxname=%u\n", __func__, *maxname);
3131 return status;
3132 out_overflow:
3133 print_overflow_msg(__func__, xdr);
3134 return -EIO;
3135 }
3136
3137 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3138 {
3139 __be32 *p;
3140 int status = 0;
3141
3142 *res = 1024;
3143 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3144 return -EIO;
3145 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3146 uint64_t maxread;
3147 p = xdr_inline_decode(xdr, 8);
3148 if (unlikely(!p))
3149 goto out_overflow;
3150 xdr_decode_hyper(p, &maxread);
3151 if (maxread > 0x7FFFFFFF)
3152 maxread = 0x7FFFFFFF;
3153 *res = (uint32_t)maxread;
3154 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3155 }
3156 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3157 return status;
3158 out_overflow:
3159 print_overflow_msg(__func__, xdr);
3160 return -EIO;
3161 }
3162
3163 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3164 {
3165 __be32 *p;
3166 int status = 0;
3167
3168 *res = 1024;
3169 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3170 return -EIO;
3171 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3172 uint64_t maxwrite;
3173 p = xdr_inline_decode(xdr, 8);
3174 if (unlikely(!p))
3175 goto out_overflow;
3176 xdr_decode_hyper(p, &maxwrite);
3177 if (maxwrite > 0x7FFFFFFF)
3178 maxwrite = 0x7FFFFFFF;
3179 *res = (uint32_t)maxwrite;
3180 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3181 }
3182 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3183 return status;
3184 out_overflow:
3185 print_overflow_msg(__func__, xdr);
3186 return -EIO;
3187 }
3188
3189 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3190 {
3191 uint32_t tmp;
3192 __be32 *p;
3193 int ret = 0;
3194
3195 *mode = 0;
3196 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3197 return -EIO;
3198 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3199 p = xdr_inline_decode(xdr, 4);
3200 if (unlikely(!p))
3201 goto out_overflow;
3202 tmp = be32_to_cpup(p);
3203 *mode = tmp & ~S_IFMT;
3204 bitmap[1] &= ~FATTR4_WORD1_MODE;
3205 ret = NFS_ATTR_FATTR_MODE;
3206 }
3207 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3208 return ret;
3209 out_overflow:
3210 print_overflow_msg(__func__, xdr);
3211 return -EIO;
3212 }
3213
3214 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3215 {
3216 __be32 *p;
3217 int ret = 0;
3218
3219 *nlink = 1;
3220 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3221 return -EIO;
3222 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3223 p = xdr_inline_decode(xdr, 4);
3224 if (unlikely(!p))
3225 goto out_overflow;
3226 *nlink = be32_to_cpup(p);
3227 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3228 ret = NFS_ATTR_FATTR_NLINK;
3229 }
3230 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3231 return ret;
3232 out_overflow:
3233 print_overflow_msg(__func__, xdr);
3234 return -EIO;
3235 }
3236
3237 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3238 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3239 {
3240 uint32_t len;
3241 __be32 *p;
3242 int ret = 0;
3243
3244 *uid = -2;
3245 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3246 return -EIO;
3247 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3248 p = xdr_inline_decode(xdr, 4);
3249 if (unlikely(!p))
3250 goto out_overflow;
3251 len = be32_to_cpup(p);
3252 p = xdr_inline_decode(xdr, len);
3253 if (unlikely(!p))
3254 goto out_overflow;
3255 if (!may_sleep) {
3256 /* do nothing */
3257 } else if (len < XDR_MAX_NETOBJ) {
3258 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3259 ret = NFS_ATTR_FATTR_OWNER;
3260 else
3261 dprintk("%s: nfs_map_name_to_uid failed!\n",
3262 __func__);
3263 } else
3264 dprintk("%s: name too long (%u)!\n",
3265 __func__, len);
3266 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3267 }
3268 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3269 return ret;
3270 out_overflow:
3271 print_overflow_msg(__func__, xdr);
3272 return -EIO;
3273 }
3274
3275 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3276 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3277 {
3278 uint32_t len;
3279 __be32 *p;
3280 int ret = 0;
3281
3282 *gid = -2;
3283 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3284 return -EIO;
3285 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3286 p = xdr_inline_decode(xdr, 4);
3287 if (unlikely(!p))
3288 goto out_overflow;
3289 len = be32_to_cpup(p);
3290 p = xdr_inline_decode(xdr, len);
3291 if (unlikely(!p))
3292 goto out_overflow;
3293 if (!may_sleep) {
3294 /* do nothing */
3295 } else if (len < XDR_MAX_NETOBJ) {
3296 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3297 ret = NFS_ATTR_FATTR_GROUP;
3298 else
3299 dprintk("%s: nfs_map_group_to_gid failed!\n",
3300 __func__);
3301 } else
3302 dprintk("%s: name too long (%u)!\n",
3303 __func__, len);
3304 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3305 }
3306 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3307 return ret;
3308 out_overflow:
3309 print_overflow_msg(__func__, xdr);
3310 return -EIO;
3311 }
3312
3313 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3314 {
3315 uint32_t major = 0, minor = 0;
3316 __be32 *p;
3317 int ret = 0;
3318
3319 *rdev = MKDEV(0,0);
3320 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3321 return -EIO;
3322 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3323 dev_t tmp;
3324
3325 p = xdr_inline_decode(xdr, 8);
3326 if (unlikely(!p))
3327 goto out_overflow;
3328 major = be32_to_cpup(p++);
3329 minor = be32_to_cpup(p);
3330 tmp = MKDEV(major, minor);
3331 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3332 *rdev = tmp;
3333 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3334 ret = NFS_ATTR_FATTR_RDEV;
3335 }
3336 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3337 return ret;
3338 out_overflow:
3339 print_overflow_msg(__func__, xdr);
3340 return -EIO;
3341 }
3342
3343 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3344 {
3345 __be32 *p;
3346 int status = 0;
3347
3348 *res = 0;
3349 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3350 return -EIO;
3351 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3352 p = xdr_inline_decode(xdr, 8);
3353 if (unlikely(!p))
3354 goto out_overflow;
3355 xdr_decode_hyper(p, res);
3356 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3357 }
3358 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3359 return status;
3360 out_overflow:
3361 print_overflow_msg(__func__, xdr);
3362 return -EIO;
3363 }
3364
3365 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3366 {
3367 __be32 *p;
3368 int status = 0;
3369
3370 *res = 0;
3371 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3372 return -EIO;
3373 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3374 p = xdr_inline_decode(xdr, 8);
3375 if (unlikely(!p))
3376 goto out_overflow;
3377 xdr_decode_hyper(p, res);
3378 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3379 }
3380 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3381 return status;
3382 out_overflow:
3383 print_overflow_msg(__func__, xdr);
3384 return -EIO;
3385 }
3386
3387 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3388 {
3389 __be32 *p;
3390 int status = 0;
3391
3392 *res = 0;
3393 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3394 return -EIO;
3395 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3396 p = xdr_inline_decode(xdr, 8);
3397 if (unlikely(!p))
3398 goto out_overflow;
3399 xdr_decode_hyper(p, res);
3400 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3401 }
3402 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3403 return status;
3404 out_overflow:
3405 print_overflow_msg(__func__, xdr);
3406 return -EIO;
3407 }
3408
3409 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3410 {
3411 __be32 *p;
3412 int ret = 0;
3413
3414 *used = 0;
3415 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3416 return -EIO;
3417 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3418 p = xdr_inline_decode(xdr, 8);
3419 if (unlikely(!p))
3420 goto out_overflow;
3421 xdr_decode_hyper(p, used);
3422 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3423 ret = NFS_ATTR_FATTR_SPACE_USED;
3424 }
3425 dprintk("%s: space used=%Lu\n", __func__,
3426 (unsigned long long)*used);
3427 return ret;
3428 out_overflow:
3429 print_overflow_msg(__func__, xdr);
3430 return -EIO;
3431 }
3432
3433 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3434 {
3435 __be32 *p;
3436 uint64_t sec;
3437 uint32_t nsec;
3438
3439 p = xdr_inline_decode(xdr, 12);
3440 if (unlikely(!p))
3441 goto out_overflow;
3442 p = xdr_decode_hyper(p, &sec);
3443 nsec = be32_to_cpup(p);
3444 time->tv_sec = (time_t)sec;
3445 time->tv_nsec = (long)nsec;
3446 return 0;
3447 out_overflow:
3448 print_overflow_msg(__func__, xdr);
3449 return -EIO;
3450 }
3451
3452 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3453 {
3454 int status = 0;
3455
3456 time->tv_sec = 0;
3457 time->tv_nsec = 0;
3458 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3459 return -EIO;
3460 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3461 status = decode_attr_time(xdr, time);
3462 if (status == 0)
3463 status = NFS_ATTR_FATTR_ATIME;
3464 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3465 }
3466 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3467 return status;
3468 }
3469
3470 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3471 {
3472 int status = 0;
3473
3474 time->tv_sec = 0;
3475 time->tv_nsec = 0;
3476 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3477 return -EIO;
3478 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3479 status = decode_attr_time(xdr, time);
3480 if (status == 0)
3481 status = NFS_ATTR_FATTR_CTIME;
3482 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3483 }
3484 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3485 return status;
3486 }
3487
3488 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3489 {
3490 int status = 0;
3491
3492 time->tv_sec = 0;
3493 time->tv_nsec = 0;
3494 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3495 return -EIO;
3496 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3497 status = decode_attr_time(xdr, time);
3498 if (status == 0)
3499 status = NFS_ATTR_FATTR_MTIME;
3500 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3501 }
3502 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3503 return status;
3504 }
3505
3506 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3507 {
3508 unsigned int attrwords = XDR_QUADLEN(attrlen);
3509 unsigned int nwords = xdr->p - savep;
3510
3511 if (unlikely(attrwords != nwords)) {
3512 dprintk("%s: server returned incorrect attribute length: "
3513 "%u %c %u\n",
3514 __func__,
3515 attrwords << 2,
3516 (attrwords < nwords) ? '<' : '>',
3517 nwords << 2);
3518 return -EIO;
3519 }
3520 return 0;
3521 }
3522
3523 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3524 {
3525 __be32 *p;
3526
3527 p = xdr_inline_decode(xdr, 20);
3528 if (unlikely(!p))
3529 goto out_overflow;
3530 cinfo->atomic = be32_to_cpup(p++);
3531 p = xdr_decode_hyper(p, &cinfo->before);
3532 xdr_decode_hyper(p, &cinfo->after);
3533 return 0;
3534 out_overflow:
3535 print_overflow_msg(__func__, xdr);
3536 return -EIO;
3537 }
3538
3539 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3540 {
3541 __be32 *p;
3542 uint32_t supp, acc;
3543 int status;
3544
3545 status = decode_op_hdr(xdr, OP_ACCESS);
3546 if (status)
3547 return status;
3548 p = xdr_inline_decode(xdr, 8);
3549 if (unlikely(!p))
3550 goto out_overflow;
3551 supp = be32_to_cpup(p++);
3552 acc = be32_to_cpup(p);
3553 access->supported = supp;
3554 access->access = acc;
3555 return 0;
3556 out_overflow:
3557 print_overflow_msg(__func__, xdr);
3558 return -EIO;
3559 }
3560
3561 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3562 {
3563 __be32 *p;
3564
3565 p = xdr_inline_decode(xdr, len);
3566 if (likely(p)) {
3567 memcpy(buf, p, len);
3568 return 0;
3569 }
3570 print_overflow_msg(__func__, xdr);
3571 return -EIO;
3572 }
3573
3574 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3575 {
3576 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3577 }
3578
3579 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3580 {
3581 int status;
3582
3583 status = decode_op_hdr(xdr, OP_CLOSE);
3584 if (status != -EIO)
3585 nfs_increment_open_seqid(status, res->seqid);
3586 if (!status)
3587 status = decode_stateid(xdr, &res->stateid);
3588 return status;
3589 }
3590
3591 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3592 {
3593 return decode_opaque_fixed(xdr, verifier, 8);
3594 }
3595
3596 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3597 {
3598 int status;
3599
3600 status = decode_op_hdr(xdr, OP_COMMIT);
3601 if (!status)
3602 status = decode_verifier(xdr, res->verf->verifier);
3603 return status;
3604 }
3605
3606 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3607 {
3608 __be32 *p;
3609 uint32_t bmlen;
3610 int status;
3611
3612 status = decode_op_hdr(xdr, OP_CREATE);
3613 if (status)
3614 return status;
3615 if ((status = decode_change_info(xdr, cinfo)))
3616 return status;
3617 p = xdr_inline_decode(xdr, 4);
3618 if (unlikely(!p))
3619 goto out_overflow;
3620 bmlen = be32_to_cpup(p);
3621 p = xdr_inline_decode(xdr, bmlen << 2);
3622 if (likely(p))
3623 return 0;
3624 out_overflow:
3625 print_overflow_msg(__func__, xdr);
3626 return -EIO;
3627 }
3628
3629 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3630 {
3631 __be32 *savep;
3632 uint32_t attrlen, bitmap[2] = {0};
3633 int status;
3634
3635 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3636 goto xdr_error;
3637 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3638 goto xdr_error;
3639 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3640 goto xdr_error;
3641 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3642 goto xdr_error;
3643 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3644 goto xdr_error;
3645 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3646 goto xdr_error;
3647 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3648 goto xdr_error;
3649 status = verify_attr_len(xdr, savep, attrlen);
3650 xdr_error:
3651 dprintk("%s: xdr returned %d!\n", __func__, -status);
3652 return status;
3653 }
3654
3655 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3656 {
3657 __be32 *savep;
3658 uint32_t attrlen, bitmap[2] = {0};
3659 int status;
3660
3661 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3662 goto xdr_error;
3663 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3664 goto xdr_error;
3665 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3666 goto xdr_error;
3667
3668 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3669 goto xdr_error;
3670 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3671 goto xdr_error;
3672 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3673 goto xdr_error;
3674 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3675 goto xdr_error;
3676 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3677 goto xdr_error;
3678 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3679 goto xdr_error;
3680
3681 status = verify_attr_len(xdr, savep, attrlen);
3682 xdr_error:
3683 dprintk("%s: xdr returned %d!\n", __func__, -status);
3684 return status;
3685 }
3686
3687 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3688 {
3689 __be32 *savep;
3690 uint32_t attrlen, bitmap[2] = {0};
3691 int status;
3692
3693 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3694 goto xdr_error;
3695 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3696 goto xdr_error;
3697 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3698 goto xdr_error;
3699
3700 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3701 goto xdr_error;
3702 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3703 goto xdr_error;
3704
3705 status = verify_attr_len(xdr, savep, attrlen);
3706 xdr_error:
3707 dprintk("%s: xdr returned %d!\n", __func__, -status);
3708 return status;
3709 }
3710
3711 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3712 const struct nfs_server *server, int may_sleep)
3713 {
3714 __be32 *savep;
3715 uint32_t attrlen,
3716 bitmap[2] = {0},
3717 type;
3718 int status;
3719 umode_t fmode = 0;
3720 uint64_t fileid;
3721
3722 status = decode_op_hdr(xdr, OP_GETATTR);
3723 if (status < 0)
3724 goto xdr_error;
3725
3726 status = decode_attr_bitmap(xdr, bitmap);
3727 if (status < 0)
3728 goto xdr_error;
3729
3730 status = decode_attr_length(xdr, &attrlen, &savep);
3731 if (status < 0)
3732 goto xdr_error;
3733
3734
3735 status = decode_attr_type(xdr, bitmap, &type);
3736 if (status < 0)
3737 goto xdr_error;
3738 fattr->mode = 0;
3739 if (status != 0) {
3740 fattr->mode |= nfs_type2fmt[type];
3741 fattr->valid |= status;
3742 }
3743
3744 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3745 if (status < 0)
3746 goto xdr_error;
3747 fattr->valid |= status;
3748
3749 status = decode_attr_size(xdr, bitmap, &fattr->size);
3750 if (status < 0)
3751 goto xdr_error;
3752 fattr->valid |= status;
3753
3754 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3755 if (status < 0)
3756 goto xdr_error;
3757 fattr->valid |= status;
3758
3759 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3760 if (status < 0)
3761 goto xdr_error;
3762 fattr->valid |= status;
3763
3764 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3765 struct nfs4_fs_locations,
3766 fattr));
3767 if (status < 0)
3768 goto xdr_error;
3769 fattr->valid |= status;
3770
3771 status = decode_attr_mode(xdr, bitmap, &fmode);
3772 if (status < 0)
3773 goto xdr_error;
3774 if (status != 0) {
3775 fattr->mode |= fmode;
3776 fattr->valid |= status;
3777 }
3778
3779 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3780 if (status < 0)
3781 goto xdr_error;
3782 fattr->valid |= status;
3783
3784 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3785 &fattr->uid, may_sleep);
3786 if (status < 0)
3787 goto xdr_error;
3788 fattr->valid |= status;
3789
3790 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3791 &fattr->gid, may_sleep);
3792 if (status < 0)
3793 goto xdr_error;
3794 fattr->valid |= status;
3795
3796 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3797 if (status < 0)
3798 goto xdr_error;
3799 fattr->valid |= status;
3800
3801 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3802 if (status < 0)
3803 goto xdr_error;
3804 fattr->valid |= status;
3805
3806 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3807 if (status < 0)
3808 goto xdr_error;
3809 fattr->valid |= status;
3810
3811 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3812 if (status < 0)
3813 goto xdr_error;
3814 fattr->valid |= status;
3815
3816 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3817 if (status < 0)
3818 goto xdr_error;
3819 fattr->valid |= status;
3820
3821 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3822 if (status < 0)
3823 goto xdr_error;
3824 if (status != 0 && !(fattr->valid & status)) {
3825 fattr->fileid = fileid;
3826 fattr->valid |= status;
3827 }
3828
3829 status = verify_attr_len(xdr, savep, attrlen);
3830 xdr_error:
3831 dprintk("%s: xdr returned %d\n", __func__, -status);
3832 return status;
3833 }
3834
3835
3836 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3837 {
3838 __be32 *savep;
3839 uint32_t attrlen, bitmap[2];
3840 int status;
3841
3842 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3843 goto xdr_error;
3844 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3845 goto xdr_error;
3846 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3847 goto xdr_error;
3848
3849 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3850
3851 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3852 goto xdr_error;
3853 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3854 goto xdr_error;
3855 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3856 goto xdr_error;
3857 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3858 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3859 goto xdr_error;
3860 fsinfo->wtpref = fsinfo->wtmax;
3861
3862 status = verify_attr_len(xdr, savep, attrlen);
3863 xdr_error:
3864 dprintk("%s: xdr returned %d!\n", __func__, -status);
3865 return status;
3866 }
3867
3868 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3869 {
3870 __be32 *p;
3871 uint32_t len;
3872 int status;
3873
3874 /* Zero handle first to allow comparisons */
3875 memset(fh, 0, sizeof(*fh));
3876
3877 status = decode_op_hdr(xdr, OP_GETFH);
3878 if (status)
3879 return status;
3880
3881 p = xdr_inline_decode(xdr, 4);
3882 if (unlikely(!p))
3883 goto out_overflow;
3884 len = be32_to_cpup(p);
3885 if (len > NFS4_FHSIZE)
3886 return -EIO;
3887 fh->size = len;
3888 p = xdr_inline_decode(xdr, len);
3889 if (unlikely(!p))
3890 goto out_overflow;
3891 memcpy(fh->data, p, len);
3892 return 0;
3893 out_overflow:
3894 print_overflow_msg(__func__, xdr);
3895 return -EIO;
3896 }
3897
3898 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3899 {
3900 int status;
3901
3902 status = decode_op_hdr(xdr, OP_LINK);
3903 if (status)
3904 return status;
3905 return decode_change_info(xdr, cinfo);
3906 }
3907
3908 /*
3909 * We create the owner, so we know a proper owner.id length is 4.
3910 */
3911 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3912 {
3913 uint64_t offset, length, clientid;
3914 __be32 *p;
3915 uint32_t namelen, type;
3916
3917 p = xdr_inline_decode(xdr, 32);
3918 if (unlikely(!p))
3919 goto out_overflow;
3920 p = xdr_decode_hyper(p, &offset);
3921 p = xdr_decode_hyper(p, &length);
3922 type = be32_to_cpup(p++);
3923 if (fl != NULL) {
3924 fl->fl_start = (loff_t)offset;
3925 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3926 if (length == ~(uint64_t)0)
3927 fl->fl_end = OFFSET_MAX;
3928 fl->fl_type = F_WRLCK;
3929 if (type & 1)
3930 fl->fl_type = F_RDLCK;
3931 fl->fl_pid = 0;
3932 }
3933 p = xdr_decode_hyper(p, &clientid);
3934 namelen = be32_to_cpup(p);
3935 p = xdr_inline_decode(xdr, namelen);
3936 if (likely(p))
3937 return -NFS4ERR_DENIED;
3938 out_overflow:
3939 print_overflow_msg(__func__, xdr);
3940 return -EIO;
3941 }
3942
3943 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3944 {
3945 int status;
3946
3947 status = decode_op_hdr(xdr, OP_LOCK);
3948 if (status == -EIO)
3949 goto out;
3950 if (status == 0) {
3951 status = decode_stateid(xdr, &res->stateid);
3952 if (unlikely(status))
3953 goto out;
3954 } else if (status == -NFS4ERR_DENIED)
3955 status = decode_lock_denied(xdr, NULL);
3956 if (res->open_seqid != NULL)
3957 nfs_increment_open_seqid(status, res->open_seqid);
3958 nfs_increment_lock_seqid(status, res->lock_seqid);
3959 out:
3960 return status;
3961 }
3962
3963 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3964 {
3965 int status;
3966 status = decode_op_hdr(xdr, OP_LOCKT);
3967 if (status == -NFS4ERR_DENIED)
3968 return decode_lock_denied(xdr, res->denied);
3969 return status;
3970 }
3971
3972 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3973 {
3974 int status;
3975
3976 status = decode_op_hdr(xdr, OP_LOCKU);
3977 if (status != -EIO)
3978 nfs_increment_lock_seqid(status, res->seqid);
3979 if (status == 0)
3980 status = decode_stateid(xdr, &res->stateid);
3981 return status;
3982 }
3983
3984 static int decode_lookup(struct xdr_stream *xdr)
3985 {
3986 return decode_op_hdr(xdr, OP_LOOKUP);
3987 }
3988
3989 /* This is too sick! */
3990 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3991 {
3992 __be32 *p;
3993 uint32_t limit_type, nblocks, blocksize;
3994
3995 p = xdr_inline_decode(xdr, 12);
3996 if (unlikely(!p))
3997 goto out_overflow;
3998 limit_type = be32_to_cpup(p++);
3999 switch (limit_type) {
4000 case 1:
4001 xdr_decode_hyper(p, maxsize);
4002 break;
4003 case 2:
4004 nblocks = be32_to_cpup(p++);
4005 blocksize = be32_to_cpup(p);
4006 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4007 }
4008 return 0;
4009 out_overflow:
4010 print_overflow_msg(__func__, xdr);
4011 return -EIO;
4012 }
4013
4014 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4015 {
4016 __be32 *p;
4017 uint32_t delegation_type;
4018 int status;
4019
4020 p = xdr_inline_decode(xdr, 4);
4021 if (unlikely(!p))
4022 goto out_overflow;
4023 delegation_type = be32_to_cpup(p);
4024 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4025 res->delegation_type = 0;
4026 return 0;
4027 }
4028 status = decode_stateid(xdr, &res->delegation);
4029 if (unlikely(status))
4030 return status;
4031 p = xdr_inline_decode(xdr, 4);
4032 if (unlikely(!p))
4033 goto out_overflow;
4034 res->do_recall = be32_to_cpup(p);
4035
4036 switch (delegation_type) {
4037 case NFS4_OPEN_DELEGATE_READ:
4038 res->delegation_type = FMODE_READ;
4039 break;
4040 case NFS4_OPEN_DELEGATE_WRITE:
4041 res->delegation_type = FMODE_WRITE|FMODE_READ;
4042 if (decode_space_limit(xdr, &res->maxsize) < 0)
4043 return -EIO;
4044 }
4045 return decode_ace(xdr, NULL, res->server->nfs_client);
4046 out_overflow:
4047 print_overflow_msg(__func__, xdr);
4048 return -EIO;
4049 }
4050
4051 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4052 {
4053 __be32 *p;
4054 uint32_t savewords, bmlen, i;
4055 int status;
4056
4057 status = decode_op_hdr(xdr, OP_OPEN);
4058 if (status != -EIO)
4059 nfs_increment_open_seqid(status, res->seqid);
4060 if (!status)
4061 status = decode_stateid(xdr, &res->stateid);
4062 if (unlikely(status))
4063 return status;
4064
4065 decode_change_info(xdr, &res->cinfo);
4066
4067 p = xdr_inline_decode(xdr, 8);
4068 if (unlikely(!p))
4069 goto out_overflow;
4070 res->rflags = be32_to_cpup(p++);
4071 bmlen = be32_to_cpup(p);
4072 if (bmlen > 10)
4073 goto xdr_error;
4074
4075 p = xdr_inline_decode(xdr, bmlen << 2);
4076 if (unlikely(!p))
4077 goto out_overflow;
4078 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4079 for (i = 0; i < savewords; ++i)
4080 res->attrset[i] = be32_to_cpup(p++);
4081 for (; i < NFS4_BITMAP_SIZE; i++)
4082 res->attrset[i] = 0;
4083
4084 return decode_delegation(xdr, res);
4085 xdr_error:
4086 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4087 return -EIO;
4088 out_overflow:
4089 print_overflow_msg(__func__, xdr);
4090 return -EIO;
4091 }
4092
4093 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4094 {
4095 int status;
4096
4097 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4098 if (status != -EIO)
4099 nfs_increment_open_seqid(status, res->seqid);
4100 if (!status)
4101 status = decode_stateid(xdr, &res->stateid);
4102 return status;
4103 }
4104
4105 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4106 {
4107 int status;
4108
4109 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4110 if (status != -EIO)
4111 nfs_increment_open_seqid(status, res->seqid);
4112 if (!status)
4113 status = decode_stateid(xdr, &res->stateid);
4114 return status;
4115 }
4116
4117 static int decode_putfh(struct xdr_stream *xdr)
4118 {
4119 return decode_op_hdr(xdr, OP_PUTFH);
4120 }
4121
4122 static int decode_putrootfh(struct xdr_stream *xdr)
4123 {
4124 return decode_op_hdr(xdr, OP_PUTROOTFH);
4125 }
4126
4127 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4128 {
4129 struct kvec *iov = req->rq_rcv_buf.head;
4130 __be32 *p;
4131 uint32_t count, eof, recvd, hdrlen;
4132 int status;
4133
4134 status = decode_op_hdr(xdr, OP_READ);
4135 if (status)
4136 return status;
4137 p = xdr_inline_decode(xdr, 8);
4138 if (unlikely(!p))
4139 goto out_overflow;
4140 eof = be32_to_cpup(p++);
4141 count = be32_to_cpup(p);
4142 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4143 recvd = req->rq_rcv_buf.len - hdrlen;
4144 if (count > recvd) {
4145 dprintk("NFS: server cheating in read reply: "
4146 "count %u > recvd %u\n", count, recvd);
4147 count = recvd;
4148 eof = 0;
4149 }
4150 xdr_read_pages(xdr, count);
4151 res->eof = eof;
4152 res->count = count;
4153 return 0;
4154 out_overflow:
4155 print_overflow_msg(__func__, xdr);
4156 return -EIO;
4157 }
4158
4159 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4160 {
4161 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4162 struct page *page = *rcvbuf->pages;
4163 struct kvec *iov = rcvbuf->head;
4164 size_t hdrlen;
4165 u32 recvd, pglen = rcvbuf->page_len;
4166 __be32 *end, *entry, *p, *kaddr;
4167 unsigned int nr = 0;
4168 int status;
4169
4170 status = decode_op_hdr(xdr, OP_READDIR);
4171 if (!status)
4172 status = decode_verifier(xdr, readdir->verifier.data);
4173 if (unlikely(status))
4174 return status;
4175 dprintk("%s: verifier = %08x:%08x\n",
4176 __func__,
4177 ((u32 *)readdir->verifier.data)[0],
4178 ((u32 *)readdir->verifier.data)[1]);
4179
4180
4181 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4182 recvd = rcvbuf->len - hdrlen;
4183 if (pglen > recvd)
4184 pglen = recvd;
4185 xdr_read_pages(xdr, pglen);
4186
4187 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4188 kaddr = p = kmap_atomic(page, KM_USER0);
4189 end = p + ((pglen + readdir->pgbase) >> 2);
4190 entry = p;
4191
4192 /* Make sure the packet actually has a value_follows and EOF entry */
4193 if ((entry + 1) > end)
4194 goto short_pkt;
4195
4196 for (; *p++; nr++) {
4197 u32 len, attrlen, xlen;
4198 if (end - p < 3)
4199 goto short_pkt;
4200 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4201 p += 2; /* cookie */
4202 len = ntohl(*p++); /* filename length */
4203 if (len > NFS4_MAXNAMLEN) {
4204 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4205 len);
4206 goto err_unmap;
4207 }
4208 xlen = XDR_QUADLEN(len);
4209 if (end - p < xlen + 1)
4210 goto short_pkt;
4211 dprintk("filename = %*s\n", len, (char *)p);
4212 p += xlen;
4213 len = ntohl(*p++); /* bitmap length */
4214 if (end - p < len + 1)
4215 goto short_pkt;
4216 p += len;
4217 attrlen = XDR_QUADLEN(ntohl(*p++));
4218 if (end - p < attrlen + 2)
4219 goto short_pkt;
4220 p += attrlen; /* attributes */
4221 entry = p;
4222 }
4223 /*
4224 * Apparently some server sends responses that are a valid size, but
4225 * contain no entries, and have value_follows==0 and EOF==0. For
4226 * those, just set the EOF marker.
4227 */
4228 if (!nr && entry[1] == 0) {
4229 dprintk("NFS: readdir reply truncated!\n");
4230 entry[1] = 1;
4231 }
4232 out:
4233 kunmap_atomic(kaddr, KM_USER0);
4234 return 0;
4235 short_pkt:
4236 /*
4237 * When we get a short packet there are 2 possibilities. We can
4238 * return an error, or fix up the response to look like a valid
4239 * response and return what we have so far. If there are no
4240 * entries and the packet was short, then return -EIO. If there
4241 * are valid entries in the response, return them and pretend that
4242 * the call was successful, but incomplete. The caller can retry the
4243 * readdir starting at the last cookie.
4244 */
4245 dprintk("%s: short packet at entry %d\n", __func__, nr);
4246 entry[0] = entry[1] = 0;
4247 if (nr)
4248 goto out;
4249 err_unmap:
4250 kunmap_atomic(kaddr, KM_USER0);
4251 return -errno_NFSERR_IO;
4252 }
4253
4254 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4255 {
4256 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4257 struct kvec *iov = rcvbuf->head;
4258 size_t hdrlen;
4259 u32 len, recvd;
4260 __be32 *p;
4261 char *kaddr;
4262 int status;
4263
4264 status = decode_op_hdr(xdr, OP_READLINK);
4265 if (status)
4266 return status;
4267
4268 /* Convert length of symlink */
4269 p = xdr_inline_decode(xdr, 4);
4270 if (unlikely(!p))
4271 goto out_overflow;
4272 len = be32_to_cpup(p);
4273 if (len >= rcvbuf->page_len || len <= 0) {
4274 dprintk("nfs: server returned giant symlink!\n");
4275 return -ENAMETOOLONG;
4276 }
4277 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4278 recvd = req->rq_rcv_buf.len - hdrlen;
4279 if (recvd < len) {
4280 dprintk("NFS: server cheating in readlink reply: "
4281 "count %u > recvd %u\n", len, recvd);
4282 return -EIO;
4283 }
4284 xdr_read_pages(xdr, len);
4285 /*
4286 * The XDR encode routine has set things up so that
4287 * the link text will be copied directly into the
4288 * buffer. We just have to do overflow-checking,
4289 * and and null-terminate the text (the VFS expects
4290 * null-termination).
4291 */
4292 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4293 kaddr[len+rcvbuf->page_base] = '\0';
4294 kunmap_atomic(kaddr, KM_USER0);
4295 return 0;
4296 out_overflow:
4297 print_overflow_msg(__func__, xdr);
4298 return -EIO;
4299 }
4300
4301 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4302 {
4303 int status;
4304
4305 status = decode_op_hdr(xdr, OP_REMOVE);
4306 if (status)
4307 goto out;
4308 status = decode_change_info(xdr, cinfo);
4309 out:
4310 return status;
4311 }
4312
4313 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4314 struct nfs4_change_info *new_cinfo)
4315 {
4316 int status;
4317
4318 status = decode_op_hdr(xdr, OP_RENAME);
4319 if (status)
4320 goto out;
4321 if ((status = decode_change_info(xdr, old_cinfo)))
4322 goto out;
4323 status = decode_change_info(xdr, new_cinfo);
4324 out:
4325 return status;
4326 }
4327
4328 static int decode_renew(struct xdr_stream *xdr)
4329 {
4330 return decode_op_hdr(xdr, OP_RENEW);
4331 }
4332
4333 static int
4334 decode_restorefh(struct xdr_stream *xdr)
4335 {
4336 return decode_op_hdr(xdr, OP_RESTOREFH);
4337 }
4338
4339 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4340 size_t *acl_len)
4341 {
4342 __be32 *savep;
4343 uint32_t attrlen,
4344 bitmap[2] = {0};
4345 struct kvec *iov = req->rq_rcv_buf.head;
4346 int status;
4347
4348 *acl_len = 0;
4349 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4350 goto out;
4351 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4352 goto out;
4353 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4354 goto out;
4355
4356 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4357 return -EIO;
4358 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4359 size_t hdrlen;
4360 u32 recvd;
4361
4362 /* We ignore &savep and don't do consistency checks on
4363 * the attr length. Let userspace figure it out.... */
4364 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4365 recvd = req->rq_rcv_buf.len - hdrlen;
4366 if (attrlen > recvd) {
4367 dprintk("NFS: server cheating in getattr"
4368 " acl reply: attrlen %u > recvd %u\n",
4369 attrlen, recvd);
4370 return -EINVAL;
4371 }
4372 xdr_read_pages(xdr, attrlen);
4373 *acl_len = attrlen;
4374 } else
4375 status = -EOPNOTSUPP;
4376
4377 out:
4378 return status;
4379 }
4380
4381 static int
4382 decode_savefh(struct xdr_stream *xdr)
4383 {
4384 return decode_op_hdr(xdr, OP_SAVEFH);
4385 }
4386
4387 static int decode_setattr(struct xdr_stream *xdr)
4388 {
4389 __be32 *p;
4390 uint32_t bmlen;
4391 int status;
4392
4393 status = decode_op_hdr(xdr, OP_SETATTR);
4394 if (status)
4395 return status;
4396 p = xdr_inline_decode(xdr, 4);
4397 if (unlikely(!p))
4398 goto out_overflow;
4399 bmlen = be32_to_cpup(p);
4400 p = xdr_inline_decode(xdr, bmlen << 2);
4401 if (likely(p))
4402 return 0;
4403 out_overflow:
4404 print_overflow_msg(__func__, xdr);
4405 return -EIO;
4406 }
4407
4408 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4409 {
4410 __be32 *p;
4411 uint32_t opnum;
4412 int32_t nfserr;
4413
4414 p = xdr_inline_decode(xdr, 8);
4415 if (unlikely(!p))
4416 goto out_overflow;
4417 opnum = be32_to_cpup(p++);
4418 if (opnum != OP_SETCLIENTID) {
4419 dprintk("nfs: decode_setclientid: Server returned operation"
4420 " %d\n", opnum);
4421 return -EIO;
4422 }
4423 nfserr = be32_to_cpup(p);
4424 if (nfserr == NFS_OK) {
4425 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4426 if (unlikely(!p))
4427 goto out_overflow;
4428 p = xdr_decode_hyper(p, &res->clientid);
4429 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4430 } else if (nfserr == NFSERR_CLID_INUSE) {
4431 uint32_t len;
4432
4433 /* skip netid string */
4434 p = xdr_inline_decode(xdr, 4);
4435 if (unlikely(!p))
4436 goto out_overflow;
4437 len = be32_to_cpup(p);
4438 p = xdr_inline_decode(xdr, len);
4439 if (unlikely(!p))
4440 goto out_overflow;
4441
4442 /* skip uaddr string */
4443 p = xdr_inline_decode(xdr, 4);
4444 if (unlikely(!p))
4445 goto out_overflow;
4446 len = be32_to_cpup(p);
4447 p = xdr_inline_decode(xdr, len);
4448 if (unlikely(!p))
4449 goto out_overflow;
4450 return -NFSERR_CLID_INUSE;
4451 } else
4452 return nfs4_stat_to_errno(nfserr);
4453
4454 return 0;
4455 out_overflow:
4456 print_overflow_msg(__func__, xdr);
4457 return -EIO;
4458 }
4459
4460 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4461 {
4462 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4463 }
4464
4465 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4466 {
4467 __be32 *p;
4468 int status;
4469
4470 status = decode_op_hdr(xdr, OP_WRITE);
4471 if (status)
4472 return status;
4473
4474 p = xdr_inline_decode(xdr, 16);
4475 if (unlikely(!p))
4476 goto out_overflow;
4477 res->count = be32_to_cpup(p++);
4478 res->verf->committed = be32_to_cpup(p++);
4479 memcpy(res->verf->verifier, p, 8);
4480 return 0;
4481 out_overflow:
4482 print_overflow_msg(__func__, xdr);
4483 return -EIO;
4484 }
4485
4486 static int decode_delegreturn(struct xdr_stream *xdr)
4487 {
4488 return decode_op_hdr(xdr, OP_DELEGRETURN);
4489 }
4490
4491 #if defined(CONFIG_NFS_V4_1)
4492 static int decode_exchange_id(struct xdr_stream *xdr,
4493 struct nfs41_exchange_id_res *res)
4494 {
4495 __be32 *p;
4496 uint32_t dummy;
4497 char *dummy_str;
4498 int status;
4499 struct nfs_client *clp = res->client;
4500
4501 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4502 if (status)
4503 return status;
4504
4505 p = xdr_inline_decode(xdr, 8);
4506 if (unlikely(!p))
4507 goto out_overflow;
4508 xdr_decode_hyper(p, &clp->cl_ex_clid);
4509 p = xdr_inline_decode(xdr, 12);
4510 if (unlikely(!p))
4511 goto out_overflow;
4512 clp->cl_seqid = be32_to_cpup(p++);
4513 clp->cl_exchange_flags = be32_to_cpup(p++);
4514
4515 /* We ask for SP4_NONE */
4516 dummy = be32_to_cpup(p);
4517 if (dummy != SP4_NONE)
4518 return -EIO;
4519
4520 /* Throw away minor_id */
4521 p = xdr_inline_decode(xdr, 8);
4522 if (unlikely(!p))
4523 goto out_overflow;
4524
4525 /* Throw away Major id */
4526 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4527 if (unlikely(status))
4528 return status;
4529
4530 /* Throw away server_scope */
4531 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4532 if (unlikely(status))
4533 return status;
4534
4535 /* Throw away Implementation id array */
4536 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4537 if (unlikely(status))
4538 return status;
4539
4540 return 0;
4541 out_overflow:
4542 print_overflow_msg(__func__, xdr);
4543 return -EIO;
4544 }
4545
4546 static int decode_chan_attrs(struct xdr_stream *xdr,
4547 struct nfs4_channel_attrs *attrs)
4548 {
4549 __be32 *p;
4550 u32 nr_attrs;
4551
4552 p = xdr_inline_decode(xdr, 28);
4553 if (unlikely(!p))
4554 goto out_overflow;
4555 attrs->headerpadsz = be32_to_cpup(p++);
4556 attrs->max_rqst_sz = be32_to_cpup(p++);
4557 attrs->max_resp_sz = be32_to_cpup(p++);
4558 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4559 attrs->max_ops = be32_to_cpup(p++);
4560 attrs->max_reqs = be32_to_cpup(p++);
4561 nr_attrs = be32_to_cpup(p);
4562 if (unlikely(nr_attrs > 1)) {
4563 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4564 __func__, nr_attrs);
4565 return -EINVAL;
4566 }
4567 if (nr_attrs == 1) {
4568 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4569 if (unlikely(!p))
4570 goto out_overflow;
4571 }
4572 return 0;
4573 out_overflow:
4574 print_overflow_msg(__func__, xdr);
4575 return -EIO;
4576 }
4577
4578 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4579 {
4580 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4581 }
4582
4583 static int decode_create_session(struct xdr_stream *xdr,
4584 struct nfs41_create_session_res *res)
4585 {
4586 __be32 *p;
4587 int status;
4588 struct nfs_client *clp = res->client;
4589 struct nfs4_session *session = clp->cl_session;
4590
4591 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4592 if (!status)
4593 status = decode_sessionid(xdr, &session->sess_id);
4594 if (unlikely(status))
4595 return status;
4596
4597 /* seqid, flags */
4598 p = xdr_inline_decode(xdr, 8);
4599 if (unlikely(!p))
4600 goto out_overflow;
4601 clp->cl_seqid = be32_to_cpup(p++);
4602 session->flags = be32_to_cpup(p);
4603
4604 /* Channel attributes */
4605 status = decode_chan_attrs(xdr, &session->fc_attrs);
4606 if (!status)
4607 status = decode_chan_attrs(xdr, &session->bc_attrs);
4608 return status;
4609 out_overflow:
4610 print_overflow_msg(__func__, xdr);
4611 return -EIO;
4612 }
4613
4614 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4615 {
4616 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4617 }
4618
4619 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4620 {
4621 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4622 }
4623 #endif /* CONFIG_NFS_V4_1 */
4624
4625 static int decode_sequence(struct xdr_stream *xdr,
4626 struct nfs4_sequence_res *res,
4627 struct rpc_rqst *rqstp)
4628 {
4629 #if defined(CONFIG_NFS_V4_1)
4630 struct nfs4_slot *slot;
4631 struct nfs4_sessionid id;
4632 u32 dummy;
4633 int status;
4634 __be32 *p;
4635
4636 if (!res->sr_session)
4637 return 0;
4638
4639 status = decode_op_hdr(xdr, OP_SEQUENCE);
4640 if (!status)
4641 status = decode_sessionid(xdr, &id);
4642 if (unlikely(status))
4643 goto out_err;
4644
4645 /*
4646 * If the server returns different values for sessionID, slotID or
4647 * sequence number, the server is looney tunes.
4648 */
4649 status = -EREMOTEIO;
4650
4651 if (memcmp(id.data, res->sr_session->sess_id.data,
4652 NFS4_MAX_SESSIONID_LEN)) {
4653 dprintk("%s Invalid session id\n", __func__);
4654 goto out_err;
4655 }
4656
4657 p = xdr_inline_decode(xdr, 20);
4658 if (unlikely(!p))
4659 goto out_overflow;
4660
4661 /* seqid */
4662 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4663 dummy = be32_to_cpup(p++);
4664 if (dummy != slot->seq_nr) {
4665 dprintk("%s Invalid sequence number\n", __func__);
4666 goto out_err;
4667 }
4668 /* slot id */
4669 dummy = be32_to_cpup(p++);
4670 if (dummy != res->sr_slotid) {
4671 dprintk("%s Invalid slot id\n", __func__);
4672 goto out_err;
4673 }
4674 /* highest slot id - currently not processed */
4675 dummy = be32_to_cpup(p++);
4676 /* target highest slot id - currently not processed */
4677 dummy = be32_to_cpup(p++);
4678 /* result flags */
4679 res->sr_status_flags = be32_to_cpup(p);
4680 status = 0;
4681 out_err:
4682 res->sr_status = status;
4683 return status;
4684 out_overflow:
4685 print_overflow_msg(__func__, xdr);
4686 status = -EIO;
4687 goto out_err;
4688 #else /* CONFIG_NFS_V4_1 */
4689 return 0;
4690 #endif /* CONFIG_NFS_V4_1 */
4691 }
4692
4693 /*
4694 * END OF "GENERIC" DECODE ROUTINES.
4695 */
4696
4697 /*
4698 * Decode OPEN_DOWNGRADE response
4699 */
4700 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4701 {
4702 struct xdr_stream xdr;
4703 struct compound_hdr hdr;
4704 int status;
4705
4706 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4707 status = decode_compound_hdr(&xdr, &hdr);
4708 if (status)
4709 goto out;
4710 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4711 if (status)
4712 goto out;
4713 status = decode_putfh(&xdr);
4714 if (status)
4715 goto out;
4716 status = decode_open_downgrade(&xdr, res);
4717 if (status != 0)
4718 goto out;
4719 decode_getfattr(&xdr, res->fattr, res->server,
4720 !RPC_IS_ASYNC(rqstp->rq_task));
4721 out:
4722 return status;
4723 }
4724
4725 /*
4726 * Decode ACCESS response
4727 */
4728 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4729 {
4730 struct xdr_stream xdr;
4731 struct compound_hdr hdr;
4732 int status;
4733
4734 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4735 status = decode_compound_hdr(&xdr, &hdr);
4736 if (status)
4737 goto out;
4738 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4739 if (status)
4740 goto out;
4741 status = decode_putfh(&xdr);
4742 if (status != 0)
4743 goto out;
4744 status = decode_access(&xdr, res);
4745 if (status != 0)
4746 goto out;
4747 decode_getfattr(&xdr, res->fattr, res->server,
4748 !RPC_IS_ASYNC(rqstp->rq_task));
4749 out:
4750 return status;
4751 }
4752
4753 /*
4754 * Decode LOOKUP response
4755 */
4756 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4757 {
4758 struct xdr_stream xdr;
4759 struct compound_hdr hdr;
4760 int status;
4761
4762 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4763 status = decode_compound_hdr(&xdr, &hdr);
4764 if (status)
4765 goto out;
4766 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4767 if (status)
4768 goto out;
4769 if ((status = decode_putfh(&xdr)) != 0)
4770 goto out;
4771 if ((status = decode_lookup(&xdr)) != 0)
4772 goto out;
4773 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4774 goto out;
4775 status = decode_getfattr(&xdr, res->fattr, res->server
4776 ,!RPC_IS_ASYNC(rqstp->rq_task));
4777 out:
4778 return status;
4779 }
4780
4781 /*
4782 * Decode LOOKUP_ROOT response
4783 */
4784 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4785 {
4786 struct xdr_stream xdr;
4787 struct compound_hdr hdr;
4788 int status;
4789
4790 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4791 status = decode_compound_hdr(&xdr, &hdr);
4792 if (status)
4793 goto out;
4794 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4795 if (status)
4796 goto out;
4797 if ((status = decode_putrootfh(&xdr)) != 0)
4798 goto out;
4799 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4800 status = decode_getfattr(&xdr, res->fattr, res->server,
4801 !RPC_IS_ASYNC(rqstp->rq_task));
4802 out:
4803 return status;
4804 }
4805
4806 /*
4807 * Decode REMOVE response
4808 */
4809 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4810 {
4811 struct xdr_stream xdr;
4812 struct compound_hdr hdr;
4813 int status;
4814
4815 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4816 status = decode_compound_hdr(&xdr, &hdr);
4817 if (status)
4818 goto out;
4819 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4820 if (status)
4821 goto out;
4822 if ((status = decode_putfh(&xdr)) != 0)
4823 goto out;
4824 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4825 goto out;
4826 decode_getfattr(&xdr, res->dir_attr, res->server,
4827 !RPC_IS_ASYNC(rqstp->rq_task));
4828 out:
4829 return status;
4830 }
4831
4832 /*
4833 * Decode RENAME response
4834 */
4835 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4836 {
4837 struct xdr_stream xdr;
4838 struct compound_hdr hdr;
4839 int status;
4840
4841 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4842 status = decode_compound_hdr(&xdr, &hdr);
4843 if (status)
4844 goto out;
4845 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4846 if (status)
4847 goto out;
4848 if ((status = decode_putfh(&xdr)) != 0)
4849 goto out;
4850 if ((status = decode_savefh(&xdr)) != 0)
4851 goto out;
4852 if ((status = decode_putfh(&xdr)) != 0)
4853 goto out;
4854 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4855 goto out;
4856 /* Current FH is target directory */
4857 if (decode_getfattr(&xdr, res->new_fattr, res->server,
4858 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4859 goto out;
4860 if ((status = decode_restorefh(&xdr)) != 0)
4861 goto out;
4862 decode_getfattr(&xdr, res->old_fattr, res->server,
4863 !RPC_IS_ASYNC(rqstp->rq_task));
4864 out:
4865 return status;
4866 }
4867
4868 /*
4869 * Decode LINK response
4870 */
4871 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4872 {
4873 struct xdr_stream xdr;
4874 struct compound_hdr hdr;
4875 int status;
4876
4877 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4878 status = decode_compound_hdr(&xdr, &hdr);
4879 if (status)
4880 goto out;
4881 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4882 if (status)
4883 goto out;
4884 if ((status = decode_putfh(&xdr)) != 0)
4885 goto out;
4886 if ((status = decode_savefh(&xdr)) != 0)
4887 goto out;
4888 if ((status = decode_putfh(&xdr)) != 0)
4889 goto out;
4890 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4891 goto out;
4892 /*
4893 * Note order: OP_LINK leaves the directory as the current
4894 * filehandle.
4895 */
4896 if (decode_getfattr(&xdr, res->dir_attr, res->server,
4897 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4898 goto out;
4899 if ((status = decode_restorefh(&xdr)) != 0)
4900 goto out;
4901 decode_getfattr(&xdr, res->fattr, res->server,
4902 !RPC_IS_ASYNC(rqstp->rq_task));
4903 out:
4904 return status;
4905 }
4906
4907 /*
4908 * Decode CREATE response
4909 */
4910 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4911 {
4912 struct xdr_stream xdr;
4913 struct compound_hdr hdr;
4914 int status;
4915
4916 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4917 status = decode_compound_hdr(&xdr, &hdr);
4918 if (status)
4919 goto out;
4920 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4921 if (status)
4922 goto out;
4923 if ((status = decode_putfh(&xdr)) != 0)
4924 goto out;
4925 if ((status = decode_savefh(&xdr)) != 0)
4926 goto out;
4927 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4928 goto out;
4929 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4930 goto out;
4931 if (decode_getfattr(&xdr, res->fattr, res->server,
4932 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4933 goto out;
4934 if ((status = decode_restorefh(&xdr)) != 0)
4935 goto out;
4936 decode_getfattr(&xdr, res->dir_fattr, res->server,
4937 !RPC_IS_ASYNC(rqstp->rq_task));
4938 out:
4939 return status;
4940 }
4941
4942 /*
4943 * Decode SYMLINK response
4944 */
4945 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4946 {
4947 return nfs4_xdr_dec_create(rqstp, p, res);
4948 }
4949
4950 /*
4951 * Decode GETATTR response
4952 */
4953 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4954 {
4955 struct xdr_stream xdr;
4956 struct compound_hdr hdr;
4957 int status;
4958
4959 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4960 status = decode_compound_hdr(&xdr, &hdr);
4961 if (status)
4962 goto out;
4963 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4964 if (status)
4965 goto out;
4966 status = decode_putfh(&xdr);
4967 if (status)
4968 goto out;
4969 status = decode_getfattr(&xdr, res->fattr, res->server,
4970 !RPC_IS_ASYNC(rqstp->rq_task));
4971 out:
4972 return status;
4973 }
4974
4975 /*
4976 * Encode an SETACL request
4977 */
4978 static int
4979 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4980 {
4981 struct xdr_stream xdr;
4982 struct compound_hdr hdr = {
4983 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4984 };
4985 int status;
4986
4987 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4988 encode_compound_hdr(&xdr, req, &hdr);
4989 encode_sequence(&xdr, &args->seq_args, &hdr);
4990 encode_putfh(&xdr, args->fh, &hdr);
4991 status = encode_setacl(&xdr, args, &hdr);
4992 encode_nops(&hdr);
4993 return status;
4994 }
4995
4996 /*
4997 * Decode SETACL response
4998 */
4999 static int
5000 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
5001 struct nfs_setaclres *res)
5002 {
5003 struct xdr_stream xdr;
5004 struct compound_hdr hdr;
5005 int status;
5006
5007 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5008 status = decode_compound_hdr(&xdr, &hdr);
5009 if (status)
5010 goto out;
5011 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5012 if (status)
5013 goto out;
5014 status = decode_putfh(&xdr);
5015 if (status)
5016 goto out;
5017 status = decode_setattr(&xdr);
5018 out:
5019 return status;
5020 }
5021
5022 /*
5023 * Decode GETACL response
5024 */
5025 static int
5026 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5027 struct nfs_getaclres *res)
5028 {
5029 struct xdr_stream xdr;
5030 struct compound_hdr hdr;
5031 int status;
5032
5033 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5034 status = decode_compound_hdr(&xdr, &hdr);
5035 if (status)
5036 goto out;
5037 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5038 if (status)
5039 goto out;
5040 status = decode_putfh(&xdr);
5041 if (status)
5042 goto out;
5043 status = decode_getacl(&xdr, rqstp, &res->acl_len);
5044
5045 out:
5046 return status;
5047 }
5048
5049 /*
5050 * Decode CLOSE response
5051 */
5052 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5053 {
5054 struct xdr_stream xdr;
5055 struct compound_hdr hdr;
5056 int status;
5057
5058 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5059 status = decode_compound_hdr(&xdr, &hdr);
5060 if (status)
5061 goto out;
5062 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5063 if (status)
5064 goto out;
5065 status = decode_putfh(&xdr);
5066 if (status)
5067 goto out;
5068 status = decode_close(&xdr, res);
5069 if (status != 0)
5070 goto out;
5071 /*
5072 * Note: Server may do delete on close for this file
5073 * in which case the getattr call will fail with
5074 * an ESTALE error. Shouldn't be a problem,
5075 * though, since fattr->valid will remain unset.
5076 */
5077 decode_getfattr(&xdr, res->fattr, res->server,
5078 !RPC_IS_ASYNC(rqstp->rq_task));
5079 out:
5080 return status;
5081 }
5082
5083 /*
5084 * Decode OPEN response
5085 */
5086 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5087 {
5088 struct xdr_stream xdr;
5089 struct compound_hdr hdr;
5090 int status;
5091
5092 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5093 status = decode_compound_hdr(&xdr, &hdr);
5094 if (status)
5095 goto out;
5096 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5097 if (status)
5098 goto out;
5099 status = decode_putfh(&xdr);
5100 if (status)
5101 goto out;
5102 status = decode_savefh(&xdr);
5103 if (status)
5104 goto out;
5105 status = decode_open(&xdr, res);
5106 if (status)
5107 goto out;
5108 if (decode_getfh(&xdr, &res->fh) != 0)
5109 goto out;
5110 if (decode_getfattr(&xdr, res->f_attr, res->server,
5111 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5112 goto out;
5113 if (decode_restorefh(&xdr) != 0)
5114 goto out;
5115 decode_getfattr(&xdr, res->dir_attr, res->server,
5116 !RPC_IS_ASYNC(rqstp->rq_task));
5117 out:
5118 return status;
5119 }
5120
5121 /*
5122 * Decode OPEN_CONFIRM response
5123 */
5124 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5125 {
5126 struct xdr_stream xdr;
5127 struct compound_hdr hdr;
5128 int status;
5129
5130 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5131 status = decode_compound_hdr(&xdr, &hdr);
5132 if (status)
5133 goto out;
5134 status = decode_putfh(&xdr);
5135 if (status)
5136 goto out;
5137 status = decode_open_confirm(&xdr, res);
5138 out:
5139 return status;
5140 }
5141
5142 /*
5143 * Decode OPEN response
5144 */
5145 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5146 {
5147 struct xdr_stream xdr;
5148 struct compound_hdr hdr;
5149 int status;
5150
5151 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5152 status = decode_compound_hdr(&xdr, &hdr);
5153 if (status)
5154 goto out;
5155 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5156 if (status)
5157 goto out;
5158 status = decode_putfh(&xdr);
5159 if (status)
5160 goto out;
5161 status = decode_open(&xdr, res);
5162 if (status)
5163 goto out;
5164 decode_getfattr(&xdr, res->f_attr, res->server,
5165 !RPC_IS_ASYNC(rqstp->rq_task));
5166 out:
5167 return status;
5168 }
5169
5170 /*
5171 * Decode SETATTR response
5172 */
5173 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5174 {
5175 struct xdr_stream xdr;
5176 struct compound_hdr hdr;
5177 int status;
5178
5179 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5180 status = decode_compound_hdr(&xdr, &hdr);
5181 if (status)
5182 goto out;
5183 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5184 if (status)
5185 goto out;
5186 status = decode_putfh(&xdr);
5187 if (status)
5188 goto out;
5189 status = decode_setattr(&xdr);
5190 if (status)
5191 goto out;
5192 decode_getfattr(&xdr, res->fattr, res->server,
5193 !RPC_IS_ASYNC(rqstp->rq_task));
5194 out:
5195 return status;
5196 }
5197
5198 /*
5199 * Decode LOCK response
5200 */
5201 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5202 {
5203 struct xdr_stream xdr;
5204 struct compound_hdr hdr;
5205 int status;
5206
5207 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5208 status = decode_compound_hdr(&xdr, &hdr);
5209 if (status)
5210 goto out;
5211 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5212 if (status)
5213 goto out;
5214 status = decode_putfh(&xdr);
5215 if (status)
5216 goto out;
5217 status = decode_lock(&xdr, res);
5218 out:
5219 return status;
5220 }
5221
5222 /*
5223 * Decode LOCKT response
5224 */
5225 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5226 {
5227 struct xdr_stream xdr;
5228 struct compound_hdr hdr;
5229 int status;
5230
5231 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5232 status = decode_compound_hdr(&xdr, &hdr);
5233 if (status)
5234 goto out;
5235 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5236 if (status)
5237 goto out;
5238 status = decode_putfh(&xdr);
5239 if (status)
5240 goto out;
5241 status = decode_lockt(&xdr, res);
5242 out:
5243 return status;
5244 }
5245
5246 /*
5247 * Decode LOCKU response
5248 */
5249 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5250 {
5251 struct xdr_stream xdr;
5252 struct compound_hdr hdr;
5253 int status;
5254
5255 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5256 status = decode_compound_hdr(&xdr, &hdr);
5257 if (status)
5258 goto out;
5259 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5260 if (status)
5261 goto out;
5262 status = decode_putfh(&xdr);
5263 if (status)
5264 goto out;
5265 status = decode_locku(&xdr, res);
5266 out:
5267 return status;
5268 }
5269
5270 /*
5271 * Decode READLINK response
5272 */
5273 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5274 struct nfs4_readlink_res *res)
5275 {
5276 struct xdr_stream xdr;
5277 struct compound_hdr hdr;
5278 int status;
5279
5280 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5281 status = decode_compound_hdr(&xdr, &hdr);
5282 if (status)
5283 goto out;
5284 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5285 if (status)
5286 goto out;
5287 status = decode_putfh(&xdr);
5288 if (status)
5289 goto out;
5290 status = decode_readlink(&xdr, rqstp);
5291 out:
5292 return status;
5293 }
5294
5295 /*
5296 * Decode READDIR response
5297 */
5298 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5299 {
5300 struct xdr_stream xdr;
5301 struct compound_hdr hdr;
5302 int status;
5303
5304 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5305 status = decode_compound_hdr(&xdr, &hdr);
5306 if (status)
5307 goto out;
5308 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5309 if (status)
5310 goto out;
5311 status = decode_putfh(&xdr);
5312 if (status)
5313 goto out;
5314 status = decode_readdir(&xdr, rqstp, res);
5315 out:
5316 return status;
5317 }
5318
5319 /*
5320 * Decode Read response
5321 */
5322 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5323 {
5324 struct xdr_stream xdr;
5325 struct compound_hdr hdr;
5326 int status;
5327
5328 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5329 status = decode_compound_hdr(&xdr, &hdr);
5330 if (status)
5331 goto out;
5332 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5333 if (status)
5334 goto out;
5335 status = decode_putfh(&xdr);
5336 if (status)
5337 goto out;
5338 status = decode_read(&xdr, rqstp, res);
5339 if (!status)
5340 status = res->count;
5341 out:
5342 return status;
5343 }
5344
5345 /*
5346 * Decode WRITE response
5347 */
5348 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5349 {
5350 struct xdr_stream xdr;
5351 struct compound_hdr hdr;
5352 int status;
5353
5354 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5355 status = decode_compound_hdr(&xdr, &hdr);
5356 if (status)
5357 goto out;
5358 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5359 if (status)
5360 goto out;
5361 status = decode_putfh(&xdr);
5362 if (status)
5363 goto out;
5364 status = decode_write(&xdr, res);
5365 if (status)
5366 goto out;
5367 decode_getfattr(&xdr, res->fattr, res->server,
5368 !RPC_IS_ASYNC(rqstp->rq_task));
5369 if (!status)
5370 status = res->count;
5371 out:
5372 return status;
5373 }
5374
5375 /*
5376 * Decode COMMIT response
5377 */
5378 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5379 {
5380 struct xdr_stream xdr;
5381 struct compound_hdr hdr;
5382 int status;
5383
5384 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5385 status = decode_compound_hdr(&xdr, &hdr);
5386 if (status)
5387 goto out;
5388 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5389 if (status)
5390 goto out;
5391 status = decode_putfh(&xdr);
5392 if (status)
5393 goto out;
5394 status = decode_commit(&xdr, res);
5395 if (status)
5396 goto out;
5397 decode_getfattr(&xdr, res->fattr, res->server,
5398 !RPC_IS_ASYNC(rqstp->rq_task));
5399 out:
5400 return status;
5401 }
5402
5403 /*
5404 * Decode FSINFO response
5405 */
5406 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5407 struct nfs4_fsinfo_res *res)
5408 {
5409 struct xdr_stream xdr;
5410 struct compound_hdr hdr;
5411 int status;
5412
5413 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5414 status = decode_compound_hdr(&xdr, &hdr);
5415 if (!status)
5416 status = decode_sequence(&xdr, &res->seq_res, req);
5417 if (!status)
5418 status = decode_putfh(&xdr);
5419 if (!status)
5420 status = decode_fsinfo(&xdr, res->fsinfo);
5421 return status;
5422 }
5423
5424 /*
5425 * Decode PATHCONF response
5426 */
5427 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5428 struct nfs4_pathconf_res *res)
5429 {
5430 struct xdr_stream xdr;
5431 struct compound_hdr hdr;
5432 int status;
5433
5434 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5435 status = decode_compound_hdr(&xdr, &hdr);
5436 if (!status)
5437 status = decode_sequence(&xdr, &res->seq_res, req);
5438 if (!status)
5439 status = decode_putfh(&xdr);
5440 if (!status)
5441 status = decode_pathconf(&xdr, res->pathconf);
5442 return status;
5443 }
5444
5445 /*
5446 * Decode STATFS response
5447 */
5448 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5449 struct nfs4_statfs_res *res)
5450 {
5451 struct xdr_stream xdr;
5452 struct compound_hdr hdr;
5453 int status;
5454
5455 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5456 status = decode_compound_hdr(&xdr, &hdr);
5457 if (!status)
5458 status = decode_sequence(&xdr, &res->seq_res, req);
5459 if (!status)
5460 status = decode_putfh(&xdr);
5461 if (!status)
5462 status = decode_statfs(&xdr, res->fsstat);
5463 return status;
5464 }
5465
5466 /*
5467 * Decode GETATTR_BITMAP response
5468 */
5469 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5470 {
5471 struct xdr_stream xdr;
5472 struct compound_hdr hdr;
5473 int status;
5474
5475 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5476 status = decode_compound_hdr(&xdr, &hdr);
5477 if (status)
5478 goto out;
5479 status = decode_sequence(&xdr, &res->seq_res, req);
5480 if (status)
5481 goto out;
5482 if ((status = decode_putfh(&xdr)) != 0)
5483 goto out;
5484 status = decode_server_caps(&xdr, res);
5485 out:
5486 return status;
5487 }
5488
5489 /*
5490 * Decode RENEW response
5491 */
5492 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5493 {
5494 struct xdr_stream xdr;
5495 struct compound_hdr hdr;
5496 int status;
5497
5498 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5499 status = decode_compound_hdr(&xdr, &hdr);
5500 if (!status)
5501 status = decode_renew(&xdr);
5502 return status;
5503 }
5504
5505 /*
5506 * Decode SETCLIENTID response
5507 */
5508 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5509 struct nfs4_setclientid_res *res)
5510 {
5511 struct xdr_stream xdr;
5512 struct compound_hdr hdr;
5513 int status;
5514
5515 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5516 status = decode_compound_hdr(&xdr, &hdr);
5517 if (!status)
5518 status = decode_setclientid(&xdr, res);
5519 return status;
5520 }
5521
5522 /*
5523 * Decode SETCLIENTID_CONFIRM response
5524 */
5525 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5526 {
5527 struct xdr_stream xdr;
5528 struct compound_hdr hdr;
5529 int status;
5530
5531 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5532 status = decode_compound_hdr(&xdr, &hdr);
5533 if (!status)
5534 status = decode_setclientid_confirm(&xdr);
5535 if (!status)
5536 status = decode_putrootfh(&xdr);
5537 if (!status)
5538 status = decode_fsinfo(&xdr, fsinfo);
5539 return status;
5540 }
5541
5542 /*
5543 * Decode DELEGRETURN response
5544 */
5545 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5546 {
5547 struct xdr_stream xdr;
5548 struct compound_hdr hdr;
5549 int status;
5550
5551 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5552 status = decode_compound_hdr(&xdr, &hdr);
5553 if (status)
5554 goto out;
5555 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5556 if (status)
5557 goto out;
5558 status = decode_putfh(&xdr);
5559 if (status != 0)
5560 goto out;
5561 status = decode_delegreturn(&xdr);
5562 if (status != 0)
5563 goto out;
5564 decode_getfattr(&xdr, res->fattr, res->server,
5565 !RPC_IS_ASYNC(rqstp->rq_task));
5566 out:
5567 return status;
5568 }
5569
5570 /*
5571 * Decode FS_LOCATIONS response
5572 */
5573 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5574 struct nfs4_fs_locations_res *res)
5575 {
5576 struct xdr_stream xdr;
5577 struct compound_hdr hdr;
5578 int status;
5579
5580 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5581 status = decode_compound_hdr(&xdr, &hdr);
5582 if (status)
5583 goto out;
5584 status = decode_sequence(&xdr, &res->seq_res, req);
5585 if (status)
5586 goto out;
5587 if ((status = decode_putfh(&xdr)) != 0)
5588 goto out;
5589 if ((status = decode_lookup(&xdr)) != 0)
5590 goto out;
5591 xdr_enter_page(&xdr, PAGE_SIZE);
5592 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5593 res->fs_locations->server,
5594 !RPC_IS_ASYNC(req->rq_task));
5595 out:
5596 return status;
5597 }
5598
5599 #if defined(CONFIG_NFS_V4_1)
5600 /*
5601 * Decode EXCHANGE_ID response
5602 */
5603 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5604 void *res)
5605 {
5606 struct xdr_stream xdr;
5607 struct compound_hdr hdr;
5608 int status;
5609
5610 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5611 status = decode_compound_hdr(&xdr, &hdr);
5612 if (!status)
5613 status = decode_exchange_id(&xdr, res);
5614 return status;
5615 }
5616
5617 /*
5618 * Decode CREATE_SESSION response
5619 */
5620 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5621 struct nfs41_create_session_res *res)
5622 {
5623 struct xdr_stream xdr;
5624 struct compound_hdr hdr;
5625 int status;
5626
5627 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5628 status = decode_compound_hdr(&xdr, &hdr);
5629 if (!status)
5630 status = decode_create_session(&xdr, res);
5631 return status;
5632 }
5633
5634 /*
5635 * Decode DESTROY_SESSION response
5636 */
5637 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5638 void *dummy)
5639 {
5640 struct xdr_stream xdr;
5641 struct compound_hdr hdr;
5642 int status;
5643
5644 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5645 status = decode_compound_hdr(&xdr, &hdr);
5646 if (!status)
5647 status = decode_destroy_session(&xdr, dummy);
5648 return status;
5649 }
5650
5651 /*
5652 * Decode SEQUENCE response
5653 */
5654 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5655 struct nfs4_sequence_res *res)
5656 {
5657 struct xdr_stream xdr;
5658 struct compound_hdr hdr;
5659 int status;
5660
5661 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5662 status = decode_compound_hdr(&xdr, &hdr);
5663 if (!status)
5664 status = decode_sequence(&xdr, res, rqstp);
5665 return status;
5666 }
5667
5668 /*
5669 * Decode GET_LEASE_TIME response
5670 */
5671 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5672 struct nfs4_get_lease_time_res *res)
5673 {
5674 struct xdr_stream xdr;
5675 struct compound_hdr hdr;
5676 int status;
5677
5678 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5679 status = decode_compound_hdr(&xdr, &hdr);
5680 if (!status)
5681 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5682 if (!status)
5683 status = decode_putrootfh(&xdr);
5684 if (!status)
5685 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5686 return status;
5687 }
5688
5689 /*
5690 * Decode RECLAIM_COMPLETE response
5691 */
5692 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5693 struct nfs41_reclaim_complete_res *res)
5694 {
5695 struct xdr_stream xdr;
5696 struct compound_hdr hdr;
5697 int status;
5698
5699 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5700 status = decode_compound_hdr(&xdr, &hdr);
5701 if (!status)
5702 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5703 if (!status)
5704 status = decode_reclaim_complete(&xdr, (void *)NULL);
5705 return status;
5706 }
5707 #endif /* CONFIG_NFS_V4_1 */
5708
5709 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5710 {
5711 uint32_t bitmap[2] = {0};
5712 uint32_t len;
5713
5714 if (!*p++) {
5715 if (!*p)
5716 return ERR_PTR(-EAGAIN);
5717 entry->eof = 1;
5718 return ERR_PTR(-EBADCOOKIE);
5719 }
5720
5721 entry->prev_cookie = entry->cookie;
5722 p = xdr_decode_hyper(p, &entry->cookie);
5723 entry->len = ntohl(*p++);
5724 entry->name = (const char *) p;
5725 p += XDR_QUADLEN(entry->len);
5726
5727 /*
5728 * In case the server doesn't return an inode number,
5729 * we fake one here. (We don't use inode number 0,
5730 * since glibc seems to choke on it...)
5731 */
5732 entry->ino = 1;
5733
5734 len = ntohl(*p++); /* bitmap length */
5735 if (len-- > 0) {
5736 bitmap[0] = ntohl(*p++);
5737 if (len-- > 0) {
5738 bitmap[1] = ntohl(*p++);
5739 p += len;
5740 }
5741 }
5742 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5743 if (len > 0) {
5744 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5745 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5746 /* Ignore the return value of rdattr_error for now */
5747 p++;
5748 len--;
5749 }
5750 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5751 xdr_decode_hyper(p, &entry->ino);
5752 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5753 xdr_decode_hyper(p, &entry->ino);
5754 p += len;
5755 }
5756
5757 entry->eof = !p[0] && p[1];
5758 return p;
5759 }
5760
5761 /*
5762 * We need to translate between nfs status return values and
5763 * the local errno values which may not be the same.
5764 */
5765 static struct {
5766 int stat;
5767 int errno;
5768 } nfs_errtbl[] = {
5769 { NFS4_OK, 0 },
5770 { NFS4ERR_PERM, -EPERM },
5771 { NFS4ERR_NOENT, -ENOENT },
5772 { NFS4ERR_IO, -errno_NFSERR_IO},
5773 { NFS4ERR_NXIO, -ENXIO },
5774 { NFS4ERR_ACCESS, -EACCES },
5775 { NFS4ERR_EXIST, -EEXIST },
5776 { NFS4ERR_XDEV, -EXDEV },
5777 { NFS4ERR_NOTDIR, -ENOTDIR },
5778 { NFS4ERR_ISDIR, -EISDIR },
5779 { NFS4ERR_INVAL, -EINVAL },
5780 { NFS4ERR_FBIG, -EFBIG },
5781 { NFS4ERR_NOSPC, -ENOSPC },
5782 { NFS4ERR_ROFS, -EROFS },
5783 { NFS4ERR_MLINK, -EMLINK },
5784 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
5785 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
5786 { NFS4ERR_DQUOT, -EDQUOT },
5787 { NFS4ERR_STALE, -ESTALE },
5788 { NFS4ERR_BADHANDLE, -EBADHANDLE },
5789 { NFS4ERR_BADOWNER, -EINVAL },
5790 { NFS4ERR_BADNAME, -EINVAL },
5791 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
5792 { NFS4ERR_NOTSUPP, -ENOTSUPP },
5793 { NFS4ERR_TOOSMALL, -ETOOSMALL },
5794 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
5795 { NFS4ERR_BADTYPE, -EBADTYPE },
5796 { NFS4ERR_LOCKED, -EAGAIN },
5797 { NFS4ERR_SYMLINK, -ELOOP },
5798 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5799 { NFS4ERR_DEADLOCK, -EDEADLK },
5800 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5801 * to be handled by a
5802 * middle-layer.
5803 */
5804 { -1, -EIO }
5805 };
5806
5807 /*
5808 * Convert an NFS error code to a local one.
5809 * This one is used jointly by NFSv2 and NFSv3.
5810 */
5811 static int
5812 nfs4_stat_to_errno(int stat)
5813 {
5814 int i;
5815 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5816 if (nfs_errtbl[i].stat == stat)
5817 return nfs_errtbl[i].errno;
5818 }
5819 if (stat <= 10000 || stat > 10100) {
5820 /* The server is looney tunes. */
5821 return -EREMOTEIO;
5822 }
5823 /* If we cannot translate the error, the recovery routines should
5824 * handle it.
5825 * Note: remaining NFSv4 error codes have values > 10000, so should
5826 * not conflict with native Linux error codes.
5827 */
5828 return -stat;
5829 }
5830
5831 #define PROC(proc, argtype, restype) \
5832 [NFSPROC4_CLNT_##proc] = { \
5833 .p_proc = NFSPROC4_COMPOUND, \
5834 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5835 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5836 .p_arglen = NFS4_##argtype##_sz, \
5837 .p_replen = NFS4_##restype##_sz, \
5838 .p_statidx = NFSPROC4_CLNT_##proc, \
5839 .p_name = #proc, \
5840 }
5841
5842 struct rpc_procinfo nfs4_procedures[] = {
5843 PROC(READ, enc_read, dec_read),
5844 PROC(WRITE, enc_write, dec_write),
5845 PROC(COMMIT, enc_commit, dec_commit),
5846 PROC(OPEN, enc_open, dec_open),
5847 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5848 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5849 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5850 PROC(CLOSE, enc_close, dec_close),
5851 PROC(SETATTR, enc_setattr, dec_setattr),
5852 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5853 PROC(RENEW, enc_renew, dec_renew),
5854 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5855 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5856 PROC(LOCK, enc_lock, dec_lock),
5857 PROC(LOCKT, enc_lockt, dec_lockt),
5858 PROC(LOCKU, enc_locku, dec_locku),
5859 PROC(ACCESS, enc_access, dec_access),
5860 PROC(GETATTR, enc_getattr, dec_getattr),
5861 PROC(LOOKUP, enc_lookup, dec_lookup),
5862 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5863 PROC(REMOVE, enc_remove, dec_remove),
5864 PROC(RENAME, enc_rename, dec_rename),
5865 PROC(LINK, enc_link, dec_link),
5866 PROC(SYMLINK, enc_symlink, dec_symlink),
5867 PROC(CREATE, enc_create, dec_create),
5868 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5869 PROC(STATFS, enc_statfs, dec_statfs),
5870 PROC(READLINK, enc_readlink, dec_readlink),
5871 PROC(READDIR, enc_readdir, dec_readdir),
5872 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5873 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5874 PROC(GETACL, enc_getacl, dec_getacl),
5875 PROC(SETACL, enc_setacl, dec_setacl),
5876 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5877 #if defined(CONFIG_NFS_V4_1)
5878 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5879 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
5880 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
5881 PROC(SEQUENCE, enc_sequence, dec_sequence),
5882 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
5883 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
5884 #endif /* CONFIG_NFS_V4_1 */
5885 };
5886
5887 struct rpc_version nfs_version4 = {
5888 .number = 4,
5889 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5890 .procs = nfs4_procedures
5891 };
5892
5893 /*
5894 * Local variables:
5895 * c-basic-offset: 8
5896 * End:
5897 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree