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UBIFS: fix debugging message
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfs / nfs4xdr.c
blobc3ccd2c468344fab9076214fec8d99fc1eee9036
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/sunrpc/gss_api.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55 #include "internal.h"
56 #include "pnfs.h"
57
58 #define NFSDBG_FACILITY NFSDBG_XDR
59
60 /* Mapping from NFS error code to "errno" error code. */
61 #define errno_NFSERR_IO EIO
62
63 static int nfs4_stat_to_errno(int);
64
65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
66 #ifdef DEBUG
67 #define NFS4_MAXTAGLEN 20
68 #else
69 #define NFS4_MAXTAGLEN 0
70 #endif
71
72 /* lock,open owner id:
73 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
74 */
75 #define open_owner_id_maxsz (1 + 1 + 4)
76 #define lock_owner_id_maxsz (1 + 1 + 4)
77 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
78 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
79 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
80 #define op_encode_hdr_maxsz (1)
81 #define op_decode_hdr_maxsz (2)
82 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
84 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
86 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
87 (NFS4_FHSIZE >> 2))
88 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
91 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
92 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
93 ((3+NFS4_FHSIZE) >> 2))
94 #define nfs4_fattr_bitmap_maxsz 3
95 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
96 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
97 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
98 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
100 /* This is based on getfattr, which uses the most attributes: */
101 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
102 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
103 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
104 nfs4_fattr_value_maxsz)
105 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
106 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
107 1 + 2 + 1 + \
108 nfs4_owner_maxsz + \
109 nfs4_group_maxsz + \
110 4 + 4)
111 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
114 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
115 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
116 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 15)
117 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
118 #define decode_renew_maxsz (op_decode_hdr_maxsz)
119 #define encode_setclientid_maxsz \
120 (op_encode_hdr_maxsz + \
121 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
122 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
123 1 /* sc_prog */ + \
124 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
125 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
126 1) /* sc_cb_ident */
127 #define decode_setclientid_maxsz \
128 (op_decode_hdr_maxsz + \
129 2 + \
130 1024) /* large value for CLID_INUSE */
131 #define encode_setclientid_confirm_maxsz \
132 (op_encode_hdr_maxsz + \
133 3 + (NFS4_VERIFIER_SIZE >> 2))
134 #define decode_setclientid_confirm_maxsz \
135 (op_decode_hdr_maxsz)
136 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
137 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
138 #define encode_share_access_maxsz \
139 (2)
140 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
141 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
142 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
143 #define encode_open_maxsz (op_encode_hdr_maxsz + \
144 2 + encode_share_access_maxsz + 2 + \
145 open_owner_id_maxsz + \
146 encode_opentype_maxsz + \
147 encode_claim_null_maxsz)
148 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
149 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
150 decode_ace_maxsz)
151 #define decode_change_info_maxsz (5)
152 #define decode_open_maxsz (op_decode_hdr_maxsz + \
153 decode_stateid_maxsz + \
154 decode_change_info_maxsz + 1 + \
155 nfs4_fattr_bitmap_maxsz + \
156 decode_delegation_maxsz)
157 #define encode_open_confirm_maxsz \
158 (op_encode_hdr_maxsz + \
159 encode_stateid_maxsz + 1)
160 #define decode_open_confirm_maxsz \
161 (op_decode_hdr_maxsz + \
162 decode_stateid_maxsz)
163 #define encode_open_downgrade_maxsz \
164 (op_encode_hdr_maxsz + \
165 encode_stateid_maxsz + 1 + \
166 encode_share_access_maxsz)
167 #define decode_open_downgrade_maxsz \
168 (op_decode_hdr_maxsz + \
169 decode_stateid_maxsz)
170 #define encode_close_maxsz (op_encode_hdr_maxsz + \
171 1 + encode_stateid_maxsz)
172 #define decode_close_maxsz (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz)
174 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
175 encode_stateid_maxsz + \
176 encode_attrs_maxsz)
177 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
178 nfs4_fattr_bitmap_maxsz)
179 #define encode_read_maxsz (op_encode_hdr_maxsz + \
180 encode_stateid_maxsz + 3)
181 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
182 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
183 2 + encode_verifier_maxsz + 5)
184 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
185 decode_verifier_maxsz)
186 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
187 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
188 #define encode_write_maxsz (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 4)
190 #define decode_write_maxsz (op_decode_hdr_maxsz + \
191 2 + decode_verifier_maxsz)
192 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
193 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
194 decode_verifier_maxsz)
195 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
196 nfs4_name_maxsz)
197 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
198 decode_change_info_maxsz)
199 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
200 2 * nfs4_name_maxsz)
201 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
202 decode_change_info_maxsz + \
203 decode_change_info_maxsz)
204 #define encode_link_maxsz (op_encode_hdr_maxsz + \
205 nfs4_name_maxsz)
206 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
207 #define encode_lockowner_maxsz (7)
208 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
209 7 + \
210 1 + encode_stateid_maxsz + 1 + \
211 encode_lockowner_maxsz)
212 #define decode_lock_denied_maxsz \
213 (8 + decode_lockowner_maxsz)
214 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
215 decode_lock_denied_maxsz)
216 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
217 encode_lockowner_maxsz)
218 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
219 decode_lock_denied_maxsz)
220 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
221 encode_stateid_maxsz + \
222 4)
223 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
224 decode_stateid_maxsz)
225 #define encode_release_lockowner_maxsz \
226 (op_encode_hdr_maxsz + \
227 encode_lockowner_maxsz)
228 #define decode_release_lockowner_maxsz \
229 (op_decode_hdr_maxsz)
230 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
231 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
232 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
233 1 + nfs4_name_maxsz + \
234 1 + \
235 nfs4_fattr_maxsz)
236 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
237 #define encode_create_maxsz (op_encode_hdr_maxsz + \
238 1 + 2 + nfs4_name_maxsz + \
239 encode_attrs_maxsz)
240 #define decode_create_maxsz (op_decode_hdr_maxsz + \
241 decode_change_info_maxsz + \
242 nfs4_fattr_bitmap_maxsz)
243 #define encode_statfs_maxsz (encode_getattr_maxsz)
244 #define decode_statfs_maxsz (decode_getattr_maxsz)
245 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
246 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
247 #define encode_getacl_maxsz (encode_getattr_maxsz)
248 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
249 nfs4_fattr_bitmap_maxsz + 1)
250 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
251 encode_stateid_maxsz + 3)
252 #define decode_setacl_maxsz (decode_setattr_maxsz)
253 #define encode_fs_locations_maxsz \
254 (encode_getattr_maxsz)
255 #define decode_fs_locations_maxsz \
256 (0)
257 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
258 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))
259
260 #if defined(CONFIG_NFS_V4_1)
261 #define NFS4_MAX_MACHINE_NAME_LEN (64)
262
263 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
264 encode_verifier_maxsz + \
265 1 /* co_ownerid.len */ + \
266 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
267 1 /* flags */ + \
268 1 /* spa_how */ + \
269 0 /* SP4_NONE (for now) */ + \
270 1 /* zero implemetation id array */)
271 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
272 2 /* eir_clientid */ + \
273 1 /* eir_sequenceid */ + \
274 1 /* eir_flags */ + \
275 1 /* spr_how */ + \
276 0 /* SP4_NONE (for now) */ + \
277 2 /* eir_server_owner.so_minor_id */ + \
278 /* eir_server_owner.so_major_id<> */ \
279 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
280 /* eir_server_scope<> */ \
281 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
282 1 /* eir_server_impl_id array length */ + \
283 0 /* ignored eir_server_impl_id contents */)
284 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
285 #define decode_channel_attrs_maxsz (6 + \
286 1 /* ca_rdma_ird.len */ + \
287 1 /* ca_rdma_ird */)
288 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
289 2 /* csa_clientid */ + \
290 1 /* csa_sequence */ + \
291 1 /* csa_flags */ + \
292 encode_channel_attrs_maxsz + \
293 encode_channel_attrs_maxsz + \
294 1 /* csa_cb_program */ + \
295 1 /* csa_sec_parms.len (1) */ + \
296 1 /* cb_secflavor (AUTH_SYS) */ + \
297 1 /* stamp */ + \
298 1 /* machinename.len */ + \
299 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
300 1 /* uid */ + \
301 1 /* gid */ + \
302 1 /* gids.len (0) */)
303 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
304 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
305 1 /* csr_sequence */ + \
306 1 /* csr_flags */ + \
307 decode_channel_attrs_maxsz + \
308 decode_channel_attrs_maxsz)
309 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
310 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
311 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
312 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
313 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
314 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
315 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
316 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
317 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
318 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
319 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
320 1 /* layout type */ + \
321 1 /* opaque devaddr4 length */ + \
322 /* devaddr4 payload is read into page */ \
323 1 /* notification bitmap length */ + \
324 1 /* notification bitmap */)
325 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
326 encode_stateid_maxsz)
327 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
328 decode_stateid_maxsz + \
329 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
330 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
331 2 /* offset */ + \
332 2 /* length */ + \
333 1 /* reclaim */ + \
334 encode_stateid_maxsz + \
335 1 /* new offset (true) */ + \
336 2 /* last byte written */ + \
337 1 /* nt_timechanged (false) */ + \
338 1 /* layoutupdate4 layout type */ + \
339 1 /* NULL filelayout layoutupdate4 payload */)
340 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
341
342 #else /* CONFIG_NFS_V4_1 */
343 #define encode_sequence_maxsz 0
344 #define decode_sequence_maxsz 0
345 #endif /* CONFIG_NFS_V4_1 */
346
347 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
348 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
349 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
350 encode_sequence_maxsz + \
351 encode_putfh_maxsz + \
352 encode_read_maxsz)
353 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
354 decode_sequence_maxsz + \
355 decode_putfh_maxsz + \
356 decode_read_maxsz)
357 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
358 encode_sequence_maxsz + \
359 encode_putfh_maxsz + \
360 encode_readlink_maxsz)
361 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
362 decode_sequence_maxsz + \
363 decode_putfh_maxsz + \
364 decode_readlink_maxsz)
365 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
366 encode_sequence_maxsz + \
367 encode_putfh_maxsz + \
368 encode_readdir_maxsz)
369 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
370 decode_sequence_maxsz + \
371 decode_putfh_maxsz + \
372 decode_readdir_maxsz)
373 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
374 encode_sequence_maxsz + \
375 encode_putfh_maxsz + \
376 encode_write_maxsz + \
377 encode_getattr_maxsz)
378 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
379 decode_sequence_maxsz + \
380 decode_putfh_maxsz + \
381 decode_write_maxsz + \
382 decode_getattr_maxsz)
383 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
384 encode_sequence_maxsz + \
385 encode_putfh_maxsz + \
386 encode_commit_maxsz + \
387 encode_getattr_maxsz)
388 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
389 decode_sequence_maxsz + \
390 decode_putfh_maxsz + \
391 decode_commit_maxsz + \
392 decode_getattr_maxsz)
393 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
394 encode_sequence_maxsz + \
395 encode_putfh_maxsz + \
396 encode_savefh_maxsz + \
397 encode_open_maxsz + \
398 encode_getfh_maxsz + \
399 encode_getattr_maxsz + \
400 encode_restorefh_maxsz + \
401 encode_getattr_maxsz)
402 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
403 decode_sequence_maxsz + \
404 decode_putfh_maxsz + \
405 decode_savefh_maxsz + \
406 decode_open_maxsz + \
407 decode_getfh_maxsz + \
408 decode_getattr_maxsz + \
409 decode_restorefh_maxsz + \
410 decode_getattr_maxsz)
411 #define NFS4_enc_open_confirm_sz \
412 (compound_encode_hdr_maxsz + \
413 encode_putfh_maxsz + \
414 encode_open_confirm_maxsz)
415 #define NFS4_dec_open_confirm_sz \
416 (compound_decode_hdr_maxsz + \
417 decode_putfh_maxsz + \
418 decode_open_confirm_maxsz)
419 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
420 encode_sequence_maxsz + \
421 encode_putfh_maxsz + \
422 encode_open_maxsz + \
423 encode_getattr_maxsz)
424 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
425 decode_sequence_maxsz + \
426 decode_putfh_maxsz + \
427 decode_open_maxsz + \
428 decode_getattr_maxsz)
429 #define NFS4_enc_open_downgrade_sz \
430 (compound_encode_hdr_maxsz + \
431 encode_sequence_maxsz + \
432 encode_putfh_maxsz + \
433 encode_open_downgrade_maxsz + \
434 encode_getattr_maxsz)
435 #define NFS4_dec_open_downgrade_sz \
436 (compound_decode_hdr_maxsz + \
437 decode_sequence_maxsz + \
438 decode_putfh_maxsz + \
439 decode_open_downgrade_maxsz + \
440 decode_getattr_maxsz)
441 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_close_maxsz + \
445 encode_getattr_maxsz)
446 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
447 decode_sequence_maxsz + \
448 decode_putfh_maxsz + \
449 decode_close_maxsz + \
450 decode_getattr_maxsz)
451 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
452 encode_sequence_maxsz + \
453 encode_putfh_maxsz + \
454 encode_setattr_maxsz + \
455 encode_getattr_maxsz)
456 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
457 decode_sequence_maxsz + \
458 decode_putfh_maxsz + \
459 decode_setattr_maxsz + \
460 decode_getattr_maxsz)
461 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
462 encode_sequence_maxsz + \
463 encode_putfh_maxsz + \
464 encode_fsinfo_maxsz)
465 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
466 decode_sequence_maxsz + \
467 decode_putfh_maxsz + \
468 decode_fsinfo_maxsz)
469 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
470 encode_renew_maxsz)
471 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
472 decode_renew_maxsz)
473 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
474 encode_setclientid_maxsz)
475 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
476 decode_setclientid_maxsz)
477 #define NFS4_enc_setclientid_confirm_sz \
478 (compound_encode_hdr_maxsz + \
479 encode_setclientid_confirm_maxsz + \
480 encode_putrootfh_maxsz + \
481 encode_fsinfo_maxsz)
482 #define NFS4_dec_setclientid_confirm_sz \
483 (compound_decode_hdr_maxsz + \
484 decode_setclientid_confirm_maxsz + \
485 decode_putrootfh_maxsz + \
486 decode_fsinfo_maxsz)
487 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
488 encode_sequence_maxsz + \
489 encode_putfh_maxsz + \
490 encode_lock_maxsz)
491 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_lock_maxsz)
495 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
496 encode_sequence_maxsz + \
497 encode_putfh_maxsz + \
498 encode_lockt_maxsz)
499 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
500 decode_sequence_maxsz + \
501 decode_putfh_maxsz + \
502 decode_lockt_maxsz)
503 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
504 encode_sequence_maxsz + \
505 encode_putfh_maxsz + \
506 encode_locku_maxsz)
507 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
508 decode_sequence_maxsz + \
509 decode_putfh_maxsz + \
510 decode_locku_maxsz)
511 #define NFS4_enc_release_lockowner_sz \
512 (compound_encode_hdr_maxsz + \
513 encode_lockowner_maxsz)
514 #define NFS4_dec_release_lockowner_sz \
515 (compound_decode_hdr_maxsz + \
516 decode_lockowner_maxsz)
517 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_access_maxsz + \
521 encode_getattr_maxsz)
522 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
523 decode_sequence_maxsz + \
524 decode_putfh_maxsz + \
525 decode_access_maxsz + \
526 decode_getattr_maxsz)
527 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_getattr_maxsz)
531 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
532 decode_sequence_maxsz + \
533 decode_putfh_maxsz + \
534 decode_getattr_maxsz)
535 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
536 encode_sequence_maxsz + \
537 encode_putfh_maxsz + \
538 encode_lookup_maxsz + \
539 encode_getattr_maxsz + \
540 encode_getfh_maxsz)
541 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
542 decode_sequence_maxsz + \
543 decode_putfh_maxsz + \
544 decode_lookup_maxsz + \
545 decode_getattr_maxsz + \
546 decode_getfh_maxsz)
547 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
548 encode_sequence_maxsz + \
549 encode_putrootfh_maxsz + \
550 encode_getattr_maxsz + \
551 encode_getfh_maxsz)
552 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
553 decode_sequence_maxsz + \
554 decode_putrootfh_maxsz + \
555 decode_getattr_maxsz + \
556 decode_getfh_maxsz)
557 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_remove_maxsz + \
561 encode_getattr_maxsz)
562 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
563 decode_sequence_maxsz + \
564 decode_putfh_maxsz + \
565 decode_remove_maxsz + \
566 decode_getattr_maxsz)
567 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
568 encode_sequence_maxsz + \
569 encode_putfh_maxsz + \
570 encode_savefh_maxsz + \
571 encode_putfh_maxsz + \
572 encode_rename_maxsz + \
573 encode_getattr_maxsz + \
574 encode_restorefh_maxsz + \
575 encode_getattr_maxsz)
576 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
577 decode_sequence_maxsz + \
578 decode_putfh_maxsz + \
579 decode_savefh_maxsz + \
580 decode_putfh_maxsz + \
581 decode_rename_maxsz + \
582 decode_getattr_maxsz + \
583 decode_restorefh_maxsz + \
584 decode_getattr_maxsz)
585 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putfh_maxsz + \
588 encode_savefh_maxsz + \
589 encode_putfh_maxsz + \
590 encode_link_maxsz + \
591 decode_getattr_maxsz + \
592 encode_restorefh_maxsz + \
593 decode_getattr_maxsz)
594 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_savefh_maxsz + \
598 decode_putfh_maxsz + \
599 decode_link_maxsz + \
600 decode_getattr_maxsz + \
601 decode_restorefh_maxsz + \
602 decode_getattr_maxsz)
603 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
604 encode_sequence_maxsz + \
605 encode_putfh_maxsz + \
606 encode_symlink_maxsz + \
607 encode_getattr_maxsz + \
608 encode_getfh_maxsz)
609 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
610 decode_sequence_maxsz + \
611 decode_putfh_maxsz + \
612 decode_symlink_maxsz + \
613 decode_getattr_maxsz + \
614 decode_getfh_maxsz)
615 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
616 encode_sequence_maxsz + \
617 encode_putfh_maxsz + \
618 encode_savefh_maxsz + \
619 encode_create_maxsz + \
620 encode_getfh_maxsz + \
621 encode_getattr_maxsz + \
622 encode_restorefh_maxsz + \
623 encode_getattr_maxsz)
624 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
625 decode_sequence_maxsz + \
626 decode_putfh_maxsz + \
627 decode_savefh_maxsz + \
628 decode_create_maxsz + \
629 decode_getfh_maxsz + \
630 decode_getattr_maxsz + \
631 decode_restorefh_maxsz + \
632 decode_getattr_maxsz)
633 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
634 encode_sequence_maxsz + \
635 encode_putfh_maxsz + \
636 encode_getattr_maxsz)
637 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
638 decode_sequence_maxsz + \
639 decode_putfh_maxsz + \
640 decode_getattr_maxsz)
641 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
642 encode_sequence_maxsz + \
643 encode_putfh_maxsz + \
644 encode_statfs_maxsz)
645 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
646 decode_sequence_maxsz + \
647 decode_putfh_maxsz + \
648 decode_statfs_maxsz)
649 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
650 encode_sequence_maxsz + \
651 encode_putfh_maxsz + \
652 encode_getattr_maxsz)
653 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
654 decode_sequence_maxsz + \
655 decode_putfh_maxsz + \
656 decode_getattr_maxsz)
657 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
658 encode_sequence_maxsz + \
659 encode_putfh_maxsz + \
660 encode_delegreturn_maxsz + \
661 encode_getattr_maxsz)
662 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
663 decode_sequence_maxsz + \
664 decode_delegreturn_maxsz + \
665 decode_getattr_maxsz)
666 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
667 encode_sequence_maxsz + \
668 encode_putfh_maxsz + \
669 encode_getacl_maxsz)
670 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
671 decode_sequence_maxsz + \
672 decode_putfh_maxsz + \
673 decode_getacl_maxsz)
674 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
675 encode_sequence_maxsz + \
676 encode_putfh_maxsz + \
677 encode_setacl_maxsz)
678 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
679 decode_sequence_maxsz + \
680 decode_putfh_maxsz + \
681 decode_setacl_maxsz)
682 #define NFS4_enc_fs_locations_sz \
683 (compound_encode_hdr_maxsz + \
684 encode_sequence_maxsz + \
685 encode_putfh_maxsz + \
686 encode_lookup_maxsz + \
687 encode_fs_locations_maxsz)
688 #define NFS4_dec_fs_locations_sz \
689 (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_lookup_maxsz + \
693 decode_fs_locations_maxsz)
694 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
695 encode_sequence_maxsz + \
696 encode_putfh_maxsz + \
697 encode_secinfo_maxsz)
698 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
699 decode_sequence_maxsz + \
700 decode_putfh_maxsz + \
701 decode_secinfo_maxsz)
702 #if defined(CONFIG_NFS_V4_1)
703 #define NFS4_enc_exchange_id_sz \
704 (compound_encode_hdr_maxsz + \
705 encode_exchange_id_maxsz)
706 #define NFS4_dec_exchange_id_sz \
707 (compound_decode_hdr_maxsz + \
708 decode_exchange_id_maxsz)
709 #define NFS4_enc_create_session_sz \
710 (compound_encode_hdr_maxsz + \
711 encode_create_session_maxsz)
712 #define NFS4_dec_create_session_sz \
713 (compound_decode_hdr_maxsz + \
714 decode_create_session_maxsz)
715 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
716 encode_destroy_session_maxsz)
717 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
718 decode_destroy_session_maxsz)
719 #define NFS4_enc_sequence_sz \
720 (compound_decode_hdr_maxsz + \
721 encode_sequence_maxsz)
722 #define NFS4_dec_sequence_sz \
723 (compound_decode_hdr_maxsz + \
724 decode_sequence_maxsz)
725 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putrootfh_maxsz + \
728 encode_fsinfo_maxsz)
729 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putrootfh_maxsz + \
732 decode_fsinfo_maxsz)
733 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_reclaim_complete_maxsz)
736 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
737 decode_sequence_maxsz + \
738 decode_reclaim_complete_maxsz)
739 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
740 encode_sequence_maxsz +\
741 encode_getdeviceinfo_maxsz)
742 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
743 decode_sequence_maxsz + \
744 decode_getdeviceinfo_maxsz)
745 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
746 encode_sequence_maxsz + \
747 encode_putfh_maxsz + \
748 encode_layoutget_maxsz)
749 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_layoutget_maxsz)
753 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
754 encode_sequence_maxsz +\
755 encode_putfh_maxsz + \
756 encode_layoutcommit_maxsz + \
757 encode_getattr_maxsz)
758 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
759 decode_sequence_maxsz + \
760 decode_putfh_maxsz + \
761 decode_layoutcommit_maxsz + \
762 decode_getattr_maxsz)
763
764
765 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
766 compound_encode_hdr_maxsz +
767 encode_sequence_maxsz +
768 encode_putfh_maxsz +
769 encode_getattr_maxsz) *
770 XDR_UNIT);
771
772 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
773 compound_decode_hdr_maxsz +
774 decode_sequence_maxsz +
775 decode_putfh_maxsz) *
776 XDR_UNIT);
777 #endif /* CONFIG_NFS_V4_1 */
778
779 static const umode_t nfs_type2fmt[] = {
780 [NF4BAD] = 0,
781 [NF4REG] = S_IFREG,
782 [NF4DIR] = S_IFDIR,
783 [NF4BLK] = S_IFBLK,
784 [NF4CHR] = S_IFCHR,
785 [NF4LNK] = S_IFLNK,
786 [NF4SOCK] = S_IFSOCK,
787 [NF4FIFO] = S_IFIFO,
788 [NF4ATTRDIR] = 0,
789 [NF4NAMEDATTR] = 0,
790 };
791
792 struct compound_hdr {
793 int32_t status;
794 uint32_t nops;
795 __be32 * nops_p;
796 uint32_t taglen;
797 char * tag;
798 uint32_t replen; /* expected reply words */
799 u32 minorversion;
800 };
801
802 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
803 {
804 __be32 *p = xdr_reserve_space(xdr, nbytes);
805 BUG_ON(!p);
806 return p;
807 }
808
809 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
810 {
811 __be32 *p;
812
813 p = xdr_reserve_space(xdr, 4 + len);
814 BUG_ON(p == NULL);
815 xdr_encode_opaque(p, str, len);
816 }
817
818 static void encode_compound_hdr(struct xdr_stream *xdr,
819 struct rpc_rqst *req,
820 struct compound_hdr *hdr)
821 {
822 __be32 *p;
823 struct rpc_auth *auth = req->rq_cred->cr_auth;
824
825 /* initialize running count of expected bytes in reply.
826 * NOTE: the replied tag SHOULD be the same is the one sent,
827 * but this is not required as a MUST for the server to do so. */
828 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
829
830 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
831 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
832 p = reserve_space(xdr, 4 + hdr->taglen + 8);
833 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
834 *p++ = cpu_to_be32(hdr->minorversion);
835 hdr->nops_p = p;
836 *p = cpu_to_be32(hdr->nops);
837 }
838
839 static void encode_nops(struct compound_hdr *hdr)
840 {
841 BUG_ON(hdr->nops > NFS4_MAX_OPS);
842 *hdr->nops_p = htonl(hdr->nops);
843 }
844
845 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
846 {
847 __be32 *p;
848
849 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
850 BUG_ON(p == NULL);
851 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
852 }
853
854 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
855 {
856 char owner_name[IDMAP_NAMESZ];
857 char owner_group[IDMAP_NAMESZ];
858 int owner_namelen = 0;
859 int owner_grouplen = 0;
860 __be32 *p;
861 __be32 *q;
862 int len;
863 uint32_t bmval0 = 0;
864 uint32_t bmval1 = 0;
865
866 /*
867 * We reserve enough space to write the entire attribute buffer at once.
868 * In the worst-case, this would be
869 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
870 * = 36 bytes, plus any contribution from variable-length fields
871 * such as owner/group.
872 */
873 len = 16;
874
875 /* Sigh */
876 if (iap->ia_valid & ATTR_SIZE)
877 len += 8;
878 if (iap->ia_valid & ATTR_MODE)
879 len += 4;
880 if (iap->ia_valid & ATTR_UID) {
881 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
882 if (owner_namelen < 0) {
883 dprintk("nfs: couldn't resolve uid %d to string\n",
884 iap->ia_uid);
885 /* XXX */
886 strcpy(owner_name, "nobody");
887 owner_namelen = sizeof("nobody") - 1;
888 /* goto out; */
889 }
890 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
891 }
892 if (iap->ia_valid & ATTR_GID) {
893 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
894 if (owner_grouplen < 0) {
895 dprintk("nfs: couldn't resolve gid %d to string\n",
896 iap->ia_gid);
897 strcpy(owner_group, "nobody");
898 owner_grouplen = sizeof("nobody") - 1;
899 /* goto out; */
900 }
901 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
902 }
903 if (iap->ia_valid & ATTR_ATIME_SET)
904 len += 16;
905 else if (iap->ia_valid & ATTR_ATIME)
906 len += 4;
907 if (iap->ia_valid & ATTR_MTIME_SET)
908 len += 16;
909 else if (iap->ia_valid & ATTR_MTIME)
910 len += 4;
911 p = reserve_space(xdr, len);
912
913 /*
914 * We write the bitmap length now, but leave the bitmap and the attribute
915 * buffer length to be backfilled at the end of this routine.
916 */
917 *p++ = cpu_to_be32(2);
918 q = p;
919 p += 3;
920
921 if (iap->ia_valid & ATTR_SIZE) {
922 bmval0 |= FATTR4_WORD0_SIZE;
923 p = xdr_encode_hyper(p, iap->ia_size);
924 }
925 if (iap->ia_valid & ATTR_MODE) {
926 bmval1 |= FATTR4_WORD1_MODE;
927 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
928 }
929 if (iap->ia_valid & ATTR_UID) {
930 bmval1 |= FATTR4_WORD1_OWNER;
931 p = xdr_encode_opaque(p, owner_name, owner_namelen);
932 }
933 if (iap->ia_valid & ATTR_GID) {
934 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
935 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
936 }
937 if (iap->ia_valid & ATTR_ATIME_SET) {
938 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
939 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
940 *p++ = cpu_to_be32(0);
941 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
942 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
943 }
944 else if (iap->ia_valid & ATTR_ATIME) {
945 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
946 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
947 }
948 if (iap->ia_valid & ATTR_MTIME_SET) {
949 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
950 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
951 *p++ = cpu_to_be32(0);
952 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
953 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
954 }
955 else if (iap->ia_valid & ATTR_MTIME) {
956 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
957 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
958 }
959
960 /*
961 * Now we backfill the bitmap and the attribute buffer length.
962 */
963 if (len != ((char *)p - (char *)q) + 4) {
964 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
965 len, ((char *)p - (char *)q) + 4);
966 BUG();
967 }
968 len = (char *)p - (char *)q - 12;
969 *q++ = htonl(bmval0);
970 *q++ = htonl(bmval1);
971 *q = htonl(len);
972
973 /* out: */
974 }
975
976 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
977 {
978 __be32 *p;
979
980 p = reserve_space(xdr, 8);
981 *p++ = cpu_to_be32(OP_ACCESS);
982 *p = cpu_to_be32(access);
983 hdr->nops++;
984 hdr->replen += decode_access_maxsz;
985 }
986
987 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
988 {
989 __be32 *p;
990
991 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
992 *p++ = cpu_to_be32(OP_CLOSE);
993 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
994 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
995 hdr->nops++;
996 hdr->replen += decode_close_maxsz;
997 }
998
999 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1000 {
1001 __be32 *p;
1002
1003 p = reserve_space(xdr, 16);
1004 *p++ = cpu_to_be32(OP_COMMIT);
1005 p = xdr_encode_hyper(p, args->offset);
1006 *p = cpu_to_be32(args->count);
1007 hdr->nops++;
1008 hdr->replen += decode_commit_maxsz;
1009 }
1010
1011 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1012 {
1013 __be32 *p;
1014
1015 p = reserve_space(xdr, 8);
1016 *p++ = cpu_to_be32(OP_CREATE);
1017 *p = cpu_to_be32(create->ftype);
1018
1019 switch (create->ftype) {
1020 case NF4LNK:
1021 p = reserve_space(xdr, 4);
1022 *p = cpu_to_be32(create->u.symlink.len);
1023 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1024 break;
1025
1026 case NF4BLK: case NF4CHR:
1027 p = reserve_space(xdr, 8);
1028 *p++ = cpu_to_be32(create->u.device.specdata1);
1029 *p = cpu_to_be32(create->u.device.specdata2);
1030 break;
1031
1032 default:
1033 break;
1034 }
1035
1036 encode_string(xdr, create->name->len, create->name->name);
1037 hdr->nops++;
1038 hdr->replen += decode_create_maxsz;
1039
1040 encode_attrs(xdr, create->attrs, create->server);
1041 }
1042
1043 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1044 {
1045 __be32 *p;
1046
1047 p = reserve_space(xdr, 12);
1048 *p++ = cpu_to_be32(OP_GETATTR);
1049 *p++ = cpu_to_be32(1);
1050 *p = cpu_to_be32(bitmap);
1051 hdr->nops++;
1052 hdr->replen += decode_getattr_maxsz;
1053 }
1054
1055 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1056 {
1057 __be32 *p;
1058
1059 p = reserve_space(xdr, 16);
1060 *p++ = cpu_to_be32(OP_GETATTR);
1061 *p++ = cpu_to_be32(2);
1062 *p++ = cpu_to_be32(bm0);
1063 *p = cpu_to_be32(bm1);
1064 hdr->nops++;
1065 hdr->replen += decode_getattr_maxsz;
1066 }
1067
1068 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1069 {
1070 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1071 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1072 }
1073
1074 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1075 {
1076 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1077 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1078 }
1079
1080 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1081 {
1082 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1083 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1084 }
1085
1086 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1087 {
1088 __be32 *p;
1089
1090 p = reserve_space(xdr, 4);
1091 *p = cpu_to_be32(OP_GETFH);
1092 hdr->nops++;
1093 hdr->replen += decode_getfh_maxsz;
1094 }
1095
1096 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1097 {
1098 __be32 *p;
1099
1100 p = reserve_space(xdr, 8 + name->len);
1101 *p++ = cpu_to_be32(OP_LINK);
1102 xdr_encode_opaque(p, name->name, name->len);
1103 hdr->nops++;
1104 hdr->replen += decode_link_maxsz;
1105 }
1106
1107 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1108 {
1109 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1110 return block ? NFS4_READW_LT : NFS4_READ_LT;
1111 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1112 }
1113
1114 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1115 {
1116 if (fl->fl_end == OFFSET_MAX)
1117 return ~(uint64_t)0;
1118 return fl->fl_end - fl->fl_start + 1;
1119 }
1120
1121 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1122 {
1123 __be32 *p;
1124
1125 p = reserve_space(xdr, 32);
1126 p = xdr_encode_hyper(p, lowner->clientid);
1127 *p++ = cpu_to_be32(20);
1128 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1129 *p++ = cpu_to_be32(lowner->s_dev);
1130 xdr_encode_hyper(p, lowner->id);
1131 }
1132
1133 /*
1134 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1135 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1136 */
1137 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1138 {
1139 __be32 *p;
1140
1141 p = reserve_space(xdr, 32);
1142 *p++ = cpu_to_be32(OP_LOCK);
1143 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1144 *p++ = cpu_to_be32(args->reclaim);
1145 p = xdr_encode_hyper(p, args->fl->fl_start);
1146 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1147 *p = cpu_to_be32(args->new_lock_owner);
1148 if (args->new_lock_owner){
1149 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1150 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1151 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1152 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1153 encode_lockowner(xdr, &args->lock_owner);
1154 }
1155 else {
1156 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1157 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1158 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1159 }
1160 hdr->nops++;
1161 hdr->replen += decode_lock_maxsz;
1162 }
1163
1164 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1165 {
1166 __be32 *p;
1167
1168 p = reserve_space(xdr, 24);
1169 *p++ = cpu_to_be32(OP_LOCKT);
1170 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1171 p = xdr_encode_hyper(p, args->fl->fl_start);
1172 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1173 encode_lockowner(xdr, &args->lock_owner);
1174 hdr->nops++;
1175 hdr->replen += decode_lockt_maxsz;
1176 }
1177
1178 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1179 {
1180 __be32 *p;
1181
1182 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1183 *p++ = cpu_to_be32(OP_LOCKU);
1184 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1185 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1186 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1187 p = xdr_encode_hyper(p, args->fl->fl_start);
1188 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1189 hdr->nops++;
1190 hdr->replen += decode_locku_maxsz;
1191 }
1192
1193 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1194 {
1195 __be32 *p;
1196
1197 p = reserve_space(xdr, 4);
1198 *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1199 encode_lockowner(xdr, lowner);
1200 hdr->nops++;
1201 hdr->replen += decode_release_lockowner_maxsz;
1202 }
1203
1204 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1205 {
1206 int len = name->len;
1207 __be32 *p;
1208
1209 p = reserve_space(xdr, 8 + len);
1210 *p++ = cpu_to_be32(OP_LOOKUP);
1211 xdr_encode_opaque(p, name->name, len);
1212 hdr->nops++;
1213 hdr->replen += decode_lookup_maxsz;
1214 }
1215
1216 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1217 {
1218 __be32 *p;
1219
1220 p = reserve_space(xdr, 8);
1221 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1222 case FMODE_READ:
1223 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1224 break;
1225 case FMODE_WRITE:
1226 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1227 break;
1228 case FMODE_READ|FMODE_WRITE:
1229 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1230 break;
1231 default:
1232 *p++ = cpu_to_be32(0);
1233 }
1234 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1235 }
1236
1237 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1238 {
1239 __be32 *p;
1240 /*
1241 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1242 * owner 4 = 32
1243 */
1244 p = reserve_space(xdr, 8);
1245 *p++ = cpu_to_be32(OP_OPEN);
1246 *p = cpu_to_be32(arg->seqid->sequence->counter);
1247 encode_share_access(xdr, arg->fmode);
1248 p = reserve_space(xdr, 32);
1249 p = xdr_encode_hyper(p, arg->clientid);
1250 *p++ = cpu_to_be32(20);
1251 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1252 *p++ = cpu_to_be32(arg->server->s_dev);
1253 xdr_encode_hyper(p, arg->id);
1254 }
1255
1256 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1257 {
1258 __be32 *p;
1259 struct nfs_client *clp;
1260
1261 p = reserve_space(xdr, 4);
1262 switch(arg->open_flags & O_EXCL) {
1263 case 0:
1264 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1265 encode_attrs(xdr, arg->u.attrs, arg->server);
1266 break;
1267 default:
1268 clp = arg->server->nfs_client;
1269 if (clp->cl_mvops->minor_version > 0) {
1270 if (nfs4_has_persistent_session(clp)) {
1271 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1272 encode_attrs(xdr, arg->u.attrs, arg->server);
1273 } else {
1274 struct iattr dummy;
1275
1276 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1277 encode_nfs4_verifier(xdr, &arg->u.verifier);
1278 dummy.ia_valid = 0;
1279 encode_attrs(xdr, &dummy, arg->server);
1280 }
1281 } else {
1282 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1283 encode_nfs4_verifier(xdr, &arg->u.verifier);
1284 }
1285 }
1286 }
1287
1288 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1289 {
1290 __be32 *p;
1291
1292 p = reserve_space(xdr, 4);
1293 switch (arg->open_flags & O_CREAT) {
1294 case 0:
1295 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1296 break;
1297 default:
1298 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1299 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1300 encode_createmode(xdr, arg);
1301 }
1302 }
1303
1304 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1305 {
1306 __be32 *p;
1307
1308 p = reserve_space(xdr, 4);
1309 switch (delegation_type) {
1310 case 0:
1311 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1312 break;
1313 case FMODE_READ:
1314 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1315 break;
1316 case FMODE_WRITE|FMODE_READ:
1317 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1318 break;
1319 default:
1320 BUG();
1321 }
1322 }
1323
1324 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1325 {
1326 __be32 *p;
1327
1328 p = reserve_space(xdr, 4);
1329 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1330 encode_string(xdr, name->len, name->name);
1331 }
1332
1333 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1334 {
1335 __be32 *p;
1336
1337 p = reserve_space(xdr, 4);
1338 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1339 encode_delegation_type(xdr, type);
1340 }
1341
1342 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1343 {
1344 __be32 *p;
1345
1346 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1347 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1348 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1349 encode_string(xdr, name->len, name->name);
1350 }
1351
1352 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1353 {
1354 encode_openhdr(xdr, arg);
1355 encode_opentype(xdr, arg);
1356 switch (arg->claim) {
1357 case NFS4_OPEN_CLAIM_NULL:
1358 encode_claim_null(xdr, arg->name);
1359 break;
1360 case NFS4_OPEN_CLAIM_PREVIOUS:
1361 encode_claim_previous(xdr, arg->u.delegation_type);
1362 break;
1363 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1364 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1365 break;
1366 default:
1367 BUG();
1368 }
1369 hdr->nops++;
1370 hdr->replen += decode_open_maxsz;
1371 }
1372
1373 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1374 {
1375 __be32 *p;
1376
1377 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1378 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1379 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1380 *p = cpu_to_be32(arg->seqid->sequence->counter);
1381 hdr->nops++;
1382 hdr->replen += decode_open_confirm_maxsz;
1383 }
1384
1385 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1386 {
1387 __be32 *p;
1388
1389 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1390 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1391 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1392 *p = cpu_to_be32(arg->seqid->sequence->counter);
1393 encode_share_access(xdr, arg->fmode);
1394 hdr->nops++;
1395 hdr->replen += decode_open_downgrade_maxsz;
1396 }
1397
1398 static void
1399 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1400 {
1401 int len = fh->size;
1402 __be32 *p;
1403
1404 p = reserve_space(xdr, 8 + len);
1405 *p++ = cpu_to_be32(OP_PUTFH);
1406 xdr_encode_opaque(p, fh->data, len);
1407 hdr->nops++;
1408 hdr->replen += decode_putfh_maxsz;
1409 }
1410
1411 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1412 {
1413 __be32 *p;
1414
1415 p = reserve_space(xdr, 4);
1416 *p = cpu_to_be32(OP_PUTROOTFH);
1417 hdr->nops++;
1418 hdr->replen += decode_putrootfh_maxsz;
1419 }
1420
1421 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1422 {
1423 nfs4_stateid stateid;
1424 __be32 *p;
1425
1426 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1427 if (ctx->state != NULL) {
1428 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1429 if (zero_seqid)
1430 stateid.stateid.seqid = 0;
1431 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1432 } else
1433 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1434 }
1435
1436 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1437 {
1438 __be32 *p;
1439
1440 p = reserve_space(xdr, 4);
1441 *p = cpu_to_be32(OP_READ);
1442
1443 encode_stateid(xdr, args->context, args->lock_context,
1444 hdr->minorversion);
1445
1446 p = reserve_space(xdr, 12);
1447 p = xdr_encode_hyper(p, args->offset);
1448 *p = cpu_to_be32(args->count);
1449 hdr->nops++;
1450 hdr->replen += decode_read_maxsz;
1451 }
1452
1453 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1454 {
1455 uint32_t attrs[2] = {
1456 FATTR4_WORD0_RDATTR_ERROR,
1457 FATTR4_WORD1_MOUNTED_ON_FILEID,
1458 };
1459 uint32_t dircount = readdir->count >> 1;
1460 __be32 *p;
1461
1462 if (readdir->plus) {
1463 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1464 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1465 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1466 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1467 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1468 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1469 dircount >>= 1;
1470 }
1471 /* Use mounted_on_fileid only if the server supports it */
1472 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1473 attrs[0] |= FATTR4_WORD0_FILEID;
1474
1475 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1476 *p++ = cpu_to_be32(OP_READDIR);
1477 p = xdr_encode_hyper(p, readdir->cookie);
1478 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1479 *p++ = cpu_to_be32(dircount);
1480 *p++ = cpu_to_be32(readdir->count);
1481 *p++ = cpu_to_be32(2);
1482
1483 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1484 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1485 hdr->nops++;
1486 hdr->replen += decode_readdir_maxsz;
1487 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1488 __func__,
1489 (unsigned long long)readdir->cookie,
1490 ((u32 *)readdir->verifier.data)[0],
1491 ((u32 *)readdir->verifier.data)[1],
1492 attrs[0] & readdir->bitmask[0],
1493 attrs[1] & readdir->bitmask[1]);
1494 }
1495
1496 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1497 {
1498 __be32 *p;
1499
1500 p = reserve_space(xdr, 4);
1501 *p = cpu_to_be32(OP_READLINK);
1502 hdr->nops++;
1503 hdr->replen += decode_readlink_maxsz;
1504 }
1505
1506 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1507 {
1508 __be32 *p;
1509
1510 p = reserve_space(xdr, 8 + name->len);
1511 *p++ = cpu_to_be32(OP_REMOVE);
1512 xdr_encode_opaque(p, name->name, name->len);
1513 hdr->nops++;
1514 hdr->replen += decode_remove_maxsz;
1515 }
1516
1517 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1518 {
1519 __be32 *p;
1520
1521 p = reserve_space(xdr, 4);
1522 *p = cpu_to_be32(OP_RENAME);
1523 encode_string(xdr, oldname->len, oldname->name);
1524 encode_string(xdr, newname->len, newname->name);
1525 hdr->nops++;
1526 hdr->replen += decode_rename_maxsz;
1527 }
1528
1529 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1530 {
1531 __be32 *p;
1532
1533 p = reserve_space(xdr, 12);
1534 *p++ = cpu_to_be32(OP_RENEW);
1535 xdr_encode_hyper(p, client_stateid->cl_clientid);
1536 hdr->nops++;
1537 hdr->replen += decode_renew_maxsz;
1538 }
1539
1540 static void
1541 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1542 {
1543 __be32 *p;
1544
1545 p = reserve_space(xdr, 4);
1546 *p = cpu_to_be32(OP_RESTOREFH);
1547 hdr->nops++;
1548 hdr->replen += decode_restorefh_maxsz;
1549 }
1550
1551 static void
1552 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1553 {
1554 __be32 *p;
1555
1556 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1557 *p++ = cpu_to_be32(OP_SETATTR);
1558 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1559 p = reserve_space(xdr, 2*4);
1560 *p++ = cpu_to_be32(1);
1561 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1562 BUG_ON(arg->acl_len % 4);
1563 p = reserve_space(xdr, 4);
1564 *p = cpu_to_be32(arg->acl_len);
1565 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1566 hdr->nops++;
1567 hdr->replen += decode_setacl_maxsz;
1568 }
1569
1570 static void
1571 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1572 {
1573 __be32 *p;
1574
1575 p = reserve_space(xdr, 4);
1576 *p = cpu_to_be32(OP_SAVEFH);
1577 hdr->nops++;
1578 hdr->replen += decode_savefh_maxsz;
1579 }
1580
1581 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1582 {
1583 __be32 *p;
1584
1585 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1586 *p++ = cpu_to_be32(OP_SETATTR);
1587 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1588 hdr->nops++;
1589 hdr->replen += decode_setattr_maxsz;
1590 encode_attrs(xdr, arg->iap, server);
1591 }
1592
1593 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1594 {
1595 __be32 *p;
1596
1597 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1598 *p++ = cpu_to_be32(OP_SETCLIENTID);
1599 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1600
1601 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1602 p = reserve_space(xdr, 4);
1603 *p = cpu_to_be32(setclientid->sc_prog);
1604 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1605 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1606 p = reserve_space(xdr, 4);
1607 *p = cpu_to_be32(setclientid->sc_cb_ident);
1608 hdr->nops++;
1609 hdr->replen += decode_setclientid_maxsz;
1610 }
1611
1612 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1613 {
1614 __be32 *p;
1615
1616 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1617 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1618 p = xdr_encode_hyper(p, arg->clientid);
1619 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1620 hdr->nops++;
1621 hdr->replen += decode_setclientid_confirm_maxsz;
1622 }
1623
1624 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1625 {
1626 __be32 *p;
1627
1628 p = reserve_space(xdr, 4);
1629 *p = cpu_to_be32(OP_WRITE);
1630
1631 encode_stateid(xdr, args->context, args->lock_context,
1632 hdr->minorversion);
1633
1634 p = reserve_space(xdr, 16);
1635 p = xdr_encode_hyper(p, args->offset);
1636 *p++ = cpu_to_be32(args->stable);
1637 *p = cpu_to_be32(args->count);
1638
1639 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1640 hdr->nops++;
1641 hdr->replen += decode_write_maxsz;
1642 }
1643
1644 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1645 {
1646 __be32 *p;
1647
1648 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1649
1650 *p++ = cpu_to_be32(OP_DELEGRETURN);
1651 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1652 hdr->nops++;
1653 hdr->replen += decode_delegreturn_maxsz;
1654 }
1655
1656 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1657 {
1658 int len = name->len;
1659 __be32 *p;
1660
1661 p = reserve_space(xdr, 8 + len);
1662 *p++ = cpu_to_be32(OP_SECINFO);
1663 xdr_encode_opaque(p, name->name, len);
1664 hdr->nops++;
1665 hdr->replen += decode_secinfo_maxsz;
1666 }
1667
1668 #if defined(CONFIG_NFS_V4_1)
1669 /* NFSv4.1 operations */
1670 static void encode_exchange_id(struct xdr_stream *xdr,
1671 struct nfs41_exchange_id_args *args,
1672 struct compound_hdr *hdr)
1673 {
1674 __be32 *p;
1675
1676 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1677 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1678 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1679
1680 encode_string(xdr, args->id_len, args->id);
1681
1682 p = reserve_space(xdr, 12);
1683 *p++ = cpu_to_be32(args->flags);
1684 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1685 *p = cpu_to_be32(0); /* zero length implementation id array */
1686 hdr->nops++;
1687 hdr->replen += decode_exchange_id_maxsz;
1688 }
1689
1690 static void encode_create_session(struct xdr_stream *xdr,
1691 struct nfs41_create_session_args *args,
1692 struct compound_hdr *hdr)
1693 {
1694 __be32 *p;
1695 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1696 uint32_t len;
1697 struct nfs_client *clp = args->client;
1698 u32 max_resp_sz_cached;
1699
1700 /*
1701 * Assumes OPEN is the biggest non-idempotent compound.
1702 * 2 is the verifier.
1703 */
1704 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1705 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1706
1707 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1708 clp->cl_ipaddr);
1709
1710 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1711 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1712 p = xdr_encode_hyper(p, clp->cl_clientid);
1713 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1714 *p++ = cpu_to_be32(args->flags); /*flags */
1715
1716 /* Fore Channel */
1717 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1718 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1719 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1720 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1721 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1722 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1723 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1724
1725 /* Back Channel */
1726 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1727 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1728 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1729 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1730 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1731 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1732 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1733
1734 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1735 *p++ = cpu_to_be32(1);
1736 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1737
1738 /* authsys_parms rfc1831 */
1739 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1740 p = xdr_encode_opaque(p, machine_name, len);
1741 *p++ = cpu_to_be32(0); /* UID */
1742 *p++ = cpu_to_be32(0); /* GID */
1743 *p = cpu_to_be32(0); /* No more gids */
1744 hdr->nops++;
1745 hdr->replen += decode_create_session_maxsz;
1746 }
1747
1748 static void encode_destroy_session(struct xdr_stream *xdr,
1749 struct nfs4_session *session,
1750 struct compound_hdr *hdr)
1751 {
1752 __be32 *p;
1753 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1754 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1755 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1756 hdr->nops++;
1757 hdr->replen += decode_destroy_session_maxsz;
1758 }
1759
1760 static void encode_reclaim_complete(struct xdr_stream *xdr,
1761 struct nfs41_reclaim_complete_args *args,
1762 struct compound_hdr *hdr)
1763 {
1764 __be32 *p;
1765
1766 p = reserve_space(xdr, 8);
1767 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1768 *p++ = cpu_to_be32(args->one_fs);
1769 hdr->nops++;
1770 hdr->replen += decode_reclaim_complete_maxsz;
1771 }
1772 #endif /* CONFIG_NFS_V4_1 */
1773
1774 static void encode_sequence(struct xdr_stream *xdr,
1775 const struct nfs4_sequence_args *args,
1776 struct compound_hdr *hdr)
1777 {
1778 #if defined(CONFIG_NFS_V4_1)
1779 struct nfs4_session *session = args->sa_session;
1780 struct nfs4_slot_table *tp;
1781 struct nfs4_slot *slot;
1782 __be32 *p;
1783
1784 if (!session)
1785 return;
1786
1787 tp = &session->fc_slot_table;
1788
1789 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1790 slot = tp->slots + args->sa_slotid;
1791
1792 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1793 *p++ = cpu_to_be32(OP_SEQUENCE);
1794
1795 /*
1796 * Sessionid + seqid + slotid + max slotid + cache_this
1797 */
1798 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1799 "max_slotid=%d cache_this=%d\n",
1800 __func__,
1801 ((u32 *)session->sess_id.data)[0],
1802 ((u32 *)session->sess_id.data)[1],
1803 ((u32 *)session->sess_id.data)[2],
1804 ((u32 *)session->sess_id.data)[3],
1805 slot->seq_nr, args->sa_slotid,
1806 tp->highest_used_slotid, args->sa_cache_this);
1807 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1808 *p++ = cpu_to_be32(slot->seq_nr);
1809 *p++ = cpu_to_be32(args->sa_slotid);
1810 *p++ = cpu_to_be32(tp->highest_used_slotid);
1811 *p = cpu_to_be32(args->sa_cache_this);
1812 hdr->nops++;
1813 hdr->replen += decode_sequence_maxsz;
1814 #endif /* CONFIG_NFS_V4_1 */
1815 }
1816
1817 #ifdef CONFIG_NFS_V4_1
1818 static void
1819 encode_getdeviceinfo(struct xdr_stream *xdr,
1820 const struct nfs4_getdeviceinfo_args *args,
1821 struct compound_hdr *hdr)
1822 {
1823 __be32 *p;
1824
1825 p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1826 *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1827 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1828 NFS4_DEVICEID4_SIZE);
1829 *p++ = cpu_to_be32(args->pdev->layout_type);
1830 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1831 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1832 hdr->nops++;
1833 hdr->replen += decode_getdeviceinfo_maxsz;
1834 }
1835
1836 static void
1837 encode_layoutget(struct xdr_stream *xdr,
1838 const struct nfs4_layoutget_args *args,
1839 struct compound_hdr *hdr)
1840 {
1841 __be32 *p;
1842
1843 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1844 *p++ = cpu_to_be32(OP_LAYOUTGET);
1845 *p++ = cpu_to_be32(0); /* Signal layout available */
1846 *p++ = cpu_to_be32(args->type);
1847 *p++ = cpu_to_be32(args->range.iomode);
1848 p = xdr_encode_hyper(p, args->range.offset);
1849 p = xdr_encode_hyper(p, args->range.length);
1850 p = xdr_encode_hyper(p, args->minlength);
1851 p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1852 *p = cpu_to_be32(args->maxcount);
1853
1854 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1855 __func__,
1856 args->type,
1857 args->range.iomode,
1858 (unsigned long)args->range.offset,
1859 (unsigned long)args->range.length,
1860 args->maxcount);
1861 hdr->nops++;
1862 hdr->replen += decode_layoutget_maxsz;
1863 }
1864
1865 static int
1866 encode_layoutcommit(struct xdr_stream *xdr,
1867 const struct nfs4_layoutcommit_args *args,
1868 struct compound_hdr *hdr)
1869 {
1870 __be32 *p;
1871
1872 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1873 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1874
1875 p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
1876 *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1877 /* Only whole file layouts */
1878 p = xdr_encode_hyper(p, 0); /* offset */
1879 p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
1880 *p++ = cpu_to_be32(0); /* reclaim */
1881 p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1882 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1883 p = xdr_encode_hyper(p, args->lastbytewritten);
1884 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1885 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1886 *p++ = cpu_to_be32(0); /* no file layout payload */
1887
1888 hdr->nops++;
1889 hdr->replen += decode_layoutcommit_maxsz;
1890 return 0;
1891 }
1892 #endif /* CONFIG_NFS_V4_1 */
1893
1894 /*
1895 * END OF "GENERIC" ENCODE ROUTINES.
1896 */
1897
1898 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1899 {
1900 #if defined(CONFIG_NFS_V4_1)
1901 if (args->sa_session)
1902 return args->sa_session->clp->cl_mvops->minor_version;
1903 #endif /* CONFIG_NFS_V4_1 */
1904 return 0;
1905 }
1906
1907 /*
1908 * Encode an ACCESS request
1909 */
1910 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1911 const struct nfs4_accessargs *args)
1912 {
1913 struct compound_hdr hdr = {
1914 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1915 };
1916
1917 encode_compound_hdr(xdr, req, &hdr);
1918 encode_sequence(xdr, &args->seq_args, &hdr);
1919 encode_putfh(xdr, args->fh, &hdr);
1920 encode_access(xdr, args->access, &hdr);
1921 encode_getfattr(xdr, args->bitmask, &hdr);
1922 encode_nops(&hdr);
1923 }
1924
1925 /*
1926 * Encode LOOKUP request
1927 */
1928 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1929 const struct nfs4_lookup_arg *args)
1930 {
1931 struct compound_hdr hdr = {
1932 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1933 };
1934
1935 encode_compound_hdr(xdr, req, &hdr);
1936 encode_sequence(xdr, &args->seq_args, &hdr);
1937 encode_putfh(xdr, args->dir_fh, &hdr);
1938 encode_lookup(xdr, args->name, &hdr);
1939 encode_getfh(xdr, &hdr);
1940 encode_getfattr(xdr, args->bitmask, &hdr);
1941 encode_nops(&hdr);
1942 }
1943
1944 /*
1945 * Encode LOOKUP_ROOT request
1946 */
1947 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1948 struct xdr_stream *xdr,
1949 const struct nfs4_lookup_root_arg *args)
1950 {
1951 struct compound_hdr hdr = {
1952 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1953 };
1954
1955 encode_compound_hdr(xdr, req, &hdr);
1956 encode_sequence(xdr, &args->seq_args, &hdr);
1957 encode_putrootfh(xdr, &hdr);
1958 encode_getfh(xdr, &hdr);
1959 encode_getfattr(xdr, args->bitmask, &hdr);
1960 encode_nops(&hdr);
1961 }
1962
1963 /*
1964 * Encode REMOVE request
1965 */
1966 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1967 const struct nfs_removeargs *args)
1968 {
1969 struct compound_hdr hdr = {
1970 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1971 };
1972
1973 encode_compound_hdr(xdr, req, &hdr);
1974 encode_sequence(xdr, &args->seq_args, &hdr);
1975 encode_putfh(xdr, args->fh, &hdr);
1976 encode_remove(xdr, &args->name, &hdr);
1977 encode_getfattr(xdr, args->bitmask, &hdr);
1978 encode_nops(&hdr);
1979 }
1980
1981 /*
1982 * Encode RENAME request
1983 */
1984 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1985 const struct nfs_renameargs *args)
1986 {
1987 struct compound_hdr hdr = {
1988 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1989 };
1990
1991 encode_compound_hdr(xdr, req, &hdr);
1992 encode_sequence(xdr, &args->seq_args, &hdr);
1993 encode_putfh(xdr, args->old_dir, &hdr);
1994 encode_savefh(xdr, &hdr);
1995 encode_putfh(xdr, args->new_dir, &hdr);
1996 encode_rename(xdr, args->old_name, args->new_name, &hdr);
1997 encode_getfattr(xdr, args->bitmask, &hdr);
1998 encode_restorefh(xdr, &hdr);
1999 encode_getfattr(xdr, args->bitmask, &hdr);
2000 encode_nops(&hdr);
2001 }
2002
2003 /*
2004 * Encode LINK request
2005 */
2006 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2007 const struct nfs4_link_arg *args)
2008 {
2009 struct compound_hdr hdr = {
2010 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2011 };
2012
2013 encode_compound_hdr(xdr, req, &hdr);
2014 encode_sequence(xdr, &args->seq_args, &hdr);
2015 encode_putfh(xdr, args->fh, &hdr);
2016 encode_savefh(xdr, &hdr);
2017 encode_putfh(xdr, args->dir_fh, &hdr);
2018 encode_link(xdr, args->name, &hdr);
2019 encode_getfattr(xdr, args->bitmask, &hdr);
2020 encode_restorefh(xdr, &hdr);
2021 encode_getfattr(xdr, args->bitmask, &hdr);
2022 encode_nops(&hdr);
2023 }
2024
2025 /*
2026 * Encode CREATE request
2027 */
2028 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2029 const struct nfs4_create_arg *args)
2030 {
2031 struct compound_hdr hdr = {
2032 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2033 };
2034
2035 encode_compound_hdr(xdr, req, &hdr);
2036 encode_sequence(xdr, &args->seq_args, &hdr);
2037 encode_putfh(xdr, args->dir_fh, &hdr);
2038 encode_savefh(xdr, &hdr);
2039 encode_create(xdr, args, &hdr);
2040 encode_getfh(xdr, &hdr);
2041 encode_getfattr(xdr, args->bitmask, &hdr);
2042 encode_restorefh(xdr, &hdr);
2043 encode_getfattr(xdr, args->bitmask, &hdr);
2044 encode_nops(&hdr);
2045 }
2046
2047 /*
2048 * Encode SYMLINK request
2049 */
2050 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2051 const struct nfs4_create_arg *args)
2052 {
2053 nfs4_xdr_enc_create(req, xdr, args);
2054 }
2055
2056 /*
2057 * Encode GETATTR request
2058 */
2059 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2060 const struct nfs4_getattr_arg *args)
2061 {
2062 struct compound_hdr hdr = {
2063 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2064 };
2065
2066 encode_compound_hdr(xdr, req, &hdr);
2067 encode_sequence(xdr, &args->seq_args, &hdr);
2068 encode_putfh(xdr, args->fh, &hdr);
2069 encode_getfattr(xdr, args->bitmask, &hdr);
2070 encode_nops(&hdr);
2071 }
2072
2073 /*
2074 * Encode a CLOSE request
2075 */
2076 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2077 struct nfs_closeargs *args)
2078 {
2079 struct compound_hdr hdr = {
2080 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081 };
2082
2083 encode_compound_hdr(xdr, req, &hdr);
2084 encode_sequence(xdr, &args->seq_args, &hdr);
2085 encode_putfh(xdr, args->fh, &hdr);
2086 encode_close(xdr, args, &hdr);
2087 encode_getfattr(xdr, args->bitmask, &hdr);
2088 encode_nops(&hdr);
2089 }
2090
2091 /*
2092 * Encode an OPEN request
2093 */
2094 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2095 struct nfs_openargs *args)
2096 {
2097 struct compound_hdr hdr = {
2098 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099 };
2100
2101 encode_compound_hdr(xdr, req, &hdr);
2102 encode_sequence(xdr, &args->seq_args, &hdr);
2103 encode_putfh(xdr, args->fh, &hdr);
2104 encode_savefh(xdr, &hdr);
2105 encode_open(xdr, args, &hdr);
2106 encode_getfh(xdr, &hdr);
2107 encode_getfattr(xdr, args->bitmask, &hdr);
2108 encode_restorefh(xdr, &hdr);
2109 encode_getfattr(xdr, args->bitmask, &hdr);
2110 encode_nops(&hdr);
2111 }
2112
2113 /*
2114 * Encode an OPEN_CONFIRM request
2115 */
2116 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2117 struct xdr_stream *xdr,
2118 struct nfs_open_confirmargs *args)
2119 {
2120 struct compound_hdr hdr = {
2121 .nops = 0,
2122 };
2123
2124 encode_compound_hdr(xdr, req, &hdr);
2125 encode_putfh(xdr, args->fh, &hdr);
2126 encode_open_confirm(xdr, args, &hdr);
2127 encode_nops(&hdr);
2128 }
2129
2130 /*
2131 * Encode an OPEN request with no attributes.
2132 */
2133 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2134 struct xdr_stream *xdr,
2135 struct nfs_openargs *args)
2136 {
2137 struct compound_hdr hdr = {
2138 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139 };
2140
2141 encode_compound_hdr(xdr, req, &hdr);
2142 encode_sequence(xdr, &args->seq_args, &hdr);
2143 encode_putfh(xdr, args->fh, &hdr);
2144 encode_open(xdr, args, &hdr);
2145 encode_getfattr(xdr, args->bitmask, &hdr);
2146 encode_nops(&hdr);
2147 }
2148
2149 /*
2150 * Encode an OPEN_DOWNGRADE request
2151 */
2152 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2153 struct xdr_stream *xdr,
2154 struct nfs_closeargs *args)
2155 {
2156 struct compound_hdr hdr = {
2157 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2158 };
2159
2160 encode_compound_hdr(xdr, req, &hdr);
2161 encode_sequence(xdr, &args->seq_args, &hdr);
2162 encode_putfh(xdr, args->fh, &hdr);
2163 encode_open_downgrade(xdr, args, &hdr);
2164 encode_getfattr(xdr, args->bitmask, &hdr);
2165 encode_nops(&hdr);
2166 }
2167
2168 /*
2169 * Encode a LOCK request
2170 */
2171 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2172 struct nfs_lock_args *args)
2173 {
2174 struct compound_hdr hdr = {
2175 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176 };
2177
2178 encode_compound_hdr(xdr, req, &hdr);
2179 encode_sequence(xdr, &args->seq_args, &hdr);
2180 encode_putfh(xdr, args->fh, &hdr);
2181 encode_lock(xdr, args, &hdr);
2182 encode_nops(&hdr);
2183 }
2184
2185 /*
2186 * Encode a LOCKT request
2187 */
2188 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2189 struct nfs_lockt_args *args)
2190 {
2191 struct compound_hdr hdr = {
2192 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193 };
2194
2195 encode_compound_hdr(xdr, req, &hdr);
2196 encode_sequence(xdr, &args->seq_args, &hdr);
2197 encode_putfh(xdr, args->fh, &hdr);
2198 encode_lockt(xdr, args, &hdr);
2199 encode_nops(&hdr);
2200 }
2201
2202 /*
2203 * Encode a LOCKU request
2204 */
2205 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2206 struct nfs_locku_args *args)
2207 {
2208 struct compound_hdr hdr = {
2209 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2210 };
2211
2212 encode_compound_hdr(xdr, req, &hdr);
2213 encode_sequence(xdr, &args->seq_args, &hdr);
2214 encode_putfh(xdr, args->fh, &hdr);
2215 encode_locku(xdr, args, &hdr);
2216 encode_nops(&hdr);
2217 }
2218
2219 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2220 struct xdr_stream *xdr,
2221 struct nfs_release_lockowner_args *args)
2222 {
2223 struct compound_hdr hdr = {
2224 .minorversion = 0,
2225 };
2226
2227 encode_compound_hdr(xdr, req, &hdr);
2228 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2229 encode_nops(&hdr);
2230 }
2231
2232 /*
2233 * Encode a READLINK request
2234 */
2235 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2236 const struct nfs4_readlink *args)
2237 {
2238 struct compound_hdr hdr = {
2239 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240 };
2241
2242 encode_compound_hdr(xdr, req, &hdr);
2243 encode_sequence(xdr, &args->seq_args, &hdr);
2244 encode_putfh(xdr, args->fh, &hdr);
2245 encode_readlink(xdr, args, req, &hdr);
2246
2247 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2248 args->pgbase, args->pglen);
2249 encode_nops(&hdr);
2250 }
2251
2252 /*
2253 * Encode a READDIR request
2254 */
2255 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2256 const struct nfs4_readdir_arg *args)
2257 {
2258 struct compound_hdr hdr = {
2259 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260 };
2261
2262 encode_compound_hdr(xdr, req, &hdr);
2263 encode_sequence(xdr, &args->seq_args, &hdr);
2264 encode_putfh(xdr, args->fh, &hdr);
2265 encode_readdir(xdr, args, req, &hdr);
2266
2267 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2268 args->pgbase, args->count);
2269 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2270 __func__, hdr.replen << 2, args->pages,
2271 args->pgbase, args->count);
2272 encode_nops(&hdr);
2273 }
2274
2275 /*
2276 * Encode a READ request
2277 */
2278 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2279 struct nfs_readargs *args)
2280 {
2281 struct compound_hdr hdr = {
2282 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2283 };
2284
2285 encode_compound_hdr(xdr, req, &hdr);
2286 encode_sequence(xdr, &args->seq_args, &hdr);
2287 encode_putfh(xdr, args->fh, &hdr);
2288 encode_read(xdr, args, &hdr);
2289
2290 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2291 args->pages, args->pgbase, args->count);
2292 req->rq_rcv_buf.flags |= XDRBUF_READ;
2293 encode_nops(&hdr);
2294 }
2295
2296 /*
2297 * Encode an SETATTR request
2298 */
2299 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2300 struct nfs_setattrargs *args)
2301 {
2302 struct compound_hdr hdr = {
2303 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2304 };
2305
2306 encode_compound_hdr(xdr, req, &hdr);
2307 encode_sequence(xdr, &args->seq_args, &hdr);
2308 encode_putfh(xdr, args->fh, &hdr);
2309 encode_setattr(xdr, args, args->server, &hdr);
2310 encode_getfattr(xdr, args->bitmask, &hdr);
2311 encode_nops(&hdr);
2312 }
2313
2314 /*
2315 * Encode a GETACL request
2316 */
2317 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2318 struct nfs_getaclargs *args)
2319 {
2320 struct compound_hdr hdr = {
2321 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2322 };
2323 uint32_t replen;
2324
2325 encode_compound_hdr(xdr, req, &hdr);
2326 encode_sequence(xdr, &args->seq_args, &hdr);
2327 encode_putfh(xdr, args->fh, &hdr);
2328 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2329 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2330
2331 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2332 args->acl_pages, args->acl_pgbase, args->acl_len);
2333 encode_nops(&hdr);
2334 }
2335
2336 /*
2337 * Encode a WRITE request
2338 */
2339 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2340 struct nfs_writeargs *args)
2341 {
2342 struct compound_hdr hdr = {
2343 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2344 };
2345
2346 encode_compound_hdr(xdr, req, &hdr);
2347 encode_sequence(xdr, &args->seq_args, &hdr);
2348 encode_putfh(xdr, args->fh, &hdr);
2349 encode_write(xdr, args, &hdr);
2350 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2351 if (args->bitmask)
2352 encode_getfattr(xdr, args->bitmask, &hdr);
2353 encode_nops(&hdr);
2354 }
2355
2356 /*
2357 * a COMMIT request
2358 */
2359 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2360 struct nfs_writeargs *args)
2361 {
2362 struct compound_hdr hdr = {
2363 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2364 };
2365
2366 encode_compound_hdr(xdr, req, &hdr);
2367 encode_sequence(xdr, &args->seq_args, &hdr);
2368 encode_putfh(xdr, args->fh, &hdr);
2369 encode_commit(xdr, args, &hdr);
2370 if (args->bitmask)
2371 encode_getfattr(xdr, args->bitmask, &hdr);
2372 encode_nops(&hdr);
2373 }
2374
2375 /*
2376 * FSINFO request
2377 */
2378 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2379 struct nfs4_fsinfo_arg *args)
2380 {
2381 struct compound_hdr hdr = {
2382 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2383 };
2384
2385 encode_compound_hdr(xdr, req, &hdr);
2386 encode_sequence(xdr, &args->seq_args, &hdr);
2387 encode_putfh(xdr, args->fh, &hdr);
2388 encode_fsinfo(xdr, args->bitmask, &hdr);
2389 encode_nops(&hdr);
2390 }
2391
2392 /*
2393 * a PATHCONF request
2394 */
2395 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2396 const struct nfs4_pathconf_arg *args)
2397 {
2398 struct compound_hdr hdr = {
2399 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2400 };
2401
2402 encode_compound_hdr(xdr, req, &hdr);
2403 encode_sequence(xdr, &args->seq_args, &hdr);
2404 encode_putfh(xdr, args->fh, &hdr);
2405 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2406 &hdr);
2407 encode_nops(&hdr);
2408 }
2409
2410 /*
2411 * a STATFS request
2412 */
2413 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2414 const struct nfs4_statfs_arg *args)
2415 {
2416 struct compound_hdr hdr = {
2417 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418 };
2419
2420 encode_compound_hdr(xdr, req, &hdr);
2421 encode_sequence(xdr, &args->seq_args, &hdr);
2422 encode_putfh(xdr, args->fh, &hdr);
2423 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2424 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2425 encode_nops(&hdr);
2426 }
2427
2428 /*
2429 * GETATTR_BITMAP request
2430 */
2431 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2432 struct xdr_stream *xdr,
2433 struct nfs4_server_caps_arg *args)
2434 {
2435 struct compound_hdr hdr = {
2436 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2437 };
2438
2439 encode_compound_hdr(xdr, req, &hdr);
2440 encode_sequence(xdr, &args->seq_args, &hdr);
2441 encode_putfh(xdr, args->fhandle, &hdr);
2442 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2443 FATTR4_WORD0_LINK_SUPPORT|
2444 FATTR4_WORD0_SYMLINK_SUPPORT|
2445 FATTR4_WORD0_ACLSUPPORT, &hdr);
2446 encode_nops(&hdr);
2447 }
2448
2449 /*
2450 * a RENEW request
2451 */
2452 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2453 struct nfs_client *clp)
2454 {
2455 struct compound_hdr hdr = {
2456 .nops = 0,
2457 };
2458
2459 encode_compound_hdr(xdr, req, &hdr);
2460 encode_renew(xdr, clp, &hdr);
2461 encode_nops(&hdr);
2462 }
2463
2464 /*
2465 * a SETCLIENTID request
2466 */
2467 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2468 struct xdr_stream *xdr,
2469 struct nfs4_setclientid *sc)
2470 {
2471 struct compound_hdr hdr = {
2472 .nops = 0,
2473 };
2474
2475 encode_compound_hdr(xdr, req, &hdr);
2476 encode_setclientid(xdr, sc, &hdr);
2477 encode_nops(&hdr);
2478 }
2479
2480 /*
2481 * a SETCLIENTID_CONFIRM request
2482 */
2483 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2484 struct xdr_stream *xdr,
2485 struct nfs4_setclientid_res *arg)
2486 {
2487 struct compound_hdr hdr = {
2488 .nops = 0,
2489 };
2490 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2491
2492 encode_compound_hdr(xdr, req, &hdr);
2493 encode_setclientid_confirm(xdr, arg, &hdr);
2494 encode_putrootfh(xdr, &hdr);
2495 encode_fsinfo(xdr, lease_bitmap, &hdr);
2496 encode_nops(&hdr);
2497 }
2498
2499 /*
2500 * DELEGRETURN request
2501 */
2502 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2503 struct xdr_stream *xdr,
2504 const struct nfs4_delegreturnargs *args)
2505 {
2506 struct compound_hdr hdr = {
2507 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2508 };
2509
2510 encode_compound_hdr(xdr, req, &hdr);
2511 encode_sequence(xdr, &args->seq_args, &hdr);
2512 encode_putfh(xdr, args->fhandle, &hdr);
2513 encode_delegreturn(xdr, args->stateid, &hdr);
2514 encode_getfattr(xdr, args->bitmask, &hdr);
2515 encode_nops(&hdr);
2516 }
2517
2518 /*
2519 * Encode FS_LOCATIONS request
2520 */
2521 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2522 struct xdr_stream *xdr,
2523 struct nfs4_fs_locations_arg *args)
2524 {
2525 struct compound_hdr hdr = {
2526 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527 };
2528 uint32_t replen;
2529
2530 encode_compound_hdr(xdr, req, &hdr);
2531 encode_sequence(xdr, &args->seq_args, &hdr);
2532 encode_putfh(xdr, args->dir_fh, &hdr);
2533 encode_lookup(xdr, args->name, &hdr);
2534 replen = hdr.replen; /* get the attribute into args->page */
2535 encode_fs_locations(xdr, args->bitmask, &hdr);
2536
2537 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2538 0, PAGE_SIZE);
2539 encode_nops(&hdr);
2540 }
2541
2542 /*
2543 * Encode SECINFO request
2544 */
2545 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2546 struct xdr_stream *xdr,
2547 struct nfs4_secinfo_arg *args)
2548 {
2549 struct compound_hdr hdr = {
2550 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2551 };
2552
2553 encode_compound_hdr(xdr, req, &hdr);
2554 encode_sequence(xdr, &args->seq_args, &hdr);
2555 encode_putfh(xdr, args->dir_fh, &hdr);
2556 encode_secinfo(xdr, args->name, &hdr);
2557 encode_nops(&hdr);
2558 }
2559
2560 #if defined(CONFIG_NFS_V4_1)
2561 /*
2562 * EXCHANGE_ID request
2563 */
2564 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2565 struct xdr_stream *xdr,
2566 struct nfs41_exchange_id_args *args)
2567 {
2568 struct compound_hdr hdr = {
2569 .minorversion = args->client->cl_mvops->minor_version,
2570 };
2571
2572 encode_compound_hdr(xdr, req, &hdr);
2573 encode_exchange_id(xdr, args, &hdr);
2574 encode_nops(&hdr);
2575 }
2576
2577 /*
2578 * a CREATE_SESSION request
2579 */
2580 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2581 struct xdr_stream *xdr,
2582 struct nfs41_create_session_args *args)
2583 {
2584 struct compound_hdr hdr = {
2585 .minorversion = args->client->cl_mvops->minor_version,
2586 };
2587
2588 encode_compound_hdr(xdr, req, &hdr);
2589 encode_create_session(xdr, args, &hdr);
2590 encode_nops(&hdr);
2591 }
2592
2593 /*
2594 * a DESTROY_SESSION request
2595 */
2596 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2597 struct xdr_stream *xdr,
2598 struct nfs4_session *session)
2599 {
2600 struct compound_hdr hdr = {
2601 .minorversion = session->clp->cl_mvops->minor_version,
2602 };
2603
2604 encode_compound_hdr(xdr, req, &hdr);
2605 encode_destroy_session(xdr, session, &hdr);
2606 encode_nops(&hdr);
2607 }
2608
2609 /*
2610 * a SEQUENCE request
2611 */
2612 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2613 struct nfs4_sequence_args *args)
2614 {
2615 struct compound_hdr hdr = {
2616 .minorversion = nfs4_xdr_minorversion(args),
2617 };
2618
2619 encode_compound_hdr(xdr, req, &hdr);
2620 encode_sequence(xdr, args, &hdr);
2621 encode_nops(&hdr);
2622 }
2623
2624 /*
2625 * a GET_LEASE_TIME request
2626 */
2627 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2628 struct xdr_stream *xdr,
2629 struct nfs4_get_lease_time_args *args)
2630 {
2631 struct compound_hdr hdr = {
2632 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2633 };
2634 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2635
2636 encode_compound_hdr(xdr, req, &hdr);
2637 encode_sequence(xdr, &args->la_seq_args, &hdr);
2638 encode_putrootfh(xdr, &hdr);
2639 encode_fsinfo(xdr, lease_bitmap, &hdr);
2640 encode_nops(&hdr);
2641 }
2642
2643 /*
2644 * a RECLAIM_COMPLETE request
2645 */
2646 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2647 struct xdr_stream *xdr,
2648 struct nfs41_reclaim_complete_args *args)
2649 {
2650 struct compound_hdr hdr = {
2651 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2652 };
2653
2654 encode_compound_hdr(xdr, req, &hdr);
2655 encode_sequence(xdr, &args->seq_args, &hdr);
2656 encode_reclaim_complete(xdr, args, &hdr);
2657 encode_nops(&hdr);
2658 }
2659
2660 /*
2661 * Encode GETDEVICEINFO request
2662 */
2663 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 struct nfs4_getdeviceinfo_args *args)
2666 {
2667 struct compound_hdr hdr = {
2668 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669 };
2670
2671 encode_compound_hdr(xdr, req, &hdr);
2672 encode_sequence(xdr, &args->seq_args, &hdr);
2673 encode_getdeviceinfo(xdr, args, &hdr);
2674
2675 /* set up reply kvec. Subtract notification bitmap max size (2)
2676 * so that notification bitmap is put in xdr_buf tail */
2677 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2678 args->pdev->pages, args->pdev->pgbase,
2679 args->pdev->pglen);
2680
2681 encode_nops(&hdr);
2682 }
2683
2684 /*
2685 * Encode LAYOUTGET request
2686 */
2687 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2688 struct xdr_stream *xdr,
2689 struct nfs4_layoutget_args *args)
2690 {
2691 struct compound_hdr hdr = {
2692 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2693 };
2694
2695 encode_compound_hdr(xdr, req, &hdr);
2696 encode_sequence(xdr, &args->seq_args, &hdr);
2697 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2698 encode_layoutget(xdr, args, &hdr);
2699
2700 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2701 args->layout.pages, 0, args->layout.pglen);
2702
2703 encode_nops(&hdr);
2704 }
2705
2706 /*
2707 * Encode LAYOUTCOMMIT request
2708 */
2709 static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2710 struct xdr_stream *xdr,
2711 struct nfs4_layoutcommit_args *args)
2712 {
2713 struct compound_hdr hdr = {
2714 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2715 };
2716
2717 encode_compound_hdr(xdr, req, &hdr);
2718 encode_sequence(xdr, &args->seq_args, &hdr);
2719 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2720 encode_layoutcommit(xdr, args, &hdr);
2721 encode_getfattr(xdr, args->bitmask, &hdr);
2722 encode_nops(&hdr);
2723 return 0;
2724 }
2725 #endif /* CONFIG_NFS_V4_1 */
2726
2727 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2728 {
2729 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2730 "Remaining buffer length is %tu words.\n",
2731 func, xdr->end - xdr->p);
2732 }
2733
2734 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2735 {
2736 __be32 *p;
2737
2738 p = xdr_inline_decode(xdr, 4);
2739 if (unlikely(!p))
2740 goto out_overflow;
2741 *len = be32_to_cpup(p);
2742 p = xdr_inline_decode(xdr, *len);
2743 if (unlikely(!p))
2744 goto out_overflow;
2745 *string = (char *)p;
2746 return 0;
2747 out_overflow:
2748 print_overflow_msg(__func__, xdr);
2749 return -EIO;
2750 }
2751
2752 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2753 {
2754 __be32 *p;
2755
2756 p = xdr_inline_decode(xdr, 8);
2757 if (unlikely(!p))
2758 goto out_overflow;
2759 hdr->status = be32_to_cpup(p++);
2760 hdr->taglen = be32_to_cpup(p);
2761
2762 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2763 if (unlikely(!p))
2764 goto out_overflow;
2765 hdr->tag = (char *)p;
2766 p += XDR_QUADLEN(hdr->taglen);
2767 hdr->nops = be32_to_cpup(p);
2768 if (unlikely(hdr->nops < 1))
2769 return nfs4_stat_to_errno(hdr->status);
2770 return 0;
2771 out_overflow:
2772 print_overflow_msg(__func__, xdr);
2773 return -EIO;
2774 }
2775
2776 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2777 {
2778 __be32 *p;
2779 uint32_t opnum;
2780 int32_t nfserr;
2781
2782 p = xdr_inline_decode(xdr, 8);
2783 if (unlikely(!p))
2784 goto out_overflow;
2785 opnum = be32_to_cpup(p++);
2786 if (opnum != expected) {
2787 dprintk("nfs: Server returned operation"
2788 " %d but we issued a request for %d\n",
2789 opnum, expected);
2790 return -EIO;
2791 }
2792 nfserr = be32_to_cpup(p);
2793 if (nfserr != NFS_OK)
2794 return nfs4_stat_to_errno(nfserr);
2795 return 0;
2796 out_overflow:
2797 print_overflow_msg(__func__, xdr);
2798 return -EIO;
2799 }
2800
2801 /* Dummy routine */
2802 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2803 {
2804 __be32 *p;
2805 unsigned int strlen;
2806 char *str;
2807
2808 p = xdr_inline_decode(xdr, 12);
2809 if (likely(p))
2810 return decode_opaque_inline(xdr, &strlen, &str);
2811 print_overflow_msg(__func__, xdr);
2812 return -EIO;
2813 }
2814
2815 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2816 {
2817 uint32_t bmlen;
2818 __be32 *p;
2819
2820 p = xdr_inline_decode(xdr, 4);
2821 if (unlikely(!p))
2822 goto out_overflow;
2823 bmlen = be32_to_cpup(p);
2824
2825 bitmap[0] = bitmap[1] = 0;
2826 p = xdr_inline_decode(xdr, (bmlen << 2));
2827 if (unlikely(!p))
2828 goto out_overflow;
2829 if (bmlen > 0) {
2830 bitmap[0] = be32_to_cpup(p++);
2831 if (bmlen > 1)
2832 bitmap[1] = be32_to_cpup(p);
2833 }
2834 return 0;
2835 out_overflow:
2836 print_overflow_msg(__func__, xdr);
2837 return -EIO;
2838 }
2839
2840 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2841 {
2842 __be32 *p;
2843
2844 p = xdr_inline_decode(xdr, 4);
2845 if (unlikely(!p))
2846 goto out_overflow;
2847 *attrlen = be32_to_cpup(p);
2848 *savep = xdr->p;
2849 return 0;
2850 out_overflow:
2851 print_overflow_msg(__func__, xdr);
2852 return -EIO;
2853 }
2854
2855 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2856 {
2857 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2858 int ret;
2859 ret = decode_attr_bitmap(xdr, bitmask);
2860 if (unlikely(ret < 0))
2861 return ret;
2862 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2863 } else
2864 bitmask[0] = bitmask[1] = 0;
2865 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2866 return 0;
2867 }
2868
2869 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2870 {
2871 __be32 *p;
2872 int ret = 0;
2873
2874 *type = 0;
2875 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2876 return -EIO;
2877 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2878 p = xdr_inline_decode(xdr, 4);
2879 if (unlikely(!p))
2880 goto out_overflow;
2881 *type = be32_to_cpup(p);
2882 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2883 dprintk("%s: bad type %d\n", __func__, *type);
2884 return -EIO;
2885 }
2886 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2887 ret = NFS_ATTR_FATTR_TYPE;
2888 }
2889 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2890 return ret;
2891 out_overflow:
2892 print_overflow_msg(__func__, xdr);
2893 return -EIO;
2894 }
2895
2896 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2897 {
2898 __be32 *p;
2899 int ret = 0;
2900
2901 *change = 0;
2902 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2903 return -EIO;
2904 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2905 p = xdr_inline_decode(xdr, 8);
2906 if (unlikely(!p))
2907 goto out_overflow;
2908 xdr_decode_hyper(p, change);
2909 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2910 ret = NFS_ATTR_FATTR_CHANGE;
2911 }
2912 dprintk("%s: change attribute=%Lu\n", __func__,
2913 (unsigned long long)*change);
2914 return ret;
2915 out_overflow:
2916 print_overflow_msg(__func__, xdr);
2917 return -EIO;
2918 }
2919
2920 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2921 {
2922 __be32 *p;
2923 int ret = 0;
2924
2925 *size = 0;
2926 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2927 return -EIO;
2928 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2929 p = xdr_inline_decode(xdr, 8);
2930 if (unlikely(!p))
2931 goto out_overflow;
2932 xdr_decode_hyper(p, size);
2933 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2934 ret = NFS_ATTR_FATTR_SIZE;
2935 }
2936 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2937 return ret;
2938 out_overflow:
2939 print_overflow_msg(__func__, xdr);
2940 return -EIO;
2941 }
2942
2943 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2944 {
2945 __be32 *p;
2946
2947 *res = 0;
2948 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2949 return -EIO;
2950 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2951 p = xdr_inline_decode(xdr, 4);
2952 if (unlikely(!p))
2953 goto out_overflow;
2954 *res = be32_to_cpup(p);
2955 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2956 }
2957 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2958 return 0;
2959 out_overflow:
2960 print_overflow_msg(__func__, xdr);
2961 return -EIO;
2962 }
2963
2964 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2965 {
2966 __be32 *p;
2967
2968 *res = 0;
2969 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2970 return -EIO;
2971 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2972 p = xdr_inline_decode(xdr, 4);
2973 if (unlikely(!p))
2974 goto out_overflow;
2975 *res = be32_to_cpup(p);
2976 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2977 }
2978 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2979 return 0;
2980 out_overflow:
2981 print_overflow_msg(__func__, xdr);
2982 return -EIO;
2983 }
2984
2985 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2986 {
2987 __be32 *p;
2988 int ret = 0;
2989
2990 fsid->major = 0;
2991 fsid->minor = 0;
2992 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2993 return -EIO;
2994 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2995 p = xdr_inline_decode(xdr, 16);
2996 if (unlikely(!p))
2997 goto out_overflow;
2998 p = xdr_decode_hyper(p, &fsid->major);
2999 xdr_decode_hyper(p, &fsid->minor);
3000 bitmap[0] &= ~FATTR4_WORD0_FSID;
3001 ret = NFS_ATTR_FATTR_FSID;
3002 }
3003 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3004 (unsigned long long)fsid->major,
3005 (unsigned long long)fsid->minor);
3006 return ret;
3007 out_overflow:
3008 print_overflow_msg(__func__, xdr);
3009 return -EIO;
3010 }
3011
3012 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3013 {
3014 __be32 *p;
3015
3016 *res = 60;
3017 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3018 return -EIO;
3019 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3020 p = xdr_inline_decode(xdr, 4);
3021 if (unlikely(!p))
3022 goto out_overflow;
3023 *res = be32_to_cpup(p);
3024 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3025 }
3026 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3027 return 0;
3028 out_overflow:
3029 print_overflow_msg(__func__, xdr);
3030 return -EIO;
3031 }
3032
3033 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
3034 {
3035 __be32 *p;
3036
3037 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3038 return -EIO;
3039 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3040 p = xdr_inline_decode(xdr, 4);
3041 if (unlikely(!p))
3042 goto out_overflow;
3043 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3044 return -be32_to_cpup(p);
3045 }
3046 return 0;
3047 out_overflow:
3048 print_overflow_msg(__func__, xdr);
3049 return -EIO;
3050 }
3051
3052 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3053 {
3054 __be32 *p;
3055 int len;
3056
3057 if (fh != NULL)
3058 memset(fh, 0, sizeof(*fh));
3059
3060 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3061 return -EIO;
3062 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3063 p = xdr_inline_decode(xdr, 4);
3064 if (unlikely(!p))
3065 goto out_overflow;
3066 len = be32_to_cpup(p);
3067 if (len > NFS4_FHSIZE)
3068 return -EIO;
3069 p = xdr_inline_decode(xdr, len);
3070 if (unlikely(!p))
3071 goto out_overflow;
3072 if (fh != NULL) {
3073 memcpy(fh->data, p, len);
3074 fh->size = len;
3075 }
3076 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3077 }
3078 return 0;
3079 out_overflow:
3080 print_overflow_msg(__func__, xdr);
3081 return -EIO;
3082 }
3083
3084 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3085 {
3086 __be32 *p;
3087
3088 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3089 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3090 return -EIO;
3091 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3092 p = xdr_inline_decode(xdr, 4);
3093 if (unlikely(!p))
3094 goto out_overflow;
3095 *res = be32_to_cpup(p);
3096 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3097 }
3098 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3099 return 0;
3100 out_overflow:
3101 print_overflow_msg(__func__, xdr);
3102 return -EIO;
3103 }
3104
3105 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3106 {
3107 __be32 *p;
3108 int ret = 0;
3109
3110 *fileid = 0;
3111 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3112 return -EIO;
3113 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3114 p = xdr_inline_decode(xdr, 8);
3115 if (unlikely(!p))
3116 goto out_overflow;
3117 xdr_decode_hyper(p, fileid);
3118 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3119 ret = NFS_ATTR_FATTR_FILEID;
3120 }
3121 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3122 return ret;
3123 out_overflow:
3124 print_overflow_msg(__func__, xdr);
3125 return -EIO;
3126 }
3127
3128 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3129 {
3130 __be32 *p;
3131 int ret = 0;
3132
3133 *fileid = 0;
3134 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3135 return -EIO;
3136 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3137 p = xdr_inline_decode(xdr, 8);
3138 if (unlikely(!p))
3139 goto out_overflow;
3140 xdr_decode_hyper(p, fileid);
3141 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3142 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3143 }
3144 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3145 return ret;
3146 out_overflow:
3147 print_overflow_msg(__func__, xdr);
3148 return -EIO;
3149 }
3150
3151 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3152 {
3153 __be32 *p;
3154 int status = 0;
3155
3156 *res = 0;
3157 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3158 return -EIO;
3159 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3160 p = xdr_inline_decode(xdr, 8);
3161 if (unlikely(!p))
3162 goto out_overflow;
3163 xdr_decode_hyper(p, res);
3164 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3165 }
3166 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3167 return status;
3168 out_overflow:
3169 print_overflow_msg(__func__, xdr);
3170 return -EIO;
3171 }
3172
3173 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3174 {
3175 __be32 *p;
3176 int status = 0;
3177
3178 *res = 0;
3179 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3180 return -EIO;
3181 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3182 p = xdr_inline_decode(xdr, 8);
3183 if (unlikely(!p))
3184 goto out_overflow;
3185 xdr_decode_hyper(p, res);
3186 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3187 }
3188 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3189 return status;
3190 out_overflow:
3191 print_overflow_msg(__func__, xdr);
3192 return -EIO;
3193 }
3194
3195 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3196 {
3197 __be32 *p;
3198 int status = 0;
3199
3200 *res = 0;
3201 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3202 return -EIO;
3203 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3204 p = xdr_inline_decode(xdr, 8);
3205 if (unlikely(!p))
3206 goto out_overflow;
3207 xdr_decode_hyper(p, res);
3208 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3209 }
3210 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3211 return status;
3212 out_overflow:
3213 print_overflow_msg(__func__, xdr);
3214 return -EIO;
3215 }
3216
3217 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3218 {
3219 u32 n;
3220 __be32 *p;
3221 int status = 0;
3222
3223 p = xdr_inline_decode(xdr, 4);
3224 if (unlikely(!p))
3225 goto out_overflow;
3226 n = be32_to_cpup(p);
3227 if (n == 0)
3228 goto root_path;
3229 dprintk("path ");
3230 path->ncomponents = 0;
3231 while (path->ncomponents < n) {
3232 struct nfs4_string *component = &path->components[path->ncomponents];
3233 status = decode_opaque_inline(xdr, &component->len, &component->data);
3234 if (unlikely(status != 0))
3235 goto out_eio;
3236 if (path->ncomponents != n)
3237 dprintk("/");
3238 dprintk("%s", component->data);
3239 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3240 path->ncomponents++;
3241 else {
3242 dprintk("cannot parse %d components in path\n", n);
3243 goto out_eio;
3244 }
3245 }
3246 out:
3247 dprintk("\n");
3248 return status;
3249 root_path:
3250 /* a root pathname is sent as a zero component4 */
3251 path->ncomponents = 1;
3252 path->components[0].len=0;
3253 path->components[0].data=NULL;
3254 dprintk("path /\n");
3255 goto out;
3256 out_eio:
3257 dprintk(" status %d", status);
3258 status = -EIO;
3259 goto out;
3260 out_overflow:
3261 print_overflow_msg(__func__, xdr);
3262 return -EIO;
3263 }
3264
3265 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3266 {
3267 int n;
3268 __be32 *p;
3269 int status = -EIO;
3270
3271 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3272 goto out;
3273 status = 0;
3274 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3275 goto out;
3276 dprintk("%s: fsroot ", __func__);
3277 status = decode_pathname(xdr, &res->fs_path);
3278 if (unlikely(status != 0))
3279 goto out;
3280 p = xdr_inline_decode(xdr, 4);
3281 if (unlikely(!p))
3282 goto out_overflow;
3283 n = be32_to_cpup(p);
3284 if (n <= 0)
3285 goto out_eio;
3286 res->nlocations = 0;
3287 while (res->nlocations < n) {
3288 u32 m;
3289 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3290
3291 p = xdr_inline_decode(xdr, 4);
3292 if (unlikely(!p))
3293 goto out_overflow;
3294 m = be32_to_cpup(p);
3295
3296 loc->nservers = 0;
3297 dprintk("%s: servers ", __func__);
3298 while (loc->nservers < m) {
3299 struct nfs4_string *server = &loc->servers[loc->nservers];
3300 status = decode_opaque_inline(xdr, &server->len, &server->data);
3301 if (unlikely(status != 0))
3302 goto out_eio;
3303 dprintk("%s ", server->data);
3304 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3305 loc->nservers++;
3306 else {
3307 unsigned int i;
3308 dprintk("%s: using first %u of %u servers "
3309 "returned for location %u\n",
3310 __func__,
3311 NFS4_FS_LOCATION_MAXSERVERS,
3312 m, res->nlocations);
3313 for (i = loc->nservers; i < m; i++) {
3314 unsigned int len;
3315 char *data;
3316 status = decode_opaque_inline(xdr, &len, &data);
3317 if (unlikely(status != 0))
3318 goto out_eio;
3319 }
3320 }
3321 }
3322 status = decode_pathname(xdr, &loc->rootpath);
3323 if (unlikely(status != 0))
3324 goto out_eio;
3325 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3326 res->nlocations++;
3327 }
3328 if (res->nlocations != 0)
3329 status = NFS_ATTR_FATTR_V4_REFERRAL;
3330 out:
3331 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3332 return status;
3333 out_overflow:
3334 print_overflow_msg(__func__, xdr);
3335 out_eio:
3336 status = -EIO;
3337 goto out;
3338 }
3339
3340 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3341 {
3342 __be32 *p;
3343 int status = 0;
3344
3345 *res = 0;
3346 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3347 return -EIO;
3348 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3349 p = xdr_inline_decode(xdr, 8);
3350 if (unlikely(!p))
3351 goto out_overflow;
3352 xdr_decode_hyper(p, res);
3353 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3354 }
3355 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3356 return status;
3357 out_overflow:
3358 print_overflow_msg(__func__, xdr);
3359 return -EIO;
3360 }
3361
3362 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3363 {
3364 __be32 *p;
3365 int status = 0;
3366
3367 *maxlink = 1;
3368 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3369 return -EIO;
3370 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3371 p = xdr_inline_decode(xdr, 4);
3372 if (unlikely(!p))
3373 goto out_overflow;
3374 *maxlink = be32_to_cpup(p);
3375 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3376 }
3377 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3378 return status;
3379 out_overflow:
3380 print_overflow_msg(__func__, xdr);
3381 return -EIO;
3382 }
3383
3384 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3385 {
3386 __be32 *p;
3387 int status = 0;
3388
3389 *maxname = 1024;
3390 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3391 return -EIO;
3392 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3393 p = xdr_inline_decode(xdr, 4);
3394 if (unlikely(!p))
3395 goto out_overflow;
3396 *maxname = be32_to_cpup(p);
3397 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3398 }
3399 dprintk("%s: maxname=%u\n", __func__, *maxname);
3400 return status;
3401 out_overflow:
3402 print_overflow_msg(__func__, xdr);
3403 return -EIO;
3404 }
3405
3406 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3407 {
3408 __be32 *p;
3409 int status = 0;
3410
3411 *res = 1024;
3412 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3413 return -EIO;
3414 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3415 uint64_t maxread;
3416 p = xdr_inline_decode(xdr, 8);
3417 if (unlikely(!p))
3418 goto out_overflow;
3419 xdr_decode_hyper(p, &maxread);
3420 if (maxread > 0x7FFFFFFF)
3421 maxread = 0x7FFFFFFF;
3422 *res = (uint32_t)maxread;
3423 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3424 }
3425 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3426 return status;
3427 out_overflow:
3428 print_overflow_msg(__func__, xdr);
3429 return -EIO;
3430 }
3431
3432 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3433 {
3434 __be32 *p;
3435 int status = 0;
3436
3437 *res = 1024;
3438 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3439 return -EIO;
3440 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3441 uint64_t maxwrite;
3442 p = xdr_inline_decode(xdr, 8);
3443 if (unlikely(!p))
3444 goto out_overflow;
3445 xdr_decode_hyper(p, &maxwrite);
3446 if (maxwrite > 0x7FFFFFFF)
3447 maxwrite = 0x7FFFFFFF;
3448 *res = (uint32_t)maxwrite;
3449 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3450 }
3451 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3452 return status;
3453 out_overflow:
3454 print_overflow_msg(__func__, xdr);
3455 return -EIO;
3456 }
3457
3458 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3459 {
3460 uint32_t tmp;
3461 __be32 *p;
3462 int ret = 0;
3463
3464 *mode = 0;
3465 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3466 return -EIO;
3467 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3468 p = xdr_inline_decode(xdr, 4);
3469 if (unlikely(!p))
3470 goto out_overflow;
3471 tmp = be32_to_cpup(p);
3472 *mode = tmp & ~S_IFMT;
3473 bitmap[1] &= ~FATTR4_WORD1_MODE;
3474 ret = NFS_ATTR_FATTR_MODE;
3475 }
3476 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3477 return ret;
3478 out_overflow:
3479 print_overflow_msg(__func__, xdr);
3480 return -EIO;
3481 }
3482
3483 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3484 {
3485 __be32 *p;
3486 int ret = 0;
3487
3488 *nlink = 1;
3489 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3490 return -EIO;
3491 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3492 p = xdr_inline_decode(xdr, 4);
3493 if (unlikely(!p))
3494 goto out_overflow;
3495 *nlink = be32_to_cpup(p);
3496 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3497 ret = NFS_ATTR_FATTR_NLINK;
3498 }
3499 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3500 return ret;
3501 out_overflow:
3502 print_overflow_msg(__func__, xdr);
3503 return -EIO;
3504 }
3505
3506 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3507 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3508 {
3509 uint32_t len;
3510 __be32 *p;
3511 int ret = 0;
3512
3513 *uid = -2;
3514 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3515 return -EIO;
3516 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3517 p = xdr_inline_decode(xdr, 4);
3518 if (unlikely(!p))
3519 goto out_overflow;
3520 len = be32_to_cpup(p);
3521 p = xdr_inline_decode(xdr, len);
3522 if (unlikely(!p))
3523 goto out_overflow;
3524 if (!may_sleep) {
3525 /* do nothing */
3526 } else if (len < XDR_MAX_NETOBJ) {
3527 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3528 ret = NFS_ATTR_FATTR_OWNER;
3529 else
3530 dprintk("%s: nfs_map_name_to_uid failed!\n",
3531 __func__);
3532 } else
3533 dprintk("%s: name too long (%u)!\n",
3534 __func__, len);
3535 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3536 }
3537 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3538 return ret;
3539 out_overflow:
3540 print_overflow_msg(__func__, xdr);
3541 return -EIO;
3542 }
3543
3544 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3545 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3546 {
3547 uint32_t len;
3548 __be32 *p;
3549 int ret = 0;
3550
3551 *gid = -2;
3552 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3553 return -EIO;
3554 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3555 p = xdr_inline_decode(xdr, 4);
3556 if (unlikely(!p))
3557 goto out_overflow;
3558 len = be32_to_cpup(p);
3559 p = xdr_inline_decode(xdr, len);
3560 if (unlikely(!p))
3561 goto out_overflow;
3562 if (!may_sleep) {
3563 /* do nothing */
3564 } else if (len < XDR_MAX_NETOBJ) {
3565 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3566 ret = NFS_ATTR_FATTR_GROUP;
3567 else
3568 dprintk("%s: nfs_map_group_to_gid failed!\n",
3569 __func__);
3570 } else
3571 dprintk("%s: name too long (%u)!\n",
3572 __func__, len);
3573 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3574 }
3575 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3576 return ret;
3577 out_overflow:
3578 print_overflow_msg(__func__, xdr);
3579 return -EIO;
3580 }
3581
3582 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3583 {
3584 uint32_t major = 0, minor = 0;
3585 __be32 *p;
3586 int ret = 0;
3587
3588 *rdev = MKDEV(0,0);
3589 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3590 return -EIO;
3591 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3592 dev_t tmp;
3593
3594 p = xdr_inline_decode(xdr, 8);
3595 if (unlikely(!p))
3596 goto out_overflow;
3597 major = be32_to_cpup(p++);
3598 minor = be32_to_cpup(p);
3599 tmp = MKDEV(major, minor);
3600 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3601 *rdev = tmp;
3602 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3603 ret = NFS_ATTR_FATTR_RDEV;
3604 }
3605 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3606 return ret;
3607 out_overflow:
3608 print_overflow_msg(__func__, xdr);
3609 return -EIO;
3610 }
3611
3612 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3613 {
3614 __be32 *p;
3615 int status = 0;
3616
3617 *res = 0;
3618 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3619 return -EIO;
3620 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3621 p = xdr_inline_decode(xdr, 8);
3622 if (unlikely(!p))
3623 goto out_overflow;
3624 xdr_decode_hyper(p, res);
3625 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3626 }
3627 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3628 return status;
3629 out_overflow:
3630 print_overflow_msg(__func__, xdr);
3631 return -EIO;
3632 }
3633
3634 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3635 {
3636 __be32 *p;
3637 int status = 0;
3638
3639 *res = 0;
3640 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3641 return -EIO;
3642 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3643 p = xdr_inline_decode(xdr, 8);
3644 if (unlikely(!p))
3645 goto out_overflow;
3646 xdr_decode_hyper(p, res);
3647 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3648 }
3649 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3650 return status;
3651 out_overflow:
3652 print_overflow_msg(__func__, xdr);
3653 return -EIO;
3654 }
3655
3656 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3657 {
3658 __be32 *p;
3659 int status = 0;
3660
3661 *res = 0;
3662 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3663 return -EIO;
3664 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3665 p = xdr_inline_decode(xdr, 8);
3666 if (unlikely(!p))
3667 goto out_overflow;
3668 xdr_decode_hyper(p, res);
3669 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3670 }
3671 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3672 return status;
3673 out_overflow:
3674 print_overflow_msg(__func__, xdr);
3675 return -EIO;
3676 }
3677
3678 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3679 {
3680 __be32 *p;
3681 int ret = 0;
3682
3683 *used = 0;
3684 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3685 return -EIO;
3686 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3687 p = xdr_inline_decode(xdr, 8);
3688 if (unlikely(!p))
3689 goto out_overflow;
3690 xdr_decode_hyper(p, used);
3691 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3692 ret = NFS_ATTR_FATTR_SPACE_USED;
3693 }
3694 dprintk("%s: space used=%Lu\n", __func__,
3695 (unsigned long long)*used);
3696 return ret;
3697 out_overflow:
3698 print_overflow_msg(__func__, xdr);
3699 return -EIO;
3700 }
3701
3702 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3703 {
3704 __be32 *p;
3705 uint64_t sec;
3706 uint32_t nsec;
3707
3708 p = xdr_inline_decode(xdr, 12);
3709 if (unlikely(!p))
3710 goto out_overflow;
3711 p = xdr_decode_hyper(p, &sec);
3712 nsec = be32_to_cpup(p);
3713 time->tv_sec = (time_t)sec;
3714 time->tv_nsec = (long)nsec;
3715 return 0;
3716 out_overflow:
3717 print_overflow_msg(__func__, xdr);
3718 return -EIO;
3719 }
3720
3721 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3722 {
3723 int status = 0;
3724
3725 time->tv_sec = 0;
3726 time->tv_nsec = 0;
3727 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3728 return -EIO;
3729 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3730 status = decode_attr_time(xdr, time);
3731 if (status == 0)
3732 status = NFS_ATTR_FATTR_ATIME;
3733 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3734 }
3735 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3736 return status;
3737 }
3738
3739 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3740 {
3741 int status = 0;
3742
3743 time->tv_sec = 0;
3744 time->tv_nsec = 0;
3745 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3746 return -EIO;
3747 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3748 status = decode_attr_time(xdr, time);
3749 if (status == 0)
3750 status = NFS_ATTR_FATTR_CTIME;
3751 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3752 }
3753 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3754 return status;
3755 }
3756
3757 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3758 struct timespec *time)
3759 {
3760 int status = 0;
3761
3762 time->tv_sec = 0;
3763 time->tv_nsec = 0;
3764 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3765 return -EIO;
3766 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3767 status = decode_attr_time(xdr, time);
3768 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3769 }
3770 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3771 (long)time->tv_nsec);
3772 return status;
3773 }
3774
3775 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3776 {
3777 int status = 0;
3778
3779 time->tv_sec = 0;
3780 time->tv_nsec = 0;
3781 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3782 return -EIO;
3783 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3784 status = decode_attr_time(xdr, time);
3785 if (status == 0)
3786 status = NFS_ATTR_FATTR_MTIME;
3787 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3788 }
3789 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3790 return status;
3791 }
3792
3793 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3794 {
3795 unsigned int attrwords = XDR_QUADLEN(attrlen);
3796 unsigned int nwords = xdr->p - savep;
3797
3798 if (unlikely(attrwords != nwords)) {
3799 dprintk("%s: server returned incorrect attribute length: "
3800 "%u %c %u\n",
3801 __func__,
3802 attrwords << 2,
3803 (attrwords < nwords) ? '<' : '>',
3804 nwords << 2);
3805 return -EIO;
3806 }
3807 return 0;
3808 }
3809
3810 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3811 {
3812 __be32 *p;
3813
3814 p = xdr_inline_decode(xdr, 20);
3815 if (unlikely(!p))
3816 goto out_overflow;
3817 cinfo->atomic = be32_to_cpup(p++);
3818 p = xdr_decode_hyper(p, &cinfo->before);
3819 xdr_decode_hyper(p, &cinfo->after);
3820 return 0;
3821 out_overflow:
3822 print_overflow_msg(__func__, xdr);
3823 return -EIO;
3824 }
3825
3826 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3827 {
3828 __be32 *p;
3829 uint32_t supp, acc;
3830 int status;
3831
3832 status = decode_op_hdr(xdr, OP_ACCESS);
3833 if (status)
3834 return status;
3835 p = xdr_inline_decode(xdr, 8);
3836 if (unlikely(!p))
3837 goto out_overflow;
3838 supp = be32_to_cpup(p++);
3839 acc = be32_to_cpup(p);
3840 access->supported = supp;
3841 access->access = acc;
3842 return 0;
3843 out_overflow:
3844 print_overflow_msg(__func__, xdr);
3845 return -EIO;
3846 }
3847
3848 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3849 {
3850 __be32 *p;
3851
3852 p = xdr_inline_decode(xdr, len);
3853 if (likely(p)) {
3854 memcpy(buf, p, len);
3855 return 0;
3856 }
3857 print_overflow_msg(__func__, xdr);
3858 return -EIO;
3859 }
3860
3861 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3862 {
3863 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3864 }
3865
3866 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3867 {
3868 int status;
3869
3870 status = decode_op_hdr(xdr, OP_CLOSE);
3871 if (status != -EIO)
3872 nfs_increment_open_seqid(status, res->seqid);
3873 if (!status)
3874 status = decode_stateid(xdr, &res->stateid);
3875 return status;
3876 }
3877
3878 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3879 {
3880 return decode_opaque_fixed(xdr, verifier, 8);
3881 }
3882
3883 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3884 {
3885 int status;
3886
3887 status = decode_op_hdr(xdr, OP_COMMIT);
3888 if (!status)
3889 status = decode_verifier(xdr, res->verf->verifier);
3890 return status;
3891 }
3892
3893 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3894 {
3895 __be32 *p;
3896 uint32_t bmlen;
3897 int status;
3898
3899 status = decode_op_hdr(xdr, OP_CREATE);
3900 if (status)
3901 return status;
3902 if ((status = decode_change_info(xdr, cinfo)))
3903 return status;
3904 p = xdr_inline_decode(xdr, 4);
3905 if (unlikely(!p))
3906 goto out_overflow;
3907 bmlen = be32_to_cpup(p);
3908 p = xdr_inline_decode(xdr, bmlen << 2);
3909 if (likely(p))
3910 return 0;
3911 out_overflow:
3912 print_overflow_msg(__func__, xdr);
3913 return -EIO;
3914 }
3915
3916 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3917 {
3918 __be32 *savep;
3919 uint32_t attrlen, bitmap[2] = {0};
3920 int status;
3921
3922 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3923 goto xdr_error;
3924 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3925 goto xdr_error;
3926 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3927 goto xdr_error;
3928 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3929 goto xdr_error;
3930 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3931 goto xdr_error;
3932 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3933 goto xdr_error;
3934 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3935 goto xdr_error;
3936 status = verify_attr_len(xdr, savep, attrlen);
3937 xdr_error:
3938 dprintk("%s: xdr returned %d!\n", __func__, -status);
3939 return status;
3940 }
3941
3942 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3943 {
3944 __be32 *savep;
3945 uint32_t attrlen, bitmap[2] = {0};
3946 int status;
3947
3948 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3949 goto xdr_error;
3950 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3951 goto xdr_error;
3952 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3953 goto xdr_error;
3954
3955 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3956 goto xdr_error;
3957 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3958 goto xdr_error;
3959 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3960 goto xdr_error;
3961 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3962 goto xdr_error;
3963 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3964 goto xdr_error;
3965 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3966 goto xdr_error;
3967
3968 status = verify_attr_len(xdr, savep, attrlen);
3969 xdr_error:
3970 dprintk("%s: xdr returned %d!\n", __func__, -status);
3971 return status;
3972 }
3973
3974 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3975 {
3976 __be32 *savep;
3977 uint32_t attrlen, bitmap[2] = {0};
3978 int status;
3979
3980 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3981 goto xdr_error;
3982 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3983 goto xdr_error;
3984 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3985 goto xdr_error;
3986
3987 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3988 goto xdr_error;
3989 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3990 goto xdr_error;
3991
3992 status = verify_attr_len(xdr, savep, attrlen);
3993 xdr_error:
3994 dprintk("%s: xdr returned %d!\n", __func__, -status);
3995 return status;
3996 }
3997
3998 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3999 struct nfs_fattr *fattr, struct nfs_fh *fh,
4000 const struct nfs_server *server, int may_sleep)
4001 {
4002 int status;
4003 umode_t fmode = 0;
4004 uint32_t type;
4005
4006 status = decode_attr_type(xdr, bitmap, &type);
4007 if (status < 0)
4008 goto xdr_error;
4009 fattr->mode = 0;
4010 if (status != 0) {
4011 fattr->mode |= nfs_type2fmt[type];
4012 fattr->valid |= status;
4013 }
4014
4015 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4016 if (status < 0)
4017 goto xdr_error;
4018 fattr->valid |= status;
4019
4020 status = decode_attr_size(xdr, bitmap, &fattr->size);
4021 if (status < 0)
4022 goto xdr_error;
4023 fattr->valid |= status;
4024
4025 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4026 if (status < 0)
4027 goto xdr_error;
4028 fattr->valid |= status;
4029
4030 status = decode_attr_error(xdr, bitmap);
4031 if (status == -NFS4ERR_WRONGSEC) {
4032 nfs_fixup_secinfo_attributes(fattr, fh);
4033 status = 0;
4034 }
4035 if (status < 0)
4036 goto xdr_error;
4037
4038 status = decode_attr_filehandle(xdr, bitmap, fh);
4039 if (status < 0)
4040 goto xdr_error;
4041
4042 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4043 if (status < 0)
4044 goto xdr_error;
4045 fattr->valid |= status;
4046
4047 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4048 struct nfs4_fs_locations,
4049 fattr));
4050 if (status < 0)
4051 goto xdr_error;
4052 fattr->valid |= status;
4053
4054 status = decode_attr_mode(xdr, bitmap, &fmode);
4055 if (status < 0)
4056 goto xdr_error;
4057 if (status != 0) {
4058 fattr->mode |= fmode;
4059 fattr->valid |= status;
4060 }
4061
4062 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4063 if (status < 0)
4064 goto xdr_error;
4065 fattr->valid |= status;
4066
4067 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4068 if (status < 0)
4069 goto xdr_error;
4070 fattr->valid |= status;
4071
4072 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4073 if (status < 0)
4074 goto xdr_error;
4075 fattr->valid |= status;
4076
4077 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4078 if (status < 0)
4079 goto xdr_error;
4080 fattr->valid |= status;
4081
4082 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4083 if (status < 0)
4084 goto xdr_error;
4085 fattr->valid |= status;
4086
4087 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4088 if (status < 0)
4089 goto xdr_error;
4090 fattr->valid |= status;
4091
4092 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4093 if (status < 0)
4094 goto xdr_error;
4095 fattr->valid |= status;
4096
4097 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4098 if (status < 0)
4099 goto xdr_error;
4100 fattr->valid |= status;
4101
4102 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4103 if (status < 0)
4104 goto xdr_error;
4105 fattr->valid |= status;
4106
4107 xdr_error:
4108 dprintk("%s: xdr returned %d\n", __func__, -status);
4109 return status;
4110 }
4111
4112 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4113 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4114 {
4115 __be32 *savep;
4116 uint32_t attrlen,
4117 bitmap[2] = {0};
4118 int status;
4119
4120 status = decode_op_hdr(xdr, OP_GETATTR);
4121 if (status < 0)
4122 goto xdr_error;
4123
4124 status = decode_attr_bitmap(xdr, bitmap);
4125 if (status < 0)
4126 goto xdr_error;
4127
4128 status = decode_attr_length(xdr, &attrlen, &savep);
4129 if (status < 0)
4130 goto xdr_error;
4131
4132 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4133 if (status < 0)
4134 goto xdr_error;
4135
4136 status = verify_attr_len(xdr, savep, attrlen);
4137 xdr_error:
4138 dprintk("%s: xdr returned %d\n", __func__, -status);
4139 return status;
4140 }
4141
4142 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4143 const struct nfs_server *server, int may_sleep)
4144 {
4145 return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4146 }
4147
4148 /*
4149 * Decode potentially multiple layout types. Currently we only support
4150 * one layout driver per file system.
4151 */
4152 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4153 uint32_t *layouttype)
4154 {
4155 uint32_t *p;
4156 int num;
4157
4158 p = xdr_inline_decode(xdr, 4);
4159 if (unlikely(!p))
4160 goto out_overflow;
4161 num = be32_to_cpup(p);
4162
4163 /* pNFS is not supported by the underlying file system */
4164 if (num == 0) {
4165 *layouttype = 0;
4166 return 0;
4167 }
4168 if (num > 1)
4169 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4170 "per filesystem not supported\n", __func__);
4171
4172 /* Decode and set first layout type, move xdr->p past unused types */
4173 p = xdr_inline_decode(xdr, num * 4);
4174 if (unlikely(!p))
4175 goto out_overflow;
4176 *layouttype = be32_to_cpup(p);
4177 return 0;
4178 out_overflow:
4179 print_overflow_msg(__func__, xdr);
4180 return -EIO;
4181 }
4182
4183 /*
4184 * The type of file system exported.
4185 * Note we must ensure that layouttype is set in any non-error case.
4186 */
4187 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4188 uint32_t *layouttype)
4189 {
4190 int status = 0;
4191
4192 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4193 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4194 return -EIO;
4195 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4196 status = decode_first_pnfs_layout_type(xdr, layouttype);
4197 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4198 } else
4199 *layouttype = 0;
4200 return status;
4201 }
4202
4203 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4204 {
4205 __be32 *savep;
4206 uint32_t attrlen, bitmap[2];
4207 int status;
4208
4209 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4210 goto xdr_error;
4211 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4212 goto xdr_error;
4213 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4214 goto xdr_error;
4215
4216 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4217
4218 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4219 goto xdr_error;
4220 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4221 goto xdr_error;
4222 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4223 goto xdr_error;
4224 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4225 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4226 goto xdr_error;
4227 fsinfo->wtpref = fsinfo->wtmax;
4228 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4229 if (status != 0)
4230 goto xdr_error;
4231 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4232 if (status != 0)
4233 goto xdr_error;
4234
4235 status = verify_attr_len(xdr, savep, attrlen);
4236 xdr_error:
4237 dprintk("%s: xdr returned %d!\n", __func__, -status);
4238 return status;
4239 }
4240
4241 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4242 {
4243 __be32 *p;
4244 uint32_t len;
4245 int status;
4246
4247 /* Zero handle first to allow comparisons */
4248 memset(fh, 0, sizeof(*fh));
4249
4250 status = decode_op_hdr(xdr, OP_GETFH);
4251 if (status)
4252 return status;
4253
4254 p = xdr_inline_decode(xdr, 4);
4255 if (unlikely(!p))
4256 goto out_overflow;
4257 len = be32_to_cpup(p);
4258 if (len > NFS4_FHSIZE)
4259 return -EIO;
4260 fh->size = len;
4261 p = xdr_inline_decode(xdr, len);
4262 if (unlikely(!p))
4263 goto out_overflow;
4264 memcpy(fh->data, p, len);
4265 return 0;
4266 out_overflow:
4267 print_overflow_msg(__func__, xdr);
4268 return -EIO;
4269 }
4270
4271 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4272 {
4273 int status;
4274
4275 status = decode_op_hdr(xdr, OP_LINK);
4276 if (status)
4277 return status;
4278 return decode_change_info(xdr, cinfo);
4279 }
4280
4281 /*
4282 * We create the owner, so we know a proper owner.id length is 4.
4283 */
4284 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4285 {
4286 uint64_t offset, length, clientid;
4287 __be32 *p;
4288 uint32_t namelen, type;
4289
4290 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4291 if (unlikely(!p))
4292 goto out_overflow;
4293 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4294 p = xdr_decode_hyper(p, &length);
4295 type = be32_to_cpup(p++); /* 4 byte read */
4296 if (fl != NULL) { /* manipulate file lock */
4297 fl->fl_start = (loff_t)offset;
4298 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4299 if (length == ~(uint64_t)0)
4300 fl->fl_end = OFFSET_MAX;
4301 fl->fl_type = F_WRLCK;
4302 if (type & 1)
4303 fl->fl_type = F_RDLCK;
4304 fl->fl_pid = 0;
4305 }
4306 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4307 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4308 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4309 if (likely(p))
4310 return -NFS4ERR_DENIED;
4311 out_overflow:
4312 print_overflow_msg(__func__, xdr);
4313 return -EIO;
4314 }
4315
4316 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4317 {
4318 int status;
4319
4320 status = decode_op_hdr(xdr, OP_LOCK);
4321 if (status == -EIO)
4322 goto out;
4323 if (status == 0) {
4324 status = decode_stateid(xdr, &res->stateid);
4325 if (unlikely(status))
4326 goto out;
4327 } else if (status == -NFS4ERR_DENIED)
4328 status = decode_lock_denied(xdr, NULL);
4329 if (res->open_seqid != NULL)
4330 nfs_increment_open_seqid(status, res->open_seqid);
4331 nfs_increment_lock_seqid(status, res->lock_seqid);
4332 out:
4333 return status;
4334 }
4335
4336 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4337 {
4338 int status;
4339 status = decode_op_hdr(xdr, OP_LOCKT);
4340 if (status == -NFS4ERR_DENIED)
4341 return decode_lock_denied(xdr, res->denied);
4342 return status;
4343 }
4344
4345 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4346 {
4347 int status;
4348
4349 status = decode_op_hdr(xdr, OP_LOCKU);
4350 if (status != -EIO)
4351 nfs_increment_lock_seqid(status, res->seqid);
4352 if (status == 0)
4353 status = decode_stateid(xdr, &res->stateid);
4354 return status;
4355 }
4356
4357 static int decode_release_lockowner(struct xdr_stream *xdr)
4358 {
4359 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4360 }
4361
4362 static int decode_lookup(struct xdr_stream *xdr)
4363 {
4364 return decode_op_hdr(xdr, OP_LOOKUP);
4365 }
4366
4367 /* This is too sick! */
4368 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4369 {
4370 __be32 *p;
4371 uint32_t limit_type, nblocks, blocksize;
4372
4373 p = xdr_inline_decode(xdr, 12);
4374 if (unlikely(!p))
4375 goto out_overflow;
4376 limit_type = be32_to_cpup(p++);
4377 switch (limit_type) {
4378 case 1:
4379 xdr_decode_hyper(p, maxsize);
4380 break;
4381 case 2:
4382 nblocks = be32_to_cpup(p++);
4383 blocksize = be32_to_cpup(p);
4384 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4385 }
4386 return 0;
4387 out_overflow:
4388 print_overflow_msg(__func__, xdr);
4389 return -EIO;
4390 }
4391
4392 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4393 {
4394 __be32 *p;
4395 uint32_t delegation_type;
4396 int status;
4397
4398 p = xdr_inline_decode(xdr, 4);
4399 if (unlikely(!p))
4400 goto out_overflow;
4401 delegation_type = be32_to_cpup(p);
4402 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4403 res->delegation_type = 0;
4404 return 0;
4405 }
4406 status = decode_stateid(xdr, &res->delegation);
4407 if (unlikely(status))
4408 return status;
4409 p = xdr_inline_decode(xdr, 4);
4410 if (unlikely(!p))
4411 goto out_overflow;
4412 res->do_recall = be32_to_cpup(p);
4413
4414 switch (delegation_type) {
4415 case NFS4_OPEN_DELEGATE_READ:
4416 res->delegation_type = FMODE_READ;
4417 break;
4418 case NFS4_OPEN_DELEGATE_WRITE:
4419 res->delegation_type = FMODE_WRITE|FMODE_READ;
4420 if (decode_space_limit(xdr, &res->maxsize) < 0)
4421 return -EIO;
4422 }
4423 return decode_ace(xdr, NULL, res->server->nfs_client);
4424 out_overflow:
4425 print_overflow_msg(__func__, xdr);
4426 return -EIO;
4427 }
4428
4429 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4430 {
4431 __be32 *p;
4432 uint32_t savewords, bmlen, i;
4433 int status;
4434
4435 status = decode_op_hdr(xdr, OP_OPEN);
4436 if (status != -EIO)
4437 nfs_increment_open_seqid(status, res->seqid);
4438 if (!status)
4439 status = decode_stateid(xdr, &res->stateid);
4440 if (unlikely(status))
4441 return status;
4442
4443 decode_change_info(xdr, &res->cinfo);
4444
4445 p = xdr_inline_decode(xdr, 8);
4446 if (unlikely(!p))
4447 goto out_overflow;
4448 res->rflags = be32_to_cpup(p++);
4449 bmlen = be32_to_cpup(p);
4450 if (bmlen > 10)
4451 goto xdr_error;
4452
4453 p = xdr_inline_decode(xdr, bmlen << 2);
4454 if (unlikely(!p))
4455 goto out_overflow;
4456 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4457 for (i = 0; i < savewords; ++i)
4458 res->attrset[i] = be32_to_cpup(p++);
4459 for (; i < NFS4_BITMAP_SIZE; i++)
4460 res->attrset[i] = 0;
4461
4462 return decode_delegation(xdr, res);
4463 xdr_error:
4464 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4465 return -EIO;
4466 out_overflow:
4467 print_overflow_msg(__func__, xdr);
4468 return -EIO;
4469 }
4470
4471 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4472 {
4473 int status;
4474
4475 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4476 if (status != -EIO)
4477 nfs_increment_open_seqid(status, res->seqid);
4478 if (!status)
4479 status = decode_stateid(xdr, &res->stateid);
4480 return status;
4481 }
4482
4483 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4484 {
4485 int status;
4486
4487 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4488 if (status != -EIO)
4489 nfs_increment_open_seqid(status, res->seqid);
4490 if (!status)
4491 status = decode_stateid(xdr, &res->stateid);
4492 return status;
4493 }
4494
4495 static int decode_putfh(struct xdr_stream *xdr)
4496 {
4497 return decode_op_hdr(xdr, OP_PUTFH);
4498 }
4499
4500 static int decode_putrootfh(struct xdr_stream *xdr)
4501 {
4502 return decode_op_hdr(xdr, OP_PUTROOTFH);
4503 }
4504
4505 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4506 {
4507 struct kvec *iov = req->rq_rcv_buf.head;
4508 __be32 *p;
4509 uint32_t count, eof, recvd, hdrlen;
4510 int status;
4511
4512 status = decode_op_hdr(xdr, OP_READ);
4513 if (status)
4514 return status;
4515 p = xdr_inline_decode(xdr, 8);
4516 if (unlikely(!p))
4517 goto out_overflow;
4518 eof = be32_to_cpup(p++);
4519 count = be32_to_cpup(p);
4520 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4521 recvd = req->rq_rcv_buf.len - hdrlen;
4522 if (count > recvd) {
4523 dprintk("NFS: server cheating in read reply: "
4524 "count %u > recvd %u\n", count, recvd);
4525 count = recvd;
4526 eof = 0;
4527 }
4528 xdr_read_pages(xdr, count);
4529 res->eof = eof;
4530 res->count = count;
4531 return 0;
4532 out_overflow:
4533 print_overflow_msg(__func__, xdr);
4534 return -EIO;
4535 }
4536
4537 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4538 {
4539 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4540 struct kvec *iov = rcvbuf->head;
4541 size_t hdrlen;
4542 u32 recvd, pglen = rcvbuf->page_len;
4543 int status;
4544
4545 status = decode_op_hdr(xdr, OP_READDIR);
4546 if (!status)
4547 status = decode_verifier(xdr, readdir->verifier.data);
4548 if (unlikely(status))
4549 return status;
4550 dprintk("%s: verifier = %08x:%08x\n",
4551 __func__,
4552 ((u32 *)readdir->verifier.data)[0],
4553 ((u32 *)readdir->verifier.data)[1]);
4554
4555
4556 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4557 recvd = rcvbuf->len - hdrlen;
4558 if (pglen > recvd)
4559 pglen = recvd;
4560 xdr_read_pages(xdr, pglen);
4561
4562
4563 return pglen;
4564 }
4565
4566 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4567 {
4568 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4569 struct kvec *iov = rcvbuf->head;
4570 size_t hdrlen;
4571 u32 len, recvd;
4572 __be32 *p;
4573 int status;
4574
4575 status = decode_op_hdr(xdr, OP_READLINK);
4576 if (status)
4577 return status;
4578
4579 /* Convert length of symlink */
4580 p = xdr_inline_decode(xdr, 4);
4581 if (unlikely(!p))
4582 goto out_overflow;
4583 len = be32_to_cpup(p);
4584 if (len >= rcvbuf->page_len || len <= 0) {
4585 dprintk("nfs: server returned giant symlink!\n");
4586 return -ENAMETOOLONG;
4587 }
4588 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4589 recvd = req->rq_rcv_buf.len - hdrlen;
4590 if (recvd < len) {
4591 dprintk("NFS: server cheating in readlink reply: "
4592 "count %u > recvd %u\n", len, recvd);
4593 return -EIO;
4594 }
4595 xdr_read_pages(xdr, len);
4596 /*
4597 * The XDR encode routine has set things up so that
4598 * the link text will be copied directly into the
4599 * buffer. We just have to do overflow-checking,
4600 * and and null-terminate the text (the VFS expects
4601 * null-termination).
4602 */
4603 xdr_terminate_string(rcvbuf, len);
4604 return 0;
4605 out_overflow:
4606 print_overflow_msg(__func__, xdr);
4607 return -EIO;
4608 }
4609
4610 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4611 {
4612 int status;
4613
4614 status = decode_op_hdr(xdr, OP_REMOVE);
4615 if (status)
4616 goto out;
4617 status = decode_change_info(xdr, cinfo);
4618 out:
4619 return status;
4620 }
4621
4622 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4623 struct nfs4_change_info *new_cinfo)
4624 {
4625 int status;
4626
4627 status = decode_op_hdr(xdr, OP_RENAME);
4628 if (status)
4629 goto out;
4630 if ((status = decode_change_info(xdr, old_cinfo)))
4631 goto out;
4632 status = decode_change_info(xdr, new_cinfo);
4633 out:
4634 return status;
4635 }
4636
4637 static int decode_renew(struct xdr_stream *xdr)
4638 {
4639 return decode_op_hdr(xdr, OP_RENEW);
4640 }
4641
4642 static int
4643 decode_restorefh(struct xdr_stream *xdr)
4644 {
4645 return decode_op_hdr(xdr, OP_RESTOREFH);
4646 }
4647
4648 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4649 size_t *acl_len)
4650 {
4651 __be32 *savep;
4652 uint32_t attrlen,
4653 bitmap[2] = {0};
4654 struct kvec *iov = req->rq_rcv_buf.head;
4655 int status;
4656
4657 *acl_len = 0;
4658 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4659 goto out;
4660 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4661 goto out;
4662 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4663 goto out;
4664
4665 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4666 return -EIO;
4667 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4668 size_t hdrlen;
4669 u32 recvd;
4670
4671 /* We ignore &savep and don't do consistency checks on
4672 * the attr length. Let userspace figure it out.... */
4673 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4674 recvd = req->rq_rcv_buf.len - hdrlen;
4675 if (attrlen > recvd) {
4676 dprintk("NFS: server cheating in getattr"
4677 " acl reply: attrlen %u > recvd %u\n",
4678 attrlen, recvd);
4679 return -EINVAL;
4680 }
4681 xdr_read_pages(xdr, attrlen);
4682 *acl_len = attrlen;
4683 } else
4684 status = -EOPNOTSUPP;
4685
4686 out:
4687 return status;
4688 }
4689
4690 static int
4691 decode_savefh(struct xdr_stream *xdr)
4692 {
4693 return decode_op_hdr(xdr, OP_SAVEFH);
4694 }
4695
4696 static int decode_setattr(struct xdr_stream *xdr)
4697 {
4698 __be32 *p;
4699 uint32_t bmlen;
4700 int status;
4701
4702 status = decode_op_hdr(xdr, OP_SETATTR);
4703 if (status)
4704 return status;
4705 p = xdr_inline_decode(xdr, 4);
4706 if (unlikely(!p))
4707 goto out_overflow;
4708 bmlen = be32_to_cpup(p);
4709 p = xdr_inline_decode(xdr, bmlen << 2);
4710 if (likely(p))
4711 return 0;
4712 out_overflow:
4713 print_overflow_msg(__func__, xdr);
4714 return -EIO;
4715 }
4716
4717 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4718 {
4719 __be32 *p;
4720 uint32_t opnum;
4721 int32_t nfserr;
4722
4723 p = xdr_inline_decode(xdr, 8);
4724 if (unlikely(!p))
4725 goto out_overflow;
4726 opnum = be32_to_cpup(p++);
4727 if (opnum != OP_SETCLIENTID) {
4728 dprintk("nfs: decode_setclientid: Server returned operation"
4729 " %d\n", opnum);
4730 return -EIO;
4731 }
4732 nfserr = be32_to_cpup(p);
4733 if (nfserr == NFS_OK) {
4734 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4735 if (unlikely(!p))
4736 goto out_overflow;
4737 p = xdr_decode_hyper(p, &res->clientid);
4738 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4739 } else if (nfserr == NFSERR_CLID_INUSE) {
4740 uint32_t len;
4741
4742 /* skip netid string */
4743 p = xdr_inline_decode(xdr, 4);
4744 if (unlikely(!p))
4745 goto out_overflow;
4746 len = be32_to_cpup(p);
4747 p = xdr_inline_decode(xdr, len);
4748 if (unlikely(!p))
4749 goto out_overflow;
4750
4751 /* skip uaddr string */
4752 p = xdr_inline_decode(xdr, 4);
4753 if (unlikely(!p))
4754 goto out_overflow;
4755 len = be32_to_cpup(p);
4756 p = xdr_inline_decode(xdr, len);
4757 if (unlikely(!p))
4758 goto out_overflow;
4759 return -NFSERR_CLID_INUSE;
4760 } else
4761 return nfs4_stat_to_errno(nfserr);
4762
4763 return 0;
4764 out_overflow:
4765 print_overflow_msg(__func__, xdr);
4766 return -EIO;
4767 }
4768
4769 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4770 {
4771 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4772 }
4773
4774 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4775 {
4776 __be32 *p;
4777 int status;
4778
4779 status = decode_op_hdr(xdr, OP_WRITE);
4780 if (status)
4781 return status;
4782
4783 p = xdr_inline_decode(xdr, 16);
4784 if (unlikely(!p))
4785 goto out_overflow;
4786 res->count = be32_to_cpup(p++);
4787 res->verf->committed = be32_to_cpup(p++);
4788 memcpy(res->verf->verifier, p, 8);
4789 return 0;
4790 out_overflow:
4791 print_overflow_msg(__func__, xdr);
4792 return -EIO;
4793 }
4794
4795 static int decode_delegreturn(struct xdr_stream *xdr)
4796 {
4797 return decode_op_hdr(xdr, OP_DELEGRETURN);
4798 }
4799
4800 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
4801 {
4802 __be32 *p;
4803
4804 p = xdr_inline_decode(xdr, 4);
4805 if (unlikely(!p))
4806 goto out_overflow;
4807 flavor->gss.sec_oid4.len = be32_to_cpup(p);
4808 if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
4809 goto out_err;
4810
4811 p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
4812 if (unlikely(!p))
4813 goto out_overflow;
4814 memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
4815
4816 p = xdr_inline_decode(xdr, 8);
4817 if (unlikely(!p))
4818 goto out_overflow;
4819 flavor->gss.qop4 = be32_to_cpup(p++);
4820 flavor->gss.service = be32_to_cpup(p);
4821
4822 return 0;
4823
4824 out_overflow:
4825 print_overflow_msg(__func__, xdr);
4826 return -EIO;
4827 out_err:
4828 return -EINVAL;
4829 }
4830
4831 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
4832 {
4833 struct nfs4_secinfo_flavor *sec_flavor;
4834 int status;
4835 __be32 *p;
4836 int i, num_flavors;
4837
4838 status = decode_op_hdr(xdr, OP_SECINFO);
4839 if (status)
4840 goto out;
4841 p = xdr_inline_decode(xdr, 4);
4842 if (unlikely(!p))
4843 goto out_overflow;
4844
4845 res->flavors->num_flavors = 0;
4846 num_flavors = be32_to_cpup(p);
4847
4848 for (i = 0; i < num_flavors; i++) {
4849 sec_flavor = &res->flavors->flavors[i];
4850 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
4851 break;
4852
4853 p = xdr_inline_decode(xdr, 4);
4854 if (unlikely(!p))
4855 goto out_overflow;
4856 sec_flavor->flavor = be32_to_cpup(p);
4857
4858 if (sec_flavor->flavor == RPC_AUTH_GSS) {
4859 status = decode_secinfo_gss(xdr, sec_flavor);
4860 if (status)
4861 goto out;
4862 }
4863 res->flavors->num_flavors++;
4864 }
4865
4866 out:
4867 return status;
4868 out_overflow:
4869 print_overflow_msg(__func__, xdr);
4870 return -EIO;
4871 }
4872
4873 #if defined(CONFIG_NFS_V4_1)
4874 static int decode_exchange_id(struct xdr_stream *xdr,
4875 struct nfs41_exchange_id_res *res)
4876 {
4877 __be32 *p;
4878 uint32_t dummy;
4879 char *dummy_str;
4880 int status;
4881 struct nfs_client *clp = res->client;
4882
4883 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4884 if (status)
4885 return status;
4886
4887 p = xdr_inline_decode(xdr, 8);
4888 if (unlikely(!p))
4889 goto out_overflow;
4890 xdr_decode_hyper(p, &clp->cl_clientid);
4891 p = xdr_inline_decode(xdr, 12);
4892 if (unlikely(!p))
4893 goto out_overflow;
4894 clp->cl_seqid = be32_to_cpup(p++);
4895 clp->cl_exchange_flags = be32_to_cpup(p++);
4896
4897 /* We ask for SP4_NONE */
4898 dummy = be32_to_cpup(p);
4899 if (dummy != SP4_NONE)
4900 return -EIO;
4901
4902 /* Throw away minor_id */
4903 p = xdr_inline_decode(xdr, 8);
4904 if (unlikely(!p))
4905 goto out_overflow;
4906
4907 /* Throw away Major id */
4908 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4909 if (unlikely(status))
4910 return status;
4911
4912 /* Throw away server_scope */
4913 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4914 if (unlikely(status))
4915 return status;
4916
4917 /* Throw away Implementation id array */
4918 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4919 if (unlikely(status))
4920 return status;
4921
4922 return 0;
4923 out_overflow:
4924 print_overflow_msg(__func__, xdr);
4925 return -EIO;
4926 }
4927
4928 static int decode_chan_attrs(struct xdr_stream *xdr,
4929 struct nfs4_channel_attrs *attrs)
4930 {
4931 __be32 *p;
4932 u32 nr_attrs;
4933
4934 p = xdr_inline_decode(xdr, 28);
4935 if (unlikely(!p))
4936 goto out_overflow;
4937 attrs->headerpadsz = be32_to_cpup(p++);
4938 attrs->max_rqst_sz = be32_to_cpup(p++);
4939 attrs->max_resp_sz = be32_to_cpup(p++);
4940 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4941 attrs->max_ops = be32_to_cpup(p++);
4942 attrs->max_reqs = be32_to_cpup(p++);
4943 nr_attrs = be32_to_cpup(p);
4944 if (unlikely(nr_attrs > 1)) {
4945 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4946 __func__, nr_attrs);
4947 return -EINVAL;
4948 }
4949 if (nr_attrs == 1) {
4950 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4951 if (unlikely(!p))
4952 goto out_overflow;
4953 }
4954 return 0;
4955 out_overflow:
4956 print_overflow_msg(__func__, xdr);
4957 return -EIO;
4958 }
4959
4960 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4961 {
4962 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4963 }
4964
4965 static int decode_create_session(struct xdr_stream *xdr,
4966 struct nfs41_create_session_res *res)
4967 {
4968 __be32 *p;
4969 int status;
4970 struct nfs_client *clp = res->client;
4971 struct nfs4_session *session = clp->cl_session;
4972
4973 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4974 if (!status)
4975 status = decode_sessionid(xdr, &session->sess_id);
4976 if (unlikely(status))
4977 return status;
4978
4979 /* seqid, flags */
4980 p = xdr_inline_decode(xdr, 8);
4981 if (unlikely(!p))
4982 goto out_overflow;
4983 clp->cl_seqid = be32_to_cpup(p++);
4984 session->flags = be32_to_cpup(p);
4985
4986 /* Channel attributes */
4987 status = decode_chan_attrs(xdr, &session->fc_attrs);
4988 if (!status)
4989 status = decode_chan_attrs(xdr, &session->bc_attrs);
4990 return status;
4991 out_overflow:
4992 print_overflow_msg(__func__, xdr);
4993 return -EIO;
4994 }
4995
4996 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4997 {
4998 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4999 }
5000
5001 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5002 {
5003 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5004 }
5005 #endif /* CONFIG_NFS_V4_1 */
5006
5007 static int decode_sequence(struct xdr_stream *xdr,
5008 struct nfs4_sequence_res *res,
5009 struct rpc_rqst *rqstp)
5010 {
5011 #if defined(CONFIG_NFS_V4_1)
5012 struct nfs4_sessionid id;
5013 u32 dummy;
5014 int status;
5015 __be32 *p;
5016
5017 if (!res->sr_session)
5018 return 0;
5019
5020 status = decode_op_hdr(xdr, OP_SEQUENCE);
5021 if (!status)
5022 status = decode_sessionid(xdr, &id);
5023 if (unlikely(status))
5024 goto out_err;
5025
5026 /*
5027 * If the server returns different values for sessionID, slotID or
5028 * sequence number, the server is looney tunes.
5029 */
5030 status = -EREMOTEIO;
5031
5032 if (memcmp(id.data, res->sr_session->sess_id.data,
5033 NFS4_MAX_SESSIONID_LEN)) {
5034 dprintk("%s Invalid session id\n", __func__);
5035 goto out_err;
5036 }
5037
5038 p = xdr_inline_decode(xdr, 20);
5039 if (unlikely(!p))
5040 goto out_overflow;
5041
5042 /* seqid */
5043 dummy = be32_to_cpup(p++);
5044 if (dummy != res->sr_slot->seq_nr) {
5045 dprintk("%s Invalid sequence number\n", __func__);
5046 goto out_err;
5047 }
5048 /* slot id */
5049 dummy = be32_to_cpup(p++);
5050 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5051 dprintk("%s Invalid slot id\n", __func__);
5052 goto out_err;
5053 }
5054 /* highest slot id - currently not processed */
5055 dummy = be32_to_cpup(p++);
5056 /* target highest slot id - currently not processed */
5057 dummy = be32_to_cpup(p++);
5058 /* result flags */
5059 res->sr_status_flags = be32_to_cpup(p);
5060 status = 0;
5061 out_err:
5062 res->sr_status = status;
5063 return status;
5064 out_overflow:
5065 print_overflow_msg(__func__, xdr);
5066 status = -EIO;
5067 goto out_err;
5068 #else /* CONFIG_NFS_V4_1 */
5069 return 0;
5070 #endif /* CONFIG_NFS_V4_1 */
5071 }
5072
5073 #if defined(CONFIG_NFS_V4_1)
5074
5075 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5076 struct pnfs_device *pdev)
5077 {
5078 __be32 *p;
5079 uint32_t len, type;
5080 int status;
5081
5082 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5083 if (status) {
5084 if (status == -ETOOSMALL) {
5085 p = xdr_inline_decode(xdr, 4);
5086 if (unlikely(!p))
5087 goto out_overflow;
5088 pdev->mincount = be32_to_cpup(p);
5089 dprintk("%s: Min count too small. mincnt = %u\n",
5090 __func__, pdev->mincount);
5091 }
5092 return status;
5093 }
5094
5095 p = xdr_inline_decode(xdr, 8);
5096 if (unlikely(!p))
5097 goto out_overflow;
5098 type = be32_to_cpup(p++);
5099 if (type != pdev->layout_type) {
5100 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5101 __func__, pdev->layout_type, type);
5102 return -EINVAL;
5103 }
5104 /*
5105 * Get the length of the opaque device_addr4. xdr_read_pages places
5106 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5107 * and places the remaining xdr data in xdr_buf->tail
5108 */
5109 pdev->mincount = be32_to_cpup(p);
5110 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5111
5112 /* Parse notification bitmap, verifying that it is zero. */
5113 p = xdr_inline_decode(xdr, 4);
5114 if (unlikely(!p))
5115 goto out_overflow;
5116 len = be32_to_cpup(p);
5117 if (len) {
5118 uint32_t i;
5119
5120 p = xdr_inline_decode(xdr, 4 * len);
5121 if (unlikely(!p))
5122 goto out_overflow;
5123 for (i = 0; i < len; i++, p++) {
5124 if (be32_to_cpup(p)) {
5125 dprintk("%s: notifications not supported\n",
5126 __func__);
5127 return -EIO;
5128 }
5129 }
5130 }
5131 return 0;
5132 out_overflow:
5133 print_overflow_msg(__func__, xdr);
5134 return -EIO;
5135 }
5136
5137 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5138 struct nfs4_layoutget_res *res)
5139 {
5140 __be32 *p;
5141 int status;
5142 u32 layout_count;
5143 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5144 struct kvec *iov = rcvbuf->head;
5145 u32 hdrlen, recvd;
5146
5147 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5148 if (status)
5149 return status;
5150 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5151 if (unlikely(!p))
5152 goto out_overflow;
5153 res->return_on_close = be32_to_cpup(p++);
5154 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5155 layout_count = be32_to_cpup(p);
5156 if (!layout_count) {
5157 dprintk("%s: server responded with empty layout array\n",
5158 __func__);
5159 return -EINVAL;
5160 }
5161
5162 p = xdr_inline_decode(xdr, 28);
5163 if (unlikely(!p))
5164 goto out_overflow;
5165 p = xdr_decode_hyper(p, &res->range.offset);
5166 p = xdr_decode_hyper(p, &res->range.length);
5167 res->range.iomode = be32_to_cpup(p++);
5168 res->type = be32_to_cpup(p++);
5169 res->layoutp->len = be32_to_cpup(p);
5170
5171 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5172 __func__,
5173 (unsigned long)res->range.offset,
5174 (unsigned long)res->range.length,
5175 res->range.iomode,
5176 res->type,
5177 res->layoutp->len);
5178
5179 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5180 recvd = req->rq_rcv_buf.len - hdrlen;
5181 if (res->layoutp->len > recvd) {
5182 dprintk("NFS: server cheating in layoutget reply: "
5183 "layout len %u > recvd %u\n",
5184 res->layoutp->len, recvd);
5185 return -EINVAL;
5186 }
5187
5188 xdr_read_pages(xdr, res->layoutp->len);
5189
5190 if (layout_count > 1) {
5191 /* We only handle a length one array at the moment. Any
5192 * further entries are just ignored. Note that this means
5193 * the client may see a response that is less than the
5194 * minimum it requested.
5195 */
5196 dprintk("%s: server responded with %d layouts, dropping tail\n",
5197 __func__, layout_count);
5198 }
5199
5200 return 0;
5201 out_overflow:
5202 print_overflow_msg(__func__, xdr);
5203 return -EIO;
5204 }
5205
5206 static int decode_layoutcommit(struct xdr_stream *xdr,
5207 struct rpc_rqst *req,
5208 struct nfs4_layoutcommit_res *res)
5209 {
5210 __be32 *p;
5211 __u32 sizechanged;
5212 int status;
5213
5214 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5215 if (status)
5216 return status;
5217
5218 p = xdr_inline_decode(xdr, 4);
5219 if (unlikely(!p))
5220 goto out_overflow;
5221 sizechanged = be32_to_cpup(p);
5222
5223 if (sizechanged) {
5224 /* throw away new size */
5225 p = xdr_inline_decode(xdr, 8);
5226 if (unlikely(!p))
5227 goto out_overflow;
5228 }
5229 return 0;
5230 out_overflow:
5231 print_overflow_msg(__func__, xdr);
5232 return -EIO;
5233 }
5234 #endif /* CONFIG_NFS_V4_1 */
5235
5236 /*
5237 * END OF "GENERIC" DECODE ROUTINES.
5238 */
5239
5240 /*
5241 * Decode OPEN_DOWNGRADE response
5242 */
5243 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5244 struct xdr_stream *xdr,
5245 struct nfs_closeres *res)
5246 {
5247 struct compound_hdr hdr;
5248 int status;
5249
5250 status = decode_compound_hdr(xdr, &hdr);
5251 if (status)
5252 goto out;
5253 status = decode_sequence(xdr, &res->seq_res, rqstp);
5254 if (status)
5255 goto out;
5256 status = decode_putfh(xdr);
5257 if (status)
5258 goto out;
5259 status = decode_open_downgrade(xdr, res);
5260 if (status != 0)
5261 goto out;
5262 decode_getfattr(xdr, res->fattr, res->server,
5263 !RPC_IS_ASYNC(rqstp->rq_task));
5264 out:
5265 return status;
5266 }
5267
5268 /*
5269 * Decode ACCESS response
5270 */
5271 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5272 struct nfs4_accessres *res)
5273 {
5274 struct compound_hdr hdr;
5275 int status;
5276
5277 status = decode_compound_hdr(xdr, &hdr);
5278 if (status)
5279 goto out;
5280 status = decode_sequence(xdr, &res->seq_res, rqstp);
5281 if (status)
5282 goto out;
5283 status = decode_putfh(xdr);
5284 if (status != 0)
5285 goto out;
5286 status = decode_access(xdr, res);
5287 if (status != 0)
5288 goto out;
5289 decode_getfattr(xdr, res->fattr, res->server,
5290 !RPC_IS_ASYNC(rqstp->rq_task));
5291 out:
5292 return status;
5293 }
5294
5295 /*
5296 * Decode LOOKUP response
5297 */
5298 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5299 struct nfs4_lookup_res *res)
5300 {
5301 struct compound_hdr hdr;
5302 int status;
5303
5304 status = decode_compound_hdr(xdr, &hdr);
5305 if (status)
5306 goto out;
5307 status = decode_sequence(xdr, &res->seq_res, rqstp);
5308 if (status)
5309 goto out;
5310 status = decode_putfh(xdr);
5311 if (status)
5312 goto out;
5313 status = decode_lookup(xdr);
5314 if (status)
5315 goto out;
5316 status = decode_getfh(xdr, res->fh);
5317 if (status)
5318 goto out;
5319 status = decode_getfattr(xdr, res->fattr, res->server
5320 ,!RPC_IS_ASYNC(rqstp->rq_task));
5321 out:
5322 return status;
5323 }
5324
5325 /*
5326 * Decode LOOKUP_ROOT response
5327 */
5328 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5329 struct xdr_stream *xdr,
5330 struct nfs4_lookup_res *res)
5331 {
5332 struct compound_hdr hdr;
5333 int status;
5334
5335 status = decode_compound_hdr(xdr, &hdr);
5336 if (status)
5337 goto out;
5338 status = decode_sequence(xdr, &res->seq_res, rqstp);
5339 if (status)
5340 goto out;
5341 status = decode_putrootfh(xdr);
5342 if (status)
5343 goto out;
5344 status = decode_getfh(xdr, res->fh);
5345 if (status == 0)
5346 status = decode_getfattr(xdr, res->fattr, res->server,
5347 !RPC_IS_ASYNC(rqstp->rq_task));
5348 out:
5349 return status;
5350 }
5351
5352 /*
5353 * Decode REMOVE response
5354 */
5355 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5356 struct nfs_removeres *res)
5357 {
5358 struct compound_hdr hdr;
5359 int status;
5360
5361 status = decode_compound_hdr(xdr, &hdr);
5362 if (status)
5363 goto out;
5364 status = decode_sequence(xdr, &res->seq_res, rqstp);
5365 if (status)
5366 goto out;
5367 status = decode_putfh(xdr);
5368 if (status)
5369 goto out;
5370 status = decode_remove(xdr, &res->cinfo);
5371 if (status)
5372 goto out;
5373 decode_getfattr(xdr, res->dir_attr, res->server,
5374 !RPC_IS_ASYNC(rqstp->rq_task));
5375 out:
5376 return status;
5377 }
5378
5379 /*
5380 * Decode RENAME response
5381 */
5382 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5383 struct nfs_renameres *res)
5384 {
5385 struct compound_hdr hdr;
5386 int status;
5387
5388 status = decode_compound_hdr(xdr, &hdr);
5389 if (status)
5390 goto out;
5391 status = decode_sequence(xdr, &res->seq_res, rqstp);
5392 if (status)
5393 goto out;
5394 status = decode_putfh(xdr);
5395 if (status)
5396 goto out;
5397 status = decode_savefh(xdr);
5398 if (status)
5399 goto out;
5400 status = decode_putfh(xdr);
5401 if (status)
5402 goto out;
5403 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5404 if (status)
5405 goto out;
5406 /* Current FH is target directory */
5407 if (decode_getfattr(xdr, res->new_fattr, res->server,
5408 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5409 goto out;
5410 status = decode_restorefh(xdr);
5411 if (status)
5412 goto out;
5413 decode_getfattr(xdr, res->old_fattr, res->server,
5414 !RPC_IS_ASYNC(rqstp->rq_task));
5415 out:
5416 return status;
5417 }
5418
5419 /*
5420 * Decode LINK response
5421 */
5422 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5423 struct nfs4_link_res *res)
5424 {
5425 struct compound_hdr hdr;
5426 int status;
5427
5428 status = decode_compound_hdr(xdr, &hdr);
5429 if (status)
5430 goto out;
5431 status = decode_sequence(xdr, &res->seq_res, rqstp);
5432 if (status)
5433 goto out;
5434 status = decode_putfh(xdr);
5435 if (status)
5436 goto out;
5437 status = decode_savefh(xdr);
5438 if (status)
5439 goto out;
5440 status = decode_putfh(xdr);
5441 if (status)
5442 goto out;
5443 status = decode_link(xdr, &res->cinfo);
5444 if (status)
5445 goto out;
5446 /*
5447 * Note order: OP_LINK leaves the directory as the current
5448 * filehandle.
5449 */
5450 if (decode_getfattr(xdr, res->dir_attr, res->server,
5451 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5452 goto out;
5453 status = decode_restorefh(xdr);
5454 if (status)
5455 goto out;
5456 decode_getfattr(xdr, res->fattr, res->server,
5457 !RPC_IS_ASYNC(rqstp->rq_task));
5458 out:
5459 return status;
5460 }
5461
5462 /*
5463 * Decode CREATE response
5464 */
5465 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5466 struct nfs4_create_res *res)
5467 {
5468 struct compound_hdr hdr;
5469 int status;
5470
5471 status = decode_compound_hdr(xdr, &hdr);
5472 if (status)
5473 goto out;
5474 status = decode_sequence(xdr, &res->seq_res, rqstp);
5475 if (status)
5476 goto out;
5477 status = decode_putfh(xdr);
5478 if (status)
5479 goto out;
5480 status = decode_savefh(xdr);
5481 if (status)
5482 goto out;
5483 status = decode_create(xdr, &res->dir_cinfo);
5484 if (status)
5485 goto out;
5486 status = decode_getfh(xdr, res->fh);
5487 if (status)
5488 goto out;
5489 if (decode_getfattr(xdr, res->fattr, res->server,
5490 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5491 goto out;
5492 status = decode_restorefh(xdr);
5493 if (status)
5494 goto out;
5495 decode_getfattr(xdr, res->dir_fattr, res->server,
5496 !RPC_IS_ASYNC(rqstp->rq_task));
5497 out:
5498 return status;
5499 }
5500
5501 /*
5502 * Decode SYMLINK response
5503 */
5504 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5505 struct nfs4_create_res *res)
5506 {
5507 return nfs4_xdr_dec_create(rqstp, xdr, res);
5508 }
5509
5510 /*
5511 * Decode GETATTR response
5512 */
5513 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5514 struct nfs4_getattr_res *res)
5515 {
5516 struct compound_hdr hdr;
5517 int status;
5518
5519 status = decode_compound_hdr(xdr, &hdr);
5520 if (status)
5521 goto out;
5522 status = decode_sequence(xdr, &res->seq_res, rqstp);
5523 if (status)
5524 goto out;
5525 status = decode_putfh(xdr);
5526 if (status)
5527 goto out;
5528 status = decode_getfattr(xdr, res->fattr, res->server,
5529 !RPC_IS_ASYNC(rqstp->rq_task));
5530 out:
5531 return status;
5532 }
5533
5534 /*
5535 * Encode an SETACL request
5536 */
5537 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5538 struct nfs_setaclargs *args)
5539 {
5540 struct compound_hdr hdr = {
5541 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5542 };
5543
5544 encode_compound_hdr(xdr, req, &hdr);
5545 encode_sequence(xdr, &args->seq_args, &hdr);
5546 encode_putfh(xdr, args->fh, &hdr);
5547 encode_setacl(xdr, args, &hdr);
5548 encode_nops(&hdr);
5549 }
5550
5551 /*
5552 * Decode SETACL response
5553 */
5554 static int
5555 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5556 struct nfs_setaclres *res)
5557 {
5558 struct compound_hdr hdr;
5559 int status;
5560
5561 status = decode_compound_hdr(xdr, &hdr);
5562 if (status)
5563 goto out;
5564 status = decode_sequence(xdr, &res->seq_res, rqstp);
5565 if (status)
5566 goto out;
5567 status = decode_putfh(xdr);
5568 if (status)
5569 goto out;
5570 status = decode_setattr(xdr);
5571 out:
5572 return status;
5573 }
5574
5575 /*
5576 * Decode GETACL response
5577 */
5578 static int
5579 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5580 struct nfs_getaclres *res)
5581 {
5582 struct compound_hdr hdr;
5583 int status;
5584
5585 status = decode_compound_hdr(xdr, &hdr);
5586 if (status)
5587 goto out;
5588 status = decode_sequence(xdr, &res->seq_res, rqstp);
5589 if (status)
5590 goto out;
5591 status = decode_putfh(xdr);
5592 if (status)
5593 goto out;
5594 status = decode_getacl(xdr, rqstp, &res->acl_len);
5595
5596 out:
5597 return status;
5598 }
5599
5600 /*
5601 * Decode CLOSE response
5602 */
5603 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5604 struct nfs_closeres *res)
5605 {
5606 struct compound_hdr hdr;
5607 int status;
5608
5609 status = decode_compound_hdr(xdr, &hdr);
5610 if (status)
5611 goto out;
5612 status = decode_sequence(xdr, &res->seq_res, rqstp);
5613 if (status)
5614 goto out;
5615 status = decode_putfh(xdr);
5616 if (status)
5617 goto out;
5618 status = decode_close(xdr, res);
5619 if (status != 0)
5620 goto out;
5621 /*
5622 * Note: Server may do delete on close for this file
5623 * in which case the getattr call will fail with
5624 * an ESTALE error. Shouldn't be a problem,
5625 * though, since fattr->valid will remain unset.
5626 */
5627 decode_getfattr(xdr, res->fattr, res->server,
5628 !RPC_IS_ASYNC(rqstp->rq_task));
5629 out:
5630 return status;
5631 }
5632
5633 /*
5634 * Decode OPEN response
5635 */
5636 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5637 struct nfs_openres *res)
5638 {
5639 struct compound_hdr hdr;
5640 int status;
5641
5642 status = decode_compound_hdr(xdr, &hdr);
5643 if (status)
5644 goto out;
5645 status = decode_sequence(xdr, &res->seq_res, rqstp);
5646 if (status)
5647 goto out;
5648 status = decode_putfh(xdr);
5649 if (status)
5650 goto out;
5651 status = decode_savefh(xdr);
5652 if (status)
5653 goto out;
5654 status = decode_open(xdr, res);
5655 if (status)
5656 goto out;
5657 if (decode_getfh(xdr, &res->fh) != 0)
5658 goto out;
5659 if (decode_getfattr(xdr, res->f_attr, res->server,
5660 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5661 goto out;
5662 if (decode_restorefh(xdr) != 0)
5663 goto out;
5664 decode_getfattr(xdr, res->dir_attr, res->server,
5665 !RPC_IS_ASYNC(rqstp->rq_task));
5666 out:
5667 return status;
5668 }
5669
5670 /*
5671 * Decode OPEN_CONFIRM response
5672 */
5673 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5674 struct xdr_stream *xdr,
5675 struct nfs_open_confirmres *res)
5676 {
5677 struct compound_hdr hdr;
5678 int status;
5679
5680 status = decode_compound_hdr(xdr, &hdr);
5681 if (status)
5682 goto out;
5683 status = decode_putfh(xdr);
5684 if (status)
5685 goto out;
5686 status = decode_open_confirm(xdr, res);
5687 out:
5688 return status;
5689 }
5690
5691 /*
5692 * Decode OPEN response
5693 */
5694 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5695 struct xdr_stream *xdr,
5696 struct nfs_openres *res)
5697 {
5698 struct compound_hdr hdr;
5699 int status;
5700
5701 status = decode_compound_hdr(xdr, &hdr);
5702 if (status)
5703 goto out;
5704 status = decode_sequence(xdr, &res->seq_res, rqstp);
5705 if (status)
5706 goto out;
5707 status = decode_putfh(xdr);
5708 if (status)
5709 goto out;
5710 status = decode_open(xdr, res);
5711 if (status)
5712 goto out;
5713 decode_getfattr(xdr, res->f_attr, res->server,
5714 !RPC_IS_ASYNC(rqstp->rq_task));
5715 out:
5716 return status;
5717 }
5718
5719 /*
5720 * Decode SETATTR response
5721 */
5722 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5723 struct xdr_stream *xdr,
5724 struct nfs_setattrres *res)
5725 {
5726 struct compound_hdr hdr;
5727 int status;
5728
5729 status = decode_compound_hdr(xdr, &hdr);
5730 if (status)
5731 goto out;
5732 status = decode_sequence(xdr, &res->seq_res, rqstp);
5733 if (status)
5734 goto out;
5735 status = decode_putfh(xdr);
5736 if (status)
5737 goto out;
5738 status = decode_setattr(xdr);
5739 if (status)
5740 goto out;
5741 decode_getfattr(xdr, res->fattr, res->server,
5742 !RPC_IS_ASYNC(rqstp->rq_task));
5743 out:
5744 return status;
5745 }
5746
5747 /*
5748 * Decode LOCK response
5749 */
5750 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5751 struct nfs_lock_res *res)
5752 {
5753 struct compound_hdr hdr;
5754 int status;
5755
5756 status = decode_compound_hdr(xdr, &hdr);
5757 if (status)
5758 goto out;
5759 status = decode_sequence(xdr, &res->seq_res, rqstp);
5760 if (status)
5761 goto out;
5762 status = decode_putfh(xdr);
5763 if (status)
5764 goto out;
5765 status = decode_lock(xdr, res);
5766 out:
5767 return status;
5768 }
5769
5770 /*
5771 * Decode LOCKT response
5772 */
5773 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5774 struct nfs_lockt_res *res)
5775 {
5776 struct compound_hdr hdr;
5777 int status;
5778
5779 status = decode_compound_hdr(xdr, &hdr);
5780 if (status)
5781 goto out;
5782 status = decode_sequence(xdr, &res->seq_res, rqstp);
5783 if (status)
5784 goto out;
5785 status = decode_putfh(xdr);
5786 if (status)
5787 goto out;
5788 status = decode_lockt(xdr, res);
5789 out:
5790 return status;
5791 }
5792
5793 /*
5794 * Decode LOCKU response
5795 */
5796 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5797 struct nfs_locku_res *res)
5798 {
5799 struct compound_hdr hdr;
5800 int status;
5801
5802 status = decode_compound_hdr(xdr, &hdr);
5803 if (status)
5804 goto out;
5805 status = decode_sequence(xdr, &res->seq_res, rqstp);
5806 if (status)
5807 goto out;
5808 status = decode_putfh(xdr);
5809 if (status)
5810 goto out;
5811 status = decode_locku(xdr, res);
5812 out:
5813 return status;
5814 }
5815
5816 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5817 struct xdr_stream *xdr, void *dummy)
5818 {
5819 struct compound_hdr hdr;
5820 int status;
5821
5822 status = decode_compound_hdr(xdr, &hdr);
5823 if (!status)
5824 status = decode_release_lockowner(xdr);
5825 return status;
5826 }
5827
5828 /*
5829 * Decode READLINK response
5830 */
5831 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5832 struct xdr_stream *xdr,
5833 struct nfs4_readlink_res *res)
5834 {
5835 struct compound_hdr hdr;
5836 int status;
5837
5838 status = decode_compound_hdr(xdr, &hdr);
5839 if (status)
5840 goto out;
5841 status = decode_sequence(xdr, &res->seq_res, rqstp);
5842 if (status)
5843 goto out;
5844 status = decode_putfh(xdr);
5845 if (status)
5846 goto out;
5847 status = decode_readlink(xdr, rqstp);
5848 out:
5849 return status;
5850 }
5851
5852 /*
5853 * Decode READDIR response
5854 */
5855 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5856 struct nfs4_readdir_res *res)
5857 {
5858 struct compound_hdr hdr;
5859 int status;
5860
5861 status = decode_compound_hdr(xdr, &hdr);
5862 if (status)
5863 goto out;
5864 status = decode_sequence(xdr, &res->seq_res, rqstp);
5865 if (status)
5866 goto out;
5867 status = decode_putfh(xdr);
5868 if (status)
5869 goto out;
5870 status = decode_readdir(xdr, rqstp, res);
5871 out:
5872 return status;
5873 }
5874
5875 /*
5876 * Decode Read response
5877 */
5878 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5879 struct nfs_readres *res)
5880 {
5881 struct compound_hdr hdr;
5882 int status;
5883
5884 status = decode_compound_hdr(xdr, &hdr);
5885 if (status)
5886 goto out;
5887 status = decode_sequence(xdr, &res->seq_res, rqstp);
5888 if (status)
5889 goto out;
5890 status = decode_putfh(xdr);
5891 if (status)
5892 goto out;
5893 status = decode_read(xdr, rqstp, res);
5894 if (!status)
5895 status = res->count;
5896 out:
5897 return status;
5898 }
5899
5900 /*
5901 * Decode WRITE response
5902 */
5903 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5904 struct nfs_writeres *res)
5905 {
5906 struct compound_hdr hdr;
5907 int status;
5908
5909 status = decode_compound_hdr(xdr, &hdr);
5910 if (status)
5911 goto out;
5912 status = decode_sequence(xdr, &res->seq_res, rqstp);
5913 if (status)
5914 goto out;
5915 status = decode_putfh(xdr);
5916 if (status)
5917 goto out;
5918 status = decode_write(xdr, res);
5919 if (status)
5920 goto out;
5921 if (res->fattr)
5922 decode_getfattr(xdr, res->fattr, res->server,
5923 !RPC_IS_ASYNC(rqstp->rq_task));
5924 if (!status)
5925 status = res->count;
5926 out:
5927 return status;
5928 }
5929
5930 /*
5931 * Decode COMMIT response
5932 */
5933 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5934 struct nfs_writeres *res)
5935 {
5936 struct compound_hdr hdr;
5937 int status;
5938
5939 status = decode_compound_hdr(xdr, &hdr);
5940 if (status)
5941 goto out;
5942 status = decode_sequence(xdr, &res->seq_res, rqstp);
5943 if (status)
5944 goto out;
5945 status = decode_putfh(xdr);
5946 if (status)
5947 goto out;
5948 status = decode_commit(xdr, res);
5949 if (status)
5950 goto out;
5951 if (res->fattr)
5952 decode_getfattr(xdr, res->fattr, res->server,
5953 !RPC_IS_ASYNC(rqstp->rq_task));
5954 out:
5955 return status;
5956 }
5957
5958 /*
5959 * Decode FSINFO response
5960 */
5961 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5962 struct nfs4_fsinfo_res *res)
5963 {
5964 struct compound_hdr hdr;
5965 int status;
5966
5967 status = decode_compound_hdr(xdr, &hdr);
5968 if (!status)
5969 status = decode_sequence(xdr, &res->seq_res, req);
5970 if (!status)
5971 status = decode_putfh(xdr);
5972 if (!status)
5973 status = decode_fsinfo(xdr, res->fsinfo);
5974 return status;
5975 }
5976
5977 /*
5978 * Decode PATHCONF response
5979 */
5980 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5981 struct nfs4_pathconf_res *res)
5982 {
5983 struct compound_hdr hdr;
5984 int status;
5985
5986 status = decode_compound_hdr(xdr, &hdr);
5987 if (!status)
5988 status = decode_sequence(xdr, &res->seq_res, req);
5989 if (!status)
5990 status = decode_putfh(xdr);
5991 if (!status)
5992 status = decode_pathconf(xdr, res->pathconf);
5993 return status;
5994 }
5995
5996 /*
5997 * Decode STATFS response
5998 */
5999 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6000 struct nfs4_statfs_res *res)
6001 {
6002 struct compound_hdr hdr;
6003 int status;
6004
6005 status = decode_compound_hdr(xdr, &hdr);
6006 if (!status)
6007 status = decode_sequence(xdr, &res->seq_res, req);
6008 if (!status)
6009 status = decode_putfh(xdr);
6010 if (!status)
6011 status = decode_statfs(xdr, res->fsstat);
6012 return status;
6013 }
6014
6015 /*
6016 * Decode GETATTR_BITMAP response
6017 */
6018 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6019 struct xdr_stream *xdr,
6020 struct nfs4_server_caps_res *res)
6021 {
6022 struct compound_hdr hdr;
6023 int status;
6024
6025 status = decode_compound_hdr(xdr, &hdr);
6026 if (status)
6027 goto out;
6028 status = decode_sequence(xdr, &res->seq_res, req);
6029 if (status)
6030 goto out;
6031 status = decode_putfh(xdr);
6032 if (status)
6033 goto out;
6034 status = decode_server_caps(xdr, res);
6035 out:
6036 return status;
6037 }
6038
6039 /*
6040 * Decode RENEW response
6041 */
6042 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6043 void *__unused)
6044 {
6045 struct compound_hdr hdr;
6046 int status;
6047
6048 status = decode_compound_hdr(xdr, &hdr);
6049 if (!status)
6050 status = decode_renew(xdr);
6051 return status;
6052 }
6053
6054 /*
6055 * Decode SETCLIENTID response
6056 */
6057 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6058 struct xdr_stream *xdr,
6059 struct nfs4_setclientid_res *res)
6060 {
6061 struct compound_hdr hdr;
6062 int status;
6063
6064 status = decode_compound_hdr(xdr, &hdr);
6065 if (!status)
6066 status = decode_setclientid(xdr, res);
6067 return status;
6068 }
6069
6070 /*
6071 * Decode SETCLIENTID_CONFIRM response
6072 */
6073 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6074 struct xdr_stream *xdr,
6075 struct nfs_fsinfo *fsinfo)
6076 {
6077 struct compound_hdr hdr;
6078 int status;
6079
6080 status = decode_compound_hdr(xdr, &hdr);
6081 if (!status)
6082 status = decode_setclientid_confirm(xdr);
6083 if (!status)
6084 status = decode_putrootfh(xdr);
6085 if (!status)
6086 status = decode_fsinfo(xdr, fsinfo);
6087 return status;
6088 }
6089
6090 /*
6091 * Decode DELEGRETURN response
6092 */
6093 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6094 struct xdr_stream *xdr,
6095 struct nfs4_delegreturnres *res)
6096 {
6097 struct compound_hdr hdr;
6098 int status;
6099
6100 status = decode_compound_hdr(xdr, &hdr);
6101 if (status)
6102 goto out;
6103 status = decode_sequence(xdr, &res->seq_res, rqstp);
6104 if (status)
6105 goto out;
6106 status = decode_putfh(xdr);
6107 if (status != 0)
6108 goto out;
6109 status = decode_delegreturn(xdr);
6110 if (status != 0)
6111 goto out;
6112 decode_getfattr(xdr, res->fattr, res->server,
6113 !RPC_IS_ASYNC(rqstp->rq_task));
6114 out:
6115 return status;
6116 }
6117
6118 /*
6119 * Decode FS_LOCATIONS response
6120 */
6121 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6122 struct xdr_stream *xdr,
6123 struct nfs4_fs_locations_res *res)
6124 {
6125 struct compound_hdr hdr;
6126 int status;
6127
6128 status = decode_compound_hdr(xdr, &hdr);
6129 if (status)
6130 goto out;
6131 status = decode_sequence(xdr, &res->seq_res, req);
6132 if (status)
6133 goto out;
6134 status = decode_putfh(xdr);
6135 if (status)
6136 goto out;
6137 status = decode_lookup(xdr);
6138 if (status)
6139 goto out;
6140 xdr_enter_page(xdr, PAGE_SIZE);
6141 status = decode_getfattr(xdr, &res->fs_locations->fattr,
6142 res->fs_locations->server,
6143 !RPC_IS_ASYNC(req->rq_task));
6144 out:
6145 return status;
6146 }
6147
6148 /*
6149 * Decode SECINFO response
6150 */
6151 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6152 struct xdr_stream *xdr,
6153 struct nfs4_secinfo_res *res)
6154 {
6155 struct compound_hdr hdr;
6156 int status;
6157
6158 status = decode_compound_hdr(xdr, &hdr);
6159 if (status)
6160 goto out;
6161 status = decode_sequence(xdr, &res->seq_res, rqstp);
6162 if (status)
6163 goto out;
6164 status = decode_putfh(xdr);
6165 if (status)
6166 goto out;
6167 status = decode_secinfo(xdr, res);
6168 if (status)
6169 goto out;
6170 out:
6171 return status;
6172 }
6173
6174 #if defined(CONFIG_NFS_V4_1)
6175 /*
6176 * Decode EXCHANGE_ID response
6177 */
6178 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6179 struct xdr_stream *xdr,
6180 void *res)
6181 {
6182 struct compound_hdr hdr;
6183 int status;
6184
6185 status = decode_compound_hdr(xdr, &hdr);
6186 if (!status)
6187 status = decode_exchange_id(xdr, res);
6188 return status;
6189 }
6190
6191 /*
6192 * Decode CREATE_SESSION response
6193 */
6194 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6195 struct xdr_stream *xdr,
6196 struct nfs41_create_session_res *res)
6197 {
6198 struct compound_hdr hdr;
6199 int status;
6200
6201 status = decode_compound_hdr(xdr, &hdr);
6202 if (!status)
6203 status = decode_create_session(xdr, res);
6204 return status;
6205 }
6206
6207 /*
6208 * Decode DESTROY_SESSION response
6209 */
6210 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6211 struct xdr_stream *xdr,
6212 void *res)
6213 {
6214 struct compound_hdr hdr;
6215 int status;
6216
6217 status = decode_compound_hdr(xdr, &hdr);
6218 if (!status)
6219 status = decode_destroy_session(xdr, res);
6220 return status;
6221 }
6222
6223 /*
6224 * Decode SEQUENCE response
6225 */
6226 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6227 struct xdr_stream *xdr,
6228 struct nfs4_sequence_res *res)
6229 {
6230 struct compound_hdr hdr;
6231 int status;
6232
6233 status = decode_compound_hdr(xdr, &hdr);
6234 if (!status)
6235 status = decode_sequence(xdr, res, rqstp);
6236 return status;
6237 }
6238
6239 /*
6240 * Decode GET_LEASE_TIME response
6241 */
6242 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6243 struct xdr_stream *xdr,
6244 struct nfs4_get_lease_time_res *res)
6245 {
6246 struct compound_hdr hdr;
6247 int status;
6248
6249 status = decode_compound_hdr(xdr, &hdr);
6250 if (!status)
6251 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6252 if (!status)
6253 status = decode_putrootfh(xdr);
6254 if (!status)
6255 status = decode_fsinfo(xdr, res->lr_fsinfo);
6256 return status;
6257 }
6258
6259 /*
6260 * Decode RECLAIM_COMPLETE response
6261 */
6262 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6263 struct xdr_stream *xdr,
6264 struct nfs41_reclaim_complete_res *res)
6265 {
6266 struct compound_hdr hdr;
6267 int status;
6268
6269 status = decode_compound_hdr(xdr, &hdr);
6270 if (!status)
6271 status = decode_sequence(xdr, &res->seq_res, rqstp);
6272 if (!status)
6273 status = decode_reclaim_complete(xdr, (void *)NULL);
6274 return status;
6275 }
6276
6277 /*
6278 * Decode GETDEVINFO response
6279 */
6280 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6281 struct xdr_stream *xdr,
6282 struct nfs4_getdeviceinfo_res *res)
6283 {
6284 struct compound_hdr hdr;
6285 int status;
6286
6287 status = decode_compound_hdr(xdr, &hdr);
6288 if (status != 0)
6289 goto out;
6290 status = decode_sequence(xdr, &res->seq_res, rqstp);
6291 if (status != 0)
6292 goto out;
6293 status = decode_getdeviceinfo(xdr, res->pdev);
6294 out:
6295 return status;
6296 }
6297
6298 /*
6299 * Decode LAYOUTGET response
6300 */
6301 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6302 struct xdr_stream *xdr,
6303 struct nfs4_layoutget_res *res)
6304 {
6305 struct compound_hdr hdr;
6306 int status;
6307
6308 status = decode_compound_hdr(xdr, &hdr);
6309 if (status)
6310 goto out;
6311 status = decode_sequence(xdr, &res->seq_res, rqstp);
6312 if (status)
6313 goto out;
6314 status = decode_putfh(xdr);
6315 if (status)
6316 goto out;
6317 status = decode_layoutget(xdr, rqstp, res);
6318 out:
6319 return status;
6320 }
6321
6322 /*
6323 * Decode LAYOUTCOMMIT response
6324 */
6325 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6326 struct xdr_stream *xdr,
6327 struct nfs4_layoutcommit_res *res)
6328 {
6329 struct compound_hdr hdr;
6330 int status;
6331
6332 status = decode_compound_hdr(xdr, &hdr);
6333 if (status)
6334 goto out;
6335 status = decode_sequence(xdr, &res->seq_res, rqstp);
6336 if (status)
6337 goto out;
6338 status = decode_putfh(xdr);
6339 if (status)
6340 goto out;
6341 status = decode_layoutcommit(xdr, rqstp, res);
6342 if (status)
6343 goto out;
6344 decode_getfattr(xdr, res->fattr, res->server,
6345 !RPC_IS_ASYNC(rqstp->rq_task));
6346 out:
6347 return status;
6348 }
6349 #endif /* CONFIG_NFS_V4_1 */
6350
6351 /**
6352 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6353 * the local page cache.
6354 * @xdr: XDR stream where entry resides
6355 * @entry: buffer to fill in with entry data
6356 * @plus: boolean indicating whether this should be a readdirplus entry
6357 *
6358 * Returns zero if successful, otherwise a negative errno value is
6359 * returned.
6360 *
6361 * This function is not invoked during READDIR reply decoding, but
6362 * rather whenever an application invokes the getdents(2) system call
6363 * on a directory already in our cache.
6364 */
6365 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6366 int plus)
6367 {
6368 uint32_t bitmap[2] = {0};
6369 uint32_t len;
6370 __be32 *p = xdr_inline_decode(xdr, 4);
6371 if (unlikely(!p))
6372 goto out_overflow;
6373 if (*p == xdr_zero) {
6374 p = xdr_inline_decode(xdr, 4);
6375 if (unlikely(!p))
6376 goto out_overflow;
6377 if (*p == xdr_zero)
6378 return -EAGAIN;
6379 entry->eof = 1;
6380 return -EBADCOOKIE;
6381 }
6382
6383 p = xdr_inline_decode(xdr, 12);
6384 if (unlikely(!p))
6385 goto out_overflow;
6386 entry->prev_cookie = entry->cookie;
6387 p = xdr_decode_hyper(p, &entry->cookie);
6388 entry->len = be32_to_cpup(p);
6389
6390 p = xdr_inline_decode(xdr, entry->len);
6391 if (unlikely(!p))
6392 goto out_overflow;
6393 entry->name = (const char *) p;
6394
6395 /*
6396 * In case the server doesn't return an inode number,
6397 * we fake one here. (We don't use inode number 0,
6398 * since glibc seems to choke on it...)
6399 */
6400 entry->ino = 1;
6401 entry->fattr->valid = 0;
6402
6403 if (decode_attr_bitmap(xdr, bitmap) < 0)
6404 goto out_overflow;
6405
6406 if (decode_attr_length(xdr, &len, &p) < 0)
6407 goto out_overflow;
6408
6409 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6410 entry->server, 1) < 0)
6411 goto out_overflow;
6412 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6413 entry->ino = entry->fattr->mounted_on_fileid;
6414 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6415 entry->ino = entry->fattr->fileid;
6416
6417 entry->d_type = DT_UNKNOWN;
6418 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6419 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6420
6421 return 0;
6422
6423 out_overflow:
6424 print_overflow_msg(__func__, xdr);
6425 return -EAGAIN;
6426 }
6427
6428 /*
6429 * We need to translate between nfs status return values and
6430 * the local errno values which may not be the same.
6431 */
6432 static struct {
6433 int stat;
6434 int errno;
6435 } nfs_errtbl[] = {
6436 { NFS4_OK, 0 },
6437 { NFS4ERR_PERM, -EPERM },
6438 { NFS4ERR_NOENT, -ENOENT },
6439 { NFS4ERR_IO, -errno_NFSERR_IO},
6440 { NFS4ERR_NXIO, -ENXIO },
6441 { NFS4ERR_ACCESS, -EACCES },
6442 { NFS4ERR_EXIST, -EEXIST },
6443 { NFS4ERR_XDEV, -EXDEV },
6444 { NFS4ERR_NOTDIR, -ENOTDIR },
6445 { NFS4ERR_ISDIR, -EISDIR },
6446 { NFS4ERR_INVAL, -EINVAL },
6447 { NFS4ERR_FBIG, -EFBIG },
6448 { NFS4ERR_NOSPC, -ENOSPC },
6449 { NFS4ERR_ROFS, -EROFS },
6450 { NFS4ERR_MLINK, -EMLINK },
6451 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
6452 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
6453 { NFS4ERR_DQUOT, -EDQUOT },
6454 { NFS4ERR_STALE, -ESTALE },
6455 { NFS4ERR_BADHANDLE, -EBADHANDLE },
6456 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
6457 { NFS4ERR_NOTSUPP, -ENOTSUPP },
6458 { NFS4ERR_TOOSMALL, -ETOOSMALL },
6459 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
6460 { NFS4ERR_BADTYPE, -EBADTYPE },
6461 { NFS4ERR_LOCKED, -EAGAIN },
6462 { NFS4ERR_SYMLINK, -ELOOP },
6463 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
6464 { NFS4ERR_DEADLOCK, -EDEADLK },
6465 { -1, -EIO }
6466 };
6467
6468 /*
6469 * Convert an NFS error code to a local one.
6470 * This one is used jointly by NFSv2 and NFSv3.
6471 */
6472 static int
6473 nfs4_stat_to_errno(int stat)
6474 {
6475 int i;
6476 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6477 if (nfs_errtbl[i].stat == stat)
6478 return nfs_errtbl[i].errno;
6479 }
6480 if (stat <= 10000 || stat > 10100) {
6481 /* The server is looney tunes. */
6482 return -EREMOTEIO;
6483 }
6484 /* If we cannot translate the error, the recovery routines should
6485 * handle it.
6486 * Note: remaining NFSv4 error codes have values > 10000, so should
6487 * not conflict with native Linux error codes.
6488 */
6489 return -stat;
6490 }
6491
6492 #define PROC(proc, argtype, restype) \
6493 [NFSPROC4_CLNT_##proc] = { \
6494 .p_proc = NFSPROC4_COMPOUND, \
6495 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
6496 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
6497 .p_arglen = NFS4_##argtype##_sz, \
6498 .p_replen = NFS4_##restype##_sz, \
6499 .p_statidx = NFSPROC4_CLNT_##proc, \
6500 .p_name = #proc, \
6501 }
6502
6503 struct rpc_procinfo nfs4_procedures[] = {
6504 PROC(READ, enc_read, dec_read),
6505 PROC(WRITE, enc_write, dec_write),
6506 PROC(COMMIT, enc_commit, dec_commit),
6507 PROC(OPEN, enc_open, dec_open),
6508 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
6509 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
6510 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
6511 PROC(CLOSE, enc_close, dec_close),
6512 PROC(SETATTR, enc_setattr, dec_setattr),
6513 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
6514 PROC(RENEW, enc_renew, dec_renew),
6515 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
6516 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6517 PROC(LOCK, enc_lock, dec_lock),
6518 PROC(LOCKT, enc_lockt, dec_lockt),
6519 PROC(LOCKU, enc_locku, dec_locku),
6520 PROC(ACCESS, enc_access, dec_access),
6521 PROC(GETATTR, enc_getattr, dec_getattr),
6522 PROC(LOOKUP, enc_lookup, dec_lookup),
6523 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
6524 PROC(REMOVE, enc_remove, dec_remove),
6525 PROC(RENAME, enc_rename, dec_rename),
6526 PROC(LINK, enc_link, dec_link),
6527 PROC(SYMLINK, enc_symlink, dec_symlink),
6528 PROC(CREATE, enc_create, dec_create),
6529 PROC(PATHCONF, enc_pathconf, dec_pathconf),
6530 PROC(STATFS, enc_statfs, dec_statfs),
6531 PROC(READLINK, enc_readlink, dec_readlink),
6532 PROC(READDIR, enc_readdir, dec_readdir),
6533 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
6534 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
6535 PROC(GETACL, enc_getacl, dec_getacl),
6536 PROC(SETACL, enc_setacl, dec_setacl),
6537 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
6538 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
6539 PROC(SECINFO, enc_secinfo, dec_secinfo),
6540 #if defined(CONFIG_NFS_V4_1)
6541 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
6542 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
6543 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
6544 PROC(SEQUENCE, enc_sequence, dec_sequence),
6545 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
6546 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
6547 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
6548 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
6549 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
6550 #endif /* CONFIG_NFS_V4_1 */
6551 };
6552
6553 struct rpc_version nfs_version4 = {
6554 .number = 4,
6555 .nrprocs = ARRAY_SIZE(nfs4_procedures),
6556 .procs = nfs4_procedures
6557 };
6558
6559 /*
6560 * Local variables:
6561 * c-basic-offset: 8
6562 * End:
6563 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree