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

Version: ~ [ linux-4.20-rc2 ] ~ [ linux-4.19.1 ] ~ [ linux-4.18.18 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.80 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.136 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.163 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.125 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.60 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.31.14 ] ~ [ linux-2.6.30.10 ] ~ [ linux-2.6.29.6 ] ~ [ linux-2.6.28.10 ] ~ [ linux-2.6.27.62 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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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_lookupp_maxsz    (op_encode_hdr_maxsz)
163 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
164 #define encode_share_access_maxsz \
165                                 (2)
166 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
167 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
168 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
169 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
170                                 2 + encode_share_access_maxsz + 2 + \
171                                 open_owner_id_maxsz + \
172                                 encode_opentype_maxsz + \
173                                 encode_claim_null_maxsz)
174 #define decode_space_limit_maxsz        (3)
175 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
176 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
177                                 decode_space_limit_maxsz + \
178                                 decode_ace_maxsz)
179 #define decode_change_info_maxsz        (5)
180 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
181                                 decode_stateid_maxsz + \
182                                 decode_change_info_maxsz + 1 + \
183                                 nfs4_fattr_bitmap_maxsz + \
184                                 decode_delegation_maxsz)
185 #define encode_open_confirm_maxsz \
186                                 (op_encode_hdr_maxsz + \
187                                  encode_stateid_maxsz + 1)
188 #define decode_open_confirm_maxsz \
189                                 (op_decode_hdr_maxsz + \
190                                  decode_stateid_maxsz)
191 #define encode_open_downgrade_maxsz \
192                                 (op_encode_hdr_maxsz + \
193                                  encode_stateid_maxsz + 1 + \
194                                  encode_share_access_maxsz)
195 #define decode_open_downgrade_maxsz \
196                                 (op_decode_hdr_maxsz + \
197                                  decode_stateid_maxsz)
198 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
199                                  1 + encode_stateid_maxsz)
200 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
201                                  decode_stateid_maxsz)
202 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
203                                  encode_stateid_maxsz + \
204                                  encode_attrs_maxsz)
205 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
206                                  nfs4_fattr_bitmap_maxsz)
207 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
208                                  encode_stateid_maxsz + 3)
209 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
210 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
211                                  2 + encode_verifier_maxsz + 5 + \
212                                 nfs4_label_maxsz)
213 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
214                                  decode_verifier_maxsz)
215 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
216 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
217 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
218                                  encode_stateid_maxsz + 4)
219 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
220                                  2 + decode_verifier_maxsz)
221 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
222 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
223                                  decode_verifier_maxsz)
224 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
225                                 nfs4_name_maxsz)
226 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
227                                  decode_change_info_maxsz)
228 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
229                                 2 * nfs4_name_maxsz)
230 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
231                                  decode_change_info_maxsz + \
232                                  decode_change_info_maxsz)
233 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
234                                 nfs4_name_maxsz)
235 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
236 #define encode_lockowner_maxsz  (7)
237 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
238                                  7 + \
239                                  1 + encode_stateid_maxsz + 1 + \
240                                  encode_lockowner_maxsz)
241 #define decode_lock_denied_maxsz \
242                                 (8 + decode_lockowner_maxsz)
243 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
244                                  decode_lock_denied_maxsz)
245 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
246                                 encode_lockowner_maxsz)
247 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
248                                  decode_lock_denied_maxsz)
249 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
250                                  encode_stateid_maxsz + \
251                                  4)
252 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
253                                  decode_stateid_maxsz)
254 #define encode_release_lockowner_maxsz \
255                                 (op_encode_hdr_maxsz + \
256                                  encode_lockowner_maxsz)
257 #define decode_release_lockowner_maxsz \
258                                 (op_decode_hdr_maxsz)
259 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
260 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
261 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
262                                 1 + nfs4_name_maxsz + \
263                                 1 + \
264                                 nfs4_fattr_maxsz)
265 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
266 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
267                                 1 + 2 + nfs4_name_maxsz + \
268                                 encode_attrs_maxsz)
269 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
270                                 decode_change_info_maxsz + \
271                                 nfs4_fattr_bitmap_maxsz)
272 #define encode_statfs_maxsz     (encode_getattr_maxsz)
273 #define decode_statfs_maxsz     (decode_getattr_maxsz)
274 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
275 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
276 #define encode_getacl_maxsz     (encode_getattr_maxsz)
277 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
278                                  nfs4_fattr_bitmap_maxsz + 1)
279 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
280                                  encode_stateid_maxsz + 3)
281 #define decode_setacl_maxsz     (decode_setattr_maxsz)
282 #define encode_fs_locations_maxsz \
283                                 (encode_getattr_maxsz)
284 #define decode_fs_locations_maxsz \
285                                 (0)
286 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
287 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
288 
289 #if defined(CONFIG_NFS_V4_1)
290 #define NFS4_MAX_MACHINE_NAME_LEN (64)
291 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
292                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
293 
294 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
295                                 encode_verifier_maxsz + \
296                                 1 /* co_ownerid.len */ + \
297                                 /* eia_clientowner */ \
298                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
299                                 1 /* flags */ + \
300                                 1 /* spa_how */ + \
301                                 /* max is SP4_MACH_CRED (for now) */ + \
302                                 1 + NFS4_OP_MAP_NUM_WORDS + \
303                                 1 + NFS4_OP_MAP_NUM_WORDS + \
304                                 1 /* implementation id array of size 1 */ + \
305                                 1 /* nii_domain */ + \
306                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
307                                 1 /* nii_name */ + \
308                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
309                                 3 /* nii_date */)
310 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
311                                 2 /* eir_clientid */ + \
312                                 1 /* eir_sequenceid */ + \
313                                 1 /* eir_flags */ + \
314                                 1 /* spr_how */ + \
315                                   /* max is SP4_MACH_CRED (for now) */ + \
316                                 1 + NFS4_OP_MAP_NUM_WORDS + \
317                                 1 + NFS4_OP_MAP_NUM_WORDS + \
318                                 2 /* eir_server_owner.so_minor_id */ + \
319                                 /* eir_server_owner.so_major_id<> */ \
320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
321                                 /* eir_server_scope<> */ \
322                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
323                                 1 /* eir_server_impl_id array length */ + \
324                                 1 /* nii_domain */ + \
325                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
326                                 1 /* nii_name */ + \
327                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
328                                 3 /* nii_date */)
329 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
330 #define decode_channel_attrs_maxsz  (6 + \
331                                      1 /* ca_rdma_ird.len */ + \
332                                      1 /* ca_rdma_ird */)
333 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
334                                      2 /* csa_clientid */ + \
335                                      1 /* csa_sequence */ + \
336                                      1 /* csa_flags */ + \
337                                      encode_channel_attrs_maxsz + \
338                                      encode_channel_attrs_maxsz + \
339                                      1 /* csa_cb_program */ + \
340                                      1 /* csa_sec_parms.len (1) */ + \
341                                      1 /* cb_secflavor (AUTH_SYS) */ + \
342                                      1 /* stamp */ + \
343                                      1 /* machinename.len */ + \
344                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
345                                      1 /* uid */ + \
346                                      1 /* gid */ + \
347                                      1 /* gids.len (0) */)
348 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
349                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
350                                      1 /* csr_sequence */ + \
351                                      1 /* csr_flags */ + \
352                                      decode_channel_attrs_maxsz + \
353                                      decode_channel_attrs_maxsz)
354 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
355                                      /* bctsa_sessid */ \
356                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
357                                      1 /* bctsa_dir */ + \
358                                      1 /* bctsa_use_conn_in_rdma_mode */)
359 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
360                                      /* bctsr_sessid */ \
361                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
362                                      1 /* bctsr_dir */ + \
363                                      1 /* bctsr_use_conn_in_rdma_mode */)
364 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
365 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
366 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
367 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
368 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
369                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
370 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
371                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
372 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
373 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
374 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
375                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
376                                 1 /* layout type */ + \
377                                 1 /* maxcount */ + \
378                                 1 /* bitmap size */ + \
379                                 1 /* notification bitmap length */ + \
380                                 1 /* notification bitmap, word 0 */)
381 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
382                                 1 /* layout type */ + \
383                                 1 /* opaque devaddr4 length */ + \
384                                   /* devaddr4 payload is read into page */ \
385                                 1 /* notification bitmap length */ + \
386                                 1 /* notification bitmap, word 0 */)
387 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
388                                 encode_stateid_maxsz)
389 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
390                                 decode_stateid_maxsz + \
391                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
392 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
393                                 2 /* offset */ + \
394                                 2 /* length */ + \
395                                 1 /* reclaim */ + \
396                                 encode_stateid_maxsz + \
397                                 1 /* new offset (true) */ + \
398                                 2 /* last byte written */ + \
399                                 1 /* nt_timechanged (false) */ + \
400                                 1 /* layoutupdate4 layout type */ + \
401                                 1 /* layoutupdate4 opaqueue len */)
402                                   /* the actual content of layoutupdate4 should
403                                      be allocated by drivers and spliced in
404                                      using xdr_write_pages */
405 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
406 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
407                                 encode_stateid_maxsz + \
408                                 1 + \
409                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
410 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
411                                 1 + decode_stateid_maxsz)
412 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
413 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
414 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
415                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
416 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
417 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
418                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
419 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
420 #else /* CONFIG_NFS_V4_1 */
421 #define encode_sequence_maxsz   0
422 #define decode_sequence_maxsz   0
423 #define encode_layoutreturn_maxsz 0
424 #define decode_layoutreturn_maxsz 0
425 #endif /* CONFIG_NFS_V4_1 */
426 
427 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
428 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
429 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
430                                 encode_sequence_maxsz + \
431                                 encode_putfh_maxsz + \
432                                 encode_read_maxsz)
433 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
434                                 decode_sequence_maxsz + \
435                                 decode_putfh_maxsz + \
436                                 decode_read_maxsz)
437 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
438                                 encode_sequence_maxsz + \
439                                 encode_putfh_maxsz + \
440                                 encode_readlink_maxsz)
441 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
442                                 decode_sequence_maxsz + \
443                                 decode_putfh_maxsz + \
444                                 decode_readlink_maxsz)
445 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
446                                 encode_sequence_maxsz + \
447                                 encode_putfh_maxsz + \
448                                 encode_readdir_maxsz)
449 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
450                                 decode_sequence_maxsz + \
451                                 decode_putfh_maxsz + \
452                                 decode_readdir_maxsz)
453 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
454                                 encode_sequence_maxsz + \
455                                 encode_putfh_maxsz + \
456                                 encode_write_maxsz + \
457                                 encode_getattr_maxsz)
458 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
459                                 decode_sequence_maxsz + \
460                                 decode_putfh_maxsz + \
461                                 decode_write_maxsz + \
462                                 decode_getattr_maxsz)
463 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
464                                 encode_sequence_maxsz + \
465                                 encode_putfh_maxsz + \
466                                 encode_commit_maxsz)
467 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
468                                 decode_sequence_maxsz + \
469                                 decode_putfh_maxsz + \
470                                 decode_commit_maxsz)
471 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
472                                 encode_sequence_maxsz + \
473                                 encode_putfh_maxsz + \
474                                 encode_open_maxsz + \
475                                 encode_access_maxsz + \
476                                 encode_getfh_maxsz + \
477                                 encode_getattr_maxsz)
478 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
479                                 decode_sequence_maxsz + \
480                                 decode_putfh_maxsz + \
481                                 decode_open_maxsz + \
482                                 decode_access_maxsz + \
483                                 decode_getfh_maxsz + \
484                                 decode_getattr_maxsz)
485 #define NFS4_enc_open_confirm_sz \
486                                 (compound_encode_hdr_maxsz + \
487                                  encode_putfh_maxsz + \
488                                  encode_open_confirm_maxsz)
489 #define NFS4_dec_open_confirm_sz \
490                                 (compound_decode_hdr_maxsz + \
491                                  decode_putfh_maxsz + \
492                                  decode_open_confirm_maxsz)
493 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
494                                         encode_sequence_maxsz + \
495                                         encode_putfh_maxsz + \
496                                         encode_open_maxsz + \
497                                         encode_access_maxsz + \
498                                         encode_getattr_maxsz)
499 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
500                                         decode_sequence_maxsz + \
501                                         decode_putfh_maxsz + \
502                                         decode_open_maxsz + \
503                                         decode_access_maxsz + \
504                                         decode_getattr_maxsz)
505 #define NFS4_enc_open_downgrade_sz \
506                                 (compound_encode_hdr_maxsz + \
507                                  encode_sequence_maxsz + \
508                                  encode_putfh_maxsz + \
509                                  encode_layoutreturn_maxsz + \
510                                  encode_open_downgrade_maxsz)
511 #define NFS4_dec_open_downgrade_sz \
512                                 (compound_decode_hdr_maxsz + \
513                                  decode_sequence_maxsz + \
514                                  decode_putfh_maxsz + \
515                                  decode_layoutreturn_maxsz + \
516                                  decode_open_downgrade_maxsz)
517 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
518                                  encode_sequence_maxsz + \
519                                  encode_putfh_maxsz + \
520                                  encode_layoutreturn_maxsz + \
521                                  encode_close_maxsz + \
522                                  encode_getattr_maxsz)
523 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
524                                  decode_sequence_maxsz + \
525                                  decode_putfh_maxsz + \
526                                  decode_layoutreturn_maxsz + \
527                                  decode_close_maxsz + \
528                                  decode_getattr_maxsz)
529 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
530                                  encode_sequence_maxsz + \
531                                  encode_putfh_maxsz + \
532                                  encode_setattr_maxsz + \
533                                  encode_getattr_maxsz)
534 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
535                                  decode_sequence_maxsz + \
536                                  decode_putfh_maxsz + \
537                                  decode_setattr_maxsz + \
538                                  decode_getattr_maxsz)
539 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
540                                 encode_sequence_maxsz + \
541                                 encode_putfh_maxsz + \
542                                 encode_fsinfo_maxsz)
543 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
544                                 decode_sequence_maxsz + \
545                                 decode_putfh_maxsz + \
546                                 decode_fsinfo_maxsz)
547 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
548                                 encode_renew_maxsz)
549 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
550                                 decode_renew_maxsz)
551 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
552                                 encode_setclientid_maxsz)
553 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
554                                 decode_setclientid_maxsz)
555 #define NFS4_enc_setclientid_confirm_sz \
556                                 (compound_encode_hdr_maxsz + \
557                                 encode_setclientid_confirm_maxsz)
558 #define NFS4_dec_setclientid_confirm_sz \
559                                 (compound_decode_hdr_maxsz + \
560                                 decode_setclientid_confirm_maxsz)
561 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
562                                 encode_sequence_maxsz + \
563                                 encode_putfh_maxsz + \
564                                 encode_lock_maxsz)
565 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
566                                 decode_sequence_maxsz + \
567                                 decode_putfh_maxsz + \
568                                 decode_lock_maxsz)
569 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
570                                 encode_sequence_maxsz + \
571                                 encode_putfh_maxsz + \
572                                 encode_lockt_maxsz)
573 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
574                                  decode_sequence_maxsz + \
575                                  decode_putfh_maxsz + \
576                                  decode_lockt_maxsz)
577 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
578                                 encode_sequence_maxsz + \
579                                 encode_putfh_maxsz + \
580                                 encode_locku_maxsz)
581 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
582                                 decode_sequence_maxsz + \
583                                 decode_putfh_maxsz + \
584                                 decode_locku_maxsz)
585 #define NFS4_enc_release_lockowner_sz \
586                                 (compound_encode_hdr_maxsz + \
587                                  encode_lockowner_maxsz)
588 #define NFS4_dec_release_lockowner_sz \
589                                 (compound_decode_hdr_maxsz + \
590                                  decode_lockowner_maxsz)
591 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
592                                 encode_sequence_maxsz + \
593                                 encode_putfh_maxsz + \
594                                 encode_access_maxsz + \
595                                 encode_getattr_maxsz)
596 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
597                                 decode_sequence_maxsz + \
598                                 decode_putfh_maxsz + \
599                                 decode_access_maxsz + \
600                                 decode_getattr_maxsz)
601 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
602                                 encode_sequence_maxsz + \
603                                 encode_putfh_maxsz + \
604                                 encode_getattr_maxsz + \
605                                 encode_renew_maxsz)
606 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
607                                 decode_sequence_maxsz + \
608                                 decode_putfh_maxsz + \
609                                 decode_getattr_maxsz + \
610                                 decode_renew_maxsz)
611 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
612                                 encode_sequence_maxsz + \
613                                 encode_putfh_maxsz + \
614                                 encode_lookup_maxsz + \
615                                 encode_getattr_maxsz + \
616                                 encode_getfh_maxsz)
617 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
618                                 decode_sequence_maxsz + \
619                                 decode_putfh_maxsz + \
620                                 decode_lookup_maxsz + \
621                                 decode_getattr_maxsz + \
622                                 decode_getfh_maxsz)
623 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
624                                 encode_sequence_maxsz + \
625                                 encode_putfh_maxsz + \
626                                 encode_lookupp_maxsz + \
627                                 encode_getattr_maxsz + \
628                                 encode_getfh_maxsz)
629 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
630                                 decode_sequence_maxsz + \
631                                 decode_putfh_maxsz + \
632                                 decode_lookupp_maxsz + \
633                                 decode_getattr_maxsz + \
634                                 decode_getfh_maxsz)
635 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
636                                 encode_sequence_maxsz + \
637                                 encode_putrootfh_maxsz + \
638                                 encode_getattr_maxsz + \
639                                 encode_getfh_maxsz)
640 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
641                                 decode_sequence_maxsz + \
642                                 decode_putrootfh_maxsz + \
643                                 decode_getattr_maxsz + \
644                                 decode_getfh_maxsz)
645 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
646                                 encode_sequence_maxsz + \
647                                 encode_putfh_maxsz + \
648                                 encode_remove_maxsz)
649 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
650                                 decode_sequence_maxsz + \
651                                 decode_putfh_maxsz + \
652                                 decode_remove_maxsz)
653 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
654                                 encode_sequence_maxsz + \
655                                 encode_putfh_maxsz + \
656                                 encode_savefh_maxsz + \
657                                 encode_putfh_maxsz + \
658                                 encode_rename_maxsz)
659 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
660                                 decode_sequence_maxsz + \
661                                 decode_putfh_maxsz + \
662                                 decode_savefh_maxsz + \
663                                 decode_putfh_maxsz + \
664                                 decode_rename_maxsz)
665 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
666                                 encode_sequence_maxsz + \
667                                 encode_putfh_maxsz + \
668                                 encode_savefh_maxsz + \
669                                 encode_putfh_maxsz + \
670                                 encode_link_maxsz + \
671                                 encode_restorefh_maxsz + \
672                                 encode_getattr_maxsz)
673 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
674                                 decode_sequence_maxsz + \
675                                 decode_putfh_maxsz + \
676                                 decode_savefh_maxsz + \
677                                 decode_putfh_maxsz + \
678                                 decode_link_maxsz + \
679                                 decode_restorefh_maxsz + \
680                                 decode_getattr_maxsz)
681 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
682                                 encode_sequence_maxsz + \
683                                 encode_putfh_maxsz + \
684                                 encode_symlink_maxsz + \
685                                 encode_getattr_maxsz + \
686                                 encode_getfh_maxsz)
687 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
688                                 decode_sequence_maxsz + \
689                                 decode_putfh_maxsz + \
690                                 decode_symlink_maxsz + \
691                                 decode_getattr_maxsz + \
692                                 decode_getfh_maxsz)
693 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
694                                 encode_sequence_maxsz + \
695                                 encode_putfh_maxsz + \
696                                 encode_create_maxsz + \
697                                 encode_getfh_maxsz + \
698                                 encode_getattr_maxsz)
699 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
700                                 decode_sequence_maxsz + \
701                                 decode_putfh_maxsz + \
702                                 decode_create_maxsz + \
703                                 decode_getfh_maxsz + \
704                                 decode_getattr_maxsz)
705 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
706                                 encode_sequence_maxsz + \
707                                 encode_putfh_maxsz + \
708                                 encode_getattr_maxsz)
709 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
710                                 decode_sequence_maxsz + \
711                                 decode_putfh_maxsz + \
712                                 decode_getattr_maxsz)
713 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
714                                 encode_sequence_maxsz + \
715                                 encode_putfh_maxsz + \
716                                 encode_statfs_maxsz)
717 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
718                                 decode_sequence_maxsz + \
719                                 decode_putfh_maxsz + \
720                                 decode_statfs_maxsz)
721 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
722                                 encode_sequence_maxsz + \
723                                 encode_putfh_maxsz + \
724                                 encode_getattr_maxsz)
725 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
726                                 decode_sequence_maxsz + \
727                                 decode_putfh_maxsz + \
728                                 decode_getattr_maxsz)
729 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
730                                 encode_sequence_maxsz + \
731                                 encode_putfh_maxsz + \
732                                 encode_layoutreturn_maxsz + \
733                                 encode_delegreturn_maxsz + \
734                                 encode_getattr_maxsz)
735 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
736                                 decode_sequence_maxsz + \
737                                 decode_putfh_maxsz + \
738                                 decode_layoutreturn_maxsz + \
739                                 decode_delegreturn_maxsz + \
740                                 decode_getattr_maxsz)
741 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
742                                 encode_sequence_maxsz + \
743                                 encode_putfh_maxsz + \
744                                 encode_getacl_maxsz)
745 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
746                                 decode_sequence_maxsz + \
747                                 decode_putfh_maxsz + \
748                                 decode_getacl_maxsz)
749 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
750                                 encode_sequence_maxsz + \
751                                 encode_putfh_maxsz + \
752                                 encode_setacl_maxsz)
753 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
754                                 decode_sequence_maxsz + \
755                                 decode_putfh_maxsz + \
756                                 decode_setacl_maxsz)
757 #define NFS4_enc_fs_locations_sz \
758                                 (compound_encode_hdr_maxsz + \
759                                  encode_sequence_maxsz + \
760                                  encode_putfh_maxsz + \
761                                  encode_lookup_maxsz + \
762                                  encode_fs_locations_maxsz + \
763                                  encode_renew_maxsz)
764 #define NFS4_dec_fs_locations_sz \
765                                 (compound_decode_hdr_maxsz + \
766                                  decode_sequence_maxsz + \
767                                  decode_putfh_maxsz + \
768                                  decode_lookup_maxsz + \
769                                  decode_fs_locations_maxsz + \
770                                  decode_renew_maxsz)
771 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
772                                 encode_sequence_maxsz + \
773                                 encode_putfh_maxsz + \
774                                 encode_secinfo_maxsz)
775 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
776                                 decode_sequence_maxsz + \
777                                 decode_putfh_maxsz + \
778                                 decode_secinfo_maxsz)
779 #define NFS4_enc_fsid_present_sz \
780                                 (compound_encode_hdr_maxsz + \
781                                  encode_sequence_maxsz + \
782                                  encode_putfh_maxsz + \
783                                  encode_getfh_maxsz + \
784                                  encode_renew_maxsz)
785 #define NFS4_dec_fsid_present_sz \
786                                 (compound_decode_hdr_maxsz + \
787                                  decode_sequence_maxsz + \
788                                  decode_putfh_maxsz + \
789                                  decode_getfh_maxsz + \
790                                  decode_renew_maxsz)
791 #if defined(CONFIG_NFS_V4_1)
792 #define NFS4_enc_bind_conn_to_session_sz \
793                                 (compound_encode_hdr_maxsz + \
794                                  encode_bind_conn_to_session_maxsz)
795 #define NFS4_dec_bind_conn_to_session_sz \
796                                 (compound_decode_hdr_maxsz + \
797                                  decode_bind_conn_to_session_maxsz)
798 #define NFS4_enc_exchange_id_sz \
799                                 (compound_encode_hdr_maxsz + \
800                                  encode_exchange_id_maxsz)
801 #define NFS4_dec_exchange_id_sz \
802                                 (compound_decode_hdr_maxsz + \
803                                  decode_exchange_id_maxsz)
804 #define NFS4_enc_create_session_sz \
805                                 (compound_encode_hdr_maxsz + \
806                                  encode_create_session_maxsz)
807 #define NFS4_dec_create_session_sz \
808                                 (compound_decode_hdr_maxsz + \
809                                  decode_create_session_maxsz)
810 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
811                                          encode_destroy_session_maxsz)
812 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
813                                          decode_destroy_session_maxsz)
814 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
815                                          encode_destroy_clientid_maxsz)
816 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
817                                          decode_destroy_clientid_maxsz)
818 #define NFS4_enc_sequence_sz \
819                                 (compound_decode_hdr_maxsz + \
820                                  encode_sequence_maxsz)
821 #define NFS4_dec_sequence_sz \
822                                 (compound_decode_hdr_maxsz + \
823                                  decode_sequence_maxsz)
824 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
825                                          encode_sequence_maxsz + \
826                                          encode_putrootfh_maxsz + \
827                                          encode_fsinfo_maxsz)
828 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
829                                          decode_sequence_maxsz + \
830                                          decode_putrootfh_maxsz + \
831                                          decode_fsinfo_maxsz)
832 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
833                                          encode_sequence_maxsz + \
834                                          encode_reclaim_complete_maxsz)
835 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
836                                          decode_sequence_maxsz + \
837                                          decode_reclaim_complete_maxsz)
838 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
839                                 encode_sequence_maxsz +\
840                                 encode_getdeviceinfo_maxsz)
841 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
842                                 decode_sequence_maxsz + \
843                                 decode_getdeviceinfo_maxsz)
844 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
845                                 encode_sequence_maxsz + \
846                                 encode_putfh_maxsz +        \
847                                 encode_layoutget_maxsz)
848 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
849                                 decode_sequence_maxsz + \
850                                 decode_putfh_maxsz +        \
851                                 decode_layoutget_maxsz)
852 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
853                                 encode_sequence_maxsz +\
854                                 encode_putfh_maxsz + \
855                                 encode_layoutcommit_maxsz + \
856                                 encode_getattr_maxsz)
857 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
858                                 decode_sequence_maxsz + \
859                                 decode_putfh_maxsz + \
860                                 decode_layoutcommit_maxsz + \
861                                 decode_getattr_maxsz)
862 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
863                                 encode_sequence_maxsz + \
864                                 encode_putfh_maxsz + \
865                                 encode_layoutreturn_maxsz)
866 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
867                                 decode_sequence_maxsz + \
868                                 decode_putfh_maxsz + \
869                                 decode_layoutreturn_maxsz)
870 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
871                                         encode_sequence_maxsz + \
872                                         encode_putrootfh_maxsz +\
873                                         encode_secinfo_no_name_maxsz)
874 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
875                                         decode_sequence_maxsz + \
876                                         decode_putrootfh_maxsz + \
877                                         decode_secinfo_no_name_maxsz)
878 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
879                                          encode_sequence_maxsz + \
880                                          encode_test_stateid_maxsz)
881 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
882                                          decode_sequence_maxsz + \
883                                          decode_test_stateid_maxsz)
884 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
885                                          encode_sequence_maxsz + \
886                                          encode_free_stateid_maxsz)
887 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
888                                          decode_sequence_maxsz + \
889                                          decode_free_stateid_maxsz)
890 
891 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
892                                       compound_encode_hdr_maxsz +
893                                       encode_sequence_maxsz +
894                                       encode_putfh_maxsz +
895                                       encode_getattr_maxsz) *
896                                      XDR_UNIT);
897 
898 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
899                                      compound_decode_hdr_maxsz +
900                                      decode_sequence_maxsz +
901                                      decode_putfh_maxsz) *
902                                     XDR_UNIT);
903 
904 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
905                                            compound_decode_hdr_maxsz +
906                                            decode_sequence_maxsz) *
907                                           XDR_UNIT);
908 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
909 #endif /* CONFIG_NFS_V4_1 */
910 
911 static const umode_t nfs_type2fmt[] = {
912         [NF4BAD] = 0,
913         [NF4REG] = S_IFREG,
914         [NF4DIR] = S_IFDIR,
915         [NF4BLK] = S_IFBLK,
916         [NF4CHR] = S_IFCHR,
917         [NF4LNK] = S_IFLNK,
918         [NF4SOCK] = S_IFSOCK,
919         [NF4FIFO] = S_IFIFO,
920         [NF4ATTRDIR] = 0,
921         [NF4NAMEDATTR] = 0,
922 };
923 
924 struct compound_hdr {
925         int32_t         status;
926         uint32_t        nops;
927         __be32 *        nops_p;
928         uint32_t        taglen;
929         char *          tag;
930         uint32_t        replen;         /* expected reply words */
931         u32             minorversion;
932 };
933 
934 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
935 {
936         __be32 *p = xdr_reserve_space(xdr, nbytes);
937         BUG_ON(!p);
938         return p;
939 }
940 
941 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
942 {
943         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
944 }
945 
946 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
947 {
948         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
949 }
950 
951 static void encode_uint32(struct xdr_stream *xdr, u32 n)
952 {
953         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
954 }
955 
956 static void encode_uint64(struct xdr_stream *xdr, u64 n)
957 {
958         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
959 }
960 
961 static void encode_nfs4_seqid(struct xdr_stream *xdr,
962                 const struct nfs_seqid *seqid)
963 {
964         if (seqid != NULL)
965                 encode_uint32(xdr, seqid->sequence->counter);
966         else
967                 encode_uint32(xdr, 0);
968 }
969 
970 static void encode_compound_hdr(struct xdr_stream *xdr,
971                                 struct rpc_rqst *req,
972                                 struct compound_hdr *hdr)
973 {
974         __be32 *p;
975         struct rpc_auth *auth = req->rq_cred->cr_auth;
976 
977         /* initialize running count of expected bytes in reply.
978          * NOTE: the replied tag SHOULD be the same is the one sent,
979          * but this is not required as a MUST for the server to do so. */
980         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
981 
982         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
983         encode_string(xdr, hdr->taglen, hdr->tag);
984         p = reserve_space(xdr, 8);
985         *p++ = cpu_to_be32(hdr->minorversion);
986         hdr->nops_p = p;
987         *p = cpu_to_be32(hdr->nops);
988 }
989 
990 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
991                 uint32_t replen,
992                 struct compound_hdr *hdr)
993 {
994         encode_uint32(xdr, op);
995         hdr->nops++;
996         hdr->replen += replen;
997 }
998 
999 static void encode_nops(struct compound_hdr *hdr)
1000 {
1001         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1002         *hdr->nops_p = htonl(hdr->nops);
1003 }
1004 
1005 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1006 {
1007         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1008 }
1009 
1010 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1011 {
1012         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1013 }
1014 
1015 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1016                                 const struct nfs4_label *label,
1017                                 const umode_t *umask,
1018                                 const struct nfs_server *server,
1019                                 const uint32_t attrmask[])
1020 {
1021         char owner_name[IDMAP_NAMESZ];
1022         char owner_group[IDMAP_NAMESZ];
1023         int owner_namelen = 0;
1024         int owner_grouplen = 0;
1025         __be32 *p;
1026         unsigned i;
1027         uint32_t len = 0;
1028         uint32_t bmval_len;
1029         uint32_t bmval[3] = { 0 };
1030 
1031         /*
1032          * We reserve enough space to write the entire attribute buffer at once.
1033          */
1034         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1035                 bmval[0] |= FATTR4_WORD0_SIZE;
1036                 len += 8;
1037         }
1038         if (iap->ia_valid & ATTR_MODE) {
1039                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1040                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1041                         len += 8;
1042                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1043                         bmval[1] |= FATTR4_WORD1_MODE;
1044                         len += 4;
1045                 }
1046         }
1047         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1048                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1049                 if (owner_namelen < 0) {
1050                         dprintk("nfs: couldn't resolve uid %d to string\n",
1051                                         from_kuid(&init_user_ns, iap->ia_uid));
1052                         /* XXX */
1053                         strcpy(owner_name, "nobody");
1054                         owner_namelen = sizeof("nobody") - 1;
1055                         /* goto out; */
1056                 }
1057                 bmval[1] |= FATTR4_WORD1_OWNER;
1058                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1059         }
1060         if ((iap->ia_valid & ATTR_GID) &&
1061            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1062                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1063                 if (owner_grouplen < 0) {
1064                         dprintk("nfs: couldn't resolve gid %d to string\n",
1065                                         from_kgid(&init_user_ns, iap->ia_gid));
1066                         strcpy(owner_group, "nobody");
1067                         owner_grouplen = sizeof("nobody") - 1;
1068                         /* goto out; */
1069                 }
1070                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1071                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1072         }
1073         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1074                 if (iap->ia_valid & ATTR_ATIME_SET) {
1075                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1076                         len += 16;
1077                 } else if (iap->ia_valid & ATTR_ATIME) {
1078                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1079                         len += 4;
1080                 }
1081         }
1082         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1083                 if (iap->ia_valid & ATTR_MTIME_SET) {
1084                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1085                         len += 16;
1086                 } else if (iap->ia_valid & ATTR_MTIME) {
1087                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1088                         len += 4;
1089                 }
1090         }
1091 
1092         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1093                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1094                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1095         }
1096 
1097         if (bmval[2] != 0)
1098                 bmval_len = 3;
1099         else if (bmval[1] != 0)
1100                 bmval_len = 2;
1101         else
1102                 bmval_len = 1;
1103 
1104         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1105 
1106         *p++ = cpu_to_be32(bmval_len);
1107         for (i = 0; i < bmval_len; i++)
1108                 *p++ = cpu_to_be32(bmval[i]);
1109         *p++ = cpu_to_be32(len);
1110 
1111         if (bmval[0] & FATTR4_WORD0_SIZE)
1112                 p = xdr_encode_hyper(p, iap->ia_size);
1113         if (bmval[1] & FATTR4_WORD1_MODE)
1114                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1115         if (bmval[1] & FATTR4_WORD1_OWNER)
1116                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1117         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1118                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1119         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1120                 if (iap->ia_valid & ATTR_ATIME_SET) {
1121                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1122                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1123                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1124                 } else
1125                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1126         }
1127         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1128                 if (iap->ia_valid & ATTR_MTIME_SET) {
1129                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1130                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1131                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1132                 } else
1133                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1134         }
1135         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1136                 *p++ = cpu_to_be32(label->lfs);
1137                 *p++ = cpu_to_be32(label->pi);
1138                 *p++ = cpu_to_be32(label->len);
1139                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1140         }
1141         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1142                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1143                 *p++ = cpu_to_be32(*umask);
1144         }
1145 
1146 /* out: */
1147 }
1148 
1149 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1150 {
1151         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1152         encode_uint32(xdr, access);
1153 }
1154 
1155 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1156 {
1157         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1158         encode_nfs4_seqid(xdr, arg->seqid);
1159         encode_nfs4_stateid(xdr, &arg->stateid);
1160 }
1161 
1162 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1163 {
1164         __be32 *p;
1165 
1166         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1167         p = reserve_space(xdr, 12);
1168         p = xdr_encode_hyper(p, args->offset);
1169         *p = cpu_to_be32(args->count);
1170 }
1171 
1172 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1173 {
1174         __be32 *p;
1175 
1176         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1177         encode_uint32(xdr, create->ftype);
1178 
1179         switch (create->ftype) {
1180         case NF4LNK:
1181                 p = reserve_space(xdr, 4);
1182                 *p = cpu_to_be32(create->u.symlink.len);
1183                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1184                                 create->u.symlink.len);
1185                 xdr->buf->flags |= XDRBUF_WRITE;
1186                 break;
1187 
1188         case NF4BLK: case NF4CHR:
1189                 p = reserve_space(xdr, 8);
1190                 *p++ = cpu_to_be32(create->u.device.specdata1);
1191                 *p = cpu_to_be32(create->u.device.specdata2);
1192                 break;
1193 
1194         default:
1195                 break;
1196         }
1197 
1198         encode_string(xdr, create->name->len, create->name->name);
1199         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1200                         create->server, create->server->attr_bitmask);
1201 }
1202 
1203 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1204 {
1205         __be32 *p;
1206 
1207         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208         p = reserve_space(xdr, 8);
1209         *p++ = cpu_to_be32(1);
1210         *p = cpu_to_be32(bitmap);
1211 }
1212 
1213 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216 
1217         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218         p = reserve_space(xdr, 12);
1219         *p++ = cpu_to_be32(2);
1220         *p++ = cpu_to_be32(bm0);
1221         *p = cpu_to_be32(bm1);
1222 }
1223 
1224 static void
1225 encode_getattr_three(struct xdr_stream *xdr,
1226                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1227                      struct compound_hdr *hdr)
1228 {
1229         __be32 *p;
1230 
1231         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1232         if (bm2) {
1233                 p = reserve_space(xdr, 16);
1234                 *p++ = cpu_to_be32(3);
1235                 *p++ = cpu_to_be32(bm0);
1236                 *p++ = cpu_to_be32(bm1);
1237                 *p = cpu_to_be32(bm2);
1238         } else if (bm1) {
1239                 p = reserve_space(xdr, 12);
1240                 *p++ = cpu_to_be32(2);
1241                 *p++ = cpu_to_be32(bm0);
1242                 *p = cpu_to_be32(bm1);
1243         } else {
1244                 p = reserve_space(xdr, 8);
1245                 *p++ = cpu_to_be32(1);
1246                 *p = cpu_to_be32(bm0);
1247         }
1248 }
1249 
1250 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251 {
1252         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1253                            bitmask[1] & nfs4_fattr_bitmap[1],
1254                            bitmask[2] & nfs4_fattr_bitmap[2],
1255                            hdr);
1256 }
1257 
1258 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1259                                  const u32 *open_bitmap,
1260                                  struct compound_hdr *hdr)
1261 {
1262         encode_getattr_three(xdr,
1263                              bitmask[0] & open_bitmap[0],
1264                              bitmask[1] & open_bitmap[1],
1265                              bitmask[2] & open_bitmap[2],
1266                              hdr);
1267 }
1268 
1269 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1270 {
1271         encode_getattr_three(xdr,
1272                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1273                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1274                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1275                              hdr);
1276 }
1277 
1278 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1281                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1282 }
1283 
1284 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285 {
1286         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287 }
1288 
1289 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290 {
1291         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292         encode_string(xdr, name->len, name->name);
1293 }
1294 
1295 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296 {
1297         if (fl->fl_type == F_RDLCK)
1298                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1299         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300 }
1301 
1302 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303 {
1304         if (fl->fl_end == OFFSET_MAX)
1305                 return ~(uint64_t)0;
1306         return fl->fl_end - fl->fl_start + 1;
1307 }
1308 
1309 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310 {
1311         __be32 *p;
1312 
1313         p = reserve_space(xdr, 32);
1314         p = xdr_encode_hyper(p, lowner->clientid);
1315         *p++ = cpu_to_be32(20);
1316         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317         *p++ = cpu_to_be32(lowner->s_dev);
1318         xdr_encode_hyper(p, lowner->id);
1319 }
1320 
1321 /*
1322  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324  */
1325 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326 {
1327         __be32 *p;
1328 
1329         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330         p = reserve_space(xdr, 28);
1331         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332         *p++ = cpu_to_be32(args->reclaim);
1333         p = xdr_encode_hyper(p, args->fl->fl_start);
1334         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335         *p = cpu_to_be32(args->new_lock_owner);
1336         if (args->new_lock_owner){
1337                 encode_nfs4_seqid(xdr, args->open_seqid);
1338                 encode_nfs4_stateid(xdr, &args->open_stateid);
1339                 encode_nfs4_seqid(xdr, args->lock_seqid);
1340                 encode_lockowner(xdr, &args->lock_owner);
1341         }
1342         else {
1343                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1344                 encode_nfs4_seqid(xdr, args->lock_seqid);
1345         }
1346 }
1347 
1348 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349 {
1350         __be32 *p;
1351 
1352         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353         p = reserve_space(xdr, 20);
1354         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357         encode_lockowner(xdr, &args->lock_owner);
1358 }
1359 
1360 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361 {
1362         __be32 *p;
1363 
1364         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366         encode_nfs4_seqid(xdr, args->seqid);
1367         encode_nfs4_stateid(xdr, &args->stateid);
1368         p = reserve_space(xdr, 16);
1369         p = xdr_encode_hyper(p, args->fl->fl_start);
1370         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371 }
1372 
1373 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374 {
1375         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376         encode_lockowner(xdr, lowner);
1377 }
1378 
1379 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380 {
1381         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382         encode_string(xdr, name->len, name->name);
1383 }
1384 
1385 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1386 {
1387         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1388 }
1389 
1390 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1391 {
1392         __be32 *p;
1393 
1394         p = reserve_space(xdr, 8);
1395         *p++ = cpu_to_be32(share_access);
1396         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1397 }
1398 
1399 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401         __be32 *p;
1402  /*
1403  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1404  * owner 4 = 32
1405  */
1406         encode_nfs4_seqid(xdr, arg->seqid);
1407         encode_share_access(xdr, arg->share_access);
1408         p = reserve_space(xdr, 36);
1409         p = xdr_encode_hyper(p, arg->clientid);
1410         *p++ = cpu_to_be32(24);
1411         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1412         *p++ = cpu_to_be32(arg->server->s_dev);
1413         *p++ = cpu_to_be32(arg->id.uniquifier);
1414         xdr_encode_hyper(p, arg->id.create_time);
1415 }
1416 
1417 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419         __be32 *p;
1420 
1421         p = reserve_space(xdr, 4);
1422         switch(arg->createmode) {
1423         case NFS4_CREATE_UNCHECKED:
1424                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1425                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1426                                 arg->server, arg->server->attr_bitmask);
1427                 break;
1428         case NFS4_CREATE_GUARDED:
1429                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1430                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1431                                 arg->server, arg->server->attr_bitmask);
1432                 break;
1433         case NFS4_CREATE_EXCLUSIVE:
1434                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1435                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1436                 break;
1437         case NFS4_CREATE_EXCLUSIVE4_1:
1438                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1439                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1440                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1441                                 arg->server, arg->server->exclcreat_bitmask);
1442         }
1443 }
1444 
1445 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1446 {
1447         __be32 *p;
1448 
1449         p = reserve_space(xdr, 4);
1450         switch (arg->open_flags & O_CREAT) {
1451         case 0:
1452                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1453                 break;
1454         default:
1455                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1456                 encode_createmode(xdr, arg);
1457         }
1458 }
1459 
1460 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1461 {
1462         __be32 *p;
1463 
1464         p = reserve_space(xdr, 4);
1465         switch (delegation_type) {
1466         case 0:
1467                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1468                 break;
1469         case FMODE_READ:
1470                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1471                 break;
1472         case FMODE_WRITE|FMODE_READ:
1473                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1474                 break;
1475         default:
1476                 BUG();
1477         }
1478 }
1479 
1480 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1481 {
1482         __be32 *p;
1483 
1484         p = reserve_space(xdr, 4);
1485         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1486         encode_string(xdr, name->len, name->name);
1487 }
1488 
1489 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1490 {
1491         __be32 *p;
1492 
1493         p = reserve_space(xdr, 4);
1494         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1495         encode_delegation_type(xdr, type);
1496 }
1497 
1498 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1499 {
1500         __be32 *p;
1501 
1502         p = reserve_space(xdr, 4);
1503         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1504         encode_nfs4_stateid(xdr, stateid);
1505         encode_string(xdr, name->len, name->name);
1506 }
1507 
1508 static inline void encode_claim_fh(struct xdr_stream *xdr)
1509 {
1510         __be32 *p;
1511 
1512         p = reserve_space(xdr, 4);
1513         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1514 }
1515 
1516 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1517 {
1518         __be32 *p;
1519 
1520         p = reserve_space(xdr, 4);
1521         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522         encode_nfs4_stateid(xdr, stateid);
1523 }
1524 
1525 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1526 {
1527         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1528         encode_openhdr(xdr, arg);
1529         encode_opentype(xdr, arg);
1530         switch (arg->claim) {
1531         case NFS4_OPEN_CLAIM_NULL:
1532                 encode_claim_null(xdr, arg->name);
1533                 break;
1534         case NFS4_OPEN_CLAIM_PREVIOUS:
1535                 encode_claim_previous(xdr, arg->u.delegation_type);
1536                 break;
1537         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1539                 break;
1540         case NFS4_OPEN_CLAIM_FH:
1541                 encode_claim_fh(xdr);
1542                 break;
1543         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1544                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1545                 break;
1546         default:
1547                 BUG();
1548         }
1549 }
1550 
1551 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1554         encode_nfs4_stateid(xdr, arg->stateid);
1555         encode_nfs4_seqid(xdr, arg->seqid);
1556 }
1557 
1558 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1559 {
1560         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1561         encode_nfs4_stateid(xdr, &arg->stateid);
1562         encode_nfs4_seqid(xdr, arg->seqid);
1563         encode_share_access(xdr, arg->share_access);
1564 }
1565 
1566 static void
1567 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1568 {
1569         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1570         encode_string(xdr, fh->size, fh->data);
1571 }
1572 
1573 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1574 {
1575         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1576 }
1577 
1578 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1579                         struct compound_hdr *hdr)
1580 {
1581         __be32 *p;
1582 
1583         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1584         encode_nfs4_stateid(xdr, &args->stateid);
1585 
1586         p = reserve_space(xdr, 12);
1587         p = xdr_encode_hyper(p, args->offset);
1588         *p = cpu_to_be32(args->count);
1589 }
1590 
1591 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1592 {
1593         uint32_t attrs[3] = {
1594                 FATTR4_WORD0_RDATTR_ERROR,
1595                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1596         };
1597         uint32_t dircount = readdir->count >> 1;
1598         __be32 *p, verf[2];
1599         uint32_t attrlen = 0;
1600         unsigned int i;
1601 
1602         if (readdir->plus) {
1603                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1604                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1605                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1606                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1607                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1608                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1609                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1610                 dircount >>= 1;
1611         }
1612         /* Use mounted_on_fileid only if the server supports it */
1613         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1614                 attrs[0] |= FATTR4_WORD0_FILEID;
1615         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1616                 attrs[i] &= readdir->bitmask[i];
1617                 if (attrs[i] != 0)
1618                         attrlen = i+1;
1619         }
1620 
1621         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1622         encode_uint64(xdr, readdir->cookie);
1623         encode_nfs4_verifier(xdr, &readdir->verifier);
1624         p = reserve_space(xdr, 12 + (attrlen << 2));
1625         *p++ = cpu_to_be32(dircount);
1626         *p++ = cpu_to_be32(readdir->count);
1627         *p++ = cpu_to_be32(attrlen);
1628         for (i = 0; i < attrlen; i++)
1629                 *p++ = cpu_to_be32(attrs[i]);
1630         memcpy(verf, readdir->verifier.data, sizeof(verf));
1631 
1632         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1633                         __func__,
1634                         (unsigned long long)readdir->cookie,
1635                         verf[0], verf[1],
1636                         attrs[0] & readdir->bitmask[0],
1637                         attrs[1] & readdir->bitmask[1],
1638                         attrs[2] & readdir->bitmask[2]);
1639 }
1640 
1641 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1644 }
1645 
1646 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1647 {
1648         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1649         encode_string(xdr, name->len, name->name);
1650 }
1651 
1652 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1653 {
1654         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1655         encode_string(xdr, oldname->len, oldname->name);
1656         encode_string(xdr, newname->len, newname->name);
1657 }
1658 
1659 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1660                          struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1663         encode_uint64(xdr, clid);
1664 }
1665 
1666 static void
1667 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668 {
1669         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1670 }
1671 
1672 static void
1673 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1674                 struct compound_hdr *hdr)
1675 {
1676         __be32 *p;
1677 
1678         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1679         encode_nfs4_stateid(xdr, &zero_stateid);
1680         p = reserve_space(xdr, 2*4);
1681         *p++ = cpu_to_be32(1);
1682         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1683         p = reserve_space(xdr, 4);
1684         *p = cpu_to_be32(arg->acl_len);
1685         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1686 }
1687 
1688 static void
1689 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1690 {
1691         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1692 }
1693 
1694 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1695 {
1696         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1697         encode_nfs4_stateid(xdr, &arg->stateid);
1698         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1699                         server->attr_bitmask);
1700 }
1701 
1702 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1703 {
1704         __be32 *p;
1705 
1706         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1707         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1708 
1709         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1710                         setclientid->sc_clnt->cl_owner_id);
1711         p = reserve_space(xdr, 4);
1712         *p = cpu_to_be32(setclientid->sc_prog);
1713         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1714         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1715         p = reserve_space(xdr, 4);
1716         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1717 }
1718 
1719 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1720 {
1721         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1722                         decode_setclientid_confirm_maxsz, hdr);
1723         encode_uint64(xdr, arg->clientid);
1724         encode_nfs4_verifier(xdr, &arg->confirm);
1725 }
1726 
1727 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1728                          struct compound_hdr *hdr)
1729 {
1730         __be32 *p;
1731 
1732         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1733         encode_nfs4_stateid(xdr, &args->stateid);
1734 
1735         p = reserve_space(xdr, 16);
1736         p = xdr_encode_hyper(p, args->offset);
1737         *p++ = cpu_to_be32(args->stable);
1738         *p = cpu_to_be32(args->count);
1739 
1740         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1741 }
1742 
1743 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1744 {
1745         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1746         encode_nfs4_stateid(xdr, stateid);
1747 }
1748 
1749 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1750 {
1751         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1752         encode_string(xdr, name->len, name->name);
1753 }
1754 
1755 #if defined(CONFIG_NFS_V4_1)
1756 /* NFSv4.1 operations */
1757 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1758                                    const struct nfs41_bind_conn_to_session_args *args,
1759                                    struct compound_hdr *hdr)
1760 {
1761         __be32 *p;
1762 
1763         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1764                 decode_bind_conn_to_session_maxsz, hdr);
1765         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1766         p = xdr_reserve_space(xdr, 8);
1767         *p++ = cpu_to_be32(args->dir);
1768         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1769 }
1770 
1771 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1772 {
1773         unsigned int i;
1774         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1775         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1776                 encode_uint32(xdr, op_map->u.words[i]);
1777 }
1778 
1779 static void encode_exchange_id(struct xdr_stream *xdr,
1780                                const struct nfs41_exchange_id_args *args,
1781                                struct compound_hdr *hdr)
1782 {
1783         __be32 *p;
1784         char impl_name[IMPL_NAME_LIMIT];
1785         int len = 0;
1786 
1787         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1788         encode_nfs4_verifier(xdr, &args->verifier);
1789 
1790         encode_string(xdr, strlen(args->client->cl_owner_id),
1791                         args->client->cl_owner_id);
1792 
1793         encode_uint32(xdr, args->flags);
1794         encode_uint32(xdr, args->state_protect.how);
1795 
1796         switch (args->state_protect.how) {
1797         case SP4_NONE:
1798                 break;
1799         case SP4_MACH_CRED:
1800                 encode_op_map(xdr, &args->state_protect.enforce);
1801                 encode_op_map(xdr, &args->state_protect.allow);
1802                 break;
1803         default:
1804                 WARN_ON_ONCE(1);
1805                 break;
1806         }
1807 
1808         if (send_implementation_id &&
1809             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1810             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1811                 <= sizeof(impl_name) + 1)
1812                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1813                                utsname()->sysname, utsname()->release,
1814                                utsname()->version, utsname()->machine);
1815 
1816         if (len > 0) {
1817                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1818 
1819                 encode_string(xdr,
1820                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1821                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1822                 encode_string(xdr, len, impl_name);
1823                 /* just send zeros for nii_date - the date is in nii_name */
1824                 p = reserve_space(xdr, 12);
1825                 p = xdr_encode_hyper(p, 0);
1826                 *p = cpu_to_be32(0);
1827         } else
1828                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1829 }
1830 
1831 static void encode_create_session(struct xdr_stream *xdr,
1832                                   const struct nfs41_create_session_args *args,
1833                                   struct compound_hdr *hdr)
1834 {
1835         __be32 *p;
1836         struct nfs_client *clp = args->client;
1837         struct rpc_clnt *clnt = clp->cl_rpcclient;
1838         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1839         u32 max_resp_sz_cached;
1840 
1841         /*
1842          * Assumes OPEN is the biggest non-idempotent compound.
1843          * 2 is the verifier.
1844          */
1845         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1846                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1847 
1848         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1849         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1850         p = xdr_encode_hyper(p, args->clientid);
1851         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1852         *p++ = cpu_to_be32(args->flags);                        /*flags */
1853 
1854         /* Fore Channel */
1855         *p++ = cpu_to_be32(0);                          /* header padding size */
1856         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1857         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1858         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1859         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1860         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1861         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1862 
1863         /* Back Channel */
1864         *p++ = cpu_to_be32(0);                          /* header padding size */
1865         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1866         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1867         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1868         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1869         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1870         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1871 
1872         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1873         *p++ = cpu_to_be32(1);
1874         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1875 
1876         /* authsys_parms rfc1831 */
1877         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1878         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1879         *p++ = cpu_to_be32(0);                          /* UID */
1880         *p++ = cpu_to_be32(0);                          /* GID */
1881         *p = cpu_to_be32(0);                            /* No more gids */
1882 }
1883 
1884 static void encode_destroy_session(struct xdr_stream *xdr,
1885                                    const struct nfs4_session *session,
1886                                    struct compound_hdr *hdr)
1887 {
1888         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1889         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1890 }
1891 
1892 static void encode_destroy_clientid(struct xdr_stream *xdr,
1893                                    uint64_t clientid,
1894                                    struct compound_hdr *hdr)
1895 {
1896         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1897         encode_uint64(xdr, clientid);
1898 }
1899 
1900 static void encode_reclaim_complete(struct xdr_stream *xdr,
1901                                     const struct nfs41_reclaim_complete_args *args,
1902                                     struct compound_hdr *hdr)
1903 {
1904         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1905         encode_uint32(xdr, args->one_fs);
1906 }
1907 #endif /* CONFIG_NFS_V4_1 */
1908 
1909 static void encode_sequence(struct xdr_stream *xdr,
1910                             const struct nfs4_sequence_args *args,
1911                             struct compound_hdr *hdr)
1912 {
1913 #if defined(CONFIG_NFS_V4_1)
1914         struct nfs4_session *session;
1915         struct nfs4_slot_table *tp;
1916         struct nfs4_slot *slot = args->sa_slot;
1917         __be32 *p;
1918 
1919         tp = slot->table;
1920         session = tp->session;
1921         if (!session)
1922                 return;
1923 
1924         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1925 
1926         /*
1927          * Sessionid + seqid + slotid + max slotid + cache_this
1928          */
1929         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1930                 "max_slotid=%d cache_this=%d\n",
1931                 __func__,
1932                 ((u32 *)session->sess_id.data)[0],
1933                 ((u32 *)session->sess_id.data)[1],
1934                 ((u32 *)session->sess_id.data)[2],
1935                 ((u32 *)session->sess_id.data)[3],
1936                 slot->seq_nr, slot->slot_nr,
1937                 tp->highest_used_slotid, args->sa_cache_this);
1938         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1939         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1940         *p++ = cpu_to_be32(slot->seq_nr);
1941         *p++ = cpu_to_be32(slot->slot_nr);
1942         *p++ = cpu_to_be32(tp->highest_used_slotid);
1943         *p = cpu_to_be32(args->sa_cache_this);
1944 #endif /* CONFIG_NFS_V4_1 */
1945 }
1946 
1947 #ifdef CONFIG_NFS_V4_1
1948 static void
1949 encode_getdeviceinfo(struct xdr_stream *xdr,
1950                      const struct nfs4_getdeviceinfo_args *args,
1951                      struct compound_hdr *hdr)
1952 {
1953         __be32 *p;
1954 
1955         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1956         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1957         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1958                                     NFS4_DEVICEID4_SIZE);
1959         *p++ = cpu_to_be32(args->pdev->layout_type);
1960         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1961 
1962         p = reserve_space(xdr, 4 + 4);
1963         *p++ = cpu_to_be32(1);                  /* bitmap length */
1964         *p++ = cpu_to_be32(args->notify_types);
1965 }
1966 
1967 static void
1968 encode_layoutget(struct xdr_stream *xdr,
1969                       const struct nfs4_layoutget_args *args,
1970                       struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973 
1974         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1975         p = reserve_space(xdr, 36);
1976         *p++ = cpu_to_be32(0);     /* Signal layout available */
1977         *p++ = cpu_to_be32(args->type);
1978         *p++ = cpu_to_be32(args->range.iomode);
1979         p = xdr_encode_hyper(p, args->range.offset);
1980         p = xdr_encode_hyper(p, args->range.length);
1981         p = xdr_encode_hyper(p, args->minlength);
1982         encode_nfs4_stateid(xdr, &args->stateid);
1983         encode_uint32(xdr, args->maxcount);
1984 
1985         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1986                 __func__,
1987                 args->type,
1988                 args->range.iomode,
1989                 (unsigned long)args->range.offset,
1990                 (unsigned long)args->range.length,
1991                 args->maxcount);
1992 }
1993 
1994 static int
1995 encode_layoutcommit(struct xdr_stream *xdr,
1996                     struct inode *inode,
1997                     const struct nfs4_layoutcommit_args *args,
1998                     struct compound_hdr *hdr)
1999 {
2000         __be32 *p;
2001 
2002         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2003                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2004 
2005         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2006         p = reserve_space(xdr, 20);
2007         /* Only whole file layouts */
2008         p = xdr_encode_hyper(p, 0); /* offset */
2009         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2010         *p = cpu_to_be32(0); /* reclaim */
2011         encode_nfs4_stateid(xdr, &args->stateid);
2012         if (args->lastbytewritten != U64_MAX) {
2013                 p = reserve_space(xdr, 20);
2014                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2015                 p = xdr_encode_hyper(p, args->lastbytewritten);
2016         } else {
2017                 p = reserve_space(xdr, 12);
2018                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2019         }
2020         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2021         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2022 
2023         encode_uint32(xdr, args->layoutupdate_len);
2024         if (args->layoutupdate_pages)
2025                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2026                                 args->layoutupdate_len);
2027 
2028         return 0;
2029 }
2030 
2031 static void
2032 encode_layoutreturn(struct xdr_stream *xdr,
2033                     const struct nfs4_layoutreturn_args *args,
2034                     struct compound_hdr *hdr)
2035 {
2036         __be32 *p;
2037 
2038         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039         p = reserve_space(xdr, 16);
2040         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2041         *p++ = cpu_to_be32(args->layout_type);
2042         *p++ = cpu_to_be32(args->range.iomode);
2043         *p = cpu_to_be32(RETURN_FILE);
2044         p = reserve_space(xdr, 16);
2045         p = xdr_encode_hyper(p, args->range.offset);
2046         p = xdr_encode_hyper(p, args->range.length);
2047         spin_lock(&args->inode->i_lock);
2048         encode_nfs4_stateid(xdr, &args->stateid);
2049         spin_unlock(&args->inode->i_lock);
2050         if (args->ld_private->ops && args->ld_private->ops->encode)
2051                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2052         else
2053                 encode_uint32(xdr, 0);
2054 }
2055 
2056 static int
2057 encode_secinfo_no_name(struct xdr_stream *xdr,
2058                        const struct nfs41_secinfo_no_name_args *args,
2059                        struct compound_hdr *hdr)
2060 {
2061         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2062         encode_uint32(xdr, args->style);
2063         return 0;
2064 }
2065 
2066 static void encode_test_stateid(struct xdr_stream *xdr,
2067                                 const struct nfs41_test_stateid_args *args,
2068                                 struct compound_hdr *hdr)
2069 {
2070         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2071         encode_uint32(xdr, 1);
2072         encode_nfs4_stateid(xdr, args->stateid);
2073 }
2074 
2075 static void encode_free_stateid(struct xdr_stream *xdr,
2076                                 const struct nfs41_free_stateid_args *args,
2077                                 struct compound_hdr *hdr)
2078 {
2079         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2080         encode_nfs4_stateid(xdr, &args->stateid);
2081 }
2082 #else
2083 static inline void
2084 encode_layoutreturn(struct xdr_stream *xdr,
2085                     const struct nfs4_layoutreturn_args *args,
2086                     struct compound_hdr *hdr)
2087 {
2088 }
2089 #endif /* CONFIG_NFS_V4_1 */
2090 
2091 /*
2092  * END OF "GENERIC" ENCODE ROUTINES.
2093  */
2094 
2095 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2096 {
2097 #if defined(CONFIG_NFS_V4_1)
2098         struct nfs4_session *session = args->sa_slot->table->session;
2099         if (session)
2100                 return session->clp->cl_mvops->minor_version;
2101 #endif /* CONFIG_NFS_V4_1 */
2102         return 0;
2103 }
2104 
2105 /*
2106  * Encode an ACCESS request
2107  */
2108 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2109                                 const void *data)
2110 {
2111         const struct nfs4_accessargs *args = data;
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115 
2116         encode_compound_hdr(xdr, req, &hdr);
2117         encode_sequence(xdr, &args->seq_args, &hdr);
2118         encode_putfh(xdr, args->fh, &hdr);
2119         encode_access(xdr, args->access, &hdr);
2120         encode_getfattr(xdr, args->bitmask, &hdr);
2121         encode_nops(&hdr);
2122 }
2123 
2124 /*
2125  * Encode LOOKUP request
2126  */
2127 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2128                                 const void *data)
2129 {
2130         const struct nfs4_lookup_arg *args = data;
2131         struct compound_hdr hdr = {
2132                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133         };
2134 
2135         encode_compound_hdr(xdr, req, &hdr);
2136         encode_sequence(xdr, &args->seq_args, &hdr);
2137         encode_putfh(xdr, args->dir_fh, &hdr);
2138         encode_lookup(xdr, args->name, &hdr);
2139         encode_getfh(xdr, &hdr);
2140         encode_getfattr(xdr, args->bitmask, &hdr);
2141         encode_nops(&hdr);
2142 }
2143 
2144 /*
2145  * Encode LOOKUPP request
2146  */
2147 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2148                 const void *data)
2149 {
2150         const struct nfs4_lookupp_arg *args = data;
2151         struct compound_hdr hdr = {
2152                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153         };
2154 
2155         encode_compound_hdr(xdr, req, &hdr);
2156         encode_sequence(xdr, &args->seq_args, &hdr);
2157         encode_putfh(xdr, args->fh, &hdr);
2158         encode_lookupp(xdr, &hdr);
2159         encode_getfh(xdr, &hdr);
2160         encode_getfattr(xdr, args->bitmask, &hdr);
2161         encode_nops(&hdr);
2162 }
2163 
2164 /*
2165  * Encode LOOKUP_ROOT request
2166  */
2167 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2168                                      struct xdr_stream *xdr,
2169                                      const void *data)
2170 {
2171         const struct nfs4_lookup_root_arg *args = data;
2172         struct compound_hdr hdr = {
2173                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2174         };
2175 
2176         encode_compound_hdr(xdr, req, &hdr);
2177         encode_sequence(xdr, &args->seq_args, &hdr);
2178         encode_putrootfh(xdr, &hdr);
2179         encode_getfh(xdr, &hdr);
2180         encode_getfattr(xdr, args->bitmask, &hdr);
2181         encode_nops(&hdr);
2182 }
2183 
2184 /*
2185  * Encode REMOVE request
2186  */
2187 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2188                                 const void *data)
2189 {
2190         const struct nfs_removeargs *args = data;
2191         struct compound_hdr hdr = {
2192                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193         };
2194 
2195         encode_compound_hdr(xdr, req, &hdr);
2196         encode_sequence(xdr, &args->seq_args, &hdr);
2197         encode_putfh(xdr, args->fh, &hdr);
2198         encode_remove(xdr, &args->name, &hdr);
2199         encode_nops(&hdr);
2200 }
2201 
2202 /*
2203  * Encode RENAME request
2204  */
2205 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2206                                 const void *data)
2207 {
2208         const struct nfs_renameargs *args = data;
2209         struct compound_hdr hdr = {
2210                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211         };
2212 
2213         encode_compound_hdr(xdr, req, &hdr);
2214         encode_sequence(xdr, &args->seq_args, &hdr);
2215         encode_putfh(xdr, args->old_dir, &hdr);
2216         encode_savefh(xdr, &hdr);
2217         encode_putfh(xdr, args->new_dir, &hdr);
2218         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2219         encode_nops(&hdr);
2220 }
2221 
2222 /*
2223  * Encode LINK request
2224  */
2225 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                               const void *data)
2227 {
2228         const struct nfs4_link_arg *args = data;
2229         struct compound_hdr hdr = {
2230                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231         };
2232 
2233         encode_compound_hdr(xdr, req, &hdr);
2234         encode_sequence(xdr, &args->seq_args, &hdr);
2235         encode_putfh(xdr, args->fh, &hdr);
2236         encode_savefh(xdr, &hdr);
2237         encode_putfh(xdr, args->dir_fh, &hdr);
2238         encode_link(xdr, args->name, &hdr);
2239         encode_restorefh(xdr, &hdr);
2240         encode_getfattr(xdr, args->bitmask, &hdr);
2241         encode_nops(&hdr);
2242 }
2243 
2244 /*
2245  * Encode CREATE request
2246  */
2247 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2248                                 const void *data)
2249 {
2250         const struct nfs4_create_arg *args = data;
2251         struct compound_hdr hdr = {
2252                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2253         };
2254 
2255         encode_compound_hdr(xdr, req, &hdr);
2256         encode_sequence(xdr, &args->seq_args, &hdr);
2257         encode_putfh(xdr, args->dir_fh, &hdr);
2258         encode_create(xdr, args, &hdr);
2259         encode_getfh(xdr, &hdr);
2260         encode_getfattr(xdr, args->bitmask, &hdr);
2261         encode_nops(&hdr);
2262 }
2263 
2264 /*
2265  * Encode SYMLINK request
2266  */
2267 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2268                                  const void *data)
2269 {
2270         const struct nfs4_create_arg *args = data;
2271 
2272         nfs4_xdr_enc_create(req, xdr, args);
2273 }
2274 
2275 /*
2276  * Encode GETATTR request
2277  */
2278 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2279                                  const void *data)
2280 {
2281         const struct nfs4_getattr_arg *args = data;
2282         struct compound_hdr hdr = {
2283                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284         };
2285 
2286         encode_compound_hdr(xdr, req, &hdr);
2287         encode_sequence(xdr, &args->seq_args, &hdr);
2288         encode_putfh(xdr, args->fh, &hdr);
2289         encode_getfattr(xdr, args->bitmask, &hdr);
2290         encode_nops(&hdr);
2291 }
2292 
2293 /*
2294  * Encode a CLOSE request
2295  */
2296 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2297                                const void *data)
2298 {
2299         const struct nfs_closeargs *args = data;
2300         struct compound_hdr hdr = {
2301                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2302         };
2303 
2304         encode_compound_hdr(xdr, req, &hdr);
2305         encode_sequence(xdr, &args->seq_args, &hdr);
2306         encode_putfh(xdr, args->fh, &hdr);
2307         if (args->lr_args)
2308                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2309         if (args->bitmask != NULL)
2310                 encode_getfattr(xdr, args->bitmask, &hdr);
2311         encode_close(xdr, args, &hdr);
2312         encode_nops(&hdr);
2313 }
2314 
2315 /*
2316  * Encode an OPEN request
2317  */
2318 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2319                               const void *data)
2320 {
2321         const struct nfs_openargs *args = data;
2322         struct compound_hdr hdr = {
2323                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2324         };
2325 
2326         encode_compound_hdr(xdr, req, &hdr);
2327         encode_sequence(xdr, &args->seq_args, &hdr);
2328         encode_putfh(xdr, args->fh, &hdr);
2329         encode_open(xdr, args, &hdr);
2330         encode_getfh(xdr, &hdr);
2331         if (args->access)
2332                 encode_access(xdr, args->access, &hdr);
2333         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2334         encode_nops(&hdr);
2335 }
2336 
2337 /*
2338  * Encode an OPEN_CONFIRM request
2339  */
2340 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2341                                       struct xdr_stream *xdr,
2342                                       const void *data)
2343 {
2344         const struct nfs_open_confirmargs *args = data;
2345         struct compound_hdr hdr = {
2346                 .nops   = 0,
2347         };
2348 
2349         encode_compound_hdr(xdr, req, &hdr);
2350         encode_putfh(xdr, args->fh, &hdr);
2351         encode_open_confirm(xdr, args, &hdr);
2352         encode_nops(&hdr);
2353 }
2354 
2355 /*
2356  * Encode an OPEN request with no attributes.
2357  */
2358 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2359                                      struct xdr_stream *xdr,
2360                                      const void *data)
2361 {
2362         const struct nfs_openargs *args = data;
2363         struct compound_hdr hdr = {
2364                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365         };
2366 
2367         encode_compound_hdr(xdr, req, &hdr);
2368         encode_sequence(xdr, &args->seq_args, &hdr);
2369         encode_putfh(xdr, args->fh, &hdr);
2370         encode_open(xdr, args, &hdr);
2371         if (args->access)
2372                 encode_access(xdr, args->access, &hdr);
2373         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2374         encode_nops(&hdr);
2375 }
2376 
2377 /*
2378  * Encode an OPEN_DOWNGRADE request
2379  */
2380 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2381                                         struct xdr_stream *xdr,
2382                                         const void *data)
2383 {
2384         const struct nfs_closeargs *args = data;
2385         struct compound_hdr hdr = {
2386                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387         };
2388 
2389         encode_compound_hdr(xdr, req, &hdr);
2390         encode_sequence(xdr, &args->seq_args, &hdr);
2391         encode_putfh(xdr, args->fh, &hdr);
2392         if (args->lr_args)
2393                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2394         encode_open_downgrade(xdr, args, &hdr);
2395         encode_nops(&hdr);
2396 }
2397 
2398 /*
2399  * Encode a LOCK request
2400  */
2401 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2402                               const void *data)
2403 {
2404         const struct nfs_lock_args *args = data;
2405         struct compound_hdr hdr = {
2406                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407         };
2408 
2409         encode_compound_hdr(xdr, req, &hdr);
2410         encode_sequence(xdr, &args->seq_args, &hdr);
2411         encode_putfh(xdr, args->fh, &hdr);
2412         encode_lock(xdr, args, &hdr);
2413         encode_nops(&hdr);
2414 }
2415 
2416 /*
2417  * Encode a LOCKT request
2418  */
2419 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2420                                const void *data)
2421 {
2422         const struct nfs_lockt_args *args = data;
2423         struct compound_hdr hdr = {
2424                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425         };
2426 
2427         encode_compound_hdr(xdr, req, &hdr);
2428         encode_sequence(xdr, &args->seq_args, &hdr);
2429         encode_putfh(xdr, args->fh, &hdr);
2430         encode_lockt(xdr, args, &hdr);
2431         encode_nops(&hdr);
2432 }
2433 
2434 /*
2435  * Encode a LOCKU request
2436  */
2437 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2438                                const void *data)
2439 {
2440         const struct nfs_locku_args *args = data;
2441         struct compound_hdr hdr = {
2442                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443         };
2444 
2445         encode_compound_hdr(xdr, req, &hdr);
2446         encode_sequence(xdr, &args->seq_args, &hdr);
2447         encode_putfh(xdr, args->fh, &hdr);
2448         encode_locku(xdr, args, &hdr);
2449         encode_nops(&hdr);
2450 }
2451 
2452 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2453                                            struct xdr_stream *xdr,
2454                                            const void *data)
2455 {
2456         const struct nfs_release_lockowner_args *args = data;
2457         struct compound_hdr hdr = {
2458                 .minorversion = 0,
2459         };
2460 
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2463         encode_nops(&hdr);
2464 }
2465 
2466 /*
2467  * Encode a READLINK request
2468  */
2469 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2470                                   const void *data)
2471 {
2472         const struct nfs4_readlink *args = data;
2473         struct compound_hdr hdr = {
2474                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475         };
2476 
2477         encode_compound_hdr(xdr, req, &hdr);
2478         encode_sequence(xdr, &args->seq_args, &hdr);
2479         encode_putfh(xdr, args->fh, &hdr);
2480         encode_readlink(xdr, args, req, &hdr);
2481 
2482         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2483                         args->pgbase, args->pglen);
2484         encode_nops(&hdr);
2485 }
2486 
2487 /*
2488  * Encode a READDIR request
2489  */
2490 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2491                                  const void *data)
2492 {
2493         const struct nfs4_readdir_arg *args = data;
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497 
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_readdir(xdr, args, req, &hdr);
2502 
2503         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2504                          args->pgbase, args->count);
2505         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2506                         __func__, hdr.replen << 2, args->pages,
2507                         args->pgbase, args->count);
2508         encode_nops(&hdr);
2509 }
2510 
2511 /*
2512  * Encode a READ request
2513  */
2514 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2515                               const void *data)
2516 {
2517         const struct nfs_pgio_args *args = data;
2518         struct compound_hdr hdr = {
2519                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520         };
2521 
2522         encode_compound_hdr(xdr, req, &hdr);
2523         encode_sequence(xdr, &args->seq_args, &hdr);
2524         encode_putfh(xdr, args->fh, &hdr);
2525         encode_read(xdr, args, &hdr);
2526 
2527         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2528                          args->pages, args->pgbase, args->count);
2529         req->rq_rcv_buf.flags |= XDRBUF_READ;
2530         encode_nops(&hdr);
2531 }
2532 
2533 /*
2534  * Encode an SETATTR request
2535  */
2536 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2537                                  const void *data)
2538 {
2539         const struct nfs_setattrargs *args = data;
2540         struct compound_hdr hdr = {
2541                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2542         };
2543 
2544         encode_compound_hdr(xdr, req, &hdr);
2545         encode_sequence(xdr, &args->seq_args, &hdr);
2546         encode_putfh(xdr, args->fh, &hdr);
2547         encode_setattr(xdr, args, args->server, &hdr);
2548         encode_getfattr(xdr, args->bitmask, &hdr);
2549         encode_nops(&hdr);
2550 }
2551 
2552 /*
2553  * Encode a GETACL request
2554  */
2555 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                 const void *data)
2557 {
2558         const struct nfs_getaclargs *args = data;
2559         struct compound_hdr hdr = {
2560                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561         };
2562         uint32_t replen;
2563 
2564         encode_compound_hdr(xdr, req, &hdr);
2565         encode_sequence(xdr, &args->seq_args, &hdr);
2566         encode_putfh(xdr, args->fh, &hdr);
2567         replen = hdr.replen + op_decode_hdr_maxsz;
2568         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2569 
2570         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2571                 args->acl_pages, 0, args->acl_len);
2572 
2573         encode_nops(&hdr);
2574 }
2575 
2576 /*
2577  * Encode a WRITE request
2578  */
2579 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2580                                const void *data)
2581 {
2582         const struct nfs_pgio_args *args = data;
2583         struct compound_hdr hdr = {
2584                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2585         };
2586 
2587         encode_compound_hdr(xdr, req, &hdr);
2588         encode_sequence(xdr, &args->seq_args, &hdr);
2589         encode_putfh(xdr, args->fh, &hdr);
2590         encode_write(xdr, args, &hdr);
2591         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2592         if (args->bitmask)
2593                 encode_getfattr(xdr, args->bitmask, &hdr);
2594         encode_nops(&hdr);
2595 }
2596 
2597 /*
2598  *  a COMMIT request
2599  */
2600 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2601                                 const void *data)
2602 {
2603         const struct nfs_commitargs *args = data;
2604         struct compound_hdr hdr = {
2605                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606         };
2607 
2608         encode_compound_hdr(xdr, req, &hdr);
2609         encode_sequence(xdr, &args->seq_args, &hdr);
2610         encode_putfh(xdr, args->fh, &hdr);
2611         encode_commit(xdr, args, &hdr);
2612         encode_nops(&hdr);
2613 }
2614 
2615 /*
2616  * FSINFO request
2617  */
2618 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2619                                 const void *data)
2620 {
2621         const struct nfs4_fsinfo_arg *args = data;
2622         struct compound_hdr hdr = {
2623                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624         };
2625 
2626         encode_compound_hdr(xdr, req, &hdr);
2627         encode_sequence(xdr, &args->seq_args, &hdr);
2628         encode_putfh(xdr, args->fh, &hdr);
2629         encode_fsinfo(xdr, args->bitmask, &hdr);
2630         encode_nops(&hdr);
2631 }
2632 
2633 /*
2634  * a PATHCONF request
2635  */
2636 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2637                                   const void *data)
2638 {
2639         const struct nfs4_pathconf_arg *args = data;
2640         struct compound_hdr hdr = {
2641                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2642         };
2643 
2644         encode_compound_hdr(xdr, req, &hdr);
2645         encode_sequence(xdr, &args->seq_args, &hdr);
2646         encode_putfh(xdr, args->fh, &hdr);
2647         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2648                            &hdr);
2649         encode_nops(&hdr);
2650 }
2651 
2652 /*
2653  * a STATFS request
2654  */
2655 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2656                                 const void *data)
2657 {
2658         const struct nfs4_statfs_arg *args = data;
2659         struct compound_hdr hdr = {
2660                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661         };
2662 
2663         encode_compound_hdr(xdr, req, &hdr);
2664         encode_sequence(xdr, &args->seq_args, &hdr);
2665         encode_putfh(xdr, args->fh, &hdr);
2666         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2667                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2668         encode_nops(&hdr);
2669 }
2670 
2671 /*
2672  * GETATTR_BITMAP request
2673  */
2674 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2675                                      struct xdr_stream *xdr,
2676                                      const void *data)
2677 {
2678         const struct nfs4_server_caps_arg *args = data;
2679         const u32 *bitmask = args->bitmask;
2680         struct compound_hdr hdr = {
2681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682         };
2683 
2684         encode_compound_hdr(xdr, req, &hdr);
2685         encode_sequence(xdr, &args->seq_args, &hdr);
2686         encode_putfh(xdr, args->fhandle, &hdr);
2687         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2688         encode_nops(&hdr);
2689 }
2690 
2691 /*
2692  * a RENEW request
2693  */
2694 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2695                                const void *data)
2696 
2697 {
2698         const struct nfs_client *clp = data;
2699         struct compound_hdr hdr = {
2700                 .nops   = 0,
2701         };
2702 
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_renew(xdr, clp->cl_clientid, &hdr);
2705         encode_nops(&hdr);
2706 }
2707 
2708 /*
2709  * a SETCLIENTID request
2710  */
2711 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2712                                      struct xdr_stream *xdr,
2713                                      const void *data)
2714 {
2715         const struct nfs4_setclientid *sc = data;
2716         struct compound_hdr hdr = {
2717                 .nops   = 0,
2718         };
2719 
2720         encode_compound_hdr(xdr, req, &hdr);
2721         encode_setclientid(xdr, sc, &hdr);
2722         encode_nops(&hdr);
2723 }
2724 
2725 /*
2726  * a SETCLIENTID_CONFIRM request
2727  */
2728 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2729                                              struct xdr_stream *xdr,
2730                                              const void *data)
2731 {
2732         const struct nfs4_setclientid_res *arg = data;
2733         struct compound_hdr hdr = {
2734                 .nops   = 0,
2735         };
2736 
2737         encode_compound_hdr(xdr, req, &hdr);
2738         encode_setclientid_confirm(xdr, arg, &hdr);
2739         encode_nops(&hdr);
2740 }
2741 
2742 /*
2743  * DELEGRETURN request
2744  */
2745 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2746                                      struct xdr_stream *xdr,
2747                                      const void *data)
2748 {
2749         const struct nfs4_delegreturnargs *args = data;
2750         struct compound_hdr hdr = {
2751                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2752         };
2753 
2754         encode_compound_hdr(xdr, req, &hdr);
2755         encode_sequence(xdr, &args->seq_args, &hdr);
2756         encode_putfh(xdr, args->fhandle, &hdr);
2757         if (args->lr_args)
2758                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2759         if (args->bitmask)
2760                 encode_getfattr(xdr, args->bitmask, &hdr);
2761         encode_delegreturn(xdr, args->stateid, &hdr);
2762         encode_nops(&hdr);
2763 }
2764 
2765 /*
2766  * Encode FS_LOCATIONS request
2767  */
2768 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2769                                       struct xdr_stream *xdr,
2770                                       const void *data)
2771 {
2772         const struct nfs4_fs_locations_arg *args = data;
2773         struct compound_hdr hdr = {
2774                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775         };
2776         uint32_t replen;
2777 
2778         encode_compound_hdr(xdr, req, &hdr);
2779         encode_sequence(xdr, &args->seq_args, &hdr);
2780         if (args->migration) {
2781                 encode_putfh(xdr, args->fh, &hdr);
2782                 replen = hdr.replen;
2783                 encode_fs_locations(xdr, args->bitmask, &hdr);
2784                 if (args->renew)
2785                         encode_renew(xdr, args->clientid, &hdr);
2786         } else {
2787                 encode_putfh(xdr, args->dir_fh, &hdr);
2788                 encode_lookup(xdr, args->name, &hdr);
2789                 replen = hdr.replen;
2790                 encode_fs_locations(xdr, args->bitmask, &hdr);
2791         }
2792 
2793         /* Set up reply kvec to capture returned fs_locations array. */
2794         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2795                          (struct page **)&args->page, 0, PAGE_SIZE);
2796         encode_nops(&hdr);
2797 }
2798 
2799 /*
2800  * Encode SECINFO request
2801  */
2802 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2803                                 struct xdr_stream *xdr,
2804                                 const void *data)
2805 {
2806         const struct nfs4_secinfo_arg *args = data;
2807         struct compound_hdr hdr = {
2808                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2809         };
2810 
2811         encode_compound_hdr(xdr, req, &hdr);
2812         encode_sequence(xdr, &args->seq_args, &hdr);
2813         encode_putfh(xdr, args->dir_fh, &hdr);
2814         encode_secinfo(xdr, args->name, &hdr);
2815         encode_nops(&hdr);
2816 }
2817 
2818 /*
2819  * Encode FSID_PRESENT request
2820  */
2821 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2822                                       struct xdr_stream *xdr,
2823                                       const void *data)
2824 {
2825         const struct nfs4_fsid_present_arg *args = data;
2826         struct compound_hdr hdr = {
2827                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2828         };
2829 
2830         encode_compound_hdr(xdr, req, &hdr);
2831         encode_sequence(xdr, &args->seq_args, &hdr);
2832         encode_putfh(xdr, args->fh, &hdr);
2833         encode_getfh(xdr, &hdr);
2834         if (args->renew)
2835                 encode_renew(xdr, args->clientid, &hdr);
2836         encode_nops(&hdr);
2837 }
2838 
2839 #if defined(CONFIG_NFS_V4_1)
2840 /*
2841  * BIND_CONN_TO_SESSION request
2842  */
2843 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2844                                 struct xdr_stream *xdr,
2845                                 const void *data)
2846 {
2847         const struct nfs41_bind_conn_to_session_args *args = data;
2848         struct compound_hdr hdr = {
2849                 .minorversion = args->client->cl_mvops->minor_version,
2850         };
2851 
2852         encode_compound_hdr(xdr, req, &hdr);
2853         encode_bind_conn_to_session(xdr, args, &hdr);
2854         encode_nops(&hdr);
2855 }
2856 
2857 /*
2858  * EXCHANGE_ID request
2859  */
2860 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2861                                      struct xdr_stream *xdr,
2862                                      const void *data)
2863 {
2864         const struct nfs41_exchange_id_args *args = data;
2865         struct compound_hdr hdr = {
2866                 .minorversion = args->client->cl_mvops->minor_version,
2867         };
2868 
2869         encode_compound_hdr(xdr, req, &hdr);
2870         encode_exchange_id(xdr, args, &hdr);
2871         encode_nops(&hdr);
2872 }
2873 
2874 /*
2875  * a CREATE_SESSION request
2876  */
2877 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2878                                         struct xdr_stream *xdr,
2879                                         const void *data)
2880 {
2881         const struct nfs41_create_session_args *args = data;
2882         struct compound_hdr hdr = {
2883                 .minorversion = args->client->cl_mvops->minor_version,
2884         };
2885 
2886         encode_compound_hdr(xdr, req, &hdr);
2887         encode_create_session(xdr, args, &hdr);
2888         encode_nops(&hdr);
2889 }
2890 
2891 /*
2892  * a DESTROY_SESSION request
2893  */
2894 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2895                                          struct xdr_stream *xdr,
2896                                          const void *data)
2897 {
2898         const struct nfs4_session *session = data;
2899         struct compound_hdr hdr = {
2900                 .minorversion = session->clp->cl_mvops->minor_version,
2901         };
2902 
2903         encode_compound_hdr(xdr, req, &hdr);
2904         encode_destroy_session(xdr, session, &hdr);
2905         encode_nops(&hdr);
2906 }
2907 
2908 /*
2909  * a DESTROY_CLIENTID request
2910  */
2911 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2912                                          struct xdr_stream *xdr,
2913                                          const void *data)
2914 {
2915         const struct nfs_client *clp = data;
2916         struct compound_hdr hdr = {
2917                 .minorversion = clp->cl_mvops->minor_version,
2918         };
2919 
2920         encode_compound_hdr(xdr, req, &hdr);
2921         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2922         encode_nops(&hdr);
2923 }
2924 
2925 /*
2926  * a SEQUENCE request
2927  */
2928 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2929                                   const void *data)
2930 {
2931         const struct nfs4_sequence_args *args = data;
2932         struct compound_hdr hdr = {
2933                 .minorversion = nfs4_xdr_minorversion(args),
2934         };
2935 
2936         encode_compound_hdr(xdr, req, &hdr);
2937         encode_sequence(xdr, args, &hdr);
2938         encode_nops(&hdr);
2939 }
2940 
2941 /*
2942  * a GET_LEASE_TIME request
2943  */
2944 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2945                                         struct xdr_stream *xdr,
2946                                         const void *data)
2947 {
2948         const struct nfs4_get_lease_time_args *args = data;
2949         struct compound_hdr hdr = {
2950                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2951         };
2952         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2953 
2954         encode_compound_hdr(xdr, req, &hdr);
2955         encode_sequence(xdr, &args->la_seq_args, &hdr);
2956         encode_putrootfh(xdr, &hdr);
2957         encode_fsinfo(xdr, lease_bitmap, &hdr);
2958         encode_nops(&hdr);
2959 }
2960 
2961 /*
2962  * a RECLAIM_COMPLETE request
2963  */
2964 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2965                                           struct xdr_stream *xdr,
2966                                           const void *data)
2967 {
2968         const struct nfs41_reclaim_complete_args *args = data;
2969         struct compound_hdr hdr = {
2970                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2971         };
2972 
2973         encode_compound_hdr(xdr, req, &hdr);
2974         encode_sequence(xdr, &args->seq_args, &hdr);
2975         encode_reclaim_complete(xdr, args, &hdr);
2976         encode_nops(&hdr);
2977 }
2978 
2979 /*
2980  * Encode GETDEVICEINFO request
2981  */
2982 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2983                                        struct xdr_stream *xdr,
2984                                        const void *data)
2985 {
2986         const struct nfs4_getdeviceinfo_args *args = data;
2987         struct compound_hdr hdr = {
2988                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989         };
2990 
2991         encode_compound_hdr(xdr, req, &hdr);
2992         encode_sequence(xdr, &args->seq_args, &hdr);
2993         encode_getdeviceinfo(xdr, args, &hdr);
2994 
2995         /* set up reply kvec. Subtract notification bitmap max size (2)
2996          * so that notification bitmap is put in xdr_buf tail */
2997         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2998                          args->pdev->pages, args->pdev->pgbase,
2999                          args->pdev->pglen);
3000 
3001         encode_nops(&hdr);
3002 }
3003 
3004 /*
3005  *  Encode LAYOUTGET request
3006  */
3007 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3008                                    struct xdr_stream *xdr,
3009                                    const void *data)
3010 {
3011         const struct nfs4_layoutget_args *args = data;
3012         struct compound_hdr hdr = {
3013                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014         };
3015 
3016         encode_compound_hdr(xdr, req, &hdr);
3017         encode_sequence(xdr, &args->seq_args, &hdr);
3018         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3019         encode_layoutget(xdr, args, &hdr);
3020 
3021         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3022             args->layout.pages, 0, args->layout.pglen);
3023 
3024         encode_nops(&hdr);
3025 }
3026 
3027 /*
3028  *  Encode LAYOUTCOMMIT request
3029  */
3030 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3031                                       struct xdr_stream *xdr,
3032                                       const void *priv)
3033 {
3034         const struct nfs4_layoutcommit_args *args = priv;
3035         struct nfs4_layoutcommit_data *data =
3036                 container_of(args, struct nfs4_layoutcommit_data, args);
3037         struct compound_hdr hdr = {
3038                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3039         };
3040 
3041         encode_compound_hdr(xdr, req, &hdr);
3042         encode_sequence(xdr, &args->seq_args, &hdr);
3043         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3044         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3045         encode_getfattr(xdr, args->bitmask, &hdr);
3046         encode_nops(&hdr);
3047 }
3048 
3049 /*
3050  * Encode LAYOUTRETURN request
3051  */
3052 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3053                                       struct xdr_stream *xdr,
3054                                       const void *data)
3055 {
3056         const struct nfs4_layoutreturn_args *args = data;
3057         struct compound_hdr hdr = {
3058                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3059         };
3060 
3061         encode_compound_hdr(xdr, req, &hdr);
3062         encode_sequence(xdr, &args->seq_args, &hdr);
3063         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3064         encode_layoutreturn(xdr, args, &hdr);
3065         encode_nops(&hdr);
3066 }
3067 
3068 /*
3069  * Encode SECINFO_NO_NAME request
3070  */
3071 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3072                                         struct xdr_stream *xdr,
3073                                         const void *data)
3074 {
3075         const struct nfs41_secinfo_no_name_args *args = data;
3076         struct compound_hdr hdr = {
3077                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078         };
3079 
3080         encode_compound_hdr(xdr, req, &hdr);
3081         encode_sequence(xdr, &args->seq_args, &hdr);
3082         encode_putrootfh(xdr, &hdr);
3083         encode_secinfo_no_name(xdr, args, &hdr);
3084         encode_nops(&hdr);
3085 }
3086 
3087 /*
3088  *  Encode TEST_STATEID request
3089  */
3090 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3091                                       struct xdr_stream *xdr,
3092                                       const void *data)
3093 {
3094         const struct nfs41_test_stateid_args *args = data;
3095         struct compound_hdr hdr = {
3096                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097         };
3098 
3099         encode_compound_hdr(xdr, req, &hdr);
3100         encode_sequence(xdr, &args->seq_args, &hdr);
3101         encode_test_stateid(xdr, args, &hdr);
3102         encode_nops(&hdr);
3103 }
3104 
3105 /*
3106  *  Encode FREE_STATEID request
3107  */
3108 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3109                                      struct xdr_stream *xdr,
3110                                      const void *data)
3111 {
3112         const struct nfs41_free_stateid_args *args = data;
3113         struct compound_hdr hdr = {
3114                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3115         };
3116 
3117         encode_compound_hdr(xdr, req, &hdr);
3118         encode_sequence(xdr, &args->seq_args, &hdr);
3119         encode_free_stateid(xdr, args, &hdr);
3120         encode_nops(&hdr);
3121 }
3122 #endif /* CONFIG_NFS_V4_1 */
3123 
3124 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3125 {
3126         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3127                 "Remaining buffer length is %tu words.\n",
3128                 func, xdr->end - xdr->p);
3129 }
3130 
3131 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3132 {
3133         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3134                         NFS4_OPAQUE_LIMIT);
3135         if (unlikely(ret < 0)) {
3136                 if (ret == -EBADMSG)
3137                         print_overflow_msg(__func__, xdr);
3138                 return -EIO;
3139         }
3140         *len = ret;
3141         return 0;
3142 }
3143 
3144 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3145 {
3146         __be32 *p;
3147 
3148         p = xdr_inline_decode(xdr, 8);
3149         if (unlikely(!p))
3150                 goto out_overflow;
3151         hdr->status = be32_to_cpup(p++);
3152         hdr->taglen = be32_to_cpup(p);
3153 
3154         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3155         if (unlikely(!p))
3156                 goto out_overflow;
3157         hdr->tag = (char *)p;
3158         p += XDR_QUADLEN(hdr->taglen);
3159         hdr->nops = be32_to_cpup(p);
3160         if (unlikely(hdr->nops < 1))
3161                 return nfs4_stat_to_errno(hdr->status);
3162         return 0;
3163 out_overflow:
3164         print_overflow_msg(__func__, xdr);
3165         return -EIO;
3166 }
3167 
3168 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3169                 int *nfs_retval)
3170 {
3171         __be32 *p;
3172         uint32_t opnum;
3173         int32_t nfserr;
3174 
3175         p = xdr_inline_decode(xdr, 8);
3176         if (unlikely(!p))
3177                 goto out_overflow;
3178         opnum = be32_to_cpup(p++);
3179         if (unlikely(opnum != expected))
3180                 goto out_bad_operation;
3181         nfserr = be32_to_cpup(p);
3182         if (nfserr == NFS_OK)
3183                 *nfs_retval = 0;
3184         else
3185                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3186         return true;
3187 out_bad_operation:
3188         dprintk("nfs: Server returned operation"
3189                 " %d but we issued a request for %d\n",
3190                         opnum, expected);
3191         *nfs_retval = -EREMOTEIO;
3192         return false;
3193 out_overflow:
3194         print_overflow_msg(__func__, xdr);
3195         *nfs_retval = -EIO;
3196         return false;
3197 }
3198 
3199 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3200 {
3201         int retval;
3202 
3203         __decode_op_hdr(xdr, expected, &retval);
3204         return retval;
3205 }
3206 
3207 /* Dummy routine */
3208 static int decode_ace(struct xdr_stream *xdr, void *ace)
3209 {
3210         __be32 *p;
3211         unsigned int strlen;
3212         char *str;
3213 
3214         p = xdr_inline_decode(xdr, 12);
3215         if (likely(p))
3216                 return decode_opaque_inline(xdr, &strlen, &str);
3217         print_overflow_msg(__func__, xdr);
3218         return -EIO;
3219 }
3220 
3221 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3222 {
3223         uint32_t bmlen;
3224         __be32 *p;
3225 
3226         p = xdr_inline_decode(xdr, 4);
3227         if (unlikely(!p))
3228                 goto out_overflow;
3229         bmlen = be32_to_cpup(p);
3230 
3231         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3232         p = xdr_inline_decode(xdr, (bmlen << 2));
3233         if (unlikely(!p))
3234                 goto out_overflow;
3235         if (bmlen > 0) {
3236                 bitmap[0] = be32_to_cpup(p++);
3237                 if (bmlen > 1) {
3238                         bitmap[1] = be32_to_cpup(p++);
3239                         if (bmlen > 2)
3240                                 bitmap[2] = be32_to_cpup(p);
3241                 }
3242         }
3243         return 0;
3244 out_overflow:
3245         print_overflow_msg(__func__, xdr);
3246         return -EIO;
3247 }
3248 
3249 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3250 {
3251         __be32 *p;
3252 
3253         p = xdr_inline_decode(xdr, 4);
3254         if (unlikely(!p))
3255                 goto out_overflow;
3256         *attrlen = be32_to_cpup(p);
3257         *savep = xdr_stream_pos(xdr);
3258         return 0;
3259 out_overflow:
3260         print_overflow_msg(__func__, xdr);
3261         return -EIO;
3262 }
3263 
3264 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3265 {
3266         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3267                 int ret;
3268                 ret = decode_attr_bitmap(xdr, bitmask);
3269                 if (unlikely(ret < 0))
3270                         return ret;
3271                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3272         } else
3273                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3274         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3275                 bitmask[0], bitmask[1], bitmask[2]);
3276         return 0;
3277 }
3278 
3279 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3280 {
3281         __be32 *p;
3282         int ret = 0;
3283 
3284         *type = 0;
3285         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3286                 return -EIO;
3287         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3288                 p = xdr_inline_decode(xdr, 4);
3289                 if (unlikely(!p))
3290                         goto out_overflow;
3291                 *type = be32_to_cpup(p);
3292                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3293                         dprintk("%s: bad type %d\n", __func__, *type);
3294                         return -EIO;
3295                 }
3296                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3297                 ret = NFS_ATTR_FATTR_TYPE;
3298         }
3299         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3300         return ret;
3301 out_overflow:
3302         print_overflow_msg(__func__, xdr);
3303         return -EIO;
3304 }
3305 
3306 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3307                                       uint32_t *bitmap, uint32_t *type)
3308 {
3309         __be32 *p;
3310 
3311         *type = 0;
3312         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3313                 return -EIO;
3314         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3315                 p = xdr_inline_decode(xdr, 4);
3316                 if (unlikely(!p))
3317                         goto out_overflow;
3318                 *type = be32_to_cpup(p);
3319                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3320         }
3321         dprintk("%s: expire type=0x%x\n", __func__, *type);
3322         return 0;
3323 out_overflow:
3324         print_overflow_msg(__func__, xdr);
3325         return -EIO;
3326 }
3327 
3328 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3329 {
3330         __be32 *p;
3331         int ret = 0;
3332 
3333         *change = 0;
3334         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3335                 return -EIO;
3336         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3337                 p = xdr_inline_decode(xdr, 8);
3338                 if (unlikely(!p))
3339                         goto out_overflow;
3340                 xdr_decode_hyper(p, change);
3341                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3342                 ret = NFS_ATTR_FATTR_CHANGE;
3343         }
3344         dprintk("%s: change attribute=%Lu\n", __func__,
3345                         (unsigned long long)*change);
3346         return ret;
3347 out_overflow:
3348         print_overflow_msg(__func__, xdr);
3349         return -EIO;
3350 }
3351 
3352 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3353 {
3354         __be32 *p;
3355         int ret = 0;
3356 
3357         *size = 0;
3358         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3359                 return -EIO;
3360         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3361                 p = xdr_inline_decode(xdr, 8);
3362                 if (unlikely(!p))
3363                         goto out_overflow;
3364                 xdr_decode_hyper(p, size);
3365                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3366                 ret = NFS_ATTR_FATTR_SIZE;
3367         }
3368         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3369         return ret;
3370 out_overflow:
3371         print_overflow_msg(__func__, xdr);
3372         return -EIO;
3373 }
3374 
3375 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3376 {
3377         __be32 *p;
3378 
3379         *res = 0;
3380         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3381                 return -EIO;
3382         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3383                 p = xdr_inline_decode(xdr, 4);
3384                 if (unlikely(!p))
3385                         goto out_overflow;
3386                 *res = be32_to_cpup(p);
3387                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3388         }
3389         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3390         return 0;
3391 out_overflow:
3392         print_overflow_msg(__func__, xdr);
3393         return -EIO;
3394 }
3395 
3396 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3397 {
3398         __be32 *p;
3399 
3400         *res = 0;
3401         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3402                 return -EIO;
3403         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3404                 p = xdr_inline_decode(xdr, 4);
3405                 if (unlikely(!p))
3406                         goto out_overflow;
3407                 *res = be32_to_cpup(p);
3408                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3409         }
3410         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3411         return 0;
3412 out_overflow:
3413         print_overflow_msg(__func__, xdr);
3414         return -EIO;
3415 }
3416 
3417 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3418 {
3419         __be32 *p;
3420         int ret = 0;
3421 
3422         fsid->major = 0;
3423         fsid->minor = 0;
3424         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3425                 return -EIO;
3426         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3427                 p = xdr_inline_decode(xdr, 16);
3428                 if (unlikely(!p))
3429                         goto out_overflow;
3430                 p = xdr_decode_hyper(p, &fsid->major);
3431                 xdr_decode_hyper(p, &fsid->minor);
3432                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3433                 ret = NFS_ATTR_FATTR_FSID;
3434         }
3435         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3436                         (unsigned long long)fsid->major,
3437                         (unsigned long long)fsid->minor);
3438         return ret;
3439 out_overflow:
3440         print_overflow_msg(__func__, xdr);
3441         return -EIO;
3442 }
3443 
3444 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3445 {
3446         __be32 *p;
3447 
3448         *res = 60;
3449         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3450                 return -EIO;
3451         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3452                 p = xdr_inline_decode(xdr, 4);
3453                 if (unlikely(!p))
3454                         goto out_overflow;
3455                 *res = be32_to_cpup(p);
3456                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3457         }
3458         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3459         return 0;
3460 out_overflow:
3461         print_overflow_msg(__func__, xdr);
3462         return -EIO;
3463 }
3464 
3465 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3466 {
3467         __be32 *p;
3468 
3469         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3472                 p = xdr_inline_decode(xdr, 4);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3476                 *res = -be32_to_cpup(p);
3477         }
3478         return 0;
3479 out_overflow:
3480         print_overflow_msg(__func__, xdr);
3481         return -EIO;
3482 }
3483 
3484 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3485                                  uint32_t *bitmap, uint32_t *bitmask)
3486 {
3487         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3488                 int ret;
3489                 ret = decode_attr_bitmap(xdr, bitmask);
3490                 if (unlikely(ret < 0))
3491                         return ret;
3492                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3493         } else
3494                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3495         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3496                 bitmask[0], bitmask[1], bitmask[2]);
3497         return 0;
3498 }
3499 
3500 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3501 {
3502         __be32 *p;
3503         int len;
3504 
3505         if (fh != NULL)
3506                 memset(fh, 0, sizeof(*fh));
3507 
3508         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3509                 return -EIO;
3510         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3511                 p = xdr_inline_decode(xdr, 4);
3512                 if (unlikely(!p))
3513                         goto out_overflow;
3514                 len = be32_to_cpup(p);
3515                 if (len > NFS4_FHSIZE)
3516                         return -EIO;
3517                 p = xdr_inline_decode(xdr, len);
3518                 if (unlikely(!p))
3519                         goto out_overflow;
3520                 if (fh != NULL) {
3521                         memcpy(fh->data, p, len);
3522                         fh->size = len;
3523                 }
3524                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3525         }
3526         return 0;
3527 out_overflow:
3528         print_overflow_msg(__func__, xdr);
3529         return -EIO;
3530 }
3531 
3532 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3533 {
3534         __be32 *p;
3535 
3536         *res = 0;
3537         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3538                 return -EIO;
3539         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3540                 p = xdr_inline_decode(xdr, 4);
3541                 if (unlikely(!p))
3542                         goto out_overflow;
3543                 *res = be32_to_cpup(p);
3544                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3545         }
3546         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3547         return 0;
3548 out_overflow:
3549         print_overflow_msg(__func__, xdr);
3550         return -EIO;
3551 }
3552 
3553 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3554 {
3555         __be32 *p;
3556         int ret = 0;
3557 
3558         *fileid = 0;
3559         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3560                 return -EIO;
3561         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3562                 p = xdr_inline_decode(xdr, 8);
3563                 if (unlikely(!p))
3564                         goto out_overflow;
3565                 xdr_decode_hyper(p, fileid);
3566                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3567                 ret = NFS_ATTR_FATTR_FILEID;
3568         }
3569         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3570         return ret;
3571 out_overflow:
3572         print_overflow_msg(__func__, xdr);
3573         return -EIO;
3574 }
3575 
3576 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3577 {
3578         __be32 *p;
3579         int ret = 0;
3580 
3581         *fileid = 0;
3582         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3583                 return -EIO;
3584         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3585                 p = xdr_inline_decode(xdr, 8);
3586                 if (unlikely(!p))
3587                         goto out_overflow;
3588                 xdr_decode_hyper(p, fileid);
3589                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3590                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3591         }
3592         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3593         return ret;
3594 out_overflow:
3595         print_overflow_msg(__func__, xdr);
3596         return -EIO;
3597 }
3598 
3599 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3600 {
3601         __be32 *p;
3602         int status = 0;
3603 
3604         *res = 0;
3605         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3606                 return -EIO;
3607         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3608                 p = xdr_inline_decode(xdr, 8);
3609                 if (unlikely(!p))
3610                         goto out_overflow;
3611                 xdr_decode_hyper(p, res);
3612                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3613         }
3614         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3615         return status;
3616 out_overflow:
3617         print_overflow_msg(__func__, xdr);
3618         return -EIO;
3619 }
3620 
3621 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3622 {
3623         __be32 *p;
3624         int status = 0;
3625 
3626         *res = 0;
3627         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3628                 return -EIO;
3629         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3630                 p = xdr_inline_decode(xdr, 8);
3631                 if (unlikely(!p))
3632                         goto out_overflow;
3633                 xdr_decode_hyper(p, res);
3634                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3635         }
3636         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3637         return status;
3638 out_overflow:
3639         print_overflow_msg(__func__, xdr);
3640         return -EIO;
3641 }
3642 
3643 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3644 {
3645         __be32 *p;
3646         int status = 0;
3647 
3648         *res = 0;
3649         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3650                 return -EIO;
3651         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3652                 p = xdr_inline_decode(xdr, 8);
3653                 if (unlikely(!p))
3654                         goto out_overflow;
3655                 xdr_decode_hyper(p, res);
3656                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3657         }
3658         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3659         return status;
3660 out_overflow:
3661         print_overflow_msg(__func__, xdr);
3662         return -EIO;
3663 }
3664 
3665 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3666 {
3667         u32 n;
3668         __be32 *p;
3669         int status = 0;
3670 
3671         p = xdr_inline_decode(xdr, 4);
3672         if (unlikely(!p))
3673                 goto out_overflow;
3674         n = be32_to_cpup(p);
3675         if (n == 0)
3676                 goto root_path;
3677         dprintk("pathname4: ");
3678         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3679                 dprintk("cannot parse %d components in path\n", n);
3680                 goto out_eio;
3681         }
3682         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3683                 struct nfs4_string *component = &path->components[path->ncomponents];
3684                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3685                 if (unlikely(status != 0))
3686                         goto out_eio;
3687                 ifdebug (XDR)
3688                         pr_cont("%s%.*s ",
3689                                 (path->ncomponents != n ? "/ " : ""),
3690                                 component->len, component->data);
3691         }
3692 out:
3693         return status;
3694 root_path:
3695 /* a root pathname is sent as a zero component4 */
3696         path->ncomponents = 1;
3697         path->components[0].len=0;
3698         path->components[0].data=NULL;
3699         dprintk("pathname4: /\n");
3700         goto out;
3701 out_eio:
3702         dprintk(" status %d", status);
3703         status = -EIO;
3704         goto out;
3705 out_overflow:
3706         print_overflow_msg(__func__, xdr);
3707         return -EIO;
3708 }
3709 
3710 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3711 {
3712         int n;
3713         __be32 *p;
3714         int status = -EIO;
3715 
3716         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3717                 goto out;
3718         status = 0;
3719         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3720                 goto out;
3721         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3722         status = -EIO;
3723         /* Ignore borken servers that return unrequested attrs */
3724         if (unlikely(res == NULL))
3725                 goto out;
3726         dprintk("%s: fsroot:\n", __func__);
3727         status = decode_pathname(xdr, &res->fs_path);
3728         if (unlikely(status != 0))
3729                 goto out;
3730         p = xdr_inline_decode(xdr, 4);
3731         if (unlikely(!p))
3732                 goto out_overflow;
3733         n = be32_to_cpup(p);
3734         if (n <= 0)
3735                 goto out_eio;
3736         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3737                 u32 m;
3738                 struct nfs4_fs_location *loc;
3739 
3740                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3741                         break;
3742                 loc = &res->locations[res->nlocations];
3743                 p = xdr_inline_decode(xdr, 4);
3744                 if (unlikely(!p))
3745                         goto out_overflow;
3746                 m = be32_to_cpup(p);
3747 
3748                 dprintk("%s: servers:\n", __func__);
3749                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3750                         struct nfs4_string *server;
3751 
3752                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3753                                 unsigned int i;
3754                                 dprintk("%s: using first %u of %u servers "
3755                                         "returned for location %u\n",
3756                                                 __func__,
3757                                                 NFS4_FS_LOCATION_MAXSERVERS,
3758                                                 m, res->nlocations);
3759                                 for (i = loc->nservers; i < m; i++) {
3760                                         unsigned int len;
3761                                         char *data;
3762                                         status = decode_opaque_inline(xdr, &len, &data);
3763                                         if (unlikely(status != 0))
3764                                                 goto out_eio;
3765                                 }
3766                                 break;
3767                         }
3768                         server = &loc->servers[loc->nservers];
3769                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3770                         if (unlikely(status != 0))
3771                                 goto out_eio;
3772                         dprintk("%s ", server->data);
3773                 }
3774                 status = decode_pathname(xdr, &loc->rootpath);
3775                 if (unlikely(status != 0))
3776                         goto out_eio;
3777         }
3778         if (res->nlocations != 0)
3779                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3780 out:
3781         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3782         return status;
3783 out_overflow:
3784         print_overflow_msg(__func__, xdr);
3785 out_eio:
3786         status = -EIO;
3787         goto out;
3788 }
3789 
3790 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3791 {
3792         __be32 *p;
3793         int status = 0;
3794 
3795         *res = 0;
3796         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3797                 return -EIO;
3798         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3799                 p = xdr_inline_decode(xdr, 8);
3800                 if (unlikely(!p))
3801                         goto out_overflow;
3802                 xdr_decode_hyper(p, res);
3803                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3804         }
3805         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3806         return status;
3807 out_overflow:
3808         print_overflow_msg(__func__, xdr);
3809         return -EIO;
3810 }
3811 
3812 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3813 {
3814         __be32 *p;
3815         int status = 0;
3816 
3817         *maxlink = 1;
3818         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3819                 return -EIO;
3820         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3821                 p = xdr_inline_decode(xdr, 4);
3822                 if (unlikely(!p))
3823                         goto out_overflow;
3824                 *maxlink = be32_to_cpup(p);
3825                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3826         }
3827         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3828         return status;
3829 out_overflow:
3830         print_overflow_msg(__func__, xdr);
3831         return -EIO;
3832 }
3833 
3834 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3835 {
3836         __be32 *p;
3837         int status = 0;
3838 
3839         *maxname = 1024;
3840         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3841                 return -EIO;
3842         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3843                 p = xdr_inline_decode(xdr, 4);
3844                 if (unlikely(!p))
3845                         goto out_overflow;
3846                 *maxname = be32_to_cpup(p);
3847                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3848         }
3849         dprintk("%s: maxname=%u\n", __func__, *maxname);
3850         return status;
3851 out_overflow:
3852         print_overflow_msg(__func__, xdr);
3853         return -EIO;
3854 }
3855 
3856 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3857 {
3858         __be32 *p;
3859         int status = 0;
3860 
3861         *res = 1024;
3862         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3863                 return -EIO;
3864         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3865                 uint64_t maxread;
3866                 p = xdr_inline_decode(xdr, 8);
3867                 if (unlikely(!p))
3868                         goto out_overflow;
3869                 xdr_decode_hyper(p, &maxread);
3870                 if (maxread > 0x7FFFFFFF)
3871                         maxread = 0x7FFFFFFF;
3872                 *res = (uint32_t)maxread;
3873                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3874         }
3875         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3876         return status;
3877 out_overflow:
3878         print_overflow_msg(__func__, xdr);
3879         return -EIO;
3880 }
3881 
3882 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3883 {
3884         __be32 *p;
3885         int status = 0;
3886 
3887         *res = 1024;
3888         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3889                 return -EIO;
3890         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3891                 uint64_t maxwrite;
3892                 p = xdr_inline_decode(xdr, 8);
3893                 if (unlikely(!p))
3894                         goto out_overflow;
3895                 xdr_decode_hyper(p, &maxwrite);
3896                 if (maxwrite > 0x7FFFFFFF)
3897                         maxwrite = 0x7FFFFFFF;
3898                 *res = (uint32_t)maxwrite;
3899                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3900         }
3901         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3902         return status;
3903 out_overflow:
3904         print_overflow_msg(__func__, xdr);
3905         return -EIO;
3906 }
3907 
3908 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3909 {
3910         uint32_t tmp;
3911         __be32 *p;
3912         int ret = 0;
3913 
3914         *mode = 0;
3915         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3916                 return -EIO;
3917         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3918                 p = xdr_inline_decode(xdr, 4);
3919                 if (unlikely(!p))
3920                         goto out_overflow;
3921                 tmp = be32_to_cpup(p);
3922                 *mode = tmp & ~S_IFMT;
3923                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3924                 ret = NFS_ATTR_FATTR_MODE;
3925         }
3926         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3927         return ret;
3928 out_overflow:
3929         print_overflow_msg(__func__, xdr);
3930         return -EIO;
3931 }
3932 
3933 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3934 {
3935         __be32 *p;
3936         int ret = 0;
3937 
3938         *nlink = 1;
3939         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3940                 return -EIO;
3941         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3942                 p = xdr_inline_decode(xdr, 4);
3943                 if (unlikely(!p))
3944                         goto out_overflow;
3945                 *nlink = be32_to_cpup(p);
3946                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3947                 ret = NFS_ATTR_FATTR_NLINK;
3948         }
3949         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3950         return ret;
3951 out_overflow:
3952         print_overflow_msg(__func__, xdr);
3953         return -EIO;
3954 }
3955 
3956 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3957                 struct nfs4_string *name, gfp_t gfp_flags)
3958 {
3959         ssize_t ret;
3960 
3961         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3962                         XDR_MAX_NETOBJ, gfp_flags);
3963         name->len = 0;
3964         if (ret > 0)
3965                 name->len = ret;
3966         return ret;
3967 }
3968 
3969 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3970                 const struct nfs_server *server, kuid_t *uid,
3971                 struct nfs4_string *owner_name)
3972 {
3973         ssize_t len;
3974         char *p;
3975 
3976         *uid = make_kuid(&init_user_ns, -2);
3977         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3978                 return -EIO;
3979         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3980                 return 0;
3981         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3982 
3983         if (owner_name != NULL) {
3984                 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3985                 if (len <= 0)
3986                         goto out;
3987                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3988                 return NFS_ATTR_FATTR_OWNER_NAME;
3989         } else {
3990                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3991                                 XDR_MAX_NETOBJ);
3992                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3993                         goto out;
3994                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3995                 return NFS_ATTR_FATTR_OWNER;
3996         }
3997 out:
3998         if (len != -EBADMSG)
3999                 return 0;
4000         print_overflow_msg(__func__, xdr);
4001         return -EIO;
4002 }
4003 
4004 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4005                 const struct nfs_server *server, kgid_t *gid,
4006                 struct nfs4_string *group_name)
4007 {
4008         ssize_t len;
4009         char *p;
4010 
4011         *gid = make_kgid(&init_user_ns, -2);
4012         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4013                 return -EIO;
4014         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4015                 return 0;
4016         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4017 
4018         if (group_name != NULL) {
4019                 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
4020                 if (len <= 0)
4021                         goto out;
4022                 dprintk("%s: name=%s\n", __func__, group_name->data);
4023                 return NFS_ATTR_FATTR_GROUP_NAME;
4024         } else {
4025                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4026                                 XDR_MAX_NETOBJ);
4027                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4028                         goto out;
4029                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4030                 return NFS_ATTR_FATTR_GROUP;
4031         }
4032 out:
4033         if (len != -EBADMSG)
4034                 return 0;
4035         print_overflow_msg(__func__, xdr);
4036         return -EIO;
4037 }
4038 
4039 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4040 {
4041         uint32_t major = 0, minor = 0;
4042         __be32 *p;
4043         int ret = 0;
4044 
4045         *rdev = MKDEV(0,0);
4046         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4047                 return -EIO;
4048         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4049                 dev_t tmp;
4050 
4051                 p = xdr_inline_decode(xdr, 8);
4052                 if (unlikely(!p))
4053                         goto out_overflow;
4054                 major = be32_to_cpup(p++);
4055                 minor = be32_to_cpup(p);
4056                 tmp = MKDEV(major, minor);
4057                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4058                         *rdev = tmp;
4059                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4060                 ret = NFS_ATTR_FATTR_RDEV;
4061         }
4062         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4063         return ret;
4064 out_overflow:
4065         print_overflow_msg(__func__, xdr);
4066         return -EIO;
4067 }
4068 
4069 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4070 {
4071         __be32 *p;
4072         int status = 0;
4073 
4074         *res = 0;
4075         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4076                 return -EIO;
4077         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4078                 p = xdr_inline_decode(xdr, 8);
4079                 if (unlikely(!p))
4080                         goto out_overflow;
4081                 xdr_decode_hyper(p, res);
4082                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4083         }
4084         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4085         return status;
4086 out_overflow:
4087         print_overflow_msg(__func__, xdr);
4088         return -EIO;
4089 }
4090 
4091 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4092 {
4093         __be32 *p;
4094         int status = 0;
4095 
4096         *res = 0;
4097         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4098                 return -EIO;
4099         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4100                 p = xdr_inline_decode(xdr, 8);
4101                 if (unlikely(!p))
4102                         goto out_overflow;
4103                 xdr_decode_hyper(p, res);
4104                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4105         }
4106         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4107         return status;
4108 out_overflow:
4109         print_overflow_msg(__func__, xdr);
4110         return -EIO;
4111 }
4112 
4113 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4114 {
4115         __be32 *p;
4116         int status = 0;
4117 
4118         *res = 0;
4119         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4120                 return -EIO;
4121         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4122                 p = xdr_inline_decode(xdr, 8);
4123                 if (unlikely(!p))
4124                         goto out_overflow;
4125                 xdr_decode_hyper(p, res);
4126                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4127         }
4128         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4129         return status;
4130 out_overflow:
4131         print_overflow_msg(__func__, xdr);
4132         return -EIO;
4133 }
4134 
4135 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4136 {
4137         __be32 *p;
4138         int ret = 0;
4139 
4140         *used = 0;
4141         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4142                 return -EIO;
4143         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4144                 p = xdr_inline_decode(xdr, 8);
4145                 if (unlikely(!p))
4146                         goto out_overflow;
4147                 xdr_decode_hyper(p, used);
4148                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4149                 ret = NFS_ATTR_FATTR_SPACE_USED;
4150         }
4151         dprintk("%s: space used=%Lu\n", __func__,
4152                         (unsigned long long)*used);
4153         return ret;
4154 out_overflow:
4155         print_overflow_msg(__func__, xdr);
4156         return -EIO;
4157 }
4158 
4159 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4160 {
4161         __be32 *p;
4162         uint64_t sec;
4163         uint32_t nsec;
4164 
4165         p = xdr_inline_decode(xdr, 12);
4166         if (unlikely(!p))
4167                 goto out_overflow;
4168         p = xdr_decode_hyper(p, &sec);
4169         nsec = be32_to_cpup(p);
4170         time->tv_sec = (time_t)sec;
4171         time->tv_nsec = (long)nsec;
4172         return 0;
4173 out_overflow:
4174         print_overflow_msg(__func__, xdr);
4175         return -EIO;
4176 }
4177 
4178 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4179 {
4180         int status = 0;
4181 
4182         time->tv_sec = 0;
4183         time->tv_nsec = 0;
4184         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4185                 return -EIO;
4186         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4187                 status = decode_attr_time(xdr, time);
4188                 if (status == 0)
4189                         status = NFS_ATTR_FATTR_ATIME;
4190                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4191         }
4192         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4193         return status;
4194 }
4195 
4196 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4197 {
4198         int status = 0;
4199 
4200         time->tv_sec = 0;
4201         time->tv_nsec = 0;
4202         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4203                 return -EIO;
4204         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4205                 status = decode_attr_time(xdr, time);
4206                 if (status == 0)
4207                         status = NFS_ATTR_FATTR_CTIME;
4208                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4209         }
4210         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4211         return status;
4212 }
4213 
4214 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4215                                   struct timespec *time)
4216 {
4217         int status = 0;
4218 
4219         time->tv_sec = 0;
4220         time->tv_nsec = 0;
4221         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4222                 return -EIO;
4223         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4224                 status = decode_attr_time(xdr, time);
4225                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4226         }
4227         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4228                 (long)time->tv_nsec);
4229         return status;
4230 }
4231 
4232 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4233                                         struct nfs4_label *label)
4234 {
4235         uint32_t pi = 0;
4236         uint32_t lfs = 0;
4237         __u32 len;
4238         __be32 *p;
4239         int status = 0;
4240 
4241         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4242                 return -EIO;
4243         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4244                 p = xdr_inline_decode(xdr, 4);
4245                 if (unlikely(!p))
4246                         goto out_overflow;
4247                 lfs = be32_to_cpup(p++);
4248                 p = xdr_inline_decode(xdr, 4);
4249                 if (unlikely(!p))
4250                         goto out_overflow;
4251                 pi = be32_to_cpup(p++);
4252                 p = xdr_inline_decode(xdr, 4);
4253                 if (unlikely(!p))
4254                         goto out_overflow;
4255                 len = be32_to_cpup(p++);
4256                 p = xdr_inline_decode(xdr, len);
4257                 if (unlikely(!p))
4258                         goto out_overflow;
4259                 if (len < NFS4_MAXLABELLEN) {
4260                         if (label) {
4261                                 memcpy(label->label, p, len);
4262                                 label->len = len;
4263                                 label->pi = pi;
4264                                 label->lfs = lfs;
4265                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4266                         }
4267                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4268                 } else
4269                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4270                                         __func__, len);
4271         }
4272         if (label && label->label)
4273                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4274                         (char *)label->label, label->len, label->pi, label->lfs);
4275         return status;
4276 
4277 out_overflow:
4278         print_overflow_msg(__func__, xdr);
4279         return -EIO;
4280 }
4281 
4282 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4283 {
4284         int status = 0;
4285 
4286         time->tv_sec = 0;
4287         time->tv_nsec = 0;
4288         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4289                 return -EIO;
4290         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4291                 status = decode_attr_time(xdr, time);
4292                 if (status == 0)
4293                         status = NFS_ATTR_FATTR_MTIME;
4294                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4295         }
4296         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4297         return status;
4298 }
4299 
4300 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4301 {
4302         unsigned int attrwords = XDR_QUADLEN(attrlen);
4303         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4304 
4305         if (unlikely(attrwords != nwords)) {
4306                 dprintk("%s: server returned incorrect attribute length: "
4307                         "%u %c %u\n",
4308                                 __func__,
4309                                 attrwords << 2,
4310                                 (attrwords < nwords) ? '<' : '>',
4311                                 nwords << 2);
4312                 return -EIO;
4313         }
4314         return 0;
4315 }
4316 
4317 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4318 {
4319         __be32 *p;
4320 
4321         p = xdr_inline_decode(xdr, 20);
4322         if (unlikely(!p))
4323                 goto out_overflow;
4324         cinfo->atomic = be32_to_cpup(p++);
4325         p = xdr_decode_hyper(p, &cinfo->before);
4326         xdr_decode_hyper(p, &cinfo->after);
4327         return 0;
4328 out_overflow:
4329         print_overflow_msg(__func__, xdr);
4330         return -EIO;
4331 }
4332 
4333 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4334 {
4335         __be32 *p;
4336         uint32_t supp, acc;
4337         int status;
4338 
4339         status = decode_op_hdr(xdr, OP_ACCESS);
4340         if (status)
4341                 return status;
4342         p = xdr_inline_decode(xdr, 8);
4343         if (unlikely(!p))
4344                 goto out_overflow;
4345         supp = be32_to_cpup(p++);
4346         acc = be32_to_cpup(p);
4347         *supported = supp;
4348         *access = acc;
4349         return 0;
4350 out_overflow:
4351         print_overflow_msg(__func__, xdr);
4352         return -EIO;
4353 }
4354 
4355 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4356 {
4357         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4358         if (unlikely(ret < 0)) {
4359                 print_overflow_msg(__func__, xdr);
4360                 return -EIO;
4361         }
4362         return 0;
4363 }
4364 
4365 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4366 {
4367         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4368 }
4369 
4370 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371 {
4372         stateid->type = NFS4_OPEN_STATEID_TYPE;
4373         return decode_stateid(xdr, stateid);
4374 }
4375 
4376 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377 {
4378         stateid->type = NFS4_LOCK_STATEID_TYPE;
4379         return decode_stateid(xdr, stateid);
4380 }
4381 
4382 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4383 {
4384         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4385         return decode_stateid(xdr, stateid);
4386 }
4387 
4388 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4389 {
4390         nfs4_stateid dummy;
4391 
4392         nfs4_stateid_copy(stateid, &invalid_stateid);
4393         return decode_stateid(xdr, &dummy);
4394 }
4395 
4396 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4397 {
4398         int status;
4399 
4400         status = decode_op_hdr(xdr, OP_CLOSE);
4401         if (status != -EIO)
4402                 nfs_increment_open_seqid(status, res->seqid);
4403         if (!status)
4404                 status = decode_invalid_stateid(xdr, &res->stateid);
4405         return status;
4406 }
4407 
4408 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4409 {
4410         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4411 }
4412 
4413 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4414 {
4415         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4416 }
4417 
4418 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4419 {
4420         int status;
4421 
4422         status = decode_op_hdr(xdr, OP_COMMIT);
4423         if (!status)
4424                 status = decode_write_verifier(xdr, &res->verf->verifier);
4425         return status;
4426 }
4427 
4428 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4429 {
4430         __be32 *p;
4431         uint32_t bmlen;
4432         int status;
4433 
4434         status = decode_op_hdr(xdr, OP_CREATE);
4435         if (status)
4436                 return status;
4437         if ((status = decode_change_info(xdr, cinfo)))
4438                 return status;
4439         p = xdr_inline_decode(xdr, 4);
4440         if (unlikely(!p))
4441                 goto out_overflow;
4442         bmlen = be32_to_cpup(p);
4443         p = xdr_inline_decode(xdr, bmlen << 2);
4444         if (likely(p))
4445                 return 0;
4446 out_overflow:
4447         print_overflow_msg(__func__, xdr);
4448         return -EIO;
4449 }
4450 
4451 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4452 {
4453         unsigned int savep;
4454         uint32_t attrlen, bitmap[3] = {0};
4455         int status;
4456 
4457         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4458                 goto xdr_error;
4459         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4460                 goto xdr_error;
4461         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4462                 goto xdr_error;
4463         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4464                 goto xdr_error;
4465         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4466                                                  &res->fh_expire_type)) != 0)
4467                 goto xdr_error;
4468         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4469                 goto xdr_error;
4470         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4471                 goto xdr_error;
4472         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4473                 goto xdr_error;
4474         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4475                                 res->exclcreat_bitmask)) != 0)
4476                 goto xdr_error;
4477         status = verify_attr_len(xdr, savep, attrlen);
4478 xdr_error:
4479         dprintk("%s: xdr returned %d!\n", __func__, -status);
4480         return status;
4481 }
4482 
4483 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4484 {
4485         unsigned int savep;
4486         uint32_t attrlen, bitmap[3] = {0};
4487         int status;
4488 
4489         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4490                 goto xdr_error;
4491         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4492                 goto xdr_error;
4493         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4494                 goto xdr_error;
4495 
4496         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4497                 goto xdr_error;
4498         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4499                 goto xdr_error;
4500         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4501                 goto xdr_error;
4502 
4503         status = -EIO;
4504         if (unlikely(bitmap[0]))
4505                 goto xdr_error;
4506 
4507         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4508                 goto xdr_error;
4509         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4510                 goto xdr_error;
4511         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4512                 goto xdr_error;
4513 
4514         status = verify_attr_len(xdr, savep, attrlen);
4515 xdr_error:
4516         dprintk("%s: xdr returned %d!\n", __func__, -status);
4517         return status;
4518 }
4519 
4520 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4521 {
4522         unsigned int savep;
4523         uint32_t attrlen, bitmap[3] = {0};
4524         int status;
4525 
4526         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4527                 goto xdr_error;
4528         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4529                 goto xdr_error;
4530         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4531                 goto xdr_error;
4532 
4533         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4534                 goto xdr_error;
4535         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4536                 goto xdr_error;
4537 
4538         status = verify_attr_len(xdr, savep, attrlen);
4539 xdr_error:
4540         dprintk("%s: xdr returned %d!\n", __func__, -status);
4541         return status;
4542 }
4543 
4544 static int decode_threshold_hint(struct xdr_stream *xdr,
4545                                   uint32_t *bitmap,
4546                                   uint64_t *res,
4547                                   uint32_t hint_bit)
4548 {
4549         __be32 *p;
4550 
4551         *res = 0;
4552         if (likely(bitmap[0] & hint_bit)) {
4553                 p = xdr_inline_decode(xdr, 8);
4554                 if (unlikely(!p))
4555                         goto out_overflow;
4556                 xdr_decode_hyper(p, res);
4557         }
4558         return 0;
4559 out_overflow:
4560         print_overflow_msg(__func__, xdr);
4561         return -EIO;
4562 }
4563 
4564 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4565                                         struct nfs4_threshold *res)
4566 {
4567         __be32 *p;
4568         unsigned int savep;
4569         uint32_t bitmap[3] = {0,}, attrlen;
4570         int status;
4571 
4572         /* layout type */
4573         p = xdr_inline_decode(xdr, 4);
4574         if (unlikely(!p)) {
4575                 print_overflow_msg(__func__, xdr);
4576                 return -EIO;
4577         }
4578         res->l_type = be32_to_cpup(p);
4579 
4580         /* thi_hintset bitmap */
4581         status = decode_attr_bitmap(xdr, bitmap);
4582         if (status < 0)
4583                 goto xdr_error;
4584 
4585         /* thi_hintlist length */
4586         status = decode_attr_length(xdr, &attrlen, &savep);
4587         if (status < 0)
4588                 goto xdr_error;
4589         /* thi_hintlist */
4590         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4591         if (status < 0)
4592                 goto xdr_error;
4593         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4594         if (status < 0)
4595                 goto xdr_error;
4596         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4597                                        THRESHOLD_RD_IO);
4598         if (status < 0)
4599                 goto xdr_error;
4600         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4601                                        THRESHOLD_WR_IO);
4602         if (status < 0)
4603                 goto xdr_error;
4604 
4605         status = verify_attr_len(xdr, savep, attrlen);
4606         res->bm = bitmap[0];
4607 
4608         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4609                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4610                 res->wr_io_sz);
4611 xdr_error:
4612         dprintk("%s ret=%d!\n", __func__, status);
4613         return status;
4614 }
4615 
4616 /*
4617  * Thresholds on pNFS direct I/O vrs MDS I/O
4618  */
4619 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4620                                     uint32_t *bitmap,
4621                                     struct nfs4_threshold *res)
4622 {
4623         __be32 *p;
4624         int status = 0;
4625         uint32_t num;
4626 
4627         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4628                 return -EIO;
4629         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4630                 /* Did the server return an unrequested attribute? */
4631                 if (unlikely(res == NULL))
4632                         return -EREMOTEIO;
4633                 p = xdr_inline_decode(xdr, 4);
4634                 if (unlikely(!p))
4635                         goto out_overflow;
4636                 num = be32_to_cpup(p);
4637                 if (num == 0)
4638                         return 0;
4639                 if (num > 1)
4640                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4641                                 "drivers per filesystem not supported\n",
4642                                 __func__);
4643 
4644                 status = decode_first_threshold_item4(xdr, res);
4645                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4646         }
4647         return status;
4648 out_overflow:
4649         print_overflow_msg(__func__, xdr);
4650         return -EIO;
4651 }
4652 
4653 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4654                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4655                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4656                 const struct nfs_server *server)
4657 {
4658         int status;
4659         umode_t fmode = 0;
4660         uint32_t type;
4661         int32_t err;
4662 
4663         status = decode_attr_type(xdr, bitmap, &type);
4664         if (status < 0)
4665                 goto xdr_error;
4666         fattr->mode = 0;
4667         if (status != 0) {
4668                 fattr->mode |= nfs_type2fmt[type];
4669                 fattr->valid |= status;
4670         }
4671 
4672         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4673         if (status < 0)
4674                 goto xdr_error;
4675         fattr->valid |= status;
4676 
4677         status = decode_attr_size(xdr, bitmap, &fattr->size);
4678         if (status < 0)
4679                 goto xdr_error;
4680         fattr->valid |= status;
4681 
4682         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4683         if (status < 0)
4684                 goto xdr_error;
4685         fattr->valid |= status;
4686 
4687         err = 0;
4688         status = decode_attr_error(xdr, bitmap, &err);
4689         if (status < 0)
4690                 goto xdr_error;
4691 
4692         status = decode_attr_filehandle(xdr, bitmap, fh);
4693         if (status < 0)
4694                 goto xdr_error;
4695 
4696         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4697         if (status < 0)
4698                 goto xdr_error;
4699         fattr->valid |= status;
4700 
4701         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4702         if (status < 0)
4703                 goto xdr_error;
4704         fattr->valid |= status;
4705 
4706         status = -EIO;
4707         if (unlikely(bitmap[0]))
4708                 goto xdr_error;
4709 
4710         status = decode_attr_mode(xdr, bitmap, &fmode);
4711         if (status < 0)
4712                 goto xdr_error;
4713         if (status != 0) {
4714                 fattr->mode |= fmode;
4715                 fattr->valid |= status;
4716         }
4717 
4718         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4719         if (status < 0)
4720                 goto xdr_error;
4721         fattr->valid |= status;
4722 
4723         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4724         if (status < 0)
4725                 goto xdr_error;
4726         fattr->valid |= status;
4727 
4728         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4729         if (status < 0)
4730                 goto xdr_error;
4731         fattr->valid |= status;
4732 
4733         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4734         if (status < 0)
4735                 goto xdr_error;
4736         fattr->valid |= status;
4737 
4738         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4739         if (status < 0)
4740                 goto xdr_error;
4741         fattr->valid |= status;
4742 
4743         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4744         if (status < 0)
4745                 goto xdr_error;
4746         fattr->valid |= status;
4747 
4748         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4749         if (status < 0)
4750                 goto xdr_error;
4751         fattr->valid |= status;
4752 
4753         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4754         if (status < 0)
4755                 goto xdr_error;
4756         fattr->valid |= status;
4757 
4758         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4759         if (status < 0)
4760                 goto xdr_error;
4761         fattr->valid |= status;
4762 
4763         status = -EIO;
4764         if (unlikely(bitmap[1]))
4765                 goto xdr_error;
4766 
4767         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4768         if (status < 0)
4769                 goto xdr_error;
4770 
4771         if (label) {
4772                 status = decode_attr_security_label(xdr, bitmap, label);
4773                 if (status < 0)
4774                         goto xdr_error;
4775                 fattr->valid |= status;
4776         }
4777 
4778 xdr_error:
4779         dprintk("%s: xdr returned %d\n", __func__, -status);
4780         return status;
4781 }
4782 
4783 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4784                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4785                 struct nfs4_label *label, const struct nfs_server *server)
4786 {
4787         unsigned int savep;
4788         uint32_t attrlen,
4789                  bitmap[3] = {0};
4790         int status;
4791 
4792         status = decode_op_hdr(xdr, OP_GETATTR);
4793         if (status < 0)
4794                 goto xdr_error;
4795 
4796         status = decode_attr_bitmap(xdr, bitmap);
4797         if (status < 0)
4798                 goto xdr_error;
4799 
4800         status = decode_attr_length(xdr, &attrlen, &savep);
4801         if (status < 0)
4802                 goto xdr_error;
4803 
4804         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4805                                         label, server);
4806         if (status < 0)
4807                 goto xdr_error;
4808 
4809         status = verify_attr_len(xdr, savep, attrlen);
4810 xdr_error:
4811         dprintk("%s: xdr returned %d\n", __func__, -status);
4812         return status;
4813 }
4814 
4815 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4816                 struct nfs4_label *label, const struct nfs_server *server)
4817 {
4818         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4819 }
4820 
4821 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4822                 const struct nfs_server *server)
4823 {
4824         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4825 }
4826 
4827 /*
4828  * Decode potentially multiple layout types.
4829  */
4830 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4831                                     struct nfs_fsinfo *fsinfo)
4832 {
4833         __be32 *p;
4834         uint32_t i;
4835 
4836         p = xdr_inline_decode(xdr, 4);
4837         if (unlikely(!p))
4838                 goto out_overflow;
4839         fsinfo->nlayouttypes = be32_to_cpup(p);
4840 
4841         /* pNFS is not supported by the underlying file system */
4842         if (fsinfo->nlayouttypes == 0)
4843                 return 0;
4844 
4845         /* Decode and set first layout type, move xdr->p past unused types */
4846         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4847         if (unlikely(!p))
4848                 goto out_overflow;
4849 
4850         /* If we get too many, then just cap it at the max */
4851         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4852                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4853                         __func__, fsinfo->nlayouttypes);
4854                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4855         }
4856 
4857         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4858                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4859         return 0;
4860 out_overflow:
4861         print_overflow_msg(__func__, xdr);
4862         return -EIO;
4863 }
4864 
4865 /*
4866  * The type of file system exported.
4867  * Note we must ensure that layouttype is set in any non-error case.
4868  */
4869 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4870                                 struct nfs_fsinfo *fsinfo)
4871 {
4872         int status = 0;
4873 
4874         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4875         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4876                 return -EIO;
4877         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4878                 status = decode_pnfs_layout_types(xdr, fsinfo);
4879                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4880         }
4881         return status;
4882 }
4883 
4884 /*
4885  * The prefered block size for layout directed io
4886  */
4887 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4888                                       uint32_t *res)
4889 {
4890         __be32 *p;
4891 
4892         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4893         *res = 0;
4894         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4895                 p = xdr_inline_decode(xdr, 4);
4896                 if (unlikely(!p)) {
4897                         print_overflow_msg(__func__, xdr);
4898                         return -EIO;
4899                 }
4900                 *res = be32_to_cpup(p);
4901                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4902         }
4903         return 0;
4904 }
4905 
4906 /*
4907  * The granularity of a CLONE operation.
4908  */
4909 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4910                                      uint32_t *res)
4911 {
4912         __be32 *p;
4913 
4914         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4915         *res = 0;
4916         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4917                 p = xdr_inline_decode(xdr, 4);
4918                 if (unlikely(!p)) {
4919                         print_overflow_msg(__func__, xdr);
4920                         return -EIO;
4921                 }
4922                 *res = be32_to_cpup(p);
4923                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4924         }
4925         return 0;
4926 }
4927 
4928 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4929 {
4930         unsigned int savep;
4931         uint32_t attrlen, bitmap[3];
4932         int status;
4933 
4934         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4935                 goto xdr_error;
4936         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4937                 goto xdr_error;
4938         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4939                 goto xdr_error;
4940 
4941         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4942 
4943         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4944                 goto xdr_error;
4945         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4946                 goto xdr_error;
4947         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4948                 goto xdr_error;
4949         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4950         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4951                 goto xdr_error;
4952         fsinfo->wtpref = fsinfo->wtmax;
4953 
4954         status = -EIO;
4955         if (unlikely(bitmap[0]))
4956                 goto xdr_error;
4957 
4958         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4959         if (status != 0)
4960                 goto xdr_error;
4961         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4962         if (status != 0)
4963                 goto xdr_error;
4964 
4965         status = -EIO;
4966         if (unlikely(bitmap[1]))
4967                 goto xdr_error;
4968 
4969         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4970         if (status)
4971                 goto xdr_error;
4972         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4973         if (status)
4974                 goto xdr_error;
4975 
4976         status = verify_attr_len(xdr, savep, attrlen);
4977 xdr_error:
4978         dprintk("%s: xdr returned %d!\n", __func__, -status);
4979         return status;
4980 }
4981 
4982 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4983 {
4984         __be32 *p;
4985         uint32_t len;
4986         int status;
4987 
4988         /* Zero handle first to allow comparisons */
4989         memset(fh, 0, sizeof(*fh));
4990 
4991         status = decode_op_hdr(xdr, OP_GETFH);
4992         if (status)
4993                 return status;
4994 
4995         p = xdr_inline_decode(xdr, 4);
4996         if (unlikely(!p))
4997                 goto out_overflow;
4998         len = be32_to_cpup(p);
4999         if (len > NFS4_FHSIZE)
5000                 return -EIO;
5001         fh->size = len;
5002         p = xdr_inline_decode(xdr, len);
5003         if (unlikely(!p))
5004                 goto out_overflow;
5005         memcpy(fh->data, p, len);
5006         return 0;
5007 out_overflow:
5008         print_overflow_msg(__func__, xdr);
5009         return -EIO;
5010 }
5011 
5012 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5013 {
5014         int status;
5015 
5016         status = decode_op_hdr(xdr, OP_LINK);
5017         if (status)
5018                 return status;
5019         return decode_change_info(xdr, cinfo);
5020 }
5021 
5022 /*
5023  * We create the owner, so we know a proper owner.id length is 4.
5024  */
5025 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5026 {
5027         uint64_t offset, length, clientid;
5028         __be32 *p;
5029         uint32_t namelen, type;
5030 
5031         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5032         if (unlikely(!p))
5033                 goto out_overflow;
5034         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5035         p = xdr_decode_hyper(p, &length);
5036         type = be32_to_cpup(p++); /* 4 byte read */
5037         if (fl != NULL) { /* manipulate file lock */
5038                 fl->fl_start = (loff_t)offset;
5039                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5040                 if (length == ~(uint64_t)0)
5041                         fl->fl_end = OFFSET_MAX;
5042                 fl->fl_type = F_WRLCK;
5043                 if (type & 1)
5044                         fl->fl_type = F_RDLCK;
5045                 fl->fl_pid = 0;
5046         }
5047         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5048         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5049         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5050         if (likely(p))
5051                 return -NFS4ERR_DENIED;
5052 out_overflow:
5053         print_overflow_msg(__func__, xdr);
5054         return -EIO;
5055 }
5056 
5057 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5058 {
5059         int status;
5060 
5061         status = decode_op_hdr(xdr, OP_LOCK);
5062         if (status == -EIO)
5063                 goto out;
5064         if (status == 0) {
5065                 status = decode_lock_stateid(xdr, &res->stateid);
5066                 if (unlikely(status))
5067                         goto out;
5068         } else if (status == -NFS4ERR_DENIED)
5069                 status = decode_lock_denied(xdr, NULL);
5070         if (res->open_seqid != NULL)
5071                 nfs_increment_open_seqid(status, res->open_seqid);
5072         nfs_increment_lock_seqid(status, res->lock_seqid);
5073 out:
5074         return status;
5075 }
5076 
5077 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5078 {
5079         int status;
5080         status = decode_op_hdr(xdr, OP_LOCKT);
5081         if (status == -NFS4ERR_DENIED)
5082                 return decode_lock_denied(xdr, res->denied);
5083         return status;
5084 }
5085 
5086 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5087 {
5088         int status;
5089 
5090         status = decode_op_hdr(xdr, OP_LOCKU);
5091         if (status != -EIO)
5092                 nfs_increment_lock_seqid(status, res->seqid);
5093         if (status == 0)
5094                 status = decode_lock_stateid(xdr, &res->stateid);
5095         return status;
5096 }
5097 
5098 static int decode_release_lockowner(struct xdr_stream *xdr)
5099 {
5100         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5101 }
5102 
5103 static int decode_lookup(struct xdr_stream *xdr)
5104 {
5105         return decode_op_hdr(xdr, OP_LOOKUP);
5106 }
5107 
5108 static int decode_lookupp(struct xdr_stream *xdr)
5109 {
5110         return decode_op_hdr(xdr, OP_LOOKUPP);
5111 }
5112 
5113 /* This is too sick! */
5114 static int decode_space_limit(struct xdr_stream *xdr,
5115                 unsigned long *pagemod_limit)
5116 {
5117         __be32 *p;
5118         uint32_t limit_type, nblocks, blocksize;
5119         u64 maxsize = 0;
5120 
5121         p = xdr_inline_decode(xdr, 12);
5122         if (unlikely(!p))
5123                 goto out_overflow;
5124         limit_type = be32_to_cpup(p++);
5125         switch (limit_type) {
5126         case NFS4_LIMIT_SIZE:
5127                 xdr_decode_hyper(p, &maxsize);
5128                 break;
5129         case NFS4_LIMIT_BLOCKS:
5130                 nblocks = be32_to_cpup(p++);
5131                 blocksize = be32_to_cpup(p);
5132                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5133         }
5134         maxsize >>= PAGE_SHIFT;
5135         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5136         return 0;
5137 out_overflow:
5138         print_overflow_msg(__func__, xdr);
5139         return -EIO;
5140 }
5141 
5142 static int decode_rw_delegation(struct xdr_stream *xdr,
5143                 uint32_t delegation_type,
5144                 struct nfs_openres *res)
5145 {
5146         __be32 *p;
5147         int status;
5148 
5149         status = decode_delegation_stateid(xdr, &res->delegation);
5150         if (unlikely(status))
5151                 return status;
5152         p = xdr_inline_decode(xdr, 4);
5153         if (unlikely(!p))
5154                 goto out_overflow;
5155         res->do_recall = be32_to_cpup(p);
5156 
5157         switch (delegation_type) {
5158         case NFS4_OPEN_DELEGATE_READ:
5159                 res->delegation_type = FMODE_READ;
5160                 break;
5161         case NFS4_OPEN_DELEGATE_WRITE:
5162                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5163                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5164                                 return -EIO;
5165         }
5166         return decode_ace(xdr, NULL);
5167 out_overflow:
5168         print_overflow_msg(__func__, xdr);
5169         return -EIO;
5170 }
5171 
5172 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5173 {
5174         __be32 *p;
5175         uint32_t why_no_delegation;
5176 
5177         p = xdr_inline_decode(xdr, 4);
5178         if (unlikely(!p))
5179                 goto out_overflow;
5180         why_no_delegation = be32_to_cpup(p);
5181         switch (why_no_delegation) {
5182                 case WND4_CONTENTION:
5183                 case WND4_RESOURCE:
5184                         xdr_inline_decode(xdr, 4);
5185                         /* Ignore for now */
5186         }
5187         return 0;
5188 out_overflow:
5189         print_overflow_msg(__func__, xdr);
5190         return -EIO;
5191 }
5192 
5193 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5194 {
5195         __be32 *p;
5196         uint32_t delegation_type;
5197 
5198         p = xdr_inline_decode(xdr, 4);
5199         if (unlikely(!p))
5200                 goto out_overflow;
5201         delegation_type = be32_to_cpup(p);
5202         res->delegation_type = 0;
5203         switch (delegation_type) {
5204         case NFS4_OPEN_DELEGATE_NONE:
5205                 return 0;
5206         case NFS4_OPEN_DELEGATE_READ:
5207         case NFS4_OPEN_DELEGATE_WRITE:
5208                 return decode_rw_delegation(xdr, delegation_type, res);
5209         case NFS4_OPEN_DELEGATE_NONE_EXT:
5210                 return decode_no_delegation(xdr, res);
5211         }
5212         return -EIO;
5213 out_overflow:
5214         print_overflow_msg(__func__, xdr);
5215         return -EIO;
5216 }
5217 
5218 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5219 {
5220         __be32 *p;
5221         uint32_t savewords, bmlen, i;
5222         int status;
5223 
5224         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5225                 return status;
5226         nfs_increment_open_seqid(status, res->seqid);
5227         if (status)
5228                 return status;
5229         status = decode_open_stateid(xdr, &res->stateid);
5230         if (unlikely(status))
5231                 return status;
5232 
5233         decode_change_info(xdr, &res->cinfo);
5234 
5235         p = xdr_inline_decode(xdr, 8);
5236         if (unlikely(!p))
5237                 goto out_overflow;
5238         res->rflags = be32_to_cpup(p++);
5239         bmlen = be32_to_cpup(p);
5240         if (bmlen > 10)
5241                 goto xdr_error;
5242 
5243         p = xdr_inline_decode(xdr, bmlen << 2);
5244         if (unlikely(!p))
5245                 goto out_overflow;
5246         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5247         for (i = 0; i < savewords; ++i)
5248                 res->attrset[i] = be32_to_cpup(p++);
5249         for (; i < NFS4_BITMAP_SIZE; i++)
5250                 res->attrset[i] = 0;
5251 
5252         return decode_delegation(xdr, res);
5253 xdr_error:
5254         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5255         return -EIO;
5256 out_overflow:
5257         print_overflow_msg(__func__, xdr);
5258         return -EIO;
5259 }
5260 
5261 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5262 {
5263         int status;
5264 
5265         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5266         if (status != -EIO)
5267                 nfs_increment_open_seqid(status, res->seqid);
5268         if (!status)
5269                 status = decode_open_stateid(xdr, &res->stateid);
5270         return status;
5271 }
5272 
5273 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5274 {
5275         int status;
5276 
5277         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5278         if (status != -EIO)
5279                 nfs_increment_open_seqid(status, res->seqid);
5280         if (!status)
5281                 status = decode_open_stateid(xdr, &res->stateid);
5282         return status;
5283 }
5284 
5285 static int decode_putfh(struct xdr_stream *xdr)
5286 {
5287         return decode_op_hdr(xdr, OP_PUTFH);
5288 }
5289 
5290 static int decode_putrootfh(struct xdr_stream *xdr)
5291 {
5292         return decode_op_hdr(xdr, OP_PUTROOTFH);
5293 }
5294 
5295 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5296                        struct nfs_pgio_res *res)
5297 {
5298         __be32 *p;
5299         uint32_t count, eof, recvd;
5300         int status;
5301 
5302         status = decode_op_hdr(xdr, OP_READ);
5303         if (status)
5304                 return status;
5305         p = xdr_inline_decode(xdr, 8);
5306         if (unlikely(!p))
5307                 goto out_overflow;
5308         eof = be32_to_cpup(p++);
5309         count = be32_to_cpup(p);
5310         recvd = xdr_read_pages(xdr, count);
5311         if (count > recvd) {
5312                 dprintk("NFS: server cheating in read reply: "
5313                                 "count %u > recvd %u\n", count, recvd);
5314                 count = recvd;
5315                 eof = 0;
5316         }
5317         res->eof = eof;
5318         res->count = count;
5319         return 0;
5320 out_overflow:
5321         print_overflow_msg(__func__, xdr);
5322         return -EIO;
5323 }
5324 
5325 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5326 {
5327         int             status;
5328         __be32          verf[2];
5329 
5330         status = decode_op_hdr(xdr, OP_READDIR);
5331         if (!status)
5332                 status = decode_verifier(xdr, readdir->verifier.data);
5333         if (unlikely(status))
5334                 return status;
5335         memcpy(verf, readdir->verifier.data, sizeof(verf));
5336         dprintk("%s: verifier = %08x:%08x\n",
5337                         __func__, verf[0], verf[1]);
5338         return xdr_read_pages(xdr, xdr->buf->page_len);
5339 }
5340 
5341 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5342 {
5343         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5344         u32 len, recvd;
5345         __be32 *p;
5346         int status;
5347 
5348         status = decode_op_hdr(xdr, OP_READLINK);
5349         if (status)
5350                 return status;
5351 
5352         /* Convert length of symlink */
5353         p = xdr_inline_decode(xdr, 4);
5354         if (unlikely(!p))
5355                 goto out_overflow;
5356         len = be32_to_cpup(p);
5357         if (len >= rcvbuf->page_len || len <= 0) {
5358                 dprintk("nfs: server returned giant symlink!\n");
5359                 return -ENAMETOOLONG;
5360         }
5361         recvd = xdr_read_pages(xdr, len);
5362         if (recvd < len) {
5363                 dprintk("NFS: server cheating in readlink reply: "
5364                                 "count %u > recvd %u\n", len, recvd);
5365                 return -EIO;
5366         }
5367         /*
5368          * The XDR encode routine has set things up so that
5369          * the link text will be copied directly into the
5370          * buffer.  We just have to do overflow-checking,
5371          * and and null-terminate the text (the VFS expects
5372          * null-termination).
5373          */
5374         xdr_terminate_string(rcvbuf, len);
5375         return 0;
5376 out_overflow:
5377         print_overflow_msg(__func__, xdr);
5378         return -EIO;
5379 }
5380 
5381 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5382 {
5383         int status;
5384 
5385         status = decode_op_hdr(xdr, OP_REMOVE);
5386         if (status)
5387                 goto out;
5388         status = decode_change_info(xdr, cinfo);
5389 out:
5390         return status;
5391 }
5392 
5393 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5394               struct nfs4_change_info *new_cinfo)
5395 {
5396         int status;
5397 
5398         status = decode_op_hdr(xdr, OP_RENAME);
5399         if (status)
5400                 goto out;
5401         if ((status = decode_change_info(xdr, old_cinfo)))
5402                 goto out;
5403         status = decode_change_info(xdr, new_cinfo);
5404 out:
5405         return status;
5406 }
5407 
5408 static int decode_renew(struct xdr_stream *xdr)
5409 {
5410         return decode_op_hdr(xdr, OP_RENEW);
5411 }
5412 
5413 static int
5414 decode_restorefh(struct xdr_stream *xdr)
5415 {
5416         return decode_op_hdr(xdr, OP_RESTOREFH);
5417 }
5418 
5419 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5420                          struct nfs_getaclres *res)
5421 {
5422         unsigned int savep;
5423         uint32_t attrlen,
5424                  bitmap[3] = {0};
5425         int status;
5426         unsigned int pg_offset;
5427 
5428         res->acl_len = 0;
5429         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5430                 goto out;
5431 
5432         xdr_enter_page(xdr, xdr->buf->page_len);
5433 
5434         /* Calculate the offset of the page data */
5435         pg_offset = xdr->buf->head[0].iov_len;
5436 
5437         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5438                 goto out;
5439         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5440                 goto out;
5441 
5442         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5443                 return -EIO;
5444         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5445 
5446                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5447                  * are stored with the acl data to handle the problem of
5448                  * variable length bitmaps.*/
5449                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5450                 res->acl_len = attrlen;
5451 
5452                 /* Check for receive buffer overflow */
5453                 if (res->acl_len > (xdr->nwords << 2) ||
5454                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5455                         res->acl_flags |= NFS4_ACL_TRUNC;
5456                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5457                                         attrlen, xdr->nwords << 2);
5458                 }
5459         } else
5460                 status = -EOPNOTSUPP;
5461 
5462 out:
5463         return status;
5464 }
5465 
5466 static int
5467 decode_savefh(struct xdr_stream *xdr)
5468 {
5469         return decode_op_hdr(xdr, OP_SAVEFH);
5470 }
5471 
5472 static int decode_setattr(struct xdr_stream *xdr)
5473 {
5474         __be32 *p;
5475         uint32_t bmlen;
5476         int status;
5477 
5478         status = decode_op_hdr(xdr, OP_SETATTR);
5479         if (status)
5480                 return status;
5481         p = xdr_inline_decode(xdr, 4);
5482         if (unlikely(!p))
5483                 goto out_overflow;
5484         bmlen = be32_to_cpup(p);
5485         p = xdr_inline_decode(xdr, bmlen << 2);
5486         if (likely(p))
5487                 return 0;
5488 out_overflow:
5489         print_overflow_msg(__func__, xdr);
5490         return -EIO;
5491 }
5492 
5493 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5494 {
5495         __be32 *p;
5496         uint32_t opnum;
5497         int32_t nfserr;
5498 
5499         p = xdr_inline_decode(xdr, 8);
5500         if (unlikely(!p))
5501                 goto out_overflow;
5502         opnum = be32_to_cpup(p++);
5503         if (opnum != OP_SETCLIENTID) {
5504                 dprintk("nfs: decode_setclientid: Server returned operation"
5505                         " %d\n", opnum);
5506                 return -EIO;
5507         }
5508         nfserr = be32_to_cpup(p);
5509         if (nfserr == NFS_OK) {
5510                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5511                 if (unlikely(!p))
5512                         goto out_overflow;
5513                 p = xdr_decode_hyper(p, &res->clientid);
5514                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5515         } else if (nfserr == NFSERR_CLID_INUSE) {
5516                 uint32_t len;
5517 
5518                 /* skip netid string */
5519                 p = xdr_inline_decode(xdr, 4);
5520                 if (unlikely(!p))
5521                         goto out_overflow;
5522                 len = be32_to_cpup(p);
5523                 p = xdr_inline_decode(xdr, len);
5524                 if (unlikely(!p))
5525                         goto out_overflow;
5526 
5527                 /* skip uaddr string */
5528                 p = xdr_inline_decode(xdr, 4);
5529                 if (unlikely(!p))
5530                         goto out_overflow;
5531                 len = be32_to_cpup(p);
5532                 p = xdr_inline_decode(xdr, len);
5533                 if (unlikely(!p))
5534                         goto out_overflow;
5535                 return -NFSERR_CLID_INUSE;
5536         } else
5537                 return nfs4_stat_to_errno(nfserr);
5538 
5539         return 0;
5540 out_overflow:
5541         print_overflow_msg(__func__, xdr);
5542         return -EIO;
5543 }
5544 
5545 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5546 {
5547         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5548 }
5549 
5550 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5551 {
5552         __be32 *p;
5553         int status;
5554 
5555         status = decode_op_hdr(xdr, OP_WRITE);
5556         if (status)
5557                 return status;
5558 
5559         p = xdr_inline_decode(xdr, 8);
5560         if (unlikely(!p))
5561                 goto out_overflow;
5562         res->count = be32_to_cpup(p++);
5563         res->verf->committed = be32_to_cpup(p++);
5564         return decode_write_verifier(xdr, &res->verf->verifier);
5565 out_overflow:
5566         print_overflow_msg(__func__, xdr);
5567         return -EIO;
5568 }
5569 
5570 static int decode_delegreturn(struct xdr_stream *xdr)
5571 {
5572         return decode_op_hdr(xdr, OP_DELEGRETURN);
5573 }
5574 
5575 static int decode_secinfo_gss(struct xdr_stream *xdr,
5576                               struct nfs4_secinfo4 *flavor)
5577 {
5578         u32 oid_len;
5579         __be32 *p;
5580 
5581         p = xdr_inline_decode(xdr, 4);
5582         if (unlikely(!p))
5583                 goto out_overflow;
5584         oid_len = be32_to_cpup(p);
5585         if (oid_len > GSS_OID_MAX_LEN)
5586                 goto out_err;
5587 
5588         p = xdr_inline_decode(xdr, oid_len);
5589         if (unlikely(!p))
5590                 goto out_overflow;
5591         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5592         flavor->flavor_info.oid.len = oid_len;
5593 
5594         p = xdr_inline_decode(xdr, 8);
5595         if (unlikely(!p))
5596                 goto out_overflow;
5597         flavor->flavor_info.qop = be32_to_cpup(p++);
5598         flavor->flavor_info.service = be32_to_cpup(p);
5599 
5600         return 0;
5601 
5602 out_overflow:
5603         print_overflow_msg(__func__, xdr);
5604         return -EIO;
5605 out_err:
5606         return -EINVAL;
5607 }
5608 
5609 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5610 {
5611         struct nfs4_secinfo4 *sec_flavor;
5612         unsigned int i, num_flavors;
5613         int status;
5614         __be32 *p;
5615 
5616         p = xdr_inline_decode(xdr, 4);
5617         if (unlikely(!p))
5618                 goto out_overflow;
5619 
5620         res->flavors->num_flavors = 0;
5621         num_flavors = be32_to_cpup(p);
5622 
5623         for (i = 0; i < num_flavors; i++) {
5624                 sec_flavor = &res->flavors->flavors[i];
5625                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5626                         break;
5627 
5628                 p = xdr_inline_decode(xdr, 4);
5629                 if (unlikely(!p))
5630                         goto out_overflow;
5631                 sec_flavor->flavor = be32_to_cpup(p);
5632 
5633                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5634                         status = decode_secinfo_gss(xdr, sec_flavor);
5635                         if (status)
5636                                 goto out;
5637                 }
5638                 res->flavors->num_flavors++;
5639         }
5640 
5641         status = 0;
5642 out:
5643         return status;
5644 out_overflow:
5645         print_overflow_msg(__func__, xdr);
5646         return -EIO;
5647 }
5648 
5649 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5650 {
5651         int status = decode_op_hdr(xdr, OP_SECINFO);
5652         if (status)
5653                 return status;
5654         return decode_secinfo_common(xdr, res);
5655 }
5656 
5657 #if defined(CONFIG_NFS_V4_1)
5658 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5659 {
5660         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5661         if (status)
5662                 return status;
5663         return decode_secinfo_common(xdr, res);
5664 }
5665 
5666 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5667 {
5668         __be32 *p;
5669         uint32_t bitmap_words;
5670         unsigned int i;
5671 
5672         p = xdr_inline_decode(xdr, 4);
5673         if (!p)
5674                 return -EIO;
5675         bitmap_words = be32_to_cpup(p++);
5676         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5677                 return -EIO;
5678         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5679         for (i = 0; i < bitmap_words; i++)
5680                 op_map->u.words[i] = be32_to_cpup(p++);
5681 
5682         return 0;
5683 }
5684 
5685 static int decode_exchange_id(struct xdr_stream *xdr,
5686                               struct nfs41_exchange_id_res *res)
5687 {
5688         __be32 *p;
5689         uint32_t dummy;
5690         char *dummy_str;
5691         int status;
5692         uint32_t impl_id_count;
5693 
5694         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5695         if (status)
5696                 return status;
5697 
5698         p = xdr_inline_decode(xdr, 8);
5699         if (unlikely(!p))
5700                 goto out_overflow;
5701         xdr_decode_hyper(p, &res->clientid);
5702         p = xdr_inline_decode(xdr, 12);
5703         if (unlikely(!p))
5704                 goto out_overflow;
5705         res->seqid = be32_to_cpup(p++);
5706         res->flags = be32_to_cpup(p++);
5707 
5708         res->state_protect.how = be32_to_cpup(p);
5709         switch (res->state_protect.how) {
5710         case SP4_NONE:
5711                 break;
5712         case SP4_MACH_CRED:
5713                 status = decode_op_map(xdr, &res->state_protect.enforce);
5714                 if (status)
5715                         return status;
5716                 status = decode_op_map(xdr, &res->state_protect.allow);
5717                 if (status)
5718                         return status;
5719                 break;
5720         default:
5721                 WARN_ON_ONCE(1);
5722                 return -EIO;
5723         }
5724 
5725         /* server_owner4.so_minor_id */
5726         p = xdr_inline_decode(xdr, 8);
5727         if (unlikely(!p))
5728                 goto out_overflow;
5729         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5730 
5731         /* server_owner4.so_major_id */
5732         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5733         if (unlikely(status))
5734                 return status;
5735         memcpy(res->server_owner->major_id, dummy_str, dummy);
5736         res->server_owner->major_id_sz = dummy;
5737 
5738         /* server_scope4 */
5739         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5740         if (unlikely(status))
5741                 return status;
5742         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5743         res->server_scope->server_scope_sz = dummy;
5744 
5745         /* Implementation Id */
5746         p = xdr_inline_decode(xdr, 4);
5747         if (unlikely(!p))
5748                 goto out_overflow;
5749         impl_id_count = be32_to_cpup(p++);
5750 
5751         if (impl_id_count) {
5752                 /* nii_domain */
5753                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5754                 if (unlikely(status))
5755                         return status;
5756                 memcpy(res->impl_id->domain, dummy_str, dummy);
5757 
5758                 /* nii_name */
5759                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5760                 if (unlikely(status))
5761                         return status;
5762                 memcpy(res->impl_id->name, dummy_str, dummy);
5763 
5764                 /* nii_date */
5765                 p = xdr_inline_decode(xdr, 12);
5766                 if (unlikely(!p))
5767                         goto out_overflow;
5768                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5769                 res->impl_id->date.nseconds = be32_to_cpup(p);
5770 
5771                 /* if there's more than one entry, ignore the rest */
5772         }
5773         return 0;
5774 out_overflow:
5775         print_overflow_msg(__func__, xdr);
5776         return -EIO;
5777 }
5778 
5779 static int decode_chan_attrs(struct xdr_stream *xdr,
5780                              struct nfs4_channel_attrs *attrs)
5781 {
5782         __be32 *p;
5783         u32 nr_attrs, val;
5784 
5785         p = xdr_inline_decode(xdr, 28);
5786         if (unlikely(!p))
5787                 goto out_overflow;
5788         val = be32_to_cpup(p++);        /* headerpadsz */
5789         if (val)
5790                 return -EINVAL;         /* no support for header padding yet */
5791         attrs->max_rqst_sz = be32_to_cpup(p++);
5792         attrs->max_resp_sz = be32_to_cpup(p++);
5793         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5794         attrs->max_ops = be32_to_cpup(p++);
5795         attrs->max_reqs = be32_to_cpup(p++);
5796         nr_attrs = be32_to_cpup(p);
5797         if (unlikely(nr_attrs > 1)) {
5798                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5799                         "count %u\n", __func__, nr_attrs);
5800                 return -EINVAL;
5801         }
5802         if (nr_attrs == 1) {
5803                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5804                 if (unlikely(!p))
5805                         goto out_overflow;
5806         }
5807         return 0;
5808 out_overflow:
5809         print_overflow_msg(__func__, xdr);
5810         return -EIO;
5811 }
5812 
5813 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5814 {
5815         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5816 }
5817 
5818 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5819                                 struct nfs41_bind_conn_to_session_res *res)
5820 {
5821         __be32 *p;
5822         int status;
5823 
5824         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5825         if (!status)
5826                 status = decode_sessionid(xdr, &res->sessionid);
5827         if (unlikely(status))
5828                 return status;
5829 
5830         /* dir flags, rdma mode bool */
5831         p = xdr_inline_decode(xdr, 8);
5832         if (unlikely(!p))
5833                 goto out_overflow;
5834 
5835         res->dir = be32_to_cpup(p++);
5836         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5837                 return -EIO;
5838         if (be32_to_cpup(p) == 0)
5839                 res->use_conn_in_rdma_mode = false;
5840         else
5841                 res->use_conn_in_rdma_mode = true;
5842 
5843         return 0;
5844 out_overflow:
5845         print_overflow_msg(__func__, xdr);
5846         return -EIO;
5847 }
5848 
5849 static int decode_create_session(struct xdr_stream *xdr,
5850                                  struct nfs41_create_session_res *res)
5851 {
5852         __be32 *p;
5853         int status;
5854 
5855         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5856         if (!status)
5857                 status = decode_sessionid(xdr, &res->sessionid);
5858         if (unlikely(status))
5859                 return status;
5860 
5861         /* seqid, flags */
5862         p = xdr_inline_decode(xdr, 8);
5863         if (unlikely(!p))
5864                 goto out_overflow;
5865         res->seqid = be32_to_cpup(p++);
5866         res->flags = be32_to_cpup(p);
5867 
5868         /* Channel attributes */
5869         status = decode_chan_attrs(xdr, &res->fc_attrs);
5870         if (!status)
5871                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5872         return status;
5873 out_overflow:
5874         print_overflow_msg(__func__, xdr);
5875         return -EIO;
5876 }
5877 
5878 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5879 {
5880         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5881 }
5882 
5883 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5884 {
5885         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5886 }
5887 
5888 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5889 {
5890         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5891 }
5892 #endif /* CONFIG_NFS_V4_1 */
5893 
5894 static int decode_sequence(struct xdr_stream *xdr,
5895                            struct nfs4_sequence_res *res,
5896                            struct rpc_rqst *rqstp)
5897 {
5898 #if defined(CONFIG_NFS_V4_1)
5899         struct nfs4_session *session;
5900         struct nfs4_sessionid id;
5901         u32 dummy;
5902         int status;
5903         __be32 *p;
5904 
5905         if (res->sr_slot == NULL)
5906                 return 0;
5907         if (!res->sr_slot->table->session)
5908                 return 0;
5909 
5910         status = decode_op_hdr(xdr, OP_SEQUENCE);
5911         if (!status)
5912                 status = decode_sessionid(xdr, &id);
5913         if (unlikely(status))
5914                 goto out_err;
5915 
5916         /*
5917          * If the server returns different values for sessionID, slotID or
5918          * sequence number, the server is looney tunes.
5919          */
5920         status = -EREMOTEIO;
5921         session = res->sr_slot->table->session;
5922 
5923         if (memcmp(id.data, session->sess_id.data,
5924                    NFS4_MAX_SESSIONID_LEN)) {
5925                 dprintk("%s Invalid session id\n", __func__);
5926                 goto out_err;
5927         }
5928 
5929         p = xdr_inline_decode(xdr, 20);
5930         if (unlikely(!p))
5931                 goto out_overflow;
5932 
5933         /* seqid */
5934         dummy = be32_to_cpup(p++);
5935         if (dummy != res->sr_slot->seq_nr) {
5936                 dprintk("%s Invalid sequence number\n", __func__);
5937                 goto out_err;
5938         }
5939         /* slot id */
5940         dummy = be32_to_cpup(p++);
5941         if (dummy != res->sr_slot->slot_nr) {
5942                 dprintk("%s Invalid slot id\n", __func__);
5943                 goto out_err;
5944         }
5945         /* highest slot id */
5946         res->sr_highest_slotid = be32_to_cpup(p++);
5947         /* target highest slot id */
5948         res->sr_target_highest_slotid = be32_to_cpup(p++);
5949         /* result flags */
5950         res->sr_status_flags = be32_to_cpup(p);
5951         status = 0;
5952 out_err:
5953         res->sr_status = status;
5954         return status;
5955 out_overflow:
5956         print_overflow_msg(__func__, xdr);
5957         status = -EIO;
5958         goto out_err;
5959 #else  /* CONFIG_NFS_V4_1 */
5960         return 0;
5961 #endif /* CONFIG_NFS_V4_1 */
5962 }
5963 
5964 #if defined(CONFIG_NFS_V4_1)
5965 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5966 {
5967         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5968         return decode_stateid(xdr, stateid);
5969 }
5970 
5971 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5972                                 struct nfs4_getdeviceinfo_res *res)
5973 {
5974         struct pnfs_device *pdev = res->pdev;
5975         __be32 *p;
5976         uint32_t len, type;
5977         int status;
5978 
5979         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5980         if (status) {
5981                 if (status == -ETOOSMALL) {
5982                         p = xdr_inline_decode(xdr, 4);