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xen: cleancache shim to Xen Transcendent Memory
[linux-2.6/next.git] / fs / nfs / nfs4xdr.c
blobdddfb5795d7b8c67999ebfc819b5cd8021e36cd8
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/sunrpc/gss_api.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55 #include "internal.h"
56 #include "pnfs.h"
57
58 #define NFSDBG_FACILITY NFSDBG_XDR
59
60 /* Mapping from NFS error code to "errno" error code. */
61 #define errno_NFSERR_IO EIO
62
63 static int nfs4_stat_to_errno(int);
64
65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
66 #ifdef DEBUG
67 #define NFS4_MAXTAGLEN 20
68 #else
69 #define NFS4_MAXTAGLEN 0
70 #endif
71
72 /* lock,open owner id:
73 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
74 */
75 #define open_owner_id_maxsz (1 + 1 + 4)
76 #define lock_owner_id_maxsz (1 + 1 + 4)
77 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
78 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
79 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
80 #define op_encode_hdr_maxsz (1)
81 #define op_decode_hdr_maxsz (2)
82 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
84 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
86 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
87 (NFS4_FHSIZE >> 2))
88 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
91 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
92 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
93 ((3+NFS4_FHSIZE) >> 2))
94 #define nfs4_fattr_bitmap_maxsz 3
95 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
96 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
97 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
98 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
100 /* This is based on getfattr, which uses the most attributes: */
101 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
102 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
103 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
104 nfs4_fattr_value_maxsz)
105 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
106 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
107 1 + 2 + 1 + \
108 nfs4_owner_maxsz + \
109 nfs4_group_maxsz + \
110 4 + 4)
111 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
114 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
115 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
116 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 15)
117 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
118 #define decode_renew_maxsz (op_decode_hdr_maxsz)
119 #define encode_setclientid_maxsz \
120 (op_encode_hdr_maxsz + \
121 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
122 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
123 1 /* sc_prog */ + \
124 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
125 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
126 1) /* sc_cb_ident */
127 #define decode_setclientid_maxsz \
128 (op_decode_hdr_maxsz + \
129 2 + \
130 1024) /* large value for CLID_INUSE */
131 #define encode_setclientid_confirm_maxsz \
132 (op_encode_hdr_maxsz + \
133 3 + (NFS4_VERIFIER_SIZE >> 2))
134 #define decode_setclientid_confirm_maxsz \
135 (op_decode_hdr_maxsz)
136 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
137 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
138 #define encode_share_access_maxsz \
139 (2)
140 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
141 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
142 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
143 #define encode_open_maxsz (op_encode_hdr_maxsz + \
144 2 + encode_share_access_maxsz + 2 + \
145 open_owner_id_maxsz + \
146 encode_opentype_maxsz + \
147 encode_claim_null_maxsz)
148 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
149 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
150 decode_ace_maxsz)
151 #define decode_change_info_maxsz (5)
152 #define decode_open_maxsz (op_decode_hdr_maxsz + \
153 decode_stateid_maxsz + \
154 decode_change_info_maxsz + 1 + \
155 nfs4_fattr_bitmap_maxsz + \
156 decode_delegation_maxsz)
157 #define encode_open_confirm_maxsz \
158 (op_encode_hdr_maxsz + \
159 encode_stateid_maxsz + 1)
160 #define decode_open_confirm_maxsz \
161 (op_decode_hdr_maxsz + \
162 decode_stateid_maxsz)
163 #define encode_open_downgrade_maxsz \
164 (op_encode_hdr_maxsz + \
165 encode_stateid_maxsz + 1 + \
166 encode_share_access_maxsz)
167 #define decode_open_downgrade_maxsz \
168 (op_decode_hdr_maxsz + \
169 decode_stateid_maxsz)
170 #define encode_close_maxsz (op_encode_hdr_maxsz + \
171 1 + encode_stateid_maxsz)
172 #define decode_close_maxsz (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz)
174 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
175 encode_stateid_maxsz + \
176 encode_attrs_maxsz)
177 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
178 nfs4_fattr_bitmap_maxsz)
179 #define encode_read_maxsz (op_encode_hdr_maxsz + \
180 encode_stateid_maxsz + 3)
181 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
182 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
183 2 + encode_verifier_maxsz + 5)
184 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
185 decode_verifier_maxsz)
186 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
187 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
188 #define encode_write_maxsz (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 4)
190 #define decode_write_maxsz (op_decode_hdr_maxsz + \
191 2 + decode_verifier_maxsz)
192 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
193 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
194 decode_verifier_maxsz)
195 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
196 nfs4_name_maxsz)
197 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
198 decode_change_info_maxsz)
199 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
200 2 * nfs4_name_maxsz)
201 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
202 decode_change_info_maxsz + \
203 decode_change_info_maxsz)
204 #define encode_link_maxsz (op_encode_hdr_maxsz + \
205 nfs4_name_maxsz)
206 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
207 #define encode_lockowner_maxsz (7)
208 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
209 7 + \
210 1 + encode_stateid_maxsz + 1 + \
211 encode_lockowner_maxsz)
212 #define decode_lock_denied_maxsz \
213 (8 + decode_lockowner_maxsz)
214 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
215 decode_lock_denied_maxsz)
216 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
217 encode_lockowner_maxsz)
218 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
219 decode_lock_denied_maxsz)
220 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
221 encode_stateid_maxsz + \
222 4)
223 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
224 decode_stateid_maxsz)
225 #define encode_release_lockowner_maxsz \
226 (op_encode_hdr_maxsz + \
227 encode_lockowner_maxsz)
228 #define decode_release_lockowner_maxsz \
229 (op_decode_hdr_maxsz)
230 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
231 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
232 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
233 1 + nfs4_name_maxsz + \
234 1 + \
235 nfs4_fattr_maxsz)
236 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
237 #define encode_create_maxsz (op_encode_hdr_maxsz + \
238 1 + 2 + nfs4_name_maxsz + \
239 encode_attrs_maxsz)
240 #define decode_create_maxsz (op_decode_hdr_maxsz + \
241 decode_change_info_maxsz + \
242 nfs4_fattr_bitmap_maxsz)
243 #define encode_statfs_maxsz (encode_getattr_maxsz)
244 #define decode_statfs_maxsz (decode_getattr_maxsz)
245 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
246 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
247 #define encode_getacl_maxsz (encode_getattr_maxsz)
248 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
249 nfs4_fattr_bitmap_maxsz + 1)
250 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
251 encode_stateid_maxsz + 3)
252 #define decode_setacl_maxsz (decode_setattr_maxsz)
253 #define encode_fs_locations_maxsz \
254 (encode_getattr_maxsz)
255 #define decode_fs_locations_maxsz \
256 (0)
257 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
258 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))
259
260 #if defined(CONFIG_NFS_V4_1)
261 #define NFS4_MAX_MACHINE_NAME_LEN (64)
262
263 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
264 encode_verifier_maxsz + \
265 1 /* co_ownerid.len */ + \
266 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
267 1 /* flags */ + \
268 1 /* spa_how */ + \
269 0 /* SP4_NONE (for now) */ + \
270 1 /* zero implemetation id array */)
271 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
272 2 /* eir_clientid */ + \
273 1 /* eir_sequenceid */ + \
274 1 /* eir_flags */ + \
275 1 /* spr_how */ + \
276 0 /* SP4_NONE (for now) */ + \
277 2 /* eir_server_owner.so_minor_id */ + \
278 /* eir_server_owner.so_major_id<> */ \
279 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
280 /* eir_server_scope<> */ \
281 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
282 1 /* eir_server_impl_id array length */ + \
283 0 /* ignored eir_server_impl_id contents */)
284 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
285 #define decode_channel_attrs_maxsz (6 + \
286 1 /* ca_rdma_ird.len */ + \
287 1 /* ca_rdma_ird */)
288 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
289 2 /* csa_clientid */ + \
290 1 /* csa_sequence */ + \
291 1 /* csa_flags */ + \
292 encode_channel_attrs_maxsz + \
293 encode_channel_attrs_maxsz + \
294 1 /* csa_cb_program */ + \
295 1 /* csa_sec_parms.len (1) */ + \
296 1 /* cb_secflavor (AUTH_SYS) */ + \
297 1 /* stamp */ + \
298 1 /* machinename.len */ + \
299 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
300 1 /* uid */ + \
301 1 /* gid */ + \
302 1 /* gids.len (0) */)
303 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
304 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
305 1 /* csr_sequence */ + \
306 1 /* csr_flags */ + \
307 decode_channel_attrs_maxsz + \
308 decode_channel_attrs_maxsz)
309 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
310 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
311 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
312 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
313 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
314 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
315 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
316 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
317 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
318 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
319 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
320 1 /* layout type */ + \
321 1 /* opaque devaddr4 length */ + \
322 /* devaddr4 payload is read into page */ \
323 1 /* notification bitmap length */ + \
324 1 /* notification bitmap */)
325 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
326 encode_stateid_maxsz)
327 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
328 decode_stateid_maxsz + \
329 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
330 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
331 2 /* offset */ + \
332 2 /* length */ + \
333 1 /* reclaim */ + \
334 encode_stateid_maxsz + \
335 1 /* new offset (true) */ + \
336 2 /* last byte written */ + \
337 1 /* nt_timechanged (false) */ + \
338 1 /* layoutupdate4 layout type */ + \
339 1 /* NULL filelayout layoutupdate4 payload */)
340 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
341
342 #else /* CONFIG_NFS_V4_1 */
343 #define encode_sequence_maxsz 0
344 #define decode_sequence_maxsz 0
345 #endif /* CONFIG_NFS_V4_1 */
346
347 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
348 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
349 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
350 encode_sequence_maxsz + \
351 encode_putfh_maxsz + \
352 encode_read_maxsz)
353 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
354 decode_sequence_maxsz + \
355 decode_putfh_maxsz + \
356 decode_read_maxsz)
357 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
358 encode_sequence_maxsz + \
359 encode_putfh_maxsz + \
360 encode_readlink_maxsz)
361 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
362 decode_sequence_maxsz + \
363 decode_putfh_maxsz + \
364 decode_readlink_maxsz)
365 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
366 encode_sequence_maxsz + \
367 encode_putfh_maxsz + \
368 encode_readdir_maxsz)
369 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
370 decode_sequence_maxsz + \
371 decode_putfh_maxsz + \
372 decode_readdir_maxsz)
373 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
374 encode_sequence_maxsz + \
375 encode_putfh_maxsz + \
376 encode_write_maxsz + \
377 encode_getattr_maxsz)
378 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
379 decode_sequence_maxsz + \
380 decode_putfh_maxsz + \
381 decode_write_maxsz + \
382 decode_getattr_maxsz)
383 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
384 encode_sequence_maxsz + \
385 encode_putfh_maxsz + \
386 encode_commit_maxsz + \
387 encode_getattr_maxsz)
388 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
389 decode_sequence_maxsz + \
390 decode_putfh_maxsz + \
391 decode_commit_maxsz + \
392 decode_getattr_maxsz)
393 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
394 encode_sequence_maxsz + \
395 encode_putfh_maxsz + \
396 encode_savefh_maxsz + \
397 encode_open_maxsz + \
398 encode_getfh_maxsz + \
399 encode_getattr_maxsz + \
400 encode_restorefh_maxsz + \
401 encode_getattr_maxsz)
402 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
403 decode_sequence_maxsz + \
404 decode_putfh_maxsz + \
405 decode_savefh_maxsz + \
406 decode_open_maxsz + \
407 decode_getfh_maxsz + \
408 decode_getattr_maxsz + \
409 decode_restorefh_maxsz + \
410 decode_getattr_maxsz)
411 #define NFS4_enc_open_confirm_sz \
412 (compound_encode_hdr_maxsz + \
413 encode_putfh_maxsz + \
414 encode_open_confirm_maxsz)
415 #define NFS4_dec_open_confirm_sz \
416 (compound_decode_hdr_maxsz + \
417 decode_putfh_maxsz + \
418 decode_open_confirm_maxsz)
419 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
420 encode_sequence_maxsz + \
421 encode_putfh_maxsz + \
422 encode_open_maxsz + \
423 encode_getattr_maxsz)
424 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
425 decode_sequence_maxsz + \
426 decode_putfh_maxsz + \
427 decode_open_maxsz + \
428 decode_getattr_maxsz)
429 #define NFS4_enc_open_downgrade_sz \
430 (compound_encode_hdr_maxsz + \
431 encode_sequence_maxsz + \
432 encode_putfh_maxsz + \
433 encode_open_downgrade_maxsz + \
434 encode_getattr_maxsz)
435 #define NFS4_dec_open_downgrade_sz \
436 (compound_decode_hdr_maxsz + \
437 decode_sequence_maxsz + \
438 decode_putfh_maxsz + \
439 decode_open_downgrade_maxsz + \
440 decode_getattr_maxsz)
441 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_close_maxsz + \
445 encode_getattr_maxsz)
446 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
447 decode_sequence_maxsz + \
448 decode_putfh_maxsz + \
449 decode_close_maxsz + \
450 decode_getattr_maxsz)
451 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
452 encode_sequence_maxsz + \
453 encode_putfh_maxsz + \
454 encode_setattr_maxsz + \
455 encode_getattr_maxsz)
456 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
457 decode_sequence_maxsz + \
458 decode_putfh_maxsz + \
459 decode_setattr_maxsz + \
460 decode_getattr_maxsz)
461 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
462 encode_sequence_maxsz + \
463 encode_putfh_maxsz + \
464 encode_fsinfo_maxsz)
465 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
466 decode_sequence_maxsz + \
467 decode_putfh_maxsz + \
468 decode_fsinfo_maxsz)
469 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
470 encode_renew_maxsz)
471 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
472 decode_renew_maxsz)
473 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
474 encode_setclientid_maxsz)
475 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
476 decode_setclientid_maxsz)
477 #define NFS4_enc_setclientid_confirm_sz \
478 (compound_encode_hdr_maxsz + \
479 encode_setclientid_confirm_maxsz + \
480 encode_putrootfh_maxsz + \
481 encode_fsinfo_maxsz)
482 #define NFS4_dec_setclientid_confirm_sz \
483 (compound_decode_hdr_maxsz + \
484 decode_setclientid_confirm_maxsz + \
485 decode_putrootfh_maxsz + \
486 decode_fsinfo_maxsz)
487 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
488 encode_sequence_maxsz + \
489 encode_putfh_maxsz + \
490 encode_lock_maxsz)
491 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_lock_maxsz)
495 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
496 encode_sequence_maxsz + \
497 encode_putfh_maxsz + \
498 encode_lockt_maxsz)
499 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
500 decode_sequence_maxsz + \
501 decode_putfh_maxsz + \
502 decode_lockt_maxsz)
503 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
504 encode_sequence_maxsz + \
505 encode_putfh_maxsz + \
506 encode_locku_maxsz)
507 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
508 decode_sequence_maxsz + \
509 decode_putfh_maxsz + \
510 decode_locku_maxsz)
511 #define NFS4_enc_release_lockowner_sz \
512 (compound_encode_hdr_maxsz + \
513 encode_lockowner_maxsz)
514 #define NFS4_dec_release_lockowner_sz \
515 (compound_decode_hdr_maxsz + \
516 decode_lockowner_maxsz)
517 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_access_maxsz + \
521 encode_getattr_maxsz)
522 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
523 decode_sequence_maxsz + \
524 decode_putfh_maxsz + \
525 decode_access_maxsz + \
526 decode_getattr_maxsz)
527 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_getattr_maxsz)
531 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
532 decode_sequence_maxsz + \
533 decode_putfh_maxsz + \
534 decode_getattr_maxsz)
535 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
536 encode_sequence_maxsz + \
537 encode_putfh_maxsz + \
538 encode_lookup_maxsz + \
539 encode_getattr_maxsz + \
540 encode_getfh_maxsz)
541 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
542 decode_sequence_maxsz + \
543 decode_putfh_maxsz + \
544 decode_lookup_maxsz + \
545 decode_getattr_maxsz + \
546 decode_getfh_maxsz)
547 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
548 encode_sequence_maxsz + \
549 encode_putrootfh_maxsz + \
550 encode_getattr_maxsz + \
551 encode_getfh_maxsz)
552 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
553 decode_sequence_maxsz + \
554 decode_putrootfh_maxsz + \
555 decode_getattr_maxsz + \
556 decode_getfh_maxsz)
557 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_remove_maxsz + \
561 encode_getattr_maxsz)
562 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
563 decode_sequence_maxsz + \
564 decode_putfh_maxsz + \
565 decode_remove_maxsz + \
566 decode_getattr_maxsz)
567 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
568 encode_sequence_maxsz + \
569 encode_putfh_maxsz + \
570 encode_savefh_maxsz + \
571 encode_putfh_maxsz + \
572 encode_rename_maxsz + \
573 encode_getattr_maxsz + \
574 encode_restorefh_maxsz + \
575 encode_getattr_maxsz)
576 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
577 decode_sequence_maxsz + \
578 decode_putfh_maxsz + \
579 decode_savefh_maxsz + \
580 decode_putfh_maxsz + \
581 decode_rename_maxsz + \
582 decode_getattr_maxsz + \
583 decode_restorefh_maxsz + \
584 decode_getattr_maxsz)
585 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putfh_maxsz + \
588 encode_savefh_maxsz + \
589 encode_putfh_maxsz + \
590 encode_link_maxsz + \
591 decode_getattr_maxsz + \
592 encode_restorefh_maxsz + \
593 decode_getattr_maxsz)
594 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_savefh_maxsz + \
598 decode_putfh_maxsz + \
599 decode_link_maxsz + \
600 decode_getattr_maxsz + \
601 decode_restorefh_maxsz + \
602 decode_getattr_maxsz)
603 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
604 encode_sequence_maxsz + \
605 encode_putfh_maxsz + \
606 encode_symlink_maxsz + \
607 encode_getattr_maxsz + \
608 encode_getfh_maxsz)
609 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
610 decode_sequence_maxsz + \
611 decode_putfh_maxsz + \
612 decode_symlink_maxsz + \
613 decode_getattr_maxsz + \
614 decode_getfh_maxsz)
615 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
616 encode_sequence_maxsz + \
617 encode_putfh_maxsz + \
618 encode_savefh_maxsz + \
619 encode_create_maxsz + \
620 encode_getfh_maxsz + \
621 encode_getattr_maxsz + \
622 encode_restorefh_maxsz + \
623 encode_getattr_maxsz)
624 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
625 decode_sequence_maxsz + \
626 decode_putfh_maxsz + \
627 decode_savefh_maxsz + \
628 decode_create_maxsz + \
629 decode_getfh_maxsz + \
630 decode_getattr_maxsz + \
631 decode_restorefh_maxsz + \
632 decode_getattr_maxsz)
633 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
634 encode_sequence_maxsz + \
635 encode_putfh_maxsz + \
636 encode_getattr_maxsz)
637 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
638 decode_sequence_maxsz + \
639 decode_putfh_maxsz + \
640 decode_getattr_maxsz)
641 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
642 encode_sequence_maxsz + \
643 encode_putfh_maxsz + \
644 encode_statfs_maxsz)
645 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
646 decode_sequence_maxsz + \
647 decode_putfh_maxsz + \
648 decode_statfs_maxsz)
649 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
650 encode_sequence_maxsz + \
651 encode_putfh_maxsz + \
652 encode_getattr_maxsz)
653 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
654 decode_sequence_maxsz + \
655 decode_putfh_maxsz + \
656 decode_getattr_maxsz)
657 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
658 encode_sequence_maxsz + \
659 encode_putfh_maxsz + \
660 encode_delegreturn_maxsz + \
661 encode_getattr_maxsz)
662 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
663 decode_sequence_maxsz + \
664 decode_delegreturn_maxsz + \
665 decode_getattr_maxsz)
666 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
667 encode_sequence_maxsz + \
668 encode_putfh_maxsz + \
669 encode_getacl_maxsz)
670 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
671 decode_sequence_maxsz + \
672 decode_putfh_maxsz + \
673 decode_getacl_maxsz)
674 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
675 encode_sequence_maxsz + \
676 encode_putfh_maxsz + \
677 encode_setacl_maxsz)
678 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
679 decode_sequence_maxsz + \
680 decode_putfh_maxsz + \
681 decode_setacl_maxsz)
682 #define NFS4_enc_fs_locations_sz \
683 (compound_encode_hdr_maxsz + \
684 encode_sequence_maxsz + \
685 encode_putfh_maxsz + \
686 encode_lookup_maxsz + \
687 encode_fs_locations_maxsz)
688 #define NFS4_dec_fs_locations_sz \
689 (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_lookup_maxsz + \
693 decode_fs_locations_maxsz)
694 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
695 encode_sequence_maxsz + \
696 encode_putfh_maxsz + \
697 encode_secinfo_maxsz)
698 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
699 decode_sequence_maxsz + \
700 decode_putfh_maxsz + \
701 decode_secinfo_maxsz)
702 #if defined(CONFIG_NFS_V4_1)
703 #define NFS4_enc_exchange_id_sz \
704 (compound_encode_hdr_maxsz + \
705 encode_exchange_id_maxsz)
706 #define NFS4_dec_exchange_id_sz \
707 (compound_decode_hdr_maxsz + \
708 decode_exchange_id_maxsz)
709 #define NFS4_enc_create_session_sz \
710 (compound_encode_hdr_maxsz + \
711 encode_create_session_maxsz)
712 #define NFS4_dec_create_session_sz \
713 (compound_decode_hdr_maxsz + \
714 decode_create_session_maxsz)
715 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
716 encode_destroy_session_maxsz)
717 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
718 decode_destroy_session_maxsz)
719 #define NFS4_enc_sequence_sz \
720 (compound_decode_hdr_maxsz + \
721 encode_sequence_maxsz)
722 #define NFS4_dec_sequence_sz \
723 (compound_decode_hdr_maxsz + \
724 decode_sequence_maxsz)
725 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putrootfh_maxsz + \
728 encode_fsinfo_maxsz)
729 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putrootfh_maxsz + \
732 decode_fsinfo_maxsz)
733 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_reclaim_complete_maxsz)
736 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
737 decode_sequence_maxsz + \
738 decode_reclaim_complete_maxsz)
739 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
740 encode_sequence_maxsz +\
741 encode_getdeviceinfo_maxsz)
742 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
743 decode_sequence_maxsz + \
744 decode_getdeviceinfo_maxsz)
745 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
746 encode_sequence_maxsz + \
747 encode_putfh_maxsz + \
748 encode_layoutget_maxsz)
749 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_layoutget_maxsz)
753 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
754 encode_sequence_maxsz +\
755 encode_putfh_maxsz + \
756 encode_layoutcommit_maxsz + \
757 encode_getattr_maxsz)
758 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
759 decode_sequence_maxsz + \
760 decode_putfh_maxsz + \
761 decode_layoutcommit_maxsz + \
762 decode_getattr_maxsz)
763
764
765 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
766 compound_encode_hdr_maxsz +
767 encode_sequence_maxsz +
768 encode_putfh_maxsz +
769 encode_getattr_maxsz) *
770 XDR_UNIT);
771
772 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
773 compound_decode_hdr_maxsz +
774 decode_sequence_maxsz +
775 decode_putfh_maxsz) *
776 XDR_UNIT);
777 #endif /* CONFIG_NFS_V4_1 */
778
779 static const umode_t nfs_type2fmt[] = {
780 [NF4BAD] = 0,
781 [NF4REG] = S_IFREG,
782 [NF4DIR] = S_IFDIR,
783 [NF4BLK] = S_IFBLK,
784 [NF4CHR] = S_IFCHR,
785 [NF4LNK] = S_IFLNK,
786 [NF4SOCK] = S_IFSOCK,
787 [NF4FIFO] = S_IFIFO,
788 [NF4ATTRDIR] = 0,
789 [NF4NAMEDATTR] = 0,
790 };
791
792 struct compound_hdr {
793 int32_t status;
794 uint32_t nops;
795 __be32 * nops_p;
796 uint32_t taglen;
797 char * tag;
798 uint32_t replen; /* expected reply words */
799 u32 minorversion;
800 };
801
802 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
803 {
804 __be32 *p = xdr_reserve_space(xdr, nbytes);
805 BUG_ON(!p);
806 return p;
807 }
808
809 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
810 {
811 __be32 *p;
812
813 p = xdr_reserve_space(xdr, 4 + len);
814 BUG_ON(p == NULL);
815 xdr_encode_opaque(p, str, len);
816 }
817
818 static void encode_compound_hdr(struct xdr_stream *xdr,
819 struct rpc_rqst *req,
820 struct compound_hdr *hdr)
821 {
822 __be32 *p;
823 struct rpc_auth *auth = req->rq_cred->cr_auth;
824
825 /* initialize running count of expected bytes in reply.
826 * NOTE: the replied tag SHOULD be the same is the one sent,
827 * but this is not required as a MUST for the server to do so. */
828 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
829
830 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
831 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
832 p = reserve_space(xdr, 4 + hdr->taglen + 8);
833 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
834 *p++ = cpu_to_be32(hdr->minorversion);
835 hdr->nops_p = p;
836 *p = cpu_to_be32(hdr->nops);
837 }
838
839 static void encode_nops(struct compound_hdr *hdr)
840 {
841 BUG_ON(hdr->nops > NFS4_MAX_OPS);
842 *hdr->nops_p = htonl(hdr->nops);
843 }
844
845 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
846 {
847 __be32 *p;
848
849 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
850 BUG_ON(p == NULL);
851 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
852 }
853
854 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
855 {
856 char owner_name[IDMAP_NAMESZ];
857 char owner_group[IDMAP_NAMESZ];
858 int owner_namelen = 0;
859 int owner_grouplen = 0;
860 __be32 *p;
861 __be32 *q;
862 int len;
863 uint32_t bmval0 = 0;
864 uint32_t bmval1 = 0;
865
866 /*
867 * We reserve enough space to write the entire attribute buffer at once.
868 * In the worst-case, this would be
869 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
870 * = 36 bytes, plus any contribution from variable-length fields
871 * such as owner/group.
872 */
873 len = 16;
874
875 /* Sigh */
876 if (iap->ia_valid & ATTR_SIZE)
877 len += 8;
878 if (iap->ia_valid & ATTR_MODE)
879 len += 4;
880 if (iap->ia_valid & ATTR_UID) {
881 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
882 if (owner_namelen < 0) {
883 dprintk("nfs: couldn't resolve uid %d to string\n",
884 iap->ia_uid);
885 /* XXX */
886 strcpy(owner_name, "nobody");
887 owner_namelen = sizeof("nobody") - 1;
888 /* goto out; */
889 }
890 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
891 }
892 if (iap->ia_valid & ATTR_GID) {
893 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
894 if (owner_grouplen < 0) {
895 dprintk("nfs: couldn't resolve gid %d to string\n",
896 iap->ia_gid);
897 strcpy(owner_group, "nobody");
898 owner_grouplen = sizeof("nobody") - 1;
899 /* goto out; */
900 }
901 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
902 }
903 if (iap->ia_valid & ATTR_ATIME_SET)
904 len += 16;
905 else if (iap->ia_valid & ATTR_ATIME)
906 len += 4;
907 if (iap->ia_valid & ATTR_MTIME_SET)
908 len += 16;
909 else if (iap->ia_valid & ATTR_MTIME)
910 len += 4;
911 p = reserve_space(xdr, len);
912
913 /*
914 * We write the bitmap length now, but leave the bitmap and the attribute
915 * buffer length to be backfilled at the end of this routine.
916 */
917 *p++ = cpu_to_be32(2);
918 q = p;
919 p += 3;
920
921 if (iap->ia_valid & ATTR_SIZE) {
922 bmval0 |= FATTR4_WORD0_SIZE;
923 p = xdr_encode_hyper(p, iap->ia_size);
924 }
925 if (iap->ia_valid & ATTR_MODE) {
926 bmval1 |= FATTR4_WORD1_MODE;
927 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
928 }
929 if (iap->ia_valid & ATTR_UID) {
930 bmval1 |= FATTR4_WORD1_OWNER;
931 p = xdr_encode_opaque(p, owner_name, owner_namelen);
932 }
933 if (iap->ia_valid & ATTR_GID) {
934 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
935 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
936 }
937 if (iap->ia_valid & ATTR_ATIME_SET) {
938 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
939 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
940 *p++ = cpu_to_be32(0);
941 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
942 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
943 }
944 else if (iap->ia_valid & ATTR_ATIME) {
945 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
946 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
947 }
948 if (iap->ia_valid & ATTR_MTIME_SET) {
949 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
950 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
951 *p++ = cpu_to_be32(0);
952 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
953 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
954 }
955 else if (iap->ia_valid & ATTR_MTIME) {
956 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
957 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
958 }
959
960 /*
961 * Now we backfill the bitmap and the attribute buffer length.
962 */
963 if (len != ((char *)p - (char *)q) + 4) {
964 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
965 len, ((char *)p - (char *)q) + 4);
966 BUG();
967 }
968 len = (char *)p - (char *)q - 12;
969 *q++ = htonl(bmval0);
970 *q++ = htonl(bmval1);
971 *q = htonl(len);
972
973 /* out: */
974 }
975
976 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
977 {
978 __be32 *p;
979
980 p = reserve_space(xdr, 8);
981 *p++ = cpu_to_be32(OP_ACCESS);
982 *p = cpu_to_be32(access);
983 hdr->nops++;
984 hdr->replen += decode_access_maxsz;
985 }
986
987 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
988 {
989 __be32 *p;
990
991 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
992 *p++ = cpu_to_be32(OP_CLOSE);
993 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
994 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
995 hdr->nops++;
996 hdr->replen += decode_close_maxsz;
997 }
998
999 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1000 {
1001 __be32 *p;
1002
1003 p = reserve_space(xdr, 16);
1004 *p++ = cpu_to_be32(OP_COMMIT);
1005 p = xdr_encode_hyper(p, args->offset);
1006 *p = cpu_to_be32(args->count);
1007 hdr->nops++;
1008 hdr->replen += decode_commit_maxsz;
1009 }
1010
1011 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1012 {
1013 __be32 *p;
1014
1015 p = reserve_space(xdr, 8);
1016 *p++ = cpu_to_be32(OP_CREATE);
1017 *p = cpu_to_be32(create->ftype);
1018
1019 switch (create->ftype) {
1020 case NF4LNK:
1021 p = reserve_space(xdr, 4);
1022 *p = cpu_to_be32(create->u.symlink.len);
1023 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1024 break;
1025
1026 case NF4BLK: case NF4CHR:
1027 p = reserve_space(xdr, 8);
1028 *p++ = cpu_to_be32(create->u.device.specdata1);
1029 *p = cpu_to_be32(create->u.device.specdata2);
1030 break;
1031
1032 default:
1033 break;
1034 }
1035
1036 encode_string(xdr, create->name->len, create->name->name);
1037 hdr->nops++;
1038 hdr->replen += decode_create_maxsz;
1039
1040 encode_attrs(xdr, create->attrs, create->server);
1041 }
1042
1043 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1044 {
1045 __be32 *p;
1046
1047 p = reserve_space(xdr, 12);
1048 *p++ = cpu_to_be32(OP_GETATTR);
1049 *p++ = cpu_to_be32(1);
1050 *p = cpu_to_be32(bitmap);
1051 hdr->nops++;
1052 hdr->replen += decode_getattr_maxsz;
1053 }
1054
1055 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1056 {
1057 __be32 *p;
1058
1059 p = reserve_space(xdr, 16);
1060 *p++ = cpu_to_be32(OP_GETATTR);
1061 *p++ = cpu_to_be32(2);
1062 *p++ = cpu_to_be32(bm0);
1063 *p = cpu_to_be32(bm1);
1064 hdr->nops++;
1065 hdr->replen += decode_getattr_maxsz;
1066 }
1067
1068 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1069 {
1070 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1071 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1072 }
1073
1074 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1075 {
1076 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1077 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1078 }
1079
1080 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1081 {
1082 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1083 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1084 }
1085
1086 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1087 {
1088 __be32 *p;
1089
1090 p = reserve_space(xdr, 4);
1091 *p = cpu_to_be32(OP_GETFH);
1092 hdr->nops++;
1093 hdr->replen += decode_getfh_maxsz;
1094 }
1095
1096 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1097 {
1098 __be32 *p;
1099
1100 p = reserve_space(xdr, 8 + name->len);
1101 *p++ = cpu_to_be32(OP_LINK);
1102 xdr_encode_opaque(p, name->name, name->len);
1103 hdr->nops++;
1104 hdr->replen += decode_link_maxsz;
1105 }
1106
1107 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1108 {
1109 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1110 return block ? NFS4_READW_LT : NFS4_READ_LT;
1111 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1112 }
1113
1114 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1115 {
1116 if (fl->fl_end == OFFSET_MAX)
1117 return ~(uint64_t)0;
1118 return fl->fl_end - fl->fl_start + 1;
1119 }
1120
1121 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1122 {
1123 __be32 *p;
1124
1125 p = reserve_space(xdr, 32);
1126 p = xdr_encode_hyper(p, lowner->clientid);
1127 *p++ = cpu_to_be32(20);
1128 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1129 *p++ = cpu_to_be32(lowner->s_dev);
1130 xdr_encode_hyper(p, lowner->id);
1131 }
1132
1133 /*
1134 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1135 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1136 */
1137 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1138 {
1139 __be32 *p;
1140
1141 p = reserve_space(xdr, 32);
1142 *p++ = cpu_to_be32(OP_LOCK);
1143 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1144 *p++ = cpu_to_be32(args->reclaim);
1145 p = xdr_encode_hyper(p, args->fl->fl_start);
1146 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1147 *p = cpu_to_be32(args->new_lock_owner);
1148 if (args->new_lock_owner){
1149 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1150 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1151 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1152 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1153 encode_lockowner(xdr, &args->lock_owner);
1154 }
1155 else {
1156 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1157 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1158 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1159 }
1160 hdr->nops++;
1161 hdr->replen += decode_lock_maxsz;
1162 }
1163
1164 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1165 {
1166 __be32 *p;
1167
1168 p = reserve_space(xdr, 24);
1169 *p++ = cpu_to_be32(OP_LOCKT);
1170 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1171 p = xdr_encode_hyper(p, args->fl->fl_start);
1172 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1173 encode_lockowner(xdr, &args->lock_owner);
1174 hdr->nops++;
1175 hdr->replen += decode_lockt_maxsz;
1176 }
1177
1178 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1179 {
1180 __be32 *p;
1181
1182 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1183 *p++ = cpu_to_be32(OP_LOCKU);
1184 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1185 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1186 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1187 p = xdr_encode_hyper(p, args->fl->fl_start);
1188 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1189 hdr->nops++;
1190 hdr->replen += decode_locku_maxsz;
1191 }
1192
1193 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1194 {
1195 __be32 *p;
1196
1197 p = reserve_space(xdr, 4);
1198 *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1199 encode_lockowner(xdr, lowner);
1200 hdr->nops++;
1201 hdr->replen += decode_release_lockowner_maxsz;
1202 }
1203
1204 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1205 {
1206 int len = name->len;
1207 __be32 *p;
1208
1209 p = reserve_space(xdr, 8 + len);
1210 *p++ = cpu_to_be32(OP_LOOKUP);
1211 xdr_encode_opaque(p, name->name, len);
1212 hdr->nops++;
1213 hdr->replen += decode_lookup_maxsz;
1214 }
1215
1216 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1217 {
1218 __be32 *p;
1219
1220 p = reserve_space(xdr, 8);
1221 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1222 case FMODE_READ:
1223 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1224 break;
1225 case FMODE_WRITE:
1226 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1227 break;
1228 case FMODE_READ|FMODE_WRITE:
1229 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1230 break;
1231 default:
1232 *p++ = cpu_to_be32(0);
1233 }
1234 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1235 }
1236
1237 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1238 {
1239 __be32 *p;
1240 /*
1241 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1242 * owner 4 = 32
1243 */
1244 p = reserve_space(xdr, 8);
1245 *p++ = cpu_to_be32(OP_OPEN);
1246 *p = cpu_to_be32(arg->seqid->sequence->counter);
1247 encode_share_access(xdr, arg->fmode);
1248 p = reserve_space(xdr, 32);
1249 p = xdr_encode_hyper(p, arg->clientid);
1250 *p++ = cpu_to_be32(20);
1251 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1252 *p++ = cpu_to_be32(arg->server->s_dev);
1253 xdr_encode_hyper(p, arg->id);
1254 }
1255
1256 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1257 {
1258 __be32 *p;
1259 struct nfs_client *clp;
1260
1261 p = reserve_space(xdr, 4);
1262 switch(arg->open_flags & O_EXCL) {
1263 case 0:
1264 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1265 encode_attrs(xdr, arg->u.attrs, arg->server);
1266 break;
1267 default:
1268 clp = arg->server->nfs_client;
1269 if (clp->cl_mvops->minor_version > 0) {
1270 if (nfs4_has_persistent_session(clp)) {
1271 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1272 encode_attrs(xdr, arg->u.attrs, arg->server);
1273 } else {
1274 struct iattr dummy;
1275
1276 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1277 encode_nfs4_verifier(xdr, &arg->u.verifier);
1278 dummy.ia_valid = 0;
1279 encode_attrs(xdr, &dummy, arg->server);
1280 }
1281 } else {
1282 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1283 encode_nfs4_verifier(xdr, &arg->u.verifier);
1284 }
1285 }
1286 }
1287
1288 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1289 {
1290 __be32 *p;
1291
1292 p = reserve_space(xdr, 4);
1293 switch (arg->open_flags & O_CREAT) {
1294 case 0:
1295 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1296 break;
1297 default:
1298 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1299 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1300 encode_createmode(xdr, arg);
1301 }
1302 }
1303
1304 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1305 {
1306 __be32 *p;
1307
1308 p = reserve_space(xdr, 4);
1309 switch (delegation_type) {
1310 case 0:
1311 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1312 break;
1313 case FMODE_READ:
1314 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1315 break;
1316 case FMODE_WRITE|FMODE_READ:
1317 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1318 break;
1319 default:
1320 BUG();
1321 }
1322 }
1323
1324 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1325 {
1326 __be32 *p;
1327
1328 p = reserve_space(xdr, 4);
1329 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1330 encode_string(xdr, name->len, name->name);
1331 }
1332
1333 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1334 {
1335 __be32 *p;
1336
1337 p = reserve_space(xdr, 4);
1338 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1339 encode_delegation_type(xdr, type);
1340 }
1341
1342 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1343 {
1344 __be32 *p;
1345
1346 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1347 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1348 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1349 encode_string(xdr, name->len, name->name);
1350 }
1351
1352 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1353 {
1354 encode_openhdr(xdr, arg);
1355 encode_opentype(xdr, arg);
1356 switch (arg->claim) {
1357 case NFS4_OPEN_CLAIM_NULL:
1358 encode_claim_null(xdr, arg->name);
1359 break;
1360 case NFS4_OPEN_CLAIM_PREVIOUS:
1361 encode_claim_previous(xdr, arg->u.delegation_type);
1362 break;
1363 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1364 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1365 break;
1366 default:
1367 BUG();
1368 }
1369 hdr->nops++;
1370 hdr->replen += decode_open_maxsz;
1371 }
1372
1373 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1374 {
1375 __be32 *p;
1376
1377 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1378 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1379 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1380 *p = cpu_to_be32(arg->seqid->sequence->counter);
1381 hdr->nops++;
1382 hdr->replen += decode_open_confirm_maxsz;
1383 }
1384
1385 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1386 {
1387 __be32 *p;
1388
1389 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1390 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1391 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1392 *p = cpu_to_be32(arg->seqid->sequence->counter);
1393 encode_share_access(xdr, arg->fmode);
1394 hdr->nops++;
1395 hdr->replen += decode_open_downgrade_maxsz;
1396 }
1397
1398 static void
1399 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1400 {
1401 int len = fh->size;
1402 __be32 *p;
1403
1404 p = reserve_space(xdr, 8 + len);
1405 *p++ = cpu_to_be32(OP_PUTFH);
1406 xdr_encode_opaque(p, fh->data, len);
1407 hdr->nops++;
1408 hdr->replen += decode_putfh_maxsz;
1409 }
1410
1411 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1412 {
1413 __be32 *p;
1414
1415 p = reserve_space(xdr, 4);
1416 *p = cpu_to_be32(OP_PUTROOTFH);
1417 hdr->nops++;
1418 hdr->replen += decode_putrootfh_maxsz;
1419 }
1420
1421 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1422 {
1423 nfs4_stateid stateid;
1424 __be32 *p;
1425
1426 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1427 if (ctx->state != NULL) {
1428 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1429 if (zero_seqid)
1430 stateid.stateid.seqid = 0;
1431 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1432 } else
1433 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1434 }
1435
1436 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1437 {
1438 __be32 *p;
1439
1440 p = reserve_space(xdr, 4);
1441 *p = cpu_to_be32(OP_READ);
1442
1443 encode_stateid(xdr, args->context, args->lock_context,
1444 hdr->minorversion);
1445
1446 p = reserve_space(xdr, 12);
1447 p = xdr_encode_hyper(p, args->offset);
1448 *p = cpu_to_be32(args->count);
1449 hdr->nops++;
1450 hdr->replen += decode_read_maxsz;
1451 }
1452
1453 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1454 {
1455 uint32_t attrs[2] = {0, 0};
1456 uint32_t dircount = readdir->count >> 1;
1457 __be32 *p;
1458
1459 if (readdir->plus) {
1460 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1461 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1462 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1463 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1464 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1465 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1466 dircount >>= 1;
1467 }
1468 attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1469 attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1470 /* Switch to mounted_on_fileid if the server supports it */
1471 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1472 attrs[0] &= ~FATTR4_WORD0_FILEID;
1473 else
1474 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1475
1476 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1477 *p++ = cpu_to_be32(OP_READDIR);
1478 p = xdr_encode_hyper(p, readdir->cookie);
1479 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1480 *p++ = cpu_to_be32(dircount);
1481 *p++ = cpu_to_be32(readdir->count);
1482 *p++ = cpu_to_be32(2);
1483
1484 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1485 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1486 hdr->nops++;
1487 hdr->replen += decode_readdir_maxsz;
1488 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1489 __func__,
1490 (unsigned long long)readdir->cookie,
1491 ((u32 *)readdir->verifier.data)[0],
1492 ((u32 *)readdir->verifier.data)[1],
1493 attrs[0] & readdir->bitmask[0],
1494 attrs[1] & readdir->bitmask[1]);
1495 }
1496
1497 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(OP_READLINK);
1503 hdr->nops++;
1504 hdr->replen += decode_readlink_maxsz;
1505 }
1506
1507 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1508 {
1509 __be32 *p;
1510
1511 p = reserve_space(xdr, 8 + name->len);
1512 *p++ = cpu_to_be32(OP_REMOVE);
1513 xdr_encode_opaque(p, name->name, name->len);
1514 hdr->nops++;
1515 hdr->replen += decode_remove_maxsz;
1516 }
1517
1518 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1519 {
1520 __be32 *p;
1521
1522 p = reserve_space(xdr, 4);
1523 *p = cpu_to_be32(OP_RENAME);
1524 encode_string(xdr, oldname->len, oldname->name);
1525 encode_string(xdr, newname->len, newname->name);
1526 hdr->nops++;
1527 hdr->replen += decode_rename_maxsz;
1528 }
1529
1530 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1531 {
1532 __be32 *p;
1533
1534 p = reserve_space(xdr, 12);
1535 *p++ = cpu_to_be32(OP_RENEW);
1536 xdr_encode_hyper(p, client_stateid->cl_clientid);
1537 hdr->nops++;
1538 hdr->replen += decode_renew_maxsz;
1539 }
1540
1541 static void
1542 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1543 {
1544 __be32 *p;
1545
1546 p = reserve_space(xdr, 4);
1547 *p = cpu_to_be32(OP_RESTOREFH);
1548 hdr->nops++;
1549 hdr->replen += decode_restorefh_maxsz;
1550 }
1551
1552 static void
1553 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1554 {
1555 __be32 *p;
1556
1557 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1558 *p++ = cpu_to_be32(OP_SETATTR);
1559 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1560 p = reserve_space(xdr, 2*4);
1561 *p++ = cpu_to_be32(1);
1562 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1563 BUG_ON(arg->acl_len % 4);
1564 p = reserve_space(xdr, 4);
1565 *p = cpu_to_be32(arg->acl_len);
1566 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1567 hdr->nops++;
1568 hdr->replen += decode_setacl_maxsz;
1569 }
1570
1571 static void
1572 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574 __be32 *p;
1575
1576 p = reserve_space(xdr, 4);
1577 *p = cpu_to_be32(OP_SAVEFH);
1578 hdr->nops++;
1579 hdr->replen += decode_savefh_maxsz;
1580 }
1581
1582 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1583 {
1584 __be32 *p;
1585
1586 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1587 *p++ = cpu_to_be32(OP_SETATTR);
1588 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1589 hdr->nops++;
1590 hdr->replen += decode_setattr_maxsz;
1591 encode_attrs(xdr, arg->iap, server);
1592 }
1593
1594 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1595 {
1596 __be32 *p;
1597
1598 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1599 *p++ = cpu_to_be32(OP_SETCLIENTID);
1600 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1601
1602 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1603 p = reserve_space(xdr, 4);
1604 *p = cpu_to_be32(setclientid->sc_prog);
1605 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1606 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1607 p = reserve_space(xdr, 4);
1608 *p = cpu_to_be32(setclientid->sc_cb_ident);
1609 hdr->nops++;
1610 hdr->replen += decode_setclientid_maxsz;
1611 }
1612
1613 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1614 {
1615 __be32 *p;
1616
1617 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1618 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1619 p = xdr_encode_hyper(p, arg->clientid);
1620 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1621 hdr->nops++;
1622 hdr->replen += decode_setclientid_confirm_maxsz;
1623 }
1624
1625 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1626 {
1627 __be32 *p;
1628
1629 p = reserve_space(xdr, 4);
1630 *p = cpu_to_be32(OP_WRITE);
1631
1632 encode_stateid(xdr, args->context, args->lock_context,
1633 hdr->minorversion);
1634
1635 p = reserve_space(xdr, 16);
1636 p = xdr_encode_hyper(p, args->offset);
1637 *p++ = cpu_to_be32(args->stable);
1638 *p = cpu_to_be32(args->count);
1639
1640 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1641 hdr->nops++;
1642 hdr->replen += decode_write_maxsz;
1643 }
1644
1645 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1646 {
1647 __be32 *p;
1648
1649 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1650
1651 *p++ = cpu_to_be32(OP_DELEGRETURN);
1652 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1653 hdr->nops++;
1654 hdr->replen += decode_delegreturn_maxsz;
1655 }
1656
1657 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1658 {
1659 int len = name->len;
1660 __be32 *p;
1661
1662 p = reserve_space(xdr, 8 + len);
1663 *p++ = cpu_to_be32(OP_SECINFO);
1664 xdr_encode_opaque(p, name->name, len);
1665 hdr->nops++;
1666 hdr->replen += decode_secinfo_maxsz;
1667 }
1668
1669 #if defined(CONFIG_NFS_V4_1)
1670 /* NFSv4.1 operations */
1671 static void encode_exchange_id(struct xdr_stream *xdr,
1672 struct nfs41_exchange_id_args *args,
1673 struct compound_hdr *hdr)
1674 {
1675 __be32 *p;
1676
1677 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1678 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1679 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1680
1681 encode_string(xdr, args->id_len, args->id);
1682
1683 p = reserve_space(xdr, 12);
1684 *p++ = cpu_to_be32(args->flags);
1685 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1686 *p = cpu_to_be32(0); /* zero length implementation id array */
1687 hdr->nops++;
1688 hdr->replen += decode_exchange_id_maxsz;
1689 }
1690
1691 static void encode_create_session(struct xdr_stream *xdr,
1692 struct nfs41_create_session_args *args,
1693 struct compound_hdr *hdr)
1694 {
1695 __be32 *p;
1696 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1697 uint32_t len;
1698 struct nfs_client *clp = args->client;
1699 u32 max_resp_sz_cached;
1700
1701 /*
1702 * Assumes OPEN is the biggest non-idempotent compound.
1703 * 2 is the verifier.
1704 */
1705 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1706 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1707
1708 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1709 clp->cl_ipaddr);
1710
1711 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1712 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1713 p = xdr_encode_hyper(p, clp->cl_clientid);
1714 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1715 *p++ = cpu_to_be32(args->flags); /*flags */
1716
1717 /* Fore Channel */
1718 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1719 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1720 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1721 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1722 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1723 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1724 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1725
1726 /* Back Channel */
1727 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1728 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1729 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1730 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1731 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1732 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1733 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1734
1735 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1736 *p++ = cpu_to_be32(1);
1737 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1738
1739 /* authsys_parms rfc1831 */
1740 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1741 p = xdr_encode_opaque(p, machine_name, len);
1742 *p++ = cpu_to_be32(0); /* UID */
1743 *p++ = cpu_to_be32(0); /* GID */
1744 *p = cpu_to_be32(0); /* No more gids */
1745 hdr->nops++;
1746 hdr->replen += decode_create_session_maxsz;
1747 }
1748
1749 static void encode_destroy_session(struct xdr_stream *xdr,
1750 struct nfs4_session *session,
1751 struct compound_hdr *hdr)
1752 {
1753 __be32 *p;
1754 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1755 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1756 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1757 hdr->nops++;
1758 hdr->replen += decode_destroy_session_maxsz;
1759 }
1760
1761 static void encode_reclaim_complete(struct xdr_stream *xdr,
1762 struct nfs41_reclaim_complete_args *args,
1763 struct compound_hdr *hdr)
1764 {
1765 __be32 *p;
1766
1767 p = reserve_space(xdr, 8);
1768 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1769 *p++ = cpu_to_be32(args->one_fs);
1770 hdr->nops++;
1771 hdr->replen += decode_reclaim_complete_maxsz;
1772 }
1773 #endif /* CONFIG_NFS_V4_1 */
1774
1775 static void encode_sequence(struct xdr_stream *xdr,
1776 const struct nfs4_sequence_args *args,
1777 struct compound_hdr *hdr)
1778 {
1779 #if defined(CONFIG_NFS_V4_1)
1780 struct nfs4_session *session = args->sa_session;
1781 struct nfs4_slot_table *tp;
1782 struct nfs4_slot *slot;
1783 __be32 *p;
1784
1785 if (!session)
1786 return;
1787
1788 tp = &session->fc_slot_table;
1789
1790 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1791 slot = tp->slots + args->sa_slotid;
1792
1793 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1794 *p++ = cpu_to_be32(OP_SEQUENCE);
1795
1796 /*
1797 * Sessionid + seqid + slotid + max slotid + cache_this
1798 */
1799 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1800 "max_slotid=%d cache_this=%d\n",
1801 __func__,
1802 ((u32 *)session->sess_id.data)[0],
1803 ((u32 *)session->sess_id.data)[1],
1804 ((u32 *)session->sess_id.data)[2],
1805 ((u32 *)session->sess_id.data)[3],
1806 slot->seq_nr, args->sa_slotid,
1807 tp->highest_used_slotid, args->sa_cache_this);
1808 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1809 *p++ = cpu_to_be32(slot->seq_nr);
1810 *p++ = cpu_to_be32(args->sa_slotid);
1811 *p++ = cpu_to_be32(tp->highest_used_slotid);
1812 *p = cpu_to_be32(args->sa_cache_this);
1813 hdr->nops++;
1814 hdr->replen += decode_sequence_maxsz;
1815 #endif /* CONFIG_NFS_V4_1 */
1816 }
1817
1818 #ifdef CONFIG_NFS_V4_1
1819 static void
1820 encode_getdeviceinfo(struct xdr_stream *xdr,
1821 const struct nfs4_getdeviceinfo_args *args,
1822 struct compound_hdr *hdr)
1823 {
1824 __be32 *p;
1825
1826 p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1827 *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1828 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1829 NFS4_DEVICEID4_SIZE);
1830 *p++ = cpu_to_be32(args->pdev->layout_type);
1831 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1832 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1833 hdr->nops++;
1834 hdr->replen += decode_getdeviceinfo_maxsz;
1835 }
1836
1837 static void
1838 encode_layoutget(struct xdr_stream *xdr,
1839 const struct nfs4_layoutget_args *args,
1840 struct compound_hdr *hdr)
1841 {
1842 __be32 *p;
1843
1844 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1845 *p++ = cpu_to_be32(OP_LAYOUTGET);
1846 *p++ = cpu_to_be32(0); /* Signal layout available */
1847 *p++ = cpu_to_be32(args->type);
1848 *p++ = cpu_to_be32(args->range.iomode);
1849 p = xdr_encode_hyper(p, args->range.offset);
1850 p = xdr_encode_hyper(p, args->range.length);
1851 p = xdr_encode_hyper(p, args->minlength);
1852 p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1853 *p = cpu_to_be32(args->maxcount);
1854
1855 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1856 __func__,
1857 args->type,
1858 args->range.iomode,
1859 (unsigned long)args->range.offset,
1860 (unsigned long)args->range.length,
1861 args->maxcount);
1862 hdr->nops++;
1863 hdr->replen += decode_layoutget_maxsz;
1864 }
1865
1866 static int
1867 encode_layoutcommit(struct xdr_stream *xdr,
1868 const struct nfs4_layoutcommit_args *args,
1869 struct compound_hdr *hdr)
1870 {
1871 __be32 *p;
1872
1873 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1874 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1875
1876 p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
1877 *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1878 /* Only whole file layouts */
1879 p = xdr_encode_hyper(p, 0); /* offset */
1880 p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
1881 *p++ = cpu_to_be32(0); /* reclaim */
1882 p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1883 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1884 p = xdr_encode_hyper(p, args->lastbytewritten);
1885 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1886 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1887 *p++ = cpu_to_be32(0); /* no file layout payload */
1888
1889 hdr->nops++;
1890 hdr->replen += decode_layoutcommit_maxsz;
1891 return 0;
1892 }
1893 #endif /* CONFIG_NFS_V4_1 */
1894
1895 /*
1896 * END OF "GENERIC" ENCODE ROUTINES.
1897 */
1898
1899 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1900 {
1901 #if defined(CONFIG_NFS_V4_1)
1902 if (args->sa_session)
1903 return args->sa_session->clp->cl_mvops->minor_version;
1904 #endif /* CONFIG_NFS_V4_1 */
1905 return 0;
1906 }
1907
1908 /*
1909 * Encode an ACCESS request
1910 */
1911 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1912 const struct nfs4_accessargs *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->fh, &hdr);
1921 encode_access(xdr, args->access, &hdr);
1922 encode_getfattr(xdr, args->bitmask, &hdr);
1923 encode_nops(&hdr);
1924 }
1925
1926 /*
1927 * Encode LOOKUP request
1928 */
1929 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1930 const struct nfs4_lookup_arg *args)
1931 {
1932 struct compound_hdr hdr = {
1933 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1934 };
1935
1936 encode_compound_hdr(xdr, req, &hdr);
1937 encode_sequence(xdr, &args->seq_args, &hdr);
1938 encode_putfh(xdr, args->dir_fh, &hdr);
1939 encode_lookup(xdr, args->name, &hdr);
1940 encode_getfh(xdr, &hdr);
1941 encode_getfattr(xdr, args->bitmask, &hdr);
1942 encode_nops(&hdr);
1943 }
1944
1945 /*
1946 * Encode LOOKUP_ROOT request
1947 */
1948 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1949 struct xdr_stream *xdr,
1950 const struct nfs4_lookup_root_arg *args)
1951 {
1952 struct compound_hdr hdr = {
1953 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1954 };
1955
1956 encode_compound_hdr(xdr, req, &hdr);
1957 encode_sequence(xdr, &args->seq_args, &hdr);
1958 encode_putrootfh(xdr, &hdr);
1959 encode_getfh(xdr, &hdr);
1960 encode_getfattr(xdr, args->bitmask, &hdr);
1961 encode_nops(&hdr);
1962 }
1963
1964 /*
1965 * Encode REMOVE request
1966 */
1967 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1968 const struct nfs_removeargs *args)
1969 {
1970 struct compound_hdr hdr = {
1971 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1972 };
1973
1974 encode_compound_hdr(xdr, req, &hdr);
1975 encode_sequence(xdr, &args->seq_args, &hdr);
1976 encode_putfh(xdr, args->fh, &hdr);
1977 encode_remove(xdr, &args->name, &hdr);
1978 encode_getfattr(xdr, args->bitmask, &hdr);
1979 encode_nops(&hdr);
1980 }
1981
1982 /*
1983 * Encode RENAME request
1984 */
1985 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1986 const struct nfs_renameargs *args)
1987 {
1988 struct compound_hdr hdr = {
1989 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1990 };
1991
1992 encode_compound_hdr(xdr, req, &hdr);
1993 encode_sequence(xdr, &args->seq_args, &hdr);
1994 encode_putfh(xdr, args->old_dir, &hdr);
1995 encode_savefh(xdr, &hdr);
1996 encode_putfh(xdr, args->new_dir, &hdr);
1997 encode_rename(xdr, args->old_name, args->new_name, &hdr);
1998 encode_getfattr(xdr, args->bitmask, &hdr);
1999 encode_restorefh(xdr, &hdr);
2000 encode_getfattr(xdr, args->bitmask, &hdr);
2001 encode_nops(&hdr);
2002 }
2003
2004 /*
2005 * Encode LINK request
2006 */
2007 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2008 const struct nfs4_link_arg *args)
2009 {
2010 struct compound_hdr hdr = {
2011 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2012 };
2013
2014 encode_compound_hdr(xdr, req, &hdr);
2015 encode_sequence(xdr, &args->seq_args, &hdr);
2016 encode_putfh(xdr, args->fh, &hdr);
2017 encode_savefh(xdr, &hdr);
2018 encode_putfh(xdr, args->dir_fh, &hdr);
2019 encode_link(xdr, args->name, &hdr);
2020 encode_getfattr(xdr, args->bitmask, &hdr);
2021 encode_restorefh(xdr, &hdr);
2022 encode_getfattr(xdr, args->bitmask, &hdr);
2023 encode_nops(&hdr);
2024 }
2025
2026 /*
2027 * Encode CREATE request
2028 */
2029 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2030 const struct nfs4_create_arg *args)
2031 {
2032 struct compound_hdr hdr = {
2033 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2034 };
2035
2036 encode_compound_hdr(xdr, req, &hdr);
2037 encode_sequence(xdr, &args->seq_args, &hdr);
2038 encode_putfh(xdr, args->dir_fh, &hdr);
2039 encode_savefh(xdr, &hdr);
2040 encode_create(xdr, args, &hdr);
2041 encode_getfh(xdr, &hdr);
2042 encode_getfattr(xdr, args->bitmask, &hdr);
2043 encode_restorefh(xdr, &hdr);
2044 encode_getfattr(xdr, args->bitmask, &hdr);
2045 encode_nops(&hdr);
2046 }
2047
2048 /*
2049 * Encode SYMLINK request
2050 */
2051 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2052 const struct nfs4_create_arg *args)
2053 {
2054 nfs4_xdr_enc_create(req, xdr, args);
2055 }
2056
2057 /*
2058 * Encode GETATTR request
2059 */
2060 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2061 const struct nfs4_getattr_arg *args)
2062 {
2063 struct compound_hdr hdr = {
2064 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2065 };
2066
2067 encode_compound_hdr(xdr, req, &hdr);
2068 encode_sequence(xdr, &args->seq_args, &hdr);
2069 encode_putfh(xdr, args->fh, &hdr);
2070 encode_getfattr(xdr, args->bitmask, &hdr);
2071 encode_nops(&hdr);
2072 }
2073
2074 /*
2075 * Encode a CLOSE request
2076 */
2077 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2078 struct nfs_closeargs *args)
2079 {
2080 struct compound_hdr hdr = {
2081 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082 };
2083
2084 encode_compound_hdr(xdr, req, &hdr);
2085 encode_sequence(xdr, &args->seq_args, &hdr);
2086 encode_putfh(xdr, args->fh, &hdr);
2087 encode_close(xdr, args, &hdr);
2088 encode_getfattr(xdr, args->bitmask, &hdr);
2089 encode_nops(&hdr);
2090 }
2091
2092 /*
2093 * Encode an OPEN request
2094 */
2095 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2096 struct nfs_openargs *args)
2097 {
2098 struct compound_hdr hdr = {
2099 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2100 };
2101
2102 encode_compound_hdr(xdr, req, &hdr);
2103 encode_sequence(xdr, &args->seq_args, &hdr);
2104 encode_putfh(xdr, args->fh, &hdr);
2105 encode_savefh(xdr, &hdr);
2106 encode_open(xdr, args, &hdr);
2107 encode_getfh(xdr, &hdr);
2108 encode_getfattr(xdr, args->bitmask, &hdr);
2109 encode_restorefh(xdr, &hdr);
2110 encode_getfattr(xdr, args->bitmask, &hdr);
2111 encode_nops(&hdr);
2112 }
2113
2114 /*
2115 * Encode an OPEN_CONFIRM request
2116 */
2117 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2118 struct xdr_stream *xdr,
2119 struct nfs_open_confirmargs *args)
2120 {
2121 struct compound_hdr hdr = {
2122 .nops = 0,
2123 };
2124
2125 encode_compound_hdr(xdr, req, &hdr);
2126 encode_putfh(xdr, args->fh, &hdr);
2127 encode_open_confirm(xdr, args, &hdr);
2128 encode_nops(&hdr);
2129 }
2130
2131 /*
2132 * Encode an OPEN request with no attributes.
2133 */
2134 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2135 struct xdr_stream *xdr,
2136 struct nfs_openargs *args)
2137 {
2138 struct compound_hdr hdr = {
2139 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140 };
2141
2142 encode_compound_hdr(xdr, req, &hdr);
2143 encode_sequence(xdr, &args->seq_args, &hdr);
2144 encode_putfh(xdr, args->fh, &hdr);
2145 encode_open(xdr, args, &hdr);
2146 encode_getfattr(xdr, args->bitmask, &hdr);
2147 encode_nops(&hdr);
2148 }
2149
2150 /*
2151 * Encode an OPEN_DOWNGRADE request
2152 */
2153 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2154 struct xdr_stream *xdr,
2155 struct nfs_closeargs *args)
2156 {
2157 struct compound_hdr hdr = {
2158 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159 };
2160
2161 encode_compound_hdr(xdr, req, &hdr);
2162 encode_sequence(xdr, &args->seq_args, &hdr);
2163 encode_putfh(xdr, args->fh, &hdr);
2164 encode_open_downgrade(xdr, args, &hdr);
2165 encode_getfattr(xdr, args->bitmask, &hdr);
2166 encode_nops(&hdr);
2167 }
2168
2169 /*
2170 * Encode a LOCK request
2171 */
2172 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2173 struct nfs_lock_args *args)
2174 {
2175 struct compound_hdr hdr = {
2176 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177 };
2178
2179 encode_compound_hdr(xdr, req, &hdr);
2180 encode_sequence(xdr, &args->seq_args, &hdr);
2181 encode_putfh(xdr, args->fh, &hdr);
2182 encode_lock(xdr, args, &hdr);
2183 encode_nops(&hdr);
2184 }
2185
2186 /*
2187 * Encode a LOCKT request
2188 */
2189 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2190 struct nfs_lockt_args *args)
2191 {
2192 struct compound_hdr hdr = {
2193 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2194 };
2195
2196 encode_compound_hdr(xdr, req, &hdr);
2197 encode_sequence(xdr, &args->seq_args, &hdr);
2198 encode_putfh(xdr, args->fh, &hdr);
2199 encode_lockt(xdr, args, &hdr);
2200 encode_nops(&hdr);
2201 }
2202
2203 /*
2204 * Encode a LOCKU request
2205 */
2206 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2207 struct nfs_locku_args *args)
2208 {
2209 struct compound_hdr hdr = {
2210 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211 };
2212
2213 encode_compound_hdr(xdr, req, &hdr);
2214 encode_sequence(xdr, &args->seq_args, &hdr);
2215 encode_putfh(xdr, args->fh, &hdr);
2216 encode_locku(xdr, args, &hdr);
2217 encode_nops(&hdr);
2218 }
2219
2220 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2221 struct xdr_stream *xdr,
2222 struct nfs_release_lockowner_args *args)
2223 {
2224 struct compound_hdr hdr = {
2225 .minorversion = 0,
2226 };
2227
2228 encode_compound_hdr(xdr, req, &hdr);
2229 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2230 encode_nops(&hdr);
2231 }
2232
2233 /*
2234 * Encode a READLINK request
2235 */
2236 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2237 const struct nfs4_readlink *args)
2238 {
2239 struct compound_hdr hdr = {
2240 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241 };
2242
2243 encode_compound_hdr(xdr, req, &hdr);
2244 encode_sequence(xdr, &args->seq_args, &hdr);
2245 encode_putfh(xdr, args->fh, &hdr);
2246 encode_readlink(xdr, args, req, &hdr);
2247
2248 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2249 args->pgbase, args->pglen);
2250 encode_nops(&hdr);
2251 }
2252
2253 /*
2254 * Encode a READDIR request
2255 */
2256 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2257 const struct nfs4_readdir_arg *args)
2258 {
2259 struct compound_hdr hdr = {
2260 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261 };
2262
2263 encode_compound_hdr(xdr, req, &hdr);
2264 encode_sequence(xdr, &args->seq_args, &hdr);
2265 encode_putfh(xdr, args->fh, &hdr);
2266 encode_readdir(xdr, args, req, &hdr);
2267
2268 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2269 args->pgbase, args->count);
2270 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2271 __func__, hdr.replen << 2, args->pages,
2272 args->pgbase, args->count);
2273 encode_nops(&hdr);
2274 }
2275
2276 /*
2277 * Encode a READ request
2278 */
2279 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2280 struct nfs_readargs *args)
2281 {
2282 struct compound_hdr hdr = {
2283 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284 };
2285
2286 encode_compound_hdr(xdr, req, &hdr);
2287 encode_sequence(xdr, &args->seq_args, &hdr);
2288 encode_putfh(xdr, args->fh, &hdr);
2289 encode_read(xdr, args, &hdr);
2290
2291 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2292 args->pages, args->pgbase, args->count);
2293 req->rq_rcv_buf.flags |= XDRBUF_READ;
2294 encode_nops(&hdr);
2295 }
2296
2297 /*
2298 * Encode an SETATTR request
2299 */
2300 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2301 struct nfs_setattrargs *args)
2302 {
2303 struct compound_hdr hdr = {
2304 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2305 };
2306
2307 encode_compound_hdr(xdr, req, &hdr);
2308 encode_sequence(xdr, &args->seq_args, &hdr);
2309 encode_putfh(xdr, args->fh, &hdr);
2310 encode_setattr(xdr, args, args->server, &hdr);
2311 encode_getfattr(xdr, args->bitmask, &hdr);
2312 encode_nops(&hdr);
2313 }
2314
2315 /*
2316 * Encode a GETACL request
2317 */
2318 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2319 struct nfs_getaclargs *args)
2320 {
2321 struct compound_hdr hdr = {
2322 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2323 };
2324 uint32_t replen;
2325
2326 encode_compound_hdr(xdr, req, &hdr);
2327 encode_sequence(xdr, &args->seq_args, &hdr);
2328 encode_putfh(xdr, args->fh, &hdr);
2329 replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2330 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2331
2332 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2333 args->acl_pages, args->acl_pgbase, args->acl_len);
2334 encode_nops(&hdr);
2335 }
2336
2337 /*
2338 * Encode a WRITE request
2339 */
2340 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2341 struct nfs_writeargs *args)
2342 {
2343 struct compound_hdr hdr = {
2344 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2345 };
2346
2347 encode_compound_hdr(xdr, req, &hdr);
2348 encode_sequence(xdr, &args->seq_args, &hdr);
2349 encode_putfh(xdr, args->fh, &hdr);
2350 encode_write(xdr, args, &hdr);
2351 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2352 if (args->bitmask)
2353 encode_getfattr(xdr, args->bitmask, &hdr);
2354 encode_nops(&hdr);
2355 }
2356
2357 /*
2358 * a COMMIT request
2359 */
2360 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2361 struct nfs_writeargs *args)
2362 {
2363 struct compound_hdr hdr = {
2364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365 };
2366
2367 encode_compound_hdr(xdr, req, &hdr);
2368 encode_sequence(xdr, &args->seq_args, &hdr);
2369 encode_putfh(xdr, args->fh, &hdr);
2370 encode_commit(xdr, args, &hdr);
2371 if (args->bitmask)
2372 encode_getfattr(xdr, args->bitmask, &hdr);
2373 encode_nops(&hdr);
2374 }
2375
2376 /*
2377 * FSINFO request
2378 */
2379 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2380 struct nfs4_fsinfo_arg *args)
2381 {
2382 struct compound_hdr hdr = {
2383 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2384 };
2385
2386 encode_compound_hdr(xdr, req, &hdr);
2387 encode_sequence(xdr, &args->seq_args, &hdr);
2388 encode_putfh(xdr, args->fh, &hdr);
2389 encode_fsinfo(xdr, args->bitmask, &hdr);
2390 encode_nops(&hdr);
2391 }
2392
2393 /*
2394 * a PATHCONF request
2395 */
2396 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2397 const struct nfs4_pathconf_arg *args)
2398 {
2399 struct compound_hdr hdr = {
2400 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401 };
2402
2403 encode_compound_hdr(xdr, req, &hdr);
2404 encode_sequence(xdr, &args->seq_args, &hdr);
2405 encode_putfh(xdr, args->fh, &hdr);
2406 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2407 &hdr);
2408 encode_nops(&hdr);
2409 }
2410
2411 /*
2412 * a STATFS request
2413 */
2414 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2415 const struct nfs4_statfs_arg *args)
2416 {
2417 struct compound_hdr hdr = {
2418 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2419 };
2420
2421 encode_compound_hdr(xdr, req, &hdr);
2422 encode_sequence(xdr, &args->seq_args, &hdr);
2423 encode_putfh(xdr, args->fh, &hdr);
2424 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2425 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2426 encode_nops(&hdr);
2427 }
2428
2429 /*
2430 * GETATTR_BITMAP request
2431 */
2432 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2433 struct xdr_stream *xdr,
2434 struct nfs4_server_caps_arg *args)
2435 {
2436 struct compound_hdr hdr = {
2437 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438 };
2439
2440 encode_compound_hdr(xdr, req, &hdr);
2441 encode_sequence(xdr, &args->seq_args, &hdr);
2442 encode_putfh(xdr, args->fhandle, &hdr);
2443 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2444 FATTR4_WORD0_LINK_SUPPORT|
2445 FATTR4_WORD0_SYMLINK_SUPPORT|
2446 FATTR4_WORD0_ACLSUPPORT, &hdr);
2447 encode_nops(&hdr);
2448 }
2449
2450 /*
2451 * a RENEW request
2452 */
2453 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2454 struct nfs_client *clp)
2455 {
2456 struct compound_hdr hdr = {
2457 .nops = 0,
2458 };
2459
2460 encode_compound_hdr(xdr, req, &hdr);
2461 encode_renew(xdr, clp, &hdr);
2462 encode_nops(&hdr);
2463 }
2464
2465 /*
2466 * a SETCLIENTID request
2467 */
2468 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2469 struct xdr_stream *xdr,
2470 struct nfs4_setclientid *sc)
2471 {
2472 struct compound_hdr hdr = {
2473 .nops = 0,
2474 };
2475
2476 encode_compound_hdr(xdr, req, &hdr);
2477 encode_setclientid(xdr, sc, &hdr);
2478 encode_nops(&hdr);
2479 }
2480
2481 /*
2482 * a SETCLIENTID_CONFIRM request
2483 */
2484 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2485 struct xdr_stream *xdr,
2486 struct nfs4_setclientid_res *arg)
2487 {
2488 struct compound_hdr hdr = {
2489 .nops = 0,
2490 };
2491 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2492
2493 encode_compound_hdr(xdr, req, &hdr);
2494 encode_setclientid_confirm(xdr, arg, &hdr);
2495 encode_putrootfh(xdr, &hdr);
2496 encode_fsinfo(xdr, lease_bitmap, &hdr);
2497 encode_nops(&hdr);
2498 }
2499
2500 /*
2501 * DELEGRETURN request
2502 */
2503 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2504 struct xdr_stream *xdr,
2505 const struct nfs4_delegreturnargs *args)
2506 {
2507 struct compound_hdr hdr = {
2508 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2509 };
2510
2511 encode_compound_hdr(xdr, req, &hdr);
2512 encode_sequence(xdr, &args->seq_args, &hdr);
2513 encode_putfh(xdr, args->fhandle, &hdr);
2514 encode_delegreturn(xdr, args->stateid, &hdr);
2515 encode_getfattr(xdr, args->bitmask, &hdr);
2516 encode_nops(&hdr);
2517 }
2518
2519 /*
2520 * Encode FS_LOCATIONS request
2521 */
2522 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2523 struct xdr_stream *xdr,
2524 struct nfs4_fs_locations_arg *args)
2525 {
2526 struct compound_hdr hdr = {
2527 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2528 };
2529 uint32_t replen;
2530
2531 encode_compound_hdr(xdr, req, &hdr);
2532 encode_sequence(xdr, &args->seq_args, &hdr);
2533 encode_putfh(xdr, args->dir_fh, &hdr);
2534 encode_lookup(xdr, args->name, &hdr);
2535 replen = hdr.replen; /* get the attribute into args->page */
2536 encode_fs_locations(xdr, args->bitmask, &hdr);
2537
2538 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2539 0, PAGE_SIZE);
2540 encode_nops(&hdr);
2541 }
2542
2543 /*
2544 * Encode SECINFO request
2545 */
2546 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2547 struct xdr_stream *xdr,
2548 struct nfs4_secinfo_arg *args)
2549 {
2550 struct compound_hdr hdr = {
2551 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2552 };
2553
2554 encode_compound_hdr(xdr, req, &hdr);
2555 encode_sequence(xdr, &args->seq_args, &hdr);
2556 encode_putfh(xdr, args->dir_fh, &hdr);
2557 encode_secinfo(xdr, args->name, &hdr);
2558 encode_nops(&hdr);
2559 }
2560
2561 #if defined(CONFIG_NFS_V4_1)
2562 /*
2563 * EXCHANGE_ID request
2564 */
2565 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2566 struct xdr_stream *xdr,
2567 struct nfs41_exchange_id_args *args)
2568 {
2569 struct compound_hdr hdr = {
2570 .minorversion = args->client->cl_mvops->minor_version,
2571 };
2572
2573 encode_compound_hdr(xdr, req, &hdr);
2574 encode_exchange_id(xdr, args, &hdr);
2575 encode_nops(&hdr);
2576 }
2577
2578 /*
2579 * a CREATE_SESSION request
2580 */
2581 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2582 struct xdr_stream *xdr,
2583 struct nfs41_create_session_args *args)
2584 {
2585 struct compound_hdr hdr = {
2586 .minorversion = args->client->cl_mvops->minor_version,
2587 };
2588
2589 encode_compound_hdr(xdr, req, &hdr);
2590 encode_create_session(xdr, args, &hdr);
2591 encode_nops(&hdr);
2592 }
2593
2594 /*
2595 * a DESTROY_SESSION request
2596 */
2597 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2598 struct xdr_stream *xdr,
2599 struct nfs4_session *session)
2600 {
2601 struct compound_hdr hdr = {
2602 .minorversion = session->clp->cl_mvops->minor_version,
2603 };
2604
2605 encode_compound_hdr(xdr, req, &hdr);
2606 encode_destroy_session(xdr, session, &hdr);
2607 encode_nops(&hdr);
2608 }
2609
2610 /*
2611 * a SEQUENCE request
2612 */
2613 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2614 struct nfs4_sequence_args *args)
2615 {
2616 struct compound_hdr hdr = {
2617 .minorversion = nfs4_xdr_minorversion(args),
2618 };
2619
2620 encode_compound_hdr(xdr, req, &hdr);
2621 encode_sequence(xdr, args, &hdr);
2622 encode_nops(&hdr);
2623 }
2624
2625 /*
2626 * a GET_LEASE_TIME request
2627 */
2628 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2629 struct xdr_stream *xdr,
2630 struct nfs4_get_lease_time_args *args)
2631 {
2632 struct compound_hdr hdr = {
2633 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2634 };
2635 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2636
2637 encode_compound_hdr(xdr, req, &hdr);
2638 encode_sequence(xdr, &args->la_seq_args, &hdr);
2639 encode_putrootfh(xdr, &hdr);
2640 encode_fsinfo(xdr, lease_bitmap, &hdr);
2641 encode_nops(&hdr);
2642 }
2643
2644 /*
2645 * a RECLAIM_COMPLETE request
2646 */
2647 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2648 struct xdr_stream *xdr,
2649 struct nfs41_reclaim_complete_args *args)
2650 {
2651 struct compound_hdr hdr = {
2652 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2653 };
2654
2655 encode_compound_hdr(xdr, req, &hdr);
2656 encode_sequence(xdr, &args->seq_args, &hdr);
2657 encode_reclaim_complete(xdr, args, &hdr);
2658 encode_nops(&hdr);
2659 }
2660
2661 /*
2662 * Encode GETDEVICEINFO request
2663 */
2664 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2665 struct xdr_stream *xdr,
2666 struct nfs4_getdeviceinfo_args *args)
2667 {
2668 struct compound_hdr hdr = {
2669 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2670 };
2671
2672 encode_compound_hdr(xdr, req, &hdr);
2673 encode_sequence(xdr, &args->seq_args, &hdr);
2674 encode_getdeviceinfo(xdr, args, &hdr);
2675
2676 /* set up reply kvec. Subtract notification bitmap max size (2)
2677 * so that notification bitmap is put in xdr_buf tail */
2678 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2679 args->pdev->pages, args->pdev->pgbase,
2680 args->pdev->pglen);
2681
2682 encode_nops(&hdr);
2683 }
2684
2685 /*
2686 * Encode LAYOUTGET request
2687 */
2688 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2689 struct xdr_stream *xdr,
2690 struct nfs4_layoutget_args *args)
2691 {
2692 struct compound_hdr hdr = {
2693 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2694 };
2695
2696 encode_compound_hdr(xdr, req, &hdr);
2697 encode_sequence(xdr, &args->seq_args, &hdr);
2698 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2699 encode_layoutget(xdr, args, &hdr);
2700
2701 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2702 args->layout.pages, 0, args->layout.pglen);
2703
2704 encode_nops(&hdr);
2705 }
2706
2707 /*
2708 * Encode LAYOUTCOMMIT request
2709 */
2710 static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2711 struct xdr_stream *xdr,
2712 struct nfs4_layoutcommit_args *args)
2713 {
2714 struct compound_hdr hdr = {
2715 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2716 };
2717
2718 encode_compound_hdr(xdr, req, &hdr);
2719 encode_sequence(xdr, &args->seq_args, &hdr);
2720 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2721 encode_layoutcommit(xdr, args, &hdr);
2722 encode_getfattr(xdr, args->bitmask, &hdr);
2723 encode_nops(&hdr);
2724 return 0;
2725 }
2726 #endif /* CONFIG_NFS_V4_1 */
2727
2728 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2729 {
2730 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2731 "Remaining buffer length is %tu words.\n",
2732 func, xdr->end - xdr->p);
2733 }
2734
2735 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2736 {
2737 __be32 *p;
2738
2739 p = xdr_inline_decode(xdr, 4);
2740 if (unlikely(!p))
2741 goto out_overflow;
2742 *len = be32_to_cpup(p);
2743 p = xdr_inline_decode(xdr, *len);
2744 if (unlikely(!p))
2745 goto out_overflow;
2746 *string = (char *)p;
2747 return 0;
2748 out_overflow:
2749 print_overflow_msg(__func__, xdr);
2750 return -EIO;
2751 }
2752
2753 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2754 {
2755 __be32 *p;
2756
2757 p = xdr_inline_decode(xdr, 8);
2758 if (unlikely(!p))
2759 goto out_overflow;
2760 hdr->status = be32_to_cpup(p++);
2761 hdr->taglen = be32_to_cpup(p);
2762
2763 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2764 if (unlikely(!p))
2765 goto out_overflow;
2766 hdr->tag = (char *)p;
2767 p += XDR_QUADLEN(hdr->taglen);
2768 hdr->nops = be32_to_cpup(p);
2769 if (unlikely(hdr->nops < 1))
2770 return nfs4_stat_to_errno(hdr->status);
2771 return 0;
2772 out_overflow:
2773 print_overflow_msg(__func__, xdr);
2774 return -EIO;
2775 }
2776
2777 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2778 {
2779 __be32 *p;
2780 uint32_t opnum;
2781 int32_t nfserr;
2782
2783 p = xdr_inline_decode(xdr, 8);
2784 if (unlikely(!p))
2785 goto out_overflow;
2786 opnum = be32_to_cpup(p++);
2787 if (opnum != expected) {
2788 dprintk("nfs: Server returned operation"
2789 " %d but we issued a request for %d\n",
2790 opnum, expected);
2791 return -EIO;
2792 }
2793 nfserr = be32_to_cpup(p);
2794 if (nfserr != NFS_OK)
2795 return nfs4_stat_to_errno(nfserr);
2796 return 0;
2797 out_overflow:
2798 print_overflow_msg(__func__, xdr);
2799 return -EIO;
2800 }
2801
2802 /* Dummy routine */
2803 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2804 {
2805 __be32 *p;
2806 unsigned int strlen;
2807 char *str;
2808
2809 p = xdr_inline_decode(xdr, 12);
2810 if (likely(p))
2811 return decode_opaque_inline(xdr, &strlen, &str);
2812 print_overflow_msg(__func__, xdr);
2813 return -EIO;
2814 }
2815
2816 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2817 {
2818 uint32_t bmlen;
2819 __be32 *p;
2820
2821 p = xdr_inline_decode(xdr, 4);
2822 if (unlikely(!p))
2823 goto out_overflow;
2824 bmlen = be32_to_cpup(p);
2825
2826 bitmap[0] = bitmap[1] = 0;
2827 p = xdr_inline_decode(xdr, (bmlen << 2));
2828 if (unlikely(!p))
2829 goto out_overflow;
2830 if (bmlen > 0) {
2831 bitmap[0] = be32_to_cpup(p++);
2832 if (bmlen > 1)
2833 bitmap[1] = be32_to_cpup(p);
2834 }
2835 return 0;
2836 out_overflow:
2837 print_overflow_msg(__func__, xdr);
2838 return -EIO;
2839 }
2840
2841 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2842 {
2843 __be32 *p;
2844
2845 p = xdr_inline_decode(xdr, 4);
2846 if (unlikely(!p))
2847 goto out_overflow;
2848 *attrlen = be32_to_cpup(p);
2849 *savep = xdr->p;
2850 return 0;
2851 out_overflow:
2852 print_overflow_msg(__func__, xdr);
2853 return -EIO;
2854 }
2855
2856 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2857 {
2858 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2859 int ret;
2860 ret = decode_attr_bitmap(xdr, bitmask);
2861 if (unlikely(ret < 0))
2862 return ret;
2863 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2864 } else
2865 bitmask[0] = bitmask[1] = 0;
2866 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2867 return 0;
2868 }
2869
2870 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2871 {
2872 __be32 *p;
2873 int ret = 0;
2874
2875 *type = 0;
2876 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2877 return -EIO;
2878 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2879 p = xdr_inline_decode(xdr, 4);
2880 if (unlikely(!p))
2881 goto out_overflow;
2882 *type = be32_to_cpup(p);
2883 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2884 dprintk("%s: bad type %d\n", __func__, *type);
2885 return -EIO;
2886 }
2887 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2888 ret = NFS_ATTR_FATTR_TYPE;
2889 }
2890 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2891 return ret;
2892 out_overflow:
2893 print_overflow_msg(__func__, xdr);
2894 return -EIO;
2895 }
2896
2897 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2898 {
2899 __be32 *p;
2900 int ret = 0;
2901
2902 *change = 0;
2903 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2904 return -EIO;
2905 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2906 p = xdr_inline_decode(xdr, 8);
2907 if (unlikely(!p))
2908 goto out_overflow;
2909 xdr_decode_hyper(p, change);
2910 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2911 ret = NFS_ATTR_FATTR_CHANGE;
2912 }
2913 dprintk("%s: change attribute=%Lu\n", __func__,
2914 (unsigned long long)*change);
2915 return ret;
2916 out_overflow:
2917 print_overflow_msg(__func__, xdr);
2918 return -EIO;
2919 }
2920
2921 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2922 {
2923 __be32 *p;
2924 int ret = 0;
2925
2926 *size = 0;
2927 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2928 return -EIO;
2929 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2930 p = xdr_inline_decode(xdr, 8);
2931 if (unlikely(!p))
2932 goto out_overflow;
2933 xdr_decode_hyper(p, size);
2934 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2935 ret = NFS_ATTR_FATTR_SIZE;
2936 }
2937 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2938 return ret;
2939 out_overflow:
2940 print_overflow_msg(__func__, xdr);
2941 return -EIO;
2942 }
2943
2944 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2945 {
2946 __be32 *p;
2947
2948 *res = 0;
2949 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2950 return -EIO;
2951 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2952 p = xdr_inline_decode(xdr, 4);
2953 if (unlikely(!p))
2954 goto out_overflow;
2955 *res = be32_to_cpup(p);
2956 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2957 }
2958 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2959 return 0;
2960 out_overflow:
2961 print_overflow_msg(__func__, xdr);
2962 return -EIO;
2963 }
2964
2965 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2966 {
2967 __be32 *p;
2968
2969 *res = 0;
2970 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2971 return -EIO;
2972 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2973 p = xdr_inline_decode(xdr, 4);
2974 if (unlikely(!p))
2975 goto out_overflow;
2976 *res = be32_to_cpup(p);
2977 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2978 }
2979 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2980 return 0;
2981 out_overflow:
2982 print_overflow_msg(__func__, xdr);
2983 return -EIO;
2984 }
2985
2986 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2987 {
2988 __be32 *p;
2989 int ret = 0;
2990
2991 fsid->major = 0;
2992 fsid->minor = 0;
2993 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2994 return -EIO;
2995 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2996 p = xdr_inline_decode(xdr, 16);
2997 if (unlikely(!p))
2998 goto out_overflow;
2999 p = xdr_decode_hyper(p, &fsid->major);
3000 xdr_decode_hyper(p, &fsid->minor);
3001 bitmap[0] &= ~FATTR4_WORD0_FSID;
3002 ret = NFS_ATTR_FATTR_FSID;
3003 }
3004 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3005 (unsigned long long)fsid->major,
3006 (unsigned long long)fsid->minor);
3007 return ret;
3008 out_overflow:
3009 print_overflow_msg(__func__, xdr);
3010 return -EIO;
3011 }
3012
3013 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3014 {
3015 __be32 *p;
3016
3017 *res = 60;
3018 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3019 return -EIO;
3020 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3021 p = xdr_inline_decode(xdr, 4);
3022 if (unlikely(!p))
3023 goto out_overflow;
3024 *res = be32_to_cpup(p);
3025 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3026 }
3027 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3028 return 0;
3029 out_overflow:
3030 print_overflow_msg(__func__, xdr);
3031 return -EIO;
3032 }
3033
3034 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
3035 {
3036 __be32 *p;
3037
3038 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3039 return -EIO;
3040 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3041 p = xdr_inline_decode(xdr, 4);
3042 if (unlikely(!p))
3043 goto out_overflow;
3044 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3045 return -be32_to_cpup(p);
3046 }
3047 return 0;
3048 out_overflow:
3049 print_overflow_msg(__func__, xdr);
3050 return -EIO;
3051 }
3052
3053 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3054 {
3055 __be32 *p;
3056 int len;
3057
3058 if (fh != NULL)
3059 memset(fh, 0, sizeof(*fh));
3060
3061 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3062 return -EIO;
3063 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3064 p = xdr_inline_decode(xdr, 4);
3065 if (unlikely(!p))
3066 goto out_overflow;
3067 len = be32_to_cpup(p);
3068 if (len > NFS4_FHSIZE)
3069 return -EIO;
3070 p = xdr_inline_decode(xdr, len);
3071 if (unlikely(!p))
3072 goto out_overflow;
3073 if (fh != NULL) {
3074 memcpy(fh->data, p, len);
3075 fh->size = len;
3076 }
3077 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3078 }
3079 return 0;
3080 out_overflow:
3081 print_overflow_msg(__func__, xdr);
3082 return -EIO;
3083 }
3084
3085 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3086 {
3087 __be32 *p;
3088
3089 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3090 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3091 return -EIO;
3092 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3093 p = xdr_inline_decode(xdr, 4);
3094 if (unlikely(!p))
3095 goto out_overflow;
3096 *res = be32_to_cpup(p);
3097 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3098 }
3099 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3100 return 0;
3101 out_overflow:
3102 print_overflow_msg(__func__, xdr);
3103 return -EIO;
3104 }
3105
3106 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3107 {
3108 __be32 *p;
3109 int ret = 0;
3110
3111 *fileid = 0;
3112 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3113 return -EIO;
3114 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3115 p = xdr_inline_decode(xdr, 8);
3116 if (unlikely(!p))
3117 goto out_overflow;
3118 xdr_decode_hyper(p, fileid);
3119 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3120 ret = NFS_ATTR_FATTR_FILEID;
3121 }
3122 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3123 return ret;
3124 out_overflow:
3125 print_overflow_msg(__func__, xdr);
3126 return -EIO;
3127 }
3128
3129 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3130 {
3131 __be32 *p;
3132 int ret = 0;
3133
3134 *fileid = 0;
3135 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3136 return -EIO;
3137 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3138 p = xdr_inline_decode(xdr, 8);
3139 if (unlikely(!p))
3140 goto out_overflow;
3141 xdr_decode_hyper(p, fileid);
3142 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3143 ret = NFS_ATTR_FATTR_FILEID;
3144 }
3145 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3146 return ret;
3147 out_overflow:
3148 print_overflow_msg(__func__, xdr);
3149 return -EIO;
3150 }
3151
3152 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3153 {
3154 __be32 *p;
3155 int status = 0;
3156
3157 *res = 0;
3158 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3159 return -EIO;
3160 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3161 p = xdr_inline_decode(xdr, 8);
3162 if (unlikely(!p))
3163 goto out_overflow;
3164 xdr_decode_hyper(p, res);
3165 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3166 }
3167 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3168 return status;
3169 out_overflow:
3170 print_overflow_msg(__func__, xdr);
3171 return -EIO;
3172 }
3173
3174 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3175 {
3176 __be32 *p;
3177 int status = 0;
3178
3179 *res = 0;
3180 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3181 return -EIO;
3182 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3183 p = xdr_inline_decode(xdr, 8);
3184 if (unlikely(!p))
3185 goto out_overflow;
3186 xdr_decode_hyper(p, res);
3187 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3188 }
3189 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3190 return status;
3191 out_overflow:
3192 print_overflow_msg(__func__, xdr);
3193 return -EIO;
3194 }
3195
3196 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3197 {
3198 __be32 *p;
3199 int status = 0;
3200
3201 *res = 0;
3202 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3203 return -EIO;
3204 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3205 p = xdr_inline_decode(xdr, 8);
3206 if (unlikely(!p))
3207 goto out_overflow;
3208 xdr_decode_hyper(p, res);
3209 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3210 }
3211 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3212 return status;
3213 out_overflow:
3214 print_overflow_msg(__func__, xdr);
3215 return -EIO;
3216 }
3217
3218 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3219 {
3220 u32 n;
3221 __be32 *p;
3222 int status = 0;
3223
3224 p = xdr_inline_decode(xdr, 4);
3225 if (unlikely(!p))
3226 goto out_overflow;
3227 n = be32_to_cpup(p);
3228 if (n == 0)
3229 goto root_path;
3230 dprintk("path ");
3231 path->ncomponents = 0;
3232 while (path->ncomponents < n) {
3233 struct nfs4_string *component = &path->components[path->ncomponents];
3234 status = decode_opaque_inline(xdr, &component->len, &component->data);
3235 if (unlikely(status != 0))
3236 goto out_eio;
3237 if (path->ncomponents != n)
3238 dprintk("/");
3239 dprintk("%s", component->data);
3240 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3241 path->ncomponents++;
3242 else {
3243 dprintk("cannot parse %d components in path\n", n);
3244 goto out_eio;
3245 }
3246 }
3247 out:
3248 dprintk("\n");
3249 return status;
3250 root_path:
3251 /* a root pathname is sent as a zero component4 */
3252 path->ncomponents = 1;
3253 path->components[0].len=0;
3254 path->components[0].data=NULL;
3255 dprintk("path /\n");
3256 goto out;
3257 out_eio:
3258 dprintk(" status %d", status);
3259 status = -EIO;
3260 goto out;
3261 out_overflow:
3262 print_overflow_msg(__func__, xdr);
3263 return -EIO;
3264 }
3265
3266 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3267 {
3268 int n;
3269 __be32 *p;
3270 int status = -EIO;
3271
3272 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3273 goto out;
3274 status = 0;
3275 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3276 goto out;
3277 dprintk("%s: fsroot ", __func__);
3278 status = decode_pathname(xdr, &res->fs_path);
3279 if (unlikely(status != 0))
3280 goto out;
3281 p = xdr_inline_decode(xdr, 4);
3282 if (unlikely(!p))
3283 goto out_overflow;
3284 n = be32_to_cpup(p);
3285 if (n <= 0)
3286 goto out_eio;
3287 res->nlocations = 0;
3288 while (res->nlocations < n) {
3289 u32 m;
3290 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3291
3292 p = xdr_inline_decode(xdr, 4);
3293 if (unlikely(!p))
3294 goto out_overflow;
3295 m = be32_to_cpup(p);
3296
3297 loc->nservers = 0;
3298 dprintk("%s: servers ", __func__);
3299 while (loc->nservers < m) {
3300 struct nfs4_string *server = &loc->servers[loc->nservers];
3301 status = decode_opaque_inline(xdr, &server->len, &server->data);
3302 if (unlikely(status != 0))
3303 goto out_eio;
3304 dprintk("%s ", server->data);
3305 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3306 loc->nservers++;
3307 else {
3308 unsigned int i;
3309 dprintk("%s: using first %u of %u servers "
3310 "returned for location %u\n",
3311 __func__,
3312 NFS4_FS_LOCATION_MAXSERVERS,
3313 m, res->nlocations);
3314 for (i = loc->nservers; i < m; i++) {
3315 unsigned int len;
3316 char *data;
3317 status = decode_opaque_inline(xdr, &len, &data);
3318 if (unlikely(status != 0))
3319 goto out_eio;
3320 }
3321 }
3322 }
3323 status = decode_pathname(xdr, &loc->rootpath);
3324 if (unlikely(status != 0))
3325 goto out_eio;
3326 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3327 res->nlocations++;
3328 }
3329 if (res->nlocations != 0)
3330 status = NFS_ATTR_FATTR_V4_REFERRAL;
3331 out:
3332 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3333 return status;
3334 out_overflow:
3335 print_overflow_msg(__func__, xdr);
3336 out_eio:
3337 status = -EIO;
3338 goto out;
3339 }
3340
3341 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3342 {
3343 __be32 *p;
3344 int status = 0;
3345
3346 *res = 0;
3347 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3348 return -EIO;
3349 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3350 p = xdr_inline_decode(xdr, 8);
3351 if (unlikely(!p))
3352 goto out_overflow;
3353 xdr_decode_hyper(p, res);
3354 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3355 }
3356 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3357 return status;
3358 out_overflow:
3359 print_overflow_msg(__func__, xdr);
3360 return -EIO;
3361 }
3362
3363 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3364 {
3365 __be32 *p;
3366 int status = 0;
3367
3368 *maxlink = 1;
3369 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3370 return -EIO;
3371 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3372 p = xdr_inline_decode(xdr, 4);
3373 if (unlikely(!p))
3374 goto out_overflow;
3375 *maxlink = be32_to_cpup(p);
3376 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3377 }
3378 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3379 return status;
3380 out_overflow:
3381 print_overflow_msg(__func__, xdr);
3382 return -EIO;
3383 }
3384
3385 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3386 {
3387 __be32 *p;
3388 int status = 0;
3389
3390 *maxname = 1024;
3391 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3392 return -EIO;
3393 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3394 p = xdr_inline_decode(xdr, 4);
3395 if (unlikely(!p))
3396 goto out_overflow;
3397 *maxname = be32_to_cpup(p);
3398 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3399 }
3400 dprintk("%s: maxname=%u\n", __func__, *maxname);
3401 return status;
3402 out_overflow:
3403 print_overflow_msg(__func__, xdr);
3404 return -EIO;
3405 }
3406
3407 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3408 {
3409 __be32 *p;
3410 int status = 0;
3411
3412 *res = 1024;
3413 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3414 return -EIO;
3415 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3416 uint64_t maxread;
3417 p = xdr_inline_decode(xdr, 8);
3418 if (unlikely(!p))
3419 goto out_overflow;
3420 xdr_decode_hyper(p, &maxread);
3421 if (maxread > 0x7FFFFFFF)
3422 maxread = 0x7FFFFFFF;
3423 *res = (uint32_t)maxread;
3424 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3425 }
3426 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3427 return status;
3428 out_overflow:
3429 print_overflow_msg(__func__, xdr);
3430 return -EIO;
3431 }
3432
3433 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3434 {
3435 __be32 *p;
3436 int status = 0;
3437
3438 *res = 1024;
3439 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3440 return -EIO;
3441 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3442 uint64_t maxwrite;
3443 p = xdr_inline_decode(xdr, 8);
3444 if (unlikely(!p))
3445 goto out_overflow;
3446 xdr_decode_hyper(p, &maxwrite);
3447 if (maxwrite > 0x7FFFFFFF)
3448 maxwrite = 0x7FFFFFFF;
3449 *res = (uint32_t)maxwrite;
3450 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3451 }
3452 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3453 return status;
3454 out_overflow:
3455 print_overflow_msg(__func__, xdr);
3456 return -EIO;
3457 }
3458
3459 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3460 {
3461 uint32_t tmp;
3462 __be32 *p;
3463 int ret = 0;
3464
3465 *mode = 0;
3466 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3467 return -EIO;
3468 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3469 p = xdr_inline_decode(xdr, 4);
3470 if (unlikely(!p))
3471 goto out_overflow;
3472 tmp = be32_to_cpup(p);
3473 *mode = tmp & ~S_IFMT;
3474 bitmap[1] &= ~FATTR4_WORD1_MODE;
3475 ret = NFS_ATTR_FATTR_MODE;
3476 }
3477 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3478 return ret;
3479 out_overflow:
3480 print_overflow_msg(__func__, xdr);
3481 return -EIO;
3482 }
3483
3484 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3485 {
3486 __be32 *p;
3487 int ret = 0;
3488
3489 *nlink = 1;
3490 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3491 return -EIO;
3492 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3493 p = xdr_inline_decode(xdr, 4);
3494 if (unlikely(!p))
3495 goto out_overflow;
3496 *nlink = be32_to_cpup(p);
3497 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3498 ret = NFS_ATTR_FATTR_NLINK;
3499 }
3500 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3501 return ret;
3502 out_overflow:
3503 print_overflow_msg(__func__, xdr);
3504 return -EIO;
3505 }
3506
3507 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3508 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3509 {
3510 uint32_t len;
3511 __be32 *p;
3512 int ret = 0;
3513
3514 *uid = -2;
3515 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3516 return -EIO;
3517 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3518 p = xdr_inline_decode(xdr, 4);
3519 if (unlikely(!p))
3520 goto out_overflow;
3521 len = be32_to_cpup(p);
3522 p = xdr_inline_decode(xdr, len);
3523 if (unlikely(!p))
3524 goto out_overflow;
3525 if (!may_sleep) {
3526 /* do nothing */
3527 } else if (len < XDR_MAX_NETOBJ) {
3528 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3529 ret = NFS_ATTR_FATTR_OWNER;
3530 else
3531 dprintk("%s: nfs_map_name_to_uid failed!\n",
3532 __func__);
3533 } else
3534 dprintk("%s: name too long (%u)!\n",
3535 __func__, len);
3536 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3537 }
3538 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3539 return ret;
3540 out_overflow:
3541 print_overflow_msg(__func__, xdr);
3542 return -EIO;
3543 }
3544
3545 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3546 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3547 {
3548 uint32_t len;
3549 __be32 *p;
3550 int ret = 0;
3551
3552 *gid = -2;
3553 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3554 return -EIO;
3555 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3556 p = xdr_inline_decode(xdr, 4);
3557 if (unlikely(!p))
3558 goto out_overflow;
3559 len = be32_to_cpup(p);
3560 p = xdr_inline_decode(xdr, len);
3561 if (unlikely(!p))
3562 goto out_overflow;
3563 if (!may_sleep) {
3564 /* do nothing */
3565 } else if (len < XDR_MAX_NETOBJ) {
3566 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3567 ret = NFS_ATTR_FATTR_GROUP;
3568 else
3569 dprintk("%s: nfs_map_group_to_gid failed!\n",
3570 __func__);
3571 } else
3572 dprintk("%s: name too long (%u)!\n",
3573 __func__, len);
3574 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3575 }
3576 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3577 return ret;
3578 out_overflow:
3579 print_overflow_msg(__func__, xdr);
3580 return -EIO;
3581 }
3582
3583 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3584 {
3585 uint32_t major = 0, minor = 0;
3586 __be32 *p;
3587 int ret = 0;
3588
3589 *rdev = MKDEV(0,0);
3590 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3591 return -EIO;
3592 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3593 dev_t tmp;
3594
3595 p = xdr_inline_decode(xdr, 8);
3596 if (unlikely(!p))
3597 goto out_overflow;
3598 major = be32_to_cpup(p++);
3599 minor = be32_to_cpup(p);
3600 tmp = MKDEV(major, minor);
3601 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3602 *rdev = tmp;
3603 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3604 ret = NFS_ATTR_FATTR_RDEV;
3605 }
3606 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3607 return ret;
3608 out_overflow:
3609 print_overflow_msg(__func__, xdr);
3610 return -EIO;
3611 }
3612
3613 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3614 {
3615 __be32 *p;
3616 int status = 0;
3617
3618 *res = 0;
3619 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3620 return -EIO;
3621 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3622 p = xdr_inline_decode(xdr, 8);
3623 if (unlikely(!p))
3624 goto out_overflow;
3625 xdr_decode_hyper(p, res);
3626 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3627 }
3628 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3629 return status;
3630 out_overflow:
3631 print_overflow_msg(__func__, xdr);
3632 return -EIO;
3633 }
3634
3635 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3636 {
3637 __be32 *p;
3638 int status = 0;
3639
3640 *res = 0;
3641 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3642 return -EIO;
3643 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3644 p = xdr_inline_decode(xdr, 8);
3645 if (unlikely(!p))
3646 goto out_overflow;
3647 xdr_decode_hyper(p, res);
3648 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3649 }
3650 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3651 return status;
3652 out_overflow:
3653 print_overflow_msg(__func__, xdr);
3654 return -EIO;
3655 }
3656
3657 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3658 {
3659 __be32 *p;
3660 int status = 0;
3661
3662 *res = 0;
3663 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3664 return -EIO;
3665 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3666 p = xdr_inline_decode(xdr, 8);
3667 if (unlikely(!p))
3668 goto out_overflow;
3669 xdr_decode_hyper(p, res);
3670 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3671 }
3672 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3673 return status;
3674 out_overflow:
3675 print_overflow_msg(__func__, xdr);
3676 return -EIO;
3677 }
3678
3679 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3680 {
3681 __be32 *p;
3682 int ret = 0;
3683
3684 *used = 0;
3685 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3686 return -EIO;
3687 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3688 p = xdr_inline_decode(xdr, 8);
3689 if (unlikely(!p))
3690 goto out_overflow;
3691 xdr_decode_hyper(p, used);
3692 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3693 ret = NFS_ATTR_FATTR_SPACE_USED;
3694 }
3695 dprintk("%s: space used=%Lu\n", __func__,
3696 (unsigned long long)*used);
3697 return ret;
3698 out_overflow:
3699 print_overflow_msg(__func__, xdr);
3700 return -EIO;
3701 }
3702
3703 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3704 {
3705 __be32 *p;
3706 uint64_t sec;
3707 uint32_t nsec;
3708
3709 p = xdr_inline_decode(xdr, 12);
3710 if (unlikely(!p))
3711 goto out_overflow;
3712 p = xdr_decode_hyper(p, &sec);
3713 nsec = be32_to_cpup(p);
3714 time->tv_sec = (time_t)sec;
3715 time->tv_nsec = (long)nsec;
3716 return 0;
3717 out_overflow:
3718 print_overflow_msg(__func__, xdr);
3719 return -EIO;
3720 }
3721
3722 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3723 {
3724 int status = 0;
3725
3726 time->tv_sec = 0;
3727 time->tv_nsec = 0;
3728 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3729 return -EIO;
3730 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3731 status = decode_attr_time(xdr, time);
3732 if (status == 0)
3733 status = NFS_ATTR_FATTR_ATIME;
3734 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3735 }
3736 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3737 return status;
3738 }
3739
3740 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3741 {
3742 int status = 0;
3743
3744 time->tv_sec = 0;
3745 time->tv_nsec = 0;
3746 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3747 return -EIO;
3748 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3749 status = decode_attr_time(xdr, time);
3750 if (status == 0)
3751 status = NFS_ATTR_FATTR_CTIME;
3752 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3753 }
3754 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3755 return status;
3756 }
3757
3758 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3759 struct timespec *time)
3760 {
3761 int status = 0;
3762
3763 time->tv_sec = 0;
3764 time->tv_nsec = 0;
3765 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3766 return -EIO;
3767 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3768 status = decode_attr_time(xdr, time);
3769 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3770 }
3771 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3772 (long)time->tv_nsec);
3773 return status;
3774 }
3775
3776 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3777 {
3778 int status = 0;
3779
3780 time->tv_sec = 0;
3781 time->tv_nsec = 0;
3782 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3783 return -EIO;
3784 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3785 status = decode_attr_time(xdr, time);
3786 if (status == 0)
3787 status = NFS_ATTR_FATTR_MTIME;
3788 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3789 }
3790 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3791 return status;
3792 }
3793
3794 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3795 {
3796 unsigned int attrwords = XDR_QUADLEN(attrlen);
3797 unsigned int nwords = xdr->p - savep;
3798
3799 if (unlikely(attrwords != nwords)) {
3800 dprintk("%s: server returned incorrect attribute length: "
3801 "%u %c %u\n",
3802 __func__,
3803 attrwords << 2,
3804 (attrwords < nwords) ? '<' : '>',
3805 nwords << 2);
3806 return -EIO;
3807 }
3808 return 0;
3809 }
3810
3811 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3812 {
3813 __be32 *p;
3814
3815 p = xdr_inline_decode(xdr, 20);
3816 if (unlikely(!p))
3817 goto out_overflow;
3818 cinfo->atomic = be32_to_cpup(p++);
3819 p = xdr_decode_hyper(p, &cinfo->before);
3820 xdr_decode_hyper(p, &cinfo->after);
3821 return 0;
3822 out_overflow:
3823 print_overflow_msg(__func__, xdr);
3824 return -EIO;
3825 }
3826
3827 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3828 {
3829 __be32 *p;
3830 uint32_t supp, acc;
3831 int status;
3832
3833 status = decode_op_hdr(xdr, OP_ACCESS);
3834 if (status)
3835 return status;
3836 p = xdr_inline_decode(xdr, 8);
3837 if (unlikely(!p))
3838 goto out_overflow;
3839 supp = be32_to_cpup(p++);
3840 acc = be32_to_cpup(p);
3841 access->supported = supp;
3842 access->access = acc;
3843 return 0;
3844 out_overflow:
3845 print_overflow_msg(__func__, xdr);
3846 return -EIO;
3847 }
3848
3849 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3850 {
3851 __be32 *p;
3852
3853 p = xdr_inline_decode(xdr, len);
3854 if (likely(p)) {
3855 memcpy(buf, p, len);
3856 return 0;
3857 }
3858 print_overflow_msg(__func__, xdr);
3859 return -EIO;
3860 }
3861
3862 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3863 {
3864 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3865 }
3866
3867 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3868 {
3869 int status;
3870
3871 status = decode_op_hdr(xdr, OP_CLOSE);
3872 if (status != -EIO)
3873 nfs_increment_open_seqid(status, res->seqid);
3874 if (!status)
3875 status = decode_stateid(xdr, &res->stateid);
3876 return status;
3877 }
3878
3879 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3880 {
3881 return decode_opaque_fixed(xdr, verifier, 8);
3882 }
3883
3884 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3885 {
3886 int status;
3887
3888 status = decode_op_hdr(xdr, OP_COMMIT);
3889 if (!status)
3890 status = decode_verifier(xdr, res->verf->verifier);
3891 return status;
3892 }
3893
3894 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3895 {
3896 __be32 *p;
3897 uint32_t bmlen;
3898 int status;
3899
3900 status = decode_op_hdr(xdr, OP_CREATE);
3901 if (status)
3902 return status;
3903 if ((status = decode_change_info(xdr, cinfo)))
3904 return status;
3905 p = xdr_inline_decode(xdr, 4);
3906 if (unlikely(!p))
3907 goto out_overflow;
3908 bmlen = be32_to_cpup(p);
3909 p = xdr_inline_decode(xdr, bmlen << 2);
3910 if (likely(p))
3911 return 0;
3912 out_overflow:
3913 print_overflow_msg(__func__, xdr);
3914 return -EIO;
3915 }
3916
3917 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3918 {
3919 __be32 *savep;
3920 uint32_t attrlen, bitmap[2] = {0};
3921 int status;
3922
3923 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3924 goto xdr_error;
3925 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3926 goto xdr_error;
3927 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3928 goto xdr_error;
3929 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3930 goto xdr_error;
3931 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3932 goto xdr_error;
3933 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3934 goto xdr_error;
3935 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3936 goto xdr_error;
3937 status = verify_attr_len(xdr, savep, attrlen);
3938 xdr_error:
3939 dprintk("%s: xdr returned %d!\n", __func__, -status);
3940 return status;
3941 }
3942
3943 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3944 {
3945 __be32 *savep;
3946 uint32_t attrlen, bitmap[2] = {0};
3947 int status;
3948
3949 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3950 goto xdr_error;
3951 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3952 goto xdr_error;
3953 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3954 goto xdr_error;
3955
3956 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3957 goto xdr_error;
3958 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3959 goto xdr_error;
3960 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3961 goto xdr_error;
3962 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3963 goto xdr_error;
3964 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3965 goto xdr_error;
3966 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3967 goto xdr_error;
3968
3969 status = verify_attr_len(xdr, savep, attrlen);
3970 xdr_error:
3971 dprintk("%s: xdr returned %d!\n", __func__, -status);
3972 return status;
3973 }
3974
3975 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3976 {
3977 __be32 *savep;
3978 uint32_t attrlen, bitmap[2] = {0};
3979 int status;
3980
3981 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3982 goto xdr_error;
3983 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3984 goto xdr_error;
3985 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3986 goto xdr_error;
3987
3988 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3989 goto xdr_error;
3990 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3991 goto xdr_error;
3992
3993 status = verify_attr_len(xdr, savep, attrlen);
3994 xdr_error:
3995 dprintk("%s: xdr returned %d!\n", __func__, -status);
3996 return status;
3997 }
3998
3999 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4000 struct nfs_fattr *fattr, struct nfs_fh *fh,
4001 const struct nfs_server *server, int may_sleep)
4002 {
4003 int status;
4004 umode_t fmode = 0;
4005 uint64_t fileid;
4006 uint32_t type;
4007
4008 status = decode_attr_type(xdr, bitmap, &type);
4009 if (status < 0)
4010 goto xdr_error;
4011 fattr->mode = 0;
4012 if (status != 0) {
4013 fattr->mode |= nfs_type2fmt[type];
4014 fattr->valid |= status;
4015 }
4016
4017 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4018 if (status < 0)
4019 goto xdr_error;
4020 fattr->valid |= status;
4021
4022 status = decode_attr_size(xdr, bitmap, &fattr->size);
4023 if (status < 0)
4024 goto xdr_error;
4025 fattr->valid |= status;
4026
4027 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4028 if (status < 0)
4029 goto xdr_error;
4030 fattr->valid |= status;
4031
4032 status = decode_attr_error(xdr, bitmap);
4033 if (status == -NFS4ERR_WRONGSEC) {
4034 nfs_fixup_secinfo_attributes(fattr, fh);
4035 status = 0;
4036 }
4037 if (status < 0)
4038 goto xdr_error;
4039
4040 status = decode_attr_filehandle(xdr, bitmap, fh);
4041 if (status < 0)
4042 goto xdr_error;
4043
4044 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4045 if (status < 0)
4046 goto xdr_error;
4047 fattr->valid |= status;
4048
4049 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4050 struct nfs4_fs_locations,
4051 fattr));
4052 if (status < 0)
4053 goto xdr_error;
4054 fattr->valid |= status;
4055
4056 status = decode_attr_mode(xdr, bitmap, &fmode);
4057 if (status < 0)
4058 goto xdr_error;
4059 if (status != 0) {
4060 fattr->mode |= fmode;
4061 fattr->valid |= status;
4062 }
4063
4064 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4065 if (status < 0)
4066 goto xdr_error;
4067 fattr->valid |= status;
4068
4069 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4070 if (status < 0)
4071 goto xdr_error;
4072 fattr->valid |= status;
4073
4074 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4075 if (status < 0)
4076 goto xdr_error;
4077 fattr->valid |= status;
4078
4079 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4080 if (status < 0)
4081 goto xdr_error;
4082 fattr->valid |= status;
4083
4084 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4085 if (status < 0)
4086 goto xdr_error;
4087 fattr->valid |= status;
4088
4089 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4090 if (status < 0)
4091 goto xdr_error;
4092 fattr->valid |= status;
4093
4094 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4095 if (status < 0)
4096 goto xdr_error;
4097 fattr->valid |= status;
4098
4099 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4100 if (status < 0)
4101 goto xdr_error;
4102 fattr->valid |= status;
4103
4104 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
4105 if (status < 0)
4106 goto xdr_error;
4107 if (status != 0 && !(fattr->valid & status)) {
4108 fattr->fileid = fileid;
4109 fattr->valid |= status;
4110 }
4111
4112 xdr_error:
4113 dprintk("%s: xdr returned %d\n", __func__, -status);
4114 return status;
4115 }
4116
4117 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4118 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4119 {
4120 __be32 *savep;
4121 uint32_t attrlen,
4122 bitmap[2] = {0};
4123 int status;
4124
4125 status = decode_op_hdr(xdr, OP_GETATTR);
4126 if (status < 0)
4127 goto xdr_error;
4128
4129 status = decode_attr_bitmap(xdr, bitmap);
4130 if (status < 0)
4131 goto xdr_error;
4132
4133 status = decode_attr_length(xdr, &attrlen, &savep);
4134 if (status < 0)
4135 goto xdr_error;
4136
4137 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4138 if (status < 0)
4139 goto xdr_error;
4140
4141 status = verify_attr_len(xdr, savep, attrlen);
4142 xdr_error:
4143 dprintk("%s: xdr returned %d\n", __func__, -status);
4144 return status;
4145 }
4146
4147 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4148 const struct nfs_server *server, int may_sleep)
4149 {
4150 return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4151 }
4152
4153 /*
4154 * Decode potentially multiple layout types. Currently we only support
4155 * one layout driver per file system.
4156 */
4157 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4158 uint32_t *layouttype)
4159 {
4160 uint32_t *p;
4161 int num;
4162
4163 p = xdr_inline_decode(xdr, 4);
4164 if (unlikely(!p))
4165 goto out_overflow;
4166 num = be32_to_cpup(p);
4167
4168 /* pNFS is not supported by the underlying file system */
4169 if (num == 0) {
4170 *layouttype = 0;
4171 return 0;
4172 }
4173 if (num > 1)
4174 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4175 "per filesystem not supported\n", __func__);
4176
4177 /* Decode and set first layout type, move xdr->p past unused types */
4178 p = xdr_inline_decode(xdr, num * 4);
4179 if (unlikely(!p))
4180 goto out_overflow;
4181 *layouttype = be32_to_cpup(p);
4182 return 0;
4183 out_overflow:
4184 print_overflow_msg(__func__, xdr);
4185 return -EIO;
4186 }
4187
4188 /*
4189 * The type of file system exported.
4190 * Note we must ensure that layouttype is set in any non-error case.
4191 */
4192 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4193 uint32_t *layouttype)
4194 {
4195 int status = 0;
4196
4197 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4198 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4199 return -EIO;
4200 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4201 status = decode_first_pnfs_layout_type(xdr, layouttype);
4202 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4203 } else
4204 *layouttype = 0;
4205 return status;
4206 }
4207
4208 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4209 {
4210 __be32 *savep;
4211 uint32_t attrlen, bitmap[2];
4212 int status;
4213
4214 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4215 goto xdr_error;
4216 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4217 goto xdr_error;
4218 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4219 goto xdr_error;
4220
4221 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4222
4223 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4224 goto xdr_error;
4225 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4226 goto xdr_error;
4227 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4228 goto xdr_error;
4229 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4230 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4231 goto xdr_error;
4232 fsinfo->wtpref = fsinfo->wtmax;
4233 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4234 if (status != 0)
4235 goto xdr_error;
4236 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4237 if (status != 0)
4238 goto xdr_error;
4239
4240 status = verify_attr_len(xdr, savep, attrlen);
4241 xdr_error:
4242 dprintk("%s: xdr returned %d!\n", __func__, -status);
4243 return status;
4244 }
4245
4246 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4247 {
4248 __be32 *p;
4249 uint32_t len;
4250 int status;
4251
4252 /* Zero handle first to allow comparisons */
4253 memset(fh, 0, sizeof(*fh));
4254
4255 status = decode_op_hdr(xdr, OP_GETFH);
4256 if (status)
4257 return status;
4258
4259 p = xdr_inline_decode(xdr, 4);
4260 if (unlikely(!p))
4261 goto out_overflow;
4262 len = be32_to_cpup(p);
4263 if (len > NFS4_FHSIZE)
4264 return -EIO;
4265 fh->size = len;
4266 p = xdr_inline_decode(xdr, len);
4267 if (unlikely(!p))
4268 goto out_overflow;
4269 memcpy(fh->data, p, len);
4270 return 0;
4271 out_overflow:
4272 print_overflow_msg(__func__, xdr);
4273 return -EIO;
4274 }
4275
4276 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4277 {
4278 int status;
4279
4280 status = decode_op_hdr(xdr, OP_LINK);
4281 if (status)
4282 return status;
4283 return decode_change_info(xdr, cinfo);
4284 }
4285
4286 /*
4287 * We create the owner, so we know a proper owner.id length is 4.
4288 */
4289 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4290 {
4291 uint64_t offset, length, clientid;
4292 __be32 *p;
4293 uint32_t namelen, type;
4294
4295 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4296 if (unlikely(!p))
4297 goto out_overflow;
4298 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4299 p = xdr_decode_hyper(p, &length);
4300 type = be32_to_cpup(p++); /* 4 byte read */
4301 if (fl != NULL) { /* manipulate file lock */
4302 fl->fl_start = (loff_t)offset;
4303 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4304 if (length == ~(uint64_t)0)
4305 fl->fl_end = OFFSET_MAX;
4306 fl->fl_type = F_WRLCK;
4307 if (type & 1)
4308 fl->fl_type = F_RDLCK;
4309 fl->fl_pid = 0;
4310 }
4311 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4312 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4313 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4314 if (likely(p))
4315 return -NFS4ERR_DENIED;
4316 out_overflow:
4317 print_overflow_msg(__func__, xdr);
4318 return -EIO;
4319 }
4320
4321 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4322 {
4323 int status;
4324
4325 status = decode_op_hdr(xdr, OP_LOCK);
4326 if (status == -EIO)
4327 goto out;
4328 if (status == 0) {
4329 status = decode_stateid(xdr, &res->stateid);
4330 if (unlikely(status))
4331 goto out;
4332 } else if (status == -NFS4ERR_DENIED)
4333 status = decode_lock_denied(xdr, NULL);
4334 if (res->open_seqid != NULL)
4335 nfs_increment_open_seqid(status, res->open_seqid);
4336 nfs_increment_lock_seqid(status, res->lock_seqid);
4337 out:
4338 return status;
4339 }
4340
4341 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4342 {
4343 int status;
4344 status = decode_op_hdr(xdr, OP_LOCKT);
4345 if (status == -NFS4ERR_DENIED)
4346 return decode_lock_denied(xdr, res->denied);
4347 return status;
4348 }
4349
4350 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4351 {
4352 int status;
4353
4354 status = decode_op_hdr(xdr, OP_LOCKU);
4355 if (status != -EIO)
4356 nfs_increment_lock_seqid(status, res->seqid);
4357 if (status == 0)
4358 status = decode_stateid(xdr, &res->stateid);
4359 return status;
4360 }
4361
4362 static int decode_release_lockowner(struct xdr_stream *xdr)
4363 {
4364 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4365 }
4366
4367 static int decode_lookup(struct xdr_stream *xdr)
4368 {
4369 return decode_op_hdr(xdr, OP_LOOKUP);
4370 }
4371
4372 /* This is too sick! */
4373 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4374 {
4375 __be32 *p;
4376 uint32_t limit_type, nblocks, blocksize;
4377
4378 p = xdr_inline_decode(xdr, 12);
4379 if (unlikely(!p))
4380 goto out_overflow;
4381 limit_type = be32_to_cpup(p++);
4382 switch (limit_type) {
4383 case 1:
4384 xdr_decode_hyper(p, maxsize);
4385 break;
4386 case 2:
4387 nblocks = be32_to_cpup(p++);
4388 blocksize = be32_to_cpup(p);
4389 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4390 }
4391 return 0;
4392 out_overflow:
4393 print_overflow_msg(__func__, xdr);
4394 return -EIO;
4395 }
4396
4397 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4398 {
4399 __be32 *p;
4400 uint32_t delegation_type;
4401 int status;
4402
4403 p = xdr_inline_decode(xdr, 4);
4404 if (unlikely(!p))
4405 goto out_overflow;
4406 delegation_type = be32_to_cpup(p);
4407 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4408 res->delegation_type = 0;
4409 return 0;
4410 }
4411 status = decode_stateid(xdr, &res->delegation);
4412 if (unlikely(status))
4413 return status;
4414 p = xdr_inline_decode(xdr, 4);
4415 if (unlikely(!p))
4416 goto out_overflow;
4417 res->do_recall = be32_to_cpup(p);
4418
4419 switch (delegation_type) {
4420 case NFS4_OPEN_DELEGATE_READ:
4421 res->delegation_type = FMODE_READ;
4422 break;
4423 case NFS4_OPEN_DELEGATE_WRITE:
4424 res->delegation_type = FMODE_WRITE|FMODE_READ;
4425 if (decode_space_limit(xdr, &res->maxsize) < 0)
4426 return -EIO;
4427 }
4428 return decode_ace(xdr, NULL, res->server->nfs_client);
4429 out_overflow:
4430 print_overflow_msg(__func__, xdr);
4431 return -EIO;
4432 }
4433
4434 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4435 {
4436 __be32 *p;
4437 uint32_t savewords, bmlen, i;
4438 int status;
4439
4440 status = decode_op_hdr(xdr, OP_OPEN);
4441 if (status != -EIO)
4442 nfs_increment_open_seqid(status, res->seqid);
4443 if (!status)
4444 status = decode_stateid(xdr, &res->stateid);
4445 if (unlikely(status))
4446 return status;
4447
4448 decode_change_info(xdr, &res->cinfo);
4449
4450 p = xdr_inline_decode(xdr, 8);
4451 if (unlikely(!p))
4452 goto out_overflow;
4453 res->rflags = be32_to_cpup(p++);
4454 bmlen = be32_to_cpup(p);
4455 if (bmlen > 10)
4456 goto xdr_error;
4457
4458 p = xdr_inline_decode(xdr, bmlen << 2);
4459 if (unlikely(!p))
4460 goto out_overflow;
4461 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4462 for (i = 0; i < savewords; ++i)
4463 res->attrset[i] = be32_to_cpup(p++);
4464 for (; i < NFS4_BITMAP_SIZE; i++)
4465 res->attrset[i] = 0;
4466
4467 return decode_delegation(xdr, res);
4468 xdr_error:
4469 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4470 return -EIO;
4471 out_overflow:
4472 print_overflow_msg(__func__, xdr);
4473 return -EIO;
4474 }
4475
4476 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4477 {
4478 int status;
4479
4480 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4481 if (status != -EIO)
4482 nfs_increment_open_seqid(status, res->seqid);
4483 if (!status)
4484 status = decode_stateid(xdr, &res->stateid);
4485 return status;
4486 }
4487
4488 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4489 {
4490 int status;
4491
4492 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4493 if (status != -EIO)
4494 nfs_increment_open_seqid(status, res->seqid);
4495 if (!status)
4496 status = decode_stateid(xdr, &res->stateid);
4497 return status;
4498 }
4499
4500 static int decode_putfh(struct xdr_stream *xdr)
4501 {
4502 return decode_op_hdr(xdr, OP_PUTFH);
4503 }
4504
4505 static int decode_putrootfh(struct xdr_stream *xdr)
4506 {
4507 return decode_op_hdr(xdr, OP_PUTROOTFH);
4508 }
4509
4510 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4511 {
4512 struct kvec *iov = req->rq_rcv_buf.head;
4513 __be32 *p;
4514 uint32_t count, eof, recvd, hdrlen;
4515 int status;
4516
4517 status = decode_op_hdr(xdr, OP_READ);
4518 if (status)
4519 return status;
4520 p = xdr_inline_decode(xdr, 8);
4521 if (unlikely(!p))
4522 goto out_overflow;
4523 eof = be32_to_cpup(p++);
4524 count = be32_to_cpup(p);
4525 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4526 recvd = req->rq_rcv_buf.len - hdrlen;
4527 if (count > recvd) {
4528 dprintk("NFS: server cheating in read reply: "
4529 "count %u > recvd %u\n", count, recvd);
4530 count = recvd;
4531 eof = 0;
4532 }
4533 xdr_read_pages(xdr, count);
4534 res->eof = eof;
4535 res->count = count;
4536 return 0;
4537 out_overflow:
4538 print_overflow_msg(__func__, xdr);
4539 return -EIO;
4540 }
4541
4542 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4543 {
4544 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4545 struct kvec *iov = rcvbuf->head;
4546 size_t hdrlen;
4547 u32 recvd, pglen = rcvbuf->page_len;
4548 int status;
4549
4550 status = decode_op_hdr(xdr, OP_READDIR);
4551 if (!status)
4552 status = decode_verifier(xdr, readdir->verifier.data);
4553 if (unlikely(status))
4554 return status;
4555 dprintk("%s: verifier = %08x:%08x\n",
4556 __func__,
4557 ((u32 *)readdir->verifier.data)[0],
4558 ((u32 *)readdir->verifier.data)[1]);
4559
4560
4561 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4562 recvd = rcvbuf->len - hdrlen;
4563 if (pglen > recvd)
4564 pglen = recvd;
4565 xdr_read_pages(xdr, pglen);
4566
4567
4568 return pglen;
4569 }
4570
4571 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4572 {
4573 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4574 struct kvec *iov = rcvbuf->head;
4575 size_t hdrlen;
4576 u32 len, recvd;
4577 __be32 *p;
4578 int status;
4579
4580 status = decode_op_hdr(xdr, OP_READLINK);
4581 if (status)
4582 return status;
4583
4584 /* Convert length of symlink */
4585 p = xdr_inline_decode(xdr, 4);
4586 if (unlikely(!p))
4587 goto out_overflow;
4588 len = be32_to_cpup(p);
4589 if (len >= rcvbuf->page_len || len <= 0) {
4590 dprintk("nfs: server returned giant symlink!\n");
4591 return -ENAMETOOLONG;
4592 }
4593 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4594 recvd = req->rq_rcv_buf.len - hdrlen;
4595 if (recvd < len) {
4596 dprintk("NFS: server cheating in readlink reply: "
4597 "count %u > recvd %u\n", len, recvd);
4598 return -EIO;
4599 }
4600 xdr_read_pages(xdr, len);
4601 /*
4602 * The XDR encode routine has set things up so that
4603 * the link text will be copied directly into the
4604 * buffer. We just have to do overflow-checking,
4605 * and and null-terminate the text (the VFS expects
4606 * null-termination).
4607 */
4608 xdr_terminate_string(rcvbuf, len);
4609 return 0;
4610 out_overflow:
4611 print_overflow_msg(__func__, xdr);
4612 return -EIO;
4613 }
4614
4615 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4616 {
4617 int status;
4618
4619 status = decode_op_hdr(xdr, OP_REMOVE);
4620 if (status)
4621 goto out;
4622 status = decode_change_info(xdr, cinfo);
4623 out:
4624 return status;
4625 }
4626
4627 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4628 struct nfs4_change_info *new_cinfo)
4629 {
4630 int status;
4631
4632 status = decode_op_hdr(xdr, OP_RENAME);
4633 if (status)
4634 goto out;
4635 if ((status = decode_change_info(xdr, old_cinfo)))
4636 goto out;
4637 status = decode_change_info(xdr, new_cinfo);
4638 out:
4639 return status;
4640 }
4641
4642 static int decode_renew(struct xdr_stream *xdr)
4643 {
4644 return decode_op_hdr(xdr, OP_RENEW);
4645 }
4646
4647 static int
4648 decode_restorefh(struct xdr_stream *xdr)
4649 {
4650 return decode_op_hdr(xdr, OP_RESTOREFH);
4651 }
4652
4653 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4654 size_t *acl_len)
4655 {
4656 __be32 *savep;
4657 uint32_t attrlen,
4658 bitmap[2] = {0};
4659 struct kvec *iov = req->rq_rcv_buf.head;
4660 int status;
4661
4662 *acl_len = 0;
4663 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4664 goto out;
4665 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4666 goto out;
4667 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4668 goto out;
4669
4670 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4671 return -EIO;
4672 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4673 size_t hdrlen;
4674 u32 recvd;
4675
4676 /* We ignore &savep and don't do consistency checks on
4677 * the attr length. Let userspace figure it out.... */
4678 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4679 recvd = req->rq_rcv_buf.len - hdrlen;
4680 if (attrlen > recvd) {
4681 dprintk("NFS: server cheating in getattr"
4682 " acl reply: attrlen %u > recvd %u\n",
4683 attrlen, recvd);
4684 return -EINVAL;
4685 }
4686 xdr_read_pages(xdr, attrlen);
4687 *acl_len = attrlen;
4688 } else
4689 status = -EOPNOTSUPP;
4690
4691 out:
4692 return status;
4693 }
4694
4695 static int
4696 decode_savefh(struct xdr_stream *xdr)
4697 {
4698 return decode_op_hdr(xdr, OP_SAVEFH);
4699 }
4700
4701 static int decode_setattr(struct xdr_stream *xdr)
4702 {
4703 __be32 *p;
4704 uint32_t bmlen;
4705 int status;
4706
4707 status = decode_op_hdr(xdr, OP_SETATTR);
4708 if (status)
4709 return status;
4710 p = xdr_inline_decode(xdr, 4);
4711 if (unlikely(!p))
4712 goto out_overflow;
4713 bmlen = be32_to_cpup(p);
4714 p = xdr_inline_decode(xdr, bmlen << 2);
4715 if (likely(p))
4716 return 0;
4717 out_overflow:
4718 print_overflow_msg(__func__, xdr);
4719 return -EIO;
4720 }
4721
4722 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4723 {
4724 __be32 *p;
4725 uint32_t opnum;
4726 int32_t nfserr;
4727
4728 p = xdr_inline_decode(xdr, 8);
4729 if (unlikely(!p))
4730 goto out_overflow;
4731 opnum = be32_to_cpup(p++);
4732 if (opnum != OP_SETCLIENTID) {
4733 dprintk("nfs: decode_setclientid: Server returned operation"
4734 " %d\n", opnum);
4735 return -EIO;
4736 }
4737 nfserr = be32_to_cpup(p);
4738 if (nfserr == NFS_OK) {
4739 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4740 if (unlikely(!p))
4741 goto out_overflow;
4742 p = xdr_decode_hyper(p, &res->clientid);
4743 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4744 } else if (nfserr == NFSERR_CLID_INUSE) {
4745 uint32_t len;
4746
4747 /* skip netid string */
4748 p = xdr_inline_decode(xdr, 4);
4749 if (unlikely(!p))
4750 goto out_overflow;
4751 len = be32_to_cpup(p);
4752 p = xdr_inline_decode(xdr, len);
4753 if (unlikely(!p))
4754 goto out_overflow;
4755
4756 /* skip uaddr string */
4757 p = xdr_inline_decode(xdr, 4);
4758 if (unlikely(!p))
4759 goto out_overflow;
4760 len = be32_to_cpup(p);
4761 p = xdr_inline_decode(xdr, len);
4762 if (unlikely(!p))
4763 goto out_overflow;
4764 return -NFSERR_CLID_INUSE;
4765 } else
4766 return nfs4_stat_to_errno(nfserr);
4767
4768 return 0;
4769 out_overflow:
4770 print_overflow_msg(__func__, xdr);
4771 return -EIO;
4772 }
4773
4774 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4775 {
4776 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4777 }
4778
4779 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4780 {
4781 __be32 *p;
4782 int status;
4783
4784 status = decode_op_hdr(xdr, OP_WRITE);
4785 if (status)
4786 return status;
4787
4788 p = xdr_inline_decode(xdr, 16);
4789 if (unlikely(!p))
4790 goto out_overflow;
4791 res->count = be32_to_cpup(p++);
4792 res->verf->committed = be32_to_cpup(p++);
4793 memcpy(res->verf->verifier, p, 8);
4794 return 0;
4795 out_overflow:
4796 print_overflow_msg(__func__, xdr);
4797 return -EIO;
4798 }
4799
4800 static int decode_delegreturn(struct xdr_stream *xdr)
4801 {
4802 return decode_op_hdr(xdr, OP_DELEGRETURN);
4803 }
4804
4805 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
4806 {
4807 __be32 *p;
4808
4809 p = xdr_inline_decode(xdr, 4);
4810 if (unlikely(!p))
4811 goto out_overflow;
4812 flavor->gss.sec_oid4.len = be32_to_cpup(p);
4813 if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
4814 goto out_err;
4815
4816 p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
4817 if (unlikely(!p))
4818 goto out_overflow;
4819 memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
4820
4821 p = xdr_inline_decode(xdr, 8);
4822 if (unlikely(!p))
4823 goto out_overflow;
4824 flavor->gss.qop4 = be32_to_cpup(p++);
4825 flavor->gss.service = be32_to_cpup(p);
4826
4827 return 0;
4828
4829 out_overflow:
4830 print_overflow_msg(__func__, xdr);
4831 return -EIO;
4832 out_err:
4833 return -EINVAL;
4834 }
4835
4836 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
4837 {
4838 struct nfs4_secinfo_flavor *sec_flavor;
4839 int status;
4840 __be32 *p;
4841 int i;
4842
4843 status = decode_op_hdr(xdr, OP_SECINFO);
4844 p = xdr_inline_decode(xdr, 4);
4845 if (unlikely(!p))
4846 goto out_overflow;
4847 res->flavors->num_flavors = be32_to_cpup(p);
4848
4849 for (i = 0; i < res->flavors->num_flavors; i++) {
4850 sec_flavor = &res->flavors->flavors[i];
4851 if ((char *)&sec_flavor[1] - (char *)res > PAGE_SIZE)
4852 break;
4853
4854 p = xdr_inline_decode(xdr, 4);
4855 if (unlikely(!p))
4856 goto out_overflow;
4857 sec_flavor->flavor = be32_to_cpup(p);
4858
4859 if (sec_flavor->flavor == RPC_AUTH_GSS) {
4860 if (decode_secinfo_gss(xdr, sec_flavor))
4861 break;
4862 }
4863 }
4864
4865 return 0;
4866
4867 out_overflow:
4868 print_overflow_msg(__func__, xdr);
4869 return -EIO;
4870 }
4871
4872 #if defined(CONFIG_NFS_V4_1)
4873 static int decode_exchange_id(struct xdr_stream *xdr,
4874 struct nfs41_exchange_id_res *res)
4875 {
4876 __be32 *p;
4877 uint32_t dummy;
4878 char *dummy_str;
4879 int status;
4880 struct nfs_client *clp = res->client;
4881
4882 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4883 if (status)
4884 return status;
4885
4886 p = xdr_inline_decode(xdr, 8);
4887 if (unlikely(!p))
4888 goto out_overflow;
4889 xdr_decode_hyper(p, &clp->cl_clientid);
4890 p = xdr_inline_decode(xdr, 12);
4891 if (unlikely(!p))
4892 goto out_overflow;
4893 clp->cl_seqid = be32_to_cpup(p++);
4894 clp->cl_exchange_flags = be32_to_cpup(p++);
4895
4896 /* We ask for SP4_NONE */
4897 dummy = be32_to_cpup(p);
4898 if (dummy != SP4_NONE)
4899 return -EIO;
4900
4901 /* Throw away minor_id */
4902 p = xdr_inline_decode(xdr, 8);
4903 if (unlikely(!p))
4904 goto out_overflow;
4905
4906 /* Throw away Major id */
4907 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4908 if (unlikely(status))
4909 return status;
4910
4911 /* Throw away server_scope */
4912 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4913 if (unlikely(status))
4914 return status;
4915
4916 /* Throw away Implementation id array */
4917 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4918 if (unlikely(status))
4919 return status;
4920
4921 return 0;
4922 out_overflow:
4923 print_overflow_msg(__func__, xdr);
4924 return -EIO;
4925 }
4926
4927 static int decode_chan_attrs(struct xdr_stream *xdr,
4928 struct nfs4_channel_attrs *attrs)
4929 {
4930 __be32 *p;
4931 u32 nr_attrs;
4932
4933 p = xdr_inline_decode(xdr, 28);
4934 if (unlikely(!p))
4935 goto out_overflow;
4936 attrs->headerpadsz = be32_to_cpup(p++);
4937 attrs->max_rqst_sz = be32_to_cpup(p++);
4938 attrs->max_resp_sz = be32_to_cpup(p++);
4939 attrs->max_resp_sz_cached = be32_to_cpup(p++);
4940 attrs->max_ops = be32_to_cpup(p++);
4941 attrs->max_reqs = be32_to_cpup(p++);
4942 nr_attrs = be32_to_cpup(p);
4943 if (unlikely(nr_attrs > 1)) {
4944 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4945 __func__, nr_attrs);
4946 return -EINVAL;
4947 }
4948 if (nr_attrs == 1) {
4949 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4950 if (unlikely(!p))
4951 goto out_overflow;
4952 }
4953 return 0;
4954 out_overflow:
4955 print_overflow_msg(__func__, xdr);
4956 return -EIO;
4957 }
4958
4959 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4960 {
4961 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4962 }
4963
4964 static int decode_create_session(struct xdr_stream *xdr,
4965 struct nfs41_create_session_res *res)
4966 {
4967 __be32 *p;
4968 int status;
4969 struct nfs_client *clp = res->client;
4970 struct nfs4_session *session = clp->cl_session;
4971
4972 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4973 if (!status)
4974 status = decode_sessionid(xdr, &session->sess_id);
4975 if (unlikely(status))
4976 return status;
4977
4978 /* seqid, flags */
4979 p = xdr_inline_decode(xdr, 8);
4980 if (unlikely(!p))
4981 goto out_overflow;
4982 clp->cl_seqid = be32_to_cpup(p++);
4983 session->flags = be32_to_cpup(p);
4984
4985 /* Channel attributes */
4986 status = decode_chan_attrs(xdr, &session->fc_attrs);
4987 if (!status)
4988 status = decode_chan_attrs(xdr, &session->bc_attrs);
4989 return status;
4990 out_overflow:
4991 print_overflow_msg(__func__, xdr);
4992 return -EIO;
4993 }
4994
4995 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4996 {
4997 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4998 }
4999
5000 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5001 {
5002 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5003 }
5004 #endif /* CONFIG_NFS_V4_1 */
5005
5006 static int decode_sequence(struct xdr_stream *xdr,
5007 struct nfs4_sequence_res *res,
5008 struct rpc_rqst *rqstp)
5009 {
5010 #if defined(CONFIG_NFS_V4_1)
5011 struct nfs4_sessionid id;
5012 u32 dummy;
5013 int status;
5014 __be32 *p;
5015
5016 if (!res->sr_session)
5017 return 0;
5018
5019 status = decode_op_hdr(xdr, OP_SEQUENCE);
5020 if (!status)
5021 status = decode_sessionid(xdr, &id);
5022 if (unlikely(status))
5023 goto out_err;
5024
5025 /*
5026 * If the server returns different values for sessionID, slotID or
5027 * sequence number, the server is looney tunes.
5028 */
5029 status = -EREMOTEIO;
5030
5031 if (memcmp(id.data, res->sr_session->sess_id.data,
5032 NFS4_MAX_SESSIONID_LEN)) {
5033 dprintk("%s Invalid session id\n", __func__);
5034 goto out_err;
5035 }
5036
5037 p = xdr_inline_decode(xdr, 20);
5038 if (unlikely(!p))
5039 goto out_overflow;
5040
5041 /* seqid */
5042 dummy = be32_to_cpup(p++);
5043 if (dummy != res->sr_slot->seq_nr) {
5044 dprintk("%s Invalid sequence number\n", __func__);
5045 goto out_err;
5046 }
5047 /* slot id */
5048 dummy = be32_to_cpup(p++);
5049 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5050 dprintk("%s Invalid slot id\n", __func__);
5051 goto out_err;
5052 }
5053 /* highest slot id - currently not processed */
5054 dummy = be32_to_cpup(p++);
5055 /* target highest slot id - currently not processed */
5056 dummy = be32_to_cpup(p++);
5057 /* result flags */
5058 res->sr_status_flags = be32_to_cpup(p);
5059 status = 0;
5060 out_err:
5061 res->sr_status = status;
5062 return status;
5063 out_overflow:
5064 print_overflow_msg(__func__, xdr);
5065 status = -EIO;
5066 goto out_err;
5067 #else /* CONFIG_NFS_V4_1 */
5068 return 0;
5069 #endif /* CONFIG_NFS_V4_1 */
5070 }
5071
5072 #if defined(CONFIG_NFS_V4_1)
5073
5074 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5075 struct pnfs_device *pdev)
5076 {
5077 __be32 *p;
5078 uint32_t len, type;
5079 int status;
5080
5081 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5082 if (status) {
5083 if (status == -ETOOSMALL) {
5084 p = xdr_inline_decode(xdr, 4);
5085 if (unlikely(!p))
5086 goto out_overflow;
5087 pdev->mincount = be32_to_cpup(p);
5088 dprintk("%s: Min count too small. mincnt = %u\n",
5089 __func__, pdev->mincount);
5090 }
5091 return status;
5092 }
5093
5094 p = xdr_inline_decode(xdr, 8);
5095 if (unlikely(!p))
5096 goto out_overflow;
5097 type = be32_to_cpup(p++);
5098 if (type != pdev->layout_type) {
5099 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5100 __func__, pdev->layout_type, type);
5101 return -EINVAL;
5102 }
5103 /*
5104 * Get the length of the opaque device_addr4. xdr_read_pages places
5105 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5106 * and places the remaining xdr data in xdr_buf->tail
5107 */
5108 pdev->mincount = be32_to_cpup(p);
5109 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5110
5111 /* Parse notification bitmap, verifying that it is zero. */
5112 p = xdr_inline_decode(xdr, 4);
5113 if (unlikely(!p))
5114 goto out_overflow;
5115 len = be32_to_cpup(p);
5116 if (len) {
5117 uint32_t i;
5118
5119 p = xdr_inline_decode(xdr, 4 * len);
5120 if (unlikely(!p))
5121 goto out_overflow;
5122 for (i = 0; i < len; i++, p++) {
5123 if (be32_to_cpup(p)) {
5124 dprintk("%s: notifications not supported\n",
5125 __func__);
5126 return -EIO;
5127 }
5128 }
5129 }
5130 return 0;
5131 out_overflow:
5132 print_overflow_msg(__func__, xdr);
5133 return -EIO;
5134 }
5135
5136 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5137 struct nfs4_layoutget_res *res)
5138 {
5139 __be32 *p;
5140 int status;
5141 u32 layout_count;
5142 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5143 struct kvec *iov = rcvbuf->head;
5144 u32 hdrlen, recvd;
5145
5146 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5147 if (status)
5148 return status;
5149 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5150 if (unlikely(!p))
5151 goto out_overflow;
5152 res->return_on_close = be32_to_cpup(p++);
5153 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5154 layout_count = be32_to_cpup(p);
5155 if (!layout_count) {
5156 dprintk("%s: server responded with empty layout array\n",
5157 __func__);
5158 return -EINVAL;
5159 }
5160
5161 p = xdr_inline_decode(xdr, 28);
5162 if (unlikely(!p))
5163 goto out_overflow;
5164 p = xdr_decode_hyper(p, &res->range.offset);
5165 p = xdr_decode_hyper(p, &res->range.length);
5166 res->range.iomode = be32_to_cpup(p++);
5167 res->type = be32_to_cpup(p++);
5168 res->layoutp->len = be32_to_cpup(p);
5169
5170 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5171 __func__,
5172 (unsigned long)res->range.offset,
5173 (unsigned long)res->range.length,
5174 res->range.iomode,
5175 res->type,
5176 res->layoutp->len);
5177
5178 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5179 recvd = req->rq_rcv_buf.len - hdrlen;
5180 if (res->layoutp->len > recvd) {
5181 dprintk("NFS: server cheating in layoutget reply: "
5182 "layout len %u > recvd %u\n",
5183 res->layoutp->len, recvd);
5184 return -EINVAL;
5185 }
5186
5187 xdr_read_pages(xdr, res->layoutp->len);
5188
5189 if (layout_count > 1) {
5190 /* We only handle a length one array at the moment. Any
5191 * further entries are just ignored. Note that this means
5192 * the client may see a response that is less than the
5193 * minimum it requested.
5194 */
5195 dprintk("%s: server responded with %d layouts, dropping tail\n",
5196 __func__, layout_count);
5197 }
5198
5199 return 0;
5200 out_overflow:
5201 print_overflow_msg(__func__, xdr);
5202 return -EIO;
5203 }
5204
5205 static int decode_layoutcommit(struct xdr_stream *xdr,
5206 struct rpc_rqst *req,
5207 struct nfs4_layoutcommit_res *res)
5208 {
5209 __be32 *p;
5210 __u32 sizechanged;
5211 int status;
5212
5213 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5214 if (status)
5215 return status;
5216
5217 p = xdr_inline_decode(xdr, 4);
5218 if (unlikely(!p))
5219 goto out_overflow;
5220 sizechanged = be32_to_cpup(p);
5221
5222 if (sizechanged) {
5223 /* throw away new size */
5224 p = xdr_inline_decode(xdr, 8);
5225 if (unlikely(!p))
5226 goto out_overflow;
5227 }
5228 return 0;
5229 out_overflow:
5230 print_overflow_msg(__func__, xdr);
5231 return -EIO;
5232 }
5233 #endif /* CONFIG_NFS_V4_1 */
5234
5235 /*
5236 * END OF "GENERIC" DECODE ROUTINES.
5237 */
5238
5239 /*
5240 * Decode OPEN_DOWNGRADE response
5241 */
5242 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5243 struct xdr_stream *xdr,
5244 struct nfs_closeres *res)
5245 {
5246 struct compound_hdr hdr;
5247 int status;
5248
5249 status = decode_compound_hdr(xdr, &hdr);
5250 if (status)
5251 goto out;
5252 status = decode_sequence(xdr, &res->seq_res, rqstp);
5253 if (status)
5254 goto out;
5255 status = decode_putfh(xdr);
5256 if (status)
5257 goto out;
5258 status = decode_open_downgrade(xdr, res);
5259 if (status != 0)
5260 goto out;
5261 decode_getfattr(xdr, res->fattr, res->server,
5262 !RPC_IS_ASYNC(rqstp->rq_task));
5263 out:
5264 return status;
5265 }
5266
5267 /*
5268 * Decode ACCESS response
5269 */
5270 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5271 struct nfs4_accessres *res)
5272 {
5273 struct compound_hdr hdr;
5274 int status;
5275
5276 status = decode_compound_hdr(xdr, &hdr);
5277 if (status)
5278 goto out;
5279 status = decode_sequence(xdr, &res->seq_res, rqstp);
5280 if (status)
5281 goto out;
5282 status = decode_putfh(xdr);
5283 if (status != 0)
5284 goto out;
5285 status = decode_access(xdr, res);
5286 if (status != 0)
5287 goto out;
5288 decode_getfattr(xdr, res->fattr, res->server,
5289 !RPC_IS_ASYNC(rqstp->rq_task));
5290 out:
5291 return status;
5292 }
5293
5294 /*
5295 * Decode LOOKUP response
5296 */
5297 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5298 struct nfs4_lookup_res *res)
5299 {
5300 struct compound_hdr hdr;
5301 int status;
5302
5303 status = decode_compound_hdr(xdr, &hdr);
5304 if (status)
5305 goto out;
5306 status = decode_sequence(xdr, &res->seq_res, rqstp);
5307 if (status)
5308 goto out;
5309 status = decode_putfh(xdr);
5310 if (status)
5311 goto out;
5312 status = decode_lookup(xdr);
5313 if (status)
5314 goto out;
5315 status = decode_getfh(xdr, res->fh);
5316 if (status)
5317 goto out;
5318 status = decode_getfattr(xdr, res->fattr, res->server
5319 ,!RPC_IS_ASYNC(rqstp->rq_task));
5320 out:
5321 return status;
5322 }
5323
5324 /*
5325 * Decode LOOKUP_ROOT response
5326 */
5327 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5328 struct xdr_stream *xdr,
5329 struct nfs4_lookup_res *res)
5330 {
5331 struct compound_hdr hdr;
5332 int status;
5333
5334 status = decode_compound_hdr(xdr, &hdr);
5335 if (status)
5336 goto out;
5337 status = decode_sequence(xdr, &res->seq_res, rqstp);
5338 if (status)
5339 goto out;
5340 status = decode_putrootfh(xdr);
5341 if (status)
5342 goto out;
5343 status = decode_getfh(xdr, res->fh);
5344 if (status == 0)
5345 status = decode_getfattr(xdr, res->fattr, res->server,
5346 !RPC_IS_ASYNC(rqstp->rq_task));
5347 out:
5348 return status;
5349 }
5350
5351 /*
5352 * Decode REMOVE response
5353 */
5354 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5355 struct nfs_removeres *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_remove(xdr, &res->cinfo);
5370 if (status)
5371 goto out;
5372 decode_getfattr(xdr, res->dir_attr, res->server,
5373 !RPC_IS_ASYNC(rqstp->rq_task));
5374 out:
5375 return status;
5376 }
5377
5378 /*
5379 * Decode RENAME response
5380 */
5381 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5382 struct nfs_renameres *res)
5383 {
5384 struct compound_hdr hdr;
5385 int status;
5386
5387 status = decode_compound_hdr(xdr, &hdr);
5388 if (status)
5389 goto out;
5390 status = decode_sequence(xdr, &res->seq_res, rqstp);
5391 if (status)
5392 goto out;
5393 status = decode_putfh(xdr);
5394 if (status)
5395 goto out;
5396 status = decode_savefh(xdr);
5397 if (status)
5398 goto out;
5399 status = decode_putfh(xdr);
5400 if (status)
5401 goto out;
5402 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5403 if (status)
5404 goto out;
5405 /* Current FH is target directory */
5406 if (decode_getfattr(xdr, res->new_fattr, res->server,
5407 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5408 goto out;
5409 status = decode_restorefh(xdr);
5410 if (status)
5411 goto out;
5412 decode_getfattr(xdr, res->old_fattr, res->server,
5413 !RPC_IS_ASYNC(rqstp->rq_task));
5414 out:
5415 return status;
5416 }
5417
5418 /*
5419 * Decode LINK response
5420 */
5421 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5422 struct nfs4_link_res *res)
5423 {
5424 struct compound_hdr hdr;
5425 int status;
5426
5427 status = decode_compound_hdr(xdr, &hdr);
5428 if (status)
5429 goto out;
5430 status = decode_sequence(xdr, &res->seq_res, rqstp);
5431 if (status)
5432 goto out;
5433 status = decode_putfh(xdr);
5434 if (status)
5435 goto out;
5436 status = decode_savefh(xdr);
5437 if (status)
5438 goto out;
5439 status = decode_putfh(xdr);
5440 if (status)
5441 goto out;
5442 status = decode_link(xdr, &res->cinfo);
5443 if (status)
5444 goto out;
5445 /*
5446 * Note order: OP_LINK leaves the directory as the current
5447 * filehandle.
5448 */
5449 if (decode_getfattr(xdr, res->dir_attr, res->server,
5450 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5451 goto out;
5452 status = decode_restorefh(xdr);
5453 if (status)
5454 goto out;
5455 decode_getfattr(xdr, res->fattr, res->server,
5456 !RPC_IS_ASYNC(rqstp->rq_task));
5457 out:
5458 return status;
5459 }
5460
5461 /*
5462 * Decode CREATE response
5463 */
5464 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5465 struct nfs4_create_res *res)
5466 {
5467 struct compound_hdr hdr;
5468 int status;
5469
5470 status = decode_compound_hdr(xdr, &hdr);
5471 if (status)
5472 goto out;
5473 status = decode_sequence(xdr, &res->seq_res, rqstp);
5474 if (status)
5475 goto out;
5476 status = decode_putfh(xdr);
5477 if (status)
5478 goto out;
5479 status = decode_savefh(xdr);
5480 if (status)
5481 goto out;
5482 status = decode_create(xdr, &res->dir_cinfo);
5483 if (status)
5484 goto out;
5485 status = decode_getfh(xdr, res->fh);
5486 if (status)
5487 goto out;
5488 if (decode_getfattr(xdr, res->fattr, res->server,
5489 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5490 goto out;
5491 status = decode_restorefh(xdr);
5492 if (status)
5493 goto out;
5494 decode_getfattr(xdr, res->dir_fattr, res->server,
5495 !RPC_IS_ASYNC(rqstp->rq_task));
5496 out:
5497 return status;
5498 }
5499
5500 /*
5501 * Decode SYMLINK response
5502 */
5503 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5504 struct nfs4_create_res *res)
5505 {
5506 return nfs4_xdr_dec_create(rqstp, xdr, res);
5507 }
5508
5509 /*
5510 * Decode GETATTR response
5511 */
5512 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5513 struct nfs4_getattr_res *res)
5514 {
5515 struct compound_hdr hdr;
5516 int status;
5517
5518 status = decode_compound_hdr(xdr, &hdr);
5519 if (status)
5520 goto out;
5521 status = decode_sequence(xdr, &res->seq_res, rqstp);
5522 if (status)
5523 goto out;
5524 status = decode_putfh(xdr);
5525 if (status)
5526 goto out;
5527 status = decode_getfattr(xdr, res->fattr, res->server,
5528 !RPC_IS_ASYNC(rqstp->rq_task));
5529 out:
5530 return status;
5531 }
5532
5533 /*
5534 * Encode an SETACL request
5535 */
5536 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5537 struct nfs_setaclargs *args)
5538 {
5539 struct compound_hdr hdr = {
5540 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5541 };
5542
5543 encode_compound_hdr(xdr, req, &hdr);
5544 encode_sequence(xdr, &args->seq_args, &hdr);
5545 encode_putfh(xdr, args->fh, &hdr);
5546 encode_setacl(xdr, args, &hdr);
5547 encode_nops(&hdr);
5548 }
5549
5550 /*
5551 * Decode SETACL response
5552 */
5553 static int
5554 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5555 struct nfs_setaclres *res)
5556 {
5557 struct compound_hdr hdr;
5558 int status;
5559
5560 status = decode_compound_hdr(xdr, &hdr);
5561 if (status)
5562 goto out;
5563 status = decode_sequence(xdr, &res->seq_res, rqstp);
5564 if (status)
5565 goto out;
5566 status = decode_putfh(xdr);
5567 if (status)
5568 goto out;
5569 status = decode_setattr(xdr);
5570 out:
5571 return status;
5572 }
5573
5574 /*
5575 * Decode GETACL response
5576 */
5577 static int
5578 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5579 struct nfs_getaclres *res)
5580 {
5581 struct compound_hdr hdr;
5582 int status;
5583
5584 status = decode_compound_hdr(xdr, &hdr);
5585 if (status)
5586 goto out;
5587 status = decode_sequence(xdr, &res->seq_res, rqstp);
5588 if (status)
5589 goto out;
5590 status = decode_putfh(xdr);
5591 if (status)
5592 goto out;
5593 status = decode_getacl(xdr, rqstp, &res->acl_len);
5594
5595 out:
5596 return status;
5597 }
5598
5599 /*
5600 * Decode CLOSE response
5601 */
5602 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5603 struct nfs_closeres *res)
5604 {
5605 struct compound_hdr hdr;
5606 int status;
5607
5608 status = decode_compound_hdr(xdr, &hdr);
5609 if (status)
5610 goto out;
5611 status = decode_sequence(xdr, &res->seq_res, rqstp);
5612 if (status)
5613 goto out;
5614 status = decode_putfh(xdr);
5615 if (status)
5616 goto out;
5617 status = decode_close(xdr, res);
5618 if (status != 0)
5619 goto out;
5620 /*
5621 * Note: Server may do delete on close for this file
5622 * in which case the getattr call will fail with
5623 * an ESTALE error. Shouldn't be a problem,
5624 * though, since fattr->valid will remain unset.
5625 */
5626 decode_getfattr(xdr, res->fattr, res->server,
5627 !RPC_IS_ASYNC(rqstp->rq_task));
5628 out:
5629 return status;
5630 }
5631
5632 /*
5633 * Decode OPEN response
5634 */
5635 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5636 struct nfs_openres *res)
5637 {
5638 struct compound_hdr hdr;
5639 int status;
5640
5641 status = decode_compound_hdr(xdr, &hdr);
5642 if (status)
5643 goto out;
5644 status = decode_sequence(xdr, &res->seq_res, rqstp);
5645 if (status)
5646 goto out;
5647 status = decode_putfh(xdr);
5648 if (status)
5649 goto out;
5650 status = decode_savefh(xdr);
5651 if (status)
5652 goto out;
5653 status = decode_open(xdr, res);
5654 if (status)
5655 goto out;
5656 if (decode_getfh(xdr, &res->fh) != 0)
5657 goto out;
5658 if (decode_getfattr(xdr, res->f_attr, res->server,
5659 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5660 goto out;
5661 if (decode_restorefh(xdr) != 0)
5662 goto out;
5663 decode_getfattr(xdr, res->dir_attr, res->server,
5664 !RPC_IS_ASYNC(rqstp->rq_task));
5665 out:
5666 return status;
5667 }
5668
5669 /*
5670 * Decode OPEN_CONFIRM response
5671 */
5672 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5673 struct xdr_stream *xdr,
5674 struct nfs_open_confirmres *res)
5675 {
5676 struct compound_hdr hdr;
5677 int status;
5678
5679 status = decode_compound_hdr(xdr, &hdr);
5680 if (status)
5681 goto out;
5682 status = decode_putfh(xdr);
5683 if (status)
5684 goto out;
5685 status = decode_open_confirm(xdr, res);
5686 out:
5687 return status;
5688 }
5689
5690 /*
5691 * Decode OPEN response
5692 */
5693 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5694 struct xdr_stream *xdr,
5695 struct nfs_openres *res)
5696 {
5697 struct compound_hdr hdr;
5698 int status;
5699
5700 status = decode_compound_hdr(xdr, &hdr);
5701 if (status)
5702 goto out;
5703 status = decode_sequence(xdr, &res->seq_res, rqstp);
5704 if (status)
5705 goto out;
5706 status = decode_putfh(xdr);
5707 if (status)
5708 goto out;
5709 status = decode_open(xdr, res);
5710 if (status)
5711 goto out;
5712 decode_getfattr(xdr, res->f_attr, res->server,
5713 !RPC_IS_ASYNC(rqstp->rq_task));
5714 out:
5715 return status;
5716 }
5717
5718 /*
5719 * Decode SETATTR response
5720 */
5721 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5722 struct xdr_stream *xdr,
5723 struct nfs_setattrres *res)
5724 {
5725 struct compound_hdr hdr;
5726 int status;
5727
5728 status = decode_compound_hdr(xdr, &hdr);
5729 if (status)
5730 goto out;
5731 status = decode_sequence(xdr, &res->seq_res, rqstp);
5732 if (status)
5733 goto out;
5734 status = decode_putfh(xdr);
5735 if (status)
5736 goto out;
5737 status = decode_setattr(xdr);
5738 if (status)
5739 goto out;
5740 decode_getfattr(xdr, res->fattr, res->server,
5741 !RPC_IS_ASYNC(rqstp->rq_task));
5742 out:
5743 return status;
5744 }
5745
5746 /*
5747 * Decode LOCK response
5748 */
5749 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5750 struct nfs_lock_res *res)
5751 {
5752 struct compound_hdr hdr;
5753 int status;
5754
5755 status = decode_compound_hdr(xdr, &hdr);
5756 if (status)
5757 goto out;
5758 status = decode_sequence(xdr, &res->seq_res, rqstp);
5759 if (status)
5760 goto out;
5761 status = decode_putfh(xdr);
5762 if (status)
5763 goto out;
5764 status = decode_lock(xdr, res);
5765 out:
5766 return status;
5767 }
5768
5769 /*
5770 * Decode LOCKT response
5771 */
5772 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5773 struct nfs_lockt_res *res)
5774 {
5775 struct compound_hdr hdr;
5776 int status;
5777
5778 status = decode_compound_hdr(xdr, &hdr);
5779 if (status)
5780 goto out;
5781 status = decode_sequence(xdr, &res->seq_res, rqstp);
5782 if (status)
5783 goto out;
5784 status = decode_putfh(xdr);
5785 if (status)
5786 goto out;
5787 status = decode_lockt(xdr, res);
5788 out:
5789 return status;
5790 }
5791
5792 /*
5793 * Decode LOCKU response
5794 */
5795 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5796 struct nfs_locku_res *res)
5797 {
5798 struct compound_hdr hdr;
5799 int status;
5800
5801 status = decode_compound_hdr(xdr, &hdr);
5802 if (status)
5803 goto out;
5804 status = decode_sequence(xdr, &res->seq_res, rqstp);
5805 if (status)
5806 goto out;
5807 status = decode_putfh(xdr);
5808 if (status)
5809 goto out;
5810 status = decode_locku(xdr, res);
5811 out:
5812 return status;
5813 }
5814
5815 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5816 struct xdr_stream *xdr, void *dummy)
5817 {
5818 struct compound_hdr hdr;
5819 int status;
5820
5821 status = decode_compound_hdr(xdr, &hdr);
5822 if (!status)
5823 status = decode_release_lockowner(xdr);
5824 return status;
5825 }
5826
5827 /*
5828 * Decode READLINK response
5829 */
5830 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5831 struct xdr_stream *xdr,
5832 struct nfs4_readlink_res *res)
5833 {
5834 struct compound_hdr hdr;
5835 int status;
5836
5837 status = decode_compound_hdr(xdr, &hdr);
5838 if (status)
5839 goto out;
5840 status = decode_sequence(xdr, &res->seq_res, rqstp);
5841 if (status)
5842 goto out;
5843 status = decode_putfh(xdr);
5844 if (status)
5845 goto out;
5846 status = decode_readlink(xdr, rqstp);
5847 out:
5848 return status;
5849 }
5850
5851 /*
5852 * Decode READDIR response
5853 */
5854 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5855 struct nfs4_readdir_res *res)
5856 {
5857 struct compound_hdr hdr;
5858 int status;
5859
5860 status = decode_compound_hdr(xdr, &hdr);
5861 if (status)
5862 goto out;
5863 status = decode_sequence(xdr, &res->seq_res, rqstp);
5864 if (status)
5865 goto out;
5866 status = decode_putfh(xdr);
5867 if (status)
5868 goto out;
5869 status = decode_readdir(xdr, rqstp, res);
5870 out:
5871 return status;
5872 }
5873
5874 /*
5875 * Decode Read response
5876 */
5877 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5878 struct nfs_readres *res)
5879 {
5880 struct compound_hdr hdr;
5881 int status;
5882
5883 status = decode_compound_hdr(xdr, &hdr);
5884 if (status)
5885 goto out;
5886 status = decode_sequence(xdr, &res->seq_res, rqstp);
5887 if (status)
5888 goto out;
5889 status = decode_putfh(xdr);
5890 if (status)
5891 goto out;
5892 status = decode_read(xdr, rqstp, res);
5893 if (!status)
5894 status = res->count;
5895 out:
5896 return status;
5897 }
5898
5899 /*
5900 * Decode WRITE response
5901 */
5902 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5903 struct nfs_writeres *res)
5904 {
5905 struct compound_hdr hdr;
5906 int status;
5907
5908 status = decode_compound_hdr(xdr, &hdr);
5909 if (status)
5910 goto out;
5911 status = decode_sequence(xdr, &res->seq_res, rqstp);
5912 if (status)
5913 goto out;
5914 status = decode_putfh(xdr);
5915 if (status)
5916 goto out;
5917 status = decode_write(xdr, res);
5918 if (status)
5919 goto out;
5920 if (res->fattr)
5921 decode_getfattr(xdr, res->fattr, res->server,
5922 !RPC_IS_ASYNC(rqstp->rq_task));
5923 if (!status)
5924 status = res->count;
5925 out:
5926 return status;
5927 }
5928
5929 /*
5930 * Decode COMMIT response
5931 */
5932 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5933 struct nfs_writeres *res)
5934 {
5935 struct compound_hdr hdr;
5936 int status;
5937
5938 status = decode_compound_hdr(xdr, &hdr);
5939 if (status)
5940 goto out;
5941 status = decode_sequence(xdr, &res->seq_res, rqstp);
5942 if (status)
5943 goto out;
5944 status = decode_putfh(xdr);
5945 if (status)
5946 goto out;
5947 status = decode_commit(xdr, res);
5948 if (status)
5949 goto out;
5950 if (res->fattr)
5951 decode_getfattr(xdr, res->fattr, res->server,
5952 !RPC_IS_ASYNC(rqstp->rq_task));
5953 out:
5954 return status;
5955 }
5956
5957 /*
5958 * Decode FSINFO response
5959 */
5960 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5961 struct nfs4_fsinfo_res *res)
5962 {
5963 struct compound_hdr hdr;
5964 int status;
5965
5966 status = decode_compound_hdr(xdr, &hdr);
5967 if (!status)
5968 status = decode_sequence(xdr, &res->seq_res, req);
5969 if (!status)
5970 status = decode_putfh(xdr);
5971 if (!status)
5972 status = decode_fsinfo(xdr, res->fsinfo);
5973 return status;
5974 }
5975
5976 /*
5977 * Decode PATHCONF response
5978 */
5979 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5980 struct nfs4_pathconf_res *res)
5981 {
5982 struct compound_hdr hdr;
5983 int status;
5984
5985 status = decode_compound_hdr(xdr, &hdr);
5986 if (!status)
5987 status = decode_sequence(xdr, &res->seq_res, req);
5988 if (!status)
5989 status = decode_putfh(xdr);
5990 if (!status)
5991 status = decode_pathconf(xdr, res->pathconf);
5992 return status;
5993 }
5994
5995 /*
5996 * Decode STATFS response
5997 */
5998 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5999 struct nfs4_statfs_res *res)
6000 {
6001 struct compound_hdr hdr;
6002 int status;
6003
6004 status = decode_compound_hdr(xdr, &hdr);
6005 if (!status)
6006 status = decode_sequence(xdr, &res->seq_res, req);
6007 if (!status)
6008 status = decode_putfh(xdr);
6009 if (!status)
6010 status = decode_statfs(xdr, res->fsstat);
6011 return status;
6012 }
6013
6014 /*
6015 * Decode GETATTR_BITMAP response
6016 */
6017 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6018 struct xdr_stream *xdr,
6019 struct nfs4_server_caps_res *res)
6020 {
6021 struct compound_hdr hdr;
6022 int status;
6023
6024 status = decode_compound_hdr(xdr, &hdr);
6025 if (status)
6026 goto out;
6027 status = decode_sequence(xdr, &res->seq_res, req);
6028 if (status)
6029 goto out;
6030 status = decode_putfh(xdr);
6031 if (status)
6032 goto out;
6033 status = decode_server_caps(xdr, res);
6034 out:
6035 return status;
6036 }
6037
6038 /*
6039 * Decode RENEW response
6040 */
6041 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6042 void *__unused)
6043 {
6044 struct compound_hdr hdr;
6045 int status;
6046
6047 status = decode_compound_hdr(xdr, &hdr);
6048 if (!status)
6049 status = decode_renew(xdr);
6050 return status;
6051 }
6052
6053 /*
6054 * Decode SETCLIENTID response
6055 */
6056 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6057 struct xdr_stream *xdr,
6058 struct nfs4_setclientid_res *res)
6059 {
6060 struct compound_hdr hdr;
6061 int status;
6062
6063 status = decode_compound_hdr(xdr, &hdr);
6064 if (!status)
6065 status = decode_setclientid(xdr, res);
6066 return status;
6067 }
6068
6069 /*
6070 * Decode SETCLIENTID_CONFIRM response
6071 */
6072 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6073 struct xdr_stream *xdr,
6074 struct nfs_fsinfo *fsinfo)
6075 {
6076 struct compound_hdr hdr;
6077 int status;
6078
6079 status = decode_compound_hdr(xdr, &hdr);
6080 if (!status)
6081 status = decode_setclientid_confirm(xdr);
6082 if (!status)
6083 status = decode_putrootfh(xdr);
6084 if (!status)
6085 status = decode_fsinfo(xdr, fsinfo);
6086 return status;
6087 }
6088
6089 /*
6090 * Decode DELEGRETURN response
6091 */
6092 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6093 struct xdr_stream *xdr,
6094 struct nfs4_delegreturnres *res)
6095 {
6096 struct compound_hdr hdr;
6097 int status;
6098
6099 status = decode_compound_hdr(xdr, &hdr);
6100 if (status)
6101 goto out;
6102 status = decode_sequence(xdr, &res->seq_res, rqstp);
6103 if (status)
6104 goto out;
6105 status = decode_putfh(xdr);
6106 if (status != 0)
6107 goto out;
6108 status = decode_delegreturn(xdr);
6109 if (status != 0)
6110 goto out;
6111 decode_getfattr(xdr, res->fattr, res->server,
6112 !RPC_IS_ASYNC(rqstp->rq_task));
6113 out:
6114 return status;
6115 }
6116
6117 /*
6118 * Decode FS_LOCATIONS response
6119 */
6120 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6121 struct xdr_stream *xdr,
6122 struct nfs4_fs_locations_res *res)
6123 {
6124 struct compound_hdr hdr;
6125 int status;
6126
6127 status = decode_compound_hdr(xdr, &hdr);
6128 if (status)
6129 goto out;
6130 status = decode_sequence(xdr, &res->seq_res, req);
6131 if (status)
6132 goto out;
6133 status = decode_putfh(xdr);
6134 if (status)
6135 goto out;
6136 status = decode_lookup(xdr);
6137 if (status)
6138 goto out;
6139 xdr_enter_page(xdr, PAGE_SIZE);
6140 status = decode_getfattr(xdr, &res->fs_locations->fattr,
6141 res->fs_locations->server,
6142 !RPC_IS_ASYNC(req->rq_task));
6143 out:
6144 return status;
6145 }
6146
6147 /*
6148 * Decode SECINFO response
6149 */
6150 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6151 struct xdr_stream *xdr,
6152 struct nfs4_secinfo_res *res)
6153 {
6154 struct compound_hdr hdr;
6155 int status;
6156
6157 status = decode_compound_hdr(xdr, &hdr);
6158 if (status)
6159 goto out;
6160 status = decode_sequence(xdr, &res->seq_res, rqstp);
6161 if (status)
6162 goto out;
6163 status = decode_putfh(xdr);
6164 if (status)
6165 goto out;
6166 status = decode_secinfo(xdr, res);
6167 if (status)
6168 goto out;
6169 out:
6170 return status;
6171 }
6172
6173 #if defined(CONFIG_NFS_V4_1)
6174 /*
6175 * Decode EXCHANGE_ID response
6176 */
6177 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6178 struct xdr_stream *xdr,
6179 void *res)
6180 {
6181 struct compound_hdr hdr;
6182 int status;
6183
6184 status = decode_compound_hdr(xdr, &hdr);
6185 if (!status)
6186 status = decode_exchange_id(xdr, res);
6187 return status;
6188 }
6189
6190 /*
6191 * Decode CREATE_SESSION response
6192 */
6193 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6194 struct xdr_stream *xdr,
6195 struct nfs41_create_session_res *res)
6196 {
6197 struct compound_hdr hdr;
6198 int status;
6199
6200 status = decode_compound_hdr(xdr, &hdr);
6201 if (!status)
6202 status = decode_create_session(xdr, res);
6203 return status;
6204 }
6205
6206 /*
6207 * Decode DESTROY_SESSION response
6208 */
6209 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6210 struct xdr_stream *xdr,
6211 void *res)
6212 {
6213 struct compound_hdr hdr;
6214 int status;
6215
6216 status = decode_compound_hdr(xdr, &hdr);
6217 if (!status)
6218 status = decode_destroy_session(xdr, res);
6219 return status;
6220 }
6221
6222 /*
6223 * Decode SEQUENCE response
6224 */
6225 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6226 struct xdr_stream *xdr,
6227 struct nfs4_sequence_res *res)
6228 {
6229 struct compound_hdr hdr;
6230 int status;
6231
6232 status = decode_compound_hdr(xdr, &hdr);
6233 if (!status)
6234 status = decode_sequence(xdr, res, rqstp);
6235 return status;
6236 }
6237
6238 /*
6239 * Decode GET_LEASE_TIME response
6240 */
6241 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6242 struct xdr_stream *xdr,
6243 struct nfs4_get_lease_time_res *res)
6244 {
6245 struct compound_hdr hdr;
6246 int status;
6247
6248 status = decode_compound_hdr(xdr, &hdr);
6249 if (!status)
6250 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6251 if (!status)
6252 status = decode_putrootfh(xdr);
6253 if (!status)
6254 status = decode_fsinfo(xdr, res->lr_fsinfo);
6255 return status;
6256 }
6257
6258 /*
6259 * Decode RECLAIM_COMPLETE response
6260 */
6261 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6262 struct xdr_stream *xdr,
6263 struct nfs41_reclaim_complete_res *res)
6264 {
6265 struct compound_hdr hdr;
6266 int status;
6267
6268 status = decode_compound_hdr(xdr, &hdr);
6269 if (!status)
6270 status = decode_sequence(xdr, &res->seq_res, rqstp);
6271 if (!status)
6272 status = decode_reclaim_complete(xdr, (void *)NULL);
6273 return status;
6274 }
6275
6276 /*
6277 * Decode GETDEVINFO response
6278 */
6279 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6280 struct xdr_stream *xdr,
6281 struct nfs4_getdeviceinfo_res *res)
6282 {
6283 struct compound_hdr hdr;
6284 int status;
6285
6286 status = decode_compound_hdr(xdr, &hdr);
6287 if (status != 0)
6288 goto out;
6289 status = decode_sequence(xdr, &res->seq_res, rqstp);
6290 if (status != 0)
6291 goto out;
6292 status = decode_getdeviceinfo(xdr, res->pdev);
6293 out:
6294 return status;
6295 }
6296
6297 /*
6298 * Decode LAYOUTGET response
6299 */
6300 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6301 struct xdr_stream *xdr,
6302 struct nfs4_layoutget_res *res)
6303 {
6304 struct compound_hdr hdr;
6305 int status;
6306
6307 status = decode_compound_hdr(xdr, &hdr);
6308 if (status)
6309 goto out;
6310 status = decode_sequence(xdr, &res->seq_res, rqstp);
6311 if (status)
6312 goto out;
6313 status = decode_putfh(xdr);
6314 if (status)
6315 goto out;
6316 status = decode_layoutget(xdr, rqstp, res);
6317 out:
6318 return status;
6319 }
6320
6321 /*
6322 * Decode LAYOUTCOMMIT response
6323 */
6324 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6325 struct xdr_stream *xdr,
6326 struct nfs4_layoutcommit_res *res)
6327 {
6328 struct compound_hdr hdr;
6329 int status;
6330
6331 status = decode_compound_hdr(xdr, &hdr);
6332 if (status)
6333 goto out;
6334 status = decode_sequence(xdr, &res->seq_res, rqstp);
6335 if (status)
6336 goto out;
6337 status = decode_putfh(xdr);
6338 if (status)
6339 goto out;
6340 status = decode_layoutcommit(xdr, rqstp, res);
6341 if (status)
6342 goto out;
6343 decode_getfattr(xdr, res->fattr, res->server,
6344 !RPC_IS_ASYNC(rqstp->rq_task));
6345 out:
6346 return status;
6347 }
6348 #endif /* CONFIG_NFS_V4_1 */
6349
6350 /**
6351 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6352 * the local page cache.
6353 * @xdr: XDR stream where entry resides
6354 * @entry: buffer to fill in with entry data
6355 * @plus: boolean indicating whether this should be a readdirplus entry
6356 *
6357 * Returns zero if successful, otherwise a negative errno value is
6358 * returned.
6359 *
6360 * This function is not invoked during READDIR reply decoding, but
6361 * rather whenever an application invokes the getdents(2) system call
6362 * on a directory already in our cache.
6363 */
6364 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6365 int plus)
6366 {
6367 uint32_t bitmap[2] = {0};
6368 uint32_t len;
6369 __be32 *p = xdr_inline_decode(xdr, 4);
6370 if (unlikely(!p))
6371 goto out_overflow;
6372 if (*p == xdr_zero) {
6373 p = xdr_inline_decode(xdr, 4);
6374 if (unlikely(!p))
6375 goto out_overflow;
6376 if (*p == xdr_zero)
6377 return -EAGAIN;
6378 entry->eof = 1;
6379 return -EBADCOOKIE;
6380 }
6381
6382 p = xdr_inline_decode(xdr, 12);
6383 if (unlikely(!p))
6384 goto out_overflow;
6385 entry->prev_cookie = entry->cookie;
6386 p = xdr_decode_hyper(p, &entry->cookie);
6387 entry->len = be32_to_cpup(p);
6388
6389 p = xdr_inline_decode(xdr, entry->len);
6390 if (unlikely(!p))
6391 goto out_overflow;
6392 entry->name = (const char *) p;
6393
6394 /*
6395 * In case the server doesn't return an inode number,
6396 * we fake one here. (We don't use inode number 0,
6397 * since glibc seems to choke on it...)
6398 */
6399 entry->ino = 1;
6400 entry->fattr->valid = 0;
6401
6402 if (decode_attr_bitmap(xdr, bitmap) < 0)
6403 goto out_overflow;
6404
6405 if (decode_attr_length(xdr, &len, &p) < 0)
6406 goto out_overflow;
6407
6408 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6409 entry->server, 1) < 0)
6410 goto out_overflow;
6411 if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6412 entry->ino = entry->fattr->fileid;
6413
6414 entry->d_type = DT_UNKNOWN;
6415 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6416 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6417
6418 return 0;
6419
6420 out_overflow:
6421 print_overflow_msg(__func__, xdr);
6422 return -EAGAIN;
6423 }
6424
6425 /*
6426 * We need to translate between nfs status return values and
6427 * the local errno values which may not be the same.
6428 */
6429 static struct {
6430 int stat;
6431 int errno;
6432 } nfs_errtbl[] = {
6433 { NFS4_OK, 0 },
6434 { NFS4ERR_PERM, -EPERM },
6435 { NFS4ERR_NOENT, -ENOENT },
6436 { NFS4ERR_IO, -errno_NFSERR_IO},
6437 { NFS4ERR_NXIO, -ENXIO },
6438 { NFS4ERR_ACCESS, -EACCES },
6439 { NFS4ERR_EXIST, -EEXIST },
6440 { NFS4ERR_XDEV, -EXDEV },
6441 { NFS4ERR_NOTDIR, -ENOTDIR },
6442 { NFS4ERR_ISDIR, -EISDIR },
6443 { NFS4ERR_INVAL, -EINVAL },
6444 { NFS4ERR_FBIG, -EFBIG },
6445 { NFS4ERR_NOSPC, -ENOSPC },
6446 { NFS4ERR_ROFS, -EROFS },
6447 { NFS4ERR_MLINK, -EMLINK },
6448 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
6449 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
6450 { NFS4ERR_DQUOT, -EDQUOT },
6451 { NFS4ERR_STALE, -ESTALE },
6452 { NFS4ERR_BADHANDLE, -EBADHANDLE },
6453 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
6454 { NFS4ERR_NOTSUPP, -ENOTSUPP },
6455 { NFS4ERR_TOOSMALL, -ETOOSMALL },
6456 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
6457 { NFS4ERR_BADTYPE, -EBADTYPE },
6458 { NFS4ERR_LOCKED, -EAGAIN },
6459 { NFS4ERR_SYMLINK, -ELOOP },
6460 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
6461 { NFS4ERR_DEADLOCK, -EDEADLK },
6462 { -1, -EIO }
6463 };
6464
6465 /*
6466 * Convert an NFS error code to a local one.
6467 * This one is used jointly by NFSv2 and NFSv3.
6468 */
6469 static int
6470 nfs4_stat_to_errno(int stat)
6471 {
6472 int i;
6473 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6474 if (nfs_errtbl[i].stat == stat)
6475 return nfs_errtbl[i].errno;
6476 }
6477 if (stat <= 10000 || stat > 10100) {
6478 /* The server is looney tunes. */
6479 return -EREMOTEIO;
6480 }
6481 /* If we cannot translate the error, the recovery routines should
6482 * handle it.
6483 * Note: remaining NFSv4 error codes have values > 10000, so should
6484 * not conflict with native Linux error codes.
6485 */
6486 return -stat;
6487 }
6488
6489 #define PROC(proc, argtype, restype) \
6490 [NFSPROC4_CLNT_##proc] = { \
6491 .p_proc = NFSPROC4_COMPOUND, \
6492 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
6493 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
6494 .p_arglen = NFS4_##argtype##_sz, \
6495 .p_replen = NFS4_##restype##_sz, \
6496 .p_statidx = NFSPROC4_CLNT_##proc, \
6497 .p_name = #proc, \
6498 }
6499
6500 struct rpc_procinfo nfs4_procedures[] = {
6501 PROC(READ, enc_read, dec_read),
6502 PROC(WRITE, enc_write, dec_write),
6503 PROC(COMMIT, enc_commit, dec_commit),
6504 PROC(OPEN, enc_open, dec_open),
6505 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
6506 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
6507 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
6508 PROC(CLOSE, enc_close, dec_close),
6509 PROC(SETATTR, enc_setattr, dec_setattr),
6510 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
6511 PROC(RENEW, enc_renew, dec_renew),
6512 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
6513 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6514 PROC(LOCK, enc_lock, dec_lock),
6515 PROC(LOCKT, enc_lockt, dec_lockt),
6516 PROC(LOCKU, enc_locku, dec_locku),
6517 PROC(ACCESS, enc_access, dec_access),
6518 PROC(GETATTR, enc_getattr, dec_getattr),
6519 PROC(LOOKUP, enc_lookup, dec_lookup),
6520 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
6521 PROC(REMOVE, enc_remove, dec_remove),
6522 PROC(RENAME, enc_rename, dec_rename),
6523 PROC(LINK, enc_link, dec_link),
6524 PROC(SYMLINK, enc_symlink, dec_symlink),
6525 PROC(CREATE, enc_create, dec_create),
6526 PROC(PATHCONF, enc_pathconf, dec_pathconf),
6527 PROC(STATFS, enc_statfs, dec_statfs),
6528 PROC(READLINK, enc_readlink, dec_readlink),
6529 PROC(READDIR, enc_readdir, dec_readdir),
6530 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
6531 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
6532 PROC(GETACL, enc_getacl, dec_getacl),
6533 PROC(SETACL, enc_setacl, dec_setacl),
6534 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
6535 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
6536 PROC(SECINFO, enc_secinfo, dec_secinfo),
6537 #if defined(CONFIG_NFS_V4_1)
6538 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
6539 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
6540 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
6541 PROC(SEQUENCE, enc_sequence, dec_sequence),
6542 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
6543 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
6544 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
6545 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
6546 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
6547 #endif /* CONFIG_NFS_V4_1 */
6548 };
6549
6550 struct rpc_version nfs_version4 = {
6551 .number = 4,
6552 .nrprocs = ARRAY_SIZE(nfs4_procedures),
6553 .procs = nfs4_procedures
6554 };
6555
6556 /*
6557 * Local variables:
6558 * c-basic-offset: 8
6559 * End:
6560 */
linux-next