NFSv4: Ensure we do not reuse open owner names
[linux-2.6.git] / fs / nfs / nfs4xdr.c
1 /*
2  *  fs/nfs/nfs4xdr.c
3  *
4  *  Client-side XDR for NFSv4.
5  *
6  *  Copyright (c) 2002 The Regents of the University of Michigan.
7  *  All rights reserved.
8  *
9  *  Kendrick Smith <kmsmith@umich.edu>
10  *  Andy Adamson   <andros@umich.edu>
11  *
12  *  Redistribution and use in source and binary forms, with or without
13  *  modification, are permitted provided that the following conditions
14  *  are met:
15  *
16  *  1. Redistributions of source code must retain the above copyright
17  *     notice, this list of conditions and the following disclaimer.
18  *  2. Redistributions in binary form must reproduce the above copyright
19  *     notice, this list of conditions and the following disclaimer in the
20  *     documentation and/or other materials provided with the distribution.
21  *  3. Neither the name of the University nor the names of its
22  *     contributors may be used to endorse or promote products derived
23  *     from this software without specific prior written permission.
24  *
25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56 #include "nfs4_fs.h"
57 #include "internal.h"
58 #include "pnfs.h"
59
60 #define NFSDBG_FACILITY         NFSDBG_XDR
61
62 /* Mapping from NFS error code to "errno" error code. */
63 #define errno_NFSERR_IO         EIO
64
65 static int nfs4_stat_to_errno(int);
66
67 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
68 #ifdef DEBUG
69 #define NFS4_MAXTAGLEN          20
70 #else
71 #define NFS4_MAXTAGLEN          0
72 #endif
73
74 /* lock,open owner id:
75  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
76  */
77 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
78 #define lock_owner_id_maxsz     (1 + 1 + 4)
79 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
80 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
81 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
82 #define op_encode_hdr_maxsz     (1)
83 #define op_decode_hdr_maxsz     (2)
84 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
85 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
86 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
87 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
88 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
89                                 (NFS4_FHSIZE >> 2))
90 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
91 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
92 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
93 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
94 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
95                                 ((3+NFS4_FHSIZE) >> 2))
96 #define nfs4_fattr_bitmap_maxsz 4
97 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
98 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
99 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
100 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
101 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
102 /* This is based on getfattr, which uses the most attributes: */
103 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
104                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
105 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
106                                 nfs4_fattr_value_maxsz)
107 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
108 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
109                                  1 + 2 + 1 + \
110                                 nfs4_owner_maxsz + \
111                                 nfs4_group_maxsz + \
112                                 4 + 4)
113 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
114 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
115 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
116 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
117 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
118 /* The 5 accounts for the PNFS attributes, and assumes that at most three
119  * layout types will be returned.
120  */
121 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
122                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
123 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
124 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
125 #define encode_setclientid_maxsz \
126                                 (op_encode_hdr_maxsz + \
127                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
128                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
129                                 1 /* sc_prog */ + \
130                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
131                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
132                                 1) /* sc_cb_ident */
133 #define decode_setclientid_maxsz \
134                                 (op_decode_hdr_maxsz + \
135                                 2 + \
136                                 1024) /* large value for CLID_INUSE */
137 #define encode_setclientid_confirm_maxsz \
138                                 (op_encode_hdr_maxsz + \
139                                 3 + (NFS4_VERIFIER_SIZE >> 2))
140 #define decode_setclientid_confirm_maxsz \
141                                 (op_decode_hdr_maxsz)
142 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
143 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
144 #define encode_share_access_maxsz \
145                                 (2)
146 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
147 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
148 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
149 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
150                                 2 + encode_share_access_maxsz + 2 + \
151                                 open_owner_id_maxsz + \
152                                 encode_opentype_maxsz + \
153                                 encode_claim_null_maxsz)
154 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
155 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
156                                 decode_ace_maxsz)
157 #define decode_change_info_maxsz        (5)
158 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
159                                 decode_stateid_maxsz + \
160                                 decode_change_info_maxsz + 1 + \
161                                 nfs4_fattr_bitmap_maxsz + \
162                                 decode_delegation_maxsz)
163 #define encode_open_confirm_maxsz \
164                                 (op_encode_hdr_maxsz + \
165                                  encode_stateid_maxsz + 1)
166 #define decode_open_confirm_maxsz \
167                                 (op_decode_hdr_maxsz + \
168                                  decode_stateid_maxsz)
169 #define encode_open_downgrade_maxsz \
170                                 (op_encode_hdr_maxsz + \
171                                  encode_stateid_maxsz + 1 + \
172                                  encode_share_access_maxsz)
173 #define decode_open_downgrade_maxsz \
174                                 (op_decode_hdr_maxsz + \
175                                  decode_stateid_maxsz)
176 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
177                                  1 + encode_stateid_maxsz)
178 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
179                                  decode_stateid_maxsz)
180 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
181                                  encode_stateid_maxsz + \
182                                  encode_attrs_maxsz)
183 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
184                                  nfs4_fattr_bitmap_maxsz)
185 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
186                                  encode_stateid_maxsz + 3)
187 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
188 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
189                                  2 + encode_verifier_maxsz + 5)
190 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
191                                  decode_verifier_maxsz)
192 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
193 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
194 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
195                                  encode_stateid_maxsz + 4)
196 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
197                                  2 + decode_verifier_maxsz)
198 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
199 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
200                                  decode_verifier_maxsz)
201 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
202                                 nfs4_name_maxsz)
203 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
204                                  decode_change_info_maxsz)
205 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
206                                 2 * nfs4_name_maxsz)
207 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
208                                  decode_change_info_maxsz + \
209                                  decode_change_info_maxsz)
210 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
211                                 nfs4_name_maxsz)
212 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
213 #define encode_lockowner_maxsz  (7)
214 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
215                                  7 + \
216                                  1 + encode_stateid_maxsz + 1 + \
217                                  encode_lockowner_maxsz)
218 #define decode_lock_denied_maxsz \
219                                 (8 + decode_lockowner_maxsz)
220 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
221                                  decode_lock_denied_maxsz)
222 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
223                                 encode_lockowner_maxsz)
224 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
225                                  decode_lock_denied_maxsz)
226 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
227                                  encode_stateid_maxsz + \
228                                  4)
229 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
230                                  decode_stateid_maxsz)
231 #define encode_release_lockowner_maxsz \
232                                 (op_encode_hdr_maxsz + \
233                                  encode_lockowner_maxsz)
234 #define decode_release_lockowner_maxsz \
235                                 (op_decode_hdr_maxsz)
236 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
237 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
238 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
239                                 1 + nfs4_name_maxsz + \
240                                 1 + \
241                                 nfs4_fattr_maxsz)
242 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
243 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
244                                 1 + 2 + nfs4_name_maxsz + \
245                                 encode_attrs_maxsz)
246 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
247                                 decode_change_info_maxsz + \
248                                 nfs4_fattr_bitmap_maxsz)
249 #define encode_statfs_maxsz     (encode_getattr_maxsz)
250 #define decode_statfs_maxsz     (decode_getattr_maxsz)
251 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
252 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
253 #define encode_getacl_maxsz     (encode_getattr_maxsz)
254 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
255                                  nfs4_fattr_bitmap_maxsz + 1)
256 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
257                                  encode_stateid_maxsz + 3)
258 #define decode_setacl_maxsz     (decode_setattr_maxsz)
259 #define encode_fs_locations_maxsz \
260                                 (encode_getattr_maxsz)
261 #define decode_fs_locations_maxsz \
262                                 (0)
263 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
264 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
265
266 #if defined(CONFIG_NFS_V4_1)
267 #define NFS4_MAX_MACHINE_NAME_LEN (64)
268
269 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
270                                 encode_verifier_maxsz + \
271                                 1 /* co_ownerid.len */ + \
272                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
273                                 1 /* flags */ + \
274                                 1 /* spa_how */ + \
275                                 0 /* SP4_NONE (for now) */ + \
276                                 1 /* implementation id array of size 1 */ + \
277                                 1 /* nii_domain */ + \
278                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
279                                 1 /* nii_name */ + \
280                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
281                                 3 /* nii_date */)
282 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
283                                 2 /* eir_clientid */ + \
284                                 1 /* eir_sequenceid */ + \
285                                 1 /* eir_flags */ + \
286                                 1 /* spr_how */ + \
287                                 0 /* SP4_NONE (for now) */ + \
288                                 2 /* eir_server_owner.so_minor_id */ + \
289                                 /* eir_server_owner.so_major_id<> */ \
290                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
291                                 /* eir_server_scope<> */ \
292                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
293                                 1 /* eir_server_impl_id array length */ + \
294                                 1 /* nii_domain */ + \
295                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
296                                 1 /* nii_name */ + \
297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
298                                 3 /* nii_date */)
299 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
300 #define decode_channel_attrs_maxsz  (6 + \
301                                      1 /* ca_rdma_ird.len */ + \
302                                      1 /* ca_rdma_ird */)
303 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
304                                      2 /* csa_clientid */ + \
305                                      1 /* csa_sequence */ + \
306                                      1 /* csa_flags */ + \
307                                      encode_channel_attrs_maxsz + \
308                                      encode_channel_attrs_maxsz + \
309                                      1 /* csa_cb_program */ + \
310                                      1 /* csa_sec_parms.len (1) */ + \
311                                      1 /* cb_secflavor (AUTH_SYS) */ + \
312                                      1 /* stamp */ + \
313                                      1 /* machinename.len */ + \
314                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
315                                      1 /* uid */ + \
316                                      1 /* gid */ + \
317                                      1 /* gids.len (0) */)
318 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
319                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
320                                      1 /* csr_sequence */ + \
321                                      1 /* csr_flags */ + \
322                                      decode_channel_attrs_maxsz + \
323                                      decode_channel_attrs_maxsz)
324 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
325 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
326 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
327                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
328 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
329                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
330 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
331 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
332 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
333                                 encode_verifier_maxsz)
334 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
335                                 2 /* nfs_cookie4 gdlr_cookie */ + \
336                                 decode_verifier_maxsz \
337                                   /* verifier4 gdlr_verifier */ + \
338                                 1 /* gdlr_deviceid_list count */ + \
339                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
340                                             NFS4_DEVICEID4_SIZE) \
341                                   /* gdlr_deviceid_list */ + \
342                                 1 /* bool gdlr_eof */)
343 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
344                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
345 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
346                                 1 /* layout type */ + \
347                                 1 /* opaque devaddr4 length */ + \
348                                   /* devaddr4 payload is read into page */ \
349                                 1 /* notification bitmap length */ + \
350                                 1 /* notification bitmap */)
351 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
352                                 encode_stateid_maxsz)
353 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
354                                 decode_stateid_maxsz + \
355                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
356 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
357                                 2 /* offset */ + \
358                                 2 /* length */ + \
359                                 1 /* reclaim */ + \
360                                 encode_stateid_maxsz + \
361                                 1 /* new offset (true) */ + \
362                                 2 /* last byte written */ + \
363                                 1 /* nt_timechanged (false) */ + \
364                                 1 /* layoutupdate4 layout type */ + \
365                                 1 /* NULL filelayout layoutupdate4 payload */)
366 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
367 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
368                                 encode_stateid_maxsz + \
369                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
370 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
371                                 1 + decode_stateid_maxsz)
372 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
373 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
374 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
375                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
376 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
377 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
378                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
379 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
380 #else /* CONFIG_NFS_V4_1 */
381 #define encode_sequence_maxsz   0
382 #define decode_sequence_maxsz   0
383 #endif /* CONFIG_NFS_V4_1 */
384
385 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
386 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
387 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
388                                 encode_sequence_maxsz + \
389                                 encode_putfh_maxsz + \
390                                 encode_read_maxsz)
391 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
392                                 decode_sequence_maxsz + \
393                                 decode_putfh_maxsz + \
394                                 decode_read_maxsz)
395 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
396                                 encode_sequence_maxsz + \
397                                 encode_putfh_maxsz + \
398                                 encode_readlink_maxsz)
399 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
400                                 decode_sequence_maxsz + \
401                                 decode_putfh_maxsz + \
402                                 decode_readlink_maxsz)
403 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
404                                 encode_sequence_maxsz + \
405                                 encode_putfh_maxsz + \
406                                 encode_readdir_maxsz)
407 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
408                                 decode_sequence_maxsz + \
409                                 decode_putfh_maxsz + \
410                                 decode_readdir_maxsz)
411 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
412                                 encode_sequence_maxsz + \
413                                 encode_putfh_maxsz + \
414                                 encode_write_maxsz + \
415                                 encode_getattr_maxsz)
416 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
417                                 decode_sequence_maxsz + \
418                                 decode_putfh_maxsz + \
419                                 decode_write_maxsz + \
420                                 decode_getattr_maxsz)
421 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
422                                 encode_sequence_maxsz + \
423                                 encode_putfh_maxsz + \
424                                 encode_commit_maxsz + \
425                                 encode_getattr_maxsz)
426 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
427                                 decode_sequence_maxsz + \
428                                 decode_putfh_maxsz + \
429                                 decode_commit_maxsz + \
430                                 decode_getattr_maxsz)
431 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
432                                 encode_sequence_maxsz + \
433                                 encode_putfh_maxsz + \
434                                 encode_savefh_maxsz + \
435                                 encode_open_maxsz + \
436                                 encode_getfh_maxsz + \
437                                 encode_getattr_maxsz + \
438                                 encode_restorefh_maxsz + \
439                                 encode_getattr_maxsz)
440 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
441                                 decode_sequence_maxsz + \
442                                 decode_putfh_maxsz + \
443                                 decode_savefh_maxsz + \
444                                 decode_open_maxsz + \
445                                 decode_getfh_maxsz + \
446                                 decode_getattr_maxsz + \
447                                 decode_restorefh_maxsz + \
448                                 decode_getattr_maxsz)
449 #define NFS4_enc_open_confirm_sz \
450                                 (compound_encode_hdr_maxsz + \
451                                  encode_putfh_maxsz + \
452                                  encode_open_confirm_maxsz)
453 #define NFS4_dec_open_confirm_sz \
454                                 (compound_decode_hdr_maxsz + \
455                                  decode_putfh_maxsz + \
456                                  decode_open_confirm_maxsz)
457 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
458                                         encode_sequence_maxsz + \
459                                         encode_putfh_maxsz + \
460                                         encode_open_maxsz + \
461                                         encode_getattr_maxsz)
462 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
463                                         decode_sequence_maxsz + \
464                                         decode_putfh_maxsz + \
465                                         decode_open_maxsz + \
466                                         decode_getattr_maxsz)
467 #define NFS4_enc_open_downgrade_sz \
468                                 (compound_encode_hdr_maxsz + \
469                                  encode_sequence_maxsz + \
470                                  encode_putfh_maxsz + \
471                                  encode_open_downgrade_maxsz + \
472                                  encode_getattr_maxsz)
473 #define NFS4_dec_open_downgrade_sz \
474                                 (compound_decode_hdr_maxsz + \
475                                  decode_sequence_maxsz + \
476                                  decode_putfh_maxsz + \
477                                  decode_open_downgrade_maxsz + \
478                                  decode_getattr_maxsz)
479 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
480                                  encode_sequence_maxsz + \
481                                  encode_putfh_maxsz + \
482                                  encode_close_maxsz + \
483                                  encode_getattr_maxsz)
484 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
485                                  decode_sequence_maxsz + \
486                                  decode_putfh_maxsz + \
487                                  decode_close_maxsz + \
488                                  decode_getattr_maxsz)
489 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
490                                  encode_sequence_maxsz + \
491                                  encode_putfh_maxsz + \
492                                  encode_setattr_maxsz + \
493                                  encode_getattr_maxsz)
494 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
495                                  decode_sequence_maxsz + \
496                                  decode_putfh_maxsz + \
497                                  decode_setattr_maxsz + \
498                                  decode_getattr_maxsz)
499 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
500                                 encode_sequence_maxsz + \
501                                 encode_putfh_maxsz + \
502                                 encode_fsinfo_maxsz)
503 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
504                                 decode_sequence_maxsz + \
505                                 decode_putfh_maxsz + \
506                                 decode_fsinfo_maxsz)
507 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
508                                 encode_renew_maxsz)
509 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
510                                 decode_renew_maxsz)
511 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
512                                 encode_setclientid_maxsz)
513 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
514                                 decode_setclientid_maxsz)
515 #define NFS4_enc_setclientid_confirm_sz \
516                                 (compound_encode_hdr_maxsz + \
517                                 encode_setclientid_confirm_maxsz + \
518                                 encode_putrootfh_maxsz + \
519                                 encode_fsinfo_maxsz)
520 #define NFS4_dec_setclientid_confirm_sz \
521                                 (compound_decode_hdr_maxsz + \
522                                 decode_setclientid_confirm_maxsz + \
523                                 decode_putrootfh_maxsz + \
524                                 decode_fsinfo_maxsz)
525 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
526                                 encode_sequence_maxsz + \
527                                 encode_putfh_maxsz + \
528                                 encode_lock_maxsz)
529 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
530                                 decode_sequence_maxsz + \
531                                 decode_putfh_maxsz + \
532                                 decode_lock_maxsz)
533 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
534                                 encode_sequence_maxsz + \
535                                 encode_putfh_maxsz + \
536                                 encode_lockt_maxsz)
537 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
538                                  decode_sequence_maxsz + \
539                                  decode_putfh_maxsz + \
540                                  decode_lockt_maxsz)
541 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
542                                 encode_sequence_maxsz + \
543                                 encode_putfh_maxsz + \
544                                 encode_locku_maxsz)
545 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
546                                 decode_sequence_maxsz + \
547                                 decode_putfh_maxsz + \
548                                 decode_locku_maxsz)
549 #define NFS4_enc_release_lockowner_sz \
550                                 (compound_encode_hdr_maxsz + \
551                                  encode_lockowner_maxsz)
552 #define NFS4_dec_release_lockowner_sz \
553                                 (compound_decode_hdr_maxsz + \
554                                  decode_lockowner_maxsz)
555 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
556                                 encode_sequence_maxsz + \
557                                 encode_putfh_maxsz + \
558                                 encode_access_maxsz + \
559                                 encode_getattr_maxsz)
560 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
561                                 decode_sequence_maxsz + \
562                                 decode_putfh_maxsz + \
563                                 decode_access_maxsz + \
564                                 decode_getattr_maxsz)
565 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
566                                 encode_sequence_maxsz + \
567                                 encode_putfh_maxsz + \
568                                 encode_getattr_maxsz)
569 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
570                                 decode_sequence_maxsz + \
571                                 decode_putfh_maxsz + \
572                                 decode_getattr_maxsz)
573 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
574                                 encode_sequence_maxsz + \
575                                 encode_putfh_maxsz + \
576                                 encode_lookup_maxsz + \
577                                 encode_getattr_maxsz + \
578                                 encode_getfh_maxsz)
579 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
580                                 decode_sequence_maxsz + \
581                                 decode_putfh_maxsz + \
582                                 decode_lookup_maxsz + \
583                                 decode_getattr_maxsz + \
584                                 decode_getfh_maxsz)
585 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
586                                 encode_sequence_maxsz + \
587                                 encode_putrootfh_maxsz + \
588                                 encode_getattr_maxsz + \
589                                 encode_getfh_maxsz)
590 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
591                                 decode_sequence_maxsz + \
592                                 decode_putrootfh_maxsz + \
593                                 decode_getattr_maxsz + \
594                                 decode_getfh_maxsz)
595 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
596                                 encode_sequence_maxsz + \
597                                 encode_putfh_maxsz + \
598                                 encode_remove_maxsz + \
599                                 encode_getattr_maxsz)
600 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
601                                 decode_sequence_maxsz + \
602                                 decode_putfh_maxsz + \
603                                 decode_remove_maxsz + \
604                                 decode_getattr_maxsz)
605 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
606                                 encode_sequence_maxsz + \
607                                 encode_putfh_maxsz + \
608                                 encode_savefh_maxsz + \
609                                 encode_putfh_maxsz + \
610                                 encode_rename_maxsz + \
611                                 encode_getattr_maxsz + \
612                                 encode_restorefh_maxsz + \
613                                 encode_getattr_maxsz)
614 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
615                                 decode_sequence_maxsz + \
616                                 decode_putfh_maxsz + \
617                                 decode_savefh_maxsz + \
618                                 decode_putfh_maxsz + \
619                                 decode_rename_maxsz + \
620                                 decode_getattr_maxsz + \
621                                 decode_restorefh_maxsz + \
622                                 decode_getattr_maxsz)
623 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
624                                 encode_sequence_maxsz + \
625                                 encode_putfh_maxsz + \
626                                 encode_savefh_maxsz + \
627                                 encode_putfh_maxsz + \
628                                 encode_link_maxsz + \
629                                 decode_getattr_maxsz + \
630                                 encode_restorefh_maxsz + \
631                                 decode_getattr_maxsz)
632 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
633                                 decode_sequence_maxsz + \
634                                 decode_putfh_maxsz + \
635                                 decode_savefh_maxsz + \
636                                 decode_putfh_maxsz + \
637                                 decode_link_maxsz + \
638                                 decode_getattr_maxsz + \
639                                 decode_restorefh_maxsz + \
640                                 decode_getattr_maxsz)
641 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
642                                 encode_sequence_maxsz + \
643                                 encode_putfh_maxsz + \
644                                 encode_symlink_maxsz + \
645                                 encode_getattr_maxsz + \
646                                 encode_getfh_maxsz)
647 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
648                                 decode_sequence_maxsz + \
649                                 decode_putfh_maxsz + \
650                                 decode_symlink_maxsz + \
651                                 decode_getattr_maxsz + \
652                                 decode_getfh_maxsz)
653 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
654                                 encode_sequence_maxsz + \
655                                 encode_putfh_maxsz + \
656                                 encode_savefh_maxsz + \
657                                 encode_create_maxsz + \
658                                 encode_getfh_maxsz + \
659                                 encode_getattr_maxsz + \
660                                 encode_restorefh_maxsz + \
661                                 encode_getattr_maxsz)
662 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
663                                 decode_sequence_maxsz + \
664                                 decode_putfh_maxsz + \
665                                 decode_savefh_maxsz + \
666                                 decode_create_maxsz + \
667                                 decode_getfh_maxsz + \
668                                 decode_getattr_maxsz + \
669                                 decode_restorefh_maxsz + \
670                                 decode_getattr_maxsz)
671 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
672                                 encode_sequence_maxsz + \
673                                 encode_putfh_maxsz + \
674                                 encode_getattr_maxsz)
675 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
676                                 decode_sequence_maxsz + \
677                                 decode_putfh_maxsz + \
678                                 decode_getattr_maxsz)
679 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
680                                 encode_sequence_maxsz + \
681                                 encode_putfh_maxsz + \
682                                 encode_statfs_maxsz)
683 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
684                                 decode_sequence_maxsz + \
685                                 decode_putfh_maxsz + \
686                                 decode_statfs_maxsz)
687 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
688                                 encode_sequence_maxsz + \
689                                 encode_putfh_maxsz + \
690                                 encode_getattr_maxsz)
691 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
692                                 decode_sequence_maxsz + \
693                                 decode_putfh_maxsz + \
694                                 decode_getattr_maxsz)
695 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
696                                 encode_sequence_maxsz + \
697                                 encode_putfh_maxsz + \
698                                 encode_delegreturn_maxsz + \
699                                 encode_getattr_maxsz)
700 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
701                                 decode_sequence_maxsz + \
702                                 decode_delegreturn_maxsz + \
703                                 decode_getattr_maxsz)
704 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
705                                 encode_sequence_maxsz + \
706                                 encode_putfh_maxsz + \
707                                 encode_getacl_maxsz)
708 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
709                                 decode_sequence_maxsz + \
710                                 decode_putfh_maxsz + \
711                                 decode_getacl_maxsz)
712 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
713                                 encode_sequence_maxsz + \
714                                 encode_putfh_maxsz + \
715                                 encode_setacl_maxsz)
716 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
717                                 decode_sequence_maxsz + \
718                                 decode_putfh_maxsz + \
719                                 decode_setacl_maxsz)
720 #define NFS4_enc_fs_locations_sz \
721                                 (compound_encode_hdr_maxsz + \
722                                  encode_sequence_maxsz + \
723                                  encode_putfh_maxsz + \
724                                  encode_lookup_maxsz + \
725                                  encode_fs_locations_maxsz)
726 #define NFS4_dec_fs_locations_sz \
727                                 (compound_decode_hdr_maxsz + \
728                                  decode_sequence_maxsz + \
729                                  decode_putfh_maxsz + \
730                                  decode_lookup_maxsz + \
731                                  decode_fs_locations_maxsz)
732 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
733                                 encode_sequence_maxsz + \
734                                 encode_putfh_maxsz + \
735                                 encode_secinfo_maxsz)
736 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
737                                 decode_sequence_maxsz + \
738                                 decode_putfh_maxsz + \
739                                 decode_secinfo_maxsz)
740 #if defined(CONFIG_NFS_V4_1)
741 #define NFS4_enc_exchange_id_sz \
742                                 (compound_encode_hdr_maxsz + \
743                                  encode_exchange_id_maxsz)
744 #define NFS4_dec_exchange_id_sz \
745                                 (compound_decode_hdr_maxsz + \
746                                  decode_exchange_id_maxsz)
747 #define NFS4_enc_create_session_sz \
748                                 (compound_encode_hdr_maxsz + \
749                                  encode_create_session_maxsz)
750 #define NFS4_dec_create_session_sz \
751                                 (compound_decode_hdr_maxsz + \
752                                  decode_create_session_maxsz)
753 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
754                                          encode_destroy_session_maxsz)
755 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
756                                          decode_destroy_session_maxsz)
757 #define NFS4_enc_sequence_sz \
758                                 (compound_decode_hdr_maxsz + \
759                                  encode_sequence_maxsz)
760 #define NFS4_dec_sequence_sz \
761                                 (compound_decode_hdr_maxsz + \
762                                  decode_sequence_maxsz)
763 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
764                                          encode_sequence_maxsz + \
765                                          encode_putrootfh_maxsz + \
766                                          encode_fsinfo_maxsz)
767 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
768                                          decode_sequence_maxsz + \
769                                          decode_putrootfh_maxsz + \
770                                          decode_fsinfo_maxsz)
771 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
772                                          encode_sequence_maxsz + \
773                                          encode_reclaim_complete_maxsz)
774 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
775                                          decode_sequence_maxsz + \
776                                          decode_reclaim_complete_maxsz)
777 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
778                                 encode_sequence_maxsz + \
779                                 encode_putfh_maxsz + \
780                                 encode_getdevicelist_maxsz)
781 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
782                                 decode_sequence_maxsz + \
783                                 decode_putfh_maxsz + \
784                                 decode_getdevicelist_maxsz)
785 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
786                                 encode_sequence_maxsz +\
787                                 encode_getdeviceinfo_maxsz)
788 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
789                                 decode_sequence_maxsz + \
790                                 decode_getdeviceinfo_maxsz)
791 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
792                                 encode_sequence_maxsz + \
793                                 encode_putfh_maxsz +        \
794                                 encode_layoutget_maxsz)
795 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
796                                 decode_sequence_maxsz + \
797                                 decode_putfh_maxsz +        \
798                                 decode_layoutget_maxsz)
799 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
800                                 encode_sequence_maxsz +\
801                                 encode_putfh_maxsz + \
802                                 encode_layoutcommit_maxsz + \
803                                 encode_getattr_maxsz)
804 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
805                                 decode_sequence_maxsz + \
806                                 decode_putfh_maxsz + \
807                                 decode_layoutcommit_maxsz + \
808                                 decode_getattr_maxsz)
809 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
810                                 encode_sequence_maxsz + \
811                                 encode_putfh_maxsz + \
812                                 encode_layoutreturn_maxsz)
813 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
814                                 decode_sequence_maxsz + \
815                                 decode_putfh_maxsz + \
816                                 decode_layoutreturn_maxsz)
817 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
818                                         encode_sequence_maxsz + \
819                                         encode_putrootfh_maxsz +\
820                                         encode_secinfo_no_name_maxsz)
821 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
822                                         decode_sequence_maxsz + \
823                                         decode_putrootfh_maxsz + \
824                                         decode_secinfo_no_name_maxsz)
825 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
826                                          encode_sequence_maxsz + \
827                                          encode_test_stateid_maxsz)
828 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
829                                          decode_sequence_maxsz + \
830                                          decode_test_stateid_maxsz)
831 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
832                                          encode_sequence_maxsz + \
833                                          encode_free_stateid_maxsz)
834 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
835                                          decode_sequence_maxsz + \
836                                          decode_free_stateid_maxsz)
837
838 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
839                                       compound_encode_hdr_maxsz +
840                                       encode_sequence_maxsz +
841                                       encode_putfh_maxsz +
842                                       encode_getattr_maxsz) *
843                                      XDR_UNIT);
844
845 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
846                                      compound_decode_hdr_maxsz +
847                                      decode_sequence_maxsz +
848                                      decode_putfh_maxsz) *
849                                     XDR_UNIT);
850 #endif /* CONFIG_NFS_V4_1 */
851
852 static unsigned short send_implementation_id = 1;
853
854 module_param(send_implementation_id, ushort, 0644);
855 MODULE_PARM_DESC(send_implementation_id,
856                 "Send implementation ID with NFSv4.1 exchange_id");
857
858 static const umode_t nfs_type2fmt[] = {
859         [NF4BAD] = 0,
860         [NF4REG] = S_IFREG,
861         [NF4DIR] = S_IFDIR,
862         [NF4BLK] = S_IFBLK,
863         [NF4CHR] = S_IFCHR,
864         [NF4LNK] = S_IFLNK,
865         [NF4SOCK] = S_IFSOCK,
866         [NF4FIFO] = S_IFIFO,
867         [NF4ATTRDIR] = 0,
868         [NF4NAMEDATTR] = 0,
869 };
870
871 struct compound_hdr {
872         int32_t         status;
873         uint32_t        nops;
874         __be32 *        nops_p;
875         uint32_t        taglen;
876         char *          tag;
877         uint32_t        replen;         /* expected reply words */
878         u32             minorversion;
879 };
880
881 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
882 {
883         __be32 *p = xdr_reserve_space(xdr, nbytes);
884         BUG_ON(!p);
885         return p;
886 }
887
888 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
889 {
890         __be32 *p;
891
892         p = xdr_reserve_space(xdr, len);
893         xdr_encode_opaque_fixed(p, buf, len);
894 }
895
896 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
897 {
898         __be32 *p;
899
900         p = reserve_space(xdr, 4 + len);
901         xdr_encode_opaque(p, str, len);
902 }
903
904 static void encode_uint32(struct xdr_stream *xdr, u32 n)
905 {
906         __be32 *p;
907
908         p = reserve_space(xdr, 4);
909         *p = cpu_to_be32(n);
910 }
911
912 static void encode_uint64(struct xdr_stream *xdr, u64 n)
913 {
914         __be32 *p;
915
916         p = reserve_space(xdr, 8);
917         xdr_encode_hyper(p, n);
918 }
919
920 static void encode_nfs4_seqid(struct xdr_stream *xdr,
921                 const struct nfs_seqid *seqid)
922 {
923         encode_uint32(xdr, seqid->sequence->counter);
924 }
925
926 static void encode_compound_hdr(struct xdr_stream *xdr,
927                                 struct rpc_rqst *req,
928                                 struct compound_hdr *hdr)
929 {
930         __be32 *p;
931         struct rpc_auth *auth = req->rq_cred->cr_auth;
932
933         /* initialize running count of expected bytes in reply.
934          * NOTE: the replied tag SHOULD be the same is the one sent,
935          * but this is not required as a MUST for the server to do so. */
936         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
937
938         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
939         encode_string(xdr, hdr->taglen, hdr->tag);
940         p = reserve_space(xdr, 8);
941         *p++ = cpu_to_be32(hdr->minorversion);
942         hdr->nops_p = p;
943         *p = cpu_to_be32(hdr->nops);
944 }
945
946 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
947                 uint32_t replen,
948                 struct compound_hdr *hdr)
949 {
950         encode_uint32(xdr, op);
951         hdr->nops++;
952         hdr->replen += replen;
953 }
954
955 static void encode_nops(struct compound_hdr *hdr)
956 {
957         BUG_ON(hdr->nops > NFS4_MAX_OPS);
958         *hdr->nops_p = htonl(hdr->nops);
959 }
960
961 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
962 {
963         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
964 }
965
966 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
967 {
968         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
969 }
970
971 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
972 {
973         char owner_name[IDMAP_NAMESZ];
974         char owner_group[IDMAP_NAMESZ];
975         int owner_namelen = 0;
976         int owner_grouplen = 0;
977         __be32 *p;
978         __be32 *q;
979         int len;
980         uint32_t bmval0 = 0;
981         uint32_t bmval1 = 0;
982
983         /*
984          * We reserve enough space to write the entire attribute buffer at once.
985          * In the worst-case, this would be
986          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
987          *          = 36 bytes, plus any contribution from variable-length fields
988          *            such as owner/group.
989          */
990         len = 16;
991
992         /* Sigh */
993         if (iap->ia_valid & ATTR_SIZE)
994                 len += 8;
995         if (iap->ia_valid & ATTR_MODE)
996                 len += 4;
997         if (iap->ia_valid & ATTR_UID) {
998                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
999                 if (owner_namelen < 0) {
1000                         dprintk("nfs: couldn't resolve uid %d to string\n",
1001                                         iap->ia_uid);
1002                         /* XXX */
1003                         strcpy(owner_name, "nobody");
1004                         owner_namelen = sizeof("nobody") - 1;
1005                         /* goto out; */
1006                 }
1007                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1008         }
1009         if (iap->ia_valid & ATTR_GID) {
1010                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1011                 if (owner_grouplen < 0) {
1012                         dprintk("nfs: couldn't resolve gid %d to string\n",
1013                                         iap->ia_gid);
1014                         strcpy(owner_group, "nobody");
1015                         owner_grouplen = sizeof("nobody") - 1;
1016                         /* goto out; */
1017                 }
1018                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1019         }
1020         if (iap->ia_valid & ATTR_ATIME_SET)
1021                 len += 16;
1022         else if (iap->ia_valid & ATTR_ATIME)
1023                 len += 4;
1024         if (iap->ia_valid & ATTR_MTIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_MTIME)
1027                 len += 4;
1028         p = reserve_space(xdr, len);
1029
1030         /*
1031          * We write the bitmap length now, but leave the bitmap and the attribute
1032          * buffer length to be backfilled at the end of this routine.
1033          */
1034         *p++ = cpu_to_be32(2);
1035         q = p;
1036         p += 3;
1037
1038         if (iap->ia_valid & ATTR_SIZE) {
1039                 bmval0 |= FATTR4_WORD0_SIZE;
1040                 p = xdr_encode_hyper(p, iap->ia_size);
1041         }
1042         if (iap->ia_valid & ATTR_MODE) {
1043                 bmval1 |= FATTR4_WORD1_MODE;
1044                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1045         }
1046         if (iap->ia_valid & ATTR_UID) {
1047                 bmval1 |= FATTR4_WORD1_OWNER;
1048                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1049         }
1050         if (iap->ia_valid & ATTR_GID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1052                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1053         }
1054         if (iap->ia_valid & ATTR_ATIME_SET) {
1055                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1057                 *p++ = cpu_to_be32(0);
1058                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1059                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1060         }
1061         else if (iap->ia_valid & ATTR_ATIME) {
1062                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1063                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1064         }
1065         if (iap->ia_valid & ATTR_MTIME_SET) {
1066                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1067                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1068                 *p++ = cpu_to_be32(0);
1069                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1070                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1071         }
1072         else if (iap->ia_valid & ATTR_MTIME) {
1073                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1074                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1075         }
1076
1077         /*
1078          * Now we backfill the bitmap and the attribute buffer length.
1079          */
1080         if (len != ((char *)p - (char *)q) + 4) {
1081                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1082                                 len, ((char *)p - (char *)q) + 4);
1083                 BUG();
1084         }
1085         len = (char *)p - (char *)q - 12;
1086         *q++ = htonl(bmval0);
1087         *q++ = htonl(bmval1);
1088         *q = htonl(len);
1089
1090 /* out: */
1091 }
1092
1093 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1094 {
1095         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1096         encode_uint32(xdr, access);
1097 }
1098
1099 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1100 {
1101         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1102         encode_nfs4_seqid(xdr, arg->seqid);
1103         encode_nfs4_stateid(xdr, arg->stateid);
1104 }
1105
1106 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1107 {
1108         __be32 *p;
1109
1110         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1111         p = reserve_space(xdr, 12);
1112         p = xdr_encode_hyper(p, args->offset);
1113         *p = cpu_to_be32(args->count);
1114 }
1115
1116 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1117 {
1118         __be32 *p;
1119
1120         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1121         encode_uint32(xdr, create->ftype);
1122
1123         switch (create->ftype) {
1124         case NF4LNK:
1125                 p = reserve_space(xdr, 4);
1126                 *p = cpu_to_be32(create->u.symlink.len);
1127                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1128                 break;
1129
1130         case NF4BLK: case NF4CHR:
1131                 p = reserve_space(xdr, 8);
1132                 *p++ = cpu_to_be32(create->u.device.specdata1);
1133                 *p = cpu_to_be32(create->u.device.specdata2);
1134                 break;
1135
1136         default:
1137                 break;
1138         }
1139
1140         encode_string(xdr, create->name->len, create->name->name);
1141         encode_attrs(xdr, create->attrs, create->server);
1142 }
1143
1144 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1145 {
1146         __be32 *p;
1147
1148         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1149         p = reserve_space(xdr, 8);
1150         *p++ = cpu_to_be32(1);
1151         *p = cpu_to_be32(bitmap);
1152 }
1153
1154 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1155 {
1156         __be32 *p;
1157
1158         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1159         p = reserve_space(xdr, 12);
1160         *p++ = cpu_to_be32(2);
1161         *p++ = cpu_to_be32(bm0);
1162         *p = cpu_to_be32(bm1);
1163 }
1164
1165 static void
1166 encode_getattr_three(struct xdr_stream *xdr,
1167                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1168                      struct compound_hdr *hdr)
1169 {
1170         __be32 *p;
1171
1172         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1173         if (bm2) {
1174                 p = reserve_space(xdr, 16);
1175                 *p++ = cpu_to_be32(3);
1176                 *p++ = cpu_to_be32(bm0);
1177                 *p++ = cpu_to_be32(bm1);
1178                 *p = cpu_to_be32(bm2);
1179         } else if (bm1) {
1180                 p = reserve_space(xdr, 12);
1181                 *p++ = cpu_to_be32(2);
1182                 *p++ = cpu_to_be32(bm0);
1183                 *p = cpu_to_be32(bm1);
1184         } else {
1185                 p = reserve_space(xdr, 8);
1186                 *p++ = cpu_to_be32(1);
1187                 *p = cpu_to_be32(bm0);
1188         }
1189 }
1190
1191 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1192 {
1193         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1194                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1195 }
1196
1197 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1198 {
1199         encode_getattr_three(xdr,
1200                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1201                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1202                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1203                              hdr);
1204 }
1205
1206 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1207 {
1208         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1209                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1210 }
1211
1212 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1213 {
1214         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1215 }
1216
1217 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1218 {
1219         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1220         encode_string(xdr, name->len, name->name);
1221 }
1222
1223 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1224 {
1225         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1226                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1227         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1228 }
1229
1230 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1231 {
1232         if (fl->fl_end == OFFSET_MAX)
1233                 return ~(uint64_t)0;
1234         return fl->fl_end - fl->fl_start + 1;
1235 }
1236
1237 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1238 {
1239         __be32 *p;
1240
1241         p = reserve_space(xdr, 32);
1242         p = xdr_encode_hyper(p, lowner->clientid);
1243         *p++ = cpu_to_be32(20);
1244         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1245         *p++ = cpu_to_be32(lowner->s_dev);
1246         xdr_encode_hyper(p, lowner->id);
1247 }
1248
1249 /*
1250  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1251  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1252  */
1253 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1254 {
1255         __be32 *p;
1256
1257         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1258         p = reserve_space(xdr, 28);
1259         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1260         *p++ = cpu_to_be32(args->reclaim);
1261         p = xdr_encode_hyper(p, args->fl->fl_start);
1262         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1263         *p = cpu_to_be32(args->new_lock_owner);
1264         if (args->new_lock_owner){
1265                 encode_nfs4_seqid(xdr, args->open_seqid);
1266                 encode_nfs4_stateid(xdr, args->open_stateid);
1267                 encode_nfs4_seqid(xdr, args->lock_seqid);
1268                 encode_lockowner(xdr, &args->lock_owner);
1269         }
1270         else {
1271                 encode_nfs4_stateid(xdr, args->lock_stateid);
1272                 encode_nfs4_seqid(xdr, args->lock_seqid);
1273         }
1274 }
1275
1276 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1277 {
1278         __be32 *p;
1279
1280         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1281         p = reserve_space(xdr, 20);
1282         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1283         p = xdr_encode_hyper(p, args->fl->fl_start);
1284         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1285         encode_lockowner(xdr, &args->lock_owner);
1286 }
1287
1288 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1289 {
1290         __be32 *p;
1291
1292         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1293         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1294         encode_nfs4_seqid(xdr, args->seqid);
1295         encode_nfs4_stateid(xdr, args->stateid);
1296         p = reserve_space(xdr, 16);
1297         p = xdr_encode_hyper(p, args->fl->fl_start);
1298         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299 }
1300
1301 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1302 {
1303         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1304         encode_lockowner(xdr, lowner);
1305 }
1306
1307 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1308 {
1309         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1310         encode_string(xdr, name->len, name->name);
1311 }
1312
1313 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1314 {
1315         __be32 *p;
1316
1317         p = reserve_space(xdr, 8);
1318         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1319         case FMODE_READ:
1320                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1321                 break;
1322         case FMODE_WRITE:
1323                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1324                 break;
1325         case FMODE_READ|FMODE_WRITE:
1326                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1327                 break;
1328         default:
1329                 *p++ = cpu_to_be32(0);
1330         }
1331         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1332 }
1333
1334 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1335 {
1336         __be32 *p;
1337  /*
1338  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1339  * owner 4 = 32
1340  */
1341         encode_nfs4_seqid(xdr, arg->seqid);
1342         encode_share_access(xdr, arg->fmode);
1343         p = reserve_space(xdr, 36);
1344         p = xdr_encode_hyper(p, arg->clientid);
1345         *p++ = cpu_to_be32(24);
1346         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1347         *p++ = cpu_to_be32(arg->server->s_dev);
1348         *p++ = cpu_to_be32(arg->id.uniquifier);
1349         xdr_encode_hyper(p, arg->id.create_time);
1350 }
1351
1352 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1353 {
1354         __be32 *p;
1355         struct nfs_client *clp;
1356
1357         p = reserve_space(xdr, 4);
1358         switch(arg->open_flags & O_EXCL) {
1359         case 0:
1360                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1361                 encode_attrs(xdr, arg->u.attrs, arg->server);
1362                 break;
1363         default:
1364                 clp = arg->server->nfs_client;
1365                 if (clp->cl_mvops->minor_version > 0) {
1366                         if (nfs4_has_persistent_session(clp)) {
1367                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1368                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1369                         } else {
1370                                 struct iattr dummy;
1371
1372                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1373                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1374                                 dummy.ia_valid = 0;
1375                                 encode_attrs(xdr, &dummy, arg->server);
1376                         }
1377                 } else {
1378                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1379                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1380                 }
1381         }
1382 }
1383
1384 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1385 {
1386         __be32 *p;
1387
1388         p = reserve_space(xdr, 4);
1389         switch (arg->open_flags & O_CREAT) {
1390         case 0:
1391                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1392                 break;
1393         default:
1394                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1395                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1396                 encode_createmode(xdr, arg);
1397         }
1398 }
1399
1400 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1401 {
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 4);
1405         switch (delegation_type) {
1406         case 0:
1407                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1408                 break;
1409         case FMODE_READ:
1410                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1411                 break;
1412         case FMODE_WRITE|FMODE_READ:
1413                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1414                 break;
1415         default:
1416                 BUG();
1417         }
1418 }
1419
1420 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1421 {
1422         __be32 *p;
1423
1424         p = reserve_space(xdr, 4);
1425         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1426         encode_string(xdr, name->len, name->name);
1427 }
1428
1429 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1435         encode_delegation_type(xdr, type);
1436 }
1437
1438 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4);
1443         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1444         encode_nfs4_stateid(xdr, stateid);
1445         encode_string(xdr, name->len, name->name);
1446 }
1447
1448 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1449 {
1450         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1451         encode_openhdr(xdr, arg);
1452         encode_opentype(xdr, arg);
1453         switch (arg->claim) {
1454         case NFS4_OPEN_CLAIM_NULL:
1455                 encode_claim_null(xdr, arg->name);
1456                 break;
1457         case NFS4_OPEN_CLAIM_PREVIOUS:
1458                 encode_claim_previous(xdr, arg->u.delegation_type);
1459                 break;
1460         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1461                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1462                 break;
1463         default:
1464                 BUG();
1465         }
1466 }
1467
1468 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1469 {
1470         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1471         encode_nfs4_stateid(xdr, arg->stateid);
1472         encode_nfs4_seqid(xdr, arg->seqid);
1473 }
1474
1475 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1476 {
1477         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1478         encode_nfs4_stateid(xdr, arg->stateid);
1479         encode_nfs4_seqid(xdr, arg->seqid);
1480         encode_share_access(xdr, arg->fmode);
1481 }
1482
1483 static void
1484 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1485 {
1486         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1487         encode_string(xdr, fh->size, fh->data);
1488 }
1489
1490 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1491 {
1492         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1493 }
1494
1495 static void encode_open_stateid(struct xdr_stream *xdr,
1496                 const struct nfs_open_context *ctx,
1497                 const struct nfs_lock_context *l_ctx,
1498                 fmode_t fmode,
1499                 int zero_seqid)
1500 {
1501         nfs4_stateid stateid;
1502
1503         if (ctx->state != NULL) {
1504                 nfs4_select_rw_stateid(&stateid, ctx->state,
1505                                 fmode, l_ctx->lockowner, l_ctx->pid);
1506                 if (zero_seqid)
1507                         stateid.seqid = 0;
1508                 encode_nfs4_stateid(xdr, &stateid);
1509         } else
1510                 encode_nfs4_stateid(xdr, &zero_stateid);
1511 }
1512
1513 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1514 {
1515         __be32 *p;
1516
1517         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1518         encode_open_stateid(xdr, args->context, args->lock_context,
1519                         FMODE_READ, hdr->minorversion);
1520
1521         p = reserve_space(xdr, 12);
1522         p = xdr_encode_hyper(p, args->offset);
1523         *p = cpu_to_be32(args->count);
1524 }
1525
1526 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1527 {
1528         uint32_t attrs[2] = {
1529                 FATTR4_WORD0_RDATTR_ERROR,
1530                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1531         };
1532         uint32_t dircount = readdir->count >> 1;
1533         __be32 *p, verf[2];
1534
1535         if (readdir->plus) {
1536                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1537                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1538                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1539                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1540                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1541                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1542                 dircount >>= 1;
1543         }
1544         /* Use mounted_on_fileid only if the server supports it */
1545         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1546                 attrs[0] |= FATTR4_WORD0_FILEID;
1547
1548         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1549         encode_uint64(xdr, readdir->cookie);
1550         encode_nfs4_verifier(xdr, &readdir->verifier);
1551         p = reserve_space(xdr, 20);
1552         *p++ = cpu_to_be32(dircount);
1553         *p++ = cpu_to_be32(readdir->count);
1554         *p++ = cpu_to_be32(2);
1555
1556         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1557         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1558         memcpy(verf, readdir->verifier.data, sizeof(verf));
1559         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1560                         __func__,
1561                         (unsigned long long)readdir->cookie,
1562                         verf[0], verf[1],
1563                         attrs[0] & readdir->bitmask[0],
1564                         attrs[1] & readdir->bitmask[1]);
1565 }
1566
1567 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1568 {
1569         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1570 }
1571
1572 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1573 {
1574         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1575         encode_string(xdr, name->len, name->name);
1576 }
1577
1578 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1579 {
1580         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1581         encode_string(xdr, oldname->len, oldname->name);
1582         encode_string(xdr, newname->len, newname->name);
1583 }
1584
1585 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1586                          struct compound_hdr *hdr)
1587 {
1588         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1589         encode_uint64(xdr, clid);
1590 }
1591
1592 static void
1593 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1594 {
1595         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1596 }
1597
1598 static void
1599 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1600 {
1601         __be32 *p;
1602
1603         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1604         encode_nfs4_stateid(xdr, &zero_stateid);
1605         p = reserve_space(xdr, 2*4);
1606         *p++ = cpu_to_be32(1);
1607         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1608         BUG_ON(arg->acl_len % 4);
1609         p = reserve_space(xdr, 4);
1610         *p = cpu_to_be32(arg->acl_len);
1611         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1612 }
1613
1614 static void
1615 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1616 {
1617         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1618 }
1619
1620 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1621 {
1622         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1623         encode_nfs4_stateid(xdr, &arg->stateid);
1624         encode_attrs(xdr, arg->iap, server);
1625 }
1626
1627 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1628 {
1629         __be32 *p;
1630
1631         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1632         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1633
1634         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1635         p = reserve_space(xdr, 4);
1636         *p = cpu_to_be32(setclientid->sc_prog);
1637         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1638         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1639         p = reserve_space(xdr, 4);
1640         *p = cpu_to_be32(setclientid->sc_cb_ident);
1641 }
1642
1643 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1644 {
1645         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1646                         decode_setclientid_confirm_maxsz, hdr);
1647         encode_uint64(xdr, arg->clientid);
1648         encode_nfs4_verifier(xdr, &arg->confirm);
1649 }
1650
1651 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1652 {
1653         __be32 *p;
1654
1655         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1656         encode_open_stateid(xdr, args->context, args->lock_context,
1657                         FMODE_WRITE, hdr->minorversion);
1658
1659         p = reserve_space(xdr, 16);
1660         p = xdr_encode_hyper(p, args->offset);
1661         *p++ = cpu_to_be32(args->stable);
1662         *p = cpu_to_be32(args->count);
1663
1664         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1665 }
1666
1667 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1668 {
1669         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1670         encode_nfs4_stateid(xdr, stateid);
1671 }
1672
1673 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1674 {
1675         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1676         encode_string(xdr, name->len, name->name);
1677 }
1678
1679 #if defined(CONFIG_NFS_V4_1)
1680 /* NFSv4.1 operations */
1681 static void encode_exchange_id(struct xdr_stream *xdr,
1682                                struct nfs41_exchange_id_args *args,
1683                                struct compound_hdr *hdr)
1684 {
1685         __be32 *p;
1686         char impl_name[NFS4_OPAQUE_LIMIT];
1687         int len = 0;
1688
1689         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1690         encode_nfs4_verifier(xdr, args->verifier);
1691
1692         encode_string(xdr, args->id_len, args->id);
1693
1694         p = reserve_space(xdr, 12);
1695         *p++ = cpu_to_be32(args->flags);
1696         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1697
1698         if (send_implementation_id &&
1699             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1700             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1701                 <= NFS4_OPAQUE_LIMIT + 1)
1702                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1703                                utsname()->sysname, utsname()->release,
1704                                utsname()->version, utsname()->machine);
1705
1706         if (len > 0) {
1707                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1708
1709                 encode_string(xdr,
1710                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1711                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1712                 encode_string(xdr, len, impl_name);
1713                 /* just send zeros for nii_date - the date is in nii_name */
1714                 p = reserve_space(xdr, 12);
1715                 p = xdr_encode_hyper(p, 0);
1716                 *p = cpu_to_be32(0);
1717         } else
1718                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1719 }
1720
1721 static void encode_create_session(struct xdr_stream *xdr,
1722                                   struct nfs41_create_session_args *args,
1723                                   struct compound_hdr *hdr)
1724 {
1725         __be32 *p;
1726         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1727         uint32_t len;
1728         struct nfs_client *clp = args->client;
1729         u32 max_resp_sz_cached;
1730
1731         /*
1732          * Assumes OPEN is the biggest non-idempotent compound.
1733          * 2 is the verifier.
1734          */
1735         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1736                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1737
1738         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1739                         clp->cl_ipaddr);
1740
1741         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1742         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1743         p = xdr_encode_hyper(p, clp->cl_clientid);
1744         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1745         *p++ = cpu_to_be32(args->flags);                        /*flags */
1746
1747         /* Fore Channel */
1748         *p++ = cpu_to_be32(0);                          /* header padding size */
1749         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1750         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1751         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1752         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1753         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1754         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1755
1756         /* Back Channel */
1757         *p++ = cpu_to_be32(0);                          /* header padding size */
1758         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1759         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1760         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1761         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1762         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1763         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1764
1765         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1766         *p++ = cpu_to_be32(1);
1767         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1768
1769         /* authsys_parms rfc1831 */
1770         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1771         p = xdr_encode_opaque(p, machine_name, len);
1772         *p++ = cpu_to_be32(0);                          /* UID */
1773         *p++ = cpu_to_be32(0);                          /* GID */
1774         *p = cpu_to_be32(0);                            /* No more gids */
1775 }
1776
1777 static void encode_destroy_session(struct xdr_stream *xdr,
1778                                    struct nfs4_session *session,
1779                                    struct compound_hdr *hdr)
1780 {
1781         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1782         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1783 }
1784
1785 static void encode_reclaim_complete(struct xdr_stream *xdr,
1786                                     struct nfs41_reclaim_complete_args *args,
1787                                     struct compound_hdr *hdr)
1788 {
1789         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1790         encode_uint32(xdr, args->one_fs);
1791 }
1792 #endif /* CONFIG_NFS_V4_1 */
1793
1794 static void encode_sequence(struct xdr_stream *xdr,
1795                             const struct nfs4_sequence_args *args,
1796                             struct compound_hdr *hdr)
1797 {
1798 #if defined(CONFIG_NFS_V4_1)
1799         struct nfs4_session *session = args->sa_session;
1800         struct nfs4_slot_table *tp;
1801         struct nfs4_slot *slot;
1802         __be32 *p;
1803
1804         if (!session)
1805                 return;
1806
1807         tp = &session->fc_slot_table;
1808
1809         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1810         slot = tp->slots + args->sa_slotid;
1811
1812         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1813
1814         /*
1815          * Sessionid + seqid + slotid + max slotid + cache_this
1816          */
1817         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1818                 "max_slotid=%d cache_this=%d\n",
1819                 __func__,
1820                 ((u32 *)session->sess_id.data)[0],
1821                 ((u32 *)session->sess_id.data)[1],
1822                 ((u32 *)session->sess_id.data)[2],
1823                 ((u32 *)session->sess_id.data)[3],
1824                 slot->seq_nr, args->sa_slotid,
1825                 tp->highest_used_slotid, args->sa_cache_this);
1826         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1827         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1828         *p++ = cpu_to_be32(slot->seq_nr);
1829         *p++ = cpu_to_be32(args->sa_slotid);
1830         *p++ = cpu_to_be32(tp->highest_used_slotid);
1831         *p = cpu_to_be32(args->sa_cache_this);
1832 #endif /* CONFIG_NFS_V4_1 */
1833 }
1834
1835 #ifdef CONFIG_NFS_V4_1
1836 static void
1837 encode_getdevicelist(struct xdr_stream *xdr,
1838                      const struct nfs4_getdevicelist_args *args,
1839                      struct compound_hdr *hdr)
1840 {
1841         __be32 *p;
1842         nfs4_verifier dummy = {
1843                 .data = "dummmmmy",
1844         };
1845
1846         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1847         p = reserve_space(xdr, 16);
1848         *p++ = cpu_to_be32(args->layoutclass);
1849         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1850         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1851         encode_nfs4_verifier(xdr, &dummy);
1852 }
1853
1854 static void
1855 encode_getdeviceinfo(struct xdr_stream *xdr,
1856                      const struct nfs4_getdeviceinfo_args *args,
1857                      struct compound_hdr *hdr)
1858 {
1859         __be32 *p;
1860
1861         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1862         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1863         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1864                                     NFS4_DEVICEID4_SIZE);
1865         *p++ = cpu_to_be32(args->pdev->layout_type);
1866         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1867         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1868 }
1869
1870 static void
1871 encode_layoutget(struct xdr_stream *xdr,
1872                       const struct nfs4_layoutget_args *args,
1873                       struct compound_hdr *hdr)
1874 {
1875         __be32 *p;
1876
1877         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1878         p = reserve_space(xdr, 36);
1879         *p++ = cpu_to_be32(0);     /* Signal layout available */
1880         *p++ = cpu_to_be32(args->type);
1881         *p++ = cpu_to_be32(args->range.iomode);
1882         p = xdr_encode_hyper(p, args->range.offset);
1883         p = xdr_encode_hyper(p, args->range.length);
1884         p = xdr_encode_hyper(p, args->minlength);
1885         encode_nfs4_stateid(xdr, &args->stateid);
1886         encode_uint32(xdr, args->maxcount);
1887
1888         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1889                 __func__,
1890                 args->type,
1891                 args->range.iomode,
1892                 (unsigned long)args->range.offset,
1893                 (unsigned long)args->range.length,
1894                 args->maxcount);
1895 }
1896
1897 static int
1898 encode_layoutcommit(struct xdr_stream *xdr,
1899                     struct inode *inode,
1900                     const struct nfs4_layoutcommit_args *args,
1901                     struct compound_hdr *hdr)
1902 {
1903         __be32 *p;
1904
1905         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1906                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1907
1908         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1909         p = reserve_space(xdr, 20);
1910         /* Only whole file layouts */
1911         p = xdr_encode_hyper(p, 0); /* offset */
1912         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1913         *p = cpu_to_be32(0); /* reclaim */
1914         encode_nfs4_stateid(xdr, &args->stateid);
1915         p = reserve_space(xdr, 20);
1916         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1917         p = xdr_encode_hyper(p, args->lastbytewritten);
1918         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1919         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1920
1921         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1922                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1923                         NFS_I(inode)->layout, xdr, args);
1924         else
1925                 encode_uint32(xdr, 0); /* no layout-type payload */
1926
1927         return 0;
1928 }
1929
1930 static void
1931 encode_layoutreturn(struct xdr_stream *xdr,
1932                     const struct nfs4_layoutreturn_args *args,
1933                     struct compound_hdr *hdr)
1934 {
1935         __be32 *p;
1936
1937         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1938         p = reserve_space(xdr, 16);
1939         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1940         *p++ = cpu_to_be32(args->layout_type);
1941         *p++ = cpu_to_be32(IOMODE_ANY);
1942         *p = cpu_to_be32(RETURN_FILE);
1943         p = reserve_space(xdr, 16);
1944         p = xdr_encode_hyper(p, 0);
1945         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1946         spin_lock(&args->inode->i_lock);
1947         encode_nfs4_stateid(xdr, &args->stateid);
1948         spin_unlock(&args->inode->i_lock);
1949         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1950                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1951                         NFS_I(args->inode)->layout, xdr, args);
1952         } else
1953                 encode_uint32(xdr, 0);
1954 }
1955
1956 static int
1957 encode_secinfo_no_name(struct xdr_stream *xdr,
1958                        const struct nfs41_secinfo_no_name_args *args,
1959                        struct compound_hdr *hdr)
1960 {
1961         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1962         encode_uint32(xdr, args->style);
1963         return 0;
1964 }
1965
1966 static void encode_test_stateid(struct xdr_stream *xdr,
1967                                 struct nfs41_test_stateid_args *args,
1968                                 struct compound_hdr *hdr)
1969 {
1970         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
1971         encode_uint32(xdr, 1);
1972         encode_nfs4_stateid(xdr, args->stateid);
1973 }
1974
1975 static void encode_free_stateid(struct xdr_stream *xdr,
1976                                 struct nfs41_free_stateid_args *args,
1977                                 struct compound_hdr *hdr)
1978 {
1979         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
1980         encode_nfs4_stateid(xdr, args->stateid);
1981 }
1982 #endif /* CONFIG_NFS_V4_1 */
1983
1984 /*
1985  * END OF "GENERIC" ENCODE ROUTINES.
1986  */
1987
1988 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1989 {
1990 #if defined(CONFIG_NFS_V4_1)
1991         if (args->sa_session)
1992                 return args->sa_session->clp->cl_mvops->minor_version;
1993 #endif /* CONFIG_NFS_V4_1 */
1994         return 0;
1995 }
1996
1997 /*
1998  * Encode an ACCESS request
1999  */
2000 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2001                                 const struct nfs4_accessargs *args)
2002 {
2003         struct compound_hdr hdr = {
2004                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2005         };
2006
2007         encode_compound_hdr(xdr, req, &hdr);
2008         encode_sequence(xdr, &args->seq_args, &hdr);
2009         encode_putfh(xdr, args->fh, &hdr);
2010         encode_access(xdr, args->access, &hdr);
2011         encode_getfattr(xdr, args->bitmask, &hdr);
2012         encode_nops(&hdr);
2013 }
2014
2015 /*
2016  * Encode LOOKUP request
2017  */
2018 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2019                                 const struct nfs4_lookup_arg *args)
2020 {
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         encode_compound_hdr(xdr, req, &hdr);
2026         encode_sequence(xdr, &args->seq_args, &hdr);
2027         encode_putfh(xdr, args->dir_fh, &hdr);
2028         encode_lookup(xdr, args->name, &hdr);
2029         encode_getfh(xdr, &hdr);
2030         encode_getfattr(xdr, args->bitmask, &hdr);
2031         encode_nops(&hdr);
2032 }
2033
2034 /*
2035  * Encode LOOKUP_ROOT request
2036  */
2037 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2038                                      struct xdr_stream *xdr,
2039                                      const struct nfs4_lookup_root_arg *args)
2040 {
2041         struct compound_hdr hdr = {
2042                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2043         };
2044
2045         encode_compound_hdr(xdr, req, &hdr);
2046         encode_sequence(xdr, &args->seq_args, &hdr);
2047         encode_putrootfh(xdr, &hdr);
2048         encode_getfh(xdr, &hdr);
2049         encode_getfattr(xdr, args->bitmask, &hdr);
2050         encode_nops(&hdr);
2051 }
2052
2053 /*
2054  * Encode REMOVE request
2055  */
2056 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2057                                 const struct nfs_removeargs *args)
2058 {
2059         struct compound_hdr hdr = {
2060                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2061         };
2062
2063         encode_compound_hdr(xdr, req, &hdr);
2064         encode_sequence(xdr, &args->seq_args, &hdr);
2065         encode_putfh(xdr, args->fh, &hdr);
2066         encode_remove(xdr, &args->name, &hdr);
2067         encode_getfattr(xdr, args->bitmask, &hdr);
2068         encode_nops(&hdr);
2069 }
2070
2071 /*
2072  * Encode RENAME request
2073  */
2074 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2075                                 const struct nfs_renameargs *args)
2076 {
2077         struct compound_hdr hdr = {
2078                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2079         };
2080
2081         encode_compound_hdr(xdr, req, &hdr);
2082         encode_sequence(xdr, &args->seq_args, &hdr);
2083         encode_putfh(xdr, args->old_dir, &hdr);
2084         encode_savefh(xdr, &hdr);
2085         encode_putfh(xdr, args->new_dir, &hdr);
2086         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2087         encode_getfattr(xdr, args->bitmask, &hdr);
2088         encode_restorefh(xdr, &hdr);
2089         encode_getfattr(xdr, args->bitmask, &hdr);
2090         encode_nops(&hdr);
2091 }
2092
2093 /*
2094  * Encode LINK request
2095  */
2096 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2097                              const struct nfs4_link_arg *args)
2098 {
2099         struct compound_hdr hdr = {
2100                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101         };
2102
2103         encode_compound_hdr(xdr, req, &hdr);
2104         encode_sequence(xdr, &args->seq_args, &hdr);
2105         encode_putfh(xdr, args->fh, &hdr);
2106         encode_savefh(xdr, &hdr);
2107         encode_putfh(xdr, args->dir_fh, &hdr);
2108         encode_link(xdr, args->name, &hdr);
2109         encode_getfattr(xdr, args->bitmask, &hdr);
2110         encode_restorefh(xdr, &hdr);
2111         encode_getfattr(xdr, args->bitmask, &hdr);
2112         encode_nops(&hdr);
2113 }
2114
2115 /*
2116  * Encode CREATE request
2117  */
2118 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2119                                 const struct nfs4_create_arg *args)
2120 {
2121         struct compound_hdr hdr = {
2122                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123         };
2124
2125         encode_compound_hdr(xdr, req, &hdr);
2126         encode_sequence(xdr, &args->seq_args, &hdr);
2127         encode_putfh(xdr, args->dir_fh, &hdr);
2128         encode_savefh(xdr, &hdr);
2129         encode_create(xdr, args, &hdr);
2130         encode_getfh(xdr, &hdr);
2131         encode_getfattr(xdr, args->bitmask, &hdr);
2132         encode_restorefh(xdr, &hdr);
2133         encode_getfattr(xdr, args->bitmask, &hdr);
2134         encode_nops(&hdr);
2135 }
2136
2137 /*
2138  * Encode SYMLINK request
2139  */
2140 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2141                                  const struct nfs4_create_arg *args)
2142 {
2143         nfs4_xdr_enc_create(req, xdr, args);
2144 }
2145
2146 /*
2147  * Encode GETATTR request
2148  */
2149 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2150                                  const struct nfs4_getattr_arg *args)
2151 {
2152         struct compound_hdr hdr = {
2153                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154         };
2155
2156         encode_compound_hdr(xdr, req, &hdr);
2157         encode_sequence(xdr, &args->seq_args, &hdr);
2158         encode_putfh(xdr, args->fh, &hdr);
2159         encode_getfattr(xdr, args->bitmask, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode a CLOSE request
2165  */
2166 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                                struct nfs_closeargs *args)
2168 {
2169         struct compound_hdr hdr = {
2170                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2171         };
2172
2173         encode_compound_hdr(xdr, req, &hdr);
2174         encode_sequence(xdr, &args->seq_args, &hdr);
2175         encode_putfh(xdr, args->fh, &hdr);
2176         encode_close(xdr, args, &hdr);
2177         encode_getfattr(xdr, args->bitmask, &hdr);
2178         encode_nops(&hdr);
2179 }
2180
2181 /*
2182  * Encode an OPEN request
2183  */
2184 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2185                               struct nfs_openargs *args)
2186 {
2187         struct compound_hdr hdr = {
2188                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2189         };
2190
2191         encode_compound_hdr(xdr, req, &hdr);
2192         encode_sequence(xdr, &args->seq_args, &hdr);
2193         encode_putfh(xdr, args->fh, &hdr);
2194         encode_savefh(xdr, &hdr);
2195         encode_open(xdr, args, &hdr);
2196         encode_getfh(xdr, &hdr);
2197         encode_getfattr(xdr, args->bitmask, &hdr);
2198         encode_restorefh(xdr, &hdr);
2199         encode_getfattr(xdr, args->dir_bitmask, &hdr);
2200         encode_nops(&hdr);
2201 }
2202
2203 /*
2204  * Encode an OPEN_CONFIRM request
2205  */
2206 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2207                                       struct xdr_stream *xdr,
2208                                       struct nfs_open_confirmargs *args)
2209 {
2210         struct compound_hdr hdr = {
2211                 .nops   = 0,
2212         };
2213
2214         encode_compound_hdr(xdr, req, &hdr);
2215         encode_putfh(xdr, args->fh, &hdr);
2216         encode_open_confirm(xdr, args, &hdr);
2217         encode_nops(&hdr);
2218 }
2219
2220 /*
2221  * Encode an OPEN request with no attributes.
2222  */
2223 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2224                                      struct xdr_stream *xdr,
2225                                      struct nfs_openargs *args)
2226 {
2227         struct compound_hdr hdr = {
2228                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2229         };
2230
2231         encode_compound_hdr(xdr, req, &hdr);
2232         encode_sequence(xdr, &args->seq_args, &hdr);
2233         encode_putfh(xdr, args->fh, &hdr);
2234         encode_open(xdr, args, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode an OPEN_DOWNGRADE request
2241  */
2242 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2243                                         struct xdr_stream *xdr,
2244                                         struct nfs_closeargs *args)
2245 {
2246         struct compound_hdr hdr = {
2247                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2248         };
2249
2250         encode_compound_hdr(xdr, req, &hdr);
2251         encode_sequence(xdr, &args->seq_args, &hdr);
2252         encode_putfh(xdr, args->fh, &hdr);
2253         encode_open_downgrade(xdr, args, &hdr);
2254         encode_getfattr(xdr, args->bitmask, &hdr);
2255         encode_nops(&hdr);
2256 }
2257
2258 /*
2259  * Encode a LOCK request
2260  */
2261 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2262                               struct nfs_lock_args *args)
2263 {
2264         struct compound_hdr hdr = {
2265                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2266         };
2267
2268         encode_compound_hdr(xdr, req, &hdr);
2269         encode_sequence(xdr, &args->seq_args, &hdr);
2270         encode_putfh(xdr, args->fh, &hdr);
2271         encode_lock(xdr, args, &hdr);
2272         encode_nops(&hdr);
2273 }
2274
2275 /*
2276  * Encode a LOCKT request
2277  */
2278 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2279                                struct nfs_lockt_args *args)
2280 {
2281         struct compound_hdr hdr = {
2282                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2283         };
2284
2285         encode_compound_hdr(xdr, req, &hdr);
2286         encode_sequence(xdr, &args->seq_args, &hdr);
2287         encode_putfh(xdr, args->fh, &hdr);
2288         encode_lockt(xdr, args, &hdr);
2289         encode_nops(&hdr);
2290 }
2291
2292 /*
2293  * Encode a LOCKU request
2294  */
2295 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2296                                struct nfs_locku_args *args)
2297 {
2298         struct compound_hdr hdr = {
2299                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2300         };
2301
2302         encode_compound_hdr(xdr, req, &hdr);
2303         encode_sequence(xdr, &args->seq_args, &hdr);
2304         encode_putfh(xdr, args->fh, &hdr);
2305         encode_locku(xdr, args, &hdr);
2306         encode_nops(&hdr);
2307 }
2308
2309 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2310                                            struct xdr_stream *xdr,
2311                                         struct nfs_release_lockowner_args *args)
2312 {
2313         struct compound_hdr hdr = {
2314                 .minorversion = 0,
2315         };
2316
2317         encode_compound_hdr(xdr, req, &hdr);
2318         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode a READLINK request
2324  */
2325 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2326                                   const struct nfs4_readlink *args)
2327 {
2328         struct compound_hdr hdr = {
2329                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2330         };
2331
2332         encode_compound_hdr(xdr, req, &hdr);
2333         encode_sequence(xdr, &args->seq_args, &hdr);
2334         encode_putfh(xdr, args->fh, &hdr);
2335         encode_readlink(xdr, args, req, &hdr);
2336
2337         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2338                         args->pgbase, args->pglen);
2339         encode_nops(&hdr);
2340 }
2341
2342 /*
2343  * Encode a READDIR request
2344  */
2345 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2346                                  const struct nfs4_readdir_arg *args)
2347 {
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_readdir(xdr, args, req, &hdr);
2356
2357         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2358                          args->pgbase, args->count);
2359         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2360                         __func__, hdr.replen << 2, args->pages,
2361                         args->pgbase, args->count);
2362         encode_nops(&hdr);
2363 }
2364
2365 /*
2366  * Encode a READ request
2367  */
2368 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2369                               struct nfs_readargs *args)
2370 {
2371         struct compound_hdr hdr = {
2372                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2373         };
2374
2375         encode_compound_hdr(xdr, req, &hdr);
2376         encode_sequence(xdr, &args->seq_args, &hdr);
2377         encode_putfh(xdr, args->fh, &hdr);
2378         encode_read(xdr, args, &hdr);
2379
2380         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2381                          args->pages, args->pgbase, args->count);
2382         req->rq_rcv_buf.flags |= XDRBUF_READ;
2383         encode_nops(&hdr);
2384 }
2385
2386 /*
2387  * Encode an SETATTR request
2388  */
2389 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2390                                  struct nfs_setattrargs *args)
2391 {
2392         struct compound_hdr hdr = {
2393                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2394         };
2395
2396         encode_compound_hdr(xdr, req, &hdr);
2397         encode_sequence(xdr, &args->seq_args, &hdr);
2398         encode_putfh(xdr, args->fh, &hdr);
2399         encode_setattr(xdr, args, args->server, &hdr);
2400         encode_getfattr(xdr, args->bitmask, &hdr);
2401         encode_nops(&hdr);
2402 }
2403
2404 /*
2405  * Encode a GETACL request
2406  */
2407 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2408                                 struct nfs_getaclargs *args)
2409 {
2410         struct compound_hdr hdr = {
2411                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2412         };
2413         uint32_t replen;
2414
2415         encode_compound_hdr(xdr, req, &hdr);
2416         encode_sequence(xdr, &args->seq_args, &hdr);
2417         encode_putfh(xdr, args->fh, &hdr);
2418         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2419         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2420
2421         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2422                 args->acl_pages, args->acl_pgbase, args->acl_len);
2423
2424         encode_nops(&hdr);
2425 }
2426
2427 /*
2428  * Encode a WRITE request
2429  */
2430 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2431                                struct nfs_writeargs *args)
2432 {
2433         struct compound_hdr hdr = {
2434                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2435         };
2436
2437         encode_compound_hdr(xdr, req, &hdr);
2438         encode_sequence(xdr, &args->seq_args, &hdr);
2439         encode_putfh(xdr, args->fh, &hdr);
2440         encode_write(xdr, args, &hdr);
2441         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2442         if (args->bitmask)
2443                 encode_getfattr(xdr, args->bitmask, &hdr);
2444         encode_nops(&hdr);
2445 }
2446
2447 /*
2448  *  a COMMIT request
2449  */
2450 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                                 struct nfs_writeargs *args)
2452 {
2453         struct compound_hdr hdr = {
2454                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455         };
2456
2457         encode_compound_hdr(xdr, req, &hdr);
2458         encode_sequence(xdr, &args->seq_args, &hdr);
2459         encode_putfh(xdr, args->fh, &hdr);
2460         encode_commit(xdr, args, &hdr);
2461         if (args->bitmask)
2462                 encode_getfattr(xdr, args->bitmask, &hdr);
2463         encode_nops(&hdr);
2464 }
2465
2466 /*
2467  * FSINFO request
2468  */
2469 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2470                                 struct nfs4_fsinfo_arg *args)
2471 {
2472         struct compound_hdr hdr = {
2473                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2474         };
2475
2476         encode_compound_hdr(xdr, req, &hdr);
2477         encode_sequence(xdr, &args->seq_args, &hdr);
2478         encode_putfh(xdr, args->fh, &hdr);
2479         encode_fsinfo(xdr, args->bitmask, &hdr);
2480         encode_nops(&hdr);
2481 }
2482
2483 /*
2484  * a PATHCONF request
2485  */
2486 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2487                                   const struct nfs4_pathconf_arg *args)
2488 {
2489         struct compound_hdr hdr = {
2490                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2491         };
2492
2493         encode_compound_hdr(xdr, req, &hdr);
2494         encode_sequence(xdr, &args->seq_args, &hdr);
2495         encode_putfh(xdr, args->fh, &hdr);
2496         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2497                            &hdr);
2498         encode_nops(&hdr);
2499 }
2500
2501 /*
2502  * a STATFS request
2503  */
2504 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2505                                 const struct nfs4_statfs_arg *args)
2506 {
2507         struct compound_hdr hdr = {
2508                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2509         };
2510
2511         encode_compound_hdr(xdr, req, &hdr);
2512         encode_sequence(xdr, &args->seq_args, &hdr);
2513         encode_putfh(xdr, args->fh, &hdr);
2514         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2515                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2516         encode_nops(&hdr);
2517 }
2518
2519 /*
2520  * GETATTR_BITMAP request
2521  */
2522 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2523                                      struct xdr_stream *xdr,
2524                                      struct nfs4_server_caps_arg *args)
2525 {
2526         struct compound_hdr hdr = {
2527                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2528         };
2529
2530         encode_compound_hdr(xdr, req, &hdr);
2531         encode_sequence(xdr, &args->seq_args, &hdr);
2532         encode_putfh(xdr, args->fhandle, &hdr);
2533         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2534                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2535                            FATTR4_WORD0_LINK_SUPPORT|
2536                            FATTR4_WORD0_SYMLINK_SUPPORT|
2537                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2538         encode_nops(&hdr);
2539 }
2540
2541 /*
2542  * a RENEW request
2543  */
2544 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2545                                struct nfs_client *clp)
2546 {
2547         struct compound_hdr hdr = {
2548                 .nops   = 0,
2549         };
2550
2551         encode_compound_hdr(xdr, req, &hdr);
2552         encode_renew(xdr, clp->cl_clientid, &hdr);
2553         encode_nops(&hdr);
2554 }
2555
2556 /*
2557  * a SETCLIENTID request
2558  */
2559 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2560                                      struct xdr_stream *xdr,
2561                                      struct nfs4_setclientid *sc)
2562 {
2563         struct compound_hdr hdr = {
2564                 .nops   = 0,
2565         };
2566
2567         encode_compound_hdr(xdr, req, &hdr);
2568         encode_setclientid(xdr, sc, &hdr);
2569         encode_nops(&hdr);
2570 }
2571
2572 /*
2573  * a SETCLIENTID_CONFIRM request
2574  */
2575 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2576                                              struct xdr_stream *xdr,
2577                                              struct nfs4_setclientid_res *arg)
2578 {
2579         struct compound_hdr hdr = {
2580                 .nops   = 0,
2581         };
2582         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2583
2584         encode_compound_hdr(xdr, req, &hdr);
2585         encode_setclientid_confirm(xdr, arg, &hdr);
2586         encode_putrootfh(xdr, &hdr);
2587         encode_fsinfo(xdr, lease_bitmap, &hdr);
2588         encode_nops(&hdr);
2589 }
2590
2591 /*
2592  * DELEGRETURN request
2593  */
2594 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2595                                      struct xdr_stream *xdr,
2596                                      const struct nfs4_delegreturnargs *args)
2597 {
2598         struct compound_hdr hdr = {
2599                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2600         };
2601
2602         encode_compound_hdr(xdr, req, &hdr);
2603         encode_sequence(xdr, &args->seq_args, &hdr);
2604         encode_putfh(xdr, args->fhandle, &hdr);
2605         encode_delegreturn(xdr, args->stateid, &hdr);
2606         encode_getfattr(xdr, args->bitmask, &hdr);
2607         encode_nops(&hdr);
2608 }
2609
2610 /*
2611  * Encode FS_LOCATIONS request
2612  */
2613 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2614                                       struct xdr_stream *xdr,
2615                                       struct nfs4_fs_locations_arg *args)
2616 {
2617         struct compound_hdr hdr = {
2618                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2619         };
2620         uint32_t replen;
2621
2622         encode_compound_hdr(xdr, req, &hdr);
2623         encode_sequence(xdr, &args->seq_args, &hdr);
2624         encode_putfh(xdr, args->dir_fh, &hdr);
2625         encode_lookup(xdr, args->name, &hdr);
2626         replen = hdr.replen;    /* get the attribute into args->page */
2627         encode_fs_locations(xdr, args->bitmask, &hdr);
2628
2629         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2630                         0, PAGE_SIZE);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * Encode SECINFO request
2636  */
2637 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2638                                 struct xdr_stream *xdr,
2639                                 struct nfs4_secinfo_arg *args)
2640 {
2641         struct compound_hdr hdr = {
2642                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643         };
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_sequence(xdr, &args->seq_args, &hdr);
2647         encode_putfh(xdr, args->dir_fh, &hdr);
2648         encode_secinfo(xdr, args->name, &hdr);
2649         encode_nops(&hdr);
2650 }
2651
2652 #if defined(CONFIG_NFS_V4_1)
2653 /*
2654  * EXCHANGE_ID request
2655  */
2656 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2657                                      struct xdr_stream *xdr,
2658                                      struct nfs41_exchange_id_args *args)
2659 {
2660         struct compound_hdr hdr = {
2661                 .minorversion = args->client->cl_mvops->minor_version,
2662         };
2663
2664         encode_compound_hdr(xdr, req, &hdr);
2665         encode_exchange_id(xdr, args, &hdr);
2666         encode_nops(&hdr);
2667 }
2668
2669 /*
2670  * a CREATE_SESSION request
2671  */
2672 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2673                                         struct xdr_stream *xdr,
2674                                         struct nfs41_create_session_args *args)
2675 {
2676         struct compound_hdr hdr = {
2677                 .minorversion = args->client->cl_mvops->minor_version,
2678         };
2679
2680         encode_compound_hdr(xdr, req, &hdr);
2681         encode_create_session(xdr, args, &hdr);
2682         encode_nops(&hdr);
2683 }
2684
2685 /*
2686  * a DESTROY_SESSION request
2687  */
2688 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2689                                          struct xdr_stream *xdr,
2690                                          struct nfs4_session *session)
2691 {
2692         struct compound_hdr hdr = {
2693                 .minorversion = session->clp->cl_mvops->minor_version,
2694         };
2695
2696         encode_compound_hdr(xdr, req, &hdr);
2697         encode_destroy_session(xdr, session, &hdr);
2698         encode_nops(&hdr);
2699 }
2700
2701 /*
2702  * a SEQUENCE request
2703  */
2704 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2705                                   struct nfs4_sequence_args *args)
2706 {
2707         struct compound_hdr hdr = {
2708                 .minorversion = nfs4_xdr_minorversion(args),
2709         };
2710
2711         encode_compound_hdr(xdr, req, &hdr);
2712         encode_sequence(xdr, args, &hdr);
2713         encode_nops(&hdr);
2714 }
2715
2716 /*
2717  * a GET_LEASE_TIME request
2718  */
2719 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2720                                         struct xdr_stream *xdr,
2721                                         struct nfs4_get_lease_time_args *args)
2722 {
2723         struct compound_hdr hdr = {
2724                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2725         };
2726         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2727
2728         encode_compound_hdr(xdr, req, &hdr);
2729         encode_sequence(xdr, &args->la_seq_args, &hdr);
2730         encode_putrootfh(xdr, &hdr);
2731         encode_fsinfo(xdr, lease_bitmap, &hdr);
2732         encode_nops(&hdr);
2733 }
2734
2735 /*
2736  * a RECLAIM_COMPLETE request
2737  */
2738 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2739                                           struct xdr_stream *xdr,
2740                                 struct nfs41_reclaim_complete_args *args)
2741 {
2742         struct compound_hdr hdr = {
2743                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2744         };
2745
2746         encode_compound_hdr(xdr, req, &hdr);
2747         encode_sequence(xdr, &args->seq_args, &hdr);
2748         encode_reclaim_complete(xdr, args, &hdr);
2749         encode_nops(&hdr);
2750 }
2751
2752 /*
2753  * Encode GETDEVICELIST request
2754  */
2755 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2756                                        struct xdr_stream *xdr,
2757                                        struct nfs4_getdevicelist_args *args)
2758 {
2759         struct compound_hdr hdr = {
2760                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2761         };
2762
2763         encode_compound_hdr(xdr, req, &hdr);
2764         encode_sequence(xdr, &args->seq_args, &hdr);
2765         encode_putfh(xdr, args->fh, &hdr);
2766         encode_getdevicelist(xdr, args, &hdr);
2767         encode_nops(&hdr);
2768 }
2769
2770 /*
2771  * Encode GETDEVICEINFO request
2772  */
2773 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2774                                        struct xdr_stream *xdr,
2775                                        struct nfs4_getdeviceinfo_args *args)
2776 {
2777         struct compound_hdr hdr = {
2778                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2779         };
2780
2781         encode_compound_hdr(xdr, req, &hdr);
2782         encode_sequence(xdr, &args->seq_args, &hdr);
2783         encode_getdeviceinfo(xdr, args, &hdr);
2784
2785         /* set up reply kvec. Subtract notification bitmap max size (2)
2786          * so that notification bitmap is put in xdr_buf tail */
2787         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2788                          args->pdev->pages, args->pdev->pgbase,
2789                          args->pdev->pglen);
2790
2791         encode_nops(&hdr);
2792 }
2793
2794 /*
2795  *  Encode LAYOUTGET request
2796  */
2797 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2798                                    struct xdr_stream *xdr,
2799                                    struct nfs4_layoutget_args *args)
2800 {
2801         struct compound_hdr hdr = {
2802                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2803         };
2804
2805         encode_compound_hdr(xdr, req, &hdr);
2806         encode_sequence(xdr, &args->seq_args, &hdr);
2807         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2808         encode_layoutget(xdr, args, &hdr);
2809
2810         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2811             args->layout.pages, 0, args->layout.pglen);
2812
2813         encode_nops(&hdr);
2814 }
2815
2816 /*
2817  *  Encode LAYOUTCOMMIT request
2818  */
2819 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2820                                       struct xdr_stream *xdr,
2821                                       struct nfs4_layoutcommit_args *args)
2822 {
2823         struct nfs4_layoutcommit_data *data =
2824                 container_of(args, struct nfs4_layoutcommit_data, args);
2825         struct compound_hdr hdr = {
2826                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827         };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_sequence(xdr, &args->seq_args, &hdr);
2831         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2832         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2833         encode_getfattr(xdr, args->bitmask, &hdr);
2834         encode_nops(&hdr);
2835 }
2836
2837 /*
2838  * Encode LAYOUTRETURN request
2839  */
2840 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2841                                       struct xdr_stream *xdr,
2842                                       struct nfs4_layoutreturn_args *args)
2843 {
2844         struct compound_hdr hdr = {
2845                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2846         };
2847
2848         encode_compound_hdr(xdr, req, &hdr);
2849         encode_sequence(xdr, &args->seq_args, &hdr);
2850         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2851         encode_layoutreturn(xdr, args, &hdr);
2852         encode_nops(&hdr);
2853 }
2854
2855 /*
2856  * Encode SECINFO_NO_NAME request
2857  */
2858 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2859                                         struct xdr_stream *xdr,
2860                                         struct nfs41_secinfo_no_name_args *args)
2861 {
2862         struct compound_hdr hdr = {
2863                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2864         };
2865
2866         encode_compound_hdr(xdr, req, &hdr);
2867         encode_sequence(xdr, &args->seq_args, &hdr);
2868         encode_putrootfh(xdr, &hdr);
2869         encode_secinfo_no_name(xdr, args, &hdr);
2870         encode_nops(&hdr);
2871         return 0;
2872 }
2873
2874 /*
2875  *  Encode TEST_STATEID request
2876  */
2877 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2878                                       struct xdr_stream *xdr,
2879                                       struct nfs41_test_stateid_args *args)
2880 {
2881         struct compound_hdr hdr = {
2882                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883         };
2884
2885         encode_compound_hdr(xdr, req, &hdr);
2886         encode_sequence(xdr, &args->seq_args, &hdr);
2887         encode_test_stateid(xdr, args, &hdr);
2888         encode_nops(&hdr);
2889 }
2890
2891 /*
2892  *  Encode FREE_STATEID request
2893  */
2894 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2895                                      struct xdr_stream *xdr,
2896                                      struct nfs41_free_stateid_args *args)
2897 {
2898         struct compound_hdr hdr = {
2899                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2900         };
2901
2902         encode_compound_hdr(xdr, req, &hdr);
2903         encode_sequence(xdr, &args->seq_args, &hdr);
2904         encode_free_stateid(xdr, args, &hdr);
2905         encode_nops(&hdr);
2906 }
2907 #endif /* CONFIG_NFS_V4_1 */
2908
2909 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2910 {
2911         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2912                 "Remaining buffer length is %tu words.\n",
2913                 func, xdr->end - xdr->p);
2914 }
2915
2916 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2917 {
2918         __be32 *p;
2919
2920         p = xdr_inline_decode(xdr, 4);
2921         if (unlikely(!p))
2922                 goto out_overflow;
2923         *len = be32_to_cpup(p);
2924         p = xdr_inline_decode(xdr, *len);
2925         if (unlikely(!p))
2926                 goto out_overflow;
2927         *string = (char *)p;
2928         return 0;
2929 out_overflow:
2930         print_overflow_msg(__func__, xdr);
2931         return -EIO;
2932 }
2933
2934 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2935 {
2936         __be32 *p;
2937
2938         p = xdr_inline_decode(xdr, 8);
2939         if (unlikely(!p))
2940                 goto out_overflow;
2941         hdr->status = be32_to_cpup(p++);
2942         hdr->taglen = be32_to_cpup(p);
2943
2944         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2945         if (unlikely(!p))
2946                 goto out_overflow;
2947         hdr->tag = (char *)p;
2948         p += XDR_QUADLEN(hdr->taglen);
2949         hdr->nops = be32_to_cpup(p);
2950         if (unlikely(hdr->nops < 1))
2951                 return nfs4_stat_to_errno(hdr->status);
2952         return 0;
2953 out_overflow:
2954         print_overflow_msg(__func__, xdr);
2955         return -EIO;
2956 }
2957
2958 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2959 {
2960         __be32 *p;
2961         uint32_t opnum;
2962         int32_t nfserr;
2963
2964         p = xdr_inline_decode(xdr, 8);
2965         if (unlikely(!p))
2966                 goto out_overflow;
2967         opnum = be32_to_cpup(p++);
2968         if (opnum != expected) {
2969                 dprintk("nfs: Server returned operation"
2970                         " %d but we issued a request for %d\n",
2971                                 opnum, expected);
2972                 return -EIO;
2973         }
2974         nfserr = be32_to_cpup(p);
2975         if (nfserr != NFS_OK)
2976                 return nfs4_stat_to_errno(nfserr);
2977         return 0;
2978 out_overflow:
2979         print_overflow_msg(__func__, xdr);
2980         return -EIO;
2981 }
2982
2983 /* Dummy routine */
2984 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2985 {
2986         __be32 *p;
2987         unsigned int strlen;
2988         char *str;
2989
2990         p = xdr_inline_decode(xdr, 12);
2991         if (likely(p))
2992                 return decode_opaque_inline(xdr, &strlen, &str);
2993         print_overflow_msg(__func__, xdr);
2994         return -EIO;
2995 }
2996
2997 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2998 {
2999         uint32_t bmlen;
3000         __be32 *p;
3001
3002         p = xdr_inline_decode(xdr, 4);
3003         if (unlikely(!p))
3004                 goto out_overflow;
3005         bmlen = be32_to_cpup(p);
3006
3007         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3008         p = xdr_inline_decode(xdr, (bmlen << 2));
3009         if (unlikely(!p))
3010                 goto out_overflow;
3011         if (bmlen > 0) {
3012                 bitmap[0] = be32_to_cpup(p++);
3013                 if (bmlen > 1) {
3014                         bitmap[1] = be32_to_cpup(p++);
3015                         if (bmlen > 2)
3016                                 bitmap[2] = be32_to_cpup(p);
3017                 }
3018         }
3019         return 0;
3020 out_overflow:
3021         print_overflow_msg(__func__, xdr);
3022         return -EIO;
3023 }
3024
3025 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3026 {
3027         __be32 *p;
3028
3029         p = xdr_inline_decode(xdr, 4);
3030         if (unlikely(!p))
3031                 goto out_overflow;
3032         *attrlen = be32_to_cpup(p);
3033         *savep = xdr->p;
3034         return 0;
3035 out_overflow:
3036         print_overflow_msg(__func__, xdr);
3037         return -EIO;
3038 }
3039
3040 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3041 {
3042         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3043                 int ret;
3044                 ret = decode_attr_bitmap(xdr, bitmask);
3045                 if (unlikely(ret < 0))
3046                         return ret;
3047                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3048         } else
3049                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3050         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3051                 bitmask[0], bitmask[1], bitmask[2]);
3052         return 0;
3053 }
3054
3055 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3056 {
3057         __be32 *p;
3058         int ret = 0;
3059
3060         *type = 0;
3061         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3062                 return -EIO;
3063         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3064                 p = xdr_inline_decode(xdr, 4);
3065                 if (unlikely(!p))
3066                         goto out_overflow;
3067                 *type = be32_to_cpup(p);
3068                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3069                         dprintk("%s: bad type %d\n", __func__, *type);
3070                         return -EIO;
3071                 }
3072                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3073                 ret = NFS_ATTR_FATTR_TYPE;
3074         }
3075         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3076         return ret;
3077 out_overflow:
3078         print_overflow_msg(__func__, xdr);
3079         return -EIO;
3080 }
3081
3082 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3083                                       uint32_t *bitmap, uint32_t *type)
3084 {
3085         __be32 *p;
3086
3087         *type = 0;
3088         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3089                 return -EIO;
3090         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3091                 p = xdr_inline_decode(xdr, 4);
3092                 if (unlikely(!p))
3093                         goto out_overflow;
3094                 *type = be32_to_cpup(p);
3095                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3096         }
3097         dprintk("%s: expire type=0x%x\n", __func__, *type);
3098         return 0;
3099 out_overflow:
3100         print_overflow_msg(__func__, xdr);
3101         return -EIO;
3102 }
3103
3104 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3105 {
3106         __be32 *p;
3107         int ret = 0;
3108
3109         *change = 0;
3110         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3111                 return -EIO;
3112         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3113                 p = xdr_inline_decode(xdr, 8);
3114                 if (unlikely(!p))
3115                         goto out_overflow;
3116                 xdr_decode_hyper(p, change);
3117                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3118                 ret = NFS_ATTR_FATTR_CHANGE;
3119         }
3120         dprintk("%s: change attribute=%Lu\n", __func__,
3121                         (unsigned long long)*change);
3122         return ret;
3123 out_overflow:
3124         print_overflow_msg(__func__, xdr);
3125         return -EIO;
3126 }
3127
3128 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3129 {
3130         __be32 *p;
3131         int ret = 0;
3132
3133         *size = 0;
3134         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3135                 return -EIO;
3136         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3137                 p = xdr_inline_decode(xdr, 8);
3138                 if (unlikely(!p))
3139                         goto out_overflow;
3140                 xdr_decode_hyper(p, size);
3141                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3142                 ret = NFS_ATTR_FATTR_SIZE;
3143         }
3144         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3145         return ret;
3146 out_overflow:
3147         print_overflow_msg(__func__, xdr);
3148         return -EIO;
3149 }
3150
3151 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3152 {
3153         __be32 *p;
3154
3155         *res = 0;
3156         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3157                 return -EIO;
3158         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3159                 p = xdr_inline_decode(xdr, 4);
3160                 if (unlikely(!p))
3161                         goto out_overflow;
3162                 *res = be32_to_cpup(p);
3163                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3164         }
3165         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3166         return 0;
3167 out_overflow:
3168         print_overflow_msg(__func__, xdr);
3169         return -EIO;
3170 }
3171
3172 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3173 {
3174         __be32 *p;
3175
3176         *res = 0;
3177         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3178                 return -EIO;
3179         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3180                 p = xdr_inline_decode(xdr, 4);
3181                 if (unlikely(!p))
3182                         goto out_overflow;
3183                 *res = be32_to_cpup(p);
3184                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3185         }
3186         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3187         return 0;
3188 out_overflow:
3189         print_overflow_msg(__func__, xdr);
3190         return -EIO;
3191 }
3192
3193 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3194 {
3195         __be32 *p;
3196         int ret = 0;
3197
3198         fsid->major = 0;
3199         fsid->minor = 0;
3200         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3201                 return -EIO;
3202         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3203                 p = xdr_inline_decode(xdr, 16);
3204                 if (unlikely(!p))
3205                         goto out_overflow;
3206                 p = xdr_decode_hyper(p, &fsid->major);
3207                 xdr_decode_hyper(p, &fsid->minor);
3208                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3209                 ret = NFS_ATTR_FATTR_FSID;
3210         }
3211         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3212                         (unsigned long long)fsid->major,
3213                         (unsigned long long)fsid->minor);
3214         return ret;
3215 out_overflow:
3216         print_overflow_msg(__func__, xdr);
3217         return -EIO;
3218 }
3219
3220 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3221 {
3222         __be32 *p;
3223
3224         *res = 60;
3225         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3226                 return -EIO;
3227         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3228                 p = xdr_inline_decode(xdr, 4);
3229                 if (unlikely(!p))
3230                         goto out_overflow;
3231                 *res = be32_to_cpup(p);
3232                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3233         }
3234         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3235         return 0;
3236 out_overflow:
3237         print_overflow_msg(__func__, xdr);
3238         return -EIO;
3239 }
3240
3241 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3242 {
3243         __be32 *p;
3244
3245         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3246                 return -EIO;
3247         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3248                 p = xdr_inline_decode(xdr, 4);
3249                 if (unlikely(!p))
3250                         goto out_overflow;
3251                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3252                 *res = -be32_to_cpup(p);
3253         }
3254         return 0;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3261 {
3262         __be32 *p;
3263         int len;
3264
3265         if (fh != NULL)
3266                 memset(fh, 0, sizeof(*fh));
3267
3268         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3269                 return -EIO;
3270         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3271                 p = xdr_inline_decode(xdr, 4);
3272                 if (unlikely(!p))
3273                         goto out_overflow;
3274                 len = be32_to_cpup(p);
3275                 if (len > NFS4_FHSIZE)
3276                         return -EIO;
3277                 p = xdr_inline_decode(xdr, len);
3278                 if (unlikely(!p))
3279                         goto out_overflow;
3280                 if (fh != NULL) {
3281                         memcpy(fh->data, p, len);
3282                         fh->size = len;
3283                 }
3284                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3285         }
3286         return 0;
3287 out_overflow:
3288         print_overflow_msg(__func__, xdr);
3289         return -EIO;
3290 }
3291
3292 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3293 {
3294         __be32 *p;
3295
3296         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3297         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3298                 return -EIO;
3299         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3300                 p = xdr_inline_decode(xdr, 4);
3301                 if (unlikely(!p))
3302                         goto out_overflow;
3303                 *res = be32_to_cpup(p);
3304                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3305         }
3306         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3307         return 0;
3308 out_overflow:
3309         print_overflow_msg(__func__, xdr);
3310         return -EIO;
3311 }
3312
3313 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3314 {
3315         __be32 *p;
3316         int ret = 0;
3317
3318         *fileid = 0;
3319         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3320                 return -EIO;
3321         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3322                 p = xdr_inline_decode(xdr, 8);
3323                 if (unlikely(!p))
3324                         goto out_overflow;
3325                 xdr_decode_hyper(p, fileid);
3326                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3327                 ret = NFS_ATTR_FATTR_FILEID;
3328         }
3329         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3330         return ret;
3331 out_overflow:
3332         print_overflow_msg(__func__, xdr);
3333         return -EIO;
3334 }
3335
3336 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3337 {
3338         __be32 *p;
3339         int ret = 0;
3340
3341         *fileid = 0;
3342         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3343                 return -EIO;
3344         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3345                 p = xdr_inline_decode(xdr, 8);
3346                 if (unlikely(!p))
3347                         goto out_overflow;
3348                 xdr_decode_hyper(p, fileid);
3349                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3350                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3351         }
3352         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3353         return ret;
3354 out_overflow:
3355         print_overflow_msg(__func__, xdr);
3356         return -EIO;
3357 }
3358
3359 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3360 {
3361         __be32 *p;
3362         int status = 0;
3363
3364         *res = 0;
3365         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3366                 return -EIO;
3367         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3368                 p = xdr_inline_decode(xdr, 8);
3369                 if (unlikely(!p))
3370                         goto out_overflow;
3371                 xdr_decode_hyper(p, res);
3372                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3373         }
3374         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3375         return status;
3376 out_overflow:
3377         print_overflow_msg(__func__, xdr);
3378         return -EIO;
3379 }
3380
3381 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3382 {
3383         __be32 *p;
3384         int status = 0;
3385
3386         *res = 0;
3387         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3388                 return -EIO;
3389         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3390                 p = xdr_inline_decode(xdr, 8);
3391                 if (unlikely(!p))
3392                         goto out_overflow;
3393                 xdr_decode_hyper(p, res);
3394                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3395         }
3396         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3397         return status;
3398 out_overflow:
3399         print_overflow_msg(__func__, xdr);
3400         return -EIO;
3401 }
3402
3403 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3404 {
3405         __be32 *p;
3406         int status = 0;
3407
3408         *res = 0;
3409         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3410                 return -EIO;
3411         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3412                 p = xdr_inline_decode(xdr, 8);
3413                 if (unlikely(!p))
3414                         goto out_overflow;
3415                 xdr_decode_hyper(p, res);
3416                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3417         }
3418         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3419         return status;
3420 out_overflow:
3421         print_overflow_msg(__func__, xdr);
3422         return -EIO;
3423 }
3424
3425 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3426 {
3427         u32 n;
3428         __be32 *p;
3429         int status = 0;
3430
3431         p = xdr_inline_decode(xdr, 4);
3432         if (unlikely(!p))
3433                 goto out_overflow;
3434         n = be32_to_cpup(p);
3435         if (n == 0)
3436                 goto root_path;
3437         dprintk("pathname4: ");
3438         path->ncomponents = 0;
3439         while (path->ncomponents < n) {
3440                 struct nfs4_string *component = &path->components[path->ncomponents];
3441                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3442                 if (unlikely(status != 0))
3443                         goto out_eio;
3444                 ifdebug (XDR)
3445                         pr_cont("%s%.*s ",
3446                                 (path->ncomponents != n ? "/ " : ""),
3447                                 component->len, component->data);
3448                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3449                         path->ncomponents++;
3450                 else {
3451                         dprintk("cannot parse %d components in path\n", n);
3452                         goto out_eio;
3453                 }
3454         }
3455 out:
3456         return status;
3457 root_path:
3458 /* a root pathname is sent as a zero component4 */
3459         path->ncomponents = 1;
3460         path->components[0].len=0;
3461         path->components[0].data=NULL;
3462         dprintk("pathname4: /\n");
3463         goto out;
3464 out_eio:
3465         dprintk(" status %d", status);
3466         status = -EIO;
3467         goto out;
3468 out_overflow:
3469         print_overflow_msg(__func__, xdr);
3470         return -EIO;
3471 }
3472
3473 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3474 {
3475         int n;
3476         __be32 *p;
3477         int status = -EIO;
3478
3479         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3480                 goto out;
3481         status = 0;
3482         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3483                 goto out;
3484         status = -EIO;
3485         /* Ignore borken servers that return unrequested attrs */
3486         if (unlikely(res == NULL))
3487                 goto out;
3488         dprintk("%s: fsroot:\n", __func__);
3489         status = decode_pathname(xdr, &res->fs_path);
3490         if (unlikely(status != 0))
3491                 goto out;
3492         p = xdr_inline_decode(xdr, 4);
3493         if (unlikely(!p))
3494                 goto out_overflow;
3495         n = be32_to_cpup(p);
3496         if (n <= 0)
3497                 goto out_eio;
3498         res->nlocations = 0;
3499         while (res->nlocations < n) {
3500                 u32 m;
3501                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3502
3503                 p = xdr_inline_decode(xdr, 4);
3504                 if (unlikely(!p))
3505                         goto out_overflow;
3506                 m = be32_to_cpup(p);
3507
3508                 loc->nservers = 0;
3509                 dprintk("%s: servers:\n", __func__);
3510                 while (loc->nservers < m) {
3511                         struct nfs4_string *server = &loc->servers[loc->nservers];
3512                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3513                         if (unlikely(status != 0))
3514                                 goto out_eio;
3515                         dprintk("%s ", server->data);
3516                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3517                                 loc->nservers++;
3518                         else {
3519                                 unsigned int i;
3520                                 dprintk("%s: using first %u of %u servers "
3521                                         "returned for location %u\n",
3522                                                 __func__,
3523                                                 NFS4_FS_LOCATION_MAXSERVERS,
3524                                                 m, res->nlocations);
3525                                 for (i = loc->nservers; i < m; i++) {
3526                                         unsigned int len;
3527                                         char *data;
3528                                         status = decode_opaque_inline(xdr, &len, &data);
3529                                         if (unlikely(status != 0))
3530                                                 goto out_eio;
3531                                 }
3532                         }
3533                 }
3534                 status = decode_pathname(xdr, &loc->rootpath);
3535                 if (unlikely(status != 0))
3536                         goto out_eio;
3537                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3538                         res->nlocations++;
3539         }
3540         if (res->nlocations != 0)
3541                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3542 out:
3543         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3544         return status;
3545 out_overflow:
3546         print_overflow_msg(__func__, xdr);
3547 out_eio:
3548         status = -EIO;
3549         goto out;
3550 }
3551
3552 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3553 {
3554         __be32 *p;
3555         int status = 0;
3556
3557         *res = 0;
3558         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3559                 return -EIO;
3560         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3561                 p = xdr_inline_decode(xdr, 8);
3562                 if (unlikely(!p))
3563                         goto out_overflow;
3564                 xdr_decode_hyper(p, res);
3565                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3566         }
3567         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3568         return status;
3569 out_overflow:
3570         print_overflow_msg(__func__, xdr);
3571         return -EIO;
3572 }
3573
3574 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3575 {
3576         __be32 *p;
3577         int status = 0;
3578
3579         *maxlink = 1;
3580         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3581                 return -EIO;
3582         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3583                 p = xdr_inline_decode(xdr, 4);
3584                 if (unlikely(!p))
3585                         goto out_overflow;
3586                 *maxlink = be32_to_cpup(p);
3587                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3588         }
3589         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3590         return status;
3591 out_overflow:
3592         print_overflow_msg(__func__, xdr);
3593         return -EIO;
3594 }
3595
3596 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3597 {
3598         __be32 *p;
3599         int status = 0;
3600
3601         *maxname = 1024;
3602         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3603                 return -EIO;
3604         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3605                 p = xdr_inline_decode(xdr, 4);
3606                 if (unlikely(!p))
3607                         goto out_overflow;
3608                 *maxname = be32_to_cpup(p);
3609                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3610         }
3611         dprintk("%s: maxname=%u\n", __func__, *maxname);
3612         return status;
3613 out_overflow:
3614         print_overflow_msg(__func__, xdr);
3615         return -EIO;
3616 }
3617
3618 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3619 {
3620         __be32 *p;
3621         int status = 0;
3622
3623         *res = 1024;
3624         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3625                 return -EIO;
3626         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3627                 uint64_t maxread;
3628                 p = xdr_inline_decode(xdr, 8);
3629                 if (unlikely(!p))
3630                         goto out_overflow;
3631                 xdr_decode_hyper(p, &maxread);
3632                 if (maxread > 0x7FFFFFFF)
3633                         maxread = 0x7FFFFFFF;
3634                 *res = (uint32_t)maxread;
3635                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3636         }
3637         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3638         return status;
3639 out_overflow:
3640         print_overflow_msg(__func__, xdr);
3641         return -EIO;
3642 }
3643
3644 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3645 {
3646         __be32 *p;
3647         int status = 0;
3648
3649         *res = 1024;
3650         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3651                 return -EIO;
3652         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3653                 uint64_t maxwrite;
3654                 p = xdr_inline_decode(xdr, 8);
3655                 if (unlikely(!p))
3656                         goto out_overflow;
3657                 xdr_decode_hyper(p, &maxwrite);
3658                 if (maxwrite > 0x7FFFFFFF)
3659                         maxwrite = 0x7FFFFFFF;
3660                 *res = (uint32_t)maxwrite;
3661                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3662         }
3663         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3664         return status;
3665 out_overflow:
3666         print_overflow_msg(__func__, xdr);
3667         return -EIO;
3668 }
3669
3670 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3671 {
3672         uint32_t tmp;
3673         __be32 *p;
3674         int ret = 0;
3675
3676         *mode = 0;
3677         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3678                 return -EIO;
3679         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3680                 p = xdr_inline_decode(xdr, 4);
3681                 if (unlikely(!p))
3682                         goto out_overflow;
3683                 tmp = be32_to_cpup(p);
3684                 *mode = tmp & ~S_IFMT;
3685                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3686                 ret = NFS_ATTR_FATTR_MODE;
3687         }
3688         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3689         return ret;
3690 out_overflow:
3691         print_overflow_msg(__func__, xdr);
3692         return -EIO;
3693 }
3694
3695 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3696 {
3697         __be32 *p;
3698         int ret = 0;
3699
3700         *nlink = 1;
3701         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3702                 return -EIO;
3703         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3704                 p = xdr_inline_decode(xdr, 4);
3705                 if (unlikely(!p))
3706                         goto out_overflow;
3707                 *nlink = be32_to_cpup(p);
3708                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3709                 ret = NFS_ATTR_FATTR_NLINK;
3710         }
3711         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3712         return ret;
3713 out_overflow:
3714         print_overflow_msg(__func__, xdr);
3715         return -EIO;
3716 }
3717
3718 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3719                 const struct nfs_server *server, uint32_t *uid,
3720                 struct nfs4_string *owner_name)
3721 {
3722         uint32_t len;
3723         __be32 *p;
3724         int ret = 0;
3725
3726         *uid = -2;
3727         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3728                 return -EIO;
3729         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3730                 p = xdr_inline_decode(xdr, 4);
3731                 if (unlikely(!p))
3732                         goto out_overflow;
3733                 len = be32_to_cpup(p);
3734                 p = xdr_inline_decode(xdr, len);
3735                 if (unlikely(!p))
3736                         goto out_overflow;
3737                 if (owner_name != NULL) {
3738                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3739                         if (owner_name->data != NULL) {
3740                                 owner_name->len = len;
3741                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3742                         }
3743                 } else if (len < XDR_MAX_NETOBJ) {
3744                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3745                                 ret = NFS_ATTR_FATTR_OWNER;
3746                         else
3747                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3748                                                 __func__);
3749                 } else
3750                         dprintk("%s: name too long (%u)!\n",
3751                                         __func__, len);
3752                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3753         }
3754         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3755         return ret;
3756 out_overflow:
3757         print_overflow_msg(__func__, xdr);
3758         return -EIO;
3759 }
3760
3761 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3762                 const struct nfs_server *server, uint32_t *gid,
3763                 struct nfs4_string *group_name)
3764 {
3765         uint32_t len;
3766         __be32 *p;
3767         int ret = 0;
3768
3769         *gid = -2;
3770         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3771                 return -EIO;
3772         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3773                 p = xdr_inline_decode(xdr, 4);
3774                 if (unlikely(!p))
3775                         goto out_overflow;
3776                 len = be32_to_cpup(p);
3777                 p = xdr_inline_decode(xdr, len);
3778                 if (unlikely(!p))
3779                         goto out_overflow;
3780                 if (group_name != NULL) {
3781                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3782                         if (group_name->data != NULL) {
3783                                 group_name->len = len;
3784                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3785                         }
3786                 } else if (len < XDR_MAX_NETOBJ) {
3787                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3788                                 ret = NFS_ATTR_FATTR_GROUP;
3789                         else
3790                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3791                                                 __func__);
3792                 } else
3793                         dprintk("%s: name too long (%u)!\n",
3794                                         __func__, len);
3795                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3796         }
3797         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3798         return ret;
3799 out_overflow:
3800         print_overflow_msg(__func__, xdr);
3801         return -EIO;
3802 }
3803
3804 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3805 {
3806         uint32_t major = 0, minor = 0;
3807         __be32 *p;
3808         int ret = 0;
3809
3810         *rdev = MKDEV(0,0);
3811         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3812                 return -EIO;
3813         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3814                 dev_t tmp;
3815
3816                 p = xdr_inline_decode(xdr, 8);
3817                 if (unlikely(!p))
3818                         goto out_overflow;
3819                 major = be32_to_cpup(p++);
3820                 minor = be32_to_cpup(p);
3821                 tmp = MKDEV(major, minor);
3822                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3823                         *rdev = tmp;
3824                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3825                 ret = NFS_ATTR_FATTR_RDEV;
3826         }
3827         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3828         return ret;
3829 out_overflow:
3830         print_overflow_msg(__func__, xdr);
3831         return -EIO;
3832 }
3833
3834 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3835 {
3836         __be32 *p;
3837         int status = 0;
3838
3839         *res = 0;
3840         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3841                 return -EIO;
3842         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3843                 p = xdr_inline_decode(xdr, 8);
3844                 if (unlikely(!p))
3845                         goto out_overflow;
3846                 xdr_decode_hyper(p, res);
3847                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3848         }
3849         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3850         return status;
3851 out_overflow:
3852         print_overflow_msg(__func__, xdr);
3853         return -EIO;
3854 }
3855
3856 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3857 {
3858         __be32 *p;
3859         int status = 0;
3860
3861         *res = 0;
3862         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3863                 return -EIO;
3864         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3865                 p = xdr_inline_decode(xdr, 8);
3866                 if (unlikely(!p))
3867                         goto out_overflow;
3868                 xdr_decode_hyper(p, res);
3869                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3870         }
3871         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3872         return status;
3873 out_overflow:
3874         print_overflow_msg(__func__, xdr);
3875         return -EIO;
3876 }
3877
3878 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3879 {
3880         __be32 *p;
3881         int status = 0;
3882
3883         *res = 0;
3884         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3885                 return -EIO;
3886         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3887                 p = xdr_inline_decode(xdr, 8);
3888                 if (unlikely(!p))
3889                         goto out_overflow;
3890                 xdr_decode_hyper(p, res);
3891                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3892         }
3893         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3894         return status;
3895 out_overflow:
3896         print_overflow_msg(__func__, xdr);
3897         return -EIO;
3898 }
3899
3900 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3901 {
3902         __be32 *p;
3903         int ret = 0;
3904
3905         *used = 0;
3906         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3907                 return -EIO;
3908         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3909                 p = xdr_inline_decode(xdr, 8);
3910                 if (unlikely(!p))
3911                         goto out_overflow;
3912                 xdr_decode_hyper(p, used);
3913                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3914                 ret = NFS_ATTR_FATTR_SPACE_USED;
3915         }
3916         dprintk("%s: space used=%Lu\n", __func__,
3917                         (unsigned long long)*used);
3918         return ret;
3919 out_overflow:
3920         print_overflow_msg(__func__, xdr);
3921         return -EIO;
3922 }
3923
3924 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3925 {
3926         __be32 *p;
3927         uint64_t sec;
3928         uint32_t nsec;
3929
3930         p = xdr_inline_decode(xdr, 12);
3931         if (unlikely(!p))
3932                 goto out_overflow;
3933         p = xdr_decode_hyper(p, &sec);
3934         nsec = be32_to_cpup(p);
3935         time->tv_sec = (time_t)sec;
3936         time->tv_nsec = (long)nsec;
3937         return 0;
3938 out_overflow:
3939         print_overflow_msg(__func__, xdr);
3940         return -EIO;
3941 }
3942
3943 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3944 {
3945         int status = 0;
3946
3947         time->tv_sec = 0;
3948         time->tv_nsec = 0;
3949         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3950                 return -EIO;
3951         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3952                 status = decode_attr_time(xdr, time);
3953                 if (status == 0)
3954                         status = NFS_ATTR_FATTR_ATIME;
3955                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3956         }
3957         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3958         return status;
3959 }
3960
3961 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3962 {
3963         int status = 0;
3964
3965         time->tv_sec = 0;
3966         time->tv_nsec = 0;
3967         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3968                 return -EIO;
3969         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3970                 status = decode_attr_time(xdr, time);
3971                 if (status == 0)
3972                         status = NFS_ATTR_FATTR_CTIME;
3973                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3974         }
3975         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3976         return status;
3977 }
3978
3979 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3980                                   struct timespec *time)
3981 {
3982         int status = 0;
3983
3984         time->tv_sec = 0;
3985         time->tv_nsec = 0;
3986         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3987                 return -EIO;
3988         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3989                 status = decode_attr_time(xdr, time);
3990                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3991         }
3992         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3993                 (long)time->tv_nsec);
3994         return status;
3995 }
3996
3997 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3998 {
3999         int status = 0;
4000
4001         time->tv_sec = 0;
4002         time->tv_nsec = 0;
4003         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4004                 return -EIO;
4005         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4006                 status = decode_attr_time(xdr, time);
4007                 if (status == 0)
4008                         status = NFS_ATTR_FATTR_MTIME;
4009                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4010         }
4011         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4012         return status;
4013 }
4014
4015 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4016 {
4017         unsigned int attrwords = XDR_QUADLEN(attrlen);
4018         unsigned int nwords = xdr->p - savep;
4019
4020         if (unlikely(attrwords != nwords)) {
4021                 dprintk("%s: server returned incorrect attribute length: "
4022                         "%u %c %u\n",
4023                                 __func__,
4024                                 attrwords << 2,
4025                                 (attrwords < nwords) ? '<' : '>',
4026                                 nwords << 2);
4027                 return -EIO;
4028         }
4029         return 0;
4030 }
4031
4032 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4033 {
4034         __be32 *p;
4035
4036         p = xdr_inline_decode(xdr, 20);
4037         if (unlikely(!p))
4038                 goto out_overflow;
4039         cinfo->atomic = be32_to_cpup(p++);
4040         p = xdr_decode_hyper(p, &cinfo->before);
4041         xdr_decode_hyper(p, &cinfo->after);
4042         return 0;
4043 out_overflow:
4044         print_overflow_msg(__func__, xdr);
4045         return -EIO;
4046 }
4047
4048 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4049 {
4050         __be32 *p;
4051         uint32_t supp, acc;
4052         int status;
4053
4054         status = decode_op_hdr(xdr, OP_ACCESS);
4055         if (status)
4056                 return status;
4057         p = xdr_inline_decode(xdr, 8);
4058         if (unlikely(!p))
4059                 goto out_overflow;
4060         supp = be32_to_cpup(p++);
4061         acc = be32_to_cpup(p);
4062         access->supported = supp;
4063         access->access = acc;
4064         return 0;
4065 out_overflow:
4066         print_overflow_msg(__func__, xdr);
4067         return -EIO;
4068 }
4069
4070 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4071 {
4072         __be32 *p;
4073
4074         p = xdr_inline_decode(xdr, len);
4075         if (likely(p)) {
4076                 memcpy(buf, p, len);
4077                 return 0;
4078         }
4079         print_overflow_msg(__func__, xdr);
4080         return -EIO;
4081 }
4082
4083 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4084 {
4085         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4086 }
4087
4088 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4089 {
4090         int status;
4091
4092         status = decode_op_hdr(xdr, OP_CLOSE);
4093         if (status != -EIO)
4094                 nfs_increment_open_seqid(status, res->seqid);
4095         if (!status)
4096                 status = decode_stateid(xdr, &res->stateid);
4097         return status;
4098 }
4099
4100 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4101 {
4102         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4103 }
4104
4105 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4106 {
4107         int status;
4108
4109         status = decode_op_hdr(xdr, OP_COMMIT);
4110         if (!status)
4111                 status = decode_verifier(xdr, res->verf->verifier);
4112         return status;
4113 }
4114
4115 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4116 {
4117         __be32 *p;
4118         uint32_t bmlen;
4119         int status;
4120
4121         status = decode_op_hdr(xdr, OP_CREATE);
4122         if (status)
4123                 return status;
4124         if ((status = decode_change_info(xdr, cinfo)))
4125                 return status;
4126         p = xdr_inline_decode(xdr, 4);
4127         if (unlikely(!p))
4128                 goto out_overflow;
4129         bmlen = be32_to_cpup(p);
4130         p = xdr_inline_decode(xdr, bmlen << 2);
4131         if (likely(p))
4132                 return 0;
4133 out_overflow:
4134         print_overflow_msg(__func__, xdr);
4135         return -EIO;
4136 }
4137
4138 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4139 {
4140         __be32 *savep;
4141         uint32_t attrlen, bitmap[3] = {0};
4142         int status;
4143
4144         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4145                 goto xdr_error;
4146         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4147                 goto xdr_error;
4148         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4149                 goto xdr_error;
4150         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4151                 goto xdr_error;
4152         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4153                                                  &res->fh_expire_type)) != 0)
4154                 goto xdr_error;
4155         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4156                 goto xdr_error;
4157         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4158                 goto xdr_error;
4159         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4160                 goto xdr_error;
4161         status = verify_attr_len(xdr, savep, attrlen);
4162 xdr_error:
4163         dprintk("%s: xdr returned %d!\n", __func__, -status);
4164         return status;
4165 }
4166
4167 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4168 {
4169         __be32 *savep;
4170         uint32_t attrlen, bitmap[3] = {0};
4171         int status;
4172
4173         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4174                 goto xdr_error;
4175         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4176                 goto xdr_error;
4177         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4178                 goto xdr_error;
4179
4180         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4181                 goto xdr_error;
4182         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4183                 goto xdr_error;
4184         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4185                 goto xdr_error;
4186         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4187                 goto xdr_error;
4188         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4189                 goto xdr_error;
4190         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4191                 goto xdr_error;
4192
4193         status = verify_attr_len(xdr, savep, attrlen);
4194 xdr_error:
4195         dprintk("%s: xdr returned %d!\n", __func__, -status);
4196         return status;
4197 }
4198
4199 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4200 {
4201         __be32 *savep;
4202         uint32_t attrlen, bitmap[3] = {0};
4203         int status;
4204
4205         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4206                 goto xdr_error;
4207         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4208                 goto xdr_error;
4209         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4210                 goto xdr_error;
4211
4212         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4215                 goto xdr_error;
4216
4217         status = verify_attr_len(xdr, savep, attrlen);
4218 xdr_error:
4219         dprintk("%s: xdr returned %d!\n", __func__, -status);
4220         return status;
4221 }
4222
4223 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4224                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4225                 struct nfs4_fs_locations *fs_loc,
4226                 const struct nfs_server *server)
4227 {
4228         int status;
4229         umode_t fmode = 0;
4230         uint32_t type;
4231         int32_t err;
4232
4233         status = decode_attr_type(xdr, bitmap, &type);
4234         if (status < 0)
4235                 goto xdr_error;
4236         fattr->mode = 0;
4237         if (status != 0) {
4238                 fattr->mode |= nfs_type2fmt[type];
4239                 fattr->valid |= status;
4240         }
4241
4242         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4243         if (status < 0)
4244                 goto xdr_error;
4245         fattr->valid |= status;
4246
4247         status = decode_attr_size(xdr, bitmap, &fattr->size);
4248         if (status < 0)
4249                 goto xdr_error;
4250         fattr->valid |= status;
4251
4252         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4253         if (status < 0)
4254                 goto xdr_error;
4255         fattr->valid |= status;
4256
4257         err = 0;
4258         status = decode_attr_error(xdr, bitmap, &err);
4259         if (status < 0)
4260                 goto xdr_error;
4261         if (err == -NFS4ERR_WRONGSEC)
4262                 nfs_fixup_secinfo_attributes(fattr, fh);
4263
4264         status = decode_attr_filehandle(xdr, bitmap, fh);
4265         if (status < 0)
4266                 goto xdr_error;
4267
4268         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4269         if (status < 0)
4270                 goto xdr_error;
4271         fattr->valid |= status;
4272
4273         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4274         if (status < 0)
4275                 goto xdr_error;
4276         fattr->valid |= status;
4277
4278         status = decode_attr_mode(xdr, bitmap, &fmode);
4279         if (status < 0)
4280                 goto xdr_error;
4281         if (status != 0) {
4282                 fattr->mode |= fmode;
4283                 fattr->valid |= status;
4284         }
4285
4286         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4287         if (status < 0)
4288                 goto xdr_error;
4289         fattr->valid |= status;
4290
4291         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4292         if (status < 0)
4293                 goto xdr_error;
4294         fattr->valid |= status;
4295
4296         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4297         if (status < 0)
4298                 goto xdr_error;
4299         fattr->valid |= status;
4300
4301         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4302         if (status < 0)
4303                 goto xdr_error;
4304         fattr->valid |= status;
4305
4306         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4307         if (status < 0)
4308                 goto xdr_error;
4309         fattr->valid |= status;
4310
4311         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4312         if (status < 0)
4313                 goto xdr_error;
4314         fattr->valid |= status;
4315
4316         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4317         if (status < 0)
4318                 goto xdr_error;
4319         fattr->valid |= status;
4320
4321         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4322         if (status < 0)
4323                 goto xdr_error;
4324         fattr->valid |= status;
4325
4326         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4327         if (status < 0)
4328                 goto xdr_error;
4329         fattr->valid |= status;
4330
4331 xdr_error:
4332         dprintk("%s: xdr returned %d\n", __func__, -status);
4333         return status;
4334 }
4335
4336 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4337                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4338                 const struct nfs_server *server)
4339 {
4340         __be32 *savep;
4341         uint32_t attrlen,
4342                  bitmap[3] = {0};
4343         int status;
4344
4345         status = decode_op_hdr(xdr, OP_GETATTR);
4346         if (status < 0)
4347                 goto xdr_error;
4348
4349         status = decode_attr_bitmap(xdr, bitmap);
4350         if (status < 0)
4351                 goto xdr_error;
4352
4353         status = decode_attr_length(xdr, &attrlen, &savep);
4354         if (status < 0)
4355                 goto xdr_error;
4356
4357         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4358         if (status < 0)
4359                 goto xdr_error;
4360
4361         status = verify_attr_len(xdr, savep, attrlen);
4362 xdr_error:
4363         dprintk("%s: xdr returned %d\n", __func__, -status);
4364         return status;
4365 }
4366
4367 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4368                 const struct nfs_server *server)
4369 {
4370         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4371 }
4372
4373 /*
4374  * Decode potentially multiple layout types. Currently we only support
4375  * one layout driver per file system.
4376  */
4377 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4378                                          uint32_t *layouttype)
4379 {
4380         uint32_t *p;
4381         int num;
4382
4383         p = xdr_inline_decode(xdr, 4);
4384         if (unlikely(!p))
4385                 goto out_overflow;
4386         num = be32_to_cpup(p);
4387
4388         /* pNFS is not supported by the underlying file system */
4389         if (num == 0) {
4390                 *layouttype = 0;
4391                 return 0;
4392         }
4393         if (num > 1)
4394                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4395                         "drivers per filesystem not supported\n", __func__);
4396
4397         /* Decode and set first layout type, move xdr->p past unused types */
4398         p = xdr_inline_decode(xdr, num * 4);
4399         if (unlikely(!p))
4400                 goto out_overflow;
4401         *layouttype = be32_to_cpup(p);
4402         return 0;
4403 out_overflow:
4404         print_overflow_msg(__func__, xdr);
4405         return -EIO;
4406 }
4407
4408 /*
4409  * The type of file system exported.
4410  * Note we must ensure that layouttype is set in any non-error case.
4411  */
4412 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4413                                 uint32_t *layouttype)
4414 {
4415         int status = 0;
4416
4417         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4418         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4419                 return -EIO;
4420         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4421                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4422                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4423         } else
4424                 *layouttype = 0;
4425         return status;
4426 }
4427
4428 /*
4429  * The prefered block size for layout directed io
4430  */
4431 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4432                                       uint32_t *res)
4433 {
4434         __be32 *p;
4435
4436         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4437         *res = 0;
4438         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4439                 p = xdr_inline_decode(xdr, 4);
4440                 if (unlikely(!p)) {
4441                         print_overflow_msg(__func__, xdr);
4442                         return -EIO;
4443                 }
4444                 *res = be32_to_cpup(p);
4445                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4446         }
4447         return 0;
4448 }
4449
4450 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4451 {
4452         __be32 *savep;
4453         uint32_t attrlen, bitmap[3];
4454         int status;
4455
4456         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4457                 goto xdr_error;
4458         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4459                 goto xdr_error;
4460         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4461                 goto xdr_error;
4462
4463         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4464
4465         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4466                 goto xdr_error;
4467         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4468                 goto xdr_error;
4469         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4470                 goto xdr_error;
4471         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4472         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4473                 goto xdr_error;
4474         fsinfo->wtpref = fsinfo->wtmax;
4475         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4476         if (status != 0)
4477                 goto xdr_error;
4478         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4479         if (status != 0)
4480                 goto xdr_error;
4481         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4482         if (status)
4483                 goto xdr_error;
4484
4485         status = verify_attr_len(xdr, savep, attrlen);
4486 xdr_error:
4487         dprintk("%s: xdr returned %d!\n", __func__, -status);
4488         return status;
4489 }
4490
4491 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4492 {
4493         __be32 *p;
4494         uint32_t len;
4495         int status;
4496
4497         /* Zero handle first to allow comparisons */
4498         memset(fh, 0, sizeof(*fh));
4499
4500         status = decode_op_hdr(xdr, OP_GETFH);
4501         if (status)
4502                 return status;
4503
4504         p = xdr_inline_decode(xdr, 4);
4505         if (unlikely(!p))
4506                 goto out_overflow;
4507         len = be32_to_cpup(p);
4508         if (len > NFS4_FHSIZE)
4509                 return -EIO;
4510         fh->size = len;
4511         p = xdr_inline_decode(xdr, len);
4512         if (unlikely(!p))
4513                 goto out_overflow;
4514         memcpy(fh->data, p, len);
4515         return 0;
4516 out_overflow:
4517         print_overflow_msg(__func__, xdr);
4518         return -EIO;
4519 }
4520
4521 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4522 {
4523         int status;
4524
4525         status = decode_op_hdr(xdr, OP_LINK);
4526         if (status)
4527                 return status;
4528         return decode_change_info(xdr, cinfo);
4529 }
4530
4531 /*
4532  * We create the owner, so we know a proper owner.id length is 4.
4533  */
4534 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4535 {
4536         uint64_t offset, length, clientid;
4537         __be32 *p;
4538         uint32_t namelen, type;
4539
4540         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4541         if (unlikely(!p))
4542                 goto out_overflow;
4543         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4544         p = xdr_decode_hyper(p, &length);
4545         type = be32_to_cpup(p++); /* 4 byte read */
4546         if (fl != NULL) { /* manipulate file lock */
4547                 fl->fl_start = (loff_t)offset;
4548                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4549                 if (length == ~(uint64_t)0)
4550                         fl->fl_end = OFFSET_MAX;
4551                 fl->fl_type = F_WRLCK;
4552                 if (type & 1)
4553                         fl->fl_type = F_RDLCK;
4554                 fl->fl_pid = 0;
4555         }
4556         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4557         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4558         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4559         if (likely(p))
4560                 return -NFS4ERR_DENIED;
4561 out_overflow:
4562         print_overflow_msg(__func__, xdr);
4563         return -EIO;
4564 }
4565
4566 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4567 {
4568         int status;
4569
4570         status = decode_op_hdr(xdr, OP_LOCK);
4571         if (status == -EIO)
4572                 goto out;
4573         if (status == 0) {
4574                 status = decode_stateid(xdr, &res->stateid);
4575                 if (unlikely(status))
4576                         goto out;
4577         } else if (status == -NFS4ERR_DENIED)
4578                 status = decode_lock_denied(xdr, NULL);
4579         if (res->open_seqid != NULL)
4580                 nfs_increment_open_seqid(status, res->open_seqid);
4581         nfs_increment_lock_seqid(status, res->lock_seqid);
4582 out:
4583         return status;
4584 }
4585
4586 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4587 {
4588         int status;
4589         status = decode_op_hdr(xdr, OP_LOCKT);
4590         if (status == -NFS4ERR_DENIED)
4591                 return decode_lock_denied(xdr, res->denied);
4592         return status;
4593 }
4594
4595 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4596 {
4597         int status;
4598
4599         status = decode_op_hdr(xdr, OP_LOCKU);
4600         if (status != -EIO)
4601                 nfs_increment_lock_seqid(status, res->seqid);
4602         if (status == 0)
4603                 status = decode_stateid(xdr, &res->stateid);
4604         return status;
4605 }
4606
4607 static int decode_release_lockowner(struct xdr_stream *xdr)
4608 {
4609         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4610 }
4611
4612 static int decode_lookup(struct xdr_stream *xdr)
4613 {
4614         return decode_op_hdr(xdr, OP_LOOKUP);
4615 }
4616
4617 /* This is too sick! */
4618 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4619 {
4620         __be32 *p;
4621         uint32_t limit_type, nblocks, blocksize;
4622
4623         p = xdr_inline_decode(xdr, 12);
4624         if (unlikely(!p))
4625                 goto out_overflow;
4626         limit_type = be32_to_cpup(p++);
4627         switch (limit_type) {
4628         case 1:
4629                 xdr_decode_hyper(p, maxsize);
4630                 break;
4631         case 2:
4632                 nblocks = be32_to_cpup(p++);
4633                 blocksize = be32_to_cpup(p);
4634                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4635         }
4636         return 0;
4637 out_overflow:
4638         print_overflow_msg(__func__, xdr);
4639         return -EIO;
4640 }
4641
4642 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4643 {
4644         __be32 *p;
4645         uint32_t delegation_type;
4646         int status;
4647
4648         p = xdr_inline_decode(xdr, 4);
4649         if (unlikely(!p))
4650                 goto out_overflow;
4651         delegation_type = be32_to_cpup(p);
4652         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4653                 res->delegation_type = 0;
4654                 return 0;
4655         }
4656         status = decode_stateid(xdr, &res->delegation);
4657         if (unlikely(status))
4658                 return status;
4659         p = xdr_inline_decode(xdr, 4);
4660         if (unlikely(!p))
4661                 goto out_overflow;
4662         res->do_recall = be32_to_cpup(p);
4663
4664         switch (delegation_type) {
4665         case NFS4_OPEN_DELEGATE_READ:
4666                 res->delegation_type = FMODE_READ;
4667                 break;
4668         case NFS4_OPEN_DELEGATE_WRITE:
4669                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4670                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4671                                 return -EIO;
4672         }
4673         return decode_ace(xdr, NULL, res->server->nfs_client);
4674 out_overflow:
4675         print_overflow_msg(__func__, xdr);
4676         return -EIO;
4677 }
4678
4679 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4680 {
4681         __be32 *p;
4682         uint32_t savewords, bmlen, i;
4683         int status;
4684
4685         status = decode_op_hdr(xdr, OP_OPEN);
4686         if (status != -EIO)
4687                 nfs_increment_open_seqid(status, res->seqid);
4688         if (!status)
4689                 status = decode_stateid(xdr, &res->stateid);
4690         if (unlikely(status))
4691                 return status;
4692
4693         decode_change_info(xdr, &res->cinfo);
4694
4695         p = xdr_inline_decode(xdr, 8);
4696         if (unlikely(!p))
4697                 goto out_overflow;
4698         res->rflags = be32_to_cpup(p++);
4699         bmlen = be32_to_cpup(p);
4700         if (bmlen > 10)
4701                 goto xdr_error;
4702
4703         p = xdr_inline_decode(xdr, bmlen << 2);
4704         if (unlikely(!p))
4705                 goto out_overflow;
4706         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4707         for (i = 0; i < savewords; ++i)
4708                 res->attrset[i] = be32_to_cpup(p++);
4709         for (; i < NFS4_BITMAP_SIZE; i++)
4710                 res->attrset[i] = 0;
4711
4712         return decode_delegation(xdr, res);
4713 xdr_error:
4714         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4715         return -EIO;
4716 out_overflow:
4717         print_overflow_msg(__func__, xdr);
4718         return -EIO;
4719 }
4720
4721 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4722 {
4723         int status;
4724
4725         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4726         if (status != -EIO)
4727                 nfs_increment_open_seqid(status, res->seqid);
4728         if (!status)
4729                 status = decode_stateid(xdr, &res->stateid);
4730         return status;
4731 }
4732
4733 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4734 {
4735         int status;
4736
4737         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4738         if (status != -EIO)
4739                 nfs_increment_open_seqid(status, res->seqid);
4740         if (!status)
4741                 status = decode_stateid(xdr, &res->stateid);
4742         return status;
4743 }
4744
4745 static int decode_putfh(struct xdr_stream *xdr)
4746 {
4747         return decode_op_hdr(xdr, OP_PUTFH);
4748 }
4749
4750 static int decode_putrootfh(struct xdr_stream *xdr)
4751 {
4752         return decode_op_hdr(xdr, OP_PUTROOTFH);
4753 }
4754
4755 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4756 {
4757         struct kvec *iov = req->rq_rcv_buf.head;
4758         __be32 *p;
4759         uint32_t count, eof, recvd, hdrlen;
4760         int status;
4761
4762         status = decode_op_hdr(xdr, OP_READ);
4763         if (status)
4764                 return status;
4765         p = xdr_inline_decode(xdr, 8);
4766         if (unlikely(!p))
4767                 goto out_overflow;
4768         eof = be32_to_cpup(p++);
4769         count = be32_to_cpup(p);
4770         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4771         recvd = req->rq_rcv_buf.len - hdrlen;
4772         if (count > recvd) {
4773                 dprintk("NFS: server cheating in read reply: "
4774                                 "count %u > recvd %u\n", count, recvd);
4775                 count = recvd;
4776                 eof = 0;
4777         }
4778         xdr_read_pages(xdr, count);
4779         res->eof = eof;
4780         res->count = count;
4781         return 0;
4782 out_overflow:
4783         print_overflow_msg(__func__, xdr);
4784         return -EIO;
4785 }
4786
4787 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4788 {
4789         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4790         struct kvec     *iov = rcvbuf->head;
4791         size_t          hdrlen;
4792         u32             recvd, pglen = rcvbuf->page_len;
4793         int             status;
4794         __be32          verf[2];
4795
4796         status = decode_op_hdr(xdr, OP_READDIR);
4797         if (!status)
4798                 status = decode_verifier(xdr, readdir->verifier.data);
4799         if (unlikely(status))
4800                 return status;
4801         memcpy(verf, readdir->verifier.data, sizeof(verf));
4802         dprintk("%s: verifier = %08x:%08x\n",
4803                         __func__, verf[0], verf[1]);
4804
4805         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4806         recvd = rcvbuf->len - hdrlen;
4807         if (pglen > recvd)
4808                 pglen = recvd;
4809         xdr_read_pages(xdr, pglen);
4810
4811
4812         return pglen;
4813 }
4814
4815 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4816 {
4817         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4818         struct kvec *iov = rcvbuf->head;
4819         size_t hdrlen;
4820         u32 len, recvd;
4821         __be32 *p;
4822         int status;
4823
4824         status = decode_op_hdr(xdr, OP_READLINK);
4825         if (status)
4826                 return status;
4827
4828         /* Convert length of symlink */
4829         p = xdr_inline_decode(xdr, 4);
4830         if (unlikely(!p))
4831                 goto out_overflow;
4832         len = be32_to_cpup(p);
4833         if (len >= rcvbuf->page_len || len <= 0) {
4834                 dprintk("nfs: server returned giant symlink!\n");
4835                 return -ENAMETOOLONG;
4836         }
4837         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4838         recvd = req->rq_rcv_buf.len - hdrlen;
4839         if (recvd < len) {
4840                 dprintk("NFS: server cheating in readlink reply: "
4841                                 "count %u > recvd %u\n", len, recvd);
4842                 return -EIO;
4843         }
4844         xdr_read_pages(xdr, len);
4845         /*
4846          * The XDR encode routine has set things up so that
4847          * the link text will be copied directly into the
4848          * buffer.  We just have to do overflow-checking,
4849          * and and null-terminate the text (the VFS expects
4850          * null-termination).
4851          */
4852         xdr_terminate_string(rcvbuf, len);
4853         return 0;
4854 out_overflow:
4855         print_overflow_msg(__func__, xdr);
4856         return -EIO;
4857 }
4858
4859 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4860 {
4861         int status;
4862
4863         status = decode_op_hdr(xdr, OP_REMOVE);
4864         if (status)
4865                 goto out;
4866         status = decode_change_info(xdr, cinfo);
4867 out:
4868         return status;
4869 }
4870
4871 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4872               struct nfs4_change_info *new_cinfo)
4873 {
4874         int status;
4875
4876         status = decode_op_hdr(xdr, OP_RENAME);
4877         if (status)
4878                 goto out;
4879         if ((status = decode_change_info(xdr, old_cinfo)))
4880                 goto out;
4881         status = decode_change_info(xdr, new_cinfo);
4882 out:
4883         return status;
4884 }
4885
4886 static int decode_renew(struct xdr_stream *xdr)
4887 {
4888         return decode_op_hdr(xdr, OP_RENEW);
4889 }
4890
4891 static int
4892 decode_restorefh(struct xdr_stream *xdr)
4893 {
4894         return decode_op_hdr(xdr, OP_RESTOREFH);
4895 }
4896
4897 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4898                          struct nfs_getaclres *res)
4899 {
4900         __be32 *savep, *bm_p;
4901         uint32_t attrlen,
4902                  bitmap[3] = {0};
4903         struct kvec *iov = req->rq_rcv_buf.head;
4904         int status;
4905
4906         res->acl_len = 0;
4907         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4908                 goto out;
4909         bm_p = xdr->p;
4910         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4911                 goto out;
4912         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4913                 goto out;
4914
4915         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4916                 return -EIO;
4917         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4918                 size_t hdrlen;
4919                 u32 recvd;
4920
4921                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4922                  * are stored with the acl data to handle the problem of
4923                  * variable length bitmaps.*/
4924                 xdr->p = bm_p;
4925                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4926                 res->acl_data_offset <<= 2;
4927
4928                 /* We ignore &savep and don't do consistency checks on
4929                  * the attr length.  Let userspace figure it out.... */
4930                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4931                 attrlen += res->acl_data_offset;
4932                 recvd = req->rq_rcv_buf.len - hdrlen;
4933                 if (attrlen > recvd) {
4934                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4935                                 /* getxattr interface called with a NULL buf */
4936                                 res->acl_len = attrlen;
4937                                 goto out;
4938                         }
4939                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
4940                                         attrlen, recvd);
4941                         return -EINVAL;
4942                 }
4943                 xdr_read_pages(xdr, attrlen);
4944                 res->acl_len = attrlen;
4945         } else
4946                 status = -EOPNOTSUPP;
4947
4948 out:
4949         return status;
4950 }
4951
4952 static int
4953 decode_savefh(struct xdr_stream *xdr)
4954 {
4955         return decode_op_hdr(xdr, OP_SAVEFH);
4956 }
4957
4958 static int decode_setattr(struct xdr_stream *xdr)
4959 {
4960         __be32 *p;
4961         uint32_t bmlen;
4962         int status;
4963
4964         status = decode_op_hdr(xdr, OP_SETATTR);
4965         if (status)
4966                 return status;
4967         p = xdr_inline_decode(xdr, 4);
4968         if (unlikely(!p))
4969                 goto out_overflow;
4970         bmlen = be32_to_cpup(p);
4971         p = xdr_inline_decode(xdr, bmlen << 2);
4972         if (likely(p))
4973                 return 0;
4974 out_overflow:
4975         print_overflow_msg(__func__, xdr);
4976         return -EIO;
4977 }
4978
4979 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4980 {
4981         __be32 *p;
4982         uint32_t opnum;
4983         int32_t nfserr;
4984
4985         p = xdr_inline_decode(xdr, 8);
4986         if (unlikely(!p))
4987                 goto out_overflow;
4988         opnum = be32_to_cpup(p++);
4989         if (opnum != OP_SETCLIENTID) {
4990                 dprintk("nfs: decode_setclientid: Server returned operation"
4991                         " %d\n", opnum);
4992                 return -EIO;
4993         }
4994         nfserr = be32_to_cpup(p);
4995         if (nfserr == NFS_OK) {
4996                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4997                 if (unlikely(!p))
4998                         goto out_overflow;
4999                 p = xdr_decode_hyper(p, &res->clientid);
5000                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5001         } else if (nfserr == NFSERR_CLID_INUSE) {
5002                 uint32_t len;
5003
5004                 /* skip netid string */
5005                 p = xdr_inline_decode(xdr, 4);
5006                 if (unlikely(!p))
5007                         goto out_overflow;
5008                 len = be32_to_cpup(p);
5009                 p = xdr_inline_decode(xdr, len);
5010                 if (unlikely(!p))
5011                         goto out_overflow;
5012
5013                 /* skip uaddr string */
5014                 p = xdr_inline_decode(xdr, 4);
5015                 if (unlikely(!p))
5016                         goto out_overflow;
5017                 len = be32_to_cpup(p);
5018                 p = xdr_inline_decode(xdr, len);
5019                 if (unlikely(!p))
5020                         goto out_overflow;
5021                 return -NFSERR_CLID_INUSE;
5022         } else
5023                 return nfs4_stat_to_errno(nfserr);
5024
5025         return 0;
5026 out_overflow:
5027         print_overflow_msg(__func__, xdr);
5028         return -EIO;
5029 }
5030
5031 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5032 {
5033         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5034 }
5035
5036 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5037 {
5038         __be32 *p;
5039         int status;
5040
5041         status = decode_op_hdr(xdr, OP_WRITE);
5042         if (status)
5043                 return status;
5044
5045         p = xdr_inline_decode(xdr, 16);
5046         if (unlikely(!p))
5047                 goto out_overflow;
5048         res->count = be32_to_cpup(p++);
5049         res->verf->committed = be32_to_cpup(p++);
5050         memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5051         return 0;
5052 out_overflow:
5053         print_overflow_msg(__func__, xdr);
5054         return -EIO;
5055 }
5056
5057 static int decode_delegreturn(struct xdr_stream *xdr)
5058 {
5059         return decode_op_hdr(xdr, OP_DELEGRETURN);
5060 }
5061
5062 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5063 {
5064         __be32 *p;
5065
5066         p = xdr_inline_decode(xdr, 4);
5067         if (unlikely(!p))
5068                 goto out_overflow;
5069         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5070         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5071                 goto out_err;
5072
5073         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5074         if (unlikely(!p))
5075                 goto out_overflow;
5076         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5077
5078         p = xdr_inline_decode(xdr, 8);
5079         if (unlikely(!p))
5080                 goto out_overflow;
5081         flavor->gss.qop4 = be32_to_cpup(p++);
5082         flavor->gss.service = be32_to_cpup(p);
5083
5084         return 0;
5085
5086 out_overflow:
5087         print_overflow_msg(__func__, xdr);
5088         return -EIO;
5089 out_err:
5090         return -EINVAL;
5091 }
5092
5093 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5094 {
5095         struct nfs4_secinfo_flavor *sec_flavor;
5096         int status;
5097         __be32 *p;
5098         int i, num_flavors;
5099
5100         status = decode_op_hdr(xdr, OP_SECINFO);
5101         if (status)
5102                 goto out;
5103         p = xdr_inline_decode(xdr, 4);
5104         if (unlikely(!p))
5105                 goto out_overflow;
5106
5107         res->flavors->num_flavors = 0;
5108         num_flavors = be32_to_cpup(p);
5109
5110         for (i = 0; i < num_flavors; i++) {
5111                 sec_flavor = &res->flavors->flavors[i];
5112                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5113                         break;
5114
5115                 p = xdr_inline_decode(xdr, 4);
5116                 if (unlikely(!p))
5117                         goto out_overflow;
5118                 sec_flavor->flavor = be32_to_cpup(p);
5119
5120                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5121                         status = decode_secinfo_gss(xdr, sec_flavor);
5122                         if (status)
5123                                 goto out;
5124                 }
5125                 res->flavors->num_flavors++;
5126         }
5127
5128 out:
5129         return status;
5130 out_overflow:
5131         print_overflow_msg(__func__, xdr);
5132         return -EIO;
5133 }
5134
5135 #if defined(CONFIG_NFS_V4_1)
5136 static int decode_exchange_id(struct xdr_stream *xdr,
5137                               struct nfs41_exchange_id_res *res)
5138 {
5139         __be32 *p;
5140         uint32_t dummy;
5141         char *dummy_str;
5142         int status;
5143         struct nfs_client *clp = res->client;
5144         uint32_t impl_id_count;
5145
5146         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5147         if (status)
5148                 return status;
5149
5150         p = xdr_inline_decode(xdr, 8);
5151         if (unlikely(!p))
5152                 goto out_overflow;
5153         xdr_decode_hyper(p, &clp->cl_clientid);
5154         p = xdr_inline_decode(xdr, 12);
5155         if (unlikely(!p))
5156                 goto out_overflow;
5157         clp->cl_seqid = be32_to_cpup(p++);
5158         clp->cl_exchange_flags = be32_to_cpup(p++);
5159
5160         /* We ask for SP4_NONE */
5161         dummy = be32_to_cpup(p);
5162         if (dummy != SP4_NONE)
5163                 return -EIO;
5164
5165         /* Throw away minor_id */
5166         p = xdr_inline_decode(xdr, 8);
5167         if (unlikely(!p))
5168                 goto out_overflow;
5169
5170         /* Throw away Major id */
5171         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5172         if (unlikely(status))
5173                 return status;
5174
5175         /* Save server_scope */
5176         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5177         if (unlikely(status))
5178                 return status;
5179
5180         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5181                 return -EIO;
5182
5183         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5184         res->server_scope->server_scope_sz = dummy;
5185
5186         /* Implementation Id */
5187         p = xdr_inline_decode(xdr, 4);
5188         if (unlikely(!p))
5189                 goto out_overflow;
5190         impl_id_count = be32_to_cpup(p++);
5191
5192         if (impl_id_count) {
5193                 /* nii_domain */
5194                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5195                 if (unlikely(status))
5196                         return status;
5197                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5198                         return -EIO;
5199                 memcpy(res->impl_id->domain, dummy_str, dummy);
5200
5201                 /* nii_name */
5202                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5203                 if (unlikely(status))
5204                         return status;
5205                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5206                         return -EIO;
5207                 memcpy(res->impl_id->name, dummy_str, dummy);
5208
5209                 /* nii_date */
5210                 p = xdr_inline_decode(xdr, 12);
5211                 if (unlikely(!p))
5212                         goto out_overflow;
5213                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5214                 res->impl_id->date.nseconds = be32_to_cpup(p);
5215
5216                 /* if there's more than one entry, ignore the rest */
5217         }
5218         return 0;
5219 out_overflow:
5220         print_overflow_msg(__func__, xdr);
5221         return -EIO;
5222 }
5223
5224 static int decode_chan_attrs(struct xdr_stream *xdr,
5225                              struct nfs4_channel_attrs *attrs)
5226 {
5227         __be32 *p;
5228         u32 nr_attrs, val;
5229
5230         p = xdr_inline_decode(xdr, 28);
5231         if (unlikely(!p))
5232                 goto out_overflow;
5233         val = be32_to_cpup(p++);        /* headerpadsz */
5234         if (val)
5235                 return -EINVAL;         /* no support for header padding yet */
5236         attrs->max_rqst_sz = be32_to_cpup(p++);
5237         attrs->max_resp_sz = be32_to_cpup(p++);
5238         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5239         attrs->max_ops = be32_to_cpup(p++);
5240         attrs->max_reqs = be32_to_cpup(p++);
5241         nr_attrs = be32_to_cpup(p);
5242         if (unlikely(nr_attrs > 1)) {
5243                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5244                         "count %u\n", __func__, nr_attrs);
5245                 return -EINVAL;
5246         }
5247         if (nr_attrs == 1) {
5248                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5249                 if (unlikely(!p))
5250                         goto out_overflow;
5251         }
5252         return 0;
5253 out_overflow:
5254         print_overflow_msg(__func__, xdr);
5255         return -EIO;
5256 }
5257
5258 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5259 {
5260         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5261 }
5262
5263 static int decode_create_session(struct xdr_stream *xdr,
5264                                  struct nfs41_create_session_res *res)
5265 {
5266         __be32 *p;
5267         int status;
5268         struct nfs_client *clp = res->client;
5269         struct nfs4_session *session = clp->cl_session;
5270
5271         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5272         if (!status)
5273                 status = decode_sessionid(xdr, &session->sess_id);
5274         if (unlikely(status))
5275                 return status;
5276
5277         /* seqid, flags */
5278         p = xdr_inline_decode(xdr, 8);
5279         if (unlikely(!p))
5280                 goto out_overflow;
5281         clp->cl_seqid = be32_to_cpup(p++);
5282         session->flags = be32_to_cpup(p);
5283
5284         /* Channel attributes */
5285         status = decode_chan_attrs(xdr, &session->fc_attrs);
5286         if (!status)
5287                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5288         return status;
5289 out_overflow:
5290         print_overflow_msg(__func__, xdr);
5291         return -EIO;
5292 }
5293
5294 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5295 {
5296         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5297 }
5298
5299 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5300 {
5301         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5302 }
5303 #endif /* CONFIG_NFS_V4_1 */
5304
5305 static int decode_sequence(struct xdr_stream *xdr,
5306                            struct nfs4_sequence_res *res,
5307                            struct rpc_rqst *rqstp)
5308 {
5309 #if defined(CONFIG_NFS_V4_1)
5310         struct nfs4_sessionid id;
5311         u32 dummy;
5312         int status;
5313         __be32 *p;
5314
5315         if (!res->sr_session)
5316                 return 0;
5317
5318         status = decode_op_hdr(xdr, OP_SEQUENCE);
5319         if (!status)
5320                 status = decode_sessionid(xdr, &id);
5321         if (unlikely(status))
5322                 goto out_err;
5323
5324         /*
5325          * If the server returns different values for sessionID, slotID or
5326          * sequence number, the server is looney tunes.
5327          */
5328         status = -EREMOTEIO;
5329
5330         if (memcmp(id.data, res->sr_session->sess_id.data,
5331                    NFS4_MAX_SESSIONID_LEN)) {
5332                 dprintk("%s Invalid session id\n", __func__);
5333                 goto out_err;
5334         }
5335
5336         p = xdr_inline_decode(xdr, 20);
5337         if (unlikely(!p))
5338                 goto out_overflow;
5339
5340         /* seqid */
5341         dummy = be32_to_cpup(p++);
5342         if (dummy != res->sr_slot->seq_nr) {
5343                 dprintk("%s Invalid sequence number\n", __func__);
5344                 goto out_err;
5345         }
5346         /* slot id */
5347         dummy = be32_to_cpup(p++);
5348         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5349                 dprintk("%s Invalid slot id\n", __func__);
5350                 goto out_err;
5351         }
5352         /* highest slot id - currently not processed */
5353         dummy = be32_to_cpup(p++);
5354         /* target highest slot id - currently not processed */
5355         dummy = be32_to_cpup(p++);
5356         /* result flags */
5357         res->sr_status_flags = be32_to_cpup(p);
5358         status = 0;
5359 out_err:
5360         res->sr_status = status;
5361         return status;
5362 out_overflow:
5363         print_overflow_msg(__func__, xdr);
5364         status = -EIO;
5365         goto out_err;
5366 #else  /* CONFIG_NFS_V4_1 */
5367         return 0;
5368 #endif /* CONFIG_NFS_V4_1 */
5369 }
5370
5371 #if defined(CONFIG_NFS_V4_1)
5372 /*
5373  * TODO: Need to handle case when EOF != true;
5374  */
5375 static int decode_getdevicelist(struct xdr_stream *xdr,
5376                                 struct pnfs_devicelist *res)
5377 {
5378         __be32 *p;
5379         int status, i;
5380         struct nfs_writeverf verftemp;
5381
5382         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5383         if (status)
5384                 return status;
5385
5386         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5387         if (unlikely(!p))
5388                 goto out_overflow;
5389
5390         /* TODO: Skip cookie for now */
5391         p += 2;
5392
5393         /* Read verifier */
5394         p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5395
5396         res->num_devs = be32_to_cpup(p);
5397
5398         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5399
5400         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5401                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5402                                 __func__, res->num_devs);
5403                 return -EIO;
5404         }
5405
5406         p = xdr_inline_decode(xdr,
5407                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5408         if (unlikely(!p))
5409                 goto out_overflow;
5410         for (i = 0; i < res->num_devs; i++)
5411                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5412                                             NFS4_DEVICEID4_SIZE);
5413         res->eof = be32_to_cpup(p);
5414         return 0;
5415 out_overflow:
5416         print_overflow_msg(__func__, xdr);
5417         return -EIO;
5418 }
5419
5420 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5421                                 struct pnfs_device *pdev)
5422 {
5423         __be32 *p;
5424         uint32_t len, type;
5425         int status;
5426
5427         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5428         if (status) {
5429                 if (status == -ETOOSMALL) {
5430                         p = xdr_inline_decode(xdr, 4);
5431                         if (unlikely(!p))
5432                                 goto out_overflow;
5433                         pdev->mincount = be32_to_cpup(p);
5434                         dprintk("%s: Min count too small. mincnt = %u\n",
5435                                 __func__, pdev->mincount);
5436                 }
5437                 return status;
5438         }
5439
5440         p = xdr_inline_decode(xdr, 8);
5441         if (unlikely(!p))
5442                 goto out_overflow;
5443         type = be32_to_cpup(p++);
5444         if (type != pdev->layout_type) {
5445                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5446                         __func__, pdev->layout_type, type);
5447                 return -EINVAL;
5448         }
5449         /*
5450          * Get the length of the opaque device_addr4. xdr_read_pages places
5451          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5452          * and places the remaining xdr data in xdr_buf->tail
5453          */
5454         pdev->mincount = be32_to_cpup(p);
5455         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5456
5457         /* Parse notification bitmap, verifying that it is zero. */
5458         p = xdr_inline_decode(xdr, 4);
5459         if (unlikely(!p))
5460                 goto out_overflow;
5461         len = be32_to_cpup(p);
5462         if (len) {
5463                 uint32_t i;
5464
5465                 p = xdr_inline_decode(xdr, 4 * len);
5466                 if (unlikely(!p))
5467                         goto out_overflow;
5468                 for (i = 0; i < len; i++, p++) {
5469                         if (be32_to_cpup(p)) {
5470                                 dprintk("%s: notifications not supported\n",
5471                                         __func__);
5472                                 return -EIO;
5473                         }
5474                 }
5475         }
5476         return 0;
5477 out_overflow:
5478         print_overflow_msg(__func__, xdr);
5479         return -EIO;
5480 }
5481
5482 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5483                             struct nfs4_layoutget_res *res)
5484 {
5485         __be32 *p;
5486         int status;
5487         u32 layout_count;
5488         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5489         struct kvec *iov = rcvbuf->head;
5490         u32 hdrlen, recvd;
5491
5492         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5493         if (status)
5494                 return status;
5495         p = xdr_inline_decode(xdr, 4);
5496         if (unlikely(!p))
5497                 goto out_overflow;
5498         res->return_on_close = be32_to_cpup(p);
5499         decode_stateid(xdr, &res->stateid);
5500         p = xdr_inline_decode(xdr, 4);
5501         if (unlikely(!p))
5502                 goto out_overflow;
5503         layout_count = be32_to_cpup(p);
5504         if (!layout_count) {
5505                 dprintk("%s: server responded with empty layout array\n",
5506                         __func__);
5507                 return -EINVAL;
5508         }
5509
5510         p = xdr_inline_decode(xdr, 28);
5511         if (unlikely(!p))
5512                 goto out_overflow;
5513         p = xdr_decode_hyper(p, &res->range.offset);
5514         p = xdr_decode_hyper(p, &res->range.length);
5515         res->range.iomode = be32_to_cpup(p++);
5516         res->type = be32_to_cpup(p++);
5517         res->layoutp->len = be32_to_cpup(p);
5518
5519         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5520                 __func__,
5521                 (unsigned long)res->range.offset,
5522                 (unsigned long)res->range.length,
5523                 res->range.iomode,
5524                 res->type,
5525                 res->layoutp->len);
5526
5527         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5528         recvd = req->rq_rcv_buf.len - hdrlen;
5529         if (res->layoutp->len > recvd) {
5530                 dprintk("NFS: server cheating in layoutget reply: "
5531                                 "layout len %u > recvd %u\n",
5532                                 res->layoutp->len, recvd);
5533                 return -EINVAL;
5534         }
5535
5536         xdr_read_pages(xdr, res->layoutp->len);
5537
5538         if (layout_count > 1) {
5539                 /* We only handle a length one array at the moment.  Any
5540                  * further entries are just ignored.  Note that this means
5541                  * the client may see a response that is less than the
5542                  * minimum it requested.
5543                  */
5544                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5545                         __func__, layout_count);
5546         }
5547
5548         return 0;
5549 out_overflow:
5550         print_overflow_msg(__func__, xdr);
5551         return -EIO;
5552 }
5553
5554 static int decode_layoutreturn(struct xdr_stream *xdr,
5555                                struct nfs4_layoutreturn_res *res)
5556 {
5557         __be32 *p;
5558         int status;
5559
5560         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5561         if (status)
5562                 return status;
5563         p = xdr_inline_decode(xdr, 4);
5564         if (unlikely(!p))
5565                 goto out_overflow;
5566         res->lrs_present = be32_to_cpup(p);
5567         if (res->lrs_present)
5568                 status = decode_stateid(xdr, &res->stateid);
5569         return status;
5570 out_overflow:
5571         print_overflow_msg(__func__, xdr);
5572         return -EIO;
5573 }
5574
5575 static int decode_layoutcommit(struct xdr_stream *xdr,
5576                                struct rpc_rqst *req,
5577                                struct nfs4_layoutcommit_res *res)
5578 {
5579         __be32 *p;
5580         __u32 sizechanged;
5581         int status;
5582
5583         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5584         res->status = status;
5585         if (status)
5586                 return status;
5587
5588         p = xdr_inline_decode(xdr, 4);
5589         if (unlikely(!p))
5590                 goto out_overflow;
5591         sizechanged = be32_to_cpup(p);
5592
5593         if (sizechanged) {
5594                 /* throw away new size */
5595                 p = xdr_inline_decode(xdr, 8);
5596                 if (unlikely(!p))
5597                         goto out_overflow;
5598         }
5599         return 0;
5600 out_overflow:
5601         print_overflow_msg(__func__, xdr);
5602         return -EIO;
5603 }
5604
5605 static int decode_test_stateid(struct xdr_stream *xdr,
5606                                struct nfs41_test_stateid_res *res)
5607 {
5608         __be32 *p;
5609         int status;
5610         int num_res;
5611
5612         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5613         if (status)
5614                 return status;
5615
5616         p = xdr_inline_decode(xdr, 4);
5617         if (unlikely(!p))
5618                 goto out_overflow;
5619         num_res = be32_to_cpup(p++);
5620         if (num_res != 1)
5621                 goto out;
5622
5623         p = xdr_inline_decode(xdr, 4);
5624         if (unlikely(!p))
5625                 goto out_overflow;
5626         res->status = be32_to_cpup(p++);
5627
5628         return status;
5629 out_overflow:
5630         print_overflow_msg(__func__, xdr);
5631 out:
5632         return -EIO;
5633 }
5634
5635 static int decode_free_stateid(struct xdr_stream *xdr,
5636                                struct nfs41_free_stateid_res *res)
5637 {
5638         __be32 *p;
5639         int status;
5640
5641         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5642         if (status)
5643                 return status;
5644
5645         p = xdr_inline_decode(xdr, 4);
5646         if (unlikely(!p))
5647                 goto out_overflow;
5648         res->status = be32_to_cpup(p++);
5649         return res->status;
5650 out_overflow:
5651         print_overflow_msg(__func__, xdr);
5652         return -EIO;
5653 }
5654 #endif /* CONFIG_NFS_V4_1 */
5655
5656 /*
5657  * END OF "GENERIC" DECODE ROUTINES.
5658  */
5659
5660 /*
5661  * Decode OPEN_DOWNGRADE response
5662  */
5663 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5664                                        struct xdr_stream *xdr,
5665                                        struct nfs_closeres *res)
5666 {
5667         struct compound_hdr hdr;
5668         int status;
5669
5670         status = decode_compound_hdr(xdr, &hdr);
5671         if (status)
5672                 goto out;
5673         status = decode_sequence(xdr, &res->seq_res, rqstp);
5674         if (status)
5675                 goto out;
5676         status = decode_putfh(xdr);
5677         if (status)
5678                 goto out;
5679         status = decode_open_downgrade(xdr, res);
5680         if (status != 0)
5681                 goto out;
5682         decode_getfattr(xdr, res->fattr, res->server);
5683 out:
5684         return status;
5685 }
5686
5687 /*
5688  * Decode ACCESS response
5689  */
5690 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5691                                struct nfs4_accessres *res)
5692 {
5693         struct compound_hdr hdr;
5694         int status;
5695
5696         status = decode_compound_hdr(xdr, &hdr);
5697         if (status)
5698                 goto out;
5699         status = decode_sequence(xdr, &res->seq_res, rqstp);
5700         if (status)
5701                 goto out;
5702         status = decode_putfh(xdr);
5703         if (status != 0)
5704                 goto out;
5705         status = decode_access(xdr, res);
5706         if (status != 0)
5707                 goto out;
5708         decode_getfattr(xdr, res->fattr, res->server);
5709 out:
5710         return status;
5711 }
5712
5713 /*
5714  * Decode LOOKUP response
5715  */
5716 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5717                                struct nfs4_lookup_res *res)
5718 {
5719         struct compound_hdr hdr;
5720         int status;
5721
5722         status = decode_compound_hdr(xdr, &hdr);
5723         if (status)
5724                 goto out;
5725         status = decode_sequence(xdr, &res->seq_res, rqstp);
5726         if (status)
5727                 goto out;
5728         status = decode_putfh(xdr);
5729         if (status)
5730                 goto out;
5731         status = decode_lookup(xdr);
5732         if (status)
5733                 goto out;
5734         status = decode_getfh(xdr, res->fh);
5735         if (status)
5736                 goto out;
5737         status = decode_getfattr(xdr, res->fattr, res->server);
5738 out:
5739         return status;
5740 }
5741
5742 /*
5743  * Decode LOOKUP_ROOT response
5744  */
5745 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5746                                     struct xdr_stream *xdr,
5747                                     struct nfs4_lookup_res *res)
5748 {
5749         struct compound_hdr hdr;
5750         int status;
5751
5752         status = decode_compound_hdr(xdr, &hdr);
5753         if (status)
5754                 goto out;
5755         status = decode_sequence(xdr, &res->seq_res, rqstp);
5756         if (status)
5757                 goto out;
5758         status = decode_putrootfh(xdr);
5759         if (status)
5760                 goto out;
5761         status = decode_getfh(xdr, res->fh);
5762         if (status == 0)
5763                 status = decode_getfattr(xdr, res->fattr, res->server);
5764 out:
5765         return status;
5766 }
5767
5768 /*
5769  * Decode REMOVE response
5770  */
5771 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5772                                struct nfs_removeres *res)
5773 {
5774         struct compound_hdr hdr;
5775         int status;
5776
5777         status = decode_compound_hdr(xdr, &hdr);
5778         if (status)
5779                 goto out;
5780         status = decode_sequence(xdr, &res->seq_res, rqstp);
5781         if (status)
5782                 goto out;
5783         status = decode_putfh(xdr);
5784         if (status)
5785                 goto out;
5786         status = decode_remove(xdr, &res->cinfo);
5787         if (status)
5788                 goto out;
5789         decode_getfattr(xdr, res->dir_attr, res->server);
5790 out:
5791         return status;
5792 }
5793
5794 /*
5795  * Decode RENAME response
5796  */
5797 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5798                                struct nfs_renameres *res)
5799 {
5800         struct compound_hdr hdr;
5801         int status;
5802
5803         status = decode_compound_hdr(xdr, &hdr);
5804         if (status)
5805                 goto out;
5806         status = decode_sequence(xdr, &res->seq_res, rqstp);
5807         if (status)
5808                 goto out;
5809         status = decode_putfh(xdr);
5810         if (status)
5811                 goto out;
5812         status = decode_savefh(xdr);
5813         if (status)
5814                 goto out;
5815         status = decode_putfh(xdr);
5816         if (status)
5817                 goto out;
5818         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5819         if (status)
5820                 goto out;
5821         /* Current FH is target directory */
5822         if (decode_getfattr(xdr, res->new_fattr, res->server))
5823                 goto out;
5824         status = decode_restorefh(xdr);
5825         if (status)
5826                 goto out;
5827         decode_getfattr(xdr, res->old_fattr, res->server);
5828 out:
5829         return status;
5830 }
5831
5832 /*
5833  * Decode LINK response
5834  */
5835 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5836                              struct nfs4_link_res *res)
5837 {
5838         struct compound_hdr hdr;
5839         int status;
5840
5841         status = decode_compound_hdr(xdr, &hdr);
5842         if (status)
5843                 goto out;
5844         status = decode_sequence(xdr, &res->seq_res, rqstp);
5845         if (status)
5846                 goto out;
5847         status = decode_putfh(xdr);
5848         if (status)
5849                 goto out;
5850         status = decode_savefh(xdr);
5851         if (status)
5852                 goto out;
5853         status = decode_putfh(xdr);
5854         if (status)
5855                 goto out;
5856         status = decode_link(xdr, &res->cinfo);
5857         if (status)
5858                 goto out;
5859         /*
5860          * Note order: OP_LINK leaves the directory as the current
5861          *             filehandle.
5862          */
5863         if (decode_getfattr(xdr, res->dir_attr, res->server))
5864                 goto out;
5865         status = decode_restorefh(xdr);
5866         if (status)
5867                 goto out;
5868         decode_getfattr(xdr, res->fattr, res->server);
5869 out:
5870         return status;
5871 }
5872
5873 /*
5874  * Decode CREATE response
5875  */
5876 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5877                                struct nfs4_create_res *res)
5878 {
5879         struct compound_hdr hdr;
5880         int status;
5881
5882         status = decode_compound_hdr(xdr, &hdr);
5883         if (status)
5884                 goto out;
5885         status = decode_sequence(xdr, &res->seq_res, rqstp);
5886         if (status)
5887                 goto out;
5888         status = decode_putfh(xdr);
5889         if (status)
5890                 goto out;
5891         status = decode_savefh(xdr);
5892         if (status)
5893                 goto out;
5894         status = decode_create(xdr, &res->dir_cinfo);
5895         if (status)
5896                 goto out;
5897         status = decode_getfh(xdr, res->fh);
5898         if (status)
5899                 goto out;
5900         if (decode_getfattr(xdr, res->fattr, res->server))
5901                 goto out;
5902         status = decode_restorefh(xdr);
5903         if (status)
5904                 goto out;
5905         decode_getfattr(xdr, res->dir_fattr, res->server);
5906 out:
5907         return status;
5908 }
5909
5910 /*
5911  * Decode SYMLINK response
5912  */
5913 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5914                                 struct nfs4_create_res *res)
5915 {
5916         return nfs4_xdr_dec_create(rqstp, xdr, res);
5917 }
5918
5919 /*
5920  * Decode GETATTR response
5921  */
5922 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5923                                 struct nfs4_getattr_res *res)
5924 {
5925         struct compound_hdr hdr;
5926         int status;
5927
5928         status = decode_compound_hdr(xdr, &hdr);
5929         if (status)
5930                 goto out;
5931         status = decode_sequence(xdr, &res->seq_res, rqstp);
5932         if (status)
5933                 goto out;
5934         status = decode_putfh(xdr);
5935         if (status)
5936                 goto out;
5937         status = decode_getfattr(xdr, res->fattr, res->server);
5938 out:
5939         return status;
5940 }
5941
5942 /*
5943  * Encode an SETACL request
5944  */
5945 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5946                                 struct nfs_setaclargs *args)
5947 {
5948         struct compound_hdr hdr = {
5949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5950         };
5951
5952         encode_compound_hdr(xdr, req, &hdr);
5953         encode_sequence(xdr, &args->seq_args, &hdr);
5954         encode_putfh(xdr, args->fh, &hdr);
5955         encode_setacl(xdr, args, &hdr);
5956         encode_nops(&hdr);
5957 }
5958
5959 /*
5960  * Decode SETACL response
5961  */
5962 static int
5963 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5964                     struct nfs_setaclres *res)
5965 {
5966         struct compound_hdr hdr;
5967         int status;
5968
5969         status = decode_compound_hdr(xdr, &hdr);
5970         if (status)
5971                 goto out;
5972         status = decode_sequence(xdr, &res->seq_res, rqstp);
5973         if (status)
5974                 goto out;
5975         status = decode_putfh(xdr);
5976         if (status)
5977                 goto out;
5978         status = decode_setattr(xdr);
5979 out:
5980         return status;
5981 }
5982
5983 /*
5984  * Decode GETACL response
5985  */
5986 static int
5987 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5988                     struct nfs_getaclres *res)
5989 {
5990         struct compound_hdr hdr;
5991         int status;
5992
5993         if (res->acl_scratch != NULL) {
5994                 void *p = page_address(res->acl_scratch);
5995                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
5996         }
5997         status = decode_compound_hdr(xdr, &hdr);
5998         if (status)
5999                 goto out;
6000         status = decode_sequence(xdr, &res->seq_res, rqstp);
6001         if (status)
6002                 goto out;
6003         status = decode_putfh(xdr);
6004         if (status)
6005                 goto out;
6006         status = decode_getacl(xdr, rqstp, res);
6007
6008 out:
6009         return status;
6010 }
6011
6012 /*
6013  * Decode CLOSE response
6014  */
6015 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016                               struct nfs_closeres *res)
6017 {
6018         struct compound_hdr hdr;
6019         int status;
6020
6021         status = decode_compound_hdr(xdr, &hdr);
6022         if (status)
6023                 goto out;
6024         status = decode_sequence(xdr, &res->seq_res, rqstp);
6025         if (status)
6026                 goto out;
6027         status = decode_putfh(xdr);
6028         if (status)
6029                 goto out;
6030         status = decode_close(xdr, res);
6031         if (status != 0)
6032                 goto out;
6033         /*
6034          * Note: Server may do delete on close for this file
6035          *      in which case the getattr call will fail with
6036          *      an ESTALE error. Shouldn't be a problem,
6037          *      though, since fattr->valid will remain unset.
6038          */
6039         decode_getfattr(xdr, res->fattr, res->server);
6040 out: