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drivers/char/hvc_console.c: remove unneeded __set_current_state(TASK_RUNNING)
[linux-2.6/next.git] / fs / nfs / nfs4xdr.c
blobf313c4cce7e4d1d087b8a1b47b55f769edf40a21
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/nfs.h>
50 #include <linux/nfs4.h>
51 #include <linux/nfs_fs.h>
52 #include <linux/nfs_idmap.h>
53 #include "nfs4_fs.h"
54 #include "internal.h"
55 #include "pnfs.h"
56
57 #define NFSDBG_FACILITY NFSDBG_XDR
58
59 /* Mapping from NFS error code to "errno" error code. */
60 #define errno_NFSERR_IO EIO
61
62 static int nfs4_stat_to_errno(int);
63
64 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
65 #ifdef DEBUG
66 #define NFS4_MAXTAGLEN 20
67 #else
68 #define NFS4_MAXTAGLEN 0
69 #endif
70
71 /* lock,open owner id:
72 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
73 */
74 #define open_owner_id_maxsz (1 + 4)
75 #define lock_owner_id_maxsz (1 + 4)
76 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
77 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
78 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
79 #define op_encode_hdr_maxsz (1)
80 #define op_decode_hdr_maxsz (2)
81 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
82 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
84 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
86 (NFS4_FHSIZE >> 2))
87 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
88 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
89 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
90 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
91 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
92 ((3+NFS4_FHSIZE) >> 2))
93 #define nfs4_fattr_bitmap_maxsz 3
94 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
95 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
96 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
97 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
98 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 /* This is based on getfattr, which uses the most attributes: */
100 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
101 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
102 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
103 nfs4_fattr_value_maxsz)
104 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
105 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
106 1 + 2 + 1 + \
107 nfs4_owner_maxsz + \
108 nfs4_group_maxsz + \
109 4 + 4)
110 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
111 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
112 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
113 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
114 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
115 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
116 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
117 #define decode_renew_maxsz (op_decode_hdr_maxsz)
118 #define encode_setclientid_maxsz \
119 (op_encode_hdr_maxsz + \
120 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
121 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
122 1 /* sc_prog */ + \
123 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
124 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
125 1) /* sc_cb_ident */
126 #define decode_setclientid_maxsz \
127 (op_decode_hdr_maxsz + \
128 2 + \
129 1024) /* large value for CLID_INUSE */
130 #define encode_setclientid_confirm_maxsz \
131 (op_encode_hdr_maxsz + \
132 3 + (NFS4_VERIFIER_SIZE >> 2))
133 #define decode_setclientid_confirm_maxsz \
134 (op_decode_hdr_maxsz)
135 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
136 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
137 #define encode_share_access_maxsz \
138 (2)
139 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
140 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
141 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
142 #define encode_open_maxsz (op_encode_hdr_maxsz + \
143 2 + encode_share_access_maxsz + 2 + \
144 open_owner_id_maxsz + \
145 encode_opentype_maxsz + \
146 encode_claim_null_maxsz)
147 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
148 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
149 decode_ace_maxsz)
150 #define decode_change_info_maxsz (5)
151 #define decode_open_maxsz (op_decode_hdr_maxsz + \
152 decode_stateid_maxsz + \
153 decode_change_info_maxsz + 1 + \
154 nfs4_fattr_bitmap_maxsz + \
155 decode_delegation_maxsz)
156 #define encode_open_confirm_maxsz \
157 (op_encode_hdr_maxsz + \
158 encode_stateid_maxsz + 1)
159 #define decode_open_confirm_maxsz \
160 (op_decode_hdr_maxsz + \
161 decode_stateid_maxsz)
162 #define encode_open_downgrade_maxsz \
163 (op_encode_hdr_maxsz + \
164 encode_stateid_maxsz + 1 + \
165 encode_share_access_maxsz)
166 #define decode_open_downgrade_maxsz \
167 (op_decode_hdr_maxsz + \
168 decode_stateid_maxsz)
169 #define encode_close_maxsz (op_encode_hdr_maxsz + \
170 1 + encode_stateid_maxsz)
171 #define decode_close_maxsz (op_decode_hdr_maxsz + \
172 decode_stateid_maxsz)
173 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
174 encode_stateid_maxsz + \
175 encode_attrs_maxsz)
176 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
177 nfs4_fattr_bitmap_maxsz)
178 #define encode_read_maxsz (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 3)
180 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
181 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
182 2 + encode_verifier_maxsz + 5)
183 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
184 decode_verifier_maxsz)
185 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
186 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
187 #define encode_write_maxsz (op_encode_hdr_maxsz + \
188 encode_stateid_maxsz + 4)
189 #define decode_write_maxsz (op_decode_hdr_maxsz + \
190 2 + decode_verifier_maxsz)
191 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
192 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
193 decode_verifier_maxsz)
194 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
195 nfs4_name_maxsz)
196 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
197 decode_change_info_maxsz)
198 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
199 2 * nfs4_name_maxsz)
200 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
201 decode_change_info_maxsz + \
202 decode_change_info_maxsz)
203 #define encode_link_maxsz (op_encode_hdr_maxsz + \
204 nfs4_name_maxsz)
205 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
206 #define encode_lockowner_maxsz (7)
207 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
208 7 + \
209 1 + encode_stateid_maxsz + 1 + \
210 encode_lockowner_maxsz)
211 #define decode_lock_denied_maxsz \
212 (8 + decode_lockowner_maxsz)
213 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
214 decode_lock_denied_maxsz)
215 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
216 encode_lockowner_maxsz)
217 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
218 decode_lock_denied_maxsz)
219 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
220 encode_stateid_maxsz + \
221 4)
222 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
223 decode_stateid_maxsz)
224 #define encode_release_lockowner_maxsz \
225 (op_encode_hdr_maxsz + \
226 encode_lockowner_maxsz)
227 #define decode_release_lockowner_maxsz \
228 (op_decode_hdr_maxsz)
229 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
230 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
231 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
232 1 + nfs4_name_maxsz + \
233 1 + \
234 nfs4_fattr_maxsz)
235 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
236 #define encode_create_maxsz (op_encode_hdr_maxsz + \
237 1 + 2 + nfs4_name_maxsz + \
238 encode_attrs_maxsz)
239 #define decode_create_maxsz (op_decode_hdr_maxsz + \
240 decode_change_info_maxsz + \
241 nfs4_fattr_bitmap_maxsz)
242 #define encode_statfs_maxsz (encode_getattr_maxsz)
243 #define decode_statfs_maxsz (decode_getattr_maxsz)
244 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
245 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
246 #define encode_getacl_maxsz (encode_getattr_maxsz)
247 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
248 nfs4_fattr_bitmap_maxsz + 1)
249 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
250 encode_stateid_maxsz + 3)
251 #define decode_setacl_maxsz (decode_setattr_maxsz)
252 #define encode_fs_locations_maxsz \
253 (encode_getattr_maxsz)
254 #define decode_fs_locations_maxsz \
255 (0)
256
257 #if defined(CONFIG_NFS_V4_1)
258 #define NFS4_MAX_MACHINE_NAME_LEN (64)
259
260 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
261 encode_verifier_maxsz + \
262 1 /* co_ownerid.len */ + \
263 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
264 1 /* flags */ + \
265 1 /* spa_how */ + \
266 0 /* SP4_NONE (for now) */ + \
267 1 /* zero implemetation id array */)
268 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
269 2 /* eir_clientid */ + \
270 1 /* eir_sequenceid */ + \
271 1 /* eir_flags */ + \
272 1 /* spr_how */ + \
273 0 /* SP4_NONE (for now) */ + \
274 2 /* eir_server_owner.so_minor_id */ + \
275 /* eir_server_owner.so_major_id<> */ \
276 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
277 /* eir_server_scope<> */ \
278 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
279 1 /* eir_server_impl_id array length */ + \
280 0 /* ignored eir_server_impl_id contents */)
281 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
282 #define decode_channel_attrs_maxsz (6 + \
283 1 /* ca_rdma_ird.len */ + \
284 1 /* ca_rdma_ird */)
285 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
286 2 /* csa_clientid */ + \
287 1 /* csa_sequence */ + \
288 1 /* csa_flags */ + \
289 encode_channel_attrs_maxsz + \
290 encode_channel_attrs_maxsz + \
291 1 /* csa_cb_program */ + \
292 1 /* csa_sec_parms.len (1) */ + \
293 1 /* cb_secflavor (AUTH_SYS) */ + \
294 1 /* stamp */ + \
295 1 /* machinename.len */ + \
296 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
297 1 /* uid */ + \
298 1 /* gid */ + \
299 1 /* gids.len (0) */)
300 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
301 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
302 1 /* csr_sequence */ + \
303 1 /* csr_flags */ + \
304 decode_channel_attrs_maxsz + \
305 decode_channel_attrs_maxsz)
306 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
307 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
308 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
309 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
310 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
311 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
312 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
313 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
314 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
315 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
316 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
317 1 /* layout type */ + \
318 1 /* opaque devaddr4 length */ + \
319 /* devaddr4 payload is read into page */ \
320 1 /* notification bitmap length */ + \
321 1 /* notification bitmap */)
322 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
323 encode_stateid_maxsz)
324 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
325 decode_stateid_maxsz + \
326 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
327 #else /* CONFIG_NFS_V4_1 */
328 #define encode_sequence_maxsz 0
329 #define decode_sequence_maxsz 0
330 #endif /* CONFIG_NFS_V4_1 */
331
332 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
333 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
334 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
335 encode_sequence_maxsz + \
336 encode_putfh_maxsz + \
337 encode_read_maxsz)
338 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
339 decode_sequence_maxsz + \
340 decode_putfh_maxsz + \
341 decode_read_maxsz)
342 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
343 encode_sequence_maxsz + \
344 encode_putfh_maxsz + \
345 encode_readlink_maxsz)
346 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
347 decode_sequence_maxsz + \
348 decode_putfh_maxsz + \
349 decode_readlink_maxsz)
350 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
351 encode_sequence_maxsz + \
352 encode_putfh_maxsz + \
353 encode_readdir_maxsz)
354 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
355 decode_sequence_maxsz + \
356 decode_putfh_maxsz + \
357 decode_readdir_maxsz)
358 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
359 encode_sequence_maxsz + \
360 encode_putfh_maxsz + \
361 encode_write_maxsz + \
362 encode_getattr_maxsz)
363 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
364 decode_sequence_maxsz + \
365 decode_putfh_maxsz + \
366 decode_write_maxsz + \
367 decode_getattr_maxsz)
368 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
369 encode_sequence_maxsz + \
370 encode_putfh_maxsz + \
371 encode_commit_maxsz + \
372 encode_getattr_maxsz)
373 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
374 decode_sequence_maxsz + \
375 decode_putfh_maxsz + \
376 decode_commit_maxsz + \
377 decode_getattr_maxsz)
378 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
379 encode_sequence_maxsz + \
380 encode_putfh_maxsz + \
381 encode_savefh_maxsz + \
382 encode_open_maxsz + \
383 encode_getfh_maxsz + \
384 encode_getattr_maxsz + \
385 encode_restorefh_maxsz + \
386 encode_getattr_maxsz)
387 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
388 decode_sequence_maxsz + \
389 decode_putfh_maxsz + \
390 decode_savefh_maxsz + \
391 decode_open_maxsz + \
392 decode_getfh_maxsz + \
393 decode_getattr_maxsz + \
394 decode_restorefh_maxsz + \
395 decode_getattr_maxsz)
396 #define NFS4_enc_open_confirm_sz \
397 (compound_encode_hdr_maxsz + \
398 encode_putfh_maxsz + \
399 encode_open_confirm_maxsz)
400 #define NFS4_dec_open_confirm_sz \
401 (compound_decode_hdr_maxsz + \
402 decode_putfh_maxsz + \
403 decode_open_confirm_maxsz)
404 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
405 encode_sequence_maxsz + \
406 encode_putfh_maxsz + \
407 encode_open_maxsz + \
408 encode_getattr_maxsz)
409 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
410 decode_sequence_maxsz + \
411 decode_putfh_maxsz + \
412 decode_open_maxsz + \
413 decode_getattr_maxsz)
414 #define NFS4_enc_open_downgrade_sz \
415 (compound_encode_hdr_maxsz + \
416 encode_sequence_maxsz + \
417 encode_putfh_maxsz + \
418 encode_open_downgrade_maxsz + \
419 encode_getattr_maxsz)
420 #define NFS4_dec_open_downgrade_sz \
421 (compound_decode_hdr_maxsz + \
422 decode_sequence_maxsz + \
423 decode_putfh_maxsz + \
424 decode_open_downgrade_maxsz + \
425 decode_getattr_maxsz)
426 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
427 encode_sequence_maxsz + \
428 encode_putfh_maxsz + \
429 encode_close_maxsz + \
430 encode_getattr_maxsz)
431 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
432 decode_sequence_maxsz + \
433 decode_putfh_maxsz + \
434 decode_close_maxsz + \
435 decode_getattr_maxsz)
436 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
437 encode_sequence_maxsz + \
438 encode_putfh_maxsz + \
439 encode_setattr_maxsz + \
440 encode_getattr_maxsz)
441 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_setattr_maxsz + \
445 decode_getattr_maxsz)
446 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
447 encode_sequence_maxsz + \
448 encode_putfh_maxsz + \
449 encode_fsinfo_maxsz)
450 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
451 decode_sequence_maxsz + \
452 decode_putfh_maxsz + \
453 decode_fsinfo_maxsz)
454 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
455 encode_renew_maxsz)
456 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
457 decode_renew_maxsz)
458 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
459 encode_setclientid_maxsz)
460 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
461 decode_setclientid_maxsz)
462 #define NFS4_enc_setclientid_confirm_sz \
463 (compound_encode_hdr_maxsz + \
464 encode_setclientid_confirm_maxsz + \
465 encode_putrootfh_maxsz + \
466 encode_fsinfo_maxsz)
467 #define NFS4_dec_setclientid_confirm_sz \
468 (compound_decode_hdr_maxsz + \
469 decode_setclientid_confirm_maxsz + \
470 decode_putrootfh_maxsz + \
471 decode_fsinfo_maxsz)
472 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
473 encode_sequence_maxsz + \
474 encode_putfh_maxsz + \
475 encode_lock_maxsz)
476 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
477 decode_sequence_maxsz + \
478 decode_putfh_maxsz + \
479 decode_lock_maxsz)
480 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
481 encode_sequence_maxsz + \
482 encode_putfh_maxsz + \
483 encode_lockt_maxsz)
484 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
485 decode_sequence_maxsz + \
486 decode_putfh_maxsz + \
487 decode_lockt_maxsz)
488 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
489 encode_sequence_maxsz + \
490 encode_putfh_maxsz + \
491 encode_locku_maxsz)
492 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
493 decode_sequence_maxsz + \
494 decode_putfh_maxsz + \
495 decode_locku_maxsz)
496 #define NFS4_enc_release_lockowner_sz \
497 (compound_encode_hdr_maxsz + \
498 encode_lockowner_maxsz)
499 #define NFS4_dec_release_lockowner_sz \
500 (compound_decode_hdr_maxsz + \
501 decode_lockowner_maxsz)
502 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putfh_maxsz + \
505 encode_access_maxsz + \
506 encode_getattr_maxsz)
507 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
508 decode_sequence_maxsz + \
509 decode_putfh_maxsz + \
510 decode_access_maxsz + \
511 decode_getattr_maxsz)
512 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
513 encode_sequence_maxsz + \
514 encode_putfh_maxsz + \
515 encode_getattr_maxsz)
516 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
517 decode_sequence_maxsz + \
518 decode_putfh_maxsz + \
519 decode_getattr_maxsz)
520 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
521 encode_sequence_maxsz + \
522 encode_putfh_maxsz + \
523 encode_lookup_maxsz + \
524 encode_getattr_maxsz + \
525 encode_getfh_maxsz)
526 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
527 decode_sequence_maxsz + \
528 decode_putfh_maxsz + \
529 decode_lookup_maxsz + \
530 decode_getattr_maxsz + \
531 decode_getfh_maxsz)
532 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
533 encode_sequence_maxsz + \
534 encode_putrootfh_maxsz + \
535 encode_getattr_maxsz + \
536 encode_getfh_maxsz)
537 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
538 decode_sequence_maxsz + \
539 decode_putrootfh_maxsz + \
540 decode_getattr_maxsz + \
541 decode_getfh_maxsz)
542 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
543 encode_sequence_maxsz + \
544 encode_putfh_maxsz + \
545 encode_remove_maxsz + \
546 encode_getattr_maxsz)
547 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
548 decode_sequence_maxsz + \
549 decode_putfh_maxsz + \
550 decode_remove_maxsz + \
551 decode_getattr_maxsz)
552 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
553 encode_sequence_maxsz + \
554 encode_putfh_maxsz + \
555 encode_savefh_maxsz + \
556 encode_putfh_maxsz + \
557 encode_rename_maxsz + \
558 encode_getattr_maxsz + \
559 encode_restorefh_maxsz + \
560 encode_getattr_maxsz)
561 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_savefh_maxsz + \
565 decode_putfh_maxsz + \
566 decode_rename_maxsz + \
567 decode_getattr_maxsz + \
568 decode_restorefh_maxsz + \
569 decode_getattr_maxsz)
570 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
571 encode_sequence_maxsz + \
572 encode_putfh_maxsz + \
573 encode_savefh_maxsz + \
574 encode_putfh_maxsz + \
575 encode_link_maxsz + \
576 decode_getattr_maxsz + \
577 encode_restorefh_maxsz + \
578 decode_getattr_maxsz)
579 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putfh_maxsz + \
582 decode_savefh_maxsz + \
583 decode_putfh_maxsz + \
584 decode_link_maxsz + \
585 decode_getattr_maxsz + \
586 decode_restorefh_maxsz + \
587 decode_getattr_maxsz)
588 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
589 encode_sequence_maxsz + \
590 encode_putfh_maxsz + \
591 encode_symlink_maxsz + \
592 encode_getattr_maxsz + \
593 encode_getfh_maxsz)
594 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_symlink_maxsz + \
598 decode_getattr_maxsz + \
599 decode_getfh_maxsz)
600 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
601 encode_sequence_maxsz + \
602 encode_putfh_maxsz + \
603 encode_savefh_maxsz + \
604 encode_create_maxsz + \
605 encode_getfh_maxsz + \
606 encode_getattr_maxsz + \
607 encode_restorefh_maxsz + \
608 encode_getattr_maxsz)
609 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
610 decode_sequence_maxsz + \
611 decode_putfh_maxsz + \
612 decode_savefh_maxsz + \
613 decode_create_maxsz + \
614 decode_getfh_maxsz + \
615 decode_getattr_maxsz + \
616 decode_restorefh_maxsz + \
617 decode_getattr_maxsz)
618 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
619 encode_sequence_maxsz + \
620 encode_putfh_maxsz + \
621 encode_getattr_maxsz)
622 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
623 decode_sequence_maxsz + \
624 decode_putfh_maxsz + \
625 decode_getattr_maxsz)
626 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
627 encode_sequence_maxsz + \
628 encode_putfh_maxsz + \
629 encode_statfs_maxsz)
630 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
631 decode_sequence_maxsz + \
632 decode_putfh_maxsz + \
633 decode_statfs_maxsz)
634 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
635 encode_sequence_maxsz + \
636 encode_putfh_maxsz + \
637 encode_getattr_maxsz)
638 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
639 decode_sequence_maxsz + \
640 decode_putfh_maxsz + \
641 decode_getattr_maxsz)
642 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
643 encode_sequence_maxsz + \
644 encode_putfh_maxsz + \
645 encode_delegreturn_maxsz + \
646 encode_getattr_maxsz)
647 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
648 decode_sequence_maxsz + \
649 decode_delegreturn_maxsz + \
650 decode_getattr_maxsz)
651 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
652 encode_sequence_maxsz + \
653 encode_putfh_maxsz + \
654 encode_getacl_maxsz)
655 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
656 decode_sequence_maxsz + \
657 decode_putfh_maxsz + \
658 decode_getacl_maxsz)
659 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
660 encode_sequence_maxsz + \
661 encode_putfh_maxsz + \
662 encode_setacl_maxsz)
663 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
664 decode_sequence_maxsz + \
665 decode_putfh_maxsz + \
666 decode_setacl_maxsz)
667 #define NFS4_enc_fs_locations_sz \
668 (compound_encode_hdr_maxsz + \
669 encode_sequence_maxsz + \
670 encode_putfh_maxsz + \
671 encode_lookup_maxsz + \
672 encode_fs_locations_maxsz)
673 #define NFS4_dec_fs_locations_sz \
674 (compound_decode_hdr_maxsz + \
675 decode_sequence_maxsz + \
676 decode_putfh_maxsz + \
677 decode_lookup_maxsz + \
678 decode_fs_locations_maxsz)
679 #if defined(CONFIG_NFS_V4_1)
680 #define NFS4_enc_exchange_id_sz \
681 (compound_encode_hdr_maxsz + \
682 encode_exchange_id_maxsz)
683 #define NFS4_dec_exchange_id_sz \
684 (compound_decode_hdr_maxsz + \
685 decode_exchange_id_maxsz)
686 #define NFS4_enc_create_session_sz \
687 (compound_encode_hdr_maxsz + \
688 encode_create_session_maxsz)
689 #define NFS4_dec_create_session_sz \
690 (compound_decode_hdr_maxsz + \
691 decode_create_session_maxsz)
692 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
693 encode_destroy_session_maxsz)
694 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
695 decode_destroy_session_maxsz)
696 #define NFS4_enc_sequence_sz \
697 (compound_decode_hdr_maxsz + \
698 encode_sequence_maxsz)
699 #define NFS4_dec_sequence_sz \
700 (compound_decode_hdr_maxsz + \
701 decode_sequence_maxsz)
702 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
703 encode_sequence_maxsz + \
704 encode_putrootfh_maxsz + \
705 encode_fsinfo_maxsz)
706 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
707 decode_sequence_maxsz + \
708 decode_putrootfh_maxsz + \
709 decode_fsinfo_maxsz)
710 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
711 encode_sequence_maxsz + \
712 encode_reclaim_complete_maxsz)
713 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
714 decode_sequence_maxsz + \
715 decode_reclaim_complete_maxsz)
716 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
717 encode_sequence_maxsz +\
718 encode_getdeviceinfo_maxsz)
719 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_getdeviceinfo_maxsz)
722 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
723 encode_sequence_maxsz + \
724 encode_putfh_maxsz + \
725 encode_layoutget_maxsz)
726 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
727 decode_sequence_maxsz + \
728 decode_putfh_maxsz + \
729 decode_layoutget_maxsz)
730
731 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
732 compound_encode_hdr_maxsz +
733 encode_sequence_maxsz +
734 encode_putfh_maxsz +
735 encode_getattr_maxsz) *
736 XDR_UNIT);
737
738 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
739 compound_decode_hdr_maxsz +
740 decode_sequence_maxsz +
741 decode_putfh_maxsz) *
742 XDR_UNIT);
743 #endif /* CONFIG_NFS_V4_1 */
744
745 static const umode_t nfs_type2fmt[] = {
746 [NF4BAD] = 0,
747 [NF4REG] = S_IFREG,
748 [NF4DIR] = S_IFDIR,
749 [NF4BLK] = S_IFBLK,
750 [NF4CHR] = S_IFCHR,
751 [NF4LNK] = S_IFLNK,
752 [NF4SOCK] = S_IFSOCK,
753 [NF4FIFO] = S_IFIFO,
754 [NF4ATTRDIR] = 0,
755 [NF4NAMEDATTR] = 0,
756 };
757
758 struct compound_hdr {
759 int32_t status;
760 uint32_t nops;
761 __be32 * nops_p;
762 uint32_t taglen;
763 char * tag;
764 uint32_t replen; /* expected reply words */
765 u32 minorversion;
766 };
767
768 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
769 {
770 __be32 *p = xdr_reserve_space(xdr, nbytes);
771 BUG_ON(!p);
772 return p;
773 }
774
775 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
776 {
777 __be32 *p;
778
779 p = xdr_reserve_space(xdr, 4 + len);
780 BUG_ON(p == NULL);
781 xdr_encode_opaque(p, str, len);
782 }
783
784 static void encode_compound_hdr(struct xdr_stream *xdr,
785 struct rpc_rqst *req,
786 struct compound_hdr *hdr)
787 {
788 __be32 *p;
789 struct rpc_auth *auth = req->rq_cred->cr_auth;
790
791 /* initialize running count of expected bytes in reply.
792 * NOTE: the replied tag SHOULD be the same is the one sent,
793 * but this is not required as a MUST for the server to do so. */
794 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
795
796 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
797 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
798 p = reserve_space(xdr, 4 + hdr->taglen + 8);
799 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
800 *p++ = cpu_to_be32(hdr->minorversion);
801 hdr->nops_p = p;
802 *p = cpu_to_be32(hdr->nops);
803 }
804
805 static void encode_nops(struct compound_hdr *hdr)
806 {
807 BUG_ON(hdr->nops > NFS4_MAX_OPS);
808 *hdr->nops_p = htonl(hdr->nops);
809 }
810
811 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
812 {
813 __be32 *p;
814
815 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
816 BUG_ON(p == NULL);
817 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
818 }
819
820 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
821 {
822 char owner_name[IDMAP_NAMESZ];
823 char owner_group[IDMAP_NAMESZ];
824 int owner_namelen = 0;
825 int owner_grouplen = 0;
826 __be32 *p;
827 __be32 *q;
828 int len;
829 uint32_t bmval0 = 0;
830 uint32_t bmval1 = 0;
831
832 /*
833 * We reserve enough space to write the entire attribute buffer at once.
834 * In the worst-case, this would be
835 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
836 * = 36 bytes, plus any contribution from variable-length fields
837 * such as owner/group.
838 */
839 len = 16;
840
841 /* Sigh */
842 if (iap->ia_valid & ATTR_SIZE)
843 len += 8;
844 if (iap->ia_valid & ATTR_MODE)
845 len += 4;
846 if (iap->ia_valid & ATTR_UID) {
847 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
848 if (owner_namelen < 0) {
849 dprintk("nfs: couldn't resolve uid %d to string\n",
850 iap->ia_uid);
851 /* XXX */
852 strcpy(owner_name, "nobody");
853 owner_namelen = sizeof("nobody") - 1;
854 /* goto out; */
855 }
856 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
857 }
858 if (iap->ia_valid & ATTR_GID) {
859 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
860 if (owner_grouplen < 0) {
861 dprintk("nfs: couldn't resolve gid %d to string\n",
862 iap->ia_gid);
863 strcpy(owner_group, "nobody");
864 owner_grouplen = sizeof("nobody") - 1;
865 /* goto out; */
866 }
867 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
868 }
869 if (iap->ia_valid & ATTR_ATIME_SET)
870 len += 16;
871 else if (iap->ia_valid & ATTR_ATIME)
872 len += 4;
873 if (iap->ia_valid & ATTR_MTIME_SET)
874 len += 16;
875 else if (iap->ia_valid & ATTR_MTIME)
876 len += 4;
877 p = reserve_space(xdr, len);
878
879 /*
880 * We write the bitmap length now, but leave the bitmap and the attribute
881 * buffer length to be backfilled at the end of this routine.
882 */
883 *p++ = cpu_to_be32(2);
884 q = p;
885 p += 3;
886
887 if (iap->ia_valid & ATTR_SIZE) {
888 bmval0 |= FATTR4_WORD0_SIZE;
889 p = xdr_encode_hyper(p, iap->ia_size);
890 }
891 if (iap->ia_valid & ATTR_MODE) {
892 bmval1 |= FATTR4_WORD1_MODE;
893 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
894 }
895 if (iap->ia_valid & ATTR_UID) {
896 bmval1 |= FATTR4_WORD1_OWNER;
897 p = xdr_encode_opaque(p, owner_name, owner_namelen);
898 }
899 if (iap->ia_valid & ATTR_GID) {
900 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
901 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
902 }
903 if (iap->ia_valid & ATTR_ATIME_SET) {
904 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
905 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
906 *p++ = cpu_to_be32(0);
907 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
908 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
909 }
910 else if (iap->ia_valid & ATTR_ATIME) {
911 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
912 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
913 }
914 if (iap->ia_valid & ATTR_MTIME_SET) {
915 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
916 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
917 *p++ = cpu_to_be32(0);
918 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
919 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
920 }
921 else if (iap->ia_valid & ATTR_MTIME) {
922 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
923 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
924 }
925
926 /*
927 * Now we backfill the bitmap and the attribute buffer length.
928 */
929 if (len != ((char *)p - (char *)q) + 4) {
930 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
931 len, ((char *)p - (char *)q) + 4);
932 BUG();
933 }
934 len = (char *)p - (char *)q - 12;
935 *q++ = htonl(bmval0);
936 *q++ = htonl(bmval1);
937 *q = htonl(len);
938
939 /* out: */
940 }
941
942 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
943 {
944 __be32 *p;
945
946 p = reserve_space(xdr, 8);
947 *p++ = cpu_to_be32(OP_ACCESS);
948 *p = cpu_to_be32(access);
949 hdr->nops++;
950 hdr->replen += decode_access_maxsz;
951 }
952
953 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
954 {
955 __be32 *p;
956
957 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
958 *p++ = cpu_to_be32(OP_CLOSE);
959 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
960 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
961 hdr->nops++;
962 hdr->replen += decode_close_maxsz;
963 }
964
965 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
966 {
967 __be32 *p;
968
969 p = reserve_space(xdr, 16);
970 *p++ = cpu_to_be32(OP_COMMIT);
971 p = xdr_encode_hyper(p, args->offset);
972 *p = cpu_to_be32(args->count);
973 hdr->nops++;
974 hdr->replen += decode_commit_maxsz;
975 }
976
977 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
978 {
979 __be32 *p;
980
981 p = reserve_space(xdr, 8);
982 *p++ = cpu_to_be32(OP_CREATE);
983 *p = cpu_to_be32(create->ftype);
984
985 switch (create->ftype) {
986 case NF4LNK:
987 p = reserve_space(xdr, 4);
988 *p = cpu_to_be32(create->u.symlink.len);
989 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
990 break;
991
992 case NF4BLK: case NF4CHR:
993 p = reserve_space(xdr, 8);
994 *p++ = cpu_to_be32(create->u.device.specdata1);
995 *p = cpu_to_be32(create->u.device.specdata2);
996 break;
997
998 default:
999 break;
1000 }
1001
1002 encode_string(xdr, create->name->len, create->name->name);
1003 hdr->nops++;
1004 hdr->replen += decode_create_maxsz;
1005
1006 encode_attrs(xdr, create->attrs, create->server);
1007 }
1008
1009 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1010 {
1011 __be32 *p;
1012
1013 p = reserve_space(xdr, 12);
1014 *p++ = cpu_to_be32(OP_GETATTR);
1015 *p++ = cpu_to_be32(1);
1016 *p = cpu_to_be32(bitmap);
1017 hdr->nops++;
1018 hdr->replen += decode_getattr_maxsz;
1019 }
1020
1021 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1022 {
1023 __be32 *p;
1024
1025 p = reserve_space(xdr, 16);
1026 *p++ = cpu_to_be32(OP_GETATTR);
1027 *p++ = cpu_to_be32(2);
1028 *p++ = cpu_to_be32(bm0);
1029 *p = cpu_to_be32(bm1);
1030 hdr->nops++;
1031 hdr->replen += decode_getattr_maxsz;
1032 }
1033
1034 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1035 {
1036 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1037 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1038 }
1039
1040 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1041 {
1042 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1043 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1044 }
1045
1046 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1047 {
1048 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1049 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1050 }
1051
1052 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1053 {
1054 __be32 *p;
1055
1056 p = reserve_space(xdr, 4);
1057 *p = cpu_to_be32(OP_GETFH);
1058 hdr->nops++;
1059 hdr->replen += decode_getfh_maxsz;
1060 }
1061
1062 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1063 {
1064 __be32 *p;
1065
1066 p = reserve_space(xdr, 8 + name->len);
1067 *p++ = cpu_to_be32(OP_LINK);
1068 xdr_encode_opaque(p, name->name, name->len);
1069 hdr->nops++;
1070 hdr->replen += decode_link_maxsz;
1071 }
1072
1073 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1074 {
1075 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1076 return block ? NFS4_READW_LT : NFS4_READ_LT;
1077 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1078 }
1079
1080 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1081 {
1082 if (fl->fl_end == OFFSET_MAX)
1083 return ~(uint64_t)0;
1084 return fl->fl_end - fl->fl_start + 1;
1085 }
1086
1087 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1088 {
1089 __be32 *p;
1090
1091 p = reserve_space(xdr, 28);
1092 p = xdr_encode_hyper(p, lowner->clientid);
1093 *p++ = cpu_to_be32(16);
1094 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1095 xdr_encode_hyper(p, lowner->id);
1096 }
1097
1098 /*
1099 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1100 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1101 */
1102 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1103 {
1104 __be32 *p;
1105
1106 p = reserve_space(xdr, 32);
1107 *p++ = cpu_to_be32(OP_LOCK);
1108 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1109 *p++ = cpu_to_be32(args->reclaim);
1110 p = xdr_encode_hyper(p, args->fl->fl_start);
1111 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1112 *p = cpu_to_be32(args->new_lock_owner);
1113 if (args->new_lock_owner){
1114 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1115 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1116 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1117 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1118 encode_lockowner(xdr, &args->lock_owner);
1119 }
1120 else {
1121 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1122 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1123 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1124 }
1125 hdr->nops++;
1126 hdr->replen += decode_lock_maxsz;
1127 }
1128
1129 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1130 {
1131 __be32 *p;
1132
1133 p = reserve_space(xdr, 24);
1134 *p++ = cpu_to_be32(OP_LOCKT);
1135 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1136 p = xdr_encode_hyper(p, args->fl->fl_start);
1137 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1138 encode_lockowner(xdr, &args->lock_owner);
1139 hdr->nops++;
1140 hdr->replen += decode_lockt_maxsz;
1141 }
1142
1143 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1144 {
1145 __be32 *p;
1146
1147 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1148 *p++ = cpu_to_be32(OP_LOCKU);
1149 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1150 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1151 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1152 p = xdr_encode_hyper(p, args->fl->fl_start);
1153 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1154 hdr->nops++;
1155 hdr->replen += decode_locku_maxsz;
1156 }
1157
1158 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1159 {
1160 __be32 *p;
1161
1162 p = reserve_space(xdr, 4);
1163 *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1164 encode_lockowner(xdr, lowner);
1165 hdr->nops++;
1166 hdr->replen += decode_release_lockowner_maxsz;
1167 }
1168
1169 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1170 {
1171 int len = name->len;
1172 __be32 *p;
1173
1174 p = reserve_space(xdr, 8 + len);
1175 *p++ = cpu_to_be32(OP_LOOKUP);
1176 xdr_encode_opaque(p, name->name, len);
1177 hdr->nops++;
1178 hdr->replen += decode_lookup_maxsz;
1179 }
1180
1181 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1182 {
1183 __be32 *p;
1184
1185 p = reserve_space(xdr, 8);
1186 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1187 case FMODE_READ:
1188 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1189 break;
1190 case FMODE_WRITE:
1191 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1192 break;
1193 case FMODE_READ|FMODE_WRITE:
1194 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1195 break;
1196 default:
1197 *p++ = cpu_to_be32(0);
1198 }
1199 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1200 }
1201
1202 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1203 {
1204 __be32 *p;
1205 /*
1206 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1207 * owner 4 = 32
1208 */
1209 p = reserve_space(xdr, 8);
1210 *p++ = cpu_to_be32(OP_OPEN);
1211 *p = cpu_to_be32(arg->seqid->sequence->counter);
1212 encode_share_access(xdr, arg->fmode);
1213 p = reserve_space(xdr, 28);
1214 p = xdr_encode_hyper(p, arg->clientid);
1215 *p++ = cpu_to_be32(16);
1216 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1217 xdr_encode_hyper(p, arg->id);
1218 }
1219
1220 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1221 {
1222 __be32 *p;
1223 struct nfs_client *clp;
1224
1225 p = reserve_space(xdr, 4);
1226 switch(arg->open_flags & O_EXCL) {
1227 case 0:
1228 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1229 encode_attrs(xdr, arg->u.attrs, arg->server);
1230 break;
1231 default:
1232 clp = arg->server->nfs_client;
1233 if (clp->cl_mvops->minor_version > 0) {
1234 if (nfs4_has_persistent_session(clp)) {
1235 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1236 encode_attrs(xdr, arg->u.attrs, arg->server);
1237 } else {
1238 struct iattr dummy;
1239
1240 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1241 encode_nfs4_verifier(xdr, &arg->u.verifier);
1242 dummy.ia_valid = 0;
1243 encode_attrs(xdr, &dummy, arg->server);
1244 }
1245 } else {
1246 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1247 encode_nfs4_verifier(xdr, &arg->u.verifier);
1248 }
1249 }
1250 }
1251
1252 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1253 {
1254 __be32 *p;
1255
1256 p = reserve_space(xdr, 4);
1257 switch (arg->open_flags & O_CREAT) {
1258 case 0:
1259 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1260 break;
1261 default:
1262 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1263 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1264 encode_createmode(xdr, arg);
1265 }
1266 }
1267
1268 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1269 {
1270 __be32 *p;
1271
1272 p = reserve_space(xdr, 4);
1273 switch (delegation_type) {
1274 case 0:
1275 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1276 break;
1277 case FMODE_READ:
1278 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1279 break;
1280 case FMODE_WRITE|FMODE_READ:
1281 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1282 break;
1283 default:
1284 BUG();
1285 }
1286 }
1287
1288 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1289 {
1290 __be32 *p;
1291
1292 p = reserve_space(xdr, 4);
1293 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1294 encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1298 {
1299 __be32 *p;
1300
1301 p = reserve_space(xdr, 4);
1302 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1303 encode_delegation_type(xdr, type);
1304 }
1305
1306 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1307 {
1308 __be32 *p;
1309
1310 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1311 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1312 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1313 encode_string(xdr, name->len, name->name);
1314 }
1315
1316 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1317 {
1318 encode_openhdr(xdr, arg);
1319 encode_opentype(xdr, arg);
1320 switch (arg->claim) {
1321 case NFS4_OPEN_CLAIM_NULL:
1322 encode_claim_null(xdr, arg->name);
1323 break;
1324 case NFS4_OPEN_CLAIM_PREVIOUS:
1325 encode_claim_previous(xdr, arg->u.delegation_type);
1326 break;
1327 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1328 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1329 break;
1330 default:
1331 BUG();
1332 }
1333 hdr->nops++;
1334 hdr->replen += decode_open_maxsz;
1335 }
1336
1337 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1338 {
1339 __be32 *p;
1340
1341 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1342 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1343 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1344 *p = cpu_to_be32(arg->seqid->sequence->counter);
1345 hdr->nops++;
1346 hdr->replen += decode_open_confirm_maxsz;
1347 }
1348
1349 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1350 {
1351 __be32 *p;
1352
1353 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1354 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1355 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1356 *p = cpu_to_be32(arg->seqid->sequence->counter);
1357 encode_share_access(xdr, arg->fmode);
1358 hdr->nops++;
1359 hdr->replen += decode_open_downgrade_maxsz;
1360 }
1361
1362 static void
1363 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1364 {
1365 int len = fh->size;
1366 __be32 *p;
1367
1368 p = reserve_space(xdr, 8 + len);
1369 *p++ = cpu_to_be32(OP_PUTFH);
1370 xdr_encode_opaque(p, fh->data, len);
1371 hdr->nops++;
1372 hdr->replen += decode_putfh_maxsz;
1373 }
1374
1375 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1376 {
1377 __be32 *p;
1378
1379 p = reserve_space(xdr, 4);
1380 *p = cpu_to_be32(OP_PUTROOTFH);
1381 hdr->nops++;
1382 hdr->replen += decode_putrootfh_maxsz;
1383 }
1384
1385 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1386 {
1387 nfs4_stateid stateid;
1388 __be32 *p;
1389
1390 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1391 if (ctx->state != NULL) {
1392 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1393 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1394 } else
1395 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1396 }
1397
1398 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1399 {
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 *p = cpu_to_be32(OP_READ);
1404
1405 encode_stateid(xdr, args->context, args->lock_context);
1406
1407 p = reserve_space(xdr, 12);
1408 p = xdr_encode_hyper(p, args->offset);
1409 *p = cpu_to_be32(args->count);
1410 hdr->nops++;
1411 hdr->replen += decode_read_maxsz;
1412 }
1413
1414 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1415 {
1416 uint32_t attrs[2] = {0, 0};
1417 uint32_t dircount = readdir->count >> 1;
1418 __be32 *p;
1419
1420 if (readdir->plus) {
1421 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1422 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1423 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1424 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1425 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1426 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1427 dircount >>= 1;
1428 }
1429 attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1430 attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1431 /* Switch to mounted_on_fileid if the server supports it */
1432 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1433 attrs[0] &= ~FATTR4_WORD0_FILEID;
1434 else
1435 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1436
1437 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1438 *p++ = cpu_to_be32(OP_READDIR);
1439 p = xdr_encode_hyper(p, readdir->cookie);
1440 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1441 *p++ = cpu_to_be32(dircount);
1442 *p++ = cpu_to_be32(readdir->count);
1443 *p++ = cpu_to_be32(2);
1444
1445 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1446 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1447 hdr->nops++;
1448 hdr->replen += decode_readdir_maxsz;
1449 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1450 __func__,
1451 (unsigned long long)readdir->cookie,
1452 ((u32 *)readdir->verifier.data)[0],
1453 ((u32 *)readdir->verifier.data)[1],
1454 attrs[0] & readdir->bitmask[0],
1455 attrs[1] & readdir->bitmask[1]);
1456 }
1457
1458 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1459 {
1460 __be32 *p;
1461
1462 p = reserve_space(xdr, 4);
1463 *p = cpu_to_be32(OP_READLINK);
1464 hdr->nops++;
1465 hdr->replen += decode_readlink_maxsz;
1466 }
1467
1468 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1469 {
1470 __be32 *p;
1471
1472 p = reserve_space(xdr, 8 + name->len);
1473 *p++ = cpu_to_be32(OP_REMOVE);
1474 xdr_encode_opaque(p, name->name, name->len);
1475 hdr->nops++;
1476 hdr->replen += decode_remove_maxsz;
1477 }
1478
1479 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(OP_RENAME);
1485 encode_string(xdr, oldname->len, oldname->name);
1486 encode_string(xdr, newname->len, newname->name);
1487 hdr->nops++;
1488 hdr->replen += decode_rename_maxsz;
1489 }
1490
1491 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1492 {
1493 __be32 *p;
1494
1495 p = reserve_space(xdr, 12);
1496 *p++ = cpu_to_be32(OP_RENEW);
1497 xdr_encode_hyper(p, client_stateid->cl_clientid);
1498 hdr->nops++;
1499 hdr->replen += decode_renew_maxsz;
1500 }
1501
1502 static void
1503 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504 {
1505 __be32 *p;
1506
1507 p = reserve_space(xdr, 4);
1508 *p = cpu_to_be32(OP_RESTOREFH);
1509 hdr->nops++;
1510 hdr->replen += decode_restorefh_maxsz;
1511 }
1512
1513 static int
1514 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1515 {
1516 __be32 *p;
1517
1518 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1519 *p++ = cpu_to_be32(OP_SETATTR);
1520 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1521 p = reserve_space(xdr, 2*4);
1522 *p++ = cpu_to_be32(1);
1523 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1524 if (arg->acl_len % 4)
1525 return -EINVAL;
1526 p = reserve_space(xdr, 4);
1527 *p = cpu_to_be32(arg->acl_len);
1528 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1529 hdr->nops++;
1530 hdr->replen += decode_setacl_maxsz;
1531 return 0;
1532 }
1533
1534 static void
1535 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1536 {
1537 __be32 *p;
1538
1539 p = reserve_space(xdr, 4);
1540 *p = cpu_to_be32(OP_SAVEFH);
1541 hdr->nops++;
1542 hdr->replen += decode_savefh_maxsz;
1543 }
1544
1545 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1546 {
1547 __be32 *p;
1548
1549 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1550 *p++ = cpu_to_be32(OP_SETATTR);
1551 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1552 hdr->nops++;
1553 hdr->replen += decode_setattr_maxsz;
1554 encode_attrs(xdr, arg->iap, server);
1555 }
1556
1557 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1558 {
1559 __be32 *p;
1560
1561 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1562 *p++ = cpu_to_be32(OP_SETCLIENTID);
1563 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1564
1565 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1566 p = reserve_space(xdr, 4);
1567 *p = cpu_to_be32(setclientid->sc_prog);
1568 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1569 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1570 p = reserve_space(xdr, 4);
1571 *p = cpu_to_be32(setclientid->sc_cb_ident);
1572 hdr->nops++;
1573 hdr->replen += decode_setclientid_maxsz;
1574 }
1575
1576 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1577 {
1578 __be32 *p;
1579
1580 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1581 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1582 p = xdr_encode_hyper(p, arg->clientid);
1583 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1584 hdr->nops++;
1585 hdr->replen += decode_setclientid_confirm_maxsz;
1586 }
1587
1588 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1589 {
1590 __be32 *p;
1591
1592 p = reserve_space(xdr, 4);
1593 *p = cpu_to_be32(OP_WRITE);
1594
1595 encode_stateid(xdr, args->context, args->lock_context);
1596
1597 p = reserve_space(xdr, 16);
1598 p = xdr_encode_hyper(p, args->offset);
1599 *p++ = cpu_to_be32(args->stable);
1600 *p = cpu_to_be32(args->count);
1601
1602 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1603 hdr->nops++;
1604 hdr->replen += decode_write_maxsz;
1605 }
1606
1607 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1608 {
1609 __be32 *p;
1610
1611 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1612
1613 *p++ = cpu_to_be32(OP_DELEGRETURN);
1614 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1615 hdr->nops++;
1616 hdr->replen += decode_delegreturn_maxsz;
1617 }
1618
1619 #if defined(CONFIG_NFS_V4_1)
1620 /* NFSv4.1 operations */
1621 static void encode_exchange_id(struct xdr_stream *xdr,
1622 struct nfs41_exchange_id_args *args,
1623 struct compound_hdr *hdr)
1624 {
1625 __be32 *p;
1626
1627 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1628 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1629 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1630
1631 encode_string(xdr, args->id_len, args->id);
1632
1633 p = reserve_space(xdr, 12);
1634 *p++ = cpu_to_be32(args->flags);
1635 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1636 *p = cpu_to_be32(0); /* zero length implementation id array */
1637 hdr->nops++;
1638 hdr->replen += decode_exchange_id_maxsz;
1639 }
1640
1641 static void encode_create_session(struct xdr_stream *xdr,
1642 struct nfs41_create_session_args *args,
1643 struct compound_hdr *hdr)
1644 {
1645 __be32 *p;
1646 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1647 uint32_t len;
1648 struct nfs_client *clp = args->client;
1649 u32 max_resp_sz_cached;
1650
1651 /*
1652 * Assumes OPEN is the biggest non-idempotent compound.
1653 * 2 is the verifier.
1654 */
1655 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1656 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1657
1658 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1659 clp->cl_ipaddr);
1660
1661 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1662 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1663 p = xdr_encode_hyper(p, clp->cl_ex_clid);
1664 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1665 *p++ = cpu_to_be32(args->flags); /*flags */
1666
1667 /* Fore Channel */
1668 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1669 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1670 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1671 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1672 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1673 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1674 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1675
1676 /* Back Channel */
1677 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1678 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1679 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1680 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1681 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1682 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1683 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1684
1685 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1686 *p++ = cpu_to_be32(1);
1687 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1688
1689 /* authsys_parms rfc1831 */
1690 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1691 p = xdr_encode_opaque(p, machine_name, len);
1692 *p++ = cpu_to_be32(0); /* UID */
1693 *p++ = cpu_to_be32(0); /* GID */
1694 *p = cpu_to_be32(0); /* No more gids */
1695 hdr->nops++;
1696 hdr->replen += decode_create_session_maxsz;
1697 }
1698
1699 static void encode_destroy_session(struct xdr_stream *xdr,
1700 struct nfs4_session *session,
1701 struct compound_hdr *hdr)
1702 {
1703 __be32 *p;
1704 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1705 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1706 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1707 hdr->nops++;
1708 hdr->replen += decode_destroy_session_maxsz;
1709 }
1710
1711 static void encode_reclaim_complete(struct xdr_stream *xdr,
1712 struct nfs41_reclaim_complete_args *args,
1713 struct compound_hdr *hdr)
1714 {
1715 __be32 *p;
1716
1717 p = reserve_space(xdr, 8);
1718 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1719 *p++ = cpu_to_be32(args->one_fs);
1720 hdr->nops++;
1721 hdr->replen += decode_reclaim_complete_maxsz;
1722 }
1723 #endif /* CONFIG_NFS_V4_1 */
1724
1725 static void encode_sequence(struct xdr_stream *xdr,
1726 const struct nfs4_sequence_args *args,
1727 struct compound_hdr *hdr)
1728 {
1729 #if defined(CONFIG_NFS_V4_1)
1730 struct nfs4_session *session = args->sa_session;
1731 struct nfs4_slot_table *tp;
1732 struct nfs4_slot *slot;
1733 __be32 *p;
1734
1735 if (!session)
1736 return;
1737
1738 tp = &session->fc_slot_table;
1739
1740 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1741 slot = tp->slots + args->sa_slotid;
1742
1743 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1744 *p++ = cpu_to_be32(OP_SEQUENCE);
1745
1746 /*
1747 * Sessionid + seqid + slotid + max slotid + cache_this
1748 */
1749 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1750 "max_slotid=%d cache_this=%d\n",
1751 __func__,
1752 ((u32 *)session->sess_id.data)[0],
1753 ((u32 *)session->sess_id.data)[1],
1754 ((u32 *)session->sess_id.data)[2],
1755 ((u32 *)session->sess_id.data)[3],
1756 slot->seq_nr, args->sa_slotid,
1757 tp->highest_used_slotid, args->sa_cache_this);
1758 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1759 *p++ = cpu_to_be32(slot->seq_nr);
1760 *p++ = cpu_to_be32(args->sa_slotid);
1761 *p++ = cpu_to_be32(tp->highest_used_slotid);
1762 *p = cpu_to_be32(args->sa_cache_this);
1763 hdr->nops++;
1764 hdr->replen += decode_sequence_maxsz;
1765 #endif /* CONFIG_NFS_V4_1 */
1766 }
1767
1768 #ifdef CONFIG_NFS_V4_1
1769 static void
1770 encode_getdeviceinfo(struct xdr_stream *xdr,
1771 const struct nfs4_getdeviceinfo_args *args,
1772 struct compound_hdr *hdr)
1773 {
1774 __be32 *p;
1775
1776 p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1777 *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1778 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1779 NFS4_DEVICEID4_SIZE);
1780 *p++ = cpu_to_be32(args->pdev->layout_type);
1781 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1782 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1783 hdr->nops++;
1784 hdr->replen += decode_getdeviceinfo_maxsz;
1785 }
1786
1787 static void
1788 encode_layoutget(struct xdr_stream *xdr,
1789 const struct nfs4_layoutget_args *args,
1790 struct compound_hdr *hdr)
1791 {
1792 nfs4_stateid stateid;
1793 __be32 *p;
1794
1795 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1796 *p++ = cpu_to_be32(OP_LAYOUTGET);
1797 *p++ = cpu_to_be32(0); /* Signal layout available */
1798 *p++ = cpu_to_be32(args->type);
1799 *p++ = cpu_to_be32(args->range.iomode);
1800 p = xdr_encode_hyper(p, args->range.offset);
1801 p = xdr_encode_hyper(p, args->range.length);
1802 p = xdr_encode_hyper(p, args->minlength);
1803 pnfs_get_layout_stateid(&stateid, NFS_I(args->inode)->layout,
1804 args->ctx->state);
1805 p = xdr_encode_opaque_fixed(p, &stateid.data, NFS4_STATEID_SIZE);
1806 *p = cpu_to_be32(args->maxcount);
1807
1808 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1809 __func__,
1810 args->type,
1811 args->range.iomode,
1812 (unsigned long)args->range.offset,
1813 (unsigned long)args->range.length,
1814 args->maxcount);
1815 hdr->nops++;
1816 hdr->replen += decode_layoutget_maxsz;
1817 }
1818 #endif /* CONFIG_NFS_V4_1 */
1819
1820 /*
1821 * END OF "GENERIC" ENCODE ROUTINES.
1822 */
1823
1824 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1825 {
1826 #if defined(CONFIG_NFS_V4_1)
1827 if (args->sa_session)
1828 return args->sa_session->clp->cl_mvops->minor_version;
1829 #endif /* CONFIG_NFS_V4_1 */
1830 return 0;
1831 }
1832
1833 /*
1834 * Encode an ACCESS request
1835 */
1836 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1837 {
1838 struct xdr_stream xdr;
1839 struct compound_hdr hdr = {
1840 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1841 };
1842
1843 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844 encode_compound_hdr(&xdr, req, &hdr);
1845 encode_sequence(&xdr, &args->seq_args, &hdr);
1846 encode_putfh(&xdr, args->fh, &hdr);
1847 encode_access(&xdr, args->access, &hdr);
1848 encode_getfattr(&xdr, args->bitmask, &hdr);
1849 encode_nops(&hdr);
1850 return 0;
1851 }
1852
1853 /*
1854 * Encode LOOKUP request
1855 */
1856 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1857 {
1858 struct xdr_stream xdr;
1859 struct compound_hdr hdr = {
1860 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1861 };
1862
1863 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1864 encode_compound_hdr(&xdr, req, &hdr);
1865 encode_sequence(&xdr, &args->seq_args, &hdr);
1866 encode_putfh(&xdr, args->dir_fh, &hdr);
1867 encode_lookup(&xdr, args->name, &hdr);
1868 encode_getfh(&xdr, &hdr);
1869 encode_getfattr(&xdr, args->bitmask, &hdr);
1870 encode_nops(&hdr);
1871 return 0;
1872 }
1873
1874 /*
1875 * Encode LOOKUP_ROOT request
1876 */
1877 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1878 {
1879 struct xdr_stream xdr;
1880 struct compound_hdr hdr = {
1881 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1882 };
1883
1884 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1885 encode_compound_hdr(&xdr, req, &hdr);
1886 encode_sequence(&xdr, &args->seq_args, &hdr);
1887 encode_putrootfh(&xdr, &hdr);
1888 encode_getfh(&xdr, &hdr);
1889 encode_getfattr(&xdr, args->bitmask, &hdr);
1890 encode_nops(&hdr);
1891 return 0;
1892 }
1893
1894 /*
1895 * Encode REMOVE request
1896 */
1897 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1898 {
1899 struct xdr_stream xdr;
1900 struct compound_hdr hdr = {
1901 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1902 };
1903
1904 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1905 encode_compound_hdr(&xdr, req, &hdr);
1906 encode_sequence(&xdr, &args->seq_args, &hdr);
1907 encode_putfh(&xdr, args->fh, &hdr);
1908 encode_remove(&xdr, &args->name, &hdr);
1909 encode_getfattr(&xdr, args->bitmask, &hdr);
1910 encode_nops(&hdr);
1911 return 0;
1912 }
1913
1914 /*
1915 * Encode RENAME request
1916 */
1917 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
1918 {
1919 struct xdr_stream xdr;
1920 struct compound_hdr hdr = {
1921 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1922 };
1923
1924 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1925 encode_compound_hdr(&xdr, req, &hdr);
1926 encode_sequence(&xdr, &args->seq_args, &hdr);
1927 encode_putfh(&xdr, args->old_dir, &hdr);
1928 encode_savefh(&xdr, &hdr);
1929 encode_putfh(&xdr, args->new_dir, &hdr);
1930 encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1931 encode_getfattr(&xdr, args->bitmask, &hdr);
1932 encode_restorefh(&xdr, &hdr);
1933 encode_getfattr(&xdr, args->bitmask, &hdr);
1934 encode_nops(&hdr);
1935 return 0;
1936 }
1937
1938 /*
1939 * Encode LINK request
1940 */
1941 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1942 {
1943 struct xdr_stream xdr;
1944 struct compound_hdr hdr = {
1945 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1946 };
1947
1948 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949 encode_compound_hdr(&xdr, req, &hdr);
1950 encode_sequence(&xdr, &args->seq_args, &hdr);
1951 encode_putfh(&xdr, args->fh, &hdr);
1952 encode_savefh(&xdr, &hdr);
1953 encode_putfh(&xdr, args->dir_fh, &hdr);
1954 encode_link(&xdr, args->name, &hdr);
1955 encode_getfattr(&xdr, args->bitmask, &hdr);
1956 encode_restorefh(&xdr, &hdr);
1957 encode_getfattr(&xdr, args->bitmask, &hdr);
1958 encode_nops(&hdr);
1959 return 0;
1960 }
1961
1962 /*
1963 * Encode CREATE request
1964 */
1965 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1966 {
1967 struct xdr_stream xdr;
1968 struct compound_hdr hdr = {
1969 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1970 };
1971
1972 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1973 encode_compound_hdr(&xdr, req, &hdr);
1974 encode_sequence(&xdr, &args->seq_args, &hdr);
1975 encode_putfh(&xdr, args->dir_fh, &hdr);
1976 encode_savefh(&xdr, &hdr);
1977 encode_create(&xdr, args, &hdr);
1978 encode_getfh(&xdr, &hdr);
1979 encode_getfattr(&xdr, args->bitmask, &hdr);
1980 encode_restorefh(&xdr, &hdr);
1981 encode_getfattr(&xdr, args->bitmask, &hdr);
1982 encode_nops(&hdr);
1983 return 0;
1984 }
1985
1986 /*
1987 * Encode SYMLINK request
1988 */
1989 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1990 {
1991 return nfs4_xdr_enc_create(req, p, args);
1992 }
1993
1994 /*
1995 * Encode GETATTR request
1996 */
1997 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1998 {
1999 struct xdr_stream xdr;
2000 struct compound_hdr hdr = {
2001 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2002 };
2003
2004 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2005 encode_compound_hdr(&xdr, req, &hdr);
2006 encode_sequence(&xdr, &args->seq_args, &hdr);
2007 encode_putfh(&xdr, args->fh, &hdr);
2008 encode_getfattr(&xdr, args->bitmask, &hdr);
2009 encode_nops(&hdr);
2010 return 0;
2011 }
2012
2013 /*
2014 * Encode a CLOSE request
2015 */
2016 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
2017 {
2018 struct xdr_stream xdr;
2019 struct compound_hdr hdr = {
2020 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2021 };
2022
2023 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2024 encode_compound_hdr(&xdr, req, &hdr);
2025 encode_sequence(&xdr, &args->seq_args, &hdr);
2026 encode_putfh(&xdr, args->fh, &hdr);
2027 encode_close(&xdr, args, &hdr);
2028 encode_getfattr(&xdr, args->bitmask, &hdr);
2029 encode_nops(&hdr);
2030 return 0;
2031 }
2032
2033 /*
2034 * Encode an OPEN request
2035 */
2036 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
2037 {
2038 struct xdr_stream xdr;
2039 struct compound_hdr hdr = {
2040 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2041 };
2042
2043 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2044 encode_compound_hdr(&xdr, req, &hdr);
2045 encode_sequence(&xdr, &args->seq_args, &hdr);
2046 encode_putfh(&xdr, args->fh, &hdr);
2047 encode_savefh(&xdr, &hdr);
2048 encode_open(&xdr, args, &hdr);
2049 encode_getfh(&xdr, &hdr);
2050 encode_getfattr(&xdr, args->bitmask, &hdr);
2051 encode_restorefh(&xdr, &hdr);
2052 encode_getfattr(&xdr, args->bitmask, &hdr);
2053 encode_nops(&hdr);
2054 return 0;
2055 }
2056
2057 /*
2058 * Encode an OPEN_CONFIRM request
2059 */
2060 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
2061 {
2062 struct xdr_stream xdr;
2063 struct compound_hdr hdr = {
2064 .nops = 0,
2065 };
2066
2067 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2068 encode_compound_hdr(&xdr, req, &hdr);
2069 encode_putfh(&xdr, args->fh, &hdr);
2070 encode_open_confirm(&xdr, args, &hdr);
2071 encode_nops(&hdr);
2072 return 0;
2073 }
2074
2075 /*
2076 * Encode an OPEN request with no attributes.
2077 */
2078 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
2079 {
2080 struct xdr_stream xdr;
2081 struct compound_hdr hdr = {
2082 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2083 };
2084
2085 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2086 encode_compound_hdr(&xdr, req, &hdr);
2087 encode_sequence(&xdr, &args->seq_args, &hdr);
2088 encode_putfh(&xdr, args->fh, &hdr);
2089 encode_open(&xdr, args, &hdr);
2090 encode_getfattr(&xdr, args->bitmask, &hdr);
2091 encode_nops(&hdr);
2092 return 0;
2093 }
2094
2095 /*
2096 * Encode an OPEN_DOWNGRADE request
2097 */
2098 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
2099 {
2100 struct xdr_stream xdr;
2101 struct compound_hdr hdr = {
2102 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2103 };
2104
2105 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2106 encode_compound_hdr(&xdr, req, &hdr);
2107 encode_sequence(&xdr, &args->seq_args, &hdr);
2108 encode_putfh(&xdr, args->fh, &hdr);
2109 encode_open_downgrade(&xdr, args, &hdr);
2110 encode_getfattr(&xdr, args->bitmask, &hdr);
2111 encode_nops(&hdr);
2112 return 0;
2113 }
2114
2115 /*
2116 * Encode a LOCK request
2117 */
2118 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
2119 {
2120 struct xdr_stream xdr;
2121 struct compound_hdr hdr = {
2122 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123 };
2124
2125 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2126 encode_compound_hdr(&xdr, req, &hdr);
2127 encode_sequence(&xdr, &args->seq_args, &hdr);
2128 encode_putfh(&xdr, args->fh, &hdr);
2129 encode_lock(&xdr, args, &hdr);
2130 encode_nops(&hdr);
2131 return 0;
2132 }
2133
2134 /*
2135 * Encode a LOCKT request
2136 */
2137 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2138 {
2139 struct xdr_stream xdr;
2140 struct compound_hdr hdr = {
2141 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2142 };
2143
2144 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2145 encode_compound_hdr(&xdr, req, &hdr);
2146 encode_sequence(&xdr, &args->seq_args, &hdr);
2147 encode_putfh(&xdr, args->fh, &hdr);
2148 encode_lockt(&xdr, args, &hdr);
2149 encode_nops(&hdr);
2150 return 0;
2151 }
2152
2153 /*
2154 * Encode a LOCKU request
2155 */
2156 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2157 {
2158 struct xdr_stream xdr;
2159 struct compound_hdr hdr = {
2160 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2161 };
2162
2163 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2164 encode_compound_hdr(&xdr, req, &hdr);
2165 encode_sequence(&xdr, &args->seq_args, &hdr);
2166 encode_putfh(&xdr, args->fh, &hdr);
2167 encode_locku(&xdr, args, &hdr);
2168 encode_nops(&hdr);
2169 return 0;
2170 }
2171
2172 static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
2173 {
2174 struct xdr_stream xdr;
2175 struct compound_hdr hdr = {
2176 .minorversion = 0,
2177 };
2178
2179 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2180 encode_compound_hdr(&xdr, req, &hdr);
2181 encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
2182 encode_nops(&hdr);
2183 return 0;
2184 }
2185
2186 /*
2187 * Encode a READLINK request
2188 */
2189 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2190 {
2191 struct xdr_stream xdr;
2192 struct compound_hdr hdr = {
2193 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2194 };
2195
2196 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2197 encode_compound_hdr(&xdr, req, &hdr);
2198 encode_sequence(&xdr, &args->seq_args, &hdr);
2199 encode_putfh(&xdr, args->fh, &hdr);
2200 encode_readlink(&xdr, args, req, &hdr);
2201
2202 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2203 args->pgbase, args->pglen);
2204 encode_nops(&hdr);
2205 return 0;
2206 }
2207
2208 /*
2209 * Encode a READDIR request
2210 */
2211 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2212 {
2213 struct xdr_stream xdr;
2214 struct compound_hdr hdr = {
2215 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2216 };
2217
2218 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2219 encode_compound_hdr(&xdr, req, &hdr);
2220 encode_sequence(&xdr, &args->seq_args, &hdr);
2221 encode_putfh(&xdr, args->fh, &hdr);
2222 encode_readdir(&xdr, args, req, &hdr);
2223
2224 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2225 args->pgbase, args->count);
2226 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2227 __func__, hdr.replen << 2, args->pages,
2228 args->pgbase, args->count);
2229 encode_nops(&hdr);
2230 return 0;
2231 }
2232
2233 /*
2234 * Encode a READ request
2235 */
2236 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2237 {
2238 struct xdr_stream xdr;
2239 struct compound_hdr hdr = {
2240 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241 };
2242
2243 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2244 encode_compound_hdr(&xdr, req, &hdr);
2245 encode_sequence(&xdr, &args->seq_args, &hdr);
2246 encode_putfh(&xdr, args->fh, &hdr);
2247 encode_read(&xdr, args, &hdr);
2248
2249 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2250 args->pages, args->pgbase, args->count);
2251 req->rq_rcv_buf.flags |= XDRBUF_READ;
2252 encode_nops(&hdr);
2253 return 0;
2254 }
2255
2256 /*
2257 * Encode an SETATTR request
2258 */
2259 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2260 {
2261 struct xdr_stream xdr;
2262 struct compound_hdr hdr = {
2263 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2264 };
2265
2266 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2267 encode_compound_hdr(&xdr, req, &hdr);
2268 encode_sequence(&xdr, &args->seq_args, &hdr);
2269 encode_putfh(&xdr, args->fh, &hdr);
2270 encode_setattr(&xdr, args, args->server, &hdr);
2271 encode_getfattr(&xdr, args->bitmask, &hdr);
2272 encode_nops(&hdr);
2273 return 0;
2274 }
2275
2276 /*
2277 * Encode a GETACL request
2278 */
2279 static int
2280 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2281 struct nfs_getaclargs *args)
2282 {
2283 struct xdr_stream xdr;
2284 struct compound_hdr hdr = {
2285 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286 };
2287 uint32_t replen;
2288
2289 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2290 encode_compound_hdr(&xdr, req, &hdr);
2291 encode_sequence(&xdr, &args->seq_args, &hdr);
2292 encode_putfh(&xdr, args->fh, &hdr);
2293 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2294 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2295
2296 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2297 args->acl_pages, args->acl_pgbase, args->acl_len);
2298 encode_nops(&hdr);
2299 return 0;
2300 }
2301
2302 /*
2303 * Encode a WRITE request
2304 */
2305 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2306 {
2307 struct xdr_stream xdr;
2308 struct compound_hdr hdr = {
2309 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2310 };
2311
2312 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2313 encode_compound_hdr(&xdr, req, &hdr);
2314 encode_sequence(&xdr, &args->seq_args, &hdr);
2315 encode_putfh(&xdr, args->fh, &hdr);
2316 encode_write(&xdr, args, &hdr);
2317 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2318 encode_getfattr(&xdr, args->bitmask, &hdr);
2319 encode_nops(&hdr);
2320 return 0;
2321 }
2322
2323 /*
2324 * a COMMIT request
2325 */
2326 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2327 {
2328 struct xdr_stream xdr;
2329 struct compound_hdr hdr = {
2330 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331 };
2332
2333 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2334 encode_compound_hdr(&xdr, req, &hdr);
2335 encode_sequence(&xdr, &args->seq_args, &hdr);
2336 encode_putfh(&xdr, args->fh, &hdr);
2337 encode_commit(&xdr, args, &hdr);
2338 encode_getfattr(&xdr, args->bitmask, &hdr);
2339 encode_nops(&hdr);
2340 return 0;
2341 }
2342
2343 /*
2344 * FSINFO request
2345 */
2346 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2347 {
2348 struct xdr_stream xdr;
2349 struct compound_hdr hdr = {
2350 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351 };
2352
2353 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2354 encode_compound_hdr(&xdr, req, &hdr);
2355 encode_sequence(&xdr, &args->seq_args, &hdr);
2356 encode_putfh(&xdr, args->fh, &hdr);
2357 encode_fsinfo(&xdr, args->bitmask, &hdr);
2358 encode_nops(&hdr);
2359 return 0;
2360 }
2361
2362 /*
2363 * a PATHCONF request
2364 */
2365 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2366 {
2367 struct xdr_stream xdr;
2368 struct compound_hdr hdr = {
2369 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2370 };
2371
2372 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2373 encode_compound_hdr(&xdr, req, &hdr);
2374 encode_sequence(&xdr, &args->seq_args, &hdr);
2375 encode_putfh(&xdr, args->fh, &hdr);
2376 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2377 &hdr);
2378 encode_nops(&hdr);
2379 return 0;
2380 }
2381
2382 /*
2383 * a STATFS request
2384 */
2385 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2386 {
2387 struct xdr_stream xdr;
2388 struct compound_hdr hdr = {
2389 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2390 };
2391
2392 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2393 encode_compound_hdr(&xdr, req, &hdr);
2394 encode_sequence(&xdr, &args->seq_args, &hdr);
2395 encode_putfh(&xdr, args->fh, &hdr);
2396 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2397 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2398 encode_nops(&hdr);
2399 return 0;
2400 }
2401
2402 /*
2403 * GETATTR_BITMAP request
2404 */
2405 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2406 struct nfs4_server_caps_arg *args)
2407 {
2408 struct xdr_stream xdr;
2409 struct compound_hdr hdr = {
2410 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2411 };
2412
2413 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2414 encode_compound_hdr(&xdr, req, &hdr);
2415 encode_sequence(&xdr, &args->seq_args, &hdr);
2416 encode_putfh(&xdr, args->fhandle, &hdr);
2417 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2418 FATTR4_WORD0_LINK_SUPPORT|
2419 FATTR4_WORD0_SYMLINK_SUPPORT|
2420 FATTR4_WORD0_ACLSUPPORT, &hdr);
2421 encode_nops(&hdr);
2422 return 0;
2423 }
2424
2425 /*
2426 * a RENEW request
2427 */
2428 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2429 {
2430 struct xdr_stream xdr;
2431 struct compound_hdr hdr = {
2432 .nops = 0,
2433 };
2434
2435 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2436 encode_compound_hdr(&xdr, req, &hdr);
2437 encode_renew(&xdr, clp, &hdr);
2438 encode_nops(&hdr);
2439 return 0;
2440 }
2441
2442 /*
2443 * a SETCLIENTID request
2444 */
2445 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2446 {
2447 struct xdr_stream xdr;
2448 struct compound_hdr hdr = {
2449 .nops = 0,
2450 };
2451
2452 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2453 encode_compound_hdr(&xdr, req, &hdr);
2454 encode_setclientid(&xdr, sc, &hdr);
2455 encode_nops(&hdr);
2456 return 0;
2457 }
2458
2459 /*
2460 * a SETCLIENTID_CONFIRM request
2461 */
2462 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
2463 {
2464 struct xdr_stream xdr;
2465 struct compound_hdr hdr = {
2466 .nops = 0,
2467 };
2468 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2469
2470 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2471 encode_compound_hdr(&xdr, req, &hdr);
2472 encode_setclientid_confirm(&xdr, arg, &hdr);
2473 encode_putrootfh(&xdr, &hdr);
2474 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2475 encode_nops(&hdr);
2476 return 0;
2477 }
2478
2479 /*
2480 * DELEGRETURN request
2481 */
2482 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2483 {
2484 struct xdr_stream xdr;
2485 struct compound_hdr hdr = {
2486 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2487 };
2488
2489 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2490 encode_compound_hdr(&xdr, req, &hdr);
2491 encode_sequence(&xdr, &args->seq_args, &hdr);
2492 encode_putfh(&xdr, args->fhandle, &hdr);
2493 encode_delegreturn(&xdr, args->stateid, &hdr);
2494 encode_getfattr(&xdr, args->bitmask, &hdr);
2495 encode_nops(&hdr);
2496 return 0;
2497 }
2498
2499 /*
2500 * Encode FS_LOCATIONS request
2501 */
2502 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2503 {
2504 struct xdr_stream xdr;
2505 struct compound_hdr hdr = {
2506 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507 };
2508 uint32_t replen;
2509
2510 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2511 encode_compound_hdr(&xdr, req, &hdr);
2512 encode_sequence(&xdr, &args->seq_args, &hdr);
2513 encode_putfh(&xdr, args->dir_fh, &hdr);
2514 encode_lookup(&xdr, args->name, &hdr);
2515 replen = hdr.replen; /* get the attribute into args->page */
2516 encode_fs_locations(&xdr, args->bitmask, &hdr);
2517
2518 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2519 0, PAGE_SIZE);
2520 encode_nops(&hdr);
2521 return 0;
2522 }
2523
2524 #if defined(CONFIG_NFS_V4_1)
2525 /*
2526 * EXCHANGE_ID request
2527 */
2528 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2529 struct nfs41_exchange_id_args *args)
2530 {
2531 struct xdr_stream xdr;
2532 struct compound_hdr hdr = {
2533 .minorversion = args->client->cl_mvops->minor_version,
2534 };
2535
2536 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2537 encode_compound_hdr(&xdr, req, &hdr);
2538 encode_exchange_id(&xdr, args, &hdr);
2539 encode_nops(&hdr);
2540 return 0;
2541 }
2542
2543 /*
2544 * a CREATE_SESSION request
2545 */
2546 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2547 struct nfs41_create_session_args *args)
2548 {
2549 struct xdr_stream xdr;
2550 struct compound_hdr hdr = {
2551 .minorversion = args->client->cl_mvops->minor_version,
2552 };
2553
2554 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2555 encode_compound_hdr(&xdr, req, &hdr);
2556 encode_create_session(&xdr, args, &hdr);
2557 encode_nops(&hdr);
2558 return 0;
2559 }
2560
2561 /*
2562 * a DESTROY_SESSION request
2563 */
2564 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2565 struct nfs4_session *session)
2566 {
2567 struct xdr_stream xdr;
2568 struct compound_hdr hdr = {
2569 .minorversion = session->clp->cl_mvops->minor_version,
2570 };
2571
2572 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2573 encode_compound_hdr(&xdr, req, &hdr);
2574 encode_destroy_session(&xdr, session, &hdr);
2575 encode_nops(&hdr);
2576 return 0;
2577 }
2578
2579 /*
2580 * a SEQUENCE request
2581 */
2582 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2583 struct nfs4_sequence_args *args)
2584 {
2585 struct xdr_stream xdr;
2586 struct compound_hdr hdr = {
2587 .minorversion = nfs4_xdr_minorversion(args),
2588 };
2589
2590 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2591 encode_compound_hdr(&xdr, req, &hdr);
2592 encode_sequence(&xdr, args, &hdr);
2593 encode_nops(&hdr);
2594 return 0;
2595 }
2596
2597 /*
2598 * a GET_LEASE_TIME request
2599 */
2600 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2601 struct nfs4_get_lease_time_args *args)
2602 {
2603 struct xdr_stream xdr;
2604 struct compound_hdr hdr = {
2605 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2606 };
2607 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2608
2609 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2610 encode_compound_hdr(&xdr, req, &hdr);
2611 encode_sequence(&xdr, &args->la_seq_args, &hdr);
2612 encode_putrootfh(&xdr, &hdr);
2613 encode_fsinfo(&xdr, lease_bitmap, &hdr);
2614 encode_nops(&hdr);
2615 return 0;
2616 }
2617
2618 /*
2619 * a RECLAIM_COMPLETE request
2620 */
2621 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2622 struct nfs41_reclaim_complete_args *args)
2623 {
2624 struct xdr_stream xdr;
2625 struct compound_hdr hdr = {
2626 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2627 };
2628
2629 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2630 encode_compound_hdr(&xdr, req, &hdr);
2631 encode_sequence(&xdr, &args->seq_args, &hdr);
2632 encode_reclaim_complete(&xdr, args, &hdr);
2633 encode_nops(&hdr);
2634 return 0;
2635 }
2636
2637 /*
2638 * Encode GETDEVICEINFO request
2639 */
2640 static int nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, uint32_t *p,
2641 struct nfs4_getdeviceinfo_args *args)
2642 {
2643 struct xdr_stream xdr;
2644 struct compound_hdr hdr = {
2645 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2646 };
2647
2648 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2649 encode_compound_hdr(&xdr, req, &hdr);
2650 encode_sequence(&xdr, &args->seq_args, &hdr);
2651 encode_getdeviceinfo(&xdr, args, &hdr);
2652
2653 /* set up reply kvec. Subtract notification bitmap max size (2)
2654 * so that notification bitmap is put in xdr_buf tail */
2655 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2656 args->pdev->pages, args->pdev->pgbase,
2657 args->pdev->pglen);
2658
2659 encode_nops(&hdr);
2660 return 0;
2661 }
2662
2663 /*
2664 * Encode LAYOUTGET request
2665 */
2666 static int nfs4_xdr_enc_layoutget(struct rpc_rqst *req, uint32_t *p,
2667 struct nfs4_layoutget_args *args)
2668 {
2669 struct xdr_stream xdr;
2670 struct compound_hdr hdr = {
2671 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2672 };
2673
2674 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2675 encode_compound_hdr(&xdr, req, &hdr);
2676 encode_sequence(&xdr, &args->seq_args, &hdr);
2677 encode_putfh(&xdr, NFS_FH(args->inode), &hdr);
2678 encode_layoutget(&xdr, args, &hdr);
2679 encode_nops(&hdr);
2680 return 0;
2681 }
2682 #endif /* CONFIG_NFS_V4_1 */
2683
2684 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2685 {
2686 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2687 "Remaining buffer length is %tu words.\n",
2688 func, xdr->end - xdr->p);
2689 }
2690
2691 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2692 {
2693 __be32 *p;
2694
2695 p = xdr_inline_decode(xdr, 4);
2696 if (unlikely(!p))
2697 goto out_overflow;
2698 *len = be32_to_cpup(p);
2699 p = xdr_inline_decode(xdr, *len);
2700 if (unlikely(!p))
2701 goto out_overflow;
2702 *string = (char *)p;
2703 return 0;
2704 out_overflow:
2705 print_overflow_msg(__func__, xdr);
2706 return -EIO;
2707 }
2708
2709 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2710 {
2711 __be32 *p;
2712
2713 p = xdr_inline_decode(xdr, 8);
2714 if (unlikely(!p))
2715 goto out_overflow;
2716 hdr->status = be32_to_cpup(p++);
2717 hdr->taglen = be32_to_cpup(p);
2718
2719 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2720 if (unlikely(!p))
2721 goto out_overflow;
2722 hdr->tag = (char *)p;
2723 p += XDR_QUADLEN(hdr->taglen);
2724 hdr->nops = be32_to_cpup(p);
2725 if (unlikely(hdr->nops < 1))
2726 return nfs4_stat_to_errno(hdr->status);
2727 return 0;
2728 out_overflow:
2729 print_overflow_msg(__func__, xdr);
2730 return -EIO;
2731 }
2732
2733 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2734 {
2735 __be32 *p;
2736 uint32_t opnum;
2737 int32_t nfserr;
2738
2739 p = xdr_inline_decode(xdr, 8);
2740 if (unlikely(!p))
2741 goto out_overflow;
2742 opnum = be32_to_cpup(p++);
2743 if (opnum != expected) {
2744 dprintk("nfs: Server returned operation"
2745 " %d but we issued a request for %d\n",
2746 opnum, expected);
2747 return -EIO;
2748 }
2749 nfserr = be32_to_cpup(p);
2750 if (nfserr != NFS_OK)
2751 return nfs4_stat_to_errno(nfserr);
2752 return 0;
2753 out_overflow:
2754 print_overflow_msg(__func__, xdr);
2755 return -EIO;
2756 }
2757
2758 /* Dummy routine */
2759 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2760 {
2761 __be32 *p;
2762 unsigned int strlen;
2763 char *str;
2764
2765 p = xdr_inline_decode(xdr, 12);
2766 if (likely(p))
2767 return decode_opaque_inline(xdr, &strlen, &str);
2768 print_overflow_msg(__func__, xdr);
2769 return -EIO;
2770 }
2771
2772 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2773 {
2774 uint32_t bmlen;
2775 __be32 *p;
2776
2777 p = xdr_inline_decode(xdr, 4);
2778 if (unlikely(!p))
2779 goto out_overflow;
2780 bmlen = be32_to_cpup(p);
2781
2782 bitmap[0] = bitmap[1] = 0;
2783 p = xdr_inline_decode(xdr, (bmlen << 2));
2784 if (unlikely(!p))
2785 goto out_overflow;
2786 if (bmlen > 0) {
2787 bitmap[0] = be32_to_cpup(p++);
2788 if (bmlen > 1)
2789 bitmap[1] = be32_to_cpup(p);
2790 }
2791 return 0;
2792 out_overflow:
2793 print_overflow_msg(__func__, xdr);
2794 return -EIO;
2795 }
2796
2797 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2798 {
2799 __be32 *p;
2800
2801 p = xdr_inline_decode(xdr, 4);
2802 if (unlikely(!p))
2803 goto out_overflow;
2804 *attrlen = be32_to_cpup(p);
2805 *savep = xdr->p;
2806 return 0;
2807 out_overflow:
2808 print_overflow_msg(__func__, xdr);
2809 return -EIO;
2810 }
2811
2812 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2813 {
2814 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2815 int ret;
2816 ret = decode_attr_bitmap(xdr, bitmask);
2817 if (unlikely(ret < 0))
2818 return ret;
2819 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2820 } else
2821 bitmask[0] = bitmask[1] = 0;
2822 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2823 return 0;
2824 }
2825
2826 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2827 {
2828 __be32 *p;
2829 int ret = 0;
2830
2831 *type = 0;
2832 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2833 return -EIO;
2834 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2835 p = xdr_inline_decode(xdr, 4);
2836 if (unlikely(!p))
2837 goto out_overflow;
2838 *type = be32_to_cpup(p);
2839 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2840 dprintk("%s: bad type %d\n", __func__, *type);
2841 return -EIO;
2842 }
2843 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2844 ret = NFS_ATTR_FATTR_TYPE;
2845 }
2846 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2847 return ret;
2848 out_overflow:
2849 print_overflow_msg(__func__, xdr);
2850 return -EIO;
2851 }
2852
2853 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2854 {
2855 __be32 *p;
2856 int ret = 0;
2857
2858 *change = 0;
2859 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2860 return -EIO;
2861 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2862 p = xdr_inline_decode(xdr, 8);
2863 if (unlikely(!p))
2864 goto out_overflow;
2865 xdr_decode_hyper(p, change);
2866 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2867 ret = NFS_ATTR_FATTR_CHANGE;
2868 }
2869 dprintk("%s: change attribute=%Lu\n", __func__,
2870 (unsigned long long)*change);
2871 return ret;
2872 out_overflow:
2873 print_overflow_msg(__func__, xdr);
2874 return -EIO;
2875 }
2876
2877 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2878 {
2879 __be32 *p;
2880 int ret = 0;
2881
2882 *size = 0;
2883 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2884 return -EIO;
2885 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2886 p = xdr_inline_decode(xdr, 8);
2887 if (unlikely(!p))
2888 goto out_overflow;
2889 xdr_decode_hyper(p, size);
2890 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2891 ret = NFS_ATTR_FATTR_SIZE;
2892 }
2893 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2894 return ret;
2895 out_overflow:
2896 print_overflow_msg(__func__, xdr);
2897 return -EIO;
2898 }
2899
2900 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2901 {
2902 __be32 *p;
2903
2904 *res = 0;
2905 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2906 return -EIO;
2907 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2908 p = xdr_inline_decode(xdr, 4);
2909 if (unlikely(!p))
2910 goto out_overflow;
2911 *res = be32_to_cpup(p);
2912 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2913 }
2914 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2915 return 0;
2916 out_overflow:
2917 print_overflow_msg(__func__, xdr);
2918 return -EIO;
2919 }
2920
2921 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2922 {
2923 __be32 *p;
2924
2925 *res = 0;
2926 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2927 return -EIO;
2928 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2929 p = xdr_inline_decode(xdr, 4);
2930 if (unlikely(!p))
2931 goto out_overflow;
2932 *res = be32_to_cpup(p);
2933 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2934 }
2935 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2936 return 0;
2937 out_overflow:
2938 print_overflow_msg(__func__, xdr);
2939 return -EIO;
2940 }
2941
2942 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2943 {
2944 __be32 *p;
2945 int ret = 0;
2946
2947 fsid->major = 0;
2948 fsid->minor = 0;
2949 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2950 return -EIO;
2951 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2952 p = xdr_inline_decode(xdr, 16);
2953 if (unlikely(!p))
2954 goto out_overflow;
2955 p = xdr_decode_hyper(p, &fsid->major);
2956 xdr_decode_hyper(p, &fsid->minor);
2957 bitmap[0] &= ~FATTR4_WORD0_FSID;
2958 ret = NFS_ATTR_FATTR_FSID;
2959 }
2960 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2961 (unsigned long long)fsid->major,
2962 (unsigned long long)fsid->minor);
2963 return ret;
2964 out_overflow:
2965 print_overflow_msg(__func__, xdr);
2966 return -EIO;
2967 }
2968
2969 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2970 {
2971 __be32 *p;
2972
2973 *res = 60;
2974 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2975 return -EIO;
2976 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2977 p = xdr_inline_decode(xdr, 4);
2978 if (unlikely(!p))
2979 goto out_overflow;
2980 *res = be32_to_cpup(p);
2981 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2982 }
2983 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2984 return 0;
2985 out_overflow:
2986 print_overflow_msg(__func__, xdr);
2987 return -EIO;
2988 }
2989
2990 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2991 {
2992 __be32 *p;
2993
2994 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2995 return -EIO;
2996 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2997 p = xdr_inline_decode(xdr, 4);
2998 if (unlikely(!p))
2999 goto out_overflow;
3000 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3001 }
3002 return 0;
3003 out_overflow:
3004 print_overflow_msg(__func__, xdr);
3005 return -EIO;
3006 }
3007
3008 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3009 {
3010 __be32 *p;
3011 int len;
3012
3013 if (fh != NULL)
3014 memset(fh, 0, sizeof(*fh));
3015
3016 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3017 return -EIO;
3018 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3019 p = xdr_inline_decode(xdr, 4);
3020 if (unlikely(!p))
3021 goto out_overflow;
3022 len = be32_to_cpup(p);
3023 if (len > NFS4_FHSIZE)
3024 return -EIO;
3025 p = xdr_inline_decode(xdr, len);
3026 if (unlikely(!p))
3027 goto out_overflow;
3028 if (fh != NULL) {
3029 memcpy(fh->data, p, len);
3030 fh->size = len;
3031 }
3032 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3033 }
3034 return 0;
3035 out_overflow:
3036 print_overflow_msg(__func__, xdr);
3037 return -EIO;
3038 }
3039
3040 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3041 {
3042 __be32 *p;
3043
3044 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3045 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3046 return -EIO;
3047 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3048 p = xdr_inline_decode(xdr, 4);
3049 if (unlikely(!p))
3050 goto out_overflow;
3051 *res = be32_to_cpup(p);
3052 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3053 }
3054 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3055 return 0;
3056 out_overflow:
3057 print_overflow_msg(__func__, xdr);
3058 return -EIO;
3059 }
3060
3061 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3062 {
3063 __be32 *p;
3064 int ret = 0;
3065
3066 *fileid = 0;
3067 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3068 return -EIO;
3069 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3070 p = xdr_inline_decode(xdr, 8);
3071 if (unlikely(!p))
3072 goto out_overflow;
3073 xdr_decode_hyper(p, fileid);
3074 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3075 ret = NFS_ATTR_FATTR_FILEID;
3076 }
3077 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3078 return ret;
3079 out_overflow:
3080 print_overflow_msg(__func__, xdr);
3081 return -EIO;
3082 }
3083
3084 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3085 {
3086 __be32 *p;
3087 int ret = 0;
3088
3089 *fileid = 0;
3090 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3091 return -EIO;
3092 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3093 p = xdr_inline_decode(xdr, 8);
3094 if (unlikely(!p))
3095 goto out_overflow;
3096 xdr_decode_hyper(p, fileid);
3097 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3098 ret = NFS_ATTR_FATTR_FILEID;
3099 }
3100 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3101 return ret;
3102 out_overflow:
3103 print_overflow_msg(__func__, xdr);
3104 return -EIO;
3105 }
3106
3107 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3108 {
3109 __be32 *p;
3110 int status = 0;
3111
3112 *res = 0;
3113 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3114 return -EIO;
3115 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3116 p = xdr_inline_decode(xdr, 8);
3117 if (unlikely(!p))
3118 goto out_overflow;
3119 xdr_decode_hyper(p, res);
3120 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3121 }
3122 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3123 return status;
3124 out_overflow:
3125 print_overflow_msg(__func__, xdr);
3126 return -EIO;
3127 }
3128
3129 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3130 {
3131 __be32 *p;
3132 int status = 0;
3133
3134 *res = 0;
3135 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3136 return -EIO;
3137 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3138 p = xdr_inline_decode(xdr, 8);
3139 if (unlikely(!p))
3140 goto out_overflow;
3141 xdr_decode_hyper(p, res);
3142 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3143 }
3144 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3145 return status;
3146 out_overflow:
3147 print_overflow_msg(__func__, xdr);
3148 return -EIO;
3149 }
3150
3151 static int decode_attr_files_total(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_TOTAL - 1U)))
3158 return -EIO;
3159 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
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_TOTAL;
3165 }
3166 dprintk("%s: files total=%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_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3174 {
3175 u32 n;
3176 __be32 *p;
3177 int status = 0;
3178
3179 p = xdr_inline_decode(xdr, 4);
3180 if (unlikely(!p))
3181 goto out_overflow;
3182 n = be32_to_cpup(p);
3183 if (n == 0)
3184 goto root_path;
3185 dprintk("path ");
3186 path->ncomponents = 0;
3187 while (path->ncomponents < n) {
3188 struct nfs4_string *component = &path->components[path->ncomponents];
3189 status = decode_opaque_inline(xdr, &component->len, &component->data);
3190 if (unlikely(status != 0))
3191 goto out_eio;
3192 if (path->ncomponents != n)
3193 dprintk("/");
3194 dprintk("%s", component->data);
3195 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3196 path->ncomponents++;
3197 else {
3198 dprintk("cannot parse %d components in path\n", n);
3199 goto out_eio;
3200 }
3201 }
3202 out:
3203 dprintk("\n");
3204 return status;
3205 root_path:
3206 /* a root pathname is sent as a zero component4 */
3207 path->ncomponents = 1;
3208 path->components[0].len=0;
3209 path->components[0].data=NULL;
3210 dprintk("path /\n");
3211 goto out;
3212 out_eio:
3213 dprintk(" status %d", status);
3214 status = -EIO;
3215 goto out;
3216 out_overflow:
3217 print_overflow_msg(__func__, xdr);
3218 return -EIO;
3219 }
3220
3221 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3222 {
3223 int n;
3224 __be32 *p;
3225 int status = -EIO;
3226
3227 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3228 goto out;
3229 status = 0;
3230 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3231 goto out;
3232 dprintk("%s: fsroot ", __func__);
3233 status = decode_pathname(xdr, &res->fs_path);
3234 if (unlikely(status != 0))
3235 goto out;
3236 p = xdr_inline_decode(xdr, 4);
3237 if (unlikely(!p))
3238 goto out_overflow;
3239 n = be32_to_cpup(p);
3240 if (n <= 0)
3241 goto out_eio;
3242 res->nlocations = 0;
3243 while (res->nlocations < n) {
3244 u32 m;
3245 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3246
3247 p = xdr_inline_decode(xdr, 4);
3248 if (unlikely(!p))
3249 goto out_overflow;
3250 m = be32_to_cpup(p);
3251
3252 loc->nservers = 0;
3253 dprintk("%s: servers ", __func__);
3254 while (loc->nservers < m) {
3255 struct nfs4_string *server = &loc->servers[loc->nservers];
3256 status = decode_opaque_inline(xdr, &server->len, &server->data);
3257 if (unlikely(status != 0))
3258 goto out_eio;
3259 dprintk("%s ", server->data);
3260 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3261 loc->nservers++;
3262 else {
3263 unsigned int i;
3264 dprintk("%s: using first %u of %u servers "
3265 "returned for location %u\n",
3266 __func__,
3267 NFS4_FS_LOCATION_MAXSERVERS,
3268 m, res->nlocations);
3269 for (i = loc->nservers; i < m; i++) {
3270 unsigned int len;
3271 char *data;
3272 status = decode_opaque_inline(xdr, &len, &data);
3273 if (unlikely(status != 0))
3274 goto out_eio;
3275 }
3276 }
3277 }
3278 status = decode_pathname(xdr, &loc->rootpath);
3279 if (unlikely(status != 0))
3280 goto out_eio;
3281 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3282 res->nlocations++;
3283 }
3284 if (res->nlocations != 0)
3285 status = NFS_ATTR_FATTR_V4_REFERRAL;
3286 out:
3287 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3288 return status;
3289 out_overflow:
3290 print_overflow_msg(__func__, xdr);
3291 out_eio:
3292 status = -EIO;
3293 goto out;
3294 }
3295
3296 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3297 {
3298 __be32 *p;
3299 int status = 0;
3300
3301 *res = 0;
3302 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3303 return -EIO;
3304 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3305 p = xdr_inline_decode(xdr, 8);
3306 if (unlikely(!p))
3307 goto out_overflow;
3308 xdr_decode_hyper(p, res);
3309 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3310 }
3311 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3312 return status;
3313 out_overflow:
3314 print_overflow_msg(__func__, xdr);
3315 return -EIO;
3316 }
3317
3318 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3319 {
3320 __be32 *p;
3321 int status = 0;
3322
3323 *maxlink = 1;
3324 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3325 return -EIO;
3326 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3327 p = xdr_inline_decode(xdr, 4);
3328 if (unlikely(!p))
3329 goto out_overflow;
3330 *maxlink = be32_to_cpup(p);
3331 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3332 }
3333 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3334 return status;
3335 out_overflow:
3336 print_overflow_msg(__func__, xdr);
3337 return -EIO;
3338 }
3339
3340 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3341 {
3342 __be32 *p;
3343 int status = 0;
3344
3345 *maxname = 1024;
3346 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3347 return -EIO;
3348 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3349 p = xdr_inline_decode(xdr, 4);
3350 if (unlikely(!p))
3351 goto out_overflow;
3352 *maxname = be32_to_cpup(p);
3353 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3354 }
3355 dprintk("%s: maxname=%u\n", __func__, *maxname);
3356 return status;
3357 out_overflow:
3358 print_overflow_msg(__func__, xdr);
3359 return -EIO;
3360 }
3361
3362 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3363 {
3364 __be32 *p;
3365 int status = 0;
3366
3367 *res = 1024;
3368 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3369 return -EIO;
3370 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3371 uint64_t maxread;
3372 p = xdr_inline_decode(xdr, 8);
3373 if (unlikely(!p))
3374 goto out_overflow;
3375 xdr_decode_hyper(p, &maxread);
3376 if (maxread > 0x7FFFFFFF)
3377 maxread = 0x7FFFFFFF;
3378 *res = (uint32_t)maxread;
3379 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3380 }
3381 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3382 return status;
3383 out_overflow:
3384 print_overflow_msg(__func__, xdr);
3385 return -EIO;
3386 }
3387
3388 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3389 {
3390 __be32 *p;
3391 int status = 0;
3392
3393 *res = 1024;
3394 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3395 return -EIO;
3396 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3397 uint64_t maxwrite;
3398 p = xdr_inline_decode(xdr, 8);
3399 if (unlikely(!p))
3400 goto out_overflow;
3401 xdr_decode_hyper(p, &maxwrite);
3402 if (maxwrite > 0x7FFFFFFF)
3403 maxwrite = 0x7FFFFFFF;
3404 *res = (uint32_t)maxwrite;
3405 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3406 }
3407 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3408 return status;
3409 out_overflow:
3410 print_overflow_msg(__func__, xdr);
3411 return -EIO;
3412 }
3413
3414 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3415 {
3416 uint32_t tmp;
3417 __be32 *p;
3418 int ret = 0;
3419
3420 *mode = 0;
3421 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3422 return -EIO;
3423 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3424 p = xdr_inline_decode(xdr, 4);
3425 if (unlikely(!p))
3426 goto out_overflow;
3427 tmp = be32_to_cpup(p);
3428 *mode = tmp & ~S_IFMT;
3429 bitmap[1] &= ~FATTR4_WORD1_MODE;
3430 ret = NFS_ATTR_FATTR_MODE;
3431 }
3432 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3433 return ret;
3434 out_overflow:
3435 print_overflow_msg(__func__, xdr);
3436 return -EIO;
3437 }
3438
3439 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3440 {
3441 __be32 *p;
3442 int ret = 0;
3443
3444 *nlink = 1;
3445 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3446 return -EIO;
3447 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3448 p = xdr_inline_decode(xdr, 4);
3449 if (unlikely(!p))
3450 goto out_overflow;
3451 *nlink = be32_to_cpup(p);
3452 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3453 ret = NFS_ATTR_FATTR_NLINK;
3454 }
3455 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3456 return ret;
3457 out_overflow:
3458 print_overflow_msg(__func__, xdr);
3459 return -EIO;
3460 }
3461
3462 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3463 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3464 {
3465 uint32_t len;
3466 __be32 *p;
3467 int ret = 0;
3468
3469 *uid = -2;
3470 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3471 return -EIO;
3472 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3473 p = xdr_inline_decode(xdr, 4);
3474 if (unlikely(!p))
3475 goto out_overflow;
3476 len = be32_to_cpup(p);
3477 p = xdr_inline_decode(xdr, len);
3478 if (unlikely(!p))
3479 goto out_overflow;
3480 if (!may_sleep) {
3481 /* do nothing */
3482 } else if (len < XDR_MAX_NETOBJ) {
3483 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3484 ret = NFS_ATTR_FATTR_OWNER;
3485 else
3486 dprintk("%s: nfs_map_name_to_uid failed!\n",
3487 __func__);
3488 } else
3489 dprintk("%s: name too long (%u)!\n",
3490 __func__, len);
3491 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3492 }
3493 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3494 return ret;
3495 out_overflow:
3496 print_overflow_msg(__func__, xdr);
3497 return -EIO;
3498 }
3499
3500 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3501 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3502 {
3503 uint32_t len;
3504 __be32 *p;
3505 int ret = 0;
3506
3507 *gid = -2;
3508 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3509 return -EIO;
3510 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3511 p = xdr_inline_decode(xdr, 4);
3512 if (unlikely(!p))
3513 goto out_overflow;
3514 len = be32_to_cpup(p);
3515 p = xdr_inline_decode(xdr, len);
3516 if (unlikely(!p))
3517 goto out_overflow;
3518 if (!may_sleep) {
3519 /* do nothing */
3520 } else if (len < XDR_MAX_NETOBJ) {
3521 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3522 ret = NFS_ATTR_FATTR_GROUP;
3523 else
3524 dprintk("%s: nfs_map_group_to_gid failed!\n",
3525 __func__);
3526 } else
3527 dprintk("%s: name too long (%u)!\n",
3528 __func__, len);
3529 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3530 }
3531 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3532 return ret;
3533 out_overflow:
3534 print_overflow_msg(__func__, xdr);
3535 return -EIO;
3536 }
3537
3538 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3539 {
3540 uint32_t major = 0, minor = 0;
3541 __be32 *p;
3542 int ret = 0;
3543
3544 *rdev = MKDEV(0,0);
3545 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3546 return -EIO;
3547 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3548 dev_t tmp;
3549
3550 p = xdr_inline_decode(xdr, 8);
3551 if (unlikely(!p))
3552 goto out_overflow;
3553 major = be32_to_cpup(p++);
3554 minor = be32_to_cpup(p);
3555 tmp = MKDEV(major, minor);
3556 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3557 *rdev = tmp;
3558 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3559 ret = NFS_ATTR_FATTR_RDEV;
3560 }
3561 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3562 return ret;
3563 out_overflow:
3564 print_overflow_msg(__func__, xdr);
3565 return -EIO;
3566 }
3567
3568 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3569 {
3570 __be32 *p;
3571 int status = 0;
3572
3573 *res = 0;
3574 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3575 return -EIO;
3576 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3577 p = xdr_inline_decode(xdr, 8);
3578 if (unlikely(!p))
3579 goto out_overflow;
3580 xdr_decode_hyper(p, res);
3581 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3582 }
3583 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3584 return status;
3585 out_overflow:
3586 print_overflow_msg(__func__, xdr);
3587 return -EIO;
3588 }
3589
3590 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3591 {
3592 __be32 *p;
3593 int status = 0;
3594
3595 *res = 0;
3596 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3597 return -EIO;
3598 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3599 p = xdr_inline_decode(xdr, 8);
3600 if (unlikely(!p))
3601 goto out_overflow;
3602 xdr_decode_hyper(p, res);
3603 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3604 }
3605 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3606 return status;
3607 out_overflow:
3608 print_overflow_msg(__func__, xdr);
3609 return -EIO;
3610 }
3611
3612 static int decode_attr_space_total(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_TOTAL - 1U)))
3619 return -EIO;
3620 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
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_TOTAL;
3626 }
3627 dprintk("%s: space total=%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_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3635 {
3636 __be32 *p;
3637 int ret = 0;
3638
3639 *used = 0;
3640 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3641 return -EIO;
3642 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3643 p = xdr_inline_decode(xdr, 8);
3644 if (unlikely(!p))
3645 goto out_overflow;
3646 xdr_decode_hyper(p, used);
3647 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3648 ret = NFS_ATTR_FATTR_SPACE_USED;
3649 }
3650 dprintk("%s: space used=%Lu\n", __func__,
3651 (unsigned long long)*used);
3652 return ret;
3653 out_overflow:
3654 print_overflow_msg(__func__, xdr);
3655 return -EIO;
3656 }
3657
3658 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3659 {
3660 __be32 *p;
3661 uint64_t sec;
3662 uint32_t nsec;
3663
3664 p = xdr_inline_decode(xdr, 12);
3665 if (unlikely(!p))
3666 goto out_overflow;
3667 p = xdr_decode_hyper(p, &sec);
3668 nsec = be32_to_cpup(p);
3669 time->tv_sec = (time_t)sec;
3670 time->tv_nsec = (long)nsec;
3671 return 0;
3672 out_overflow:
3673 print_overflow_msg(__func__, xdr);
3674 return -EIO;
3675 }
3676
3677 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3678 {
3679 int status = 0;
3680
3681 time->tv_sec = 0;
3682 time->tv_nsec = 0;
3683 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3684 return -EIO;
3685 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3686 status = decode_attr_time(xdr, time);
3687 if (status == 0)
3688 status = NFS_ATTR_FATTR_ATIME;
3689 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3690 }
3691 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3692 return status;
3693 }
3694
3695 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3696 {
3697 int status = 0;
3698
3699 time->tv_sec = 0;
3700 time->tv_nsec = 0;
3701 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3702 return -EIO;
3703 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3704 status = decode_attr_time(xdr, time);
3705 if (status == 0)
3706 status = NFS_ATTR_FATTR_CTIME;
3707 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3708 }
3709 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3710 return status;
3711 }
3712
3713 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3714 struct timespec *time)
3715 {
3716 int status = 0;
3717
3718 time->tv_sec = 0;
3719 time->tv_nsec = 0;
3720 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3721 return -EIO;
3722 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3723 status = decode_attr_time(xdr, time);
3724 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3725 }
3726 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3727 (long)time->tv_nsec);
3728 return status;
3729 }
3730
3731 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3732 {
3733 int status = 0;
3734
3735 time->tv_sec = 0;
3736 time->tv_nsec = 0;
3737 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3738 return -EIO;
3739 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3740 status = decode_attr_time(xdr, time);
3741 if (status == 0)
3742 status = NFS_ATTR_FATTR_MTIME;
3743 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3744 }
3745 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3746 return status;
3747 }
3748
3749 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3750 {
3751 unsigned int attrwords = XDR_QUADLEN(attrlen);
3752 unsigned int nwords = xdr->p - savep;
3753
3754 if (unlikely(attrwords != nwords)) {
3755 dprintk("%s: server returned incorrect attribute length: "
3756 "%u %c %u\n",
3757 __func__,
3758 attrwords << 2,
3759 (attrwords < nwords) ? '<' : '>',
3760 nwords << 2);
3761 return -EIO;
3762 }
3763 return 0;
3764 }
3765
3766 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3767 {
3768 __be32 *p;
3769
3770 p = xdr_inline_decode(xdr, 20);
3771 if (unlikely(!p))
3772 goto out_overflow;
3773 cinfo->atomic = be32_to_cpup(p++);
3774 p = xdr_decode_hyper(p, &cinfo->before);
3775 xdr_decode_hyper(p, &cinfo->after);
3776 return 0;
3777 out_overflow:
3778 print_overflow_msg(__func__, xdr);
3779 return -EIO;
3780 }
3781
3782 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3783 {
3784 __be32 *p;
3785 uint32_t supp, acc;
3786 int status;
3787
3788 status = decode_op_hdr(xdr, OP_ACCESS);
3789 if (status)
3790 return status;
3791 p = xdr_inline_decode(xdr, 8);
3792 if (unlikely(!p))
3793 goto out_overflow;
3794 supp = be32_to_cpup(p++);
3795 acc = be32_to_cpup(p);
3796 access->supported = supp;
3797 access->access = acc;
3798 return 0;
3799 out_overflow:
3800 print_overflow_msg(__func__, xdr);
3801 return -EIO;
3802 }
3803
3804 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3805 {
3806 __be32 *p;
3807
3808 p = xdr_inline_decode(xdr, len);
3809 if (likely(p)) {
3810 memcpy(buf, p, len);
3811 return 0;
3812 }
3813 print_overflow_msg(__func__, xdr);
3814 return -EIO;
3815 }
3816
3817 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3818 {
3819 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3820 }
3821
3822 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3823 {
3824 int status;
3825
3826 status = decode_op_hdr(xdr, OP_CLOSE);
3827 if (status != -EIO)
3828 nfs_increment_open_seqid(status, res->seqid);
3829 if (!status)
3830 status = decode_stateid(xdr, &res->stateid);
3831 return status;
3832 }
3833
3834 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3835 {
3836 return decode_opaque_fixed(xdr, verifier, 8);
3837 }
3838
3839 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3840 {
3841 int status;
3842
3843 status = decode_op_hdr(xdr, OP_COMMIT);
3844 if (!status)
3845 status = decode_verifier(xdr, res->verf->verifier);
3846 return status;
3847 }
3848
3849 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3850 {
3851 __be32 *p;
3852 uint32_t bmlen;
3853 int status;
3854
3855 status = decode_op_hdr(xdr, OP_CREATE);
3856 if (status)
3857 return status;
3858 if ((status = decode_change_info(xdr, cinfo)))
3859 return status;
3860 p = xdr_inline_decode(xdr, 4);
3861 if (unlikely(!p))
3862 goto out_overflow;
3863 bmlen = be32_to_cpup(p);
3864 p = xdr_inline_decode(xdr, bmlen << 2);
3865 if (likely(p))
3866 return 0;
3867 out_overflow:
3868 print_overflow_msg(__func__, xdr);
3869 return -EIO;
3870 }
3871
3872 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3873 {
3874 __be32 *savep;
3875 uint32_t attrlen, bitmap[2] = {0};
3876 int status;
3877
3878 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3879 goto xdr_error;
3880 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3881 goto xdr_error;
3882 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3883 goto xdr_error;
3884 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3885 goto xdr_error;
3886 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3887 goto xdr_error;
3888 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3889 goto xdr_error;
3890 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3891 goto xdr_error;
3892 status = verify_attr_len(xdr, savep, attrlen);
3893 xdr_error:
3894 dprintk("%s: xdr returned %d!\n", __func__, -status);
3895 return status;
3896 }
3897
3898 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3899 {
3900 __be32 *savep;
3901 uint32_t attrlen, bitmap[2] = {0};
3902 int status;
3903
3904 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3905 goto xdr_error;
3906 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3907 goto xdr_error;
3908 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3909 goto xdr_error;
3910
3911 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3912 goto xdr_error;
3913 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3914 goto xdr_error;
3915 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3916 goto xdr_error;
3917 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3918 goto xdr_error;
3919 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3920 goto xdr_error;
3921 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3922 goto xdr_error;
3923
3924 status = verify_attr_len(xdr, savep, attrlen);
3925 xdr_error:
3926 dprintk("%s: xdr returned %d!\n", __func__, -status);
3927 return status;
3928 }
3929
3930 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3931 {
3932 __be32 *savep;
3933 uint32_t attrlen, bitmap[2] = {0};
3934 int status;
3935
3936 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3937 goto xdr_error;
3938 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3939 goto xdr_error;
3940 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3941 goto xdr_error;
3942
3943 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3944 goto xdr_error;
3945 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3946 goto xdr_error;
3947
3948 status = verify_attr_len(xdr, savep, attrlen);
3949 xdr_error:
3950 dprintk("%s: xdr returned %d!\n", __func__, -status);
3951 return status;
3952 }
3953
3954 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3955 struct nfs_fattr *fattr, struct nfs_fh *fh,
3956 const struct nfs_server *server, int may_sleep)
3957 {
3958 int status;
3959 umode_t fmode = 0;
3960 uint64_t fileid;
3961 uint32_t type;
3962
3963 status = decode_attr_type(xdr, bitmap, &type);
3964 if (status < 0)
3965 goto xdr_error;
3966 fattr->mode = 0;
3967 if (status != 0) {
3968 fattr->mode |= nfs_type2fmt[type];
3969 fattr->valid |= status;
3970 }
3971
3972 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3973 if (status < 0)
3974 goto xdr_error;
3975 fattr->valid |= status;
3976
3977 status = decode_attr_size(xdr, bitmap, &fattr->size);
3978 if (status < 0)
3979 goto xdr_error;
3980 fattr->valid |= status;
3981
3982 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3983 if (status < 0)
3984 goto xdr_error;
3985 fattr->valid |= status;
3986
3987 status = decode_attr_error(xdr, bitmap);
3988 if (status < 0)
3989 goto xdr_error;
3990
3991 status = decode_attr_filehandle(xdr, bitmap, fh);
3992 if (status < 0)
3993 goto xdr_error;
3994
3995 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3996 if (status < 0)
3997 goto xdr_error;
3998 fattr->valid |= status;
3999
4000 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4001 struct nfs4_fs_locations,
4002 fattr));
4003 if (status < 0)
4004 goto xdr_error;
4005 fattr->valid |= status;
4006
4007 status = decode_attr_mode(xdr, bitmap, &fmode);
4008 if (status < 0)
4009 goto xdr_error;
4010 if (status != 0) {
4011 fattr->mode |= fmode;
4012 fattr->valid |= status;
4013 }
4014
4015 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4016 if (status < 0)
4017 goto xdr_error;
4018 fattr->valid |= status;
4019
4020 status = decode_attr_owner(xdr, bitmap, server->nfs_client,
4021 &fattr->uid, may_sleep);
4022 if (status < 0)
4023 goto xdr_error;
4024 fattr->valid |= status;
4025
4026 status = decode_attr_group(xdr, bitmap, server->nfs_client,
4027 &fattr->gid, may_sleep);
4028 if (status < 0)
4029 goto xdr_error;
4030 fattr->valid |= status;
4031
4032 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4033 if (status < 0)
4034 goto xdr_error;
4035 fattr->valid |= status;
4036
4037 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4038 if (status < 0)
4039 goto xdr_error;
4040 fattr->valid |= status;
4041
4042 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4043 if (status < 0)
4044 goto xdr_error;
4045 fattr->valid |= status;
4046
4047 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4048 if (status < 0)
4049 goto xdr_error;
4050 fattr->valid |= status;
4051
4052 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4053 if (status < 0)
4054 goto xdr_error;
4055 fattr->valid |= status;
4056
4057 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
4058 if (status < 0)
4059 goto xdr_error;
4060 if (status != 0 && !(fattr->valid & status)) {
4061 fattr->fileid = fileid;
4062 fattr->valid |= status;
4063 }
4064
4065 xdr_error:
4066 dprintk("%s: xdr returned %d\n", __func__, -status);
4067 return status;
4068 }
4069
4070 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4071 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4072 {
4073 __be32 *savep;
4074 uint32_t attrlen,
4075 bitmap[2] = {0};
4076 int status;
4077
4078 status = decode_op_hdr(xdr, OP_GETATTR);
4079 if (status < 0)
4080 goto xdr_error;
4081
4082 status = decode_attr_bitmap(xdr, bitmap);
4083 if (status < 0)
4084 goto xdr_error;
4085
4086 status = decode_attr_length(xdr, &attrlen, &savep);
4087 if (status < 0)
4088 goto xdr_error;
4089
4090 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4091 if (status < 0)
4092 goto xdr_error;
4093
4094 status = verify_attr_len(xdr, savep, attrlen);
4095 xdr_error:
4096 dprintk("%s: xdr returned %d\n", __func__, -status);
4097 return status;
4098 }
4099
4100 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4101 const struct nfs_server *server, int may_sleep)
4102 {
4103 return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4104 }
4105
4106 /*
4107 * Decode potentially multiple layout types. Currently we only support
4108 * one layout driver per file system.
4109 */
4110 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4111 uint32_t *layouttype)
4112 {
4113 uint32_t *p;
4114 int num;
4115
4116 p = xdr_inline_decode(xdr, 4);
4117 if (unlikely(!p))
4118 goto out_overflow;
4119 num = be32_to_cpup(p);
4120
4121 /* pNFS is not supported by the underlying file system */
4122 if (num == 0) {
4123 *layouttype = 0;
4124 return 0;
4125 }
4126 if (num > 1)
4127 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4128 "per filesystem not supported\n", __func__);
4129
4130 /* Decode and set first layout type, move xdr->p past unused types */
4131 p = xdr_inline_decode(xdr, num * 4);
4132 if (unlikely(!p))
4133 goto out_overflow;
4134 *layouttype = be32_to_cpup(p);
4135 return 0;
4136 out_overflow:
4137 print_overflow_msg(__func__, xdr);
4138 return -EIO;
4139 }
4140
4141 /*
4142 * The type of file system exported.
4143 * Note we must ensure that layouttype is set in any non-error case.
4144 */
4145 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4146 uint32_t *layouttype)
4147 {
4148 int status = 0;
4149
4150 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4151 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4152 return -EIO;
4153 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4154 status = decode_first_pnfs_layout_type(xdr, layouttype);
4155 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4156 } else
4157 *layouttype = 0;
4158 return status;
4159 }
4160
4161 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4162 {
4163 __be32 *savep;
4164 uint32_t attrlen, bitmap[2];
4165 int status;
4166
4167 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4168 goto xdr_error;
4169 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4170 goto xdr_error;
4171 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4172 goto xdr_error;
4173
4174 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4175
4176 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4177 goto xdr_error;
4178 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4179 goto xdr_error;
4180 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4181 goto xdr_error;
4182 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4183 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4184 goto xdr_error;
4185 fsinfo->wtpref = fsinfo->wtmax;
4186 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4187 if (status != 0)
4188 goto xdr_error;
4189 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4190 if (status != 0)
4191 goto xdr_error;
4192
4193 status = verify_attr_len(xdr, savep, attrlen);
4194 xdr_error:
4195 dprintk("%s: xdr returned %d!\n", __func__, -status);
4196 return status;
4197 }
4198
4199 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4200 {
4201 __be32 *p;
4202 uint32_t len;
4203 int status;
4204
4205 /* Zero handle first to allow comparisons */
4206 memset(fh, 0, sizeof(*fh));
4207
4208 status = decode_op_hdr(xdr, OP_GETFH);
4209 if (status)
4210 return status;
4211
4212 p = xdr_inline_decode(xdr, 4);
4213 if (unlikely(!p))
4214 goto out_overflow;
4215 len = be32_to_cpup(p);
4216 if (len > NFS4_FHSIZE)
4217 return -EIO;
4218 fh->size = len;
4219 p = xdr_inline_decode(xdr, len);
4220 if (unlikely(!p))
4221 goto out_overflow;
4222 memcpy(fh->data, p, len);
4223 return 0;
4224 out_overflow:
4225 print_overflow_msg(__func__, xdr);
4226 return -EIO;
4227 }
4228
4229 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4230 {
4231 int status;
4232
4233 status = decode_op_hdr(xdr, OP_LINK);
4234 if (status)
4235 return status;
4236 return decode_change_info(xdr, cinfo);
4237 }
4238
4239 /*
4240 * We create the owner, so we know a proper owner.id length is 4.
4241 */
4242 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4243 {
4244 uint64_t offset, length, clientid;
4245 __be32 *p;
4246 uint32_t namelen, type;
4247
4248 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4249 if (unlikely(!p))
4250 goto out_overflow;
4251 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4252 p = xdr_decode_hyper(p, &length);
4253 type = be32_to_cpup(p++); /* 4 byte read */
4254 if (fl != NULL) { /* manipulate file lock */
4255 fl->fl_start = (loff_t)offset;
4256 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4257 if (length == ~(uint64_t)0)
4258 fl->fl_end = OFFSET_MAX;
4259 fl->fl_type = F_WRLCK;
4260 if (type & 1)
4261 fl->fl_type = F_RDLCK;
4262 fl->fl_pid = 0;
4263 }
4264 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4265 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4266 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4267 if (likely(p))
4268 return -NFS4ERR_DENIED;
4269 out_overflow:
4270 print_overflow_msg(__func__, xdr);
4271 return -EIO;
4272 }
4273
4274 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4275 {
4276 int status;
4277
4278 status = decode_op_hdr(xdr, OP_LOCK);
4279 if (status == -EIO)
4280 goto out;
4281 if (status == 0) {
4282 status = decode_stateid(xdr, &res->stateid);
4283 if (unlikely(status))
4284 goto out;
4285 } else if (status == -NFS4ERR_DENIED)
4286 status = decode_lock_denied(xdr, NULL);
4287 if (res->open_seqid != NULL)
4288 nfs_increment_open_seqid(status, res->open_seqid);
4289 nfs_increment_lock_seqid(status, res->lock_seqid);
4290 out:
4291 return status;
4292 }
4293
4294 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4295 {
4296 int status;
4297 status = decode_op_hdr(xdr, OP_LOCKT);
4298 if (status == -NFS4ERR_DENIED)
4299 return decode_lock_denied(xdr, res->denied);
4300 return status;
4301 }
4302
4303 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4304 {
4305 int status;
4306
4307 status = decode_op_hdr(xdr, OP_LOCKU);
4308 if (status != -EIO)
4309 nfs_increment_lock_seqid(status, res->seqid);
4310 if (status == 0)
4311 status = decode_stateid(xdr, &res->stateid);
4312 return status;
4313 }
4314
4315 static int decode_release_lockowner(struct xdr_stream *xdr)
4316 {
4317 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4318 }
4319
4320 static int decode_lookup(struct xdr_stream *xdr)
4321 {
4322 return decode_op_hdr(xdr, OP_LOOKUP);
4323 }
4324
4325 /* This is too sick! */
4326 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4327 {
4328 __be32 *p;
4329 uint32_t limit_type, nblocks, blocksize;
4330
4331 p = xdr_inline_decode(xdr, 12);
4332 if (unlikely(!p))
4333 goto out_overflow;
4334 limit_type = be32_to_cpup(p++);
4335 switch (limit_type) {
4336 case 1:
4337 xdr_decode_hyper(p, maxsize);
4338 break;
4339 case 2:
4340 nblocks = be32_to_cpup(p++);
4341 blocksize = be32_to_cpup(p);
4342 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4343 }
4344 return 0;
4345 out_overflow:
4346 print_overflow_msg(__func__, xdr);
4347 return -EIO;
4348 }
4349
4350 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4351 {
4352 __be32 *p;
4353 uint32_t delegation_type;
4354 int status;
4355
4356 p = xdr_inline_decode(xdr, 4);
4357 if (unlikely(!p))
4358 goto out_overflow;
4359 delegation_type = be32_to_cpup(p);
4360 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4361 res->delegation_type = 0;
4362 return 0;
4363 }
4364 status = decode_stateid(xdr, &res->delegation);
4365 if (unlikely(status))
4366 return status;
4367 p = xdr_inline_decode(xdr, 4);
4368 if (unlikely(!p))
4369 goto out_overflow;
4370 res->do_recall = be32_to_cpup(p);
4371
4372 switch (delegation_type) {
4373 case NFS4_OPEN_DELEGATE_READ:
4374 res->delegation_type = FMODE_READ;
4375 break;
4376 case NFS4_OPEN_DELEGATE_WRITE:
4377 res->delegation_type = FMODE_WRITE|FMODE_READ;
4378 if (decode_space_limit(xdr, &res->maxsize) < 0)
4379 return -EIO;
4380 }
4381 return decode_ace(xdr, NULL, res->server->nfs_client);
4382 out_overflow:
4383 print_overflow_msg(__func__, xdr);
4384 return -EIO;
4385 }
4386
4387 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4388 {
4389 __be32 *p;
4390 uint32_t savewords, bmlen, i;
4391 int status;
4392
4393 status = decode_op_hdr(xdr, OP_OPEN);
4394 if (status != -EIO)
4395 nfs_increment_open_seqid(status, res->seqid);
4396 if (!status)
4397 status = decode_stateid(xdr, &res->stateid);
4398 if (unlikely(status))
4399 return status;
4400
4401 decode_change_info(xdr, &res->cinfo);
4402
4403 p = xdr_inline_decode(xdr, 8);
4404 if (unlikely(!p))
4405 goto out_overflow;
4406 res->rflags = be32_to_cpup(p++);
4407 bmlen = be32_to_cpup(p);
4408 if (bmlen > 10)
4409 goto xdr_error;
4410
4411 p = xdr_inline_decode(xdr, bmlen << 2);
4412 if (unlikely(!p))
4413 goto out_overflow;
4414 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4415 for (i = 0; i < savewords; ++i)
4416 res->attrset[i] = be32_to_cpup(p++);
4417 for (; i < NFS4_BITMAP_SIZE; i++)
4418 res->attrset[i] = 0;
4419
4420 return decode_delegation(xdr, res);
4421 xdr_error:
4422 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4423 return -EIO;
4424 out_overflow:
4425 print_overflow_msg(__func__, xdr);
4426 return -EIO;
4427 }
4428
4429 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4430 {
4431 int status;
4432
4433 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4434 if (status != -EIO)
4435 nfs_increment_open_seqid(status, res->seqid);
4436 if (!status)
4437 status = decode_stateid(xdr, &res->stateid);
4438 return status;
4439 }
4440
4441 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4442 {
4443 int status;
4444
4445 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4446 if (status != -EIO)
4447 nfs_increment_open_seqid(status, res->seqid);
4448 if (!status)
4449 status = decode_stateid(xdr, &res->stateid);
4450 return status;
4451 }
4452
4453 static int decode_putfh(struct xdr_stream *xdr)
4454 {
4455 return decode_op_hdr(xdr, OP_PUTFH);
4456 }
4457
4458 static int decode_putrootfh(struct xdr_stream *xdr)
4459 {
4460 return decode_op_hdr(xdr, OP_PUTROOTFH);
4461 }
4462
4463 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4464 {
4465 struct kvec *iov = req->rq_rcv_buf.head;
4466 __be32 *p;
4467 uint32_t count, eof, recvd, hdrlen;
4468 int status;
4469
4470 status = decode_op_hdr(xdr, OP_READ);
4471 if (status)
4472 return status;
4473 p = xdr_inline_decode(xdr, 8);
4474 if (unlikely(!p))
4475 goto out_overflow;
4476 eof = be32_to_cpup(p++);
4477 count = be32_to_cpup(p);
4478 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4479 recvd = req->rq_rcv_buf.len - hdrlen;
4480 if (count > recvd) {
4481 dprintk("NFS: server cheating in read reply: "
4482 "count %u > recvd %u\n", count, recvd);
4483 count = recvd;
4484 eof = 0;
4485 }
4486 xdr_read_pages(xdr, count);
4487 res->eof = eof;
4488 res->count = count;
4489 return 0;
4490 out_overflow:
4491 print_overflow_msg(__func__, xdr);
4492 return -EIO;
4493 }
4494
4495 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4496 {
4497 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4498 struct kvec *iov = rcvbuf->head;
4499 size_t hdrlen;
4500 u32 recvd, pglen = rcvbuf->page_len;
4501 int status;
4502
4503 status = decode_op_hdr(xdr, OP_READDIR);
4504 if (!status)
4505 status = decode_verifier(xdr, readdir->verifier.data);
4506 if (unlikely(status))
4507 return status;
4508 dprintk("%s: verifier = %08x:%08x\n",
4509 __func__,
4510 ((u32 *)readdir->verifier.data)[0],
4511 ((u32 *)readdir->verifier.data)[1]);
4512
4513
4514 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4515 recvd = rcvbuf->len - hdrlen;
4516 if (pglen > recvd)
4517 pglen = recvd;
4518 xdr_read_pages(xdr, pglen);
4519
4520
4521 return 0;
4522 }
4523
4524 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4525 {
4526 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4527 struct kvec *iov = rcvbuf->head;
4528 size_t hdrlen;
4529 u32 len, recvd;
4530 __be32 *p;
4531 int status;
4532
4533 status = decode_op_hdr(xdr, OP_READLINK);
4534 if (status)
4535 return status;
4536
4537 /* Convert length of symlink */
4538 p = xdr_inline_decode(xdr, 4);
4539 if (unlikely(!p))
4540 goto out_overflow;
4541 len = be32_to_cpup(p);
4542 if (len >= rcvbuf->page_len || len <= 0) {
4543 dprintk("nfs: server returned giant symlink!\n");
4544 return -ENAMETOOLONG;
4545 }
4546 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4547 recvd = req->rq_rcv_buf.len - hdrlen;
4548 if (recvd < len) {
4549 dprintk("NFS: server cheating in readlink reply: "
4550 "count %u > recvd %u\n", len, recvd);
4551 return -EIO;
4552 }
4553 xdr_read_pages(xdr, len);
4554 /*
4555 * The XDR encode routine has set things up so that
4556 * the link text will be copied directly into the
4557 * buffer. We just have to do overflow-checking,
4558 * and and null-terminate the text (the VFS expects
4559 * null-termination).
4560 */
4561 xdr_terminate_string(rcvbuf, len);
4562 return 0;
4563 out_overflow:
4564 print_overflow_msg(__func__, xdr);
4565 return -EIO;
4566 }
4567
4568 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4569 {
4570 int status;
4571
4572 status = decode_op_hdr(xdr, OP_REMOVE);
4573 if (status)
4574 goto out;
4575 status = decode_change_info(xdr, cinfo);
4576 out:
4577 return status;
4578 }
4579
4580 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4581 struct nfs4_change_info *new_cinfo)
4582 {
4583 int status;
4584
4585 status = decode_op_hdr(xdr, OP_RENAME);
4586 if (status)
4587 goto out;
4588 if ((status = decode_change_info(xdr, old_cinfo)))
4589 goto out;
4590 status = decode_change_info(xdr, new_cinfo);
4591 out:
4592 return status;
4593 }
4594
4595 static int decode_renew(struct xdr_stream *xdr)
4596 {
4597 return decode_op_hdr(xdr, OP_RENEW);
4598 }
4599
4600 static int
4601 decode_restorefh(struct xdr_stream *xdr)
4602 {
4603 return decode_op_hdr(xdr, OP_RESTOREFH);
4604 }
4605
4606 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4607 size_t *acl_len)
4608 {
4609 __be32 *savep;
4610 uint32_t attrlen,
4611 bitmap[2] = {0};
4612 struct kvec *iov = req->rq_rcv_buf.head;
4613 int status;
4614
4615 *acl_len = 0;
4616 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4617 goto out;
4618 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4619 goto out;
4620 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4621 goto out;
4622
4623 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4624 return -EIO;
4625 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4626 size_t hdrlen;
4627 u32 recvd;
4628
4629 /* We ignore &savep and don't do consistency checks on
4630 * the attr length. Let userspace figure it out.... */
4631 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4632 recvd = req->rq_rcv_buf.len - hdrlen;
4633 if (attrlen > recvd) {
4634 dprintk("NFS: server cheating in getattr"
4635 " acl reply: attrlen %u > recvd %u\n",
4636 attrlen, recvd);
4637 return -EINVAL;
4638 }
4639 xdr_read_pages(xdr, attrlen);
4640 *acl_len = attrlen;
4641 } else
4642 status = -EOPNOTSUPP;
4643
4644 out:
4645 return status;
4646 }
4647
4648 static int
4649 decode_savefh(struct xdr_stream *xdr)
4650 {
4651 return decode_op_hdr(xdr, OP_SAVEFH);
4652 }
4653
4654 static int decode_setattr(struct xdr_stream *xdr)
4655 {
4656 __be32 *p;
4657 uint32_t bmlen;
4658 int status;
4659
4660 status = decode_op_hdr(xdr, OP_SETATTR);
4661 if (status)
4662 return status;
4663 p = xdr_inline_decode(xdr, 4);
4664 if (unlikely(!p))
4665 goto out_overflow;
4666 bmlen = be32_to_cpup(p);
4667 p = xdr_inline_decode(xdr, bmlen << 2);
4668 if (likely(p))
4669 return 0;
4670 out_overflow:
4671 print_overflow_msg(__func__, xdr);
4672 return -EIO;
4673 }
4674
4675 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4676 {
4677 __be32 *p;
4678 uint32_t opnum;
4679 int32_t nfserr;
4680
4681 p = xdr_inline_decode(xdr, 8);
4682 if (unlikely(!p))
4683 goto out_overflow;
4684 opnum = be32_to_cpup(p++);
4685 if (opnum != OP_SETCLIENTID) {
4686 dprintk("nfs: decode_setclientid: Server returned operation"
4687 " %d\n", opnum);
4688 return -EIO;
4689 }
4690 nfserr = be32_to_cpup(p);
4691 if (nfserr == NFS_OK) {
4692 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4693 if (unlikely(!p))
4694 goto out_overflow;
4695 p = xdr_decode_hyper(p, &res->clientid);
4696 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4697 } else if (nfserr == NFSERR_CLID_INUSE) {
4698 uint32_t len;
4699
4700 /* skip netid string */
4701 p = xdr_inline_decode(xdr, 4);
4702 if (unlikely(!p))
4703 goto out_overflow;
4704 len = be32_to_cpup(p);
4705 p = xdr_inline_decode(xdr, len);
4706 if (unlikely(!p))
4707 goto out_overflow;
4708
4709 /* skip uaddr string */
4710 p = xdr_inline_decode(xdr, 4);
4711 if (unlikely(!p))
4712 goto out_overflow;
4713 len = be32_to_cpup(p);
4714 p = xdr_inline_decode(xdr, len);
4715 if (unlikely(!p))
4716 goto out_overflow;
4717 return -NFSERR_CLID_INUSE;
4718 } else
4719 return nfs4_stat_to_errno(nfserr);
4720
4721 return 0;
4722 out_overflow:
4723 print_overflow_msg(__func__, xdr);
4724 return -EIO;
4725 }
4726
4727 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4728 {
4729 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4730 }
4731
4732 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4733 {
4734 __be32 *p;
4735 int status;
4736
4737 status = decode_op_hdr(xdr, OP_WRITE);
4738 if (status)
4739 return status;
4740
4741 p = xdr_inline_decode(xdr, 16);
4742 if (unlikely(!p))
4743 goto out_overflow;
4744 res->count = be32_to_cpup(p++);
4745 res->verf->committed = be32_to_cpup(p++);
4746 memcpy(res->verf->verifier, p, 8);
4747 return 0;
4748 out_overflow:
4749 print_overflow_msg(__func__, xdr);
4750 return -EIO;
4751 }
4752
4753 static int decode_delegreturn(struct xdr_stream *xdr)
4754 {
4755 return decode_op_hdr(xdr, OP_DELEGRETURN);
4756 }
4757
4758 #if defined(CONFIG_NFS_V4_1)
4759 static int decode_exchange_id(struct xdr_stream *xdr,
4760 struct nfs41_exchange_id_res *res)
4761 {
4762 __be32 *p;
4763 uint32_t dummy;
4764 char *dummy_str;
4765 int status;
4766 struct nfs_client *clp = res->client;
4767
4768 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4769 if (status)
4770 return status;
4771
4772 p = xdr_inline_decode(xdr, 8);
4773 if (unlikely(!p))
4774 goto out_overflow;
4775 xdr_decode_hyper(p, &clp->cl_ex_clid);
4776 p = xdr_inline_decode(xdr, 12);
4777 if (unlikely(!p))
4778 goto out_overflow;
4779 clp->cl_seqid = be32_to_cpup(p++);
4780 clp->cl_exchange_flags = be32_to_cpup(p++);
4781
4782 /* We ask for SP4_NONE */
4783 dummy = be32_to_cpup(p);
4784 if (dummy != SP4_NONE)
4785 return -EIO;
4786
4787 /* Throw away minor_id */
4788 p = xdr_inline_decode(xdr, 8);
4789 if (unlikely(!p))
4790 goto out_overflow;
4791
4792 /* Throw away Major id */
4793 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4794 if (unlikely(status))
4795 return status;
4796
4797 /* Throw away server_scope */
4798 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4799 if (unlikely(status))
4800 return status;
4801
4802 /* Throw away Implementation id array */
4803 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4804 if (unlikely(status))
4805 return status;
4806
4807 return 0;
4808 out_overflow:
4809 print_overflow_msg(__func__, xdr);
4810 return -EIO;
4811 }
4812
4813 static int decode_chan_attrs(struct xdr_stream *xdr,
4814 struct nfs4_channel_attrs *attrs)
4815 {
4816 __be32 *p;
4817 u32 nr_attrs;
4818
4819 p = xdr_inline_decode(xdr, 28);
4820 if (unlikely(!p))
4821 goto out_overflow;
4822 attrs->headerpadsz = be32_to_cpup(p++);
4823 attrs->max_rqst_sz = be32_to_cpup(p++);
4824 attrs->max_resp_sz = be32_to_cpup(p++);
4825 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4826 attrs->max_ops = be32_to_cpup(p++);
4827 attrs->max_reqs = be32_to_cpup(p++);
4828 nr_attrs = be32_to_cpup(p);
4829 if (unlikely(nr_attrs > 1)) {
4830 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4831 __func__, nr_attrs);
4832 return -EINVAL;
4833 }
4834 if (nr_attrs == 1) {
4835 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4836 if (unlikely(!p))
4837 goto out_overflow;
4838 }
4839 return 0;
4840 out_overflow:
4841 print_overflow_msg(__func__, xdr);
4842 return -EIO;
4843 }
4844
4845 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4846 {
4847 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4848 }
4849
4850 static int decode_create_session(struct xdr_stream *xdr,
4851 struct nfs41_create_session_res *res)
4852 {
4853 __be32 *p;
4854 int status;
4855 struct nfs_client *clp = res->client;
4856 struct nfs4_session *session = clp->cl_session;
4857
4858 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4859 if (!status)
4860 status = decode_sessionid(xdr, &session->sess_id);
4861 if (unlikely(status))
4862 return status;
4863
4864 /* seqid, flags */
4865 p = xdr_inline_decode(xdr, 8);
4866 if (unlikely(!p))
4867 goto out_overflow;
4868 clp->cl_seqid = be32_to_cpup(p++);
4869 session->flags = be32_to_cpup(p);
4870
4871 /* Channel attributes */
4872 status = decode_chan_attrs(xdr, &session->fc_attrs);
4873 if (!status)
4874 status = decode_chan_attrs(xdr, &session->bc_attrs);
4875 return status;
4876 out_overflow:
4877 print_overflow_msg(__func__, xdr);
4878 return -EIO;
4879 }
4880
4881 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4882 {
4883 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4884 }
4885
4886 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4887 {
4888 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4889 }
4890 #endif /* CONFIG_NFS_V4_1 */
4891
4892 static int decode_sequence(struct xdr_stream *xdr,
4893 struct nfs4_sequence_res *res,
4894 struct rpc_rqst *rqstp)
4895 {
4896 #if defined(CONFIG_NFS_V4_1)
4897 struct nfs4_sessionid id;
4898 u32 dummy;
4899 int status;
4900 __be32 *p;
4901
4902 if (!res->sr_session)
4903 return 0;
4904
4905 status = decode_op_hdr(xdr, OP_SEQUENCE);
4906 if (!status)
4907 status = decode_sessionid(xdr, &id);
4908 if (unlikely(status))
4909 goto out_err;
4910
4911 /*
4912 * If the server returns different values for sessionID, slotID or
4913 * sequence number, the server is looney tunes.
4914 */
4915 status = -EREMOTEIO;
4916
4917 if (memcmp(id.data, res->sr_session->sess_id.data,
4918 NFS4_MAX_SESSIONID_LEN)) {
4919 dprintk("%s Invalid session id\n", __func__);
4920 goto out_err;
4921 }
4922
4923 p = xdr_inline_decode(xdr, 20);
4924 if (unlikely(!p))
4925 goto out_overflow;
4926
4927 /* seqid */
4928 dummy = be32_to_cpup(p++);
4929 if (dummy != res->sr_slot->seq_nr) {
4930 dprintk("%s Invalid sequence number\n", __func__);
4931 goto out_err;
4932 }
4933 /* slot id */
4934 dummy = be32_to_cpup(p++);
4935 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4936 dprintk("%s Invalid slot id\n", __func__);
4937 goto out_err;
4938 }
4939 /* highest slot id - currently not processed */
4940 dummy = be32_to_cpup(p++);
4941 /* target highest slot id - currently not processed */
4942 dummy = be32_to_cpup(p++);
4943 /* result flags */
4944 res->sr_status_flags = be32_to_cpup(p);
4945 status = 0;
4946 out_err:
4947 res->sr_status = status;
4948 return status;
4949 out_overflow:
4950 print_overflow_msg(__func__, xdr);
4951 status = -EIO;
4952 goto out_err;
4953 #else /* CONFIG_NFS_V4_1 */
4954 return 0;
4955 #endif /* CONFIG_NFS_V4_1 */
4956 }
4957
4958 #if defined(CONFIG_NFS_V4_1)
4959
4960 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4961 struct pnfs_device *pdev)
4962 {
4963 __be32 *p;
4964 uint32_t len, type;
4965 int status;
4966
4967 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4968 if (status) {
4969 if (status == -ETOOSMALL) {
4970 p = xdr_inline_decode(xdr, 4);
4971 if (unlikely(!p))
4972 goto out_overflow;
4973 pdev->mincount = be32_to_cpup(p);
4974 dprintk("%s: Min count too small. mincnt = %u\n",
4975 __func__, pdev->mincount);
4976 }
4977 return status;
4978 }
4979
4980 p = xdr_inline_decode(xdr, 8);
4981 if (unlikely(!p))
4982 goto out_overflow;
4983 type = be32_to_cpup(p++);
4984 if (type != pdev->layout_type) {
4985 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4986 __func__, pdev->layout_type, type);
4987 return -EINVAL;
4988 }
4989 /*
4990 * Get the length of the opaque device_addr4. xdr_read_pages places
4991 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4992 * and places the remaining xdr data in xdr_buf->tail
4993 */
4994 pdev->mincount = be32_to_cpup(p);
4995 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4996
4997 /* Parse notification bitmap, verifying that it is zero. */
4998 p = xdr_inline_decode(xdr, 4);
4999 if (unlikely(!p))
5000 goto out_overflow;
5001 len = be32_to_cpup(p);
5002 if (len) {
5003 int i;
5004
5005 p = xdr_inline_decode(xdr, 4 * len);
5006 if (unlikely(!p))
5007 goto out_overflow;
5008 for (i = 0; i < len; i++, p++) {
5009 if (be32_to_cpup(p)) {
5010 dprintk("%s: notifications not supported\n",
5011 __func__);
5012 return -EIO;
5013 }
5014 }
5015 }
5016 return 0;
5017 out_overflow:
5018 print_overflow_msg(__func__, xdr);
5019 return -EIO;
5020 }
5021
5022 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5023 struct nfs4_layoutget_res *res)
5024 {
5025 __be32 *p;
5026 int status;
5027 u32 layout_count;
5028
5029 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5030 if (status)
5031 return status;
5032 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5033 if (unlikely(!p))
5034 goto out_overflow;
5035 res->return_on_close = be32_to_cpup(p++);
5036 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5037 layout_count = be32_to_cpup(p);
5038 if (!layout_count) {
5039 dprintk("%s: server responded with empty layout array\n",
5040 __func__);
5041 return -EINVAL;
5042 }
5043
5044 p = xdr_inline_decode(xdr, 24);
5045 if (unlikely(!p))
5046 goto out_overflow;
5047 p = xdr_decode_hyper(p, &res->range.offset);
5048 p = xdr_decode_hyper(p, &res->range.length);
5049 res->range.iomode = be32_to_cpup(p++);
5050 res->type = be32_to_cpup(p++);
5051
5052 status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
5053 if (unlikely(status))
5054 return status;
5055
5056 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5057 __func__,
5058 (unsigned long)res->range.offset,
5059 (unsigned long)res->range.length,
5060 res->range.iomode,
5061 res->type,
5062 res->layout.len);
5063
5064 /* nfs4_proc_layoutget allocated a single page */
5065 if (res->layout.len > PAGE_SIZE)
5066 return -ENOMEM;
5067 memcpy(res->layout.buf, p, res->layout.len);
5068
5069 if (layout_count > 1) {
5070 /* We only handle a length one array at the moment. Any
5071 * further entries are just ignored. Note that this means
5072 * the client may see a response that is less than the
5073 * minimum it requested.
5074 */
5075 dprintk("%s: server responded with %d layouts, dropping tail\n",
5076 __func__, layout_count);
5077 }
5078
5079 return 0;
5080 out_overflow:
5081 print_overflow_msg(__func__, xdr);
5082 return -EIO;
5083 }
5084 #endif /* CONFIG_NFS_V4_1 */
5085
5086 /*
5087 * END OF "GENERIC" DECODE ROUTINES.
5088 */
5089
5090 /*
5091 * Decode OPEN_DOWNGRADE response
5092 */
5093 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5094 {
5095 struct xdr_stream xdr;
5096 struct compound_hdr hdr;
5097 int status;
5098
5099 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5100 status = decode_compound_hdr(&xdr, &hdr);
5101 if (status)
5102 goto out;
5103 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5104 if (status)
5105 goto out;
5106 status = decode_putfh(&xdr);
5107 if (status)
5108 goto out;
5109 status = decode_open_downgrade(&xdr, res);
5110 if (status != 0)
5111 goto out;
5112 decode_getfattr(&xdr, res->fattr, res->server,
5113 !RPC_IS_ASYNC(rqstp->rq_task));
5114 out:
5115 return status;
5116 }
5117
5118 /*
5119 * Decode ACCESS response
5120 */
5121 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
5122 {
5123 struct xdr_stream xdr;
5124 struct compound_hdr hdr;
5125 int status;
5126
5127 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5128 status = decode_compound_hdr(&xdr, &hdr);
5129 if (status)
5130 goto out;
5131 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5132 if (status)
5133 goto out;
5134 status = decode_putfh(&xdr);
5135 if (status != 0)
5136 goto out;
5137 status = decode_access(&xdr, res);
5138 if (status != 0)
5139 goto out;
5140 decode_getfattr(&xdr, res->fattr, res->server,
5141 !RPC_IS_ASYNC(rqstp->rq_task));
5142 out:
5143 return status;
5144 }
5145
5146 /*
5147 * Decode LOOKUP response
5148 */
5149 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
5150 {
5151 struct xdr_stream xdr;
5152 struct compound_hdr hdr;
5153 int status;
5154
5155 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5156 status = decode_compound_hdr(&xdr, &hdr);
5157 if (status)
5158 goto out;
5159 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5160 if (status)
5161 goto out;
5162 if ((status = decode_putfh(&xdr)) != 0)
5163 goto out;
5164 if ((status = decode_lookup(&xdr)) != 0)
5165 goto out;
5166 if ((status = decode_getfh(&xdr, res->fh)) != 0)
5167 goto out;
5168 status = decode_getfattr(&xdr, res->fattr, res->server
5169 ,!RPC_IS_ASYNC(rqstp->rq_task));
5170 out:
5171 return status;
5172 }
5173
5174 /*
5175 * Decode LOOKUP_ROOT response
5176 */
5177 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
5178 {
5179 struct xdr_stream xdr;
5180 struct compound_hdr hdr;
5181 int status;
5182
5183 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5184 status = decode_compound_hdr(&xdr, &hdr);
5185 if (status)
5186 goto out;
5187 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5188 if (status)
5189 goto out;
5190 if ((status = decode_putrootfh(&xdr)) != 0)
5191 goto out;
5192 if ((status = decode_getfh(&xdr, res->fh)) == 0)
5193 status = decode_getfattr(&xdr, res->fattr, res->server,
5194 !RPC_IS_ASYNC(rqstp->rq_task));
5195 out:
5196 return status;
5197 }
5198
5199 /*
5200 * Decode REMOVE response
5201 */
5202 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
5203 {
5204 struct xdr_stream xdr;
5205 struct compound_hdr hdr;
5206 int status;
5207
5208 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5209 status = decode_compound_hdr(&xdr, &hdr);
5210 if (status)
5211 goto out;
5212 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5213 if (status)
5214 goto out;
5215 if ((status = decode_putfh(&xdr)) != 0)
5216 goto out;
5217 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
5218 goto out;
5219 decode_getfattr(&xdr, res->dir_attr, res->server,
5220 !RPC_IS_ASYNC(rqstp->rq_task));
5221 out:
5222 return status;
5223 }
5224
5225 /*
5226 * Decode RENAME response
5227 */
5228 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
5229 {
5230 struct xdr_stream xdr;
5231 struct compound_hdr hdr;
5232 int status;
5233
5234 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5235 status = decode_compound_hdr(&xdr, &hdr);
5236 if (status)
5237 goto out;
5238 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5239 if (status)
5240 goto out;
5241 if ((status = decode_putfh(&xdr)) != 0)
5242 goto out;
5243 if ((status = decode_savefh(&xdr)) != 0)
5244 goto out;
5245 if ((status = decode_putfh(&xdr)) != 0)
5246 goto out;
5247 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
5248 goto out;
5249 /* Current FH is target directory */
5250 if (decode_getfattr(&xdr, res->new_fattr, res->server,
5251 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5252 goto out;
5253 if ((status = decode_restorefh(&xdr)) != 0)
5254 goto out;
5255 decode_getfattr(&xdr, res->old_fattr, res->server,
5256 !RPC_IS_ASYNC(rqstp->rq_task));
5257 out:
5258 return status;
5259 }
5260
5261 /*
5262 * Decode LINK response
5263 */
5264 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
5265 {
5266 struct xdr_stream xdr;
5267 struct compound_hdr hdr;
5268 int status;
5269
5270 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5271 status = decode_compound_hdr(&xdr, &hdr);
5272 if (status)
5273 goto out;
5274 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5275 if (status)
5276 goto out;
5277 if ((status = decode_putfh(&xdr)) != 0)
5278 goto out;
5279 if ((status = decode_savefh(&xdr)) != 0)
5280 goto out;
5281 if ((status = decode_putfh(&xdr)) != 0)
5282 goto out;
5283 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
5284 goto out;
5285 /*
5286 * Note order: OP_LINK leaves the directory as the current
5287 * filehandle.
5288 */
5289 if (decode_getfattr(&xdr, res->dir_attr, res->server,
5290 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5291 goto out;
5292 if ((status = decode_restorefh(&xdr)) != 0)
5293 goto out;
5294 decode_getfattr(&xdr, res->fattr, res->server,
5295 !RPC_IS_ASYNC(rqstp->rq_task));
5296 out:
5297 return status;
5298 }
5299
5300 /*
5301 * Decode CREATE response
5302 */
5303 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
5304 {
5305 struct xdr_stream xdr;
5306 struct compound_hdr hdr;
5307 int status;
5308
5309 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5310 status = decode_compound_hdr(&xdr, &hdr);
5311 if (status)
5312 goto out;
5313 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5314 if (status)
5315 goto out;
5316 if ((status = decode_putfh(&xdr)) != 0)
5317 goto out;
5318 if ((status = decode_savefh(&xdr)) != 0)
5319 goto out;
5320 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
5321 goto out;
5322 if ((status = decode_getfh(&xdr, res->fh)) != 0)
5323 goto out;
5324 if (decode_getfattr(&xdr, res->fattr, res->server,
5325 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5326 goto out;
5327 if ((status = decode_restorefh(&xdr)) != 0)
5328 goto out;
5329 decode_getfattr(&xdr, res->dir_fattr, res->server,
5330 !RPC_IS_ASYNC(rqstp->rq_task));
5331 out:
5332 return status;
5333 }
5334
5335 /*
5336 * Decode SYMLINK response
5337 */
5338 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
5339 {
5340 return nfs4_xdr_dec_create(rqstp, p, res);
5341 }
5342
5343 /*
5344 * Decode GETATTR response
5345 */
5346 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
5347 {
5348 struct xdr_stream xdr;
5349 struct compound_hdr hdr;
5350 int status;
5351
5352 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5353 status = decode_compound_hdr(&xdr, &hdr);
5354 if (status)
5355 goto out;
5356 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5357 if (status)
5358 goto out;
5359 status = decode_putfh(&xdr);
5360 if (status)
5361 goto out;
5362 status = decode_getfattr(&xdr, res->fattr, res->server,
5363 !RPC_IS_ASYNC(rqstp->rq_task));
5364 out:
5365 return status;
5366 }
5367
5368 /*
5369 * Encode an SETACL request
5370 */
5371 static int
5372 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5373 {
5374 struct xdr_stream xdr;
5375 struct compound_hdr hdr = {
5376 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5377 };
5378 int status;
5379
5380 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5381 encode_compound_hdr(&xdr, req, &hdr);
5382 encode_sequence(&xdr, &args->seq_args, &hdr);
5383 encode_putfh(&xdr, args->fh, &hdr);
5384 status = encode_setacl(&xdr, args, &hdr);
5385 encode_nops(&hdr);
5386 return status;
5387 }
5388
5389 /*
5390 * Decode SETACL response
5391 */
5392 static int
5393 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
5394 struct nfs_setaclres *res)
5395 {
5396 struct xdr_stream xdr;
5397 struct compound_hdr hdr;
5398 int status;
5399
5400 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5401 status = decode_compound_hdr(&xdr, &hdr);
5402 if (status)
5403 goto out;
5404 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5405 if (status)
5406 goto out;
5407 status = decode_putfh(&xdr);
5408 if (status)
5409 goto out;
5410 status = decode_setattr(&xdr);
5411 out:
5412 return status;
5413 }
5414
5415 /*
5416 * Decode GETACL response
5417 */
5418 static int
5419 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5420 struct nfs_getaclres *res)
5421 {
5422 struct xdr_stream xdr;
5423 struct compound_hdr hdr;
5424 int status;
5425
5426 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5427 status = decode_compound_hdr(&xdr, &hdr);
5428 if (status)
5429 goto out;
5430 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5431 if (status)
5432 goto out;
5433 status = decode_putfh(&xdr);
5434 if (status)
5435 goto out;
5436 status = decode_getacl(&xdr, rqstp, &res->acl_len);
5437
5438 out:
5439 return status;
5440 }
5441
5442 /*
5443 * Decode CLOSE response
5444 */
5445 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5446 {
5447 struct xdr_stream xdr;
5448 struct compound_hdr hdr;
5449 int status;
5450
5451 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5452 status = decode_compound_hdr(&xdr, &hdr);
5453 if (status)
5454 goto out;
5455 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5456 if (status)
5457 goto out;
5458 status = decode_putfh(&xdr);
5459 if (status)
5460 goto out;
5461 status = decode_close(&xdr, res);
5462 if (status != 0)
5463 goto out;
5464 /*
5465 * Note: Server may do delete on close for this file
5466 * in which case the getattr call will fail with
5467 * an ESTALE error. Shouldn't be a problem,
5468 * though, since fattr->valid will remain unset.
5469 */
5470 decode_getfattr(&xdr, res->fattr, res->server,
5471 !RPC_IS_ASYNC(rqstp->rq_task));
5472 out:
5473 return status;
5474 }
5475
5476 /*
5477 * Decode OPEN response
5478 */
5479 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5480 {
5481 struct xdr_stream xdr;
5482 struct compound_hdr hdr;
5483 int status;
5484
5485 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5486 status = decode_compound_hdr(&xdr, &hdr);
5487 if (status)
5488 goto out;
5489 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5490 if (status)
5491 goto out;
5492 status = decode_putfh(&xdr);
5493 if (status)
5494 goto out;
5495 status = decode_savefh(&xdr);
5496 if (status)
5497 goto out;
5498 status = decode_open(&xdr, res);
5499 if (status)
5500 goto out;
5501 if (decode_getfh(&xdr, &res->fh) != 0)
5502 goto out;
5503 if (decode_getfattr(&xdr, res->f_attr, res->server,
5504 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5505 goto out;
5506 if (decode_restorefh(&xdr) != 0)
5507 goto out;
5508 decode_getfattr(&xdr, res->dir_attr, res->server,
5509 !RPC_IS_ASYNC(rqstp->rq_task));
5510 out:
5511 return status;
5512 }
5513
5514 /*
5515 * Decode OPEN_CONFIRM response
5516 */
5517 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5518 {
5519 struct xdr_stream xdr;
5520 struct compound_hdr hdr;
5521 int status;
5522
5523 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5524 status = decode_compound_hdr(&xdr, &hdr);
5525 if (status)
5526 goto out;
5527 status = decode_putfh(&xdr);
5528 if (status)
5529 goto out;
5530 status = decode_open_confirm(&xdr, res);
5531 out:
5532 return status;
5533 }
5534
5535 /*
5536 * Decode OPEN response
5537 */
5538 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5539 {
5540 struct xdr_stream xdr;
5541 struct compound_hdr hdr;
5542 int status;
5543
5544 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5545 status = decode_compound_hdr(&xdr, &hdr);
5546 if (status)
5547 goto out;
5548 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5549 if (status)
5550 goto out;
5551 status = decode_putfh(&xdr);
5552 if (status)
5553 goto out;
5554 status = decode_open(&xdr, res);
5555 if (status)
5556 goto out;
5557 decode_getfattr(&xdr, res->f_attr, res->server,
5558 !RPC_IS_ASYNC(rqstp->rq_task));
5559 out:
5560 return status;
5561 }
5562
5563 /*
5564 * Decode SETATTR response
5565 */
5566 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5567 {
5568 struct xdr_stream xdr;
5569 struct compound_hdr hdr;
5570 int status;
5571
5572 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5573 status = decode_compound_hdr(&xdr, &hdr);
5574 if (status)
5575 goto out;
5576 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5577 if (status)
5578 goto out;
5579 status = decode_putfh(&xdr);
5580 if (status)
5581 goto out;
5582 status = decode_setattr(&xdr);
5583 if (status)
5584 goto out;
5585 decode_getfattr(&xdr, res->fattr, res->server,
5586 !RPC_IS_ASYNC(rqstp->rq_task));
5587 out:
5588 return status;
5589 }
5590
5591 /*
5592 * Decode LOCK response
5593 */
5594 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5595 {
5596 struct xdr_stream xdr;
5597 struct compound_hdr hdr;
5598 int status;
5599
5600 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5601 status = decode_compound_hdr(&xdr, &hdr);
5602 if (status)
5603 goto out;
5604 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5605 if (status)
5606 goto out;
5607 status = decode_putfh(&xdr);
5608 if (status)
5609 goto out;
5610 status = decode_lock(&xdr, res);
5611 out:
5612 return status;
5613 }
5614
5615 /*
5616 * Decode LOCKT response
5617 */
5618 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5619 {
5620 struct xdr_stream xdr;
5621 struct compound_hdr hdr;
5622 int status;
5623
5624 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5625 status = decode_compound_hdr(&xdr, &hdr);
5626 if (status)
5627 goto out;
5628 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5629 if (status)
5630 goto out;
5631 status = decode_putfh(&xdr);
5632 if (status)
5633 goto out;
5634 status = decode_lockt(&xdr, res);
5635 out:
5636 return status;
5637 }
5638
5639 /*
5640 * Decode LOCKU response
5641 */
5642 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5643 {
5644 struct xdr_stream xdr;
5645 struct compound_hdr hdr;
5646 int status;
5647
5648 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5649 status = decode_compound_hdr(&xdr, &hdr);
5650 if (status)
5651 goto out;
5652 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5653 if (status)
5654 goto out;
5655 status = decode_putfh(&xdr);
5656 if (status)
5657 goto out;
5658 status = decode_locku(&xdr, res);
5659 out:
5660 return status;
5661 }
5662
5663 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5664 {
5665 struct xdr_stream xdr;
5666 struct compound_hdr hdr;
5667 int status;
5668
5669 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5670 status = decode_compound_hdr(&xdr, &hdr);
5671 if (!status)
5672 status = decode_release_lockowner(&xdr);
5673 return status;
5674 }
5675
5676 /*
5677 * Decode READLINK response
5678 */
5679 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5680 struct nfs4_readlink_res *res)
5681 {
5682 struct xdr_stream xdr;
5683 struct compound_hdr hdr;
5684 int status;
5685
5686 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5687 status = decode_compound_hdr(&xdr, &hdr);
5688 if (status)
5689 goto out;
5690 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5691 if (status)
5692 goto out;
5693 status = decode_putfh(&xdr);
5694 if (status)
5695 goto out;
5696 status = decode_readlink(&xdr, rqstp);
5697 out:
5698 return status;
5699 }
5700
5701 /*
5702 * Decode READDIR response
5703 */
5704 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5705 {
5706 struct xdr_stream xdr;
5707 struct compound_hdr hdr;
5708 int status;
5709
5710 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5711 status = decode_compound_hdr(&xdr, &hdr);
5712 if (status)
5713 goto out;
5714 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5715 if (status)
5716 goto out;
5717 status = decode_putfh(&xdr);
5718 if (status)
5719 goto out;
5720 status = decode_readdir(&xdr, rqstp, res);
5721 out:
5722 return status;
5723 }
5724
5725 /*
5726 * Decode Read response
5727 */
5728 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5729 {
5730 struct xdr_stream xdr;
5731 struct compound_hdr hdr;
5732 int status;
5733
5734 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5735 status = decode_compound_hdr(&xdr, &hdr);
5736 if (status)
5737 goto out;
5738 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5739 if (status)
5740 goto out;
5741 status = decode_putfh(&xdr);
5742 if (status)
5743 goto out;
5744 status = decode_read(&xdr, rqstp, res);
5745 if (!status)
5746 status = res->count;
5747 out:
5748 return status;
5749 }
5750
5751 /*
5752 * Decode WRITE response
5753 */
5754 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5755 {
5756 struct xdr_stream xdr;
5757 struct compound_hdr hdr;
5758 int status;
5759
5760 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5761 status = decode_compound_hdr(&xdr, &hdr);
5762 if (status)
5763 goto out;
5764 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5765 if (status)
5766 goto out;
5767 status = decode_putfh(&xdr);
5768 if (status)
5769 goto out;
5770 status = decode_write(&xdr, res);
5771 if (status)
5772 goto out;
5773 decode_getfattr(&xdr, res->fattr, res->server,
5774 !RPC_IS_ASYNC(rqstp->rq_task));
5775 if (!status)
5776 status = res->count;
5777 out:
5778 return status;
5779 }
5780
5781 /*
5782 * Decode COMMIT response
5783 */
5784 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5785 {
5786 struct xdr_stream xdr;
5787 struct compound_hdr hdr;
5788 int status;
5789
5790 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5791 status = decode_compound_hdr(&xdr, &hdr);
5792 if (status)
5793 goto out;
5794 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5795 if (status)
5796 goto out;
5797 status = decode_putfh(&xdr);
5798 if (status)
5799 goto out;
5800 status = decode_commit(&xdr, res);
5801 if (status)
5802 goto out;
5803 decode_getfattr(&xdr, res->fattr, res->server,
5804 !RPC_IS_ASYNC(rqstp->rq_task));
5805 out:
5806 return status;
5807 }
5808
5809 /*
5810 * Decode FSINFO response
5811 */
5812 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5813 struct nfs4_fsinfo_res *res)
5814 {
5815 struct xdr_stream xdr;
5816 struct compound_hdr hdr;
5817 int status;
5818
5819 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5820 status = decode_compound_hdr(&xdr, &hdr);
5821 if (!status)
5822 status = decode_sequence(&xdr, &res->seq_res, req);
5823 if (!status)
5824 status = decode_putfh(&xdr);
5825 if (!status)
5826 status = decode_fsinfo(&xdr, res->fsinfo);
5827 return status;
5828 }
5829
5830 /*
5831 * Decode PATHCONF response
5832 */
5833 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5834 struct nfs4_pathconf_res *res)
5835 {
5836 struct xdr_stream xdr;
5837 struct compound_hdr hdr;
5838 int status;
5839
5840 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5841 status = decode_compound_hdr(&xdr, &hdr);
5842 if (!status)
5843 status = decode_sequence(&xdr, &res->seq_res, req);
5844 if (!status)
5845 status = decode_putfh(&xdr);
5846 if (!status)
5847 status = decode_pathconf(&xdr, res->pathconf);
5848 return status;
5849 }
5850
5851 /*
5852 * Decode STATFS response
5853 */
5854 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5855 struct nfs4_statfs_res *res)
5856 {
5857 struct xdr_stream xdr;
5858 struct compound_hdr hdr;
5859 int status;
5860
5861 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5862 status = decode_compound_hdr(&xdr, &hdr);
5863 if (!status)
5864 status = decode_sequence(&xdr, &res->seq_res, req);
5865 if (!status)
5866 status = decode_putfh(&xdr);
5867 if (!status)
5868 status = decode_statfs(&xdr, res->fsstat);
5869 return status;
5870 }
5871
5872 /*
5873 * Decode GETATTR_BITMAP response
5874 */
5875 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5876 {
5877 struct xdr_stream xdr;
5878 struct compound_hdr hdr;
5879 int status;
5880
5881 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5882 status = decode_compound_hdr(&xdr, &hdr);
5883 if (status)
5884 goto out;
5885 status = decode_sequence(&xdr, &res->seq_res, req);
5886 if (status)
5887 goto out;
5888 if ((status = decode_putfh(&xdr)) != 0)
5889 goto out;
5890 status = decode_server_caps(&xdr, res);
5891 out:
5892 return status;
5893 }
5894
5895 /*
5896 * Decode RENEW response
5897 */
5898 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5899 {
5900 struct xdr_stream xdr;
5901 struct compound_hdr hdr;
5902 int status;
5903
5904 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5905 status = decode_compound_hdr(&xdr, &hdr);
5906 if (!status)
5907 status = decode_renew(&xdr);
5908 return status;
5909 }
5910
5911 /*
5912 * Decode SETCLIENTID response
5913 */
5914 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5915 struct nfs4_setclientid_res *res)
5916 {
5917 struct xdr_stream xdr;
5918 struct compound_hdr hdr;
5919 int status;
5920
5921 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5922 status = decode_compound_hdr(&xdr, &hdr);
5923 if (!status)
5924 status = decode_setclientid(&xdr, res);
5925 return status;
5926 }
5927
5928 /*
5929 * Decode SETCLIENTID_CONFIRM response
5930 */
5931 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5932 {
5933 struct xdr_stream xdr;
5934 struct compound_hdr hdr;
5935 int status;
5936
5937 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5938 status = decode_compound_hdr(&xdr, &hdr);
5939 if (!status)
5940 status = decode_setclientid_confirm(&xdr);
5941 if (!status)
5942 status = decode_putrootfh(&xdr);
5943 if (!status)
5944 status = decode_fsinfo(&xdr, fsinfo);
5945 return status;
5946 }
5947
5948 /*
5949 * Decode DELEGRETURN response
5950 */
5951 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5952 {
5953 struct xdr_stream xdr;
5954 struct compound_hdr hdr;
5955 int status;
5956
5957 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5958 status = decode_compound_hdr(&xdr, &hdr);
5959 if (status)
5960 goto out;
5961 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5962 if (status)
5963 goto out;
5964 status = decode_putfh(&xdr);
5965 if (status != 0)
5966 goto out;
5967 status = decode_delegreturn(&xdr);
5968 if (status != 0)
5969 goto out;
5970 decode_getfattr(&xdr, res->fattr, res->server,
5971 !RPC_IS_ASYNC(rqstp->rq_task));
5972 out:
5973 return status;
5974 }
5975
5976 /*
5977 * Decode FS_LOCATIONS response
5978 */
5979 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5980 struct nfs4_fs_locations_res *res)
5981 {
5982 struct xdr_stream xdr;
5983 struct compound_hdr hdr;
5984 int status;
5985
5986 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5987 status = decode_compound_hdr(&xdr, &hdr);
5988 if (status)
5989 goto out;
5990 status = decode_sequence(&xdr, &res->seq_res, req);
5991 if (status)
5992 goto out;
5993 if ((status = decode_putfh(&xdr)) != 0)
5994 goto out;
5995 if ((status = decode_lookup(&xdr)) != 0)
5996 goto out;
5997 xdr_enter_page(&xdr, PAGE_SIZE);
5998 status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5999 res->fs_locations->server,
6000 !RPC_IS_ASYNC(req->rq_task));
6001 out:
6002 return status;
6003 }
6004
6005 #if defined(CONFIG_NFS_V4_1)
6006 /*
6007 * Decode EXCHANGE_ID response
6008 */
6009 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
6010 void *res)
6011 {
6012 struct xdr_stream xdr;
6013 struct compound_hdr hdr;
6014 int status;
6015
6016 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6017 status = decode_compound_hdr(&xdr, &hdr);
6018 if (!status)
6019 status = decode_exchange_id(&xdr, res);
6020 return status;
6021 }
6022
6023 /*
6024 * Decode CREATE_SESSION response
6025 */
6026 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
6027 struct nfs41_create_session_res *res)
6028 {
6029 struct xdr_stream xdr;
6030 struct compound_hdr hdr;
6031 int status;
6032
6033 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6034 status = decode_compound_hdr(&xdr, &hdr);
6035 if (!status)
6036 status = decode_create_session(&xdr, res);
6037 return status;
6038 }
6039
6040 /*
6041 * Decode DESTROY_SESSION response
6042 */
6043 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
6044 void *dummy)
6045 {
6046 struct xdr_stream xdr;
6047 struct compound_hdr hdr;
6048 int status;
6049
6050 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6051 status = decode_compound_hdr(&xdr, &hdr);
6052 if (!status)
6053 status = decode_destroy_session(&xdr, dummy);
6054 return status;
6055 }
6056
6057 /*
6058 * Decode SEQUENCE response
6059 */
6060 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
6061 struct nfs4_sequence_res *res)
6062 {
6063 struct xdr_stream xdr;
6064 struct compound_hdr hdr;
6065 int status;
6066
6067 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6068 status = decode_compound_hdr(&xdr, &hdr);
6069 if (!status)
6070 status = decode_sequence(&xdr, res, rqstp);
6071 return status;
6072 }
6073
6074 /*
6075 * Decode GET_LEASE_TIME response
6076 */
6077 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
6078 struct nfs4_get_lease_time_res *res)
6079 {
6080 struct xdr_stream xdr;
6081 struct compound_hdr hdr;
6082 int status;
6083
6084 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6085 status = decode_compound_hdr(&xdr, &hdr);
6086 if (!status)
6087 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
6088 if (!status)
6089 status = decode_putrootfh(&xdr);
6090 if (!status)
6091 status = decode_fsinfo(&xdr, res->lr_fsinfo);
6092 return status;
6093 }
6094
6095 /*
6096 * Decode RECLAIM_COMPLETE response
6097 */
6098 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
6099 struct nfs41_reclaim_complete_res *res)
6100 {
6101 struct xdr_stream xdr;
6102 struct compound_hdr hdr;
6103 int status;
6104
6105 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6106 status = decode_compound_hdr(&xdr, &hdr);
6107 if (!status)
6108 status = decode_sequence(&xdr, &res->seq_res, rqstp);
6109 if (!status)
6110 status = decode_reclaim_complete(&xdr, (void *)NULL);
6111 return status;
6112 }
6113
6114 /*
6115 * Decode GETDEVINFO response
6116 */
6117 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, uint32_t *p,
6118 struct nfs4_getdeviceinfo_res *res)
6119 {
6120 struct xdr_stream xdr;
6121 struct compound_hdr hdr;
6122 int status;
6123
6124 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6125 status = decode_compound_hdr(&xdr, &hdr);
6126 if (status != 0)
6127 goto out;
6128 status = decode_sequence(&xdr, &res->seq_res, rqstp);
6129 if (status != 0)
6130 goto out;
6131 status = decode_getdeviceinfo(&xdr, res->pdev);
6132 out:
6133 return status;
6134 }
6135
6136 /*
6137 * Decode LAYOUTGET response
6138 */
6139 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, uint32_t *p,
6140 struct nfs4_layoutget_res *res)
6141 {
6142 struct xdr_stream xdr;
6143 struct compound_hdr hdr;
6144 int status;
6145
6146 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
6147 status = decode_compound_hdr(&xdr, &hdr);
6148 if (status)
6149 goto out;
6150 status = decode_sequence(&xdr, &res->seq_res, rqstp);
6151 if (status)
6152 goto out;
6153 status = decode_putfh(&xdr);
6154 if (status)
6155 goto out;
6156 status = decode_layoutget(&xdr, rqstp, res);
6157 out:
6158 return status;
6159 }
6160 #endif /* CONFIG_NFS_V4_1 */
6161
6162 __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6163 struct nfs_server *server, int plus)
6164 {
6165 uint32_t bitmap[2] = {0};
6166 uint32_t len;
6167 __be32 *p = xdr_inline_decode(xdr, 4);
6168 if (unlikely(!p))
6169 goto out_overflow;
6170 if (!ntohl(*p++)) {
6171 p = xdr_inline_decode(xdr, 4);
6172 if (unlikely(!p))
6173 goto out_overflow;
6174 if (!ntohl(*p++))
6175 return ERR_PTR(-EAGAIN);
6176 entry->eof = 1;
6177 return ERR_PTR(-EBADCOOKIE);
6178 }
6179
6180 p = xdr_inline_decode(xdr, 12);
6181 if (unlikely(!p))
6182 goto out_overflow;
6183 entry->prev_cookie = entry->cookie;
6184 p = xdr_decode_hyper(p, &entry->cookie);
6185 entry->len = ntohl(*p++);
6186
6187 p = xdr_inline_decode(xdr, entry->len);
6188 if (unlikely(!p))
6189 goto out_overflow;
6190 entry->name = (const char *) p;
6191
6192 /*
6193 * In case the server doesn't return an inode number,
6194 * we fake one here. (We don't use inode number 0,
6195 * since glibc seems to choke on it...)
6196 */
6197 entry->ino = 1;
6198 entry->fattr->valid = 0;
6199
6200 if (decode_attr_bitmap(xdr, bitmap) < 0)
6201 goto out_overflow;
6202
6203 if (decode_attr_length(xdr, &len, &p) < 0)
6204 goto out_overflow;
6205
6206 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
6207 goto out_overflow;
6208 if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6209 entry->ino = entry->fattr->fileid;
6210
6211 if (verify_attr_len(xdr, p, len) < 0)
6212 goto out_overflow;
6213
6214 p = xdr_inline_peek(xdr, 8);
6215 if (p != NULL)
6216 entry->eof = !p[0] && p[1];
6217 else
6218 entry->eof = 0;
6219
6220 return p;
6221
6222 out_overflow:
6223 print_overflow_msg(__func__, xdr);
6224 return ERR_PTR(-EIO);
6225 }
6226
6227 /*
6228 * We need to translate between nfs status return values and
6229 * the local errno values which may not be the same.
6230 */
6231 static struct {
6232 int stat;
6233 int errno;
6234 } nfs_errtbl[] = {
6235 { NFS4_OK, 0 },
6236 { NFS4ERR_PERM, -EPERM },
6237 { NFS4ERR_NOENT, -ENOENT },
6238 { NFS4ERR_IO, -errno_NFSERR_IO},
6239 { NFS4ERR_NXIO, -ENXIO },
6240 { NFS4ERR_ACCESS, -EACCES },
6241 { NFS4ERR_EXIST, -EEXIST },
6242 { NFS4ERR_XDEV, -EXDEV },
6243 { NFS4ERR_NOTDIR, -ENOTDIR },
6244 { NFS4ERR_ISDIR, -EISDIR },
6245 { NFS4ERR_INVAL, -EINVAL },
6246 { NFS4ERR_FBIG, -EFBIG },
6247 { NFS4ERR_NOSPC, -ENOSPC },
6248 { NFS4ERR_ROFS, -EROFS },
6249 { NFS4ERR_MLINK, -EMLINK },
6250 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
6251 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
6252 { NFS4ERR_DQUOT, -EDQUOT },
6253 { NFS4ERR_STALE, -ESTALE },
6254 { NFS4ERR_BADHANDLE, -EBADHANDLE },
6255 { NFS4ERR_BADOWNER, -EINVAL },
6256 { NFS4ERR_BADNAME, -EINVAL },
6257 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
6258 { NFS4ERR_NOTSUPP, -ENOTSUPP },
6259 { NFS4ERR_TOOSMALL, -ETOOSMALL },
6260 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
6261 { NFS4ERR_BADTYPE, -EBADTYPE },
6262 { NFS4ERR_LOCKED, -EAGAIN },
6263 { NFS4ERR_SYMLINK, -ELOOP },
6264 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
6265 { NFS4ERR_DEADLOCK, -EDEADLK },
6266 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
6267 * to be handled by a
6268 * middle-layer.
6269 */
6270 { -1, -EIO }
6271 };
6272
6273 /*
6274 * Convert an NFS error code to a local one.
6275 * This one is used jointly by NFSv2 and NFSv3.
6276 */
6277 static int
6278 nfs4_stat_to_errno(int stat)
6279 {
6280 int i;
6281 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6282 if (nfs_errtbl[i].stat == stat)
6283 return nfs_errtbl[i].errno;
6284 }
6285 if (stat <= 10000 || stat > 10100) {
6286 /* The server is looney tunes. */
6287 return -EREMOTEIO;
6288 }
6289 /* If we cannot translate the error, the recovery routines should
6290 * handle it.
6291 * Note: remaining NFSv4 error codes have values > 10000, so should
6292 * not conflict with native Linux error codes.
6293 */
6294 return -stat;
6295 }
6296
6297 #define PROC(proc, argtype, restype) \
6298 [NFSPROC4_CLNT_##proc] = { \
6299 .p_proc = NFSPROC4_COMPOUND, \
6300 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
6301 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
6302 .p_arglen = NFS4_##argtype##_sz, \
6303 .p_replen = NFS4_##restype##_sz, \
6304 .p_statidx = NFSPROC4_CLNT_##proc, \
6305 .p_name = #proc, \
6306 }
6307
6308 struct rpc_procinfo nfs4_procedures[] = {
6309 PROC(READ, enc_read, dec_read),
6310 PROC(WRITE, enc_write, dec_write),
6311 PROC(COMMIT, enc_commit, dec_commit),
6312 PROC(OPEN, enc_open, dec_open),
6313 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
6314 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
6315 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
6316 PROC(CLOSE, enc_close, dec_close),
6317 PROC(SETATTR, enc_setattr, dec_setattr),
6318 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
6319 PROC(RENEW, enc_renew, dec_renew),
6320 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
6321 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6322 PROC(LOCK, enc_lock, dec_lock),
6323 PROC(LOCKT, enc_lockt, dec_lockt),
6324 PROC(LOCKU, enc_locku, dec_locku),
6325 PROC(ACCESS, enc_access, dec_access),
6326 PROC(GETATTR, enc_getattr, dec_getattr),
6327 PROC(LOOKUP, enc_lookup, dec_lookup),
6328 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
6329 PROC(REMOVE, enc_remove, dec_remove),
6330 PROC(RENAME, enc_rename, dec_rename),
6331 PROC(LINK, enc_link, dec_link),
6332 PROC(SYMLINK, enc_symlink, dec_symlink),
6333 PROC(CREATE, enc_create, dec_create),
6334 PROC(PATHCONF, enc_pathconf, dec_pathconf),
6335 PROC(STATFS, enc_statfs, dec_statfs),
6336 PROC(READLINK, enc_readlink, dec_readlink),
6337 PROC(READDIR, enc_readdir, dec_readdir),
6338 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
6339 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
6340 PROC(GETACL, enc_getacl, dec_getacl),
6341 PROC(SETACL, enc_setacl, dec_setacl),
6342 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
6343 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
6344 #if defined(CONFIG_NFS_V4_1)
6345 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
6346 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
6347 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
6348 PROC(SEQUENCE, enc_sequence, dec_sequence),
6349 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
6350 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
6351 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
6352 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
6353 #endif /* CONFIG_NFS_V4_1 */
6354 };
6355
6356 struct rpc_version nfs_version4 = {
6357 .number = 4,
6358 .nrprocs = ARRAY_SIZE(nfs4_procedures),
6359 .procs = nfs4_procedures
6360 };
6361
6362 /*
6363 * Local variables:
6364 * c-basic-offset: 8
6365 * End:
6366 */
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