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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux...
[mirror_ubuntu-jammy-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/nfs.h>
50 #include <linux/nfs4.h>
51 #include <linux/nfs_fs.h>
52 #include <linux/nfs_idmap.h>
53 #include "nfs4_fs.h"
54 #include "internal.h"
55 #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 + 1 + 4)
75 #define lock_owner_id_maxsz (1 + 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, 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, 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, 32);
1092 p = xdr_encode_hyper(p, lowner->clientid);
1093 *p++ = cpu_to_be32(20);
1094 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1095 *p++ = cpu_to_be32(lowner->s_dev);
1096 xdr_encode_hyper(p, lowner->id);
1097 }
1098
1099 /*
1100 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1101 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1102 */
1103 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1104 {
1105 __be32 *p;
1106
1107 p = reserve_space(xdr, 32);
1108 *p++ = cpu_to_be32(OP_LOCK);
1109 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1110 *p++ = cpu_to_be32(args->reclaim);
1111 p = xdr_encode_hyper(p, args->fl->fl_start);
1112 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1113 *p = cpu_to_be32(args->new_lock_owner);
1114 if (args->new_lock_owner){
1115 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1116 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1117 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1118 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1119 encode_lockowner(xdr, &args->lock_owner);
1120 }
1121 else {
1122 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1123 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1124 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1125 }
1126 hdr->nops++;
1127 hdr->replen += decode_lock_maxsz;
1128 }
1129
1130 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1131 {
1132 __be32 *p;
1133
1134 p = reserve_space(xdr, 24);
1135 *p++ = cpu_to_be32(OP_LOCKT);
1136 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1137 p = xdr_encode_hyper(p, args->fl->fl_start);
1138 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1139 encode_lockowner(xdr, &args->lock_owner);
1140 hdr->nops++;
1141 hdr->replen += decode_lockt_maxsz;
1142 }
1143
1144 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1145 {
1146 __be32 *p;
1147
1148 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1149 *p++ = cpu_to_be32(OP_LOCKU);
1150 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1151 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1152 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1153 p = xdr_encode_hyper(p, args->fl->fl_start);
1154 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1155 hdr->nops++;
1156 hdr->replen += decode_locku_maxsz;
1157 }
1158
1159 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1160 {
1161 __be32 *p;
1162
1163 p = reserve_space(xdr, 4);
1164 *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1165 encode_lockowner(xdr, lowner);
1166 hdr->nops++;
1167 hdr->replen += decode_release_lockowner_maxsz;
1168 }
1169
1170 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1171 {
1172 int len = name->len;
1173 __be32 *p;
1174
1175 p = reserve_space(xdr, 8 + len);
1176 *p++ = cpu_to_be32(OP_LOOKUP);
1177 xdr_encode_opaque(p, name->name, len);
1178 hdr->nops++;
1179 hdr->replen += decode_lookup_maxsz;
1180 }
1181
1182 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1183 {
1184 __be32 *p;
1185
1186 p = reserve_space(xdr, 8);
1187 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1188 case FMODE_READ:
1189 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1190 break;
1191 case FMODE_WRITE:
1192 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1193 break;
1194 case FMODE_READ|FMODE_WRITE:
1195 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1196 break;
1197 default:
1198 *p++ = cpu_to_be32(0);
1199 }
1200 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1201 }
1202
1203 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1204 {
1205 __be32 *p;
1206 /*
1207 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1208 * owner 4 = 32
1209 */
1210 p = reserve_space(xdr, 8);
1211 *p++ = cpu_to_be32(OP_OPEN);
1212 *p = cpu_to_be32(arg->seqid->sequence->counter);
1213 encode_share_access(xdr, arg->fmode);
1214 p = reserve_space(xdr, 32);
1215 p = xdr_encode_hyper(p, arg->clientid);
1216 *p++ = cpu_to_be32(20);
1217 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1218 *p++ = cpu_to_be32(arg->server->s_dev);
1219 xdr_encode_hyper(p, arg->id);
1220 }
1221
1222 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1223 {
1224 __be32 *p;
1225 struct nfs_client *clp;
1226
1227 p = reserve_space(xdr, 4);
1228 switch(arg->open_flags & O_EXCL) {
1229 case 0:
1230 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1231 encode_attrs(xdr, arg->u.attrs, arg->server);
1232 break;
1233 default:
1234 clp = arg->server->nfs_client;
1235 if (clp->cl_mvops->minor_version > 0) {
1236 if (nfs4_has_persistent_session(clp)) {
1237 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1238 encode_attrs(xdr, arg->u.attrs, arg->server);
1239 } else {
1240 struct iattr dummy;
1241
1242 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1243 encode_nfs4_verifier(xdr, &arg->u.verifier);
1244 dummy.ia_valid = 0;
1245 encode_attrs(xdr, &dummy, arg->server);
1246 }
1247 } else {
1248 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1249 encode_nfs4_verifier(xdr, &arg->u.verifier);
1250 }
1251 }
1252 }
1253
1254 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1255 {
1256 __be32 *p;
1257
1258 p = reserve_space(xdr, 4);
1259 switch (arg->open_flags & O_CREAT) {
1260 case 0:
1261 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1262 break;
1263 default:
1264 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1265 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1266 encode_createmode(xdr, arg);
1267 }
1268 }
1269
1270 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1271 {
1272 __be32 *p;
1273
1274 p = reserve_space(xdr, 4);
1275 switch (delegation_type) {
1276 case 0:
1277 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1278 break;
1279 case FMODE_READ:
1280 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1281 break;
1282 case FMODE_WRITE|FMODE_READ:
1283 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1284 break;
1285 default:
1286 BUG();
1287 }
1288 }
1289
1290 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1291 {
1292 __be32 *p;
1293
1294 p = reserve_space(xdr, 4);
1295 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1296 encode_string(xdr, name->len, name->name);
1297 }
1298
1299 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1300 {
1301 __be32 *p;
1302
1303 p = reserve_space(xdr, 4);
1304 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1305 encode_delegation_type(xdr, type);
1306 }
1307
1308 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1309 {
1310 __be32 *p;
1311
1312 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1313 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1314 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1315 encode_string(xdr, name->len, name->name);
1316 }
1317
1318 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1319 {
1320 encode_openhdr(xdr, arg);
1321 encode_opentype(xdr, arg);
1322 switch (arg->claim) {
1323 case NFS4_OPEN_CLAIM_NULL:
1324 encode_claim_null(xdr, arg->name);
1325 break;
1326 case NFS4_OPEN_CLAIM_PREVIOUS:
1327 encode_claim_previous(xdr, arg->u.delegation_type);
1328 break;
1329 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1330 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1331 break;
1332 default:
1333 BUG();
1334 }
1335 hdr->nops++;
1336 hdr->replen += decode_open_maxsz;
1337 }
1338
1339 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1340 {
1341 __be32 *p;
1342
1343 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1344 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1345 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1346 *p = cpu_to_be32(arg->seqid->sequence->counter);
1347 hdr->nops++;
1348 hdr->replen += decode_open_confirm_maxsz;
1349 }
1350
1351 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1352 {
1353 __be32 *p;
1354
1355 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1356 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1357 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1358 *p = cpu_to_be32(arg->seqid->sequence->counter);
1359 encode_share_access(xdr, arg->fmode);
1360 hdr->nops++;
1361 hdr->replen += decode_open_downgrade_maxsz;
1362 }
1363
1364 static void
1365 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1366 {
1367 int len = fh->size;
1368 __be32 *p;
1369
1370 p = reserve_space(xdr, 8 + len);
1371 *p++ = cpu_to_be32(OP_PUTFH);
1372 xdr_encode_opaque(p, fh->data, len);
1373 hdr->nops++;
1374 hdr->replen += decode_putfh_maxsz;
1375 }
1376
1377 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1378 {
1379 __be32 *p;
1380
1381 p = reserve_space(xdr, 4);
1382 *p = cpu_to_be32(OP_PUTROOTFH);
1383 hdr->nops++;
1384 hdr->replen += decode_putrootfh_maxsz;
1385 }
1386
1387 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1388 {
1389 nfs4_stateid stateid;
1390 __be32 *p;
1391
1392 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1393 if (ctx->state != NULL) {
1394 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1395 if (zero_seqid)
1396 stateid.stateid.seqid = 0;
1397 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1398 } else
1399 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1400 }
1401
1402 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1403 {
1404 __be32 *p;
1405
1406 p = reserve_space(xdr, 4);
1407 *p = cpu_to_be32(OP_READ);
1408
1409 encode_stateid(xdr, args->context, args->lock_context,
1410 hdr->minorversion);
1411
1412 p = reserve_space(xdr, 12);
1413 p = xdr_encode_hyper(p, args->offset);
1414 *p = cpu_to_be32(args->count);
1415 hdr->nops++;
1416 hdr->replen += decode_read_maxsz;
1417 }
1418
1419 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1420 {
1421 uint32_t attrs[2] = {0, 0};
1422 uint32_t dircount = readdir->count >> 1;
1423 __be32 *p;
1424
1425 if (readdir->plus) {
1426 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1427 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1428 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1429 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1430 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1431 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1432 dircount >>= 1;
1433 }
1434 attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1435 attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1436 /* Switch to mounted_on_fileid if the server supports it */
1437 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1438 attrs[0] &= ~FATTR4_WORD0_FILEID;
1439 else
1440 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1441
1442 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1443 *p++ = cpu_to_be32(OP_READDIR);
1444 p = xdr_encode_hyper(p, readdir->cookie);
1445 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1446 *p++ = cpu_to_be32(dircount);
1447 *p++ = cpu_to_be32(readdir->count);
1448 *p++ = cpu_to_be32(2);
1449
1450 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1451 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1452 hdr->nops++;
1453 hdr->replen += decode_readdir_maxsz;
1454 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1455 __func__,
1456 (unsigned long long)readdir->cookie,
1457 ((u32 *)readdir->verifier.data)[0],
1458 ((u32 *)readdir->verifier.data)[1],
1459 attrs[0] & readdir->bitmask[0],
1460 attrs[1] & readdir->bitmask[1]);
1461 }
1462
1463 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1464 {
1465 __be32 *p;
1466
1467 p = reserve_space(xdr, 4);
1468 *p = cpu_to_be32(OP_READLINK);
1469 hdr->nops++;
1470 hdr->replen += decode_readlink_maxsz;
1471 }
1472
1473 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1474 {
1475 __be32 *p;
1476
1477 p = reserve_space(xdr, 8 + name->len);
1478 *p++ = cpu_to_be32(OP_REMOVE);
1479 xdr_encode_opaque(p, name->name, name->len);
1480 hdr->nops++;
1481 hdr->replen += decode_remove_maxsz;
1482 }
1483
1484 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1485 {
1486 __be32 *p;
1487
1488 p = reserve_space(xdr, 4);
1489 *p = cpu_to_be32(OP_RENAME);
1490 encode_string(xdr, oldname->len, oldname->name);
1491 encode_string(xdr, newname->len, newname->name);
1492 hdr->nops++;
1493 hdr->replen += decode_rename_maxsz;
1494 }
1495
1496 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1497 {
1498 __be32 *p;
1499
1500 p = reserve_space(xdr, 12);
1501 *p++ = cpu_to_be32(OP_RENEW);
1502 xdr_encode_hyper(p, client_stateid->cl_clientid);
1503 hdr->nops++;
1504 hdr->replen += decode_renew_maxsz;
1505 }
1506
1507 static void
1508 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1509 {
1510 __be32 *p;
1511
1512 p = reserve_space(xdr, 4);
1513 *p = cpu_to_be32(OP_RESTOREFH);
1514 hdr->nops++;
1515 hdr->replen += decode_restorefh_maxsz;
1516 }
1517
1518 static void
1519 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1520 {
1521 __be32 *p;
1522
1523 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1524 *p++ = cpu_to_be32(OP_SETATTR);
1525 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1526 p = reserve_space(xdr, 2*4);
1527 *p++ = cpu_to_be32(1);
1528 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1529 BUG_ON(arg->acl_len % 4);
1530 p = reserve_space(xdr, 4);
1531 *p = cpu_to_be32(arg->acl_len);
1532 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1533 hdr->nops++;
1534 hdr->replen += decode_setacl_maxsz;
1535 }
1536
1537 static void
1538 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1539 {
1540 __be32 *p;
1541
1542 p = reserve_space(xdr, 4);
1543 *p = cpu_to_be32(OP_SAVEFH);
1544 hdr->nops++;
1545 hdr->replen += decode_savefh_maxsz;
1546 }
1547
1548 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1549 {
1550 __be32 *p;
1551
1552 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1553 *p++ = cpu_to_be32(OP_SETATTR);
1554 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1555 hdr->nops++;
1556 hdr->replen += decode_setattr_maxsz;
1557 encode_attrs(xdr, arg->iap, server);
1558 }
1559
1560 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1561 {
1562 __be32 *p;
1563
1564 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1565 *p++ = cpu_to_be32(OP_SETCLIENTID);
1566 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1567
1568 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1569 p = reserve_space(xdr, 4);
1570 *p = cpu_to_be32(setclientid->sc_prog);
1571 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1572 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1573 p = reserve_space(xdr, 4);
1574 *p = cpu_to_be32(setclientid->sc_cb_ident);
1575 hdr->nops++;
1576 hdr->replen += decode_setclientid_maxsz;
1577 }
1578
1579 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1580 {
1581 __be32 *p;
1582
1583 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1584 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1585 p = xdr_encode_hyper(p, arg->clientid);
1586 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1587 hdr->nops++;
1588 hdr->replen += decode_setclientid_confirm_maxsz;
1589 }
1590
1591 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1592 {
1593 __be32 *p;
1594
1595 p = reserve_space(xdr, 4);
1596 *p = cpu_to_be32(OP_WRITE);
1597
1598 encode_stateid(xdr, args->context, args->lock_context,
1599 hdr->minorversion);
1600
1601 p = reserve_space(xdr, 16);
1602 p = xdr_encode_hyper(p, args->offset);
1603 *p++ = cpu_to_be32(args->stable);
1604 *p = cpu_to_be32(args->count);
1605
1606 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1607 hdr->nops++;
1608 hdr->replen += decode_write_maxsz;
1609 }
1610
1611 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1612 {
1613 __be32 *p;
1614
1615 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1616
1617 *p++ = cpu_to_be32(OP_DELEGRETURN);
1618 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1619 hdr->nops++;
1620 hdr->replen += decode_delegreturn_maxsz;
1621 }
1622
1623 #if defined(CONFIG_NFS_V4_1)
1624 /* NFSv4.1 operations */
1625 static void encode_exchange_id(struct xdr_stream *xdr,
1626 struct nfs41_exchange_id_args *args,
1627 struct compound_hdr *hdr)
1628 {
1629 __be32 *p;
1630
1631 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1632 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1633 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1634
1635 encode_string(xdr, args->id_len, args->id);
1636
1637 p = reserve_space(xdr, 12);
1638 *p++ = cpu_to_be32(args->flags);
1639 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1640 *p = cpu_to_be32(0); /* zero length implementation id array */
1641 hdr->nops++;
1642 hdr->replen += decode_exchange_id_maxsz;
1643 }
1644
1645 static void encode_create_session(struct xdr_stream *xdr,
1646 struct nfs41_create_session_args *args,
1647 struct compound_hdr *hdr)
1648 {
1649 __be32 *p;
1650 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1651 uint32_t len;
1652 struct nfs_client *clp = args->client;
1653 u32 max_resp_sz_cached;
1654
1655 /*
1656 * Assumes OPEN is the biggest non-idempotent compound.
1657 * 2 is the verifier.
1658 */
1659 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1660 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1661
1662 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1663 clp->cl_ipaddr);
1664
1665 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1666 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1667 p = xdr_encode_hyper(p, clp->cl_clientid);
1668 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1669 *p++ = cpu_to_be32(args->flags); /*flags */
1670
1671 /* Fore Channel */
1672 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1673 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1674 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1675 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1676 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1677 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1678 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1679
1680 /* Back Channel */
1681 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1682 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1683 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1684 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1685 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1686 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1687 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1688
1689 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1690 *p++ = cpu_to_be32(1);
1691 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1692
1693 /* authsys_parms rfc1831 */
1694 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1695 p = xdr_encode_opaque(p, machine_name, len);
1696 *p++ = cpu_to_be32(0); /* UID */
1697 *p++ = cpu_to_be32(0); /* GID */
1698 *p = cpu_to_be32(0); /* No more gids */
1699 hdr->nops++;
1700 hdr->replen += decode_create_session_maxsz;
1701 }
1702
1703 static void encode_destroy_session(struct xdr_stream *xdr,
1704 struct nfs4_session *session,
1705 struct compound_hdr *hdr)
1706 {
1707 __be32 *p;
1708 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1709 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1710 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1711 hdr->nops++;
1712 hdr->replen += decode_destroy_session_maxsz;
1713 }
1714
1715 static void encode_reclaim_complete(struct xdr_stream *xdr,
1716 struct nfs41_reclaim_complete_args *args,
1717 struct compound_hdr *hdr)
1718 {
1719 __be32 *p;
1720
1721 p = reserve_space(xdr, 8);
1722 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1723 *p++ = cpu_to_be32(args->one_fs);
1724 hdr->nops++;
1725 hdr->replen += decode_reclaim_complete_maxsz;
1726 }
1727 #endif /* CONFIG_NFS_V4_1 */
1728
1729 static void encode_sequence(struct xdr_stream *xdr,
1730 const struct nfs4_sequence_args *args,
1731 struct compound_hdr *hdr)
1732 {
1733 #if defined(CONFIG_NFS_V4_1)
1734 struct nfs4_session *session = args->sa_session;
1735 struct nfs4_slot_table *tp;
1736 struct nfs4_slot *slot;
1737 __be32 *p;
1738
1739 if (!session)
1740 return;
1741
1742 tp = &session->fc_slot_table;
1743
1744 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1745 slot = tp->slots + args->sa_slotid;
1746
1747 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1748 *p++ = cpu_to_be32(OP_SEQUENCE);
1749
1750 /*
1751 * Sessionid + seqid + slotid + max slotid + cache_this
1752 */
1753 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1754 "max_slotid=%d cache_this=%d\n",
1755 __func__,
1756 ((u32 *)session->sess_id.data)[0],
1757 ((u32 *)session->sess_id.data)[1],
1758 ((u32 *)session->sess_id.data)[2],
1759 ((u32 *)session->sess_id.data)[3],
1760 slot->seq_nr, args->sa_slotid,
1761 tp->highest_used_slotid, args->sa_cache_this);
1762 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1763 *p++ = cpu_to_be32(slot->seq_nr);
1764 *p++ = cpu_to_be32(args->sa_slotid);
1765 *p++ = cpu_to_be32(tp->highest_used_slotid);
1766 *p = cpu_to_be32(args->sa_cache_this);
1767 hdr->nops++;
1768 hdr->replen += decode_sequence_maxsz;
1769 #endif /* CONFIG_NFS_V4_1 */
1770 }
1771
1772 #ifdef CONFIG_NFS_V4_1
1773 static void
1774 encode_getdeviceinfo(struct xdr_stream *xdr,
1775 const struct nfs4_getdeviceinfo_args *args,
1776 struct compound_hdr *hdr)
1777 {
1778 __be32 *p;
1779
1780 p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1781 *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1782 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1783 NFS4_DEVICEID4_SIZE);
1784 *p++ = cpu_to_be32(args->pdev->layout_type);
1785 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1786 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1787 hdr->nops++;
1788 hdr->replen += decode_getdeviceinfo_maxsz;
1789 }
1790
1791 static void
1792 encode_layoutget(struct xdr_stream *xdr,
1793 const struct nfs4_layoutget_args *args,
1794 struct compound_hdr *hdr)
1795 {
1796 __be32 *p;
1797
1798 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1799 *p++ = cpu_to_be32(OP_LAYOUTGET);
1800 *p++ = cpu_to_be32(0); /* Signal layout available */
1801 *p++ = cpu_to_be32(args->type);
1802 *p++ = cpu_to_be32(args->range.iomode);
1803 p = xdr_encode_hyper(p, args->range.offset);
1804 p = xdr_encode_hyper(p, args->range.length);
1805 p = xdr_encode_hyper(p, args->minlength);
1806 p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1807 *p = cpu_to_be32(args->maxcount);
1808
1809 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1810 __func__,
1811 args->type,
1812 args->range.iomode,
1813 (unsigned long)args->range.offset,
1814 (unsigned long)args->range.length,
1815 args->maxcount);
1816 hdr->nops++;
1817 hdr->replen += decode_layoutget_maxsz;
1818 }
1819 #endif /* CONFIG_NFS_V4_1 */
1820
1821 /*
1822 * END OF "GENERIC" ENCODE ROUTINES.
1823 */
1824
1825 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1826 {
1827 #if defined(CONFIG_NFS_V4_1)
1828 if (args->sa_session)
1829 return args->sa_session->clp->cl_mvops->minor_version;
1830 #endif /* CONFIG_NFS_V4_1 */
1831 return 0;
1832 }
1833
1834 /*
1835 * Encode an ACCESS request
1836 */
1837 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1838 const struct nfs4_accessargs *args)
1839 {
1840 struct compound_hdr hdr = {
1841 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842 };
1843
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 }
1851
1852 /*
1853 * Encode LOOKUP request
1854 */
1855 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1856 const struct nfs4_lookup_arg *args)
1857 {
1858 struct compound_hdr hdr = {
1859 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1860 };
1861
1862 encode_compound_hdr(xdr, req, &hdr);
1863 encode_sequence(xdr, &args->seq_args, &hdr);
1864 encode_putfh(xdr, args->dir_fh, &hdr);
1865 encode_lookup(xdr, args->name, &hdr);
1866 encode_getfh(xdr, &hdr);
1867 encode_getfattr(xdr, args->bitmask, &hdr);
1868 encode_nops(&hdr);
1869 }
1870
1871 /*
1872 * Encode LOOKUP_ROOT request
1873 */
1874 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1875 struct xdr_stream *xdr,
1876 const struct nfs4_lookup_root_arg *args)
1877 {
1878 struct compound_hdr hdr = {
1879 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1880 };
1881
1882 encode_compound_hdr(xdr, req, &hdr);
1883 encode_sequence(xdr, &args->seq_args, &hdr);
1884 encode_putrootfh(xdr, &hdr);
1885 encode_getfh(xdr, &hdr);
1886 encode_getfattr(xdr, args->bitmask, &hdr);
1887 encode_nops(&hdr);
1888 }
1889
1890 /*
1891 * Encode REMOVE request
1892 */
1893 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1894 const struct nfs_removeargs *args)
1895 {
1896 struct compound_hdr hdr = {
1897 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1898 };
1899
1900 encode_compound_hdr(xdr, req, &hdr);
1901 encode_sequence(xdr, &args->seq_args, &hdr);
1902 encode_putfh(xdr, args->fh, &hdr);
1903 encode_remove(xdr, &args->name, &hdr);
1904 encode_getfattr(xdr, args->bitmask, &hdr);
1905 encode_nops(&hdr);
1906 }
1907
1908 /*
1909 * Encode RENAME request
1910 */
1911 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1912 const struct nfs_renameargs *args)
1913 {
1914 struct compound_hdr hdr = {
1915 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1916 };
1917
1918 encode_compound_hdr(xdr, req, &hdr);
1919 encode_sequence(xdr, &args->seq_args, &hdr);
1920 encode_putfh(xdr, args->old_dir, &hdr);
1921 encode_savefh(xdr, &hdr);
1922 encode_putfh(xdr, args->new_dir, &hdr);
1923 encode_rename(xdr, args->old_name, args->new_name, &hdr);
1924 encode_getfattr(xdr, args->bitmask, &hdr);
1925 encode_restorefh(xdr, &hdr);
1926 encode_getfattr(xdr, args->bitmask, &hdr);
1927 encode_nops(&hdr);
1928 }
1929
1930 /*
1931 * Encode LINK request
1932 */
1933 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
1934 const struct nfs4_link_arg *args)
1935 {
1936 struct compound_hdr hdr = {
1937 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1938 };
1939
1940 encode_compound_hdr(xdr, req, &hdr);
1941 encode_sequence(xdr, &args->seq_args, &hdr);
1942 encode_putfh(xdr, args->fh, &hdr);
1943 encode_savefh(xdr, &hdr);
1944 encode_putfh(xdr, args->dir_fh, &hdr);
1945 encode_link(xdr, args->name, &hdr);
1946 encode_getfattr(xdr, args->bitmask, &hdr);
1947 encode_restorefh(xdr, &hdr);
1948 encode_getfattr(xdr, args->bitmask, &hdr);
1949 encode_nops(&hdr);
1950 }
1951
1952 /*
1953 * Encode CREATE request
1954 */
1955 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
1956 const struct nfs4_create_arg *args)
1957 {
1958 struct compound_hdr hdr = {
1959 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1960 };
1961
1962 encode_compound_hdr(xdr, req, &hdr);
1963 encode_sequence(xdr, &args->seq_args, &hdr);
1964 encode_putfh(xdr, args->dir_fh, &hdr);
1965 encode_savefh(xdr, &hdr);
1966 encode_create(xdr, args, &hdr);
1967 encode_getfh(xdr, &hdr);
1968 encode_getfattr(xdr, args->bitmask, &hdr);
1969 encode_restorefh(xdr, &hdr);
1970 encode_getfattr(xdr, args->bitmask, &hdr);
1971 encode_nops(&hdr);
1972 }
1973
1974 /*
1975 * Encode SYMLINK request
1976 */
1977 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
1978 const struct nfs4_create_arg *args)
1979 {
1980 nfs4_xdr_enc_create(req, xdr, args);
1981 }
1982
1983 /*
1984 * Encode GETATTR request
1985 */
1986 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
1987 const struct nfs4_getattr_arg *args)
1988 {
1989 struct compound_hdr hdr = {
1990 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1991 };
1992
1993 encode_compound_hdr(xdr, req, &hdr);
1994 encode_sequence(xdr, &args->seq_args, &hdr);
1995 encode_putfh(xdr, args->fh, &hdr);
1996 encode_getfattr(xdr, args->bitmask, &hdr);
1997 encode_nops(&hdr);
1998 }
1999
2000 /*
2001 * Encode a CLOSE request
2002 */
2003 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2004 struct nfs_closeargs *args)
2005 {
2006 struct compound_hdr hdr = {
2007 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2008 };
2009
2010 encode_compound_hdr(xdr, req, &hdr);
2011 encode_sequence(xdr, &args->seq_args, &hdr);
2012 encode_putfh(xdr, args->fh, &hdr);
2013 encode_close(xdr, args, &hdr);
2014 encode_getfattr(xdr, args->bitmask, &hdr);
2015 encode_nops(&hdr);
2016 }
2017
2018 /*
2019 * Encode an OPEN request
2020 */
2021 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2022 struct nfs_openargs *args)
2023 {
2024 struct compound_hdr hdr = {
2025 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2026 };
2027
2028 encode_compound_hdr(xdr, req, &hdr);
2029 encode_sequence(xdr, &args->seq_args, &hdr);
2030 encode_putfh(xdr, args->fh, &hdr);
2031 encode_savefh(xdr, &hdr);
2032 encode_open(xdr, args, &hdr);
2033 encode_getfh(xdr, &hdr);
2034 encode_getfattr(xdr, args->bitmask, &hdr);
2035 encode_restorefh(xdr, &hdr);
2036 encode_getfattr(xdr, args->bitmask, &hdr);
2037 encode_nops(&hdr);
2038 }
2039
2040 /*
2041 * Encode an OPEN_CONFIRM request
2042 */
2043 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2044 struct xdr_stream *xdr,
2045 struct nfs_open_confirmargs *args)
2046 {
2047 struct compound_hdr hdr = {
2048 .nops = 0,
2049 };
2050
2051 encode_compound_hdr(xdr, req, &hdr);
2052 encode_putfh(xdr, args->fh, &hdr);
2053 encode_open_confirm(xdr, args, &hdr);
2054 encode_nops(&hdr);
2055 }
2056
2057 /*
2058 * Encode an OPEN request with no attributes.
2059 */
2060 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2061 struct xdr_stream *xdr,
2062 struct nfs_openargs *args)
2063 {
2064 struct compound_hdr hdr = {
2065 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2066 };
2067
2068 encode_compound_hdr(xdr, req, &hdr);
2069 encode_sequence(xdr, &args->seq_args, &hdr);
2070 encode_putfh(xdr, args->fh, &hdr);
2071 encode_open(xdr, args, &hdr);
2072 encode_getfattr(xdr, args->bitmask, &hdr);
2073 encode_nops(&hdr);
2074 }
2075
2076 /*
2077 * Encode an OPEN_DOWNGRADE request
2078 */
2079 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2080 struct xdr_stream *xdr,
2081 struct nfs_closeargs *args)
2082 {
2083 struct compound_hdr hdr = {
2084 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2085 };
2086
2087 encode_compound_hdr(xdr, req, &hdr);
2088 encode_sequence(xdr, &args->seq_args, &hdr);
2089 encode_putfh(xdr, args->fh, &hdr);
2090 encode_open_downgrade(xdr, args, &hdr);
2091 encode_getfattr(xdr, args->bitmask, &hdr);
2092 encode_nops(&hdr);
2093 }
2094
2095 /*
2096 * Encode a LOCK request
2097 */
2098 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2099 struct nfs_lock_args *args)
2100 {
2101 struct compound_hdr hdr = {
2102 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2103 };
2104
2105 encode_compound_hdr(xdr, req, &hdr);
2106 encode_sequence(xdr, &args->seq_args, &hdr);
2107 encode_putfh(xdr, args->fh, &hdr);
2108 encode_lock(xdr, args, &hdr);
2109 encode_nops(&hdr);
2110 }
2111
2112 /*
2113 * Encode a LOCKT request
2114 */
2115 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2116 struct nfs_lockt_args *args)
2117 {
2118 struct compound_hdr hdr = {
2119 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120 };
2121
2122 encode_compound_hdr(xdr, req, &hdr);
2123 encode_sequence(xdr, &args->seq_args, &hdr);
2124 encode_putfh(xdr, args->fh, &hdr);
2125 encode_lockt(xdr, args, &hdr);
2126 encode_nops(&hdr);
2127 }
2128
2129 /*
2130 * Encode a LOCKU request
2131 */
2132 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2133 struct nfs_locku_args *args)
2134 {
2135 struct compound_hdr hdr = {
2136 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137 };
2138
2139 encode_compound_hdr(xdr, req, &hdr);
2140 encode_sequence(xdr, &args->seq_args, &hdr);
2141 encode_putfh(xdr, args->fh, &hdr);
2142 encode_locku(xdr, args, &hdr);
2143 encode_nops(&hdr);
2144 }
2145
2146 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2147 struct xdr_stream *xdr,
2148 struct nfs_release_lockowner_args *args)
2149 {
2150 struct compound_hdr hdr = {
2151 .minorversion = 0,
2152 };
2153
2154 encode_compound_hdr(xdr, req, &hdr);
2155 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2156 encode_nops(&hdr);
2157 }
2158
2159 /*
2160 * Encode a READLINK request
2161 */
2162 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2163 const struct nfs4_readlink *args)
2164 {
2165 struct compound_hdr hdr = {
2166 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2167 };
2168
2169 encode_compound_hdr(xdr, req, &hdr);
2170 encode_sequence(xdr, &args->seq_args, &hdr);
2171 encode_putfh(xdr, args->fh, &hdr);
2172 encode_readlink(xdr, args, req, &hdr);
2173
2174 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2175 args->pgbase, args->pglen);
2176 encode_nops(&hdr);
2177 }
2178
2179 /*
2180 * Encode a READDIR request
2181 */
2182 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2183 const struct nfs4_readdir_arg *args)
2184 {
2185 struct compound_hdr hdr = {
2186 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2187 };
2188
2189 encode_compound_hdr(xdr, req, &hdr);
2190 encode_sequence(xdr, &args->seq_args, &hdr);
2191 encode_putfh(xdr, args->fh, &hdr);
2192 encode_readdir(xdr, args, req, &hdr);
2193
2194 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2195 args->pgbase, args->count);
2196 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2197 __func__, hdr.replen << 2, args->pages,
2198 args->pgbase, args->count);
2199 encode_nops(&hdr);
2200 }
2201
2202 /*
2203 * Encode a READ request
2204 */
2205 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2206 struct nfs_readargs *args)
2207 {
2208 struct compound_hdr hdr = {
2209 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2210 };
2211
2212 encode_compound_hdr(xdr, req, &hdr);
2213 encode_sequence(xdr, &args->seq_args, &hdr);
2214 encode_putfh(xdr, args->fh, &hdr);
2215 encode_read(xdr, args, &hdr);
2216
2217 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2218 args->pages, args->pgbase, args->count);
2219 req->rq_rcv_buf.flags |= XDRBUF_READ;
2220 encode_nops(&hdr);
2221 }
2222
2223 /*
2224 * Encode an SETATTR request
2225 */
2226 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2227 struct nfs_setattrargs *args)
2228 {
2229 struct compound_hdr hdr = {
2230 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231 };
2232
2233 encode_compound_hdr(xdr, req, &hdr);
2234 encode_sequence(xdr, &args->seq_args, &hdr);
2235 encode_putfh(xdr, args->fh, &hdr);
2236 encode_setattr(xdr, args, args->server, &hdr);
2237 encode_getfattr(xdr, args->bitmask, &hdr);
2238 encode_nops(&hdr);
2239 }
2240
2241 /*
2242 * Encode a GETACL request
2243 */
2244 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2245 struct nfs_getaclargs *args)
2246 {
2247 struct compound_hdr hdr = {
2248 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2249 };
2250 uint32_t replen;
2251
2252 encode_compound_hdr(xdr, req, &hdr);
2253 encode_sequence(xdr, &args->seq_args, &hdr);
2254 encode_putfh(xdr, args->fh, &hdr);
2255 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2256 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2257
2258 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2259 args->acl_pages, args->acl_pgbase, args->acl_len);
2260 encode_nops(&hdr);
2261 }
2262
2263 /*
2264 * Encode a WRITE request
2265 */
2266 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2267 struct nfs_writeargs *args)
2268 {
2269 struct compound_hdr hdr = {
2270 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2271 };
2272
2273 encode_compound_hdr(xdr, req, &hdr);
2274 encode_sequence(xdr, &args->seq_args, &hdr);
2275 encode_putfh(xdr, args->fh, &hdr);
2276 encode_write(xdr, args, &hdr);
2277 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2278 if (args->bitmask)
2279 encode_getfattr(xdr, args->bitmask, &hdr);
2280 encode_nops(&hdr);
2281 }
2282
2283 /*
2284 * a COMMIT request
2285 */
2286 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2287 struct nfs_writeargs *args)
2288 {
2289 struct compound_hdr hdr = {
2290 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291 };
2292
2293 encode_compound_hdr(xdr, req, &hdr);
2294 encode_sequence(xdr, &args->seq_args, &hdr);
2295 encode_putfh(xdr, args->fh, &hdr);
2296 encode_commit(xdr, args, &hdr);
2297 encode_getfattr(xdr, args->bitmask, &hdr);
2298 encode_nops(&hdr);
2299 }
2300
2301 /*
2302 * FSINFO request
2303 */
2304 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2305 struct nfs4_fsinfo_arg *args)
2306 {
2307 struct compound_hdr hdr = {
2308 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309 };
2310
2311 encode_compound_hdr(xdr, req, &hdr);
2312 encode_sequence(xdr, &args->seq_args, &hdr);
2313 encode_putfh(xdr, args->fh, &hdr);
2314 encode_fsinfo(xdr, args->bitmask, &hdr);
2315 encode_nops(&hdr);
2316 }
2317
2318 /*
2319 * a PATHCONF request
2320 */
2321 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2322 const struct nfs4_pathconf_arg *args)
2323 {
2324 struct compound_hdr hdr = {
2325 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2326 };
2327
2328 encode_compound_hdr(xdr, req, &hdr);
2329 encode_sequence(xdr, &args->seq_args, &hdr);
2330 encode_putfh(xdr, args->fh, &hdr);
2331 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2332 &hdr);
2333 encode_nops(&hdr);
2334 }
2335
2336 /*
2337 * a STATFS request
2338 */
2339 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2340 const struct nfs4_statfs_arg *args)
2341 {
2342 struct compound_hdr hdr = {
2343 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2344 };
2345
2346 encode_compound_hdr(xdr, req, &hdr);
2347 encode_sequence(xdr, &args->seq_args, &hdr);
2348 encode_putfh(xdr, args->fh, &hdr);
2349 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2350 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2351 encode_nops(&hdr);
2352 }
2353
2354 /*
2355 * GETATTR_BITMAP request
2356 */
2357 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2358 struct xdr_stream *xdr,
2359 struct nfs4_server_caps_arg *args)
2360 {
2361 struct compound_hdr hdr = {
2362 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2363 };
2364
2365 encode_compound_hdr(xdr, req, &hdr);
2366 encode_sequence(xdr, &args->seq_args, &hdr);
2367 encode_putfh(xdr, args->fhandle, &hdr);
2368 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2369 FATTR4_WORD0_LINK_SUPPORT|
2370 FATTR4_WORD0_SYMLINK_SUPPORT|
2371 FATTR4_WORD0_ACLSUPPORT, &hdr);
2372 encode_nops(&hdr);
2373 }
2374
2375 /*
2376 * a RENEW request
2377 */
2378 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2379 struct nfs_client *clp)
2380 {
2381 struct compound_hdr hdr = {
2382 .nops = 0,
2383 };
2384
2385 encode_compound_hdr(xdr, req, &hdr);
2386 encode_renew(xdr, clp, &hdr);
2387 encode_nops(&hdr);
2388 }
2389
2390 /*
2391 * a SETCLIENTID request
2392 */
2393 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2394 struct xdr_stream *xdr,
2395 struct nfs4_setclientid *sc)
2396 {
2397 struct compound_hdr hdr = {
2398 .nops = 0,
2399 };
2400
2401 encode_compound_hdr(xdr, req, &hdr);
2402 encode_setclientid(xdr, sc, &hdr);
2403 encode_nops(&hdr);
2404 }
2405
2406 /*
2407 * a SETCLIENTID_CONFIRM request
2408 */
2409 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2410 struct xdr_stream *xdr,
2411 struct nfs4_setclientid_res *arg)
2412 {
2413 struct compound_hdr hdr = {
2414 .nops = 0,
2415 };
2416 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2417
2418 encode_compound_hdr(xdr, req, &hdr);
2419 encode_setclientid_confirm(xdr, arg, &hdr);
2420 encode_putrootfh(xdr, &hdr);
2421 encode_fsinfo(xdr, lease_bitmap, &hdr);
2422 encode_nops(&hdr);
2423 }
2424
2425 /*
2426 * DELEGRETURN request
2427 */
2428 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2429 struct xdr_stream *xdr,
2430 const struct nfs4_delegreturnargs *args)
2431 {
2432 struct compound_hdr hdr = {
2433 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2434 };
2435
2436 encode_compound_hdr(xdr, req, &hdr);
2437 encode_sequence(xdr, &args->seq_args, &hdr);
2438 encode_putfh(xdr, args->fhandle, &hdr);
2439 encode_delegreturn(xdr, args->stateid, &hdr);
2440 encode_getfattr(xdr, args->bitmask, &hdr);
2441 encode_nops(&hdr);
2442 }
2443
2444 /*
2445 * Encode FS_LOCATIONS request
2446 */
2447 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2448 struct xdr_stream *xdr,
2449 struct nfs4_fs_locations_arg *args)
2450 {
2451 struct compound_hdr hdr = {
2452 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2453 };
2454 uint32_t replen;
2455
2456 encode_compound_hdr(xdr, req, &hdr);
2457 encode_sequence(xdr, &args->seq_args, &hdr);
2458 encode_putfh(xdr, args->dir_fh, &hdr);
2459 encode_lookup(xdr, args->name, &hdr);
2460 replen = hdr.replen; /* get the attribute into args->page */
2461 encode_fs_locations(xdr, args->bitmask, &hdr);
2462
2463 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2464 0, PAGE_SIZE);
2465 encode_nops(&hdr);
2466 }
2467
2468 #if defined(CONFIG_NFS_V4_1)
2469 /*
2470 * EXCHANGE_ID request
2471 */
2472 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2473 struct xdr_stream *xdr,
2474 struct nfs41_exchange_id_args *args)
2475 {
2476 struct compound_hdr hdr = {
2477 .minorversion = args->client->cl_mvops->minor_version,
2478 };
2479
2480 encode_compound_hdr(xdr, req, &hdr);
2481 encode_exchange_id(xdr, args, &hdr);
2482 encode_nops(&hdr);
2483 }
2484
2485 /*
2486 * a CREATE_SESSION request
2487 */
2488 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2489 struct xdr_stream *xdr,
2490 struct nfs41_create_session_args *args)
2491 {
2492 struct compound_hdr hdr = {
2493 .minorversion = args->client->cl_mvops->minor_version,
2494 };
2495
2496 encode_compound_hdr(xdr, req, &hdr);
2497 encode_create_session(xdr, args, &hdr);
2498 encode_nops(&hdr);
2499 }
2500
2501 /*
2502 * a DESTROY_SESSION request
2503 */
2504 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2505 struct xdr_stream *xdr,
2506 struct nfs4_session *session)
2507 {
2508 struct compound_hdr hdr = {
2509 .minorversion = session->clp->cl_mvops->minor_version,
2510 };
2511
2512 encode_compound_hdr(xdr, req, &hdr);
2513 encode_destroy_session(xdr, session, &hdr);
2514 encode_nops(&hdr);
2515 }
2516
2517 /*
2518 * a SEQUENCE request
2519 */
2520 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2521 struct nfs4_sequence_args *args)
2522 {
2523 struct compound_hdr hdr = {
2524 .minorversion = nfs4_xdr_minorversion(args),
2525 };
2526
2527 encode_compound_hdr(xdr, req, &hdr);
2528 encode_sequence(xdr, args, &hdr);
2529 encode_nops(&hdr);
2530 }
2531
2532 /*
2533 * a GET_LEASE_TIME request
2534 */
2535 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2536 struct xdr_stream *xdr,
2537 struct nfs4_get_lease_time_args *args)
2538 {
2539 struct compound_hdr hdr = {
2540 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2541 };
2542 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2543
2544 encode_compound_hdr(xdr, req, &hdr);
2545 encode_sequence(xdr, &args->la_seq_args, &hdr);
2546 encode_putrootfh(xdr, &hdr);
2547 encode_fsinfo(xdr, lease_bitmap, &hdr);
2548 encode_nops(&hdr);
2549 }
2550
2551 /*
2552 * a RECLAIM_COMPLETE request
2553 */
2554 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2555 struct xdr_stream *xdr,
2556 struct nfs41_reclaim_complete_args *args)
2557 {
2558 struct compound_hdr hdr = {
2559 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2560 };
2561
2562 encode_compound_hdr(xdr, req, &hdr);
2563 encode_sequence(xdr, &args->seq_args, &hdr);
2564 encode_reclaim_complete(xdr, args, &hdr);
2565 encode_nops(&hdr);
2566 }
2567
2568 /*
2569 * Encode GETDEVICEINFO request
2570 */
2571 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2572 struct xdr_stream *xdr,
2573 struct nfs4_getdeviceinfo_args *args)
2574 {
2575 struct compound_hdr hdr = {
2576 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577 };
2578
2579 encode_compound_hdr(xdr, req, &hdr);
2580 encode_sequence(xdr, &args->seq_args, &hdr);
2581 encode_getdeviceinfo(xdr, args, &hdr);
2582
2583 /* set up reply kvec. Subtract notification bitmap max size (2)
2584 * so that notification bitmap is put in xdr_buf tail */
2585 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2586 args->pdev->pages, args->pdev->pgbase,
2587 args->pdev->pglen);
2588
2589 encode_nops(&hdr);
2590 }
2591
2592 /*
2593 * Encode LAYOUTGET request
2594 */
2595 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2596 struct xdr_stream *xdr,
2597 struct nfs4_layoutget_args *args)
2598 {
2599 struct compound_hdr hdr = {
2600 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2601 };
2602
2603 encode_compound_hdr(xdr, req, &hdr);
2604 encode_sequence(xdr, &args->seq_args, &hdr);
2605 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2606 encode_layoutget(xdr, args, &hdr);
2607 encode_nops(&hdr);
2608 }
2609 #endif /* CONFIG_NFS_V4_1 */
2610
2611 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2612 {
2613 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2614 "Remaining buffer length is %tu words.\n",
2615 func, xdr->end - xdr->p);
2616 }
2617
2618 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2619 {
2620 __be32 *p;
2621
2622 p = xdr_inline_decode(xdr, 4);
2623 if (unlikely(!p))
2624 goto out_overflow;
2625 *len = be32_to_cpup(p);
2626 p = xdr_inline_decode(xdr, *len);
2627 if (unlikely(!p))
2628 goto out_overflow;
2629 *string = (char *)p;
2630 return 0;
2631 out_overflow:
2632 print_overflow_msg(__func__, xdr);
2633 return -EIO;
2634 }
2635
2636 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2637 {
2638 __be32 *p;
2639
2640 p = xdr_inline_decode(xdr, 8);
2641 if (unlikely(!p))
2642 goto out_overflow;
2643 hdr->status = be32_to_cpup(p++);
2644 hdr->taglen = be32_to_cpup(p);
2645
2646 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2647 if (unlikely(!p))
2648 goto out_overflow;
2649 hdr->tag = (char *)p;
2650 p += XDR_QUADLEN(hdr->taglen);
2651 hdr->nops = be32_to_cpup(p);
2652 if (unlikely(hdr->nops < 1))
2653 return nfs4_stat_to_errno(hdr->status);
2654 return 0;
2655 out_overflow:
2656 print_overflow_msg(__func__, xdr);
2657 return -EIO;
2658 }
2659
2660 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2661 {
2662 __be32 *p;
2663 uint32_t opnum;
2664 int32_t nfserr;
2665
2666 p = xdr_inline_decode(xdr, 8);
2667 if (unlikely(!p))
2668 goto out_overflow;
2669 opnum = be32_to_cpup(p++);
2670 if (opnum != expected) {
2671 dprintk("nfs: Server returned operation"
2672 " %d but we issued a request for %d\n",
2673 opnum, expected);
2674 return -EIO;
2675 }
2676 nfserr = be32_to_cpup(p);
2677 if (nfserr != NFS_OK)
2678 return nfs4_stat_to_errno(nfserr);
2679 return 0;
2680 out_overflow:
2681 print_overflow_msg(__func__, xdr);
2682 return -EIO;
2683 }
2684
2685 /* Dummy routine */
2686 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2687 {
2688 __be32 *p;
2689 unsigned int strlen;
2690 char *str;
2691
2692 p = xdr_inline_decode(xdr, 12);
2693 if (likely(p))
2694 return decode_opaque_inline(xdr, &strlen, &str);
2695 print_overflow_msg(__func__, xdr);
2696 return -EIO;
2697 }
2698
2699 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2700 {
2701 uint32_t bmlen;
2702 __be32 *p;
2703
2704 p = xdr_inline_decode(xdr, 4);
2705 if (unlikely(!p))
2706 goto out_overflow;
2707 bmlen = be32_to_cpup(p);
2708
2709 bitmap[0] = bitmap[1] = 0;
2710 p = xdr_inline_decode(xdr, (bmlen << 2));
2711 if (unlikely(!p))
2712 goto out_overflow;
2713 if (bmlen > 0) {
2714 bitmap[0] = be32_to_cpup(p++);
2715 if (bmlen > 1)
2716 bitmap[1] = be32_to_cpup(p);
2717 }
2718 return 0;
2719 out_overflow:
2720 print_overflow_msg(__func__, xdr);
2721 return -EIO;
2722 }
2723
2724 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2725 {
2726 __be32 *p;
2727
2728 p = xdr_inline_decode(xdr, 4);
2729 if (unlikely(!p))
2730 goto out_overflow;
2731 *attrlen = be32_to_cpup(p);
2732 *savep = xdr->p;
2733 return 0;
2734 out_overflow:
2735 print_overflow_msg(__func__, xdr);
2736 return -EIO;
2737 }
2738
2739 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2740 {
2741 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2742 int ret;
2743 ret = decode_attr_bitmap(xdr, bitmask);
2744 if (unlikely(ret < 0))
2745 return ret;
2746 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2747 } else
2748 bitmask[0] = bitmask[1] = 0;
2749 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2750 return 0;
2751 }
2752
2753 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2754 {
2755 __be32 *p;
2756 int ret = 0;
2757
2758 *type = 0;
2759 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2760 return -EIO;
2761 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2762 p = xdr_inline_decode(xdr, 4);
2763 if (unlikely(!p))
2764 goto out_overflow;
2765 *type = be32_to_cpup(p);
2766 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2767 dprintk("%s: bad type %d\n", __func__, *type);
2768 return -EIO;
2769 }
2770 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2771 ret = NFS_ATTR_FATTR_TYPE;
2772 }
2773 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2774 return ret;
2775 out_overflow:
2776 print_overflow_msg(__func__, xdr);
2777 return -EIO;
2778 }
2779
2780 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2781 {
2782 __be32 *p;
2783 int ret = 0;
2784
2785 *change = 0;
2786 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2787 return -EIO;
2788 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2789 p = xdr_inline_decode(xdr, 8);
2790 if (unlikely(!p))
2791 goto out_overflow;
2792 xdr_decode_hyper(p, change);
2793 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2794 ret = NFS_ATTR_FATTR_CHANGE;
2795 }
2796 dprintk("%s: change attribute=%Lu\n", __func__,
2797 (unsigned long long)*change);
2798 return ret;
2799 out_overflow:
2800 print_overflow_msg(__func__, xdr);
2801 return -EIO;
2802 }
2803
2804 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2805 {
2806 __be32 *p;
2807 int ret = 0;
2808
2809 *size = 0;
2810 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2811 return -EIO;
2812 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2813 p = xdr_inline_decode(xdr, 8);
2814 if (unlikely(!p))
2815 goto out_overflow;
2816 xdr_decode_hyper(p, size);
2817 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2818 ret = NFS_ATTR_FATTR_SIZE;
2819 }
2820 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2821 return ret;
2822 out_overflow:
2823 print_overflow_msg(__func__, xdr);
2824 return -EIO;
2825 }
2826
2827 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2828 {
2829 __be32 *p;
2830
2831 *res = 0;
2832 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2833 return -EIO;
2834 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2835 p = xdr_inline_decode(xdr, 4);
2836 if (unlikely(!p))
2837 goto out_overflow;
2838 *res = be32_to_cpup(p);
2839 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2840 }
2841 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2842 return 0;
2843 out_overflow:
2844 print_overflow_msg(__func__, xdr);
2845 return -EIO;
2846 }
2847
2848 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2849 {
2850 __be32 *p;
2851
2852 *res = 0;
2853 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2854 return -EIO;
2855 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2856 p = xdr_inline_decode(xdr, 4);
2857 if (unlikely(!p))
2858 goto out_overflow;
2859 *res = be32_to_cpup(p);
2860 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2861 }
2862 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2863 return 0;
2864 out_overflow:
2865 print_overflow_msg(__func__, xdr);
2866 return -EIO;
2867 }
2868
2869 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2870 {
2871 __be32 *p;
2872 int ret = 0;
2873
2874 fsid->major = 0;
2875 fsid->minor = 0;
2876 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2877 return -EIO;
2878 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2879 p = xdr_inline_decode(xdr, 16);
2880 if (unlikely(!p))
2881 goto out_overflow;
2882 p = xdr_decode_hyper(p, &fsid->major);
2883 xdr_decode_hyper(p, &fsid->minor);
2884 bitmap[0] &= ~FATTR4_WORD0_FSID;
2885 ret = NFS_ATTR_FATTR_FSID;
2886 }
2887 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2888 (unsigned long long)fsid->major,
2889 (unsigned long long)fsid->minor);
2890 return ret;
2891 out_overflow:
2892 print_overflow_msg(__func__, xdr);
2893 return -EIO;
2894 }
2895
2896 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2897 {
2898 __be32 *p;
2899
2900 *res = 60;
2901 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2902 return -EIO;
2903 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2904 p = xdr_inline_decode(xdr, 4);
2905 if (unlikely(!p))
2906 goto out_overflow;
2907 *res = be32_to_cpup(p);
2908 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2909 }
2910 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2911 return 0;
2912 out_overflow:
2913 print_overflow_msg(__func__, xdr);
2914 return -EIO;
2915 }
2916
2917 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2918 {
2919 __be32 *p;
2920
2921 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2922 return -EIO;
2923 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2924 p = xdr_inline_decode(xdr, 4);
2925 if (unlikely(!p))
2926 goto out_overflow;
2927 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2928 }
2929 return 0;
2930 out_overflow:
2931 print_overflow_msg(__func__, xdr);
2932 return -EIO;
2933 }
2934
2935 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2936 {
2937 __be32 *p;
2938 int len;
2939
2940 if (fh != NULL)
2941 memset(fh, 0, sizeof(*fh));
2942
2943 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2944 return -EIO;
2945 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2946 p = xdr_inline_decode(xdr, 4);
2947 if (unlikely(!p))
2948 goto out_overflow;
2949 len = be32_to_cpup(p);
2950 if (len > NFS4_FHSIZE)
2951 return -EIO;
2952 p = xdr_inline_decode(xdr, len);
2953 if (unlikely(!p))
2954 goto out_overflow;
2955 if (fh != NULL) {
2956 memcpy(fh->data, p, len);
2957 fh->size = len;
2958 }
2959 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2960 }
2961 return 0;
2962 out_overflow:
2963 print_overflow_msg(__func__, xdr);
2964 return -EIO;
2965 }
2966
2967 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2968 {
2969 __be32 *p;
2970
2971 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2972 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2973 return -EIO;
2974 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2975 p = xdr_inline_decode(xdr, 4);
2976 if (unlikely(!p))
2977 goto out_overflow;
2978 *res = be32_to_cpup(p);
2979 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2980 }
2981 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2982 return 0;
2983 out_overflow:
2984 print_overflow_msg(__func__, xdr);
2985 return -EIO;
2986 }
2987
2988 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2989 {
2990 __be32 *p;
2991 int ret = 0;
2992
2993 *fileid = 0;
2994 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2995 return -EIO;
2996 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2997 p = xdr_inline_decode(xdr, 8);
2998 if (unlikely(!p))
2999 goto out_overflow;
3000 xdr_decode_hyper(p, fileid);
3001 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3002 ret = NFS_ATTR_FATTR_FILEID;
3003 }
3004 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3005 return ret;
3006 out_overflow:
3007 print_overflow_msg(__func__, xdr);
3008 return -EIO;
3009 }
3010
3011 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3012 {
3013 __be32 *p;
3014 int ret = 0;
3015
3016 *fileid = 0;
3017 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3018 return -EIO;
3019 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3020 p = xdr_inline_decode(xdr, 8);
3021 if (unlikely(!p))
3022 goto out_overflow;
3023 xdr_decode_hyper(p, fileid);
3024 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3025 ret = NFS_ATTR_FATTR_FILEID;
3026 }
3027 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3028 return ret;
3029 out_overflow:
3030 print_overflow_msg(__func__, xdr);
3031 return -EIO;
3032 }
3033
3034 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3035 {
3036 __be32 *p;
3037 int status = 0;
3038
3039 *res = 0;
3040 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3041 return -EIO;
3042 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3043 p = xdr_inline_decode(xdr, 8);
3044 if (unlikely(!p))
3045 goto out_overflow;
3046 xdr_decode_hyper(p, res);
3047 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3048 }
3049 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3050 return status;
3051 out_overflow:
3052 print_overflow_msg(__func__, xdr);
3053 return -EIO;
3054 }
3055
3056 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3057 {
3058 __be32 *p;
3059 int status = 0;
3060
3061 *res = 0;
3062 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3063 return -EIO;
3064 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3065 p = xdr_inline_decode(xdr, 8);
3066 if (unlikely(!p))
3067 goto out_overflow;
3068 xdr_decode_hyper(p, res);
3069 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3070 }
3071 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3072 return status;
3073 out_overflow:
3074 print_overflow_msg(__func__, xdr);
3075 return -EIO;
3076 }
3077
3078 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3079 {
3080 __be32 *p;
3081 int status = 0;
3082
3083 *res = 0;
3084 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3085 return -EIO;
3086 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3087 p = xdr_inline_decode(xdr, 8);
3088 if (unlikely(!p))
3089 goto out_overflow;
3090 xdr_decode_hyper(p, res);
3091 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3092 }
3093 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3094 return status;
3095 out_overflow:
3096 print_overflow_msg(__func__, xdr);
3097 return -EIO;
3098 }
3099
3100 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3101 {
3102 u32 n;
3103 __be32 *p;
3104 int status = 0;
3105
3106 p = xdr_inline_decode(xdr, 4);
3107 if (unlikely(!p))
3108 goto out_overflow;
3109 n = be32_to_cpup(p);
3110 if (n == 0)
3111 goto root_path;
3112 dprintk("path ");
3113 path->ncomponents = 0;
3114 while (path->ncomponents < n) {
3115 struct nfs4_string *component = &path->components[path->ncomponents];
3116 status = decode_opaque_inline(xdr, &component->len, &component->data);
3117 if (unlikely(status != 0))
3118 goto out_eio;
3119 if (path->ncomponents != n)
3120 dprintk("/");
3121 dprintk("%s", component->data);
3122 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3123 path->ncomponents++;
3124 else {
3125 dprintk("cannot parse %d components in path\n", n);
3126 goto out_eio;
3127 }
3128 }
3129 out:
3130 dprintk("\n");
3131 return status;
3132 root_path:
3133 /* a root pathname is sent as a zero component4 */
3134 path->ncomponents = 1;
3135 path->components[0].len=0;
3136 path->components[0].data=NULL;
3137 dprintk("path /\n");
3138 goto out;
3139 out_eio:
3140 dprintk(" status %d", status);
3141 status = -EIO;
3142 goto out;
3143 out_overflow:
3144 print_overflow_msg(__func__, xdr);
3145 return -EIO;
3146 }
3147
3148 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3149 {
3150 int n;
3151 __be32 *p;
3152 int status = -EIO;
3153
3154 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3155 goto out;
3156 status = 0;
3157 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3158 goto out;
3159 dprintk("%s: fsroot ", __func__);
3160 status = decode_pathname(xdr, &res->fs_path);
3161 if (unlikely(status != 0))
3162 goto out;
3163 p = xdr_inline_decode(xdr, 4);
3164 if (unlikely(!p))
3165 goto out_overflow;
3166 n = be32_to_cpup(p);
3167 if (n <= 0)
3168 goto out_eio;
3169 res->nlocations = 0;
3170 while (res->nlocations < n) {
3171 u32 m;
3172 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3173
3174 p = xdr_inline_decode(xdr, 4);
3175 if (unlikely(!p))
3176 goto out_overflow;
3177 m = be32_to_cpup(p);
3178
3179 loc->nservers = 0;
3180 dprintk("%s: servers ", __func__);
3181 while (loc->nservers < m) {
3182 struct nfs4_string *server = &loc->servers[loc->nservers];
3183 status = decode_opaque_inline(xdr, &server->len, &server->data);
3184 if (unlikely(status != 0))
3185 goto out_eio;
3186 dprintk("%s ", server->data);
3187 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3188 loc->nservers++;
3189 else {
3190 unsigned int i;
3191 dprintk("%s: using first %u of %u servers "
3192 "returned for location %u\n",
3193 __func__,
3194 NFS4_FS_LOCATION_MAXSERVERS,
3195 m, res->nlocations);
3196 for (i = loc->nservers; i < m; i++) {
3197 unsigned int len;
3198 char *data;
3199 status = decode_opaque_inline(xdr, &len, &data);
3200 if (unlikely(status != 0))
3201 goto out_eio;
3202 }
3203 }
3204 }
3205 status = decode_pathname(xdr, &loc->rootpath);
3206 if (unlikely(status != 0))
3207 goto out_eio;
3208 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3209 res->nlocations++;
3210 }
3211 if (res->nlocations != 0)
3212 status = NFS_ATTR_FATTR_V4_REFERRAL;
3213 out:
3214 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3215 return status;
3216 out_overflow:
3217 print_overflow_msg(__func__, xdr);
3218 out_eio:
3219 status = -EIO;
3220 goto out;
3221 }
3222
3223 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3224 {
3225 __be32 *p;
3226 int status = 0;
3227
3228 *res = 0;
3229 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3230 return -EIO;
3231 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3232 p = xdr_inline_decode(xdr, 8);
3233 if (unlikely(!p))
3234 goto out_overflow;
3235 xdr_decode_hyper(p, res);
3236 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3237 }
3238 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3239 return status;
3240 out_overflow:
3241 print_overflow_msg(__func__, xdr);
3242 return -EIO;
3243 }
3244
3245 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3246 {
3247 __be32 *p;
3248 int status = 0;
3249
3250 *maxlink = 1;
3251 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3252 return -EIO;
3253 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3254 p = xdr_inline_decode(xdr, 4);
3255 if (unlikely(!p))
3256 goto out_overflow;
3257 *maxlink = be32_to_cpup(p);
3258 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3259 }
3260 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3261 return status;
3262 out_overflow:
3263 print_overflow_msg(__func__, xdr);
3264 return -EIO;
3265 }
3266
3267 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3268 {
3269 __be32 *p;
3270 int status = 0;
3271
3272 *maxname = 1024;
3273 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3274 return -EIO;
3275 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3276 p = xdr_inline_decode(xdr, 4);
3277 if (unlikely(!p))
3278 goto out_overflow;
3279 *maxname = be32_to_cpup(p);
3280 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3281 }
3282 dprintk("%s: maxname=%u\n", __func__, *maxname);
3283 return status;
3284 out_overflow:
3285 print_overflow_msg(__func__, xdr);
3286 return -EIO;
3287 }
3288
3289 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3290 {
3291 __be32 *p;
3292 int status = 0;
3293
3294 *res = 1024;
3295 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3296 return -EIO;
3297 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3298 uint64_t maxread;
3299 p = xdr_inline_decode(xdr, 8);
3300 if (unlikely(!p))
3301 goto out_overflow;
3302 xdr_decode_hyper(p, &maxread);
3303 if (maxread > 0x7FFFFFFF)
3304 maxread = 0x7FFFFFFF;
3305 *res = (uint32_t)maxread;
3306 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3307 }
3308 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3309 return status;
3310 out_overflow:
3311 print_overflow_msg(__func__, xdr);
3312 return -EIO;
3313 }
3314
3315 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3316 {
3317 __be32 *p;
3318 int status = 0;
3319
3320 *res = 1024;
3321 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3322 return -EIO;
3323 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3324 uint64_t maxwrite;
3325 p = xdr_inline_decode(xdr, 8);
3326 if (unlikely(!p))
3327 goto out_overflow;
3328 xdr_decode_hyper(p, &maxwrite);
3329 if (maxwrite > 0x7FFFFFFF)
3330 maxwrite = 0x7FFFFFFF;
3331 *res = (uint32_t)maxwrite;
3332 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3333 }
3334 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3335 return status;
3336 out_overflow:
3337 print_overflow_msg(__func__, xdr);
3338 return -EIO;
3339 }
3340
3341 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3342 {
3343 uint32_t tmp;
3344 __be32 *p;
3345 int ret = 0;
3346
3347 *mode = 0;
3348 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3349 return -EIO;
3350 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3351 p = xdr_inline_decode(xdr, 4);
3352 if (unlikely(!p))
3353 goto out_overflow;
3354 tmp = be32_to_cpup(p);
3355 *mode = tmp & ~S_IFMT;
3356 bitmap[1] &= ~FATTR4_WORD1_MODE;
3357 ret = NFS_ATTR_FATTR_MODE;
3358 }
3359 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3360 return ret;
3361 out_overflow:
3362 print_overflow_msg(__func__, xdr);
3363 return -EIO;
3364 }
3365
3366 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3367 {
3368 __be32 *p;
3369 int ret = 0;
3370
3371 *nlink = 1;
3372 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3373 return -EIO;
3374 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3375 p = xdr_inline_decode(xdr, 4);
3376 if (unlikely(!p))
3377 goto out_overflow;
3378 *nlink = be32_to_cpup(p);
3379 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3380 ret = NFS_ATTR_FATTR_NLINK;
3381 }
3382 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3383 return ret;
3384 out_overflow:
3385 print_overflow_msg(__func__, xdr);
3386 return -EIO;
3387 }
3388
3389 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3390 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3391 {
3392 uint32_t len;
3393 __be32 *p;
3394 int ret = 0;
3395
3396 *uid = -2;
3397 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3398 return -EIO;
3399 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3400 p = xdr_inline_decode(xdr, 4);
3401 if (unlikely(!p))
3402 goto out_overflow;
3403 len = be32_to_cpup(p);
3404 p = xdr_inline_decode(xdr, len);
3405 if (unlikely(!p))
3406 goto out_overflow;
3407 if (!may_sleep) {
3408 /* do nothing */
3409 } else if (len < XDR_MAX_NETOBJ) {
3410 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3411 ret = NFS_ATTR_FATTR_OWNER;
3412 else
3413 dprintk("%s: nfs_map_name_to_uid failed!\n",
3414 __func__);
3415 } else
3416 dprintk("%s: name too long (%u)!\n",
3417 __func__, len);
3418 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3419 }
3420 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3421 return ret;
3422 out_overflow:
3423 print_overflow_msg(__func__, xdr);
3424 return -EIO;
3425 }
3426
3427 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3428 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3429 {
3430 uint32_t len;
3431 __be32 *p;
3432 int ret = 0;
3433
3434 *gid = -2;
3435 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3436 return -EIO;
3437 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3438 p = xdr_inline_decode(xdr, 4);
3439 if (unlikely(!p))
3440 goto out_overflow;
3441 len = be32_to_cpup(p);
3442 p = xdr_inline_decode(xdr, len);
3443 if (unlikely(!p))
3444 goto out_overflow;
3445 if (!may_sleep) {
3446 /* do nothing */
3447 } else if (len < XDR_MAX_NETOBJ) {
3448 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3449 ret = NFS_ATTR_FATTR_GROUP;
3450 else
3451 dprintk("%s: nfs_map_group_to_gid failed!\n",
3452 __func__);
3453 } else
3454 dprintk("%s: name too long (%u)!\n",
3455 __func__, len);
3456 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3457 }
3458 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3459 return ret;
3460 out_overflow:
3461 print_overflow_msg(__func__, xdr);
3462 return -EIO;
3463 }
3464
3465 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3466 {
3467 uint32_t major = 0, minor = 0;
3468 __be32 *p;
3469 int ret = 0;
3470
3471 *rdev = MKDEV(0,0);
3472 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3473 return -EIO;
3474 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3475 dev_t tmp;
3476
3477 p = xdr_inline_decode(xdr, 8);
3478 if (unlikely(!p))
3479 goto out_overflow;
3480 major = be32_to_cpup(p++);
3481 minor = be32_to_cpup(p);
3482 tmp = MKDEV(major, minor);
3483 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3484 *rdev = tmp;
3485 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3486 ret = NFS_ATTR_FATTR_RDEV;
3487 }
3488 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3489 return ret;
3490 out_overflow:
3491 print_overflow_msg(__func__, xdr);
3492 return -EIO;
3493 }
3494
3495 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3496 {
3497 __be32 *p;
3498 int status = 0;
3499
3500 *res = 0;
3501 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3502 return -EIO;
3503 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3504 p = xdr_inline_decode(xdr, 8);
3505 if (unlikely(!p))
3506 goto out_overflow;
3507 xdr_decode_hyper(p, res);
3508 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3509 }
3510 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3511 return status;
3512 out_overflow:
3513 print_overflow_msg(__func__, xdr);
3514 return -EIO;
3515 }
3516
3517 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3518 {
3519 __be32 *p;
3520 int status = 0;
3521
3522 *res = 0;
3523 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3524 return -EIO;
3525 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3526 p = xdr_inline_decode(xdr, 8);
3527 if (unlikely(!p))
3528 goto out_overflow;
3529 xdr_decode_hyper(p, res);
3530 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3531 }
3532 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3533 return status;
3534 out_overflow:
3535 print_overflow_msg(__func__, xdr);
3536 return -EIO;
3537 }
3538
3539 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3540 {
3541 __be32 *p;
3542 int status = 0;
3543
3544 *res = 0;
3545 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3546 return -EIO;
3547 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3548 p = xdr_inline_decode(xdr, 8);
3549 if (unlikely(!p))
3550 goto out_overflow;
3551 xdr_decode_hyper(p, res);
3552 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3553 }
3554 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3555 return status;
3556 out_overflow:
3557 print_overflow_msg(__func__, xdr);
3558 return -EIO;
3559 }
3560
3561 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3562 {
3563 __be32 *p;
3564 int ret = 0;
3565
3566 *used = 0;
3567 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3568 return -EIO;
3569 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3570 p = xdr_inline_decode(xdr, 8);
3571 if (unlikely(!p))
3572 goto out_overflow;
3573 xdr_decode_hyper(p, used);
3574 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3575 ret = NFS_ATTR_FATTR_SPACE_USED;
3576 }
3577 dprintk("%s: space used=%Lu\n", __func__,
3578 (unsigned long long)*used);
3579 return ret;
3580 out_overflow:
3581 print_overflow_msg(__func__, xdr);
3582 return -EIO;
3583 }
3584
3585 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3586 {
3587 __be32 *p;
3588 uint64_t sec;
3589 uint32_t nsec;
3590
3591 p = xdr_inline_decode(xdr, 12);
3592 if (unlikely(!p))
3593 goto out_overflow;
3594 p = xdr_decode_hyper(p, &sec);
3595 nsec = be32_to_cpup(p);
3596 time->tv_sec = (time_t)sec;
3597 time->tv_nsec = (long)nsec;
3598 return 0;
3599 out_overflow:
3600 print_overflow_msg(__func__, xdr);
3601 return -EIO;
3602 }
3603
3604 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3605 {
3606 int status = 0;
3607
3608 time->tv_sec = 0;
3609 time->tv_nsec = 0;
3610 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3611 return -EIO;
3612 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3613 status = decode_attr_time(xdr, time);
3614 if (status == 0)
3615 status = NFS_ATTR_FATTR_ATIME;
3616 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3617 }
3618 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3619 return status;
3620 }
3621
3622 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3623 {
3624 int status = 0;
3625
3626 time->tv_sec = 0;
3627 time->tv_nsec = 0;
3628 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3629 return -EIO;
3630 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3631 status = decode_attr_time(xdr, time);
3632 if (status == 0)
3633 status = NFS_ATTR_FATTR_CTIME;
3634 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3635 }
3636 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3637 return status;
3638 }
3639
3640 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3641 struct timespec *time)
3642 {
3643 int status = 0;
3644
3645 time->tv_sec = 0;
3646 time->tv_nsec = 0;
3647 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3648 return -EIO;
3649 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3650 status = decode_attr_time(xdr, time);
3651 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3652 }
3653 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3654 (long)time->tv_nsec);
3655 return status;
3656 }
3657
3658 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3659 {
3660 int status = 0;
3661
3662 time->tv_sec = 0;
3663 time->tv_nsec = 0;
3664 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3665 return -EIO;
3666 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3667 status = decode_attr_time(xdr, time);
3668 if (status == 0)
3669 status = NFS_ATTR_FATTR_MTIME;
3670 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3671 }
3672 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3673 return status;
3674 }
3675
3676 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3677 {
3678 unsigned int attrwords = XDR_QUADLEN(attrlen);
3679 unsigned int nwords = xdr->p - savep;
3680
3681 if (unlikely(attrwords != nwords)) {
3682 dprintk("%s: server returned incorrect attribute length: "
3683 "%u %c %u\n",
3684 __func__,
3685 attrwords << 2,
3686 (attrwords < nwords) ? '<' : '>',
3687 nwords << 2);
3688 return -EIO;
3689 }
3690 return 0;
3691 }
3692
3693 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3694 {
3695 __be32 *p;
3696
3697 p = xdr_inline_decode(xdr, 20);
3698 if (unlikely(!p))
3699 goto out_overflow;
3700 cinfo->atomic = be32_to_cpup(p++);
3701 p = xdr_decode_hyper(p, &cinfo->before);
3702 xdr_decode_hyper(p, &cinfo->after);
3703 return 0;
3704 out_overflow:
3705 print_overflow_msg(__func__, xdr);
3706 return -EIO;
3707 }
3708
3709 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3710 {
3711 __be32 *p;
3712 uint32_t supp, acc;
3713 int status;
3714
3715 status = decode_op_hdr(xdr, OP_ACCESS);
3716 if (status)
3717 return status;
3718 p = xdr_inline_decode(xdr, 8);
3719 if (unlikely(!p))
3720 goto out_overflow;
3721 supp = be32_to_cpup(p++);
3722 acc = be32_to_cpup(p);
3723 access->supported = supp;
3724 access->access = acc;
3725 return 0;
3726 out_overflow:
3727 print_overflow_msg(__func__, xdr);
3728 return -EIO;
3729 }
3730
3731 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3732 {
3733 __be32 *p;
3734
3735 p = xdr_inline_decode(xdr, len);
3736 if (likely(p)) {
3737 memcpy(buf, p, len);
3738 return 0;
3739 }
3740 print_overflow_msg(__func__, xdr);
3741 return -EIO;
3742 }
3743
3744 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3745 {
3746 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3747 }
3748
3749 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3750 {
3751 int status;
3752
3753 status = decode_op_hdr(xdr, OP_CLOSE);
3754 if (status != -EIO)
3755 nfs_increment_open_seqid(status, res->seqid);
3756 if (!status)
3757 status = decode_stateid(xdr, &res->stateid);
3758 return status;
3759 }
3760
3761 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3762 {
3763 return decode_opaque_fixed(xdr, verifier, 8);
3764 }
3765
3766 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3767 {
3768 int status;
3769
3770 status = decode_op_hdr(xdr, OP_COMMIT);
3771 if (!status)
3772 status = decode_verifier(xdr, res->verf->verifier);
3773 return status;
3774 }
3775
3776 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3777 {
3778 __be32 *p;
3779 uint32_t bmlen;
3780 int status;
3781
3782 status = decode_op_hdr(xdr, OP_CREATE);
3783 if (status)
3784 return status;
3785 if ((status = decode_change_info(xdr, cinfo)))
3786 return status;
3787 p = xdr_inline_decode(xdr, 4);
3788 if (unlikely(!p))
3789 goto out_overflow;
3790 bmlen = be32_to_cpup(p);
3791 p = xdr_inline_decode(xdr, bmlen << 2);
3792 if (likely(p))
3793 return 0;
3794 out_overflow:
3795 print_overflow_msg(__func__, xdr);
3796 return -EIO;
3797 }
3798
3799 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3800 {
3801 __be32 *savep;
3802 uint32_t attrlen, bitmap[2] = {0};
3803 int status;
3804
3805 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3806 goto xdr_error;
3807 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3808 goto xdr_error;
3809 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3810 goto xdr_error;
3811 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3812 goto xdr_error;
3813 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3814 goto xdr_error;
3815 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3816 goto xdr_error;
3817 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3818 goto xdr_error;
3819 status = verify_attr_len(xdr, savep, attrlen);
3820 xdr_error:
3821 dprintk("%s: xdr returned %d!\n", __func__, -status);
3822 return status;
3823 }
3824
3825 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3826 {
3827 __be32 *savep;
3828 uint32_t attrlen, bitmap[2] = {0};
3829 int status;
3830
3831 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3832 goto xdr_error;
3833 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3834 goto xdr_error;
3835 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3836 goto xdr_error;
3837
3838 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3839 goto xdr_error;
3840 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3841 goto xdr_error;
3842 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3843 goto xdr_error;
3844 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3845 goto xdr_error;
3846 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3847 goto xdr_error;
3848 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3849 goto xdr_error;
3850
3851 status = verify_attr_len(xdr, savep, attrlen);
3852 xdr_error:
3853 dprintk("%s: xdr returned %d!\n", __func__, -status);
3854 return status;
3855 }
3856
3857 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3858 {
3859 __be32 *savep;
3860 uint32_t attrlen, bitmap[2] = {0};
3861 int status;
3862
3863 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3864 goto xdr_error;
3865 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3866 goto xdr_error;
3867 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3868 goto xdr_error;
3869
3870 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3871 goto xdr_error;
3872 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3873 goto xdr_error;
3874
3875 status = verify_attr_len(xdr, savep, attrlen);
3876 xdr_error:
3877 dprintk("%s: xdr returned %d!\n", __func__, -status);
3878 return status;
3879 }
3880
3881 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3882 struct nfs_fattr *fattr, struct nfs_fh *fh,
3883 const struct nfs_server *server, int may_sleep)
3884 {
3885 int status;
3886 umode_t fmode = 0;
3887 uint64_t fileid;
3888 uint32_t type;
3889
3890 status = decode_attr_type(xdr, bitmap, &type);
3891 if (status < 0)
3892 goto xdr_error;
3893 fattr->mode = 0;
3894 if (status != 0) {
3895 fattr->mode |= nfs_type2fmt[type];
3896 fattr->valid |= status;
3897 }
3898
3899 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3900 if (status < 0)
3901 goto xdr_error;
3902 fattr->valid |= status;
3903
3904 status = decode_attr_size(xdr, bitmap, &fattr->size);
3905 if (status < 0)
3906 goto xdr_error;
3907 fattr->valid |= status;
3908
3909 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3910 if (status < 0)
3911 goto xdr_error;
3912 fattr->valid |= status;
3913
3914 status = decode_attr_error(xdr, bitmap);
3915 if (status < 0)
3916 goto xdr_error;
3917
3918 status = decode_attr_filehandle(xdr, bitmap, fh);
3919 if (status < 0)
3920 goto xdr_error;
3921
3922 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3923 if (status < 0)
3924 goto xdr_error;
3925 fattr->valid |= status;
3926
3927 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3928 struct nfs4_fs_locations,
3929 fattr));
3930 if (status < 0)
3931 goto xdr_error;
3932 fattr->valid |= status;
3933
3934 status = decode_attr_mode(xdr, bitmap, &fmode);
3935 if (status < 0)
3936 goto xdr_error;
3937 if (status != 0) {
3938 fattr->mode |= fmode;
3939 fattr->valid |= status;
3940 }
3941
3942 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3943 if (status < 0)
3944 goto xdr_error;
3945 fattr->valid |= status;
3946
3947 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
3948 if (status < 0)
3949 goto xdr_error;
3950 fattr->valid |= status;
3951
3952 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
3953 if (status < 0)
3954 goto xdr_error;
3955 fattr->valid |= status;
3956
3957 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3958 if (status < 0)
3959 goto xdr_error;
3960 fattr->valid |= status;
3961
3962 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3963 if (status < 0)
3964 goto xdr_error;
3965 fattr->valid |= status;
3966
3967 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3968 if (status < 0)
3969 goto xdr_error;
3970 fattr->valid |= status;
3971
3972 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3973 if (status < 0)
3974 goto xdr_error;
3975 fattr->valid |= status;
3976
3977 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3978 if (status < 0)
3979 goto xdr_error;
3980 fattr->valid |= status;
3981
3982 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3983 if (status < 0)
3984 goto xdr_error;
3985 if (status != 0 && !(fattr->valid & status)) {
3986 fattr->fileid = fileid;
3987 fattr->valid |= status;
3988 }
3989
3990 xdr_error:
3991 dprintk("%s: xdr returned %d\n", __func__, -status);
3992 return status;
3993 }
3994
3995 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3996 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3997 {
3998 __be32 *savep;
3999 uint32_t attrlen,
4000 bitmap[2] = {0};
4001 int status;
4002
4003 status = decode_op_hdr(xdr, OP_GETATTR);
4004 if (status < 0)
4005 goto xdr_error;
4006
4007 status = decode_attr_bitmap(xdr, bitmap);
4008 if (status < 0)
4009 goto xdr_error;
4010
4011 status = decode_attr_length(xdr, &attrlen, &savep);
4012 if (status < 0)
4013 goto xdr_error;
4014
4015 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4016 if (status < 0)
4017 goto xdr_error;
4018
4019 status = verify_attr_len(xdr, savep, attrlen);
4020 xdr_error:
4021 dprintk("%s: xdr returned %d\n", __func__, -status);
4022 return status;
4023 }
4024
4025 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4026 const struct nfs_server *server, int may_sleep)
4027 {
4028 return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4029 }
4030
4031 /*
4032 * Decode potentially multiple layout types. Currently we only support
4033 * one layout driver per file system.
4034 */
4035 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4036 uint32_t *layouttype)
4037 {
4038 uint32_t *p;
4039 int num;
4040
4041 p = xdr_inline_decode(xdr, 4);
4042 if (unlikely(!p))
4043 goto out_overflow;
4044 num = be32_to_cpup(p);
4045
4046 /* pNFS is not supported by the underlying file system */
4047 if (num == 0) {
4048 *layouttype = 0;
4049 return 0;
4050 }
4051 if (num > 1)
4052 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4053 "per filesystem not supported\n", __func__);
4054
4055 /* Decode and set first layout type, move xdr->p past unused types */
4056 p = xdr_inline_decode(xdr, num * 4);
4057 if (unlikely(!p))
4058 goto out_overflow;
4059 *layouttype = be32_to_cpup(p);
4060 return 0;
4061 out_overflow:
4062 print_overflow_msg(__func__, xdr);
4063 return -EIO;
4064 }
4065
4066 /*
4067 * The type of file system exported.
4068 * Note we must ensure that layouttype is set in any non-error case.
4069 */
4070 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4071 uint32_t *layouttype)
4072 {
4073 int status = 0;
4074
4075 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4076 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4077 return -EIO;
4078 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4079 status = decode_first_pnfs_layout_type(xdr, layouttype);
4080 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4081 } else
4082 *layouttype = 0;
4083 return status;
4084 }
4085
4086 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4087 {
4088 __be32 *savep;
4089 uint32_t attrlen, bitmap[2];
4090 int status;
4091
4092 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4093 goto xdr_error;
4094 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4095 goto xdr_error;
4096 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4097 goto xdr_error;
4098
4099 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4100
4101 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4102 goto xdr_error;
4103 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4104 goto xdr_error;
4105 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4106 goto xdr_error;
4107 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4108 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4109 goto xdr_error;
4110 fsinfo->wtpref = fsinfo->wtmax;
4111 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4112 if (status != 0)
4113 goto xdr_error;
4114 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4115 if (status != 0)
4116 goto xdr_error;
4117
4118 status = verify_attr_len(xdr, savep, attrlen);
4119 xdr_error:
4120 dprintk("%s: xdr returned %d!\n", __func__, -status);
4121 return status;
4122 }
4123
4124 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4125 {
4126 __be32 *p;
4127 uint32_t len;
4128 int status;
4129
4130 /* Zero handle first to allow comparisons */
4131 memset(fh, 0, sizeof(*fh));
4132
4133 status = decode_op_hdr(xdr, OP_GETFH);
4134 if (status)
4135 return status;
4136
4137 p = xdr_inline_decode(xdr, 4);
4138 if (unlikely(!p))
4139 goto out_overflow;
4140 len = be32_to_cpup(p);
4141 if (len > NFS4_FHSIZE)
4142 return -EIO;
4143 fh->size = len;
4144 p = xdr_inline_decode(xdr, len);
4145 if (unlikely(!p))
4146 goto out_overflow;
4147 memcpy(fh->data, p, len);
4148 return 0;
4149 out_overflow:
4150 print_overflow_msg(__func__, xdr);
4151 return -EIO;
4152 }
4153
4154 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4155 {
4156 int status;
4157
4158 status = decode_op_hdr(xdr, OP_LINK);
4159 if (status)
4160 return status;
4161 return decode_change_info(xdr, cinfo);
4162 }
4163
4164 /*
4165 * We create the owner, so we know a proper owner.id length is 4.
4166 */
4167 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4168 {
4169 uint64_t offset, length, clientid;
4170 __be32 *p;
4171 uint32_t namelen, type;
4172
4173 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4174 if (unlikely(!p))
4175 goto out_overflow;
4176 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4177 p = xdr_decode_hyper(p, &length);
4178 type = be32_to_cpup(p++); /* 4 byte read */
4179 if (fl != NULL) { /* manipulate file lock */
4180 fl->fl_start = (loff_t)offset;
4181 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4182 if (length == ~(uint64_t)0)
4183 fl->fl_end = OFFSET_MAX;
4184 fl->fl_type = F_WRLCK;
4185 if (type & 1)
4186 fl->fl_type = F_RDLCK;
4187 fl->fl_pid = 0;
4188 }
4189 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4190 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4191 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4192 if (likely(p))
4193 return -NFS4ERR_DENIED;
4194 out_overflow:
4195 print_overflow_msg(__func__, xdr);
4196 return -EIO;
4197 }
4198
4199 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4200 {
4201 int status;
4202
4203 status = decode_op_hdr(xdr, OP_LOCK);
4204 if (status == -EIO)
4205 goto out;
4206 if (status == 0) {
4207 status = decode_stateid(xdr, &res->stateid);
4208 if (unlikely(status))
4209 goto out;
4210 } else if (status == -NFS4ERR_DENIED)
4211 status = decode_lock_denied(xdr, NULL);
4212 if (res->open_seqid != NULL)
4213 nfs_increment_open_seqid(status, res->open_seqid);
4214 nfs_increment_lock_seqid(status, res->lock_seqid);
4215 out:
4216 return status;
4217 }
4218
4219 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4220 {
4221 int status;
4222 status = decode_op_hdr(xdr, OP_LOCKT);
4223 if (status == -NFS4ERR_DENIED)
4224 return decode_lock_denied(xdr, res->denied);
4225 return status;
4226 }
4227
4228 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4229 {
4230 int status;
4231
4232 status = decode_op_hdr(xdr, OP_LOCKU);
4233 if (status != -EIO)
4234 nfs_increment_lock_seqid(status, res->seqid);
4235 if (status == 0)
4236 status = decode_stateid(xdr, &res->stateid);
4237 return status;
4238 }
4239
4240 static int decode_release_lockowner(struct xdr_stream *xdr)
4241 {
4242 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4243 }
4244
4245 static int decode_lookup(struct xdr_stream *xdr)
4246 {
4247 return decode_op_hdr(xdr, OP_LOOKUP);
4248 }
4249
4250 /* This is too sick! */
4251 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4252 {
4253 __be32 *p;
4254 uint32_t limit_type, nblocks, blocksize;
4255
4256 p = xdr_inline_decode(xdr, 12);
4257 if (unlikely(!p))
4258 goto out_overflow;
4259 limit_type = be32_to_cpup(p++);
4260 switch (limit_type) {
4261 case 1:
4262 xdr_decode_hyper(p, maxsize);
4263 break;
4264 case 2:
4265 nblocks = be32_to_cpup(p++);
4266 blocksize = be32_to_cpup(p);
4267 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4268 }
4269 return 0;
4270 out_overflow:
4271 print_overflow_msg(__func__, xdr);
4272 return -EIO;
4273 }
4274
4275 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4276 {
4277 __be32 *p;
4278 uint32_t delegation_type;
4279 int status;
4280
4281 p = xdr_inline_decode(xdr, 4);
4282 if (unlikely(!p))
4283 goto out_overflow;
4284 delegation_type = be32_to_cpup(p);
4285 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4286 res->delegation_type = 0;
4287 return 0;
4288 }
4289 status = decode_stateid(xdr, &res->delegation);
4290 if (unlikely(status))
4291 return status;
4292 p = xdr_inline_decode(xdr, 4);
4293 if (unlikely(!p))
4294 goto out_overflow;
4295 res->do_recall = be32_to_cpup(p);
4296
4297 switch (delegation_type) {
4298 case NFS4_OPEN_DELEGATE_READ:
4299 res->delegation_type = FMODE_READ;
4300 break;
4301 case NFS4_OPEN_DELEGATE_WRITE:
4302 res->delegation_type = FMODE_WRITE|FMODE_READ;
4303 if (decode_space_limit(xdr, &res->maxsize) < 0)
4304 return -EIO;
4305 }
4306 return decode_ace(xdr, NULL, res->server->nfs_client);
4307 out_overflow:
4308 print_overflow_msg(__func__, xdr);
4309 return -EIO;
4310 }
4311
4312 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4313 {
4314 __be32 *p;
4315 uint32_t savewords, bmlen, i;
4316 int status;
4317
4318 status = decode_op_hdr(xdr, OP_OPEN);
4319 if (status != -EIO)
4320 nfs_increment_open_seqid(status, res->seqid);
4321 if (!status)
4322 status = decode_stateid(xdr, &res->stateid);
4323 if (unlikely(status))
4324 return status;
4325
4326 decode_change_info(xdr, &res->cinfo);
4327
4328 p = xdr_inline_decode(xdr, 8);
4329 if (unlikely(!p))
4330 goto out_overflow;
4331 res->rflags = be32_to_cpup(p++);
4332 bmlen = be32_to_cpup(p);
4333 if (bmlen > 10)
4334 goto xdr_error;
4335
4336 p = xdr_inline_decode(xdr, bmlen << 2);
4337 if (unlikely(!p))
4338 goto out_overflow;
4339 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4340 for (i = 0; i < savewords; ++i)
4341 res->attrset[i] = be32_to_cpup(p++);
4342 for (; i < NFS4_BITMAP_SIZE; i++)
4343 res->attrset[i] = 0;
4344
4345 return decode_delegation(xdr, res);
4346 xdr_error:
4347 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4348 return -EIO;
4349 out_overflow:
4350 print_overflow_msg(__func__, xdr);
4351 return -EIO;
4352 }
4353
4354 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4355 {
4356 int status;
4357
4358 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4359 if (status != -EIO)
4360 nfs_increment_open_seqid(status, res->seqid);
4361 if (!status)
4362 status = decode_stateid(xdr, &res->stateid);
4363 return status;
4364 }
4365
4366 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4367 {
4368 int status;
4369
4370 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4371 if (status != -EIO)
4372 nfs_increment_open_seqid(status, res->seqid);
4373 if (!status)
4374 status = decode_stateid(xdr, &res->stateid);
4375 return status;
4376 }
4377
4378 static int decode_putfh(struct xdr_stream *xdr)
4379 {
4380 return decode_op_hdr(xdr, OP_PUTFH);
4381 }
4382
4383 static int decode_putrootfh(struct xdr_stream *xdr)
4384 {
4385 return decode_op_hdr(xdr, OP_PUTROOTFH);
4386 }
4387
4388 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4389 {
4390 struct kvec *iov = req->rq_rcv_buf.head;
4391 __be32 *p;
4392 uint32_t count, eof, recvd, hdrlen;
4393 int status;
4394
4395 status = decode_op_hdr(xdr, OP_READ);
4396 if (status)
4397 return status;
4398 p = xdr_inline_decode(xdr, 8);
4399 if (unlikely(!p))
4400 goto out_overflow;
4401 eof = be32_to_cpup(p++);
4402 count = be32_to_cpup(p);
4403 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4404 recvd = req->rq_rcv_buf.len - hdrlen;
4405 if (count > recvd) {
4406 dprintk("NFS: server cheating in read reply: "
4407 "count %u > recvd %u\n", count, recvd);
4408 count = recvd;
4409 eof = 0;
4410 }
4411 xdr_read_pages(xdr, count);
4412 res->eof = eof;
4413 res->count = count;
4414 return 0;
4415 out_overflow:
4416 print_overflow_msg(__func__, xdr);
4417 return -EIO;
4418 }
4419
4420 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4421 {
4422 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4423 struct kvec *iov = rcvbuf->head;
4424 size_t hdrlen;
4425 u32 recvd, pglen = rcvbuf->page_len;
4426 int status;
4427
4428 status = decode_op_hdr(xdr, OP_READDIR);
4429 if (!status)
4430 status = decode_verifier(xdr, readdir->verifier.data);
4431 if (unlikely(status))
4432 return status;
4433 dprintk("%s: verifier = %08x:%08x\n",
4434 __func__,
4435 ((u32 *)readdir->verifier.data)[0],
4436 ((u32 *)readdir->verifier.data)[1]);
4437
4438
4439 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4440 recvd = rcvbuf->len - hdrlen;
4441 if (pglen > recvd)
4442 pglen = recvd;
4443 xdr_read_pages(xdr, pglen);
4444
4445
4446 return pglen;
4447 }
4448
4449 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4450 {
4451 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4452 struct kvec *iov = rcvbuf->head;
4453 size_t hdrlen;
4454 u32 len, recvd;
4455 __be32 *p;
4456 int status;
4457
4458 status = decode_op_hdr(xdr, OP_READLINK);
4459 if (status)
4460 return status;
4461
4462 /* Convert length of symlink */
4463 p = xdr_inline_decode(xdr, 4);
4464 if (unlikely(!p))
4465 goto out_overflow;
4466 len = be32_to_cpup(p);
4467 if (len >= rcvbuf->page_len || len <= 0) {
4468 dprintk("nfs: server returned giant symlink!\n");
4469 return -ENAMETOOLONG;
4470 }
4471 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4472 recvd = req->rq_rcv_buf.len - hdrlen;
4473 if (recvd < len) {
4474 dprintk("NFS: server cheating in readlink reply: "
4475 "count %u > recvd %u\n", len, recvd);
4476 return -EIO;
4477 }
4478 xdr_read_pages(xdr, len);
4479 /*
4480 * The XDR encode routine has set things up so that
4481 * the link text will be copied directly into the
4482 * buffer. We just have to do overflow-checking,
4483 * and and null-terminate the text (the VFS expects
4484 * null-termination).
4485 */
4486 xdr_terminate_string(rcvbuf, len);
4487 return 0;
4488 out_overflow:
4489 print_overflow_msg(__func__, xdr);
4490 return -EIO;
4491 }
4492
4493 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4494 {
4495 int status;
4496
4497 status = decode_op_hdr(xdr, OP_REMOVE);
4498 if (status)
4499 goto out;
4500 status = decode_change_info(xdr, cinfo);
4501 out:
4502 return status;
4503 }
4504
4505 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4506 struct nfs4_change_info *new_cinfo)
4507 {
4508 int status;
4509
4510 status = decode_op_hdr(xdr, OP_RENAME);
4511 if (status)
4512 goto out;
4513 if ((status = decode_change_info(xdr, old_cinfo)))
4514 goto out;
4515 status = decode_change_info(xdr, new_cinfo);
4516 out:
4517 return status;
4518 }
4519
4520 static int decode_renew(struct xdr_stream *xdr)
4521 {
4522 return decode_op_hdr(xdr, OP_RENEW);
4523 }
4524
4525 static int
4526 decode_restorefh(struct xdr_stream *xdr)
4527 {
4528 return decode_op_hdr(xdr, OP_RESTOREFH);
4529 }
4530
4531 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4532 size_t *acl_len)
4533 {
4534 __be32 *savep;
4535 uint32_t attrlen,
4536 bitmap[2] = {0};
4537 struct kvec *iov = req->rq_rcv_buf.head;
4538 int status;
4539
4540 *acl_len = 0;
4541 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4542 goto out;
4543 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4544 goto out;
4545 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4546 goto out;
4547
4548 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4549 return -EIO;
4550 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4551 size_t hdrlen;
4552 u32 recvd;
4553
4554 /* We ignore &savep and don't do consistency checks on
4555 * the attr length. Let userspace figure it out.... */
4556 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4557 recvd = req->rq_rcv_buf.len - hdrlen;
4558 if (attrlen > recvd) {
4559 dprintk("NFS: server cheating in getattr"
4560 " acl reply: attrlen %u > recvd %u\n",
4561 attrlen, recvd);
4562 return -EINVAL;
4563 }
4564 xdr_read_pages(xdr, attrlen);
4565 *acl_len = attrlen;
4566 } else
4567 status = -EOPNOTSUPP;
4568
4569 out:
4570 return status;
4571 }
4572
4573 static int
4574 decode_savefh(struct xdr_stream *xdr)
4575 {
4576 return decode_op_hdr(xdr, OP_SAVEFH);
4577 }
4578
4579 static int decode_setattr(struct xdr_stream *xdr)
4580 {
4581 __be32 *p;
4582 uint32_t bmlen;
4583 int status;
4584
4585 status = decode_op_hdr(xdr, OP_SETATTR);
4586 if (status)
4587 return status;
4588 p = xdr_inline_decode(xdr, 4);
4589 if (unlikely(!p))
4590 goto out_overflow;
4591 bmlen = be32_to_cpup(p);
4592 p = xdr_inline_decode(xdr, bmlen << 2);
4593 if (likely(p))
4594 return 0;
4595 out_overflow:
4596 print_overflow_msg(__func__, xdr);
4597 return -EIO;
4598 }
4599
4600 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4601 {
4602 __be32 *p;
4603 uint32_t opnum;
4604 int32_t nfserr;
4605
4606 p = xdr_inline_decode(xdr, 8);
4607 if (unlikely(!p))
4608 goto out_overflow;
4609 opnum = be32_to_cpup(p++);
4610 if (opnum != OP_SETCLIENTID) {
4611 dprintk("nfs: decode_setclientid: Server returned operation"
4612 " %d\n", opnum);
4613 return -EIO;
4614 }
4615 nfserr = be32_to_cpup(p);
4616 if (nfserr == NFS_OK) {
4617 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4618 if (unlikely(!p))
4619 goto out_overflow;
4620 p = xdr_decode_hyper(p, &res->clientid);
4621 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4622 } else if (nfserr == NFSERR_CLID_INUSE) {
4623 uint32_t len;
4624
4625 /* skip netid string */
4626 p = xdr_inline_decode(xdr, 4);
4627 if (unlikely(!p))
4628 goto out_overflow;
4629 len = be32_to_cpup(p);
4630 p = xdr_inline_decode(xdr, len);
4631 if (unlikely(!p))
4632 goto out_overflow;
4633
4634 /* skip uaddr string */
4635 p = xdr_inline_decode(xdr, 4);
4636 if (unlikely(!p))
4637 goto out_overflow;
4638 len = be32_to_cpup(p);
4639 p = xdr_inline_decode(xdr, len);
4640 if (unlikely(!p))
4641 goto out_overflow;
4642 return -NFSERR_CLID_INUSE;
4643 } else
4644 return nfs4_stat_to_errno(nfserr);
4645
4646 return 0;
4647 out_overflow:
4648 print_overflow_msg(__func__, xdr);
4649 return -EIO;
4650 }
4651
4652 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4653 {
4654 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4655 }
4656
4657 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4658 {
4659 __be32 *p;
4660 int status;
4661
4662 status = decode_op_hdr(xdr, OP_WRITE);
4663 if (status)
4664 return status;
4665
4666 p = xdr_inline_decode(xdr, 16);
4667 if (unlikely(!p))
4668 goto out_overflow;
4669 res->count = be32_to_cpup(p++);
4670 res->verf->committed = be32_to_cpup(p++);
4671 memcpy(res->verf->verifier, p, 8);
4672 return 0;
4673 out_overflow:
4674 print_overflow_msg(__func__, xdr);
4675 return -EIO;
4676 }
4677
4678 static int decode_delegreturn(struct xdr_stream *xdr)
4679 {
4680 return decode_op_hdr(xdr, OP_DELEGRETURN);
4681 }
4682
4683 #if defined(CONFIG_NFS_V4_1)
4684 static int decode_exchange_id(struct xdr_stream *xdr,
4685 struct nfs41_exchange_id_res *res)
4686 {
4687 __be32 *p;
4688 uint32_t dummy;
4689 char *dummy_str;
4690 int status;
4691 struct nfs_client *clp = res->client;
4692
4693 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4694 if (status)
4695 return status;
4696
4697 p = xdr_inline_decode(xdr, 8);
4698 if (unlikely(!p))
4699 goto out_overflow;
4700 xdr_decode_hyper(p, &clp->cl_clientid);
4701 p = xdr_inline_decode(xdr, 12);
4702 if (unlikely(!p))
4703 goto out_overflow;
4704 clp->cl_seqid = be32_to_cpup(p++);
4705 clp->cl_exchange_flags = be32_to_cpup(p++);
4706
4707 /* We ask for SP4_NONE */
4708 dummy = be32_to_cpup(p);
4709 if (dummy != SP4_NONE)
4710 return -EIO;
4711
4712 /* Throw away minor_id */
4713 p = xdr_inline_decode(xdr, 8);
4714 if (unlikely(!p))
4715 goto out_overflow;
4716
4717 /* Throw away Major id */
4718 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4719 if (unlikely(status))
4720 return status;
4721
4722 /* Throw away server_scope */
4723 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4724 if (unlikely(status))
4725 return status;
4726
4727 /* Throw away Implementation id array */
4728 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4729 if (unlikely(status))
4730 return status;
4731
4732 return 0;
4733 out_overflow:
4734 print_overflow_msg(__func__, xdr);
4735 return -EIO;
4736 }
4737
4738 static int decode_chan_attrs(struct xdr_stream *xdr,
4739 struct nfs4_channel_attrs *attrs)
4740 {
4741 __be32 *p;
4742 u32 nr_attrs;
4743
4744 p = xdr_inline_decode(xdr, 28);
4745 if (unlikely(!p))
4746 goto out_overflow;
4747 attrs->headerpadsz = be32_to_cpup(p++);
4748 attrs->max_rqst_sz = be32_to_cpup(p++);
4749 attrs->max_resp_sz = be32_to_cpup(p++);
4750 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4751 attrs->max_ops = be32_to_cpup(p++);
4752 attrs->max_reqs = be32_to_cpup(p++);
4753 nr_attrs = be32_to_cpup(p);
4754 if (unlikely(nr_attrs > 1)) {
4755 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4756 __func__, nr_attrs);
4757 return -EINVAL;
4758 }
4759 if (nr_attrs == 1) {
4760 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4761 if (unlikely(!p))
4762 goto out_overflow;
4763 }
4764 return 0;
4765 out_overflow:
4766 print_overflow_msg(__func__, xdr);
4767 return -EIO;
4768 }
4769
4770 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4771 {
4772 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4773 }
4774
4775 static int decode_create_session(struct xdr_stream *xdr,
4776 struct nfs41_create_session_res *res)
4777 {
4778 __be32 *p;
4779 int status;
4780 struct nfs_client *clp = res->client;
4781 struct nfs4_session *session = clp->cl_session;
4782
4783 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4784 if (!status)
4785 status = decode_sessionid(xdr, &session->sess_id);
4786 if (unlikely(status))
4787 return status;
4788
4789 /* seqid, flags */
4790 p = xdr_inline_decode(xdr, 8);
4791 if (unlikely(!p))
4792 goto out_overflow;
4793 clp->cl_seqid = be32_to_cpup(p++);
4794 session->flags = be32_to_cpup(p);
4795
4796 /* Channel attributes */
4797 status = decode_chan_attrs(xdr, &session->fc_attrs);
4798 if (!status)
4799 status = decode_chan_attrs(xdr, &session->bc_attrs);
4800 return status;
4801 out_overflow:
4802 print_overflow_msg(__func__, xdr);
4803 return -EIO;
4804 }
4805
4806 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4807 {
4808 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4809 }
4810
4811 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4812 {
4813 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4814 }
4815 #endif /* CONFIG_NFS_V4_1 */
4816
4817 static int decode_sequence(struct xdr_stream *xdr,
4818 struct nfs4_sequence_res *res,
4819 struct rpc_rqst *rqstp)
4820 {
4821 #if defined(CONFIG_NFS_V4_1)
4822 struct nfs4_sessionid id;
4823 u32 dummy;
4824 int status;
4825 __be32 *p;
4826
4827 if (!res->sr_session)
4828 return 0;
4829
4830 status = decode_op_hdr(xdr, OP_SEQUENCE);
4831 if (!status)
4832 status = decode_sessionid(xdr, &id);
4833 if (unlikely(status))
4834 goto out_err;
4835
4836 /*
4837 * If the server returns different values for sessionID, slotID or
4838 * sequence number, the server is looney tunes.
4839 */
4840 status = -EREMOTEIO;
4841
4842 if (memcmp(id.data, res->sr_session->sess_id.data,
4843 NFS4_MAX_SESSIONID_LEN)) {
4844 dprintk("%s Invalid session id\n", __func__);
4845 goto out_err;
4846 }
4847
4848 p = xdr_inline_decode(xdr, 20);
4849 if (unlikely(!p))
4850 goto out_overflow;
4851
4852 /* seqid */
4853 dummy = be32_to_cpup(p++);
4854 if (dummy != res->sr_slot->seq_nr) {
4855 dprintk("%s Invalid sequence number\n", __func__);
4856 goto out_err;
4857 }
4858 /* slot id */
4859 dummy = be32_to_cpup(p++);
4860 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4861 dprintk("%s Invalid slot id\n", __func__);
4862 goto out_err;
4863 }
4864 /* highest slot id - currently not processed */
4865 dummy = be32_to_cpup(p++);
4866 /* target highest slot id - currently not processed */
4867 dummy = be32_to_cpup(p++);
4868 /* result flags */
4869 res->sr_status_flags = be32_to_cpup(p);
4870 status = 0;
4871 out_err:
4872 res->sr_status = status;
4873 return status;
4874 out_overflow:
4875 print_overflow_msg(__func__, xdr);
4876 status = -EIO;
4877 goto out_err;
4878 #else /* CONFIG_NFS_V4_1 */
4879 return 0;
4880 #endif /* CONFIG_NFS_V4_1 */
4881 }
4882
4883 #if defined(CONFIG_NFS_V4_1)
4884
4885 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4886 struct pnfs_device *pdev)
4887 {
4888 __be32 *p;
4889 uint32_t len, type;
4890 int status;
4891
4892 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4893 if (status) {
4894 if (status == -ETOOSMALL) {
4895 p = xdr_inline_decode(xdr, 4);
4896 if (unlikely(!p))
4897 goto out_overflow;
4898 pdev->mincount = be32_to_cpup(p);
4899 dprintk("%s: Min count too small. mincnt = %u\n",
4900 __func__, pdev->mincount);
4901 }
4902 return status;
4903 }
4904
4905 p = xdr_inline_decode(xdr, 8);
4906 if (unlikely(!p))
4907 goto out_overflow;
4908 type = be32_to_cpup(p++);
4909 if (type != pdev->layout_type) {
4910 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4911 __func__, pdev->layout_type, type);
4912 return -EINVAL;
4913 }
4914 /*
4915 * Get the length of the opaque device_addr4. xdr_read_pages places
4916 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4917 * and places the remaining xdr data in xdr_buf->tail
4918 */
4919 pdev->mincount = be32_to_cpup(p);
4920 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4921
4922 /* Parse notification bitmap, verifying that it is zero. */
4923 p = xdr_inline_decode(xdr, 4);
4924 if (unlikely(!p))
4925 goto out_overflow;
4926 len = be32_to_cpup(p);
4927 if (len) {
4928 uint32_t i;
4929
4930 p = xdr_inline_decode(xdr, 4 * len);
4931 if (unlikely(!p))
4932 goto out_overflow;
4933 for (i = 0; i < len; i++, p++) {
4934 if (be32_to_cpup(p)) {
4935 dprintk("%s: notifications not supported\n",
4936 __func__);
4937 return -EIO;
4938 }
4939 }
4940 }
4941 return 0;
4942 out_overflow:
4943 print_overflow_msg(__func__, xdr);
4944 return -EIO;
4945 }
4946
4947 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
4948 struct nfs4_layoutget_res *res)
4949 {
4950 __be32 *p;
4951 int status;
4952 u32 layout_count;
4953
4954 status = decode_op_hdr(xdr, OP_LAYOUTGET);
4955 if (status)
4956 return status;
4957 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
4958 if (unlikely(!p))
4959 goto out_overflow;
4960 res->return_on_close = be32_to_cpup(p++);
4961 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
4962 layout_count = be32_to_cpup(p);
4963 if (!layout_count) {
4964 dprintk("%s: server responded with empty layout array\n",
4965 __func__);
4966 return -EINVAL;
4967 }
4968
4969 p = xdr_inline_decode(xdr, 24);
4970 if (unlikely(!p))
4971 goto out_overflow;
4972 p = xdr_decode_hyper(p, &res->range.offset);
4973 p = xdr_decode_hyper(p, &res->range.length);
4974 res->range.iomode = be32_to_cpup(p++);
4975 res->type = be32_to_cpup(p++);
4976
4977 status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
4978 if (unlikely(status))
4979 return status;
4980
4981 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
4982 __func__,
4983 (unsigned long)res->range.offset,
4984 (unsigned long)res->range.length,
4985 res->range.iomode,
4986 res->type,
4987 res->layout.len);
4988
4989 /* nfs4_proc_layoutget allocated a single page */
4990 if (res->layout.len > PAGE_SIZE)
4991 return -ENOMEM;
4992 memcpy(res->layout.buf, p, res->layout.len);
4993
4994 if (layout_count > 1) {
4995 /* We only handle a length one array at the moment. Any
4996 * further entries are just ignored. Note that this means
4997 * the client may see a response that is less than the
4998 * minimum it requested.
4999 */
5000 dprintk("%s: server responded with %d layouts, dropping tail\n",
5001 __func__, layout_count);
5002 }
5003
5004 return 0;
5005 out_overflow:
5006 print_overflow_msg(__func__, xdr);
5007 return -EIO;
5008 }
5009 #endif /* CONFIG_NFS_V4_1 */
5010
5011 /*
5012 * END OF "GENERIC" DECODE ROUTINES.
5013 */
5014
5015 /*
5016 * Decode OPEN_DOWNGRADE response
5017 */
5018 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5019 struct xdr_stream *xdr,
5020 struct nfs_closeres *res)
5021 {
5022 struct compound_hdr hdr;
5023 int status;
5024
5025 status = decode_compound_hdr(xdr, &hdr);
5026 if (status)
5027 goto out;
5028 status = decode_sequence(xdr, &res->seq_res, rqstp);
5029 if (status)
5030 goto out;
5031 status = decode_putfh(xdr);
5032 if (status)
5033 goto out;
5034 status = decode_open_downgrade(xdr, res);
5035 if (status != 0)
5036 goto out;
5037 decode_getfattr(xdr, res->fattr, res->server,
5038 !RPC_IS_ASYNC(rqstp->rq_task));
5039 out:
5040 return status;
5041 }
5042
5043 /*
5044 * Decode ACCESS response
5045 */
5046 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5047 struct nfs4_accessres *res)
5048 {
5049 struct compound_hdr hdr;
5050 int status;
5051
5052 status = decode_compound_hdr(xdr, &hdr);
5053 if (status)
5054 goto out;
5055 status = decode_sequence(xdr, &res->seq_res, rqstp);
5056 if (status)
5057 goto out;
5058 status = decode_putfh(xdr);
5059 if (status != 0)
5060 goto out;
5061 status = decode_access(xdr, res);
5062 if (status != 0)
5063 goto out;
5064 decode_getfattr(xdr, res->fattr, res->server,
5065 !RPC_IS_ASYNC(rqstp->rq_task));
5066 out:
5067 return status;
5068 }
5069
5070 /*
5071 * Decode LOOKUP response
5072 */
5073 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5074 struct nfs4_lookup_res *res)
5075 {
5076 struct compound_hdr hdr;
5077 int status;
5078
5079 status = decode_compound_hdr(xdr, &hdr);
5080 if (status)
5081 goto out;
5082 status = decode_sequence(xdr, &res->seq_res, rqstp);
5083 if (status)
5084 goto out;
5085 status = decode_putfh(xdr);
5086 if (status)
5087 goto out;
5088 status = decode_lookup(xdr);
5089 if (status)
5090 goto out;
5091 status = decode_getfh(xdr, res->fh);
5092 if (status)
5093 goto out;
5094 status = decode_getfattr(xdr, res->fattr, res->server
5095 ,!RPC_IS_ASYNC(rqstp->rq_task));
5096 out:
5097 return status;
5098 }
5099
5100 /*
5101 * Decode LOOKUP_ROOT response
5102 */
5103 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5104 struct xdr_stream *xdr,
5105 struct nfs4_lookup_res *res)
5106 {
5107 struct compound_hdr hdr;
5108 int status;
5109
5110 status = decode_compound_hdr(xdr, &hdr);
5111 if (status)
5112 goto out;
5113 status = decode_sequence(xdr, &res->seq_res, rqstp);
5114 if (status)
5115 goto out;
5116 status = decode_putrootfh(xdr);
5117 if (status)
5118 goto out;
5119 status = decode_getfh(xdr, res->fh);
5120 if (status == 0)
5121 status = decode_getfattr(xdr, res->fattr, res->server,
5122 !RPC_IS_ASYNC(rqstp->rq_task));
5123 out:
5124 return status;
5125 }
5126
5127 /*
5128 * Decode REMOVE response
5129 */
5130 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5131 struct nfs_removeres *res)
5132 {
5133 struct compound_hdr hdr;
5134 int status;
5135
5136 status = decode_compound_hdr(xdr, &hdr);
5137 if (status)
5138 goto out;
5139 status = decode_sequence(xdr, &res->seq_res, rqstp);
5140 if (status)
5141 goto out;
5142 status = decode_putfh(xdr);
5143 if (status)
5144 goto out;
5145 status = decode_remove(xdr, &res->cinfo);
5146 if (status)
5147 goto out;
5148 decode_getfattr(xdr, res->dir_attr, res->server,
5149 !RPC_IS_ASYNC(rqstp->rq_task));
5150 out:
5151 return status;
5152 }
5153
5154 /*
5155 * Decode RENAME response
5156 */
5157 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5158 struct nfs_renameres *res)
5159 {
5160 struct compound_hdr hdr;
5161 int status;
5162
5163 status = decode_compound_hdr(xdr, &hdr);
5164 if (status)
5165 goto out;
5166 status = decode_sequence(xdr, &res->seq_res, rqstp);
5167 if (status)
5168 goto out;
5169 status = decode_putfh(xdr);
5170 if (status)
5171 goto out;
5172 status = decode_savefh(xdr);
5173 if (status)
5174 goto out;
5175 status = decode_putfh(xdr);
5176 if (status)
5177 goto out;
5178 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5179 if (status)
5180 goto out;
5181 /* Current FH is target directory */
5182 if (decode_getfattr(xdr, res->new_fattr, res->server,
5183 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5184 goto out;
5185 status = decode_restorefh(xdr);
5186 if (status)
5187 goto out;
5188 decode_getfattr(xdr, res->old_fattr, res->server,
5189 !RPC_IS_ASYNC(rqstp->rq_task));
5190 out:
5191 return status;
5192 }
5193
5194 /*
5195 * Decode LINK response
5196 */
5197 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5198 struct nfs4_link_res *res)
5199 {
5200 struct compound_hdr hdr;
5201 int status;
5202
5203 status = decode_compound_hdr(xdr, &hdr);
5204 if (status)
5205 goto out;
5206 status = decode_sequence(xdr, &res->seq_res, rqstp);
5207 if (status)
5208 goto out;
5209 status = decode_putfh(xdr);
5210 if (status)
5211 goto out;
5212 status = decode_savefh(xdr);
5213 if (status)
5214 goto out;
5215 status = decode_putfh(xdr);
5216 if (status)
5217 goto out;
5218 status = decode_link(xdr, &res->cinfo);
5219 if (status)
5220 goto out;
5221 /*
5222 * Note order: OP_LINK leaves the directory as the current
5223 * filehandle.
5224 */
5225 if (decode_getfattr(xdr, res->dir_attr, res->server,
5226 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5227 goto out;
5228 status = decode_restorefh(xdr);
5229 if (status)
5230 goto out;
5231 decode_getfattr(xdr, res->fattr, res->server,
5232 !RPC_IS_ASYNC(rqstp->rq_task));
5233 out:
5234 return status;
5235 }
5236
5237 /*
5238 * Decode CREATE response
5239 */
5240 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5241 struct nfs4_create_res *res)
5242 {
5243 struct compound_hdr hdr;
5244 int status;
5245
5246 status = decode_compound_hdr(xdr, &hdr);
5247 if (status)
5248 goto out;
5249 status = decode_sequence(xdr, &res->seq_res, rqstp);
5250 if (status)
5251 goto out;
5252 status = decode_putfh(xdr);
5253 if (status)
5254 goto out;
5255 status = decode_savefh(xdr);
5256 if (status)
5257 goto out;
5258 status = decode_create(xdr, &res->dir_cinfo);
5259 if (status)
5260 goto out;
5261 status = decode_getfh(xdr, res->fh);
5262 if (status)
5263 goto out;
5264 if (decode_getfattr(xdr, res->fattr, res->server,
5265 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5266 goto out;
5267 status = decode_restorefh(xdr);
5268 if (status)
5269 goto out;
5270 decode_getfattr(xdr, res->dir_fattr, res->server,
5271 !RPC_IS_ASYNC(rqstp->rq_task));
5272 out:
5273 return status;
5274 }
5275
5276 /*
5277 * Decode SYMLINK response
5278 */
5279 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5280 struct nfs4_create_res *res)
5281 {
5282 return nfs4_xdr_dec_create(rqstp, xdr, res);
5283 }
5284
5285 /*
5286 * Decode GETATTR response
5287 */
5288 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5289 struct nfs4_getattr_res *res)
5290 {
5291 struct compound_hdr hdr;
5292 int status;
5293
5294 status = decode_compound_hdr(xdr, &hdr);
5295 if (status)
5296 goto out;
5297 status = decode_sequence(xdr, &res->seq_res, rqstp);
5298 if (status)
5299 goto out;
5300 status = decode_putfh(xdr);
5301 if (status)
5302 goto out;
5303 status = decode_getfattr(xdr, res->fattr, res->server,
5304 !RPC_IS_ASYNC(rqstp->rq_task));
5305 out:
5306 return status;
5307 }
5308
5309 /*
5310 * Encode an SETACL request
5311 */
5312 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5313 struct nfs_setaclargs *args)
5314 {
5315 struct compound_hdr hdr = {
5316 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5317 };
5318
5319 encode_compound_hdr(xdr, req, &hdr);
5320 encode_sequence(xdr, &args->seq_args, &hdr);
5321 encode_putfh(xdr, args->fh, &hdr);
5322 encode_setacl(xdr, args, &hdr);
5323 encode_nops(&hdr);
5324 }
5325
5326 /*
5327 * Decode SETACL response
5328 */
5329 static int
5330 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5331 struct nfs_setaclres *res)
5332 {
5333 struct compound_hdr hdr;
5334 int status;
5335
5336 status = decode_compound_hdr(xdr, &hdr);
5337 if (status)
5338 goto out;
5339 status = decode_sequence(xdr, &res->seq_res, rqstp);
5340 if (status)
5341 goto out;
5342 status = decode_putfh(xdr);
5343 if (status)
5344 goto out;
5345 status = decode_setattr(xdr);
5346 out:
5347 return status;
5348 }
5349
5350 /*
5351 * Decode GETACL response
5352 */
5353 static int
5354 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5355 struct nfs_getaclres *res)
5356 {
5357 struct compound_hdr hdr;
5358 int status;
5359
5360 status = decode_compound_hdr(xdr, &hdr);
5361 if (status)
5362 goto out;
5363 status = decode_sequence(xdr, &res->seq_res, rqstp);
5364 if (status)
5365 goto out;
5366 status = decode_putfh(xdr);
5367 if (status)
5368 goto out;
5369 status = decode_getacl(xdr, rqstp, &res->acl_len);
5370
5371 out:
5372 return status;
5373 }
5374
5375 /*
5376 * Decode CLOSE response
5377 */
5378 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5379 struct nfs_closeres *res)
5380 {
5381 struct compound_hdr hdr;
5382 int status;
5383
5384 status = decode_compound_hdr(xdr, &hdr);
5385 if (status)
5386 goto out;
5387 status = decode_sequence(xdr, &res->seq_res, rqstp);
5388 if (status)
5389 goto out;
5390 status = decode_putfh(xdr);
5391 if (status)
5392 goto out;
5393 status = decode_close(xdr, res);
5394 if (status != 0)
5395 goto out;
5396 /*
5397 * Note: Server may do delete on close for this file
5398 * in which case the getattr call will fail with
5399 * an ESTALE error. Shouldn't be a problem,
5400 * though, since fattr->valid will remain unset.
5401 */
5402 decode_getfattr(xdr, res->fattr, res->server,
5403 !RPC_IS_ASYNC(rqstp->rq_task));
5404 out:
5405 return status;
5406 }
5407
5408 /*
5409 * Decode OPEN response
5410 */
5411 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5412 struct nfs_openres *res)
5413 {
5414 struct compound_hdr hdr;
5415 int status;
5416
5417 status = decode_compound_hdr(xdr, &hdr);
5418 if (status)
5419 goto out;
5420 status = decode_sequence(xdr, &res->seq_res, rqstp);
5421 if (status)
5422 goto out;
5423 status = decode_putfh(xdr);
5424 if (status)
5425 goto out;
5426 status = decode_savefh(xdr);
5427 if (status)
5428 goto out;
5429 status = decode_open(xdr, res);
5430 if (status)
5431 goto out;
5432 if (decode_getfh(xdr, &res->fh) != 0)
5433 goto out;
5434 if (decode_getfattr(xdr, res->f_attr, res->server,
5435 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5436 goto out;
5437 if (decode_restorefh(xdr) != 0)
5438 goto out;
5439 decode_getfattr(xdr, res->dir_attr, res->server,
5440 !RPC_IS_ASYNC(rqstp->rq_task));
5441 out:
5442 return status;
5443 }
5444
5445 /*
5446 * Decode OPEN_CONFIRM response
5447 */
5448 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5449 struct xdr_stream *xdr,
5450 struct nfs_open_confirmres *res)
5451 {
5452 struct compound_hdr hdr;
5453 int status;
5454
5455 status = decode_compound_hdr(xdr, &hdr);
5456 if (status)
5457 goto out;
5458 status = decode_putfh(xdr);
5459 if (status)
5460 goto out;
5461 status = decode_open_confirm(xdr, res);
5462 out:
5463 return status;
5464 }
5465
5466 /*
5467 * Decode OPEN response
5468 */
5469 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5470 struct xdr_stream *xdr,
5471 struct nfs_openres *res)
5472 {
5473 struct compound_hdr hdr;
5474 int status;
5475
5476 status = decode_compound_hdr(xdr, &hdr);
5477 if (status)
5478 goto out;
5479 status = decode_sequence(xdr, &res->seq_res, rqstp);
5480 if (status)
5481 goto out;
5482 status = decode_putfh(xdr);
5483 if (status)
5484 goto out;
5485 status = decode_open(xdr, res);
5486 if (status)
5487 goto out;
5488 decode_getfattr(xdr, res->f_attr, res->server,
5489 !RPC_IS_ASYNC(rqstp->rq_task));
5490 out:
5491 return status;
5492 }
5493
5494 /*
5495 * Decode SETATTR response
5496 */
5497 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5498 struct xdr_stream *xdr,
5499 struct nfs_setattrres *res)
5500 {
5501 struct compound_hdr hdr;
5502 int status;
5503
5504 status = decode_compound_hdr(xdr, &hdr);
5505 if (status)
5506 goto out;
5507 status = decode_sequence(xdr, &res->seq_res, rqstp);
5508 if (status)
5509 goto out;
5510 status = decode_putfh(xdr);
5511 if (status)
5512 goto out;
5513 status = decode_setattr(xdr);
5514 if (status)
5515 goto out;
5516 decode_getfattr(xdr, res->fattr, res->server,
5517 !RPC_IS_ASYNC(rqstp->rq_task));
5518 out:
5519 return status;
5520 }
5521
5522 /*
5523 * Decode LOCK response
5524 */
5525 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5526 struct nfs_lock_res *res)
5527 {
5528 struct compound_hdr hdr;
5529 int status;
5530
5531 status = decode_compound_hdr(xdr, &hdr);
5532 if (status)
5533 goto out;
5534 status = decode_sequence(xdr, &res->seq_res, rqstp);
5535 if (status)
5536 goto out;
5537 status = decode_putfh(xdr);
5538 if (status)
5539 goto out;
5540 status = decode_lock(xdr, res);
5541 out:
5542 return status;
5543 }
5544
5545 /*
5546 * Decode LOCKT response
5547 */
5548 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5549 struct nfs_lockt_res *res)
5550 {
5551 struct compound_hdr hdr;
5552 int status;
5553
5554 status = decode_compound_hdr(xdr, &hdr);
5555 if (status)
5556 goto out;
5557 status = decode_sequence(xdr, &res->seq_res, rqstp);
5558 if (status)
5559 goto out;
5560 status = decode_putfh(xdr);
5561 if (status)
5562 goto out;
5563 status = decode_lockt(xdr, res);
5564 out:
5565 return status;
5566 }
5567
5568 /*
5569 * Decode LOCKU response
5570 */
5571 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5572 struct nfs_locku_res *res)
5573 {
5574 struct compound_hdr hdr;
5575 int status;
5576
5577 status = decode_compound_hdr(xdr, &hdr);
5578 if (status)
5579 goto out;
5580 status = decode_sequence(xdr, &res->seq_res, rqstp);
5581 if (status)
5582 goto out;
5583 status = decode_putfh(xdr);
5584 if (status)
5585 goto out;
5586 status = decode_locku(xdr, res);
5587 out:
5588 return status;
5589 }
5590
5591 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5592 struct xdr_stream *xdr, void *dummy)
5593 {
5594 struct compound_hdr hdr;
5595 int status;
5596
5597 status = decode_compound_hdr(xdr, &hdr);
5598 if (!status)
5599 status = decode_release_lockowner(xdr);
5600 return status;
5601 }
5602
5603 /*
5604 * Decode READLINK response
5605 */
5606 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5607 struct xdr_stream *xdr,
5608 struct nfs4_readlink_res *res)
5609 {
5610 struct compound_hdr hdr;
5611 int status;
5612
5613 status = decode_compound_hdr(xdr, &hdr);
5614 if (status)
5615 goto out;
5616 status = decode_sequence(xdr, &res->seq_res, rqstp);
5617 if (status)
5618 goto out;
5619 status = decode_putfh(xdr);
5620 if (status)
5621 goto out;
5622 status = decode_readlink(xdr, rqstp);
5623 out:
5624 return status;
5625 }
5626
5627 /*
5628 * Decode READDIR response
5629 */
5630 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5631 struct nfs4_readdir_res *res)
5632 {
5633 struct compound_hdr hdr;
5634 int status;
5635
5636 status = decode_compound_hdr(xdr, &hdr);
5637 if (status)
5638 goto out;
5639 status = decode_sequence(xdr, &res->seq_res, rqstp);
5640 if (status)
5641 goto out;
5642 status = decode_putfh(xdr);
5643 if (status)
5644 goto out;
5645 status = decode_readdir(xdr, rqstp, res);
5646 out:
5647 return status;
5648 }
5649
5650 /*
5651 * Decode Read response
5652 */
5653 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5654 struct nfs_readres *res)
5655 {
5656 struct compound_hdr hdr;
5657 int status;
5658
5659 status = decode_compound_hdr(xdr, &hdr);
5660 if (status)
5661 goto out;
5662 status = decode_sequence(xdr, &res->seq_res, rqstp);
5663 if (status)
5664 goto out;
5665 status = decode_putfh(xdr);
5666 if (status)
5667 goto out;
5668 status = decode_read(xdr, rqstp, res);
5669 if (!status)
5670 status = res->count;
5671 out:
5672 return status;
5673 }
5674
5675 /*
5676 * Decode WRITE response
5677 */
5678 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5679 struct nfs_writeres *res)
5680 {
5681 struct compound_hdr hdr;
5682 int status;
5683
5684 status = decode_compound_hdr(xdr, &hdr);
5685 if (status)
5686 goto out;
5687 status = decode_sequence(xdr, &res->seq_res, rqstp);
5688 if (status)
5689 goto out;
5690 status = decode_putfh(xdr);
5691 if (status)
5692 goto out;
5693 status = decode_write(xdr, res);
5694 if (status)
5695 goto out;
5696 if (res->fattr)
5697 decode_getfattr(xdr, res->fattr, res->server,
5698 !RPC_IS_ASYNC(rqstp->rq_task));
5699 if (!status)
5700 status = res->count;
5701 out:
5702 return status;
5703 }
5704
5705 /*
5706 * Decode COMMIT response
5707 */
5708 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5709 struct nfs_writeres *res)
5710 {
5711 struct compound_hdr hdr;
5712 int status;
5713
5714 status = decode_compound_hdr(xdr, &hdr);
5715 if (status)
5716 goto out;
5717 status = decode_sequence(xdr, &res->seq_res, rqstp);
5718 if (status)
5719 goto out;
5720 status = decode_putfh(xdr);
5721 if (status)
5722 goto out;
5723 status = decode_commit(xdr, res);
5724 if (status)
5725 goto out;
5726 decode_getfattr(xdr, res->fattr, res->server,
5727 !RPC_IS_ASYNC(rqstp->rq_task));
5728 out:
5729 return status;
5730 }
5731
5732 /*
5733 * Decode FSINFO response
5734 */
5735 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5736 struct nfs4_fsinfo_res *res)
5737 {
5738 struct compound_hdr hdr;
5739 int status;
5740
5741 status = decode_compound_hdr(xdr, &hdr);
5742 if (!status)
5743 status = decode_sequence(xdr, &res->seq_res, req);
5744 if (!status)
5745 status = decode_putfh(xdr);
5746 if (!status)
5747 status = decode_fsinfo(xdr, res->fsinfo);
5748 return status;
5749 }
5750
5751 /*
5752 * Decode PATHCONF response
5753 */
5754 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5755 struct nfs4_pathconf_res *res)
5756 {
5757 struct compound_hdr hdr;
5758 int status;
5759
5760 status = decode_compound_hdr(xdr, &hdr);
5761 if (!status)
5762 status = decode_sequence(xdr, &res->seq_res, req);
5763 if (!status)
5764 status = decode_putfh(xdr);
5765 if (!status)
5766 status = decode_pathconf(xdr, res->pathconf);
5767 return status;
5768 }
5769
5770 /*
5771 * Decode STATFS response
5772 */
5773 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5774 struct nfs4_statfs_res *res)
5775 {
5776 struct compound_hdr hdr;
5777 int status;
5778
5779 status = decode_compound_hdr(xdr, &hdr);
5780 if (!status)
5781 status = decode_sequence(xdr, &res->seq_res, req);
5782 if (!status)
5783 status = decode_putfh(xdr);
5784 if (!status)
5785 status = decode_statfs(xdr, res->fsstat);
5786 return status;
5787 }
5788
5789 /*
5790 * Decode GETATTR_BITMAP response
5791 */
5792 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5793 struct xdr_stream *xdr,
5794 struct nfs4_server_caps_res *res)
5795 {
5796 struct compound_hdr hdr;
5797 int status;
5798
5799 status = decode_compound_hdr(xdr, &hdr);
5800 if (status)
5801 goto out;
5802 status = decode_sequence(xdr, &res->seq_res, req);
5803 if (status)
5804 goto out;
5805 status = decode_putfh(xdr);
5806 if (status)
5807 goto out;
5808 status = decode_server_caps(xdr, res);
5809 out:
5810 return status;
5811 }
5812
5813 /*
5814 * Decode RENEW response
5815 */
5816 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5817 void *__unused)
5818 {
5819 struct compound_hdr hdr;
5820 int status;
5821
5822 status = decode_compound_hdr(xdr, &hdr);
5823 if (!status)
5824 status = decode_renew(xdr);
5825 return status;
5826 }
5827
5828 /*
5829 * Decode SETCLIENTID response
5830 */
5831 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5832 struct xdr_stream *xdr,
5833 struct nfs4_setclientid_res *res)
5834 {
5835 struct compound_hdr hdr;
5836 int status;
5837
5838 status = decode_compound_hdr(xdr, &hdr);
5839 if (!status)
5840 status = decode_setclientid(xdr, res);
5841 return status;
5842 }
5843
5844 /*
5845 * Decode SETCLIENTID_CONFIRM response
5846 */
5847 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5848 struct xdr_stream *xdr,
5849 struct nfs_fsinfo *fsinfo)
5850 {
5851 struct compound_hdr hdr;
5852 int status;
5853
5854 status = decode_compound_hdr(xdr, &hdr);
5855 if (!status)
5856 status = decode_setclientid_confirm(xdr);
5857 if (!status)
5858 status = decode_putrootfh(xdr);
5859 if (!status)
5860 status = decode_fsinfo(xdr, fsinfo);
5861 return status;
5862 }
5863
5864 /*
5865 * Decode DELEGRETURN response
5866 */
5867 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5868 struct xdr_stream *xdr,
5869 struct nfs4_delegreturnres *res)
5870 {
5871 struct compound_hdr hdr;
5872 int status;
5873
5874 status = decode_compound_hdr(xdr, &hdr);
5875 if (status)
5876 goto out;
5877 status = decode_sequence(xdr, &res->seq_res, rqstp);
5878 if (status)
5879 goto out;
5880 status = decode_putfh(xdr);
5881 if (status != 0)
5882 goto out;
5883 status = decode_delegreturn(xdr);
5884 if (status != 0)
5885 goto out;
5886 decode_getfattr(xdr, res->fattr, res->server,
5887 !RPC_IS_ASYNC(rqstp->rq_task));
5888 out:
5889 return status;
5890 }
5891
5892 /*
5893 * Decode FS_LOCATIONS response
5894 */
5895 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
5896 struct xdr_stream *xdr,
5897 struct nfs4_fs_locations_res *res)
5898 {
5899 struct compound_hdr hdr;
5900 int status;
5901
5902 status = decode_compound_hdr(xdr, &hdr);
5903 if (status)
5904 goto out;
5905 status = decode_sequence(xdr, &res->seq_res, req);
5906 if (status)
5907 goto out;
5908 status = decode_putfh(xdr);
5909 if (status)
5910 goto out;
5911 status = decode_lookup(xdr);
5912 if (status)
5913 goto out;
5914 xdr_enter_page(xdr, PAGE_SIZE);
5915 status = decode_getfattr(xdr, &res->fs_locations->fattr,
5916 res->fs_locations->server,
5917 !RPC_IS_ASYNC(req->rq_task));
5918 out:
5919 return status;
5920 }
5921
5922 #if defined(CONFIG_NFS_V4_1)
5923 /*
5924 * Decode EXCHANGE_ID response
5925 */
5926 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
5927 struct xdr_stream *xdr,
5928 void *res)
5929 {
5930 struct compound_hdr hdr;
5931 int status;
5932
5933 status = decode_compound_hdr(xdr, &hdr);
5934 if (!status)
5935 status = decode_exchange_id(xdr, res);
5936 return status;
5937 }
5938
5939 /*
5940 * Decode CREATE_SESSION response
5941 */
5942 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
5943 struct xdr_stream *xdr,
5944 struct nfs41_create_session_res *res)
5945 {
5946 struct compound_hdr hdr;
5947 int status;
5948
5949 status = decode_compound_hdr(xdr, &hdr);
5950 if (!status)
5951 status = decode_create_session(xdr, res);
5952 return status;
5953 }
5954
5955 /*
5956 * Decode DESTROY_SESSION response
5957 */
5958 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
5959 struct xdr_stream *xdr,
5960 void *res)
5961 {
5962 struct compound_hdr hdr;
5963 int status;
5964
5965 status = decode_compound_hdr(xdr, &hdr);
5966 if (!status)
5967 status = decode_destroy_session(xdr, res);
5968 return status;
5969 }
5970
5971 /*
5972 * Decode SEQUENCE response
5973 */
5974 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
5975 struct xdr_stream *xdr,
5976 struct nfs4_sequence_res *res)
5977 {
5978 struct compound_hdr hdr;
5979 int status;
5980
5981 status = decode_compound_hdr(xdr, &hdr);
5982 if (!status)
5983 status = decode_sequence(xdr, res, rqstp);
5984 return status;
5985 }
5986
5987 /*
5988 * Decode GET_LEASE_TIME response
5989 */
5990 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
5991 struct xdr_stream *xdr,
5992 struct nfs4_get_lease_time_res *res)
5993 {
5994 struct compound_hdr hdr;
5995 int status;
5996
5997 status = decode_compound_hdr(xdr, &hdr);
5998 if (!status)
5999 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6000 if (!status)
6001 status = decode_putrootfh(xdr);
6002 if (!status)
6003 status = decode_fsinfo(xdr, res->lr_fsinfo);
6004 return status;
6005 }
6006
6007 /*
6008 * Decode RECLAIM_COMPLETE response
6009 */
6010 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6011 struct xdr_stream *xdr,
6012 struct nfs41_reclaim_complete_res *res)
6013 {
6014 struct compound_hdr hdr;
6015 int status;
6016
6017 status = decode_compound_hdr(xdr, &hdr);
6018 if (!status)
6019 status = decode_sequence(xdr, &res->seq_res, rqstp);
6020 if (!status)
6021 status = decode_reclaim_complete(xdr, (void *)NULL);
6022 return status;
6023 }
6024
6025 /*
6026 * Decode GETDEVINFO response
6027 */
6028 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6029 struct xdr_stream *xdr,
6030 struct nfs4_getdeviceinfo_res *res)
6031 {
6032 struct compound_hdr hdr;
6033 int status;
6034
6035 status = decode_compound_hdr(xdr, &hdr);
6036 if (status != 0)
6037 goto out;
6038 status = decode_sequence(xdr, &res->seq_res, rqstp);
6039 if (status != 0)
6040 goto out;
6041 status = decode_getdeviceinfo(xdr, res->pdev);
6042 out:
6043 return status;
6044 }
6045
6046 /*
6047 * Decode LAYOUTGET response
6048 */
6049 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6050 struct xdr_stream *xdr,
6051 struct nfs4_layoutget_res *res)
6052 {
6053 struct compound_hdr hdr;
6054 int status;
6055
6056 status = decode_compound_hdr(xdr, &hdr);
6057 if (status)
6058 goto out;
6059 status = decode_sequence(xdr, &res->seq_res, rqstp);
6060 if (status)
6061 goto out;
6062 status = decode_putfh(xdr);
6063 if (status)
6064 goto out;
6065 status = decode_layoutget(xdr, rqstp, res);
6066 out:
6067 return status;
6068 }
6069 #endif /* CONFIG_NFS_V4_1 */
6070
6071 /**
6072 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6073 * the local page cache.
6074 * @xdr: XDR stream where entry resides
6075 * @entry: buffer to fill in with entry data
6076 * @plus: boolean indicating whether this should be a readdirplus entry
6077 *
6078 * Returns zero if successful, otherwise a negative errno value is
6079 * returned.
6080 *
6081 * This function is not invoked during READDIR reply decoding, but
6082 * rather whenever an application invokes the getdents(2) system call
6083 * on a directory already in our cache.
6084 */
6085 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6086 int plus)
6087 {
6088 uint32_t bitmap[2] = {0};
6089 uint32_t len;
6090 __be32 *p = xdr_inline_decode(xdr, 4);
6091 if (unlikely(!p))
6092 goto out_overflow;
6093 if (*p == xdr_zero) {
6094 p = xdr_inline_decode(xdr, 4);
6095 if (unlikely(!p))
6096 goto out_overflow;
6097 if (*p == xdr_zero)
6098 return -EAGAIN;
6099 entry->eof = 1;
6100 return -EBADCOOKIE;
6101 }
6102
6103 p = xdr_inline_decode(xdr, 12);
6104 if (unlikely(!p))
6105 goto out_overflow;
6106 entry->prev_cookie = entry->cookie;
6107 p = xdr_decode_hyper(p, &entry->cookie);
6108 entry->len = be32_to_cpup(p);
6109
6110 p = xdr_inline_decode(xdr, entry->len);
6111 if (unlikely(!p))
6112 goto out_overflow;
6113 entry->name = (const char *) p;
6114
6115 /*
6116 * In case the server doesn't return an inode number,
6117 * we fake one here. (We don't use inode number 0,
6118 * since glibc seems to choke on it...)
6119 */
6120 entry->ino = 1;
6121 entry->fattr->valid = 0;
6122
6123 if (decode_attr_bitmap(xdr, bitmap) < 0)
6124 goto out_overflow;
6125
6126 if (decode_attr_length(xdr, &len, &p) < 0)
6127 goto out_overflow;
6128
6129 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6130 entry->server, 1) < 0)
6131 goto out_overflow;
6132 if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6133 entry->ino = entry->fattr->fileid;
6134
6135 entry->d_type = DT_UNKNOWN;
6136 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6137 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6138
6139 return 0;
6140
6141 out_overflow:
6142 print_overflow_msg(__func__, xdr);
6143 return -EAGAIN;
6144 }
6145
6146 /*
6147 * We need to translate between nfs status return values and
6148 * the local errno values which may not be the same.
6149 */
6150 static struct {
6151 int stat;
6152 int errno;
6153 } nfs_errtbl[] = {
6154 { NFS4_OK, 0 },
6155 { NFS4ERR_PERM, -EPERM },
6156 { NFS4ERR_NOENT, -ENOENT },
6157 { NFS4ERR_IO, -errno_NFSERR_IO},
6158 { NFS4ERR_NXIO, -ENXIO },
6159 { NFS4ERR_ACCESS, -EACCES },
6160 { NFS4ERR_EXIST, -EEXIST },
6161 { NFS4ERR_XDEV, -EXDEV },
6162 { NFS4ERR_NOTDIR, -ENOTDIR },
6163 { NFS4ERR_ISDIR, -EISDIR },
6164 { NFS4ERR_INVAL, -EINVAL },
6165 { NFS4ERR_FBIG, -EFBIG },
6166 { NFS4ERR_NOSPC, -ENOSPC },
6167 { NFS4ERR_ROFS, -EROFS },
6168 { NFS4ERR_MLINK, -EMLINK },
6169 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
6170 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
6171 { NFS4ERR_DQUOT, -EDQUOT },
6172 { NFS4ERR_STALE, -ESTALE },
6173 { NFS4ERR_BADHANDLE, -EBADHANDLE },
6174 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
6175 { NFS4ERR_NOTSUPP, -ENOTSUPP },
6176 { NFS4ERR_TOOSMALL, -ETOOSMALL },
6177 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
6178 { NFS4ERR_BADTYPE, -EBADTYPE },
6179 { NFS4ERR_LOCKED, -EAGAIN },
6180 { NFS4ERR_SYMLINK, -ELOOP },
6181 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
6182 { NFS4ERR_DEADLOCK, -EDEADLK },
6183 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
6184 * to be handled by a
6185 * middle-layer.
6186 */
6187 { -1, -EIO }
6188 };
6189
6190 /*
6191 * Convert an NFS error code to a local one.
6192 * This one is used jointly by NFSv2 and NFSv3.
6193 */
6194 static int
6195 nfs4_stat_to_errno(int stat)
6196 {
6197 int i;
6198 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6199 if (nfs_errtbl[i].stat == stat)
6200 return nfs_errtbl[i].errno;
6201 }
6202 if (stat <= 10000 || stat > 10100) {
6203 /* The server is looney tunes. */
6204 return -EREMOTEIO;
6205 }
6206 /* If we cannot translate the error, the recovery routines should
6207 * handle it.
6208 * Note: remaining NFSv4 error codes have values > 10000, so should
6209 * not conflict with native Linux error codes.
6210 */
6211 return -stat;
6212 }
6213
6214 #define PROC(proc, argtype, restype) \
6215 [NFSPROC4_CLNT_##proc] = { \
6216 .p_proc = NFSPROC4_COMPOUND, \
6217 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
6218 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
6219 .p_arglen = NFS4_##argtype##_sz, \
6220 .p_replen = NFS4_##restype##_sz, \
6221 .p_statidx = NFSPROC4_CLNT_##proc, \
6222 .p_name = #proc, \
6223 }
6224
6225 struct rpc_procinfo nfs4_procedures[] = {
6226 PROC(READ, enc_read, dec_read),
6227 PROC(WRITE, enc_write, dec_write),
6228 PROC(COMMIT, enc_commit, dec_commit),
6229 PROC(OPEN, enc_open, dec_open),
6230 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
6231 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
6232 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
6233 PROC(CLOSE, enc_close, dec_close),
6234 PROC(SETATTR, enc_setattr, dec_setattr),
6235 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
6236 PROC(RENEW, enc_renew, dec_renew),
6237 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
6238 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6239 PROC(LOCK, enc_lock, dec_lock),
6240 PROC(LOCKT, enc_lockt, dec_lockt),
6241 PROC(LOCKU, enc_locku, dec_locku),
6242 PROC(ACCESS, enc_access, dec_access),
6243 PROC(GETATTR, enc_getattr, dec_getattr),
6244 PROC(LOOKUP, enc_lookup, dec_lookup),
6245 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
6246 PROC(REMOVE, enc_remove, dec_remove),
6247 PROC(RENAME, enc_rename, dec_rename),
6248 PROC(LINK, enc_link, dec_link),
6249 PROC(SYMLINK, enc_symlink, dec_symlink),
6250 PROC(CREATE, enc_create, dec_create),
6251 PROC(PATHCONF, enc_pathconf, dec_pathconf),
6252 PROC(STATFS, enc_statfs, dec_statfs),
6253 PROC(READLINK, enc_readlink, dec_readlink),
6254 PROC(READDIR, enc_readdir, dec_readdir),
6255 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
6256 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
6257 PROC(GETACL, enc_getacl, dec_getacl),
6258 PROC(SETACL, enc_setacl, dec_setacl),
6259 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
6260 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
6261 #if defined(CONFIG_NFS_V4_1)
6262 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
6263 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
6264 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
6265 PROC(SEQUENCE, enc_sequence, dec_sequence),
6266 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
6267 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
6268 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
6269 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
6270 #endif /* CONFIG_NFS_V4_1 */
6271 };
6272
6273 struct rpc_version nfs_version4 = {
6274 .number = 4,
6275 .nrprocs = ARRAY_SIZE(nfs4_procedures),
6276 .procs = nfs4_procedures
6277 };
6278
6279 /*
6280 * Local variables:
6281 * c-basic-offset: 8
6282 * End:
6283 */
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