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TOMOYO Linux Cross Reference
Linux/fs/nfs/nfs4xdr.c

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  1 /*
  2  *  fs/nfs/nfs4xdr.c
  3  *
  4  *  Client-side XDR for NFSv4.
  5  *
  6  *  Copyright (c) 2002 The Regents of the University of Michigan.
  7  *  All rights reserved.
  8  *
  9  *  Kendrick Smith <kmsmith@umich.edu>
 10  *  Andy Adamson   <andros@umich.edu>
 11  *
 12  *  Redistribution and use in source and binary forms, with or without
 13  *  modification, are permitted provided that the following conditions
 14  *  are met:
 15  *
 16  *  1. Redistributions of source code must retain the above copyright
 17  *     notice, this list of conditions and the following disclaimer.
 18  *  2. Redistributions in binary form must reproduce the above copyright
 19  *     notice, this list of conditions and the following disclaimer in the
 20  *     documentation and/or other materials provided with the distribution.
 21  *  3. Neither the name of the University nor the names of its
 22  *     contributors may be used to endorse or promote products derived
 23  *     from this software without specific prior written permission.
 24  *
 25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 36  */
 37 
 38 #include <linux/param.h>
 39 #include <linux/time.h>
 40 #include <linux/mm.h>
 41 #include <linux/errno.h>
 42 #include <linux/string.h>
 43 #include <linux/in.h>
 44 #include <linux/pagemap.h>
 45 #include <linux/proc_fs.h>
 46 #include <linux/kdev_t.h>
 47 #include <linux/module.h>
 48 #include <linux/utsname.h>
 49 #include <linux/sunrpc/clnt.h>
 50 #include <linux/sunrpc/msg_prot.h>
 51 #include <linux/sunrpc/gss_api.h>
 52 #include <linux/nfs.h>
 53 #include <linux/nfs4.h>
 54 #include <linux/nfs_fs.h>
 55 #include <linux/fs_struct.h>
 56 
 57 #include "nfs4_fs.h"
 58 #include "internal.h"
 59 #include "nfs4idmap.h"
 60 #include "nfs4session.h"
 61 #include "pnfs.h"
 62 #include "netns.h"
 63 
 64 #define NFSDBG_FACILITY         NFSDBG_XDR
 65 
 66 /* Mapping from NFS error code to "errno" error code. */
 67 #define errno_NFSERR_IO         EIO
 68 
 69 static int nfs4_stat_to_errno(int);
 70 
 71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
 72 #ifdef DEBUG
 73 #define NFS4_MAXTAGLEN          20
 74 #else
 75 #define NFS4_MAXTAGLEN          0
 76 #endif
 77 
 78 /* lock,open owner id:
 79  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
 80  */
 81 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
 82 #define lock_owner_id_maxsz     (1 + 1 + 4)
 83 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 84 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
 85 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
 86 #define op_encode_hdr_maxsz     (1)
 87 #define op_decode_hdr_maxsz     (2)
 88 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
 89 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
 90 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
 91 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
 92 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
 93                                 (NFS4_FHSIZE >> 2))
 94 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 95 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 96 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 97 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 98 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 99                                 ((3+NFS4_FHSIZE) >> 2))
100 #define nfs4_fattr_bitmap_maxsz 4
101 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
102 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
103 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
104 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
108 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
109 #else
110 #define nfs4_label_maxsz        0
111 #endif
112 /* We support only one layout type per file system */
113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
114 /* This is based on getfattr, which uses the most attributes: */
115 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
116                                 3 + 3 + 3 + nfs4_owner_maxsz + \
117                                 nfs4_group_maxsz + nfs4_label_maxsz + \
118                                  decode_mdsthreshold_maxsz))
119 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
120                                 nfs4_fattr_value_maxsz)
121 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
122 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
123                                  1 + 2 + 1 + \
124                                 nfs4_owner_maxsz + \
125                                 nfs4_group_maxsz + \
126                                 nfs4_label_maxsz + \
127                                 4 + 4)
128 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
129 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
130 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
131 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
132 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
134  * layout types will be returned.
135  */
136 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
137                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
138 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
139 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
140 #define encode_setclientid_maxsz \
141                                 (op_encode_hdr_maxsz + \
142                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
143                                 /* client name */ \
144                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
145                                 1 /* sc_prog */ + \
146                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
147                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
148                                 1) /* sc_cb_ident */
149 #define decode_setclientid_maxsz \
150                                 (op_decode_hdr_maxsz + \
151                                 2 /* clientid */ + \
152                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
153                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
154                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
155 #define encode_setclientid_confirm_maxsz \
156                                 (op_encode_hdr_maxsz + \
157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
158 #define decode_setclientid_confirm_maxsz \
159                                 (op_decode_hdr_maxsz)
160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
162 #define encode_share_access_maxsz \
163                                 (2)
164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
168                                 2 + encode_share_access_maxsz + 2 + \
169                                 open_owner_id_maxsz + \
170                                 encode_opentype_maxsz + \
171                                 encode_claim_null_maxsz)
172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
174                                 decode_ace_maxsz)
175 #define decode_change_info_maxsz        (5)
176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
177                                 decode_stateid_maxsz + \
178                                 decode_change_info_maxsz + 1 + \
179                                 nfs4_fattr_bitmap_maxsz + \
180                                 decode_delegation_maxsz)
181 #define encode_open_confirm_maxsz \
182                                 (op_encode_hdr_maxsz + \
183                                  encode_stateid_maxsz + 1)
184 #define decode_open_confirm_maxsz \
185                                 (op_decode_hdr_maxsz + \
186                                  decode_stateid_maxsz)
187 #define encode_open_downgrade_maxsz \
188                                 (op_encode_hdr_maxsz + \
189                                  encode_stateid_maxsz + 1 + \
190                                  encode_share_access_maxsz)
191 #define decode_open_downgrade_maxsz \
192                                 (op_decode_hdr_maxsz + \
193                                  decode_stateid_maxsz)
194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
195                                  1 + encode_stateid_maxsz)
196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
197                                  decode_stateid_maxsz)
198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
199                                  encode_stateid_maxsz + \
200                                  encode_attrs_maxsz)
201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
202                                  nfs4_fattr_bitmap_maxsz)
203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
204                                  encode_stateid_maxsz + 3)
205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
207                                  2 + encode_verifier_maxsz + 5 + \
208                                 nfs4_label_maxsz)
209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
210                                  decode_verifier_maxsz)
211 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
212 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
213 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
214                                  encode_stateid_maxsz + 4)
215 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
216                                  2 + decode_verifier_maxsz)
217 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
218 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
219                                  decode_verifier_maxsz)
220 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
221                                 nfs4_name_maxsz)
222 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
223                                  decode_change_info_maxsz)
224 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
225                                 2 * nfs4_name_maxsz)
226 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
227                                  decode_change_info_maxsz + \
228                                  decode_change_info_maxsz)
229 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
230                                 nfs4_name_maxsz)
231 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
232 #define encode_lockowner_maxsz  (7)
233 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
234                                  7 + \
235                                  1 + encode_stateid_maxsz + 1 + \
236                                  encode_lockowner_maxsz)
237 #define decode_lock_denied_maxsz \
238                                 (8 + decode_lockowner_maxsz)
239 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
240                                  decode_lock_denied_maxsz)
241 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
242                                 encode_lockowner_maxsz)
243 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
244                                  decode_lock_denied_maxsz)
245 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
246                                  encode_stateid_maxsz + \
247                                  4)
248 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
249                                  decode_stateid_maxsz)
250 #define encode_release_lockowner_maxsz \
251                                 (op_encode_hdr_maxsz + \
252                                  encode_lockowner_maxsz)
253 #define decode_release_lockowner_maxsz \
254                                 (op_decode_hdr_maxsz)
255 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
256 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
257 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
258                                 1 + nfs4_name_maxsz + \
259                                 1 + \
260                                 nfs4_fattr_maxsz)
261 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
262 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
263                                 1 + 2 + nfs4_name_maxsz + \
264                                 encode_attrs_maxsz)
265 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
266                                 decode_change_info_maxsz + \
267                                 nfs4_fattr_bitmap_maxsz)
268 #define encode_statfs_maxsz     (encode_getattr_maxsz)
269 #define decode_statfs_maxsz     (decode_getattr_maxsz)
270 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
271 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
272 #define encode_getacl_maxsz     (encode_getattr_maxsz)
273 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
274                                  nfs4_fattr_bitmap_maxsz + 1)
275 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
276                                  encode_stateid_maxsz + 3)
277 #define decode_setacl_maxsz     (decode_setattr_maxsz)
278 #define encode_fs_locations_maxsz \
279                                 (encode_getattr_maxsz)
280 #define decode_fs_locations_maxsz \
281                                 (0)
282 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
283 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
284 
285 #if defined(CONFIG_NFS_V4_1)
286 #define NFS4_MAX_MACHINE_NAME_LEN (64)
287 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
288                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
289 
290 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
291                                 encode_verifier_maxsz + \
292                                 1 /* co_ownerid.len */ + \
293                                 /* eia_clientowner */ \
294                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
295                                 1 /* flags */ + \
296                                 1 /* spa_how */ + \
297                                 /* max is SP4_MACH_CRED (for now) */ + \
298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
299                                 1 + NFS4_OP_MAP_NUM_WORDS + \
300                                 1 /* implementation id array of size 1 */ + \
301                                 1 /* nii_domain */ + \
302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
303                                 1 /* nii_name */ + \
304                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
305                                 3 /* nii_date */)
306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
307                                 2 /* eir_clientid */ + \
308                                 1 /* eir_sequenceid */ + \
309                                 1 /* eir_flags */ + \
310                                 1 /* spr_how */ + \
311                                   /* max is SP4_MACH_CRED (for now) */ + \
312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
313                                 1 + NFS4_OP_MAP_NUM_WORDS + \
314                                 2 /* eir_server_owner.so_minor_id */ + \
315                                 /* eir_server_owner.so_major_id<> */ \
316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
317                                 /* eir_server_scope<> */ \
318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
319                                 1 /* eir_server_impl_id array length */ + \
320                                 1 /* nii_domain */ + \
321                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
322                                 1 /* nii_name */ + \
323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324                                 3 /* nii_date */)
325 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
326 #define decode_channel_attrs_maxsz  (6 + \
327                                      1 /* ca_rdma_ird.len */ + \
328                                      1 /* ca_rdma_ird */)
329 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
330                                      2 /* csa_clientid */ + \
331                                      1 /* csa_sequence */ + \
332                                      1 /* csa_flags */ + \
333                                      encode_channel_attrs_maxsz + \
334                                      encode_channel_attrs_maxsz + \
335                                      1 /* csa_cb_program */ + \
336                                      1 /* csa_sec_parms.len (1) */ + \
337                                      1 /* cb_secflavor (AUTH_SYS) */ + \
338                                      1 /* stamp */ + \
339                                      1 /* machinename.len */ + \
340                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
341                                      1 /* uid */ + \
342                                      1 /* gid */ + \
343                                      1 /* gids.len (0) */)
344 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
345                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
346                                      1 /* csr_sequence */ + \
347                                      1 /* csr_flags */ + \
348                                      decode_channel_attrs_maxsz + \
349                                      decode_channel_attrs_maxsz)
350 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
351                                      /* bctsa_sessid */ \
352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353                                      1 /* bctsa_dir */ + \
354                                      1 /* bctsa_use_conn_in_rdma_mode */)
355 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
356                                      /* bctsr_sessid */ \
357                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358                                      1 /* bctsr_dir */ + \
359                                      1 /* bctsr_use_conn_in_rdma_mode */)
360 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
361 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
362 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
363 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
364 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
365                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
366 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
368 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
369 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
370 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
371                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
372                                 1 /* layout type */ + \
373                                 1 /* maxcount */ + \
374                                 1 /* bitmap size */ + \
375                                 1 /* notification bitmap length */ + \
376                                 1 /* notification bitmap, word 0 */)
377 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
378                                 1 /* layout type */ + \
379                                 1 /* opaque devaddr4 length */ + \
380                                   /* devaddr4 payload is read into page */ \
381                                 1 /* notification bitmap length */ + \
382                                 1 /* notification bitmap, word 0 */)
383 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
384                                 encode_stateid_maxsz)
385 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
386                                 decode_stateid_maxsz + \
387                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
388 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
389                                 2 /* offset */ + \
390                                 2 /* length */ + \
391                                 1 /* reclaim */ + \
392                                 encode_stateid_maxsz + \
393                                 1 /* new offset (true) */ + \
394                                 2 /* last byte written */ + \
395                                 1 /* nt_timechanged (false) */ + \
396                                 1 /* layoutupdate4 layout type */ + \
397                                 1 /* layoutupdate4 opaqueue len */)
398                                   /* the actual content of layoutupdate4 should
399                                      be allocated by drivers and spliced in
400                                      using xdr_write_pages */
401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
403                                 encode_stateid_maxsz + \
404                                 1 + \
405                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
407                                 1 + decode_stateid_maxsz)
408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
410 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
411                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
412 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
413 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
414                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
415 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
416 #else /* CONFIG_NFS_V4_1 */
417 #define encode_sequence_maxsz   0
418 #define decode_sequence_maxsz   0
419 #define encode_layoutreturn_maxsz 0
420 #define decode_layoutreturn_maxsz 0
421 #endif /* CONFIG_NFS_V4_1 */
422 
423 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
424 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
425 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
426                                 encode_sequence_maxsz + \
427                                 encode_putfh_maxsz + \
428                                 encode_read_maxsz)
429 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
430                                 decode_sequence_maxsz + \
431                                 decode_putfh_maxsz + \
432                                 decode_read_maxsz)
433 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
434                                 encode_sequence_maxsz + \
435                                 encode_putfh_maxsz + \
436                                 encode_readlink_maxsz)
437 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
438                                 decode_sequence_maxsz + \
439                                 decode_putfh_maxsz + \
440                                 decode_readlink_maxsz)
441 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
442                                 encode_sequence_maxsz + \
443                                 encode_putfh_maxsz + \
444                                 encode_readdir_maxsz)
445 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
446                                 decode_sequence_maxsz + \
447                                 decode_putfh_maxsz + \
448                                 decode_readdir_maxsz)
449 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
450                                 encode_sequence_maxsz + \
451                                 encode_putfh_maxsz + \
452                                 encode_write_maxsz + \
453                                 encode_getattr_maxsz)
454 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
455                                 decode_sequence_maxsz + \
456                                 decode_putfh_maxsz + \
457                                 decode_write_maxsz + \
458                                 decode_getattr_maxsz)
459 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
460                                 encode_sequence_maxsz + \
461                                 encode_putfh_maxsz + \
462                                 encode_commit_maxsz)
463 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
464                                 decode_sequence_maxsz + \
465                                 decode_putfh_maxsz + \
466                                 decode_commit_maxsz)
467 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
468                                 encode_sequence_maxsz + \
469                                 encode_putfh_maxsz + \
470                                 encode_open_maxsz + \
471                                 encode_access_maxsz + \
472                                 encode_getfh_maxsz + \
473                                 encode_getattr_maxsz)
474 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
475                                 decode_sequence_maxsz + \
476                                 decode_putfh_maxsz + \
477                                 decode_open_maxsz + \
478                                 decode_access_maxsz + \
479                                 decode_getfh_maxsz + \
480                                 decode_getattr_maxsz)
481 #define NFS4_enc_open_confirm_sz \
482                                 (compound_encode_hdr_maxsz + \
483                                  encode_putfh_maxsz + \
484                                  encode_open_confirm_maxsz)
485 #define NFS4_dec_open_confirm_sz \
486                                 (compound_decode_hdr_maxsz + \
487                                  decode_putfh_maxsz + \
488                                  decode_open_confirm_maxsz)
489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
490                                         encode_sequence_maxsz + \
491                                         encode_putfh_maxsz + \
492                                         encode_open_maxsz + \
493                                         encode_access_maxsz + \
494                                         encode_getattr_maxsz)
495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
496                                         decode_sequence_maxsz + \
497                                         decode_putfh_maxsz + \
498                                         decode_open_maxsz + \
499                                         decode_access_maxsz + \
500                                         decode_getattr_maxsz)
501 #define NFS4_enc_open_downgrade_sz \
502                                 (compound_encode_hdr_maxsz + \
503                                  encode_sequence_maxsz + \
504                                  encode_putfh_maxsz + \
505                                  encode_layoutreturn_maxsz + \
506                                  encode_open_downgrade_maxsz)
507 #define NFS4_dec_open_downgrade_sz \
508                                 (compound_decode_hdr_maxsz + \
509                                  decode_sequence_maxsz + \
510                                  decode_putfh_maxsz + \
511                                  decode_layoutreturn_maxsz + \
512                                  decode_open_downgrade_maxsz)
513 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
514                                  encode_sequence_maxsz + \
515                                  encode_putfh_maxsz + \
516                                  encode_layoutreturn_maxsz + \
517                                  encode_close_maxsz + \
518                                  encode_getattr_maxsz)
519 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
520                                  decode_sequence_maxsz + \
521                                  decode_putfh_maxsz + \
522                                  decode_layoutreturn_maxsz + \
523                                  decode_close_maxsz + \
524                                  decode_getattr_maxsz)
525 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
526                                  encode_sequence_maxsz + \
527                                  encode_putfh_maxsz + \
528                                  encode_setattr_maxsz + \
529                                  encode_getattr_maxsz)
530 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
531                                  decode_sequence_maxsz + \
532                                  decode_putfh_maxsz + \
533                                  decode_setattr_maxsz + \
534                                  decode_getattr_maxsz)
535 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
536                                 encode_sequence_maxsz + \
537                                 encode_putfh_maxsz + \
538                                 encode_fsinfo_maxsz)
539 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
540                                 decode_sequence_maxsz + \
541                                 decode_putfh_maxsz + \
542                                 decode_fsinfo_maxsz)
543 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
544                                 encode_renew_maxsz)
545 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
546                                 decode_renew_maxsz)
547 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
548                                 encode_setclientid_maxsz)
549 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
550                                 decode_setclientid_maxsz)
551 #define NFS4_enc_setclientid_confirm_sz \
552                                 (compound_encode_hdr_maxsz + \
553                                 encode_setclientid_confirm_maxsz)
554 #define NFS4_dec_setclientid_confirm_sz \
555                                 (compound_decode_hdr_maxsz + \
556                                 decode_setclientid_confirm_maxsz)
557 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
558                                 encode_sequence_maxsz + \
559                                 encode_putfh_maxsz + \
560                                 encode_lock_maxsz)
561 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
562                                 decode_sequence_maxsz + \
563                                 decode_putfh_maxsz + \
564                                 decode_lock_maxsz)
565 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
566                                 encode_sequence_maxsz + \
567                                 encode_putfh_maxsz + \
568                                 encode_lockt_maxsz)
569 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
570                                  decode_sequence_maxsz + \
571                                  decode_putfh_maxsz + \
572                                  decode_lockt_maxsz)
573 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
574                                 encode_sequence_maxsz + \
575                                 encode_putfh_maxsz + \
576                                 encode_locku_maxsz)
577 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
578                                 decode_sequence_maxsz + \
579                                 decode_putfh_maxsz + \
580                                 decode_locku_maxsz)
581 #define NFS4_enc_release_lockowner_sz \
582                                 (compound_encode_hdr_maxsz + \
583                                  encode_lockowner_maxsz)
584 #define NFS4_dec_release_lockowner_sz \
585                                 (compound_decode_hdr_maxsz + \
586                                  decode_lockowner_maxsz)
587 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
588                                 encode_sequence_maxsz + \
589                                 encode_putfh_maxsz + \
590                                 encode_access_maxsz + \
591                                 encode_getattr_maxsz)
592 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
593                                 decode_sequence_maxsz + \
594                                 decode_putfh_maxsz + \
595                                 decode_access_maxsz + \
596                                 decode_getattr_maxsz)
597 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
598                                 encode_sequence_maxsz + \
599                                 encode_putfh_maxsz + \
600                                 encode_getattr_maxsz + \
601                                 encode_renew_maxsz)
602 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
603                                 decode_sequence_maxsz + \
604                                 decode_putfh_maxsz + \
605                                 decode_getattr_maxsz + \
606                                 decode_renew_maxsz)
607 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
608                                 encode_sequence_maxsz + \
609                                 encode_putfh_maxsz + \
610                                 encode_lookup_maxsz + \
611                                 encode_getattr_maxsz + \
612                                 encode_getfh_maxsz)
613 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
614                                 decode_sequence_maxsz + \
615                                 decode_putfh_maxsz + \
616                                 decode_lookup_maxsz + \
617                                 decode_getattr_maxsz + \
618                                 decode_getfh_maxsz)
619 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
620                                 encode_sequence_maxsz + \
621                                 encode_putrootfh_maxsz + \
622                                 encode_getattr_maxsz + \
623                                 encode_getfh_maxsz)
624 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
625                                 decode_sequence_maxsz + \
626                                 decode_putrootfh_maxsz + \
627                                 decode_getattr_maxsz + \
628                                 decode_getfh_maxsz)
629 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
630                                 encode_sequence_maxsz + \
631                                 encode_putfh_maxsz + \
632                                 encode_remove_maxsz)
633 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
634                                 decode_sequence_maxsz + \
635                                 decode_putfh_maxsz + \
636                                 decode_remove_maxsz)
637 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
638                                 encode_sequence_maxsz + \
639                                 encode_putfh_maxsz + \
640                                 encode_savefh_maxsz + \
641                                 encode_putfh_maxsz + \
642                                 encode_rename_maxsz)
643 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
644                                 decode_sequence_maxsz + \
645                                 decode_putfh_maxsz + \
646                                 decode_savefh_maxsz + \
647                                 decode_putfh_maxsz + \
648                                 decode_rename_maxsz)
649 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
650                                 encode_sequence_maxsz + \
651                                 encode_putfh_maxsz + \
652                                 encode_savefh_maxsz + \
653                                 encode_putfh_maxsz + \
654                                 encode_link_maxsz + \
655                                 encode_restorefh_maxsz + \
656                                 encode_getattr_maxsz)
657 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
658                                 decode_sequence_maxsz + \
659                                 decode_putfh_maxsz + \
660                                 decode_savefh_maxsz + \
661                                 decode_putfh_maxsz + \
662                                 decode_link_maxsz + \
663                                 decode_restorefh_maxsz + \
664                                 decode_getattr_maxsz)
665 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
666                                 encode_sequence_maxsz + \
667                                 encode_putfh_maxsz + \
668                                 encode_symlink_maxsz + \
669                                 encode_getattr_maxsz + \
670                                 encode_getfh_maxsz)
671 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
672                                 decode_sequence_maxsz + \
673                                 decode_putfh_maxsz + \
674                                 decode_symlink_maxsz + \
675                                 decode_getattr_maxsz + \
676                                 decode_getfh_maxsz)
677 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
678                                 encode_sequence_maxsz + \
679                                 encode_putfh_maxsz + \
680                                 encode_create_maxsz + \
681                                 encode_getfh_maxsz + \
682                                 encode_getattr_maxsz)
683 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
684                                 decode_sequence_maxsz + \
685                                 decode_putfh_maxsz + \
686                                 decode_create_maxsz + \
687                                 decode_getfh_maxsz + \
688                                 decode_getattr_maxsz)
689 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
690                                 encode_sequence_maxsz + \
691                                 encode_putfh_maxsz + \
692                                 encode_getattr_maxsz)
693 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
694                                 decode_sequence_maxsz + \
695                                 decode_putfh_maxsz + \
696                                 decode_getattr_maxsz)
697 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
698                                 encode_sequence_maxsz + \
699                                 encode_putfh_maxsz + \
700                                 encode_statfs_maxsz)
701 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
702                                 decode_sequence_maxsz + \
703                                 decode_putfh_maxsz + \
704                                 decode_statfs_maxsz)
705 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
706                                 encode_sequence_maxsz + \
707                                 encode_putfh_maxsz + \
708                                 encode_getattr_maxsz)
709 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
710                                 decode_sequence_maxsz + \
711                                 decode_putfh_maxsz + \
712                                 decode_getattr_maxsz)
713 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
714                                 encode_sequence_maxsz + \
715                                 encode_putfh_maxsz + \
716                                 encode_layoutreturn_maxsz + \
717                                 encode_delegreturn_maxsz + \
718                                 encode_getattr_maxsz)
719 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
720                                 decode_sequence_maxsz + \
721                                 decode_putfh_maxsz + \
722                                 decode_layoutreturn_maxsz + \
723                                 decode_delegreturn_maxsz + \
724                                 decode_getattr_maxsz)
725 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
726                                 encode_sequence_maxsz + \
727                                 encode_putfh_maxsz + \
728                                 encode_getacl_maxsz)
729 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
730                                 decode_sequence_maxsz + \
731                                 decode_putfh_maxsz + \
732                                 decode_getacl_maxsz)
733 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
734                                 encode_sequence_maxsz + \
735                                 encode_putfh_maxsz + \
736                                 encode_setacl_maxsz)
737 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
738                                 decode_sequence_maxsz + \
739                                 decode_putfh_maxsz + \
740                                 decode_setacl_maxsz)
741 #define NFS4_enc_fs_locations_sz \
742                                 (compound_encode_hdr_maxsz + \
743                                  encode_sequence_maxsz + \
744                                  encode_putfh_maxsz + \
745                                  encode_lookup_maxsz + \
746                                  encode_fs_locations_maxsz + \
747                                  encode_renew_maxsz)
748 #define NFS4_dec_fs_locations_sz \
749                                 (compound_decode_hdr_maxsz + \
750                                  decode_sequence_maxsz + \
751                                  decode_putfh_maxsz + \
752                                  decode_lookup_maxsz + \
753                                  decode_fs_locations_maxsz + \
754                                  decode_renew_maxsz)
755 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
756                                 encode_sequence_maxsz + \
757                                 encode_putfh_maxsz + \
758                                 encode_secinfo_maxsz)
759 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
760                                 decode_sequence_maxsz + \
761                                 decode_putfh_maxsz + \
762                                 decode_secinfo_maxsz)
763 #define NFS4_enc_fsid_present_sz \
764                                 (compound_encode_hdr_maxsz + \
765                                  encode_sequence_maxsz + \
766                                  encode_putfh_maxsz + \
767                                  encode_getfh_maxsz + \
768                                  encode_renew_maxsz)
769 #define NFS4_dec_fsid_present_sz \
770                                 (compound_decode_hdr_maxsz + \
771                                  decode_sequence_maxsz + \
772                                  decode_putfh_maxsz + \
773                                  decode_getfh_maxsz + \
774                                  decode_renew_maxsz)
775 #if defined(CONFIG_NFS_V4_1)
776 #define NFS4_enc_bind_conn_to_session_sz \
777                                 (compound_encode_hdr_maxsz + \
778                                  encode_bind_conn_to_session_maxsz)
779 #define NFS4_dec_bind_conn_to_session_sz \
780                                 (compound_decode_hdr_maxsz + \
781                                  decode_bind_conn_to_session_maxsz)
782 #define NFS4_enc_exchange_id_sz \
783                                 (compound_encode_hdr_maxsz + \
784                                  encode_exchange_id_maxsz)
785 #define NFS4_dec_exchange_id_sz \
786                                 (compound_decode_hdr_maxsz + \
787                                  decode_exchange_id_maxsz)
788 #define NFS4_enc_create_session_sz \
789                                 (compound_encode_hdr_maxsz + \
790                                  encode_create_session_maxsz)
791 #define NFS4_dec_create_session_sz \
792                                 (compound_decode_hdr_maxsz + \
793                                  decode_create_session_maxsz)
794 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
795                                          encode_destroy_session_maxsz)
796 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
797                                          decode_destroy_session_maxsz)
798 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
799                                          encode_destroy_clientid_maxsz)
800 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
801                                          decode_destroy_clientid_maxsz)
802 #define NFS4_enc_sequence_sz \
803                                 (compound_decode_hdr_maxsz + \
804                                  encode_sequence_maxsz)
805 #define NFS4_dec_sequence_sz \
806                                 (compound_decode_hdr_maxsz + \
807                                  decode_sequence_maxsz)
808 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
809                                          encode_sequence_maxsz + \
810                                          encode_putrootfh_maxsz + \
811                                          encode_fsinfo_maxsz)
812 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
813                                          decode_sequence_maxsz + \
814                                          decode_putrootfh_maxsz + \
815                                          decode_fsinfo_maxsz)
816 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
817                                          encode_sequence_maxsz + \
818                                          encode_reclaim_complete_maxsz)
819 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
820                                          decode_sequence_maxsz + \
821                                          decode_reclaim_complete_maxsz)
822 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
823                                 encode_sequence_maxsz +\
824                                 encode_getdeviceinfo_maxsz)
825 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
826                                 decode_sequence_maxsz + \
827                                 decode_getdeviceinfo_maxsz)
828 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
829                                 encode_sequence_maxsz + \
830                                 encode_putfh_maxsz +        \
831                                 encode_layoutget_maxsz)
832 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
833                                 decode_sequence_maxsz + \
834                                 decode_putfh_maxsz +        \
835                                 decode_layoutget_maxsz)
836 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
837                                 encode_sequence_maxsz +\
838                                 encode_putfh_maxsz + \
839                                 encode_layoutcommit_maxsz + \
840                                 encode_getattr_maxsz)
841 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
842                                 decode_sequence_maxsz + \
843                                 decode_putfh_maxsz + \
844                                 decode_layoutcommit_maxsz + \
845                                 decode_getattr_maxsz)
846 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
847                                 encode_sequence_maxsz + \
848                                 encode_putfh_maxsz + \
849                                 encode_layoutreturn_maxsz)
850 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
851                                 decode_sequence_maxsz + \
852                                 decode_putfh_maxsz + \
853                                 decode_layoutreturn_maxsz)
854 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
855                                         encode_sequence_maxsz + \
856                                         encode_putrootfh_maxsz +\
857                                         encode_secinfo_no_name_maxsz)
858 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
859                                         decode_sequence_maxsz + \
860                                         decode_putrootfh_maxsz + \
861                                         decode_secinfo_no_name_maxsz)
862 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
863                                          encode_sequence_maxsz + \
864                                          encode_test_stateid_maxsz)
865 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
866                                          decode_sequence_maxsz + \
867                                          decode_test_stateid_maxsz)
868 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
869                                          encode_sequence_maxsz + \
870                                          encode_free_stateid_maxsz)
871 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
872                                          decode_sequence_maxsz + \
873                                          decode_free_stateid_maxsz)
874 
875 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
876                                       compound_encode_hdr_maxsz +
877                                       encode_sequence_maxsz +
878                                       encode_putfh_maxsz +
879                                       encode_getattr_maxsz) *
880                                      XDR_UNIT);
881 
882 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
883                                      compound_decode_hdr_maxsz +
884                                      decode_sequence_maxsz +
885                                      decode_putfh_maxsz) *
886                                     XDR_UNIT);
887 
888 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
889                                            compound_decode_hdr_maxsz +
890                                            decode_sequence_maxsz) *
891                                           XDR_UNIT);
892 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
893 #endif /* CONFIG_NFS_V4_1 */
894 
895 static const umode_t nfs_type2fmt[] = {
896         [NF4BAD] = 0,
897         [NF4REG] = S_IFREG,
898         [NF4DIR] = S_IFDIR,
899         [NF4BLK] = S_IFBLK,
900         [NF4CHR] = S_IFCHR,
901         [NF4LNK] = S_IFLNK,
902         [NF4SOCK] = S_IFSOCK,
903         [NF4FIFO] = S_IFIFO,
904         [NF4ATTRDIR] = 0,
905         [NF4NAMEDATTR] = 0,
906 };
907 
908 struct compound_hdr {
909         int32_t         status;
910         uint32_t        nops;
911         __be32 *        nops_p;
912         uint32_t        taglen;
913         char *          tag;
914         uint32_t        replen;         /* expected reply words */
915         u32             minorversion;
916 };
917 
918 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
919 {
920         __be32 *p = xdr_reserve_space(xdr, nbytes);
921         BUG_ON(!p);
922         return p;
923 }
924 
925 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
926 {
927         __be32 *p;
928 
929         p = xdr_reserve_space(xdr, len);
930         xdr_encode_opaque_fixed(p, buf, len);
931 }
932 
933 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
934 {
935         __be32 *p;
936 
937         p = reserve_space(xdr, 4 + len);
938         xdr_encode_opaque(p, str, len);
939 }
940 
941 static void encode_uint32(struct xdr_stream *xdr, u32 n)
942 {
943         __be32 *p;
944 
945         p = reserve_space(xdr, 4);
946         *p = cpu_to_be32(n);
947 }
948 
949 static void encode_uint64(struct xdr_stream *xdr, u64 n)
950 {
951         __be32 *p;
952 
953         p = reserve_space(xdr, 8);
954         xdr_encode_hyper(p, n);
955 }
956 
957 static void encode_nfs4_seqid(struct xdr_stream *xdr,
958                 const struct nfs_seqid *seqid)
959 {
960         if (seqid != NULL)
961                 encode_uint32(xdr, seqid->sequence->counter);
962         else
963                 encode_uint32(xdr, 0);
964 }
965 
966 static void encode_compound_hdr(struct xdr_stream *xdr,
967                                 struct rpc_rqst *req,
968                                 struct compound_hdr *hdr)
969 {
970         __be32 *p;
971         struct rpc_auth *auth = req->rq_cred->cr_auth;
972 
973         /* initialize running count of expected bytes in reply.
974          * NOTE: the replied tag SHOULD be the same is the one sent,
975          * but this is not required as a MUST for the server to do so. */
976         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
977 
978         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
979         encode_string(xdr, hdr->taglen, hdr->tag);
980         p = reserve_space(xdr, 8);
981         *p++ = cpu_to_be32(hdr->minorversion);
982         hdr->nops_p = p;
983         *p = cpu_to_be32(hdr->nops);
984 }
985 
986 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
987                 uint32_t replen,
988                 struct compound_hdr *hdr)
989 {
990         encode_uint32(xdr, op);
991         hdr->nops++;
992         hdr->replen += replen;
993 }
994 
995 static void encode_nops(struct compound_hdr *hdr)
996 {
997         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
998         *hdr->nops_p = htonl(hdr->nops);
999 }
1000 
1001 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002 {
1003         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004 }
1005 
1006 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007 {
1008         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009 }
1010 
1011 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012                                 const struct nfs4_label *label,
1013                                 const struct nfs_server *server,
1014                                 bool excl_check, const umode_t *umask)
1015 {
1016         char owner_name[IDMAP_NAMESZ];
1017         char owner_group[IDMAP_NAMESZ];
1018         int owner_namelen = 0;
1019         int owner_grouplen = 0;
1020         __be32 *p;
1021         unsigned i;
1022         uint32_t len = 0;
1023         uint32_t bmval_len;
1024         uint32_t bmval[3] = { 0 };
1025 
1026         /*
1027          * We reserve enough space to write the entire attribute buffer at once.
1028          */
1029         if (iap->ia_valid & ATTR_SIZE) {
1030                 bmval[0] |= FATTR4_WORD0_SIZE;
1031                 len += 8;
1032         }
1033         if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034                 umask = NULL;
1035         if (iap->ia_valid & ATTR_MODE) {
1036                 if (umask) {
1037                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038                         len += 8;
1039                 } else {
1040                         bmval[1] |= FATTR4_WORD1_MODE;
1041                         len += 4;
1042                 }
1043         }
1044         if (iap->ia_valid & ATTR_UID) {
1045                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046                 if (owner_namelen < 0) {
1047                         dprintk("nfs: couldn't resolve uid %d to string\n",
1048                                         from_kuid(&init_user_ns, iap->ia_uid));
1049                         /* XXX */
1050                         strcpy(owner_name, "nobody");
1051                         owner_namelen = sizeof("nobody") - 1;
1052                         /* goto out; */
1053                 }
1054                 bmval[1] |= FATTR4_WORD1_OWNER;
1055                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056         }
1057         if (iap->ia_valid & ATTR_GID) {
1058                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059                 if (owner_grouplen < 0) {
1060                         dprintk("nfs: couldn't resolve gid %d to string\n",
1061                                         from_kgid(&init_user_ns, iap->ia_gid));
1062                         strcpy(owner_group, "nobody");
1063                         owner_grouplen = sizeof("nobody") - 1;
1064                         /* goto out; */
1065                 }
1066                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068         }
1069         if (iap->ia_valid & ATTR_ATIME_SET) {
1070                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071                 len += 16;
1072         } else if (iap->ia_valid & ATTR_ATIME) {
1073                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074                 len += 4;
1075         }
1076         if (iap->ia_valid & ATTR_MTIME_SET) {
1077                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                 len += 16;
1079         } else if (iap->ia_valid & ATTR_MTIME) {
1080                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081                 len += 4;
1082         }
1083 
1084         if (excl_check) {
1085                 const u32 *excl_bmval = server->exclcreat_bitmask;
1086                 bmval[0] &= excl_bmval[0];
1087                 bmval[1] &= excl_bmval[1];
1088                 bmval[2] &= excl_bmval[2];
1089 
1090                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091                         label = NULL;
1092         }
1093 
1094         if (label) {
1095                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097         }
1098 
1099         if (bmval[2] != 0)
1100                 bmval_len = 3;
1101         else if (bmval[1] != 0)
1102                 bmval_len = 2;
1103         else
1104                 bmval_len = 1;
1105 
1106         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107 
1108         *p++ = cpu_to_be32(bmval_len);
1109         for (i = 0; i < bmval_len; i++)
1110                 *p++ = cpu_to_be32(bmval[i]);
1111         *p++ = cpu_to_be32(len);
1112 
1113         if (bmval[0] & FATTR4_WORD0_SIZE)
1114                 p = xdr_encode_hyper(p, iap->ia_size);
1115         if (bmval[1] & FATTR4_WORD1_MODE)
1116                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117         if (bmval[1] & FATTR4_WORD1_OWNER)
1118                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122                 if (iap->ia_valid & ATTR_ATIME_SET) {
1123                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126                 } else
1127                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128         }
1129         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130                 if (iap->ia_valid & ATTR_MTIME_SET) {
1131                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134                 } else
1135                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136         }
1137         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138                 *p++ = cpu_to_be32(label->lfs);
1139                 *p++ = cpu_to_be32(label->pi);
1140                 *p++ = cpu_to_be32(label->len);
1141                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142         }
1143         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145                 *p++ = cpu_to_be32(*umask);
1146         }
1147 
1148 /* out: */
1149 }
1150 
1151 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152 {
1153         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154         encode_uint32(xdr, access);
1155 }
1156 
1157 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158 {
1159         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160         encode_nfs4_seqid(xdr, arg->seqid);
1161         encode_nfs4_stateid(xdr, &arg->stateid);
1162 }
1163 
1164 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165 {
1166         __be32 *p;
1167 
1168         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169         p = reserve_space(xdr, 12);
1170         p = xdr_encode_hyper(p, args->offset);
1171         *p = cpu_to_be32(args->count);
1172 }
1173 
1174 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175 {
1176         __be32 *p;
1177 
1178         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179         encode_uint32(xdr, create->ftype);
1180 
1181         switch (create->ftype) {
1182         case NF4LNK:
1183                 p = reserve_space(xdr, 4);
1184                 *p = cpu_to_be32(create->u.symlink.len);
1185                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186                                 create->u.symlink.len);
1187                 xdr->buf->flags |= XDRBUF_WRITE;
1188                 break;
1189 
1190         case NF4BLK: case NF4CHR:
1191                 p = reserve_space(xdr, 8);
1192                 *p++ = cpu_to_be32(create->u.device.specdata1);
1193                 *p = cpu_to_be32(create->u.device.specdata2);
1194                 break;
1195 
1196         default:
1197                 break;
1198         }
1199 
1200         encode_string(xdr, create->name->len, create->name->name);
1201         encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202                      &create->umask);
1203 }
1204 
1205 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206 {
1207         __be32 *p;
1208 
1209         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210         p = reserve_space(xdr, 8);
1211         *p++ = cpu_to_be32(1);
1212         *p = cpu_to_be32(bitmap);
1213 }
1214 
1215 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216 {
1217         __be32 *p;
1218 
1219         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220         p = reserve_space(xdr, 12);
1221         *p++ = cpu_to_be32(2);
1222         *p++ = cpu_to_be32(bm0);
1223         *p = cpu_to_be32(bm1);
1224 }
1225 
1226 static void
1227 encode_getattr_three(struct xdr_stream *xdr,
1228                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229                      struct compound_hdr *hdr)
1230 {
1231         __be32 *p;
1232 
1233         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234         if (bm2) {
1235                 p = reserve_space(xdr, 16);
1236                 *p++ = cpu_to_be32(3);
1237                 *p++ = cpu_to_be32(bm0);
1238                 *p++ = cpu_to_be32(bm1);
1239                 *p = cpu_to_be32(bm2);
1240         } else if (bm1) {
1241                 p = reserve_space(xdr, 12);
1242                 *p++ = cpu_to_be32(2);
1243                 *p++ = cpu_to_be32(bm0);
1244                 *p = cpu_to_be32(bm1);
1245         } else {
1246                 p = reserve_space(xdr, 8);
1247                 *p++ = cpu_to_be32(1);
1248                 *p = cpu_to_be32(bm0);
1249         }
1250 }
1251 
1252 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253 {
1254         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255                            bitmask[1] & nfs4_fattr_bitmap[1],
1256                            bitmask[2] & nfs4_fattr_bitmap[2],
1257                            hdr);
1258 }
1259 
1260 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261                                  const u32 *open_bitmap,
1262                                  struct compound_hdr *hdr)
1263 {
1264         encode_getattr_three(xdr,
1265                              bitmask[0] & open_bitmap[0],
1266                              bitmask[1] & open_bitmap[1],
1267                              bitmask[2] & open_bitmap[2],
1268                              hdr);
1269 }
1270 
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273         encode_getattr_three(xdr,
1274                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1275                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1276                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1277                              hdr);
1278 }
1279 
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284 }
1285 
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290 
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294         encode_string(xdr, name->len, name->name);
1295 }
1296 
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299         if (fl->fl_type == F_RDLCK)
1300                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303 
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306         if (fl->fl_end == OFFSET_MAX)
1307                 return ~(uint64_t)0;
1308         return fl->fl_end - fl->fl_start + 1;
1309 }
1310 
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313         __be32 *p;
1314 
1315         p = reserve_space(xdr, 32);
1316         p = xdr_encode_hyper(p, lowner->clientid);
1317         *p++ = cpu_to_be32(20);
1318         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319         *p++ = cpu_to_be32(lowner->s_dev);
1320         xdr_encode_hyper(p, lowner->id);
1321 }
1322 
1323 /*
1324  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326  */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329         __be32 *p;
1330 
1331         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332         p = reserve_space(xdr, 28);
1333         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334         *p++ = cpu_to_be32(args->reclaim);
1335         p = xdr_encode_hyper(p, args->fl->fl_start);
1336         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337         *p = cpu_to_be32(args->new_lock_owner);
1338         if (args->new_lock_owner){
1339                 encode_nfs4_seqid(xdr, args->open_seqid);
1340                 encode_nfs4_stateid(xdr, &args->open_stateid);
1341                 encode_nfs4_seqid(xdr, args->lock_seqid);
1342                 encode_lockowner(xdr, &args->lock_owner);
1343         }
1344         else {
1345                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346                 encode_nfs4_seqid(xdr, args->lock_seqid);
1347         }
1348 }
1349 
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352         __be32 *p;
1353 
1354         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355         p = reserve_space(xdr, 20);
1356         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357         p = xdr_encode_hyper(p, args->fl->fl_start);
1358         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359         encode_lockowner(xdr, &args->lock_owner);
1360 }
1361 
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365 
1366         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368         encode_nfs4_seqid(xdr, args->seqid);
1369         encode_nfs4_stateid(xdr, &args->stateid);
1370         p = reserve_space(xdr, 16);
1371         p = xdr_encode_hyper(p, args->fl->fl_start);
1372         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374 
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378         encode_lockowner(xdr, lowner);
1379 }
1380 
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384         encode_string(xdr, name->len, name->name);
1385 }
1386 
1387 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388 {
1389         __be32 *p;
1390 
1391         p = reserve_space(xdr, 8);
1392         *p++ = cpu_to_be32(share_access);
1393         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1394 }
1395 
1396 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398         __be32 *p;
1399  /*
1400  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401  * owner 4 = 32
1402  */
1403         encode_nfs4_seqid(xdr, arg->seqid);
1404         encode_share_access(xdr, arg->share_access);
1405         p = reserve_space(xdr, 36);
1406         p = xdr_encode_hyper(p, arg->clientid);
1407         *p++ = cpu_to_be32(24);
1408         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409         *p++ = cpu_to_be32(arg->server->s_dev);
1410         *p++ = cpu_to_be32(arg->id.uniquifier);
1411         xdr_encode_hyper(p, arg->id.create_time);
1412 }
1413 
1414 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415 {
1416         __be32 *p;
1417 
1418         p = reserve_space(xdr, 4);
1419         switch(arg->createmode) {
1420         case NFS4_CREATE_UNCHECKED:
1421                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423                              &arg->umask);
1424                 break;
1425         case NFS4_CREATE_GUARDED:
1426                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428                              &arg->umask);
1429                 break;
1430         case NFS4_CREATE_EXCLUSIVE:
1431                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1433                 break;
1434         case NFS4_CREATE_EXCLUSIVE4_1:
1435                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438                              &arg->umask);
1439         }
1440 }
1441 
1442 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443 {
1444         __be32 *p;
1445 
1446         p = reserve_space(xdr, 4);
1447         switch (arg->open_flags & O_CREAT) {
1448         case 0:
1449                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450                 break;
1451         default:
1452                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453                 encode_createmode(xdr, arg);
1454         }
1455 }
1456 
1457 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458 {
1459         __be32 *p;
1460 
1461         p = reserve_space(xdr, 4);
1462         switch (delegation_type) {
1463         case 0:
1464                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465                 break;
1466         case FMODE_READ:
1467                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468                 break;
1469         case FMODE_WRITE|FMODE_READ:
1470                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471                 break;
1472         default:
1473                 BUG();
1474         }
1475 }
1476 
1477 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478 {
1479         __be32 *p;
1480 
1481         p = reserve_space(xdr, 4);
1482         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483         encode_string(xdr, name->len, name->name);
1484 }
1485 
1486 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487 {
1488         __be32 *p;
1489 
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492         encode_delegation_type(xdr, type);
1493 }
1494 
1495 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496 {
1497         __be32 *p;
1498 
1499         p = reserve_space(xdr, 4);
1500         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501         encode_nfs4_stateid(xdr, stateid);
1502         encode_string(xdr, name->len, name->name);
1503 }
1504 
1505 static inline void encode_claim_fh(struct xdr_stream *xdr)
1506 {
1507         __be32 *p;
1508 
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511 }
1512 
1513 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514 {
1515         __be32 *p;
1516 
1517         p = reserve_space(xdr, 4);
1518         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519         encode_nfs4_stateid(xdr, stateid);
1520 }
1521 
1522 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523 {
1524         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525         encode_openhdr(xdr, arg);
1526         encode_opentype(xdr, arg);
1527         switch (arg->claim) {
1528         case NFS4_OPEN_CLAIM_NULL:
1529                 encode_claim_null(xdr, arg->name);
1530                 break;
1531         case NFS4_OPEN_CLAIM_PREVIOUS:
1532                 encode_claim_previous(xdr, arg->u.delegation_type);
1533                 break;
1534         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536                 break;
1537         case NFS4_OPEN_CLAIM_FH:
1538                 encode_claim_fh(xdr);
1539                 break;
1540         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542                 break;
1543         default:
1544                 BUG();
1545         }
1546 }
1547 
1548 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551         encode_nfs4_stateid(xdr, arg->stateid);
1552         encode_nfs4_seqid(xdr, arg->seqid);
1553 }
1554 
1555 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556 {
1557         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558         encode_nfs4_stateid(xdr, &arg->stateid);
1559         encode_nfs4_seqid(xdr, arg->seqid);
1560         encode_share_access(xdr, arg->share_access);
1561 }
1562 
1563 static void
1564 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565 {
1566         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567         encode_string(xdr, fh->size, fh->data);
1568 }
1569 
1570 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571 {
1572         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573 }
1574 
1575 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576                         struct compound_hdr *hdr)
1577 {
1578         __be32 *p;
1579 
1580         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581         encode_nfs4_stateid(xdr, &args->stateid);
1582 
1583         p = reserve_space(xdr, 12);
1584         p = xdr_encode_hyper(p, args->offset);
1585         *p = cpu_to_be32(args->count);
1586 }
1587 
1588 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589 {
1590         uint32_t attrs[3] = {
1591                 FATTR4_WORD0_RDATTR_ERROR,
1592                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1593         };
1594         uint32_t dircount = readdir->count >> 1;
1595         __be32 *p, verf[2];
1596         uint32_t attrlen = 0;
1597         unsigned int i;
1598 
1599         if (readdir->plus) {
1600                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607                 dircount >>= 1;
1608         }
1609         /* Use mounted_on_fileid only if the server supports it */
1610         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611                 attrs[0] |= FATTR4_WORD0_FILEID;
1612         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613                 attrs[i] &= readdir->bitmask[i];
1614                 if (attrs[i] != 0)
1615                         attrlen = i+1;
1616         }
1617 
1618         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619         encode_uint64(xdr, readdir->cookie);
1620         encode_nfs4_verifier(xdr, &readdir->verifier);
1621         p = reserve_space(xdr, 12 + (attrlen << 2));
1622         *p++ = cpu_to_be32(dircount);
1623         *p++ = cpu_to_be32(readdir->count);
1624         *p++ = cpu_to_be32(attrlen);
1625         for (i = 0; i < attrlen; i++)
1626                 *p++ = cpu_to_be32(attrs[i]);
1627         memcpy(verf, readdir->verifier.data, sizeof(verf));
1628 
1629         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630                         __func__,
1631                         (unsigned long long)readdir->cookie,
1632                         verf[0], verf[1],
1633                         attrs[0] & readdir->bitmask[0],
1634                         attrs[1] & readdir->bitmask[1],
1635                         attrs[2] & readdir->bitmask[2]);
1636 }
1637 
1638 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639 {
1640         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641 }
1642 
1643 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644 {
1645         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646         encode_string(xdr, name->len, name->name);
1647 }
1648 
1649 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650 {
1651         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652         encode_string(xdr, oldname->len, oldname->name);
1653         encode_string(xdr, newname->len, newname->name);
1654 }
1655 
1656 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657                          struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660         encode_uint64(xdr, clid);
1661 }
1662 
1663 static void
1664 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665 {
1666         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667 }
1668 
1669 static void
1670 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671 {
1672         __be32 *p;
1673 
1674         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675         encode_nfs4_stateid(xdr, &zero_stateid);
1676         p = reserve_space(xdr, 2*4);
1677         *p++ = cpu_to_be32(1);
1678         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679         p = reserve_space(xdr, 4);
1680         *p = cpu_to_be32(arg->acl_len);
1681         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682 }
1683 
1684 static void
1685 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686 {
1687         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688 }
1689 
1690 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693         encode_nfs4_stateid(xdr, &arg->stateid);
1694         encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695 }
1696 
1697 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698 {
1699         __be32 *p;
1700 
1701         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703 
1704         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705                         setclientid->sc_clnt->cl_owner_id);
1706         p = reserve_space(xdr, 4);
1707         *p = cpu_to_be32(setclientid->sc_prog);
1708         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710         p = reserve_space(xdr, 4);
1711         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712 }
1713 
1714 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715 {
1716         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717                         decode_setclientid_confirm_maxsz, hdr);
1718         encode_uint64(xdr, arg->clientid);
1719         encode_nfs4_verifier(xdr, &arg->confirm);
1720 }
1721 
1722 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723                          struct compound_hdr *hdr)
1724 {
1725         __be32 *p;
1726 
1727         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728         encode_nfs4_stateid(xdr, &args->stateid);
1729 
1730         p = reserve_space(xdr, 16);
1731         p = xdr_encode_hyper(p, args->offset);
1732         *p++ = cpu_to_be32(args->stable);
1733         *p = cpu_to_be32(args->count);
1734 
1735         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736 }
1737 
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741         encode_nfs4_stateid(xdr, stateid);
1742 }
1743 
1744 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745 {
1746         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747         encode_string(xdr, name->len, name->name);
1748 }
1749 
1750 #if defined(CONFIG_NFS_V4_1)
1751 /* NFSv4.1 operations */
1752 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753                                    struct nfs41_bind_conn_to_session_args *args,
1754                                    struct compound_hdr *hdr)
1755 {
1756         __be32 *p;
1757 
1758         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759                 decode_bind_conn_to_session_maxsz, hdr);
1760         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761         p = xdr_reserve_space(xdr, 8);
1762         *p++ = cpu_to_be32(args->dir);
1763         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764 }
1765 
1766 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767 {
1768         unsigned int i;
1769         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771                 encode_uint32(xdr, op_map->u.words[i]);
1772 }
1773 
1774 static void encode_exchange_id(struct xdr_stream *xdr,
1775                                struct nfs41_exchange_id_args *args,
1776                                struct compound_hdr *hdr)
1777 {
1778         __be32 *p;
1779         char impl_name[IMPL_NAME_LIMIT];
1780         int len = 0;
1781 
1782         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783         encode_nfs4_verifier(xdr, args->verifier);
1784 
1785         encode_string(xdr, strlen(args->client->cl_owner_id),
1786                         args->client->cl_owner_id);
1787 
1788         encode_uint32(xdr, args->flags);
1789         encode_uint32(xdr, args->state_protect.how);
1790 
1791         switch (args->state_protect.how) {
1792         case SP4_NONE:
1793                 break;
1794         case SP4_MACH_CRED:
1795                 encode_op_map(xdr, &args->state_protect.enforce);
1796                 encode_op_map(xdr, &args->state_protect.allow);
1797                 break;
1798         default:
1799                 WARN_ON_ONCE(1);
1800                 break;
1801         }
1802 
1803         if (send_implementation_id &&
1804             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806                 <= sizeof(impl_name) + 1)
1807                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808                                utsname()->sysname, utsname()->release,
1809                                utsname()->version, utsname()->machine);
1810 
1811         if (len > 0) {
1812                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1813 
1814                 encode_string(xdr,
1815                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817                 encode_string(xdr, len, impl_name);
1818                 /* just send zeros for nii_date - the date is in nii_name */
1819                 p = reserve_space(xdr, 12);
1820                 p = xdr_encode_hyper(p, 0);
1821                 *p = cpu_to_be32(0);
1822         } else
1823                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1824 }
1825 
1826 static void encode_create_session(struct xdr_stream *xdr,
1827                                   struct nfs41_create_session_args *args,
1828                                   struct compound_hdr *hdr)
1829 {
1830         __be32 *p;
1831         struct nfs_client *clp = args->client;
1832         struct rpc_clnt *clnt = clp->cl_rpcclient;
1833         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834         u32 max_resp_sz_cached;
1835 
1836         /*
1837          * Assumes OPEN is the biggest non-idempotent compound.
1838          * 2 is the verifier.
1839          */
1840         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1841                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1842 
1843         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845         p = xdr_encode_hyper(p, args->clientid);
1846         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1847         *p++ = cpu_to_be32(args->flags);                        /*flags */
1848 
1849         /* Fore Channel */
1850         *p++ = cpu_to_be32(0);                          /* header padding size */
1851         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1854         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1855         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1856         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1857 
1858         /* Back Channel */
1859         *p++ = cpu_to_be32(0);                          /* header padding size */
1860         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1863         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1864         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1865         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1866 
1867         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1868         *p++ = cpu_to_be32(1);
1869         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1870 
1871         /* authsys_parms rfc1831 */
1872         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1873         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874         *p++ = cpu_to_be32(0);                          /* UID */
1875         *p++ = cpu_to_be32(0);                          /* GID */
1876         *p = cpu_to_be32(0);                            /* No more gids */
1877 }
1878 
1879 static void encode_destroy_session(struct xdr_stream *xdr,
1880                                    struct nfs4_session *session,
1881                                    struct compound_hdr *hdr)
1882 {
1883         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885 }
1886 
1887 static void encode_destroy_clientid(struct xdr_stream *xdr,
1888                                    uint64_t clientid,
1889                                    struct compound_hdr *hdr)
1890 {
1891         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892         encode_uint64(xdr, clientid);
1893 }
1894 
1895 static void encode_reclaim_complete(struct xdr_stream *xdr,
1896                                     struct nfs41_reclaim_complete_args *args,
1897                                     struct compound_hdr *hdr)
1898 {
1899         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900         encode_uint32(xdr, args->one_fs);
1901 }
1902 #endif /* CONFIG_NFS_V4_1 */
1903 
1904 static void encode_sequence(struct xdr_stream *xdr,
1905                             const struct nfs4_sequence_args *args,
1906                             struct compound_hdr *hdr)
1907 {
1908 #if defined(CONFIG_NFS_V4_1)
1909         struct nfs4_session *session;
1910         struct nfs4_slot_table *tp;
1911         struct nfs4_slot *slot = args->sa_slot;
1912         __be32 *p;
1913 
1914         tp = slot->table;
1915         session = tp->session;
1916         if (!session)
1917                 return;
1918 
1919         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920 
1921         /*
1922          * Sessionid + seqid + slotid + max slotid + cache_this
1923          */
1924         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925                 "max_slotid=%d cache_this=%d\n",
1926                 __func__,
1927                 ((u32 *)session->sess_id.data)[0],
1928                 ((u32 *)session->sess_id.data)[1],
1929                 ((u32 *)session->sess_id.data)[2],
1930                 ((u32 *)session->sess_id.data)[3],
1931                 slot->seq_nr, slot->slot_nr,
1932                 tp->highest_used_slotid, args->sa_cache_this);
1933         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935         *p++ = cpu_to_be32(slot->seq_nr);
1936         *p++ = cpu_to_be32(slot->slot_nr);
1937         *p++ = cpu_to_be32(tp->highest_used_slotid);
1938         *p = cpu_to_be32(args->sa_cache_this);
1939 #endif /* CONFIG_NFS_V4_1 */
1940 }
1941 
1942 #ifdef CONFIG_NFS_V4_1
1943 static void
1944 encode_getdeviceinfo(struct xdr_stream *xdr,
1945                      const struct nfs4_getdeviceinfo_args *args,
1946                      struct compound_hdr *hdr)
1947 {
1948         __be32 *p;
1949 
1950         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953                                     NFS4_DEVICEID4_SIZE);
1954         *p++ = cpu_to_be32(args->pdev->layout_type);
1955         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1956 
1957         p = reserve_space(xdr, 4 + 4);
1958         *p++ = cpu_to_be32(1);                  /* bitmap length */
1959         *p++ = cpu_to_be32(args->notify_types);
1960 }
1961 
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964                       const struct nfs4_layoutget_args *args,
1965                       struct compound_hdr *hdr)
1966 {
1967         __be32 *p;
1968 
1969         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970         p = reserve_space(xdr, 36);
1971         *p++ = cpu_to_be32(0);     /* Signal layout available */
1972         *p++ = cpu_to_be32(args->type);
1973         *p++ = cpu_to_be32(args->range.iomode);
1974         p = xdr_encode_hyper(p, args->range.offset);
1975         p = xdr_encode_hyper(p, args->range.length);
1976         p = xdr_encode_hyper(p, args->minlength);
1977         encode_nfs4_stateid(xdr, &args->stateid);
1978         encode_uint32(xdr, args->maxcount);
1979 
1980         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981                 __func__,
1982                 args->type,
1983                 args->range.iomode,
1984                 (unsigned long)args->range.offset,
1985                 (unsigned long)args->range.length,
1986                 args->maxcount);
1987 }
1988 
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991                     struct inode *inode,
1992                     struct nfs4_layoutcommit_args *args,
1993                     struct compound_hdr *hdr)
1994 {
1995         __be32 *p;
1996 
1997         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999 
2000         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001         p = reserve_space(xdr, 20);
2002         /* Only whole file layouts */
2003         p = xdr_encode_hyper(p, 0); /* offset */
2004         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2005         *p = cpu_to_be32(0); /* reclaim */
2006         encode_nfs4_stateid(xdr, &args->stateid);
2007         if (args->lastbytewritten != U64_MAX) {
2008                 p = reserve_space(xdr, 20);
2009                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010                 p = xdr_encode_hyper(p, args->lastbytewritten);
2011         } else {
2012                 p = reserve_space(xdr, 12);
2013                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014         }
2015         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017 
2018         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020                         NFS_I(inode)->layout, xdr, args);
2021         } else {
2022                 encode_uint32(xdr, args->layoutupdate_len);
2023                 if (args->layoutupdate_pages) {
2024                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025                                         args->layoutupdate_len);
2026                 }
2027         }
2028 
2029         return 0;
2030 }
2031 
2032 static void
2033 encode_layoutreturn(struct xdr_stream *xdr,
2034                     const struct nfs4_layoutreturn_args *args,
2035                     struct compound_hdr *hdr)
2036 {
2037         const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038         __be32 *p;
2039 
2040         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041         p = reserve_space(xdr, 16);
2042         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2043         *p++ = cpu_to_be32(args->layout_type);
2044         *p++ = cpu_to_be32(args->range.iomode);
2045         *p = cpu_to_be32(RETURN_FILE);
2046         p = reserve_space(xdr, 16);
2047         p = xdr_encode_hyper(p, args->range.offset);
2048         p = xdr_encode_hyper(p, args->range.length);
2049         spin_lock(&args->inode->i_lock);
2050         encode_nfs4_stateid(xdr, &args->stateid);
2051         spin_unlock(&args->inode->i_lock);
2052         if (args->ld_private->ops && args->ld_private->ops->encode)
2053                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054         else if (lr_ops->encode_layoutreturn)
2055                 lr_ops->encode_layoutreturn(xdr, args);
2056         else
2057                 encode_uint32(xdr, 0);
2058 }
2059 
2060 static int
2061 encode_secinfo_no_name(struct xdr_stream *xdr,
2062                        const struct nfs41_secinfo_no_name_args *args,
2063                        struct compound_hdr *hdr)
2064 {
2065         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066         encode_uint32(xdr, args->style);
2067         return 0;
2068 }
2069 
2070 static void encode_test_stateid(struct xdr_stream *xdr,
2071                                 struct nfs41_test_stateid_args *args,
2072                                 struct compound_hdr *hdr)
2073 {
2074         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075         encode_uint32(xdr, 1);
2076         encode_nfs4_stateid(xdr, args->stateid);
2077 }
2078 
2079 static void encode_free_stateid(struct xdr_stream *xdr,
2080                                 struct nfs41_free_stateid_args *args,
2081                                 struct compound_hdr *hdr)
2082 {
2083         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084         encode_nfs4_stateid(xdr, &args->stateid);
2085 }
2086 #else
2087 static inline void
2088 encode_layoutreturn(struct xdr_stream *xdr,
2089                     const struct nfs4_layoutreturn_args *args,
2090                     struct compound_hdr *hdr)
2091 {
2092 }
2093 #endif /* CONFIG_NFS_V4_1 */
2094 
2095 /*
2096  * END OF "GENERIC" ENCODE ROUTINES.
2097  */
2098 
2099 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100 {
2101 #if defined(CONFIG_NFS_V4_1)
2102         struct nfs4_session *session = args->sa_slot->table->session;
2103         if (session)
2104                 return session->clp->cl_mvops->minor_version;
2105 #endif /* CONFIG_NFS_V4_1 */
2106         return 0;
2107 }
2108 
2109 /*
2110  * Encode an ACCESS request
2111  */
2112 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                 const struct nfs4_accessargs *args)
2114 {
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118 
2119         encode_compound_hdr(xdr, req, &hdr);
2120         encode_sequence(xdr, &args->seq_args, &hdr);
2121         encode_putfh(xdr, args->fh, &hdr);
2122         encode_access(xdr, args->access, &hdr);
2123         encode_getfattr(xdr, args->bitmask, &hdr);
2124         encode_nops(&hdr);
2125 }
2126 
2127 /*
2128  * Encode LOOKUP request
2129  */
2130 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131                                 const struct nfs4_lookup_arg *args)
2132 {
2133         struct compound_hdr hdr = {
2134                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135         };
2136 
2137         encode_compound_hdr(xdr, req, &hdr);
2138         encode_sequence(xdr, &args->seq_args, &hdr);
2139         encode_putfh(xdr, args->dir_fh, &hdr);
2140         encode_lookup(xdr, args->name, &hdr);
2141         encode_getfh(xdr, &hdr);
2142         encode_getfattr(xdr, args->bitmask, &hdr);
2143         encode_nops(&hdr);
2144 }
2145 
2146 /*
2147  * Encode LOOKUP_ROOT request
2148  */
2149 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150                                      struct xdr_stream *xdr,
2151                                      const struct nfs4_lookup_root_arg *args)
2152 {
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156 
2157         encode_compound_hdr(xdr, req, &hdr);
2158         encode_sequence(xdr, &args->seq_args, &hdr);
2159         encode_putrootfh(xdr, &hdr);
2160         encode_getfh(xdr, &hdr);
2161         encode_getfattr(xdr, args->bitmask, &hdr);
2162         encode_nops(&hdr);
2163 }
2164 
2165 /*
2166  * Encode REMOVE request
2167  */
2168 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                 const struct nfs_removeargs *args)
2170 {
2171         struct compound_hdr hdr = {
2172                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173         };
2174 
2175         encode_compound_hdr(xdr, req, &hdr);
2176         encode_sequence(xdr, &args->seq_args, &hdr);
2177         encode_putfh(xdr, args->fh, &hdr);
2178         encode_remove(xdr, &args->name, &hdr);
2179         encode_nops(&hdr);
2180 }
2181 
2182 /*
2183  * Encode RENAME request
2184  */
2185 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                                 const struct nfs_renameargs *args)
2187 {
2188         struct compound_hdr hdr = {
2189                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190         };
2191 
2192         encode_compound_hdr(xdr, req, &hdr);
2193         encode_sequence(xdr, &args->seq_args, &hdr);
2194         encode_putfh(xdr, args->old_dir, &hdr);
2195         encode_savefh(xdr, &hdr);
2196         encode_putfh(xdr, args->new_dir, &hdr);
2197         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198         encode_nops(&hdr);
2199 }
2200 
2201 /*
2202  * Encode LINK request
2203  */
2204 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205                              const struct nfs4_link_arg *args)
2206 {
2207         struct compound_hdr hdr = {
2208                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209         };
2210 
2211         encode_compound_hdr(xdr, req, &hdr);
2212         encode_sequence(xdr, &args->seq_args, &hdr);
2213         encode_putfh(xdr, args->fh, &hdr);
2214         encode_savefh(xdr, &hdr);
2215         encode_putfh(xdr, args->dir_fh, &hdr);
2216         encode_link(xdr, args->name, &hdr);
2217         encode_restorefh(xdr, &hdr);
2218         encode_getfattr(xdr, args->bitmask, &hdr);
2219         encode_nops(&hdr);
2220 }
2221 
2222 /*
2223  * Encode CREATE request
2224  */
2225 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                 const struct nfs4_create_arg *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231 
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_sequence(xdr, &args->seq_args, &hdr);
2234         encode_putfh(xdr, args->dir_fh, &hdr);
2235         encode_create(xdr, args, &hdr);
2236         encode_getfh(xdr, &hdr);
2237         encode_getfattr(xdr, args->bitmask, &hdr);
2238         encode_nops(&hdr);
2239 }
2240 
2241 /*
2242  * Encode SYMLINK request
2243  */
2244 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                                  const struct nfs4_create_arg *args)
2246 {
2247         nfs4_xdr_enc_create(req, xdr, args);
2248 }
2249 
2250 /*
2251  * Encode GETATTR request
2252  */
2253 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254                                  const struct nfs4_getattr_arg *args)
2255 {
2256         struct compound_hdr hdr = {
2257                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258         };
2259 
2260         encode_compound_hdr(xdr, req, &hdr);
2261         encode_sequence(xdr, &args->seq_args, &hdr);
2262         encode_putfh(xdr, args->fh, &hdr);
2263         encode_getfattr(xdr, args->bitmask, &hdr);
2264         encode_nops(&hdr);
2265 }
2266 
2267 /*
2268  * Encode a CLOSE request
2269  */
2270 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271                                struct nfs_closeargs *args)
2272 {
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276 
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         if (args->lr_args)
2281                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2282         if (args->bitmask != NULL)
2283                 encode_getfattr(xdr, args->bitmask, &hdr);
2284         encode_close(xdr, args, &hdr);
2285         encode_nops(&hdr);
2286 }
2287 
2288 /*
2289  * Encode an OPEN request
2290  */
2291 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292                               struct nfs_openargs *args)
2293 {
2294         struct compound_hdr hdr = {
2295                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296         };
2297 
2298         encode_compound_hdr(xdr, req, &hdr);
2299         encode_sequence(xdr, &args->seq_args, &hdr);
2300         encode_putfh(xdr, args->fh, &hdr);
2301         encode_open(xdr, args, &hdr);
2302         encode_getfh(xdr, &hdr);
2303         if (args->access)
2304                 encode_access(xdr, args->access, &hdr);
2305         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306         encode_nops(&hdr);
2307 }
2308 
2309 /*
2310  * Encode an OPEN_CONFIRM request
2311  */
2312 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313                                       struct xdr_stream *xdr,
2314                                       struct nfs_open_confirmargs *args)
2315 {
2316         struct compound_hdr hdr = {
2317                 .nops   = 0,
2318         };
2319 
2320         encode_compound_hdr(xdr, req, &hdr);
2321         encode_putfh(xdr, args->fh, &hdr);
2322         encode_open_confirm(xdr, args, &hdr);
2323         encode_nops(&hdr);
2324 }
2325 
2326 /*
2327  * Encode an OPEN request with no attributes.
2328  */
2329 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330                                      struct xdr_stream *xdr,
2331                                      struct nfs_openargs *args)
2332 {
2333         struct compound_hdr hdr = {
2334                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335         };
2336 
2337         encode_compound_hdr(xdr, req, &hdr);
2338         encode_sequence(xdr, &args->seq_args, &hdr);
2339         encode_putfh(xdr, args->fh, &hdr);
2340         encode_open(xdr, args, &hdr);
2341         if (args->access)
2342                 encode_access(xdr, args->access, &hdr);
2343         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344         encode_nops(&hdr);
2345 }
2346 
2347 /*
2348  * Encode an OPEN_DOWNGRADE request
2349  */
2350 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351                                         struct xdr_stream *xdr,
2352                                         struct nfs_closeargs *args)
2353 {
2354         struct compound_hdr hdr = {
2355                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356         };
2357 
2358         encode_compound_hdr(xdr, req, &hdr);
2359         encode_sequence(xdr, &args->seq_args, &hdr);
2360         encode_putfh(xdr, args->fh, &hdr);
2361         if (args->lr_args)
2362                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2363         encode_open_downgrade(xdr, args, &hdr);
2364         encode_nops(&hdr);
2365 }
2366 
2367 /*
2368  * Encode a LOCK request
2369  */
2370 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371                               struct nfs_lock_args *args)
2372 {
2373         struct compound_hdr hdr = {
2374                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375         };
2376 
2377         encode_compound_hdr(xdr, req, &hdr);
2378         encode_sequence(xdr, &args->seq_args, &hdr);
2379         encode_putfh(xdr, args->fh, &hdr);
2380         encode_lock(xdr, args, &hdr);
2381         encode_nops(&hdr);
2382 }
2383 
2384 /*
2385  * Encode a LOCKT request
2386  */
2387 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388                                struct nfs_lockt_args *args)
2389 {
2390         struct compound_hdr hdr = {
2391                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392         };
2393 
2394         encode_compound_hdr(xdr, req, &hdr);
2395         encode_sequence(xdr, &args->seq_args, &hdr);
2396         encode_putfh(xdr, args->fh, &hdr);
2397         encode_lockt(xdr, args, &hdr);
2398         encode_nops(&hdr);
2399 }
2400 
2401 /*
2402  * Encode a LOCKU request
2403  */
2404 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                                struct nfs_locku_args *args)
2406 {
2407         struct compound_hdr hdr = {
2408                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409         };
2410 
2411         encode_compound_hdr(xdr, req, &hdr);
2412         encode_sequence(xdr, &args->seq_args, &hdr);
2413         encode_putfh(xdr, args->fh, &hdr);
2414         encode_locku(xdr, args, &hdr);
2415         encode_nops(&hdr);
2416 }
2417 
2418 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419                                            struct xdr_stream *xdr,
2420                                         struct nfs_release_lockowner_args *args)
2421 {
2422         struct compound_hdr hdr = {
2423                 .minorversion = 0,
2424         };
2425 
2426         encode_compound_hdr(xdr, req, &hdr);
2427         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428         encode_nops(&hdr);
2429 }
2430 
2431 /*
2432  * Encode a READLINK request
2433  */
2434 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                                   const struct nfs4_readlink *args)
2436 {
2437         struct compound_hdr hdr = {
2438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439         };
2440 
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         encode_readlink(xdr, args, req, &hdr);
2445 
2446         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447                         args->pgbase, args->pglen);
2448         encode_nops(&hdr);
2449 }
2450 
2451 /*
2452  * Encode a READDIR request
2453  */
2454 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                  const struct nfs4_readdir_arg *args)
2456 {
2457         struct compound_hdr hdr = {
2458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459         };
2460 
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_sequence(xdr, &args->seq_args, &hdr);
2463         encode_putfh(xdr, args->fh, &hdr);
2464         encode_readdir(xdr, args, req, &hdr);
2465 
2466         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467                          args->pgbase, args->count);
2468         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469                         __func__, hdr.replen << 2, args->pages,
2470                         args->pgbase, args->count);
2471         encode_nops(&hdr);
2472 }
2473 
2474 /*
2475  * Encode a READ request
2476  */
2477 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478                               struct nfs_pgio_args *args)
2479 {
2480         struct compound_hdr hdr = {
2481                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482         };
2483 
2484         encode_compound_hdr(xdr, req, &hdr);
2485         encode_sequence(xdr, &args->seq_args, &hdr);
2486         encode_putfh(xdr, args->fh, &hdr);
2487         encode_read(xdr, args, &hdr);
2488 
2489         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490                          args->pages, args->pgbase, args->count);
2491         req->rq_rcv_buf.flags |= XDRBUF_READ;
2492         encode_nops(&hdr);
2493 }
2494 
2495 /*
2496  * Encode an SETATTR request
2497  */
2498 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                  struct nfs_setattrargs *args)
2500 {
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504 
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_setattr(xdr, args, args->server, &hdr);
2509         encode_getfattr(xdr, args->bitmask, &hdr);
2510         encode_nops(&hdr);
2511 }
2512 
2513 /*
2514  * Encode a GETACL request
2515  */
2516 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                 struct nfs_getaclargs *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521         };
2522         uint32_t replen;
2523 
2524         encode_compound_hdr(xdr, req, &hdr);
2525         encode_sequence(xdr, &args->seq_args, &hdr);
2526         encode_putfh(xdr, args->fh, &hdr);
2527         replen = hdr.replen + op_decode_hdr_maxsz;
2528         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529 
2530         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531                 args->acl_pages, 0, args->acl_len);
2532 
2533         encode_nops(&hdr);
2534 }
2535 
2536 /*
2537  * Encode a WRITE request
2538  */
2539 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                struct nfs_pgio_args *args)
2541 {
2542         struct compound_hdr hdr = {
2543                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544         };
2545 
2546         encode_compound_hdr(xdr, req, &hdr);
2547         encode_sequence(xdr, &args->seq_args, &hdr);
2548         encode_putfh(xdr, args->fh, &hdr);
2549         encode_write(xdr, args, &hdr);
2550         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551         if (args->bitmask)
2552                 encode_getfattr(xdr, args->bitmask, &hdr);
2553         encode_nops(&hdr);
2554 }
2555 
2556 /*
2557  *  a COMMIT request
2558  */
2559 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560                                 struct nfs_commitargs *args)
2561 {
2562         struct compound_hdr hdr = {
2563                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564         };
2565 
2566         encode_compound_hdr(xdr, req, &hdr);
2567         encode_sequence(xdr, &args->seq_args, &hdr);
2568         encode_putfh(xdr, args->fh, &hdr);
2569         encode_commit(xdr, args, &hdr);
2570         encode_nops(&hdr);
2571 }
2572 
2573 /*
2574  * FSINFO request
2575  */
2576 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577                                 struct nfs4_fsinfo_arg *args)
2578 {
2579         struct compound_hdr hdr = {
2580                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581         };
2582 
2583         encode_compound_hdr(xdr, req, &hdr);
2584         encode_sequence(xdr, &args->seq_args, &hdr);
2585         encode_putfh(xdr, args->fh, &hdr);
2586         encode_fsinfo(xdr, args->bitmask, &hdr);
2587         encode_nops(&hdr);
2588 }
2589 
2590 /*
2591  * a PATHCONF request
2592  */
2593 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594                                   const struct nfs4_pathconf_arg *args)
2595 {
2596         struct compound_hdr hdr = {
2597                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598         };
2599 
2600         encode_compound_hdr(xdr, req, &hdr);
2601         encode_sequence(xdr, &args->seq_args, &hdr);
2602         encode_putfh(xdr, args->fh, &hdr);
2603         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604                            &hdr);
2605         encode_nops(&hdr);
2606 }
2607 
2608 /*
2609  * a STATFS request
2610  */
2611 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612                                 const struct nfs4_statfs_arg *args)
2613 {
2614         struct compound_hdr hdr = {
2615                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616         };
2617 
2618         encode_compound_hdr(xdr, req, &hdr);
2619         encode_sequence(xdr, &args->seq_args, &hdr);
2620         encode_putfh(xdr, args->fh, &hdr);
2621         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623         encode_nops(&hdr);
2624 }
2625 
2626 /*
2627  * GETATTR_BITMAP request
2628  */
2629 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630                                      struct xdr_stream *xdr,
2631                                      struct nfs4_server_caps_arg *args)
2632 {
2633         const u32 *bitmask = args->bitmask;
2634         struct compound_hdr hdr = {
2635                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636         };
2637 
2638         encode_compound_hdr(xdr, req, &hdr);
2639         encode_sequence(xdr, &args->seq_args, &hdr);
2640         encode_putfh(xdr, args->fhandle, &hdr);
2641         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642         encode_nops(&hdr);
2643 }
2644 
2645 /*
2646  * a RENEW request
2647  */
2648 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649                                struct nfs_client *clp)
2650 {
2651         struct compound_hdr hdr = {
2652                 .nops   = 0,
2653         };
2654 
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_renew(xdr, clp->cl_clientid, &hdr);
2657         encode_nops(&hdr);
2658 }
2659 
2660 /*
2661  * a SETCLIENTID request
2662  */
2663 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      struct nfs4_setclientid *sc)
2666 {
2667         struct compound_hdr hdr = {
2668                 .nops   = 0,
2669         };
2670 
2671         encode_compound_hdr(xdr, req, &hdr);
2672         encode_setclientid(xdr, sc, &hdr);
2673         encode_nops(&hdr);
2674 }
2675 
2676 /*
2677  * a SETCLIENTID_CONFIRM request
2678  */
2679 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680                                              struct xdr_stream *xdr,
2681                                              struct nfs4_setclientid_res *arg)
2682 {
2683         struct compound_hdr hdr = {
2684                 .nops   = 0,
2685         };
2686 
2687         encode_compound_hdr(xdr, req, &hdr);
2688         encode_setclientid_confirm(xdr, arg, &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         if (args->lr_args)
2707                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2708         if (args->bitmask)
2709                 encode_getfattr(xdr, args->bitmask, &hdr);
2710         encode_delegreturn(xdr, args->stateid, &hdr);
2711         encode_nops(&hdr);
2712 }
2713 
2714 /*
2715  * Encode FS_LOCATIONS request
2716  */
2717 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2718                                       struct xdr_stream *xdr,
2719                                       struct nfs4_fs_locations_arg *args)
2720 {
2721         struct compound_hdr hdr = {
2722                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2723         };
2724         uint32_t replen;
2725 
2726         encode_compound_hdr(xdr, req, &hdr);
2727         encode_sequence(xdr, &args->seq_args, &hdr);
2728         if (args->migration) {
2729                 encode_putfh(xdr, args->fh, &hdr);
2730                 replen = hdr.replen;
2731                 encode_fs_locations(xdr, args->bitmask, &hdr);
2732                 if (args->renew)
2733                         encode_renew(xdr, args->clientid, &hdr);
2734         } else {
2735                 encode_putfh(xdr, args->dir_fh, &hdr);
2736                 encode_lookup(xdr, args->name, &hdr);
2737                 replen = hdr.replen;
2738                 encode_fs_locations(xdr, args->bitmask, &hdr);
2739         }
2740 
2741         /* Set up reply kvec to capture returned fs_locations array. */
2742         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2743                         0, PAGE_SIZE);
2744         encode_nops(&hdr);
2745 }
2746 
2747 /*
2748  * Encode SECINFO request
2749  */
2750 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2751                                 struct xdr_stream *xdr,
2752                                 struct nfs4_secinfo_arg *args)
2753 {
2754         struct compound_hdr hdr = {
2755                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2756         };
2757 
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_sequence(xdr, &args->seq_args, &hdr);
2760         encode_putfh(xdr, args->dir_fh, &hdr);
2761         encode_secinfo(xdr, args->name, &hdr);
2762         encode_nops(&hdr);
2763 }
2764 
2765 /*
2766  * Encode FSID_PRESENT request
2767  */
2768 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2769                                       struct xdr_stream *xdr,
2770                                       struct nfs4_fsid_present_arg *args)
2771 {
2772         struct compound_hdr hdr = {
2773                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774         };
2775 
2776         encode_compound_hdr(xdr, req, &hdr);
2777         encode_sequence(xdr, &args->seq_args, &hdr);
2778         encode_putfh(xdr, args->fh, &hdr);
2779         encode_getfh(xdr, &hdr);
2780         if (args->renew)
2781                 encode_renew(xdr, args->clientid, &hdr);
2782         encode_nops(&hdr);
2783 }
2784 
2785 #if defined(CONFIG_NFS_V4_1)
2786 /*
2787  * BIND_CONN_TO_SESSION request
2788  */
2789 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2790                                 struct xdr_stream *xdr,
2791                                 struct nfs41_bind_conn_to_session_args *args)
2792 {
2793         struct compound_hdr hdr = {
2794                 .minorversion = args->client->cl_mvops->minor_version,
2795         };
2796 
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_bind_conn_to_session(xdr, args, &hdr);
2799         encode_nops(&hdr);
2800 }
2801 
2802 /*
2803  * EXCHANGE_ID request
2804  */
2805 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2806                                      struct xdr_stream *xdr,
2807                                      struct nfs41_exchange_id_args *args)
2808 {
2809         struct compound_hdr hdr = {
2810                 .minorversion = args->client->cl_mvops->minor_version,
2811         };
2812 
2813         encode_compound_hdr(xdr, req, &hdr);
2814         encode_exchange_id(xdr, args, &hdr);
2815         encode_nops(&hdr);
2816 }
2817 
2818 /*
2819  * a CREATE_SESSION request
2820  */
2821 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2822                                         struct xdr_stream *xdr,
2823                                         struct nfs41_create_session_args *args)
2824 {
2825         struct compound_hdr hdr = {
2826                 .minorversion = args->client->cl_mvops->minor_version,
2827         };
2828 
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_create_session(xdr, args, &hdr);
2831         encode_nops(&hdr);
2832 }
2833 
2834 /*
2835  * a DESTROY_SESSION request
2836  */
2837 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2838                                          struct xdr_stream *xdr,
2839                                          struct nfs4_session *session)
2840 {
2841         struct compound_hdr hdr = {
2842                 .minorversion = session->clp->cl_mvops->minor_version,
2843         };
2844 
2845         encode_compound_hdr(xdr, req, &hdr);
2846         encode_destroy_session(xdr, session, &hdr);
2847         encode_nops(&hdr);
2848 }
2849 
2850 /*
2851  * a DESTROY_CLIENTID request
2852  */
2853 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2854                                          struct xdr_stream *xdr,
2855                                          struct nfs_client *clp)
2856 {
2857         struct compound_hdr hdr = {
2858                 .minorversion = clp->cl_mvops->minor_version,
2859         };
2860 
2861         encode_compound_hdr(xdr, req, &hdr);
2862         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2863         encode_nops(&hdr);
2864 }
2865 
2866 /*
2867  * a SEQUENCE request
2868  */
2869 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2870                                   struct nfs4_sequence_args *args)
2871 {
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(args),
2874         };
2875 
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, args, &hdr);
2878         encode_nops(&hdr);
2879 }
2880 
2881 /*
2882  * a GET_LEASE_TIME request
2883  */
2884 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2885                                         struct xdr_stream *xdr,
2886                                         struct nfs4_get_lease_time_args *args)
2887 {
2888         struct compound_hdr hdr = {
2889                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2890         };
2891         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2892 
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->la_seq_args, &hdr);
2895         encode_putrootfh(xdr, &hdr);
2896         encode_fsinfo(xdr, lease_bitmap, &hdr);
2897         encode_nops(&hdr);
2898 }
2899 
2900 /*
2901  * a RECLAIM_COMPLETE request
2902  */
2903 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2904                                           struct xdr_stream *xdr,
2905                                 struct nfs41_reclaim_complete_args *args)
2906 {
2907         struct compound_hdr hdr = {
2908                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2909         };
2910 
2911         encode_compound_hdr(xdr, req, &hdr);
2912         encode_sequence(xdr, &args->seq_args, &hdr);
2913         encode_reclaim_complete(xdr, args, &hdr);
2914         encode_nops(&hdr);
2915 }
2916 
2917 /*
2918  * Encode GETDEVICEINFO request
2919  */
2920 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2921                                        struct xdr_stream *xdr,
2922                                        struct nfs4_getdeviceinfo_args *args)
2923 {
2924         struct compound_hdr hdr = {
2925                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926         };
2927 
2928         encode_compound_hdr(xdr, req, &hdr);
2929         encode_sequence(xdr, &args->seq_args, &hdr);
2930         encode_getdeviceinfo(xdr, args, &hdr);
2931 
2932         /* set up reply kvec. Subtract notification bitmap max size (2)
2933          * so that notification bitmap is put in xdr_buf tail */
2934         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2935                          args->pdev->pages, args->pdev->pgbase,
2936                          args->pdev->pglen);
2937 
2938         encode_nops(&hdr);
2939 }
2940 
2941 /*
2942  *  Encode LAYOUTGET request
2943  */
2944 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2945                                    struct xdr_stream *xdr,
2946                                    struct nfs4_layoutget_args *args)
2947 {
2948         struct compound_hdr hdr = {
2949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950         };
2951 
2952         encode_compound_hdr(xdr, req, &hdr);
2953         encode_sequence(xdr, &args->seq_args, &hdr);
2954         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955         encode_layoutget(xdr, args, &hdr);
2956 
2957         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2958             args->layout.pages, 0, args->layout.pglen);
2959 
2960         encode_nops(&hdr);
2961 }
2962 
2963 /*
2964  *  Encode LAYOUTCOMMIT request
2965  */
2966 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2967                                       struct xdr_stream *xdr,
2968                                       struct nfs4_layoutcommit_args *args)
2969 {
2970         struct nfs4_layoutcommit_data *data =
2971                 container_of(args, struct nfs4_layoutcommit_data, args);
2972         struct compound_hdr hdr = {
2973                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2974         };
2975 
2976         encode_compound_hdr(xdr, req, &hdr);
2977         encode_sequence(xdr, &args->seq_args, &hdr);
2978         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2979         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2980         encode_getfattr(xdr, args->bitmask, &hdr);
2981         encode_nops(&hdr);
2982 }
2983 
2984 /*
2985  * Encode LAYOUTRETURN request
2986  */
2987 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2988                                       struct xdr_stream *xdr,
2989                                       struct nfs4_layoutreturn_args *args)
2990 {
2991         struct compound_hdr hdr = {
2992                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993         };
2994 
2995         encode_compound_hdr(xdr, req, &hdr);
2996         encode_sequence(xdr, &args->seq_args, &hdr);
2997         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2998         encode_layoutreturn(xdr, args, &hdr);
2999         encode_nops(&hdr);
3000 }
3001 
3002 /*
3003  * Encode SECINFO_NO_NAME request
3004  */
3005 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3006                                         struct xdr_stream *xdr,
3007                                         struct nfs41_secinfo_no_name_args *args)
3008 {
3009         struct compound_hdr hdr = {
3010                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011         };
3012 
3013         encode_compound_hdr(xdr, req, &hdr);
3014         encode_sequence(xdr, &args->seq_args, &hdr);
3015         encode_putrootfh(xdr, &hdr);
3016         encode_secinfo_no_name(xdr, args, &hdr);
3017         encode_nops(&hdr);
3018         return 0;
3019 }
3020 
3021 /*
3022  *  Encode TEST_STATEID request
3023  */
3024 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3025                                       struct xdr_stream *xdr,
3026                                       struct nfs41_test_stateid_args *args)
3027 {
3028         struct compound_hdr hdr = {
3029                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3030         };
3031 
3032         encode_compound_hdr(xdr, req, &hdr);
3033         encode_sequence(xdr, &args->seq_args, &hdr);
3034         encode_test_stateid(xdr, args, &hdr);
3035         encode_nops(&hdr);
3036 }
3037 
3038 /*
3039  *  Encode FREE_STATEID request
3040  */
3041 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3042                                      struct xdr_stream *xdr,
3043                                      struct nfs41_free_stateid_args *args)
3044 {
3045         struct compound_hdr hdr = {
3046                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3047         };
3048 
3049         encode_compound_hdr(xdr, req, &hdr);
3050         encode_sequence(xdr, &args->seq_args, &hdr);
3051         encode_free_stateid(xdr, args, &hdr);
3052         encode_nops(&hdr);
3053 }
3054 #endif /* CONFIG_NFS_V4_1 */
3055 
3056 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3057 {
3058         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3059                 "Remaining buffer length is %tu words.\n",
3060                 func, xdr->end - xdr->p);
3061 }
3062 
3063 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3064 {
3065         __be32 *p;
3066 
3067         p = xdr_inline_decode(xdr, 4);
3068         if (unlikely(!p))
3069                 goto out_overflow;
3070         *len = be32_to_cpup(p);
3071         p = xdr_inline_decode(xdr, *len);
3072         if (unlikely(!p))
3073                 goto out_overflow;
3074         *string = (char *)p;
3075         return 0;
3076 out_overflow:
3077         print_overflow_msg(__func__, xdr);
3078         return -EIO;
3079 }
3080 
3081 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3082 {
3083         __be32 *p;
3084 
3085         p = xdr_inline_decode(xdr, 8);
3086         if (unlikely(!p))
3087                 goto out_overflow;
3088         hdr->status = be32_to_cpup(p++);
3089         hdr->taglen = be32_to_cpup(p);
3090 
3091         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3092         if (unlikely(!p))
3093                 goto out_overflow;
3094         hdr->tag = (char *)p;
3095         p += XDR_QUADLEN(hdr->taglen);
3096         hdr->nops = be32_to_cpup(p);
3097         if (unlikely(hdr->nops < 1))
3098                 return nfs4_stat_to_errno(hdr->status);
3099         return 0;
3100 out_overflow:
3101         print_overflow_msg(__func__, xdr);
3102         return -EIO;
3103 }
3104 
3105 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3106                 int *nfs_retval)
3107 {
3108         __be32 *p;
3109         uint32_t opnum;
3110         int32_t nfserr;
3111 
3112         p = xdr_inline_decode(xdr, 8);
3113         if (unlikely(!p))
3114                 goto out_overflow;
3115         opnum = be32_to_cpup(p++);
3116         if (unlikely(opnum != expected))
3117                 goto out_bad_operation;
3118         nfserr = be32_to_cpup(p);
3119         if (nfserr == NFS_OK)
3120                 *nfs_retval = 0;
3121         else
3122                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3123         return true;
3124 out_bad_operation:
3125         dprintk("nfs: Server returned operation"
3126                 " %d but we issued a request for %d\n",
3127                         opnum, expected);
3128         *nfs_retval = -EREMOTEIO;
3129         return false;
3130 out_overflow:
3131         print_overflow_msg(__func__, xdr);
3132         *nfs_retval = -EIO;
3133         return false;
3134 }
3135 
3136 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3137 {
3138         int retval;
3139 
3140         __decode_op_hdr(xdr, expected, &retval);
3141         return retval;
3142 }
3143 
3144 /* Dummy routine */
3145 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3146 {
3147         __be32 *p;
3148         unsigned int strlen;
3149         char *str;
3150 
3151         p = xdr_inline_decode(xdr, 12);
3152         if (likely(p))
3153                 return decode_opaque_inline(xdr, &strlen, &str);
3154         print_overflow_msg(__func__, xdr);
3155         return -EIO;
3156 }
3157 
3158 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3159 {
3160         uint32_t bmlen;
3161         __be32 *p;
3162 
3163         p = xdr_inline_decode(xdr, 4);
3164         if (unlikely(!p))
3165                 goto out_overflow;
3166         bmlen = be32_to_cpup(p);
3167 
3168         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3169         p = xdr_inline_decode(xdr, (bmlen << 2));
3170         if (unlikely(!p))
3171                 goto out_overflow;
3172         if (bmlen > 0) {
3173                 bitmap[0] = be32_to_cpup(p++);
3174                 if (bmlen > 1) {
3175                         bitmap[1] = be32_to_cpup(p++);
3176                         if (bmlen > 2)
3177                                 bitmap[2] = be32_to_cpup(p);
3178                 }
3179         }
3180         return 0;
3181 out_overflow:
3182         print_overflow_msg(__func__, xdr);
3183         return -EIO;
3184 }
3185 
3186 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3187 {
3188         __be32 *p;
3189 
3190         p = xdr_inline_decode(xdr, 4);
3191         if (unlikely(!p))
3192                 goto out_overflow;
3193         *attrlen = be32_to_cpup(p);
3194         *savep = xdr_stream_pos(xdr);
3195         return 0;
3196 out_overflow:
3197         print_overflow_msg(__func__, xdr);
3198         return -EIO;
3199 }
3200 
3201 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3202 {
3203         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3204                 int ret;
3205                 ret = decode_attr_bitmap(xdr, bitmask);
3206                 if (unlikely(ret < 0))
3207                         return ret;
3208                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3209         } else
3210                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3211         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3212                 bitmask[0], bitmask[1], bitmask[2]);
3213         return 0;
3214 }
3215 
3216 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3217 {
3218         __be32 *p;
3219         int ret = 0;
3220 
3221         *type = 0;
3222         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3223                 return -EIO;
3224         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3225                 p = xdr_inline_decode(xdr, 4);
3226                 if (unlikely(!p))
3227                         goto out_overflow;
3228                 *type = be32_to_cpup(p);
3229                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3230                         dprintk("%s: bad type %d\n", __func__, *type);
3231                         return -EIO;
3232                 }
3233                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3234                 ret = NFS_ATTR_FATTR_TYPE;
3235         }
3236         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3237         return ret;
3238 out_overflow:
3239         print_overflow_msg(__func__, xdr);
3240         return -EIO;
3241 }
3242 
3243 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3244                                       uint32_t *bitmap, uint32_t *type)
3245 {
3246         __be32 *p;
3247 
3248         *type = 0;
3249         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3250                 return -EIO;
3251         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3252                 p = xdr_inline_decode(xdr, 4);
3253                 if (unlikely(!p))
3254                         goto out_overflow;
3255                 *type = be32_to_cpup(p);
3256                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3257         }
3258         dprintk("%s: expire type=0x%x\n", __func__, *type);
3259         return 0;
3260 out_overflow:
3261         print_overflow_msg(__func__, xdr);
3262         return -EIO;
3263 }
3264 
3265 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3266 {
3267         __be32 *p;
3268         int ret = 0;
3269 
3270         *change = 0;
3271         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3272                 return -EIO;
3273         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3274                 p = xdr_inline_decode(xdr, 8);
3275                 if (unlikely(!p))
3276                         goto out_overflow;
3277                 xdr_decode_hyper(p, change);
3278                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3279                 ret = NFS_ATTR_FATTR_CHANGE;
3280         }
3281         dprintk("%s: change attribute=%Lu\n", __func__,
3282                         (unsigned long long)*change);
3283         return ret;
3284 out_overflow:
3285         print_overflow_msg(__func__, xdr);
3286         return -EIO;
3287 }
3288 
3289 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3290 {
3291         __be32 *p;
3292         int ret = 0;
3293 
3294         *size = 0;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3298                 p = xdr_inline_decode(xdr, 8);
3299                 if (unlikely(!p))
3300                         goto out_overflow;
3301                 xdr_decode_hyper(p, size);
3302                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3303                 ret = NFS_ATTR_FATTR_SIZE;
3304         }
3305         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3306         return ret;
3307 out_overflow:
3308         print_overflow_msg(__func__, xdr);
3309         return -EIO;
3310 }
3311 
3312 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3313 {
3314         __be32 *p;
3315 
3316         *res = 0;
3317         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3318                 return -EIO;
3319         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3320                 p = xdr_inline_decode(xdr, 4);
3321                 if (unlikely(!p))
3322                         goto out_overflow;
3323                 *res = be32_to_cpup(p);
3324                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3325         }
3326         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3327         return 0;
3328 out_overflow:
3329         print_overflow_msg(__func__, xdr);
3330         return -EIO;
3331 }
3332 
3333 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3334 {
3335         __be32 *p;
3336 
3337         *res = 0;
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3341                 p = xdr_inline_decode(xdr, 4);
3342                 if (unlikely(!p))
3343                         goto out_overflow;
3344                 *res = be32_to_cpup(p);
3345                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3346         }
3347         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3348         return 0;
3349 out_overflow:
3350         print_overflow_msg(__func__, xdr);
3351         return -EIO;
3352 }
3353 
3354 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3355 {
3356         __be32 *p;
3357         int ret = 0;
3358 
3359         fsid->major = 0;
3360         fsid->minor = 0;
3361         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3362                 return -EIO;
3363         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3364                 p = xdr_inline_decode(xdr, 16);
3365                 if (unlikely(!p))
3366                         goto out_overflow;
3367                 p = xdr_decode_hyper(p, &fsid->major);
3368                 xdr_decode_hyper(p, &fsid->minor);
3369                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3370                 ret = NFS_ATTR_FATTR_FSID;
3371         }
3372         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3373                         (unsigned long long)fsid->major,
3374                         (unsigned long long)fsid->minor);
3375         return ret;
3376 out_overflow:
3377         print_overflow_msg(__func__, xdr);
3378         return -EIO;
3379 }
3380 
3381 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3382 {
3383         __be32 *p;
3384 
3385         *res = 60;
3386         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3387                 return -EIO;
3388         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3389                 p = xdr_inline_decode(xdr, 4);
3390                 if (unlikely(!p))
3391                         goto out_overflow;
3392                 *res = be32_to_cpup(p);
3393                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3394         }
3395         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3396         return 0;
3397 out_overflow:
3398         print_overflow_msg(__func__, xdr);
3399         return -EIO;
3400 }
3401 
3402 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3403 {
3404         __be32 *p;
3405 
3406         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3407                 return -EIO;
3408         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3409                 p = xdr_inline_decode(xdr, 4);
3410                 if (unlikely(!p))
3411                         goto out_overflow;
3412                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3413                 *res = -be32_to_cpup(p);
3414         }
3415         return 0;
3416 out_overflow:
3417         print_overflow_msg(__func__, xdr);
3418         return -EIO;
3419 }
3420 
3421 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3422                                  uint32_t *bitmap, uint32_t *bitmask)
3423 {
3424         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3425                 int ret;
3426                 ret = decode_attr_bitmap(xdr, bitmask);
3427                 if (unlikely(ret < 0))
3428                         return ret;
3429                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3430         } else
3431                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3432         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3433                 bitmask[0], bitmask[1], bitmask[2]);
3434         return 0;
3435 }
3436 
3437 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3438 {
3439         __be32 *p;
3440         int len;
3441 
3442         if (fh != NULL)
3443                 memset(fh, 0, sizeof(*fh));
3444 
3445         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3446                 return -EIO;
3447         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3448                 p = xdr_inline_decode(xdr, 4);
3449                 if (unlikely(!p))
3450                         goto out_overflow;
3451                 len = be32_to_cpup(p);
3452                 if (len > NFS4_FHSIZE)
3453                         return -EIO;
3454                 p = xdr_inline_decode(xdr, len);
3455                 if (unlikely(!p))
3456                         goto out_overflow;
3457                 if (fh != NULL) {
3458                         memcpy(fh->data, p, len);
3459                         fh->size = len;
3460                 }
3461                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3462         }
3463         return 0;
3464 out_overflow:
3465         print_overflow_msg(__func__, xdr);
3466         return -EIO;
3467 }
3468 
3469 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3470 {
3471         __be32 *p;
3472 
3473         *res = 0;
3474         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3475                 return -EIO;
3476         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3477                 p = xdr_inline_decode(xdr, 4);
3478                 if (unlikely(!p))
3479                         goto out_overflow;
3480                 *res = be32_to_cpup(p);
3481                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3482         }
3483         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3484         return 0;
3485 out_overflow:
3486         print_overflow_msg(__func__, xdr);
3487         return -EIO;
3488 }
3489 
3490 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3491 {
3492         __be32 *p;
3493         int ret = 0;
3494 
3495         *fileid = 0;
3496         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3497                 return -EIO;
3498         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3499                 p = xdr_inline_decode(xdr, 8);
3500                 if (unlikely(!p))
3501                         goto out_overflow;
3502                 xdr_decode_hyper(p, fileid);
3503                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3504                 ret = NFS_ATTR_FATTR_FILEID;
3505         }
3506         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3507         return ret;
3508 out_overflow:
3509         print_overflow_msg(__func__, xdr);
3510         return -EIO;
3511 }
3512 
3513 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3514 {
3515         __be32 *p;
3516         int ret = 0;
3517 
3518         *fileid = 0;
3519         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3520                 return -EIO;
3521         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3522                 p = xdr_inline_decode(xdr, 8);
3523                 if (unlikely(!p))
3524                         goto out_overflow;
3525                 xdr_decode_hyper(p, fileid);
3526                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3527                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3528         }
3529         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3530         return ret;
3531 out_overflow:
3532         print_overflow_msg(__func__, xdr);
3533         return -EIO;
3534 }
3535 
3536 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3537 {
3538         __be32 *p;
3539         int status = 0;
3540 
3541         *res = 0;
3542         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3543                 return -EIO;
3544         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3545                 p = xdr_inline_decode(xdr, 8);
3546                 if (unlikely(!p))
3547                         goto out_overflow;
3548                 xdr_decode_hyper(p, res);
3549                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3550         }
3551         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3552         return status;
3553 out_overflow:
3554         print_overflow_msg(__func__, xdr);
3555         return -EIO;
3556 }
3557 
3558 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3559 {
3560         __be32 *p;
3561         int status = 0;
3562 
3563         *res = 0;
3564         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3565                 return -EIO;
3566         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3567                 p = xdr_inline_decode(xdr, 8);
3568                 if (unlikely(!p))
3569                         goto out_overflow;
3570                 xdr_decode_hyper(p, res);
3571                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3572         }
3573         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3574         return status;
3575 out_overflow:
3576         print_overflow_msg(__func__, xdr);
3577         return -EIO;
3578 }
3579 
3580 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3581 {
3582         __be32 *p;
3583         int status = 0;
3584 
3585         *res = 0;
3586         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3587                 return -EIO;
3588         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3589                 p = xdr_inline_decode(xdr, 8);
3590                 if (unlikely(!p))
3591                         goto out_overflow;
3592                 xdr_decode_hyper(p, res);
3593                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3594         }
3595         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3596         return status;
3597 out_overflow:
3598         print_overflow_msg(__func__, xdr);
3599         return -EIO;
3600 }
3601 
3602 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3603 {
3604         u32 n;
3605         __be32 *p;
3606         int status = 0;
3607 
3608         p = xdr_inline_decode(xdr, 4);
3609         if (unlikely(!p))
3610                 goto out_overflow;
3611         n = be32_to_cpup(p);
3612         if (n == 0)
3613                 goto root_path;
3614         dprintk("pathname4: ");
3615         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3616                 dprintk("cannot parse %d components in path\n", n);
3617                 goto out_eio;
3618         }
3619         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3620                 struct nfs4_string *component = &path->components[path->ncomponents];
3621                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3622                 if (unlikely(status != 0))
3623                         goto out_eio;
3624                 ifdebug (XDR)
3625                         pr_cont("%s%.*s ",
3626                                 (path->ncomponents != n ? "/ " : ""),
3627                                 component->len, component->data);
3628         }
3629 out:
3630         return status;
3631 root_path:
3632 /* a root pathname is sent as a zero component4 */
3633         path->ncomponents = 1;
3634         path->components[0].len=0;
3635         path->components[0].data=NULL;
3636         dprintk("pathname4: /\n");
3637         goto out;
3638 out_eio:
3639         dprintk(" status %d", status);
3640         status = -EIO;
3641         goto out;
3642 out_overflow:
3643         print_overflow_msg(__func__, xdr);
3644         return -EIO;
3645 }
3646 
3647 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3648 {
3649         int n;
3650         __be32 *p;
3651         int status = -EIO;
3652 
3653         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3654                 goto out;
3655         status = 0;
3656         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3657                 goto out;
3658         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3659         status = -EIO;
3660         /* Ignore borken servers that return unrequested attrs */
3661         if (unlikely(res == NULL))
3662                 goto out;
3663         dprintk("%s: fsroot:\n", __func__);
3664         status = decode_pathname(xdr, &res->fs_path);
3665         if (unlikely(status != 0))
3666                 goto out;
3667         p = xdr_inline_decode(xdr, 4);
3668         if (unlikely(!p))
3669                 goto out_overflow;
3670         n = be32_to_cpup(p);
3671         if (n <= 0)
3672                 goto out_eio;
3673         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3674                 u32 m;
3675                 struct nfs4_fs_location *loc;
3676 
3677                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3678                         break;
3679                 loc = &res->locations[res->nlocations];
3680                 p = xdr_inline_decode(xdr, 4);
3681                 if (unlikely(!p))
3682                         goto out_overflow;
3683                 m = be32_to_cpup(p);
3684 
3685                 dprintk("%s: servers:\n", __func__);
3686                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3687                         struct nfs4_string *server;
3688 
3689                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3690                                 unsigned int i;
3691                                 dprintk("%s: using first %u of %u servers "
3692                                         "returned for location %u\n",
3693                                                 __func__,
3694                                                 NFS4_FS_LOCATION_MAXSERVERS,
3695                                                 m, res->nlocations);
3696                                 for (i = loc->nservers; i < m; i++) {
3697                                         unsigned int len;
3698                                         char *data;
3699                                         status = decode_opaque_inline(xdr, &len, &data);
3700                                         if (unlikely(status != 0))
3701                                                 goto out_eio;
3702                                 }
3703                                 break;
3704                         }
3705                         server = &loc->servers[loc->nservers];
3706                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3707                         if (unlikely(status != 0))
3708                                 goto out_eio;
3709                         dprintk("%s ", server->data);
3710                 }
3711                 status = decode_pathname(xdr, &loc->rootpath);
3712                 if (unlikely(status != 0))
3713                         goto out_eio;
3714         }
3715         if (res->nlocations != 0)
3716                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3717 out:
3718         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3719         return status;
3720 out_overflow:
3721         print_overflow_msg(__func__, xdr);
3722 out_eio:
3723         status = -EIO;
3724         goto out;
3725 }
3726 
3727 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3728 {
3729         __be32 *p;
3730         int status = 0;
3731 
3732         *res = 0;
3733         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3734                 return -EIO;
3735         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3736                 p = xdr_inline_decode(xdr, 8);
3737                 if (unlikely(!p))
3738                         goto out_overflow;
3739                 xdr_decode_hyper(p, res);
3740                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3741         }
3742         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3743         return status;
3744 out_overflow:
3745         print_overflow_msg(__func__, xdr);
3746         return -EIO;
3747 }
3748 
3749 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3750 {
3751         __be32 *p;
3752         int status = 0;
3753 
3754         *maxlink = 1;
3755         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3756                 return -EIO;
3757         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3758                 p = xdr_inline_decode(xdr, 4);
3759                 if (unlikely(!p))
3760                         goto out_overflow;
3761                 *maxlink = be32_to_cpup(p);
3762                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3763         }
3764         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3765         return status;
3766 out_overflow:
3767         print_overflow_msg(__func__, xdr);
3768         return -EIO;
3769 }
3770 
3771 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772 {
3773         __be32 *p;
3774         int status = 0;
3775 
3776         *maxname = 1024;
3777         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         goto out_overflow;
3783                 *maxname = be32_to_cpup(p);
3784                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785         }
3786         dprintk("%s: maxname=%u\n", __func__, *maxname);
3787         return status;
3788 out_overflow:
3789         print_overflow_msg(__func__, xdr);
3790         return -EIO;
3791 }
3792 
3793 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3794 {
3795         __be32 *p;
3796         int status = 0;
3797 
3798         *res = 1024;
3799         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3800                 return -EIO;
3801         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3802                 uint64_t maxread;
3803                 p = xdr_inline_decode(xdr, 8);
3804                 if (unlikely(!p))
3805                         goto out_overflow;
3806                 xdr_decode_hyper(p, &maxread);
3807                 if (maxread > 0x7FFFFFFF)
3808                         maxread = 0x7FFFFFFF;
3809                 *res = (uint32_t)maxread;
3810                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811         }
3812         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813         return status;
3814 out_overflow:
3815         print_overflow_msg(__func__, xdr);
3816         return -EIO;
3817 }
3818 
3819 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3820 {
3821         __be32 *p;
3822         int status = 0;
3823 
3824         *res = 1024;
3825         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3826                 return -EIO;
3827         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3828                 uint64_t maxwrite;
3829                 p = xdr_inline_decode(xdr, 8);
3830                 if (unlikely(!p))
3831                         goto out_overflow;
3832                 xdr_decode_hyper(p, &maxwrite);
3833                 if (maxwrite > 0x7FFFFFFF)
3834                         maxwrite = 0x7FFFFFFF;
3835                 *res = (uint32_t)maxwrite;
3836                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3837         }
3838         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3839         return status;
3840 out_overflow:
3841         print_overflow_msg(__func__, xdr);
3842         return -EIO;
3843 }
3844 
3845 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3846 {
3847         uint32_t tmp;
3848         __be32 *p;
3849         int ret = 0;
3850 
3851         *mode = 0;
3852         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3853                 return -EIO;
3854         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3855                 p = xdr_inline_decode(xdr, 4);
3856                 if (unlikely(!p))
3857                         goto out_overflow;
3858                 tmp = be32_to_cpup(p);
3859                 *mode = tmp & ~S_IFMT;
3860                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3861                 ret = NFS_ATTR_FATTR_MODE;
3862         }
3863         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3864         return ret;
3865 out_overflow:
3866         print_overflow_msg(__func__, xdr);
3867         return -EIO;
3868 }
3869 
3870 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3871 {
3872         __be32 *p;
3873         int ret = 0;
3874 
3875         *nlink = 1;
3876         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3877                 return -EIO;
3878         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3879                 p = xdr_inline_decode(xdr, 4);
3880                 if (unlikely(!p))
3881                         goto out_overflow;
3882                 *nlink = be32_to_cpup(p);
3883                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3884                 ret = NFS_ATTR_FATTR_NLINK;
3885         }
3886         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3887         return ret;
3888 out_overflow:
3889         print_overflow_msg(__func__, xdr);
3890         return -EIO;
3891 }
3892 
3893 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3894                 const struct nfs_server *server, kuid_t *uid,
3895                 struct nfs4_string *owner_name)
3896 {
3897         uint32_t len;
3898         __be32 *p;
3899         int ret = 0;
3900 
3901         *uid = make_kuid(&init_user_ns, -2);
3902         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903                 return -EIO;
3904         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3905                 p = xdr_inline_decode(xdr, 4);
3906                 if (unlikely(!p))
3907                         goto out_overflow;
3908                 len = be32_to_cpup(p);
3909                 p = xdr_inline_decode(xdr, len);
3910                 if (unlikely(!p))
3911                         goto out_overflow;
3912                 if (owner_name != NULL) {
3913                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3914                         if (owner_name->data != NULL) {
3915                                 owner_name->len = len;
3916                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3917                         }
3918                 } else if (len < XDR_MAX_NETOBJ) {
3919                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3920                                 ret = NFS_ATTR_FATTR_OWNER;
3921                         else
3922                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3923                                                 __func__);
3924                 } else
3925                         dprintk("%s: name too long (%u)!\n",
3926                                         __func__, len);
3927                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3928         }
3929         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3930         return ret;
3931 out_overflow:
3932         print_overflow_msg(__func__, xdr);
3933         return -EIO;
3934 }
3935 
3936 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3937                 const struct nfs_server *server, kgid_t *gid,
3938                 struct nfs4_string *group_name)
3939 {
3940         uint32_t len;
3941         __be32 *p;
3942         int ret = 0;
3943 
3944         *gid = make_kgid(&init_user_ns, -2);
3945         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3946                 return -EIO;
3947         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3948                 p = xdr_inline_decode(xdr, 4);
3949                 if (unlikely(!p))
3950                         goto out_overflow;
3951                 len = be32_to_cpup(p);
3952                 p = xdr_inline_decode(xdr, len);
3953                 if (unlikely(!p))
3954                         goto out_overflow;
3955                 if (group_name != NULL) {
3956                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3957                         if (group_name->data != NULL) {
3958                                 group_name->len = len;
3959                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3960                         }
3961                 } else if (len < XDR_MAX_NETOBJ) {
3962                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3963                                 ret = NFS_ATTR_FATTR_GROUP;
3964                         else
3965                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3966                                                 __func__);
3967                 } else
3968                         dprintk("%s: name too long (%u)!\n",
3969                                         __func__, len);
3970                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3971         }
3972         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3973         return ret;
3974 out_overflow:
3975         print_overflow_msg(__func__, xdr);
3976         return -EIO;
3977 }
3978 
3979 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3980 {
3981         uint32_t major = 0, minor = 0;
3982         __be32 *p;
3983         int ret = 0;
3984 
3985         *rdev = MKDEV(0,0);
3986         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3987                 return -EIO;
3988         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3989                 dev_t tmp;
3990 
3991                 p = xdr_inline_decode(xdr, 8);
3992                 if (unlikely(!p))
3993                         goto out_overflow;
3994                 major = be32_to_cpup(p++);
3995                 minor = be32_to_cpup(p);
3996                 tmp = MKDEV(major, minor);
3997                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3998                         *rdev = tmp;
3999                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4000                 ret = NFS_ATTR_FATTR_RDEV;
4001         }
4002         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4003         return ret;
4004 out_overflow:
4005         print_overflow_msg(__func__, xdr);
4006         return -EIO;
4007 }
4008 
4009 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010 {
4011         __be32 *p;
4012         int status = 0;
4013 
4014         *res = 0;
4015         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4016                 return -EIO;
4017         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4018                 p = xdr_inline_decode(xdr, 8);
4019                 if (unlikely(!p))
4020                         goto out_overflow;
4021                 xdr_decode_hyper(p, res);
4022                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4023         }
4024         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4025         return status;
4026 out_overflow:
4027         print_overflow_msg(__func__, xdr);
4028         return -EIO;
4029 }
4030 
4031 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4032 {
4033         __be32 *p;
4034         int status = 0;
4035 
4036         *res = 0;
4037         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4038                 return -EIO;
4039         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4040                 p = xdr_inline_decode(xdr, 8);
4041                 if (unlikely(!p))
4042                         goto out_overflow;
4043                 xdr_decode_hyper(p, res);
4044                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4045         }
4046         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4047         return status;
4048 out_overflow:
4049         print_overflow_msg(__func__, xdr);
4050         return -EIO;
4051 }
4052 
4053 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4054 {
4055         __be32 *p;
4056         int status = 0;
4057 
4058         *res = 0;
4059         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4060                 return -EIO;
4061         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4062                 p = xdr_inline_decode(xdr, 8);
4063                 if (unlikely(!p))
4064                         goto out_overflow;
4065                 xdr_decode_hyper(p, res);
4066                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4067         }
4068         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4069         return status;
4070 out_overflow:
4071         print_overflow_msg(__func__, xdr);
4072         return -EIO;
4073 }
4074 
4075 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4076 {
4077         __be32 *p;
4078         int ret = 0;
4079 
4080         *used = 0;
4081         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4082                 return -EIO;
4083         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4084                 p = xdr_inline_decode(xdr, 8);
4085                 if (unlikely(!p))
4086                         goto out_overflow;
4087                 xdr_decode_hyper(p, used);
4088                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4089                 ret = NFS_ATTR_FATTR_SPACE_USED;
4090         }
4091         dprintk("%s: space used=%Lu\n", __func__,
4092                         (unsigned long long)*used);
4093         return ret;
4094 out_overflow:
4095         print_overflow_msg(__func__, xdr);
4096         return -EIO;
4097 }
4098 
4099 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4100 {
4101         __be32 *p;
4102         uint64_t sec;
4103         uint32_t nsec;
4104 
4105         p = xdr_inline_decode(xdr, 12);
4106         if (unlikely(!p))
4107                 goto out_overflow;
4108         p = xdr_decode_hyper(p, &sec);
4109         nsec = be32_to_cpup(p);
4110         time->tv_sec = (time_t)sec;
4111         time->tv_nsec = (long)nsec;
4112         return 0;
4113 out_overflow:
4114         print_overflow_msg(__func__, xdr);
4115         return -EIO;
4116 }
4117 
4118 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4119 {
4120         int status = 0;
4121 
4122         time->tv_sec = 0;
4123         time->tv_nsec = 0;
4124         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4125                 return -EIO;
4126         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4127                 status = decode_attr_time(xdr, time);
4128                 if (status == 0)
4129                         status = NFS_ATTR_FATTR_ATIME;
4130                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4131         }
4132         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4133         return status;
4134 }
4135 
4136 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4137 {
4138         int status = 0;
4139 
4140         time->tv_sec = 0;
4141         time->tv_nsec = 0;
4142         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4143                 return -EIO;
4144         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4145                 status = decode_attr_time(xdr, time);
4146                 if (status == 0)
4147                         status = NFS_ATTR_FATTR_CTIME;
4148                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4149         }
4150         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4151         return status;
4152 }
4153 
4154 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4155                                   struct timespec *time)
4156 {
4157         int status = 0;
4158 
4159         time->tv_sec = 0;
4160         time->tv_nsec = 0;
4161         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4162                 return -EIO;
4163         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4164                 status = decode_attr_time(xdr, time);
4165                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4166         }
4167         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4168                 (long)time->tv_nsec);
4169         return status;
4170 }
4171 
4172 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4173                                         struct nfs4_label *label)
4174 {
4175         uint32_t pi = 0;
4176         uint32_t lfs = 0;
4177         __u32 len;
4178         __be32 *p;
4179         int status = 0;
4180 
4181         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4182                 return -EIO;
4183         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4184                 p = xdr_inline_decode(xdr, 4);
4185                 if (unlikely(!p))
4186                         goto out_overflow;
4187                 lfs = be32_to_cpup(p++);
4188                 p = xdr_inline_decode(xdr, 4);
4189                 if (unlikely(!p))
4190                         goto out_overflow;
4191                 pi = be32_to_cpup(p++);
4192                 p = xdr_inline_decode(xdr, 4);
4193                 if (unlikely(!p))
4194                         goto out_overflow;
4195                 len = be32_to_cpup(p++);
4196                 p = xdr_inline_decode(xdr, len);
4197                 if (unlikely(!p))
4198                         goto out_overflow;
4199                 if (len < NFS4_MAXLABELLEN) {
4200                         if (label) {
4201                                 memcpy(label->label, p, len);
4202                                 label->len = len;
4203                                 label->pi = pi;
4204                                 label->lfs = lfs;
4205                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4206                         }
4207                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4208                 } else
4209                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4210                                         __func__, len);
4211         }
4212         if (label && label->label)
4213                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4214                         (char *)label->label, label->len, label->pi, label->lfs);
4215         return status;
4216 
4217 out_overflow:
4218         print_overflow_msg(__func__, xdr);
4219         return -EIO;
4220 }
4221 
4222 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4223 {
4224         int status = 0;
4225 
4226         time->tv_sec = 0;
4227         time->tv_nsec = 0;
4228         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4229                 return -EIO;
4230         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4231                 status = decode_attr_time(xdr, time);
4232                 if (status == 0)
4233                         status = NFS_ATTR_FATTR_MTIME;
4234                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4235         }
4236         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4237         return status;
4238 }
4239 
4240 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4241 {
4242         unsigned int attrwords = XDR_QUADLEN(attrlen);
4243         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4244 
4245         if (unlikely(attrwords != nwords)) {
4246                 dprintk("%s: server returned incorrect attribute length: "
4247                         "%u %c %u\n",
4248                                 __func__,
4249                                 attrwords << 2,
4250                                 (attrwords < nwords) ? '<' : '>',
4251                                 nwords << 2);
4252                 return -EIO;
4253         }
4254         return 0;
4255 }
4256 
4257 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4258 {
4259         __be32 *p;
4260 
4261         p = xdr_inline_decode(xdr, 20);
4262         if (unlikely(!p))
4263                 goto out_overflow;
4264         cinfo->atomic = be32_to_cpup(p++);
4265         p = xdr_decode_hyper(p, &cinfo->before);
4266         xdr_decode_hyper(p, &cinfo->after);
4267         return 0;
4268 out_overflow:
4269         print_overflow_msg(__func__, xdr);
4270         return -EIO;
4271 }
4272 
4273 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4274 {
4275         __be32 *p;
4276         uint32_t supp, acc;
4277         int status;
4278 
4279         status = decode_op_hdr(xdr, OP_ACCESS);
4280         if (status)
4281                 return status;
4282         p = xdr_inline_decode(xdr, 8);
4283         if (unlikely(!p))
4284                 goto out_overflow;
4285         supp = be32_to_cpup(p++);
4286         acc = be32_to_cpup(p);
4287         *supported = supp;
4288         *access = acc;
4289         return 0;
4290 out_overflow:
4291         print_overflow_msg(__func__, xdr);
4292         return -EIO;
4293 }
4294 
4295 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4296 {
4297         __be32 *p;
4298 
4299         p = xdr_inline_decode(xdr, len);
4300         if (likely(p)) {
4301                 memcpy(buf, p, len);
4302                 return 0;
4303         }
4304         print_overflow_msg(__func__, xdr);
4305         return -EIO;
4306 }
4307 
4308 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309 {
4310         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4311 }
4312 
4313 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4314 {
4315         stateid->type = NFS4_OPEN_STATEID_TYPE;
4316         return decode_stateid(xdr, stateid);
4317 }
4318 
4319 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4320 {
4321         stateid->type = NFS4_LOCK_STATEID_TYPE;
4322         return decode_stateid(xdr, stateid);
4323 }
4324 
4325 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4326 {
4327         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4328         return decode_stateid(xdr, stateid);
4329 }
4330 
4331 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4332 {
4333         int status;
4334 
4335         status = decode_op_hdr(xdr, OP_CLOSE);
4336         if (status != -EIO)
4337                 nfs_increment_open_seqid(status, res->seqid);
4338         if (!status)
4339                 status = decode_open_stateid(xdr, &res->stateid);
4340         return status;
4341 }
4342 
4343 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4344 {
4345         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4346 }
4347 
4348 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4349 {
4350         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4351 }
4352 
4353 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4354 {
4355         int status;
4356 
4357         status = decode_op_hdr(xdr, OP_COMMIT);
4358         if (!status)
4359                 status = decode_write_verifier(xdr, &res->verf->verifier);
4360         return status;
4361 }
4362 
4363 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4364 {
4365         __be32 *p;
4366         uint32_t bmlen;
4367         int status;
4368 
4369         status = decode_op_hdr(xdr, OP_CREATE);
4370         if (status)
4371                 return status;
4372         if ((status = decode_change_info(xdr, cinfo)))
4373                 return status;
4374         p = xdr_inline_decode(xdr, 4);
4375         if (unlikely(!p))
4376                 goto out_overflow;
4377         bmlen = be32_to_cpup(p);
4378         p = xdr_inline_decode(xdr, bmlen << 2);
4379         if (likely(p))
4380                 return 0;
4381 out_overflow:
4382         print_overflow_msg(__func__, xdr);
4383         return -EIO;
4384 }
4385 
4386 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4387 {
4388         unsigned int savep;
4389         uint32_t attrlen, bitmap[3] = {0};
4390         int status;
4391 
4392         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4395                 goto xdr_error;
4396         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4399                 goto xdr_error;
4400         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4401                                                  &res->fh_expire_type)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4404                 goto xdr_error;
4405         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4406                 goto xdr_error;
4407         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4408                 goto xdr_error;
4409         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4410                                 res->exclcreat_bitmask)) != 0)
4411                 goto xdr_error;
4412         status = verify_attr_len(xdr, savep, attrlen);
4413 xdr_error:
4414         dprintk("%s: xdr returned %d!\n", __func__, -status);
4415         return status;
4416 }
4417 
4418 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4419 {
4420         unsigned int savep;
4421         uint32_t attrlen, bitmap[3] = {0};
4422         int status;
4423 
4424         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4425                 goto xdr_error;
4426         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4427                 goto xdr_error;
4428         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4429                 goto xdr_error;
4430 
4431         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4432                 goto xdr_error;
4433         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4434                 goto xdr_error;
4435         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4436                 goto xdr_error;
4437 
4438         status = -EIO;
4439         if (unlikely(bitmap[0]))
4440                 goto xdr_error;
4441 
4442         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4443                 goto xdr_error;
4444         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4445                 goto xdr_error;
4446         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4447                 goto xdr_error;
4448 
4449         status = verify_attr_len(xdr, savep, attrlen);
4450 xdr_error:
4451         dprintk("%s: xdr returned %d!\n", __func__, -status);
4452         return status;
4453 }
4454 
4455 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4456 {
4457         unsigned int savep;
4458         uint32_t attrlen, bitmap[3] = {0};
4459         int status;
4460 
4461         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4462                 goto xdr_error;
4463         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4464                 goto xdr_error;
4465         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4466                 goto xdr_error;
4467 
4468         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4469                 goto xdr_error;
4470         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4471                 goto xdr_error;
4472 
4473         status = verify_attr_len(xdr, savep, attrlen);
4474 xdr_error:
4475         dprintk("%s: xdr returned %d!\n", __func__, -status);
4476         return status;
4477 }
4478 
4479 static int decode_threshold_hint(struct xdr_stream *xdr,
4480                                   uint32_t *bitmap,
4481                                   uint64_t *res,
4482                                   uint32_t hint_bit)
4483 {
4484         __be32 *p;
4485 
4486         *res = 0;
4487         if (likely(bitmap[0] & hint_bit)) {
4488                 p = xdr_inline_decode(xdr, 8);
4489                 if (unlikely(!p))
4490                         goto out_overflow;
4491                 xdr_decode_hyper(p, res);
4492         }
4493         return 0;
4494 out_overflow:
4495         print_overflow_msg(__func__, xdr);
4496         return -EIO;
4497 }
4498 
4499 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4500                                         struct nfs4_threshold *res)
4501 {
4502         __be32 *p;
4503         unsigned int savep;
4504         uint32_t bitmap[3] = {0,}, attrlen;
4505         int status;
4506 
4507         /* layout type */
4508         p = xdr_inline_decode(xdr, 4);
4509         if (unlikely(!p)) {
4510                 print_overflow_msg(__func__, xdr);
4511                 return -EIO;
4512         }
4513         res->l_type = be32_to_cpup(p);
4514 
4515         /* thi_hintset bitmap */
4516         status = decode_attr_bitmap(xdr, bitmap);
4517         if (status < 0)
4518                 goto xdr_error;
4519 
4520         /* thi_hintlist length */
4521         status = decode_attr_length(xdr, &attrlen, &savep);
4522         if (status < 0)
4523                 goto xdr_error;
4524         /* thi_hintlist */
4525         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4526         if (status < 0)
4527                 goto xdr_error;
4528         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4529         if (status < 0)
4530                 goto xdr_error;
4531         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4532                                        THRESHOLD_RD_IO);
4533         if (status < 0)
4534                 goto xdr_error;
4535         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4536                                        THRESHOLD_WR_IO);
4537         if (status < 0)
4538                 goto xdr_error;
4539 
4540         status = verify_attr_len(xdr, savep, attrlen);
4541         res->bm = bitmap[0];
4542 
4543         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4544                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4545                 res->wr_io_sz);
4546 xdr_error:
4547         dprintk("%s ret=%d!\n", __func__, status);
4548         return status;
4549 }
4550 
4551 /*
4552  * Thresholds on pNFS direct I/O vrs MDS I/O
4553  */
4554 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4555                                     uint32_t *bitmap,
4556                                     struct nfs4_threshold *res)
4557 {
4558         __be32 *p;
4559         int status = 0;
4560         uint32_t num;
4561 
4562         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4563                 return -EIO;
4564         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4565                 /* Did the server return an unrequested attribute? */
4566                 if (unlikely(res == NULL))
4567                         return -EREMOTEIO;
4568                 p = xdr_inline_decode(xdr, 4);
4569                 if (unlikely(!p))
4570                         goto out_overflow;
4571                 num = be32_to_cpup(p);
4572                 if (num == 0)
4573                         return 0;
4574                 if (num > 1)
4575                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4576                                 "drivers per filesystem not supported\n",
4577                                 __func__);
4578 
4579                 status = decode_first_threshold_item4(xdr, res);
4580                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4581         }
4582         return status;
4583 out_overflow:
4584         print_overflow_msg(__func__, xdr);
4585         return -EIO;
4586 }
4587 
4588 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4589                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4590                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4591                 const struct nfs_server *server)
4592 {
4593         int status;
4594         umode_t fmode = 0;
4595         uint32_t type;
4596         int32_t err;
4597 
4598         status = decode_attr_type(xdr, bitmap, &type);
4599         if (status < 0)
4600                 goto xdr_error;
4601         fattr->mode = 0;
4602         if (status != 0) {
4603                 fattr->mode |= nfs_type2fmt[type];
4604                 fattr->valid |= status;
4605         }
4606 
4607         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4608         if (status < 0)
4609                 goto xdr_error;
4610         fattr->valid |= status;
4611 
4612         status = decode_attr_size(xdr, bitmap, &fattr->size);
4613         if (status < 0)
4614                 goto xdr_error;
4615         fattr->valid |= status;
4616 
4617         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4618         if (status < 0)
4619                 goto xdr_error;
4620         fattr->valid |= status;
4621 
4622         err = 0;
4623         status = decode_attr_error(xdr, bitmap, &err);
4624         if (status < 0)
4625                 goto xdr_error;
4626 
4627         status = decode_attr_filehandle(xdr, bitmap, fh);
4628         if (status < 0)
4629                 goto xdr_error;
4630 
4631         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4632         if (status < 0)
4633                 goto xdr_error;
4634         fattr->valid |= status;
4635 
4636         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4637         if (status < 0)
4638                 goto xdr_error;
4639         fattr->valid |= status;
4640 
4641         status = -EIO;
4642         if (unlikely(bitmap[0]))
4643                 goto xdr_error;
4644 
4645         status = decode_attr_mode(xdr, bitmap, &fmode);
4646         if (status < 0)
4647                 goto xdr_error;
4648         if (status != 0) {
4649                 fattr->mode |= fmode;
4650                 fattr->valid |= status;
4651         }
4652 
4653         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4654         if (status < 0)
4655                 goto xdr_error;
4656         fattr->valid |= status;
4657 
4658         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4659         if (status < 0)
4660                 goto xdr_error;
4661         fattr->valid |= status;
4662 
4663         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4664         if (status < 0)
4665                 goto xdr_error;
4666         fattr->valid |= status;
4667 
4668         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4669         if (status < 0)
4670                 goto xdr_error;
4671         fattr->valid |= status;
4672 
4673         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4674         if (status < 0)
4675                 goto xdr_error;
4676         fattr->valid |= status;
4677 
4678         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4679         if (status < 0)
4680                 goto xdr_error;
4681         fattr->valid |= status;
4682 
4683         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4684         if (status < 0)
4685                 goto xdr_error;
4686         fattr->valid |= status;
4687 
4688         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4689         if (status < 0)
4690                 goto xdr_error;
4691         fattr->valid |= status;
4692 
4693         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4694         if (status < 0)
4695                 goto xdr_error;
4696         fattr->valid |= status;
4697 
4698         status = -EIO;
4699         if (unlikely(bitmap[1]))
4700                 goto xdr_error;
4701 
4702         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4703         if (status < 0)
4704                 goto xdr_error;
4705 
4706         if (label) {
4707                 status = decode_attr_security_label(xdr, bitmap, label);
4708                 if (status < 0)
4709                         goto xdr_error;
4710                 fattr->valid |= status;
4711         }
4712 
4713 xdr_error:
4714         dprintk("%s: xdr returned %d\n", __func__, -status);
4715         return status;
4716 }
4717 
4718 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4719                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4720                 struct nfs4_label *label, const struct nfs_server *server)
4721 {
4722         unsigned int savep;
4723         uint32_t attrlen,
4724                  bitmap[3] = {0};
4725         int status;
4726 
4727         status = decode_op_hdr(xdr, OP_GETATTR);
4728         if (status < 0)
4729                 goto xdr_error;
4730 
4731         status = decode_attr_bitmap(xdr, bitmap);
4732         if (status < 0)
4733                 goto xdr_error;
4734 
4735         status = decode_attr_length(xdr, &attrlen, &savep);
4736         if (status < 0)
4737                 goto xdr_error;
4738 
4739         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4740                                         label, server);
4741         if (status < 0)
4742                 goto xdr_error;
4743 
4744         status = verify_attr_len(xdr, savep, attrlen);
4745 xdr_error:
4746         dprintk("%s: xdr returned %d\n", __func__, -status);
4747         return status;
4748 }
4749 
4750 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4751                 struct nfs4_label *label, const struct nfs_server *server)
4752 {
4753         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4754 }
4755 
4756 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4757                 const struct nfs_server *server)
4758 {
4759         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4760 }
4761 
4762 /*
4763  * Decode potentially multiple layout types.
4764  */
4765 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4766                                     struct nfs_fsinfo *fsinfo)
4767 {
4768         __be32 *p;
4769         uint32_t i;
4770 
4771         p = xdr_inline_decode(xdr, 4);
4772         if (unlikely(!p))
4773                 goto out_overflow;
4774         fsinfo->nlayouttypes = be32_to_cpup(p);
4775 
4776         /* pNFS is not supported by the underlying file system */
4777         if (fsinfo->nlayouttypes == 0)
4778                 return 0;
4779 
4780         /* Decode and set first layout type, move xdr->p past unused types */
4781         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4782         if (unlikely(!p))
4783                 goto out_overflow;
4784 
4785         /* If we get too many, then just cap it at the max */
4786         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4787                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4788                         __func__, fsinfo->nlayouttypes);
4789                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4790         }
4791 
4792         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4793                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4794         return 0;
4795 out_overflow:
4796         print_overflow_msg(__func__, xdr);
4797         return -EIO;
4798 }
4799 
4800 /*
4801  * The type of file system exported.
4802  * Note we must ensure that layouttype is set in any non-error case.
4803  */
4804 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4805                                 struct nfs_fsinfo *fsinfo)
4806 {
4807         int status = 0;
4808 
4809         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4810         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4811                 return -EIO;
4812         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4813                 status = decode_pnfs_layout_types(xdr, fsinfo);
4814                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4815         }
4816         return status;
4817 }
4818 
4819 /*
4820  * The prefered block size for layout directed io
4821  */
4822 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4823                                       uint32_t *res)
4824 {
4825         __be32 *p;
4826 
4827         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4828         *res = 0;
4829         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4830                 p = xdr_inline_decode(xdr, 4);
4831                 if (unlikely(!p)) {
4832                         print_overflow_msg(__func__, xdr);
4833                         return -EIO;
4834                 }
4835                 *res = be32_to_cpup(p);
4836                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4837         }
4838         return 0;
4839 }
4840 
4841 /*
4842  * The granularity of a CLONE operation.
4843  */
4844 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4845                                      uint32_t *res)
4846 {
4847         __be32 *p;
4848 
4849         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4850         *res = 0;
4851         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4852                 p = xdr_inline_decode(xdr, 4);
4853                 if (unlikely(!p)) {
4854                         print_overflow_msg(__func__, xdr);
4855                         return -EIO;
4856                 }
4857                 *res = be32_to_cpup(p);
4858                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4859         }
4860         return 0;
4861 }
4862 
4863 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4864 {
4865         unsigned int savep;
4866         uint32_t attrlen, bitmap[3];
4867         int status;
4868 
4869         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4870                 goto xdr_error;
4871         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4872                 goto xdr_error;
4873         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4874                 goto xdr_error;
4875 
4876         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4877 
4878         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4879                 goto xdr_error;
4880         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4881                 goto xdr_error;
4882         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4883                 goto xdr_error;
4884         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4885         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4886                 goto xdr_error;
4887         fsinfo->wtpref = fsinfo->wtmax;
4888 
4889         status = -EIO;
4890         if (unlikely(bitmap[0]))
4891                 goto xdr_error;
4892 
4893         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4894         if (status != 0)
4895                 goto xdr_error;
4896         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4897         if (status != 0)
4898                 goto xdr_error;
4899 
4900         status = -EIO;
4901         if (unlikely(bitmap[1]))
4902                 goto xdr_error;
4903 
4904         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4905         if (status)
4906                 goto xdr_error;
4907         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4908         if (status)
4909                 goto xdr_error;
4910 
4911         status = verify_attr_len(xdr, savep, attrlen);
4912 xdr_error:
4913         dprintk("%s: xdr returned %d!\n", __func__, -status);
4914         return status;
4915 }
4916 
4917 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4918 {
4919         __be32 *p;
4920         uint32_t len;
4921         int status;
4922 
4923         /* Zero handle first to allow comparisons */
4924         memset(fh, 0, sizeof(*fh));
4925 
4926         status = decode_op_hdr(xdr, OP_GETFH);
4927         if (status)
4928                 return status;
4929 
4930         p = xdr_inline_decode(xdr, 4);
4931         if (unlikely(!p))
4932                 goto out_overflow;
4933         len = be32_to_cpup(p);
4934         if (len > NFS4_FHSIZE)
4935                 return -EIO;
4936         fh->size = len;
4937         p = xdr_inline_decode(xdr, len);
4938         if (unlikely(!p))
4939                 goto out_overflow;
4940         memcpy(fh->data, p, len);
4941         return 0;
4942 out_overflow:
4943         print_overflow_msg(__func__, xdr);
4944         return -EIO;
4945 }
4946 
4947 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4948 {
4949         int status;
4950 
4951         status = decode_op_hdr(xdr, OP_LINK);
4952         if (status)
4953                 return status;
4954         return decode_change_info(xdr, cinfo);
4955 }
4956 
4957 /*
4958  * We create the owner, so we know a proper owner.id length is 4.
4959  */
4960 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4961 {
4962         uint64_t offset, length, clientid;
4963         __be32 *p;
4964         uint32_t namelen, type;
4965 
4966         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4967         if (unlikely(!p))
4968                 goto out_overflow;
4969         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4970         p = xdr_decode_hyper(p, &length);
4971         type = be32_to_cpup(p++); /* 4 byte read */
4972         if (fl != NULL) { /* manipulate file lock */
4973                 fl->fl_start = (loff_t)offset;
4974                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4975                 if (length == ~(uint64_t)0)
4976                         fl->fl_end = OFFSET_MAX;
4977                 fl->fl_type = F_WRLCK;
4978                 if (type & 1)
4979                         fl->fl_type = F_RDLCK;
4980                 fl->fl_pid = 0;
4981         }
4982         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4983         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4984         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4985         if (likely(p))
4986                 return -NFS4ERR_DENIED;
4987 out_overflow:
4988         print_overflow_msg(__func__, xdr);
4989         return -EIO;
4990 }
4991 
4992 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4993 {
4994         int status;
4995 
4996         status = decode_op_hdr(xdr, OP_LOCK);
4997         if (status == -EIO)
4998                 goto out;
4999         if (status == 0) {
5000                 status = decode_lock_stateid(xdr, &res->stateid);
5001                 if (unlikely(status))
5002                         goto out;
5003         } else if (status == -NFS4ERR_DENIED)
5004                 status = decode_lock_denied(xdr, NULL);
5005         if (res->open_seqid != NULL)
5006                 nfs_increment_open_seqid(status, res->open_seqid);
5007         nfs_increment_lock_seqid(status, res->lock_seqid);
5008 out:
5009         return status;
5010 }
5011 
5012 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5013 {
5014         int status;
5015         status = decode_op_hdr(xdr, OP_LOCKT);
5016         if (status == -NFS4ERR_DENIED)
5017                 return decode_lock_denied(xdr, res->denied);
5018         return status;
5019 }
5020 
5021 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5022 {
5023         int status;
5024 
5025         status = decode_op_hdr(xdr, OP_LOCKU);
5026         if (status != -EIO)
5027                 nfs_increment_lock_seqid(status, res->seqid);
5028         if (status == 0)
5029                 status = decode_lock_stateid(xdr, &res->stateid);
5030         return status;
5031 }
5032 
5033 static int decode_release_lockowner(struct xdr_stream *xdr)
5034 {
5035         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5036 }
5037 
5038 static int decode_lookup(struct xdr_stream *xdr)
5039 {
5040         return decode_op_hdr(xdr, OP_LOOKUP);
5041 }
5042 
5043 /* This is too sick! */
5044 static int decode_space_limit(struct xdr_stream *xdr,
5045                 unsigned long *pagemod_limit)
5046 {
5047         __be32 *p;
5048         uint32_t limit_type, nblocks, blocksize;
5049         u64 maxsize = 0;
5050 
5051         p = xdr_inline_decode(xdr, 12);
5052         if (unlikely(!p))
5053                 goto out_overflow;
5054         limit_type = be32_to_cpup(p++);
5055         switch (limit_type) {
5056         case NFS4_LIMIT_SIZE:
5057                 xdr_decode_hyper(p, &maxsize);
5058                 break;
5059         case NFS4_LIMIT_BLOCKS:
5060                 nblocks = be32_to_cpup(p++);
5061                 blocksize = be32_to_cpup(p);
5062                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5063         }
5064         maxsize >>= PAGE_SHIFT;
5065         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5066         return 0;
5067 out_overflow:
5068         print_overflow_msg(__func__, xdr);
5069         return -EIO;
5070 }
5071 
5072 static int decode_rw_delegation(struct xdr_stream *xdr,
5073                 uint32_t delegation_type,
5074                 struct nfs_openres *res)
5075 {
5076         __be32 *p;
5077         int status;
5078 
5079         status = decode_delegation_stateid(xdr, &res->delegation);
5080         if (unlikely(status))
5081                 return status;
5082         p = xdr_inline_decode(xdr, 4);
5083         if (unlikely(!p))
5084                 goto out_overflow;
5085         res->do_recall = be32_to_cpup(p);
5086 
5087         switch (delegation_type) {
5088         case NFS4_OPEN_DELEGATE_READ:
5089                 res->delegation_type = FMODE_READ;
5090                 break;
5091         case NFS4_OPEN_DELEGATE_WRITE:
5092                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5093                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5094                                 return -EIO;
5095         }
5096         return decode_ace(xdr, NULL, res->server->nfs_client);
5097 out_overflow:
5098         print_overflow_msg(__func__, xdr);
5099         return -EIO;
5100 }
5101 
5102 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5103 {
5104         __be32 *p;
5105         uint32_t why_no_delegation;
5106 
5107         p = xdr_inline_decode(xdr, 4);
5108         if (unlikely(!p))
5109                 goto out_overflow;
5110         why_no_delegation = be32_to_cpup(p);
5111         switch (why_no_delegation) {
5112                 case WND4_CONTENTION:
5113                 case WND4_RESOURCE:
5114                         xdr_inline_decode(xdr, 4);
5115                         /* Ignore for now */
5116         }
5117         return 0;
5118 out_overflow:
5119         print_overflow_msg(__func__, xdr);
5120         return -EIO;
5121 }
5122 
5123 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5124 {
5125         __be32 *p;
5126         uint32_t delegation_type;
5127 
5128         p = xdr_inline_decode(xdr, 4);
5129         if (unlikely(!p))
5130                 goto out_overflow;
5131         delegation_type = be32_to_cpup(p);
5132         res->delegation_type = 0;
5133         switch (delegation_type) {
5134         case NFS4_OPEN_DELEGATE_NONE:
5135                 return 0;
5136         case NFS4_OPEN_DELEGATE_READ:
5137         case NFS4_OPEN_DELEGATE_WRITE:
5138                 return decode_rw_delegation(xdr, delegation_type, res);
5139         case NFS4_OPEN_DELEGATE_NONE_EXT:
5140                 return decode_no_delegation(xdr, res);
5141         }
5142         return -EIO;
5143 out_overflow:
5144         print_overflow_msg(__func__, xdr);
5145         return -EIO;
5146 }
5147 
5148 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5149 {
5150         __be32 *p;
5151         uint32_t savewords, bmlen, i;
5152         int status;
5153 
5154         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5155                 return status;
5156         nfs_increment_open_seqid(status, res->seqid);
5157         if (status)
5158                 return status;
5159         status = decode_open_stateid(xdr, &res->stateid);
5160         if (unlikely(status))
5161                 return status;
5162 
5163         decode_change_info(xdr, &res->cinfo);
5164 
5165         p = xdr_inline_decode(xdr, 8);
5166         if (unlikely(!p))
5167                 goto out_overflow;
5168         res->rflags = be32_to_cpup(p++);
5169         bmlen = be32_to_cpup(p);
5170         if (bmlen > 10)
5171                 goto xdr_error;
5172 
5173         p = xdr_inline_decode(xdr, bmlen << 2);
5174         if (unlikely(!p))
5175                 goto out_overflow;
5176         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5177         for (i = 0; i < savewords; ++i)
5178                 res->attrset[i] = be32_to_cpup(p++);
5179         for (; i < NFS4_BITMAP_SIZE; i++)
5180                 res->attrset[i] = 0;
5181 
5182         return decode_delegation(xdr, res);
5183 xdr_error:
5184         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5185         return -EIO;
5186 out_overflow:
5187         print_overflow_msg(__func__, xdr);
5188         return -EIO;
5189 }
5190 
5191 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5192 {
5193         int status;
5194 
5195         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5196         if (status != -EIO)
5197                 nfs_increment_open_seqid(status, res->seqid);
5198         if (!status)
5199                 status = decode_open_stateid(xdr, &res->stateid);
5200         return status;
5201 }
5202 
5203 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5204 {
5205         int status;
5206 
5207         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5208         if (status != -EIO)
5209                 nfs_increment_open_seqid(status, res->seqid);
5210         if (!status)
5211                 status = decode_open_stateid(xdr, &res->stateid);
5212         return status;
5213 }
5214 
5215 static int decode_putfh(struct xdr_stream *xdr)
5216 {
5217         return decode_op_hdr(xdr, OP_PUTFH);
5218 }
5219 
5220 static int decode_putrootfh(struct xdr_stream *xdr)
5221 {
5222         return decode_op_hdr(xdr, OP_PUTROOTFH);
5223 }
5224 
5225 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5226                        struct nfs_pgio_res *res)
5227 {
5228         __be32 *p;
5229         uint32_t count, eof, recvd;
5230         int status;
5231 
5232         status = decode_op_hdr(xdr, OP_READ);
5233         if (status)
5234                 return status;
5235         p = xdr_inline_decode(xdr, 8);
5236         if (unlikely(!p))
5237                 goto out_overflow;
5238         eof = be32_to_cpup(p++);
5239         count = be32_to_cpup(p);
5240         recvd = xdr_read_pages(xdr, count);
5241         if (count > recvd) {
5242                 dprintk("NFS: server cheating in read reply: "
5243                                 "count %u > recvd %u\n", count, recvd);
5244                 count = recvd;
5245                 eof = 0;
5246         }
5247         res->eof = eof;
5248         res->count = count;
5249         return 0;
5250 out_overflow:
5251         print_overflow_msg(__func__, xdr);
5252         return -EIO;
5253 }
5254 
5255 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5256 {
5257         int             status;
5258         __be32          verf[2];
5259 
5260         status = decode_op_hdr(xdr, OP_READDIR);
5261         if (!status)
5262                 status = decode_verifier(xdr, readdir->verifier.data);
5263         if (unlikely(status))
5264                 return status;
5265         memcpy(verf, readdir->verifier.data, sizeof(verf));
5266         dprintk("%s: verifier = %08x:%08x\n",
5267                         __func__, verf[0], verf[1]);
5268         return xdr_read_pages(xdr, xdr->buf->page_len);
5269 }
5270 
5271 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5272 {
5273         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5274         u32 len, recvd;
5275         __be32 *p;
5276         int status;
5277 
5278         status = decode_op_hdr(xdr, OP_READLINK);
5279         if (status)
5280                 return status;
5281 
5282         /* Convert length of symlink */
5283         p = xdr_inline_decode(xdr, 4);
5284         if (unlikely(!p))
5285                 goto out_overflow;
5286         len = be32_to_cpup(p);
5287         if (len >= rcvbuf->page_len || len <= 0) {
5288                 dprintk("nfs: server returned giant symlink!\n");
5289                 return -ENAMETOOLONG;
5290         }
5291         recvd = xdr_read_pages(xdr, len);
5292         if (recvd < len) {
5293                 dprintk("NFS: server cheating in readlink reply: "
5294                                 "count %u > recvd %u\n", len, recvd);
5295                 return -EIO;
5296         }
5297         /*
5298          * The XDR encode routine has set things up so that
5299          * the link text will be copied directly into the
5300          * buffer.  We just have to do overflow-checking,
5301          * and and null-terminate the text (the VFS expects
5302          * null-termination).
5303          */
5304         xdr_terminate_string(rcvbuf, len);
5305         return 0;
5306 out_overflow:
5307         print_overflow_msg(__func__, xdr);
5308         return -EIO;
5309 }
5310 
5311 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5312 {
5313         int status;
5314 
5315         status = decode_op_hdr(xdr, OP_REMOVE);
5316         if (status)
5317                 goto out;
5318         status = decode_change_info(xdr, cinfo);
5319 out:
5320         return status;
5321 }
5322 
5323 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5324               struct nfs4_change_info *new_cinfo)
5325 {
5326         int status;
5327 
5328         status = decode_op_hdr(xdr, OP_RENAME);
5329         if (status)
5330                 goto out;
5331         if ((status = decode_change_info(xdr, old_cinfo)))
5332                 goto out;
5333         status = decode_change_info(xdr, new_cinfo);
5334 out:
5335         return status;
5336 }
5337 
5338 static int decode_renew(struct xdr_stream *xdr)
5339 {
5340         return decode_op_hdr(xdr, OP_RENEW);
5341 }
5342 
5343 static int
5344 decode_restorefh(struct xdr_stream *xdr)
5345 {
5346         return decode_op_hdr(xdr, OP_RESTOREFH);
5347 }
5348 
5349 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5350                          struct nfs_getaclres *res)
5351 {
5352         unsigned int savep;
5353         uint32_t attrlen,
5354                  bitmap[3] = {0};
5355         int status;
5356         unsigned int pg_offset;
5357 
5358         res->acl_len = 0;
5359         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5360                 goto out;
5361 
5362         xdr_enter_page(xdr, xdr->buf->page_len);
5363 
5364         /* Calculate the offset of the page data */
5365         pg_offset = xdr->buf->head[0].iov_len;
5366 
5367         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5368                 goto out;
5369         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5370                 goto out;
5371 
5372         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5373                 return -EIO;
5374         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5375 
5376                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5377                  * are stored with the acl data to handle the problem of
5378                  * variable length bitmaps.*/
5379                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5380                 res->acl_len = attrlen;
5381 
5382                 /* Check for receive buffer overflow */
5383                 if (res->acl_len > (xdr->nwords << 2) ||
5384                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5385                         res->acl_flags |= NFS4_ACL_TRUNC;
5386                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5387                                         attrlen, xdr->nwords << 2);
5388                 }
5389         } else
5390                 status = -EOPNOTSUPP;
5391 
5392 out:
5393         return status;
5394 }
5395 
5396 static int
5397 decode_savefh(struct xdr_stream *xdr)
5398 {
5399         return decode_op_hdr(xdr, OP_SAVEFH);
5400 }
5401 
5402 static int decode_setattr(struct xdr_stream *xdr)
5403 {
5404         __be32 *p;
5405         uint32_t bmlen;
5406         int status;
5407 
5408         status = decode_op_hdr(xdr, OP_SETATTR);
5409         if (status)
5410                 return status;
5411         p = xdr_inline_decode(xdr, 4);
5412         if (unlikely(!p))
5413                 goto out_overflow;
5414         bmlen = be32_to_cpup(p);
5415         p = xdr_inline_decode(xdr, bmlen << 2);
5416         if (likely(p))
5417                 return 0;
5418 out_overflow:
5419         print_overflow_msg(__func__, xdr);
5420         return -EIO;
5421 }
5422 
5423 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5424 {
5425         __be32 *p;
5426         uint32_t opnum;
5427         int32_t nfserr;
5428 
5429         p = xdr_inline_decode(xdr, 8);
5430         if (unlikely(!p))
5431                 goto out_overflow;
5432         opnum = be32_to_cpup(p++);
5433         if (opnum != OP_SETCLIENTID) {
5434                 dprintk("nfs: decode_setclientid: Server returned operation"
5435                         " %d\n", opnum);
5436                 return -EIO;
5437         }
5438         nfserr = be32_to_cpup(p);
5439         if (nfserr == NFS_OK) {
5440                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5441                 if (unlikely(!p))
5442                         goto out_overflow;
5443                 p = xdr_decode_hyper(p, &res->clientid);
5444                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5445         } else if (nfserr == NFSERR_CLID_INUSE) {
5446                 uint32_t len;
5447 
5448                 /* skip netid string */
5449                 p = xdr_inline_decode(xdr, 4);
5450                 if (unlikely(!p))
5451                         goto out_overflow;
5452                 len = be32_to_cpup(p);
5453                 p = xdr_inline_decode(xdr, len);
5454                 if (unlikely(!p))
5455                         goto out_overflow;
5456 
5457                 /* skip uaddr string */
5458                 p = xdr_inline_decode(xdr, 4);
5459                 if (unlikely(!p))
5460                         goto out_overflow;
5461                 len = be32_to_cpup(p);
5462                 p = xdr_inline_decode(xdr, len);
5463                 if (unlikely(!p))
5464                         goto out_overflow;
5465                 return -NFSERR_CLID_INUSE;
5466         } else
5467                 return nfs4_stat_to_errno(nfserr);
5468 
5469         return 0;
5470 out_overflow:
5471         print_overflow_msg(__func__, xdr);
5472         return -EIO;
5473 }
5474 
5475 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5476 {
5477         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5478 }
5479 
5480 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5481 {
5482         __be32 *p;
5483         int status;
5484 
5485         status = decode_op_hdr(xdr, OP_WRITE);
5486         if (status)
5487                 return status;
5488 
5489         p = xdr_inline_decode(xdr, 8);
5490         if (unlikely(!p))
5491                 goto out_overflow;
5492         res->count = be32_to_cpup(p++);
5493         res->verf->committed = be32_to_cpup(p++);
5494         return decode_write_verifier(xdr, &res->verf->verifier);
5495 out_overflow:
5496         print_overflow_msg(__func__, xdr);
5497         return -EIO;
5498 }
5499 
5500 static int decode_delegreturn(struct xdr_stream *xdr)
5501 {
5502         return decode_op_hdr(xdr, OP_DELEGRETURN);
5503 }
5504 
5505 static int decode_secinfo_gss(struct xdr_stream *xdr,
5506                               struct nfs4_secinfo4 *flavor)
5507 {
5508         u32 oid_len;
5509         __be32 *p;
5510 
5511         p = xdr_inline_decode(xdr, 4);
5512         if (unlikely(!p))
5513                 goto out_overflow;
5514         oid_len = be32_to_cpup(p);
5515         if (oid_len > GSS_OID_MAX_LEN)
5516                 goto out_err;
5517 
5518         p = xdr_inline_decode(xdr, oid_len);
5519         if (unlikely(!p))
5520                 goto out_overflow;
5521         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5522         flavor->flavor_info.oid.len = oid_len;
5523 
5524         p = xdr_inline_decode(xdr, 8);
5525         if (unlikely(!p))
5526                 goto out_overflow;
5527         flavor->flavor_info.qop = be32_to_cpup(p++);
5528         flavor->flavor_info.service = be32_to_cpup(p);
5529 
5530         return 0;
5531 
5532 out_overflow:
5533         print_overflow_msg(__func__, xdr);
5534         return -EIO;
5535 out_err:
5536         return -EINVAL;
5537 }
5538 
5539 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5540 {
5541         struct nfs4_secinfo4 *sec_flavor;
5542         unsigned int i, num_flavors;
5543         int status;
5544         __be32 *p;
5545 
5546         p = xdr_inline_decode(xdr, 4);
5547         if (unlikely(!p))
5548                 goto out_overflow;
5549 
5550         res->flavors->num_flavors = 0;
5551         num_flavors = be32_to_cpup(p);
5552 
5553         for (i = 0; i < num_flavors; i++) {
5554                 sec_flavor = &res->flavors->flavors[i];
5555                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5556                         break;
5557 
5558                 p = xdr_inline_decode(xdr, 4);
5559                 if (unlikely(!p))
5560                         goto out_overflow;
5561                 sec_flavor->flavor = be32_to_cpup(p);
5562 
5563                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5564                         status = decode_secinfo_gss(xdr, sec_flavor);
5565                         if (status)
5566                                 goto out;
5567                 }
5568                 res->flavors->num_flavors++;
5569         }
5570 
5571         status = 0;
5572 out:
5573         return status;
5574 out_overflow:
5575         print_overflow_msg(__func__, xdr);
5576         return -EIO;
5577 }
5578 
5579 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5580 {
5581         int status = decode_op_hdr(xdr, OP_SECINFO);
5582         if (status)
5583                 return status;
5584         return decode_secinfo_common(xdr, res);
5585 }
5586 
5587 #if defined(CONFIG_NFS_V4_1)
5588 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5589 {
5590         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5591         if (status)
5592                 return status;
5593         return decode_secinfo_common(xdr, res);
5594 }
5595 
5596 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5597 {
5598         __be32 *p;
5599         uint32_t bitmap_words;
5600         unsigned int i;
5601 
5602         p = xdr_inline_decode(xdr, 4);
5603         bitmap_words = be32_to_cpup(p++);
5604         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5605                 return -EIO;
5606         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5607         for (i = 0; i < bitmap_words; i++)
5608                 op_map->u.words[i] = be32_to_cpup(p++);
5609 
5610         return 0;
5611 }
5612 
5613 static int decode_exchange_id(struct xdr_stream *xdr,
5614                               struct nfs41_exchange_id_res *res)
5615 {
5616         __be32 *p;
5617         uint32_t dummy;
5618         char *dummy_str;
5619         int status;
5620         uint32_t impl_id_count;
5621 
5622         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5623         if (status)
5624                 return status;
5625 
5626         p = xdr_inline_decode(xdr, 8);
5627         if (unlikely(!p))
5628                 goto out_overflow;
5629         xdr_decode_hyper(p, &res->clientid);
5630         p = xdr_inline_decode(xdr, 12);
5631         if (unlikely(!p))
5632                 goto out_overflow;
5633         res->seqid = be32_to_cpup(p++);
5634         res->flags = be32_to_cpup(p++);
5635 
5636         res->state_protect.how = be32_to_cpup(p);
5637         switch (res->state_protect.how) {
5638         case SP4_NONE:
5639                 break;
5640         case SP4_MACH_CRED:
5641                 status = decode_op_map(xdr, &res->state_protect.enforce);
5642                 if (status)
5643                         return status;
5644                 status = decode_op_map(xdr, &res->state_protect.allow);
5645                 if (status)
5646                         return status;
5647                 break;
5648         default:
5649                 WARN_ON_ONCE(1);
5650                 return -EIO;
5651         }
5652 
5653         /* server_owner4.so_minor_id */
5654         p = xdr_inline_decode(xdr, 8);
5655         if (unlikely(!p))
5656                 goto out_overflow;
5657         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5658 
5659         /* server_owner4.so_major_id */
5660         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661         if (unlikely(status))
5662                 return status;
5663         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5664                 return -EIO;
5665         memcpy(res->server_owner->major_id, dummy_str, dummy);
5666         res->server_owner->major_id_sz = dummy;
5667 
5668         /* server_scope4 */
5669         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5670         if (unlikely(status))
5671                 return status;
5672         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5673                 return -EIO;
5674         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5675         res->server_scope->server_scope_sz = dummy;
5676 
5677         /* Implementation Id */
5678         p = xdr_inline_decode(xdr, 4);
5679         if (unlikely(!p))
5680                 goto out_overflow;
5681         impl_id_count = be32_to_cpup(p++);
5682 
5683         if (impl_id_count) {
5684                 /* nii_domain */
5685                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5686                 if (unlikely(status))
5687                         return status;
5688                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5689                         return -EIO;
5690                 memcpy(res->impl_id->domain, dummy_str, dummy);
5691 
5692                 /* nii_name */
5693                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5694                 if (unlikely(status))
5695                         return status;
5696                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5697                         return -EIO;
5698                 memcpy(res->impl_id->name, dummy_str, dummy);
5699 
5700                 /* nii_date */
5701                 p = xdr_inline_decode(xdr, 12);
5702                 if (unlikely(!p))
5703                         goto out_overflow;
5704                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5705                 res->impl_id->date.nseconds = be32_to_cpup(p);
5706 
5707                 /* if there's more than one entry, ignore the rest */
5708         }
5709         return 0;
5710 out_overflow:
5711         print_overflow_msg(__func__, xdr);
5712         return -EIO;
5713 }
5714 
5715 static int decode_chan_attrs(struct xdr_stream *xdr,
5716                              struct nfs4_channel_attrs *attrs)
5717 {
5718         __be32 *p;
5719         u32 nr_attrs, val;
5720 
5721         p = xdr_inline_decode(xdr, 28);
5722         if (unlikely(!p))
5723                 goto out_overflow;
5724         val = be32_to_cpup(p++);        /* headerpadsz */
5725         if (val)
5726                 return -EINVAL;         /* no support for header padding yet */
5727         attrs->max_rqst_sz = be32_to_cpup(p++);
5728         attrs->max_resp_sz = be32_to_cpup(p++);
5729         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5730         attrs->max_ops = be32_to_cpup(p++);
5731         attrs->max_reqs = be32_to_cpup(p++);
5732         nr_attrs = be32_to_cpup(p);
5733         if (unlikely(nr_attrs > 1)) {
5734                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5735                         "count %u\n", __func__, nr_attrs);
5736                 return -EINVAL;
5737         }
5738         if (nr_attrs == 1) {
5739                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5740                 if (unlikely(!p))
5741                         goto out_overflow;
5742         }
5743         return 0;
5744 out_overflow:
5745         print_overflow_msg(__func__, xdr);
5746         return -EIO;
5747 }
5748 
5749 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5750 {
5751         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5752 }
5753 
5754 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5755                                 struct nfs41_bind_conn_to_session_res *res)
5756 {
5757         __be32 *p;
5758         int status;
5759 
5760         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5761         if (!status)
5762                 status = decode_sessionid(xdr, &res->sessionid);
5763         if (unlikely(status))
5764                 return status;
5765 
5766         /* dir flags, rdma mode bool */
5767         p = xdr_inline_decode(xdr, 8);
5768         if (unlikely(!p))
5769                 goto out_overflow;
5770 
5771         res->dir = be32_to_cpup(p++);
5772         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5773                 return -EIO;
5774         if (be32_to_cpup(p) == 0)
5775                 res->use_conn_in_rdma_mode = false;
5776         else
5777                 res->use_conn_in_rdma_mode = true;
5778 
5779         return 0;
5780 out_overflow:
5781         print_overflow_msg(__func__, xdr);
5782         return -EIO;
5783 }
5784 
5785 static int decode_create_session(struct xdr_stream *xdr,
5786                                  struct nfs41_create_session_res *res)
5787 {
5788         __be32 *p;
5789         int status;
5790 
5791         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5792         if (!status)
5793                 status = decode_sessionid(xdr, &res->sessionid);
5794         if (unlikely(status))
5795                 return status;
5796 
5797         /* seqid, flags */
5798         p = xdr_inline_decode(xdr, 8);
5799         if (unlikely(!p))
5800                 goto out_overflow;
5801         res->seqid = be32_to_cpup(p++);
5802         res->flags = be32_to_cpup(p);
5803 
5804         /* Channel attributes */
5805         status = decode_chan_attrs(xdr, &res->fc_attrs);
5806         if (!status)
5807                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5808         return status;
5809 out_overflow:
5810         print_overflow_msg(__func__, xdr);
5811         return -EIO;
5812 }
5813 
5814 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5815 {
5816         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5817 }
5818 
5819 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5820 {
5821         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5822 }
5823 
5824 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5825 {
5826         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5827 }
5828 #endif /* CONFIG_NFS_V4_1 */
5829 
5830 static int decode_sequence(struct xdr_stream *xdr,
5831                            struct nfs4_sequence_res *res,
5832                            struct rpc_rqst *rqstp)
5833 {
5834 #if defined(CONFIG_NFS_V4_1)
5835         struct nfs4_session *session;
5836         struct nfs4_sessionid id;
5837         u32 dummy;
5838         int status;
5839         __be32 *p;
5840 
5841         if (res->sr_slot == NULL)
5842                 return 0;
5843         if (!res->sr_slot->table->session)
5844                 return 0;
5845 
5846         status = decode_op_hdr(xdr, OP_SEQUENCE);
5847         if (!status)
5848                 status = decode_sessionid(xdr, &id);
5849         if (unlikely(status))
5850                 goto out_err;
5851 
5852         /*
5853          * If the server returns different values for sessionID, slotID or
5854          * sequence number, the server is looney tunes.
5855          */
5856         status = -EREMOTEIO;
5857         session = res->sr_slot->table->session;
5858 
5859         if (memcmp(id.data, session->sess_id.data,
5860                    NFS4_MAX_SESSIONID_LEN)) {
5861                 dprintk("%s Invalid session id\n", __func__);
5862                 goto out_err;
5863         }
5864 
5865         p = xdr_inline_decode(xdr, 20);
5866         if (unlikely(!p))
5867                 goto out_overflow;
5868 
5869         /* seqid */
5870         dummy = be32_to_cpup(p++);
5871         if (dummy != res->sr_slot->seq_nr) {
5872                 dprintk("%s Invalid sequence number\n", __func__);
5873                 goto out_err;
5874         }
5875         /* slot id */
5876         dummy = be32_to_cpup(p++);
5877         if (dummy != res->sr_slot->slot_nr) {
5878                 dprintk("%s Invalid slot id\n", __func__);
5879                 goto out_err;
5880         }
5881         /* highest slot id */
5882         res->sr_highest_slotid = be32_to_cpup(p++);
5883         /* target highest slot id */
5884         res->sr_target_highest_slotid = be32_to_cpup(p++);
5885         /* result flags */
5886         res->sr_status_flags = be32_to_cpup(p);
5887         status = 0;
5888 out_err:
5889         res->sr_status = status;
5890         return status;
5891 out_overflow:
5892         print_overflow_msg(__func__, xdr);
5893         status = -EIO;
5894         goto out_err;
5895 #else  /* CONFIG_NFS_V4_1 */
5896         return 0;
5897 #endif /* CONFIG_NFS_V4_1 */
5898 }
5899 
5900 #if defined(CONFIG_NFS_V4_1)
5901 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5902 {
5903         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5904         return decode_stateid(xdr, stateid);
5905 }
5906 
5907 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5908                                 struct nfs4_getdeviceinfo_res *res)
5909 {
5910         struct pnfs_device *pdev = res->pdev;
5911         __be32 *p;
5912         uint32_t len, type;
5913         int status;
5914 
5915         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5916         if (status) {
5917                 if (status == -ETOOSMALL) {
5918                         p = xdr_inline_decode(xdr, 4);
5919                         if (unlikely(!p))
5920                                 goto out_overflow;
5921                         pdev->mincount = be32_to_cpup(p);
5922                         dprintk("%s: Min count too small. mincnt = %u\n",
5923                                 __func__, pdev->mincount);
5924                 }
5925                 return status;
5926         }
5927 
5928         p = xdr_inline_decode(xdr, 8);
5929         if (unlikely(!p))
5930                 goto out_overflow;
5931         type = be32_to_cpup(p++);
5932         if (type != pdev->layout_type) {
5933                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5934                         __func__, pdev->layout_type, type);
5935                 return -EINVAL;
5936         }
5937         /*
5938          * Get the length of the opaque device_addr4. xdr_read_pages places
5939          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5940          * and places the remaining xdr data in xdr_buf->tail
5941          */
5942         pdev->mincount = be32_to_cpup(p);
5943         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5944                 goto out_overflow;
5945 
5946         /* Parse notification bitmap, verifying that it is zero. */
5947         p = xdr_inline_decode(xdr, 4);
5948         if (unlikely(!p))
5949                 goto out_overflow;
5950         len = be32_to_cpup(p);
5951         if (len) {
5952                 uint32_t i;
5953 
5954                 p = xdr_inline_decode(xdr, 4 * len);
5955                 if (unlikely(!p))
5956                         goto out_overflow;
5957 
5958                 res->notification = be32_to_cpup(p++);
5959                 for (i = 1; i < len; i++) {
5960                         if (be32_to_cpup(p++)) {
5961                                 dprintk("%s: unsupported notification\n",
5962                                         __func__);
5963                                 return -EIO;
5964                         }
5965                 }
5966         }
5967         return 0;
5968 out_overflow:
5969         print_overflow_msg(__func__, xdr);
5970         return -EIO;
5971 }
5972 
5973 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5974                             struct nfs4_layoutget_res *res)
5975 {
5976         __be32 *p;
5977         int status;
5978         u32 layout_count;
5979         u32 recvd;
5980 
5981         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5982         if (status)
5983                 return status;
5984         p = xdr_inline_decode(xdr, 4);
5985         if (unlikely(!p))
5986                 goto out_overflow;
5987         res->return_on_close = be32_to_cpup(p);
5988         decode_layout_stateid(xdr, &res->stateid);
5989         p = xdr_inline_decode(xdr, 4);
5990         if (unlikely(!p))
5991                 goto out_overflow;
5992         layout_count = be32_to_cpup(p);
5993         if (!layout_count) {
5994                 dprintk("%s: server responded with empty layout array\n",
5995                         __func__);
5996                 return -EINVAL;
5997         }
5998 
5999         p = xdr_inline_decode(xdr, 28);
6000         if (unlikely(!p))
6001                 goto out_overflow;
6002         p = xdr_decode_hyper(p, &res->range.offset);
6003         p = xdr_decode_hyper(p, &res->range.length);
6004         res->range.iomode = be32_to_cpup(p++);
6005         res->type = be32_to_cpup(p++);
6006         res->layoutp->len = be32_to_cpup(p);