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[mirror_ubuntu-bionic-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/nfs.h>
50 #include <linux/nfs4.h>
51 #include <linux/nfs_fs.h>
52 #include <linux/nfs_idmap.h>
53 #include "nfs4_fs.h"
54 #include "internal.h"
55
56 #define NFSDBG_FACILITY NFSDBG_XDR
57
58 /* Mapping from NFS error code to "errno" error code. */
59 #define errno_NFSERR_IO EIO
60
61 static int nfs4_stat_to_errno(int);
62
63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64 #ifdef DEBUG
65 #define NFS4_MAXTAGLEN 20
66 #else
67 #define NFS4_MAXTAGLEN 0
68 #endif
69
70 /* lock,open owner id:
71 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
72 */
73 #define open_owner_id_maxsz (1 + 4)
74 #define lock_owner_id_maxsz (1 + 4)
75 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
76 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
77 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define op_encode_hdr_maxsz (1)
79 #define op_decode_hdr_maxsz (2)
80 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
81 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
83 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
85 (NFS4_FHSIZE >> 2))
86 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
87 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
88 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
91 ((3+NFS4_FHSIZE) >> 2))
92 #define nfs4_fattr_bitmap_maxsz 3
93 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
94 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
95 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
96 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
97 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 /* This is based on getfattr, which uses the most attributes: */
99 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
100 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
101 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
102 nfs4_fattr_value_maxsz)
103 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
104 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
105 1 + 2 + 1 + \
106 nfs4_owner_maxsz + \
107 nfs4_group_maxsz + \
108 4 + 4)
109 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
110 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
111 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
114 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
115 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
116 #define decode_renew_maxsz (op_decode_hdr_maxsz)
117 #define encode_setclientid_maxsz \
118 (op_encode_hdr_maxsz + \
119 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
120 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
121 1 /* sc_prog */ + \
122 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
123 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
124 1) /* sc_cb_ident */
125 #define decode_setclientid_maxsz \
126 (op_decode_hdr_maxsz + \
127 2 + \
128 1024) /* large value for CLID_INUSE */
129 #define encode_setclientid_confirm_maxsz \
130 (op_encode_hdr_maxsz + \
131 3 + (NFS4_VERIFIER_SIZE >> 2))
132 #define decode_setclientid_confirm_maxsz \
133 (op_decode_hdr_maxsz)
134 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
135 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
136 #define encode_share_access_maxsz \
137 (2)
138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
139 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
141 #define encode_open_maxsz (op_encode_hdr_maxsz + \
142 2 + encode_share_access_maxsz + 2 + \
143 open_owner_id_maxsz + \
144 encode_opentype_maxsz + \
145 encode_claim_null_maxsz)
146 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
148 decode_ace_maxsz)
149 #define decode_change_info_maxsz (5)
150 #define decode_open_maxsz (op_decode_hdr_maxsz + \
151 decode_stateid_maxsz + \
152 decode_change_info_maxsz + 1 + \
153 nfs4_fattr_bitmap_maxsz + \
154 decode_delegation_maxsz)
155 #define encode_open_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 encode_stateid_maxsz + 1)
158 #define decode_open_confirm_maxsz \
159 (op_decode_hdr_maxsz + \
160 decode_stateid_maxsz)
161 #define encode_open_downgrade_maxsz \
162 (op_encode_hdr_maxsz + \
163 encode_stateid_maxsz + 1 + \
164 encode_share_access_maxsz)
165 #define decode_open_downgrade_maxsz \
166 (op_decode_hdr_maxsz + \
167 decode_stateid_maxsz)
168 #define encode_close_maxsz (op_encode_hdr_maxsz + \
169 1 + encode_stateid_maxsz)
170 #define decode_close_maxsz (op_decode_hdr_maxsz + \
171 decode_stateid_maxsz)
172 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
173 encode_stateid_maxsz + \
174 encode_attrs_maxsz)
175 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
176 nfs4_fattr_bitmap_maxsz)
177 #define encode_read_maxsz (op_encode_hdr_maxsz + \
178 encode_stateid_maxsz + 3)
179 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
180 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
181 2 + encode_verifier_maxsz + 5)
182 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
183 decode_verifier_maxsz)
184 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
185 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
186 #define encode_write_maxsz (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 4)
188 #define decode_write_maxsz (op_decode_hdr_maxsz + \
189 2 + decode_verifier_maxsz)
190 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
191 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
192 decode_verifier_maxsz)
193 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
194 nfs4_name_maxsz)
195 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
196 decode_change_info_maxsz)
197 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
198 2 * nfs4_name_maxsz)
199 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
200 decode_change_info_maxsz + \
201 decode_change_info_maxsz)
202 #define encode_link_maxsz (op_encode_hdr_maxsz + \
203 nfs4_name_maxsz)
204 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
205 #define encode_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 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
304 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
305 #else /* CONFIG_NFS_V4_1 */
306 #define encode_sequence_maxsz 0
307 #define decode_sequence_maxsz 0
308 #endif /* CONFIG_NFS_V4_1 */
309
310 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
311 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
312 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
313 encode_sequence_maxsz + \
314 encode_putfh_maxsz + \
315 encode_read_maxsz)
316 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
317 decode_sequence_maxsz + \
318 decode_putfh_maxsz + \
319 decode_read_maxsz)
320 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
321 encode_sequence_maxsz + \
322 encode_putfh_maxsz + \
323 encode_readlink_maxsz)
324 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
325 decode_sequence_maxsz + \
326 decode_putfh_maxsz + \
327 decode_readlink_maxsz)
328 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
329 encode_sequence_maxsz + \
330 encode_putfh_maxsz + \
331 encode_readdir_maxsz)
332 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
333 decode_sequence_maxsz + \
334 decode_putfh_maxsz + \
335 decode_readdir_maxsz)
336 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
337 encode_sequence_maxsz + \
338 encode_putfh_maxsz + \
339 encode_write_maxsz + \
340 encode_getattr_maxsz)
341 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
342 decode_sequence_maxsz + \
343 decode_putfh_maxsz + \
344 decode_write_maxsz + \
345 decode_getattr_maxsz)
346 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
347 encode_sequence_maxsz + \
348 encode_putfh_maxsz + \
349 encode_commit_maxsz + \
350 encode_getattr_maxsz)
351 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
352 decode_sequence_maxsz + \
353 decode_putfh_maxsz + \
354 decode_commit_maxsz + \
355 decode_getattr_maxsz)
356 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
357 encode_sequence_maxsz + \
358 encode_putfh_maxsz + \
359 encode_savefh_maxsz + \
360 encode_open_maxsz + \
361 encode_getfh_maxsz + \
362 encode_getattr_maxsz + \
363 encode_restorefh_maxsz + \
364 encode_getattr_maxsz)
365 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
366 decode_sequence_maxsz + \
367 decode_putfh_maxsz + \
368 decode_savefh_maxsz + \
369 decode_open_maxsz + \
370 decode_getfh_maxsz + \
371 decode_getattr_maxsz + \
372 decode_restorefh_maxsz + \
373 decode_getattr_maxsz)
374 #define NFS4_enc_open_confirm_sz \
375 (compound_encode_hdr_maxsz + \
376 encode_putfh_maxsz + \
377 encode_open_confirm_maxsz)
378 #define NFS4_dec_open_confirm_sz \
379 (compound_decode_hdr_maxsz + \
380 decode_putfh_maxsz + \
381 decode_open_confirm_maxsz)
382 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
383 encode_sequence_maxsz + \
384 encode_putfh_maxsz + \
385 encode_open_maxsz + \
386 encode_getattr_maxsz)
387 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
388 decode_sequence_maxsz + \
389 decode_putfh_maxsz + \
390 decode_open_maxsz + \
391 decode_getattr_maxsz)
392 #define NFS4_enc_open_downgrade_sz \
393 (compound_encode_hdr_maxsz + \
394 encode_sequence_maxsz + \
395 encode_putfh_maxsz + \
396 encode_open_downgrade_maxsz + \
397 encode_getattr_maxsz)
398 #define NFS4_dec_open_downgrade_sz \
399 (compound_decode_hdr_maxsz + \
400 decode_sequence_maxsz + \
401 decode_putfh_maxsz + \
402 decode_open_downgrade_maxsz + \
403 decode_getattr_maxsz)
404 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
405 encode_sequence_maxsz + \
406 encode_putfh_maxsz + \
407 encode_close_maxsz + \
408 encode_getattr_maxsz)
409 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
410 decode_sequence_maxsz + \
411 decode_putfh_maxsz + \
412 decode_close_maxsz + \
413 decode_getattr_maxsz)
414 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
415 encode_sequence_maxsz + \
416 encode_putfh_maxsz + \
417 encode_setattr_maxsz + \
418 encode_getattr_maxsz)
419 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
420 decode_sequence_maxsz + \
421 decode_putfh_maxsz + \
422 decode_setattr_maxsz + \
423 decode_getattr_maxsz)
424 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
425 encode_sequence_maxsz + \
426 encode_putfh_maxsz + \
427 encode_fsinfo_maxsz)
428 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
429 decode_sequence_maxsz + \
430 decode_putfh_maxsz + \
431 decode_fsinfo_maxsz)
432 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
433 encode_renew_maxsz)
434 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
435 decode_renew_maxsz)
436 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
437 encode_setclientid_maxsz)
438 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
439 decode_setclientid_maxsz)
440 #define NFS4_enc_setclientid_confirm_sz \
441 (compound_encode_hdr_maxsz + \
442 encode_setclientid_confirm_maxsz + \
443 encode_putrootfh_maxsz + \
444 encode_fsinfo_maxsz)
445 #define NFS4_dec_setclientid_confirm_sz \
446 (compound_decode_hdr_maxsz + \
447 decode_setclientid_confirm_maxsz + \
448 decode_putrootfh_maxsz + \
449 decode_fsinfo_maxsz)
450 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
451 encode_sequence_maxsz + \
452 encode_putfh_maxsz + \
453 encode_lock_maxsz)
454 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
455 decode_sequence_maxsz + \
456 decode_putfh_maxsz + \
457 decode_lock_maxsz)
458 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
459 encode_sequence_maxsz + \
460 encode_putfh_maxsz + \
461 encode_lockt_maxsz)
462 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
463 decode_sequence_maxsz + \
464 decode_putfh_maxsz + \
465 decode_lockt_maxsz)
466 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
467 encode_sequence_maxsz + \
468 encode_putfh_maxsz + \
469 encode_locku_maxsz)
470 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_locku_maxsz)
474 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
475 encode_sequence_maxsz + \
476 encode_putfh_maxsz + \
477 encode_access_maxsz + \
478 encode_getattr_maxsz)
479 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
480 decode_sequence_maxsz + \
481 decode_putfh_maxsz + \
482 decode_access_maxsz + \
483 decode_getattr_maxsz)
484 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
485 encode_sequence_maxsz + \
486 encode_putfh_maxsz + \
487 encode_getattr_maxsz)
488 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
489 decode_sequence_maxsz + \
490 decode_putfh_maxsz + \
491 decode_getattr_maxsz)
492 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
493 encode_sequence_maxsz + \
494 encode_putfh_maxsz + \
495 encode_lookup_maxsz + \
496 encode_getattr_maxsz + \
497 encode_getfh_maxsz)
498 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
499 decode_sequence_maxsz + \
500 decode_putfh_maxsz + \
501 decode_lookup_maxsz + \
502 decode_getattr_maxsz + \
503 decode_getfh_maxsz)
504 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
505 encode_sequence_maxsz + \
506 encode_putrootfh_maxsz + \
507 encode_getattr_maxsz + \
508 encode_getfh_maxsz)
509 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
510 decode_sequence_maxsz + \
511 decode_putrootfh_maxsz + \
512 decode_getattr_maxsz + \
513 decode_getfh_maxsz)
514 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
515 encode_sequence_maxsz + \
516 encode_putfh_maxsz + \
517 encode_remove_maxsz + \
518 encode_getattr_maxsz)
519 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
520 decode_sequence_maxsz + \
521 decode_putfh_maxsz + \
522 decode_remove_maxsz + \
523 decode_getattr_maxsz)
524 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
525 encode_sequence_maxsz + \
526 encode_putfh_maxsz + \
527 encode_savefh_maxsz + \
528 encode_putfh_maxsz + \
529 encode_rename_maxsz + \
530 encode_getattr_maxsz + \
531 encode_restorefh_maxsz + \
532 encode_getattr_maxsz)
533 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
534 decode_sequence_maxsz + \
535 decode_putfh_maxsz + \
536 decode_savefh_maxsz + \
537 decode_putfh_maxsz + \
538 decode_rename_maxsz + \
539 decode_getattr_maxsz + \
540 decode_restorefh_maxsz + \
541 decode_getattr_maxsz)
542 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
543 encode_sequence_maxsz + \
544 encode_putfh_maxsz + \
545 encode_savefh_maxsz + \
546 encode_putfh_maxsz + \
547 encode_link_maxsz + \
548 decode_getattr_maxsz + \
549 encode_restorefh_maxsz + \
550 decode_getattr_maxsz)
551 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
552 decode_sequence_maxsz + \
553 decode_putfh_maxsz + \
554 decode_savefh_maxsz + \
555 decode_putfh_maxsz + \
556 decode_link_maxsz + \
557 decode_getattr_maxsz + \
558 decode_restorefh_maxsz + \
559 decode_getattr_maxsz)
560 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
561 encode_sequence_maxsz + \
562 encode_putfh_maxsz + \
563 encode_symlink_maxsz + \
564 encode_getattr_maxsz + \
565 encode_getfh_maxsz)
566 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
567 decode_sequence_maxsz + \
568 decode_putfh_maxsz + \
569 decode_symlink_maxsz + \
570 decode_getattr_maxsz + \
571 decode_getfh_maxsz)
572 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
573 encode_sequence_maxsz + \
574 encode_putfh_maxsz + \
575 encode_savefh_maxsz + \
576 encode_create_maxsz + \
577 encode_getfh_maxsz + \
578 encode_getattr_maxsz + \
579 encode_restorefh_maxsz + \
580 encode_getattr_maxsz)
581 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
582 decode_sequence_maxsz + \
583 decode_putfh_maxsz + \
584 decode_savefh_maxsz + \
585 decode_create_maxsz + \
586 decode_getfh_maxsz + \
587 decode_getattr_maxsz + \
588 decode_restorefh_maxsz + \
589 decode_getattr_maxsz)
590 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
591 encode_sequence_maxsz + \
592 encode_putfh_maxsz + \
593 encode_getattr_maxsz)
594 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_getattr_maxsz)
598 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
599 encode_sequence_maxsz + \
600 encode_putfh_maxsz + \
601 encode_statfs_maxsz)
602 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
603 decode_sequence_maxsz + \
604 decode_putfh_maxsz + \
605 decode_statfs_maxsz)
606 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
607 encode_sequence_maxsz + \
608 encode_putfh_maxsz + \
609 encode_getattr_maxsz)
610 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
611 decode_sequence_maxsz + \
612 decode_putfh_maxsz + \
613 decode_getattr_maxsz)
614 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
615 encode_sequence_maxsz + \
616 encode_putfh_maxsz + \
617 encode_delegreturn_maxsz + \
618 encode_getattr_maxsz)
619 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
620 decode_sequence_maxsz + \
621 decode_delegreturn_maxsz + \
622 decode_getattr_maxsz)
623 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
624 encode_sequence_maxsz + \
625 encode_putfh_maxsz + \
626 encode_getacl_maxsz)
627 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
628 decode_sequence_maxsz + \
629 decode_putfh_maxsz + \
630 decode_getacl_maxsz)
631 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
632 encode_sequence_maxsz + \
633 encode_putfh_maxsz + \
634 encode_setacl_maxsz)
635 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
636 decode_sequence_maxsz + \
637 decode_putfh_maxsz + \
638 decode_setacl_maxsz)
639 #define NFS4_enc_fs_locations_sz \
640 (compound_encode_hdr_maxsz + \
641 encode_sequence_maxsz + \
642 encode_putfh_maxsz + \
643 encode_lookup_maxsz + \
644 encode_fs_locations_maxsz)
645 #define NFS4_dec_fs_locations_sz \
646 (compound_decode_hdr_maxsz + \
647 decode_sequence_maxsz + \
648 decode_putfh_maxsz + \
649 decode_lookup_maxsz + \
650 decode_fs_locations_maxsz)
651 #if defined(CONFIG_NFS_V4_1)
652 #define NFS4_enc_exchange_id_sz \
653 (compound_encode_hdr_maxsz + \
654 encode_exchange_id_maxsz)
655 #define NFS4_dec_exchange_id_sz \
656 (compound_decode_hdr_maxsz + \
657 decode_exchange_id_maxsz)
658 #define NFS4_enc_create_session_sz \
659 (compound_encode_hdr_maxsz + \
660 encode_create_session_maxsz)
661 #define NFS4_dec_create_session_sz \
662 (compound_decode_hdr_maxsz + \
663 decode_create_session_maxsz)
664 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
665 encode_destroy_session_maxsz)
666 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
667 decode_destroy_session_maxsz)
668 #define NFS4_enc_sequence_sz \
669 (compound_decode_hdr_maxsz + \
670 encode_sequence_maxsz)
671 #define NFS4_dec_sequence_sz \
672 (compound_decode_hdr_maxsz + \
673 decode_sequence_maxsz)
674 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
675 encode_sequence_maxsz + \
676 encode_putrootfh_maxsz + \
677 encode_fsinfo_maxsz)
678 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
679 decode_sequence_maxsz + \
680 decode_putrootfh_maxsz + \
681 decode_fsinfo_maxsz)
682 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
683 encode_sequence_maxsz + \
684 encode_reclaim_complete_maxsz)
685 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
686 decode_sequence_maxsz + \
687 decode_reclaim_complete_maxsz)
688
689 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
690 compound_encode_hdr_maxsz +
691 encode_sequence_maxsz +
692 encode_putfh_maxsz +
693 encode_getattr_maxsz) *
694 XDR_UNIT);
695
696 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
697 compound_decode_hdr_maxsz +
698 decode_sequence_maxsz +
699 decode_putfh_maxsz) *
700 XDR_UNIT);
701 #endif /* CONFIG_NFS_V4_1 */
702
703 static const umode_t nfs_type2fmt[] = {
704 [NF4BAD] = 0,
705 [NF4REG] = S_IFREG,
706 [NF4DIR] = S_IFDIR,
707 [NF4BLK] = S_IFBLK,
708 [NF4CHR] = S_IFCHR,
709 [NF4LNK] = S_IFLNK,
710 [NF4SOCK] = S_IFSOCK,
711 [NF4FIFO] = S_IFIFO,
712 [NF4ATTRDIR] = 0,
713 [NF4NAMEDATTR] = 0,
714 };
715
716 struct compound_hdr {
717 int32_t status;
718 uint32_t nops;
719 __be32 * nops_p;
720 uint32_t taglen;
721 char * tag;
722 uint32_t replen; /* expected reply words */
723 u32 minorversion;
724 };
725
726 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
727 {
728 __be32 *p = xdr_reserve_space(xdr, nbytes);
729 BUG_ON(!p);
730 return p;
731 }
732
733 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
734 {
735 __be32 *p;
736
737 p = xdr_reserve_space(xdr, 4 + len);
738 BUG_ON(p == NULL);
739 xdr_encode_opaque(p, str, len);
740 }
741
742 static void encode_compound_hdr(struct xdr_stream *xdr,
743 struct rpc_rqst *req,
744 struct compound_hdr *hdr)
745 {
746 __be32 *p;
747 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
748
749 /* initialize running count of expected bytes in reply.
750 * NOTE: the replied tag SHOULD be the same is the one sent,
751 * but this is not required as a MUST for the server to do so. */
752 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
753
754 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
755 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
756 p = reserve_space(xdr, 4 + hdr->taglen + 8);
757 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
758 *p++ = cpu_to_be32(hdr->minorversion);
759 hdr->nops_p = p;
760 *p = cpu_to_be32(hdr->nops);
761 }
762
763 static void encode_nops(struct compound_hdr *hdr)
764 {
765 BUG_ON(hdr->nops > NFS4_MAX_OPS);
766 *hdr->nops_p = htonl(hdr->nops);
767 }
768
769 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
770 {
771 __be32 *p;
772
773 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
774 BUG_ON(p == NULL);
775 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
776 }
777
778 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
779 {
780 char owner_name[IDMAP_NAMESZ];
781 char owner_group[IDMAP_NAMESZ];
782 int owner_namelen = 0;
783 int owner_grouplen = 0;
784 __be32 *p;
785 __be32 *q;
786 int len;
787 uint32_t bmval0 = 0;
788 uint32_t bmval1 = 0;
789
790 /*
791 * We reserve enough space to write the entire attribute buffer at once.
792 * In the worst-case, this would be
793 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
794 * = 36 bytes, plus any contribution from variable-length fields
795 * such as owner/group.
796 */
797 len = 16;
798
799 /* Sigh */
800 if (iap->ia_valid & ATTR_SIZE)
801 len += 8;
802 if (iap->ia_valid & ATTR_MODE)
803 len += 4;
804 if (iap->ia_valid & ATTR_UID) {
805 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
806 if (owner_namelen < 0) {
807 dprintk("nfs: couldn't resolve uid %d to string\n",
808 iap->ia_uid);
809 /* XXX */
810 strcpy(owner_name, "nobody");
811 owner_namelen = sizeof("nobody") - 1;
812 /* goto out; */
813 }
814 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
815 }
816 if (iap->ia_valid & ATTR_GID) {
817 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
818 if (owner_grouplen < 0) {
819 dprintk("nfs: couldn't resolve gid %d to string\n",
820 iap->ia_gid);
821 strcpy(owner_group, "nobody");
822 owner_grouplen = sizeof("nobody") - 1;
823 /* goto out; */
824 }
825 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
826 }
827 if (iap->ia_valid & ATTR_ATIME_SET)
828 len += 16;
829 else if (iap->ia_valid & ATTR_ATIME)
830 len += 4;
831 if (iap->ia_valid & ATTR_MTIME_SET)
832 len += 16;
833 else if (iap->ia_valid & ATTR_MTIME)
834 len += 4;
835 p = reserve_space(xdr, len);
836
837 /*
838 * We write the bitmap length now, but leave the bitmap and the attribute
839 * buffer length to be backfilled at the end of this routine.
840 */
841 *p++ = cpu_to_be32(2);
842 q = p;
843 p += 3;
844
845 if (iap->ia_valid & ATTR_SIZE) {
846 bmval0 |= FATTR4_WORD0_SIZE;
847 p = xdr_encode_hyper(p, iap->ia_size);
848 }
849 if (iap->ia_valid & ATTR_MODE) {
850 bmval1 |= FATTR4_WORD1_MODE;
851 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
852 }
853 if (iap->ia_valid & ATTR_UID) {
854 bmval1 |= FATTR4_WORD1_OWNER;
855 p = xdr_encode_opaque(p, owner_name, owner_namelen);
856 }
857 if (iap->ia_valid & ATTR_GID) {
858 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
859 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
860 }
861 if (iap->ia_valid & ATTR_ATIME_SET) {
862 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
863 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
864 *p++ = cpu_to_be32(0);
865 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
866 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
867 }
868 else if (iap->ia_valid & ATTR_ATIME) {
869 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
870 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
871 }
872 if (iap->ia_valid & ATTR_MTIME_SET) {
873 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
874 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
875 *p++ = cpu_to_be32(0);
876 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
877 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
878 }
879 else if (iap->ia_valid & ATTR_MTIME) {
880 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
881 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
882 }
883
884 /*
885 * Now we backfill the bitmap and the attribute buffer length.
886 */
887 if (len != ((char *)p - (char *)q) + 4) {
888 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
889 len, ((char *)p - (char *)q) + 4);
890 BUG();
891 }
892 len = (char *)p - (char *)q - 12;
893 *q++ = htonl(bmval0);
894 *q++ = htonl(bmval1);
895 *q = htonl(len);
896
897 /* out: */
898 }
899
900 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
901 {
902 __be32 *p;
903
904 p = reserve_space(xdr, 8);
905 *p++ = cpu_to_be32(OP_ACCESS);
906 *p = cpu_to_be32(access);
907 hdr->nops++;
908 hdr->replen += decode_access_maxsz;
909 }
910
911 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
912 {
913 __be32 *p;
914
915 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
916 *p++ = cpu_to_be32(OP_CLOSE);
917 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
918 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
919 hdr->nops++;
920 hdr->replen += decode_close_maxsz;
921 }
922
923 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
924 {
925 __be32 *p;
926
927 p = reserve_space(xdr, 16);
928 *p++ = cpu_to_be32(OP_COMMIT);
929 p = xdr_encode_hyper(p, args->offset);
930 *p = cpu_to_be32(args->count);
931 hdr->nops++;
932 hdr->replen += decode_commit_maxsz;
933 }
934
935 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
936 {
937 __be32 *p;
938
939 p = reserve_space(xdr, 8);
940 *p++ = cpu_to_be32(OP_CREATE);
941 *p = cpu_to_be32(create->ftype);
942
943 switch (create->ftype) {
944 case NF4LNK:
945 p = reserve_space(xdr, 4);
946 *p = cpu_to_be32(create->u.symlink.len);
947 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
948 break;
949
950 case NF4BLK: case NF4CHR:
951 p = reserve_space(xdr, 8);
952 *p++ = cpu_to_be32(create->u.device.specdata1);
953 *p = cpu_to_be32(create->u.device.specdata2);
954 break;
955
956 default:
957 break;
958 }
959
960 encode_string(xdr, create->name->len, create->name->name);
961 hdr->nops++;
962 hdr->replen += decode_create_maxsz;
963
964 encode_attrs(xdr, create->attrs, create->server);
965 }
966
967 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
968 {
969 __be32 *p;
970
971 p = reserve_space(xdr, 12);
972 *p++ = cpu_to_be32(OP_GETATTR);
973 *p++ = cpu_to_be32(1);
974 *p = cpu_to_be32(bitmap);
975 hdr->nops++;
976 hdr->replen += decode_getattr_maxsz;
977 }
978
979 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
980 {
981 __be32 *p;
982
983 p = reserve_space(xdr, 16);
984 *p++ = cpu_to_be32(OP_GETATTR);
985 *p++ = cpu_to_be32(2);
986 *p++ = cpu_to_be32(bm0);
987 *p = cpu_to_be32(bm1);
988 hdr->nops++;
989 hdr->replen += decode_getattr_maxsz;
990 }
991
992 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
993 {
994 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
995 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
996 }
997
998 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
999 {
1000 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1001 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1002 }
1003
1004 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1005 {
1006 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1007 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1008 }
1009
1010 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1011 {
1012 __be32 *p;
1013
1014 p = reserve_space(xdr, 4);
1015 *p = cpu_to_be32(OP_GETFH);
1016 hdr->nops++;
1017 hdr->replen += decode_getfh_maxsz;
1018 }
1019
1020 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1021 {
1022 __be32 *p;
1023
1024 p = reserve_space(xdr, 8 + name->len);
1025 *p++ = cpu_to_be32(OP_LINK);
1026 xdr_encode_opaque(p, name->name, name->len);
1027 hdr->nops++;
1028 hdr->replen += decode_link_maxsz;
1029 }
1030
1031 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1032 {
1033 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1034 return block ? NFS4_READW_LT : NFS4_READ_LT;
1035 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1036 }
1037
1038 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1039 {
1040 if (fl->fl_end == OFFSET_MAX)
1041 return ~(uint64_t)0;
1042 return fl->fl_end - fl->fl_start + 1;
1043 }
1044
1045 /*
1046 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1047 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1048 */
1049 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1050 {
1051 __be32 *p;
1052
1053 p = reserve_space(xdr, 32);
1054 *p++ = cpu_to_be32(OP_LOCK);
1055 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1056 *p++ = cpu_to_be32(args->reclaim);
1057 p = xdr_encode_hyper(p, args->fl->fl_start);
1058 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1059 *p = cpu_to_be32(args->new_lock_owner);
1060 if (args->new_lock_owner){
1061 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1062 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1063 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1064 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1065 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1066 *p++ = cpu_to_be32(16);
1067 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1068 xdr_encode_hyper(p, args->lock_owner.id);
1069 }
1070 else {
1071 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1072 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1073 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1074 }
1075 hdr->nops++;
1076 hdr->replen += decode_lock_maxsz;
1077 }
1078
1079 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1080 {
1081 __be32 *p;
1082
1083 p = reserve_space(xdr, 52);
1084 *p++ = cpu_to_be32(OP_LOCKT);
1085 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1086 p = xdr_encode_hyper(p, args->fl->fl_start);
1087 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1088 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1089 *p++ = cpu_to_be32(16);
1090 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1091 xdr_encode_hyper(p, args->lock_owner.id);
1092 hdr->nops++;
1093 hdr->replen += decode_lockt_maxsz;
1094 }
1095
1096 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1097 {
1098 __be32 *p;
1099
1100 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1101 *p++ = cpu_to_be32(OP_LOCKU);
1102 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1103 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1104 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1105 p = xdr_encode_hyper(p, args->fl->fl_start);
1106 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1107 hdr->nops++;
1108 hdr->replen += decode_locku_maxsz;
1109 }
1110
1111 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1112 {
1113 int len = name->len;
1114 __be32 *p;
1115
1116 p = reserve_space(xdr, 8 + len);
1117 *p++ = cpu_to_be32(OP_LOOKUP);
1118 xdr_encode_opaque(p, name->name, len);
1119 hdr->nops++;
1120 hdr->replen += decode_lookup_maxsz;
1121 }
1122
1123 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1124 {
1125 __be32 *p;
1126
1127 p = reserve_space(xdr, 8);
1128 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1129 case FMODE_READ:
1130 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1131 break;
1132 case FMODE_WRITE:
1133 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1137 break;
1138 default:
1139 *p++ = cpu_to_be32(0);
1140 }
1141 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1142 }
1143
1144 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1145 {
1146 __be32 *p;
1147 /*
1148 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1149 * owner 4 = 32
1150 */
1151 p = reserve_space(xdr, 8);
1152 *p++ = cpu_to_be32(OP_OPEN);
1153 *p = cpu_to_be32(arg->seqid->sequence->counter);
1154 encode_share_access(xdr, arg->fmode);
1155 p = reserve_space(xdr, 28);
1156 p = xdr_encode_hyper(p, arg->clientid);
1157 *p++ = cpu_to_be32(16);
1158 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1159 xdr_encode_hyper(p, arg->id);
1160 }
1161
1162 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1163 {
1164 __be32 *p;
1165 struct nfs_client *clp;
1166
1167 p = reserve_space(xdr, 4);
1168 switch(arg->open_flags & O_EXCL) {
1169 case 0:
1170 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1171 encode_attrs(xdr, arg->u.attrs, arg->server);
1172 break;
1173 default:
1174 clp = arg->server->nfs_client;
1175 if (clp->cl_minorversion > 0) {
1176 if (nfs4_has_persistent_session(clp)) {
1177 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1178 encode_attrs(xdr, arg->u.attrs, arg->server);
1179 } else {
1180 struct iattr dummy;
1181
1182 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1183 encode_nfs4_verifier(xdr, &arg->u.verifier);
1184 dummy.ia_valid = 0;
1185 encode_attrs(xdr, &dummy, arg->server);
1186 }
1187 } else {
1188 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1189 encode_nfs4_verifier(xdr, &arg->u.verifier);
1190 }
1191 }
1192 }
1193
1194 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1195 {
1196 __be32 *p;
1197
1198 p = reserve_space(xdr, 4);
1199 switch (arg->open_flags & O_CREAT) {
1200 case 0:
1201 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1202 break;
1203 default:
1204 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1205 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1206 encode_createmode(xdr, arg);
1207 }
1208 }
1209
1210 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1211 {
1212 __be32 *p;
1213
1214 p = reserve_space(xdr, 4);
1215 switch (delegation_type) {
1216 case 0:
1217 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1218 break;
1219 case FMODE_READ:
1220 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1221 break;
1222 case FMODE_WRITE|FMODE_READ:
1223 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1224 break;
1225 default:
1226 BUG();
1227 }
1228 }
1229
1230 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1231 {
1232 __be32 *p;
1233
1234 p = reserve_space(xdr, 4);
1235 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1236 encode_string(xdr, name->len, name->name);
1237 }
1238
1239 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1240 {
1241 __be32 *p;
1242
1243 p = reserve_space(xdr, 4);
1244 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1245 encode_delegation_type(xdr, type);
1246 }
1247
1248 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1249 {
1250 __be32 *p;
1251
1252 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1253 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1254 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1255 encode_string(xdr, name->len, name->name);
1256 }
1257
1258 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1259 {
1260 encode_openhdr(xdr, arg);
1261 encode_opentype(xdr, arg);
1262 switch (arg->claim) {
1263 case NFS4_OPEN_CLAIM_NULL:
1264 encode_claim_null(xdr, arg->name);
1265 break;
1266 case NFS4_OPEN_CLAIM_PREVIOUS:
1267 encode_claim_previous(xdr, arg->u.delegation_type);
1268 break;
1269 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1270 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1271 break;
1272 default:
1273 BUG();
1274 }
1275 hdr->nops++;
1276 hdr->replen += decode_open_maxsz;
1277 }
1278
1279 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1280 {
1281 __be32 *p;
1282
1283 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1284 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1285 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1286 *p = cpu_to_be32(arg->seqid->sequence->counter);
1287 hdr->nops++;
1288 hdr->replen += decode_open_confirm_maxsz;
1289 }
1290
1291 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1292 {
1293 __be32 *p;
1294
1295 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1296 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1297 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1298 *p = cpu_to_be32(arg->seqid->sequence->counter);
1299 encode_share_access(xdr, arg->fmode);
1300 hdr->nops++;
1301 hdr->replen += decode_open_downgrade_maxsz;
1302 }
1303
1304 static void
1305 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1306 {
1307 int len = fh->size;
1308 __be32 *p;
1309
1310 p = reserve_space(xdr, 8 + len);
1311 *p++ = cpu_to_be32(OP_PUTFH);
1312 xdr_encode_opaque(p, fh->data, len);
1313 hdr->nops++;
1314 hdr->replen += decode_putfh_maxsz;
1315 }
1316
1317 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1318 {
1319 __be32 *p;
1320
1321 p = reserve_space(xdr, 4);
1322 *p = cpu_to_be32(OP_PUTROOTFH);
1323 hdr->nops++;
1324 hdr->replen += decode_putrootfh_maxsz;
1325 }
1326
1327 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1328 {
1329 nfs4_stateid stateid;
1330 __be32 *p;
1331
1332 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1333 if (ctx->state != NULL) {
1334 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1335 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1336 } else
1337 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1338 }
1339
1340 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1341 {
1342 __be32 *p;
1343
1344 p = reserve_space(xdr, 4);
1345 *p = cpu_to_be32(OP_READ);
1346
1347 encode_stateid(xdr, args->context);
1348
1349 p = reserve_space(xdr, 12);
1350 p = xdr_encode_hyper(p, args->offset);
1351 *p = cpu_to_be32(args->count);
1352 hdr->nops++;
1353 hdr->replen += decode_read_maxsz;
1354 }
1355
1356 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1357 {
1358 uint32_t attrs[2] = {
1359 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1360 FATTR4_WORD1_MOUNTED_ON_FILEID,
1361 };
1362 __be32 *p;
1363
1364 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1365 *p++ = cpu_to_be32(OP_READDIR);
1366 p = xdr_encode_hyper(p, readdir->cookie);
1367 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1368 *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
1369 *p++ = cpu_to_be32(readdir->count);
1370 *p++ = cpu_to_be32(2);
1371 /* Switch to mounted_on_fileid if the server supports it */
1372 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1373 attrs[0] &= ~FATTR4_WORD0_FILEID;
1374 else
1375 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1376 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1377 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1378 hdr->nops++;
1379 hdr->replen += decode_readdir_maxsz;
1380 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1381 __func__,
1382 (unsigned long long)readdir->cookie,
1383 ((u32 *)readdir->verifier.data)[0],
1384 ((u32 *)readdir->verifier.data)[1],
1385 attrs[0] & readdir->bitmask[0],
1386 attrs[1] & readdir->bitmask[1]);
1387 }
1388
1389 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1390 {
1391 __be32 *p;
1392
1393 p = reserve_space(xdr, 4);
1394 *p = cpu_to_be32(OP_READLINK);
1395 hdr->nops++;
1396 hdr->replen += decode_readlink_maxsz;
1397 }
1398
1399 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1400 {
1401 __be32 *p;
1402
1403 p = reserve_space(xdr, 8 + name->len);
1404 *p++ = cpu_to_be32(OP_REMOVE);
1405 xdr_encode_opaque(p, name->name, name->len);
1406 hdr->nops++;
1407 hdr->replen += decode_remove_maxsz;
1408 }
1409
1410 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1411 {
1412 __be32 *p;
1413
1414 p = reserve_space(xdr, 4);
1415 *p = cpu_to_be32(OP_RENAME);
1416 encode_string(xdr, oldname->len, oldname->name);
1417 encode_string(xdr, newname->len, newname->name);
1418 hdr->nops++;
1419 hdr->replen += decode_rename_maxsz;
1420 }
1421
1422 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1423 {
1424 __be32 *p;
1425
1426 p = reserve_space(xdr, 12);
1427 *p++ = cpu_to_be32(OP_RENEW);
1428 xdr_encode_hyper(p, client_stateid->cl_clientid);
1429 hdr->nops++;
1430 hdr->replen += decode_renew_maxsz;
1431 }
1432
1433 static void
1434 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1435 {
1436 __be32 *p;
1437
1438 p = reserve_space(xdr, 4);
1439 *p = cpu_to_be32(OP_RESTOREFH);
1440 hdr->nops++;
1441 hdr->replen += decode_restorefh_maxsz;
1442 }
1443
1444 static int
1445 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1446 {
1447 __be32 *p;
1448
1449 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1450 *p++ = cpu_to_be32(OP_SETATTR);
1451 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1452 p = reserve_space(xdr, 2*4);
1453 *p++ = cpu_to_be32(1);
1454 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1455 if (arg->acl_len % 4)
1456 return -EINVAL;
1457 p = reserve_space(xdr, 4);
1458 *p = cpu_to_be32(arg->acl_len);
1459 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1460 hdr->nops++;
1461 hdr->replen += decode_setacl_maxsz;
1462 return 0;
1463 }
1464
1465 static void
1466 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1467 {
1468 __be32 *p;
1469
1470 p = reserve_space(xdr, 4);
1471 *p = cpu_to_be32(OP_SAVEFH);
1472 hdr->nops++;
1473 hdr->replen += decode_savefh_maxsz;
1474 }
1475
1476 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1477 {
1478 __be32 *p;
1479
1480 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1481 *p++ = cpu_to_be32(OP_SETATTR);
1482 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1483 hdr->nops++;
1484 hdr->replen += decode_setattr_maxsz;
1485 encode_attrs(xdr, arg->iap, server);
1486 }
1487
1488 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1489 {
1490 __be32 *p;
1491
1492 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1493 *p++ = cpu_to_be32(OP_SETCLIENTID);
1494 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1495
1496 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1497 p = reserve_space(xdr, 4);
1498 *p = cpu_to_be32(setclientid->sc_prog);
1499 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1500 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(setclientid->sc_cb_ident);
1503 hdr->nops++;
1504 hdr->replen += decode_setclientid_maxsz;
1505 }
1506
1507 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1508 {
1509 __be32 *p;
1510
1511 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1512 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1513 p = xdr_encode_hyper(p, client_state->cl_clientid);
1514 xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1515 hdr->nops++;
1516 hdr->replen += decode_setclientid_confirm_maxsz;
1517 }
1518
1519 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1520 {
1521 __be32 *p;
1522
1523 p = reserve_space(xdr, 4);
1524 *p = cpu_to_be32(OP_WRITE);
1525
1526 encode_stateid(xdr, args->context);
1527
1528 p = reserve_space(xdr, 16);
1529 p = xdr_encode_hyper(p, args->offset);
1530 *p++ = cpu_to_be32(args->stable);
1531 *p = cpu_to_be32(args->count);
1532
1533 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1534 hdr->nops++;
1535 hdr->replen += decode_write_maxsz;
1536 }
1537
1538 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1539 {
1540 __be32 *p;
1541
1542 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1543
1544 *p++ = cpu_to_be32(OP_DELEGRETURN);
1545 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1546 hdr->nops++;
1547 hdr->replen += decode_delegreturn_maxsz;
1548 }
1549
1550 #if defined(CONFIG_NFS_V4_1)
1551 /* NFSv4.1 operations */
1552 static void encode_exchange_id(struct xdr_stream *xdr,
1553 struct nfs41_exchange_id_args *args,
1554 struct compound_hdr *hdr)
1555 {
1556 __be32 *p;
1557
1558 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1559 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1560 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1561
1562 encode_string(xdr, args->id_len, args->id);
1563
1564 p = reserve_space(xdr, 12);
1565 *p++ = cpu_to_be32(args->flags);
1566 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1567 *p = cpu_to_be32(0); /* zero length implementation id array */
1568 hdr->nops++;
1569 hdr->replen += decode_exchange_id_maxsz;
1570 }
1571
1572 static void encode_create_session(struct xdr_stream *xdr,
1573 struct nfs41_create_session_args *args,
1574 struct compound_hdr *hdr)
1575 {
1576 __be32 *p;
1577 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1578 uint32_t len;
1579 struct nfs_client *clp = args->client;
1580 u32 max_resp_sz_cached;
1581
1582 /*
1583 * Assumes OPEN is the biggest non-idempotent compound.
1584 * 2 is the verifier.
1585 */
1586 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1587 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1588
1589 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1590 clp->cl_ipaddr);
1591
1592 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1593 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1594 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1595 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1596 *p++ = cpu_to_be32(args->flags); /*flags */
1597
1598 /* Fore Channel */
1599 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1600 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1601 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1602 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1603 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1604 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1605 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1606
1607 /* Back Channel */
1608 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1609 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1610 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1611 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1612 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1613 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1614 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1615
1616 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1617 *p++ = cpu_to_be32(1);
1618 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1619
1620 /* authsys_parms rfc1831 */
1621 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1622 p = xdr_encode_opaque(p, machine_name, len);
1623 *p++ = cpu_to_be32(0); /* UID */
1624 *p++ = cpu_to_be32(0); /* GID */
1625 *p = cpu_to_be32(0); /* No more gids */
1626 hdr->nops++;
1627 hdr->replen += decode_create_session_maxsz;
1628 }
1629
1630 static void encode_destroy_session(struct xdr_stream *xdr,
1631 struct nfs4_session *session,
1632 struct compound_hdr *hdr)
1633 {
1634 __be32 *p;
1635 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1636 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1637 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1638 hdr->nops++;
1639 hdr->replen += decode_destroy_session_maxsz;
1640 }
1641
1642 static void encode_reclaim_complete(struct xdr_stream *xdr,
1643 struct nfs41_reclaim_complete_args *args,
1644 struct compound_hdr *hdr)
1645 {
1646 __be32 *p;
1647
1648 p = reserve_space(xdr, 8);
1649 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1650 *p++ = cpu_to_be32(args->one_fs);
1651 hdr->nops++;
1652 hdr->replen += decode_reclaim_complete_maxsz;
1653 }
1654 #endif /* CONFIG_NFS_V4_1 */
1655
1656 static void encode_sequence(struct xdr_stream *xdr,
1657 const struct nfs4_sequence_args *args,
1658 struct compound_hdr *hdr)
1659 {
1660 #if defined(CONFIG_NFS_V4_1)
1661 struct nfs4_session *session = args->sa_session;
1662 struct nfs4_slot_table *tp;
1663 struct nfs4_slot *slot;
1664 __be32 *p;
1665
1666 if (!session)
1667 return;
1668
1669 tp = &session->fc_slot_table;
1670
1671 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1672 slot = tp->slots + args->sa_slotid;
1673
1674 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1675 *p++ = cpu_to_be32(OP_SEQUENCE);
1676
1677 /*
1678 * Sessionid + seqid + slotid + max slotid + cache_this
1679 */
1680 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1681 "max_slotid=%d cache_this=%d\n",
1682 __func__,
1683 ((u32 *)session->sess_id.data)[0],
1684 ((u32 *)session->sess_id.data)[1],
1685 ((u32 *)session->sess_id.data)[2],
1686 ((u32 *)session->sess_id.data)[3],
1687 slot->seq_nr, args->sa_slotid,
1688 tp->highest_used_slotid, args->sa_cache_this);
1689 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1690 *p++ = cpu_to_be32(slot->seq_nr);
1691 *p++ = cpu_to_be32(args->sa_slotid);
1692 *p++ = cpu_to_be32(tp->highest_used_slotid);
1693 *p = cpu_to_be32(args->sa_cache_this);
1694 hdr->nops++;
1695 hdr->replen += decode_sequence_maxsz;
1696 #endif /* CONFIG_NFS_V4_1 */
1697 }
1698
1699 /*
1700 * END OF "GENERIC" ENCODE ROUTINES.
1701 */
1702
1703 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1704 {
1705 #if defined(CONFIG_NFS_V4_1)
1706 if (args->sa_session)
1707 return args->sa_session->clp->cl_minorversion;
1708 #endif /* CONFIG_NFS_V4_1 */
1709 return 0;
1710 }
1711
1712 /*
1713 * Encode an ACCESS request
1714 */
1715 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1716 {
1717 struct xdr_stream xdr;
1718 struct compound_hdr hdr = {
1719 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1720 };
1721
1722 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1723 encode_compound_hdr(&xdr, req, &hdr);
1724 encode_sequence(&xdr, &args->seq_args, &hdr);
1725 encode_putfh(&xdr, args->fh, &hdr);
1726 encode_access(&xdr, args->access, &hdr);
1727 encode_getfattr(&xdr, args->bitmask, &hdr);
1728 encode_nops(&hdr);
1729 return 0;
1730 }
1731
1732 /*
1733 * Encode LOOKUP request
1734 */
1735 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1736 {
1737 struct xdr_stream xdr;
1738 struct compound_hdr hdr = {
1739 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1740 };
1741
1742 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743 encode_compound_hdr(&xdr, req, &hdr);
1744 encode_sequence(&xdr, &args->seq_args, &hdr);
1745 encode_putfh(&xdr, args->dir_fh, &hdr);
1746 encode_lookup(&xdr, args->name, &hdr);
1747 encode_getfh(&xdr, &hdr);
1748 encode_getfattr(&xdr, args->bitmask, &hdr);
1749 encode_nops(&hdr);
1750 return 0;
1751 }
1752
1753 /*
1754 * Encode LOOKUP_ROOT request
1755 */
1756 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1757 {
1758 struct xdr_stream xdr;
1759 struct compound_hdr hdr = {
1760 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1761 };
1762
1763 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1764 encode_compound_hdr(&xdr, req, &hdr);
1765 encode_sequence(&xdr, &args->seq_args, &hdr);
1766 encode_putrootfh(&xdr, &hdr);
1767 encode_getfh(&xdr, &hdr);
1768 encode_getfattr(&xdr, args->bitmask, &hdr);
1769 encode_nops(&hdr);
1770 return 0;
1771 }
1772
1773 /*
1774 * Encode REMOVE request
1775 */
1776 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1777 {
1778 struct xdr_stream xdr;
1779 struct compound_hdr hdr = {
1780 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1781 };
1782
1783 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1784 encode_compound_hdr(&xdr, req, &hdr);
1785 encode_sequence(&xdr, &args->seq_args, &hdr);
1786 encode_putfh(&xdr, args->fh, &hdr);
1787 encode_remove(&xdr, &args->name, &hdr);
1788 encode_getfattr(&xdr, args->bitmask, &hdr);
1789 encode_nops(&hdr);
1790 return 0;
1791 }
1792
1793 /*
1794 * Encode RENAME request
1795 */
1796 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1797 {
1798 struct xdr_stream xdr;
1799 struct compound_hdr hdr = {
1800 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1801 };
1802
1803 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1804 encode_compound_hdr(&xdr, req, &hdr);
1805 encode_sequence(&xdr, &args->seq_args, &hdr);
1806 encode_putfh(&xdr, args->old_dir, &hdr);
1807 encode_savefh(&xdr, &hdr);
1808 encode_putfh(&xdr, args->new_dir, &hdr);
1809 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1810 encode_getfattr(&xdr, args->bitmask, &hdr);
1811 encode_restorefh(&xdr, &hdr);
1812 encode_getfattr(&xdr, args->bitmask, &hdr);
1813 encode_nops(&hdr);
1814 return 0;
1815 }
1816
1817 /*
1818 * Encode LINK request
1819 */
1820 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1821 {
1822 struct xdr_stream xdr;
1823 struct compound_hdr hdr = {
1824 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1825 };
1826
1827 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1828 encode_compound_hdr(&xdr, req, &hdr);
1829 encode_sequence(&xdr, &args->seq_args, &hdr);
1830 encode_putfh(&xdr, args->fh, &hdr);
1831 encode_savefh(&xdr, &hdr);
1832 encode_putfh(&xdr, args->dir_fh, &hdr);
1833 encode_link(&xdr, args->name, &hdr);
1834 encode_getfattr(&xdr, args->bitmask, &hdr);
1835 encode_restorefh(&xdr, &hdr);
1836 encode_getfattr(&xdr, args->bitmask, &hdr);
1837 encode_nops(&hdr);
1838 return 0;
1839 }
1840
1841 /*
1842 * Encode CREATE request
1843 */
1844 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1845 {
1846 struct xdr_stream xdr;
1847 struct compound_hdr hdr = {
1848 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1849 };
1850
1851 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1852 encode_compound_hdr(&xdr, req, &hdr);
1853 encode_sequence(&xdr, &args->seq_args, &hdr);
1854 encode_putfh(&xdr, args->dir_fh, &hdr);
1855 encode_savefh(&xdr, &hdr);
1856 encode_create(&xdr, args, &hdr);
1857 encode_getfh(&xdr, &hdr);
1858 encode_getfattr(&xdr, args->bitmask, &hdr);
1859 encode_restorefh(&xdr, &hdr);
1860 encode_getfattr(&xdr, args->bitmask, &hdr);
1861 encode_nops(&hdr);
1862 return 0;
1863 }
1864
1865 /*
1866 * Encode SYMLINK request
1867 */
1868 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1869 {
1870 return nfs4_xdr_enc_create(req, p, args);
1871 }
1872
1873 /*
1874 * Encode GETATTR request
1875 */
1876 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1877 {
1878 struct xdr_stream xdr;
1879 struct compound_hdr hdr = {
1880 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1881 };
1882
1883 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1884 encode_compound_hdr(&xdr, req, &hdr);
1885 encode_sequence(&xdr, &args->seq_args, &hdr);
1886 encode_putfh(&xdr, args->fh, &hdr);
1887 encode_getfattr(&xdr, args->bitmask, &hdr);
1888 encode_nops(&hdr);
1889 return 0;
1890 }
1891
1892 /*
1893 * Encode a CLOSE request
1894 */
1895 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1896 {
1897 struct xdr_stream xdr;
1898 struct compound_hdr hdr = {
1899 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1900 };
1901
1902 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1903 encode_compound_hdr(&xdr, req, &hdr);
1904 encode_sequence(&xdr, &args->seq_args, &hdr);
1905 encode_putfh(&xdr, args->fh, &hdr);
1906 encode_close(&xdr, args, &hdr);
1907 encode_getfattr(&xdr, args->bitmask, &hdr);
1908 encode_nops(&hdr);
1909 return 0;
1910 }
1911
1912 /*
1913 * Encode an OPEN request
1914 */
1915 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1916 {
1917 struct xdr_stream xdr;
1918 struct compound_hdr hdr = {
1919 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1920 };
1921
1922 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1923 encode_compound_hdr(&xdr, req, &hdr);
1924 encode_sequence(&xdr, &args->seq_args, &hdr);
1925 encode_putfh(&xdr, args->fh, &hdr);
1926 encode_savefh(&xdr, &hdr);
1927 encode_open(&xdr, args, &hdr);
1928 encode_getfh(&xdr, &hdr);
1929 encode_getfattr(&xdr, args->bitmask, &hdr);
1930 encode_restorefh(&xdr, &hdr);
1931 encode_getfattr(&xdr, args->bitmask, &hdr);
1932 encode_nops(&hdr);
1933 return 0;
1934 }
1935
1936 /*
1937 * Encode an OPEN_CONFIRM request
1938 */
1939 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1940 {
1941 struct xdr_stream xdr;
1942 struct compound_hdr hdr = {
1943 .nops = 0,
1944 };
1945
1946 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1947 encode_compound_hdr(&xdr, req, &hdr);
1948 encode_putfh(&xdr, args->fh, &hdr);
1949 encode_open_confirm(&xdr, args, &hdr);
1950 encode_nops(&hdr);
1951 return 0;
1952 }
1953
1954 /*
1955 * Encode an OPEN request with no attributes.
1956 */
1957 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1958 {
1959 struct xdr_stream xdr;
1960 struct compound_hdr hdr = {
1961 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1962 };
1963
1964 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1965 encode_compound_hdr(&xdr, req, &hdr);
1966 encode_sequence(&xdr, &args->seq_args, &hdr);
1967 encode_putfh(&xdr, args->fh, &hdr);
1968 encode_open(&xdr, args, &hdr);
1969 encode_getfattr(&xdr, args->bitmask, &hdr);
1970 encode_nops(&hdr);
1971 return 0;
1972 }
1973
1974 /*
1975 * Encode an OPEN_DOWNGRADE request
1976 */
1977 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *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_open_downgrade(&xdr, args, &hdr);
1989 encode_getfattr(&xdr, args->bitmask, &hdr);
1990 encode_nops(&hdr);
1991 return 0;
1992 }
1993
1994 /*
1995 * Encode a LOCK request
1996 */
1997 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1998 {
1999 struct xdr_stream xdr;
2000 struct compound_hdr hdr = {
2001 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2002 };
2003
2004 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2005 encode_compound_hdr(&xdr, req, &hdr);
2006 encode_sequence(&xdr, &args->seq_args, &hdr);
2007 encode_putfh(&xdr, args->fh, &hdr);
2008 encode_lock(&xdr, args, &hdr);
2009 encode_nops(&hdr);
2010 return 0;
2011 }
2012
2013 /*
2014 * Encode a LOCKT request
2015 */
2016 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2017 {
2018 struct xdr_stream xdr;
2019 struct compound_hdr hdr = {
2020 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2021 };
2022
2023 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2024 encode_compound_hdr(&xdr, req, &hdr);
2025 encode_sequence(&xdr, &args->seq_args, &hdr);
2026 encode_putfh(&xdr, args->fh, &hdr);
2027 encode_lockt(&xdr, args, &hdr);
2028 encode_nops(&hdr);
2029 return 0;
2030 }
2031
2032 /*
2033 * Encode a LOCKU request
2034 */
2035 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2036 {
2037 struct xdr_stream xdr;
2038 struct compound_hdr hdr = {
2039 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2040 };
2041
2042 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2043 encode_compound_hdr(&xdr, req, &hdr);
2044 encode_sequence(&xdr, &args->seq_args, &hdr);
2045 encode_putfh(&xdr, args->fh, &hdr);
2046 encode_locku(&xdr, args, &hdr);
2047 encode_nops(&hdr);
2048 return 0;
2049 }
2050
2051 /*
2052 * Encode a READLINK request
2053 */
2054 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2055 {
2056 struct xdr_stream xdr;
2057 struct compound_hdr hdr = {
2058 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2059 };
2060
2061 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2062 encode_compound_hdr(&xdr, req, &hdr);
2063 encode_sequence(&xdr, &args->seq_args, &hdr);
2064 encode_putfh(&xdr, args->fh, &hdr);
2065 encode_readlink(&xdr, args, req, &hdr);
2066
2067 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2068 args->pgbase, args->pglen);
2069 encode_nops(&hdr);
2070 return 0;
2071 }
2072
2073 /*
2074 * Encode a READDIR request
2075 */
2076 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2077 {
2078 struct xdr_stream xdr;
2079 struct compound_hdr hdr = {
2080 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081 };
2082
2083 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084 encode_compound_hdr(&xdr, req, &hdr);
2085 encode_sequence(&xdr, &args->seq_args, &hdr);
2086 encode_putfh(&xdr, args->fh, &hdr);
2087 encode_readdir(&xdr, args, req, &hdr);
2088
2089 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2090 args->pgbase, args->count);
2091 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2092 __func__, hdr.replen << 2, args->pages,
2093 args->pgbase, args->count);
2094 encode_nops(&hdr);
2095 return 0;
2096 }
2097
2098 /*
2099 * Encode a READ request
2100 */
2101 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2102 {
2103 struct xdr_stream xdr;
2104 struct compound_hdr hdr = {
2105 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2106 };
2107
2108 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2109 encode_compound_hdr(&xdr, req, &hdr);
2110 encode_sequence(&xdr, &args->seq_args, &hdr);
2111 encode_putfh(&xdr, args->fh, &hdr);
2112 encode_read(&xdr, args, &hdr);
2113
2114 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2115 args->pages, args->pgbase, args->count);
2116 req->rq_rcv_buf.flags |= XDRBUF_READ;
2117 encode_nops(&hdr);
2118 return 0;
2119 }
2120
2121 /*
2122 * Encode an SETATTR request
2123 */
2124 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2125 {
2126 struct xdr_stream xdr;
2127 struct compound_hdr hdr = {
2128 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2129 };
2130
2131 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2132 encode_compound_hdr(&xdr, req, &hdr);
2133 encode_sequence(&xdr, &args->seq_args, &hdr);
2134 encode_putfh(&xdr, args->fh, &hdr);
2135 encode_setattr(&xdr, args, args->server, &hdr);
2136 encode_getfattr(&xdr, args->bitmask, &hdr);
2137 encode_nops(&hdr);
2138 return 0;
2139 }
2140
2141 /*
2142 * Encode a GETACL request
2143 */
2144 static int
2145 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2146 struct nfs_getaclargs *args)
2147 {
2148 struct xdr_stream xdr;
2149 struct compound_hdr hdr = {
2150 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2151 };
2152 uint32_t replen;
2153
2154 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2155 encode_compound_hdr(&xdr, req, &hdr);
2156 encode_sequence(&xdr, &args->seq_args, &hdr);
2157 encode_putfh(&xdr, args->fh, &hdr);
2158 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2159 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2160
2161 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2162 args->acl_pages, args->acl_pgbase, args->acl_len);
2163 encode_nops(&hdr);
2164 return 0;
2165 }
2166
2167 /*
2168 * Encode a WRITE request
2169 */
2170 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2171 {
2172 struct xdr_stream xdr;
2173 struct compound_hdr hdr = {
2174 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2175 };
2176
2177 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2178 encode_compound_hdr(&xdr, req, &hdr);
2179 encode_sequence(&xdr, &args->seq_args, &hdr);
2180 encode_putfh(&xdr, args->fh, &hdr);
2181 encode_write(&xdr, args, &hdr);
2182 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2183 encode_getfattr(&xdr, args->bitmask, &hdr);
2184 encode_nops(&hdr);
2185 return 0;
2186 }
2187
2188 /*
2189 * a COMMIT request
2190 */
2191 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2192 {
2193 struct xdr_stream xdr;
2194 struct compound_hdr hdr = {
2195 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196 };
2197
2198 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2199 encode_compound_hdr(&xdr, req, &hdr);
2200 encode_sequence(&xdr, &args->seq_args, &hdr);
2201 encode_putfh(&xdr, args->fh, &hdr);
2202 encode_commit(&xdr, args, &hdr);
2203 encode_getfattr(&xdr, args->bitmask, &hdr);
2204 encode_nops(&hdr);
2205 return 0;
2206 }
2207
2208 /*
2209 * FSINFO request
2210 */
2211 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2212 {
2213 struct xdr_stream xdr;
2214 struct compound_hdr hdr = {
2215 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2216 };
2217
2218 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2219 encode_compound_hdr(&xdr, req, &hdr);
2220 encode_sequence(&xdr, &args->seq_args, &hdr);
2221 encode_putfh(&xdr, args->fh, &hdr);
2222 encode_fsinfo(&xdr, args->bitmask, &hdr);
2223 encode_nops(&hdr);
2224 return 0;
2225 }
2226
2227 /*
2228 * a PATHCONF request
2229 */
2230 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2231 {
2232 struct xdr_stream xdr;
2233 struct compound_hdr hdr = {
2234 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2235 };
2236
2237 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2238 encode_compound_hdr(&xdr, req, &hdr);
2239 encode_sequence(&xdr, &args->seq_args, &hdr);
2240 encode_putfh(&xdr, args->fh, &hdr);
2241 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2242 &hdr);
2243 encode_nops(&hdr);
2244 return 0;
2245 }
2246
2247 /*
2248 * a STATFS request
2249 */
2250 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2251 {
2252 struct xdr_stream xdr;
2253 struct compound_hdr hdr = {
2254 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2255 };
2256
2257 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2258 encode_compound_hdr(&xdr, req, &hdr);
2259 encode_sequence(&xdr, &args->seq_args, &hdr);
2260 encode_putfh(&xdr, args->fh, &hdr);
2261 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2262 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2263 encode_nops(&hdr);
2264 return 0;
2265 }
2266
2267 /*
2268 * GETATTR_BITMAP request
2269 */
2270 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2271 struct nfs4_server_caps_arg *args)
2272 {
2273 struct xdr_stream xdr;
2274 struct compound_hdr hdr = {
2275 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2276 };
2277
2278 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2279 encode_compound_hdr(&xdr, req, &hdr);
2280 encode_sequence(&xdr, &args->seq_args, &hdr);
2281 encode_putfh(&xdr, args->fhandle, &hdr);
2282 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2283 FATTR4_WORD0_LINK_SUPPORT|
2284 FATTR4_WORD0_SYMLINK_SUPPORT|
2285 FATTR4_WORD0_ACLSUPPORT, &hdr);
2286 encode_nops(&hdr);
2287 return 0;
2288 }
2289
2290 /*
2291 * a RENEW request
2292 */
2293 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2294 {
2295 struct xdr_stream xdr;
2296 struct compound_hdr hdr = {
2297 .nops = 0,
2298 };
2299
2300 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2301 encode_compound_hdr(&xdr, req, &hdr);
2302 encode_renew(&xdr, clp, &hdr);
2303 encode_nops(&hdr);
2304 return 0;
2305 }
2306
2307 /*
2308 * a SETCLIENTID request
2309 */
2310 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2311 {
2312 struct xdr_stream xdr;
2313 struct compound_hdr hdr = {
2314 .nops = 0,
2315 };
2316
2317 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2318 encode_compound_hdr(&xdr, req, &hdr);
2319 encode_setclientid(&xdr, sc, &hdr);
2320 encode_nops(&hdr);
2321 return 0;
2322 }
2323
2324 /*
2325 * a SETCLIENTID_CONFIRM request
2326 */
2327 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2328 {
2329 struct xdr_stream xdr;
2330 struct compound_hdr hdr = {
2331 .nops = 0,
2332 };
2333 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2334
2335 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2336 encode_compound_hdr(&xdr, req, &hdr);
2337 encode_setclientid_confirm(&xdr, clp, &hdr);
2338 encode_putrootfh(&xdr, &hdr);
2339 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2340 encode_nops(&hdr);
2341 return 0;
2342 }
2343
2344 /*
2345 * DELEGRETURN request
2346 */
2347 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2348 {
2349 struct xdr_stream xdr;
2350 struct compound_hdr hdr = {
2351 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2352 };
2353
2354 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2355 encode_compound_hdr(&xdr, req, &hdr);
2356 encode_sequence(&xdr, &args->seq_args, &hdr);
2357 encode_putfh(&xdr, args->fhandle, &hdr);
2358 encode_delegreturn(&xdr, args->stateid, &hdr);
2359 encode_getfattr(&xdr, args->bitmask, &hdr);
2360 encode_nops(&hdr);
2361 return 0;
2362 }
2363
2364 /*
2365 * Encode FS_LOCATIONS request
2366 */
2367 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2368 {
2369 struct xdr_stream xdr;
2370 struct compound_hdr hdr = {
2371 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372 };
2373 uint32_t replen;
2374
2375 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2376 encode_compound_hdr(&xdr, req, &hdr);
2377 encode_sequence(&xdr, &args->seq_args, &hdr);
2378 encode_putfh(&xdr, args->dir_fh, &hdr);
2379 encode_lookup(&xdr, args->name, &hdr);
2380 replen = hdr.replen; /* get the attribute into args->page */
2381 encode_fs_locations(&xdr, args->bitmask, &hdr);
2382
2383 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2384 0, PAGE_SIZE);
2385 encode_nops(&hdr);
2386 return 0;
2387 }
2388
2389 #if defined(CONFIG_NFS_V4_1)
2390 /*
2391 * EXCHANGE_ID request
2392 */
2393 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2394 struct nfs41_exchange_id_args *args)
2395 {
2396 struct xdr_stream xdr;
2397 struct compound_hdr hdr = {
2398 .minorversion = args->client->cl_minorversion,
2399 };
2400
2401 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2402 encode_compound_hdr(&xdr, req, &hdr);
2403 encode_exchange_id(&xdr, args, &hdr);
2404 encode_nops(&hdr);
2405 return 0;
2406 }
2407
2408 /*
2409 * a CREATE_SESSION request
2410 */
2411 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2412 struct nfs41_create_session_args *args)
2413 {
2414 struct xdr_stream xdr;
2415 struct compound_hdr hdr = {
2416 .minorversion = args->client->cl_minorversion,
2417 };
2418
2419 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2420 encode_compound_hdr(&xdr, req, &hdr);
2421 encode_create_session(&xdr, args, &hdr);
2422 encode_nops(&hdr);
2423 return 0;
2424 }
2425
2426 /*
2427 * a DESTROY_SESSION request
2428 */
2429 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2430 struct nfs4_session *session)
2431 {
2432 struct xdr_stream xdr;
2433 struct compound_hdr hdr = {
2434 .minorversion = session->clp->cl_minorversion,
2435 };
2436
2437 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2438 encode_compound_hdr(&xdr, req, &hdr);
2439 encode_destroy_session(&xdr, session, &hdr);
2440 encode_nops(&hdr);
2441 return 0;
2442 }
2443
2444 /*
2445 * a SEQUENCE request
2446 */
2447 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2448 struct nfs4_sequence_args *args)
2449 {
2450 struct xdr_stream xdr;
2451 struct compound_hdr hdr = {
2452 .minorversion = nfs4_xdr_minorversion(args),
2453 };
2454
2455 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2456 encode_compound_hdr(&xdr, req, &hdr);
2457 encode_sequence(&xdr, args, &hdr);
2458 encode_nops(&hdr);
2459 return 0;
2460 }
2461
2462 /*
2463 * a GET_LEASE_TIME request
2464 */
2465 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2466 struct nfs4_get_lease_time_args *args)
2467 {
2468 struct xdr_stream xdr;
2469 struct compound_hdr hdr = {
2470 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2471 };
2472 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2473
2474 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2475 encode_compound_hdr(&xdr, req, &hdr);
2476 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2477 encode_putrootfh(&xdr, &hdr);
2478 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2479 encode_nops(&hdr);
2480 return 0;
2481 }
2482
2483 /*
2484 * a RECLAIM_COMPLETE request
2485 */
2486 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2487 struct nfs41_reclaim_complete_args *args)
2488 {
2489 struct xdr_stream xdr;
2490 struct compound_hdr hdr = {
2491 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2492 };
2493
2494 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2495 encode_compound_hdr(&xdr, req, &hdr);
2496 encode_sequence(&xdr, &args->seq_args, &hdr);
2497 encode_reclaim_complete(&xdr, args, &hdr);
2498 encode_nops(&hdr);
2499 return 0;
2500 }
2501
2502 #endif /* CONFIG_NFS_V4_1 */
2503
2504 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2505 {
2506 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2507 "Remaining buffer length is %tu words.\n",
2508 func, xdr->end - xdr->p);
2509 }
2510
2511 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2512 {
2513 __be32 *p;
2514
2515 p = xdr_inline_decode(xdr, 4);
2516 if (unlikely(!p))
2517 goto out_overflow;
2518 *len = be32_to_cpup(p);
2519 p = xdr_inline_decode(xdr, *len);
2520 if (unlikely(!p))
2521 goto out_overflow;
2522 *string = (char *)p;
2523 return 0;
2524 out_overflow:
2525 print_overflow_msg(__func__, xdr);
2526 return -EIO;
2527 }
2528
2529 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2530 {
2531 __be32 *p;
2532
2533 p = xdr_inline_decode(xdr, 8);
2534 if (unlikely(!p))
2535 goto out_overflow;
2536 hdr->status = be32_to_cpup(p++);
2537 hdr->taglen = be32_to_cpup(p);
2538
2539 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2540 if (unlikely(!p))
2541 goto out_overflow;
2542 hdr->tag = (char *)p;
2543 p += XDR_QUADLEN(hdr->taglen);
2544 hdr->nops = be32_to_cpup(p);
2545 if (unlikely(hdr->nops < 1))
2546 return nfs4_stat_to_errno(hdr->status);
2547 return 0;
2548 out_overflow:
2549 print_overflow_msg(__func__, xdr);
2550 return -EIO;
2551 }
2552
2553 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2554 {
2555 __be32 *p;
2556 uint32_t opnum;
2557 int32_t nfserr;
2558
2559 p = xdr_inline_decode(xdr, 8);
2560 if (unlikely(!p))
2561 goto out_overflow;
2562 opnum = be32_to_cpup(p++);
2563 if (opnum != expected) {
2564 dprintk("nfs: Server returned operation"
2565 " %d but we issued a request for %d\n",
2566 opnum, expected);
2567 return -EIO;
2568 }
2569 nfserr = be32_to_cpup(p);
2570 if (nfserr != NFS_OK)
2571 return nfs4_stat_to_errno(nfserr);
2572 return 0;
2573 out_overflow:
2574 print_overflow_msg(__func__, xdr);
2575 return -EIO;
2576 }
2577
2578 /* Dummy routine */
2579 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2580 {
2581 __be32 *p;
2582 unsigned int strlen;
2583 char *str;
2584
2585 p = xdr_inline_decode(xdr, 12);
2586 if (likely(p))
2587 return decode_opaque_inline(xdr, &strlen, &str);
2588 print_overflow_msg(__func__, xdr);
2589 return -EIO;
2590 }
2591
2592 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2593 {
2594 uint32_t bmlen;
2595 __be32 *p;
2596
2597 p = xdr_inline_decode(xdr, 4);
2598 if (unlikely(!p))
2599 goto out_overflow;
2600 bmlen = be32_to_cpup(p);
2601
2602 bitmap[0] = bitmap[1] = 0;
2603 p = xdr_inline_decode(xdr, (bmlen << 2));
2604 if (unlikely(!p))
2605 goto out_overflow;
2606 if (bmlen > 0) {
2607 bitmap[0] = be32_to_cpup(p++);
2608 if (bmlen > 1)
2609 bitmap[1] = be32_to_cpup(p);
2610 }
2611 return 0;
2612 out_overflow:
2613 print_overflow_msg(__func__, xdr);
2614 return -EIO;
2615 }
2616
2617 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2618 {
2619 __be32 *p;
2620
2621 p = xdr_inline_decode(xdr, 4);
2622 if (unlikely(!p))
2623 goto out_overflow;
2624 *attrlen = be32_to_cpup(p);
2625 *savep = xdr->p;
2626 return 0;
2627 out_overflow:
2628 print_overflow_msg(__func__, xdr);
2629 return -EIO;
2630 }
2631
2632 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2633 {
2634 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2635 decode_attr_bitmap(xdr, bitmask);
2636 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2637 } else
2638 bitmask[0] = bitmask[1] = 0;
2639 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2640 return 0;
2641 }
2642
2643 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2644 {
2645 __be32 *p;
2646 int ret = 0;
2647
2648 *type = 0;
2649 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2650 return -EIO;
2651 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2652 p = xdr_inline_decode(xdr, 4);
2653 if (unlikely(!p))
2654 goto out_overflow;
2655 *type = be32_to_cpup(p);
2656 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2657 dprintk("%s: bad type %d\n", __func__, *type);
2658 return -EIO;
2659 }
2660 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2661 ret = NFS_ATTR_FATTR_TYPE;
2662 }
2663 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2664 return ret;
2665 out_overflow:
2666 print_overflow_msg(__func__, xdr);
2667 return -EIO;
2668 }
2669
2670 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2671 {
2672 __be32 *p;
2673 int ret = 0;
2674
2675 *change = 0;
2676 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2677 return -EIO;
2678 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2679 p = xdr_inline_decode(xdr, 8);
2680 if (unlikely(!p))
2681 goto out_overflow;
2682 xdr_decode_hyper(p, change);
2683 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2684 ret = NFS_ATTR_FATTR_CHANGE;
2685 }
2686 dprintk("%s: change attribute=%Lu\n", __func__,
2687 (unsigned long long)*change);
2688 return ret;
2689 out_overflow:
2690 print_overflow_msg(__func__, xdr);
2691 return -EIO;
2692 }
2693
2694 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2695 {
2696 __be32 *p;
2697 int ret = 0;
2698
2699 *size = 0;
2700 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2701 return -EIO;
2702 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2703 p = xdr_inline_decode(xdr, 8);
2704 if (unlikely(!p))
2705 goto out_overflow;
2706 xdr_decode_hyper(p, size);
2707 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2708 ret = NFS_ATTR_FATTR_SIZE;
2709 }
2710 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2711 return ret;
2712 out_overflow:
2713 print_overflow_msg(__func__, xdr);
2714 return -EIO;
2715 }
2716
2717 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2718 {
2719 __be32 *p;
2720
2721 *res = 0;
2722 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2723 return -EIO;
2724 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2725 p = xdr_inline_decode(xdr, 4);
2726 if (unlikely(!p))
2727 goto out_overflow;
2728 *res = be32_to_cpup(p);
2729 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2730 }
2731 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2732 return 0;
2733 out_overflow:
2734 print_overflow_msg(__func__, xdr);
2735 return -EIO;
2736 }
2737
2738 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2739 {
2740 __be32 *p;
2741
2742 *res = 0;
2743 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2744 return -EIO;
2745 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2746 p = xdr_inline_decode(xdr, 4);
2747 if (unlikely(!p))
2748 goto out_overflow;
2749 *res = be32_to_cpup(p);
2750 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2751 }
2752 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2753 return 0;
2754 out_overflow:
2755 print_overflow_msg(__func__, xdr);
2756 return -EIO;
2757 }
2758
2759 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2760 {
2761 __be32 *p;
2762 int ret = 0;
2763
2764 fsid->major = 0;
2765 fsid->minor = 0;
2766 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2767 return -EIO;
2768 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2769 p = xdr_inline_decode(xdr, 16);
2770 if (unlikely(!p))
2771 goto out_overflow;
2772 p = xdr_decode_hyper(p, &fsid->major);
2773 xdr_decode_hyper(p, &fsid->minor);
2774 bitmap[0] &= ~FATTR4_WORD0_FSID;
2775 ret = NFS_ATTR_FATTR_FSID;
2776 }
2777 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2778 (unsigned long long)fsid->major,
2779 (unsigned long long)fsid->minor);
2780 return ret;
2781 out_overflow:
2782 print_overflow_msg(__func__, xdr);
2783 return -EIO;
2784 }
2785
2786 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2787 {
2788 __be32 *p;
2789
2790 *res = 60;
2791 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2792 return -EIO;
2793 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2794 p = xdr_inline_decode(xdr, 4);
2795 if (unlikely(!p))
2796 goto out_overflow;
2797 *res = be32_to_cpup(p);
2798 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2799 }
2800 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2801 return 0;
2802 out_overflow:
2803 print_overflow_msg(__func__, xdr);
2804 return -EIO;
2805 }
2806
2807 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2808 {
2809 __be32 *p;
2810
2811 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2812 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2813 return -EIO;
2814 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2815 p = xdr_inline_decode(xdr, 4);
2816 if (unlikely(!p))
2817 goto out_overflow;
2818 *res = be32_to_cpup(p);
2819 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2820 }
2821 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2822 return 0;
2823 out_overflow:
2824 print_overflow_msg(__func__, xdr);
2825 return -EIO;
2826 }
2827
2828 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2829 {
2830 __be32 *p;
2831 int ret = 0;
2832
2833 *fileid = 0;
2834 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2835 return -EIO;
2836 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2837 p = xdr_inline_decode(xdr, 8);
2838 if (unlikely(!p))
2839 goto out_overflow;
2840 xdr_decode_hyper(p, fileid);
2841 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2842 ret = NFS_ATTR_FATTR_FILEID;
2843 }
2844 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2845 return ret;
2846 out_overflow:
2847 print_overflow_msg(__func__, xdr);
2848 return -EIO;
2849 }
2850
2851 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2852 {
2853 __be32 *p;
2854 int ret = 0;
2855
2856 *fileid = 0;
2857 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2858 return -EIO;
2859 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2860 p = xdr_inline_decode(xdr, 8);
2861 if (unlikely(!p))
2862 goto out_overflow;
2863 xdr_decode_hyper(p, fileid);
2864 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2865 ret = NFS_ATTR_FATTR_FILEID;
2866 }
2867 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2868 return ret;
2869 out_overflow:
2870 print_overflow_msg(__func__, xdr);
2871 return -EIO;
2872 }
2873
2874 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2875 {
2876 __be32 *p;
2877 int status = 0;
2878
2879 *res = 0;
2880 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2881 return -EIO;
2882 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2883 p = xdr_inline_decode(xdr, 8);
2884 if (unlikely(!p))
2885 goto out_overflow;
2886 xdr_decode_hyper(p, res);
2887 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2888 }
2889 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2890 return status;
2891 out_overflow:
2892 print_overflow_msg(__func__, xdr);
2893 return -EIO;
2894 }
2895
2896 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2897 {
2898 __be32 *p;
2899 int status = 0;
2900
2901 *res = 0;
2902 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2903 return -EIO;
2904 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2905 p = xdr_inline_decode(xdr, 8);
2906 if (unlikely(!p))
2907 goto out_overflow;
2908 xdr_decode_hyper(p, res);
2909 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2910 }
2911 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2912 return status;
2913 out_overflow:
2914 print_overflow_msg(__func__, xdr);
2915 return -EIO;
2916 }
2917
2918 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2919 {
2920 __be32 *p;
2921 int status = 0;
2922
2923 *res = 0;
2924 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2925 return -EIO;
2926 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2927 p = xdr_inline_decode(xdr, 8);
2928 if (unlikely(!p))
2929 goto out_overflow;
2930 xdr_decode_hyper(p, res);
2931 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2932 }
2933 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2934 return status;
2935 out_overflow:
2936 print_overflow_msg(__func__, xdr);
2937 return -EIO;
2938 }
2939
2940 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2941 {
2942 u32 n;
2943 __be32 *p;
2944 int status = 0;
2945
2946 p = xdr_inline_decode(xdr, 4);
2947 if (unlikely(!p))
2948 goto out_overflow;
2949 n = be32_to_cpup(p);
2950 if (n == 0)
2951 goto root_path;
2952 dprintk("path ");
2953 path->ncomponents = 0;
2954 while (path->ncomponents < n) {
2955 struct nfs4_string *component = &path->components[path->ncomponents];
2956 status = decode_opaque_inline(xdr, &component->len, &component->data);
2957 if (unlikely(status != 0))
2958 goto out_eio;
2959 if (path->ncomponents != n)
2960 dprintk("/");
2961 dprintk("%s", component->data);
2962 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2963 path->ncomponents++;
2964 else {
2965 dprintk("cannot parse %d components in path\n", n);
2966 goto out_eio;
2967 }
2968 }
2969 out:
2970 dprintk("\n");
2971 return status;
2972 root_path:
2973 /* a root pathname is sent as a zero component4 */
2974 path->ncomponents = 1;
2975 path->components[0].len=0;
2976 path->components[0].data=NULL;
2977 dprintk("path /\n");
2978 goto out;
2979 out_eio:
2980 dprintk(" status %d", status);
2981 status = -EIO;
2982 goto out;
2983 out_overflow:
2984 print_overflow_msg(__func__, xdr);
2985 return -EIO;
2986 }
2987
2988 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2989 {
2990 int n;
2991 __be32 *p;
2992 int status = -EIO;
2993
2994 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2995 goto out;
2996 status = 0;
2997 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2998 goto out;
2999 dprintk("%s: fsroot ", __func__);
3000 status = decode_pathname(xdr, &res->fs_path);
3001 if (unlikely(status != 0))
3002 goto out;
3003 p = xdr_inline_decode(xdr, 4);
3004 if (unlikely(!p))
3005 goto out_overflow;
3006 n = be32_to_cpup(p);
3007 if (n <= 0)
3008 goto out_eio;
3009 res->nlocations = 0;
3010 while (res->nlocations < n) {
3011 u32 m;
3012 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3013
3014 p = xdr_inline_decode(xdr, 4);
3015 if (unlikely(!p))
3016 goto out_overflow;
3017 m = be32_to_cpup(p);
3018
3019 loc->nservers = 0;
3020 dprintk("%s: servers ", __func__);
3021 while (loc->nservers < m) {
3022 struct nfs4_string *server = &loc->servers[loc->nservers];
3023 status = decode_opaque_inline(xdr, &server->len, &server->data);
3024 if (unlikely(status != 0))
3025 goto out_eio;
3026 dprintk("%s ", server->data);
3027 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3028 loc->nservers++;
3029 else {
3030 unsigned int i;
3031 dprintk("%s: using first %u of %u servers "
3032 "returned for location %u\n",
3033 __func__,
3034 NFS4_FS_LOCATION_MAXSERVERS,
3035 m, res->nlocations);
3036 for (i = loc->nservers; i < m; i++) {
3037 unsigned int len;
3038 char *data;
3039 status = decode_opaque_inline(xdr, &len, &data);
3040 if (unlikely(status != 0))
3041 goto out_eio;
3042 }
3043 }
3044 }
3045 status = decode_pathname(xdr, &loc->rootpath);
3046 if (unlikely(status != 0))
3047 goto out_eio;
3048 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3049 res->nlocations++;
3050 }
3051 if (res->nlocations != 0)
3052 status = NFS_ATTR_FATTR_V4_REFERRAL;
3053 out:
3054 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3055 return status;
3056 out_overflow:
3057 print_overflow_msg(__func__, xdr);
3058 out_eio:
3059 status = -EIO;
3060 goto out;
3061 }
3062
3063 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3064 {
3065 __be32 *p;
3066 int status = 0;
3067
3068 *res = 0;
3069 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3070 return -EIO;
3071 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3072 p = xdr_inline_decode(xdr, 8);
3073 if (unlikely(!p))
3074 goto out_overflow;
3075 xdr_decode_hyper(p, res);
3076 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3077 }
3078 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3079 return status;
3080 out_overflow:
3081 print_overflow_msg(__func__, xdr);
3082 return -EIO;
3083 }
3084
3085 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3086 {
3087 __be32 *p;
3088 int status = 0;
3089
3090 *maxlink = 1;
3091 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3092 return -EIO;
3093 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3094 p = xdr_inline_decode(xdr, 4);
3095 if (unlikely(!p))
3096 goto out_overflow;
3097 *maxlink = be32_to_cpup(p);
3098 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3099 }
3100 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3101 return status;
3102 out_overflow:
3103 print_overflow_msg(__func__, xdr);
3104 return -EIO;
3105 }
3106
3107 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3108 {
3109 __be32 *p;
3110 int status = 0;
3111
3112 *maxname = 1024;
3113 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3114 return -EIO;
3115 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3116 p = xdr_inline_decode(xdr, 4);
3117 if (unlikely(!p))
3118 goto out_overflow;
3119 *maxname = be32_to_cpup(p);
3120 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3121 }
3122 dprintk("%s: maxname=%u\n", __func__, *maxname);
3123 return status;
3124 out_overflow:
3125 print_overflow_msg(__func__, xdr);
3126 return -EIO;
3127 }
3128
3129 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3130 {
3131 __be32 *p;
3132 int status = 0;
3133
3134 *res = 1024;
3135 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3136 return -EIO;
3137 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3138 uint64_t maxread;
3139 p = xdr_inline_decode(xdr, 8);
3140 if (unlikely(!p))
3141 goto out_overflow;
3142 xdr_decode_hyper(p, &maxread);
3143 if (maxread > 0x7FFFFFFF)
3144 maxread = 0x7FFFFFFF;
3145 *res = (uint32_t)maxread;
3146 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3147 }
3148 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3149 return status;
3150 out_overflow:
3151 print_overflow_msg(__func__, xdr);
3152 return -EIO;
3153 }
3154
3155 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3156 {
3157 __be32 *p;
3158 int status = 0;
3159
3160 *res = 1024;
3161 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3162 return -EIO;
3163 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3164 uint64_t maxwrite;
3165 p = xdr_inline_decode(xdr, 8);
3166 if (unlikely(!p))
3167 goto out_overflow;
3168 xdr_decode_hyper(p, &maxwrite);
3169 if (maxwrite > 0x7FFFFFFF)
3170 maxwrite = 0x7FFFFFFF;
3171 *res = (uint32_t)maxwrite;
3172 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3173 }
3174 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3175 return status;
3176 out_overflow:
3177 print_overflow_msg(__func__, xdr);
3178 return -EIO;
3179 }
3180
3181 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3182 {
3183 uint32_t tmp;
3184 __be32 *p;
3185 int ret = 0;
3186
3187 *mode = 0;
3188 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3189 return -EIO;
3190 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3191 p = xdr_inline_decode(xdr, 4);
3192 if (unlikely(!p))
3193 goto out_overflow;
3194 tmp = be32_to_cpup(p);
3195 *mode = tmp & ~S_IFMT;
3196 bitmap[1] &= ~FATTR4_WORD1_MODE;
3197 ret = NFS_ATTR_FATTR_MODE;
3198 }
3199 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3200 return ret;
3201 out_overflow:
3202 print_overflow_msg(__func__, xdr);
3203 return -EIO;
3204 }
3205
3206 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3207 {
3208 __be32 *p;
3209 int ret = 0;
3210
3211 *nlink = 1;
3212 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3213 return -EIO;
3214 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3215 p = xdr_inline_decode(xdr, 4);
3216 if (unlikely(!p))
3217 goto out_overflow;
3218 *nlink = be32_to_cpup(p);
3219 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3220 ret = NFS_ATTR_FATTR_NLINK;
3221 }
3222 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3223 return ret;
3224 out_overflow:
3225 print_overflow_msg(__func__, xdr);
3226 return -EIO;
3227 }
3228
3229 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3230 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3231 {
3232 uint32_t len;
3233 __be32 *p;
3234 int ret = 0;
3235
3236 *uid = -2;
3237 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3238 return -EIO;
3239 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3240 p = xdr_inline_decode(xdr, 4);
3241 if (unlikely(!p))
3242 goto out_overflow;
3243 len = be32_to_cpup(p);
3244 p = xdr_inline_decode(xdr, len);
3245 if (unlikely(!p))
3246 goto out_overflow;
3247 if (!may_sleep) {
3248 /* do nothing */
3249 } else if (len < XDR_MAX_NETOBJ) {
3250 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3251 ret = NFS_ATTR_FATTR_OWNER;
3252 else
3253 dprintk("%s: nfs_map_name_to_uid failed!\n",
3254 __func__);
3255 } else
3256 dprintk("%s: name too long (%u)!\n",
3257 __func__, len);
3258 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3259 }
3260 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3261 return ret;
3262 out_overflow:
3263 print_overflow_msg(__func__, xdr);
3264 return -EIO;
3265 }
3266
3267 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3268 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3269 {
3270 uint32_t len;
3271 __be32 *p;
3272 int ret = 0;
3273
3274 *gid = -2;
3275 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3276 return -EIO;
3277 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3278 p = xdr_inline_decode(xdr, 4);
3279 if (unlikely(!p))
3280 goto out_overflow;
3281 len = be32_to_cpup(p);
3282 p = xdr_inline_decode(xdr, len);
3283 if (unlikely(!p))
3284 goto out_overflow;
3285 if (!may_sleep) {
3286 /* do nothing */
3287 } else if (len < XDR_MAX_NETOBJ) {
3288 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3289 ret = NFS_ATTR_FATTR_GROUP;
3290 else
3291 dprintk("%s: nfs_map_group_to_gid failed!\n",
3292 __func__);
3293 } else
3294 dprintk("%s: name too long (%u)!\n",
3295 __func__, len);
3296 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3297 }
3298 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3299 return ret;
3300 out_overflow:
3301 print_overflow_msg(__func__, xdr);
3302 return -EIO;
3303 }
3304
3305 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3306 {
3307 uint32_t major = 0, minor = 0;
3308 __be32 *p;
3309 int ret = 0;
3310
3311 *rdev = MKDEV(0,0);
3312 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3313 return -EIO;
3314 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3315 dev_t tmp;
3316
3317 p = xdr_inline_decode(xdr, 8);
3318 if (unlikely(!p))
3319 goto out_overflow;
3320 major = be32_to_cpup(p++);
3321 minor = be32_to_cpup(p);
3322 tmp = MKDEV(major, minor);
3323 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3324 *rdev = tmp;
3325 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3326 ret = NFS_ATTR_FATTR_RDEV;
3327 }
3328 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3329 return ret;
3330 out_overflow:
3331 print_overflow_msg(__func__, xdr);
3332 return -EIO;
3333 }
3334
3335 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3336 {
3337 __be32 *p;
3338 int status = 0;
3339
3340 *res = 0;
3341 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3342 return -EIO;
3343 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3344 p = xdr_inline_decode(xdr, 8);
3345 if (unlikely(!p))
3346 goto out_overflow;
3347 xdr_decode_hyper(p, res);
3348 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3349 }
3350 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3351 return status;
3352 out_overflow:
3353 print_overflow_msg(__func__, xdr);
3354 return -EIO;
3355 }
3356
3357 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3358 {
3359 __be32 *p;
3360 int status = 0;
3361
3362 *res = 0;
3363 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3364 return -EIO;
3365 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3366 p = xdr_inline_decode(xdr, 8);
3367 if (unlikely(!p))
3368 goto out_overflow;
3369 xdr_decode_hyper(p, res);
3370 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3371 }
3372 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3373 return status;
3374 out_overflow:
3375 print_overflow_msg(__func__, xdr);
3376 return -EIO;
3377 }
3378
3379 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3380 {
3381 __be32 *p;
3382 int status = 0;
3383
3384 *res = 0;
3385 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3386 return -EIO;
3387 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3388 p = xdr_inline_decode(xdr, 8);
3389 if (unlikely(!p))
3390 goto out_overflow;
3391 xdr_decode_hyper(p, res);
3392 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3393 }
3394 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3395 return status;
3396 out_overflow:
3397 print_overflow_msg(__func__, xdr);
3398 return -EIO;
3399 }
3400
3401 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3402 {
3403 __be32 *p;
3404 int ret = 0;
3405
3406 *used = 0;
3407 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3408 return -EIO;
3409 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3410 p = xdr_inline_decode(xdr, 8);
3411 if (unlikely(!p))
3412 goto out_overflow;
3413 xdr_decode_hyper(p, used);
3414 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3415 ret = NFS_ATTR_FATTR_SPACE_USED;
3416 }
3417 dprintk("%s: space used=%Lu\n", __func__,
3418 (unsigned long long)*used);
3419 return ret;
3420 out_overflow:
3421 print_overflow_msg(__func__, xdr);
3422 return -EIO;
3423 }
3424
3425 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3426 {
3427 __be32 *p;
3428 uint64_t sec;
3429 uint32_t nsec;
3430
3431 p = xdr_inline_decode(xdr, 12);
3432 if (unlikely(!p))
3433 goto out_overflow;
3434 p = xdr_decode_hyper(p, &sec);
3435 nsec = be32_to_cpup(p);
3436 time->tv_sec = (time_t)sec;
3437 time->tv_nsec = (long)nsec;
3438 return 0;
3439 out_overflow:
3440 print_overflow_msg(__func__, xdr);
3441 return -EIO;
3442 }
3443
3444 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3445 {
3446 int status = 0;
3447
3448 time->tv_sec = 0;
3449 time->tv_nsec = 0;
3450 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3451 return -EIO;
3452 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3453 status = decode_attr_time(xdr, time);
3454 if (status == 0)
3455 status = NFS_ATTR_FATTR_ATIME;
3456 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3457 }
3458 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3459 return status;
3460 }
3461
3462 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3463 {
3464 int status = 0;
3465
3466 time->tv_sec = 0;
3467 time->tv_nsec = 0;
3468 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3469 return -EIO;
3470 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3471 status = decode_attr_time(xdr, time);
3472 if (status == 0)
3473 status = NFS_ATTR_FATTR_CTIME;
3474 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3475 }
3476 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3477 return status;
3478 }
3479
3480 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3481 {
3482 int status = 0;
3483
3484 time->tv_sec = 0;
3485 time->tv_nsec = 0;
3486 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3487 return -EIO;
3488 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3489 status = decode_attr_time(xdr, time);
3490 if (status == 0)
3491 status = NFS_ATTR_FATTR_MTIME;
3492 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3493 }
3494 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3495 return status;
3496 }
3497
3498 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3499 {
3500 unsigned int attrwords = XDR_QUADLEN(attrlen);
3501 unsigned int nwords = xdr->p - savep;
3502
3503 if (unlikely(attrwords != nwords)) {
3504 dprintk("%s: server returned incorrect attribute length: "
3505 "%u %c %u\n",
3506 __func__,
3507 attrwords << 2,
3508 (attrwords < nwords) ? '<' : '>',
3509 nwords << 2);
3510 return -EIO;
3511 }
3512 return 0;
3513 }
3514
3515 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3516 {
3517 __be32 *p;
3518
3519 p = xdr_inline_decode(xdr, 20);
3520 if (unlikely(!p))
3521 goto out_overflow;
3522 cinfo->atomic = be32_to_cpup(p++);
3523 p = xdr_decode_hyper(p, &cinfo->before);
3524 xdr_decode_hyper(p, &cinfo->after);
3525 return 0;
3526 out_overflow:
3527 print_overflow_msg(__func__, xdr);
3528 return -EIO;
3529 }
3530
3531 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3532 {
3533 __be32 *p;
3534 uint32_t supp, acc;
3535 int status;
3536
3537 status = decode_op_hdr(xdr, OP_ACCESS);
3538 if (status)
3539 return status;
3540 p = xdr_inline_decode(xdr, 8);
3541 if (unlikely(!p))
3542 goto out_overflow;
3543 supp = be32_to_cpup(p++);
3544 acc = be32_to_cpup(p);
3545 access->supported = supp;
3546 access->access = acc;
3547 return 0;
3548 out_overflow:
3549 print_overflow_msg(__func__, xdr);
3550 return -EIO;
3551 }
3552
3553 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3554 {
3555 __be32 *p;
3556
3557 p = xdr_inline_decode(xdr, len);
3558 if (likely(p)) {
3559 memcpy(buf, p, len);
3560 return 0;
3561 }
3562 print_overflow_msg(__func__, xdr);
3563 return -EIO;
3564 }
3565
3566 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3567 {
3568 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3569 }
3570
3571 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3572 {
3573 int status;
3574
3575 status = decode_op_hdr(xdr, OP_CLOSE);
3576 if (status != -EIO)
3577 nfs_increment_open_seqid(status, res->seqid);
3578 if (!status)
3579 status = decode_stateid(xdr, &res->stateid);
3580 return status;
3581 }
3582
3583 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3584 {
3585 return decode_opaque_fixed(xdr, verifier, 8);
3586 }
3587
3588 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3589 {
3590 int status;
3591
3592 status = decode_op_hdr(xdr, OP_COMMIT);
3593 if (!status)
3594 status = decode_verifier(xdr, res->verf->verifier);
3595 return status;
3596 }
3597
3598 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3599 {
3600 __be32 *p;
3601 uint32_t bmlen;
3602 int status;
3603
3604 status = decode_op_hdr(xdr, OP_CREATE);
3605 if (status)
3606 return status;
3607 if ((status = decode_change_info(xdr, cinfo)))
3608 return status;
3609 p = xdr_inline_decode(xdr, 4);
3610 if (unlikely(!p))
3611 goto out_overflow;
3612 bmlen = be32_to_cpup(p);
3613 p = xdr_inline_decode(xdr, bmlen << 2);
3614 if (likely(p))
3615 return 0;
3616 out_overflow:
3617 print_overflow_msg(__func__, xdr);
3618 return -EIO;
3619 }
3620
3621 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3622 {
3623 __be32 *savep;
3624 uint32_t attrlen, bitmap[2] = {0};
3625 int status;
3626
3627 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3628 goto xdr_error;
3629 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3630 goto xdr_error;
3631 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3632 goto xdr_error;
3633 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3634 goto xdr_error;
3635 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3636 goto xdr_error;
3637 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3638 goto xdr_error;
3639 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3640 goto xdr_error;
3641 status = verify_attr_len(xdr, savep, attrlen);
3642 xdr_error:
3643 dprintk("%s: xdr returned %d!\n", __func__, -status);
3644 return status;
3645 }
3646
3647 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3648 {
3649 __be32 *savep;
3650 uint32_t attrlen, bitmap[2] = {0};
3651 int status;
3652
3653 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3654 goto xdr_error;
3655 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3656 goto xdr_error;
3657 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3658 goto xdr_error;
3659
3660 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3661 goto xdr_error;
3662 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3663 goto xdr_error;
3664 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3665 goto xdr_error;
3666 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3667 goto xdr_error;
3668 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3669 goto xdr_error;
3670 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3671 goto xdr_error;
3672
3673 status = verify_attr_len(xdr, savep, attrlen);
3674 xdr_error:
3675 dprintk("%s: xdr returned %d!\n", __func__, -status);
3676 return status;
3677 }
3678
3679 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3680 {
3681 __be32 *savep;
3682 uint32_t attrlen, bitmap[2] = {0};
3683 int status;
3684
3685 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3686 goto xdr_error;
3687 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3688 goto xdr_error;
3689 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3690 goto xdr_error;
3691
3692 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3693 goto xdr_error;
3694 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3695 goto xdr_error;
3696
3697 status = verify_attr_len(xdr, savep, attrlen);
3698 xdr_error:
3699 dprintk("%s: xdr returned %d!\n", __func__, -status);
3700 return status;
3701 }
3702
3703 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3704 const struct nfs_server *server, int may_sleep)
3705 {
3706 __be32 *savep;
3707 uint32_t attrlen,
3708 bitmap[2] = {0},
3709 type;
3710 int status;
3711 umode_t fmode = 0;
3712 uint64_t fileid;
3713
3714 status = decode_op_hdr(xdr, OP_GETATTR);
3715 if (status < 0)
3716 goto xdr_error;
3717
3718 status = decode_attr_bitmap(xdr, bitmap);
3719 if (status < 0)
3720 goto xdr_error;
3721
3722 status = decode_attr_length(xdr, &attrlen, &savep);
3723 if (status < 0)
3724 goto xdr_error;
3725
3726
3727 status = decode_attr_type(xdr, bitmap, &type);
3728 if (status < 0)
3729 goto xdr_error;
3730 fattr->mode = 0;
3731 if (status != 0) {
3732 fattr->mode |= nfs_type2fmt[type];
3733 fattr->valid |= status;
3734 }
3735
3736 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3737 if (status < 0)
3738 goto xdr_error;
3739 fattr->valid |= status;
3740
3741 status = decode_attr_size(xdr, bitmap, &fattr->size);
3742 if (status < 0)
3743 goto xdr_error;
3744 fattr->valid |= status;
3745
3746 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3747 if (status < 0)
3748 goto xdr_error;
3749 fattr->valid |= status;
3750
3751 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3752 if (status < 0)
3753 goto xdr_error;
3754 fattr->valid |= status;
3755
3756 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3757 struct nfs4_fs_locations,
3758 fattr));
3759 if (status < 0)
3760 goto xdr_error;
3761 fattr->valid |= status;
3762
3763 status = decode_attr_mode(xdr, bitmap, &fmode);
3764 if (status < 0)
3765 goto xdr_error;
3766 if (status != 0) {
3767 fattr->mode |= fmode;
3768 fattr->valid |= status;
3769 }
3770
3771 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3772 if (status < 0)
3773 goto xdr_error;
3774 fattr->valid |= status;
3775
3776 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3777 &fattr->uid, may_sleep);
3778 if (status < 0)
3779 goto xdr_error;
3780 fattr->valid |= status;
3781
3782 status = decode_attr_group(xdr, bitmap, server->nfs_client,
3783 &fattr->gid, may_sleep);
3784 if (status < 0)
3785 goto xdr_error;
3786 fattr->valid |= status;
3787
3788 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3789 if (status < 0)
3790 goto xdr_error;
3791 fattr->valid |= status;
3792
3793 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3794 if (status < 0)
3795 goto xdr_error;
3796 fattr->valid |= status;
3797
3798 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3799 if (status < 0)
3800 goto xdr_error;
3801 fattr->valid |= status;
3802
3803 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3804 if (status < 0)
3805 goto xdr_error;
3806 fattr->valid |= status;
3807
3808 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3809 if (status < 0)
3810 goto xdr_error;
3811 fattr->valid |= status;
3812
3813 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3814 if (status < 0)
3815 goto xdr_error;
3816 if (status != 0 && !(fattr->valid & status)) {
3817 fattr->fileid = fileid;
3818 fattr->valid |= status;
3819 }
3820
3821 status = verify_attr_len(xdr, savep, attrlen);
3822 xdr_error:
3823 dprintk("%s: xdr returned %d\n", __func__, -status);
3824 return status;
3825 }
3826
3827
3828 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3829 {
3830 __be32 *savep;
3831 uint32_t attrlen, bitmap[2];
3832 int status;
3833
3834 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3835 goto xdr_error;
3836 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3837 goto xdr_error;
3838 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3839 goto xdr_error;
3840
3841 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3842
3843 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3844 goto xdr_error;
3845 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3846 goto xdr_error;
3847 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3848 goto xdr_error;
3849 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3850 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3851 goto xdr_error;
3852 fsinfo->wtpref = fsinfo->wtmax;
3853
3854 status = verify_attr_len(xdr, savep, attrlen);
3855 xdr_error:
3856 dprintk("%s: xdr returned %d!\n", __func__, -status);
3857 return status;
3858 }
3859
3860 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3861 {
3862 __be32 *p;
3863 uint32_t len;
3864 int status;
3865
3866 /* Zero handle first to allow comparisons */
3867 memset(fh, 0, sizeof(*fh));
3868
3869 status = decode_op_hdr(xdr, OP_GETFH);
3870 if (status)
3871 return status;
3872
3873 p = xdr_inline_decode(xdr, 4);
3874 if (unlikely(!p))
3875 goto out_overflow;
3876 len = be32_to_cpup(p);
3877 if (len > NFS4_FHSIZE)
3878 return -EIO;
3879 fh->size = len;
3880 p = xdr_inline_decode(xdr, len);
3881 if (unlikely(!p))
3882 goto out_overflow;
3883 memcpy(fh->data, p, len);
3884 return 0;
3885 out_overflow:
3886 print_overflow_msg(__func__, xdr);
3887 return -EIO;
3888 }
3889
3890 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3891 {
3892 int status;
3893
3894 status = decode_op_hdr(xdr, OP_LINK);
3895 if (status)
3896 return status;
3897 return decode_change_info(xdr, cinfo);
3898 }
3899
3900 /*
3901 * We create the owner, so we know a proper owner.id length is 4.
3902 */
3903 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3904 {
3905 uint64_t offset, length, clientid;
3906 __be32 *p;
3907 uint32_t namelen, type;
3908
3909 p = xdr_inline_decode(xdr, 32);
3910 if (unlikely(!p))
3911 goto out_overflow;
3912 p = xdr_decode_hyper(p, &offset);
3913 p = xdr_decode_hyper(p, &length);
3914 type = be32_to_cpup(p++);
3915 if (fl != NULL) {
3916 fl->fl_start = (loff_t)offset;
3917 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3918 if (length == ~(uint64_t)0)
3919 fl->fl_end = OFFSET_MAX;
3920 fl->fl_type = F_WRLCK;
3921 if (type & 1)
3922 fl->fl_type = F_RDLCK;
3923 fl->fl_pid = 0;
3924 }
3925 p = xdr_decode_hyper(p, &clientid);
3926 namelen = be32_to_cpup(p);
3927 p = xdr_inline_decode(xdr, namelen);
3928 if (likely(p))
3929 return -NFS4ERR_DENIED;
3930 out_overflow:
3931 print_overflow_msg(__func__, xdr);
3932 return -EIO;
3933 }
3934
3935 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3936 {
3937 int status;
3938
3939 status = decode_op_hdr(xdr, OP_LOCK);
3940 if (status == -EIO)
3941 goto out;
3942 if (status == 0) {
3943 status = decode_stateid(xdr, &res->stateid);
3944 if (unlikely(status))
3945 goto out;
3946 } else if (status == -NFS4ERR_DENIED)
3947 status = decode_lock_denied(xdr, NULL);
3948 if (res->open_seqid != NULL)
3949 nfs_increment_open_seqid(status, res->open_seqid);
3950 nfs_increment_lock_seqid(status, res->lock_seqid);
3951 out:
3952 return status;
3953 }
3954
3955 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3956 {
3957 int status;
3958 status = decode_op_hdr(xdr, OP_LOCKT);
3959 if (status == -NFS4ERR_DENIED)
3960 return decode_lock_denied(xdr, res->denied);
3961 return status;
3962 }
3963
3964 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3965 {
3966 int status;
3967
3968 status = decode_op_hdr(xdr, OP_LOCKU);
3969 if (status != -EIO)
3970 nfs_increment_lock_seqid(status, res->seqid);
3971 if (status == 0)
3972 status = decode_stateid(xdr, &res->stateid);
3973 return status;
3974 }
3975
3976 static int decode_lookup(struct xdr_stream *xdr)
3977 {
3978 return decode_op_hdr(xdr, OP_LOOKUP);
3979 }
3980
3981 /* This is too sick! */
3982 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3983 {
3984 __be32 *p;
3985 uint32_t limit_type, nblocks, blocksize;
3986
3987 p = xdr_inline_decode(xdr, 12);
3988 if (unlikely(!p))
3989 goto out_overflow;
3990 limit_type = be32_to_cpup(p++);
3991 switch (limit_type) {
3992 case 1:
3993 xdr_decode_hyper(p, maxsize);
3994 break;
3995 case 2:
3996 nblocks = be32_to_cpup(p++);
3997 blocksize = be32_to_cpup(p);
3998 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3999 }
4000 return 0;
4001 out_overflow:
4002 print_overflow_msg(__func__, xdr);
4003 return -EIO;
4004 }
4005
4006 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4007 {
4008 __be32 *p;
4009 uint32_t delegation_type;
4010 int status;
4011
4012 p = xdr_inline_decode(xdr, 4);
4013 if (unlikely(!p))
4014 goto out_overflow;
4015 delegation_type = be32_to_cpup(p);
4016 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4017 res->delegation_type = 0;
4018 return 0;
4019 }
4020 status = decode_stateid(xdr, &res->delegation);
4021 if (unlikely(status))
4022 return status;
4023 p = xdr_inline_decode(xdr, 4);
4024 if (unlikely(!p))
4025 goto out_overflow;
4026 res->do_recall = be32_to_cpup(p);
4027
4028 switch (delegation_type) {
4029 case NFS4_OPEN_DELEGATE_READ:
4030 res->delegation_type = FMODE_READ;
4031 break;
4032 case NFS4_OPEN_DELEGATE_WRITE:
4033 res->delegation_type = FMODE_WRITE|FMODE_READ;
4034 if (decode_space_limit(xdr, &res->maxsize) < 0)
4035 return -EIO;
4036 }
4037 return decode_ace(xdr, NULL, res->server->nfs_client);
4038 out_overflow:
4039 print_overflow_msg(__func__, xdr);
4040 return -EIO;
4041 }
4042
4043 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4044 {
4045 __be32 *p;
4046 uint32_t savewords, bmlen, i;
4047 int status;
4048
4049 status = decode_op_hdr(xdr, OP_OPEN);
4050 if (status != -EIO)
4051 nfs_increment_open_seqid(status, res->seqid);
4052 if (!status)
4053 status = decode_stateid(xdr, &res->stateid);
4054 if (unlikely(status))
4055 return status;
4056
4057 decode_change_info(xdr, &res->cinfo);
4058
4059 p = xdr_inline_decode(xdr, 8);
4060 if (unlikely(!p))
4061 goto out_overflow;
4062 res->rflags = be32_to_cpup(p++);
4063 bmlen = be32_to_cpup(p);
4064 if (bmlen > 10)
4065 goto xdr_error;
4066
4067 p = xdr_inline_decode(xdr, bmlen << 2);
4068 if (unlikely(!p))
4069 goto out_overflow;
4070 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4071 for (i = 0; i < savewords; ++i)
4072 res->attrset[i] = be32_to_cpup(p++);
4073 for (; i < NFS4_BITMAP_SIZE; i++)
4074 res->attrset[i] = 0;
4075
4076 return decode_delegation(xdr, res);
4077 xdr_error:
4078 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4079 return -EIO;
4080 out_overflow:
4081 print_overflow_msg(__func__, xdr);
4082 return -EIO;
4083 }
4084
4085 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4086 {
4087 int status;
4088
4089 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4090 if (status != -EIO)
4091 nfs_increment_open_seqid(status, res->seqid);
4092 if (!status)
4093 status = decode_stateid(xdr, &res->stateid);
4094 return status;
4095 }
4096
4097 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4098 {
4099 int status;
4100
4101 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4102 if (status != -EIO)
4103 nfs_increment_open_seqid(status, res->seqid);
4104 if (!status)
4105 status = decode_stateid(xdr, &res->stateid);
4106 return status;
4107 }
4108
4109 static int decode_putfh(struct xdr_stream *xdr)
4110 {
4111 return decode_op_hdr(xdr, OP_PUTFH);
4112 }
4113
4114 static int decode_putrootfh(struct xdr_stream *xdr)
4115 {
4116 return decode_op_hdr(xdr, OP_PUTROOTFH);
4117 }
4118
4119 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4120 {
4121 struct kvec *iov = req->rq_rcv_buf.head;
4122 __be32 *p;
4123 uint32_t count, eof, recvd, hdrlen;
4124 int status;
4125
4126 status = decode_op_hdr(xdr, OP_READ);
4127 if (status)
4128 return status;
4129 p = xdr_inline_decode(xdr, 8);
4130 if (unlikely(!p))
4131 goto out_overflow;
4132 eof = be32_to_cpup(p++);
4133 count = be32_to_cpup(p);
4134 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4135 recvd = req->rq_rcv_buf.len - hdrlen;
4136 if (count > recvd) {
4137 dprintk("NFS: server cheating in read reply: "
4138 "count %u > recvd %u\n", count, recvd);
4139 count = recvd;
4140 eof = 0;
4141 }
4142 xdr_read_pages(xdr, count);
4143 res->eof = eof;
4144 res->count = count;
4145 return 0;
4146 out_overflow:
4147 print_overflow_msg(__func__, xdr);
4148 return -EIO;
4149 }
4150
4151 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4152 {
4153 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4154 struct page *page = *rcvbuf->pages;
4155 struct kvec *iov = rcvbuf->head;
4156 size_t hdrlen;
4157 u32 recvd, pglen = rcvbuf->page_len;
4158 __be32 *end, *entry, *p, *kaddr;
4159 unsigned int nr = 0;
4160 int status;
4161
4162 status = decode_op_hdr(xdr, OP_READDIR);
4163 if (!status)
4164 status = decode_verifier(xdr, readdir->verifier.data);
4165 if (unlikely(status))
4166 return status;
4167 dprintk("%s: verifier = %08x:%08x\n",
4168 __func__,
4169 ((u32 *)readdir->verifier.data)[0],
4170 ((u32 *)readdir->verifier.data)[1]);
4171
4172
4173 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4174 recvd = rcvbuf->len - hdrlen;
4175 if (pglen > recvd)
4176 pglen = recvd;
4177 xdr_read_pages(xdr, pglen);
4178
4179 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4180 kaddr = p = kmap_atomic(page, KM_USER0);
4181 end = p + ((pglen + readdir->pgbase) >> 2);
4182 entry = p;
4183
4184 /* Make sure the packet actually has a value_follows and EOF entry */
4185 if ((entry + 1) > end)
4186 goto short_pkt;
4187
4188 for (; *p++; nr++) {
4189 u32 len, attrlen, xlen;
4190 if (end - p < 3)
4191 goto short_pkt;
4192 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4193 p += 2; /* cookie */
4194 len = ntohl(*p++); /* filename length */
4195 if (len > NFS4_MAXNAMLEN) {
4196 dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4197 len);
4198 goto err_unmap;
4199 }
4200 xlen = XDR_QUADLEN(len);
4201 if (end - p < xlen + 1)
4202 goto short_pkt;
4203 dprintk("filename = %*s\n", len, (char *)p);
4204 p += xlen;
4205 len = ntohl(*p++); /* bitmap length */
4206 if (end - p < len + 1)
4207 goto short_pkt;
4208 p += len;
4209 attrlen = XDR_QUADLEN(ntohl(*p++));
4210 if (end - p < attrlen + 2)
4211 goto short_pkt;
4212 p += attrlen; /* attributes */
4213 entry = p;
4214 }
4215 /*
4216 * Apparently some server sends responses that are a valid size, but
4217 * contain no entries, and have value_follows==0 and EOF==0. For
4218 * those, just set the EOF marker.
4219 */
4220 if (!nr && entry[1] == 0) {
4221 dprintk("NFS: readdir reply truncated!\n");
4222 entry[1] = 1;
4223 }
4224 out:
4225 kunmap_atomic(kaddr, KM_USER0);
4226 return 0;
4227 short_pkt:
4228 /*
4229 * When we get a short packet there are 2 possibilities. We can
4230 * return an error, or fix up the response to look like a valid
4231 * response and return what we have so far. If there are no
4232 * entries and the packet was short, then return -EIO. If there
4233 * are valid entries in the response, return them and pretend that
4234 * the call was successful, but incomplete. The caller can retry the
4235 * readdir starting at the last cookie.
4236 */
4237 dprintk("%s: short packet at entry %d\n", __func__, nr);
4238 entry[0] = entry[1] = 0;
4239 if (nr)
4240 goto out;
4241 err_unmap:
4242 kunmap_atomic(kaddr, KM_USER0);
4243 return -errno_NFSERR_IO;
4244 }
4245
4246 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4247 {
4248 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4249 struct kvec *iov = rcvbuf->head;
4250 size_t hdrlen;
4251 u32 len, recvd;
4252 __be32 *p;
4253 char *kaddr;
4254 int status;
4255
4256 status = decode_op_hdr(xdr, OP_READLINK);
4257 if (status)
4258 return status;
4259
4260 /* Convert length of symlink */
4261 p = xdr_inline_decode(xdr, 4);
4262 if (unlikely(!p))
4263 goto out_overflow;
4264 len = be32_to_cpup(p);
4265 if (len >= rcvbuf->page_len || len <= 0) {
4266 dprintk("nfs: server returned giant symlink!\n");
4267 return -ENAMETOOLONG;
4268 }
4269 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4270 recvd = req->rq_rcv_buf.len - hdrlen;
4271 if (recvd < len) {
4272 dprintk("NFS: server cheating in readlink reply: "
4273 "count %u > recvd %u\n", len, recvd);
4274 return -EIO;
4275 }
4276 xdr_read_pages(xdr, len);
4277 /*
4278 * The XDR encode routine has set things up so that
4279 * the link text will be copied directly into the
4280 * buffer. We just have to do overflow-checking,
4281 * and and null-terminate the text (the VFS expects
4282 * null-termination).
4283 */
4284 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4285 kaddr[len+rcvbuf->page_base] = '\0';
4286 kunmap_atomic(kaddr, KM_USER0);
4287 return 0;
4288 out_overflow:
4289 print_overflow_msg(__func__, xdr);
4290 return -EIO;
4291 }
4292
4293 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4294 {
4295 int status;
4296
4297 status = decode_op_hdr(xdr, OP_REMOVE);
4298 if (status)
4299 goto out;
4300 status = decode_change_info(xdr, cinfo);
4301 out:
4302 return status;
4303 }
4304
4305 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4306 struct nfs4_change_info *new_cinfo)
4307 {
4308 int status;
4309
4310 status = decode_op_hdr(xdr, OP_RENAME);
4311 if (status)
4312 goto out;
4313 if ((status = decode_change_info(xdr, old_cinfo)))
4314 goto out;
4315 status = decode_change_info(xdr, new_cinfo);
4316 out:
4317 return status;
4318 }
4319
4320 static int decode_renew(struct xdr_stream *xdr)
4321 {
4322 return decode_op_hdr(xdr, OP_RENEW);
4323 }
4324
4325 static int
4326 decode_restorefh(struct xdr_stream *xdr)
4327 {
4328 return decode_op_hdr(xdr, OP_RESTOREFH);
4329 }
4330
4331 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4332 size_t *acl_len)
4333 {
4334 __be32 *savep;
4335 uint32_t attrlen,
4336 bitmap[2] = {0};
4337 struct kvec *iov = req->rq_rcv_buf.head;
4338 int status;
4339
4340 *acl_len = 0;
4341 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4342 goto out;
4343 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4344 goto out;
4345 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4346 goto out;
4347
4348 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4349 return -EIO;
4350 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4351 size_t hdrlen;
4352 u32 recvd;
4353
4354 /* We ignore &savep and don't do consistency checks on
4355 * the attr length. Let userspace figure it out.... */
4356 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4357 recvd = req->rq_rcv_buf.len - hdrlen;
4358 if (attrlen > recvd) {
4359 dprintk("NFS: server cheating in getattr"
4360 " acl reply: attrlen %u > recvd %u\n",
4361 attrlen, recvd);
4362 return -EINVAL;
4363 }
4364 xdr_read_pages(xdr, attrlen);
4365 *acl_len = attrlen;
4366 } else
4367 status = -EOPNOTSUPP;
4368
4369 out:
4370 return status;
4371 }
4372
4373 static int
4374 decode_savefh(struct xdr_stream *xdr)
4375 {
4376 return decode_op_hdr(xdr, OP_SAVEFH);
4377 }
4378
4379 static int decode_setattr(struct xdr_stream *xdr)
4380 {
4381 __be32 *p;
4382 uint32_t bmlen;
4383 int status;
4384
4385 status = decode_op_hdr(xdr, OP_SETATTR);
4386 if (status)
4387 return status;
4388 p = xdr_inline_decode(xdr, 4);
4389 if (unlikely(!p))
4390 goto out_overflow;
4391 bmlen = be32_to_cpup(p);
4392 p = xdr_inline_decode(xdr, bmlen << 2);
4393 if (likely(p))
4394 return 0;
4395 out_overflow:
4396 print_overflow_msg(__func__, xdr);
4397 return -EIO;
4398 }
4399
4400 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4401 {
4402 __be32 *p;
4403 uint32_t opnum;
4404 int32_t nfserr;
4405
4406 p = xdr_inline_decode(xdr, 8);
4407 if (unlikely(!p))
4408 goto out_overflow;
4409 opnum = be32_to_cpup(p++);
4410 if (opnum != OP_SETCLIENTID) {
4411 dprintk("nfs: decode_setclientid: Server returned operation"
4412 " %d\n", opnum);
4413 return -EIO;
4414 }
4415 nfserr = be32_to_cpup(p);
4416 if (nfserr == NFS_OK) {
4417 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4418 if (unlikely(!p))
4419 goto out_overflow;
4420 p = xdr_decode_hyper(p, &clp->cl_clientid);
4421 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4422 } else if (nfserr == NFSERR_CLID_INUSE) {
4423 uint32_t len;
4424
4425 /* skip netid string */
4426 p = xdr_inline_decode(xdr, 4);
4427 if (unlikely(!p))
4428 goto out_overflow;
4429 len = be32_to_cpup(p);
4430 p = xdr_inline_decode(xdr, len);
4431 if (unlikely(!p))
4432 goto out_overflow;
4433
4434 /* skip uaddr string */
4435 p = xdr_inline_decode(xdr, 4);
4436 if (unlikely(!p))
4437 goto out_overflow;
4438 len = be32_to_cpup(p);
4439 p = xdr_inline_decode(xdr, len);
4440 if (unlikely(!p))
4441 goto out_overflow;
4442 return -NFSERR_CLID_INUSE;
4443 } else
4444 return nfs4_stat_to_errno(nfserr);
4445
4446 return 0;
4447 out_overflow:
4448 print_overflow_msg(__func__, xdr);
4449 return -EIO;
4450 }
4451
4452 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4453 {
4454 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4455 }
4456
4457 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4458 {
4459 __be32 *p;
4460 int status;
4461
4462 status = decode_op_hdr(xdr, OP_WRITE);
4463 if (status)
4464 return status;
4465
4466 p = xdr_inline_decode(xdr, 16);
4467 if (unlikely(!p))
4468 goto out_overflow;
4469 res->count = be32_to_cpup(p++);
4470 res->verf->committed = be32_to_cpup(p++);
4471 memcpy(res->verf->verifier, p, 8);
4472 return 0;
4473 out_overflow:
4474 print_overflow_msg(__func__, xdr);
4475 return -EIO;
4476 }
4477
4478 static int decode_delegreturn(struct xdr_stream *xdr)
4479 {
4480 return decode_op_hdr(xdr, OP_DELEGRETURN);
4481 }
4482
4483 #if defined(CONFIG_NFS_V4_1)
4484 static int decode_exchange_id(struct xdr_stream *xdr,
4485 struct nfs41_exchange_id_res *res)
4486 {
4487 __be32 *p;
4488 uint32_t dummy;
4489 char *dummy_str;
4490 int status;
4491 struct nfs_client *clp = res->client;
4492
4493 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4494 if (status)
4495 return status;
4496
4497 p = xdr_inline_decode(xdr, 8);
4498 if (unlikely(!p))
4499 goto out_overflow;
4500 xdr_decode_hyper(p, &clp->cl_ex_clid);
4501 p = xdr_inline_decode(xdr, 12);
4502 if (unlikely(!p))
4503 goto out_overflow;
4504 clp->cl_seqid = be32_to_cpup(p++);
4505 clp->cl_exchange_flags = be32_to_cpup(p++);
4506
4507 /* We ask for SP4_NONE */
4508 dummy = be32_to_cpup(p);
4509 if (dummy != SP4_NONE)
4510 return -EIO;
4511
4512 /* Throw away minor_id */
4513 p = xdr_inline_decode(xdr, 8);
4514 if (unlikely(!p))
4515 goto out_overflow;
4516
4517 /* Throw away Major id */
4518 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4519 if (unlikely(status))
4520 return status;
4521
4522 /* Throw away server_scope */
4523 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4524 if (unlikely(status))
4525 return status;
4526
4527 /* Throw away Implementation id array */
4528 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4529 if (unlikely(status))
4530 return status;
4531
4532 return 0;
4533 out_overflow:
4534 print_overflow_msg(__func__, xdr);
4535 return -EIO;
4536 }
4537
4538 static int decode_chan_attrs(struct xdr_stream *xdr,
4539 struct nfs4_channel_attrs *attrs)
4540 {
4541 __be32 *p;
4542 u32 nr_attrs;
4543
4544 p = xdr_inline_decode(xdr, 28);
4545 if (unlikely(!p))
4546 goto out_overflow;
4547 attrs->headerpadsz = be32_to_cpup(p++);
4548 attrs->max_rqst_sz = be32_to_cpup(p++);
4549 attrs->max_resp_sz = be32_to_cpup(p++);
4550 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4551 attrs->max_ops = be32_to_cpup(p++);
4552 attrs->max_reqs = be32_to_cpup(p++);
4553 nr_attrs = be32_to_cpup(p);
4554 if (unlikely(nr_attrs > 1)) {
4555 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4556 __func__, nr_attrs);
4557 return -EINVAL;
4558 }
4559 if (nr_attrs == 1) {
4560 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4561 if (unlikely(!p))
4562 goto out_overflow;
4563 }
4564 return 0;
4565 out_overflow:
4566 print_overflow_msg(__func__, xdr);
4567 return -EIO;
4568 }
4569
4570 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4571 {
4572 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4573 }
4574
4575 static int decode_create_session(struct xdr_stream *xdr,
4576 struct nfs41_create_session_res *res)
4577 {
4578 __be32 *p;
4579 int status;
4580 struct nfs_client *clp = res->client;
4581 struct nfs4_session *session = clp->cl_session;
4582
4583 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4584 if (!status)
4585 status = decode_sessionid(xdr, &session->sess_id);
4586 if (unlikely(status))
4587 return status;
4588
4589 /* seqid, flags */
4590 p = xdr_inline_decode(xdr, 8);
4591 if (unlikely(!p))
4592 goto out_overflow;
4593 clp->cl_seqid = be32_to_cpup(p++);
4594 session->flags = be32_to_cpup(p);
4595
4596 /* Channel attributes */
4597 status = decode_chan_attrs(xdr, &session->fc_attrs);
4598 if (!status)
4599 status = decode_chan_attrs(xdr, &session->bc_attrs);
4600 return status;
4601 out_overflow:
4602 print_overflow_msg(__func__, xdr);
4603 return -EIO;
4604 }
4605
4606 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4607 {
4608 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4609 }
4610
4611 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4612 {
4613 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4614 }
4615 #endif /* CONFIG_NFS_V4_1 */
4616
4617 static int decode_sequence(struct xdr_stream *xdr,
4618 struct nfs4_sequence_res *res,
4619 struct rpc_rqst *rqstp)
4620 {
4621 #if defined(CONFIG_NFS_V4_1)
4622 struct nfs4_slot *slot;
4623 struct nfs4_sessionid id;
4624 u32 dummy;
4625 int status;
4626 __be32 *p;
4627
4628 if (!res->sr_session)
4629 return 0;
4630
4631 status = decode_op_hdr(xdr, OP_SEQUENCE);
4632 if (!status)
4633 status = decode_sessionid(xdr, &id);
4634 if (unlikely(status))
4635 goto out_err;
4636
4637 /*
4638 * If the server returns different values for sessionID, slotID or
4639 * sequence number, the server is looney tunes.
4640 */
4641 status = -EREMOTEIO;
4642
4643 if (memcmp(id.data, res->sr_session->sess_id.data,
4644 NFS4_MAX_SESSIONID_LEN)) {
4645 dprintk("%s Invalid session id\n", __func__);
4646 goto out_err;
4647 }
4648
4649 p = xdr_inline_decode(xdr, 20);
4650 if (unlikely(!p))
4651 goto out_overflow;
4652
4653 /* seqid */
4654 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4655 dummy = be32_to_cpup(p++);
4656 if (dummy != slot->seq_nr) {
4657 dprintk("%s Invalid sequence number\n", __func__);
4658 goto out_err;
4659 }
4660 /* slot id */
4661 dummy = be32_to_cpup(p++);
4662 if (dummy != res->sr_slotid) {
4663 dprintk("%s Invalid slot id\n", __func__);
4664 goto out_err;
4665 }
4666 /* highest slot id - currently not processed */
4667 dummy = be32_to_cpup(p++);
4668 /* target highest slot id - currently not processed */
4669 dummy = be32_to_cpup(p++);
4670 /* result flags */
4671 res->sr_status_flags = be32_to_cpup(p);
4672 status = 0;
4673 out_err:
4674 res->sr_status = status;
4675 return status;
4676 out_overflow:
4677 print_overflow_msg(__func__, xdr);
4678 status = -EIO;
4679 goto out_err;
4680 #else /* CONFIG_NFS_V4_1 */
4681 return 0;
4682 #endif /* CONFIG_NFS_V4_1 */
4683 }
4684
4685 /*
4686 * END OF "GENERIC" DECODE ROUTINES.
4687 */
4688
4689 /*
4690 * Decode OPEN_DOWNGRADE response
4691 */
4692 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4693 {
4694 struct xdr_stream xdr;
4695 struct compound_hdr hdr;
4696 int status;
4697
4698 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4699 status = decode_compound_hdr(&xdr, &hdr);
4700 if (status)
4701 goto out;
4702 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4703 if (status)
4704 goto out;
4705 status = decode_putfh(&xdr);
4706 if (status)
4707 goto out;
4708 status = decode_open_downgrade(&xdr, res);
4709 if (status != 0)
4710 goto out;
4711 decode_getfattr(&xdr, res->fattr, res->server,
4712 !RPC_IS_ASYNC(rqstp->rq_task));
4713 out:
4714 return status;
4715 }
4716
4717 /*
4718 * Decode ACCESS response
4719 */
4720 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4721 {
4722 struct xdr_stream xdr;
4723 struct compound_hdr hdr;
4724 int status;
4725
4726 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4727 status = decode_compound_hdr(&xdr, &hdr);
4728 if (status)
4729 goto out;
4730 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4731 if (status)
4732 goto out;
4733 status = decode_putfh(&xdr);
4734 if (status != 0)
4735 goto out;
4736 status = decode_access(&xdr, res);
4737 if (status != 0)
4738 goto out;
4739 decode_getfattr(&xdr, res->fattr, res->server,
4740 !RPC_IS_ASYNC(rqstp->rq_task));
4741 out:
4742 return status;
4743 }
4744
4745 /*
4746 * Decode LOOKUP response
4747 */
4748 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4749 {
4750 struct xdr_stream xdr;
4751 struct compound_hdr hdr;
4752 int status;
4753
4754 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4755 status = decode_compound_hdr(&xdr, &hdr);
4756 if (status)
4757 goto out;
4758 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4759 if (status)
4760 goto out;
4761 if ((status = decode_putfh(&xdr)) != 0)
4762 goto out;
4763 if ((status = decode_lookup(&xdr)) != 0)
4764 goto out;
4765 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4766 goto out;
4767 status = decode_getfattr(&xdr, res->fattr, res->server
4768 ,!RPC_IS_ASYNC(rqstp->rq_task));
4769 out:
4770 return status;
4771 }
4772
4773 /*
4774 * Decode LOOKUP_ROOT response
4775 */
4776 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4777 {
4778 struct xdr_stream xdr;
4779 struct compound_hdr hdr;
4780 int status;
4781
4782 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4783 status = decode_compound_hdr(&xdr, &hdr);
4784 if (status)
4785 goto out;
4786 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4787 if (status)
4788 goto out;
4789 if ((status = decode_putrootfh(&xdr)) != 0)
4790 goto out;
4791 if ((status = decode_getfh(&xdr, res->fh)) == 0)
4792 status = decode_getfattr(&xdr, res->fattr, res->server,
4793 !RPC_IS_ASYNC(rqstp->rq_task));
4794 out:
4795 return status;
4796 }
4797
4798 /*
4799 * Decode REMOVE response
4800 */
4801 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4802 {
4803 struct xdr_stream xdr;
4804 struct compound_hdr hdr;
4805 int status;
4806
4807 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4808 status = decode_compound_hdr(&xdr, &hdr);
4809 if (status)
4810 goto out;
4811 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4812 if (status)
4813 goto out;
4814 if ((status = decode_putfh(&xdr)) != 0)
4815 goto out;
4816 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4817 goto out;
4818 decode_getfattr(&xdr, &res->dir_attr, res->server,
4819 !RPC_IS_ASYNC(rqstp->rq_task));
4820 out:
4821 return status;
4822 }
4823
4824 /*
4825 * Decode RENAME response
4826 */
4827 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4828 {
4829 struct xdr_stream xdr;
4830 struct compound_hdr hdr;
4831 int status;
4832
4833 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4834 status = decode_compound_hdr(&xdr, &hdr);
4835 if (status)
4836 goto out;
4837 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4838 if (status)
4839 goto out;
4840 if ((status = decode_putfh(&xdr)) != 0)
4841 goto out;
4842 if ((status = decode_savefh(&xdr)) != 0)
4843 goto out;
4844 if ((status = decode_putfh(&xdr)) != 0)
4845 goto out;
4846 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4847 goto out;
4848 /* Current FH is target directory */
4849 if (decode_getfattr(&xdr, res->new_fattr, res->server,
4850 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4851 goto out;
4852 if ((status = decode_restorefh(&xdr)) != 0)
4853 goto out;
4854 decode_getfattr(&xdr, res->old_fattr, res->server,
4855 !RPC_IS_ASYNC(rqstp->rq_task));
4856 out:
4857 return status;
4858 }
4859
4860 /*
4861 * Decode LINK response
4862 */
4863 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4864 {
4865 struct xdr_stream xdr;
4866 struct compound_hdr hdr;
4867 int status;
4868
4869 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4870 status = decode_compound_hdr(&xdr, &hdr);
4871 if (status)
4872 goto out;
4873 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4874 if (status)
4875 goto out;
4876 if ((status = decode_putfh(&xdr)) != 0)
4877 goto out;
4878 if ((status = decode_savefh(&xdr)) != 0)
4879 goto out;
4880 if ((status = decode_putfh(&xdr)) != 0)
4881 goto out;
4882 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4883 goto out;
4884 /*
4885 * Note order: OP_LINK leaves the directory as the current
4886 * filehandle.
4887 */
4888 if (decode_getfattr(&xdr, res->dir_attr, res->server,
4889 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4890 goto out;
4891 if ((status = decode_restorefh(&xdr)) != 0)
4892 goto out;
4893 decode_getfattr(&xdr, res->fattr, res->server,
4894 !RPC_IS_ASYNC(rqstp->rq_task));
4895 out:
4896 return status;
4897 }
4898
4899 /*
4900 * Decode CREATE response
4901 */
4902 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4903 {
4904 struct xdr_stream xdr;
4905 struct compound_hdr hdr;
4906 int status;
4907
4908 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4909 status = decode_compound_hdr(&xdr, &hdr);
4910 if (status)
4911 goto out;
4912 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4913 if (status)
4914 goto out;
4915 if ((status = decode_putfh(&xdr)) != 0)
4916 goto out;
4917 if ((status = decode_savefh(&xdr)) != 0)
4918 goto out;
4919 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4920 goto out;
4921 if ((status = decode_getfh(&xdr, res->fh)) != 0)
4922 goto out;
4923 if (decode_getfattr(&xdr, res->fattr, res->server,
4924 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4925 goto out;
4926 if ((status = decode_restorefh(&xdr)) != 0)
4927 goto out;
4928 decode_getfattr(&xdr, res->dir_fattr, res->server,
4929 !RPC_IS_ASYNC(rqstp->rq_task));
4930 out:
4931 return status;
4932 }
4933
4934 /*
4935 * Decode SYMLINK response
4936 */
4937 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4938 {
4939 return nfs4_xdr_dec_create(rqstp, p, res);
4940 }
4941
4942 /*
4943 * Decode GETATTR response
4944 */
4945 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4946 {
4947 struct xdr_stream xdr;
4948 struct compound_hdr hdr;
4949 int status;
4950
4951 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4952 status = decode_compound_hdr(&xdr, &hdr);
4953 if (status)
4954 goto out;
4955 status = decode_sequence(&xdr, &res->seq_res, rqstp);
4956 if (status)
4957 goto out;
4958 status = decode_putfh(&xdr);
4959 if (status)
4960 goto out;
4961 status = decode_getfattr(&xdr, res->fattr, res->server,
4962 !RPC_IS_ASYNC(rqstp->rq_task));
4963 out:
4964 return status;
4965 }
4966
4967 /*
4968 * Encode an SETACL request
4969 */
4970 static int
4971 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4972 {
4973 struct xdr_stream xdr;
4974 struct compound_hdr hdr = {
4975 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4976 };
4977 int status;
4978
4979 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4980 encode_compound_hdr(&xdr, req, &hdr);
4981 encode_sequence(&xdr, &args->seq_args, &hdr);
4982 encode_putfh(&xdr, args->fh, &hdr);
4983 status = encode_setacl(&xdr, args, &hdr);
4984 encode_nops(&hdr);
4985 return status;
4986 }
4987
4988 /*
4989 * Decode SETACL response
4990 */
4991 static int
4992 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4993 struct nfs_setaclres *res)
4994 {
4995 struct xdr_stream xdr;
4996 struct compound_hdr hdr;
4997 int status;
4998
4999 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5000 status = decode_compound_hdr(&xdr, &hdr);
5001 if (status)
5002 goto out;
5003 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5004 if (status)
5005 goto out;
5006 status = decode_putfh(&xdr);
5007 if (status)
5008 goto out;
5009 status = decode_setattr(&xdr);
5010 out:
5011 return status;
5012 }
5013
5014 /*
5015 * Decode GETACL response
5016 */
5017 static int
5018 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5019 struct nfs_getaclres *res)
5020 {
5021 struct xdr_stream xdr;
5022 struct compound_hdr hdr;
5023 int status;
5024
5025 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5026 status = decode_compound_hdr(&xdr, &hdr);
5027 if (status)
5028 goto out;
5029 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5030 if (status)
5031 goto out;
5032 status = decode_putfh(&xdr);
5033 if (status)
5034 goto out;
5035 status = decode_getacl(&xdr, rqstp, &res->acl_len);
5036
5037 out:
5038 return status;
5039 }
5040
5041 /*
5042 * Decode CLOSE response
5043 */
5044 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5045 {
5046 struct xdr_stream xdr;
5047 struct compound_hdr hdr;
5048 int status;
5049
5050 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5051 status = decode_compound_hdr(&xdr, &hdr);
5052 if (status)
5053 goto out;
5054 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5055 if (status)
5056 goto out;
5057 status = decode_putfh(&xdr);
5058 if (status)
5059 goto out;
5060 status = decode_close(&xdr, res);
5061 if (status != 0)
5062 goto out;
5063 /*
5064 * Note: Server may do delete on close for this file
5065 * in which case the getattr call will fail with
5066 * an ESTALE error. Shouldn't be a problem,
5067 * though, since fattr->valid will remain unset.
5068 */
5069 decode_getfattr(&xdr, res->fattr, res->server,
5070 !RPC_IS_ASYNC(rqstp->rq_task));
5071 out:
5072 return status;
5073 }
5074
5075 /*
5076 * Decode OPEN response
5077 */
5078 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5079 {
5080 struct xdr_stream xdr;
5081 struct compound_hdr hdr;
5082 int status;
5083
5084 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5085 status = decode_compound_hdr(&xdr, &hdr);
5086 if (status)
5087 goto out;
5088 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5089 if (status)
5090 goto out;
5091 status = decode_putfh(&xdr);
5092 if (status)
5093 goto out;
5094 status = decode_savefh(&xdr);
5095 if (status)
5096 goto out;
5097 status = decode_open(&xdr, res);
5098 if (status)
5099 goto out;
5100 if (decode_getfh(&xdr, &res->fh) != 0)
5101 goto out;
5102 if (decode_getfattr(&xdr, res->f_attr, res->server,
5103 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5104 goto out;
5105 if (decode_restorefh(&xdr) != 0)
5106 goto out;
5107 decode_getfattr(&xdr, res->dir_attr, res->server,
5108 !RPC_IS_ASYNC(rqstp->rq_task));
5109 out:
5110 return status;
5111 }
5112
5113 /*
5114 * Decode OPEN_CONFIRM response
5115 */
5116 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5117 {
5118 struct xdr_stream xdr;
5119 struct compound_hdr hdr;
5120 int status;
5121
5122 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5123 status = decode_compound_hdr(&xdr, &hdr);
5124 if (status)
5125 goto out;
5126 status = decode_putfh(&xdr);
5127 if (status)
5128 goto out;
5129 status = decode_open_confirm(&xdr, res);
5130 out:
5131 return status;
5132 }
5133
5134 /*
5135 * Decode OPEN response
5136 */
5137 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5138 {
5139 struct xdr_stream xdr;
5140 struct compound_hdr hdr;
5141 int status;
5142
5143 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5144 status = decode_compound_hdr(&xdr, &hdr);
5145 if (status)
5146 goto out;
5147 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5148 if (status)
5149 goto out;
5150 status = decode_putfh(&xdr);
5151 if (status)
5152 goto out;
5153 status = decode_open(&xdr, res);
5154 if (status)
5155 goto out;
5156 decode_getfattr(&xdr, res->f_attr, res->server,
5157 !RPC_IS_ASYNC(rqstp->rq_task));
5158 out:
5159 return status;
5160 }
5161
5162 /*
5163 * Decode SETATTR response
5164 */
5165 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5166 {
5167 struct xdr_stream xdr;
5168 struct compound_hdr hdr;
5169 int status;
5170
5171 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5172 status = decode_compound_hdr(&xdr, &hdr);
5173 if (status)
5174 goto out;
5175 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5176 if (status)
5177 goto out;
5178 status = decode_putfh(&xdr);
5179 if (status)
5180 goto out;
5181 status = decode_setattr(&xdr);
5182 if (status)
5183 goto out;
5184 decode_getfattr(&xdr, res->fattr, res->server,
5185 !RPC_IS_ASYNC(rqstp->rq_task));
5186 out:
5187 return status;
5188 }
5189
5190 /*
5191 * Decode LOCK response
5192 */
5193 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5194 {
5195 struct xdr_stream xdr;
5196 struct compound_hdr hdr;
5197 int status;
5198
5199 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5200 status = decode_compound_hdr(&xdr, &hdr);
5201 if (status)
5202 goto out;
5203 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5204 if (status)
5205 goto out;
5206 status = decode_putfh(&xdr);
5207 if (status)
5208 goto out;
5209 status = decode_lock(&xdr, res);
5210 out:
5211 return status;
5212 }
5213
5214 /*
5215 * Decode LOCKT response
5216 */
5217 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5218 {
5219 struct xdr_stream xdr;
5220 struct compound_hdr hdr;
5221 int status;
5222
5223 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5224 status = decode_compound_hdr(&xdr, &hdr);
5225 if (status)
5226 goto out;
5227 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5228 if (status)
5229 goto out;
5230 status = decode_putfh(&xdr);
5231 if (status)
5232 goto out;
5233 status = decode_lockt(&xdr, res);
5234 out:
5235 return status;
5236 }
5237
5238 /*
5239 * Decode LOCKU response
5240 */
5241 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5242 {
5243 struct xdr_stream xdr;
5244 struct compound_hdr hdr;
5245 int status;
5246
5247 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5248 status = decode_compound_hdr(&xdr, &hdr);
5249 if (status)
5250 goto out;
5251 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5252 if (status)
5253 goto out;
5254 status = decode_putfh(&xdr);
5255 if (status)
5256 goto out;
5257 status = decode_locku(&xdr, res);
5258 out:
5259 return status;
5260 }
5261
5262 /*
5263 * Decode READLINK response
5264 */
5265 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5266 struct nfs4_readlink_res *res)
5267 {
5268 struct xdr_stream xdr;
5269 struct compound_hdr hdr;
5270 int status;
5271
5272 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5273 status = decode_compound_hdr(&xdr, &hdr);
5274 if (status)
5275 goto out;
5276 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5277 if (status)
5278 goto out;
5279 status = decode_putfh(&xdr);
5280 if (status)
5281 goto out;
5282 status = decode_readlink(&xdr, rqstp);
5283 out:
5284 return status;
5285 }
5286
5287 /*
5288 * Decode READDIR response
5289 */
5290 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5291 {
5292 struct xdr_stream xdr;
5293 struct compound_hdr hdr;
5294 int status;
5295
5296 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5297 status = decode_compound_hdr(&xdr, &hdr);
5298 if (status)
5299 goto out;
5300 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5301 if (status)
5302 goto out;
5303 status = decode_putfh(&xdr);
5304 if (status)
5305 goto out;
5306 status = decode_readdir(&xdr, rqstp, res);
5307 out:
5308 return status;
5309 }
5310
5311 /*
5312 * Decode Read response
5313 */
5314 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5315 {
5316 struct xdr_stream xdr;
5317 struct compound_hdr hdr;
5318 int status;
5319
5320 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5321 status = decode_compound_hdr(&xdr, &hdr);
5322 if (status)
5323 goto out;
5324 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5325 if (status)
5326 goto out;
5327 status = decode_putfh(&xdr);
5328 if (status)
5329 goto out;
5330 status = decode_read(&xdr, rqstp, res);
5331 if (!status)
5332 status = res->count;
5333 out:
5334 return status;
5335 }
5336
5337 /*
5338 * Decode WRITE response
5339 */
5340 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5341 {
5342 struct xdr_stream xdr;
5343 struct compound_hdr hdr;
5344 int status;
5345
5346 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5347 status = decode_compound_hdr(&xdr, &hdr);
5348 if (status)
5349 goto out;
5350 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5351 if (status)
5352 goto out;
5353 status = decode_putfh(&xdr);
5354 if (status)
5355 goto out;
5356 status = decode_write(&xdr, res);
5357 if (status)
5358 goto out;
5359 decode_getfattr(&xdr, res->fattr, res->server,
5360 !RPC_IS_ASYNC(rqstp->rq_task));
5361 if (!status)
5362 status = res->count;
5363 out:
5364 return status;
5365 }
5366
5367 /*
5368 * Decode COMMIT response
5369 */
5370 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5371 {
5372 struct xdr_stream xdr;
5373 struct compound_hdr hdr;
5374 int status;
5375
5376 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5377 status = decode_compound_hdr(&xdr, &hdr);
5378 if (status)
5379 goto out;
5380 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5381 if (status)
5382 goto out;
5383 status = decode_putfh(&xdr);
5384 if (status)
5385 goto out;
5386 status = decode_commit(&xdr, res);
5387 if (status)
5388 goto out;
5389 decode_getfattr(&xdr, res->fattr, res->server,
5390 !RPC_IS_ASYNC(rqstp->rq_task));
5391 out:
5392 return status;
5393 }
5394
5395 /*
5396 * Decode FSINFO response
5397 */
5398 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5399 struct nfs4_fsinfo_res *res)
5400 {
5401 struct xdr_stream xdr;
5402 struct compound_hdr hdr;
5403 int status;
5404
5405 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5406 status = decode_compound_hdr(&xdr, &hdr);
5407 if (!status)
5408 status = decode_sequence(&xdr, &res->seq_res, req);
5409 if (!status)
5410 status = decode_putfh(&xdr);
5411 if (!status)
5412 status = decode_fsinfo(&xdr, res->fsinfo);
5413 return status;
5414 }
5415
5416 /*
5417 * Decode PATHCONF response
5418 */
5419 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5420 struct nfs4_pathconf_res *res)
5421 {
5422 struct xdr_stream xdr;
5423 struct compound_hdr hdr;
5424 int status;
5425
5426 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5427 status = decode_compound_hdr(&xdr, &hdr);
5428 if (!status)
5429 status = decode_sequence(&xdr, &res->seq_res, req);
5430 if (!status)
5431 status = decode_putfh(&xdr);
5432 if (!status)
5433 status = decode_pathconf(&xdr, res->pathconf);
5434 return status;
5435 }
5436
5437 /*
5438 * Decode STATFS response
5439 */
5440 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5441 struct nfs4_statfs_res *res)
5442 {
5443 struct xdr_stream xdr;
5444 struct compound_hdr hdr;
5445 int status;
5446
5447 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5448 status = decode_compound_hdr(&xdr, &hdr);
5449 if (!status)
5450 status = decode_sequence(&xdr, &res->seq_res, req);
5451 if (!status)
5452 status = decode_putfh(&xdr);
5453 if (!status)
5454 status = decode_statfs(&xdr, res->fsstat);
5455 return status;
5456 }
5457
5458 /*
5459 * Decode GETATTR_BITMAP response
5460 */
5461 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5462 {
5463 struct xdr_stream xdr;
5464 struct compound_hdr hdr;
5465 int status;
5466
5467 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5468 status = decode_compound_hdr(&xdr, &hdr);
5469 if (status)
5470 goto out;
5471 status = decode_sequence(&xdr, &res->seq_res, req);
5472 if (status)
5473 goto out;
5474 if ((status = decode_putfh(&xdr)) != 0)
5475 goto out;
5476 status = decode_server_caps(&xdr, res);
5477 out:
5478 return status;
5479 }
5480
5481 /*
5482 * Decode RENEW response
5483 */
5484 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5485 {
5486 struct xdr_stream xdr;
5487 struct compound_hdr hdr;
5488 int status;
5489
5490 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5491 status = decode_compound_hdr(&xdr, &hdr);
5492 if (!status)
5493 status = decode_renew(&xdr);
5494 return status;
5495 }
5496
5497 /*
5498 * Decode SETCLIENTID response
5499 */
5500 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5501 struct nfs_client *clp)
5502 {
5503 struct xdr_stream xdr;
5504 struct compound_hdr hdr;
5505 int status;
5506
5507 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5508 status = decode_compound_hdr(&xdr, &hdr);
5509 if (!status)
5510 status = decode_setclientid(&xdr, clp);
5511 return status;
5512 }
5513
5514 /*
5515 * Decode SETCLIENTID_CONFIRM response
5516 */
5517 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5518 {
5519 struct xdr_stream xdr;
5520 struct compound_hdr hdr;
5521 int status;
5522
5523 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5524 status = decode_compound_hdr(&xdr, &hdr);
5525 if (!status)
5526 status = decode_setclientid_confirm(&xdr);
5527 if (!status)
5528 status = decode_putrootfh(&xdr);
5529 if (!status)
5530 status = decode_fsinfo(&xdr, fsinfo);
5531 return status;
5532 }
5533
5534 /*
5535 * Decode DELEGRETURN response
5536 */
5537 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5538 {
5539 struct xdr_stream xdr;
5540 struct compound_hdr hdr;
5541 int status;
5542
5543 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5544 status = decode_compound_hdr(&xdr, &hdr);
5545 if (status)
5546 goto out;
5547 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5548 if (status)
5549 goto out;
5550 status = decode_putfh(&xdr);
5551 if (status != 0)
5552 goto out;
5553 status = decode_delegreturn(&xdr);
5554 if (status != 0)
5555 goto out;
5556 decode_getfattr(&xdr, res->fattr, res->server,
5557 !RPC_IS_ASYNC(rqstp->rq_task));
5558 out:
5559 return status;
5560 }
5561
5562 /*
5563 * Decode FS_LOCATIONS response
5564 */
5565 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5566 struct nfs4_fs_locations_res *res)
5567 {
5568 struct xdr_stream xdr;
5569 struct compound_hdr hdr;
5570 int status;
5571
5572 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5573 status = decode_compound_hdr(&xdr, &hdr);
5574 if (status)
5575 goto out;
5576 status = decode_sequence(&xdr, &res->seq_res, req);
5577 if (status)
5578 goto out;
5579 if ((status = decode_putfh(&xdr)) != 0)
5580 goto out;
5581 if ((status = decode_lookup(&xdr)) != 0)
5582 goto out;
5583 xdr_enter_page(&xdr, PAGE_SIZE);
5584 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5585 res->fs_locations->server,
5586 !RPC_IS_ASYNC(req->rq_task));
5587 out:
5588 return status;
5589 }
5590
5591 #if defined(CONFIG_NFS_V4_1)
5592 /*
5593 * Decode EXCHANGE_ID response
5594 */
5595 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5596 void *res)
5597 {
5598 struct xdr_stream xdr;
5599 struct compound_hdr hdr;
5600 int status;
5601
5602 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5603 status = decode_compound_hdr(&xdr, &hdr);
5604 if (!status)
5605 status = decode_exchange_id(&xdr, res);
5606 return status;
5607 }
5608
5609 /*
5610 * Decode CREATE_SESSION response
5611 */
5612 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5613 struct nfs41_create_session_res *res)
5614 {
5615 struct xdr_stream xdr;
5616 struct compound_hdr hdr;
5617 int status;
5618
5619 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5620 status = decode_compound_hdr(&xdr, &hdr);
5621 if (!status)
5622 status = decode_create_session(&xdr, res);
5623 return status;
5624 }
5625
5626 /*
5627 * Decode DESTROY_SESSION response
5628 */
5629 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5630 void *dummy)
5631 {
5632 struct xdr_stream xdr;
5633 struct compound_hdr hdr;
5634 int status;
5635
5636 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5637 status = decode_compound_hdr(&xdr, &hdr);
5638 if (!status)
5639 status = decode_destroy_session(&xdr, dummy);
5640 return status;
5641 }
5642
5643 /*
5644 * Decode SEQUENCE response
5645 */
5646 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5647 struct nfs4_sequence_res *res)
5648 {
5649 struct xdr_stream xdr;
5650 struct compound_hdr hdr;
5651 int status;
5652
5653 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5654 status = decode_compound_hdr(&xdr, &hdr);
5655 if (!status)
5656 status = decode_sequence(&xdr, res, rqstp);
5657 return status;
5658 }
5659
5660 /*
5661 * Decode GET_LEASE_TIME response
5662 */
5663 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5664 struct nfs4_get_lease_time_res *res)
5665 {
5666 struct xdr_stream xdr;
5667 struct compound_hdr hdr;
5668 int status;
5669
5670 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5671 status = decode_compound_hdr(&xdr, &hdr);
5672 if (!status)
5673 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5674 if (!status)
5675 status = decode_putrootfh(&xdr);
5676 if (!status)
5677 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5678 return status;
5679 }
5680
5681 /*
5682 * Decode RECLAIM_COMPLETE response
5683 */
5684 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5685 struct nfs41_reclaim_complete_res *res)
5686 {
5687 struct xdr_stream xdr;
5688 struct compound_hdr hdr;
5689 int status;
5690
5691 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5692 status = decode_compound_hdr(&xdr, &hdr);
5693 if (!status)
5694 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5695 if (!status)
5696 status = decode_reclaim_complete(&xdr, (void *)NULL);
5697 return status;
5698 }
5699 #endif /* CONFIG_NFS_V4_1 */
5700
5701 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5702 {
5703 uint32_t bitmap[2] = {0};
5704 uint32_t len;
5705
5706 if (!*p++) {
5707 if (!*p)
5708 return ERR_PTR(-EAGAIN);
5709 entry->eof = 1;
5710 return ERR_PTR(-EBADCOOKIE);
5711 }
5712
5713 entry->prev_cookie = entry->cookie;
5714 p = xdr_decode_hyper(p, &entry->cookie);
5715 entry->len = ntohl(*p++);
5716 entry->name = (const char *) p;
5717 p += XDR_QUADLEN(entry->len);
5718
5719 /*
5720 * In case the server doesn't return an inode number,
5721 * we fake one here. (We don't use inode number 0,
5722 * since glibc seems to choke on it...)
5723 */
5724 entry->ino = 1;
5725
5726 len = ntohl(*p++); /* bitmap length */
5727 if (len-- > 0) {
5728 bitmap[0] = ntohl(*p++);
5729 if (len-- > 0) {
5730 bitmap[1] = ntohl(*p++);
5731 p += len;
5732 }
5733 }
5734 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5735 if (len > 0) {
5736 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5737 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5738 /* Ignore the return value of rdattr_error for now */
5739 p++;
5740 len--;
5741 }
5742 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5743 xdr_decode_hyper(p, &entry->ino);
5744 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5745 xdr_decode_hyper(p, &entry->ino);
5746 p += len;
5747 }
5748
5749 entry->eof = !p[0] && p[1];
5750 return p;
5751 }
5752
5753 /*
5754 * We need to translate between nfs status return values and
5755 * the local errno values which may not be the same.
5756 */
5757 static struct {
5758 int stat;
5759 int errno;
5760 } nfs_errtbl[] = {
5761 { NFS4_OK, 0 },
5762 { NFS4ERR_PERM, -EPERM },
5763 { NFS4ERR_NOENT, -ENOENT },
5764 { NFS4ERR_IO, -errno_NFSERR_IO},
5765 { NFS4ERR_NXIO, -ENXIO },
5766 { NFS4ERR_ACCESS, -EACCES },
5767 { NFS4ERR_EXIST, -EEXIST },
5768 { NFS4ERR_XDEV, -EXDEV },
5769 { NFS4ERR_NOTDIR, -ENOTDIR },
5770 { NFS4ERR_ISDIR, -EISDIR },
5771 { NFS4ERR_INVAL, -EINVAL },
5772 { NFS4ERR_FBIG, -EFBIG },
5773 { NFS4ERR_NOSPC, -ENOSPC },
5774 { NFS4ERR_ROFS, -EROFS },
5775 { NFS4ERR_MLINK, -EMLINK },
5776 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
5777 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
5778 { NFS4ERR_DQUOT, -EDQUOT },
5779 { NFS4ERR_STALE, -ESTALE },
5780 { NFS4ERR_BADHANDLE, -EBADHANDLE },
5781 { NFS4ERR_BADOWNER, -EINVAL },
5782 { NFS4ERR_BADNAME, -EINVAL },
5783 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
5784 { NFS4ERR_NOTSUPP, -ENOTSUPP },
5785 { NFS4ERR_TOOSMALL, -ETOOSMALL },
5786 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
5787 { NFS4ERR_BADTYPE, -EBADTYPE },
5788 { NFS4ERR_LOCKED, -EAGAIN },
5789 { NFS4ERR_SYMLINK, -ELOOP },
5790 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
5791 { NFS4ERR_DEADLOCK, -EDEADLK },
5792 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
5793 * to be handled by a
5794 * middle-layer.
5795 */
5796 { -1, -EIO }
5797 };
5798
5799 /*
5800 * Convert an NFS error code to a local one.
5801 * This one is used jointly by NFSv2 and NFSv3.
5802 */
5803 static int
5804 nfs4_stat_to_errno(int stat)
5805 {
5806 int i;
5807 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5808 if (nfs_errtbl[i].stat == stat)
5809 return nfs_errtbl[i].errno;
5810 }
5811 if (stat <= 10000 || stat > 10100) {
5812 /* The server is looney tunes. */
5813 return -EREMOTEIO;
5814 }
5815 /* If we cannot translate the error, the recovery routines should
5816 * handle it.
5817 * Note: remaining NFSv4 error codes have values > 10000, so should
5818 * not conflict with native Linux error codes.
5819 */
5820 return -stat;
5821 }
5822
5823 #define PROC(proc, argtype, restype) \
5824 [NFSPROC4_CLNT_##proc] = { \
5825 .p_proc = NFSPROC4_COMPOUND, \
5826 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
5827 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
5828 .p_arglen = NFS4_##argtype##_sz, \
5829 .p_replen = NFS4_##restype##_sz, \
5830 .p_statidx = NFSPROC4_CLNT_##proc, \
5831 .p_name = #proc, \
5832 }
5833
5834 struct rpc_procinfo nfs4_procedures[] = {
5835 PROC(READ, enc_read, dec_read),
5836 PROC(WRITE, enc_write, dec_write),
5837 PROC(COMMIT, enc_commit, dec_commit),
5838 PROC(OPEN, enc_open, dec_open),
5839 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
5840 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
5841 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
5842 PROC(CLOSE, enc_close, dec_close),
5843 PROC(SETATTR, enc_setattr, dec_setattr),
5844 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
5845 PROC(RENEW, enc_renew, dec_renew),
5846 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
5847 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
5848 PROC(LOCK, enc_lock, dec_lock),
5849 PROC(LOCKT, enc_lockt, dec_lockt),
5850 PROC(LOCKU, enc_locku, dec_locku),
5851 PROC(ACCESS, enc_access, dec_access),
5852 PROC(GETATTR, enc_getattr, dec_getattr),
5853 PROC(LOOKUP, enc_lookup, dec_lookup),
5854 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
5855 PROC(REMOVE, enc_remove, dec_remove),
5856 PROC(RENAME, enc_rename, dec_rename),
5857 PROC(LINK, enc_link, dec_link),
5858 PROC(SYMLINK, enc_symlink, dec_symlink),
5859 PROC(CREATE, enc_create, dec_create),
5860 PROC(PATHCONF, enc_pathconf, dec_pathconf),
5861 PROC(STATFS, enc_statfs, dec_statfs),
5862 PROC(READLINK, enc_readlink, dec_readlink),
5863 PROC(READDIR, enc_readdir, dec_readdir),
5864 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
5865 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
5866 PROC(GETACL, enc_getacl, dec_getacl),
5867 PROC(SETACL, enc_setacl, dec_setacl),
5868 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
5869 #if defined(CONFIG_NFS_V4_1)
5870 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
5871 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
5872 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
5873 PROC(SEQUENCE, enc_sequence, dec_sequence),
5874 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
5875 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
5876 #endif /* CONFIG_NFS_V4_1 */
5877 };
5878
5879 struct rpc_version nfs_version4 = {
5880 .number = 4,
5881 .nrprocs = ARRAY_SIZE(nfs4_procedures),
5882 .procs = nfs4_procedures
5883 };
5884
5885 /*
5886 * Local variables:
5887 * c-basic-offset: 8
5888 * End:
5889 */
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