?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
SUNRPC: New xdr_streams XDR decoder API
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfs / nfs4xdr.c
blobf3f99156bfcbf8d578c308baf5b9ad9a4f4cfc54
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 #include "pnfs.h"
56
57 #define NFSDBG_FACILITY NFSDBG_XDR
58
59 /* Mapping from NFS error code to "errno" error code. */
60 #define errno_NFSERR_IO EIO
61
62 static int nfs4_stat_to_errno(int);
63
64 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
65 #ifdef DEBUG
66 #define NFS4_MAXTAGLEN 20
67 #else
68 #define NFS4_MAXTAGLEN 0
69 #endif
70
71 /* lock,open owner id:
72 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
73 */
74 #define open_owner_id_maxsz (1 + 4)
75 #define lock_owner_id_maxsz (1 + 4)
76 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
77 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
79 #define op_encode_hdr_maxsz (1)
80 #define op_decode_hdr_maxsz (2)
81 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
86 (NFS4_FHSIZE >> 2))
87 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
88 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
89 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
90 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
91 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
92 ((3+NFS4_FHSIZE) >> 2))
93 #define nfs4_fattr_bitmap_maxsz 3
94 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
95 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
96 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
97 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 /* This is based on getfattr, which uses the most attributes: */
100 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
101 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
102 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
103 nfs4_fattr_value_maxsz)
104 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
105 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
106 1 + 2 + 1 + \
107 nfs4_owner_maxsz + \
108 nfs4_group_maxsz + \
109 4 + 4)
110 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
111 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
112 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
113 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
114 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
115 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
116 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
117 #define decode_renew_maxsz (op_decode_hdr_maxsz)
118 #define encode_setclientid_maxsz \
119 (op_encode_hdr_maxsz + \
120 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
121 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
122 1 /* sc_prog */ + \
123 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
124 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
125 1) /* sc_cb_ident */
126 #define decode_setclientid_maxsz \
127 (op_decode_hdr_maxsz + \
128 2 + \
129 1024) /* large value for CLID_INUSE */
130 #define encode_setclientid_confirm_maxsz \
131 (op_encode_hdr_maxsz + \
132 3 + (NFS4_VERIFIER_SIZE >> 2))
133 #define decode_setclientid_confirm_maxsz \
134 (op_decode_hdr_maxsz)
135 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
136 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
137 #define encode_share_access_maxsz \
138 (2)
139 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
140 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
141 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
142 #define encode_open_maxsz (op_encode_hdr_maxsz + \
143 2 + encode_share_access_maxsz + 2 + \
144 open_owner_id_maxsz + \
145 encode_opentype_maxsz + \
146 encode_claim_null_maxsz)
147 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
148 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
149 decode_ace_maxsz)
150 #define decode_change_info_maxsz (5)
151 #define decode_open_maxsz (op_decode_hdr_maxsz + \
152 decode_stateid_maxsz + \
153 decode_change_info_maxsz + 1 + \
154 nfs4_fattr_bitmap_maxsz + \
155 decode_delegation_maxsz)
156 #define encode_open_confirm_maxsz \
157 (op_encode_hdr_maxsz + \
158 encode_stateid_maxsz + 1)
159 #define decode_open_confirm_maxsz \
160 (op_decode_hdr_maxsz + \
161 decode_stateid_maxsz)
162 #define encode_open_downgrade_maxsz \
163 (op_encode_hdr_maxsz + \
164 encode_stateid_maxsz + 1 + \
165 encode_share_access_maxsz)
166 #define decode_open_downgrade_maxsz \
167 (op_decode_hdr_maxsz + \
168 decode_stateid_maxsz)
169 #define encode_close_maxsz (op_encode_hdr_maxsz + \
170 1 + encode_stateid_maxsz)
171 #define decode_close_maxsz (op_decode_hdr_maxsz + \
172 decode_stateid_maxsz)
173 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
174 encode_stateid_maxsz + \
175 encode_attrs_maxsz)
176 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
177 nfs4_fattr_bitmap_maxsz)
178 #define encode_read_maxsz (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 3)
180 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
181 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
182 2 + encode_verifier_maxsz + 5)
183 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
184 decode_verifier_maxsz)
185 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
186 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
187 #define encode_write_maxsz (op_encode_hdr_maxsz + \
188 encode_stateid_maxsz + 4)
189 #define decode_write_maxsz (op_decode_hdr_maxsz + \
190 2 + decode_verifier_maxsz)
191 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
192 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
193 decode_verifier_maxsz)
194 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
195 nfs4_name_maxsz)
196 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
197 decode_change_info_maxsz)
198 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
199 2 * nfs4_name_maxsz)
200 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
201 decode_change_info_maxsz + \
202 decode_change_info_maxsz)
203 #define encode_link_maxsz (op_encode_hdr_maxsz + \
204 nfs4_name_maxsz)
205 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
206 #define encode_lockowner_maxsz (7)
207 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
208 7 + \
209 1 + encode_stateid_maxsz + 1 + \
210 encode_lockowner_maxsz)
211 #define decode_lock_denied_maxsz \
212 (8 + decode_lockowner_maxsz)
213 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
214 decode_lock_denied_maxsz)
215 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
216 encode_lockowner_maxsz)
217 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
218 decode_lock_denied_maxsz)
219 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
220 encode_stateid_maxsz + \
221 4)
222 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
223 decode_stateid_maxsz)
224 #define encode_release_lockowner_maxsz \
225 (op_encode_hdr_maxsz + \
226 encode_lockowner_maxsz)
227 #define decode_release_lockowner_maxsz \
228 (op_decode_hdr_maxsz)
229 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
230 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
231 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
232 1 + nfs4_name_maxsz + \
233 1 + \
234 nfs4_fattr_maxsz)
235 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
236 #define encode_create_maxsz (op_encode_hdr_maxsz + \
237 1 + 2 + nfs4_name_maxsz + \
238 encode_attrs_maxsz)
239 #define decode_create_maxsz (op_decode_hdr_maxsz + \
240 decode_change_info_maxsz + \
241 nfs4_fattr_bitmap_maxsz)
242 #define encode_statfs_maxsz (encode_getattr_maxsz)
243 #define decode_statfs_maxsz (decode_getattr_maxsz)
244 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
245 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
246 #define encode_getacl_maxsz (encode_getattr_maxsz)
247 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
248 nfs4_fattr_bitmap_maxsz + 1)
249 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
250 encode_stateid_maxsz + 3)
251 #define decode_setacl_maxsz (decode_setattr_maxsz)
252 #define encode_fs_locations_maxsz \
253 (encode_getattr_maxsz)
254 #define decode_fs_locations_maxsz \
255 (0)
256
257 #if defined(CONFIG_NFS_V4_1)
258 #define NFS4_MAX_MACHINE_NAME_LEN (64)
259
260 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
261 encode_verifier_maxsz + \
262 1 /* co_ownerid.len */ + \
263 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
264 1 /* flags */ + \
265 1 /* spa_how */ + \
266 0 /* SP4_NONE (for now) */ + \
267 1 /* zero implemetation id array */)
268 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
269 2 /* eir_clientid */ + \
270 1 /* eir_sequenceid */ + \
271 1 /* eir_flags */ + \
272 1 /* spr_how */ + \
273 0 /* SP4_NONE (for now) */ + \
274 2 /* eir_server_owner.so_minor_id */ + \
275 /* eir_server_owner.so_major_id<> */ \
276 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
277 /* eir_server_scope<> */ \
278 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
279 1 /* eir_server_impl_id array length */ + \
280 0 /* ignored eir_server_impl_id contents */)
281 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
282 #define decode_channel_attrs_maxsz (6 + \
283 1 /* ca_rdma_ird.len */ + \
284 1 /* ca_rdma_ird */)
285 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
286 2 /* csa_clientid */ + \
287 1 /* csa_sequence */ + \
288 1 /* csa_flags */ + \
289 encode_channel_attrs_maxsz + \
290 encode_channel_attrs_maxsz + \
291 1 /* csa_cb_program */ + \
292 1 /* csa_sec_parms.len (1) */ + \
293 1 /* cb_secflavor (AUTH_SYS) */ + \
294 1 /* stamp */ + \
295 1 /* machinename.len */ + \
296 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
297 1 /* uid */ + \
298 1 /* gid */ + \
299 1 /* gids.len (0) */)
300 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
301 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
302 1 /* csr_sequence */ + \
303 1 /* csr_flags */ + \
304 decode_channel_attrs_maxsz + \
305 decode_channel_attrs_maxsz)
306 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
307 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
308 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
309 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
310 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
311 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
312 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
313 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
314 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
315 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
316 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
317 1 /* layout type */ + \
318 1 /* opaque devaddr4 length */ + \
319 /* devaddr4 payload is read into page */ \
320 1 /* notification bitmap length */ + \
321 1 /* notification bitmap */)
322 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
323 encode_stateid_maxsz)
324 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
325 decode_stateid_maxsz + \
326 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
327 #else /* CONFIG_NFS_V4_1 */
328 #define encode_sequence_maxsz 0
329 #define decode_sequence_maxsz 0
330 #endif /* CONFIG_NFS_V4_1 */
331
332 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
333 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
334 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
335 encode_sequence_maxsz + \
336 encode_putfh_maxsz + \
337 encode_read_maxsz)
338 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
339 decode_sequence_maxsz + \
340 decode_putfh_maxsz + \
341 decode_read_maxsz)
342 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
343 encode_sequence_maxsz + \
344 encode_putfh_maxsz + \
345 encode_readlink_maxsz)
346 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
347 decode_sequence_maxsz + \
348 decode_putfh_maxsz + \
349 decode_readlink_maxsz)
350 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
351 encode_sequence_maxsz + \
352 encode_putfh_maxsz + \
353 encode_readdir_maxsz)
354 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
355 decode_sequence_maxsz + \
356 decode_putfh_maxsz + \
357 decode_readdir_maxsz)
358 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
359 encode_sequence_maxsz + \
360 encode_putfh_maxsz + \
361 encode_write_maxsz + \
362 encode_getattr_maxsz)
363 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
364 decode_sequence_maxsz + \
365 decode_putfh_maxsz + \
366 decode_write_maxsz + \
367 decode_getattr_maxsz)
368 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
369 encode_sequence_maxsz + \
370 encode_putfh_maxsz + \
371 encode_commit_maxsz + \
372 encode_getattr_maxsz)
373 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
374 decode_sequence_maxsz + \
375 decode_putfh_maxsz + \
376 decode_commit_maxsz + \
377 decode_getattr_maxsz)
378 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
379 encode_sequence_maxsz + \
380 encode_putfh_maxsz + \
381 encode_savefh_maxsz + \
382 encode_open_maxsz + \
383 encode_getfh_maxsz + \
384 encode_getattr_maxsz + \
385 encode_restorefh_maxsz + \
386 encode_getattr_maxsz)
387 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
388 decode_sequence_maxsz + \
389 decode_putfh_maxsz + \
390 decode_savefh_maxsz + \
391 decode_open_maxsz + \
392 decode_getfh_maxsz + \
393 decode_getattr_maxsz + \
394 decode_restorefh_maxsz + \
395 decode_getattr_maxsz)
396 #define NFS4_enc_open_confirm_sz \
397 (compound_encode_hdr_maxsz + \
398 encode_putfh_maxsz + \
399 encode_open_confirm_maxsz)
400 #define NFS4_dec_open_confirm_sz \
401 (compound_decode_hdr_maxsz + \
402 decode_putfh_maxsz + \
403 decode_open_confirm_maxsz)
404 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
405 encode_sequence_maxsz + \
406 encode_putfh_maxsz + \
407 encode_open_maxsz + \
408 encode_getattr_maxsz)
409 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
410 decode_sequence_maxsz + \
411 decode_putfh_maxsz + \
412 decode_open_maxsz + \
413 decode_getattr_maxsz)
414 #define NFS4_enc_open_downgrade_sz \
415 (compound_encode_hdr_maxsz + \
416 encode_sequence_maxsz + \
417 encode_putfh_maxsz + \
418 encode_open_downgrade_maxsz + \
419 encode_getattr_maxsz)
420 #define NFS4_dec_open_downgrade_sz \
421 (compound_decode_hdr_maxsz + \
422 decode_sequence_maxsz + \
423 decode_putfh_maxsz + \
424 decode_open_downgrade_maxsz + \
425 decode_getattr_maxsz)
426 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
427 encode_sequence_maxsz + \
428 encode_putfh_maxsz + \
429 encode_close_maxsz + \
430 encode_getattr_maxsz)
431 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
432 decode_sequence_maxsz + \
433 decode_putfh_maxsz + \
434 decode_close_maxsz + \
435 decode_getattr_maxsz)
436 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
437 encode_sequence_maxsz + \
438 encode_putfh_maxsz + \
439 encode_setattr_maxsz + \
440 encode_getattr_maxsz)
441 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_setattr_maxsz + \
445 decode_getattr_maxsz)
446 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
447 encode_sequence_maxsz + \
448 encode_putfh_maxsz + \
449 encode_fsinfo_maxsz)
450 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
451 decode_sequence_maxsz + \
452 decode_putfh_maxsz + \
453 decode_fsinfo_maxsz)
454 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
455 encode_renew_maxsz)
456 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
457 decode_renew_maxsz)
458 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
459 encode_setclientid_maxsz)
460 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
461 decode_setclientid_maxsz)
462 #define NFS4_enc_setclientid_confirm_sz \
463 (compound_encode_hdr_maxsz + \
464 encode_setclientid_confirm_maxsz + \
465 encode_putrootfh_maxsz + \
466 encode_fsinfo_maxsz)
467 #define NFS4_dec_setclientid_confirm_sz \
468 (compound_decode_hdr_maxsz + \
469 decode_setclientid_confirm_maxsz + \
470 decode_putrootfh_maxsz + \
471 decode_fsinfo_maxsz)
472 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
473 encode_sequence_maxsz + \
474 encode_putfh_maxsz + \
475 encode_lock_maxsz)
476 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
477 decode_sequence_maxsz + \
478 decode_putfh_maxsz + \
479 decode_lock_maxsz)
480 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
481 encode_sequence_maxsz + \
482 encode_putfh_maxsz + \
483 encode_lockt_maxsz)
484 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
485 decode_sequence_maxsz + \
486 decode_putfh_maxsz + \
487 decode_lockt_maxsz)
488 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
489 encode_sequence_maxsz + \
490 encode_putfh_maxsz + \
491 encode_locku_maxsz)
492 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
493 decode_sequence_maxsz + \
494 decode_putfh_maxsz + \
495 decode_locku_maxsz)
496 #define NFS4_enc_release_lockowner_sz \
497 (compound_encode_hdr_maxsz + \
498 encode_lockowner_maxsz)
499 #define NFS4_dec_release_lockowner_sz \
500 (compound_decode_hdr_maxsz + \
501 decode_lockowner_maxsz)
502 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putfh_maxsz + \
505 encode_access_maxsz + \
506 encode_getattr_maxsz)
507 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
508 decode_sequence_maxsz + \
509 decode_putfh_maxsz + \
510 decode_access_maxsz + \
511 decode_getattr_maxsz)
512 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
513 encode_sequence_maxsz + \
514 encode_putfh_maxsz + \
515 encode_getattr_maxsz)
516 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
517 decode_sequence_maxsz + \
518 decode_putfh_maxsz + \
519 decode_getattr_maxsz)
520 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
521 encode_sequence_maxsz + \
522 encode_putfh_maxsz + \
523 encode_lookup_maxsz + \
524 encode_getattr_maxsz + \
525 encode_getfh_maxsz)
526 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
527 decode_sequence_maxsz + \
528 decode_putfh_maxsz + \
529 decode_lookup_maxsz + \
530 decode_getattr_maxsz + \
531 decode_getfh_maxsz)
532 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
533 encode_sequence_maxsz + \
534 encode_putrootfh_maxsz + \
535 encode_getattr_maxsz + \
536 encode_getfh_maxsz)
537 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
538 decode_sequence_maxsz + \
539 decode_putrootfh_maxsz + \
540 decode_getattr_maxsz + \
541 decode_getfh_maxsz)
542 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
543 encode_sequence_maxsz + \
544 encode_putfh_maxsz + \
545 encode_remove_maxsz + \
546 encode_getattr_maxsz)
547 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
548 decode_sequence_maxsz + \
549 decode_putfh_maxsz + \
550 decode_remove_maxsz + \
551 decode_getattr_maxsz)
552 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
553 encode_sequence_maxsz + \
554 encode_putfh_maxsz + \
555 encode_savefh_maxsz + \
556 encode_putfh_maxsz + \
557 encode_rename_maxsz + \
558 encode_getattr_maxsz + \
559 encode_restorefh_maxsz + \
560 encode_getattr_maxsz)
561 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_savefh_maxsz + \
565 decode_putfh_maxsz + \
566 decode_rename_maxsz + \
567 decode_getattr_maxsz + \
568 decode_restorefh_maxsz + \
569 decode_getattr_maxsz)
570 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
571 encode_sequence_maxsz + \
572 encode_putfh_maxsz + \
573 encode_savefh_maxsz + \
574 encode_putfh_maxsz + \
575 encode_link_maxsz + \
576 decode_getattr_maxsz + \
577 encode_restorefh_maxsz + \
578 decode_getattr_maxsz)
579 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putfh_maxsz + \
582 decode_savefh_maxsz + \
583 decode_putfh_maxsz + \
584 decode_link_maxsz + \
585 decode_getattr_maxsz + \
586 decode_restorefh_maxsz + \
587 decode_getattr_maxsz)
588 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
589 encode_sequence_maxsz + \
590 encode_putfh_maxsz + \
591 encode_symlink_maxsz + \
592 encode_getattr_maxsz + \
593 encode_getfh_maxsz)
594 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_symlink_maxsz + \
598 decode_getattr_maxsz + \
599 decode_getfh_maxsz)
600 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
601 encode_sequence_maxsz + \
602 encode_putfh_maxsz + \
603 encode_savefh_maxsz + \
604 encode_create_maxsz + \
605 encode_getfh_maxsz + \
606 encode_getattr_maxsz + \
607 encode_restorefh_maxsz + \
608 encode_getattr_maxsz)
609 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
610 decode_sequence_maxsz + \
611 decode_putfh_maxsz + \
612 decode_savefh_maxsz + \
613 decode_create_maxsz + \
614 decode_getfh_maxsz + \
615 decode_getattr_maxsz + \
616 decode_restorefh_maxsz + \
617 decode_getattr_maxsz)
618 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
619 encode_sequence_maxsz + \
620 encode_putfh_maxsz + \
621 encode_getattr_maxsz)
622 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
623 decode_sequence_maxsz + \
624 decode_putfh_maxsz + \
625 decode_getattr_maxsz)
626 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
627 encode_sequence_maxsz + \
628 encode_putfh_maxsz + \
629 encode_statfs_maxsz)
630 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
631 decode_sequence_maxsz + \
632 decode_putfh_maxsz + \
633 decode_statfs_maxsz)
634 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
635 encode_sequence_maxsz + \
636 encode_putfh_maxsz + \
637 encode_getattr_maxsz)
638 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
639 decode_sequence_maxsz + \
640 decode_putfh_maxsz + \
641 decode_getattr_maxsz)
642 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
643 encode_sequence_maxsz + \
644 encode_putfh_maxsz + \
645 encode_delegreturn_maxsz + \
646 encode_getattr_maxsz)
647 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
648 decode_sequence_maxsz + \
649 decode_delegreturn_maxsz + \
650 decode_getattr_maxsz)
651 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
652 encode_sequence_maxsz + \
653 encode_putfh_maxsz + \
654 encode_getacl_maxsz)
655 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
656 decode_sequence_maxsz + \
657 decode_putfh_maxsz + \
658 decode_getacl_maxsz)
659 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
660 encode_sequence_maxsz + \
661 encode_putfh_maxsz + \
662 encode_setacl_maxsz)
663 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
664 decode_sequence_maxsz + \
665 decode_putfh_maxsz + \
666 decode_setacl_maxsz)
667 #define NFS4_enc_fs_locations_sz \
668 (compound_encode_hdr_maxsz + \
669 encode_sequence_maxsz + \
670 encode_putfh_maxsz + \
671 encode_lookup_maxsz + \
672 encode_fs_locations_maxsz)
673 #define NFS4_dec_fs_locations_sz \
674 (compound_decode_hdr_maxsz + \
675 decode_sequence_maxsz + \
676 decode_putfh_maxsz + \
677 decode_lookup_maxsz + \
678 decode_fs_locations_maxsz)
679 #if defined(CONFIG_NFS_V4_1)
680 #define NFS4_enc_exchange_id_sz \
681 (compound_encode_hdr_maxsz + \
682 encode_exchange_id_maxsz)
683 #define NFS4_dec_exchange_id_sz \
684 (compound_decode_hdr_maxsz + \
685 decode_exchange_id_maxsz)
686 #define NFS4_enc_create_session_sz \
687 (compound_encode_hdr_maxsz + \
688 encode_create_session_maxsz)
689 #define NFS4_dec_create_session_sz \
690 (compound_decode_hdr_maxsz + \
691 decode_create_session_maxsz)
692 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
693 encode_destroy_session_maxsz)
694 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
695 decode_destroy_session_maxsz)
696 #define NFS4_enc_sequence_sz \
697 (compound_decode_hdr_maxsz + \
698 encode_sequence_maxsz)
699 #define NFS4_dec_sequence_sz \
700 (compound_decode_hdr_maxsz + \
701 decode_sequence_maxsz)
702 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
703 encode_sequence_maxsz + \
704 encode_putrootfh_maxsz + \
705 encode_fsinfo_maxsz)
706 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
707 decode_sequence_maxsz + \
708 decode_putrootfh_maxsz + \
709 decode_fsinfo_maxsz)
710 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
711 encode_sequence_maxsz + \
712 encode_reclaim_complete_maxsz)
713 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
714 decode_sequence_maxsz + \
715 decode_reclaim_complete_maxsz)
716 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
717 encode_sequence_maxsz +\
718 encode_getdeviceinfo_maxsz)
719 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_getdeviceinfo_maxsz)
722 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
723 encode_sequence_maxsz + \
724 encode_putfh_maxsz + \
725 encode_layoutget_maxsz)
726 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
727 decode_sequence_maxsz + \
728 decode_putfh_maxsz + \
729 decode_layoutget_maxsz)
730
731 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
732 compound_encode_hdr_maxsz +
733 encode_sequence_maxsz +
734 encode_putfh_maxsz +
735 encode_getattr_maxsz) *
736 XDR_UNIT);
737
738 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
739 compound_decode_hdr_maxsz +
740 decode_sequence_maxsz +
741 decode_putfh_maxsz) *
742 XDR_UNIT);
743 #endif /* CONFIG_NFS_V4_1 */
744
745 static const umode_t nfs_type2fmt[] = {
746 [NF4BAD] = 0,
747 [NF4REG] = S_IFREG,
748 [NF4DIR] = S_IFDIR,
749 [NF4BLK] = S_IFBLK,
750 [NF4CHR] = S_IFCHR,
751 [NF4LNK] = S_IFLNK,
752 [NF4SOCK] = S_IFSOCK,
753 [NF4FIFO] = S_IFIFO,
754 [NF4ATTRDIR] = 0,
755 [NF4NAMEDATTR] = 0,
756 };
757
758 struct compound_hdr {
759 int32_t status;
760 uint32_t nops;
761 __be32 * nops_p;
762 uint32_t taglen;
763 char * tag;
764 uint32_t replen; /* expected reply words */
765 u32 minorversion;
766 };
767
768 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
769 {
770 __be32 *p = xdr_reserve_space(xdr, nbytes);
771 BUG_ON(!p);
772 return p;
773 }
774
775 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
776 {
777 __be32 *p;
778
779 p = xdr_reserve_space(xdr, 4 + len);
780 BUG_ON(p == NULL);
781 xdr_encode_opaque(p, str, len);
782 }
783
784 static void encode_compound_hdr(struct xdr_stream *xdr,
785 struct rpc_rqst *req,
786 struct compound_hdr *hdr)
787 {
788 __be32 *p;
789 struct rpc_auth *auth = req->rq_cred->cr_auth;
790
791 /* initialize running count of expected bytes in reply.
792 * NOTE: the replied tag SHOULD be the same is the one sent,
793 * but this is not required as a MUST for the server to do so. */
794 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
795
796 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
797 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
798 p = reserve_space(xdr, 4 + hdr->taglen + 8);
799 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
800 *p++ = cpu_to_be32(hdr->minorversion);
801 hdr->nops_p = p;
802 *p = cpu_to_be32(hdr->nops);
803 }
804
805 static void encode_nops(struct compound_hdr *hdr)
806 {
807 BUG_ON(hdr->nops > NFS4_MAX_OPS);
808 *hdr->nops_p = htonl(hdr->nops);
809 }
810
811 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
812 {
813 __be32 *p;
814
815 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
816 BUG_ON(p == NULL);
817 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
818 }
819
820 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
821 {
822 char owner_name[IDMAP_NAMESZ];
823 char owner_group[IDMAP_NAMESZ];
824 int owner_namelen = 0;
825 int owner_grouplen = 0;
826 __be32 *p;
827 __be32 *q;
828 int len;
829 uint32_t bmval0 = 0;
830 uint32_t bmval1 = 0;
831
832 /*
833 * We reserve enough space to write the entire attribute buffer at once.
834 * In the worst-case, this would be
835 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
836 * = 36 bytes, plus any contribution from variable-length fields
837 * such as owner/group.
838 */
839 len = 16;
840
841 /* Sigh */
842 if (iap->ia_valid & ATTR_SIZE)
843 len += 8;
844 if (iap->ia_valid & ATTR_MODE)
845 len += 4;
846 if (iap->ia_valid & ATTR_UID) {
847 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
848 if (owner_namelen < 0) {
849 dprintk("nfs: couldn't resolve uid %d to string\n",
850 iap->ia_uid);
851 /* XXX */
852 strcpy(owner_name, "nobody");
853 owner_namelen = sizeof("nobody") - 1;
854 /* goto out; */
855 }
856 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
857 }
858 if (iap->ia_valid & ATTR_GID) {
859 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
860 if (owner_grouplen < 0) {
861 dprintk("nfs: couldn't resolve gid %d to string\n",
862 iap->ia_gid);
863 strcpy(owner_group, "nobody");
864 owner_grouplen = sizeof("nobody") - 1;
865 /* goto out; */
866 }
867 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
868 }
869 if (iap->ia_valid & ATTR_ATIME_SET)
870 len += 16;
871 else if (iap->ia_valid & ATTR_ATIME)
872 len += 4;
873 if (iap->ia_valid & ATTR_MTIME_SET)
874 len += 16;
875 else if (iap->ia_valid & ATTR_MTIME)
876 len += 4;
877 p = reserve_space(xdr, len);
878
879 /*
880 * We write the bitmap length now, but leave the bitmap and the attribute
881 * buffer length to be backfilled at the end of this routine.
882 */
883 *p++ = cpu_to_be32(2);
884 q = p;
885 p += 3;
886
887 if (iap->ia_valid & ATTR_SIZE) {
888 bmval0 |= FATTR4_WORD0_SIZE;
889 p = xdr_encode_hyper(p, iap->ia_size);
890 }
891 if (iap->ia_valid & ATTR_MODE) {
892 bmval1 |= FATTR4_WORD1_MODE;
893 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
894 }
895 if (iap->ia_valid & ATTR_UID) {
896 bmval1 |= FATTR4_WORD1_OWNER;
897 p = xdr_encode_opaque(p, owner_name, owner_namelen);
898 }
899 if (iap->ia_valid & ATTR_GID) {
900 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
901 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
902 }
903 if (iap->ia_valid & ATTR_ATIME_SET) {
904 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
905 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
906 *p++ = cpu_to_be32(0);
907 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
908 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
909 }
910 else if (iap->ia_valid & ATTR_ATIME) {
911 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
912 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
913 }
914 if (iap->ia_valid & ATTR_MTIME_SET) {
915 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
916 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
917 *p++ = cpu_to_be32(0);
918 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
919 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
920 }
921 else if (iap->ia_valid & ATTR_MTIME) {
922 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
923 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
924 }
925
926 /*
927 * Now we backfill the bitmap and the attribute buffer length.
928 */
929 if (len != ((char *)p - (char *)q) + 4) {
930 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
931 len, ((char *)p - (char *)q) + 4);
932 BUG();
933 }
934 len = (char *)p - (char *)q - 12;
935 *q++ = htonl(bmval0);
936 *q++ = htonl(bmval1);
937 *q = htonl(len);
938
939 /* out: */
940 }
941
942 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
943 {
944 __be32 *p;
945
946 p = reserve_space(xdr, 8);
947 *p++ = cpu_to_be32(OP_ACCESS);
948 *p = cpu_to_be32(access);
949 hdr->nops++;
950 hdr->replen += decode_access_maxsz;
951 }
952
953 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
954 {
955 __be32 *p;
956
957 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
958 *p++ = cpu_to_be32(OP_CLOSE);
959 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
960 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
961 hdr->nops++;
962 hdr->replen += decode_close_maxsz;
963 }
964
965 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
966 {
967 __be32 *p;
968
969 p = reserve_space(xdr, 16);
970 *p++ = cpu_to_be32(OP_COMMIT);
971 p = xdr_encode_hyper(p, args->offset);
972 *p = cpu_to_be32(args->count);
973 hdr->nops++;
974 hdr->replen += decode_commit_maxsz;
975 }
976
977 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
978 {
979 __be32 *p;
980
981 p = reserve_space(xdr, 8);
982 *p++ = cpu_to_be32(OP_CREATE);
983 *p = cpu_to_be32(create->ftype);
984
985 switch (create->ftype) {
986 case NF4LNK:
987 p = reserve_space(xdr, 4);
988 *p = cpu_to_be32(create->u.symlink.len);
989 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
990 break;
991
992 case NF4BLK: case NF4CHR:
993 p = reserve_space(xdr, 8);
994 *p++ = cpu_to_be32(create->u.device.specdata1);
995 *p = cpu_to_be32(create->u.device.specdata2);
996 break;
997
998 default:
999 break;
1000 }
1001
1002 encode_string(xdr, create->name->len, create->name->name);
1003 hdr->nops++;
1004 hdr->replen += decode_create_maxsz;
1005
1006 encode_attrs(xdr, create->attrs, create->server);
1007 }
1008
1009 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1010 {
1011 __be32 *p;
1012
1013 p = reserve_space(xdr, 12);
1014 *p++ = cpu_to_be32(OP_GETATTR);
1015 *p++ = cpu_to_be32(1);
1016 *p = cpu_to_be32(bitmap);
1017 hdr->nops++;
1018 hdr->replen += decode_getattr_maxsz;
1019 }
1020
1021 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1022 {
1023 __be32 *p;
1024
1025 p = reserve_space(xdr, 16);
1026 *p++ = cpu_to_be32(OP_GETATTR);
1027 *p++ = cpu_to_be32(2);
1028 *p++ = cpu_to_be32(bm0);
1029 *p = cpu_to_be32(bm1);
1030 hdr->nops++;
1031 hdr->replen += decode_getattr_maxsz;
1032 }
1033
1034 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1035 {
1036 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1037 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1038 }
1039
1040 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1041 {
1042 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1043 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1044 }
1045
1046 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1047 {
1048 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1049 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1050 }
1051
1052 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1053 {
1054 __be32 *p;
1055
1056 p = reserve_space(xdr, 4);
1057 *p = cpu_to_be32(OP_GETFH);
1058 hdr->nops++;
1059 hdr->replen += decode_getfh_maxsz;
1060 }
1061
1062 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1063 {
1064 __be32 *p;
1065
1066 p = reserve_space(xdr, 8 + name->len);
1067 *p++ = cpu_to_be32(OP_LINK);
1068 xdr_encode_opaque(p, name->name, name->len);
1069 hdr->nops++;
1070 hdr->replen += decode_link_maxsz;
1071 }
1072
1073 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1074 {
1075 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1076 return block ? NFS4_READW_LT : NFS4_READ_LT;
1077 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1078 }
1079
1080 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1081 {
1082 if (fl->fl_end == OFFSET_MAX)
1083 return ~(uint64_t)0;
1084 return fl->fl_end - fl->fl_start + 1;
1085 }
1086
1087 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1088 {
1089 __be32 *p;
1090
1091 p = reserve_space(xdr, 28);
1092 p = xdr_encode_hyper(p, lowner->clientid);
1093 *p++ = cpu_to_be32(16);
1094 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1095 xdr_encode_hyper(p, lowner->id);
1096 }
1097
1098 /*
1099 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1100 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1101 */
1102 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1103 {
1104 __be32 *p;
1105
1106 p = reserve_space(xdr, 32);
1107 *p++ = cpu_to_be32(OP_LOCK);
1108 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1109 *p++ = cpu_to_be32(args->reclaim);
1110 p = xdr_encode_hyper(p, args->fl->fl_start);
1111 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1112 *p = cpu_to_be32(args->new_lock_owner);
1113 if (args->new_lock_owner){
1114 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1115 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1116 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1117 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1118 encode_lockowner(xdr, &args->lock_owner);
1119 }
1120 else {
1121 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1122 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1123 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1124 }
1125 hdr->nops++;
1126 hdr->replen += decode_lock_maxsz;
1127 }
1128
1129 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1130 {
1131 __be32 *p;
1132
1133 p = reserve_space(xdr, 24);
1134 *p++ = cpu_to_be32(OP_LOCKT);
1135 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1136 p = xdr_encode_hyper(p, args->fl->fl_start);
1137 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1138 encode_lockowner(xdr, &args->lock_owner);
1139 hdr->nops++;
1140 hdr->replen += decode_lockt_maxsz;
1141 }
1142
1143 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1144 {
1145 __be32 *p;
1146
1147 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1148 *p++ = cpu_to_be32(OP_LOCKU);
1149 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1150 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1151 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1152 p = xdr_encode_hyper(p, args->fl->fl_start);
1153 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1154 hdr->nops++;
1155 hdr->replen += decode_locku_maxsz;
1156 }
1157
1158 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1159 {
1160 __be32 *p;
1161
1162 p = reserve_space(xdr, 4);
1163 *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1164 encode_lockowner(xdr, lowner);
1165 hdr->nops++;
1166 hdr->replen += decode_release_lockowner_maxsz;
1167 }
1168
1169 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1170 {
1171 int len = name->len;
1172 __be32 *p;
1173
1174 p = reserve_space(xdr, 8 + len);
1175 *p++ = cpu_to_be32(OP_LOOKUP);
1176 xdr_encode_opaque(p, name->name, len);
1177 hdr->nops++;
1178 hdr->replen += decode_lookup_maxsz;
1179 }
1180
1181 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1182 {
1183 __be32 *p;
1184
1185 p = reserve_space(xdr, 8);
1186 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1187 case FMODE_READ:
1188 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1189 break;
1190 case FMODE_WRITE:
1191 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1192 break;
1193 case FMODE_READ|FMODE_WRITE:
1194 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1195 break;
1196 default:
1197 *p++ = cpu_to_be32(0);
1198 }
1199 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1200 }
1201
1202 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1203 {
1204 __be32 *p;
1205 /*
1206 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1207 * owner 4 = 32
1208 */
1209 p = reserve_space(xdr, 8);
1210 *p++ = cpu_to_be32(OP_OPEN);
1211 *p = cpu_to_be32(arg->seqid->sequence->counter);
1212 encode_share_access(xdr, arg->fmode);
1213 p = reserve_space(xdr, 28);
1214 p = xdr_encode_hyper(p, arg->clientid);
1215 *p++ = cpu_to_be32(16);
1216 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1217 xdr_encode_hyper(p, arg->id);
1218 }
1219
1220 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1221 {
1222 __be32 *p;
1223 struct nfs_client *clp;
1224
1225 p = reserve_space(xdr, 4);
1226 switch(arg->open_flags & O_EXCL) {
1227 case 0:
1228 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1229 encode_attrs(xdr, arg->u.attrs, arg->server);
1230 break;
1231 default:
1232 clp = arg->server->nfs_client;
1233 if (clp->cl_mvops->minor_version > 0) {
1234 if (nfs4_has_persistent_session(clp)) {
1235 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1236 encode_attrs(xdr, arg->u.attrs, arg->server);
1237 } else {
1238 struct iattr dummy;
1239
1240 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1241 encode_nfs4_verifier(xdr, &arg->u.verifier);
1242 dummy.ia_valid = 0;
1243 encode_attrs(xdr, &dummy, arg->server);
1244 }
1245 } else {
1246 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1247 encode_nfs4_verifier(xdr, &arg->u.verifier);
1248 }
1249 }
1250 }
1251
1252 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1253 {
1254 __be32 *p;
1255
1256 p = reserve_space(xdr, 4);
1257 switch (arg->open_flags & O_CREAT) {
1258 case 0:
1259 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1260 break;
1261 default:
1262 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1263 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1264 encode_createmode(xdr, arg);
1265 }
1266 }
1267
1268 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1269 {
1270 __be32 *p;
1271
1272 p = reserve_space(xdr, 4);
1273 switch (delegation_type) {
1274 case 0:
1275 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1276 break;
1277 case FMODE_READ:
1278 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1279 break;
1280 case FMODE_WRITE|FMODE_READ:
1281 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1282 break;
1283 default:
1284 BUG();
1285 }
1286 }
1287
1288 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1289 {
1290 __be32 *p;
1291
1292 p = reserve_space(xdr, 4);
1293 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1294 encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1298 {
1299 __be32 *p;
1300
1301 p = reserve_space(xdr, 4);
1302 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1303 encode_delegation_type(xdr, type);
1304 }
1305
1306 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1307 {
1308 __be32 *p;
1309
1310 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1311 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1312 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1313 encode_string(xdr, name->len, name->name);
1314 }
1315
1316 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1317 {
1318 encode_openhdr(xdr, arg);
1319 encode_opentype(xdr, arg);
1320 switch (arg->claim) {
1321 case NFS4_OPEN_CLAIM_NULL:
1322 encode_claim_null(xdr, arg->name);
1323 break;
1324 case NFS4_OPEN_CLAIM_PREVIOUS:
1325 encode_claim_previous(xdr, arg->u.delegation_type);
1326 break;
1327 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1328 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1329 break;
1330 default:
1331 BUG();
1332 }
1333 hdr->nops++;
1334 hdr->replen += decode_open_maxsz;
1335 }
1336
1337 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1338 {
1339 __be32 *p;
1340
1341 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1342 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1343 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1344 *p = cpu_to_be32(arg->seqid->sequence->counter);
1345 hdr->nops++;
1346 hdr->replen += decode_open_confirm_maxsz;
1347 }
1348
1349 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1350 {
1351 __be32 *p;
1352
1353 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1354 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1355 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1356 *p = cpu_to_be32(arg->seqid->sequence->counter);
1357 encode_share_access(xdr, arg->fmode);
1358 hdr->nops++;
1359 hdr->replen += decode_open_downgrade_maxsz;
1360 }
1361
1362 static void
1363 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1364 {
1365 int len = fh->size;
1366 __be32 *p;
1367
1368 p = reserve_space(xdr, 8 + len);
1369 *p++ = cpu_to_be32(OP_PUTFH);
1370 xdr_encode_opaque(p, fh->data, len);
1371 hdr->nops++;
1372 hdr->replen += decode_putfh_maxsz;
1373 }
1374
1375 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1376 {
1377 __be32 *p;
1378
1379 p = reserve_space(xdr, 4);
1380 *p = cpu_to_be32(OP_PUTROOTFH);
1381 hdr->nops++;
1382 hdr->replen += decode_putrootfh_maxsz;
1383 }
1384
1385 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1386 {
1387 nfs4_stateid stateid;
1388 __be32 *p;
1389
1390 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1391 if (ctx->state != NULL) {
1392 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1393 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1394 } else
1395 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1396 }
1397
1398 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1399 {
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 *p = cpu_to_be32(OP_READ);
1404
1405 encode_stateid(xdr, args->context, args->lock_context);
1406
1407 p = reserve_space(xdr, 12);
1408 p = xdr_encode_hyper(p, args->offset);
1409 *p = cpu_to_be32(args->count);
1410 hdr->nops++;
1411 hdr->replen += decode_read_maxsz;
1412 }
1413
1414 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1415 {
1416 uint32_t attrs[2] = {0, 0};
1417 uint32_t dircount = readdir->count >> 1;
1418 __be32 *p;
1419
1420 if (readdir->plus) {
1421 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1422 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1423 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1424 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1425 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1426 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1427 dircount >>= 1;
1428 }
1429 attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1430 attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1431 /* Switch to mounted_on_fileid if the server supports it */
1432 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1433 attrs[0] &= ~FATTR4_WORD0_FILEID;
1434 else
1435 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1436
1437 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1438 *p++ = cpu_to_be32(OP_READDIR);
1439 p = xdr_encode_hyper(p, readdir->cookie);
1440 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1441 *p++ = cpu_to_be32(dircount);
1442 *p++ = cpu_to_be32(readdir->count);
1443 *p++ = cpu_to_be32(2);
1444
1445 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1446 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1447 hdr->nops++;
1448 hdr->replen += decode_readdir_maxsz;
1449 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1450 __func__,
1451 (unsigned long long)readdir->cookie,
1452 ((u32 *)readdir->verifier.data)[0],
1453 ((u32 *)readdir->verifier.data)[1],
1454 attrs[0] & readdir->bitmask[0],
1455 attrs[1] & readdir->bitmask[1]);
1456 }
1457
1458 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1459 {
1460 __be32 *p;
1461
1462 p = reserve_space(xdr, 4);
1463 *p = cpu_to_be32(OP_READLINK);
1464 hdr->nops++;
1465 hdr->replen += decode_readlink_maxsz;
1466 }
1467
1468 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1469 {
1470 __be32 *p;
1471
1472 p = reserve_space(xdr, 8 + name->len);
1473 *p++ = cpu_to_be32(OP_REMOVE);
1474 xdr_encode_opaque(p, name->name, name->len);
1475 hdr->nops++;
1476 hdr->replen += decode_remove_maxsz;
1477 }
1478
1479 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(OP_RENAME);
1485 encode_string(xdr, oldname->len, oldname->name);
1486 encode_string(xdr, newname->len, newname->name);
1487 hdr->nops++;
1488 hdr->replen += decode_rename_maxsz;
1489 }
1490
1491 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1492 {
1493 __be32 *p;
1494
1495 p = reserve_space(xdr, 12);
1496 *p++ = cpu_to_be32(OP_RENEW);
1497 xdr_encode_hyper(p, client_stateid->cl_clientid);
1498 hdr->nops++;
1499 hdr->replen += decode_renew_maxsz;
1500 }
1501
1502 static void
1503 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504 {
1505 __be32 *p;
1506
1507 p = reserve_space(xdr, 4);
1508 *p = cpu_to_be32(OP_RESTOREFH);
1509 hdr->nops++;
1510 hdr->replen += decode_restorefh_maxsz;
1511 }
1512
1513 static void
1514 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1515 {
1516 __be32 *p;
1517
1518 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1519 *p++ = cpu_to_be32(OP_SETATTR);
1520 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1521 p = reserve_space(xdr, 2*4);
1522 *p++ = cpu_to_be32(1);
1523 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1524 BUG_ON(arg->acl_len % 4);
1525 p = reserve_space(xdr, 4);
1526 *p = cpu_to_be32(arg->acl_len);
1527 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1528 hdr->nops++;
1529 hdr->replen += decode_setacl_maxsz;
1530 }
1531
1532 static void
1533 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1534 {
1535 __be32 *p;
1536
1537 p = reserve_space(xdr, 4);
1538 *p = cpu_to_be32(OP_SAVEFH);
1539 hdr->nops++;
1540 hdr->replen += decode_savefh_maxsz;
1541 }
1542
1543 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1544 {
1545 __be32 *p;
1546
1547 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1548 *p++ = cpu_to_be32(OP_SETATTR);
1549 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1550 hdr->nops++;
1551 hdr->replen += decode_setattr_maxsz;
1552 encode_attrs(xdr, arg->iap, server);
1553 }
1554
1555 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1556 {
1557 __be32 *p;
1558
1559 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1560 *p++ = cpu_to_be32(OP_SETCLIENTID);
1561 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1562
1563 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1564 p = reserve_space(xdr, 4);
1565 *p = cpu_to_be32(setclientid->sc_prog);
1566 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1567 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1568 p = reserve_space(xdr, 4);
1569 *p = cpu_to_be32(setclientid->sc_cb_ident);
1570 hdr->nops++;
1571 hdr->replen += decode_setclientid_maxsz;
1572 }
1573
1574 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1575 {
1576 __be32 *p;
1577
1578 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1579 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1580 p = xdr_encode_hyper(p, arg->clientid);
1581 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1582 hdr->nops++;
1583 hdr->replen += decode_setclientid_confirm_maxsz;
1584 }
1585
1586 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1587 {
1588 __be32 *p;
1589
1590 p = reserve_space(xdr, 4);
1591 *p = cpu_to_be32(OP_WRITE);
1592
1593 encode_stateid(xdr, args->context, args->lock_context);
1594
1595 p = reserve_space(xdr, 16);
1596 p = xdr_encode_hyper(p, args->offset);
1597 *p++ = cpu_to_be32(args->stable);
1598 *p = cpu_to_be32(args->count);
1599
1600 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1601 hdr->nops++;
1602 hdr->replen += decode_write_maxsz;
1603 }
1604
1605 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1606 {
1607 __be32 *p;
1608
1609 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1610
1611 *p++ = cpu_to_be32(OP_DELEGRETURN);
1612 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1613 hdr->nops++;
1614 hdr->replen += decode_delegreturn_maxsz;
1615 }
1616
1617 #if defined(CONFIG_NFS_V4_1)
1618 /* NFSv4.1 operations */
1619 static void encode_exchange_id(struct xdr_stream *xdr,
1620 struct nfs41_exchange_id_args *args,
1621 struct compound_hdr *hdr)
1622 {
1623 __be32 *p;
1624
1625 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1626 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1627 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1628
1629 encode_string(xdr, args->id_len, args->id);
1630
1631 p = reserve_space(xdr, 12);
1632 *p++ = cpu_to_be32(args->flags);
1633 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1634 *p = cpu_to_be32(0); /* zero length implementation id array */
1635 hdr->nops++;
1636 hdr->replen += decode_exchange_id_maxsz;
1637 }
1638
1639 static void encode_create_session(struct xdr_stream *xdr,
1640 struct nfs41_create_session_args *args,
1641 struct compound_hdr *hdr)
1642 {
1643 __be32 *p;
1644 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1645 uint32_t len;
1646 struct nfs_client *clp = args->client;
1647 u32 max_resp_sz_cached;
1648
1649 /*
1650 * Assumes OPEN is the biggest non-idempotent compound.
1651 * 2 is the verifier.
1652 */
1653 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1654 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1655
1656 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1657 clp->cl_ipaddr);
1658
1659 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1660 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1661 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1662 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1663 *p++ = cpu_to_be32(args->flags); /*flags */
1664
1665 /* Fore Channel */
1666 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1667 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1668 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1669 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1670 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1671 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1672 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1673
1674 /* Back Channel */
1675 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1676 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1677 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1678 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1679 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1680 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1681 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1682
1683 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1684 *p++ = cpu_to_be32(1);
1685 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1686
1687 /* authsys_parms rfc1831 */
1688 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1689 p = xdr_encode_opaque(p, machine_name, len);
1690 *p++ = cpu_to_be32(0); /* UID */
1691 *p++ = cpu_to_be32(0); /* GID */
1692 *p = cpu_to_be32(0); /* No more gids */
1693 hdr->nops++;
1694 hdr->replen += decode_create_session_maxsz;
1695 }
1696
1697 static void encode_destroy_session(struct xdr_stream *xdr,
1698 struct nfs4_session *session,
1699 struct compound_hdr *hdr)
1700 {
1701 __be32 *p;
1702 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1703 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1704 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1705 hdr->nops++;
1706 hdr->replen += decode_destroy_session_maxsz;
1707 }
1708
1709 static void encode_reclaim_complete(struct xdr_stream *xdr,
1710 struct nfs41_reclaim_complete_args *args,
1711 struct compound_hdr *hdr)
1712 {
1713 __be32 *p;
1714
1715 p = reserve_space(xdr, 8);
1716 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1717 *p++ = cpu_to_be32(args->one_fs);
1718 hdr->nops++;
1719 hdr->replen += decode_reclaim_complete_maxsz;
1720 }
1721 #endif /* CONFIG_NFS_V4_1 */
1722
1723 static void encode_sequence(struct xdr_stream *xdr,
1724 const struct nfs4_sequence_args *args,
1725 struct compound_hdr *hdr)
1726 {
1727 #if defined(CONFIG_NFS_V4_1)
1728 struct nfs4_session *session = args->sa_session;
1729 struct nfs4_slot_table *tp;
1730 struct nfs4_slot *slot;
1731 __be32 *p;
1732
1733 if (!session)
1734 return;
1735
1736 tp = &session->fc_slot_table;
1737
1738 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1739 slot = tp->slots + args->sa_slotid;
1740
1741 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1742 *p++ = cpu_to_be32(OP_SEQUENCE);
1743
1744 /*
1745 * Sessionid + seqid + slotid + max slotid + cache_this
1746 */
1747 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1748 "max_slotid=%d cache_this=%d\n",
1749 __func__,
1750 ((u32 *)session->sess_id.data)[0],
1751 ((u32 *)session->sess_id.data)[1],
1752 ((u32 *)session->sess_id.data)[2],
1753 ((u32 *)session->sess_id.data)[3],
1754 slot->seq_nr, args->sa_slotid,
1755 tp->highest_used_slotid, args->sa_cache_this);
1756 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1757 *p++ = cpu_to_be32(slot->seq_nr);
1758 *p++ = cpu_to_be32(args->sa_slotid);
1759 *p++ = cpu_to_be32(tp->highest_used_slotid);
1760 *p = cpu_to_be32(args->sa_cache_this);
1761 hdr->nops++;
1762 hdr->replen += decode_sequence_maxsz;
1763 #endif /* CONFIG_NFS_V4_1 */
1764 }
1765
1766 #ifdef CONFIG_NFS_V4_1
1767 static void
1768 encode_getdeviceinfo(struct xdr_stream *xdr,
1769 const struct nfs4_getdeviceinfo_args *args,
1770 struct compound_hdr *hdr)
1771 {
1772 __be32 *p;
1773
1774 p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1775 *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1776 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1777 NFS4_DEVICEID4_SIZE);
1778 *p++ = cpu_to_be32(args->pdev->layout_type);
1779 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1780 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1781 hdr->nops++;
1782 hdr->replen += decode_getdeviceinfo_maxsz;
1783 }
1784
1785 static void
1786 encode_layoutget(struct xdr_stream *xdr,
1787 const struct nfs4_layoutget_args *args,
1788 struct compound_hdr *hdr)
1789 {
1790 nfs4_stateid stateid;
1791 __be32 *p;
1792
1793 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1794 *p++ = cpu_to_be32(OP_LAYOUTGET);
1795 *p++ = cpu_to_be32(0); /* Signal layout available */
1796 *p++ = cpu_to_be32(args->type);
1797 *p++ = cpu_to_be32(args->range.iomode);
1798 p = xdr_encode_hyper(p, args->range.offset);
1799 p = xdr_encode_hyper(p, args->range.length);
1800 p = xdr_encode_hyper(p, args->minlength);
1801 pnfs_get_layout_stateid(&stateid, NFS_I(args->inode)->layout,
1802 args->ctx->state);
1803 p = xdr_encode_opaque_fixed(p, &stateid.data, NFS4_STATEID_SIZE);
1804 *p = cpu_to_be32(args->maxcount);
1805
1806 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1807 __func__,
1808 args->type,
1809 args->range.iomode,
1810 (unsigned long)args->range.offset,
1811 (unsigned long)args->range.length,
1812 args->maxcount);
1813 hdr->nops++;
1814 hdr->replen += decode_layoutget_maxsz;
1815 }
1816 #endif /* CONFIG_NFS_V4_1 */
1817
1818 /*
1819 * END OF "GENERIC" ENCODE ROUTINES.
1820 */
1821
1822 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1823 {
1824 #if defined(CONFIG_NFS_V4_1)
1825 if (args->sa_session)
1826 return args->sa_session->clp->cl_mvops->minor_version;
1827 #endif /* CONFIG_NFS_V4_1 */
1828 return 0;
1829 }
1830
1831 /*
1832 * Encode an ACCESS request
1833 */
1834 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1835 const struct nfs4_accessargs *args)
1836 {
1837 struct compound_hdr hdr = {
1838 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1839 };
1840
1841 encode_compound_hdr(xdr, req, &hdr);
1842 encode_sequence(xdr, &args->seq_args, &hdr);
1843 encode_putfh(xdr, args->fh, &hdr);
1844 encode_access(xdr, args->access, &hdr);
1845 encode_getfattr(xdr, args->bitmask, &hdr);
1846 encode_nops(&hdr);
1847 }
1848
1849 /*
1850 * Encode LOOKUP request
1851 */
1852 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1853 const struct nfs4_lookup_arg *args)
1854 {
1855 struct compound_hdr hdr = {
1856 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1857 };
1858
1859 encode_compound_hdr(xdr, req, &hdr);
1860 encode_sequence(xdr, &args->seq_args, &hdr);
1861 encode_putfh(xdr, args->dir_fh, &hdr);
1862 encode_lookup(xdr, args->name, &hdr);
1863 encode_getfh(xdr, &hdr);
1864 encode_getfattr(xdr, args->bitmask, &hdr);
1865 encode_nops(&hdr);
1866 }
1867
1868 /*
1869 * Encode LOOKUP_ROOT request
1870 */
1871 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1872 struct xdr_stream *xdr,
1873 const struct nfs4_lookup_root_arg *args)
1874 {
1875 struct compound_hdr hdr = {
1876 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1877 };
1878
1879 encode_compound_hdr(xdr, req, &hdr);
1880 encode_sequence(xdr, &args->seq_args, &hdr);
1881 encode_putrootfh(xdr, &hdr);
1882 encode_getfh(xdr, &hdr);
1883 encode_getfattr(xdr, args->bitmask, &hdr);
1884 encode_nops(&hdr);
1885 }
1886
1887 /*
1888 * Encode REMOVE request
1889 */
1890 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1891 const struct nfs_removeargs *args)
1892 {
1893 struct compound_hdr hdr = {
1894 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1895 };
1896
1897 encode_compound_hdr(xdr, req, &hdr);
1898 encode_sequence(xdr, &args->seq_args, &hdr);
1899 encode_putfh(xdr, args->fh, &hdr);
1900 encode_remove(xdr, &args->name, &hdr);
1901 encode_getfattr(xdr, args->bitmask, &hdr);
1902 encode_nops(&hdr);
1903 }
1904
1905 /*
1906 * Encode RENAME request
1907 */
1908 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1909 const struct nfs_renameargs *args)
1910 {
1911 struct compound_hdr hdr = {
1912 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1913 };
1914
1915 encode_compound_hdr(xdr, req, &hdr);
1916 encode_sequence(xdr, &args->seq_args, &hdr);
1917 encode_putfh(xdr, args->old_dir, &hdr);
1918 encode_savefh(xdr, &hdr);
1919 encode_putfh(xdr, args->new_dir, &hdr);
1920 encode_rename(xdr, args->old_name, args->new_name, &hdr);
1921 encode_getfattr(xdr, args->bitmask, &hdr);
1922 encode_restorefh(xdr, &hdr);
1923 encode_getfattr(xdr, args->bitmask, &hdr);
1924 encode_nops(&hdr);
1925 }
1926
1927 /*
1928 * Encode LINK request
1929 */
1930 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
1931 const struct nfs4_link_arg *args)
1932 {
1933 struct compound_hdr hdr = {
1934 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1935 };
1936
1937 encode_compound_hdr(xdr, req, &hdr);
1938 encode_sequence(xdr, &args->seq_args, &hdr);
1939 encode_putfh(xdr, args->fh, &hdr);
1940 encode_savefh(xdr, &hdr);
1941 encode_putfh(xdr, args->dir_fh, &hdr);
1942 encode_link(xdr, args->name, &hdr);
1943 encode_getfattr(xdr, args->bitmask, &hdr);
1944 encode_restorefh(xdr, &hdr);
1945 encode_getfattr(xdr, args->bitmask, &hdr);
1946 encode_nops(&hdr);
1947 }
1948
1949 /*
1950 * Encode CREATE request
1951 */
1952 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
1953 const struct nfs4_create_arg *args)
1954 {
1955 struct compound_hdr hdr = {
1956 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1957 };
1958
1959 encode_compound_hdr(xdr, req, &hdr);
1960 encode_sequence(xdr, &args->seq_args, &hdr);
1961 encode_putfh(xdr, args->dir_fh, &hdr);
1962 encode_savefh(xdr, &hdr);
1963 encode_create(xdr, args, &hdr);
1964 encode_getfh(xdr, &hdr);
1965 encode_getfattr(xdr, args->bitmask, &hdr);
1966 encode_restorefh(xdr, &hdr);
1967 encode_getfattr(xdr, args->bitmask, &hdr);
1968 encode_nops(&hdr);
1969 }
1970
1971 /*
1972 * Encode SYMLINK request
1973 */
1974 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
1975 const struct nfs4_create_arg *args)
1976 {
1977 nfs4_xdr_enc_create(req, xdr, args);
1978 }
1979
1980 /*
1981 * Encode GETATTR request
1982 */
1983 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
1984 const struct nfs4_getattr_arg *args)
1985 {
1986 struct compound_hdr hdr = {
1987 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1988 };
1989
1990 encode_compound_hdr(xdr, req, &hdr);
1991 encode_sequence(xdr, &args->seq_args, &hdr);
1992 encode_putfh(xdr, args->fh, &hdr);
1993 encode_getfattr(xdr, args->bitmask, &hdr);
1994 encode_nops(&hdr);
1995 }
1996
1997 /*
1998 * Encode a CLOSE request
1999 */
2000 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2001 struct nfs_closeargs *args)
2002 {
2003 struct compound_hdr hdr = {
2004 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2005 };
2006
2007 encode_compound_hdr(xdr, req, &hdr);
2008 encode_sequence(xdr, &args->seq_args, &hdr);
2009 encode_putfh(xdr, args->fh, &hdr);
2010 encode_close(xdr, args, &hdr);
2011 encode_getfattr(xdr, args->bitmask, &hdr);
2012 encode_nops(&hdr);
2013 }
2014
2015 /*
2016 * Encode an OPEN request
2017 */
2018 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2019 struct nfs_openargs *args)
2020 {
2021 struct compound_hdr hdr = {
2022 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023 };
2024
2025 encode_compound_hdr(xdr, req, &hdr);
2026 encode_sequence(xdr, &args->seq_args, &hdr);
2027 encode_putfh(xdr, args->fh, &hdr);
2028 encode_savefh(xdr, &hdr);
2029 encode_open(xdr, args, &hdr);
2030 encode_getfh(xdr, &hdr);
2031 encode_getfattr(xdr, args->bitmask, &hdr);
2032 encode_restorefh(xdr, &hdr);
2033 encode_getfattr(xdr, args->bitmask, &hdr);
2034 encode_nops(&hdr);
2035 }
2036
2037 /*
2038 * Encode an OPEN_CONFIRM request
2039 */
2040 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2041 struct xdr_stream *xdr,
2042 struct nfs_open_confirmargs *args)
2043 {
2044 struct compound_hdr hdr = {
2045 .nops = 0,
2046 };
2047
2048 encode_compound_hdr(xdr, req, &hdr);
2049 encode_putfh(xdr, args->fh, &hdr);
2050 encode_open_confirm(xdr, args, &hdr);
2051 encode_nops(&hdr);
2052 }
2053
2054 /*
2055 * Encode an OPEN request with no attributes.
2056 */
2057 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2058 struct xdr_stream *xdr,
2059 struct nfs_openargs *args)
2060 {
2061 struct compound_hdr hdr = {
2062 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2063 };
2064
2065 encode_compound_hdr(xdr, req, &hdr);
2066 encode_sequence(xdr, &args->seq_args, &hdr);
2067 encode_putfh(xdr, args->fh, &hdr);
2068 encode_open(xdr, args, &hdr);
2069 encode_getfattr(xdr, args->bitmask, &hdr);
2070 encode_nops(&hdr);
2071 }
2072
2073 /*
2074 * Encode an OPEN_DOWNGRADE request
2075 */
2076 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2077 struct xdr_stream *xdr,
2078 struct nfs_closeargs *args)
2079 {
2080 struct compound_hdr hdr = {
2081 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082 };
2083
2084 encode_compound_hdr(xdr, req, &hdr);
2085 encode_sequence(xdr, &args->seq_args, &hdr);
2086 encode_putfh(xdr, args->fh, &hdr);
2087 encode_open_downgrade(xdr, args, &hdr);
2088 encode_getfattr(xdr, args->bitmask, &hdr);
2089 encode_nops(&hdr);
2090 }
2091
2092 /*
2093 * Encode a LOCK request
2094 */
2095 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2096 struct nfs_lock_args *args)
2097 {
2098 struct compound_hdr hdr = {
2099 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2100 };
2101
2102 encode_compound_hdr(xdr, req, &hdr);
2103 encode_sequence(xdr, &args->seq_args, &hdr);
2104 encode_putfh(xdr, args->fh, &hdr);
2105 encode_lock(xdr, args, &hdr);
2106 encode_nops(&hdr);
2107 }
2108
2109 /*
2110 * Encode a LOCKT request
2111 */
2112 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2113 struct nfs_lockt_args *args)
2114 {
2115 struct compound_hdr hdr = {
2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117 };
2118
2119 encode_compound_hdr(xdr, req, &hdr);
2120 encode_sequence(xdr, &args->seq_args, &hdr);
2121 encode_putfh(xdr, args->fh, &hdr);
2122 encode_lockt(xdr, args, &hdr);
2123 encode_nops(&hdr);
2124 }
2125
2126 /*
2127 * Encode a LOCKU request
2128 */
2129 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2130 struct nfs_locku_args *args)
2131 {
2132 struct compound_hdr hdr = {
2133 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134 };
2135
2136 encode_compound_hdr(xdr, req, &hdr);
2137 encode_sequence(xdr, &args->seq_args, &hdr);
2138 encode_putfh(xdr, args->fh, &hdr);
2139 encode_locku(xdr, args, &hdr);
2140 encode_nops(&hdr);
2141 }
2142
2143 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2144 struct xdr_stream *xdr,
2145 struct nfs_release_lockowner_args *args)
2146 {
2147 struct compound_hdr hdr = {
2148 .minorversion = 0,
2149 };
2150
2151 encode_compound_hdr(xdr, req, &hdr);
2152 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2153 encode_nops(&hdr);
2154 }
2155
2156 /*
2157 * Encode a READLINK request
2158 */
2159 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2160 const struct nfs4_readlink *args)
2161 {
2162 struct compound_hdr hdr = {
2163 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2164 };
2165
2166 encode_compound_hdr(xdr, req, &hdr);
2167 encode_sequence(xdr, &args->seq_args, &hdr);
2168 encode_putfh(xdr, args->fh, &hdr);
2169 encode_readlink(xdr, args, req, &hdr);
2170
2171 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2172 args->pgbase, args->pglen);
2173 encode_nops(&hdr);
2174 }
2175
2176 /*
2177 * Encode a READDIR request
2178 */
2179 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2180 const struct nfs4_readdir_arg *args)
2181 {
2182 struct compound_hdr hdr = {
2183 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184 };
2185
2186 encode_compound_hdr(xdr, req, &hdr);
2187 encode_sequence(xdr, &args->seq_args, &hdr);
2188 encode_putfh(xdr, args->fh, &hdr);
2189 encode_readdir(xdr, args, req, &hdr);
2190
2191 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2192 args->pgbase, args->count);
2193 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2194 __func__, hdr.replen << 2, args->pages,
2195 args->pgbase, args->count);
2196 encode_nops(&hdr);
2197 }
2198
2199 /*
2200 * Encode a READ request
2201 */
2202 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2203 struct nfs_readargs *args)
2204 {
2205 struct compound_hdr hdr = {
2206 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2207 };
2208
2209 encode_compound_hdr(xdr, req, &hdr);
2210 encode_sequence(xdr, &args->seq_args, &hdr);
2211 encode_putfh(xdr, args->fh, &hdr);
2212 encode_read(xdr, args, &hdr);
2213
2214 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2215 args->pages, args->pgbase, args->count);
2216 req->rq_rcv_buf.flags |= XDRBUF_READ;
2217 encode_nops(&hdr);
2218 }
2219
2220 /*
2221 * Encode an SETATTR request
2222 */
2223 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2224 struct nfs_setattrargs *args)
2225 {
2226 struct compound_hdr hdr = {
2227 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228 };
2229
2230 encode_compound_hdr(xdr, req, &hdr);
2231 encode_sequence(xdr, &args->seq_args, &hdr);
2232 encode_putfh(xdr, args->fh, &hdr);
2233 encode_setattr(xdr, args, args->server, &hdr);
2234 encode_getfattr(xdr, args->bitmask, &hdr);
2235 encode_nops(&hdr);
2236 }
2237
2238 /*
2239 * Encode a GETACL request
2240 */
2241 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2242 struct nfs_getaclargs *args)
2243 {
2244 struct compound_hdr hdr = {
2245 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2246 };
2247 uint32_t replen;
2248
2249 encode_compound_hdr(xdr, req, &hdr);
2250 encode_sequence(xdr, &args->seq_args, &hdr);
2251 encode_putfh(xdr, args->fh, &hdr);
2252 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2253 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2254
2255 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2256 args->acl_pages, args->acl_pgbase, args->acl_len);
2257 encode_nops(&hdr);
2258 }
2259
2260 /*
2261 * Encode a WRITE request
2262 */
2263 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2264 struct nfs_writeargs *args)
2265 {
2266 struct compound_hdr hdr = {
2267 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2268 };
2269
2270 encode_compound_hdr(xdr, req, &hdr);
2271 encode_sequence(xdr, &args->seq_args, &hdr);
2272 encode_putfh(xdr, args->fh, &hdr);
2273 encode_write(xdr, args, &hdr);
2274 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2275 encode_getfattr(xdr, args->bitmask, &hdr);
2276 encode_nops(&hdr);
2277 }
2278
2279 /*
2280 * a COMMIT request
2281 */
2282 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2283 struct nfs_writeargs *args)
2284 {
2285 struct compound_hdr hdr = {
2286 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2287 };
2288
2289 encode_compound_hdr(xdr, req, &hdr);
2290 encode_sequence(xdr, &args->seq_args, &hdr);
2291 encode_putfh(xdr, args->fh, &hdr);
2292 encode_commit(xdr, args, &hdr);
2293 encode_getfattr(xdr, args->bitmask, &hdr);
2294 encode_nops(&hdr);
2295 }
2296
2297 /*
2298 * FSINFO request
2299 */
2300 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2301 struct nfs4_fsinfo_arg *args)
2302 {
2303 struct compound_hdr hdr = {
2304 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2305 };
2306
2307 encode_compound_hdr(xdr, req, &hdr);
2308 encode_sequence(xdr, &args->seq_args, &hdr);
2309 encode_putfh(xdr, args->fh, &hdr);
2310 encode_fsinfo(xdr, args->bitmask, &hdr);
2311 encode_nops(&hdr);
2312 }
2313
2314 /*
2315 * a PATHCONF request
2316 */
2317 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2318 const struct nfs4_pathconf_arg *args)
2319 {
2320 struct compound_hdr hdr = {
2321 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2322 };
2323
2324 encode_compound_hdr(xdr, req, &hdr);
2325 encode_sequence(xdr, &args->seq_args, &hdr);
2326 encode_putfh(xdr, args->fh, &hdr);
2327 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2328 &hdr);
2329 encode_nops(&hdr);
2330 }
2331
2332 /*
2333 * a STATFS request
2334 */
2335 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2336 const struct nfs4_statfs_arg *args)
2337 {
2338 struct compound_hdr hdr = {
2339 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2340 };
2341
2342 encode_compound_hdr(xdr, req, &hdr);
2343 encode_sequence(xdr, &args->seq_args, &hdr);
2344 encode_putfh(xdr, args->fh, &hdr);
2345 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2346 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2347 encode_nops(&hdr);
2348 }
2349
2350 /*
2351 * GETATTR_BITMAP request
2352 */
2353 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2354 struct xdr_stream *xdr,
2355 struct nfs4_server_caps_arg *args)
2356 {
2357 struct compound_hdr hdr = {
2358 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2359 };
2360
2361 encode_compound_hdr(xdr, req, &hdr);
2362 encode_sequence(xdr, &args->seq_args, &hdr);
2363 encode_putfh(xdr, args->fhandle, &hdr);
2364 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2365 FATTR4_WORD0_LINK_SUPPORT|
2366 FATTR4_WORD0_SYMLINK_SUPPORT|
2367 FATTR4_WORD0_ACLSUPPORT, &hdr);
2368 encode_nops(&hdr);
2369 }
2370
2371 /*
2372 * a RENEW request
2373 */
2374 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2375 struct nfs_client *clp)
2376 {
2377 struct compound_hdr hdr = {
2378 .nops = 0,
2379 };
2380
2381 encode_compound_hdr(xdr, req, &hdr);
2382 encode_renew(xdr, clp, &hdr);
2383 encode_nops(&hdr);
2384 }
2385
2386 /*
2387 * a SETCLIENTID request
2388 */
2389 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2390 struct xdr_stream *xdr,
2391 struct nfs4_setclientid *sc)
2392 {
2393 struct compound_hdr hdr = {
2394 .nops = 0,
2395 };
2396
2397 encode_compound_hdr(xdr, req, &hdr);
2398 encode_setclientid(xdr, sc, &hdr);
2399 encode_nops(&hdr);
2400 }
2401
2402 /*
2403 * a SETCLIENTID_CONFIRM request
2404 */
2405 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2406 struct xdr_stream *xdr,
2407 struct nfs4_setclientid_res *arg)
2408 {
2409 struct compound_hdr hdr = {
2410 .nops = 0,
2411 };
2412 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2413
2414 encode_compound_hdr(xdr, req, &hdr);
2415 encode_setclientid_confirm(xdr, arg, &hdr);
2416 encode_putrootfh(xdr, &hdr);
2417 encode_fsinfo(xdr, lease_bitmap, &hdr);
2418 encode_nops(&hdr);
2419 }
2420
2421 /*
2422 * DELEGRETURN request
2423 */
2424 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2425 struct xdr_stream *xdr,
2426 const struct nfs4_delegreturnargs *args)
2427 {
2428 struct compound_hdr hdr = {
2429 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2430 };
2431
2432 encode_compound_hdr(xdr, req, &hdr);
2433 encode_sequence(xdr, &args->seq_args, &hdr);
2434 encode_putfh(xdr, args->fhandle, &hdr);
2435 encode_delegreturn(xdr, args->stateid, &hdr);
2436 encode_getfattr(xdr, args->bitmask, &hdr);
2437 encode_nops(&hdr);
2438 }
2439
2440 /*
2441 * Encode FS_LOCATIONS request
2442 */
2443 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2444 struct xdr_stream *xdr,
2445 struct nfs4_fs_locations_arg *args)
2446 {
2447 struct compound_hdr hdr = {
2448 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449 };
2450 uint32_t replen;
2451
2452 encode_compound_hdr(xdr, req, &hdr);
2453 encode_sequence(xdr, &args->seq_args, &hdr);
2454 encode_putfh(xdr, args->dir_fh, &hdr);
2455 encode_lookup(xdr, args->name, &hdr);
2456 replen = hdr.replen; /* get the attribute into args->page */
2457 encode_fs_locations(xdr, args->bitmask, &hdr);
2458
2459 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2460 0, PAGE_SIZE);
2461 encode_nops(&hdr);
2462 }
2463
2464 #if defined(CONFIG_NFS_V4_1)
2465 /*
2466 * EXCHANGE_ID request
2467 */
2468 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2469 struct xdr_stream *xdr,
2470 struct nfs41_exchange_id_args *args)
2471 {
2472 struct compound_hdr hdr = {
2473 .minorversion = args->client->cl_mvops->minor_version,
2474 };
2475
2476 encode_compound_hdr(xdr, req, &hdr);
2477 encode_exchange_id(xdr, args, &hdr);
2478 encode_nops(&hdr);
2479 }
2480
2481 /*
2482 * a CREATE_SESSION request
2483 */
2484 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2485 struct xdr_stream *xdr,
2486 struct nfs41_create_session_args *args)
2487 {
2488 struct compound_hdr hdr = {
2489 .minorversion = args->client->cl_mvops->minor_version,
2490 };
2491
2492 encode_compound_hdr(xdr, req, &hdr);
2493 encode_create_session(xdr, args, &hdr);
2494 encode_nops(&hdr);
2495 }
2496
2497 /*
2498 * a DESTROY_SESSION request
2499 */
2500 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2501 struct xdr_stream *xdr,
2502 struct nfs4_session *session)
2503 {
2504 struct compound_hdr hdr = {
2505 .minorversion = session->clp->cl_mvops->minor_version,
2506 };
2507
2508 encode_compound_hdr(xdr, req, &hdr);
2509 encode_destroy_session(xdr, session, &hdr);
2510 encode_nops(&hdr);
2511 }
2512
2513 /*
2514 * a SEQUENCE request
2515 */
2516 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs4_sequence_args *args)
2518 {
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(args),
2521 };
2522
2523 encode_compound_hdr(xdr, req, &hdr);
2524 encode_sequence(xdr, args, &hdr);
2525 encode_nops(&hdr);
2526 }
2527
2528 /*
2529 * a GET_LEASE_TIME request
2530 */
2531 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2532 struct xdr_stream *xdr,
2533 struct nfs4_get_lease_time_args *args)
2534 {
2535 struct compound_hdr hdr = {
2536 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2537 };
2538 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2539
2540 encode_compound_hdr(xdr, req, &hdr);
2541 encode_sequence(xdr, &args->la_seq_args, &hdr);
2542 encode_putrootfh(xdr, &hdr);
2543 encode_fsinfo(xdr, lease_bitmap, &hdr);
2544 encode_nops(&hdr);
2545 }
2546
2547 /*
2548 * a RECLAIM_COMPLETE request
2549 */
2550 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2551 struct xdr_stream *xdr,
2552 struct nfs41_reclaim_complete_args *args)
2553 {
2554 struct compound_hdr hdr = {
2555 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2556 };
2557
2558 encode_compound_hdr(xdr, req, &hdr);
2559 encode_sequence(xdr, &args->seq_args, &hdr);
2560 encode_reclaim_complete(xdr, args, &hdr);
2561 encode_nops(&hdr);
2562 }
2563
2564 /*
2565 * Encode GETDEVICEINFO request
2566 */
2567 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2568 struct xdr_stream *xdr,
2569 struct nfs4_getdeviceinfo_args *args)
2570 {
2571 struct compound_hdr hdr = {
2572 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2573 };
2574
2575 encode_compound_hdr(xdr, req, &hdr);
2576 encode_sequence(xdr, &args->seq_args, &hdr);
2577 encode_getdeviceinfo(xdr, args, &hdr);
2578
2579 /* set up reply kvec. Subtract notification bitmap max size (2)
2580 * so that notification bitmap is put in xdr_buf tail */
2581 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2582 args->pdev->pages, args->pdev->pgbase,
2583 args->pdev->pglen);
2584
2585 encode_nops(&hdr);
2586 }
2587
2588 /*
2589 * Encode LAYOUTGET request
2590 */
2591 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2592 struct xdr_stream *xdr,
2593 struct nfs4_layoutget_args *args)
2594 {
2595 struct compound_hdr hdr = {
2596 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597 };
2598
2599 encode_compound_hdr(xdr, req, &hdr);
2600 encode_sequence(xdr, &args->seq_args, &hdr);
2601 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2602 encode_layoutget(xdr, args, &hdr);
2603 encode_nops(&hdr);
2604 }
2605 #endif /* CONFIG_NFS_V4_1 */
2606
2607 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2608 {
2609 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2610 "Remaining buffer length is %tu words.\n",
2611 func, xdr->end - xdr->p);
2612 }
2613
2614 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2615 {
2616 __be32 *p;
2617
2618 p = xdr_inline_decode(xdr, 4);
2619 if (unlikely(!p))
2620 goto out_overflow;
2621 *len = be32_to_cpup(p);
2622 p = xdr_inline_decode(xdr, *len);
2623 if (unlikely(!p))
2624 goto out_overflow;
2625 *string = (char *)p;
2626 return 0;
2627 out_overflow:
2628 print_overflow_msg(__func__, xdr);
2629 return -EIO;
2630 }
2631
2632 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2633 {
2634 __be32 *p;
2635
2636 p = xdr_inline_decode(xdr, 8);
2637 if (unlikely(!p))
2638 goto out_overflow;
2639 hdr->status = be32_to_cpup(p++);
2640 hdr->taglen = be32_to_cpup(p);
2641
2642 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2643 if (unlikely(!p))
2644 goto out_overflow;
2645 hdr->tag = (char *)p;
2646 p += XDR_QUADLEN(hdr->taglen);
2647 hdr->nops = be32_to_cpup(p);
2648 if (unlikely(hdr->nops < 1))
2649 return nfs4_stat_to_errno(hdr->status);
2650 return 0;
2651 out_overflow:
2652 print_overflow_msg(__func__, xdr);
2653 return -EIO;
2654 }
2655
2656 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2657 {
2658 __be32 *p;
2659 uint32_t opnum;
2660 int32_t nfserr;
2661
2662 p = xdr_inline_decode(xdr, 8);
2663 if (unlikely(!p))
2664 goto out_overflow;
2665 opnum = be32_to_cpup(p++);
2666 if (opnum != expected) {
2667 dprintk("nfs: Server returned operation"
2668 " %d but we issued a request for %d\n",
2669 opnum, expected);
2670 return -EIO;
2671 }
2672 nfserr = be32_to_cpup(p);
2673 if (nfserr != NFS_OK)
2674 return nfs4_stat_to_errno(nfserr);
2675 return 0;
2676 out_overflow:
2677 print_overflow_msg(__func__, xdr);
2678 return -EIO;
2679 }
2680
2681 /* Dummy routine */
2682 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2683 {
2684 __be32 *p;
2685 unsigned int strlen;
2686 char *str;
2687
2688 p = xdr_inline_decode(xdr, 12);
2689 if (likely(p))
2690 return decode_opaque_inline(xdr, &strlen, &str);
2691 print_overflow_msg(__func__, xdr);
2692 return -EIO;
2693 }
2694
2695 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2696 {
2697 uint32_t bmlen;
2698 __be32 *p;
2699
2700 p = xdr_inline_decode(xdr, 4);
2701 if (unlikely(!p))
2702 goto out_overflow;
2703 bmlen = be32_to_cpup(p);
2704
2705 bitmap[0] = bitmap[1] = 0;
2706 p = xdr_inline_decode(xdr, (bmlen << 2));
2707 if (unlikely(!p))
2708 goto out_overflow;
2709 if (bmlen > 0) {
2710 bitmap[0] = be32_to_cpup(p++);
2711 if (bmlen > 1)
2712 bitmap[1] = be32_to_cpup(p);
2713 }
2714 return 0;
2715 out_overflow:
2716 print_overflow_msg(__func__, xdr);
2717 return -EIO;
2718 }
2719
2720 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2721 {
2722 __be32 *p;
2723
2724 p = xdr_inline_decode(xdr, 4);
2725 if (unlikely(!p))
2726 goto out_overflow;
2727 *attrlen = be32_to_cpup(p);
2728 *savep = xdr->p;
2729 return 0;
2730 out_overflow:
2731 print_overflow_msg(__func__, xdr);
2732 return -EIO;
2733 }
2734
2735 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2736 {
2737 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2738 int ret;
2739 ret = decode_attr_bitmap(xdr, bitmask);
2740 if (unlikely(ret < 0))
2741 return ret;
2742 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2743 } else
2744 bitmask[0] = bitmask[1] = 0;
2745 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2746 return 0;
2747 }
2748
2749 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2750 {
2751 __be32 *p;
2752 int ret = 0;
2753
2754 *type = 0;
2755 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2756 return -EIO;
2757 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2758 p = xdr_inline_decode(xdr, 4);
2759 if (unlikely(!p))
2760 goto out_overflow;
2761 *type = be32_to_cpup(p);
2762 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2763 dprintk("%s: bad type %d\n", __func__, *type);
2764 return -EIO;
2765 }
2766 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2767 ret = NFS_ATTR_FATTR_TYPE;
2768 }
2769 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2770 return ret;
2771 out_overflow:
2772 print_overflow_msg(__func__, xdr);
2773 return -EIO;
2774 }
2775
2776 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2777 {
2778 __be32 *p;
2779 int ret = 0;
2780
2781 *change = 0;
2782 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2783 return -EIO;
2784 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2785 p = xdr_inline_decode(xdr, 8);
2786 if (unlikely(!p))
2787 goto out_overflow;
2788 xdr_decode_hyper(p, change);
2789 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2790 ret = NFS_ATTR_FATTR_CHANGE;
2791 }
2792 dprintk("%s: change attribute=%Lu\n", __func__,
2793 (unsigned long long)*change);
2794 return ret;
2795 out_overflow:
2796 print_overflow_msg(__func__, xdr);
2797 return -EIO;
2798 }
2799
2800 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2801 {
2802 __be32 *p;
2803 int ret = 0;
2804
2805 *size = 0;
2806 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2807 return -EIO;
2808 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2809 p = xdr_inline_decode(xdr, 8);
2810 if (unlikely(!p))
2811 goto out_overflow;
2812 xdr_decode_hyper(p, size);
2813 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2814 ret = NFS_ATTR_FATTR_SIZE;
2815 }
2816 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2817 return ret;
2818 out_overflow:
2819 print_overflow_msg(__func__, xdr);
2820 return -EIO;
2821 }
2822
2823 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2824 {
2825 __be32 *p;
2826
2827 *res = 0;
2828 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2829 return -EIO;
2830 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2831 p = xdr_inline_decode(xdr, 4);
2832 if (unlikely(!p))
2833 goto out_overflow;
2834 *res = be32_to_cpup(p);
2835 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2836 }
2837 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2838 return 0;
2839 out_overflow:
2840 print_overflow_msg(__func__, xdr);
2841 return -EIO;
2842 }
2843
2844 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2845 {
2846 __be32 *p;
2847
2848 *res = 0;
2849 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2850 return -EIO;
2851 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2852 p = xdr_inline_decode(xdr, 4);
2853 if (unlikely(!p))
2854 goto out_overflow;
2855 *res = be32_to_cpup(p);
2856 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2857 }
2858 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2859 return 0;
2860 out_overflow:
2861 print_overflow_msg(__func__, xdr);
2862 return -EIO;
2863 }
2864
2865 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2866 {
2867 __be32 *p;
2868 int ret = 0;
2869
2870 fsid->major = 0;
2871 fsid->minor = 0;
2872 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2873 return -EIO;
2874 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2875 p = xdr_inline_decode(xdr, 16);
2876 if (unlikely(!p))
2877 goto out_overflow;
2878 p = xdr_decode_hyper(p, &fsid->major);
2879 xdr_decode_hyper(p, &fsid->minor);
2880 bitmap[0] &= ~FATTR4_WORD0_FSID;
2881 ret = NFS_ATTR_FATTR_FSID;
2882 }
2883 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2884 (unsigned long long)fsid->major,
2885 (unsigned long long)fsid->minor);
2886 return ret;
2887 out_overflow:
2888 print_overflow_msg(__func__, xdr);
2889 return -EIO;
2890 }
2891
2892 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2893 {
2894 __be32 *p;
2895
2896 *res = 60;
2897 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2898 return -EIO;
2899 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2900 p = xdr_inline_decode(xdr, 4);
2901 if (unlikely(!p))
2902 goto out_overflow;
2903 *res = be32_to_cpup(p);
2904 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2905 }
2906 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2907 return 0;
2908 out_overflow:
2909 print_overflow_msg(__func__, xdr);
2910 return -EIO;
2911 }
2912
2913 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2914 {
2915 __be32 *p;
2916
2917 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2918 return -EIO;
2919 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2920 p = xdr_inline_decode(xdr, 4);
2921 if (unlikely(!p))
2922 goto out_overflow;
2923 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2924 }
2925 return 0;
2926 out_overflow:
2927 print_overflow_msg(__func__, xdr);
2928 return -EIO;
2929 }
2930
2931 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2932 {
2933 __be32 *p;
2934 int len;
2935
2936 if (fh != NULL)
2937 memset(fh, 0, sizeof(*fh));
2938
2939 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2940 return -EIO;
2941 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2942 p = xdr_inline_decode(xdr, 4);
2943 if (unlikely(!p))
2944 goto out_overflow;
2945 len = be32_to_cpup(p);
2946 if (len > NFS4_FHSIZE)
2947 return -EIO;
2948 p = xdr_inline_decode(xdr, len);
2949 if (unlikely(!p))
2950 goto out_overflow;
2951 if (fh != NULL) {
2952 memcpy(fh->data, p, len);
2953 fh->size = len;
2954 }
2955 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2956 }
2957 return 0;
2958 out_overflow:
2959 print_overflow_msg(__func__, xdr);
2960 return -EIO;
2961 }
2962
2963 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2964 {
2965 __be32 *p;
2966
2967 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2968 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2969 return -EIO;
2970 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2971 p = xdr_inline_decode(xdr, 4);
2972 if (unlikely(!p))
2973 goto out_overflow;
2974 *res = be32_to_cpup(p);
2975 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2976 }
2977 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2978 return 0;
2979 out_overflow:
2980 print_overflow_msg(__func__, xdr);
2981 return -EIO;
2982 }
2983
2984 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2985 {
2986 __be32 *p;
2987 int ret = 0;
2988
2989 *fileid = 0;
2990 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2991 return -EIO;
2992 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2993 p = xdr_inline_decode(xdr, 8);
2994 if (unlikely(!p))
2995 goto out_overflow;
2996 xdr_decode_hyper(p, fileid);
2997 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2998 ret = NFS_ATTR_FATTR_FILEID;
2999 }
3000 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3001 return ret;
3002 out_overflow:
3003 print_overflow_msg(__func__, xdr);
3004 return -EIO;
3005 }
3006
3007 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3008 {
3009 __be32 *p;
3010 int ret = 0;
3011
3012 *fileid = 0;
3013 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3014 return -EIO;
3015 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3016 p = xdr_inline_decode(xdr, 8);
3017 if (unlikely(!p))
3018 goto out_overflow;
3019 xdr_decode_hyper(p, fileid);
3020 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3021 ret = NFS_ATTR_FATTR_FILEID;
3022 }
3023 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3024 return ret;
3025 out_overflow:
3026 print_overflow_msg(__func__, xdr);
3027 return -EIO;
3028 }
3029
3030 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3031 {
3032 __be32 *p;
3033 int status = 0;
3034
3035 *res = 0;
3036 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3037 return -EIO;
3038 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3039 p = xdr_inline_decode(xdr, 8);
3040 if (unlikely(!p))
3041 goto out_overflow;
3042 xdr_decode_hyper(p, res);
3043 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3044 }
3045 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3046 return status;
3047 out_overflow:
3048 print_overflow_msg(__func__, xdr);
3049 return -EIO;
3050 }
3051
3052 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3053 {
3054 __be32 *p;
3055 int status = 0;
3056
3057 *res = 0;
3058 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3059 return -EIO;
3060 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3061 p = xdr_inline_decode(xdr, 8);
3062 if (unlikely(!p))
3063 goto out_overflow;
3064 xdr_decode_hyper(p, res);
3065 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3066 }
3067 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3068 return status;
3069 out_overflow:
3070 print_overflow_msg(__func__, xdr);
3071 return -EIO;
3072 }
3073
3074 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3075 {
3076 __be32 *p;
3077 int status = 0;
3078
3079 *res = 0;
3080 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3081 return -EIO;
3082 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3083 p = xdr_inline_decode(xdr, 8);
3084 if (unlikely(!p))
3085 goto out_overflow;
3086 xdr_decode_hyper(p, res);
3087 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3088 }
3089 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3090 return status;
3091 out_overflow:
3092 print_overflow_msg(__func__, xdr);
3093 return -EIO;
3094 }
3095
3096 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3097 {
3098 u32 n;
3099 __be32 *p;
3100 int status = 0;
3101
3102 p = xdr_inline_decode(xdr, 4);
3103 if (unlikely(!p))
3104 goto out_overflow;
3105 n = be32_to_cpup(p);
3106 if (n == 0)
3107 goto root_path;
3108 dprintk("path ");
3109 path->ncomponents = 0;
3110 while (path->ncomponents < n) {
3111 struct nfs4_string *component = &path->components[path->ncomponents];
3112 status = decode_opaque_inline(xdr, &component->len, &component->data);
3113 if (unlikely(status != 0))
3114 goto out_eio;
3115 if (path->ncomponents != n)
3116 dprintk("/");
3117 dprintk("%s", component->data);
3118 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3119 path->ncomponents++;
3120 else {
3121 dprintk("cannot parse %d components in path\n", n);
3122 goto out_eio;
3123 }
3124 }
3125 out:
3126 dprintk("\n");
3127 return status;
3128 root_path:
3129 /* a root pathname is sent as a zero component4 */
3130 path->ncomponents = 1;
3131 path->components[0].len=0;
3132 path->components[0].data=NULL;
3133 dprintk("path /\n");
3134 goto out;
3135 out_eio:
3136 dprintk(" status %d", status);
3137 status = -EIO;
3138 goto out;
3139 out_overflow:
3140 print_overflow_msg(__func__, xdr);
3141 return -EIO;
3142 }
3143
3144 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3145 {
3146 int n;
3147 __be32 *p;
3148 int status = -EIO;
3149
3150 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3151 goto out;
3152 status = 0;
3153 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3154 goto out;
3155 dprintk("%s: fsroot ", __func__);
3156 status = decode_pathname(xdr, &res->fs_path);
3157 if (unlikely(status != 0))
3158 goto out;
3159 p = xdr_inline_decode(xdr, 4);
3160 if (unlikely(!p))
3161 goto out_overflow;
3162 n = be32_to_cpup(p);
3163 if (n <= 0)
3164 goto out_eio;
3165 res->nlocations = 0;
3166 while (res->nlocations < n) {
3167 u32 m;
3168 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3169
3170 p = xdr_inline_decode(xdr, 4);
3171 if (unlikely(!p))
3172 goto out_overflow;
3173 m = be32_to_cpup(p);
3174
3175 loc->nservers = 0;
3176 dprintk("%s: servers ", __func__);
3177 while (loc->nservers < m) {
3178 struct nfs4_string *server = &loc->servers[loc->nservers];
3179 status = decode_opaque_inline(xdr, &server->len, &server->data);
3180 if (unlikely(status != 0))
3181 goto out_eio;
3182 dprintk("%s ", server->data);
3183 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3184 loc->nservers++;
3185 else {
3186 unsigned int i;
3187 dprintk("%s: using first %u of %u servers "
3188 "returned for location %u\n",
3189 __func__,
3190 NFS4_FS_LOCATION_MAXSERVERS,
3191 m, res->nlocations);
3192 for (i = loc->nservers; i < m; i++) {
3193 unsigned int len;
3194 char *data;
3195 status = decode_opaque_inline(xdr, &len, &data);
3196 if (unlikely(status != 0))
3197 goto out_eio;
3198 }
3199 }
3200 }
3201 status = decode_pathname(xdr, &loc->rootpath);
3202 if (unlikely(status != 0))
3203 goto out_eio;
3204 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3205 res->nlocations++;
3206 }
3207 if (res->nlocations != 0)
3208 status = NFS_ATTR_FATTR_V4_REFERRAL;
3209 out:
3210 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3211 return status;
3212 out_overflow:
3213 print_overflow_msg(__func__, xdr);
3214 out_eio:
3215 status = -EIO;
3216 goto out;
3217 }
3218
3219 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3220 {
3221 __be32 *p;
3222 int status = 0;
3223
3224 *res = 0;
3225 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3226 return -EIO;
3227 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3228 p = xdr_inline_decode(xdr, 8);
3229 if (unlikely(!p))
3230 goto out_overflow;
3231 xdr_decode_hyper(p, res);
3232 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3233 }
3234 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3235 return status;
3236 out_overflow:
3237 print_overflow_msg(__func__, xdr);
3238 return -EIO;
3239 }
3240
3241 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3242 {
3243 __be32 *p;
3244 int status = 0;
3245
3246 *maxlink = 1;
3247 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3248 return -EIO;
3249 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3250 p = xdr_inline_decode(xdr, 4);
3251 if (unlikely(!p))
3252 goto out_overflow;
3253 *maxlink = be32_to_cpup(p);
3254 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3255 }
3256 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3257 return status;
3258 out_overflow:
3259 print_overflow_msg(__func__, xdr);
3260 return -EIO;
3261 }
3262
3263 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3264 {
3265 __be32 *p;
3266 int status = 0;
3267
3268 *maxname = 1024;
3269 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3270 return -EIO;
3271 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3272 p = xdr_inline_decode(xdr, 4);
3273 if (unlikely(!p))
3274 goto out_overflow;
3275 *maxname = be32_to_cpup(p);
3276 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3277 }
3278 dprintk("%s: maxname=%u\n", __func__, *maxname);
3279 return status;
3280 out_overflow:
3281 print_overflow_msg(__func__, xdr);
3282 return -EIO;
3283 }
3284
3285 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3286 {
3287 __be32 *p;
3288 int status = 0;
3289
3290 *res = 1024;
3291 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3292 return -EIO;
3293 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3294 uint64_t maxread;
3295 p = xdr_inline_decode(xdr, 8);
3296 if (unlikely(!p))
3297 goto out_overflow;
3298 xdr_decode_hyper(p, &maxread);
3299 if (maxread > 0x7FFFFFFF)
3300 maxread = 0x7FFFFFFF;
3301 *res = (uint32_t)maxread;
3302 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3303 }
3304 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3305 return status;
3306 out_overflow:
3307 print_overflow_msg(__func__, xdr);
3308 return -EIO;
3309 }
3310
3311 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3312 {
3313 __be32 *p;
3314 int status = 0;
3315
3316 *res = 1024;
3317 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3318 return -EIO;
3319 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3320 uint64_t maxwrite;
3321 p = xdr_inline_decode(xdr, 8);
3322 if (unlikely(!p))
3323 goto out_overflow;
3324 xdr_decode_hyper(p, &maxwrite);
3325 if (maxwrite > 0x7FFFFFFF)
3326 maxwrite = 0x7FFFFFFF;
3327 *res = (uint32_t)maxwrite;
3328 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3329 }
3330 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3331 return status;
3332 out_overflow:
3333 print_overflow_msg(__func__, xdr);
3334 return -EIO;
3335 }
3336
3337 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3338 {
3339 uint32_t tmp;
3340 __be32 *p;
3341 int ret = 0;
3342
3343 *mode = 0;
3344 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3345 return -EIO;
3346 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3347 p = xdr_inline_decode(xdr, 4);
3348 if (unlikely(!p))
3349 goto out_overflow;
3350 tmp = be32_to_cpup(p);
3351 *mode = tmp & ~S_IFMT;
3352 bitmap[1] &= ~FATTR4_WORD1_MODE;
3353 ret = NFS_ATTR_FATTR_MODE;
3354 }
3355 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3356 return ret;
3357 out_overflow:
3358 print_overflow_msg(__func__, xdr);
3359 return -EIO;
3360 }
3361
3362 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3363 {
3364 __be32 *p;
3365 int ret = 0;
3366
3367 *nlink = 1;
3368 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3369 return -EIO;
3370 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3371 p = xdr_inline_decode(xdr, 4);
3372 if (unlikely(!p))
3373 goto out_overflow;
3374 *nlink = be32_to_cpup(p);
3375 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3376 ret = NFS_ATTR_FATTR_NLINK;
3377 }
3378 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3379 return ret;
3380 out_overflow:
3381 print_overflow_msg(__func__, xdr);
3382 return -EIO;
3383 }
3384
3385 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3386 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3387 {
3388 uint32_t len;
3389 __be32 *p;
3390 int ret = 0;
3391
3392 *uid = -2;
3393 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3394 return -EIO;
3395 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3396 p = xdr_inline_decode(xdr, 4);
3397 if (unlikely(!p))
3398 goto out_overflow;
3399 len = be32_to_cpup(p);
3400 p = xdr_inline_decode(xdr, len);
3401 if (unlikely(!p))
3402 goto out_overflow;
3403 if (!may_sleep) {
3404 /* do nothing */
3405 } else if (len < XDR_MAX_NETOBJ) {
3406 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3407 ret = NFS_ATTR_FATTR_OWNER;
3408 else
3409 dprintk("%s: nfs_map_name_to_uid failed!\n",
3410 __func__);
3411 } else
3412 dprintk("%s: name too long (%u)!\n",
3413 __func__, len);
3414 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3415 }
3416 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3417 return ret;
3418 out_overflow:
3419 print_overflow_msg(__func__, xdr);
3420 return -EIO;
3421 }
3422
3423 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3424 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3425 {
3426 uint32_t len;
3427 __be32 *p;
3428 int ret = 0;
3429
3430 *gid = -2;
3431 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3432 return -EIO;
3433 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3434 p = xdr_inline_decode(xdr, 4);
3435 if (unlikely(!p))
3436 goto out_overflow;
3437 len = be32_to_cpup(p);
3438 p = xdr_inline_decode(xdr, len);
3439 if (unlikely(!p))
3440 goto out_overflow;
3441 if (!may_sleep) {
3442 /* do nothing */
3443 } else if (len < XDR_MAX_NETOBJ) {
3444 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3445 ret = NFS_ATTR_FATTR_GROUP;
3446 else
3447 dprintk("%s: nfs_map_group_to_gid failed!\n",
3448 __func__);
3449 } else
3450 dprintk("%s: name too long (%u)!\n",
3451 __func__, len);
3452 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3453 }
3454 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3455 return ret;
3456 out_overflow:
3457 print_overflow_msg(__func__, xdr);
3458 return -EIO;
3459 }
3460
3461 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3462 {
3463 uint32_t major = 0, minor = 0;
3464 __be32 *p;
3465 int ret = 0;
3466
3467 *rdev = MKDEV(0,0);
3468 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3469 return -EIO;
3470 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3471 dev_t tmp;
3472
3473 p = xdr_inline_decode(xdr, 8);
3474 if (unlikely(!p))
3475 goto out_overflow;
3476 major = be32_to_cpup(p++);
3477 minor = be32_to_cpup(p);
3478 tmp = MKDEV(major, minor);
3479 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3480 *rdev = tmp;
3481 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3482 ret = NFS_ATTR_FATTR_RDEV;
3483 }
3484 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3485 return ret;
3486 out_overflow:
3487 print_overflow_msg(__func__, xdr);
3488 return -EIO;
3489 }
3490
3491 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3492 {
3493 __be32 *p;
3494 int status = 0;
3495
3496 *res = 0;
3497 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3498 return -EIO;
3499 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3500 p = xdr_inline_decode(xdr, 8);
3501 if (unlikely(!p))
3502 goto out_overflow;
3503 xdr_decode_hyper(p, res);
3504 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3505 }
3506 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3507 return status;
3508 out_overflow:
3509 print_overflow_msg(__func__, xdr);
3510 return -EIO;
3511 }
3512
3513 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3514 {
3515 __be32 *p;
3516 int status = 0;
3517
3518 *res = 0;
3519 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3520 return -EIO;
3521 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3522 p = xdr_inline_decode(xdr, 8);
3523 if (unlikely(!p))
3524 goto out_overflow;
3525 xdr_decode_hyper(p, res);
3526 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3527 }
3528 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3529 return status;
3530 out_overflow:
3531 print_overflow_msg(__func__, xdr);
3532 return -EIO;
3533 }
3534
3535 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3536 {
3537 __be32 *p;
3538 int status = 0;
3539
3540 *res = 0;
3541 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3542 return -EIO;
3543 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3544 p = xdr_inline_decode(xdr, 8);
3545 if (unlikely(!p))
3546 goto out_overflow;
3547 xdr_decode_hyper(p, res);
3548 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3549 }
3550 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3551 return status;
3552 out_overflow:
3553 print_overflow_msg(__func__, xdr);
3554 return -EIO;
3555 }
3556
3557 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3558 {
3559 __be32 *p;
3560 int ret = 0;
3561
3562 *used = 0;
3563 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3564 return -EIO;
3565 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3566 p = xdr_inline_decode(xdr, 8);
3567 if (unlikely(!p))
3568 goto out_overflow;
3569 xdr_decode_hyper(p, used);
3570 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3571 ret = NFS_ATTR_FATTR_SPACE_USED;
3572 }
3573 dprintk("%s: space used=%Lu\n", __func__,
3574 (unsigned long long)*used);
3575 return ret;
3576 out_overflow:
3577 print_overflow_msg(__func__, xdr);
3578 return -EIO;
3579 }
3580
3581 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3582 {
3583 __be32 *p;
3584 uint64_t sec;
3585 uint32_t nsec;
3586
3587 p = xdr_inline_decode(xdr, 12);
3588 if (unlikely(!p))
3589 goto out_overflow;
3590 p = xdr_decode_hyper(p, &sec);
3591 nsec = be32_to_cpup(p);
3592 time->tv_sec = (time_t)sec;
3593 time->tv_nsec = (long)nsec;
3594 return 0;
3595 out_overflow:
3596 print_overflow_msg(__func__, xdr);
3597 return -EIO;
3598 }
3599
3600 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3601 {
3602 int status = 0;
3603
3604 time->tv_sec = 0;
3605 time->tv_nsec = 0;
3606 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3607 return -EIO;
3608 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3609 status = decode_attr_time(xdr, time);
3610 if (status == 0)
3611 status = NFS_ATTR_FATTR_ATIME;
3612 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3613 }
3614 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3615 return status;
3616 }
3617
3618 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3619 {
3620 int status = 0;
3621
3622 time->tv_sec = 0;
3623 time->tv_nsec = 0;
3624 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3625 return -EIO;
3626 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3627 status = decode_attr_time(xdr, time);
3628 if (status == 0)
3629 status = NFS_ATTR_FATTR_CTIME;
3630 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3631 }
3632 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3633 return status;
3634 }
3635
3636 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3637 struct timespec *time)
3638 {
3639 int status = 0;
3640
3641 time->tv_sec = 0;
3642 time->tv_nsec = 0;
3643 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3644 return -EIO;
3645 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3646 status = decode_attr_time(xdr, time);
3647 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3648 }
3649 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3650 (long)time->tv_nsec);
3651 return status;
3652 }
3653
3654 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3655 {
3656 int status = 0;
3657
3658 time->tv_sec = 0;
3659 time->tv_nsec = 0;
3660 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3661 return -EIO;
3662 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3663 status = decode_attr_time(xdr, time);
3664 if (status == 0)
3665 status = NFS_ATTR_FATTR_MTIME;
3666 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3667 }
3668 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3669 return status;
3670 }
3671
3672 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3673 {
3674 unsigned int attrwords = XDR_QUADLEN(attrlen);
3675 unsigned int nwords = xdr->p - savep;
3676
3677 if (unlikely(attrwords != nwords)) {
3678 dprintk("%s: server returned incorrect attribute length: "
3679 "%u %c %u\n",
3680 __func__,
3681 attrwords << 2,
3682 (attrwords < nwords) ? '<' : '>',
3683 nwords << 2);
3684 return -EIO;
3685 }
3686 return 0;
3687 }
3688
3689 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3690 {
3691 __be32 *p;
3692
3693 p = xdr_inline_decode(xdr, 20);
3694 if (unlikely(!p))
3695 goto out_overflow;
3696 cinfo->atomic = be32_to_cpup(p++);
3697 p = xdr_decode_hyper(p, &cinfo->before);
3698 xdr_decode_hyper(p, &cinfo->after);
3699 return 0;
3700 out_overflow:
3701 print_overflow_msg(__func__, xdr);
3702 return -EIO;
3703 }
3704
3705 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3706 {
3707 __be32 *p;
3708 uint32_t supp, acc;
3709 int status;
3710
3711 status = decode_op_hdr(xdr, OP_ACCESS);
3712 if (status)
3713 return status;
3714 p = xdr_inline_decode(xdr, 8);
3715 if (unlikely(!p))
3716 goto out_overflow;
3717 supp = be32_to_cpup(p++);
3718 acc = be32_to_cpup(p);
3719 access->supported = supp;
3720 access->access = acc;
3721 return 0;
3722 out_overflow:
3723 print_overflow_msg(__func__, xdr);
3724 return -EIO;
3725 }
3726
3727 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3728 {
3729 __be32 *p;
3730
3731 p = xdr_inline_decode(xdr, len);
3732 if (likely(p)) {
3733 memcpy(buf, p, len);
3734 return 0;
3735 }
3736 print_overflow_msg(__func__, xdr);
3737 return -EIO;
3738 }
3739
3740 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3741 {
3742 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3743 }
3744
3745 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3746 {
3747 int status;
3748
3749 status = decode_op_hdr(xdr, OP_CLOSE);
3750 if (status != -EIO)
3751 nfs_increment_open_seqid(status, res->seqid);
3752 if (!status)
3753 status = decode_stateid(xdr, &res->stateid);
3754 return status;
3755 }
3756
3757 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3758 {
3759 return decode_opaque_fixed(xdr, verifier, 8);
3760 }
3761
3762 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3763 {
3764 int status;
3765
3766 status = decode_op_hdr(xdr, OP_COMMIT);
3767 if (!status)
3768 status = decode_verifier(xdr, res->verf->verifier);
3769 return status;
3770 }
3771
3772 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3773 {
3774 __be32 *p;
3775 uint32_t bmlen;
3776 int status;
3777
3778 status = decode_op_hdr(xdr, OP_CREATE);
3779 if (status)
3780 return status;
3781 if ((status = decode_change_info(xdr, cinfo)))
3782 return status;
3783 p = xdr_inline_decode(xdr, 4);
3784 if (unlikely(!p))
3785 goto out_overflow;
3786 bmlen = be32_to_cpup(p);
3787 p = xdr_inline_decode(xdr, bmlen << 2);
3788 if (likely(p))
3789 return 0;
3790 out_overflow:
3791 print_overflow_msg(__func__, xdr);
3792 return -EIO;
3793 }
3794
3795 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3796 {
3797 __be32 *savep;
3798 uint32_t attrlen, bitmap[2] = {0};
3799 int status;
3800
3801 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3802 goto xdr_error;
3803 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3804 goto xdr_error;
3805 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3806 goto xdr_error;
3807 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3808 goto xdr_error;
3809 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3810 goto xdr_error;
3811 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3812 goto xdr_error;
3813 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3814 goto xdr_error;
3815 status = verify_attr_len(xdr, savep, attrlen);
3816 xdr_error:
3817 dprintk("%s: xdr returned %d!\n", __func__, -status);
3818 return status;
3819 }
3820
3821 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3822 {
3823 __be32 *savep;
3824 uint32_t attrlen, bitmap[2] = {0};
3825 int status;
3826
3827 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3828 goto xdr_error;
3829 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3830 goto xdr_error;
3831 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3832 goto xdr_error;
3833
3834 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3835 goto xdr_error;
3836 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3837 goto xdr_error;
3838 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3839 goto xdr_error;
3840 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3841 goto xdr_error;
3842 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3843 goto xdr_error;
3844 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3845 goto xdr_error;
3846
3847 status = verify_attr_len(xdr, savep, attrlen);
3848 xdr_error:
3849 dprintk("%s: xdr returned %d!\n", __func__, -status);
3850 return status;
3851 }
3852
3853 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3854 {
3855 __be32 *savep;
3856 uint32_t attrlen, bitmap[2] = {0};
3857 int status;
3858
3859 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3860 goto xdr_error;
3861 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3862 goto xdr_error;
3863 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3864 goto xdr_error;
3865
3866 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3867 goto xdr_error;
3868 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3869 goto xdr_error;
3870
3871 status = verify_attr_len(xdr, savep, attrlen);
3872 xdr_error:
3873 dprintk("%s: xdr returned %d!\n", __func__, -status);
3874 return status;
3875 }
3876
3877 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3878 struct nfs_fattr *fattr, struct nfs_fh *fh,
3879 const struct nfs_server *server, int may_sleep)
3880 {
3881 int status;
3882 umode_t fmode = 0;
3883 uint64_t fileid;
3884 uint32_t type;
3885
3886 status = decode_attr_type(xdr, bitmap, &type);
3887 if (status < 0)
3888 goto xdr_error;
3889 fattr->mode = 0;
3890 if (status != 0) {
3891 fattr->mode |= nfs_type2fmt[type];
3892 fattr->valid |= status;
3893 }
3894
3895 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3896 if (status < 0)
3897 goto xdr_error;
3898 fattr->valid |= status;
3899
3900 status = decode_attr_size(xdr, bitmap, &fattr->size);
3901 if (status < 0)
3902 goto xdr_error;
3903 fattr->valid |= status;
3904
3905 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3906 if (status < 0)
3907 goto xdr_error;
3908 fattr->valid |= status;
3909
3910 status = decode_attr_error(xdr, bitmap);
3911 if (status < 0)
3912 goto xdr_error;
3913
3914 status = decode_attr_filehandle(xdr, bitmap, fh);
3915 if (status < 0)
3916 goto xdr_error;
3917
3918 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3919 if (status < 0)
3920 goto xdr_error;
3921 fattr->valid |= status;
3922
3923 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3924 struct nfs4_fs_locations,
3925 fattr));
3926 if (status < 0)
3927 goto xdr_error;
3928 fattr->valid |= status;
3929
3930 status = decode_attr_mode(xdr, bitmap, &fmode);
3931 if (status < 0)
3932 goto xdr_error;
3933 if (status != 0) {
3934 fattr->mode |= fmode;
3935 fattr->valid |= status;
3936 }
3937
3938 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3939 if (status < 0)
3940 goto xdr_error;
3941 fattr->valid |= status;
3942
3943 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3944 &fattr->uid, may_sleep);
3945 if (status < 0)
3946 goto xdr_error;
3947 fattr->valid |= status;
3948
3949 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3950 &fattr->gid, may_sleep);
3951 if (status < 0)
3952 goto xdr_error;
3953 fattr->valid |= status;
3954
3955 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3956 if (status < 0)
3957 goto xdr_error;
3958 fattr->valid |= status;
3959
3960 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3961 if (status < 0)
3962 goto xdr_error;
3963 fattr->valid |= status;
3964
3965 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3966 if (status < 0)
3967 goto xdr_error;
3968 fattr->valid |= status;
3969
3970 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3971 if (status < 0)
3972 goto xdr_error;
3973 fattr->valid |= status;
3974
3975 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3976 if (status < 0)
3977 goto xdr_error;
3978 fattr->valid |= status;
3979
3980 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3981 if (status < 0)
3982 goto xdr_error;
3983 if (status != 0 && !(fattr->valid & status)) {
3984 fattr->fileid = fileid;
3985 fattr->valid |= status;
3986 }
3987
3988 xdr_error:
3989 dprintk("%s: xdr returned %d\n", __func__, -status);
3990 return status;
3991 }
3992
3993 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3994 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3995 {
3996 __be32 *savep;
3997 uint32_t attrlen,
3998 bitmap[2] = {0};
3999 int status;
4000
4001 status = decode_op_hdr(xdr, OP_GETATTR);
4002 if (status < 0)
4003 goto xdr_error;
4004
4005 status = decode_attr_bitmap(xdr, bitmap);
4006 if (status < 0)
4007 goto xdr_error;
4008
4009 status = decode_attr_length(xdr, &attrlen, &savep);
4010 if (status < 0)
4011 goto xdr_error;
4012
4013 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4014 if (status < 0)
4015 goto xdr_error;
4016
4017 status = verify_attr_len(xdr, savep, attrlen);
4018 xdr_error:
4019 dprintk("%s: xdr returned %d\n", __func__, -status);
4020 return status;
4021 }
4022
4023 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4024 const struct nfs_server *server, int may_sleep)
4025 {
4026 return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4027 }
4028
4029 /*
4030 * Decode potentially multiple layout types. Currently we only support
4031 * one layout driver per file system.
4032 */
4033 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4034 uint32_t *layouttype)
4035 {
4036 uint32_t *p;
4037 int num;
4038
4039 p = xdr_inline_decode(xdr, 4);
4040 if (unlikely(!p))
4041 goto out_overflow;
4042 num = be32_to_cpup(p);
4043
4044 /* pNFS is not supported by the underlying file system */
4045 if (num == 0) {
4046 *layouttype = 0;
4047 return 0;
4048 }
4049 if (num > 1)
4050 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4051 "per filesystem not supported\n", __func__);
4052
4053 /* Decode and set first layout type, move xdr->p past unused types */
4054 p = xdr_inline_decode(xdr, num * 4);
4055 if (unlikely(!p))
4056 goto out_overflow;
4057 *layouttype = be32_to_cpup(p);
4058 return 0;
4059 out_overflow:
4060 print_overflow_msg(__func__, xdr);
4061 return -EIO;
4062 }
4063
4064 /*
4065 * The type of file system exported.
4066 * Note we must ensure that layouttype is set in any non-error case.
4067 */
4068 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4069 uint32_t *layouttype)
4070 {
4071 int status = 0;
4072
4073 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4074 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4075 return -EIO;
4076 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4077 status = decode_first_pnfs_layout_type(xdr, layouttype);
4078 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4079 } else
4080 *layouttype = 0;
4081 return status;
4082 }
4083
4084 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4085 {
4086 __be32 *savep;
4087 uint32_t attrlen, bitmap[2];
4088 int status;
4089
4090 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4091 goto xdr_error;
4092 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4093 goto xdr_error;
4094 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4095 goto xdr_error;
4096
4097 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4098
4099 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4100 goto xdr_error;
4101 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4102 goto xdr_error;
4103 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4104 goto xdr_error;
4105 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4106 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4107 goto xdr_error;
4108 fsinfo->wtpref = fsinfo->wtmax;
4109 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4110 if (status != 0)
4111 goto xdr_error;
4112 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4113 if (status != 0)
4114 goto xdr_error;
4115
4116 status = verify_attr_len(xdr, savep, attrlen);
4117 xdr_error:
4118 dprintk("%s: xdr returned %d!\n", __func__, -status);
4119 return status;
4120 }
4121
4122 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4123 {
4124 __be32 *p;
4125 uint32_t len;
4126 int status;
4127
4128 /* Zero handle first to allow comparisons */
4129 memset(fh, 0, sizeof(*fh));
4130
4131 status = decode_op_hdr(xdr, OP_GETFH);
4132 if (status)
4133 return status;
4134
4135 p = xdr_inline_decode(xdr, 4);
4136 if (unlikely(!p))
4137 goto out_overflow;
4138 len = be32_to_cpup(p);
4139 if (len > NFS4_FHSIZE)
4140 return -EIO;
4141 fh->size = len;
4142 p = xdr_inline_decode(xdr, len);
4143 if (unlikely(!p))
4144 goto out_overflow;
4145 memcpy(fh->data, p, len);
4146 return 0;
4147 out_overflow:
4148 print_overflow_msg(__func__, xdr);
4149 return -EIO;
4150 }
4151
4152 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4153 {
4154 int status;
4155
4156 status = decode_op_hdr(xdr, OP_LINK);
4157 if (status)
4158 return status;
4159 return decode_change_info(xdr, cinfo);
4160 }
4161
4162 /*
4163 * We create the owner, so we know a proper owner.id length is 4.
4164 */
4165 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4166 {
4167 uint64_t offset, length, clientid;
4168 __be32 *p;
4169 uint32_t namelen, type;
4170
4171 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4172 if (unlikely(!p))
4173 goto out_overflow;
4174 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4175 p = xdr_decode_hyper(p, &length);
4176 type = be32_to_cpup(p++); /* 4 byte read */
4177 if (fl != NULL) { /* manipulate file lock */
4178 fl->fl_start = (loff_t)offset;
4179 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4180 if (length == ~(uint64_t)0)
4181 fl->fl_end = OFFSET_MAX;
4182 fl->fl_type = F_WRLCK;
4183 if (type & 1)
4184 fl->fl_type = F_RDLCK;
4185 fl->fl_pid = 0;
4186 }
4187 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4188 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4189 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4190 if (likely(p))
4191 return -NFS4ERR_DENIED;
4192 out_overflow:
4193 print_overflow_msg(__func__, xdr);
4194 return -EIO;
4195 }
4196
4197 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4198 {
4199 int status;
4200
4201 status = decode_op_hdr(xdr, OP_LOCK);
4202 if (status == -EIO)
4203 goto out;
4204 if (status == 0) {
4205 status = decode_stateid(xdr, &res->stateid);
4206 if (unlikely(status))
4207 goto out;
4208 } else if (status == -NFS4ERR_DENIED)
4209 status = decode_lock_denied(xdr, NULL);
4210 if (res->open_seqid != NULL)
4211 nfs_increment_open_seqid(status, res->open_seqid);
4212 nfs_increment_lock_seqid(status, res->lock_seqid);
4213 out:
4214 return status;
4215 }
4216
4217 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4218 {
4219 int status;
4220 status = decode_op_hdr(xdr, OP_LOCKT);
4221 if (status == -NFS4ERR_DENIED)
4222 return decode_lock_denied(xdr, res->denied);
4223 return status;
4224 }
4225
4226 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4227 {
4228 int status;
4229
4230 status = decode_op_hdr(xdr, OP_LOCKU);
4231 if (status != -EIO)
4232 nfs_increment_lock_seqid(status, res->seqid);
4233 if (status == 0)
4234 status = decode_stateid(xdr, &res->stateid);
4235 return status;
4236 }
4237
4238 static int decode_release_lockowner(struct xdr_stream *xdr)
4239 {
4240 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4241 }
4242
4243 static int decode_lookup(struct xdr_stream *xdr)
4244 {
4245 return decode_op_hdr(xdr, OP_LOOKUP);
4246 }
4247
4248 /* This is too sick! */
4249 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4250 {
4251 __be32 *p;
4252 uint32_t limit_type, nblocks, blocksize;
4253
4254 p = xdr_inline_decode(xdr, 12);
4255 if (unlikely(!p))
4256 goto out_overflow;
4257 limit_type = be32_to_cpup(p++);
4258 switch (limit_type) {
4259 case 1:
4260 xdr_decode_hyper(p, maxsize);
4261 break;
4262 case 2:
4263 nblocks = be32_to_cpup(p++);
4264 blocksize = be32_to_cpup(p);
4265 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4266 }
4267 return 0;
4268 out_overflow:
4269 print_overflow_msg(__func__, xdr);
4270 return -EIO;
4271 }
4272
4273 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4274 {
4275 __be32 *p;
4276 uint32_t delegation_type;
4277 int status;
4278
4279 p = xdr_inline_decode(xdr, 4);
4280 if (unlikely(!p))
4281 goto out_overflow;
4282 delegation_type = be32_to_cpup(p);
4283 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4284 res->delegation_type = 0;
4285 return 0;
4286 }
4287 status = decode_stateid(xdr, &res->delegation);
4288 if (unlikely(status))
4289 return status;
4290 p = xdr_inline_decode(xdr, 4);
4291 if (unlikely(!p))
4292 goto out_overflow;
4293 res->do_recall = be32_to_cpup(p);
4294
4295 switch (delegation_type) {
4296 case NFS4_OPEN_DELEGATE_READ:
4297 res->delegation_type = FMODE_READ;
4298 break;
4299 case NFS4_OPEN_DELEGATE_WRITE:
4300 res->delegation_type = FMODE_WRITE|FMODE_READ;
4301 if (decode_space_limit(xdr, &res->maxsize) < 0)
4302 return -EIO;
4303 }
4304 return decode_ace(xdr, NULL, res->server->nfs_client);
4305 out_overflow:
4306 print_overflow_msg(__func__, xdr);
4307 return -EIO;
4308 }
4309
4310 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4311 {
4312 __be32 *p;
4313 uint32_t savewords, bmlen, i;
4314 int status;
4315
4316 status = decode_op_hdr(xdr, OP_OPEN);
4317 if (status != -EIO)
4318 nfs_increment_open_seqid(status, res->seqid);
4319 if (!status)
4320 status = decode_stateid(xdr, &res->stateid);
4321 if (unlikely(status))
4322 return status;
4323
4324 decode_change_info(xdr, &res->cinfo);
4325
4326 p = xdr_inline_decode(xdr, 8);
4327 if (unlikely(!p))
4328 goto out_overflow;
4329 res->rflags = be32_to_cpup(p++);
4330 bmlen = be32_to_cpup(p);
4331 if (bmlen > 10)
4332 goto xdr_error;
4333
4334 p = xdr_inline_decode(xdr, bmlen << 2);
4335 if (unlikely(!p))
4336 goto out_overflow;
4337 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4338 for (i = 0; i < savewords; ++i)
4339 res->attrset[i] = be32_to_cpup(p++);
4340 for (; i < NFS4_BITMAP_SIZE; i++)
4341 res->attrset[i] = 0;
4342
4343 return decode_delegation(xdr, res);
4344 xdr_error:
4345 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4346 return -EIO;
4347 out_overflow:
4348 print_overflow_msg(__func__, xdr);
4349 return -EIO;
4350 }
4351
4352 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4353 {
4354 int status;
4355
4356 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4357 if (status != -EIO)
4358 nfs_increment_open_seqid(status, res->seqid);
4359 if (!status)
4360 status = decode_stateid(xdr, &res->stateid);
4361 return status;
4362 }
4363
4364 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4365 {
4366 int status;
4367
4368 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4369 if (status != -EIO)
4370 nfs_increment_open_seqid(status, res->seqid);
4371 if (!status)
4372 status = decode_stateid(xdr, &res->stateid);
4373 return status;
4374 }
4375
4376 static int decode_putfh(struct xdr_stream *xdr)
4377 {
4378 return decode_op_hdr(xdr, OP_PUTFH);
4379 }
4380
4381 static int decode_putrootfh(struct xdr_stream *xdr)
4382 {
4383 return decode_op_hdr(xdr, OP_PUTROOTFH);
4384 }
4385
4386 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4387 {
4388 struct kvec *iov = req->rq_rcv_buf.head;
4389 __be32 *p;
4390 uint32_t count, eof, recvd, hdrlen;
4391 int status;
4392
4393 status = decode_op_hdr(xdr, OP_READ);
4394 if (status)
4395 return status;
4396 p = xdr_inline_decode(xdr, 8);
4397 if (unlikely(!p))
4398 goto out_overflow;
4399 eof = be32_to_cpup(p++);
4400 count = be32_to_cpup(p);
4401 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4402 recvd = req->rq_rcv_buf.len - hdrlen;
4403 if (count > recvd) {
4404 dprintk("NFS: server cheating in read reply: "
4405 "count %u > recvd %u\n", count, recvd);
4406 count = recvd;
4407 eof = 0;
4408 }
4409 xdr_read_pages(xdr, count);
4410 res->eof = eof;
4411 res->count = count;
4412 return 0;
4413 out_overflow:
4414 print_overflow_msg(__func__, xdr);
4415 return -EIO;
4416 }
4417
4418 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4419 {
4420 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4421 struct kvec *iov = rcvbuf->head;
4422 size_t hdrlen;
4423 u32 recvd, pglen = rcvbuf->page_len;
4424 int status;
4425
4426 status = decode_op_hdr(xdr, OP_READDIR);
4427 if (!status)
4428 status = decode_verifier(xdr, readdir->verifier.data);
4429 if (unlikely(status))
4430 return status;
4431 dprintk("%s: verifier = %08x:%08x\n",
4432 __func__,
4433 ((u32 *)readdir->verifier.data)[0],
4434 ((u32 *)readdir->verifier.data)[1]);
4435
4436
4437 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4438 recvd = rcvbuf->len - hdrlen;
4439 if (pglen > recvd)
4440 pglen = recvd;
4441 xdr_read_pages(xdr, pglen);
4442
4443
4444 return pglen;
4445 }
4446
4447 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4448 {
4449 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4450 struct kvec *iov = rcvbuf->head;
4451 size_t hdrlen;
4452 u32 len, recvd;
4453 __be32 *p;
4454 int status;
4455
4456 status = decode_op_hdr(xdr, OP_READLINK);
4457 if (status)
4458 return status;
4459
4460 /* Convert length of symlink */
4461 p = xdr_inline_decode(xdr, 4);
4462 if (unlikely(!p))
4463 goto out_overflow;
4464 len = be32_to_cpup(p);
4465 if (len >= rcvbuf->page_len || len <= 0) {
4466 dprintk("nfs: server returned giant symlink!\n");
4467 return -ENAMETOOLONG;
4468 }
4469 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4470 recvd = req->rq_rcv_buf.len - hdrlen;
4471 if (recvd < len) {
4472 dprintk("NFS: server cheating in readlink reply: "
4473 "count %u > recvd %u\n", len, recvd);
4474 return -EIO;
4475 }
4476 xdr_read_pages(xdr, len);
4477 /*
4478 * The XDR encode routine has set things up so that
4479 * the link text will be copied directly into the
4480 * buffer. We just have to do overflow-checking,
4481 * and and null-terminate the text (the VFS expects
4482 * null-termination).
4483 */
4484 xdr_terminate_string(rcvbuf, len);
4485 return 0;
4486 out_overflow:
4487 print_overflow_msg(__func__, xdr);
4488 return -EIO;
4489 }
4490
4491 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4492 {
4493 int status;
4494
4495 status = decode_op_hdr(xdr, OP_REMOVE);
4496 if (status)
4497 goto out;
4498 status = decode_change_info(xdr, cinfo);
4499 out:
4500 return status;
4501 }
4502
4503 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4504 struct nfs4_change_info *new_cinfo)
4505 {
4506 int status;
4507
4508 status = decode_op_hdr(xdr, OP_RENAME);
4509 if (status)
4510 goto out;
4511 if ((status = decode_change_info(xdr, old_cinfo)))
4512 goto out;
4513 status = decode_change_info(xdr, new_cinfo);
4514 out:
4515 return status;
4516 }
4517
4518 static int decode_renew(struct xdr_stream *xdr)
4519 {
4520 return decode_op_hdr(xdr, OP_RENEW);
4521 }
4522
4523 static int
4524 decode_restorefh(struct xdr_stream *xdr)
4525 {
4526 return decode_op_hdr(xdr, OP_RESTOREFH);
4527 }
4528
4529 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4530 size_t *acl_len)
4531 {
4532 __be32 *savep;
4533 uint32_t attrlen,
4534 bitmap[2] = {0};
4535 struct kvec *iov = req->rq_rcv_buf.head;
4536 int status;
4537
4538 *acl_len = 0;
4539 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4540 goto out;
4541 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4542 goto out;
4543 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4544 goto out;
4545
4546 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4547 return -EIO;
4548 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4549 size_t hdrlen;
4550 u32 recvd;
4551
4552 /* We ignore &savep and don't do consistency checks on
4553 * the attr length. Let userspace figure it out.... */
4554 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4555 recvd = req->rq_rcv_buf.len - hdrlen;
4556 if (attrlen > recvd) {
4557 dprintk("NFS: server cheating in getattr"
4558 " acl reply: attrlen %u > recvd %u\n",
4559 attrlen, recvd);
4560 return -EINVAL;
4561 }
4562 xdr_read_pages(xdr, attrlen);
4563 *acl_len = attrlen;
4564 } else
4565 status = -EOPNOTSUPP;
4566
4567 out:
4568 return status;
4569 }
4570
4571 static int
4572 decode_savefh(struct xdr_stream *xdr)
4573 {
4574 return decode_op_hdr(xdr, OP_SAVEFH);
4575 }
4576
4577 static int decode_setattr(struct xdr_stream *xdr)
4578 {
4579 __be32 *p;
4580 uint32_t bmlen;
4581 int status;
4582
4583 status = decode_op_hdr(xdr, OP_SETATTR);
4584 if (status)
4585 return status;
4586 p = xdr_inline_decode(xdr, 4);
4587 if (unlikely(!p))
4588 goto out_overflow;
4589 bmlen = be32_to_cpup(p);
4590 p = xdr_inline_decode(xdr, bmlen << 2);
4591 if (likely(p))
4592 return 0;
4593 out_overflow:
4594 print_overflow_msg(__func__, xdr);
4595 return -EIO;
4596 }
4597
4598 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4599 {
4600 __be32 *p;
4601 uint32_t opnum;
4602 int32_t nfserr;
4603
4604 p = xdr_inline_decode(xdr, 8);
4605 if (unlikely(!p))
4606 goto out_overflow;
4607 opnum = be32_to_cpup(p++);
4608 if (opnum != OP_SETCLIENTID) {
4609 dprintk("nfs: decode_setclientid: Server returned operation"
4610 " %d\n", opnum);
4611 return -EIO;
4612 }
4613 nfserr = be32_to_cpup(p);
4614 if (nfserr == NFS_OK) {
4615 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4616 if (unlikely(!p))
4617 goto out_overflow;
4618 p = xdr_decode_hyper(p, &res->clientid);
4619 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4620 } else if (nfserr == NFSERR_CLID_INUSE) {
4621 uint32_t len;
4622
4623 /* skip netid string */
4624 p = xdr_inline_decode(xdr, 4);
4625 if (unlikely(!p))
4626 goto out_overflow;
4627 len = be32_to_cpup(p);
4628 p = xdr_inline_decode(xdr, len);
4629 if (unlikely(!p))
4630 goto out_overflow;
4631
4632 /* skip uaddr string */
4633 p = xdr_inline_decode(xdr, 4);
4634 if (unlikely(!p))
4635 goto out_overflow;
4636 len = be32_to_cpup(p);
4637 p = xdr_inline_decode(xdr, len);
4638 if (unlikely(!p))
4639 goto out_overflow;
4640 return -NFSERR_CLID_INUSE;
4641 } else
4642 return nfs4_stat_to_errno(nfserr);
4643
4644 return 0;
4645 out_overflow:
4646 print_overflow_msg(__func__, xdr);
4647 return -EIO;
4648 }
4649
4650 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4651 {
4652 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4653 }
4654
4655 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4656 {
4657 __be32 *p;
4658 int status;
4659
4660 status = decode_op_hdr(xdr, OP_WRITE);
4661 if (status)
4662 return status;
4663
4664 p = xdr_inline_decode(xdr, 16);
4665 if (unlikely(!p))
4666 goto out_overflow;
4667 res->count = be32_to_cpup(p++);
4668 res->verf->committed = be32_to_cpup(p++);
4669 memcpy(res->verf->verifier, p, 8);
4670 return 0;
4671 out_overflow:
4672 print_overflow_msg(__func__, xdr);
4673 return -EIO;
4674 }
4675
4676 static int decode_delegreturn(struct xdr_stream *xdr)
4677 {
4678 return decode_op_hdr(xdr, OP_DELEGRETURN);
4679 }
4680
4681 #if defined(CONFIG_NFS_V4_1)
4682 static int decode_exchange_id(struct xdr_stream *xdr,
4683 struct nfs41_exchange_id_res *res)
4684 {
4685 __be32 *p;
4686 uint32_t dummy;
4687 char *dummy_str;
4688 int status;
4689 struct nfs_client *clp = res->client;
4690
4691 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4692 if (status)
4693 return status;
4694
4695 p = xdr_inline_decode(xdr, 8);
4696 if (unlikely(!p))
4697 goto out_overflow;
4698 xdr_decode_hyper(p, &clp->cl_ex_clid);
4699 p = xdr_inline_decode(xdr, 12);
4700 if (unlikely(!p))
4701 goto out_overflow;
4702 clp->cl_seqid = be32_to_cpup(p++);
4703 clp->cl_exchange_flags = be32_to_cpup(p++);
4704
4705 /* We ask for SP4_NONE */
4706 dummy = be32_to_cpup(p);
4707 if (dummy != SP4_NONE)
4708 return -EIO;
4709
4710 /* Throw away minor_id */
4711 p = xdr_inline_decode(xdr, 8);
4712 if (unlikely(!p))
4713 goto out_overflow;
4714
4715 /* Throw away Major id */
4716 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4717 if (unlikely(status))
4718 return status;
4719
4720 /* Throw away server_scope */
4721 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4722 if (unlikely(status))
4723 return status;
4724
4725 /* Throw away Implementation id array */
4726 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4727 if (unlikely(status))
4728 return status;
4729
4730 return 0;
4731 out_overflow:
4732 print_overflow_msg(__func__, xdr);
4733 return -EIO;
4734 }
4735
4736 static int decode_chan_attrs(struct xdr_stream *xdr,
4737 struct nfs4_channel_attrs *attrs)
4738 {
4739 __be32 *p;
4740 u32 nr_attrs;
4741
4742 p = xdr_inline_decode(xdr, 28);
4743 if (unlikely(!p))
4744 goto out_overflow;
4745 attrs->headerpadsz = be32_to_cpup(p++);
4746 attrs->max_rqst_sz = be32_to_cpup(p++);
4747 attrs->max_resp_sz = be32_to_cpup(p++);
4748 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4749 attrs->max_ops = be32_to_cpup(p++);
4750 attrs->max_reqs = be32_to_cpup(p++);
4751 nr_attrs = be32_to_cpup(p);
4752 if (unlikely(nr_attrs > 1)) {
4753 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4754 __func__, nr_attrs);
4755 return -EINVAL;
4756 }
4757 if (nr_attrs == 1) {
4758 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4759 if (unlikely(!p))
4760 goto out_overflow;
4761 }
4762 return 0;
4763 out_overflow:
4764 print_overflow_msg(__func__, xdr);
4765 return -EIO;
4766 }
4767
4768 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4769 {
4770 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4771 }
4772
4773 static int decode_create_session(struct xdr_stream *xdr,
4774 struct nfs41_create_session_res *res)
4775 {
4776 __be32 *p;
4777 int status;
4778 struct nfs_client *clp = res->client;
4779 struct nfs4_session *session = clp->cl_session;
4780
4781 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4782 if (!status)
4783 status = decode_sessionid(xdr, &session->sess_id);
4784 if (unlikely(status))
4785 return status;
4786
4787 /* seqid, flags */
4788 p = xdr_inline_decode(xdr, 8);
4789 if (unlikely(!p))
4790 goto out_overflow;
4791 clp->cl_seqid = be32_to_cpup(p++);
4792 session->flags = be32_to_cpup(p);
4793
4794 /* Channel attributes */
4795 status = decode_chan_attrs(xdr, &session->fc_attrs);
4796 if (!status)
4797 status = decode_chan_attrs(xdr, &session->bc_attrs);
4798 return status;
4799 out_overflow:
4800 print_overflow_msg(__func__, xdr);
4801 return -EIO;
4802 }
4803
4804 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4805 {
4806 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4807 }
4808
4809 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4810 {
4811 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4812 }
4813 #endif /* CONFIG_NFS_V4_1 */
4814
4815 static int decode_sequence(struct xdr_stream *xdr,
4816 struct nfs4_sequence_res *res,
4817 struct rpc_rqst *rqstp)
4818 {
4819 #if defined(CONFIG_NFS_V4_1)
4820 struct nfs4_sessionid id;
4821 u32 dummy;
4822 int status;
4823 __be32 *p;
4824
4825 if (!res->sr_session)
4826 return 0;
4827
4828 status = decode_op_hdr(xdr, OP_SEQUENCE);
4829 if (!status)
4830 status = decode_sessionid(xdr, &id);
4831 if (unlikely(status))
4832 goto out_err;
4833
4834 /*
4835 * If the server returns different values for sessionID, slotID or
4836 * sequence number, the server is looney tunes.
4837 */
4838 status = -EREMOTEIO;
4839
4840 if (memcmp(id.data, res->sr_session->sess_id.data,
4841 NFS4_MAX_SESSIONID_LEN)) {
4842 dprintk("%s Invalid session id\n", __func__);
4843 goto out_err;
4844 }
4845
4846 p = xdr_inline_decode(xdr, 20);
4847 if (unlikely(!p))
4848 goto out_overflow;
4849
4850 /* seqid */
4851 dummy = be32_to_cpup(p++);
4852 if (dummy != res->sr_slot->seq_nr) {
4853 dprintk("%s Invalid sequence number\n", __func__);
4854 goto out_err;
4855 }
4856 /* slot id */
4857 dummy = be32_to_cpup(p++);
4858 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4859 dprintk("%s Invalid slot id\n", __func__);
4860 goto out_err;
4861 }
4862 /* highest slot id - currently not processed */
4863 dummy = be32_to_cpup(p++);
4864 /* target highest slot id - currently not processed */
4865 dummy = be32_to_cpup(p++);
4866 /* result flags */
4867 res->sr_status_flags = be32_to_cpup(p);
4868 status = 0;
4869 out_err:
4870 res->sr_status = status;
4871 return status;
4872 out_overflow:
4873 print_overflow_msg(__func__, xdr);
4874 status = -EIO;
4875 goto out_err;
4876 #else /* CONFIG_NFS_V4_1 */
4877 return 0;
4878 #endif /* CONFIG_NFS_V4_1 */
4879 }
4880
4881 #if defined(CONFIG_NFS_V4_1)
4882
4883 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4884 struct pnfs_device *pdev)
4885 {
4886 __be32 *p;
4887 uint32_t len, type;
4888 int status;
4889
4890 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4891 if (status) {
4892 if (status == -ETOOSMALL) {
4893 p = xdr_inline_decode(xdr, 4);
4894 if (unlikely(!p))
4895 goto out_overflow;
4896 pdev->mincount = be32_to_cpup(p);
4897 dprintk("%s: Min count too small. mincnt = %u\n",
4898 __func__, pdev->mincount);
4899 }
4900 return status;
4901 }
4902
4903 p = xdr_inline_decode(xdr, 8);
4904 if (unlikely(!p))
4905 goto out_overflow;
4906 type = be32_to_cpup(p++);
4907 if (type != pdev->layout_type) {
4908 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4909 __func__, pdev->layout_type, type);
4910 return -EINVAL;
4911 }
4912 /*
4913 * Get the length of the opaque device_addr4. xdr_read_pages places
4914 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4915 * and places the remaining xdr data in xdr_buf->tail
4916 */
4917 pdev->mincount = be32_to_cpup(p);
4918 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4919
4920 /* Parse notification bitmap, verifying that it is zero. */
4921 p = xdr_inline_decode(xdr, 4);
4922 if (unlikely(!p))
4923 goto out_overflow;
4924 len = be32_to_cpup(p);
4925 if (len) {
4926 uint32_t i;
4927
4928 p = xdr_inline_decode(xdr, 4 * len);
4929 if (unlikely(!p))
4930 goto out_overflow;
4931 for (i = 0; i < len; i++, p++) {
4932 if (be32_to_cpup(p)) {
4933 dprintk("%s: notifications not supported\n",
4934 __func__);
4935 return -EIO;
4936 }
4937 }
4938 }
4939 return 0;
4940 out_overflow:
4941 print_overflow_msg(__func__, xdr);
4942 return -EIO;
4943 }
4944
4945 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
4946 struct nfs4_layoutget_res *res)
4947 {
4948 __be32 *p;
4949 int status;
4950 u32 layout_count;
4951
4952 status = decode_op_hdr(xdr, OP_LAYOUTGET);
4953 if (status)
4954 return status;
4955 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
4956 if (unlikely(!p))
4957 goto out_overflow;
4958 res->return_on_close = be32_to_cpup(p++);
4959 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
4960 layout_count = be32_to_cpup(p);
4961 if (!layout_count) {
4962 dprintk("%s: server responded with empty layout array\n",
4963 __func__);
4964 return -EINVAL;
4965 }
4966
4967 p = xdr_inline_decode(xdr, 24);
4968 if (unlikely(!p))
4969 goto out_overflow;
4970 p = xdr_decode_hyper(p, &res->range.offset);
4971 p = xdr_decode_hyper(p, &res->range.length);
4972 res->range.iomode = be32_to_cpup(p++);
4973 res->type = be32_to_cpup(p++);
4974
4975 status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
4976 if (unlikely(status))
4977 return status;
4978
4979 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
4980 __func__,
4981 (unsigned long)res->range.offset,
4982 (unsigned long)res->range.length,
4983 res->range.iomode,
4984 res->type,
4985 res->layout.len);
4986
4987 /* nfs4_proc_layoutget allocated a single page */
4988 if (res->layout.len > PAGE_SIZE)
4989 return -ENOMEM;
4990 memcpy(res->layout.buf, p, res->layout.len);
4991
4992 if (layout_count > 1) {
4993 /* We only handle a length one array at the moment. Any
4994 * further entries are just ignored. Note that this means
4995 * the client may see a response that is less than the
4996 * minimum it requested.
4997 */
4998 dprintk("%s: server responded with %d layouts, dropping tail\n",
4999 __func__, layout_count);
5000 }
5001
5002 return 0;
5003 out_overflow:
5004 print_overflow_msg(__func__, xdr);
5005 return -EIO;
5006 }
5007 #endif /* CONFIG_NFS_V4_1 */
5008
5009 /*
5010 * END OF "GENERIC" DECODE ROUTINES.
5011 */
5012
5013 /*
5014 * Decode OPEN_DOWNGRADE response
5015 */
5016 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5017 struct xdr_stream *xdr,
5018 struct nfs_closeres *res)
5019 {
5020 struct compound_hdr hdr;
5021 int status;
5022
5023 status = decode_compound_hdr(xdr, &hdr);
5024 if (status)
5025 goto out;
5026 status = decode_sequence(xdr, &res->seq_res, rqstp);
5027 if (status)
5028 goto out;
5029 status = decode_putfh(xdr);
5030 if (status)
5031 goto out;
5032 status = decode_open_downgrade(xdr, res);
5033 if (status != 0)
5034 goto out;
5035 decode_getfattr(xdr, res->fattr, res->server,
5036 !RPC_IS_ASYNC(rqstp->rq_task));
5037 out:
5038 return status;
5039 }
5040
5041 /*
5042 * Decode ACCESS response
5043 */
5044 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5045 struct nfs4_accessres *res)
5046 {
5047 struct compound_hdr hdr;
5048 int status;
5049
5050 status = decode_compound_hdr(xdr, &hdr);
5051 if (status)
5052 goto out;
5053 status = decode_sequence(xdr, &res->seq_res, rqstp);
5054 if (status)
5055 goto out;
5056 status = decode_putfh(xdr);
5057 if (status != 0)
5058 goto out;
5059 status = decode_access(xdr, res);
5060 if (status != 0)
5061 goto out;
5062 decode_getfattr(xdr, res->fattr, res->server,
5063 !RPC_IS_ASYNC(rqstp->rq_task));
5064 out:
5065 return status;
5066 }
5067
5068 /*
5069 * Decode LOOKUP response
5070 */
5071 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5072 struct nfs4_lookup_res *res)
5073 {
5074 struct compound_hdr hdr;
5075 int status;
5076
5077 status = decode_compound_hdr(xdr, &hdr);
5078 if (status)
5079 goto out;
5080 status = decode_sequence(xdr, &res->seq_res, rqstp);
5081 if (status)
5082 goto out;
5083 status = decode_putfh(xdr);
5084 if (status)
5085 goto out;
5086 status = decode_lookup(xdr);
5087 if (status)
5088 goto out;
5089 status = decode_getfh(xdr, res->fh);
5090 if (status)
5091 goto out;
5092 status = decode_getfattr(xdr, res->fattr, res->server
5093 ,!RPC_IS_ASYNC(rqstp->rq_task));
5094 out:
5095 return status;
5096 }
5097
5098 /*
5099 * Decode LOOKUP_ROOT response
5100 */
5101 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5102 struct xdr_stream *xdr,
5103 struct nfs4_lookup_res *res)
5104 {
5105 struct compound_hdr hdr;
5106 int status;
5107
5108 status = decode_compound_hdr(xdr, &hdr);
5109 if (status)
5110 goto out;
5111 status = decode_sequence(xdr, &res->seq_res, rqstp);
5112 if (status)
5113 goto out;
5114 status = decode_putrootfh(xdr);
5115 if (status)
5116 goto out;
5117 status = decode_getfh(xdr, res->fh);
5118 if (status == 0)
5119 status = decode_getfattr(xdr, res->fattr, res->server,
5120 !RPC_IS_ASYNC(rqstp->rq_task));
5121 out:
5122 return status;
5123 }
5124
5125 /*
5126 * Decode REMOVE response
5127 */
5128 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5129 struct nfs_removeres *res)
5130 {
5131 struct compound_hdr hdr;
5132 int status;
5133
5134 status = decode_compound_hdr(xdr, &hdr);
5135 if (status)
5136 goto out;
5137 status = decode_sequence(xdr, &res->seq_res, rqstp);
5138 if (status)
5139 goto out;
5140 status = decode_putfh(xdr);
5141 if (status)
5142 goto out;
5143 status = decode_remove(xdr, &res->cinfo);
5144 if (status)
5145 goto out;
5146 decode_getfattr(xdr, res->dir_attr, res->server,
5147 !RPC_IS_ASYNC(rqstp->rq_task));
5148 out:
5149 return status;
5150 }
5151
5152 /*
5153 * Decode RENAME response
5154 */
5155 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5156 struct nfs_renameres *res)
5157 {
5158 struct compound_hdr hdr;
5159 int status;
5160
5161 status = decode_compound_hdr(xdr, &hdr);
5162 if (status)
5163 goto out;
5164 status = decode_sequence(xdr, &res->seq_res, rqstp);
5165 if (status)
5166 goto out;
5167 status = decode_putfh(xdr);
5168 if (status)
5169 goto out;
5170 status = decode_savefh(xdr);
5171 if (status)
5172 goto out;
5173 status = decode_putfh(xdr);
5174 if (status)
5175 goto out;
5176 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5177 if (status)
5178 goto out;
5179 /* Current FH is target directory */
5180 if (decode_getfattr(xdr, res->new_fattr, res->server,
5181 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5182 goto out;
5183 status = decode_restorefh(xdr);
5184 if (status)
5185 goto out;
5186 decode_getfattr(xdr, res->old_fattr, res->server,
5187 !RPC_IS_ASYNC(rqstp->rq_task));
5188 out:
5189 return status;
5190 }
5191
5192 /*
5193 * Decode LINK response
5194 */
5195 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5196 struct nfs4_link_res *res)
5197 {
5198 struct compound_hdr hdr;
5199 int status;
5200
5201 status = decode_compound_hdr(xdr, &hdr);
5202 if (status)
5203 goto out;
5204 status = decode_sequence(xdr, &res->seq_res, rqstp);
5205 if (status)
5206 goto out;
5207 status = decode_putfh(xdr);
5208 if (status)
5209 goto out;
5210 status = decode_savefh(xdr);
5211 if (status)
5212 goto out;
5213 status = decode_putfh(xdr);
5214 if (status)
5215 goto out;
5216 status = decode_link(xdr, &res->cinfo);
5217 if (status)
5218 goto out;
5219 /*
5220 * Note order: OP_LINK leaves the directory as the current
5221 * filehandle.
5222 */
5223 if (decode_getfattr(xdr, res->dir_attr, res->server,
5224 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5225 goto out;
5226 status = decode_restorefh(xdr);
5227 if (status)
5228 goto out;
5229 decode_getfattr(xdr, res->fattr, res->server,
5230 !RPC_IS_ASYNC(rqstp->rq_task));
5231 out:
5232 return status;
5233 }
5234
5235 /*
5236 * Decode CREATE response
5237 */
5238 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5239 struct nfs4_create_res *res)
5240 {
5241 struct compound_hdr hdr;
5242 int status;
5243
5244 status = decode_compound_hdr(xdr, &hdr);
5245 if (status)
5246 goto out;
5247 status = decode_sequence(xdr, &res->seq_res, rqstp);
5248 if (status)
5249 goto out;
5250 status = decode_putfh(xdr);
5251 if (status)
5252 goto out;
5253 status = decode_savefh(xdr);
5254 if (status)
5255 goto out;
5256 status = decode_create(xdr, &res->dir_cinfo);
5257 if (status)
5258 goto out;
5259 status = decode_getfh(xdr, res->fh);
5260 if (status)
5261 goto out;
5262 if (decode_getfattr(xdr, res->fattr, res->server,
5263 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5264 goto out;
5265 status = decode_restorefh(xdr);
5266 if (status)
5267 goto out;
5268 decode_getfattr(xdr, res->dir_fattr, res->server,
5269 !RPC_IS_ASYNC(rqstp->rq_task));
5270 out:
5271 return status;
5272 }
5273
5274 /*
5275 * Decode SYMLINK response
5276 */
5277 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5278 struct nfs4_create_res *res)
5279 {
5280 return nfs4_xdr_dec_create(rqstp, xdr, res);
5281 }
5282
5283 /*
5284 * Decode GETATTR response
5285 */
5286 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5287 struct nfs4_getattr_res *res)
5288 {
5289 struct compound_hdr hdr;
5290 int status;
5291
5292 status = decode_compound_hdr(xdr, &hdr);
5293 if (status)
5294 goto out;
5295 status = decode_sequence(xdr, &res->seq_res, rqstp);
5296 if (status)
5297 goto out;
5298 status = decode_putfh(xdr);
5299 if (status)
5300 goto out;
5301 status = decode_getfattr(xdr, res->fattr, res->server,
5302 !RPC_IS_ASYNC(rqstp->rq_task));
5303 out:
5304 return status;
5305 }
5306
5307 /*
5308 * Encode an SETACL request
5309 */
5310 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5311 struct nfs_setaclargs *args)
5312 {
5313 struct compound_hdr hdr = {
5314 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5315 };
5316
5317 encode_compound_hdr(xdr, req, &hdr);
5318 encode_sequence(xdr, &args->seq_args, &hdr);
5319 encode_putfh(xdr, args->fh, &hdr);
5320 encode_setacl(xdr, args, &hdr);
5321 encode_nops(&hdr);
5322 }
5323
5324 /*
5325 * Decode SETACL response
5326 */
5327 static int
5328 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5329 struct nfs_setaclres *res)
5330 {
5331 struct compound_hdr hdr;
5332 int status;
5333
5334 status = decode_compound_hdr(xdr, &hdr);
5335 if (status)
5336 goto out;
5337 status = decode_sequence(xdr, &res->seq_res, rqstp);
5338 if (status)
5339 goto out;
5340 status = decode_putfh(xdr);
5341 if (status)
5342 goto out;
5343 status = decode_setattr(xdr);
5344 out:
5345 return status;
5346 }
5347
5348 /*
5349 * Decode GETACL response
5350 */
5351 static int
5352 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5353 struct nfs_getaclres *res)
5354 {
5355 struct compound_hdr hdr;
5356 int status;
5357
5358 status = decode_compound_hdr(xdr, &hdr);
5359 if (status)
5360 goto out;
5361 status = decode_sequence(xdr, &res->seq_res, rqstp);
5362 if (status)
5363 goto out;
5364 status = decode_putfh(xdr);
5365 if (status)
5366 goto out;
5367 status = decode_getacl(xdr, rqstp, &res->acl_len);
5368
5369 out:
5370 return status;
5371 }
5372
5373 /*
5374 * Decode CLOSE response
5375 */
5376 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5377 struct nfs_closeres *res)
5378 {
5379 struct compound_hdr hdr;
5380 int status;
5381
5382 status = decode_compound_hdr(xdr, &hdr);
5383 if (status)
5384 goto out;
5385 status = decode_sequence(xdr, &res->seq_res, rqstp);
5386 if (status)
5387 goto out;
5388 status = decode_putfh(xdr);
5389 if (status)
5390 goto out;
5391 status = decode_close(xdr, res);
5392 if (status != 0)
5393 goto out;
5394 /*
5395 * Note: Server may do delete on close for this file
5396 * in which case the getattr call will fail with
5397 * an ESTALE error. Shouldn't be a problem,
5398 * though, since fattr->valid will remain unset.
5399 */
5400 decode_getfattr(xdr, res->fattr, res->server,
5401 !RPC_IS_ASYNC(rqstp->rq_task));
5402 out:
5403 return status;
5404 }
5405
5406 /*
5407 * Decode OPEN response
5408 */
5409 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5410 struct nfs_openres *res)
5411 {
5412 struct compound_hdr hdr;
5413 int status;
5414
5415 status = decode_compound_hdr(xdr, &hdr);
5416 if (status)
5417 goto out;
5418 status = decode_sequence(xdr, &res->seq_res, rqstp);
5419 if (status)
5420 goto out;
5421 status = decode_putfh(xdr);
5422 if (status)
5423 goto out;
5424 status = decode_savefh(xdr);
5425 if (status)
5426 goto out;
5427 status = decode_open(xdr, res);
5428 if (status)
5429 goto out;
5430 if (decode_getfh(xdr, &res->fh) != 0)
5431 goto out;
5432 if (decode_getfattr(xdr, res->f_attr, res->server,
5433 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5434 goto out;
5435 if (decode_restorefh(xdr) != 0)
5436 goto out;
5437 decode_getfattr(xdr, res->dir_attr, res->server,
5438 !RPC_IS_ASYNC(rqstp->rq_task));
5439 out:
5440 return status;
5441 }
5442
5443 /*
5444 * Decode OPEN_CONFIRM response
5445 */
5446 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5447 struct xdr_stream *xdr,
5448 struct nfs_open_confirmres *res)
5449 {
5450 struct compound_hdr hdr;
5451 int status;
5452
5453 status = decode_compound_hdr(xdr, &hdr);
5454 if (status)
5455 goto out;
5456 status = decode_putfh(xdr);
5457 if (status)
5458 goto out;
5459 status = decode_open_confirm(xdr, res);
5460 out:
5461 return status;
5462 }
5463
5464 /*
5465 * Decode OPEN response
5466 */
5467 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5468 struct xdr_stream *xdr,
5469 struct nfs_openres *res)
5470 {
5471 struct compound_hdr hdr;
5472 int status;
5473
5474 status = decode_compound_hdr(xdr, &hdr);
5475 if (status)
5476 goto out;
5477 status = decode_sequence(xdr, &res->seq_res, rqstp);
5478 if (status)
5479 goto out;
5480 status = decode_putfh(xdr);
5481 if (status)
5482 goto out;
5483 status = decode_open(xdr, res);
5484 if (status)
5485 goto out;
5486 decode_getfattr(xdr, res->f_attr, res->server,
5487 !RPC_IS_ASYNC(rqstp->rq_task));
5488 out:
5489 return status;
5490 }
5491
5492 /*
5493 * Decode SETATTR response
5494 */
5495 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5496 struct xdr_stream *xdr,
5497 struct nfs_setattrres *res)
5498 {
5499 struct compound_hdr hdr;
5500 int status;
5501
5502 status = decode_compound_hdr(xdr, &hdr);
5503 if (status)
5504 goto out;
5505 status = decode_sequence(xdr, &res->seq_res, rqstp);
5506 if (status)
5507 goto out;
5508 status = decode_putfh(xdr);
5509 if (status)
5510 goto out;
5511 status = decode_setattr(xdr);
5512 if (status)
5513 goto out;
5514 decode_getfattr(xdr, res->fattr, res->server,
5515 !RPC_IS_ASYNC(rqstp->rq_task));
5516 out:
5517 return status;
5518 }
5519
5520 /*
5521 * Decode LOCK response
5522 */
5523 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5524 struct nfs_lock_res *res)
5525 {
5526 struct compound_hdr hdr;
5527 int status;
5528
5529 status = decode_compound_hdr(xdr, &hdr);
5530 if (status)
5531 goto out;
5532 status = decode_sequence(xdr, &res->seq_res, rqstp);
5533 if (status)
5534 goto out;
5535 status = decode_putfh(xdr);
5536 if (status)
5537 goto out;
5538 status = decode_lock(xdr, res);
5539 out:
5540 return status;
5541 }
5542
5543 /*
5544 * Decode LOCKT response
5545 */
5546 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5547 struct nfs_lockt_res *res)
5548 {
5549 struct compound_hdr hdr;
5550 int status;
5551
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)
5560 goto out;
5561 status = decode_lockt(xdr, res);
5562 out:
5563 return status;
5564 }
5565
5566 /*
5567 * Decode LOCKU response
5568 */
5569 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5570 struct nfs_locku_res *res)
5571 {
5572 struct compound_hdr hdr;
5573 int status;
5574
5575 status = decode_compound_hdr(xdr, &hdr);
5576 if (status)
5577 goto out;
5578 status = decode_sequence(xdr, &res->seq_res, rqstp);
5579 if (status)
5580 goto out;
5581 status = decode_putfh(xdr);
5582 if (status)
5583 goto out;
5584 status = decode_locku(xdr, res);
5585 out:
5586 return status;
5587 }
5588
5589 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5590 struct xdr_stream *xdr, void *dummy)
5591 {
5592 struct compound_hdr hdr;
5593 int status;
5594
5595 status = decode_compound_hdr(xdr, &hdr);
5596 if (!status)
5597 status = decode_release_lockowner(xdr);
5598 return status;
5599 }
5600
5601 /*
5602 * Decode READLINK response
5603 */
5604 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5605 struct xdr_stream *xdr,
5606 struct nfs4_readlink_res *res)
5607 {
5608 struct compound_hdr hdr;
5609 int status;
5610
5611 status = decode_compound_hdr(xdr, &hdr);
5612 if (status)
5613 goto out;
5614 status = decode_sequence(xdr, &res->seq_res, rqstp);
5615 if (status)
5616 goto out;
5617 status = decode_putfh(xdr);
5618 if (status)
5619 goto out;
5620 status = decode_readlink(xdr, rqstp);
5621 out:
5622 return status;
5623 }
5624
5625 /*
5626 * Decode READDIR response
5627 */
5628 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5629 struct nfs4_readdir_res *res)
5630 {
5631 struct compound_hdr hdr;
5632 int status;
5633
5634 status = decode_compound_hdr(xdr, &hdr);
5635 if (status)
5636 goto out;
5637 status = decode_sequence(xdr, &res->seq_res, rqstp);
5638 if (status)
5639 goto out;
5640 status = decode_putfh(xdr);
5641 if (status)
5642 goto out;
5643 status = decode_readdir(xdr, rqstp, res);
5644 out:
5645 return status;
5646 }
5647
5648 /*
5649 * Decode Read response
5650 */
5651 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5652 struct nfs_readres *res)
5653 {
5654 struct compound_hdr hdr;
5655 int status;
5656
5657 status = decode_compound_hdr(xdr, &hdr);
5658 if (status)
5659 goto out;
5660 status = decode_sequence(xdr, &res->seq_res, rqstp);
5661 if (status)
5662 goto out;
5663 status = decode_putfh(xdr);
5664 if (status)
5665 goto out;
5666 status = decode_read(xdr, rqstp, res);
5667 if (!status)
5668 status = res->count;
5669 out:
5670 return status;
5671 }
5672
5673 /*
5674 * Decode WRITE response
5675 */
5676 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5677 struct nfs_writeres *res)
5678 {
5679 struct compound_hdr hdr;
5680 int status;
5681
5682 status = decode_compound_hdr(xdr, &hdr);
5683 if (status)
5684 goto out;
5685 status = decode_sequence(xdr, &res->seq_res, rqstp);
5686 if (status)
5687 goto out;
5688 status = decode_putfh(xdr);
5689 if (status)
5690 goto out;
5691 status = decode_write(xdr, res);
5692 if (status)
5693 goto out;
5694 decode_getfattr(xdr, res->fattr, res->server,
5695 !RPC_IS_ASYNC(rqstp->rq_task));
5696 if (!status)
5697 status = res->count;
5698 out:
5699 return status;
5700 }
5701
5702 /*
5703 * Decode COMMIT response
5704 */
5705 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5706 struct nfs_writeres *res)
5707 {
5708 struct compound_hdr hdr;
5709 int status;
5710
5711 status = decode_compound_hdr(xdr, &hdr);
5712 if (status)
5713 goto out;
5714 status = decode_sequence(xdr, &res->seq_res, rqstp);
5715 if (status)
5716 goto out;
5717 status = decode_putfh(xdr);
5718 if (status)
5719 goto out;
5720 status = decode_commit(xdr, res);
5721 if (status)
5722 goto out;
5723 decode_getfattr(xdr, res->fattr, res->server,
5724 !RPC_IS_ASYNC(rqstp->rq_task));
5725 out:
5726 return status;
5727 }
5728
5729 /*
5730 * Decode FSINFO response
5731 */
5732 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5733 struct nfs4_fsinfo_res *res)
5734 {
5735 struct compound_hdr hdr;
5736 int status;
5737
5738 status = decode_compound_hdr(xdr, &hdr);
5739 if (!status)
5740 status = decode_sequence(xdr, &res->seq_res, req);
5741 if (!status)
5742 status = decode_putfh(xdr);
5743 if (!status)
5744 status = decode_fsinfo(xdr, res->fsinfo);
5745 return status;
5746 }
5747
5748 /*
5749 * Decode PATHCONF response
5750 */
5751 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5752 struct nfs4_pathconf_res *res)
5753 {
5754 struct compound_hdr hdr;
5755 int status;
5756
5757 status = decode_compound_hdr(xdr, &hdr);
5758 if (!status)
5759 status = decode_sequence(xdr, &res->seq_res, req);
5760 if (!status)
5761 status = decode_putfh(xdr);
5762 if (!status)
5763 status = decode_pathconf(xdr, res->pathconf);
5764 return status;
5765 }
5766
5767 /*
5768 * Decode STATFS response
5769 */
5770 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5771 struct nfs4_statfs_res *res)
5772 {
5773 struct compound_hdr hdr;
5774 int status;
5775
5776 status = decode_compound_hdr(xdr, &hdr);
5777 if (!status)
5778 status = decode_sequence(xdr, &res->seq_res, req);
5779 if (!status)
5780 status = decode_putfh(xdr);
5781 if (!status)
5782 status = decode_statfs(xdr, res->fsstat);
5783 return status;
5784 }
5785
5786 /*
5787 * Decode GETATTR_BITMAP response
5788 */
5789 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5790 struct xdr_stream *xdr,
5791 struct nfs4_server_caps_res *res)
5792 {
5793 struct compound_hdr hdr;
5794 int status;
5795
5796 status = decode_compound_hdr(xdr, &hdr);
5797 if (status)
5798 goto out;
5799 status = decode_sequence(xdr, &res->seq_res, req);
5800 if (status)
5801 goto out;
5802 status = decode_putfh(xdr);
5803 if (status)
5804 goto out;
5805 status = decode_server_caps(xdr, res);
5806 out:
5807 return status;
5808 }
5809
5810 /*
5811 * Decode RENEW response
5812 */
5813 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5814 void *__unused)
5815 {
5816 struct compound_hdr hdr;
5817 int status;
5818
5819 status = decode_compound_hdr(xdr, &hdr);
5820 if (!status)
5821 status = decode_renew(xdr);
5822 return status;
5823 }
5824
5825 /*
5826 * Decode SETCLIENTID response
5827 */
5828 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5829 struct xdr_stream *xdr,
5830 struct nfs4_setclientid_res *res)
5831 {
5832 struct compound_hdr hdr;
5833 int status;
5834
5835 status = decode_compound_hdr(xdr, &hdr);
5836 if (!status)
5837 status = decode_setclientid(xdr, res);
5838 return status;
5839 }
5840
5841 /*
5842 * Decode SETCLIENTID_CONFIRM response
5843 */
5844 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5845 struct xdr_stream *xdr,
5846 struct nfs_fsinfo *fsinfo)
5847 {
5848 struct compound_hdr hdr;
5849 int status;
5850
5851 status = decode_compound_hdr(xdr, &hdr);
5852 if (!status)
5853 status = decode_setclientid_confirm(xdr);
5854 if (!status)
5855 status = decode_putrootfh(xdr);
5856 if (!status)
5857 status = decode_fsinfo(xdr, fsinfo);
5858 return status;
5859 }
5860
5861 /*
5862 * Decode DELEGRETURN response
5863 */
5864 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5865 struct xdr_stream *xdr,
5866 struct nfs4_delegreturnres *res)
5867 {
5868 struct compound_hdr hdr;
5869 int status;
5870
5871 status = decode_compound_hdr(xdr, &hdr);
5872 if (status)
5873 goto out;
5874 status = decode_sequence(xdr, &res->seq_res, rqstp);
5875 if (status)
5876 goto out;
5877 status = decode_putfh(xdr);
5878 if (status != 0)
5879 goto out;
5880 status = decode_delegreturn(xdr);
5881 if (status != 0)
5882 goto out;
5883 decode_getfattr(xdr, res->fattr, res->server,
5884 !RPC_IS_ASYNC(rqstp->rq_task));
5885 out:
5886 return status;
5887 }
5888
5889 /*
5890 * Decode FS_LOCATIONS response
5891 */
5892 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
5893 struct xdr_stream *xdr,
5894 struct nfs4_fs_locations_res *res)
5895 {
5896 struct compound_hdr hdr;
5897 int status;
5898
5899 status = decode_compound_hdr(xdr, &hdr);
5900 if (status)
5901 goto out;
5902 status = decode_sequence(xdr, &res->seq_res, req);
5903 if (status)
5904 goto out;
5905 status = decode_putfh(xdr);
5906 if (status)
5907 goto out;
5908 status = decode_lookup(xdr);
5909 if (status)
5910 goto out;
5911 xdr_enter_page(xdr, PAGE_SIZE);
5912 status = decode_getfattr(xdr, &res->fs_locations->fattr,
5913 res->fs_locations->server,
5914 !RPC_IS_ASYNC(req->rq_task));
5915 out:
5916 return status;
5917 }
5918
5919 #if defined(CONFIG_NFS_V4_1)
5920 /*
5921 * Decode EXCHANGE_ID response
5922 */
5923 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
5924 struct xdr_stream *xdr,
5925 void *res)
5926 {
5927 struct compound_hdr hdr;
5928 int status;
5929
5930 status = decode_compound_hdr(xdr, &hdr);
5931 if (!status)
5932 status = decode_exchange_id(xdr, res);
5933 return status;
5934 }
5935
5936 /*
5937 * Decode CREATE_SESSION response
5938 */
5939 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
5940 struct xdr_stream *xdr,
5941 struct nfs41_create_session_res *res)
5942 {
5943 struct compound_hdr hdr;
5944 int status;
5945
5946 status = decode_compound_hdr(xdr, &hdr);
5947 if (!status)
5948 status = decode_create_session(xdr, res);
5949 return status;
5950 }
5951
5952 /*
5953 * Decode DESTROY_SESSION response
5954 */
5955 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
5956 struct xdr_stream *xdr,
5957 void *res)
5958 {
5959 struct compound_hdr hdr;
5960 int status;
5961
5962 status = decode_compound_hdr(xdr, &hdr);
5963 if (!status)
5964 status = decode_destroy_session(xdr, res);
5965 return status;
5966 }
5967
5968 /*
5969 * Decode SEQUENCE response
5970 */
5971 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
5972 struct xdr_stream *xdr,
5973 struct nfs4_sequence_res *res)
5974 {
5975 struct compound_hdr hdr;
5976 int status;
5977
5978 status = decode_compound_hdr(xdr, &hdr);
5979 if (!status)
5980 status = decode_sequence(xdr, res, rqstp);
5981 return status;
5982 }
5983
5984 /*
5985 * Decode GET_LEASE_TIME response
5986 */
5987 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
5988 struct xdr_stream *xdr,
5989 struct nfs4_get_lease_time_res *res)
5990 {
5991 struct compound_hdr hdr;
5992 int status;
5993
5994 status = decode_compound_hdr(xdr, &hdr);
5995 if (!status)
5996 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
5997 if (!status)
5998 status = decode_putrootfh(xdr);
5999 if (!status)
6000 status = decode_fsinfo(xdr, res->lr_fsinfo);
6001 return status;
6002 }
6003
6004 /*
6005 * Decode RECLAIM_COMPLETE response
6006 */
6007 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6008 struct xdr_stream *xdr,
6009 struct nfs41_reclaim_complete_res *res)
6010 {
6011 struct compound_hdr hdr;
6012 int status;
6013
6014 status = decode_compound_hdr(xdr, &hdr);
6015 if (!status)
6016 status = decode_sequence(xdr, &res->seq_res, rqstp);
6017 if (!status)
6018 status = decode_reclaim_complete(xdr, (void *)NULL);
6019 return status;
6020 }
6021
6022 /*
6023 * Decode GETDEVINFO response
6024 */
6025 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6026 struct xdr_stream *xdr,
6027 struct nfs4_getdeviceinfo_res *res)
6028 {
6029 struct compound_hdr hdr;
6030 int status;
6031
6032 status = decode_compound_hdr(xdr, &hdr);
6033 if (status != 0)
6034 goto out;
6035 status = decode_sequence(xdr, &res->seq_res, rqstp);
6036 if (status != 0)
6037 goto out;
6038 status = decode_getdeviceinfo(xdr, res->pdev);
6039 out:
6040 return status;
6041 }
6042
6043 /*
6044 * Decode LAYOUTGET response
6045 */
6046 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6047 struct xdr_stream *xdr,
6048 struct nfs4_layoutget_res *res)
6049 {
6050 struct compound_hdr hdr;
6051 int status;
6052
6053 status = decode_compound_hdr(xdr, &hdr);
6054 if (status)
6055 goto out;
6056 status = decode_sequence(xdr, &res->seq_res, rqstp);
6057 if (status)
6058 goto out;
6059 status = decode_putfh(xdr);
6060 if (status)
6061 goto out;
6062 status = decode_layoutget(xdr, rqstp, res);
6063 out:
6064 return status;
6065 }
6066 #endif /* CONFIG_NFS_V4_1 */
6067
6068 /**
6069 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6070 * the local page cache.
6071 * @xdr: XDR stream where entry resides
6072 * @entry: buffer to fill in with entry data
6073 * @plus: boolean indicating whether this should be a readdirplus entry
6074 *
6075 * Returns zero if successful, otherwise a negative errno value is
6076 * returned.
6077 *
6078 * This function is not invoked during READDIR reply decoding, but
6079 * rather whenever an application invokes the getdents(2) system call
6080 * on a directory already in our cache.
6081 */
6082 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6083 int plus)
6084 {
6085 uint32_t bitmap[2] = {0};
6086 uint32_t len;
6087 __be32 *p = xdr_inline_decode(xdr, 4);
6088 if (unlikely(!p))
6089 goto out_overflow;
6090 if (!ntohl(*p++)) {
6091 p = xdr_inline_decode(xdr, 4);
6092 if (unlikely(!p))
6093 goto out_overflow;
6094 if (!ntohl(*p++))
6095 return -EAGAIN;
6096 entry->eof = 1;
6097 return -EBADCOOKIE;
6098 }
6099
6100 p = xdr_inline_decode(xdr, 12);
6101 if (unlikely(!p))
6102 goto out_overflow;
6103 entry->prev_cookie = entry->cookie;
6104 p = xdr_decode_hyper(p, &entry->cookie);
6105 entry->len = ntohl(*p++);
6106
6107 p = xdr_inline_decode(xdr, entry->len);
6108 if (unlikely(!p))
6109 goto out_overflow;
6110 entry->name = (const char *) p;
6111
6112 /*
6113 * In case the server doesn't return an inode number,
6114 * we fake one here. (We don't use inode number 0,
6115 * since glibc seems to choke on it...)
6116 */
6117 entry->ino = 1;
6118 entry->fattr->valid = 0;
6119
6120 if (decode_attr_bitmap(xdr, bitmap) < 0)
6121 goto out_overflow;
6122
6123 if (decode_attr_length(xdr, &len, &p) < 0)
6124 goto out_overflow;
6125
6126 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6127 entry->server, 1) < 0)
6128 goto out_overflow;
6129 if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6130 entry->ino = entry->fattr->fileid;
6131
6132 entry->d_type = DT_UNKNOWN;
6133 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6134 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6135
6136 if (verify_attr_len(xdr, p, len) < 0)
6137 goto out_overflow;
6138
6139 p = xdr_inline_peek(xdr, 8);
6140 if (p != NULL)
6141 entry->eof = !p[0] && p[1];
6142 else
6143 entry->eof = 0;
6144
6145 return 0;
6146
6147 out_overflow:
6148 print_overflow_msg(__func__, xdr);
6149 return -EAGAIN;
6150 }
6151
6152 /*
6153 * We need to translate between nfs status return values and
6154 * the local errno values which may not be the same.
6155 */
6156 static struct {
6157 int stat;
6158 int errno;
6159 } nfs_errtbl[] = {
6160 { NFS4_OK, 0 },
6161 { NFS4ERR_PERM, -EPERM },
6162 { NFS4ERR_NOENT, -ENOENT },
6163 { NFS4ERR_IO, -errno_NFSERR_IO},
6164 { NFS4ERR_NXIO, -ENXIO },
6165 { NFS4ERR_ACCESS, -EACCES },
6166 { NFS4ERR_EXIST, -EEXIST },
6167 { NFS4ERR_XDEV, -EXDEV },
6168 { NFS4ERR_NOTDIR, -ENOTDIR },
6169 { NFS4ERR_ISDIR, -EISDIR },
6170 { NFS4ERR_INVAL, -EINVAL },
6171 { NFS4ERR_FBIG, -EFBIG },
6172 { NFS4ERR_NOSPC, -ENOSPC },
6173 { NFS4ERR_ROFS, -EROFS },
6174 { NFS4ERR_MLINK, -EMLINK },
6175 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
6176 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
6177 { NFS4ERR_DQUOT, -EDQUOT },
6178 { NFS4ERR_STALE, -ESTALE },
6179 { NFS4ERR_BADHANDLE, -EBADHANDLE },
6180 { NFS4ERR_BADOWNER, -EINVAL },
6181 { NFS4ERR_BADNAME, -EINVAL },
6182 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
6183 { NFS4ERR_NOTSUPP, -ENOTSUPP },
6184 { NFS4ERR_TOOSMALL, -ETOOSMALL },
6185 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
6186 { NFS4ERR_BADTYPE, -EBADTYPE },
6187 { NFS4ERR_LOCKED, -EAGAIN },
6188 { NFS4ERR_SYMLINK, -ELOOP },
6189 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
6190 { NFS4ERR_DEADLOCK, -EDEADLK },
6191 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
6192 * to be handled by a
6193 * middle-layer.
6194 */
6195 { -1, -EIO }
6196 };
6197
6198 /*
6199 * Convert an NFS error code to a local one.
6200 * This one is used jointly by NFSv2 and NFSv3.
6201 */
6202 static int
6203 nfs4_stat_to_errno(int stat)
6204 {
6205 int i;
6206 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6207 if (nfs_errtbl[i].stat == stat)
6208 return nfs_errtbl[i].errno;
6209 }
6210 if (stat <= 10000 || stat > 10100) {
6211 /* The server is looney tunes. */
6212 return -EREMOTEIO;
6213 }
6214 /* If we cannot translate the error, the recovery routines should
6215 * handle it.
6216 * Note: remaining NFSv4 error codes have values > 10000, so should
6217 * not conflict with native Linux error codes.
6218 */
6219 return -stat;
6220 }
6221
6222 #define PROC(proc, argtype, restype) \
6223 [NFSPROC4_CLNT_##proc] = { \
6224 .p_proc = NFSPROC4_COMPOUND, \
6225 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
6226 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
6227 .p_arglen = NFS4_##argtype##_sz, \
6228 .p_replen = NFS4_##restype##_sz, \
6229 .p_statidx = NFSPROC4_CLNT_##proc, \
6230 .p_name = #proc, \
6231 }
6232
6233 struct rpc_procinfo nfs4_procedures[] = {
6234 PROC(READ, enc_read, dec_read),
6235 PROC(WRITE, enc_write, dec_write),
6236 PROC(COMMIT, enc_commit, dec_commit),
6237 PROC(OPEN, enc_open, dec_open),
6238 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
6239 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
6240 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
6241 PROC(CLOSE, enc_close, dec_close),
6242 PROC(SETATTR, enc_setattr, dec_setattr),
6243 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
6244 PROC(RENEW, enc_renew, dec_renew),
6245 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
6246 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6247 PROC(LOCK, enc_lock, dec_lock),
6248 PROC(LOCKT, enc_lockt, dec_lockt),
6249 PROC(LOCKU, enc_locku, dec_locku),
6250 PROC(ACCESS, enc_access, dec_access),
6251 PROC(GETATTR, enc_getattr, dec_getattr),
6252 PROC(LOOKUP, enc_lookup, dec_lookup),
6253 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
6254 PROC(REMOVE, enc_remove, dec_remove),
6255 PROC(RENAME, enc_rename, dec_rename),
6256 PROC(LINK, enc_link, dec_link),
6257 PROC(SYMLINK, enc_symlink, dec_symlink),
6258 PROC(CREATE, enc_create, dec_create),
6259 PROC(PATHCONF, enc_pathconf, dec_pathconf),
6260 PROC(STATFS, enc_statfs, dec_statfs),
6261 PROC(READLINK, enc_readlink, dec_readlink),
6262 PROC(READDIR, enc_readdir, dec_readdir),
6263 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
6264 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
6265 PROC(GETACL, enc_getacl, dec_getacl),
6266 PROC(SETACL, enc_setacl, dec_setacl),
6267 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
6268 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
6269 #if defined(CONFIG_NFS_V4_1)
6270 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
6271 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
6272 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
6273 PROC(SEQUENCE, enc_sequence, dec_sequence),
6274 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
6275 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
6276 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
6277 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
6278 #endif /* CONFIG_NFS_V4_1 */
6279 };
6280
6281 struct rpc_version nfs_version4 = {
6282 .number = 4,
6283 .nrprocs = ARRAY_SIZE(nfs4_procedures),
6284 .procs = nfs4_procedures
6285 };
6286
6287 /*
6288 * Local variables:
6289 * c-basic-offset: 8
6290 * End:
6291 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree