0b744895b9e19e80841abd899f6937585d1d209e
[linux-3.10.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
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY         NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO         EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN          20
73 #else
74 #define NFS4_MAXTAGLEN          0
75 #endif
76
77 /* lock,open owner id:
78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
79  */
80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz     (1 + 1 + 4)
82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz     (1)
86 #define op_decode_hdr_maxsz     (2)
87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
92                                 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
98                                 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 /* We support only one layout type per file system */
106 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
107 /* This is based on getfattr, which uses the most attributes: */
108 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
109                                 3 + 3 + 3 + nfs4_owner_maxsz + \
110                                 nfs4_group_maxsz + decode_mdsthreshold_maxsz))
111 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
112                                 nfs4_fattr_value_maxsz)
113 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
114 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
115                                  1 + 2 + 1 + \
116                                 nfs4_owner_maxsz + \
117                                 nfs4_group_maxsz + \
118                                 4 + 4)
119 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
120 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
121 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
122 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
123 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
124 /* The 5 accounts for the PNFS attributes, and assumes that at most three
125  * layout types will be returned.
126  */
127 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
128                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
129 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
130 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
131 #define encode_setclientid_maxsz \
132                                 (op_encode_hdr_maxsz + \
133                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
134                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
135                                 1 /* sc_prog */ + \
136                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
137                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
138                                 1) /* sc_cb_ident */
139 #define decode_setclientid_maxsz \
140                                 (op_decode_hdr_maxsz + \
141                                 2 + \
142                                 1024) /* large value for CLID_INUSE */
143 #define encode_setclientid_confirm_maxsz \
144                                 (op_encode_hdr_maxsz + \
145                                 3 + (NFS4_VERIFIER_SIZE >> 2))
146 #define decode_setclientid_confirm_maxsz \
147                                 (op_decode_hdr_maxsz)
148 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
149 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
150 #define encode_share_access_maxsz \
151                                 (2)
152 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
153 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
154 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
155 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
156                                 2 + encode_share_access_maxsz + 2 + \
157                                 open_owner_id_maxsz + \
158                                 encode_opentype_maxsz + \
159                                 encode_claim_null_maxsz)
160 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
161 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
162                                 decode_ace_maxsz)
163 #define decode_change_info_maxsz        (5)
164 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
165                                 decode_stateid_maxsz + \
166                                 decode_change_info_maxsz + 1 + \
167                                 nfs4_fattr_bitmap_maxsz + \
168                                 decode_delegation_maxsz)
169 #define encode_open_confirm_maxsz \
170                                 (op_encode_hdr_maxsz + \
171                                  encode_stateid_maxsz + 1)
172 #define decode_open_confirm_maxsz \
173                                 (op_decode_hdr_maxsz + \
174                                  decode_stateid_maxsz)
175 #define encode_open_downgrade_maxsz \
176                                 (op_encode_hdr_maxsz + \
177                                  encode_stateid_maxsz + 1 + \
178                                  encode_share_access_maxsz)
179 #define decode_open_downgrade_maxsz \
180                                 (op_decode_hdr_maxsz + \
181                                  decode_stateid_maxsz)
182 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
183                                  1 + encode_stateid_maxsz)
184 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
185                                  decode_stateid_maxsz)
186 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
187                                  encode_stateid_maxsz + \
188                                  encode_attrs_maxsz)
189 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
190                                  nfs4_fattr_bitmap_maxsz)
191 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
192                                  encode_stateid_maxsz + 3)
193 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
194 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
195                                  2 + encode_verifier_maxsz + 5)
196 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
197                                  decode_verifier_maxsz)
198 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
199 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
200 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
201                                  encode_stateid_maxsz + 4)
202 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
203                                  2 + decode_verifier_maxsz)
204 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
205 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
206                                  decode_verifier_maxsz)
207 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
208                                 nfs4_name_maxsz)
209 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
210                                  decode_change_info_maxsz)
211 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
212                                 2 * nfs4_name_maxsz)
213 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
214                                  decode_change_info_maxsz + \
215                                  decode_change_info_maxsz)
216 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
217                                 nfs4_name_maxsz)
218 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
219 #define encode_lockowner_maxsz  (7)
220 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
221                                  7 + \
222                                  1 + encode_stateid_maxsz + 1 + \
223                                  encode_lockowner_maxsz)
224 #define decode_lock_denied_maxsz \
225                                 (8 + decode_lockowner_maxsz)
226 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
227                                  decode_lock_denied_maxsz)
228 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
229                                 encode_lockowner_maxsz)
230 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
231                                  decode_lock_denied_maxsz)
232 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
233                                  encode_stateid_maxsz + \
234                                  4)
235 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
236                                  decode_stateid_maxsz)
237 #define encode_release_lockowner_maxsz \
238                                 (op_encode_hdr_maxsz + \
239                                  encode_lockowner_maxsz)
240 #define decode_release_lockowner_maxsz \
241                                 (op_decode_hdr_maxsz)
242 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
243 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
244 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
245                                 1 + nfs4_name_maxsz + \
246                                 1 + \
247                                 nfs4_fattr_maxsz)
248 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
249 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
250                                 1 + 2 + nfs4_name_maxsz + \
251                                 encode_attrs_maxsz)
252 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
253                                 decode_change_info_maxsz + \
254                                 nfs4_fattr_bitmap_maxsz)
255 #define encode_statfs_maxsz     (encode_getattr_maxsz)
256 #define decode_statfs_maxsz     (decode_getattr_maxsz)
257 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
258 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
259 #define encode_getacl_maxsz     (encode_getattr_maxsz)
260 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
261                                  nfs4_fattr_bitmap_maxsz + 1)
262 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
263                                  encode_stateid_maxsz + 3)
264 #define decode_setacl_maxsz     (decode_setattr_maxsz)
265 #define encode_fs_locations_maxsz \
266                                 (encode_getattr_maxsz)
267 #define decode_fs_locations_maxsz \
268                                 (0)
269 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
270 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
271
272 #if defined(CONFIG_NFS_V4_1)
273 #define NFS4_MAX_MACHINE_NAME_LEN (64)
274 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
275                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
276
277 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
278                                 encode_verifier_maxsz + \
279                                 1 /* co_ownerid.len */ + \
280                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
281                                 1 /* flags */ + \
282                                 1 /* spa_how */ + \
283                                 0 /* SP4_NONE (for now) */ + \
284                                 1 /* implementation id array of size 1 */ + \
285                                 1 /* nii_domain */ + \
286                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
287                                 1 /* nii_name */ + \
288                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
289                                 3 /* nii_date */)
290 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
291                                 2 /* eir_clientid */ + \
292                                 1 /* eir_sequenceid */ + \
293                                 1 /* eir_flags */ + \
294                                 1 /* spr_how */ + \
295                                 0 /* SP4_NONE (for now) */ + \
296                                 2 /* eir_server_owner.so_minor_id */ + \
297                                 /* eir_server_owner.so_major_id<> */ \
298                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
299                                 /* eir_server_scope<> */ \
300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
301                                 1 /* eir_server_impl_id array length */ + \
302                                 1 /* nii_domain */ + \
303                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
304                                 1 /* nii_name */ + \
305                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
306                                 3 /* nii_date */)
307 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
308 #define decode_channel_attrs_maxsz  (6 + \
309                                      1 /* ca_rdma_ird.len */ + \
310                                      1 /* ca_rdma_ird */)
311 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
312                                      2 /* csa_clientid */ + \
313                                      1 /* csa_sequence */ + \
314                                      1 /* csa_flags */ + \
315                                      encode_channel_attrs_maxsz + \
316                                      encode_channel_attrs_maxsz + \
317                                      1 /* csa_cb_program */ + \
318                                      1 /* csa_sec_parms.len (1) */ + \
319                                      1 /* cb_secflavor (AUTH_SYS) */ + \
320                                      1 /* stamp */ + \
321                                      1 /* machinename.len */ + \
322                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
323                                      1 /* uid */ + \
324                                      1 /* gid */ + \
325                                      1 /* gids.len (0) */)
326 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
327                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
328                                      1 /* csr_sequence */ + \
329                                      1 /* csr_flags */ + \
330                                      decode_channel_attrs_maxsz + \
331                                      decode_channel_attrs_maxsz)
332 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
333                                      /* bctsa_sessid */ \
334                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
335                                      1 /* bctsa_dir */ + \
336                                      1 /* bctsa_use_conn_in_rdma_mode */)
337 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
338                                      /* bctsr_sessid */ \
339                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
340                                      1 /* bctsr_dir */ + \
341                                      1 /* bctsr_use_conn_in_rdma_mode */)
342 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
343 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
344 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
345 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
346 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
347                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
348 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
349                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
350 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
351 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
352 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
353                                 encode_verifier_maxsz)
354 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
355                                 2 /* nfs_cookie4 gdlr_cookie */ + \
356                                 decode_verifier_maxsz \
357                                   /* verifier4 gdlr_verifier */ + \
358                                 1 /* gdlr_deviceid_list count */ + \
359                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
360                                             NFS4_DEVICEID4_SIZE) \
361                                   /* gdlr_deviceid_list */ + \
362                                 1 /* bool gdlr_eof */)
363 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
364                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
365 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
366                                 1 /* layout type */ + \
367                                 1 /* opaque devaddr4 length */ + \
368                                   /* devaddr4 payload is read into page */ \
369                                 1 /* notification bitmap length */ + \
370                                 1 /* notification bitmap */)
371 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
372                                 encode_stateid_maxsz)
373 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
374                                 decode_stateid_maxsz + \
375                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
376 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
377                                 2 /* offset */ + \
378                                 2 /* length */ + \
379                                 1 /* reclaim */ + \
380                                 encode_stateid_maxsz + \
381                                 1 /* new offset (true) */ + \
382                                 2 /* last byte written */ + \
383                                 1 /* nt_timechanged (false) */ + \
384                                 1 /* layoutupdate4 layout type */ + \
385                                 1 /* NULL filelayout layoutupdate4 payload */)
386 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
387 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
388                                 encode_stateid_maxsz + \
389                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
390 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
391                                 1 + decode_stateid_maxsz)
392 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
393 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
394 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
395                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
396 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
397 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
398                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
399 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
400 #else /* CONFIG_NFS_V4_1 */
401 #define encode_sequence_maxsz   0
402 #define decode_sequence_maxsz   0
403 #endif /* CONFIG_NFS_V4_1 */
404
405 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
406 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
407 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
408                                 encode_sequence_maxsz + \
409                                 encode_putfh_maxsz + \
410                                 encode_read_maxsz)
411 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
412                                 decode_sequence_maxsz + \
413                                 decode_putfh_maxsz + \
414                                 decode_read_maxsz)
415 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
416                                 encode_sequence_maxsz + \
417                                 encode_putfh_maxsz + \
418                                 encode_readlink_maxsz)
419 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
420                                 decode_sequence_maxsz + \
421                                 decode_putfh_maxsz + \
422                                 decode_readlink_maxsz)
423 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
424                                 encode_sequence_maxsz + \
425                                 encode_putfh_maxsz + \
426                                 encode_readdir_maxsz)
427 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
428                                 decode_sequence_maxsz + \
429                                 decode_putfh_maxsz + \
430                                 decode_readdir_maxsz)
431 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
432                                 encode_sequence_maxsz + \
433                                 encode_putfh_maxsz + \
434                                 encode_write_maxsz + \
435                                 encode_getattr_maxsz)
436 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
437                                 decode_sequence_maxsz + \
438                                 decode_putfh_maxsz + \
439                                 decode_write_maxsz + \
440                                 decode_getattr_maxsz)
441 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
442                                 encode_sequence_maxsz + \
443                                 encode_putfh_maxsz + \
444                                 encode_commit_maxsz)
445 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
446                                 decode_sequence_maxsz + \
447                                 decode_putfh_maxsz + \
448                                 decode_commit_maxsz)
449 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
450                                 encode_sequence_maxsz + \
451                                 encode_putfh_maxsz + \
452                                 encode_open_maxsz + \
453                                 encode_access_maxsz + \
454                                 encode_getfh_maxsz + \
455                                 encode_getattr_maxsz)
456 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
457                                 decode_sequence_maxsz + \
458                                 decode_putfh_maxsz + \
459                                 decode_open_maxsz + \
460                                 decode_access_maxsz + \
461                                 decode_getfh_maxsz + \
462                                 decode_getattr_maxsz)
463 #define NFS4_enc_open_confirm_sz \
464                                 (compound_encode_hdr_maxsz + \
465                                  encode_putfh_maxsz + \
466                                  encode_open_confirm_maxsz)
467 #define NFS4_dec_open_confirm_sz \
468                                 (compound_decode_hdr_maxsz + \
469                                  decode_putfh_maxsz + \
470                                  decode_open_confirm_maxsz)
471 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
472                                         encode_sequence_maxsz + \
473                                         encode_putfh_maxsz + \
474                                         encode_open_maxsz + \
475                                         encode_access_maxsz + \
476                                         encode_getattr_maxsz)
477 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
478                                         decode_sequence_maxsz + \
479                                         decode_putfh_maxsz + \
480                                         decode_open_maxsz + \
481                                         decode_access_maxsz + \
482                                         decode_getattr_maxsz)
483 #define NFS4_enc_open_downgrade_sz \
484                                 (compound_encode_hdr_maxsz + \
485                                  encode_sequence_maxsz + \
486                                  encode_putfh_maxsz + \
487                                  encode_open_downgrade_maxsz + \
488                                  encode_getattr_maxsz)
489 #define NFS4_dec_open_downgrade_sz \
490                                 (compound_decode_hdr_maxsz + \
491                                  decode_sequence_maxsz + \
492                                  decode_putfh_maxsz + \
493                                  decode_open_downgrade_maxsz + \
494                                  decode_getattr_maxsz)
495 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
496                                  encode_sequence_maxsz + \
497                                  encode_putfh_maxsz + \
498                                  encode_close_maxsz + \
499                                  encode_getattr_maxsz)
500 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
501                                  decode_sequence_maxsz + \
502                                  decode_putfh_maxsz + \
503                                  decode_close_maxsz + \
504                                  decode_getattr_maxsz)
505 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
506                                  encode_sequence_maxsz + \
507                                  encode_putfh_maxsz + \
508                                  encode_setattr_maxsz + \
509                                  encode_getattr_maxsz)
510 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
511                                  decode_sequence_maxsz + \
512                                  decode_putfh_maxsz + \
513                                  decode_setattr_maxsz + \
514                                  decode_getattr_maxsz)
515 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
516                                 encode_sequence_maxsz + \
517                                 encode_putfh_maxsz + \
518                                 encode_fsinfo_maxsz)
519 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
520                                 decode_sequence_maxsz + \
521                                 decode_putfh_maxsz + \
522                                 decode_fsinfo_maxsz)
523 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
524                                 encode_renew_maxsz)
525 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
526                                 decode_renew_maxsz)
527 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
528                                 encode_setclientid_maxsz)
529 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
530                                 decode_setclientid_maxsz)
531 #define NFS4_enc_setclientid_confirm_sz \
532                                 (compound_encode_hdr_maxsz + \
533                                 encode_setclientid_confirm_maxsz + \
534                                 encode_putrootfh_maxsz + \
535                                 encode_fsinfo_maxsz)
536 #define NFS4_dec_setclientid_confirm_sz \
537                                 (compound_decode_hdr_maxsz + \
538                                 decode_setclientid_confirm_maxsz + \
539                                 decode_putrootfh_maxsz + \
540                                 decode_fsinfo_maxsz)
541 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
542                                 encode_sequence_maxsz + \
543                                 encode_putfh_maxsz + \
544                                 encode_lock_maxsz)
545 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
546                                 decode_sequence_maxsz + \
547                                 decode_putfh_maxsz + \
548                                 decode_lock_maxsz)
549 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
550                                 encode_sequence_maxsz + \
551                                 encode_putfh_maxsz + \
552                                 encode_lockt_maxsz)
553 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
554                                  decode_sequence_maxsz + \
555                                  decode_putfh_maxsz + \
556                                  decode_lockt_maxsz)
557 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
558                                 encode_sequence_maxsz + \
559                                 encode_putfh_maxsz + \
560                                 encode_locku_maxsz)
561 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
562                                 decode_sequence_maxsz + \
563                                 decode_putfh_maxsz + \
564                                 decode_locku_maxsz)
565 #define NFS4_enc_release_lockowner_sz \
566                                 (compound_encode_hdr_maxsz + \
567                                  encode_lockowner_maxsz)
568 #define NFS4_dec_release_lockowner_sz \
569                                 (compound_decode_hdr_maxsz + \
570                                  decode_lockowner_maxsz)
571 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
572                                 encode_sequence_maxsz + \
573                                 encode_putfh_maxsz + \
574                                 encode_access_maxsz + \
575                                 encode_getattr_maxsz)
576 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
577                                 decode_sequence_maxsz + \
578                                 decode_putfh_maxsz + \
579                                 decode_access_maxsz + \
580                                 decode_getattr_maxsz)
581 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
582                                 encode_sequence_maxsz + \
583                                 encode_putfh_maxsz + \
584                                 encode_getattr_maxsz)
585 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
586                                 decode_sequence_maxsz + \
587                                 decode_putfh_maxsz + \
588                                 decode_getattr_maxsz)
589 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
590                                 encode_sequence_maxsz + \
591                                 encode_putfh_maxsz + \
592                                 encode_lookup_maxsz + \
593                                 encode_getattr_maxsz + \
594                                 encode_getfh_maxsz)
595 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
596                                 decode_sequence_maxsz + \
597                                 decode_putfh_maxsz + \
598                                 decode_lookup_maxsz + \
599                                 decode_getattr_maxsz + \
600                                 decode_getfh_maxsz)
601 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
602                                 encode_sequence_maxsz + \
603                                 encode_putrootfh_maxsz + \
604                                 encode_getattr_maxsz + \
605                                 encode_getfh_maxsz)
606 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
607                                 decode_sequence_maxsz + \
608                                 decode_putrootfh_maxsz + \
609                                 decode_getattr_maxsz + \
610                                 decode_getfh_maxsz)
611 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
612                                 encode_sequence_maxsz + \
613                                 encode_putfh_maxsz + \
614                                 encode_remove_maxsz)
615 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
616                                 decode_sequence_maxsz + \
617                                 decode_putfh_maxsz + \
618                                 decode_remove_maxsz)
619 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
620                                 encode_sequence_maxsz + \
621                                 encode_putfh_maxsz + \
622                                 encode_savefh_maxsz + \
623                                 encode_putfh_maxsz + \
624                                 encode_rename_maxsz)
625 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
626                                 decode_sequence_maxsz + \
627                                 decode_putfh_maxsz + \
628                                 decode_savefh_maxsz + \
629                                 decode_putfh_maxsz + \
630                                 decode_rename_maxsz)
631 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
632                                 encode_sequence_maxsz + \
633                                 encode_putfh_maxsz + \
634                                 encode_savefh_maxsz + \
635                                 encode_putfh_maxsz + \
636                                 encode_link_maxsz + \
637                                 encode_restorefh_maxsz + \
638                                 encode_getattr_maxsz)
639 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
640                                 decode_sequence_maxsz + \
641                                 decode_putfh_maxsz + \
642                                 decode_savefh_maxsz + \
643                                 decode_putfh_maxsz + \
644                                 decode_link_maxsz + \
645                                 decode_restorefh_maxsz + \
646                                 decode_getattr_maxsz)
647 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
648                                 encode_sequence_maxsz + \
649                                 encode_putfh_maxsz + \
650                                 encode_symlink_maxsz + \
651                                 encode_getattr_maxsz + \
652                                 encode_getfh_maxsz)
653 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
654                                 decode_sequence_maxsz + \
655                                 decode_putfh_maxsz + \
656                                 decode_symlink_maxsz + \
657                                 decode_getattr_maxsz + \
658                                 decode_getfh_maxsz)
659 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
660                                 encode_sequence_maxsz + \
661                                 encode_putfh_maxsz + \
662                                 encode_create_maxsz + \
663                                 encode_getfh_maxsz + \
664                                 encode_getattr_maxsz)
665 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
666                                 decode_sequence_maxsz + \
667                                 decode_putfh_maxsz + \
668                                 decode_create_maxsz + \
669                                 decode_getfh_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_bind_conn_to_session_sz \
742                                 (compound_encode_hdr_maxsz + \
743                                  encode_bind_conn_to_session_maxsz)
744 #define NFS4_dec_bind_conn_to_session_sz \
745                                 (compound_decode_hdr_maxsz + \
746                                  decode_bind_conn_to_session_maxsz)
747 #define NFS4_enc_exchange_id_sz \
748                                 (compound_encode_hdr_maxsz + \
749                                  encode_exchange_id_maxsz)
750 #define NFS4_dec_exchange_id_sz \
751                                 (compound_decode_hdr_maxsz + \
752                                  decode_exchange_id_maxsz)
753 #define NFS4_enc_create_session_sz \
754                                 (compound_encode_hdr_maxsz + \
755                                  encode_create_session_maxsz)
756 #define NFS4_dec_create_session_sz \
757                                 (compound_decode_hdr_maxsz + \
758                                  decode_create_session_maxsz)
759 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
760                                          encode_destroy_session_maxsz)
761 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
762                                          decode_destroy_session_maxsz)
763 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
764                                          encode_destroy_clientid_maxsz)
765 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
766                                          decode_destroy_clientid_maxsz)
767 #define NFS4_enc_sequence_sz \
768                                 (compound_decode_hdr_maxsz + \
769                                  encode_sequence_maxsz)
770 #define NFS4_dec_sequence_sz \
771                                 (compound_decode_hdr_maxsz + \
772                                  decode_sequence_maxsz)
773 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
774                                          encode_sequence_maxsz + \
775                                          encode_putrootfh_maxsz + \
776                                          encode_fsinfo_maxsz)
777 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
778                                          decode_sequence_maxsz + \
779                                          decode_putrootfh_maxsz + \
780                                          decode_fsinfo_maxsz)
781 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
782                                          encode_sequence_maxsz + \
783                                          encode_reclaim_complete_maxsz)
784 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
785                                          decode_sequence_maxsz + \
786                                          decode_reclaim_complete_maxsz)
787 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
788                                 encode_sequence_maxsz + \
789                                 encode_putfh_maxsz + \
790                                 encode_getdevicelist_maxsz)
791 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
792                                 decode_sequence_maxsz + \
793                                 decode_putfh_maxsz + \
794                                 decode_getdevicelist_maxsz)
795 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
796                                 encode_sequence_maxsz +\
797                                 encode_getdeviceinfo_maxsz)
798 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
799                                 decode_sequence_maxsz + \
800                                 decode_getdeviceinfo_maxsz)
801 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
802                                 encode_sequence_maxsz + \
803                                 encode_putfh_maxsz +        \
804                                 encode_layoutget_maxsz)
805 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
806                                 decode_sequence_maxsz + \
807                                 decode_putfh_maxsz +        \
808                                 decode_layoutget_maxsz)
809 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
810                                 encode_sequence_maxsz +\
811                                 encode_putfh_maxsz + \
812                                 encode_layoutcommit_maxsz + \
813                                 encode_getattr_maxsz)
814 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
815                                 decode_sequence_maxsz + \
816                                 decode_putfh_maxsz + \
817                                 decode_layoutcommit_maxsz + \
818                                 decode_getattr_maxsz)
819 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
820                                 encode_sequence_maxsz + \
821                                 encode_putfh_maxsz + \
822                                 encode_layoutreturn_maxsz)
823 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
824                                 decode_sequence_maxsz + \
825                                 decode_putfh_maxsz + \
826                                 decode_layoutreturn_maxsz)
827 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
828                                         encode_sequence_maxsz + \
829                                         encode_putrootfh_maxsz +\
830                                         encode_secinfo_no_name_maxsz)
831 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
832                                         decode_sequence_maxsz + \
833                                         decode_putrootfh_maxsz + \
834                                         decode_secinfo_no_name_maxsz)
835 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
836                                          encode_sequence_maxsz + \
837                                          encode_test_stateid_maxsz)
838 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
839                                          decode_sequence_maxsz + \
840                                          decode_test_stateid_maxsz)
841 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
842                                          encode_sequence_maxsz + \
843                                          encode_free_stateid_maxsz)
844 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
845                                          decode_sequence_maxsz + \
846                                          decode_free_stateid_maxsz)
847
848 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
849                                       compound_encode_hdr_maxsz +
850                                       encode_sequence_maxsz +
851                                       encode_putfh_maxsz +
852                                       encode_getattr_maxsz) *
853                                      XDR_UNIT);
854
855 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
856                                      compound_decode_hdr_maxsz +
857                                      decode_sequence_maxsz +
858                                      decode_putfh_maxsz) *
859                                     XDR_UNIT);
860 #endif /* CONFIG_NFS_V4_1 */
861
862 static const umode_t nfs_type2fmt[] = {
863         [NF4BAD] = 0,
864         [NF4REG] = S_IFREG,
865         [NF4DIR] = S_IFDIR,
866         [NF4BLK] = S_IFBLK,
867         [NF4CHR] = S_IFCHR,
868         [NF4LNK] = S_IFLNK,
869         [NF4SOCK] = S_IFSOCK,
870         [NF4FIFO] = S_IFIFO,
871         [NF4ATTRDIR] = 0,
872         [NF4NAMEDATTR] = 0,
873 };
874
875 struct compound_hdr {
876         int32_t         status;
877         uint32_t        nops;
878         __be32 *        nops_p;
879         uint32_t        taglen;
880         char *          tag;
881         uint32_t        replen;         /* expected reply words */
882         u32             minorversion;
883 };
884
885 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
886 {
887         __be32 *p = xdr_reserve_space(xdr, nbytes);
888         BUG_ON(!p);
889         return p;
890 }
891
892 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
893 {
894         __be32 *p;
895
896         p = xdr_reserve_space(xdr, len);
897         xdr_encode_opaque_fixed(p, buf, len);
898 }
899
900 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
901 {
902         __be32 *p;
903
904         p = reserve_space(xdr, 4 + len);
905         xdr_encode_opaque(p, str, len);
906 }
907
908 static void encode_uint32(struct xdr_stream *xdr, u32 n)
909 {
910         __be32 *p;
911
912         p = reserve_space(xdr, 4);
913         *p = cpu_to_be32(n);
914 }
915
916 static void encode_uint64(struct xdr_stream *xdr, u64 n)
917 {
918         __be32 *p;
919
920         p = reserve_space(xdr, 8);
921         xdr_encode_hyper(p, n);
922 }
923
924 static void encode_nfs4_seqid(struct xdr_stream *xdr,
925                 const struct nfs_seqid *seqid)
926 {
927         encode_uint32(xdr, seqid->sequence->counter);
928 }
929
930 static void encode_compound_hdr(struct xdr_stream *xdr,
931                                 struct rpc_rqst *req,
932                                 struct compound_hdr *hdr)
933 {
934         __be32 *p;
935         struct rpc_auth *auth = req->rq_cred->cr_auth;
936
937         /* initialize running count of expected bytes in reply.
938          * NOTE: the replied tag SHOULD be the same is the one sent,
939          * but this is not required as a MUST for the server to do so. */
940         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
941
942         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
943         encode_string(xdr, hdr->taglen, hdr->tag);
944         p = reserve_space(xdr, 8);
945         *p++ = cpu_to_be32(hdr->minorversion);
946         hdr->nops_p = p;
947         *p = cpu_to_be32(hdr->nops);
948 }
949
950 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
951                 uint32_t replen,
952                 struct compound_hdr *hdr)
953 {
954         encode_uint32(xdr, op);
955         hdr->nops++;
956         hdr->replen += replen;
957 }
958
959 static void encode_nops(struct compound_hdr *hdr)
960 {
961         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
962         *hdr->nops_p = htonl(hdr->nops);
963 }
964
965 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
966 {
967         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
968 }
969
970 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
971 {
972         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
973 }
974
975 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
976 {
977         char owner_name[IDMAP_NAMESZ];
978         char owner_group[IDMAP_NAMESZ];
979         int owner_namelen = 0;
980         int owner_grouplen = 0;
981         __be32 *p;
982         __be32 *q;
983         int len;
984         uint32_t bmval0 = 0;
985         uint32_t bmval1 = 0;
986
987         /*
988          * We reserve enough space to write the entire attribute buffer at once.
989          * In the worst-case, this would be
990          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
991          *          = 36 bytes, plus any contribution from variable-length fields
992          *            such as owner/group.
993          */
994         len = 16;
995
996         /* Sigh */
997         if (iap->ia_valid & ATTR_SIZE)
998                 len += 8;
999         if (iap->ia_valid & ATTR_MODE)
1000                 len += 4;
1001         if (iap->ia_valid & ATTR_UID) {
1002                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1003                 if (owner_namelen < 0) {
1004                         dprintk("nfs: couldn't resolve uid %d to string\n",
1005                                         from_kuid(&init_user_ns, iap->ia_uid));
1006                         /* XXX */
1007                         strcpy(owner_name, "nobody");
1008                         owner_namelen = sizeof("nobody") - 1;
1009                         /* goto out; */
1010                 }
1011                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1012         }
1013         if (iap->ia_valid & ATTR_GID) {
1014                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1015                 if (owner_grouplen < 0) {
1016                         dprintk("nfs: couldn't resolve gid %d to string\n",
1017                                         from_kgid(&init_user_ns, iap->ia_gid));
1018                         strcpy(owner_group, "nobody");
1019                         owner_grouplen = sizeof("nobody") - 1;
1020                         /* goto out; */
1021                 }
1022                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1023         }
1024         if (iap->ia_valid & ATTR_ATIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_ATIME)
1027                 len += 4;
1028         if (iap->ia_valid & ATTR_MTIME_SET)
1029                 len += 16;
1030         else if (iap->ia_valid & ATTR_MTIME)
1031                 len += 4;
1032         p = reserve_space(xdr, len);
1033
1034         /*
1035          * We write the bitmap length now, but leave the bitmap and the attribute
1036          * buffer length to be backfilled at the end of this routine.
1037          */
1038         *p++ = cpu_to_be32(2);
1039         q = p;
1040         p += 3;
1041
1042         if (iap->ia_valid & ATTR_SIZE) {
1043                 bmval0 |= FATTR4_WORD0_SIZE;
1044                 p = xdr_encode_hyper(p, iap->ia_size);
1045         }
1046         if (iap->ia_valid & ATTR_MODE) {
1047                 bmval1 |= FATTR4_WORD1_MODE;
1048                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1049         }
1050         if (iap->ia_valid & ATTR_UID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER;
1052                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1053         }
1054         if (iap->ia_valid & ATTR_GID) {
1055                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1056                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1057         }
1058         if (iap->ia_valid & ATTR_ATIME_SET) {
1059                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1060                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1061                 *p++ = cpu_to_be32(0);
1062                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1063                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1064         }
1065         else if (iap->ia_valid & ATTR_ATIME) {
1066                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1067                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1068         }
1069         if (iap->ia_valid & ATTR_MTIME_SET) {
1070                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1072                 *p++ = cpu_to_be32(0);
1073                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1074                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1075         }
1076         else if (iap->ia_valid & ATTR_MTIME) {
1077                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1079         }
1080
1081         /*
1082          * Now we backfill the bitmap and the attribute buffer length.
1083          */
1084         if (len != ((char *)p - (char *)q) + 4) {
1085                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1086                                 len, ((char *)p - (char *)q) + 4);
1087                 BUG();
1088         }
1089         len = (char *)p - (char *)q - 12;
1090         *q++ = htonl(bmval0);
1091         *q++ = htonl(bmval1);
1092         *q = htonl(len);
1093
1094 /* out: */
1095 }
1096
1097 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1098 {
1099         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1100         encode_uint32(xdr, access);
1101 }
1102
1103 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1104 {
1105         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1106         encode_nfs4_seqid(xdr, arg->seqid);
1107         encode_nfs4_stateid(xdr, arg->stateid);
1108 }
1109
1110 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1111 {
1112         __be32 *p;
1113
1114         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1115         p = reserve_space(xdr, 12);
1116         p = xdr_encode_hyper(p, args->offset);
1117         *p = cpu_to_be32(args->count);
1118 }
1119
1120 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1121 {
1122         __be32 *p;
1123
1124         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1125         encode_uint32(xdr, create->ftype);
1126
1127         switch (create->ftype) {
1128         case NF4LNK:
1129                 p = reserve_space(xdr, 4);
1130                 *p = cpu_to_be32(create->u.symlink.len);
1131                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1132                 break;
1133
1134         case NF4BLK: case NF4CHR:
1135                 p = reserve_space(xdr, 8);
1136                 *p++ = cpu_to_be32(create->u.device.specdata1);
1137                 *p = cpu_to_be32(create->u.device.specdata2);
1138                 break;
1139
1140         default:
1141                 break;
1142         }
1143
1144         encode_string(xdr, create->name->len, create->name->name);
1145         encode_attrs(xdr, create->attrs, create->server);
1146 }
1147
1148 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1149 {
1150         __be32 *p;
1151
1152         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1153         p = reserve_space(xdr, 8);
1154         *p++ = cpu_to_be32(1);
1155         *p = cpu_to_be32(bitmap);
1156 }
1157
1158 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1159 {
1160         __be32 *p;
1161
1162         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1163         p = reserve_space(xdr, 12);
1164         *p++ = cpu_to_be32(2);
1165         *p++ = cpu_to_be32(bm0);
1166         *p = cpu_to_be32(bm1);
1167 }
1168
1169 static void
1170 encode_getattr_three(struct xdr_stream *xdr,
1171                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1172                      struct compound_hdr *hdr)
1173 {
1174         __be32 *p;
1175
1176         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1177         if (bm2) {
1178                 p = reserve_space(xdr, 16);
1179                 *p++ = cpu_to_be32(3);
1180                 *p++ = cpu_to_be32(bm0);
1181                 *p++ = cpu_to_be32(bm1);
1182                 *p = cpu_to_be32(bm2);
1183         } else if (bm1) {
1184                 p = reserve_space(xdr, 12);
1185                 *p++ = cpu_to_be32(2);
1186                 *p++ = cpu_to_be32(bm0);
1187                 *p = cpu_to_be32(bm1);
1188         } else {
1189                 p = reserve_space(xdr, 8);
1190                 *p++ = cpu_to_be32(1);
1191                 *p = cpu_to_be32(bm0);
1192         }
1193 }
1194
1195 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1196 {
1197         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1198                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1199 }
1200
1201 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1202                                  const u32 *open_bitmap,
1203                                  struct compound_hdr *hdr)
1204 {
1205         encode_getattr_three(xdr,
1206                              bitmask[0] & open_bitmap[0],
1207                              bitmask[1] & open_bitmap[1],
1208                              bitmask[2] & open_bitmap[2],
1209                              hdr);
1210 }
1211
1212 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1213 {
1214         encode_getattr_three(xdr,
1215                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1216                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1217                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1218                              hdr);
1219 }
1220
1221 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1222 {
1223         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1224                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1225 }
1226
1227 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1228 {
1229         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1230 }
1231
1232 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1233 {
1234         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1235         encode_string(xdr, name->len, name->name);
1236 }
1237
1238 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1239 {
1240         if (fl->fl_type == F_RDLCK)
1241                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1242         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1243 }
1244
1245 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1246 {
1247         if (fl->fl_end == OFFSET_MAX)
1248                 return ~(uint64_t)0;
1249         return fl->fl_end - fl->fl_start + 1;
1250 }
1251
1252 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1253 {
1254         __be32 *p;
1255
1256         p = reserve_space(xdr, 32);
1257         p = xdr_encode_hyper(p, lowner->clientid);
1258         *p++ = cpu_to_be32(20);
1259         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1260         *p++ = cpu_to_be32(lowner->s_dev);
1261         xdr_encode_hyper(p, lowner->id);
1262 }
1263
1264 /*
1265  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1266  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1267  */
1268 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1269 {
1270         __be32 *p;
1271
1272         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1273         p = reserve_space(xdr, 28);
1274         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1275         *p++ = cpu_to_be32(args->reclaim);
1276         p = xdr_encode_hyper(p, args->fl->fl_start);
1277         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1278         *p = cpu_to_be32(args->new_lock_owner);
1279         if (args->new_lock_owner){
1280                 encode_nfs4_seqid(xdr, args->open_seqid);
1281                 encode_nfs4_stateid(xdr, args->open_stateid);
1282                 encode_nfs4_seqid(xdr, args->lock_seqid);
1283                 encode_lockowner(xdr, &args->lock_owner);
1284         }
1285         else {
1286                 encode_nfs4_stateid(xdr, args->lock_stateid);
1287                 encode_nfs4_seqid(xdr, args->lock_seqid);
1288         }
1289 }
1290
1291 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1292 {
1293         __be32 *p;
1294
1295         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1296         p = reserve_space(xdr, 20);
1297         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1298         p = xdr_encode_hyper(p, args->fl->fl_start);
1299         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1300         encode_lockowner(xdr, &args->lock_owner);
1301 }
1302
1303 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1308         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1309         encode_nfs4_seqid(xdr, args->seqid);
1310         encode_nfs4_stateid(xdr, args->stateid);
1311         p = reserve_space(xdr, 16);
1312         p = xdr_encode_hyper(p, args->fl->fl_start);
1313         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1314 }
1315
1316 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1317 {
1318         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1319         encode_lockowner(xdr, lowner);
1320 }
1321
1322 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1323 {
1324         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1325         encode_string(xdr, name->len, name->name);
1326 }
1327
1328 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1329 {
1330         __be32 *p;
1331
1332         p = reserve_space(xdr, 8);
1333         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1334         case FMODE_READ:
1335                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1336                 break;
1337         case FMODE_WRITE:
1338                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1339                 break;
1340         case FMODE_READ|FMODE_WRITE:
1341                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1342                 break;
1343         default:
1344                 *p++ = cpu_to_be32(0);
1345         }
1346         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1347 }
1348
1349 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1350 {
1351         __be32 *p;
1352  /*
1353  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1354  * owner 4 = 32
1355  */
1356         encode_nfs4_seqid(xdr, arg->seqid);
1357         encode_share_access(xdr, arg->fmode);
1358         p = reserve_space(xdr, 36);
1359         p = xdr_encode_hyper(p, arg->clientid);
1360         *p++ = cpu_to_be32(24);
1361         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1362         *p++ = cpu_to_be32(arg->server->s_dev);
1363         *p++ = cpu_to_be32(arg->id.uniquifier);
1364         xdr_encode_hyper(p, arg->id.create_time);
1365 }
1366
1367 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1368 {
1369         __be32 *p;
1370         struct nfs_client *clp;
1371
1372         p = reserve_space(xdr, 4);
1373         switch(arg->open_flags & O_EXCL) {
1374         case 0:
1375                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1376                 encode_attrs(xdr, arg->u.attrs, arg->server);
1377                 break;
1378         default:
1379                 clp = arg->server->nfs_client;
1380                 if (clp->cl_mvops->minor_version > 0) {
1381                         if (nfs4_has_persistent_session(clp)) {
1382                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1383                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1384                         } else {
1385                                 struct iattr dummy;
1386
1387                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1388                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1389                                 dummy.ia_valid = 0;
1390                                 encode_attrs(xdr, &dummy, arg->server);
1391                         }
1392                 } else {
1393                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1394                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1395                 }
1396         }
1397 }
1398
1399 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401         __be32 *p;
1402
1403         p = reserve_space(xdr, 4);
1404         switch (arg->open_flags & O_CREAT) {
1405         case 0:
1406                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1407                 break;
1408         default:
1409                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1410                 encode_createmode(xdr, arg);
1411         }
1412 }
1413
1414 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch (delegation_type) {
1420         case 0:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1422                 break;
1423         case FMODE_READ:
1424                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1425                 break;
1426         case FMODE_WRITE|FMODE_READ:
1427                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1428                 break;
1429         default:
1430                 BUG();
1431         }
1432 }
1433
1434 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1435 {
1436         __be32 *p;
1437
1438         p = reserve_space(xdr, 4);
1439         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1440         encode_string(xdr, name->len, name->name);
1441 }
1442
1443 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1444 {
1445         __be32 *p;
1446
1447         p = reserve_space(xdr, 4);
1448         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1449         encode_delegation_type(xdr, type);
1450 }
1451
1452 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1458         encode_nfs4_stateid(xdr, stateid);
1459         encode_string(xdr, name->len, name->name);
1460 }
1461
1462 static inline void encode_claim_fh(struct xdr_stream *xdr)
1463 {
1464         __be32 *p;
1465
1466         p = reserve_space(xdr, 4);
1467         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1468 }
1469
1470 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 4);
1475         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1476         encode_nfs4_stateid(xdr, stateid);
1477 }
1478
1479 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1480 {
1481         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1482         encode_openhdr(xdr, arg);
1483         encode_opentype(xdr, arg);
1484         switch (arg->claim) {
1485         case NFS4_OPEN_CLAIM_NULL:
1486                 encode_claim_null(xdr, arg->name);
1487                 break;
1488         case NFS4_OPEN_CLAIM_PREVIOUS:
1489                 encode_claim_previous(xdr, arg->u.delegation_type);
1490                 break;
1491         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1492                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1493                 break;
1494         case NFS4_OPEN_CLAIM_FH:
1495                 encode_claim_fh(xdr);
1496                 break;
1497         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1498                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1499                 break;
1500         default:
1501                 BUG();
1502         }
1503 }
1504
1505 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1506 {
1507         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1508         encode_nfs4_stateid(xdr, arg->stateid);
1509         encode_nfs4_seqid(xdr, arg->seqid);
1510 }
1511
1512 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1513 {
1514         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1515         encode_nfs4_stateid(xdr, arg->stateid);
1516         encode_nfs4_seqid(xdr, arg->seqid);
1517         encode_share_access(xdr, arg->fmode);
1518 }
1519
1520 static void
1521 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1522 {
1523         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1524         encode_string(xdr, fh->size, fh->data);
1525 }
1526
1527 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1528 {
1529         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1530 }
1531
1532 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1533 {
1534         __be32 *p;
1535
1536         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1537         encode_nfs4_stateid(xdr, &args->stateid);
1538
1539         p = reserve_space(xdr, 12);
1540         p = xdr_encode_hyper(p, args->offset);
1541         *p = cpu_to_be32(args->count);
1542 }
1543
1544 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1545 {
1546         uint32_t attrs[2] = {
1547                 FATTR4_WORD0_RDATTR_ERROR,
1548                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1549         };
1550         uint32_t dircount = readdir->count >> 1;
1551         __be32 *p, verf[2];
1552
1553         if (readdir->plus) {
1554                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1555                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1556                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1557                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1558                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1559                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1560                 dircount >>= 1;
1561         }
1562         /* Use mounted_on_fileid only if the server supports it */
1563         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1564                 attrs[0] |= FATTR4_WORD0_FILEID;
1565
1566         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1567         encode_uint64(xdr, readdir->cookie);
1568         encode_nfs4_verifier(xdr, &readdir->verifier);
1569         p = reserve_space(xdr, 20);
1570         *p++ = cpu_to_be32(dircount);
1571         *p++ = cpu_to_be32(readdir->count);
1572         *p++ = cpu_to_be32(2);
1573
1574         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1575         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1576         memcpy(verf, readdir->verifier.data, sizeof(verf));
1577         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1578                         __func__,
1579                         (unsigned long long)readdir->cookie,
1580                         verf[0], verf[1],
1581                         attrs[0] & readdir->bitmask[0],
1582                         attrs[1] & readdir->bitmask[1]);
1583 }
1584
1585 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1588 }
1589
1590 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1591 {
1592         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1593         encode_string(xdr, name->len, name->name);
1594 }
1595
1596 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1597 {
1598         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1599         encode_string(xdr, oldname->len, oldname->name);
1600         encode_string(xdr, newname->len, newname->name);
1601 }
1602
1603 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1604                          struct compound_hdr *hdr)
1605 {
1606         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1607         encode_uint64(xdr, clid);
1608 }
1609
1610 static void
1611 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1612 {
1613         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1614 }
1615
1616 static void
1617 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1618 {
1619         __be32 *p;
1620
1621         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1622         encode_nfs4_stateid(xdr, &zero_stateid);
1623         p = reserve_space(xdr, 2*4);
1624         *p++ = cpu_to_be32(1);
1625         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1626         p = reserve_space(xdr, 4);
1627         *p = cpu_to_be32(arg->acl_len);
1628         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1629 }
1630
1631 static void
1632 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1633 {
1634         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1635 }
1636
1637 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1638 {
1639         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1640         encode_nfs4_stateid(xdr, &arg->stateid);
1641         encode_attrs(xdr, arg->iap, server);
1642 }
1643
1644 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1645 {
1646         __be32 *p;
1647
1648         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1649         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1650
1651         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(setclientid->sc_prog);
1654         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1655         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1656         p = reserve_space(xdr, 4);
1657         *p = cpu_to_be32(setclientid->sc_cb_ident);
1658 }
1659
1660 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1663                         decode_setclientid_confirm_maxsz, hdr);
1664         encode_uint64(xdr, arg->clientid);
1665         encode_nfs4_verifier(xdr, &arg->confirm);
1666 }
1667
1668 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1669 {
1670         __be32 *p;
1671
1672         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1673         encode_nfs4_stateid(xdr, &args->stateid);
1674
1675         p = reserve_space(xdr, 16);
1676         p = xdr_encode_hyper(p, args->offset);
1677         *p++ = cpu_to_be32(args->stable);
1678         *p = cpu_to_be32(args->count);
1679
1680         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1681 }
1682
1683 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1684 {
1685         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1686         encode_nfs4_stateid(xdr, stateid);
1687 }
1688
1689 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1690 {
1691         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1692         encode_string(xdr, name->len, name->name);
1693 }
1694
1695 #if defined(CONFIG_NFS_V4_1)
1696 /* NFSv4.1 operations */
1697 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1698                                    struct nfs4_session *session,
1699                                    struct compound_hdr *hdr)
1700 {
1701         __be32 *p;
1702
1703         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1704                 decode_bind_conn_to_session_maxsz, hdr);
1705         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1706         p = xdr_reserve_space(xdr, 8);
1707         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1708         *p = 0; /* use_conn_in_rdma_mode = False */
1709 }
1710
1711 static void encode_exchange_id(struct xdr_stream *xdr,
1712                                struct nfs41_exchange_id_args *args,
1713                                struct compound_hdr *hdr)
1714 {
1715         __be32 *p;
1716         char impl_name[IMPL_NAME_LIMIT];
1717         int len = 0;
1718
1719         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1720         encode_nfs4_verifier(xdr, args->verifier);
1721
1722         encode_string(xdr, args->id_len, args->id);
1723
1724         p = reserve_space(xdr, 12);
1725         *p++ = cpu_to_be32(args->flags);
1726         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1727
1728         if (send_implementation_id &&
1729             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1730             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1731                 <= sizeof(impl_name) + 1)
1732                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1733                                utsname()->sysname, utsname()->release,
1734                                utsname()->version, utsname()->machine);
1735
1736         if (len > 0) {
1737                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1738
1739                 encode_string(xdr,
1740                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1741                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1742                 encode_string(xdr, len, impl_name);
1743                 /* just send zeros for nii_date - the date is in nii_name */
1744                 p = reserve_space(xdr, 12);
1745                 p = xdr_encode_hyper(p, 0);
1746                 *p = cpu_to_be32(0);
1747         } else
1748                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1749 }
1750
1751 static void encode_create_session(struct xdr_stream *xdr,
1752                                   struct nfs41_create_session_args *args,
1753                                   struct compound_hdr *hdr)
1754 {
1755         __be32 *p;
1756         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1757         uint32_t len;
1758         struct nfs_client *clp = args->client;
1759         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1760         u32 max_resp_sz_cached;
1761
1762         /*
1763          * Assumes OPEN is the biggest non-idempotent compound.
1764          * 2 is the verifier.
1765          */
1766         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1767                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1768
1769         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1770                         clp->cl_ipaddr);
1771
1772         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1773         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1774         p = xdr_encode_hyper(p, clp->cl_clientid);
1775         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1776         *p++ = cpu_to_be32(args->flags);                        /*flags */
1777
1778         /* Fore Channel */
1779         *p++ = cpu_to_be32(0);                          /* header padding size */
1780         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1781         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1782         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1783         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1784         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1785         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1786
1787         /* Back Channel */
1788         *p++ = cpu_to_be32(0);                          /* header padding size */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1790         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1791         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1792         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1793         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1794         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1795
1796         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1797         *p++ = cpu_to_be32(1);
1798         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1799
1800         /* authsys_parms rfc1831 */
1801         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1802         p = xdr_encode_opaque(p, machine_name, len);
1803         *p++ = cpu_to_be32(0);                          /* UID */
1804         *p++ = cpu_to_be32(0);                          /* GID */
1805         *p = cpu_to_be32(0);                            /* No more gids */
1806 }
1807
1808 static void encode_destroy_session(struct xdr_stream *xdr,
1809                                    struct nfs4_session *session,
1810                                    struct compound_hdr *hdr)
1811 {
1812         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1813         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1814 }
1815
1816 static void encode_destroy_clientid(struct xdr_stream *xdr,
1817                                    uint64_t clientid,
1818                                    struct compound_hdr *hdr)
1819 {
1820         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1821         encode_uint64(xdr, clientid);
1822 }
1823
1824 static void encode_reclaim_complete(struct xdr_stream *xdr,
1825                                     struct nfs41_reclaim_complete_args *args,
1826                                     struct compound_hdr *hdr)
1827 {
1828         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1829         encode_uint32(xdr, args->one_fs);
1830 }
1831 #endif /* CONFIG_NFS_V4_1 */
1832
1833 static void encode_sequence(struct xdr_stream *xdr,
1834                             const struct nfs4_sequence_args *args,
1835                             struct compound_hdr *hdr)
1836 {
1837 #if defined(CONFIG_NFS_V4_1)
1838         struct nfs4_session *session;
1839         struct nfs4_slot_table *tp;
1840         struct nfs4_slot *slot = args->sa_slot;
1841         __be32 *p;
1842
1843         if (slot == NULL)
1844                 return;
1845
1846         tp = slot->table;
1847         session = tp->session;
1848
1849         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1850
1851         /*
1852          * Sessionid + seqid + slotid + max slotid + cache_this
1853          */
1854         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1855                 "max_slotid=%d cache_this=%d\n",
1856                 __func__,
1857                 ((u32 *)session->sess_id.data)[0],
1858                 ((u32 *)session->sess_id.data)[1],
1859                 ((u32 *)session->sess_id.data)[2],
1860                 ((u32 *)session->sess_id.data)[3],
1861                 slot->seq_nr, slot->slot_nr,
1862                 tp->highest_used_slotid, args->sa_cache_this);
1863         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1864         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865         *p++ = cpu_to_be32(slot->seq_nr);
1866         *p++ = cpu_to_be32(slot->slot_nr);
1867         *p++ = cpu_to_be32(tp->highest_used_slotid);
1868         *p = cpu_to_be32(args->sa_cache_this);
1869 #endif /* CONFIG_NFS_V4_1 */
1870 }
1871
1872 #ifdef CONFIG_NFS_V4_1
1873 static void
1874 encode_getdevicelist(struct xdr_stream *xdr,
1875                      const struct nfs4_getdevicelist_args *args,
1876                      struct compound_hdr *hdr)
1877 {
1878         __be32 *p;
1879         nfs4_verifier dummy = {
1880                 .data = "dummmmmy",
1881         };
1882
1883         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1884         p = reserve_space(xdr, 16);
1885         *p++ = cpu_to_be32(args->layoutclass);
1886         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1887         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1888         encode_nfs4_verifier(xdr, &dummy);
1889 }
1890
1891 static void
1892 encode_getdeviceinfo(struct xdr_stream *xdr,
1893                      const struct nfs4_getdeviceinfo_args *args,
1894                      struct compound_hdr *hdr)
1895 {
1896         __be32 *p;
1897
1898         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1899         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1900         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1901                                     NFS4_DEVICEID4_SIZE);
1902         *p++ = cpu_to_be32(args->pdev->layout_type);
1903         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1904         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1905 }
1906
1907 static void
1908 encode_layoutget(struct xdr_stream *xdr,
1909                       const struct nfs4_layoutget_args *args,
1910                       struct compound_hdr *hdr)
1911 {
1912         __be32 *p;
1913
1914         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1915         p = reserve_space(xdr, 36);
1916         *p++ = cpu_to_be32(0);     /* Signal layout available */
1917         *p++ = cpu_to_be32(args->type);
1918         *p++ = cpu_to_be32(args->range.iomode);
1919         p = xdr_encode_hyper(p, args->range.offset);
1920         p = xdr_encode_hyper(p, args->range.length);
1921         p = xdr_encode_hyper(p, args->minlength);
1922         encode_nfs4_stateid(xdr, &args->stateid);
1923         encode_uint32(xdr, args->maxcount);
1924
1925         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1926                 __func__,
1927                 args->type,
1928                 args->range.iomode,
1929                 (unsigned long)args->range.offset,
1930                 (unsigned long)args->range.length,
1931                 args->maxcount);
1932 }
1933
1934 static int
1935 encode_layoutcommit(struct xdr_stream *xdr,
1936                     struct inode *inode,
1937                     const struct nfs4_layoutcommit_args *args,
1938                     struct compound_hdr *hdr)
1939 {
1940         __be32 *p;
1941
1942         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1943                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1944
1945         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1946         p = reserve_space(xdr, 20);
1947         /* Only whole file layouts */
1948         p = xdr_encode_hyper(p, 0); /* offset */
1949         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1950         *p = cpu_to_be32(0); /* reclaim */
1951         encode_nfs4_stateid(xdr, &args->stateid);
1952         p = reserve_space(xdr, 20);
1953         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1954         p = xdr_encode_hyper(p, args->lastbytewritten);
1955         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1956         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1957
1958         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1959                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1960                         NFS_I(inode)->layout, xdr, args);
1961         else
1962                 encode_uint32(xdr, 0); /* no layout-type payload */
1963
1964         return 0;
1965 }
1966
1967 static void
1968 encode_layoutreturn(struct xdr_stream *xdr,
1969                     const struct nfs4_layoutreturn_args *args,
1970                     struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973
1974         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1975         p = reserve_space(xdr, 16);
1976         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1977         *p++ = cpu_to_be32(args->layout_type);
1978         *p++ = cpu_to_be32(IOMODE_ANY);
1979         *p = cpu_to_be32(RETURN_FILE);
1980         p = reserve_space(xdr, 16);
1981         p = xdr_encode_hyper(p, 0);
1982         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1983         spin_lock(&args->inode->i_lock);
1984         encode_nfs4_stateid(xdr, &args->stateid);
1985         spin_unlock(&args->inode->i_lock);
1986         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1987                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1988                         NFS_I(args->inode)->layout, xdr, args);
1989         } else
1990                 encode_uint32(xdr, 0);
1991 }
1992
1993 static int
1994 encode_secinfo_no_name(struct xdr_stream *xdr,
1995                        const struct nfs41_secinfo_no_name_args *args,
1996                        struct compound_hdr *hdr)
1997 {
1998         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1999         encode_uint32(xdr, args->style);
2000         return 0;
2001 }
2002
2003 static void encode_test_stateid(struct xdr_stream *xdr,
2004                                 struct nfs41_test_stateid_args *args,
2005                                 struct compound_hdr *hdr)
2006 {
2007         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2008         encode_uint32(xdr, 1);
2009         encode_nfs4_stateid(xdr, args->stateid);
2010 }
2011
2012 static void encode_free_stateid(struct xdr_stream *xdr,
2013                                 struct nfs41_free_stateid_args *args,
2014                                 struct compound_hdr *hdr)
2015 {
2016         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2017         encode_nfs4_stateid(xdr, args->stateid);
2018 }
2019 #endif /* CONFIG_NFS_V4_1 */
2020
2021 /*
2022  * END OF "GENERIC" ENCODE ROUTINES.
2023  */
2024
2025 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2026 {
2027 #if defined(CONFIG_NFS_V4_1)
2028
2029         if (args->sa_slot)
2030                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2031 #endif /* CONFIG_NFS_V4_1 */
2032         return 0;
2033 }
2034
2035 /*
2036  * Encode an ACCESS request
2037  */
2038 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2039                                 const struct nfs4_accessargs *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_putfh(xdr, args->fh, &hdr);
2048         encode_access(xdr, args->access, &hdr);
2049         encode_getfattr(xdr, args->bitmask, &hdr);
2050         encode_nops(&hdr);
2051 }
2052
2053 /*
2054  * Encode LOOKUP request
2055  */
2056 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2057                                 const struct nfs4_lookup_arg *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->dir_fh, &hdr);
2066         encode_lookup(xdr, args->name, &hdr);
2067         encode_getfh(xdr, &hdr);
2068         encode_getfattr(xdr, args->bitmask, &hdr);
2069         encode_nops(&hdr);
2070 }
2071
2072 /*
2073  * Encode LOOKUP_ROOT request
2074  */
2075 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2076                                      struct xdr_stream *xdr,
2077                                      const struct nfs4_lookup_root_arg *args)
2078 {
2079         struct compound_hdr hdr = {
2080                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081         };
2082
2083         encode_compound_hdr(xdr, req, &hdr);
2084         encode_sequence(xdr, &args->seq_args, &hdr);
2085         encode_putrootfh(xdr, &hdr);
2086         encode_getfh(xdr, &hdr);
2087         encode_getfattr(xdr, args->bitmask, &hdr);
2088         encode_nops(&hdr);
2089 }
2090
2091 /*
2092  * Encode REMOVE request
2093  */
2094 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2095                                 const struct nfs_removeargs *args)
2096 {
2097         struct compound_hdr hdr = {
2098                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099         };
2100
2101         encode_compound_hdr(xdr, req, &hdr);
2102         encode_sequence(xdr, &args->seq_args, &hdr);
2103         encode_putfh(xdr, args->fh, &hdr);
2104         encode_remove(xdr, &args->name, &hdr);
2105         encode_nops(&hdr);
2106 }
2107
2108 /*
2109  * Encode RENAME request
2110  */
2111 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2112                                 const struct nfs_renameargs *args)
2113 {
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         encode_compound_hdr(xdr, req, &hdr);
2119         encode_sequence(xdr, &args->seq_args, &hdr);
2120         encode_putfh(xdr, args->old_dir, &hdr);
2121         encode_savefh(xdr, &hdr);
2122         encode_putfh(xdr, args->new_dir, &hdr);
2123         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2124         encode_nops(&hdr);
2125 }
2126
2127 /*
2128  * Encode LINK request
2129  */
2130 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2131                              const struct nfs4_link_arg *args)
2132 {
2133         struct compound_hdr hdr = {
2134                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135         };
2136
2137         encode_compound_hdr(xdr, req, &hdr);
2138         encode_sequence(xdr, &args->seq_args, &hdr);
2139         encode_putfh(xdr, args->fh, &hdr);
2140         encode_savefh(xdr, &hdr);
2141         encode_putfh(xdr, args->dir_fh, &hdr);
2142         encode_link(xdr, args->name, &hdr);
2143         encode_restorefh(xdr, &hdr);
2144         encode_getfattr(xdr, args->bitmask, &hdr);
2145         encode_nops(&hdr);
2146 }
2147
2148 /*
2149  * Encode CREATE request
2150  */
2151 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2152                                 const struct nfs4_create_arg *args)
2153 {
2154         struct compound_hdr hdr = {
2155                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156         };
2157
2158         encode_compound_hdr(xdr, req, &hdr);
2159         encode_sequence(xdr, &args->seq_args, &hdr);
2160         encode_putfh(xdr, args->dir_fh, &hdr);
2161         encode_create(xdr, args, &hdr);
2162         encode_getfh(xdr, &hdr);
2163         encode_getfattr(xdr, args->bitmask, &hdr);
2164         encode_nops(&hdr);
2165 }
2166
2167 /*
2168  * Encode SYMLINK request
2169  */
2170 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2171                                  const struct nfs4_create_arg *args)
2172 {
2173         nfs4_xdr_enc_create(req, xdr, args);
2174 }
2175
2176 /*
2177  * Encode GETATTR request
2178  */
2179 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2180                                  const struct nfs4_getattr_arg *args)
2181 {
2182         struct compound_hdr hdr = {
2183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184         };
2185
2186         encode_compound_hdr(xdr, req, &hdr);
2187         encode_sequence(xdr, &args->seq_args, &hdr);
2188         encode_putfh(xdr, args->fh, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_nops(&hdr);
2191 }
2192
2193 /*
2194  * Encode a CLOSE request
2195  */
2196 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2197                                struct nfs_closeargs *args)
2198 {
2199         struct compound_hdr hdr = {
2200                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2201         };
2202
2203         encode_compound_hdr(xdr, req, &hdr);
2204         encode_sequence(xdr, &args->seq_args, &hdr);
2205         encode_putfh(xdr, args->fh, &hdr);
2206         encode_close(xdr, args, &hdr);
2207         encode_getfattr(xdr, args->bitmask, &hdr);
2208         encode_nops(&hdr);
2209 }
2210
2211 /*
2212  * Encode an OPEN request
2213  */
2214 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2215                               struct nfs_openargs *args)
2216 {
2217         struct compound_hdr hdr = {
2218                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219         };
2220
2221         encode_compound_hdr(xdr, req, &hdr);
2222         encode_sequence(xdr, &args->seq_args, &hdr);
2223         encode_putfh(xdr, args->fh, &hdr);
2224         encode_open(xdr, args, &hdr);
2225         encode_getfh(xdr, &hdr);
2226         if (args->access)
2227                 encode_access(xdr, args->access, &hdr);
2228         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2229         encode_nops(&hdr);
2230 }
2231
2232 /*
2233  * Encode an OPEN_CONFIRM request
2234  */
2235 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2236                                       struct xdr_stream *xdr,
2237                                       struct nfs_open_confirmargs *args)
2238 {
2239         struct compound_hdr hdr = {
2240                 .nops   = 0,
2241         };
2242
2243         encode_compound_hdr(xdr, req, &hdr);
2244         encode_putfh(xdr, args->fh, &hdr);
2245         encode_open_confirm(xdr, args, &hdr);
2246         encode_nops(&hdr);
2247 }
2248
2249 /*
2250  * Encode an OPEN request with no attributes.
2251  */
2252 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2253                                      struct xdr_stream *xdr,
2254                                      struct nfs_openargs *args)
2255 {
2256         struct compound_hdr hdr = {
2257                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258         };
2259
2260         encode_compound_hdr(xdr, req, &hdr);
2261         encode_sequence(xdr, &args->seq_args, &hdr);
2262         encode_putfh(xdr, args->fh, &hdr);
2263         encode_open(xdr, args, &hdr);
2264         if (args->access)
2265                 encode_access(xdr, args->access, &hdr);
2266         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2267         encode_nops(&hdr);
2268 }
2269
2270 /*
2271  * Encode an OPEN_DOWNGRADE request
2272  */
2273 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2274                                         struct xdr_stream *xdr,
2275                                         struct nfs_closeargs *args)
2276 {
2277         struct compound_hdr hdr = {
2278                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2279         };
2280
2281         encode_compound_hdr(xdr, req, &hdr);
2282         encode_sequence(xdr, &args->seq_args, &hdr);
2283         encode_putfh(xdr, args->fh, &hdr);
2284         encode_open_downgrade(xdr, args, &hdr);
2285         encode_getfattr(xdr, args->bitmask, &hdr);
2286         encode_nops(&hdr);
2287 }
2288
2289 /*
2290  * Encode a LOCK request
2291  */
2292 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2293                               struct nfs_lock_args *args)
2294 {
2295         struct compound_hdr hdr = {
2296                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2297         };
2298
2299         encode_compound_hdr(xdr, req, &hdr);
2300         encode_sequence(xdr, &args->seq_args, &hdr);
2301         encode_putfh(xdr, args->fh, &hdr);
2302         encode_lock(xdr, args, &hdr);
2303         encode_nops(&hdr);
2304 }
2305
2306 /*
2307  * Encode a LOCKT request
2308  */
2309 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2310                                struct nfs_lockt_args *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_sequence(xdr, &args->seq_args, &hdr);
2318         encode_putfh(xdr, args->fh, &hdr);
2319         encode_lockt(xdr, args, &hdr);
2320         encode_nops(&hdr);
2321 }
2322
2323 /*
2324  * Encode a LOCKU request
2325  */
2326 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2327                                struct nfs_locku_args *args)
2328 {
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_locku(xdr, args, &hdr);
2337         encode_nops(&hdr);
2338 }
2339
2340 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2341                                            struct xdr_stream *xdr,
2342                                         struct nfs_release_lockowner_args *args)
2343 {
2344         struct compound_hdr hdr = {
2345                 .minorversion = 0,
2346         };
2347
2348         encode_compound_hdr(xdr, req, &hdr);
2349         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2350         encode_nops(&hdr);
2351 }
2352
2353 /*
2354  * Encode a READLINK request
2355  */
2356 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2357                                   const struct nfs4_readlink *args)
2358 {
2359         struct compound_hdr hdr = {
2360                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361         };
2362
2363         encode_compound_hdr(xdr, req, &hdr);
2364         encode_sequence(xdr, &args->seq_args, &hdr);
2365         encode_putfh(xdr, args->fh, &hdr);
2366         encode_readlink(xdr, args, req, &hdr);
2367
2368         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2369                         args->pgbase, args->pglen);
2370         encode_nops(&hdr);
2371 }
2372
2373 /*
2374  * Encode a READDIR request
2375  */
2376 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2377                                  const struct nfs4_readdir_arg *args)
2378 {
2379         struct compound_hdr hdr = {
2380                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2381         };
2382
2383         encode_compound_hdr(xdr, req, &hdr);
2384         encode_sequence(xdr, &args->seq_args, &hdr);
2385         encode_putfh(xdr, args->fh, &hdr);
2386         encode_readdir(xdr, args, req, &hdr);
2387
2388         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2389                          args->pgbase, args->count);
2390         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2391                         __func__, hdr.replen << 2, args->pages,
2392                         args->pgbase, args->count);
2393         encode_nops(&hdr);
2394 }
2395
2396 /*
2397  * Encode a READ request
2398  */
2399 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2400                               struct nfs_readargs *args)
2401 {
2402         struct compound_hdr hdr = {
2403                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2404         };
2405
2406         encode_compound_hdr(xdr, req, &hdr);
2407         encode_sequence(xdr, &args->seq_args, &hdr);
2408         encode_putfh(xdr, args->fh, &hdr);
2409         encode_read(xdr, args, &hdr);
2410
2411         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2412                          args->pages, args->pgbase, args->count);
2413         req->rq_rcv_buf.flags |= XDRBUF_READ;
2414         encode_nops(&hdr);
2415 }
2416
2417 /*
2418  * Encode an SETATTR request
2419  */
2420 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2421                                  struct nfs_setattrargs *args)
2422 {
2423         struct compound_hdr hdr = {
2424                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425         };
2426
2427         encode_compound_hdr(xdr, req, &hdr);
2428         encode_sequence(xdr, &args->seq_args, &hdr);
2429         encode_putfh(xdr, args->fh, &hdr);
2430         encode_setattr(xdr, args, args->server, &hdr);
2431         encode_getfattr(xdr, args->bitmask, &hdr);
2432         encode_nops(&hdr);
2433 }
2434
2435 /*
2436  * Encode a GETACL request
2437  */
2438 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2439                                 struct nfs_getaclargs *args)
2440 {
2441         struct compound_hdr hdr = {
2442                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443         };
2444         uint32_t replen;
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_sequence(xdr, &args->seq_args, &hdr);
2448         encode_putfh(xdr, args->fh, &hdr);
2449         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2450         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2451
2452         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2453                 args->acl_pages, args->acl_pgbase, args->acl_len);
2454
2455         encode_nops(&hdr);
2456 }
2457
2458 /*
2459  * Encode a WRITE request
2460  */
2461 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2462                                struct nfs_writeargs *args)
2463 {
2464         struct compound_hdr hdr = {
2465                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2466         };
2467
2468         encode_compound_hdr(xdr, req, &hdr);
2469         encode_sequence(xdr, &args->seq_args, &hdr);
2470         encode_putfh(xdr, args->fh, &hdr);
2471         encode_write(xdr, args, &hdr);
2472         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2473         if (args->bitmask)
2474                 encode_getfattr(xdr, args->bitmask, &hdr);
2475         encode_nops(&hdr);
2476 }
2477
2478 /*
2479  *  a COMMIT request
2480  */
2481 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2482                                 struct nfs_commitargs *args)
2483 {
2484         struct compound_hdr hdr = {
2485                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2486         };
2487
2488         encode_compound_hdr(xdr, req, &hdr);
2489         encode_sequence(xdr, &args->seq_args, &hdr);
2490         encode_putfh(xdr, args->fh, &hdr);
2491         encode_commit(xdr, args, &hdr);
2492         encode_nops(&hdr);
2493 }
2494
2495 /*
2496  * FSINFO request
2497  */
2498 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                 struct nfs4_fsinfo_arg *args)
2500 {
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_fsinfo(xdr, args->bitmask, &hdr);
2509         encode_nops(&hdr);
2510 }
2511
2512 /*
2513  * a PATHCONF request
2514  */
2515 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2516                                   const struct nfs4_pathconf_arg *args)
2517 {
2518         struct compound_hdr hdr = {
2519                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520         };
2521
2522         encode_compound_hdr(xdr, req, &hdr);
2523         encode_sequence(xdr, &args->seq_args, &hdr);
2524         encode_putfh(xdr, args->fh, &hdr);
2525         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2526                            &hdr);
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * a STATFS request
2532  */
2533 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                                 const struct nfs4_statfs_arg *args)
2535 {
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2544                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2545         encode_nops(&hdr);
2546 }
2547
2548 /*
2549  * GETATTR_BITMAP request
2550  */
2551 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2552                                      struct xdr_stream *xdr,
2553                                      struct nfs4_server_caps_arg *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fhandle, &hdr);
2562         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2563                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2564                            FATTR4_WORD0_LINK_SUPPORT|
2565                            FATTR4_WORD0_SYMLINK_SUPPORT|
2566                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * a RENEW request
2572  */
2573 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                struct nfs_client *clp)
2575 {
2576         struct compound_hdr hdr = {
2577                 .nops   = 0,
2578         };
2579
2580         encode_compound_hdr(xdr, req, &hdr);
2581         encode_renew(xdr, clp->cl_clientid, &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * a SETCLIENTID request
2587  */
2588 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2589                                      struct xdr_stream *xdr,
2590                                      struct nfs4_setclientid *sc)
2591 {
2592         struct compound_hdr hdr = {
2593                 .nops   = 0,
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_setclientid(xdr, sc, &hdr);
2598         encode_nops(&hdr);
2599 }
2600
2601 /*
2602  * a SETCLIENTID_CONFIRM request
2603  */
2604 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2605                                              struct xdr_stream *xdr,
2606                                              struct nfs4_setclientid_res *arg)
2607 {
2608         struct compound_hdr hdr = {
2609                 .nops   = 0,
2610         };
2611         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2612
2613         encode_compound_hdr(xdr, req, &hdr);
2614         encode_setclientid_confirm(xdr, arg, &hdr);
2615         encode_putrootfh(xdr, &hdr);
2616         encode_fsinfo(xdr, lease_bitmap, &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  * DELEGRETURN request
2622  */
2623 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2624                                      struct xdr_stream *xdr,
2625                                      const struct nfs4_delegreturnargs *args)
2626 {
2627         struct compound_hdr hdr = {
2628                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_sequence(xdr, &args->seq_args, &hdr);
2633         encode_putfh(xdr, args->fhandle, &hdr);
2634         encode_getfattr(xdr, args->bitmask, &hdr);
2635         encode_delegreturn(xdr, args->stateid, &hdr);
2636         encode_nops(&hdr);
2637 }
2638
2639 /*
2640  * Encode FS_LOCATIONS request
2641  */
2642 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2643                                       struct xdr_stream *xdr,
2644                                       struct nfs4_fs_locations_arg *args)
2645 {
2646         struct compound_hdr hdr = {
2647                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2648         };
2649         uint32_t replen;
2650
2651         encode_compound_hdr(xdr, req, &hdr);
2652         encode_sequence(xdr, &args->seq_args, &hdr);
2653         encode_putfh(xdr, args->dir_fh, &hdr);
2654         encode_lookup(xdr, args->name, &hdr);
2655         replen = hdr.replen;    /* get the attribute into args->page */
2656         encode_fs_locations(xdr, args->bitmask, &hdr);
2657
2658         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2659                         0, PAGE_SIZE);
2660         encode_nops(&hdr);
2661 }
2662
2663 /*
2664  * Encode SECINFO request
2665  */
2666 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2667                                 struct xdr_stream *xdr,
2668                                 struct nfs4_secinfo_arg *args)
2669 {
2670         struct compound_hdr hdr = {
2671                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2672         };
2673
2674         encode_compound_hdr(xdr, req, &hdr);
2675         encode_sequence(xdr, &args->seq_args, &hdr);
2676         encode_putfh(xdr, args->dir_fh, &hdr);
2677         encode_secinfo(xdr, args->name, &hdr);
2678         encode_nops(&hdr);
2679 }
2680
2681 #if defined(CONFIG_NFS_V4_1)
2682 /*
2683  * BIND_CONN_TO_SESSION request
2684  */
2685 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2686                                 struct xdr_stream *xdr,
2687                                 struct nfs_client *clp)
2688 {
2689         struct compound_hdr hdr = {
2690                 .minorversion = clp->cl_mvops->minor_version,
2691         };
2692
2693         encode_compound_hdr(xdr, req, &hdr);
2694         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2695         encode_nops(&hdr);
2696 }
2697
2698 /*
2699  * EXCHANGE_ID request
2700  */
2701 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2702                                      struct xdr_stream *xdr,
2703                                      struct nfs41_exchange_id_args *args)
2704 {
2705         struct compound_hdr hdr = {
2706                 .minorversion = args->client->cl_mvops->minor_version,
2707         };
2708
2709         encode_compound_hdr(xdr, req, &hdr);
2710         encode_exchange_id(xdr, args, &hdr);
2711         encode_nops(&hdr);
2712 }
2713
2714 /*
2715  * a CREATE_SESSION request
2716  */
2717 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2718                                         struct xdr_stream *xdr,
2719                                         struct nfs41_create_session_args *args)
2720 {
2721         struct compound_hdr hdr = {
2722                 .minorversion = args->client->cl_mvops->minor_version,
2723         };
2724
2725         encode_compound_hdr(xdr, req, &hdr);
2726         encode_create_session(xdr, args, &hdr);
2727         encode_nops(&hdr);
2728 }
2729
2730 /*
2731  * a DESTROY_SESSION request
2732  */
2733 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2734                                          struct xdr_stream *xdr,
2735                                          struct nfs4_session *session)
2736 {
2737         struct compound_hdr hdr = {
2738                 .minorversion = session->clp->cl_mvops->minor_version,
2739         };
2740
2741         encode_compound_hdr(xdr, req, &hdr);
2742         encode_destroy_session(xdr, session, &hdr);
2743         encode_nops(&hdr);
2744 }
2745
2746 /*
2747  * a DESTROY_CLIENTID request
2748  */
2749 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2750                                          struct xdr_stream *xdr,
2751                                          struct nfs_client *clp)
2752 {
2753         struct compound_hdr hdr = {
2754                 .minorversion = clp->cl_mvops->minor_version,
2755         };
2756
2757         encode_compound_hdr(xdr, req, &hdr);
2758         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2759         encode_nops(&hdr);
2760 }
2761
2762 /*
2763  * a SEQUENCE request
2764  */
2765 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2766                                   struct nfs4_sequence_args *args)
2767 {
2768         struct compound_hdr hdr = {
2769                 .minorversion = nfs4_xdr_minorversion(args),
2770         };
2771
2772         encode_compound_hdr(xdr, req, &hdr);
2773         encode_sequence(xdr, args, &hdr);
2774         encode_nops(&hdr);
2775 }
2776
2777 /*
2778  * a GET_LEASE_TIME request
2779  */
2780 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2781                                         struct xdr_stream *xdr,
2782                                         struct nfs4_get_lease_time_args *args)
2783 {
2784         struct compound_hdr hdr = {
2785                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2786         };
2787         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2788
2789         encode_compound_hdr(xdr, req, &hdr);
2790         encode_sequence(xdr, &args->la_seq_args, &hdr);
2791         encode_putrootfh(xdr, &hdr);
2792         encode_fsinfo(xdr, lease_bitmap, &hdr);
2793         encode_nops(&hdr);
2794 }
2795
2796 /*
2797  * a RECLAIM_COMPLETE request
2798  */
2799 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2800                                           struct xdr_stream *xdr,
2801                                 struct nfs41_reclaim_complete_args *args)
2802 {
2803         struct compound_hdr hdr = {
2804                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2805         };
2806
2807         encode_compound_hdr(xdr, req, &hdr);
2808         encode_sequence(xdr, &args->seq_args, &hdr);
2809         encode_reclaim_complete(xdr, args, &hdr);
2810         encode_nops(&hdr);
2811 }
2812
2813 /*
2814  * Encode GETDEVICELIST request
2815  */
2816 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2817                                        struct xdr_stream *xdr,
2818                                        struct nfs4_getdevicelist_args *args)
2819 {
2820         struct compound_hdr hdr = {
2821                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2822         };
2823
2824         encode_compound_hdr(xdr, req, &hdr);
2825         encode_sequence(xdr, &args->seq_args, &hdr);
2826         encode_putfh(xdr, args->fh, &hdr);
2827         encode_getdevicelist(xdr, args, &hdr);
2828         encode_nops(&hdr);
2829 }
2830
2831 /*
2832  * Encode GETDEVICEINFO request
2833  */
2834 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2835                                        struct xdr_stream *xdr,
2836                                        struct nfs4_getdeviceinfo_args *args)
2837 {
2838         struct compound_hdr hdr = {
2839                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2840         };
2841
2842         encode_compound_hdr(xdr, req, &hdr);
2843         encode_sequence(xdr, &args->seq_args, &hdr);
2844         encode_getdeviceinfo(xdr, args, &hdr);
2845
2846         /* set up reply kvec. Subtract notification bitmap max size (2)
2847          * so that notification bitmap is put in xdr_buf tail */
2848         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2849                          args->pdev->pages, args->pdev->pgbase,
2850                          args->pdev->pglen);
2851
2852         encode_nops(&hdr);
2853 }
2854
2855 /*
2856  *  Encode LAYOUTGET request
2857  */
2858 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2859                                    struct xdr_stream *xdr,
2860                                    struct nfs4_layoutget_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_putfh(xdr, NFS_FH(args->inode), &hdr);
2869         encode_layoutget(xdr, args, &hdr);
2870
2871         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2872             args->layout.pages, 0, args->layout.pglen);
2873
2874         encode_nops(&hdr);
2875 }
2876
2877 /*
2878  *  Encode LAYOUTCOMMIT request
2879  */
2880 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2881                                       struct xdr_stream *xdr,
2882                                       struct nfs4_layoutcommit_args *args)
2883 {
2884         struct nfs4_layoutcommit_data *data =
2885                 container_of(args, struct nfs4_layoutcommit_data, args);
2886         struct compound_hdr hdr = {
2887                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2888         };
2889
2890         encode_compound_hdr(xdr, req, &hdr);
2891         encode_sequence(xdr, &args->seq_args, &hdr);
2892         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2893         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2894         encode_getfattr(xdr, args->bitmask, &hdr);
2895         encode_nops(&hdr);
2896 }
2897
2898 /*
2899  * Encode LAYOUTRETURN request
2900  */
2901 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2902                                       struct xdr_stream *xdr,
2903                                       struct nfs4_layoutreturn_args *args)
2904 {
2905         struct compound_hdr hdr = {
2906                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2907         };
2908
2909         encode_compound_hdr(xdr, req, &hdr);
2910         encode_sequence(xdr, &args->seq_args, &hdr);
2911         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2912         encode_layoutreturn(xdr, args, &hdr);
2913         encode_nops(&hdr);
2914 }
2915
2916 /*
2917  * Encode SECINFO_NO_NAME request
2918  */
2919 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2920                                         struct xdr_stream *xdr,
2921                                         struct nfs41_secinfo_no_name_args *args)
2922 {
2923         struct compound_hdr hdr = {
2924                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925         };
2926
2927         encode_compound_hdr(xdr, req, &hdr);
2928         encode_sequence(xdr, &args->seq_args, &hdr);
2929         encode_putrootfh(xdr, &hdr);
2930         encode_secinfo_no_name(xdr, args, &hdr);
2931         encode_nops(&hdr);
2932         return 0;
2933 }
2934
2935 /*
2936  *  Encode TEST_STATEID request
2937  */
2938 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2939                                       struct xdr_stream *xdr,
2940                                       struct nfs41_test_stateid_args *args)
2941 {
2942         struct compound_hdr hdr = {
2943                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2944         };
2945
2946         encode_compound_hdr(xdr, req, &hdr);
2947         encode_sequence(xdr, &args->seq_args, &hdr);
2948         encode_test_stateid(xdr, args, &hdr);
2949         encode_nops(&hdr);
2950 }
2951
2952 /*
2953  *  Encode FREE_STATEID request
2954  */
2955 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2956                                      struct xdr_stream *xdr,
2957                                      struct nfs41_free_stateid_args *args)
2958 {
2959         struct compound_hdr hdr = {
2960                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2961         };
2962
2963         encode_compound_hdr(xdr, req, &hdr);
2964         encode_sequence(xdr, &args->seq_args, &hdr);
2965         encode_free_stateid(xdr, args, &hdr);
2966         encode_nops(&hdr);
2967 }
2968 #endif /* CONFIG_NFS_V4_1 */
2969
2970 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2971 {
2972         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2973                 "Remaining buffer length is %tu words.\n",
2974                 func, xdr->end - xdr->p);
2975 }
2976
2977 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2978 {
2979         __be32 *p;
2980
2981         p = xdr_inline_decode(xdr, 4);
2982         if (unlikely(!p))
2983                 goto out_overflow;
2984         *len = be32_to_cpup(p);
2985         p = xdr_inline_decode(xdr, *len);
2986         if (unlikely(!p))
2987                 goto out_overflow;
2988         *string = (char *)p;
2989         return 0;
2990 out_overflow:
2991         print_overflow_msg(__func__, xdr);
2992         return -EIO;
2993 }
2994
2995 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2996 {
2997         __be32 *p;
2998
2999         p = xdr_inline_decode(xdr, 8);
3000         if (unlikely(!p))
3001                 goto out_overflow;
3002         hdr->status = be32_to_cpup(p++);
3003         hdr->taglen = be32_to_cpup(p);
3004
3005         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3006         if (unlikely(!p))
3007                 goto out_overflow;
3008         hdr->tag = (char *)p;
3009         p += XDR_QUADLEN(hdr->taglen);
3010         hdr->nops = be32_to_cpup(p);
3011         if (unlikely(hdr->nops < 1))
3012                 return nfs4_stat_to_errno(hdr->status);
3013         return 0;
3014 out_overflow:
3015         print_overflow_msg(__func__, xdr);
3016         return -EIO;
3017 }
3018
3019 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3020 {
3021         __be32 *p;
3022         uint32_t opnum;
3023         int32_t nfserr;
3024
3025         p = xdr_inline_decode(xdr, 8);
3026         if (unlikely(!p))
3027                 goto out_overflow;
3028         opnum = be32_to_cpup(p++);
3029         if (opnum != expected) {
3030                 dprintk("nfs: Server returned operation"
3031                         " %d but we issued a request for %d\n",
3032                                 opnum, expected);
3033                 return -EIO;
3034         }
3035         nfserr = be32_to_cpup(p);
3036         if (nfserr != NFS_OK)
3037                 return nfs4_stat_to_errno(nfserr);
3038         return 0;
3039 out_overflow:
3040         print_overflow_msg(__func__, xdr);
3041         return -EIO;
3042 }
3043
3044 /* Dummy routine */
3045 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3046 {
3047         __be32 *p;
3048         unsigned int strlen;
3049         char *str;
3050
3051         p = xdr_inline_decode(xdr, 12);
3052         if (likely(p))
3053                 return decode_opaque_inline(xdr, &strlen, &str);
3054         print_overflow_msg(__func__, xdr);
3055         return -EIO;
3056 }
3057
3058 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3059 {
3060         uint32_t bmlen;
3061         __be32 *p;
3062
3063         p = xdr_inline_decode(xdr, 4);
3064         if (unlikely(!p))
3065                 goto out_overflow;
3066         bmlen = be32_to_cpup(p);
3067
3068         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3069         p = xdr_inline_decode(xdr, (bmlen << 2));
3070         if (unlikely(!p))
3071                 goto out_overflow;
3072         if (bmlen > 0) {
3073                 bitmap[0] = be32_to_cpup(p++);
3074                 if (bmlen > 1) {
3075                         bitmap[1] = be32_to_cpup(p++);
3076                         if (bmlen > 2)
3077                                 bitmap[2] = be32_to_cpup(p);
3078                 }
3079         }
3080         return 0;
3081 out_overflow:
3082         print_overflow_msg(__func__, xdr);
3083         return -EIO;
3084 }
3085
3086 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3087 {
3088         __be32 *p;
3089
3090         p = xdr_inline_decode(xdr, 4);
3091         if (unlikely(!p))
3092                 goto out_overflow;
3093         *attrlen = be32_to_cpup(p);
3094         *savep = xdr_stream_pos(xdr);
3095         return 0;
3096 out_overflow:
3097         print_overflow_msg(__func__, xdr);
3098         return -EIO;
3099 }
3100
3101 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3102 {
3103         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3104                 int ret;
3105                 ret = decode_attr_bitmap(xdr, bitmask);
3106                 if (unlikely(ret < 0))
3107                         return ret;
3108                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3109         } else
3110                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3111         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3112                 bitmask[0], bitmask[1], bitmask[2]);
3113         return 0;
3114 }
3115
3116 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3117 {
3118         __be32 *p;
3119         int ret = 0;
3120
3121         *type = 0;
3122         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3123                 return -EIO;
3124         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3125                 p = xdr_inline_decode(xdr, 4);
3126                 if (unlikely(!p))
3127                         goto out_overflow;
3128                 *type = be32_to_cpup(p);
3129                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3130                         dprintk("%s: bad type %d\n", __func__, *type);
3131                         return -EIO;
3132                 }
3133                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3134                 ret = NFS_ATTR_FATTR_TYPE;
3135         }
3136         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3137         return ret;
3138 out_overflow:
3139         print_overflow_msg(__func__, xdr);
3140         return -EIO;
3141 }
3142
3143 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3144                                       uint32_t *bitmap, uint32_t *type)
3145 {
3146         __be32 *p;
3147
3148         *type = 0;
3149         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3150                 return -EIO;
3151         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3152                 p = xdr_inline_decode(xdr, 4);
3153                 if (unlikely(!p))
3154                         goto out_overflow;
3155                 *type = be32_to_cpup(p);
3156                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3157         }
3158         dprintk("%s: expire type=0x%x\n", __func__, *type);
3159         return 0;
3160 out_overflow:
3161         print_overflow_msg(__func__, xdr);
3162         return -EIO;
3163 }
3164
3165 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3166 {
3167         __be32 *p;
3168         int ret = 0;
3169
3170         *change = 0;
3171         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3172                 return -EIO;
3173         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3174                 p = xdr_inline_decode(xdr, 8);
3175                 if (unlikely(!p))
3176                         goto out_overflow;
3177                 xdr_decode_hyper(p, change);
3178                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3179                 ret = NFS_ATTR_FATTR_CHANGE;
3180         }
3181         dprintk("%s: change attribute=%Lu\n", __func__,
3182                         (unsigned long long)*change);
3183         return ret;
3184 out_overflow:
3185         print_overflow_msg(__func__, xdr);
3186         return -EIO;
3187 }
3188
3189 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3190 {
3191         __be32 *p;
3192         int ret = 0;
3193
3194         *size = 0;
3195         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3196                 return -EIO;
3197         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3198                 p = xdr_inline_decode(xdr, 8);
3199                 if (unlikely(!p))
3200                         goto out_overflow;
3201                 xdr_decode_hyper(p, size);
3202                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3203                 ret = NFS_ATTR_FATTR_SIZE;
3204         }
3205         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3206         return ret;
3207 out_overflow:
3208         print_overflow_msg(__func__, xdr);
3209         return -EIO;
3210 }
3211
3212 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3213 {
3214         __be32 *p;
3215
3216         *res = 0;
3217         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3218                 return -EIO;
3219         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3220                 p = xdr_inline_decode(xdr, 4);
3221                 if (unlikely(!p))
3222                         goto out_overflow;
3223                 *res = be32_to_cpup(p);
3224                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3225         }
3226         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3227         return 0;
3228 out_overflow:
3229         print_overflow_msg(__func__, xdr);
3230         return -EIO;
3231 }
3232
3233 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3234 {
3235         __be32 *p;
3236
3237         *res = 0;
3238         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3241                 p = xdr_inline_decode(xdr, 4);
3242                 if (unlikely(!p))
3243                         goto out_overflow;
3244                 *res = be32_to_cpup(p);
3245                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3246         }
3247         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3248         return 0;
3249 out_overflow:
3250         print_overflow_msg(__func__, xdr);
3251         return -EIO;
3252 }
3253
3254 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3255 {
3256         __be32 *p;
3257         int ret = 0;
3258
3259         fsid->major = 0;
3260         fsid->minor = 0;
3261         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3262                 return -EIO;
3263         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3264                 p = xdr_inline_decode(xdr, 16);
3265                 if (unlikely(!p))
3266                         goto out_overflow;
3267                 p = xdr_decode_hyper(p, &fsid->major);
3268                 xdr_decode_hyper(p, &fsid->minor);
3269                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3270                 ret = NFS_ATTR_FATTR_FSID;
3271         }
3272         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3273                         (unsigned long long)fsid->major,
3274                         (unsigned long long)fsid->minor);
3275         return ret;
3276 out_overflow:
3277         print_overflow_msg(__func__, xdr);
3278         return -EIO;
3279 }
3280
3281 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3282 {
3283         __be32 *p;
3284
3285         *res = 60;
3286         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3287                 return -EIO;
3288         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3289                 p = xdr_inline_decode(xdr, 4);
3290                 if (unlikely(!p))
3291                         goto out_overflow;
3292                 *res = be32_to_cpup(p);
3293                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3294         }
3295         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3296         return 0;
3297 out_overflow:
3298         print_overflow_msg(__func__, xdr);
3299         return -EIO;
3300 }
3301
3302 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3303 {
3304         __be32 *p;
3305
3306         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3307                 return -EIO;
3308         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3309                 p = xdr_inline_decode(xdr, 4);
3310                 if (unlikely(!p))
3311                         goto out_overflow;
3312                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3313                 *res = -be32_to_cpup(p);
3314         }
3315         return 0;
3316 out_overflow:
3317         print_overflow_msg(__func__, xdr);
3318         return -EIO;
3319 }
3320
3321 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3322 {
3323         __be32 *p;
3324         int len;
3325
3326         if (fh != NULL)
3327                 memset(fh, 0, sizeof(*fh));
3328
3329         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3330                 return -EIO;
3331         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3332                 p = xdr_inline_decode(xdr, 4);
3333                 if (unlikely(!p))
3334                         goto out_overflow;
3335                 len = be32_to_cpup(p);
3336                 if (len > NFS4_FHSIZE)
3337                         return -EIO;
3338                 p = xdr_inline_decode(xdr, len);
3339                 if (unlikely(!p))
3340                         goto out_overflow;
3341                 if (fh != NULL) {
3342                         memcpy(fh->data, p, len);
3343                         fh->size = len;
3344                 }
3345                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3346         }
3347         return 0;
3348 out_overflow:
3349         print_overflow_msg(__func__, xdr);
3350         return -EIO;
3351 }
3352
3353 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3354 {
3355         __be32 *p;
3356
3357         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3358         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3359                 return -EIO;
3360         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3361                 p = xdr_inline_decode(xdr, 4);
3362                 if (unlikely(!p))
3363                         goto out_overflow;
3364                 *res = be32_to_cpup(p);
3365                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3366         }
3367         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3368         return 0;
3369 out_overflow:
3370         print_overflow_msg(__func__, xdr);
3371         return -EIO;
3372 }
3373
3374 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3375 {
3376         __be32 *p;
3377         int ret = 0;
3378
3379         *fileid = 0;
3380         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3381                 return -EIO;
3382         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3383                 p = xdr_inline_decode(xdr, 8);
3384                 if (unlikely(!p))
3385                         goto out_overflow;
3386                 xdr_decode_hyper(p, fileid);
3387                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3388                 ret = NFS_ATTR_FATTR_FILEID;
3389         }
3390         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3391         return ret;
3392 out_overflow:
3393         print_overflow_msg(__func__, xdr);
3394         return -EIO;
3395 }
3396
3397 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3398 {
3399         __be32 *p;
3400         int ret = 0;
3401
3402         *fileid = 0;
3403         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3404                 return -EIO;
3405         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3406                 p = xdr_inline_decode(xdr, 8);
3407                 if (unlikely(!p))
3408                         goto out_overflow;
3409                 xdr_decode_hyper(p, fileid);
3410                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3411                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3412         }
3413         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3414         return ret;
3415 out_overflow:
3416         print_overflow_msg(__func__, xdr);
3417         return -EIO;
3418 }
3419
3420 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3421 {
3422         __be32 *p;
3423         int status = 0;
3424
3425         *res = 0;
3426         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3427                 return -EIO;
3428         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3429                 p = xdr_inline_decode(xdr, 8);
3430                 if (unlikely(!p))
3431                         goto out_overflow;
3432                 xdr_decode_hyper(p, res);
3433                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3434         }
3435         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3436         return status;
3437 out_overflow:
3438         print_overflow_msg(__func__, xdr);
3439         return -EIO;
3440 }
3441
3442 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3443 {
3444         __be32 *p;
3445         int status = 0;
3446
3447         *res = 0;
3448         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3449                 return -EIO;
3450         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3451                 p = xdr_inline_decode(xdr, 8);
3452                 if (unlikely(!p))
3453                         goto out_overflow;
3454                 xdr_decode_hyper(p, res);
3455                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3456         }
3457         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3458         return status;
3459 out_overflow:
3460         print_overflow_msg(__func__, xdr);
3461         return -EIO;
3462 }
3463
3464 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3465 {
3466         __be32 *p;
3467         int status = 0;
3468
3469         *res = 0;
3470         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3471                 return -EIO;
3472         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3473                 p = xdr_inline_decode(xdr, 8);
3474                 if (unlikely(!p))
3475                         goto out_overflow;
3476                 xdr_decode_hyper(p, res);
3477                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3478         }
3479         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3480         return status;
3481 out_overflow:
3482         print_overflow_msg(__func__, xdr);
3483         return -EIO;
3484 }
3485
3486 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3487 {
3488         u32 n;
3489         __be32 *p;
3490         int status = 0;
3491
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 root_path;
3498         dprintk("pathname4: ");
3499         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3500                 dprintk("cannot parse %d components in path\n", n);
3501                 goto out_eio;
3502         }
3503         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3504                 struct nfs4_string *component = &path->components[path->ncomponents];
3505                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3506                 if (unlikely(status != 0))
3507                         goto out_eio;
3508                 ifdebug (XDR)
3509                         pr_cont("%s%.*s ",
3510                                 (path->ncomponents != n ? "/ " : ""),
3511                                 component->len, component->data);
3512         }
3513 out:
3514         return status;
3515 root_path:
3516 /* a root pathname is sent as a zero component4 */
3517         path->ncomponents = 1;
3518         path->components[0].len=0;
3519         path->components[0].data=NULL;
3520         dprintk("pathname4: /\n");
3521         goto out;
3522 out_eio:
3523         dprintk(" status %d", status);
3524         status = -EIO;
3525         goto out;
3526 out_overflow:
3527         print_overflow_msg(__func__, xdr);
3528         return -EIO;
3529 }
3530
3531 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3532 {
3533         int n;
3534         __be32 *p;
3535         int status = -EIO;
3536
3537         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3538                 goto out;
3539         status = 0;
3540         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3541                 goto out;
3542         status = -EIO;
3543         /* Ignore borken servers that return unrequested attrs */
3544         if (unlikely(res == NULL))
3545                 goto out;
3546         dprintk("%s: fsroot:\n", __func__);
3547         status = decode_pathname(xdr, &res->fs_path);
3548         if (unlikely(status != 0))
3549                 goto out;
3550         p = xdr_inline_decode(xdr, 4);
3551         if (unlikely(!p))
3552                 goto out_overflow;
3553         n = be32_to_cpup(p);
3554         if (n <= 0)
3555                 goto out_eio;
3556         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3557                 u32 m;
3558                 struct nfs4_fs_location *loc;
3559
3560                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3561                         break;
3562                 loc = &res->locations[res->nlocations];
3563                 p = xdr_inline_decode(xdr, 4);
3564                 if (unlikely(!p))
3565                         goto out_overflow;
3566                 m = be32_to_cpup(p);
3567
3568                 dprintk("%s: servers:\n", __func__);
3569                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3570                         struct nfs4_string *server;
3571
3572                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3573                                 unsigned int i;
3574                                 dprintk("%s: using first %u of %u servers "
3575                                         "returned for location %u\n",
3576                                                 __func__,
3577                                                 NFS4_FS_LOCATION_MAXSERVERS,
3578                                                 m, res->nlocations);
3579                                 for (i = loc->nservers; i < m; i++) {
3580                                         unsigned int len;
3581                                         char *data;
3582                                         status = decode_opaque_inline(xdr, &len, &data);
3583                                         if (unlikely(status != 0))
3584                                                 goto out_eio;
3585                                 }
3586                                 break;
3587                         }
3588                         server = &loc->servers[loc->nservers];
3589                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3590                         if (unlikely(status != 0))
3591                                 goto out_eio;
3592                         dprintk("%s ", server->data);
3593                 }
3594                 status = decode_pathname(xdr, &loc->rootpath);
3595                 if (unlikely(status != 0))
3596                         goto out_eio;
3597         }
3598         if (res->nlocations != 0)
3599                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3600 out:
3601         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3602         return status;
3603 out_overflow:
3604         print_overflow_msg(__func__, xdr);
3605 out_eio:
3606         status = -EIO;
3607         goto out;
3608 }
3609
3610 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3611 {
3612         __be32 *p;
3613         int status = 0;
3614
3615         *res = 0;
3616         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3617                 return -EIO;
3618         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3619                 p = xdr_inline_decode(xdr, 8);
3620                 if (unlikely(!p))
3621                         goto out_overflow;
3622                 xdr_decode_hyper(p, res);
3623                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3624         }
3625         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3626         return status;
3627 out_overflow:
3628         print_overflow_msg(__func__, xdr);
3629         return -EIO;
3630 }
3631
3632 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3633 {
3634         __be32 *p;
3635         int status = 0;
3636
3637         *maxlink = 1;
3638         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3639                 return -EIO;
3640         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3641                 p = xdr_inline_decode(xdr, 4);
3642                 if (unlikely(!p))
3643                         goto out_overflow;
3644                 *maxlink = be32_to_cpup(p);
3645                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3646         }
3647         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3648         return status;
3649 out_overflow:
3650         print_overflow_msg(__func__, xdr);
3651         return -EIO;
3652 }
3653
3654 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3655 {
3656         __be32 *p;
3657         int status = 0;
3658
3659         *maxname = 1024;
3660         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3661                 return -EIO;
3662         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3663                 p = xdr_inline_decode(xdr, 4);
3664                 if (unlikely(!p))
3665                         goto out_overflow;
3666                 *maxname = be32_to_cpup(p);
3667                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3668         }
3669         dprintk("%s: maxname=%u\n", __func__, *maxname);
3670         return status;
3671 out_overflow:
3672         print_overflow_msg(__func__, xdr);
3673         return -EIO;
3674 }
3675
3676 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3677 {
3678         __be32 *p;
3679         int status = 0;
3680
3681         *res = 1024;
3682         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3683                 return -EIO;
3684         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3685                 uint64_t maxread;
3686                 p = xdr_inline_decode(xdr, 8);
3687                 if (unlikely(!p))
3688                         goto out_overflow;
3689                 xdr_decode_hyper(p, &maxread);
3690                 if (maxread > 0x7FFFFFFF)
3691                         maxread = 0x7FFFFFFF;
3692                 *res = (uint32_t)maxread;
3693                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3694         }
3695         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3696         return status;
3697 out_overflow:
3698         print_overflow_msg(__func__, xdr);
3699         return -EIO;
3700 }
3701
3702 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3703 {
3704         __be32 *p;
3705         int status = 0;
3706
3707         *res = 1024;
3708         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3709                 return -EIO;
3710         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3711                 uint64_t maxwrite;
3712                 p = xdr_inline_decode(xdr, 8);
3713                 if (unlikely(!p))
3714                         goto out_overflow;
3715                 xdr_decode_hyper(p, &maxwrite);
3716                 if (maxwrite > 0x7FFFFFFF)
3717                         maxwrite = 0x7FFFFFFF;
3718                 *res = (uint32_t)maxwrite;
3719                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3720         }
3721         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3722         return status;
3723 out_overflow:
3724         print_overflow_msg(__func__, xdr);
3725         return -EIO;
3726 }
3727
3728 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3729 {
3730         uint32_t tmp;
3731         __be32 *p;
3732         int ret = 0;
3733
3734         *mode = 0;
3735         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3736                 return -EIO;
3737         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3738                 p = xdr_inline_decode(xdr, 4);
3739                 if (unlikely(!p))
3740                         goto out_overflow;
3741                 tmp = be32_to_cpup(p);
3742                 *mode = tmp & ~S_IFMT;
3743                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3744                 ret = NFS_ATTR_FATTR_MODE;
3745         }
3746         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3747         return ret;
3748 out_overflow:
3749         print_overflow_msg(__func__, xdr);
3750         return -EIO;
3751 }
3752
3753 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3754 {
3755         __be32 *p;
3756         int ret = 0;
3757
3758         *nlink = 1;
3759         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3760                 return -EIO;
3761         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3762                 p = xdr_inline_decode(xdr, 4);
3763                 if (unlikely(!p))
3764                         goto out_overflow;
3765                 *nlink = be32_to_cpup(p);
3766                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3767                 ret = NFS_ATTR_FATTR_NLINK;
3768         }
3769         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3770         return ret;
3771 out_overflow:
3772         print_overflow_msg(__func__, xdr);
3773         return -EIO;
3774 }
3775
3776 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3777                 const struct nfs_server *server, kuid_t *uid,
3778                 struct nfs4_string *owner_name)
3779 {
3780         uint32_t len;
3781         __be32 *p;
3782         int ret = 0;
3783
3784         *uid = make_kuid(&init_user_ns, -2);
3785         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3786                 return -EIO;
3787         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3788                 p = xdr_inline_decode(xdr, 4);
3789                 if (unlikely(!p))
3790                         goto out_overflow;
3791                 len = be32_to_cpup(p);
3792                 p = xdr_inline_decode(xdr, len);
3793                 if (unlikely(!p))
3794                         goto out_overflow;
3795                 if (owner_name != NULL) {
3796                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3797                         if (owner_name->data != NULL) {
3798                                 owner_name->len = len;
3799                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3800                         }
3801                 } else if (len < XDR_MAX_NETOBJ) {
3802                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3803                                 ret = NFS_ATTR_FATTR_OWNER;
3804                         else
3805                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3806                                                 __func__);
3807                 } else
3808                         dprintk("%s: name too long (%u)!\n",
3809                                         __func__, len);
3810                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3811         }
3812         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3813         return ret;
3814 out_overflow:
3815         print_overflow_msg(__func__, xdr);
3816         return -EIO;
3817 }
3818
3819 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3820                 const struct nfs_server *server, kgid_t *gid,
3821                 struct nfs4_string *group_name)
3822 {
3823         uint32_t len;
3824         __be32 *p;
3825         int ret = 0;
3826
3827         *gid = make_kgid(&init_user_ns, -2);
3828         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3829                 return -EIO;
3830         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3831                 p = xdr_inline_decode(xdr, 4);
3832                 if (unlikely(!p))
3833                         goto out_overflow;
3834                 len = be32_to_cpup(p);
3835                 p = xdr_inline_decode(xdr, len);
3836                 if (unlikely(!p))
3837                         goto out_overflow;
3838                 if (group_name != NULL) {
3839                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3840                         if (group_name->data != NULL) {
3841                                 group_name->len = len;
3842                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3843                         }
3844                 } else if (len < XDR_MAX_NETOBJ) {
3845                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3846                                 ret = NFS_ATTR_FATTR_GROUP;
3847                         else
3848                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3849                                                 __func__);
3850                 } else
3851                         dprintk("%s: name too long (%u)!\n",
3852                                         __func__, len);
3853                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3854         }
3855         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3856         return ret;
3857 out_overflow:
3858         print_overflow_msg(__func__, xdr);
3859         return -EIO;
3860 }
3861
3862 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3863 {
3864         uint32_t major = 0, minor = 0;
3865         __be32 *p;
3866         int ret = 0;
3867
3868         *rdev = MKDEV(0,0);
3869         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3870                 return -EIO;
3871         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3872                 dev_t tmp;
3873
3874                 p = xdr_inline_decode(xdr, 8);
3875                 if (unlikely(!p))
3876                         goto out_overflow;
3877                 major = be32_to_cpup(p++);
3878                 minor = be32_to_cpup(p);
3879                 tmp = MKDEV(major, minor);
3880                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3881                         *rdev = tmp;
3882                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3883                 ret = NFS_ATTR_FATTR_RDEV;
3884         }
3885         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3886         return ret;
3887 out_overflow:
3888         print_overflow_msg(__func__, xdr);
3889         return -EIO;
3890 }
3891
3892 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3893 {
3894         __be32 *p;
3895         int status = 0;
3896
3897         *res = 0;
3898         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3899                 return -EIO;
3900         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3901                 p = xdr_inline_decode(xdr, 8);
3902                 if (unlikely(!p))
3903                         goto out_overflow;
3904                 xdr_decode_hyper(p, res);
3905                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3906         }
3907         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3908         return status;
3909 out_overflow:
3910         print_overflow_msg(__func__, xdr);
3911         return -EIO;
3912 }
3913
3914 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3915 {
3916         __be32 *p;
3917         int status = 0;
3918
3919         *res = 0;
3920         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3921                 return -EIO;
3922         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3923                 p = xdr_inline_decode(xdr, 8);
3924                 if (unlikely(!p))
3925                         goto out_overflow;
3926                 xdr_decode_hyper(p, res);
3927                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3928         }
3929         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3930         return status;
3931 out_overflow:
3932         print_overflow_msg(__func__, xdr);
3933         return -EIO;
3934 }
3935
3936 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3937 {
3938         __be32 *p;
3939         int status = 0;
3940
3941         *res = 0;
3942         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3943                 return -EIO;
3944         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3945                 p = xdr_inline_decode(xdr, 8);
3946                 if (unlikely(!p))
3947                         goto out_overflow;
3948                 xdr_decode_hyper(p, res);
3949                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3950         }
3951         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3952         return status;
3953 out_overflow:
3954         print_overflow_msg(__func__, xdr);
3955         return -EIO;
3956 }
3957
3958 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3959 {
3960         __be32 *p;
3961         int ret = 0;
3962
3963         *used = 0;
3964         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3965                 return -EIO;
3966         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3967                 p = xdr_inline_decode(xdr, 8);
3968                 if (unlikely(!p))
3969                         goto out_overflow;
3970                 xdr_decode_hyper(p, used);
3971                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3972                 ret = NFS_ATTR_FATTR_SPACE_USED;
3973         }
3974         dprintk("%s: space used=%Lu\n", __func__,
3975                         (unsigned long long)*used);
3976         return ret;
3977 out_overflow:
3978         print_overflow_msg(__func__, xdr);
3979         return -EIO;
3980 }
3981
3982 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3983 {
3984         __be32 *p;
3985         uint64_t sec;
3986         uint32_t nsec;
3987
3988         p = xdr_inline_decode(xdr, 12);
3989         if (unlikely(!p))
3990                 goto out_overflow;
3991         p = xdr_decode_hyper(p, &sec);
3992         nsec = be32_to_cpup(p);
3993         time->tv_sec = (time_t)sec;
3994         time->tv_nsec = (long)nsec;
3995         return 0;
3996 out_overflow:
3997         print_overflow_msg(__func__, xdr);
3998         return -EIO;
3999 }
4000
4001 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4002 {
4003         int status = 0;
4004
4005         time->tv_sec = 0;
4006         time->tv_nsec = 0;
4007         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4008                 return -EIO;
4009         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4010                 status = decode_attr_time(xdr, time);
4011                 if (status == 0)
4012                         status = NFS_ATTR_FATTR_ATIME;
4013                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4014         }
4015         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4016         return status;
4017 }
4018
4019 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4020 {
4021         int status = 0;
4022
4023         time->tv_sec = 0;
4024         time->tv_nsec = 0;
4025         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4026                 return -EIO;
4027         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4028                 status = decode_attr_time(xdr, time);
4029                 if (status == 0)
4030                         status = NFS_ATTR_FATTR_CTIME;
4031                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4032         }
4033         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4034         return status;
4035 }
4036
4037 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4038                                   struct timespec *time)
4039 {
4040         int status = 0;
4041
4042         time->tv_sec = 0;
4043         time->tv_nsec = 0;
4044         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4045                 return -EIO;
4046         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4047                 status = decode_attr_time(xdr, time);
4048                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4049         }
4050         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4051                 (long)time->tv_nsec);
4052         return status;
4053 }
4054
4055 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4056 {
4057         int status = 0;
4058
4059         time->tv_sec = 0;
4060         time->tv_nsec = 0;
4061         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4062                 return -EIO;
4063         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4064                 status = decode_attr_time(xdr, time);
4065                 if (status == 0)
4066                         status = NFS_ATTR_FATTR_MTIME;
4067                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4068         }
4069         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4070         return status;
4071 }
4072
4073 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4074 {
4075         unsigned int attrwords = XDR_QUADLEN(attrlen);
4076         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4077
4078         if (unlikely(attrwords != nwords)) {
4079                 dprintk("%s: server returned incorrect attribute length: "
4080                         "%u %c %u\n",
4081                                 __func__,
4082                                 attrwords << 2,
4083                                 (attrwords < nwords) ? '<' : '>',
4084                                 nwords << 2);
4085                 return -EIO;
4086         }
4087         return 0;
4088 }
4089
4090 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4091 {
4092         __be32 *p;
4093
4094         p = xdr_inline_decode(xdr, 20);
4095         if (unlikely(!p))
4096                 goto out_overflow;
4097         cinfo->atomic = be32_to_cpup(p++);
4098         p = xdr_decode_hyper(p, &cinfo->before);
4099         xdr_decode_hyper(p, &cinfo->after);
4100         return 0;
4101 out_overflow:
4102         print_overflow_msg(__func__, xdr);
4103         return -EIO;
4104 }
4105
4106 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4107 {
4108         __be32 *p;
4109         uint32_t supp, acc;
4110         int status;
4111
4112         status = decode_op_hdr(xdr, OP_ACCESS);
4113         if (status)
4114                 return status;
4115         p = xdr_inline_decode(xdr, 8);
4116         if (unlikely(!p))
4117                 goto out_overflow;
4118         supp = be32_to_cpup(p++);
4119         acc = be32_to_cpup(p);
4120         *supported = supp;
4121         *access = acc;
4122         return 0;
4123 out_overflow:
4124         print_overflow_msg(__func__, xdr);
4125         return -EIO;
4126 }
4127
4128 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4129 {
4130         __be32 *p;
4131
4132         p = xdr_inline_decode(xdr, len);
4133         if (likely(p)) {
4134                 memcpy(buf, p, len);
4135                 return 0;
4136         }
4137         print_overflow_msg(__func__, xdr);
4138         return -EIO;
4139 }
4140
4141 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4142 {
4143         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4144 }
4145
4146 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4147 {
4148         int status;
4149
4150         status = decode_op_hdr(xdr, OP_CLOSE);
4151         if (status != -EIO)
4152                 nfs_increment_open_seqid(status, res->seqid);
4153         if (!status)
4154                 status = decode_stateid(xdr, &res->stateid);
4155         return status;
4156 }
4157
4158 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4159 {
4160         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4161 }
4162
4163 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4164 {
4165         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4166 }
4167
4168 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4169 {
4170         int status;
4171
4172         status = decode_op_hdr(xdr, OP_COMMIT);
4173         if (!status)
4174                 status = decode_write_verifier(xdr, &res->verf->verifier);
4175         return status;
4176 }
4177
4178 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4179 {
4180         __be32 *p;
4181         uint32_t bmlen;
4182         int status;
4183
4184         status = decode_op_hdr(xdr, OP_CREATE);
4185         if (status)
4186                 return status;
4187         if ((status = decode_change_info(xdr, cinfo)))
4188                 return status;
4189         p = xdr_inline_decode(xdr, 4);
4190         if (unlikely(!p))
4191                 goto out_overflow;
4192         bmlen = be32_to_cpup(p);
4193         p = xdr_inline_decode(xdr, bmlen << 2);
4194         if (likely(p))
4195                 return 0;
4196 out_overflow:
4197         print_overflow_msg(__func__, xdr);
4198         return -EIO;
4199 }
4200
4201 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4202 {
4203         unsigned int savep;
4204         uint32_t attrlen, bitmap[3] = {0};
4205         int status;
4206
4207         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4208                 goto xdr_error;
4209         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4216                                                  &res->fh_expire_type)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4219                 goto xdr_error;
4220         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4221                 goto xdr_error;
4222         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4223                 goto xdr_error;
4224         status = verify_attr_len(xdr, savep, attrlen);
4225 xdr_error:
4226         dprintk("%s: xdr returned %d!\n", __func__, -status);
4227         return status;
4228 }
4229
4230 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4231 {
4232         unsigned int savep;
4233         uint32_t attrlen, bitmap[3] = {0};
4234         int status;
4235
4236         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4239                 goto xdr_error;
4240         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4241                 goto xdr_error;
4242
4243         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4252                 goto xdr_error;
4253         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4254                 goto xdr_error;
4255
4256         status = verify_attr_len(xdr, savep, attrlen);
4257 xdr_error:
4258         dprintk("%s: xdr returned %d!\n", __func__, -status);
4259         return status;
4260 }
4261
4262 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4263 {
4264         unsigned int savep;
4265         uint32_t attrlen, bitmap[3] = {0};
4266         int status;
4267
4268         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4271                 goto xdr_error;
4272         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4273                 goto xdr_error;
4274
4275         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4276                 goto xdr_error;
4277         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4278                 goto xdr_error;
4279
4280         status = verify_attr_len(xdr, savep, attrlen);
4281 xdr_error:
4282         dprintk("%s: xdr returned %d!\n", __func__, -status);
4283         return status;
4284 }
4285
4286 static int decode_threshold_hint(struct xdr_stream *xdr,
4287                                   uint32_t *bitmap,
4288                                   uint64_t *res,
4289                                   uint32_t hint_bit)
4290 {
4291         __be32 *p;
4292
4293         *res = 0;
4294         if (likely(bitmap[0] & hint_bit)) {
4295                 p = xdr_inline_decode(xdr, 8);
4296                 if (unlikely(!p))
4297                         goto out_overflow;
4298                 xdr_decode_hyper(p, res);
4299         }
4300         return 0;
4301 out_overflow:
4302         print_overflow_msg(__func__, xdr);
4303         return -EIO;
4304 }
4305
4306 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4307                                         struct nfs4_threshold *res)
4308 {
4309         __be32 *p;
4310         unsigned int savep;
4311         uint32_t bitmap[3] = {0,}, attrlen;
4312         int status;
4313
4314         /* layout type */
4315         p = xdr_inline_decode(xdr, 4);
4316         if (unlikely(!p)) {
4317                 print_overflow_msg(__func__, xdr);
4318                 return -EIO;
4319         }
4320         res->l_type = be32_to_cpup(p);
4321
4322         /* thi_hintset bitmap */
4323         status = decode_attr_bitmap(xdr, bitmap);
4324         if (status < 0)
4325                 goto xdr_error;
4326
4327         /* thi_hintlist length */
4328         status = decode_attr_length(xdr, &attrlen, &savep);
4329         if (status < 0)
4330                 goto xdr_error;
4331         /* thi_hintlist */
4332         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4333         if (status < 0)
4334                 goto xdr_error;
4335         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4336         if (status < 0)
4337                 goto xdr_error;
4338         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4339                                        THRESHOLD_RD_IO);
4340         if (status < 0)
4341                 goto xdr_error;
4342         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4343                                        THRESHOLD_WR_IO);
4344         if (status < 0)
4345                 goto xdr_error;
4346
4347         status = verify_attr_len(xdr, savep, attrlen);
4348         res->bm = bitmap[0];
4349
4350         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4351                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4352                 res->wr_io_sz);
4353 xdr_error:
4354         dprintk("%s ret=%d!\n", __func__, status);
4355         return status;
4356 }
4357
4358 /*
4359  * Thresholds on pNFS direct I/O vrs MDS I/O
4360  */
4361 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4362                                     uint32_t *bitmap,
4363                                     struct nfs4_threshold *res)
4364 {
4365         __be32 *p;
4366         int status = 0;
4367         uint32_t num;
4368
4369         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4370                 return -EIO;
4371         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4372                 /* Did the server return an unrequested attribute? */
4373                 if (unlikely(res == NULL))
4374                         return -EREMOTEIO;
4375                 p = xdr_inline_decode(xdr, 4);
4376                 if (unlikely(!p))
4377                         goto out_overflow;
4378                 num = be32_to_cpup(p);
4379                 if (num == 0)
4380                         return 0;
4381                 if (num > 1)
4382                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4383                                 "drivers per filesystem not supported\n",
4384                                 __func__);
4385
4386                 status = decode_first_threshold_item4(xdr, res);
4387                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4388         }
4389         return status;
4390 out_overflow:
4391         print_overflow_msg(__func__, xdr);
4392         return -EIO;
4393 }
4394
4395 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4396                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4397                 struct nfs4_fs_locations *fs_loc,
4398                 const struct nfs_server *server)
4399 {
4400         int status;
4401         umode_t fmode = 0;
4402         uint32_t type;
4403         int32_t err;
4404
4405         status = decode_attr_type(xdr, bitmap, &type);
4406         if (status < 0)
4407                 goto xdr_error;
4408         fattr->mode = 0;
4409         if (status != 0) {
4410                 fattr->mode |= nfs_type2fmt[type];
4411                 fattr->valid |= status;
4412         }
4413
4414         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4415         if (status < 0)
4416                 goto xdr_error;
4417         fattr->valid |= status;
4418
4419         status = decode_attr_size(xdr, bitmap, &fattr->size);
4420         if (status < 0)
4421                 goto xdr_error;
4422         fattr->valid |= status;
4423
4424         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4425         if (status < 0)
4426                 goto xdr_error;
4427         fattr->valid |= status;
4428
4429         err = 0;
4430         status = decode_attr_error(xdr, bitmap, &err);
4431         if (status < 0)
4432                 goto xdr_error;
4433
4434         status = decode_attr_filehandle(xdr, bitmap, fh);
4435         if (status < 0)
4436                 goto xdr_error;
4437
4438         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4439         if (status < 0)
4440                 goto xdr_error;
4441         fattr->valid |= status;
4442
4443         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4444         if (status < 0)
4445                 goto xdr_error;
4446         fattr->valid |= status;
4447
4448         status = decode_attr_mode(xdr, bitmap, &fmode);
4449         if (status < 0)
4450                 goto xdr_error;
4451         if (status != 0) {
4452                 fattr->mode |= fmode;
4453                 fattr->valid |= status;
4454         }
4455
4456         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4457         if (status < 0)
4458                 goto xdr_error;
4459         fattr->valid |= status;
4460
4461         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4462         if (status < 0)
4463                 goto xdr_error;
4464         fattr->valid |= status;
4465
4466         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4467         if (status < 0)
4468                 goto xdr_error;
4469         fattr->valid |= status;
4470
4471         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4472         if (status < 0)
4473                 goto xdr_error;
4474         fattr->valid |= status;
4475
4476         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4477         if (status < 0)
4478                 goto xdr_error;
4479         fattr->valid |= status;
4480
4481         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4482         if (status < 0)
4483                 goto xdr_error;
4484         fattr->valid |= status;
4485
4486         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4487         if (status < 0)
4488                 goto xdr_error;
4489         fattr->valid |= status;
4490
4491         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4492         if (status < 0)
4493                 goto xdr_error;
4494         fattr->valid |= status;
4495
4496         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4497         if (status < 0)
4498                 goto xdr_error;
4499         fattr->valid |= status;
4500
4501         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4502         if (status < 0)
4503                 goto xdr_error;
4504
4505 xdr_error:
4506         dprintk("%s: xdr returned %d\n", __func__, -status);
4507         return status;
4508 }
4509
4510 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4511                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4512                 const struct nfs_server *server)
4513 {
4514         unsigned int savep;
4515         uint32_t attrlen,
4516                  bitmap[3] = {0};
4517         int status;
4518
4519         status = decode_op_hdr(xdr, OP_GETATTR);
4520         if (status < 0)
4521                 goto xdr_error;
4522
4523         status = decode_attr_bitmap(xdr, bitmap);
4524         if (status < 0)
4525                 goto xdr_error;
4526
4527         status = decode_attr_length(xdr, &attrlen, &savep);
4528         if (status < 0)
4529                 goto xdr_error;
4530
4531         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4532         if (status < 0)
4533                 goto xdr_error;
4534
4535         status = verify_attr_len(xdr, savep, attrlen);
4536 xdr_error:
4537         dprintk("%s: xdr returned %d\n", __func__, -status);
4538         return status;
4539 }
4540
4541 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4542                 const struct nfs_server *server)
4543 {
4544         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4545 }
4546
4547 /*
4548  * Decode potentially multiple layout types. Currently we only support
4549  * one layout driver per file system.
4550  */
4551 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4552                                          uint32_t *layouttype)
4553 {
4554         uint32_t *p;
4555         int num;
4556
4557         p = xdr_inline_decode(xdr, 4);
4558         if (unlikely(!p))
4559                 goto out_overflow;
4560         num = be32_to_cpup(p);
4561
4562         /* pNFS is not supported by the underlying file system */
4563         if (num == 0) {
4564                 *layouttype = 0;
4565                 return 0;
4566         }
4567         if (num > 1)
4568                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4569                         "drivers per filesystem not supported\n", __func__);
4570
4571         /* Decode and set first layout type, move xdr->p past unused types */
4572         p = xdr_inline_decode(xdr, num * 4);
4573         if (unlikely(!p))
4574                 goto out_overflow;
4575         *layouttype = be32_to_cpup(p);
4576         return 0;
4577 out_overflow:
4578         print_overflow_msg(__func__, xdr);
4579         return -EIO;
4580 }
4581
4582 /*
4583  * The type of file system exported.
4584  * Note we must ensure that layouttype is set in any non-error case.
4585  */
4586 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4587                                 uint32_t *layouttype)
4588 {
4589         int status = 0;
4590
4591         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4592         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4593                 return -EIO;
4594         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4595                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4596                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4597         } else
4598                 *layouttype = 0;
4599         return status;
4600 }
4601
4602 /*
4603  * The prefered block size for layout directed io
4604  */
4605 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4606                                       uint32_t *res)
4607 {
4608         __be32 *p;
4609
4610         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4611         *res = 0;
4612         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4613                 p = xdr_inline_decode(xdr, 4);
4614                 if (unlikely(!p)) {
4615                         print_overflow_msg(__func__, xdr);
4616                         return -EIO;
4617                 }
4618                 *res = be32_to_cpup(p);
4619                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4620         }
4621         return 0;
4622 }
4623
4624 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4625 {
4626         unsigned int savep;
4627         uint32_t attrlen, bitmap[3];
4628         int status;
4629
4630         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4631                 goto xdr_error;
4632         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4633                 goto xdr_error;
4634         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4635                 goto xdr_error;
4636
4637         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4638
4639         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4640                 goto xdr_error;
4641         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4642                 goto xdr_error;
4643         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4644                 goto xdr_error;
4645         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4646         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4647                 goto xdr_error;
4648         fsinfo->wtpref = fsinfo->wtmax;
4649         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4650         if (status != 0)
4651                 goto xdr_error;
4652         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4653         if (status != 0)
4654                 goto xdr_error;
4655         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4656         if (status)
4657                 goto xdr_error;
4658
4659         status = verify_attr_len(xdr, savep, attrlen);
4660 xdr_error:
4661         dprintk("%s: xdr returned %d!\n", __func__, -status);
4662         return status;
4663 }
4664
4665 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4666 {
4667         __be32 *p;
4668         uint32_t len;
4669         int status;
4670
4671         /* Zero handle first to allow comparisons */
4672         memset(fh, 0, sizeof(*fh));
4673
4674         status = decode_op_hdr(xdr, OP_GETFH);
4675         if (status)
4676                 return status;
4677
4678         p = xdr_inline_decode(xdr, 4);
4679         if (unlikely(!p))
4680                 goto out_overflow;
4681         len = be32_to_cpup(p);
4682         if (len > NFS4_FHSIZE)
4683                 return -EIO;
4684         fh->size = len;
4685         p = xdr_inline_decode(xdr, len);
4686         if (unlikely(!p))
4687                 goto out_overflow;
4688         memcpy(fh->data, p, len);
4689         return 0;
4690 out_overflow:
4691         print_overflow_msg(__func__, xdr);
4692         return -EIO;
4693 }
4694
4695 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4696 {
4697         int status;
4698
4699         status = decode_op_hdr(xdr, OP_LINK);
4700         if (status)
4701                 return status;
4702         return decode_change_info(xdr, cinfo);
4703 }
4704
4705 /*
4706  * We create the owner, so we know a proper owner.id length is 4.
4707  */
4708 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4709 {
4710         uint64_t offset, length, clientid;
4711         __be32 *p;
4712         uint32_t namelen, type;
4713
4714         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4715         if (unlikely(!p))
4716                 goto out_overflow;
4717         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4718         p = xdr_decode_hyper(p, &length);
4719         type = be32_to_cpup(p++); /* 4 byte read */
4720         if (fl != NULL) { /* manipulate file lock */
4721                 fl->fl_start = (loff_t)offset;
4722                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4723                 if (length == ~(uint64_t)0)
4724                         fl->fl_end = OFFSET_MAX;
4725                 fl->fl_type = F_WRLCK;
4726                 if (type & 1)
4727                         fl->fl_type = F_RDLCK;
4728                 fl->fl_pid = 0;
4729         }
4730         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4731         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4732         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4733         if (likely(p))
4734                 return -NFS4ERR_DENIED;
4735 out_overflow:
4736         print_overflow_msg(__func__, xdr);
4737         return -EIO;
4738 }
4739
4740 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4741 {
4742         int status;
4743
4744         status = decode_op_hdr(xdr, OP_LOCK);
4745         if (status == -EIO)
4746                 goto out;
4747         if (status == 0) {
4748                 status = decode_stateid(xdr, &res->stateid);
4749                 if (unlikely(status))
4750                         goto out;
4751         } else if (status == -NFS4ERR_DENIED)
4752                 status = decode_lock_denied(xdr, NULL);
4753         if (res->open_seqid != NULL)
4754                 nfs_increment_open_seqid(status, res->open_seqid);
4755         nfs_increment_lock_seqid(status, res->lock_seqid);
4756 out:
4757         return status;
4758 }
4759
4760 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4761 {
4762         int status;
4763         status = decode_op_hdr(xdr, OP_LOCKT);
4764         if (status == -NFS4ERR_DENIED)
4765                 return decode_lock_denied(xdr, res->denied);
4766         return status;
4767 }
4768
4769 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4770 {
4771         int status;
4772
4773         status = decode_op_hdr(xdr, OP_LOCKU);
4774         if (status != -EIO)
4775                 nfs_increment_lock_seqid(status, res->seqid);
4776         if (status == 0)
4777                 status = decode_stateid(xdr, &res->stateid);
4778         return status;
4779 }
4780
4781 static int decode_release_lockowner(struct xdr_stream *xdr)
4782 {
4783         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4784 }
4785
4786 static int decode_lookup(struct xdr_stream *xdr)
4787 {
4788         return decode_op_hdr(xdr, OP_LOOKUP);
4789 }
4790
4791 /* This is too sick! */
4792 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4793 {
4794         __be32 *p;
4795         uint32_t limit_type, nblocks, blocksize;
4796
4797         p = xdr_inline_decode(xdr, 12);
4798         if (unlikely(!p))
4799                 goto out_overflow;
4800         limit_type = be32_to_cpup(p++);
4801         switch (limit_type) {
4802         case 1:
4803                 xdr_decode_hyper(p, maxsize);
4804                 break;
4805         case 2:
4806                 nblocks = be32_to_cpup(p++);
4807                 blocksize = be32_to_cpup(p);
4808                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4809         }
4810         return 0;
4811 out_overflow:
4812         print_overflow_msg(__func__, xdr);
4813         return -EIO;
4814 }
4815
4816 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4817 {
4818         __be32 *p;
4819         uint32_t delegation_type;
4820         int status;
4821
4822         p = xdr_inline_decode(xdr, 4);
4823         if (unlikely(!p))
4824                 goto out_overflow;
4825         delegation_type = be32_to_cpup(p);
4826         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4827                 res->delegation_type = 0;
4828                 return 0;
4829         }
4830         status = decode_stateid(xdr, &res->delegation);
4831         if (unlikely(status))
4832                 return status;
4833         p = xdr_inline_decode(xdr, 4);
4834         if (unlikely(!p))
4835                 goto out_overflow;
4836         res->do_recall = be32_to_cpup(p);
4837
4838         switch (delegation_type) {
4839         case NFS4_OPEN_DELEGATE_READ:
4840                 res->delegation_type = FMODE_READ;
4841                 break;
4842         case NFS4_OPEN_DELEGATE_WRITE:
4843                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4844                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4845                                 return -EIO;
4846         }
4847         return decode_ace(xdr, NULL, res->server->nfs_client);
4848 out_overflow:
4849         print_overflow_msg(__func__, xdr);
4850         return -EIO;
4851 }
4852
4853 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4854 {
4855         __be32 *p;
4856         uint32_t savewords, bmlen, i;
4857         int status;
4858
4859         status = decode_op_hdr(xdr, OP_OPEN);
4860         if (status != -EIO)
4861                 nfs_increment_open_seqid(status, res->seqid);
4862         if (!status)
4863                 status = decode_stateid(xdr, &res->stateid);
4864         if (unlikely(status))
4865                 return status;
4866
4867         decode_change_info(xdr, &res->cinfo);
4868
4869         p = xdr_inline_decode(xdr, 8);
4870         if (unlikely(!p))
4871                 goto out_overflow;
4872         res->rflags = be32_to_cpup(p++);
4873         bmlen = be32_to_cpup(p);
4874         if (bmlen > 10)
4875                 goto xdr_error;
4876
4877         p = xdr_inline_decode(xdr, bmlen << 2);
4878         if (unlikely(!p))
4879                 goto out_overflow;
4880         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4881         for (i = 0; i < savewords; ++i)
4882                 res->attrset[i] = be32_to_cpup(p++);
4883         for (; i < NFS4_BITMAP_SIZE; i++)
4884                 res->attrset[i] = 0;
4885
4886         return decode_delegation(xdr, res);
4887 xdr_error:
4888         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4889         return -EIO;
4890 out_overflow:
4891         print_overflow_msg(__func__, xdr);
4892         return -EIO;
4893 }
4894
4895 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4896 {
4897         int status;
4898
4899         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4900         if (status != -EIO)
4901                 nfs_increment_open_seqid(status, res->seqid);
4902         if (!status)
4903                 status = decode_stateid(xdr, &res->stateid);
4904         return status;
4905 }
4906
4907 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4908 {
4909         int status;
4910
4911         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4912         if (status != -EIO)
4913                 nfs_increment_open_seqid(status, res->seqid);
4914         if (!status)
4915                 status = decode_stateid(xdr, &res->stateid);
4916         return status;
4917 }
4918
4919 static int decode_putfh(struct xdr_stream *xdr)
4920 {
4921         return decode_op_hdr(xdr, OP_PUTFH);
4922 }
4923
4924 static int decode_putrootfh(struct xdr_stream *xdr)
4925 {
4926         return decode_op_hdr(xdr, OP_PUTROOTFH);
4927 }
4928
4929 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4930 {
4931         __be32 *p;
4932         uint32_t count, eof, recvd;
4933         int status;
4934
4935         status = decode_op_hdr(xdr, OP_READ);
4936         if (status)
4937                 return status;
4938         p = xdr_inline_decode(xdr, 8);
4939         if (unlikely(!p))
4940                 goto out_overflow;
4941         eof = be32_to_cpup(p++);
4942         count = be32_to_cpup(p);
4943         recvd = xdr_read_pages(xdr, count);
4944         if (count > recvd) {
4945                 dprintk("NFS: server cheating in read reply: "
4946                                 "count %u > recvd %u\n", count, recvd);
4947                 count = recvd;
4948                 eof = 0;
4949         }
4950         res->eof = eof;
4951         res->count = count;
4952         return 0;
4953 out_overflow:
4954         print_overflow_msg(__func__, xdr);
4955         return -EIO;
4956 }
4957
4958 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4959 {
4960         int             status;
4961         __be32          verf[2];
4962
4963         status = decode_op_hdr(xdr, OP_READDIR);
4964         if (!status)
4965                 status = decode_verifier(xdr, readdir->verifier.data);
4966         if (unlikely(status))
4967                 return status;
4968         memcpy(verf, readdir->verifier.data, sizeof(verf));
4969         dprintk("%s: verifier = %08x:%08x\n",
4970                         __func__, verf[0], verf[1]);
4971         return xdr_read_pages(xdr, xdr->buf->page_len);
4972 }
4973
4974 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4975 {
4976         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4977         u32 len, recvd;
4978         __be32 *p;
4979         int status;
4980
4981         status = decode_op_hdr(xdr, OP_READLINK);
4982         if (status)
4983                 return status;
4984
4985         /* Convert length of symlink */
4986         p = xdr_inline_decode(xdr, 4);
4987         if (unlikely(!p))
4988                 goto out_overflow;
4989         len = be32_to_cpup(p);
4990         if (len >= rcvbuf->page_len || len <= 0) {
4991                 dprintk("nfs: server returned giant symlink!\n");
4992                 return -ENAMETOOLONG;
4993         }
4994         recvd = xdr_read_pages(xdr, len);
4995         if (recvd < len) {
4996                 dprintk("NFS: server cheating in readlink reply: "
4997                                 "count %u > recvd %u\n", len, recvd);
4998                 return -EIO;
4999         }
5000         /*
5001          * The XDR encode routine has set things up so that
5002          * the link text will be copied directly into the
5003          * buffer.  We just have to do overflow-checking,
5004          * and and null-terminate the text (the VFS expects
5005          * null-termination).
5006          */
5007         xdr_terminate_string(rcvbuf, len);
5008         return 0;
5009 out_overflow:
5010         print_overflow_msg(__func__, xdr);
5011         return -EIO;
5012 }
5013
5014 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5015 {
5016         int status;
5017
5018         status = decode_op_hdr(xdr, OP_REMOVE);
5019         if (status)
5020                 goto out;
5021         status = decode_change_info(xdr, cinfo);
5022 out:
5023         return status;
5024 }
5025
5026 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5027               struct nfs4_change_info *new_cinfo)
5028 {
5029         int status;
5030
5031         status = decode_op_hdr(xdr, OP_RENAME);
5032         if (status)
5033                 goto out;
5034         if ((status = decode_change_info(xdr, old_cinfo)))
5035                 goto out;
5036         status = decode_change_info(xdr, new_cinfo);
5037 out:
5038         return status;
5039 }
5040
5041 static int decode_renew(struct xdr_stream *xdr)
5042 {
5043         return decode_op_hdr(xdr, OP_RENEW);
5044 }
5045
5046 static int
5047 decode_restorefh(struct xdr_stream *xdr)
5048 {
5049         return decode_op_hdr(xdr, OP_RESTOREFH);
5050 }
5051
5052 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5053                          struct nfs_getaclres *res)
5054 {
5055         unsigned int savep;
5056         uint32_t attrlen,
5057                  bitmap[3] = {0};
5058         int status;
5059         unsigned int pg_offset;
5060
5061         res->acl_len = 0;
5062         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5063                 goto out;
5064
5065         xdr_enter_page(xdr, xdr->buf->page_len);
5066
5067         /* Calculate the offset of the page data */
5068         pg_offset = xdr->buf->head[0].iov_len;
5069
5070         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5071                 goto out;
5072         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5073                 goto out;
5074
5075         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5076                 return -EIO;
5077         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5078
5079                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5080                  * are stored with the acl data to handle the problem of
5081                  * variable length bitmaps.*/
5082                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5083                 res->acl_len = attrlen;
5084
5085                 /* Check for receive buffer overflow */
5086                 if (res->acl_len > (xdr->nwords << 2) ||
5087                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5088                         res->acl_flags |= NFS4_ACL_TRUNC;
5089                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5090                                         attrlen, xdr->nwords << 2);
5091                 }
5092         } else
5093                 status = -EOPNOTSUPP;
5094
5095 out:
5096         return status;
5097 }
5098
5099 static int
5100 decode_savefh(struct xdr_stream *xdr)
5101 {
5102         return decode_op_hdr(xdr, OP_SAVEFH);
5103 }
5104
5105 static int decode_setattr(struct xdr_stream *xdr)
5106 {
5107         __be32 *p;
5108         uint32_t bmlen;
5109         int status;
5110
5111         status = decode_op_hdr(xdr, OP_SETATTR);
5112         if (status)
5113                 return status;
5114         p = xdr_inline_decode(xdr, 4);
5115         if (unlikely(!p))
5116                 goto out_overflow;
5117         bmlen = be32_to_cpup(p);
5118         p = xdr_inline_decode(xdr, bmlen << 2);
5119         if (likely(p))
5120                 return 0;
5121 out_overflow:
5122         print_overflow_msg(__func__, xdr);
5123         return -EIO;
5124 }
5125
5126 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5127 {
5128         __be32 *p;
5129         uint32_t opnum;
5130         int32_t nfserr;
5131
5132         p = xdr_inline_decode(xdr, 8);
5133         if (unlikely(!p))
5134                 goto out_overflow;
5135         opnum = be32_to_cpup(p++);
5136         if (opnum != OP_SETCLIENTID) {
5137                 dprintk("nfs: decode_setclientid: Server returned operation"
5138                         " %d\n", opnum);
5139                 return -EIO;
5140         }
5141         nfserr = be32_to_cpup(p);
5142         if (nfserr == NFS_OK) {
5143                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5144                 if (unlikely(!p))
5145                         goto out_overflow;
5146                 p = xdr_decode_hyper(p, &res->clientid);
5147                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5148         } else if (nfserr == NFSERR_CLID_INUSE) {
5149                 uint32_t len;
5150
5151                 /* skip netid string */
5152                 p = xdr_inline_decode(xdr, 4);
5153                 if (unlikely(!p))
5154                         goto out_overflow;
5155                 len = be32_to_cpup(p);
5156                 p = xdr_inline_decode(xdr, len);
5157                 if (unlikely(!p))
5158                         goto out_overflow;
5159
5160                 /* skip uaddr string */
5161                 p = xdr_inline_decode(xdr, 4);
5162                 if (unlikely(!p))
5163                         goto out_overflow;
5164                 len = be32_to_cpup(p);
5165                 p = xdr_inline_decode(xdr, len);
5166                 if (unlikely(!p))
5167                         goto out_overflow;
5168                 return -NFSERR_CLID_INUSE;
5169         } else
5170                 return nfs4_stat_to_errno(nfserr);
5171
5172         return 0;
5173 out_overflow:
5174         print_overflow_msg(__func__, xdr);
5175         return -EIO;
5176 }
5177
5178 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5179 {
5180         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5181 }
5182
5183 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5184 {
5185         __be32 *p;
5186         int status;
5187
5188         status = decode_op_hdr(xdr, OP_WRITE);
5189         if (status)
5190                 return status;
5191
5192         p = xdr_inline_decode(xdr, 8);
5193         if (unlikely(!p))
5194                 goto out_overflow;
5195         res->count = be32_to_cpup(p++);
5196         res->verf->committed = be32_to_cpup(p++);
5197         return decode_write_verifier(xdr, &res->verf->verifier);
5198 out_overflow:
5199         print_overflow_msg(__func__, xdr);
5200         return -EIO;
5201 }
5202
5203 static int decode_delegreturn(struct xdr_stream *xdr)
5204 {
5205         return decode_op_hdr(xdr, OP_DELEGRETURN);
5206 }
5207
5208 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5209 {
5210         __be32 *p;
5211
5212         p = xdr_inline_decode(xdr, 4);
5213         if (unlikely(!p))
5214                 goto out_overflow;
5215         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5216         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5217                 goto out_err;
5218
5219         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5220         if (unlikely(!p))
5221                 goto out_overflow;
5222         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5223
5224         p = xdr_inline_decode(xdr, 8);
5225         if (unlikely(!p))
5226                 goto out_overflow;
5227         flavor->gss.qop4 = be32_to_cpup(p++);
5228         flavor->gss.service = be32_to_cpup(p);
5229
5230         return 0;
5231
5232 out_overflow:
5233         print_overflow_msg(__func__, xdr);
5234         return -EIO;
5235 out_err:
5236         return -EINVAL;
5237 }
5238
5239 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5240 {
5241         struct nfs4_secinfo_flavor *sec_flavor;
5242         int status;
5243         __be32 *p;
5244         int i, num_flavors;
5245
5246         p = xdr_inline_decode(xdr, 4);
5247         if (unlikely(!p))
5248                 goto out_overflow;
5249
5250         res->flavors->num_flavors = 0;
5251         num_flavors = be32_to_cpup(p);
5252
5253         for (i = 0; i < num_flavors; i++) {
5254                 sec_flavor = &res->flavors->flavors[i];
5255                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5256                         break;
5257
5258                 p = xdr_inline_decode(xdr, 4);
5259                 if (unlikely(!p))
5260                         goto out_overflow;
5261                 sec_flavor->flavor = be32_to_cpup(p);
5262
5263                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5264                         status = decode_secinfo_gss(xdr, sec_flavor);
5265                         if (status)
5266                                 goto out;
5267                 }
5268                 res->flavors->num_flavors++;
5269         }
5270
5271         status = 0;
5272 out:
5273         return status;
5274 out_overflow:
5275         print_overflow_msg(__func__, xdr);
5276         return -EIO;
5277 }
5278
5279 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5280 {
5281         int status = decode_op_hdr(xdr, OP_SECINFO);
5282         if (status)
5283                 return status;
5284         return decode_secinfo_common(xdr, res);
5285 }
5286
5287 #if defined(CONFIG_NFS_V4_1)
5288 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5289 {
5290         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5291         if (status)
5292                 return status;
5293         return decode_secinfo_common(xdr, res);
5294 }
5295
5296 static int decode_exchange_id(struct xdr_stream *xdr,
5297                               struct nfs41_exchange_id_res *res)
5298 {
5299         __be32 *p;
5300         uint32_t dummy;
5301         char *dummy_str;
5302         int status;
5303         uint32_t impl_id_count;
5304
5305         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5306         if (status)
5307                 return status;
5308
5309         p = xdr_inline_decode(xdr, 8);
5310         if (unlikely(!p))
5311                 goto out_overflow;
5312         xdr_decode_hyper(p, &res->clientid);
5313         p = xdr_inline_decode(xdr, 12);
5314         if (unlikely(!p))
5315                 goto out_overflow;
5316         res->seqid = be32_to_cpup(p++);
5317         res->flags = be32_to_cpup(p++);
5318
5319         /* We ask for SP4_NONE */
5320         dummy = be32_to_cpup(p);
5321         if (dummy != SP4_NONE)
5322                 return -EIO;
5323
5324         /* server_owner4.so_minor_id */
5325         p = xdr_inline_decode(xdr, 8);
5326         if (unlikely(!p))
5327                 goto out_overflow;
5328         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5329
5330         /* server_owner4.so_major_id */
5331         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5332         if (unlikely(status))
5333                 return status;
5334         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5335                 return -EIO;
5336         memcpy(res->server_owner->major_id, dummy_str, dummy);
5337         res->server_owner->major_id_sz = dummy;
5338
5339         /* server_scope4 */
5340         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5341         if (unlikely(status))
5342                 return status;
5343         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5344                 return -EIO;
5345         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5346         res->server_scope->server_scope_sz = dummy;
5347
5348         /* Implementation Id */
5349         p = xdr_inline_decode(xdr, 4);
5350         if (unlikely(!p))
5351                 goto out_overflow;
5352         impl_id_count = be32_to_cpup(p++);
5353
5354         if (impl_id_count) {
5355                 /* nii_domain */
5356                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5357                 if (unlikely(status))
5358                         return status;
5359                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5360                         return -EIO;
5361                 memcpy(res->impl_id->domain, dummy_str, dummy);
5362
5363                 /* nii_name */
5364                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5365                 if (unlikely(status))
5366                         return status;
5367                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5368                         return -EIO;
5369                 memcpy(res->impl_id->name, dummy_str, dummy);
5370
5371                 /* nii_date */
5372                 p = xdr_inline_decode(xdr, 12);
5373                 if (unlikely(!p))
5374                         goto out_overflow;
5375                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5376                 res->impl_id->date.nseconds = be32_to_cpup(p);
5377
5378                 /* if there's more than one entry, ignore the rest */
5379         }
5380         return 0;
5381 out_overflow:
5382         print_overflow_msg(__func__, xdr);
5383         return -EIO;
5384 }
5385
5386 static int decode_chan_attrs(struct xdr_stream *xdr,
5387                              struct nfs4_channel_attrs *attrs)
5388 {
5389         __be32 *p;
5390         u32 nr_attrs, val;
5391
5392         p = xdr_inline_decode(xdr, 28);
5393         if (unlikely(!p))
5394                 goto out_overflow;
5395         val = be32_to_cpup(p++);        /* headerpadsz */
5396         if (val)
5397                 return -EINVAL;         /* no support for header padding yet */
5398         attrs->max_rqst_sz = be32_to_cpup(p++);
5399         attrs->max_resp_sz = be32_to_cpup(p++);
5400         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5401         attrs->max_ops = be32_to_cpup(p++);
5402         attrs->max_reqs = be32_to_cpup(p++);
5403         nr_attrs = be32_to_cpup(p);
5404         if (unlikely(nr_attrs > 1)) {
5405                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5406                         "count %u\n", __func__, nr_attrs);
5407                 return -EINVAL;
5408         }
5409         if (nr_attrs == 1) {
5410                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5411                 if (unlikely(!p))
5412                         goto out_overflow;
5413         }
5414         return 0;
5415 out_overflow:
5416         print_overflow_msg(__func__, xdr);
5417         return -EIO;
5418 }
5419
5420 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5421 {
5422         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5423 }
5424
5425 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5426                                 struct nfs41_bind_conn_to_session_res *res)
5427 {
5428         __be32 *p;
5429         int status;
5430
5431         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5432         if (!status)
5433                 status = decode_sessionid(xdr, &res->session->sess_id);
5434         if (unlikely(status))
5435                 return status;
5436
5437         /* dir flags, rdma mode bool */
5438         p = xdr_inline_decode(xdr, 8);
5439         if (unlikely(!p))
5440                 goto out_overflow;
5441
5442         res->dir = be32_to_cpup(p++);
5443         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5444                 return -EIO;
5445         if (be32_to_cpup(p) == 0)
5446                 res->use_conn_in_rdma_mode = false;
5447         else
5448                 res->use_conn_in_rdma_mode = true;
5449
5450         return 0;
5451 out_overflow:
5452         print_overflow_msg(__func__, xdr);
5453         return -EIO;
5454 }
5455
5456 static int decode_create_session(struct xdr_stream *xdr,
5457                                  struct nfs41_create_session_res *res)
5458 {
5459         __be32 *p;
5460         int status;
5461         struct nfs_client *clp = res->client;
5462         struct nfs4_session *session = clp->cl_session;
5463
5464         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5465         if (!status)
5466                 status = decode_sessionid(xdr, &session->sess_id);
5467         if (unlikely(status))
5468                 return status;
5469
5470         /* seqid, flags */
5471         p = xdr_inline_decode(xdr, 8);
5472         if (unlikely(!p))
5473                 goto out_overflow;
5474         clp->cl_seqid = be32_to_cpup(p++);
5475         session->flags = be32_to_cpup(p);
5476
5477         /* Channel attributes */
5478         status = decode_chan_attrs(xdr, &session->fc_attrs);
5479         if (!status)
5480                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5481         return status;
5482 out_overflow:
5483         print_overflow_msg(__func__, xdr);
5484         return -EIO;
5485 }
5486
5487 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5488 {
5489         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5490 }
5491
5492 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5493 {
5494         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5495 }
5496
5497 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5498 {
5499         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5500 }
5501 #endif /* CONFIG_NFS_V4_1 */
5502
5503 static int decode_sequence(struct xdr_stream *xdr,
5504                            struct nfs4_sequence_res *res,
5505                            struct rpc_rqst *rqstp)
5506 {
5507 #if defined(CONFIG_NFS_V4_1)
5508         struct nfs4_session *session;
5509         struct nfs4_sessionid id;
5510         u32 dummy;
5511         int status;
5512         __be32 *p;
5513
5514         if (res->sr_slot == NULL)
5515                 return 0;
5516
5517         status = decode_op_hdr(xdr, OP_SEQUENCE);
5518         if (!status)
5519                 status = decode_sessionid(xdr, &id);
5520         if (unlikely(status))
5521                 goto out_err;
5522
5523         /*
5524          * If the server returns different values for sessionID, slotID or
5525          * sequence number, the server is looney tunes.
5526          */
5527         status = -EREMOTEIO;
5528         session = res->sr_slot->table->session;
5529
5530         if (memcmp(id.data, session->sess_id.data,
5531                    NFS4_MAX_SESSIONID_LEN)) {
5532                 dprintk("%s Invalid session id\n", __func__);
5533                 goto out_err;
5534         }
5535
5536         p = xdr_inline_decode(xdr, 20);
5537         if (unlikely(!p))
5538                 goto out_overflow;
5539
5540         /* seqid */
5541         dummy = be32_to_cpup(p++);
5542         if (dummy != res->sr_slot->seq_nr) {
5543                 dprintk("%s Invalid sequence number\n", __func__);
5544                 goto out_err;
5545         }
5546         /* slot id */
5547         dummy = be32_to_cpup(p++);
5548         if (dummy != res->sr_slot->slot_nr) {
5549                 dprintk("%s Invalid slot id\n", __func__);
5550                 goto out_err;
5551         }
5552         /* highest slot id */
5553         res->sr_highest_slotid = be32_to_cpup(p++);
5554         /* target highest slot id */
5555         res->sr_target_highest_slotid = be32_to_cpup(p++);
5556         /* result flags */
5557         res->sr_status_flags = be32_to_cpup(p);
5558         status = 0;
5559 out_err:
5560         res->sr_status = status;
5561         return status;
5562 out_overflow:
5563         print_overflow_msg(__func__, xdr);
5564         status = -EIO;
5565         goto out_err;
5566 #else  /* CONFIG_NFS_V4_1 */
5567         return 0;
5568 #endif /* CONFIG_NFS_V4_1 */
5569 }
5570
5571 #if defined(CONFIG_NFS_V4_1)
5572 /*
5573  * TODO: Need to handle case when EOF != true;
5574  */
5575 static int decode_getdevicelist(struct xdr_stream *xdr,
5576                                 struct pnfs_devicelist *res)
5577 {
5578         __be32 *p;
5579         int status, i;
5580         nfs4_verifier verftemp;
5581
5582         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5583         if (status)
5584                 return status;
5585
5586         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5587         if (unlikely(!p))
5588                 goto out_overflow;
5589
5590         /* TODO: Skip cookie for now */
5591         p += 2;
5592
5593         /* Read verifier */
5594         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5595
5596         res->num_devs = be32_to_cpup(p);
5597
5598         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5599
5600         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5601                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5602                                 __func__, res->num_devs);
5603                 return -EIO;
5604         }
5605
5606         p = xdr_inline_decode(xdr,
5607                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5608         if (unlikely(!p))
5609                 goto out_overflow;
5610         for (i = 0; i < res->num_devs; i++)
5611                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5612                                             NFS4_DEVICEID4_SIZE);
5613         res->eof = be32_to_cpup(p);
5614         return 0;
5615 out_overflow:
5616         print_overflow_msg(__func__, xdr);
5617         return -EIO;
5618 }
5619
5620 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5621                                 struct pnfs_device *pdev)
5622 {
5623         __be32 *p;
5624         uint32_t len, type;
5625         int status;
5626
5627         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5628         if (status) {
5629                 if (status == -ETOOSMALL) {
5630                         p = xdr_inline_decode(xdr, 4);
5631                         if (unlikely(!p))
5632                                 goto out_overflow;
5633                         pdev->mincount = be32_to_cpup(p);
5634                         dprintk("%s: Min count too small. mincnt = %u\n",
5635                                 __func__, pdev->mincount);
5636                 }
5637                 return status;
5638         }
5639
5640         p = xdr_inline_decode(xdr, 8);
5641         if (unlikely(!p))
5642                 goto out_overflow;
5643         type = be32_to_cpup(p++);
5644         if (type != pdev->layout_type) {
5645                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5646                         __func__, pdev->layout_type, type);
5647                 return -EINVAL;
5648         }
5649         /*
5650          * Get the length of the opaque device_addr4. xdr_read_pages places
5651          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5652          * and places the remaining xdr data in xdr_buf->tail
5653          */
5654         pdev->mincount = be32_to_cpup(p);
5655         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5656                 goto out_overflow;
5657
5658         /* Parse notification bitmap, verifying that it is zero. */
5659         p = xdr_inline_decode(xdr, 4);
5660         if (unlikely(!p))
5661                 goto out_overflow;
5662         len = be32_to_cpup(p);
5663         if (len) {
5664                 uint32_t i;
5665
5666                 p = xdr_inline_decode(xdr, 4 * len);
5667                 if (unlikely(!p))
5668                         goto out_overflow;
5669                 for (i = 0; i < len; i++, p++) {
5670                         if (be32_to_cpup(p)) {
5671                                 dprintk("%s: notifications not supported\n",
5672                                         __func__);
5673                                 return -EIO;
5674                         }
5675                 }
5676         }
5677         return 0;
5678 out_overflow:
5679         print_overflow_msg(__func__, xdr);
5680         return -EIO;
5681 }
5682
5683 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5684                             struct nfs4_layoutget_res *res)
5685 {
5686         __be32 *p;
5687         int status;
5688         u32 layout_count;
5689         u32 recvd;
5690
5691         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5692         if (status)
5693                 return status;
5694         p = xdr_inline_decode(xdr, 4);
5695         if (unlikely(!p))
5696                 goto out_overflow;
5697         res->return_on_close = be32_to_cpup(p);
5698         decode_stateid(xdr, &res->stateid);
5699         p = xdr_inline_decode(xdr, 4);
5700         if (unlikely(!p))
5701                 goto out_overflow;
5702         layout_count = be32_to_cpup(p);
5703         if (!layout_count) {
5704                 dprintk("%s: server responded with empty layout array\n",
5705                         __func__);
5706                 return -EINVAL;
5707         }
5708
5709         p = xdr_inline_decode(xdr, 28);
5710         if (unlikely(!p))
5711                 goto out_overflow;
5712         p = xdr_decode_hyper(p, &res->range.offset);
5713         p = xdr_decode_hyper(p, &res->range.length);
5714         res->range.iomode = be32_to_cpup(p++);
5715         res->type = be32_to_cpup(p++);
5716         res->layoutp->len = be32_to_cpup(p);
5717
5718         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5719                 __func__,
5720                 (unsigned long)res->range.offset,
5721                 (unsigned long)res->range.length,
5722                 res->range.iomode,
5723                 res->type,
5724                 res->layoutp->len);
5725
5726         recvd = xdr_read_pages(xdr, res->layoutp->len);
5727         if (res->layoutp->len > recvd) {
5728                 dprintk("NFS: server cheating in layoutget reply: "
5729                                 "layout len %u > recvd %u\n",
5730                                 res->layoutp->len, recvd);
5731                 return -EINVAL;
5732         }
5733
5734         if (layout_count > 1) {
5735                 /* We only handle a length one array at the moment.  Any
5736                  * further entries are just ignored.  Note that this means
5737                  * the client may see a response that is less than the
5738                  * minimum it requested.
5739                  */
5740                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5741                         __func__, layout_count);
5742         }
5743
5744         return 0;
5745 out_overflow:
5746         print_overflow_msg(__func__, xdr);
5747         return -EIO;
5748 }
5749
5750 static int decode_layoutreturn(struct xdr_stream *xdr,
5751                                struct nfs4_layoutreturn_res *res)
5752 {
5753         __be32 *p;
5754         int status;
5755
5756         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5757         if (status)
5758                 return status;
5759         p = xdr_inline_decode(xdr, 4);
5760         if (unlikely(!p))
5761                 goto out_overflow;
5762         res->lrs_present = be32_to_cpup(p);
5763         if (res->lrs_present)
5764                 status = decode_stateid(xdr, &res->stateid);
5765         return status;
5766 out_overflow:
5767         print_overflow_msg(__func__, xdr);
5768         return -EIO;
5769 }
5770
5771 static int decode_layoutcommit(struct xdr_stream *xdr,
5772                                struct rpc_rqst *req,
5773                                struct nfs4_layoutcommit_res *res)
5774 {
5775         __be32 *p;
5776         __u32 sizechanged;
5777         int status;
5778
5779         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5780         res->status = status;
5781         if (status)
5782                 return status;
5783
5784         p = xdr_inline_decode(xdr, 4);
5785         if (unlikely(!p))
5786                 goto out_overflow;
5787         sizechanged = be32_to_cpup(p);
5788
5789         if (sizechanged) {
5790                 /* throw away new size */
5791                 p = xdr_inline_decode(xdr, 8);
5792                 if (unlikely(!p))
5793                         goto out_overflow;
5794         }
5795         return 0;
5796 out_overflow:
5797         print_overflow_msg(__func__, xdr);
5798         return -EIO;
5799 }
5800
5801 static int decode_test_stateid(struct xdr_stream *xdr,
5802                                struct nfs41_test_stateid_res *res)
5803 {
5804         __be32 *p;
5805         int status;
5806         int num_res;
5807
5808         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5809         if (status)
5810                 return status;
5811
5812         p = xdr_inline_decode(xdr, 4);
5813         if (unlikely(!p))
5814                 goto out_overflow;
5815         num_res = be32_to_cpup(p++);
5816         if (num_res != 1)
5817                 goto out;
5818
5819         p = xdr_inline_decode(xdr, 4);
5820         if (unlikely(!p))
5821                 goto out_overflow;
5822         res->status = be32_to_cpup(p++);
5823
5824         return status;
5825 out_overflow:
5826         print_overflow_msg(__func__, xdr);
5827 out:
5828         return -EIO;
5829 }
5830
5831 static int decode_free_stateid(struct xdr_stream *xdr,
5832                                struct nfs41_free_stateid_res *res)
5833 {
5834         __be32 *p;
5835         int status;
5836
5837         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5838         if (status)
5839                 return status;
5840
5841         p = xdr_inline_decode(xdr, 4);
5842         if (unlikely(!p))
5843                 goto out_overflow;
5844         res->status = be32_to_cpup(p++);
5845         return res->status;
5846 out_overflow:
5847         print_overflow_msg(__func__, xdr);
5848         return -EIO;
5849 }
5850 #endif /* CONFIG_NFS_V4_1 */
5851
5852 /*
5853  * END OF "GENERIC" DECODE ROUTINES.
5854  */
5855
5856 /*
5857  * Decode OPEN_DOWNGRADE response
5858  */
5859 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5860                                        struct xdr_stream *xdr,
5861                                        struct nfs_closeres *res)
5862 {
5863         struct compound_hdr hdr;
5864         int status;
5865
5866         status = decode_compound_hdr(xdr, &hdr);
5867         if (status)
5868                 goto out;
5869         status = decode_sequence(xdr, &res->seq_res, rqstp);
5870         if (status)
5871                 goto out;
5872         status = decode_putfh(xdr);
5873         if (status)
5874                 goto out;
5875         status = decode_open_downgrade(xdr, res);
5876         if (status != 0)
5877                 goto out;
5878         decode_getfattr(xdr, res->fattr, res->server);
5879 out:
5880         return status;
5881 }
5882
5883 /*
5884  * Decode ACCESS response
5885  */
5886 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5887                                struct nfs4_accessres *res)
5888 {
5889         struct compound_hdr hdr;
5890         int status;
5891
5892         status = decode_compound_hdr(xdr, &hdr);
5893         if (status)
5894                 goto out;
5895         status = decode_sequence(xdr, &res->seq_res, rqstp);
5896         if (status)
5897                 goto out;
5898         status = decode_putfh(xdr);
5899         if (status != 0)
5900                 goto out;
5901         status = decode_access(xdr, &res->supported, &res->access);
5902         if (status != 0)
5903                 goto out;
5904         decode_getfattr(xdr, res->fattr, res->server);
5905 out:
5906         return status;
5907 }
5908
5909 /*
5910  * Decode LOOKUP response
5911  */
5912 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5913                                struct nfs4_lookup_res *res)
5914 {
5915         struct compound_hdr hdr;
5916         int status;
5917
5918         status = decode_compound_hdr(xdr, &hdr);
5919         if (status)
5920                 goto out;
5921         status = decode_sequence(xdr, &res->seq_res, rqstp);
5922         if (status)
5923                 goto out;
5924         status = decode_putfh(xdr);
5925         if (status)
5926                 goto out;
5927         status = decode_lookup(xdr);
5928         if (status)
5929                 goto out;
5930         status = decode_getfh(xdr, res->fh);
5931         if (status)
5932                 goto out;
5933         status = decode_getfattr(xdr, res->fattr, res->server);
5934 out:
5935         return status;
5936 }
5937
5938 /*
5939  * Decode LOOKUP_ROOT response
5940  */
5941 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5942                                     struct xdr_stream *xdr,
5943                                     struct nfs4_lookup_res *res)
5944 {
5945         struct compound_hdr hdr;
5946         int status;
5947
5948         status = decode_compound_hdr(xdr, &hdr);
5949         if (status)
5950                 goto out;
5951         status = decode_sequence(xdr, &res->seq_res, rqstp);
5952         if (status)
5953                 goto out;
5954         status = decode_putrootfh(xdr);
5955         if (status)
5956                 goto out;
5957         status = decode_getfh(xdr, res->fh);
5958         if (status == 0)
5959                 status = decode_getfattr(xdr, res->fattr, res->server);
5960 out:
5961         return status;
5962 }
5963
5964 /*
5965  * Decode REMOVE response
5966  */
5967 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5968                                struct nfs_removeres *res)
5969 {
5970         struct compound_hdr hdr;
5971         int status;
5972
5973         status = decode_compound_hdr(xdr, &hdr);
5974         if (status)
5975                 goto out;
5976         status = decode_sequence(xdr, &res->seq_res, rqstp);
5977         if (status)
5978                 goto out;
5979         status = decode_putfh(xdr);
5980         if (status)
5981                 goto out;
5982         status = decode_remove(xdr, &res->cinfo);
5983 out:
5984         return status;
5985 }
5986
5987 /*
5988  * Decode RENAME response
5989  */
5990 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5991                                struct nfs_renameres *res)
5992 {
5993         struct compound_hdr hdr;
5994         int status;
5995
5996         status = decode_compound_hdr(xdr, &hdr);
5997         if (status)
5998                 goto out;
5999         status = decode_sequence(xdr, &res->seq_res, rqstp);
6000         if (status)
6001                 goto out;
6002         status = decode_putfh(xdr);
6003         if (status)
6004                 goto out;
6005         status = decode_savefh(xdr);
6006         if (status)
6007                 goto out;
6008         status = decode_putfh(xdr);
6009         if (status)
6010                 goto out;
6011         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6012 out:
6013         return status;
6014 }
6015
6016 /*
6017  * Decode LINK response
6018  */
6019 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6020                              struct nfs4_link_res *res)
6021 {
6022         struct compound_hdr hdr;
6023         int status;
6024
6025         status = decode_compound_hdr(xdr, &hdr);
6026         if (status)
6027                 goto out;
6028         status = decode_sequence(xdr, &res->seq_res, rqstp);
6029         if (status)
6030                 goto out;
6031         status = decode_putfh(xdr);
6032         if (status)
6033                 goto out;
6034         status = decode_savefh(xdr);
6035         if (status)
6036                 goto out;
6037         status = decode_putfh(xdr);
6038         if (status)
6039                 goto out;
6040         status = decode_link(xdr, &res->cinfo);
6041         if (status)
6042             &nbs