fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/fs_struct.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "nfs4idmap.h"
  60 #include "nfs4session.h"
  61 #include "pnfs.h"
  62 #include "netns.h"
  63
  64 #define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66 /* Mapping from NFS error code to "errno" error code. */
  67 #define errno_NFSERR_IO         EIO
  68
  69 static int nfs4_stat_to_errno(int);
  70
  71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  72 #ifdef DEBUG
  73 #define NFS4_MAXTAGLEN          20
  74 #else
  75 #define NFS4_MAXTAGLEN          0
  76 #endif
  77
  78 /* lock,open owner id:
  79  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  80  */
  81 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  82 #define lock_owner_id_maxsz     (1 + 1 + 4)
  83 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  84 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  86 #define op_encode_hdr_maxsz     (1)
  87 #define op_decode_hdr_maxsz     (2)
  88 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  90 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  92 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  93                                 (NFS4_FHSIZE >> 2))
  94 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  95 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  96 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  97 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  98 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  99                                 ((3+NFS4_FHSIZE) >> 2))
 100 #define nfs4_fattr_bitmap_maxsz 4
 101 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 102 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109 #else
 110 #define nfs4_label_maxsz        0
 111 #endif
 112 /* We support only one layout type per file system */
 113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114 /* This is based on getfattr, which uses the most attributes: */
 115 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 117                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 118                                  decode_mdsthreshold_maxsz))
 119 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 120                                 nfs4_fattr_value_maxsz)
 121 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 122 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 123                                  1 + 2 + 1 + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + \
 126                                 nfs4_label_maxsz + \
 127                                 4 + 4)
 128 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 129 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 130 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 131 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 132 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 134  * layout types will be returned.
 135  */
 136 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 137                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 138 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 139 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 140 #define encode_setclientid_maxsz \
 141                                 (op_encode_hdr_maxsz + \
 142                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 143                                 /* client name */ \
 144                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 145                                 1 /* sc_prog */ + \
 146                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 147                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 148                                 1) /* sc_cb_ident */
 149 #define decode_setclientid_maxsz \
 150                                 (op_decode_hdr_maxsz + \
 151                                 2 /* clientid */ + \
 152                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 153                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 154                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                 decode_ace_maxsz)
 175 #define decode_change_info_maxsz        (5)
 176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                 decode_stateid_maxsz + \
 178                                 decode_change_info_maxsz + 1 + \
 179                                 nfs4_fattr_bitmap_maxsz + \
 180                                 decode_delegation_maxsz)
 181 #define encode_open_confirm_maxsz \
 182                                 (op_encode_hdr_maxsz + \
 183                                  encode_stateid_maxsz + 1)
 184 #define decode_open_confirm_maxsz \
 185                                 (op_decode_hdr_maxsz + \
 186                                  decode_stateid_maxsz)
 187 #define encode_open_downgrade_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1 + \
 190                                  encode_share_access_maxsz)
 191 #define decode_open_downgrade_maxsz \
 192                                 (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                  1 + encode_stateid_maxsz)
 196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                  decode_stateid_maxsz)
 198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                  encode_stateid_maxsz + \
 200                                  encode_attrs_maxsz)
 201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                  nfs4_fattr_bitmap_maxsz)
 203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 3)
 205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                  2 + encode_verifier_maxsz + 5 + \
 208                                 nfs4_label_maxsz)
 209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                  decode_verifier_maxsz)
 211 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 212 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 213 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 214                                  encode_stateid_maxsz + 4)
 215 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 216                                  2 + decode_verifier_maxsz)
 217 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 218 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 219                                  decode_verifier_maxsz)
 220 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 221                                 nfs4_name_maxsz)
 222 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 223                                  decode_change_info_maxsz)
 224 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 225                                 2 * nfs4_name_maxsz)
 226 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 227                                  decode_change_info_maxsz + \
 228                                  decode_change_info_maxsz)
 229 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 230                                 nfs4_name_maxsz)
 231 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 232 #define encode_lockowner_maxsz  (7)
 233 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 234                                  7 + \
 235                                  1 + encode_stateid_maxsz + 1 + \
 236                                  encode_lockowner_maxsz)
 237 #define decode_lock_denied_maxsz \
 238                                 (8 + decode_lockowner_maxsz)
 239 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 240                                  decode_lock_denied_maxsz)
 241 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 242                                 encode_lockowner_maxsz)
 243 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 244                                  decode_lock_denied_maxsz)
 245 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 246                                  encode_stateid_maxsz + \
 247                                  4)
 248 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 249                                  decode_stateid_maxsz)
 250 #define encode_release_lockowner_maxsz \
 251                                 (op_encode_hdr_maxsz + \
 252                                  encode_lockowner_maxsz)
 253 #define decode_release_lockowner_maxsz \
 254                                 (op_decode_hdr_maxsz)
 255 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 256 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 257 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 258                                 1 + nfs4_name_maxsz + \
 259                                 1 + \
 260                                 nfs4_fattr_maxsz)
 261 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 262 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 263                                 1 + 2 + nfs4_name_maxsz + \
 264                                 encode_attrs_maxsz)
 265 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 266                                 decode_change_info_maxsz + \
 267                                 nfs4_fattr_bitmap_maxsz)
 268 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 269 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 270 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 271 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 272 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 273 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 274                                  nfs4_fattr_bitmap_maxsz + 1)
 275 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 276                                  encode_stateid_maxsz + 3)
 277 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 278 #define encode_fs_locations_maxsz \
 279                                 (encode_getattr_maxsz)
 280 #define decode_fs_locations_maxsz \
 281                                 (0)
 282 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 283 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 284
 285 #if defined(CONFIG_NFS_V4_1)
 286 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 287 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 288                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 289
 290 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 291                                 encode_verifier_maxsz + \
 292                                 1 /* co_ownerid.len */ + \
 293                                 /* eia_clientowner */ \
 294                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 295                                 1 /* flags */ + \
 296                                 1 /* spa_how */ + \
 297                                 /* max is SP4_MACH_CRED (for now) */ + \
 298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 300                                 1 /* implementation id array of size 1 */ + \
 301                                 1 /* nii_domain */ + \
 302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                 1 /* nii_name */ + \
 304                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 305                                 3 /* nii_date */)
 306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 307                                 2 /* eir_clientid */ + \
 308                                 1 /* eir_sequenceid */ + \
 309                                 1 /* eir_flags */ + \
 310                                 1 /* spr_how */ + \
 311                                   /* max is SP4_MACH_CRED (for now) */ + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 314                                 2 /* eir_server_owner.so_minor_id */ + \
 315                                 /* eir_server_owner.so_major_id<> */ \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 317                                 /* eir_server_scope<> */ \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                 1 /* eir_server_impl_id array length */ + \
 320                                 1 /* nii_domain */ + \
 321                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 322                                 1 /* nii_name */ + \
 323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                 3 /* nii_date */)
 325 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 326 #define decode_channel_attrs_maxsz  (6 + \
 327                                      1 /* ca_rdma_ird.len */ + \
 328                                      1 /* ca_rdma_ird */)
 329 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 330                                      2 /* csa_clientid */ + \
 331                                      1 /* csa_sequence */ + \
 332                                      1 /* csa_flags */ + \
 333                                      encode_channel_attrs_maxsz + \
 334                                      encode_channel_attrs_maxsz + \
 335                                      1 /* csa_cb_program */ + \
 336                                      1 /* csa_sec_parms.len (1) */ + \
 337                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 338                                      1 /* stamp */ + \
 339                                      1 /* machinename.len */ + \
 340                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 341                                      1 /* uid */ + \
 342                                      1 /* gid */ + \
 343                                      1 /* gids.len (0) */)
 344 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 345                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 346                                      1 /* csr_sequence */ + \
 347                                      1 /* csr_flags */ + \
 348                                      decode_channel_attrs_maxsz + \
 349                                      decode_channel_attrs_maxsz)
 350 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 351                                      /* bctsa_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsa_dir */ + \
 354                                      1 /* bctsa_use_conn_in_rdma_mode */)
 355 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 356                                      /* bctsr_sessid */ \
 357                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 358                                      1 /* bctsr_dir */ + \
 359                                      1 /* bctsr_use_conn_in_rdma_mode */)
 360 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 361 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 362 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 363 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 364 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 365                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 366 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 368 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 369 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 370 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 371                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 372                                 1 /* layout type */ + \
 373                                 1 /* maxcount */ + \
 374                                 1 /* bitmap size */ + \
 375                                 1 /* notification bitmap length */ + \
 376                                 1 /* notification bitmap, word 0 */)
 377 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 378                                 1 /* layout type */ + \
 379                                 1 /* opaque devaddr4 length */ + \
 380                                   /* devaddr4 payload is read into page */ \
 381                                 1 /* notification bitmap length */ + \
 382                                 1 /* notification bitmap, word 0 */)
 383 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 384                                 encode_stateid_maxsz)
 385 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 386                                 decode_stateid_maxsz + \
 387                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 388 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 389                                 2 /* offset */ + \
 390                                 2 /* length */ + \
 391                                 1 /* reclaim */ + \
 392                                 encode_stateid_maxsz + \
 393                                 1 /* new offset (true) */ + \
 394                                 2 /* last byte written */ + \
 395                                 1 /* nt_timechanged (false) */ + \
 396                                 1 /* layoutupdate4 layout type */ + \
 397                                 1 /* layoutupdate4 opaqueue len */)
 398                                   /* the actual content of layoutupdate4 should
 399                                      be allocated by drivers and spliced in
 400                                      using xdr_write_pages */
 401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 403                                 encode_stateid_maxsz + \
 404                                 1 + \
 405                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 407                                 1 + decode_stateid_maxsz)
 408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 410 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 411                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 412 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 413 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 414                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 415 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 416 #else /* CONFIG_NFS_V4_1 */
 417 #define encode_sequence_maxsz   0
 418 #define decode_sequence_maxsz   0
 419 #define encode_layoutreturn_maxsz 0
 420 #define decode_layoutreturn_maxsz 0
 421 #endif /* CONFIG_NFS_V4_1 */
 422
 423 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 424 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 425 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_read_maxsz)
 429 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_read_maxsz)
 433 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_readlink_maxsz)
 437 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_readlink_maxsz)
 441 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_readdir_maxsz)
 445 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_readdir_maxsz)
 449 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_write_maxsz + \
 453                                 encode_getattr_maxsz)
 454 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 455                                 decode_sequence_maxsz + \
 456                                 decode_putfh_maxsz + \
 457                                 decode_write_maxsz + \
 458                                 decode_getattr_maxsz)
 459 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_commit_maxsz)
 463 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 464                                 decode_sequence_maxsz + \
 465                                 decode_putfh_maxsz + \
 466                                 decode_commit_maxsz)
 467 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 468                                 encode_sequence_maxsz + \
 469                                 encode_putfh_maxsz + \
 470                                 encode_open_maxsz + \
 471                                 encode_access_maxsz + \
 472                                 encode_getfh_maxsz + \
 473                                 encode_getattr_maxsz)
 474 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 475                                 decode_sequence_maxsz + \
 476                                 decode_putfh_maxsz + \
 477                                 decode_open_maxsz + \
 478                                 decode_access_maxsz + \
 479                                 decode_getfh_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_open_confirm_sz \
 482                                 (compound_encode_hdr_maxsz + \
 483                                  encode_putfh_maxsz + \
 484                                  encode_open_confirm_maxsz)
 485 #define NFS4_dec_open_confirm_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_putfh_maxsz + \
 488                                  decode_open_confirm_maxsz)
 489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 490                                         encode_sequence_maxsz + \
 491                                         encode_putfh_maxsz + \
 492                                         encode_open_maxsz + \
 493                                         encode_access_maxsz + \
 494                                         encode_getattr_maxsz)
 495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 496                                         decode_sequence_maxsz + \
 497                                         decode_putfh_maxsz + \
 498                                         decode_open_maxsz + \
 499                                         decode_access_maxsz + \
 500                                         decode_getattr_maxsz)
 501 #define NFS4_enc_open_downgrade_sz \
 502                                 (compound_encode_hdr_maxsz + \
 503                                  encode_sequence_maxsz + \
 504                                  encode_putfh_maxsz + \
 505                                  encode_layoutreturn_maxsz + \
 506                                  encode_open_downgrade_maxsz)
 507 #define NFS4_dec_open_downgrade_sz \
 508                                 (compound_decode_hdr_maxsz + \
 509                                  decode_sequence_maxsz + \
 510                                  decode_putfh_maxsz + \
 511                                  decode_layoutreturn_maxsz + \
 512                                  decode_open_downgrade_maxsz)
 513 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 514                                  encode_sequence_maxsz + \
 515                                  encode_putfh_maxsz + \
 516                                  encode_layoutreturn_maxsz + \
 517                                  encode_close_maxsz + \
 518                                  encode_getattr_maxsz)
 519 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 520                                  decode_sequence_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_layoutreturn_maxsz + \
 523                                  decode_close_maxsz + \
 524                                  decode_getattr_maxsz)
 525 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 526                                  encode_sequence_maxsz + \
 527                                  encode_putfh_maxsz + \
 528                                  encode_setattr_maxsz + \
 529                                  encode_getattr_maxsz)
 530 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 531                                  decode_sequence_maxsz + \
 532                                  decode_putfh_maxsz + \
 533                                  decode_setattr_maxsz + \
 534                                  decode_getattr_maxsz)
 535 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 536                                 encode_sequence_maxsz + \
 537                                 encode_putfh_maxsz + \
 538                                 encode_fsinfo_maxsz)
 539 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 540                                 decode_sequence_maxsz + \
 541                                 decode_putfh_maxsz + \
 542                                 decode_fsinfo_maxsz)
 543 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 544                                 encode_renew_maxsz)
 545 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 546                                 decode_renew_maxsz)
 547 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 548                                 encode_setclientid_maxsz)
 549 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 550                                 decode_setclientid_maxsz)
 551 #define NFS4_enc_setclientid_confirm_sz \
 552                                 (compound_encode_hdr_maxsz + \
 553                                 encode_setclientid_confirm_maxsz)
 554 #define NFS4_dec_setclientid_confirm_sz \
 555                                 (compound_decode_hdr_maxsz + \
 556                                 decode_setclientid_confirm_maxsz)
 557 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_lock_maxsz)
 561 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_lock_maxsz)
 565 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 566                                 encode_sequence_maxsz + \
 567                                 encode_putfh_maxsz + \
 568                                 encode_lockt_maxsz)
 569 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 570                                  decode_sequence_maxsz + \
 571                                  decode_putfh_maxsz + \
 572                                  decode_lockt_maxsz)
 573 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 574                                 encode_sequence_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_locku_maxsz)
 577 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 578                                 decode_sequence_maxsz + \
 579                                 decode_putfh_maxsz + \
 580                                 decode_locku_maxsz)
 581 #define NFS4_enc_release_lockowner_sz \
 582                                 (compound_encode_hdr_maxsz + \
 583                                  encode_lockowner_maxsz)
 584 #define NFS4_dec_release_lockowner_sz \
 585                                 (compound_decode_hdr_maxsz + \
 586                                  decode_lockowner_maxsz)
 587 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 588                                 encode_sequence_maxsz + \
 589                                 encode_putfh_maxsz + \
 590                                 encode_access_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_access_maxsz + \
 596                                 decode_getattr_maxsz)
 597 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putfh_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_renew_maxsz)
 602 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 603                                 decode_sequence_maxsz + \
 604                                 decode_putfh_maxsz + \
 605                                 decode_getattr_maxsz + \
 606                                 decode_renew_maxsz)
 607 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_lookup_maxsz + \
 611                                 encode_getattr_maxsz + \
 612                                 encode_getfh_maxsz)
 613 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 614                                 decode_sequence_maxsz + \
 615                                 decode_putfh_maxsz + \
 616                                 decode_lookup_maxsz + \
 617                                 decode_getattr_maxsz + \
 618                                 decode_getfh_maxsz)
 619 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putrootfh_maxsz + \
 622                                 encode_getattr_maxsz + \
 623                                 encode_getfh_maxsz)
 624 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putrootfh_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_getfh_maxsz)
 629 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_remove_maxsz)
 633 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_remove_maxsz)
 637 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_savefh_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_rename_maxsz)
 643 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 644                                 decode_sequence_maxsz + \
 645                                 decode_putfh_maxsz + \
 646                                 decode_savefh_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_rename_maxsz)
 649 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 650                                 encode_sequence_maxsz + \
 651                                 encode_putfh_maxsz + \
 652                                 encode_savefh_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_link_maxsz + \
 655                                 encode_restorefh_maxsz + \
 656                                 encode_getattr_maxsz)
 657 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 658                                 decode_sequence_maxsz + \
 659                                 decode_putfh_maxsz + \
 660                                 decode_savefh_maxsz + \
 661                                 decode_putfh_maxsz + \
 662                                 decode_link_maxsz + \
 663                                 decode_restorefh_maxsz + \
 664                                 decode_getattr_maxsz)
 665 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 666                                 encode_sequence_maxsz + \
 667                                 encode_putfh_maxsz + \
 668                                 encode_symlink_maxsz + \
 669                                 encode_getattr_maxsz + \
 670                                 encode_getfh_maxsz)
 671 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 672                                 decode_sequence_maxsz + \
 673                                 decode_putfh_maxsz + \
 674                                 decode_symlink_maxsz + \
 675                                 decode_getattr_maxsz + \
 676                                 decode_getfh_maxsz)
 677 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 678                                 encode_sequence_maxsz + \
 679                                 encode_putfh_maxsz + \
 680                                 encode_create_maxsz + \
 681                                 encode_getfh_maxsz + \
 682                                 encode_getattr_maxsz)
 683 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 684                                 decode_sequence_maxsz + \
 685                                 decode_putfh_maxsz + \
 686                                 decode_create_maxsz + \
 687                                 decode_getfh_maxsz + \
 688                                 decode_getattr_maxsz)
 689 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 690                                 encode_sequence_maxsz + \
 691                                 encode_putfh_maxsz + \
 692                                 encode_getattr_maxsz)
 693 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_putfh_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_statfs_maxsz)
 701 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_statfs_maxsz)
 705 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_getattr_maxsz)
 709 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 710                                 decode_sequence_maxsz + \
 711                                 decode_putfh_maxsz + \
 712                                 decode_getattr_maxsz)
 713 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 714                                 encode_sequence_maxsz + \
 715                                 encode_putfh_maxsz + \
 716                                 encode_layoutreturn_maxsz + \
 717                                 encode_delegreturn_maxsz + \
 718                                 encode_getattr_maxsz)
 719 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 720                                 decode_sequence_maxsz + \
 721                                 decode_putfh_maxsz + \
 722                                 decode_layoutreturn_maxsz + \
 723                                 decode_delegreturn_maxsz + \
 724                                 decode_getattr_maxsz)
 725 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 726                                 encode_sequence_maxsz + \
 727                                 encode_putfh_maxsz + \
 728                                 encode_getacl_maxsz)
 729 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_getacl_maxsz)
 733 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 734                                 encode_sequence_maxsz + \
 735                                 encode_putfh_maxsz + \
 736                                 encode_setacl_maxsz)
 737 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 738                                 decode_sequence_maxsz + \
 739                                 decode_putfh_maxsz + \
 740                                 decode_setacl_maxsz)
 741 #define NFS4_enc_fs_locations_sz \
 742                                 (compound_encode_hdr_maxsz + \
 743                                  encode_sequence_maxsz + \
 744                                  encode_putfh_maxsz + \
 745                                  encode_lookup_maxsz + \
 746                                  encode_fs_locations_maxsz + \
 747                                  encode_renew_maxsz)
 748 #define NFS4_dec_fs_locations_sz \
 749                                 (compound_decode_hdr_maxsz + \
 750                                  decode_sequence_maxsz + \
 751                                  decode_putfh_maxsz + \
 752                                  decode_lookup_maxsz + \
 753                                  decode_fs_locations_maxsz + \
 754                                  decode_renew_maxsz)
 755 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 756                                 encode_sequence_maxsz + \
 757                                 encode_putfh_maxsz + \
 758                                 encode_secinfo_maxsz)
 759 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 760                                 decode_sequence_maxsz + \
 761                                 decode_putfh_maxsz + \
 762                                 decode_secinfo_maxsz)
 763 #define NFS4_enc_fsid_present_sz \
 764                                 (compound_encode_hdr_maxsz + \
 765                                  encode_sequence_maxsz + \
 766                                  encode_putfh_maxsz + \
 767                                  encode_getfh_maxsz + \
 768                                  encode_renew_maxsz)
 769 #define NFS4_dec_fsid_present_sz \
 770                                 (compound_decode_hdr_maxsz + \
 771                                  decode_sequence_maxsz + \
 772                                  decode_putfh_maxsz + \
 773                                  decode_getfh_maxsz + \
 774                                  decode_renew_maxsz)
 775 #if defined(CONFIG_NFS_V4_1)
 776 #define NFS4_enc_bind_conn_to_session_sz \
 777                                 (compound_encode_hdr_maxsz + \
 778                                  encode_bind_conn_to_session_maxsz)
 779 #define NFS4_dec_bind_conn_to_session_sz \
 780                                 (compound_decode_hdr_maxsz + \
 781                                  decode_bind_conn_to_session_maxsz)
 782 #define NFS4_enc_exchange_id_sz \
 783                                 (compound_encode_hdr_maxsz + \
 784                                  encode_exchange_id_maxsz)
 785 #define NFS4_dec_exchange_id_sz \
 786                                 (compound_decode_hdr_maxsz + \
 787                                  decode_exchange_id_maxsz)
 788 #define NFS4_enc_create_session_sz \
 789                                 (compound_encode_hdr_maxsz + \
 790                                  encode_create_session_maxsz)
 791 #define NFS4_dec_create_session_sz \
 792                                 (compound_decode_hdr_maxsz + \
 793                                  decode_create_session_maxsz)
 794 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 795                                          encode_destroy_session_maxsz)
 796 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 797                                          decode_destroy_session_maxsz)
 798 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 799                                          encode_destroy_clientid_maxsz)
 800 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 801                                          decode_destroy_clientid_maxsz)
 802 #define NFS4_enc_sequence_sz \
 803                                 (compound_decode_hdr_maxsz + \
 804                                  encode_sequence_maxsz)
 805 #define NFS4_dec_sequence_sz \
 806                                 (compound_decode_hdr_maxsz + \
 807                                  decode_sequence_maxsz)
 808 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 809                                          encode_sequence_maxsz + \
 810                                          encode_putrootfh_maxsz + \
 811                                          encode_fsinfo_maxsz)
 812 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 813                                          decode_sequence_maxsz + \
 814                                          decode_putrootfh_maxsz + \
 815                                          decode_fsinfo_maxsz)
 816 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 817                                          encode_sequence_maxsz + \
 818                                          encode_reclaim_complete_maxsz)
 819 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 820                                          decode_sequence_maxsz + \
 821                                          decode_reclaim_complete_maxsz)
 822 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 823                                 encode_sequence_maxsz +\
 824                                 encode_getdeviceinfo_maxsz)
 825 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 826                                 decode_sequence_maxsz + \
 827                                 decode_getdeviceinfo_maxsz)
 828 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 829                                 encode_sequence_maxsz + \
 830                                 encode_putfh_maxsz +        \
 831                                 encode_layoutget_maxsz)
 832 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 833                                 decode_sequence_maxsz + \
 834                                 decode_putfh_maxsz +        \
 835                                 decode_layoutget_maxsz)
 836 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 837                                 encode_sequence_maxsz +\
 838                                 encode_putfh_maxsz + \
 839                                 encode_layoutcommit_maxsz + \
 840                                 encode_getattr_maxsz)
 841 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 842                                 decode_sequence_maxsz + \
 843                                 decode_putfh_maxsz + \
 844                                 decode_layoutcommit_maxsz + \
 845                                 decode_getattr_maxsz)
 846 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 847                                 encode_sequence_maxsz + \
 848                                 encode_putfh_maxsz + \
 849                                 encode_layoutreturn_maxsz)
 850 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 851                                 decode_sequence_maxsz + \
 852                                 decode_putfh_maxsz + \
 853                                 decode_layoutreturn_maxsz)
 854 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 855                                         encode_sequence_maxsz + \
 856                                         encode_putrootfh_maxsz +\
 857                                         encode_secinfo_no_name_maxsz)
 858 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 859                                         decode_sequence_maxsz + \
 860                                         decode_putrootfh_maxsz + \
 861                                         decode_secinfo_no_name_maxsz)
 862 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 863                                          encode_sequence_maxsz + \
 864                                          encode_test_stateid_maxsz)
 865 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 866                                          decode_sequence_maxsz + \
 867                                          decode_test_stateid_maxsz)
 868 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 869                                          encode_sequence_maxsz + \
 870                                          encode_free_stateid_maxsz)
 871 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 872                                          decode_sequence_maxsz + \
 873                                          decode_free_stateid_maxsz)
 874
 875 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 876                                       compound_encode_hdr_maxsz +
 877                                       encode_sequence_maxsz +
 878                                       encode_putfh_maxsz +
 879                                       encode_getattr_maxsz) *
 880                                      XDR_UNIT);
 881
 882 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 883                                      compound_decode_hdr_maxsz +
 884                                      decode_sequence_maxsz +
 885                                      decode_putfh_maxsz) *
 886                                     XDR_UNIT);
 887
 888 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 889                                            compound_decode_hdr_maxsz +
 890                                            decode_sequence_maxsz) *
 891                                           XDR_UNIT);
 892 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 893 #endif /* CONFIG_NFS_V4_1 */
 894
 895 static const umode_t nfs_type2fmt[] = {
 896         [NF4BAD] = 0,
 897         [NF4REG] = S_IFREG,
 898         [NF4DIR] = S_IFDIR,
 899         [NF4BLK] = S_IFBLK,
 900         [NF4CHR] = S_IFCHR,
 901         [NF4LNK] = S_IFLNK,
 902         [NF4SOCK] = S_IFSOCK,
 903         [NF4FIFO] = S_IFIFO,
 904         [NF4ATTRDIR] = 0,
 905         [NF4NAMEDATTR] = 0,
 906 };
 907
 908 struct compound_hdr {
 909         int32_t         status;
 910         uint32_t        nops;
 911         __be32 *        nops_p;
 912         uint32_t        taglen;
 913         char *          tag;
 914         uint32_t        replen;         /* expected reply words */
 915         u32             minorversion;
 916 };
 917
 918 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 919 {
 920         __be32 *p = xdr_reserve_space(xdr, nbytes);
 921         BUG_ON(!p);
 922         return p;
 923 }
 924
 925 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 926 {
 927         __be32 *p;
 928
 929         p = xdr_reserve_space(xdr, len);
 930         xdr_encode_opaque_fixed(p, buf, len);
 931 }
 932
 933 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 934 {
 935         __be32 *p;
 936
 937         p = reserve_space(xdr, 4 + len);
 938         xdr_encode_opaque(p, str, len);
 939 }
 940
 941 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 942 {
 943         __be32 *p;
 944
 945         p = reserve_space(xdr, 4);
 946         *p = cpu_to_be32(n);
 947 }
 948
 949 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 950 {
 951         __be32 *p;
 952
 953         p = reserve_space(xdr, 8);
 954         xdr_encode_hyper(p, n);
 955 }
 956
 957 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 958                 const struct nfs_seqid *seqid)
 959 {
 960         if (seqid != NULL)
 961                 encode_uint32(xdr, seqid->sequence->counter);
 962         else
 963                 encode_uint32(xdr, 0);
 964 }
 965
 966 static void encode_compound_hdr(struct xdr_stream *xdr,
 967                                 struct rpc_rqst *req,
 968                                 struct compound_hdr *hdr)
 969 {
 970         __be32 *p;
 971         struct rpc_auth *auth = req->rq_cred->cr_auth;
 972
 973         /* initialize running count of expected bytes in reply.
 974          * NOTE: the replied tag SHOULD be the same is the one sent,
 975          * but this is not required as a MUST for the server to do so. */
 976         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 977
 978         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 979         encode_string(xdr, hdr->taglen, hdr->tag);
 980         p = reserve_space(xdr, 8);
 981         *p++ = cpu_to_be32(hdr->minorversion);
 982         hdr->nops_p = p;
 983         *p = cpu_to_be32(hdr->nops);
 984 }
 985
 986 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 987                 uint32_t replen,
 988                 struct compound_hdr *hdr)
 989 {
 990         encode_uint32(xdr, op);
 991         hdr->nops++;
 992         hdr->replen += replen;
 993 }
 994
 995 static void encode_nops(struct compound_hdr *hdr)
 996 {
 997         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 998         *hdr->nops_p = htonl(hdr->nops);
 999 }
1000
1001 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002 {
1003         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004 }
1005
1006 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007 {
1008         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009 }
1010
1011 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012                                 const struct nfs4_label *label,
1013                                 const struct nfs_server *server,
1014                                 bool excl_check, const umode_t *umask)
1015 {
1016         char owner_name[IDMAP_NAMESZ];
1017         char owner_group[IDMAP_NAMESZ];
1018         int owner_namelen = 0;
1019         int owner_grouplen = 0;
1020         __be32 *p;
1021         unsigned i;
1022         uint32_t len = 0;
1023         uint32_t bmval_len;
1024         uint32_t bmval[3] = { 0 };
1025
1026         /*
1027          * We reserve enough space to write the entire attribute buffer at once.
1028          */
1029         if (iap->ia_valid & ATTR_SIZE) {
1030                 bmval[0] |= FATTR4_WORD0_SIZE;
1031                 len += 8;
1032         }
1033         if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034                 umask = NULL;
1035         if (iap->ia_valid & ATTR_MODE) {
1036                 if (umask) {
1037                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038                         len += 8;
1039                 } else {
1040                         bmval[1] |= FATTR4_WORD1_MODE;
1041                         len += 4;
1042                 }
1043         }
1044         if (iap->ia_valid & ATTR_UID) {
1045                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046                 if (owner_namelen < 0) {
1047                         dprintk("nfs: couldn't resolve uid %d to string\n",
1048                                         from_kuid(&init_user_ns, iap->ia_uid));
1049                         /* XXX */
1050                         strcpy(owner_name, "nobody");
1051                         owner_namelen = sizeof("nobody") - 1;
1052                         /* goto out; */
1053                 }
1054                 bmval[1] |= FATTR4_WORD1_OWNER;
1055                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056         }
1057         if (iap->ia_valid & ATTR_GID) {
1058                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059                 if (owner_grouplen < 0) {
1060                         dprintk("nfs: couldn't resolve gid %d to string\n",
1061                                         from_kgid(&init_user_ns, iap->ia_gid));
1062                         strcpy(owner_group, "nobody");
1063                         owner_grouplen = sizeof("nobody") - 1;
1064                         /* goto out; */
1065                 }
1066                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068         }
1069         if (iap->ia_valid & ATTR_ATIME_SET) {
1070                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071                 len += 16;
1072         } else if (iap->ia_valid & ATTR_ATIME) {
1073                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074                 len += 4;
1075         }
1076         if (iap->ia_valid & ATTR_MTIME_SET) {
1077                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                 len += 16;
1079         } else if (iap->ia_valid & ATTR_MTIME) {
1080                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081                 len += 4;
1082         }
1083
1084         if (excl_check) {
1085                 const u32 *excl_bmval = server->exclcreat_bitmask;
1086                 bmval[0] &= excl_bmval[0];
1087                 bmval[1] &= excl_bmval[1];
1088                 bmval[2] &= excl_bmval[2];
1089
1090                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091                         label = NULL;
1092         }
1093
1094         if (label) {
1095                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097         }
1098
1099         if (bmval[2] != 0)
1100                 bmval_len = 3;
1101         else if (bmval[1] != 0)
1102                 bmval_len = 2;
1103         else
1104                 bmval_len = 1;
1105
1106         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107
1108         *p++ = cpu_to_be32(bmval_len);
1109         for (i = 0; i < bmval_len; i++)
1110                 *p++ = cpu_to_be32(bmval[i]);
1111         *p++ = cpu_to_be32(len);
1112
1113         if (bmval[0] & FATTR4_WORD0_SIZE)
1114                 p = xdr_encode_hyper(p, iap->ia_size);
1115         if (bmval[1] & FATTR4_WORD1_MODE)
1116                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117         if (bmval[1] & FATTR4_WORD1_OWNER)
1118                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122                 if (iap->ia_valid & ATTR_ATIME_SET) {
1123                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126                 } else
1127                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128         }
1129         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130                 if (iap->ia_valid & ATTR_MTIME_SET) {
1131                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134                 } else
1135                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136         }
1137         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138                 *p++ = cpu_to_be32(label->lfs);
1139                 *p++ = cpu_to_be32(label->pi);
1140                 *p++ = cpu_to_be32(label->len);
1141                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142         }
1143         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145                 *p++ = cpu_to_be32(*umask);
1146         }
1147
1148 /* out: */
1149 }
1150
1151 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152 {
1153         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154         encode_uint32(xdr, access);
1155 }
1156
1157 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158 {
1159         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160         encode_nfs4_seqid(xdr, arg->seqid);
1161         encode_nfs4_stateid(xdr, &arg->stateid);
1162 }
1163
1164 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165 {
1166         __be32 *p;
1167
1168         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169         p = reserve_space(xdr, 12);
1170         p = xdr_encode_hyper(p, args->offset);
1171         *p = cpu_to_be32(args->count);
1172 }
1173
1174 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175 {
1176         __be32 *p;
1177
1178         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179         encode_uint32(xdr, create->ftype);
1180
1181         switch (create->ftype) {
1182         case NF4LNK:
1183                 p = reserve_space(xdr, 4);
1184                 *p = cpu_to_be32(create->u.symlink.len);
1185                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186                                 create->u.symlink.len);
1187                 xdr->buf->flags |= XDRBUF_WRITE;
1188                 break;
1189
1190         case NF4BLK: case NF4CHR:
1191                 p = reserve_space(xdr, 8);
1192                 *p++ = cpu_to_be32(create->u.device.specdata1);
1193                 *p = cpu_to_be32(create->u.device.specdata2);
1194                 break;
1195
1196         default:
1197                 break;
1198         }
1199
1200         encode_string(xdr, create->name->len, create->name->name);
1201         encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202                      &create->umask);
1203 }
1204
1205 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206 {
1207         __be32 *p;
1208
1209         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210         p = reserve_space(xdr, 8);
1211         *p++ = cpu_to_be32(1);
1212         *p = cpu_to_be32(bitmap);
1213 }
1214
1215 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216 {
1217         __be32 *p;
1218
1219         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220         p = reserve_space(xdr, 12);
1221         *p++ = cpu_to_be32(2);
1222         *p++ = cpu_to_be32(bm0);
1223         *p = cpu_to_be32(bm1);
1224 }
1225
1226 static void
1227 encode_getattr_three(struct xdr_stream *xdr,
1228                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229                      struct compound_hdr *hdr)
1230 {
1231         __be32 *p;
1232
1233         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234         if (bm2) {
1235                 p = reserve_space(xdr, 16);
1236                 *p++ = cpu_to_be32(3);
1237                 *p++ = cpu_to_be32(bm0);
1238                 *p++ = cpu_to_be32(bm1);
1239                 *p = cpu_to_be32(bm2);
1240         } else if (bm1) {
1241                 p = reserve_space(xdr, 12);
1242                 *p++ = cpu_to_be32(2);
1243                 *p++ = cpu_to_be32(bm0);
1244                 *p = cpu_to_be32(bm1);
1245         } else {
1246                 p = reserve_space(xdr, 8);
1247                 *p++ = cpu_to_be32(1);
1248                 *p = cpu_to_be32(bm0);
1249         }
1250 }
1251
1252 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253 {
1254         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255                            bitmask[1] & nfs4_fattr_bitmap[1],
1256                            bitmask[2] & nfs4_fattr_bitmap[2],
1257                            hdr);
1258 }
1259
1260 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261                                  const u32 *open_bitmap,
1262                                  struct compound_hdr *hdr)
1263 {
1264         encode_getattr_three(xdr,
1265                              bitmask[0] & open_bitmap[0],
1266                              bitmask[1] & open_bitmap[1],
1267                              bitmask[2] & open_bitmap[2],
1268                              hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273         encode_getattr_three(xdr,
1274                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1275                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1276                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1277                              hdr);
1278 }
1279
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284 }
1285
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294         encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299         if (fl->fl_type == F_RDLCK)
1300                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306         if (fl->fl_end == OFFSET_MAX)
1307                 return ~(uint64_t)0;
1308         return fl->fl_end - fl->fl_start + 1;
1309 }
1310
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313         __be32 *p;
1314
1315         p = reserve_space(xdr, 32);
1316         p = xdr_encode_hyper(p, lowner->clientid);
1317         *p++ = cpu_to_be32(20);
1318         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319         *p++ = cpu_to_be32(lowner->s_dev);
1320         xdr_encode_hyper(p, lowner->id);
1321 }
1322
1323 /*
1324  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326  */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329         __be32 *p;
1330
1331         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332         p = reserve_space(xdr, 28);
1333         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334         *p++ = cpu_to_be32(args->reclaim);
1335         p = xdr_encode_hyper(p, args->fl->fl_start);
1336         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337         *p = cpu_to_be32(args->new_lock_owner);
1338         if (args->new_lock_owner){
1339                 encode_nfs4_seqid(xdr, args->open_seqid);
1340                 encode_nfs4_stateid(xdr, &args->open_stateid);
1341                 encode_nfs4_seqid(xdr, args->lock_seqid);
1342                 encode_lockowner(xdr, &args->lock_owner);
1343         }
1344         else {
1345                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346                 encode_nfs4_seqid(xdr, args->lock_seqid);
1347         }
1348 }
1349
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352         __be32 *p;
1353
1354         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355         p = reserve_space(xdr, 20);
1356         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357         p = xdr_encode_hyper(p, args->fl->fl_start);
1358         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359         encode_lockowner(xdr, &args->lock_owner);
1360 }
1361
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368         encode_nfs4_seqid(xdr, args->seqid);
1369         encode_nfs4_stateid(xdr, &args->stateid);
1370         p = reserve_space(xdr, 16);
1371         p = xdr_encode_hyper(p, args->fl->fl_start);
1372         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378         encode_lockowner(xdr, lowner);
1379 }
1380
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384         encode_string(xdr, name->len, name->name);
1385 }
1386
1387 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388 {
1389         __be32 *p;
1390
1391         p = reserve_space(xdr, 8);
1392         *p++ = cpu_to_be32(share_access);
1393         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1394 }
1395
1396 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398         __be32 *p;
1399  /*
1400  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401  * owner 4 = 32
1402  */
1403         encode_nfs4_seqid(xdr, arg->seqid);
1404         encode_share_access(xdr, arg->share_access);
1405         p = reserve_space(xdr, 36);
1406         p = xdr_encode_hyper(p, arg->clientid);
1407         *p++ = cpu_to_be32(24);
1408         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409         *p++ = cpu_to_be32(arg->server->s_dev);
1410         *p++ = cpu_to_be32(arg->id.uniquifier);
1411         xdr_encode_hyper(p, arg->id.create_time);
1412 }
1413
1414 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch(arg->createmode) {
1420         case NFS4_CREATE_UNCHECKED:
1421                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423                              &arg->umask);
1424                 break;
1425         case NFS4_CREATE_GUARDED:
1426                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428                              &arg->umask);
1429                 break;
1430         case NFS4_CREATE_EXCLUSIVE:
1431                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1433                 break;
1434         case NFS4_CREATE_EXCLUSIVE4_1:
1435                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438                              &arg->umask);
1439         }
1440 }
1441
1442 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443 {
1444         __be32 *p;
1445
1446         p = reserve_space(xdr, 4);
1447         switch (arg->open_flags & O_CREAT) {
1448         case 0:
1449                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450                 break;
1451         default:
1452                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453                 encode_createmode(xdr, arg);
1454         }
1455 }
1456
1457 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458 {
1459         __be32 *p;
1460
1461         p = reserve_space(xdr, 4);
1462         switch (delegation_type) {
1463         case 0:
1464                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465                 break;
1466         case FMODE_READ:
1467                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468                 break;
1469         case FMODE_WRITE|FMODE_READ:
1470                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471                 break;
1472         default:
1473                 BUG();
1474         }
1475 }
1476
1477 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478 {
1479         __be32 *p;
1480
1481         p = reserve_space(xdr, 4);
1482         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483         encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492         encode_delegation_type(xdr, type);
1493 }
1494
1495 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496 {
1497         __be32 *p;
1498
1499         p = reserve_space(xdr, 4);
1500         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501         encode_nfs4_stateid(xdr, stateid);
1502         encode_string(xdr, name->len, name->name);
1503 }
1504
1505 static inline void encode_claim_fh(struct xdr_stream *xdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511 }
1512
1513 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514 {
1515         __be32 *p;
1516
1517         p = reserve_space(xdr, 4);
1518         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519         encode_nfs4_stateid(xdr, stateid);
1520 }
1521
1522 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523 {
1524         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525         encode_openhdr(xdr, arg);
1526         encode_opentype(xdr, arg);
1527         switch (arg->claim) {
1528         case NFS4_OPEN_CLAIM_NULL:
1529                 encode_claim_null(xdr, arg->name);
1530                 break;
1531         case NFS4_OPEN_CLAIM_PREVIOUS:
1532                 encode_claim_previous(xdr, arg->u.delegation_type);
1533                 break;
1534         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536                 break;
1537         case NFS4_OPEN_CLAIM_FH:
1538                 encode_claim_fh(xdr);
1539                 break;
1540         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542                 break;
1543         default:
1544                 BUG();
1545         }
1546 }
1547
1548 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551         encode_nfs4_stateid(xdr, arg->stateid);
1552         encode_nfs4_seqid(xdr, arg->seqid);
1553 }
1554
1555 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556 {
1557         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558         encode_nfs4_stateid(xdr, &arg->stateid);
1559         encode_nfs4_seqid(xdr, arg->seqid);
1560         encode_share_access(xdr, arg->share_access);
1561 }
1562
1563 static void
1564 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565 {
1566         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567         encode_string(xdr, fh->size, fh->data);
1568 }
1569
1570 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571 {
1572         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573 }
1574
1575 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576                         struct compound_hdr *hdr)
1577 {
1578         __be32 *p;
1579
1580         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581         encode_nfs4_stateid(xdr, &args->stateid);
1582
1583         p = reserve_space(xdr, 12);
1584         p = xdr_encode_hyper(p, args->offset);
1585         *p = cpu_to_be32(args->count);
1586 }
1587
1588 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589 {
1590         uint32_t attrs[3] = {
1591                 FATTR4_WORD0_RDATTR_ERROR,
1592                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1593         };
1594         uint32_t dircount = readdir->count >> 1;
1595         __be32 *p, verf[2];
1596         uint32_t attrlen = 0;
1597         unsigned int i;
1598
1599         if (readdir->plus) {
1600                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607                 dircount >>= 1;
1608         }
1609         /* Use mounted_on_fileid only if the server supports it */
1610         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611                 attrs[0] |= FATTR4_WORD0_FILEID;
1612         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613                 attrs[i] &= readdir->bitmask[i];
1614                 if (attrs[i] != 0)
1615                         attrlen = i+1;
1616         }
1617
1618         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619         encode_uint64(xdr, readdir->cookie);
1620         encode_nfs4_verifier(xdr, &readdir->verifier);
1621         p = reserve_space(xdr, 12 + (attrlen << 2));
1622         *p++ = cpu_to_be32(dircount);
1623         *p++ = cpu_to_be32(readdir->count);
1624         *p++ = cpu_to_be32(attrlen);
1625         for (i = 0; i < attrlen; i++)
1626                 *p++ = cpu_to_be32(attrs[i]);
1627         memcpy(verf, readdir->verifier.data, sizeof(verf));
1628
1629         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630                         __func__,
1631                         (unsigned long long)readdir->cookie,
1632                         verf[0], verf[1],
1633                         attrs[0] & readdir->bitmask[0],
1634                         attrs[1] & readdir->bitmask[1],
1635                         attrs[2] & readdir->bitmask[2]);
1636 }
1637
1638 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639 {
1640         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641 }
1642
1643 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644 {
1645         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646         encode_string(xdr, name->len, name->name);
1647 }
1648
1649 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650 {
1651         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652         encode_string(xdr, oldname->len, oldname->name);
1653         encode_string(xdr, newname->len, newname->name);
1654 }
1655
1656 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657                          struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660         encode_uint64(xdr, clid);
1661 }
1662
1663 static void
1664 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665 {
1666         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667 }
1668
1669 static void
1670 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671 {
1672         __be32 *p;
1673
1674         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675         encode_nfs4_stateid(xdr, &zero_stateid);
1676         p = reserve_space(xdr, 2*4);
1677         *p++ = cpu_to_be32(1);
1678         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679         p = reserve_space(xdr, 4);
1680         *p = cpu_to_be32(arg->acl_len);
1681         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682 }
1683
1684 static void
1685 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686 {
1687         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688 }
1689
1690 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693         encode_nfs4_stateid(xdr, &arg->stateid);
1694         encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695 }
1696
1697 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698 {
1699         __be32 *p;
1700
1701         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703
1704         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705                         setclientid->sc_clnt->cl_owner_id);
1706         p = reserve_space(xdr, 4);
1707         *p = cpu_to_be32(setclientid->sc_prog);
1708         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710         p = reserve_space(xdr, 4);
1711         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712 }
1713
1714 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715 {
1716         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717                         decode_setclientid_confirm_maxsz, hdr);
1718         encode_uint64(xdr, arg->clientid);
1719         encode_nfs4_verifier(xdr, &arg->confirm);
1720 }
1721
1722 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723                          struct compound_hdr *hdr)
1724 {
1725         __be32 *p;
1726
1727         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728         encode_nfs4_stateid(xdr, &args->stateid);
1729
1730         p = reserve_space(xdr, 16);
1731         p = xdr_encode_hyper(p, args->offset);
1732         *p++ = cpu_to_be32(args->stable);
1733         *p = cpu_to_be32(args->count);
1734
1735         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741         encode_nfs4_stateid(xdr, stateid);
1742 }
1743
1744 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745 {
1746         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747         encode_string(xdr, name->len, name->name);
1748 }
1749
1750 #if defined(CONFIG_NFS_V4_1)
1751 /* NFSv4.1 operations */
1752 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753                                    struct nfs41_bind_conn_to_session_args *args,
1754                                    struct compound_hdr *hdr)
1755 {
1756         __be32 *p;
1757
1758         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759                 decode_bind_conn_to_session_maxsz, hdr);
1760         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761         p = xdr_reserve_space(xdr, 8);
1762         *p++ = cpu_to_be32(args->dir);
1763         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764 }
1765
1766 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767 {
1768         unsigned int i;
1769         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771                 encode_uint32(xdr, op_map->u.words[i]);
1772 }
1773
1774 static void encode_exchange_id(struct xdr_stream *xdr,
1775                                struct nfs41_exchange_id_args *args,
1776                                struct compound_hdr *hdr)
1777 {
1778         __be32 *p;
1779         char impl_name[IMPL_NAME_LIMIT];
1780         int len = 0;
1781
1782         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783         encode_nfs4_verifier(xdr, args->verifier);
1784
1785         encode_string(xdr, strlen(args->client->cl_owner_id),
1786                         args->client->cl_owner_id);
1787
1788         encode_uint32(xdr, args->flags);
1789         encode_uint32(xdr, args->state_protect.how);
1790
1791         switch (args->state_protect.how) {
1792         case SP4_NONE:
1793                 break;
1794         case SP4_MACH_CRED:
1795                 encode_op_map(xdr, &args->state_protect.enforce);
1796                 encode_op_map(xdr, &args->state_protect.allow);
1797                 break;
1798         default:
1799                 WARN_ON_ONCE(1);
1800                 break;
1801         }
1802
1803         if (send_implementation_id &&
1804             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806                 <= sizeof(impl_name) + 1)
1807                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808                                utsname()->sysname, utsname()->release,
1809                                utsname()->version, utsname()->machine);
1810
1811         if (len > 0) {
1812                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1813
1814                 encode_string(xdr,
1815                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817                 encode_string(xdr, len, impl_name);
1818                 /* just send zeros for nii_date - the date is in nii_name */
1819                 p = reserve_space(xdr, 12);
1820                 p = xdr_encode_hyper(p, 0);
1821                 *p = cpu_to_be32(0);
1822         } else
1823                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1824 }
1825
1826 static void encode_create_session(struct xdr_stream *xdr,
1827                                   struct nfs41_create_session_args *args,
1828                                   struct compound_hdr *hdr)
1829 {
1830         __be32 *p;
1831         struct nfs_client *clp = args->client;
1832         struct rpc_clnt *clnt = clp->cl_rpcclient;
1833         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834         u32 max_resp_sz_cached;
1835
1836         /*
1837          * Assumes OPEN is the biggest non-idempotent compound.
1838          * 2 is the verifier.
1839          */
1840         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1841                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1842
1843         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845         p = xdr_encode_hyper(p, args->clientid);
1846         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1847         *p++ = cpu_to_be32(args->flags);                        /*flags */
1848
1849         /* Fore Channel */
1850         *p++ = cpu_to_be32(0);                          /* header padding size */
1851         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1854         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1855         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1856         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1857
1858         /* Back Channel */
1859         *p++ = cpu_to_be32(0);                          /* header padding size */
1860         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1863         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1864         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1865         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1866
1867         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1868         *p++ = cpu_to_be32(1);
1869         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1870
1871         /* authsys_parms rfc1831 */
1872         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1873         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874         *p++ = cpu_to_be32(0);                          /* UID */
1875         *p++ = cpu_to_be32(0);                          /* GID */
1876         *p = cpu_to_be32(0);                            /* No more gids */
1877 }
1878
1879 static void encode_destroy_session(struct xdr_stream *xdr,
1880                                    struct nfs4_session *session,
1881                                    struct compound_hdr *hdr)
1882 {
1883         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885 }
1886
1887 static void encode_destroy_clientid(struct xdr_stream *xdr,
1888                                    uint64_t clientid,
1889                                    struct compound_hdr *hdr)
1890 {
1891         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892         encode_uint64(xdr, clientid);
1893 }
1894
1895 static void encode_reclaim_complete(struct xdr_stream *xdr,
1896                                     struct nfs41_reclaim_complete_args *args,
1897                                     struct compound_hdr *hdr)
1898 {
1899         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900         encode_uint32(xdr, args->one_fs);
1901 }
1902 #endif /* CONFIG_NFS_V4_1 */
1903
1904 static void encode_sequence(struct xdr_stream *xdr,
1905                             const struct nfs4_sequence_args *args,
1906                             struct compound_hdr *hdr)
1907 {
1908 #if defined(CONFIG_NFS_V4_1)
1909         struct nfs4_session *session;
1910         struct nfs4_slot_table *tp;
1911         struct nfs4_slot *slot = args->sa_slot;
1912         __be32 *p;
1913
1914         tp = slot->table;
1915         session = tp->session;
1916         if (!session)
1917                 return;
1918
1919         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920
1921         /*
1922          * Sessionid + seqid + slotid + max slotid + cache_this
1923          */
1924         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925                 "max_slotid=%d cache_this=%d\n",
1926                 __func__,
1927                 ((u32 *)session->sess_id.data)[0],
1928                 ((u32 *)session->sess_id.data)[1],
1929                 ((u32 *)session->sess_id.data)[2],
1930                 ((u32 *)session->sess_id.data)[3],
1931                 slot->seq_nr, slot->slot_nr,
1932                 tp->highest_used_slotid, args->sa_cache_this);
1933         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935         *p++ = cpu_to_be32(slot->seq_nr);
1936         *p++ = cpu_to_be32(slot->slot_nr);
1937         *p++ = cpu_to_be32(tp->highest_used_slotid);
1938         *p = cpu_to_be32(args->sa_cache_this);
1939 #endif /* CONFIG_NFS_V4_1 */
1940 }
1941
1942 #ifdef CONFIG_NFS_V4_1
1943 static void
1944 encode_getdeviceinfo(struct xdr_stream *xdr,
1945                      const struct nfs4_getdeviceinfo_args *args,
1946                      struct compound_hdr *hdr)
1947 {
1948         __be32 *p;
1949
1950         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953                                     NFS4_DEVICEID4_SIZE);
1954         *p++ = cpu_to_be32(args->pdev->layout_type);
1955         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1956
1957         p = reserve_space(xdr, 4 + 4);
1958         *p++ = cpu_to_be32(1);                  /* bitmap length */
1959         *p++ = cpu_to_be32(args->notify_types);
1960 }
1961
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964                       const struct nfs4_layoutget_args *args,
1965                       struct compound_hdr *hdr)
1966 {
1967         __be32 *p;
1968
1969         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970         p = reserve_space(xdr, 36);
1971         *p++ = cpu_to_be32(0);     /* Signal layout available */
1972         *p++ = cpu_to_be32(args->type);
1973         *p++ = cpu_to_be32(args->range.iomode);
1974         p = xdr_encode_hyper(p, args->range.offset);
1975         p = xdr_encode_hyper(p, args->range.length);
1976         p = xdr_encode_hyper(p, args->minlength);
1977         encode_nfs4_stateid(xdr, &args->stateid);
1978         encode_uint32(xdr, args->maxcount);
1979
1980         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981                 __func__,
1982                 args->type,
1983                 args->range.iomode,
1984                 (unsigned long)args->range.offset,
1985                 (unsigned long)args->range.length,
1986                 args->maxcount);
1987 }
1988
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991                     struct inode *inode,
1992                     struct nfs4_layoutcommit_args *args,
1993                     struct compound_hdr *hdr)
1994 {
1995         __be32 *p;
1996
1997         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001         p = reserve_space(xdr, 20);
2002         /* Only whole file layouts */
2003         p = xdr_encode_hyper(p, 0); /* offset */
2004         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2005         *p = cpu_to_be32(0); /* reclaim */
2006         encode_nfs4_stateid(xdr, &args->stateid);
2007         if (args->lastbytewritten != U64_MAX) {
2008                 p = reserve_space(xdr, 20);
2009                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010                 p = xdr_encode_hyper(p, args->lastbytewritten);
2011         } else {
2012                 p = reserve_space(xdr, 12);
2013                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014         }
2015         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017
2018         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020                         NFS_I(inode)->layout, xdr, args);
2021         } else {
2022                 encode_uint32(xdr, args->layoutupdate_len);
2023                 if (args->layoutupdate_pages) {
2024                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025                                         args->layoutupdate_len);
2026                 }
2027         }
2028
2029         return 0;
2030 }
2031
2032 static void
2033 encode_layoutreturn(struct xdr_stream *xdr,
2034                     const struct nfs4_layoutreturn_args *args,
2035                     struct compound_hdr *hdr)
2036 {
2037         const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038         __be32 *p;
2039
2040         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041         p = reserve_space(xdr, 16);
2042         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2043         *p++ = cpu_to_be32(args->layout_type);
2044         *p++ = cpu_to_be32(args->range.iomode);
2045         *p = cpu_to_be32(RETURN_FILE);
2046         p = reserve_space(xdr, 16);
2047         p = xdr_encode_hyper(p, args->range.offset);
2048         p = xdr_encode_hyper(p, args->range.length);
2049         spin_lock(&args->inode->i_lock);
2050         encode_nfs4_stateid(xdr, &args->stateid);
2051         spin_unlock(&args->inode->i_lock);
2052         if (args->ld_private->ops && args->ld_private->ops->encode)
2053                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054         else if (lr_ops->encode_layoutreturn)
2055                 lr_ops->encode_layoutreturn(xdr, args);
2056         else
2057                 encode_uint32(xdr, 0);
2058 }
2059
2060 static int
2061 encode_secinfo_no_name(struct xdr_stream *xdr,
2062                        const struct nfs41_secinfo_no_name_args *args,
2063                        struct compound_hdr *hdr)
2064 {
2065         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066         encode_uint32(xdr, args->style);
2067         return 0;
2068 }
2069
2070 static void encode_test_stateid(struct xdr_stream *xdr,
2071                                 struct nfs41_test_stateid_args *args,
2072                                 struct compound_hdr *hdr)
2073 {
2074         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075         encode_uint32(xdr, 1);
2076         encode_nfs4_stateid(xdr, args->stateid);
2077 }
2078
2079 static void encode_free_stateid(struct xdr_stream *xdr,
2080                                 struct nfs41_free_stateid_args *args,
2081                                 struct compound_hdr *hdr)
2082 {
2083         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084         encode_nfs4_stateid(xdr, &args->stateid);
2085 }
2086 #else
2087 static inline void
2088 encode_layoutreturn(struct xdr_stream *xdr,
2089                     const struct nfs4_layoutreturn_args *args,
2090                     struct compound_hdr *hdr)
2091 {
2092 }
2093 #endif /* CONFIG_NFS_V4_1 */
2094
2095 /*
2096  * END OF "GENERIC" ENCODE ROUTINES.
2097  */
2098
2099 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100 {
2101 #if defined(CONFIG_NFS_V4_1)
2102         struct nfs4_session *session = args->sa_slot->table->session;
2103         if (session)
2104                 return session->clp->cl_mvops->minor_version;
2105 #endif /* CONFIG_NFS_V4_1 */
2106         return 0;
2107 }
2108
2109 /*
2110  * Encode an ACCESS request
2111  */
2112 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                 const struct nfs4_accessargs *args)
2114 {
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         encode_compound_hdr(xdr, req, &hdr);
2120         encode_sequence(xdr, &args->seq_args, &hdr);
2121         encode_putfh(xdr, args->fh, &hdr);
2122         encode_access(xdr, args->access, &hdr);
2123         encode_getfattr(xdr, args->bitmask, &hdr);
2124         encode_nops(&hdr);
2125 }
2126
2127 /*
2128  * Encode LOOKUP request
2129  */
2130 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131                                 const struct nfs4_lookup_arg *args)
2132 {
2133         struct compound_hdr hdr = {
2134                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135         };
2136
2137         encode_compound_hdr(xdr, req, &hdr);
2138         encode_sequence(xdr, &args->seq_args, &hdr);
2139         encode_putfh(xdr, args->dir_fh, &hdr);
2140         encode_lookup(xdr, args->name, &hdr);
2141         encode_getfh(xdr, &hdr);
2142         encode_getfattr(xdr, args->bitmask, &hdr);
2143         encode_nops(&hdr);
2144 }
2145
2146 /*
2147  * Encode LOOKUP_ROOT request
2148  */
2149 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150                                      struct xdr_stream *xdr,
2151                                      const struct nfs4_lookup_root_arg *args)
2152 {
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156
2157         encode_compound_hdr(xdr, req, &hdr);
2158         encode_sequence(xdr, &args->seq_args, &hdr);
2159         encode_putrootfh(xdr, &hdr);
2160         encode_getfh(xdr, &hdr);
2161         encode_getfattr(xdr, args->bitmask, &hdr);
2162         encode_nops(&hdr);
2163 }
2164
2165 /*
2166  * Encode REMOVE request
2167  */
2168 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                 const struct nfs_removeargs *args)
2170 {
2171         struct compound_hdr hdr = {
2172                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173         };
2174
2175         encode_compound_hdr(xdr, req, &hdr);
2176         encode_sequence(xdr, &args->seq_args, &hdr);
2177         encode_putfh(xdr, args->fh, &hdr);
2178         encode_remove(xdr, &args->name, &hdr);
2179         encode_nops(&hdr);
2180 }
2181
2182 /*
2183  * Encode RENAME request
2184  */
2185 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                                 const struct nfs_renameargs *args)
2187 {
2188         struct compound_hdr hdr = {
2189                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190         };
2191
2192         encode_compound_hdr(xdr, req, &hdr);
2193         encode_sequence(xdr, &args->seq_args, &hdr);
2194         encode_putfh(xdr, args->old_dir, &hdr);
2195         encode_savefh(xdr, &hdr);
2196         encode_putfh(xdr, args->new_dir, &hdr);
2197         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198         encode_nops(&hdr);
2199 }
2200
2201 /*
2202  * Encode LINK request
2203  */
2204 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205                              const struct nfs4_link_arg *args)
2206 {
2207         struct compound_hdr hdr = {
2208                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209         };
2210
2211         encode_compound_hdr(xdr, req, &hdr);
2212         encode_sequence(xdr, &args->seq_args, &hdr);
2213         encode_putfh(xdr, args->fh, &hdr);
2214         encode_savefh(xdr, &hdr);
2215         encode_putfh(xdr, args->dir_fh, &hdr);
2216         encode_link(xdr, args->name, &hdr);
2217         encode_restorefh(xdr, &hdr);
2218         encode_getfattr(xdr, args->bitmask, &hdr);
2219         encode_nops(&hdr);
2220 }
2221
2222 /*
2223  * Encode CREATE request
2224  */
2225 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                 const struct nfs4_create_arg *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_sequence(xdr, &args->seq_args, &hdr);
2234         encode_putfh(xdr, args->dir_fh, &hdr);
2235         encode_create(xdr, args, &hdr);
2236         encode_getfh(xdr, &hdr);
2237         encode_getfattr(xdr, args->bitmask, &hdr);
2238         encode_nops(&hdr);
2239 }
2240
2241 /*
2242  * Encode SYMLINK request
2243  */
2244 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                                  const struct nfs4_create_arg *args)
2246 {
2247         nfs4_xdr_enc_create(req, xdr, args);
2248 }
2249
2250 /*
2251  * Encode GETATTR request
2252  */
2253 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254                                  const struct nfs4_getattr_arg *args)
2255 {
2256         struct compound_hdr hdr = {
2257                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258         };
2259
2260         encode_compound_hdr(xdr, req, &hdr);
2261         encode_sequence(xdr, &args->seq_args, &hdr);
2262         encode_putfh(xdr, args->fh, &hdr);
2263         encode_getfattr(xdr, args->bitmask, &hdr);
2264         encode_nops(&hdr);
2265 }
2266
2267 /*
2268  * Encode a CLOSE request
2269  */
2270 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271                                struct nfs_closeargs *args)
2272 {
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         if (args->lr_args)
2281                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2282         if (args->bitmask != NULL)
2283                 encode_getfattr(xdr, args->bitmask, &hdr);
2284         encode_close(xdr, args, &hdr);
2285         encode_nops(&hdr);
2286 }
2287
2288 /*
2289  * Encode an OPEN request
2290  */
2291 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292                               struct nfs_openargs *args)
2293 {
2294         struct compound_hdr hdr = {
2295                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296         };
2297
2298         encode_compound_hdr(xdr, req, &hdr);
2299         encode_sequence(xdr, &args->seq_args, &hdr);
2300         encode_putfh(xdr, args->fh, &hdr);
2301         encode_open(xdr, args, &hdr);
2302         encode_getfh(xdr, &hdr);
2303         if (args->access)
2304                 encode_access(xdr, args->access, &hdr);
2305         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306         encode_nops(&hdr);
2307 }
2308
2309 /*
2310  * Encode an OPEN_CONFIRM request
2311  */
2312 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313                                       struct xdr_stream *xdr,
2314                                       struct nfs_open_confirmargs *args)
2315 {
2316         struct compound_hdr hdr = {
2317                 .nops   = 0,
2318         };
2319
2320         encode_compound_hdr(xdr, req, &hdr);
2321         encode_putfh(xdr, args->fh, &hdr);
2322         encode_open_confirm(xdr, args, &hdr);
2323         encode_nops(&hdr);
2324 }
2325
2326 /*
2327  * Encode an OPEN request with no attributes.
2328  */
2329 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330                                      struct xdr_stream *xdr,
2331                                      struct nfs_openargs *args)
2332 {
2333         struct compound_hdr hdr = {
2334                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335         };
2336
2337         encode_compound_hdr(xdr, req, &hdr);
2338         encode_sequence(xdr, &args->seq_args, &hdr);
2339         encode_putfh(xdr, args->fh, &hdr);
2340         encode_open(xdr, args, &hdr);
2341         if (args->access)
2342                 encode_access(xdr, args->access, &hdr);
2343         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344         encode_nops(&hdr);
2345 }
2346
2347 /*
2348  * Encode an OPEN_DOWNGRADE request
2349  */
2350 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351                                         struct xdr_stream *xdr,
2352                                         struct nfs_closeargs *args)
2353 {
2354         struct compound_hdr hdr = {
2355                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356         };
2357
2358         encode_compound_hdr(xdr, req, &hdr);
2359         encode_sequence(xdr, &args->seq_args, &hdr);
2360         encode_putfh(xdr, args->fh, &hdr);
2361         if (args->lr_args)
2362                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2363         encode_open_downgrade(xdr, args, &hdr);
2364         encode_nops(&hdr);
2365 }
2366
2367 /*
2368  * Encode a LOCK request
2369  */
2370 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371                               struct nfs_lock_args *args)
2372 {
2373         struct compound_hdr hdr = {
2374                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375         };
2376
2377         encode_compound_hdr(xdr, req, &hdr);
2378         encode_sequence(xdr, &args->seq_args, &hdr);
2379         encode_putfh(xdr, args->fh, &hdr);
2380         encode_lock(xdr, args, &hdr);
2381         encode_nops(&hdr);
2382 }
2383
2384 /*
2385  * Encode a LOCKT request
2386  */
2387 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388                                struct nfs_lockt_args *args)
2389 {
2390         struct compound_hdr hdr = {
2391                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392         };
2393
2394         encode_compound_hdr(xdr, req, &hdr);
2395         encode_sequence(xdr, &args->seq_args, &hdr);
2396         encode_putfh(xdr, args->fh, &hdr);
2397         encode_lockt(xdr, args, &hdr);
2398         encode_nops(&hdr);
2399 }
2400
2401 /*
2402  * Encode a LOCKU request
2403  */
2404 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                                struct nfs_locku_args *args)
2406 {
2407         struct compound_hdr hdr = {
2408                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409         };
2410
2411         encode_compound_hdr(xdr, req, &hdr);
2412         encode_sequence(xdr, &args->seq_args, &hdr);
2413         encode_putfh(xdr, args->fh, &hdr);
2414         encode_locku(xdr, args, &hdr);
2415         encode_nops(&hdr);
2416 }
2417
2418 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419                                            struct xdr_stream *xdr,
2420                                         struct nfs_release_lockowner_args *args)
2421 {
2422         struct compound_hdr hdr = {
2423                 .minorversion = 0,
2424         };
2425
2426         encode_compound_hdr(xdr, req, &hdr);
2427         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428         encode_nops(&hdr);
2429 }
2430
2431 /*
2432  * Encode a READLINK request
2433  */
2434 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                                   const struct nfs4_readlink *args)
2436 {
2437         struct compound_hdr hdr = {
2438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439         };
2440
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         encode_readlink(xdr, args, req, &hdr);
2445
2446         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447                         args->pgbase, args->pglen);
2448         encode_nops(&hdr);
2449 }
2450
2451 /*
2452  * Encode a READDIR request
2453  */
2454 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                  const struct nfs4_readdir_arg *args)
2456 {
2457         struct compound_hdr hdr = {
2458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459         };
2460
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_sequence(xdr, &args->seq_args, &hdr);
2463         encode_putfh(xdr, args->fh, &hdr);
2464         encode_readdir(xdr, args, req, &hdr);
2465
2466         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467                          args->pgbase, args->count);
2468         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469                         __func__, hdr.replen << 2, args->pages,
2470                         args->pgbase, args->count);
2471         encode_nops(&hdr);
2472 }
2473
2474 /*
2475  * Encode a READ request
2476  */
2477 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478                               struct nfs_pgio_args *args)
2479 {
2480         struct compound_hdr hdr = {
2481                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482         };
2483
2484         encode_compound_hdr(xdr, req, &hdr);
2485         encode_sequence(xdr, &args->seq_args, &hdr);
2486         encode_putfh(xdr, args->fh, &hdr);
2487         encode_read(xdr, args, &hdr);
2488
2489         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490                          args->pages, args->pgbase, args->count);
2491         req->rq_rcv_buf.flags |= XDRBUF_READ;
2492         encode_nops(&hdr);
2493 }
2494
2495 /*
2496  * Encode an SETATTR request
2497  */
2498 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                  struct nfs_setattrargs *args)
2500 {
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_setattr(xdr, args, args->server, &hdr);
2509         encode_getfattr(xdr, args->bitmask, &hdr);
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  * Encode a GETACL request
2515  */
2516 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                 struct nfs_getaclargs *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521         };
2522         uint32_t replen;
2523
2524         encode_compound_hdr(xdr, req, &hdr);
2525         encode_sequence(xdr, &args->seq_args, &hdr);
2526         encode_putfh(xdr, args->fh, &hdr);
2527         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2528         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529
2530         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531                 args->acl_pages, 0, args->acl_len);
2532
2533         encode_nops(&hdr);
2534 }
2535
2536 /*
2537  * Encode a WRITE request
2538  */
2539 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                struct nfs_pgio_args *args)
2541 {
2542         struct compound_hdr hdr = {
2543                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544         };
2545
2546         encode_compound_hdr(xdr, req, &hdr);
2547         encode_sequence(xdr, &args->seq_args, &hdr);
2548         encode_putfh(xdr, args->fh, &hdr);
2549         encode_write(xdr, args, &hdr);
2550         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551         if (args->bitmask)
2552                 encode_getfattr(xdr, args->bitmask, &hdr);
2553         encode_nops(&hdr);
2554 }
2555
2556 /*
2557  *  a COMMIT request
2558  */
2559 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560                                 struct nfs_commitargs *args)
2561 {
2562         struct compound_hdr hdr = {
2563                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564         };
2565
2566         encode_compound_hdr(xdr, req, &hdr);
2567         encode_sequence(xdr, &args->seq_args, &hdr);
2568         encode_putfh(xdr, args->fh, &hdr);
2569         encode_commit(xdr, args, &hdr);
2570         encode_nops(&hdr);
2571 }
2572
2573 /*
2574  * FSINFO request
2575  */
2576 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577                                 struct nfs4_fsinfo_arg *args)
2578 {
2579         struct compound_hdr hdr = {
2580                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581         };
2582
2583         encode_compound_hdr(xdr, req, &hdr);
2584         encode_sequence(xdr, &args->seq_args, &hdr);
2585         encode_putfh(xdr, args->fh, &hdr);
2586         encode_fsinfo(xdr, args->bitmask, &hdr);
2587         encode_nops(&hdr);
2588 }
2589
2590 /*
2591  * a PATHCONF request
2592  */
2593 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594                                   const struct nfs4_pathconf_arg *args)
2595 {
2596         struct compound_hdr hdr = {
2597                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598         };
2599
2600         encode_compound_hdr(xdr, req, &hdr);
2601         encode_sequence(xdr, &args->seq_args, &hdr);
2602         encode_putfh(xdr, args->fh, &hdr);
2603         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604                            &hdr);
2605         encode_nops(&hdr);
2606 }
2607
2608 /*
2609  * a STATFS request
2610  */
2611 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612                                 const struct nfs4_statfs_arg *args)
2613 {
2614         struct compound_hdr hdr = {
2615                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616         };
2617
2618         encode_compound_hdr(xdr, req, &hdr);
2619         encode_sequence(xdr, &args->seq_args, &hdr);
2620         encode_putfh(xdr, args->fh, &hdr);
2621         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623         encode_nops(&hdr);
2624 }
2625
2626 /*
2627  * GETATTR_BITMAP request
2628  */
2629 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630                                      struct xdr_stream *xdr,
2631                                      struct nfs4_server_caps_arg *args)
2632 {
2633         const u32 *bitmask = args->bitmask;
2634         struct compound_hdr hdr = {
2635                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636         };
2637
2638         encode_compound_hdr(xdr, req, &hdr);
2639         encode_sequence(xdr, &args->seq_args, &hdr);
2640         encode_putfh(xdr, args->fhandle, &hdr);
2641         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642         encode_nops(&hdr);
2643 }
2644
2645 /*
2646  * a RENEW request
2647  */
2648 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649                                struct nfs_client *clp)
2650 {
2651         struct compound_hdr hdr = {
2652                 .nops   = 0,
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_renew(xdr, clp->cl_clientid, &hdr);
2657         encode_nops(&hdr);
2658 }
2659
2660 /*
2661  * a SETCLIENTID request
2662  */
2663 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      struct nfs4_setclientid *sc)
2666 {
2667         struct compound_hdr hdr = {
2668                 .nops   = 0,
2669         };
2670
2671         encode_compound_hdr(xdr, req, &hdr);
2672         encode_setclientid(xdr, sc, &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 /*
2677  * a SETCLIENTID_CONFIRM request
2678  */
2679 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680                                              struct xdr_stream *xdr,
2681                                              struct nfs4_setclientid_res *arg)
2682 {
2683         struct compound_hdr hdr = {
2684                 .nops   = 0,
2685         };
2686
2687         encode_compound_hdr(xdr, req, &hdr);
2688         encode_setclientid_confirm(xdr, arg, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * DELEGRETURN request
2694  */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      const struct nfs4_delegreturnargs *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         if (args->lr_args)
2707                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2708         if (args->bitmask)
2709                 encode_getfattr(xdr, args->bitmask, &hdr);
2710         encode_delegreturn(xdr, args->stateid, &hdr);
2711         encode_nops(&hdr);
2712 }
2713
2714 /*
2715  * Encode FS_LOCATIONS request
2716  */
2717 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2718                                       struct xdr_stream *xdr,
2719                                       struct nfs4_fs_locations_arg *args)
2720 {
2721         struct compound_hdr hdr = {
2722                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2723         };
2724         uint32_t replen;
2725
2726         encode_compound_hdr(xdr, req, &hdr);
2727         encode_sequence(xdr, &args->seq_args, &hdr);
2728         if (args->migration) {
2729                 encode_putfh(xdr, args->fh, &hdr);
2730                 replen = hdr.replen;
2731                 encode_fs_locations(xdr, args->bitmask, &hdr);
2732                 if (args->renew)
2733                         encode_renew(xdr, args->clientid, &hdr);
2734         } else {
2735                 encode_putfh(xdr, args->dir_fh, &hdr);
2736                 encode_lookup(xdr, args->name, &hdr);
2737                 replen = hdr.replen;
2738                 encode_fs_locations(xdr, args->bitmask, &hdr);
2739         }
2740
2741         /* Set up reply kvec to capture returned fs_locations array. */
2742         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2743                         0, PAGE_SIZE);
2744         encode_nops(&hdr);
2745 }
2746
2747 /*
2748  * Encode SECINFO request
2749  */
2750 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2751                                 struct xdr_stream *xdr,
2752                                 struct nfs4_secinfo_arg *args)
2753 {
2754         struct compound_hdr hdr = {
2755                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2756         };
2757
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_sequence(xdr, &args->seq_args, &hdr);
2760         encode_putfh(xdr, args->dir_fh, &hdr);
2761         encode_secinfo(xdr, args->name, &hdr);
2762         encode_nops(&hdr);
2763 }
2764
2765 /*
2766  * Encode FSID_PRESENT request
2767  */
2768 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2769                                       struct xdr_stream *xdr,
2770                                       struct nfs4_fsid_present_arg *args)
2771 {
2772         struct compound_hdr hdr = {
2773                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774         };
2775
2776         encode_compound_hdr(xdr, req, &hdr);
2777         encode_sequence(xdr, &args->seq_args, &hdr);
2778         encode_putfh(xdr, args->fh, &hdr);
2779         encode_getfh(xdr, &hdr);
2780         if (args->renew)
2781                 encode_renew(xdr, args->clientid, &hdr);
2782         encode_nops(&hdr);
2783 }
2784
2785 #if defined(CONFIG_NFS_V4_1)
2786 /*
2787  * BIND_CONN_TO_SESSION request
2788  */
2789 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2790                                 struct xdr_stream *xdr,
2791                                 struct nfs41_bind_conn_to_session_args *args)
2792 {
2793         struct compound_hdr hdr = {
2794                 .minorversion = args->client->cl_mvops->minor_version,
2795         };
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_bind_conn_to_session(xdr, args, &hdr);
2799         encode_nops(&hdr);
2800 }
2801
2802 /*
2803  * EXCHANGE_ID request
2804  */
2805 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2806                                      struct xdr_stream *xdr,
2807                                      struct nfs41_exchange_id_args *args)
2808 {
2809         struct compound_hdr hdr = {
2810                 .minorversion = args->client->cl_mvops->minor_version,
2811         };
2812
2813         encode_compound_hdr(xdr, req, &hdr);
2814         encode_exchange_id(xdr, args, &hdr);
2815         encode_nops(&hdr);
2816 }
2817
2818 /*
2819  * a CREATE_SESSION request
2820  */
2821 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2822                                         struct xdr_stream *xdr,
2823                                         struct nfs41_create_session_args *args)
2824 {
2825         struct compound_hdr hdr = {
2826                 .minorversion = args->client->cl_mvops->minor_version,
2827         };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_create_session(xdr, args, &hdr);
2831         encode_nops(&hdr);
2832 }
2833
2834 /*
2835  * a DESTROY_SESSION request
2836  */
2837 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2838                                          struct xdr_stream *xdr,
2839                                          struct nfs4_session *session)
2840 {
2841         struct compound_hdr hdr = {
2842                 .minorversion = session->clp->cl_mvops->minor_version,
2843         };
2844
2845         encode_compound_hdr(xdr, req, &hdr);
2846         encode_destroy_session(xdr, session, &hdr);
2847         encode_nops(&hdr);
2848 }
2849
2850 /*
2851  * a DESTROY_CLIENTID request
2852  */
2853 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2854                                          struct xdr_stream *xdr,
2855                                          struct nfs_client *clp)
2856 {
2857         struct compound_hdr hdr = {
2858                 .minorversion = clp->cl_mvops->minor_version,
2859         };
2860
2861         encode_compound_hdr(xdr, req, &hdr);
2862         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2863         encode_nops(&hdr);
2864 }
2865
2866 /*
2867  * a SEQUENCE request
2868  */
2869 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2870                                   struct nfs4_sequence_args *args)
2871 {
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(args),
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, args, &hdr);
2878         encode_nops(&hdr);
2879 }
2880
2881 /*
2882  * a GET_LEASE_TIME request
2883  */
2884 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2885                                         struct xdr_stream *xdr,
2886                                         struct nfs4_get_lease_time_args *args)
2887 {
2888         struct compound_hdr hdr = {
2889                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2890         };
2891         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->la_seq_args, &hdr);
2895         encode_putrootfh(xdr, &hdr);
2896         encode_fsinfo(xdr, lease_bitmap, &hdr);
2897         encode_nops(&hdr);
2898 }
2899
2900 /*
2901  * a RECLAIM_COMPLETE request
2902  */
2903 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2904                                           struct xdr_stream *xdr,
2905                                 struct nfs41_reclaim_complete_args *args)
2906 {
2907         struct compound_hdr hdr = {
2908                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2909         };
2910
2911         encode_compound_hdr(xdr, req, &hdr);
2912         encode_sequence(xdr, &args->seq_args, &hdr);
2913         encode_reclaim_complete(xdr, args, &hdr);
2914         encode_nops(&hdr);
2915 }
2916
2917 /*
2918  * Encode GETDEVICEINFO request
2919  */
2920 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2921                                        struct xdr_stream *xdr,
2922                                        struct nfs4_getdeviceinfo_args *args)
2923 {
2924         struct compound_hdr hdr = {
2925                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926         };
2927
2928         encode_compound_hdr(xdr, req, &hdr);
2929         encode_sequence(xdr, &args->seq_args, &hdr);
2930         encode_getdeviceinfo(xdr, args, &hdr);
2931
2932         /* set up reply kvec. Subtract notification bitmap max size (2)
2933          * so that notification bitmap is put in xdr_buf tail */
2934         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2935                          args->pdev->pages, args->pdev->pgbase,
2936                          args->pdev->pglen);
2937
2938         encode_nops(&hdr);
2939 }
2940
2941 /*
2942  *  Encode LAYOUTGET request
2943  */
2944 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2945                                    struct xdr_stream *xdr,
2946                                    struct nfs4_layoutget_args *args)
2947 {
2948         struct compound_hdr hdr = {
2949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950         };
2951
2952         encode_compound_hdr(xdr, req, &hdr);
2953         encode_sequence(xdr, &args->seq_args, &hdr);
2954         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955         encode_layoutget(xdr, args, &hdr);
2956
2957         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2958             args->layout.pages, 0, args->layout.pglen);
2959
2960         encode_nops(&hdr);
2961 }
2962
2963 /*
2964  *  Encode LAYOUTCOMMIT request
2965  */
2966 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2967                                       struct xdr_stream *xdr,
2968                                       struct nfs4_layoutcommit_args *args)
2969 {
2970         struct nfs4_layoutcommit_data *data =
2971                 container_of(args, struct nfs4_layoutcommit_data, args);
2972         struct compound_hdr hdr = {
2973                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2974         };
2975
2976         encode_compound_hdr(xdr, req, &hdr);
2977         encode_sequence(xdr, &args->seq_args, &hdr);
2978         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2979         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2980         encode_getfattr(xdr, args->bitmask, &hdr);
2981         encode_nops(&hdr);
2982 }
2983
2984 /*
2985  * Encode LAYOUTRETURN request
2986  */
2987 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2988                                       struct xdr_stream *xdr,
2989                                       struct nfs4_layoutreturn_args *args)
2990 {
2991         struct compound_hdr hdr = {
2992                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993         };
2994
2995         encode_compound_hdr(xdr, req, &hdr);
2996         encode_sequence(xdr, &args->seq_args, &hdr);
2997         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2998         encode_layoutreturn(xdr, args, &hdr);
2999         encode_nops(&hdr);
3000 }
3001
3002 /*
3003  * Encode SECINFO_NO_NAME request
3004  */
3005 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3006                                         struct xdr_stream *xdr,
3007                                         struct nfs41_secinfo_no_name_args *args)
3008 {
3009         struct compound_hdr hdr = {
3010                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011         };
3012
3013         encode_compound_hdr(xdr, req, &hdr);
3014         encode_sequence(xdr, &args->seq_args, &hdr);
3015         encode_putrootfh(xdr, &hdr);
3016         encode_secinfo_no_name(xdr, args, &hdr);
3017         encode_nops(&hdr);
3018         return 0;
3019 }
3020
3021 /*
3022  *  Encode TEST_STATEID request
3023  */
3024 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3025                                       struct xdr_stream *xdr,
3026                                       struct nfs41_test_stateid_args *args)
3027 {
3028         struct compound_hdr hdr = {
3029                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3030         };
3031
3032         encode_compound_hdr(xdr, req, &hdr);
3033         encode_sequence(xdr, &args->seq_args, &hdr);
3034         encode_test_stateid(xdr, args, &hdr);
3035         encode_nops(&hdr);
3036 }
3037
3038 /*
3039  *  Encode FREE_STATEID request
3040  */
3041 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3042                                      struct xdr_stream *xdr,
3043                                      struct nfs41_free_stateid_args *args)
3044 {
3045         struct compound_hdr hdr = {
3046                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3047         };
3048
3049         encode_compound_hdr(xdr, req, &hdr);
3050         encode_sequence(xdr, &args->seq_args, &hdr);
3051         encode_free_stateid(xdr, args, &hdr);
3052         encode_nops(&hdr);
3053 }
3054 #endif /* CONFIG_NFS_V4_1 */
3055
3056 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3057 {
3058         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3059                 "Remaining buffer length is %tu words.\n",
3060                 func, xdr->end - xdr->p);
3061 }
3062
3063 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3064 {
3065         __be32 *p;
3066
3067         p = xdr_inline_decode(xdr, 4);
3068         if (unlikely(!p))
3069                 goto out_overflow;
3070         *len = be32_to_cpup(p);
3071         p = xdr_inline_decode(xdr, *len);
3072         if (unlikely(!p))
3073                 goto out_overflow;
3074         *string = (char *)p;
3075         return 0;
3076 out_overflow:
3077         print_overflow_msg(__func__, xdr);
3078         return -EIO;
3079 }
3080
3081 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3082 {
3083         __be32 *p;
3084
3085         p = xdr_inline_decode(xdr, 8);
3086         if (unlikely(!p))
3087                 goto out_overflow;
3088         hdr->status = be32_to_cpup(p++);
3089         hdr->taglen = be32_to_cpup(p);
3090
3091         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3092         if (unlikely(!p))
3093                 goto out_overflow;
3094         hdr->tag = (char *)p;
3095         p += XDR_QUADLEN(hdr->taglen);
3096         hdr->nops = be32_to_cpup(p);
3097         if (unlikely(hdr->nops < 1))
3098                 return nfs4_stat_to_errno(hdr->status);
3099         return 0;
3100 out_overflow:
3101         print_overflow_msg(__func__, xdr);
3102         return -EIO;
3103 }
3104
3105 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3106                 int *nfs_retval)
3107 {
3108         __be32 *p;
3109         uint32_t opnum;
3110         int32_t nfserr;
3111
3112         p = xdr_inline_decode(xdr, 8);
3113         if (unlikely(!p))
3114                 goto out_overflow;
3115         opnum = be32_to_cpup(p++);
3116         if (unlikely(opnum != expected))
3117                 goto out_bad_operation;
3118         nfserr = be32_to_cpup(p);
3119         if (nfserr == NFS_OK)
3120                 *nfs_retval = 0;
3121         else
3122                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3123         return true;
3124 out_bad_operation:
3125         dprintk("nfs: Server returned operation"
3126                 " %d but we issued a request for %d\n",
3127                         opnum, expected);
3128         *nfs_retval = -EREMOTEIO;
3129         return false;
3130 out_overflow:
3131         print_overflow_msg(__func__, xdr);
3132         *nfs_retval = -EIO;
3133         return false;
3134 }
3135
3136 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3137 {
3138         int retval;
3139
3140         __decode_op_hdr(xdr, expected, &retval);
3141         return retval;
3142 }
3143
3144 /* Dummy routine */
3145 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3146 {
3147         __be32 *p;
3148         unsigned int strlen;
3149         char *str;
3150
3151         p = xdr_inline_decode(xdr, 12);
3152         if (likely(p))
3153                 return decode_opaque_inline(xdr, &strlen, &str);
3154         print_overflow_msg(__func__, xdr);
3155         return -EIO;
3156 }
3157
3158 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3159 {
3160         uint32_t bmlen;
3161         __be32 *p;
3162
3163         p = xdr_inline_decode(xdr, 4);
3164         if (unlikely(!p))
3165                 goto out_overflow;
3166         bmlen = be32_to_cpup(p);
3167
3168         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3169         p = xdr_inline_decode(xdr, (bmlen << 2));
3170         if (unlikely(!p))
3171                 goto out_overflow;
3172         if (bmlen > 0) {
3173                 bitmap[0] = be32_to_cpup(p++);
3174                 if (bmlen > 1) {
3175                         bitmap[1] = be32_to_cpup(p++);
3176                         if (bmlen > 2)
3177                                 bitmap[2] = be32_to_cpup(p);
3178                 }
3179         }
3180         return 0;
3181 out_overflow:
3182         print_overflow_msg(__func__, xdr);
3183         return -EIO;
3184 }
3185
3186 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3187 {
3188         __be32 *p;
3189
3190         p = xdr_inline_decode(xdr, 4);
3191         if (unlikely(!p))
3192                 goto out_overflow;
3193         *attrlen = be32_to_cpup(p);
3194         *savep = xdr_stream_pos(xdr);
3195         return 0;
3196 out_overflow:
3197         print_overflow_msg(__func__, xdr);
3198         return -EIO;
3199 }
3200
3201 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3202 {
3203         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3204                 int ret;
3205                 ret = decode_attr_bitmap(xdr, bitmask);
3206                 if (unlikely(ret < 0))
3207                         return ret;
3208                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3209         } else
3210                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3211         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3212                 bitmask[0], bitmask[1], bitmask[2]);
3213         return 0;
3214 }
3215
3216 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3217 {
3218         __be32 *p;
3219         int ret = 0;
3220
3221         *type = 0;
3222         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3223                 return -EIO;
3224         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3225                 p = xdr_inline_decode(xdr, 4);
3226                 if (unlikely(!p))
3227                         goto out_overflow;
3228                 *type = be32_to_cpup(p);
3229                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3230                         dprintk("%s: bad type %d\n", __func__, *type);
3231                         return -EIO;
3232                 }
3233                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3234                 ret = NFS_ATTR_FATTR_TYPE;
3235         }
3236         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3237         return ret;
3238 out_overflow:
3239         print_overflow_msg(__func__, xdr);
3240         return -EIO;
3241 }
3242
3243 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3244                                       uint32_t *bitmap, uint32_t *type)
3245 {
3246         __be32 *p;
3247
3248         *type = 0;
3249         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3250                 return -EIO;
3251         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3252                 p = xdr_inline_decode(xdr, 4);
3253                 if (unlikely(!p))
3254                         goto out_overflow;
3255                 *type = be32_to_cpup(p);
3256                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3257         }
3258         dprintk("%s: expire type=0x%x\n", __func__, *type);
3259         return 0;
3260 out_overflow:
3261         print_overflow_msg(__func__, xdr);
3262         return -EIO;
3263 }
3264
3265 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3266 {
3267         __be32 *p;
3268         int ret = 0;
3269
3270         *change = 0;
3271         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3272                 return -EIO;
3273         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3274                 p = xdr_inline_decode(xdr, 8);
3275                 if (unlikely(!p))
3276                         goto out_overflow;
3277                 xdr_decode_hyper(p, change);
3278                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3279                 ret = NFS_ATTR_FATTR_CHANGE;
3280         }
3281         dprintk("%s: change attribute=%Lu\n", __func__,
3282                         (unsigned long long)*change);
3283         return ret;
3284 out_overflow:
3285         print_overflow_msg(__func__, xdr);
3286         return -EIO;
3287 }
3288
3289 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3290 {
3291         __be32 *p;
3292         int ret = 0;
3293
3294         *size = 0;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3298                 p = xdr_inline_decode(xdr, 8);
3299                 if (unlikely(!p))
3300                         goto out_overflow;
3301                 xdr_decode_hyper(p, size);
3302                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3303                 ret = NFS_ATTR_FATTR_SIZE;
3304         }
3305         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3306         return ret;
3307 out_overflow:
3308         print_overflow_msg(__func__, xdr);
3309         return -EIO;
3310 }
3311
3312 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3313 {
3314         __be32 *p;
3315
3316         *res = 0;
3317         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3318                 return -EIO;
3319         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3320                 p = xdr_inline_decode(xdr, 4);
3321                 if (unlikely(!p))
3322                         goto out_overflow;
3323                 *res = be32_to_cpup(p);
3324                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3325         }
3326         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3327         return 0;
3328 out_overflow:
3329         print_overflow_msg(__func__, xdr);
3330         return -EIO;
3331 }
3332
3333 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3334 {
3335         __be32 *p;
3336
3337         *res = 0;
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3341                 p = xdr_inline_decode(xdr, 4);
3342                 if (unlikely(!p))
3343                         goto out_overflow;
3344                 *res = be32_to_cpup(p);
3345                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3346         }
3347         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3348         return 0;
3349 out_overflow:
3350         print_overflow_msg(__func__, xdr);
3351         return -EIO;
3352 }
3353
3354 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3355 {
3356         __be32 *p;
3357         int ret = 0;
3358
3359         fsid->major = 0;
3360         fsid->minor = 0;
3361         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3362                 return -EIO;
3363         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3364                 p = xdr_inline_decode(xdr, 16);
3365                 if (unlikely(!p))
3366                         goto out_overflow;
3367                 p = xdr_decode_hyper(p, &fsid->major);
3368                 xdr_decode_hyper(p, &fsid->minor);
3369                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3370                 ret = NFS_ATTR_FATTR_FSID;
3371         }
3372         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3373                         (unsigned long long)fsid->major,
3374                         (unsigned long long)fsid->minor);
3375         return ret;
3376 out_overflow:
3377         print_overflow_msg(__func__, xdr);
3378         return -EIO;
3379 }
3380
3381 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3382 {
3383         __be32 *p;
3384
3385         *res = 60;
3386         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3387                 return -EIO;
3388         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3389                 p = xdr_inline_decode(xdr, 4);
3390                 if (unlikely(!p))
3391                         goto out_overflow;
3392                 *res = be32_to_cpup(p);
3393                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3394         }
3395         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3396         return 0;
3397 out_overflow:
3398         print_overflow_msg(__func__, xdr);
3399         return -EIO;
3400 }
3401
3402 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3403 {
3404         __be32 *p;
3405
3406         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3407                 return -EIO;
3408         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3409                 p = xdr_inline_decode(xdr, 4);
3410                 if (unlikely(!p))
3411                         goto out_overflow;
3412                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3413                 *res = -be32_to_cpup(p);
3414         }
3415         return 0;
3416 out_overflow:
3417         print_overflow_msg(__func__, xdr);
3418         return -EIO;
3419 }
3420
3421 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3422                                  uint32_t *bitmap, uint32_t *bitmask)
3423 {
3424         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3425                 int ret;
3426                 ret = decode_attr_bitmap(xdr, bitmask);
3427                 if (unlikely(ret < 0))
3428                         return ret;
3429                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3430         } else
3431                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3432         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3433                 bitmask[0], bitmask[1], bitmask[2]);
3434         return 0;
3435 }
3436
3437 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3438 {
3439         __be32 *p;
3440         int len;
3441
3442         if (fh != NULL)
3443                 memset(fh, 0, sizeof(*fh));
3444
3445         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3446                 return -EIO;
3447         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3448                 p = xdr_inline_decode(xdr, 4);
3449                 if (unlikely(!p))
3450                         goto out_overflow;
3451                 len = be32_to_cpup(p);
3452                 if (len > NFS4_FHSIZE)
3453                         return -EIO;
3454                 p = xdr_inline_decode(xdr, len);
3455                 if (unlikely(!p))
3456                         goto out_overflow;
3457                 if (fh != NULL) {
3458                         memcpy(fh->data, p, len);
3459                         fh->size = len;
3460                 }
3461                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3462         }
3463         return 0;
3464 out_overflow:
3465         print_overflow_msg(__func__, xdr);
3466         return -EIO;
3467 }
3468
3469 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3470 {
3471         __be32 *p;
3472
3473         *res = 0;
3474         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3475                 return -EIO;
3476         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3477                 p = xdr_inline_decode(xdr, 4);
3478                 if (unlikely(!p))
3479                         goto out_overflow;
3480                 *res = be32_to_cpup(p);
3481                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3482         }
3483         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3484         return 0;
3485 out_overflow:
3486         print_overflow_msg(__func__, xdr);
3487         return -EIO;
3488 }
3489
3490 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3491 {
3492         __be32 *p;
3493         int ret = 0;
3494
3495         *fileid = 0;
3496         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3497                 return -EIO;
3498         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3499                 p = xdr_inline_decode(xdr, 8);
3500                 if (unlikely(!p))
3501                         goto out_overflow;
3502                 xdr_decode_hyper(p, fileid);
3503                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3504                 ret = NFS_ATTR_FATTR_FILEID;
3505         }
3506         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3507         return ret;
3508 out_overflow:
3509         print_overflow_msg(__func__, xdr);
3510         return -EIO;
3511 }
3512
3513 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3514 {
3515         __be32 *p;
3516         int ret = 0;
3517
3518         *fileid = 0;
3519         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3520                 return -EIO;
3521         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3522                 p = xdr_inline_decode(xdr, 8);
3523                 if (unlikely(!p))
3524                         goto out_overflow;
3525                 xdr_decode_hyper(p, fileid);
3526                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3527                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3528         }
3529         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3530         return ret;
3531 out_overflow:
3532         print_overflow_msg(__func__, xdr);
3533         return -EIO;
3534 }
3535
3536 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3537 {
3538         __be32 *p;
3539         int status = 0;
3540
3541         *res = 0;
3542         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3543                 return -EIO;
3544         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3545                 p = xdr_inline_decode(xdr, 8);
3546                 if (unlikely(!p))
3547                         goto out_overflow;
3548                 xdr_decode_hyper(p, res);
3549                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3550         }
3551         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3552         return status;
3553 out_overflow:
3554         print_overflow_msg(__func__, xdr);
3555         return -EIO;
3556 }
3557
3558 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3559 {
3560         __be32 *p;
3561         int status = 0;
3562
3563         *res = 0;
3564         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3565                 return -EIO;
3566         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3567                 p = xdr_inline_decode(xdr, 8);
3568                 if (unlikely(!p))
3569                         goto out_overflow;
3570                 xdr_decode_hyper(p, res);
3571                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3572         }
3573         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3574         return status;
3575 out_overflow:
3576         print_overflow_msg(__func__, xdr);
3577         return -EIO;
3578 }
3579
3580 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3581 {
3582         __be32 *p;
3583         int status = 0;
3584
3585         *res = 0;
3586         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3587                 return -EIO;
3588         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3589                 p = xdr_inline_decode(xdr, 8);
3590                 if (unlikely(!p))
3591                         goto out_overflow;
3592                 xdr_decode_hyper(p, res);
3593                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3594         }
3595         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3596         return status;
3597 out_overflow:
3598         print_overflow_msg(__func__, xdr);
3599         return -EIO;
3600 }
3601
3602 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3603 {
3604         u32 n;
3605         __be32 *p;
3606         int status = 0;
3607
3608         p = xdr_inline_decode(xdr, 4);
3609         if (unlikely(!p))
3610                 goto out_overflow;
3611         n = be32_to_cpup(p);
3612         if (n == 0)
3613                 goto root_path;
3614         dprintk("pathname4: ");
3615         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3616                 dprintk("cannot parse %d components in path\n", n);
3617                 goto out_eio;
3618         }
3619         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3620                 struct nfs4_string *component = &path->components[path->ncomponents];
3621                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3622                 if (unlikely(status != 0))
3623                         goto out_eio;
3624                 ifdebug (XDR)
3625                         pr_cont("%s%.*s ",
3626                                 (path->ncomponents != n ? "/ " : ""),
3627                                 component->len, component->data);
3628         }
3629 out:
3630         return status;
3631 root_path:
3632 /* a root pathname is sent as a zero component4 */
3633         path->ncomponents = 1;
3634         path->components[0].len=0;
3635         path->components[0].data=NULL;
3636         dprintk("pathname4: /\n");
3637         goto out;
3638 out_eio:
3639         dprintk(" status %d", status);
3640         status = -EIO;
3641         goto out;
3642 out_overflow:
3643         print_overflow_msg(__func__, xdr);
3644         return -EIO;
3645 }
3646
3647 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3648 {
3649         int n;
3650         __be32 *p;
3651         int status = -EIO;
3652
3653         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3654                 goto out;
3655         status = 0;
3656         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3657                 goto out;
3658         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3659         status = -EIO;
3660         /* Ignore borken servers that return unrequested attrs */
3661         if (unlikely(res == NULL))
3662                 goto out;
3663         dprintk("%s: fsroot:\n", __func__);
3664         status = decode_pathname(xdr, &res->fs_path);
3665         if (unlikely(status != 0))
3666                 goto out;
3667         p = xdr_inline_decode(xdr, 4);
3668         if (unlikely(!p))
3669                 goto out_overflow;
3670         n = be32_to_cpup(p);
3671         if (n <= 0)
3672                 goto out_eio;
3673         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3674                 u32 m;
3675                 struct nfs4_fs_location *loc;
3676
3677                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3678                         break;
3679                 loc = &res->locations[res->nlocations];
3680                 p = xdr_inline_decode(xdr, 4);
3681                 if (unlikely(!p))
3682                         goto out_overflow;
3683                 m = be32_to_cpup(p);
3684
3685                 dprintk("%s: servers:\n", __func__);
3686                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3687                         struct nfs4_string *server;
3688
3689                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3690                                 unsigned int i;
3691                                 dprintk("%s: using first %u of %u servers "
3692                                         "returned for location %u\n",
3693                                                 __func__,
3694                                                 NFS4_FS_LOCATION_MAXSERVERS,
3695                                                 m, res->nlocations);
3696                                 for (i = loc->nservers; i < m; i++) {
3697                                         unsigned int len;
3698                                         char *data;
3699                                         status = decode_opaque_inline(xdr, &len, &data);
3700                                         if (unlikely(status != 0))
3701                                                 goto out_eio;
3702                                 }
3703                                 break;
3704                         }
3705                         server = &loc->servers[loc->nservers];
3706                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3707                         if (unlikely(status != 0))
3708                                 goto out_eio;
3709                         dprintk("%s ", server->data);
3710                 }
3711                 status = decode_pathname(xdr, &loc->rootpath);
3712                 if (unlikely(status != 0))
3713                         goto out_eio;
3714         }
3715         if (res->nlocations != 0)
3716                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3717 out:
3718         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3719         return status;
3720 out_overflow:
3721         print_overflow_msg(__func__, xdr);
3722 out_eio:
3723         status = -EIO;
3724         goto out;
3725 }
3726
3727 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3728 {
3729         __be32 *p;
3730         int status = 0;
3731
3732         *res = 0;
3733         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3734                 return -EIO;
3735         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3736                 p = xdr_inline_decode(xdr, 8);
3737                 if (unlikely(!p))
3738                         goto out_overflow;
3739                 xdr_decode_hyper(p, res);
3740                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3741         }
3742         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3743         return status;
3744 out_overflow:
3745         print_overflow_msg(__func__, xdr);
3746         return -EIO;
3747 }
3748
3749 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3750 {
3751         __be32 *p;
3752         int status = 0;
3753
3754         *maxlink = 1;
3755         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3756                 return -EIO;
3757         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3758                 p = xdr_inline_decode(xdr, 4);
3759                 if (unlikely(!p))
3760                         goto out_overflow;
3761                 *maxlink = be32_to_cpup(p);
3762                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3763         }
3764         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3765         return status;
3766 out_overflow:
3767         print_overflow_msg(__func__, xdr);
3768         return -EIO;
3769 }
3770
3771 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772 {
3773         __be32 *p;
3774         int status = 0;
3775
3776         *maxname = 1024;
3777         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         goto out_overflow;
3783                 *maxname = be32_to_cpup(p);
3784                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785         }
3786         dprintk("%s: maxname=%u\n", __func__, *maxname);
3787         return status;
3788 out_overflow:
3789         print_overflow_msg(__func__, xdr);
3790         return -EIO;
3791 }
3792
3793 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3794 {
3795         __be32 *p;
3796         int status = 0;
3797
3798         *res = 1024;
3799         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3800                 return -EIO;
3801         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3802                 uint64_t maxread;
3803                 p = xdr_inline_decode(xdr, 8);
3804                 if (unlikely(!p))
3805                         goto out_overflow;
3806                 xdr_decode_hyper(p, &maxread);
3807                 if (maxread > 0x7FFFFFFF)
3808                         maxread = 0x7FFFFFFF;
3809                 *res = (uint32_t)maxread;
3810                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811         }
3812         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813         return status;
3814 out_overflow:
3815         print_overflow_msg(__func__, xdr);
3816         return -EIO;
3817 }
3818
3819 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3820 {
3821         __be32 *p;
3822         int status = 0;
3823
3824         *res = 1024;
3825         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3826                 return -EIO;
3827         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3828                 uint64_t maxwrite;
3829                 p = xdr_inline_decode(xdr, 8);
3830                 if (unlikely(!p))
3831                         goto out_overflow;
3832                 xdr_decode_hyper(p, &maxwrite);
3833                 if (maxwrite > 0x7FFFFFFF)
3834                         maxwrite = 0x7FFFFFFF;
3835                 *res = (uint32_t)maxwrite;
3836                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3837         }
3838         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3839         return status;
3840 out_overflow:
3841         print_overflow_msg(__func__, xdr);
3842         return -EIO;
3843 }
3844
3845 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3846 {
3847         uint32_t tmp;
3848         __be32 *p;
3849         int ret = 0;
3850
3851         *mode = 0;
3852         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3853                 return -EIO;
3854         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3855                 p = xdr_inline_decode(xdr, 4);
3856                 if (unlikely(!p))
3857                         goto out_overflow;
3858                 tmp = be32_to_cpup(p);
3859                 *mode = tmp & ~S_IFMT;
3860                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3861                 ret = NFS_ATTR_FATTR_MODE;
3862         }
3863         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3864         return ret;
3865 out_overflow:
3866         print_overflow_msg(__func__, xdr);
3867         return -EIO;
3868 }
3869
3870 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3871 {
3872         __be32 *p;
3873         int ret = 0;
3874
3875         *nlink = 1;
3876         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3877                 return -EIO;
3878         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3879                 p = xdr_inline_decode(xdr, 4);
3880                 if (unlikely(!p))
3881                         goto out_overflow;
3882                 *nlink = be32_to_cpup(p);
3883                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3884                 ret = NFS_ATTR_FATTR_NLINK;
3885         }
3886         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3887         return ret;
3888 out_overflow:
3889         print_overflow_msg(__func__, xdr);
3890         return -EIO;
3891 }
3892
3893 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3894                 const struct nfs_server *server, kuid_t *uid,
3895                 struct nfs4_string *owner_name)
3896 {
3897         uint32_t len;
3898         __be32 *p;
3899         int ret = 0;
3900
3901         *uid = make_kuid(&init_user_ns, -2);
3902         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903                 return -EIO;
3904         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3905                 p = xdr_inline_decode(xdr, 4);
3906                 if (unlikely(!p))
3907                         goto out_overflow;
3908                 len = be32_to_cpup(p);
3909                 p = xdr_inline_decode(xdr, len);
3910                 if (unlikely(!p))
3911                         goto out_overflow;
3912                 if (owner_name != NULL) {
3913                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3914                         if (owner_name->data != NULL) {
3915                                 owner_name->len = len;
3916                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3917                         }
3918                 } else if (len < XDR_MAX_NETOBJ) {
3919                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3920                                 ret = NFS_ATTR_FATTR_OWNER;
3921                         else
3922                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3923                                                 __func__);
3924                 } else
3925                         dprintk("%s: name too long (%u)!\n",
3926                                         __func__, len);
3927                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3928         }
3929         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3930         return ret;
3931 out_overflow:
3932         print_overflow_msg(__func__, xdr);
3933         return -EIO;
3934 }
3935
3936 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3937                 const struct nfs_server *server, kgid_t *gid,
3938                 struct nfs4_string *group_name)
3939 {
3940         uint32_t len;
3941         __be32 *p;
3942         int ret = 0;
3943
3944         *gid = make_kgid(&init_user_ns, -2);
3945         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3946                 return -EIO;
3947         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3948                 p = xdr_inline_decode(xdr, 4);
3949                 if (unlikely(!p))
3950                         goto out_overflow;
3951                 len = be32_to_cpup(p);
3952                 p = xdr_inline_decode(xdr, len);
3953                 if (unlikely(!p))
3954                         goto out_overflow;
3955                 if (group_name != NULL) {
3956                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3957                         if (group_name->data != NULL) {
3958                                 group_name->len = len;
3959                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3960                         }
3961                 } else if (len < XDR_MAX_NETOBJ) {
3962                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3963                                 ret = NFS_ATTR_FATTR_GROUP;
3964                         else
3965                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3966                                                 __func__);
3967                 } else
3968                         dprintk("%s: name too long (%u)!\n",
3969                                         __func__, len);
3970                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3971         }
3972         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3973         return ret;
3974 out_overflow:
3975         print_overflow_msg(__func__, xdr);
3976         return -EIO;
3977 }
3978
3979 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3980 {
3981         uint32_t major = 0, minor = 0;
3982         __be32 *p;
3983         int ret = 0;
3984
3985         *rdev = MKDEV(0,0);
3986         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3987                 return -EIO;
3988         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3989                 dev_t tmp;
3990
3991                 p = xdr_inline_decode(xdr, 8);
3992                 if (unlikely(!p))
3993                         goto out_overflow;
3994                 major = be32_to_cpup(p++);
3995                 minor = be32_to_cpup(p);
3996                 tmp = MKDEV(major, minor);
3997                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3998                         *rdev = tmp;
3999                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4000                 ret = NFS_ATTR_FATTR_RDEV;
4001         }
4002         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4003         return ret;
4004 out_overflow:
4005         print_overflow_msg(__func__, xdr);
4006         return -EIO;
4007 }
4008
4009 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010 {
4011         __be32 *p;
4012         int status = 0;
4013
4014         *res = 0;
4015         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4016                 return -EIO;
4017         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4018                 p = xdr_inline_decode(xdr, 8);
4019                 if (unlikely(!p))
4020                         goto out_overflow;
4021                 xdr_decode_hyper(p, res);
4022                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4023         }
4024         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4025         return status;
4026 out_overflow:
4027         print_overflow_msg(__func__, xdr);
4028         return -EIO;
4029 }
4030
4031 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4032 {
4033         __be32 *p;
4034         int status = 0;
4035
4036         *res = 0;
4037         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4038                 return -EIO;
4039         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4040                 p = xdr_inline_decode(xdr, 8);
4041                 if (unlikely(!p))
4042                         goto out_overflow;
4043                 xdr_decode_hyper(p, res);
4044                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4045         }
4046         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4047         return status;
4048 out_overflow:
4049         print_overflow_msg(__func__, xdr);
4050         return -EIO;
4051 }
4052
4053 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4054 {
4055         __be32 *p;
4056         int status = 0;
4057
4058         *res = 0;
4059         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4060                 return -EIO;
4061         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4062                 p = xdr_inline_decode(xdr, 8);
4063                 if (unlikely(!p))
4064                         goto out_overflow;
4065                 xdr_decode_hyper(p, res);
4066                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4067         }
4068         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4069         return status;
4070 out_overflow:
4071         print_overflow_msg(__func__, xdr);
4072         return -EIO;
4073 }
4074
4075 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4076 {
4077         __be32 *p;
4078         int ret = 0;
4079
4080         *used = 0;
4081         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4082                 return -EIO;
4083         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4084                 p = xdr_inline_decode(xdr, 8);
4085                 if (unlikely(!p))
4086                         goto out_overflow;
4087                 xdr_decode_hyper(p, used);
4088                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4089                 ret = NFS_ATTR_FATTR_SPACE_USED;
4090         }
4091         dprintk("%s: space used=%Lu\n", __func__,
4092                         (unsigned long long)*used);
4093         return ret;
4094 out_overflow:
4095         print_overflow_msg(__func__, xdr);
4096         return -EIO;
4097 }
4098
4099 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4100 {
4101         __be32 *p;
4102         uint64_t sec;
4103         uint32_t nsec;
4104
4105         p = xdr_inline_decode(xdr, 12);
4106         if (unlikely(!p))
4107                 goto out_overflow;
4108         p = xdr_decode_hyper(p, &sec);
4109         nsec = be32_to_cpup(p);
4110         time->tv_sec = (time_t)sec;
4111         time->tv_nsec = (long)nsec;
4112         return 0;
4113 out_overflow:
4114         print_overflow_msg(__func__, xdr);
4115         return -EIO;
4116 }
4117
4118 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4119 {
4120         int status = 0;
4121
4122         time->tv_sec = 0;
4123         time->tv_nsec = 0;
4124         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4125                 return -EIO;
4126         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4127                 status = decode_attr_time(xdr, time);
4128                 if (status == 0)
4129                         status = NFS_ATTR_FATTR_ATIME;
4130                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4131         }
4132         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4133         return status;
4134 }
4135
4136 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4137 {
4138         int status = 0;
4139
4140         time->tv_sec = 0;
4141         time->tv_nsec = 0;
4142         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4143                 return -EIO;
4144         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4145                 status = decode_attr_time(xdr, time);
4146                 if (status == 0)
4147                         status = NFS_ATTR_FATTR_CTIME;
4148                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4149         }
4150         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4151         return status;
4152 }
4153
4154 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4155                                   struct timespec *time)
4156 {
4157         int status = 0;
4158
4159         time->tv_sec = 0;
4160         time->tv_nsec = 0;
4161         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4162                 return -EIO;
4163         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4164                 status = decode_attr_time(xdr, time);
4165                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4166         }
4167         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4168                 (long)time->tv_nsec);
4169         return status;
4170 }
4171
4172 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4173                                         struct nfs4_label *label)
4174 {
4175         uint32_t pi = 0;
4176         uint32_t lfs = 0;
4177         __u32 len;
4178         __be32 *p;
4179         int status = 0;
4180
4181         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4182                 return -EIO;
4183         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4184                 p = xdr_inline_decode(xdr, 4);
4185                 if (unlikely(!p))
4186                         goto out_overflow;
4187                 lfs = be32_to_cpup(p++);
4188                 p = xdr_inline_decode(xdr, 4);
4189                 if (unlikely(!p))
4190                         goto out_overflow;
4191                 pi = be32_to_cpup(p++);
4192                 p = xdr_inline_decode(xdr, 4);
4193                 if (unlikely(!p))
4194                         goto out_overflow;
4195                 len = be32_to_cpup(p++);
4196                 p = xdr_inline_decode(xdr, len);
4197                 if (unlikely(!p))
4198                         goto out_overflow;
4199                 if (len < NFS4_MAXLABELLEN) {
4200                         if (label) {
4201                                 memcpy(label->label, p, len);
4202                                 label->len = len;
4203                                 label->pi = pi;
4204                                 label->lfs = lfs;
4205                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4206                         }
4207                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4208                 } else
4209                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4210                                         __func__, len);
4211         }
4212         if (label && label->label)
4213                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4214                         (char *)label->label, label->len, label->pi, label->lfs);
4215         return status;
4216
4217 out_overflow:
4218         print_overflow_msg(__func__, xdr);
4219         return -EIO;
4220 }
4221
4222 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4223 {
4224         int status = 0;
4225
4226         time->tv_sec = 0;
4227         time->tv_nsec = 0;
4228         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4229                 return -EIO;
4230         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4231                 status = decode_attr_time(xdr, time);
4232                 if (status == 0)
4233                         status = NFS_ATTR_FATTR_MTIME;
4234                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4235         }
4236         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4237         return status;
4238 }
4239
4240 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4241 {
4242         unsigned int attrwords = XDR_QUADLEN(attrlen);
4243         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4244
4245         if (unlikely(attrwords != nwords)) {
4246                 dprintk("%s: server returned incorrect attribute length: "
4247                         "%u %c %u\n",
4248                                 __func__,
4249                                 attrwords << 2,
4250                                 (attrwords < nwords) ? '<' : '>',
4251                                 nwords << 2);
4252                 return -EIO;
4253         }
4254         return 0;
4255 }
4256
4257 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4258 {
4259         __be32 *p;
4260
4261         p = xdr_inline_decode(xdr, 20);
4262         if (unlikely(!p))
4263                 goto out_overflow;
4264         cinfo->atomic = be32_to_cpup(p++);
4265         p = xdr_decode_hyper(p, &cinfo->before);
4266         xdr_decode_hyper(p, &cinfo->after);
4267         return 0;
4268 out_overflow:
4269         print_overflow_msg(__func__, xdr);
4270         return -EIO;
4271 }
4272
4273 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4274 {
4275         __be32 *p;
4276         uint32_t supp, acc;
4277         int status;
4278
4279         status = decode_op_hdr(xdr, OP_ACCESS);
4280         if (status)
4281                 return status;
4282         p = xdr_inline_decode(xdr, 8);
4283         if (unlikely(!p))
4284                 goto out_overflow;
4285         supp = be32_to_cpup(p++);
4286         acc = be32_to_cpup(p);
4287         *supported = supp;
4288         *access = acc;
4289         return 0;
4290 out_overflow:
4291         print_overflow_msg(__func__, xdr);
4292         return -EIO;
4293 }
4294
4295 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4296 {
4297         __be32 *p;
4298
4299         p = xdr_inline_decode(xdr, len);
4300         if (likely(p)) {
4301                 memcpy(buf, p, len);
4302                 return 0;
4303         }
4304         print_overflow_msg(__func__, xdr);
4305         return -EIO;
4306 }
4307
4308 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309 {
4310         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4311 }
4312
4313 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4314 {
4315         stateid->type = NFS4_OPEN_STATEID_TYPE;
4316         return decode_stateid(xdr, stateid);
4317 }
4318
4319 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4320 {
4321         stateid->type = NFS4_LOCK_STATEID_TYPE;
4322         return decode_stateid(xdr, stateid);
4323 }
4324
4325 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4326 {
4327         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4328         return decode_stateid(xdr, stateid);
4329 }
4330
4331 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4332 {
4333         int status;
4334
4335         status = decode_op_hdr(xdr, OP_CLOSE);
4336         if (status != -EIO)
4337                 nfs_increment_open_seqid(status, res->seqid);
4338         if (!status)
4339                 status = decode_open_stateid(xdr, &res->stateid);
4340         return status;
4341 }
4342
4343 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4344 {
4345         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4346 }
4347
4348 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4349 {
4350         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4351 }
4352
4353 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4354 {
4355         int status;
4356
4357         status = decode_op_hdr(xdr, OP_COMMIT);
4358         if (!status)
4359                 status = decode_write_verifier(xdr, &res->verf->verifier);
4360         return status;
4361 }
4362
4363 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4364 {
4365         __be32 *p;
4366         uint32_t bmlen;
4367         int status;
4368
4369         status = decode_op_hdr(xdr, OP_CREATE);
4370         if (status)
4371                 return status;
4372         if ((status = decode_change_info(xdr, cinfo)))
4373                 return status;
4374         p = xdr_inline_decode(xdr, 4);
4375         if (unlikely(!p))
4376                 goto out_overflow;
4377         bmlen = be32_to_cpup(p);
4378         p = xdr_inline_decode(xdr, bmlen << 2);
4379         if (likely(p))
4380                 return 0;
4381 out_overflow:
4382         print_overflow_msg(__func__, xdr);
4383         return -EIO;
4384 }
4385
4386 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4387 {
4388         unsigned int savep;
4389         uint32_t attrlen, bitmap[3] = {0};
4390         int status;
4391
4392         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4395                 goto xdr_error;
4396         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4399                 goto xdr_error;
4400         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4401                                                  &res->fh_expire_type)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4404                 goto xdr_error;
4405         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4406                 goto xdr_error;
4407         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4408                 goto xdr_error;
4409         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4410                                 res->exclcreat_bitmask)) != 0)
4411                 goto xdr_error;
4412         status = verify_attr_len(xdr, savep, attrlen);
4413 xdr_error:
4414         dprintk("%s: xdr returned %d!\n", __func__, -status);
4415         return status;
4416 }
4417
4418 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4419 {
4420         unsigned int savep;
4421         uint32_t attrlen, bitmap[3] = {0};
4422         int status;
4423
4424         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4425                 goto xdr_error;
4426         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4427                 goto xdr_error;
4428         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4429                 goto xdr_error;
4430
4431         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4432                 goto xdr_error;
4433         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4434                 goto xdr_error;
4435         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4436                 goto xdr_error;
4437
4438         status = -EIO;
4439         if (unlikely(bitmap[0]))
4440                 goto xdr_error;
4441
4442         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4443                 goto xdr_error;
4444         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4445                 goto xdr_error;
4446         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4447                 goto xdr_error;
4448
4449         status = verify_attr_len(xdr, savep, attrlen);
4450 xdr_error:
4451         dprintk("%s: xdr returned %d!\n", __func__, -status);
4452         return status;
4453 }
4454
4455 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4456 {
4457         unsigned int savep;
4458         uint32_t attrlen, bitmap[3] = {0};
4459         int status;
4460
4461         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4462                 goto xdr_error;
4463         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4464                 goto xdr_error;
4465         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4466                 goto xdr_error;
4467
4468         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4469                 goto xdr_error;
4470         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4471                 goto xdr_error;
4472
4473         status = verify_attr_len(xdr, savep, attrlen);
4474 xdr_error:
4475         dprintk("%s: xdr returned %d!\n", __func__, -status);
4476         return status;
4477 }
4478
4479 static int decode_threshold_hint(struct xdr_stream *xdr,
4480                                   uint32_t *bitmap,
4481                                   uint64_t *res,
4482                                   uint32_t hint_bit)
4483 {
4484         __be32 *p;
4485
4486         *res = 0;
4487         if (likely(bitmap[0] & hint_bit)) {
4488                 p = xdr_inline_decode(xdr, 8);
4489                 if (unlikely(!p))
4490                         goto out_overflow;
4491                 xdr_decode_hyper(p, res);
4492         }
4493         return 0;
4494 out_overflow:
4495         print_overflow_msg(__func__, xdr);
4496         return -EIO;
4497 }
4498
4499 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4500                                         struct nfs4_threshold *res)
4501 {
4502         __be32 *p;
4503         unsigned int savep;
4504         uint32_t bitmap[3] = {0,}, attrlen;
4505         int status;
4506
4507         /* layout type */
4508         p = xdr_inline_decode(xdr, 4);
4509         if (unlikely(!p)) {
4510                 print_overflow_msg(__func__, xdr);
4511                 return -EIO;
4512         }
4513         res->l_type = be32_to_cpup(p);
4514
4515         /* thi_hintset bitmap */
4516         status = decode_attr_bitmap(xdr, bitmap);
4517         if (status < 0)
4518                 goto xdr_error;
4519
4520         /* thi_hintlist length */
4521         status = decode_attr_length(xdr, &attrlen, &savep);
4522         if (status < 0)
4523                 goto xdr_error;
4524         /* thi_hintlist */
4525         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4526         if (status < 0)
4527                 goto xdr_error;
4528         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4529         if (status < 0)
4530                 goto xdr_error;
4531         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4532                                        THRESHOLD_RD_IO);
4533         if (status < 0)
4534                 goto xdr_error;
4535         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4536                                        THRESHOLD_WR_IO);
4537         if (status < 0)
4538                 goto xdr_error;
4539
4540         status = verify_attr_len(xdr, savep, attrlen);
4541         res->bm = bitmap[0];
4542
4543         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4544                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4545                 res->wr_io_sz);
4546 xdr_error:
4547         dprintk("%s ret=%d!\n", __func__, status);
4548         return status;
4549 }
4550
4551 /*
4552  * Thresholds on pNFS direct I/O vrs MDS I/O
4553  */
4554 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4555                                     uint32_t *bitmap,
4556                                     struct nfs4_threshold *res)
4557 {
4558         __be32 *p;
4559         int status = 0;
4560         uint32_t num;
4561
4562         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4563                 return -EIO;
4564         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4565                 /* Did the server return an unrequested attribute? */
4566                 if (unlikely(res == NULL))
4567                         return -EREMOTEIO;
4568                 p = xdr_inline_decode(xdr, 4);
4569                 if (unlikely(!p))
4570                         goto out_overflow;
4571                 num = be32_to_cpup(p);
4572                 if (num == 0)
4573                         return 0;
4574                 if (num > 1)
4575                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4576                                 "drivers per filesystem not supported\n",
4577                                 __func__);
4578
4579                 status = decode_first_threshold_item4(xdr, res);
4580                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4581         }
4582         return status;
4583 out_overflow:
4584         print_overflow_msg(__func__, xdr);
4585         return -EIO;
4586 }
4587
4588 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4589                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4590                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4591                 const struct nfs_server *server)
4592 {
4593         int status;
4594         umode_t fmode = 0;
4595         uint32_t type;
4596         int32_t err;
4597
4598         status = decode_attr_type(xdr, bitmap, &type);
4599         if (status < 0)
4600                 goto xdr_error;
4601         fattr->mode = 0;
4602         if (status != 0) {
4603                 fattr->mode |= nfs_type2fmt[type];
4604                 fattr->valid |= status;
4605         }
4606
4607         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4608         if (status < 0)
4609                 goto xdr_error;
4610         fattr->valid |= status;
4611
4612         status = decode_attr_size(xdr, bitmap, &fattr->size);
4613         if (status < 0)
4614                 goto xdr_error;
4615         fattr->valid |= status;
4616
4617         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4618         if (status < 0)
4619                 goto xdr_error;
4620         fattr->valid |= status;
4621
4622         err = 0;
4623         status = decode_attr_error(xdr, bitmap, &err);
4624         if (status < 0)
4625                 goto xdr_error;
4626
4627         status = decode_attr_filehandle(xdr, bitmap, fh);
4628         if (status < 0)
4629                 goto xdr_error;
4630
4631         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4632         if (status < 0)
4633                 goto xdr_error;
4634         fattr->valid |= status;
4635
4636         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4637         if (status < 0)
4638                 goto xdr_error;
4639         fattr->valid |= status;
4640
4641         status = -EIO;
4642         if (unlikely(bitmap[0]))
4643                 goto xdr_error;
4644
4645         status = decode_attr_mode(xdr, bitmap, &fmode);
4646         if (status < 0)
4647                 goto xdr_error;
4648         if (status != 0) {
4649                 fattr->mode |= fmode;
4650                 fattr->valid |= status;
4651         }
4652
4653         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4654         if (status < 0)
4655                 goto xdr_error;
4656         fattr->valid |= status;
4657
4658         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4659         if (status < 0)
4660                 goto xdr_error;
4661         fattr->valid |= status;
4662
4663         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4664         if (status < 0)
4665                 goto xdr_error;
4666         fattr->valid |= status;
4667
4668         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4669         if (status < 0)
4670                 goto xdr_error;
4671         fattr->valid |= status;
4672
4673         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4674         if (status < 0)
4675                 goto xdr_error;
4676         fattr->valid |= status;
4677
4678         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4679         if (status < 0)
4680                 goto xdr_error;
4681         fattr->valid |= status;
4682
4683         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4684         if (status < 0)
4685                 goto xdr_error;
4686         fattr->valid |= status;
4687
4688         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4689         if (status < 0)
4690                 goto xdr_error;
4691         fattr->valid |= status;
4692
4693         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4694         if (status < 0)
4695                 goto xdr_error;
4696         fattr->valid |= status;
4697
4698         status = -EIO;
4699         if (unlikely(bitmap[1]))
4700                 goto xdr_error;
4701
4702         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4703         if (status < 0)
4704                 goto xdr_error;
4705
4706         if (label) {
4707                 status = decode_attr_security_label(xdr, bitmap, label);
4708                 if (status < 0)
4709                         goto xdr_error;
4710                 fattr->valid |= status;
4711         }
4712
4713 xdr_error:
4714         dprintk("%s: xdr returned %d\n", __func__, -status);
4715         return status;
4716 }
4717
4718 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4719                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4720                 struct nfs4_label *label, const struct nfs_server *server)
4721 {
4722         unsigned int savep;
4723         uint32_t attrlen,
4724                  bitmap[3] = {0};
4725         int status;
4726
4727         status = decode_op_hdr(xdr, OP_GETATTR);
4728         if (status < 0)
4729                 goto xdr_error;
4730
4731         status = decode_attr_bitmap(xdr, bitmap);
4732         if (status < 0)
4733                 goto xdr_error;
4734
4735         status = decode_attr_length(xdr, &attrlen, &savep);
4736         if (status < 0)
4737                 goto xdr_error;
4738
4739         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4740                                         label, server);
4741         if (status < 0)
4742                 goto xdr_error;
4743
4744         status = verify_attr_len(xdr, savep, attrlen);
4745 xdr_error:
4746         dprintk("%s: xdr returned %d\n", __func__, -status);
4747         return status;
4748 }
4749
4750 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4751                 struct nfs4_label *label, const struct nfs_server *server)
4752 {
4753         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4754 }
4755
4756 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4757                 const struct nfs_server *server)
4758 {
4759         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4760 }
4761
4762 /*
4763  * Decode potentially multiple layout types.
4764  */
4765 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4766                                     struct nfs_fsinfo *fsinfo)
4767 {
4768         __be32 *p;
4769         uint32_t i;
4770
4771         p = xdr_inline_decode(xdr, 4);
4772         if (unlikely(!p))
4773                 goto out_overflow;
4774         fsinfo->nlayouttypes = be32_to_cpup(p);
4775
4776         /* pNFS is not supported by the underlying file system */
4777         if (fsinfo->nlayouttypes == 0)
4778                 return 0;
4779
4780         /* Decode and set first layout type, move xdr->p past unused types */
4781         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4782         if (unlikely(!p))
4783                 goto out_overflow;
4784
4785         /* If we get too many, then just cap it at the max */
4786         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4787                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4788                         __func__, fsinfo->nlayouttypes);
4789                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4790         }
4791
4792         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4793                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4794         return 0;
4795 out_overflow:
4796         print_overflow_msg(__func__, xdr);
4797         return -EIO;
4798 }
4799
4800 /*
4801  * The type of file system exported.
4802  * Note we must ensure that layouttype is set in any non-error case.
4803  */
4804 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4805                                 struct nfs_fsinfo *fsinfo)
4806 {
4807         int status = 0;
4808
4809         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4810         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4811                 return -EIO;
4812         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4813                 status = decode_pnfs_layout_types(xdr, fsinfo);
4814                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4815         }
4816         return status;
4817 }
4818
4819 /*
4820  * The prefered block size for layout directed io
4821  */
4822 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4823                                       uint32_t *res)
4824 {
4825         __be32 *p;
4826
4827         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4828         *res = 0;
4829         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4830                 p = xdr_inline_decode(xdr, 4);
4831                 if (unlikely(!p)) {
4832                         print_overflow_msg(__func__, xdr);
4833                         return -EIO;
4834                 }
4835                 *res = be32_to_cpup(p);
4836                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4837         }
4838         return 0;
4839 }
4840
4841 /*
4842  * The granularity of a CLONE operation.
4843  */
4844 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4845                                      uint32_t *res)
4846 {
4847         __be32 *p;
4848
4849         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4850         *res = 0;
4851         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4852                 p = xdr_inline_decode(xdr, 4);
4853                 if (unlikely(!p)) {
4854                         print_overflow_msg(__func__, xdr);
4855                         return -EIO;
4856                 }
4857                 *res = be32_to_cpup(p);
4858                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4859         }
4860         return 0;
4861 }
4862
4863 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4864 {
4865         unsigned int savep;
4866         uint32_t attrlen, bitmap[3];
4867         int status;
4868
4869         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4870                 goto xdr_error;
4871         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4872                 goto xdr_error;
4873         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4874                 goto xdr_error;
4875
4876         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4877
4878         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4879                 goto xdr_error;
4880         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4881                 goto xdr_error;
4882         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4883                 goto xdr_error;
4884         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4885         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4886                 goto xdr_error;
4887         fsinfo->wtpref = fsinfo->wtmax;
4888
4889         status = -EIO;
4890         if (unlikely(bitmap[0]))
4891                 goto xdr_error;
4892
4893         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4894         if (status != 0)
4895                 goto xdr_error;
4896         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4897         if (status != 0)
4898                 goto xdr_error;
4899
4900         status = -EIO;
4901         if (unlikely(bitmap[1]))
4902                 goto xdr_error;
4903
4904         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4905         if (status)
4906                 goto xdr_error;
4907         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4908         if (status)
4909                 goto xdr_error;
4910
4911         status = verify_attr_len(xdr, savep, attrlen);
4912 xdr_error:
4913         dprintk("%s: xdr returned %d!\n", __func__, -status);
4914         return status;
4915 }
4916
4917 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4918 {
4919         __be32 *p;
4920         uint32_t len;
4921         int status;
4922
4923         /* Zero handle first to allow comparisons */
4924         memset(fh, 0, sizeof(*fh));
4925
4926         status = decode_op_hdr(xdr, OP_GETFH);
4927         if (status)
4928                 return status;
4929
4930         p = xdr_inline_decode(xdr, 4);
4931         if (unlikely(!p))
4932                 goto out_overflow;
4933         len = be32_to_cpup(p);
4934         if (len > NFS4_FHSIZE)
4935                 return -EIO;
4936         fh->size = len;
4937         p = xdr_inline_decode(xdr, len);
4938         if (unlikely(!p))
4939                 goto out_overflow;
4940         memcpy(fh->data, p, len);
4941         return 0;
4942 out_overflow:
4943         print_overflow_msg(__func__, xdr);
4944         return -EIO;
4945 }
4946
4947 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4948 {
4949         int status;
4950
4951         status = decode_op_hdr(xdr, OP_LINK);
4952         if (status)
4953                 return status;
4954         return decode_change_info(xdr, cinfo);
4955 }
4956
4957 /*
4958  * We create the owner, so we know a proper owner.id length is 4.
4959  */
4960 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4961 {
4962         uint64_t offset, length, clientid;
4963         __be32 *p;
4964         uint32_t namelen, type;
4965
4966         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4967         if (unlikely(!p))
4968                 goto out_overflow;
4969         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4970         p = xdr_decode_hyper(p, &length);
4971         type = be32_to_cpup(p++); /* 4 byte read */
4972         if (fl != NULL) { /* manipulate file lock */
4973                 fl->fl_start = (loff_t)offset;
4974                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4975                 if (length == ~(uint64_t)0)
4976                         fl->fl_end = OFFSET_MAX;
4977                 fl->fl_type = F_WRLCK;
4978                 if (type & 1)
4979                         fl->fl_type = F_RDLCK;
4980                 fl->fl_pid = 0;
4981         }
4982         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4983         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4984         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4985         if (likely(p))
4986                 return -NFS4ERR_DENIED;
4987 out_overflow:
4988         print_overflow_msg(__func__, xdr);
4989         return -EIO;
4990 }
4991
4992 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4993 {
4994         int status;
4995
4996         status = decode_op_hdr(xdr, OP_LOCK);
4997         if (status == -EIO)
4998                 goto out;
4999         if (status == 0) {
5000                 status = decode_lock_stateid(xdr, &res->stateid);
5001                 if (unlikely(status))
5002                         goto out;
5003         } else if (status == -NFS4ERR_DENIED)
5004                 status = decode_lock_denied(xdr, NULL);
5005         if (res->open_seqid != NULL)
5006                 nfs_increment_open_seqid(status, res->open_seqid);
5007         nfs_increment_lock_seqid(status, res->lock_seqid);
5008 out:
5009         return status;
5010 }
5011
5012 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5013 {
5014         int status;
5015         status = decode_op_hdr(xdr, OP_LOCKT);
5016         if (status == -NFS4ERR_DENIED)
5017                 return decode_lock_denied(xdr, res->denied);
5018         return status;
5019 }
5020
5021 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5022 {
5023         int status;
5024
5025         status = decode_op_hdr(xdr, OP_LOCKU);
5026         if (status != -EIO)
5027                 nfs_increment_lock_seqid(status, res->seqid);
5028         if (status == 0)
5029                 status = decode_lock_stateid(xdr, &res->stateid);
5030         return status;
5031 }
5032
5033 static int decode_release_lockowner(struct xdr_stream *xdr)
5034 {
5035         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5036 }
5037
5038 static int decode_lookup(struct xdr_stream *xdr)
5039 {
5040         return decode_op_hdr(xdr, OP_LOOKUP);
5041 }
5042
5043 /* This is too sick! */
5044 static int decode_space_limit(struct xdr_stream *xdr,
5045                 unsigned long *pagemod_limit)
5046 {
5047         __be32 *p;
5048         uint32_t limit_type, nblocks, blocksize;
5049         u64 maxsize = 0;
5050
5051         p = xdr_inline_decode(xdr, 12);
5052         if (unlikely(!p))
5053                 goto out_overflow;
5054         limit_type = be32_to_cpup(p++);
5055         switch (limit_type) {
5056         case NFS4_LIMIT_SIZE:
5057                 xdr_decode_hyper(p, &maxsize);
5058                 break;
5059         case NFS4_LIMIT_BLOCKS:
5060                 nblocks = be32_to_cpup(p++);
5061                 blocksize = be32_to_cpup(p);
5062                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5063         }
5064         maxsize >>= PAGE_SHIFT;
5065         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5066         return 0;
5067 out_overflow:
5068         print_overflow_msg(__func__, xdr);
5069         return -EIO;
5070 }
5071
5072 static int decode_rw_delegation(struct xdr_stream *xdr,
5073                 uint32_t delegation_type,
5074                 struct nfs_openres *res)
5075 {
5076         __be32 *p;
5077         int status;
5078
5079         status = decode_delegation_stateid(xdr, &res->delegation);
5080         if (unlikely(status))
5081                 return status;
5082         p = xdr_inline_decode(xdr, 4);
5083         if (unlikely(!p))
5084                 goto out_overflow;
5085         res->do_recall = be32_to_cpup(p);
5086
5087         switch (delegation_type) {
5088         case NFS4_OPEN_DELEGATE_READ:
5089                 res->delegation_type = FMODE_READ;
5090                 break;
5091         case NFS4_OPEN_DELEGATE_WRITE:
5092                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5093                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5094                                 return -EIO;
5095         }
5096         return decode_ace(xdr, NULL, res->server->nfs_client);
5097 out_overflow:
5098         print_overflow_msg(__func__, xdr);
5099         return -EIO;
5100 }
5101
5102 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5103 {
5104         __be32 *p;
5105         uint32_t why_no_delegation;
5106
5107         p = xdr_inline_decode(xdr, 4);
5108         if (unlikely(!p))
5109                 goto out_overflow;
5110         why_no_delegation = be32_to_cpup(p);
5111         switch (why_no_delegation) {
5112                 case WND4_CONTENTION:
5113                 case WND4_RESOURCE:
5114                         xdr_inline_decode(xdr, 4);
5115                         /* Ignore for now */
5116         }
5117         return 0;
5118 out_overflow:
5119         print_overflow_msg(__func__, xdr);
5120         return -EIO;
5121 }
5122
5123 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5124 {
5125         __be32 *p;
5126         uint32_t delegation_type;
5127
5128         p = xdr_inline_decode(xdr, 4);
5129         if (unlikely(!p))
5130                 goto out_overflow;
5131         delegation_type = be32_to_cpup(p);
5132         res->delegation_type = 0;
5133         switch (delegation_type) {
5134         case NFS4_OPEN_DELEGATE_NONE:
5135                 return 0;
5136         case NFS4_OPEN_DELEGATE_READ:
5137         case NFS4_OPEN_DELEGATE_WRITE:
5138                 return decode_rw_delegation(xdr, delegation_type, res);
5139         case NFS4_OPEN_DELEGATE_NONE_EXT:
5140                 return decode_no_delegation(xdr, res);
5141         }
5142         return -EIO;
5143 out_overflow:
5144         print_overflow_msg(__func__, xdr);
5145         return -EIO;
5146 }
5147
5148 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5149 {
5150         __be32 *p;
5151         uint32_t savewords, bmlen, i;
5152         int status;
5153
5154         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5155                 return status;
5156         nfs_increment_open_seqid(status, res->seqid);
5157         if (status)
5158                 return status;
5159         status = decode_open_stateid(xdr, &res->stateid);
5160         if (unlikely(status))
5161                 return status;
5162
5163         decode_change_info(xdr, &res->cinfo);
5164
5165         p = xdr_inline_decode(xdr, 8);
5166         if (unlikely(!p))
5167                 goto out_overflow;
5168         res->rflags = be32_to_cpup(p++);
5169         bmlen = be32_to_cpup(p);
5170         if (bmlen > 10)
5171                 goto xdr_error;
5172
5173         p = xdr_inline_decode(xdr, bmlen << 2);
5174         if (unlikely(!p))
5175                 goto out_overflow;
5176         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5177         for (i = 0; i < savewords; ++i)
5178                 res->attrset[i] = be32_to_cpup(p++);
5179         for (; i < NFS4_BITMAP_SIZE; i++)
5180                 res->attrset[i] = 0;
5181
5182         return decode_delegation(xdr, res);
5183 xdr_error:
5184         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5185         return -EIO;
5186 out_overflow:
5187         print_overflow_msg(__func__, xdr);
5188         return -EIO;
5189 }
5190
5191 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5192 {
5193         int status;
5194
5195         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5196         if (status != -EIO)
5197                 nfs_increment_open_seqid(status, res->seqid);
5198         if (!status)
5199                 status = decode_open_stateid(xdr, &res->stateid);
5200         return status;
5201 }
5202
5203 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5204 {
5205         int status;
5206
5207         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5208         if (status != -EIO)
5209                 nfs_increment_open_seqid(status, res->seqid);
5210         if (!status)
5211                 status = decode_open_stateid(xdr, &res->stateid);
5212         return status;
5213 }
5214
5215 static int decode_putfh(struct xdr_stream *xdr)
5216 {
5217         return decode_op_hdr(xdr, OP_PUTFH);
5218 }
5219
5220 static int decode_putrootfh(struct xdr_stream *xdr)
5221 {
5222         return decode_op_hdr(xdr, OP_PUTROOTFH);
5223 }
5224
5225 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5226                        struct nfs_pgio_res *res)
5227 {
5228         __be32 *p;
5229         uint32_t count, eof, recvd;
5230         int status;
5231
5232         status = decode_op_hdr(xdr, OP_READ);
5233         if (status)
5234                 return status;
5235         p = xdr_inline_decode(xdr, 8);
5236         if (unlikely(!p))
5237                 goto out_overflow;
5238         eof = be32_to_cpup(p++);
5239         count = be32_to_cpup(p);
5240         recvd = xdr_read_pages(xdr, count);
5241         if (count > recvd) {
5242                 dprintk("NFS: server cheating in read reply: "
5243                                 "count %u > recvd %u\n", count, recvd);
5244                 count = recvd;
5245                 eof = 0;
5246         }
5247         res->eof = eof;
5248         res->count = count;
5249         return 0;
5250 out_overflow:
5251         print_overflow_msg(__func__, xdr);
5252         return -EIO;
5253 }
5254
5255 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5256 {
5257         int             status;
5258         __be32          verf[2];
5259
5260         status = decode_op_hdr(xdr, OP_READDIR);
5261         if (!status)
5262                 status = decode_verifier(xdr, readdir->verifier.data);
5263         if (unlikely(status))
5264                 return status;
5265         memcpy(verf, readdir->verifier.data, sizeof(verf));
5266         dprintk("%s: verifier = %08x:%08x\n",
5267                         __func__, verf[0], verf[1]);
5268         return xdr_read_pages(xdr, xdr->buf->page_len);
5269 }
5270
5271 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5272 {
5273         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5274         u32 len, recvd;
5275         __be32 *p;
5276         int status;
5277
5278         status = decode_op_hdr(xdr, OP_READLINK);
5279         if (status)
5280                 return status;
5281
5282         /* Convert length of symlink */
5283         p = xdr_inline_decode(xdr, 4);
5284         if (unlikely(!p))
5285                 goto out_overflow;
5286         len = be32_to_cpup(p);
5287         if (len >= rcvbuf->page_len || len <= 0) {
5288                 dprintk("nfs: server returned giant symlink!\n");
5289                 return -ENAMETOOLONG;
5290         }
5291         recvd = xdr_read_pages(xdr, len);
5292         if (recvd < len) {
5293                 dprintk("NFS: server cheating in readlink reply: "
5294                                 "count %u > recvd %u\n", len, recvd);
5295                 return -EIO;
5296         }
5297         /*
5298          * The XDR encode routine has set things up so that
5299          * the link text will be copied directly into the
5300          * buffer.  We just have to do overflow-checking,
5301          * and and null-terminate the text (the VFS expects
5302          * null-termination).
5303          */
5304         xdr_terminate_string(rcvbuf, len);
5305         return 0;
5306 out_overflow:
5307         print_overflow_msg(__func__, xdr);
5308         return -EIO;
5309 }
5310
5311 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5312 {
5313         int status;
5314
5315         status = decode_op_hdr(xdr, OP_REMOVE);
5316         if (status)
5317                 goto out;
5318         status = decode_change_info(xdr, cinfo);
5319 out:
5320         return status;
5321 }
5322
5323 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5324               struct nfs4_change_info *new_cinfo)
5325 {
5326         int status;
5327
5328         status = decode_op_hdr(xdr, OP_RENAME);
5329         if (status)
5330                 goto out;
5331         if ((status = decode_change_info(xdr, old_cinfo)))
5332                 goto out;
5333         status = decode_change_info(xdr, new_cinfo);
5334 out:
5335         return status;
5336 }
5337
5338 static int decode_renew(struct xdr_stream *xdr)
5339 {
5340         return decode_op_hdr(xdr, OP_RENEW);
5341 }
5342
5343 static int
5344 decode_restorefh(struct xdr_stream *xdr)
5345 {
5346         return decode_op_hdr(xdr, OP_RESTOREFH);
5347 }
5348
5349 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5350                          struct nfs_getaclres *res)
5351 {
5352         unsigned int savep;
5353         uint32_t attrlen,
5354                  bitmap[3] = {0};
5355         int status;
5356         unsigned int pg_offset;
5357
5358         res->acl_len = 0;
5359         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5360                 goto out;
5361
5362         xdr_enter_page(xdr, xdr->buf->page_len);
5363
5364         /* Calculate the offset of the page data */
5365         pg_offset = xdr->buf->head[0].iov_len;
5366
5367         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5368                 goto out;
5369         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5370                 goto out;
5371
5372         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5373                 return -EIO;
5374         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5375
5376                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5377                  * are stored with the acl data to handle the problem of
5378                  * variable length bitmaps.*/
5379                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5380                 res->acl_len = attrlen;
5381
5382                 /* Check for receive buffer overflow */
5383                 if (res->acl_len > (xdr->nwords << 2) ||
5384                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5385                         res->acl_flags |= NFS4_ACL_TRUNC;
5386                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5387                                         attrlen, xdr->nwords << 2);
5388                 }
5389         } else
5390                 status = -EOPNOTSUPP;
5391
5392 out:
5393         return status;
5394 }
5395
5396 static int
5397 decode_savefh(struct xdr_stream *xdr)
5398 {
5399         return decode_op_hdr(xdr, OP_SAVEFH);
5400 }
5401
5402 static int decode_setattr(struct xdr_stream *xdr)
5403 {
5404         __be32 *p;
5405         uint32_t bmlen;
5406         int status;
5407
5408         status = decode_op_hdr(xdr, OP_SETATTR);
5409         if (status)
5410                 return status;
5411         p = xdr_inline_decode(xdr, 4);
5412         if (unlikely(!p))
5413                 goto out_overflow;
5414         bmlen = be32_to_cpup(p);
5415         p = xdr_inline_decode(xdr, bmlen << 2);
5416         if (likely(p))
5417                 return 0;
5418 out_overflow:
5419         print_overflow_msg(__func__, xdr);
5420         return -EIO;
5421 }
5422
5423 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5424 {
5425         __be32 *p;
5426         uint32_t opnum;
5427         int32_t nfserr;
5428
5429         p = xdr_inline_decode(xdr, 8);
5430         if (unlikely(!p))
5431                 goto out_overflow;
5432         opnum = be32_to_cpup(p++);
5433         if (opnum != OP_SETCLIENTID) {
5434                 dprintk("nfs: decode_setclientid: Server returned operation"
5435                         " %d\n", opnum);
5436                 return -EIO;
5437         }
5438         nfserr = be32_to_cpup(p);
5439         if (nfserr == NFS_OK) {
5440                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5441                 if (unlikely(!p))
5442                         goto out_overflow;
5443                 p = xdr_decode_hyper(p, &res->clientid);
5444                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5445         } else if (nfserr == NFSERR_CLID_INUSE) {
5446                 uint32_t len;
5447
5448                 /* skip netid string */
5449                 p = xdr_inline_decode(xdr, 4);
5450                 if (unlikely(!p))
5451                         goto out_overflow;
5452                 len = be32_to_cpup(p);
5453                 p = xdr_inline_decode(xdr, len);
5454                 if (unlikely(!p))
5455                         goto out_overflow;
5456
5457                 /* skip uaddr string */
5458                 p = xdr_inline_decode(xdr, 4);
5459                 if (unlikely(!p))
5460                         goto out_overflow;
5461                 len = be32_to_cpup(p);
5462                 p = xdr_inline_decode(xdr, len);
5463                 if (unlikely(!p))
5464                         goto out_overflow;
5465                 return -NFSERR_CLID_INUSE;
5466         } else
5467                 return nfs4_stat_to_errno(nfserr);
5468
5469         return 0;
5470 out_overflow:
5471         print_overflow_msg(__func__, xdr);
5472         return -EIO;
5473 }
5474
5475 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5476 {
5477         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5478 }
5479
5480 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5481 {
5482         __be32 *p;
5483         int status;
5484
5485         status = decode_op_hdr(xdr, OP_WRITE);
5486         if (status)
5487                 return status;
5488
5489         p = xdr_inline_decode(xdr, 8);
5490         if (unlikely(!p))
5491                 goto out_overflow;
5492         res->count = be32_to_cpup(p++);
5493         res->verf->committed = be32_to_cpup(p++);
5494         return decode_write_verifier(xdr, &res->verf->verifier);
5495 out_overflow:
5496         print_overflow_msg(__func__, xdr);
5497         return -EIO;
5498 }
5499
5500 static int decode_delegreturn(struct xdr_stream *xdr)
5501 {
5502         return decode_op_hdr(xdr, OP_DELEGRETURN);
5503 }
5504
5505 static int decode_secinfo_gss(struct xdr_stream *xdr,
5506                               struct nfs4_secinfo4 *flavor)
5507 {
5508         u32 oid_len;
5509         __be32 *p;
5510
5511         p = xdr_inline_decode(xdr, 4);
5512         if (unlikely(!p))
5513                 goto out_overflow;
5514         oid_len = be32_to_cpup(p);
5515         if (oid_len > GSS_OID_MAX_LEN)
5516                 goto out_err;
5517
5518         p = xdr_inline_decode(xdr, oid_len);
5519         if (unlikely(!p))
5520                 goto out_overflow;
5521         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5522         flavor->flavor_info.oid.len = oid_len;
5523
5524         p = xdr_inline_decode(xdr, 8);
5525         if (unlikely(!p))
5526                 goto out_overflow;
5527         flavor->flavor_info.qop = be32_to_cpup(p++);
5528         flavor->flavor_info.service = be32_to_cpup(p);
5529
5530         return 0;
5531
5532 out_overflow:
5533         print_overflow_msg(__func__, xdr);
5534         return -EIO;
5535 out_err:
5536         return -EINVAL;
5537 }
5538
5539 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5540 {
5541         struct nfs4_secinfo4 *sec_flavor;
5542         unsigned int i, num_flavors;
5543         int status;
5544         __be32 *p;
5545
5546         p = xdr_inline_decode(xdr, 4);
5547         if (unlikely(!p))
5548                 goto out_overflow;
5549
5550         res->flavors->num_flavors = 0;
5551         num_flavors = be32_to_cpup(p);
5552
5553         for (i = 0; i < num_flavors; i++) {
5554                 sec_flavor = &res->flavors->flavors[i];
5555                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5556                         break;
5557
5558                 p = xdr_inline_decode(xdr, 4);
5559                 if (unlikely(!p))
5560                         goto out_overflow;
5561                 sec_flavor->flavor = be32_to_cpup(p);
5562
5563                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5564                         status = decode_secinfo_gss(xdr, sec_flavor);
5565                         if (status)
5566                                 goto out;
5567                 }
5568                 res->flavors->num_flavors++;
5569         }
5570
5571         status = 0;
5572 out:
5573         return status;
5574 out_overflow:
5575         print_overflow_msg(__func__, xdr);
5576         return -EIO;
5577 }
5578
5579 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5580 {
5581         int status = decode_op_hdr(xdr, OP_SECINFO);
5582         if (status)
5583                 return status;
5584         return decode_secinfo_common(xdr, res);
5585 }
5586
5587 #if defined(CONFIG_NFS_V4_1)
5588 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5589 {
5590         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5591         if (status)
5592                 return status;
5593         return decode_secinfo_common(xdr, res);
5594 }
5595
5596 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5597 {
5598         __be32 *p;
5599         uint32_t bitmap_words;
5600         unsigned int i;
5601
5602         p = xdr_inline_decode(xdr, 4);
5603         bitmap_words = be32_to_cpup(p++);
5604         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5605                 return -EIO;
5606         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5607         for (i = 0; i < bitmap_words; i++)
5608                 op_map->u.words[i] = be32_to_cpup(p++);
5609
5610         return 0;
5611 }
5612
5613 static int decode_exchange_id(struct xdr_stream *xdr,
5614                               struct nfs41_exchange_id_res *res)
5615 {
5616         __be32 *p;
5617         uint32_t dummy;
5618         char *dummy_str;
5619         int status;
5620         uint32_t impl_id_count;
5621
5622         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5623         if (status)
5624                 return status;
5625
5626         p = xdr_inline_decode(xdr, 8);
5627         if (unlikely(!p))
5628                 goto out_overflow;
5629         xdr_decode_hyper(p, &res->clientid);
5630         p = xdr_inline_decode(xdr, 12);
5631         if (unlikely(!p))
5632                 goto out_overflow;
5633         res->seqid = be32_to_cpup(p++);
5634         res->flags = be32_to_cpup(p++);
5635
5636         res->state_protect.how = be32_to_cpup(p);
5637         switch (res->state_protect.how) {
5638         case SP4_NONE:
5639                 break;
5640         case SP4_MACH_CRED:
5641                 status = decode_op_map(xdr, &res->state_protect.enforce);
5642                 if (status)
5643                         return status;
5644                 status = decode_op_map(xdr, &res->state_protect.allow);
5645                 if (status)
5646                         return status;
5647                 break;
5648         default:
5649                 WARN_ON_ONCE(1);
5650                 return -EIO;
5651         }
5652
5653         /* server_owner4.so_minor_id */
5654         p = xdr_inline_decode(xdr, 8);
5655         if (unlikely(!p))
5656                 goto out_overflow;
5657         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5658
5659         /* server_owner4.so_major_id */
5660         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661         if (unlikely(status))
5662                 return status;
5663         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5664                 return -EIO;
5665         memcpy(res->server_owner->major_id, dummy_str, dummy);
5666         res->server_owner->major_id_sz = dummy;
5667
5668         /* server_scope4 */
5669         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5670         if (unlikely(status))
5671                 return status;
5672         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5673                 return -EIO;
5674         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5675         res->server_scope->server_scope_sz = dummy;
5676
5677         /* Implementation Id */
5678         p = xdr_inline_decode(xdr, 4);
5679         if (unlikely(!p))
5680                 goto out_overflow;
5681         impl_id_count = be32_to_cpup(p++);
5682
5683         if (impl_id_count) {
5684                 /* nii_domain */
5685                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5686                 if (unlikely(status))
5687                         return status;
5688                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5689                         return -EIO;
5690                 memcpy(res->impl_id->domain, dummy_str, dummy);
5691
5692                 /* nii_name */
5693                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5694                 if (unlikely(status))
5695                         return status;
5696                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5697                         return -EIO;
5698                 memcpy(res->impl_id->name, dummy_str, dummy);
5699
5700                 /* nii_date */
5701                 p = xdr_inline_decode(xdr, 12);
5702                 if (unlikely(!p))
5703                         goto out_overflow;
5704                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5705                 res->impl_id->date.nseconds = be32_to_cpup(p);
5706
5707                 /* if there's more than one entry, ignore the rest */
5708         }
5709         return 0;
5710 out_overflow:
5711         print_overflow_msg(__func__, xdr);
5712         return -EIO;
5713 }
5714
5715 static int decode_chan_attrs(struct xdr_stream *xdr,
5716                              struct nfs4_channel_attrs *attrs)
5717 {
5718         __be32 *p;
5719         u32 nr_attrs, val;
5720
5721         p = xdr_inline_decode(xdr, 28);
5722         if (unlikely(!p))
5723                 goto out_overflow;
5724         val = be32_to_cpup(p++);        /* headerpadsz */
5725         if (val)
5726                 return -EINVAL;         /* no support for header padding yet */
5727         attrs->max_rqst_sz = be32_to_cpup(p++);
5728         attrs->max_resp_sz = be32_to_cpup(p++);
5729         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5730         attrs->max_ops = be32_to_cpup(p++);
5731         attrs->max_reqs = be32_to_cpup(p++);
5732         nr_attrs = be32_to_cpup(p);
5733         if (unlikely(nr_attrs > 1)) {
5734                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5735                         "count %u\n", __func__, nr_attrs);
5736                 return -EINVAL;
5737         }
5738         if (nr_attrs == 1) {
5739                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5740                 if (unlikely(!p))
5741                         goto out_overflow;
5742         }
5743         return 0;
5744 out_overflow:
5745         print_overflow_msg(__func__, xdr);
5746         return -EIO;
5747 }
5748
5749 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5750 {
5751         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5752 }
5753
5754 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5755                                 struct nfs41_bind_conn_to_session_res *res)
5756 {
5757         __be32 *p;
5758         int status;
5759
5760         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5761         if (!status)
5762                 status = decode_sessionid(xdr, &res->sessionid);
5763         if (unlikely(status))
5764                 return status;
5765
5766         /* dir flags, rdma mode bool */
5767         p = xdr_inline_decode(xdr, 8);
5768         if (unlikely(!p))
5769                 goto out_overflow;
5770
5771         res->dir = be32_to_cpup(p++);
5772         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5773                 return -EIO;
5774         if (be32_to_cpup(p) == 0)
5775                 res->use_conn_in_rdma_mode = false;
5776         else
5777                 res->use_conn_in_rdma_mode = true;
5778
5779         return 0;
5780 out_overflow:
5781         print_overflow_msg(__func__, xdr);
5782         return -EIO;
5783 }
5784
5785 static int decode_create_session(struct xdr_stream *xdr,
5786                                  struct nfs41_create_session_res *res)
5787 {
5788         __be32 *p;
5789         int status;
5790
5791         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5792         if (!status)
5793                 status = decode_sessionid(xdr, &res->sessionid);
5794         if (unlikely(status))
5795                 return status;
5796
5797         /* seqid, flags */
5798         p = xdr_inline_decode(xdr, 8);
5799         if (unlikely(!p))
5800                 goto out_overflow;
5801         res->seqid = be32_to_cpup(p++);
5802         res->flags = be32_to_cpup(p);
5803
5804         /* Channel attributes */
5805         status = decode_chan_attrs(xdr, &res->fc_attrs);
5806         if (!status)
5807                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5808         return status;
5809 out_overflow:
5810         print_overflow_msg(__func__, xdr);
5811         return -EIO;
5812 }
5813
5814 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5815 {
5816         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5817 }
5818
5819 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5820 {
5821         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5822 }
5823
5824 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5825 {
5826         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5827 }
5828 #endif /* CONFIG_NFS_V4_1 */
5829
5830 static int decode_sequence(struct xdr_stream *xdr,
5831                            struct nfs4_sequence_res *res,
5832                            struct rpc_rqst *rqstp)
5833 {
5834 #if defined(CONFIG_NFS_V4_1)
5835         struct nfs4_session *session;
5836         struct nfs4_sessionid id;
5837         u32 dummy;
5838         int status;
5839         __be32 *p;
5840
5841         if (res->sr_slot == NULL)
5842                 return 0;
5843         if (!res->sr_slot->table->session)
5844                 return 0;
5845
5846         status = decode_op_hdr(xdr, OP_SEQUENCE);
5847         if (!status)
5848                 status = decode_sessionid(xdr, &id);
5849         if (unlikely(status))
5850                 goto out_err;
5851
5852         /*
5853          * If the server returns different values for sessionID, slotID or
5854          * sequence number, the server is looney tunes.
5855          */
5856         status = -EREMOTEIO;
5857         session = res->sr_slot->table->session;
5858
5859         if (memcmp(id.data, session->sess_id.data,
5860                    NFS4_MAX_SESSIONID_LEN)) {
5861                 dprintk("%s Invalid session id\n", __func__);
5862                 goto out_err;
5863         }
5864
5865         p = xdr_inline_decode(xdr, 20);
5866         if (unlikely(!p))
5867                 goto out_overflow;
5868
5869         /* seqid */
5870         dummy = be32_to_cpup(p++);
5871         if (dummy != res->sr_slot->seq_nr) {
5872                 dprintk("%s Invalid sequence number\n", __func__);
5873                 goto out_err;
5874         }
5875         /* slot id */
5876         dummy = be32_to_cpup(p++);
5877         if (dummy != res->sr_slot->slot_nr) {
5878                 dprintk("%s Invalid slot id\n", __func__);
5879                 goto out_err;
5880         }
5881         /* highest slot id */
5882         res->sr_highest_slotid = be32_to_cpup(p++);
5883         /* target highest slot id */
5884         res->sr_target_highest_slotid = be32_to_cpup(p++);
5885         /* result flags */
5886         res->sr_status_flags = be32_to_cpup(p);
5887         status = 0;
5888 out_err:
5889         res->sr_status = status;
5890         return status;
5891 out_overflow:
5892         print_overflow_msg(__func__, xdr);
5893         status = -EIO;
5894         goto out_err;
5895 #else  /* CONFIG_NFS_V4_1 */
5896         return 0;
5897 #endif /* CONFIG_NFS_V4_1 */
5898 }
5899
5900 #if defined(CONFIG_NFS_V4_1)
5901 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5902 {
5903         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5904         return decode_stateid(xdr, stateid);
5905 }
5906
5907 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5908                                 struct nfs4_getdeviceinfo_res *res)
5909 {
5910         struct pnfs_device *pdev = res->pdev;
5911         __be32 *p;
5912         uint32_t len, type;
5913         int status;
5914
5915         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5916         if (status) {
5917                 if (status == -ETOOSMALL) {
5918                         p = xdr_inline_decode(xdr, 4);
5919                         if (unlikely(!p))
5920                                 goto out_overflow;
5921                         pdev->mincount = be32_to_cpup(p);
5922                         dprintk("%s: Min count too small. mincnt = %u\n",
5923                                 __func__, pdev->mincount);
5924                 }
5925                 return status;
5926         }
5927
5928         p = xdr_inline_decode(xdr, 8);
5929         if (unlikely(!p))
5930                 goto out_overflow;
5931         type = be32_to_cpup(p++);
5932         if (type != pdev->layout_type) {
5933                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5934                         __func__, pdev->layout_type, type);
5935                 return -EINVAL;
5936         }
5937         /*
5938          * Get the length of the opaque device_addr4. xdr_read_pages places
5939          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5940          * and places the remaining xdr data in xdr_buf->tail
5941          */
5942         pdev->mincount = be32_to_cpup(p);
5943         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5944                 goto out_overflow;
5945
5946         /* Parse notification bitmap, verifying that it is zero. */
5947         p = xdr_inline_decode(xdr, 4);
5948         if (unlikely(!p))
5949                 goto out_overflow;
5950         len = be32_to_cpup(p);
5951         if (len) {
5952                 uint32_t i;
5953
5954                 p = xdr_inline_decode(xdr, 4 * len);
5955                 if (unlikely(!p))
5956                         goto out_overflow;
5957
5958                 res->notification = be32_to_cpup(p++);
5959                 for (i = 1; i < len; i++) {
5960                         if (be32_to_cpup(p++)) {
5961                                 dprintk("%s: unsupported notification\n",
5962                                         __func__);
5963                                 return -EIO;
5964                         }
5965                 }
5966         }
5967         return 0;
5968 out_overflow:
5969         print_overflow_msg(__func__, xdr);
5970         return -EIO;
5971 }
5972
5973 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5974                             struct nfs4_layoutget_res *res)
5975 {
5976         __be32 *p;
5977         int status;
5978         u32 layout_count;
5979         u32 recvd;
5980
5981         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5982         if (status)
5983                 return status;
5984         p = xdr_inline_decode(xdr, 4);
5985         if (unlikely(!p))
5986                 goto out_overflow;
5987         res->return_on_close = be32_to_cpup(p);
5988         decode_layout_stateid(xdr, &res->stateid);
5989         p = xdr_inline_decode(xdr, 4);
5990         if (unlikely(!p))
5991                 goto out_overflow;
5992         layout_count = be32_to_cpup(p);
5993         if (!layout_count) {
5994                 dprintk("%s: server responded with empty layout array\n",
5995                         __func__);
5996                 return -EINVAL;
5997         }
5998
5999         p = xdr_inline_decode(xdr, 28);
6000         if (unlikely(!p))
6001                 goto out_overflow;
6002         p = xdr_decode_hyper(p, &res->range.offset);
6003         p = xdr_decode_hyper(p, &res->range.length);
6004         res->range.iomode = be32_to_cpup(p++);
6005         res->type = be32_to_cpup(p++);
6006         res->layoutp->len = be32_to_cpup(p);
6007
6008         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6009                 __func__,
6010                 (unsigned long)res->range.offset,
6011                 (unsigned long)res->range.length,
6012                 res->range.iomode,
6013                 res->type,
6014                 res->layoutp->len);
6015
6016         recvd = xdr_read_pages(xdr, res->layoutp->len);
6017         if (res->layoutp->len > recvd) {
6018                 dprintk("NFS: server cheating in layoutget reply: "
6019                                 "layout len %u > recvd %u\n",
6020                                 res->layoutp->len, recvd);
6021                 return -EINVAL;
6022         }
6023
6024         if (layout_count > 1) {
6025                 /* We only handle a length one array at the moment.  Any
6026                  * further entries are just ignored.  Note that this means
6027                  * the client may see a response that is less than the
6028                  * minimum it requested.
6029                  */
6030                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6031                         __func__, layout_count);
6032         }
6033
6034         return 0;
6035 out_overflow:
6036         print_overflow_msg(__func__, xdr);
6037         return -EIO;
6038 }
6039
6040 static int decode_layoutreturn(struct xdr_stream *xdr,
6041                                struct nfs4_layoutreturn_res *res)
6042 {
6043         __be32 *p;
6044         int status;
6045
6046         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6047         if (status)
6048                 return status;
6049         p = xdr_inline_decode(xdr, 4);
6050         if (unlikely(!p))
6051                 goto out_overflow;
6052         res->lrs_present = be32_to_cpup(p);
6053         if (res->lrs_present)
6054                 status = decode_layout_stateid(xdr, &res->stateid);
6055         return status;
6056 out_overflow:
6057         print_overflow_msg(__func__, xdr);
6058         return -EIO;
6059 }
6060
6061 static int decode_layoutcommit(struct xdr_stream *xdr,
6062                                struct rpc_rqst *req,
6063                                struct nfs4_layoutcommit_res *res)
6064 {
6065         __be32 *p;
6066         __u32 sizechanged;
6067         int status;
6068
6069         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6070         res->status = status;
6071         if (status)
6072                 return status;
6073
6074         p = xdr_inline_decode(xdr, 4);
6075         if (unlikely(!p))
6076                 goto out_overflow;
6077         sizechanged = be32_to_cpup(p);
6078
6079         if (sizechanged) {
6080                 /* throw away new size */
6081                 p = xdr_inline_decode(xdr, 8);
6082                 if (unlikely(!p))
6083                         goto out_overflow;
6084         }
6085         return 0;
6086 out_overflow:
6087         print_overflow_msg(__func__, xdr);
6088         return -EIO;
6089 }
6090
6091 static int decode_test_stateid(struct xdr_stream *xdr,
6092                                struct nfs41_test_stateid_res *res)
6093 {
6094         __be32 *p;
6095         int status;
6096         int num_res;
6097
6098         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6099         if (status)
6100                 return status;
6101
6102         p = xdr_inline_decode(xdr, 4);
6103         if (unlikely(!p))
6104                 goto out_overflow;
6105         num_res = be32_to_cpup(p++);
6106         if (num_res != 1)
6107                 goto out;
6108
6109         p = xdr_inline_decode(xdr, 4);
6110         if (unlikely(!p))
6111                 goto out_overflow;
6112         res->status = be32_to_cpup(p++);
6113
6114         return status;
6115 out_overflow:
6116         print_overflow_msg(__func__, xdr);
6117 out:
6118         return -EIO;
6119 }
6120
6121 static int decode_free_stateid(struct xdr_stream *xdr,
6122                                struct nfs41_free_stateid_res *res)
6123 {
6124         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6125         return res->status;
6126 }
6127 #else
6128 static inline
6129 int decode_layoutreturn(struct xdr_stream *xdr,
6130                                struct nfs4_layoutreturn_res *res)
6131 {
6132         return 0;
6133 }
6134 #endif /* CONFIG_NFS_V4_1 */
6135
6136 /*
6137  * END OF "GENERIC" DECODE ROUTINES.
6138  */
6139
6140 /*
6141  * Decode OPEN_DOWNGRADE response
6142  */
6143 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6144                                        struct xdr_stream *xdr,
6145                                        struct nfs_closeres *res)
6146 {
6147         struct compound_hdr hdr;
6148         int status;
6149
6150         status = decode_compound_hdr(xdr, &hdr);
6151         if (status)
6152                 goto out;
6153         status = decode_sequence(xdr, &res->seq_res, rqstp);
6154         if (status)
6155                 goto out;
6156         status = decode_putfh(xdr);
6157         if (status)
6158                 goto out;
6159         if (res->lr_res) {
6160                 status = decode_layoutreturn(xdr, res->lr_res);
6161                 res->lr_ret = status;
6162                 if (status)
6163                         goto out;
6164         }
6165         status = decode_open_downgrade(xdr, res);
6166 out:
6167         return status;
6168 }
6169
6170 /*
6171  * Decode ACCESS response
6172  */
6173 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174                                struct nfs4_accessres *res)
6175 {
6176         struct compound_hdr hdr;
6177         int status;
6178
6179         status = decode_compound_hdr(xdr, &hdr);
6180         if (status)
6181                 goto out;
6182         status = decode_sequence(xdr, &res->seq_res, rqstp);
6183         if (status)
6184                 goto out;
6185         status = decode_putfh(xdr);
6186         if (status != 0)
6187                 goto out;
6188         status = decode_access(xdr, &res->supported, &res->access);
6189         if (status != 0)
6190                 goto out;
6191         decode_getfattr(xdr, res->fattr, res->server);
6192 out:
6193         return status;
6194 }
6195
6196 /*
6197  * Decode LOOKUP response
6198  */
6199 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6200                                struct nfs4_lookup_res *res)
6201 {
6202         struct compound_hdr hdr;
6203         int status;
6204
6205         status = decode_compound_hdr(xdr, &hdr);
6206         if (status)
6207                 goto out;
6208         status = decode_sequence(xdr, &res->seq_res, rqstp);
6209         if (status)
6210                 goto out;
6211         status = decode_putfh(xdr);
6212         if (status)
6213                 goto out;
6214         status = decode_lookup(xdr);
6215         if (status)
6216                 goto out;
6217         status = decode_getfh(xdr, res->fh);
6218         if (status)
6219                 goto out;
6220         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6221 out:
6222         return status;
6223 }
6224
6225 /*
6226  * Decode LOOKUP_ROOT response
6227  */
6228 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6229                                     struct xdr_stream *xdr,
6230                                     struct nfs4_lookup_res *res)
6231 {
6232         struct compound_hdr hdr;
6233         int status;
6234
6235         status = decode_compound_hdr(xdr, &hdr);
6236         if (status)
6237                 goto out;
6238         status = decode_sequence(xdr, &res->seq_res, rqstp);
6239         if (status)
6240                 goto out;
6241         status = decode_putrootfh(xdr);
6242         if (status)
6243                 goto out;
6244         status = decode_getfh(xdr, res->fh);
6245         if (status == 0)
6246                 status = decode_getfattr_label(xdr, res->fattr,
6247                                                 res->label, res->server);
6248 out:
6249         return status;
6250 }
6251
6252 /*
6253  * Decode REMOVE response
6254  */
6255 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6256                                struct nfs_removeres *res)
6257 {
6258         struct compound_hdr hdr;
6259         int status;
6260
6261         status = decode_compound_hdr(xdr, &hdr);
6262         if (status)
6263                 goto out;
6264         status = decode_sequence(xdr, &res->seq_res, rqstp);
6265         if (status)
6266                 goto out;
6267         status = decode_putfh(xdr);
6268         if (status)
6269                 goto out;
6270         status = decode_remove(xdr, &res->cinfo);
6271 out:
6272         return status;
6273 }
6274
6275 /*
6276  * Decode RENAME response
6277  */
6278 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279                                struct nfs_renameres *res)
6280 {
6281         struct compound_hdr hdr;
6282         int status;
6283
6284         status = decode_compound_hdr(xdr, &hdr);
6285         if (status)
6286                 goto out;
6287         status = decode_sequence(xdr, &res->seq_res, rqstp);
6288         if (status)
6289                 goto out;
6290         status = decode_putfh(xdr);
6291         if (status)
6292                 goto out;
6293         status = decode_savefh(xdr);
6294         if (status)
6295                 goto out;
6296         status = decode_putfh(xdr);
6297         if (status)
6298                 goto out;
6299         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6300 out:
6301         return status;
6302 }
6303
6304 /*
6305  * Decode LINK response
6306  */
6307 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6308                              struct nfs4_link_res *res)
6309 {
6310         struct compound_hdr hdr;
6311         int status;
6312
6313         status = decode_compound_hdr(xdr, &hdr);
6314         if (status)
6315                 goto out;
6316         status = decode_sequence(xdr, &res->seq_res, rqstp);
6317         if (status)
6318                 goto out;
6319         status = decode_putfh(xdr);
6320         if (status)
6321                 goto out;
6322         status = decode_savefh(xdr);
6323         if (status)
6324                 goto out;
6325         status = decode_putfh(xdr);
6326         if (status)
6327                 goto out;
6328         status = decode_link(xdr, &res->cinfo);
6329         if (status)
6330                 goto out;
6331         /*
6332          * Note order: OP_LINK leaves the directory as the current
6333          *             filehandle.
6334          */
6335         status = decode_restorefh(xdr);
6336         if (status)
6337                 goto out;
6338         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6339 out:
6340         return status;
6341 }
6342
6343 /*
6344  * Decode CREATE response
6345  */
6346 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347                                struct nfs4_create_res *res)
6348 {
6349         struct compound_hdr hdr;
6350         int status;
6351
6352         status = decode_compound_hdr(xdr, &hdr);
6353         if (status)
6354                 goto out;
6355         status = decode_sequence(xdr, &res->seq_res, rqstp);
6356         if (status)
6357                 goto out;
6358         status = decode_putfh(xdr);
6359         if (status)
6360                 goto out;
6361         status = decode_create(xdr, &res->dir_cinfo);
6362         if (status)
6363                 goto out;
6364         status = decode_getfh(xdr, res->fh);
6365         if (status)
6366                 goto out;
6367         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6368 out:
6369         return status;
6370 }
6371
6372 /*
6373  * Decode SYMLINK response
6374  */
6375 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6376                                 struct nfs4_create_res *res)
6377 {
6378         return nfs4_xdr_dec_create(rqstp, xdr, res);
6379 }
6380
6381 /*
6382  * Decode GETATTR response
6383  */
6384 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6385                                 struct nfs4_getattr_res *res)
6386 {
6387         struct compound_hdr hdr;
6388         int status;
6389
6390         status = decode_compound_hdr(xdr, &hdr);
6391         if (status)
6392                 goto out;
6393         status = decode_sequence(xdr, &res->seq_res, rqstp);
6394         if (status)
6395                 goto out;
6396         status = decode_putfh(xdr);
6397         if (status)
6398                 goto out;
6399         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6400 out:
6401         return status;
6402 }
6403
6404 /*
6405  * Encode an SETACL request
6406  */
6407 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6408                                 struct nfs_setaclargs *args)
6409 {
6410         struct compound_hdr hdr = {
6411                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6412         };
6413
6414         encode_compound_hdr(xdr, req, &hdr);
6415         encode_sequence(xdr, &args->seq_args, &hdr);
6416         encode_putfh(xdr, args->fh, &hdr);
6417         encode_setacl(xdr, args, &hdr);
6418         encode_nops(&hdr);
6419 }
6420
6421 /*
6422  * Decode SETACL response
6423  */
6424 static int
6425 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6426                     struct nfs_setaclres *res)
6427 {
6428         struct compound_hdr hdr;
6429         int status;
6430
6431         status = decode_compound_hdr(xdr, &hdr);
6432         if (status)
6433                 goto out;
6434         status = decode_sequence(xdr, &res->seq_res, rqstp);
6435         if (status)
6436                 goto out;
6437         status = decode_putfh(xdr);
6438         if (status)
6439                 goto out;
6440         status = decode_setattr(xdr);
6441 out:
6442         return status;
6443 }
6444
6445 /*
6446  * Decode GETACL response
6447  */
6448 static int
6449 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450                     struct nfs_getaclres *res)
6451 {
6452         struct compound_hdr hdr;
6453         int status;
6454
6455         if (res->acl_scratch != NULL) {
6456                 void *p = page_address(res->acl_scratch);
6457                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6458         }
6459         status = decode_compound_hdr(xdr, &hdr);
6460         if (status)
6461                 goto out;
6462         status = decode_sequence(xdr, &res->seq_res, rqstp);
6463         if (status)
6464                 goto out;
6465         status = decode_putfh(xdr);
6466         if (status)
6467                 goto out;
6468         status = decode_getacl(xdr, rqstp, res);
6469
6470 out:
6471         return status;
6472 }
6473
6474 /*
6475  * Decode CLOSE response
6476  */
6477 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6478                               struct nfs_closeres *res)
6479 {
6480         struct compound_hdr hdr;
6481         int status;
6482
6483         status = decode_compound_hdr(xdr, &hdr);
6484         if (status)
6485                 goto out;
6486         status = decode_sequence(xdr, &res->seq_res, rqstp);
6487         if (status)
6488                 goto out;
6489         status = decode_putfh(xdr);
6490         if (status)
6491                 goto out;
6492         if (res->lr_res) {
6493                 status = decode_layoutreturn(xdr, res->lr_res);
6494                 res->lr_ret = status;
6495                 if (status)
6496                         goto out;
6497         }
6498         if (res->fattr != NULL) {
6499                 status = decode_getfattr(xdr, res->fattr, res->server);
6500                 if (status != 0)
6501                         goto out;
6502         }
6503         status = decode_close(xdr, res);
6504 out:
6505         return status;
6506 }
6507
6508 /*
6509  * Decode OPEN response
6510  */
6511 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512                              struct nfs_openres *res)
6513 {
6514         struct compound_hdr hdr;
6515         int status;
6516
6517         status = decode_compound_hdr(xdr, &hdr);
6518         if (status)
6519                 goto out;
6520         status = decode_sequence(xdr, &res->seq_res, rqstp);
6521         if (status)
6522                 goto out;
6523         status = decode_putfh(xdr);
6524         if (status)
6525                 goto out;
6526         status = decode_open(xdr, res);
6527         if (status)
6528                 goto out;
6529         status = decode_getfh(xdr, &res->fh);
6530         if (status)
6531                 goto out;
6532         if (res->access_request)
6533                 decode_access(xdr, &res->access_supported, &res->access_result);
6534         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6535 out:
6536         return status;
6537 }
6538
6539 /*
6540  * Decode OPEN_CONFIRM response
6541  */
6542 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6543                                      struct xdr_stream *xdr,
6544                                      struct nfs_open_confirmres *res)
6545 {
6546         struct compound_hdr hdr;
6547         int status;
6548
6549         status = decode_compound_hdr(xdr, &hdr);
6550         if (status)
6551                 goto out;
6552         status = decode_putfh(xdr);
6553         if (status)
6554                 goto out;
6555         status = decode_open_confirm(xdr, res);
6556 out:
6557         return status;
6558 }
6559
6560 /*
6561  * Decode OPEN response
6562  */
6563 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6564                                     struct xdr_stream *xdr,
6565                                     struct nfs_openres *res)
6566 {
6567         struct compound_hdr hdr;
6568         int status;
6569
6570         status = decode_compound_hdr(xdr, &hdr);
6571         if (status)
6572                 goto out;
6573         status = decode_sequence(xdr, &res->seq_res, rqstp);
6574         if (status)
6575                 goto out;
6576         status = decode_putfh(xdr);
6577         if (status)
6578                 goto out;
6579         status = decode_open(xdr, res);
6580         if (status)
6581                 goto out;
6582         if (res->access_request)
6583                 decode_access(xdr, &res->access_supported, &res->access_result);
6584         decode_getfattr(xdr, res->f_attr, res->server);
6585 out:
6586         return status;
6587 }
6588
6589 /*
6590  * Decode SETATTR response
6591  */
6592 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6593                                 struct xdr_stream *xdr,
6594                                 struct nfs_setattrres *res)
6595 {
6596         struct compound_hdr hdr;
6597         int status;
6598
6599         status = decode_compound_hdr(xdr, &hdr);
6600         if (status)
6601                 goto out;
6602         status = decode_sequence(xdr, &res->seq_res, rqstp);
6603         if (status)
6604                 goto out;
6605         status = decode_putfh(xdr);
6606         if (status)
6607                 goto out;
6608         status = decode_setattr(xdr);
6609         if (status)
6610                 goto out;
6611         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6612 out:
6613         return status;
6614 }
6615
6616 /*
6617  * Decode LOCK response
6618  */
6619 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6620                              struct nfs_lock_res *res)
6621 {
6622         struct compound_hdr hdr;
6623         int status;
6624
6625         status = decode_compound_hdr(xdr, &hdr);
6626         if (status)
6627                 goto out;
6628         status = decode_sequence(xdr, &res->seq_res, rqstp);
6629         if (status)
6630                 goto out;
6631         status = decode_putfh(xdr);
6632         if (status)
6633                 goto out;
6634         status = decode_lock(xdr, res);
6635 out:
6636         return status;
6637 }
6638
6639 /*
6640  * Decode LOCKT response
6641  */
6642 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6643                               struct nfs_lockt_res *res)
6644 {
6645         struct compound_hdr hdr;
6646         int status;
6647
6648         status = decode_compound_hdr(xdr, &hdr);
6649         if (status)
6650                 goto out;
6651         status = decode_sequence(xdr, &res->seq_res, rqstp);
6652         if (status)
6653                 goto out;
6654         status = decode_putfh(xdr);
6655         if (status)
6656                 goto out;
6657         status = decode_lockt(xdr, res);
6658 out:
6659         return status;
6660 }
6661
6662 /*
6663  * Decode LOCKU response
6664  */
6665 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6666                               struct nfs_locku_res *res)
6667 {
6668         struct compound_hdr hdr;
6669         int status;
6670
6671         status = decode_compound_hdr(xdr, &hdr);
6672         if (status)
6673                 goto out;
6674         status = decode_sequence(xdr, &res->seq_res, rqstp);
6675         if (status)
6676                 goto out;
6677         status = decode_putfh(xdr);
6678         if (status)
6679                 goto out;
6680         status = decode_locku(xdr, res);
6681 out:
6682         return status;
6683 }
6684
6685 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6686                                           struct xdr_stream *xdr, void *dummy)
6687 {
6688         struct compound_hdr hdr;
6689         int status;
6690
6691         status = decode_compound_hdr(xdr, &hdr);
6692         if (!status)
6693                 status = decode_release_lockowner(xdr);
6694         return status;
6695 }
6696
6697 /*
6698  * Decode READLINK response
6699  */
6700 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6701                                  struct xdr_stream *xdr,
6702                                  struct nfs4_readlink_res *res)
6703 {
6704         struct compound_hdr hdr;
6705         int status;
6706
6707         status = decode_compound_hdr(xdr, &hdr);
6708         if (status)
6709                 goto out;
6710         status = decode_sequence(xdr, &res->seq_res, rqstp);
6711         if (status)
6712                 goto out;
6713         status = decode_putfh(xdr);
6714         if (status)
6715                 goto out;
6716         status = decode_readlink(xdr, rqstp);
6717 out:
6718         return status;
6719 }
6720
6721 /*
6722  * Decode READDIR response
6723  */
6724 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725                                 struct nfs4_readdir_res *res)
6726 {
6727         struct compound_hdr hdr;
6728         int status;
6729
6730         status = decode_compound_hdr(xdr, &hdr);
6731         if (status)
6732                 goto out;
6733         status = decode_sequence(xdr, &res->seq_res, rqstp);
6734         if (status)
6735                 goto out;
6736         status = decode_putfh(xdr);
6737         if (status)
6738                 goto out;
6739         status = decode_readdir(xdr, rqstp, res);
6740 out:
6741         return status;
6742 }
6743
6744 /*
6745  * Decode Read response
6746  */
6747 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6748                              struct nfs_pgio_res *res)
6749 {
6750         struct compound_hdr hdr;
6751         int status;
6752
6753         status = decode_compound_hdr(xdr, &hdr);
6754         res->op_status = hdr.status;
6755         if (status)
6756                 goto out;
6757         status = decode_sequence(xdr, &res->seq_res, rqstp);
6758         if (status)
6759                 goto out;
6760         status = decode_putfh(xdr);
6761         if (status)
6762                 goto out;
6763         status = decode_read(xdr, rqstp, res);
6764         if (!status)
6765                 status = res->count;
6766 out:
6767         return status;
6768 }
6769
6770 /*
6771  * Decode WRITE response
6772  */
6773 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6774                               struct nfs_pgio_res *res)
6775 {
6776         struct compound_hdr hdr;
6777         int status;
6778
6779         status = decode_compound_hdr(xdr, &hdr);
6780         res->op_status = hdr.status;
6781         if (status)
6782                 goto out;
6783         status = decode_sequence(xdr, &res->seq_res, rqstp);
6784         if (status)
6785                 goto out;
6786         status = decode_putfh(xdr);
6787         if (status)
6788                 goto out;
6789         status = decode_write(xdr, res);
6790         if (status)
6791                 goto out;
6792         if (res->fattr)
6793                 decode_getfattr(xdr, res->fattr, res->server);
6794         if (!status)
6795                 status = res->count;
6796 out:
6797         return status;
6798 }
6799
6800 /*
6801  * Decode COMMIT response
6802  */
6803 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6804                                struct nfs_commitres *res)
6805 {
6806         struct compound_hdr hdr;
6807         int status;
6808
6809         status = decode_compound_hdr(xdr, &hdr);
6810         res->op_status = hdr.status;
6811         if (status)
6812                 goto out;
6813         status = decode_sequence(xdr, &res->seq_res, rqstp);
6814         if (status)
6815                 goto out;
6816         status = decode_putfh(xdr);
6817         if (status)
6818                 goto out;
6819         status = decode_commit(xdr, res);
6820 out:
6821         return status;
6822 }
6823
6824 /*
6825  * Decode FSINFO response
6826  */
6827 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6828                                struct nfs4_fsinfo_res *res)
6829 {
6830         struct compound_hdr hdr;
6831         int status;
6832
6833         status = decode_compound_hdr(xdr, &hdr);
6834         if (!status)
6835                 status = decode_sequence(xdr, &res->seq_res, req);
6836         if (!status)
6837                 status = decode_putfh(xdr);
6838         if (!status)
6839                 status = decode_fsinfo(xdr, res->fsinfo);
6840         return status;
6841 }
6842
6843 /*
6844  * Decode PATHCONF response
6845  */
6846 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6847                                  struct nfs4_pathconf_res *res)
6848 {
6849         struct compound_hdr hdr;
6850         int status;
6851
6852         status = decode_compound_hdr(xdr, &hdr);
6853         if (!status)
6854                 status = decode_sequence(xdr, &res->seq_res, req);
6855         if (!status)
6856                 status = decode_putfh(xdr);
6857         if (!status)
6858                 status = decode_pathconf(xdr, res->pathconf);
6859         return status;
6860 }
6861
6862 /*
6863  * Decode STATFS response
6864  */
6865 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6866                                struct nfs4_statfs_res *res)
6867 {
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (!status)
6873                 status = decode_sequence(xdr, &res->seq_res, req);
6874         if (!status)
6875                 status = decode_putfh(xdr);
6876         if (!status)
6877                 status = decode_statfs(xdr, res->fsstat);
6878         return status;
6879 }
6880
6881 /*
6882  * Decode GETATTR_BITMAP response
6883  */
6884 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6885                                     struct xdr_stream *xdr,
6886                                     struct nfs4_server_caps_res *res)
6887 {
6888         struct compound_hdr hdr;
6889         int status;
6890
6891         status = decode_compound_hdr(xdr, &hdr);
6892         if (status)
6893                 goto out;
6894         status = decode_sequence(xdr, &res->seq_res, req);
6895         if (status)
6896                 goto out;
6897         status = decode_putfh(xdr);
6898         if (status)
6899                 goto out;
6900         status = decode_server_caps(xdr, res);
6901 out:
6902         return status;
6903 }
6904
6905 /*
6906  * Decode RENEW response
6907  */
6908 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6909                               void *__unused)
6910 {
6911         struct compound_hdr hdr;
6912         int status;
6913
6914         status = decode_compound_hdr(xdr, &hdr);
6915         if (!status)
6916                 status = decode_renew(xdr);
6917         return status;
6918 }
6919
6920 /*
6921  * Decode SETCLIENTID response
6922  */
6923 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6924                                     struct xdr_stream *xdr,
6925                                     struct nfs4_setclientid_res *res)
6926 {
6927         struct compound_hdr hdr;
6928         int status;
6929
6930         status = decode_compound_hdr(xdr, &hdr);
6931         if (!status)
6932                 status = decode_setclientid(xdr, res);
6933         return status;
6934 }
6935
6936 /*
6937  * Decode SETCLIENTID_CONFIRM response
6938  */
6939 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6940                                             struct xdr_stream *xdr)
6941 {
6942         struct compound_hdr hdr;
6943         int status;
6944
6945         status = decode_compound_hdr(xdr, &hdr);
6946         if (!status)
6947                 status = decode_setclientid_confirm(xdr);
6948         return status;
6949 }
6950
6951 /*
6952  * Decode DELEGRETURN response
6953  */
6954 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6955                                     struct xdr_stream *xdr,
6956                                     struct nfs4_delegreturnres *res)
6957 {
6958         struct compound_hdr hdr;
6959         int status;
6960
6961         status = decode_compound_hdr(xdr, &hdr);
6962         if (status)
6963                 goto out;
6964         status = decode_sequence(xdr, &res->seq_res, rqstp);
6965         if (status)
6966                 goto out;
6967         status = decode_putfh(xdr);
6968         if (status != 0)
6969                 goto out;
6970         if (res->lr_res) {
6971                 status = decode_layoutreturn(xdr, res->lr_res);
6972                 res->lr_ret = status;
6973                 if (status)
6974                         goto out;
6975         }
6976         if (res->fattr) {
6977                 status = decode_getfattr(xdr, res->fattr, res->server);
6978                 if (status != 0)
6979                         goto out;
6980         }
6981         status = decode_delegreturn(xdr);
6982 out:
6983         return status;
6984 }
6985
6986 /*
6987  * Decode FS_LOCATIONS response
6988  */
6989 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6990                                      struct xdr_stream *xdr,
6991                                      struct nfs4_fs_locations_res *res)
6992 {
6993         struct compound_hdr hdr;
6994         int status;
6995
6996         status = decode_compound_hdr(xdr, &hdr);
6997         if (status)
6998                 goto out;
6999         status = decode_sequence(xdr, &res->seq_res, req);
7000         if (status)
7001                 goto out;
7002         status = decode_putfh(xdr);
7003         if (status)
7004                 goto out;
7005         if (res->migration) {
7006                 xdr_enter_page(xdr, PAGE_SIZE);
7007                 status = decode_getfattr_generic(xdr,
7008                                         &res->fs_locations->fattr,
7009                                          NULL, res->fs_locations,
7010                                          NULL, res->fs_locations->server);
7011                 if (status)
7012                         goto out;
7013                 if (res->renew)
7014                         status = decode_renew(xdr);
7015         } else {
7016                 status = decode_lookup(xdr);
7017                 if (status)
7018                         goto out;
7019                 xdr_enter_page(xdr, PAGE_SIZE);
7020                 status = decode_getfattr_generic(xdr,
7021                                         &res->fs_locations->fattr,
7022                                          NULL, res->fs_locations,
7023                                          NULL, res->fs_locations->server);
7024         }
7025 out:
7026         return status;
7027 }
7028
7029 /*
7030  * Decode SECINFO response
7031  */
7032 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7033                                 struct xdr_stream *xdr,
7034                                 struct nfs4_secinfo_res *res)
7035 {
7036         struct compound_hdr hdr;
7037         int status;
7038
7039         status = decode_compound_hdr(xdr, &hdr);
7040         if (status)
7041                 goto out;
7042         status = decode_sequence(xdr, &res->seq_res, rqstp);
7043         if (status)
7044                 goto out;
7045         status = decode_putfh(xdr);
7046         if (status)
7047                 goto out;
7048         status = decode_secinfo(xdr, res);
7049 out:
7050         return status;
7051 }
7052
7053 /*
7054  * Decode FSID_PRESENT response
7055  */
7056 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7057                                      struct xdr_stream *xdr,
7058                                      struct nfs4_fsid_present_res *res)
7059 {
7060         struct compound_hdr hdr;
7061         int status;
7062
7063         status = decode_compound_hdr(xdr, &hdr);
7064         if (status)
7065                 goto out;
7066         status = decode_sequence(xdr, &res->seq_res, rqstp);
7067         if (status)
7068                 goto out;
7069         status = decode_putfh(xdr);
7070         if (status)
7071                 goto out;
7072         status = decode_getfh(xdr, res->fh);
7073         if (status)
7074                 goto out;
7075         if (res->renew)
7076                 status = decode_renew(xdr);
7077 out:
7078         return status;
7079 }
7080
7081 #if defined(CONFIG_NFS_V4_1)
7082 /*
7083  * Decode BIND_CONN_TO_SESSION response
7084  */
7085 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7086                                         struct xdr_stream *xdr,
7087                                         void *res)
7088 {
7089         struct compound_hdr hdr;
7090         int status;
7091
7092         status = decode_compound_hdr(xdr, &hdr);
7093         if (!status)
7094                 status = decode_bind_conn_to_session(xdr, res);
7095         return status;
7096 }
7097
7098 /*
7099  * Decode EXCHANGE_ID response
7100  */
7101 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7102                                     struct xdr_stream *xdr,
7103                                     void *res)
7104 {
7105         struct compound_hdr hdr;
7106         int status;
7107
7108         status = decode_compound_hdr(xdr, &hdr);
7109         if (!status)
7110                 status = decode_exchange_id(xdr, res);
7111         return status;
7112 }
7113
7114 /*
7115  * Decode CREATE_SESSION response
7116  */
7117 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7118                                        struct xdr_stream *xdr,
7119                                        struct nfs41_create_session_res *res)
7120 {
7121         struct compound_hdr hdr;
7122         int status;
7123
7124         status = decode_compound_hdr(xdr, &hdr);
7125         if (!status)
7126                 status = decode_create_session(xdr, res);
7127         return status;
7128 }
7129
7130 /*
7131  * Decode DESTROY_SESSION response
7132  */
7133 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7134                                         struct xdr_stream *xdr,
7135                                         void *res)
7136 {
7137         struct compound_hdr hdr;
7138         int status;
7139
7140         status = decode_compound_hdr(xdr, &hdr);
7141         if (!status)
7142                 status = decode_destroy_session(xdr, res);
7143         return status;
7144 }
7145
7146 /*
7147  * Decode DESTROY_CLIENTID response
7148  */
7149 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7150                                         struct xdr_stream *xdr,
7151                                         void *res)
7152 {
7153         struct compound_hdr hdr;
7154         int status;
7155
7156         status = decode_compound_hdr(xdr, &hdr);
7157         if (!status)
7158                 status = decode_destroy_clientid(xdr, res);
7159         return status;
7160 }
7161
7162 /*
7163  * Decode SEQUENCE response
7164  */
7165 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7166                                  struct xdr_stream *xdr,
7167                                  struct nfs4_sequence_res *res)
7168 {
7169         struct compound_hdr hdr;
7170         int status;
7171
7172         status = decode_compound_hdr(xdr, &hdr);
7173         if (!status)
7174                 status = decode_sequence(xdr, res, rqstp);
7175         return status;
7176 }
7177
7178 /*
7179  * Decode GET_LEASE_TIME response
7180  */
7181 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7182                                        struct xdr_stream *xdr,
7183                                        struct nfs4_get_lease_time_res *res)
7184 {
7185         struct compound_hdr hdr;
7186         int status;
7187
7188         status = decode_compound_hdr(xdr, &hdr);
7189         if (!status)
7190                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7191         if (!status)
7192                 status = decode_putrootfh(xdr);
7193         if (!status)
7194                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7195         return status;
7196 }
7197
7198 /*
7199  * Decode RECLAIM_COMPLETE response
7200  */
7201 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7202                                          struct xdr_stream *xdr,
7203                                          struct nfs41_reclaim_complete_res *res)
7204 {
7205         struct compound_hdr hdr;
7206         int status;
7207
7208         status = decode_compound_hdr(xdr, &hdr);
7209         if (!status)
7210                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7211         if (!status)
7212                 status = decode_reclaim_complete(xdr, NULL);
7213         return status;
7214 }
7215
7216 /*
7217  * Decode GETDEVINFO response
7218  */
7219 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7220                                       struct xdr_stream *xdr,
7221                                       struct nfs4_getdeviceinfo_res *res)
7222 {
7223         struct compound_hdr hdr;
7224         int status;
7225
7226         status = decode_compound_hdr(xdr, &hdr);
7227         if (status != 0)
7228                 goto out;
7229         status = decode_sequence(xdr, &res->seq_res, rqstp);
7230         if (status != 0)
7231                 goto out;
7232         status = decode_getdeviceinfo(xdr, res);
7233 out:
7234         return status;
7235 }
7236
7237 /*
7238  * Decode LAYOUTGET response
7239  */
7240 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7241                                   struct xdr_stream *xdr,
7242                                   struct nfs4_layoutget_res *res)
7243 {
7244         struct compound_hdr hdr;
7245         int status;
7246
7247         status = decode_compound_hdr(xdr, &hdr);
7248         if (status)
7249                 goto out;
7250         status = decode_sequence(xdr, &res->seq_res, rqstp);
7251         if (status)
7252                 goto out;
7253         status = decode_putfh(xdr);
7254         if (status)
7255                 goto out;
7256         status = decode_layoutget(xdr, rqstp, res);
7257 out:
7258         return status;
7259 }
7260
7261 /*
7262  * Decode LAYOUTRETURN response
7263  */
7264 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7265                                      struct xdr_stream *xdr,
7266                                      struct nfs4_layoutreturn_res *res)
7267 {
7268         struct compound_hdr hdr;
7269         int status;
7270
7271         status = decode_compound_hdr(xdr, &hdr);
7272         if (status)
7273                 goto out;
7274         status = decode_sequence(xdr, &res->seq_res, rqstp);
7275         if (status)
7276                 goto out;
7277         status = decode_putfh(xdr);
7278         if (status)
7279                 goto out;
7280         status = decode_layoutreturn(xdr, res);
7281 out:
7282         return status;
7283 }
7284
7285 /*
7286  * Decode LAYOUTCOMMIT response
7287  */
7288 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7289                                      struct xdr_stream *xdr,
7290                                      struct nfs4_layoutcommit_res *res)
7291 {
7292         struct compound_hdr hdr;
7293         int status;
7294
7295         status = decode_compound_hdr(xdr, &hdr);
7296         if (status)
7297                 goto out;
7298         status = decode_sequence(xdr, &res->seq_res, rqstp);
7299         if (status)
7300                 goto out;
7301         status = decode_putfh(xdr);
7302         if (status)
7303                 goto out;
7304         status = decode_layoutcommit(xdr, rqstp, res);
7305         if (status)
7306                 goto out;
7307         decode_getfattr(xdr, res->fattr, res->server);
7308 out:
7309         return status;
7310 }
7311
7312 /*
7313  * Decode SECINFO_NO_NAME response
7314  */
7315 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7316                                         struct xdr_stream *xdr,
7317                                         struct nfs4_secinfo_res *res)
7318 {
7319         struct compound_hdr hdr;
7320         int status;
7321
7322         status = decode_compound_hdr(xdr, &hdr);
7323         if (status)
7324                 goto out;
7325         status = decode_sequence(xdr, &res->seq_res, rqstp);
7326         if (status)
7327                 goto out;
7328         status = decode_putrootfh(xdr);
7329         if (status)
7330                 goto out;
7331         status = decode_secinfo_no_name(xdr, res);
7332 out:
7333         return status;
7334 }
7335
7336 /*
7337  * Decode TEST_STATEID response
7338  */
7339 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7340                                      struct xdr_stream *xdr,
7341                                      struct nfs41_test_stateid_res *res)
7342 {
7343         struct compound_hdr hdr;
7344         int status;
7345
7346         status = decode_compound_hdr(xdr, &hdr);
7347         if (status)
7348                 goto out;
7349         status = decode_sequence(xdr, &res->seq_res, rqstp);
7350         if (status)
7351                 goto out;
7352         status = decode_test_stateid(xdr, res);
7353 out:
7354         return status;
7355 }
7356
7357 /*
7358  * Decode FREE_STATEID response
7359  */
7360 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7361                                      struct xdr_stream *xdr,
7362                                      struct nfs41_free_stateid_res *res)
7363 {
7364         struct compound_hdr hdr;
7365         int status;
7366
7367         status = decode_compound_hdr(xdr, &hdr);
7368         if (status)
7369                 goto out;
7370         status = decode_sequence(xdr, &res->seq_res, rqstp);
7371         if (status)
7372                 goto out;
7373         status = decode_free_stateid(xdr, res);
7374 out:
7375         return status;
7376 }
7377 #endif /* CONFIG_NFS_V4_1 */
7378
7379 /**
7380  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7381  *                      the local page cache.
7382  * @xdr: XDR stream where entry resides
7383  * @entry: buffer to fill in with entry data
7384  * @plus: boolean indicating whether this should be a readdirplus entry
7385  *
7386  * Returns zero if successful, otherwise a negative errno value is
7387  * returned.
7388  *
7389  * This function is not invoked during READDIR reply decoding, but
7390  * rather whenever an application invokes the getdents(2) system call
7391  * on a directory already in our cache.
7392  */
7393 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7394                        int plus)
7395 {
7396         unsigned int savep;
7397         uint32_t bitmap[3] = {0};
7398         uint32_t len;
7399         __be32 *p = xdr_inline_decode(xdr, 4);
7400         if (unlikely(!p))
7401                 goto out_overflow;
7402         if (*p == xdr_zero) {
7403                 p = xdr_inline_decode(xdr, 4);
7404                 if (unlikely(!p))
7405                         goto out_overflow;
7406                 if (*p == xdr_zero)
7407                         return -EAGAIN;
7408                 entry->eof = 1;
7409                 return -EBADCOOKIE;
7410         }
7411
7412         p = xdr_inline_decode(xdr, 12);
7413         if (unlikely(!p))
7414                 goto out_overflow;
7415         entry->prev_cookie = entry->cookie;
7416         p = xdr_decode_hyper(p, &entry->cookie);
7417         entry->len = be32_to_cpup(p);
7418
7419         p = xdr_inline_decode(xdr, entry->len);
7420         if (unlikely(!p))
7421                 goto out_overflow;
7422         entry->name = (const char *) p;
7423
7424         /*
7425          * In case the server doesn't return an inode number,
7426          * we fake one here.  (We don't use inode number 0,
7427          * since glibc seems to choke on it...)
7428          */
7429         entry->ino = 1;
7430         entry->fattr->valid = 0;
7431
7432         if (decode_attr_bitmap(xdr, bitmap) < 0)
7433                 goto out_overflow;
7434
7435         if (decode_attr_length(xdr, &len, &savep) < 0)
7436                 goto out_overflow;
7437
7438         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7439                         NULL, entry->label, entry->server) < 0)
7440                 goto out_overflow;
7441         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7442                 entry->ino = entry->fattr->mounted_on_fileid;
7443         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7444                 entry->ino = entry->fattr->fileid;
7445
7446         entry->d_type = DT_UNKNOWN;
7447         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7448                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7449
7450         return 0;
7451
7452 out_overflow:
7453         print_overflow_msg(__func__, xdr);
7454         return -EAGAIN;
7455 }
7456
7457 /*
7458  * We need to translate between nfs status return values and
7459  * the local errno values which may not be the same.
7460  */
7461 static struct {
7462         int stat;
7463         int errno;
7464 } nfs_errtbl[] = {
7465         { NFS4_OK,              0               },
7466         { NFS4ERR_PERM,         -EPERM          },
7467         { NFS4ERR_NOENT,        -ENOENT         },
7468         { NFS4ERR_IO,           -errno_NFSERR_IO},
7469         { NFS4ERR_NXIO,         -ENXIO          },
7470         { NFS4ERR_ACCESS,       -EACCES         },
7471         { NFS4ERR_EXIST,        -EEXIST         },
7472         { NFS4ERR_XDEV,         -EXDEV          },
7473         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7474         { NFS4ERR_ISDIR,        -EISDIR         },
7475         { NFS4ERR_INVAL,        -EINVAL         },
7476         { NFS4ERR_FBIG,         -EFBIG          },
7477         { NFS4ERR_NOSPC,        -ENOSPC         },
7478         { NFS4ERR_ROFS,         -EROFS          },
7479         { NFS4ERR_MLINK,        -EMLINK         },
7480         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7481         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7482         { NFS4ERR_DQUOT,        -EDQUOT         },
7483         { NFS4ERR_STALE,        -ESTALE         },
7484         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7485         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7486         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7487         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7488         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7489         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7490         { NFS4ERR_LOCKED,       -EAGAIN         },
7491         { NFS4ERR_SYMLINK,      -ELOOP          },
7492         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7493         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7494         { -1,                   -EIO            }
7495 };
7496
7497 /*
7498  * Convert an NFS error code to a local one.
7499  * This one is used jointly by NFSv2 and NFSv3.
7500  */
7501 static int
7502 nfs4_stat_to_errno(int stat)
7503 {
7504         int i;
7505         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7506                 if (nfs_errtbl[i].stat == stat)
7507                         return nfs_errtbl[i].errno;
7508         }
7509         if (stat <= 10000 || stat > 10100) {
7510                 /* The server is looney tunes. */
7511                 return -EREMOTEIO;
7512         }
7513         /* If we cannot translate the error, the recovery routines should
7514          * handle it.
7515          * Note: remaining NFSv4 error codes have values > 10000, so should
7516          * not conflict with native Linux error codes.
7517          */
7518         return -stat;
7519 }
7520
7521 #ifdef CONFIG_NFS_V4_2
7522 #include "nfs42xdr.c"
7523 #endif /* CONFIG_NFS_V4_2 */
7524
7525 #define PROC(proc, argtype, restype)                            \
7526 [NFSPROC4_CLNT_##proc] = {                                      \
7527         .p_proc   = NFSPROC4_COMPOUND,                          \
7528         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7529         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7530         .p_arglen = NFS4_##argtype##_sz,                        \
7531         .p_replen = NFS4_##restype##_sz,                        \
7532         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7533         .p_name   = #proc,                                      \
7534 }
7535
7536 #define STUB(proc)              \
7537 [NFSPROC4_CLNT_##proc] = {      \
7538         .p_name = #proc,        \
7539 }
7540
7541 struct rpc_procinfo     nfs4_procedures[] = {
7542         PROC(READ,              enc_read,               dec_read),
7543         PROC(WRITE,             enc_write,              dec_write),
7544         PROC(COMMIT,            enc_commit,             dec_commit),
7545         PROC(OPEN,              enc_open,               dec_open),
7546         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7547         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7548         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7549         PROC(CLOSE,             enc_close,              dec_close),
7550         PROC(SETATTR,           enc_setattr,            dec_setattr),
7551         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7552         PROC(RENEW,             enc_renew,              dec_renew),
7553         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7554         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7555         PROC(LOCK,              enc_lock,               dec_lock),
7556         PROC(LOCKT,             enc_lockt,              dec_lockt),
7557         PROC(LOCKU,             enc_locku,              dec_locku),
7558         PROC(ACCESS,            enc_access,             dec_access),
7559         PROC(GETATTR,           enc_getattr,            dec_getattr),
7560         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7561         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7562         PROC(REMOVE,            enc_remove,             dec_remove),
7563         PROC(RENAME,            enc_rename,             dec_rename),
7564         PROC(LINK,              enc_link,               dec_link),
7565         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7566         PROC(CREATE,            enc_create,             dec_create),
7567         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7568         PROC(STATFS,            enc_statfs,             dec_statfs),
7569         PROC(READLINK,          enc_readlink,           dec_readlink),
7570         PROC(READDIR,           enc_readdir,            dec_readdir),
7571         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7572         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7573         PROC(GETACL,            enc_getacl,             dec_getacl),
7574         PROC(SETACL,            enc_setacl,             dec_setacl),
7575         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7576         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7577         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7578         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7579 #if defined(CONFIG_NFS_V4_1)
7580         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7581         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7582         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7583         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7584         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7585         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7586         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7587         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7588         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7589         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7590         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7591         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7592         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7593         STUB(GETDEVICELIST),
7594         PROC(BIND_CONN_TO_SESSION,
7595                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7596         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7597 #endif /* CONFIG_NFS_V4_1 */
7598 #ifdef CONFIG_NFS_V4_2
7599         PROC(SEEK,              enc_seek,               dec_seek),
7600         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7601         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7602         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7603         PROC(CLONE,             enc_clone,              dec_clone),
7604         PROC(COPY,              enc_copy,               dec_copy),
7605 #endif /* CONFIG_NFS_V4_2 */
7606 };
7607
7608 const struct rpc_version nfs_version4 = {
7609         .number                 = 4,
7610         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7611         .procs                  = nfs4_procedures
7612 };
7613
7614 /*
7615  * Local variables:
7616  *  c-basic-offset: 8
7617  * End:
7618  */