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Staging: android: lowmemorykiller: fix module param errors
[linux-2.6.git] / fs / nfs / nfs4xdr.c
blobcfc30d362f94e5ab60c4724ce97a2cf9f6d75626
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/utsname.h>
43 #include <linux/errno.h>
44 #include <linux/string.h>
45 #include <linux/in.h>
46 #include <linux/pagemap.h>
47 #include <linux/proc_fs.h>
48 #include <linux/kdev_t.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55
56 #define NFSDBG_FACILITY NFSDBG_XDR
57
58 /* Mapping from NFS error code to "errno" error code. */
59 #define errno_NFSERR_IO EIO
60
61 static int nfs4_stat_to_errno(int);
62
63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64 #ifdef DEBUG
65 #define NFS4_MAXTAGLEN 20
66 #else
67 #define NFS4_MAXTAGLEN 0
68 #endif
69
70 /* lock,open owner id:
71 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
72 */
73 #define open_owner_id_maxsz (1 + 4)
74 #define lock_owner_id_maxsz (1 + 4)
75 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
76 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
77 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define op_encode_hdr_maxsz (1)
79 #define op_decode_hdr_maxsz (2)
80 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
81 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
83 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
85 (NFS4_FHSIZE >> 2))
86 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
87 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
88 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
91 ((3+NFS4_FHSIZE) >> 2))
92 #define nfs4_fattr_bitmap_maxsz 3
93 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
94 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
95 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
96 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
97 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 /* This is based on getfattr, which uses the most attributes: */
99 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
100 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
101 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
102 nfs4_fattr_value_maxsz)
103 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
104 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
105 1 + 2 + 1 + \
106 nfs4_owner_maxsz + \
107 nfs4_group_maxsz + \
108 4 + 4)
109 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
110 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
111 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
114 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
115 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
116 #define decode_renew_maxsz (op_decode_hdr_maxsz)
117 #define encode_setclientid_maxsz \
118 (op_encode_hdr_maxsz + \
119 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
120 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
121 1 /* sc_prog */ + \
122 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
123 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
124 1) /* sc_cb_ident */
125 #define decode_setclientid_maxsz \
126 (op_decode_hdr_maxsz + \
127 2 + \
128 1024) /* large value for CLID_INUSE */
129 #define encode_setclientid_confirm_maxsz \
130 (op_encode_hdr_maxsz + \
131 3 + (NFS4_VERIFIER_SIZE >> 2))
132 #define decode_setclientid_confirm_maxsz \
133 (op_decode_hdr_maxsz)
134 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
135 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
136 #define encode_share_access_maxsz \
137 (2)
138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
139 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
141 #define encode_open_maxsz (op_encode_hdr_maxsz + \
142 2 + encode_share_access_maxsz + 2 + \
143 open_owner_id_maxsz + \
144 encode_opentype_maxsz + \
145 encode_claim_null_maxsz)
146 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
148 decode_ace_maxsz)
149 #define decode_change_info_maxsz (5)
150 #define decode_open_maxsz (op_decode_hdr_maxsz + \
151 decode_stateid_maxsz + \
152 decode_change_info_maxsz + 1 + \
153 nfs4_fattr_bitmap_maxsz + \
154 decode_delegation_maxsz)
155 #define encode_open_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 encode_stateid_maxsz + 1)
158 #define decode_open_confirm_maxsz \
159 (op_decode_hdr_maxsz + \
160 decode_stateid_maxsz)
161 #define encode_open_downgrade_maxsz \
162 (op_encode_hdr_maxsz + \
163 encode_stateid_maxsz + 1 + \
164 encode_share_access_maxsz)
165 #define decode_open_downgrade_maxsz \
166 (op_decode_hdr_maxsz + \
167 decode_stateid_maxsz)
168 #define encode_close_maxsz (op_encode_hdr_maxsz + \
169 1 + encode_stateid_maxsz)
170 #define decode_close_maxsz (op_decode_hdr_maxsz + \
171 decode_stateid_maxsz)
172 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
173 encode_stateid_maxsz + \
174 encode_attrs_maxsz)
175 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
176 nfs4_fattr_bitmap_maxsz)
177 #define encode_read_maxsz (op_encode_hdr_maxsz + \
178 encode_stateid_maxsz + 3)
179 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
180 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
181 2 + encode_verifier_maxsz + 5)
182 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
183 decode_verifier_maxsz)
184 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
185 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
186 #define encode_write_maxsz (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 4)
188 #define decode_write_maxsz (op_decode_hdr_maxsz + \
189 2 + decode_verifier_maxsz)
190 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
191 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
192 decode_verifier_maxsz)
193 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
194 nfs4_name_maxsz)
195 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
196 decode_change_info_maxsz)
197 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
198 2 * nfs4_name_maxsz)
199 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
200 decode_change_info_maxsz + \
201 decode_change_info_maxsz)
202 #define encode_link_maxsz (op_encode_hdr_maxsz + \
203 nfs4_name_maxsz)
204 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
205 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
206 7 + \
207 1 + encode_stateid_maxsz + 8)
208 #define decode_lock_denied_maxsz \
209 (8 + decode_lockowner_maxsz)
210 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
211 decode_lock_denied_maxsz)
212 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 12)
213 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
214 decode_lock_denied_maxsz)
215 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
216 encode_stateid_maxsz + \
217 4)
218 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
219 decode_stateid_maxsz)
220 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
221 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
222 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
223 1 + nfs4_name_maxsz + \
224 1 + \
225 nfs4_fattr_maxsz)
226 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
227 #define encode_create_maxsz (op_encode_hdr_maxsz + \
228 1 + 2 + nfs4_name_maxsz + \
229 encode_attrs_maxsz)
230 #define decode_create_maxsz (op_decode_hdr_maxsz + \
231 decode_change_info_maxsz + \
232 nfs4_fattr_bitmap_maxsz)
233 #define encode_statfs_maxsz (encode_getattr_maxsz)
234 #define decode_statfs_maxsz (decode_getattr_maxsz)
235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
237 #define encode_getacl_maxsz (encode_getattr_maxsz)
238 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
239 nfs4_fattr_bitmap_maxsz + 1)
240 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
241 encode_stateid_maxsz + 3)
242 #define decode_setacl_maxsz (decode_setattr_maxsz)
243 #define encode_fs_locations_maxsz \
244 (encode_getattr_maxsz)
245 #define decode_fs_locations_maxsz \
246 (0)
247
248 #if defined(CONFIG_NFS_V4_1)
249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
250
251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
252 encode_verifier_maxsz + \
253 1 /* co_ownerid.len */ + \
254 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
255 1 /* flags */ + \
256 1 /* spa_how */ + \
257 0 /* SP4_NONE (for now) */ + \
258 1 /* zero implemetation id array */)
259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
260 2 /* eir_clientid */ + \
261 1 /* eir_sequenceid */ + \
262 1 /* eir_flags */ + \
263 1 /* spr_how */ + \
264 0 /* SP4_NONE (for now) */ + \
265 2 /* eir_server_owner.so_minor_id */ + \
266 /* eir_server_owner.so_major_id<> */ \
267 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
268 /* eir_server_scope<> */ \
269 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
270 1 /* eir_server_impl_id array length */ + \
271 0 /* ignored eir_server_impl_id contents */)
272 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
273 #define decode_channel_attrs_maxsz (6 + \
274 1 /* ca_rdma_ird.len */ + \
275 1 /* ca_rdma_ird */)
276 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
277 2 /* csa_clientid */ + \
278 1 /* csa_sequence */ + \
279 1 /* csa_flags */ + \
280 encode_channel_attrs_maxsz + \
281 encode_channel_attrs_maxsz + \
282 1 /* csa_cb_program */ + \
283 1 /* csa_sec_parms.len (1) */ + \
284 1 /* cb_secflavor (AUTH_SYS) */ + \
285 1 /* stamp */ + \
286 1 /* machinename.len */ + \
287 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
288 1 /* uid */ + \
289 1 /* gid */ + \
290 1 /* gids.len (0) */)
291 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
292 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
293 1 /* csr_sequence */ + \
294 1 /* csr_flags */ + \
295 decode_channel_attrs_maxsz + \
296 decode_channel_attrs_maxsz)
297 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
298 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
299 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
300 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
301 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
302 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
303 #else /* CONFIG_NFS_V4_1 */
304 #define encode_sequence_maxsz 0
305 #define decode_sequence_maxsz 0
306 #endif /* CONFIG_NFS_V4_1 */
307
308 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
309 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
310 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
311 encode_sequence_maxsz + \
312 encode_putfh_maxsz + \
313 encode_read_maxsz)
314 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
315 decode_sequence_maxsz + \
316 decode_putfh_maxsz + \
317 decode_read_maxsz)
318 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
319 encode_sequence_maxsz + \
320 encode_putfh_maxsz + \
321 encode_readlink_maxsz)
322 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
323 decode_sequence_maxsz + \
324 decode_putfh_maxsz + \
325 decode_readlink_maxsz)
326 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
327 encode_sequence_maxsz + \
328 encode_putfh_maxsz + \
329 encode_readdir_maxsz)
330 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
331 decode_sequence_maxsz + \
332 decode_putfh_maxsz + \
333 decode_readdir_maxsz)
334 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
335 encode_sequence_maxsz + \
336 encode_putfh_maxsz + \
337 encode_write_maxsz + \
338 encode_getattr_maxsz)
339 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
340 decode_sequence_maxsz + \
341 decode_putfh_maxsz + \
342 decode_write_maxsz + \
343 decode_getattr_maxsz)
344 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
345 encode_sequence_maxsz + \
346 encode_putfh_maxsz + \
347 encode_commit_maxsz + \
348 encode_getattr_maxsz)
349 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
350 decode_sequence_maxsz + \
351 decode_putfh_maxsz + \
352 decode_commit_maxsz + \
353 decode_getattr_maxsz)
354 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
355 encode_sequence_maxsz + \
356 encode_putfh_maxsz + \
357 encode_savefh_maxsz + \
358 encode_open_maxsz + \
359 encode_getfh_maxsz + \
360 encode_getattr_maxsz + \
361 encode_restorefh_maxsz + \
362 encode_getattr_maxsz)
363 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
364 decode_sequence_maxsz + \
365 decode_putfh_maxsz + \
366 decode_savefh_maxsz + \
367 decode_open_maxsz + \
368 decode_getfh_maxsz + \
369 decode_getattr_maxsz + \
370 decode_restorefh_maxsz + \
371 decode_getattr_maxsz)
372 #define NFS4_enc_open_confirm_sz \
373 (compound_encode_hdr_maxsz + \
374 encode_putfh_maxsz + \
375 encode_open_confirm_maxsz)
376 #define NFS4_dec_open_confirm_sz \
377 (compound_decode_hdr_maxsz + \
378 decode_putfh_maxsz + \
379 decode_open_confirm_maxsz)
380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
381 encode_sequence_maxsz + \
382 encode_putfh_maxsz + \
383 encode_open_maxsz + \
384 encode_getattr_maxsz)
385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
386 decode_sequence_maxsz + \
387 decode_putfh_maxsz + \
388 decode_open_maxsz + \
389 decode_getattr_maxsz)
390 #define NFS4_enc_open_downgrade_sz \
391 (compound_encode_hdr_maxsz + \
392 encode_sequence_maxsz + \
393 encode_putfh_maxsz + \
394 encode_open_downgrade_maxsz + \
395 encode_getattr_maxsz)
396 #define NFS4_dec_open_downgrade_sz \
397 (compound_decode_hdr_maxsz + \
398 decode_sequence_maxsz + \
399 decode_putfh_maxsz + \
400 decode_open_downgrade_maxsz + \
401 decode_getattr_maxsz)
402 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
403 encode_sequence_maxsz + \
404 encode_putfh_maxsz + \
405 encode_close_maxsz + \
406 encode_getattr_maxsz)
407 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
408 decode_sequence_maxsz + \
409 decode_putfh_maxsz + \
410 decode_close_maxsz + \
411 decode_getattr_maxsz)
412 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
413 encode_sequence_maxsz + \
414 encode_putfh_maxsz + \
415 encode_setattr_maxsz + \
416 encode_getattr_maxsz)
417 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
418 decode_sequence_maxsz + \
419 decode_putfh_maxsz + \
420 decode_setattr_maxsz + \
421 decode_getattr_maxsz)
422 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
423 encode_sequence_maxsz + \
424 encode_putfh_maxsz + \
425 encode_fsinfo_maxsz)
426 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
427 decode_sequence_maxsz + \
428 decode_putfh_maxsz + \
429 decode_fsinfo_maxsz)
430 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
431 encode_renew_maxsz)
432 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
433 decode_renew_maxsz)
434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
435 encode_setclientid_maxsz)
436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
437 decode_setclientid_maxsz)
438 #define NFS4_enc_setclientid_confirm_sz \
439 (compound_encode_hdr_maxsz + \
440 encode_setclientid_confirm_maxsz + \
441 encode_putrootfh_maxsz + \
442 encode_fsinfo_maxsz)
443 #define NFS4_dec_setclientid_confirm_sz \
444 (compound_decode_hdr_maxsz + \
445 decode_setclientid_confirm_maxsz + \
446 decode_putrootfh_maxsz + \
447 decode_fsinfo_maxsz)
448 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
449 encode_sequence_maxsz + \
450 encode_putfh_maxsz + \
451 encode_lock_maxsz)
452 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
453 decode_sequence_maxsz + \
454 decode_putfh_maxsz + \
455 decode_lock_maxsz)
456 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
457 encode_sequence_maxsz + \
458 encode_putfh_maxsz + \
459 encode_lockt_maxsz)
460 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
461 decode_sequence_maxsz + \
462 decode_putfh_maxsz + \
463 decode_lockt_maxsz)
464 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
465 encode_sequence_maxsz + \
466 encode_putfh_maxsz + \
467 encode_locku_maxsz)
468 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
469 decode_sequence_maxsz + \
470 decode_putfh_maxsz + \
471 decode_locku_maxsz)
472 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
473 encode_sequence_maxsz + \
474 encode_putfh_maxsz + \
475 encode_access_maxsz + \
476 encode_getattr_maxsz)
477 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
478 decode_sequence_maxsz + \
479 decode_putfh_maxsz + \
480 decode_access_maxsz + \
481 decode_getattr_maxsz)
482 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
483 encode_sequence_maxsz + \
484 encode_putfh_maxsz + \
485 encode_getattr_maxsz)
486 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
487 decode_sequence_maxsz + \
488 decode_putfh_maxsz + \
489 decode_getattr_maxsz)
490 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
491 encode_sequence_maxsz + \
492 encode_putfh_maxsz + \
493 encode_lookup_maxsz + \
494 encode_getattr_maxsz + \
495 encode_getfh_maxsz)
496 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
497 decode_sequence_maxsz + \
498 decode_putfh_maxsz + \
499 decode_lookup_maxsz + \
500 decode_getattr_maxsz + \
501 decode_getfh_maxsz)
502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putrootfh_maxsz + \
505 encode_getattr_maxsz + \
506 encode_getfh_maxsz)
507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
508 decode_sequence_maxsz + \
509 decode_putrootfh_maxsz + \
510 decode_getattr_maxsz + \
511 decode_getfh_maxsz)
512 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
513 encode_sequence_maxsz + \
514 encode_putfh_maxsz + \
515 encode_remove_maxsz + \
516 encode_getattr_maxsz)
517 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
518 decode_sequence_maxsz + \
519 decode_putfh_maxsz + \
520 decode_remove_maxsz + \
521 decode_getattr_maxsz)
522 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
523 encode_sequence_maxsz + \
524 encode_putfh_maxsz + \
525 encode_savefh_maxsz + \
526 encode_putfh_maxsz + \
527 encode_rename_maxsz + \
528 encode_getattr_maxsz + \
529 encode_restorefh_maxsz + \
530 encode_getattr_maxsz)
531 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
532 decode_sequence_maxsz + \
533 decode_putfh_maxsz + \
534 decode_savefh_maxsz + \
535 decode_putfh_maxsz + \
536 decode_rename_maxsz + \
537 decode_getattr_maxsz + \
538 decode_restorefh_maxsz + \
539 decode_getattr_maxsz)
540 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
541 encode_sequence_maxsz + \
542 encode_putfh_maxsz + \
543 encode_savefh_maxsz + \
544 encode_putfh_maxsz + \
545 encode_link_maxsz + \
546 decode_getattr_maxsz + \
547 encode_restorefh_maxsz + \
548 decode_getattr_maxsz)
549 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
550 decode_sequence_maxsz + \
551 decode_putfh_maxsz + \
552 decode_savefh_maxsz + \
553 decode_putfh_maxsz + \
554 decode_link_maxsz + \
555 decode_getattr_maxsz + \
556 decode_restorefh_maxsz + \
557 decode_getattr_maxsz)
558 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
559 encode_sequence_maxsz + \
560 encode_putfh_maxsz + \
561 encode_symlink_maxsz + \
562 encode_getattr_maxsz + \
563 encode_getfh_maxsz)
564 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
565 decode_sequence_maxsz + \
566 decode_putfh_maxsz + \
567 decode_symlink_maxsz + \
568 decode_getattr_maxsz + \
569 decode_getfh_maxsz)
570 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
571 encode_sequence_maxsz + \
572 encode_putfh_maxsz + \
573 encode_savefh_maxsz + \
574 encode_create_maxsz + \
575 encode_getfh_maxsz + \
576 encode_getattr_maxsz + \
577 encode_restorefh_maxsz + \
578 encode_getattr_maxsz)
579 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putfh_maxsz + \
582 decode_savefh_maxsz + \
583 decode_create_maxsz + \
584 decode_getfh_maxsz + \
585 decode_getattr_maxsz + \
586 decode_restorefh_maxsz + \
587 decode_getattr_maxsz)
588 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
589 encode_sequence_maxsz + \
590 encode_putfh_maxsz + \
591 encode_getattr_maxsz)
592 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
593 decode_sequence_maxsz + \
594 decode_putfh_maxsz + \
595 decode_getattr_maxsz)
596 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
597 encode_sequence_maxsz + \
598 encode_putfh_maxsz + \
599 encode_statfs_maxsz)
600 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
601 decode_sequence_maxsz + \
602 decode_putfh_maxsz + \
603 decode_statfs_maxsz)
604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
605 encode_sequence_maxsz + \
606 encode_putfh_maxsz + \
607 encode_getattr_maxsz)
608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
609 decode_sequence_maxsz + \
610 decode_putfh_maxsz + \
611 decode_getattr_maxsz)
612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
613 encode_sequence_maxsz + \
614 encode_putfh_maxsz + \
615 encode_delegreturn_maxsz + \
616 encode_getattr_maxsz)
617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
618 decode_sequence_maxsz + \
619 decode_delegreturn_maxsz + \
620 decode_getattr_maxsz)
621 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
622 encode_sequence_maxsz + \
623 encode_putfh_maxsz + \
624 encode_getacl_maxsz)
625 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
626 decode_sequence_maxsz + \
627 decode_putfh_maxsz + \
628 decode_getacl_maxsz)
629 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
630 encode_sequence_maxsz + \
631 encode_putfh_maxsz + \
632 encode_setacl_maxsz)
633 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_setacl_maxsz)
637 #define NFS4_enc_fs_locations_sz \
638 (compound_encode_hdr_maxsz + \
639 encode_sequence_maxsz + \
640 encode_putfh_maxsz + \
641 encode_lookup_maxsz + \
642 encode_fs_locations_maxsz)
643 #define NFS4_dec_fs_locations_sz \
644 (compound_decode_hdr_maxsz + \
645 decode_sequence_maxsz + \
646 decode_putfh_maxsz + \
647 decode_lookup_maxsz + \
648 decode_fs_locations_maxsz)
649 #if defined(CONFIG_NFS_V4_1)
650 #define NFS4_enc_exchange_id_sz \
651 (compound_encode_hdr_maxsz + \
652 encode_exchange_id_maxsz)
653 #define NFS4_dec_exchange_id_sz \
654 (compound_decode_hdr_maxsz + \
655 decode_exchange_id_maxsz)
656 #define NFS4_enc_create_session_sz \
657 (compound_encode_hdr_maxsz + \
658 encode_create_session_maxsz)
659 #define NFS4_dec_create_session_sz \
660 (compound_decode_hdr_maxsz + \
661 decode_create_session_maxsz)
662 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
663 encode_destroy_session_maxsz)
664 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
665 decode_destroy_session_maxsz)
666 #define NFS4_enc_sequence_sz \
667 (compound_decode_hdr_maxsz + \
668 encode_sequence_maxsz)
669 #define NFS4_dec_sequence_sz \
670 (compound_decode_hdr_maxsz + \
671 decode_sequence_maxsz)
672 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
673 encode_sequence_maxsz + \
674 encode_putrootfh_maxsz + \
675 encode_fsinfo_maxsz)
676 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
677 decode_sequence_maxsz + \
678 decode_putrootfh_maxsz + \
679 decode_fsinfo_maxsz)
680 #endif /* CONFIG_NFS_V4_1 */
681
682 static const umode_t nfs_type2fmt[] = {
683 [NF4BAD] = 0,
684 [NF4REG] = S_IFREG,
685 [NF4DIR] = S_IFDIR,
686 [NF4BLK] = S_IFBLK,
687 [NF4CHR] = S_IFCHR,
688 [NF4LNK] = S_IFLNK,
689 [NF4SOCK] = S_IFSOCK,
690 [NF4FIFO] = S_IFIFO,
691 [NF4ATTRDIR] = 0,
692 [NF4NAMEDATTR] = 0,
693 };
694
695 struct compound_hdr {
696 int32_t status;
697 uint32_t nops;
698 __be32 * nops_p;
699 uint32_t taglen;
700 char * tag;
701 uint32_t replen; /* expected reply words */
702 u32 minorversion;
703 };
704
705 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
706 {
707 __be32 *p = xdr_reserve_space(xdr, nbytes);
708 BUG_ON(!p);
709 return p;
710 }
711
712 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
713 {
714 __be32 *p;
715
716 p = xdr_reserve_space(xdr, 4 + len);
717 BUG_ON(p == NULL);
718 xdr_encode_opaque(p, str, len);
719 }
720
721 static void encode_compound_hdr(struct xdr_stream *xdr,
722 struct rpc_rqst *req,
723 struct compound_hdr *hdr)
724 {
725 __be32 *p;
726 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
727
728 /* initialize running count of expected bytes in reply.
729 * NOTE: the replied tag SHOULD be the same is the one sent,
730 * but this is not required as a MUST for the server to do so. */
731 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
732
733 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
734 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
735 p = reserve_space(xdr, 4 + hdr->taglen + 8);
736 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
737 *p++ = cpu_to_be32(hdr->minorversion);
738 hdr->nops_p = p;
739 *p = cpu_to_be32(hdr->nops);
740 }
741
742 static void encode_nops(struct compound_hdr *hdr)
743 {
744 BUG_ON(hdr->nops > NFS4_MAX_OPS);
745 *hdr->nops_p = htonl(hdr->nops);
746 }
747
748 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
749 {
750 __be32 *p;
751
752 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
753 BUG_ON(p == NULL);
754 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
755 }
756
757 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
758 {
759 char owner_name[IDMAP_NAMESZ];
760 char owner_group[IDMAP_NAMESZ];
761 int owner_namelen = 0;
762 int owner_grouplen = 0;
763 __be32 *p;
764 __be32 *q;
765 int len;
766 uint32_t bmval0 = 0;
767 uint32_t bmval1 = 0;
768
769 /*
770 * We reserve enough space to write the entire attribute buffer at once.
771 * In the worst-case, this would be
772 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
773 * = 36 bytes, plus any contribution from variable-length fields
774 * such as owner/group.
775 */
776 len = 16;
777
778 /* Sigh */
779 if (iap->ia_valid & ATTR_SIZE)
780 len += 8;
781 if (iap->ia_valid & ATTR_MODE)
782 len += 4;
783 if (iap->ia_valid & ATTR_UID) {
784 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
785 if (owner_namelen < 0) {
786 dprintk("nfs: couldn't resolve uid %d to string\n",
787 iap->ia_uid);
788 /* XXX */
789 strcpy(owner_name, "nobody");
790 owner_namelen = sizeof("nobody") - 1;
791 /* goto out; */
792 }
793 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
794 }
795 if (iap->ia_valid & ATTR_GID) {
796 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
797 if (owner_grouplen < 0) {
798 dprintk("nfs: couldn't resolve gid %d to string\n",
799 iap->ia_gid);
800 strcpy(owner_group, "nobody");
801 owner_grouplen = sizeof("nobody") - 1;
802 /* goto out; */
803 }
804 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
805 }
806 if (iap->ia_valid & ATTR_ATIME_SET)
807 len += 16;
808 else if (iap->ia_valid & ATTR_ATIME)
809 len += 4;
810 if (iap->ia_valid & ATTR_MTIME_SET)
811 len += 16;
812 else if (iap->ia_valid & ATTR_MTIME)
813 len += 4;
814 p = reserve_space(xdr, len);
815
816 /*
817 * We write the bitmap length now, but leave the bitmap and the attribute
818 * buffer length to be backfilled at the end of this routine.
819 */
820 *p++ = cpu_to_be32(2);
821 q = p;
822 p += 3;
823
824 if (iap->ia_valid & ATTR_SIZE) {
825 bmval0 |= FATTR4_WORD0_SIZE;
826 p = xdr_encode_hyper(p, iap->ia_size);
827 }
828 if (iap->ia_valid & ATTR_MODE) {
829 bmval1 |= FATTR4_WORD1_MODE;
830 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
831 }
832 if (iap->ia_valid & ATTR_UID) {
833 bmval1 |= FATTR4_WORD1_OWNER;
834 p = xdr_encode_opaque(p, owner_name, owner_namelen);
835 }
836 if (iap->ia_valid & ATTR_GID) {
837 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
838 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
839 }
840 if (iap->ia_valid & ATTR_ATIME_SET) {
841 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
842 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
843 *p++ = cpu_to_be32(0);
844 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
845 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
846 }
847 else if (iap->ia_valid & ATTR_ATIME) {
848 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
849 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
850 }
851 if (iap->ia_valid & ATTR_MTIME_SET) {
852 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
853 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
854 *p++ = cpu_to_be32(0);
855 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
856 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
857 }
858 else if (iap->ia_valid & ATTR_MTIME) {
859 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
860 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
861 }
862
863 /*
864 * Now we backfill the bitmap and the attribute buffer length.
865 */
866 if (len != ((char *)p - (char *)q) + 4) {
867 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
868 len, ((char *)p - (char *)q) + 4);
869 BUG();
870 }
871 len = (char *)p - (char *)q - 12;
872 *q++ = htonl(bmval0);
873 *q++ = htonl(bmval1);
874 *q = htonl(len);
875
876 /* out: */
877 }
878
879 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
880 {
881 __be32 *p;
882
883 p = reserve_space(xdr, 8);
884 *p++ = cpu_to_be32(OP_ACCESS);
885 *p = cpu_to_be32(access);
886 hdr->nops++;
887 hdr->replen += decode_access_maxsz;
888 }
889
890 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
891 {
892 __be32 *p;
893
894 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
895 *p++ = cpu_to_be32(OP_CLOSE);
896 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
897 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
898 hdr->nops++;
899 hdr->replen += decode_close_maxsz;
900 }
901
902 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
903 {
904 __be32 *p;
905
906 p = reserve_space(xdr, 16);
907 *p++ = cpu_to_be32(OP_COMMIT);
908 p = xdr_encode_hyper(p, args->offset);
909 *p = cpu_to_be32(args->count);
910 hdr->nops++;
911 hdr->replen += decode_commit_maxsz;
912 }
913
914 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
915 {
916 __be32 *p;
917
918 p = reserve_space(xdr, 8);
919 *p++ = cpu_to_be32(OP_CREATE);
920 *p = cpu_to_be32(create->ftype);
921
922 switch (create->ftype) {
923 case NF4LNK:
924 p = reserve_space(xdr, 4);
925 *p = cpu_to_be32(create->u.symlink.len);
926 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
927 break;
928
929 case NF4BLK: case NF4CHR:
930 p = reserve_space(xdr, 8);
931 *p++ = cpu_to_be32(create->u.device.specdata1);
932 *p = cpu_to_be32(create->u.device.specdata2);
933 break;
934
935 default:
936 break;
937 }
938
939 encode_string(xdr, create->name->len, create->name->name);
940 hdr->nops++;
941 hdr->replen += decode_create_maxsz;
942
943 encode_attrs(xdr, create->attrs, create->server);
944 }
945
946 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
947 {
948 __be32 *p;
949
950 p = reserve_space(xdr, 12);
951 *p++ = cpu_to_be32(OP_GETATTR);
952 *p++ = cpu_to_be32(1);
953 *p = cpu_to_be32(bitmap);
954 hdr->nops++;
955 hdr->replen += decode_getattr_maxsz;
956 }
957
958 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
959 {
960 __be32 *p;
961
962 p = reserve_space(xdr, 16);
963 *p++ = cpu_to_be32(OP_GETATTR);
964 *p++ = cpu_to_be32(2);
965 *p++ = cpu_to_be32(bm0);
966 *p = cpu_to_be32(bm1);
967 hdr->nops++;
968 hdr->replen += decode_getattr_maxsz;
969 }
970
971 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
972 {
973 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
974 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
975 }
976
977 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
978 {
979 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
980 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
981 }
982
983 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
984 {
985 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
986 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
987 }
988
989 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
990 {
991 __be32 *p;
992
993 p = reserve_space(xdr, 4);
994 *p = cpu_to_be32(OP_GETFH);
995 hdr->nops++;
996 hdr->replen += decode_getfh_maxsz;
997 }
998
999 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1000 {
1001 __be32 *p;
1002
1003 p = reserve_space(xdr, 8 + name->len);
1004 *p++ = cpu_to_be32(OP_LINK);
1005 xdr_encode_opaque(p, name->name, name->len);
1006 hdr->nops++;
1007 hdr->replen += decode_link_maxsz;
1008 }
1009
1010 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1011 {
1012 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1013 return block ? NFS4_READW_LT : NFS4_READ_LT;
1014 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1015 }
1016
1017 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1018 {
1019 if (fl->fl_end == OFFSET_MAX)
1020 return ~(uint64_t)0;
1021 return fl->fl_end - fl->fl_start + 1;
1022 }
1023
1024 /*
1025 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1026 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1027 */
1028 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1029 {
1030 __be32 *p;
1031
1032 p = reserve_space(xdr, 32);
1033 *p++ = cpu_to_be32(OP_LOCK);
1034 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1035 *p++ = cpu_to_be32(args->reclaim);
1036 p = xdr_encode_hyper(p, args->fl->fl_start);
1037 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1038 *p = cpu_to_be32(args->new_lock_owner);
1039 if (args->new_lock_owner){
1040 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1041 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1042 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1043 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1044 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1045 *p++ = cpu_to_be32(16);
1046 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1047 xdr_encode_hyper(p, args->lock_owner.id);
1048 }
1049 else {
1050 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1051 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1052 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1053 }
1054 hdr->nops++;
1055 hdr->replen += decode_lock_maxsz;
1056 }
1057
1058 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1059 {
1060 __be32 *p;
1061
1062 p = reserve_space(xdr, 52);
1063 *p++ = cpu_to_be32(OP_LOCKT);
1064 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1065 p = xdr_encode_hyper(p, args->fl->fl_start);
1066 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1067 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1068 *p++ = cpu_to_be32(16);
1069 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1070 xdr_encode_hyper(p, args->lock_owner.id);
1071 hdr->nops++;
1072 hdr->replen += decode_lockt_maxsz;
1073 }
1074
1075 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1076 {
1077 __be32 *p;
1078
1079 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1080 *p++ = cpu_to_be32(OP_LOCKU);
1081 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1082 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1083 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1084 p = xdr_encode_hyper(p, args->fl->fl_start);
1085 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1086 hdr->nops++;
1087 hdr->replen += decode_locku_maxsz;
1088 }
1089
1090 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1091 {
1092 int len = name->len;
1093 __be32 *p;
1094
1095 p = reserve_space(xdr, 8 + len);
1096 *p++ = cpu_to_be32(OP_LOOKUP);
1097 xdr_encode_opaque(p, name->name, len);
1098 hdr->nops++;
1099 hdr->replen += decode_lookup_maxsz;
1100 }
1101
1102 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1103 {
1104 __be32 *p;
1105
1106 p = reserve_space(xdr, 8);
1107 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1108 case FMODE_READ:
1109 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1110 break;
1111 case FMODE_WRITE:
1112 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1113 break;
1114 case FMODE_READ|FMODE_WRITE:
1115 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1116 break;
1117 default:
1118 *p++ = cpu_to_be32(0);
1119 }
1120 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1121 }
1122
1123 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1124 {
1125 __be32 *p;
1126 /*
1127 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1128 * owner 4 = 32
1129 */
1130 p = reserve_space(xdr, 8);
1131 *p++ = cpu_to_be32(OP_OPEN);
1132 *p = cpu_to_be32(arg->seqid->sequence->counter);
1133 encode_share_access(xdr, arg->fmode);
1134 p = reserve_space(xdr, 28);
1135 p = xdr_encode_hyper(p, arg->clientid);
1136 *p++ = cpu_to_be32(16);
1137 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1138 xdr_encode_hyper(p, arg->id);
1139 }
1140
1141 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1142 {
1143 __be32 *p;
1144
1145 p = reserve_space(xdr, 4);
1146 switch(arg->open_flags & O_EXCL) {
1147 case 0:
1148 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1149 encode_attrs(xdr, arg->u.attrs, arg->server);
1150 break;
1151 default:
1152 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1153 encode_nfs4_verifier(xdr, &arg->u.verifier);
1154 }
1155 }
1156
1157 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1158 {
1159 __be32 *p;
1160
1161 p = reserve_space(xdr, 4);
1162 switch (arg->open_flags & O_CREAT) {
1163 case 0:
1164 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1165 break;
1166 default:
1167 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1168 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1169 encode_createmode(xdr, arg);
1170 }
1171 }
1172
1173 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1174 {
1175 __be32 *p;
1176
1177 p = reserve_space(xdr, 4);
1178 switch (delegation_type) {
1179 case 0:
1180 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1181 break;
1182 case FMODE_READ:
1183 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1184 break;
1185 case FMODE_WRITE|FMODE_READ:
1186 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1187 break;
1188 default:
1189 BUG();
1190 }
1191 }
1192
1193 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1194 {
1195 __be32 *p;
1196
1197 p = reserve_space(xdr, 4);
1198 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1199 encode_string(xdr, name->len, name->name);
1200 }
1201
1202 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1203 {
1204 __be32 *p;
1205
1206 p = reserve_space(xdr, 4);
1207 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1208 encode_delegation_type(xdr, type);
1209 }
1210
1211 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1212 {
1213 __be32 *p;
1214
1215 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1216 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1217 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1218 encode_string(xdr, name->len, name->name);
1219 }
1220
1221 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1222 {
1223 encode_openhdr(xdr, arg);
1224 encode_opentype(xdr, arg);
1225 switch (arg->claim) {
1226 case NFS4_OPEN_CLAIM_NULL:
1227 encode_claim_null(xdr, arg->name);
1228 break;
1229 case NFS4_OPEN_CLAIM_PREVIOUS:
1230 encode_claim_previous(xdr, arg->u.delegation_type);
1231 break;
1232 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1233 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1234 break;
1235 default:
1236 BUG();
1237 }
1238 hdr->nops++;
1239 hdr->replen += decode_open_maxsz;
1240 }
1241
1242 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1243 {
1244 __be32 *p;
1245
1246 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1247 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1248 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1249 *p = cpu_to_be32(arg->seqid->sequence->counter);
1250 hdr->nops++;
1251 hdr->replen += decode_open_confirm_maxsz;
1252 }
1253
1254 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1255 {
1256 __be32 *p;
1257
1258 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1259 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1260 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1261 *p = cpu_to_be32(arg->seqid->sequence->counter);
1262 encode_share_access(xdr, arg->fmode);
1263 hdr->nops++;
1264 hdr->replen += decode_open_downgrade_maxsz;
1265 }
1266
1267 static void
1268 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1269 {
1270 int len = fh->size;
1271 __be32 *p;
1272
1273 p = reserve_space(xdr, 8 + len);
1274 *p++ = cpu_to_be32(OP_PUTFH);
1275 xdr_encode_opaque(p, fh->data, len);
1276 hdr->nops++;
1277 hdr->replen += decode_putfh_maxsz;
1278 }
1279
1280 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1281 {
1282 __be32 *p;
1283
1284 p = reserve_space(xdr, 4);
1285 *p = cpu_to_be32(OP_PUTROOTFH);
1286 hdr->nops++;
1287 hdr->replen += decode_putrootfh_maxsz;
1288 }
1289
1290 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1291 {
1292 nfs4_stateid stateid;
1293 __be32 *p;
1294
1295 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1296 if (ctx->state != NULL) {
1297 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1298 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1299 } else
1300 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1301 }
1302
1303 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1304 {
1305 __be32 *p;
1306
1307 p = reserve_space(xdr, 4);
1308 *p = cpu_to_be32(OP_READ);
1309
1310 encode_stateid(xdr, args->context);
1311
1312 p = reserve_space(xdr, 12);
1313 p = xdr_encode_hyper(p, args->offset);
1314 *p = cpu_to_be32(args->count);
1315 hdr->nops++;
1316 hdr->replen += decode_read_maxsz;
1317 }
1318
1319 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1320 {
1321 uint32_t attrs[2] = {
1322 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1323 FATTR4_WORD1_MOUNTED_ON_FILEID,
1324 };
1325 __be32 *p;
1326
1327 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1328 *p++ = cpu_to_be32(OP_READDIR);
1329 p = xdr_encode_hyper(p, readdir->cookie);
1330 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1331 *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
1332 *p++ = cpu_to_be32(readdir->count);
1333 *p++ = cpu_to_be32(2);
1334 /* Switch to mounted_on_fileid if the server supports it */
1335 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1336 attrs[0] &= ~FATTR4_WORD0_FILEID;
1337 else
1338 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1339 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1340 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1341 hdr->nops++;
1342 hdr->replen += decode_readdir_maxsz;
1343 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1344 __func__,
1345 (unsigned long long)readdir->cookie,
1346 ((u32 *)readdir->verifier.data)[0],
1347 ((u32 *)readdir->verifier.data)[1],
1348 attrs[0] & readdir->bitmask[0],
1349 attrs[1] & readdir->bitmask[1]);
1350 }
1351
1352 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1353 {
1354 __be32 *p;
1355
1356 p = reserve_space(xdr, 4);
1357 *p = cpu_to_be32(OP_READLINK);
1358 hdr->nops++;
1359 hdr->replen += decode_readlink_maxsz;
1360 }
1361
1362 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1363 {
1364 __be32 *p;
1365
1366 p = reserve_space(xdr, 8 + name->len);
1367 *p++ = cpu_to_be32(OP_REMOVE);
1368 xdr_encode_opaque(p, name->name, name->len);
1369 hdr->nops++;
1370 hdr->replen += decode_remove_maxsz;
1371 }
1372
1373 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1374 {
1375 __be32 *p;
1376
1377 p = reserve_space(xdr, 4);
1378 *p = cpu_to_be32(OP_RENAME);
1379 encode_string(xdr, oldname->len, oldname->name);
1380 encode_string(xdr, newname->len, newname->name);
1381 hdr->nops++;
1382 hdr->replen += decode_rename_maxsz;
1383 }
1384
1385 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1386 {
1387 __be32 *p;
1388
1389 p = reserve_space(xdr, 12);
1390 *p++ = cpu_to_be32(OP_RENEW);
1391 xdr_encode_hyper(p, client_stateid->cl_clientid);
1392 hdr->nops++;
1393 hdr->replen += decode_renew_maxsz;
1394 }
1395
1396 static void
1397 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1398 {
1399 __be32 *p;
1400
1401 p = reserve_space(xdr, 4);
1402 *p = cpu_to_be32(OP_RESTOREFH);
1403 hdr->nops++;
1404 hdr->replen += decode_restorefh_maxsz;
1405 }
1406
1407 static int
1408 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1409 {
1410 __be32 *p;
1411
1412 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1413 *p++ = cpu_to_be32(OP_SETATTR);
1414 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1415 p = reserve_space(xdr, 2*4);
1416 *p++ = cpu_to_be32(1);
1417 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1418 if (arg->acl_len % 4)
1419 return -EINVAL;
1420 p = reserve_space(xdr, 4);
1421 *p = cpu_to_be32(arg->acl_len);
1422 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1423 hdr->nops++;
1424 hdr->replen += decode_setacl_maxsz;
1425 return 0;
1426 }
1427
1428 static void
1429 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1430 {
1431 __be32 *p;
1432
1433 p = reserve_space(xdr, 4);
1434 *p = cpu_to_be32(OP_SAVEFH);
1435 hdr->nops++;
1436 hdr->replen += decode_savefh_maxsz;
1437 }
1438
1439 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1440 {
1441 __be32 *p;
1442
1443 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1444 *p++ = cpu_to_be32(OP_SETATTR);
1445 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1446 hdr->nops++;
1447 hdr->replen += decode_setattr_maxsz;
1448 encode_attrs(xdr, arg->iap, server);
1449 }
1450
1451 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1452 {
1453 __be32 *p;
1454
1455 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1456 *p++ = cpu_to_be32(OP_SETCLIENTID);
1457 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1458
1459 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1460 p = reserve_space(xdr, 4);
1461 *p = cpu_to_be32(setclientid->sc_prog);
1462 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1463 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1464 p = reserve_space(xdr, 4);
1465 *p = cpu_to_be32(setclientid->sc_cb_ident);
1466 hdr->nops++;
1467 hdr->replen += decode_setclientid_maxsz;
1468 }
1469
1470 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1471 {
1472 __be32 *p;
1473
1474 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1475 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1476 p = xdr_encode_hyper(p, client_state->cl_clientid);
1477 xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1478 hdr->nops++;
1479 hdr->replen += decode_setclientid_confirm_maxsz;
1480 }
1481
1482 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1483 {
1484 __be32 *p;
1485
1486 p = reserve_space(xdr, 4);
1487 *p = cpu_to_be32(OP_WRITE);
1488
1489 encode_stateid(xdr, args->context);
1490
1491 p = reserve_space(xdr, 16);
1492 p = xdr_encode_hyper(p, args->offset);
1493 *p++ = cpu_to_be32(args->stable);
1494 *p = cpu_to_be32(args->count);
1495
1496 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1497 hdr->nops++;
1498 hdr->replen += decode_write_maxsz;
1499 }
1500
1501 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1502 {
1503 __be32 *p;
1504
1505 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1506
1507 *p++ = cpu_to_be32(OP_DELEGRETURN);
1508 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1509 hdr->nops++;
1510 hdr->replen += decode_delegreturn_maxsz;
1511 }
1512
1513 #if defined(CONFIG_NFS_V4_1)
1514 /* NFSv4.1 operations */
1515 static void encode_exchange_id(struct xdr_stream *xdr,
1516 struct nfs41_exchange_id_args *args,
1517 struct compound_hdr *hdr)
1518 {
1519 __be32 *p;
1520
1521 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1522 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1523 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1524
1525 encode_string(xdr, args->id_len, args->id);
1526
1527 p = reserve_space(xdr, 12);
1528 *p++ = cpu_to_be32(args->flags);
1529 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1530 *p = cpu_to_be32(0); /* zero length implementation id array */
1531 hdr->nops++;
1532 hdr->replen += decode_exchange_id_maxsz;
1533 }
1534
1535 static void encode_create_session(struct xdr_stream *xdr,
1536 struct nfs41_create_session_args *args,
1537 struct compound_hdr *hdr)
1538 {
1539 __be32 *p;
1540 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1541 uint32_t len;
1542 struct nfs_client *clp = args->client;
1543
1544 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1545 clp->cl_ipaddr);
1546
1547 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1548 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1549 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1550 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1551 *p++ = cpu_to_be32(args->flags); /*flags */
1552
1553 /* Fore Channel */
1554 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1555 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1556 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1557 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1558 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1559 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1560 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1561
1562 /* Back Channel */
1563 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1564 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1565 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1566 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1567 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1568 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1569 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1570
1571 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1572 *p++ = cpu_to_be32(1);
1573 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1574
1575 /* authsys_parms rfc1831 */
1576 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1577 p = xdr_encode_opaque(p, machine_name, len);
1578 *p++ = cpu_to_be32(0); /* UID */
1579 *p++ = cpu_to_be32(0); /* GID */
1580 *p = cpu_to_be32(0); /* No more gids */
1581 hdr->nops++;
1582 hdr->replen += decode_create_session_maxsz;
1583 }
1584
1585 static void encode_destroy_session(struct xdr_stream *xdr,
1586 struct nfs4_session *session,
1587 struct compound_hdr *hdr)
1588 {
1589 __be32 *p;
1590 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1591 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1592 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1593 hdr->nops++;
1594 hdr->replen += decode_destroy_session_maxsz;
1595 }
1596 #endif /* CONFIG_NFS_V4_1 */
1597
1598 static void encode_sequence(struct xdr_stream *xdr,
1599 const struct nfs4_sequence_args *args,
1600 struct compound_hdr *hdr)
1601 {
1602 #if defined(CONFIG_NFS_V4_1)
1603 struct nfs4_session *session = args->sa_session;
1604 struct nfs4_slot_table *tp;
1605 struct nfs4_slot *slot;
1606 __be32 *p;
1607
1608 if (!session)
1609 return;
1610
1611 tp = &session->fc_slot_table;
1612
1613 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1614 slot = tp->slots + args->sa_slotid;
1615
1616 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1617 *p++ = cpu_to_be32(OP_SEQUENCE);
1618
1619 /*
1620 * Sessionid + seqid + slotid + max slotid + cache_this
1621 */
1622 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1623 "max_slotid=%d cache_this=%d\n",
1624 __func__,
1625 ((u32 *)session->sess_id.data)[0],
1626 ((u32 *)session->sess_id.data)[1],
1627 ((u32 *)session->sess_id.data)[2],
1628 ((u32 *)session->sess_id.data)[3],
1629 slot->seq_nr, args->sa_slotid,
1630 tp->highest_used_slotid, args->sa_cache_this);
1631 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1632 *p++ = cpu_to_be32(slot->seq_nr);
1633 *p++ = cpu_to_be32(args->sa_slotid);
1634 *p++ = cpu_to_be32(tp->highest_used_slotid);
1635 *p = cpu_to_be32(args->sa_cache_this);
1636 hdr->nops++;
1637 hdr->replen += decode_sequence_maxsz;
1638 #endif /* CONFIG_NFS_V4_1 */
1639 }
1640
1641 /*
1642 * END OF "GENERIC" ENCODE ROUTINES.
1643 */
1644
1645 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1646 {
1647 #if defined(CONFIG_NFS_V4_1)
1648 if (args->sa_session)
1649 return args->sa_session->clp->cl_minorversion;
1650 #endif /* CONFIG_NFS_V4_1 */
1651 return 0;
1652 }
1653
1654 /*
1655 * Encode an ACCESS request
1656 */
1657 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1658 {
1659 struct xdr_stream xdr;
1660 struct compound_hdr hdr = {
1661 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1662 };
1663
1664 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1665 encode_compound_hdr(&xdr, req, &hdr);
1666 encode_sequence(&xdr, &args->seq_args, &hdr);
1667 encode_putfh(&xdr, args->fh, &hdr);
1668 encode_access(&xdr, args->access, &hdr);
1669 encode_getfattr(&xdr, args->bitmask, &hdr);
1670 encode_nops(&hdr);
1671 return 0;
1672 }
1673
1674 /*
1675 * Encode LOOKUP request
1676 */
1677 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1678 {
1679 struct xdr_stream xdr;
1680 struct compound_hdr hdr = {
1681 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1682 };
1683
1684 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1685 encode_compound_hdr(&xdr, req, &hdr);
1686 encode_sequence(&xdr, &args->seq_args, &hdr);
1687 encode_putfh(&xdr, args->dir_fh, &hdr);
1688 encode_lookup(&xdr, args->name, &hdr);
1689 encode_getfh(&xdr, &hdr);
1690 encode_getfattr(&xdr, args->bitmask, &hdr);
1691 encode_nops(&hdr);
1692 return 0;
1693 }
1694
1695 /*
1696 * Encode LOOKUP_ROOT request
1697 */
1698 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1699 {
1700 struct xdr_stream xdr;
1701 struct compound_hdr hdr = {
1702 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1703 };
1704
1705 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1706 encode_compound_hdr(&xdr, req, &hdr);
1707 encode_sequence(&xdr, &args->seq_args, &hdr);
1708 encode_putrootfh(&xdr, &hdr);
1709 encode_getfh(&xdr, &hdr);
1710 encode_getfattr(&xdr, args->bitmask, &hdr);
1711 encode_nops(&hdr);
1712 return 0;
1713 }
1714
1715 /*
1716 * Encode REMOVE request
1717 */
1718 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1719 {
1720 struct xdr_stream xdr;
1721 struct compound_hdr hdr = {
1722 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1723 };
1724
1725 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1726 encode_compound_hdr(&xdr, req, &hdr);
1727 encode_sequence(&xdr, &args->seq_args, &hdr);
1728 encode_putfh(&xdr, args->fh, &hdr);
1729 encode_remove(&xdr, &args->name, &hdr);
1730 encode_getfattr(&xdr, args->bitmask, &hdr);
1731 encode_nops(&hdr);
1732 return 0;
1733 }
1734
1735 /*
1736 * Encode RENAME request
1737 */
1738 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1739 {
1740 struct xdr_stream xdr;
1741 struct compound_hdr hdr = {
1742 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1743 };
1744
1745 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746 encode_compound_hdr(&xdr, req, &hdr);
1747 encode_sequence(&xdr, &args->seq_args, &hdr);
1748 encode_putfh(&xdr, args->old_dir, &hdr);
1749 encode_savefh(&xdr, &hdr);
1750 encode_putfh(&xdr, args->new_dir, &hdr);
1751 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1752 encode_getfattr(&xdr, args->bitmask, &hdr);
1753 encode_restorefh(&xdr, &hdr);
1754 encode_getfattr(&xdr, args->bitmask, &hdr);
1755 encode_nops(&hdr);
1756 return 0;
1757 }
1758
1759 /*
1760 * Encode LINK request
1761 */
1762 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1763 {
1764 struct xdr_stream xdr;
1765 struct compound_hdr hdr = {
1766 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1767 };
1768
1769 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770 encode_compound_hdr(&xdr, req, &hdr);
1771 encode_sequence(&xdr, &args->seq_args, &hdr);
1772 encode_putfh(&xdr, args->fh, &hdr);
1773 encode_savefh(&xdr, &hdr);
1774 encode_putfh(&xdr, args->dir_fh, &hdr);
1775 encode_link(&xdr, args->name, &hdr);
1776 encode_getfattr(&xdr, args->bitmask, &hdr);
1777 encode_restorefh(&xdr, &hdr);
1778 encode_getfattr(&xdr, args->bitmask, &hdr);
1779 encode_nops(&hdr);
1780 return 0;
1781 }
1782
1783 /*
1784 * Encode CREATE request
1785 */
1786 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1787 {
1788 struct xdr_stream xdr;
1789 struct compound_hdr hdr = {
1790 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1791 };
1792
1793 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1794 encode_compound_hdr(&xdr, req, &hdr);
1795 encode_sequence(&xdr, &args->seq_args, &hdr);
1796 encode_putfh(&xdr, args->dir_fh, &hdr);
1797 encode_savefh(&xdr, &hdr);
1798 encode_create(&xdr, args, &hdr);
1799 encode_getfh(&xdr, &hdr);
1800 encode_getfattr(&xdr, args->bitmask, &hdr);
1801 encode_restorefh(&xdr, &hdr);
1802 encode_getfattr(&xdr, args->bitmask, &hdr);
1803 encode_nops(&hdr);
1804 return 0;
1805 }
1806
1807 /*
1808 * Encode SYMLINK request
1809 */
1810 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1811 {
1812 return nfs4_xdr_enc_create(req, p, args);
1813 }
1814
1815 /*
1816 * Encode GETATTR request
1817 */
1818 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1819 {
1820 struct xdr_stream xdr;
1821 struct compound_hdr hdr = {
1822 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1823 };
1824
1825 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1826 encode_compound_hdr(&xdr, req, &hdr);
1827 encode_sequence(&xdr, &args->seq_args, &hdr);
1828 encode_putfh(&xdr, args->fh, &hdr);
1829 encode_getfattr(&xdr, args->bitmask, &hdr);
1830 encode_nops(&hdr);
1831 return 0;
1832 }
1833
1834 /*
1835 * Encode a CLOSE request
1836 */
1837 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1838 {
1839 struct xdr_stream xdr;
1840 struct compound_hdr hdr = {
1841 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842 };
1843
1844 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845 encode_compound_hdr(&xdr, req, &hdr);
1846 encode_sequence(&xdr, &args->seq_args, &hdr);
1847 encode_putfh(&xdr, args->fh, &hdr);
1848 encode_close(&xdr, args, &hdr);
1849 encode_getfattr(&xdr, args->bitmask, &hdr);
1850 encode_nops(&hdr);
1851 return 0;
1852 }
1853
1854 /*
1855 * Encode an OPEN request
1856 */
1857 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1858 {
1859 struct xdr_stream xdr;
1860 struct compound_hdr hdr = {
1861 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1862 };
1863
1864 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1865 encode_compound_hdr(&xdr, req, &hdr);
1866 encode_sequence(&xdr, &args->seq_args, &hdr);
1867 encode_putfh(&xdr, args->fh, &hdr);
1868 encode_savefh(&xdr, &hdr);
1869 encode_open(&xdr, args, &hdr);
1870 encode_getfh(&xdr, &hdr);
1871 encode_getfattr(&xdr, args->bitmask, &hdr);
1872 encode_restorefh(&xdr, &hdr);
1873 encode_getfattr(&xdr, args->bitmask, &hdr);
1874 encode_nops(&hdr);
1875 return 0;
1876 }
1877
1878 /*
1879 * Encode an OPEN_CONFIRM request
1880 */
1881 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1882 {
1883 struct xdr_stream xdr;
1884 struct compound_hdr hdr = {
1885 .nops = 0,
1886 };
1887
1888 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1889 encode_compound_hdr(&xdr, req, &hdr);
1890 encode_putfh(&xdr, args->fh, &hdr);
1891 encode_open_confirm(&xdr, args, &hdr);
1892 encode_nops(&hdr);
1893 return 0;
1894 }
1895
1896 /*
1897 * Encode an OPEN request with no attributes.
1898 */
1899 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1900 {
1901 struct xdr_stream xdr;
1902 struct compound_hdr hdr = {
1903 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1904 };
1905
1906 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1907 encode_compound_hdr(&xdr, req, &hdr);
1908 encode_sequence(&xdr, &args->seq_args, &hdr);
1909 encode_putfh(&xdr, args->fh, &hdr);
1910 encode_open(&xdr, args, &hdr);
1911 encode_getfattr(&xdr, args->bitmask, &hdr);
1912 encode_nops(&hdr);
1913 return 0;
1914 }
1915
1916 /*
1917 * Encode an OPEN_DOWNGRADE request
1918 */
1919 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1920 {
1921 struct xdr_stream xdr;
1922 struct compound_hdr hdr = {
1923 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1924 };
1925
1926 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1927 encode_compound_hdr(&xdr, req, &hdr);
1928 encode_sequence(&xdr, &args->seq_args, &hdr);
1929 encode_putfh(&xdr, args->fh, &hdr);
1930 encode_open_downgrade(&xdr, args, &hdr);
1931 encode_getfattr(&xdr, args->bitmask, &hdr);
1932 encode_nops(&hdr);
1933 return 0;
1934 }
1935
1936 /*
1937 * Encode a LOCK request
1938 */
1939 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1940 {
1941 struct xdr_stream xdr;
1942 struct compound_hdr hdr = {
1943 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1944 };
1945
1946 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1947 encode_compound_hdr(&xdr, req, &hdr);
1948 encode_sequence(&xdr, &args->seq_args, &hdr);
1949 encode_putfh(&xdr, args->fh, &hdr);
1950 encode_lock(&xdr, args, &hdr);
1951 encode_nops(&hdr);
1952 return 0;
1953 }
1954
1955 /*
1956 * Encode a LOCKT request
1957 */
1958 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1959 {
1960 struct xdr_stream xdr;
1961 struct compound_hdr hdr = {
1962 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1963 };
1964
1965 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966 encode_compound_hdr(&xdr, req, &hdr);
1967 encode_sequence(&xdr, &args->seq_args, &hdr);
1968 encode_putfh(&xdr, args->fh, &hdr);
1969 encode_lockt(&xdr, args, &hdr);
1970 encode_nops(&hdr);
1971 return 0;
1972 }
1973
1974 /*
1975 * Encode a LOCKU request
1976 */
1977 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1978 {
1979 struct xdr_stream xdr;
1980 struct compound_hdr hdr = {
1981 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1982 };
1983
1984 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1985 encode_compound_hdr(&xdr, req, &hdr);
1986 encode_sequence(&xdr, &args->seq_args, &hdr);
1987 encode_putfh(&xdr, args->fh, &hdr);
1988 encode_locku(&xdr, args, &hdr);
1989 encode_nops(&hdr);
1990 return 0;
1991 }
1992
1993 /*
1994 * Encode a READLINK request
1995 */
1996 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1997 {
1998 struct xdr_stream xdr;
1999 struct compound_hdr hdr = {
2000 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2001 };
2002
2003 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2004 encode_compound_hdr(&xdr, req, &hdr);
2005 encode_sequence(&xdr, &args->seq_args, &hdr);
2006 encode_putfh(&xdr, args->fh, &hdr);
2007 encode_readlink(&xdr, args, req, &hdr);
2008
2009 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2010 args->pgbase, args->pglen);
2011 encode_nops(&hdr);
2012 return 0;
2013 }
2014
2015 /*
2016 * Encode a READDIR request
2017 */
2018 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2019 {
2020 struct xdr_stream xdr;
2021 struct compound_hdr hdr = {
2022 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023 };
2024
2025 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026 encode_compound_hdr(&xdr, req, &hdr);
2027 encode_sequence(&xdr, &args->seq_args, &hdr);
2028 encode_putfh(&xdr, args->fh, &hdr);
2029 encode_readdir(&xdr, args, req, &hdr);
2030
2031 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2032 args->pgbase, args->count);
2033 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2034 __func__, hdr.replen << 2, args->pages,
2035 args->pgbase, args->count);
2036 encode_nops(&hdr);
2037 return 0;
2038 }
2039
2040 /*
2041 * Encode a READ request
2042 */
2043 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2044 {
2045 struct xdr_stream xdr;
2046 struct compound_hdr hdr = {
2047 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2048 };
2049
2050 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2051 encode_compound_hdr(&xdr, req, &hdr);
2052 encode_sequence(&xdr, &args->seq_args, &hdr);
2053 encode_putfh(&xdr, args->fh, &hdr);
2054 encode_read(&xdr, args, &hdr);
2055
2056 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2057 args->pages, args->pgbase, args->count);
2058 req->rq_rcv_buf.flags |= XDRBUF_READ;
2059 encode_nops(&hdr);
2060 return 0;
2061 }
2062
2063 /*
2064 * Encode an SETATTR request
2065 */
2066 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2067 {
2068 struct xdr_stream xdr;
2069 struct compound_hdr hdr = {
2070 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2071 };
2072
2073 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2074 encode_compound_hdr(&xdr, req, &hdr);
2075 encode_sequence(&xdr, &args->seq_args, &hdr);
2076 encode_putfh(&xdr, args->fh, &hdr);
2077 encode_setattr(&xdr, args, args->server, &hdr);
2078 encode_getfattr(&xdr, args->bitmask, &hdr);
2079 encode_nops(&hdr);
2080 return 0;
2081 }
2082
2083 /*
2084 * Encode a GETACL request
2085 */
2086 static int
2087 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2088 struct nfs_getaclargs *args)
2089 {
2090 struct xdr_stream xdr;
2091 struct compound_hdr hdr = {
2092 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093 };
2094 uint32_t replen;
2095
2096 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2097 encode_compound_hdr(&xdr, req, &hdr);
2098 encode_sequence(&xdr, &args->seq_args, &hdr);
2099 encode_putfh(&xdr, args->fh, &hdr);
2100 replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2101 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2102
2103 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2104 args->acl_pages, args->acl_pgbase, args->acl_len);
2105 encode_nops(&hdr);
2106 return 0;
2107 }
2108
2109 /*
2110 * Encode a WRITE request
2111 */
2112 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2113 {
2114 struct xdr_stream xdr;
2115 struct compound_hdr hdr = {
2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117 };
2118
2119 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2120 encode_compound_hdr(&xdr, req, &hdr);
2121 encode_sequence(&xdr, &args->seq_args, &hdr);
2122 encode_putfh(&xdr, args->fh, &hdr);
2123 encode_write(&xdr, args, &hdr);
2124 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2125 encode_getfattr(&xdr, args->bitmask, &hdr);
2126 encode_nops(&hdr);
2127 return 0;
2128 }
2129
2130 /*
2131 * a COMMIT request
2132 */
2133 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2134 {
2135 struct xdr_stream xdr;
2136 struct compound_hdr hdr = {
2137 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138 };
2139
2140 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2141 encode_compound_hdr(&xdr, req, &hdr);
2142 encode_sequence(&xdr, &args->seq_args, &hdr);
2143 encode_putfh(&xdr, args->fh, &hdr);
2144 encode_commit(&xdr, args, &hdr);
2145 encode_getfattr(&xdr, args->bitmask, &hdr);
2146 encode_nops(&hdr);
2147 return 0;
2148 }
2149
2150 /*
2151 * FSINFO request
2152 */
2153 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2154 {
2155 struct xdr_stream xdr;
2156 struct compound_hdr hdr = {
2157 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2158 };
2159
2160 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2161 encode_compound_hdr(&xdr, req, &hdr);
2162 encode_sequence(&xdr, &args->seq_args, &hdr);
2163 encode_putfh(&xdr, args->fh, &hdr);
2164 encode_fsinfo(&xdr, args->bitmask, &hdr);
2165 encode_nops(&hdr);
2166 return 0;
2167 }
2168
2169 /*
2170 * a PATHCONF request
2171 */
2172 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2173 {
2174 struct xdr_stream xdr;
2175 struct compound_hdr hdr = {
2176 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177 };
2178
2179 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2180 encode_compound_hdr(&xdr, req, &hdr);
2181 encode_sequence(&xdr, &args->seq_args, &hdr);
2182 encode_putfh(&xdr, args->fh, &hdr);
2183 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2184 &hdr);
2185 encode_nops(&hdr);
2186 return 0;
2187 }
2188
2189 /*
2190 * a STATFS request
2191 */
2192 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2193 {
2194 struct xdr_stream xdr;
2195 struct compound_hdr hdr = {
2196 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197 };
2198
2199 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2200 encode_compound_hdr(&xdr, req, &hdr);
2201 encode_sequence(&xdr, &args->seq_args, &hdr);
2202 encode_putfh(&xdr, args->fh, &hdr);
2203 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2204 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2205 encode_nops(&hdr);
2206 return 0;
2207 }
2208
2209 /*
2210 * GETATTR_BITMAP request
2211 */
2212 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2213 struct nfs4_server_caps_arg *args)
2214 {
2215 struct xdr_stream xdr;
2216 struct compound_hdr hdr = {
2217 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218 };
2219
2220 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2221 encode_compound_hdr(&xdr, req, &hdr);
2222 encode_sequence(&xdr, &args->seq_args, &hdr);
2223 encode_putfh(&xdr, args->fhandle, &hdr);
2224 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2225 FATTR4_WORD0_LINK_SUPPORT|
2226 FATTR4_WORD0_SYMLINK_SUPPORT|
2227 FATTR4_WORD0_ACLSUPPORT, &hdr);
2228 encode_nops(&hdr);
2229 return 0;
2230 }
2231
2232 /*
2233 * a RENEW request
2234 */
2235 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2236 {
2237 struct xdr_stream xdr;
2238 struct compound_hdr hdr = {
2239 .nops = 0,
2240 };
2241
2242 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243 encode_compound_hdr(&xdr, req, &hdr);
2244 encode_renew(&xdr, clp, &hdr);
2245 encode_nops(&hdr);
2246 return 0;
2247 }
2248
2249 /*
2250 * a SETCLIENTID request
2251 */
2252 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2253 {
2254 struct xdr_stream xdr;
2255 struct compound_hdr hdr = {
2256 .nops = 0,
2257 };
2258
2259 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2260 encode_compound_hdr(&xdr, req, &hdr);
2261 encode_setclientid(&xdr, sc, &hdr);
2262 encode_nops(&hdr);
2263 return 0;
2264 }
2265
2266 /*
2267 * a SETCLIENTID_CONFIRM request
2268 */
2269 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2270 {
2271 struct xdr_stream xdr;
2272 struct compound_hdr hdr = {
2273 .nops = 0,
2274 };
2275 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2276
2277 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2278 encode_compound_hdr(&xdr, req, &hdr);
2279 encode_setclientid_confirm(&xdr, clp, &hdr);
2280 encode_putrootfh(&xdr, &hdr);
2281 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2282 encode_nops(&hdr);
2283 return 0;
2284 }
2285
2286 /*
2287 * DELEGRETURN request
2288 */
2289 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2290 {
2291 struct xdr_stream xdr;
2292 struct compound_hdr hdr = {
2293 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294 };
2295
2296 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2297 encode_compound_hdr(&xdr, req, &hdr);
2298 encode_sequence(&xdr, &args->seq_args, &hdr);
2299 encode_putfh(&xdr, args->fhandle, &hdr);
2300 encode_delegreturn(&xdr, args->stateid, &hdr);
2301 encode_getfattr(&xdr, args->bitmask, &hdr);
2302 encode_nops(&hdr);
2303 return 0;
2304 }
2305
2306 /*
2307 * Encode FS_LOCATIONS request
2308 */
2309 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2310 {
2311 struct xdr_stream xdr;
2312 struct compound_hdr hdr = {
2313 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314 };
2315 uint32_t replen;
2316
2317 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2318 encode_compound_hdr(&xdr, req, &hdr);
2319 encode_sequence(&xdr, &args->seq_args, &hdr);
2320 encode_putfh(&xdr, args->dir_fh, &hdr);
2321 encode_lookup(&xdr, args->name, &hdr);
2322 replen = hdr.replen; /* get the attribute into args->page */
2323 encode_fs_locations(&xdr, args->bitmask, &hdr);
2324
2325 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2326 0, PAGE_SIZE);
2327 encode_nops(&hdr);
2328 return 0;
2329 }
2330
2331 #if defined(CONFIG_NFS_V4_1)
2332 /*
2333 * EXCHANGE_ID request
2334 */
2335 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2336 struct nfs41_exchange_id_args *args)
2337 {
2338 struct xdr_stream xdr;
2339 struct compound_hdr hdr = {
2340 .minorversion = args->client->cl_minorversion,
2341 };
2342
2343 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2344 encode_compound_hdr(&xdr, req, &hdr);
2345 encode_exchange_id(&xdr, args, &hdr);
2346 encode_nops(&hdr);
2347 return 0;
2348 }
2349
2350 /*
2351 * a CREATE_SESSION request
2352 */
2353 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2354 struct nfs41_create_session_args *args)
2355 {
2356 struct xdr_stream xdr;
2357 struct compound_hdr hdr = {
2358 .minorversion = args->client->cl_minorversion,
2359 };
2360
2361 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2362 encode_compound_hdr(&xdr, req, &hdr);
2363 encode_create_session(&xdr, args, &hdr);
2364 encode_nops(&hdr);
2365 return 0;
2366 }
2367
2368 /*
2369 * a DESTROY_SESSION request
2370 */
2371 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2372 struct nfs4_session *session)
2373 {
2374 struct xdr_stream xdr;
2375 struct compound_hdr hdr = {
2376 .minorversion = session->clp->cl_minorversion,
2377 };
2378
2379 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2380 encode_compound_hdr(&xdr, req, &hdr);
2381 encode_destroy_session(&xdr, session, &hdr);
2382 encode_nops(&hdr);
2383 return 0;
2384 }
2385
2386 /*
2387 * a SEQUENCE request
2388 */
2389 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2390 struct nfs4_sequence_args *args)
2391 {
2392 struct xdr_stream xdr;
2393 struct compound_hdr hdr = {
2394 .minorversion = nfs4_xdr_minorversion(args),
2395 };
2396
2397 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2398 encode_compound_hdr(&xdr, req, &hdr);
2399 encode_sequence(&xdr, args, &hdr);
2400 encode_nops(&hdr);
2401 return 0;
2402 }
2403
2404 /*
2405 * a GET_LEASE_TIME request
2406 */
2407 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2408 struct nfs4_get_lease_time_args *args)
2409 {
2410 struct xdr_stream xdr;
2411 struct compound_hdr hdr = {
2412 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2413 };
2414 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2415
2416 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2417 encode_compound_hdr(&xdr, req, &hdr);
2418 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2419 encode_putrootfh(&xdr, &hdr);
2420 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2421 encode_nops(&hdr);
2422 return 0;
2423 }
2424 #endif /* CONFIG_NFS_V4_1 */
2425
2426 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2427 {
2428 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2429 "Remaining buffer length is %tu words.\n",
2430 func, xdr->end - xdr->p);
2431 }
2432
2433 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2434 {
2435 __be32 *p;
2436
2437 p = xdr_inline_decode(xdr, 4);
2438 if (unlikely(!p))
2439 goto out_overflow;
2440 *len = be32_to_cpup(p);
2441 p = xdr_inline_decode(xdr, *len);
2442 if (unlikely(!p))
2443 goto out_overflow;
2444 *string = (char *)p;
2445 return 0;
2446 out_overflow:
2447 print_overflow_msg(__func__, xdr);
2448 return -EIO;
2449 }
2450
2451 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2452 {
2453 __be32 *p;
2454
2455 p = xdr_inline_decode(xdr, 8);
2456 if (unlikely(!p))
2457 goto out_overflow;
2458 hdr->status = be32_to_cpup(p++);
2459 hdr->taglen = be32_to_cpup(p);
2460
2461 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2462 if (unlikely(!p))
2463 goto out_overflow;
2464 hdr->tag = (char *)p;
2465 p += XDR_QUADLEN(hdr->taglen);
2466 hdr->nops = be32_to_cpup(p);
2467 if (unlikely(hdr->nops < 1))
2468 return nfs4_stat_to_errno(hdr->status);
2469 return 0;
2470 out_overflow:
2471 print_overflow_msg(__func__, xdr);
2472 return -EIO;
2473 }
2474
2475 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2476 {
2477 __be32 *p;
2478 uint32_t opnum;
2479 int32_t nfserr;
2480
2481 p = xdr_inline_decode(xdr, 8);
2482 if (unlikely(!p))
2483 goto out_overflow;
2484 opnum = be32_to_cpup(p++);
2485 if (opnum != expected) {
2486 dprintk("nfs: Server returned operation"
2487 " %d but we issued a request for %d\n",
2488 opnum, expected);
2489 return -EIO;
2490 }
2491 nfserr = be32_to_cpup(p);
2492 if (nfserr != NFS_OK)
2493 return nfs4_stat_to_errno(nfserr);
2494 return 0;
2495 out_overflow:
2496 print_overflow_msg(__func__, xdr);
2497 return -EIO;
2498 }
2499
2500 /* Dummy routine */
2501 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2502 {
2503 __be32 *p;
2504 unsigned int strlen;
2505 char *str;
2506
2507 p = xdr_inline_decode(xdr, 12);
2508 if (likely(p))
2509 return decode_opaque_inline(xdr, &strlen, &str);
2510 print_overflow_msg(__func__, xdr);
2511 return -EIO;
2512 }
2513
2514 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2515 {
2516 uint32_t bmlen;
2517 __be32 *p;
2518
2519 p = xdr_inline_decode(xdr, 4);
2520 if (unlikely(!p))
2521 goto out_overflow;
2522 bmlen = be32_to_cpup(p);
2523
2524 bitmap[0] = bitmap[1] = 0;
2525 p = xdr_inline_decode(xdr, (bmlen << 2));
2526 if (unlikely(!p))
2527 goto out_overflow;
2528 if (bmlen > 0) {
2529 bitmap[0] = be32_to_cpup(p++);
2530 if (bmlen > 1)
2531 bitmap[1] = be32_to_cpup(p);
2532 }
2533 return 0;
2534 out_overflow:
2535 print_overflow_msg(__func__, xdr);
2536 return -EIO;
2537 }
2538
2539 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2540 {
2541 __be32 *p;
2542
2543 p = xdr_inline_decode(xdr, 4);
2544 if (unlikely(!p))
2545 goto out_overflow;
2546 *attrlen = be32_to_cpup(p);
2547 *savep = xdr->p;
2548 return 0;
2549 out_overflow:
2550 print_overflow_msg(__func__, xdr);
2551 return -EIO;
2552 }
2553
2554 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2555 {
2556 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2557 decode_attr_bitmap(xdr, bitmask);
2558 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2559 } else
2560 bitmask[0] = bitmask[1] = 0;
2561 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2562 return 0;
2563 }
2564
2565 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2566 {
2567 __be32 *p;
2568 int ret = 0;
2569
2570 *type = 0;
2571 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2572 return -EIO;
2573 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2574 p = xdr_inline_decode(xdr, 4);
2575 if (unlikely(!p))
2576 goto out_overflow;
2577 *type = be32_to_cpup(p);
2578 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2579 dprintk("%s: bad type %d\n", __func__, *type);
2580 return -EIO;
2581 }
2582 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2583 ret = NFS_ATTR_FATTR_TYPE;
2584 }
2585 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2586 return ret;
2587 out_overflow:
2588 print_overflow_msg(__func__, xdr);
2589 return -EIO;
2590 }
2591
2592 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2593 {
2594 __be32 *p;
2595 int ret = 0;
2596
2597 *change = 0;
2598 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2599 return -EIO;
2600 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2601 p = xdr_inline_decode(xdr, 8);
2602 if (unlikely(!p))
2603 goto out_overflow;
2604 xdr_decode_hyper(p, change);
2605 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2606 ret = NFS_ATTR_FATTR_CHANGE;
2607 }
2608 dprintk("%s: change attribute=%Lu\n", __func__,
2609 (unsigned long long)*change);
2610 return ret;
2611 out_overflow:
2612 print_overflow_msg(__func__, xdr);
2613 return -EIO;
2614 }
2615
2616 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2617 {
2618 __be32 *p;
2619 int ret = 0;
2620
2621 *size = 0;
2622 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2623 return -EIO;
2624 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2625 p = xdr_inline_decode(xdr, 8);
2626 if (unlikely(!p))
2627 goto out_overflow;
2628 xdr_decode_hyper(p, size);
2629 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2630 ret = NFS_ATTR_FATTR_SIZE;
2631 }
2632 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2633 return ret;
2634 out_overflow:
2635 print_overflow_msg(__func__, xdr);
2636 return -EIO;
2637 }
2638
2639 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2640 {
2641 __be32 *p;
2642
2643 *res = 0;
2644 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2645 return -EIO;
2646 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2647 p = xdr_inline_decode(xdr, 4);
2648 if (unlikely(!p))
2649 goto out_overflow;
2650 *res = be32_to_cpup(p);
2651 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2652 }
2653 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2654 return 0;
2655 out_overflow:
2656 print_overflow_msg(__func__, xdr);
2657 return -EIO;
2658 }
2659
2660 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2661 {
2662 __be32 *p;
2663
2664 *res = 0;
2665 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2666 return -EIO;
2667 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2668 p = xdr_inline_decode(xdr, 4);
2669 if (unlikely(!p))
2670 goto out_overflow;
2671 *res = be32_to_cpup(p);
2672 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2673 }
2674 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2675 return 0;
2676 out_overflow:
2677 print_overflow_msg(__func__, xdr);
2678 return -EIO;
2679 }
2680
2681 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2682 {
2683 __be32 *p;
2684 int ret = 0;
2685
2686 fsid->major = 0;
2687 fsid->minor = 0;
2688 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2689 return -EIO;
2690 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2691 p = xdr_inline_decode(xdr, 16);
2692 if (unlikely(!p))
2693 goto out_overflow;
2694 p = xdr_decode_hyper(p, &fsid->major);
2695 xdr_decode_hyper(p, &fsid->minor);
2696 bitmap[0] &= ~FATTR4_WORD0_FSID;
2697 ret = NFS_ATTR_FATTR_FSID;
2698 }
2699 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2700 (unsigned long long)fsid->major,
2701 (unsigned long long)fsid->minor);
2702 return ret;
2703 out_overflow:
2704 print_overflow_msg(__func__, xdr);
2705 return -EIO;
2706 }
2707
2708 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2709 {
2710 __be32 *p;
2711
2712 *res = 60;
2713 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2714 return -EIO;
2715 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2716 p = xdr_inline_decode(xdr, 4);
2717 if (unlikely(!p))
2718 goto out_overflow;
2719 *res = be32_to_cpup(p);
2720 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2721 }
2722 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2723 return 0;
2724 out_overflow:
2725 print_overflow_msg(__func__, xdr);
2726 return -EIO;
2727 }
2728
2729 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2730 {
2731 __be32 *p;
2732
2733 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2734 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2735 return -EIO;
2736 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2737 p = xdr_inline_decode(xdr, 4);
2738 if (unlikely(!p))
2739 goto out_overflow;
2740 *res = be32_to_cpup(p);
2741 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2742 }
2743 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2744 return 0;
2745 out_overflow:
2746 print_overflow_msg(__func__, xdr);
2747 return -EIO;
2748 }
2749
2750 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2751 {
2752 __be32 *p;
2753 int ret = 0;
2754
2755 *fileid = 0;
2756 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2757 return -EIO;
2758 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2759 p = xdr_inline_decode(xdr, 8);
2760 if (unlikely(!p))
2761 goto out_overflow;
2762 xdr_decode_hyper(p, fileid);
2763 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2764 ret = NFS_ATTR_FATTR_FILEID;
2765 }
2766 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2767 return ret;
2768 out_overflow:
2769 print_overflow_msg(__func__, xdr);
2770 return -EIO;
2771 }
2772
2773 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2774 {
2775 __be32 *p;
2776 int ret = 0;
2777
2778 *fileid = 0;
2779 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2780 return -EIO;
2781 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2782 p = xdr_inline_decode(xdr, 8);
2783 if (unlikely(!p))
2784 goto out_overflow;
2785 xdr_decode_hyper(p, fileid);
2786 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2787 ret = NFS_ATTR_FATTR_FILEID;
2788 }
2789 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2790 return ret;
2791 out_overflow:
2792 print_overflow_msg(__func__, xdr);
2793 return -EIO;
2794 }
2795
2796 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2797 {
2798 __be32 *p;
2799 int status = 0;
2800
2801 *res = 0;
2802 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2803 return -EIO;
2804 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2805 p = xdr_inline_decode(xdr, 8);
2806 if (unlikely(!p))
2807 goto out_overflow;
2808 xdr_decode_hyper(p, res);
2809 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2810 }
2811 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2812 return status;
2813 out_overflow:
2814 print_overflow_msg(__func__, xdr);
2815 return -EIO;
2816 }
2817
2818 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2819 {
2820 __be32 *p;
2821 int status = 0;
2822
2823 *res = 0;
2824 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2825 return -EIO;
2826 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2827 p = xdr_inline_decode(xdr, 8);
2828 if (unlikely(!p))
2829 goto out_overflow;
2830 xdr_decode_hyper(p, res);
2831 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2832 }
2833 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2834 return status;
2835 out_overflow:
2836 print_overflow_msg(__func__, xdr);
2837 return -EIO;
2838 }
2839
2840 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2841 {
2842 __be32 *p;
2843 int status = 0;
2844
2845 *res = 0;
2846 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2847 return -EIO;
2848 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2849 p = xdr_inline_decode(xdr, 8);
2850 if (unlikely(!p))
2851 goto out_overflow;
2852 xdr_decode_hyper(p, res);
2853 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2854 }
2855 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2856 return status;
2857 out_overflow:
2858 print_overflow_msg(__func__, xdr);
2859 return -EIO;
2860 }
2861
2862 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2863 {
2864 u32 n;
2865 __be32 *p;
2866 int status = 0;
2867
2868 p = xdr_inline_decode(xdr, 4);
2869 if (unlikely(!p))
2870 goto out_overflow;
2871 n = be32_to_cpup(p);
2872 if (n == 0)
2873 goto root_path;
2874 dprintk("path ");
2875 path->ncomponents = 0;
2876 while (path->ncomponents < n) {
2877 struct nfs4_string *component = &path->components[path->ncomponents];
2878 status = decode_opaque_inline(xdr, &component->len, &component->data);
2879 if (unlikely(status != 0))
2880 goto out_eio;
2881 if (path->ncomponents != n)
2882 dprintk("/");
2883 dprintk("%s", component->data);
2884 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2885 path->ncomponents++;
2886 else {
2887 dprintk("cannot parse %d components in path\n", n);
2888 goto out_eio;
2889 }
2890 }
2891 out:
2892 dprintk("\n");
2893 return status;
2894 root_path:
2895 /* a root pathname is sent as a zero component4 */
2896 path->ncomponents = 1;
2897 path->components[0].len=0;
2898 path->components[0].data=NULL;
2899 dprintk("path /\n");
2900 goto out;
2901 out_eio:
2902 dprintk(" status %d", status);
2903 status = -EIO;
2904 goto out;
2905 out_overflow:
2906 print_overflow_msg(__func__, xdr);
2907 return -EIO;
2908 }
2909
2910 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2911 {
2912 int n;
2913 __be32 *p;
2914 int status = -EIO;
2915
2916 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2917 goto out;
2918 status = 0;
2919 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2920 goto out;
2921 dprintk("%s: fsroot ", __func__);
2922 status = decode_pathname(xdr, &res->fs_path);
2923 if (unlikely(status != 0))
2924 goto out;
2925 p = xdr_inline_decode(xdr, 4);
2926 if (unlikely(!p))
2927 goto out_overflow;
2928 n = be32_to_cpup(p);
2929 if (n <= 0)
2930 goto out_eio;
2931 res->nlocations = 0;
2932 while (res->nlocations < n) {
2933 u32 m;
2934 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2935
2936 p = xdr_inline_decode(xdr, 4);
2937 if (unlikely(!p))
2938 goto out_overflow;
2939 m = be32_to_cpup(p);
2940
2941 loc->nservers = 0;
2942 dprintk("%s: servers ", __func__);
2943 while (loc->nservers < m) {
2944 struct nfs4_string *server = &loc->servers[loc->nservers];
2945 status = decode_opaque_inline(xdr, &server->len, &server->data);
2946 if (unlikely(status != 0))
2947 goto out_eio;
2948 dprintk("%s ", server->data);
2949 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2950 loc->nservers++;
2951 else {
2952 unsigned int i;
2953 dprintk("%s: using first %u of %u servers "
2954 "returned for location %u\n",
2955 __func__,
2956 NFS4_FS_LOCATION_MAXSERVERS,
2957 m, res->nlocations);
2958 for (i = loc->nservers; i < m; i++) {
2959 unsigned int len;
2960 char *data;
2961 status = decode_opaque_inline(xdr, &len, &data);
2962 if (unlikely(status != 0))
2963 goto out_eio;
2964 }
2965 }
2966 }
2967 status = decode_pathname(xdr, &loc->rootpath);
2968 if (unlikely(status != 0))
2969 goto out_eio;
2970 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2971 res->nlocations++;
2972 }
2973 if (res->nlocations != 0)
2974 status = NFS_ATTR_FATTR_V4_REFERRAL;
2975 out:
2976 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2977 return status;
2978 out_overflow:
2979 print_overflow_msg(__func__, xdr);
2980 out_eio:
2981 status = -EIO;
2982 goto out;
2983 }
2984
2985 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2986 {
2987 __be32 *p;
2988 int status = 0;
2989
2990 *res = 0;
2991 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2992 return -EIO;
2993 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2994 p = xdr_inline_decode(xdr, 8);
2995 if (unlikely(!p))
2996 goto out_overflow;
2997 xdr_decode_hyper(p, res);
2998 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2999 }
3000 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3001 return status;
3002 out_overflow:
3003 print_overflow_msg(__func__, xdr);
3004 return -EIO;
3005 }
3006
3007 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3008 {
3009 __be32 *p;
3010 int status = 0;
3011
3012 *maxlink = 1;
3013 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3014 return -EIO;
3015 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3016 p = xdr_inline_decode(xdr, 4);
3017 if (unlikely(!p))
3018 goto out_overflow;
3019 *maxlink = be32_to_cpup(p);
3020 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3021 }
3022 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3023 return status;
3024 out_overflow:
3025 print_overflow_msg(__func__, xdr);
3026 return -EIO;
3027 }
3028
3029 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3030 {
3031 __be32 *p;
3032 int status = 0;
3033
3034 *maxname = 1024;
3035 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3036 return -EIO;
3037 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3038 p = xdr_inline_decode(xdr, 4);
3039 if (unlikely(!p))
3040 goto out_overflow;
3041 *maxname = be32_to_cpup(p);
3042 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3043 }
3044 dprintk("%s: maxname=%u\n", __func__, *maxname);
3045 return status;
3046 out_overflow:
3047 print_overflow_msg(__func__, xdr);
3048 return -EIO;
3049 }
3050
3051 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3052 {
3053 __be32 *p;
3054 int status = 0;
3055
3056 *res = 1024;
3057 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3058 return -EIO;
3059 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3060 uint64_t maxread;
3061 p = xdr_inline_decode(xdr, 8);
3062 if (unlikely(!p))
3063 goto out_overflow;
3064 xdr_decode_hyper(p, &maxread);
3065 if (maxread > 0x7FFFFFFF)
3066 maxread = 0x7FFFFFFF;
3067 *res = (uint32_t)maxread;
3068 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3069 }
3070 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3071 return status;
3072 out_overflow:
3073 print_overflow_msg(__func__, xdr);
3074 return -EIO;
3075 }
3076
3077 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3078 {
3079 __be32 *p;
3080 int status = 0;
3081
3082 *res = 1024;
3083 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3084 return -EIO;
3085 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3086 uint64_t maxwrite;
3087 p = xdr_inline_decode(xdr, 8);
3088 if (unlikely(!p))
3089 goto out_overflow;
3090 xdr_decode_hyper(p, &maxwrite);
3091 if (maxwrite > 0x7FFFFFFF)
3092 maxwrite = 0x7FFFFFFF;
3093 *res = (uint32_t)maxwrite;
3094 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3095 }
3096 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3097 return status;
3098 out_overflow:
3099 print_overflow_msg(__func__, xdr);
3100 return -EIO;
3101 }
3102
3103 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3104 {
3105 uint32_t tmp;
3106 __be32 *p;
3107 int ret = 0;
3108
3109 *mode = 0;
3110 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3111 return -EIO;
3112 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3113 p = xdr_inline_decode(xdr, 4);
3114 if (unlikely(!p))
3115 goto out_overflow;
3116 tmp = be32_to_cpup(p);
3117 *mode = tmp & ~S_IFMT;
3118 bitmap[1] &= ~FATTR4_WORD1_MODE;
3119 ret = NFS_ATTR_FATTR_MODE;
3120 }
3121 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3122 return ret;
3123 out_overflow:
3124 print_overflow_msg(__func__, xdr);
3125 return -EIO;
3126 }
3127
3128 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3129 {
3130 __be32 *p;
3131 int ret = 0;
3132
3133 *nlink = 1;
3134 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3135 return -EIO;
3136 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3137 p = xdr_inline_decode(xdr, 4);
3138 if (unlikely(!p))
3139 goto out_overflow;
3140 *nlink = be32_to_cpup(p);
3141 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3142 ret = NFS_ATTR_FATTR_NLINK;
3143 }
3144 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3145 return ret;
3146 out_overflow:
3147 print_overflow_msg(__func__, xdr);
3148 return -EIO;
3149 }
3150
3151 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3152 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3153 {
3154 uint32_t len;
3155 __be32 *p;
3156 int ret = 0;
3157
3158 *uid = -2;
3159 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3160 return -EIO;
3161 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3162 p = xdr_inline_decode(xdr, 4);
3163 if (unlikely(!p))
3164 goto out_overflow;
3165 len = be32_to_cpup(p);
3166 p = xdr_inline_decode(xdr, len);
3167 if (unlikely(!p))
3168 goto out_overflow;
3169 if (!may_sleep) {
3170 /* do nothing */
3171 } else if (len < XDR_MAX_NETOBJ) {
3172 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3173 ret = NFS_ATTR_FATTR_OWNER;
3174 else
3175 dprintk("%s: nfs_map_name_to_uid failed!\n",
3176 __func__);
3177 } else
3178 dprintk("%s: name too long (%u)!\n",
3179 __func__, len);
3180 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3181 }
3182 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3183 return ret;
3184 out_overflow:
3185 print_overflow_msg(__func__, xdr);
3186 return -EIO;
3187 }
3188
3189 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3190 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3191 {
3192 uint32_t len;
3193 __be32 *p;
3194 int ret = 0;
3195
3196 *gid = -2;
3197 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3198 return -EIO;
3199 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3200 p = xdr_inline_decode(xdr, 4);
3201 if (unlikely(!p))
3202 goto out_overflow;
3203 len = be32_to_cpup(p);
3204 p = xdr_inline_decode(xdr, len);
3205 if (unlikely(!p))
3206 goto out_overflow;
3207 if (!may_sleep) {
3208 /* do nothing */
3209 } else if (len < XDR_MAX_NETOBJ) {
3210 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3211 ret = NFS_ATTR_FATTR_GROUP;
3212 else
3213 dprintk("%s: nfs_map_group_to_gid failed!\n",
3214 __func__);
3215 } else
3216 dprintk("%s: name too long (%u)!\n",
3217 __func__, len);
3218 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3219 }
3220 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3221 return ret;
3222 out_overflow:
3223 print_overflow_msg(__func__, xdr);
3224 return -EIO;
3225 }
3226
3227 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3228 {
3229 uint32_t major = 0, minor = 0;
3230 __be32 *p;
3231 int ret = 0;
3232
3233 *rdev = MKDEV(0,0);
3234 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3235 return -EIO;
3236 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3237 dev_t tmp;
3238
3239 p = xdr_inline_decode(xdr, 8);
3240 if (unlikely(!p))
3241 goto out_overflow;
3242 major = be32_to_cpup(p++);
3243 minor = be32_to_cpup(p);
3244 tmp = MKDEV(major, minor);
3245 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3246 *rdev = tmp;
3247 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3248 ret = NFS_ATTR_FATTR_RDEV;
3249 }
3250 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3251 return ret;
3252 out_overflow:
3253 print_overflow_msg(__func__, xdr);
3254 return -EIO;
3255 }
3256
3257 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3258 {
3259 __be32 *p;
3260 int status = 0;
3261
3262 *res = 0;
3263 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3264 return -EIO;
3265 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3266 p = xdr_inline_decode(xdr, 8);
3267 if (unlikely(!p))
3268 goto out_overflow;
3269 xdr_decode_hyper(p, res);
3270 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3271 }
3272 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3273 return status;
3274 out_overflow:
3275 print_overflow_msg(__func__, xdr);
3276 return -EIO;
3277 }
3278
3279 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3280 {
3281 __be32 *p;
3282 int status = 0;
3283
3284 *res = 0;
3285 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3286 return -EIO;
3287 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3288 p = xdr_inline_decode(xdr, 8);
3289 if (unlikely(!p))
3290 goto out_overflow;
3291 xdr_decode_hyper(p, res);
3292 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3293 }
3294 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3295 return status;
3296 out_overflow:
3297 print_overflow_msg(__func__, xdr);
3298 return -EIO;
3299 }
3300
3301 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3302 {
3303 __be32 *p;
3304 int status = 0;
3305
3306 *res = 0;
3307 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3308 return -EIO;
3309 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3310 p = xdr_inline_decode(xdr, 8);
3311 if (unlikely(!p))
3312 goto out_overflow;
3313 xdr_decode_hyper(p, res);
3314 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3315 }
3316 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3317 return status;
3318 out_overflow:
3319 print_overflow_msg(__func__, xdr);
3320 return -EIO;
3321 }
3322
3323 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3324 {
3325 __be32 *p;
3326 int ret = 0;
3327
3328 *used = 0;
3329 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3330 return -EIO;
3331 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3332 p = xdr_inline_decode(xdr, 8);
3333 if (unlikely(!p))
3334 goto out_overflow;
3335 xdr_decode_hyper(p, used);
3336 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3337 ret = NFS_ATTR_FATTR_SPACE_USED;
3338 }
3339 dprintk("%s: space used=%Lu\n", __func__,
3340 (unsigned long long)*used);
3341 return ret;
3342 out_overflow:
3343 print_overflow_msg(__func__, xdr);
3344 return -EIO;
3345 }
3346
3347 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3348 {
3349 __be32 *p;
3350 uint64_t sec;
3351 uint32_t nsec;
3352
3353 p = xdr_inline_decode(xdr, 12);
3354 if (unlikely(!p))
3355 goto out_overflow;
3356 p = xdr_decode_hyper(p, &sec);
3357 nsec = be32_to_cpup(p);
3358 time->tv_sec = (time_t)sec;
3359 time->tv_nsec = (long)nsec;
3360 return 0;
3361 out_overflow:
3362 print_overflow_msg(__func__, xdr);
3363 return -EIO;
3364 }
3365
3366 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3367 {
3368 int status = 0;
3369
3370 time->tv_sec = 0;
3371 time->tv_nsec = 0;
3372 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3373 return -EIO;
3374 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3375 status = decode_attr_time(xdr, time);
3376 if (status == 0)
3377 status = NFS_ATTR_FATTR_ATIME;
3378 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3379 }
3380 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3381 return status;
3382 }
3383
3384 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3385 {
3386 int status = 0;
3387
3388 time->tv_sec = 0;
3389 time->tv_nsec = 0;
3390 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3391 return -EIO;
3392 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3393 status = decode_attr_time(xdr, time);
3394 if (status == 0)
3395 status = NFS_ATTR_FATTR_CTIME;
3396 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3397 }
3398 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3399 return status;
3400 }
3401
3402 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3403 {
3404 int status = 0;
3405
3406 time->tv_sec = 0;
3407 time->tv_nsec = 0;
3408 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3409 return -EIO;
3410 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3411 status = decode_attr_time(xdr, time);
3412 if (status == 0)
3413 status = NFS_ATTR_FATTR_MTIME;
3414 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3415 }
3416 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3417 return status;
3418 }
3419
3420 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3421 {
3422 unsigned int attrwords = XDR_QUADLEN(attrlen);
3423 unsigned int nwords = xdr->p - savep;
3424
3425 if (unlikely(attrwords != nwords)) {
3426 dprintk("%s: server returned incorrect attribute length: "
3427 "%u %c %u\n",
3428 __func__,
3429 attrwords << 2,
3430 (attrwords < nwords) ? '<' : '>',
3431 nwords << 2);
3432 return -EIO;
3433 }
3434 return 0;
3435 }
3436
3437 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3438 {
3439 __be32 *p;
3440
3441 p = xdr_inline_decode(xdr, 20);
3442 if (unlikely(!p))
3443 goto out_overflow;
3444 cinfo->atomic = be32_to_cpup(p++);
3445 p = xdr_decode_hyper(p, &cinfo->before);
3446 xdr_decode_hyper(p, &cinfo->after);
3447 return 0;
3448 out_overflow:
3449 print_overflow_msg(__func__, xdr);
3450 return -EIO;
3451 }
3452
3453 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3454 {
3455 __be32 *p;
3456 uint32_t supp, acc;
3457 int status;
3458
3459 status = decode_op_hdr(xdr, OP_ACCESS);
3460 if (status)
3461 return status;
3462 p = xdr_inline_decode(xdr, 8);
3463 if (unlikely(!p))
3464 goto out_overflow;
3465 supp = be32_to_cpup(p++);
3466 acc = be32_to_cpup(p);
3467 access->supported = supp;
3468 access->access = acc;
3469 return 0;
3470 out_overflow:
3471 print_overflow_msg(__func__, xdr);
3472 return -EIO;
3473 }
3474
3475 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3476 {
3477 __be32 *p;
3478
3479 p = xdr_inline_decode(xdr, len);
3480 if (likely(p)) {
3481 memcpy(buf, p, len);
3482 return 0;
3483 }
3484 print_overflow_msg(__func__, xdr);
3485 return -EIO;
3486 }
3487
3488 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3489 {
3490 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3491 }
3492
3493 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3494 {
3495 int status;
3496
3497 status = decode_op_hdr(xdr, OP_CLOSE);
3498 if (status != -EIO)
3499 nfs_increment_open_seqid(status, res->seqid);
3500 if (!status)
3501 status = decode_stateid(xdr, &res->stateid);
3502 return status;
3503 }
3504
3505 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3506 {
3507 return decode_opaque_fixed(xdr, verifier, 8);
3508 }
3509
3510 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3511 {
3512 int status;
3513
3514 status = decode_op_hdr(xdr, OP_COMMIT);
3515 if (!status)
3516 status = decode_verifier(xdr, res->verf->verifier);
3517 return status;
3518 }
3519
3520 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3521 {
3522 __be32 *p;
3523 uint32_t bmlen;
3524 int status;
3525
3526 status = decode_op_hdr(xdr, OP_CREATE);
3527 if (status)
3528 return status;
3529 if ((status = decode_change_info(xdr, cinfo)))
3530 return status;
3531 p = xdr_inline_decode(xdr, 4);
3532 if (unlikely(!p))
3533 goto out_overflow;
3534 bmlen = be32_to_cpup(p);
3535 p = xdr_inline_decode(xdr, bmlen << 2);
3536 if (likely(p))
3537 return 0;
3538 out_overflow:
3539 print_overflow_msg(__func__, xdr);
3540 return -EIO;
3541 }
3542
3543 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3544 {
3545 __be32 *savep;
3546 uint32_t attrlen, bitmap[2] = {0};
3547 int status;
3548
3549 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3550 goto xdr_error;
3551 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3552 goto xdr_error;
3553 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3554 goto xdr_error;
3555 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3556 goto xdr_error;
3557 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3558 goto xdr_error;
3559 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3560 goto xdr_error;
3561 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3562 goto xdr_error;
3563 status = verify_attr_len(xdr, savep, attrlen);
3564 xdr_error:
3565 dprintk("%s: xdr returned %d!\n", __func__, -status);
3566 return status;
3567 }
3568
3569 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3570 {
3571 __be32 *savep;
3572 uint32_t attrlen, bitmap[2] = {0};
3573 int status;
3574
3575 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3576 goto xdr_error;
3577 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3578 goto xdr_error;
3579 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3580 goto xdr_error;
3581
3582 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3583 goto xdr_error;
3584 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3585 goto xdr_error;
3586 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3587 goto xdr_error;
3588 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3589 goto xdr_error;
3590 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3591 goto xdr_error;
3592 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3593 goto xdr_error;
3594
3595 status = verify_attr_len(xdr, savep, attrlen);
3596 xdr_error:
3597 dprintk("%s: xdr returned %d!\n", __func__, -status);
3598 return status;
3599 }
3600
3601 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3602 {
3603 __be32 *savep;
3604 uint32_t attrlen, bitmap[2] = {0};
3605 int status;
3606
3607 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3608 goto xdr_error;
3609 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3610 goto xdr_error;
3611 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3612 goto xdr_error;
3613
3614 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3615 goto xdr_error;
3616 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3617 goto xdr_error;
3618
3619 status = verify_attr_len(xdr, savep, attrlen);
3620 xdr_error:
3621 dprintk("%s: xdr returned %d!\n", __func__, -status);
3622 return status;
3623 }
3624
3625 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3626 const struct nfs_server *server, int may_sleep)
3627 {
3628 __be32 *savep;
3629 uint32_t attrlen,
3630 bitmap[2] = {0},
3631 type;
3632 int status;
3633 umode_t fmode = 0;
3634 uint64_t fileid;
3635
3636 status = decode_op_hdr(xdr, OP_GETATTR);
3637 if (status < 0)
3638 goto xdr_error;
3639
3640 status = decode_attr_bitmap(xdr, bitmap);
3641 if (status < 0)
3642 goto xdr_error;
3643
3644 status = decode_attr_length(xdr, &attrlen, &savep);
3645 if (status < 0)
3646 goto xdr_error;
3647
3648
3649 status = decode_attr_type(xdr, bitmap, &type);
3650 if (status < 0)
3651 goto xdr_error;
3652 fattr->mode = 0;
3653 if (status != 0) {
3654 fattr->mode |= nfs_type2fmt[type];
3655 fattr->valid |= status;
3656 }
3657
3658 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3659 if (status < 0)
3660 goto xdr_error;
3661 fattr->valid |= status;
3662
3663 status = decode_attr_size(xdr, bitmap, &fattr->size);
3664 if (status < 0)
3665 goto xdr_error;
3666 fattr->valid |= status;
3667
3668 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3669 if (status < 0)
3670 goto xdr_error;
3671 fattr->valid |= status;
3672
3673 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3674 if (status < 0)
3675 goto xdr_error;
3676 fattr->valid |= status;
3677
3678 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3679 struct nfs4_fs_locations,
3680 fattr));
3681 if (status < 0)
3682 goto xdr_error;
3683 fattr->valid |= status;
3684
3685 status = decode_attr_mode(xdr, bitmap, &fmode);
3686 if (status < 0)
3687 goto xdr_error;
3688 if (status != 0) {
3689 fattr->mode |= fmode;
3690 fattr->valid |= status;
3691 }
3692
3693 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3694 if (status < 0)
3695 goto xdr_error;
3696 fattr->valid |= status;
3697
3698 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3699 &fattr->uid, may_sleep);
3700 if (status < 0)
3701 goto xdr_error;
3702 fattr->valid |= status;
3703
3704 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3705 &fattr->gid, may_sleep);
3706 if (status < 0)
3707 goto xdr_error;
3708 fattr->valid |= status;
3709
3710 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3711 if (status < 0)
3712 goto xdr_error;
3713 fattr->valid |= status;
3714
3715 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3716 if (status < 0)
3717 goto xdr_error;
3718 fattr->valid |= status;
3719
3720 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3721 if (status < 0)
3722 goto xdr_error;
3723 fattr->valid |= status;
3724
3725 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3726 if (status < 0)
3727 goto xdr_error;
3728 fattr->valid |= status;
3729
3730 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3731 if (status < 0)
3732 goto xdr_error;
3733 fattr->valid |= status;
3734
3735 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3736 if (status < 0)
3737 goto xdr_error;
3738 if (status != 0 && !(fattr->valid & status)) {
3739 fattr->fileid = fileid;
3740 fattr->valid |= status;
3741 }
3742
3743 status = verify_attr_len(xdr, savep, attrlen);
3744 xdr_error:
3745 dprintk("%s: xdr returned %d\n", __func__, -status);
3746 return status;
3747 }
3748
3749
3750 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3751 {
3752 __be32 *savep;
3753 uint32_t attrlen, bitmap[2];
3754 int status;
3755
3756 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3757 goto xdr_error;
3758 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3759 goto xdr_error;
3760 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3761 goto xdr_error;
3762
3763 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3764
3765 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3766 goto xdr_error;
3767 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3768 goto xdr_error;
3769 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3770 goto xdr_error;
3771 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3772 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3773 goto xdr_error;
3774 fsinfo->wtpref = fsinfo->wtmax;
3775
3776 status = verify_attr_len(xdr, savep, attrlen);
3777 xdr_error:
3778 dprintk("%s: xdr returned %d!\n", __func__, -status);
3779 return status;
3780 }
3781
3782 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3783 {
3784 __be32 *p;
3785 uint32_t len;
3786 int status;
3787
3788 /* Zero handle first to allow comparisons */
3789 memset(fh, 0, sizeof(*fh));
3790
3791 status = decode_op_hdr(xdr, OP_GETFH);
3792 if (status)
3793 return status;
3794
3795 p = xdr_inline_decode(xdr, 4);
3796 if (unlikely(!p))
3797 goto out_overflow;
3798 len = be32_to_cpup(p);
3799 if (len > NFS4_FHSIZE)
3800 return -EIO;
3801 fh->size = len;
3802 p = xdr_inline_decode(xdr, len);
3803 if (unlikely(!p))
3804 goto out_overflow;
3805 memcpy(fh->data, p, len);
3806 return 0;
3807 out_overflow:
3808 print_overflow_msg(__func__, xdr);
3809 return -EIO;
3810 }
3811
3812 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3813 {
3814 int status;
3815
3816 status = decode_op_hdr(xdr, OP_LINK);
3817 if (status)
3818 return status;
3819 return decode_change_info(xdr, cinfo);
3820 }
3821
3822 /*
3823 * We create the owner, so we know a proper owner.id length is 4.
3824 */
3825 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3826 {
3827 uint64_t offset, length, clientid;
3828 __be32 *p;
3829 uint32_t namelen, type;
3830
3831 p = xdr_inline_decode(xdr, 32);
3832 if (unlikely(!p))
3833 goto out_overflow;
3834 p = xdr_decode_hyper(p, &offset);
3835 p = xdr_decode_hyper(p, &length);
3836 type = be32_to_cpup(p++);
3837 if (fl != NULL) {
3838 fl->fl_start = (loff_t)offset;
3839 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3840 if (length == ~(uint64_t)0)
3841 fl->fl_end = OFFSET_MAX;
3842 fl->fl_type = F_WRLCK;
3843 if (type & 1)
3844 fl->fl_type = F_RDLCK;
3845 fl->fl_pid = 0;
3846 }
3847 p = xdr_decode_hyper(p, &clientid);
3848 namelen = be32_to_cpup(p);
3849 p = xdr_inline_decode(xdr, namelen);
3850 if (likely(p))
3851 return -NFS4ERR_DENIED;
3852 out_overflow:
3853 print_overflow_msg(__func__, xdr);
3854 return -EIO;
3855 }
3856
3857 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3858 {
3859 int status;
3860
3861 status = decode_op_hdr(xdr, OP_LOCK);
3862 if (status == -EIO)
3863 goto out;
3864 if (status == 0) {
3865 status = decode_stateid(xdr, &res->stateid);
3866 if (unlikely(status))
3867 goto out;
3868 } else if (status == -NFS4ERR_DENIED)
3869 status = decode_lock_denied(xdr, NULL);
3870 if (res->open_seqid != NULL)
3871 nfs_increment_open_seqid(status, res->open_seqid);
3872 nfs_increment_lock_seqid(status, res->lock_seqid);
3873 out:
3874 return status;
3875 }
3876
3877 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3878 {
3879 int status;
3880 status = decode_op_hdr(xdr, OP_LOCKT);
3881 if (status == -NFS4ERR_DENIED)
3882 return decode_lock_denied(xdr, res->denied);
3883 return status;
3884 }
3885
3886 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3887 {
3888 int status;
3889
3890 status = decode_op_hdr(xdr, OP_LOCKU);
3891 if (status != -EIO)
3892 nfs_increment_lock_seqid(status, res->seqid);
3893 if (status == 0)
3894 status = decode_stateid(xdr, &res->stateid);
3895 return status;
3896 }
3897
3898 static int decode_lookup(struct xdr_stream *xdr)
3899 {
3900 return decode_op_hdr(xdr, OP_LOOKUP);
3901 }
3902
3903 /* This is too sick! */
3904 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3905 {
3906 __be32 *p;
3907 uint32_t limit_type, nblocks, blocksize;
3908
3909 p = xdr_inline_decode(xdr, 12);
3910 if (unlikely(!p))
3911 goto out_overflow;
3912 limit_type = be32_to_cpup(p++);
3913 switch (limit_type) {
3914 case 1:
3915 xdr_decode_hyper(p, maxsize);
3916 break;
3917 case 2:
3918 nblocks = be32_to_cpup(p++);
3919 blocksize = be32_to_cpup(p);
3920 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3921 }
3922 return 0;
3923 out_overflow:
3924 print_overflow_msg(__func__, xdr);
3925 return -EIO;
3926 }
3927
3928 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3929 {
3930 __be32 *p;
3931 uint32_t delegation_type;
3932 int status;
3933
3934 p = xdr_inline_decode(xdr, 4);
3935 if (unlikely(!p))
3936 goto out_overflow;
3937 delegation_type = be32_to_cpup(p);
3938 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3939 res->delegation_type = 0;
3940 return 0;
3941 }
3942 status = decode_stateid(xdr, &res->delegation);
3943 if (unlikely(status))
3944 return status;
3945 p = xdr_inline_decode(xdr, 4);
3946 if (unlikely(!p))
3947 goto out_overflow;
3948 res->do_recall = be32_to_cpup(p);
3949
3950 switch (delegation_type) {
3951 case NFS4_OPEN_DELEGATE_READ:
3952 res->delegation_type = FMODE_READ;
3953 break;
3954 case NFS4_OPEN_DELEGATE_WRITE:
3955 res->delegation_type = FMODE_WRITE|FMODE_READ;
3956 if (decode_space_limit(xdr, &res->maxsize) < 0)
3957 return -EIO;
3958 }
3959 return decode_ace(xdr, NULL, res->server->nfs_client);
3960 out_overflow:
3961 print_overflow_msg(__func__, xdr);
3962 return -EIO;
3963 }
3964
3965 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3966 {
3967 __be32 *p;
3968 uint32_t savewords, bmlen, i;
3969 int status;
3970
3971 status = decode_op_hdr(xdr, OP_OPEN);
3972 if (status != -EIO)
3973 nfs_increment_open_seqid(status, res->seqid);
3974 if (!status)
3975 status = decode_stateid(xdr, &res->stateid);
3976 if (unlikely(status))
3977 return status;
3978
3979 decode_change_info(xdr, &res->cinfo);
3980
3981 p = xdr_inline_decode(xdr, 8);
3982 if (unlikely(!p))
3983 goto out_overflow;
3984 res->rflags = be32_to_cpup(p++);
3985 bmlen = be32_to_cpup(p);
3986 if (bmlen > 10)
3987 goto xdr_error;
3988
3989 p = xdr_inline_decode(xdr, bmlen << 2);
3990 if (unlikely(!p))
3991 goto out_overflow;
3992 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3993 for (i = 0; i < savewords; ++i)
3994 res->attrset[i] = be32_to_cpup(p++);
3995 for (; i < NFS4_BITMAP_SIZE; i++)
3996 res->attrset[i] = 0;
3997
3998 return decode_delegation(xdr, res);
3999 xdr_error:
4000 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4001 return -EIO;
4002 out_overflow:
4003 print_overflow_msg(__func__, xdr);
4004 return -EIO;
4005 }
4006
4007 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4008 {
4009 int status;
4010
4011 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4012 if (status != -EIO)
4013 nfs_increment_open_seqid(status, res->seqid);
4014 if (!status)
4015 status = decode_stateid(xdr, &res->stateid);
4016 return status;
4017 }
4018
4019 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4020 {
4021 int status;
4022
4023 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4024 if (status != -EIO)
4025 nfs_increment_open_seqid(status, res->seqid);
4026 if (!status)
4027 status = decode_stateid(xdr, &res->stateid);
4028 return status;
4029 }
4030
4031 static int decode_putfh(struct xdr_stream *xdr)
4032 {
4033 return decode_op_hdr(xdr, OP_PUTFH);
4034 }
4035
4036 static int decode_putrootfh(struct xdr_stream *xdr)
4037 {
4038 return decode_op_hdr(xdr, OP_PUTROOTFH);
4039 }
4040
4041 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4042 {
4043 struct kvec *iov = req->rq_rcv_buf.head;
4044 __be32 *p;
4045 uint32_t count, eof, recvd, hdrlen;
4046 int status;
4047
4048 status = decode_op_hdr(xdr, OP_READ);
4049 if (status)
4050 return status;
4051 p = xdr_inline_decode(xdr, 8);
4052 if (unlikely(!p))
4053 goto out_overflow;
4054 eof = be32_to_cpup(p++);
4055 count = be32_to_cpup(p);
4056 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4057 recvd = req->rq_rcv_buf.len - hdrlen;
4058 if (count > recvd) {
4059 dprintk("NFS: server cheating in read reply: "
4060 "count %u > recvd %u\n", count, recvd);
4061 count = recvd;
4062 eof = 0;
4063 }
4064 xdr_read_pages(xdr, count);
4065 res->eof = eof;
4066 res->count = count;
4067 return 0;
4068 out_overflow:
4069 print_overflow_msg(__func__, xdr);
4070 return -EIO;
4071 }
4072
4073 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4074 {
4075 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4076 struct page *page = *rcvbuf->pages;
4077 struct kvec *iov = rcvbuf->head;
4078 size_t hdrlen;
4079 u32 recvd, pglen = rcvbuf->page_len;
4080 __be32 *end, *entry, *p, *kaddr;
4081 unsigned int nr = 0;
4082 int status;
4083
4084 status = decode_op_hdr(xdr, OP_READDIR);
4085 if (!status)
4086 status = decode_verifier(xdr, readdir->verifier.data);
4087 if (unlikely(status))
4088 return status;
4089 dprintk("%s: verifier = %08x:%08x\n",
4090 __func__,
4091 ((u32 *)readdir->verifier.data)[0],
4092 ((u32 *)readdir->verifier.data)[1]);
4093
4094
4095 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4096 recvd = rcvbuf->len - hdrlen;
4097 if (pglen > recvd)
4098 pglen = recvd;
4099 xdr_read_pages(xdr, pglen);
4100
4101 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4102 kaddr = p = kmap_atomic(page, KM_USER0);
4103 end = p + ((pglen + readdir->pgbase) >> 2);
4104 entry = p;
4105
4106 /* Make sure the packet actually has a value_follows and EOF entry */
4107 if ((entry + 1) > end)
4108 goto short_pkt;
4109
4110 for (; *p++; nr++) {
4111 u32 len, attrlen, xlen;
4112 if (end - p < 3)
4113 goto short_pkt;
4114 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4115 p += 2; /* cookie */
4116 len = ntohl(*p++); /* filename length */
4117 if (len > NFS4_MAXNAMLEN) {
4118 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4119 len);
4120 goto err_unmap;
4121 }
4122 xlen = XDR_QUADLEN(len);
4123 if (end - p < xlen + 1)
4124 goto short_pkt;
4125 dprintk("filename = %*s\n", len, (char *)p);
4126 p += xlen;
4127 len = ntohl(*p++); /* bitmap length */
4128 if (end - p < len + 1)
4129 goto short_pkt;
4130 p += len;
4131 attrlen = XDR_QUADLEN(ntohl(*p++));
4132 if (end - p < attrlen + 2)
4133 goto short_pkt;
4134 p += attrlen; /* attributes */
4135 entry = p;
4136 }
4137 /*
4138 * Apparently some server sends responses that are a valid size, but
4139 * contain no entries, and have value_follows==0 and EOF==0. For
4140 * those, just set the EOF marker.
4141 */
4142 if (!nr && entry[1] == 0) {
4143 dprintk("NFS: readdir reply truncated!\n");
4144 entry[1] = 1;
4145 }
4146 out:
4147 kunmap_atomic(kaddr, KM_USER0);
4148 return 0;
4149 short_pkt:
4150 /*
4151 * When we get a short packet there are 2 possibilities. We can
4152 * return an error, or fix up the response to look like a valid
4153 * response and return what we have so far. If there are no
4154 * entries and the packet was short, then return -EIO. If there
4155 * are valid entries in the response, return them and pretend that
4156 * the call was successful, but incomplete. The caller can retry the
4157 * readdir starting at the last cookie.
4158 */
4159 dprintk("%s: short packet at entry %d\n", __func__, nr);
4160 entry[0] = entry[1] = 0;
4161 if (nr)
4162 goto out;
4163 err_unmap:
4164 kunmap_atomic(kaddr, KM_USER0);
4165 return -errno_NFSERR_IO;
4166 }
4167
4168 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4169 {
4170 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4171 struct kvec *iov = rcvbuf->head;
4172 size_t hdrlen;
4173 u32 len, recvd;
4174 __be32 *p;
4175 char *kaddr;
4176 int status;
4177
4178 status = decode_op_hdr(xdr, OP_READLINK);
4179 if (status)
4180 return status;
4181
4182 /* Convert length of symlink */
4183 p = xdr_inline_decode(xdr, 4);
4184 if (unlikely(!p))
4185 goto out_overflow;
4186 len = be32_to_cpup(p);
4187 if (len >= rcvbuf->page_len || len <= 0) {
4188 dprintk("nfs: server returned giant symlink!\n");
4189 return -ENAMETOOLONG;
4190 }
4191 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4192 recvd = req->rq_rcv_buf.len - hdrlen;
4193 if (recvd < len) {
4194 dprintk("NFS: server cheating in readlink reply: "
4195 "count %u > recvd %u\n", len, recvd);
4196 return -EIO;
4197 }
4198 xdr_read_pages(xdr, len);
4199 /*
4200 * The XDR encode routine has set things up so that
4201 * the link text will be copied directly into the
4202 * buffer. We just have to do overflow-checking,
4203 * and and null-terminate the text (the VFS expects
4204 * null-termination).
4205 */
4206 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4207 kaddr[len+rcvbuf->page_base] = '\0';
4208 kunmap_atomic(kaddr, KM_USER0);
4209 return 0;
4210 out_overflow:
4211 print_overflow_msg(__func__, xdr);
4212 return -EIO;
4213 }
4214
4215 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4216 {
4217 int status;
4218
4219 status = decode_op_hdr(xdr, OP_REMOVE);
4220 if (status)
4221 goto out;
4222 status = decode_change_info(xdr, cinfo);
4223 out:
4224 return status;
4225 }
4226
4227 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4228 struct nfs4_change_info *new_cinfo)
4229 {
4230 int status;
4231
4232 status = decode_op_hdr(xdr, OP_RENAME);
4233 if (status)
4234 goto out;
4235 if ((status = decode_change_info(xdr, old_cinfo)))
4236 goto out;
4237 status = decode_change_info(xdr, new_cinfo);
4238 out:
4239 return status;
4240 }
4241
4242 static int decode_renew(struct xdr_stream *xdr)
4243 {
4244 return decode_op_hdr(xdr, OP_RENEW);
4245 }
4246
4247 static int
4248 decode_restorefh(struct xdr_stream *xdr)
4249 {
4250 return decode_op_hdr(xdr, OP_RESTOREFH);
4251 }
4252
4253 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4254 size_t *acl_len)
4255 {
4256 __be32 *savep;
4257 uint32_t attrlen,
4258 bitmap[2] = {0};
4259 struct kvec *iov = req->rq_rcv_buf.head;
4260 int status;
4261
4262 *acl_len = 0;
4263 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4264 goto out;
4265 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4266 goto out;
4267 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4268 goto out;
4269
4270 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4271 return -EIO;
4272 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4273 size_t hdrlen;
4274 u32 recvd;
4275
4276 /* We ignore &savep and don't do consistency checks on
4277 * the attr length. Let userspace figure it out.... */
4278 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4279 recvd = req->rq_rcv_buf.len - hdrlen;
4280 if (attrlen > recvd) {
4281 dprintk("NFS: server cheating in getattr"
4282 " acl reply: attrlen %u > recvd %u\n",
4283 attrlen, recvd);
4284 return -EINVAL;
4285 }
4286 xdr_read_pages(xdr, attrlen);
4287 *acl_len = attrlen;
4288 } else
4289 status = -EOPNOTSUPP;
4290
4291 out:
4292 return status;
4293 }
4294
4295 static int
4296 decode_savefh(struct xdr_stream *xdr)
4297 {
4298 return decode_op_hdr(xdr, OP_SAVEFH);
4299 }
4300
4301 static int decode_setattr(struct xdr_stream *xdr)
4302 {
4303 __be32 *p;
4304 uint32_t bmlen;
4305 int status;
4306
4307 status = decode_op_hdr(xdr, OP_SETATTR);
4308 if (status)
4309 return status;
4310 p = xdr_inline_decode(xdr, 4);
4311 if (unlikely(!p))
4312 goto out_overflow;
4313 bmlen = be32_to_cpup(p);
4314 p = xdr_inline_decode(xdr, bmlen << 2);
4315 if (likely(p))
4316 return 0;
4317 out_overflow:
4318 print_overflow_msg(__func__, xdr);
4319 return -EIO;
4320 }
4321
4322 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4323 {
4324 __be32 *p;
4325 uint32_t opnum;
4326 int32_t nfserr;
4327
4328 p = xdr_inline_decode(xdr, 8);
4329 if (unlikely(!p))
4330 goto out_overflow;
4331 opnum = be32_to_cpup(p++);
4332 if (opnum != OP_SETCLIENTID) {
4333 dprintk("nfs: decode_setclientid: Server returned operation"
4334 " %d\n", opnum);
4335 return -EIO;
4336 }
4337 nfserr = be32_to_cpup(p);
4338 if (nfserr == NFS_OK) {
4339 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4340 if (unlikely(!p))
4341 goto out_overflow;
4342 p = xdr_decode_hyper(p, &clp->cl_clientid);
4343 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4344 } else if (nfserr == NFSERR_CLID_INUSE) {
4345 uint32_t len;
4346
4347 /* skip netid string */
4348 p = xdr_inline_decode(xdr, 4);
4349 if (unlikely(!p))
4350 goto out_overflow;
4351 len = be32_to_cpup(p);
4352 p = xdr_inline_decode(xdr, len);
4353 if (unlikely(!p))
4354 goto out_overflow;
4355
4356 /* skip uaddr string */
4357 p = xdr_inline_decode(xdr, 4);
4358 if (unlikely(!p))
4359 goto out_overflow;
4360 len = be32_to_cpup(p);
4361 p = xdr_inline_decode(xdr, len);
4362 if (unlikely(!p))
4363 goto out_overflow;
4364 return -NFSERR_CLID_INUSE;
4365 } else
4366 return nfs4_stat_to_errno(nfserr);
4367
4368 return 0;
4369 out_overflow:
4370 print_overflow_msg(__func__, xdr);
4371 return -EIO;
4372 }
4373
4374 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4375 {
4376 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4377 }
4378
4379 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4380 {
4381 __be32 *p;
4382 int status;
4383
4384 status = decode_op_hdr(xdr, OP_WRITE);
4385 if (status)
4386 return status;
4387
4388 p = xdr_inline_decode(xdr, 16);
4389 if (unlikely(!p))
4390 goto out_overflow;
4391 res->count = be32_to_cpup(p++);
4392 res->verf->committed = be32_to_cpup(p++);
4393 memcpy(res->verf->verifier, p, 8);
4394 return 0;
4395 out_overflow:
4396 print_overflow_msg(__func__, xdr);
4397 return -EIO;
4398 }
4399
4400 static int decode_delegreturn(struct xdr_stream *xdr)
4401 {
4402 return decode_op_hdr(xdr, OP_DELEGRETURN);
4403 }
4404
4405 #if defined(CONFIG_NFS_V4_1)
4406 static int decode_exchange_id(struct xdr_stream *xdr,
4407 struct nfs41_exchange_id_res *res)
4408 {
4409 __be32 *p;
4410 uint32_t dummy;
4411 char *dummy_str;
4412 int status;
4413 struct nfs_client *clp = res->client;
4414
4415 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4416 if (status)
4417 return status;
4418
4419 p = xdr_inline_decode(xdr, 8);
4420 if (unlikely(!p))
4421 goto out_overflow;
4422 xdr_decode_hyper(p, &clp->cl_ex_clid);
4423 p = xdr_inline_decode(xdr, 12);
4424 if (unlikely(!p))
4425 goto out_overflow;
4426 clp->cl_seqid = be32_to_cpup(p++);
4427 clp->cl_exchange_flags = be32_to_cpup(p++);
4428
4429 /* We ask for SP4_NONE */
4430 dummy = be32_to_cpup(p);
4431 if (dummy != SP4_NONE)
4432 return -EIO;
4433
4434 /* Throw away minor_id */
4435 p = xdr_inline_decode(xdr, 8);
4436 if (unlikely(!p))
4437 goto out_overflow;
4438
4439 /* Throw away Major id */
4440 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4441 if (unlikely(status))
4442 return status;
4443
4444 /* Throw away server_scope */
4445 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4446 if (unlikely(status))
4447 return status;
4448
4449 /* Throw away Implementation id array */
4450 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4451 if (unlikely(status))
4452 return status;
4453
4454 return 0;
4455 out_overflow:
4456 print_overflow_msg(__func__, xdr);
4457 return -EIO;
4458 }
4459
4460 static int decode_chan_attrs(struct xdr_stream *xdr,
4461 struct nfs4_channel_attrs *attrs)
4462 {
4463 __be32 *p;
4464 u32 nr_attrs;
4465
4466 p = xdr_inline_decode(xdr, 28);
4467 if (unlikely(!p))
4468 goto out_overflow;
4469 attrs->headerpadsz = be32_to_cpup(p++);
4470 attrs->max_rqst_sz = be32_to_cpup(p++);
4471 attrs->max_resp_sz = be32_to_cpup(p++);
4472 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4473 attrs->max_ops = be32_to_cpup(p++);
4474 attrs->max_reqs = be32_to_cpup(p++);
4475 nr_attrs = be32_to_cpup(p);
4476 if (unlikely(nr_attrs > 1)) {
4477 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4478 __func__, nr_attrs);
4479 return -EINVAL;
4480 }
4481 if (nr_attrs == 1) {
4482 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4483 if (unlikely(!p))
4484 goto out_overflow;
4485 }
4486 return 0;
4487 out_overflow:
4488 print_overflow_msg(__func__, xdr);
4489 return -EIO;
4490 }
4491
4492 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4493 {
4494 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4495 }
4496
4497 static int decode_create_session(struct xdr_stream *xdr,
4498 struct nfs41_create_session_res *res)
4499 {
4500 __be32 *p;
4501 int status;
4502 struct nfs_client *clp = res->client;
4503 struct nfs4_session *session = clp->cl_session;
4504
4505 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4506 if (!status)
4507 status = decode_sessionid(xdr, &session->sess_id);
4508 if (unlikely(status))
4509 return status;
4510
4511 /* seqid, flags */
4512 p = xdr_inline_decode(xdr, 8);
4513 if (unlikely(!p))
4514 goto out_overflow;
4515 clp->cl_seqid = be32_to_cpup(p++);
4516 session->flags = be32_to_cpup(p);
4517
4518 /* Channel attributes */
4519 status = decode_chan_attrs(xdr, &session->fc_attrs);
4520 if (!status)
4521 status = decode_chan_attrs(xdr, &session->bc_attrs);
4522 return status;
4523 out_overflow:
4524 print_overflow_msg(__func__, xdr);
4525 return -EIO;
4526 }
4527
4528 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4529 {
4530 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4531 }
4532 #endif /* CONFIG_NFS_V4_1 */
4533
4534 static int decode_sequence(struct xdr_stream *xdr,
4535 struct nfs4_sequence_res *res,
4536 struct rpc_rqst *rqstp)
4537 {
4538 #if defined(CONFIG_NFS_V4_1)
4539 struct nfs4_slot *slot;
4540 struct nfs4_sessionid id;
4541 u32 dummy;
4542 int status;
4543 __be32 *p;
4544
4545 if (!res->sr_session)
4546 return 0;
4547
4548 status = decode_op_hdr(xdr, OP_SEQUENCE);
4549 if (!status)
4550 status = decode_sessionid(xdr, &id);
4551 if (unlikely(status))
4552 goto out_err;
4553
4554 /*
4555 * If the server returns different values for sessionID, slotID or
4556 * sequence number, the server is looney tunes.
4557 */
4558 status = -ESERVERFAULT;
4559
4560 if (memcmp(id.data, res->sr_session->sess_id.data,
4561 NFS4_MAX_SESSIONID_LEN)) {
4562 dprintk("%s Invalid session id\n", __func__);
4563 goto out_err;
4564 }
4565
4566 p = xdr_inline_decode(xdr, 20);
4567 if (unlikely(!p))
4568 goto out_overflow;
4569
4570 /* seqid */
4571 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4572 dummy = be32_to_cpup(p++);
4573 if (dummy != slot->seq_nr) {
4574 dprintk("%s Invalid sequence number\n", __func__);
4575 goto out_err;
4576 }
4577 /* slot id */
4578 dummy = be32_to_cpup(p++);
4579 if (dummy != res->sr_slotid) {
4580 dprintk("%s Invalid slot id\n", __func__);
4581 goto out_err;
4582 }
4583 /* highest slot id - currently not processed */
4584 dummy = be32_to_cpup(p++);
4585 /* target highest slot id - currently not processed */
4586 dummy = be32_to_cpup(p++);
4587 /* result flags - currently not processed */
4588 dummy = be32_to_cpup(p);
4589 status = 0;
4590 out_err:
4591 res->sr_status = status;
4592 return status;
4593 out_overflow:
4594 print_overflow_msg(__func__, xdr);
4595 status = -EIO;
4596 goto out_err;
4597 #else /* CONFIG_NFS_V4_1 */
4598 return 0;
4599 #endif /* CONFIG_NFS_V4_1 */
4600 }
4601
4602 /*
4603 * END OF "GENERIC" DECODE ROUTINES.
4604 */
4605
4606 /*
4607 * Decode OPEN_DOWNGRADE response
4608 */
4609 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4610 {
4611 struct xdr_stream xdr;
4612 struct compound_hdr hdr;
4613 int status;
4614
4615 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4616 status = decode_compound_hdr(&xdr, &hdr);
4617 if (status)
4618 goto out;
4619 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4620 if (status)
4621 goto out;
4622 status = decode_putfh(&xdr);
4623 if (status)
4624 goto out;
4625 status = decode_open_downgrade(&xdr, res);
4626 if (status != 0)
4627 goto out;
4628 decode_getfattr(&xdr, res->fattr, res->server,
4629 !RPC_IS_ASYNC(rqstp->rq_task));
4630 out:
4631 return status;
4632 }
4633
4634 /*
4635 * Decode ACCESS response
4636 */
4637 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4638 {
4639 struct xdr_stream xdr;
4640 struct compound_hdr hdr;
4641 int status;
4642
4643 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4644 status = decode_compound_hdr(&xdr, &hdr);
4645 if (status)
4646 goto out;
4647 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4648 if (status)
4649 goto out;
4650 status = decode_putfh(&xdr);
4651 if (status != 0)
4652 goto out;
4653 status = decode_access(&xdr, res);
4654 if (status != 0)
4655 goto out;
4656 decode_getfattr(&xdr, res->fattr, res->server,
4657 !RPC_IS_ASYNC(rqstp->rq_task));
4658 out:
4659 return status;
4660 }
4661
4662 /*
4663 * Decode LOOKUP response
4664 */
4665 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4666 {
4667 struct xdr_stream xdr;
4668 struct compound_hdr hdr;
4669 int status;
4670
4671 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4672 status = decode_compound_hdr(&xdr, &hdr);
4673 if (status)
4674 goto out;
4675 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4676 if (status)
4677 goto out;
4678 if ((status = decode_putfh(&xdr)) != 0)
4679 goto out;
4680 if ((status = decode_lookup(&xdr)) != 0)
4681 goto out;
4682 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4683 goto out;
4684 status = decode_getfattr(&xdr, res->fattr, res->server
4685 ,!RPC_IS_ASYNC(rqstp->rq_task));
4686 out:
4687 return status;
4688 }
4689
4690 /*
4691 * Decode LOOKUP_ROOT response
4692 */
4693 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4694 {
4695 struct xdr_stream xdr;
4696 struct compound_hdr hdr;
4697 int status;
4698
4699 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4700 status = decode_compound_hdr(&xdr, &hdr);
4701 if (status)
4702 goto out;
4703 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4704 if (status)
4705 goto out;
4706 if ((status = decode_putrootfh(&xdr)) != 0)
4707 goto out;
4708 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4709 status = decode_getfattr(&xdr, res->fattr, res->server,
4710 !RPC_IS_ASYNC(rqstp->rq_task));
4711 out:
4712 return status;
4713 }
4714
4715 /*
4716 * Decode REMOVE response
4717 */
4718 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4719 {
4720 struct xdr_stream xdr;
4721 struct compound_hdr hdr;
4722 int status;
4723
4724 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4725 status = decode_compound_hdr(&xdr, &hdr);
4726 if (status)
4727 goto out;
4728 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4729 if (status)
4730 goto out;
4731 if ((status = decode_putfh(&xdr)) != 0)
4732 goto out;
4733 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4734 goto out;
4735 decode_getfattr(&xdr, &res->dir_attr, res->server,
4736 !RPC_IS_ASYNC(rqstp->rq_task));
4737 out:
4738 return status;
4739 }
4740
4741 /*
4742 * Decode RENAME response
4743 */
4744 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4745 {
4746 struct xdr_stream xdr;
4747 struct compound_hdr hdr;
4748 int status;
4749
4750 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4751 status = decode_compound_hdr(&xdr, &hdr);
4752 if (status)
4753 goto out;
4754 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4755 if (status)
4756 goto out;
4757 if ((status = decode_putfh(&xdr)) != 0)
4758 goto out;
4759 if ((status = decode_savefh(&xdr)) != 0)
4760 goto out;
4761 if ((status = decode_putfh(&xdr)) != 0)
4762 goto out;
4763 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4764 goto out;
4765 /* Current FH is target directory */
4766 if (decode_getfattr(&xdr, res->new_fattr, res->server,
4767 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4768 goto out;
4769 if ((status = decode_restorefh(&xdr)) != 0)
4770 goto out;
4771 decode_getfattr(&xdr, res->old_fattr, res->server,
4772 !RPC_IS_ASYNC(rqstp->rq_task));
4773 out:
4774 return status;
4775 }
4776
4777 /*
4778 * Decode LINK response
4779 */
4780 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4781 {
4782 struct xdr_stream xdr;
4783 struct compound_hdr hdr;
4784 int status;
4785
4786 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4787 status = decode_compound_hdr(&xdr, &hdr);
4788 if (status)
4789 goto out;
4790 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4791 if (status)
4792 goto out;
4793 if ((status = decode_putfh(&xdr)) != 0)
4794 goto out;
4795 if ((status = decode_savefh(&xdr)) != 0)
4796 goto out;
4797 if ((status = decode_putfh(&xdr)) != 0)
4798 goto out;
4799 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4800 goto out;
4801 /*
4802 * Note order: OP_LINK leaves the directory as the current
4803 * filehandle.
4804 */
4805 if (decode_getfattr(&xdr, res->dir_attr, res->server,
4806 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4807 goto out;
4808 if ((status = decode_restorefh(&xdr)) != 0)
4809 goto out;
4810 decode_getfattr(&xdr, res->fattr, res->server,
4811 !RPC_IS_ASYNC(rqstp->rq_task));
4812 out:
4813 return status;
4814 }
4815
4816 /*
4817 * Decode CREATE response
4818 */
4819 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4820 {
4821 struct xdr_stream xdr;
4822 struct compound_hdr hdr;
4823 int status;
4824
4825 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4826 status = decode_compound_hdr(&xdr, &hdr);
4827 if (status)
4828 goto out;
4829 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4830 if (status)
4831 goto out;
4832 if ((status = decode_putfh(&xdr)) != 0)
4833 goto out;
4834 if ((status = decode_savefh(&xdr)) != 0)
4835 goto out;
4836 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4837 goto out;
4838 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4839 goto out;
4840 if (decode_getfattr(&xdr, res->fattr, res->server,
4841 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4842 goto out;
4843 if ((status = decode_restorefh(&xdr)) != 0)
4844 goto out;
4845 decode_getfattr(&xdr, res->dir_fattr, res->server,
4846 !RPC_IS_ASYNC(rqstp->rq_task));
4847 out:
4848 return status;
4849 }
4850
4851 /*
4852 * Decode SYMLINK response
4853 */
4854 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4855 {
4856 return nfs4_xdr_dec_create(rqstp, p, res);
4857 }
4858
4859 /*
4860 * Decode GETATTR response
4861 */
4862 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4863 {
4864 struct xdr_stream xdr;
4865 struct compound_hdr hdr;
4866 int status;
4867
4868 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4869 status = decode_compound_hdr(&xdr, &hdr);
4870 if (status)
4871 goto out;
4872 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4873 if (status)
4874 goto out;
4875 status = decode_putfh(&xdr);
4876 if (status)
4877 goto out;
4878 status = decode_getfattr(&xdr, res->fattr, res->server,
4879 !RPC_IS_ASYNC(rqstp->rq_task));
4880 out:
4881 return status;
4882 }
4883
4884 /*
4885 * Encode an SETACL request
4886 */
4887 static int
4888 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4889 {
4890 struct xdr_stream xdr;
4891 struct compound_hdr hdr = {
4892 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4893 };
4894 int status;
4895
4896 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4897 encode_compound_hdr(&xdr, req, &hdr);
4898 encode_sequence(&xdr, &args->seq_args, &hdr);
4899 encode_putfh(&xdr, args->fh, &hdr);
4900 status = encode_setacl(&xdr, args, &hdr);
4901 encode_nops(&hdr);
4902 return status;
4903 }
4904
4905 /*
4906 * Decode SETACL response
4907 */
4908 static int
4909 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4910 struct nfs_setaclres *res)
4911 {
4912 struct xdr_stream xdr;
4913 struct compound_hdr hdr;
4914 int status;
4915
4916 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4917 status = decode_compound_hdr(&xdr, &hdr);
4918 if (status)
4919 goto out;
4920 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4921 if (status)
4922 goto out;
4923 status = decode_putfh(&xdr);
4924 if (status)
4925 goto out;
4926 status = decode_setattr(&xdr);
4927 out:
4928 return status;
4929 }
4930
4931 /*
4932 * Decode GETACL response
4933 */
4934 static int
4935 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4936 struct nfs_getaclres *res)
4937 {
4938 struct xdr_stream xdr;
4939 struct compound_hdr hdr;
4940 int status;
4941
4942 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4943 status = decode_compound_hdr(&xdr, &hdr);
4944 if (status)
4945 goto out;
4946 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4947 if (status)
4948 goto out;
4949 status = decode_putfh(&xdr);
4950 if (status)
4951 goto out;
4952 status = decode_getacl(&xdr, rqstp, &res->acl_len);
4953
4954 out:
4955 return status;
4956 }
4957
4958 /*
4959 * Decode CLOSE response
4960 */
4961 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4962 {
4963 struct xdr_stream xdr;
4964 struct compound_hdr hdr;
4965 int status;
4966
4967 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4968 status = decode_compound_hdr(&xdr, &hdr);
4969 if (status)
4970 goto out;
4971 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4972 if (status)
4973 goto out;
4974 status = decode_putfh(&xdr);
4975 if (status)
4976 goto out;
4977 status = decode_close(&xdr, res);
4978 if (status != 0)
4979 goto out;
4980 /*
4981 * Note: Server may do delete on close for this file
4982 * in which case the getattr call will fail with
4983 * an ESTALE error. Shouldn't be a problem,
4984 * though, since fattr->valid will remain unset.
4985 */
4986 decode_getfattr(&xdr, res->fattr, res->server,
4987 !RPC_IS_ASYNC(rqstp->rq_task));
4988 out:
4989 return status;
4990 }
4991
4992 /*
4993 * Decode OPEN response
4994 */
4995 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4996 {
4997 struct xdr_stream xdr;
4998 struct compound_hdr hdr;
4999 int status;
5000
5001 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5002 status = decode_compound_hdr(&xdr, &hdr);
5003 if (status)
5004 goto out;
5005 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5006 if (status)
5007 goto out;
5008 status = decode_putfh(&xdr);
5009 if (status)
5010 goto out;
5011 status = decode_savefh(&xdr);
5012 if (status)
5013 goto out;
5014 status = decode_open(&xdr, res);
5015 if (status)
5016 goto out;
5017 if (decode_getfh(&xdr, &res->fh) != 0)
5018 goto out;
5019 if (decode_getfattr(&xdr, res->f_attr, res->server,
5020 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5021 goto out;
5022 if (decode_restorefh(&xdr) != 0)
5023 goto out;
5024 decode_getfattr(&xdr, res->dir_attr, res->server,
5025 !RPC_IS_ASYNC(rqstp->rq_task));
5026 out:
5027 return status;
5028 }
5029
5030 /*
5031 * Decode OPEN_CONFIRM response
5032 */
5033 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5034 {
5035 struct xdr_stream xdr;
5036 struct compound_hdr hdr;
5037 int status;
5038
5039 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5040 status = decode_compound_hdr(&xdr, &hdr);
5041 if (status)
5042 goto out;
5043 status = decode_putfh(&xdr);
5044 if (status)
5045 goto out;
5046 status = decode_open_confirm(&xdr, res);
5047 out:
5048 return status;
5049 }
5050
5051 /*
5052 * Decode OPEN response
5053 */
5054 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5055 {
5056 struct xdr_stream xdr;
5057 struct compound_hdr hdr;
5058 int status;
5059
5060 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5061 status = decode_compound_hdr(&xdr, &hdr);
5062 if (status)
5063 goto out;
5064 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5065 if (status)
5066 goto out;
5067 status = decode_putfh(&xdr);
5068 if (status)
5069 goto out;
5070 status = decode_open(&xdr, res);
5071 if (status)
5072 goto out;
5073 decode_getfattr(&xdr, res->f_attr, res->server,
5074 !RPC_IS_ASYNC(rqstp->rq_task));
5075 out:
5076 return status;
5077 }
5078
5079 /*
5080 * Decode SETATTR response
5081 */
5082 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5083 {
5084 struct xdr_stream xdr;
5085 struct compound_hdr hdr;
5086 int status;
5087
5088 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5089 status = decode_compound_hdr(&xdr, &hdr);
5090 if (status)
5091 goto out;
5092 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5093 if (status)
5094 goto out;
5095 status = decode_putfh(&xdr);
5096 if (status)
5097 goto out;
5098 status = decode_setattr(&xdr);
5099 if (status)
5100 goto out;
5101 decode_getfattr(&xdr, res->fattr, res->server,
5102 !RPC_IS_ASYNC(rqstp->rq_task));
5103 out:
5104 return status;
5105 }
5106
5107 /*
5108 * Decode LOCK response
5109 */
5110 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5111 {
5112 struct xdr_stream xdr;
5113 struct compound_hdr hdr;
5114 int status;
5115
5116 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5117 status = decode_compound_hdr(&xdr, &hdr);
5118 if (status)
5119 goto out;
5120 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5121 if (status)
5122 goto out;
5123 status = decode_putfh(&xdr);
5124 if (status)
5125 goto out;
5126 status = decode_lock(&xdr, res);
5127 out:
5128 return status;
5129 }
5130
5131 /*
5132 * Decode LOCKT response
5133 */
5134 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5135 {
5136 struct xdr_stream xdr;
5137 struct compound_hdr hdr;
5138 int status;
5139
5140 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5141 status = decode_compound_hdr(&xdr, &hdr);
5142 if (status)
5143 goto out;
5144 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5145 if (status)
5146 goto out;
5147 status = decode_putfh(&xdr);
5148 if (status)
5149 goto out;
5150 status = decode_lockt(&xdr, res);
5151 out:
5152 return status;
5153 }
5154
5155 /*
5156 * Decode LOCKU response
5157 */
5158 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5159 {
5160 struct xdr_stream xdr;
5161 struct compound_hdr hdr;
5162 int status;
5163
5164 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5165 status = decode_compound_hdr(&xdr, &hdr);
5166 if (status)
5167 goto out;
5168 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5169 if (status)
5170 goto out;
5171 status = decode_putfh(&xdr);
5172 if (status)
5173 goto out;
5174 status = decode_locku(&xdr, res);
5175 out:
5176 return status;
5177 }
5178
5179 /*
5180 * Decode READLINK response
5181 */
5182 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5183 struct nfs4_readlink_res *res)
5184 {
5185 struct xdr_stream xdr;
5186 struct compound_hdr hdr;
5187 int status;
5188
5189 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5190 status = decode_compound_hdr(&xdr, &hdr);
5191 if (status)
5192 goto out;
5193 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5194 if (status)
5195 goto out;
5196 status = decode_putfh(&xdr);
5197 if (status)
5198 goto out;
5199 status = decode_readlink(&xdr, rqstp);
5200 out:
5201 return status;
5202 }
5203
5204 /*
5205 * Decode READDIR response
5206 */
5207 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5208 {
5209 struct xdr_stream xdr;
5210 struct compound_hdr hdr;
5211 int status;
5212
5213 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5214 status = decode_compound_hdr(&xdr, &hdr);
5215 if (status)
5216 goto out;
5217 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5218 if (status)
5219 goto out;
5220 status = decode_putfh(&xdr);
5221 if (status)
5222 goto out;
5223 status = decode_readdir(&xdr, rqstp, res);
5224 out:
5225 return status;
5226 }
5227
5228 /*
5229 * Decode Read response
5230 */
5231 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5232 {
5233 struct xdr_stream xdr;
5234 struct compound_hdr hdr;
5235 int status;
5236
5237 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5238 status = decode_compound_hdr(&xdr, &hdr);
5239 if (status)
5240 goto out;
5241 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5242 if (status)
5243 goto out;
5244 status = decode_putfh(&xdr);
5245 if (status)
5246 goto out;
5247 status = decode_read(&xdr, rqstp, res);
5248 if (!status)
5249 status = res->count;
5250 out:
5251 return status;
5252 }
5253
5254 /*
5255 * Decode WRITE response
5256 */
5257 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5258 {
5259 struct xdr_stream xdr;
5260 struct compound_hdr hdr;
5261 int status;
5262
5263 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5264 status = decode_compound_hdr(&xdr, &hdr);
5265 if (status)
5266 goto out;
5267 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5268 if (status)
5269 goto out;
5270 status = decode_putfh(&xdr);
5271 if (status)
5272 goto out;
5273 status = decode_write(&xdr, res);
5274 if (status)
5275 goto out;
5276 decode_getfattr(&xdr, res->fattr, res->server,
5277 !RPC_IS_ASYNC(rqstp->rq_task));
5278 if (!status)
5279 status = res->count;
5280 out:
5281 return status;
5282 }
5283
5284 /*
5285 * Decode COMMIT response
5286 */
5287 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5288 {
5289 struct xdr_stream xdr;
5290 struct compound_hdr hdr;
5291 int status;
5292
5293 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5294 status = decode_compound_hdr(&xdr, &hdr);
5295 if (status)
5296 goto out;
5297 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5298 if (status)
5299 goto out;
5300 status = decode_putfh(&xdr);
5301 if (status)
5302 goto out;
5303 status = decode_commit(&xdr, res);
5304 if (status)
5305 goto out;
5306 decode_getfattr(&xdr, res->fattr, res->server,
5307 !RPC_IS_ASYNC(rqstp->rq_task));
5308 out:
5309 return status;
5310 }
5311
5312 /*
5313 * FSINFO request
5314 */
5315 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5316 struct nfs4_fsinfo_res *res)
5317 {
5318 struct xdr_stream xdr;
5319 struct compound_hdr hdr;
5320 int status;
5321
5322 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5323 status = decode_compound_hdr(&xdr, &hdr);
5324 if (!status)
5325 status = decode_sequence(&xdr, &res->seq_res, req);
5326 if (!status)
5327 status = decode_putfh(&xdr);
5328 if (!status)
5329 status = decode_fsinfo(&xdr, res->fsinfo);
5330 return status;
5331 }
5332
5333 /*
5334 * PATHCONF request
5335 */
5336 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5337 struct nfs4_pathconf_res *res)
5338 {
5339 struct xdr_stream xdr;
5340 struct compound_hdr hdr;
5341 int status;
5342
5343 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5344 status = decode_compound_hdr(&xdr, &hdr);
5345 if (!status)
5346 status = decode_sequence(&xdr, &res->seq_res, req);
5347 if (!status)
5348 status = decode_putfh(&xdr);
5349 if (!status)
5350 status = decode_pathconf(&xdr, res->pathconf);
5351 return status;
5352 }
5353
5354 /*
5355 * STATFS request
5356 */
5357 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5358 struct nfs4_statfs_res *res)
5359 {
5360 struct xdr_stream xdr;
5361 struct compound_hdr hdr;
5362 int status;
5363
5364 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5365 status = decode_compound_hdr(&xdr, &hdr);
5366 if (!status)
5367 status = decode_sequence(&xdr, &res->seq_res, req);
5368 if (!status)
5369 status = decode_putfh(&xdr);
5370 if (!status)
5371 status = decode_statfs(&xdr, res->fsstat);
5372 return status;
5373 }
5374
5375 /*
5376 * GETATTR_BITMAP request
5377 */
5378 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5379 {
5380 struct xdr_stream xdr;
5381 struct compound_hdr hdr;
5382 int status;
5383
5384 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5385 status = decode_compound_hdr(&xdr, &hdr);
5386 if (status)
5387 goto out;
5388 status = decode_sequence(&xdr, &res->seq_res, req);
5389 if (status)
5390 goto out;
5391 if ((status = decode_putfh(&xdr)) != 0)
5392 goto out;
5393 status = decode_server_caps(&xdr, res);
5394 out:
5395 return status;
5396 }
5397
5398 /*
5399 * Decode RENEW response
5400 */
5401 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5402 {
5403 struct xdr_stream xdr;
5404 struct compound_hdr hdr;
5405 int status;
5406
5407 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5408 status = decode_compound_hdr(&xdr, &hdr);
5409 if (!status)
5410 status = decode_renew(&xdr);
5411 return status;
5412 }
5413
5414 /*
5415 * a SETCLIENTID request
5416 */
5417 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5418 struct nfs_client *clp)
5419 {
5420 struct xdr_stream xdr;
5421 struct compound_hdr hdr;
5422 int status;
5423
5424 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5425 status = decode_compound_hdr(&xdr, &hdr);
5426 if (!status)
5427 status = decode_setclientid(&xdr, clp);
5428 return status;
5429 }
5430
5431 /*
5432 * a SETCLIENTID_CONFIRM request
5433 */
5434 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5435 {
5436 struct xdr_stream xdr;
5437 struct compound_hdr hdr;
5438 int status;
5439
5440 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5441 status = decode_compound_hdr(&xdr, &hdr);
5442 if (!status)
5443 status = decode_setclientid_confirm(&xdr);
5444 if (!status)
5445 status = decode_putrootfh(&xdr);
5446 if (!status)
5447 status = decode_fsinfo(&xdr, fsinfo);
5448 return status;
5449 }
5450
5451 /*
5452 * DELEGRETURN request
5453 */
5454 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5455 {
5456 struct xdr_stream xdr;
5457 struct compound_hdr hdr;
5458 int status;
5459
5460 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5461 status = decode_compound_hdr(&xdr, &hdr);
5462 if (status)
5463 goto out;
5464 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5465 if (status)
5466 goto out;
5467 status = decode_putfh(&xdr);
5468 if (status != 0)
5469 goto out;
5470 status = decode_delegreturn(&xdr);
5471 decode_getfattr(&xdr, res->fattr, res->server,
5472 !RPC_IS_ASYNC(rqstp->rq_task));
5473 out:
5474 return status;
5475 }
5476
5477 /*
5478 * FS_LOCATIONS request
5479 */
5480 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5481 struct nfs4_fs_locations_res *res)
5482 {
5483 struct xdr_stream xdr;
5484 struct compound_hdr hdr;
5485 int status;
5486
5487 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5488 status = decode_compound_hdr(&xdr, &hdr);
5489 if (status)
5490 goto out;
5491 status = decode_sequence(&xdr, &res->seq_res, req);
5492 if (status)
5493 goto out;
5494 if ((status = decode_putfh(&xdr)) != 0)
5495 goto out;
5496 if ((status = decode_lookup(&xdr)) != 0)
5497 goto out;
5498 xdr_enter_page(&xdr, PAGE_SIZE);
5499 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5500 res->fs_locations->server,
5501 !RPC_IS_ASYNC(req->rq_task));
5502 out:
5503 return status;
5504 }
5505
5506 #if defined(CONFIG_NFS_V4_1)
5507 /*
5508 * EXCHANGE_ID request
5509 */
5510 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5511 void *res)
5512 {
5513 struct xdr_stream xdr;
5514 struct compound_hdr hdr;
5515 int status;
5516
5517 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5518 status = decode_compound_hdr(&xdr, &hdr);
5519 if (!status)
5520 status = decode_exchange_id(&xdr, res);
5521 return status;
5522 }
5523
5524 /*
5525 * a CREATE_SESSION request
5526 */
5527 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5528 struct nfs41_create_session_res *res)
5529 {
5530 struct xdr_stream xdr;
5531 struct compound_hdr hdr;
5532 int status;
5533
5534 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5535 status = decode_compound_hdr(&xdr, &hdr);
5536 if (!status)
5537 status = decode_create_session(&xdr, res);
5538 return status;
5539 }
5540
5541 /*
5542 * a DESTROY_SESSION request
5543 */
5544 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5545 void *dummy)
5546 {
5547 struct xdr_stream xdr;
5548 struct compound_hdr hdr;
5549 int status;
5550
5551 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5552 status = decode_compound_hdr(&xdr, &hdr);
5553 if (!status)
5554 status = decode_destroy_session(&xdr, dummy);
5555 return status;
5556 }
5557
5558 /*
5559 * a SEQUENCE request
5560 */
5561 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5562 struct nfs4_sequence_res *res)
5563 {
5564 struct xdr_stream xdr;
5565 struct compound_hdr hdr;
5566 int status;
5567
5568 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5569 status = decode_compound_hdr(&xdr, &hdr);
5570 if (!status)
5571 status = decode_sequence(&xdr, res, rqstp);
5572 return status;
5573 }
5574
5575 /*
5576 * a GET_LEASE_TIME request
5577 */
5578 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5579 struct nfs4_get_lease_time_res *res)
5580 {
5581 struct xdr_stream xdr;
5582 struct compound_hdr hdr;
5583 int status;
5584
5585 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5586 status = decode_compound_hdr(&xdr, &hdr);
5587 if (!status)
5588 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5589 if (!status)
5590 status = decode_putrootfh(&xdr);
5591 if (!status)
5592 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5593 return status;
5594 }
5595 #endif /* CONFIG_NFS_V4_1 */
5596
5597 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5598 {
5599 uint32_t bitmap[2] = {0};
5600 uint32_t len;
5601
5602 if (!*p++) {
5603 if (!*p)
5604 return ERR_PTR(-EAGAIN);
5605 entry->eof = 1;
5606 return ERR_PTR(-EBADCOOKIE);
5607 }
5608
5609 entry->prev_cookie = entry->cookie;
5610 p = xdr_decode_hyper(p, &entry->cookie);
5611 entry->len = ntohl(*p++);
5612 entry->name = (const char *) p;
5613 p += XDR_QUADLEN(entry->len);
5614
5615 /*
5616 * In case the server doesn't return an inode number,
5617 * we fake one here. (We don't use inode number 0,
5618 * since glibc seems to choke on it...)
5619 */
5620 entry->ino = 1;
5621
5622 len = ntohl(*p++); /* bitmap length */
5623 if (len-- > 0) {
5624 bitmap[0] = ntohl(*p++);
5625 if (len-- > 0) {
5626 bitmap[1] = ntohl(*p++);
5627 p += len;
5628 }
5629 }
5630 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5631 if (len > 0) {
5632 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5633 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5634 /* Ignore the return value of rdattr_error for now */
5635 p++;
5636 len--;
5637 }
5638 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5639 xdr_decode_hyper(p, &entry->ino);
5640 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5641 xdr_decode_hyper(p, &entry->ino);
5642 p += len;
5643 }
5644
5645 entry->eof = !p[0] && p[1];
5646 return p;
5647 }
5648
5649 /*
5650 * We need to translate between nfs status return values and
5651 * the local errno values which may not be the same.
5652 */
5653 static struct {
5654 int stat;
5655 int errno;
5656 } nfs_errtbl[] = {
5657 { NFS4_OK, 0 },
5658 { NFS4ERR_PERM, -EPERM },
5659 { NFS4ERR_NOENT, -ENOENT },
5660 { NFS4ERR_IO, -errno_NFSERR_IO},
5661 { NFS4ERR_NXIO, -ENXIO },
5662 { NFS4ERR_ACCESS, -EACCES },
5663 { NFS4ERR_EXIST, -EEXIST },
5664 { NFS4ERR_XDEV, -EXDEV },
5665 { NFS4ERR_NOTDIR, -ENOTDIR },
5666 { NFS4ERR_ISDIR, -EISDIR },
5667 { NFS4ERR_INVAL, -EINVAL },
5668 { NFS4ERR_FBIG, -EFBIG },
5669 { NFS4ERR_NOSPC, -ENOSPC },
5670 { NFS4ERR_ROFS, -EROFS },
5671 { NFS4ERR_MLINK, -EMLINK },
5672 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
5673 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
5674 { NFS4ERR_DQUOT, -EDQUOT },
5675 { NFS4ERR_STALE, -ESTALE },
5676 { NFS4ERR_BADHANDLE, -EBADHANDLE },
5677 { NFS4ERR_BADOWNER, -EINVAL },
5678 { NFS4ERR_BADNAME, -EINVAL },
5679 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
5680 { NFS4ERR_NOTSUPP, -ENOTSUPP },
5681 { NFS4ERR_TOOSMALL, -ETOOSMALL },
5682 { NFS4ERR_SERVERFAULT, -ESERVERFAULT },
5683 { NFS4ERR_BADTYPE, -EBADTYPE },
5684 { NFS4ERR_LOCKED, -EAGAIN },
5685 { NFS4ERR_RESOURCE, -EREMOTEIO },
5686 { NFS4ERR_SYMLINK, -ELOOP },
5687 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5688 { NFS4ERR_DEADLOCK, -EDEADLK },
5689 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5690 * to be handled by a
5691 * middle-layer.
5692 */
5693 { -1, -EIO }
5694 };
5695
5696 /*
5697 * Convert an NFS error code to a local one.
5698 * This one is used jointly by NFSv2 and NFSv3.
5699 */
5700 static int
5701 nfs4_stat_to_errno(int stat)
5702 {
5703 int i;
5704 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5705 if (nfs_errtbl[i].stat == stat)
5706 return nfs_errtbl[i].errno;
5707 }
5708 if (stat <= 10000 || stat > 10100) {
5709 /* The server is looney tunes. */
5710 return -ESERVERFAULT;
5711 }
5712 /* If we cannot translate the error, the recovery routines should
5713 * handle it.
5714 * Note: remaining NFSv4 error codes have values > 10000, so should
5715 * not conflict with native Linux error codes.
5716 */
5717 return -stat;
5718 }
5719
5720 #define PROC(proc, argtype, restype) \
5721 [NFSPROC4_CLNT_##proc] = { \
5722 .p_proc = NFSPROC4_COMPOUND, \
5723 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5724 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5725 .p_arglen = NFS4_##argtype##_sz, \
5726 .p_replen = NFS4_##restype##_sz, \
5727 .p_statidx = NFSPROC4_CLNT_##proc, \
5728 .p_name = #proc, \
5729 }
5730
5731 struct rpc_procinfo nfs4_procedures[] = {
5732 PROC(READ, enc_read, dec_read),
5733 PROC(WRITE, enc_write, dec_write),
5734 PROC(COMMIT, enc_commit, dec_commit),
5735 PROC(OPEN, enc_open, dec_open),
5736 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5737 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5738 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5739 PROC(CLOSE, enc_close, dec_close),
5740 PROC(SETATTR, enc_setattr, dec_setattr),
5741 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5742 PROC(RENEW, enc_renew, dec_renew),
5743 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5744 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5745 PROC(LOCK, enc_lock, dec_lock),
5746 PROC(LOCKT, enc_lockt, dec_lockt),
5747 PROC(LOCKU, enc_locku, dec_locku),
5748 PROC(ACCESS, enc_access, dec_access),
5749 PROC(GETATTR, enc_getattr, dec_getattr),
5750 PROC(LOOKUP, enc_lookup, dec_lookup),
5751 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5752 PROC(REMOVE, enc_remove, dec_remove),
5753 PROC(RENAME, enc_rename, dec_rename),
5754 PROC(LINK, enc_link, dec_link),
5755 PROC(SYMLINK, enc_symlink, dec_symlink),
5756 PROC(CREATE, enc_create, dec_create),
5757 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5758 PROC(STATFS, enc_statfs, dec_statfs),
5759 PROC(READLINK, enc_readlink, dec_readlink),
5760 PROC(READDIR, enc_readdir, dec_readdir),
5761 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5762 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5763 PROC(GETACL, enc_getacl, dec_getacl),
5764 PROC(SETACL, enc_setacl, dec_setacl),
5765 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5766 #if defined(CONFIG_NFS_V4_1)
5767 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5768 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
5769 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
5770 PROC(SEQUENCE, enc_sequence, dec_sequence),
5771 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
5772 #endif /* CONFIG_NFS_V4_1 */
5773 };
5774
5775 struct rpc_version nfs_version4 = {
5776 .number = 4,
5777 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5778 .procs = nfs4_procedures
5779 };
5780
5781 /*
5782 * Local variables:
5783 * c-basic-offset: 8
5784 * End:
5785 */
Linus' kernel tree