20b4e30e6c828e5e0aed77ea01c445a52caab0ee
[safe/jmp/linux-2.6] / fs / nfs / nfs4xdr.c
1 /*
2  *  fs/nfs/nfs4xdr.c
3  *
4  *  Client-side XDR for NFSv4.
5  *
6  *  Copyright (c) 2002 The Regents of the University of Michigan.
7  *  All rights reserved.
8  *
9  *  Kendrick Smith <kmsmith@umich.edu>
10  *  Andy Adamson   <andros@umich.edu>
11  *
12  *  Redistribution and use in source and binary forms, with or without
13  *  modification, are permitted provided that the following conditions
14  *  are met:
15  *
16  *  1. Redistributions of source code must retain the above copyright
17  *     notice, this list of conditions and the following disclaimer.
18  *  2. Redistributions in binary form must reproduce the above copyright
19  *     notice, this list of conditions and the following disclaimer in the
20  *     documentation and/or other materials provided with the distribution.
21  *  3. Neither the name of the University nor the names of its
22  *     contributors may be used to endorse or promote products derived
23  *     from this software without specific prior written permission.
24  *
25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/slab.h>
42 #include <linux/errno.h>
43 #include <linux/string.h>
44 #include <linux/in.h>
45 #include <linux/pagemap.h>
46 #include <linux/proc_fs.h>
47 #include <linux/kdev_t.h>
48 #include <linux/sunrpc/clnt.h>
49 #include <linux/nfs.h>
50 #include <linux/nfs4.h>
51 #include <linux/nfs_fs.h>
52 #include <linux/nfs_idmap.h>
53 #include "nfs4_fs.h"
54
55 #define NFSDBG_FACILITY         NFSDBG_XDR
56
57 /* Mapping from NFS error code to "errno" error code. */
58 #define errno_NFSERR_IO         EIO
59
60 static int nfs4_stat_to_errno(int);
61
62 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
63 #ifdef DEBUG
64 #define NFS4_MAXTAGLEN          20
65 #else
66 #define NFS4_MAXTAGLEN          0
67 #endif
68
69 /* lock,open owner id:
70  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
71  */
72 #define open_owner_id_maxsz     (1 + 4)
73 #define lock_owner_id_maxsz     (1 + 4)
74 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
75 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
76 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
77 #define op_encode_hdr_maxsz     (1)
78 #define op_decode_hdr_maxsz     (2)
79 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
80 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
81 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
82 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
83 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
84                                 (NFS4_FHSIZE >> 2))
85 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
86 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
87 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
88 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
89 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
90                                 ((3+NFS4_FHSIZE) >> 2))
91 #define nfs4_fattr_bitmap_maxsz 3
92 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
93 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
94 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
95 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
96 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
97 /* This is based on getfattr, which uses the most attributes: */
98 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
99                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
100 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
101                                 nfs4_fattr_value_maxsz)
102 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
103 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
104                                  1 + 2 + 1 + \
105                                 nfs4_owner_maxsz + \
106                                 nfs4_group_maxsz + \
107                                 4 + 4)
108 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
109 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
110 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
111 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
112 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
113 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
114 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
115 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
116 #define encode_setclientid_maxsz \
117                                 (op_encode_hdr_maxsz + \
118                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
119                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
120                                 1 /* sc_prog */ + \
121                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
122                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
123                                 1) /* sc_cb_ident */
124 #define decode_setclientid_maxsz \
125                                 (op_decode_hdr_maxsz + \
126                                 2 + \
127                                 1024) /* large value for CLID_INUSE */
128 #define encode_setclientid_confirm_maxsz \
129                                 (op_encode_hdr_maxsz + \
130                                 3 + (NFS4_VERIFIER_SIZE >> 2))
131 #define decode_setclientid_confirm_maxsz \
132                                 (op_decode_hdr_maxsz)
133 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
134 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
135 #define encode_share_access_maxsz \
136                                 (2)
137 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
138 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
139 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
140 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
141                                 2 + encode_share_access_maxsz + 2 + \
142                                 open_owner_id_maxsz + \
143                                 encode_opentype_maxsz + \
144                                 encode_claim_null_maxsz)
145 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
146 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
147                                 decode_ace_maxsz)
148 #define decode_change_info_maxsz        (5)
149 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
150                                 decode_stateid_maxsz + \
151                                 decode_change_info_maxsz + 1 + \
152                                 nfs4_fattr_bitmap_maxsz + \
153                                 decode_delegation_maxsz)
154 #define encode_open_confirm_maxsz \
155                                 (op_encode_hdr_maxsz + \
156                                  encode_stateid_maxsz + 1)
157 #define decode_open_confirm_maxsz \
158                                 (op_decode_hdr_maxsz + \
159                                  decode_stateid_maxsz)
160 #define encode_open_downgrade_maxsz \
161                                 (op_encode_hdr_maxsz + \
162                                  encode_stateid_maxsz + 1 + \
163                                  encode_share_access_maxsz)
164 #define decode_open_downgrade_maxsz \
165                                 (op_decode_hdr_maxsz + \
166                                  decode_stateid_maxsz)
167 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
168                                  1 + encode_stateid_maxsz)
169 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
170                                  decode_stateid_maxsz)
171 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
172                                  encode_stateid_maxsz + \
173                                  encode_attrs_maxsz)
174 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
175                                  nfs4_fattr_bitmap_maxsz)
176 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
177                                  encode_stateid_maxsz + 3)
178 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
179 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
180                                  2 + encode_verifier_maxsz + 5)
181 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
182                                  decode_verifier_maxsz)
183 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
184 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
185 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
186                                  encode_stateid_maxsz + 4)
187 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
188                                  2 + decode_verifier_maxsz)
189 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
190 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
191                                  decode_verifier_maxsz)
192 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
193                                 nfs4_name_maxsz)
194 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
195                                  decode_change_info_maxsz)
196 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
197                                 2 * nfs4_name_maxsz)
198 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
199                                  decode_change_info_maxsz + \
200                                  decode_change_info_maxsz)
201 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
202                                 nfs4_name_maxsz)
203 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
204 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
205                                  7 + \
206                                  1 + encode_stateid_maxsz + 8)
207 #define decode_lock_denied_maxsz \
208                                 (8 + decode_lockowner_maxsz)
209 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
210                                  decode_lock_denied_maxsz)
211 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
212 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
213                                  decode_lock_denied_maxsz)
214 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
215                                  encode_stateid_maxsz + \
216                                  4)
217 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
218                                  decode_stateid_maxsz)
219 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
220 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
221 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
222                                 1 + nfs4_name_maxsz + \
223                                 1 + \
224                                 nfs4_fattr_maxsz)
225 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
226 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
227                                 1 + 2 + nfs4_name_maxsz + \
228                                 encode_attrs_maxsz)
229 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
230                                 decode_change_info_maxsz + \
231                                 nfs4_fattr_bitmap_maxsz)
232 #define encode_statfs_maxsz     (encode_getattr_maxsz)
233 #define decode_statfs_maxsz     (decode_getattr_maxsz)
234 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
235 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
236 #define encode_getacl_maxsz     (encode_getattr_maxsz)
237 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
238                                  nfs4_fattr_bitmap_maxsz + 1)
239 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
240                                  encode_stateid_maxsz + 3)
241 #define decode_setacl_maxsz     (decode_setattr_maxsz)
242 #define encode_fs_locations_maxsz \
243                                 (encode_getattr_maxsz)
244 #define decode_fs_locations_maxsz \
245                                 (0)
246
247 #if defined(CONFIG_NFS_V4_1)
248 #define NFS4_MAX_MACHINE_NAME_LEN (64)
249
250 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
251                                 encode_verifier_maxsz + \
252                                 1 /* co_ownerid.len */ + \
253                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
254                                 1 /* flags */ + \
255                                 1 /* spa_how */ + \
256                                 0 /* SP4_NONE (for now) */ + \
257                                 1 /* zero implemetation id array */)
258 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
259                                 2 /* eir_clientid */ + \
260                                 1 /* eir_sequenceid */ + \
261                                 1 /* eir_flags */ + \
262                                 1 /* spr_how */ + \
263                                 0 /* SP4_NONE (for now) */ + \
264                                 2 /* eir_server_owner.so_minor_id */ + \
265                                 /* eir_server_owner.so_major_id<> */ \
266                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
267                                 /* eir_server_scope<> */ \
268                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
269                                 1 /* eir_server_impl_id array length */ + \
270                                 0 /* ignored eir_server_impl_id contents */)
271 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
272 #define decode_channel_attrs_maxsz  (6 + \
273                                      1 /* ca_rdma_ird.len */ + \
274                                      1 /* ca_rdma_ird */)
275 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
276                                      2 /* csa_clientid */ + \
277                                      1 /* csa_sequence */ + \
278                                      1 /* csa_flags */ + \
279                                      encode_channel_attrs_maxsz + \
280                                      encode_channel_attrs_maxsz + \
281                                      1 /* csa_cb_program */ + \
282                                      1 /* csa_sec_parms.len (1) */ + \
283                                      1 /* cb_secflavor (AUTH_SYS) */ + \
284                                      1 /* stamp */ + \
285                                      1 /* machinename.len */ + \
286                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
287                                      1 /* uid */ + \
288                                      1 /* gid */ + \
289                                      1 /* gids.len (0) */)
290 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
291                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
292                                      1 /* csr_sequence */ + \
293                                      1 /* csr_flags */ + \
294                                      decode_channel_attrs_maxsz + \
295                                      decode_channel_attrs_maxsz)
296 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
297 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
298 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
299                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
300 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
301                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
302 #else /* CONFIG_NFS_V4_1 */
303 #define encode_sequence_maxsz   0
304 #define decode_sequence_maxsz   0
305 #endif /* CONFIG_NFS_V4_1 */
306
307 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
308 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
309 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
310                                 encode_sequence_maxsz + \
311                                 encode_putfh_maxsz + \
312                                 encode_read_maxsz)
313 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
314                                 decode_sequence_maxsz + \
315                                 decode_putfh_maxsz + \
316                                 decode_read_maxsz)
317 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
318                                 encode_sequence_maxsz + \
319                                 encode_putfh_maxsz + \
320                                 encode_readlink_maxsz)
321 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
322                                 decode_sequence_maxsz + \
323                                 decode_putfh_maxsz + \
324                                 decode_readlink_maxsz)
325 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
326                                 encode_sequence_maxsz + \
327                                 encode_putfh_maxsz + \
328                                 encode_readdir_maxsz)
329 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
330                                 decode_sequence_maxsz + \
331                                 decode_putfh_maxsz + \
332                                 decode_readdir_maxsz)
333 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
334                                 encode_sequence_maxsz + \
335                                 encode_putfh_maxsz + \
336                                 encode_write_maxsz + \
337                                 encode_getattr_maxsz)
338 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
339                                 decode_sequence_maxsz + \
340                                 decode_putfh_maxsz + \
341                                 decode_write_maxsz + \
342                                 decode_getattr_maxsz)
343 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
344                                 encode_sequence_maxsz + \
345                                 encode_putfh_maxsz + \
346                                 encode_commit_maxsz + \
347                                 encode_getattr_maxsz)
348 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
349                                 decode_sequence_maxsz + \
350                                 decode_putfh_maxsz + \
351                                 decode_commit_maxsz + \
352                                 decode_getattr_maxsz)
353 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
354                                 encode_sequence_maxsz + \
355                                 encode_putfh_maxsz + \
356                                 encode_savefh_maxsz + \
357                                 encode_open_maxsz + \
358                                 encode_getfh_maxsz + \
359                                 encode_getattr_maxsz + \
360                                 encode_restorefh_maxsz + \
361                                 encode_getattr_maxsz)
362 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
363                                 decode_sequence_maxsz + \
364                                 decode_putfh_maxsz + \
365                                 decode_savefh_maxsz + \
366                                 decode_open_maxsz + \
367                                 decode_getfh_maxsz + \
368                                 decode_getattr_maxsz + \
369                                 decode_restorefh_maxsz + \
370                                 decode_getattr_maxsz)
371 #define NFS4_enc_open_confirm_sz \
372                                 (compound_encode_hdr_maxsz + \
373                                  encode_putfh_maxsz + \
374                                  encode_open_confirm_maxsz)
375 #define NFS4_dec_open_confirm_sz \
376                                 (compound_decode_hdr_maxsz + \
377                                  decode_putfh_maxsz + \
378                                  decode_open_confirm_maxsz)
379 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
380                                         encode_sequence_maxsz + \
381                                         encode_putfh_maxsz + \
382                                         encode_open_maxsz + \
383                                         encode_getattr_maxsz)
384 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
385                                         decode_sequence_maxsz + \
386                                         decode_putfh_maxsz + \
387                                         decode_open_maxsz + \
388                                         decode_getattr_maxsz)
389 #define NFS4_enc_open_downgrade_sz \
390                                 (compound_encode_hdr_maxsz + \
391                                  encode_sequence_maxsz + \
392                                  encode_putfh_maxsz + \
393                                  encode_open_downgrade_maxsz + \
394                                  encode_getattr_maxsz)
395 #define NFS4_dec_open_downgrade_sz \
396                                 (compound_decode_hdr_maxsz + \
397                                  decode_sequence_maxsz + \
398                                  decode_putfh_maxsz + \
399                                  decode_open_downgrade_maxsz + \
400                                  decode_getattr_maxsz)
401 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
402                                  encode_sequence_maxsz + \
403                                  encode_putfh_maxsz + \
404                                  encode_close_maxsz + \
405                                  encode_getattr_maxsz)
406 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
407                                  decode_sequence_maxsz + \
408                                  decode_putfh_maxsz + \
409                                  decode_close_maxsz + \
410                                  decode_getattr_maxsz)
411 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
412                                  encode_sequence_maxsz + \
413                                  encode_putfh_maxsz + \
414                                  encode_setattr_maxsz + \
415                                  encode_getattr_maxsz)
416 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
417                                  decode_sequence_maxsz + \
418                                  decode_putfh_maxsz + \
419                                  decode_setattr_maxsz + \
420                                  decode_getattr_maxsz)
421 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
422                                 encode_sequence_maxsz + \
423                                 encode_putfh_maxsz + \
424                                 encode_fsinfo_maxsz)
425 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
426                                 decode_sequence_maxsz + \
427                                 decode_putfh_maxsz + \
428                                 decode_fsinfo_maxsz)
429 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
430                                 encode_renew_maxsz)
431 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
432                                 decode_renew_maxsz)
433 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
434                                 encode_setclientid_maxsz)
435 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
436                                 decode_setclientid_maxsz)
437 #define NFS4_enc_setclientid_confirm_sz \
438                                 (compound_encode_hdr_maxsz + \
439                                 encode_setclientid_confirm_maxsz + \
440                                 encode_putrootfh_maxsz + \
441                                 encode_fsinfo_maxsz)
442 #define NFS4_dec_setclientid_confirm_sz \
443                                 (compound_decode_hdr_maxsz + \
444                                 decode_setclientid_confirm_maxsz + \
445                                 decode_putrootfh_maxsz + \
446                                 decode_fsinfo_maxsz)
447 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
448                                 encode_sequence_maxsz + \
449                                 encode_putfh_maxsz + \
450                                 encode_lock_maxsz)
451 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
452                                 decode_sequence_maxsz + \
453                                 decode_putfh_maxsz + \
454                                 decode_lock_maxsz)
455 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
456                                 encode_sequence_maxsz + \
457                                 encode_putfh_maxsz + \
458                                 encode_lockt_maxsz)
459 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
460                                  decode_sequence_maxsz + \
461                                  decode_putfh_maxsz + \
462                                  decode_lockt_maxsz)
463 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
464                                 encode_sequence_maxsz + \
465                                 encode_putfh_maxsz + \
466                                 encode_locku_maxsz)
467 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
468                                 decode_sequence_maxsz + \
469                                 decode_putfh_maxsz + \
470                                 decode_locku_maxsz)
471 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
472                                 encode_sequence_maxsz + \
473                                 encode_putfh_maxsz + \
474                                 encode_access_maxsz + \
475                                 encode_getattr_maxsz)
476 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
477                                 decode_sequence_maxsz + \
478                                 decode_putfh_maxsz + \
479                                 decode_access_maxsz + \
480                                 decode_getattr_maxsz)
481 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
482                                 encode_sequence_maxsz + \
483                                 encode_putfh_maxsz + \
484                                 encode_getattr_maxsz)
485 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
486                                 decode_sequence_maxsz + \
487                                 decode_putfh_maxsz + \
488                                 decode_getattr_maxsz)
489 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
490                                 encode_sequence_maxsz + \
491                                 encode_putfh_maxsz + \
492                                 encode_lookup_maxsz + \
493                                 encode_getattr_maxsz + \
494                                 encode_getfh_maxsz)
495 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
496                                 decode_sequence_maxsz + \
497                                 decode_putfh_maxsz + \
498                                 decode_lookup_maxsz + \
499                                 decode_getattr_maxsz + \
500                                 decode_getfh_maxsz)
501 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
502                                 encode_sequence_maxsz + \
503                                 encode_putrootfh_maxsz + \
504                                 encode_getattr_maxsz + \
505                                 encode_getfh_maxsz)
506 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
507                                 decode_sequence_maxsz + \
508                                 decode_putrootfh_maxsz + \
509                                 decode_getattr_maxsz + \
510                                 decode_getfh_maxsz)
511 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
512                                 encode_sequence_maxsz + \
513                                 encode_putfh_maxsz + \
514                                 encode_remove_maxsz + \
515                                 encode_getattr_maxsz)
516 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
517                                 decode_sequence_maxsz + \
518                                 decode_putfh_maxsz + \
519                                 decode_remove_maxsz + \
520                                 decode_getattr_maxsz)
521 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
522                                 encode_sequence_maxsz + \
523                                 encode_putfh_maxsz + \
524                                 encode_savefh_maxsz + \
525                                 encode_putfh_maxsz + \
526                                 encode_rename_maxsz + \
527                                 encode_getattr_maxsz + \
528                                 encode_restorefh_maxsz + \
529                                 encode_getattr_maxsz)
530 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
531                                 decode_sequence_maxsz + \
532                                 decode_putfh_maxsz + \
533                                 decode_savefh_maxsz + \
534                                 decode_putfh_maxsz + \
535                                 decode_rename_maxsz + \
536                                 decode_getattr_maxsz + \
537                                 decode_restorefh_maxsz + \
538                                 decode_getattr_maxsz)
539 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
540                                 encode_sequence_maxsz + \
541                                 encode_putfh_maxsz + \
542                                 encode_savefh_maxsz + \
543                                 encode_putfh_maxsz + \
544                                 encode_link_maxsz + \
545                                 decode_getattr_maxsz + \
546                                 encode_restorefh_maxsz + \
547                                 decode_getattr_maxsz)
548 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
549                                 decode_sequence_maxsz + \
550                                 decode_putfh_maxsz + \
551                                 decode_savefh_maxsz + \
552                                 decode_putfh_maxsz + \
553                                 decode_link_maxsz + \
554                                 decode_getattr_maxsz + \
555                                 decode_restorefh_maxsz + \
556                                 decode_getattr_maxsz)
557 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
558                                 encode_sequence_maxsz + \
559                                 encode_putfh_maxsz + \
560                                 encode_symlink_maxsz + \
561                                 encode_getattr_maxsz + \
562                                 encode_getfh_maxsz)
563 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
564                                 decode_sequence_maxsz + \
565                                 decode_putfh_maxsz + \
566                                 decode_symlink_maxsz + \
567                                 decode_getattr_maxsz + \
568                                 decode_getfh_maxsz)
569 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
570                                 encode_sequence_maxsz + \
571                                 encode_putfh_maxsz + \
572                                 encode_savefh_maxsz + \
573                                 encode_create_maxsz + \
574                                 encode_getfh_maxsz + \
575                                 encode_getattr_maxsz + \
576                                 encode_restorefh_maxsz + \
577                                 encode_getattr_maxsz)
578 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
579                                 decode_sequence_maxsz + \
580                                 decode_putfh_maxsz + \
581                                 decode_savefh_maxsz + \
582                                 decode_create_maxsz + \
583                                 decode_getfh_maxsz + \
584                                 decode_getattr_maxsz + \
585                                 decode_restorefh_maxsz + \
586                                 decode_getattr_maxsz)
587 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
588                                 encode_sequence_maxsz + \
589                                 encode_putfh_maxsz + \
590                                 encode_getattr_maxsz)
591 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
592                                 decode_sequence_maxsz + \
593                                 decode_putfh_maxsz + \
594                                 decode_getattr_maxsz)
595 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
596                                 encode_sequence_maxsz + \
597                                 encode_putfh_maxsz + \
598                                 encode_statfs_maxsz)
599 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
600                                 decode_sequence_maxsz + \
601                                 decode_putfh_maxsz + \
602                                 decode_statfs_maxsz)
603 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
604                                 encode_sequence_maxsz + \
605                                 encode_putfh_maxsz + \
606                                 encode_getattr_maxsz)
607 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
608                                 decode_sequence_maxsz + \
609                                 decode_putfh_maxsz + \
610                                 decode_getattr_maxsz)
611 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
612                                 encode_sequence_maxsz + \
613                                 encode_putfh_maxsz + \
614                                 encode_delegreturn_maxsz + \
615                                 encode_getattr_maxsz)
616 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
617                                 decode_sequence_maxsz + \
618                                 decode_delegreturn_maxsz + \
619                                 decode_getattr_maxsz)
620 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
621                                 encode_sequence_maxsz + \
622                                 encode_putfh_maxsz + \
623                                 encode_getacl_maxsz)
624 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
625                                 decode_sequence_maxsz + \
626                                 decode_putfh_maxsz + \
627                                 decode_getacl_maxsz)
628 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
629                                 encode_sequence_maxsz + \
630                                 encode_putfh_maxsz + \
631                                 encode_setacl_maxsz)
632 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
633                                 decode_sequence_maxsz + \
634                                 decode_putfh_maxsz + \
635                                 decode_setacl_maxsz)
636 #define NFS4_enc_fs_locations_sz \
637                                 (compound_encode_hdr_maxsz + \
638                                  encode_sequence_maxsz + \
639                                  encode_putfh_maxsz + \
640                                  encode_lookup_maxsz + \
641                                  encode_fs_locations_maxsz)
642 #define NFS4_dec_fs_locations_sz \
643                                 (compound_decode_hdr_maxsz + \
644                                  decode_sequence_maxsz + \
645                                  decode_putfh_maxsz + \
646                                  decode_lookup_maxsz + \
647                                  decode_fs_locations_maxsz)
648 #if defined(CONFIG_NFS_V4_1)
649 #define NFS4_enc_exchange_id_sz \
650                                 (compound_encode_hdr_maxsz + \
651                                  encode_exchange_id_maxsz)
652 #define NFS4_dec_exchange_id_sz \
653                                 (compound_decode_hdr_maxsz + \
654                                  decode_exchange_id_maxsz)
655 #define NFS4_enc_create_session_sz \
656                                 (compound_encode_hdr_maxsz + \
657                                  encode_create_session_maxsz)
658 #define NFS4_dec_create_session_sz \
659                                 (compound_decode_hdr_maxsz + \
660                                  decode_create_session_maxsz)
661 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
662                                          encode_destroy_session_maxsz)
663 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
664                                          decode_destroy_session_maxsz)
665 #define NFS4_enc_sequence_sz \
666                                 (compound_decode_hdr_maxsz + \
667                                  encode_sequence_maxsz)
668 #define NFS4_dec_sequence_sz \
669                                 (compound_decode_hdr_maxsz + \
670                                  decode_sequence_maxsz)
671 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
672                                          encode_sequence_maxsz + \
673                                          encode_putrootfh_maxsz + \
674                                          encode_fsinfo_maxsz)
675 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
676                                          decode_sequence_maxsz + \
677                                          decode_putrootfh_maxsz + \
678                                          decode_fsinfo_maxsz)
679 #endif /* CONFIG_NFS_V4_1 */
680
681 static const umode_t nfs_type2fmt[] = {
682         [NF4BAD] = 0,
683         [NF4REG] = S_IFREG,
684         [NF4DIR] = S_IFDIR,
685         [NF4BLK] = S_IFBLK,
686         [NF4CHR] = S_IFCHR,
687         [NF4LNK] = S_IFLNK,
688         [NF4SOCK] = S_IFSOCK,
689         [NF4FIFO] = S_IFIFO,
690         [NF4ATTRDIR] = 0,
691         [NF4NAMEDATTR] = 0,
692 };
693
694 struct compound_hdr {
695         int32_t         status;
696         uint32_t        nops;
697         __be32 *        nops_p;
698         uint32_t        taglen;
699         char *          tag;
700         uint32_t        replen;         /* expected reply words */
701         u32             minorversion;
702 };
703
704 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
705 {
706         __be32 *p = xdr_reserve_space(xdr, nbytes);
707         BUG_ON(!p);
708         return p;
709 }
710
711 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
712 {
713         __be32 *p;
714
715         p = xdr_reserve_space(xdr, 4 + len);
716         BUG_ON(p == NULL);
717         xdr_encode_opaque(p, str, len);
718 }
719
720 static void encode_compound_hdr(struct xdr_stream *xdr,
721                                 struct rpc_rqst *req,
722                                 struct compound_hdr *hdr)
723 {
724         __be32 *p;
725         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
726
727         /* initialize running count of expected bytes in reply.
728          * NOTE: the replied tag SHOULD be the same is the one sent,
729          * but this is not required as a MUST for the server to do so. */
730         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
731
732         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
733         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
734         p = reserve_space(xdr, 4 + hdr->taglen + 8);
735         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
736         *p++ = cpu_to_be32(hdr->minorversion);
737         hdr->nops_p = p;
738         *p = cpu_to_be32(hdr->nops);
739 }
740
741 static void encode_nops(struct compound_hdr *hdr)
742 {
743         BUG_ON(hdr->nops > NFS4_MAX_OPS);
744         *hdr->nops_p = htonl(hdr->nops);
745 }
746
747 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
748 {
749         __be32 *p;
750
751         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
752         BUG_ON(p == NULL);
753         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
754 }
755
756 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
757 {
758         char owner_name[IDMAP_NAMESZ];
759         char owner_group[IDMAP_NAMESZ];
760         int owner_namelen = 0;
761         int owner_grouplen = 0;
762         __be32 *p;
763         __be32 *q;
764         int len;
765         uint32_t bmval0 = 0;
766         uint32_t bmval1 = 0;
767
768         /*
769          * We reserve enough space to write the entire attribute buffer at once.
770          * In the worst-case, this would be
771          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
772          *          = 36 bytes, plus any contribution from variable-length fields
773          *            such as owner/group.
774          */
775         len = 16;
776
777         /* Sigh */
778         if (iap->ia_valid & ATTR_SIZE)
779                 len += 8;
780         if (iap->ia_valid & ATTR_MODE)
781                 len += 4;
782         if (iap->ia_valid & ATTR_UID) {
783                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
784                 if (owner_namelen < 0) {
785                         dprintk("nfs: couldn't resolve uid %d to string\n",
786                                         iap->ia_uid);
787                         /* XXX */
788                         strcpy(owner_name, "nobody");
789                         owner_namelen = sizeof("nobody") - 1;
790                         /* goto out; */
791                 }
792                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
793         }
794         if (iap->ia_valid & ATTR_GID) {
795                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
796                 if (owner_grouplen < 0) {
797                         dprintk("nfs: couldn't resolve gid %d to string\n",
798                                         iap->ia_gid);
799                         strcpy(owner_group, "nobody");
800                         owner_grouplen = sizeof("nobody") - 1;
801                         /* goto out; */
802                 }
803                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
804         }
805         if (iap->ia_valid & ATTR_ATIME_SET)
806                 len += 16;
807         else if (iap->ia_valid & ATTR_ATIME)
808                 len += 4;
809         if (iap->ia_valid & ATTR_MTIME_SET)
810                 len += 16;
811         else if (iap->ia_valid & ATTR_MTIME)
812                 len += 4;
813         p = reserve_space(xdr, len);
814
815         /*
816          * We write the bitmap length now, but leave the bitmap and the attribute
817          * buffer length to be backfilled at the end of this routine.
818          */
819         *p++ = cpu_to_be32(2);
820         q = p;
821         p += 3;
822
823         if (iap->ia_valid & ATTR_SIZE) {
824                 bmval0 |= FATTR4_WORD0_SIZE;
825                 p = xdr_encode_hyper(p, iap->ia_size);
826         }
827         if (iap->ia_valid & ATTR_MODE) {
828                 bmval1 |= FATTR4_WORD1_MODE;
829                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
830         }
831         if (iap->ia_valid & ATTR_UID) {
832                 bmval1 |= FATTR4_WORD1_OWNER;
833                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
834         }
835         if (iap->ia_valid & ATTR_GID) {
836                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
837                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
838         }
839         if (iap->ia_valid & ATTR_ATIME_SET) {
840                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
841                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
842                 *p++ = cpu_to_be32(0);
843                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
844                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
845         }
846         else if (iap->ia_valid & ATTR_ATIME) {
847                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
848                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
849         }
850         if (iap->ia_valid & ATTR_MTIME_SET) {
851                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
852                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
853                 *p++ = cpu_to_be32(0);
854                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
856         }
857         else if (iap->ia_valid & ATTR_MTIME) {
858                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
859                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
860         }
861
862         /*
863          * Now we backfill the bitmap and the attribute buffer length.
864          */
865         if (len != ((char *)p - (char *)q) + 4) {
866                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
867                                 len, ((char *)p - (char *)q) + 4);
868                 BUG();
869         }
870         len = (char *)p - (char *)q - 12;
871         *q++ = htonl(bmval0);
872         *q++ = htonl(bmval1);
873         *q = htonl(len);
874
875 /* out: */
876 }
877
878 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
879 {
880         __be32 *p;
881
882         p = reserve_space(xdr, 8);
883         *p++ = cpu_to_be32(OP_ACCESS);
884         *p = cpu_to_be32(access);
885         hdr->nops++;
886         hdr->replen += decode_access_maxsz;
887 }
888
889 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
890 {
891         __be32 *p;
892
893         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
894         *p++ = cpu_to_be32(OP_CLOSE);
895         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
896         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
897         hdr->nops++;
898         hdr->replen += decode_close_maxsz;
899 }
900
901 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
902 {
903         __be32 *p;
904
905         p = reserve_space(xdr, 16);
906         *p++ = cpu_to_be32(OP_COMMIT);
907         p = xdr_encode_hyper(p, args->offset);
908         *p = cpu_to_be32(args->count);
909         hdr->nops++;
910         hdr->replen += decode_commit_maxsz;
911 }
912
913 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
914 {
915         __be32 *p;
916
917         p = reserve_space(xdr, 8);
918         *p++ = cpu_to_be32(OP_CREATE);
919         *p = cpu_to_be32(create->ftype);
920
921         switch (create->ftype) {
922         case NF4LNK:
923                 p = reserve_space(xdr, 4);
924                 *p = cpu_to_be32(create->u.symlink.len);
925                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
926                 break;
927
928         case NF4BLK: case NF4CHR:
929                 p = reserve_space(xdr, 8);
930                 *p++ = cpu_to_be32(create->u.device.specdata1);
931                 *p = cpu_to_be32(create->u.device.specdata2);
932                 break;
933
934         default:
935                 break;
936         }
937
938         encode_string(xdr, create->name->len, create->name->name);
939         hdr->nops++;
940         hdr->replen += decode_create_maxsz;
941
942         encode_attrs(xdr, create->attrs, create->server);
943 }
944
945 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
946 {
947         __be32 *p;
948
949         p = reserve_space(xdr, 12);
950         *p++ = cpu_to_be32(OP_GETATTR);
951         *p++ = cpu_to_be32(1);
952         *p = cpu_to_be32(bitmap);
953         hdr->nops++;
954         hdr->replen += decode_getattr_maxsz;
955 }
956
957 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
958 {
959         __be32 *p;
960
961         p = reserve_space(xdr, 16);
962         *p++ = cpu_to_be32(OP_GETATTR);
963         *p++ = cpu_to_be32(2);
964         *p++ = cpu_to_be32(bm0);
965         *p = cpu_to_be32(bm1);
966         hdr->nops++;
967         hdr->replen += decode_getattr_maxsz;
968 }
969
970 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
971 {
972         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
973                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
974 }
975
976 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
977 {
978         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
979                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
980 }
981
982 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
983 {
984         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
985                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
986 }
987
988 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
989 {
990         __be32 *p;
991
992         p = reserve_space(xdr, 4);
993         *p = cpu_to_be32(OP_GETFH);
994         hdr->nops++;
995         hdr->replen += decode_getfh_maxsz;
996 }
997
998 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
999 {
1000         __be32 *p;
1001
1002         p = reserve_space(xdr, 8 + name->len);
1003         *p++ = cpu_to_be32(OP_LINK);
1004         xdr_encode_opaque(p, name->name, name->len);
1005         hdr->nops++;
1006         hdr->replen += decode_link_maxsz;
1007 }
1008
1009 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1010 {
1011         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1012                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1013         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1014 }
1015
1016 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1017 {
1018         if (fl->fl_end == OFFSET_MAX)
1019                 return ~(uint64_t)0;
1020         return fl->fl_end - fl->fl_start + 1;
1021 }
1022
1023 /*
1024  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1025  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1026  */
1027 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1028 {
1029         __be32 *p;
1030
1031         p = reserve_space(xdr, 32);
1032         *p++ = cpu_to_be32(OP_LOCK);
1033         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1034         *p++ = cpu_to_be32(args->reclaim);
1035         p = xdr_encode_hyper(p, args->fl->fl_start);
1036         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1037         *p = cpu_to_be32(args->new_lock_owner);
1038         if (args->new_lock_owner){
1039                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1040                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1041                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1042                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1043                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1044                 *p++ = cpu_to_be32(16);
1045                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1046                 xdr_encode_hyper(p, args->lock_owner.id);
1047         }
1048         else {
1049                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1050                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1051                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1052         }
1053         hdr->nops++;
1054         hdr->replen += decode_lock_maxsz;
1055 }
1056
1057 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1058 {
1059         __be32 *p;
1060
1061         p = reserve_space(xdr, 52);
1062         *p++ = cpu_to_be32(OP_LOCKT);
1063         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1064         p = xdr_encode_hyper(p, args->fl->fl_start);
1065         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1066         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1067         *p++ = cpu_to_be32(16);
1068         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1069         xdr_encode_hyper(p, args->lock_owner.id);
1070         hdr->nops++;
1071         hdr->replen += decode_lockt_maxsz;
1072 }
1073
1074 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1075 {
1076         __be32 *p;
1077
1078         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1079         *p++ = cpu_to_be32(OP_LOCKU);
1080         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1081         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1082         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1083         p = xdr_encode_hyper(p, args->fl->fl_start);
1084         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1085         hdr->nops++;
1086         hdr->replen += decode_locku_maxsz;
1087 }
1088
1089 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1090 {
1091         int len = name->len;
1092         __be32 *p;
1093
1094         p = reserve_space(xdr, 8 + len);
1095         *p++ = cpu_to_be32(OP_LOOKUP);
1096         xdr_encode_opaque(p, name->name, len);
1097         hdr->nops++;
1098         hdr->replen += decode_lookup_maxsz;
1099 }
1100
1101 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1102 {
1103         __be32 *p;
1104
1105         p = reserve_space(xdr, 8);
1106         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1107         case FMODE_READ:
1108                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1109                 break;
1110         case FMODE_WRITE:
1111                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1112                 break;
1113         case FMODE_READ|FMODE_WRITE:
1114                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1115                 break;
1116         default:
1117                 *p++ = cpu_to_be32(0);
1118         }
1119         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1120 }
1121
1122 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1123 {
1124         __be32 *p;
1125  /*
1126  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1127  * owner 4 = 32
1128  */
1129         p = reserve_space(xdr, 8);
1130         *p++ = cpu_to_be32(OP_OPEN);
1131         *p = cpu_to_be32(arg->seqid->sequence->counter);
1132         encode_share_access(xdr, arg->fmode);
1133         p = reserve_space(xdr, 28);
1134         p = xdr_encode_hyper(p, arg->clientid);
1135         *p++ = cpu_to_be32(16);
1136         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1137         xdr_encode_hyper(p, arg->id);
1138 }
1139
1140 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1141 {
1142         __be32 *p;
1143
1144         p = reserve_space(xdr, 4);
1145         switch(arg->open_flags & O_EXCL) {
1146         case 0:
1147                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1148                 encode_attrs(xdr, arg->u.attrs, arg->server);
1149                 break;
1150         default:
1151                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1152                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1153         }
1154 }
1155
1156 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1157 {
1158         __be32 *p;
1159
1160         p = reserve_space(xdr, 4);
1161         switch (arg->open_flags & O_CREAT) {
1162         case 0:
1163                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1164                 break;
1165         default:
1166                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1167                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1168                 encode_createmode(xdr, arg);
1169         }
1170 }
1171
1172 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1173 {
1174         __be32 *p;
1175
1176         p = reserve_space(xdr, 4);
1177         switch (delegation_type) {
1178         case 0:
1179                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1180                 break;
1181         case FMODE_READ:
1182                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1183                 break;
1184         case FMODE_WRITE|FMODE_READ:
1185                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1186                 break;
1187         default:
1188                 BUG();
1189         }
1190 }
1191
1192 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1193 {
1194         __be32 *p;
1195
1196         p = reserve_space(xdr, 4);
1197         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1198         encode_string(xdr, name->len, name->name);
1199 }
1200
1201 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1202 {
1203         __be32 *p;
1204
1205         p = reserve_space(xdr, 4);
1206         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1207         encode_delegation_type(xdr, type);
1208 }
1209
1210 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1211 {
1212         __be32 *p;
1213
1214         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1215         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1216         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1217         encode_string(xdr, name->len, name->name);
1218 }
1219
1220 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1221 {
1222         encode_openhdr(xdr, arg);
1223         encode_opentype(xdr, arg);
1224         switch (arg->claim) {
1225         case NFS4_OPEN_CLAIM_NULL:
1226                 encode_claim_null(xdr, arg->name);
1227                 break;
1228         case NFS4_OPEN_CLAIM_PREVIOUS:
1229                 encode_claim_previous(xdr, arg->u.delegation_type);
1230                 break;
1231         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1232                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1233                 break;
1234         default:
1235                 BUG();
1236         }
1237         hdr->nops++;
1238         hdr->replen += decode_open_maxsz;
1239 }
1240
1241 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1242 {
1243         __be32 *p;
1244
1245         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1246         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1247         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1248         *p = cpu_to_be32(arg->seqid->sequence->counter);
1249         hdr->nops++;
1250         hdr->replen += decode_open_confirm_maxsz;
1251 }
1252
1253 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1254 {
1255         __be32 *p;
1256
1257         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1258         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1259         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1260         *p = cpu_to_be32(arg->seqid->sequence->counter);
1261         encode_share_access(xdr, arg->fmode);
1262         hdr->nops++;
1263         hdr->replen += decode_open_downgrade_maxsz;
1264 }
1265
1266 static void
1267 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1268 {
1269         int len = fh->size;
1270         __be32 *p;
1271
1272         p = reserve_space(xdr, 8 + len);
1273         *p++ = cpu_to_be32(OP_PUTFH);
1274         xdr_encode_opaque(p, fh->data, len);
1275         hdr->nops++;
1276         hdr->replen += decode_putfh_maxsz;
1277 }
1278
1279 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1280 {
1281         __be32 *p;
1282
1283         p = reserve_space(xdr, 4);
1284         *p = cpu_to_be32(OP_PUTROOTFH);
1285         hdr->nops++;
1286         hdr->replen += decode_putrootfh_maxsz;
1287 }
1288
1289 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1290 {
1291         nfs4_stateid stateid;
1292         __be32 *p;
1293
1294         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1295         if (ctx->state != NULL) {
1296                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1297                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1298         } else
1299                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1300 }
1301
1302 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1303 {
1304         __be32 *p;
1305
1306         p = reserve_space(xdr, 4);
1307         *p = cpu_to_be32(OP_READ);
1308
1309         encode_stateid(xdr, args->context);
1310
1311         p = reserve_space(xdr, 12);
1312         p = xdr_encode_hyper(p, args->offset);
1313         *p = cpu_to_be32(args->count);
1314         hdr->nops++;
1315         hdr->replen += decode_read_maxsz;
1316 }
1317
1318 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1319 {
1320         uint32_t attrs[2] = {
1321                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1322                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1323         };
1324         __be32 *p;
1325
1326         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1327         *p++ = cpu_to_be32(OP_READDIR);
1328         p = xdr_encode_hyper(p, readdir->cookie);
1329         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1330         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1331         *p++ = cpu_to_be32(readdir->count);
1332         *p++ = cpu_to_be32(2);
1333         /* Switch to mounted_on_fileid if the server supports it */
1334         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1335                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1336         else
1337                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1338         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1339         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1340         hdr->nops++;
1341         hdr->replen += decode_readdir_maxsz;
1342         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1343                         __func__,
1344                         (unsigned long long)readdir->cookie,
1345                         ((u32 *)readdir->verifier.data)[0],
1346                         ((u32 *)readdir->verifier.data)[1],
1347                         attrs[0] & readdir->bitmask[0],
1348                         attrs[1] & readdir->bitmask[1]);
1349 }
1350
1351 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1352 {
1353         __be32 *p;
1354
1355         p = reserve_space(xdr, 4);
1356         *p = cpu_to_be32(OP_READLINK);
1357         hdr->nops++;
1358         hdr->replen += decode_readlink_maxsz;
1359 }
1360
1361 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1362 {
1363         __be32 *p;
1364
1365         p = reserve_space(xdr, 8 + name->len);
1366         *p++ = cpu_to_be32(OP_REMOVE);
1367         xdr_encode_opaque(p, name->name, name->len);
1368         hdr->nops++;
1369         hdr->replen += decode_remove_maxsz;
1370 }
1371
1372 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1373 {
1374         __be32 *p;
1375
1376         p = reserve_space(xdr, 4);
1377         *p = cpu_to_be32(OP_RENAME);
1378         encode_string(xdr, oldname->len, oldname->name);
1379         encode_string(xdr, newname->len, newname->name);
1380         hdr->nops++;
1381         hdr->replen += decode_rename_maxsz;
1382 }
1383
1384 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1385 {
1386         __be32 *p;
1387
1388         p = reserve_space(xdr, 12);
1389         *p++ = cpu_to_be32(OP_RENEW);
1390         xdr_encode_hyper(p, client_stateid->cl_clientid);
1391         hdr->nops++;
1392         hdr->replen += decode_renew_maxsz;
1393 }
1394
1395 static void
1396 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1397 {
1398         __be32 *p;
1399
1400         p = reserve_space(xdr, 4);
1401         *p = cpu_to_be32(OP_RESTOREFH);
1402         hdr->nops++;
1403         hdr->replen += decode_restorefh_maxsz;
1404 }
1405
1406 static int
1407 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1408 {
1409         __be32 *p;
1410
1411         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1412         *p++ = cpu_to_be32(OP_SETATTR);
1413         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1414         p = reserve_space(xdr, 2*4);
1415         *p++ = cpu_to_be32(1);
1416         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1417         if (arg->acl_len % 4)
1418                 return -EINVAL;
1419         p = reserve_space(xdr, 4);
1420         *p = cpu_to_be32(arg->acl_len);
1421         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1422         hdr->nops++;
1423         hdr->replen += decode_setacl_maxsz;
1424         return 0;
1425 }
1426
1427 static void
1428 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         *p = cpu_to_be32(OP_SAVEFH);
1434         hdr->nops++;
1435         hdr->replen += decode_savefh_maxsz;
1436 }
1437
1438 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1443         *p++ = cpu_to_be32(OP_SETATTR);
1444         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1445         hdr->nops++;
1446         hdr->replen += decode_setattr_maxsz;
1447         encode_attrs(xdr, arg->iap, server);
1448 }
1449
1450 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1451 {
1452         __be32 *p;
1453
1454         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1455         *p++ = cpu_to_be32(OP_SETCLIENTID);
1456         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1457
1458         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1459         p = reserve_space(xdr, 4);
1460         *p = cpu_to_be32(setclientid->sc_prog);
1461         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1462         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1463         p = reserve_space(xdr, 4);
1464         *p = cpu_to_be32(setclientid->sc_cb_ident);
1465         hdr->nops++;
1466         hdr->replen += decode_setclientid_maxsz;
1467 }
1468
1469 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1470 {
1471         __be32 *p;
1472
1473         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1474         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1475         p = xdr_encode_hyper(p, client_state->cl_clientid);
1476         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1477         hdr->nops++;
1478         hdr->replen += decode_setclientid_confirm_maxsz;
1479 }
1480
1481 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1482 {
1483         __be32 *p;
1484
1485         p = reserve_space(xdr, 4);
1486         *p = cpu_to_be32(OP_WRITE);
1487
1488         encode_stateid(xdr, args->context);
1489
1490         p = reserve_space(xdr, 16);
1491         p = xdr_encode_hyper(p, args->offset);
1492         *p++ = cpu_to_be32(args->stable);
1493         *p = cpu_to_be32(args->count);
1494
1495         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1496         hdr->nops++;
1497         hdr->replen += decode_write_maxsz;
1498 }
1499
1500 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1505
1506         *p++ = cpu_to_be32(OP_DELEGRETURN);
1507         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1508         hdr->nops++;
1509         hdr->replen += decode_delegreturn_maxsz;
1510 }
1511
1512 #if defined(CONFIG_NFS_V4_1)
1513 /* NFSv4.1 operations */
1514 static void encode_exchange_id(struct xdr_stream *xdr,
1515                                struct nfs41_exchange_id_args *args,
1516                                struct compound_hdr *hdr)
1517 {
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1521         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1522         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1523
1524         encode_string(xdr, args->id_len, args->id);
1525
1526         p = reserve_space(xdr, 12);
1527         *p++ = cpu_to_be32(args->flags);
1528         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1529         *p = cpu_to_be32(0);    /* zero length implementation id array */
1530         hdr->nops++;
1531         hdr->replen += decode_exchange_id_maxsz;
1532 }
1533
1534 static void encode_create_session(struct xdr_stream *xdr,
1535                                   struct nfs41_create_session_args *args,
1536                                   struct compound_hdr *hdr)
1537 {
1538         __be32 *p;
1539         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1540         uint32_t len;
1541         struct nfs_client *clp = args->client;
1542
1543         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1544                         clp->cl_ipaddr);
1545
1546         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1547         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1548         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1549         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1550         *p++ = cpu_to_be32(args->flags);                        /*flags */
1551
1552         /* Fore Channel */
1553         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1554         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1555         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1556         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1557         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1558         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1559         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1560
1561         /* Back Channel */
1562         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1563         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1564         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1565         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1566         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1567         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1568         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1569
1570         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1571         *p++ = cpu_to_be32(1);
1572         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1573
1574         /* authsys_parms rfc1831 */
1575         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1576         p = xdr_encode_opaque(p, machine_name, len);
1577         *p++ = cpu_to_be32(0);                          /* UID */
1578         *p++ = cpu_to_be32(0);                          /* GID */
1579         *p = cpu_to_be32(0);                            /* No more gids */
1580         hdr->nops++;
1581         hdr->replen += decode_create_session_maxsz;
1582 }
1583
1584 static void encode_destroy_session(struct xdr_stream *xdr,
1585                                    struct nfs4_session *session,
1586                                    struct compound_hdr *hdr)
1587 {
1588         __be32 *p;
1589         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1590         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1591         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1592         hdr->nops++;
1593         hdr->replen += decode_destroy_session_maxsz;
1594 }
1595 #endif /* CONFIG_NFS_V4_1 */
1596
1597 static void encode_sequence(struct xdr_stream *xdr,
1598                             const struct nfs4_sequence_args *args,
1599                             struct compound_hdr *hdr)
1600 {
1601 #if defined(CONFIG_NFS_V4_1)
1602         struct nfs4_session *session = args->sa_session;
1603         struct nfs4_slot_table *tp;
1604         struct nfs4_slot *slot;
1605         __be32 *p;
1606
1607         if (!session)
1608                 return;
1609
1610         tp = &session->fc_slot_table;
1611
1612         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1613         slot = tp->slots + args->sa_slotid;
1614
1615         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1616         *p++ = cpu_to_be32(OP_SEQUENCE);
1617
1618         /*
1619          * Sessionid + seqid + slotid + max slotid + cache_this
1620          */
1621         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1622                 "max_slotid=%d cache_this=%d\n",
1623                 __func__,
1624                 ((u32 *)session->sess_id.data)[0],
1625                 ((u32 *)session->sess_id.data)[1],
1626                 ((u32 *)session->sess_id.data)[2],
1627                 ((u32 *)session->sess_id.data)[3],
1628                 slot->seq_nr, args->sa_slotid,
1629                 tp->highest_used_slotid, args->sa_cache_this);
1630         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1631         *p++ = cpu_to_be32(slot->seq_nr);
1632         *p++ = cpu_to_be32(args->sa_slotid);
1633         *p++ = cpu_to_be32(tp->highest_used_slotid);
1634         *p = cpu_to_be32(args->sa_cache_this);
1635         hdr->nops++;
1636         hdr->replen += decode_sequence_maxsz;
1637 #endif /* CONFIG_NFS_V4_1 */
1638 }
1639
1640 /*
1641  * END OF "GENERIC" ENCODE ROUTINES.
1642  */
1643
1644 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1645 {
1646 #if defined(CONFIG_NFS_V4_1)
1647         if (args->sa_session)
1648                 return args->sa_session->clp->cl_minorversion;
1649 #endif /* CONFIG_NFS_V4_1 */
1650         return 0;
1651 }
1652
1653 /*
1654  * Encode an ACCESS request
1655  */
1656 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1657 {
1658         struct xdr_stream xdr;
1659         struct compound_hdr hdr = {
1660                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1661         };
1662
1663         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664         encode_compound_hdr(&xdr, req, &hdr);
1665         encode_sequence(&xdr, &args->seq_args, &hdr);
1666         encode_putfh(&xdr, args->fh, &hdr);
1667         encode_access(&xdr, args->access, &hdr);
1668         encode_getfattr(&xdr, args->bitmask, &hdr);
1669         encode_nops(&hdr);
1670         return 0;
1671 }
1672
1673 /*
1674  * Encode LOOKUP request
1675  */
1676 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1677 {
1678         struct xdr_stream xdr;
1679         struct compound_hdr hdr = {
1680                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1681         };
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, req, &hdr);
1685         encode_sequence(&xdr, &args->seq_args, &hdr);
1686         encode_putfh(&xdr, args->dir_fh, &hdr);
1687         encode_lookup(&xdr, args->name, &hdr);
1688         encode_getfh(&xdr, &hdr);
1689         encode_getfattr(&xdr, args->bitmask, &hdr);
1690         encode_nops(&hdr);
1691         return 0;
1692 }
1693
1694 /*
1695  * Encode LOOKUP_ROOT request
1696  */
1697 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1698 {
1699         struct xdr_stream xdr;
1700         struct compound_hdr hdr = {
1701                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1702         };
1703
1704         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1705         encode_compound_hdr(&xdr, req, &hdr);
1706         encode_sequence(&xdr, &args->seq_args, &hdr);
1707         encode_putrootfh(&xdr, &hdr);
1708         encode_getfh(&xdr, &hdr);
1709         encode_getfattr(&xdr, args->bitmask, &hdr);
1710         encode_nops(&hdr);
1711         return 0;
1712 }
1713
1714 /*
1715  * Encode REMOVE request
1716  */
1717 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1718 {
1719         struct xdr_stream xdr;
1720         struct compound_hdr hdr = {
1721                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1722         };
1723
1724         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1725         encode_compound_hdr(&xdr, req, &hdr);
1726         encode_sequence(&xdr, &args->seq_args, &hdr);
1727         encode_putfh(&xdr, args->fh, &hdr);
1728         encode_remove(&xdr, &args->name, &hdr);
1729         encode_getfattr(&xdr, args->bitmask, &hdr);
1730         encode_nops(&hdr);
1731         return 0;
1732 }
1733
1734 /*
1735  * Encode RENAME request
1736  */
1737 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1738 {
1739         struct xdr_stream xdr;
1740         struct compound_hdr hdr = {
1741                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1742         };
1743
1744         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1745         encode_compound_hdr(&xdr, req, &hdr);
1746         encode_sequence(&xdr, &args->seq_args, &hdr);
1747         encode_putfh(&xdr, args->old_dir, &hdr);
1748         encode_savefh(&xdr, &hdr);
1749         encode_putfh(&xdr, args->new_dir, &hdr);
1750         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1751         encode_getfattr(&xdr, args->bitmask, &hdr);
1752         encode_restorefh(&xdr, &hdr);
1753         encode_getfattr(&xdr, args->bitmask, &hdr);
1754         encode_nops(&hdr);
1755         return 0;
1756 }
1757
1758 /*
1759  * Encode LINK request
1760  */
1761 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1762 {
1763         struct xdr_stream xdr;
1764         struct compound_hdr hdr = {
1765                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1766         };
1767
1768         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1769         encode_compound_hdr(&xdr, req, &hdr);
1770         encode_sequence(&xdr, &args->seq_args, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_savefh(&xdr, &hdr);
1773         encode_putfh(&xdr, args->dir_fh, &hdr);
1774         encode_link(&xdr, args->name, &hdr);
1775         encode_getfattr(&xdr, args->bitmask, &hdr);
1776         encode_restorefh(&xdr, &hdr);
1777         encode_getfattr(&xdr, args->bitmask, &hdr);
1778         encode_nops(&hdr);
1779         return 0;
1780 }
1781
1782 /*
1783  * Encode CREATE request
1784  */
1785 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1786 {
1787         struct xdr_stream xdr;
1788         struct compound_hdr hdr = {
1789                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1790         };
1791
1792         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793         encode_compound_hdr(&xdr, req, &hdr);
1794         encode_sequence(&xdr, &args->seq_args, &hdr);
1795         encode_putfh(&xdr, args->dir_fh, &hdr);
1796         encode_savefh(&xdr, &hdr);
1797         encode_create(&xdr, args, &hdr);
1798         encode_getfh(&xdr, &hdr);
1799         encode_getfattr(&xdr, args->bitmask, &hdr);
1800         encode_restorefh(&xdr, &hdr);
1801         encode_getfattr(&xdr, args->bitmask, &hdr);
1802         encode_nops(&hdr);
1803         return 0;
1804 }
1805
1806 /*
1807  * Encode SYMLINK request
1808  */
1809 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1810 {
1811         return nfs4_xdr_enc_create(req, p, args);
1812 }
1813
1814 /*
1815  * Encode GETATTR request
1816  */
1817 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1818 {
1819         struct xdr_stream xdr;
1820         struct compound_hdr hdr = {
1821                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1822         };
1823
1824         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1825         encode_compound_hdr(&xdr, req, &hdr);
1826         encode_sequence(&xdr, &args->seq_args, &hdr);
1827         encode_putfh(&xdr, args->fh, &hdr);
1828         encode_getfattr(&xdr, args->bitmask, &hdr);
1829         encode_nops(&hdr);
1830         return 0;
1831 }
1832
1833 /*
1834  * Encode a CLOSE request
1835  */
1836 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1837 {
1838         struct xdr_stream xdr;
1839         struct compound_hdr hdr = {
1840                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1841         };
1842
1843         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844         encode_compound_hdr(&xdr, req, &hdr);
1845         encode_sequence(&xdr, &args->seq_args, &hdr);
1846         encode_putfh(&xdr, args->fh, &hdr);
1847         encode_close(&xdr, args, &hdr);
1848         encode_getfattr(&xdr, args->bitmask, &hdr);
1849         encode_nops(&hdr);
1850         return 0;
1851 }
1852
1853 /*
1854  * Encode an OPEN request
1855  */
1856 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1857 {
1858         struct xdr_stream xdr;
1859         struct compound_hdr hdr = {
1860                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1861         };
1862
1863         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1864         encode_compound_hdr(&xdr, req, &hdr);
1865         encode_sequence(&xdr, &args->seq_args, &hdr);
1866         encode_putfh(&xdr, args->fh, &hdr);
1867         encode_savefh(&xdr, &hdr);
1868         encode_open(&xdr, args, &hdr);
1869         encode_getfh(&xdr, &hdr);
1870         encode_getfattr(&xdr, args->bitmask, &hdr);
1871         encode_restorefh(&xdr, &hdr);
1872         encode_getfattr(&xdr, args->bitmask, &hdr);
1873         encode_nops(&hdr);
1874         return 0;
1875 }
1876
1877 /*
1878  * Encode an OPEN_CONFIRM request
1879  */
1880 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1881 {
1882         struct xdr_stream xdr;
1883         struct compound_hdr hdr = {
1884                 .nops   = 0,
1885         };
1886
1887         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1888         encode_compound_hdr(&xdr, req, &hdr);
1889         encode_putfh(&xdr, args->fh, &hdr);
1890         encode_open_confirm(&xdr, args, &hdr);
1891         encode_nops(&hdr);
1892         return 0;
1893 }
1894
1895 /*
1896  * Encode an OPEN request with no attributes.
1897  */
1898 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1899 {
1900         struct xdr_stream xdr;
1901         struct compound_hdr hdr = {
1902                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1903         };
1904
1905         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1906         encode_compound_hdr(&xdr, req, &hdr);
1907         encode_sequence(&xdr, &args->seq_args, &hdr);
1908         encode_putfh(&xdr, args->fh, &hdr);
1909         encode_open(&xdr, args, &hdr);
1910         encode_getfattr(&xdr, args->bitmask, &hdr);
1911         encode_nops(&hdr);
1912         return 0;
1913 }
1914
1915 /*
1916  * Encode an OPEN_DOWNGRADE request
1917  */
1918 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1919 {
1920         struct xdr_stream xdr;
1921         struct compound_hdr hdr = {
1922                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1923         };
1924
1925         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1926         encode_compound_hdr(&xdr, req, &hdr);
1927         encode_sequence(&xdr, &args->seq_args, &hdr);
1928         encode_putfh(&xdr, args->fh, &hdr);
1929         encode_open_downgrade(&xdr, args, &hdr);
1930         encode_getfattr(&xdr, args->bitmask, &hdr);
1931         encode_nops(&hdr);
1932         return 0;
1933 }
1934
1935 /*
1936  * Encode a LOCK request
1937  */
1938 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1939 {
1940         struct xdr_stream xdr;
1941         struct compound_hdr hdr = {
1942                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1943         };
1944
1945         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1946         encode_compound_hdr(&xdr, req, &hdr);
1947         encode_sequence(&xdr, &args->seq_args, &hdr);
1948         encode_putfh(&xdr, args->fh, &hdr);
1949         encode_lock(&xdr, args, &hdr);
1950         encode_nops(&hdr);
1951         return 0;
1952 }
1953
1954 /*
1955  * Encode a LOCKT request
1956  */
1957 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1958 {
1959         struct xdr_stream xdr;
1960         struct compound_hdr hdr = {
1961                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1962         };
1963
1964         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1965         encode_compound_hdr(&xdr, req, &hdr);
1966         encode_sequence(&xdr, &args->seq_args, &hdr);
1967         encode_putfh(&xdr, args->fh, &hdr);
1968         encode_lockt(&xdr, args, &hdr);
1969         encode_nops(&hdr);
1970         return 0;
1971 }
1972
1973 /*
1974  * Encode a LOCKU request
1975  */
1976 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1977 {
1978         struct xdr_stream xdr;
1979         struct compound_hdr hdr = {
1980                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1981         };
1982
1983         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1984         encode_compound_hdr(&xdr, req, &hdr);
1985         encode_sequence(&xdr, &args->seq_args, &hdr);
1986         encode_putfh(&xdr, args->fh, &hdr);
1987         encode_locku(&xdr, args, &hdr);
1988         encode_nops(&hdr);
1989         return 0;
1990 }
1991
1992 /*
1993  * Encode a READLINK request
1994  */
1995 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1996 {
1997         struct xdr_stream xdr;
1998         struct compound_hdr hdr = {
1999                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2000         };
2001
2002         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2003         encode_compound_hdr(&xdr, req, &hdr);
2004         encode_sequence(&xdr, &args->seq_args, &hdr);
2005         encode_putfh(&xdr, args->fh, &hdr);
2006         encode_readlink(&xdr, args, req, &hdr);
2007
2008         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2009                         args->pgbase, args->pglen);
2010         encode_nops(&hdr);
2011         return 0;
2012 }
2013
2014 /*
2015  * Encode a READDIR request
2016  */
2017 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2018 {
2019         struct xdr_stream xdr;
2020         struct compound_hdr hdr = {
2021                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022         };
2023
2024         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2025         encode_compound_hdr(&xdr, req, &hdr);
2026         encode_sequence(&xdr, &args->seq_args, &hdr);
2027         encode_putfh(&xdr, args->fh, &hdr);
2028         encode_readdir(&xdr, args, req, &hdr);
2029
2030         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2031                          args->pgbase, args->count);
2032         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2033                         __func__, hdr.replen << 2, args->pages,
2034                         args->pgbase, args->count);
2035         encode_nops(&hdr);
2036         return 0;
2037 }
2038
2039 /*
2040  * Encode a READ request
2041  */
2042 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2043 {
2044         struct xdr_stream xdr;
2045         struct compound_hdr hdr = {
2046                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2047         };
2048
2049         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2050         encode_compound_hdr(&xdr, req, &hdr);
2051         encode_sequence(&xdr, &args->seq_args, &hdr);
2052         encode_putfh(&xdr, args->fh, &hdr);
2053         encode_read(&xdr, args, &hdr);
2054
2055         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2056                          args->pages, args->pgbase, args->count);
2057         req->rq_rcv_buf.flags |= XDRBUF_READ;
2058         encode_nops(&hdr);
2059         return 0;
2060 }
2061
2062 /*
2063  * Encode an SETATTR request
2064  */
2065 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2066 {
2067         struct xdr_stream xdr;
2068         struct compound_hdr hdr = {
2069                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070         };
2071
2072         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073         encode_compound_hdr(&xdr, req, &hdr);
2074         encode_sequence(&xdr, &args->seq_args, &hdr);
2075         encode_putfh(&xdr, args->fh, &hdr);
2076         encode_setattr(&xdr, args, args->server, &hdr);
2077         encode_getfattr(&xdr, args->bitmask, &hdr);
2078         encode_nops(&hdr);
2079         return 0;
2080 }
2081
2082 /*
2083  * Encode a GETACL request
2084  */
2085 static int
2086 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2087                 struct nfs_getaclargs *args)
2088 {
2089         struct xdr_stream xdr;
2090         struct compound_hdr hdr = {
2091                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2092         };
2093         uint32_t replen;
2094
2095         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2096         encode_compound_hdr(&xdr, req, &hdr);
2097         encode_sequence(&xdr, &args->seq_args, &hdr);
2098         encode_putfh(&xdr, args->fh, &hdr);
2099         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2100         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2101
2102         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2103                 args->acl_pages, args->acl_pgbase, args->acl_len);
2104         encode_nops(&hdr);
2105         return 0;
2106 }
2107
2108 /*
2109  * Encode a WRITE request
2110  */
2111 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2112 {
2113         struct xdr_stream xdr;
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2119         encode_compound_hdr(&xdr, req, &hdr);
2120         encode_sequence(&xdr, &args->seq_args, &hdr);
2121         encode_putfh(&xdr, args->fh, &hdr);
2122         encode_write(&xdr, args, &hdr);
2123         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2124         encode_getfattr(&xdr, args->bitmask, &hdr);
2125         encode_nops(&hdr);
2126         return 0;
2127 }
2128
2129 /*
2130  *  a COMMIT request
2131  */
2132 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2133 {
2134         struct xdr_stream xdr;
2135         struct compound_hdr hdr = {
2136                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137         };
2138
2139         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140         encode_compound_hdr(&xdr, req, &hdr);
2141         encode_sequence(&xdr, &args->seq_args, &hdr);
2142         encode_putfh(&xdr, args->fh, &hdr);
2143         encode_commit(&xdr, args, &hdr);
2144         encode_getfattr(&xdr, args->bitmask, &hdr);
2145         encode_nops(&hdr);
2146         return 0;
2147 }
2148
2149 /*
2150  * FSINFO request
2151  */
2152 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2153 {
2154         struct xdr_stream xdr;
2155         struct compound_hdr hdr = {
2156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157         };
2158
2159         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2160         encode_compound_hdr(&xdr, req, &hdr);
2161         encode_sequence(&xdr, &args->seq_args, &hdr);
2162         encode_putfh(&xdr, args->fh, &hdr);
2163         encode_fsinfo(&xdr, args->bitmask, &hdr);
2164         encode_nops(&hdr);
2165         return 0;
2166 }
2167
2168 /*
2169  * a PATHCONF request
2170  */
2171 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2172 {
2173         struct xdr_stream xdr;
2174         struct compound_hdr hdr = {
2175                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176         };
2177
2178         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2179         encode_compound_hdr(&xdr, req, &hdr);
2180         encode_sequence(&xdr, &args->seq_args, &hdr);
2181         encode_putfh(&xdr, args->fh, &hdr);
2182         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2183                            &hdr);
2184         encode_nops(&hdr);
2185         return 0;
2186 }
2187
2188 /*
2189  * a STATFS request
2190  */
2191 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2192 {
2193         struct xdr_stream xdr;
2194         struct compound_hdr hdr = {
2195                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196         };
2197
2198         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2199         encode_compound_hdr(&xdr, req, &hdr);
2200         encode_sequence(&xdr, &args->seq_args, &hdr);
2201         encode_putfh(&xdr, args->fh, &hdr);
2202         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2203                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2204         encode_nops(&hdr);
2205         return 0;
2206 }
2207
2208 /*
2209  * GETATTR_BITMAP request
2210  */
2211 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2212                                     struct nfs4_server_caps_arg *args)
2213 {
2214         struct xdr_stream xdr;
2215         struct compound_hdr hdr = {
2216                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217         };
2218
2219         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2220         encode_compound_hdr(&xdr, req, &hdr);
2221         encode_sequence(&xdr, &args->seq_args, &hdr);
2222         encode_putfh(&xdr, args->fhandle, &hdr);
2223         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2224                            FATTR4_WORD0_LINK_SUPPORT|
2225                            FATTR4_WORD0_SYMLINK_SUPPORT|
2226                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2227         encode_nops(&hdr);
2228         return 0;
2229 }
2230
2231 /*
2232  * a RENEW request
2233  */
2234 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2235 {
2236         struct xdr_stream xdr;
2237         struct compound_hdr hdr = {
2238                 .nops   = 0,
2239         };
2240
2241         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2242         encode_compound_hdr(&xdr, req, &hdr);
2243         encode_renew(&xdr, clp, &hdr);
2244         encode_nops(&hdr);
2245         return 0;
2246 }
2247
2248 /*
2249  * a SETCLIENTID request
2250  */
2251 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2252 {
2253         struct xdr_stream xdr;
2254         struct compound_hdr hdr = {
2255                 .nops   = 0,
2256         };
2257
2258         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2259         encode_compound_hdr(&xdr, req, &hdr);
2260         encode_setclientid(&xdr, sc, &hdr);
2261         encode_nops(&hdr);
2262         return 0;
2263 }
2264
2265 /*
2266  * a SETCLIENTID_CONFIRM request
2267  */
2268 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2269 {
2270         struct xdr_stream xdr;
2271         struct compound_hdr hdr = {
2272                 .nops   = 0,
2273         };
2274         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2275
2276         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2277         encode_compound_hdr(&xdr, req, &hdr);
2278         encode_setclientid_confirm(&xdr, clp, &hdr);
2279         encode_putrootfh(&xdr, &hdr);
2280         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2281         encode_nops(&hdr);
2282         return 0;
2283 }
2284
2285 /*
2286  * DELEGRETURN request
2287  */
2288 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2289 {
2290         struct xdr_stream xdr;
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2296         encode_compound_hdr(&xdr, req, &hdr);
2297         encode_sequence(&xdr, &args->seq_args, &hdr);
2298         encode_putfh(&xdr, args->fhandle, &hdr);
2299         encode_delegreturn(&xdr, args->stateid, &hdr);
2300         encode_getfattr(&xdr, args->bitmask, &hdr);
2301         encode_nops(&hdr);
2302         return 0;
2303 }
2304
2305 /*
2306  * Encode FS_LOCATIONS request
2307  */
2308 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2309 {
2310         struct xdr_stream xdr;
2311         struct compound_hdr hdr = {
2312                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313         };
2314         uint32_t replen;
2315
2316         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2317         encode_compound_hdr(&xdr, req, &hdr);
2318         encode_sequence(&xdr, &args->seq_args, &hdr);
2319         encode_putfh(&xdr, args->dir_fh, &hdr);
2320         encode_lookup(&xdr, args->name, &hdr);
2321         replen = hdr.replen;    /* get the attribute into args->page */
2322         encode_fs_locations(&xdr, args->bitmask, &hdr);
2323
2324         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2325                         0, PAGE_SIZE);
2326         encode_nops(&hdr);
2327         return 0;
2328 }
2329
2330 #if defined(CONFIG_NFS_V4_1)
2331 /*
2332  * EXCHANGE_ID request
2333  */
2334 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2335                                     struct nfs41_exchange_id_args *args)
2336 {
2337         struct xdr_stream xdr;
2338         struct compound_hdr hdr = {
2339                 .minorversion = args->client->cl_minorversion,
2340         };
2341
2342         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2343         encode_compound_hdr(&xdr, req, &hdr);
2344         encode_exchange_id(&xdr, args, &hdr);
2345         encode_nops(&hdr);
2346         return 0;
2347 }
2348
2349 /*
2350  * a CREATE_SESSION request
2351  */
2352 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2353                                        struct nfs41_create_session_args *args)
2354 {
2355         struct xdr_stream xdr;
2356         struct compound_hdr hdr = {
2357                 .minorversion = args->client->cl_minorversion,
2358         };
2359
2360         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2361         encode_compound_hdr(&xdr, req, &hdr);
2362         encode_create_session(&xdr, args, &hdr);
2363         encode_nops(&hdr);
2364         return 0;
2365 }
2366
2367 /*
2368  * a DESTROY_SESSION request
2369  */
2370 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2371                                         struct nfs4_session *session)
2372 {
2373         struct xdr_stream xdr;
2374         struct compound_hdr hdr = {
2375                 .minorversion = session->clp->cl_minorversion,
2376         };
2377
2378         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2379         encode_compound_hdr(&xdr, req, &hdr);
2380         encode_destroy_session(&xdr, session, &hdr);
2381         encode_nops(&hdr);
2382         return 0;
2383 }
2384
2385 /*
2386  * a SEQUENCE request
2387  */
2388 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2389                                  struct nfs4_sequence_args *args)
2390 {
2391         struct xdr_stream xdr;
2392         struct compound_hdr hdr = {
2393                 .minorversion = nfs4_xdr_minorversion(args),
2394         };
2395
2396         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2397         encode_compound_hdr(&xdr, req, &hdr);
2398         encode_sequence(&xdr, args, &hdr);
2399         encode_nops(&hdr);
2400         return 0;
2401 }
2402
2403 /*
2404  * a GET_LEASE_TIME request
2405  */
2406 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2407                                        struct nfs4_get_lease_time_args *args)
2408 {
2409         struct xdr_stream xdr;
2410         struct compound_hdr hdr = {
2411                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2412         };
2413         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2414
2415         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2416         encode_compound_hdr(&xdr, req, &hdr);
2417         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2418         encode_putrootfh(&xdr, &hdr);
2419         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2420         encode_nops(&hdr);
2421         return 0;
2422 }
2423 #endif /* CONFIG_NFS_V4_1 */
2424
2425 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2426 {
2427         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2428                 "Remaining buffer length is %tu words.\n",
2429                 func, xdr->end - xdr->p);
2430 }
2431
2432 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2433 {
2434         __be32 *p;
2435
2436         p = xdr_inline_decode(xdr, 4);
2437         if (unlikely(!p))
2438                 goto out_overflow;
2439         *len = be32_to_cpup(p);
2440         p = xdr_inline_decode(xdr, *len);
2441         if (unlikely(!p))
2442                 goto out_overflow;
2443         *string = (char *)p;
2444         return 0;
2445 out_overflow:
2446         print_overflow_msg(__func__, xdr);
2447         return -EIO;
2448 }
2449
2450 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2451 {
2452         __be32 *p;
2453
2454         p = xdr_inline_decode(xdr, 8);
2455         if (unlikely(!p))
2456                 goto out_overflow;
2457         hdr->status = be32_to_cpup(p++);
2458         hdr->taglen = be32_to_cpup(p);
2459
2460         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2461         if (unlikely(!p))
2462                 goto out_overflow;
2463         hdr->tag = (char *)p;
2464         p += XDR_QUADLEN(hdr->taglen);
2465         hdr->nops = be32_to_cpup(p);
2466         if (unlikely(hdr->nops < 1))
2467                 return nfs4_stat_to_errno(hdr->status);
2468         return 0;
2469 out_overflow:
2470         print_overflow_msg(__func__, xdr);
2471         return -EIO;
2472 }
2473
2474 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2475 {
2476         __be32 *p;
2477         uint32_t opnum;
2478         int32_t nfserr;
2479
2480         p = xdr_inline_decode(xdr, 8);
2481         if (unlikely(!p))
2482                 goto out_overflow;
2483         opnum = be32_to_cpup(p++);
2484         if (opnum != expected) {
2485                 dprintk("nfs: Server returned operation"
2486                         " %d but we issued a request for %d\n",
2487                                 opnum, expected);
2488                 return -EIO;
2489         }
2490         nfserr = be32_to_cpup(p);
2491         if (nfserr != NFS_OK)
2492                 return nfs4_stat_to_errno(nfserr);
2493         return 0;
2494 out_overflow:
2495         print_overflow_msg(__func__, xdr);
2496         return -EIO;
2497 }
2498
2499 /* Dummy routine */
2500 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2501 {
2502         __be32 *p;
2503         unsigned int strlen;
2504         char *str;
2505
2506         p = xdr_inline_decode(xdr, 12);
2507         if (likely(p))
2508                 return decode_opaque_inline(xdr, &strlen, &str);
2509         print_overflow_msg(__func__, xdr);
2510         return -EIO;
2511 }
2512
2513 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2514 {
2515         uint32_t bmlen;
2516         __be32 *p;
2517
2518         p = xdr_inline_decode(xdr, 4);
2519         if (unlikely(!p))
2520                 goto out_overflow;
2521         bmlen = be32_to_cpup(p);
2522
2523         bitmap[0] = bitmap[1] = 0;
2524         p = xdr_inline_decode(xdr, (bmlen << 2));
2525         if (unlikely(!p))
2526                 goto out_overflow;
2527         if (bmlen > 0) {
2528                 bitmap[0] = be32_to_cpup(p++);
2529                 if (bmlen > 1)
2530                         bitmap[1] = be32_to_cpup(p);
2531         }
2532         return 0;
2533 out_overflow:
2534         print_overflow_msg(__func__, xdr);
2535         return -EIO;
2536 }
2537
2538 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2539 {
2540         __be32 *p;
2541
2542         p = xdr_inline_decode(xdr, 4);
2543         if (unlikely(!p))
2544                 goto out_overflow;
2545         *attrlen = be32_to_cpup(p);
2546         *savep = xdr->p;
2547         return 0;
2548 out_overflow:
2549         print_overflow_msg(__func__, xdr);
2550         return -EIO;
2551 }
2552
2553 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2554 {
2555         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2556                 decode_attr_bitmap(xdr, bitmask);
2557                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2558         } else
2559                 bitmask[0] = bitmask[1] = 0;
2560         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2561         return 0;
2562 }
2563
2564 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2565 {
2566         __be32 *p;
2567         int ret = 0;
2568
2569         *type = 0;
2570         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2571                 return -EIO;
2572         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2573                 p = xdr_inline_decode(xdr, 4);
2574                 if (unlikely(!p))
2575                         goto out_overflow;
2576                 *type = be32_to_cpup(p);
2577                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2578                         dprintk("%s: bad type %d\n", __func__, *type);
2579                         return -EIO;
2580                 }
2581                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2582                 ret = NFS_ATTR_FATTR_TYPE;
2583         }
2584         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2585         return ret;
2586 out_overflow:
2587         print_overflow_msg(__func__, xdr);
2588         return -EIO;
2589 }
2590
2591 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2592 {
2593         __be32 *p;
2594         int ret = 0;
2595
2596         *change = 0;
2597         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2598                 return -EIO;
2599         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2600                 p = xdr_inline_decode(xdr, 8);
2601                 if (unlikely(!p))
2602                         goto out_overflow;
2603                 xdr_decode_hyper(p, change);
2604                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2605                 ret = NFS_ATTR_FATTR_CHANGE;
2606         }
2607         dprintk("%s: change attribute=%Lu\n", __func__,
2608                         (unsigned long long)*change);
2609         return ret;
2610 out_overflow:
2611         print_overflow_msg(__func__, xdr);
2612         return -EIO;
2613 }
2614
2615 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2616 {
2617         __be32 *p;
2618         int ret = 0;
2619
2620         *size = 0;
2621         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2622                 return -EIO;
2623         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2624                 p = xdr_inline_decode(xdr, 8);
2625                 if (unlikely(!p))
2626                         goto out_overflow;
2627                 xdr_decode_hyper(p, size);
2628                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2629                 ret = NFS_ATTR_FATTR_SIZE;
2630         }
2631         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2632         return ret;
2633 out_overflow:
2634         print_overflow_msg(__func__, xdr);
2635         return -EIO;
2636 }
2637
2638 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2639 {
2640         __be32 *p;
2641
2642         *res = 0;
2643         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2644                 return -EIO;
2645         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2646                 p = xdr_inline_decode(xdr, 4);
2647                 if (unlikely(!p))
2648                         goto out_overflow;
2649                 *res = be32_to_cpup(p);
2650                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2651         }
2652         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2653         return 0;
2654 out_overflow:
2655         print_overflow_msg(__func__, xdr);
2656         return -EIO;
2657 }
2658
2659 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2660 {
2661         __be32 *p;
2662
2663         *res = 0;
2664         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2665                 return -EIO;
2666         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2667                 p = xdr_inline_decode(xdr, 4);
2668                 if (unlikely(!p))
2669                         goto out_overflow;
2670                 *res = be32_to_cpup(p);
2671                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2672         }
2673         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2674         return 0;
2675 out_overflow:
2676         print_overflow_msg(__func__, xdr);
2677         return -EIO;
2678 }
2679
2680 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2681 {
2682         __be32 *p;
2683         int ret = 0;
2684
2685         fsid->major = 0;
2686         fsid->minor = 0;
2687         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2688                 return -EIO;
2689         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2690                 p = xdr_inline_decode(xdr, 16);
2691                 if (unlikely(!p))
2692                         goto out_overflow;
2693                 p = xdr_decode_hyper(p, &fsid->major);
2694                 xdr_decode_hyper(p, &fsid->minor);
2695                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2696                 ret = NFS_ATTR_FATTR_FSID;
2697         }
2698         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2699                         (unsigned long long)fsid->major,
2700                         (unsigned long long)fsid->minor);
2701         return ret;
2702 out_overflow:
2703         print_overflow_msg(__func__, xdr);
2704         return -EIO;
2705 }
2706
2707 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2708 {
2709         __be32 *p;
2710
2711         *res = 60;
2712         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2713                 return -EIO;
2714         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2715                 p = xdr_inline_decode(xdr, 4);
2716                 if (unlikely(!p))
2717                         goto out_overflow;
2718                 *res = be32_to_cpup(p);
2719                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2720         }
2721         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2722         return 0;
2723 out_overflow:
2724         print_overflow_msg(__func__, xdr);
2725         return -EIO;
2726 }
2727
2728 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2729 {
2730         __be32 *p;
2731
2732         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2733         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2734                 return -EIO;
2735         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2736                 p = xdr_inline_decode(xdr, 4);
2737                 if (unlikely(!p))
2738                         goto out_overflow;
2739                 *res = be32_to_cpup(p);
2740                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2741         }
2742         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2743         return 0;
2744 out_overflow:
2745         print_overflow_msg(__func__, xdr);
2746         return -EIO;
2747 }
2748
2749 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2750 {
2751         __be32 *p;
2752         int ret = 0;
2753
2754         *fileid = 0;
2755         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2756                 return -EIO;
2757         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2758                 p = xdr_inline_decode(xdr, 8);
2759                 if (unlikely(!p))
2760                         goto out_overflow;
2761                 xdr_decode_hyper(p, fileid);
2762                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2763                 ret = NFS_ATTR_FATTR_FILEID;
2764         }
2765         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2766         return ret;
2767 out_overflow:
2768         print_overflow_msg(__func__, xdr);
2769         return -EIO;
2770 }
2771
2772 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2773 {
2774         __be32 *p;
2775         int ret = 0;
2776
2777         *fileid = 0;
2778         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2779                 return -EIO;
2780         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2781                 p = xdr_inline_decode(xdr, 8);
2782                 if (unlikely(!p))
2783                         goto out_overflow;
2784                 xdr_decode_hyper(p, fileid);
2785                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2786                 ret = NFS_ATTR_FATTR_FILEID;
2787         }
2788         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2789         return ret;
2790 out_overflow:
2791         print_overflow_msg(__func__, xdr);
2792         return -EIO;
2793 }
2794
2795 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2796 {
2797         __be32 *p;
2798         int status = 0;
2799
2800         *res = 0;
2801         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2802                 return -EIO;
2803         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2804                 p = xdr_inline_decode(xdr, 8);
2805                 if (unlikely(!p))
2806                         goto out_overflow;
2807                 xdr_decode_hyper(p, res);
2808                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2809         }
2810         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2811         return status;
2812 out_overflow:
2813         print_overflow_msg(__func__, xdr);
2814         return -EIO;
2815 }
2816
2817 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2818 {
2819         __be32 *p;
2820         int status = 0;
2821
2822         *res = 0;
2823         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2824                 return -EIO;
2825         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2826                 p = xdr_inline_decode(xdr, 8);
2827                 if (unlikely(!p))
2828                         goto out_overflow;
2829                 xdr_decode_hyper(p, res);
2830                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2831         }
2832         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2833         return status;
2834 out_overflow:
2835         print_overflow_msg(__func__, xdr);
2836         return -EIO;
2837 }
2838
2839 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2840 {
2841         __be32 *p;
2842         int status = 0;
2843
2844         *res = 0;
2845         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2846                 return -EIO;
2847         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2848                 p = xdr_inline_decode(xdr, 8);
2849                 if (unlikely(!p))
2850                         goto out_overflow;
2851                 xdr_decode_hyper(p, res);
2852                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2853         }
2854         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2855         return status;
2856 out_overflow:
2857         print_overflow_msg(__func__, xdr);
2858         return -EIO;
2859 }
2860
2861 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2862 {
2863         u32 n;
2864         __be32 *p;
2865         int status = 0;
2866
2867         p = xdr_inline_decode(xdr, 4);
2868         if (unlikely(!p))
2869                 goto out_overflow;
2870         n = be32_to_cpup(p);
2871         if (n == 0)
2872                 goto root_path;
2873         dprintk("path ");
2874         path->ncomponents = 0;
2875         while (path->ncomponents < n) {
2876                 struct nfs4_string *component = &path->components[path->ncomponents];
2877                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2878                 if (unlikely(status != 0))
2879                         goto out_eio;
2880                 if (path->ncomponents != n)
2881                         dprintk("/");
2882                 dprintk("%s", component->data);
2883                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2884                         path->ncomponents++;
2885                 else {
2886                         dprintk("cannot parse %d components in path\n", n);
2887                         goto out_eio;
2888                 }
2889         }
2890 out:
2891         dprintk("\n");
2892         return status;
2893 root_path:
2894 /* a root pathname is sent as a zero component4 */
2895         path->ncomponents = 1;
2896         path->components[0].len=0;
2897         path->components[0].data=NULL;
2898         dprintk("path /\n");
2899         goto out;
2900 out_eio:
2901         dprintk(" status %d", status);
2902         status = -EIO;
2903         goto out;
2904 out_overflow:
2905         print_overflow_msg(__func__, xdr);
2906         return -EIO;
2907 }
2908
2909 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2910 {
2911         int n;
2912         __be32 *p;
2913         int status = -EIO;
2914
2915         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2916                 goto out;
2917         status = 0;
2918         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2919                 goto out;
2920         dprintk("%s: fsroot ", __func__);
2921         status = decode_pathname(xdr, &res->fs_path);
2922         if (unlikely(status != 0))
2923                 goto out;
2924         p = xdr_inline_decode(xdr, 4);
2925         if (unlikely(!p))
2926                 goto out_overflow;
2927         n = be32_to_cpup(p);
2928         if (n <= 0)
2929                 goto out_eio;
2930         res->nlocations = 0;
2931         while (res->nlocations < n) {
2932                 u32 m;
2933                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2934
2935                 p = xdr_inline_decode(xdr, 4);
2936                 if (unlikely(!p))
2937                         goto out_overflow;
2938                 m = be32_to_cpup(p);
2939
2940                 loc->nservers = 0;
2941                 dprintk("%s: servers ", __func__);
2942                 while (loc->nservers < m) {
2943                         struct nfs4_string *server = &loc->servers[loc->nservers];
2944                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2945                         if (unlikely(status != 0))
2946                                 goto out_eio;
2947                         dprintk("%s ", server->data);
2948                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2949                                 loc->nservers++;
2950                         else {
2951                                 unsigned int i;
2952                                 dprintk("%s: using first %u of %u servers "
2953                                         "returned for location %u\n",
2954                                                 __func__,
2955                                                 NFS4_FS_LOCATION_MAXSERVERS,
2956                                                 m, res->nlocations);
2957                                 for (i = loc->nservers; i < m; i++) {
2958                                         unsigned int len;
2959                                         char *data;
2960                                         status = decode_opaque_inline(xdr, &len, &data);
2961                                         if (unlikely(status != 0))
2962                                                 goto out_eio;
2963                                 }
2964                         }
2965                 }
2966                 status = decode_pathname(xdr, &loc->rootpath);
2967                 if (unlikely(status != 0))
2968                         goto out_eio;
2969                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2970                         res->nlocations++;
2971         }
2972         if (res->nlocations != 0)
2973                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2974 out:
2975         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2976         return status;
2977 out_overflow:
2978         print_overflow_msg(__func__, xdr);
2979 out_eio:
2980         status = -EIO;
2981         goto out;
2982 }
2983
2984 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2985 {
2986         __be32 *p;
2987         int status = 0;
2988
2989         *res = 0;
2990         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2991                 return -EIO;
2992         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2993                 p = xdr_inline_decode(xdr, 8);
2994                 if (unlikely(!p))
2995                         goto out_overflow;
2996                 xdr_decode_hyper(p, res);
2997                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2998         }
2999         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3000         return status;
3001 out_overflow:
3002         print_overflow_msg(__func__, xdr);
3003         return -EIO;
3004 }
3005
3006 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3007 {
3008         __be32 *p;
3009         int status = 0;
3010
3011         *maxlink = 1;
3012         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3013                 return -EIO;
3014         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3015                 p = xdr_inline_decode(xdr, 4);
3016                 if (unlikely(!p))
3017                         goto out_overflow;
3018                 *maxlink = be32_to_cpup(p);
3019                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3020         }
3021         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3022         return status;
3023 out_overflow:
3024         print_overflow_msg(__func__, xdr);
3025         return -EIO;
3026 }
3027
3028 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3029 {
3030         __be32 *p;
3031         int status = 0;
3032
3033         *maxname = 1024;
3034         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3035                 return -EIO;
3036         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3037                 p = xdr_inline_decode(xdr, 4);
3038                 if (unlikely(!p))
3039                         goto out_overflow;
3040                 *maxname = be32_to_cpup(p);
3041                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3042         }
3043         dprintk("%s: maxname=%u\n", __func__, *maxname);
3044         return status;
3045 out_overflow:
3046         print_overflow_msg(__func__, xdr);
3047         return -EIO;
3048 }
3049
3050 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3051 {
3052         __be32 *p;
3053         int status = 0;
3054
3055         *res = 1024;
3056         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3057                 return -EIO;
3058         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3059                 uint64_t maxread;
3060                 p = xdr_inline_decode(xdr, 8);
3061                 if (unlikely(!p))
3062                         goto out_overflow;
3063                 xdr_decode_hyper(p, &maxread);
3064                 if (maxread > 0x7FFFFFFF)
3065                         maxread = 0x7FFFFFFF;
3066                 *res = (uint32_t)maxread;
3067                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3068         }
3069         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3070         return status;
3071 out_overflow:
3072         print_overflow_msg(__func__, xdr);
3073         return -EIO;
3074 }
3075
3076 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3077 {
3078         __be32 *p;
3079         int status = 0;
3080
3081         *res = 1024;
3082         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3083                 return -EIO;
3084         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3085                 uint64_t maxwrite;
3086                 p = xdr_inline_decode(xdr, 8);
3087                 if (unlikely(!p))
3088                         goto out_overflow;
3089                 xdr_decode_hyper(p, &maxwrite);
3090                 if (maxwrite > 0x7FFFFFFF)
3091                         maxwrite = 0x7FFFFFFF;
3092                 *res = (uint32_t)maxwrite;
3093                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3094         }
3095         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3096         return status;
3097 out_overflow:
3098         print_overflow_msg(__func__, xdr);
3099         return -EIO;
3100 }
3101
3102 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3103 {
3104         uint32_t tmp;
3105         __be32 *p;
3106         int ret = 0;
3107
3108         *mode = 0;
3109         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3110                 return -EIO;
3111         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3112                 p = xdr_inline_decode(xdr, 4);
3113                 if (unlikely(!p))
3114                         goto out_overflow;
3115                 tmp = be32_to_cpup(p);
3116                 *mode = tmp & ~S_IFMT;
3117                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3118                 ret = NFS_ATTR_FATTR_MODE;
3119         }
3120         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3121         return ret;
3122 out_overflow:
3123         print_overflow_msg(__func__, xdr);
3124         return -EIO;
3125 }
3126
3127 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3128 {
3129         __be32 *p;
3130         int ret = 0;
3131
3132         *nlink = 1;
3133         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3134                 return -EIO;
3135         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3136                 p = xdr_inline_decode(xdr, 4);
3137                 if (unlikely(!p))
3138                         goto out_overflow;
3139                 *nlink = be32_to_cpup(p);
3140                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3141                 ret = NFS_ATTR_FATTR_NLINK;
3142         }
3143         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3144         return ret;
3145 out_overflow:
3146         print_overflow_msg(__func__, xdr);
3147         return -EIO;
3148 }
3149
3150 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3151                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3152 {
3153         uint32_t len;
3154         __be32 *p;
3155         int ret = 0;
3156
3157         *uid = -2;
3158         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3159                 return -EIO;
3160         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3161                 p = xdr_inline_decode(xdr, 4);
3162                 if (unlikely(!p))
3163                         goto out_overflow;
3164                 len = be32_to_cpup(p);
3165                 p = xdr_inline_decode(xdr, len);
3166                 if (unlikely(!p))
3167                         goto out_overflow;
3168                 if (!may_sleep) {
3169                         /* do nothing */
3170                 } else if (len < XDR_MAX_NETOBJ) {
3171                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3172                                 ret = NFS_ATTR_FATTR_OWNER;
3173                         else
3174                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3175                                                 __func__);
3176                 } else
3177                         dprintk("%s: name too long (%u)!\n",
3178                                         __func__, len);
3179                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3180         }
3181         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3182         return ret;
3183 out_overflow:
3184         print_overflow_msg(__func__, xdr);
3185         return -EIO;
3186 }
3187
3188 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3189                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3190 {
3191         uint32_t len;
3192         __be32 *p;
3193         int ret = 0;
3194
3195         *gid = -2;
3196         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3197                 return -EIO;
3198         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3199                 p = xdr_inline_decode(xdr, 4);
3200                 if (unlikely(!p))
3201                         goto out_overflow;
3202                 len = be32_to_cpup(p);
3203                 p = xdr_inline_decode(xdr, len);
3204                 if (unlikely(!p))
3205                         goto out_overflow;
3206                 if (!may_sleep) {
3207                         /* do nothing */
3208                 } else if (len < XDR_MAX_NETOBJ) {
3209                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3210                                 ret = NFS_ATTR_FATTR_GROUP;
3211                         else
3212                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3213                                                 __func__);
3214                 } else
3215                         dprintk("%s: name too long (%u)!\n",
3216                                         __func__, len);
3217                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3218         }
3219         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3220         return ret;
3221 out_overflow:
3222         print_overflow_msg(__func__, xdr);
3223         return -EIO;
3224 }
3225
3226 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3227 {
3228         uint32_t major = 0, minor = 0;
3229         __be32 *p;
3230         int ret = 0;
3231
3232         *rdev = MKDEV(0,0);
3233         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3234                 return -EIO;
3235         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3236                 dev_t tmp;
3237
3238                 p = xdr_inline_decode(xdr, 8);
3239                 if (unlikely(!p))
3240                         goto out_overflow;
3241                 major = be32_to_cpup(p++);
3242                 minor = be32_to_cpup(p);
3243                 tmp = MKDEV(major, minor);
3244                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3245                         *rdev = tmp;
3246                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3247                 ret = NFS_ATTR_FATTR_RDEV;
3248         }
3249         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3250         return ret;
3251 out_overflow:
3252         print_overflow_msg(__func__, xdr);
3253         return -EIO;
3254 }
3255
3256 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3257 {
3258         __be32 *p;
3259         int status = 0;
3260
3261         *res = 0;
3262         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3263                 return -EIO;
3264         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3265                 p = xdr_inline_decode(xdr, 8);
3266                 if (unlikely(!p))
3267                         goto out_overflow;
3268                 xdr_decode_hyper(p, res);
3269                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3270         }
3271         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3272         return status;
3273 out_overflow:
3274         print_overflow_msg(__func__, xdr);
3275         return -EIO;
3276 }
3277
3278 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3279 {
3280         __be32 *p;
3281         int status = 0;
3282
3283         *res = 0;
3284         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3285                 return -EIO;
3286         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3287                 p = xdr_inline_decode(xdr, 8);
3288                 if (unlikely(!p))
3289                         goto out_overflow;
3290                 xdr_decode_hyper(p, res);
3291                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3292         }
3293         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3294         return status;
3295 out_overflow:
3296         print_overflow_msg(__func__, xdr);
3297         return -EIO;
3298 }
3299
3300 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3301 {
3302         __be32 *p;
3303         int status = 0;
3304
3305         *res = 0;
3306         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3307                 return -EIO;
3308         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3309                 p = xdr_inline_decode(xdr, 8);
3310                 if (unlikely(!p))
3311                         goto out_overflow;
3312                 xdr_decode_hyper(p, res);
3313                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3314         }
3315         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3316         return status;
3317 out_overflow:
3318         print_overflow_msg(__func__, xdr);
3319         return -EIO;
3320 }
3321
3322 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3323 {
3324         __be32 *p;
3325         int ret = 0;
3326
3327         *used = 0;
3328         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3329                 return -EIO;
3330         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3331                 p = xdr_inline_decode(xdr, 8);
3332                 if (unlikely(!p))
3333                         goto out_overflow;
3334                 xdr_decode_hyper(p, used);
3335                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3336                 ret = NFS_ATTR_FATTR_SPACE_USED;
3337         }
3338         dprintk("%s: space used=%Lu\n", __func__,
3339                         (unsigned long long)*used);
3340         return ret;
3341 out_overflow:
3342         print_overflow_msg(__func__, xdr);
3343         return -EIO;
3344 }
3345
3346 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3347 {
3348         __be32 *p;
3349         uint64_t sec;
3350         uint32_t nsec;
3351
3352         p = xdr_inline_decode(xdr, 12);
3353         if (unlikely(!p))
3354                 goto out_overflow;
3355         p = xdr_decode_hyper(p, &sec);
3356         nsec = be32_to_cpup(p);
3357         time->tv_sec = (time_t)sec;
3358         time->tv_nsec = (long)nsec;
3359         return 0;
3360 out_overflow:
3361         print_overflow_msg(__func__, xdr);
3362         return -EIO;
3363 }
3364
3365 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3366 {
3367         int status = 0;
3368
3369         time->tv_sec = 0;
3370         time->tv_nsec = 0;
3371         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3374                 status = decode_attr_time(xdr, time);
3375                 if (status == 0)
3376                         status = NFS_ATTR_FATTR_ATIME;
3377                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3378         }
3379         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3380         return status;
3381 }
3382
3383 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3384 {
3385         int status = 0;
3386
3387         time->tv_sec = 0;
3388         time->tv_nsec = 0;
3389         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3390                 return -EIO;
3391         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3392                 status = decode_attr_time(xdr, time);
3393                 if (status == 0)
3394                         status = NFS_ATTR_FATTR_CTIME;
3395                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3396         }
3397         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3398         return status;
3399 }
3400
3401 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3402 {
3403         int status = 0;
3404
3405         time->tv_sec = 0;
3406         time->tv_nsec = 0;
3407         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3408                 return -EIO;
3409         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3410                 status = decode_attr_time(xdr, time);
3411                 if (status == 0)
3412                         status = NFS_ATTR_FATTR_MTIME;
3413                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3414         }
3415         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3416         return status;
3417 }
3418
3419 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3420 {
3421         unsigned int attrwords = XDR_QUADLEN(attrlen);
3422         unsigned int nwords = xdr->p - savep;
3423
3424         if (unlikely(attrwords != nwords)) {
3425                 dprintk("%s: server returned incorrect attribute length: "
3426                         "%u %c %u\n",
3427                                 __func__,
3428                                 attrwords << 2,
3429                                 (attrwords < nwords) ? '<' : '>',
3430                                 nwords << 2);
3431                 return -EIO;
3432         }
3433         return 0;
3434 }
3435
3436 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3437 {
3438         __be32 *p;
3439
3440         p = xdr_inline_decode(xdr, 20);
3441         if (unlikely(!p))
3442                 goto out_overflow;
3443         cinfo->atomic = be32_to_cpup(p++);
3444         p = xdr_decode_hyper(p, &cinfo->before);
3445         xdr_decode_hyper(p, &cinfo->after);
3446         return 0;
3447 out_overflow:
3448         print_overflow_msg(__func__, xdr);
3449         return -EIO;
3450 }
3451
3452 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3453 {
3454         __be32 *p;
3455         uint32_t supp, acc;
3456         int status;
3457
3458         status = decode_op_hdr(xdr, OP_ACCESS);
3459         if (status)
3460                 return status;
3461         p = xdr_inline_decode(xdr, 8);
3462         if (unlikely(!p))
3463                 goto out_overflow;
3464         supp = be32_to_cpup(p++);
3465         acc = be32_to_cpup(p);
3466         access->supported = supp;
3467         access->access = acc;
3468         return 0;
3469 out_overflow:
3470         print_overflow_msg(__func__, xdr);
3471         return -EIO;
3472 }
3473
3474 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3475 {
3476         __be32 *p;
3477
3478         p = xdr_inline_decode(xdr, len);
3479         if (likely(p)) {
3480                 memcpy(buf, p, len);
3481                 return 0;
3482         }
3483         print_overflow_msg(__func__, xdr);
3484         return -EIO;
3485 }
3486
3487 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3488 {
3489         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3490 }
3491
3492 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3493 {
3494         int status;
3495
3496         status = decode_op_hdr(xdr, OP_CLOSE);
3497         if (status != -EIO)
3498                 nfs_increment_open_seqid(status, res->seqid);
3499         if (!status)
3500                 status = decode_stateid(xdr, &res->stateid);
3501         return status;
3502 }
3503
3504 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3505 {
3506         return decode_opaque_fixed(xdr, verifier, 8);
3507 }
3508
3509 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3510 {
3511         int status;
3512
3513         status = decode_op_hdr(xdr, OP_COMMIT);
3514         if (!status)
3515                 status = decode_verifier(xdr, res->verf->verifier);
3516         return status;
3517 }
3518
3519 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3520 {
3521         __be32 *p;
3522         uint32_t bmlen;
3523         int status;
3524
3525         status = decode_op_hdr(xdr, OP_CREATE);
3526         if (status)
3527                 return status;
3528         if ((status = decode_change_info(xdr, cinfo)))
3529                 return status;
3530         p = xdr_inline_decode(xdr, 4);
3531         if (unlikely(!p))
3532                 goto out_overflow;
3533         bmlen = be32_to_cpup(p);
3534         p = xdr_inline_decode(xdr, bmlen << 2);
3535         if (likely(p))
3536                 return 0;
3537 out_overflow:
3538         print_overflow_msg(__func__, xdr);
3539         return -EIO;
3540 }
3541
3542 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3543 {
3544         __be32 *savep;
3545         uint32_t attrlen, bitmap[2] = {0};
3546         int status;
3547
3548         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3549                 goto xdr_error;
3550         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3551                 goto xdr_error;
3552         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3553                 goto xdr_error;
3554         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3555                 goto xdr_error;
3556         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3557                 goto xdr_error;
3558         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3559                 goto xdr_error;
3560         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3561                 goto xdr_error;
3562         status = verify_attr_len(xdr, savep, attrlen);
3563 xdr_error:
3564         dprintk("%s: xdr returned %d!\n", __func__, -status);
3565         return status;
3566 }
3567
3568 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3569 {
3570         __be32 *savep;
3571         uint32_t attrlen, bitmap[2] = {0};
3572         int status;
3573
3574         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3575                 goto xdr_error;
3576         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3577                 goto xdr_error;
3578         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3579                 goto xdr_error;
3580
3581         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3582                 goto xdr_error;
3583         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3584                 goto xdr_error;
3585         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3586                 goto xdr_error;
3587         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3588                 goto xdr_error;
3589         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3590                 goto xdr_error;
3591         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3592                 goto xdr_error;
3593
3594         status = verify_attr_len(xdr, savep, attrlen);
3595 xdr_error:
3596         dprintk("%s: xdr returned %d!\n", __func__, -status);
3597         return status;
3598 }
3599
3600 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3601 {
3602         __be32 *savep;
3603         uint32_t attrlen, bitmap[2] = {0};
3604         int status;
3605
3606         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3607                 goto xdr_error;
3608         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3609                 goto xdr_error;
3610         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3611                 goto xdr_error;
3612
3613         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3614                 goto xdr_error;
3615         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3616                 goto xdr_error;
3617
3618         status = verify_attr_len(xdr, savep, attrlen);
3619 xdr_error:
3620         dprintk("%s: xdr returned %d!\n", __func__, -status);
3621         return status;
3622 }
3623
3624 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3625                 const struct nfs_server *server, int may_sleep)
3626 {
3627         __be32 *savep;
3628         uint32_t attrlen,
3629                  bitmap[2] = {0},
3630                  type;
3631         int status;
3632         umode_t fmode = 0;
3633         uint64_t fileid;
3634
3635         status = decode_op_hdr(xdr, OP_GETATTR);
3636         if (status < 0)
3637                 goto xdr_error;
3638
3639         status = decode_attr_bitmap(xdr, bitmap);
3640         if (status < 0)
3641                 goto xdr_error;
3642
3643         status = decode_attr_length(xdr, &attrlen, &savep);
3644         if (status < 0)
3645                 goto xdr_error;
3646
3647
3648         status = decode_attr_type(xdr, bitmap, &type);
3649         if (status < 0)
3650                 goto xdr_error;
3651         fattr->mode = 0;
3652         if (status != 0) {
3653                 fattr->mode |= nfs_type2fmt[type];
3654                 fattr->valid |= status;
3655         }
3656
3657         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3658         if (status < 0)
3659                 goto xdr_error;
3660         fattr->valid |= status;
3661
3662         status = decode_attr_size(xdr, bitmap, &fattr->size);
3663         if (status < 0)
3664                 goto xdr_error;
3665         fattr->valid |= status;
3666
3667         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3668         if (status < 0)
3669                 goto xdr_error;
3670         fattr->valid |= status;
3671
3672         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3673         if (status < 0)
3674                 goto xdr_error;
3675         fattr->valid |= status;
3676
3677         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3678                                                 struct nfs4_fs_locations,
3679                                                 fattr));
3680         if (status < 0)
3681                 goto xdr_error;
3682         fattr->valid |= status;
3683
3684         status = decode_attr_mode(xdr, bitmap, &fmode);
3685         if (status < 0)
3686                 goto xdr_error;
3687         if (status != 0) {
3688                 fattr->mode |= fmode;
3689                 fattr->valid |= status;
3690         }
3691
3692         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3693         if (status < 0)
3694                 goto xdr_error;
3695         fattr->valid |= status;
3696
3697         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3698                         &fattr->uid, may_sleep);
3699         if (status < 0)
3700                 goto xdr_error;
3701         fattr->valid |= status;
3702
3703         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3704                         &fattr->gid, may_sleep);
3705         if (status < 0)
3706                 goto xdr_error;
3707         fattr->valid |= status;
3708
3709         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3710         if (status < 0)
3711                 goto xdr_error;
3712         fattr->valid |= status;
3713
3714         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3715         if (status < 0)
3716                 goto xdr_error;
3717         fattr->valid |= status;
3718
3719         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3720         if (status < 0)
3721                 goto xdr_error;
3722         fattr->valid |= status;
3723
3724         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3725         if (status < 0)
3726                 goto xdr_error;
3727         fattr->valid |= status;
3728
3729         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3730         if (status < 0)
3731                 goto xdr_error;
3732         fattr->valid |= status;
3733
3734         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3735         if (status < 0)
3736                 goto xdr_error;
3737         if (status != 0 && !(fattr->valid & status)) {
3738                 fattr->fileid = fileid;
3739                 fattr->valid |= status;
3740         }
3741
3742         status = verify_attr_len(xdr, savep, attrlen);
3743 xdr_error:
3744         dprintk("%s: xdr returned %d\n", __func__, -status);
3745         return status;
3746 }
3747
3748
3749 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3750 {
3751         __be32 *savep;
3752         uint32_t attrlen, bitmap[2];
3753         int status;
3754
3755         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3756                 goto xdr_error;
3757         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3758                 goto xdr_error;
3759         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3760                 goto xdr_error;
3761
3762         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3763
3764         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3765                 goto xdr_error;
3766         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3767                 goto xdr_error;
3768         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3769                 goto xdr_error;
3770         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3771         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3772                 goto xdr_error;
3773         fsinfo->wtpref = fsinfo->wtmax;
3774
3775         status = verify_attr_len(xdr, savep, attrlen);
3776 xdr_error:
3777         dprintk("%s: xdr returned %d!\n", __func__, -status);
3778         return status;
3779 }
3780
3781 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3782 {
3783         __be32 *p;
3784         uint32_t len;
3785         int status;
3786
3787         /* Zero handle first to allow comparisons */
3788         memset(fh, 0, sizeof(*fh));
3789
3790         status = decode_op_hdr(xdr, OP_GETFH);
3791         if (status)
3792                 return status;
3793
3794         p = xdr_inline_decode(xdr, 4);
3795         if (unlikely(!p))
3796                 goto out_overflow;
3797         len = be32_to_cpup(p);
3798         if (len > NFS4_FHSIZE)
3799                 return -EIO;
3800         fh->size = len;
3801         p = xdr_inline_decode(xdr, len);
3802         if (unlikely(!p))
3803                 goto out_overflow;
3804         memcpy(fh->data, p, len);
3805         return 0;
3806 out_overflow:
3807         print_overflow_msg(__func__, xdr);
3808         return -EIO;
3809 }
3810
3811 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3812 {
3813         int status;
3814
3815         status = decode_op_hdr(xdr, OP_LINK);
3816         if (status)
3817                 return status;
3818         return decode_change_info(xdr, cinfo);
3819 }
3820
3821 /*
3822  * We create the owner, so we know a proper owner.id length is 4.
3823  */
3824 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3825 {
3826         uint64_t offset, length, clientid;
3827         __be32 *p;
3828         uint32_t namelen, type;
3829
3830         p = xdr_inline_decode(xdr, 32);
3831         if (unlikely(!p))
3832                 goto out_overflow;
3833         p = xdr_decode_hyper(p, &offset);
3834         p = xdr_decode_hyper(p, &length);
3835         type = be32_to_cpup(p++);
3836         if (fl != NULL) {
3837                 fl->fl_start = (loff_t)offset;
3838                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3839                 if (length == ~(uint64_t)0)
3840                         fl->fl_end = OFFSET_MAX;
3841                 fl->fl_type = F_WRLCK;
3842                 if (type & 1)
3843                         fl->fl_type = F_RDLCK;
3844                 fl->fl_pid = 0;
3845         }
3846         p = xdr_decode_hyper(p, &clientid);
3847         namelen = be32_to_cpup(p);
3848         p = xdr_inline_decode(xdr, namelen);
3849         if (likely(p))
3850                 return -NFS4ERR_DENIED;
3851 out_overflow:
3852         print_overflow_msg(__func__, xdr);
3853         return -EIO;
3854 }
3855
3856 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3857 {
3858         int status;
3859
3860         status = decode_op_hdr(xdr, OP_LOCK);
3861         if (status == -EIO)
3862                 goto out;
3863         if (status == 0) {
3864                 status = decode_stateid(xdr, &res->stateid);
3865                 if (unlikely(status))
3866                         goto out;
3867         } else if (status == -NFS4ERR_DENIED)
3868                 status = decode_lock_denied(xdr, NULL);
3869         if (res->open_seqid != NULL)
3870                 nfs_increment_open_seqid(status, res->open_seqid);
3871         nfs_increment_lock_seqid(status, res->lock_seqid);
3872 out:
3873         return status;
3874 }
3875
3876 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3877 {
3878         int status;
3879         status = decode_op_hdr(xdr, OP_LOCKT);
3880         if (status == -NFS4ERR_DENIED)
3881                 return decode_lock_denied(xdr, res->denied);
3882         return status;
3883 }
3884
3885 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3886 {
3887         int status;
3888
3889         status = decode_op_hdr(xdr, OP_LOCKU);
3890         if (status != -EIO)
3891                 nfs_increment_lock_seqid(status, res->seqid);
3892         if (status == 0)
3893                 status = decode_stateid(xdr, &res->stateid);
3894         return status;
3895 }
3896
3897 static int decode_lookup(struct xdr_stream *xdr)
3898 {
3899         return decode_op_hdr(xdr, OP_LOOKUP);
3900 }
3901
3902 /* This is too sick! */
3903 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3904 {
3905         __be32 *p;
3906         uint32_t limit_type, nblocks, blocksize;
3907
3908         p = xdr_inline_decode(xdr, 12);
3909         if (unlikely(!p))
3910                 goto out_overflow;
3911         limit_type = be32_to_cpup(p++);
3912         switch (limit_type) {
3913         case 1:
3914                 xdr_decode_hyper(p, maxsize);
3915                 break;
3916         case 2:
3917                 nblocks = be32_to_cpup(p++);
3918                 blocksize = be32_to_cpup(p);
3919                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3920         }
3921         return 0;
3922 out_overflow:
3923         print_overflow_msg(__func__, xdr);
3924         return -EIO;
3925 }
3926
3927 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3928 {
3929         __be32 *p;
3930         uint32_t delegation_type;
3931         int status;
3932
3933         p = xdr_inline_decode(xdr, 4);
3934         if (unlikely(!p))
3935                 goto out_overflow;
3936         delegation_type = be32_to_cpup(p);
3937         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3938                 res->delegation_type = 0;
3939                 return 0;
3940         }
3941         status = decode_stateid(xdr, &res->delegation);
3942         if (unlikely(status))
3943                 return status;
3944         p = xdr_inline_decode(xdr, 4);
3945         if (unlikely(!p))
3946                 goto out_overflow;
3947         res->do_recall = be32_to_cpup(p);
3948
3949         switch (delegation_type) {
3950         case NFS4_OPEN_DELEGATE_READ:
3951                 res->delegation_type = FMODE_READ;
3952                 break;
3953         case NFS4_OPEN_DELEGATE_WRITE:
3954                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3955                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3956                                 return -EIO;
3957         }
3958         return decode_ace(xdr, NULL, res->server->nfs_client);
3959 out_overflow:
3960         print_overflow_msg(__func__, xdr);
3961         return -EIO;
3962 }
3963
3964 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3965 {