udf: Refuse RW mount of the filesystem instead of making it RO
[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 #define NFS4_dec_setclientid_confirm_sz \
535                                 (compound_decode_hdr_maxsz + \
536                                 decode_setclientid_confirm_maxsz)
537 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
538                                 encode_sequence_maxsz + \
539                                 encode_putfh_maxsz + \
540                                 encode_lock_maxsz)
541 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
542                                 decode_sequence_maxsz + \
543                                 decode_putfh_maxsz + \
544                                 decode_lock_maxsz)
545 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
546                                 encode_sequence_maxsz + \
547                                 encode_putfh_maxsz + \
548                                 encode_lockt_maxsz)
549 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
550                                  decode_sequence_maxsz + \
551                                  decode_putfh_maxsz + \
552                                  decode_lockt_maxsz)
553 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
554                                 encode_sequence_maxsz + \
555                                 encode_putfh_maxsz + \
556                                 encode_locku_maxsz)
557 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
558                                 decode_sequence_maxsz + \
559                                 decode_putfh_maxsz + \
560                                 decode_locku_maxsz)
561 #define NFS4_enc_release_lockowner_sz \
562                                 (compound_encode_hdr_maxsz + \
563                                  encode_lockowner_maxsz)
564 #define NFS4_dec_release_lockowner_sz \
565                                 (compound_decode_hdr_maxsz + \
566                                  decode_lockowner_maxsz)
567 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
568                                 encode_sequence_maxsz + \
569                                 encode_putfh_maxsz + \
570                                 encode_access_maxsz + \
571                                 encode_getattr_maxsz)
572 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
573                                 decode_sequence_maxsz + \
574                                 decode_putfh_maxsz + \
575                                 decode_access_maxsz + \
576                                 decode_getattr_maxsz)
577 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
578                                 encode_sequence_maxsz + \
579                                 encode_putfh_maxsz + \
580                                 encode_getattr_maxsz)
581 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
582                                 decode_sequence_maxsz + \
583                                 decode_putfh_maxsz + \
584                                 decode_getattr_maxsz)
585 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
586                                 encode_sequence_maxsz + \
587                                 encode_putfh_maxsz + \
588                                 encode_lookup_maxsz + \
589                                 encode_getattr_maxsz + \
590                                 encode_getfh_maxsz)
591 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
592                                 decode_sequence_maxsz + \
593                                 decode_putfh_maxsz + \
594                                 decode_lookup_maxsz + \
595                                 decode_getattr_maxsz + \
596                                 decode_getfh_maxsz)
597 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
598                                 encode_sequence_maxsz + \
599                                 encode_putrootfh_maxsz + \
600                                 encode_getattr_maxsz + \
601                                 encode_getfh_maxsz)
602 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
603                                 decode_sequence_maxsz + \
604                                 decode_putrootfh_maxsz + \
605                                 decode_getattr_maxsz + \
606                                 decode_getfh_maxsz)
607 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
608                                 encode_sequence_maxsz + \
609                                 encode_putfh_maxsz + \
610                                 encode_remove_maxsz)
611 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
612                                 decode_sequence_maxsz + \
613                                 decode_putfh_maxsz + \
614                                 decode_remove_maxsz)
615 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
616                                 encode_sequence_maxsz + \
617                                 encode_putfh_maxsz + \
618                                 encode_savefh_maxsz + \
619                                 encode_putfh_maxsz + \
620                                 encode_rename_maxsz)
621 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
622                                 decode_sequence_maxsz + \
623                                 decode_putfh_maxsz + \
624                                 decode_savefh_maxsz + \
625                                 decode_putfh_maxsz + \
626                                 decode_rename_maxsz)
627 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
628                                 encode_sequence_maxsz + \
629                                 encode_putfh_maxsz + \
630                                 encode_savefh_maxsz + \
631                                 encode_putfh_maxsz + \
632                                 encode_link_maxsz + \
633                                 encode_restorefh_maxsz + \
634                                 encode_getattr_maxsz)
635 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
636                                 decode_sequence_maxsz + \
637                                 decode_putfh_maxsz + \
638                                 decode_savefh_maxsz + \
639                                 decode_putfh_maxsz + \
640                                 decode_link_maxsz + \
641                                 decode_restorefh_maxsz + \
642                                 decode_getattr_maxsz)
643 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
644                                 encode_sequence_maxsz + \
645                                 encode_putfh_maxsz + \
646                                 encode_symlink_maxsz + \
647                                 encode_getattr_maxsz + \
648                                 encode_getfh_maxsz)
649 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
650                                 decode_sequence_maxsz + \
651                                 decode_putfh_maxsz + \
652                                 decode_symlink_maxsz + \
653                                 decode_getattr_maxsz + \
654                                 decode_getfh_maxsz)
655 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
656                                 encode_sequence_maxsz + \
657                                 encode_putfh_maxsz + \
658                                 encode_create_maxsz + \
659                                 encode_getfh_maxsz + \
660                                 encode_getattr_maxsz)
661 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
662                                 decode_sequence_maxsz + \
663                                 decode_putfh_maxsz + \
664                                 decode_create_maxsz + \
665                                 decode_getfh_maxsz + \
666                                 decode_getattr_maxsz)
667 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
668                                 encode_sequence_maxsz + \
669                                 encode_putfh_maxsz + \
670                                 encode_getattr_maxsz)
671 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
672                                 decode_sequence_maxsz + \
673                                 decode_putfh_maxsz + \
674                                 decode_getattr_maxsz)
675 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
676                                 encode_sequence_maxsz + \
677                                 encode_putfh_maxsz + \
678                                 encode_statfs_maxsz)
679 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
680                                 decode_sequence_maxsz + \
681                                 decode_putfh_maxsz + \
682                                 decode_statfs_maxsz)
683 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
684                                 encode_sequence_maxsz + \
685                                 encode_putfh_maxsz + \
686                                 encode_getattr_maxsz)
687 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
688                                 decode_sequence_maxsz + \
689                                 decode_putfh_maxsz + \
690                                 decode_getattr_maxsz)
691 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
692                                 encode_sequence_maxsz + \
693                                 encode_putfh_maxsz + \
694                                 encode_delegreturn_maxsz + \
695                                 encode_getattr_maxsz)
696 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
697                                 decode_sequence_maxsz + \
698                                 decode_delegreturn_maxsz + \
699                                 decode_getattr_maxsz)
700 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
701                                 encode_sequence_maxsz + \
702                                 encode_putfh_maxsz + \
703                                 encode_getacl_maxsz)
704 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
705                                 decode_sequence_maxsz + \
706                                 decode_putfh_maxsz + \
707                                 decode_getacl_maxsz)
708 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
709                                 encode_sequence_maxsz + \
710                                 encode_putfh_maxsz + \
711                                 encode_setacl_maxsz)
712 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
713                                 decode_sequence_maxsz + \
714                                 decode_putfh_maxsz + \
715                                 decode_setacl_maxsz)
716 #define NFS4_enc_fs_locations_sz \
717                                 (compound_encode_hdr_maxsz + \
718                                  encode_sequence_maxsz + \
719                                  encode_putfh_maxsz + \
720                                  encode_lookup_maxsz + \
721                                  encode_fs_locations_maxsz)
722 #define NFS4_dec_fs_locations_sz \
723                                 (compound_decode_hdr_maxsz + \
724                                  decode_sequence_maxsz + \
725                                  decode_putfh_maxsz + \
726                                  decode_lookup_maxsz + \
727                                  decode_fs_locations_maxsz)
728 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
729                                 encode_sequence_maxsz + \
730                                 encode_putfh_maxsz + \
731                                 encode_secinfo_maxsz)
732 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
733                                 decode_sequence_maxsz + \
734                                 decode_putfh_maxsz + \
735                                 decode_secinfo_maxsz)
736 #if defined(CONFIG_NFS_V4_1)
737 #define NFS4_enc_bind_conn_to_session_sz \
738                                 (compound_encode_hdr_maxsz + \
739                                  encode_bind_conn_to_session_maxsz)
740 #define NFS4_dec_bind_conn_to_session_sz \
741                                 (compound_decode_hdr_maxsz + \
742                                  decode_bind_conn_to_session_maxsz)
743 #define NFS4_enc_exchange_id_sz \
744                                 (compound_encode_hdr_maxsz + \
745                                  encode_exchange_id_maxsz)
746 #define NFS4_dec_exchange_id_sz \
747                                 (compound_decode_hdr_maxsz + \
748                                  decode_exchange_id_maxsz)
749 #define NFS4_enc_create_session_sz \
750                                 (compound_encode_hdr_maxsz + \
751                                  encode_create_session_maxsz)
752 #define NFS4_dec_create_session_sz \
753                                 (compound_decode_hdr_maxsz + \
754                                  decode_create_session_maxsz)
755 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
756                                          encode_destroy_session_maxsz)
757 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
758                                          decode_destroy_session_maxsz)
759 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
760                                          encode_destroy_clientid_maxsz)
761 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
762                                          decode_destroy_clientid_maxsz)
763 #define NFS4_enc_sequence_sz \
764                                 (compound_decode_hdr_maxsz + \
765                                  encode_sequence_maxsz)
766 #define NFS4_dec_sequence_sz \
767                                 (compound_decode_hdr_maxsz + \
768                                  decode_sequence_maxsz)
769 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
770                                          encode_sequence_maxsz + \
771                                          encode_putrootfh_maxsz + \
772                                          encode_fsinfo_maxsz)
773 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
774                                          decode_sequence_maxsz + \
775                                          decode_putrootfh_maxsz + \
776                                          decode_fsinfo_maxsz)
777 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
778                                          encode_sequence_maxsz + \
779                                          encode_reclaim_complete_maxsz)
780 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
781                                          decode_sequence_maxsz + \
782                                          decode_reclaim_complete_maxsz)
783 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
784                                 encode_sequence_maxsz + \
785                                 encode_putfh_maxsz + \
786                                 encode_getdevicelist_maxsz)
787 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
788                                 decode_sequence_maxsz + \
789                                 decode_putfh_maxsz + \
790                                 decode_getdevicelist_maxsz)
791 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
792                                 encode_sequence_maxsz +\
793                                 encode_getdeviceinfo_maxsz)
794 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
795                                 decode_sequence_maxsz + \
796                                 decode_getdeviceinfo_maxsz)
797 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
798                                 encode_sequence_maxsz + \
799                                 encode_putfh_maxsz +        \
800                                 encode_layoutget_maxsz)
801 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
802                                 decode_sequence_maxsz + \
803                                 decode_putfh_maxsz +        \
804                                 decode_layoutget_maxsz)
805 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
806                                 encode_sequence_maxsz +\
807                                 encode_putfh_maxsz + \
808                                 encode_layoutcommit_maxsz + \
809                                 encode_getattr_maxsz)
810 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
811                                 decode_sequence_maxsz + \
812                                 decode_putfh_maxsz + \
813                                 decode_layoutcommit_maxsz + \
814                                 decode_getattr_maxsz)
815 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
816                                 encode_sequence_maxsz + \
817                                 encode_putfh_maxsz + \
818                                 encode_layoutreturn_maxsz)
819 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
820                                 decode_sequence_maxsz + \
821                                 decode_putfh_maxsz + \
822                                 decode_layoutreturn_maxsz)
823 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
824                                         encode_sequence_maxsz + \
825                                         encode_putrootfh_maxsz +\
826                                         encode_secinfo_no_name_maxsz)
827 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
828                                         decode_sequence_maxsz + \
829                                         decode_putrootfh_maxsz + \
830                                         decode_secinfo_no_name_maxsz)
831 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
832                                          encode_sequence_maxsz + \
833                                          encode_test_stateid_maxsz)
834 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
835                                          decode_sequence_maxsz + \
836                                          decode_test_stateid_maxsz)
837 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
838                                          encode_sequence_maxsz + \
839                                          encode_free_stateid_maxsz)
840 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
841                                          decode_sequence_maxsz + \
842                                          decode_free_stateid_maxsz)
843
844 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
845                                       compound_encode_hdr_maxsz +
846                                       encode_sequence_maxsz +
847                                       encode_putfh_maxsz +
848                                       encode_getattr_maxsz) *
849                                      XDR_UNIT);
850
851 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
852                                      compound_decode_hdr_maxsz +
853                                      decode_sequence_maxsz +
854                                      decode_putfh_maxsz) *
855                                     XDR_UNIT);
856 #endif /* CONFIG_NFS_V4_1 */
857
858 static const umode_t nfs_type2fmt[] = {
859         [NF4BAD] = 0,
860         [NF4REG] = S_IFREG,
861         [NF4DIR] = S_IFDIR,
862         [NF4BLK] = S_IFBLK,
863         [NF4CHR] = S_IFCHR,
864         [NF4LNK] = S_IFLNK,
865         [NF4SOCK] = S_IFSOCK,
866         [NF4FIFO] = S_IFIFO,
867         [NF4ATTRDIR] = 0,
868         [NF4NAMEDATTR] = 0,
869 };
870
871 struct compound_hdr {
872         int32_t         status;
873         uint32_t        nops;
874         __be32 *        nops_p;
875         uint32_t        taglen;
876         char *          tag;
877         uint32_t        replen;         /* expected reply words */
878         u32             minorversion;
879 };
880
881 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
882 {
883         __be32 *p = xdr_reserve_space(xdr, nbytes);
884         BUG_ON(!p);
885         return p;
886 }
887
888 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
889 {
890         __be32 *p;
891
892         p = xdr_reserve_space(xdr, len);
893         xdr_encode_opaque_fixed(p, buf, len);
894 }
895
896 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
897 {
898         __be32 *p;
899
900         p = reserve_space(xdr, 4 + len);
901         xdr_encode_opaque(p, str, len);
902 }
903
904 static void encode_uint32(struct xdr_stream *xdr, u32 n)
905 {
906         __be32 *p;
907
908         p = reserve_space(xdr, 4);
909         *p = cpu_to_be32(n);
910 }
911
912 static void encode_uint64(struct xdr_stream *xdr, u64 n)
913 {
914         __be32 *p;
915
916         p = reserve_space(xdr, 8);
917         xdr_encode_hyper(p, n);
918 }
919
920 static void encode_nfs4_seqid(struct xdr_stream *xdr,
921                 const struct nfs_seqid *seqid)
922 {
923         encode_uint32(xdr, seqid->sequence->counter);
924 }
925
926 static void encode_compound_hdr(struct xdr_stream *xdr,
927                                 struct rpc_rqst *req,
928                                 struct compound_hdr *hdr)
929 {
930         __be32 *p;
931         struct rpc_auth *auth = req->rq_cred->cr_auth;
932
933         /* initialize running count of expected bytes in reply.
934          * NOTE: the replied tag SHOULD be the same is the one sent,
935          * but this is not required as a MUST for the server to do so. */
936         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
937
938         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
939         encode_string(xdr, hdr->taglen, hdr->tag);
940         p = reserve_space(xdr, 8);
941         *p++ = cpu_to_be32(hdr->minorversion);
942         hdr->nops_p = p;
943         *p = cpu_to_be32(hdr->nops);
944 }
945
946 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
947                 uint32_t replen,
948                 struct compound_hdr *hdr)
949 {
950         encode_uint32(xdr, op);
951         hdr->nops++;
952         hdr->replen += replen;
953 }
954
955 static void encode_nops(struct compound_hdr *hdr)
956 {
957         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
958         *hdr->nops_p = htonl(hdr->nops);
959 }
960
961 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
962 {
963         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
964 }
965
966 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
967 {
968         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
969 }
970
971 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
972 {
973         char owner_name[IDMAP_NAMESZ];
974         char owner_group[IDMAP_NAMESZ];
975         int owner_namelen = 0;
976         int owner_grouplen = 0;
977         __be32 *p;
978         __be32 *q;
979         int len;
980         uint32_t bmval0 = 0;
981         uint32_t bmval1 = 0;
982
983         /*
984          * We reserve enough space to write the entire attribute buffer at once.
985          * In the worst-case, this would be
986          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
987          *          = 36 bytes, plus any contribution from variable-length fields
988          *            such as owner/group.
989          */
990         len = 16;
991
992         /* Sigh */
993         if (iap->ia_valid & ATTR_SIZE)
994                 len += 8;
995         if (iap->ia_valid & ATTR_MODE)
996                 len += 4;
997         if (iap->ia_valid & ATTR_UID) {
998                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
999                 if (owner_namelen < 0) {
1000                         dprintk("nfs: couldn't resolve uid %d to string\n",
1001                                         from_kuid(&init_user_ns, iap->ia_uid));
1002                         /* XXX */
1003                         strcpy(owner_name, "nobody");
1004                         owner_namelen = sizeof("nobody") - 1;
1005                         /* goto out; */
1006                 }
1007                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1008         }
1009         if (iap->ia_valid & ATTR_GID) {
1010                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1011                 if (owner_grouplen < 0) {
1012                         dprintk("nfs: couldn't resolve gid %d to string\n",
1013                                         from_kgid(&init_user_ns, iap->ia_gid));
1014                         strcpy(owner_group, "nobody");
1015                         owner_grouplen = sizeof("nobody") - 1;
1016                         /* goto out; */
1017                 }
1018                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1019         }
1020         if (iap->ia_valid & ATTR_ATIME_SET)
1021                 len += 16;
1022         else if (iap->ia_valid & ATTR_ATIME)
1023                 len += 4;
1024         if (iap->ia_valid & ATTR_MTIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_MTIME)
1027                 len += 4;
1028         p = reserve_space(xdr, len);
1029
1030         /*
1031          * We write the bitmap length now, but leave the bitmap and the attribute
1032          * buffer length to be backfilled at the end of this routine.
1033          */
1034         *p++ = cpu_to_be32(2);
1035         q = p;
1036         p += 3;
1037
1038         if (iap->ia_valid & ATTR_SIZE) {
1039                 bmval0 |= FATTR4_WORD0_SIZE;
1040                 p = xdr_encode_hyper(p, iap->ia_size);
1041         }
1042         if (iap->ia_valid & ATTR_MODE) {
1043                 bmval1 |= FATTR4_WORD1_MODE;
1044                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1045         }
1046         if (iap->ia_valid & ATTR_UID) {
1047                 bmval1 |= FATTR4_WORD1_OWNER;
1048                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1049         }
1050         if (iap->ia_valid & ATTR_GID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1052                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1053         }
1054         if (iap->ia_valid & ATTR_ATIME_SET) {
1055                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1057                 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1058                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1059         }
1060         else if (iap->ia_valid & ATTR_ATIME) {
1061                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1062                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1063         }
1064         if (iap->ia_valid & ATTR_MTIME_SET) {
1065                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1066                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1067                 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1068                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1069         }
1070         else if (iap->ia_valid & ATTR_MTIME) {
1071                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1072                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1073         }
1074
1075         /*
1076          * Now we backfill the bitmap and the attribute buffer length.
1077          */
1078         if (len != ((char *)p - (char *)q) + 4) {
1079                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1080                                 len, ((char *)p - (char *)q) + 4);
1081                 BUG();
1082         }
1083         len = (char *)p - (char *)q - 12;
1084         *q++ = htonl(bmval0);
1085         *q++ = htonl(bmval1);
1086         *q = htonl(len);
1087
1088 /* out: */
1089 }
1090
1091 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1092 {
1093         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1094         encode_uint32(xdr, access);
1095 }
1096
1097 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1098 {
1099         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1100         encode_nfs4_seqid(xdr, arg->seqid);
1101         encode_nfs4_stateid(xdr, arg->stateid);
1102 }
1103
1104 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1105 {
1106         __be32 *p;
1107
1108         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1109         p = reserve_space(xdr, 12);
1110         p = xdr_encode_hyper(p, args->offset);
1111         *p = cpu_to_be32(args->count);
1112 }
1113
1114 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1115 {
1116         __be32 *p;
1117
1118         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1119         encode_uint32(xdr, create->ftype);
1120
1121         switch (create->ftype) {
1122         case NF4LNK:
1123                 p = reserve_space(xdr, 4);
1124                 *p = cpu_to_be32(create->u.symlink.len);
1125                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1126                 break;
1127
1128         case NF4BLK: case NF4CHR:
1129                 p = reserve_space(xdr, 8);
1130                 *p++ = cpu_to_be32(create->u.device.specdata1);
1131                 *p = cpu_to_be32(create->u.device.specdata2);
1132                 break;
1133
1134         default:
1135                 break;
1136         }
1137
1138         encode_string(xdr, create->name->len, create->name->name);
1139         encode_attrs(xdr, create->attrs, create->server);
1140 }
1141
1142 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1143 {
1144         __be32 *p;
1145
1146         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1147         p = reserve_space(xdr, 8);
1148         *p++ = cpu_to_be32(1);
1149         *p = cpu_to_be32(bitmap);
1150 }
1151
1152 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1153 {
1154         __be32 *p;
1155
1156         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1157         p = reserve_space(xdr, 12);
1158         *p++ = cpu_to_be32(2);
1159         *p++ = cpu_to_be32(bm0);
1160         *p = cpu_to_be32(bm1);
1161 }
1162
1163 static void
1164 encode_getattr_three(struct xdr_stream *xdr,
1165                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1166                      struct compound_hdr *hdr)
1167 {
1168         __be32 *p;
1169
1170         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1171         if (bm2) {
1172                 p = reserve_space(xdr, 16);
1173                 *p++ = cpu_to_be32(3);
1174                 *p++ = cpu_to_be32(bm0);
1175                 *p++ = cpu_to_be32(bm1);
1176                 *p = cpu_to_be32(bm2);
1177         } else if (bm1) {
1178                 p = reserve_space(xdr, 12);
1179                 *p++ = cpu_to_be32(2);
1180                 *p++ = cpu_to_be32(bm0);
1181                 *p = cpu_to_be32(bm1);
1182         } else {
1183                 p = reserve_space(xdr, 8);
1184                 *p++ = cpu_to_be32(1);
1185                 *p = cpu_to_be32(bm0);
1186         }
1187 }
1188
1189 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1190 {
1191         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1192                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1193 }
1194
1195 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1196                                  const u32 *open_bitmap,
1197                                  struct compound_hdr *hdr)
1198 {
1199         encode_getattr_three(xdr,
1200                              bitmask[0] & open_bitmap[0],
1201                              bitmask[1] & open_bitmap[1],
1202                              bitmask[2] & open_bitmap[2],
1203                              hdr);
1204 }
1205
1206 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1207 {
1208         encode_getattr_three(xdr,
1209                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1210                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1211                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1212                              hdr);
1213 }
1214
1215 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1216 {
1217         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1218                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1219 }
1220
1221 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1222 {
1223         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1224 }
1225
1226 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1227 {
1228         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1229         encode_string(xdr, name->len, name->name);
1230 }
1231
1232 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1233 {
1234         if (fl->fl_type == F_RDLCK)
1235                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1236         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1237 }
1238
1239 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1240 {
1241         if (fl->fl_end == OFFSET_MAX)
1242                 return ~(uint64_t)0;
1243         return fl->fl_end - fl->fl_start + 1;
1244 }
1245
1246 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1247 {
1248         __be32 *p;
1249
1250         p = reserve_space(xdr, 32);
1251         p = xdr_encode_hyper(p, lowner->clientid);
1252         *p++ = cpu_to_be32(20);
1253         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1254         *p++ = cpu_to_be32(lowner->s_dev);
1255         xdr_encode_hyper(p, lowner->id);
1256 }
1257
1258 /*
1259  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1260  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1261  */
1262 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1263 {
1264         __be32 *p;
1265
1266         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1267         p = reserve_space(xdr, 28);
1268         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1269         *p++ = cpu_to_be32(args->reclaim);
1270         p = xdr_encode_hyper(p, args->fl->fl_start);
1271         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1272         *p = cpu_to_be32(args->new_lock_owner);
1273         if (args->new_lock_owner){
1274                 encode_nfs4_seqid(xdr, args->open_seqid);
1275                 encode_nfs4_stateid(xdr, args->open_stateid);
1276                 encode_nfs4_seqid(xdr, args->lock_seqid);
1277                 encode_lockowner(xdr, &args->lock_owner);
1278         }
1279         else {
1280                 encode_nfs4_stateid(xdr, args->lock_stateid);
1281                 encode_nfs4_seqid(xdr, args->lock_seqid);
1282         }
1283 }
1284
1285 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1286 {
1287         __be32 *p;
1288
1289         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1290         p = reserve_space(xdr, 20);
1291         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1292         p = xdr_encode_hyper(p, args->fl->fl_start);
1293         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1294         encode_lockowner(xdr, &args->lock_owner);
1295 }
1296
1297 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1298 {
1299         __be32 *p;
1300
1301         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1302         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1303         encode_nfs4_seqid(xdr, args->seqid);
1304         encode_nfs4_stateid(xdr, args->stateid);
1305         p = reserve_space(xdr, 16);
1306         p = xdr_encode_hyper(p, args->fl->fl_start);
1307         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1308 }
1309
1310 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1311 {
1312         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1313         encode_lockowner(xdr, lowner);
1314 }
1315
1316 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1317 {
1318         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1319         encode_string(xdr, name->len, name->name);
1320 }
1321
1322 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1323 {
1324         __be32 *p;
1325
1326         p = reserve_space(xdr, 8);
1327         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1328         case FMODE_READ:
1329                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1330                 break;
1331         case FMODE_WRITE:
1332                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1333                 break;
1334         case FMODE_READ|FMODE_WRITE:
1335                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1336                 break;
1337         default:
1338                 *p++ = cpu_to_be32(0);
1339         }
1340         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1341 }
1342
1343 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1344 {
1345         __be32 *p;
1346  /*
1347  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1348  * owner 4 = 32
1349  */
1350         encode_nfs4_seqid(xdr, arg->seqid);
1351         encode_share_access(xdr, arg->fmode);
1352         p = reserve_space(xdr, 36);
1353         p = xdr_encode_hyper(p, arg->clientid);
1354         *p++ = cpu_to_be32(24);
1355         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1356         *p++ = cpu_to_be32(arg->server->s_dev);
1357         *p++ = cpu_to_be32(arg->id.uniquifier);
1358         xdr_encode_hyper(p, arg->id.create_time);
1359 }
1360
1361 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1362 {
1363         struct iattr dummy;
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 4);
1367         switch(arg->createmode) {
1368         case NFS4_CREATE_UNCHECKED:
1369                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1370                 encode_attrs(xdr, arg->u.attrs, arg->server);
1371                 break;
1372         case NFS4_CREATE_GUARDED:
1373                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1374                 encode_attrs(xdr, arg->u.attrs, arg->server);
1375                 break;
1376         case NFS4_CREATE_EXCLUSIVE:
1377                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1378                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1379                 break;
1380         case NFS4_CREATE_EXCLUSIVE4_1:
1381                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1382                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1383                 dummy.ia_valid = 0;
1384                 encode_attrs(xdr, &dummy, arg->server);
1385         }
1386 }
1387
1388 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389 {
1390         __be32 *p;
1391
1392         p = reserve_space(xdr, 4);
1393         switch (arg->open_flags & O_CREAT) {
1394         case 0:
1395                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1396                 break;
1397         default:
1398                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1399                 encode_createmode(xdr, arg);
1400         }
1401 }
1402
1403 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1404 {
1405         __be32 *p;
1406
1407         p = reserve_space(xdr, 4);
1408         switch (delegation_type) {
1409         case 0:
1410                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1411                 break;
1412         case FMODE_READ:
1413                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1414                 break;
1415         case FMODE_WRITE|FMODE_READ:
1416                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1417                 break;
1418         default:
1419                 BUG();
1420         }
1421 }
1422
1423 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1424 {
1425         __be32 *p;
1426
1427         p = reserve_space(xdr, 4);
1428         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1429         encode_string(xdr, name->len, name->name);
1430 }
1431
1432 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1433 {
1434         __be32 *p;
1435
1436         p = reserve_space(xdr, 4);
1437         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1438         encode_delegation_type(xdr, type);
1439 }
1440
1441 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1442 {
1443         __be32 *p;
1444
1445         p = reserve_space(xdr, 4);
1446         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1447         encode_nfs4_stateid(xdr, stateid);
1448         encode_string(xdr, name->len, name->name);
1449 }
1450
1451 static inline void encode_claim_fh(struct xdr_stream *xdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4);
1456         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1457 }
1458
1459 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1460 {
1461         __be32 *p;
1462
1463         p = reserve_space(xdr, 4);
1464         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1465         encode_nfs4_stateid(xdr, stateid);
1466 }
1467
1468 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1469 {
1470         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1471         encode_openhdr(xdr, arg);
1472         encode_opentype(xdr, arg);
1473         switch (arg->claim) {
1474         case NFS4_OPEN_CLAIM_NULL:
1475                 encode_claim_null(xdr, arg->name);
1476                 break;
1477         case NFS4_OPEN_CLAIM_PREVIOUS:
1478                 encode_claim_previous(xdr, arg->u.delegation_type);
1479                 break;
1480         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1481                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1482                 break;
1483         case NFS4_OPEN_CLAIM_FH:
1484                 encode_claim_fh(xdr);
1485                 break;
1486         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1487                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1488                 break;
1489         default:
1490                 BUG();
1491         }
1492 }
1493
1494 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1495 {
1496         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1497         encode_nfs4_stateid(xdr, arg->stateid);
1498         encode_nfs4_seqid(xdr, arg->seqid);
1499 }
1500
1501 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1502 {
1503         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1504         encode_nfs4_stateid(xdr, arg->stateid);
1505         encode_nfs4_seqid(xdr, arg->seqid);
1506         encode_share_access(xdr, arg->fmode);
1507 }
1508
1509 static void
1510 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1511 {
1512         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1513         encode_string(xdr, fh->size, fh->data);
1514 }
1515
1516 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1517 {
1518         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1519 }
1520
1521 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1522 {
1523         __be32 *p;
1524
1525         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1526         encode_nfs4_stateid(xdr, &args->stateid);
1527
1528         p = reserve_space(xdr, 12);
1529         p = xdr_encode_hyper(p, args->offset);
1530         *p = cpu_to_be32(args->count);
1531 }
1532
1533 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1534 {
1535         uint32_t attrs[2] = {
1536                 FATTR4_WORD0_RDATTR_ERROR,
1537                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1538         };
1539         uint32_t dircount = readdir->count >> 1;
1540         __be32 *p, verf[2];
1541
1542         if (readdir->plus) {
1543                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1544                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1545                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1546                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1547                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1548                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1549                 dircount >>= 1;
1550         }
1551         /* Use mounted_on_fileid only if the server supports it */
1552         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1553                 attrs[0] |= FATTR4_WORD0_FILEID;
1554
1555         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1556         encode_uint64(xdr, readdir->cookie);
1557         encode_nfs4_verifier(xdr, &readdir->verifier);
1558         p = reserve_space(xdr, 20);
1559         *p++ = cpu_to_be32(dircount);
1560         *p++ = cpu_to_be32(readdir->count);
1561         *p++ = cpu_to_be32(2);
1562
1563         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1564         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1565         memcpy(verf, readdir->verifier.data, sizeof(verf));
1566         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1567                         __func__,
1568                         (unsigned long long)readdir->cookie,
1569                         verf[0], verf[1],
1570                         attrs[0] & readdir->bitmask[0],
1571                         attrs[1] & readdir->bitmask[1]);
1572 }
1573
1574 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1575 {
1576         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1577 }
1578
1579 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1580 {
1581         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1582         encode_string(xdr, name->len, name->name);
1583 }
1584
1585 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1588         encode_string(xdr, oldname->len, oldname->name);
1589         encode_string(xdr, newname->len, newname->name);
1590 }
1591
1592 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1593                          struct compound_hdr *hdr)
1594 {
1595         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1596         encode_uint64(xdr, clid);
1597 }
1598
1599 static void
1600 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1601 {
1602         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1603 }
1604
1605 static void
1606 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1607 {
1608         __be32 *p;
1609
1610         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1611         encode_nfs4_stateid(xdr, &zero_stateid);
1612         p = reserve_space(xdr, 2*4);
1613         *p++ = cpu_to_be32(1);
1614         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1615         p = reserve_space(xdr, 4);
1616         *p = cpu_to_be32(arg->acl_len);
1617         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1618 }
1619
1620 static void
1621 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1622 {
1623         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1624 }
1625
1626 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1627 {
1628         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1629         encode_nfs4_stateid(xdr, &arg->stateid);
1630         encode_attrs(xdr, arg->iap, server);
1631 }
1632
1633 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1634 {
1635         __be32 *p;
1636
1637         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1638         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1639
1640         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1641         p = reserve_space(xdr, 4);
1642         *p = cpu_to_be32(setclientid->sc_prog);
1643         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1644         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1645         p = reserve_space(xdr, 4);
1646         *p = cpu_to_be32(setclientid->sc_cb_ident);
1647 }
1648
1649 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1650 {
1651         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1652                         decode_setclientid_confirm_maxsz, hdr);
1653         encode_uint64(xdr, arg->clientid);
1654         encode_nfs4_verifier(xdr, &arg->confirm);
1655 }
1656
1657 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1658 {
1659         __be32 *p;
1660
1661         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1662         encode_nfs4_stateid(xdr, &args->stateid);
1663
1664         p = reserve_space(xdr, 16);
1665         p = xdr_encode_hyper(p, args->offset);
1666         *p++ = cpu_to_be32(args->stable);
1667         *p = cpu_to_be32(args->count);
1668
1669         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1670 }
1671
1672 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1673 {
1674         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1675         encode_nfs4_stateid(xdr, stateid);
1676 }
1677
1678 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1679 {
1680         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1681         encode_string(xdr, name->len, name->name);
1682 }
1683
1684 #if defined(CONFIG_NFS_V4_1)
1685 /* NFSv4.1 operations */
1686 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1687                                    struct nfs4_session *session,
1688                                    struct compound_hdr *hdr)
1689 {
1690         __be32 *p;
1691
1692         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1693                 decode_bind_conn_to_session_maxsz, hdr);
1694         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1695         p = xdr_reserve_space(xdr, 8);
1696         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1697         *p = 0; /* use_conn_in_rdma_mode = False */
1698 }
1699
1700 static void encode_exchange_id(struct xdr_stream *xdr,
1701                                struct nfs41_exchange_id_args *args,
1702                                struct compound_hdr *hdr)
1703 {
1704         __be32 *p;
1705         char impl_name[IMPL_NAME_LIMIT];
1706         int len = 0;
1707
1708         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1709         encode_nfs4_verifier(xdr, args->verifier);
1710
1711         encode_string(xdr, args->id_len, args->id);
1712
1713         p = reserve_space(xdr, 12);
1714         *p++ = cpu_to_be32(args->flags);
1715         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1716
1717         if (send_implementation_id &&
1718             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1719             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1720                 <= sizeof(impl_name) + 1)
1721                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1722                                utsname()->sysname, utsname()->release,
1723                                utsname()->version, utsname()->machine);
1724
1725         if (len > 0) {
1726                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1727
1728                 encode_string(xdr,
1729                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1730                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1731                 encode_string(xdr, len, impl_name);
1732                 /* just send zeros for nii_date - the date is in nii_name */
1733                 p = reserve_space(xdr, 12);
1734                 p = xdr_encode_hyper(p, 0);
1735                 *p = cpu_to_be32(0);
1736         } else
1737                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1738 }
1739
1740 static void encode_create_session(struct xdr_stream *xdr,
1741                                   struct nfs41_create_session_args *args,
1742                                   struct compound_hdr *hdr)
1743 {
1744         __be32 *p;
1745         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1746         uint32_t len;
1747         struct nfs_client *clp = args->client;
1748         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1749         u32 max_resp_sz_cached;
1750
1751         /*
1752          * Assumes OPEN is the biggest non-idempotent compound.
1753          * 2 is the verifier.
1754          */
1755         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1756                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1757
1758         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1759                         clp->cl_ipaddr);
1760
1761         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1762         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1763         p = xdr_encode_hyper(p, clp->cl_clientid);
1764         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1765         *p++ = cpu_to_be32(args->flags);                        /*flags */
1766
1767         /* Fore Channel */
1768         *p++ = cpu_to_be32(0);                          /* header padding size */
1769         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1770         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1771         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1772         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1773         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1774         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1775
1776         /* Back Channel */
1777         *p++ = cpu_to_be32(0);                          /* header padding size */
1778         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1779         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1780         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1781         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1782         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1783         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1784
1785         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1786         *p++ = cpu_to_be32(1);
1787         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1788
1789         /* authsys_parms rfc1831 */
1790         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1791         p = xdr_encode_opaque(p, machine_name, len);
1792         *p++ = cpu_to_be32(0);                          /* UID */
1793         *p++ = cpu_to_be32(0);                          /* GID */
1794         *p = cpu_to_be32(0);                            /* No more gids */
1795 }
1796
1797 static void encode_destroy_session(struct xdr_stream *xdr,
1798                                    struct nfs4_session *session,
1799                                    struct compound_hdr *hdr)
1800 {
1801         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1802         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1803 }
1804
1805 static void encode_destroy_clientid(struct xdr_stream *xdr,
1806                                    uint64_t clientid,
1807                                    struct compound_hdr *hdr)
1808 {
1809         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1810         encode_uint64(xdr, clientid);
1811 }
1812
1813 static void encode_reclaim_complete(struct xdr_stream *xdr,
1814                                     struct nfs41_reclaim_complete_args *args,
1815                                     struct compound_hdr *hdr)
1816 {
1817         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1818         encode_uint32(xdr, args->one_fs);
1819 }
1820 #endif /* CONFIG_NFS_V4_1 */
1821
1822 static void encode_sequence(struct xdr_stream *xdr,
1823                             const struct nfs4_sequence_args *args,
1824                             struct compound_hdr *hdr)
1825 {
1826 #if defined(CONFIG_NFS_V4_1)
1827         struct nfs4_session *session;
1828         struct nfs4_slot_table *tp;
1829         struct nfs4_slot *slot = args->sa_slot;
1830         __be32 *p;
1831
1832         if (slot == NULL)
1833                 return;
1834
1835         tp = slot->table;
1836         session = tp->session;
1837
1838         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1839
1840         /*
1841          * Sessionid + seqid + slotid + max slotid + cache_this
1842          */
1843         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1844                 "max_slotid=%d cache_this=%d\n",
1845                 __func__,
1846                 ((u32 *)session->sess_id.data)[0],
1847                 ((u32 *)session->sess_id.data)[1],
1848                 ((u32 *)session->sess_id.data)[2],
1849                 ((u32 *)session->sess_id.data)[3],
1850                 slot->seq_nr, slot->slot_nr,
1851                 tp->highest_used_slotid, args->sa_cache_this);
1852         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1853         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1854         *p++ = cpu_to_be32(slot->seq_nr);
1855         *p++ = cpu_to_be32(slot->slot_nr);
1856         *p++ = cpu_to_be32(tp->highest_used_slotid);
1857         *p = cpu_to_be32(args->sa_cache_this);
1858 #endif /* CONFIG_NFS_V4_1 */
1859 }
1860
1861 #ifdef CONFIG_NFS_V4_1
1862 static void
1863 encode_getdevicelist(struct xdr_stream *xdr,
1864                      const struct nfs4_getdevicelist_args *args,
1865                      struct compound_hdr *hdr)
1866 {
1867         __be32 *p;
1868         nfs4_verifier dummy = {
1869                 .data = "dummmmmy",
1870         };
1871
1872         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1873         p = reserve_space(xdr, 16);
1874         *p++ = cpu_to_be32(args->layoutclass);
1875         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1876         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1877         encode_nfs4_verifier(xdr, &dummy);
1878 }
1879
1880 static void
1881 encode_getdeviceinfo(struct xdr_stream *xdr,
1882                      const struct nfs4_getdeviceinfo_args *args,
1883                      struct compound_hdr *hdr)
1884 {
1885         __be32 *p;
1886
1887         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1888         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1889         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1890                                     NFS4_DEVICEID4_SIZE);
1891         *p++ = cpu_to_be32(args->pdev->layout_type);
1892         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1893         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1894 }
1895
1896 static void
1897 encode_layoutget(struct xdr_stream *xdr,
1898                       const struct nfs4_layoutget_args *args,
1899                       struct compound_hdr *hdr)
1900 {
1901         __be32 *p;
1902
1903         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1904         p = reserve_space(xdr, 36);
1905         *p++ = cpu_to_be32(0);     /* Signal layout available */
1906         *p++ = cpu_to_be32(args->type);
1907         *p++ = cpu_to_be32(args->range.iomode);
1908         p = xdr_encode_hyper(p, args->range.offset);
1909         p = xdr_encode_hyper(p, args->range.length);
1910         p = xdr_encode_hyper(p, args->minlength);
1911         encode_nfs4_stateid(xdr, &args->stateid);
1912         encode_uint32(xdr, args->maxcount);
1913
1914         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1915                 __func__,
1916                 args->type,
1917                 args->range.iomode,
1918                 (unsigned long)args->range.offset,
1919                 (unsigned long)args->range.length,
1920                 args->maxcount);
1921 }
1922
1923 static int
1924 encode_layoutcommit(struct xdr_stream *xdr,
1925                     struct inode *inode,
1926                     const struct nfs4_layoutcommit_args *args,
1927                     struct compound_hdr *hdr)
1928 {
1929         __be32 *p;
1930
1931         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1932                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1933
1934         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1935         p = reserve_space(xdr, 20);
1936         /* Only whole file layouts */
1937         p = xdr_encode_hyper(p, 0); /* offset */
1938         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1939         *p = cpu_to_be32(0); /* reclaim */
1940         encode_nfs4_stateid(xdr, &args->stateid);
1941         p = reserve_space(xdr, 20);
1942         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1943         p = xdr_encode_hyper(p, args->lastbytewritten);
1944         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1945         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1946
1947         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1948                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1949                         NFS_I(inode)->layout, xdr, args);
1950         else
1951                 encode_uint32(xdr, 0); /* no layout-type payload */
1952
1953         return 0;
1954 }
1955
1956 static void
1957 encode_layoutreturn(struct xdr_stream *xdr,
1958                     const struct nfs4_layoutreturn_args *args,
1959                     struct compound_hdr *hdr)
1960 {
1961         __be32 *p;
1962
1963         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1964         p = reserve_space(xdr, 16);
1965         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1966         *p++ = cpu_to_be32(args->layout_type);
1967         *p++ = cpu_to_be32(IOMODE_ANY);
1968         *p = cpu_to_be32(RETURN_FILE);
1969         p = reserve_space(xdr, 16);
1970         p = xdr_encode_hyper(p, 0);
1971         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1972         spin_lock(&args->inode->i_lock);
1973         encode_nfs4_stateid(xdr, &args->stateid);
1974         spin_unlock(&args->inode->i_lock);
1975         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1976                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1977                         NFS_I(args->inode)->layout, xdr, args);
1978         } else
1979                 encode_uint32(xdr, 0);
1980 }
1981
1982 static int
1983 encode_secinfo_no_name(struct xdr_stream *xdr,
1984                        const struct nfs41_secinfo_no_name_args *args,
1985                        struct compound_hdr *hdr)
1986 {
1987         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1988         encode_uint32(xdr, args->style);
1989         return 0;
1990 }
1991
1992 static void encode_test_stateid(struct xdr_stream *xdr,
1993                                 struct nfs41_test_stateid_args *args,
1994                                 struct compound_hdr *hdr)
1995 {
1996         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
1997         encode_uint32(xdr, 1);
1998         encode_nfs4_stateid(xdr, args->stateid);
1999 }
2000
2001 static void encode_free_stateid(struct xdr_stream *xdr,
2002                                 struct nfs41_free_stateid_args *args,
2003                                 struct compound_hdr *hdr)
2004 {
2005         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2006         encode_nfs4_stateid(xdr, &args->stateid);
2007 }
2008 #endif /* CONFIG_NFS_V4_1 */
2009
2010 /*
2011  * END OF "GENERIC" ENCODE ROUTINES.
2012  */
2013
2014 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2015 {
2016 #if defined(CONFIG_NFS_V4_1)
2017
2018         if (args->sa_slot)
2019                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2020 #endif /* CONFIG_NFS_V4_1 */
2021         return 0;
2022 }
2023
2024 /*
2025  * Encode an ACCESS request
2026  */
2027 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2028                                 const struct nfs4_accessargs *args)
2029 {
2030         struct compound_hdr hdr = {
2031                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2032         };
2033
2034         encode_compound_hdr(xdr, req, &hdr);
2035         encode_sequence(xdr, &args->seq_args, &hdr);
2036         encode_putfh(xdr, args->fh, &hdr);
2037         encode_access(xdr, args->access, &hdr);
2038         encode_getfattr(xdr, args->bitmask, &hdr);
2039         encode_nops(&hdr);
2040 }
2041
2042 /*
2043  * Encode LOOKUP request
2044  */
2045 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2046                                 const struct nfs4_lookup_arg *args)
2047 {
2048         struct compound_hdr hdr = {
2049                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2050         };
2051
2052         encode_compound_hdr(xdr, req, &hdr);
2053         encode_sequence(xdr, &args->seq_args, &hdr);
2054         encode_putfh(xdr, args->dir_fh, &hdr);
2055         encode_lookup(xdr, args->name, &hdr);
2056         encode_getfh(xdr, &hdr);
2057         encode_getfattr(xdr, args->bitmask, &hdr);
2058         encode_nops(&hdr);
2059 }
2060
2061 /*
2062  * Encode LOOKUP_ROOT request
2063  */
2064 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2065                                      struct xdr_stream *xdr,
2066                                      const struct nfs4_lookup_root_arg *args)
2067 {
2068         struct compound_hdr hdr = {
2069                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070         };
2071
2072         encode_compound_hdr(xdr, req, &hdr);
2073         encode_sequence(xdr, &args->seq_args, &hdr);
2074         encode_putrootfh(xdr, &hdr);
2075         encode_getfh(xdr, &hdr);
2076         encode_getfattr(xdr, args->bitmask, &hdr);
2077         encode_nops(&hdr);
2078 }
2079
2080 /*
2081  * Encode REMOVE request
2082  */
2083 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2084                                 const struct nfs_removeargs *args)
2085 {
2086         struct compound_hdr hdr = {
2087                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2088         };
2089
2090         encode_compound_hdr(xdr, req, &hdr);
2091         encode_sequence(xdr, &args->seq_args, &hdr);
2092         encode_putfh(xdr, args->fh, &hdr);
2093         encode_remove(xdr, &args->name, &hdr);
2094         encode_nops(&hdr);
2095 }
2096
2097 /*
2098  * Encode RENAME request
2099  */
2100 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2101                                 const struct nfs_renameargs *args)
2102 {
2103         struct compound_hdr hdr = {
2104                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105         };
2106
2107         encode_compound_hdr(xdr, req, &hdr);
2108         encode_sequence(xdr, &args->seq_args, &hdr);
2109         encode_putfh(xdr, args->old_dir, &hdr);
2110         encode_savefh(xdr, &hdr);
2111         encode_putfh(xdr, args->new_dir, &hdr);
2112         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2113         encode_nops(&hdr);
2114 }
2115
2116 /*
2117  * Encode LINK request
2118  */
2119 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2120                              const struct nfs4_link_arg *args)
2121 {
2122         struct compound_hdr hdr = {
2123                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2124         };
2125
2126         encode_compound_hdr(xdr, req, &hdr);
2127         encode_sequence(xdr, &args->seq_args, &hdr);
2128         encode_putfh(xdr, args->fh, &hdr);
2129         encode_savefh(xdr, &hdr);
2130         encode_putfh(xdr, args->dir_fh, &hdr);
2131         encode_link(xdr, args->name, &hdr);
2132         encode_restorefh(xdr, &hdr);
2133         encode_getfattr(xdr, args->bitmask, &hdr);
2134         encode_nops(&hdr);
2135 }
2136
2137 /*
2138  * Encode CREATE request
2139  */
2140 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2141                                 const struct nfs4_create_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putfh(xdr, args->dir_fh, &hdr);
2150         encode_create(xdr, args, &hdr);
2151         encode_getfh(xdr, &hdr);
2152         encode_getfattr(xdr, args->bitmask, &hdr);
2153         encode_nops(&hdr);
2154 }
2155
2156 /*
2157  * Encode SYMLINK request
2158  */
2159 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2160                                  const struct nfs4_create_arg *args)
2161 {
2162         nfs4_xdr_enc_create(req, xdr, args);
2163 }
2164
2165 /*
2166  * Encode GETATTR request
2167  */
2168 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                  const struct nfs4_getattr_arg *args)
2170 {
2171         struct compound_hdr hdr = {
2172                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173         };
2174
2175         encode_compound_hdr(xdr, req, &hdr);
2176         encode_sequence(xdr, &args->seq_args, &hdr);
2177         encode_putfh(xdr, args->fh, &hdr);
2178         encode_getfattr(xdr, args->bitmask, &hdr);
2179         encode_nops(&hdr);
2180 }
2181
2182 /*
2183  * Encode a CLOSE request
2184  */
2185 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                                struct nfs_closeargs *args)
2187 {
2188         struct compound_hdr hdr = {
2189                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190         };
2191
2192         encode_compound_hdr(xdr, req, &hdr);
2193         encode_sequence(xdr, &args->seq_args, &hdr);
2194         encode_putfh(xdr, args->fh, &hdr);
2195         encode_close(xdr, args, &hdr);
2196         encode_getfattr(xdr, args->bitmask, &hdr);
2197         encode_nops(&hdr);
2198 }
2199
2200 /*
2201  * Encode an OPEN request
2202  */
2203 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2204                               struct nfs_openargs *args)
2205 {
2206         struct compound_hdr hdr = {
2207                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2208         };
2209
2210         encode_compound_hdr(xdr, req, &hdr);
2211         encode_sequence(xdr, &args->seq_args, &hdr);
2212         encode_putfh(xdr, args->fh, &hdr);
2213         encode_open(xdr, args, &hdr);
2214         encode_getfh(xdr, &hdr);
2215         if (args->access)
2216                 encode_access(xdr, args->access, &hdr);
2217         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2218         encode_nops(&hdr);
2219 }
2220
2221 /*
2222  * Encode an OPEN_CONFIRM request
2223  */
2224 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2225                                       struct xdr_stream *xdr,
2226                                       struct nfs_open_confirmargs *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .nops   = 0,
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_putfh(xdr, args->fh, &hdr);
2234         encode_open_confirm(xdr, args, &hdr);
2235         encode_nops(&hdr);
2236 }
2237
2238 /*
2239  * Encode an OPEN request with no attributes.
2240  */
2241 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2242                                      struct xdr_stream *xdr,
2243                                      struct nfs_openargs *args)
2244 {
2245         struct compound_hdr hdr = {
2246                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247         };
2248
2249         encode_compound_hdr(xdr, req, &hdr);
2250         encode_sequence(xdr, &args->seq_args, &hdr);
2251         encode_putfh(xdr, args->fh, &hdr);
2252         encode_open(xdr, args, &hdr);
2253         if (args->access)
2254                 encode_access(xdr, args->access, &hdr);
2255         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2256         encode_nops(&hdr);
2257 }
2258
2259 /*
2260  * Encode an OPEN_DOWNGRADE request
2261  */
2262 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2263                                         struct xdr_stream *xdr,
2264                                         struct nfs_closeargs *args)
2265 {
2266         struct compound_hdr hdr = {
2267                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2268         };
2269
2270         encode_compound_hdr(xdr, req, &hdr);
2271         encode_sequence(xdr, &args->seq_args, &hdr);
2272         encode_putfh(xdr, args->fh, &hdr);
2273         encode_open_downgrade(xdr, args, &hdr);
2274         encode_getfattr(xdr, args->bitmask, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  * Encode a LOCK request
2280  */
2281 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2282                               struct nfs_lock_args *args)
2283 {
2284         struct compound_hdr hdr = {
2285                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286         };
2287
2288         encode_compound_hdr(xdr, req, &hdr);
2289         encode_sequence(xdr, &args->seq_args, &hdr);
2290         encode_putfh(xdr, args->fh, &hdr);
2291         encode_lock(xdr, args, &hdr);
2292         encode_nops(&hdr);
2293 }
2294
2295 /*
2296  * Encode a LOCKT request
2297  */
2298 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2299                                struct nfs_lockt_args *args)
2300 {
2301         struct compound_hdr hdr = {
2302                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303         };
2304
2305         encode_compound_hdr(xdr, req, &hdr);
2306         encode_sequence(xdr, &args->seq_args, &hdr);
2307         encode_putfh(xdr, args->fh, &hdr);
2308         encode_lockt(xdr, args, &hdr);
2309         encode_nops(&hdr);
2310 }
2311
2312 /*
2313  * Encode a LOCKU request
2314  */
2315 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2316                                struct nfs_locku_args *args)
2317 {
2318         struct compound_hdr hdr = {
2319                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2320         };
2321
2322         encode_compound_hdr(xdr, req, &hdr);
2323         encode_sequence(xdr, &args->seq_args, &hdr);
2324         encode_putfh(xdr, args->fh, &hdr);
2325         encode_locku(xdr, args, &hdr);
2326         encode_nops(&hdr);
2327 }
2328
2329 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2330                                            struct xdr_stream *xdr,
2331                                         struct nfs_release_lockowner_args *args)
2332 {
2333         struct compound_hdr hdr = {
2334                 .minorversion = 0,
2335         };
2336
2337         encode_compound_hdr(xdr, req, &hdr);
2338         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2339         encode_nops(&hdr);
2340 }
2341
2342 /*
2343  * Encode a READLINK request
2344  */
2345 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2346                                   const struct nfs4_readlink *args)
2347 {
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_readlink(xdr, args, req, &hdr);
2356
2357         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2358                         args->pgbase, args->pglen);
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode a READDIR request
2364  */
2365 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2366                                  const struct nfs4_readdir_arg *args)
2367 {
2368         struct compound_hdr hdr = {
2369                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2370         };
2371
2372         encode_compound_hdr(xdr, req, &hdr);
2373         encode_sequence(xdr, &args->seq_args, &hdr);
2374         encode_putfh(xdr, args->fh, &hdr);
2375         encode_readdir(xdr, args, req, &hdr);
2376
2377         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2378                          args->pgbase, args->count);
2379         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2380                         __func__, hdr.replen << 2, args->pages,
2381                         args->pgbase, args->count);
2382         encode_nops(&hdr);
2383 }
2384
2385 /*
2386  * Encode a READ request
2387  */
2388 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2389                               struct nfs_readargs *args)
2390 {
2391         struct compound_hdr hdr = {
2392                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2393         };
2394
2395         encode_compound_hdr(xdr, req, &hdr);
2396         encode_sequence(xdr, &args->seq_args, &hdr);
2397         encode_putfh(xdr, args->fh, &hdr);
2398         encode_read(xdr, args, &hdr);
2399
2400         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2401                          args->pages, args->pgbase, args->count);
2402         req->rq_rcv_buf.flags |= XDRBUF_READ;
2403         encode_nops(&hdr);
2404 }
2405
2406 /*
2407  * Encode an SETATTR request
2408  */
2409 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2410                                  struct nfs_setattrargs *args)
2411 {
2412         struct compound_hdr hdr = {
2413                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2414         };
2415
2416         encode_compound_hdr(xdr, req, &hdr);
2417         encode_sequence(xdr, &args->seq_args, &hdr);
2418         encode_putfh(xdr, args->fh, &hdr);
2419         encode_setattr(xdr, args, args->server, &hdr);
2420         encode_getfattr(xdr, args->bitmask, &hdr);
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode a GETACL request
2426  */
2427 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                                 struct nfs_getaclargs *args)
2429 {
2430         struct compound_hdr hdr = {
2431                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432         };
2433         uint32_t replen;
2434
2435         encode_compound_hdr(xdr, req, &hdr);
2436         encode_sequence(xdr, &args->seq_args, &hdr);
2437         encode_putfh(xdr, args->fh, &hdr);
2438         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2439         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2440
2441         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2442                 args->acl_pages, args->acl_pgbase, args->acl_len);
2443
2444         encode_nops(&hdr);
2445 }
2446
2447 /*
2448  * Encode a WRITE request
2449  */
2450 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                                struct nfs_writeargs *args)
2452 {
2453         struct compound_hdr hdr = {
2454                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455         };
2456
2457         encode_compound_hdr(xdr, req, &hdr);
2458         encode_sequence(xdr, &args->seq_args, &hdr);
2459         encode_putfh(xdr, args->fh, &hdr);
2460         encode_write(xdr, args, &hdr);
2461         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2462         if (args->bitmask)
2463                 encode_getfattr(xdr, args->bitmask, &hdr);
2464         encode_nops(&hdr);
2465 }
2466
2467 /*
2468  *  a COMMIT request
2469  */
2470 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2471                                 struct nfs_commitargs *args)
2472 {
2473         struct compound_hdr hdr = {
2474                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475         };
2476
2477         encode_compound_hdr(xdr, req, &hdr);
2478         encode_sequence(xdr, &args->seq_args, &hdr);
2479         encode_putfh(xdr, args->fh, &hdr);
2480         encode_commit(xdr, args, &hdr);
2481         encode_nops(&hdr);
2482 }
2483
2484 /*
2485  * FSINFO request
2486  */
2487 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2488                                 struct nfs4_fsinfo_arg *args)
2489 {
2490         struct compound_hdr hdr = {
2491                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2492         };
2493
2494         encode_compound_hdr(xdr, req, &hdr);
2495         encode_sequence(xdr, &args->seq_args, &hdr);
2496         encode_putfh(xdr, args->fh, &hdr);
2497         encode_fsinfo(xdr, args->bitmask, &hdr);
2498         encode_nops(&hdr);
2499 }
2500
2501 /*
2502  * a PATHCONF request
2503  */
2504 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2505                                   const struct nfs4_pathconf_arg *args)
2506 {
2507         struct compound_hdr hdr = {
2508                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2509         };
2510
2511         encode_compound_hdr(xdr, req, &hdr);
2512         encode_sequence(xdr, &args->seq_args, &hdr);
2513         encode_putfh(xdr, args->fh, &hdr);
2514         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2515                            &hdr);
2516         encode_nops(&hdr);
2517 }
2518
2519 /*
2520  * a STATFS request
2521  */
2522 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2523                                 const struct nfs4_statfs_arg *args)
2524 {
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fh, &hdr);
2532         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2533                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2534         encode_nops(&hdr);
2535 }
2536
2537 /*
2538  * GETATTR_BITMAP request
2539  */
2540 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2541                                      struct xdr_stream *xdr,
2542                                      struct nfs4_server_caps_arg *args)
2543 {
2544         struct compound_hdr hdr = {
2545                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2546         };
2547
2548         encode_compound_hdr(xdr, req, &hdr);
2549         encode_sequence(xdr, &args->seq_args, &hdr);
2550         encode_putfh(xdr, args->fhandle, &hdr);
2551         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2552                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2553                            FATTR4_WORD0_LINK_SUPPORT|
2554                            FATTR4_WORD0_SYMLINK_SUPPORT|
2555                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2556         encode_nops(&hdr);
2557 }
2558
2559 /*
2560  * a RENEW request
2561  */
2562 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2563                                struct nfs_client *clp)
2564 {
2565         struct compound_hdr hdr = {
2566                 .nops   = 0,
2567         };
2568
2569         encode_compound_hdr(xdr, req, &hdr);
2570         encode_renew(xdr, clp->cl_clientid, &hdr);
2571         encode_nops(&hdr);
2572 }
2573
2574 /*
2575  * a SETCLIENTID request
2576  */
2577 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2578                                      struct xdr_stream *xdr,
2579                                      struct nfs4_setclientid *sc)
2580 {
2581         struct compound_hdr hdr = {
2582                 .nops   = 0,
2583         };
2584
2585         encode_compound_hdr(xdr, req, &hdr);
2586         encode_setclientid(xdr, sc, &hdr);
2587         encode_nops(&hdr);
2588 }
2589
2590 /*
2591  * a SETCLIENTID_CONFIRM request
2592  */
2593 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2594                                              struct xdr_stream *xdr,
2595                                              struct nfs4_setclientid_res *arg)
2596 {
2597         struct compound_hdr hdr = {
2598                 .nops   = 0,
2599         };
2600
2601         encode_compound_hdr(xdr, req, &hdr);
2602         encode_setclientid_confirm(xdr, arg, &hdr);
2603         encode_nops(&hdr);
2604 }
2605
2606 /*
2607  * DELEGRETURN request
2608  */
2609 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2610                                      struct xdr_stream *xdr,
2611                                      const struct nfs4_delegreturnargs *args)
2612 {
2613         struct compound_hdr hdr = {
2614                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2615         };
2616
2617         encode_compound_hdr(xdr, req, &hdr);
2618         encode_sequence(xdr, &args->seq_args, &hdr);
2619         encode_putfh(xdr, args->fhandle, &hdr);
2620         encode_getfattr(xdr, args->bitmask, &hdr);
2621         encode_delegreturn(xdr, args->stateid, &hdr);
2622         encode_nops(&hdr);
2623 }
2624
2625 /*
2626  * Encode FS_LOCATIONS request
2627  */
2628 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2629                                       struct xdr_stream *xdr,
2630                                       struct nfs4_fs_locations_arg *args)
2631 {
2632         struct compound_hdr hdr = {
2633                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2634         };
2635         uint32_t replen;
2636
2637         encode_compound_hdr(xdr, req, &hdr);
2638         encode_sequence(xdr, &args->seq_args, &hdr);
2639         encode_putfh(xdr, args->dir_fh, &hdr);
2640         encode_lookup(xdr, args->name, &hdr);
2641         replen = hdr.replen;    /* get the attribute into args->page */
2642         encode_fs_locations(xdr, args->bitmask, &hdr);
2643
2644         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2645                         0, PAGE_SIZE);
2646         encode_nops(&hdr);
2647 }
2648
2649 /*
2650  * Encode SECINFO request
2651  */
2652 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2653                                 struct xdr_stream *xdr,
2654                                 struct nfs4_secinfo_arg *args)
2655 {
2656         struct compound_hdr hdr = {
2657                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2658         };
2659
2660         encode_compound_hdr(xdr, req, &hdr);
2661         encode_sequence(xdr, &args->seq_args, &hdr);
2662         encode_putfh(xdr, args->dir_fh, &hdr);
2663         encode_secinfo(xdr, args->name, &hdr);
2664         encode_nops(&hdr);
2665 }
2666
2667 #if defined(CONFIG_NFS_V4_1)
2668 /*
2669  * BIND_CONN_TO_SESSION request
2670  */
2671 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2672                                 struct xdr_stream *xdr,
2673                                 struct nfs_client *clp)
2674 {
2675         struct compound_hdr hdr = {
2676                 .minorversion = clp->cl_mvops->minor_version,
2677         };
2678
2679         encode_compound_hdr(xdr, req, &hdr);
2680         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2681         encode_nops(&hdr);
2682 }
2683
2684 /*
2685  * EXCHANGE_ID request
2686  */
2687 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2688                                      struct xdr_stream *xdr,
2689                                      struct nfs41_exchange_id_args *args)
2690 {
2691         struct compound_hdr hdr = {
2692                 .minorversion = args->client->cl_mvops->minor_version,
2693         };
2694
2695         encode_compound_hdr(xdr, req, &hdr);
2696         encode_exchange_id(xdr, args, &hdr);
2697         encode_nops(&hdr);
2698 }
2699
2700 /*
2701  * a CREATE_SESSION request
2702  */
2703 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2704                                         struct xdr_stream *xdr,
2705                                         struct nfs41_create_session_args *args)
2706 {
2707         struct compound_hdr hdr = {
2708                 .minorversion = args->client->cl_mvops->minor_version,
2709         };
2710
2711         encode_compound_hdr(xdr, req, &hdr);
2712         encode_create_session(xdr, args, &hdr);
2713         encode_nops(&hdr);
2714 }
2715
2716 /*
2717  * a DESTROY_SESSION request
2718  */
2719 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2720                                          struct xdr_stream *xdr,
2721                                          struct nfs4_session *session)
2722 {
2723         struct compound_hdr hdr = {
2724                 .minorversion = session->clp->cl_mvops->minor_version,
2725         };
2726
2727         encode_compound_hdr(xdr, req, &hdr);
2728         encode_destroy_session(xdr, session, &hdr);
2729         encode_nops(&hdr);
2730 }
2731
2732 /*
2733  * a DESTROY_CLIENTID request
2734  */
2735 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2736                                          struct xdr_stream *xdr,
2737                                          struct nfs_client *clp)
2738 {
2739         struct compound_hdr hdr = {
2740                 .minorversion = clp->cl_mvops->minor_version,
2741         };
2742
2743         encode_compound_hdr(xdr, req, &hdr);
2744         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2745         encode_nops(&hdr);
2746 }
2747
2748 /*
2749  * a SEQUENCE request
2750  */
2751 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2752                                   struct nfs4_sequence_args *args)
2753 {
2754         struct compound_hdr hdr = {
2755                 .minorversion = nfs4_xdr_minorversion(args),
2756         };
2757
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_sequence(xdr, args, &hdr);
2760         encode_nops(&hdr);
2761 }
2762
2763 /*
2764  * a GET_LEASE_TIME request
2765  */
2766 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2767                                         struct xdr_stream *xdr,
2768                                         struct nfs4_get_lease_time_args *args)
2769 {
2770         struct compound_hdr hdr = {
2771                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2772         };
2773         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_sequence(xdr, &args->la_seq_args, &hdr);
2777         encode_putrootfh(xdr, &hdr);
2778         encode_fsinfo(xdr, lease_bitmap, &hdr);
2779         encode_nops(&hdr);
2780 }
2781
2782 /*
2783  * a RECLAIM_COMPLETE request
2784  */
2785 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2786                                           struct xdr_stream *xdr,
2787                                 struct nfs41_reclaim_complete_args *args)
2788 {
2789         struct compound_hdr hdr = {
2790                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2791         };
2792
2793         encode_compound_hdr(xdr, req, &hdr);
2794         encode_sequence(xdr, &args->seq_args, &hdr);
2795         encode_reclaim_complete(xdr, args, &hdr);
2796         encode_nops(&hdr);
2797 }
2798
2799 /*
2800  * Encode GETDEVICELIST request
2801  */
2802 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2803                                        struct xdr_stream *xdr,
2804                                        struct nfs4_getdevicelist_args *args)
2805 {
2806         struct compound_hdr hdr = {
2807                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2808         };
2809
2810         encode_compound_hdr(xdr, req, &hdr);
2811         encode_sequence(xdr, &args->seq_args, &hdr);
2812         encode_putfh(xdr, args->fh, &hdr);
2813         encode_getdevicelist(xdr, args, &hdr);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * Encode GETDEVICEINFO request
2819  */
2820 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2821                                        struct xdr_stream *xdr,
2822                                        struct nfs4_getdeviceinfo_args *args)
2823 {
2824         struct compound_hdr hdr = {
2825                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2826         };
2827
2828         encode_compound_hdr(xdr, req, &hdr);
2829         encode_sequence(xdr, &args->seq_args, &hdr);
2830         encode_getdeviceinfo(xdr, args, &hdr);
2831
2832         /* set up reply kvec. Subtract notification bitmap max size (2)
2833          * so that notification bitmap is put in xdr_buf tail */
2834         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2835                          args->pdev->pages, args->pdev->pgbase,
2836                          args->pdev->pglen);
2837
2838         encode_nops(&hdr);
2839 }
2840
2841 /*
2842  *  Encode LAYOUTGET request
2843  */
2844 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2845                                    struct xdr_stream *xdr,
2846                                    struct nfs4_layoutget_args *args)
2847 {
2848         struct compound_hdr hdr = {
2849                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2850         };
2851
2852         encode_compound_hdr(xdr, req, &hdr);
2853         encode_sequence(xdr, &args->seq_args, &hdr);
2854         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2855         encode_layoutget(xdr, args, &hdr);
2856
2857         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2858             args->layout.pages, 0, args->layout.pglen);
2859
2860         encode_nops(&hdr);
2861 }
2862
2863 /*
2864  *  Encode LAYOUTCOMMIT request
2865  */
2866 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2867                                       struct xdr_stream *xdr,
2868                                       struct nfs4_layoutcommit_args *args)
2869 {
2870         struct nfs4_layoutcommit_data *data =
2871                 container_of(args, struct nfs4_layoutcommit_data, args);
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, &args->seq_args, &hdr);
2878         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2879         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2880         encode_getfattr(xdr, args->bitmask, &hdr);
2881         encode_nops(&hdr);
2882 }
2883
2884 /*
2885  * Encode LAYOUTRETURN request
2886  */
2887 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2888                                       struct xdr_stream *xdr,
2889                                       struct nfs4_layoutreturn_args *args)
2890 {
2891         struct compound_hdr hdr = {
2892                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2893         };
2894
2895         encode_compound_hdr(xdr, req, &hdr);
2896         encode_sequence(xdr, &args->seq_args, &hdr);
2897         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2898         encode_layoutreturn(xdr, args, &hdr);
2899         encode_nops(&hdr);
2900 }
2901
2902 /*
2903  * Encode SECINFO_NO_NAME request
2904  */
2905 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2906                                         struct xdr_stream *xdr,
2907                                         struct nfs41_secinfo_no_name_args *args)
2908 {
2909         struct compound_hdr hdr = {
2910                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2911         };
2912
2913         encode_compound_hdr(xdr, req, &hdr);
2914         encode_sequence(xdr, &args->seq_args, &hdr);
2915         encode_putrootfh(xdr, &hdr);
2916         encode_secinfo_no_name(xdr, args, &hdr);
2917         encode_nops(&hdr);
2918         return 0;
2919 }
2920
2921 /*
2922  *  Encode TEST_STATEID request
2923  */
2924 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2925                                       struct xdr_stream *xdr,
2926                                       struct nfs41_test_stateid_args *args)
2927 {
2928         struct compound_hdr hdr = {
2929                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2930         };
2931
2932         encode_compound_hdr(xdr, req, &hdr);
2933         encode_sequence(xdr, &args->seq_args, &hdr);
2934         encode_test_stateid(xdr, args, &hdr);
2935         encode_nops(&hdr);
2936 }
2937
2938 /*
2939  *  Encode FREE_STATEID request
2940  */
2941 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2942                                      struct xdr_stream *xdr,
2943                                      struct nfs41_free_stateid_args *args)
2944 {
2945         struct compound_hdr hdr = {
2946                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2947         };
2948
2949         encode_compound_hdr(xdr, req, &hdr);
2950         encode_sequence(xdr, &args->seq_args, &hdr);
2951         encode_free_stateid(xdr, args, &hdr);
2952         encode_nops(&hdr);
2953 }
2954 #endif /* CONFIG_NFS_V4_1 */
2955
2956 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2957 {
2958         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2959                 "Remaining buffer length is %tu words.\n",
2960                 func, xdr->end - xdr->p);
2961 }
2962
2963 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2964 {
2965         __be32 *p;
2966
2967         p = xdr_inline_decode(xdr, 4);
2968         if (unlikely(!p))
2969                 goto out_overflow;
2970         *len = be32_to_cpup(p);
2971         p = xdr_inline_decode(xdr, *len);
2972         if (unlikely(!p))
2973                 goto out_overflow;
2974         *string = (char *)p;
2975         return 0;
2976 out_overflow:
2977         print_overflow_msg(__func__, xdr);
2978         return -EIO;
2979 }
2980
2981 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2982 {
2983         __be32 *p;
2984
2985         p = xdr_inline_decode(xdr, 8);
2986         if (unlikely(!p))
2987                 goto out_overflow;
2988         hdr->status = be32_to_cpup(p++);
2989         hdr->taglen = be32_to_cpup(p);
2990
2991         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2992         if (unlikely(!p))
2993                 goto out_overflow;
2994         hdr->tag = (char *)p;
2995         p += XDR_QUADLEN(hdr->taglen);
2996         hdr->nops = be32_to_cpup(p);
2997         if (unlikely(hdr->nops < 1))
2998                 return nfs4_stat_to_errno(hdr->status);
2999         return 0;
3000 out_overflow:
3001         print_overflow_msg(__func__, xdr);
3002         return -EIO;
3003 }
3004
3005 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3006 {
3007         __be32 *p;
3008         uint32_t opnum;
3009         int32_t nfserr;
3010
3011         p = xdr_inline_decode(xdr, 8);
3012         if (unlikely(!p))
3013                 goto out_overflow;
3014         opnum = be32_to_cpup(p++);
3015         if (opnum != expected) {
3016                 dprintk("nfs: Server returned operation"
3017                         " %d but we issued a request for %d\n",
3018                                 opnum, expected);
3019                 return -EIO;
3020         }
3021         nfserr = be32_to_cpup(p);
3022         if (nfserr != NFS_OK)
3023                 return nfs4_stat_to_errno(nfserr);
3024         return 0;
3025 out_overflow:
3026         print_overflow_msg(__func__, xdr);
3027         return -EIO;
3028 }
3029
3030 /* Dummy routine */
3031 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3032 {
3033         __be32 *p;
3034         unsigned int strlen;
3035         char *str;
3036
3037         p = xdr_inline_decode(xdr, 12);
3038         if (likely(p))
3039                 return decode_opaque_inline(xdr, &strlen, &str);
3040         print_overflow_msg(__func__, xdr);
3041         return -EIO;
3042 }
3043
3044 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3045 {
3046         uint32_t bmlen;
3047         __be32 *p;
3048
3049         p = xdr_inline_decode(xdr, 4);
3050         if (unlikely(!p))
3051                 goto out_overflow;
3052         bmlen = be32_to_cpup(p);
3053
3054         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3055         p = xdr_inline_decode(xdr, (bmlen << 2));
3056         if (unlikely(!p))
3057                 goto out_overflow;
3058         if (bmlen > 0) {
3059                 bitmap[0] = be32_to_cpup(p++);
3060                 if (bmlen > 1) {
3061                         bitmap[1] = be32_to_cpup(p++);
3062                         if (bmlen > 2)
3063                                 bitmap[2] = be32_to_cpup(p);
3064                 }
3065         }
3066         return 0;
3067 out_overflow:
3068         print_overflow_msg(__func__, xdr);
3069         return -EIO;
3070 }
3071
3072 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3073 {
3074         __be32 *p;
3075
3076         p = xdr_inline_decode(xdr, 4);
3077         if (unlikely(!p))
3078                 goto out_overflow;
3079         *attrlen = be32_to_cpup(p);
3080         *savep = xdr_stream_pos(xdr);
3081         return 0;
3082 out_overflow:
3083         print_overflow_msg(__func__, xdr);
3084         return -EIO;
3085 }
3086
3087 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3088 {
3089         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3090                 int ret;
3091                 ret = decode_attr_bitmap(xdr, bitmask);
3092                 if (unlikely(ret < 0))
3093                         return ret;
3094                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3095         } else
3096                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3097         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3098                 bitmask[0], bitmask[1], bitmask[2]);
3099         return 0;
3100 }
3101
3102 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3103 {
3104         __be32 *p;
3105         int ret = 0;
3106
3107         *type = 0;
3108         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3109                 return -EIO;
3110         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3111                 p = xdr_inline_decode(xdr, 4);
3112                 if (unlikely(!p))
3113                         goto out_overflow;
3114                 *type = be32_to_cpup(p);
3115                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3116                         dprintk("%s: bad type %d\n", __func__, *type);
3117                         return -EIO;
3118                 }
3119                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3120                 ret = NFS_ATTR_FATTR_TYPE;
3121         }
3122         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3123         return ret;
3124 out_overflow:
3125         print_overflow_msg(__func__, xdr);
3126         return -EIO;
3127 }
3128
3129 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3130                                       uint32_t *bitmap, uint32_t *type)
3131 {
3132         __be32 *p;
3133
3134         *type = 0;
3135         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3136                 return -EIO;
3137         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3138                 p = xdr_inline_decode(xdr, 4);
3139                 if (unlikely(!p))
3140                         goto out_overflow;
3141                 *type = be32_to_cpup(p);
3142                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3143         }
3144         dprintk("%s: expire type=0x%x\n", __func__, *type);
3145         return 0;
3146 out_overflow:
3147         print_overflow_msg(__func__, xdr);
3148         return -EIO;
3149 }
3150
3151 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3152 {
3153         __be32 *p;
3154         int ret = 0;
3155
3156         *change = 0;
3157         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3158                 return -EIO;
3159         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3160                 p = xdr_inline_decode(xdr, 8);
3161                 if (unlikely(!p))
3162                         goto out_overflow;
3163                 xdr_decode_hyper(p, change);
3164                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3165                 ret = NFS_ATTR_FATTR_CHANGE;
3166         }
3167         dprintk("%s: change attribute=%Lu\n", __func__,
3168                         (unsigned long long)*change);
3169         return ret;
3170 out_overflow:
3171         print_overflow_msg(__func__, xdr);
3172         return -EIO;
3173 }
3174
3175 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3176 {
3177         __be32 *p;
3178         int ret = 0;
3179
3180         *size = 0;
3181         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3182                 return -EIO;
3183         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3184                 p = xdr_inline_decode(xdr, 8);
3185                 if (unlikely(!p))
3186                         goto out_overflow;
3187                 xdr_decode_hyper(p, size);
3188                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3189                 ret = NFS_ATTR_FATTR_SIZE;
3190         }
3191         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3192         return ret;
3193 out_overflow:
3194         print_overflow_msg(__func__, xdr);
3195         return -EIO;
3196 }
3197
3198 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3199 {
3200         __be32 *p;
3201
3202         *res = 0;
3203         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3204                 return -EIO;
3205         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3206                 p = xdr_inline_decode(xdr, 4);
3207                 if (unlikely(!p))
3208                         goto out_overflow;
3209                 *res = be32_to_cpup(p);
3210                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3211         }
3212         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3213         return 0;
3214 out_overflow:
3215         print_overflow_msg(__func__, xdr);
3216         return -EIO;
3217 }
3218
3219 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3220 {
3221         __be32 *p;
3222
3223         *res = 0;
3224         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3225                 return -EIO;
3226         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3227                 p = xdr_inline_decode(xdr, 4);
3228                 if (unlikely(!p))
3229                         goto out_overflow;
3230                 *res = be32_to_cpup(p);
3231                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3232         }
3233         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3234         return 0;
3235 out_overflow:
3236         print_overflow_msg(__func__, xdr);
3237         return -EIO;
3238 }
3239
3240 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3241 {
3242         __be32 *p;
3243         int ret = 0;
3244
3245         fsid->major = 0;
3246         fsid->minor = 0;
3247         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3248                 return -EIO;
3249         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3250                 p = xdr_inline_decode(xdr, 16);
3251                 if (unlikely(!p))
3252                         goto out_overflow;
3253                 p = xdr_decode_hyper(p, &fsid->major);
3254                 xdr_decode_hyper(p, &fsid->minor);
3255                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3256                 ret = NFS_ATTR_FATTR_FSID;
3257         }
3258         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3259                         (unsigned long long)fsid->major,
3260                         (unsigned long long)fsid->minor);
3261         return ret;
3262 out_overflow:
3263         print_overflow_msg(__func__, xdr);
3264         return -EIO;
3265 }
3266
3267 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3268 {
3269         __be32 *p;
3270
3271         *res = 60;
3272         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3273                 return -EIO;
3274         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3275                 p = xdr_inline_decode(xdr, 4);
3276                 if (unlikely(!p))
3277                         goto out_overflow;
3278                 *res = be32_to_cpup(p);
3279                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3280         }
3281         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3282         return 0;
3283 out_overflow:
3284         print_overflow_msg(__func__, xdr);
3285         return -EIO;
3286 }
3287
3288 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3289 {
3290         __be32 *p;
3291
3292         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3293                 return -EIO;
3294         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3295                 p = xdr_inline_decode(xdr, 4);
3296                 if (unlikely(!p))
3297                         goto out_overflow;
3298                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3299                 *res = -be32_to_cpup(p);
3300         }
3301         return 0;
3302 out_overflow:
3303         print_overflow_msg(__func__, xdr);
3304         return -EIO;
3305 }
3306
3307 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3308 {
3309         __be32 *p;
3310         int len;
3311
3312         if (fh != NULL)
3313                 memset(fh, 0, sizeof(*fh));
3314
3315         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3316                 return -EIO;
3317         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3318                 p = xdr_inline_decode(xdr, 4);
3319                 if (unlikely(!p))
3320                         goto out_overflow;
3321                 len = be32_to_cpup(p);
3322                 if (len > NFS4_FHSIZE)
3323                         return -EIO;
3324                 p = xdr_inline_decode(xdr, len);
3325                 if (unlikely(!p))
3326                         goto out_overflow;
3327                 if (fh != NULL) {
3328                         memcpy(fh->data, p, len);
3329                         fh->size = len;
3330                 }
3331                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3332         }
3333         return 0;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336         return -EIO;
3337 }
3338
3339 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3340 {
3341         __be32 *p;
3342
3343         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3344         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3345                 return -EIO;
3346         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3347                 p = xdr_inline_decode(xdr, 4);
3348                 if (unlikely(!p))
3349                         goto out_overflow;
3350                 *res = be32_to_cpup(p);
3351                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3352         }
3353         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3354         return 0;
3355 out_overflow:
3356         print_overflow_msg(__func__, xdr);
3357         return -EIO;
3358 }
3359
3360 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3361 {
3362         __be32 *p;
3363         int ret = 0;
3364
3365         *fileid = 0;
3366         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3367                 return -EIO;
3368         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3369                 p = xdr_inline_decode(xdr, 8);
3370                 if (unlikely(!p))
3371                         goto out_overflow;
3372                 xdr_decode_hyper(p, fileid);
3373                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3374                 ret = NFS_ATTR_FATTR_FILEID;
3375         }
3376         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3377         return ret;
3378 out_overflow:
3379         print_overflow_msg(__func__, xdr);
3380         return -EIO;
3381 }
3382
3383 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3384 {
3385         __be32 *p;
3386         int ret = 0;
3387
3388         *fileid = 0;
3389         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3390                 return -EIO;
3391         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3392                 p = xdr_inline_decode(xdr, 8);
3393                 if (unlikely(!p))
3394                         goto out_overflow;
3395                 xdr_decode_hyper(p, fileid);
3396                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3397                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3398         }
3399         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3400         return ret;
3401 out_overflow:
3402         print_overflow_msg(__func__, xdr);
3403         return -EIO;
3404 }
3405
3406 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3407 {
3408         __be32 *p;
3409         int status = 0;
3410
3411         *res = 0;
3412         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3413                 return -EIO;
3414         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3415                 p = xdr_inline_decode(xdr, 8);
3416                 if (unlikely(!p))
3417                         goto out_overflow;
3418                 xdr_decode_hyper(p, res);
3419                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3420         }
3421         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3422         return status;
3423 out_overflow:
3424         print_overflow_msg(__func__, xdr);
3425         return -EIO;
3426 }
3427
3428 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3429 {
3430         __be32 *p;
3431         int status = 0;
3432
3433         *res = 0;
3434         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3435                 return -EIO;
3436         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3437                 p = xdr_inline_decode(xdr, 8);
3438                 if (unlikely(!p))
3439                         goto out_overflow;
3440                 xdr_decode_hyper(p, res);
3441                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3442         }
3443         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3444         return status;
3445 out_overflow:
3446         print_overflow_msg(__func__, xdr);
3447         return -EIO;
3448 }
3449
3450 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3451 {
3452         __be32 *p;
3453         int status = 0;
3454
3455         *res = 0;
3456         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3457                 return -EIO;
3458         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3459                 p = xdr_inline_decode(xdr, 8);
3460                 if (unlikely(!p))
3461                         goto out_overflow;
3462                 xdr_decode_hyper(p, res);
3463                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3464         }
3465         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3466         return status;
3467 out_overflow:
3468         print_overflow_msg(__func__, xdr);
3469         return -EIO;
3470 }
3471
3472 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3473 {
3474         u32 n;
3475         __be32 *p;
3476         int status = 0;
3477
3478         p = xdr_inline_decode(xdr, 4);
3479         if (unlikely(!p))
3480                 goto out_overflow;
3481         n = be32_to_cpup(p);
3482         if (n == 0)
3483                 goto root_path;
3484         dprintk("pathname4: ");
3485         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3486                 dprintk("cannot parse %d components in path\n", n);
3487                 goto out_eio;
3488         }
3489         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3490                 struct nfs4_string *component = &path->components[path->ncomponents];
3491                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3492                 if (unlikely(status != 0))
3493                         goto out_eio;
3494                 ifdebug (XDR)
3495                         pr_cont("%s%.*s ",
3496                                 (path->ncomponents != n ? "/ " : ""),
3497                                 component->len, component->data);
3498         }
3499 out:
3500         return status;
3501 root_path:
3502 /* a root pathname is sent as a zero component4 */
3503         path->ncomponents = 1;
3504         path->components[0].len=0;
3505         path->components[0].data=NULL;
3506         dprintk("pathname4: /\n");
3507         goto out;
3508 out_eio:
3509         dprintk(" status %d", status);
3510         status = -EIO;
3511         goto out;
3512 out_overflow:
3513         print_overflow_msg(__func__, xdr);
3514         return -EIO;
3515 }
3516
3517 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3518 {
3519         int n;
3520         __be32 *p;
3521         int status = -EIO;
3522
3523         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3524                 goto out;
3525         status = 0;
3526         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3527                 goto out;
3528         status = -EIO;
3529         /* Ignore borken servers that return unrequested attrs */
3530         if (unlikely(res == NULL))
3531                 goto out;
3532         dprintk("%s: fsroot:\n", __func__);
3533         status = decode_pathname(xdr, &res->fs_path);
3534         if (unlikely(status != 0))
3535                 goto out;
3536         p = xdr_inline_decode(xdr, 4);
3537         if (unlikely(!p))
3538                 goto out_overflow;
3539         n = be32_to_cpup(p);
3540         if (n <= 0)
3541                 goto out_eio;
3542         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3543                 u32 m;
3544                 struct nfs4_fs_location *loc;
3545
3546                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3547                         break;
3548                 loc = &res->locations[res->nlocations];
3549                 p = xdr_inline_decode(xdr, 4);
3550                 if (unlikely(!p))
3551                         goto out_overflow;
3552                 m = be32_to_cpup(p);
3553
3554                 dprintk("%s: servers:\n", __func__);
3555                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3556                         struct nfs4_string *server;
3557
3558                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3559                                 unsigned int i;
3560                                 dprintk("%s: using first %u of %u servers "
3561                                         "returned for location %u\n",
3562                                                 __func__,
3563                                                 NFS4_FS_LOCATION_MAXSERVERS,
3564                                                 m, res->nlocations);
3565                                 for (i = loc->nservers; i < m; i++) {
3566                                         unsigned int len;
3567                                         char *data;
3568                                         status = decode_opaque_inline(xdr, &len, &data);
3569                                         if (unlikely(status != 0))
3570                                                 goto out_eio;
3571                                 }
3572                                 break;
3573                         }
3574                         server = &loc->servers[loc->nservers];
3575                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3576                         if (unlikely(status != 0))
3577                                 goto out_eio;
3578                         dprintk("%s ", server->data);
3579                 }
3580                 status = decode_pathname(xdr, &loc->rootpath);
3581                 if (unlikely(status != 0))
3582                         goto out_eio;
3583         }
3584         if (res->nlocations != 0)
3585                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3586 out:
3587         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3588         return status;
3589 out_overflow:
3590         print_overflow_msg(__func__, xdr);
3591 out_eio:
3592         status = -EIO;
3593         goto out;
3594 }
3595
3596 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3597 {
3598         __be32 *p;
3599         int status = 0;
3600
3601         *res = 0;
3602         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3603                 return -EIO;
3604         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3605                 p = xdr_inline_decode(xdr, 8);
3606                 if (unlikely(!p))
3607                         goto out_overflow;
3608                 xdr_decode_hyper(p, res);
3609                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3610         }
3611         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3612         return status;
3613 out_overflow:
3614         print_overflow_msg(__func__, xdr);
3615         return -EIO;
3616 }
3617
3618 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3619 {
3620         __be32 *p;
3621         int status = 0;
3622
3623         *maxlink = 1;
3624         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3625                 return -EIO;
3626         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3627                 p = xdr_inline_decode(xdr, 4);
3628                 if (unlikely(!p))
3629                         goto out_overflow;
3630                 *maxlink = be32_to_cpup(p);
3631                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3632         }
3633         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3634         return status;
3635 out_overflow:
3636         print_overflow_msg(__func__, xdr);
3637         return -EIO;
3638 }
3639
3640 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3641 {
3642         __be32 *p;
3643         int status = 0;
3644
3645         *maxname = 1024;
3646         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3647                 return -EIO;
3648         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3649                 p = xdr_inline_decode(xdr, 4);
3650                 if (unlikely(!p))
3651                         goto out_overflow;
3652                 *maxname = be32_to_cpup(p);
3653                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3654         }
3655         dprintk("%s: maxname=%u\n", __func__, *maxname);
3656         return status;
3657 out_overflow:
3658         print_overflow_msg(__func__, xdr);
3659         return -EIO;
3660 }
3661
3662 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3663 {
3664         __be32 *p;
3665         int status = 0;
3666
3667         *res = 1024;
3668         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3669                 return -EIO;
3670         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3671                 uint64_t maxread;
3672                 p = xdr_inline_decode(xdr, 8);
3673                 if (unlikely(!p))
3674                         goto out_overflow;
3675                 xdr_decode_hyper(p, &maxread);
3676                 if (maxread > 0x7FFFFFFF)
3677                         maxread = 0x7FFFFFFF;
3678                 *res = (uint32_t)maxread;
3679                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3680         }
3681         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3682         return status;
3683 out_overflow:
3684         print_overflow_msg(__func__, xdr);
3685         return -EIO;
3686 }
3687
3688 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3689 {
3690         __be32 *p;
3691         int status = 0;
3692
3693         *res = 1024;
3694         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3695                 return -EIO;
3696         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3697                 uint64_t maxwrite;
3698                 p = xdr_inline_decode(xdr, 8);
3699                 if (unlikely(!p))
3700                         goto out_overflow;
3701                 xdr_decode_hyper(p, &maxwrite);
3702                 if (maxwrite > 0x7FFFFFFF)
3703                         maxwrite = 0x7FFFFFFF;
3704                 *res = (uint32_t)maxwrite;
3705                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3706         }
3707         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3708         return status;
3709 out_overflow:
3710         print_overflow_msg(__func__, xdr);
3711         return -EIO;
3712 }
3713
3714 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3715 {
3716         uint32_t tmp;
3717         __be32 *p;
3718         int ret = 0;
3719
3720         *mode = 0;
3721         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3722                 return -EIO;
3723         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3724                 p = xdr_inline_decode(xdr, 4);
3725                 if (unlikely(!p))
3726                         goto out_overflow;
3727                 tmp = be32_to_cpup(p);
3728                 *mode = tmp & ~S_IFMT;
3729                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3730                 ret = NFS_ATTR_FATTR_MODE;
3731         }
3732         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3733         return ret;
3734 out_overflow:
3735         print_overflow_msg(__func__, xdr);
3736         return -EIO;
3737 }
3738
3739 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3740 {
3741         __be32 *p;
3742         int ret = 0;
3743
3744         *nlink = 1;
3745         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3746                 return -EIO;
3747         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3748                 p = xdr_inline_decode(xdr, 4);
3749                 if (unlikely(!p))
3750                         goto out_overflow;
3751                 *nlink = be32_to_cpup(p);
3752                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3753                 ret = NFS_ATTR_FATTR_NLINK;
3754         }
3755         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3756         return ret;
3757 out_overflow:
3758         print_overflow_msg(__func__, xdr);
3759         return -EIO;
3760 }
3761
3762 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3763                 const struct nfs_server *server, kuid_t *uid,
3764                 struct nfs4_string *owner_name)
3765 {
3766         uint32_t len;
3767         __be32 *p;
3768         int ret = 0;
3769
3770         *uid = make_kuid(&init_user_ns, -2);
3771         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3772                 return -EIO;
3773         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3774                 p = xdr_inline_decode(xdr, 4);
3775                 if (unlikely(!p))
3776                         goto out_overflow;
3777                 len = be32_to_cpup(p);
3778                 p = xdr_inline_decode(xdr, len);
3779                 if (unlikely(!p))
3780                         goto out_overflow;
3781                 if (owner_name != NULL) {
3782                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3783                         if (owner_name->data != NULL) {
3784                                 owner_name->len = len;
3785                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3786                         }
3787                 } else if (len < XDR_MAX_NETOBJ) {
3788                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3789                                 ret = NFS_ATTR_FATTR_OWNER;
3790                         else
3791                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3792                                                 __func__);
3793                 } else
3794                         dprintk("%s: name too long (%u)!\n",
3795                                         __func__, len);
3796                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3797         }
3798         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3799         return ret;
3800 out_overflow:
3801         print_overflow_msg(__func__, xdr);
3802         return -EIO;
3803 }
3804
3805 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3806                 const struct nfs_server *server, kgid_t *gid,
3807                 struct nfs4_string *group_name)
3808 {
3809         uint32_t len;
3810         __be32 *p;
3811         int ret = 0;
3812
3813         *gid = make_kgid(&init_user_ns, -2);
3814         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3815                 return -EIO;
3816         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3817                 p = xdr_inline_decode(xdr, 4);
3818                 if (unlikely(!p))
3819                         goto out_overflow;
3820                 len = be32_to_cpup(p);
3821                 p = xdr_inline_decode(xdr, len);
3822                 if (unlikely(!p))
3823                         goto out_overflow;
3824                 if (group_name != NULL) {
3825                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3826                         if (group_name->data != NULL) {
3827                                 group_name->len = len;
3828                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3829                         }
3830                 } else if (len < XDR_MAX_NETOBJ) {
3831                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3832                                 ret = NFS_ATTR_FATTR_GROUP;
3833                         else
3834                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3835                                                 __func__);
3836                 } else
3837                         dprintk("%s: name too long (%u)!\n",
3838                                         __func__, len);
3839                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3840         }
3841         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3842         return ret;
3843 out_overflow:
3844         print_overflow_msg(__func__, xdr);
3845         return -EIO;
3846 }
3847
3848 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3849 {
3850         uint32_t major = 0, minor = 0;
3851         __be32 *p;
3852         int ret = 0;
3853
3854         *rdev = MKDEV(0,0);
3855         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3856                 return -EIO;
3857         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3858                 dev_t tmp;
3859
3860                 p = xdr_inline_decode(xdr, 8);
3861                 if (unlikely(!p))
3862                         goto out_overflow;
3863                 major = be32_to_cpup(p++);
3864                 minor = be32_to_cpup(p);
3865                 tmp = MKDEV(major, minor);
3866                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3867                         *rdev = tmp;
3868                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3869                 ret = NFS_ATTR_FATTR_RDEV;
3870         }
3871         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3872         return ret;
3873 out_overflow:
3874         print_overflow_msg(__func__, xdr);
3875         return -EIO;
3876 }
3877
3878 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3879 {
3880         __be32 *p;
3881         int status = 0;
3882
3883         *res = 0;
3884         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3885                 return -EIO;
3886         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3887                 p = xdr_inline_decode(xdr, 8);
3888                 if (unlikely(!p))
3889                         goto out_overflow;
3890                 xdr_decode_hyper(p, res);
3891                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3892         }
3893         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3894         return status;
3895 out_overflow:
3896         print_overflow_msg(__func__, xdr);
3897         return -EIO;
3898 }
3899
3900 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3901 {
3902         __be32 *p;
3903         int status = 0;
3904
3905         *res = 0;
3906         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3907                 return -EIO;
3908         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3909                 p = xdr_inline_decode(xdr, 8);
3910                 if (unlikely(!p))
3911                         goto out_overflow;
3912                 xdr_decode_hyper(p, res);
3913                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3914         }
3915         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3916         return status;
3917 out_overflow:
3918         print_overflow_msg(__func__, xdr);
3919         return -EIO;
3920 }
3921
3922 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3923 {
3924         __be32 *p;
3925         int status = 0;
3926
3927         *res = 0;
3928         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3929                 return -EIO;
3930         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3931                 p = xdr_inline_decode(xdr, 8);
3932                 if (unlikely(!p))
3933                         goto out_overflow;
3934                 xdr_decode_hyper(p, res);
3935                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3936         }
3937         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3938         return status;
3939 out_overflow:
3940         print_overflow_msg(__func__, xdr);
3941         return -EIO;
3942 }
3943
3944 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3945 {
3946         __be32 *p;
3947         int ret = 0;
3948
3949         *used = 0;
3950         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3951                 return -EIO;
3952         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3953                 p = xdr_inline_decode(xdr, 8);
3954                 if (unlikely(!p))
3955                         goto out_overflow;
3956                 xdr_decode_hyper(p, used);
3957                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3958                 ret = NFS_ATTR_FATTR_SPACE_USED;
3959         }
3960         dprintk("%s: space used=%Lu\n", __func__,
3961                         (unsigned long long)*used);
3962         return ret;
3963 out_overflow:
3964         print_overflow_msg(__func__, xdr);
3965         return -EIO;
3966 }
3967
3968 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3969 {
3970         __be32 *p;
3971         uint64_t sec;
3972         uint32_t nsec;
3973
3974         p = xdr_inline_decode(xdr, 12);
3975         if (unlikely(!p))
3976                 goto out_overflow;
3977         p = xdr_decode_hyper(p, &sec);
3978         nsec = be32_to_cpup(p);
3979         time->tv_sec = (time_t)sec;
3980         time->tv_nsec = (long)nsec;
3981         return 0;
3982 out_overflow:
3983         print_overflow_msg(__func__, xdr);
3984         return -EIO;
3985 }
3986
3987 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3988 {
3989         int status = 0;
3990
3991         time->tv_sec = 0;
3992         time->tv_nsec = 0;
3993         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3994                 return -EIO;
3995         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3996                 status = decode_attr_time(xdr, time);
3997                 if (status == 0)
3998                         status = NFS_ATTR_FATTR_ATIME;
3999                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4000         }
4001         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4002         return status;
4003 }
4004
4005 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4006 {
4007         int status = 0;
4008
4009         time->tv_sec = 0;
4010         time->tv_nsec = 0;
4011         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4012                 return -EIO;
4013         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4014                 status = decode_attr_time(xdr, time);
4015                 if (status == 0)
4016                         status = NFS_ATTR_FATTR_CTIME;
4017                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4018         }
4019         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4020         return status;
4021 }
4022
4023 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4024                                   struct timespec *time)
4025 {
4026         int status = 0;
4027
4028         time->tv_sec = 0;
4029         time->tv_nsec = 0;
4030         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4031                 return -EIO;
4032         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4033                 status = decode_attr_time(xdr, time);
4034                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4035         }
4036         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4037                 (long)time->tv_nsec);
4038         return status;
4039 }
4040
4041 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4042 {
4043         int status = 0;
4044
4045         time->tv_sec = 0;
4046         time->tv_nsec = 0;
4047         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4048                 return -EIO;
4049         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4050                 status = decode_attr_time(xdr, time);
4051                 if (status == 0)
4052                         status = NFS_ATTR_FATTR_MTIME;
4053                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4054         }
4055         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4056         return status;
4057 }
4058
4059 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4060 {
4061         unsigned int attrwords = XDR_QUADLEN(attrlen);
4062         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4063
4064         if (unlikely(attrwords != nwords)) {
4065                 dprintk("%s: server returned incorrect attribute length: "
4066                         "%u %c %u\n",
4067                                 __func__,
4068                                 attrwords << 2,
4069                                 (attrwords < nwords) ? '<' : '>',
4070                                 nwords << 2);
4071                 return -EIO;
4072         }
4073         return 0;
4074 }
4075
4076 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4077 {
4078         __be32 *p;
4079
4080         p = xdr_inline_decode(xdr, 20);
4081         if (unlikely(!p))
4082                 goto out_overflow;
4083         cinfo->atomic = be32_to_cpup(p++);
4084         p = xdr_decode_hyper(p, &cinfo->before);
4085         xdr_decode_hyper(p, &cinfo->after);
4086         return 0;
4087 out_overflow:
4088         print_overflow_msg(__func__, xdr);
4089         return -EIO;
4090 }
4091
4092 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4093 {
4094         __be32 *p;
4095         uint32_t supp, acc;
4096         int status;
4097
4098         status = decode_op_hdr(xdr, OP_ACCESS);
4099         if (status)
4100                 return status;
4101         p = xdr_inline_decode(xdr, 8);
4102         if (unlikely(!p))
4103                 goto out_overflow;
4104         supp = be32_to_cpup(p++);
4105         acc = be32_to_cpup(p);
4106         *supported = supp;
4107         *access = acc;
4108         return 0;
4109 out_overflow:
4110         print_overflow_msg(__func__, xdr);
4111         return -EIO;
4112 }
4113
4114 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4115 {
4116         __be32 *p;
4117
4118         p = xdr_inline_decode(xdr, len);
4119         if (likely(p)) {
4120                 memcpy(buf, p, len);
4121                 return 0;
4122         }
4123         print_overflow_msg(__func__, xdr);
4124         return -EIO;
4125 }
4126
4127 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4128 {
4129         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4130 }
4131
4132 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4133 {
4134         int status;
4135
4136         status = decode_op_hdr(xdr, OP_CLOSE);
4137         if (status != -EIO)
4138                 nfs_increment_open_seqid(status, res->seqid);
4139         if (!status)
4140                 status = decode_stateid(xdr, &res->stateid);
4141         return status;
4142 }
4143
4144 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4145 {
4146         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4147 }
4148
4149 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4150 {
4151         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4152 }
4153
4154 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4155 {
4156         int status;
4157
4158         status = decode_op_hdr(xdr, OP_COMMIT);
4159         if (!status)
4160                 status = decode_write_verifier(xdr, &res->verf->verifier);
4161         return status;
4162 }
4163
4164 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4165 {
4166         __be32 *p;
4167         uint32_t bmlen;
4168         int status;
4169
4170         status = decode_op_hdr(xdr, OP_CREATE);
4171         if (status)
4172                 return status;
4173         if ((status = decode_change_info(xdr, cinfo)))
4174                 return status;
4175         p = xdr_inline_decode(xdr, 4);
4176         if (unlikely(!p))
4177                 goto out_overflow;
4178         bmlen = be32_to_cpup(p);
4179         p = xdr_inline_decode(xdr, bmlen << 2);
4180         if (likely(p))
4181                 return 0;
4182 out_overflow:
4183         print_overflow_msg(__func__, xdr);
4184         return -EIO;
4185 }
4186
4187 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4188 {
4189         unsigned int savep;
4190         uint32_t attrlen, bitmap[3] = {0};
4191         int status;
4192
4193         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4194                 goto xdr_error;
4195         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4196                 goto xdr_error;
4197         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4198                 goto xdr_error;
4199         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4200                 goto xdr_error;
4201         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4202                                                  &res->fh_expire_type)) != 0)
4203                 goto xdr_error;
4204         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4205                 goto xdr_error;
4206         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4207                 goto xdr_error;
4208         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4209                 goto xdr_error;
4210         status = verify_attr_len(xdr, savep, attrlen);
4211 xdr_error:
4212         dprintk("%s: xdr returned %d!\n", __func__, -status);
4213         return status;
4214 }
4215
4216 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4217 {
4218         unsigned int savep;
4219         uint32_t attrlen, bitmap[3] = {0};
4220         int status;
4221
4222         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4223                 goto xdr_error;
4224         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4225                 goto xdr_error;
4226         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4227                 goto xdr_error;
4228
4229         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4230                 goto xdr_error;
4231         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4232                 goto xdr_error;
4233         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4234                 goto xdr_error;
4235         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4236                 goto xdr_error;
4237         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4238                 goto xdr_error;
4239         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4240                 goto xdr_error;
4241
4242         status = verify_attr_len(xdr, savep, attrlen);
4243 xdr_error:
4244         dprintk("%s: xdr returned %d!\n", __func__, -status);
4245         return status;
4246 }
4247
4248 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4249 {
4250         unsigned int savep;
4251         uint32_t attrlen, bitmap[3] = {0};
4252         int status;
4253
4254         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4255                 goto xdr_error;
4256         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4257                 goto xdr_error;
4258         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4259                 goto xdr_error;
4260
4261         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4262                 goto xdr_error;
4263         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4264                 goto xdr_error;
4265
4266         status = verify_attr_len(xdr, savep, attrlen);
4267 xdr_error:
4268         dprintk("%s: xdr returned %d!\n", __func__, -status);
4269         return status;
4270 }
4271
4272 static int decode_threshold_hint(struct xdr_stream *xdr,
4273                                   uint32_t *bitmap,
4274                                   uint64_t *res,
4275                                   uint32_t hint_bit)
4276 {
4277         __be32 *p;
4278
4279         *res = 0;
4280         if (likely(bitmap[0] & hint_bit)) {
4281                 p = xdr_inline_decode(xdr, 8);
4282                 if (unlikely(!p))
4283                         goto out_overflow;
4284                 xdr_decode_hyper(p, res);
4285         }
4286         return 0;
4287 out_overflow:
4288         print_overflow_msg(__func__, xdr);
4289         return -EIO;
4290 }
4291
4292 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4293                                         struct nfs4_threshold *res)
4294 {
4295         __be32 *p;
4296         unsigned int savep;
4297         uint32_t bitmap[3] = {0,}, attrlen;
4298         int status;
4299
4300         /* layout type */
4301         p = xdr_inline_decode(xdr, 4);
4302         if (unlikely(!p)) {
4303                 print_overflow_msg(__func__, xdr);
4304                 return -EIO;
4305         }
4306         res->l_type = be32_to_cpup(p);
4307
4308         /* thi_hintset bitmap */
4309         status = decode_attr_bitmap(xdr, bitmap);
4310         if (status < 0)
4311                 goto xdr_error;
4312
4313         /* thi_hintlist length */
4314         status = decode_attr_length(xdr, &attrlen, &savep);
4315         if (status < 0)
4316                 goto xdr_error;
4317         /* thi_hintlist */
4318         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4319         if (status < 0)
4320                 goto xdr_error;
4321         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4322         if (status < 0)
4323                 goto xdr_error;
4324         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4325                                        THRESHOLD_RD_IO);
4326         if (status < 0)
4327                 goto xdr_error;
4328         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4329                                        THRESHOLD_WR_IO);
4330         if (status < 0)
4331                 goto xdr_error;
4332
4333         status = verify_attr_len(xdr, savep, attrlen);
4334         res->bm = bitmap[0];
4335
4336         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4337                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4338                 res->wr_io_sz);
4339 xdr_error:
4340         dprintk("%s ret=%d!\n", __func__, status);
4341         return status;
4342 }
4343
4344 /*
4345  * Thresholds on pNFS direct I/O vrs MDS I/O
4346  */
4347 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4348                                     uint32_t *bitmap,
4349                                     struct nfs4_threshold *res)
4350 {
4351         __be32 *p;
4352         int status = 0;
4353         uint32_t num;
4354
4355         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4356                 return -EIO;
4357         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4358                 /* Did the server return an unrequested attribute? */
4359                 if (unlikely(res == NULL))
4360                         return -EREMOTEIO;
4361                 p = xdr_inline_decode(xdr, 4);
4362                 if (unlikely(!p))
4363                         goto out_overflow;
4364                 num = be32_to_cpup(p);
4365                 if (num == 0)
4366                         return 0;
4367                 if (num > 1)
4368                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4369                                 "drivers per filesystem not supported\n",
4370                                 __func__);
4371
4372                 status = decode_first_threshold_item4(xdr, res);
4373                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4374         }
4375         return status;
4376 out_overflow:
4377         print_overflow_msg(__func__, xdr);
4378         return -EIO;
4379 }
4380
4381 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4382                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4383                 struct nfs4_fs_locations *fs_loc,
4384                 const struct nfs_server *server)
4385 {
4386         int status;
4387         umode_t fmode = 0;
4388         uint32_t type;
4389         int32_t err;
4390
4391         status = decode_attr_type(xdr, bitmap, &type);
4392         if (status < 0)
4393                 goto xdr_error;
4394         fattr->mode = 0;
4395         if (status != 0) {
4396                 fattr->mode |= nfs_type2fmt[type];
4397                 fattr->valid |= status;
4398         }
4399
4400         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4401         if (status < 0)
4402                 goto xdr_error;
4403         fattr->valid |= status;
4404
4405         status = decode_attr_size(xdr, bitmap, &fattr->size);
4406         if (status < 0)
4407                 goto xdr_error;
4408         fattr->valid |= status;
4409
4410         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4411         if (status < 0)
4412                 goto xdr_error;
4413         fattr->valid |= status;
4414
4415         err = 0;
4416         status = decode_attr_error(xdr, bitmap, &err);
4417         if (status < 0)
4418                 goto xdr_error;
4419
4420         status = decode_attr_filehandle(xdr, bitmap, fh);
4421         if (status < 0)
4422                 goto xdr_error;
4423
4424         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4425         if (status < 0)
4426                 goto xdr_error;
4427         fattr->valid |= status;
4428
4429         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4430         if (status < 0)
4431                 goto xdr_error;
4432         fattr->valid |= status;
4433
4434         status = decode_attr_mode(xdr, bitmap, &fmode);
4435         if (status < 0)
4436                 goto xdr_error;
4437         if (status != 0) {
4438                 fattr->mode |= fmode;
4439                 fattr->valid |= status;
4440         }
4441
4442         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4443         if (status < 0)
4444                 goto xdr_error;
4445         fattr->valid |= status;
4446
4447         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4448         if (status < 0)
4449                 goto xdr_error;
4450         fattr->valid |= status;
4451
4452         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4453         if (status < 0)
4454                 goto xdr_error;
4455         fattr->valid |= status;
4456
4457         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4458         if (status < 0)
4459                 goto xdr_error;
4460         fattr->valid |= status;
4461
4462         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4463         if (status < 0)
4464                 goto xdr_error;
4465         fattr->valid |= status;
4466
4467         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4468         if (status < 0)
4469                 goto xdr_error;
4470         fattr->valid |= status;
4471
4472         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4473         if (status < 0)
4474                 goto xdr_error;
4475         fattr->valid |= status;
4476
4477         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4478         if (status < 0)
4479                 goto xdr_error;
4480         fattr->valid |= status;
4481
4482         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4483         if (status < 0)
4484                 goto xdr_error;
4485         fattr->valid |= status;
4486
4487         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4488         if (status < 0)
4489                 goto xdr_error;
4490
4491 xdr_error:
4492         dprintk("%s: xdr returned %d\n", __func__, -status);
4493         return status;
4494 }
4495
4496 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4497                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4498                 const struct nfs_server *server)
4499 {
4500         unsigned int savep;
4501         uint32_t attrlen,
4502                  bitmap[3] = {0};
4503         int status;
4504
4505         status = decode_op_hdr(xdr, OP_GETATTR);
4506         if (status < 0)
4507                 goto xdr_error;
4508
4509         status = decode_attr_bitmap(xdr, bitmap);
4510         if (status < 0)
4511                 goto xdr_error;
4512
4513         status = decode_attr_length(xdr, &attrlen, &savep);
4514         if (status < 0)
4515                 goto xdr_error;
4516
4517         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4518         if (status < 0)
4519                 goto xdr_error;
4520
4521         status = verify_attr_len(xdr, savep, attrlen);
4522 xdr_error:
4523         dprintk("%s: xdr returned %d\n", __func__, -status);
4524         return status;
4525 }
4526
4527 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4528                 const struct nfs_server *server)
4529 {
4530         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4531 }
4532
4533 /*
4534  * Decode potentially multiple layout types. Currently we only support
4535  * one layout driver per file system.
4536  */
4537 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4538                                          uint32_t *layouttype)
4539 {
4540         uint32_t *p;
4541         int num;
4542
4543         p = xdr_inline_decode(xdr, 4);
4544         if (unlikely(!p))
4545                 goto out_overflow;
4546         num = be32_to_cpup(p);
4547
4548         /* pNFS is not supported by the underlying file system */
4549         if (num == 0) {
4550                 *layouttype = 0;
4551                 return 0;
4552         }
4553         if (num > 1)
4554                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4555                         "drivers per filesystem not supported\n", __func__);
4556
4557         /* Decode and set first layout type, move xdr->p past unused types */
4558         p = xdr_inline_decode(xdr, num * 4);
4559         if (unlikely(!p))
4560                 goto out_overflow;
4561         *layouttype = be32_to_cpup(p);
4562         return 0;
4563 out_overflow:
4564         print_overflow_msg(__func__, xdr);
4565         return -EIO;
4566 }
4567
4568 /*
4569  * The type of file system exported.
4570  * Note we must ensure that layouttype is set in any non-error case.
4571  */
4572 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4573                                 uint32_t *layouttype)
4574 {
4575         int status = 0;
4576
4577         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4578         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4579                 return -EIO;
4580         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4581                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4582                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4583         } else
4584                 *layouttype = 0;
4585         return status;
4586 }
4587
4588 /*
4589  * The prefered block size for layout directed io
4590  */
4591 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4592                                       uint32_t *res)
4593 {
4594         __be32 *p;
4595
4596         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4597         *res = 0;
4598         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4599                 p = xdr_inline_decode(xdr, 4);
4600                 if (unlikely(!p)) {
4601                         print_overflow_msg(__func__, xdr);
4602                         return -EIO;
4603                 }
4604                 *res = be32_to_cpup(p);
4605                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4606         }
4607         return 0;
4608 }
4609
4610 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4611 {
4612         unsigned int savep;
4613         uint32_t attrlen, bitmap[3];
4614         int status;
4615
4616         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4617                 goto xdr_error;
4618         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4619                 goto xdr_error;
4620         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4621                 goto xdr_error;
4622
4623         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4624
4625         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4626                 goto xdr_error;
4627         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4628                 goto xdr_error;
4629         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4630                 goto xdr_error;
4631         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4632         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4633                 goto xdr_error;
4634         fsinfo->wtpref = fsinfo->wtmax;
4635         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4636         if (status != 0)
4637                 goto xdr_error;
4638         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4639         if (status != 0)
4640                 goto xdr_error;
4641         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4642         if (status)
4643                 goto xdr_error;
4644
4645         status = verify_attr_len(xdr, savep, attrlen);
4646 xdr_error:
4647         dprintk("%s: xdr returned %d!\n", __func__, -status);
4648         return status;
4649 }
4650
4651 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4652 {
4653         __be32 *p;
4654         uint32_t len;
4655         int status;
4656
4657         /* Zero handle first to allow comparisons */
4658         memset(fh, 0, sizeof(*fh));
4659
4660         status = decode_op_hdr(xdr, OP_GETFH);
4661         if (status)
4662                 return status;
4663
4664         p = xdr_inline_decode(xdr, 4);
4665         if (unlikely(!p))
4666                 goto out_overflow;
4667         len = be32_to_cpup(p);
4668         if (len > NFS4_FHSIZE)
4669                 return -EIO;
4670         fh->size = len;
4671         p = xdr_inline_decode(xdr, len);
4672         if (unlikely(!p))
4673                 goto out_overflow;
4674         memcpy(fh->data, p, len);
4675         return 0;
4676 out_overflow:
4677         print_overflow_msg(__func__, xdr);
4678         return -EIO;
4679 }
4680
4681 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4682 {
4683         int status;
4684
4685         status = decode_op_hdr(xdr, OP_LINK);
4686         if (status)
4687                 return status;
4688         return decode_change_info(xdr, cinfo);
4689 }
4690
4691 /*
4692  * We create the owner, so we know a proper owner.id length is 4.
4693  */
4694 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4695 {
4696         uint64_t offset, length, clientid;
4697         __be32 *p;
4698         uint32_t namelen, type;
4699
4700         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4701         if (unlikely(!p))
4702                 goto out_overflow;
4703         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4704         p = xdr_decode_hyper(p, &length);
4705         type = be32_to_cpup(p++); /* 4 byte read */
4706         if (fl != NULL) { /* manipulate file lock */
4707                 fl->fl_start = (loff_t)offset;
4708                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4709                 if (length == ~(uint64_t)0)
4710                         fl->fl_end = OFFSET_MAX;
4711                 fl->fl_type = F_WRLCK;
4712                 if (type & 1)
4713                         fl->fl_type = F_RDLCK;
4714                 fl->fl_pid = 0;
4715         }
4716         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4717         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4718         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4719         if (likely(p))
4720                 return -NFS4ERR_DENIED;
4721 out_overflow:
4722         print_overflow_msg(__func__, xdr);
4723         return -EIO;
4724 }
4725
4726 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4727 {
4728         int status;
4729
4730         status = decode_op_hdr(xdr, OP_LOCK);
4731         if (status == -EIO)
4732                 goto out;
4733         if (status == 0) {
4734                 status = decode_stateid(xdr, &res->stateid);
4735                 if (unlikely(status))
4736                         goto out;
4737         } else if (status == -NFS4ERR_DENIED)
4738                 status = decode_lock_denied(xdr, NULL);
4739         if (res->open_seqid != NULL)
4740                 nfs_increment_open_seqid(status, res->open_seqid);
4741         nfs_increment_lock_seqid(status, res->lock_seqid);
4742 out:
4743         return status;
4744 }
4745
4746 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4747 {
4748         int status;
4749         status = decode_op_hdr(xdr, OP_LOCKT);
4750         if (status == -NFS4ERR_DENIED)
4751                 return decode_lock_denied(xdr, res->denied);
4752         return status;
4753 }
4754
4755 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4756 {
4757         int status;
4758
4759         status = decode_op_hdr(xdr, OP_LOCKU);
4760         if (status != -EIO)
4761                 nfs_increment_lock_seqid(status, res->seqid);
4762         if (status == 0)
4763                 status = decode_stateid(xdr, &res->stateid);
4764         return status;
4765 }
4766
4767 static int decode_release_lockowner(struct xdr_stream *xdr)
4768 {
4769         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4770 }
4771
4772 static int decode_lookup(struct xdr_stream *xdr)
4773 {
4774         return decode_op_hdr(xdr, OP_LOOKUP);
4775 }
4776
4777 /* This is too sick! */
4778 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4779 {
4780         __be32 *p;
4781         uint32_t limit_type, nblocks, blocksize;
4782
4783         p = xdr_inline_decode(xdr, 12);
4784         if (unlikely(!p))
4785                 goto out_overflow;
4786         limit_type = be32_to_cpup(p++);
4787         switch (limit_type) {
4788         case 1:
4789                 xdr_decode_hyper(p, maxsize);
4790                 break;
4791         case 2:
4792                 nblocks = be32_to_cpup(p++);
4793                 blocksize = be32_to_cpup(p);
4794                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4795         }
4796         return 0;
4797 out_overflow:
4798         print_overflow_msg(__func__, xdr);
4799         return -EIO;
4800 }
4801
4802 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4803 {
4804         __be32 *p;
4805         uint32_t delegation_type;
4806         int status;
4807
4808         p = xdr_inline_decode(xdr, 4);
4809         if (unlikely(!p))
4810                 goto out_overflow;
4811         delegation_type = be32_to_cpup(p);
4812         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4813                 res->delegation_type = 0;
4814                 return 0;
4815         }
4816         status = decode_stateid(xdr, &res->delegation);
4817         if (unlikely(status))
4818                 return status;
4819         p = xdr_inline_decode(xdr, 4);
4820         if (unlikely(!p))
4821                 goto out_overflow;
4822         res->do_recall = be32_to_cpup(p);
4823
4824         switch (delegation_type) {
4825         case NFS4_OPEN_DELEGATE_READ:
4826                 res->delegation_type = FMODE_READ;
4827                 break;
4828         case NFS4_OPEN_DELEGATE_WRITE:
4829                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4830                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4831                                 return -EIO;
4832         }
4833         return decode_ace(xdr, NULL, res->server->nfs_client);
4834 out_overflow:
4835         print_overflow_msg(__func__, xdr);
4836         return -EIO;
4837 }
4838
4839 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4840 {
4841         __be32 *p;
4842         uint32_t savewords, bmlen, i;
4843         int status;
4844
4845         status = decode_op_hdr(xdr, OP_OPEN);
4846         if (status != -EIO)
4847                 nfs_increment_open_seqid(status, res->seqid);
4848         if (!status)
4849                 status = decode_stateid(xdr, &res->stateid);
4850         if (unlikely(status))
4851                 return status;
4852
4853         decode_change_info(xdr, &res->cinfo);
4854
4855         p = xdr_inline_decode(xdr, 8);
4856         if (unlikely(!p))
4857                 goto out_overflow;
4858         res->rflags = be32_to_cpup(p++);
4859         bmlen = be32_to_cpup(p);
4860         if (bmlen > 10)
4861                 goto xdr_error;
4862
4863         p = xdr_inline_decode(xdr, bmlen << 2);
4864         if (unlikely(!p))
4865                 goto out_overflow;
4866         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4867         for (i = 0; i < savewords; ++i)
4868                 res->attrset[i] = be32_to_cpup(p++);
4869         for (; i < NFS4_BITMAP_SIZE; i++)
4870                 res->attrset[i] = 0;
4871
4872         return decode_delegation(xdr, res);
4873 xdr_error:
4874         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4875         return -EIO;
4876 out_overflow:
4877         print_overflow_msg(__func__, xdr);
4878         return -EIO;
4879 }
4880
4881 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4882 {
4883         int status;
4884
4885         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4886         if (status != -EIO)
4887                 nfs_increment_open_seqid(status, res->seqid);
4888         if (!status)
4889                 status = decode_stateid(xdr, &res->stateid);
4890         return status;
4891 }
4892
4893 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4894 {
4895         int status;
4896
4897         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4898         if (status != -EIO)
4899                 nfs_increment_open_seqid(status, res->seqid);
4900         if (!status)
4901                 status = decode_stateid(xdr, &res->stateid);
4902         return status;
4903 }
4904
4905 static int decode_putfh(struct xdr_stream *xdr)
4906 {
4907         return decode_op_hdr(xdr, OP_PUTFH);
4908 }
4909
4910 static int decode_putrootfh(struct xdr_stream *xdr)
4911 {
4912         return decode_op_hdr(xdr, OP_PUTROOTFH);
4913 }
4914
4915 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4916 {
4917         __be32 *p;
4918         uint32_t count, eof, recvd;
4919         int status;
4920
4921         status = decode_op_hdr(xdr, OP_READ);
4922         if (status)
4923                 return status;
4924         p = xdr_inline_decode(xdr, 8);
4925         if (unlikely(!p))
4926                 goto out_overflow;
4927         eof = be32_to_cpup(p++);
4928         count = be32_to_cpup(p);
4929         recvd = xdr_read_pages(xdr, count);
4930         if (count > recvd) {
4931                 dprintk("NFS: server cheating in read reply: "
4932                                 "count %u > recvd %u\n", count, recvd);
4933                 count = recvd;
4934                 eof = 0;
4935         }
4936         res->eof = eof;
4937         res->count = count;
4938         return 0;
4939 out_overflow:
4940         print_overflow_msg(__func__, xdr);
4941         return -EIO;
4942 }
4943
4944 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4945 {
4946         int             status;
4947         __be32          verf[2];
4948
4949         status = decode_op_hdr(xdr, OP_READDIR);
4950         if (!status)
4951                 status = decode_verifier(xdr, readdir->verifier.data);
4952         if (unlikely(status))
4953                 return status;
4954         memcpy(verf, readdir->verifier.data, sizeof(verf));
4955         dprintk("%s: verifier = %08x:%08x\n",
4956                         __func__, verf[0], verf[1]);
4957         return xdr_read_pages(xdr, xdr->buf->page_len);
4958 }
4959
4960 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4961 {
4962         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4963         u32 len, recvd;
4964         __be32 *p;
4965         int status;
4966
4967         status = decode_op_hdr(xdr, OP_READLINK);
4968         if (status)
4969                 return status;
4970
4971         /* Convert length of symlink */
4972         p = xdr_inline_decode(xdr, 4);
4973         if (unlikely(!p))
4974                 goto out_overflow;
4975         len = be32_to_cpup(p);
4976         if (len >= rcvbuf->page_len || len <= 0) {
4977                 dprintk("nfs: server returned giant symlink!\n");
4978                 return -ENAMETOOLONG;
4979         }
4980         recvd = xdr_read_pages(xdr, len);
4981         if (recvd < len) {
4982                 dprintk("NFS: server cheating in readlink reply: "
4983                                 "count %u > recvd %u\n", len, recvd);
4984                 return -EIO;
4985         }
4986         /*
4987          * The XDR encode routine has set things up so that
4988          * the link text will be copied directly into the
4989          * buffer.  We just have to do overflow-checking,
4990          * and and null-terminate the text (the VFS expects
4991          * null-termination).
4992          */
4993         xdr_terminate_string(rcvbuf, len);
4994         return 0;
4995 out_overflow:
4996         print_overflow_msg(__func__, xdr);
4997         return -EIO;
4998 }
4999
5000 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5001 {
5002         int status;
5003
5004         status = decode_op_hdr(xdr, OP_REMOVE);
5005         if (status)
5006                 goto out;
5007         status = decode_change_info(xdr, cinfo);
5008 out:
5009         return status;
5010 }
5011
5012 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5013               struct nfs4_change_info *new_cinfo)
5014 {
5015         int status;
5016
5017         status = decode_op_hdr(xdr, OP_RENAME);
5018         if (status)
5019                 goto out;
5020         if ((status = decode_change_info(xdr, old_cinfo)))
5021                 goto out;
5022         status = decode_change_info(xdr, new_cinfo);
5023 out:
5024         return status;
5025 }
5026
5027 static int decode_renew(struct xdr_stream *xdr)
5028 {
5029         return decode_op_hdr(xdr, OP_RENEW);
5030 }
5031
5032 static int
5033 decode_restorefh(struct xdr_stream *xdr)
5034 {
5035         return decode_op_hdr(xdr, OP_RESTOREFH);
5036 }
5037
5038 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5039                          struct nfs_getaclres *res)
5040 {
5041         unsigned int savep;
5042         uint32_t attrlen,
5043                  bitmap[3] = {0};
5044         int status;
5045         unsigned int pg_offset;
5046
5047         res->acl_len = 0;
5048         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5049                 goto out;
5050
5051         xdr_enter_page(xdr, xdr->buf->page_len);
5052
5053         /* Calculate the offset of the page data */
5054         pg_offset = xdr->buf->head[0].iov_len;
5055
5056         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5057                 goto out;
5058         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5059                 goto out;
5060
5061         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5062                 return -EIO;
5063         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5064
5065                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5066                  * are stored with the acl data to handle the problem of
5067                  * variable length bitmaps.*/
5068                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5069                 res->acl_len = attrlen;
5070
5071                 /* Check for receive buffer overflow */
5072                 if (res->acl_len > (xdr->nwords << 2) ||
5073                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5074                         res->acl_flags |= NFS4_ACL_TRUNC;
5075                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5076                                         attrlen, xdr->nwords << 2);
5077                 }
5078         } else
5079                 status = -EOPNOTSUPP;
5080
5081 out:
5082         return status;
5083 }
5084
5085 static int
5086 decode_savefh(struct xdr_stream *xdr)
5087 {
5088         return decode_op_hdr(xdr, OP_SAVEFH);
5089 }
5090
5091 static int decode_setattr(struct xdr_stream *xdr)
5092 {
5093         __be32 *p;
5094         uint32_t bmlen;
5095         int status;
5096
5097         status = decode_op_hdr(xdr, OP_SETATTR);
5098         if (status)
5099                 return status;
5100         p = xdr_inline_decode(xdr, 4);
5101         if (unlikely(!p))
5102                 goto out_overflow;
5103         bmlen = be32_to_cpup(p);
5104         p = xdr_inline_decode(xdr, bmlen << 2);
5105         if (likely(p))
5106                 return 0;
5107 out_overflow:
5108         print_overflow_msg(__func__, xdr);
5109         return -EIO;
5110 }
5111
5112 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5113 {
5114         __be32 *p;
5115         uint32_t opnum;
5116         int32_t nfserr;
5117
5118         p = xdr_inline_decode(xdr, 8);
5119         if (unlikely(!p))
5120                 goto out_overflow;
5121         opnum = be32_to_cpup(p++);
5122         if (opnum != OP_SETCLIENTID) {
5123                 dprintk("nfs: decode_setclientid: Server returned operation"
5124                         " %d\n", opnum);
5125                 return -EIO;
5126         }
5127         nfserr = be32_to_cpup(p);
5128         if (nfserr == NFS_OK) {
5129                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5130                 if (unlikely(!p))
5131                         goto out_overflow;
5132                 p = xdr_decode_hyper(p, &res->clientid);
5133                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5134         } else if (nfserr == NFSERR_CLID_INUSE) {
5135                 uint32_t len;
5136
5137                 /* skip netid string */
5138                 p = xdr_inline_decode(xdr, 4);
5139                 if (unlikely(!p))
5140                         goto out_overflow;
5141                 len = be32_to_cpup(p);
5142                 p = xdr_inline_decode(xdr, len);
5143                 if (unlikely(!p))
5144                         goto out_overflow;
5145
5146                 /* skip uaddr string */
5147                 p = xdr_inline_decode(xdr, 4);
5148                 if (unlikely(!p))
5149                         goto out_overflow;
5150                 len = be32_to_cpup(p);
5151                 p = xdr_inline_decode(xdr, len);
5152                 if (unlikely(!p))
5153                         goto out_overflow;
5154                 return -NFSERR_CLID_INUSE;
5155         } else
5156                 return nfs4_stat_to_errno(nfserr);
5157
5158         return 0;
5159 out_overflow:
5160         print_overflow_msg(__func__, xdr);
5161         return -EIO;
5162 }
5163
5164 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5165 {
5166         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5167 }
5168
5169 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5170 {
5171         __be32 *p;
5172         int status;
5173
5174         status = decode_op_hdr(xdr, OP_WRITE);
5175         if (status)
5176                 return status;
5177
5178         p = xdr_inline_decode(xdr, 8);
5179         if (unlikely(!p))
5180                 goto out_overflow;
5181         res->count = be32_to_cpup(p++);
5182         res->verf->committed = be32_to_cpup(p++);
5183         return decode_write_verifier(xdr, &res->verf->verifier);
5184 out_overflow:
5185         print_overflow_msg(__func__, xdr);
5186         return -EIO;
5187 }
5188
5189 static int decode_delegreturn(struct xdr_stream *xdr)
5190 {
5191         return decode_op_hdr(xdr, OP_DELEGRETURN);
5192 }
5193
5194 static int decode_secinfo_gss(struct xdr_stream *xdr,
5195                               struct nfs4_secinfo4 *flavor)
5196 {
5197         u32 oid_len;
5198         __be32 *p;
5199
5200         p = xdr_inline_decode(xdr, 4);
5201         if (unlikely(!p))
5202                 goto out_overflow;
5203         oid_len = be32_to_cpup(p);
5204         if (oid_len > GSS_OID_MAX_LEN)
5205                 goto out_err;
5206
5207         p = xdr_inline_decode(xdr, oid_len);
5208         if (unlikely(!p))
5209                 goto out_overflow;
5210         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5211         flavor->flavor_info.oid.len = oid_len;
5212
5213         p = xdr_inline_decode(xdr, 8);
5214         if (unlikely(!p))
5215                 goto out_overflow;
5216         flavor->flavor_info.qop = be32_to_cpup(p++);
5217         flavor->flavor_info.service = be32_to_cpup(p);
5218
5219         return 0;
5220
5221 out_overflow:
5222         print_overflow_msg(__func__, xdr);
5223         return -EIO;
5224 out_err:
5225         return -EINVAL;
5226 }
5227
5228 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5229 {
5230         struct nfs4_secinfo4 *sec_flavor;
5231         unsigned int i, num_flavors;
5232         int status;
5233         __be32 *p;
5234
5235         p = xdr_inline_decode(xdr, 4);
5236         if (unlikely(!p))
5237                 goto out_overflow;
5238
5239         res->flavors->num_flavors = 0;
5240         num_flavors = be32_to_cpup(p);
5241
5242         for (i = 0; i < num_flavors; i++) {
5243                 sec_flavor = &res->flavors->flavors[i];
5244                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5245                         break;
5246
5247                 p = xdr_inline_decode(xdr, 4);
5248                 if (unlikely(!p))
5249                         goto out_overflow;
5250                 sec_flavor->flavor = be32_to_cpup(p);
5251
5252                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5253                         status = decode_secinfo_gss(xdr, sec_flavor);
5254                         if (status)
5255                                 goto out;
5256                 }
5257                 res->flavors->num_flavors++;
5258         }
5259
5260         status = 0;
5261 out:
5262         return status;
5263 out_overflow:
5264         print_overflow_msg(__func__, xdr);
5265         return -EIO;
5266 }
5267
5268 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5269 {
5270         int status = decode_op_hdr(xdr, OP_SECINFO);
5271         if (status)
5272                 return status;
5273         return decode_secinfo_common(xdr, res);
5274 }
5275
5276 #if defined(CONFIG_NFS_V4_1)
5277 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5278 {
5279         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5280         if (status)
5281                 return status;
5282         return decode_secinfo_common(xdr, res);
5283 }
5284
5285 static int decode_exchange_id(struct xdr_stream *xdr,
5286                               struct nfs41_exchange_id_res *res)
5287 {
5288         __be32 *p;
5289         uint32_t dummy;
5290         char *dummy_str;
5291         int status;
5292         uint32_t impl_id_count;
5293
5294         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5295         if (status)
5296                 return status;
5297
5298         p = xdr_inline_decode(xdr, 8);
5299         if (unlikely(!p))
5300                 goto out_overflow;
5301         xdr_decode_hyper(p, &res->clientid);
5302         p = xdr_inline_decode(xdr, 12);
5303         if (unlikely(!p))
5304                 goto out_overflow;
5305         res->seqid = be32_to_cpup(p++);
5306         res->flags = be32_to_cpup(p++);
5307
5308         /* We ask for SP4_NONE */
5309         dummy = be32_to_cpup(p);
5310         if (dummy != SP4_NONE)
5311                 return -EIO;
5312
5313         /* server_owner4.so_minor_id */
5314         p = xdr_inline_decode(xdr, 8);
5315         if (unlikely(!p))
5316                 goto out_overflow;
5317         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5318
5319         /* server_owner4.so_major_id */
5320         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5321         if (unlikely(status))
5322                 return status;
5323         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5324                 return -EIO;
5325         memcpy(res->server_owner->major_id, dummy_str, dummy);
5326         res->server_owner->major_id_sz = dummy;
5327
5328         /* server_scope4 */
5329         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5330         if (unlikely(status))
5331                 return status;
5332         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5333                 return -EIO;
5334         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5335         res->server_scope->server_scope_sz = dummy;
5336
5337         /* Implementation Id */
5338         p = xdr_inline_decode(xdr, 4);
5339         if (unlikely(!p))
5340                 goto out_overflow;
5341         impl_id_count = be32_to_cpup(p++);
5342
5343         if (impl_id_count) {
5344                 /* nii_domain */
5345                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5346                 if (unlikely(status))
5347                         return status;
5348                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5349                         return -EIO;
5350                 memcpy(res->impl_id->domain, dummy_str, dummy);
5351
5352                 /* nii_name */
5353                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5354                 if (unlikely(status))
5355                         return status;
5356                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5357                         return -EIO;
5358                 memcpy(res->impl_id->name, dummy_str, dummy);
5359
5360                 /* nii_date */
5361                 p = xdr_inline_decode(xdr, 12);
5362                 if (unlikely(!p))
5363                         goto out_overflow;
5364                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5365                 res->impl_id->date.nseconds = be32_to_cpup(p);
5366
5367                 /* if there's more than one entry, ignore the rest */
5368         }
5369         return 0;
5370 out_overflow:
5371         print_overflow_msg(__func__, xdr);
5372         return -EIO;
5373 }
5374
5375 static int decode_chan_attrs(struct xdr_stream *xdr,
5376                              struct nfs4_channel_attrs *attrs)
5377 {
5378         __be32 *p;
5379         u32 nr_attrs, val;
5380
5381         p = xdr_inline_decode(xdr, 28);
5382         if (unlikely(!p))
5383                 goto out_overflow;
5384         val = be32_to_cpup(p++);        /* headerpadsz */
5385         if (val)
5386                 return -EINVAL;         /* no support for header padding yet */
5387         attrs->max_rqst_sz = be32_to_cpup(p++);
5388         attrs->max_resp_sz = be32_to_cpup(p++);
5389         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5390         attrs->max_ops = be32_to_cpup(p++);
5391         attrs->max_reqs = be32_to_cpup(p++);
5392         nr_attrs = be32_to_cpup(p);
5393         if (unlikely(nr_attrs > 1)) {
5394                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5395                         "count %u\n", __func__, nr_attrs);
5396                 return -EINVAL;
5397         }
5398         if (nr_attrs == 1) {
5399                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5400                 if (unlikely(!p))
5401                         goto out_overflow;
5402         }
5403         return 0;
5404 out_overflow:
5405         print_overflow_msg(__func__, xdr);
5406         return -EIO;
5407 }
5408
5409 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5410 {
5411         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5412 }
5413
5414 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5415                                 struct nfs41_bind_conn_to_session_res *res)
5416 {
5417         __be32 *p;
5418         int status;
5419
5420         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5421         if (!status)
5422                 status = decode_sessionid(xdr, &res->session->sess_id);
5423         if (unlikely(status))
5424                 return status;
5425
5426         /* dir flags, rdma mode bool */
5427         p = xdr_inline_decode(xdr, 8);
5428         if (unlikely(!p))
5429                 goto out_overflow;
5430
5431         res->dir = be32_to_cpup(p++);
5432         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5433                 return -EIO;
5434         if (be32_to_cpup(p) == 0)
5435                 res->use_conn_in_rdma_mode = false;
5436         else
5437                 res->use_conn_in_rdma_mode = true;
5438
5439         return 0;
5440 out_overflow:
5441         print_overflow_msg(__func__, xdr);
5442         return -EIO;
5443 }
5444
5445 static int decode_create_session(struct xdr_stream *xdr,
5446                                  struct nfs41_create_session_res *res)
5447 {
5448         __be32 *p;
5449         int status;
5450         struct nfs_client *clp = res->client;
5451         struct nfs4_session *session = clp->cl_session;
5452
5453         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5454         if (!status)
5455                 status = decode_sessionid(xdr, &session->sess_id);
5456         if (unlikely(status))
5457                 return status;
5458
5459         /* seqid, flags */
5460         p = xdr_inline_decode(xdr, 8);
5461         if (unlikely(!p))
5462                 goto out_overflow;
5463         clp->cl_seqid = be32_to_cpup(p++);
5464         session->flags = be32_to_cpup(p);
5465
5466         /* Channel attributes */
5467         status = decode_chan_attrs(xdr, &session->fc_attrs);
5468         if (!status)
5469                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5470         return status;
5471 out_overflow:
5472         print_overflow_msg(__func__, xdr);
5473         return -EIO;
5474 }
5475
5476 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5477 {
5478         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5479 }
5480
5481 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5482 {
5483         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5484 }
5485
5486 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5487 {
5488         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5489 }
5490 #endif /* CONFIG_NFS_V4_1 */
5491
5492 static int decode_sequence(struct xdr_stream *xdr,
5493                            struct nfs4_sequence_res *res,
5494                            struct rpc_rqst *rqstp)
5495 {
5496 #if defined(CONFIG_NFS_V4_1)
5497         struct nfs4_session *session;
5498         struct nfs4_sessionid id;
5499         u32 dummy;
5500         int status;
5501         __be32 *p;
5502
5503         if (res->sr_slot == NULL)
5504                 return 0;
5505
5506         status = decode_op_hdr(xdr, OP_SEQUENCE);
5507         if (!status)
5508                 status = decode_sessionid(xdr, &id);
5509         if (unlikely(status))
5510                 goto out_err;
5511
5512         /*
5513          * If the server returns different values for sessionID, slotID or
5514          * sequence number, the server is looney tunes.
5515          */
5516         status = -EREMOTEIO;
5517         session = res->sr_slot->table->session;
5518
5519         if (memcmp(id.data, session->sess_id.data,
5520                    NFS4_MAX_SESSIONID_LEN)) {
5521                 dprintk("%s Invalid session id\n", __func__);
5522                 goto out_err;
5523         }
5524
5525         p = xdr_inline_decode(xdr, 20);
5526         if (unlikely(!p))
5527                 goto out_overflow;
5528
5529         /* seqid */
5530         dummy = be32_to_cpup(p++);
5531         if (dummy != res->sr_slot->seq_nr) {
5532                 dprintk("%s Invalid sequence number\n", __func__);
5533                 goto out_err;
5534         }
5535         /* slot id */
5536         dummy = be32_to_cpup(p++);
5537         if (dummy != res->sr_slot->slot_nr) {
5538                 dprintk("%s Invalid slot id\n", __func__);
5539                 goto out_err;
5540         }
5541         /* highest slot id */
5542         res->sr_highest_slotid = be32_to_cpup(p++);
5543         /* target highest slot id */
5544         res->sr_target_highest_slotid = be32_to_cpup(p++);
5545         /* result flags */
5546         res->sr_status_flags = be32_to_cpup(p);
5547         status = 0;
5548 out_err:
5549         res->sr_status = status;
5550         return status;
5551 out_overflow:
5552         print_overflow_msg(__func__, xdr);
5553         status = -EIO;
5554         goto out_err;
5555 #else  /* CONFIG_NFS_V4_1 */
5556         return 0;
5557 #endif /* CONFIG_NFS_V4_1 */
5558 }
5559
5560 #if defined(CONFIG_NFS_V4_1)
5561 /*
5562  * TODO: Need to handle case when EOF != true;
5563  */
5564 static int decode_getdevicelist(struct xdr_stream *xdr,
5565                                 struct pnfs_devicelist *res)
5566 {
5567         __be32 *p;
5568         int status, i;
5569         nfs4_verifier verftemp;
5570
5571         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5572         if (status)
5573                 return status;
5574
5575         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5576         if (unlikely(!p))
5577                 goto out_overflow;
5578
5579         /* TODO: Skip cookie for now */
5580         p += 2;
5581
5582         /* Read verifier */
5583         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5584
5585         res->num_devs = be32_to_cpup(p);
5586
5587         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5588
5589         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5590                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5591                                 __func__, res->num_devs);
5592                 return -EIO;
5593         }
5594
5595         p = xdr_inline_decode(xdr,
5596                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5597         if (unlikely(!p))
5598                 goto out_overflow;
5599         for (i = 0; i < res->num_devs; i++)
5600                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5601                                             NFS4_DEVICEID4_SIZE);
5602         res->eof = be32_to_cpup(p);
5603         return 0;
5604 out_overflow:
5605         print_overflow_msg(__func__, xdr);
5606         return -EIO;
5607 }
5608
5609 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5610                                 struct pnfs_device *pdev)
5611 {
5612         __be32 *p;
5613         uint32_t len, type;
5614         int status;
5615
5616         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5617         if (status) {
5618                 if (status == -ETOOSMALL) {
5619                         p = xdr_inline_decode(xdr, 4);
5620                         if (unlikely(!p))
5621                                 goto out_overflow;
5622                         pdev->mincount = be32_to_cpup(p);
5623                         dprintk("%s: Min count too small. mincnt = %u\n",
5624                                 __func__, pdev->mincount);
5625                 }
5626                 return status;
5627         }
5628
5629         p = xdr_inline_decode(xdr, 8);
5630         if (unlikely(!p))
5631                 goto out_overflow;
5632         type = be32_to_cpup(p++);
5633         if (type != pdev->layout_type) {
5634                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5635                         __func__, pdev->layout_type, type);
5636                 return -EINVAL;
5637         }
5638         /*
5639          * Get the length of the opaque device_addr4. xdr_read_pages places
5640          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5641          * and places the remaining xdr data in xdr_buf->tail
5642          */
5643         pdev->mincount = be32_to_cpup(p);
5644         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5645                 goto out_overflow;
5646
5647         /* Parse notification bitmap, verifying that it is zero. */
5648         p = xdr_inline_decode(xdr, 4);
5649         if (unlikely(!p))
5650                 goto out_overflow;
5651         len = be32_to_cpup(p);
5652         if (len) {
5653                 uint32_t i;
5654
5655                 p = xdr_inline_decode(xdr, 4 * len);
5656                 if (unlikely(!p))
5657                         goto out_overflow;
5658                 for (i = 0; i < len; i++, p++) {
5659                         if (be32_to_cpup(p)) {
5660                                 dprintk("%s: notifications not supported\n",
5661                                         __func__);
5662                                 return -EIO;
5663                         }
5664                 }
5665         }
5666         return 0;
5667 out_overflow:
5668         print_overflow_msg(__func__, xdr);
5669         return -EIO;
5670 }
5671
5672 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5673                             struct nfs4_layoutget_res *res)
5674 {
5675         __be32 *p;
5676         int status;
5677         u32 layout_count;
5678         u32 recvd;
5679
5680         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5681         if (status)
5682                 return status;
5683         p = xdr_inline_decode(xdr, 4);
5684         if (unlikely(!p))
5685                 goto out_overflow;
5686         res->return_on_close = be32_to_cpup(p);
5687         decode_stateid(xdr, &res->stateid);
5688         p = xdr_inline_decode(xdr, 4);
5689         if (unlikely(!p))
5690                 goto out_overflow;
5691         layout_count = be32_to_cpup(p);
5692         if (!layout_count) {
5693                 dprintk("%s: server responded with empty layout array\n",
5694                         __func__);
5695                 return -EINVAL;
5696         }
5697
5698         p = xdr_inline_decode(xdr, 28);
5699         if (unlikely(!p))
5700                 goto out_overflow;
5701         p = xdr_decode_hyper(p, &res->range.offset);
5702         p = xdr_decode_hyper(p, &res->range.length);
5703         res->range.iomode = be32_to_cpup(p++);
5704         res->type = be32_to_cpup(p++);
5705         res->layoutp->len = be32_to_cpup(p);
5706
5707         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5708                 __func__,
5709                 (unsigned long)res->range.offset,
5710                 (unsigned long)res->range.length,
5711                 res->range.iomode,
5712                 res->type,
5713                 res->layoutp->len);
5714
5715         recvd = xdr_read_pages(xdr, res->layoutp->len);
5716         if (res->layoutp->len > recvd) {
5717                 dprintk("NFS: server cheating in layoutget reply: "
5718                                 "layout len %u > recvd %u\n",
5719                                 res->layoutp->len, recvd);
5720                 return -EINVAL;
5721         }
5722
5723         if (layout_count > 1) {
5724                 /* We only handle a length one array at the moment.  Any
5725                  * further entries are just ignored.  Note that this means
5726                  * the client may see a response that is less than the
5727                  * minimum it requested.
5728                  */
5729                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5730                         __func__, layout_count);
5731         }
5732
5733         return 0;
5734 out_overflow:
5735         print_overflow_msg(__func__, xdr);
5736         return -EIO;
5737 }
5738
5739 static int decode_layoutreturn(struct xdr_stream *xdr,
5740                                struct nfs4_layoutreturn_res *res)
5741 {
5742         __be32 *p;
5743         int status;
5744
5745         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5746         if (status)
5747                 return status;
5748         p = xdr_inline_decode(xdr, 4);
5749         if (unlikely(!p))
5750                 goto out_overflow;
5751         res->lrs_present = be32_to_cpup(p);
5752         if (res->lrs_present)
5753                 status = decode_stateid(xdr, &res->stateid);
5754         return status;
5755 out_overflow:
5756         print_overflow_msg(__func__, xdr);
5757         return -EIO;
5758 }
5759
5760 static int decode_layoutcommit(struct xdr_stream *xdr,
5761                                struct rpc_rqst *req,
5762                                struct nfs4_layoutcommit_res *res)
5763 {
5764         __be32 *p;
5765         __u32 sizechanged;
5766         int status;
5767
5768         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5769         res->status = status;
5770         if (status)
5771                 return status;
5772
5773         p = xdr_inline_decode(xdr, 4);
5774         if (unlikely(!p))
5775                 goto out_overflow;
5776         sizechanged = be32_to_cpup(p);
5777
5778         if (sizechanged) {
5779                 /* throw away new size */
5780                 p = xdr_inline_decode(xdr, 8);
5781                 if (unlikely(!p))
5782                         goto out_overflow;
5783         }
5784         return 0;
5785 out_overflow:
5786         print_overflow_msg(__func__, xdr);
5787         return -EIO;
5788 }
5789
5790 static int decode_test_stateid(struct xdr_stream *xdr,
5791                                struct nfs41_test_stateid_res *res)
5792 {
5793         __be32 *p;
5794         int status;
5795         int num_res;
5796
5797         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5798         if (status)
5799                 return status;
5800
5801         p = xdr_inline_decode(xdr, 4);
5802         if (unlikely(!p))
5803                 goto out_overflow;
5804         num_res = be32_to_cpup(p++);
5805         if (num_res != 1)
5806                 goto out;
5807
5808         p = xdr_inline_decode(xdr, 4);
5809         if (unlikely(!p))
5810                 goto out_overflow;
5811         res->status = be32_to_cpup(p++);
5812
5813         return status;
5814 out_overflow:
5815         print_overflow_msg(__func__, xdr);
5816 out:
5817         return -EIO;
5818 }
5819
5820 static int decode_free_stateid(struct xdr_stream *xdr,
5821                                struct nfs41_free_stateid_res *res)
5822 {
5823         __be32 *p;
5824         int status;
5825
5826         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5827         if (status)
5828                 return status;
5829
5830         p = xdr_inline_decode(xdr, 4);
5831         if (unlikely(!p))
5832                 goto out_overflow;
5833         res->status = be32_to_cpup(p++);
5834         return res->status;
5835 out_overflow:
5836         print_overflow_msg(__func__, xdr);
5837         return -EIO;
5838 }
5839 #endif /* CONFIG_NFS_V4_1 */
5840
5841 /*
5842  * END OF "GENERIC" DECODE ROUTINES.
5843  */
5844
5845 /*
5846  * Decode OPEN_DOWNGRADE response
5847  */
5848 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5849                                        struct xdr_stream *xdr,
5850                                        struct nfs_closeres *res)
5851 {
5852         struct compound_hdr hdr;
5853         int status;
5854
5855         status = decode_compound_hdr(xdr, &hdr);
5856         if (status)
5857                 goto out;
5858         status = decode_sequence(xdr, &res->seq_res, rqstp);
5859         if (status)
5860                 goto out;
5861         status = decode_putfh(xdr);
5862         if (status)
5863                 goto out;
5864         status = decode_open_downgrade(xdr, res);
5865         if (status != 0)
5866                 goto out;
5867         decode_getfattr(xdr, res->fattr, res->server);
5868 out:
5869         return status;
5870 }
5871
5872 /*
5873  * Decode ACCESS response
5874  */
5875 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5876                                struct nfs4_accessres *res)
5877 {
5878         struct compound_hdr hdr;
5879         int status;
5880
5881         status = decode_compound_hdr(xdr, &hdr);
5882         if (status)
5883                 goto out;
5884         status = decode_sequence(xdr, &res->seq_res, rqstp);
5885         if (status)
5886                 goto out;
5887         status = decode_putfh(xdr);
5888         if (status != 0)
5889                 goto out;
5890         status = decode_access(xdr, &res->supported, &res->access);
5891         if (status != 0)
5892                 goto out;
5893         decode_getfattr(xdr, res->fattr, res->server);
5894 out:
5895         return status;
5896 }
5897
5898 /*
5899  * Decode LOOKUP response
5900  */
5901 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5902                                struct nfs4_lookup_res *res)
5903 {
5904         struct compound_hdr hdr;
5905         int status;
5906
5907         status = decode_compound_hdr(xdr, &hdr);
5908         if (status)
5909                 goto out;
5910         status = decode_sequence(xdr, &res->seq_res, rqstp);
5911         if (status)
5912                 goto out;
5913         status = decode_putfh(xdr);
5914         if (status)
5915                 goto out;
5916         status = decode_lookup(xdr);
5917         if (status)
5918                 goto out;
5919         status = decode_getfh(xdr, res->fh);
5920         if (status)
5921                 goto out;
5922         status = decode_getfattr(xdr, res->fattr, res->server);
5923 out:
5924         return status;
5925 }
5926
5927 /*
5928  * Decode LOOKUP_ROOT response
5929  */
5930 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5931                                     struct xdr_stream *xdr,
5932                                     struct nfs4_lookup_res *res)
5933 {
5934         struct compound_hdr hdr;
5935         int status;
5936
5937         status = decode_compound_hdr(xdr, &hdr);
5938         if (status)
5939                 goto out;
5940         status = decode_sequence(xdr, &res->seq_res, rqstp);
5941         if (status)
5942                 goto out;
5943         status = decode_putrootfh(xdr);
5944         if (status)
5945                 goto out;
5946         status = decode_getfh(xdr, res->fh);
5947         if (status == 0)
5948                 status = decode_getfattr(xdr, res->fattr, res->server);
5949 out:
5950         return status;
5951 }
5952
5953 /*
5954  * Decode REMOVE response
5955  */
5956 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5957                                struct nfs_removeres *res)
5958 {
5959         struct compound_hdr hdr;
5960         int status;
5961
5962         status = decode_compound_hdr(xdr, &hdr);
5963         if (status)
5964                 goto out;
5965         status = decode_sequence(xdr, &res->seq_res, rqstp);
5966         if (status)
5967                 goto out;
5968         status = decode_putfh(xdr);
5969         if (status)
5970                 goto out;
5971         status = decode_remove(xdr, &res->cinfo);
5972 out:
5973         return status;
5974 }
5975
5976 /*
5977  * Decode RENAME response
5978  */
5979 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5980                                struct nfs_renameres *res)
5981 {
5982         struct compound_hdr hdr;
5983         int status;
5984
5985         status = decode_compound_hdr(xdr, &hdr);
5986         if (status)
5987                 goto out;
5988         status = decode_sequence(xdr, &res->seq_res, rqstp);
5989         if (status)
5990                 goto out;
5991         status = decode_putfh(xdr);
5992         if (status)
5993                 goto out;
5994         status = decode_savefh(xdr);
5995         if (status)
5996                 goto out;
5997         status = decode_putfh(xdr);
5998         if (status)
5999                 goto out;
6000         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6001 out:
6002         return status;
6003 }
6004
6005 /*
6006  * Decode LINK response
6007  */
6008 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6009                              struct nfs4_link_res *res)
6010 {
6011         struct compound_hdr hdr;
6012         int status;
6013
6014         status = decode_compound_hdr(xdr, &hdr);
6015         if (status)
6016                 goto out;
6017         status = decode_sequence(xdr, &res->seq_res, rqstp);
6018         if (status)
6019                 goto out;
6020         status = decode_putfh(xdr);
6021         if (status)
6022                 goto out;
6023         status = decode_savefh(xdr);
6024         if (status)
6025                 goto out;
6026         status = decode_putfh(xdr);
6027         if (status)
6028                 goto out;
6029         status = decode_link(xdr, &res->cinfo);
6030         if (status)
6031                 goto out;
6032         /*
6033          * Note order: OP_LINK leaves the directory as the current
6034          *             filehandle.
6035          */
6036         status = decode_restorefh(xdr);
6037         if (status)
6038                 goto out;
6039         decode_getfattr(xdr, res->fattr, res->server);
6040 out:
6041         return status;
6042 }
6043
6044 /*
6045  * Decode CREATE response
6046  */
6047 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,