4479f66f8a7348005a6cab205907a74eaf88b731
[pandora-kernel.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/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/sunrpc/gss_api.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55 #include "internal.h"
56 #include "pnfs.h"
57
58 #define NFSDBG_FACILITY         NFSDBG_XDR
59
60 /* Mapping from NFS error code to "errno" error code. */
61 #define errno_NFSERR_IO         EIO
62
63 static int nfs4_stat_to_errno(int);
64
65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
66 #ifdef DEBUG
67 #define NFS4_MAXTAGLEN          20
68 #else
69 #define NFS4_MAXTAGLEN          0
70 #endif
71
72 /* lock,open owner id:
73  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
74  */
75 #define open_owner_id_maxsz     (1 + 1 + 4)
76 #define lock_owner_id_maxsz     (1 + 1 + 4)
77 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
78 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
79 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
80 #define op_encode_hdr_maxsz     (1)
81 #define op_decode_hdr_maxsz     (2)
82 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
84 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
86 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
87                                 (NFS4_FHSIZE >> 2))
88 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
89 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
90 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
91 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
92 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
93                                 ((3+NFS4_FHSIZE) >> 2))
94 #define nfs4_fattr_bitmap_maxsz 4
95 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
96 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
97 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
98 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
100 /* This is based on getfattr, which uses the most attributes: */
101 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
102                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
103 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
104                                 nfs4_fattr_value_maxsz)
105 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
106 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
107                                  1 + 2 + 1 + \
108                                 nfs4_owner_maxsz + \
109                                 nfs4_group_maxsz + \
110                                 4 + 4)
111 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
112 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
113 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
114 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
115 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
116 /* The 5 accounts for the PNFS attributes, and assumes that at most three
117  * layout types will be returned.
118  */
119 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
120                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
121 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
122 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
123 #define encode_setclientid_maxsz \
124                                 (op_encode_hdr_maxsz + \
125                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
126                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
127                                 1 /* sc_prog */ + \
128                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
129                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
130                                 1) /* sc_cb_ident */
131 #define decode_setclientid_maxsz \
132                                 (op_decode_hdr_maxsz + \
133                                 2 + \
134                                 1024) /* large value for CLID_INUSE */
135 #define encode_setclientid_confirm_maxsz \
136                                 (op_encode_hdr_maxsz + \
137                                 3 + (NFS4_VERIFIER_SIZE >> 2))
138 #define decode_setclientid_confirm_maxsz \
139                                 (op_decode_hdr_maxsz)
140 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
141 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
142 #define encode_share_access_maxsz \
143                                 (2)
144 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
145 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
146 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
147 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
148                                 2 + encode_share_access_maxsz + 2 + \
149                                 open_owner_id_maxsz + \
150                                 encode_opentype_maxsz + \
151                                 encode_claim_null_maxsz)
152 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
153 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
154                                 decode_ace_maxsz)
155 #define decode_change_info_maxsz        (5)
156 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
157                                 decode_stateid_maxsz + \
158                                 decode_change_info_maxsz + 1 + \
159                                 nfs4_fattr_bitmap_maxsz + \
160                                 decode_delegation_maxsz)
161 #define encode_open_confirm_maxsz \
162                                 (op_encode_hdr_maxsz + \
163                                  encode_stateid_maxsz + 1)
164 #define decode_open_confirm_maxsz \
165                                 (op_decode_hdr_maxsz + \
166                                  decode_stateid_maxsz)
167 #define encode_open_downgrade_maxsz \
168                                 (op_encode_hdr_maxsz + \
169                                  encode_stateid_maxsz + 1 + \
170                                  encode_share_access_maxsz)
171 #define decode_open_downgrade_maxsz \
172                                 (op_decode_hdr_maxsz + \
173                                  decode_stateid_maxsz)
174 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
175                                  1 + encode_stateid_maxsz)
176 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
177                                  decode_stateid_maxsz)
178 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
179                                  encode_stateid_maxsz + \
180                                  encode_attrs_maxsz)
181 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
182                                  nfs4_fattr_bitmap_maxsz)
183 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
184                                  encode_stateid_maxsz + 3)
185 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
186 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
187                                  2 + encode_verifier_maxsz + 5)
188 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
189                                  decode_verifier_maxsz)
190 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
191 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
192 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
193                                  encode_stateid_maxsz + 4)
194 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
195                                  2 + decode_verifier_maxsz)
196 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
197 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
198                                  decode_verifier_maxsz)
199 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
200                                 nfs4_name_maxsz)
201 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
202                                  decode_change_info_maxsz)
203 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
204                                 2 * nfs4_name_maxsz)
205 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
206                                  decode_change_info_maxsz + \
207                                  decode_change_info_maxsz)
208 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
209                                 nfs4_name_maxsz)
210 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
211 #define encode_lockowner_maxsz  (7)
212 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
213                                  7 + \
214                                  1 + encode_stateid_maxsz + 1 + \
215                                  encode_lockowner_maxsz)
216 #define decode_lock_denied_maxsz \
217                                 (8 + decode_lockowner_maxsz)
218 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
219                                  decode_lock_denied_maxsz)
220 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
221                                 encode_lockowner_maxsz)
222 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
223                                  decode_lock_denied_maxsz)
224 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
225                                  encode_stateid_maxsz + \
226                                  4)
227 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
228                                  decode_stateid_maxsz)
229 #define encode_release_lockowner_maxsz \
230                                 (op_encode_hdr_maxsz + \
231                                  encode_lockowner_maxsz)
232 #define decode_release_lockowner_maxsz \
233                                 (op_decode_hdr_maxsz)
234 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
235 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
236 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
237                                 1 + nfs4_name_maxsz + \
238                                 1 + \
239                                 nfs4_fattr_maxsz)
240 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
241 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
242                                 1 + 2 + nfs4_name_maxsz + \
243                                 encode_attrs_maxsz)
244 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
245                                 decode_change_info_maxsz + \
246                                 nfs4_fattr_bitmap_maxsz)
247 #define encode_statfs_maxsz     (encode_getattr_maxsz)
248 #define decode_statfs_maxsz     (decode_getattr_maxsz)
249 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
250 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
251 #define encode_getacl_maxsz     (encode_getattr_maxsz)
252 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
253                                  nfs4_fattr_bitmap_maxsz + 1)
254 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
255                                  encode_stateid_maxsz + 3)
256 #define decode_setacl_maxsz     (decode_setattr_maxsz)
257 #define encode_fs_locations_maxsz \
258                                 (encode_getattr_maxsz)
259 #define decode_fs_locations_maxsz \
260                                 (0)
261 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
262 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
263
264 #if defined(CONFIG_NFS_V4_1)
265 #define NFS4_MAX_MACHINE_NAME_LEN (64)
266
267 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
268                                 encode_verifier_maxsz + \
269                                 1 /* co_ownerid.len */ + \
270                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
271                                 1 /* flags */ + \
272                                 1 /* spa_how */ + \
273                                 0 /* SP4_NONE (for now) */ + \
274                                 1 /* zero implemetation id array */)
275 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
276                                 2 /* eir_clientid */ + \
277                                 1 /* eir_sequenceid */ + \
278                                 1 /* eir_flags */ + \
279                                 1 /* spr_how */ + \
280                                 0 /* SP4_NONE (for now) */ + \
281                                 2 /* eir_server_owner.so_minor_id */ + \
282                                 /* eir_server_owner.so_major_id<> */ \
283                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
284                                 /* eir_server_scope<> */ \
285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
286                                 1 /* eir_server_impl_id array length */ + \
287                                 0 /* ignored eir_server_impl_id contents */)
288 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
289 #define decode_channel_attrs_maxsz  (6 + \
290                                      1 /* ca_rdma_ird.len */ + \
291                                      1 /* ca_rdma_ird */)
292 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
293                                      2 /* csa_clientid */ + \
294                                      1 /* csa_sequence */ + \
295                                      1 /* csa_flags */ + \
296                                      encode_channel_attrs_maxsz + \
297                                      encode_channel_attrs_maxsz + \
298                                      1 /* csa_cb_program */ + \
299                                      1 /* csa_sec_parms.len (1) */ + \
300                                      1 /* cb_secflavor (AUTH_SYS) */ + \
301                                      1 /* stamp */ + \
302                                      1 /* machinename.len */ + \
303                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
304                                      1 /* uid */ + \
305                                      1 /* gid */ + \
306                                      1 /* gids.len (0) */)
307 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
308                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
309                                      1 /* csr_sequence */ + \
310                                      1 /* csr_flags */ + \
311                                      decode_channel_attrs_maxsz + \
312                                      decode_channel_attrs_maxsz)
313 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
314 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
315 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
316                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
317 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
318                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
319 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
320 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
321 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
322                                 encode_verifier_maxsz)
323 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
324                                 2 /* nfs_cookie4 gdlr_cookie */ + \
325                                 decode_verifier_maxsz \
326                                   /* verifier4 gdlr_verifier */ + \
327                                 1 /* gdlr_deviceid_list count */ + \
328                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
329                                             NFS4_DEVICEID4_SIZE) \
330                                   /* gdlr_deviceid_list */ + \
331                                 1 /* bool gdlr_eof */)
332 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
333                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
334 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
335                                 1 /* layout type */ + \
336                                 1 /* opaque devaddr4 length */ + \
337                                   /* devaddr4 payload is read into page */ \
338                                 1 /* notification bitmap length */ + \
339                                 1 /* notification bitmap */)
340 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
341                                 encode_stateid_maxsz)
342 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
343                                 decode_stateid_maxsz + \
344                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
345 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
346                                 2 /* offset */ + \
347                                 2 /* length */ + \
348                                 1 /* reclaim */ + \
349                                 encode_stateid_maxsz + \
350                                 1 /* new offset (true) */ + \
351                                 2 /* last byte written */ + \
352                                 1 /* nt_timechanged (false) */ + \
353                                 1 /* layoutupdate4 layout type */ + \
354                                 1 /* NULL filelayout layoutupdate4 payload */)
355 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
356 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
357                                 encode_stateid_maxsz + \
358                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
359 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
360                                 1 + decode_stateid_maxsz)
361 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
362 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
363 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
364                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
365 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
366 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
367                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
368 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
369 #else /* CONFIG_NFS_V4_1 */
370 #define encode_sequence_maxsz   0
371 #define decode_sequence_maxsz   0
372 #endif /* CONFIG_NFS_V4_1 */
373
374 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
375 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
376 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
377                                 encode_sequence_maxsz + \
378                                 encode_putfh_maxsz + \
379                                 encode_read_maxsz)
380 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
381                                 decode_sequence_maxsz + \
382                                 decode_putfh_maxsz + \
383                                 decode_read_maxsz)
384 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
385                                 encode_sequence_maxsz + \
386                                 encode_putfh_maxsz + \
387                                 encode_readlink_maxsz)
388 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
389                                 decode_sequence_maxsz + \
390                                 decode_putfh_maxsz + \
391                                 decode_readlink_maxsz)
392 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
393                                 encode_sequence_maxsz + \
394                                 encode_putfh_maxsz + \
395                                 encode_readdir_maxsz)
396 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
397                                 decode_sequence_maxsz + \
398                                 decode_putfh_maxsz + \
399                                 decode_readdir_maxsz)
400 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
401                                 encode_sequence_maxsz + \
402                                 encode_putfh_maxsz + \
403                                 encode_write_maxsz + \
404                                 encode_getattr_maxsz)
405 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
406                                 decode_sequence_maxsz + \
407                                 decode_putfh_maxsz + \
408                                 decode_write_maxsz + \
409                                 decode_getattr_maxsz)
410 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
411                                 encode_sequence_maxsz + \
412                                 encode_putfh_maxsz + \
413                                 encode_commit_maxsz + \
414                                 encode_getattr_maxsz)
415 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
416                                 decode_sequence_maxsz + \
417                                 decode_putfh_maxsz + \
418                                 decode_commit_maxsz + \
419                                 decode_getattr_maxsz)
420 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
421                                 encode_sequence_maxsz + \
422                                 encode_putfh_maxsz + \
423                                 encode_savefh_maxsz + \
424                                 encode_open_maxsz + \
425                                 encode_getfh_maxsz + \
426                                 encode_getattr_maxsz + \
427                                 encode_restorefh_maxsz + \
428                                 encode_getattr_maxsz)
429 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
430                                 decode_sequence_maxsz + \
431                                 decode_putfh_maxsz + \
432                                 decode_savefh_maxsz + \
433                                 decode_open_maxsz + \
434                                 decode_getfh_maxsz + \
435                                 decode_getattr_maxsz + \
436                                 decode_restorefh_maxsz + \
437                                 decode_getattr_maxsz)
438 #define NFS4_enc_open_confirm_sz \
439                                 (compound_encode_hdr_maxsz + \
440                                  encode_putfh_maxsz + \
441                                  encode_open_confirm_maxsz)
442 #define NFS4_dec_open_confirm_sz \
443                                 (compound_decode_hdr_maxsz + \
444                                  decode_putfh_maxsz + \
445                                  decode_open_confirm_maxsz)
446 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
447                                         encode_sequence_maxsz + \
448                                         encode_putfh_maxsz + \
449                                         encode_open_maxsz + \
450                                         encode_getattr_maxsz)
451 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
452                                         decode_sequence_maxsz + \
453                                         decode_putfh_maxsz + \
454                                         decode_open_maxsz + \
455                                         decode_getattr_maxsz)
456 #define NFS4_enc_open_downgrade_sz \
457                                 (compound_encode_hdr_maxsz + \
458                                  encode_sequence_maxsz + \
459                                  encode_putfh_maxsz + \
460                                  encode_open_downgrade_maxsz + \
461                                  encode_getattr_maxsz)
462 #define NFS4_dec_open_downgrade_sz \
463                                 (compound_decode_hdr_maxsz + \
464                                  decode_sequence_maxsz + \
465                                  decode_putfh_maxsz + \
466                                  decode_open_downgrade_maxsz + \
467                                  decode_getattr_maxsz)
468 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
469                                  encode_sequence_maxsz + \
470                                  encode_putfh_maxsz + \
471                                  encode_close_maxsz + \
472                                  encode_getattr_maxsz)
473 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
474                                  decode_sequence_maxsz + \
475                                  decode_putfh_maxsz + \
476                                  decode_close_maxsz + \
477                                  decode_getattr_maxsz)
478 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
479                                  encode_sequence_maxsz + \
480                                  encode_putfh_maxsz + \
481                                  encode_setattr_maxsz + \
482                                  encode_getattr_maxsz)
483 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
484                                  decode_sequence_maxsz + \
485                                  decode_putfh_maxsz + \
486                                  decode_setattr_maxsz + \
487                                  decode_getattr_maxsz)
488 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
489                                 encode_sequence_maxsz + \
490                                 encode_putfh_maxsz + \
491                                 encode_fsinfo_maxsz)
492 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
493                                 decode_sequence_maxsz + \
494                                 decode_putfh_maxsz + \
495                                 decode_fsinfo_maxsz)
496 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
497                                 encode_renew_maxsz)
498 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
499                                 decode_renew_maxsz)
500 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
501                                 encode_setclientid_maxsz)
502 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
503                                 decode_setclientid_maxsz)
504 #define NFS4_enc_setclientid_confirm_sz \
505                                 (compound_encode_hdr_maxsz + \
506                                 encode_setclientid_confirm_maxsz + \
507                                 encode_putrootfh_maxsz + \
508                                 encode_fsinfo_maxsz)
509 #define NFS4_dec_setclientid_confirm_sz \
510                                 (compound_decode_hdr_maxsz + \
511                                 decode_setclientid_confirm_maxsz + \
512                                 decode_putrootfh_maxsz + \
513                                 decode_fsinfo_maxsz)
514 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
515                                 encode_sequence_maxsz + \
516                                 encode_putfh_maxsz + \
517                                 encode_lock_maxsz)
518 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
519                                 decode_sequence_maxsz + \
520                                 decode_putfh_maxsz + \
521                                 decode_lock_maxsz)
522 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
523                                 encode_sequence_maxsz + \
524                                 encode_putfh_maxsz + \
525                                 encode_lockt_maxsz)
526 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
527                                  decode_sequence_maxsz + \
528                                  decode_putfh_maxsz + \
529                                  decode_lockt_maxsz)
530 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
531                                 encode_sequence_maxsz + \
532                                 encode_putfh_maxsz + \
533                                 encode_locku_maxsz)
534 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
535                                 decode_sequence_maxsz + \
536                                 decode_putfh_maxsz + \
537                                 decode_locku_maxsz)
538 #define NFS4_enc_release_lockowner_sz \
539                                 (compound_encode_hdr_maxsz + \
540                                  encode_lockowner_maxsz)
541 #define NFS4_dec_release_lockowner_sz \
542                                 (compound_decode_hdr_maxsz + \
543                                  decode_lockowner_maxsz)
544 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
545                                 encode_sequence_maxsz + \
546                                 encode_putfh_maxsz + \
547                                 encode_access_maxsz + \
548                                 encode_getattr_maxsz)
549 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
550                                 decode_sequence_maxsz + \
551                                 decode_putfh_maxsz + \
552                                 decode_access_maxsz + \
553                                 decode_getattr_maxsz)
554 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
555                                 encode_sequence_maxsz + \
556                                 encode_putfh_maxsz + \
557                                 encode_getattr_maxsz)
558 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
559                                 decode_sequence_maxsz + \
560                                 decode_putfh_maxsz + \
561                                 decode_getattr_maxsz)
562 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
563                                 encode_sequence_maxsz + \
564                                 encode_putfh_maxsz + \
565                                 encode_lookup_maxsz + \
566                                 encode_getattr_maxsz + \
567                                 encode_getfh_maxsz)
568 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
569                                 decode_sequence_maxsz + \
570                                 decode_putfh_maxsz + \
571                                 decode_lookup_maxsz + \
572                                 decode_getattr_maxsz + \
573                                 decode_getfh_maxsz)
574 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
575                                 encode_sequence_maxsz + \
576                                 encode_putrootfh_maxsz + \
577                                 encode_getattr_maxsz + \
578                                 encode_getfh_maxsz)
579 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
580                                 decode_sequence_maxsz + \
581                                 decode_putrootfh_maxsz + \
582                                 decode_getattr_maxsz + \
583                                 decode_getfh_maxsz)
584 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
585                                 encode_sequence_maxsz + \
586                                 encode_putfh_maxsz + \
587                                 encode_remove_maxsz + \
588                                 encode_getattr_maxsz)
589 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
590                                 decode_sequence_maxsz + \
591                                 decode_putfh_maxsz + \
592                                 decode_remove_maxsz + \
593                                 decode_getattr_maxsz)
594 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
595                                 encode_sequence_maxsz + \
596                                 encode_putfh_maxsz + \
597                                 encode_savefh_maxsz + \
598                                 encode_putfh_maxsz + \
599                                 encode_rename_maxsz + \
600                                 encode_getattr_maxsz + \
601                                 encode_restorefh_maxsz + \
602                                 encode_getattr_maxsz)
603 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
604                                 decode_sequence_maxsz + \
605                                 decode_putfh_maxsz + \
606                                 decode_savefh_maxsz + \
607                                 decode_putfh_maxsz + \
608                                 decode_rename_maxsz + \
609                                 decode_getattr_maxsz + \
610                                 decode_restorefh_maxsz + \
611                                 decode_getattr_maxsz)
612 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
613                                 encode_sequence_maxsz + \
614                                 encode_putfh_maxsz + \
615                                 encode_savefh_maxsz + \
616                                 encode_putfh_maxsz + \
617                                 encode_link_maxsz + \
618                                 decode_getattr_maxsz + \
619                                 encode_restorefh_maxsz + \
620                                 decode_getattr_maxsz)
621 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
622                                 decode_sequence_maxsz + \
623                                 decode_putfh_maxsz + \
624                                 decode_savefh_maxsz + \
625                                 decode_putfh_maxsz + \
626                                 decode_link_maxsz + \
627                                 decode_getattr_maxsz + \
628                                 decode_restorefh_maxsz + \
629                                 decode_getattr_maxsz)
630 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
631                                 encode_sequence_maxsz + \
632                                 encode_putfh_maxsz + \
633                                 encode_symlink_maxsz + \
634                                 encode_getattr_maxsz + \
635                                 encode_getfh_maxsz)
636 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
637                                 decode_sequence_maxsz + \
638                                 decode_putfh_maxsz + \
639                                 decode_symlink_maxsz + \
640                                 decode_getattr_maxsz + \
641                                 decode_getfh_maxsz)
642 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
643                                 encode_sequence_maxsz + \
644                                 encode_putfh_maxsz + \
645                                 encode_savefh_maxsz + \
646                                 encode_create_maxsz + \
647                                 encode_getfh_maxsz + \
648                                 encode_getattr_maxsz + \
649                                 encode_restorefh_maxsz + \
650                                 encode_getattr_maxsz)
651 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
652                                 decode_sequence_maxsz + \
653                                 decode_putfh_maxsz + \
654                                 decode_savefh_maxsz + \
655                                 decode_create_maxsz + \
656                                 decode_getfh_maxsz + \
657                                 decode_getattr_maxsz + \
658                                 decode_restorefh_maxsz + \
659                                 decode_getattr_maxsz)
660 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
661                                 encode_sequence_maxsz + \
662                                 encode_putfh_maxsz + \
663                                 encode_getattr_maxsz)
664 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
665                                 decode_sequence_maxsz + \
666                                 decode_putfh_maxsz + \
667                                 decode_getattr_maxsz)
668 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
669                                 encode_sequence_maxsz + \
670                                 encode_putfh_maxsz + \
671                                 encode_statfs_maxsz)
672 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
673                                 decode_sequence_maxsz + \
674                                 decode_putfh_maxsz + \
675                                 decode_statfs_maxsz)
676 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
677                                 encode_sequence_maxsz + \
678                                 encode_putfh_maxsz + \
679                                 encode_getattr_maxsz)
680 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
681                                 decode_sequence_maxsz + \
682                                 decode_putfh_maxsz + \
683                                 decode_getattr_maxsz)
684 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
685                                 encode_sequence_maxsz + \
686                                 encode_putfh_maxsz + \
687                                 encode_delegreturn_maxsz + \
688                                 encode_getattr_maxsz)
689 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
690                                 decode_sequence_maxsz + \
691                                 decode_delegreturn_maxsz + \
692                                 decode_getattr_maxsz)
693 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
694                                 encode_sequence_maxsz + \
695                                 encode_putfh_maxsz + \
696                                 encode_getacl_maxsz)
697 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
698                                 decode_sequence_maxsz + \
699                                 decode_putfh_maxsz + \
700                                 decode_getacl_maxsz)
701 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
702                                 encode_sequence_maxsz + \
703                                 encode_putfh_maxsz + \
704                                 encode_setacl_maxsz)
705 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
706                                 decode_sequence_maxsz + \
707                                 decode_putfh_maxsz + \
708                                 decode_setacl_maxsz)
709 #define NFS4_enc_fs_locations_sz \
710                                 (compound_encode_hdr_maxsz + \
711                                  encode_sequence_maxsz + \
712                                  encode_putfh_maxsz + \
713                                  encode_lookup_maxsz + \
714                                  encode_fs_locations_maxsz)
715 #define NFS4_dec_fs_locations_sz \
716                                 (compound_decode_hdr_maxsz + \
717                                  decode_sequence_maxsz + \
718                                  decode_putfh_maxsz + \
719                                  decode_lookup_maxsz + \
720                                  decode_fs_locations_maxsz)
721 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
722                                 encode_sequence_maxsz + \
723                                 encode_putfh_maxsz + \
724                                 encode_secinfo_maxsz)
725 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
726                                 decode_sequence_maxsz + \
727                                 decode_putfh_maxsz + \
728                                 decode_secinfo_maxsz)
729 #if defined(CONFIG_NFS_V4_1)
730 #define NFS4_enc_exchange_id_sz \
731                                 (compound_encode_hdr_maxsz + \
732                                  encode_exchange_id_maxsz)
733 #define NFS4_dec_exchange_id_sz \
734                                 (compound_decode_hdr_maxsz + \
735                                  decode_exchange_id_maxsz)
736 #define NFS4_enc_create_session_sz \
737                                 (compound_encode_hdr_maxsz + \
738                                  encode_create_session_maxsz)
739 #define NFS4_dec_create_session_sz \
740                                 (compound_decode_hdr_maxsz + \
741                                  decode_create_session_maxsz)
742 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
743                                          encode_destroy_session_maxsz)
744 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
745                                          decode_destroy_session_maxsz)
746 #define NFS4_enc_sequence_sz \
747                                 (compound_decode_hdr_maxsz + \
748                                  encode_sequence_maxsz)
749 #define NFS4_dec_sequence_sz \
750                                 (compound_decode_hdr_maxsz + \
751                                  decode_sequence_maxsz)
752 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
753                                          encode_sequence_maxsz + \
754                                          encode_putrootfh_maxsz + \
755                                          encode_fsinfo_maxsz)
756 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
757                                          decode_sequence_maxsz + \
758                                          decode_putrootfh_maxsz + \
759                                          decode_fsinfo_maxsz)
760 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
761                                          encode_sequence_maxsz + \
762                                          encode_reclaim_complete_maxsz)
763 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
764                                          decode_sequence_maxsz + \
765                                          decode_reclaim_complete_maxsz)
766 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
767                                 encode_sequence_maxsz + \
768                                 encode_putfh_maxsz + \
769                                 encode_getdevicelist_maxsz)
770 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
771                                 decode_sequence_maxsz + \
772                                 decode_putfh_maxsz + \
773                                 decode_getdevicelist_maxsz)
774 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
775                                 encode_sequence_maxsz +\
776                                 encode_getdeviceinfo_maxsz)
777 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
778                                 decode_sequence_maxsz + \
779                                 decode_getdeviceinfo_maxsz)
780 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
781                                 encode_sequence_maxsz + \
782                                 encode_putfh_maxsz +        \
783                                 encode_layoutget_maxsz)
784 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
785                                 decode_sequence_maxsz + \
786                                 decode_putfh_maxsz +        \
787                                 decode_layoutget_maxsz)
788 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
789                                 encode_sequence_maxsz +\
790                                 encode_putfh_maxsz + \
791                                 encode_layoutcommit_maxsz + \
792                                 encode_getattr_maxsz)
793 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
794                                 decode_sequence_maxsz + \
795                                 decode_putfh_maxsz + \
796                                 decode_layoutcommit_maxsz + \
797                                 decode_getattr_maxsz)
798 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
799                                 encode_sequence_maxsz + \
800                                 encode_putfh_maxsz + \
801                                 encode_layoutreturn_maxsz)
802 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
803                                 decode_sequence_maxsz + \
804                                 decode_putfh_maxsz + \
805                                 decode_layoutreturn_maxsz)
806 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
807                                         encode_sequence_maxsz + \
808                                         encode_putrootfh_maxsz +\
809                                         encode_secinfo_no_name_maxsz)
810 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
811                                         decode_sequence_maxsz + \
812                                         decode_putrootfh_maxsz + \
813                                         decode_secinfo_no_name_maxsz)
814 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
815                                          encode_sequence_maxsz + \
816                                          encode_test_stateid_maxsz)
817 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
818                                          decode_sequence_maxsz + \
819                                          decode_test_stateid_maxsz)
820 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
821                                          encode_sequence_maxsz + \
822                                          encode_free_stateid_maxsz)
823 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
824                                          decode_sequence_maxsz + \
825                                          decode_free_stateid_maxsz)
826
827 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
828                                       compound_encode_hdr_maxsz +
829                                       encode_sequence_maxsz +
830                                       encode_putfh_maxsz +
831                                       encode_getattr_maxsz) *
832                                      XDR_UNIT);
833
834 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
835                                      compound_decode_hdr_maxsz +
836                                      decode_sequence_maxsz +
837                                      decode_putfh_maxsz) *
838                                     XDR_UNIT);
839 #endif /* CONFIG_NFS_V4_1 */
840
841 static const umode_t nfs_type2fmt[] = {
842         [NF4BAD] = 0,
843         [NF4REG] = S_IFREG,
844         [NF4DIR] = S_IFDIR,
845         [NF4BLK] = S_IFBLK,
846         [NF4CHR] = S_IFCHR,
847         [NF4LNK] = S_IFLNK,
848         [NF4SOCK] = S_IFSOCK,
849         [NF4FIFO] = S_IFIFO,
850         [NF4ATTRDIR] = 0,
851         [NF4NAMEDATTR] = 0,
852 };
853
854 struct compound_hdr {
855         int32_t         status;
856         uint32_t        nops;
857         __be32 *        nops_p;
858         uint32_t        taglen;
859         char *          tag;
860         uint32_t        replen;         /* expected reply words */
861         u32             minorversion;
862 };
863
864 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
865 {
866         __be32 *p = xdr_reserve_space(xdr, nbytes);
867         BUG_ON(!p);
868         return p;
869 }
870
871 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
872 {
873         __be32 *p;
874
875         p = xdr_reserve_space(xdr, 4 + len);
876         BUG_ON(p == NULL);
877         xdr_encode_opaque(p, str, len);
878 }
879
880 static void encode_compound_hdr(struct xdr_stream *xdr,
881                                 struct rpc_rqst *req,
882                                 struct compound_hdr *hdr)
883 {
884         __be32 *p;
885         struct rpc_auth *auth = req->rq_cred->cr_auth;
886
887         /* initialize running count of expected bytes in reply.
888          * NOTE: the replied tag SHOULD be the same is the one sent,
889          * but this is not required as a MUST for the server to do so. */
890         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
891
892         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
893         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
894         p = reserve_space(xdr, 4 + hdr->taglen + 8);
895         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
896         *p++ = cpu_to_be32(hdr->minorversion);
897         hdr->nops_p = p;
898         *p = cpu_to_be32(hdr->nops);
899 }
900
901 static void encode_nops(struct compound_hdr *hdr)
902 {
903         BUG_ON(hdr->nops > NFS4_MAX_OPS);
904         *hdr->nops_p = htonl(hdr->nops);
905 }
906
907 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
908 {
909         __be32 *p;
910
911         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
912         BUG_ON(p == NULL);
913         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
914 }
915
916 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
917 {
918         char owner_name[IDMAP_NAMESZ];
919         char owner_group[IDMAP_NAMESZ];
920         int owner_namelen = 0;
921         int owner_grouplen = 0;
922         __be32 *p;
923         __be32 *q;
924         int len;
925         uint32_t bmval0 = 0;
926         uint32_t bmval1 = 0;
927
928         /*
929          * We reserve enough space to write the entire attribute buffer at once.
930          * In the worst-case, this would be
931          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
932          *          = 36 bytes, plus any contribution from variable-length fields
933          *            such as owner/group.
934          */
935         len = 16;
936
937         /* Sigh */
938         if (iap->ia_valid & ATTR_SIZE)
939                 len += 8;
940         if (iap->ia_valid & ATTR_MODE)
941                 len += 4;
942         if (iap->ia_valid & ATTR_UID) {
943                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
944                 if (owner_namelen < 0) {
945                         dprintk("nfs: couldn't resolve uid %d to string\n",
946                                         iap->ia_uid);
947                         /* XXX */
948                         strcpy(owner_name, "nobody");
949                         owner_namelen = sizeof("nobody") - 1;
950                         /* goto out; */
951                 }
952                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
953         }
954         if (iap->ia_valid & ATTR_GID) {
955                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
956                 if (owner_grouplen < 0) {
957                         dprintk("nfs: couldn't resolve gid %d to string\n",
958                                         iap->ia_gid);
959                         strcpy(owner_group, "nobody");
960                         owner_grouplen = sizeof("nobody") - 1;
961                         /* goto out; */
962                 }
963                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
964         }
965         if (iap->ia_valid & ATTR_ATIME_SET)
966                 len += 16;
967         else if (iap->ia_valid & ATTR_ATIME)
968                 len += 4;
969         if (iap->ia_valid & ATTR_MTIME_SET)
970                 len += 16;
971         else if (iap->ia_valid & ATTR_MTIME)
972                 len += 4;
973         p = reserve_space(xdr, len);
974
975         /*
976          * We write the bitmap length now, but leave the bitmap and the attribute
977          * buffer length to be backfilled at the end of this routine.
978          */
979         *p++ = cpu_to_be32(2);
980         q = p;
981         p += 3;
982
983         if (iap->ia_valid & ATTR_SIZE) {
984                 bmval0 |= FATTR4_WORD0_SIZE;
985                 p = xdr_encode_hyper(p, iap->ia_size);
986         }
987         if (iap->ia_valid & ATTR_MODE) {
988                 bmval1 |= FATTR4_WORD1_MODE;
989                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
990         }
991         if (iap->ia_valid & ATTR_UID) {
992                 bmval1 |= FATTR4_WORD1_OWNER;
993                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
994         }
995         if (iap->ia_valid & ATTR_GID) {
996                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
997                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
998         }
999         if (iap->ia_valid & ATTR_ATIME_SET) {
1000                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1001                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1002                 *p++ = cpu_to_be32(0);
1003                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1004                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1005         }
1006         else if (iap->ia_valid & ATTR_ATIME) {
1007                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1008                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1009         }
1010         if (iap->ia_valid & ATTR_MTIME_SET) {
1011                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1012                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1013                 *p++ = cpu_to_be32(0);
1014                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1015                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1016         }
1017         else if (iap->ia_valid & ATTR_MTIME) {
1018                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1019                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1020         }
1021
1022         /*
1023          * Now we backfill the bitmap and the attribute buffer length.
1024          */
1025         if (len != ((char *)p - (char *)q) + 4) {
1026                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
1027                                 len, ((char *)p - (char *)q) + 4);
1028                 BUG();
1029         }
1030         len = (char *)p - (char *)q - 12;
1031         *q++ = htonl(bmval0);
1032         *q++ = htonl(bmval1);
1033         *q = htonl(len);
1034
1035 /* out: */
1036 }
1037
1038 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1039 {
1040         __be32 *p;
1041
1042         p = reserve_space(xdr, 8);
1043         *p++ = cpu_to_be32(OP_ACCESS);
1044         *p = cpu_to_be32(access);
1045         hdr->nops++;
1046         hdr->replen += decode_access_maxsz;
1047 }
1048
1049 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1050 {
1051         __be32 *p;
1052
1053         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1054         *p++ = cpu_to_be32(OP_CLOSE);
1055         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1056         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1057         hdr->nops++;
1058         hdr->replen += decode_close_maxsz;
1059 }
1060
1061 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1062 {
1063         __be32 *p;
1064
1065         p = reserve_space(xdr, 16);
1066         *p++ = cpu_to_be32(OP_COMMIT);
1067         p = xdr_encode_hyper(p, args->offset);
1068         *p = cpu_to_be32(args->count);
1069         hdr->nops++;
1070         hdr->replen += decode_commit_maxsz;
1071 }
1072
1073 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1074 {
1075         __be32 *p;
1076
1077         p = reserve_space(xdr, 8);
1078         *p++ = cpu_to_be32(OP_CREATE);
1079         *p = cpu_to_be32(create->ftype);
1080
1081         switch (create->ftype) {
1082         case NF4LNK:
1083                 p = reserve_space(xdr, 4);
1084                 *p = cpu_to_be32(create->u.symlink.len);
1085                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1086                 break;
1087
1088         case NF4BLK: case NF4CHR:
1089                 p = reserve_space(xdr, 8);
1090                 *p++ = cpu_to_be32(create->u.device.specdata1);
1091                 *p = cpu_to_be32(create->u.device.specdata2);
1092                 break;
1093
1094         default:
1095                 break;
1096         }
1097
1098         encode_string(xdr, create->name->len, create->name->name);
1099         hdr->nops++;
1100         hdr->replen += decode_create_maxsz;
1101
1102         encode_attrs(xdr, create->attrs, create->server);
1103 }
1104
1105 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1106 {
1107         __be32 *p;
1108
1109         p = reserve_space(xdr, 12);
1110         *p++ = cpu_to_be32(OP_GETATTR);
1111         *p++ = cpu_to_be32(1);
1112         *p = cpu_to_be32(bitmap);
1113         hdr->nops++;
1114         hdr->replen += decode_getattr_maxsz;
1115 }
1116
1117 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1118 {
1119         __be32 *p;
1120
1121         p = reserve_space(xdr, 16);
1122         *p++ = cpu_to_be32(OP_GETATTR);
1123         *p++ = cpu_to_be32(2);
1124         *p++ = cpu_to_be32(bm0);
1125         *p = cpu_to_be32(bm1);
1126         hdr->nops++;
1127         hdr->replen += decode_getattr_maxsz;
1128 }
1129
1130 static void
1131 encode_getattr_three(struct xdr_stream *xdr,
1132                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1133                      struct compound_hdr *hdr)
1134 {
1135         __be32 *p;
1136
1137         p = reserve_space(xdr, 4);
1138         *p = cpu_to_be32(OP_GETATTR);
1139         if (bm2) {
1140                 p = reserve_space(xdr, 16);
1141                 *p++ = cpu_to_be32(3);
1142                 *p++ = cpu_to_be32(bm0);
1143                 *p++ = cpu_to_be32(bm1);
1144                 *p = cpu_to_be32(bm2);
1145         } else if (bm1) {
1146                 p = reserve_space(xdr, 12);
1147                 *p++ = cpu_to_be32(2);
1148                 *p++ = cpu_to_be32(bm0);
1149                 *p = cpu_to_be32(bm1);
1150         } else {
1151                 p = reserve_space(xdr, 8);
1152                 *p++ = cpu_to_be32(1);
1153                 *p = cpu_to_be32(bm0);
1154         }
1155         hdr->nops++;
1156         hdr->replen += decode_getattr_maxsz;
1157 }
1158
1159 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1160 {
1161         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1162                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1163 }
1164
1165 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1166 {
1167         encode_getattr_three(xdr,
1168                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1169                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1170                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1171                              hdr);
1172 }
1173
1174 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1175 {
1176         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1177                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1178 }
1179
1180 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1181 {
1182         __be32 *p;
1183
1184         p = reserve_space(xdr, 4);
1185         *p = cpu_to_be32(OP_GETFH);
1186         hdr->nops++;
1187         hdr->replen += decode_getfh_maxsz;
1188 }
1189
1190 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         p = reserve_space(xdr, 8 + name->len);
1195         *p++ = cpu_to_be32(OP_LINK);
1196         xdr_encode_opaque(p, name->name, name->len);
1197         hdr->nops++;
1198         hdr->replen += decode_link_maxsz;
1199 }
1200
1201 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1202 {
1203         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1204                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1205         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1206 }
1207
1208 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1209 {
1210         if (fl->fl_end == OFFSET_MAX)
1211                 return ~(uint64_t)0;
1212         return fl->fl_end - fl->fl_start + 1;
1213 }
1214
1215 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1216 {
1217         __be32 *p;
1218
1219         p = reserve_space(xdr, 32);
1220         p = xdr_encode_hyper(p, lowner->clientid);
1221         *p++ = cpu_to_be32(20);
1222         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1223         *p++ = cpu_to_be32(lowner->s_dev);
1224         xdr_encode_hyper(p, lowner->id);
1225 }
1226
1227 /*
1228  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1229  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1230  */
1231 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1232 {
1233         __be32 *p;
1234
1235         p = reserve_space(xdr, 32);
1236         *p++ = cpu_to_be32(OP_LOCK);
1237         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1238         *p++ = cpu_to_be32(args->reclaim);
1239         p = xdr_encode_hyper(p, args->fl->fl_start);
1240         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1241         *p = cpu_to_be32(args->new_lock_owner);
1242         if (args->new_lock_owner){
1243                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1244                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1245                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1246                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1247                 encode_lockowner(xdr, &args->lock_owner);
1248         }
1249         else {
1250                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1251                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1252                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1253         }
1254         hdr->nops++;
1255         hdr->replen += decode_lock_maxsz;
1256 }
1257
1258 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1259 {
1260         __be32 *p;
1261
1262         p = reserve_space(xdr, 24);
1263         *p++ = cpu_to_be32(OP_LOCKT);
1264         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1265         p = xdr_encode_hyper(p, args->fl->fl_start);
1266         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1267         encode_lockowner(xdr, &args->lock_owner);
1268         hdr->nops++;
1269         hdr->replen += decode_lockt_maxsz;
1270 }
1271
1272 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1277         *p++ = cpu_to_be32(OP_LOCKU);
1278         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1279         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1280         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1281         p = xdr_encode_hyper(p, args->fl->fl_start);
1282         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1283         hdr->nops++;
1284         hdr->replen += decode_locku_maxsz;
1285 }
1286
1287 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1288 {
1289         __be32 *p;
1290
1291         p = reserve_space(xdr, 4);
1292         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1293         encode_lockowner(xdr, lowner);
1294         hdr->nops++;
1295         hdr->replen += decode_release_lockowner_maxsz;
1296 }
1297
1298 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1299 {
1300         int len = name->len;
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 8 + len);
1304         *p++ = cpu_to_be32(OP_LOOKUP);
1305         xdr_encode_opaque(p, name->name, len);
1306         hdr->nops++;
1307         hdr->replen += decode_lookup_maxsz;
1308 }
1309
1310 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1311 {
1312         __be32 *p;
1313
1314         p = reserve_space(xdr, 8);
1315         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1316         case FMODE_READ:
1317                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1318                 break;
1319         case FMODE_WRITE:
1320                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1321                 break;
1322         case FMODE_READ|FMODE_WRITE:
1323                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1324                 break;
1325         default:
1326                 *p++ = cpu_to_be32(0);
1327         }
1328         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1329 }
1330
1331 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1332 {
1333         __be32 *p;
1334  /*
1335  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1336  * owner 4 = 32
1337  */
1338         p = reserve_space(xdr, 8);
1339         *p++ = cpu_to_be32(OP_OPEN);
1340         *p = cpu_to_be32(arg->seqid->sequence->counter);
1341         encode_share_access(xdr, arg->fmode);
1342         p = reserve_space(xdr, 32);
1343         p = xdr_encode_hyper(p, arg->clientid);
1344         *p++ = cpu_to_be32(20);
1345         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1346         *p++ = cpu_to_be32(arg->server->s_dev);
1347         xdr_encode_hyper(p, arg->id);
1348 }
1349
1350 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1351 {
1352         __be32 *p;
1353         struct nfs_client *clp;
1354
1355         p = reserve_space(xdr, 4);
1356         switch(arg->open_flags & O_EXCL) {
1357         case 0:
1358                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1359                 encode_attrs(xdr, arg->u.attrs, arg->server);
1360                 break;
1361         default:
1362                 clp = arg->server->nfs_client;
1363                 if (clp->cl_mvops->minor_version > 0) {
1364                         if (nfs4_has_persistent_session(clp)) {
1365                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1366                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1367                         } else {
1368                                 struct iattr dummy;
1369
1370                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1371                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1372                                 dummy.ia_valid = 0;
1373                                 encode_attrs(xdr, &dummy, arg->server);
1374                         }
1375                 } else {
1376                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1377                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1378                 }
1379         }
1380 }
1381
1382 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384         __be32 *p;
1385
1386         p = reserve_space(xdr, 4);
1387         switch (arg->open_flags & O_CREAT) {
1388         case 0:
1389                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1390                 break;
1391         default:
1392                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1393                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1394                 encode_createmode(xdr, arg);
1395         }
1396 }
1397
1398 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch (delegation_type) {
1404         case 0:
1405                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1406                 break;
1407         case FMODE_READ:
1408                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1409                 break;
1410         case FMODE_WRITE|FMODE_READ:
1411                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1412                 break;
1413         default:
1414                 BUG();
1415         }
1416 }
1417
1418 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1419 {
1420         __be32 *p;
1421
1422         p = reserve_space(xdr, 4);
1423         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1424         encode_string(xdr, name->len, name->name);
1425 }
1426
1427 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1428 {
1429         __be32 *p;
1430
1431         p = reserve_space(xdr, 4);
1432         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1433         encode_delegation_type(xdr, type);
1434 }
1435
1436 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1437 {
1438         __be32 *p;
1439
1440         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1441         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1442         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1443         encode_string(xdr, name->len, name->name);
1444 }
1445
1446 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1447 {
1448         encode_openhdr(xdr, arg);
1449         encode_opentype(xdr, arg);
1450         switch (arg->claim) {
1451         case NFS4_OPEN_CLAIM_NULL:
1452                 encode_claim_null(xdr, arg->name);
1453                 break;
1454         case NFS4_OPEN_CLAIM_PREVIOUS:
1455                 encode_claim_previous(xdr, arg->u.delegation_type);
1456                 break;
1457         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1458                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1459                 break;
1460         default:
1461                 BUG();
1462         }
1463         hdr->nops++;
1464         hdr->replen += decode_open_maxsz;
1465 }
1466
1467 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1472         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1473         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1474         *p = cpu_to_be32(arg->seqid->sequence->counter);
1475         hdr->nops++;
1476         hdr->replen += decode_open_confirm_maxsz;
1477 }
1478
1479 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1484         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1485         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1486         *p = cpu_to_be32(arg->seqid->sequence->counter);
1487         encode_share_access(xdr, arg->fmode);
1488         hdr->nops++;
1489         hdr->replen += decode_open_downgrade_maxsz;
1490 }
1491
1492 static void
1493 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1494 {
1495         int len = fh->size;
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 8 + len);
1499         *p++ = cpu_to_be32(OP_PUTFH);
1500         xdr_encode_opaque(p, fh->data, len);
1501         hdr->nops++;
1502         hdr->replen += decode_putfh_maxsz;
1503 }
1504
1505 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(OP_PUTROOTFH);
1511         hdr->nops++;
1512         hdr->replen += decode_putrootfh_maxsz;
1513 }
1514
1515 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1516 {
1517         nfs4_stateid stateid;
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1521         if (ctx->state != NULL) {
1522                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1523                 if (zero_seqid)
1524                         stateid.stateid.seqid = 0;
1525                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1526         } else
1527                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1528 }
1529
1530 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 4);
1535         *p = cpu_to_be32(OP_READ);
1536
1537         encode_stateid(xdr, args->context, args->lock_context,
1538                        hdr->minorversion);
1539
1540         p = reserve_space(xdr, 12);
1541         p = xdr_encode_hyper(p, args->offset);
1542         *p = cpu_to_be32(args->count);
1543         hdr->nops++;
1544         hdr->replen += decode_read_maxsz;
1545 }
1546
1547 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1548 {
1549         uint32_t attrs[2] = {
1550                 FATTR4_WORD0_RDATTR_ERROR,
1551                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1552         };
1553         uint32_t dircount = readdir->count >> 1;
1554         __be32 *p;
1555
1556         if (readdir->plus) {
1557                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1558                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1559                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1560                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1561                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1562                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1563                 dircount >>= 1;
1564         }
1565         /* Use mounted_on_fileid only if the server supports it */
1566         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1567                 attrs[0] |= FATTR4_WORD0_FILEID;
1568
1569         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1570         *p++ = cpu_to_be32(OP_READDIR);
1571         p = xdr_encode_hyper(p, readdir->cookie);
1572         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1573         *p++ = cpu_to_be32(dircount);
1574         *p++ = cpu_to_be32(readdir->count);
1575         *p++ = cpu_to_be32(2);
1576
1577         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1578         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1579         hdr->nops++;
1580         hdr->replen += decode_readdir_maxsz;
1581         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1582                         __func__,
1583                         (unsigned long long)readdir->cookie,
1584                         ((u32 *)readdir->verifier.data)[0],
1585                         ((u32 *)readdir->verifier.data)[1],
1586                         attrs[0] & readdir->bitmask[0],
1587                         attrs[1] & readdir->bitmask[1]);
1588 }
1589
1590 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592         __be32 *p;
1593
1594         p = reserve_space(xdr, 4);
1595         *p = cpu_to_be32(OP_READLINK);
1596         hdr->nops++;
1597         hdr->replen += decode_readlink_maxsz;
1598 }
1599
1600 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1601 {
1602         __be32 *p;
1603
1604         p = reserve_space(xdr, 8 + name->len);
1605         *p++ = cpu_to_be32(OP_REMOVE);
1606         xdr_encode_opaque(p, name->name, name->len);
1607         hdr->nops++;
1608         hdr->replen += decode_remove_maxsz;
1609 }
1610
1611 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1612 {
1613         __be32 *p;
1614
1615         p = reserve_space(xdr, 4);
1616         *p = cpu_to_be32(OP_RENAME);
1617         encode_string(xdr, oldname->len, oldname->name);
1618         encode_string(xdr, newname->len, newname->name);
1619         hdr->nops++;
1620         hdr->replen += decode_rename_maxsz;
1621 }
1622
1623 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1624 {
1625         __be32 *p;
1626
1627         p = reserve_space(xdr, 12);
1628         *p++ = cpu_to_be32(OP_RENEW);
1629         xdr_encode_hyper(p, client_stateid->cl_clientid);
1630         hdr->nops++;
1631         hdr->replen += decode_renew_maxsz;
1632 }
1633
1634 static void
1635 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1636 {
1637         __be32 *p;
1638
1639         p = reserve_space(xdr, 4);
1640         *p = cpu_to_be32(OP_RESTOREFH);
1641         hdr->nops++;
1642         hdr->replen += decode_restorefh_maxsz;
1643 }
1644
1645 static void
1646 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1647 {
1648         __be32 *p;
1649
1650         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1651         *p++ = cpu_to_be32(OP_SETATTR);
1652         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1653         p = reserve_space(xdr, 2*4);
1654         *p++ = cpu_to_be32(1);
1655         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656         BUG_ON(arg->acl_len % 4);
1657         p = reserve_space(xdr, 4);
1658         *p = cpu_to_be32(arg->acl_len);
1659         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660         hdr->nops++;
1661         hdr->replen += decode_setacl_maxsz;
1662 }
1663
1664 static void
1665 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1666 {
1667         __be32 *p;
1668
1669         p = reserve_space(xdr, 4);
1670         *p = cpu_to_be32(OP_SAVEFH);
1671         hdr->nops++;
1672         hdr->replen += decode_savefh_maxsz;
1673 }
1674
1675 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1676 {
1677         __be32 *p;
1678
1679         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1680         *p++ = cpu_to_be32(OP_SETATTR);
1681         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1682         hdr->nops++;
1683         hdr->replen += decode_setattr_maxsz;
1684         encode_attrs(xdr, arg->iap, server);
1685 }
1686
1687 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1688 {
1689         __be32 *p;
1690
1691         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1692         *p++ = cpu_to_be32(OP_SETCLIENTID);
1693         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1694
1695         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_prog);
1698         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1699         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1700         p = reserve_space(xdr, 4);
1701         *p = cpu_to_be32(setclientid->sc_cb_ident);
1702         hdr->nops++;
1703         hdr->replen += decode_setclientid_maxsz;
1704 }
1705
1706 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709
1710         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1711         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1712         p = xdr_encode_hyper(p, arg->clientid);
1713         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1714         hdr->nops++;
1715         hdr->replen += decode_setclientid_confirm_maxsz;
1716 }
1717
1718 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1719 {
1720         __be32 *p;
1721
1722         p = reserve_space(xdr, 4);
1723         *p = cpu_to_be32(OP_WRITE);
1724
1725         encode_stateid(xdr, args->context, args->lock_context,
1726                        hdr->minorversion);
1727
1728         p = reserve_space(xdr, 16);
1729         p = xdr_encode_hyper(p, args->offset);
1730         *p++ = cpu_to_be32(args->stable);
1731         *p = cpu_to_be32(args->count);
1732
1733         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1734         hdr->nops++;
1735         hdr->replen += decode_write_maxsz;
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         __be32 *p;
1741
1742         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1743
1744         *p++ = cpu_to_be32(OP_DELEGRETURN);
1745         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1746         hdr->nops++;
1747         hdr->replen += decode_delegreturn_maxsz;
1748 }
1749
1750 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751 {
1752         int len = name->len;
1753         __be32 *p;
1754
1755         p = reserve_space(xdr, 8 + len);
1756         *p++ = cpu_to_be32(OP_SECINFO);
1757         xdr_encode_opaque(p, name->name, len);
1758         hdr->nops++;
1759         hdr->replen += decode_secinfo_maxsz;
1760 }
1761
1762 #if defined(CONFIG_NFS_V4_1)
1763 /* NFSv4.1 operations */
1764 static void encode_exchange_id(struct xdr_stream *xdr,
1765                                struct nfs41_exchange_id_args *args,
1766                                struct compound_hdr *hdr)
1767 {
1768         __be32 *p;
1769
1770         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1771         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1772         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1773
1774         encode_string(xdr, args->id_len, args->id);
1775
1776         p = reserve_space(xdr, 12);
1777         *p++ = cpu_to_be32(args->flags);
1778         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1779         *p = cpu_to_be32(0);    /* zero length implementation id array */
1780         hdr->nops++;
1781         hdr->replen += decode_exchange_id_maxsz;
1782 }
1783
1784 static void encode_create_session(struct xdr_stream *xdr,
1785                                   struct nfs41_create_session_args *args,
1786                                   struct compound_hdr *hdr)
1787 {
1788         __be32 *p;
1789         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1790         uint32_t len;
1791         struct nfs_client *clp = args->client;
1792         u32 max_resp_sz_cached;
1793
1794         /*
1795          * Assumes OPEN is the biggest non-idempotent compound.
1796          * 2 is the verifier.
1797          */
1798         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1799                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1800
1801         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1802                         clp->cl_ipaddr);
1803
1804         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1805         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1806         p = xdr_encode_hyper(p, clp->cl_clientid);
1807         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1808         *p++ = cpu_to_be32(args->flags);                        /*flags */
1809
1810         /* Fore Channel */
1811         *p++ = cpu_to_be32(0);                          /* header padding size */
1812         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1813         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1814         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1815         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1816         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1817         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1818
1819         /* Back Channel */
1820         *p++ = cpu_to_be32(0);                          /* header padding size */
1821         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1822         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1823         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1824         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1825         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1826         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1827
1828         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1829         *p++ = cpu_to_be32(1);
1830         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1831
1832         /* authsys_parms rfc1831 */
1833         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1834         p = xdr_encode_opaque(p, machine_name, len);
1835         *p++ = cpu_to_be32(0);                          /* UID */
1836         *p++ = cpu_to_be32(0);                          /* GID */
1837         *p = cpu_to_be32(0);                            /* No more gids */
1838         hdr->nops++;
1839         hdr->replen += decode_create_session_maxsz;
1840 }
1841
1842 static void encode_destroy_session(struct xdr_stream *xdr,
1843                                    struct nfs4_session *session,
1844                                    struct compound_hdr *hdr)
1845 {
1846         __be32 *p;
1847         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1848         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1849         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1850         hdr->nops++;
1851         hdr->replen += decode_destroy_session_maxsz;
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855                                     struct nfs41_reclaim_complete_args *args,
1856                                     struct compound_hdr *hdr)
1857 {
1858         __be32 *p;
1859
1860         p = reserve_space(xdr, 8);
1861         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1862         *p++ = cpu_to_be32(args->one_fs);
1863         hdr->nops++;
1864         hdr->replen += decode_reclaim_complete_maxsz;
1865 }
1866 #endif /* CONFIG_NFS_V4_1 */
1867
1868 static void encode_sequence(struct xdr_stream *xdr,
1869                             const struct nfs4_sequence_args *args,
1870                             struct compound_hdr *hdr)
1871 {
1872 #if defined(CONFIG_NFS_V4_1)
1873         struct nfs4_session *session = args->sa_session;
1874         struct nfs4_slot_table *tp;
1875         struct nfs4_slot *slot;
1876         __be32 *p;
1877
1878         if (!session)
1879                 return;
1880
1881         tp = &session->fc_slot_table;
1882
1883         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1884         slot = tp->slots + args->sa_slotid;
1885
1886         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1887         *p++ = cpu_to_be32(OP_SEQUENCE);
1888
1889         /*
1890          * Sessionid + seqid + slotid + max slotid + cache_this
1891          */
1892         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1893                 "max_slotid=%d cache_this=%d\n",
1894                 __func__,
1895                 ((u32 *)session->sess_id.data)[0],
1896                 ((u32 *)session->sess_id.data)[1],
1897                 ((u32 *)session->sess_id.data)[2],
1898                 ((u32 *)session->sess_id.data)[3],
1899                 slot->seq_nr, args->sa_slotid,
1900                 tp->highest_used_slotid, args->sa_cache_this);
1901         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1902         *p++ = cpu_to_be32(slot->seq_nr);
1903         *p++ = cpu_to_be32(args->sa_slotid);
1904         *p++ = cpu_to_be32(tp->highest_used_slotid);
1905         *p = cpu_to_be32(args->sa_cache_this);
1906         hdr->nops++;
1907         hdr->replen += decode_sequence_maxsz;
1908 #endif /* CONFIG_NFS_V4_1 */
1909 }
1910
1911 #ifdef CONFIG_NFS_V4_1
1912 static void
1913 encode_getdevicelist(struct xdr_stream *xdr,
1914                      const struct nfs4_getdevicelist_args *args,
1915                      struct compound_hdr *hdr)
1916 {
1917         __be32 *p;
1918         nfs4_verifier dummy = {
1919                 .data = "dummmmmy",
1920         };
1921
1922         p = reserve_space(xdr, 20);
1923         *p++ = cpu_to_be32(OP_GETDEVICELIST);
1924         *p++ = cpu_to_be32(args->layoutclass);
1925         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1926         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1927         encode_nfs4_verifier(xdr, &dummy);
1928         hdr->nops++;
1929         hdr->replen += decode_getdevicelist_maxsz;
1930 }
1931
1932 static void
1933 encode_getdeviceinfo(struct xdr_stream *xdr,
1934                      const struct nfs4_getdeviceinfo_args *args,
1935                      struct compound_hdr *hdr)
1936 {
1937         __be32 *p;
1938
1939         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1940         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1941         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942                                     NFS4_DEVICEID4_SIZE);
1943         *p++ = cpu_to_be32(args->pdev->layout_type);
1944         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1945         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1946         hdr->nops++;
1947         hdr->replen += decode_getdeviceinfo_maxsz;
1948 }
1949
1950 static void
1951 encode_layoutget(struct xdr_stream *xdr,
1952                       const struct nfs4_layoutget_args *args,
1953                       struct compound_hdr *hdr)
1954 {
1955         __be32 *p;
1956
1957         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1958         *p++ = cpu_to_be32(OP_LAYOUTGET);
1959         *p++ = cpu_to_be32(0);     /* Signal layout available */
1960         *p++ = cpu_to_be32(args->type);
1961         *p++ = cpu_to_be32(args->range.iomode);
1962         p = xdr_encode_hyper(p, args->range.offset);
1963         p = xdr_encode_hyper(p, args->range.length);
1964         p = xdr_encode_hyper(p, args->minlength);
1965         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1966         *p = cpu_to_be32(args->maxcount);
1967
1968         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1969                 __func__,
1970                 args->type,
1971                 args->range.iomode,
1972                 (unsigned long)args->range.offset,
1973                 (unsigned long)args->range.length,
1974                 args->maxcount);
1975         hdr->nops++;
1976         hdr->replen += decode_layoutget_maxsz;
1977 }
1978
1979 static int
1980 encode_layoutcommit(struct xdr_stream *xdr,
1981                     struct inode *inode,
1982                     const struct nfs4_layoutcommit_args *args,
1983                     struct compound_hdr *hdr)
1984 {
1985         __be32 *p;
1986
1987         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1988                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1989
1990         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1991         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1992         /* Only whole file layouts */
1993         p = xdr_encode_hyper(p, 0); /* offset */
1994         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1995         *p++ = cpu_to_be32(0); /* reclaim */
1996         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1997         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1998         p = xdr_encode_hyper(p, args->lastbytewritten);
1999         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2000         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2001
2002         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2003                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2004                         NFS_I(inode)->layout, xdr, args);
2005         else {
2006                 p = reserve_space(xdr, 4);
2007                 *p = cpu_to_be32(0); /* no layout-type payload */
2008         }
2009
2010         hdr->nops++;
2011         hdr->replen += decode_layoutcommit_maxsz;
2012         return 0;
2013 }
2014
2015 static void
2016 encode_layoutreturn(struct xdr_stream *xdr,
2017                     const struct nfs4_layoutreturn_args *args,
2018                     struct compound_hdr *hdr)
2019 {
2020         __be32 *p;
2021
2022         p = reserve_space(xdr, 20);
2023         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
2024         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2025         *p++ = cpu_to_be32(args->layout_type);
2026         *p++ = cpu_to_be32(IOMODE_ANY);
2027         *p = cpu_to_be32(RETURN_FILE);
2028         p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
2029         p = xdr_encode_hyper(p, 0);
2030         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2031         spin_lock(&args->inode->i_lock);
2032         xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
2033         spin_unlock(&args->inode->i_lock);
2034         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2035                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2036                         NFS_I(args->inode)->layout, xdr, args);
2037         } else {
2038                 p = reserve_space(xdr, 4);
2039                 *p = cpu_to_be32(0);
2040         }
2041         hdr->nops++;
2042         hdr->replen += decode_layoutreturn_maxsz;
2043 }
2044
2045 static int
2046 encode_secinfo_no_name(struct xdr_stream *xdr,
2047                        const struct nfs41_secinfo_no_name_args *args,
2048                        struct compound_hdr *hdr)
2049 {
2050         __be32 *p;
2051         p = reserve_space(xdr, 8);
2052         *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2053         *p++ = cpu_to_be32(args->style);
2054         hdr->nops++;
2055         hdr->replen += decode_secinfo_no_name_maxsz;
2056         return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060                                 struct nfs41_test_stateid_args *args,
2061                                 struct compound_hdr *hdr)
2062 {
2063         __be32 *p;
2064
2065         p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
2066         *p++ = cpu_to_be32(OP_TEST_STATEID);
2067         *p++ = cpu_to_be32(1);
2068         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2069         hdr->nops++;
2070         hdr->replen += decode_test_stateid_maxsz;
2071 }
2072
2073 static void encode_free_stateid(struct xdr_stream *xdr,
2074                                 struct nfs41_free_stateid_args *args,
2075                                 struct compound_hdr *hdr)
2076 {
2077         __be32 *p;
2078         p = reserve_space(xdr, 4 + NFS4_STATEID_SIZE);
2079         *p++ = cpu_to_be32(OP_FREE_STATEID);
2080         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2081         hdr->nops++;
2082         hdr->replen += decode_free_stateid_maxsz;
2083 }
2084 #endif /* CONFIG_NFS_V4_1 */
2085
2086 /*
2087  * END OF "GENERIC" ENCODE ROUTINES.
2088  */
2089
2090 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2091 {
2092 #if defined(CONFIG_NFS_V4_1)
2093         if (args->sa_session)
2094                 return args->sa_session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode an ACCESS request
2101  */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_accessargs *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->fh, &hdr);
2112         encode_access(xdr, args->access, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode LOOKUP request
2119  */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs4_lookup_arg *args)
2122 {
2123         struct compound_hdr hdr = {
2124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125         };
2126
2127         encode_compound_hdr(xdr, req, &hdr);
2128         encode_sequence(xdr, &args->seq_args, &hdr);
2129         encode_putfh(xdr, args->dir_fh, &hdr);
2130         encode_lookup(xdr, args->name, &hdr);
2131         encode_getfh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode LOOKUP_ROOT request
2138  */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140                                      struct xdr_stream *xdr,
2141                                      const struct nfs4_lookup_root_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_putrootfh(xdr, &hdr);
2150         encode_getfh(xdr, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode REMOVE request
2157  */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                 const struct nfs_removeargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_remove(xdr, &args->name, &hdr);
2169         encode_getfattr(xdr, args->bitmask, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode RENAME request
2175  */
2176 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                                 const struct nfs_renameargs *args)
2178 {
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putfh(xdr, args->old_dir, &hdr);
2186         encode_savefh(xdr, &hdr);
2187         encode_putfh(xdr, args->new_dir, &hdr);
2188         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_restorefh(xdr, &hdr);
2191         encode_getfattr(xdr, args->bitmask, &hdr);
2192         encode_nops(&hdr);
2193 }
2194
2195 /*
2196  * Encode LINK request
2197  */
2198 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2199                              const struct nfs4_link_arg *args)
2200 {
2201         struct compound_hdr hdr = {
2202                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203         };
2204
2205         encode_compound_hdr(xdr, req, &hdr);
2206         encode_sequence(xdr, &args->seq_args, &hdr);
2207         encode_putfh(xdr, args->fh, &hdr);
2208         encode_savefh(xdr, &hdr);
2209         encode_putfh(xdr, args->dir_fh, &hdr);
2210         encode_link(xdr, args->name, &hdr);
2211         encode_getfattr(xdr, args->bitmask, &hdr);
2212         encode_restorefh(xdr, &hdr);
2213         encode_getfattr(xdr, args->bitmask, &hdr);
2214         encode_nops(&hdr);
2215 }
2216
2217 /*
2218  * Encode CREATE request
2219  */
2220 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                 const struct nfs4_create_arg *args)
2222 {
2223         struct compound_hdr hdr = {
2224                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225         };
2226
2227         encode_compound_hdr(xdr, req, &hdr);
2228         encode_sequence(xdr, &args->seq_args, &hdr);
2229         encode_putfh(xdr, args->dir_fh, &hdr);
2230         encode_savefh(xdr, &hdr);
2231         encode_create(xdr, args, &hdr);
2232         encode_getfh(xdr, &hdr);
2233         encode_getfattr(xdr, args->bitmask, &hdr);
2234         encode_restorefh(xdr, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode SYMLINK request
2241  */
2242 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                  const struct nfs4_create_arg *args)
2244 {
2245         nfs4_xdr_enc_create(req, xdr, args);
2246 }
2247
2248 /*
2249  * Encode GETATTR request
2250  */
2251 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                                  const struct nfs4_getattr_arg *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode a CLOSE request
2267  */
2268 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2269                                struct nfs_closeargs *args)
2270 {
2271         struct compound_hdr hdr = {
2272                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273         };
2274
2275         encode_compound_hdr(xdr, req, &hdr);
2276         encode_sequence(xdr, &args->seq_args, &hdr);
2277         encode_putfh(xdr, args->fh, &hdr);
2278         encode_close(xdr, args, &hdr);
2279         encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  * Encode an OPEN request
2285  */
2286 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                               struct nfs_openargs *args)
2288 {
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_savefh(xdr, &hdr);
2297         encode_open(xdr, args, &hdr);
2298         encode_getfh(xdr, &hdr);
2299         encode_getfattr(xdr, args->bitmask, &hdr);
2300         encode_restorefh(xdr, &hdr);
2301         encode_getfattr(xdr, args->bitmask, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode an OPEN_CONFIRM request
2307  */
2308 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2309                                       struct xdr_stream *xdr,
2310                                       struct nfs_open_confirmargs *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .nops   = 0,
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_putfh(xdr, args->fh, &hdr);
2318         encode_open_confirm(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN request with no attributes.
2324  */
2325 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2326                                      struct xdr_stream *xdr,
2327                                      struct nfs_openargs *args)
2328 {
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open(xdr, args, &hdr);
2337         encode_getfattr(xdr, args->bitmask, &hdr);
2338         encode_nops(&hdr);
2339 }
2340
2341 /*
2342  * Encode an OPEN_DOWNGRADE request
2343  */
2344 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2345                                         struct xdr_stream *xdr,
2346                                         struct nfs_closeargs *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_open_downgrade(xdr, args, &hdr);
2356         encode_getfattr(xdr, args->bitmask, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCK request
2362  */
2363 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                               struct nfs_lock_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_lock(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a LOCKT request
2379  */
2380 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                struct nfs_lockt_args *args)
2382 {
2383         struct compound_hdr hdr = {
2384                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385         };
2386
2387         encode_compound_hdr(xdr, req, &hdr);
2388         encode_sequence(xdr, &args->seq_args, &hdr);
2389         encode_putfh(xdr, args->fh, &hdr);
2390         encode_lockt(xdr, args, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 /*
2395  * Encode a LOCKU request
2396  */
2397 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2398                                struct nfs_locku_args *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_sequence(xdr, &args->seq_args, &hdr);
2406         encode_putfh(xdr, args->fh, &hdr);
2407         encode_locku(xdr, args, &hdr);
2408         encode_nops(&hdr);
2409 }
2410
2411 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2412                                            struct xdr_stream *xdr,
2413                                         struct nfs_release_lockowner_args *args)
2414 {
2415         struct compound_hdr hdr = {
2416                 .minorversion = 0,
2417         };
2418
2419         encode_compound_hdr(xdr, req, &hdr);
2420         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode a READLINK request
2426  */
2427 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                                   const struct nfs4_readlink *args)
2429 {
2430         struct compound_hdr hdr = {
2431                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432         };
2433
2434         encode_compound_hdr(xdr, req, &hdr);
2435         encode_sequence(xdr, &args->seq_args, &hdr);
2436         encode_putfh(xdr, args->fh, &hdr);
2437         encode_readlink(xdr, args, req, &hdr);
2438
2439         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2440                         args->pgbase, args->pglen);
2441         encode_nops(&hdr);
2442 }
2443
2444 /*
2445  * Encode a READDIR request
2446  */
2447 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2448                                  const struct nfs4_readdir_arg *args)
2449 {
2450         struct compound_hdr hdr = {
2451                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2452         };
2453
2454         encode_compound_hdr(xdr, req, &hdr);
2455         encode_sequence(xdr, &args->seq_args, &hdr);
2456         encode_putfh(xdr, args->fh, &hdr);
2457         encode_readdir(xdr, args, req, &hdr);
2458
2459         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2460                          args->pgbase, args->count);
2461         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2462                         __func__, hdr.replen << 2, args->pages,
2463                         args->pgbase, args->count);
2464         encode_nops(&hdr);
2465 }
2466
2467 /*
2468  * Encode a READ request
2469  */
2470 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2471                               struct nfs_readargs *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_read(xdr, args, &hdr);
2481
2482         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2483                          args->pages, args->pgbase, args->count);
2484         req->rq_rcv_buf.flags |= XDRBUF_READ;
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * Encode an SETATTR request
2490  */
2491 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                  struct nfs_setattrargs *args)
2493 {
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_setattr(xdr, args, args->server, &hdr);
2502         encode_getfattr(xdr, args->bitmask, &hdr);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * Encode a GETACL request
2508  */
2509 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                 struct nfs_getaclargs *args)
2511 {
2512         struct compound_hdr hdr = {
2513                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514         };
2515         uint32_t replen;
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2521         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2522
2523         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2524                 args->acl_pages, args->acl_pgbase, args->acl_len);
2525
2526         encode_nops(&hdr);
2527 }
2528
2529 /*
2530  * Encode a WRITE request
2531  */
2532 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2533                                struct nfs_writeargs *args)
2534 {
2535         struct compound_hdr hdr = {
2536                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2537         };
2538
2539         encode_compound_hdr(xdr, req, &hdr);
2540         encode_sequence(xdr, &args->seq_args, &hdr);
2541         encode_putfh(xdr, args->fh, &hdr);
2542         encode_write(xdr, args, &hdr);
2543         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2544         if (args->bitmask)
2545                 encode_getfattr(xdr, args->bitmask, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  *  a COMMIT request
2551  */
2552 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                 struct nfs_writeargs *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fh, &hdr);
2562         encode_commit(xdr, args, &hdr);
2563         if (args->bitmask)
2564                 encode_getfattr(xdr, args->bitmask, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * FSINFO request
2570  */
2571 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                 struct nfs4_fsinfo_arg *args)
2573 {
2574         struct compound_hdr hdr = {
2575                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2576         };
2577
2578         encode_compound_hdr(xdr, req, &hdr);
2579         encode_sequence(xdr, &args->seq_args, &hdr);
2580         encode_putfh(xdr, args->fh, &hdr);
2581         encode_fsinfo(xdr, args->bitmask, &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * a PATHCONF request
2587  */
2588 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2589                                   const struct nfs4_pathconf_arg *args)
2590 {
2591         struct compound_hdr hdr = {
2592                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593         };
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_sequence(xdr, &args->seq_args, &hdr);
2597         encode_putfh(xdr, args->fh, &hdr);
2598         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2599                            &hdr);
2600         encode_nops(&hdr);
2601 }
2602
2603 /*
2604  * a STATFS request
2605  */
2606 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2607                                 const struct nfs4_statfs_arg *args)
2608 {
2609         struct compound_hdr hdr = {
2610                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2611         };
2612
2613         encode_compound_hdr(xdr, req, &hdr);
2614         encode_sequence(xdr, &args->seq_args, &hdr);
2615         encode_putfh(xdr, args->fh, &hdr);
2616         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2617                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2618         encode_nops(&hdr);
2619 }
2620
2621 /*
2622  * GETATTR_BITMAP request
2623  */
2624 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2625                                      struct xdr_stream *xdr,
2626                                      struct nfs4_server_caps_arg *args)
2627 {
2628         struct compound_hdr hdr = {
2629                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630         };
2631
2632         encode_compound_hdr(xdr, req, &hdr);
2633         encode_sequence(xdr, &args->seq_args, &hdr);
2634         encode_putfh(xdr, args->fhandle, &hdr);
2635         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2636                            FATTR4_WORD0_LINK_SUPPORT|
2637                            FATTR4_WORD0_SYMLINK_SUPPORT|
2638                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2639         encode_nops(&hdr);
2640 }
2641
2642 /*
2643  * a RENEW request
2644  */
2645 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2646                                struct nfs_client *clp)
2647 {
2648         struct compound_hdr hdr = {
2649                 .nops   = 0,
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_renew(xdr, clp, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * a SETCLIENTID request
2659  */
2660 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2661                                      struct xdr_stream *xdr,
2662                                      struct nfs4_setclientid *sc)
2663 {
2664         struct compound_hdr hdr = {
2665                 .nops   = 0,
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_setclientid(xdr, sc, &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * a SETCLIENTID_CONFIRM request
2675  */
2676 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2677                                              struct xdr_stream *xdr,
2678                                              struct nfs4_setclientid_res *arg)
2679 {
2680         struct compound_hdr hdr = {
2681                 .nops   = 0,
2682         };
2683         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2684
2685         encode_compound_hdr(xdr, req, &hdr);
2686         encode_setclientid_confirm(xdr, arg, &hdr);
2687         encode_putrootfh(xdr, &hdr);
2688         encode_fsinfo(xdr, lease_bitmap, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * DELEGRETURN request
2694  */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      const struct nfs4_delegreturnargs *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         encode_delegreturn(xdr, args->stateid, &hdr);
2707         encode_getfattr(xdr, args->bitmask, &hdr);
2708         encode_nops(&hdr);
2709 }
2710
2711 /*
2712  * Encode FS_LOCATIONS request
2713  */
2714 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2715                                       struct xdr_stream *xdr,
2716                                       struct nfs4_fs_locations_arg *args)
2717 {
2718         struct compound_hdr hdr = {
2719                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720         };
2721         uint32_t replen;
2722
2723         encode_compound_hdr(xdr, req, &hdr);
2724         encode_sequence(xdr, &args->seq_args, &hdr);
2725         encode_putfh(xdr, args->dir_fh, &hdr);
2726         encode_lookup(xdr, args->name, &hdr);
2727         replen = hdr.replen;    /* get the attribute into args->page */
2728         encode_fs_locations(xdr, args->bitmask, &hdr);
2729
2730         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2731                         0, PAGE_SIZE);
2732         encode_nops(&hdr);
2733 }
2734
2735 /*
2736  * Encode SECINFO request
2737  */
2738 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2739                                 struct xdr_stream *xdr,
2740                                 struct nfs4_secinfo_arg *args)
2741 {
2742         struct compound_hdr hdr = {
2743                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2744         };
2745
2746         encode_compound_hdr(xdr, req, &hdr);
2747         encode_sequence(xdr, &args->seq_args, &hdr);
2748         encode_putfh(xdr, args->dir_fh, &hdr);
2749         encode_secinfo(xdr, args->name, &hdr);
2750         encode_nops(&hdr);
2751 }
2752
2753 #if defined(CONFIG_NFS_V4_1)
2754 /*
2755  * EXCHANGE_ID request
2756  */
2757 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2758                                      struct xdr_stream *xdr,
2759                                      struct nfs41_exchange_id_args *args)
2760 {
2761         struct compound_hdr hdr = {
2762                 .minorversion = args->client->cl_mvops->minor_version,
2763         };
2764
2765         encode_compound_hdr(xdr, req, &hdr);
2766         encode_exchange_id(xdr, args, &hdr);
2767         encode_nops(&hdr);
2768 }
2769
2770 /*
2771  * a CREATE_SESSION request
2772  */
2773 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2774                                         struct xdr_stream *xdr,
2775                                         struct nfs41_create_session_args *args)
2776 {
2777         struct compound_hdr hdr = {
2778                 .minorversion = args->client->cl_mvops->minor_version,
2779         };
2780
2781         encode_compound_hdr(xdr, req, &hdr);
2782         encode_create_session(xdr, args, &hdr);
2783         encode_nops(&hdr);
2784 }
2785
2786 /*
2787  * a DESTROY_SESSION request
2788  */
2789 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2790                                          struct xdr_stream *xdr,
2791                                          struct nfs4_session *session)
2792 {
2793         struct compound_hdr hdr = {
2794                 .minorversion = session->clp->cl_mvops->minor_version,
2795         };
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_destroy_session(xdr, session, &hdr);
2799         encode_nops(&hdr);
2800 }
2801
2802 /*
2803  * a SEQUENCE request
2804  */
2805 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2806                                   struct nfs4_sequence_args *args)
2807 {
2808         struct compound_hdr hdr = {
2809                 .minorversion = nfs4_xdr_minorversion(args),
2810         };
2811
2812         encode_compound_hdr(xdr, req, &hdr);
2813         encode_sequence(xdr, args, &hdr);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * a GET_LEASE_TIME request
2819  */
2820 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2821                                         struct xdr_stream *xdr,
2822                                         struct nfs4_get_lease_time_args *args)
2823 {
2824         struct compound_hdr hdr = {
2825                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2826         };
2827         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_sequence(xdr, &args->la_seq_args, &hdr);
2831         encode_putrootfh(xdr, &hdr);
2832         encode_fsinfo(xdr, lease_bitmap, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * a RECLAIM_COMPLETE request
2838  */
2839 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2840                                           struct xdr_stream *xdr,
2841                                 struct nfs41_reclaim_complete_args *args)
2842 {
2843         struct compound_hdr hdr = {
2844                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2845         };
2846
2847         encode_compound_hdr(xdr, req, &hdr);
2848         encode_sequence(xdr, &args->seq_args, &hdr);
2849         encode_reclaim_complete(xdr, args, &hdr);
2850         encode_nops(&hdr);
2851 }
2852
2853 /*
2854  * Encode GETDEVICELIST request
2855  */
2856 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2857                                        struct xdr_stream *xdr,
2858                                        struct nfs4_getdevicelist_args *args)
2859 {
2860         struct compound_hdr hdr = {
2861                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2862         };
2863
2864         encode_compound_hdr(xdr, req, &hdr);
2865         encode_sequence(xdr, &args->seq_args, &hdr);
2866         encode_putfh(xdr, args->fh, &hdr);
2867         encode_getdevicelist(xdr, args, &hdr);
2868         encode_nops(&hdr);
2869 }
2870
2871 /*
2872  * Encode GETDEVICEINFO request
2873  */
2874 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2875                                        struct xdr_stream *xdr,
2876                                        struct nfs4_getdeviceinfo_args *args)
2877 {
2878         struct compound_hdr hdr = {
2879                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2880         };
2881
2882         encode_compound_hdr(xdr, req, &hdr);
2883         encode_sequence(xdr, &args->seq_args, &hdr);
2884         encode_getdeviceinfo(xdr, args, &hdr);
2885
2886         /* set up reply kvec. Subtract notification bitmap max size (2)
2887          * so that notification bitmap is put in xdr_buf tail */
2888         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2889                          args->pdev->pages, args->pdev->pgbase,
2890                          args->pdev->pglen);
2891
2892         encode_nops(&hdr);
2893 }
2894
2895 /*
2896  *  Encode LAYOUTGET request
2897  */
2898 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2899                                    struct xdr_stream *xdr,
2900                                    struct nfs4_layoutget_args *args)
2901 {
2902         struct compound_hdr hdr = {
2903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2904         };
2905
2906         encode_compound_hdr(xdr, req, &hdr);
2907         encode_sequence(xdr, &args->seq_args, &hdr);
2908         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2909         encode_layoutget(xdr, args, &hdr);
2910
2911         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2912             args->layout.pages, 0, args->layout.pglen);
2913
2914         encode_nops(&hdr);
2915 }
2916
2917 /*
2918  *  Encode LAYOUTCOMMIT request
2919  */
2920 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2921                                       struct xdr_stream *xdr,
2922                                       struct nfs4_layoutcommit_args *args)
2923 {
2924         struct nfs4_layoutcommit_data *data =
2925                 container_of(args, struct nfs4_layoutcommit_data, args);
2926         struct compound_hdr hdr = {
2927                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2928         };
2929
2930         encode_compound_hdr(xdr, req, &hdr);
2931         encode_sequence(xdr, &args->seq_args, &hdr);
2932         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2933         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2934         encode_getfattr(xdr, args->bitmask, &hdr);
2935         encode_nops(&hdr);
2936 }
2937
2938 /*
2939  * Encode LAYOUTRETURN request
2940  */
2941 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2942                                       struct xdr_stream *xdr,
2943                                       struct nfs4_layoutreturn_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_putfh(xdr, NFS_FH(args->inode), &hdr);
2952         encode_layoutreturn(xdr, args, &hdr);
2953         encode_nops(&hdr);
2954 }
2955
2956 /*
2957  * Encode SECINFO_NO_NAME request
2958  */
2959 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2960                                         struct xdr_stream *xdr,
2961                                         struct nfs41_secinfo_no_name_args *args)
2962 {
2963         struct compound_hdr hdr = {
2964                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2965         };
2966
2967         encode_compound_hdr(xdr, req, &hdr);
2968         encode_sequence(xdr, &args->seq_args, &hdr);
2969         encode_putrootfh(xdr, &hdr);
2970         encode_secinfo_no_name(xdr, args, &hdr);
2971         encode_nops(&hdr);
2972         return 0;
2973 }
2974
2975 /*
2976  *  Encode TEST_STATEID request
2977  */
2978 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2979                                       struct xdr_stream *xdr,
2980                                       struct nfs41_test_stateid_args *args)
2981 {
2982         struct compound_hdr hdr = {
2983                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2984         };
2985
2986         encode_compound_hdr(xdr, req, &hdr);
2987         encode_sequence(xdr, &args->seq_args, &hdr);
2988         encode_test_stateid(xdr, args, &hdr);
2989         encode_nops(&hdr);
2990 }
2991
2992 /*
2993  *  Encode FREE_STATEID request
2994  */
2995 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2996                                      struct xdr_stream *xdr,
2997                                      struct nfs41_free_stateid_args *args)
2998 {
2999         struct compound_hdr hdr = {
3000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3001         };
3002
3003         encode_compound_hdr(xdr, req, &hdr);
3004         encode_sequence(xdr, &args->seq_args, &hdr);
3005         encode_free_stateid(xdr, args, &hdr);
3006         encode_nops(&hdr);
3007 }
3008 #endif /* CONFIG_NFS_V4_1 */
3009
3010 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3011 {
3012         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3013                 "Remaining buffer length is %tu words.\n",
3014                 func, xdr->end - xdr->p);
3015 }
3016
3017 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3018 {
3019         __be32 *p;
3020
3021         p = xdr_inline_decode(xdr, 4);
3022         if (unlikely(!p))
3023                 goto out_overflow;
3024         *len = be32_to_cpup(p);
3025         p = xdr_inline_decode(xdr, *len);
3026         if (unlikely(!p))
3027                 goto out_overflow;
3028         *string = (char *)p;
3029         return 0;
3030 out_overflow:
3031         print_overflow_msg(__func__, xdr);
3032         return -EIO;
3033 }
3034
3035 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3036 {
3037         __be32 *p;
3038
3039         p = xdr_inline_decode(xdr, 8);
3040         if (unlikely(!p))
3041                 goto out_overflow;
3042         hdr->status = be32_to_cpup(p++);
3043         hdr->taglen = be32_to_cpup(p);
3044
3045         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3046         if (unlikely(!p))
3047                 goto out_overflow;
3048         hdr->tag = (char *)p;
3049         p += XDR_QUADLEN(hdr->taglen);
3050         hdr->nops = be32_to_cpup(p);
3051         if (unlikely(hdr->nops < 1))
3052                 return nfs4_stat_to_errno(hdr->status);
3053         return 0;
3054 out_overflow:
3055         print_overflow_msg(__func__, xdr);
3056         return -EIO;
3057 }
3058
3059 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3060                 int *nfs_retval)
3061 {
3062         __be32 *p;
3063         uint32_t opnum;
3064         int32_t nfserr;
3065
3066         p = xdr_inline_decode(xdr, 8);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         opnum = be32_to_cpup(p++);
3070         if (unlikely(opnum != expected))
3071                 goto out_bad_operation;
3072         nfserr = be32_to_cpup(p);
3073         if (nfserr == NFS_OK)
3074                 *nfs_retval = 0;
3075         else
3076                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3077         return true;
3078 out_bad_operation:
3079         dprintk("nfs: Server returned operation"
3080                 " %d but we issued a request for %d\n",
3081                         opnum, expected);
3082         *nfs_retval = -EREMOTEIO;
3083         return false;
3084 out_overflow:
3085         print_overflow_msg(__func__, xdr);
3086         *nfs_retval = -EIO;
3087         return false;
3088 }
3089
3090 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3091 {
3092         int retval;
3093
3094         __decode_op_hdr(xdr, expected, &retval);
3095         return retval;
3096 }
3097
3098 /* Dummy routine */
3099 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3100 {
3101         __be32 *p;
3102         unsigned int strlen;
3103         char *str;
3104
3105         p = xdr_inline_decode(xdr, 12);
3106         if (likely(p))
3107                 return decode_opaque_inline(xdr, &strlen, &str);
3108         print_overflow_msg(__func__, xdr);
3109         return -EIO;
3110 }
3111
3112 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3113 {
3114         uint32_t bmlen;
3115         __be32 *p;
3116
3117         p = xdr_inline_decode(xdr, 4);
3118         if (unlikely(!p))
3119                 goto out_overflow;
3120         bmlen = be32_to_cpup(p);
3121
3122         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3123         p = xdr_inline_decode(xdr, (bmlen << 2));
3124         if (unlikely(!p))
3125                 goto out_overflow;
3126         if (bmlen > 0) {
3127                 bitmap[0] = be32_to_cpup(p++);
3128                 if (bmlen > 1) {
3129                         bitmap[1] = be32_to_cpup(p++);
3130                         if (bmlen > 2)
3131                                 bitmap[2] = be32_to_cpup(p);
3132                 }
3133         }
3134         return 0;
3135 out_overflow:
3136         print_overflow_msg(__func__, xdr);
3137         return -EIO;
3138 }
3139
3140 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3141 {
3142         __be32 *p;
3143
3144         p = xdr_inline_decode(xdr, 4);
3145         if (unlikely(!p))
3146                 goto out_overflow;
3147         *attrlen = be32_to_cpup(p);
3148         *savep = xdr->p;
3149         return 0;
3150 out_overflow:
3151         print_overflow_msg(__func__, xdr);
3152         return -EIO;
3153 }
3154
3155 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3156 {
3157         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3158                 int ret;
3159                 ret = decode_attr_bitmap(xdr, bitmask);
3160                 if (unlikely(ret < 0))
3161                         return ret;
3162                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3163         } else
3164                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3165         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3166                 bitmask[0], bitmask[1], bitmask[2]);
3167         return 0;
3168 }
3169
3170 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3171 {
3172         __be32 *p;
3173         int ret = 0;
3174
3175         *type = 0;
3176         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3177                 return -EIO;
3178         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3179                 p = xdr_inline_decode(xdr, 4);
3180                 if (unlikely(!p))
3181                         goto out_overflow;
3182                 *type = be32_to_cpup(p);
3183                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3184                         dprintk("%s: bad type %d\n", __func__, *type);
3185                         return -EIO;
3186                 }
3187                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3188                 ret = NFS_ATTR_FATTR_TYPE;
3189         }
3190         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3191         return ret;
3192 out_overflow:
3193         print_overflow_msg(__func__, xdr);
3194         return -EIO;
3195 }
3196
3197 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3198 {
3199         __be32 *p;
3200         int ret = 0;
3201
3202         *change = 0;
3203         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3204                 return -EIO;
3205         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3206                 p = xdr_inline_decode(xdr, 8);
3207                 if (unlikely(!p))
3208                         goto out_overflow;
3209                 xdr_decode_hyper(p, change);
3210                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3211                 ret = NFS_ATTR_FATTR_CHANGE;
3212         }
3213         dprintk("%s: change attribute=%Lu\n", __func__,
3214                         (unsigned long long)*change);
3215         return ret;
3216 out_overflow:
3217         print_overflow_msg(__func__, xdr);
3218         return -EIO;
3219 }
3220
3221 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3222 {
3223         __be32 *p;
3224         int ret = 0;
3225
3226         *size = 0;
3227         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3228                 return -EIO;
3229         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3230                 p = xdr_inline_decode(xdr, 8);
3231                 if (unlikely(!p))
3232                         goto out_overflow;
3233                 xdr_decode_hyper(p, size);
3234                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3235                 ret = NFS_ATTR_FATTR_SIZE;
3236         }
3237         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3238         return ret;
3239 out_overflow:
3240         print_overflow_msg(__func__, xdr);
3241         return -EIO;
3242 }
3243
3244 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3245 {
3246         __be32 *p;
3247
3248         *res = 0;
3249         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3250                 return -EIO;
3251         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3252                 p = xdr_inline_decode(xdr, 4);
3253                 if (unlikely(!p))
3254                         goto out_overflow;
3255                 *res = be32_to_cpup(p);
3256                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3257         }
3258         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3259         return 0;
3260 out_overflow:
3261         print_overflow_msg(__func__, xdr);
3262         return -EIO;
3263 }
3264
3265 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3266 {
3267         __be32 *p;
3268
3269         *res = 0;
3270         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3271                 return -EIO;
3272         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3273                 p = xdr_inline_decode(xdr, 4);
3274                 if (unlikely(!p))
3275                         goto out_overflow;
3276                 *res = be32_to_cpup(p);
3277                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3278         }
3279         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3280         return 0;
3281 out_overflow:
3282         print_overflow_msg(__func__, xdr);
3283         return -EIO;
3284 }
3285
3286 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3287 {
3288         __be32 *p;
3289         int ret = 0;
3290
3291         fsid->major = 0;
3292         fsid->minor = 0;
3293         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3294                 return -EIO;
3295         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3296                 p = xdr_inline_decode(xdr, 16);
3297                 if (unlikely(!p))
3298                         goto out_overflow;
3299                 p = xdr_decode_hyper(p, &fsid->major);
3300                 xdr_decode_hyper(p, &fsid->minor);
3301                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3302                 ret = NFS_ATTR_FATTR_FSID;
3303         }
3304         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3305                         (unsigned long long)fsid->major,
3306                         (unsigned long long)fsid->minor);
3307         return ret;
3308 out_overflow:
3309         print_overflow_msg(__func__, xdr);
3310         return -EIO;
3311 }
3312
3313 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3314 {
3315         __be32 *p;
3316
3317         *res = 60;
3318         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3319                 return -EIO;
3320         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3321                 p = xdr_inline_decode(xdr, 4);
3322                 if (unlikely(!p))
3323                         goto out_overflow;
3324                 *res = be32_to_cpup(p);
3325                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3326         }
3327         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3328         return 0;
3329 out_overflow:
3330         print_overflow_msg(__func__, xdr);
3331         return -EIO;
3332 }
3333
3334 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3335 {
3336         __be32 *p;
3337
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3341                 p = xdr_inline_decode(xdr, 4);
3342                 if (unlikely(!p))
3343                         goto out_overflow;
3344                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3345                 *res = -be32_to_cpup(p);
3346         }
3347         return 0;
3348 out_overflow:
3349         print_overflow_msg(__func__, xdr);
3350         return -EIO;
3351 }
3352
3353 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3354 {
3355         __be32 *p;
3356         int len;
3357
3358         if (fh != NULL)
3359                 memset(fh, 0, sizeof(*fh));
3360
3361         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3362                 return -EIO;
3363         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3364                 p = xdr_inline_decode(xdr, 4);
3365                 if (unlikely(!p))
3366                         goto out_overflow;
3367                 len = be32_to_cpup(p);
3368                 if (len > NFS4_FHSIZE)
3369                         return -EIO;
3370                 p = xdr_inline_decode(xdr, len);
3371                 if (unlikely(!p))
3372                         goto out_overflow;
3373                 if (fh != NULL) {
3374                         memcpy(fh->data, p, len);
3375                         fh->size = len;
3376                 }
3377                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3378         }
3379         return 0;
3380 out_overflow:
3381         print_overflow_msg(__func__, xdr);
3382         return -EIO;
3383 }
3384
3385 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3386 {
3387         __be32 *p;
3388
3389         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3390         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3391                 return -EIO;
3392         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3393                 p = xdr_inline_decode(xdr, 4);
3394                 if (unlikely(!p))
3395                         goto out_overflow;
3396                 *res = be32_to_cpup(p);
3397                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3398         }
3399         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3400         return 0;
3401 out_overflow:
3402         print_overflow_msg(__func__, xdr);
3403         return -EIO;
3404 }
3405
3406 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3407 {
3408         __be32 *p;
3409         int ret = 0;
3410
3411         *fileid = 0;
3412         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3413                 return -EIO;
3414         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3415                 p = xdr_inline_decode(xdr, 8);
3416                 if (unlikely(!p))
3417                         goto out_overflow;
3418                 xdr_decode_hyper(p, fileid);
3419                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3420                 ret = NFS_ATTR_FATTR_FILEID;
3421         }
3422         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3423         return ret;
3424 out_overflow:
3425         print_overflow_msg(__func__, xdr);
3426         return -EIO;
3427 }
3428
3429 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3430 {
3431         __be32 *p;
3432         int ret = 0;
3433
3434         *fileid = 0;
3435         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3436                 return -EIO;
3437         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3438                 p = xdr_inline_decode(xdr, 8);
3439                 if (unlikely(!p))
3440                         goto out_overflow;
3441                 xdr_decode_hyper(p, fileid);
3442                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3443                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3444         }
3445         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3446         return ret;
3447 out_overflow:
3448         print_overflow_msg(__func__, xdr);
3449         return -EIO;
3450 }
3451
3452 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3453 {
3454         __be32 *p;
3455         int status = 0;
3456
3457         *res = 0;
3458         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3459                 return -EIO;
3460         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3461                 p = xdr_inline_decode(xdr, 8);
3462                 if (unlikely(!p))
3463                         goto out_overflow;
3464                 xdr_decode_hyper(p, res);
3465                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3466         }
3467         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3468         return status;
3469 out_overflow:
3470         print_overflow_msg(__func__, xdr);
3471         return -EIO;
3472 }
3473
3474 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3475 {
3476         __be32 *p;
3477         int status = 0;
3478
3479         *res = 0;
3480         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3481                 return -EIO;
3482         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3483                 p = xdr_inline_decode(xdr, 8);
3484                 if (unlikely(!p))
3485                         goto out_overflow;
3486                 xdr_decode_hyper(p, res);
3487                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3488         }
3489         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3490         return status;
3491 out_overflow:
3492         print_overflow_msg(__func__, xdr);
3493         return -EIO;
3494 }
3495
3496 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3497 {
3498         __be32 *p;
3499         int status = 0;
3500
3501         *res = 0;
3502         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3503                 return -EIO;
3504         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3505                 p = xdr_inline_decode(xdr, 8);
3506                 if (unlikely(!p))
3507                         goto out_overflow;
3508                 xdr_decode_hyper(p, res);
3509                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3510         }
3511         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3512         return status;
3513 out_overflow:
3514         print_overflow_msg(__func__, xdr);
3515         return -EIO;
3516 }
3517
3518 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3519 {
3520         u32 n;
3521         __be32 *p;
3522         int status = 0;
3523
3524         p = xdr_inline_decode(xdr, 4);
3525         if (unlikely(!p))
3526                 goto out_overflow;
3527         n = be32_to_cpup(p);
3528         if (n == 0)
3529                 goto root_path;
3530         dprintk("path ");
3531         path->ncomponents = 0;
3532         while (path->ncomponents < n) {
3533                 struct nfs4_string *component = &path->components[path->ncomponents];
3534                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3535                 if (unlikely(status != 0))
3536                         goto out_eio;
3537                 if (path->ncomponents != n)
3538                         dprintk("/");
3539                 dprintk("%s", component->data);
3540                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3541                         path->ncomponents++;
3542                 else {
3543                         dprintk("cannot parse %d components in path\n", n);
3544                         goto out_eio;
3545                 }
3546         }
3547 out:
3548         dprintk("\n");
3549         return status;
3550 root_path:
3551 /* a root pathname is sent as a zero component4 */
3552         path->ncomponents = 1;
3553         path->components[0].len=0;
3554         path->components[0].data=NULL;
3555         dprintk("path /\n");
3556         goto out;
3557 out_eio:
3558         dprintk(" status %d", status);
3559         status = -EIO;
3560         goto out;
3561 out_overflow:
3562         print_overflow_msg(__func__, xdr);
3563         return -EIO;
3564 }
3565
3566 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3567 {
3568         int n;
3569         __be32 *p;
3570         int status = -EIO;
3571
3572         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3573                 goto out;
3574         status = 0;
3575         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3576                 goto out;
3577         dprintk("%s: fsroot ", __func__);
3578         status = decode_pathname(xdr, &res->fs_path);
3579         if (unlikely(status != 0))
3580                 goto out;
3581         p = xdr_inline_decode(xdr, 4);
3582         if (unlikely(!p))
3583                 goto out_overflow;
3584         n = be32_to_cpup(p);
3585         if (n <= 0)
3586                 goto out_eio;
3587         res->nlocations = 0;
3588         while (res->nlocations < n) {
3589                 u32 m;
3590                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3591
3592                 p = xdr_inline_decode(xdr, 4);
3593                 if (unlikely(!p))
3594                         goto out_overflow;
3595                 m = be32_to_cpup(p);
3596
3597                 loc->nservers = 0;
3598                 dprintk("%s: servers ", __func__);
3599                 while (loc->nservers < m) {
3600                         struct nfs4_string *server = &loc->servers[loc->nservers];
3601                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3602                         if (unlikely(status != 0))
3603                                 goto out_eio;
3604                         dprintk("%s ", server->data);
3605                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3606                                 loc->nservers++;
3607                         else {
3608                                 unsigned int i;
3609                                 dprintk("%s: using first %u of %u servers "
3610                                         "returned for location %u\n",
3611                                                 __func__,
3612                                                 NFS4_FS_LOCATION_MAXSERVERS,
3613                                                 m, res->nlocations);
3614                                 for (i = loc->nservers; i < m;&n