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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob20b4e30e6c828e5e0aed77ea01c445a52caab0ee
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/slab.h>
42 #include <linux/errno.h>
43 #include <linux/string.h>
44 #include <linux/in.h>
45 #include <linux/pagemap.h>
46 #include <linux/proc_fs.h>
47 #include <linux/kdev_t.h>
48 #include <linux/sunrpc/clnt.h>
49 #include <linux/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
55 #define NFSDBG_FACILITY NFSDBG_XDR
56
57 /* Mapping from NFS error code to "errno" error code. */
58 #define errno_NFSERR_IO EIO
59
60 static int nfs4_stat_to_errno(int);
61
62 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
63 #ifdef DEBUG
64 #define NFS4_MAXTAGLEN 20
65 #else
66 #define NFS4_MAXTAGLEN 0
67 #endif
68
69 /* lock,open owner id:
70 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
71 */
72 #define open_owner_id_maxsz (1 + 4)
73 #define lock_owner_id_maxsz (1 + 4)
74 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
75 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
76 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
77 #define op_encode_hdr_maxsz (1)
78 #define op_decode_hdr_maxsz (2)
79 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
80 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
81 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
82 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
83 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
84 (NFS4_FHSIZE >> 2))
85 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
86 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
87 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
88 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
89 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
90 ((3+NFS4_FHSIZE) >> 2))
91 #define nfs4_fattr_bitmap_maxsz 3
92 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
93 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
94 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
95 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
96 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
97 /* This is based on getfattr, which uses the most attributes: */
98 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
99 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
100 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
101 nfs4_fattr_value_maxsz)
102 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
103 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
104 1 + 2 + 1 + \
105 nfs4_owner_maxsz + \
106 nfs4_group_maxsz + \
107 4 + 4)
108 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
109 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
110 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
111 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
112 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
113 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
114 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
115 #define decode_renew_maxsz (op_decode_hdr_maxsz)
116 #define encode_setclientid_maxsz \
117 (op_encode_hdr_maxsz + \
118 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
119 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
120 1 /* sc_prog */ + \
121 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
122 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
123 1) /* sc_cb_ident */
124 #define decode_setclientid_maxsz \
125 (op_decode_hdr_maxsz + \
126 2 + \
127 1024) /* large value for CLID_INUSE */
128 #define encode_setclientid_confirm_maxsz \
129 (op_encode_hdr_maxsz + \
130 3 + (NFS4_VERIFIER_SIZE >> 2))
131 #define decode_setclientid_confirm_maxsz \
132 (op_decode_hdr_maxsz)
133 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
134 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
135 #define encode_share_access_maxsz \
136 (2)
137 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
138 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
139 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
140 #define encode_open_maxsz (op_encode_hdr_maxsz + \
141 2 + encode_share_access_maxsz + 2 + \
142 open_owner_id_maxsz + \
143 encode_opentype_maxsz + \
144 encode_claim_null_maxsz)
145 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
146 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
147 decode_ace_maxsz)
148 #define decode_change_info_maxsz (5)
149 #define decode_open_maxsz (op_decode_hdr_maxsz + \
150 decode_stateid_maxsz + \
151 decode_change_info_maxsz + 1 + \
152 nfs4_fattr_bitmap_maxsz + \
153 decode_delegation_maxsz)
154 #define encode_open_confirm_maxsz \
155 (op_encode_hdr_maxsz + \
156 encode_stateid_maxsz + 1)
157 #define decode_open_confirm_maxsz \
158 (op_decode_hdr_maxsz + \
159 decode_stateid_maxsz)
160 #define encode_open_downgrade_maxsz \
161 (op_encode_hdr_maxsz + \
162 encode_stateid_maxsz + 1 + \
163 encode_share_access_maxsz)
164 #define decode_open_downgrade_maxsz \
165 (op_decode_hdr_maxsz + \
166 decode_stateid_maxsz)
167 #define encode_close_maxsz (op_encode_hdr_maxsz + \
168 1 + encode_stateid_maxsz)
169 #define decode_close_maxsz (op_decode_hdr_maxsz + \
170 decode_stateid_maxsz)
171 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
172 encode_stateid_maxsz + \
173 encode_attrs_maxsz)
174 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
175 nfs4_fattr_bitmap_maxsz)
176 #define encode_read_maxsz (op_encode_hdr_maxsz + \
177 encode_stateid_maxsz + 3)
178 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
179 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
180 2 + encode_verifier_maxsz + 5)
181 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
182 decode_verifier_maxsz)
183 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
184 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
185 #define encode_write_maxsz (op_encode_hdr_maxsz + \
186 encode_stateid_maxsz + 4)
187 #define decode_write_maxsz (op_decode_hdr_maxsz + \
188 2 + decode_verifier_maxsz)
189 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
190 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
191 decode_verifier_maxsz)
192 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
193 nfs4_name_maxsz)
194 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
195 decode_change_info_maxsz)
196 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
197 2 * nfs4_name_maxsz)
198 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
199 decode_change_info_maxsz + \
200 decode_change_info_maxsz)
201 #define encode_link_maxsz (op_encode_hdr_maxsz + \
202 nfs4_name_maxsz)
203 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
204 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
205 7 + \
206 1 + encode_stateid_maxsz + 8)
207 #define decode_lock_denied_maxsz \
208 (8 + decode_lockowner_maxsz)
209 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
210 decode_lock_denied_maxsz)
211 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 12)
212 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
213 decode_lock_denied_maxsz)
214 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
215 encode_stateid_maxsz + \
216 4)
217 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
218 decode_stateid_maxsz)
219 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
220 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
221 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
222 1 + nfs4_name_maxsz + \
223 1 + \
224 nfs4_fattr_maxsz)
225 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
226 #define encode_create_maxsz (op_encode_hdr_maxsz + \
227 1 + 2 + nfs4_name_maxsz + \
228 encode_attrs_maxsz)
229 #define decode_create_maxsz (op_decode_hdr_maxsz + \
230 decode_change_info_maxsz + \
231 nfs4_fattr_bitmap_maxsz)
232 #define encode_statfs_maxsz (encode_getattr_maxsz)
233 #define decode_statfs_maxsz (decode_getattr_maxsz)
234 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
235 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
236 #define encode_getacl_maxsz (encode_getattr_maxsz)
237 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
238 nfs4_fattr_bitmap_maxsz + 1)
239 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
240 encode_stateid_maxsz + 3)
241 #define decode_setacl_maxsz (decode_setattr_maxsz)
242 #define encode_fs_locations_maxsz \
243 (encode_getattr_maxsz)
244 #define decode_fs_locations_maxsz \
245 (0)
246
247 #if defined(CONFIG_NFS_V4_1)
248 #define NFS4_MAX_MACHINE_NAME_LEN (64)
249
250 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
251 encode_verifier_maxsz + \
252 1 /* co_ownerid.len */ + \
253 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
254 1 /* flags */ + \
255 1 /* spa_how */ + \
256 0 /* SP4_NONE (for now) */ + \
257 1 /* zero implemetation id array */)
258 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
259 2 /* eir_clientid */ + \
260 1 /* eir_sequenceid */ + \
261 1 /* eir_flags */ + \
262 1 /* spr_how */ + \
263 0 /* SP4_NONE (for now) */ + \
264 2 /* eir_server_owner.so_minor_id */ + \
265 /* eir_server_owner.so_major_id<> */ \
266 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
267 /* eir_server_scope<> */ \
268 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
269 1 /* eir_server_impl_id array length */ + \
270 0 /* ignored eir_server_impl_id contents */)
271 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
272 #define decode_channel_attrs_maxsz (6 + \
273 1 /* ca_rdma_ird.len */ + \
274 1 /* ca_rdma_ird */)
275 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
276 2 /* csa_clientid */ + \
277 1 /* csa_sequence */ + \
278 1 /* csa_flags */ + \
279 encode_channel_attrs_maxsz + \
280 encode_channel_attrs_maxsz + \
281 1 /* csa_cb_program */ + \
282 1 /* csa_sec_parms.len (1) */ + \
283 1 /* cb_secflavor (AUTH_SYS) */ + \
284 1 /* stamp */ + \
285 1 /* machinename.len */ + \
286 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
287 1 /* uid */ + \
288 1 /* gid */ + \
289 1 /* gids.len (0) */)
290 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
291 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
292 1 /* csr_sequence */ + \
293 1 /* csr_flags */ + \
294 decode_channel_attrs_maxsz + \
295 decode_channel_attrs_maxsz)
296 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
297 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
298 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
299 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
300 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
301 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
302 #else /* CONFIG_NFS_V4_1 */
303 #define encode_sequence_maxsz 0
304 #define decode_sequence_maxsz 0
305 #endif /* CONFIG_NFS_V4_1 */
306
307 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
308 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
309 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
310 encode_sequence_maxsz + \
311 encode_putfh_maxsz + \
312 encode_read_maxsz)
313 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
314 decode_sequence_maxsz + \
315 decode_putfh_maxsz + \
316 decode_read_maxsz)
317 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
318 encode_sequence_maxsz + \
319 encode_putfh_maxsz + \
320 encode_readlink_maxsz)
321 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
322 decode_sequence_maxsz + \
323 decode_putfh_maxsz + \
324 decode_readlink_maxsz)
325 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
326 encode_sequence_maxsz + \
327 encode_putfh_maxsz + \
328 encode_readdir_maxsz)
329 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
330 decode_sequence_maxsz + \
331 decode_putfh_maxsz + \
332 decode_readdir_maxsz)
333 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
334 encode_sequence_maxsz + \
335 encode_putfh_maxsz + \
336 encode_write_maxsz + \
337 encode_getattr_maxsz)
338 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
339 decode_sequence_maxsz + \
340 decode_putfh_maxsz + \
341 decode_write_maxsz + \
342 decode_getattr_maxsz)
343 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
344 encode_sequence_maxsz + \
345 encode_putfh_maxsz + \
346 encode_commit_maxsz + \
347 encode_getattr_maxsz)
348 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
349 decode_sequence_maxsz + \
350 decode_putfh_maxsz + \
351 decode_commit_maxsz + \
352 decode_getattr_maxsz)
353 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
354 encode_sequence_maxsz + \
355 encode_putfh_maxsz + \
356 encode_savefh_maxsz + \
357 encode_open_maxsz + \
358 encode_getfh_maxsz + \
359 encode_getattr_maxsz + \
360 encode_restorefh_maxsz + \
361 encode_getattr_maxsz)
362 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
363 decode_sequence_maxsz + \
364 decode_putfh_maxsz + \
365 decode_savefh_maxsz + \
366 decode_open_maxsz + \
367 decode_getfh_maxsz + \
368 decode_getattr_maxsz + \
369 decode_restorefh_maxsz + \
370 decode_getattr_maxsz)
371 #define NFS4_enc_open_confirm_sz \
372 (compound_encode_hdr_maxsz + \
373 encode_putfh_maxsz + \
374 encode_open_confirm_maxsz)
375 #define NFS4_dec_open_confirm_sz \
376 (compound_decode_hdr_maxsz + \
377 decode_putfh_maxsz + \
378 decode_open_confirm_maxsz)
379 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
380 encode_sequence_maxsz + \
381 encode_putfh_maxsz + \
382 encode_open_maxsz + \
383 encode_getattr_maxsz)
384 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
385 decode_sequence_maxsz + \
386 decode_putfh_maxsz + \
387 decode_open_maxsz + \
388 decode_getattr_maxsz)
389 #define NFS4_enc_open_downgrade_sz \
390 (compound_encode_hdr_maxsz + \
391 encode_sequence_maxsz + \
392 encode_putfh_maxsz + \
393 encode_open_downgrade_maxsz + \
394 encode_getattr_maxsz)
395 #define NFS4_dec_open_downgrade_sz \
396 (compound_decode_hdr_maxsz + \
397 decode_sequence_maxsz + \
398 decode_putfh_maxsz + \
399 decode_open_downgrade_maxsz + \
400 decode_getattr_maxsz)
401 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
402 encode_sequence_maxsz + \
403 encode_putfh_maxsz + \
404 encode_close_maxsz + \
405 encode_getattr_maxsz)
406 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
407 decode_sequence_maxsz + \
408 decode_putfh_maxsz + \
409 decode_close_maxsz + \
410 decode_getattr_maxsz)
411 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
412 encode_sequence_maxsz + \
413 encode_putfh_maxsz + \
414 encode_setattr_maxsz + \
415 encode_getattr_maxsz)
416 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
417 decode_sequence_maxsz + \
418 decode_putfh_maxsz + \
419 decode_setattr_maxsz + \
420 decode_getattr_maxsz)
421 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
422 encode_sequence_maxsz + \
423 encode_putfh_maxsz + \
424 encode_fsinfo_maxsz)
425 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
426 decode_sequence_maxsz + \
427 decode_putfh_maxsz + \
428 decode_fsinfo_maxsz)
429 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
430 encode_renew_maxsz)
431 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
432 decode_renew_maxsz)
433 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
434 encode_setclientid_maxsz)
435 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
436 decode_setclientid_maxsz)
437 #define NFS4_enc_setclientid_confirm_sz \
438 (compound_encode_hdr_maxsz + \
439 encode_setclientid_confirm_maxsz + \
440 encode_putrootfh_maxsz + \
441 encode_fsinfo_maxsz)
442 #define NFS4_dec_setclientid_confirm_sz \
443 (compound_decode_hdr_maxsz + \
444 decode_setclientid_confirm_maxsz + \
445 decode_putrootfh_maxsz + \
446 decode_fsinfo_maxsz)
447 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
448 encode_sequence_maxsz + \
449 encode_putfh_maxsz + \
450 encode_lock_maxsz)
451 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
452 decode_sequence_maxsz + \
453 decode_putfh_maxsz + \
454 decode_lock_maxsz)
455 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
456 encode_sequence_maxsz + \
457 encode_putfh_maxsz + \
458 encode_lockt_maxsz)
459 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
460 decode_sequence_maxsz + \
461 decode_putfh_maxsz + \
462 decode_lockt_maxsz)
463 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_locku_maxsz)
467 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
468 decode_sequence_maxsz + \
469 decode_putfh_maxsz + \
470 decode_locku_maxsz)
471 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
472 encode_sequence_maxsz + \
473 encode_putfh_maxsz + \
474 encode_access_maxsz + \
475 encode_getattr_maxsz)
476 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
477 decode_sequence_maxsz + \
478 decode_putfh_maxsz + \
479 decode_access_maxsz + \
480 decode_getattr_maxsz)
481 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
482 encode_sequence_maxsz + \
483 encode_putfh_maxsz + \
484 encode_getattr_maxsz)
485 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
486 decode_sequence_maxsz + \
487 decode_putfh_maxsz + \
488 decode_getattr_maxsz)
489 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
490 encode_sequence_maxsz + \
491 encode_putfh_maxsz + \
492 encode_lookup_maxsz + \
493 encode_getattr_maxsz + \
494 encode_getfh_maxsz)
495 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
496 decode_sequence_maxsz + \
497 decode_putfh_maxsz + \
498 decode_lookup_maxsz + \
499 decode_getattr_maxsz + \
500 decode_getfh_maxsz)
501 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
502 encode_sequence_maxsz + \
503 encode_putrootfh_maxsz + \
504 encode_getattr_maxsz + \
505 encode_getfh_maxsz)
506 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
507 decode_sequence_maxsz + \
508 decode_putrootfh_maxsz + \
509 decode_getattr_maxsz + \
510 decode_getfh_maxsz)
511 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
512 encode_sequence_maxsz + \
513 encode_putfh_maxsz + \
514 encode_remove_maxsz + \
515 encode_getattr_maxsz)
516 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
517 decode_sequence_maxsz + \
518 decode_putfh_maxsz + \
519 decode_remove_maxsz + \
520 decode_getattr_maxsz)
521 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
522 encode_sequence_maxsz + \
523 encode_putfh_maxsz + \
524 encode_savefh_maxsz + \
525 encode_putfh_maxsz + \
526 encode_rename_maxsz + \
527 encode_getattr_maxsz + \
528 encode_restorefh_maxsz + \
529 encode_getattr_maxsz)
530 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
531 decode_sequence_maxsz + \
532 decode_putfh_maxsz + \
533 decode_savefh_maxsz + \
534 decode_putfh_maxsz + \
535 decode_rename_maxsz + \
536 decode_getattr_maxsz + \
537 decode_restorefh_maxsz + \
538 decode_getattr_maxsz)
539 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
540 encode_sequence_maxsz + \
541 encode_putfh_maxsz + \
542 encode_savefh_maxsz + \
543 encode_putfh_maxsz + \
544 encode_link_maxsz + \
545 decode_getattr_maxsz + \
546 encode_restorefh_maxsz + \
547 decode_getattr_maxsz)
548 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
549 decode_sequence_maxsz + \
550 decode_putfh_maxsz + \
551 decode_savefh_maxsz + \
552 decode_putfh_maxsz + \
553 decode_link_maxsz + \
554 decode_getattr_maxsz + \
555 decode_restorefh_maxsz + \
556 decode_getattr_maxsz)
557 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_symlink_maxsz + \
561 encode_getattr_maxsz + \
562 encode_getfh_maxsz)
563 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
564 decode_sequence_maxsz + \
565 decode_putfh_maxsz + \
566 decode_symlink_maxsz + \
567 decode_getattr_maxsz + \
568 decode_getfh_maxsz)
569 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
570 encode_sequence_maxsz + \
571 encode_putfh_maxsz + \
572 encode_savefh_maxsz + \
573 encode_create_maxsz + \
574 encode_getfh_maxsz + \
575 encode_getattr_maxsz + \
576 encode_restorefh_maxsz + \
577 encode_getattr_maxsz)
578 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
579 decode_sequence_maxsz + \
580 decode_putfh_maxsz + \
581 decode_savefh_maxsz + \
582 decode_create_maxsz + \
583 decode_getfh_maxsz + \
584 decode_getattr_maxsz + \
585 decode_restorefh_maxsz + \
586 decode_getattr_maxsz)
587 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
588 encode_sequence_maxsz + \
589 encode_putfh_maxsz + \
590 encode_getattr_maxsz)
591 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
592 decode_sequence_maxsz + \
593 decode_putfh_maxsz + \
594 decode_getattr_maxsz)
595 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
596 encode_sequence_maxsz + \
597 encode_putfh_maxsz + \
598 encode_statfs_maxsz)
599 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
600 decode_sequence_maxsz + \
601 decode_putfh_maxsz + \
602 decode_statfs_maxsz)
603 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
604 encode_sequence_maxsz + \
605 encode_putfh_maxsz + \
606 encode_getattr_maxsz)
607 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
608 decode_sequence_maxsz + \
609 decode_putfh_maxsz + \
610 decode_getattr_maxsz)
611 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
612 encode_sequence_maxsz + \
613 encode_putfh_maxsz + \
614 encode_delegreturn_maxsz + \
615 encode_getattr_maxsz)
616 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
617 decode_sequence_maxsz + \
618 decode_delegreturn_maxsz + \
619 decode_getattr_maxsz)
620 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
621 encode_sequence_maxsz + \
622 encode_putfh_maxsz + \
623 encode_getacl_maxsz)
624 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
625 decode_sequence_maxsz + \
626 decode_putfh_maxsz + \
627 decode_getacl_maxsz)
628 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
629 encode_sequence_maxsz + \
630 encode_putfh_maxsz + \
631 encode_setacl_maxsz)
632 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
633 decode_sequence_maxsz + \
634 decode_putfh_maxsz + \
635 decode_setacl_maxsz)
636 #define NFS4_enc_fs_locations_sz \
637 (compound_encode_hdr_maxsz + \
638 encode_sequence_maxsz + \
639 encode_putfh_maxsz + \
640 encode_lookup_maxsz + \
641 encode_fs_locations_maxsz)
642 #define NFS4_dec_fs_locations_sz \
643 (compound_decode_hdr_maxsz + \
644 decode_sequence_maxsz + \
645 decode_putfh_maxsz + \
646 decode_lookup_maxsz + \
647 decode_fs_locations_maxsz)
648 #if defined(CONFIG_NFS_V4_1)
649 #define NFS4_enc_exchange_id_sz \
650 (compound_encode_hdr_maxsz + \
651 encode_exchange_id_maxsz)
652 #define NFS4_dec_exchange_id_sz \
653 (compound_decode_hdr_maxsz + \
654 decode_exchange_id_maxsz)
655 #define NFS4_enc_create_session_sz \
656 (compound_encode_hdr_maxsz + \
657 encode_create_session_maxsz)
658 #define NFS4_dec_create_session_sz \
659 (compound_decode_hdr_maxsz + \
660 decode_create_session_maxsz)
661 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
662 encode_destroy_session_maxsz)
663 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
664 decode_destroy_session_maxsz)
665 #define NFS4_enc_sequence_sz \
666 (compound_decode_hdr_maxsz + \
667 encode_sequence_maxsz)
668 #define NFS4_dec_sequence_sz \
669 (compound_decode_hdr_maxsz + \
670 decode_sequence_maxsz)
671 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
672 encode_sequence_maxsz + \
673 encode_putrootfh_maxsz + \
674 encode_fsinfo_maxsz)
675 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putrootfh_maxsz + \
678 decode_fsinfo_maxsz)
679 #endif /* CONFIG_NFS_V4_1 */
680
681 static const umode_t nfs_type2fmt[] = {
682 [NF4BAD] = 0,
683 [NF4REG] = S_IFREG,
684 [NF4DIR] = S_IFDIR,
685 [NF4BLK] = S_IFBLK,
686 [NF4CHR] = S_IFCHR,
687 [NF4LNK] = S_IFLNK,
688 [NF4SOCK] = S_IFSOCK,
689 [NF4FIFO] = S_IFIFO,
690 [NF4ATTRDIR] = 0,
691 [NF4NAMEDATTR] = 0,
692 };
693
694 struct compound_hdr {
695 int32_t status;
696 uint32_t nops;
697 __be32 * nops_p;
698 uint32_t taglen;
699 char * tag;
700 uint32_t replen; /* expected reply words */
701 u32 minorversion;
702 };
703
704 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
705 {
706 __be32 *p = xdr_reserve_space(xdr, nbytes);
707 BUG_ON(!p);
708 return p;
709 }
710
711 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
712 {
713 __be32 *p;
714
715 p = xdr_reserve_space(xdr, 4 + len);
716 BUG_ON(p == NULL);
717 xdr_encode_opaque(p, str, len);
718 }
719
720 static void encode_compound_hdr(struct xdr_stream *xdr,
721 struct rpc_rqst *req,
722 struct compound_hdr *hdr)
723 {
724 __be32 *p;
725 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
726
727 /* initialize running count of expected bytes in reply.
728 * NOTE: the replied tag SHOULD be the same is the one sent,
729 * but this is not required as a MUST for the server to do so. */
730 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
731
732 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
733 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
734 p = reserve_space(xdr, 4 + hdr->taglen + 8);
735 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
736 *p++ = cpu_to_be32(hdr->minorversion);
737 hdr->nops_p = p;
738 *p = cpu_to_be32(hdr->nops);
739 }
740
741 static void encode_nops(struct compound_hdr *hdr)
742 {
743 BUG_ON(hdr->nops > NFS4_MAX_OPS);
744 *hdr->nops_p = htonl(hdr->nops);
745 }
746
747 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
748 {
749 __be32 *p;
750
751 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
752 BUG_ON(p == NULL);
753 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
754 }
755
756 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
757 {
758 char owner_name[IDMAP_NAMESZ];
759 char owner_group[IDMAP_NAMESZ];
760 int owner_namelen = 0;
761 int owner_grouplen = 0;
762 __be32 *p;
763 __be32 *q;
764 int len;
765 uint32_t bmval0 = 0;
766 uint32_t bmval1 = 0;
767
768 /*
769 * We reserve enough space to write the entire attribute buffer at once.
770 * In the worst-case, this would be
771 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
772 * = 36 bytes, plus any contribution from variable-length fields
773 * such as owner/group.
774 */
775 len = 16;
776
777 /* Sigh */
778 if (iap->ia_valid & ATTR_SIZE)
779 len += 8;
780 if (iap->ia_valid & ATTR_MODE)
781 len += 4;
782 if (iap->ia_valid & ATTR_UID) {
783 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
784 if (owner_namelen < 0) {
785 dprintk("nfs: couldn't resolve uid %d to string\n",
786 iap->ia_uid);
787 /* XXX */
788 strcpy(owner_name, "nobody");
789 owner_namelen = sizeof("nobody") - 1;
790 /* goto out; */
791 }
792 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
793 }
794 if (iap->ia_valid & ATTR_GID) {
795 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
796 if (owner_grouplen < 0) {
797 dprintk("nfs: couldn't resolve gid %d to string\n",
798 iap->ia_gid);
799 strcpy(owner_group, "nobody");
800 owner_grouplen = sizeof("nobody") - 1;
801 /* goto out; */
802 }
803 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
804 }
805 if (iap->ia_valid & ATTR_ATIME_SET)
806 len += 16;
807 else if (iap->ia_valid & ATTR_ATIME)
808 len += 4;
809 if (iap->ia_valid & ATTR_MTIME_SET)
810 len += 16;
811 else if (iap->ia_valid & ATTR_MTIME)
812 len += 4;
813 p = reserve_space(xdr, len);
814
815 /*
816 * We write the bitmap length now, but leave the bitmap and the attribute
817 * buffer length to be backfilled at the end of this routine.
818 */
819 *p++ = cpu_to_be32(2);
820 q = p;
821 p += 3;
822
823 if (iap->ia_valid & ATTR_SIZE) {
824 bmval0 |= FATTR4_WORD0_SIZE;
825 p = xdr_encode_hyper(p, iap->ia_size);
826 }
827 if (iap->ia_valid & ATTR_MODE) {
828 bmval1 |= FATTR4_WORD1_MODE;
829 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
830 }
831 if (iap->ia_valid & ATTR_UID) {
832 bmval1 |= FATTR4_WORD1_OWNER;
833 p = xdr_encode_opaque(p, owner_name, owner_namelen);
834 }
835 if (iap->ia_valid & ATTR_GID) {
836 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
837 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
838 }
839 if (iap->ia_valid & ATTR_ATIME_SET) {
840 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
841 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
842 *p++ = cpu_to_be32(0);
843 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
844 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
845 }
846 else if (iap->ia_valid & ATTR_ATIME) {
847 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
848 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
849 }
850 if (iap->ia_valid & ATTR_MTIME_SET) {
851 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
852 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
853 *p++ = cpu_to_be32(0);
854 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
855 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
856 }
857 else if (iap->ia_valid & ATTR_MTIME) {
858 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
859 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
860 }
861
862 /*
863 * Now we backfill the bitmap and the attribute buffer length.
864 */
865 if (len != ((char *)p - (char *)q) + 4) {
866 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
867 len, ((char *)p - (char *)q) + 4);
868 BUG();
869 }
870 len = (char *)p - (char *)q - 12;
871 *q++ = htonl(bmval0);
872 *q++ = htonl(bmval1);
873 *q = htonl(len);
874
875 /* out: */
876 }
877
878 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
879 {
880 __be32 *p;
881
882 p = reserve_space(xdr, 8);
883 *p++ = cpu_to_be32(OP_ACCESS);
884 *p = cpu_to_be32(access);
885 hdr->nops++;
886 hdr->replen += decode_access_maxsz;
887 }
888
889 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
890 {
891 __be32 *p;
892
893 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
894 *p++ = cpu_to_be32(OP_CLOSE);
895 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
896 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
897 hdr->nops++;
898 hdr->replen += decode_close_maxsz;
899 }
900
901 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
902 {
903 __be32 *p;
904
905 p = reserve_space(xdr, 16);
906 *p++ = cpu_to_be32(OP_COMMIT);
907 p = xdr_encode_hyper(p, args->offset);
908 *p = cpu_to_be32(args->count);
909 hdr->nops++;
910 hdr->replen += decode_commit_maxsz;
911 }
912
913 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
914 {
915 __be32 *p;
916
917 p = reserve_space(xdr, 8);
918 *p++ = cpu_to_be32(OP_CREATE);
919 *p = cpu_to_be32(create->ftype);
920
921 switch (create->ftype) {
922 case NF4LNK:
923 p = reserve_space(xdr, 4);
924 *p = cpu_to_be32(create->u.symlink.len);
925 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
926 break;
927
928 case NF4BLK: case NF4CHR:
929 p = reserve_space(xdr, 8);
930 *p++ = cpu_to_be32(create->u.device.specdata1);
931 *p = cpu_to_be32(create->u.device.specdata2);
932 break;
933
934 default:
935 break;
936 }
937
938 encode_string(xdr, create->name->len, create->name->name);
939 hdr->nops++;
940 hdr->replen += decode_create_maxsz;
941
942 encode_attrs(xdr, create->attrs, create->server);
943 }
944
945 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
946 {
947 __be32 *p;
948
949 p = reserve_space(xdr, 12);
950 *p++ = cpu_to_be32(OP_GETATTR);
951 *p++ = cpu_to_be32(1);
952 *p = cpu_to_be32(bitmap);
953 hdr->nops++;
954 hdr->replen += decode_getattr_maxsz;
955 }
956
957 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
958 {
959 __be32 *p;
960
961 p = reserve_space(xdr, 16);
962 *p++ = cpu_to_be32(OP_GETATTR);
963 *p++ = cpu_to_be32(2);
964 *p++ = cpu_to_be32(bm0);
965 *p = cpu_to_be32(bm1);
966 hdr->nops++;
967 hdr->replen += decode_getattr_maxsz;
968 }
969
970 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
971 {
972 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
973 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
974 }
975
976 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
977 {
978 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
979 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
980 }
981
982 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
983 {
984 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
985 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
986 }
987
988 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
989 {
990 __be32 *p;
991
992 p = reserve_space(xdr, 4);
993 *p = cpu_to_be32(OP_GETFH);
994 hdr->nops++;
995 hdr->replen += decode_getfh_maxsz;
996 }
997
998 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
999 {
1000 __be32 *p;
1001
1002 p = reserve_space(xdr, 8 + name->len);
1003 *p++ = cpu_to_be32(OP_LINK);
1004 xdr_encode_opaque(p, name->name, name->len);
1005 hdr->nops++;
1006 hdr->replen += decode_link_maxsz;
1007 }
1008
1009 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1010 {
1011 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1012 return block ? NFS4_READW_LT : NFS4_READ_LT;
1013 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1014 }
1015
1016 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1017 {
1018 if (fl->fl_end == OFFSET_MAX)
1019 return ~(uint64_t)0;
1020 return fl->fl_end - fl->fl_start + 1;
1021 }
1022
1023 /*
1024 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1025 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1026 */
1027 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1028 {
1029 __be32 *p;
1030
1031 p = reserve_space(xdr, 32);
1032 *p++ = cpu_to_be32(OP_LOCK);
1033 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1034 *p++ = cpu_to_be32(args->reclaim);
1035 p = xdr_encode_hyper(p, args->fl->fl_start);
1036 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1037 *p = cpu_to_be32(args->new_lock_owner);
1038 if (args->new_lock_owner){
1039 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1040 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1041 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1042 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1043 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1044 *p++ = cpu_to_be32(16);
1045 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1046 xdr_encode_hyper(p, args->lock_owner.id);
1047 }
1048 else {
1049 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1050 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1051 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1052 }
1053 hdr->nops++;
1054 hdr->replen += decode_lock_maxsz;
1055 }
1056
1057 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1058 {
1059 __be32 *p;
1060
1061 p = reserve_space(xdr, 52);
1062 *p++ = cpu_to_be32(OP_LOCKT);
1063 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1064 p = xdr_encode_hyper(p, args->fl->fl_start);
1065 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1066 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1067 *p++ = cpu_to_be32(16);
1068 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1069 xdr_encode_hyper(p, args->lock_owner.id);
1070 hdr->nops++;
1071 hdr->replen += decode_lockt_maxsz;
1072 }
1073
1074 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1075 {
1076 __be32 *p;
1077
1078 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1079 *p++ = cpu_to_be32(OP_LOCKU);
1080 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1081 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1082 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1083 p = xdr_encode_hyper(p, args->fl->fl_start);
1084 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1085 hdr->nops++;
1086 hdr->replen += decode_locku_maxsz;
1087 }
1088
1089 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1090 {
1091 int len = name->len;
1092 __be32 *p;
1093
1094 p = reserve_space(xdr, 8 + len);
1095 *p++ = cpu_to_be32(OP_LOOKUP);
1096 xdr_encode_opaque(p, name->name, len);
1097 hdr->nops++;
1098 hdr->replen += decode_lookup_maxsz;
1099 }
1100
1101 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1102 {
1103 __be32 *p;
1104
1105 p = reserve_space(xdr, 8);
1106 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1107 case FMODE_READ:
1108 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1109 break;
1110 case FMODE_WRITE:
1111 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1112 break;
1113 case FMODE_READ|FMODE_WRITE:
1114 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1115 break;
1116 default:
1117 *p++ = cpu_to_be32(0);
1118 }
1119 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1120 }
1121
1122 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1123 {
1124 __be32 *p;
1125 /*
1126 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1127 * owner 4 = 32
1128 */
1129 p = reserve_space(xdr, 8);
1130 *p++ = cpu_to_be32(OP_OPEN);
1131 *p = cpu_to_be32(arg->seqid->sequence->counter);
1132 encode_share_access(xdr, arg->fmode);
1133 p = reserve_space(xdr, 28);
1134 p = xdr_encode_hyper(p, arg->clientid);
1135 *p++ = cpu_to_be32(16);
1136 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1137 xdr_encode_hyper(p, arg->id);
1138 }
1139
1140 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1141 {
1142 __be32 *p;
1143
1144 p = reserve_space(xdr, 4);
1145 switch(arg->open_flags & O_EXCL) {
1146 case 0:
1147 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1148 encode_attrs(xdr, arg->u.attrs, arg->server);
1149 break;
1150 default:
1151 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1152 encode_nfs4_verifier(xdr, &arg->u.verifier);
1153 }
1154 }
1155
1156 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1157 {
1158 __be32 *p;
1159
1160 p = reserve_space(xdr, 4);
1161 switch (arg->open_flags & O_CREAT) {
1162 case 0:
1163 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1164 break;
1165 default:
1166 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1167 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1168 encode_createmode(xdr, arg);
1169 }
1170 }
1171
1172 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1173 {
1174 __be32 *p;
1175
1176 p = reserve_space(xdr, 4);
1177 switch (delegation_type) {
1178 case 0:
1179 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1180 break;
1181 case FMODE_READ:
1182 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1183 break;
1184 case FMODE_WRITE|FMODE_READ:
1185 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1186 break;
1187 default:
1188 BUG();
1189 }
1190 }
1191
1192 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1193 {
1194 __be32 *p;
1195
1196 p = reserve_space(xdr, 4);
1197 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1198 encode_string(xdr, name->len, name->name);
1199 }
1200
1201 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1202 {
1203 __be32 *p;
1204
1205 p = reserve_space(xdr, 4);
1206 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1207 encode_delegation_type(xdr, type);
1208 }
1209
1210 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1211 {
1212 __be32 *p;
1213
1214 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1215 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1216 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1217 encode_string(xdr, name->len, name->name);
1218 }
1219
1220 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1221 {
1222 encode_openhdr(xdr, arg);
1223 encode_opentype(xdr, arg);
1224 switch (arg->claim) {
1225 case NFS4_OPEN_CLAIM_NULL:
1226 encode_claim_null(xdr, arg->name);
1227 break;
1228 case NFS4_OPEN_CLAIM_PREVIOUS:
1229 encode_claim_previous(xdr, arg->u.delegation_type);
1230 break;
1231 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1232 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1233 break;
1234 default:
1235 BUG();
1236 }
1237 hdr->nops++;
1238 hdr->replen += decode_open_maxsz;
1239 }
1240
1241 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1242 {
1243 __be32 *p;
1244
1245 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1246 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1247 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1248 *p = cpu_to_be32(arg->seqid->sequence->counter);
1249 hdr->nops++;
1250 hdr->replen += decode_open_confirm_maxsz;
1251 }
1252
1253 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1254 {
1255 __be32 *p;
1256
1257 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1258 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1259 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1260 *p = cpu_to_be32(arg->seqid->sequence->counter);
1261 encode_share_access(xdr, arg->fmode);
1262 hdr->nops++;
1263 hdr->replen += decode_open_downgrade_maxsz;
1264 }
1265
1266 static void
1267 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1268 {
1269 int len = fh->size;
1270 __be32 *p;
1271
1272 p = reserve_space(xdr, 8 + len);
1273 *p++ = cpu_to_be32(OP_PUTFH);
1274 xdr_encode_opaque(p, fh->data, len);
1275 hdr->nops++;
1276 hdr->replen += decode_putfh_maxsz;
1277 }
1278
1279 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1280 {
1281 __be32 *p;
1282
1283 p = reserve_space(xdr, 4);
1284 *p = cpu_to_be32(OP_PUTROOTFH);
1285 hdr->nops++;
1286 hdr->replen += decode_putrootfh_maxsz;
1287 }
1288
1289 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1290 {
1291 nfs4_stateid stateid;
1292 __be32 *p;
1293
1294 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1295 if (ctx->state != NULL) {
1296 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1297 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1298 } else
1299 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1300 }
1301
1302 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1303 {
1304 __be32 *p;
1305
1306 p = reserve_space(xdr, 4);
1307 *p = cpu_to_be32(OP_READ);
1308
1309 encode_stateid(xdr, args->context);
1310
1311 p = reserve_space(xdr, 12);
1312 p = xdr_encode_hyper(p, args->offset);
1313 *p = cpu_to_be32(args->count);
1314 hdr->nops++;
1315 hdr->replen += decode_read_maxsz;
1316 }
1317
1318 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1319 {
1320 uint32_t attrs[2] = {
1321 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1322 FATTR4_WORD1_MOUNTED_ON_FILEID,
1323 };
1324 __be32 *p;
1325
1326 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1327 *p++ = cpu_to_be32(OP_READDIR);
1328 p = xdr_encode_hyper(p, readdir->cookie);
1329 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1330 *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
1331 *p++ = cpu_to_be32(readdir->count);
1332 *p++ = cpu_to_be32(2);
1333 /* Switch to mounted_on_fileid if the server supports it */
1334 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1335 attrs[0] &= ~FATTR4_WORD0_FILEID;
1336 else
1337 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1338 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1339 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1340 hdr->nops++;
1341 hdr->replen += decode_readdir_maxsz;
1342 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1343 __func__,
1344 (unsigned long long)readdir->cookie,
1345 ((u32 *)readdir->verifier.data)[0],
1346 ((u32 *)readdir->verifier.data)[1],
1347 attrs[0] & readdir->bitmask[0],
1348 attrs[1] & readdir->bitmask[1]);
1349 }
1350
1351 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1352 {
1353 __be32 *p;
1354
1355 p = reserve_space(xdr, 4);
1356 *p = cpu_to_be32(OP_READLINK);
1357 hdr->nops++;
1358 hdr->replen += decode_readlink_maxsz;
1359 }
1360
1361 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1362 {
1363 __be32 *p;
1364
1365 p = reserve_space(xdr, 8 + name->len);
1366 *p++ = cpu_to_be32(OP_REMOVE);
1367 xdr_encode_opaque(p, name->name, name->len);
1368 hdr->nops++;
1369 hdr->replen += decode_remove_maxsz;
1370 }
1371
1372 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1373 {
1374 __be32 *p;
1375
1376 p = reserve_space(xdr, 4);
1377 *p = cpu_to_be32(OP_RENAME);
1378 encode_string(xdr, oldname->len, oldname->name);
1379 encode_string(xdr, newname->len, newname->name);
1380 hdr->nops++;
1381 hdr->replen += decode_rename_maxsz;
1382 }
1383
1384 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1385 {
1386 __be32 *p;
1387
1388 p = reserve_space(xdr, 12);
1389 *p++ = cpu_to_be32(OP_RENEW);
1390 xdr_encode_hyper(p, client_stateid->cl_clientid);
1391 hdr->nops++;
1392 hdr->replen += decode_renew_maxsz;
1393 }
1394
1395 static void
1396 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1397 {
1398 __be32 *p;
1399
1400 p = reserve_space(xdr, 4);
1401 *p = cpu_to_be32(OP_RESTOREFH);
1402 hdr->nops++;
1403 hdr->replen += decode_restorefh_maxsz;
1404 }
1405
1406 static int
1407 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1408 {
1409 __be32 *p;
1410
1411 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1412 *p++ = cpu_to_be32(OP_SETATTR);
1413 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1414 p = reserve_space(xdr, 2*4);
1415 *p++ = cpu_to_be32(1);
1416 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1417 if (arg->acl_len % 4)
1418 return -EINVAL;
1419 p = reserve_space(xdr, 4);
1420 *p = cpu_to_be32(arg->acl_len);
1421 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1422 hdr->nops++;
1423 hdr->replen += decode_setacl_maxsz;
1424 return 0;
1425 }
1426
1427 static void
1428 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1429 {
1430 __be32 *p;
1431
1432 p = reserve_space(xdr, 4);
1433 *p = cpu_to_be32(OP_SAVEFH);
1434 hdr->nops++;
1435 hdr->replen += decode_savefh_maxsz;
1436 }
1437
1438 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1439 {
1440 __be32 *p;
1441
1442 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1443 *p++ = cpu_to_be32(OP_SETATTR);
1444 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1445 hdr->nops++;
1446 hdr->replen += decode_setattr_maxsz;
1447 encode_attrs(xdr, arg->iap, server);
1448 }
1449
1450 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1451 {
1452 __be32 *p;
1453
1454 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1455 *p++ = cpu_to_be32(OP_SETCLIENTID);
1456 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1457
1458 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1459 p = reserve_space(xdr, 4);
1460 *p = cpu_to_be32(setclientid->sc_prog);
1461 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1462 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1463 p = reserve_space(xdr, 4);
1464 *p = cpu_to_be32(setclientid->sc_cb_ident);
1465 hdr->nops++;
1466 hdr->replen += decode_setclientid_maxsz;
1467 }
1468
1469 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1470 {
1471 __be32 *p;
1472
1473 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1474 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1475 p = xdr_encode_hyper(p, client_state->cl_clientid);
1476 xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1477 hdr->nops++;
1478 hdr->replen += decode_setclientid_confirm_maxsz;
1479 }
1480
1481 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1482 {
1483 __be32 *p;
1484
1485 p = reserve_space(xdr, 4);
1486 *p = cpu_to_be32(OP_WRITE);
1487
1488 encode_stateid(xdr, args->context);
1489
1490 p = reserve_space(xdr, 16);
1491 p = xdr_encode_hyper(p, args->offset);
1492 *p++ = cpu_to_be32(args->stable);
1493 *p = cpu_to_be32(args->count);
1494
1495 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1496 hdr->nops++;
1497 hdr->replen += decode_write_maxsz;
1498 }
1499
1500 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1501 {
1502 __be32 *p;
1503
1504 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1505
1506 *p++ = cpu_to_be32(OP_DELEGRETURN);
1507 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1508 hdr->nops++;
1509 hdr->replen += decode_delegreturn_maxsz;
1510 }
1511
1512 #if defined(CONFIG_NFS_V4_1)
1513 /* NFSv4.1 operations */
1514 static void encode_exchange_id(struct xdr_stream *xdr,
1515 struct nfs41_exchange_id_args *args,
1516 struct compound_hdr *hdr)
1517 {
1518 __be32 *p;
1519
1520 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1521 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1522 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1523
1524 encode_string(xdr, args->id_len, args->id);
1525
1526 p = reserve_space(xdr, 12);
1527 *p++ = cpu_to_be32(args->flags);
1528 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1529 *p = cpu_to_be32(0); /* zero length implementation id array */
1530 hdr->nops++;
1531 hdr->replen += decode_exchange_id_maxsz;
1532 }
1533
1534 static void encode_create_session(struct xdr_stream *xdr,
1535 struct nfs41_create_session_args *args,
1536 struct compound_hdr *hdr)
1537 {
1538 __be32 *p;
1539 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1540 uint32_t len;
1541 struct nfs_client *clp = args->client;
1542
1543 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1544 clp->cl_ipaddr);
1545
1546 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1547 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1548 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1549 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1550 *p++ = cpu_to_be32(args->flags); /*flags */
1551
1552 /* Fore Channel */
1553 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1554 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1555 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1556 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1557 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1558 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1559 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1560
1561 /* Back Channel */
1562 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1563 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1564 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1565 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1566 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1567 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1568 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1569
1570 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1571 *p++ = cpu_to_be32(1);
1572 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1573
1574 /* authsys_parms rfc1831 */
1575 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1576 p = xdr_encode_opaque(p, machine_name, len);
1577 *p++ = cpu_to_be32(0); /* UID */
1578 *p++ = cpu_to_be32(0); /* GID */
1579 *p = cpu_to_be32(0); /* No more gids */
1580 hdr->nops++;
1581 hdr->replen += decode_create_session_maxsz;
1582 }
1583
1584 static void encode_destroy_session(struct xdr_stream *xdr,
1585 struct nfs4_session *session,
1586 struct compound_hdr *hdr)
1587 {
1588 __be32 *p;
1589 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1590 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1591 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1592 hdr->nops++;
1593 hdr->replen += decode_destroy_session_maxsz;
1594 }
1595 #endif /* CONFIG_NFS_V4_1 */
1596
1597 static void encode_sequence(struct xdr_stream *xdr,
1598 const struct nfs4_sequence_args *args,
1599 struct compound_hdr *hdr)
1600 {
1601 #if defined(CONFIG_NFS_V4_1)
1602 struct nfs4_session *session = args->sa_session;
1603 struct nfs4_slot_table *tp;
1604 struct nfs4_slot *slot;
1605 __be32 *p;
1606
1607 if (!session)
1608 return;
1609
1610 tp = &session->fc_slot_table;
1611
1612 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1613 slot = tp->slots + args->sa_slotid;
1614
1615 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1616 *p++ = cpu_to_be32(OP_SEQUENCE);
1617
1618 /*
1619 * Sessionid + seqid + slotid + max slotid + cache_this
1620 */
1621 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1622 "max_slotid=%d cache_this=%d\n",
1623 __func__,
1624 ((u32 *)session->sess_id.data)[0],
1625 ((u32 *)session->sess_id.data)[1],
1626 ((u32 *)session->sess_id.data)[2],
1627 ((u32 *)session->sess_id.data)[3],
1628 slot->seq_nr, args->sa_slotid,
1629 tp->highest_used_slotid, args->sa_cache_this);
1630 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1631 *p++ = cpu_to_be32(slot->seq_nr);
1632 *p++ = cpu_to_be32(args->sa_slotid);
1633 *p++ = cpu_to_be32(tp->highest_used_slotid);
1634 *p = cpu_to_be32(args->sa_cache_this);
1635 hdr->nops++;
1636 hdr->replen += decode_sequence_maxsz;
1637 #endif /* CONFIG_NFS_V4_1 */
1638 }
1639
1640 /*
1641 * END OF "GENERIC" ENCODE ROUTINES.
1642 */
1643
1644 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1645 {
1646 #if defined(CONFIG_NFS_V4_1)
1647 if (args->sa_session)
1648 return args->sa_session->clp->cl_minorversion;
1649 #endif /* CONFIG_NFS_V4_1 */
1650 return 0;
1651 }
1652
1653 /*
1654 * Encode an ACCESS request
1655 */
1656 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1657 {
1658 struct xdr_stream xdr;
1659 struct compound_hdr hdr = {
1660 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1661 };
1662
1663 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664 encode_compound_hdr(&xdr, req, &hdr);
1665 encode_sequence(&xdr, &args->seq_args, &hdr);
1666 encode_putfh(&xdr, args->fh, &hdr);
1667 encode_access(&xdr, args->access, &hdr);
1668 encode_getfattr(&xdr, args->bitmask, &hdr);
1669 encode_nops(&hdr);
1670 return 0;
1671 }
1672
1673 /*
1674 * Encode LOOKUP request
1675 */
1676 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1677 {
1678 struct xdr_stream xdr;
1679 struct compound_hdr hdr = {
1680 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1681 };
1682
1683 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684 encode_compound_hdr(&xdr, req, &hdr);
1685 encode_sequence(&xdr, &args->seq_args, &hdr);
1686 encode_putfh(&xdr, args->dir_fh, &hdr);
1687 encode_lookup(&xdr, args->name, &hdr);
1688 encode_getfh(&xdr, &hdr);
1689 encode_getfattr(&xdr, args->bitmask, &hdr);
1690 encode_nops(&hdr);
1691 return 0;
1692 }
1693
1694 /*
1695 * Encode LOOKUP_ROOT request
1696 */
1697 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1698 {
1699 struct xdr_stream xdr;
1700 struct compound_hdr hdr = {
1701 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1702 };
1703
1704 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1705 encode_compound_hdr(&xdr, req, &hdr);
1706 encode_sequence(&xdr, &args->seq_args, &hdr);
1707 encode_putrootfh(&xdr, &hdr);
1708 encode_getfh(&xdr, &hdr);
1709 encode_getfattr(&xdr, args->bitmask, &hdr);
1710 encode_nops(&hdr);
1711 return 0;
1712 }
1713
1714 /*
1715 * Encode REMOVE request
1716 */
1717 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1718 {
1719 struct xdr_stream xdr;
1720 struct compound_hdr hdr = {
1721 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1722 };
1723
1724 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1725 encode_compound_hdr(&xdr, req, &hdr);
1726 encode_sequence(&xdr, &args->seq_args, &hdr);
1727 encode_putfh(&xdr, args->fh, &hdr);
1728 encode_remove(&xdr, &args->name, &hdr);
1729 encode_getfattr(&xdr, args->bitmask, &hdr);
1730 encode_nops(&hdr);
1731 return 0;
1732 }
1733
1734 /*
1735 * Encode RENAME request
1736 */
1737 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1738 {
1739 struct xdr_stream xdr;
1740 struct compound_hdr hdr = {
1741 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1742 };
1743
1744 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1745 encode_compound_hdr(&xdr, req, &hdr);
1746 encode_sequence(&xdr, &args->seq_args, &hdr);
1747 encode_putfh(&xdr, args->old_dir, &hdr);
1748 encode_savefh(&xdr, &hdr);
1749 encode_putfh(&xdr, args->new_dir, &hdr);
1750 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1751 encode_getfattr(&xdr, args->bitmask, &hdr);
1752 encode_restorefh(&xdr, &hdr);
1753 encode_getfattr(&xdr, args->bitmask, &hdr);
1754 encode_nops(&hdr);
1755 return 0;
1756 }
1757
1758 /*
1759 * Encode LINK request
1760 */
1761 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1762 {
1763 struct xdr_stream xdr;
1764 struct compound_hdr hdr = {
1765 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1766 };
1767
1768 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1769 encode_compound_hdr(&xdr, req, &hdr);
1770 encode_sequence(&xdr, &args->seq_args, &hdr);
1771 encode_putfh(&xdr, args->fh, &hdr);
1772 encode_savefh(&xdr, &hdr);
1773 encode_putfh(&xdr, args->dir_fh, &hdr);
1774 encode_link(&xdr, args->name, &hdr);
1775 encode_getfattr(&xdr, args->bitmask, &hdr);
1776 encode_restorefh(&xdr, &hdr);
1777 encode_getfattr(&xdr, args->bitmask, &hdr);
1778 encode_nops(&hdr);
1779 return 0;
1780 }
1781
1782 /*
1783 * Encode CREATE request
1784 */
1785 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1786 {
1787 struct xdr_stream xdr;
1788 struct compound_hdr hdr = {
1789 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1790 };
1791
1792 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793 encode_compound_hdr(&xdr, req, &hdr);
1794 encode_sequence(&xdr, &args->seq_args, &hdr);
1795 encode_putfh(&xdr, args->dir_fh, &hdr);
1796 encode_savefh(&xdr, &hdr);
1797 encode_create(&xdr, args, &hdr);
1798 encode_getfh(&xdr, &hdr);
1799 encode_getfattr(&xdr, args->bitmask, &hdr);
1800 encode_restorefh(&xdr, &hdr);
1801 encode_getfattr(&xdr, args->bitmask, &hdr);
1802 encode_nops(&hdr);
1803 return 0;
1804 }
1805
1806 /*
1807 * Encode SYMLINK request
1808 */
1809 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1810 {
1811 return nfs4_xdr_enc_create(req, p, args);
1812 }
1813
1814 /*
1815 * Encode GETATTR request
1816 */
1817 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1818 {
1819 struct xdr_stream xdr;
1820 struct compound_hdr hdr = {
1821 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1822 };
1823
1824 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1825 encode_compound_hdr(&xdr, req, &hdr);
1826 encode_sequence(&xdr, &args->seq_args, &hdr);
1827 encode_putfh(&xdr, args->fh, &hdr);
1828 encode_getfattr(&xdr, args->bitmask, &hdr);
1829 encode_nops(&hdr);
1830 return 0;
1831 }
1832
1833 /*
1834 * Encode a CLOSE request
1835 */
1836 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1837 {
1838 struct xdr_stream xdr;
1839 struct compound_hdr hdr = {
1840 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1841 };
1842
1843 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844 encode_compound_hdr(&xdr, req, &hdr);
1845 encode_sequence(&xdr, &args->seq_args, &hdr);
1846 encode_putfh(&xdr, args->fh, &hdr);
1847 encode_close(&xdr, args, &hdr);
1848 encode_getfattr(&xdr, args->bitmask, &hdr);
1849 encode_nops(&hdr);
1850 return 0;
1851 }
1852
1853 /*
1854 * Encode an OPEN request
1855 */
1856 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1857 {
1858 struct xdr_stream xdr;
1859 struct compound_hdr hdr = {
1860 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1861 };
1862
1863 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1864 encode_compound_hdr(&xdr, req, &hdr);
1865 encode_sequence(&xdr, &args->seq_args, &hdr);
1866 encode_putfh(&xdr, args->fh, &hdr);
1867 encode_savefh(&xdr, &hdr);
1868 encode_open(&xdr, args, &hdr);
1869 encode_getfh(&xdr, &hdr);
1870 encode_getfattr(&xdr, args->bitmask, &hdr);
1871 encode_restorefh(&xdr, &hdr);
1872 encode_getfattr(&xdr, args->bitmask, &hdr);
1873 encode_nops(&hdr);
1874 return 0;
1875 }
1876
1877 /*
1878 * Encode an OPEN_CONFIRM request
1879 */
1880 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1881 {
1882 struct xdr_stream xdr;
1883 struct compound_hdr hdr = {
1884 .nops = 0,
1885 };
1886
1887 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1888 encode_compound_hdr(&xdr, req, &hdr);
1889 encode_putfh(&xdr, args->fh, &hdr);
1890 encode_open_confirm(&xdr, args, &hdr);
1891 encode_nops(&hdr);
1892 return 0;
1893 }
1894
1895 /*
1896 * Encode an OPEN request with no attributes.
1897 */
1898 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1899 {
1900 struct xdr_stream xdr;
1901 struct compound_hdr hdr = {
1902 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1903 };
1904
1905 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1906 encode_compound_hdr(&xdr, req, &hdr);
1907 encode_sequence(&xdr, &args->seq_args, &hdr);
1908 encode_putfh(&xdr, args->fh, &hdr);
1909 encode_open(&xdr, args, &hdr);
1910 encode_getfattr(&xdr, args->bitmask, &hdr);
1911 encode_nops(&hdr);
1912 return 0;
1913 }
1914
1915 /*
1916 * Encode an OPEN_DOWNGRADE request
1917 */
1918 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1919 {
1920 struct xdr_stream xdr;
1921 struct compound_hdr hdr = {
1922 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1923 };
1924
1925 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1926 encode_compound_hdr(&xdr, req, &hdr);
1927 encode_sequence(&xdr, &args->seq_args, &hdr);
1928 encode_putfh(&xdr, args->fh, &hdr);
1929 encode_open_downgrade(&xdr, args, &hdr);
1930 encode_getfattr(&xdr, args->bitmask, &hdr);
1931 encode_nops(&hdr);
1932 return 0;
1933 }
1934
1935 /*
1936 * Encode a LOCK request
1937 */
1938 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1939 {
1940 struct xdr_stream xdr;
1941 struct compound_hdr hdr = {
1942 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1943 };
1944
1945 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1946 encode_compound_hdr(&xdr, req, &hdr);
1947 encode_sequence(&xdr, &args->seq_args, &hdr);
1948 encode_putfh(&xdr, args->fh, &hdr);
1949 encode_lock(&xdr, args, &hdr);
1950 encode_nops(&hdr);
1951 return 0;
1952 }
1953
1954 /*
1955 * Encode a LOCKT request
1956 */
1957 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1958 {
1959 struct xdr_stream xdr;
1960 struct compound_hdr hdr = {
1961 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1962 };
1963
1964 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1965 encode_compound_hdr(&xdr, req, &hdr);
1966 encode_sequence(&xdr, &args->seq_args, &hdr);
1967 encode_putfh(&xdr, args->fh, &hdr);
1968 encode_lockt(&xdr, args, &hdr);
1969 encode_nops(&hdr);
1970 return 0;
1971 }
1972
1973 /*
1974 * Encode a LOCKU request
1975 */
1976 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1977 {
1978 struct xdr_stream xdr;
1979 struct compound_hdr hdr = {
1980 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1981 };
1982
1983 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1984 encode_compound_hdr(&xdr, req, &hdr);
1985 encode_sequence(&xdr, &args->seq_args, &hdr);
1986 encode_putfh(&xdr, args->fh, &hdr);
1987 encode_locku(&xdr, args, &hdr);
1988 encode_nops(&hdr);
1989 return 0;
1990 }
1991
1992 /*
1993 * Encode a READLINK request
1994 */
1995 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1996 {
1997 struct xdr_stream xdr;
1998 struct compound_hdr hdr = {
1999 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2000 };
2001
2002 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2003 encode_compound_hdr(&xdr, req, &hdr);
2004 encode_sequence(&xdr, &args->seq_args, &hdr);
2005 encode_putfh(&xdr, args->fh, &hdr);
2006 encode_readlink(&xdr, args, req, &hdr);
2007
2008 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2009 args->pgbase, args->pglen);
2010 encode_nops(&hdr);
2011 return 0;
2012 }
2013
2014 /*
2015 * Encode a READDIR request
2016 */
2017 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2018 {
2019 struct xdr_stream xdr;
2020 struct compound_hdr hdr = {
2021 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022 };
2023
2024 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2025 encode_compound_hdr(&xdr, req, &hdr);
2026 encode_sequence(&xdr, &args->seq_args, &hdr);
2027 encode_putfh(&xdr, args->fh, &hdr);
2028 encode_readdir(&xdr, args, req, &hdr);
2029
2030 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2031 args->pgbase, args->count);
2032 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2033 __func__, hdr.replen << 2, args->pages,
2034 args->pgbase, args->count);
2035 encode_nops(&hdr);
2036 return 0;
2037 }
2038
2039 /*
2040 * Encode a READ request
2041 */
2042 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2043 {
2044 struct xdr_stream xdr;
2045 struct compound_hdr hdr = {
2046 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2047 };
2048
2049 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2050 encode_compound_hdr(&xdr, req, &hdr);
2051 encode_sequence(&xdr, &args->seq_args, &hdr);
2052 encode_putfh(&xdr, args->fh, &hdr);
2053 encode_read(&xdr, args, &hdr);
2054
2055 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2056 args->pages, args->pgbase, args->count);
2057 req->rq_rcv_buf.flags |= XDRBUF_READ;
2058 encode_nops(&hdr);
2059 return 0;
2060 }
2061
2062 /*
2063 * Encode an SETATTR request
2064 */
2065 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2066 {
2067 struct xdr_stream xdr;
2068 struct compound_hdr hdr = {
2069 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070 };
2071
2072 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073 encode_compound_hdr(&xdr, req, &hdr);
2074 encode_sequence(&xdr, &args->seq_args, &hdr);
2075 encode_putfh(&xdr, args->fh, &hdr);
2076 encode_setattr(&xdr, args, args->server, &hdr);
2077 encode_getfattr(&xdr, args->bitmask, &hdr);
2078 encode_nops(&hdr);
2079 return 0;
2080 }
2081
2082 /*
2083 * Encode a GETACL request
2084 */
2085 static int
2086 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2087 struct nfs_getaclargs *args)
2088 {
2089 struct xdr_stream xdr;
2090 struct compound_hdr hdr = {
2091 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2092 };
2093 uint32_t replen;
2094
2095 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2096 encode_compound_hdr(&xdr, req, &hdr);
2097 encode_sequence(&xdr, &args->seq_args, &hdr);
2098 encode_putfh(&xdr, args->fh, &hdr);
2099 replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2100 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2101
2102 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2103 args->acl_pages, args->acl_pgbase, args->acl_len);
2104 encode_nops(&hdr);
2105 return 0;
2106 }
2107
2108 /*
2109 * Encode a WRITE request
2110 */
2111 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2112 {
2113 struct xdr_stream xdr;
2114 struct compound_hdr hdr = {
2115 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116 };
2117
2118 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2119 encode_compound_hdr(&xdr, req, &hdr);
2120 encode_sequence(&xdr, &args->seq_args, &hdr);
2121 encode_putfh(&xdr, args->fh, &hdr);
2122 encode_write(&xdr, args, &hdr);
2123 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2124 encode_getfattr(&xdr, args->bitmask, &hdr);
2125 encode_nops(&hdr);
2126 return 0;
2127 }
2128
2129 /*
2130 * a COMMIT request
2131 */
2132 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2133 {
2134 struct xdr_stream xdr;
2135 struct compound_hdr hdr = {
2136 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137 };
2138
2139 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140 encode_compound_hdr(&xdr, req, &hdr);
2141 encode_sequence(&xdr, &args->seq_args, &hdr);
2142 encode_putfh(&xdr, args->fh, &hdr);
2143 encode_commit(&xdr, args, &hdr);
2144 encode_getfattr(&xdr, args->bitmask, &hdr);
2145 encode_nops(&hdr);
2146 return 0;
2147 }
2148
2149 /*
2150 * FSINFO request
2151 */
2152 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2153 {
2154 struct xdr_stream xdr;
2155 struct compound_hdr hdr = {
2156 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157 };
2158
2159 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2160 encode_compound_hdr(&xdr, req, &hdr);
2161 encode_sequence(&xdr, &args->seq_args, &hdr);
2162 encode_putfh(&xdr, args->fh, &hdr);
2163 encode_fsinfo(&xdr, args->bitmask, &hdr);
2164 encode_nops(&hdr);
2165 return 0;
2166 }
2167
2168 /*
2169 * a PATHCONF request
2170 */
2171 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2172 {
2173 struct xdr_stream xdr;
2174 struct compound_hdr hdr = {
2175 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176 };
2177
2178 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2179 encode_compound_hdr(&xdr, req, &hdr);
2180 encode_sequence(&xdr, &args->seq_args, &hdr);
2181 encode_putfh(&xdr, args->fh, &hdr);
2182 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2183 &hdr);
2184 encode_nops(&hdr);
2185 return 0;
2186 }
2187
2188 /*
2189 * a STATFS request
2190 */
2191 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2192 {
2193 struct xdr_stream xdr;
2194 struct compound_hdr hdr = {
2195 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196 };
2197
2198 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2199 encode_compound_hdr(&xdr, req, &hdr);
2200 encode_sequence(&xdr, &args->seq_args, &hdr);
2201 encode_putfh(&xdr, args->fh, &hdr);
2202 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2203 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2204 encode_nops(&hdr);
2205 return 0;
2206 }
2207
2208 /*
2209 * GETATTR_BITMAP request
2210 */
2211 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2212 struct nfs4_server_caps_arg *args)
2213 {
2214 struct xdr_stream xdr;
2215 struct compound_hdr hdr = {
2216 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217 };
2218
2219 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2220 encode_compound_hdr(&xdr, req, &hdr);
2221 encode_sequence(&xdr, &args->seq_args, &hdr);
2222 encode_putfh(&xdr, args->fhandle, &hdr);
2223 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2224 FATTR4_WORD0_LINK_SUPPORT|
2225 FATTR4_WORD0_SYMLINK_SUPPORT|
2226 FATTR4_WORD0_ACLSUPPORT, &hdr);
2227 encode_nops(&hdr);
2228 return 0;
2229 }
2230
2231 /*
2232 * a RENEW request
2233 */
2234 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2235 {
2236 struct xdr_stream xdr;
2237 struct compound_hdr hdr = {
2238 .nops = 0,
2239 };
2240
2241 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2242 encode_compound_hdr(&xdr, req, &hdr);
2243 encode_renew(&xdr, clp, &hdr);
2244 encode_nops(&hdr);
2245 return 0;
2246 }
2247
2248 /*
2249 * a SETCLIENTID request
2250 */
2251 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2252 {
2253 struct xdr_stream xdr;
2254 struct compound_hdr hdr = {
2255 .nops = 0,
2256 };
2257
2258 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2259 encode_compound_hdr(&xdr, req, &hdr);
2260 encode_setclientid(&xdr, sc, &hdr);
2261 encode_nops(&hdr);
2262 return 0;
2263 }
2264
2265 /*
2266 * a SETCLIENTID_CONFIRM request
2267 */
2268 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2269 {
2270 struct xdr_stream xdr;
2271 struct compound_hdr hdr = {
2272 .nops = 0,
2273 };
2274 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2275
2276 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2277 encode_compound_hdr(&xdr, req, &hdr);
2278 encode_setclientid_confirm(&xdr, clp, &hdr);
2279 encode_putrootfh(&xdr, &hdr);
2280 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2281 encode_nops(&hdr);
2282 return 0;
2283 }
2284
2285 /*
2286 * DELEGRETURN request
2287 */
2288 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2289 {
2290 struct xdr_stream xdr;
2291 struct compound_hdr hdr = {
2292 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293 };
2294
2295 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2296 encode_compound_hdr(&xdr, req, &hdr);
2297 encode_sequence(&xdr, &args->seq_args, &hdr);
2298 encode_putfh(&xdr, args->fhandle, &hdr);
2299 encode_delegreturn(&xdr, args->stateid, &hdr);
2300 encode_getfattr(&xdr, args->bitmask, &hdr);
2301 encode_nops(&hdr);
2302 return 0;
2303 }
2304
2305 /*
2306 * Encode FS_LOCATIONS request
2307 */
2308 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2309 {
2310 struct xdr_stream xdr;
2311 struct compound_hdr hdr = {
2312 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313 };
2314 uint32_t replen;
2315
2316 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2317 encode_compound_hdr(&xdr, req, &hdr);
2318 encode_sequence(&xdr, &args->seq_args, &hdr);
2319 encode_putfh(&xdr, args->dir_fh, &hdr);
2320 encode_lookup(&xdr, args->name, &hdr);
2321 replen = hdr.replen; /* get the attribute into args->page */
2322 encode_fs_locations(&xdr, args->bitmask, &hdr);
2323
2324 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2325 0, PAGE_SIZE);
2326 encode_nops(&hdr);
2327 return 0;
2328 }
2329
2330 #if defined(CONFIG_NFS_V4_1)
2331 /*
2332 * EXCHANGE_ID request
2333 */
2334 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2335 struct nfs41_exchange_id_args *args)
2336 {
2337 struct xdr_stream xdr;
2338 struct compound_hdr hdr = {
2339 .minorversion = args->client->cl_minorversion,
2340 };
2341
2342 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2343 encode_compound_hdr(&xdr, req, &hdr);
2344 encode_exchange_id(&xdr, args, &hdr);
2345 encode_nops(&hdr);
2346 return 0;
2347 }
2348
2349 /*
2350 * a CREATE_SESSION request
2351 */
2352 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2353 struct nfs41_create_session_args *args)
2354 {
2355 struct xdr_stream xdr;
2356 struct compound_hdr hdr = {
2357 .minorversion = args->client->cl_minorversion,
2358 };
2359
2360 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2361 encode_compound_hdr(&xdr, req, &hdr);
2362 encode_create_session(&xdr, args, &hdr);
2363 encode_nops(&hdr);
2364 return 0;
2365 }
2366
2367 /*
2368 * a DESTROY_SESSION request
2369 */
2370 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2371 struct nfs4_session *session)
2372 {
2373 struct xdr_stream xdr;
2374 struct compound_hdr hdr = {
2375 .minorversion = session->clp->cl_minorversion,
2376 };
2377
2378 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2379 encode_compound_hdr(&xdr, req, &hdr);
2380 encode_destroy_session(&xdr, session, &hdr);
2381 encode_nops(&hdr);
2382 return 0;
2383 }
2384
2385 /*
2386 * a SEQUENCE request
2387 */
2388 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2389 struct nfs4_sequence_args *args)
2390 {
2391 struct xdr_stream xdr;
2392 struct compound_hdr hdr = {
2393 .minorversion = nfs4_xdr_minorversion(args),
2394 };
2395
2396 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2397 encode_compound_hdr(&xdr, req, &hdr);
2398 encode_sequence(&xdr, args, &hdr);
2399 encode_nops(&hdr);
2400 return 0;
2401 }
2402
2403 /*
2404 * a GET_LEASE_TIME request
2405 */
2406 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2407 struct nfs4_get_lease_time_args *args)
2408 {
2409 struct xdr_stream xdr;
2410 struct compound_hdr hdr = {
2411 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2412 };
2413 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2414
2415 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2416 encode_compound_hdr(&xdr, req, &hdr);
2417 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2418 encode_putrootfh(&xdr, &hdr);
2419 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2420 encode_nops(&hdr);
2421 return 0;
2422 }
2423 #endif /* CONFIG_NFS_V4_1 */
2424
2425 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2426 {
2427 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2428 "Remaining buffer length is %tu words.\n",
2429 func, xdr->end - xdr->p);
2430 }
2431
2432 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2433 {
2434 __be32 *p;
2435
2436 p = xdr_inline_decode(xdr, 4);
2437 if (unlikely(!p))
2438 goto out_overflow;
2439 *len = be32_to_cpup(p);
2440 p = xdr_inline_decode(xdr, *len);
2441 if (unlikely(!p))
2442 goto out_overflow;
2443 *string = (char *)p;
2444 return 0;
2445 out_overflow:
2446 print_overflow_msg(__func__, xdr);
2447 return -EIO;
2448 }
2449
2450 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2451 {
2452 __be32 *p;
2453
2454 p = xdr_inline_decode(xdr, 8);
2455 if (unlikely(!p))
2456 goto out_overflow;
2457 hdr->status = be32_to_cpup(p++);
2458 hdr->taglen = be32_to_cpup(p);
2459
2460 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2461 if (unlikely(!p))
2462 goto out_overflow;
2463 hdr->tag = (char *)p;
2464 p += XDR_QUADLEN(hdr->taglen);
2465 hdr->nops = be32_to_cpup(p);
2466 if (unlikely(hdr->nops < 1))
2467 return nfs4_stat_to_errno(hdr->status);
2468 return 0;
2469 out_overflow:
2470 print_overflow_msg(__func__, xdr);
2471 return -EIO;
2472 }
2473
2474 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2475 {
2476 __be32 *p;
2477 uint32_t opnum;
2478 int32_t nfserr;
2479
2480 p = xdr_inline_decode(xdr, 8);
2481 if (unlikely(!p))
2482 goto out_overflow;
2483 opnum = be32_to_cpup(p++);
2484 if (opnum != expected) {
2485 dprintk("nfs: Server returned operation"
2486 " %d but we issued a request for %d\n",
2487 opnum, expected);
2488 return -EIO;
2489 }
2490 nfserr = be32_to_cpup(p);
2491 if (nfserr != NFS_OK)
2492 return nfs4_stat_to_errno(nfserr);
2493 return 0;
2494 out_overflow:
2495 print_overflow_msg(__func__, xdr);
2496 return -EIO;
2497 }
2498
2499 /* Dummy routine */
2500 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2501 {
2502 __be32 *p;
2503 unsigned int strlen;
2504 char *str;
2505
2506 p = xdr_inline_decode(xdr, 12);
2507 if (likely(p))
2508 return decode_opaque_inline(xdr, &strlen, &str);
2509 print_overflow_msg(__func__, xdr);
2510 return -EIO;
2511 }
2512
2513 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2514 {
2515 uint32_t bmlen;
2516 __be32 *p;
2517
2518 p = xdr_inline_decode(xdr, 4);
2519 if (unlikely(!p))
2520 goto out_overflow;
2521 bmlen = be32_to_cpup(p);
2522
2523 bitmap[0] = bitmap[1] = 0;
2524 p = xdr_inline_decode(xdr, (bmlen << 2));
2525 if (unlikely(!p))
2526 goto out_overflow;
2527 if (bmlen > 0) {
2528 bitmap[0] = be32_to_cpup(p++);
2529 if (bmlen > 1)
2530 bitmap[1] = be32_to_cpup(p);
2531 }
2532 return 0;
2533 out_overflow:
2534 print_overflow_msg(__func__, xdr);
2535 return -EIO;
2536 }
2537
2538 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2539 {
2540 __be32 *p;
2541
2542 p = xdr_inline_decode(xdr, 4);
2543 if (unlikely(!p))
2544 goto out_overflow;
2545 *attrlen = be32_to_cpup(p);
2546 *savep = xdr->p;
2547 return 0;
2548 out_overflow:
2549 print_overflow_msg(__func__, xdr);
2550 return -EIO;
2551 }
2552
2553 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2554 {
2555 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2556 decode_attr_bitmap(xdr, bitmask);
2557 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2558 } else
2559 bitmask[0] = bitmask[1] = 0;
2560 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2561 return 0;
2562 }
2563
2564 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2565 {
2566 __be32 *p;
2567 int ret = 0;
2568
2569 *type = 0;
2570 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2571 return -EIO;
2572 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2573 p = xdr_inline_decode(xdr, 4);
2574 if (unlikely(!p))
2575 goto out_overflow;
2576 *type = be32_to_cpup(p);
2577 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2578 dprintk("%s: bad type %d\n", __func__, *type);
2579 return -EIO;
2580 }
2581 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2582 ret = NFS_ATTR_FATTR_TYPE;
2583 }
2584 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2585 return ret;
2586 out_overflow:
2587 print_overflow_msg(__func__, xdr);
2588 return -EIO;
2589 }
2590
2591 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2592 {
2593 __be32 *p;
2594 int ret = 0;
2595
2596 *change = 0;
2597 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2598 return -EIO;
2599 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2600 p = xdr_inline_decode(xdr, 8);
2601 if (unlikely(!p))
2602 goto out_overflow;
2603 xdr_decode_hyper(p, change);
2604 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2605 ret = NFS_ATTR_FATTR_CHANGE;
2606 }
2607 dprintk("%s: change attribute=%Lu\n", __func__,
2608 (unsigned long long)*change);
2609 return ret;
2610 out_overflow:
2611 print_overflow_msg(__func__, xdr);
2612 return -EIO;
2613 }
2614
2615 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2616 {
2617 __be32 *p;
2618 int ret = 0;
2619
2620 *size = 0;
2621 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2622 return -EIO;
2623 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2624 p = xdr_inline_decode(xdr, 8);
2625 if (unlikely(!p))
2626 goto out_overflow;
2627 xdr_decode_hyper(p, size);
2628 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2629 ret = NFS_ATTR_FATTR_SIZE;
2630 }
2631 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2632 return ret;
2633 out_overflow:
2634 print_overflow_msg(__func__, xdr);
2635 return -EIO;
2636 }
2637
2638 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2639 {
2640 __be32 *p;
2641
2642 *res = 0;
2643 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2644 return -EIO;
2645 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2646 p = xdr_inline_decode(xdr, 4);
2647 if (unlikely(!p))
2648 goto out_overflow;
2649 *res = be32_to_cpup(p);
2650 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2651 }
2652 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2653 return 0;
2654 out_overflow:
2655 print_overflow_msg(__func__, xdr);
2656 return -EIO;
2657 }
2658
2659 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2660 {
2661 __be32 *p;
2662
2663 *res = 0;
2664 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2665 return -EIO;
2666 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2667 p = xdr_inline_decode(xdr, 4);
2668 if (unlikely(!p))
2669 goto out_overflow;
2670 *res = be32_to_cpup(p);
2671 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2672 }
2673 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2674 return 0;
2675 out_overflow:
2676 print_overflow_msg(__func__, xdr);
2677 return -EIO;
2678 }
2679
2680 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2681 {
2682 __be32 *p;
2683 int ret = 0;
2684
2685 fsid->major = 0;
2686 fsid->minor = 0;
2687 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2688 return -EIO;
2689 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2690 p = xdr_inline_decode(xdr, 16);
2691 if (unlikely(!p))
2692 goto out_overflow;
2693 p = xdr_decode_hyper(p, &fsid->major);
2694 xdr_decode_hyper(p, &fsid->minor);
2695 bitmap[0] &= ~FATTR4_WORD0_FSID;
2696 ret = NFS_ATTR_FATTR_FSID;
2697 }
2698 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2699 (unsigned long long)fsid->major,
2700 (unsigned long long)fsid->minor);
2701 return ret;
2702 out_overflow:
2703 print_overflow_msg(__func__, xdr);
2704 return -EIO;
2705 }
2706
2707 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2708 {
2709 __be32 *p;
2710
2711 *res = 60;
2712 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2713 return -EIO;
2714 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2715 p = xdr_inline_decode(xdr, 4);
2716 if (unlikely(!p))
2717 goto out_overflow;
2718 *res = be32_to_cpup(p);
2719 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2720 }
2721 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2722 return 0;
2723 out_overflow:
2724 print_overflow_msg(__func__, xdr);
2725 return -EIO;
2726 }
2727
2728 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2729 {
2730 __be32 *p;
2731
2732 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2733 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2734 return -EIO;
2735 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2736 p = xdr_inline_decode(xdr, 4);
2737 if (unlikely(!p))
2738 goto out_overflow;
2739 *res = be32_to_cpup(p);
2740 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2741 }
2742 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2743 return 0;
2744 out_overflow:
2745 print_overflow_msg(__func__, xdr);
2746 return -EIO;
2747 }
2748
2749 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2750 {
2751 __be32 *p;
2752 int ret = 0;
2753
2754 *fileid = 0;
2755 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2756 return -EIO;
2757 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2758 p = xdr_inline_decode(xdr, 8);
2759 if (unlikely(!p))
2760 goto out_overflow;
2761 xdr_decode_hyper(p, fileid);
2762 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2763 ret = NFS_ATTR_FATTR_FILEID;
2764 }
2765 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2766 return ret;
2767 out_overflow:
2768 print_overflow_msg(__func__, xdr);
2769 return -EIO;
2770 }
2771
2772 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2773 {
2774 __be32 *p;
2775 int ret = 0;
2776
2777 *fileid = 0;
2778 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2779 return -EIO;
2780 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2781 p = xdr_inline_decode(xdr, 8);
2782 if (unlikely(!p))
2783 goto out_overflow;
2784 xdr_decode_hyper(p, fileid);
2785 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2786 ret = NFS_ATTR_FATTR_FILEID;
2787 }
2788 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2789 return ret;
2790 out_overflow:
2791 print_overflow_msg(__func__, xdr);
2792 return -EIO;
2793 }
2794
2795 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2796 {
2797 __be32 *p;
2798 int status = 0;
2799
2800 *res = 0;
2801 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2802 return -EIO;
2803 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2804 p = xdr_inline_decode(xdr, 8);
2805 if (unlikely(!p))
2806 goto out_overflow;
2807 xdr_decode_hyper(p, res);
2808 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2809 }
2810 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2811 return status;
2812 out_overflow:
2813 print_overflow_msg(__func__, xdr);
2814 return -EIO;
2815 }
2816
2817 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2818 {
2819 __be32 *p;
2820 int status = 0;
2821
2822 *res = 0;
2823 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2824 return -EIO;
2825 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2826 p = xdr_inline_decode(xdr, 8);
2827 if (unlikely(!p))
2828 goto out_overflow;
2829 xdr_decode_hyper(p, res);
2830 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2831 }
2832 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2833 return status;
2834 out_overflow:
2835 print_overflow_msg(__func__, xdr);
2836 return -EIO;
2837 }
2838
2839 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2840 {
2841 __be32 *p;
2842 int status = 0;
2843
2844 *res = 0;
2845 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2846 return -EIO;
2847 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2848 p = xdr_inline_decode(xdr, 8);
2849 if (unlikely(!p))
2850 goto out_overflow;
2851 xdr_decode_hyper(p, res);
2852 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2853 }
2854 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2855 return status;
2856 out_overflow:
2857 print_overflow_msg(__func__, xdr);
2858 return -EIO;
2859 }
2860
2861 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2862 {
2863 u32 n;
2864 __be32 *p;
2865 int status = 0;
2866
2867 p = xdr_inline_decode(xdr, 4);
2868 if (unlikely(!p))
2869 goto out_overflow;
2870 n = be32_to_cpup(p);
2871 if (n == 0)
2872 goto root_path;
2873 dprintk("path ");
2874 path->ncomponents = 0;
2875 while (path->ncomponents < n) {
2876 struct nfs4_string *component = &path->components[path->ncomponents];
2877 status = decode_opaque_inline(xdr, &component->len, &component->data);
2878 if (unlikely(status != 0))
2879 goto out_eio;
2880 if (path->ncomponents != n)
2881 dprintk("/");
2882 dprintk("%s", component->data);
2883 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2884 path->ncomponents++;
2885 else {
2886 dprintk("cannot parse %d components in path\n", n);
2887 goto out_eio;
2888 }
2889 }
2890 out:
2891 dprintk("\n");
2892 return status;
2893 root_path:
2894 /* a root pathname is sent as a zero component4 */
2895 path->ncomponents = 1;
2896 path->components[0].len=0;
2897 path->components[0].data=NULL;
2898 dprintk("path /\n");
2899 goto out;
2900 out_eio:
2901 dprintk(" status %d", status);
2902 status = -EIO;
2903 goto out;
2904 out_overflow:
2905 print_overflow_msg(__func__, xdr);
2906 return -EIO;
2907 }
2908
2909 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2910 {
2911 int n;
2912 __be32 *p;
2913 int status = -EIO;
2914
2915 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2916 goto out;
2917 status = 0;
2918 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2919 goto out;
2920 dprintk("%s: fsroot ", __func__);
2921 status = decode_pathname(xdr, &res->fs_path);
2922 if (unlikely(status != 0))
2923 goto out;
2924 p = xdr_inline_decode(xdr, 4);
2925 if (unlikely(!p))
2926 goto out_overflow;
2927 n = be32_to_cpup(p);
2928 if (n <= 0)
2929 goto out_eio;
2930 res->nlocations = 0;
2931 while (res->nlocations < n) {
2932 u32 m;
2933 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2934
2935 p = xdr_inline_decode(xdr, 4);
2936 if (unlikely(!p))
2937 goto out_overflow;
2938 m = be32_to_cpup(p);
2939
2940 loc->nservers = 0;
2941 dprintk("%s: servers ", __func__);
2942 while (loc->nservers < m) {
2943 struct nfs4_string *server = &loc->servers[loc->nservers];
2944 status = decode_opaque_inline(xdr, &server->len, &server->data);
2945 if (unlikely(status != 0))
2946 goto out_eio;
2947 dprintk("%s ", server->data);
2948 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2949 loc->nservers++;
2950 else {
2951 unsigned int i;
2952 dprintk("%s: using first %u of %u servers "
2953 "returned for location %u\n",
2954 __func__,
2955 NFS4_FS_LOCATION_MAXSERVERS,
2956 m, res->nlocations);
2957 for (i = loc->nservers; i < m; i++) {
2958 unsigned int len;
2959 char *data;
2960 status = decode_opaque_inline(xdr, &len, &data);
2961 if (unlikely(status != 0))
2962 goto out_eio;
2963 }
2964 }
2965 }
2966 status = decode_pathname(xdr, &loc->rootpath);
2967 if (unlikely(status != 0))
2968 goto out_eio;
2969 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2970 res->nlocations++;
2971 }
2972 if (res->nlocations != 0)
2973 status = NFS_ATTR_FATTR_V4_REFERRAL;
2974 out:
2975 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2976 return status;
2977 out_overflow:
2978 print_overflow_msg(__func__, xdr);
2979 out_eio:
2980 status = -EIO;
2981 goto out;
2982 }
2983
2984 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2985 {
2986 __be32 *p;
2987 int status = 0;
2988
2989 *res = 0;
2990 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2991 return -EIO;
2992 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2993 p = xdr_inline_decode(xdr, 8);
2994 if (unlikely(!p))
2995 goto out_overflow;
2996 xdr_decode_hyper(p, res);
2997 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2998 }
2999 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3000 return status;
3001 out_overflow:
3002 print_overflow_msg(__func__, xdr);
3003 return -EIO;
3004 }
3005
3006 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3007 {
3008 __be32 *p;
3009 int status = 0;
3010
3011 *maxlink = 1;
3012 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3013 return -EIO;
3014 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3015 p = xdr_inline_decode(xdr, 4);
3016 if (unlikely(!p))
3017 goto out_overflow;
3018 *maxlink = be32_to_cpup(p);
3019 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3020 }
3021 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3022 return status;
3023 out_overflow:
3024 print_overflow_msg(__func__, xdr);
3025 return -EIO;
3026 }
3027
3028 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3029 {
3030 __be32 *p;
3031 int status = 0;
3032
3033 *maxname = 1024;
3034 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3035 return -EIO;
3036 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3037 p = xdr_inline_decode(xdr, 4);
3038 if (unlikely(!p))
3039 goto out_overflow;
3040 *maxname = be32_to_cpup(p);
3041 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3042 }
3043 dprintk("%s: maxname=%u\n", __func__, *maxname);
3044 return status;
3045 out_overflow:
3046 print_overflow_msg(__func__, xdr);
3047 return -EIO;
3048 }
3049
3050 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3051 {
3052 __be32 *p;
3053 int status = 0;
3054
3055 *res = 1024;
3056 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3057 return -EIO;
3058 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3059 uint64_t maxread;
3060 p = xdr_inline_decode(xdr, 8);
3061 if (unlikely(!p))
3062 goto out_overflow;
3063 xdr_decode_hyper(p, &maxread);
3064 if (maxread > 0x7FFFFFFF)
3065 maxread = 0x7FFFFFFF;
3066 *res = (uint32_t)maxread;
3067 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3068 }
3069 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3070 return status;
3071 out_overflow:
3072 print_overflow_msg(__func__, xdr);
3073 return -EIO;
3074 }
3075
3076 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3077 {
3078 __be32 *p;
3079 int status = 0;
3080
3081 *res = 1024;
3082 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3083 return -EIO;
3084 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3085 uint64_t maxwrite;
3086 p = xdr_inline_decode(xdr, 8);
3087 if (unlikely(!p))
3088 goto out_overflow;
3089 xdr_decode_hyper(p, &maxwrite);
3090 if (maxwrite > 0x7FFFFFFF)
3091 maxwrite = 0x7FFFFFFF;
3092 *res = (uint32_t)maxwrite;
3093 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3094 }
3095 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3096 return status;
3097 out_overflow:
3098 print_overflow_msg(__func__, xdr);
3099 return -EIO;
3100 }
3101
3102 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3103 {
3104 uint32_t tmp;
3105 __be32 *p;
3106 int ret = 0;
3107
3108 *mode = 0;
3109 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3110 return -EIO;
3111 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3112 p = xdr_inline_decode(xdr, 4);
3113 if (unlikely(!p))
3114 goto out_overflow;
3115 tmp = be32_to_cpup(p);
3116 *mode = tmp & ~S_IFMT;
3117 bitmap[1] &= ~FATTR4_WORD1_MODE;
3118 ret = NFS_ATTR_FATTR_MODE;
3119 }
3120 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3121 return ret;
3122 out_overflow:
3123 print_overflow_msg(__func__, xdr);
3124 return -EIO;
3125 }
3126
3127 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3128 {
3129 __be32 *p;
3130 int ret = 0;
3131
3132 *nlink = 1;
3133 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3134 return -EIO;
3135 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3136 p = xdr_inline_decode(xdr, 4);
3137 if (unlikely(!p))
3138 goto out_overflow;
3139 *nlink = be32_to_cpup(p);
3140 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3141 ret = NFS_ATTR_FATTR_NLINK;
3142 }
3143 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3144 return ret;
3145 out_overflow:
3146 print_overflow_msg(__func__, xdr);
3147 return -EIO;
3148 }
3149
3150 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3151 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3152 {
3153 uint32_t len;
3154 __be32 *p;
3155 int ret = 0;
3156
3157 *uid = -2;
3158 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3159 return -EIO;
3160 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3161 p = xdr_inline_decode(xdr, 4);
3162 if (unlikely(!p))
3163 goto out_overflow;
3164 len = be32_to_cpup(p);
3165 p = xdr_inline_decode(xdr, len);
3166 if (unlikely(!p))
3167 goto out_overflow;
3168 if (!may_sleep) {
3169 /* do nothing */
3170 } else if (len < XDR_MAX_NETOBJ) {
3171 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3172 ret = NFS_ATTR_FATTR_OWNER;
3173 else
3174 dprintk("%s: nfs_map_name_to_uid failed!\n",
3175 __func__);
3176 } else
3177 dprintk("%s: name too long (%u)!\n",
3178 __func__, len);
3179 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3180 }
3181 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3182 return ret;
3183 out_overflow:
3184 print_overflow_msg(__func__, xdr);
3185 return -EIO;
3186 }
3187
3188 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3189 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3190 {
3191 uint32_t len;
3192 __be32 *p;
3193 int ret = 0;
3194
3195 *gid = -2;
3196 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3197 return -EIO;
3198 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3199 p = xdr_inline_decode(xdr, 4);
3200 if (unlikely(!p))
3201 goto out_overflow;
3202 len = be32_to_cpup(p);
3203 p = xdr_inline_decode(xdr, len);
3204 if (unlikely(!p))
3205 goto out_overflow;
3206 if (!may_sleep) {
3207 /* do nothing */
3208 } else if (len < XDR_MAX_NETOBJ) {
3209 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3210 ret = NFS_ATTR_FATTR_GROUP;
3211 else
3212 dprintk("%s: nfs_map_group_to_gid failed!\n",
3213 __func__);
3214 } else
3215 dprintk("%s: name too long (%u)!\n",
3216 __func__, len);
3217 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3218 }
3219 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3220 return ret;
3221 out_overflow:
3222 print_overflow_msg(__func__, xdr);
3223 return -EIO;
3224 }
3225
3226 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3227 {
3228 uint32_t major = 0, minor = 0;
3229 __be32 *p;
3230 int ret = 0;
3231
3232 *rdev = MKDEV(0,0);
3233 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3234 return -EIO;
3235 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3236 dev_t tmp;
3237
3238 p = xdr_inline_decode(xdr, 8);
3239 if (unlikely(!p))
3240 goto out_overflow;
3241 major = be32_to_cpup(p++);
3242 minor = be32_to_cpup(p);
3243 tmp = MKDEV(major, minor);
3244 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3245 *rdev = tmp;
3246 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3247 ret = NFS_ATTR_FATTR_RDEV;
3248 }
3249 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3250 return ret;
3251 out_overflow:
3252 print_overflow_msg(__func__, xdr);
3253 return -EIO;
3254 }
3255
3256 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3257 {
3258 __be32 *p;
3259 int status = 0;
3260
3261 *res = 0;
3262 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3263 return -EIO;
3264 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3265 p = xdr_inline_decode(xdr, 8);
3266 if (unlikely(!p))
3267 goto out_overflow;
3268 xdr_decode_hyper(p, res);
3269 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3270 }
3271 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3272 return status;
3273 out_overflow:
3274 print_overflow_msg(__func__, xdr);
3275 return -EIO;
3276 }
3277
3278 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3279 {
3280 __be32 *p;
3281 int status = 0;
3282
3283 *res = 0;
3284 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3285 return -EIO;
3286 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3287 p = xdr_inline_decode(xdr, 8);
3288 if (unlikely(!p))
3289 goto out_overflow;
3290 xdr_decode_hyper(p, res);
3291 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3292 }
3293 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3294 return status;
3295 out_overflow:
3296 print_overflow_msg(__func__, xdr);
3297 return -EIO;
3298 }
3299
3300 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3301 {
3302 __be32 *p;
3303 int status = 0;
3304
3305 *res = 0;
3306 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3307 return -EIO;
3308 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3309 p = xdr_inline_decode(xdr, 8);
3310 if (unlikely(!p))
3311 goto out_overflow;
3312 xdr_decode_hyper(p, res);
3313 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3314 }
3315 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3316 return status;
3317 out_overflow:
3318 print_overflow_msg(__func__, xdr);
3319 return -EIO;
3320 }
3321
3322 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3323 {
3324 __be32 *p;
3325 int ret = 0;
3326
3327 *used = 0;
3328 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3329 return -EIO;
3330 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3331 p = xdr_inline_decode(xdr, 8);
3332 if (unlikely(!p))
3333 goto out_overflow;
3334 xdr_decode_hyper(p, used);
3335 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3336 ret = NFS_ATTR_FATTR_SPACE_USED;
3337 }
3338 dprintk("%s: space used=%Lu\n", __func__,
3339 (unsigned long long)*used);
3340 return ret;
3341 out_overflow:
3342 print_overflow_msg(__func__, xdr);
3343 return -EIO;
3344 }
3345
3346 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3347 {
3348 __be32 *p;
3349 uint64_t sec;
3350 uint32_t nsec;
3351
3352 p = xdr_inline_decode(xdr, 12);
3353 if (unlikely(!p))
3354 goto out_overflow;
3355 p = xdr_decode_hyper(p, &sec);
3356 nsec = be32_to_cpup(p);
3357 time->tv_sec = (time_t)sec;
3358 time->tv_nsec = (long)nsec;
3359 return 0;
3360 out_overflow:
3361 print_overflow_msg(__func__, xdr);
3362 return -EIO;
3363 }
3364
3365 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3366 {
3367 int status = 0;
3368
3369 time->tv_sec = 0;
3370 time->tv_nsec = 0;
3371 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3372 return -EIO;
3373 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3374 status = decode_attr_time(xdr, time);
3375 if (status == 0)
3376 status = NFS_ATTR_FATTR_ATIME;
3377 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3378 }
3379 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3380 return status;
3381 }
3382
3383 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3384 {
3385 int status = 0;
3386
3387 time->tv_sec = 0;
3388 time->tv_nsec = 0;
3389 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3390 return -EIO;
3391 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3392 status = decode_attr_time(xdr, time);
3393 if (status == 0)
3394 status = NFS_ATTR_FATTR_CTIME;
3395 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3396 }
3397 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3398 return status;
3399 }
3400
3401 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3402 {
3403 int status = 0;
3404
3405 time->tv_sec = 0;
3406 time->tv_nsec = 0;
3407 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3408 return -EIO;
3409 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3410 status = decode_attr_time(xdr, time);
3411 if (status == 0)
3412 status = NFS_ATTR_FATTR_MTIME;
3413 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3414 }
3415 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3416 return status;
3417 }
3418
3419 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3420 {
3421 unsigned int attrwords = XDR_QUADLEN(attrlen);
3422 unsigned int nwords = xdr->p - savep;
3423
3424 if (unlikely(attrwords != nwords)) {
3425 dprintk("%s: server returned incorrect attribute length: "
3426 "%u %c %u\n",
3427 __func__,
3428 attrwords << 2,
3429 (attrwords < nwords) ? '<' : '>',
3430 nwords << 2);
3431 return -EIO;
3432 }
3433 return 0;
3434 }
3435
3436 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3437 {
3438 __be32 *p;
3439
3440 p = xdr_inline_decode(xdr, 20);
3441 if (unlikely(!p))
3442 goto out_overflow;
3443 cinfo->atomic = be32_to_cpup(p++);
3444 p = xdr_decode_hyper(p, &cinfo->before);
3445 xdr_decode_hyper(p, &cinfo->after);
3446 return 0;
3447 out_overflow:
3448 print_overflow_msg(__func__, xdr);
3449 return -EIO;
3450 }
3451
3452 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3453 {
3454 __be32 *p;
3455 uint32_t supp, acc;
3456 int status;
3457
3458 status = decode_op_hdr(xdr, OP_ACCESS);
3459 if (status)
3460 return status;
3461 p = xdr_inline_decode(xdr, 8);
3462 if (unlikely(!p))
3463 goto out_overflow;
3464 supp = be32_to_cpup(p++);
3465 acc = be32_to_cpup(p);
3466 access->supported = supp;
3467 access->access = acc;
3468 return 0;
3469 out_overflow:
3470 print_overflow_msg(__func__, xdr);
3471 return -EIO;
3472 }
3473
3474 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3475 {
3476 __be32 *p;
3477
3478 p = xdr_inline_decode(xdr, len);
3479 if (likely(p)) {
3480 memcpy(buf, p, len);
3481 return 0;
3482 }
3483 print_overflow_msg(__func__, xdr);
3484 return -EIO;
3485 }
3486
3487 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3488 {
3489 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3490 }
3491
3492 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3493 {
3494 int status;
3495
3496 status = decode_op_hdr(xdr, OP_CLOSE);
3497 if (status != -EIO)
3498 nfs_increment_open_seqid(status, res->seqid);
3499 if (!status)
3500 status = decode_stateid(xdr, &res->stateid);
3501 return status;
3502 }
3503
3504 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3505 {
3506 return decode_opaque_fixed(xdr, verifier, 8);
3507 }
3508
3509 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3510 {
3511 int status;
3512
3513 status = decode_op_hdr(xdr, OP_COMMIT);
3514 if (!status)
3515 status = decode_verifier(xdr, res->verf->verifier);
3516 return status;
3517 }
3518
3519 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3520 {
3521 __be32 *p;
3522 uint32_t bmlen;
3523 int status;
3524
3525 status = decode_op_hdr(xdr, OP_CREATE);
3526 if (status)
3527 return status;
3528 if ((status = decode_change_info(xdr, cinfo)))
3529 return status;
3530 p = xdr_inline_decode(xdr, 4);
3531 if (unlikely(!p))
3532 goto out_overflow;
3533 bmlen = be32_to_cpup(p);
3534 p = xdr_inline_decode(xdr, bmlen << 2);
3535 if (likely(p))
3536 return 0;
3537 out_overflow:
3538 print_overflow_msg(__func__, xdr);
3539 return -EIO;
3540 }
3541
3542 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3543 {
3544 __be32 *savep;
3545 uint32_t attrlen, bitmap[2] = {0};
3546 int status;
3547
3548 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3549 goto xdr_error;
3550 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3551 goto xdr_error;
3552 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3553 goto xdr_error;
3554 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3555 goto xdr_error;
3556 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3557 goto xdr_error;
3558 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3559 goto xdr_error;
3560 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3561 goto xdr_error;
3562 status = verify_attr_len(xdr, savep, attrlen);
3563 xdr_error:
3564 dprintk("%s: xdr returned %d!\n", __func__, -status);
3565 return status;
3566 }
3567
3568 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3569 {
3570 __be32 *savep;
3571 uint32_t attrlen, bitmap[2] = {0};
3572 int status;
3573
3574 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3575 goto xdr_error;
3576 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3577 goto xdr_error;
3578 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3579 goto xdr_error;
3580
3581 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3582 goto xdr_error;
3583 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3584 goto xdr_error;
3585 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3586 goto xdr_error;
3587 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3588 goto xdr_error;
3589 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3590 goto xdr_error;
3591 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3592 goto xdr_error;
3593
3594 status = verify_attr_len(xdr, savep, attrlen);
3595 xdr_error:
3596 dprintk("%s: xdr returned %d!\n", __func__, -status);
3597 return status;
3598 }
3599
3600 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3601 {
3602 __be32 *savep;
3603 uint32_t attrlen, bitmap[2] = {0};
3604 int status;
3605
3606 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3607 goto xdr_error;
3608 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3609 goto xdr_error;
3610 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3611 goto xdr_error;
3612
3613 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3614 goto xdr_error;
3615 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3616 goto xdr_error;
3617
3618 status = verify_attr_len(xdr, savep, attrlen);
3619 xdr_error:
3620 dprintk("%s: xdr returned %d!\n", __func__, -status);
3621 return status;
3622 }
3623
3624 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3625 const struct nfs_server *server, int may_sleep)
3626 {
3627 __be32 *savep;
3628 uint32_t attrlen,
3629 bitmap[2] = {0},
3630 type;
3631 int status;
3632 umode_t fmode = 0;
3633 uint64_t fileid;
3634
3635 status = decode_op_hdr(xdr, OP_GETATTR);
3636 if (status < 0)
3637 goto xdr_error;
3638
3639 status = decode_attr_bitmap(xdr, bitmap);
3640 if (status < 0)
3641 goto xdr_error;
3642
3643 status = decode_attr_length(xdr, &attrlen, &savep);
3644 if (status < 0)
3645 goto xdr_error;
3646
3647
3648 status = decode_attr_type(xdr, bitmap, &type);
3649 if (status < 0)
3650 goto xdr_error;
3651 fattr->mode = 0;
3652 if (status != 0) {
3653 fattr->mode |= nfs_type2fmt[type];
3654 fattr->valid |= status;
3655 }
3656
3657 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3658 if (status < 0)
3659 goto xdr_error;
3660 fattr->valid |= status;
3661
3662 status = decode_attr_size(xdr, bitmap, &fattr->size);
3663 if (status < 0)
3664 goto xdr_error;
3665 fattr->valid |= status;
3666
3667 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3668 if (status < 0)
3669 goto xdr_error;
3670 fattr->valid |= status;
3671
3672 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3673 if (status < 0)
3674 goto xdr_error;
3675 fattr->valid |= status;
3676
3677 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3678 struct nfs4_fs_locations,
3679 fattr));
3680 if (status < 0)
3681 goto xdr_error;
3682 fattr->valid |= status;
3683
3684 status = decode_attr_mode(xdr, bitmap, &fmode);
3685 if (status < 0)
3686 goto xdr_error;
3687 if (status != 0) {
3688 fattr->mode |= fmode;
3689 fattr->valid |= status;
3690 }
3691
3692 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3693 if (status < 0)
3694 goto xdr_error;
3695 fattr->valid |= status;
3696
3697 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3698 &fattr->uid, may_sleep);
3699 if (status < 0)
3700 goto xdr_error;
3701 fattr->valid |= status;
3702
3703 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3704 &fattr->gid, may_sleep);
3705 if (status < 0)
3706 goto xdr_error;
3707 fattr->valid |= status;
3708
3709 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3710 if (status < 0)
3711 goto xdr_error;
3712 fattr->valid |= status;
3713
3714 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3715 if (status < 0)
3716 goto xdr_error;
3717 fattr->valid |= status;
3718
3719 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3720 if (status < 0)
3721 goto xdr_error;
3722 fattr->valid |= status;
3723
3724 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3725 if (status < 0)
3726 goto xdr_error;
3727 fattr->valid |= status;
3728
3729 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3730 if (status < 0)
3731 goto xdr_error;
3732 fattr->valid |= status;
3733
3734 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3735 if (status < 0)
3736 goto xdr_error;
3737 if (status != 0 && !(fattr->valid & status)) {
3738 fattr->fileid = fileid;
3739 fattr->valid |= status;
3740 }
3741
3742 status = verify_attr_len(xdr, savep, attrlen);
3743 xdr_error:
3744 dprintk("%s: xdr returned %d\n", __func__, -status);
3745 return status;
3746 }
3747
3748
3749 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3750 {
3751 __be32 *savep;
3752 uint32_t attrlen, bitmap[2];
3753 int status;
3754
3755 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3756 goto xdr_error;
3757 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3758 goto xdr_error;
3759 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3760 goto xdr_error;
3761
3762 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3763
3764 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3765 goto xdr_error;
3766 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3767 goto xdr_error;
3768 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3769 goto xdr_error;
3770 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3771 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3772 goto xdr_error;
3773 fsinfo->wtpref = fsinfo->wtmax;
3774
3775 status = verify_attr_len(xdr, savep, attrlen);
3776 xdr_error:
3777 dprintk("%s: xdr returned %d!\n", __func__, -status);
3778 return status;
3779 }
3780
3781 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3782 {
3783 __be32 *p;
3784 uint32_t len;
3785 int status;
3786
3787 /* Zero handle first to allow comparisons */
3788 memset(fh, 0, sizeof(*fh));
3789
3790 status = decode_op_hdr(xdr, OP_GETFH);
3791 if (status)
3792 return status;
3793
3794 p = xdr_inline_decode(xdr, 4);
3795 if (unlikely(!p))
3796 goto out_overflow;
3797 len = be32_to_cpup(p);
3798 if (len > NFS4_FHSIZE)
3799 return -EIO;
3800 fh->size = len;
3801 p = xdr_inline_decode(xdr, len);
3802 if (unlikely(!p))
3803 goto out_overflow;
3804 memcpy(fh->data, p, len);
3805 return 0;
3806 out_overflow:
3807 print_overflow_msg(__func__, xdr);
3808 return -EIO;
3809 }
3810
3811 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3812 {
3813 int status;
3814
3815 status = decode_op_hdr(xdr, OP_LINK);
3816 if (status)
3817 return status;
3818 return decode_change_info(xdr, cinfo);
3819 }
3820
3821 /*
3822 * We create the owner, so we know a proper owner.id length is 4.
3823 */
3824 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3825 {
3826 uint64_t offset, length, clientid;
3827 __be32 *p;
3828 uint32_t namelen, type;
3829
3830 p = xdr_inline_decode(xdr, 32);
3831 if (unlikely(!p))
3832 goto out_overflow;
3833 p = xdr_decode_hyper(p, &offset);
3834 p = xdr_decode_hyper(p, &length);
3835 type = be32_to_cpup(p++);
3836 if (fl != NULL) {
3837 fl->fl_start = (loff_t)offset;
3838 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3839 if (length == ~(uint64_t)0)
3840 fl->fl_end = OFFSET_MAX;
3841 fl->fl_type = F_WRLCK;
3842 if (type & 1)
3843 fl->fl_type = F_RDLCK;
3844 fl->fl_pid = 0;
3845 }
3846 p = xdr_decode_hyper(p, &clientid);
3847 namelen = be32_to_cpup(p);
3848 p = xdr_inline_decode(xdr, namelen);
3849 if (likely(p))
3850 return -NFS4ERR_DENIED;
3851 out_overflow:
3852 print_overflow_msg(__func__, xdr);
3853 return -EIO;
3854 }
3855
3856 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3857 {
3858 int status;
3859
3860 status = decode_op_hdr(xdr, OP_LOCK);
3861 if (status == -EIO)
3862 goto out;
3863 if (status == 0) {
3864 status = decode_stateid(xdr, &res->stateid);
3865 if (unlikely(status))
3866 goto out;
3867 } else if (status == -NFS4ERR_DENIED)
3868 status = decode_lock_denied(xdr, NULL);
3869 if (res->open_seqid != NULL)
3870 nfs_increment_open_seqid(status, res->open_seqid);
3871 nfs_increment_lock_seqid(status, res->lock_seqid);
3872 out:
3873 return status;
3874 }
3875
3876 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3877 {
3878 int status;
3879 status = decode_op_hdr(xdr, OP_LOCKT);
3880 if (status == -NFS4ERR_DENIED)
3881 return decode_lock_denied(xdr, res->denied);
3882 return status;
3883 }
3884
3885 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3886 {
3887 int status;
3888
3889 status = decode_op_hdr(xdr, OP_LOCKU);
3890 if (status != -EIO)
3891 nfs_increment_lock_seqid(status, res->seqid);
3892 if (status == 0)
3893 status = decode_stateid(xdr, &res->stateid);
3894 return status;
3895 }
3896
3897 static int decode_lookup(struct xdr_stream *xdr)
3898 {
3899 return decode_op_hdr(xdr, OP_LOOKUP);
3900 }
3901
3902 /* This is too sick! */
3903 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3904 {
3905 __be32 *p;
3906 uint32_t limit_type, nblocks, blocksize;
3907
3908 p = xdr_inline_decode(xdr, 12);
3909 if (unlikely(!p))
3910 goto out_overflow;
3911 limit_type = be32_to_cpup(p++);
3912 switch (limit_type) {
3913 case 1:
3914 xdr_decode_hyper(p, maxsize);
3915 break;
3916 case 2:
3917 nblocks = be32_to_cpup(p++);
3918 blocksize = be32_to_cpup(p);
3919 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3920 }
3921 return 0;
3922 out_overflow:
3923 print_overflow_msg(__func__, xdr);
3924 return -EIO;
3925 }
3926
3927 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3928 {
3929 __be32 *p;
3930 uint32_t delegation_type;
3931 int status;
3932
3933 p = xdr_inline_decode(xdr, 4);
3934 if (unlikely(!p))
3935 goto out_overflow;
3936 delegation_type = be32_to_cpup(p);
3937 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3938 res->delegation_type = 0;
3939 return 0;
3940 }
3941 status = decode_stateid(xdr, &res->delegation);
3942 if (unlikely(status))
3943 return status;
3944 p = xdr_inline_decode(xdr, 4);
3945 if (unlikely(!p))
3946 goto out_overflow;
3947 res->do_recall = be32_to_cpup(p);
3948
3949 switch (delegation_type) {
3950 case NFS4_OPEN_DELEGATE_READ:
3951 res->delegation_type = FMODE_READ;
3952 break;
3953 case NFS4_OPEN_DELEGATE_WRITE:
3954 res->delegation_type = FMODE_WRITE|FMODE_READ;
3955 if (decode_space_limit(xdr, &res->maxsize) < 0)
3956 return -EIO;
3957 }
3958 return decode_ace(xdr, NULL, res->server->nfs_client);
3959 out_overflow:
3960 print_overflow_msg(__func__, xdr);
3961 return -EIO;
3962 }
3963
3964 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3965 {
3966 __be32 *p;
3967 uint32_t savewords, bmlen, i;
3968 int status;
3969
3970 status = decode_op_hdr(xdr, OP_OPEN);
3971 if (status != -EIO)
3972 nfs_increment_open_seqid(status, res->seqid);
3973 if (!status)
3974 status = decode_stateid(xdr, &res->stateid);
3975 if (unlikely(status))
3976 return status;
3977
3978 decode_change_info(xdr, &res->cinfo);
3979
3980 p = xdr_inline_decode(xdr, 8);
3981 if (unlikely(!p))
3982 goto out_overflow;
3983 res->rflags = be32_to_cpup(p++);
3984 bmlen = be32_to_cpup(p);
3985 if (bmlen > 10)
3986 goto xdr_error;
3987
3988 p = xdr_inline_decode(xdr, bmlen << 2);
3989 if (unlikely(!p))
3990 goto out_overflow;
3991 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3992 for (i = 0; i < savewords; ++i)
3993 res->attrset[i] = be32_to_cpup(p++);
3994 for (; i < NFS4_BITMAP_SIZE; i++)
3995 res->attrset[i] = 0;
3996
3997 return decode_delegation(xdr, res);
3998 xdr_error:
3999 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4000 return -EIO;
4001 out_overflow:
4002 print_overflow_msg(__func__, xdr);
4003 return -EIO;
4004 }
4005
4006 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4007 {
4008 int status;
4009
4010 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4011 if (status != -EIO)
4012 nfs_increment_open_seqid(status, res->seqid);
4013 if (!status)
4014 status = decode_stateid(xdr, &res->stateid);
4015 return status;
4016 }
4017
4018 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4019 {
4020 int status;
4021
4022 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4023 if (status != -EIO)
4024 nfs_increment_open_seqid(status, res->seqid);
4025 if (!status)
4026 status = decode_stateid(xdr, &res->stateid);
4027 return status;
4028 }
4029
4030 static int decode_putfh(struct xdr_stream *xdr)
4031 {
4032 return decode_op_hdr(xdr, OP_PUTFH);
4033 }
4034
4035 static int decode_putrootfh(struct xdr_stream *xdr)
4036 {
4037 return decode_op_hdr(xdr, OP_PUTROOTFH);
4038 }
4039
4040 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4041 {
4042 struct kvec *iov = req->rq_rcv_buf.head;
4043 __be32 *p;
4044 uint32_t count, eof, recvd, hdrlen;
4045 int status;
4046
4047 status = decode_op_hdr(xdr, OP_READ);
4048 if (status)
4049 return status;
4050 p = xdr_inline_decode(xdr, 8);
4051 if (unlikely(!p))
4052 goto out_overflow;
4053 eof = be32_to_cpup(p++);
4054 count = be32_to_cpup(p);
4055 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4056 recvd = req->rq_rcv_buf.len - hdrlen;
4057 if (count > recvd) {
4058 dprintk("NFS: server cheating in read reply: "
4059 "count %u > recvd %u\n", count, recvd);
4060 count = recvd;
4061 eof = 0;
4062 }
4063 xdr_read_pages(xdr, count);
4064 res->eof = eof;
4065 res->count = count;
4066 return 0;
4067 out_overflow:
4068 print_overflow_msg(__func__, xdr);
4069 return -EIO;
4070 }
4071
4072 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4073 {
4074 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4075 struct page *page = *rcvbuf->pages;
4076 struct kvec *iov = rcvbuf->head;
4077 size_t hdrlen;
4078 u32 recvd, pglen = rcvbuf->page_len;
4079 __be32 *end, *entry, *p, *kaddr;
4080 unsigned int nr = 0;
4081 int status;
4082
4083 status = decode_op_hdr(xdr, OP_READDIR);
4084 if (!status)
4085 status = decode_verifier(xdr, readdir->verifier.data);
4086 if (unlikely(status))
4087 return status;
4088 dprintk("%s: verifier = %08x:%08x\n",
4089 __func__,
4090 ((u32 *)readdir->verifier.data)[0],
4091 ((u32 *)readdir->verifier.data)[1]);
4092
4093
4094 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4095 recvd = rcvbuf->len - hdrlen;
4096 if (pglen > recvd)
4097 pglen = recvd;
4098 xdr_read_pages(xdr, pglen);
4099
4100 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4101 kaddr = p = kmap_atomic(page, KM_USER0);
4102 end = p + ((pglen + readdir->pgbase) >> 2);
4103 entry = p;
4104
4105 /* Make sure the packet actually has a value_follows and EOF entry */
4106 if ((entry + 1) > end)
4107 goto short_pkt;
4108
4109 for (; *p++; nr++) {
4110 u32 len, attrlen, xlen;
4111 if (end - p < 3)
4112 goto short_pkt;
4113 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4114 p += 2; /* cookie */
4115 len = ntohl(*p++); /* filename length */
4116 if (len > NFS4_MAXNAMLEN) {
4117 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4118 len);
4119 goto err_unmap;
4120 }
4121 xlen = XDR_QUADLEN(len);
4122 if (end - p < xlen + 1)
4123 goto short_pkt;
4124 dprintk("filename = %*s\n", len, (char *)p);
4125 p += xlen;
4126 len = ntohl(*p++); /* bitmap length */
4127 if (end - p < len + 1)
4128 goto short_pkt;
4129 p += len;
4130 attrlen = XDR_QUADLEN(ntohl(*p++));
4131 if (end - p < attrlen + 2)
4132 goto short_pkt;
4133 p += attrlen; /* attributes */
4134 entry = p;
4135 }
4136 /*
4137 * Apparently some server sends responses that are a valid size, but
4138 * contain no entries, and have value_follows==0 and EOF==0. For
4139 * those, just set the EOF marker.
4140 */
4141 if (!nr && entry[1] == 0) {
4142 dprintk("NFS: readdir reply truncated!\n");
4143 entry[1] = 1;
4144 }
4145 out:
4146 kunmap_atomic(kaddr, KM_USER0);
4147 return 0;
4148 short_pkt:
4149 /*
4150 * When we get a short packet there are 2 possibilities. We can
4151 * return an error, or fix up the response to look like a valid
4152 * response and return what we have so far. If there are no
4153 * entries and the packet was short, then return -EIO. If there
4154 * are valid entries in the response, return them and pretend that
4155 * the call was successful, but incomplete. The caller can retry the
4156 * readdir starting at the last cookie.
4157 */
4158 dprintk("%s: short packet at entry %d\n", __func__, nr);
4159 entry[0] = entry[1] = 0;
4160 if (nr)
4161 goto out;
4162 err_unmap:
4163 kunmap_atomic(kaddr, KM_USER0);
4164 return -errno_NFSERR_IO;
4165 }
4166
4167 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4168 {
4169 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4170 struct kvec *iov = rcvbuf->head;
4171 size_t hdrlen;
4172 u32 len, recvd;
4173 __be32 *p;
4174 char *kaddr;
4175 int status;
4176
4177 status = decode_op_hdr(xdr, OP_READLINK);
4178 if (status)
4179 return status;
4180
4181 /* Convert length of symlink */
4182 p = xdr_inline_decode(xdr, 4);
4183 if (unlikely(!p))
4184 goto out_overflow;
4185 len = be32_to_cpup(p);
4186 if (len >= rcvbuf->page_len || len <= 0) {
4187 dprintk("nfs: server returned giant symlink!\n");
4188 return -ENAMETOOLONG;
4189 }
4190 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4191 recvd = req->rq_rcv_buf.len - hdrlen;
4192 if (recvd < len) {
4193 dprintk("NFS: server cheating in readlink reply: "
4194 "count %u > recvd %u\n", len, recvd);
4195 return -EIO;
4196 }
4197 xdr_read_pages(xdr, len);
4198 /*
4199 * The XDR encode routine has set things up so that
4200 * the link text will be copied directly into the
4201 * buffer. We just have to do overflow-checking,
4202 * and and null-terminate the text (the VFS expects
4203 * null-termination).
4204 */
4205 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4206 kaddr[len+rcvbuf->page_base] = '\0';
4207 kunmap_atomic(kaddr, KM_USER0);
4208 return 0;
4209 out_overflow:
4210 print_overflow_msg(__func__, xdr);
4211 return -EIO;
4212 }
4213
4214 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4215 {
4216 int status;
4217
4218 status = decode_op_hdr(xdr, OP_REMOVE);
4219 if (status)
4220 goto out;
4221 status = decode_change_info(xdr, cinfo);
4222 out:
4223 return status;
4224 }
4225
4226 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4227 struct nfs4_change_info *new_cinfo)
4228 {
4229 int status;
4230
4231 status = decode_op_hdr(xdr, OP_RENAME);
4232 if (status)
4233 goto out;
4234 if ((status = decode_change_info(xdr, old_cinfo)))
4235 goto out;
4236 status = decode_change_info(xdr, new_cinfo);
4237 out:
4238 return status;
4239 }
4240
4241 static int decode_renew(struct xdr_stream *xdr)
4242 {
4243 return decode_op_hdr(xdr, OP_RENEW);
4244 }
4245
4246 static int
4247 decode_restorefh(struct xdr_stream *xdr)
4248 {
4249 return decode_op_hdr(xdr, OP_RESTOREFH);
4250 }
4251
4252 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4253 size_t *acl_len)
4254 {
4255 __be32 *savep;
4256 uint32_t attrlen,
4257 bitmap[2] = {0};
4258 struct kvec *iov = req->rq_rcv_buf.head;
4259 int status;
4260
4261 *acl_len = 0;
4262 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4263 goto out;
4264 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4265 goto out;
4266 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4267 goto out;
4268
4269 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4270 return -EIO;
4271 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4272 size_t hdrlen;
4273 u32 recvd;
4274
4275 /* We ignore &savep and don't do consistency checks on
4276 * the attr length. Let userspace figure it out.... */
4277 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4278 recvd = req->rq_rcv_buf.len - hdrlen;
4279 if (attrlen > recvd) {
4280 dprintk("NFS: server cheating in getattr"
4281 " acl reply: attrlen %u > recvd %u\n",
4282 attrlen, recvd);
4283 return -EINVAL;
4284 }
4285 xdr_read_pages(xdr, attrlen);
4286 *acl_len = attrlen;
4287 } else
4288 status = -EOPNOTSUPP;
4289
4290 out:
4291 return status;
4292 }
4293
4294 static int
4295 decode_savefh(struct xdr_stream *xdr)
4296 {
4297 return decode_op_hdr(xdr, OP_SAVEFH);
4298 }
4299
4300 static int decode_setattr(struct xdr_stream *xdr)
4301 {
4302 __be32 *p;
4303 uint32_t bmlen;
4304 int status;
4305
4306 status = decode_op_hdr(xdr, OP_SETATTR);
4307 if (status)
4308 return status;
4309 p = xdr_inline_decode(xdr, 4);
4310 if (unlikely(!p))
4311 goto out_overflow;
4312 bmlen = be32_to_cpup(p);
4313 p = xdr_inline_decode(xdr, bmlen << 2);
4314 if (likely(p))
4315 return 0;
4316 out_overflow:
4317 print_overflow_msg(__func__, xdr);
4318 return -EIO;
4319 }
4320
4321 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4322 {
4323 __be32 *p;
4324 uint32_t opnum;
4325 int32_t nfserr;
4326
4327 p = xdr_inline_decode(xdr, 8);
4328 if (unlikely(!p))
4329 goto out_overflow;
4330 opnum = be32_to_cpup(p++);
4331 if (opnum != OP_SETCLIENTID) {
4332 dprintk("nfs: decode_setclientid: Server returned operation"
4333 " %d\n", opnum);
4334 return -EIO;
4335 }
4336 nfserr = be32_to_cpup(p);
4337 if (nfserr == NFS_OK) {
4338 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4339 if (unlikely(!p))
4340 goto out_overflow;
4341 p = xdr_decode_hyper(p, &clp->cl_clientid);
4342 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4343 } else if (nfserr == NFSERR_CLID_INUSE) {
4344 uint32_t len;
4345
4346 /* skip netid string */
4347 p = xdr_inline_decode(xdr, 4);
4348 if (unlikely(!p))
4349 goto out_overflow;
4350 len = be32_to_cpup(p);
4351 p = xdr_inline_decode(xdr, len);
4352 if (unlikely(!p))
4353 goto out_overflow;
4354
4355 /* skip uaddr string */
4356 p = xdr_inline_decode(xdr, 4);
4357 if (unlikely(!p))
4358 goto out_overflow;
4359 len = be32_to_cpup(p);
4360 p = xdr_inline_decode(xdr, len);
4361 if (unlikely(!p))
4362 goto out_overflow;
4363 return -NFSERR_CLID_INUSE;
4364 } else
4365 return nfs4_stat_to_errno(nfserr);
4366
4367 return 0;
4368 out_overflow:
4369 print_overflow_msg(__func__, xdr);
4370 return -EIO;
4371 }
4372
4373 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4374 {
4375 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4376 }
4377
4378 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4379 {
4380 __be32 *p;
4381 int status;
4382
4383 status = decode_op_hdr(xdr, OP_WRITE);
4384 if (status)
4385 return status;
4386
4387 p = xdr_inline_decode(xdr, 16);
4388 if (unlikely(!p))
4389 goto out_overflow;
4390 res->count = be32_to_cpup(p++);
4391 res->verf->committed = be32_to_cpup(p++);
4392 memcpy(res->verf->verifier, p, 8);
4393 return 0;
4394 out_overflow:
4395 print_overflow_msg(__func__, xdr);
4396 return -EIO;
4397 }
4398
4399 static int decode_delegreturn(struct xdr_stream *xdr)
4400 {
4401 return decode_op_hdr(xdr, OP_DELEGRETURN);
4402 }
4403
4404 #if defined(CONFIG_NFS_V4_1)
4405 static int decode_exchange_id(struct xdr_stream *xdr,
4406 struct nfs41_exchange_id_res *res)
4407 {
4408 __be32 *p;
4409 uint32_t dummy;
4410 char *dummy_str;
4411 int status;
4412 struct nfs_client *clp = res->client;
4413
4414 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4415 if (status)
4416 return status;
4417
4418 p = xdr_inline_decode(xdr, 8);
4419 if (unlikely(!p))
4420 goto out_overflow;
4421 xdr_decode_hyper(p, &clp->cl_ex_clid);
4422 p = xdr_inline_decode(xdr, 12);
4423 if (unlikely(!p))
4424 goto out_overflow;
4425 clp->cl_seqid = be32_to_cpup(p++);
4426 clp->cl_exchange_flags = be32_to_cpup(p++);
4427
4428 /* We ask for SP4_NONE */
4429 dummy = be32_to_cpup(p);
4430 if (dummy != SP4_NONE)
4431 return -EIO;
4432
4433 /* Throw away minor_id */
4434 p = xdr_inline_decode(xdr, 8);
4435 if (unlikely(!p))
4436 goto out_overflow;
4437
4438 /* Throw away Major id */
4439 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4440 if (unlikely(status))
4441 return status;
4442
4443 /* Throw away server_scope */
4444 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4445 if (unlikely(status))
4446 return status;
4447
4448 /* Throw away Implementation id array */
4449 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4450 if (unlikely(status))
4451 return status;
4452
4453 return 0;
4454 out_overflow:
4455 print_overflow_msg(__func__, xdr);
4456 return -EIO;
4457 }
4458
4459 static int decode_chan_attrs(struct xdr_stream *xdr,
4460 struct nfs4_channel_attrs *attrs)
4461 {
4462 __be32 *p;
4463 u32 nr_attrs;
4464
4465 p = xdr_inline_decode(xdr, 28);
4466 if (unlikely(!p))
4467 goto out_overflow;
4468 attrs->headerpadsz = be32_to_cpup(p++);
4469 attrs->max_rqst_sz = be32_to_cpup(p++);
4470 attrs->max_resp_sz = be32_to_cpup(p++);
4471 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4472 attrs->max_ops = be32_to_cpup(p++);
4473 attrs->max_reqs = be32_to_cpup(p++);
4474 nr_attrs = be32_to_cpup(p);
4475 if (unlikely(nr_attrs > 1)) {
4476 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4477 __func__, nr_attrs);
4478 return -EINVAL;
4479 }
4480 if (nr_attrs == 1) {
4481 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4482 if (unlikely(!p))
4483 goto out_overflow;
4484 }
4485 return 0;
4486 out_overflow:
4487 print_overflow_msg(__func__, xdr);
4488 return -EIO;
4489 }
4490
4491 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4492 {
4493 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4494 }
4495
4496 static int decode_create_session(struct xdr_stream *xdr,
4497 struct nfs41_create_session_res *res)
4498 {
4499 __be32 *p;
4500 int status;
4501 struct nfs_client *clp = res->client;
4502 struct nfs4_session *session = clp->cl_session;
4503
4504 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4505 if (!status)
4506 status = decode_sessionid(xdr, &session->sess_id);
4507 if (unlikely(status))
4508 return status;
4509
4510 /* seqid, flags */
4511 p = xdr_inline_decode(xdr, 8);
4512 if (unlikely(!p))
4513 goto out_overflow;
4514 clp->cl_seqid = be32_to_cpup(p++);
4515 session->flags = be32_to_cpup(p);
4516
4517 /* Channel attributes */
4518 status = decode_chan_attrs(xdr, &session->fc_attrs);
4519 if (!status)
4520 status = decode_chan_attrs(xdr, &session->bc_attrs);
4521 return status;
4522 out_overflow:
4523 print_overflow_msg(__func__, xdr);
4524 return -EIO;
4525 }
4526
4527 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4528 {
4529 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4530 }
4531 #endif /* CONFIG_NFS_V4_1 */
4532
4533 static int decode_sequence(struct xdr_stream *xdr,
4534 struct nfs4_sequence_res *res,
4535 struct rpc_rqst *rqstp)
4536 {
4537 #if defined(CONFIG_NFS_V4_1)
4538 struct nfs4_slot *slot;
4539 struct nfs4_sessionid id;
4540 u32 dummy;
4541 int status;
4542 __be32 *p;
4543
4544 if (!res->sr_session)
4545 return 0;
4546
4547 status = decode_op_hdr(xdr, OP_SEQUENCE);
4548 if (!status)
4549 status = decode_sessionid(xdr, &id);
4550 if (unlikely(status))
4551 goto out_err;
4552
4553 /*
4554 * If the server returns different values for sessionID, slotID or
4555 * sequence number, the server is looney tunes.
4556 */
4557 status = -ESERVERFAULT;
4558
4559 if (memcmp(id.data, res->sr_session->sess_id.data,
4560 NFS4_MAX_SESSIONID_LEN)) {
4561 dprintk("%s Invalid session id\n", __func__);
4562 goto out_err;
4563 }
4564
4565 p = xdr_inline_decode(xdr, 20);
4566 if (unlikely(!p))
4567 goto out_overflow;
4568
4569 /* seqid */
4570 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4571 dummy = be32_to_cpup(p++);
4572 if (dummy != slot->seq_nr) {
4573 dprintk("%s Invalid sequence number\n", __func__);
4574 goto out_err;
4575 }
4576 /* slot id */
4577 dummy = be32_to_cpup(p++);
4578 if (dummy != res->sr_slotid) {
4579 dprintk("%s Invalid slot id\n", __func__);
4580 goto out_err;
4581 }
4582 /* highest slot id - currently not processed */
4583 dummy = be32_to_cpup(p++);
4584 /* target highest slot id - currently not processed */
4585 dummy = be32_to_cpup(p++);
4586 /* result flags - currently not processed */
4587 dummy = be32_to_cpup(p);
4588 status = 0;
4589 out_err:
4590 res->sr_status = status;
4591 return status;
4592 out_overflow:
4593 print_overflow_msg(__func__, xdr);
4594 status = -EIO;
4595 goto out_err;
4596 #else /* CONFIG_NFS_V4_1 */
4597 return 0;
4598 #endif /* CONFIG_NFS_V4_1 */
4599 }
4600
4601 /*
4602 * END OF "GENERIC" DECODE ROUTINES.
4603 */
4604
4605 /*
4606 * Decode OPEN_DOWNGRADE response
4607 */
4608 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4609 {
4610 struct xdr_stream xdr;
4611 struct compound_hdr hdr;
4612 int status;
4613
4614 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4615 status = decode_compound_hdr(&xdr, &hdr);
4616 if (status)
4617 goto out;
4618 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4619 if (status)
4620 goto out;
4621 status = decode_putfh(&xdr);
4622 if (status)
4623 goto out;
4624 status = decode_open_downgrade(&xdr, res);
4625 if (status != 0)
4626 goto out;
4627 decode_getfattr(&xdr, res->fattr, res->server,
4628 !RPC_IS_ASYNC(rqstp->rq_task));
4629 out:
4630 return status;
4631 }
4632
4633 /*
4634 * Decode ACCESS response
4635 */
4636 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4637 {
4638 struct xdr_stream xdr;
4639 struct compound_hdr hdr;
4640 int status;
4641
4642 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4643 status = decode_compound_hdr(&xdr, &hdr);
4644 if (status)
4645 goto out;
4646 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4647 if (status)
4648 goto out;
4649 status = decode_putfh(&xdr);
4650 if (status != 0)
4651 goto out;
4652 status = decode_access(&xdr, res);
4653 if (status != 0)
4654 goto out;
4655 decode_getfattr(&xdr, res->fattr, res->server,
4656 !RPC_IS_ASYNC(rqstp->rq_task));
4657 out:
4658 return status;
4659 }
4660
4661 /*
4662 * Decode LOOKUP response
4663 */
4664 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4665 {
4666 struct xdr_stream xdr;
4667 struct compound_hdr hdr;
4668 int status;
4669
4670 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4671 status = decode_compound_hdr(&xdr, &hdr);
4672 if (status)
4673 goto out;
4674 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4675 if (status)
4676 goto out;
4677 if ((status = decode_putfh(&xdr)) != 0)
4678 goto out;
4679 if ((status = decode_lookup(&xdr)) != 0)
4680 goto out;
4681 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4682 goto out;
4683 status = decode_getfattr(&xdr, res->fattr, res->server
4684 ,!RPC_IS_ASYNC(rqstp->rq_task));
4685 out:
4686 return status;
4687 }
4688
4689 /*
4690 * Decode LOOKUP_ROOT response
4691 */
4692 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4693 {
4694 struct xdr_stream xdr;
4695 struct compound_hdr hdr;
4696 int status;
4697
4698 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4699 status = decode_compound_hdr(&xdr, &hdr);
4700 if (status)
4701 goto out;
4702 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4703 if (status)
4704 goto out;
4705 if ((status = decode_putrootfh(&xdr)) != 0)
4706 goto out;
4707 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4708 status = decode_getfattr(&xdr, res->fattr, res->server,
4709 !RPC_IS_ASYNC(rqstp->rq_task));
4710 out:
4711 return status;
4712 }
4713
4714 /*
4715 * Decode REMOVE response
4716 */
4717 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4718 {
4719 struct xdr_stream xdr;
4720 struct compound_hdr hdr;
4721 int status;
4722
4723 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4724 status = decode_compound_hdr(&xdr, &hdr);
4725 if (status)
4726 goto out;
4727 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4728 if (status)
4729 goto out;
4730 if ((status = decode_putfh(&xdr)) != 0)
4731 goto out;
4732 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4733 goto out;
4734 decode_getfattr(&xdr, &res->dir_attr, res->server,
4735 !RPC_IS_ASYNC(rqstp->rq_task));
4736 out:
4737 return status;
4738 }
4739
4740 /*
4741 * Decode RENAME response
4742 */
4743 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4744 {
4745 struct xdr_stream xdr;
4746 struct compound_hdr hdr;
4747 int status;
4748
4749 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4750 status = decode_compound_hdr(&xdr, &hdr);
4751 if (status)
4752 goto out;
4753 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4754 if (status)
4755 goto out;
4756 if ((status = decode_putfh(&xdr)) != 0)
4757 goto out;
4758 if ((status = decode_savefh(&xdr)) != 0)
4759 goto out;
4760 if ((status = decode_putfh(&xdr)) != 0)
4761 goto out;
4762 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4763 goto out;
4764 /* Current FH is target directory */
4765 if (decode_getfattr(&xdr, res->new_fattr, res->server,
4766 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4767 goto out;
4768 if ((status = decode_restorefh(&xdr)) != 0)
4769 goto out;
4770 decode_getfattr(&xdr, res->old_fattr, res->server,
4771 !RPC_IS_ASYNC(rqstp->rq_task));
4772 out:
4773 return status;
4774 }
4775
4776 /*
4777 * Decode LINK response
4778 */
4779 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4780 {
4781 struct xdr_stream xdr;
4782 struct compound_hdr hdr;
4783 int status;
4784
4785 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4786 status = decode_compound_hdr(&xdr, &hdr);
4787 if (status)
4788 goto out;
4789 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4790 if (status)
4791 goto out;
4792 if ((status = decode_putfh(&xdr)) != 0)
4793 goto out;
4794 if ((status = decode_savefh(&xdr)) != 0)
4795 goto out;
4796 if ((status = decode_putfh(&xdr)) != 0)
4797 goto out;
4798 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4799 goto out;
4800 /*
4801 * Note order: OP_LINK leaves the directory as the current
4802 * filehandle.
4803 */
4804 if (decode_getfattr(&xdr, res->dir_attr, res->server,
4805 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4806 goto out;
4807 if ((status = decode_restorefh(&xdr)) != 0)
4808 goto out;
4809 decode_getfattr(&xdr, res->fattr, res->server,
4810 !RPC_IS_ASYNC(rqstp->rq_task));
4811 out:
4812 return status;
4813 }
4814
4815 /*
4816 * Decode CREATE response
4817 */
4818 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4819 {
4820 struct xdr_stream xdr;
4821 struct compound_hdr hdr;
4822 int status;
4823
4824 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4825 status = decode_compound_hdr(&xdr, &hdr);
4826 if (status)
4827 goto out;
4828 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4829 if (status)
4830 goto out;
4831 if ((status = decode_putfh(&xdr)) != 0)
4832 goto out;
4833 if ((status = decode_savefh(&xdr)) != 0)
4834 goto out;
4835 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4836 goto out;
4837 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4838 goto out;
4839 if (decode_getfattr(&xdr, res->fattr, res->server,
4840 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4841 goto out;
4842 if ((status = decode_restorefh(&xdr)) != 0)
4843 goto out;
4844 decode_getfattr(&xdr, res->dir_fattr, res->server,
4845 !RPC_IS_ASYNC(rqstp->rq_task));
4846 out:
4847 return status;
4848 }
4849
4850 /*
4851 * Decode SYMLINK response
4852 */
4853 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4854 {
4855 return nfs4_xdr_dec_create(rqstp, p, res);
4856 }
4857
4858 /*
4859 * Decode GETATTR response
4860 */
4861 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4862 {
4863 struct xdr_stream xdr;
4864 struct compound_hdr hdr;
4865 int status;
4866
4867 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4868 status = decode_compound_hdr(&xdr, &hdr);
4869 if (status)
4870 goto out;
4871 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4872 if (status)
4873 goto out;
4874 status = decode_putfh(&xdr);
4875 if (status)
4876 goto out;
4877 status = decode_getfattr(&xdr, res->fattr, res->server,
4878 !RPC_IS_ASYNC(rqstp->rq_task));
4879 out:
4880 return status;
4881 }
4882
4883 /*
4884 * Encode an SETACL request
4885 */
4886 static int
4887 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4888 {
4889 struct xdr_stream xdr;
4890 struct compound_hdr hdr = {
4891 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4892 };
4893 int status;
4894
4895 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4896 encode_compound_hdr(&xdr, req, &hdr);
4897 encode_sequence(&xdr, &args->seq_args, &hdr);
4898 encode_putfh(&xdr, args->fh, &hdr);
4899 status = encode_setacl(&xdr, args, &hdr);
4900 encode_nops(&hdr);
4901 return status;
4902 }
4903
4904 /*
4905 * Decode SETACL response
4906 */
4907 static int
4908 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4909 struct nfs_setaclres *res)
4910 {
4911 struct xdr_stream xdr;
4912 struct compound_hdr hdr;
4913 int status;
4914
4915 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4916 status = decode_compound_hdr(&xdr, &hdr);
4917 if (status)
4918 goto out;
4919 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4920 if (status)
4921 goto out;
4922 status = decode_putfh(&xdr);
4923 if (status)
4924 goto out;
4925 status = decode_setattr(&xdr);
4926 out:
4927 return status;
4928 }
4929
4930 /*
4931 * Decode GETACL response
4932 */
4933 static int
4934 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4935 struct nfs_getaclres *res)
4936 {
4937 struct xdr_stream xdr;
4938 struct compound_hdr hdr;
4939 int status;
4940
4941 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4942 status = decode_compound_hdr(&xdr, &hdr);
4943 if (status)
4944 goto out;
4945 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4946 if (status)
4947 goto out;
4948 status = decode_putfh(&xdr);
4949 if (status)
4950 goto out;
4951 status = decode_getacl(&xdr, rqstp, &res->acl_len);
4952
4953 out:
4954 return status;
4955 }
4956
4957 /*
4958 * Decode CLOSE response
4959 */
4960 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4961 {
4962 struct xdr_stream xdr;
4963 struct compound_hdr hdr;
4964 int status;
4965
4966 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4967 status = decode_compound_hdr(&xdr, &hdr);
4968 if (status)
4969 goto out;
4970 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4971 if (status)
4972 goto out;
4973 status = decode_putfh(&xdr);
4974 if (status)
4975 goto out;
4976 status = decode_close(&xdr, res);
4977 if (status != 0)
4978 goto out;
4979 /*
4980 * Note: Server may do delete on close for this file
4981 * in which case the getattr call will fail with
4982 * an ESTALE error. Shouldn't be a problem,
4983 * though, since fattr->valid will remain unset.
4984 */
4985 decode_getfattr(&xdr, res->fattr, res->server,
4986 !RPC_IS_ASYNC(rqstp->rq_task));
4987 out:
4988 return status;
4989 }
4990
4991 /*
4992 * Decode OPEN response
4993 */
4994 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4995 {
4996 struct xdr_stream xdr;
4997 struct compound_hdr hdr;
4998 int status;
4999
5000 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5001 status = decode_compound_hdr(&xdr, &hdr);
5002 if (status)
5003 goto out;
5004 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5005 if (status)
5006 goto out;
5007 status = decode_putfh(&xdr);
5008 if (status)
5009 goto out;
5010 status = decode_savefh(&xdr);
5011 if (status)
5012 goto out;
5013 status = decode_open(&xdr, res);
5014 if (status)
5015 goto out;
5016 if (decode_getfh(&xdr, &res->fh) != 0)
5017 goto out;
5018 if (decode_getfattr(&xdr, res->f_attr, res->server,
5019 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5020 goto out;
5021 if (decode_restorefh(&xdr) != 0)
5022 goto out;
5023 decode_getfattr(&xdr, res->dir_attr, res->server,
5024 !RPC_IS_ASYNC(rqstp->rq_task));
5025 out:
5026 return status;
5027 }
5028
5029 /*
5030 * Decode OPEN_CONFIRM response
5031 */
5032 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5033 {
5034 struct xdr_stream xdr;
5035 struct compound_hdr hdr;
5036 int status;
5037
5038 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5039 status = decode_compound_hdr(&xdr, &hdr);
5040 if (status)
5041 goto out;
5042 status = decode_putfh(&xdr);
5043 if (status)
5044 goto out;
5045 status = decode_open_confirm(&xdr, res);
5046 out:
5047 return status;
5048 }
5049
5050 /*
5051 * Decode OPEN response
5052 */
5053 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5054 {
5055 struct xdr_stream xdr;
5056 struct compound_hdr hdr;
5057 int status;
5058
5059 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5060 status = decode_compound_hdr(&xdr, &hdr);
5061 if (status)
5062 goto out;
5063 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5064 if (status)
5065 goto out;
5066 status = decode_putfh(&xdr);
5067 if (status)
5068 goto out;
5069 status = decode_open(&xdr, res);
5070 if (status)
5071 goto out;
5072 decode_getfattr(&xdr, res->f_attr, res->server,
5073 !RPC_IS_ASYNC(rqstp->rq_task));
5074 out:
5075 return status;
5076 }
5077
5078 /*
5079 * Decode SETATTR response
5080 */
5081 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5082 {
5083 struct xdr_stream xdr;
5084 struct compound_hdr hdr;
5085 int status;
5086
5087 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5088 status = decode_compound_hdr(&xdr, &hdr);
5089 if (status)
5090 goto out;
5091 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5092 if (status)
5093 goto out;
5094 status = decode_putfh(&xdr);
5095 if (status)
5096 goto out;
5097 status = decode_setattr(&xdr);
5098 if (status)
5099 goto out;
5100 decode_getfattr(&xdr, res->fattr, res->server,
5101 !RPC_IS_ASYNC(rqstp->rq_task));
5102 out:
5103 return status;
5104 }
5105
5106 /*
5107 * Decode LOCK response
5108 */
5109 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5110 {
5111 struct xdr_stream xdr;
5112 struct compound_hdr hdr;
5113 int status;
5114
5115 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5116 status = decode_compound_hdr(&xdr, &hdr);
5117 if (status)
5118 goto out;
5119 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5120 if (status)
5121 goto out;
5122 status = decode_putfh(&xdr);
5123 if (status)
5124 goto out;
5125 status = decode_lock(&xdr, res);
5126 out:
5127 return status;
5128 }
5129
5130 /*
5131 * Decode LOCKT response
5132 */
5133 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5134 {
5135 struct xdr_stream xdr;
5136 struct compound_hdr hdr;
5137 int status;
5138
5139 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5140 status = decode_compound_hdr(&xdr, &hdr);
5141 if (status)
5142 goto out;
5143 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5144 if (status)
5145 goto out;
5146 status = decode_putfh(&xdr);
5147 if (status)
5148 goto out;
5149 status = decode_lockt(&xdr, res);
5150 out:
5151 return status;
5152 }
5153
5154 /*
5155 * Decode LOCKU response
5156 */
5157 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5158 {
5159 struct xdr_stream xdr;
5160 struct compound_hdr hdr;
5161 int status;
5162
5163 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5164 status = decode_compound_hdr(&xdr, &hdr);
5165 if (status)
5166 goto out;
5167 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5168 if (status)
5169 goto out;
5170 status = decode_putfh(&xdr);
5171 if (status)
5172 goto out;
5173 status = decode_locku(&xdr, res);
5174 out:
5175 return status;
5176 }
5177
5178 /*
5179 * Decode READLINK response
5180 */
5181 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5182 struct nfs4_readlink_res *res)
5183 {
5184 struct xdr_stream xdr;
5185 struct compound_hdr hdr;
5186 int status;
5187
5188 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5189 status = decode_compound_hdr(&xdr, &hdr);
5190 if (status)
5191 goto out;
5192 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5193 if (status)
5194 goto out;
5195 status = decode_putfh(&xdr);
5196 if (status)
5197 goto out;
5198 status = decode_readlink(&xdr, rqstp);
5199 out:
5200 return status;
5201 }
5202
5203 /*
5204 * Decode READDIR response
5205 */
5206 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5207 {
5208 struct xdr_stream xdr;
5209 struct compound_hdr hdr;
5210 int status;
5211
5212 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5213 status = decode_compound_hdr(&xdr, &hdr);
5214 if (status)
5215 goto out;
5216 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5217 if (status)
5218 goto out;
5219 status = decode_putfh(&xdr);
5220 if (status)
5221 goto out;
5222 status = decode_readdir(&xdr, rqstp, res);
5223 out:
5224 return status;
5225 }
5226
5227 /*
5228 * Decode Read response
5229 */
5230 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5231 {
5232 struct xdr_stream xdr;
5233 struct compound_hdr hdr;
5234 int status;
5235
5236 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5237 status = decode_compound_hdr(&xdr, &hdr);
5238 if (status)
5239 goto out;
5240 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5241 if (status)
5242 goto out;
5243 status = decode_putfh(&xdr);
5244 if (status)
5245 goto out;
5246 status = decode_read(&xdr, rqstp, res);
5247 if (!status)
5248 status = res->count;
5249 out:
5250 return status;
5251 }
5252
5253 /*
5254 * Decode WRITE response
5255 */
5256 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5257 {
5258 struct xdr_stream xdr;
5259 struct compound_hdr hdr;
5260 int status;
5261
5262 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5263 status = decode_compound_hdr(&xdr, &hdr);
5264 if (status)
5265 goto out;
5266 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5267 if (status)
5268 goto out;
5269 status = decode_putfh(&xdr);
5270 if (status)
5271 goto out;
5272 status = decode_write(&xdr, res);
5273 if (status)
5274 goto out;
5275 decode_getfattr(&xdr, res->fattr, res->server,
5276 !RPC_IS_ASYNC(rqstp->rq_task));
5277 if (!status)
5278 status = res->count;
5279 out:
5280 return status;
5281 }
5282
5283 /*
5284 * Decode COMMIT response
5285 */
5286 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5287 {
5288 struct xdr_stream xdr;
5289 struct compound_hdr hdr;
5290 int status;
5291
5292 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5293 status = decode_compound_hdr(&xdr, &hdr);
5294 if (status)
5295 goto out;
5296 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5297 if (status)
5298 goto out;
5299 status = decode_putfh(&xdr);
5300 if (status)
5301 goto out;
5302 status = decode_commit(&xdr, res);
5303 if (status)
5304 goto out;
5305 decode_getfattr(&xdr, res->fattr, res->server,
5306 !RPC_IS_ASYNC(rqstp->rq_task));
5307 out:
5308 return status;
5309 }
5310
5311 /*
5312 * FSINFO request
5313 */
5314 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5315 struct nfs4_fsinfo_res *res)
5316 {
5317 struct xdr_stream xdr;
5318 struct compound_hdr hdr;
5319 int status;
5320
5321 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5322 status = decode_compound_hdr(&xdr, &hdr);
5323 if (!status)
5324 status = decode_sequence(&xdr, &res->seq_res, req);
5325 if (!status)
5326 status = decode_putfh(&xdr);
5327 if (!status)
5328 status = decode_fsinfo(&xdr, res->fsinfo);
5329 return status;
5330 }
5331
5332 /*
5333 * PATHCONF request
5334 */
5335 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5336 struct nfs4_pathconf_res *res)
5337 {
5338 struct xdr_stream xdr;
5339 struct compound_hdr hdr;
5340 int status;
5341
5342 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5343 status = decode_compound_hdr(&xdr, &hdr);
5344 if (!status)
5345 status = decode_sequence(&xdr, &res->seq_res, req);
5346 if (!status)
5347 status = decode_putfh(&xdr);
5348 if (!status)
5349 status = decode_pathconf(&xdr, res->pathconf);
5350 return status;
5351 }
5352
5353 /*
5354 * STATFS request
5355 */
5356 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5357 struct nfs4_statfs_res *res)
5358 {
5359 struct xdr_stream xdr;
5360 struct compound_hdr hdr;
5361 int status;
5362
5363 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5364 status = decode_compound_hdr(&xdr, &hdr);
5365 if (!status)
5366 status = decode_sequence(&xdr, &res->seq_res, req);
5367 if (!status)
5368 status = decode_putfh(&xdr);
5369 if (!status)
5370 status = decode_statfs(&xdr, res->fsstat);
5371 return status;
5372 }
5373
5374 /*
5375 * GETATTR_BITMAP request
5376 */
5377 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5378 {
5379 struct xdr_stream xdr;
5380 struct compound_hdr hdr;
5381 int status;
5382
5383 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5384 status = decode_compound_hdr(&xdr, &hdr);
5385 if (status)
5386 goto out;
5387 status = decode_sequence(&xdr, &res->seq_res, req);
5388 if (status)
5389 goto out;
5390 if ((status = decode_putfh(&xdr)) != 0)
5391 goto out;
5392 status = decode_server_caps(&xdr, res);
5393 out:
5394 return status;
5395 }
5396
5397 /*
5398 * Decode RENEW response
5399 */
5400 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5401 {
5402 struct xdr_stream xdr;
5403 struct compound_hdr hdr;
5404 int status;
5405
5406 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5407 status = decode_compound_hdr(&xdr, &hdr);
5408 if (!status)
5409 status = decode_renew(&xdr);
5410 return status;
5411 }
5412
5413 /*
5414 * a SETCLIENTID request
5415 */
5416 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5417 struct nfs_client *clp)
5418 {
5419 struct xdr_stream xdr;
5420 struct compound_hdr hdr;
5421 int status;
5422
5423 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5424 status = decode_compound_hdr(&xdr, &hdr);
5425 if (!status)
5426 status = decode_setclientid(&xdr, clp);
5427 return status;
5428 }
5429
5430 /*
5431 * a SETCLIENTID_CONFIRM request
5432 */
5433 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5434 {
5435 struct xdr_stream xdr;
5436 struct compound_hdr hdr;
5437 int status;
5438
5439 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5440 status = decode_compound_hdr(&xdr, &hdr);
5441 if (!status)
5442 status = decode_setclientid_confirm(&xdr);
5443 if (!status)
5444 status = decode_putrootfh(&xdr);
5445 if (!status)
5446 status = decode_fsinfo(&xdr, fsinfo);
5447 return status;
5448 }
5449
5450 /*
5451 * DELEGRETURN request
5452 */
5453 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5454 {
5455 struct xdr_stream xdr;
5456 struct compound_hdr hdr;
5457 int status;
5458
5459 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5460 status = decode_compound_hdr(&xdr, &hdr);
5461 if (status)
5462 goto out;
5463 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5464 if (status)
5465 goto out;
5466 status = decode_putfh(&xdr);
5467 if (status != 0)
5468 goto out;
5469 status = decode_delegreturn(&xdr);
5470 decode_getfattr(&xdr, res->fattr, res->server,
5471 !RPC_IS_ASYNC(rqstp->rq_task));
5472 out:
5473 return status;
5474 }
5475
5476 /*
5477 * FS_LOCATIONS request
5478 */
5479 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5480 struct nfs4_fs_locations_res *res)
5481 {
5482 struct xdr_stream xdr;
5483 struct compound_hdr hdr;
5484 int status;
5485
5486 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5487 status = decode_compound_hdr(&xdr, &hdr);
5488 if (status)
5489 goto out;
5490 status = decode_sequence(&xdr, &res->seq_res, req);
5491 if (status)
5492 goto out;
5493 if ((status = decode_putfh(&xdr)) != 0)
5494 goto out;
5495 if ((status = decode_lookup(&xdr)) != 0)
5496 goto out;
5497 xdr_enter_page(&xdr, PAGE_SIZE);
5498 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5499 res->fs_locations->server,
5500 !RPC_IS_ASYNC(req->rq_task));
5501 out:
5502 return status;
5503 }
5504
5505 #if defined(CONFIG_NFS_V4_1)
5506 /*
5507 * EXCHANGE_ID request
5508 */
5509 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5510 void *res)
5511 {
5512 struct xdr_stream xdr;
5513 struct compound_hdr hdr;
5514 int status;
5515
5516 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5517 status = decode_compound_hdr(&xdr, &hdr);
5518 if (!status)
5519 status = decode_exchange_id(&xdr, res);
5520 return status;
5521 }
5522
5523 /*
5524 * a CREATE_SESSION request
5525 */
5526 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5527 struct nfs41_create_session_res *res)
5528 {
5529 struct xdr_stream xdr;
5530 struct compound_hdr hdr;
5531 int status;
5532
5533 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5534 status = decode_compound_hdr(&xdr, &hdr);
5535 if (!status)
5536 status = decode_create_session(&xdr, res);
5537 return status;
5538 }
5539
5540 /*
5541 * a DESTROY_SESSION request
5542 */
5543 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5544 void *dummy)
5545 {
5546 struct xdr_stream xdr;
5547 struct compound_hdr hdr;
5548 int status;
5549
5550 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5551 status = decode_compound_hdr(&xdr, &hdr);
5552 if (!status)
5553 status = decode_destroy_session(&xdr, dummy);
5554 return status;
5555 }
5556
5557 /*
5558 * a SEQUENCE request
5559 */
5560 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5561 struct nfs4_sequence_res *res)
5562 {
5563 struct xdr_stream xdr;
5564 struct compound_hdr hdr;
5565 int status;
5566
5567 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5568 status = decode_compound_hdr(&xdr, &hdr);
5569 if (!status)
5570 status = decode_sequence(&xdr, res, rqstp);
5571 return status;
5572 }
5573
5574 /*
5575 * a GET_LEASE_TIME request
5576 */
5577 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5578 struct nfs4_get_lease_time_res *res)
5579 {
5580 struct xdr_stream xdr;
5581 struct compound_hdr hdr;
5582 int status;
5583
5584 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5585 status = decode_compound_hdr(&xdr, &hdr);
5586 if (!status)
5587 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5588 if (!status)
5589 status = decode_putrootfh(&xdr);
5590 if (!status)
5591 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5592 return status;
5593 }
5594 #endif /* CONFIG_NFS_V4_1 */
5595
5596 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5597 {
5598 uint32_t bitmap[2] = {0};
5599 uint32_t len;
5600
5601 if (!*p++) {
5602 if (!*p)
5603 return ERR_PTR(-EAGAIN);
5604 entry->eof = 1;
5605 return ERR_PTR(-EBADCOOKIE);
5606 }
5607
5608 entry->prev_cookie = entry->cookie;
5609 p = xdr_decode_hyper(p, &entry->cookie);
5610 entry->len = ntohl(*p++);
5611 entry->name = (const char *) p;
5612 p += XDR_QUADLEN(entry->len);
5613
5614 /*
5615 * In case the server doesn't return an inode number,
5616 * we fake one here. (We don't use inode number 0,
5617 * since glibc seems to choke on it...)
5618 */
5619 entry->ino = 1;
5620
5621 len = ntohl(*p++); /* bitmap length */
5622 if (len-- > 0) {
5623 bitmap[0] = ntohl(*p++);
5624 if (len-- > 0) {
5625 bitmap[1] = ntohl(*p++);
5626 p += len;
5627 }
5628 }
5629 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5630 if (len > 0) {
5631 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5632 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5633 /* Ignore the return value of rdattr_error for now */
5634 p++;
5635 len--;
5636 }
5637 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5638 xdr_decode_hyper(p, &entry->ino);
5639 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5640 xdr_decode_hyper(p, &entry->ino);
5641 p += len;
5642 }
5643
5644 entry->eof = !p[0] && p[1];
5645 return p;
5646 }
5647
5648 /*
5649 * We need to translate between nfs status return values and
5650 * the local errno values which may not be the same.
5651 */
5652 static struct {
5653 int stat;
5654 int errno;
5655 } nfs_errtbl[] = {
5656 { NFS4_OK, 0 },
5657 { NFS4ERR_PERM, -EPERM },
5658 { NFS4ERR_NOENT, -ENOENT },
5659 { NFS4ERR_IO, -errno_NFSERR_IO},
5660 { NFS4ERR_NXIO, -ENXIO },
5661 { NFS4ERR_ACCESS, -EACCES },
5662 { NFS4ERR_EXIST, -EEXIST },
5663 { NFS4ERR_XDEV, -EXDEV },
5664 { NFS4ERR_NOTDIR, -ENOTDIR },
5665 { NFS4ERR_ISDIR, -EISDIR },
5666 { NFS4ERR_INVAL, -EINVAL },
5667 { NFS4ERR_FBIG, -EFBIG },
5668 { NFS4ERR_NOSPC, -ENOSPC },
5669 { NFS4ERR_ROFS, -EROFS },
5670 { NFS4ERR_MLINK, -EMLINK },
5671 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
5672 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
5673 { NFS4ERR_DQUOT, -EDQUOT },
5674 { NFS4ERR_STALE, -ESTALE },
5675 { NFS4ERR_BADHANDLE, -EBADHANDLE },
5676 { NFS4ERR_BADOWNER, -EINVAL },
5677 { NFS4ERR_BADNAME, -EINVAL },
5678 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
5679 { NFS4ERR_NOTSUPP, -ENOTSUPP },
5680 { NFS4ERR_TOOSMALL, -ETOOSMALL },
5681 { NFS4ERR_SERVERFAULT, -ESERVERFAULT },
5682 { NFS4ERR_BADTYPE, -EBADTYPE },
5683 { NFS4ERR_LOCKED, -EAGAIN },
5684 { NFS4ERR_SYMLINK, -ELOOP },
5685 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5686 { NFS4ERR_DEADLOCK, -EDEADLK },
5687 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5688 * to be handled by a
5689 * middle-layer.
5690 */
5691 { -1, -EIO }
5692 };
5693
5694 /*
5695 * Convert an NFS error code to a local one.
5696 * This one is used jointly by NFSv2 and NFSv3.
5697 */
5698 static int
5699 nfs4_stat_to_errno(int stat)
5700 {
5701 int i;
5702 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5703 if (nfs_errtbl[i].stat == stat)
5704 return nfs_errtbl[i].errno;
5705 }
5706 if (stat <= 10000 || stat > 10100) {
5707 /* The server is looney tunes. */
5708 return -ESERVERFAULT;
5709 }
5710 /* If we cannot translate the error, the recovery routines should
5711 * handle it.
5712 * Note: remaining NFSv4 error codes have values > 10000, so should
5713 * not conflict with native Linux error codes.
5714 */
5715 return -stat;
5716 }
5717
5718 #define PROC(proc, argtype, restype) \
5719 [NFSPROC4_CLNT_##proc] = { \
5720 .p_proc = NFSPROC4_COMPOUND, \
5721 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5722 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5723 .p_arglen = NFS4_##argtype##_sz, \
5724 .p_replen = NFS4_##restype##_sz, \
5725 .p_statidx = NFSPROC4_CLNT_##proc, \
5726 .p_name = #proc, \
5727 }
5728
5729 struct rpc_procinfo nfs4_procedures[] = {
5730 PROC(READ, enc_read, dec_read),
5731 PROC(WRITE, enc_write, dec_write),
5732 PROC(COMMIT, enc_commit, dec_commit),
5733 PROC(OPEN, enc_open, dec_open),
5734 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5735 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5736 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5737 PROC(CLOSE, enc_close, dec_close),
5738 PROC(SETATTR, enc_setattr, dec_setattr),
5739 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5740 PROC(RENEW, enc_renew, dec_renew),
5741 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5742 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5743 PROC(LOCK, enc_lock, dec_lock),
5744 PROC(LOCKT, enc_lockt, dec_lockt),
5745 PROC(LOCKU, enc_locku, dec_locku),
5746 PROC(ACCESS, enc_access, dec_access),
5747 PROC(GETATTR, enc_getattr, dec_getattr),
5748 PROC(LOOKUP, enc_lookup, dec_lookup),
5749 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5750 PROC(REMOVE, enc_remove, dec_remove),
5751 PROC(RENAME, enc_rename, dec_rename),
5752 PROC(LINK, enc_link, dec_link),
5753 PROC(SYMLINK, enc_symlink, dec_symlink),
5754 PROC(CREATE, enc_create, dec_create),
5755 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5756 PROC(STATFS, enc_statfs, dec_statfs),
5757 PROC(READLINK, enc_readlink, dec_readlink),
5758 PROC(READDIR, enc_readdir, dec_readdir),
5759 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5760 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5761 PROC(GETACL, enc_getacl, dec_getacl),
5762 PROC(SETACL, enc_setacl, dec_setacl),
5763 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5764 #if defined(CONFIG_NFS_V4_1)
5765 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5766 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
5767 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
5768 PROC(SEQUENCE, enc_sequence, dec_sequence),
5769 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
5770 #endif /* CONFIG_NFS_V4_1 */
5771 };
5772
5773 struct rpc_version nfs_version4 = {
5774 .number = 4,
5775 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5776 .procs = nfs4_procedures
5777 };
5778
5779 /*
5780 * Local variables:
5781 * c-basic-offset: 8
5782 * End:
5783 */
Linux with added FPC-III support